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

/* ===== 变量 & 重置 ===== */
:root {
  --c-primary: #6514ff;
  --c-accent: #bf00ff;
  --c-dark: #1c1726;
  --c-dark2: #261e38;
  --c-dark3: #332850;
  --c-light: #f0eaff;
  --c-muted: #9b8fc0;
  --c-text: #e8e0ff;
  --c-white: #ffffff;
  --c-border: rgba(101,20,255,0.35);
  --font-main: 'Exo', 'Segoe UI', system-ui, sans-serif;
  --font-mono: 'Roboto Mono', 'Courier New', monospace;
  --nav-h: 64px;
  --gap-xl: 64px;
  --gap-lg: 48px;
  --gap-md: 32px;
  --gap-sm: 20px;
  --gap-xs: 12px;
  --radius: 10px;
  --radius-lg: 18px;
  --max-w: 1200px;
  --transition: 220ms cubic-bezier(0.25,0.46,0.45,0.94);
}

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

html {
  font-size: 17px;
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-main);
  background: var(--c-dark);
  color: var(--c-text);
  line-height: 1.65;
  min-height: 100vh;
  overflow-x: hidden;
}

body.dark-bg { background: var(--c-dark); }

img { max-width: 100%; height: auto; display: block; }
a { color: var(--c-light); text-decoration: none; }
a:hover { color: var(--c-accent); }
ul { list-style: none; }

/* ===== 背景动画图案 ===== */
.site-wrap {
  position: relative;
  min-height: 100vh;
}
.site-wrap::before {
  content: '';
  position: fixed;
  inset: 0;
  background-image:
    radial-gradient(ellipse at 20% 20%, rgba(101,20,255,0.18) 0%, transparent 60%),
    radial-gradient(ellipse at 80% 80%, rgba(191,0,255,0.12) 0%, transparent 55%);
  pointer-events: none;
  z-index: 0;
  animation: bgPulse 8s ease-in-out infinite alternate;
}
@keyframes bgPulse {
  0% { opacity: 0.7; }
  100% { opacity: 1; }
}

/* ===== 几何装饰块 ===== */
.geo-block {
  display: block;
  width: 80px; height: 80px;
  background: linear-gradient(135deg, var(--c-primary), var(--c-accent));
  border-radius: 4px;
  transform: rotate(15deg);
  animation: geoSpin 12s linear infinite;
}
.geo-block-lg {
  display: block;
  width: 160px; height: 160px;
  background: linear-gradient(135deg, var(--c-primary) 0%, var(--c-accent) 100%);
  border-radius: 8px;
  transform: rotate(20deg);
  animation: geoSpin 18s linear infinite;
}
.geo-block-lg.geo-purple {
  background: linear-gradient(135deg, var(--c-primary), #3d0099);
}
.geo-block-lg.geo-muted {
  background: linear-gradient(135deg, var(--c-dark3), var(--c-primary));
  opacity: 0.5;
}
.geo-circle {
  display: block;
  width: 120px; height: 120px;
  border: 4px solid var(--c-accent);
  border-radius: 50%;
  animation: geoOrbit 10s linear infinite;
}
.geo-circle.geo-accent { border-color: var(--c-accent); }
.geo-line {
  display: block;
  width: 100%;
  height: 3px;
  background: linear-gradient(90deg, var(--c-primary), var(--c-accent), transparent);
}
@keyframes geoSpin {
  from { transform: rotate(0deg); }
  to { transform: rotate(360deg); }
}
@keyframes geoOrbit {
  from { transform: rotate(0deg) scale(1); }
  50% { transform: rotate(180deg) scale(1.1); }
  to { transform: rotate(360deg) scale(1); }
}

/* ===== 侧边固定导航 (aside > nav > ul > li > a) ===== */
.site-nav-aside {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  z-index: 100;
  background: rgba(28,23,38,0.97);
  border-top: 2px solid var(--c-primary);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--gap-xs);
  padding: 0 var(--gap-sm);
  height: var(--nav-h);
  backdrop-filter: blur(12px);
}

.site-nav-aside nav ul {
  display: flex;
  gap: 4px;
  flex-wrap: nowrap;
  overflow-x: auto;
  scrollbar-width: none;
}
.site-nav-aside nav ul::-webkit-scrollbar { display: none; }

