/* ============================================
   FDE知识库 - 专业阅读样式
   参考 FDE工作手册 HTML 风格
   ============================================ */

/* ===== 基础变量 ===== */
:root {
  --primary: #191A1D;
  --primary-light: #3a3b40;
  --accent: #B39DD8;
  --accent-teal: #8BC9B8;
  --bg-page: #F3F1EE;
  --bg-card: #ffffff;
  --bg-sidebar: #191A1D;
  --text-main: #191A1D;
  --text-muted: #4a4b50;
  --text-light: #6e6e73;
  --border: #E4E1DA;
  --success: #4FAE8B;
  --danger: #e53e3e;
  --warning: #d69e2e;
  --info: #3182ce;
  --code-bg: #191A1D;
  --shadow: 0 4px 6px -1px rgba(0,0,0,0.08), 0 2px 4px -1px rgba(0,0,0,0.05);
  --shadow-lg: 0 10px 15px -3px rgba(0,0,0,0.08), 0 4px 6px -2px rgba(0,0,0,0.04);
  --radius: 12px;
  --sidebar-w: 280px;
}

/* ===== 重置 ===== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; font-size: 16px; }
body {
  font-family: 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', Arial, sans-serif;
  background:
    radial-gradient(circle at 10% 8%, rgba(139,201,184,0.13), transparent 28%),
    radial-gradient(circle at 90% 6%, rgba(179,157,216,0.12), transparent 28%),
    linear-gradient(180deg, #FAFAF7 0%, var(--bg-page) 44%, #EDEAE3 100%);
  color: var(--text-main);
  line-height: 1.8;
  display: flex;
  min-height: 100vh;
}

/* ===== 侧边栏 ===== */
.sidebar {
  width: var(--sidebar-w);
  background:
    radial-gradient(circle at 18% 0%, rgba(139,201,184,0.14), transparent 30%),
    linear-gradient(180deg, #191A1D 0%, #111214 100%);
  position: fixed;
  top: 0; left: 0; bottom: 0;
  overflow-y: auto;
  z-index: 100;
  transition: transform 0.3s ease;
  display: flex;
  flex-direction: column;
}
.sidebar::-webkit-scrollbar { width: 4px; }
.sidebar::-webkit-scrollbar-thumb { background: rgba(255,255,255,0.2); border-radius: 2px; }

/* Logo */
.sidebar-logo {
  padding: 24px 20px;
  border-bottom: 1px solid rgba(255,255,255,0.1);
  display: flex;
  align-items: center;
  gap: 10px;
}
.sidebar-logo::before {
  content: '';
  display: inline-block;
  width: 24px; height: 31px;
  background: url('logo-mark-white.png') center/contain no-repeat;
  flex-shrink: 0;
}
.sidebar-logo-text {
  font-size: 0.95rem;
  font-weight: 700;
  color: #fff;
  letter-spacing: 1px;
  line-height: 1.3;
}
.sidebar-logo-text span {
  display: block;
  font-size: 0.68rem;
  font-weight: 400;
  color: rgba(255,255,255,0.45);
  letter-spacing: 0.5px;
  margin-top: 2px;
}

/* 搜索 */
.sidebar-search {
  padding: 14px 16px;
  border-bottom: 1px solid rgba(255,255,255,0.08);
  position: sticky;
  top: 0;
  z-index: 5;
  background: linear-gradient(180deg, #191A1D 0%, #111214 100%);
}
.search-input {
  width: 100%;
  padding: 9px 14px;
  border: 1px solid rgba(255,255,255,0.15);
  border-radius: 6px;
  background: rgba(255,255,255,0.08);
  color: #fff;
  font-size: 0.83rem;
  transition: all 0.2s;
}
.search-input::placeholder { color: rgba(255,255,255,0.4); }
.search-input:focus {
  outline: none;
  border-color: var(--accent-teal);
  background: rgba(255,255,255,0.12);
}

.search-results {
  margin-top: 10px;
  max-height: 360px;
  overflow-y: auto;
  border: 1px solid rgba(255,255,255,0.12);
  border-radius: 8px;
  background: rgba(12, 26, 42, 0.92);
  box-shadow: 0 14px 28px rgba(0,0,0,0.22);
}
.search-results[hidden] {
  display: none;
}
.search-result {
  display: block;
  padding: 10px 12px;
  color: rgba(255,255,255,0.86);
  text-decoration: none;
  border-bottom: 1px solid rgba(255,255,255,0.08);
}
.search-result:last-child {
  border-bottom: 0;
}
.search-result:hover {
  background: rgba(139,201,184,0.12);
  color: #fff;
}
.search-result-title {
  display: block;
  font-size: 0.78rem;
  font-weight: 700;
  line-height: 1.45;
}
.search-result-path {
  display: block;
  margin-top: 3px;
  color: rgba(255,255,255,0.42);
  font-size: 0.66rem;
  line-height: 1.4;
}
.search-result-snippet {
  display: block;
  margin-top: 5px;
  color: rgba(255,255,255,0.62);
  font-size: 0.68rem;
  line-height: 1.55;
}
.search-result mark {
  background: rgba(245, 158, 11, 0.34);
  color: #fff7ed;
  padding: 0 2px;
  border-radius: 3px;
}
.search-empty {
  padding: 12px;
  color: rgba(255,255,255,0.55);
  font-size: 0.76rem;
}

/* 导航 */
.sidebar-nav { padding: 12px 0; flex: 1; }

.nav-section {
  margin: 10px 10px 14px;
  padding: 8px 0 10px;
  border: 1px solid rgba(255,255,255,0.075);
  border-radius: 16px;
  background: rgba(255,255,255,0.035);
}
.nav-section.stage-appendix {
  background: rgba(255,255,255,0.022);
  border-style: dashed;
}

.nav-section-title {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  padding: 6px 12px 9px;
  margin: 0 8px 6px;
  border-bottom: 1px solid rgba(255,255,255,0.08);
  font-size: 0.78rem;
  line-height: 1.35;
  letter-spacing: 0.4px;
  color: rgba(255,255,255,0.9);
  font-weight: 800;
}
.part-title-main {
  display: flex;
  align-items: center;
  gap: 8px;
  min-width: 0;
}
.part-prefix {
  flex: 0 0 auto;
  color: rgba(255,239,213,0.92);
  background: rgba(179,157,216,0.18);
  border: 1px solid rgba(179,157,216,0.28);
  border-radius: 999px;
  padding: 2px 7px;
  font-size: 0.62rem;
  font-weight: 800;
  white-space: nowrap;
}
.part-name {
  min-width: 0;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.part-stage {
  flex: 0 0 auto;
  color: rgba(255,255,255,0.44);
  font-size: 0.62rem;
  font-weight: 700;
  letter-spacing: 0.6px;
}
.stage-appendix .part-stage,
.stage-appendix .part-name {
  color: rgba(255,255,255,0.52);
}
.nav-section-count {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 22px;
  height: 20px;
  flex: 0 0 auto;
  border-radius: 999px;
  background: rgba(179,157,216,0.18);
  border: 1px solid rgba(179,157,216,0.28);
  color: rgba(255,239,213,0.92);
  font-size: 0.68rem;
  font-weight: 800;
}

.nav-item {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 8px 14px;
  margin: 1px 8px;
  color: rgba(255,255,255,0.72);
  font-size: 0.82rem;
  cursor: pointer;
  border-left: 3px solid transparent;
  border-radius: 9px;
  transition: all 0.2s;
  text-decoration: none;
}
button.nav-item {
  width: 100%;
  border: 0;
  background: transparent;
  font: inherit;
  text-align: left;
}
.chapter-toggle {
  appearance: none;
}
.nav-item:hover {
  color: #fff;
  background: rgba(255,255,255,0.06);
  border-left-color: var(--accent-teal);
}
.nav-item.active {
  color: #fff;
  background: linear-gradient(90deg, rgba(179,157,216,0.32), rgba(65,197,155,0.1));
  border-left-color: #B39DD8;
  box-shadow: inset 0 0 0 1px rgba(255,255,255,0.04);
}

