/* roulang page: index */
/* ============ Design Variables ============ */
:root {
  --bg-deep: #060A10;
  --bg-body: #080C14;
  --bg-section: #0D1420;
  --bg-card: #111A2B;
  --bg-elevated: #16213A;
  --neon-green: #00E68A;
  --neon-green-dim: rgba(0, 230, 138, 0.35);
  --neon-purple: #A970FF;
  --signal-orange: #FFAB2E;
  --error: #FF4D6F;
  --text-strong: #F2F6FC;
  --text-body: #B9C4D6;
  --text-muted: #7B8AA0;
  --border: rgba(255, 255, 255, 0.08);
  --border-neon: rgba(0, 230, 138, 0.4);
  --radius-btn: 10px;
  --radius-card: 16px;
  --radius-img: 12px;
  --radius-pill: 999px;
  --shadow-card: 0 4px 24px rgba(0, 0, 0, 0.3);
  --shadow-neon: 0 0 20px rgba(0, 230, 138, 0.15);
  --transition: 0.2s ease;
  --container: 1200px;
  --font: -apple-system, "PingFang SC", "HarmonicOS Sans SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
}

/* ============ Reset & Base ============ */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}
html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
}
body {
  font-family: var(--font);
  background: var(--bg-body);
  color: var(--text-body);
  font-size: 16px;
  line-height: 1.8;
  min-height: 100vh;
}
img {
  max-width: 100%;
  display: block;
}
a {
  color: inherit;
  text-decoration: none;
}
button, input, select, textarea {
  font-family: inherit;
  font-size: inherit;
  border: none;
  outline: none;
  background: none;
}
ul, ol {
  list-style: none;
}
::selection {
  background: var(--neon-green-dim);
  color: var(--text-strong);
}

/* ============ Layout Utilities ============ */
.container {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 24px;
}
.section {
  padding: 96px 0;
  position: relative;
}
.section--alt {
  background: var(--bg-section);
}
.section__head {
  margin-bottom: 48px;
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 24px;
  flex-wrap: wrap;
}
.section__tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 14px;
  font-weight: 600;
  color: var(--neon-green);
  letter-spacing: 0.05em;
  margin-bottom: 12px;
  text-transform: uppercase;
}
.section__tag::before {
  content: "";
  width: 18px;
  height: 2px;
  background: var(--neon-green);
  display: inline-block;
  border-radius: 2px;
}
.section__title {
  font-size: 1.75rem;
  font-weight: 700;
  color: var(--text-strong);
  line-height: 1.3;
  letter-spacing: 0.01em;
  margin-bottom: 10px;
}
.section__desc {
  font-size: 1rem;
  color: var(--text-muted);
  max-width: 560px;
}

/* ============ Buttons ============ */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 24px;
  border-radius: var(--radius-btn);
  font-size: 15px;
  font-weight: 700;
  transition: background var(--transition), color var(--transition), border-color var(--transition), box-shadow var(--transition), opacity var(--transition), transform var(--transition);
  cursor: pointer;
  line-height: 1.4;
  min-height: 44px;
  white-space: nowrap;
}
.btn--primary {
  background: var(--neon-green);
  color: #000;
}
.btn--primary:hover {
  background: #29EF9E;
  box-shadow: 0 0 18px rgba(0, 230, 138, 0.4);
  color: #000;
  transform: translateY(-1px);
}
.btn--primary:active {
  filter: brightness(0.95);
  transform: translateY(0);
}
.btn--ghost {
  background: transparent;
  border: 1px solid var(--border);
  color: var(--text-strong);
}
.btn--ghost:hover {
  border-color: var(--neon-green);
  color: var(--text-strong);
  box-shadow: 0 0 14px rgba(0, 230, 138, 0.12);
}
.btn--ghost:active {
  background: rgba(0, 230, 138, 0.05);
}
.btn--accent {
  background: var(--neon-purple);
  color: #0A0A0F;
}
.btn--accent:hover {
  box-shadow: 0 0 18px rgba(169, 112, 255, 0.4);
  color: #0A0A0F;
}
.btn:disabled,
.btn.is-disabled {
  opacity: 0.4;
  pointer-events: none;
}
.btn:focus-visible,
a:focus-visible,
button:focus-visible {
  outline: 3px solid var(--neon-green-dim);
  outline-offset: 2px;
}

/* ============ Badges / Tags ============ */
.badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 12px;
  border-radius: var(--radius-pill);
  font-size: 12px;
  font-weight: 600;
  line-height: 1.6;
  letter-spacing: 0.04em;
}
.badge--green {
  border: 1px solid var(--border-neon);
  color: var(--neon-green);
  background: rgba(0, 230, 138, 0.08);
}
.badge--purple {
  border: 1px solid rgba(169, 112, 255, 0.45);
  color: var(--neon-purple);
  background: rgba(169, 112, 255, 0.08);
}
.badge--orange {
  border: 1px solid rgba(255, 171, 46, 0.45);
  color: var(--signal-orange);
  background: rgba(255, 171, 46, 0.08);
}
.badge--reco {
  position: absolute;
  top: 16px;
  right: 16px;
  background: var(--signal-orange);
  color: #1A1206;
  border: none;
  font-weight: 700;
}

