/* ============================================================
   DoubleC Studyverse — 全局视觉系统
   Deep Space + Silver Particle + Editorial
   阶段 01：全局视觉 / 星空背景 / DOUBLE C 粒子 Logo / Hero
   ============================================================ */

/* ---------- 调色板（唯一配色来源） ---------- */
:root {
  --dc-bg-0: #050608;   /* 最深 · 全局底色 */
  --dc-bg-1: #080B10;   /* 深 · 分区底色 */
  --dc-bg-2: #0D1117;   /* 面板 / 卡片 */
  --dc-ink-0: #FFFFFF;  /* 主标题 */
  --dc-ink-1: #E5E7EB;  /* 正文 */
  --dc-ink-2: #D1D5DB;  /* 次级文字 */
  --dc-ink-3: #AEB4BC;  /* 弱化文字 */
  --dc-ink-4: #7D858F;  /* 元信息 / 边框 */
  --dc-accent: #B8A9C6; /* 雾紫 · 少量点缀 */
  --dc-accent-soft: rgba(184, 169, 198, 0.14);
  --dc-warm: #C8BBAF;   /* 暖灰 · 增加人感 */

  --dc-glass: rgba(13, 17, 23, 0.62);
  --dc-glass-border: rgba(125, 133, 143, 0.18);
  --dc-line: rgba(125, 133, 143, 0.16);

  /* 灰色透明果冻玻璃（碎碎念等卡片） */
  --dc-jelly: rgba(174, 180, 188, 0.16);
  --dc-jelly-border: rgba(174, 180, 188, 0.24);

  --dc-serif: "STSong", "Songti SC", "SimSun", "Noto Serif SC", Georgia, "Times New Roman", serif;
  --dc-sans: "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
  --dc-mono: "Fira Code", "JetBrains Mono", Consolas, monospace;
}

/* ---------- 基础 ---------- */
html {
  background: var(--dc-bg-0);
}

body {
  background: var(--dc-bg-0);
  color: var(--dc-ink-1);
  font-family: var(--dc-sans);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

#body-wrap {
  background: var(--dc-bg-0);
}

::selection {
  background: rgba(209, 213, 219, 0.22);
  color: #fff;
}

/* ---------- 标题（Editorial · 宋体/Serif） ---------- */
h1, h2, h3, h4, h5, h6 {
  color: var(--dc-ink-0);
  font-family: var(--dc-serif);
  font-weight: 700;
  letter-spacing: 0.01em;
}

/* ---------- 导航栏 ---------- */
#nav {
  background: rgba(5, 6, 8, 0.72) !important;
  backdrop-filter: blur(18px) saturate(140%);
  -webkit-backdrop-filter: blur(18px) saturate(140%);
  border-bottom: 1px solid var(--dc-line);
  box-shadow: 0 2px 22px rgba(0, 0, 0, 0.35);
}

#nav .site-page {
  color: var(--dc-ink-2) !important;
  transition: color 0.25s ease;
}

#nav .site-page:hover {
  color: #fff !important;
  text-shadow: 0 0 12px rgba(255, 255, 255, 0.28);
}

#nav .site-name {
  color: #fff;
  font-family: var(--dc-serif);
  letter-spacing: 0.02em;
}

#nav .site-icon {
  filter: drop-shadow(0 0 8px rgba(209, 213, 219, 0.28));
}

/* ============================================================
   Hero — 第一屏
   ============================================================ */
#page-header.full_page {
  position: relative;
  isolation: isolate;
  overflow: hidden;
  height: 78vh !important;
  min-height: 620px;
  max-height: 780px;
  background: var(--dc-bg-0) !important;
}

/* 深层背景：深空渐变 + 银色细网格 + 光晕 + 渐暗 */
#page-header.full_page::before {
  content: '';
  position: absolute;
  inset: 0;
  z-index: 1;
  pointer-events: none;
  background:
    radial-gradient(ellipse 46% 40% at 50% 26%, rgba(230, 234, 240, 0.07), transparent 60%),
    linear-gradient(rgba(214, 219, 227, 0.028) 1px, transparent 1px),
    linear-gradient(90deg, rgba(214, 219, 227, 0.028) 1px, transparent 1px),
    radial-gradient(ellipse at 50% 30%, #0D1117 0%, #080B10 55%, #050608 100%);
  background-size: auto, 72px 72px, 72px 72px, auto;
}

