/* 莲花演说 · 演讲知识中心（Hub + 文章）
 * 纯 CSS 视觉；正文与链接均在 HTML 中，不依赖 JS，不影响爬虫
 */
:root {
  --kn-ink: #152018;
  --kn-ink-soft: #2a3a2f;
  --kn-paper: #f3efe6;
  --kn-paper-2: #ebe4d6;
  --kn-card: #fffcf7;
  --kn-line: rgba(21, 32, 24, 0.12);
  --kn-muted: #5f6b62;
  --kn-accent: #c45c26;
  --kn-accent-deep: #9a3f12;
  --kn-sage: #4f6f5a;
  --kn-display: "Noto Serif SC", "Literata", serif;
  --kn-body: "Noto Sans SC", sans-serif;
  --kn-mono: "Literata", "Noto Serif SC", serif;
}

.kn-page {
  background: var(--kn-paper);
  color: var(--kn-ink);
  font-family: var(--kn-body);
  min-height: 100vh;
  /* 全站 header 为 fixed，给面包屑与首屏留出空间 */
  padding-top: 80px;
}
.kn-page .site-header {
  background: rgba(255, 252, 247, 0.92);
  border-bottom: 1px solid var(--kn-line);
  backdrop-filter: blur(8px);
}
.kn-wrap {
  width: min(1120px, calc(100% - 40px));
  margin: 0 auto;
}

/* —— Hero —— */
.kn-hero {
  position: relative;
  overflow: hidden;
  padding: 56px 0 48px;
  border-bottom: 1px solid var(--kn-line);
}
.kn-hero-bg {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse 80% 60% at 12% 20%, rgba(196, 92, 38, 0.14), transparent 55%),
    radial-gradient(ellipse 70% 50% at 88% 10%, rgba(79, 111, 90, 0.16), transparent 50%),
    linear-gradient(180deg, #e8e1d2 0%, var(--kn-paper) 100%);
  pointer-events: none;
}
.kn-hero-bg::after {
  content: "";
  position: absolute;
  inset: 0;
  opacity: 0.35;
  background-image:
    linear-gradient(rgba(21, 32, 24, 0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(21, 32, 24, 0.04) 1px, transparent 1px);
  background-size: 28px 28px;
  mask-image: linear-gradient(180deg, #000 30%, transparent 95%);
}
.kn-hero-inner { position: relative; z-index: 1; max-width: 760px; }
.kn-breadcrumb {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  align-items: center;
  font-size: 13px;
  color: var(--kn-muted);
  margin: 0 0 18px;
}
.kn-breadcrumb a { color: var(--kn-ink-soft); text-decoration: none; }
.kn-breadcrumb a:hover { color: var(--kn-accent); }
.kn-kicker {
  margin: 0 0 10px;
  font-family: var(--kn-mono);
  font-size: 13px;
  font-weight: 500;
  letter-spacing: 0.14em;
  color: var(--kn-accent-deep);
}
.kn-hero h1 {
  margin: 0 0 14px;
  font-family: var(--kn-display);
  font-size: clamp(36px, 6vw, 56px);
  font-weight: 700;
  line-height: 1.15;
  letter-spacing: -0.02em;
  color: var(--kn-ink);
}
.kn-hub-lead {
  margin: 0 0 28px;
  max-width: 36em;
  font-size: 17px;
  line-height: 1.75;
  color: var(--kn-ink-soft);
}
.kn-hero-meta {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 10px 28px;
  margin: 0;
  padding: 0;
}
.kn-hero-meta li {
  display: flex;
  flex-direction: column;
  gap: 2px;
  min-width: 88px;
}
.kn-hero-meta strong {
  font-family: var(--kn-display);
  font-size: 28px;
  font-weight: 700;
  color: var(--kn-ink);
  line-height: 1.1;
}
.kn-hero-meta span {
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--kn-muted);
}

/* —— Sections —— */
.kn-section { padding: 48px 0 20px; }
.kn-sec-head { margin-bottom: 22px; }
.kn-sec-head-row {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-end;
  justify-content: space-between;
  gap: 12px;
}
.kn-sec-label {
  margin: 0 0 6px;
  font-size: 12px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--kn-sage);
  font-weight: 600;
}
.kn-sec-head h2 {
  margin: 0;
  font-family: var(--kn-display);
  font-size: clamp(24px, 3vw, 32px);
  font-weight: 700;
  line-height: 1.25;
}
.kn-sec-lead {
  margin: 8px 0 0;
  font-size: 15px;
  color: var(--kn-muted);
  line-height: 1.6;
}
.kn-filter-clear {
  font-size: 13px;
  color: var(--kn-accent-deep);
  text-decoration: none;
  border-bottom: 1px solid rgba(196, 92, 38, 0.35);
  padding-bottom: 2px;
}
.kn-filter-clear:hover { color: var(--kn-accent); }

