/* roulang page: index */
:root {
  --color-ink: #0B1713;
  --color-abyss: #07130F;
  --color-panel: #10251D;
  --color-volt: #C8F542;
  --color-volt-dim: rgba(200, 245, 66, .14);
  --color-teal: #2DD4BF;
  --color-sun: #F4B942;
  --color-paper: #F3F6F2;
  --color-card: #FFFFFF;
  --color-line: #D9E2DA;
  --color-muted: #5B6B62;
  --color-white: #fff;
  --radius-card: 12px;
  --radius-image: 16px;
  --shadow-card: rgba(7, 19, 15, .06) 0 10px 30px;
  --shadow-hover: rgba(7, 19, 15, .12) 0 18px 40px;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  background: #fff;
  color: var(--color-ink);
  line-height: 1.75;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; display: block; }
a { text-decoration: none; color: inherit; }
button, input { font-family: inherit; }
.container { max-width: 1280px; margin: 0 auto; padding: 0 28px; }
.section { padding: 96px 0; }
.dark { background: var(--color-abyss); color: #DFE8E2; }
.dark .section-title { color: #fff; }
.section-title {
  font-size: 32px;
  font-weight: 800;
  line-height: 1.25;
  letter-spacing: -0.5px;
  margin: 0 0 18px;
}
.section-desc { color: var(--color-muted); font-size: 16px; max-width: 640px; line-height: 1.9; margin: 0; }
.section-head { margin-bottom: 52px; display: flex; flex-wrap: wrap; align-items: flex-end; justify-content: space-between; gap: 20px; }
.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 13px;
  font-weight: 700;
  letter-spacing: .04em;
  color: var(--color-teal);
  text-transform: uppercase;
  margin-bottom: 16px;
}
.eyebrow::before { content: ""; width: 16px; height: 2px; background: currentColor; display: inline-block; }
.number-title {
  display: inline-block;
  font-size: 15px;
  font-weight: 800;
  color: var(--color-volt);
  margin-right: 14px;
  vertical-align: upper;
  letter-spacing: .05em;
}

/* Header */
.site-header {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 50;
  background: rgba(7, 19, 15, .88);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid rgba(255,255,255,.08);
  transition: box-shadow .3s ease, background .3s ease;
}
.site-header.scrolled { box-shadow: 0 10px 40px rgba(0,0,0,.35); background: rgba(7,19,15,.96); }
.header-inner {
  max-width: 1280px;
  margin: auto;
  padding: 0 28px;
  height: 76px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 32px;
}
.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 21px;
  font-weight: 900;
  color: #fff;
  white-space: nowrap;
  line-height: 1;
}
.brand-mark {
  width: 30px; height: 30px;
  border-radius: 8px;
  background: var(--color-volt);
  color: var(--color-abyss);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-weight: 900;
  font-size: 16px;
  flex-shrink: 0;
}
.main-nav { display: flex; align-items: center; gap: 30px; }
.nav-link {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  font-size: 15px;
  font-weight: 600;
  color: #B7CBC1;
  border-bottom: 2px solid transparent;
  transition: color .2s, border-color .2s;
  position: relative;
}
.nav-link:hover { color: #fff; }
.nav-link.active { color: var(--color-volt); border-bottom-color: var(--color-volt); }
.header-cta {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  height: 42px;
  background: var(--color-volt);
  color: var(--color-abyss);
  font-size: 14px;
  font-weight: 700;
  border-radius: 10px;
  padding: 0 20px;
  white-space: nowrap;
  transition: background .2s, transform .2s, box-shadow .2s;
}
.header-cta:hover { background: #D8FA5C; transform: translateY(-1px); box-shadow: 0 8px 30px rgba(200,245,66,.2); }
.header-cta:active { transform: scale(.97); }
.menu-btn {
  display: none;
  width: 44px; height: 44px;
  background: transparent;
  border: 1px solid rgba(255,255,255,.2);
  border-radius: 8px;
  color: #fff;
  align-items: center;
  justify-content: center;
  cursor: pointer;
}
.mobile-drawer {
  display: none;
  background: var(--color-abyss);
  border-top: 1px solid rgba(255,255,255,.08);
  padding: 20px 28px 32px;
}
.mobile-drawer .nav-link {
  width: 100%;
  min-height: 52px;
  font-size: 17px;
  border-bottom: 1px solid rgba(255,255,255,.07);
  color: #DFE8E2;
  border-left: 2px solid transparent;
  padding-left: 12px;
}
.mobile-drawer .nav-link.active { color: var(--color-volt); border-left-color: var(--color-volt); background: rgba(200,245,66,.08); }

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  height: 50px;
  padding: 0 26px;
  border-radius: 10px;
  font-size: 15px;
  font-weight: 700;
  cursor: pointer;
  transition: all .25s ease;
  border: 1px solid transparent;
}
.btn:focus-visible { outline: 3px solid var(--color-volt); outline-offset: 2px; }
.btn-primary { background: var(--color-volt); color: var(--color-abyss); }
.btn-primary:hover { background: #D9FA62; transform: translateY(-2px); box-shadow: 0 14px 34px rgba(200,245,66,.24); }
.btn-primary:active { transform: scale(.97); }
.btn-ghost-light { border-color: rgba(255,255,255,.35); color: #fff; background: transparent; }
.btn-ghost-light:hover { background: rgba(255,255,255,.08); border-color: rgba(255,255,255,.6); }
.btn-outline { border-color: var(--color-ink); color: var(--color-ink); background: transparent; }
.btn-outline:hover { background: rgba(200,245,66,.12); border-color: var(--color-ink); }
.btn-sm { height: 40px; padding: 0 18px; font-size: 13px; border-radius: 8px; }

/* Hero */
.hero {
  background-color: var(--color-abyss);
  color: #fff;
  padding: 170px 0 72px;
  position: relative;
  overflow: hidden;
}
.hero-bg {
  position: absolute;
  inset: 0;
  background: radial-gradient(circle at 12% 24%, rgba(200,245,66,.12), transparent 33%), radial-gradient(circle at 90% 15%, rgba(45,212,191,.10), transparent 28%), radial-gradient(rgba(200,245,66,.12) 1px, transparent 1px);
  background-size: auto, auto, 34px 34px;
  background-position: 0 0, 0 0, 0 0;
  opacity: .5;
  pointer-events: none;
}
.hero-bg img { width: 100%; height: 100%; object-fit: cover; opacity: .22; }
.hero-inner {
  position: relative;
  z-index: 2;
  display: grid;
  grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
  gap: 60px;
  align-items: center;
}
.hero .tag-chip {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  border: 1px solid rgba(200,245,66,.4);
  border-radius: 999px;
  padding: 6px 14px;
  font-size: 13px;
  color: var(--color-volt);
  background: rgba(200,245,66,.08);
  margin-bottom: 28px;
}
.hero h1 {
  font-size: 52px;
  font-weight: 900;
  line-height: 1.16;
  letter-spacing: -1px;
  margin: 0 0 18px;
  max-width: 760px;
}
.hero-sub {
  font-size: 17px;
  color: #A9C4B6;
  line-height: 1.9;
  max-width: 560px;
  margin-bottom: 38px;
}
.hero-actions { display: flex; flex-wrap: wrap; gap: 14px; align-items: center; margin-bottom: 50px; }
.hero-card-panel {
  background: rgba(16,37,29,.66);
  border: 1px solid rgba(255,255,255,.13);
  border-radius: 20px;
  overflow: hidden;
  backdrop-filter: blur(6px);
  box-shadow: 0 30px 80px rgba(0,0,0,.5);
}
.hero-visual-img { background: #d4e0d8; border-radius: 20px; overflow: hidden; aspect-ratio: 4/3; }
.hero-visual-img img { width: 100%; height: 100%; object-fit: cover; }
.hero-card-caption {
  padding: 16px 20px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  border-top: 1px solid rgba(255,255,255,.1);
  color: #A9C4B6;
  font-size: 13px;
}
.hero-stat-grid {
  display: flex;
  gap: 20px;
  margin-top: 52px;
  flex-wrap: wrap;
  padding-top: 30px;
  border-top: 1px solid rgba(255,255,255,.1);
}
.hero-stat { display: flex; flex-direction: column; } 
.hero-stat strong { font-size: 28px; color: #fff; font-weight: 800; letter-spacing: .5px; line-height: 1; }
.hero-stat span { font-size: 13px; color: #7F9A8C; margin-top: 8px; }

/* Cards & misc */
.content-card {
  background: #fff;
  border: 1px solid rgba(11,23,19,.05);
  border-radius: 12px;
  box-shadow: var(--shadow-card);
  transition: transform .35s ease, box-shadow .35s ease;
}
.content-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-hover); }
.video-card { border-radius: var(--radius-image); overflow: hidden; }
.image-cover { aspect-ratio: 16/10; width: 100%; object-fit: cover; background: #DDE5DF; }

/* Value */
.value-wrap { display: grid; grid-template-columns: minmax(0, 5fr) minmax(0, 7fr); gap: 64px; }
.value-sticky { position: sticky; top: 110px; align-self: start; }
.value-list { display: flex; flex-direction: column; }
.value-item {
  border-top: 1px solid var(--color-line);
  padding: 28px 0 16px;
  display: grid;
  grid-template-columns: 44px 1fr;
  gap: 16px;
}
.value-item:last-child { border-bottom: 1px solid var(--color-line); }
.value-icon {
  width: 42px; height: 42px;
  border-radius: 12px;
  background: var(--color-volt-dim);
  color: #4B6B3B;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 800;
}
.value-media { margin: 20px 0; border-radius: 16px; aspect-ratio: 4/3; overflow: hidden; }

/* Feature grid */
.feature-grid-2x2 { gap: 24px; display: grid; grid-template-columns: 1fr 1fr; }
.feature-card { border-radius: 12px; padding: 32px 30px; border: 1px solid rgba(11,23,19,.06); background: #fff; box-shadow: var(--shadow-card); transition: transform .3s ease, box-shadow .3s ease, border-top .2s ease; border-top: 2px solid transparent; }
.feature-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-hover); border-top-color: var(--color-volt); }
.feature-card.darktone { background: var(--color-panel); color: #fff; border-color: transparent; }
.feature-card.darktone:hover { border-top-color: var(--color-volt); }
.feature-card h3 { font-size: 20px; font-weight: 800; margin: 26px 0 12px; }
.feature-points { margin: 0; padding: 0; list-style: none; }
.feature-points li { padding: 3px 0 3px 24px; position: relative; font-size: 14px; color: var(--color-muted); line-height: 1.8; }
.feature-card.darktone .feature-points li { color: #A9C4B6; }
.feature-points li::before { content: ""; position: absolute; left: 2px; top: 12px; width: 6px; height: 6px; background: var(--color-volt); }
.feature-icon-badge { width: 48px; height: 48px; border-radius: 14px; background: #F1F7EF; display: flex; align-items: center; justify-content: center; color: #314B3A; font-size: 22px; }
.feature-card.darktone .feature-icon-badge { background: rgba(200,245,66,.15); color: var(--color-volt); }

/* Scenarios */
.scen-wrap { display: grid; grid-template-columns: 5fr 7fr; gap: 64px; align-items: center; }
.scene-visual { aspect-ratio: 4/5; border-radius: 20px; overflow: hidden; background: #d9e1dd; }
.scene-list { display: flex; flex-direction: column; }
.scene-item {
  padding: 30px 0;
  border-top: 1px solid var(--color-line);
  display: grid;
  grid-template-columns: 64px 1fr;
  gap: 22px;
  align-items: start;
}
.scene-item:first-of-type { border-top: none; }
.scene-num { font-size: 14px; font-weight: 900; color: var(--color-sun); letter-spacing: .03em; }
.scene-item h3 { font-size: 20px; font-weight: 800; margin: 0 0 8px; color: var(--color-ink); }
.scene-item p { font-size: 15px; color: var(--color-muted); line-height: 1.85; margin: 0 0 13px; }
.scene-link { font-weight: 700; font-size: 14px; color: var(--color-teal); display: inline-flex; align-items: center; gap: 6px; }

/* Cases / featured content */
.case-board { display: grid; grid-template-columns: 1.25fr .75fr; gap: 28px; align-items: stretch; }
.case-main {
  background: var(--color-panel);
  border-radius: 18px;
  overflow: hidden;
  color: #fff;
  box-shadow: 0 20px 60px rgba(7,19,15,.24);
  min-height: 500px;
  display: flex;
  flex-direction: column;
}
.case-main figure { margin: 0; aspect-ratio: 16/8; overflow: hidden; }
.case-main figure img { width: 100%; height: 100%; object-fit: cover; }
.case-main-body { padding: 32px; }
.case-main-meta { display: flex; gap: 10px; flex-wrap: wrap; margin-bottom: 18px; }
.chip, .badge {
  display: inline-flex;
  align-items: center;
  padding: 4px 12px;
  border-radius: 999px;
  font-size: 12px;
  font-weight: 600;
  border: 1px solid var(--color-line);
  color: var(--color-muted);
  background: #F7F9F6;
}
.dark .chip { background: rgba(255,255,255,.09); color: #B7CBC1; border-color: transparent; }
.badge-volt { background: var(--color-volt-dim); color: var(--color-volt); }
.case-index-list { display: flex; flex-direction: column; gap: 18px; }
.case-idx-card {
  background: #fff;
  border: 1px solid rgba(11,23,19,.06);
  box-shadow: var(--shadow-card);
  border-radius: 14px;
  padding: 22px 24px;
  transition: transform .25s ease, box-shadow .25s ease, border-color .25s ease;
  cursor: default;
}
.case-idx-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-hover); border-color: rgba(45,212,191,.5); }
.case-idx-card strong { display: block; font-size: 16px; font-weight: 800; margin-bottom: 6px; }
.case-idx-card p { font-size: 13px; color: var(--color-muted); margin: 0; }