.nav-item .nav-icon { font-size: 0.9rem; flex-shrink: 0; }
.nav-item .nav-label { flex: 1; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.nav-item .chapter-label {
  display: flex;
  align-items: center;
  gap: 7px;
  min-width: 0;
}
.chapter-prefix {
  flex: 0 0 auto;
  color: rgba(255,255,255,0.3);
  background: rgba(255,255,255,0.045);
  border: 1px solid rgba(255,255,255,0.06);
  border-radius: 999px;
  padding: 1px 6px;
  font-size: 0.62rem;
  font-weight: 600;
}
.chapter-name {
  min-width: 0;
  color: rgba(255,255,255,0.62);
  font-weight: 500;
  overflow: hidden;
  text-overflow: ellipsis;
}
.chapter-toggle.active .chapter-prefix {
  color: rgba(255,239,213,0.74);
  border-color: rgba(179,157,216,0.22);
}
.chapter-toggle.active .chapter-name {
  color: rgba(255,255,255,0.9);
}
.nav-item .nav-count {
  font-size: 0.65rem;
  color: rgba(255,255,255,0.3);
  background: rgba(255,255,255,0.08);
  padding: 1px 6px;
  border-radius: 10px;
}
.nav-item .nav-arrow {
  font-size: 0.6rem;
  color: rgba(255,255,255,0.3);
  transition: transform 0.2s;
}

/* 子导航 */
.nav-sub-items {
  display: none;
  padding-left: 12px;
}
.nav-sub-items.open { display: block; }
.nav-item.sub-item {
  padding: 6px 20px 6px 28px;
  font-size: 0.78rem;
  color: rgba(255,255,255,0.58);
}
.nav-item.sub-item:hover {
  color: #fff;
  background: rgba(255,255,255,0.05);
}
.nav-item.sub-item.active {
  color: var(--accent-teal);
  background: rgba(139,201,184,0.08);
  border-left-color: var(--accent-teal);
}

/* ===== 主内容区 ===== */
.main {
  margin-left: var(--sidebar-w);
  flex: 1;
  min-width: 0;
  display: flex;
  flex-direction: column;
}

/* ===== 顶部栏 ===== */
.topbar {
  background: var(--bg-card);
  border-bottom: 1px solid var(--border);
  padding: 0 36px;
  height: 58px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  position: sticky;
  top: 0;
  z-index: 50;
  box-shadow: var(--shadow);
}
.topbar-left {
  display: flex;
  align-items: center;
  gap: 12px;
}
.menu-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: 6px;
  font-size: 1.3rem;
  color: var(--text-main);
}
.breadcrumb {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 0.82rem;
  color: var(--text-light);
}
.breadcrumb a {
  color: var(--text-muted);
  text-decoration: none;
}
.breadcrumb a:hover { color: var(--accent); }
.breadcrumb-sep { color: var(--border); }
.breadcrumb-current {
  color: var(--text-main);
  font-weight: 500;
  max-width: 320px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.topbar-right {
  display: flex;
  align-items: center;
  gap: 12px;
}
.topbar-btn {
  display: flex;
  align-items: center;
  gap: 5px;
  padding: 7px 14px;
  border: 1px solid var(--border);
  background: var(--bg-card);
  border-radius: 6px;
  font-size: 0.8rem;
  color: var(--text-muted);
  cursor: pointer;
  transition: all 0.2s;
}
.topbar-btn:hover {
  border-color: var(--accent);
  color: var(--accent);
}

/* ===== 进度条 ===== */
#progress-bar {
  position: fixed;
  top: 58px;
  left: var(--sidebar-w);
  right: 0;
  height: 3px;
  background: var(--border);
  z-index: 49;
}
#progress-bar .bar {
  height: 100%;
  background: linear-gradient(90deg, var(--accent), var(--accent-teal));
  width: 0%;
  transition: width 0.15s;
}

/* ===== 内容区 ===== */
.content {
  flex: 1;
  padding: 36px 40px 80px;
}
.content-inner {
  max-width: 880px;
  margin: 0 auto;
}

/* ===== 封面 Hero ===== */
.hero {
  background:
    linear-gradient(135deg, rgba(18,51,61,0.98) 0%, rgba(31,90,97,0.96) 64%, rgba(179,157,216,0.88) 100%);
  border-radius: var(--radius);
  padding: 52px 48px;
  color: #fff;
  margin-bottom: 36px;
  position: relative;
  overflow: hidden;
}
.hero::before {
  content: '';
  position: absolute;
  top: -40%; right: -5%;
  width: 380px; height: 380px;
  background: radial-gradient(circle, rgba(179,157,216,0.22) 0%, transparent 70%);
  border-radius: 50%;
}
.hero::after {
  content: '';
  position: absolute;
  bottom: -25%; left: -3%;
  width: 280px; height: 280px;
  background: radial-gradient(circle, rgba(139,201,184,0.18) 0%, transparent 70%);
  border-radius: 50%;
}
.hero-label {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: rgba(255,255,255,0.15);
  padding: 4px 12px;
  border-radius: 20px;
  font-size: 0.72rem;
  margin-bottom: 18px;
  letter-spacing: 0.5px;
}
.hero h1 {
  font-size: 2.2rem;
  font-weight: 800;
  line-height: 1.25;
  margin-bottom: 14px;
  letter-spacing: 0.5px;
}
.hero-desc {
  font-size: 0.95rem;
  opacity: 0.88;
  line-height: 1.7;
  max-width: 580px;
}
.hero-tags {
  display: flex;
  gap: 8px;
  margin-top: 22px;
  flex-wrap: wrap;
}
.hero-tag {
  padding: 4px 12px;
  background: rgba(255,255,255,0.12);
  border: 1px solid rgba(255,255,255,0.2);
  border-radius: 20px;
  font-size: 0.75rem;
  color: rgba(255,255,255,0.9);
}
.hero-tag.primary {
  background: rgba(179,157,216,0.35);
  border-color: rgba(179,157,216,0.52);
}

.learning-path {
  margin-bottom: 36px;
}
.operating-loop {
  margin-bottom: 36px;
  padding: 26px;
  border-radius: 20px;
  background:
    linear-gradient(135deg, rgba(18,51,61,0.96), rgba(31,90,97,0.94)),
    var(--primary);
  color: #fff;
  box-shadow: var(--shadow);
  overflow: hidden;
  position: relative;
}
.operating-loop::after {
  content: '';
  position: absolute;
  right: -70px;
  top: -80px;
  width: 240px;
  height: 240px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(139,201,184,0.2), transparent 70%);
}
.operating-loop .block-heading {
  position: relative;
  z-index: 1;
}
.operating-loop .block-heading span {
  color: #fff;
}
.operating-loop .block-heading strong {
  color: rgba(255,255,255,0.68);
}
.loop-grid {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 12px;
}
.loop-card {
  min-height: 152px;
  padding: 18px;
  border-radius: 16px;
  background: rgba(255,255,255,0.08);
  border: 1px solid rgba(255,255,255,0.12);
}
.loop-step {
  display: inline-flex;
  margin-bottom: 14px;
  color: rgba(255,214,165,0.92);
  font-size: 0.72rem;
  font-weight: 900;
  letter-spacing: 1px;
}
.loop-card h3 {
  margin: 0 0 8px;
  font-size: 0.98rem;
}
.loop-card p {
  margin: 0;
  color: rgba(255,255,255,0.68);
  font-size: 0.78rem;
  line-height: 1.65;
}
.block-heading {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 16px;
}
.block-heading span {
  color: var(--primary);
  font-size: 1.15rem;
  font-weight: 800;
}
.block-heading strong {
  color: var(--text-light);
  font-size: 0.82rem;
  font-weight: 500;
}
.path-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
}
.path-card {
  min-height: 172px;
  padding: 20px;
  border-radius: 18px;
  background:
    linear-gradient(145deg, rgba(255,255,255,0.94), rgba(242,247,245,0.9));
  border: 1px solid rgba(18,51,61,0.12);
  box-shadow: 0 12px 32px rgba(18, 51, 61, 0.08);
  position: relative;
  overflow: hidden;
}
.path-card::after {
  content: '';
  position: absolute;
  right: -34px;
  bottom: -34px;
  width: 110px;
  height: 110px;
  border-radius: 50%;
  background: rgba(139,201,184,0.12);
}
.path-card-kicker {
  color: var(--accent);
  font-size: 0.92rem;
  font-weight: 800;
  margin-bottom: 10px;
}
.path-card p {
  color: var(--text-muted);
  font-size: 0.82rem;
  line-height: 1.75;
  margin-bottom: 14px;
}
.path-card-links {
  display: flex;
  flex-wrap: wrap;
  gap: 7px;
  position: relative;
  z-index: 1;
}
.path-card-links a {
  color: var(--primary);
  background: rgba(23,61,53,0.07);
  border: 1px solid rgba(23,61,53,0.12);
  border-radius: 999px;
  padding: 3px 9px;
  font-size: 0.72rem;
  text-decoration: none;
}
.path-card-links a:hover {
  color: #fff;
  background: var(--primary);
}
.hero-meta {
  display: flex;
  gap: 20px;
  margin-top: 24px;
  font-size: 0.8rem;
  opacity: 0.8;
}
.hero-meta-item {
  display: flex;
  align-items: center;
  gap: 5px;
}

