/* roulang page: index */
:root {
  --bg-base: #0A0E12;
  --bg-panel: #121821;
  --bg-panel-light: #1A2330;
  --accent: #C8F54A;
  --accent-secondary: #F5A524;
  --text-main: #F2F6F8;
  --text-sub: #8B98A5;
  --text-dim: #5B6672;
  --border-line: rgba(255,255,255,0.08);
  --border-dark: #2A3540;
  --radius-lg: 16px;
  --radius-md: 12px;
  --radius-sm: 8px;
  --radius-xs: 4px;
  --shadow-card: 0 6px 20px rgba(0,0,0,0.25);
  --shadow-hover: 0 16px 40px rgba(0,0,0,0.45), 0 0 0 1px rgba(200,245,74,0.10);
  --glow-accent: 0 0 18px rgba(200,245,74,0.25);
  --glow-btn: 0 8px 24px rgba(200,245,74,0.30);
  --font-cn: "PingFang SC", "Noto Sans SC", "Microsoft YaHei", sans-serif;
  --font-num: "Barlow Condensed", "DIN Alternate", sans-serif;
  --container-max: 1200px;
  --spacing-section: 96px;
}
*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}
html {
  scroll-behavior: smooth;
}
body {
  font-family: var(--font-cn);
  background: var(--bg-base);
  color: var(--text-main);
  font-size: 15px;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}
a {
  color: inherit;
  text-decoration: none;
  transition: color .2s ease;
}
a:hover {
  color: var(--accent);
}
img {
  max-width: 100%;
  display: block;
}
ul, ol {
  list-style: none;
}
button {
  background: none;
  border: none;
  cursor: pointer;
  font-family: inherit;
}
.container {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 24px;
}
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-cn);
  font-size: 14px;
  font-weight: 600;
  padding: 12px 28px;
  border-radius: var(--radius-sm);
  border: 1px solid transparent;
  transition: transform .2s ease, box-shadow .2s ease, background .2s ease, border-color .2s ease;
  line-height: 1.4;
  white-space: nowrap;
}
.btn:hover {
  transform: translateY(-2px);
}
.btn:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
}
.btn-accent {
  background: var(--accent);
  color: #0A0E12;
  border-color: var(--accent);
}
.btn-accent:hover {
  box-shadow: var(--glow-btn);
  background: #d4ff5e;
  color: #0A0E12;
}
.btn-outline {
  background: transparent;
  color: var(--text-main);
  border-color: rgba(255,255,255,0.30);
}
.btn-outline:hover {
  border-color: var(--accent);
  color: var(--accent);
  box-shadow: var(--glow-accent);
}
.btn-lg {
  font-size: 16px;
  padding: 15px 34px;
  min-height: 48px;
}
.tag {
  display: inline-block;
  padding: 3px 10px;
  border-radius: var(--radius-xs);
  border: 1px solid rgba(200,245,74,0.35);
  color: var(--accent);
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 0.3px;
}
/* ============ Header / Nav ============ */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  height: 64px;
  background: rgba(10,14,18,0.88);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border-line);
}
.site-header::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(90deg, var(--accent), transparent 70%);
  opacity: .8;
}
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
}
.logo {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-shrink: 0;
}
.logo-mark {
  width: 28px;
  height: 28px;
  border-radius: 6px;
  background: var(--accent);
  color: #0A0E12;
  font-weight: 800;
  font-size: 16px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  line-height: 1;
}
.logo-text {
  font-size: 16px;
  font-weight: 700;
  letter-spacing: -0.2px;
  color: var(--text-main);
  white-space: nowrap;
}
.logo-text em {
  font-style: normal;
  color: var(--accent);
  font-weight: 600;
}
.main-nav {
  display: flex;
  align-items: center;
  gap: 6px;
}
.nav-link {
  position: relative;
  font-size: 13px;
  font-weight: 500;
  letter-spacing: 0.3px;
  color: var(--text-sub);
  padding: 8px 14px;
  border-radius: var(--radius-xs);
  transition: color .2s ease;
}
.nav-link::after {
  content: "";
  position: absolute;
  left: 14px;
  right: 14px;
  bottom: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--accent), rgba(200,245,74,0.2));
  border-radius: 2px;
  transform: scaleX(0);
  transform-origin: left;
  transition: transform .25s ease;
  box-shadow: var(--glow-accent);
}
.nav-link:hover {
  color: var(--text-main);
}
.nav-link:hover::after {
  transform: scaleX(1);
}
.nav-link.active {
  color: var(--text-main);
}
.nav-link.active::after {
  transform: scaleX(1);
  animation: navBreath 3s ease-in-out infinite;
}
@keyframes navBreath {
  0%, 100% { opacity: .8; }
  50% { opacity: 1; }
}
.header-actions {
  display: flex;
  align-items: center;
  gap: 12px;
}
.header-actions .btn {
  font-size: 13px;
  padding: 8px 18px;
  min-height: 36px;
}
.hamburger {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 6px;
  width: 34px;
  height: 34px;
  border-radius: var(--radius-xs);
  background: transparent;
  padding: 0 6px;
}
.hamburger span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--text-main);
  border-radius: 2px;
  transition: transform .3s ease, opacity .3s ease;
}
.hamburger.active span:nth-child(1) {
  transform: translateY(4px) rotate(45deg);
}
.hamburger.active span:nth-child(2) {
  transform: translateY(-4px) rotate(-45deg);
}
/* ============ Hero ============ */
.hero {
  position: relative;
  min-height: 100vh;
  min-height: 600px;
  display: flex;
  align-items: center;
  background-image: linear-gradient(120deg, rgba(10,14,18,0.94) 0%, rgba(10,14,18,0.78) 45%, rgba(200,245,74,0.06) 100%), url('/assets/images/backpic/back-1.webp');
  background-size: cover;
  background-position: center;
  overflow: hidden;
}
.hero-inner {
  position: relative;
  z-index: 2;
  max-width: 720px;
  margin-left: 0;
}
.hero h1 {
  font-size: clamp(40px, 5vw, 60px);
  font-weight: 800;
  letter-spacing: -0.3px;
  line-height: 1.15;
  color: var(--text-main);
  margin-bottom: 18px;
  text-shadow: 0 4px 30px rgba(0,0,0,0.5);
}
.hero-sub {
  font-size: 16px;
  color: var(--text-sub);
  line-height: 1.6;
  margin-bottom: 32px;
  max-width: 480px;
}
.hero-cta {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
  margin-bottom: 36px;
}
.hero-trust {
  display: flex;
  flex-wrap: wrap;
  gap: 24px;
}
.hero-trust span {
  font-size: 13px;
  color: var(--text-sub);
  display: inline-flex;
  align-items: center;
  gap: 8px;
}
.hero-trust span::before {
  content: "";
  width: 4px;
  height: 4px;
  background: var(--accent);
  border-radius: 1px;
  box-shadow: var(--glow-accent);
}
.scroll-line {
  position: absolute;
  bottom: 34px;
  left: 50%;
  transform: translateX(-50%);
  width: 1px;
  height: 50px;
  background: linear-gradient(180deg, var(--accent), transparent);
  animation: scrollPulse 2s ease-in-out infinite;
}
@keyframes scrollPulse {
  0%, 100% { opacity: .6; transform: translateX(-50%) scaleY(0.8); }
  50% { opacity: 1; transform: translateX(-50%) scaleY(1); }
}
.hero-glow {
  position: absolute;
  top: 20%;
  right: 10%;
  width: 300px;
  height: 300px;
  background: radial-gradient(circle, rgba(200,245,74,0.08) 0%, transparent 70%);
  border-radius: 50%;
  pointer-events: none;
  z-index: 1;
}
/* ============ Section Common ============ */
.section-block {
  padding: var(--spacing-section) 0;
  position: relative;
}
.section-title {
  font-size: clamp(26px, 3vw, 36px);
  font-weight: 700;
  line-height: 1.3;
  color: var(--text-main);
  display: flex;
  align-items: center;
  gap: 14px;
  margin-bottom: 16px;
}
.section-title::before {
  content: "";
  width: 24px;
  height: 3px;
  background: var(--accent);
  border-radius: 3px;
  box-shadow: var(--glow-accent);
  flex-shrink: 0;
}
.section-desc {
  color: var(--text-sub);
  font-size: 15px;
  max-width: 560px;
  margin-bottom: 40px;
}
/* ============ Steps ============ */
.steps-section {
  background: var(--bg-base);
  padding: var(--spacing-section) 0;
}
.steps-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  position: relative;
}
.step-card {
  background: var(--bg-panel);
  border-radius: var(--radius-lg);
  padding: 32px;
  position: relative;
  transition: transform .3s ease, box-shadow .3s ease, background .3s ease;
  opacity: 0;
  transform: translateY(24px);
}
.step-card.visible {
  opacity: 1;
  transform: translateY(0);
  transition: opacity .6s ease, transform .6s ease, box-shadow .3s ease, background .3s ease;
}
.step-card:hover {
  background: var(--bg-panel-light);
  box-shadow: var(--shadow-hover);
  transform: translateY(-4px);
}
.step-card:nth-child(2) {
  margin-top: 12px;
}
.step-num {
  font-family: var(--font-num);
  font-size: 50px;
  font-weight: 600;
  color: var(--accent);
  line-height: 1;
  display: block;
  margin-bottom: 20px;
  text-shadow: 0 0 20px rgba(200,245,74,0.15);
}
.step-card h3 {
  font-size: 18px;
  font-weight: 600;
  color: var(--text-main);
  margin-bottom: 12px;
  position: relative;
  padding-bottom: 14px;
}
.step-card h3::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 40px;
  height: 2px;
  background: linear-gradient(90deg, var(--accent), transparent);
  border-radius: 2px;
}
.step-card p {
  font-size: 14px;
  color: var(--text-sub);
  line-height: 1.6;
  margin: 0;
}
.steps-grid::before {
  content: "";
  position: absolute;
  top: 30px;
  left: 20%;
  right: 20%;
  height: 2px;
  background-image: linear-gradient(90deg, rgba(200,245,74,0.25) 33%, transparent 33%);
  background-size: 12px 2px;
  background-repeat: repeat-x;
  z-index: 0;
  opacity: 0;
  transition: opacity .8s ease;
}
.steps-grid.visible::before {
  opacity: 1;
}
/* ============ Cases ============ */
.cases-section {
  background: var(--bg-base);
  padding: var(--spacing-section) 0;
}
.section-head {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  margin-bottom: 40px;
  gap: 16px;
  flex-wrap: wrap;
}
.section-more {
  font-size: 14px;
  color: var(--text-sub);
  display: inline-flex;
  align-items: center;
  gap: 6px;
  transition: gap .2s ease, color .2s ease;
}
.section-more:hover {
  color: var(--accent);
  gap: 10px;
}
.cases-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
}
.case-card {
  background: var(--bg-panel);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: transform .3s ease, box-shadow .3s ease;
  opacity: 0;
  transform: translateY(24px);
}
.case-card.visible {
  opacity: 1;
  transform: translateY(0);
  transition: opacity .6s ease, transform .6s ease, box-shadow .3s ease;
}
.case-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-hover);
}
.case-cover {
  width: 100%;
  aspect-ratio: 16/9;
  overflow: hidden;
}
.case-cover img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform .4s ease;
  filter: saturate(0.85) contrast(1.05);
}
.case-card:hover .case-cover img {
  transform: scale(1.03);
}
.case-content {
  padding: 24px;
  position: relative;
}
.case-meta {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 12px;
}
.case-meta h3 {
  font-size: 18px;
  font-weight: 600;
  color: var(--text-main);
  line-height: 1.3;
}
.case-stat {
  font-family: var(--font-num);
  font-size: 32px;
  font-weight: 600;
  color: var(--accent-secondary);
  line-height: 1;
  display: flex;
  align-items: baseline;
  gap: 2px;
  position: relative;
}
.case-stat::before {
