/* SGT 空能引力理论 · 双语学术静态官网 sgt.ac.cn */
/* #004792 | #222222 | #666666 | #FFFFFF | #EEEEEE */

@import url('https://fonts.googleapis.com/css2?family=Noto+Serif+SC:wght@500;700&family=Source+Serif+4:ital,wght@0,500;0,600;0,700;1,400&display=swap');
/* 字体加载失败时回退到系统衬线/黑体，避免国内网络阻断 Google Fonts 时版式崩溃 */

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

html { font-size: 16px; scroll-behavior: smooth; }
html.lang-en .lang-zh { display: none !important; }
html.lang-zh .lang-en { display: none !important; }
html.lang-switching body { opacity: 0.88; transition: opacity 0.15s ease; }

body {
  font-family: "Microsoft YaHei", "PingFang SC", "Source Han Sans SC", "Noto Sans SC", system-ui, sans-serif;
  background: #ffffff; color: #222222; line-height: 1.8;
  min-height: 100vh; display: flex; flex-direction: column;
  position: relative;
}

/* 引力场 Canvas 背景 */
#gravity-canvas {
  position: fixed; top: 0; left: 0; width: 100%; height: 100%;
  z-index: 0; pointer-events: none;
}
html.lang-en body { font-family: "Source Serif 4", "Times New Roman", Georgia, serif; }
html.lang-zh .hero-title,
html.lang-zh .page-title,
html.lang-zh .section-title { font-family: "Noto Serif SC", "Songti SC", "SimSun", serif; }

a { color: #004792; text-decoration: none; }
a:hover { text-decoration: underline; }

/* Header */
.site-header {
  position: fixed; top: 0; left: 0; right: 0; z-index: 100;
  background: rgba(255, 255, 255, 0.85);
  border-bottom: 1px solid transparent;
  transition: background 0.35s ease, border-color 0.35s ease, box-shadow 0.35s ease, backdrop-filter 0.35s ease;
}
.site-header.scrolled {
  background: rgba(255, 255, 255, 0.92);
  border-bottom-color: rgba(0, 71, 146, 0.12);
  box-shadow: 0 2px 20px rgba(0, 71, 146, 0.06);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
}
.header-inner {
  max-width: 1080px; margin: 0 auto; padding: 0 24px;
  display: flex; align-items: center; justify-content: space-between;
  height: 52px; gap: 12px;
}
.site-logo {
  display: flex; align-items: center; gap: 8px;
  color: #004792; white-space: nowrap; flex-shrink: 0;
  min-height: 40px;
}
.site-logo:hover { text-decoration: none; }
.logo-icon {
  width: 28px; height: 28px; display: block; flex-shrink: 0;
  object-fit: contain; object-position: center;
}
.logo-text {
  display: flex; flex-direction: column; justify-content: center;
  line-height: 1.25; gap: 1px;
}
.logo-brand {
  font-size: 0.92rem; font-weight: 700; color: #004792;
  letter-spacing: 0.04em;
}
.site-logo .logo-sub {
  color: #666666; font-weight: 400; font-size: 0.68rem;
  letter-spacing: 0.01em; max-width: 220px;
  overflow: hidden; text-overflow: ellipsis;
}
html.lang-en .site-logo .logo-sub.lang-en { max-width: 280px; }
.header-right { display: flex; align-items: center; gap: 4px; }
.site-nav { display: flex; list-style: none; }
.site-nav a {
  display: block; padding: 18px 11px; font-size: 0.84rem;
  color: #222222; border-bottom: 2px solid transparent;
  position: relative; transition: color 0.25s ease;
}
.site-nav a:hover { color: #004792; text-decoration: none; }
.site-nav a.active { color: #004792; font-weight: 600; border-bottom-color: #004792; }
.nav-indicator {
  position: absolute; bottom: 0; left: 50%; transform: translateX(-50%);
  width: 4px; height: 4px; background: #004792; border-radius: 50%;
  box-shadow: 0 0 8px rgba(0, 71, 146, 0.5);
  animation: navPulse 2s ease-in-out infinite;
}
@keyframes navPulse {
  0%, 100% { opacity: 1; transform: translateX(-50%) scale(1); }
  50% { opacity: 0.6; transform: translateX(-50%) scale(1.3); }
}
.lang-switch { display: flex; border: 1px solid #eeeeee; margin-left: 6px; flex-shrink: 0; }
.lang-switch button {
  background: none; border: none; padding: 6px 11px; font-size: 0.78rem;
  color: #666666; cursor: pointer; font-family: inherit;
  transition: background 0.25s ease, color 0.25s ease;
}
.lang-switch button:hover { color: #004792; }
.lang-switch button.active { background: #004792; color: #ffffff; }
.lang-switch-mobile { display: none; }
.header-toolbar { display: none; align-items: center; gap: 6px; flex-shrink: 0; }
.nav-toggle {
  display: none; background: none; border: 1px solid #eeeeee;
  padding: 6px 10px; font-size: 0.8rem; color: #222222; cursor: pointer; font-family: inherit;
  line-height: 1.2;
}

/* English desktop nav — single row, tighter labels area */
@media (min-width: 901px) {
  html.lang-en .header-inner {
    max-width: 100%;
    padding: 0 18px;
  }
  html.lang-en .site-logo .logo-sub {
    display: none;
  }
  html.lang-en .site-nav {
    flex-wrap: nowrap;
    flex-shrink: 1;
    min-width: 0;
  }
  html.lang-en .site-nav a {
    padding: 18px 6px;
    font-size: 0.74rem;
    font-family: "Segoe UI", "Helvetica Neue", Arial, sans-serif;
    letter-spacing: 0;
    white-space: nowrap;
  }
  html.lang-en .header-right {
    flex: 1;
    justify-content: flex-end;
    min-width: 0;
  }
  html.lang-en .lang-switch-desktop button {
    padding: 6px 8px;
    font-size: 0.72rem;
  }
}