/* Pricing */
.pricing-row { display: grid; grid-template-columns: 1fr 1.1fr 1fr; gap: 24px; align-items: stretch; }
.price-card { border-radius: 16px; padding: 38px 34px; background: #fff; border: 1px solid rgba(11,23,19,.07); box-shadow: var(--shadow-card); position: relative; display: flex; flex-direction: column; }
.price-card.featured { background: var(--color-abyss); color: #fff; border: 1px solid rgba(200,245,66,.3); box-shadow: 0 30px 70px rgba(7,19,15,.4); }
.price-card .rec-flag {
  position: absolute;
  top: -13px;
  left: 32px;
  background: var(--color-volt);
  color: var(--color-abyss);
  border-radius: 999px;
  padding: 5px 14px;
  font-size: 12px;
  font-weight: 900;
  box-shadow: 0 8px 24px rgba(200,245,66,.3);
}
.price-name { font-size: 17px; font-weight: 800; }
.price-quote { margin: 16px 0; display: flex; align-items: baseline; gap: 6px; }
.price-quote strong { font-size: 40px; font-weight: 900; letter-spacing: -1px; }
.price-quote span { font-size: 15px; color: var(--color-muted); }
.featured .price-quote span { color: #A9C4B6; }
.price-desc { font-size: 14px; color: var(--color-muted); line-height: 1.8; margin-bottom: 26px; }
.featured .price-desc { color: #A9C4B6; }
.price-list { list-style: none; padding: 0; margin: 0 0 34px; flex: 1; }
.price-list li { padding: 5px 0 5px 24px; position: relative; font-size: 14px; color: #39453E; line-height: 1.8; }
.featured .price-list li { color: #BCCFC5; }
.price-list li::before { content: ""; position: absolute; left: 0; top: 15px; width: 7px; height: 7px; background: var(--color-volt); }
.featured .price-list li::before { background: var(--color-volt); }

/* FAQ */
.faq-layout { display: grid; grid-template-columns: 4fr 8fr; gap: 60px; align-items: start; }
.faq-side { position: sticky; top: 110px; }
.faq-list { display: flex; flex-direction: column; }
.faq-item { border-bottom: 1px solid var(--color-line); }
.faq-item:first-child { border-top: 1px solid var(--color-line); }
.faq-q {
  width: 100%;
  text-align: left;
  padding: 20px 4px;
  background: transparent;
  border: 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  cursor: pointer;
  color: var(--color-ink);
  font-size: 16px;
  font-weight: 800;
  transition: color .2s;
  min-height: 60px;
}
.faq-q:hover { color: #4C6B3C; }
.faq-q .arrow { transition: transform .3s ease; color: var(--color-muted); flex-shrink: 0; display: inline-flex; }
.faq-item.open .faq-q .arrow { transform: rotate(45deg); color: var(--color-ink); }
.faq-a { max-height: 0; overflow: hidden; transition: max-height .4s ease; }
.faq-a-inner {
  padding: 0 4px 22px;
  color: var(--color-muted);
  font-size: 15px;
  line-height: 1.9;
  border-left: 2px solid var(--color-volt);
  padding-left: 18px;
}

/* Post / update */
.update-panel { background: var(--color-paper); border-radius: 18px; border: 2px dashed var(--color-line); padding: 40px 20px; text-align: center; color: var(--color-muted); }
.update-grid { display: grid; grid-template-columns: repeat(12, 1fr); gap: 24px; }
.update-card {
  grid-column: span 4;
  background: #fff;
  border: 1px solid rgba(11,23,19,.06);
  border-radius: 14px;
  padding: 26px 26px 22px;
  box-shadow: var(--shadow-card);
  transition: transform .3s ease, box-shadow .3s ease;
  display: flex;
  flex-direction: column;
}
.update-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-hover); }
.update-tag { margin-bottom: 14px; display: inline-flex; width: fit-content; }
.update-card h3 { font-size: 18px; font-weight: 800; margin: 0 0 10px; line-height: 1.5; }
.update-card p { font-size: 14px; color: var(--color-muted); margin: 0 0 20px; flex: 1; overflow: hidden; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; }
.update-meta { display: flex; gap: 12px; align-items: center; justify-content: space-between; font-size: 12px; color: var(--color-muted); }
.update-meta span { display: flex; align-items: center; gap: 6px; }

/* CTA */
.cta-block { background: var(--color-abyss); border-radius: 28px; padding: 80px 60px; text-align: center; position: relative; overflow: hidden; }
.cta-block::before { content: ""; position: absolute; inset: 0; background: radial-gradient(circle at 80% 0%, rgba(200,245,66,.1), transparent 40%); }
.cta-inner { position: relative; z-index: 2; }
.cta-block p { font-size: 18px; color: #A9C4B6; max-width: 620px; margin: 12px auto 32px; }
.cta-actions { display: flex; gap: 14px; justify-content: center; flex-wrap: wrap; }

/* Footer */
.site-footer { background: var(--color-abyss); color: #A9C4B6; padding: 60px 0 0; }
.footer-top { display: flex; justify-content: space-between; gap: 64px; padding-bottom: 40px; border-bottom: 1px solid rgba(255,255,255,.08); }
.footer-brand .brand { margin-bottom: 14px; }
.footer-brand p { font-size: 14px; max-width: 320px; line-height: 1.9; }
.footer-links { display: flex; gap: 60px; }
.footer-links ul { list-style: none; margin: 0; padding: 0; }
.footer-links h4 { color: #fff; font-size: 14px; font-weight: 800; margin: 0 0 14px; }
.footer-links a { font-size: 14px; color: #A9C4B6; display: inline-block; padding: 5px 0; transition: color .2s; }
.footer-links a:hover { color: var(--color-volt); }
.footer-mid { padding: 22px 0 32px; border-bottom: 1px solid rgba(255,255,255,.08); }
.footer-mid ul { display: flex; flex-wrap: wrap; list-style: none; padding: 0; margin: 0; gap: 20px; }
.footer-bottom { display: flex; align-items: center; justify-content: space-between; gap: 12px; padding: 22px 0 36px; font-size: 13px; flex-wrap: wrap; }

/* Mobile responsiveness */
@media (max-width: 1024px) {
  .hero-inner { grid-template-columns: 1fr; gap: 40px; }
  .value-wrap, .faq-layout { grid-template-columns: 1fr; gap: 40px; }
  .value-sticky, .faq-side { position: static; }
  .case-board, .pricing-row, .scen-wrap { grid-template-columns: 1fr; }
  .feature-grid-2x2 { grid-template-columns: 1fr 1fr; }
  .main-nav { display: none; }
  .header-cta-desktop { display: none; }
  .menu-btn { display: inline-flex; }
  .mobile-drawer.open { display: block; }
  .footer-top { flex-direction: column; gap: 32px; }
}
@media (max-width: 768px) {
  .section { padding: 64px 0; }
  .container { padding: 0 20px; }
  .section-title { font-size: 28px; }
  .hero h1 { font-size: 36px; }
  .hero-sub { font-size: 16px; }
  .feature-grid-2x2 { grid-template-columns: 1fr; }
  .update-card { grid-column: span 12; }
  .update-grid { grid-template-columns: 1fr; }
  .cta-block { padding: 48px 20px; border-radius: 18px; }
  .value-item { grid-template-columns: 1fr; gap: 8px; }
  .scene-list { margin-top: 0; }
  .section-head { margin-bottom: 34px; flex-direction: column; }
  .footer-mid { display: none; }
}

/* roulang page: article */
:root {
  --ink: #0B1713;
  --abyss: #07130F;
  --panel: #10251D;
  --volt: #C8F542;
  --volt-dim: rgba(200, 245, 66, .14);
  --teal: #2DD4BF;
  --sun: #F4B942;
  --paper: #F3F6F2;
  --card: #FFFFFF;
  --line: #D9E2DA;
  --muted: #5B6B62;
  --white: #FFFFFF;
  --dark-soft: #A9C4B6;
}

/* ===== 基础 ===== */
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;font-family:ui-sans-serif,system-ui,-apple-system,'Segoe UI',Roboto,'PingFang SC','Hiragino Sans GB','Microsoft YaHei',sans-serif;background:#F3F6F2;color:#0B1713;line-height:1.7;-webkit-font-smoothing:antialiased}
img{max-width:100%;display:block}
a{text-decoration:none;color:inherit}
ul,ol{margin:0;padding:0}
button{font:inherit;border:0;cursor:pointer;background:none;padding:0}
h1,h2,h3,h4,p{margin:0}

.container{max-width:1280px;margin-left:auto;margin-right:auto;padding-left:24px;padding-right:24px}

/* ===== Header ===== */
.site-header{position:sticky;top:0;z-index:100;background:rgba(7,19,15,.96);backdrop-filter:blur(16px);border-bottom:1px solid rgba(255,255,255,.05);box-shadow:0 1px 0 rgba(255,255,255,.02);transition:box-shadow .3s}
.site-header.scrolled{box-shadow:0 12px 34px rgba(0,0,0,.3)}
.header-inner{max-width:1280px;margin:0 auto;padding:0 24px;height:72px;display:flex;align-items:center;justify-content:space-between;gap:28px}
.brand{display:inline-flex;align-items:center;gap:11px;color:#fff;font-weight:800;font-size:20px;letter-spacing:.5px}
.brand-mark{display:inline-flex;align-items:center;justify-content:center;width:38px;height:38px;border-radius:10px;background:var(--volt);color:var(--ink);font-weight:900;font-size:19px;flex:none;box-shadow:0 0 0 4px rgba(200,245,66,.14)}
.main-nav{display:flex;align-items:center;gap:34px}
.main-nav .nav-link{position:relative;color:rgba(255,255,255,.68);font-size:15px;font-weight:500;padding:18px 2px;transition:color .2s}
.main-nav .nav-link:hover{color:#fff}
.main-nav .nav-link.active{color:var(--volt)}
.main-nav .nav-link.active::after{content:'';position:absolute;bottom:0;left:0;right:0;height:2px;border-radius:2px;background:var(--volt)}
.header-cta{display:inline-flex;align-items:center;justify-content:center;height:42px;padding:0 20px;background:var(--volt);color:var(--ink);font-weight:700;font-size:14px;border-radius:10px;transition:all .2s;flex:none}
.header-cta:hover{transform:translateY(-2px);box-shadow:0 10px 24px rgba(200,245,66,.2)}
.header-cta-desktop{display:inline-flex}
.menu-btn{display:none;align-items:center;justify-content:center;width:44px;height:44px;color:#fff;border-radius:10px;transition:background .2s}
.menu-btn:hover{background:rgba(255,255,255,.08)}

.mobile-drawer{display:block;position:fixed;top:72px;left:0;right:0;bottom:0;background:rgba(7,19,15,.98);backdrop-filter:blur(20px);padding:18px 24px 40px;z-index:99;transform:translateX(100%);transition:transform .2s ease}
.mobile-drawer.open{transform:translateX(0)}
.mobile-drawer .nav-link{display:block;color:#fff;font-size:18px;font-weight:600;padding:15px 4px;border-bottom:1px solid rgba(255,255,255,.08)}
.mobile-drawer .nav-link.active{color:var(--volt)}
.mobile-overlay{position:fixed;inset:0;background:rgba(7,19,15,.5);backdrop-filter:blur(2px);opacity:0;pointer-events:none;transition:opacity .2s;z-index:98}
.mobile-overlay.show{opacity:1;pointer-events:auto}

/* ===== 文章首屏 ===== */
.article-stage{background:var(--abyss);position:relative;padding:56px 0 96px;color:#fff}
.article-stage::before{content:'';position:absolute;inset:0;pointer-events:none;background-image:radial-gradient(rgba(200,245,66,.1) 1px,transparent 1px);background-size:32px 32px;mask-image:linear-gradient(180deg,rgba(0,0,0,.4),transparent 70%)}
.article-breadcrumb{position:relative;z-index:2;display:flex;align-items:center;flex-wrap:wrap;gap:8px;color:#A9C4B6;font-size:14px;margin-bottom:30px}
.article-breadcrumb a{color:rgba(255,255,255,.62);transition:color .2s}
.article-breadcrumb a:hover{color:var(--volt)}
.article-breadcrumb .sep{color:rgba(255,255,255,.3)}
.article-breadcrumb .current{color:var(--volt)}
.article-cat-panel{position:relative;z-index:2;margin-bottom:20px}
.article-cat-chip{display:inline-flex;align-items:center;gap:8px;background:var(--volt-dim);border:1px solid rgba(200,245,66,.28);border-radius:999px;padding:8px 18px;color:#fff;font-size:13px;font-weight:600;letter-spacing:.05em}
.article-cat-chip>span{width:6px;height:6px;border-radius:50%;background:var(--volt)}
.article-stage h1{position:relative;z-index:2;font-size:44px;line-height:1.26;font-weight:900;letter-spacing:.01em;color:#fff;max-width:900px;margin:0 0 20px}
.article-lead{position:relative;z-index:2;color:#A9C4B6;font-size:16px;line-height:1.8;max-width:760px}
.article-meta{position:relative;z-index:2;display:flex;align-items:center;flex-wrap:wrap;gap:14px 24px;margin-top:28px;color:rgba(255,255,255,.58);font-size:13px}
.article-meta .avatar{display:inline-flex;align-items:center;gap:8px}
.article-meta .avatar i{width:24px;height:24px;border-radius:50%;background:rgba(255,255,255,.12)}