.site-nav-aside nav ul li a {
  display: block;
  padding: 10px 10px;
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 500;
  color: var(--c-muted);
  white-space: nowrap;
  border-radius: 6px;
  transition: color var(--transition), background var(--transition);
  min-height: 44px;
  line-height: 24px;
}
.site-nav-aside nav ul li a:hover,
.site-nav-aside nav ul li a:focus {
  color: var(--c-accent);
  background: rgba(191,0,255,0.12);
}

.nav-brand {
  flex-shrink: 0;
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 700;
  color: var(--c-primary);
  letter-spacing: 0.05em;
  text-align: center;
  white-space: nowrap;
  padding: 0 var(--gap-xs);
}

.nav-search {
  flex-shrink: 0;
  display: flex;
  align-items: center;
}
.nav-search form {
  display: flex;
  gap: 4px;
}
.nav-search input {
  background: var(--c-dark2);
  border: 1px solid var(--c-border);
  border-radius: 6px;
  color: var(--c-text);
  font-family: var(--font-mono);
  font-size: 12px;
  padding: 8px 10px;
  width: 120px;
  min-height: 40px;
  outline: none;
  transition: border-color var(--transition);
}
.nav-search input:focus { border-color: var(--c-accent); }
.nav-search button {
  background: var(--c-primary);
  border: none;
  border-radius: 6px;
  color: #fff;
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 600;
  padding: 8px 12px;
  cursor: pointer;
  min-height: 40px;
  transition: background var(--transition);
}
.nav-search button:hover { background: var(--c-accent); }

/* ===== 主内容区偏移（避开底部导航）===== */
main { padding-bottom: calc(var(--nav-h) + 32px); position: relative; z-index: 1; }

/* ===== Hero（首页）===== */
.hero-section {
  min-height: 70vh;
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  justify-content: center;
  padding: var(--gap-xl) var(--gap-md) var(--gap-xl) var(--gap-md);
  position: relative;
  overflow: hidden;
  text-align: right;
}
.hero-bg-text {
  position: absolute;
  right: -0.05em;
  top: 50%;
  transform: translateY(-50%);
  font-family: var(--font-mono);
  font-size: clamp(120px, 22vw, 260px);
  font-weight: 700;
  color: rgba(101,20,255,0.08);
  letter-spacing: -0.05em;
  pointer-events: none;
  user-select: none;
  line-height: 1;
  animation: bgTextDrift 20s ease-in-out infinite alternate;
}
@keyframes bgTextDrift {
  0% { transform: translateY(-50%) translateX(0); }
  100% { transform: translateY(-50%) translateX(-20px); }
}
.hero-inner {
  position: relative;
  z-index: 2;
  max-width: 760px;
}
.hero-eyebrow {
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 500;
  color: var(--c-accent);
  letter-spacing: 0.15em;
  text-transform: uppercase;
  margin-bottom: var(--gap-sm);
  display: inline-block;
  border: 1px solid var(--c-accent);
  padding: 4px 12px;
  border-radius: 4px;
}
.hero-h1 {
  font-size: clamp(32px, 6vw, 72px);
  font-weight: 700;
  line-height: 1.1;
  color: var(--c-white);
  margin-bottom: var(--gap-sm);
  letter-spacing: -0.02em;
}
.hero-sub {
  font-size: clamp(16px, 2.2vw, 20px);
  color: var(--c-muted);
  margin-bottom: var(--gap-md);
  line-height: 1.6;
}
.hero-btn {
  display: inline-block;
  background: linear-gradient(135deg, var(--c-primary), var(--c-accent));
  color: #fff;
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 15px;
  padding: 14px 32px;
  border-radius: var(--radius);
  border: none;
  cursor: pointer;
  min-height: 48px;
  transition: transform var(--transition), box-shadow var(--transition);
  letter-spacing: 0.05em;
}
.hero-btn:hover {
  color: #fff;
  transform: translateY(-3px);
  box-shadow: 0 12px 40px rgba(191,0,255,0.4);
}

/* ===== 首页内容区 ===== */
.content-section {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: var(--gap-xl) var(--gap-md);
  display: grid;
  grid-template-columns: 1fr 280px;
  grid-template-rows: auto 1fr;
  gap: var(--gap-lg);
  align-items: start;
}
.section-deco {
  grid-column: 1 / -1;
  display: flex;
  justify-content: flex-end;
  margin-bottom: -32px;
}
.section-body {
  grid-column: 1;
  min-width: 0;
}
.home-aside {
  grid-column: 2;
}