/* English: hamburger menu kicks in slightly earlier to avoid nav wrap */
@media (max-width: 980px) {
  html.lang-en .header-inner { flex-wrap: wrap; height: auto; padding: 10px 16px; align-items: center; }
  html.lang-en .header-toolbar { display: flex; margin-left: auto; }
  html.lang-en .lang-switch-mobile { display: flex; margin-left: 0; border-color: rgba(0, 71, 146, 0.18); background: rgba(0, 71, 146, 0.04); border-radius: 3px; overflow: hidden; }
  html.lang-en .lang-switch-mobile button { padding: 5px 10px; font-size: 0.72rem; font-weight: 500; min-width: 34px; }
  html.lang-en .lang-switch-mobile button.active { background: #004792; color: #fff; }
  html.lang-en .nav-toggle { display: block; margin-left: 0; border-color: rgba(0, 71, 146, 0.18); color: #004792; padding: 5px 12px; border-radius: 3px; font-size: 0.78rem; }
  html.lang-en .header-right {
    display: none;
    width: 100%;
    flex-direction: column;
    align-items: stretch;
    border-top: 1px solid #eeeeee;
    padding-top: 4px;
  }
  html.lang-en .site-header.nav-open .header-right { display: flex; }
  html.lang-en .site-header.nav-open .lang-switch-mobile { display: none; }
  html.lang-en .site-nav { display: flex; flex-direction: column; width: 100%; flex-wrap: nowrap; }
  html.lang-en .site-nav a { padding: 11px 0; border-bottom: 1px solid #eeeeee; white-space: normal; font-size: 0.84rem; }
  html.lang-en .site-nav a.active { border-left: 3px solid #004792; padding-left: 12px; border-bottom-color: #eeeeee; }
  html.lang-en .lang-switch-desktop { margin-left: 0; align-self: flex-end; margin-top: 8px; margin-bottom: 4px; }
  html.lang-en .site-logo .logo-sub { display: none; }
}

/* Main */
main {
  flex: 1; max-width: 1080px; margin: 0 auto;
  padding: 96px 24px 56px; width: 100%;
  position: relative; z-index: 1;
}
.page-home main { max-width: 960px; }

/* Home page in-section navigation */
.home-section-nav {
  position: sticky; top: 52px; z-index: 90;
  background: rgba(255, 255, 255, 0.92);
  border-bottom: 1px solid rgba(0, 71, 146, 0.1);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
}
.home-section-nav-inner {
  max-width: 960px; margin: 0 auto; padding: 0 16px;
  display: flex; gap: 4px; overflow-x: auto;
  scrollbar-width: none; -ms-overflow-style: none;
}
.home-section-nav-inner::-webkit-scrollbar { display: none; }
.home-section-link {
  flex-shrink: 0; padding: 10px 12px;
  font-size: 0.78rem; color: #556; white-space: nowrap;
  border-bottom: 2px solid transparent;
  transition: color 0.2s, border-color 0.2s;
}
.home-section-link:hover { color: #004792; text-decoration: none; }
.home-section-link.active {
  color: #004792; font-weight: 600;
  border-bottom-color: #004792;
}
html.lang-zh .home-section-link { letter-spacing: 0.02em; }

[id] { scroll-margin-top: 108px; }

.section-prose { max-width: 720px; margin-left: auto; margin-right: auto; }
.section-wide { max-width: 100%; }
.site-header { z-index: 100; }
.site-footer { position: relative; z-index: 1; background: rgba(255,255,255,0.9); }

.page-title {
  font-size: 1.5rem; font-weight: 700; color: #004792;
  margin-bottom: 8px; line-height: 1.5;
}
.page-subtitle { font-size: 0.9rem; color: #666666; margin-bottom: 28px; }

/* Document meta bar */
.doc-meta {
  border: 1px solid rgba(0, 71, 146, 0.12); padding: 20px 24px; margin-bottom: 32px;
  background: rgba(250, 251, 253, 0.85); font-size: 0.88rem;
  backdrop-filter: blur(4px); -webkit-backdrop-filter: blur(4px);
  box-shadow: 0 2px 16px rgba(0, 71, 146, 0.04);
}
.doc-meta-grid {
  display: grid; grid-template-columns: 1fr 1fr; gap: 6px 32px;
}
.doc-meta p { margin: 0; line-height: 1.7; }
.doc-meta .label { color: #666666; }
.doc-meta .value { color: #222222; }
.doc-meta-full { grid-column: 1 / -1; margin-top: 8px; padding-top: 8px; border-top: 1px solid #eeeeee; }

.page-home .section { margin-bottom: 48px; }
.section-title {
  font-size: 1.125rem; font-weight: 700; color: #004792;
  margin-bottom: 14px; padding-bottom: 6px; border-bottom: 1px solid #eeeeee;
}
.subsection-title { font-size: 1rem; font-weight: 700; color: #222222; margin: 20px 0 10px; }
.section p, .section li { text-align: justify; margin-bottom: 0.6em; }
.section ul, .section ol { padding-left: 1.5em; }
.section li { margin-bottom: 0.35em; }

/* Hero */
.hero {
  text-align: center; padding: 40px 24px 32px;
  border-bottom: 1px solid rgba(0, 71, 146, 0.1); margin-bottom: 32px;
  background: linear-gradient(180deg, rgba(0, 71, 146, 0.04) 0%, rgba(255,255,255,0) 100%);
  border-radius: 2px;
  position: relative; overflow: hidden;
}
.hero-home {
  padding: 56px 32px 40px; margin-bottom: 40px;
  background: linear-gradient(165deg, rgba(0, 45, 98, 0.07) 0%, rgba(0, 71, 146, 0.03) 45%, rgba(255,255,255,0) 100%);
  border: 1px solid rgba(0, 71, 146, 0.08);
  border-bottom: none;
  border-radius: 4px;
  box-shadow: 0 8px 48px rgba(0, 71, 146, 0.05);
}
.hero-eyebrow {
  font-size: 0.72rem; letter-spacing: 0.12em; text-transform: uppercase;
  color: #666; margin-bottom: 16px; font-weight: 500;
}
html.lang-zh .hero-eyebrow { text-transform: none; letter-spacing: 0.06em; }
.hero-lead {
  font-size: 1.02rem; color: #444; line-height: 1.85;
  max-width: 640px; margin: 0 auto 24px; text-align: center;
}
.hero-formula {
  margin: 0 auto 28px; padding: 20px 28px; max-width: 520px;
  background: rgba(255,255,255,0.75);
  border: 1px solid rgba(0, 71, 146, 0.12);
  border-left: 3px solid #004792;
  font-family: "Cambria Math", "Times New Roman", serif;
  font-size: 1.05rem; line-height: 2;
  backdrop-filter: blur(8px); -webkit-backdrop-filter: blur(8px);
}
.hero-formula .eq { display: block; }
.hero-actions {
  display: flex; flex-wrap: wrap; gap: 12px; justify-content: center;
}
.btn {
  display: inline-block; padding: 11px 24px; font-size: 0.88rem;
  font-weight: 600; letter-spacing: 0.02em; border-radius: 2px;
  transition: background 0.25s ease, color 0.25s ease, box-shadow 0.25s ease, transform 0.2s ease;
  font-family: inherit;
}
.btn:hover { text-decoration: none; transform: translateY(-1px); }
.btn-primary {
  background: #004792; color: #fff;
  box-shadow: 0 4px 16px rgba(0, 71, 146, 0.25);
}
.btn-primary:hover { background: #003366; color: #fff; box-shadow: 0 6px 24px rgba(0, 71, 146, 0.3); }
.btn-secondary {
  background: transparent; color: #004792;
  border: 1px solid rgba(0, 71, 146, 0.35);
}
.btn-secondary:hover { background: rgba(0, 71, 146, 0.06); color: #004792; }