/* —— List layout —— */
.kn-section-list {
  padding: 8px 0 72px;
  position: relative;
}
.kn-section-list::before {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  top: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--kn-line), transparent);
}
.kn-list-layout {
  display: grid;
  grid-template-columns: 240px minmax(0, 1fr);
  gap: 28px 40px;
  align-items: start;
}
.kn-rail {
  position: sticky;
  top: 96px;
  padding: 22px 20px 20px;
  background:
    linear-gradient(165deg, rgba(255, 252, 247, 0.92) 0%, rgba(231, 239, 232, 0.95) 100%);
  border: 1px solid rgba(79, 111, 90, 0.2);
  border-radius: 4px 18px 18px 4px;
  border-left: 3px solid var(--kn-sage);
  box-shadow: 0 12px 32px rgba(21, 32, 24, 0.04);
}
.kn-rail-title {
  margin: 0 0 14px;
  font-family: var(--kn-display);
  font-size: 17px;
  font-weight: 700;
}
.kn-rail-steps {
  margin: 0 0 18px;
  padding: 0;
  list-style: none;
  counter-reset: kn-step;
}
.kn-rail-steps li {
  position: relative;
  padding: 0 0 12px 28px;
  font-size: 13px;
  line-height: 1.55;
  color: var(--kn-ink-soft);
  counter-increment: kn-step;
}
.kn-rail-steps li:last-child { padding-bottom: 0; }
.kn-rail-steps li::before {
  content: counter(kn-step);
  position: absolute;
  left: 0;
  top: 0;
  width: 20px;
  height: 20px;
  border-radius: 50%;
  background: rgba(79, 111, 90, 0.12);
  color: var(--kn-sage);
  font-size: 11px;
  font-weight: 700;
  display: grid;
  place-items: center;
  font-family: var(--kn-mono);
}
.kn-rail-note {
  margin: 0 0 16px;
  padding-top: 14px;
  border-top: 1px dashed rgba(79, 111, 90, 0.28);
  font-size: 12px;
  line-height: 1.55;
  color: var(--kn-muted);
}
.kn-rail-links {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin: 0;
}
.kn-rail-links a {
  font-size: 13px;
  color: var(--kn-accent-deep);
  text-decoration: none;
  font-weight: 500;
}
.kn-rail-links a:hover { text-decoration: underline; }

