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

/* ========== 基础变量 ========== */
:root {
  --clr-primary: #69ff69;
  --clr-accent: #00ffff;
  --clr-dark: #172617;
  --clr-dark2: #1e341e;
  --clr-dark3: #243424;
  --clr-chrome1: #b8ffb8;
  --clr-chrome2: #80ffe8;
  --clr-glow-g: rgba(105, 255, 105, 0.35);
  --clr-glow-c: rgba(0, 255, 255, 0.3);
  --clr-text: #d4f5d4;
  --clr-text-dim: #8bbf8b;
  --clr-border: rgba(105, 255, 105, 0.2);
  --clr-card-bg: rgba(30, 52, 30, 0.7);
  --clr-glass: rgba(23, 38, 23, 0.85);
  --font-main: 'IBM Plex Sans', 'PingFang SC', 'Microsoft YaHei', system-ui, sans-serif;
  --nav-w: 240px;
  --aside-w: 220px;
  --radius-card: 4px;
  --radius-btn: 3px;
  --transition: 0.22s ease;
}

/* ========== Reset ========== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: var(--font-main);
  background: var(--clr-dark);
  color: var(--clr-text);
  font-size: 17px;
  line-height: 1.7;
  min-height: 100vh;
  overflow-x: hidden;
}
body::before {
  content: '';
  position: fixed;
  inset: 0;
  background:
    radial-gradient(ellipse 60% 40% at 20% 80%, rgba(105,255,105,0.07) 0%, transparent 60%),
    radial-gradient(ellipse 50% 35% at 80% 20%, rgba(0,255,255,0.06) 0%, transparent 55%),
    repeating-linear-gradient(
      0deg,
      transparent,
      transparent 60px,
      rgba(105,255,105,0.02) 60px,
      rgba(105,255,105,0.02) 61px
    );
  pointer-events: none;
  z-index: 0;
}
img { max-width: 100%; height: auto; display: block; border-radius: var(--radius-card); }
a { color: var(--clr-primary); text-decoration: none; transition: color var(--transition); }
a:hover { color: var(--clr-accent); }
ul { list-style: none; }
button, input, label { font-family: inherit; }

/* ========== 布局骨架 ========== */
.site-wrapper {
  display: flex;
  align-items: stretch;
  min-height: 100vh;
  position: relative;
  z-index: 1;
}

/* ========== 侧边导航 aside > nav > ul > li > a ========== */
.site-aside {
  width: var(--nav-w);
  flex-shrink: 0;
  background: var(--clr-glass);
  border-right: 1px solid var(--clr-border);
  position: sticky;
  top: 0;
  height: 100vh;
  overflow-y: auto;
  display: flex;
  flex-direction: column;
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  scrollbar-width: thin;
  scrollbar-color: var(--clr-primary) transparent;
}
.site-aside::-webkit-scrollbar { width: 4px; }
.site-aside::-webkit-scrollbar-thumb { background: var(--clr-primary); border-radius: 2px; }

.site-aside nav {
  display: flex;
  flex-direction: column;
  padding: 1.5rem 0 2rem;
  flex: 1;
}

.nav-brand-wrap {
  padding: 0 1.2rem 1.5rem;
  border-bottom: 1px solid var(--clr-border);
  margin-bottom: 1rem;
}

.nav-brand {
  font-size: 1rem;
  font-weight: 700;
  letter-spacing: 0.03em;
  color: var(--clr-primary);
  display: block;
  line-height: 1.4;
  text-shadow: 0 0 12px var(--clr-glow-g);
  transition: text-shadow var(--transition);
}
.nav-brand:hover {
  text-shadow: 0 0 20px var(--clr-glow-g), 0 0 40px var(--clr-glow-c);
  color: var(--clr-accent);
}

.site-aside nav ul {
  display: flex;
  flex-direction: column;
  gap: 0;
  padding: 0;
}

.site-aside nav ul li a {
  display: block;
  padding: 0.65rem 1.2rem;
  font-size: 0.82rem;
  font-weight: 400;
  color: var(--clr-text-dim);
  line-height: 1.4;
  border-left: 2px solid transparent;
  transition: all var(--transition);
  min-height: 40px;
  display: flex;
  align-items: center;
}
.site-aside nav ul li a:hover,
.site-aside nav ul li a[aria-current="page"] {
  color: var(--clr-primary);
  border-left-color: var(--clr-primary);
  background: rgba(105,255,105,0.06);
  text-shadow: 0 0 8px var(--clr-glow-g);
}