/* Metrics strip */
.metrics-strip {
  display: grid; grid-template-columns: repeat(2, 1fr); gap: 16px;
  margin-bottom: 48px;
}
@media (min-width: 768px) { .metrics-strip { grid-template-columns: repeat(4, 1fr); } }
.metric-card {
  padding: 20px 16px; text-align: center;
  border: 1px solid rgba(0, 71, 146, 0.1);
  background: rgba(255,255,255,0.8);
  backdrop-filter: blur(6px); -webkit-backdrop-filter: blur(6px);
  transition: box-shadow 0.3s ease, border-color 0.3s ease;
}
.metric-card:hover {
  border-color: rgba(0, 71, 146, 0.22);
  box-shadow: 0 6px 28px rgba(0, 71, 146, 0.08);
}
.metric-value {
  display: block; font-size: 1.35rem; font-weight: 700; color: #004792;
  font-family: "Consolas", "Cambria Math", serif; line-height: 1.3;
}
.metric-value small { font-size: 0.75em; font-weight: 600; }
.metric-label {
  display: block; font-size: 0.78rem; color: #444; margin-top: 6px; font-weight: 600;
}
.metric-note {
  display: block; font-size: 0.72rem; color: #888; margin-top: 4px;
}

/* Compare visual */
.compare-visual { margin: 20px 0; }
.compare-row { margin-bottom: 24px; }
.compare-header {
  display: flex; justify-content: space-between; align-items: baseline;
  font-size: 0.82rem; font-weight: 600; color: #444; margin-bottom: 8px;
}
.compare-gr-ref { font-size: 0.72rem; color: #888; font-weight: 400; }
.compare-bar-wrap { display: flex; flex-direction: column; gap: 6px; }
.compare-bar {
  height: 32px; display: flex; align-items: center; padding: 0 12px;
  font-size: 0.78rem; font-weight: 600; white-space: nowrap;
  min-width: 120px; transition: width 0.8s ease;
}
.compare-bar-sgt {
  background: linear-gradient(90deg, #004792, #0066b3);
  color: #fff;
}
.compare-bar-gr {
  background: rgba(0, 71, 146, 0.08);
  color: #666; border: 1px dashed rgba(0, 71, 146, 0.2);
}

/* Cosmo timeline */
.cosmo-timeline {
  display: grid; grid-template-columns: 1fr; gap: 0;
  border-left: 2px solid rgba(0, 71, 146, 0.15);
  margin-left: 12px; padding-left: 0;
}
@media (min-width: 768px) {
  .cosmo-timeline {
    grid-template-columns: repeat(4, 1fr);
    border-left: none; margin-left: 0;
    border-top: 2px solid rgba(0, 71, 146, 0.15);
    padding-top: 0;
  }
}
.cosmo-step {
  position: relative; padding: 20px 16px 20px 24px;
  border-bottom: 1px solid rgba(0, 71, 146, 0.08);
}
@media (min-width: 768px) {
  .cosmo-step {
    padding: 24px 16px 16px; text-align: center;
    border-bottom: none; border-right: 1px solid rgba(0, 71, 146, 0.08);
  }
  .cosmo-step:last-child { border-right: none; }
}
.cosmo-step-num {
  display: inline-block; font-size: 0.68rem; font-weight: 700;
  color: #fff; background: #004792; width: 22px; height: 22px;
  line-height: 22px; text-align: center; border-radius: 50%;
  margin-bottom: 8px;
}
@media (min-width: 768px) {
  .cosmo-step-num { position: absolute; top: -12px; left: 50%; transform: translateX(-50%); }
}
.cosmo-step strong { display: block; font-size: 0.88rem; color: #004792; margin-bottom: 4px; }
.cosmo-step span:last-child { font-size: 0.78rem; color: #666; line-height: 1.5; }

/* Nav cards */
.nav-cards {
  display: grid; grid-template-columns: 1fr; gap: 12px; margin-top: 24px;
}
@media (min-width: 600px) { .nav-cards { grid-template-columns: repeat(2, 1fr); } }
@media (min-width: 900px) { .nav-cards { grid-template-columns: repeat(4, 1fr); } }
.nav-card {
  display: block; padding: 18px 16px;
  border: 1px solid rgba(0, 71, 146, 0.12);
  background: rgba(0, 71, 146, 0.02);
  transition: border-color 0.25s ease, box-shadow 0.25s ease, transform 0.2s ease;
}
.nav-card:hover {
  text-decoration: none; border-color: #004792;
  box-shadow: 0 4px 20px rgba(0, 71, 146, 0.1); transform: translateY(-2px);
}
.nav-card strong { display: block; color: #004792; font-size: 0.92rem; margin-bottom: 4px; }
.nav-card span { font-size: 0.78rem; color: #666; line-height: 1.4; }

.section-link { margin-top: 16px; font-size: 0.88rem; }
.author-line {
  text-align: center; font-size: 0.82rem; color: #888;
  margin: 32px 0 8px; padding-top: 24px;
  border-top: 1px solid #eee;
}

/* Author page */
.page-author main { max-width: 720px; }
.author-header { margin-bottom: 32px; }
.author-identity { margin-top: 12px; }
.author-name {
  font-size: 1.15rem; font-weight: 700; color: #004792;
  margin: 0 0 6px;
}
html.lang-zh .author-name { font-family: "Noto Serif SC", "Source Han Serif SC", serif; }
.author-meta {
  font-size: 0.88rem; color: #666; margin: 0 0 4px; line-height: 1.6;
}
.author-bio p {
  font-size: 0.94rem; line-height: 1.85; color: #444;
}
.author-list {
  margin: 0; padding-left: 1.25em;
  font-size: 0.92rem; line-height: 1.75; color: #555;
}
.author-list li { margin-bottom: 8px; }
.verify-badge.active {
  background: rgba(0, 71, 146, 0.1);
  border-color: rgba(0, 71, 146, 0.35);
  color: #004792;
}

.quote-attr { font-size: 0.82rem !important; color: #888 !important; font-weight: 400 !important; font-style: italic; }