/* ===== 统计卡片 ===== */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
  margin-bottom: 36px;
}
.stat-card {
  background: var(--bg-card);
  border-radius: var(--radius);
  border: 1px solid var(--border);
  padding: 22px;
  text-align: center;
  box-shadow: var(--shadow);
  transition: transform 0.2s, box-shadow 0.2s;
}
.stat-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
}
.stat-num {
  font-size: 2.2rem;
  font-weight: 800;
  color: var(--primary);
  line-height: 1;
  margin-bottom: 6px;
}
.stat-label {
  font-size: 0.8rem;
  color: var(--text-light);
}

/* ===== 板块卡片 ===== */
.sections-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
  margin-bottom: 36px;
}
.section-card {
  background: var(--bg-card);
  border-radius: var(--radius);
  border: 1px solid var(--border);
  overflow: hidden;
  box-shadow: var(--shadow);
  transition: transform 0.2s, box-shadow 0.2s;
}
.section-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
}
.section-card-header {
  background: linear-gradient(90deg, var(--primary) 0%, var(--primary-light) 100%);
  padding: 14px 20px;
  display: flex;
  align-items: center;
  gap: 10px;
  color: #fff;
}
.section-card-icon {
  flex: 0 0 auto;
  padding: 2px 8px;
  border-radius: 999px;
  background: rgba(255,255,255,0.13);
  border: 1px solid rgba(255,255,255,0.18);
  font-size: 0.68rem;
  font-weight: 800;
  letter-spacing: 0.5px;
}
.section-card-title {
  font-size: 0.88rem;
  font-weight: 700;
}
.section-card.stage-appendix {
  background: rgba(255,255,255,0.86);
}
.section-card.stage-appendix .section-card-header {
  background: linear-gradient(90deg, #46555a 0%, #627276 100%);
}
.section-card-body { padding: 14px 18px; }
.section-card-item {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 7px 0;
  border-bottom: 1px solid var(--border);
  font-size: 0.83rem;
}
.section-card-item:last-child { border-bottom: none; }
.section-card-item-icon { color: var(--text-light); font-size: 0.8rem; }
.section-card-item-link {
  flex: 1;
  color: var(--text-main);
  text-decoration: none;
  transition: color 0.15s;
}
.section-card-item-link:hover { color: var(--accent); }
.section-card-item-count {
  font-size: 0.68rem;
  color: var(--text-light);
  background: var(--bg-page);
  padding: 2px 7px;
  border-radius: 10px;
}

/* ===== 章节卡片（阅读页用） ===== */
.chapter-header {
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%);
  border-radius: var(--radius);
  padding: 32px 36px;
  color: #fff;
  margin-bottom: 28px;
  position: relative;
  overflow: hidden;
}
.chapter-header::before {
  content: '';
  position: absolute;
  top: -50%; right: -10%;
  width: 350px; height: 350px;
  background: radial-gradient(circle, rgba(139,201,184,0.15) 0%, transparent 70%);
  border-radius: 50%;
}
.chapter-header-label {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: rgba(255,255,255,0.15);
  padding: 3px 10px;
  border-radius: 20px;
  font-size: 0.7rem;
  margin-bottom: 14px;
}
.chapter-header h1 {
  font-size: 1.7rem;
  font-weight: 800;
  line-height: 1.3;
  margin-bottom: 10px;
}
.chapter-header-meta {
  display: flex;
  gap: 16px;
  font-size: 0.78rem;
  opacity: 0.8;
}
.chapter-header-meta-item {
  display: flex;
  align-items: center;
  gap: 4px;
}

/* ===== 文章内容 ===== */
.article-content {
  background: var(--bg-card);
  border-radius: var(--radius);
  border: 1px solid var(--border);
  padding: 36px 40px;
  box-shadow: var(--shadow);
  font-size: 0.93rem;
  line-height: 1.85;
}

/* 标题 */
.article-content h1 {
  font-size: 1.6rem;
  font-weight: 800;
  color: var(--primary);
  margin: 36px 0 18px;
  padding-bottom: 10px;
  border-bottom: 2px solid var(--border);
  display: flex;
  align-items: center;
  gap: 8px;
}
.article-content h1:first-child { margin-top: 0; }

.article-content h2 {
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--primary);
  margin: 30px 0 14px;
  padding-bottom: 8px;
  border-bottom: 2px solid var(--border);
  display: flex;
  align-items: center;
  gap: 6px;
}

.article-content h3 {
  font-size: 1rem;
  font-weight: 700;
  color: var(--text-main);
  margin: 22px 0 10px;
  display: flex;
  align-items: center;
  gap: 5px;
}

.article-content h4 {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--text-main);
  margin: 16px 0 8px;
}

/* 段落 */
.article-content p {
  margin-bottom: 12px;
  color: var(--text-main);
}

/* 列表 */
.article-content ul,
.article-content ol {
  margin: 12px 0 14px 22px;
}
.article-content li {
  margin-bottom: 6px;
  line-height: 1.75;
}
.article-content li > ul,
.article-content li > ol {
  margin-top: 5px;
  margin-bottom: 0;
}

/* 嵌套列表样式 */
.article-content ul ul {
  list-style-type: circle;
}
.article-content ul ul ul {
  list-style-type: square;
}

/* 链接 */
.article-content a {
  color: var(--accent);
  text-decoration: none;
  border-bottom: 1px solid rgba(49,130,206,0.3);
  transition: border-color 0.15s;
}
.article-content a:hover {
  border-bottom-color: var(--accent);
}

/* 表格 */
.table-wrap {
  overflow-x: auto;
  margin: 18px 0;
  border-radius: var(--radius);
  border: 1px solid var(--border);
}
.article-content table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.85rem;
}
.article-content thead {
  background: var(--primary);
  color: #fff;
}
.article-content th {
  padding: 11px 16px;
  text-align: left;
  font-weight: 600;
  white-space: nowrap;
}
.article-content td {
  padding: 11px 16px;
  border-bottom: 1px solid var(--border);
  vertical-align: top;
}
.article-content tr:last-child td { border-bottom: none; }
.article-content tbody tr:nth-child(even) { background: #f8fafc; }
.article-content tbody tr:hover { background: #ebf8ff; }

/* 代码 */
.article-content code {
  font-family: 'Fira Code', 'Consolas', monospace;
  background: #edf2f7;
  color: #c53030;
  padding: 2px 6px;
  border-radius: 4px;
  font-size: 0.85em;
}
.article-content pre {
  background: var(--code-bg);
  color: #e2e8f0;
  padding: 16px 20px;
  border-radius: var(--radius);
  overflow-x: auto;
  margin: 16px 0;
  font-size: 0.82rem;
  line-height: 1.7;
}
.article-content pre code {
  background: none;
  color: inherit;
  padding: 0;
  font-size: inherit;
}

/* 引用块 */
.article-content blockquote {
  margin: 16px 0;
  padding: 14px 18px;
  background: linear-gradient(135deg, #ebf8ff 0%, #e6fffa 100%);
  border-left: 4px solid var(--accent);
  border-radius: 0 var(--radius) var(--radius) 0;
  color: var(--text-muted);
  font-style: italic;
}
.article-content blockquote strong {
  color: var(--accent);
  font-style: normal;
}

/* 分隔线 */
.article-content hr {
  border: none;
  border-top: 1px solid var(--border);
  margin: 30px 0;
}

/* 高亮 */
.article-content .highlight {
  background: #fef3c7;
  padding: 2px 5px;
  border-radius: 3px;
}

/* 标签 */
.tag {
  display: inline-block;
  padding: 2px 9px;
  border-radius: 20px;
  font-size: 0.72rem;
  font-weight: 600;
  margin-right: 3px;
}
.tag-green { background: #c6f6d5; color: #276749; }
.tag-red { background: #fed7d7; color: #c53030; }
.tag-blue { background: #bee3f8; color: #2b6cb0; }
.tag-orange { background: #feebc8; color: #c05621; }

/* 勾选列表 */
.article-content .checklist {
  list-style: none;
  margin-left: 0;
}
.article-content .checklist li {
  display: flex;
  align-items: flex-start;
  gap: 8px;
}
.article-content .checklist li::before {
  content: '☐';
  font-size: 0.95rem;
  flex-shrink: 0;
  margin-top: 2px;
  color: var(--accent);
}
.article-content .checklist li.done::before {
  content: '☑';
  color: var(--success);
}