  content: "";
  position: absolute;
  top: -6px;
  right: -6px;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--accent-secondary);
  opacity: .4;
}
.case-stat small {
  font-family: var(--font-cn);
  font-size: 12px;
  font-weight: 500;
  color: var(--text-dim);
}
.case-content > p {
  font-size: 14px;
  color: var(--text-sub);
  line-height: 1.6;
  margin-bottom: 16px;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.case-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding-top: 14px;
  border-top: 1px solid var(--border-line);
}
.case-date {
  font-size: 13px;
  color: var(--text-dim);
  font-family: var(--font-num);
  letter-spacing: 0.5px;
}
/* ============ FAQ ============ */
.faq-section {
  background: var(--bg-base);
  padding: var(--spacing-section) 0;
  position: relative;
}
.faq-list {
  max-width: 760px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 12px;
}
.faq-item {
  background: var(--bg-panel);
  border: 1px solid rgba(255,255,255,0.06);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: border-color .3s ease, box-shadow .3s ease;
  opacity: 0;
  transform: translateY(16px);
}
.faq-item.visible {
  opacity: 1;
  transform: translateY(0);
  transition: opacity .5s ease, transform .5s ease, border-color .3s ease, box-shadow .3s ease;
}
.faq-item.active {
  border-color: rgba(200,245,74,0.2);
  box-shadow: 0 6px 20px rgba(0,0,0,0.25);
}
.faq-q {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 20px 20px;
  cursor: pointer;
}
.faq-icon {
  width: 28px;
  height: 28px;
  border: 1px solid rgba(200,245,74,0.4);
  border-radius: var(--radius-xs);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  color: var(--accent);
  font-size: 14px;
  font-weight: 600;
  flex-shrink: 0;
}
.faq-q h3 {
  font-size: 16px;
  font-weight: 600;
  color: var(--text-main);
  flex: 1;
  line-height: 1.4;
}
.faq-toggle {
  width: 24px;
  height: 24px;
  border: 1px solid rgba(255,255,255,0.2);
  border-radius: 50%;
  color: var(--text-sub);
  font-size: 16px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  transition: transform .35s ease, border-color .3s ease, color .3s ease;
  flex-shrink: 0;
  line-height: 1;
}
.faq-item.active .faq-toggle {
  transform: rotate(45deg);
  border-color: var(--accent);
  color: var(--accent);
}
.faq-a {
  max-height: 0;
  overflow: hidden;
  transition: max-height .35s ease;
}
.faq-item.active .faq-a {
  max-height: 300px;
}
.faq-a p {
  padding: 0 20px 20px 52px;
  font-size: 14px;
  color: var(--text-sub);
  line-height: 1.7;
}
/* ============ News Feed / CMS ============ */
.news-feed {
  background: var(--bg-base);
  padding: var(--spacing-section) 0;
}
.news-panel {
  background: var(--bg-panel);
  border-radius: var(--radius-lg);
  padding: 32px;
  border: 1px solid var(--border-line);
}
.news-item {
  display: flex;
  align-items: center;
  gap: 20px;
  padding: 20px 12px;
  border-bottom: 1px solid var(--border-line);
  position: relative;
  transition: background .25s ease;
}
.news-item:last-child {
  border-bottom: none;
}
.news-item::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 2px;
  background: var(--accent);
  opacity: 0;
  transition: opacity .25s ease;
}
.news-item:hover {
  background: rgba(200,245,74,0.03);
}
.news-item:hover::before {
  opacity: 1;
}
.news-item:hover .news-arrow {
  transform: translateX(4px);
  color: var(--accent);
}
.news-date {
  width: 80px;
  text-align: center;
  flex-shrink: 0;
  display: flex;
  flex-direction: column;
}
.news-day {
  font-family: var(--font-num);
  font-size: 36px;
  font-weight: 600;
  color: var(--accent-secondary);
  line-height: 1;
}
.news-month {
  font-size: 12px;
  color: var(--text-dim);
  margin-top: 4px;
}
.news-body {
  flex: 1;
  min-width: 0;
}
.news-body h3 {
  font-size: 16px;
  font-weight: 600;
  color: var(--text-main);
  margin-bottom: 6px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  transition: color .2s ease;
}
.news-body h3:hover {
  color: var(--accent);
}
.news-body p {
  font-size: 14px;
  color: var(--text-sub);
  line-height: 1.5;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  margin-bottom: 8px;
}
.news-arrow {
  font-size: 18px;
  color: var(--text-dim);
  transition: transform .25s ease, color .25s ease;
  flex-shrink: 0;
}
.news-empty {
  text-align: center;
  padding: 48px 24px;
  color: var(--text-sub);
  font-size: 14px;
  border: 2px dashed var(--border-dark);
  border-radius: var(--radius-md);
}
/* ============ CTA ============ */
.cta-section {
  position: relative;
  padding: var(--spacing-section) 0;
  background-image: linear-gradient(135deg, rgba(10,14,18,0.92) 0%, rgba(10,14,18,0.80) 50%, rgba(200,245,74,0.03) 100%), url('/assets/images/backpic/back-2.webp');
  background-size: cover;
  background-position: center;
  overflow: hidden;
  text-align: center;
}
.cta-section::before {
  content: "";
  position: absolute;
  top: -60px;
  right: -60px;
  width: 200px;
  height: 200px;
  border: 1px solid rgba(200,245,74,0.2);
  border-radius: 50%;
  box-shadow: 0 0 40px rgba(200,245,74,0.08);
  pointer-events: none;
}
.cta-section::after {
  content: "";
  position: absolute;
  bottom: -80px;
  left: -80px;
  width: 260px;
  height: 260px;
  border: 1px solid rgba(200,245,74,0.10);
  border-radius: 50%;
  pointer-events: none;
}
.cta-content {
  position: relative;
  z-index: 2;
  max-width: 640px;
  margin: 0 auto;
}
.cta-content h2 {
  font-size: clamp(28px, 3.5vw, 38px);
  font-weight: 700;
  color: var(--text-main);
  margin-bottom: 16px;
  line-height: 1.3;
}
.cta-content p {
  font-size: 14px;
  color: var(--text-sub);
  margin-bottom: 32px;
}
.cta-content .btn {
  min-height: 54px;
  padding: 14px 40px;
  font-size: 16px;
}
/* ============ Footer ============ */
.site-footer {
  background: #080B0F;
  border-top: 1px solid rgba(200,245,74,0.20);
  padding: 64px 0 0;
}
.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1.5fr;
  gap: 40px;
  margin-bottom: 48px;
}
.footer-brand .logo {
  margin-bottom: 16px;
}
.footer-brand p {
  font-size: 13px;
  color: var(--text-sub);
  line-height: 1.6;
  margin-bottom: 16px;
  max-width: 260px;
}
.footer-icp {
  font-size: 12px;
  color: var(--text-dim);
}
.footer-col h4 {
  font-size: 14px;
  font-weight: 600;
  color: var(--text-main);
  margin-bottom: 16px;
}
.footer-col ul li {
  margin-bottom: 10px;
}
.footer-col ul li a {
  font-size: 13px;
  color: var(--text-sub);
  transition: color .2s ease, padding-left .2s ease;
}
.footer-col ul li a:hover {
  color: var(--accent);
  padding-left: 4px;
}
.contact-item {
  font-size: 13px;
  color: var(--text-sub);
  margin-bottom: 10px;
  display: flex;
  align-items: center;
  gap: 8px;
}
.contact-item::before {
  content: "";
  width: 4px;
  height: 4px;
  background: var(--accent);
  border-radius: 50%;
  flex-shrink: 0;
}
.footer-bottom {
  border-top: 1px solid var(--border-line);
  padding: 20px 0;
  text-align: center;
}
.footer-bottom span {
  font-size: 13px;
  color: var(--text-dim);
}
.footer-bottom .dot {
  margin: 0 8px;
  color: var(--accent);
}
/* ============ Reveal Animations ============ */
.reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity .6s ease, transform .6s ease;
}
.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
  .step-card,
  .case-card,
  .faq-item,
  .reveal {
    opacity: 1;
    transform: none;
  }
}
/* ============ Responsive ============ */
@media (max-width: 1200px) {
  .container {
    padding: 0 20px;
  }
  :root {
    --spacing-section: 80px;
  }
}
@media (max-width: 992px) {
  :root {
    --spacing-section: 64px;
  }
  .main-nav {
    gap: 2px;
  }
  .nav-link {
    padding: 8px 10px;
    font-size: 12px;
  }
  .hero {
    min-height: 85vh;
  }
  .steps-grid {
    grid-template-columns: repeat(3, 1fr);
    gap: 16px;
  }
  .step-card {
    padding: 24px;
  }
  .footer-grid {
    grid-template-columns: 1fr 1fr;
    gap: 32px;
  }
}
@media (max-width: 768px) {
  :root {
    --spacing-section: 48px;
  }
  .site-header {
    height: 56px;
  }
  .header-inner {
    height: 56px;
  }
  .main-nav {
    position: fixed;
    top: 56px;
    right: 0;
    width: 70%;
    max-width: 320px;
    height: calc(100vh - 56px);
    background: rgba(10,14,18,0.98);
    backdrop-filter: blur(16px);
    flex-direction: column;
    align-items: flex-start;
    padding: 32px 24px;
    gap: 8px;
    transform: translateX(100%);
    transition: transform .35s ease;
    border-left: 1px solid var(--border-line);
    box-shadow: -10px 0 30px rgba(0,0,0,0.4);
    overflow-y: auto;
  }
  .main-nav.open {
    transform: translateX(0);
  }
  .nav-link {
    font-size: 15px;
    padding: 12px 16px;
    width: 100%;
    border-radius: var(--radius-sm);
  }
  .nav-link::after {
    display: none;
  }
  .nav-link.active {
    background: rgba(200,245,74,0.08);
    color: var(--accent);
  }
  .nav-link:hover {
    background: rgba(255,255,255,0.05);
    color: var(--text-main);
  }
  .header-actions .btn-outline {
    display: none;
  }
  .hamburger {
    display: flex;
  }
  .hero {
    min-height: 90vh;
    align-items: center;
  }
  .hero h1 {
    font-size: clamp(30px, 7vw, 42px);
  }
  .hero-sub {
    font-size: 15px;
  }
  .hero-cta {
    flex-direction: column;
    align-items: flex-start;
  }
  .hero-cta .btn {
    width: 100%;
    max-width: 280px;
  }
  .steps-grid {
    grid-template-columns: 1fr;
    gap: 20px;
  }
  .steps-grid::before {
    display: none;
  }
  .step-card:nth-child(2) {
    margin-top: 0;
  }
  .cases-grid {
    grid-template-columns: 1fr;
    gap: 20px;
  }
  .section-head {
    flex-direction: column;
    align-items: flex-start;
  }
  .news-panel {
    padding: 16px;
  }
  .news-item {
    flex-wrap: wrap;
    gap: 12px;
    padding: 16px 8px;
  }
  .news-date {
    width: 60px;
  }
  .news-day {
    font-size: 28px;
  }
  .news-body h3 {
    font-size: 15px;
  }
  .news-body p {
    white-space: normal;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    line-height: 1.5;
  }
  .footer-grid {
    grid-template-columns: 1fr;
    gap: 32px;
  }
  .footer-brand p {
    max-width: none;
  }
  .cta-section {
    padding: 64px 0;
  }
}
@media (max-width: 576px) {
  .container {
    padding: 0 16px;
  }
  .logo-text {
    font-size: 14px;
  }
  .logo-mark {
    width: 24px;
    height: 24px;
    font-size: 14px;
  }
  .hero-cta .btn {
    max-width: 100%;
  }
  .hero-trust {
    gap: 16px;
  }
  .hero-trust span {
    font-size: 12px;
  }
  .step-card {
    padding: 20px;
  }
  .step-num {
    font-size: 40px;
  }
  .case-content {
    padding: 20px;
  }
  .case-stat {
    font-size: 26px;
  }
  .faq-q {
    padding: 16px;
    gap: 12px;
  }
  .faq-q h3 {
    font-size: 15px;
  }
  .faq-a p {
    padding: 0 16px 16px 44px;
    font-size: 13px;
  }
  .footer-bottom span {
    font-size: 12px;
    display: block;
    line-height: 1.8;
  }
  .footer-bottom .dot {
    display: none;
  }
}
@media (min-width: 769px) {
  .main-nav {
    display: flex !important;
  }
}

