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

/* ============================================================
   CSS 自定义属性
   ============================================================ */
:root {
  --green: #87ff71;
  --yellow: #ffce5c;
  --dark: #192617;
  --dark80: rgba(25,38,23,0.8);
  --white: #f5f5f0;
  --off: #e8e8e0;
  --mid: #3d5c38;
  --border: 3px solid var(--dark);
  --border-thick: 5px solid var(--dark);
  --radius: 10px;
  --font-display: 'Playfair Display SC', Georgia, serif;
  --font-body: 'Karla', system-ui, sans-serif;
  --max-w: 1160px;
  --gap: 2rem;
  --transition: 0.2s ease;
}

/* ============================================================
   Reset & Base
   ============================================================ */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

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

body {
  font-family: var(--font-body);
  background: var(--white);
  color: var(--dark);
  line-height: 1.6;
  overflow-x: hidden;
}

a { color: var(--dark); text-decoration: underline; text-underline-offset: 3px; }
a:hover { color: var(--mid); }
a:focus-visible { outline: 3px solid var(--green); outline-offset: 2px; }

img { display: block; max-width: 100%; height: auto; }

h1, h2, h3, h4 {
  font-family: var(--font-display);
  line-height: 1.15;
  letter-spacing: 0.01em;
}

p { line-height: 1.7; }

ol, ul { list-style: none; }

/* ============================================================
   Announce Bar
   ============================================================ */
.announce-bar {
  background: var(--dark);
  color: var(--green);
  font-family: var(--font-display);
  font-size: 0.78rem;
  letter-spacing: 0.12em;
  text-align: center;
  padding: 0.45rem 1rem;
  border-bottom: 2px solid var(--green);
  position: relative;
  z-index: 100;
}

/* ============================================================
   Navigation — nav > ol > li > a
   ============================================================ */
.site-nav {
  position: sticky;
  top: 0;
  z-index: 90;
  background: var(--green);
  border-bottom: var(--border-thick);
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  padding: 0 1.25rem;
  min-height: 60px;
}

/* Memphis zigzag decoration on nav */
.site-nav::before {
  content: '';
  position: absolute;
  bottom: -10px;
  left: 0;
  right: 0;
  height: 10px;
  background: repeating-linear-gradient(
    90deg,
    var(--yellow) 0px, var(--yellow) 10px,
    var(--dark) 10px, var(--dark) 12px
  );
  z-index: 1;
}

.site-nav ol {
  display: flex;
  flex-wrap: wrap;
  gap: 0.25rem;
}

.nav-left { justify-content: flex-start; }
.nav-right { justify-content: flex-end; }

.site-nav ol li a {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  padding: 0.25rem 0.75rem;
  font-family: var(--font-body);
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--dark);
  text-decoration: none;
  border: 2px solid transparent;
  border-radius: 4px;
  transition: background var(--transition), border-color var(--transition);
  white-space: nowrap;
}

.site-nav ol li a:hover {
  background: var(--dark);
  color: var(--green);
  border-color: var(--dark);
}

.nav-brand {
  text-align: center;
  padding: 0 1rem;
}

.brand-link {
  font-family: var(--font-display);
  font-size: 1.35rem;
  font-weight: 700;
  color: var(--dark);
  text-decoration: none;
  letter-spacing: 0.05em;
  padding: 0.5rem 0.75rem;
  display: inline-block;
  border: var(--border);
  background: var(--yellow);
  transform: rotate(-1deg);
  transition: transform var(--transition);
}

.brand-link:hover { transform: rotate(1deg) scale(1.04); color: var(--dark); }

/* ============================================================
   Layout Helpers
   ============================================================ */
.content-wrap {
  display: grid;
  grid-template-columns: 1fr 280px;
  gap: var(--gap);
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 2rem 1.25rem;
  align-items: start;
}

/* ============================================================
   Sidebar — aside 在内容右侧
   ============================================================ */
.sidebar {
  position: sticky;
  top: 80px;
  background: var(--dark);
  color: var(--white);
  border-radius: var(--radius);
  border: var(--border);
  padding: 1.5rem;
}