/* ===== 精选文章区 ===== */
.feat-section {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: var(--gap-xl) var(--gap-md);
}
.feat-header {
  margin-bottom: var(--gap-lg);
  border-left: 5px solid var(--c-primary);
  padding-left: var(--gap-sm);
}
.feat-section > section {
  display: grid;
  grid-template-columns: auto 1fr auto;
  gap: var(--gap-sm);
  align-items: center;
  background: var(--c-dark2);
  border-radius: var(--radius);
  border-bottom: 3px solid var(--c-primary);
  padding: var(--gap-md);
  margin-bottom: var(--gap-md);
  position: relative;
  overflow: hidden;
  transition: border-color var(--transition), transform var(--transition);
  animation: cardIn 0.5s both;
  animation-delay: calc(var(--card-index) * 0.08s);
}
.feat-section > section::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0; bottom: 0;
  background: linear-gradient(135deg, rgba(101,20,255,0.04), transparent);
  pointer-events: none;
}
.feat-section > section:hover {
  border-color: var(--c-accent);
  transform: translateY(-4px);
}
@keyframes cardIn {
  from { opacity: 0; transform: translateY(24px); }
  to { opacity: 1; transform: translateY(0); }
}
.card-num {
  font-family: var(--font-mono);
  font-size: 32px;
  font-weight: 700;
  color: rgba(101,20,255,0.3);
  line-height: 1;
  min-width: 56px;
}
.feat-section > section h3 {
  font-size: clamp(17px, 2.5vw, 22px);
  font-weight: 600;
  color: var(--c-white);
  margin-bottom: 6px;
  grid-column: 2;
}
.feat-section > section h3 a { color: inherit; }
.feat-section > section h3 a:hover { color: var(--c-accent); }
.feat-section > section .subtitle {
  grid-column: 2;
  font-size: 14px;
  color: var(--c-muted);
  margin: 0;
}
.feat-section > section .card-date {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--c-muted);
  grid-column: 2;
}
.feat-section > section .card-cta {
  grid-column: 3;
  grid-row: 1 / 4;
  align-self: center;
  display: block;
  padding: 10px 18px;
  background: var(--c-dark3);
  border: 1px solid var(--c-border);
  border-radius: var(--radius);
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--c-light);
  white-space: nowrap;
  min-height: 44px;
  line-height: 24px;
  transition: background var(--transition), border-color var(--transition);
}
.feat-section > section .card-cta:hover {
  background: var(--c-primary);
  border-color: var(--c-primary);
  color: #fff;
}

/* ===== 导航索引区 ===== */
.nav-list-section {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: var(--gap-xl) var(--gap-md);
  display: grid;
  grid-template-columns: 1fr 320px;
  gap: var(--gap-md);
  align-items: start;
}
.nav-list-section h2,
.nav-list-section p.subtitle {
  grid-column: 1;
}
.index-deco {
  grid-column: 2;
  grid-row: 1 / 3;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--gap-md);
}
.index-aside {
  grid-column: 1;
}
.index-aside nav ul li {
  border-bottom: 1px solid var(--c-dark3);
}
.index-aside nav ul li a {
  display: block;
  padding: 14px 0;
  font-size: 16px;
  color: var(--c-text);
  min-height: 44px;
  transition: color var(--transition), padding-left var(--transition);
}
.index-aside nav ul li a:hover {
  color: var(--c-accent);
  padding-left: 12px;
}

/* ===== 快速链接（首页侧栏）===== */
.home-aside h2 {
  font-size: 20px;
  color: var(--c-white);
  margin-bottom: 8px;
}
.home-aside .subtitle {
  font-size: 13px;
  color: var(--c-muted);
  margin-bottom: var(--gap-sm);
}
.quick-links li {
  margin-bottom: 8px;
}
.quick-links li a {
  display: block;
  padding: 10px 14px;
  background: var(--c-dark2);
  border-left: 3px solid var(--c-primary);
  border-radius: 0 var(--radius) var(--radius) 0;
  font-size: 14px;
  color: var(--c-text);
  min-height: 44px;
  line-height: 24px;
  transition: background var(--transition), border-color var(--transition), color var(--transition);
}
.quick-links li a:hover {
  background: var(--c-dark3);
  border-color: var(--c-accent);
  color: var(--c-accent);
}