/* roulang page: category1 */
:root {
  --bg-base: #0A0E12;
  --bg-panel: #121821;
  --bg-panel-2: #1A2330;
  --accent: #C8F54A;
  --accent-secondary: #F5A524;
  --text-main: #F2F6F8;
  --text-sub: #8B98A5;
  --text-weak: #5B6672;
  --line: rgba(255, 255, 255, 0.08);
  --line-dark: #2A3540;
  --radius-lg: 16px;
  --radius-md: 8px;
  --radius-sm: 4px;
  --spacing-section: 96px;
  --shadow-card: 0 6px 20px rgba(0, 0, 0, 0.25);
  --shadow-hover: 0 16px 40px rgba(0, 0, 0, 0.45), 0 0 0 1px rgba(200, 245, 74, 0.10);
  --glow: 0 0 18px rgba(200, 245, 74, 0.25);
  --font-sans: "PingFang SC", "Noto Sans SC", "Microsoft YaHei", sans-serif;
  --font-num: "DIN Alternate", "Barlow Condensed", "Arial Narrow", sans-serif;
}
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}
html {
  scroll-behavior: smooth;
}
body {
  background: var(--bg-base);
  color: var(--text-main);
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}
img {
  max-width: 100%;
  height: auto;
  display: block;
  filter: saturate(0.85) contrast(1.05);
}
a {
  color: inherit;
  text-decoration: none;
  transition: color 0.2s ease;
}
a:focus-visible, button:focus-visible, summary:focus-visible, input:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}
ul {
  list-style: none;
}
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  height: 64px;
  background: rgba(10, 14, 18, 0.85);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--line);
}
.site-header::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(90deg, var(--accent), transparent);
}
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
  gap: 24px;
}
.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
}
.logo-mark {
  width: 28px;
  height: 28px;
  border-radius: var(--radius-md);
  background: var(--accent);
  color: #0A0E12;
  font-weight: 800;
  font-size: 17px;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: var(--glow);
}
.logo-text {
  font-size: 16px;
  font-weight: 700;
  letter-spacing: 0.04em;
  color: var(--text-main);
  white-space: nowrap;
}
.logo-text em {
  font-style: normal;
  color: var(--accent);
}
.main-nav {
  display: flex;
  align-items: center;
  gap: 28px;
}
.nav-link {
  position: relative;
  font-size: 13px;
  letter-spacing: 0.3px;
  color: var(--text-sub);
  padding: 10px 2px;
  transition: color 0.2s ease;
}
.nav-link::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--accent), transparent);
  transform: scaleX(0);
  transform-origin: left center;
  transition: transform 0.25s ease;
}
.nav-link:hover {
  color: #ffffff;
}
.nav-link:hover::after {
  transform: scaleX(1);
}
.nav-link.active {
  color: #ffffff;
}
.nav-link.active::after {
  transform: scaleX(1);
  box-shadow: 0 0 8px rgba(200, 245, 74, 0.6);
  animation: breathe 3s ease-in-out infinite;
}
@keyframes breathe {
  0%, 100% { opacity: 0.8; }
  50% { opacity: 1; }
}
.header-cta {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-shrink: 0;
}
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  height: 44px;
  padding: 0 24px;
  border-radius: var(--radius-md);
  font-size: 14px;
  font-weight: 600;
  text-decoration: none;
  border: none;
  cursor: pointer;
  transition: all 0.2s ease;
  white-space: nowrap;
}
.btn-primary {
  background: var(--accent);
  color: #0A0E12;
}
.btn-primary:hover {
  background: #D6FF5E;
  box-shadow: 0 8px 24px rgba(200, 245, 74, 0.30);
  transform: translateY(-2px);
}
.btn-ghost {
  background: transparent;
  color: var(--text-main);
  border: 1px solid rgba(255, 255, 255, 0.25);
}
.btn-ghost:hover {
  border-color: var(--accent);
  color: var(--accent);
  transform: translateY(-2px);
}
.btn-lg {
  height: 54px;
  padding: 0 36px;
  font-size: 16px;
}
.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 40px;
  height: 40px;
  border: 1px solid rgba(255, 255, 255, 0.2);
  border-radius: var(--radius-md);
  background: transparent;
  cursor: pointer;
  padding: 0 10px;
  flex-shrink: 0;
}
.nav-toggle span {
  display: block;
  height: 1px;
  background: #ffffff;
  transition: all 0.25s ease;
}
.nav-toggle.open span:first-child {
  transform: translateY(6px) rotate(45deg);
}
.nav-toggle.open span:last-child {
  transform: translateY(-6px) rotate(-45deg);
}
.page-hero {
  position: relative;
  margin-top: 64px;
  padding: 130px 0 72px;
  background: url('/assets/images/backpic/back-1.webp') center center / cover no-repeat;
  background-color: var(--bg-base);
}
.page-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(120deg, rgba(10, 14, 18, 0.95) 0%, rgba(10, 14, 18, 0.80) 60%, rgba(200, 245, 74, 0.06) 100%);
}
.page-hero .container {
  position: relative;
  z-index: 1;
}
.breadcrumb {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  color: var(--text-sub);
  margin-bottom: 20px;
}
.breadcrumb a {
  color: var(--text-sub);
  text-decoration: none;
}
.breadcrumb a:hover {
  color: var(--accent);
}
.breadcrumb .sep {
  color: var(--text-weak);
}
.breadcrumb .current {
  color: var(--text-main);
}
.page-hero h1 {
  font-size: clamp(34px, 4vw, 48px);
  font-weight: 800;
  letter-spacing: -0.3px;
  line-height: 1.15;
  color: var(--text-main);
  margin: 0 0 16px;
}
.page-hero h1::after {
  content: "";
  display: block;
  width: 44px;
  height: 4px;
  border-radius: 2px;
  background: var(--accent);
  margin-top: 20px;
  box-shadow: var(--glow);
}
.hero-sub {
  font-size: 16px;
  color: var(--text-sub);
  line-height: 1.6;
  max-width: 620px;
}
.page-main {
  padding: 80px 0 32px;
}
.page-body {
  max-width: 840px;
  margin: 0 auto;
}
.page-body p {
  font-size: 16px;
  line-height: 1.75;
  color: var(--text-sub);
  margin-bottom: 20px;
}
.page-body strong {
  color: var(--text-main);
  font-weight: 600;
}
.page-body h2 {
  font-size: clamp(22px, 2.6vw, 28px);
  font-weight: 700;
  color: var(--text-main);
  margin: 52px 0 18px;
  padding-left: 18px;
  position: relative;
}
.page-body h2::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.25em;
  width: 4px;
  height: 0.62em;
  background: var(--accent);
  border-radius: 2px;
  box-shadow: var(--glow);
}
.page-body ul {
  padding-left: 20px;
  color: var(--text-sub);
  line-height: 1.75;
  margin-bottom: 20px;
}
.page-body ul li {
  margin: 8px 0;
  position: relative;
  padding-left: 14px;
}
.page-body ul li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.70em;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--accent);
  opacity: 0.7;
}
.page-body blockquote {
  margin: 32px 0;
  padding: 20px 24px;
  background: var(--bg-panel);
  border-left: 3px solid var(--accent);
  border-radius: 0 var(--radius-lg) var(--radius-lg) 0;
  color: var(--text-main);
  font-size: 15px;
  line-height: 1.7;
}
.page-figure {
  margin: 36px 0;
}
.page-figure img {
  width: 100%;
  border-radius: 12px;
  object-fit: cover;
  aspect-ratio: 16 / 9;
}
.fig-caption {
  font-size: 12px;
  color: var(--text-weak);
  text-align: center;
  margin-top: 10px;
  letter-spacing: 0.3px;
}
.step-list {
  padding: 0;
  margin: 20px 0 32px;
}
.step-item {
  position: relative;
  padding: 24px 0 24px 64px;
  border-bottom: 1px solid var(--line);
}
.step-item:last-child {
  border-bottom: none;
}
.step-item::before {
  content: "";
  position: absolute;
  left: 22px;
  top: 24px;
  bottom: 0;
  width: 1px;
  background: rgba(200, 245, 74, 0.18);
}
.step-item:last-child::before {
  display: none;
}
.step-num {
  position: absolute;
  left: 0;
  top: 20px;
  width: 44px;
  font-family: var(--font-num);
  font-size: 40px;
  font-weight: 600;
  color: var(--accent);
  line-height: 1;
}
.step-item h3 {
  font-size: 18px;
  font-weight: 600;
  color: var(--text-main);
  margin-bottom: 8px;
}
.step-item p {
  font-size: 14px;
  color: var(--text-sub);
  line-height: 1.7;
  margin: 0;
}
.faq-list {
  max-width: 760px;
  margin: 24px 0 0;
  display: grid;
  gap: 12px;
}
.faq-item {
  background: var(--bg-panel);
  border: 1px solid rgba(255, 255, 255, 0.06);
  border-radius: 12px;
  overflow: hidden;
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}
.faq-item[open] {
  border-color: rgba(200, 245, 74, 0.35);
  box-shadow: 0 6px 20px rgba(0, 0, 0, 0.25);
}
.faq-item summary {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 18px 20px;
  cursor: pointer;
  font-size: 15px;
  font-weight: 600;
  color: var(--text-main);
  list-style: none;
  user-select: none;
}
.faq-item summary::-webkit-details-marker {
  display: none;
}
.faq-item summary:hover {
  background: rgba(200, 245, 74, 0.03);
}
.faq-icon {
  flex: 0 0 24px;
  height: 24px;
  border-radius: 6px;
  border: 1px solid rgba(200, 245, 74, 0.5);
  color: var(--accent);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 16px;
  font-weight: 500;
  line-height: 1;
  transition: transform 0.3s ease, background 0.2s ease;
}
.faq-item[open] .faq-icon {
  transform: rotate(45deg);
  background: rgba(200, 245, 74, 0.12);
}
.faq-answer {
  padding: 0 20px 20px 58px;
  font-size: 14px;
  color: var(--text-sub);
  line-height: 1.7;
}
.page-cta {
  position: relative;
  text-align: center;
  padding: 96px 24px;
  margin-top: 72px;
  background: var(--bg-panel);
  overflow: hidden;
}
.page-cta::before {
  content: "";
  position: absolute;
  width: 280px;
  height: 280px;
  right: -80px;
  top: -80px;
  border: 1px solid rgba(200, 245, 74, 0.35);
  border-radius: 50%;
  box-shadow: 0 0 60px rgba(200, 245, 74, 0.12);
}
.page-cta::after {
  content: "";
  position: absolute;
  width: 180px;
  height: 180px;
  right: 10px;
  top: 10px;
  border: 1px solid rgba(200, 245, 74, 0.2);
  border-radius: 50%;
}
.page-cta .container {
  position: relative;
  z-index: 1;
}
.page-cta h2 {
  font-size: clamp(26px, 3vw, 36px);
  font-weight: 700;
  color: var(--text-main);
  margin-bottom: 12px;
  letter-spacing: -0.2px;
}
.page-cta p {
  color: var(--text-sub);
  font-size: 14px;
  margin-bottom: 30px;
}
.cta-actions {
  display: flex;
  gap: 16px;
  justify-content: center;
  flex-wrap: wrap;
}
.site-footer {
  background: #080B0F;
  border-top: 1px solid rgba(200, 245, 74, 0.20);
  padding: 64px 0 32px;
}
.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1.2fr;
  gap: 40px;
}
.footer-brand p {
  font-size: 14px;
  color: var(--text-sub);
  line-height: 1.7;
  margin: 14px 0 12px;
  max-width: 280px;
}
.footer-icp {
  font-size: 12px;
  color: var(--text-weak);
}
.footer-col h4 {
  font-size: 14px;
  color: var(--text-main);
  font-weight: 600;
  margin-bottom: 16px;
}
.footer-col ul {
  padding: 0;
}
.footer-col ul li {
  margin-bottom: 10px;
}
.footer-col ul a {
  font-size: 13px;
  color: var(--text-sub);
  text-decoration: none;
  transition: color 0.2s ease, padding-left 0.2s ease;
}
.footer-col ul a:hover {
  color: var(--accent);
  padding-left: 4px;
}
.contact-item {
  font-size: 13px;
  color: var(--text-sub);
  margin-bottom: 10px;
  line-height: 1.6;
}
.footer-bottom {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-top: 48px;
  padding-top: 24px;
  border-top: 1px solid var(--line);
  font-size: 13px;
  color: var(--text-weak);
  flex-wrap: wrap;
}
.footer-bottom .dot {
  color: rgba(255, 255, 255, 0.15);
}
.fade-up {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}
.fade-up.will-animate.visible {
  opacity: 1;
  transform: translateY(0);
}
@media (max-width: 1200px) {
  .container {
    max-width: 100%;
  }
}
@media (max-width: 992px) {
  .main-nav {
    position: fixed;
    top: 64px;
    right: 0;
    bottom: 0;
    width: min(320px, 80vw);
    background: rgba(10, 14, 18, 0.98);
    border-left: 1px solid var(--line);
    flex-direction: column;
    align-items: stretch;
    gap: 4px;
    padding: 32px 24px;
    transform: translateX(100%);
    transition: transform 0.3s ease;
  }
  .main-nav.open {
    transform: translateX(0);
  }
  .nav-link {
    padding: 14px 12px;
    font-size: 15px;
  }
  .nav-link::after {
    left: 12px;
    right: auto;
    width: 24px;
    height: 2px;
  }
  .nav-link.active {
    background: rgba(200, 245, 74, 0.06);
    border-radius: var(--radius-md);
  }
  .header-cta {
    display: none;
  }
  .nav-toggle {
    display: flex;
  }
  .footer-grid {
    grid-template-columns: 1fr 1fr;
    gap: 32px;
  }
  .footer-brand {
    grid-column: 1 / -1;
  }
  .page-cta {
    padding: 72px 24px;
  }
}
@media (max-width: 768px) {
  :root {
    --spacing-section: 64px;
  }
  .container {
    padding: 0 16px;
  }
  .page-hero {
    padding: 104px 0 56px;
  }
  .page-main {
    padding: 56px 0 16px;
  }
  .step-item {
    padding-left: 52px;
  }
  .step-num {
    font-size: 34px;
    width: 36px;
  }
  .step-item::before {
    left: 18px;
  }
  .page-cta {
    margin-top: 48px;
    padding: 64px 16px;
  }
  .cta-actions {
    flex-direction: column;
    align-items: center;
  }
  .cta-actions .btn {
    width: 100%;
    max-width: 320px;
  }
}
@media (max-width: 576px) {
  .footer-grid {
    grid-template-columns: 1fr;
    gap: 28px;
  }
  .footer-brand {
    grid-column: 1;
  }
  .page-hero h1 {
    font-size: 32px;
  }
  .hero-sub {
    font-size: 15px;
  }
  .faq-answer {
    padding-left: 48px;
  }
}
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
  html {
    scroll-behavior: auto;
  }
  .fade-up {
    opacity: 1;
    transform: none;
    transition: none;
  }
}