/* ========== 主体区域 ========== */
.page-body {
  flex: 1;
  min-width: 0;
  display: flex;
  flex-direction: column;
}

/* ========== main > div > section 骨架 ========== */
.home-main,
.article-main,
.about-main,
.privacy-main,
.default-main {
  flex: 1;
  display: flex;
  gap: 2rem;
  padding: 2.5rem 2rem 3rem;
  max-width: 1200px;
  width: 100%;
  margin: 0 auto;
  align-items: flex-start;
}

/* ========== 内容侧边栏 aside ========== */
.content-aside {
  width: var(--aside-w);
  flex-shrink: 0;
  position: sticky;
  top: 1.5rem;
  display: flex;
  flex-direction: column;
  gap: 1.2rem;
}

.aside-block {
  background: var(--clr-card-bg);
  border: 1px solid var(--clr-border);
  border-radius: var(--radius-card);
  padding: 1.1rem 1rem;
  backdrop-filter: blur(8px);
}

.aside-block h3 {
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  color: var(--clr-accent);
  text-transform: uppercase;
  margin-bottom: 0.8rem;
  text-shadow: 0 0 8px var(--clr-glow-c);
}

.aside-block h3 span { display: inline; }

.aside-nav-list { display: flex; flex-direction: column; gap: 0.2rem; }
.aside-nav-list li a {
  display: block;
  padding: 0.35rem 0;
  font-size: 0.8rem;
  color: var(--clr-text-dim);
  border-bottom: 1px solid transparent;
  min-height: 40px;
  display: flex;
  align-items: center;
  line-height: 1.4;
  transition: color var(--transition);
}
.aside-nav-list li a:hover { color: var(--clr-primary); }

.aside-info-list { display: flex; flex-direction: column; gap: 0.4rem; }
.aside-info-list li {
  font-size: 0.8rem;
  color: var(--clr-text-dim);
  line-height: 1.5;
}
.aside-info-list li a { font-size: 0.8rem; }

.aside-about p { font-size: 0.82rem; color: var(--clr-text-dim); line-height: 1.6; margin-bottom: 0.7rem; }

.aside-link {
  display: inline-block;
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--clr-accent);
  border-bottom: 1px solid var(--clr-accent);
  padding-bottom: 1px;
  min-height: 40px;
  line-height: 40px;
}
.aside-link:hover { color: var(--clr-primary); border-color: var(--clr-primary); }

/* ========== Hero（首页）========== */
.hero-section {
  min-height: 70vh;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 4rem 2rem;
  position: relative;
  border-bottom: 1px solid var(--clr-border);
  background:
    linear-gradient(160deg, rgba(105,255,105,0.05) 0%, transparent 50%),
    linear-gradient(320deg, rgba(0,255,255,0.05) 0%, transparent 50%);
}

.hero-inner { max-width: 680px; }

.hero-eyebrow {
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.2em;
  color: var(--clr-accent);
  text-transform: uppercase;
  margin-bottom: 1.2rem;
  text-shadow: 0 0 10px var(--clr-glow-c);
}

.hero-h1 {
  font-size: clamp(2rem, 5vw, 3.8rem);
  font-weight: 700;
  line-height: 1.2;
  margin-bottom: 1.2rem;
  background: linear-gradient(135deg, var(--clr-primary) 0%, var(--clr-accent) 50%, var(--clr-chrome1) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  filter: drop-shadow(0 0 20px var(--clr-glow-g));
  letter-spacing: -0.01em;
}

.hero-sub {
  font-size: 1.05rem;
  color: var(--clr-text-dim);
  line-height: 1.7;
  margin-bottom: 2rem;
  font-weight: 300;
}

