:root {
  --bg-primary: #0f0f1a;
  --bg-secondary: #1a1a2e;
  --bg-tertiary: #16213e;
  --bg-card: rgba(26, 26, 46, 0.72);
  --bg-glass: rgba(255, 255, 255, 0.06);
  --bg-glass-hover: rgba(255, 255, 255, 0.1);
  --text-primary: #eaeaf2;
  --text-secondary: #b8b8cc;
  --text-muted: #8a8aa3;
  --accent: #e94560;
  --accent-hover: #ff5c75;
  --accent-soft: rgba(233, 69, 96, 0.15);
  --accent-gradient: linear-gradient(135deg, #e94560 0%, #533483 100%);
  --hero-gradient: linear-gradient(135deg, #1a1a2e 0%, #16213e 40%, #0f3460 75%, #533483 100%);
  --border-color: rgba(255, 255, 255, 0.08);
  --border-accent: rgba(233, 69, 96, 0.35);
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.25);
  --shadow-md: 0 8px 24px rgba(0, 0, 0, 0.35);
  --shadow-lg: 0 16px 48px rgba(0, 0, 0, 0.45);
  --shadow-glow: 0 0 24px rgba(233, 69, 96, 0.25);
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 22px;
  --radius-full: 999px;
  --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --font-sans: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --max-width: 1200px;
}

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

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-sans);
  background: var(--bg-primary);
  background-image:
    radial-gradient(ellipse at 15% 0%, rgba(233, 69, 96, 0.12) 0%, transparent 45%),
    radial-gradient(ellipse at 85% 10%, rgba(83, 52, 131, 0.16) 0%, transparent 50%),
    radial-gradient(ellipse at 50% 100%, rgba(15, 52, 96, 0.18) 0%, transparent 55%);
  background-attachment: fixed;
  color: var(--text-primary);
  line-height: 1.75;
  font-size: 16px;
  min-height: 100vh;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body > a[href="#main-content"] {
  position: absolute;
  left: -9999px;
  top: 0;
  z-index: 9999;
  padding: 12px 24px;
  background: var(--accent);
  color: #fff;
  border-radius: 0 0 var(--radius-sm) 0;
  font-weight: 600;
  text-decoration: none;
}

body > a[href="#main-content"]:focus {
  left: 0;
}

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

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

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

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

ul,
ol {
  list-style: none;
}

h1, h2, h3, h4 {
  line-height: 1.35;
  font-weight: 700;
  color: var(--text-primary);
  letter-spacing: 0.01em;
}

h1 {
  font-size: clamp(1.75rem, 4vw, 2.75rem);
  background: linear-gradient(120deg, #ffffff 0%, #ffd6dd 45%, #e94560 100%);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  margin-bottom: 1.25rem;
}

h2 {
  font-size: clamp(1.35rem, 2.6vw, 1.9rem);
  margin-bottom: 1.25rem;
  position: relative;
  padding-left: 1rem;
}

h2::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.18em;
  bottom: 0.18em;
  width: 4px;
  border-radius: var(--radius-full);
  background: var(--accent-gradient);
  box-shadow: var(--shadow-glow);
}

h3 {
  font-size: clamp(1.1rem, 2vw, 1.35rem);
  margin-bottom: 0.75rem;
  color: #f2f2fa;
}

h4 {
  font-size: 1rem;
  margin-bottom: 0.5rem;
  color: var(--text-secondary);
}

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

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

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

/* ===== Header ===== */
header[role="banner"] {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(15, 15, 26, 0.72);
  backdrop-filter: blur(20px) saturate(160%);
  -webkit-backdrop-filter: blur(20px) saturate(160%);
  border-bottom: 1px solid var(--border-color);
  box-shadow: 0 4px 30px rgba(0, 0, 0, 0.3);
}

header[role="banner"] > div {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0.75rem 1.25rem;
  display: flex;
  align-items: center;
  gap: 1rem;
  flex-wrap: wrap;
}

header[role="banner"] a[aria-label="99ysj影视首页"] {
  flex-shrink: 0;
  display: inline-flex;
  transition: transform var(--transition), filter var(--transition);
}

header[role="banner"] a[aria-label="99ysj影视首页"]:hover {
  transform: scale(1.05);
  filter: drop-shadow(0 0 12px rgba(233, 69, 96, 0.5));
}

header nav[aria-label="主导航"] {
  flex: 1 1 auto;
  min-width: 0;
}

header nav[aria-label="主导航"] ul {
  display: flex;
  align-items: center;
  gap: 0.25rem;
  flex-wrap: wrap;
}