.kn-list-main {
  min-width: 0;
  padding: 8px 4px 8px 8px;
}
.kn-list {
  list-style: none;
  margin: 12px 0 0;
  padding: 0;
  background: var(--kn-card);
  border: 1px solid var(--kn-line);
  border-radius: 4px 20px 4px 20px;
  overflow: hidden;
  box-shadow: 0 18px 40px rgba(21, 32, 24, 0.05);
}
.kn-list > li {
  border-bottom: 1px solid var(--kn-line);
}
.kn-list > li:last-child { border-bottom: 0; }
.kn-entry-link {
  display: grid;
  grid-template-columns: 64px minmax(0, 1fr) auto;
  gap: 8px 18px;
  align-items: start;
  padding: 22px 22px 20px 18px;
  text-decoration: none;
  color: inherit;
  position: relative;
  transition: background 0.28s ease, padding-left 0.28s ease;
}
.kn-entry-link::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 0;
  background: linear-gradient(180deg, var(--kn-accent) 0%, var(--kn-sage) 100%);
  transition: width 0.28s ease;
}
.kn-entry-link:hover {
  background: linear-gradient(90deg, rgba(255, 248, 241, 0.95), rgba(255, 252, 247, 0.4));
  padding-left: 22px;
}
.kn-entry-link:hover::before { width: 3px; }
.kn-entry-link:hover h3 { color: var(--kn-accent-deep); }
.kn-entry-index {
  font-family: var(--kn-mono);
  font-size: 22px;
  font-weight: 700;
  color: rgba(79, 111, 90, 0.55);
  padding-top: 2px;
  letter-spacing: 0.02em;
  line-height: 1;
  transition: color 0.25s ease;
}
.kn-entry-link:hover .kn-entry-index { color: var(--kn-accent); }
.kn-entry-body { min-width: 0; }
.kn-entry-body h3 {
  margin: 0 0 8px;
  font-family: var(--kn-display);
  font-size: clamp(18px, 2.2vw, 22px);
  font-weight: 700;
  line-height: 1.35;
  letter-spacing: -0.01em;
  transition: color 0.25s ease;
}
.kn-entry-body p {
  margin: 0 0 12px;
  font-size: 14px;
  line-height: 1.7;
  color: var(--kn-ink-soft);
  max-width: 42em;
}
.kn-entry-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 0;
  font-size: 12px;
  color: var(--kn-muted);
}
.kn-entry-meta span {
  position: relative;
  padding-right: 14px;
  margin-right: 14px;
}
.kn-entry-meta span:not(:last-child)::after {
  content: "";
  position: absolute;
  right: 0;
  top: 50%;
  width: 3px;
  height: 3px;
  border-radius: 50%;
  background: rgba(95, 107, 98, 0.45);
  transform: translateY(-50%);
}
.kn-entry-go {
  align-self: center;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.12em;
  color: var(--kn-accent-deep);
  opacity: 0;
  transform: translateX(-6px);
  transition: opacity 0.25s ease, transform 0.25s ease;
  white-space: nowrap;
}
.kn-entry-link:hover .kn-entry-go {
  opacity: 1;
  transform: translateX(0);
}
.kn-empty {
  margin: 12px 0 0;
  padding: 32px 24px;
  font-size: 15px;
  line-height: 1.7;
  color: var(--kn-ink-soft);
  background: var(--kn-card);
  border: 1px dashed var(--kn-line);
  border-radius: 12px;
}
.kn-empty a { color: var(--kn-accent-deep); }
.kn-note {
  margin: 22px 0 0;
  font-size: 13px;
  line-height: 1.65;
  color: var(--kn-muted);
}
.kn-note a { color: var(--kn-accent-deep); }

/* Topic cards polish */
.kn-topics {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
}
.kn-topic-card {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 14px;
  align-items: start;
  min-height: 132px;
  padding: 18px 18px 16px;
  background: var(--kn-card);
  border: 1px solid var(--kn-line);
  border-radius: 4px 16px 4px 16px;
  text-decoration: none;
  color: inherit;
  box-shadow: 0 1px 0 rgba(255, 255, 255, 0.7) inset;
  transition: transform 0.28s ease, border-color 0.28s ease, box-shadow 0.28s ease;
}
.kn-topic-card:hover {
  transform: translateY(-3px);
  border-color: rgba(196, 92, 38, 0.4);
  box-shadow: 0 14px 32px rgba(21, 32, 24, 0.08);
}
.kn-topic-card.is-active {
  border-color: var(--kn-accent);
  background: linear-gradient(160deg, #fff8f1 0%, var(--kn-card) 55%);
  box-shadow: 0 0 0 1px rgba(196, 92, 38, 0.12), 0 12px 28px rgba(154, 63, 18, 0.08);
}
.kn-topic-code {
  font-family: var(--kn-mono);
  font-size: 22px;
  font-weight: 700;
  color: var(--kn-sage);
  line-height: 1;
  padding-top: 2px;
}
.kn-topic-body { display: flex; flex-direction: column; gap: 6px; min-width: 0; }
.kn-topic-body strong {
  font-family: var(--kn-display);
  font-size: 18px;
  font-weight: 700;
  line-height: 1.3;
}
.kn-topic-desc {
  font-size: 13px;
  line-height: 1.55;
  color: var(--kn-muted);
}
.kn-topic-count {
  margin-top: auto;
  padding-top: 8px;
  font-size: 12px;
  letter-spacing: 0.04em;
  color: var(--kn-accent-deep);
}

.kn-footer {
  border-top: 1px solid var(--kn-line);
  padding: 28px 0;
  text-align: center;
  font-size: 13px;
  color: var(--kn-muted);
}
.kn-footer p { margin: 0; }
.kn-footer .footer-hub-nav {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 8px 24px;
  margin: 0 0 16px;
}
.kn-footer .footer-hub-nav a {
  color: var(--kn-accent-deep);
  text-decoration: none;
}
.kn-footer .footer-hub-nav a:hover { text-decoration: underline; }