.hero-cta {
  display: inline-block;
  padding: 0.75rem 2rem;
  min-height: 48px;
  line-height: 1;
  font-size: 0.9rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  color: var(--clr-dark);
  background: linear-gradient(135deg, var(--clr-primary) 0%, var(--clr-accent) 100%);
  border-radius: var(--radius-btn);
  border: none;
  cursor: pointer;
  position: relative;
  overflow: hidden;
  transition: all var(--transition);
  box-shadow: 0 0 20px var(--clr-glow-g), 0 4px 16px rgba(0,0,0,0.4);
  display: inline-flex;
  align-items: center;
}
.hero-cta::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(255,255,255,0.25) 0%, transparent 50%);
  opacity: 0;
  transition: opacity var(--transition);
}
.hero-cta:hover {
  color: var(--clr-dark);
  box-shadow: 0 0 32px var(--clr-glow-g), 0 0 60px var(--clr-glow-c), 0 8px 24px rgba(0,0,0,0.5);
  transform: translateY(-2px);
}
.hero-cta:hover::before { opacity: 1; }

/* ========== 首页主体 ========== */
.home-article {
  flex: 1;
  min-width: 0;
  display: flex;
  flex-direction: column;
  gap: 3rem;
}

.content-section.prose-section { order: -1; }

/* ========== 通用 section 标题 ========== */
.cards-section h2,
.recent-section h2,
.about-articles-sec h2,
.about-nav-sec h2,
.related-block h2,
.privacy-links-sec h2,
.default-nav-sec h2 {
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.18em;
  color: var(--clr-accent);
  text-transform: uppercase;
  margin-bottom: 1.2rem;
  text-shadow: 0 0 8px var(--clr-glow-c);
  display: flex;
  align-items: center;
  gap: 0.6rem;
}
.cards-section h2::before,
.recent-section h2::before,
.about-articles-sec h2::before,
.about-nav-sec h2::before,
.related-block h2::before,
.privacy-links-sec h2::before,
.default-nav-sec h2::before {
  content: '';
  display: block;
  width: 24px;
  height: 2px;
  background: linear-gradient(90deg, var(--clr-primary), var(--clr-accent));
}

/* ========== 卡片（feature-grid）========== */
.feature-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1rem;
}

.feature-card {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  padding: 1.2rem 1.1rem;
  background: var(--clr-card-bg);
  border: 1px solid var(--clr-border);
  border-radius: var(--radius-card);
  backdrop-filter: blur(10px);
  transition: all var(--transition);
  position: relative;
  overflow: hidden;
}
.feature-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--clr-primary), var(--clr-accent));
  opacity: 0;
  transition: opacity var(--transition);
}
.feature-card:hover {
  border-color: rgba(105,255,105,0.4);
  box-shadow: 0 4px 24px rgba(105,255,105,0.15), 0 2px 8px rgba(0,0,0,0.4);
  transform: translateY(-3px);
  color: var(--clr-text);
}
.feature-card:hover::before { opacity: 1; }

.feature-card strong {
  font-size: 0.92rem;
  font-weight: 600;
  color: var(--clr-primary);
  line-height: 1.4;
  display: block;
}
.feature-card .card-desc {
  font-size: 0.8rem;
  color: var(--clr-text-dim);
  line-height: 1.5;
  flex: 1;
}
.feature-card .card-date {
  font-size: 0.72rem;
  color: rgba(139,191,139,0.6);
  font-weight: 300;
}

/* ========== 近期列表 ========== */
.recent-list { display: flex; flex-direction: column; gap: 0; }

.recent-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.8rem 0;
  border-bottom: 1px solid var(--clr-border);
  color: var(--clr-text);
  transition: all var(--transition);
  min-height: 48px;
}
.recent-item:last-child { border-bottom: none; }
.recent-item:hover { color: var(--clr-primary); padding-left: 0.4rem; }

.recent-item strong {
  font-size: 0.88rem;
  font-weight: 500;
  flex: 1;
  line-height: 1.4;
}
.recent-item span {
  font-size: 0.72rem;
  color: var(--clr-text-dim);
  white-space: nowrap;
  font-weight: 300;
}

/* ========== 文章页 ========== */
.article-wrap {
  flex: 1;
  min-width: 0;
  display: flex;
  flex-direction: column;
  gap: 2.5rem;
}