/* roulang page: article */
:root {
            --bg-base: #0A0E12;
            --bg-panel: #121821;
            --bg-panel-light: #1A2330;
            --accent: #C8F54A;
            --accent-soft: rgba(200, 245, 74, 0.10);
            --accent-secondary: #F5A524;
            --text-main: #F2F6F8;
            --text-sub: #8B98A5;
            --text-muted: #5B6672;
            --border: rgba(255, 255, 255, 0.08);
            --border-dark: #2A3540;
            --radius-lg: 16px;
            --radius-md: 12px;
            --radius-sm: 8px;
            --shadow-card: 0 6px 20px rgba(0, 0, 0, 0.25);
            --shadow-hover: 0 16px 40px rgba(0, 0, 0, 0.45), 0 0 0 1px rgba(200, 245, 74, 0.10);
            --spacing-section: 96px;
            --font-main: "PingFang SC", "Noto Sans SC", "Microsoft YaHei", -apple-system, sans-serif;
            --font-num: "Barlow Condensed", "DIN Alternate", "Arial Narrow", sans-serif;
        }

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

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: var(--font-main);
            font-size: 15px;
            line-height: 1.7;
            color: var(--text-main);
            background-color: var(--bg-base);
            -webkit-font-smoothing: antialiased;
        }

        a {
            color: var(--accent);
            text-decoration: none;
            transition: color 0.2s ease;
        }

        a:hover {
            color: #dff97a;
        }

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

        button {
            font-family: inherit;
            cursor: pointer;
            border: none;
            background: none;
        }

        input,
        textarea {
            font-family: inherit;
        }

        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 24px;
        }

        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 100;
            height: 64px;
            background: rgba(10, 14, 18, 0.85);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border-bottom: 1px solid var(--border);
        }

        .site-header::before {
            content: "";
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 1px;
            background: linear-gradient(90deg, var(--accent) 0%, transparent 100%);
            opacity: 0.7;
        }

        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 64px;
            gap: 24px;
        }

        .logo {
            display: flex;
            align-items: center;
            gap: 10px;
            flex-shrink: 0;
        }

        .logo-mark {
            display: flex;
            align-items: center;
            justify-content: center;
            width: 30px;
            height: 30px;
            border-radius: 8px;
            background: var(--accent);
            color: #0A0E12;
            font-size: 18px;
            font-weight: 800;
            line-height: 1;
            box-shadow: 0 0 18px rgba(200, 245, 74, 0.35);
        }

        .logo-text {
            font-size: 17px;
            font-weight: 700;
            letter-spacing: 0.4px;
            color: #fff;
            white-space: nowrap;
        }

        .logo-text em {
            font-style: normal;
            color: var(--accent);
        }

        .main-nav {
            display: flex;
            align-items: center;
            gap: 4px;
            margin: 0 auto;
        }

        .nav-link {
            display: block;
            padding: 8px 16px;
            font-size: 13px;
            font-weight: 500;
            letter-spacing: 0.3px;
            color: var(--text-sub);
            border-radius: 6px;
            position: relative;
            transition: color 0.2s ease, background 0.2s ease;
        }

        .nav-link:hover {
            color: #fff;
            background: rgba(255, 255, 255, 0.04);
        }

        .nav-link.active {
            color: #fff;
            font-weight: 600;
        }

        .nav-link.active::after {
            content: "";
            position: absolute;
            left: 16px;
            right: 16px;
            bottom: 2px;
            height: 2px;
            background: var(--accent);
            border-radius: 2px;
            box-shadow: 0 0 12px rgba(200, 245, 74, 0.7);
            animation: breathe 3s ease-in-out infinite;
        }

        @keyframes breathe {
            0%, 100% { opacity: 0.8; }
            50% { opacity: 1; }
        }

        .header-actions {
            display: flex;
            align-items: center;
            gap: 12px;
            flex-shrink: 0;
        }

        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            height: 38px;
            padding: 0 22px;
            border-radius: var(--radius-sm);
            font-size: 13px;
            font-weight: 600;
            letter-spacing: 0.4px;
            transition: transform 0.2s ease, box-shadow 0.2s ease, border-color 0.2s ease, background 0.2s ease;
            white-space: nowrap;
        }

        .btn:hover {
            transform: translateY(-2px);
        }

        .btn-primary {
            background: var(--accent);
            color: #0A0E12;
            box-shadow: 0 0 16px rgba(200, 245, 74, 0.18);
        }

        .btn-primary:hover {
            color: #0A0E12;
            box-shadow: 0 8px 24px rgba(200, 245, 74, 0.32);
        }

        .btn-border {
            background: transparent;
            color: var(--text-main);
            border: 1px solid var(--border-dark);
        }

        .btn-border:hover {
            border-color: var(--accent);
            color: var(--accent);
        }

        .nav-toggle {
            display: none;
            flex-direction: column;
            justify-content: center;
            gap: 6px;
            width: 40px;
            height: 40px;
            padding: 8px;
            border-radius: 8px;
            background: rgba(255, 255, 255, 0.04);
            border: 1px solid var(--border);
            align-items: center;
            flex-shrink: 0;
        }

        .nav-toggle .bar {
            display: block;
            width: 20px;
            height: 2px;
            border-radius: 2px;
            background: var(--text-main);
            transition: transform 0.2s ease, opacity 0.2s ease;
        }

        .nav-toggle.active .bar:nth-child(1) {
            transform: translateY(4px) rotate(45deg);
        }

        .nav-toggle.active .bar:nth-child(2) {
            transform: translateY(-4px) rotate(-45deg);
        }

        main {
            min-height: 70vh;
        }

        .article-main {
            padding: 96px 0 96px;
        }

        .breadcrumb {
            display: flex;
            align-items: center;
            flex-wrap: wrap;
            gap: 8px;
            max-width: 864px;
            margin: 0 auto 20px;
            font-size: 13px;
            color: var(--text-muted);
        }

        .breadcrumb a {
            color: var(--text-muted);
            text-decoration: none;
            transition: color 0.2s ease;
        }

        .breadcrumb a:hover {
            color: var(--accent);
        }

        .breadcrumb .sep {
            color: #3a4550;
            font-size: 12px;
        }

        .breadcrumb .current {
            color: var(--text-sub);
            max-width: 300px;
            overflow: hidden;
            text-overflow: ellipsis;
            white-space: nowrap;
        }

        .article-card {
            max-width: 864px;
            margin: 0 auto;
            background: var(--bg-panel);
            border: 1px solid var(--border);
            border-radius: 20px;
            box-shadow: var(--shadow-card);
            overflow: hidden;
            position: relative;
        }

        .article-header {
            position: relative;
            padding: 48px 72px 28px;
        }

        .article-header::before {
            content: "";
            position: absolute;
            inset: 0;
            background: url("/assets/images/backpic/back-1.webp") center / cover no-repeat;
            opacity: 0.06;
            z-index: 0;
        }

        .article-header-inner {
            position: relative;
            z-index: 1;
        }

        .article-category-tag {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 4px 12px;
            border-radius: 4px;
            border: 1px solid rgba(200, 245, 74, 0.4);
            color: var(--accent);
            font-size: 12px;
            font-weight: 600;
            letter-spacing: 0.5px;
            margin-bottom: 16px;
        }

        .article-title {
            font-size: clamp(26px, 4vw, 38px);
            font-weight: 700;
            line-height: 1.3;
            letter-spacing: -0.3px;
            margin-bottom: 16px;
            color: var(--text-main);
            word-break: break-word;
        }

        .article-meta {
            display: flex;
            align-items: center;
            flex-wrap: wrap;
            gap: 9px;
            font-size: 13px;
            color: var(--text-muted);
        }

        .meta-item {
            color: var(--text-sub);
        }

        .meta-dot {
            color: #3a4550;
            font-size: 12px;
        }

        .article-excerpt {
            margin-top: 24px;
            padding: 14px 20px;
            border-left: 3px solid var(--accent);
            background: var(--accent-soft);
            border-radius: 0 12px 12px 0;
            color: var(--text-sub);
            font-size: 14px;
            line-height: 1.7;
        }

        .article-body {
            padding: 8px 72px 48px;
            font-size: 16px;
            line-height: 1.8;
            color: #D8E0E6;
        }

        .article-body > :first-child {
            margin-top: 0;
        }

        .article-body p {
            margin-bottom: 20px;
        }

        .article-body h2 {
            font-size: 24px;
            font-weight: 700;
            color: var(--text-main);
            margin: 40px 0 16px;
            padding-left: 16px;
            border-left: 3px solid var(--accent);
            line-height: 1.4;
        }

        .article-body h3 {
            font-size: 20px;
            font-weight: 600;
            color: var(--text-main);
            margin: 32px 0 14px;
        }

        .article-body h4 {
            font-size: 17px;
            font-weight: 600;
            color: var(--accent);
            margin: 24px 0 12px;
        }

        .article-body ul,
        .article-body ol {
            margin: 0 0 20px;
            padding-left: 24px;
        }

        .article-body li {
            margin-bottom: 8px;
            line-height: 1.7;
        }