.sidebar h2 {
  font-size: 1rem;
  color: var(--green);
  margin-bottom: 0.35rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.sidebar .subtitle {
  font-size: 0.8rem;
  color: var(--yellow);
  margin-bottom: 1rem;
}

.sidebar-links {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
  margin-bottom: 1rem;
}

.sidebar-links li { counter-increment: sb-counter; }

.sidebar-links {
  counter-reset: sb-counter;
}

.sidebar-links li a {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  min-height: 40px;
  padding: 0.35rem 0.5rem;
  color: var(--white);
  font-size: 0.88rem;
  font-weight: 500;
  text-decoration: none;
  border-bottom: 1px solid rgba(135,255,113,0.2);
  transition: color var(--transition), padding-left var(--transition);
}

.sidebar-links li a::before {
  content: counter(sb-counter, decimal-leading-zero);
  font-size: 0.7rem;
  color: var(--green);
  font-family: var(--font-display);
  flex-shrink: 0;
}

.sidebar-links li a:hover { color: var(--green); padding-left: 0.85rem; }

.sidebar-parent { margin-top: 0.75rem; }
.sidebar-parent a { color: var(--yellow); font-size: 0.82rem; text-decoration: none; }
.sidebar-parent a:hover { color: var(--green); }

/* ============================================================
   Subtitle (h2 + p.subtitle 契约)
   ============================================================ */
.subtitle {
  font-family: var(--font-body);
  font-size: 1rem;
  font-weight: 400;
  color: var(--mid);
  margin-bottom: 1.25rem;
  line-height: 1.5;
}

/* ============================================================
   Card List — ul > li > article > h3/p
   ============================================================ */
.card-list {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 1.25rem;
  margin-top: 1rem;
}

.card-list li > article.card {
  background: var(--white);
  border: var(--border);
  border-radius: var(--radius);
  border-bottom: 5px solid var(--green);
  padding: 1.25rem;
  transition: transform var(--transition), box-shadow var(--transition);
}

.card-list li > article.card:hover {
  transform: translateY(-4px) rotate(0.5deg);
  box-shadow: 6px 6px 0 var(--dark);
}

.card-list li > article.card h3 {
  font-size: 1rem;
  margin-bottom: 0.5rem;
}

.card-list li > article.card h3 a {
  text-decoration: none;
  color: var(--dark);
}

.card-list li > article.card h3 a:hover { color: var(--mid); }

.card-list li > article.card p {
  font-size: 0.88rem;
  color: #444;
  margin-bottom: 0.5rem;
  line-height: 1.55;
}

.card-list li > article.card time {
  font-size: 0.78rem;
  color: var(--mid);
  font-weight: 600;
}

/* ============================================================
   PAGE: HOME
   ============================================================ */

/* Hero */
.hero-section {
  position: relative;
  min-height: 100vh;
  background: var(--dark);
  overflow: hidden;
  display: flex;
  align-items: flex-end;
  padding: 4rem 2rem 6rem;
}

.hero-content {
  position: relative;
  z-index: 3;
  max-width: var(--max-w);
  margin: 0 auto;
  width: 100%;
  text-align: right;
}

.hero-eyebrow {
  font-family: var(--font-body);
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.18em;
  color: var(--yellow);
  text-transform: uppercase;
  margin-bottom: 1rem;
}

.hero-h1 {
  font-family: var(--font-display);
  font-size: clamp(2.8rem, 8vw, 7rem);
  color: var(--green);
  line-height: 1.05;
  margin-bottom: 1.25rem;
  text-shadow: 4px 4px 0 var(--dark);
}

.hero-sub {
  font-size: 1.1rem;
  color: var(--off);
  max-width: 480px;
  margin-left: auto;
  margin-right: 0;
  margin-bottom: 2rem;
}

.hero-cta {
  display: inline-block;
  background: var(--yellow);
  color: var(--dark);
  font-weight: 700;
  font-family: var(--font-display);
  font-size: 1rem;
  padding: 0.85rem 2rem;
  border: var(--border);
  border-radius: 4px;
  text-decoration: none;
  letter-spacing: 0.06em;
  transition: background var(--transition), transform var(--transition);
}

.hero-cta:hover { background: var(--green); transform: translate(-3px, -3px); color: var(--dark); }