/* ===== 文章页 ===== */
.article-main, .about-main, .privacy-main { position: relative; }

.article-hero-section {
  display: grid;
  grid-template-columns: 1fr 380px;
  gap: var(--gap-lg);
  align-items: center;
  max-width: var(--max-w);
  margin: 0 auto;
  padding: var(--gap-xl) var(--gap-md) var(--gap-lg);
  min-height: 50vh;
}
.article-hero-inner { }
.art-eyebrow {
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 500;
  color: var(--c-accent);
  letter-spacing: 0.15em;
  border: 1px solid var(--c-accent);
  display: inline-block;
  padding: 3px 10px;
  border-radius: 4px;
  margin-bottom: var(--gap-sm);
}
.article-hero-section h1 {
  font-size: clamp(28px, 4.5vw, 54px);
  font-weight: 700;
  color: var(--c-white);
  line-height: 1.15;
  margin-bottom: var(--gap-sm);
  letter-spacing: -0.02em;
}
.article-meta {
  display: flex;
  gap: var(--gap-md);
  margin-bottom: var(--gap-sm);
}
.pub-date, .mod-date {
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--c-muted);
}
.article-lead {
  font-size: 17px;
  color: var(--c-muted);
  line-height: 1.65;
}
.article-hero-fig {
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--c-dark2);
  border-radius: var(--radius-lg);
  overflow: hidden;
  min-height: 240px;
  position: relative;
}
.art-placeholder {
  background: var(--c-dark2);
}
.article-hero-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  border-radius: var(--radius-lg);
}

/* 文章正文 + 侧栏 */
.article-body-section {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: var(--gap-md) var(--gap-md) var(--gap-xl);
  display: grid;
  grid-template-columns: 1fr 300px;
  gap: var(--gap-xl);
  align-items: start;
}
.article-content {
  min-width: 0;
}
.article-sidebar { }
.sidebar-block {
  background: var(--c-dark2);
  border-radius: var(--radius);
  border-bottom: 3px solid var(--c-primary);
  padding: var(--gap-md);
  margin-bottom: var(--gap-md);
}
.sidebar-block h2 {
  font-size: 18px;
  color: var(--c-white);
  margin-bottom: 6px;
}
.sidebar-block .subtitle {
  font-size: 13px;
  color: var(--c-muted);
  margin-bottom: var(--gap-sm);
}
.related-list li, .sidebar-nav nav ul li {
  border-bottom: 1px solid rgba(101,20,255,0.2);
}
.related-list li a, .sidebar-nav nav ul li a {
  display: block;
  padding: 10px 0;
  font-size: 14px;
  color: var(--c-text);
  min-height: 44px;
  line-height: 24px;
  transition: color var(--transition);
}
.related-list li a:hover, .sidebar-nav nav ul li a:hover { color: var(--c-accent); }
.related-list time {
  display: block;
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--c-muted);
}

/* 文章底部CTA */
.article-footer-section {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: var(--gap-lg) var(--gap-md);
}
.footer-deco { margin-bottom: var(--gap-md); }
.article-cta-aside {
  background: linear-gradient(135deg, var(--c-dark2), var(--c-dark3));
  border: 1px solid var(--c-border);
  border-radius: var(--radius-lg);
  padding: var(--gap-lg);
  text-align: center;
}
.article-cta-aside h2 {
  font-size: 28px;
  color: var(--c-white);
  margin-bottom: 8px;
}
.article-cta-aside .subtitle {
  color: var(--c-muted);
  margin-bottom: var(--gap-md);
}
.cta-links { display: flex; gap: var(--gap-sm); justify-content: center; flex-wrap: wrap; }
.cta-btn {
  display: inline-block;
  padding: 12px 28px;
  background: linear-gradient(135deg, var(--c-primary), var(--c-accent));
  color: #fff;
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 15px;
  border-radius: var(--radius);
  min-height: 48px;
  transition: transform var(--transition), box-shadow var(--transition);
}
.cta-btn:hover {
  color: #fff;
  transform: translateY(-3px);
  box-shadow: 0 10px 32px rgba(191,0,255,0.4);
}
.cta-secondary {
  background: var(--c-dark3);
  border: 1px solid var(--c-border);
}
.cta-secondary:hover {
  background: var(--c-dark2);
  box-shadow: 0 10px 32px rgba(101,20,255,0.2);
}