.advantage-num {
  display: block; font-size: 0.68rem; font-weight: 700; letter-spacing: 0.1em;
  color: rgba(0, 71, 146, 0.45); margin-bottom: 8px;
}
.advantage-card {
  transition: box-shadow 0.3s ease, transform 0.25s ease;
}
.advantage-card:hover {
  box-shadow: 0 8px 32px rgba(0, 71, 146, 0.1);
  transform: translateY(-3px);
}

.hero::before {
  content: ''; position: absolute; top: 0; left: 0; right: 0; height: 2px;
  background: linear-gradient(90deg, transparent, #004792, transparent);
  opacity: 0.5;
}
.hero-title {
  font-size: 1.65rem; font-weight: 700; color: #004792; line-height: 1.5; margin-bottom: 8px;
  letter-spacing: 0.02em;
  text-shadow: 0 0 40px rgba(0, 71, 146, 0.08);
}
.hero-home .hero-title {
  font-size: 2.1rem; margin-bottom: 20px; letter-spacing: 0.04em;
}
.hero-title-gloss {
  font-size: 0.72em;
  font-weight: 400;
  opacity: 0.85;
}
.hero-tagline {
  font-size: 1.05rem; font-weight: 500; font-style: italic;
  color: #556; letter-spacing: 0.03em;
  margin: -8px 0 16px; line-height: 1.4;
}
html.lang-en .hero-tagline { font-family: "Source Serif 4", Georgia, serif; }
html.lang-zh .hero-tagline { font-family: "Noto Serif SC", "Source Han Serif SC", serif; font-style: normal; }
@media (max-width: 600px) { .hero-home .hero-title { font-size: 1.55rem; } }
.hero-sub { font-size: 0.92rem; color: #666666; margin-bottom: 4px; }

/* 物理参数 ticker */
.hero-ticker {
  margin-top: 24px; overflow: hidden;
  border-top: 1px solid rgba(0, 71, 146, 0.08);
  padding-top: 16px;
  mask-image: linear-gradient(90deg, transparent, #000 8%, #000 92%, transparent);
  -webkit-mask-image: linear-gradient(90deg, transparent, #000 8%, #000 92%, transparent);
}
.ticker-track {
  display: flex; gap: 32px; width: max-content;
  animation: tickerScroll 40s linear infinite;
}
.ticker-item {
  font-family: "Consolas", "Courier New", monospace;
  font-size: 0.78rem; color: #004792; white-space: nowrap;
  padding: 4px 12px; border: 1px solid rgba(0, 71, 146, 0.15);
  background: rgba(0, 71, 146, 0.04); border-radius: 2px;
}
@keyframes tickerScroll {
  0% { transform: translateX(0); }
  100% { transform: translateX(-50%); }
}

/* Formulas */
.formula-block {
  margin: 16px 0; padding: 16px 20px;
  background: linear-gradient(135deg, rgba(0,71,146,0.03) 0%, rgba(248,249,251,1) 100%);
  border-left: 3px solid #004792;
  font-family: "Cambria Math", "Times New Roman", serif;
  font-size: 1rem; line-height: 2; overflow-x: auto;
  position: relative; overflow: hidden;
  transition: box-shadow 0.3s ease, border-color 0.3s ease;
}
.formula-block:hover {
  box-shadow: 0 4px 24px rgba(0, 71, 146, 0.08);
  border-left-color: #0066cc;
}
.formula-block .eq { display: block; margin: 6px 0; text-align: center; }
.formula-note { font-size: 0.85rem; color: #666666; margin-top: 8px; font-family: inherit; text-align: left; }
.formula-scan {
  position: absolute; top: 0; left: -100%; width: 60%; height: 100%;
  background: linear-gradient(90deg, transparent, rgba(0,71,146,0.06), transparent);
  animation: formulaScan 6s ease-in-out infinite;
  pointer-events: none;
}
@keyframes formulaScan {
  0%, 100% { left: -100%; }
  50% { left: 150%; }
}

/* Tables — academic three-line */
.table-wrap { overflow-x: auto; margin: 16px 0 24px; }
.academic-table {
  width: 100%; border-collapse: collapse; font-size: 0.86rem; line-height: 1.7;
}
.academic-table thead { border-top: 2px solid #222222; border-bottom: 1px solid #222222; }
.academic-table tbody { border-bottom: 2px solid #222222; }
.academic-table th, .academic-table td {
  padding: 9px 12px; text-align: left; vertical-align: top; border: none;
}
.academic-table th { font-weight: 700; background: none; }
.academic-table tbody tr { border-bottom: 1px solid #eeeeee; transition: background 0.2s ease, transform 0.2s ease; }
.academic-table tbody tr:not(.cat-row):hover { background: rgba(0, 71, 146, 0.04); }
.academic-table tbody tr:last-child { border-bottom: none; }
.academic-table .grade-a { color: #004792; font-weight: 600; }
.academic-table .grade-am { color: #336699; font-weight: 600; }
.academic-table .grade-bp { color: #5588aa; font-weight: 600; }
.academic-table .check { color: #004792; }

/* Audit category row */
.academic-table .cat-row td {
  background: #f0f4f8; font-weight: 700; color: #004792;
  border-bottom: 1px solid #dddddd;
}

/* Highlight box */
.info-box {
  padding: 16px 20px; margin: 16px 0;
  border: 1px solid rgba(0, 71, 146, 0.12); background: rgba(250, 251, 253, 0.9);
  border-left: 3px solid #004792;
  transition: box-shadow 0.3s ease;
}
.info-box:hover { box-shadow: 0 4px 20px rgba(0, 71, 146, 0.06); }
.info-box strong { color: #004792; }

/* 滚动显现 */
.reveal {
  opacity: 0; transform: translateY(24px);
  transition: opacity 0.65s ease, transform 0.65s ease;
}
.reveal.revealed { opacity: 1; transform: translateY(0); }

/* Grade badges */
.badge { display: inline-block; font-size: 0.72rem; font-weight: 700; color: #fff; background: #004792; padding: 2px 7px; margin-right: 6px; vertical-align: middle; }
.badge-am { background: #336699; }
.badge-bp { background: #5588aa; }
.badge-b { background: #778899; }
.badge-c { background: #999999; }

/* Liability lists */
.liability-block { margin-top: 28px; padding: 20px 24px; border: 1px solid #eeeeee; background: #fafafa; }
.liability-block h3 { font-size: 1rem; color: #004792; margin-bottom: 10px; }
.liability-block ul { list-style: none; padding: 0; }
.liability-block li { padding-left: 1em; text-indent: -1em; margin-bottom: 0.3em; }
.liability-block li::before { content: "· "; color: #004792; font-weight: 700; }

