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

/* ===========================
   CSS 变量 & 基础重置
   =========================== */
:root {
  --mint: #b4fde1;
  --ice: #add8e6;
  --dark: #172620;
  --mint-dim: #8ef0c8;
  --ice-dim: #8ac5d8;
  --dark-mid: #1f3630;
  --dark-light: #2a4a40;
  --text-main: #0d1f1a;
  --text-muted: #3a5a50;
  --text-on-dark: #d4f5ea;
  --border-color: var(--dark);
  --border-w: 3px;
  --radius-card: 20px;
  --radius-btn: 14px;
  --radius-tag: 10px;
  --shadow-outer: 4px 4px 0px var(--dark);
  --shadow-inner: inset -2px -2px 6px rgba(0,0,0,0.12);
  --shadow-card: var(--shadow-inner), var(--shadow-outer);
  --font-mono: 'Fira Code', 'Courier New', monospace;
  --font-sans: 'Fira Sans', system-ui, -apple-system, sans-serif;
  --nav-h: 96px;
  --content-max: 1100px;
  --aside-w: 220px;
  --gap: 24px;
  --transition: 200ms cubic-bezier(0.34, 1.56);
}

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

html {
  font-size: 16px;
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-sans);
  font-size: 1rem;
  line-height: 1.65;
  color: var(--text-main);
  background: var(--dark);
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
}

img { max-width: 100%; height: auto; display: block; border-radius: 12px; }
a { color: inherit; text-decoration: none; }
ul, ol { list-style: none; }

/* ===========================
   页面容器
   =========================== */
.page-wrap {
  display: flex;
  flex-direction: column;
  min-height: 100vh;
  background: linear-gradient(160deg, #1a2f28 0%, var(--dark) 100%);
}

/* ===========================
   顶部双行 Header
   =========================== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--dark);
  border-bottom: var(--border-w) solid var(--mint);
  box-shadow: 0 4px 16px rgba(0,0,0,0.4);
}

.brand-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 24px;
  background: linear-gradient(90deg, var(--dark-mid) 0%, var(--dark) 100%);
  border-bottom: 2px solid var(--dark-light);
  gap: 16px;
}

.brand-inner {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
}

.brand-logo {
  width: 40px;
  height: 40px;
  border-radius: 10px;
  border: var(--border-w) solid var(--mint);
  box-shadow: var(--shadow-outer);
  object-fit: cover;
}

.brand-name {
  font-family: var(--font-mono);
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--mint);
  letter-spacing: 0.04em;
  white-space: nowrap;
}

.brand-name:hover { color: var(--mint-dim); }

.brand-tagline {
  font-size: 0.8rem;
  color: var(--ice);
  opacity: 0.75;
  display: none;
}

.header-contact {
  flex-shrink: 0;
}

/* 导航行 */
.main-nav {
  background: var(--dark-mid);
  padding: 0 16px;
  overflow-x: auto;
  scrollbar-width: thin;
  scrollbar-color: var(--mint) transparent;
}

.main-nav p {
  display: flex;
  flex-wrap: wrap;
  gap: 4px;
  padding: 8px 0;
  align-items: center;
}

.main-nav p a {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  font-weight: 500;
  color: var(--text-on-dark);
  padding: 8px 14px;
  border-radius: 10px;
  border: 2px solid transparent;
  transition: all var(--transition);
  white-space: nowrap;
  min-height: 40px;
  display: flex;
  align-items: center;
}

.main-nav p a:hover,
.main-nav p a[aria-current="page"] {
  background: var(--mint);
  color: var(--dark);
  border-color: var(--dark);
  box-shadow: 2px 2px 0 var(--dark);
  transform: translateY(-1px);
}

/* ===========================
   按钮
   =========================== */
.clay-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-mono);
  font-size: 0.875rem;
  font-weight: 600;
  padding: 10px 20px;
  min-height: 42px;
  border-radius: var(--radius-btn);
  border: var(--border-w) solid var(--dark);
  background: linear-gradient(135deg, var(--mint) 0%, var(--mint-dim) 100%);
  color: var(--dark);
  cursor: pointer;
  box-shadow: var(--shadow-card);
  transition: transform var(--transition), box-shadow var(--transition);
  text-decoration: none;
  white-space: nowrap;
}