header nav[aria-label="主导航"] a {
  display: inline-block;
  padding: 0.45rem 0.8rem;
  border-radius: var(--radius-full);
  font-size: 0.92rem;
  color: var(--text-secondary);
  white-space: nowrap;
  transition: all var(--transition);
  position: relative;
}

header nav[aria-label="主导航"] a:hover {
  color: #fff;
  background: var(--bg-glass-hover);
  transform: translateY(-1px);
}

header nav[aria-label="主导航"] a[aria-current="page"] {
  color: #fff;
  background: var(--accent-gradient);
  box-shadow: var(--shadow-glow);
}

header form[role="search"] {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  flex: 0 1 300px;
}

header form[role="search"] label {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
}

header form[role="search"] input[type="search"] {
  flex: 1;
  min-width: 0;
  padding: 0.55rem 1rem;
  border-radius: var(--radius-full);
  border: 1px solid var(--border-color);
  background: var(--bg-glass);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  color: var(--text-primary);
  font-size: 0.9rem;
  font-family: inherit;
  transition: all var(--transition);
}

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

header form[role="search"] input[type="search"]:focus {
  border-color: var(--border-accent);
  background: rgba(255, 255, 255, 0.1);
  box-shadow: 0 0 0 3px var(--accent-soft);
  outline: none;
}

header form[role="search"] button[type="submit"] {
  padding: 0.55rem 1.1rem;
  border: none;
  border-radius: var(--radius-full);
  background: var(--accent-gradient);
  color: #fff;
  font-size: 0.9rem;
  font-weight: 600;
  font-family: inherit;
  cursor: pointer;
  transition: all var(--transition);
  white-space: nowrap;
}

header form[role="search"] button[type="submit"]:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-glow);
}

header button[type="button"] {
  padding: 0.5rem 0.9rem;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-full);
  background: var(--bg-glass);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  color: var(--text-secondary);
  font-size: 0.85rem;
  font-family: inherit;
  cursor: pointer;
  transition: all var(--transition);
  white-space: nowrap;
}

header button[type="button"]:hover {
  color: #fff;
  border-color: var(--border-accent);
  background: var(--bg-glass-hover);
  transform: translateY(-2px);
}

#menu-toggle {
  display: none;
}

/* ===== Breadcrumb ===== */
nav[aria-label="面包屑导航"] {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 1rem 1.25rem 0;
}

nav[aria-label="面包屑导航"] ol {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.4rem;
  font-size: 0.85rem;
  color: var(--text-muted);
}

nav[aria-label="面包屑导航"] li {
  display: inline-flex;
  align-items: center;
}

nav[aria-label="面包屑导航"] li:not(:last-child)::after {
  content: "›";
  margin-left: 0.4rem;
  color: var(--text-muted);
  opacity: 0.6;
}

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

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

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

/* ===== Main layout ===== */
main {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 1.5rem 1.25rem 3rem;
  display: flex;
  flex-direction: column;
  gap: 2.5rem;
}

main section {
  scroll-margin-top: 90px;
  animation: fadeInUp 0.7s cubic-bezier(0.4, 0, 0.2, 1) both;
}

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

main section:nth-child(1) { animation-delay: 0.02s; }
main section:nth-child(2) { animation-delay: 0.06s; }
main section:nth-child(3) { animation-delay: 0.1s; }
main section:nth-child(4) { animation-delay: 0.14s; }
main section:nth-child(5) { animation-delay: 0.18s; }
main section:nth-child(6) { animation-delay: 0.22s; }

main section > article {
  background: var(--bg-card);
  backdrop-filter: blur(16px) saturate(140%);
  -webkit-backdrop-filter: blur(16px) saturate(140%);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 1.5rem 1.6rem;
  margin-bottom: 1.25rem;
  box-shadow: var(--shadow-sm);
  transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
}

main section > article:hover {
  transform: translateY(-4px);
  border-color: var(--border-accent);
  box-shadow: var(--shadow-md), var(--shadow-glow);
}

main section > article:last-child {
  margin-bottom: 0;
}

/* ===== Hero section ===== */
main section[aria-labelledby="hero-title"] {
  position: relative;
  background: var(--hero-gradient);
  border-radius: var(--radius-lg);
  padding: 2.5rem 2rem;
  overflow: hidden;
  border: 1px solid var(--border-color);
  box-shadow: var(--shadow-lg);
}