.breadcrumb-row {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  margin-bottom: 1rem;
  font-size: 0.78rem;
}
.breadcrumb-link { color: var(--clr-text-dim); min-height: 40px; display: inline-flex; align-items: center; }
.breadcrumb-link:hover { color: var(--clr-primary); }
.breadcrumb-current { color: var(--clr-text-dim); }
.meta-sep { color: var(--clr-text-dim); }

.article-h1 {
  font-size: clamp(1.5rem, 3.5vw, 2.4rem);
  font-weight: 700;
  line-height: 1.25;
  margin-bottom: 1rem;
  background: linear-gradient(135deg, var(--clr-primary) 20%, var(--clr-accent) 80%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.article-meta {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
  font-size: 0.78rem;
}
.article-date, .article-mod {
  color: var(--clr-text-dim);
  font-weight: 300;
}

.article-hero-wrap { margin-top: 1.2rem; }
.article-hero-img { width: 100%; max-height: 360px; object-fit: cover; }

/* ========== Prose 正文 ========== */
.prose {
  max-width: 68ch;
  font-size: 1.05rem;
  line-height: 1.8;
  color: var(--clr-text);
}
.prose h2 {
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--clr-primary);
  margin: 2.2rem 0 0.8rem;
  line-height: 1.3;
  text-shadow: 0 0 10px var(--clr-glow-g);
}
.prose h3 {
  font-size: 1.08rem;
  font-weight: 600;
  color: var(--clr-accent);
  margin: 1.8rem 0 0.6rem;
  text-shadow: 0 0 8px var(--clr-glow-c);
}
.prose p { margin-bottom: 1.2rem; }
.prose a { color: var(--clr-primary); border-bottom: 1px solid rgba(105,255,105,0.3); }
.prose a:hover { color: var(--clr-accent); border-color: var(--clr-accent); }
.prose blockquote {
  margin: 1.5rem 0;
  padding: 1rem 1.2rem;
  border-left: 3px solid var(--clr-primary);
  background: rgba(105,255,105,0.05);
  border-radius: 0 var(--radius-card) var(--radius-card) 0;
  font-style: italic;
  color: var(--clr-text-dim);
}
.prose strong { color: var(--clr-chrome1); font-weight: 600; }
.prose em { color: var(--clr-accent); font-style: italic; }
.prose ul, .prose ol { margin: 0.8rem 0 1.2rem 1.5rem; }
.prose ul { list-style: disc; }
.prose ol { list-style: decimal; }
.prose li { margin-bottom: 0.4rem; line-height: 1.7; }
.prose hr {
  border: none;
  border-top: 1px solid var(--clr-border);
  margin: 2rem 0;
}
.prose code {
  background: rgba(105,255,105,0.1);
  padding: 0.15em 0.4em;
  border-radius: 2px;
  font-size: 0.9em;
  color: var(--clr-accent);
}
.prose time { font-size: 0.85rem; color: var(--clr-text-dim); font-weight: 300; }

/* ========== 相关文章块 ========== */
.related-links {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 0.8rem;
}

.related-card {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
  padding: 1rem;
  background: var(--clr-card-bg);
  border: 1px solid var(--clr-border);
  border-radius: var(--radius-card);
  transition: all var(--transition);
  color: var(--clr-text);
}
.related-card:hover {
  border-color: rgba(0,255,255,0.4);
  box-shadow: 0 4px 20px rgba(0,255,255,0.12);
  transform: translateY(-2px);
  color: var(--clr-text);
}
.related-card strong {
  font-size: 0.86rem;
  color: var(--clr-primary);
  font-weight: 600;
  line-height: 1.4;
}
.related-card span {
  font-size: 0.78rem;
  color: var(--clr-text-dim);
  line-height: 1.5;
}

.nav-links-block { margin-top: 0.5rem; }
.nav-link-home {
  font-size: 0.84rem;
  color: var(--clr-text-dim);
  min-height: 44px;
  display: inline-flex;
  align-items: center;
  transition: color var(--transition);
}
.nav-link-home:hover { color: var(--clr-primary); }