/* ============ Header & Navigation ============ */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: 72px;
  background: rgba(6, 10, 16, 0.9);
  -webkit-backdrop-filter: blur(12px);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
  z-index: 1000;
}
.header__inner {
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}
.logo {
  display: flex;
  align-items: baseline;
  gap: 10px;
  flex-shrink: 0;
}
.logo__main {
  font-size: 1.35rem;
  font-weight: 800;
  color: var(--text-strong);
  letter-spacing: 0.08em;
  line-height: 1;
  display: flex;
  align-items: center;
  gap: 8px;
}
.logo__main::before {
  content: "";
  width: 8px;
  height: 8px;
  background: var(--neon-green);
  border-radius: 50%;
  box-shadow: 0 0 8px var(--neon-green-dim);
  display: inline-block;
}
.logo__sub {
  font-size: 12px;
  color: var(--text-muted);
  letter-spacing: 0.06em;
  border-left: 1px solid var(--border);
  padding-left: 10px;
  line-height: 1.4;
}
.nav {
  display: flex;
  align-items: center;
  gap: 8px;
}
.nav__link {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 10px 14px;
  font-size: 15px;
  color: var(--text-body);
  border-radius: 8px;
  position: relative;
  transition: color var(--transition), background var(--transition);
  font-weight: 500;
  line-height: 1.4;
}
.nav__link:hover {
  color: var(--text-strong);
  background: rgba(255, 255, 255, 0.04);
}
.nav__link.active {
  color: var(--neon-green);
}
.nav__link.active::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 14px;
  right: 14px;
  height: 2px;
  background: var(--neon-green);
  border-radius: 2px;
  box-shadow: 0 0 8px var(--neon-green-dim);
  transition: var(--transition);
}
.nav__cta {
  margin-left: 12px;
  padding: 10px 22px;
  font-size: 14px;
}
.nav__burger {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 44px;
  height: 44px;
  padding: 10px;
  border-radius: 8px;
  cursor: pointer;
  background: transparent;
  transition: background var(--transition);
}
.nav__burger:hover {
  background: rgba(255, 255, 255, 0.04);
}
.nav__burger span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--neon-green);
  border-radius: 2px;
  transition: transform 0.25s ease, opacity 0.25s ease;
}
.nav__burger.active span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}
.nav__burger.active span:nth-child(2) {
  opacity: 0;
}

/* ============ Hero ============ */
.hero {
  position: relative;
  padding: 180px 0 110px;
  background-image: linear-gradient(rgba(6, 10, 16, 0.86), rgba(8, 12, 20, 0.94)), url('/assets/images/backpic/back-1.webp');
  background-size: cover;
  background-position: center;
  overflow: hidden;
  border-bottom: 1px solid var(--border);
}
.hero::before {
  content: "";
  position: absolute;
  top: -80px;
  right: -60px;
  width: 480px;
  height: 480px;
  background: radial-gradient(circle, rgba(0, 230, 138, 0.05), transparent 70%);
  pointer-events: none;
}
.hero::after {
  content: "";
  position: absolute;
  bottom: -100px;
  left: 20%;
  width: 420px;
  height: 420px;
  background: radial-gradient(circle, rgba(169, 112, 255, 0.04), transparent 70%);
  pointer-events: none;
}
.hero__inner {
  position: relative;
  z-index: 2;
  max-width: 760px;
}
.hero__tag {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 16px;
  border-radius: var(--radius-pill);
  border: 1px solid var(--border-neon);
  background: rgba(0, 230, 138, 0.08);
  color: var(--neon-green);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.06em;
  margin-bottom: 24px;
}
.hero__title {
  font-size: clamp(2.1rem, 5vw, 3.6rem);
  font-weight: 800;
  line-height: 1.15;
  letter-spacing: 0.01em;
  color: var(--text-strong);
  margin-bottom: 20px;
}
.hero__title .hl {
  color: var(--neon-green);
  text-shadow: 0 0 30px rgba(0, 230, 138, 0.25);
}
.hero__subtitle {
  font-size: 1.125rem;
  color: var(--text-body);
  line-height: 1.9;
  margin-bottom: 36px;
  max-width: 640px;
}
.hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  margin-bottom: 40px;
}
.hero__trust {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 28px;
  padding-top: 24px;
  border-top: 1px solid var(--border);
}
.hero__trust li {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 14px;
  color: var(--text-muted);
}
.trust-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--neon-green);
  box-shadow: 0 0 6px var(--neon-green-dim);
  display: inline-block;
}