/* 上下渐暗，聚焦中心 */
#page-header.full_page::after {
  content: '';
  position: absolute;
  inset: 0;
  z-index: 1;
  pointer-events: none;
  background:
    radial-gradient(ellipse at center 34%, transparent 32%, rgba(5, 6, 8, 0.34) 74%, rgba(5, 6, 8, 0.72) 100%),
    linear-gradient(180deg, rgba(5, 6, 8, 0.18) 0%, transparent 22%, transparent 74%, rgba(5, 6, 8, 0.7) 100%);
}

/* 粒子画布（三层星空 + 粒子 Logo），位于文字之下，不遮挡 */
.dc-particle-canvas {
  position: absolute;
  inset: 0;
  z-index: 2;
  width: 100%;
  height: 100%;
  pointer-events: none;
}

/* 站点信息块（标题 + 副标题 + 社交） */
#page-header.full_page #site-info {
  left: 50%;
  top: 58% !important;
  z-index: 3;
  width: min(1080px, calc(100% - 72px));
  padding: 0;
  text-align: left;
  transform: translate(-50%, -50%);
}

#page-header.full_page #site-title {
  margin: 12px 0 12px;
  color: #FFFFFF;
  font-family: var(--dc-serif);
  font-weight: 800;
  font-size: clamp(2.4rem, 5vw, 4.5rem) !important;
  letter-spacing: -0.02em;
  line-height: 1.08;
  text-align: left;
  text-shadow: 0 2px 22px rgba(0, 0, 0, 0.6), 0 0 30px rgba(225, 229, 235, 0.14);
}

.dc-hero-kicker {
  display: flex;
  align-items: center;
  gap: 11px;
  color: var(--dc-accent);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.2em;
}

.dc-hero-kicker i {
  width: 30px;
  height: 1px;
  background: linear-gradient(90deg, var(--dc-accent), transparent);
}

.dc-hero-role {
  margin: 0;
  color: var(--dc-ink-1);
  font-size: clamp(0.98rem, 1.6vw, 1.18rem);
  font-weight: 500;
  letter-spacing: 0.06em;
}

.dc-hero-summary {
  max-width: 620px;
  margin: 12px 0 0;
  color: var(--dc-ink-3);
  font-family: var(--dc-serif);
  font-size: clamp(0.92rem, 1.25vw, 1.05rem);
  line-height: 1.8;
  letter-spacing: 0.02em;
}

.dc-hero-tags,
.dc-hero-actions {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 10px;
}

.dc-hero-tags {
  margin-top: 18px;
}

.dc-hero-tags span {
  padding: 5px 12px;
  color: var(--dc-ink-2);
  font-size: 12px;
  letter-spacing: 0.08em;
  border: 1px solid rgba(184, 169, 198, 0.24);
  border-radius: 999px;
  background: rgba(184, 169, 198, 0.06);
}

.dc-hero-actions {
  margin-top: 22px;
}

.dc-hero-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 116px;
  padding: 10px 18px;
  color: var(--dc-ink-1) !important;
  font-size: 13px;
  letter-spacing: 0.05em;
  border: 1px solid var(--dc-glass-border);
  border-radius: 9px;
  background: rgba(13, 17, 23, 0.54);
  backdrop-filter: blur(12px);
  transition: transform .25s ease, border-color .25s ease, background .25s ease;
}

.dc-hero-btn:hover {
  color: #fff !important;
  border-color: rgba(184, 169, 198, 0.48);
  background: rgba(184, 169, 198, 0.12);
  transform: translateY(-2px);
}

.dc-hero-btn--primary {
  color: #0B0C10 !important;
  border-color: transparent;
  background: linear-gradient(135deg, #E7E1EA, #B8A9C6);
}

.dc-hero-btn--primary:hover {
  color: #050608 !important;
  background: linear-gradient(135deg, #F4F0F5, #C9BDD3);
}

/* Hero 只保留三行：粒子 Logo / 标题 / 副标题（社交图标交由侧边栏展示） */
#page-header.full_page #site_social_icons {
  display: none;
}

#page-header.full_page .scroll-down {
  z-index: 3;
  opacity: 0.45;
}

#page-header.full_page .scroll-down i {
  color: var(--dc-ink-2);
}

/* ============================================================
   内容区（Editorial 卡片）
   ============================================================ */
#content-inner {
  padding-top: 48px;
}

/* 卡片：深色玻璃 */
.card-widget,
#recent-posts .recent-post-item,
#aside-content .card-widget {
  background: var(--dc-glass) !important;
  backdrop-filter: blur(14px) saturate(130%);
  -webkit-backdrop-filter: blur(14px) saturate(130%);
  border: 1px solid var(--dc-glass-border);
  border-radius: 14px !important;
  box-shadow: 0 14px 44px rgba(0, 0, 0, 0.32);
  transition: border-color 0.3s ease, transform 0.3s ease, box-shadow 0.3s ease;
}