/* ===== 底部导航 ===== */
.article-footer {
  margin-top: 32px;
  padding: 20px 0;
  border-top: 1px solid var(--border);
  display: flex;
  justify-content: space-between;
  gap: 20px;
}
.footer-nav {
  display: flex;
  flex-direction: column;
  gap: 4px;
  max-width: 42%;
}
.footer-nav-label {
  font-size: 0.72rem;
  color: var(--text-light);
}
.footer-nav-link {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 0.85rem;
  color: var(--accent);
  font-weight: 500;
  text-decoration: none;
  transition: color 0.15s;
}
.footer-nav-link:hover { color: var(--primary); }
.footer-nav-link span { font-size: 0.75rem; }
.footer-nav-title {
  font-size: 0.8rem;
  color: var(--text-muted);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.footer-nav.next { text-align: right; }

/* ===== Footer ===== */
.site-footer {
  padding: 24px 40px;
  border-top: 1px solid var(--border);
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.78rem;
  color: var(--text-light);
  background: var(--bg-page);
}
.footer-links {
  display: flex;
  gap: 16px;
}
.footer-links a {
  color: var(--text-muted);
  text-decoration: none;
}
.footer-links a:hover { color: var(--accent); }

/* ===== 返回顶部 ===== */
.back-to-top {
  position: fixed;
  bottom: 28px;
  right: 28px;
  width: 42px;
  height: 42px;
  background: var(--primary);
  color: #fff;
  border: none;
  border-radius: 50%;
  cursor: pointer;
  font-size: 1.1rem;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: var(--shadow-lg);
  opacity: 0;
  pointer-events: none;
  transform: translateY(10px);
  transition: all 0.2s;
  z-index: 99;
  text-decoration: none;
}
.back-to-top.show {
  opacity: 1;
  pointer-events: auto;
  transform: translateY(0);
}
.back-to-top:hover {
  background: var(--accent);
  transform: translateY(-2px);
}

.toast {
  position: fixed;
  left: 50%;
  bottom: 28px;
  z-index: 130;
  max-width: min(420px, calc(100vw - 32px));
  padding: 12px 16px;
  border-radius: 999px;
  background: rgba(16, 42, 50, 0.94);
  color: #fff;
  font-size: 0.86rem;
  font-weight: 700;
  text-align: center;
  box-shadow: var(--shadow-lg);
  opacity: 0;
  pointer-events: none;
  transform: translate(-50%, 12px);
  transition: opacity 0.2s ease, transform 0.2s ease;
}
.toast.show {
  opacity: 1;
  transform: translate(-50%, 0);
}

.article-share-panel {
  margin: 28px 0 18px;
  padding: 18px;
  border: 1px solid rgba(179,157,216,0.24);
  border-radius: 18px;
  background:
    radial-gradient(circle at 100% 0%, rgba(139,201,184,0.14), transparent 34%),
    linear-gradient(135deg, #fffaf3, #f4fbf8);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}
.article-share-panel strong {
  display: block;
  color: var(--primary);
  font-size: 1rem;
}
.article-share-panel p {
  margin-top: 4px;
  color: var(--text-muted);
  font-size: 0.86rem;
  line-height: 1.7;
}
.share-wide-btn {
  border: none;
  border-radius: 999px;
  padding: 11px 18px;
  background: linear-gradient(135deg, var(--accent), #a85d14);
  color: #fff;
  font-weight: 800;
  cursor: pointer;
  white-space: nowrap;
  box-shadow: 0 10px 20px rgba(179,157,216,0.2);
}
.share-wide-btn:hover {
  transform: translateY(-1px);
}

.mobile-homebar {
  display: none;
}

.sidebar-overlay {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.35);
  z-index: 99;
}
.sidebar-overlay.open {
  display: block;
}

/* ===== 响应式 ===== */
@media (max-width: 1024px) {
  .stats-grid { grid-template-columns: repeat(2, 1fr); }
  .sections-grid { grid-template-columns: 1fr; }
  .path-grid { grid-template-columns: repeat(2, 1fr); }
  .loop-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 900px) {
  .sidebar {
    transform: translateX(-100%);
    width: min(86vw, 320px);
    box-shadow: 18px 0 42px rgba(0,0,0,0.24);
  }
  .sidebar.open { transform: translateX(0); }
  .sidebar-search {
    padding: 12px 14px;
  }
  .search-results {
    max-height: min(54vh, 430px);
  }
  .main { margin-left: 0; }
  #progress-bar { left: 0; }
  .content { padding: 24px 20px 60px; }
  .article-content { padding: 24px 22px; }
  .chapter-header { padding: 24px 22px; }
  .menu-toggle { display: flex; }
  .mobile-homebar { display: flex; }
  .hero { padding: 36px 24px; }
  .hero h1 { font-size: 1.8rem; }
  .topbar {
    padding: 0 14px;
    min-height: 58px;
    gap: 10px;
  }
  .topbar-left {
    min-width: 0;
  }
  .topbar-left strong {
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    font-size: 0.95rem;
  }
  .topbar-right {
    gap: 6px;
    flex-shrink: 0;
  }
  .topbar-btn {
    padding: 7px 10px;
    font-size: 0.78rem;
  }
  .breadcrumb { display: none; }
  .article-footer { flex-direction: column; }
  .article-share-panel {
    align-items: stretch;
    flex-direction: column;
  }
  .share-wide-btn {
    width: 100%;
  }
  .footer-nav { max-width: 100%; }
  .footer-nav.next { text-align: left; }
  .site-footer { flex-direction: column; gap: 10px; text-align: center; padding: 20px; }
}

@media (max-width: 600px) {
  .stats-grid { grid-template-columns: repeat(2, 1fr); gap: 12px; }
  .stat-card { padding: 16px; }
  .stat-num { font-size: 1.8rem; }
  .operating-loop { padding: 22px 16px; }
  .loop-grid { grid-template-columns: 1fr; }
  .content { padding: 20px 12px 52px; }
  .article-content {
    font-size: 0.92rem;
    padding: 20px 16px;
    border-radius: 16px;
    line-height: 1.86;
  }
  .article-content h1 {
    font-size: 1.42rem;
    line-height: 1.35;
    margin-bottom: 16px;
  }
  .article-content h2 {
    font-size: 1.18rem;
    line-height: 1.45;
    margin-top: 26px;
  }
  .article-content h3 {
    font-size: 1.02rem;
    margin-top: 22px;
  }
  .article-content p,
  .article-content li {
    word-break: break-word;
  }
  .article-content table {
    display: block;
    width: 100%;
    overflow-x: auto;
    white-space: nowrap;
  }
  .article-content pre {
    padding: 12px 14px;
    font-size: 0.78rem;
    overflow-x: auto;
  }
  .article-content blockquote {
    margin-left: 0;
    margin-right: 0;
    padding: 12px 14px;
  }
  .block-heading { align-items: flex-start; flex-direction: column; }
  .path-grid { grid-template-columns: 1fr; }
  .article-share-panel {
    margin-top: 22px;
    padding: 16px;
  }
  .back-to-top {
    right: 14px;
    bottom: 18px;
    width: 40px;
    height: 40px;
  }
  .toast {
    bottom: 18px;
    border-radius: 16px;
  }
}

/* ===== 打印 ===== */
@media print {
  .sidebar, .topbar, .back-to-top, #progress-bar { display: none; }
  .main { margin-left: 0; }
  .content { padding: 0; }
  .article-content {
    box-shadow: none;
    border: none;
    padding: 20px;
  }
  .hero, .chapter-header {
    background: var(--primary) !important;
    -webkit-print-color-adjust: exact;
    print-color-adjust: exact;
  }
}

