@import url('https://fonts.googleapis.com/css2?family=Open+Sans:wght@300;400;500;600;700&family=Poppins:wght@400;500;600;700&display=swap');

/* ====== CSS 变量 ====== */
:root {
  --c-primary: #6514ff;
  --c-accent: #bf00ff;
  --c-dark: #1c1726;
  --c-dark-80: rgba(28,23,38,0.8);
  --c-primary-10: rgba(101,20,255,0.1);
  --c-primary-20: rgba(101,20,255,0.2);
  --c-accent-10: rgba(191,0,255,0.1);
  --c-white: #ffffff;
  --c-white-80: rgba(255,255,255,0.8);
  --c-white-10: rgba(255,255,255,0.1);
  --c-grey: #2e2540;
  --c-grey-light: #3d3355;
  --c-text: #f0eaff;
  --c-text-muted: rgba(240,234,255,0.6);
  --c-surface: #241e35;
  --c-card: #2a2240;
  --font-head: 'Poppins', 'Open Sans', system-ui, sans-serif;
  --font-body: 'Open Sans', system-ui, sans-serif;
  --gap-sm: 16px;
  --gap-md: 32px;
  --gap-lg: 48px;
  --gap-xl: 72px;
  --nav-h: 64px;
  --radius: 0px;
  --transition: 200ms ease;
}

/* ====== 重置 ====== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { font-size: 16px; scroll-behavior: smooth; }
body {
  font-family: var(--font-body);
  background: var(--c-dark);
  color: var(--c-text);
  line-height: 1.6;
  min-height: 100vh;
  padding-bottom: var(--nav-h);
  overflow-x: hidden;
}

/* ====== 全局排版 ====== */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-head);
  font-weight: 700;
  line-height: 1.2;
  color: var(--c-white);
}
h1 { font-size: clamp(2rem, 5vw, 3.5rem); }
h2 { font-size: clamp(1.5rem, 3.5vw, 2.25rem); }
h3 { font-size: clamp(1.1rem, 2.5vw, 1.5rem); }
p { font-size: 1rem; line-height: 1.7; color: var(--c-text); }
a { color: var(--c-accent); text-decoration: none; transition: color var(--transition); }
a:hover { color: var(--c-white); }
img { max-width: 100%; height: auto; display: block; }
ul, ol { list-style: none; }
time { font-size: 0.875rem; color: var(--c-text-muted); }

/* ====== 页面容器 ====== */
.page-wrapper { min-height: 100vh; display: flex; flex-direction: column; }
main { flex: 1; }

/* ====== 眉题 (eyebrow) ====== */
.eyebrow {
  display: inline-block;
  font-family: var(--font-head);
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--c-accent);
  margin-bottom: 8px;
}

/* ====== 徽章 ====== */
.badge {
  display: inline-block;
  background: linear-gradient(135deg, var(--c-primary), var(--c-accent));
  color: var(--c-white);
  font-family: var(--font-head);
  font-size: 0.75rem;
  font-weight: 600;
  padding: 4px 12px;
  border-radius: 2px;
  letter-spacing: 0.05em;
}
.badge-vs {
  background: var(--c-accent);
  font-size: 0.85rem;
  padding: 6px 16px;
}
.float-badge {
  position: absolute;
  top: 24px;
  right: 24px;
  animation: floatBadge 3s ease-in-out infinite;
}
@keyframes floatBadge {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-8px); }
}

/* ====== 按钮 ====== */
.btn-primary {
  display: inline-block;
  background: linear-gradient(135deg, var(--c-primary), var(--c-accent));
  color: var(--c-white);
  font-family: var(--font-head);
  font-weight: 600;
  font-size: 1rem;
  padding: 14px 32px;
  border-radius: 2px;
  cursor: pointer;
  transition: opacity var(--transition), transform var(--transition);
  min-height: 48px;
  line-height: 1.2;
}
.btn-primary:hover { opacity: 0.85; transform: translateY(-2px); color: var(--c-white); }
.btn-ghost {
  display: inline-block;
  background: transparent;
  color: var(--c-white);
  font-family: var(--font-head);
  font-weight: 600;
  font-size: 1rem;
  padding: 13px 32px;
  border-radius: 2px;
  border: 2px solid var(--c-white-80);
  cursor: pointer;
  transition: background var(--transition), color var(--transition);
  min-height: 48px;
  line-height: 1.2;
}
.btn-ghost:hover { background: var(--c-white-10); color: var(--c-white); }