/* Declaration */
.declaration-box {
  margin-top: 28px; padding: 24px; border: 1px solid #eeeeee; background: #fafafa;
}
.declaration-box h3 { font-size: 1rem; color: #004792; margin-bottom: 12px; }
.declaration-box p { font-size: 0.9rem; text-align: justify; margin-bottom: 0.5em; }

/* Footer */
.site-footer {
  border-top: 1px solid rgba(0, 71, 146, 0.1); padding: 32px 24px 28px;
  text-align: center; font-size: 0.78rem; color: #666666; line-height: 1.8;
  background: linear-gradient(180deg, rgba(250,251,253,0.95) 0%, rgba(255,255,255,1) 100%);
}
.footer-inner { max-width: 720px; margin: 0 auto; }
.footer-tagline {
  font-size: 0.72rem; letter-spacing: 0.08em; text-transform: uppercase;
  color: #888; margin-bottom: 16px;
}
html.lang-zh .footer-tagline { text-transform: none; letter-spacing: 0.04em; }
.verify-badges {
  display: flex; flex-wrap: wrap; gap: 8px; justify-content: center;
  margin-bottom: 16px;
}
.verify-badge {
  display: inline-block; padding: 5px 12px; font-size: 0.68rem;
  font-weight: 600; letter-spacing: 0.06em;
  border: 1px solid rgba(0, 71, 146, 0.2);
  color: #004792; background: rgba(0, 71, 146, 0.04);
  border-radius: 2px; transition: background 0.2s ease, border-color 0.2s ease;
}
.verify-badge:hover {
  text-decoration: none; background: rgba(0, 71, 146, 0.1);
  border-color: #004792;
}
.footer-api-status { margin: 0 0 10px; text-align: center; }
.api-pill {
  display: inline-block; font-size: 0.72rem; padding: 3px 10px;
  border-radius: 999px; border: 1px solid #ddd;
}
.api-pill-pending { color: #888; border-color: #ddd; }
.api-pill-ok { color: #1a6b4a; border-color: #8fd4b0; background: #f0faf4; }
.api-pill-off { color: #8a5a20; border-color: #e8c890; background: #fffaf0; }

.solver-verify-box {
  margin: 0 0 24px; padding: 14px 18px;
  background: #f5f8fc; border: 1px solid #dde6f0; border-radius: 6px;
  font-size: 0.88rem; line-height: 1.65;
}
.solver-verify-box a { font-weight: 600; margin-right: 12px; }

.footer-copy { margin: 0; color: #888; font-size: 0.75rem; }

/* 论文扩展样式 */
.keywords { display: flex; flex-wrap: wrap; gap: 8px; margin: 12px 0 20px; }
.keywords span {
  font-size: 0.78rem; padding: 4px 10px;
  border: 1px solid rgba(0,71,146,0.2); color: #004792;
  background: rgba(0,71,146,0.04); border-radius: 2px;
}
.analogy-box {
  margin: 20px 0; padding: 20px 24px;
  border-left: 3px solid #004792;
  background: linear-gradient(90deg, rgba(0,71,146,0.05) 0%, transparent 100%);
}
.analogy-box p { margin-bottom: 0.6em; }
.quote-box {
  margin: 28px 0; padding: 24px 28px;
  border: 1px solid rgba(0,71,146,0.15); background: rgba(0,71,146,0.03);
}
.quote-box p { font-size: 1.02rem; color: #004792; font-weight: 500; line-height: 1.9; margin-bottom: 0.6em; text-align: center; }
.quote-box p:last-child { margin-bottom: 0; }
.timeline-list { list-style: none; padding: 0; }
.timeline-list li {
  position: relative; padding: 10px 0 10px 22px;
  border-left: 2px solid rgba(0,71,146,0.2); margin-left: 8px;
}
.timeline-list li::before {
  content: ''; position: absolute; left: -5px; top: 16px;
  width: 8px; height: 8px; background: #004792; border-radius: 50%;
}
.advantage-grid { display: grid; grid-template-columns: 1fr; gap: 20px; margin: 20px 0; }
@media (min-width: 768px) { .advantage-grid { grid-template-columns: repeat(3, 1fr); } }
.advantage-card {
  padding: 20px 18px; border: 1px solid rgba(0,71,146,0.12);
  border-top: 3px solid #004792; background: rgba(0,71,146,0.02);
}
.advantage-card h3 { font-size: 0.95rem; color: #004792; margin-bottom: 10px; font-weight: 700; }
.advantage-card p { font-size: 0.88rem; margin-bottom: 0.5em; text-align: justify; }
.advantage-card p:last-child { margin-bottom: 0; }
.advantage-tagline { font-size: 0.82rem; color: #666; font-style: italic; margin-bottom: 8px; }

/* 纯洁性 / 定理卡片 */
.purity-banner {
  padding: 24px 28px; margin-bottom: 8px;
  border: 1px solid rgba(0, 71, 146, 0.2);
  border-left: 4px solid #004792;
  background: linear-gradient(135deg, rgba(0,71,146,0.06) 0%, rgba(255,255,255,0.9) 100%);
}
.purity-banner h2 { font-size: 1.05rem; color: #004792; margin-bottom: 12px; font-weight: 700; }
.purity-banner p { margin-bottom: 0.55em; text-align: justify; font-size: 0.92rem; }
.theorem-card {
  margin: 16px 0; padding: 18px 22px;
  border: 1px solid rgba(0,71,146,0.12);
  background: rgba(250,251,253,0.95);
}
.theorem-card h3 { font-size: 0.95rem; color: #004792; margin-bottom: 8px; }
.theorem-stmt {
  font-family: "Cambria Math", "Times New Roman", serif;
  font-size: 1rem; color: #222; margin-bottom: 8px; font-weight: 600;
}
.tier-near { color: #004792; font-weight: 600; }
.tier-mid { color: #336699; font-weight: 600; }
.tier-future { color: #888; font-weight: 600; }
.param-evolution {
  display: grid; grid-template-columns: repeat(4, 1fr); gap: 8px;
  margin: 16px 0; font-size: 0.78rem; text-align: center;
}
@media (max-width: 768px) { .param-evolution { display: none; } }
.param-evolution .param-phase {
  padding: 12px 8px; border: 1px solid rgba(0,71,146,0.12);
  background: rgba(0,71,146,0.03);
}
.param-evolution .param-phase strong { display: block; color: #004792; margin-bottom: 6px; font-size: 0.72rem; }
.catalog-index {
  padding: 20px; margin-bottom: 28px;
  border: 1px solid rgba(0,71,146,0.15);
  background: rgba(0,71,146,0.03);
}
.catalog-index h3 { color: #004792; margin-bottom: 10px; font-size: 1rem; }
.catalog-index ul { padding-left: 1.2em; margin: 0; }
.catalog-index li { margin-bottom: 0.35em; font-size: 0.88rem; }