        .article-body a {
            color: var(--accent);
            border-bottom: 1px solid rgba(200, 245, 74, 0.3);
            transition: border-color 0.2s ease, color 0.2s ease;
        }

        .article-body a:hover {
            border-color: var(--accent);
            color: #dff97a;
        }

        .article-body blockquote {
            margin: 24px 0;
            padding: 16px 24px;
            border-left: 3px solid var(--accent);
            background: rgba(200, 245, 74, 0.05);
            border-radius: 0 12px 12px 0;
            color: var(--text-sub);
            font-size: 15px;
            line-height: 1.7;
        }

        .article-body img {
            max-width: 100%;
            height: auto;
            border-radius: 12px;
            margin: 24px auto;
            display: block;
            filter: saturate(0.85) contrast(1.05);
        }

        .article-body figure {
            margin: 24px 0;
        }

        .article-body figcaption {
            text-align: center;
            font-size: 13px;
            color: var(--text-muted);
            margin-top: 8px;
        }

        .article-body table {
            width: 100%;
            border-collapse: collapse;
            margin: 24px 0;
            font-size: 14px;
        }

        .article-body th,
        .article-body td {
            border: 1px solid var(--border);
            padding: 10px 14px;
            text-align: left;
        }

        .article-body th {
            background: var(--bg-panel-light);
            color: var(--accent);
            font-weight: 600;
        }

        .article-body code {
            background: #1e2935;
            padding: 2px 6px;
            border-radius: 4px;
            font-family: "SF Mono", Consolas, monospace;
            font-size: 14px;
        }

        .article-body pre {
            background: #111820;
            border: 1px solid var(--border);
            border-radius: 12px;
            padding: 16px 20px;
            overflow-x: auto;
            margin: 24px 0;
            line-height: 1.6;
        }

        .article-body pre code {
            background: transparent;
            padding: 0;
        }

        .article-body video,
        .article-body iframe {
            max-width: 100%;
            border-radius: 12px;
            border: none;
        }

        .article-brand-banner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 32px;
            margin-top: 48px;
            background: linear-gradient(135deg, rgba(200, 245, 74, 0.08) 0%, rgba(18, 24, 33, 0.4) 60%);
            border: 1px solid var(--border);
            border-radius: var(--radius-lg);
            padding: 24px;
            overflow: hidden;
        }

        .brand-banner-content {
            flex: 1;
        }

        .brand-banner-content h3 {
            font-size: 21px;
            font-weight: 700;
            margin-bottom: 6px;
            color: var(--text-main);
        }

        .brand-banner-content p {
            font-size: 14px;
            color: var(--text-sub);
            margin-bottom: 14px;
            line-height: 1.6;
        }

        .brand-banner-icon {
            margin-bottom: 12px;
            color: var(--accent);
        }

        .brand-banner-img {
            width: 180px;
            height: 120px;
            object-fit: cover;
            border-radius: 12px;
            filter: saturate(0.85) contrast(1.05);
            box-shadow: 0 10px 30px rgba(0, 0, 0, 0.35);
            flex-shrink: 0;
        }

        .article-nav-bottom {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 16px;
            margin-top: 40px;
            padding-top: 32px;
            border-top: 1px solid var(--border);
        }

        .article-nav-card {
            display: block;
            background: var(--bg-panel-light);
            border: 1px solid var(--border);
            border-radius: var(--radius-md);
            padding: 20px 24px;
            text-decoration: none;
            transition: transform 0.2s ease, box-shadow 0.2s ease, border-color 0.2s ease;
        }

        .article-nav-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-hover);
            border-color: rgba(200, 245, 74, 0.25);
        }

        .nav-card-label {
            display: block;
            font-size: 12px;
            color: var(--text-muted);
            letter-spacing: 0.5px;
            margin-bottom: 6px;
            font-weight: 500;
        }

        .nav-card-title {
            display: block;
            font-size: 15px;
            font-weight: 600;
            color: var(--text-main);
            transition: color 0.2s ease;
        }

        .article-nav-card:hover .nav-card-title {
            color: var(--accent);
        }

        .article-not-found {
            text-align: center;
            padding: 80px 20px 60px;
        }

        .not-found-code {
            display: block;
            font-family: var(--font-num);
            font-size: 64px;
            font-weight: 600;
            color: var(--accent);
            line-height: 1;
            margin-bottom: 16px;
        }

        .article-not-found h2 {
            font-size: 26px;
            font-weight: 700;
            margin-bottom: 12px;
            color: var(--text-main);
        }

        .article-not-found p {
            color: var(--text-sub);
            margin-bottom: 28px;
        }

        .site-footer {
            background: #080B0F;
            border-top: 1px solid rgba(200, 245, 74, 0.2);
            padding: 72px 0 32px;
            margin-top: 40px;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 1.4fr 1fr 1fr 1.2fr;
            gap: 48px;
            margin-bottom: 56px;
        }

        .footer-brand .logo {
            margin-bottom: 16px;
        }

        .footer-brand p {
            font-size: 13px;
            color: var(--text-sub);
            line-height: 1.7;
            margin-bottom: 16px;
            max-width: 280px;
        }

        .footer-icp {
            display: inline-block;
            font-size: 12px;
            color: var(--text-muted);
            border: 1px solid var(--border);
            padding: 4px 10px;
            border-radius: 4px;
        }

        .footer-col h4 {
            font-size: 14px;
            font-weight: 600;
            color: var(--text-main);
            margin-bottom: 18px;
            letter-spacing: 0.3px;
        }

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

        .footer-col ul li {
            margin-bottom: 10px;
        }

        .footer-col ul li a {
            font-size: 13px;
            color: var(--text-sub);
            transition: color 0.2s ease, padding-left 0.2s ease;
        }

        .footer-col ul li a:hover {
            color: var(--accent);
            padding-left: 4px;
        }

        .contact-item {
            font-size: 13px;
            color: var(--text-sub);
            margin-bottom: 10px;
            line-height: 1.6;
        }

        .footer-bottom {
            display: flex;
            align-items: center;
            flex-wrap: wrap;
            gap: 12px;
            padding-top: 32px;
            border-top: 1px solid var(--border);
            font-size: 13px;
            color: var(--text-muted);
        }

        .footer-bottom .dot {
            color: #3a4550;
        }

        @media (max-width: 992px) {
            .header-actions {
                gap: 8px;
            }
            .header-actions .btn-border {
                display: none;
            }
            .nav-link {
                padding: 8px 12px;
                font-size: 12px;
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 40px;
            }
            .article-header,
            .article-body {
                padding-left: 48px;
                padding-right: 48px;
            }
        }

        @media (max-width: 768px) {
            .site-header {
                height: 58px;
            }
            .header-inner {
                height: 58px;
            }
            .header-actions {
                display: none;
            }
            .nav-toggle {
                display: flex;
            }
            .main-nav {
                position: fixed;
                top: 58px;
                right: 0;
                bottom: 0;
                width: 72%;
                max-width: 320px;
                flex-direction: column;
                align-items: flex-start;
                padding: 32px 24px;
                gap: 4px;
                background: rgba(10, 14, 18, 0.98);
                border-left: 1px solid var(--border);
                box-shadow: -20px 0 40px rgba(0, 0, 0, 0.5);
                transform: translateX(100%);
                transition: transform 0.3s ease;
                margin: 0;
                overflow-y: auto;
                z-index: 99;
            }
            .main-nav.open {
                transform: translateX(0);
            }
            .nav-link {
                width: 100%;
                font-size: 15px;
                padding: 12px 16px;
                color: var(--text-sub);
                border-left: 2px solid transparent;
            }
            .nav-link:hover {
                background: rgba(255, 255, 255, 0.04);
                color: #fff;
                border-left-color: var(--accent);
            }
            .nav-link.active::after {
                display: none;
            }
            .nav-link.active {
                color: var(--accent);
                background: rgba(200, 245, 74, 0.06);
                border-left-color: var(--accent);
            }
            .article-main {
                padding: 80px 0 64px;
            }
            .breadcrumb {
                padding: 0 16px;
            }
            .article-card {
                border-radius: 0;
                border-left: none;
                border-right: none;
                border-top: none;
                box-shadow: none;
            }
            .article-header,
            .article-body {
                padding-left: 20px;
                padding-right: 20px;
            }
            .article-header {
                padding-top: 36px;
            }
            .article-title {
                font-size: 24px;
                line-height: 1.35;
            }
            .article-brand-banner {
                flex-direction: column;
                align-items: flex-start;
                gap: 16px;
            }
            .brand-banner-img {
                width: 100%;
                height: 150px;
            }
            .article-nav-bottom {
                grid-template-columns: 1fr;
                gap: 12px;
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 32px;
            }
            .footer-brand {
                grid-column: 1 / -1;
            }
        }

        @media (max-width: 576px) {
            .container {
                padding: 0 16px;
            }
            .logo-text {
                font-size: 15px;
            }
            .logo-mark {
                width: 26px;
                height: 26px;
                font-size: 15px;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 28px;
            }
            .footer-bottom {
                flex-direction: column;
                align-items: flex-start;
                gap: 6px;
            }
            .footer-bottom .dot {
                display: none;
            }
            .article-meta {
                flex-wrap: wrap;
            }
            .article-excerpt {
                font-size: 13px;
                padding: 12px 16px;
            }
            .article-body {
                font-size: 15px;
            }
            .article-body h2 {
                font-size: 21px;
            }
            .article-body h3 {
                font-size: 18px;
            }
            .brand-banner-content h3 {
                font-size: 18px;
            }
            .nav-card-title {
                font-size: 14px;
            }
        }

        @media (prefers-reduced-motion: reduce) {
            *,
            *::before,
            *::after {
                animation-duration: 0.01ms !important;
                animation-iteration-count: 1 !important;
                transition-duration: 0.01ms !important;
            }
            html {
                scroll-behavior: auto;
            }
        }

/* roulang page: category2 */
:root {
  --bg-base: #0A0E12;
  --bg-panel: #121821;
  --bg-panel-light: #1A2330;
  --accent: #C8F54A;
  --accent-secondary: #F5A524;
  --text-main: #F2F6F8;
  --text-sub: #8B98A5;
  --text-weak: #5B6672;
  --border: rgba(255,255,255,0.08);
  --border-strong: #2A3540;
  --radius-lg: 16px;
  --radius-md: 8px;
  --radius-sm: 4px;
  --shadow-card: 0 6px 20px rgba(0,0,0,0.25);
  --shadow-hover: 0 16px 40px rgba(0,0,0,0.45), 0 0 0 1px rgba(200,245,74,0.10);
  --shadow-glow: 0 0 18px rgba(200,245,74,0.25);
  --spacing-section: 96px;
  --font-main: "PingFang SC", "Noto Sans SC", "Microsoft YaHei", sans-serif;
  --font-num: "Barlow Condensed", "DIN Alternate", sans-serif;
}
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}
html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}
body {
  font-family: var(--font-main);
  background: var(--bg-base);
  color: var(--text-main);
  line-height: 1.7;
  font-size: 15px;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}
img {
  display: block;
  max-width: 100%;
  height: auto;
}
a {
  color: inherit;
  text-decoration: none;
  transition: color 0.2s ease;
}
button {
  font-family: inherit;
  cursor: pointer;
  border: none;
  background: none;
}
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}
.container.narrow {
  max-width: 840px;
}

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  height: 48px;
  padding: 0 28px;
  font-size: 14px;
  font-weight: 600;
  letter-spacing: 0.3px;
  border-radius: var(--radius-md);
  white-space: nowrap;
  transition: transform 0.2s ease, box-shadow 0.2s ease, background 0.2s ease, border-color 0.2s ease;
}
.btn-primary {
  background: var(--accent);
  color: #0A0E12;
  box-shadow: 0 4px 16px rgba(200,245,74,0.15);
}
.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(200,245,74,0.30);
}
.btn-ghost {
  background: transparent;
  border: 1px solid rgba(255,255,255,0.25);
  color: var(--text-main);
}
.btn-ghost:hover {
  border-color: var(--accent);
  color: var(--accent);
  transform: translateY(-2px);
  box-shadow: var(--shadow-glow);
}
.btn-sm {
  height: 38px;
  padding: 0 20px;
  font-size: 13px;
}
.btn-lg {
  height: 54px;
  padding: 0 42px;
  font-size: 15px;
}
.btn:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
}