/* Hero slash */
.hero-slash {
  position: absolute;
  bottom: -2px;
  left: -5%;
  right: -5%;
  height: 140px;
  background: var(--white);
  clip-path: polygon(0 100%, 100% 30%, 100% 100%);
  z-index: 2;
}

/* Hero decorations */
.hero-deco { position: absolute; inset: 0; z-index: 1; pointer-events: none; }

.deco-tri {
  position: absolute;
  width: 0;
  height: 0;
}

.deco-tri--1 {
  top: 12%;
  left: 8%;
  border-left: 80px solid transparent;
  border-right: 80px solid transparent;
  border-bottom: 140px solid var(--yellow);
  opacity: 0.7;
  transform: rotate(15deg);
}

.deco-tri--2 {
  bottom: 25%;
  left: 20%;
  border-left: 50px solid transparent;
  border-right: 50px solid transparent;
  border-bottom: 90px solid var(--green);
  opacity: 0.4;
  transform: rotate(-20deg);
}

.deco-zigzag {
  position: absolute;
  top: 30%;
  right: 5%;
  width: 120px;
  height: 40px;
  background: repeating-linear-gradient(
    -45deg,
    var(--yellow) 0px, var(--yellow) 6px,
    transparent 6px, transparent 12px
  );
  opacity: 0.5;
}

/* home content */
.home-content-section {
  background: var(--white);
  padding-top: 1rem;
}

.home-content-section .content-wrap { padding-top: 2.5rem; }

.child-list-section {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 2rem 1.25rem 3rem;
}

.child-list-section h2 {
  font-size: 1.6rem;
  margin-bottom: 0.25rem;
}

/* ============================================================
   PAGE: CHANNEL
   ============================================================ */
.channel-hero {
  position: relative;
  background: var(--dark);
  padding: 5rem 2rem 4rem;
  overflow: hidden;
  border-bottom: var(--border-thick);
}

.ch-deco { position: absolute; inset: 0; pointer-events: none; }

.deco-tri--ch1 {
  position: absolute;
  top: -20px;
  right: 6%;
  width: 0;
  height: 0;
  border-left: 60px solid transparent;
  border-right: 60px solid transparent;
  border-bottom: 110px solid var(--green);
  opacity: 0.5;
  transform: rotate(10deg);
}

.deco-dot-grid {
  position: absolute;
  bottom: 10%;
  left: 4%;
  width: 80px;
  height: 80px;
  background-image: radial-gradient(circle, var(--yellow) 2px, transparent 2px);
  background-size: 12px 12px;
  opacity: 0.5;
}

.channel-h1 {
  font-size: clamp(2rem, 5vw, 4rem);
  color: var(--green);
  text-align: right;
  position: relative;
  z-index: 2;
  max-width: var(--max-w);
  margin: 0 auto 0.75rem;
}

.channel-sub {
  text-align: right;
  color: var(--yellow);
  max-width: var(--max-w);
  margin: 0 auto;
  position: relative;
  z-index: 2;
}

.channel-body { background: var(--white); }

.channel-children {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 1.25rem 3rem;
}

.channel-children h2 { font-size: 1.5rem; margin-bottom: 0.25rem; }

/* ============================================================
   PAGE: ARTICLE
   ============================================================ */
.article-header-section {
  background: var(--dark);
  padding: 3.5rem 2rem 3rem;
  border-bottom: var(--border-thick);
  position: relative;
  overflow: hidden;
}

.article-header-section::before {
  content: '';
  position: absolute;
  top: 0; right: 0;
  width: 180px; height: 180px;
  background: var(--green);
  clip-path: polygon(100% 0, 100% 100%, 0 0);
  opacity: 0.18;
}

.article-meta-top {
  max-width: var(--max-w);
  margin: 0 auto 0.75rem;
  display: flex;
  gap: 1rem;
  align-items: center;
  flex-wrap: wrap;
}

.breadcrumb-link {
  font-size: 0.82rem;
  color: var(--yellow);
  text-decoration: none;
  font-weight: 600;
}