/* ===== 正文阅读卡 ===== */
.article-wrap{position:relative;z-index:3;margin:-56px auto 0;max-width:1120px;padding:0 24px}
.article-reader{background:#fff;border-radius:16px;box-shadow:0 20px 60px rgba(7,19,15,.1);padding:28px 40px 52px}
.article-content{max-width:760px;margin:0 auto}
.article-content>*{margin-bottom:24px}
.article-content p{font-size:16px;line-height:2;color:#24352c;margin-bottom:24px}
.article-content h2{font-size:24px;line-height:1.5;font-weight:800;color:var(--ink);margin:44px 0 18px;padding-left:14px;border-left:3px solid var(--volt);border-radius:2px}
.article-content h3{font-size:20px;font-weight:700;color:var(--ink);margin:36px 0 14px}
.article-content a{color:#147a5a;text-decoration:underline;text-underline-offset:4px;transition:color .2s}
.article-content a:hover{color:#0b872f}
.article-content ul,.article-content ol{padding-left:6px;list-style:none}
.article-content ul li,.article-content ol li{position:relative;line-height:1.9;padding-left:22px;color:#24352c;margin-bottom:12px}
.article-content ul li::before{content:'';position:absolute;left:2px;top:12px;width:7px;height:7px;background:var(--volt);transform:rotate(45deg)}
.article-content ol{counter-reset:article-li}
.article-content ol li{counter-increment:article-li}
.article-content ol li::before{content:counter(article-li);position:absolute;left:0;top:-1px;width:18px;height:18px;font-size:12px;font-weight:700;color:var(--ink);background:var(--volt);border-radius:6px;display:inline-flex;align-items:center;justify-content:center;padding:8px}
.article-content blockquote{position:relative;background:#f3f6f2;border-radius:12px;padding:26px 26px 8px;margin:28px 0;color:#34473c}
.article-content blockquote::before{content:'';position:absolute;left:0;top:22px;bottom:22px;width:4px;border-radius:0 10px 10px 0;background:var(--teal)}
.article-content blockquote p{color:#34473c;margin-bottom:14px}
.article-content blockquote p:last-child{margin-bottom:0}
.article-content img{border-radius:14px;width:100%;height:auto}
.article-content figure{margin:36px 0}
.article-content figure img{border-radius:14px}
.article-content figure figcaption{margin-top:10px;font-size:13px;color:var(--muted);text-align:center}
.article-content table{width:100%;border-collapse:collapse;font-size:14px;background:#fff}
.article-content th{background:var(--ink);color:#fff;padding:12px 16px;text-align:left;font-weight:600}
.article-content td{padding:12px 16px;border-bottom:1px solid #e2e8e3}
.article-content code{background:#eef1ec;color:#0d8b6f;padding:3px 8px;border-radius:6px;font-size:14px}
.article-content pre{background:#0b1713;color:#c9d5cd;padding:18px;border-radius:12px;overflow-x:auto;font-size:14px;line-height:1.7}
.article-content pre code{background:transparent;color:inherit;padding:0}

.tag-group{margin-top:46px;padding-top:30px;border-top:1px solid #EAF0EA;display:flex;align-items:center;gap:14px;flex-wrap:wrap}
.tag-label{font-size:14px;color:var(--muted);font-weight:600}
.tag-item{display:inline-flex;align-items:center;background:#f1f5ef;border:1px solid #dce7da;color:#44534a;font-size:13px;border-radius:999px;padding:8px 16px;transition:all .2s}
.tag-item:hover{border-color:var(--volt);background:rgba(200,245,66,.18);color:var(--ink)}
.article-bottom-tools{max-width:760px;margin:40px auto 0;display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:16px}
.article-bottom-tools .tool-group{display:inline-flex;gap:10px;flex-wrap:wrap}

/* ===== 空态 ===== */
.article-empty{max-width:760px;margin:0 auto;padding:80px 30px}
.empty-panel{border:2px dashed #d6e1d3;border-radius:18px;background:#fbfcf9;text-align:center;padding:70px 30px}
.empty-icon{display:inline-flex;align-items:center;justify-content:center;width:72px;height:72px;border-radius:24px;background:rgba(200,245,66,.22);margin-bottom:28px}
.empty-icon svg{width:32px;height:32px;stroke:var(--ink)}
.article-empty h2{font-size:28px;font-weight:800;color:var(--ink);margin-bottom:16px}
.article-empty p{color:var(--muted);font-size:16px;max-width:420px;margin:0 auto 30px;line-height:1.9}

/* ===== 推荐 / 相关模块 ===== */
.article-more{background:#fff;padding:96px 0 100px;border-top:1px solid #e7eee6;border-bottom:1px solid #e7eee6}
.more-grid{display:grid;grid-template-columns:1fr 1fr 1fr;gap:22px}
.more-grid .grid-card{border:1px solid #E5EDE3;background:#fcfdfb;border-radius:14px;padding:30px;display:flex;flex-direction:column;transition:all .3s}
.more-grid .grid-card:hover{box-shadow:0 16px 40px rgba(7,19,15,.08);transform:translateY(-5px);border-color:#2DD4BF}
.more-grid .grid-card .entry-title{font-size:18px;font-weight:800;color:var(--ink);margin:20px 0 12px}
.more-grid .grid-card p{color:#66746a;font-size:14px;line-height:1.8;flex:1}
.more-grid .grid-links{display:inline-flex;gap:2px;align-items:center;color:var(--ink);font-size:15px;font-weight:600;margin-top:26px}
.section-headline{margin-bottom:52px}
.section-eyebrow{display:inline-flex;align-items:center;gap:10px;color:var(--ink);font-weight:800;letter-spacing:.14em;font-size:14px;margin-bottom:14px}
.section-eyebrow i{width:9px;height:9px;background:var(--volt);transform:rotate(45deg);display:inline-block}
.section-title{font-size:34px;line-height:1.35;font-weight:900;color:var(--ink)}

/* ===== 底部 CTA ===== */
.bottom-cta{padding:100px 0;background:var(--abyss);position:relative;overflow:hidden;color:#fff}
.bottom-cta::before{content:'';position:absolute;width:500px;height:500px;right:-160px;top:-200px;border-radius:50%;background:radial-gradient(circle,rgba(200,245,66,.13),transparent 65%)}
.bottom-cta::after{content:'';position:absolute;inset:0;background-image:radial-gradient(rgba(255,255,255,.05) 1px,transparent 1px);background-size:38px 38px;pointer-events:none}
.bottom-cta .inner{position:relative;z-index:2;text-align:center;max-width:760px;margin:0 auto}
.bottom-cta h2{font-size:38px;line-height:1.4;font-weight:900;color:#fff;margin-bottom:24px}
.bottom-cta h2 em{font-style:normal;color:var(--volt)}
.bottom-cta p{color:#A9C4B6;font-size:17px;line-height:1.9;margin-bottom:38px}
.cta-btn-row{display:flex;gap:16px;justify-content:center;flex-wrap:wrap}

/* ===== 按钮 ===== */
.btn{display:inline-flex;align-items:center;justify-content:center;border-radius:12px;padding:14px 28px;font-weight:700;font-size:15px;transition:all .22s;position:relative}
.btn:focus-visible{outline:none;box-shadow:0 0 0 4px rgba(45,212,191,.4)}
.btn-primary{background:var(--volt);color:var(--ink);box-shadow:0 8px 20px rgba(7,19,15,.18)}
.btn-primary:hover{background:#d1fa6b;transform:translateY(-3px);box-shadow:0 14px 30px rgba(200,245,66,.22)}
.btn-primary:active{transform:scale(.98)}
.btn-dark-outline{background:transparent;border:1px solid rgba(45,212,191,.55);color:var(--volt)}
.btn-dark-outline:hover{background:rgba(255,255,255,.06);border-color:var(--volt);transform:translateY(-3px)}
.btn-light-outline{background:transparent;border:1px solid #22382d;color:var(--ink);font-weight:600}
.btn-light-outline:hover{border-color:var(--ink);background:rgba(200,245,66,.08);transform:translateY(-3px)}
.btn-link{display:inline-flex;align-items:center;gap:8px;padding:0;font-size:15px;font-weight:600;color:var(--ink)}
.btn-link svg{transition:transform .2s}
.btn-link:hover svg{transform:translateX(5px)}

/* ===== Footer ===== */
.site-footer{background:#07130F;color:rgba(255,255,255,.7);padding:86px 0 26px}
.footer-top{display:grid;grid-template-columns:1.4fr 1fr;gap:70px;padding-bottom:52px;border-bottom:1px solid rgba(255,255,255,.06)}
.footer-brand p{color:rgba(255,255,255,.55);font-size:15px;max-width:440px;margin-top:22px;line-height:1.9}
.footer-links{display:grid;grid-template-columns:1fr 1fr;gap:40px}
.footer-links h4{color:#fff;font-size:16px;font-weight:700;margin-bottom:22px}
.footer-links ul li{margin-bottom:12px}
.footer-links ul li a{font-size:14px;color:rgba(255,255,255,.55);transition:color .2s}
.footer-links ul li a:hover{color:var(--volt)}
.footer-mid{display:flex;padding:32px 0;border-bottom:1px solid rgba(255,255,255,.06);flex-wrap:wrap;gap:10px 24px}
.footer-mid a{color:rgba(255,255,255,.45);font-size:13px;transition:color .2s}
.footer-mid a:hover{color:var(--volt)}
.footer-bottom{display:flex;justify-content:space-between;gap:18px;margin-top:30px;color:rgba(255,255,255,.34);font-size:13px}

/* ===== 响应式 ===== */
@media(max-width:1100px){
  .footer-top{grid-template-columns:1fr;gap:48px}
  .main-nav{gap:22px}
}
@media(max-width:960px){
  .main-nav{display:none}
  .header-cta-desktop{display:none}
  .menu-btn{display:inline-flex}
  .article-stage h1{font-size:38px}
  .section-title{font-size:28px}
  .more-grid{grid-template-columns:1fr 1fr}
}
@media(max-width:640px){
  .container{padding-left:18px;padding-right:18px}
  .header-inner{padding:0 18px}
  .article-stage{padding:36px 0 86px}
  .article-stage h1{font-size:30px}
  .article-wrap{margin-top:-44px;padding:0 16px}
  .article-reader{padding:24px 20px 42px;border-radius:14px}
  .article-lead{font-size:15px}
  .footer-links{grid-template-columns:1fr}
  .footer-bottom{flex-direction:column;align-items:flex-start}
  .more-grid{grid-template-columns:1fr}
  .article-bottom-tools{flex-direction:column;align-items:flex-start}
  .bottom-cta h2{font-size:27px}
}