/* ====== 背景动态纹理 ====== */
.hero-pattern {
  position: absolute;
  inset: 0;
  pointer-events: none;
  overflow: hidden;
  z-index: 0;
}
.hero-pattern::before {
  content: '';
  position: absolute;
  width: 600px;
  height: 600px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(191,0,255,0.15) 0%, transparent 70%);
  top: -200px;
  right: -100px;
  animation: bgPulse 6s ease-in-out infinite;
}
.hero-pattern::after {
  content: '';
  position: absolute;
  width: 400px;
  height: 400px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(101,20,255,0.2) 0%, transparent 70%);
  bottom: -150px;
  left: -80px;
  animation: bgPulse 8s ease-in-out infinite reverse;
}
@keyframes bgPulse {
  0%, 100% { transform: scale(1); opacity: 1; }
  50% { transform: scale(1.1); opacity: 0.7; }
}

/* ====== 首页 Hero ====== */
.hero-section {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  background: linear-gradient(135deg, var(--c-dark) 0%, #2d1a4e 50%, var(--c-dark) 100%);
  overflow: hidden;
  padding: var(--gap-lg) var(--gap-md);
}
.hero-inner {
  position: relative;
  z-index: 1;
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--gap-lg);
  align-items: center;
}
.hero-text {
  display: flex;
  flex-direction: column;
  gap: var(--gap-sm);
  text-align: right;
}
.hero-text h1 {
  font-size: clamp(2.5rem, 6vw, 4rem);
  background: linear-gradient(135deg, var(--c-white) 0%, var(--c-accent) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.hero-desc {
  font-size: 1.1rem;
  color: var(--c-text-muted);
  max-width: 480px;
  margin-left: auto;
}
.hero-cta {
  display: flex;
  gap: var(--gap-sm);
  flex-wrap: wrap;
  justify-content: flex-end;
  margin-top: 8px;
}
.hero-media {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
}
.hero-icon-block {
  position: relative;
  width: 240px;
  height: 240px;
  background: linear-gradient(135deg, var(--c-primary), var(--c-accent));
  display: flex;
  align-items: center;
  justify-content: center;
}
.hero-img {
  width: 100%;
  height: auto;
  object-fit: cover;
}
.big-icon {
  font-size: 5rem;
  display: block;
  text-align: center;
}

/* ====== 内页 Hero 通用 ====== */
.page-hero {
  position: relative;
  background: linear-gradient(135deg, var(--c-dark) 0%, #2d1a4e 60%, #1c1726 100%);
  overflow: hidden;
  padding: var(--gap-xl) var(--gap-md) var(--gap-lg);
}
.ranking-hero-inner,
.compare-hero-inner,
.review-hero-inner,
.faq-hero-inner,
.about-hero-inner,
.privacy-hero-inner,
.default-hero-inner {
  position: relative;
  z-index: 1;
  max-width: 900px;
  margin: 0 auto;
}
.ranking-hero { border-bottom: 3px solid var(--c-primary); }
.ranking-hero-inner { display: flex; flex-direction: column; gap: 16px; }
.ranking-meta { display: flex; gap: 16px; align-items: center; flex-wrap: wrap; }
.pub-date { font-size: 0.875rem; color: var(--c-text-muted); }

.compare-hero { border-bottom: 3px solid var(--c-accent); }
.compare-hero-inner { display: flex; flex-direction: column; gap: 16px; position: relative; }
.compare-vs-badge { margin-bottom: 8px; }