/* SUPERONES FDE / dark technical editorial system */
:root {
  --primary:#dce7e2; --primary-light:#f4faf6; --accent:#b7ff4a;
  --accent-teal:#b7ff4a; --bg-page:#0b0f10; --bg-card:#111719;
  --bg-sidebar:#080b0c; --text-main:#e9f2ed; --text-muted:#9eafaa;
  --text-light:#6f817c; --border:rgba(223,240,231,.14); --code-bg:#070a0b;
  --shadow:0 18px 48px rgba(0,0,0,.28); --shadow-lg:0 26px 80px rgba(0,0,0,.46);
  --radius:14px; --sidebar-w:316px;
}
html{background:var(--bg-page)}
body{font-family:"Aptos","PingFang SC","Microsoft YaHei",sans-serif;background:linear-gradient(rgba(183,255,74,.025) 1px,transparent 1px),linear-gradient(90deg,rgba(183,255,74,.025) 1px,transparent 1px),radial-gradient(circle at 76% 0%,rgba(183,255,74,.08),transparent 24rem),var(--bg-page);background-size:48px 48px,48px 48px,auto,auto;color:var(--text-main);line-height:1.75}
body::after{content:"SUPERONES / FDE";position:fixed;right:26px;bottom:16px;color:rgba(183,255,74,.24);font:700 10px/1 "Consolas",monospace;letter-spacing:.2em;pointer-events:none;z-index:2}
.sidebar{width:var(--sidebar-w);background:linear-gradient(180deg,#090d0e 0%,#0d1314 100%);border-right:1px solid var(--border);box-shadow:18px 0 50px rgba(0,0,0,.18)}
.sidebar-logo{padding:28px 22px 24px;border-bottom:1px solid var(--border);align-items:flex-start;gap:13px}
.sidebar-logo::before{width:34px;height:34px;margin-top:1px;border-radius:9px;background:var(--accent);box-shadow:0 0 0 5px rgba(183,255,74,.09),0 0 30px rgba(183,255,74,.22)}
.sidebar-logo-text{font:800 1rem/1.1 "Aptos","PingFang SC",sans-serif;letter-spacing:.06em;text-transform:uppercase}
.sidebar-logo-text span{margin-top:7px;color:var(--text-light);font:500 .65rem/1.4 "Consolas","PingFang SC",monospace;letter-spacing:.08em;text-transform:uppercase}
.sidebar-search{padding:18px 18px 14px;background:rgba(9,13,14,.94);border-bottom:1px solid var(--border)}
.search-input{padding:11px 13px;border:1px solid var(--border);border-radius:9px;background:#111819;color:var(--text-main);font-size:.78rem}
.search-input:focus{border-color:var(--accent);box-shadow:0 0 0 3px rgba(183,255,74,.1)}.search-input::placeholder{color:var(--text-light)}
.search-results{border-color:var(--border);background:#0d1314;box-shadow:var(--shadow-lg)}.search-result{color:var(--text-main);border-bottom-color:var(--border)}.search-result:hover{background:rgba(183,255,74,.09);color:var(--primary-light)}.search-result-path,.search-result-snippet{color:var(--text-muted)}.search-result mark{background:var(--accent);color:#0a0e0b}.search-empty{color:var(--text-muted)}
.sidebar-nav{padding:14px 10px 36px}.nav-section{margin:0 0 16px;padding:10px 0 12px;border:1px solid rgba(223,240,231,.1);border-radius:12px;background:rgba(255,255,255,.018)}
.nav-section-title{margin:0 10px 8px;padding:4px 7px 11px;border-bottom-color:var(--border);font-size:.7rem;letter-spacing:.04em}.part-prefix{padding:3px 6px;border:1px solid rgba(183,255,74,.3);border-radius:5px;background:rgba(183,255,74,.1);color:var(--accent);font:700 .58rem/1 "Consolas",monospace}.part-stage{color:var(--text-light);font:600 .58rem/1 "Consolas",monospace}
.nav-item{margin:2px 7px;border-left:2px solid transparent;border-radius:7px;color:var(--text-muted)}.nav-item:hover{background:rgba(183,255,74,.07);border-left-color:rgba(183,255,74,.55);color:var(--primary-light)}.nav-item.active{background:rgba(183,255,74,.12);border-left-color:var(--accent);color:var(--accent);box-shadow:none}.chapter-prefix{border-radius:4px;padding:3px 5px;background:rgba(255,255,255,.04);color:var(--text-light);font:600 .58rem/1 "Consolas",monospace}.chapter-name{color:var(--text-muted)}.nav-item .nav-count{background:rgba(255,255,255,.06);color:var(--text-light);border-radius:4px}.nav-item .nav-arrow{color:var(--accent)}.nav-sub-items{padding-left:10px}.nav-item.sub-item{padding:7px 14px 7px 22px;color:#81938e;font-size:.73rem}.nav-item.sub-item.active{background:rgba(183,255,74,.1);color:var(--accent);border-left-color:var(--accent)}
.main{background:transparent}.main>div:first-child{padding:8px 28px!important;background:#121a1a!important;color:var(--accent)!important;border-bottom:1px solid var(--border)!important;font:600 .68rem/1.4 "Consolas",monospace;letter-spacing:.08em;text-transform:uppercase}
.topbar{height:68px;padding:0 42px;background:rgba(11,15,16,.88);border-bottom-color:var(--border);box-shadow:0 8px 30px rgba(0,0,0,.12);backdrop-filter:blur(14px)}.topbar-left strong{color:var(--text-main);font-size:.8rem;letter-spacing:.12em;text-transform:uppercase}.breadcrumb{font:600 .7rem/1.2 "Consolas",monospace}.breadcrumb a{color:var(--accent)}.breadcrumb-sep{color:var(--text-light)}.breadcrumb-current{color:var(--text-main)}.topbar-right{gap:8px}.topbar-btn{padding:8px 12px;border-color:var(--border);background:rgba(255,255,255,.03);border-radius:7px;color:var(--text-muted);font:700 .68rem/1 "Consolas",monospace;letter-spacing:.04em;text-transform:uppercase}.topbar-btn:hover{border-color:var(--accent);color:var(--accent);background:rgba(183,255,74,.08)}.print-btn.topbar-tool{color:var(--accent);font:700 .64rem/1 "Consolas",monospace;letter-spacing:.08em;text-transform:uppercase}#progress-bar{top:68px;left:var(--sidebar-w);height:2px;background:rgba(255,255,255,.06)}#progress-bar .bar{background:var(--accent);box-shadow:0 0 12px rgba(183,255,74,.5)}
.content{padding:54px 48px 92px}.content-inner{max-width:980px}.hero{margin-bottom:30px;padding:58px 54px 50px;border:1px solid rgba(183,255,74,.22);border-radius:18px;background:linear-gradient(120deg,rgba(183,255,74,.1),transparent 42%),#101718;box-shadow:var(--shadow-lg)}.hero::before{top:-34%;right:-2%;width:420px;height:420px;background:radial-gradient(circle,rgba(183,255,74,.18),transparent 68%)}.hero::after{bottom:-40%;left:34%;width:360px;height:260px;background:radial-gradient(circle,rgba(183,255,74,.08),transparent 70%)}.hero-label{padding:5px 9px;border:1px solid rgba(183,255,74,.32);border-radius:5px;background:rgba(183,255,74,.08);color:var(--accent);font:700 .63rem/1 "Consolas",monospace;letter-spacing:.12em;text-transform:uppercase}.hero h1{max-width:760px;margin-bottom:18px;color:var(--primary-light);font-size:clamp(2.4rem,5vw,4.8rem);line-height:.98;letter-spacing:-.055em}.hero-desc{max-width:680px;color:var(--text-muted);font-size:.96rem;line-height:1.9}.hero-tags{gap:7px;margin-top:28px}.hero-tag{padding:5px 9px;border:1px solid var(--border);border-radius:5px;background:rgba(255,255,255,.035);color:var(--text-muted);font:600 .64rem/1 "Consolas",monospace;letter-spacing:.03em}.hero-tag.primary{border-color:rgba(183,255,74,.36);background:rgba(183,255,74,.11);color:var(--accent)}.hero-meta{gap:0;margin-top:38px;padding-top:16px;border-top:1px solid var(--border)}.hero-meta-item{padding:0 18px;border-left:1px solid var(--border);color:var(--text-light);font:600 .64rem/1.4 "Consolas",monospace}.hero-meta-item:first-child{padding-left:0;border-left:0}
.stats-grid{gap:10px;margin-bottom:34px}.stat-card{padding:20px;border:1px solid var(--border);border-radius:12px;background:rgba(17,23,25,.72);box-shadow:none}.stat-card:hover{border-color:rgba(183,255,74,.45);transform:translateY(-2px);box-shadow:0 12px 28px rgba(0,0,0,.18)}.stat-num{color:var(--accent);font:800 2rem/1 "Aptos",sans-serif;letter-spacing:-.06em}.stat-label{margin-top:7px;color:var(--text-light);font:600 .65rem/1.2 "Consolas",monospace;letter-spacing:.08em;text-transform:uppercase}.operating-loop{padding:28px;border:1px solid rgba(183,255,74,.23);border-radius:14px;background:#111819;box-shadow:var(--shadow)}.operating-loop::after{background:radial-gradient(circle,rgba(183,255,74,.1),transparent 70%)}.operating-loop .block-heading span{color:var(--primary-light)}.operating-loop .block-heading strong{color:var(--text-light)}.loop-grid{gap:8px}.loop-card{min-height:148px;padding:16px;border:1px solid var(--border);border-radius:9px;background:rgba(255,255,255,.025)}.loop-card:hover{border-color:rgba(183,255,74,.36);background:rgba(183,255,74,.05)}.loop-step{color:var(--accent);font:700 .62rem/1 "Consolas",monospace}.loop-card h3{color:var(--primary-light);font-size:.95rem}.loop-card p{color:var(--text-muted)}.block-heading{margin-bottom:14px}.block-heading span{color:var(--primary-light);font-size:1.08rem}.block-heading strong{color:var(--text-light)}.learning-path{margin-top:42px}.path-grid{gap:10px}.path-card{padding:20px;border:1px solid var(--border);border-radius:12px;background:rgba(17,23,25,.72);box-shadow:none}.path-card::after{background:var(--accent);opacity:.7}.path-card:hover{border-color:rgba(183,255,74,.4);transform:translateY(-2px)}.path-card-kicker{color:var(--accent);font:700 .63rem/1.2 "Consolas",monospace;letter-spacing:.08em;text-transform:uppercase}.path-card p{color:var(--text-muted);font-size:.84rem}.path-card-links a{color:var(--accent);font:700 .72rem/1.3 "Consolas",monospace}.sections-grid{gap:10px;margin-top:12px}.section-card{border:1px solid var(--border);border-radius:12px;background:rgba(17,23,25,.72);box-shadow:none}.section-card:hover{border-color:rgba(183,255,74,.36);box-shadow:0 12px 34px rgba(0,0,0,.16)}.section-card-header{padding:17px 18px;border-bottom-color:var(--border)}.section-card-icon{color:var(--accent);font:700 .62rem/1 "Consolas",monospace;letter-spacing:.08em;text-transform:uppercase}.section-card-title{color:var(--primary-light);font-size:.86rem}.section-card-item{padding:11px 18px;border-bottom-color:var(--border)}.section-card-item-icon{color:var(--accent)}.section-card-item-link{color:var(--text-muted);font-size:.78rem}.section-card-item-link:hover{color:var(--accent)}.section-card-item-count{color:var(--text-light);font:600 .62rem/1 "Consolas",monospace}
.chapter-header{padding:32px 36px;border:1px solid rgba(183,255,74,.22);border-radius:14px;background:#111819;box-shadow:var(--shadow)}.chapter-header::before{width:4px;border-radius:4px;background:var(--accent)}.chapter-header-label{color:var(--accent);font:700 .66rem/1.2 "Consolas",monospace;letter-spacing:.1em;text-transform:uppercase}.chapter-header h1{color:var(--primary-light);font-size:clamp(1.8rem,3vw,3rem);line-height:1.04;letter-spacing:-.04em}.chapter-header p{color:var(--text-muted);font-size:.86rem}.article-content{padding:42px 48px;border:1px solid var(--border);border-radius:14px;background:rgba(17,23,25,.92);box-shadow:var(--shadow);color:var(--text-main);font-size:.96rem;line-height:1.92}.article-content h1{color:var(--primary-light);font-size:1.9rem;letter-spacing:-.03em}.article-content h2{padding-top:12px;color:var(--accent);font-size:1.25rem;letter-spacing:-.02em}.article-content h3{color:var(--primary-light);font-size:1rem}.article-content h4{color:var(--accent)}.article-content p,.article-content li{color:#c1cfca}.article-content strong{color:var(--primary-light)}.article-content a{color:var(--accent);text-decoration-color:rgba(183,255,74,.35)}.article-content a:hover{color:var(--primary-light)}.article-content hr{border-top-color:var(--border)}.article-content table{border:1px solid var(--border);border-radius:8px;overflow:hidden}.article-content thead{background:rgba(183,255,74,.1)}.article-content th{color:var(--accent);border-bottom-color:rgba(183,255,74,.22);font:700 .67rem/1.4 "Consolas",monospace;letter-spacing:.04em}.article-content td{color:#b8c7c1;border-bottom-color:var(--border)}.article-content tbody tr:nth-child(even){background:rgba(255,255,255,.025)}.article-content tbody tr:hover{background:rgba(183,255,74,.06)}.article-content code{border:1px solid rgba(183,255,74,.18);border-radius:4px;background:rgba(183,255,74,.08);color:var(--accent)}.article-content pre{border:1px solid var(--border);border-left:3px solid var(--accent);border-radius:8px;background:var(--code-bg);box-shadow:inset 0 0 40px rgba(183,255,74,.025)}.article-content pre code{border:0;background:transparent;color:#d8e5df}.article-content blockquote{border-left-color:var(--accent);background:rgba(183,255,74,.06);color:var(--text-muted)}
.article-share-panel{margin-top:30px;padding:20px;border:1px solid rgba(183,255,74,.24);border-radius:12px;background:#111819}.article-share-panel strong{color:var(--primary-light)}.article-share-panel p{color:var(--text-muted)}.share-wide-btn{border:1px solid rgba(183,255,74,.45);border-radius:7px;background:var(--accent);color:#0a0f0c;box-shadow:none;font:800 .7rem/1 "Consolas",monospace;letter-spacing:.04em;text-transform:uppercase}.share-wide-btn:hover{background:#d5ff9a}.footer-nav-label{color:var(--text-light);font:700 .62rem/1 "Consolas",monospace;letter-spacing:.1em;text-transform:uppercase}.footer-nav-link{color:var(--accent)}.footer-nav-title{color:var(--text-main)}.site-footer{padding:22px 42px;border-top-color:var(--border);background:#090d0e;color:var(--text-light);font:600 .64rem/1.5 "Consolas",monospace;letter-spacing:.04em}.footer-links a{color:var(--accent)}.back-to-top{width:40px;height:40px;right:24px;bottom:26px;border-radius:8px;background:var(--accent);color:#0a0f0c;box-shadow:0 8px 28px rgba(183,255,74,.18);font-weight:900}.back-to-top:hover{background:#d5ff9a}.toast{border:1px solid rgba(183,255,74,.3);border-radius:8px;background:#101718;color:var(--accent);box-shadow:var(--shadow-lg);font:700 .72rem/1.4 "Consolas",monospace}.sidebar-overlay{background:rgba(0,0,0,.68)}
@media(max-width:900px){body::after{display:none}.topbar{height:60px;padding:0 16px}#progress-bar{top:60px}.content{padding:28px 18px 62px}.hero{padding:38px 26px 32px}.hero h1{font-size:clamp(2.1rem,10vw,3.4rem)}.article-content{padding:30px 24px}.chapter-header{padding:26px 24px}.main>div:first-child{padding:7px 16px!important}}
@media(max-width:600px){.content{padding:20px 12px 54px}.hero{padding:30px 20px 26px;border-radius:12px}.hero-meta{display:grid;gap:9px}.hero-meta-item{padding:0 0 0 12px;border-left:1px solid var(--accent)}.operating-loop{padding:20px 14px}.article-content{padding:24px 18px;border-radius:11px;font-size:.91rem}.article-content h1{font-size:1.5rem}.site-footer{padding:18px 16px}}
@media(prefers-reduced-motion:reduce){*,*::before,*::after{scroll-behavior:auto!important;transition-duration:.01ms!important}}
@media print{body{background:#fff;color:#111}.article-content{color:#111;background:#fff}.article-content p,.article-content li,.article-content td{color:#222}}