.clay-btn:hover {
  transform: translateY(-2px) scale(1.02);
  box-shadow: inset -2px -2px 6px rgba(0,0,0,0.15), 6px 6px 0 var(--dark);
}

.clay-btn:active {
  transform: translateY(1px) scale(0.98);
  box-shadow: inset -1px -1px 4px rgba(0,0,0,0.2), 2px 2px 0 var(--dark);
}

.clay-btn.sm {
  font-size: 0.78rem;
  padding: 8px 14px;
  min-height: 40px;
}

.clay-btn.lg {
  font-size: 1rem;
  padding: 14px 28px;
  min-height: 50px;
}

/* ===========================
   clay 卡片
   =========================== */
.clay-card {
  background: linear-gradient(145deg, rgba(180,253,225,0.12) 0%, rgba(173,216,230,0.08) 100%);
  border: var(--border-w) solid var(--mint);
  border-radius: var(--radius-card);
  box-shadow: var(--shadow-card);
  padding: var(--gap);
  transition: transform var(--transition), box-shadow var(--transition);
  overflow: hidden;
}

.clay-card:hover {
  transform: translateY(-3px);
  box-shadow: inset -2px -2px 8px rgba(0,0,0,0.12), 6px 6px 0 var(--mint-dim);
}

/* ===========================
   标签
   =========================== */
.clay-tag {
  display: inline-flex;
  align-items: center;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  font-weight: 600;
  padding: 5px 12px;
  border-radius: var(--radius-tag);
  border: 2px solid var(--ice);
  background: rgba(173,216,230,0.15);
  color: var(--ice);
  transition: all var(--transition);
  min-height: 32px;
}

.clay-tag:hover,
.clay-tag.active {
  background: var(--ice);
  color: var(--dark);
  border-color: var(--dark);
  box-shadow: 2px 2px 0 var(--dark);
  transform: translateY(-1px);
}

.tag-cloud {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

/* ===========================
   Hero 区域 (首页)
   =========================== */
.hero-section {
  position: relative;
  min-height: 45vh;
  display: flex;
  align-items: center;
  overflow: hidden;
  padding: 40px 24px;
}

.hero-grid-bg {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(180,253,225,0.08) 1px, transparent 1px),
    linear-gradient(90deg, rgba(180,253,225,0.08) 1px, transparent 1px);
  background-size: 32px 32px;
  pointer-events: none;
}

.hero-inner {
  position: relative;
  z-index: 1;
  display: flex;
  align-items: center;
  gap: 40px;
  max-width: var(--content-max);
  margin: 0 auto;
  width: 100%;
}

.hero-media {
  flex: 0 0 45%;
  max-width: 45%;
}

.hero-img {
  width: 100%;
  border-radius: 20px;
  border: var(--border-w) solid var(--mint);
  box-shadow: 6px 6px 0 var(--mint-dim), var(--shadow-inner);
}

.hero-placeholder {
  width: 100%;
  aspect-ratio: 16/9;
  background: linear-gradient(135deg, var(--dark-mid) 0%, var(--dark-light) 100%);
  border-radius: 20px;
  border: var(--border-w) solid var(--mint);
  box-shadow: 6px 6px 0 var(--mint-dim);
}

.hero-text {
  flex: 1;
  text-align: right;
}

.hero-text h1 {
  font-family: var(--font-mono);
  font-size: clamp(1.5rem, 3.5vw, 2.5rem);
  font-weight: 700;
  color: var(--mint);
  line-height: 1.3;
  margin-bottom: 16px;
  text-shadow: 2px 2px 0 rgba(0,0,0,0.3);
}

.hero-desc {
  font-size: 1rem;
  color: var(--text-on-dark);
  margin-bottom: 24px;
  line-height: 1.7;
  opacity: 0.9;
}

/* ===========================
   频道 Hero
   =========================== */
.channel-hero,
.page-hero,
.about-hero,
.privacy-hero {
  padding: 48px 24px 32px;
  text-align: center;
  background: linear-gradient(160deg, var(--dark-mid) 0%, var(--dark) 100%);
  border-bottom: var(--border-w) solid var(--mint);
  position: relative;
  overflow: hidden;
}