.review-hero { border-bottom: 3px solid var(--c-primary); }
.review-hero-inner {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: var(--gap-md);
  align-items: center;
  position: relative;
  z-index: 1;
  max-width: 1000px;
  margin: 0 auto;
}
.review-hero-media {
  width: 180px;
  height: 180px;
  background: var(--c-primary-20);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  overflow: hidden;
}
.review-hero-img { width: 100%; height: 100%; object-fit: cover; }
.review-hero-text { display: flex; flex-direction: column; gap: 12px; }
.review-meta-row { display: flex; gap: 16px; align-items: center; flex-wrap: wrap; }
.meta-item { font-size: 0.875rem; color: var(--c-text-muted); }

.faq-hero { border-bottom: 3px solid var(--c-accent); }
.faq-hero-inner {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: var(--gap-md);
  align-items: center;
  position: relative;
  z-index: 1;
  max-width: 900px;
  margin: 0 auto;
}
.faq-icon { font-size: 4rem; flex-shrink: 0; }
.faq-hero-text { display: flex; flex-direction: column; gap: 12px; }

.about-hero { border-bottom: 3px solid var(--c-primary); }
.about-hero-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: var(--gap-md);
  position: relative;
  z-index: 1;
  max-width: 1000px;
  margin: 0 auto;
}
.about-hero-text { flex: 1; display: flex; flex-direction: column; gap: 12px; }
.about-hero-deco { position: relative; flex-shrink: 0; }

.privacy-hero { border-bottom: 2px solid var(--c-grey-light); }
.privacy-hero-inner { display: flex; flex-direction: column; gap: 12px; position: relative; z-index: 1; }

.page-intro {
  font-size: 1.1rem;
  color: var(--c-text-muted);
  line-height: 1.7;
  max-width: 720px;
}

/* ====== 内容区域布局 ====== */
.content-section {
  padding: var(--gap-lg) var(--gap-md);
  max-width: 1200px;
  margin: 0 auto;
  width: 100%;
}
.content-layout {
  display: grid;
  grid-template-columns: 260px 1fr;
  gap: var(--gap-lg);
  align-items: start;
}

/* ====== 侧边栏（左侧）====== */
.sidebar {
  position: sticky;
  top: 24px;
}
.aside-inner {
  background: var(--c-card);
  padding: var(--gap-md);
  display: flex;
  flex-direction: column;
  gap: 12px;
  border-left: 3px solid var(--c-primary);
}
.aside-inner h3 {
  font-size: 1rem;
  color: var(--c-white);
  margin-top: 8px;
}
.aside-sub { margin-top: 16px; }
.aside-inner dl { display: flex; flex-direction: column; gap: 8px; }
.aside-inner dt, .aside-inner dd { margin: 0; }
.aside-inner dt a, .aside-inner dd a {
  display: block;
  font-size: 0.875rem;
  color: var(--c-text-muted);
  padding: 6px 8px;
  border-left: 2px solid transparent;
  transition: color var(--transition), border-color var(--transition), background var(--transition);
  line-height: 1.4;
}
.aside-inner dt a:hover, .aside-inner dd a:hover {
  color: var(--c-white);
  border-left-color: var(--c-accent);
  background: var(--c-primary-10);
}
.aside-list { display: flex; flex-direction: column; gap: 6px; }
.aside-list li a {
  display: block;
  font-size: 0.875rem;
  color: var(--c-text-muted);
  padding: 5px 8px;
  transition: color var(--transition);
}
.aside-list li a:hover { color: var(--c-white); }

/* ====== 主内容 ====== */
.main-content {
  display: flex;
  flex-direction: column;
  gap: var(--gap-md);
}
.main-content > h2 {
  padding-bottom: 16px;
  border-bottom: 2px solid var(--c-primary-20);
}
.update-note, .meta-note {
  font-size: 0.875rem;
  color: var(--c-text-muted);
}