/* ===== 文章正文内容样式 ===== */
.article-content h2 {
  font-size: clamp(22px, 3vw, 30px);
  font-weight: 700;
  color: var(--c-white);
  margin: var(--gap-lg) 0 var(--gap-sm);
  padding-left: var(--gap-sm);
  border-left: 4px solid var(--c-primary);
}
.article-content h3 {
  font-size: clamp(18px, 2.5vw, 22px);
  font-weight: 600;
  color: var(--c-light);
  margin: var(--gap-md) 0 10px;
}
.article-content p {
  font-size: 17px;
  line-height: 1.75;
  color: var(--c-text);
  margin-bottom: var(--gap-sm);
}
.article-content ul, .article-content ol {
  margin: var(--gap-sm) 0;
  padding-left: 24px;
}
.article-content ul { list-style: disc; }
.article-content ol { list-style: decimal; }
.article-content li {
  font-size: 17px;
  line-height: 1.7;
  color: var(--c-text);
  margin-bottom: 8px;
}
.article-content a {
  color: var(--c-accent);
  text-decoration: underline;
  text-underline-offset: 3px;
}
.article-content a:hover { color: var(--c-light); }
.article-content strong { color: var(--c-white); font-weight: 600; }
.article-content em { color: var(--c-light); font-style: italic; }
.article-content blockquote {
  border-left: 4px solid var(--c-accent);
  padding: var(--gap-sm) var(--gap-md);
  margin: var(--gap-md) 0;
  background: rgba(191,0,255,0.06);
  border-radius: 0 var(--radius) var(--radius) 0;
  font-style: italic;
  color: var(--c-muted);
}
.article-content code {
  font-family: var(--font-mono);
  background: var(--c-dark3);
  padding: 2px 6px;
  border-radius: 4px;
  font-size: 15px;
  color: var(--c-accent);
}
.article-content pre {
  background: var(--c-dark2);
  border: 1px solid var(--c-border);
  border-radius: var(--radius);
  padding: var(--gap-md);
  overflow-x: auto;
  margin: var(--gap-md) 0;
}
.article-content pre code { background: none; padding: 0; }
.article-content table {
  width: 100%;
  border-collapse: collapse;
  margin: var(--gap-md) 0;
  font-size: 15px;
}
.article-content th {
  background: var(--c-dark3);
  color: var(--c-white);
  padding: 10px 14px;
  text-align: left;
  border-bottom: 2px solid var(--c-primary);
}
.article-content td {
  padding: 10px 14px;
  border-bottom: 1px solid var(--c-dark3);
  color: var(--c-text);
}
.article-content tr:hover td { background: rgba(101,20,255,0.05); }

/* ===== About 页 ===== */
.about-hero-section {
  display: grid;
  grid-template-columns: 1fr 300px;
  gap: var(--gap-lg);
  align-items: center;
  max-width: var(--max-w);
  margin: 0 auto;
  padding: var(--gap-xl) var(--gap-md) var(--gap-lg);
  min-height: 50vh;
}
.about-hero-fig {
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
}
.about-num {
  position: absolute;
  font-family: var(--font-mono);
  font-size: 80px;
  font-weight: 700;
  color: rgba(191,0,255,0.5);
}
.about-body-section {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: var(--gap-md) var(--gap-md) var(--gap-xl);
  display: grid;
  grid-template-columns: 1fr 280px;
  gap: var(--gap-xl);
  align-items: start;
}
.about-content { min-width: 0; }
.about-content h2 { font-size: clamp(20px,2.8vw,26px); font-weight:700; color:var(--c-white); margin: var(--gap-md) 0 8px; border-left:4px solid var(--c-primary); padding-left:12px; }
.about-content p { font-size:17px; line-height:1.75; color:var(--c-text); margin-bottom:var(--gap-sm); }
.about-content a { color:var(--c-accent); text-decoration:underline; }
.about-sidebar { }
.pick-list li { border-bottom:1px solid rgba(101,20,255,0.2); }
.pick-list li a { display:block; padding:10px 0; font-size:14px; color:var(--c-text); min-height:44px; line-height:24px; transition:color var(--transition); }
.pick-list li a:hover { color:var(--c-accent); }