.breadcrumb-link:hover { color: var(--green); }

.breadcrumb-sep { color: var(--off); font-size: 0.82rem; }

.article-date {
  font-size: 0.8rem;
  color: var(--off);
  font-weight: 500;
}

.article-h1 {
  font-size: clamp(1.8rem, 4vw, 3.2rem);
  color: var(--green);
  max-width: var(--max-w);
  margin: 0 auto 0.75rem;
  text-align: right;
  position: relative;
  z-index: 2;
}

.article-desc {
  max-width: var(--max-w);
  margin: 0 auto;
  color: var(--yellow);
  text-align: right;
  position: relative;
  z-index: 2;
}

.article-hero-wrap {
  max-width: var(--max-w);
  margin: 1.5rem auto 0;
}

.article-hero-img {
  width: 100%;
  height: auto;
  border-radius: var(--radius);
  border: var(--border);
}

.article-body-section { background: var(--white); }

/* article prose styles */
.article-content h2 {
  font-size: 1.5rem;
  margin: 2rem 0 0.5rem;
  padding-left: 0.75rem;
  border-left: 5px solid var(--green);
}

.article-content h3 {
  font-size: 1.15rem;
  margin: 1.5rem 0 0.4rem;
}

.article-content p { margin-bottom: 1rem; }

.article-content a { color: var(--mid); font-weight: 600; }

.article-content ul, .article-content ol {
  margin: 0.75rem 0 1rem 1.5rem;
}

.article-content ul { list-style: disc; }
.article-content ol { list-style: decimal; }

.article-content li { margin-bottom: 0.4rem; line-height: 1.6; }

/* ============================================================
   PAGE: TAG
   ============================================================ */
.tag-header-section {
  background: var(--yellow);
  padding: 3.5rem 2rem 3rem;
  border-bottom: var(--border-thick);
  position: relative;
  overflow: hidden;
}

.tag-header-section::after {
  content: '';
  position: absolute;
  bottom: 0; left: 0;
  width: 100%; height: 8px;
  background: repeating-linear-gradient(
    90deg,
    var(--dark) 0, var(--dark) 12px,
    var(--green) 12px, var(--green) 24px
  );
}

.tag-label-row {
  max-width: var(--max-w);
  margin: 0 auto 0.75rem;
}

.tag-badge {
  display: inline-block;
  background: var(--dark);
  color: var(--green);
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.15em;
  padding: 0.25rem 0.75rem;
  border-radius: 2px;
  text-transform: uppercase;
}

.tag-h1 {
  font-size: clamp(2rem, 5vw, 4rem);
  color: var(--dark);
  text-align: right;
  max-width: var(--max-w);
  margin: 0 auto 0.5rem;
}

.tag-sub {
  text-align: right;
  max-width: var(--max-w);
  margin: 0 auto;
  color: var(--dark);
}

.tag-body-section { background: var(--white); }

/* ============================================================
   PAGE: ABOUT
   ============================================================ */
.about-header-section {
  background: var(--green);
  padding: 4rem 2rem 3rem;
  border-bottom: var(--border-thick);
  position: relative;
  overflow: hidden;
}

.about-deco { position: absolute; inset: 0; pointer-events: none; }

.deco-tri--about {
  position: absolute;
  bottom: -30px; right: 5%;
  width: 0; height: 0;
  border-left: 100px solid transparent;
  border-right: 100px solid transparent;
  border-top: 160px solid var(--dark);
  opacity: 0.12;
}

.deco-circle {
  position: absolute;
  top: 20px; left: 3%;
  width: 100px; height: 100px;
  border: 6px solid var(--dark);
  border-radius: 50%;
  opacity: 0.2;
}

.about-h1 {
  font-size: clamp(2rem, 5vw, 4rem);
  color: var(--dark);
  text-align: right;
  max-width: var(--max-w);
  margin: 0 auto 0.75rem;
  position: relative;
  z-index: 2;
}

.about-sub {
  text-align: right;
  max-width: var(--max-w);
  margin: 0 auto;
  color: var(--dark);
  position: relative;
  z-index: 2;
}

.about-body-section { background: var(--white); }

.about-features-section {
  background: var(--dark);
  padding: 3rem 2rem;
  border-top: var(--border-thick);
}

.about-features-section h2 {
  color: var(--green);
  font-size: 1.6rem;
  text-align: center;
  max-width: var(--max-w);
  margin: 0 auto 0.35rem;
}