/* ---------- Header / Nav ---------- */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  height: 64px;
  background: rgba(10,14,18,0.85);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid rgba(200,245,74,0.18);
}
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
}
.logo {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
}
.logo-mark {
  width: 28px;
  height: 28px;
  border-radius: 6px;
  background: var(--accent);
  color: #0A0E12;
  font-weight: 800;
  font-size: 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 0 12px rgba(200,245,74,0.35);
}
.logo-text {
  font-size: 17px;
  font-weight: 700;
  color: var(--text-main);
  letter-spacing: 0.2px;
}
.logo-text em {
  font-style: normal;
  color: var(--accent);
}
.main-nav {
  display: flex;
  align-items: center;
  gap: 6px;
}
.nav-link {
  display: inline-flex;
  align-items: center;
  height: 64px;
  padding: 0 20px;
  font-size: 14px;
  font-weight: 500;
  color: var(--text-sub);
  letter-spacing: 0.3px;
  position: relative;
  transition: color 0.2s ease;
}
.nav-link::after {
  content: "";
  position: absolute;
  left: 18px;
  right: 18px;
  bottom: -1px;
  height: 2px;
  background: linear-gradient(90deg, var(--accent), rgba(200,245,74,0.1));
  opacity: 0;
  transition: opacity 0.2s ease;
}
.nav-link:hover {
  color: #fff;
}
.nav-link:hover::after {
  opacity: 0.6;
}
.nav-link.active {
  color: #fff;
}
.nav-link.active::after {
  opacity: 1;
  box-shadow: 0 0 18px rgba(200,245,74,0.25);
  animation: breath 3s ease-in-out infinite;
}
@keyframes breath {
  0%, 100% { opacity: 0.8; }
  50% { opacity: 1; }
}
.header-actions {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-shrink: 0;
}
.nav-toggle {
  display: none;
  width: 40px;
  height: 40px;
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  align-items: center;
  justify-content: center;
  gap: 5px;
  flex-direction: column;
  background: var(--bg-panel);
}
.nav-toggle span {
  display: block;
  width: 20px;
  height: 2px;
  background: var(--text-main);
  border-radius: 2px;
  transition: transform 0.25s ease, opacity 0.25s ease;
}
.nav-toggle.active span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}
.nav-toggle.active span:nth-child(2) {
  opacity: 0;
}
.nav-toggle.active span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* ---------- Page Hero ---------- */
.page-hero {
  position: relative;
  min-height: 520px;
  display: flex;
  align-items: center;
  padding: 120px 0 60px;
  overflow: hidden;
  background-image: url('/assets/images/backpic/back-1.webp');
  background-size: cover;
  background-position: center 30%;
}
.page-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(120deg, rgba(10,14,18,0.94) 0%, rgba(10,14,18,0.82) 48%, rgba(200,245,74,0.05) 100%);
  z-index: 1;
}
.page-hero::after {
  content: "";
  position: absolute;
  top: 0;
  right: 0;
  width: 320px;
  height: 320px;
  background: radial-gradient(circle, rgba(200,245,74,0.08) 0%, transparent 70%);
  z-index: 1;
}
.page-hero .container {
  position: relative;
  z-index: 2;
}
.breadcrumb {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px;
  font-size: 13px;
  color: var(--text-sub);
  margin-bottom: 36px;
}
.breadcrumb a {
  color: var(--text-sub);
  transition: color 0.2s ease;
}
.breadcrumb a:hover {
  color: var(--accent);
}
.breadcrumb .sep {
  color: var(--text-weak);
}
.breadcrumb .current {
  color: var(--text-main);
  font-weight: 500;
}
.page-hero h1 {
  font-size: clamp(36px, 5vw, 54px);
  font-weight: 800;
  line-height: 1.15;
  letter-spacing: -0.3px;
  margin-bottom: 16px;
}
.page-hero .hero-desc {
  font-size: 16px;
  color: var(--text-sub);
  line-height: 1.65;
  max-width: 560px;
  margin-bottom: 32px;
}
.hero-actions {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 16px;
}
.hero-scroll-line {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 40px;
  display: flex;
  justify-content: center;
  z-index: 2;
}
.hero-scroll-line::before {
  content: "";
  width: 1px;
  height: 40px;
  background: linear-gradient(to bottom, var(--accent), transparent);
  animation: scrollPulse 2.4s ease-in-out infinite;
}
@keyframes scrollPulse {
  0%, 100% { transform: scaleY(0.6); opacity: 0.5; }
  50% { transform: scaleY(1); opacity: 1; }
}

/* ---------- Section base ---------- */
.section {
  padding: var(--spacing-section) 0;
}
.section-tight {
  padding: 56px 0;
}
.section-heading {
  margin-bottom: 44px;
}
.section-heading h2 {
  font-size: clamp(26px, 3vw, 36px);
  font-weight: 700;
  letter-spacing: -0.2px;
  line-height: 1.25;
  position: relative;
  padding-left: 24px;
}
.section-heading h2::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.18em;
  width: 4px;
  height: 0.85em;
  background: var(--accent);
  border-radius: 2px;
  box-shadow: 0 0 12px rgba(200,245,74,0.4);
}
.section-heading .sub {
  margin-top: 10px;
  font-size: 14px;
  color: var(--text-sub);
  max-width: 640px;
}

/* ---------- Overview article ---------- */
.category-article {
  padding: 72px 0 32px;
}
.article-body-copy p {
  font-size: 15px;
  line-height: 1.75;
  color: var(--text-sub);
  margin-bottom: 20px;
}
.article-body-copy p strong {
  color: var(--text-main);
  font-weight: 600;
}
.article-figure {
  margin: 36px 0 8px;
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--border);
}
.article-figure img {
  width: 100%;
  aspect-ratio: 16 / 9;
  object-fit: cover;
  filter: saturate(0.85) contrast(1.05);
}
.figure-caption {
  padding: 12px 18px;
  font-size: 13px;
  color: var(--text-weak);
  background: var(--bg-panel);
  border-top: 1px solid var(--border);
}

/* ---------- Guard list ---------- */
.guard-list-section {
  padding: 48px 0 72px;
}
.guard-list {
  list-style: none;
}
.guard-item {
  display: flex;
  align-items: flex-start;
  gap: 32px;
  padding: 36px 0;
  border-bottom: 1px solid var(--border);
  transition: background 0.25s ease;
}
.guard-item:first-child {
  padding-top: 8px;
}
.guard-item:last-child {
  border-bottom: none;
}
.guard-num {
  font-family: var(--font-num);
  font-size: 44px;
  font-weight: 600;
  line-height: 1;
  color: var(--accent);
  min-width: 76px;
  letter-spacing: 0.5px;
}
.guard-content h3 {
  font-size: 19px;
  font-weight: 600;
  margin-bottom: 10px;
}
.guard-content p {
  font-size: 14px;
  line-height: 1.7;
  color: var(--text-sub);
  max-width: 560px;
}
.guard-content h3::after {
  content: "";
  display: block;
  width: 40px;
  height: 2px;
  background: linear-gradient(90deg, var(--accent), transparent);
  margin-top: 10px;
}

/* ---------- Flow section ---------- */
.flow-section {
  padding: 64px 0;
  background: linear-gradient(180deg, transparent, rgba(18,24,33,0.5) 30%, rgba(18,24,33,0.5) 70%, transparent);
}
.flow-steps {
  counter-reset: step;
}
.flow-step {
  display: grid;
  grid-template-columns: 68px 1fr 40px;
  gap: 24px;
  align-items: start;
  padding: 26px 0;
  border-bottom: 1px dashed rgba(200,245,74,0.18);
}
.flow-step:last-child {
  border-bottom: none;
}
.flow-index {
  font-family: var(--font-num);
  font-size: 36px;
  font-weight: 600;
  color: var(--accent);
  line-height: 1;
  display: flex;
  align-items: center;
  gap: 10px;
}
.flow-index::after {
  content: "";
  width: 20px;
  height: 1px;
  background: rgba(200,245,74,0.4);
}
.flow-body h3 {
  font-size: 17px;
  font-weight: 600;
  margin-bottom: 6px;
}
.flow-body p {
  font-size: 14px;
  color: var(--text-sub);
  line-height: 1.65;
}
.flow-arrow {
  color: var(--accent);
  font-size: 22px;
  opacity: 0.5;
  justify-self: end;
  align-self: center;
}

/* ---------- Scenarios ---------- */
.scenario-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
}
.scenario-card {
  background: var(--bg-panel);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 32px;
  transition: transform 0.25s ease, box-shadow 0.25s ease, border-color 0.25s ease;
}
.scenario-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-hover);
  border-color: rgba(200,245,74,0.15);
}
.scenario-icon {
  width: 44px;
  height: 44px;
  border-radius: 10px;
  background: rgba(200,245,74,0.1);
  border: 1px solid rgba(200,245,74,0.2);
  color: var(--accent);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 20px;
  font-weight: 700;
  margin-bottom: 22px;
}
.scenario-card h3 {
  font-size: 18px;
  font-weight: 600;
  margin-bottom: 12px;
}
.scenario-card p {
  font-size: 14px;
  color: var(--text-sub);
  line-height: 1.7;
}

/* ---------- FAQ ---------- */
.faq-section {
  padding: var(--spacing-section) 0 64px;
}
.faq-list {
  max-width: 760px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 14px;
}
.faq-item {
  background: var(--bg-panel);
  border: 1px solid rgba(255,255,255,0.06);
  border-radius: 12px;
  transition: border-color 0.25s ease, box-shadow 0.25s ease;
}
.faq-item:hover {
  border-color: rgba(200,245,74,0.15);
}
.faq-item[open] {
  border-color: rgba(200,245,74,0.3);
  box-shadow: 0 0 0 1px rgba(200,245,74,0.06);
}
.faq-item summary {
  list-style: none;
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 22px 22px 22px 24px;
  cursor: pointer;
  font-size: 16px;
  font-weight: 600;
  color: var(--text-main);
  position: relative;
}
.faq-item summary::-webkit-details-marker {
  display: none;
}
.faq-item summary::before {
  content: "?";
  width: 24px;
  height: 24px;
  border: 1px solid rgba(200,245,74,0.4);
  border-radius: 6px;
  color: var(--accent);
  font-size: 13px;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}
.faq-item summary::after {
  content: "+";
  width: 24px;
  height: 24px;
  border: 1px solid rgba(255,255,255,0.2);
  border-radius: 50%;
  color: var(--text-sub);
  font-size: 16px;
  font-weight: 500;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-left: auto;
  flex-shrink: 0;
  transition: transform 0.3s ease, background 0.3s ease, color 0.3s ease;
}
.faq-item[open] summary::after {
  transform: rotate(45deg);
  background: rgba(200,245,74,0.12);
  color: var(--accent);
  border-color: var(--accent);
}
.faq-answer {
  padding: 0 24px 24px 64px;
  font-size: 14px;
  color: var(--text-sub);
  line-height: 1.75;
}

/* ---------- CTA ---------- */
.cta-section {
  position: relative;
  padding: 96px 0;
  overflow: hidden;
  background-image: url('/assets/images/backpic/back-3.png');
  background-size: cover;
  background-position: center;
}
.cta-section::before {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(10,14,18,0.96) 20%, rgba(10,14,18,0.82) 60%, rgba(200,245,74,0.06) 100%);
  z-index: 1;
}
.cta-section::after {
  content: "";
  position: absolute;
  top: -80px;
  right: 8%;
  width: 260px;
  height: 260px;
  border: 1px solid rgba(200,245,74,0.25);
  border-radius: 50%;
  box-shadow: 0 0 60px rgba(200,245,74,0.12);
  z-index: 2;
}
.cta-inner {
  position: relative;
  z-index: 3;
  text-align: center;
  max-width: 640px;
  margin: 0 auto;
}
.cta-inner h2 {
  font-size: clamp(28px, 3vw, 36px);
  font-weight: 700;
  margin-bottom: 14px;
}
.cta-inner p {
  font-size: 15px;
  color: var(--text-sub);
  margin-bottom: 32px;
}