.channel-hero::before,
.page-hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image:
    radial-gradient(circle at 20% 50%, rgba(180,253,225,0.07) 0%, transparent 60%),
    radial-gradient(circle at 80% 30%, rgba(173,216,230,0.07) 0%, transparent 50%);
  pointer-events: none;
}

.channel-hero-inner,
.page-hero,
.about-hero,
.privacy-hero {
  position: relative;
  z-index: 1;
}

.channel-hero h1,
.page-hero h1,
.about-hero h1,
.privacy-hero h1 {
  font-family: var(--font-mono);
  font-size: clamp(1.5rem, 4vw, 2.8rem);
  font-weight: 700;
  color: var(--mint);
  margin-bottom: 12px;
  line-height: 1.3;
}

.channel-desc {
  font-size: 1rem;
  color: var(--ice);
  opacity: 0.85;
  max-width: 600px;
  margin: 0 auto;
  line-height: 1.7;
}

/* ===========================
   文章 Hero
   =========================== */
.article-header-section {
  padding: 32px 24px 24px;
  max-width: var(--content-max);
  margin: 0 auto;
  width: 100%;
}

.article-hero {
  margin-bottom: 20px;
}

.article-hero-img {
  width: 100%;
  max-height: 360px;
  object-fit: cover;
  border-radius: 18px;
  border: var(--border-w) solid var(--mint);
  box-shadow: 4px 4px 0 var(--mint-dim);
}

.article-meta {
  display: flex;
  align-items: center;
  gap: 16px;
  flex-wrap: wrap;
  margin-bottom: 12px;
}

.breadcrumb-link {
  font-family: var(--font-mono);
  font-size: 0.82rem;
  color: var(--ice);
  padding: 6px 12px;
  border: 2px solid var(--ice);
  border-radius: 8px;
  transition: all var(--transition);
  min-height: 40px;
  display: inline-flex;
  align-items: center;
}

.breadcrumb-link:hover {
  background: var(--ice);
  color: var(--dark);
  box-shadow: 2px 2px 0 var(--dark);
}

.date-row {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
}

.article-date {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--mint);
  background: rgba(180,253,225,0.1);
  padding: 4px 10px;
  border-radius: 8px;
  border: 1px solid rgba(180,253,225,0.3);
}

.article-date.mod { color: var(--ice); background: rgba(173,216,230,0.1); border-color: rgba(173,216,230,0.3); }

.article-header-section h1 {
  font-family: var(--font-mono);
  font-size: clamp(1.4rem, 3.5vw, 2.2rem);
  font-weight: 700;
  color: var(--mint);
  line-height: 1.35;
}

/* ===========================
   内容区：侧边栏 + 正文
   =========================== */
.content-section {
  display: flex;
  gap: var(--gap);
  max-width: var(--content-max);
  margin: var(--gap) auto;
  padding: 0 24px;
  width: 100%;
  align-items: flex-start;
}

.left-aside {
  flex: 0 0 var(--aside-w);
  width: var(--aside-w);
  display: flex;
  flex-direction: column;
  gap: 16px;
  position: sticky;
  top: 110px;
}

.aside-card {
  padding: 16px;
}

.aside-card h3 {
  font-family: var(--font-mono);
  font-size: 0.82rem;
  font-weight: 700;
  color: var(--mint);
  margin-bottom: 12px;
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

.aside-links {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.aside-links li {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.aside-links a {
  font-size: 0.85rem;
  color: var(--text-on-dark);
  padding: 6px 10px;
  border-radius: 8px;
  border: 1px solid transparent;
  transition: all var(--transition);
  min-height: 36px;
  display: flex;
  align-items: center;
  line-height: 1.4;
}

.aside-links a:hover {
  background: rgba(180,253,225,0.12);
  border-color: var(--mint);
  color: var(--mint);
  padding-left: 14px;
}

.aside-label {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--ice);
  opacity: 0.7;
}

.main-content {
  flex: 1;
  min-width: 0;
}

/* ===========================
   正文排版 prose
   =========================== */
.prose {
  color: var(--text-on-dark);
  font-size: 1rem;
  line-height: 1.75;
}