main section[aria-labelledby="hero-title"]::before {
  content: "";
  position: absolute;
  top: -50%;
  right: -20%;
  width: 500px;
  height: 500px;
  background: radial-gradient(circle, rgba(233, 69, 96, 0.25) 0%, transparent 70%);
  border-radius: 50%;
  pointer-events: none;
  animation: floatGlow 8s ease-in-out infinite;
}

main section[aria-labelledby="hero-title"]::after {
  content: "";
  position: absolute;
  bottom: -40%;
  left: -10%;
  width: 400px;
  height: 400px;
  background: radial-gradient(circle, rgba(83, 52, 131, 0.3) 0%, transparent 70%);
  border-radius: 50%;
  pointer-events: none;
  animation: floatGlow 10s ease-in-out infinite reverse;
}

@keyframes floatGlow {
  0%, 100% { transform: translate(0, 0) scale(1); }
  50% { transform: translate(-20px, 20px) scale(1.08); }
}

main section[aria-labelledby="hero-title"] > * {
  position: relative;
  z-index: 1;
}

main section[aria-labelledby="hero-title"] > p {
  color: rgba(255, 255, 255, 0.82);
  max-width: 820px;
}

main section[aria-labelledby="hero-title"] > p strong {
  color: #ffd6dd;
}

main section[aria-labelledby="hero-title"] div[role="region"] {
  margin: 1.75rem 0;
}

main section[aria-labelledby="hero-title"] div[role="region"] ul {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  gap: 1rem;
}

main section[aria-labelledby="hero-title"] div[role="region"] li {
  background: var(--bg-glass);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 1rem 1.1rem;
  font-size: 0.9rem;
  color: rgba(255, 255, 255, 0.75);
  transition: all var(--transition);
  text-align: center;
}

main section[aria-labelledby="hero-title"] div[role="region"] li:hover {
  transform: translateY(-4px) scale(1.02);
  background: var(--bg-glass-hover);
  border-color: var(--border-accent);
  box-shadow: var(--shadow-glow);
}

main section[aria-labelledby="hero-title"] div[role="region"] li strong {
  display: block;
  font-size: 1.6rem;
  background: linear-gradient(120deg, #ffffff, #ff8fa3);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  margin-bottom: 0.2rem;
}

main section[aria-labelledby="hero-title"] figure {
  margin-top: 1.5rem;
  border-radius: var(--radius-md);
  overflow: hidden;
  border: 1px solid var(--border-color);
  box-shadow: var(--shadow-md);
  transition: transform var(--transition), box-shadow var(--transition);
}

main section[aria-labelledby="hero-title"] figure:hover {
  transform: scale(1.01);
  box-shadow: var(--shadow-lg);
}

main section[aria-labelledby="hero-title"] figure svg {
  width: 100%;
  height: auto;
}

main section[aria-labelledby="hero-title"] figcaption {
  padding: 0.7rem 1rem;
  font-size: 0.82rem;
  color: var(--text-muted);
  background: rgba(0, 0, 0, 0.25);
  text-align: center;
}

/* ===== Page directory nav ===== */
nav[aria-label="页面目录"] {
  background: var(--bg-card);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 1.4rem 1.6rem;
  box-shadow: var(--shadow-sm);
}

nav[aria-label="页面目录"] h2 {
  font-size: 1.1rem;
  margin-bottom: 1rem;
}

nav[aria-label="页面目录"] ul {
  display: flex;
  flex-wrap: wrap;
  gap: 0.55rem;
}

nav[aria-label="页面目录"] a {
  display: inline-block;
  padding: 0.4rem 0.95rem;
  border-radius: var(--radius-full);
  background: var(--bg-glass);
  border: 1px solid var(--border-color);
  color: var(--text-secondary);
  font-size: 0.88rem;
  transition: all var(--transition);
}

nav[aria-label="页面目录"] a:hover {
  color: #fff;
  background: var(--accent-gradient);
  border-color: transparent;
  transform: translateY(-2px);
  box-shadow: var(--shadow-glow);
}

/* ===== Lists inside articles ===== */
main section > article ul,
main section > article ol {
  padding-left: 0;
  margin-bottom: 0.75rem;
}

main section > article ul li,
main section > article ol li {
  position: relative;
  padding-left: 1.5rem;
  margin-bottom: 0.55rem;
  color: var(--text-secondary);
  font-size: 0.95rem;
}

main section > article ul li::before {
  content: "";
  position: absolute;
  left: 0.25rem;
  top: 0.62em;
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--accent-gradient);
  box-shadow: 0 0 8px rgba(233, 69, 96, 0.5);
}