/* roulang page: category1 */
:root {
  --color-ink: #0B1713;
  --color-abyss: #07130F;
  --color-panel: #10251D;
  --color-volt: #C8F542;
  --color-volt-dim: rgba(200, 245, 66, .14);
  --color-teal: #2DD4BF;
  --color-sun: #F4B942;
  --color-paper: #F3F6F2;
  --color-card: #FFFFFF;
  --color-line: #D9E2DA;
  --color-muted: #5B6B62;
  --color-white: #FFFFFF;
  --color-soft-white: #A9C4B6;
  --radius: 12px;
  --radius-card: 12px;
  --radius-img: 16px;
  --shadow-card: rgba(7, 19, 15, .06) 0 10px 30px;
  --shadow-hover: rgba(7, 19, 15, .12) 0 18px 40px;
  --font-cn: ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
}
html {
  scroll-behavior: smooth;
}
html body {
  overflow-x: hidden;
}
body {
  margin: 0;
  font-family: var(--font-cn);
  color: var(--color-ink);
  background: var(--color-paper);
  line-height: 1.8;
  -webkit-font-smoothing: antialiased;
}
*, *::before, *::after {
  box-sizing: border-box;
}
img {
  max-width: 100%;
  height: auto;
  display: block;
}
a {
  color: inherit;
  text-decoration: none;
}
button, input {
  font-family: inherit;
  font-size: inherit;
  border: none;
  background: none;
}
ul, ol, p, figure, blockquote {
  margin: 0;
  padding: 0;
}
.container {
  width: 100%;
  max-width: 1280px;
  margin: 0 auto;
  padding-left: clamp(18px, 4vw, 48px);
  padding-right: clamp(18px, 4vw, 48px);
}
.section {
  padding-top: 88px;
  padding-bottom: 88px;
}
@media (max-width: 768px) {
  .section {
    padding-top: 60px;
    padding-bottom: 60px;
  }
}
.scroll-mt {
  scroll-margin-top: 100px;
}
.section-head {
  max-width: 680px;
  margin-bottom: 44px;
}
.section-head .pre-tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 14px;
  border-radius: 999px;
  background: var(--color-volt-dim);
  color: var(--color-ink);
  font-size: 13px;
  font-weight: 700;
  border: 1px solid rgba(11, 23, 19, .12);
  margin-bottom: 18px;
}
.section-head .pre-tag::before {
  content: "";
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--color-volt);
}
.section-head h2,
.section-head h3 {
  font-size: clamp(26px, 3.2vw, 36px);
  line-height: 1.3;
  font-weight: 800;
  letter-spacing: -.01em;
  color: var(--color-ink);
  margin-bottom: 14px;
}
.section-head p {
  color: var(--color-muted);
  font-size: 15px;
  max-width: 620px;
}
.row {
  display: flex;
  flex-wrap: wrap;
}
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 80;
  background: rgba(7, 19, 15, .85);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid rgba(200, 245, 66, .14);
  transition: box-shadow .2s ease, background .2s ease;
}
.site-header.scrolled {
  box-shadow: 0 12px 32px rgba(0, 0, 0, .28);
  background: rgba(7, 19, 15, .94);
}
.header-inner {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 clamp(16px, 4vw, 48px);
  height: 72px;
  display: flex;
  align-items: center;
  gap: 30px;
}
.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: #fff;
  font-size: 18px;
  font-weight: 800;
  letter-spacing: .01em;
}
.brand-mark {
  width: 34px;
  height: 34px;
  border-radius: 10px;
  background: var(--color-volt);
  color: var(--color-ink);
  display: grid;
  place-items: center;
  font-size: 17px;
  font-weight: 900;
  box-shadow: 0 0 0 4px rgba(200, 245, 66, .16);
}
.main-nav {
  display: flex;
  align-items: center;
  gap: 30px;
  margin-left: auto;
}
.main-nav .nav-link {
  color: rgba(255, 255, 255, .78);
  font-size: 14px;
  font-weight: 600;
  padding: 22px 0 16px;
  border-bottom: 2px solid transparent;
  min-height: 48px;
  display: inline-flex;
  align-items: center;
  transition: color .15s ease;
  line-height: 1;
  white-space: nowrap;
}
.main-nav .nav-link:hover {
  color: #ffffff;
}
.main-nav .nav-link.active {
  color: var(--color-volt);
  border-bottom-color: var(--color-volt);
}
.header-cta {
  min-height: 40px;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 0 20px;
  border-radius: 10px;
  background: var(--color-volt);
  color: var(--color-ink);
  font-size: 14px;
  font-weight: 800;
  transition: transform .15s ease, box-shadow .15s ease, background .15s ease;
  box-shadow: 0 8px 20px rgba(200, 245, 66, .2);
}
.header-cta:hover {
  transform: translateY(-2px);
  box-shadow: 0 14px 28px rgba(0, 0, 0, .25);
}
.header-cta:active {
  transform: scale(.98);
}
.header-cta-desktop {
  margin-left: 4px;
}
.menu-btn {
  display: none;
  color: #fff;
  cursor: pointer;
  padding: 10px;
}
.mobile-drawer {
  display: none;
  flex-direction: column;
  gap: 4px;
  padding: 16px clamp(16px, 4vw, 48px) 24px;
  background: var(--color-abyss);
  border-top: 1px solid rgba(255,255,255,.08);
  position: absolute;
  top: 72px;
  left: 0;
  right: 0;
  box-shadow: 0 26px 46px rgba(0, 0, 0, .8);
}
.mobile-drawer.open {
  display: flex;
}
.mobile-drawer .nav-link {
  min-height: 56px;
  color: rgba(255,255,255,.84);
  display: flex;
  align-items: center;
  font-weight: 600;
  padding: 0 8px;
  border-bottom: 1px solid rgba(255,255,255,.06);
  transition: padding-left .15s ease;
}
.mobile-drawer .nav-link:hover {
  padding-left: 14px;
  color: var(--color-volt);
}
.mobile-drawer .nav-link.active {
  color: var(--color-volt);
}
.mobile-drawer .btn-primary {
  margin-top: 15px;
  display: inline-flex;
  justify-content: center;
}
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  min-height: 46px;
  padding: 0 24px;
  border-radius: 10px;
  font-size: 14px;
  font-weight: 800;
  transition: transform .15s ease, box-shadow .15s ease, background .15s ease;
  line-height: 1;
  white-space: nowrap;
  cursor: pointer;
}
.btn:focus-visible {
  outline: 3px solid var(--color-volt);
  outline-offset: 3px;
}
.btn-volt {
  background: var(--color-volt);
  color: var(--color-ink);
  box-shadow: 0 12px 24px rgba(7, 19, 15, .14);
}
.btn-volt:hover {
  transform: translateY(-2px);
  box-shadow: 0 16px 30px rgba(7, 19, 15, .18);
}
.btn-volt:active, .btn-primary:active {
  transform: scale(.97);
}
.btn-outline-light {
  border: 1px solid rgba(255, 255, 255, .35);
  color: #EDF5F0;
  background: rgba(255,255,255,.03);
}
.btn-outline-light:hover {
  background: rgba(255,255,255,.08);
  border-color: rgba(200, 245, 66, .5);
}
.btn-outline-dark {
  border: 1px solid rgba(11, 23, 19, .4);
  color: var(--color-ink);
}
.btn-outline-dark:hover {
  background: rgba(200, 245, 66, .08);
  border-color: var(--color-ink);
}
.cat-hero {
  position: relative;
  background: var(--color-paper);
  padding: 150px 0 70px;
  min-height: 560px;
  display: flex;
  align-items: center;
  overflow: hidden;
}
.cat-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background-image:
    radial-gradient(rgba(7,19,15,.12) 1px, transparent 1.6px),
    radial-gradient(rgba(200,245,66,.2) 1px, transparent 1.5px);
  background-size: 26px 26px, 38px 38px;
  background-position: 0 0, 11px 12px;
  mask-image: linear-gradient(110deg, rgba(0,0,0,.7), transparent 48%);
}
.cat-hero-inner {
  position: relative;
  z-index: 2;
  display: grid;
  grid-template-columns: minmax(0, 6fr) minmax(0, 5fr);
  align-items: center;
  gap: 66px;
}
.cat-hero-copy {
  padding: 20px 0 36px;
}
.crumbs {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 6px;
  color: var(--color-muted);
  font-size: 13px;
  margin-bottom: 22px;
  font-weight: 500;
}
.crumbs a {
  opacity: .8;
}
.crumbs a:hover {
  color: var(--color-ink);
  opacity: 1;
}
.crumbs-item {
  font-size: 13px;
}
.hero-badge {
  width: fit-content;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: var(--color-card);
  border: 1px solid rgba(11,23,19,.1);
  border-radius: 999px;
  color: var(--color-ink);
  font-size: 13px;
  font-weight: 700;
  padding: 8px 16px;
  margin-bottom: 20px;
  box-shadow: rgba(7,19,15,.04) 0 8px 20px;
}
.hero-badge .dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--color-volt);
  box-shadow: 0 0 0 3px rgba(200,245,66,.4);
}
.cat-hero h1 {
  font-size: clamp(34px, 5.2vw, 58px);
  font-weight: 900;
  line-height: 1.2;
  letter-spacing: -.02em;
  color: var(--color-ink);
  margin: 0 0 18px;
}
.cat-hero h1 .brand-hl {
  background: linear-gradient(180deg, transparent 40%, rgba(200,245,66,.55) 40%);
  padding: 0 3px;
}
.cat-hero-sub {
  color: var(--color-muted);
  font-size: 16px;
  max-width: 580px;
  line-height: 1.9;
  margin-bottom: 8px;
}
.cat-hero-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 26px;
  margin-bottom: 26px;
}
.chip {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 7px 13px;
  border-radius: 999px;
  background: rgba(255,255,255,.8);
  border: 1px solid var(--color-line);
  font-size: 13px;
  font-weight: 600;
  color: var(--color-ink);
}
.chip .icon-dot {
  width: 6px;
  height: 6px;
  border-radius: 100%;
  background: var(--color-teal);
}
.cat-hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 30px;
}
.cat-hero-figure {
  position: relative;
}
.hero-visual {
  border-radius: var(--radius-img);
  border: 1px solid rgba(7,19,15,.1);
  box-shadow: var(--shadow-hover);
  overflow: hidden;
  background: var(--color-card);
  position: relative;
}
.hero-visual .cover-case {
  position: absolute;
  inset: 0;
  border-radius: inherit;
  overflow: hidden;
}
.hero-visual img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  aspect-ratio: 4 / 4.8;
}
.visual-mask {
  position: absolute;
  inset: 0;
  background: linear-gradient(150deg, rgba(200,245,66,.08) 0%, transparent 38%);
}
.visual-caption {
  position: absolute;
  left: 16px;
  right: 16px;
  bottom: 16px;
  background: rgba(7,19,15,.78);
  color: #fff;
  padding: 14px 16px;
  border-radius: 16px;
  display: flex;
  flex-direction: column;
  gap: 8px;
  border: 1px solid rgba(255,255,255,.08);
}
.visual-caption h3 {
  font-size: 15px;
  font-weight: 800;
  margin-bottom: 4px;
}
.visual-caption p {
  font-size: 13px;
  color: #C7D9D1;
}
.air {
  position: relative;
}
.air::before {
  content: "";
  position: absolute;
  left: 18px;
  right: 18px;
  top: -8px;
  height: 2px;
  background: rgba(200, 245, 66, .65);
  border-radius: 4px;
}
.split-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(420px, 1.25fr);
  gap: 60px;
  align-items: center;
}
.split-sticky .sticker-title {
  font-size: 14px;
  font-weight: 700;
  margin-bottom: 20px;
  display: inline-flex;
  padding: 6px 14px;
  border-radius: 999px;
  background: rgba(200,245,66,.18);
  width: fit-content;
}
.split-layout .split-photo {
  border-radius: var(--radius-img);
  overflow: hidden;
  background: var(--color-card);
  border: 1px solid var(--color-line);
  box-shadow: var(--shadow-card);
}
.split-layout .split-photo img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  aspect-ratio: 4 / 4.4;
}
.split-copy h2 {
  font-size: clamp(25px, 3vw, 34px);
  font-weight: 900;
  line-height: 1.38;
  margin-bottom: 24px;
}
.split-copy p {
  color: var(--color-muted);
  margin-bottom: 20px;
}
.ticks {
  list-style: none;
  margin-top: 24px;
  display: flex;
  flex-direction: column;
  gap: 14px;
}
.ticks li {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  color: var(--color-ink);
  font-weight: 600;
  padding-left: 0;
  line-height: 1.7;
}
.ticks li::before {
  content: "";
  flex: none;
  width: 10px;
  height: 10px;
  border-radius: 3px;
  background: var(--color-volt);
  margin-top: 10px;
  box-shadow: 0 0 0 3px rgba(200,245,66,.24);
}
.compare-wrap {
  display: flex;
  flex-direction: column;
  gap: 58px;
}
.compare-pair {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 44px minmax(0, 1fr);
  align-items: stretch;
  gap: 20px;
}
.pair-connector {
  display: flex;
  align-items: center;
  justify-content: center;
}
.pair-connector svg {
  color: var(--color-teal);
}
.compare-card {
  background: var(--color-card);
  border-radius: 16px;
  border: 1px solid var(--color-line);
  padding: 34px 32px;
  box-shadow: var(--shadow-card);
  position: relative;
  transition: box-shadow .2s ease, transform .2s ease;
}
.compare-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-hover);
}
.compare-card.dark {
  background: var(--color-panel);
  border-color: rgba(255,255,255,.1);
  color: #fff;
}
.compare-card.dark .compare-card-title,
.compare-card.dark p {
  color: #fff;
}
.compare-card.dark p {
  color: #A9C4B6;
}
.compare-card-index {
  width: 38px;
  height: 38px;
  background: var(--color-volt);
  color: var(--color-ink);
  border-radius: 10px;
  display: grid;
  place-items: center;
  font-size: 14px;
  font-weight: 900;
  margin-bottom: 18px;
}
.compare-card-title {
  font-size: 20px;
  font-weight: 800;
  margin-bottom: 14px;
}
.compare-card p {
  color: var(--color-muted);
  font-size: 15px;
  margin-bottom: 18px;
}
.compare-card ul {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 8px;
  font-size: 14px;
  font-weight: 600;
}
.compare-card ul li {
  position: relative;
  padding-left: 18px;
}
.compare-card ul li::before {
  content: "";
  width: 6px;
  height: 6px;
  border-radius: 1px;
  background: var(--color-teal);
  position: absolute;
  left: 0;
  top: 10px;
}
.discover-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.2fr) minmax(0, 1fr) minmax(0, 1fr);
  gap: 20px;
}
.discover-card {
  background: var(--color-card);
  border-radius: 18px;
  border: 1px solid var(--color-line);
  overflow: hidden;
  box-shadow: var(--shadow-card);
  display: flex;
  flex-direction: column;
  transition: transform .2s, box-shadow .2s;
}
.discover-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-hover);
}
.discover-card:first-child {
  background: #10251D;
  border-color: rgba(255,255,255,.08);
  color: #fff;
}
.discover-card:first-child .discover-card-title {
  color: #fff;
}
.discover-card:first-child .discover-card-excerpt {
  color: #A9C6B9;
}
.discover-card .card-image {
  overflow: hidden;
  height: 200px;
}
.discover-card:first-child .card-image {
  height: 225px;
}
.discover-card .card-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  aspect-ratio: 16 / 9;
  transition: transform .4s ease;
}
.discover-card:hover .card-image img {
  transform: scale(1.05);
}
.discover-body {
  padding: 24px;
  display: flex;
  flex: 1;
  flex-direction: column;
}
.discover-card-title {
  font-size: 19px;
  font-weight: 800;
  margin-bottom: 10px;
}
.discover-card-excerpt {
  font-size: 14px;
  color: var(--color-muted);
  margin-bottom: 18px;
  line-height: 1.8;
}
.discover-card-meta {
  margin-top: auto;
  display: flex;
  align-items: center;
  gap: 10px;
  padding-top: 14px;
  border-top: 1px solid rgba(7,19,15,.08);
}
.discover-card:first-child .discover-card-meta {
  border-top: 1px solid rgba(255,255,255,.1);
}
.discover-card-meta a {
  color: var(--color-ink);
  font-weight: 700;
  font-size: 14px;
}
.discover-card:first-child .discover-card-meta a {
  color: var(--color-volt);
}
.dark-zone {
  background: var(--color-abyss);
  color: #fff;
}
.dark-zone .section-head h2,
.dark-zone .section-head h3 {
  color: #fff;
}
.dark-zone .section-head p {
  color: #A9C6B9;
}
.dark-zone .pre-tag {
  background: var(--color-volt-dim);
  border-color: rgba(200,245,66,.28);
  color: var(--color-volt);
}
.zone-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  gap: 24px;
}
.zone-card {
  background: rgba(255,255,255,.04);
  border: 1px solid rgba(255,255,255,.13);
  border-radius: 18px;
  padding: 34px 30px;
  position: relative;
}
.zone-card:nth-child(2) {
  background: rgba(200,245,66,.1);
  border-color: rgba(200,245,66,.25);
}
.zone-icon {
  width: 44px;
  height: 44px;
  background: var(--color-volt);
  border-radius: 12px;
  display: grid;
  place-items: center;
  color: var(--color-ink);
  margin-bottom: 20px;
}
.zone-card h3 {
  color: #fff;
  font-size: 20px;
  font-weight: 800;
  margin-bottom: 10px;
}
.zone-card p {
  color: #B9CFC5;
  font-size: 14px;
  line-height: 1.85;
  margin-bottom: 16px;
}
.zone-link {
  color: var(--color-volt);
  font-weight: 700;
  font-size: 14px;
  display: inline-flex;
  align-items: center;
  gap: 5px;
}
.dark-cta {
  position: relative;
  background: var(--color-abyss);
  background-image: radial-gradient(circle at 30% 20%, rgba(200,245,66,.12) 0, transparent 34%);
  padding: 86px 0;
  text-align: center;
  color: #fff;
}
.dark-cta .cta-inner {
  max-width: 760px;
  margin: 0 auto;
}
.dark-cta h2 {
  font-size: clamp(27px, 3.6vw, 42px);
  font-weight: 900;
  line-height: 1.35;
  color: #fff;
}
.dark-cta h2 span {
  color: var(--color-volt);
}
.dark-cta p {
  color: #A9C4B6;
  font-size: 16px;
  margin-top: 18px;
  margin-bottom: 32px;
}
.dark-cta .cta-actions {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 14px;
}
.faq-area {
  background: #FFFFFF;
}
.faq-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1.6fr);
  gap: 20px 70px;
  align-items: start;
}
.faq-intro .sticker {
  color: var(--color-muted);
  font-weight: 600;
  margin-top: 12px;
}
.faq-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
}
.faq-item {
  background: var(--color-card);
  border: 1px solid var(--color-line);
  border-radius: 14px;
  overflow: hidden;
  transition: border-color .15s, box-shadow .15s;
  border-left: 2px solid transparent;
}
.faq-item[open] {
  border-left: 2px solid var(--color-volt);
  box-shadow: var(--shadow-card);
}
.faq-item summary {
  cursor: pointer;
  list-style: none;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 15px;
  padding: 18px 22px;
  min-height: 64px;
  font-size: 15px;
  font-weight: 700;
  line-height: 1.5;
  color: var(--color-ink);
}
.faq-item summary::-webkit-details-marker {
  display: none;
}
.faq-icon {
  flex: none;
  width: 30px;
  height: 30px;
  border-radius: 8px;
  display: grid;
  place-items: center;
  color: var(--color-ink);
  background: var(--color-paper);
  border: 1px solid var(--color-line);
  transition: transform .2s ease, background .2s ease;
}
.faq-item[open] .faq-icon {
  transform: rotate(45deg);
  background: var(--color-volt-dim);
}
.faq-answer {
  padding: 0 22px 20px;
  color: var(--color-muted);
  font-size: 14px;
  line-height: 1.9;
  max-width: 92%;
}
.faq-answer a {
  color: var(--color-ink);
  font-weight: 700;
  text-decoration: underline;
  text-decoration-color: var(--color-volt);
  text-underline-offset: 4px;
}
.bgc-paper {
  background: var(--color-paper);
}
.site-footer {
  background: var(--color-abyss);
  color: #AFC7BB;
  padding: 76px 0 32px;
}
.footer-top {
  display: grid;
  grid-template-columns: minmax(0, 1.5fr) minmax(0, 1fr);
  gap: 60px;
  margin-bottom: 48px;
}
.footer-brand .brand {
  font-size: 18px;
  margin-bottom: 16px;
}
.footer-brand p {
  margin-top: 16px;
  line-height: 2;
  color: #94AEA1;
  font-size: 14px;
  max-width: 400px;
}
.footer-links {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
}
.footer-links h4 {
  color: #fff;
  font-size: 15px;
  font-weight: 700;
  margin-bottom: 14px;
}
.footer-links ul {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.footer-links a {
  font-size: 14px;
  color: #9EB2AA;
  transition: color .15s, padding-left .15s;
}
.footer-links a:hover {
  color: var(--color-volt);
  padding-left: 5px;
}
.footer-mid {
  padding: 28px 0;
  border-top: 1px solid rgba(255,255,255,.1);
  border-bottom: 1px solid rgba(255,255,255,.1);
  margin-bottom: 30px;
}
.footer-mid ul {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 12px 26px;
}
.footer-mid a {
  color: #81978C;
  font-size: 13px;
  font-weight: 500;
}
.footer-mid a:hover {
  color: var(--color-volt);
}
.footer-bottom {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  align-items: center;
  justify-content: space-between;
  font-size: 13px;
  color: #6A8679;
}
.footer-bottom a {
  color: inherit;
}
.hr-line {
  border: 0;
  height: 1px;
  width: 120px;
  background: var(--color-volt);
  margin: 0 0 24px;
}
.xsplit-pattern {
  position: relative;
  background-color: var(--color-card);
  background-image:
    linear-gradient(rgba(7,19,15,.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(7,19,15,.05) 1px, transparent 1px);
  background-size: 40px 40px;
  opacity: .7;
  border-radius: 18px;
}
.img-soft-mask {
  position: relative;
  overflow: hidden;
  border-radius: var(--radius-img);
}
.img-soft-mask::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(120deg, rgba(7,19,15,.2), transparent 40%);
  pointer-events: none;
}
@media (max-width: 1024px) {
  .main-nav {
    gap: 24px;
  }
  .header-inner {
    gap: 22px;
  }
  .cat-hero-inner {
    grid-template-columns: 1fr;
  }
  .cat-hero {
    padding-top: 130px;
  }
  .hero-visual {
    display: none;
  }
  .split-layout {
    grid-template-columns: 1fr;
    gap: 30px;
  }
  .split-photo {
    max-width: 640px;
  }
  .discover-grid {
    grid-template-columns: 1fr 1fr;
  }
}
@media (max-width: 880px) {
  .desktop-nav-link, .main-nav {
    display: none;
  }
  .header-cta-desktop {
    display: none;
  }
  .menu-btn {
    display: block;
    margin-left: auto;
  }
  .header-inner {
    justify-content: flex-start;
  }
  .footer-top {
    grid-template-columns: 1fr;
    gap: 34px;
  }
  .faq-layout {
    grid-template-columns: 1fr;
  }
}
@media (max-width: 640px) {
  .compare-pair {
    display: flex;
    flex-direction: column;
  }
  .pair-connector {
    display: none;
  }
  .compare-card {
    width: 100%;
  }
  .discover-grid {
    grid-template-columns: 1fr;
  }
  .zone-grid {
    grid-template-columns: 1fr;
  }
  .footer-links {
    grid-template-columns: 1fr;
    gap: 30px;
  }
  .cat-hero-actions {
    flex-direction: column;
    align-items: stretch;
  }
  .cat-hero-actions .btn {
    width: 100%;
  }
  .cat-hero-tags {
    gap: 8px;
  }
  .cat-hero h1 {
    font-size: 34px;
  }
  .dark-cta {
    padding: 64px 0;
  }
  .footer-bottom {
    flex-direction: column;
    text-align: center;
  }
}