/* 减少动效偏好 */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .reveal { opacity: 1; transform: none; transition: none; }
  .ticker-track { animation: none; flex-wrap: wrap; justify-content: center; width: 100%; }
  .formula-scan, .nav-indicator { animation: none; }
  .site-header { transition: none; }
}

/* Responsive */
@media (max-width: 900px) {
  .header-inner { flex-wrap: wrap; height: auto; padding: 10px 16px; align-items: center; }
  .header-toolbar {
    display: flex;
    margin-left: auto;
  }
  .lang-switch-mobile {
    display: flex;
    margin-left: 0;
    border-color: rgba(0, 71, 146, 0.18);
    background: rgba(0, 71, 146, 0.04);
    border-radius: 3px;
    overflow: hidden;
  }
  .lang-switch-mobile button {
    padding: 5px 10px;
    font-size: 0.72rem;
    font-weight: 500;
    min-width: 34px;
    letter-spacing: 0.02em;
  }
  .lang-switch-mobile button.active {
    background: #004792;
    color: #fff;
  }
  .nav-toggle {
    display: block;
    margin-left: 0;
    border-color: rgba(0, 71, 146, 0.18);
    color: #004792;
    padding: 5px 12px;
    border-radius: 3px;
    font-size: 0.78rem;
  }
  .header-right {
    display: none;
    width: 100%;
    flex-direction: column;
    align-items: stretch;
    border-top: 1px solid #eeeeee;
    padding-top: 4px;
  }
  .site-header.nav-open .header-right { display: flex; }
  .site-header.nav-open .lang-switch-mobile { display: none; }
  .site-nav { display: flex; flex-direction: column; width: 100%; }
  .site-nav a { padding: 11px 0; border-bottom: 1px solid #eeeeee; }
  .site-nav a.active { border-left: 3px solid #004792; padding-left: 12px; border-bottom-color: #eeeeee; }
  .lang-switch-desktop { margin-left: 0; align-self: flex-end; margin-top: 8px; margin-bottom: 4px; }
  .logo-icon { width: 24px; height: 24px; }
  .logo-brand { font-size: 0.85rem; }
  .site-logo .logo-sub { display: none; }
  main { padding: 80px 16px 40px; }
  .doc-meta-grid { grid-template-columns: 1fr; }
  .hero-title { font-size: 1.3rem; }
  .hero-home { padding: 40px 16px 32px; }
  .hero-home .hero-title { font-size: 1.4rem; }
  .hero-formula { font-size: 0.92rem; padding: 16px; }
  .metrics-strip { grid-template-columns: 1fr 1fr; gap: 10px; }
  .metric-value { font-size: 1.1rem; }
  .compare-bar { font-size: 0.7rem; height: 28px; }
  .page-title { font-size: 1.25rem; }
  .academic-table { font-size: 0.8rem; }
  .ticker-track { animation-duration: 60s; }
  .hero-ticker { mask-image: none; -webkit-mask-image: none; }
}

/* ========== Roadmap & Vision (outlook.html) ========== */
.page-roadmap main { max-width: 820px; }

.roadmap-header { margin-bottom: 40px; }
.roadmap-lead {
  font-size: 0.92rem; line-height: 1.75; color: #555;
  margin-top: 16px; max-width: 640px;
  padding-left: 14px; border-left: 2px solid rgba(0, 71, 146, 0.25);
}

.roadmap-section { margin-bottom: 56px; }

.roadmap-timeline {
  position: relative; margin-top: 28px; padding-left: 0;
}
.roadmap-timeline::before {
  content: ''; position: absolute; left: 27px; top: 8px; bottom: 8px;
  width: 2px;
  background: linear-gradient(180deg, #004792 0%, rgba(0, 71, 146, 0.15) 100%);
}
@media (min-width: 640px) {
  .roadmap-timeline::before { left: 31px; }
}

.roadmap-step {
  position: relative; display: grid;
  grid-template-columns: 56px 1fr; gap: 0 20px;
  padding-bottom: 36px;
}
@media (min-width: 640px) {
  .roadmap-step { grid-template-columns: 64px 1fr; gap: 0 28px; }
}
.roadmap-step:last-child { padding-bottom: 0; }

.roadmap-step-marker { position: relative; z-index: 1; }
.roadmap-year {
  display: flex; align-items: center; justify-content: center;
  width: 56px; height: 56px; margin: 0 auto;
  font-size: 0.72rem; font-weight: 700; letter-spacing: 0.02em;
  color: #fff; background: #004792;
  border: 2px solid #fff;
  box-shadow: 0 0 0 1px rgba(0, 71, 146, 0.2);
  border-radius: 50%;
}
@media (min-width: 640px) {
  .roadmap-year { width: 64px; height: 64px; font-size: 0.78rem; }
}

.roadmap-step-body {
  padding: 4px 0 0;
  border-bottom: 1px solid rgba(0, 71, 146, 0.08);
  padding-bottom: 28px;
}
.roadmap-step:last-child .roadmap-step-body { border-bottom: none; padding-bottom: 0; }

.roadmap-step-title {
  font-size: 1.05rem; font-weight: 700; color: #004792;
  margin: 0 0 10px; line-height: 1.35;
}
html.lang-zh .roadmap-step-title { font-family: "Noto Serif SC", "Source Han Serif SC", serif; }
.roadmap-step-sub,
.roadmap-step-title .vision-title-en {
  display: block; font-size: 0.78rem; font-weight: 500;
  color: #668; letter-spacing: 0.04em; margin-top: 4px;
}
html.lang-en .roadmap-step-sub { display: none; }

.roadmap-step-desc {
  font-size: 0.88rem; color: #444; margin: 0 0 10px;
}
.roadmap-step-list {
  margin: 0 0 14px; padding-left: 1.2em;
  font-size: 0.86rem; line-height: 1.65; color: #555;
}
.roadmap-step-list li { margin-bottom: 4px; }
.roadmap-step-goal,
.roadmap-step-principle {
  font-size: 0.84rem; line-height: 1.65; color: #666;
  margin: 0; padding: 12px 14px;
  background: rgba(0, 71, 146, 0.04);
  border-left: 2px solid rgba(0, 71, 146, 0.35);
}
.roadmap-step-goal strong,
.roadmap-step-principle strong { color: #004792; font-weight: 600; }