/* ---------- Page exits ---------- */
.page-exits {
  padding: 56px 0 72px;
  border-top: 1px solid var(--border);
}
.page-exits .container {
  display: flex;
  justify-content: center;
  gap: 16px;
  flex-wrap: wrap;
}

/* ---------- Footer ---------- */
.site-footer {
  background: #080B0F;
  border-top: 1px solid rgba(200,245,74,0.20);
  padding: 64px 0 28px;
}
.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1.2fr;
  gap: 40px;
  margin-bottom: 44px;
}
.footer-brand .logo {
  margin-bottom: 14px;
}
.footer-brand p {
  font-size: 13px;
  color: var(--text-sub);
  line-height: 1.6;
  margin-bottom: 12px;
}
.footer-icp {
  display: block;
  font-size: 12px;
  color: var(--text-weak);
}
.footer-col h4 {
  font-size: 14px;
  font-weight: 600;
  margin-bottom: 16px;
  color: var(--text-main);
}
.footer-col ul {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.footer-col ul a {
  font-size: 13px;
  color: var(--text-sub);
  transition: color 0.2s ease;
}
.footer-col ul a:hover {
  color: var(--accent);
}
.contact-item {
  font-size: 13px;
  color: var(--text-sub);
  margin-bottom: 8px;
  line-height: 1.5;
}
.footer-bottom {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding-top: 24px;
  border-top: 1px solid var(--border);
  font-size: 13px;
  color: var(--text-weak);
}
.footer-bottom .dot {
  color: var(--text-weak);
}

/* ---------- Reveal animation ---------- */
html.js .reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}
html.js .reveal.reveal-visible {
  opacity: 1;
  transform: none;
}

/* ---------- Responsive ---------- */
@media (max-width: 1200px) {
  .container {
    padding: 0 32px;
  }
}
@media (max-width: 992px) {
  .footer-grid {
    grid-template-columns: 1fr 1fr;
    gap: 32px;
  }
  .footer-brand {
    grid-column: 1 / -1;
  }
  .scenario-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .nav-link {
    padding: 0 14px;
    font-size: 13px;
  }
  .header-actions .btn-sm {
    padding: 0 14px;
  }
}
@media (max-width: 768px) {
  :root {
    --spacing-section: 64px;
  }
  .container {
    padding: 0 20px;
  }
  .nav-toggle {
    display: flex;
  }
  .main-nav {
    position: fixed;
    top: 64px;
    right: 0;
    bottom: 0;
    width: 78%;
    max-width: 340px;
    background: rgba(10,14,18,0.98);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    flex-direction: column;
    align-items: flex-start;
    justify-content: flex-start;
    gap: 0;
    padding: 24px 28px;
    border-left: 1px solid var(--border);
    box-shadow: -20px 0 60px rgba(0,0,0,0.5);
    transform: translateX(100%);
    transition: transform 0.35s ease;
    overflow-y: auto;
  }
  .main-nav.open {
    transform: translateX(0);
  }
  .nav-link {
    width: 100%;
    height: 48px;
    padding: 0 16px;
    font-size: 15px;
    border-left: 2px solid transparent;
    border-radius: 0;
  }
  .nav-link::after {
    display: none;
  }
  .nav-link:hover,
  .nav-link.active {
    border-left-color: var(--accent);
    background: rgba(200,245,74,0.04);
  }
  .header-actions {
    margin-left: auto;
    margin-right: 12px;
  }
  .page-hero {
    min-height: 480px;
    padding: 100px 0 48px;
  }
  .guard-item {
    gap: 18px;
  }
  .guard-num {
    font-size: 32px;
    min-width: 52px;
  }
  .flow-step {
    grid-template-columns: 48px 1fr;
    gap: 14px;
  }
  .flow-arrow {
    display: none;
  }
  .cta-section {
    padding: 72px 0;
  }
  .page-exits {
    padding: 40px 0 56px;
  }
}
@media (max-width: 576px) {
  .container {
    padding: 0 16px;
  }
  .scenario-grid {
    grid-template-columns: 1fr;
  }
  .footer-grid {
    grid-template-columns: 1fr;
  }
  .footer-brand {
    grid-column: auto;
  }
  .btn {
    height: 44px;
    padding: 0 22px;
  }
  .btn-lg {
    height: 48px;
    padding: 0 32px;
  }
  .page-hero h1 {
    font-size: 34px;
  }
  .hero-actions {
    flex-direction: column;
    align-items: stretch;
  }
  .hero-actions .btn {
    width: 100%;
  }
  .guard-item {
    flex-direction: column;
    gap: 10px;
    padding: 28px 0;
  }
  .guard-num {
    font-size: 28px;
  }
  .flow-index {
    font-size: 30px;
  }
  .faq-item summary {
    padding: 18px 16px;
    font-size: 15px;
  }
  .faq-answer {
    padding: 0 16px 20px 56px;
  }
  .cta-inner h2 {
    font-size: 26px;
  }
}
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation: none !important;
    transition: none !important;
    scroll-behavior: auto !important;
  }
  html.js .reveal {
    opacity: 1;
    transform: none;
  }
}