/* ========== About 页 ========== */
.about-hero {
  min-height: 40vh;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 3rem 2rem;
  border-bottom: 1px solid var(--clr-border);
  background: linear-gradient(160deg, rgba(0,255,255,0.04) 0%, transparent 60%);
}
.about-hero-inner { max-width: 600px; }
.about-eyebrow {
  font-size: 0.75rem;
  letter-spacing: 0.2em;
  color: var(--clr-accent);
  text-transform: uppercase;
  margin-bottom: 1rem;
  text-shadow: 0 0 8px var(--clr-glow-c);
}
.about-h1 {
  font-size: clamp(1.6rem, 4vw, 2.8rem);
  font-weight: 700;
  line-height: 1.2;
  margin-bottom: 1rem;
  background: linear-gradient(135deg, var(--clr-primary) 0%, var(--clr-accent) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.about-sub {
  font-size: 1rem;
  color: var(--clr-text-dim);
  line-height: 1.7;
  font-weight: 300;
}

.about-article {
  flex: 1;
  min-width: 0;
  display: flex;
  flex-direction: column;
  gap: 3rem;
}

.about-article-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 0.7rem;
}

.about-article-card {
  display: flex;
  flex-direction: column;
  gap: 0.3rem;
  padding: 1rem 1.1rem;
  background: var(--clr-card-bg);
  border: 1px solid var(--clr-border);
  border-radius: var(--radius-card);
  transition: all var(--transition);
  color: var(--clr-text);
}
.about-article-card:hover {
  border-color: rgba(105,255,105,0.4);
  transform: translateX(4px);
  color: var(--clr-text);
}
.about-article-card strong {
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--clr-primary);
  line-height: 1.4;
}
.about-article-card span {
  font-size: 0.78rem;
  color: var(--clr-text-dim);
  line-height: 1.5;
}
.about-article-card time {
  font-size: 0.72rem;
  color: rgba(139,191,139,0.5);
  font-weight: 300;
}

.about-nav-links {
  display: flex;
  flex-wrap: wrap;
  gap: 0.7rem;
}

.about-nav-card {
  display: inline-flex;
  align-items: center;
  padding: 0.6rem 1rem;
  min-height: 44px;
  background: rgba(105,255,105,0.07);
  border: 1px solid var(--clr-border);
  border-radius: var(--radius-card);
  transition: all var(--transition);
  color: var(--clr-text);
}
.about-nav-card:hover {
  background: rgba(105,255,105,0.14);
  border-color: var(--clr-primary);
  color: var(--clr-primary);
}
.about-nav-card strong {
  font-size: 0.84rem;
  font-weight: 500;
}

/* ========== Privacy 页 ========== */
.privacy-article {
  flex: 1;
  min-width: 0;
  display: flex;
  flex-direction: column;
  gap: 2.5rem;
}

.privacy-h1 {
  font-size: clamp(1.4rem, 3vw, 2rem);
  font-weight: 700;
  line-height: 1.3;
  margin-bottom: 0.5rem;
  color: var(--clr-primary);
  text-shadow: 0 0 16px var(--clr-glow-g);
}

.privacy-nav-links {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
}

.privacy-link-card {
  display: inline-flex;
  align-items: center;
  padding: 0.7rem 1.2rem;
  min-height: 48px;
  background: var(--clr-card-bg);
  border: 1px solid var(--clr-border);
  border-radius: var(--radius-card);
  transition: all var(--transition);
  color: var(--clr-text);
}
.privacy-link-card:hover {
  border-color: var(--clr-primary);
  background: rgba(105,255,105,0.08);
  color: var(--clr-primary);
}
.privacy-link-card strong {
  font-size: 0.9rem;
  font-weight: 600;
}

/* ========== Default 页 ========== */
.default-article {
  flex: 1;
  min-width: 0;
  display: flex;
  flex-direction: column;
  gap: 2rem;
}

.default-nav-links {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
}

.default-nav-card {
  display: inline-flex;
  align-items: center;
  padding: 0.6rem 1.1rem;
  min-height: 44px;
  background: var(--clr-card-bg);
  border: 1px solid var(--clr-border);
  border-radius: var(--radius-card);
  transition: all var(--transition);
  color: var(--clr-text);
}
.default-nav-card:hover {
  border-color: var(--clr-accent);
  color: var(--clr-accent);
}
.default-nav-card strong { font-size: 0.88rem; font-weight: 500; }