/* ============ Feature Group (Staggered) ============ */
.features {
  background: var(--bg-body);
}
.feature-list {
  display: flex;
  flex-direction: column;
  gap: 28px;
}
.feature-card {
  display: flex;
  align-items: flex-start;
  gap: 28px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-card);
  padding: 32px 36px;
  box-shadow: var(--shadow-card);
  transition: transform var(--transition), border-color var(--transition), box-shadow var(--transition);
  max-width: 85%;
}
.feature-card:nth-child(odd) {
  margin-right: 15%;
}
.feature-card:nth-child(even) {
  margin-left: 15%;
}
.feature-card:hover {
  transform: translateY(-4px);
  border-color: var(--border-neon);
  box-shadow: var(--shadow-card), var(--shadow-neon);
}
.feature-card__num {
  font-size: 2rem;
  font-weight: 800;
  line-height: 1;
  flex-shrink: 0;
  font-family: var(--font);
  letter-spacing: 0.02em;
}
.feature-card:nth-child(odd) .feature-card__num {
  color: var(--neon-green);
  text-shadow: 0 0 20px var(--neon-green-dim);
}
.feature-card:nth-child(even) .feature-card__num {
  color: var(--neon-purple);
  text-shadow: 0 0 20px rgba(169, 112, 255, 0.3);
}
.feature-card__body h3 {
  font-size: 1.125rem;
  font-weight: 600;
  color: var(--text-strong);
  margin-bottom: 8px;
  line-height: 1.4;
}
.feature-card__body p {
  font-size: 14px;
  color: var(--text-muted);
  line-height: 1.9;
}

/* ============ Timeline Scenarios ============ */
.timeline {
  position: relative;
  padding: 8px 0;
}
.timeline::before {
  content: "";
  position: absolute;
  left: 50%;
  top: 0;
  bottom: 0;
  width: 1px;
  background: var(--border);
  transform: translateX(-50%);
}
.timeline__item {
  position: relative;
  margin-bottom: 64px;
}
.timeline__item:last-child {
  margin-bottom: 0;
}
.timeline__node {
  position: absolute;
  left: 50%;
  top: 26px;
  width: 10px;
  height: 10px;
  background: var(--neon-green);
  border-radius: 50%;
  transform: translateX(-50%);
  box-shadow: 0 0 12px var(--neon-green-dim), 0 0 0 4px rgba(0, 230, 138, 0.15);
  z-index: 3;
}
.timeline__row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  align-items: center;
}
.timeline__item:nth-child(even) .timeline__media {
  order: -1;
}
.timeline__content {
  padding: 12px 0;
}
.timeline__content h3 {
  font-size: 1.4rem;
  font-weight: 700;
  color: var(--text-strong);
  margin-bottom: 12px;
  line-height: 1.4;
}
.timeline__content p {
  font-size: 15px;
  color: var(--text-muted);
  line-height: 1.9;
}
.timeline__media {
  position: relative;
  border-radius: var(--radius-img);
  overflow: hidden;
  aspect-ratio: 16 / 10;
  background: var(--bg-card);
  border: 1px solid var(--border);
}
.timeline__media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.4s ease;
}
.timeline__media:hover img {
  transform: scale(1.03);
}

/* ============ Data Band & Cases ============ */
.data-band {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  margin-bottom: 56px;
}
.data-band__item {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-card);
  padding: 28px 20px;
  text-align: center;
  transition: border-color var(--transition), box-shadow var(--transition);
}
.data-band__item:hover {
  border-color: var(--border-neon);
  box-shadow: var(--shadow-neon);
}
.data-band__num {
  font-size: 2.5rem;
  font-weight: 800;
  color: var(--neon-green);
  line-height: 1.2;
  margin-bottom: 6px;
  letter-spacing: 0.02em;
  text-shadow: 0 0 20px rgba(0, 230, 138, 0.15);
}
.data-band__label {
  font-size: 0.875rem;
  color: var(--text-muted);
}
.case-list {
  display: grid;
  grid-template-columns: 1fr;
  gap: 24px;
}
.case-card {
  display: grid;
  grid-template-columns: 5fr 7fr;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-card);
  overflow: hidden;
  box-shadow: var(--shadow-card);
  transition: border-color var(--transition), box-shadow var(--transition), transform var(--transition);
}
.case-card:hover {
  border-color: var(--border-neon);
  box-shadow: var(--shadow-card), var(--shadow-neon);
  transform: translateY(-3px);
}
.case-card__media {
  overflow: hidden;
  aspect-ratio: 4 / 3;
  background: var(--bg-elevated);
}
.case-card__media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.4s ease;
}
.case-card:hover .case-card__media img {
  transform: scale(1.03);
}
.case-card__body {
  padding: 36px;
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 10px;
}
.case-card__body h3 {
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--text-strong);
  line-height: 1.4;
}
.case-card__body p {
  font-size: 0.9375rem;
  color: var(--text-muted);
  line-height: 1.9;
}