.card-widget:hover,
#recent-posts .recent-post-item:hover {
  border-color: rgba(174, 180, 188, 0.32);
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.42);
  transform: translateY(-2px);
}

#recent-posts .recent-post-item .article-title {
  color: var(--dc-ink-0) !important;
  font-family: var(--dc-serif);
  font-weight: 700;
}

#recent-posts .recent-post-item .article-meta-wrap,
#recent-posts .recent-post-item .article-meta-wrap a,
#recent-posts .recent-post-item .content {
  color: var(--dc-ink-3) !important;
}

#recent-posts .recent-post-item .article-meta-wrap i {
  color: var(--dc-ink-4);
}

/* 链接：银色 */
a {
  color: var(--dc-ink-2);
  transition: color 0.25s ease;
}

a:hover {
  color: #fff;
  text-shadow: 0 0 10px rgba(255, 255, 255, 0.2);
}

/* ============================================================
   文章页（Editorial）
   ============================================================ */
#post,
#page {
  background: var(--dc-bg-2) !important;
  border: 1px solid var(--dc-glass-border) !important;
  color: var(--dc-ink-1);
  box-shadow: 0 22px 70px rgba(0, 0, 0, 0.4) !important;
}

#post h1, #post h2, #post h3,
#page h1, #page h2, #page h3 {
  color: var(--dc-ink-0);
  font-family: var(--dc-serif);
}

#post h2::before,
#page h2::before {
  background: linear-gradient(180deg, #F5F6F7, #7D858F);
  box-shadow: 0 0 8px rgba(125, 133, 143, 0.3);
}

#post blockquote,
#page blockquote {
  color: var(--dc-ink-2);
  border-left-color: var(--dc-ink-4) !important;
  background: rgba(13, 17, 23, 0.5) !important;
}

#post a,
#page a {
  color: var(--dc-ink-2);
}

/* 代码块 */
figure.highlight {
  border-radius: 12px !important;
  overflow: hidden;
  box-shadow: 0 6px 20px rgba(0, 0, 0, 0.3);
}

/* ============================================================
   侧边栏 / 页脚 / 滚动条
   ============================================================ */
#footer {
  background: var(--dc-bg-1) !important;
  border-top: 1px solid var(--dc-line);
}

#footer,
#footer a {
  color: var(--dc-ink-4);
}

#footer .framework-info {
  display: none;
}

#aside-content #card-info-btn {
  color: #090A0D !important;
  background: linear-gradient(135deg, #E7E1EA, #B8A9C6) !important;
  box-shadow: none !important;
}

#aside-content #card-info-btn:hover {
  background: linear-gradient(135deg, #F4F0F5, #C9BDD3) !important;
}

#aside-content .card-announcement .item-headline i {
  color: var(--dc-accent) !important;
}

::-webkit-scrollbar {
  width: 7px;
}

::-webkit-scrollbar-track {
  background: var(--dc-bg-0);
}

::-webkit-scrollbar-thumb {
  background: linear-gradient(180deg, #D1D5DB, #7D858F);
  border-radius: 3px;
}

::-webkit-scrollbar-thumb:hover {
  background: #E5E7EB;
}

/* ============================================================
   响应式
   ============================================================ */
@media screen and (max-width: 768px) {
  #page-header.full_page {
    height: 74svh !important;
    min-height: 560px;
    max-height: 650px;
  }

  #page-header.full_page #site-info {
    top: 59% !important;
    width: calc(100% - 40px);
    text-align: center;
  }

  #page-header.full_page #site-title {
    margin-top: 9px;
    font-size: clamp(2rem, 10vw, 2.85rem) !important;
    text-align: center;
  }

  .dc-hero-kicker,
  .dc-hero-tags,
  .dc-hero-actions {
    justify-content: center;
  }

  .dc-hero-role {
    font-size: 0.9rem;
    line-height: 1.6;
  }

  .dc-hero-summary {
    margin-top: 8px;
    font-size: 0.86rem;
    line-height: 1.65;
  }

  .dc-hero-tags {
    margin-top: 13px;
  }

  .dc-hero-actions {
    margin-top: 16px;
  }

  .dc-hero-btn {
    min-width: 108px;
    padding: 9px 14px;
  }

  .card-widget,
  #recent-posts .recent-post-item {
    border-radius: 10px !important;
  }
}

/* ============================================================
   减少动态
   ============================================================ */
@media (prefers-reduced-motion: reduce) {
  .dc-particle-canvas {
    display: block;
  }
}