/* —— Article detail (static pages) —— */
.kn-detail .kn-detail-main {
  padding: 8px 0 72px;
}
.kn-detail-wrap {
  width: min(860px, calc(100% - 40px));
  margin: 0 auto;
}
.kn-detail-hero {
  margin: 0 0 24px;
  padding: 22px 0 20px;
  border-bottom: 1px solid var(--kn-line);
}
.kn-detail-hero .kn-breadcrumb {
  margin-bottom: 14px;
}
.kn-detail-hero .kn-kicker {
  margin: 0 0 10px;
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.12em;
  color: var(--kn-accent-deep);
}
.kn-detail-hero h1 {
  margin: 0 0 14px;
  font-family: var(--kn-display);
  font-size: clamp(30px, 4.5vw, 44px);
  line-height: 1.22;
  font-weight: 700;
}
.kn-detail-lead {
  margin: 0 0 16px;
  font-size: 16px;
  line-height: 1.7;
  color: var(--kn-ink-soft);
  max-width: 40em;
}
.kn-detail-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 0;
  padding: 0;
  list-style: none;
}
.kn-detail-meta li {
  padding: 6px 10px;
  background: var(--kn-card);
  border: 1px solid var(--kn-line);
  font-size: 12px;
  color: var(--kn-muted);
}
.kn-detail-meta strong {
  color: var(--kn-ink-soft);
  font-weight: 600;
}
.kn-body-panel {
  margin: 0 0 28px;
  padding: 8px 0 4px;
}
.kn-body {
  margin-top: 8px;
  font-size: 16px;
  line-height: 1.9;
  color: var(--kn-ink-soft);
}
.kn-body h2 {
  font-family: var(--kn-display);
  font-size: 22px;
  color: var(--kn-ink);
  margin: 36px 0 12px;
  padding-top: 8px;
  border-top: 1px solid rgba(21, 32, 24, 0.08);
}
.kn-body h2:first-child {
  border-top: 0;
  padding-top: 0;
  margin-top: 12px;
}
.kn-body h3 { font-size: 17px; margin: 24px 0 10px; color: var(--kn-ink); }
.kn-body p { margin: 0 0 14px; }
.kn-body ul, .kn-body ol { margin: 0 0 16px; padding-left: 1.25em; }
.kn-aside {
  margin-top: 0;
  padding: 20px 22px;
  background: linear-gradient(180deg, #f7f3ea 0%, var(--kn-card) 100%);
  border: 1px solid var(--kn-line);
}
.kn-aside-title {
  margin: 0 0 12px;
  font-family: var(--kn-display);
  font-size: 16px;
}
.kn-related {
  font-size: 14px;
  line-height: 1.7;
  margin: 0 0 10px;
  display: flex;
  flex-wrap: wrap;
  gap: 6px 10px;
}
.kn-related:last-child { margin-bottom: 0; }
.kn-related strong {
  display: inline-block;
  min-width: 4.5em;
  font-size: 12px;
  letter-spacing: 0.04em;
  color: var(--kn-muted);
  font-weight: 600;
}
.kn-related a { color: var(--kn-accent-deep); font-weight: 600; }
.kn-related a:hover { text-decoration: underline; }