/* roulang page: category2 */
:root {
    --color-ink: #0B1713;
    --color-abyss: #07130F;
    --color-panel: #10251D;
    --color-volt: #C8F542;
    --color-teal: #2DD4BF;
    --color-sun: #F4B942;
    --color-paper: #F3F6F2;
    --color-card: #FFFFFF;
    --color-line: #D9E2DA;
    --color-muted: #5B6B62;
    --color-white: #FFFFFF;
    --radius-card: 12px;
    --radius-big: 16px;
    --shadow-soft: 0 10px 30px rgba(7, 19, 15, .06);
    --shadow-hover: 0 18px 40px rgba(7, 19, 15, .12);
  }

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

  html {
    scroll-behavior: smooth;
  }

  body {
    font-family: ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
    background: var(--color-paper);
    color: var(--color-ink);
    line-height: 1.8;
    margin: 0;
    -webkit-font-smoothing: antialiased;
  }

  img {
    max-width: 100%;
    display: block;
    object-fit: cover;
  }

  a {
    text-decoration: none;
    color: inherit;
    transition: color .22s ease;
  }

  .container {
    width: 100%;
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 24px;
  }

  /* header */
  .site-header {
    position: fixed;
    top: 0;
    left: 0;
    z-index: 60;
    width: 100%;
    background: rgba(7, 19, 15, .92);
    -webkit-backdrop-filter: blur(14px);
    backdrop-filter: blur(14px);
    border-bottom: 1px solid rgba(201, 245, 66, .10);
  }

  .site-header::after {
    content: "";
    position: absolute;
    left: 0;
    bottom: -1px;
    width: 100%;
    height: 1px;
    background: linear-gradient(90deg, transparent 0%, rgba(200, 245, 66, .38) 30%, rgba(45, 212, 191, .20) 70%, transparent 100%);
    pointer-events: none;
  }

  .header-inner {
    max-width: 1280px;
    margin: 0 auto;
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 76px;
    padding: 0 24px;
  }

  .brand {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    font-size: 18px;
    font-weight: 800;
    color: var(--color-white);
    letter-spacing: .02em;
    white-space: nowrap;
  }

  .brand-mark {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 34px;
    height: 34px;
    flex: 0 0 34px;
    border-radius: 10px;
    background: var(--color-volt);
    color: #081409;
    font-weight: 900;
    font-size: 18px;
    transform: rotate(-6deg);
    transition: transform .22s ease;
  }

  .brand:hover .brand-mark {
    transform: rotate(4deg);
  }

  .main-nav {
    display: flex;
    align-items: center;
    gap: 34px;
    margin-left: 24px;
  }

  .main-nav .nav-link {
    display: inline-flex;
    align-items: center;
    min-height: 44px;
    color: rgba(255, 255, 255, .82);
    font-size: 15px;
    font-weight: 600;
    position: relative;
    border: 0;
    background: transparent;
    cursor: pointer;
  }

  .main-nav .nav-link::after {
    content: "";
    position: absolute;
    left: 0;
    bottom: -3px;
    width: 100%;
    height: 2px;
    background: var(--color-volt);
    border-radius: 999px;
    transform: scaleX(0);
    transform-origin: center;
    transition: transform .22s ease;
  }

  .main-nav .nav-link:hover {
    color: var(--color-volt);
  }

  .main-nav .nav-link:hover::after,
  .main-nav .nav-link.active::after {
    transform: scaleX(1);
  }

  .main-nav .nav-link.active {
    color: var(--color-volt);
  }

  .header-cta {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 44px;
    padding: 0 22px;
    border-radius: 10px;
    font-size: 14px;
    font-weight: 800;
    background: var(--color-volt);
    color: #0B1B10;
    margin-left: 18px;
    border: 0;
    cursor: pointer;
    transition: transform .22s ease, box-shadow .25s ease, background .22s ease;
    box-shadow: 0 6px 18px rgba(200, 245, 66, .20);
  }

  .header-cta:hover {
    background: #d4ff5e;
    transform: translateY(-2px);
    box-shadow: 0 10px 24px rgba(200, 245, 66, .24);
  }

  .header-cta:active {
    transform: scale(.98);
  }

  .menu-btn {
    display: none;
    width: 44px;
    height: 44px;
    align-items: center;
    justify-content: center;
    margin-left: 8px;
    box-shadow: none;
    color: #fff;
    background: transparent;
    border: 1px solid rgba(255, 255, 255, .20);
    border-radius: 10px;
    cursor: pointer;
    transition: background .2s ease, border-color .2s ease;
  }

  .menu-btn:hover {
    border-color: var(--color-volt);
    background: rgba(200, 245, 66, .10);
  }

  .menu-btn:focus-visible,
  .header-cta:focus-visible,
  .btn:focus-visible,
  .jump-link:focus-visible,
  .nav-link:focus-visible,
  .brand:focus-visible {
    outline: 3px solid var(--color-teal);
    outline-offset: 3px;
  }

  .mobile-drawer {
    display: none;
  }

  /* footer */
  .site-footer {
    background: var(--color-abyss);
    color: #b8cfc2;
    padding: 68px 0 26px;
    margin-top: 0;
  }

  .footer-top {
    display: grid;
    grid-template-columns: 1.4fr 1fr;
    gap: 48px;
    padding-bottom: 32px;
    border-bottom: 1px solid rgba(255, 255, 255, .10);
  }

  .footer-brand .brand {
    font-size: 20px;
    color: #fff;
  }

  .footer-brand p {
    max-width: 420px;
    margin: 18px 0 0;
    color: #94AF9F;
    font-size: 14px;
    line-height: 1.9;
  }

  .footer-links {
    display: flex;
    gap: 44px;
  }

  .footer-links h4 {
    margin: 0 0 12px;
    color: var(--color-volt);
    font-size: 14px;
    font-weight: 700;
    letter-spacing: .04em;
  }

  .footer-links ul {
    list-style: none;
    margin: 0;
    padding: 0;
  }

  .footer-links li + li {
    margin-top: 6px;
  }

  .footer-links a {
    color: #b8cfc2;
    font-size: 14px;
    display: inline-flex;
    align-items: center;
    min-height: 28px;
  }

  .footer-links a:hover {
    color: var(--color-volt);
  }

  .footer-mid {
    margin-top: 24px;
    padding-bottom: 12px;
  }

  .footer-mid ul {
    list-style: none;
    margin: 0;
    padding: 0;
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
  }