/* SUPERONES / Apple-like editorial layer
   An original interpretation of the calm, spatial Apple web language:
   system type, pale surfaces, hairline borders, glass only where it helps. */
:root {
  --primary: #191A1D;
  --primary-light: #191A1D;
  --accent: #8B7BB8;
  --accent-teal: #8B7BB8;
  --bg-page: #FAFAF7;
  --bg-card: #ffffff;
  --bg-sidebar: rgba(255,255,255,.82);
  --text-main: #191A1D;
  --text-muted: #6e6e73;
  --text-light: #86868b;
  --border: rgba(0,0,0,.1);
  --code-bg: #F1EFEA;
  --shadow: 0 12px 34px rgba(0,0,0,.07);
  --shadow-lg: 0 22px 60px rgba(0,0,0,.11);
  --radius: 18px;
  --sidebar-w: 306px;
}
html { background: var(--bg-page); }
body {
  min-width: 320px;
  font-family: -apple-system, BlinkMacSystemFont, "SF Pro Display", "SF Pro Text", "Helvetica Neue", "PingFang SC", "Microsoft YaHei", sans-serif;
  background: #FAFAF7;
  color: var(--text-main);
  line-height: 1.72;
}
body::after { content: "superones"; color: rgba(0,0,0,.2); font: 700 9px/1 -apple-system,BlinkMacSystemFont,"Helvetica Neue",sans-serif; letter-spacing: .16em; }
.sidebar {
  background: var(--bg-sidebar);
  border-right: 1px solid rgba(0,0,0,.08);
  box-shadow: 8px 0 28px rgba(0,0,0,.04);
  backdrop-filter: saturate(150%) blur(20px);
}
.sidebar-logo { padding: 30px 22px 24px; border-bottom: 1px solid rgba(0,0,0,.08); gap: 12px; }
.sidebar-logo::before { width: 26px; height: 34px; border-radius: 0; margin-top: 1px; background: url('logo-mark.png') center/contain no-repeat; box-shadow: none; }
.sidebar-logo-text { color: var(--primary); font-size: .96rem; font-weight: 700; letter-spacing: -.02em; text-transform: none; }
.sidebar-logo-text span { margin-top: 7px; color: var(--text-light); font: 500 .66rem/1.4 -apple-system,BlinkMacSystemFont,"Helvetica Neue",sans-serif; letter-spacing: .02em; text-transform: none; }
.sidebar-search { padding: 18px 17px 14px; background: rgba(255,255,255,.62); border-bottom: 1px solid rgba(0,0,0,.07); }
.search-input { padding: 10px 13px; border: 1px solid rgba(0,0,0,.12); border-radius: 10px; background: rgba(255,255,255,.8); color: var(--text-main); font-size: .78rem; box-shadow: inset 0 1px 2px rgba(0,0,0,.03); }
.search-input::placeholder { color: #98989d; }
.search-input:focus { border-color: rgba(139,123,184,.7); box-shadow: 0 0 0 4px rgba(139,123,184,.14); }
.search-results { border-color: rgba(0,0,0,.1); border-radius: 12px; background: rgba(255,255,255,.96); box-shadow: var(--shadow-lg); }
.search-result { color: var(--text-main); border-bottom-color: rgba(0,0,0,.07); }
.search-result:hover { background: #FAFAF7; color: var(--accent); }
.search-result-title { color: var(--text-main); }.search-result-path,.search-result-snippet { color: var(--text-muted); }.search-result mark { background: #dbeafe; color: #004b96; }.search-empty { color: var(--text-muted); }
.sidebar-nav { padding: 16px 11px 34px; }
.nav-section { margin: 0 0 15px; padding: 8px 0 10px; border: 1px solid rgba(0,0,0,.08); border-radius: 14px; background: rgba(255,255,255,.46); }
.nav-section-title { margin: 0 10px 7px; padding: 4px 8px 11px; border-bottom-color: rgba(0,0,0,.08); font-size: .7rem; }
.part-prefix { padding: 3px 6px; border: 0; border-radius: 5px; background: #E7DEF6; color: #8B7BB8; font-size: .6rem; }
.part-stage { color: var(--text-light); font-size: .6rem; }
.nav-item { margin: 2px 6px; border-left: 2px solid transparent; border-radius: 8px; color: #68686d; transition: background .18s ease, color .18s ease, border-color .18s ease, transform .18s ease, box-shadow .18s ease; }
.nav-item:hover { color: #8B7BB8; background: #eaf3ff; border-left-color: var(--accent); transform: translateX(2px); box-shadow: 0 3px 10px rgba(139,123,184,.12); }
.nav-item.active { color: var(--accent); background: #e0efff; border-left-color: var(--accent); box-shadow: inset 0 0 0 1px rgba(139,123,184,.1), 0 3px 10px rgba(139,123,184,.1); }
.chapter-prefix { padding: 3px 5px; border: 0; border-radius: 5px; background: rgba(0,0,0,.045); color: var(--text-light); }.chapter-name { color: #68686d; }.nav-item .nav-count { background: rgba(0,0,0,.06); color: #88888d; border-radius: 5px; }.nav-item .nav-arrow { color: #7d7d82; }.nav-sub-items { padding-left: 9px; }.nav-item.sub-item { padding: 7px 13px 7px 21px; color: #7e7e83; }.nav-item.sub-item:hover { background: #f0f7ff; color: #8B7BB8; }.nav-item.sub-item.active { color: #191A1D; background: #e7f2ff; border-left-color: var(--accent); }.nav-item.active .nav-label { color: #191A1D; }.chapter-toggle.active .chapter-name { color: #191A1D; }.chapter-toggle.active .chapter-prefix { color: #191A1D; background: #d7e8fb; border-color: transparent; }.nav-item.active .nav-count { color: #4e4e53; background: #d4e3f5; }.nav-item.active .nav-arrow { color: #4e4e53; }
.main { background: transparent; }.main > div:first-child { padding: 8px 28px !important; background: #fff !important; color: #6e6e73 !important; border-bottom: 1px solid #d2d2d7 !important; font: 600 .67rem/1.4 -apple-system,BlinkMacSystemFont,"Helvetica Neue",sans-serif; letter-spacing: .03em; text-transform: none; }
.topbar { height: 68px; padding: 0 42px; background: rgba(245,245,247,.76); border-bottom: 1px solid rgba(0,0,0,.08); box-shadow: 0 1px 0 rgba(255,255,255,.8); backdrop-filter: saturate(180%) blur(20px); }
.topbar-left strong { color: var(--primary); font-size: .8rem; font-weight: 700; letter-spacing: -.01em; text-transform: none; }.breadcrumb { font-size: .71rem; }.breadcrumb a { color: var(--accent); }.breadcrumb-sep { color: #a1a1a6; }.breadcrumb-current { color: var(--primary); }.topbar-right { gap: 8px; }.topbar-btn { padding: 8px 13px; border: 0; border-radius: 999px; background: #fff; color: #5e5e63; box-shadow: 0 1px 3px rgba(0,0,0,.09); font-size: .69rem; font-weight: 600; }.topbar-btn:hover { background: #E7DEF6; color: var(--accent); border-color: transparent; }.print-btn.topbar-tool { color: var(--text-light); font-size: .64rem; letter-spacing: .01em; text-transform: none; }#progress-bar { top: 68px; left: var(--sidebar-w); height: 2px; background: rgba(0,0,0,.06); }#progress-bar .bar { background: var(--accent); }
.content { padding: 56px 48px 90px; }.content-inner { max-width: 1000px; }.hero { margin-bottom: 28px; padding: 64px 58px 48px; border: 0; border-radius: 24px; background: #fff; box-shadow: var(--shadow-lg); }.hero::before { top: -25%; right: -6%; width: 400px; height: 400px; background: radial-gradient(circle, rgba(139,123,184,.13), transparent 70%); }.hero::after { display: none; }.hero-label { padding: 0; margin-bottom: 18px; background: transparent; color: var(--accent); font: 700 .68rem/1.2 -apple-system,BlinkMacSystemFont,"Helvetica Neue",sans-serif; letter-spacing: .05em; text-transform: uppercase; }.hero h1 { max-width: 780px; margin-bottom: 20px; color: var(--primary); font-size: clamp(2.5rem, 5vw, 5.2rem); line-height: 1.02; letter-spacing: -.065em; }.hero-desc { max-width: 670px; color: var(--text-muted); font-size: 1rem; line-height: 1.85; }.hero-tags { gap: 8px; margin-top: 28px; }.hero-tag { padding: 7px 12px; border: 0; border-radius: 999px; background: #FAFAF7; color: #6e6e73; font-size: .69rem; }.hero-tag.primary { background: #E7DEF6; color: #8B7BB8; border: 0; }.hero-meta { gap: 0; margin-top: 38px; padding-top: 18px; border-top: 1px solid rgba(0,0,0,.08); }.hero-meta-item { padding: 0 18px; border-left-color: rgba(0,0,0,.1); color: var(--text-light); font-size: .68rem; }.hero-meta-item:first-child { padding-left: 0; border-left: 0; }