/* Knowledge 证据闭环：正文后主模块，不可错过 */
.kn-loop {
  margin: 28px 0 8px;
  padding: 26px 24px 22px;
  background:
    linear-gradient(180deg, rgba(255, 248, 238, 0.95) 0%, #fff 55%),
    radial-gradient(120% 80% at 0% 0%, rgba(176, 48, 36, 0.06), transparent 55%);
  border: 1px solid rgba(21, 32, 24, 0.12);
  border-left: 4px solid var(--kn-accent, #b03024);
}
.kn-loop-eyebrow {
  margin: 0 0 6px;
  font-size: 12px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--kn-accent-deep, #8c241a);
  font-weight: 700;
}
.kn-loop-title {
  margin: 0 0 8px;
  font-family: var(--kn-display);
  font-size: clamp(20px, 2.4vw, 26px);
  line-height: 1.35;
  color: var(--kn-ink);
}
.kn-loop-lead {
  margin: 0 0 18px;
  font-size: 14px;
  line-height: 1.7;
  color: var(--kn-muted);
  max-width: 40em;
}
.kn-loop-block {
  margin: 0 0 16px;
  padding-bottom: 14px;
  border-bottom: 1px solid rgba(21, 32, 24, 0.08);
}
.kn-loop-block:last-of-type {
  border-bottom: 0;
  padding-bottom: 0;
}
.kn-loop-label {
  margin: 0 0 8px;
  font-size: 13px;
  letter-spacing: 0.06em;
  color: var(--kn-muted);
  font-weight: 700;
}
.kn-loop-course {
  margin: 0;
  font-family: var(--kn-display);
  font-size: 20px;
  line-height: 1.4;
}
.kn-loop-course a {
  color: var(--kn-accent-deep, #8c241a);
  text-decoration: none;
  font-weight: 700;
}
.kn-loop-course a:hover {
  text-decoration: underline;
}
.kn-loop-list {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 8px;
}
.kn-loop-list a {
  display: inline-block;
  color: var(--kn-ink);
  font-weight: 600;
  font-size: 15px;
  line-height: 1.45;
  text-decoration: none;
  border-bottom: 1px solid rgba(176, 48, 36, 0.25);
}
.kn-loop-list a:hover {
  color: var(--kn-accent-deep, #8c241a);
  border-bottom-color: currentColor;
}
.kn-loop-more {
  margin: 18px 0 0;
  font-size: 13px;
  color: var(--kn-muted);
}
.kn-loop-more a {
  color: var(--kn-accent-deep, #8c241a);
  font-weight: 600;
}
@media (min-width: 720px) {
  .kn-loop {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 8px 28px;
    padding: 28px 28px 24px;
  }
  .kn-loop-eyebrow,
  .kn-loop-title,
  .kn-loop-lead,
  .kn-loop-more {
    grid-column: 1 / -1;
  }
  .kn-loop-block--course {
    grid-column: 1 / -1;
  }
}

/* legacy shell until regenerated */
.kn-main {
  width: min(860px, calc(100% - 40px));
  margin: 0 auto;
  padding: 24px 0 72px;
}
.kn-article .kn-kicker {
  font-size: 13px;
  letter-spacing: 0.1em;
  color: var(--kn-accent-deep);
  margin: 0 0 10px;
}
.kn-article h1 {
  font-family: var(--kn-display);
  font-size: clamp(28px, 4vw, 40px);
  line-height: 1.25;
  margin: 0 0 12px;
}
.kn-meta-line { font-size: 13px; color: var(--kn-muted); margin: 0 0 8px; }

@media (max-width: 960px) {
  .kn-topics { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .kn-list-layout { grid-template-columns: 1fr; gap: 24px; }
  .kn-rail { position: static; }
}
@media (max-width: 640px) {
  .kn-wrap,
  .kn-detail-wrap { width: calc(100% - 32px); }
  .kn-hero { padding: 36px 0 32px; }
  .kn-topics { grid-template-columns: 1fr; }
  .kn-entry-link {
    grid-template-columns: 44px minmax(0, 1fr);
    padding: 18px 16px;
  }
  .kn-entry-link:hover { padding-left: 18px; }
  .kn-entry-go { display: none; }
  .kn-entry-index { font-size: 18px; }
  .kn-hero-meta strong { font-size: 24px; }
  .kn-section { padding: 36px 0 12px; }
  .kn-list { border-radius: 12px; }
}

/* Knowledge FAQ */
.kn-faq {
  width: min(880px, calc(100% - 40px));
  margin: 8px auto 36px;
  padding: 28px 0 8px;
}
.kn-faq h2 {
  margin: 0 0 18px;
  font-family: "Noto Serif SC", Literata, serif;
  font-size: 24px;
}
.kn-faq-item {
  padding: 14px 0;
  border-top: 1px solid rgba(20, 24, 28, 0.1);
}
.kn-faq-item h3 {
  margin: 0 0 8px;
  font-size: 16px;
  font-weight: 600;
}
.kn-faq-item p {
  margin: 0;
  font-size: 14px;
  line-height: 1.7;
  color: #4b5563;
}

@media (prefers-reduced-motion: reduce) {
  .kn-topic-card,
  .kn-entry-link,
  .kn-entry-go,
  .kn-entry-link::before {
    transition: none;
  }
  .kn-topic-card:hover,
  .kn-entry-link:hover { transform: none; padding-left: 18px; }
}