/* Research domains (Paper § VII) */
.roadmap-domains { margin-top: 8px; padding-top: 48px; border-top: 1px solid rgba(0, 71, 146, 0.12); }
.roadmap-domains-lead {
  font-size: 0.88rem; line-height: 1.7; color: #666;
  margin: -8px 0 28px; max-width: 640px;
}
.roadmap-domains-grid {
  display: grid; gap: 20px;
}
@media (min-width: 640px) {
  .roadmap-domains-grid { grid-template-columns: 1fr 1fr; gap: 24px; }
}
.roadmap-domain {
  padding: 20px 22px;
  background: rgba(0, 71, 146, 0.03);
  border: 1px solid rgba(0, 71, 146, 0.1);
  border-radius: 4px;
}
.roadmap-domain-title {
  font-size: 0.95rem; font-weight: 700; color: #004792;
  margin: 0 0 12px; line-height: 1.35;
}
html.lang-zh .roadmap-domain-title { font-family: "Noto Serif SC", "Source Han Serif SC", serif; }
.roadmap-domain-num {
  display: inline-block; font-size: 0.75rem; font-weight: 600;
  color: #668; letter-spacing: 0.04em; margin-right: 6px;
}
.roadmap-domain-list {
  margin: 0; padding-left: 1.15em;
  font-size: 0.84rem; line-height: 1.65; color: #555;
}
.roadmap-domain-list li { margin-bottom: 6px; }
.roadmap-domain-list li:last-child { margin-bottom: 0; }
.roadmap-domain-note {
  font-size: 0.82rem; line-height: 1.65; color: #666;
  margin: 10px 0 0; padding-top: 10px;
  border-top: 1px dashed rgba(0, 71, 146, 0.15);
}

/* Vision panel — full-bleed dark block */
.vision-panel {
  position: relative; z-index: 1;
  margin: 0;
  padding: 64px 24px 72px;
  background: linear-gradient(165deg, #071018 0%, #0c1a2e 45%, #0a1628 100%);
  color: rgba(255, 255, 255, 0.88);
  overflow: hidden;
}
.vision-panel::before {
  content: ''; position: absolute; inset: 0; pointer-events: none;
  background:
    radial-gradient(ellipse 80% 50% at 20% 0%, rgba(0, 71, 146, 0.25) 0%, transparent 55%),
    radial-gradient(ellipse 60% 40% at 90% 100%, rgba(0, 100, 180, 0.12) 0%, transparent 50%);
}
.vision-panel::after {
  content: ''; position: absolute; inset: 0; pointer-events: none; opacity: 0.35;
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.03) 1px, transparent 1px);
  background-size: 48px 48px;
}
.vision-panel-inner {
  position: relative; z-index: 1;
  max-width: 720px; margin: 0 auto;
}
.vision-label {
  font-size: 0.68rem; font-weight: 700; letter-spacing: 0.22em;
  text-transform: uppercase; color: rgba(120, 180, 230, 0.75);
  margin: 0 0 12px;
}
.vision-title {
  font-size: 1.35rem; font-weight: 700; color: #fff;
  margin: 0 0 12px; line-height: 1.35;
  letter-spacing: 0.02em;
}
.vision-subtitle {
  font-size: 0.92rem; font-weight: 400; font-style: italic;
  color: rgba(180, 210, 240, 0.75);
  margin: 0 0 28px; line-height: 1.5;
  letter-spacing: 0.02em;
}
html.lang-en .vision-subtitle { font-family: "Source Serif 4", Georgia, serif; }
html.lang-zh .vision-title .vision-title-en {
  display: block; font-size: 0.82rem; font-weight: 500;
  color: rgba(255, 255, 255, 0.45); letter-spacing: 0.06em; margin-top: 6px;
}
html.lang-en .vision-title .vision-title-en { display: none; }

.vision-panel p {
  font-size: 0.92rem; line-height: 1.8; color: rgba(255, 255, 255, 0.78);
  margin: 0 0 1em;
}
.vision-lead { font-size: 1rem !important; color: rgba(255, 255, 255, 0.92) !important; }
.vision-list-heading {
  font-size: 0.82rem !important; font-weight: 600;
  color: rgba(120, 180, 230, 0.9) !important;
  margin-top: 24px !important; letter-spacing: 0.04em;
}
.vision-list {
  margin: 0 0 20px; padding-left: 1.2em;
  font-size: 0.88rem; line-height: 1.75;
  color: rgba(255, 255, 255, 0.72);
}
.vision-list li { margin-bottom: 6px; }
.vision-note {
  font-size: 0.82rem !important; font-style: italic;
  color: rgba(255, 255, 255, 0.5) !important;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  padding-top: 20px; margin-top: 24px !important;
}
.vision-questions { margin-top: 32px; }
.vision-question {
  font-size: 1rem !important; color: rgba(255, 255, 255, 0.95) !important;
  font-weight: 500; margin: 8px 0 16px !important;
  padding-left: 16px; border-left: 2px solid rgba(100, 160, 220, 0.5);
}

/* Epigraph */
.roadmap-epigraph {
  margin: 0; padding: 56px 24px 64px;
  background: #f4f6f8;
  border: none; border-top: 1px solid rgba(0, 71, 146, 0.1);
}
.roadmap-epigraph-inner {
  max-width: 560px; margin: 0 auto; text-align: center;
}
.roadmap-epigraph p {
  font-size: 1.05rem; line-height: 1.85; color: #004792;
  margin: 0 0 12px; font-weight: 500;
}
html.lang-en .roadmap-epigraph p { font-family: "Source Serif 4", Georgia, serif; }
html.lang-zh .roadmap-epigraph p { font-family: "Noto Serif SC", "Source Han Serif SC", serif; }
.roadmap-epigraph p:last-child { margin-bottom: 0; }