.about-nav-section {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: var(--gap-lg) var(--gap-md);
  display: grid;
  grid-template-columns: 1fr 200px;
  gap: var(--gap-md);
}
.about-nav-section h2 { grid-column:1; font-size:clamp(20px,3vw,28px); color:var(--c-white); }
.about-nav-section .subtitle { grid-column:1; color:var(--c-muted); margin-bottom:var(--gap-sm); }
.nav-fig { grid-column:2; grid-row:1/4; display:flex; align-items:flex-start; justify-content:center; padding-top:var(--gap-sm); }
.about-nav-aside { grid-column:1; }
.about-nav-list li {
  border-bottom:1px solid var(--c-dark3);
  padding: 12px 0;
}
.about-nav-list li a { font-size:16px; color:var(--c-text); transition:color var(--transition); }
.about-nav-list li a:hover { color:var(--c-accent); }
.about-nav-list li span { display:block; font-size:13px; color:var(--c-muted); }

/* ===== Privacy 页 ===== */
.privacy-hero-section {
  display: grid;
  grid-template-columns: 1fr 280px;
  gap: var(--gap-lg);
  align-items: center;
  max-width: var(--max-w);
  margin: 0 auto;
  padding: var(--gap-xl) var(--gap-md) var(--gap-lg);
  min-height: 40vh;
}
.privacy-hero-fig { display:flex; align-items:center; justify-content:center; }
.privacy-body-section {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: var(--gap-md) var(--gap-md) var(--gap-xl);
  display: grid;
  grid-template-columns: 1fr 280px;
  gap: var(--gap-xl);
  align-items: start;
}
.privacy-content { min-width:0; }
.privacy-content h2 { font-size:clamp(19px,2.5vw,24px); font-weight:700; color:var(--c-white); margin:var(--gap-md) 0 8px; padding-left:12px; border-left:4px solid var(--c-primary); }
.privacy-content p { font-size:17px; line-height:1.75; color:var(--c-text); margin-bottom:var(--gap-sm); }
.privacy-content a { color:var(--c-accent); text-decoration:underline; }
.privacy-content ul { list-style:disc; padding-left:24px; margin-bottom:var(--gap-sm); }
.privacy-content li { font-size:17px; line-height:1.7; color:var(--c-text); margin-bottom:6px; }
.privacy-sidebar { }
.sidebar-text { font-size:14px; color:var(--c-muted); line-height:1.6; margin-bottom:var(--gap-sm); }
.sidebar-link {
  display:inline-block;
  padding:8px 16px;
  background: var(--c-primary);
  color:#fff;
  border-radius:var(--radius);
  font-size:14px;
  font-family:var(--font-mono);
  min-height:40px;
  line-height:24px;
  transition:background var(--transition);
}
.sidebar-link:hover { background:var(--c-accent); color:#fff; }
.privacy-extra-section {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: var(--gap-lg) var(--gap-md);
}
.extra-fig { margin-bottom:var(--gap-md); }
.privacy-extra-aside {
  background:var(--c-dark2);
  border-radius:var(--radius-lg);
  padding:var(--gap-lg);
}
.privacy-extra-aside h2 { font-size:22px; color:var(--c-white); margin-bottom:6px; }
.privacy-extra-aside .subtitle { color:var(--c-muted); margin-bottom:var(--gap-md); }
.extra-links li { border-bottom:1px solid var(--c-dark3); }
.extra-links li a { display:block; padding:12px 0; font-size:16px; color:var(--c-text); min-height:44px; line-height:20px; transition:color var(--transition), padding-left var(--transition); }
.extra-links li a:hover { color:var(--c-accent); padding-left:10px; }

/* ===== h2 + subtitle ===== */
h2 { font-size: clamp(22px, 3vw, 34px); font-weight: 700; color: var(--c-white); margin-bottom: 8px; }
.subtitle {
  font-size: 15px;
  color: var(--c-muted);
  line-height: 1.5;
  margin-bottom: var(--gap-md);
  display: block;
}