/* ====== 正文 (prose) ====== */
.prose {
  font-size: 1rem;
  line-height: 1.8;
  color: var(--c-text);
}
.prose h2 {
  font-size: 1.5rem;
  margin-top: var(--gap-md);
  margin-bottom: 12px;
  color: var(--c-white);
}
.prose h3 {
  font-size: 1.2rem;
  margin-top: var(--gap-sm);
  margin-bottom: 10px;
  color: var(--c-accent);
}
.prose p { margin-bottom: 16px; }
.prose ul, .prose ol {
  margin: 16px 0;
  padding-left: 20px;
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.prose ul { list-style: disc; }
.prose ol { list-style: decimal; }
.prose li { color: var(--c-text); }
.prose a { color: var(--c-accent); }
.prose a:hover { color: var(--c-white); }
.prose strong { color: var(--c-white); font-weight: 600; }
.prose blockquote {
  border-left: 4px solid var(--c-primary);
  padding: 12px 16px;
  margin: 16px 0;
  background: var(--c-primary-10);
  font-style: italic;
}
.prose table {
  width: 100%;
  border-collapse: collapse;
  margin: var(--gap-md) 0;
  font-size: 0.9rem;
}
.prose th {
  background: var(--c-primary);
  color: var(--c-white);
  padding: 10px 14px;
  text-align: left;
  font-weight: 600;
}
.prose td {
  padding: 10px 14px;
  border-bottom: 1px solid var(--c-grey);
  color: var(--c-text);
}
.prose tr:hover td { background: var(--c-primary-10); }

/* FAQ 特殊样式 */
.faq-prose h2 { color: var(--c-accent); }

/* ====== 首页子页列表 ====== */
.children-section {
  background: var(--c-surface);
  padding: var(--gap-lg) var(--gap-md);
}
.section-header {
  max-width: 1200px;
  margin: 0 auto var(--gap-md);
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.child-list {
  max-width: 1200px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: var(--gap-md);
  list-style: none;
}
.child-card {
  background: var(--c-card);
  border-top: 3px solid var(--c-primary);
  transition: transform var(--transition), border-color var(--transition);
}
.child-card:hover { transform: translateY(-4px); border-top-color: var(--c-accent); }
.child-card a {
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding: var(--gap-md);
  color: var(--c-text);
  height: 100%;
}
.child-card a:hover { color: var(--c-text); }
.card-index {
  font-family: var(--font-head);
  font-size: 2rem;
  font-weight: 700;
  color: var(--c-primary);
  line-height: 1;
}
.child-card strong {
  font-family: var(--font-head);
  font-size: 1rem;
  font-weight: 600;
  color: var(--c-white);
  line-height: 1.4;
}
.card-desc { font-size: 0.875rem; color: var(--c-text-muted); line-height: 1.5; }
.card-date { font-size: 0.8rem; color: var(--c-text-muted); margin-top: auto; }

/* ====== 底部导航（固定条）====== */
.bottom-nav {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  z-index: 100;
  background: var(--c-dark);
  border-top: 2px solid var(--c-primary);
  height: var(--nav-h);
  display: flex;
  align-items: center;
}
.bottom-nav dl {
  width: 100%;
  max-width: 1400px;
  margin: 0 auto;
  padding: 0 var(--gap-sm);
  display: flex;
  align-items: center;
  gap: 4px;
  overflow-x: auto;
  scrollbar-width: none;
}
.bottom-nav dl::-webkit-scrollbar { display: none; }
.bottom-nav dt, .bottom-nav dd { margin: 0; flex-shrink: 0; }
.nav-brand a {
  font-family: var(--font-head);
  font-size: 1rem;
  font-weight: 700;
  color: var(--c-white);
  padding: 12px 16px;
  display: block;
  white-space: nowrap;
  min-height: 40px;
  line-height: 1.2;
  display: flex;
  align-items: center;
}
.nav-brand a:hover { color: var(--c-accent); }
.bottom-nav dd a {
  display: flex;
  align-items: center;
  font-size: 0.8rem;
  color: var(--c-text-muted);
  padding: 10px 12px;
  white-space: nowrap;
  min-height: 40px;
  transition: color var(--transition), background var(--transition);
}
.bottom-nav dd a:hover { color: var(--c-white); background: var(--c-primary-10); }
.nav-cta-wrap { margin-left: auto; }
.nav-cta {
  display: flex;
  align-items: center;
  background: linear-gradient(135deg, var(--c-primary), var(--c-accent));
  color: var(--c-white);
  font-family: var(--font-head);
  font-weight: 600;
  font-size: 0.875rem;
  padding: 10px 20px;
  min-height: 40px;
  white-space: nowrap;
  transition: opacity var(--transition);
}
.nav-cta:hover { opacity: 0.85; color: var(--c-white); }