  .footer-mid li a {
    display: inline-flex;
    padding: 4px 14px;
    border: 1px solid rgba(255, 255, 255, .14);
    border-radius: 999px;
    font-size: 13px;
    color: #a9c4b6;
    transition: all .2s ease;
  }

  .footer-mid li a:hover {
    color: #0b1a12;
    background: var(--color-volt);
    border-color: var(--color-volt);
  }

  .footer-bottom {
    display: flex;
    flex-wrap: wrap;
    justify-content: space-between;
    gap: 10px 20px;
    margin-top: 24px;
    padding-top: 20px;
    border-top: 1px solid rgba(255, 255, 255, .08);
    color: #789287;
    font-size: 13px;
  }

  /* banner */
  .page-banner {
    position: relative;
    padding: 158px 0 96px;
    background: radial-gradient(circle at 18% 22%, rgba(200, 245, 66, .13), transparent 28%),
      radial-gradient(circle at 86% 16%, rgba(45, 212, 191, .14), transparent 30%),
      linear-gradient(135deg, #07130F 0%, #0C2017 44%, #10251D 100%);
    color: #fff;
    overflow: hidden;
    scroll-margin-top: 76px;
  }

  .page-banner::before {
    content: "";
    position: absolute;
    inset: 0;
    background-image: radial-gradient(rgba(200, 245, 66, .32) 1px, transparent 1px);
    background-size: 24px 24px;
    mask-image: linear-gradient(135deg, transparent 30%, #000 78%, transparent 100%);
    -webkit-mask-image: linear-gradient(135deg, transparent 30%, #000 78%, transparent 100%);
    pointer-events: none;
  }

  .banner-inner {
    position: relative;
    display: grid;
    grid-template-columns: minmax(0, 1.25fr) minmax(0, .75fr);
    align-items: center;
    gap: 52px;
  }

  .page-banner .badge {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    border: 1px solid rgba(200, 245, 66, .55);
    background: rgba(200, 245, 66, .12);
    color: var(--color-volt);
    font-size: 13px;
    padding: 7px 14px;
    border-radius: 999px;
    font-weight: 600;
    margin-bottom: 26px;
  }

  .badge-dot {
    width: 7px;
    height: 7px;
    background: var(--color-volt);
    border-radius: 50%;
  }

  .page-banner h1 {
    font-size: 50px;
    line-height: 1.18;
    margin: 0 0 22px;
    font-weight: 900;
    letter-spacing: -.01em;
    max-width: 760px;
  }

  .page-banner h1 .volt-text {
    color: var(--color-volt);
  }

  .page-banner p.lead {
    color: #A9C4B6;
    font-size: 17px;
    max-width: 660px;
    margin: 18px 0 30px;
    line-height: 1.9;
  }

  .banner-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 14px;
    align-items: center;
  }

  .btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border-radius: 10px;
    font-size: 15px;
    font-weight: 700;
    line-height: 1.3;
    padding: 0 24px;
    min-height: 46px;
    border: 0;
    cursor: pointer;
    transition: transform .22s ease, box-shadow .25s ease, background .22s ease, border-color .22s ease;
  }

  .btn-primary {
    background: var(--color-volt);
    color: #0B1713;
    box-shadow: 0 8px 20px rgba(200, 245, 66, .18);
  }

  .btn-primary:hover {
    background: #d7ff6c;
    transform: translateY(-3px);
    box-shadow: 0 14px 28px rgba(200, 245, 66, .25);
  }

  .btn-primary:active {
    transform: scale(.98);
  }

  .btn-ghost-light {
    background: rgba(255, 255, 255, .04);
    color: #eaf7ef;
    border: 1px solid rgba(255, 255, 255, .32);
  }

  .btn-ghost-light:hover {
    background: rgba(255, 255, 255, .10);
    border-color: rgba(200, 245, 66, .55);
    color: var(--color-volt);
    transform: translateY(-2px);
  }

  .btn-outline-dark {
    background: transparent;
    color: var(--color-ink);
    border: 1px solid rgba(11, 23, 19, .48);
    box-shadow: none;
  }

  .btn-outline-dark:hover {
    background: rgba(200, 245, 66, .12);
    border-color: var(--color-abyss);
    transform: translateY(-2px);
  }

  .banner-img {
    position: relative;
    border-radius: 20px;
    overflow: hidden;
    border: 1px solid rgba(255, 255, 255, .18);
    box-shadow: 0 24px 70px rgba(0, 0, 0, .36);
    aspect-ratio: 4 / 3;
    background: #0B1713;
  }

  .banner-img img {
    width: 100%;
    height: 100%;
    object-fit: cover;
  }

  .banner-img-fallback {
    position: absolute;
    inset: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    background: radial-gradient(circle at 20% 20%, rgba(200, 245, 66, .32), transparent 34%),
      radial-gradient(circle at 80% 70%, rgba(45, 212, 191, .22), transparent 36%), #0D1F18;
    color: rgba(200, 245, 66, .58);
    font-size: 38px;
    font-weight: 900;
  }

  /* jump anchor */
  .jump-section {
    background: #F9FBF8;
    border-bottom: 1px solid var(--color-line);
    scroll-margin-top: 80px;
  }

  .jump-row {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 12px;
    padding: 24px 0;
  }

  .jump-link {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 52px;
    padding: 0 16px;
    border: 1px solid var(--color-line);
    border-radius: 12px;
    background: #fff;
    box-shadow: 0 4px 12px rgba(7, 19, 15, .03);
    font-size: 15px;
    font-weight: 700;
    color: var(--color-ink);
    gap: 8px;
    transition: all .22s ease;
  }

  .jump-link:hover {
    border-color: var(--color-abyss);
    box-shadow: var(--shadow-hover);
    transform: translateY(-2px);
  }

  .jump-link .jump-num {
    color: var(--color-volt);
    font-size: 13px;
    font-weight: 800;
    background: #10251D;
    border-radius: 6px;
    width: 24px;
    height: 24px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
  }

  /* main modules */
  .module-block {
    scroll-margin-top: 76px;
    padding: 96px 0;
    background: #fff;
  }

  .module-block.paper-bg {
    background: #F5F8F3;
  }

  .module-block.dark-bg {
    background: var(--color-abyss);
    color: #fff;
  }

  .module-grid {
    display: grid;
    grid-template-columns: minmax(0, .95fr) minmax(0, 1.05fr);
    align-items: center;
    gap: 68px;
  }

  .module-grid.reverse {
    direction: rtl;
  }

  .module-grid.reverse > * {
    direction: ltr;
  }

  .module-number {
    font-size: 13px;
    font-weight: 800;
    color: var(--color-abyss);
    background: var(--color-volt);
    display: inline-flex;
    padding: 6px 14px;
    border-radius: 999px;
    margin-bottom: 20px;
    letter-spacing: .03em;
  }

  .dark-bg .module-number {
    background: var(--color-volt);
    color: #081409;
  }

  .module-block h2 {
    font-size: 33px;
    line-height: 1.35;
    font-weight: 900;
    letter-spacing: -.02em;
    margin: 0 0 28px;
    position: relative;
  }

  .dark-bg h2 {
    color: #ffffff;
  }

  .module-block.dark-bg .module-lead {
    color: #A9C4B6;
  }

  .module-lead {
    font-size: 16px;
    margin: 0 0 32px;
    color: #596A61;
  }

  .module-point-list {
    list-style: none;
    margin: 0;
    padding: 0;
  }

  .module-point-list li {
    position: relative;
    padding: 15px 0 15px 30px;
    border-top: 1px solid rgba(11, 23, 19, .10);
    font-size: 15px;
    color: #33443A;
    line-height: 1.85;
  }

  .dark-bg .module-point-list li {
    border-top-color: rgba(255, 255, 255, .10);
    color: #c5dcd0;
  }

  .module-point-list li:first-child {
    border-top: 0;
    padding-top: 0;
  }

  .module-point-list li::before {
    content: "";
    position: absolute;
    left: 0;
    top: 16px;
    width: 8px;
    height: 8px;
    background: var(--color-volt);
    border-radius: 2px;
    transform: translateY(8px);
  }

  .dark-bg .module-point-list li::before {
    background: var(--color-volt);
  }

  .module-point-list strong {
    display: block;
    color: var(--color-ink);
    font-size: 16px;
    margin-bottom: 2px;
    font-weight: 800;
  }

  .dark-bg .module-point-list strong,
  .dark-bg .module-point-list span {
    color: #e6faf0;
  }

  .module-img {
    border-radius: 16px;
    overflow: hidden;
    box-shadow: 0 14px 40px rgba(7, 19, 15, .16);
    position: relative;
    aspect-ratio: 4 / 3;
    background: #E2E9E2;
  }

  .module-block.dark-bg .module-img {
    box-shadow: 0 20px 55px rgba(0, 0, 0, .34);
    border: 1px solid rgba(255, 255, 255, .12);
  }

  .module-img img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform .55s ease;
  }

  .module-img:hover img {
    transform: scale(1.035);
  }

  .module-panel-card {
    background: rgba(200, 245, 66, .08);
    border: 1px solid rgba(200, 245, 66, .16);
    border-radius: 16px;
    padding: 28px;
    margin-top: 26px;
  }

  .module-panel-card h3 {
    color: var(--color-volt);
    font-size: 16px;
    margin: 0 0 6px;
    font-weight: 800;
  }

  .module-panel-card p {
    color: #B3C9BA;
    font-size: 14px;
    line-height: 1.8;
    margin: 0;
  }

  /* module quote card small */
  .module-desc {
    display: flex;
    flex-direction: column;
    gap: 14px;
  }

  .module-desc p {
    font-size: 15.5px;
    line-height: 1.9;
    margin: 0;
    color: #4C5E54;
  }

  .dark-bg .module-desc p {
    color: #A9C4B6;
  }

  /* compare */
  .compare-section {
    background: #fff;
    padding: 104px 0 92px;
  }

  .section-heading {
    display: flex;
    align-items: flex-end;
    justify-content: space-between;
    gap: 32px;
    margin-bottom: 40px;
  }

  .section-heading h2 {
    font-size: 36px;
    line-height: 1.3;
    font-weight: 900;
    margin: 0;
  }

  .section-heading p {
    max-width: 520px;
    margin: 10px 0 0;
    color: var(--color-muted);
    font-size: 15px;
    line-height: 1.85;
  }

  .compare-table-wrap {
    border-radius: 16px;
    border: 1px solid rgba(11, 23, 19, .09);
    overflow-x: auto;
    box-shadow: var(--shadow-soft);
    background: #fff;
  }

  .compare-table {
    width: 100%;
    border-collapse: collapse;
    min-width: 700px;
    font-size: 15px;
  }

  .compare-table th {
    background: #123124;
    color: #dff7d8;
    text-align: left;
    padding: 15px 20px;
    font-size: 14px;
    font-weight: 700;
    white-space: nowrap;
    border: 0;
  }

  .compare-table td {
    padding: 18px 20px;
    border-bottom: 1px solid var(--color-line);
    color: #31473A;
    vertical-align: top;
    line-height: 1.8;
  }

  .compare-table tr:last-child td {
    border-bottom: 0;
  }

  .compare-table td:first-child {
    font-weight: 800;
    color: var(--color-abyss);
    white-space: nowrap;
  }

  .compare-table tr:nth-child(even) td {
    background: #F9FBF8;
  }

  .compare-table .tag-green {
    display: inline-flex;
    padding: 3px 12px;
    background: rgba(200, 245, 66, .20);
    border-radius: 999px;
    color: #1C3B26;
    font-size: 13px;
    font-weight: 700;
  }

  /* faq */
  .faq-section {
    padding: 96px 0 78px;
    background: #F5F8F3;
  }

  .faq-layout {
    display: grid;
    grid-template-columns: minmax(0, .72fr) minmax(0, 1.28fr);
    gap: 64px;
    align-items: start;
  }

  .faq-layout .section-heading {
    display: block;
    margin-bottom: 16px;
  }

  .faq-side-note {
    margin-top: 18px;
    color: var(--color-muted);
    font-size: 14px;
    line-height: 1.9;
    border-left: 3px solid var(--color-volt);
    padding-left: 16px;
  }

  .faq-list {
    display: flex;
    flex-direction: column;
    gap: 12px;
  }

  .faq-item {
    background: #fff;
    border-radius: 12px;
    border: 1px solid var(--color-line);
    transition: box-shadow .25s ease, border-color .25s ease, transform .25s ease;
    overflow: hidden;
  }

  .faq-item:hover {
    border-color: rgba(11, 23, 19, .24);
    box-shadow: var(--shadow-soft);
  }

  .faq-item[open] {
    border-left: 3px solid var(--color-volt);
  }

  .faq-item summary {
    list-style: none;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 18px;
    padding: 20px 22px;
    font-size: 16px;
    font-weight: 800;
    min-height: 60px;
    color: var(--color-ink);
    user-select: none;
    outline: 0;
  }

  .faq-item summary::-webkit-details-marker {
    display: none;
  }

  .faq-icon {
    width: 26px;
    height: 26px;
    border-radius: 9px;
    border: 1px solid rgba(11, 23, 19, .22);
    color: var(--color-abyss);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    transition: all .25s ease;
  }

  .faq-icon svg {
    width: 14px;
    height: 14px;
    stroke: currentColor;
    stroke-width: 2.5;
    transition: transform .2s ease;
  }

  .faq-item[open] .faq-icon {
    background: var(--color-volt);
    border-color: var(--color-volt);
    transform: rotate(45deg);
  }

  .faq-answer {
    padding: 0 22px 22px;
    color: #53665C;
    font-size: 15px;
    line-height: 1.9;
    border-top: 1px solid rgba(11, 23, 19, .06);
    margin-top: 0;
  }