/* ========== 页脚 footer > section×n ========== */
.site-footer {
  border-top: 1px solid var(--clr-border);
  padding: 3rem 2rem 0;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 2rem;
  background: rgba(16, 28, 16, 0.8);
  position: relative;
}
.site-footer::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--clr-primary), var(--clr-accent), transparent);
}

.site-footer > section {
  padding-bottom: 2rem;
}

.footer-brand {
  font-size: 1rem;
  font-weight: 700;
  color: var(--clr-primary);
  letter-spacing: 0.04em;
  margin-bottom: 0.6rem;
  text-shadow: 0 0 10px var(--clr-glow-g);
}
.footer-tagline { font-size: 0.78rem; color: var(--clr-text-dim); line-height: 1.6; }

.site-footer h4 {
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.14em;
  color: var(--clr-accent);
  text-transform: uppercase;
  margin-bottom: 0.9rem;
  text-shadow: 0 0 6px var(--clr-glow-c);
}

.footer-nav-sec ul,
.footer-links-sec ul {
  display: flex;
  flex-direction: column;
  gap: 0.3rem;
}
.footer-nav-sec ul li a,
.footer-links-sec ul li a {
  font-size: 0.8rem;
  color: var(--clr-text-dim);
  min-height: 36px;
  display: inline-flex;
  align-items: center;
  transition: color var(--transition);
}
.footer-nav-sec ul li a:hover,
.footer-links-sec ul li a:hover { color: var(--clr-primary); }

.footer-contact-sec p { font-size: 0.8rem; color: var(--clr-text-dim); margin-bottom: 0.8rem; line-height: 1.6; }

.footer-form {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}
.footer-form label { font-size: 0.72rem; color: var(--clr-text-dim); letter-spacing: 0.06em; }
.footer-form input[type="email"] {
  padding: 0.55rem 0.8rem;
  background: rgba(105,255,105,0.07);
  border: 1px solid var(--clr-border);
  border-radius: var(--radius-btn);
  color: var(--clr-text);
  font-size: 0.84rem;
  outline: none;
  transition: border-color var(--transition);
  min-height: 40px;
}
.footer-form input[type="email"]:focus { border-color: var(--clr-primary); }
.footer-form button {
  padding: 0.6rem 1rem;
  min-height: 40px;
  background: linear-gradient(135deg, var(--clr-primary), var(--clr-accent));
  color: var(--clr-dark);
  font-size: 0.82rem;
  font-weight: 600;
  border: none;
  border-radius: var(--radius-btn);
  cursor: pointer;
  transition: all var(--transition);
  letter-spacing: 0.04em;
}
.footer-form button:hover {
  box-shadow: 0 0 16px var(--clr-glow-g);
  transform: translateY(-1px);
}

.footer-bottom {
  grid-column: 1 / -1;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1.2rem 0;
  border-top: 1px solid var(--clr-border);
  font-size: 0.75rem;
  color: var(--clr-text-dim);
  flex-wrap: wrap;
  gap: 0.5rem;
}
.footer-bottom a { color: var(--clr-text-dim); min-height: 40px; display: inline-flex; align-items: center; padding: 0 0.2rem; }
.footer-bottom a:hover { color: var(--clr-primary); }

/* ========== iridescent 卡片装饰 ========== */
@keyframes iridescent-shift {
  0%   { background-position: 0% 50%; }
  50%  { background-position: 100% 50%; }
  100% { background-position: 0% 50%; }
}

.feature-card::after {
  content: '';
  position: absolute;
  inset: -1px;
  border-radius: var(--radius-card);
  background: linear-gradient(135deg,
    rgba(105,255,105,0) 0%,
    rgba(0,255,255,0.08) 25%,
    rgba(105,255,105,0.06) 50%,
    rgba(0,255,255,0.08) 75%,
    rgba(105,255,105,0) 100%
  );
  background-size: 300% 300%;
  animation: iridescent-shift 6s ease infinite;
  pointer-events: none;
  opacity: 0;
  transition: opacity var(--transition);
  z-index: 0;
}
.feature-card:hover::after { opacity: 1; }

/* ========== 霓虹闪烁动效 ========== */
@keyframes neon-pulse {
  0%, 100% { text-shadow: 0 0 8px var(--clr-glow-g), 0 0 20px var(--clr-glow-g); }
  50%       { text-shadow: 0 0 16px var(--clr-glow-g), 0 0 40px var(--clr-glow-g), 0 0 60px var(--clr-glow-c); }
}