/* ====== 页脚 ====== */
footer {
  background: var(--c-dark);
  border-top: 1px solid var(--c-grey);
  padding: var(--gap-md) var(--gap-md);
  display: flex;
  flex-direction: column;
  gap: 8px;
  max-width: 100%;
}
.footer-brand {
  font-family: var(--font-head);
  font-weight: 600;
  font-size: 1rem;
  color: var(--c-white);
}
.footer-brand a { color: var(--c-accent); }
.footer-brand a:hover { color: var(--c-white); }
.footer-copy {
  font-size: 0.8rem;
  color: var(--c-text-muted);
}
.footer-copy a { color: var(--c-text-muted); }
.footer-copy a:hover { color: var(--c-white); }

/* ====== Reveal 动效 ====== */
.reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 300ms ease, transform 300ms ease;
}
.reveal.is-visible {
  opacity: 1;
  transform: translateY(0);
}
.stagger-0 { transition-delay: 0ms; }
.stagger-1 { transition-delay: 60ms; }
.stagger-2 { transition-delay: 120ms; }
.stagger-3 { transition-delay: 180ms; }
.stagger-4 { transition-delay: 240ms; }
.stagger-5 { transition-delay: 300ms; }

@media (prefers-reduced-motion: reduce) {
  .reveal { opacity: 1; transform: none; transition: none; }
  .float-badge { animation: none; }
  .hero-pattern::before, .hero-pattern::after { animation: none; }
}

/* ====== 响应式 ====== */
@media (max-width: 900px) {
  .hero-inner {
    grid-template-columns: 1fr;
    text-align: left;
  }
  .hero-text { text-align: left; }
  .hero-desc { margin-left: 0; }
  .hero-cta { justify-content: flex-start; }
  .hero-media { display: none; }
  .review-hero-inner {
    grid-template-columns: 1fr;
  }
  .review-hero-media { width: 100%; height: 160px; }
  .faq-hero-inner {
    grid-template-columns: 1fr;
  }
  .faq-icon { display: none; }
  .about-hero-inner { flex-direction: column; }
  .about-hero-deco { display: none; }
  .content-layout {
    grid-template-columns: 1fr;
  }
  .sidebar { position: static; }
}

@media (max-width: 600px) {
  :root {
    --gap-lg: 36px;
    --gap-xl: 48px;
    --gap-md: 24px;
  }
  .hero-section {
    padding: var(--gap-md) var(--gap-sm);
    min-height: 100vh;
  }
  .page-hero { padding: var(--gap-lg) var(--gap-sm) var(--gap-md); }
  .content-section { padding: var(--gap-md) var(--gap-sm); }
  .children-section { padding: var(--gap-md) var(--gap-sm); }
  .child-list { grid-template-columns: 1fr; gap: var(--gap-sm); }
  .bottom-nav dl { gap: 0; }
  .bottom-nav dd a { padding: 10px 8px; font-size: 0.75rem; }
  .nav-brand a { padding: 10px 12px; font-size: 0.9rem; }
  .nav-cta { padding: 10px 14px; font-size: 0.8rem; }
  footer { padding: var(--gap-sm); }
  .prose table { font-size: 0.8rem; }
  .prose th, .prose td { padding: 8px 10px; }
  .float-badge { top: 12px; right: 12px; }
}

@media (max-width: 375px) {
  h1 { font-size: 1.8rem; }
  .hero-section { min-height: 100dvh; }
}