/* roulang page: category3 */
:root {
  --bg-base: #0A0E12;
  --bg-panel: #121821;
  --bg-panel-hover: #1A2330;
  --accent: #C8F54A;
  --accent-secondary: #F5A524;
  --text-main: #F2F6F8;
  --text-sub: #8B98A5;
  --text-muted: #5B6672;
  --border: rgba(255, 255, 255, 0.08);
  --border-strong: #2A3540;
  --radius-lg: 16px;
  --radius-md: 8px;
  --radius-sm: 4px;
  --shadow-card: 0 6px 20px rgba(0, 0, 0, 0.25);
  --shadow-hover: 0 16px 40px rgba(0, 0, 0, 0.45), 0 0 0 1px rgba(200, 245, 74, 0.10);
  --glow-accent: 0 0 18px rgba(200, 245, 74, 0.25);
  --spacing-section: 96px;
  --container: 1200px;
  --font-main: "PingFang SC", "Noto Sans SC", "Microsoft YaHei", sans-serif;
  --font-num: "Barlow Condensed", "DIN Alternate", sans-serif;
}
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}
html {
  scroll-behavior: smooth;
}
body {
  font-family: var(--font-main);
  font-size: 15px;
  line-height: 1.7;
  background: var(--bg-base);
  color: var(--text-main);
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}
img {
  max-width: 100%;
  display: block;
  border: 0;
}
a {
  color: inherit;
  text-decoration: none;
  transition: color .2s ease;
}
button {
  font-family: inherit;
  border: none;
  background: none;
  cursor: pointer;
  color: inherit;
}
input, textarea {
  font-family: inherit;
  border: none;
  outline: none;
  background: transparent;
  color: var(--text-main);
}
.container {
  max-width: var(--container);
  margin: 0 auto;
  padding-left: 24px;
  padding-right: 24px;
}
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  height: 64px;
  background: rgba(10, 14, 18, 0.85);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
}
.site-header::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(90deg, var(--accent), transparent);
  opacity: 0.8;
}
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
}
.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
}
.logo-mark {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 28px;
  height: 28px;
  border-radius: var(--radius-sm);
  background: var(--accent);
  color: var(--bg-base);
  font-weight: 800;
  font-size: 16px;
  line-height: 1;
}
.logo-text {
  font-size: 17px;
  font-weight: 700;
  letter-spacing: -0.2px;
  color: var(--text-main);
  line-height: 1.2;
}
.logo-text em {
  font-style: normal;
  color: var(--accent);
  font-weight: 600;
  font-size: 13px;
  margin-left: 2px;
}
.main-nav {
  display: flex;
  align-items: center;
  gap: 4px;
}
.nav-link {
  display: block;
  padding: 8px 14px;
  font-size: 13px;
  font-weight: 500;
  letter-spacing: 0.3px;
  color: var(--text-sub);
  border-radius: var(--radius-md);
  position: relative;
  transition: color .2s ease;
}
.nav-link:hover {
  color: var(--text-main);
}
.nav-link:hover::after {
  opacity: 1;
  transform: scaleX(1);
}
.nav-link::after {
  content: "";
  position: absolute;
  left: 14px;
  right: 14px;
  bottom: 2px;
  height: 2px;
  background: linear-gradient(90deg, var(--accent), rgba(200, 245, 74, 0.3));
  border-radius: 2px;
  opacity: 0;
  transform: scaleX(0);
  transition: opacity .3s, transform .3s;
}
.nav-link.active {
  color: var(--text-main);
  font-weight: 600;
}
.nav-link.active::after {
  opacity: 0.85;
  transform: scaleX(1);
  box-shadow: var(--glow-accent);
  animation: breathe 3s ease-in-out infinite;
}
@keyframes breathe {
  0%, 100% { opacity: 0.85; }
  50% { opacity: 1; }
}
.header-actions {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-shrink: 0;
}
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-md);
  font-size: 14px;
  font-weight: 600;
  padding: 12px 28px;
  height: 48px;
  transition: all .2s ease;
  border: 1px solid transparent;
  line-height: 1;
  white-space: nowrap;
}
.btn-primary {
  background: var(--accent);
  color: var(--bg-base);
}
.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(200, 245, 74, 0.30);
}
.btn-outline {
  background: transparent;
  border-color: var(--border-strong);
  color: var(--text-main);
}
.btn-outline:hover {
  border-color: var(--accent);
  color: var(--accent);
  transform: translateY(-2px);
}
.btn-sm {
  height: 38px;
  padding: 0 20px;
  font-size: 13px;
}
.btn-lg {
  height: 54px;
  padding: 0 40px;
  font-size: 16px;
}
.btn-block {
  display: flex;
  width: 100%;
}
.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 6px;
  width: 40px;
  height: 40px;
  padding: 8px;
  border-radius: var(--radius-md);
  border: 1px solid var(--border);
  background: var(--bg-panel);
}
.nav-toggle span {
  display: block;
  height: 2px;
  width: 100%;
  background: var(--text-main);
  border-radius: 2px;
  transition: all .3s ease;
}
.nav-toggle.active span:nth-child(1) {
  transform: translateY(4px) rotate(45deg);
}
.nav-toggle.active span:nth-child(2) {
  transform: translateY(-4px) rotate(-45deg);
}
.mobile-menu {
  position: fixed;
  top: 64px;
  right: 0;
  bottom: 0;
  width: 280px;
  background: rgba(10, 14, 18, 0.98);
  border-left: 1px solid var(--border);
  padding: 24px;
  transform: translateX(100%);
  transition: transform .35s ease;
  z-index: 99;
  backdrop-filter: blur(16px);
}
.mobile-menu.open {
  transform: translateX(0);
}
.mobile-nav {
  display: flex;
  flex-direction: column;
  gap: 4px;
}
.mobile-nav .nav-link {
  display: block;
  padding: 14px 12px;
  font-size: 15px;
  color: var(--text-sub);
  border-radius: var(--radius-md);
  border-left: 2px solid transparent;
  transition: all .2s;
}
.mobile-nav .nav-link:hover {
  color: var(--text-main);
  background: rgba(200, 245, 74, 0.05);
  border-left-color: var(--accent);
}
.mobile-nav .nav-link.active {
  color: var(--accent);
  background: rgba(200, 245, 74, 0.06);
  border-left-color: var(--accent);
}
.mobile-menu-footer {
  margin-top: 24px;
}
.hero-banner {
  position: relative;
  min-height: 440px;
  display: flex;
  align-items: center;
  padding: 140px 0 80px;
  background: url('/assets/images/backpic/back-1.webp') center / cover no-repeat;
  background-attachment: fixed;
}
.hero-banner::before {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(120deg, rgba(10, 14, 18, 0.94) 0%, rgba(10, 14, 18, 0.80) 45%, rgba(200, 245, 74, 0.06) 100%);
}
.hero-banner .container {
  position: relative;
  z-index: 2;
  max-width: 900px;
  margin: 0 auto;
  text-align: center;
}
.breadcrumb {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  font-size: 13px;
  color: var(--text-muted);
  margin-bottom: 28px;
}
.breadcrumb a {
  color: var(--text-sub);
  transition: color .2s;
}
.breadcrumb a:hover {
  color: var(--accent);
}
.breadcrumb .sep {
  color: var(--text-muted);
}
.breadcrumb .current {
  color: var(--accent);
  font-weight: 500;
}
.page-title {
  font-size: clamp(40px, 5vw, 56px);
  font-weight: 800;
  letter-spacing: -0.3px;
  line-height: 1.15;
  margin-bottom: 16px;
  background: linear-gradient(135deg, var(--text-main) 0%, var(--text-main) 60%, var(--accent) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.page-subtitle {
  font-size: 16px;
  color: var(--text-sub);
  margin-bottom: 36px;
  max-width: 560px;
  margin-left: auto;
  margin-right: auto;
}
.hero-ctas {
  display: flex;
  justify-content: center;
  gap: 16px;
  flex-wrap: wrap;
}
.section {
  padding: var(--spacing-section) 0;
}
.section-tight {
  padding: 64px 0;
}
.section-head {
  text-align: center;
  margin-bottom: 56px;
}
.section-kicker {
  display: inline-block;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 1.5px;
  text-transform: uppercase;
  color: var(--accent);
  background: rgba(200, 245, 74, 0.08);
  border: 1px solid rgba(200, 245, 74, 0.2);
  border-radius: 4px;
  padding: 4px 12px;
  margin-bottom: 16px;
}
.section-title {
  font-size: clamp(26px, 3vw, 36px);
  font-weight: 700;
  line-height: 1.2;
  letter-spacing: -0.3px;
  color: var(--text-main);
  margin-bottom: 12px;
}
.section-title::before {
  content: "";
  display: block;
  width: 24px;
  height: 2px;
  background: var(--accent);
  border-radius: 2px;
  margin: 0 auto 16px;
}
.section-desc {
  font-size: 15px;
  color: var(--text-sub);
  max-width: 640px;
  margin: 0 auto;
  line-height: 1.7;
}
.feature-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
  max-width: 960px;
  margin: 0 auto;
}
.feature-card {
  background: var(--bg-panel);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 32px;
  transition: all .3s ease;
  box-shadow: var(--shadow-card);
  position: relative;
  overflow: hidden;
}
.feature-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--accent), transparent);
  opacity: 0;
  transition: opacity .3s;
}
.feature-card:hover {
  background: var(--bg-panel-hover);
  transform: translateY(-4px);
  box-shadow: var(--shadow-hover);
}
.feature-card:hover::before {
  opacity: 1;
}
.feature-icon {
  width: 44px;
  height: 44px;
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(200, 245, 74, 0.10);
  border: 1px solid rgba(200, 245, 74, 0.20);
  font-size: 20px;
  font-weight: 700;
  color: var(--accent);
  margin-bottom: 20px;
}
.feature-card h3 {
  font-size: 18px;
  font-weight: 600;
  color: var(--text-main);
  margin-bottom: 10px;
  letter-spacing: -0.2px;
}
.feature-card p {
  font-size: 14px;
  color: var(--text-sub);
  line-height: 1.7;
}
.scene-section {
  background: var(--bg-panel);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}
.scene-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 56px;
  align-items: center;
  max-width: 1100px;
  margin: 0 auto;
}
.scene-image {
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-hover);
  position: relative;
}
.scene-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  filter: saturate(0.85) contrast(1.05);
  aspect-ratio: 4 / 3;
}
.scene-content h3 {
  font-size: 22px;
  font-weight: 700;
  color: var(--text-main);
  margin-bottom: 16px;
  line-height: 1.3;
}
.scene-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 16px;
}
.scene-list li {
  display: flex;
  gap: 12px;
  align-items: flex-start;
  font-size: 14px;
  color: var(--text-sub);
  line-height: 1.7;
}
.scene-list .scene-num {
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  border-radius: 8px;
  background: rgba(200, 245, 74, 0.10);
  border: 1px solid rgba(200, 245, 74, 0.20);
  color: var(--accent);
  font-weight: 700;
  font-size: 13px;
}
.scene-list .scene-text {
  padding-top: 3px;
}
.scene-list .scene-text strong {
  display: block;
  color: var(--text-main);
  font-size: 15px;
  font-weight: 600;
  margin-bottom: 2px;
}
.process-section {
  position: relative;
}
.process-steps {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  max-width: 1100px;
  margin: 0 auto;
  position: relative;
}
.process-steps::before {
  content: "";
  position: absolute;
  top: 50px;
  left: 8%;
  right: 8%;
  height: 2px;
  border-top: 2px dashed rgba(200, 245, 74, 0.25);
  z-index: 0;
}
.process-step {
  position: relative;
  z-index: 1;
  background: var(--bg-base);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 32px 24px;
  text-align: center;
  transition: all .3s ease;
  box-shadow: var(--shadow-card);
}
.process-step:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-hover);
  border-color: rgba(200, 245, 74, 0.2);
}
.process-num {
  font-family: var(--font-num);
  font-size: 48px;
  font-weight: 600;
  color: var(--accent);
  line-height: 1;
  margin-bottom: 16px;
  display: block;
  text-shadow: 0 0 20px rgba(200, 245, 74, 0.2);
}
.process-step h3 {
  font-size: 17px;
  font-weight: 600;
  color: var(--text-main);
  margin-bottom: 8px;
}
.process-step p {
  font-size: 13px;
  color: var(--text-sub);
  line-height: 1.6;
}
.faq-section {
  max-width: 760px;
  margin: 0 auto;
}
.faq-item {
  background: var(--bg-panel);
  border: 1px solid rgba(255, 255, 255, 0.06);
  border-radius: 12px;
  margin-bottom: 12px;
  overflow: hidden;
  transition: border-color .2s;
}
.faq-item.open {
  border-color: rgba(200, 245, 74, 0.2);
}
.faq-question {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 20px 24px;
  cursor: pointer;
  user-select: none;
}
.faq-icon {
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 24px;
  height: 24px;
  border-radius: 4px;
  border: 1px solid rgba(200, 245, 74, 0.3);
  color: var(--accent);
  font-size: 13px;
  font-weight: 600;
}
.faq-question h3 {
  font-size: 16px;
  font-weight: 600;
  color: var(--text-main);
  flex: 1;
  line-height: 1.4;
}
.faq-toggle {
  flex-shrink: 0;
  width: 24px;
  height: 24px;
  border-radius: 50%;
  border: 1px solid var(--border-strong);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 16px;
  color: var(--text-sub);
  transition: all .3s ease;
}
.faq-item.open .faq-toggle {
  transform: rotate(45deg);
  border-color: var(--accent);
  color: var(--accent);
}
.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height .35s ease;
}
.faq-answer-inner {
  padding: 0 24px 20px 64px;
  font-size: 14px;
  color: var(--text-sub);
  line-height: 1.7;
}
.cta-section {
  position: relative;
  padding: 100px 0;
  background: url('/assets/images/backpic/back-2.webp') center / cover no-repeat;
  background-attachment: fixed;
  text-align: center;
}
.cta-section::before {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(10, 14, 18, 0.92), rgba(10, 14, 18, 0.80));
}
.cta-section::after {
  content: "";
  position: absolute;
  top: -80px;
  right: -80px;
  width: 300px;
  height: 300px;
  border: 1px solid rgba(200, 245, 74, 0.15);
  border-radius: 50%;
  box-shadow: 0 0 60px rgba(200, 245, 74, 0.05);
}
.cta-section .container {
  position: relative;
  z-index: 2;
}
.cta-title {
  font-size: clamp(28px, 3.5vw, 38px);
  font-weight: 700;
  color: var(--text-main);
  margin-bottom: 12px;
  letter-spacing: -0.3px;
}
.cta-desc {
  font-size: 14px;
  color: var(--text-sub);
  margin-bottom: 32px;
  max-width: 360px;
  margin-left: auto;
  margin-right: auto;
}
.bottom-links {
  display: flex;
  justify-content: center;
  gap: 24px;
  margin-top: 24px;
}
.bottom-links a {
  font-size: 13px;
  color: var(--text-sub);
  display: inline-flex;
  align-items: center;
  gap: 6px;
  transition: color .2s;
}
.bottom-links a:hover {
  color: var(--accent);
}
.site-footer {
  background: #080B0F;
  border-top: 1px solid rgba(200, 245, 74, 0.20);
  padding: 56px 0 24px;
}
.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1.2fr;
  gap: 40px;
  margin-bottom: 40px;
}
.footer-brand .logo {
  margin-bottom: 16px;
}
.footer-brand p {
  font-size: 13px;
  color: var(--text-sub);
  line-height: 1.6;
  margin-bottom: 12px;
}
.footer-icp {
  font-size: 12px;
  color: var(--text-muted);
}
.footer-col h4 {
  font-size: 14px;
  font-weight: 600;
  color: var(--text-main);
  margin-bottom: 16px;
}
.footer-col ul {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.footer-col ul a {
  font-size: 13px;
  color: var(--text-sub);
  transition: color .2s;
}
.footer-col ul a:hover {
  color: var(--accent);
}
.contact-item {
  font-size: 13px;
  color: var(--text-sub);
  margin-bottom: 8px;
}
.footer-bottom {
  border-top: 1px solid var(--border);
  padding-top: 20px;
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 12px;
  color: var(--text-muted);
}
.footer-bottom .dot {
  color: var(--text-muted);
}
.reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}
.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}
.reveal-delay-1 { transition-delay: 80ms; }
.reveal-delay-2 { transition-delay: 160ms; }
.reveal-delay-3 { transition-delay: 240ms; }
.reveal-delay-4 { transition-delay: 320ms; }
@media (min-width: 1200px) {
  .hero-banner .container {
    max-width: 900px;
  }
}
@media (max-width: 991px) {
  :root {
    --spacing-section: 64px;
  }
  .process-steps {
    grid-template-columns: 1fr 1fr;
    gap: 16px;
  }
  .process-steps::before {
    display: none;
  }
  .scene-grid {
    grid-template-columns: 1fr;
    gap: 32px;
  }
  .scene-image {
    max-width: 600px;
    margin: 0 auto;
  }
  .main-nav {
    display: none;
  }
  .header-actions .btn {
    display: none;
  }
  .nav-toggle {
    display: flex;
  }
}
@media (max-width: 767px) {
  :root {
    --spacing-section: 48px;
  }
  .container {
    padding-left: 16px;
    padding-right: 16px;
  }
  .hero-banner {
    min-height: 380px;
    padding: 110px 0 60px;
  }
  .feature-grid {
    grid-template-columns: 1fr;
  }
  .process-steps {
    grid-template-columns: 1fr;
  }
  .process-step {
    padding: 24px;
  }
  .faq-question {
    padding: 16px;
  }
  .faq-answer-inner {
    padding: 0 16px 16px 48px;
  }
  .footer-grid {
    grid-template-columns: 1fr 1fr;
    gap: 24px;
  }
  .footer-brand {
    grid-column: 1 / -1;
  }
  .scene-image img {
    aspect-ratio: 16 / 10;
  }
  .cta-section {
    padding: 64px 0;
    background-attachment: scroll;
  }
  .hero-banner {
    background-attachment: scroll;
  }
}
@media (max-width: 576px) {
  .footer-grid {
    grid-template-columns: 1fr;
  }
  .footer-brand {
    grid-column: auto;
  }
  .hero-ctas {
    flex-direction: column;
    width: 100%;
  }
  .hero-ctas .btn {
    width: 100%;
  }
  .page-title {
    font-size: 38px;
  }
  .section-head {
    margin-bottom: 32px;
  }
  .bottom-links {
    flex-direction: column;
    align-items: center;
    gap: 12px;
  }
}
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation: none !important;
    transition: none !important;
    scroll-behavior: auto !important;
  }
  .reveal {
    opacity: 1;
    transform: none;
  }
  .hero-banner {
    background-attachment: scroll;
  }
  .cta-section {
    background-attachment: scroll;
  }
}