.page-roadmap .site-footer { position: relative; z-index: 1; }

/* ========== ZKAV page ========== */
.page-zkav main { max-width: 720px; }
.zkav-header { margin-bottom: 36px; }
.zkav-header-actions { margin-top: 20px; justify-content: flex-start; }
.zkav-paper-doi {
  font-size: 0.85rem; color: #666; margin-top: 8px; margin-bottom: 4px;
}
.zkav-paper-doi a { font-weight: 600; }
.zkav-solver-section { margin-top: 8px; }
.zkav-badge {
  display: inline-block; font-size: 0.72rem; font-weight: 600;
  letter-spacing: 0.08em; text-transform: uppercase;
  color: #004792; background: rgba(0, 71, 146, 0.08);
  padding: 4px 10px; margin-bottom: 12px;
}
html.lang-zh .zkav-badge { text-transform: none; letter-spacing: 0.06em; }
.zkav-flow {
  display: flex; flex-wrap: wrap; gap: 8px; list-style: none;
  margin: 16px 0 0; padding: 0;
  counter-reset: zkav-step;
}
.zkav-flow li {
  flex: 1 1 calc(33.333% - 8px); min-width: 140px;
  padding: 12px 10px; text-align: center;
  font-size: 0.82rem; font-weight: 600; color: #004792;
  background: rgba(0, 71, 146, 0.05);
  border: 1px solid rgba(0, 71, 146, 0.12);
  border-radius: 2px;
}
@media (max-width: 520px) { .zkav-flow li { flex: 1 1 calc(50% - 8px); } }
.zkav-features {
  margin: 0; padding-left: 1.25em;
  font-size: 0.92rem; line-height: 1.75; color: #555;
}
.zkav-features li { margin-bottom: 8px; }
.zkav-sendto {
  font-size: 0.92rem; font-weight: 600; color: #004792;
  margin-bottom: 16px; line-height: 1.75;
}
.zkav-sendto a { font-weight: 700; }
.email-template {
  padding: 20px 22px;
  background: rgba(0, 71, 146, 0.03);
  border: 1px solid rgba(0, 71, 146, 0.12);
  border-radius: 4px;
}
.email-template-label {
  font-size: 0.75rem; font-weight: 600; color: #888;
  text-transform: uppercase; letter-spacing: 0.06em;
  margin: 0 0 6px;
}
html.lang-zh .email-template-label { text-transform: none; }
.email-template-subject {
  font-size: 0.9rem; font-weight: 600; color: #004792;
  margin: 0 0 20px; padding: 10px 12px;
  background: #fff; border: 1px dashed rgba(0, 71, 146, 0.2);
}
.email-template-body {
  font-family: "Consolas", "Courier New", monospace;
  font-size: 0.78rem; line-height: 1.65; color: #444;
  white-space: pre-wrap; word-break: break-word;
  margin: 0 0 20px; padding: 16px;
  background: #fff; border: 1px solid rgba(0, 71, 146, 0.1);
  overflow-x: auto;
}
.zkav-mail-btn { margin-top: 4px; }
.zkav-summary {
  padding: 16px 18px;
  background: rgba(0, 71, 146, 0.05);
  border-left: 3px solid #004792;
  margin-bottom: 20px;
}
.zkav-summary p { margin: 0; font-size: 0.92rem; line-height: 1.75; color: #444; }

/* ZKAV homepage spotlight */
.zkav-spotlight {
  margin: 0 0 48px; padding: 36px 28px;
  background: linear-gradient(135deg, rgba(0, 71, 146, 0.07) 0%, rgba(0, 71, 146, 0.02) 100%);
  border: 1px solid rgba(0, 71, 146, 0.18);
  border-radius: 4px;
  position: relative; overflow: hidden;
}
.zkav-spotlight::before {
  content: ''; position: absolute; top: 0; left: 0; right: 0; height: 3px;
  background: linear-gradient(90deg, #004792, rgba(0, 71, 146, 0.2));
}
.zkav-spotlight-inner { max-width: 680px; margin: 0 auto; }
.zkav-spotlight-eyebrow {
  font-size: 0.72rem; font-weight: 600; letter-spacing: 0.1em;
  text-transform: uppercase; color: #668; margin-bottom: 10px;
}
html.lang-zh .zkav-spotlight-eyebrow { text-transform: none; letter-spacing: 0.06em; }
.zkav-spotlight-title {
  font-size: 1.35rem; font-weight: 700; color: #004792;
  margin: 0 0 14px; line-height: 1.35;
}
html.lang-zh .zkav-spotlight-title { font-family: "Noto Serif SC", "Source Han Serif SC", serif; }
.zkav-acronym {
  display: inline-block; font-size: 0.85em;
  padding: 2px 8px; margin-left: 4px;
  background: rgba(0, 71, 146, 0.1); border-radius: 2px;
}
.zkav-spotlight-lead {
  font-size: 0.92rem; line-height: 1.8; color: #444; margin-bottom: 16px;
}
.zkav-spotlight-points {
  margin: 0 0 16px; padding-left: 1.2em;
  font-size: 0.86rem; line-height: 1.65; color: #555;
}
.zkav-spotlight-points li { margin-bottom: 4px; }
.zkav-spotlight-flow {
  font-size: 0.78rem; font-weight: 600; color: #004792;
  letter-spacing: 0.02em; line-height: 1.6;
  padding: 12px 14px; margin-bottom: 20px;
  background: rgba(255, 255, 255, 0.7);
  border-left: 3px solid #004792;
}
.zkav-spotlight-actions {
  display: flex; flex-wrap: wrap; gap: 12px;
}
.zkav-spotlight-actions .btn-primary { color: #fff; }

/* ZKAV initiative (detail page footer) */
.zkav-initiative {
  width: 100vw;
  margin: 48px 0 0 calc(50% - 50vw);
  padding: 48px 24px 56px;
  background: linear-gradient(165deg, #071018 0%, #0c1a2e 50%, #0a1628 100%);
  color: rgba(255, 255, 255, 0.88);
}
@media (min-width: 768px) {
  .zkav-initiative { padding-left: max(24px, calc(50vw - 360px)); padding-right: max(24px, calc(50vw - 360px)); }
}
.zkav-initiative-inner { max-width: 680px; margin: 0 auto; }
.zkav-initiative-label {
  font-size: 0.72rem; font-weight: 600; letter-spacing: 0.12em;
  text-transform: uppercase; color: rgba(120, 180, 230, 0.8);
  margin-bottom: 12px;
}
html.lang-zh .zkav-initiative-label { text-transform: none; letter-spacing: 0.06em; }
.zkav-initiative-title {
  font-size: 1.2rem; font-weight: 700; color: #fff;
  margin: 0 0 20px; line-height: 1.4;
}
html.lang-zh .zkav-initiative-title { font-family: "Noto Serif SC", "Source Han Serif SC", serif; }
.zkav-initiative-inner p {
  font-size: 0.9rem; line-height: 1.85; color: rgba(255, 255, 255, 0.78);
  margin-bottom: 1em;
}
.zkav-initiative-inner p:last-child { margin-bottom: 0; }
.zkav-initiative-inner strong { color: rgba(180, 220, 255, 0.95); font-weight: 600; }
.zkav-initiative-note {
  margin-top: 24px !important; padding-top: 20px;
  border-top: 1px solid rgba(255, 255, 255, 0.12);
  font-size: 0.84rem !important; font-style: italic;
  color: rgba(255, 255, 255, 0.55) !important;
}
.page-zkav main { padding-bottom: 0; }