.stats-grid { gap: 12px; margin-bottom: 34px; }.stat-card { padding: 22px 20px; border: 0; border-radius: 16px; background: rgba(255,255,255,.78); box-shadow: 0 1px 3px rgba(0,0,0,.05); }.stat-card:hover { border-color: transparent; transform: translateY(-2px); box-shadow: var(--shadow); }.stat-num { color: var(--primary); font-size: 2.1rem; font-weight: 700; }.stat-label { margin-top: 8px; color: var(--text-light); font-size: .68rem; letter-spacing: .01em; text-transform: none; }.operating-loop { padding: 30px; border: 0; border-radius: 20px; background: #191A1D; box-shadow: var(--shadow-lg); }.operating-loop::after { background: radial-gradient(circle, rgba(139,123,184,.3), transparent 70%); }.operating-loop .block-heading span { color: #fff; }.operating-loop .block-heading strong { color: #a1a1a6; }.loop-grid { gap: 10px; }.loop-card { min-height: 148px; padding: 18px; border: 1px solid rgba(255,255,255,.14); border-radius: 14px; background: rgba(255,255,255,.07); }.loop-card:hover { border-color: rgba(255,255,255,.32); background: rgba(255,255,255,.11); }.loop-step { color: #B9A8E8; font-size: .68rem; }.loop-card h3 { color: #fff; font-size: .98rem; }.loop-card p { color: #b1b1b6; }.block-heading { margin-bottom: 16px; }.block-heading span { color: var(--primary); font-size: 1.1rem; }.block-heading strong { color: var(--text-light); }.learning-path { margin-top: 44px; }.path-grid { gap: 12px; }.path-card { padding: 22px; border: 0; border-radius: 16px; background: #fff; box-shadow: 0 1px 3px rgba(0,0,0,.05); }.path-card::after { background: var(--accent); opacity: 1; }.path-card:hover { border-color: transparent; transform: translateY(-2px); box-shadow: var(--shadow); }.path-card-kicker { color: var(--accent); font-size: .68rem; font-weight: 700; letter-spacing: .02em; text-transform: none; }.path-card p { color: var(--text-muted); font-size: .85rem; }.path-card-links a { color: var(--accent); font-size: .74rem; }.sections-grid { gap: 12px; margin-top: 14px; }.section-card { border: 0; border-radius: 16px; background: #fff; box-shadow: 0 1px 3px rgba(0,0,0,.05); }.section-card:hover { border-color: transparent; box-shadow: var(--shadow); }.section-card-header { padding: 18px 20px; border-bottom: 1px solid rgba(0,0,0,.07); }.section-card-icon { color: var(--accent); font-size: .68rem; letter-spacing: .01em; text-transform: none; }.section-card-title { color: var(--primary); font-size: .88rem; }.section-card-item { padding: 12px 20px; border-bottom-color: rgba(0,0,0,.07); }.section-card-item-icon { color: #a1a1a6; }.section-card-item-link { color: #606065; font-size: .79rem; }.section-card-item-link:hover { color: var(--accent); }.section-card-item-count { color: #98989d; font-size: .66rem; }
.chapter-header { padding: 34px 38px; border: 0; border-radius: 18px; background: #fff; box-shadow: var(--shadow); }.chapter-header::before { width: 4px; border-radius: 4px; background: var(--accent); }.chapter-header-label { color: var(--accent); font-size: .68rem; letter-spacing: .04em; text-transform: none; }.chapter-header h1 { color: var(--primary); font-size: clamp(1.9rem, 3.2vw, 3.2rem); line-height: 1.04; letter-spacing: -.055em; }.chapter-header p { color: var(--text-muted); font-size: .88rem; }.article-content { padding: 46px 52px; border: 0; border-radius: 18px; background: #fff; box-shadow: var(--shadow); color: var(--text-main); font-size: .98rem; line-height: 1.95; }.article-content h1 { color: var(--primary); font-size: 2rem; letter-spacing: -.04em; }.article-content h2 { padding-top: 14px; color: var(--primary); font-size: 1.3rem; letter-spacing: -.025em; }.article-content h3 { color: var(--primary); font-size: 1.03rem; }.article-content h4 { color: var(--accent); }.article-content p,.article-content li { color: #424245; }.article-content strong { color: var(--primary); }.article-content a { color: var(--accent); text-decoration-color: rgba(139,123,184,.25); }.article-content a:hover { color: #0056ad; }.article-content hr { border-top-color: rgba(0,0,0,.1); }.article-content table { border: 1px solid rgba(0,0,0,.1); border-radius: 9px; overflow: hidden; }.article-content thead { background: #FAFAF7; }.article-content th { color: var(--primary); border-bottom-color: rgba(0,0,0,.1); font-size: .7rem; }.article-content td { color: #515154; border-bottom-color: rgba(0,0,0,.08); }.article-content tbody tr:nth-child(even) { background: #fafafa; }.article-content tbody tr:hover { background: #f2f7fd; }.article-content code { border: 0; border-radius: 5px; background: #F1EFEA; color: #0056ad; }.article-content pre { border: 0; border-left: 3px solid var(--accent); border-radius: 9px; background: #FAFAF7; box-shadow: none; }.article-content pre code { background: transparent; color: #2d2d2f; }.article-content blockquote { border-left-color: var(--accent); background: #f2f7fd; color: var(--text-muted); }
.article-share-panel { margin-top: 30px; padding: 22px; border: 0; border-radius: 16px; background: #fff; box-shadow: 0 1px 3px rgba(0,0,0,.05); }.article-share-panel strong { color: var(--primary); }.article-share-panel p { color: var(--text-muted); }.share-wide-btn { border: 0; border-radius: 999px; background: var(--accent); color: #fff; box-shadow: none; font-size: .72rem; font-weight: 700; }.share-wide-btn:hover { background: #0077ed; }.footer-nav-label { color: var(--text-light); font-size: .65rem; }.footer-nav-link { color: var(--accent); }.footer-nav-title { color: var(--primary); }.site-footer { padding: 24px 42px; border-top-color: rgba(0,0,0,.08); background: rgba(255,255,255,.62); color: var(--text-light); font-size: .66rem; }.footer-links a { color: var(--accent); }.back-to-top { width: 40px; height: 40px; right: 24px; bottom: 26px; border-radius: 50%; background: var(--primary); color: #fff; box-shadow: var(--shadow); }.back-to-top:hover { background: var(--accent); }.toast { border: 0; border-radius: 10px; background: rgba(29,29,31,.92); color: #fff; box-shadow: var(--shadow-lg); font-size: .75rem; }
@media(max-width:900px){body::after{display:none}.topbar{height:60px;padding:0 16px}#progress-bar{top:60px}.content{padding:30px 18px 64px}.hero{padding:40px 28px 32px}.hero h1{font-size:clamp(2.3rem,10vw,3.7rem)}.article-content{padding:32px 26px}.chapter-header{padding:28px 24px}.main>div:first-child{padding:7px 16px!important}}
@media(max-width:600px){.content{padding:20px 12px 54px}.hero{padding:30px 20px 26px;border-radius:18px}.hero-meta{display:grid;gap:9px}.hero-meta-item{padding:0 0 0 12px;border-left:2px solid var(--accent)}.operating-loop{padding:22px 16px;border-radius:16px}.article-content{padding:25px 18px;border-radius:14px;font-size:.93rem}.article-content h1{font-size:1.55rem}.site-footer{padding:18px 16px}}
@media(prefers-reduced-transparency:reduce){.sidebar,.topbar{backdrop-filter:none;background:var(--bg-card)}}
@media(prefers-reduced-motion:reduce){*,*::before,*:after{scroll-behavior:auto!important;transition-duration:.01ms!important}}
@media print{body{background:#fff;color:#111}.article-content{color:#111;background:#fff}.article-content p,.article-content li,.article-content td{color:#222}}