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

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

main section > article ol li::before {
  content: counter(item);
  position: absolute;
  left: 0;
  top: 0.15em;
  width: 1.15rem;
  height: 1.15rem;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.7rem;
  font-weight: 700;
  color: #fff;
  background: var(--accent-gradient);
  border-radius: 50%;
  line-height: 1;
}

/* ===== Blockquote ===== */
blockquote {
  position: relative;
  margin: 1rem 0;
  padding: 1rem 1.25rem 1rem 2.75rem;
  background: var(--bg-glass);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border-left: 3px solid var(--accent);
  border-radius: var(--radius-sm);
  transition: all var(--transition);
}

blockquote:hover {
  background: var(--bg-glass-hover);
  transform: translateX(4px);
}

blockquote::before {
  content: "\201C";
  position: absolute;
  left: 0.75rem;
  top: 0.1rem;
  font-size: 2.6rem;
  line-height: 1;
  color: var(--accent);
  opacity: 0.55;
  font-family: Georgia, serif;
}

blockquote p {
  margin: 0;
  color: var(--text-secondary);
  font-style: italic;
}

/* ===== Article links ===== */
main section > article p > a {
  display: inline-block;
  font-weight: 600;
  padding: 0.15rem 0;
  border-bottom: 1px solid transparent;
  transition: all var(--transition);
}

main section > article p > a:hover {
  border-bottom-color: var(--accent);
  transform: translateX(3px);
}

/* ===== FAQ details ===== */
#faq details {
  background: var(--bg-card);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  margin-bottom: 0.85rem;
  overflow: hidden;
  transition: all var(--transition);
}

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

#faq details[open] {
  border-color: var(--border-accent);
  box-shadow: var(--shadow-md);
  background: rgba(26, 26, 46, 0.9);
}

#faq summary {
  cursor: pointer;
  padding: 1rem 1.4rem 1rem 2.75rem;
  font-weight: 600;
  color: var(--text-primary);
  font-size: 0.98rem;
  position: relative;
  list-style: none;
  transition: color var(--transition);
  user-select: none;
}

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

#faq summary::before {
  content: "+";
  position: absolute;
  left: 1rem;
  top: 50%;
  transform: translateY(-50%);
  width: 1.4rem;
  height: 1.4rem;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.1rem;
  font-weight: 400;
  color: var(--accent);
  background: var(--accent-soft);
  border-radius: 50%;
  transition: all var(--transition);
  line-height: 1;
}

#faq details[open] summary::before {
  content: "−";
  transform: translateY(-50%) rotate(180deg);
  background: var(--accent-gradient);
  color: #fff;
}

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

#faq details p {
  padding: 0 1.4rem 1.2rem 2.75rem;
  margin: 0;
  font-size: 0.93rem;
  color: var(--text-secondary);
  animation: fadeIn 0.35s ease;
}

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

/* ===== Contact / address ===== */
#contact address {
  font-style: normal;
}

#contact address ul li {
  padding: 0.6rem 0;
  border-bottom: 1px dashed var(--border-color);
}

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

#contact address a {
  font-weight: 600;
}

/* ===== Sitemap & links ===== */
main section[aria-labelledby="sitemap-title"] ul,
main section[aria-labelledby="links-title"] ul {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
  gap: 0.6rem;
}

main section[aria-labelledby="sitemap-title"] li,
main section[aria-labelledby="links-title"] li {
  padding: 0;
}

main section[aria-labelledby="sitemap-title"] li::before,
main section[aria-labelledby="links-title"] li::before {
  display: none;
}

main section[aria-labelledby="sitemap-title"] a,
main section[aria-labelledby="links-title"] a {
  display: block;
  padding: 0.6rem 1rem;
  background: var(--bg-glass);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  color: var(--text-secondary);
  font-size: 0.9rem;
  transition: all var(--transition);
}

main section[aria-labelledby="sitemap-title"] a:hover,
main section[aria-labelledby="links-title"] a:hover {
  color: #fff;
  background: var(--bg-glass-hover);
  border-color: var(--border-accent);
  transform: translateY(-2px);
  box-shadow: var(--shadow-sm);
}