.about-features-section .subtitle {
  text-align: center;
  color: var(--yellow);
  max-width: var(--max-w);
  margin: 0 auto 2rem;
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 1.25rem;
  max-width: var(--max-w);
  margin: 0 auto;
}

.feature-item {
  background: var(--white);
  border: var(--border);
  border-radius: var(--radius);
  padding: 1.5rem;
  border-bottom: 5px solid var(--yellow);
  transition: transform var(--transition);
}

.feature-item:hover { transform: translateY(-4px) rotate(-0.5deg); }

.feat-num {
  display: block;
  font-family: var(--font-display);
  font-size: 2rem;
  color: var(--green);
  margin-bottom: 0.5rem;
  line-height: 1;
  /* green on white needs dark bg patch */
  background: var(--dark);
  display: inline-block;
  padding: 0.1rem 0.4rem;
  border-radius: 3px;
  margin-bottom: 0.75rem;
}

.feature-item strong {
  display: block;
  font-size: 1rem;
  margin-bottom: 0.4rem;
  font-family: var(--font-display);
}

.feature-item p { font-size: 0.88rem; color: #444; margin: 0; }

/* ============================================================
   PAGE: PRIVACY
   ============================================================ */
.privacy-header-section {
  background: var(--dark);
  padding: 3.5rem 2rem 2.5rem;
  border-bottom: var(--border-thick);
}

.privacy-h1 {
  font-size: clamp(1.8rem, 4vw, 3rem);
  color: var(--yellow);
  text-align: right;
  max-width: var(--max-w);
  margin: 0 auto 0.75rem;
}

.privacy-sub {
  text-align: right;
  color: var(--off);
  max-width: var(--max-w);
  margin: 0 auto;
}

.privacy-date {
  text-align: right;
  color: var(--green);
  font-size: 0.82rem;
  max-width: var(--max-w);
  margin: 0.5rem auto 0;
}

.privacy-body-section { background: var(--white); }

.privacy-content h2 {
  font-size: 1.3rem;
  margin: 2rem 0 0.5rem;
  border-left: 4px solid var(--yellow);
  padding-left: 0.75rem;
}

.privacy-content p { margin-bottom: 0.9rem; }

/* ============================================================
   Page Content Body (generic prose wrapper)
   ============================================================ */
.page-content-body {
  min-width: 0;
  font-size: 1rem;
  line-height: 1.75;
}

.page-content-body h2 {
  font-size: 1.5rem;
  margin: 2rem 0 0.35rem;
}

.page-content-body p { margin-bottom: 1rem; }

.page-content-body a { color: var(--mid); font-weight: 600; }

/* ============================================================
   Footer — footer 极简 (p + small)
   ============================================================ */
.site-footer {
  background: var(--dark);
  border-top: var(--border-thick);
  padding: 0 1.25rem 1.5rem;
  position: relative;
  overflow: hidden;
}

.site-footer::before {
  content: '';
  display: block;
  width: 100%;
  height: 8px;
  background: repeating-linear-gradient(
    90deg,
    var(--green) 0, var(--green) 16px,
    var(--yellow) 16px, var(--yellow) 32px,
    var(--dark) 32px, var(--dark) 34px
  );
  margin-bottom: 0;
}

.footer-cta {
  max-width: var(--max-w);
  margin: 0 auto;
  background: var(--green);
  border: var(--border);
  border-top: none;
  padding: 2rem 2rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 1rem;
  border-radius: 0 0 var(--radius) var(--radius);
  margin-bottom: 1.5rem;
}

.footer-cta-text {
  font-family: var(--font-display);
  font-size: 1.25rem;
  color: var(--dark);
  font-weight: 700;
  margin: 0;
}

.footer-cta-btn {
  display: inline-block;
  background: var(--dark);
  color: var(--green);
  font-weight: 700;
  font-family: var(--font-display);
  padding: 0.75rem 1.75rem;
  border: 2px solid var(--dark);
  border-radius: 4px;
  text-decoration: none;
  font-size: 0.95rem;
  min-height: 44px;
  transition: background var(--transition), color var(--transition);
}

.footer-cta-btn:hover {
  background: var(--yellow);
  color: var(--dark);
  border-color: var(--dark);
}