.prose h2 {
  font-family: var(--font-mono);
  font-size: 1.35rem;
  font-weight: 700;
  color: var(--mint);
  margin: 2em 0 0.75em;
  padding-bottom: 8px;
  border-bottom: 2px solid rgba(180,253,225,0.25);
}

.prose h3 {
  font-family: var(--font-mono);
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--ice);
  margin: 1.5em 0 0.6em;
}

.prose h4 {
  font-size: 1rem;
  font-weight: 600;
  color: var(--mint);
  margin: 1.2em 0 0.5em;
}

.prose p {
  margin-bottom: 1em;
}

.prose ul, .prose ol {
  margin: 0.75em 0 1em 1.5em;
  list-style: disc;
}

.prose ol { list-style: decimal; }

.prose li {
  margin-bottom: 0.4em;
  color: var(--text-on-dark);
}

.prose a {
  color: var(--mint);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.prose a:hover { color: var(--mint-dim); }

.prose strong { color: var(--mint); font-weight: 600; }

.prose blockquote {
  border-left: 4px solid var(--mint);
  padding: 12px 16px;
  margin: 1.5em 0;
  background: rgba(180,253,225,0.06);
  border-radius: 0 12px 12px 0;
  color: var(--ice);
  font-style: italic;
}

.prose table {
  width: 100%;
  border-collapse: collapse;
  margin: 1.5em 0;
  font-size: 0.9rem;
}

.prose th, .prose td {
  padding: 10px 14px;
  border: 2px solid rgba(180,253,225,0.2);
  text-align: left;
}

.prose th {
  background: rgba(180,253,225,0.1);
  color: var(--mint);
  font-family: var(--font-mono);
  font-weight: 600;
}

.prose code {
  font-family: var(--font-mono);
  font-size: 0.88em;
  background: rgba(180,253,225,0.12);
  padding: 2px 6px;
  border-radius: 6px;
  color: var(--mint);
}

.prose pre {
  background: var(--dark-mid);
  border: 2px solid rgba(180,253,225,0.2);
  border-radius: 12px;
  padding: 16px;
  overflow-x: auto;
  margin: 1.5em 0;
}

.prose pre code {
  background: none;
  padding: 0;
}

/* ===========================
   频道卡片 & 文章卡片
   =========================== */
.channels-section,
.latest-section,
.subpage-section {
  max-width: var(--content-max);
  margin: var(--gap) auto;
  padding: 0 24px var(--gap);
  width: 100%;
}

.channels-section h2,
.latest-section h2,
.subpage-section h2 {
  font-family: var(--font-mono);
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--mint);
  margin-bottom: var(--gap);
  padding-bottom: 10px;
  border-bottom: var(--border-w) solid rgba(180,253,225,0.3);
}

.channel-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  gap: var(--gap);
}

.channel-card {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.channel-card h3 {
  font-family: var(--font-mono);
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--mint);
  line-height: 1.4;
}

.card-desc {
  font-size: 0.875rem;
  color: var(--text-on-dark);
  opacity: 0.85;
  line-height: 1.6;
  flex: 1;
}

.article-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: var(--gap);
}

.article-card {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.article-card h4 {
  font-family: var(--font-mono);
  font-size: 0.9rem;
  font-weight: 600;
  line-height: 1.45;
}

.article-card h4 a {
  color: var(--ice);
  transition: color var(--transition);
}

.article-card h4 a:hover { color: var(--mint); }

.card-date {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--mint);
  background: rgba(180,253,225,0.1);
  padding: 3px 8px;
  border-radius: 6px;
  align-self: flex-start;
}

/* ===========================
   子页面列表 (ol > li > a + small)
   =========================== */
.subpage-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
  list-style: none;
  counter-reset: subpage;
}

.subpage-item {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 16px 20px;
}

.subpage-item a {
  font-family: var(--font-mono);
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--mint);
  display: flex;
  align-items: center;
  gap: 10px;
  transition: color var(--transition);
  min-height: 40px;
}

.subpage-item a:hover { color: var(--mint-dim); }

.item-num {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 28px;
  height: 28px;
  border-radius: 8px;
  background: var(--mint);
  color: var(--dark);
  font-size: 0.75rem;
  font-weight: 700;
  flex-shrink: 0;
  border: 2px solid var(--dark);
  box-shadow: 2px 2px 0 var(--dark);
}