/* ===== Footer ===== */
footer[role="contentinfo"] {
  position: relative;
  margin-top: 2rem;
  padding: 3rem 1.25rem 2rem;
  background: linear-gradient(180deg, rgba(26, 26, 46, 0.6) 0%, rgba(15, 15, 26, 0.95) 100%);
  border-top: 1px solid var(--border-color);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
}

footer[role="contentinfo"]::before {
  content: "";
  position: absolute;
  top: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 60%;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--accent), transparent);
  opacity: 0.6;
}

footer[role="contentinfo"] > section {
  max-width: var(--max-width);
  margin: 0 auto 1.5rem;
  padding-bottom: 1.25rem;
  border-bottom: 1px solid var(--border-color);
}

footer[role="contentinfo"] > section:last-of-type {
  border-bottom: none;
  margin-bottom: 1rem;
}

footer[role="contentinfo"] h2 {
  font-size: 1rem;
  margin-bottom: 0.6rem;
  padding-left: 0.85rem;
}

footer[role="contentinfo"] h2::before {
  width: 3px;
}

footer[role="contentinfo"] p {
  font-size: 0.88rem;
  color: var(--text-muted);
  margin-bottom: 0;
  max-width: 900px;
}

footer[role="contentinfo"] > p {
  max-width: var(--max-width);
  margin: 1.5rem auto 0;
  padding-top: 1.25rem;
  border-top: 1px solid var(--border-color);
  text-align: center;
}

footer[role="contentinfo"] small {
  font-size: 0.82rem;
  color: var(--text-muted);
  line-height: 1.9;
}

/* ===== Back to top ===== */
#back-to-top {
  position: fixed;
  right: 1.25rem;
  bottom: 1.25rem;
  z-index: 90;
  width: 48px;
  height: 48px;
  padding: 0;
  border: 1px solid var(--border-accent);
  border-radius: 50%;
  background: var(--accent-gradient);
  color: #fff;
  font-size: 0;
  cursor: pointer;
  box-shadow: var(--shadow-md), var(--shadow-glow);
  transition: all var(--transition);
  display: flex;
  align-items: center;
  justify-content: center;
}

#back-to-top::before {
  content: "↑";
  font-size: 1.3rem;
  font-weight: 700;
  line-height: 1;
}

#back-to-top:hover {
  transform: translateY(-4px) scale(1.08);
  box-shadow: var(--shadow-lg), 0 0 32px rgba(233, 69, 96, 0.5);
}

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

/* ===== Light mode overrides ===== */
body.light-mode {
  --bg-primary: #f4f5fa;
  --bg-secondary: #ffffff;
  --bg-tertiary: #eef0f8;
  --bg-card: rgba(255, 255, 255, 0.82);
  --bg-glass: rgba(0, 0, 0, 0.04);
  --bg-glass-hover: rgba(0, 0, 0, 0.07);
  --text-primary: #1a1a2e;
  --text-secondary: #4a4a63;
  --text-muted: #7a7a94;
  --border-color: rgba(0, 0, 0, 0.08);
  --border-accent: rgba(233, 69, 96, 0.4);
  --hero-gradient: linear-gradient(135deg, #ffffff 0%, #ffe6ea 40%, #f0e6ff 75%, #e6f0ff 100%);
  --shadow-sm: 0 2px 8px rgba(26, 26, 46, 0.08);
  --shadow-md: 0 8px 24px rgba(26, 26, 46, 0.1);
  --shadow-lg: 0 16px 48px rgba(26, 26, 46, 0.14);
  --shadow-glow: 0 0 24px rgba(233, 69, 96, 0.18);
  background-image:
    radial-gradient(ellipse at 15% 0%, rgba(233, 69, 96, 0.08) 0%, transparent 45%),
    radial-gradient(ellipse at 85% 10%, rgba(83, 52, 131, 0.1) 0%, transparent 50%),
    radial-gradient(ellipse at 50% 100%, rgba(15, 52, 96, 0.08) 0%, transparent 55%);
}

body.light-mode header[role="banner"] {
  background: rgba(255, 255, 255, 0.75);
}

body.light-mode h1 {
  background: linear-gradient(120deg, #1a1a2e 0%, #533483 50%, #e94560 100%);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

body.light-mode h3 {
  color: #1a1a2e;
}

body.light-mode main section[aria-labelledby="hero-title"] > p {
  color: #4a4a63;
}

body.light-mode main section[aria-labelledby="hero-title"] > p strong {
  color: #c72d47;
}

body.light-mode main section[aria-labelledby="hero-title"] div[role="region"] li {
  color: #4a4a63;
  background: rgba(255, 255, 255, 0.6);
}