/* ===== 页脚 ===== */
.site-footer {
  background: var(--c-dark2);
  border-top: 2px solid var(--c-primary);
  padding: var(--gap-xl) var(--gap-md) calc(var(--nav-h) + 32px);
  position: relative;
  z-index: 1;
}
.footer-top {
  text-align: center;
  margin-bottom: var(--gap-xl);
  padding-bottom: var(--gap-lg);
  border-bottom: 1px solid var(--c-dark3);
}
.footer-brand {
  font-family: var(--font-mono);
  font-size: clamp(40px, 8vw, 80px);
  font-weight: 700;
  color: transparent;
  -webkit-text-stroke: 2px var(--c-primary);
  letter-spacing: -0.03em;
  line-height: 1;
}
.footer-cols {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--gap-lg);
  margin-bottom: var(--gap-xl);
  max-width: var(--max-w);
  margin-left: auto;
  margin-right: auto;
}
.footer-col h4 {
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 700;
  color: var(--c-accent);
  letter-spacing: 0.1em;
  margin-bottom: var(--gap-sm);
}
.footer-col nav ul li { border-bottom:1px solid var(--c-dark3); }
.footer-col nav ul li a {
  display: block;
  padding: 8px 0;
  font-size: 14px;
  color: var(--c-muted);
  min-height: 40px;
  line-height: 24px;
  transition: color var(--transition);
}
.footer-col nav ul li a:hover { color: var(--c-light); }
.footer-bar {
  max-width: var(--max-w);
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: var(--gap-md);
  border-top: 1px solid var(--c-dark3);
  flex-wrap: wrap;
  gap: var(--gap-sm);
}
.footer-bar nav ul {
  display: flex;
  gap: var(--gap-sm);
}
.footer-bar nav ul li a {
  font-size: 14px;
  color: var(--c-muted);
  min-height: 40px;
  display: inline-flex;
  align-items: center;
  padding: 4px 8px;
  border-radius: 4px;
  transition: color var(--transition);
}
.footer-bar nav ul li a:hover { color: var(--c-accent); }
.copyright {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--c-muted);
}

/* ===== 动效：prefers-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;
  }
  .site-wrap::before { animation: none; }
  .hero-bg-text { animation: none; }
}

/* ===== 响应式 ===== */
@media (max-width: 900px) {
  .content-section {
    grid-template-columns: 1fr;
  }
  .home-aside { grid-column: 1; }
  .section-deco { grid-column: 1; justify-content: flex-start; }

  .nav-list-section {
    grid-template-columns: 1fr;
  }
  .index-deco { grid-column: 1; grid-row: auto; justify-content: flex-start; }
  .index-aside { grid-column: 1; }

  .article-hero-section,
  .about-hero-section,
  .privacy-hero-section {
    grid-template-columns: 1fr;
    min-height: auto;
  }
  .article-hero-fig,
  .about-hero-fig,
  .privacy-hero-fig { display: none; }

  .article-body-section,
  .about-body-section,
  .privacy-body-section {
    grid-template-columns: 1fr;
  }
  .article-sidebar,
  .about-sidebar,
  .privacy-sidebar { order: -1; }

  .about-nav-section { grid-template-columns: 1fr; }
  .nav-fig { display: none; }

  .footer-cols { grid-template-columns: repeat(2, 1fr); }
  .feat-section > section {
    grid-template-columns: auto 1fr;
  }
  .feat-section > section .card-cta {
    grid-column: 1 / -1;
    grid-row: auto;
    text-align: center;
  }
}

@media (max-width: 600px) {
  :root { --gap-xl: 40px; --gap-lg: 32px; --gap-md: 20px; }

  .site-nav-aside {
    padding: 0 8px;
    gap: 4px;
  }
  .nav-brand { display: none; }
  .nav-search { display: none; }
  .site-nav-aside nav ul {
    gap: 0;
  }
  .site-nav-aside nav ul li a {
    padding: 8px 6px;
    font-size: 11px;
  }

  .hero-section {
    align-items: flex-start;
    text-align: left;
    padding: var(--gap-lg) var(--gap-md);
  }
  .hero-bg-text { font-size: 100px; opacity: 0.05; }

  .footer-cols { grid-template-columns: 1fr 1fr; gap: var(--gap-md); }
  .footer-brand { font-size: 40px; }

  .feat-section > section {
    grid-template-columns: 1fr;
  }
  .card-num { font-size: 22px; min-width: auto; }
  .feat-section > section .card-cta { grid-column: 1; }
}

@media (max-width: 400px) {
  .footer-cols { grid-template-columns: 1fr; }
}