.subpage-item small {
  font-size: 0.82rem;
  color: var(--text-on-dark);
  opacity: 0.75;
  line-height: 1.55;
}

.subpage-item small time {
  font-family: var(--font-mono);
  color: var(--ice);
  margin-left: 8px;
}

/* ===========================
   页脚
   =========================== */
.site-footer {
  margin-top: auto;
  padding: 24px 24px 20px;
  background: var(--dark-mid);
  border-top: var(--border-w) solid var(--mint);
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
}

.footer-brand {
  font-family: var(--font-mono);
  font-size: clamp(1.2rem, 4vw, 2rem);
  font-weight: 700;
  color: var(--mint);
  letter-spacing: 0.04em;
  line-height: 1.2;
}

.site-footer small {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--text-on-dark);
  opacity: 0.65;
}

.site-footer small a {
  color: var(--ice);
  text-decoration: underline;
  text-underline-offset: 2px;
  min-height: 40px;
  display: inline-flex;
  align-items: center;
  padding: 0 4px;
}

.site-footer small a:hover { color: var(--mint); }

/* ===========================
   h2 > span 标题装饰
   =========================== */
h2 > span, h3 > span {
  position: relative;
  display: inline;
}

h2 > span::after {
  content: '';
  position: absolute;
  bottom: -3px;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--mint), transparent);
  border-radius: 2px;
}

/* ===========================
   动效
   =========================== */
@media (prefers-reduced-motion: no-preference) {
  .clay-card {
    transition: transform 200ms cubic-bezier(0.34, 1.56), box-shadow 200ms ease-out;
  }

  .clay-btn {
    transition: transform 200ms cubic-bezier(0.34, 1.56), box-shadow 200ms ease-out;
  }

  .clay-tag {
    transition: all 200ms cubic-bezier(0.34, 1.56);
  }

  .main-nav p a {
    transition: all 200ms cubic-bezier(0.34, 1.56);
  }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}

/* ===========================
   Parallax 占位（JS 控制）
   =========================== */
.hero-grid-bg {
  will-change: transform;
}

/* ===========================
   响应式断点
   =========================== */
@media (max-width: 900px) {
  .content-section {
    flex-direction: column;
  }

  .left-aside {
    flex: none;
    width: 100%;
    position: static;
    flex-direction: row;
    flex-wrap: wrap;
  }

  .aside-card {
    flex: 1 1 200px;
  }

  .hero-inner {
    flex-direction: column;
    text-align: center;
  }

  .hero-media {
    flex: none;
    max-width: 100%;
    width: 100%;
  }

  .hero-text {
    text-align: center;
  }

  .channel-grid {
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  }
}

@media (max-width: 600px) {
  :root {
    --gap: 16px;
  }

  .brand-row {
    padding: 10px 16px;
  }

  .brand-tagline { display: none; }

  .main-nav p {
    gap: 2px;
  }

  .main-nav p a {
    font-size: 0.72rem;
    padding: 8px 10px;
  }

  .hero-section {
    min-height: auto;
    padding: 28px 16px;
  }

  .hero-text h1 {
    font-size: 1.4rem;
  }

  .channels-section,
  .latest-section,
  .subpage-section,
  .article-header-section {
    padding: 0 16px var(--gap);
  }

  .content-section {
    padding: 0 16px;
  }

  .channel-grid,
  .article-grid {
    grid-template-columns: 1fr;
  }

  .site-footer {
    flex-direction: column;
    align-items: flex-start;
    gap: 8px;
  }

  .footer-brand {
    font-size: 1.4rem;
  }

  .left-aside {
    flex-direction: column;
  }

  .aside-card {
    flex: none;
  }

  .channel-hero,
  .page-hero,
  .about-hero,
  .privacy-hero {
    padding: 32px 16px 24px;
  }
}

@media (max-width: 375px) {
  .brand-name { font-size: 1rem; }
  .clay-btn.sm { font-size: 0.72rem; padding: 8px 10px; }
  .hero-text h1 { font-size: 1.25rem; }
}