.hero-h1 { animation: neon-pulse 4s ease-in-out infinite; }

/* ========== 视差滚动（JS 辅助）========== */
.hero-section { transform: translateZ(0); }

/* ========== 滚动进入动效 ========== */
@keyframes fade-up {
  from { opacity: 0; transform: translateY(20px); }
  to   { opacity: 1; transform: translateY(0); }
}

.feature-card,
.recent-item,
.about-article-card,
.related-card {
  animation: fade-up 0.4s ease both;
}

/* ========== prefers-reduced-motion ========== */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation: none !important;
    transition: none !important;
  }
}

/* ========== 响应式 ========== */
@media (max-width: 1100px) {
  .site-aside { width: 200px; }
  --aside-w: 190px;
}

@media (max-width: 900px) {
  .site-aside {
    width: 100%;
    height: auto;
    position: relative;
    border-right: none;
    border-bottom: 1px solid var(--clr-border);
    flex-direction: row;
  }
  .site-aside nav {
    flex-direction: row;
    flex-wrap: wrap;
    align-items: center;
    padding: 0.8rem 1rem;
    gap: 0;
  }
  .nav-brand-wrap {
    padding: 0 1rem 0 0;
    border-bottom: none;
    border-right: 1px solid var(--clr-border);
    margin-bottom: 0;
    margin-right: 0.8rem;
  }
  .site-aside nav ul {
    flex-direction: row;
    flex-wrap: wrap;
    gap: 0;
  }
  .site-aside nav ul li a {
    padding: 0.5rem 0.7rem;
    border-left: none;
    border-bottom: 2px solid transparent;
    font-size: 0.78rem;
    min-height: 44px;
  }
  .site-aside nav ul li a:hover,
  .site-aside nav ul li a[aria-current="page"] {
    border-left-color: transparent;
    border-bottom-color: var(--clr-primary);
    background: transparent;
  }

  .site-wrapper { flex-direction: column; }
  .page-body { min-height: 0; }

  .home-main,
  .article-main,
  .about-main,
  .privacy-main,
  .default-main {
    flex-direction: column;
    padding: 1.5rem 1rem 2rem;
    gap: 2rem;
  }

  .content-aside {
    width: 100%;
    position: relative;
    top: 0;
    flex-direction: row;
    flex-wrap: wrap;
  }
  .aside-block { flex: 1; min-width: 200px; }

  .hero-section { min-height: 60vh; padding: 3rem 1.2rem; }
  .about-hero { min-height: 30vh; padding: 2.5rem 1.2rem; }

  .feature-grid { grid-template-columns: 1fr; }
  .related-links { grid-template-columns: 1fr; }

  .site-footer {
    grid-template-columns: repeat(2, 1fr);
    padding: 2rem 1rem 0;
  }
}

@media (max-width: 600px) {
  body { font-size: 16px; }
  .site-footer { grid-template-columns: 1fr; }
  .site-footer > section { padding-bottom: 1.5rem; }
  .footer-bottom {
    flex-direction: column;
    align-items: flex-start;
    gap: 0.5rem;
  }
  .hero-section { min-height: 55vh; padding: 2.5rem 1rem; }
  .hero-h1 { font-size: 1.8rem; }
  .home-main,
  .article-main,
  .about-main,
  .privacy-main,
  .default-main { padding: 1.2rem 0.8rem 2rem; }
  .prose { font-size: 1rem; }
  .article-h1 { font-size: 1.4rem; }
  .about-h1 { font-size: 1.6rem; }
  .content-aside { flex-direction: column; }
  .aside-block { min-width: unset; }
  .privacy-nav-links { flex-direction: column; }
  .about-nav-links { flex-direction: column; }
  .nav-brand-wrap {
    border-right: none;
    border-bottom: 1px solid var(--clr-border);
    padding-bottom: 0.5rem;
    margin-bottom: 0.5rem;
    margin-right: 0;
    width: 100%;
  }
  .site-aside nav {
    flex-direction: column;
    align-items: flex-start;
  }
  .site-aside nav ul {
    flex-direction: column;
    width: 100%;
  }
}