body.light-mode main section[aria-labelledby="hero-title"] div[role="region"] li strong {
  background: linear-gradient(120deg, #1a1a2e, #e94560);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

body.light-mode footer[role="contentinfo"] {
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.6) 0%, rgba(244, 245, 250, 0.95) 100%);
}

body.light-mode #faq details[open] {
  background: rgba(255, 255, 255, 0.95);
}

/* ===== Responsive: tablet ===== */
@media (max-width: 960px) {
  header[role="banner"] > div {
    gap: 0.65rem;
  }

  header form[role="search"] {
    flex: 1 1 100%;
    order: 5;
    max-width: none;
  }

  main section[aria-labelledby="hero-title"] {
    padding: 2rem 1.5rem;
  }

  main section[aria-labelledby="hero-title"] div[role="region"] ul {
    grid-template-columns: repeat(2, 1fr);
  }
}

/* ===== Responsive: mobile ===== */
@media (max-width: 720px) {
  body {
    font-size: 15px;
  }

  header[role="banner"] > div {
    padding: 0.65rem 1rem;
  }

  header nav[aria-label="主导航"] {
    display: none;
    flex: 1 1 100%;
    order: 10;
    padding-top: 0.5rem;
    border-top: 1px solid var(--border-color);
    margin-top: 0.25rem;
  }

  header nav[aria-label="主导航"].is-open {
    display: block;
  }

  header nav[aria-label="主导航"] ul {
    flex-direction: column;
    align-items: stretch;
    gap: 0.15rem;
  }

  header nav[aria-label="主导航"] a {
    display: block;
    padding: 0.7rem 1rem;
    border-radius: var(--radius-sm);
  }

  #menu-toggle {
    display: inline-block;
    margin-left: auto;
  }

  #theme-toggle {
    display: none;
  }

  header form[role="search"] {
    order: 20;
  }

  main {
    padding: 1rem 1rem 2.5rem;
    gap: 1.75rem;
  }

  main section[aria-labelledby="hero-title"] {
    padding: 1.5rem 1.15rem;
    border-radius: var(--radius-md);
  }

  main section[aria-labelledby="hero-title"] div[role="region"] ul {
    grid-template-columns: repeat(2, 1fr);
    gap: 0.65rem;
  }

  main section[aria-labelledby="hero-title"] div[role="region"] li {
    padding: 0.8rem 0.6rem;
    font-size: 0.8rem;
  }

  main section[aria-labelledby="hero-title"] div[role="region"] li strong {
    font-size: 1.25rem;
  }

  main section > article {
    padding: 1.15rem 1.1rem;
    border-radius: var(--radius-md);
  }

  main section > article:hover {
    transform: none;
  }

  nav[aria-label="页面目录"] {
    padding: 1.1rem 1.1rem;
  }

  nav[aria-label="页面目录"] ul {
    gap: 0.45rem;
  }

  nav[aria-label="页面目录"] a {
    font-size: 0.82rem;
    padding: 0.35rem 0.8rem;
  }

  #faq summary {
    padding: 0.9rem 1rem 0.9rem 2.5rem;
    font-size: 0.92rem;
  }

  #faq details p {
    padding: 0 1rem 1rem 2.5rem;
    font-size: 0.88rem;
  }

  main section[aria-labelledby="sitemap-title"] ul,
  main section[aria-labelledby="links-title"] ul {
    grid-template-columns: repeat(2, 1fr);
    gap: 0.5rem;
  }

  main section[aria-labelledby="sitemap-title"] a,
  main section[aria-labelledby="links-title"] a {
    padding: 0.5rem 0.7rem;
    font-size: 0.82rem;
  }

  footer[role="contentinfo"] {
    padding: 2rem 1rem 1.5rem;
  }

  #back-to-top {
    width: 42px;
    height: 42px;
    right: 1rem;
    bottom: 1rem;
  }
}

@media (max-width: 400px) {
  main section[aria-labelledby="hero-title"] div[role="region"] ul {
    grid-template-columns: 1fr;
  }

  main section[aria-labelledby="sitemap-title"] ul,
  main section[aria-labelledby="links-title"] ul {
    grid-template-columns: 1fr;
  }

  header form[role="search"] button[type="submit"] {
    padding: 0.55rem 0.8rem;
  }
}

/* ===== 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;
  }
}

/* ===== Print ===== */
@media print {
  header[role="banner"],
  #back-to-top,
  nav[aria-label="页面目录"] {
    display: none;
  }

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

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