.topbar-home{color:var(--accent);font-weight:700}

/* ===== 系统性动效（阅读工具克制版） ===== */
a, button { transition: color .18s, background .18s, border-color .18s, transform .18s, opacity .18s; }
.nav-item:hover { transform: translateX(3px); }
.section-card-item-link:hover, .footer-nav-link:hover { transform: translateX(2px); }
.stat-card:hover, .path-card:hover, .loop-card:hover, .pillar:hover { transform: translateY(-4px); }
.article-content a:hover { opacity: .75; }
.topbar-btn:hover, .back-to-top:hover { transform: translateY(-2px); }
@keyframes kbFadeUp { from { opacity: 0; transform: translateY(14px); } to { opacity: 1; transform: none; } }
.content-inner > * { animation: kbFadeUp .55s cubic-bezier(.16,1,.3,1) both; }
.content-inner > *:nth-child(2) { animation-delay: .06s; }
.content-inner > *:nth-child(3) { animation-delay: .12s; }
.content-inner > *:nth-child(4) { animation-delay: .18s; }
.content-inner > *:nth-child(5) { animation-delay: .24s; }
@media (prefers-reduced-motion: reduce) {
  a, button, .nav-item, .section-card-item-link, .stat-card, .path-card, .loop-card, .pillar, .article-content a, .topbar-btn, .back-to-top { transition: none; }
  .content-inner > * { animation: none; }
}

/* ===== 官网统一导航栏 ===== */
:root{--nav-h:56px}
.site-nav{position:fixed;top:0;left:0;right:0;z-index:300;background:rgba(250,250,247,.92);backdrop-filter:blur(10px);border-bottom:1px solid rgba(25,26,29,.1);height:var(--nav-h)}
.site-nav-inner{max-width:1180px;margin:0 auto;padding:0 24px;height:100%;display:flex;align-items:center;justify-content:space-between;gap:24px}
.site-brand{display:inline-flex;align-items:center;gap:10px;text-decoration:none}
.site-brand img{height:24px;width:auto}
.site-brand span{font-weight:900;font-size:20px;letter-spacing:-.02em;color:#191A1D}
.site-nav-links{display:flex;gap:22px;align-items:center}
.site-nav-links a{font-size:14px;color:#4a4b50;text-decoration:none}
.site-nav-links a:hover{color:#191A1D}
.sidebar{top:var(--nav-h)!important}
.main{padding-top:var(--nav-h)}
@media(max-width:880px){.site-nav-links{display:none}}