  .faq-answer p {
    margin: 16px 0 0;
  }

  /* cta connect */
  .deep-cta {
    background:
      radial-gradient(circle at 20% 18%, rgba(200, 245, 66, .15), transparent 24%),
      radial-gradient(circle at 84% 80%, rgba(45, 212, 191, .12), transparent 26%),
      var(--color-abyss);
    padding: 94px 0;
    text-align: center;
  }

  .deep-cta-inner {
    max-width: 860px;
    margin: 0 auto;
  }

  .deep-cta h2 {
    color: #fff;
    font-size: 38px;
    line-height: 1.35;
    margin: 0;
    font-weight: 900;
  }

  .deep-cta h2 .highlight {
    color: var(--color-volt);
  }

  .deep-cta p {
    max-width: 640px;
    margin: 20px auto 32px;
    color: #A9C4B6;
    font-size: 16px;
  }

  .deep-cta .cta-button-row {
    display: flex;
    justify-content: center;
    gap: 14px;
    flex-wrap: wrap;
  }

  /* 书页内工具类 */
  .margin-bottom-sm {
    margin-bottom: 32px;
  }

  .link-inline {
    font-weight: 700;
    color: #124E37;
    display: inline-flex;
    align-items: center;
    gap: 6px;
  }

  .link-inline:hover {
    text-decoration: underline;
  }

  .dark-bg .link-inline {
    color: var(--color-volt);
  }

  .link-inline svg {
    width: 14px;
    height: 14px;
  }

  section {
    scroll-margin-top: 76px;
  }

  /* responsive */
  @media (max-width: 1024px) {
    .page-banner h1 {
      font-size: 42px;
    }

    .main-nav {
      gap: 20px;
      margin-left: 12px;
    }

    .header-cta-desktop {
      display: none;
    }

    .main-nav {
      display: none;
    }

    .menu-btn {
      display: inline-flex;
    }

    .mobile-drawer {
      display: flex;
      flex-direction: column;
      position: absolute;
      top: 76px;
      left: 0;
      right: 0;
      background: rgba(5, 15, 10, .98);
      border-bottom: 1px solid rgba(200, 245, 66, .2);
      padding: 30px 24px 36px;
      gap: 8px;
      transform: translateY(-16px);
      visibility: hidden;
      opacity: 0;
      pointer-events: none;
      transition: all .2s ease;
      max-height: calc(100vh - 76px);
      overflow-y: auto;
    }

    .mobile-drawer.open {
      transform: translateY(0);
      visibility: visible;
      opacity: 1;
      pointer-events: auto;
    }

    .mobile-drawer .nav-link {
      display: flex;
      align-items: center;
      min-height: 56px;
      border-bottom: 1px solid rgba(255, 255, 255, .08);
      color: rgba(255, 255, 255, .9);
      font-size: 16px;
      font-weight: 600;
    }

    .mobile-drawer .nav-link.active {
      color: var(--color-volt);
      border-bottom-color: rgba(200, 245, 66, .25);
    }

    .mobile-drawer .nav-link:hover {
      color: var(--color-volt);
    }

    .header-inner {
      padding-right: 16px;
      padding-left: 16px;
    }

    .banner-inner {
      grid-template-columns: 1fr;
      gap: 32px;
    }

    .page-banner {
      padding-top: 140px;
    }

    .banner-img {
      max-width: 560px;
      width: 100%;
    }

    .module-grid {
      gap: 40px;
      grid-template-columns: minmax(0, 1fr);
    }

    .module-grid.reverse {
      direction: ltr;
    }

    .module-img {
      aspect-ratio: 16/10;
    }

    .footer-top {
      grid-template-columns: 1fr;
      gap: 32px;
    }

    .compare-section {
      padding: 84px 0 70px;
    }

    .section-heading {
      flex-direction: column;
      align-items: flex-start;
      gap: 6px;
    }
  }

  @media (max-width: 768px) {
    .page-banner {
      padding: 128px 0 66px;
    }

    .page-banner h1 {
      font-size: 34px;
    }

    .page-banner p.lead {
      font-size: 15.5px;
    }

    .jump-row {
      grid-template-columns: repeat(2, 1fr);
      gap: 10px;
    }

    .jump-link {
      min-height: 48px;
    }

    .module-block {
      padding: 68px 0;
    }

    .module-block h2 {
      font-size: 26px;
    }

    .section-heading h2 {
      font-size: 28px;
    }

    .faq-layout {
      grid-template-columns: 1fr;
      gap: 30px;
    }

    .deep-cta {
      padding: 64px 0;
    }

    .deep-cta h2 {
      font-size: 30px;
    }

    .footer-links {
      gap: 32px;
      flex-wrap: wrap;
    }
  }

  @media (max-width: 520px) {
    .container {
      padding: 0 18px;
    }

    .header-inner {
      padding: 0 14px;
    }

    .brand {
      font-size: 16px;
      gap: 7px;
    }

    .brand-mark {
      width: 30px;
      height: 30px;
      flex-basis: 30px;
    }

    .page-banner h1 {
      font-size: 29px;
      line-height: 1.32;
    }

    .page-banner .badge {
      font-size: 12px;
      padding: 5px 11px;
    }

    .banner-actions {
      flex-direction: column;
      align-items: stretch;
    }

    .banner-actions .btn {
      width: 100%;
    }

    .jump-row {
      grid-template-columns: 1fr 1fr;
      padding: 16px 0;
    }

    .jump-link {
      font-size: 13px;
      min-height: 44px;
      padding: 0 8px;
    }

    .module-grid .module-img {
      aspect-ratio: 4/3;
    }

    .module-block {
      padding: 54px 0;
    }

    .module-block h2 {
      font-size: 23px;
    }

    .module-lead {
      font-size: 15px;
    }

    .faq-layout {
      gap: 30px;
    }

    .compare-table th,
    .compare-table td {
      padding: 13px 14px;
      font-size: 14px;
    }

    .footer-bottom {
      flex-direction: column;
      align-items: flex-start;
    }

    .footer-top {
      gap: 28px;
    }

    .footer-mid {
      display: none;
    }

    .footer-brand p {
      font-size: 15px;
    }
  }

/* roulang page: category3 */
:root {
  --color-ink: #0B1713;
  --color-abyss: #07130F;
  --color-panel: #10251D;
  --color-volt: #C8F542;
  --color-volt-dim: rgba(200, 245, 66, .14);
  --color-teal: #2DD4BF;
  --color-sun: #F4B942;
  --color-paper: #F3F6F2;
  --color-card: #FFFFFF;
  --color-line: #D9E2DA;
  --color-muted: #5B6B62;
  --color-white: #FFFFFF;
  --shadow-card: rgba(7, 19, 15, .06) 0 10px 30px;
  --shadow-hover: rgba(7, 19, 15, .12) 0 18px 40px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: #fff;
  color: var(--color-ink);
  font-family: ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  font-size: 16px;
  line-height: 1.8;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

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

a {
  text-decoration: none;
  color: inherit;
}

button {
  font-family: inherit;
}

.container {
  width: 100%;
  max-width: 1280px;
  margin-left: auto;
  margin-right: auto;
  padding-left: 24px;
  padding-right: 24px;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(7, 19, 15, .92);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid rgba(255, 255, 255, .07);
}

.header-inner {
  max-width: 1280px;
  margin: 0 auto;
  min-height: 72px;
  padding: 0 24px;
  display: flex;
  align-items: center;
  gap: 20px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: #fff;
  font-size: 18px;
  font-weight: 800;
  letter-spacing: .02em;
  white-space: nowrap;
}

.brand-mark {
  width: 40px;
  height: 40px;
  border-radius: 12px;
  background: var(--color-volt);
  color: var(--color-abyss);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 21px;
  font-weight: 900;
  flex-shrink: 0;
}

.main-nav {
  display: flex;
  align-items: center;
  gap: 28px;
  margin-left: auto;
}

.nav-link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 72px;
  color: rgba(255, 255, 255, .68);
  font-size: 15px;
  font-weight: 600;
  transition: color .2s ease;
  white-space: nowrap;
  border-bottom: 2px solid transparent;
}

.nav-link:hover {
  color: #fff;
}

.nav-link.active {
  color: #fff;
  border-bottom-color: var(--color-volt);
}

.header-cta {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  height: 42px;
  padding: 0 18px;
  border-radius: 10px;
  background: var(--color-volt);
  color: var(--color-abyss);
  font-size: 14px;
  font-weight: 800;
  transition: transform .2s ease, box-shadow .2s ease, background .2s ease;
  white-space: nowrap;
}

.header-cta:hover {
  background: #d6f95a;
  box-shadow: 0 10px 24px rgba(200, 245, 66, .22);
  transform: translateY(-1px);
}

.menu-btn {
  display: none;
  align-items: center;
  justify-content: center;
  width: 42px;
  height: 42px;
  border: 1px solid rgba(255, 255, 255, .18);
  border-radius: 10px;
  background: transparent;
  color: #fff;
  cursor: pointer;
  margin-left: auto;
}

.mobile-drawer {
  display: none;
}

.section {
  padding: 100px 0;
}

.bg-paper {
  background: var(--color-paper);
}

.bg-white {
  background: var(--color-card);
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  height: 50px;
  padding: 0 24px;
  border-radius: 10px;
  border: 1px solid transparent;
  font-size: 15px;
  font-weight: 800;
  line-height: 1;
  cursor: pointer;
  transition: transform .2s ease, box-shadow .2s ease, background .2s ease, border-color .2s ease, color .2s ease;
}

.btn:focus-visible {
  outline: 3px solid var(--color-teal);
  outline-offset: 3px;
}

.btn-primary {
  background: var(--color-volt);
  color: var(--color-abyss);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 14px 30px rgba(200, 245, 66, .24);
}

.btn-outline-light {
  border-color: rgba(255, 255, 255, .34);
  color: #fff;
  background: transparent;
}

.btn-outline-light:hover {
  background: rgba(255, 255, 255, .08);
  transform: translateY(-2px);
}

.btn-outline-dark {
  border-color: rgba(7, 19, 15, .28);
  color: var(--color-ink);
  background: transparent;
}

.btn-outline-dark:hover {
  background: rgba(200, 245, 66, .12);
  transform: translateY(-2px);
}

.btn:active {
  transform: scale(.98);
}

.hero {
  position: relative;
  background-color: var(--color-abyss);
  color: #fff;
  overflow: hidden;
}

.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image: url("/assets/images/backpic/back-1.webp");
  background-size: cover;
  background-position: center;
  opacity: .3;
}

.hero::after {
  content: "";
  position: absolute;
  inset: 0;
  background-image: radial-gradient(rgba(200, 245, 66, .18) 1px, transparent 1.5px);
  background-size: 28px 28px;
  opacity: .26;
}

.hero-inner {
  position: relative;
  z-index: 2;
  display: grid;
  grid-template-columns: 1fr;
  gap: 48px;
  padding-top: 84px;
  padding-bottom: 84px;
  align-items: center;
}

.hero-kicker {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 14px;
  border-radius: 999px;
  border: 1px solid rgba(255, 255, 255, .24);
  background: rgba(255, 255, 255, .06);
  color: rgba(255, 255, 255, .88);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: .06em;
}

.hero-kicker-dot {
  width: 8px;
  height: 8px;
  border-radius: 999px;
  background: var(--color-volt);
}

.hero h1 {
  margin: 24px 0 0;
  font-size: 44px;
  line-height: 1.22;
  font-weight: 900;
  letter-spacing: -.02em;
}

.hero-copy {
  margin-top: 18px;
  font-size: 17px;
  line-height: 1.95;
  color: #A9C4B6;
  max-width: 640px;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 34px;
}

.hero-visual {
  position: relative;
}

.hero-figure {
  margin: 0;
  border-radius: 20px;
  border: 1px solid rgba(255, 255, 255, .14);
  background: var(--color-panel);
  overflow: hidden;
  box-shadow: 0 24px 60px rgba(0, 0, 0, .34);
}

.hero-image-wrap {
  aspect-ratio: 4 / 3;
  background: #162b23;
}

.hero-image-wrap img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.hero-figcaption {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 14px 18px;
  border-top: 1px solid rgba(255, 255, 255, .08);
  color: #A9C6B9;
  font-size: 14px;
}

.caption-line {
  width: 6px;
  height: 22px;
  border-radius: 999px;
  background: var(--color-volt);
}

.caption-meta {
  margin-left: auto;
  color: rgba(255, 255, 255, .42);
  font-size: 13px;
}

.index-strip {
  border-bottom: 1px solid var(--color-line);
  background: #fff;
}

.index-inner {
  display: flex;
  gap: 12px;
  align-items: center;
  overflow-x: auto;
  padding: 18px 24px;
  max-width: 1280px;
  margin: 0 auto;
}

.index-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 16px;
  border-radius: 999px;
  background: var(--color-paper);
  border: 1px solid var(--color-line);
  color: var(--color-ink);
  font-size: 14px;
  font-weight: 700;
  white-space: nowrap;
  transition: background .2s ease, border-color .2s ease, transform .2s ease;
}

.index-link:hover {
  background: var(--color-volt-dim);
  border-color: rgba(200, 245, 66, .55);
  transform: translateY(-1px);
}

.index-link i {
  color: var(--color-teal);
  font-style: normal;
}

.section-head {
  display: flex;
  align-items: flex-start;
  gap: 20px;
  margin-bottom: 48px;
}

.sec-no {
  font-size: 38px;
  line-height: 1;
  font-weight: 900;
  color: var(--color-volt);
  letter-spacing: -.04em;
  flex-shrink: 0;
}

.section-head-dark .sec-no {
  color: var(--color-volt);
}

.sec-label {
  font-size: 14px;
  font-weight: 700;
  color: var(--color-teal);
  text-transform: uppercase;
  letter-spacing: .08em;
}