.footer-brand {
  color: var(--off);
  font-size: 0.9rem;
  text-align: center;
  max-width: var(--max-w);
  margin: 0 auto 0.5rem;
}

.footer-copy {
  display: block;
  color: rgba(245,245,240,0.55);
  font-size: 0.78rem;
  text-align: center;
  max-width: var(--max-w);
  margin: 0 auto;
}

.footer-copy a { color: var(--yellow); }

/* ============================================================
   Responsive — Mobile ≤768px
   ============================================================ */
@media (max-width: 768px) {
  .site-nav {
    grid-template-columns: 1fr;
    grid-template-rows: auto auto auto;
    padding: 0.5rem 0.75rem;
    gap: 0.5rem;
  }

  .nav-brand { order: -1; text-align: center; }
  .nav-left { justify-content: center; order: 0; }
  .nav-right { justify-content: center; order: 1; }

  .site-nav ol li a {
    font-size: 0.78rem;
    padding: 0.25rem 0.5rem;
    min-height: 44px;
  }

  .brand-link { font-size: 1.1rem; transform: none; }

  .content-wrap {
    grid-template-columns: 1fr;
    padding: 1.25rem 0.85rem;
  }

  .sidebar { position: static; margin-top: 2rem; }

  .hero-section { min-height: 100vh; padding: 2rem 1rem 5rem; align-items: center; }

  .hero-h1 { font-size: clamp(2rem, 10vw, 3.5rem); }

  .hero-cta { font-size: 0.9rem; padding: 0.75rem 1.5rem; min-height: 44px; }

  .channel-h1, .article-h1, .tag-h1, .about-h1 {
    font-size: clamp(1.6rem, 7vw, 2.5rem);
  }

  .card-list { grid-template-columns: 1fr; }

  .features-grid { grid-template-columns: 1fr 1fr; }

  .footer-cta { flex-direction: column; align-items: flex-start; border-radius: var(--radius); }

  .footer-cta-btn { min-height: 44px; }

  .channel-hero, .article-header-section, .tag-header-section,
  .about-header-section, .privacy-header-section {
    padding: 2.5rem 1rem 2rem;
  }
}

@media (max-width: 420px) {
  .features-grid { grid-template-columns: 1fr; }
  .nav-brand .brand-link { font-size: 0.95rem; }
}

/* ============================================================
   Animations & Stagger (prefers-reduced-motion aware)
   ============================================================ */
@media (prefers-reduced-motion: no-preference) {
  .card-list li > article.card {
    animation: fadeUp 0.4s both;
  }

  .card-list li:nth-child(1) > article { animation-delay: 0s; }
  .card-list li:nth-child(2) > article { animation-delay: 0.07s; }
  .card-list li:nth-child(3) > article { animation-delay: 0.14s; }
  .card-list li:nth-child(4) > article { animation-delay: 0.21s; }
  .card-list li:nth-child(5) > article { animation-delay: 0.28s; }
  .card-list li:nth-child(6) > article { animation-delay: 0.35s; }

  @keyframes fadeUp {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
  }

  .hero-h1 {
    animation: heroSlide 0.6s cubic-bezier(0.22,1,0.36,1) both;
    animation-delay: 0.1s;
  }

  .hero-cta {
    animation: heroSlide 0.5s cubic-bezier(0.22,1,0.36,1) both;
    animation-delay: 0.3s;
  }

  @keyframes heroSlide {
    from { opacity: 0; transform: translateX(30px); }
    to { opacity: 1; transform: translateX(0); }
  }

  .sidebar { animation: fadeUp 0.5s both 0.2s; }

  .feature-item {
    animation: fadeUp 0.4s both;
  }

  .feature-item:nth-child(1) { animation-delay: 0.05s; }
  .feature-item:nth-child(2) { animation-delay: 0.12s; }
  .feature-item:nth-child(3) { animation-delay: 0.19s; }
  .feature-item:nth-child(4) { animation-delay: 0.26s; }
}

/* ============================================================
   Utility
   ============================================================ */
.sr-only {
  position: absolute;
  width: 1px; height: 1px;
  overflow: hidden;
  clip: rect(0,0,0,0);
  white-space: nowrap;
}