.section h2 {
  margin: 8px 0 0;
  font-size: 30px;
  line-height: 1.35;
  font-weight: 900;
  letter-spacing: -.01em;
}

.section-title-line {
  margin-top: 14px;
  height: 4px;
  width: 56px;
  border-radius: 999px;
  background: var(--color-volt);
}

.lead-copy {
  font-size: 17px;
  line-height: 2;
  color: var(--color-muted);
}

.topic-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 24px;
}

.topic-block {
  border: 1px solid var(--color-line);
  background: #fff;
  border-radius: 16px;
  padding: 28px;
  transition: box-shadow .25s ease, transform .25s ease;
}

.topic-block:hover {
  box-shadow: var(--shadow-hover);
  transform: translateY(-3px);
}

.topic-tag {
  display: inline-flex;
  align-items: center;
  padding: 4px 12px;
  border-radius: 999px;
  background: var(--color-volt-dim);
  color: #183120;
  font-size: 13px;
  font-weight: 800;
}

.topic-block h3 {
  margin: 14px 0 8px;
  font-size: 20px;
  line-height: 1.5;
  font-weight: 800;
}

.topic-block p {
  margin: 0;
  color: var(--color-muted);
  font-size: 15px;
  line-height: 1.9;
}

.topic-points {
  list-style: none;
  padding: 16px 0 0;
  margin: 18px 0 0;
  border-top: 1px solid var(--color-line);
  display: grid;
  gap: 8px;
}

.topic-points li {
  position: relative;
  padding-left: 18px;
  color: var(--color-ink);
  font-size: 14px;
  line-height: 1.8;
}

.topic-points li::before {
  content: "";
  position: absolute;
  left: 0;
  top: .75em;
  width: 7px;
  height: 7px;
  background: var(--color-volt);
  border-radius: 2px;
}

.section-dark {
  background: var(--color-abyss);
  color: #fff;
}

.section-dark .lead-copy {
  color: #A9C4B6;
}

.process-row {
  display: grid;
  grid-template-columns: 1fr;
  gap: 24px;
  margin-top: 48px;
  position: relative;
}

.process-step {
  background: var(--color-panel);
  border: 1px solid rgba(255, 255, 255, .08);
  border-radius: 18px;
  padding: 30px 26px;
  min-height: 200px;
  position: relative;
  overflow: hidden;
}

.process-step::after {
  content: "";
  position: absolute;
  width: 100px;
  height: 100px;
  right: -30px;
  top: -30px;
  border-radius: 50%;
  background: rgba(200, 245, 66, .06);
}

.step-num {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 46px;
  height: 46px;
  border-radius: 50%;
  background: var(--color-volt);
  color: var(--color-abyss);
  font-size: 20px;
  font-weight: 900;
  margin-bottom: 18px;
  position: relative;
  z-index: 2;
}

.process-step h3 {
  margin: 0 0 10px;
  font-size: 20px;
  font-weight: 800;
  color: #fff;
}

.process-step p {
  margin: 0;
  color: #A9C4B6;
  font-size: 15px;
  line-height: 1.9;
}

.process-note {
  margin-top: 32px;
  padding: 18px 22px;
  border-left: 3px solid var(--color-volt);
  background: rgba(200, 245, 66, .1);
  color: rgba(255, 255, 255, .82);
  font-size: 14px;
  line-height: 1.9;
  border-radius: 0 14px 14px 0;
}

.help-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 32px;
}

.help-intro {
  position: relative;
}

.help-intro h3 {
  font-size: 24px;
  line-height: 1.5;
  margin: 16px 0 0;
  font-weight: 900;
}

.help-intro p {
  color: var(--color-muted);
  margin-top: 16px;
}

.help-intro-image {
  margin-top: 24px;
  border-radius: 16px;
  overflow: hidden;
  border: 1px solid var(--color-line);
  aspect-ratio: 16 / 10;
  background: #e9efe8;
}

.help-intro-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.help-list {
  display: grid;
  gap: 0;
}

.help-entry {
  display: grid;
  grid-template-columns: 1fr;
  gap: 8px;
  padding: 28px 0;
  border-bottom: 1px solid var(--color-line);
}

.help-q {
  display: flex;
  gap: 14px;
  align-items: flex-start;
}

.help-q-index {
  font-size: 13px;
  font-weight: 900;
  color: var(--color-volt);
  background: rgba(200, 245, 66, .13);
  width: 32px;
  height: 32px;
  border-radius: 10px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  margin-top: 2px;
}

.help-q h4 {
  margin: 0;
  font-size: 18px;
  line-height: 1.6;
  font-weight: 800;
}

.help-a {
  color: var(--color-muted);
  font-size: 15px;
  line-height: 1.9;
  padding-left: 46px;
}

.feedback-section {
  background: var(--color-card);
}

.feedback-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 40px;
  border-radius: 24px;
  background: var(--color-abyss);
  color: #fff;
  padding: 40px 28px;
  overflow: hidden;
  position: relative;
}

.feedback-grid::before {
  content: "";
  position: absolute;
  width: 280px;
  height: 280px;
  right: -80px;
  top: -80px;
  border-radius: 50%;
  background: rgba(200, 245, 66, .08);
}

.feedback-copy {
  position: relative;
  z-index: 2;
}

.feedback-copy h3 {
  margin: 0;
  font-size: 26px;
  line-height: 1.45;
  font-weight: 900;
}

.feedback-copy p {
  margin: 16px 0 0;
  color: #A9C4B6;
  line-height: 1.95;
}

.feedback-form-wrap {
  position: relative;
  z-index: 2;
  background: #fff;
  border-radius: 18px;
  padding: 24px;
  color: var(--color-ink);
}

.form-row {
  margin-bottom: 16px;
}

.form-label {
  display: block;
  font-size: 14px;
  font-weight: 800;
  margin-bottom: 8px;
  color: var(--color-ink);
}

.form-control {
  width: 100%;
  height: 44px;
  border: 1px solid var(--color-line);
  border-radius: 10px;
  background: #fafcf9;
  padding: 0 14px;
  font-size: 15px;
  color: var(--color-ink);
  transition: border-color .2s ease, box-shadow .2s ease;
  font-family: inherit;
}

textarea.form-control {
  height: auto;
  padding-top: 12px;
  padding-bottom: 12px;
  min-height: 90px;
  resize: vertical;
  line-height: 1.7;
}

.select-control {
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' viewBox='0 0 20 20' fill='none' stroke='%235B6B62' stroke-width='2'%3E%3Cpath d='M6 8l4 4 4-4'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 12px center;
  background-size: 16px;
  padding-right: 40px;
}

.form-control:focus {
  outline: none;
  border-color: var(--color-volt);
  box-shadow: 0 0 0 4px rgba(200, 245, 66, .22);
}

.form-hint {
  font-size: 13px;
  color: var(--color-muted);
  margin-top: 12px;
}

.form-success {
  display: none;
  margin-top: 16px;
  padding: 14px 16px;
  border-radius: 12px;
  background: rgba(200, 245, 66, .16);
  color: #123029;
  font-size: 14px;
  font-weight: 700;
}

.form-success.show {
  display: block;
}

.faq-wrap {
  max-width: 960px;
}

.faq-item {
  background: #fff;
  border: 1px solid var(--color-line);
  border-radius: 14px;
  margin-bottom: 12px;
  overflow: hidden;
  transition: box-shadow .2s ease, border-color .2s ease;
}

.faq-item[open] {
  border-left: 3px solid var(--color-volt);
  box-shadow: var(--shadow-card);
}

.faq-item summary {
  list-style: none;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  padding: 18px 22px;
  font-size: 16px;
  line-height: 1.6;
  font-weight: 800;
  color: var(--color-ink);
  transition: background .2s ease;
}

.faq-item summary::-webkit-details-marker {
  display: none;
}

.faq-item summary:hover {
  background: #f8fbf7;
}

.faq-icon {
  width: 20px;
  height: 20px;
  color: var(--color-ink);
  flex-shrink: 0;
  transition: transform .2s ease;
}

.faq-item[open] .faq-icon {
  transform: rotate(45deg);
}

.faq-body {
  padding: 0 22px 22px;
  color: var(--color-muted);
  font-size: 15px;
  line-height: 1.9;
}

.cta-block {
  background: var(--color-abyss);
  background-image: radial-gradient(rgba(200, 245, 66, .16) 1px, transparent 1.5px);
  background-size: 32px 32px;
  color: #fff;
  text-align: center;
  padding: 90px 0;
}

.cta-title {
  margin: 0 auto;
  max-width: 780px;
  font-size: 34px;
  line-height: 1.5;
  font-weight: 900;
  letter-spacing: -.01em;
}

.cta-title em {
  font-style: normal;
  color: var(--color-volt);
}

.cta-copy {
  max-width: 640px;
  margin: 18px auto 0;
  color: #A9C6B9;
  font-size: 16px;
}

.cta-actions {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 14px;
  margin-top: 34px;
}

.site-footer {
  background: var(--color-abyss);
  color: rgba(255, 255, 255, .68);
  padding-top: 56px;
  border-top: 1px solid rgba(255, 255, 255, .06);
}

.site-footer .brand {
  color: #fff;
}

.footer-top {
  display: grid;
  grid-template-columns: 1fr;
  gap: 40px;
}

.footer-brand {
  max-width: 420px;
}

.footer-brand p {
  margin-top: 18px;
  color: #A9C6B9;
  line-height: 1.9;
  font-size: 15px;
}

.footer-links {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 32px;
}

.footer-links h4 {
  color: #fff;
  font-size: 16px;
  font-weight: 800;
  margin: 0 0 16px;
}

.footer-links ul {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 10px;
}

.footer-links a {
  color: rgba(255, 255, 255, .7);
  font-size: 14px;
  transition: color .2s ease;
}

.footer-links a:hover {
  color: var(--color-volt);
}

.footer-mid {
  border-top: 1px solid rgba(255, 255, 255, .08);
  margin-top: 40px;
  padding-top: 24px;
  padding-bottom: 24px;
}

.footer-mid ul {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 10px 24px;
}

.footer-mid a {
  font-size: 13px;
  color: rgba(255, 255, 255, .48);
  transition: color .2s ease;
}

.footer-mid a:hover {
  color: var(--color-volt);
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, .08);
  padding: 20px 0;
  display: flex;
  flex-direction: column;
  gap: 4px;
  justify-content: space-between;
  color: rgba(255, 255, 255, .36);
  font-size: 13px;
}

@media (min-width: 768px) {
  .hero-inner {
    grid-template-columns: 1fr;
  }

  .footer-top {
    grid-template-columns: 1.2fr 1fr;
  }

  .product-points {
    grid-template-columns: 1fr 1fr;
  }
}

@media (min-width: 1024px) {
  .hero-inner {
    grid-template-columns: 7fr 5fr;
    gap: 56px;
  }

  .hero h1 {
    font-size: 56px;
  }

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

  .topic-block:first-child {
    grid-row: span 2;
  }

  .process-row {
    grid-template-columns: repeat(3, 1fr);
    gap: 28px;
  }

  .process-step {
    min-height: 220px;
  }

  .process-row .process-step + .process-step {
    margin-left: 0;
  }

  .help-grid {
    grid-template-columns: 5fr 7fr;
    gap: 48px;
  }

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

  .help-entry {
    grid-template-columns: 5fr 7fr;
    gap: 32px;
    align-items: start;
  }

  .help-a {
    padding-left: 0;
  }

  .feedback-grid {
    grid-template-columns: 5fr 7fr;
    gap: 60px;
    padding: 56px 60px;
  }

  .cta-title {
    font-size: 40px;
  }

  .footer-top {
    grid-template-columns: 1.4fr 1fr;
  }

  .footer-bottom {
    flex-direction: row;
    align-items: center;
  }
}

@media (max-width: 1023px) {
  .main-nav,
  .header-cta-desktop {
    display: none !important;
  }

  .menu-btn {
    display: inline-flex;
  }

  .mobile-drawer {
    display: block;
    position: fixed;
    z-index: 90;
    top: 72px;
    left: 0;
    right: 0;
    background: rgba(7, 19, 15, .98);
    backdrop-filter: blur(12px);
    padding: 18px 24px 30px;
    border-bottom: 1px solid rgba(255, 255, 255, .1);
    opacity: 0;
    pointer-events: none;
    transform: translateY(-8px);
    transition: opacity .2s ease, transform .2s ease;
  }

  .mobile-drawer.open {
    opacity: 1;
    pointer-events: auto;
    transform: translateY(0);
  }

  .mobile-drawer .nav-link {
    display: flex;
    width: 100%;
    height: 54px;
    align-items: center;
    padding: 0 8px;
    font-size: 17px;
    color: rgba(255, 255, 255, .8);
    border-bottom: 1px solid rgba(255, 255, 255, .06);
    min-height: 54px;
  }

  .mobile-drawer .nav-link:hover {
    color: #fff;
    background: rgba(255, 255, 255, .04);
  }

  .mobile-drawer .nav-link.active {
    color: var(--color-volt);
    border-bottom-color: var(--color-volt);
  }

  .section {
    padding: 72px 0;
  }

  .section h2 {
    font-size: 26px;
  }
}

@media (max-width: 520px) {
  .hero h1 {
    font-size: 34px;
  }

  .hero-figure {
    border-radius: 16px;
  }

  .index-inner {
    padding: 14px 16px;
  }

  .section h2 {
    font-size: 24px;
  }

  .sec-no {
    font-size: 30px;
  }

  .feedback-grid {
    padding: 28px 20px;
  }

  .cta-block {
    padding: 60px 0;
  }

  .cta-title {
    font-size: 27px;
  }

  .footer-links {
    grid-template-columns: 1fr;
    gap: 28px;
  }
}