/* ============ Pricing ============ */
.pricing__grid {
  display: grid;
  grid-template-columns: 7fr 5fr;
  gap: 24px;
  align-items: stretch;
}
.pricing-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-card);
  padding: 36px;
  position: relative;
  box-shadow: var(--shadow-card);
  transition: border-color var(--transition), box-shadow var(--transition), transform var(--transition);
}
.pricing-card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-card), var(--shadow-neon);
}
.pricing-card--featured {
  border: 1.5px solid var(--border-neon);
}
.pricing-card__name {
  font-size: 1.125rem;
  font-weight: 700;
  color: var(--text-strong);
  margin-bottom: 6px;
}
.pricing-card__desc {
  font-size: 0.875rem;
  color: var(--text-muted);
  margin-bottom: 20px;
}
.pricing-card__price {
  font-size: 2.25rem;
  font-weight: 800;
  color: var(--neon-green);
  line-height: 1.2;
  margin-bottom: 20px;
  display: flex;
  align-items: baseline;
  gap: 6px;
}
.pricing-card__price .unit {
  font-size: 0.875rem;
  color: var(--text-muted);
  font-weight: 400;
}
.pricing-card__list {
  margin-bottom: 28px;
}
.pricing-card__list li {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  font-size: 14px;
  color: var(--text-body);
  line-height: 1.8;
  padding: 6px 0;
}
.pricing-card__list li::before {
  content: "";
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--neon-green);
  flex-shrink: 0;
  margin-top: 10px;
  box-shadow: 0 0 6px var(--neon-green-dim);
}
.pricing-card--featured .pricing-card__list li::before {
  background: var(--signal-orange);
  box-shadow: 0 0 6px rgba(255, 171, 46, 0.4);
}
.pricing-card .btn {
  width: 100%;
}
.pricing__side {
  display: grid;
  grid-template-columns: 1fr;
  gap: 24px;
  align-content: stretch;
}
.pricing__side .pricing-card {
  padding: 28px;
}
.pricing__side .pricing-card__price {
  font-size: 1.75rem;
}

/* ============ News Section (CMS) ============ */
.news {
  background: var(--bg-section);
}
.news__all {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 14px;
  font-weight: 600;
  color: var(--neon-green);
  background: rgba(0, 230, 138, 0.08);
  border: 1px solid var(--border-neon);
  padding: 10px 20px;
  border-radius: var(--radius-pill);
  transition: background var(--transition), box-shadow var(--transition);
}
.news__all:hover {
  background: rgba(0, 230, 138, 0.15);
  box-shadow: 0 0 16px rgba(0, 230, 138, 0.18);
}
.news__grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
}
.news-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-card);
  box-shadow: var(--shadow-card);
  transition: border-color var(--transition), box-shadow var(--transition), transform var(--transition);
}
.news-card:hover {
  border-color: var(--border-neon);
  box-shadow: var(--shadow-card), var(--shadow-neon);
  transform: translateY(-4px);
}
.news-card__link {
  display: flex;
  flex-direction: column;
  height: 100%;
  padding: 28px;
  gap: 12px;
}
.news-card__meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 4px;
}
.news-card__time {
  font-size: 13px;
  color: var(--text-muted);
}
.news-card__title {
  font-size: 1.125rem;
  font-weight: 600;
  color: var(--text-strong);
  line-height: 1.5;
  transition: color var(--transition);
}
.news-card:hover .news-card__title {
  color: var(--neon-green);
}
.news-card__summary {
  font-size: 0.875rem;
  color: var(--text-muted);
  line-height: 1.8;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.news-card__more {
  margin-top: auto;
  font-size: 13px;
  font-weight: 600;
  color: var(--neon-green);
  display: inline-flex;
  align-items: center;
  gap: 4px;
  opacity: 0;
  transition: opacity var(--transition);
}
.news-card:hover .news-card__more {
  opacity: 1;
}
.news-empty {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 16px;
  padding: 56px 24px;
  background: var(--bg-card);
  border: 1px dashed var(--border);
  border-radius: var(--radius-card);
  text-align: center;
}
.news-empty__icon {
  font-size: 40px;
  color: var(--text-muted);
  line-height: 1;
  opacity: 0.6;
}
.news-empty__text {
  font-size: 0.9375rem;
  color: var(--text-muted);
}

/* ============ FAQ ============ */
.faq-list {
  max-width: 800px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 16px;
}
.faq__item {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-card);
  overflow: hidden;
  transition: border-color var(--transition), background var(--transition);
}
.faq__item.open {
  background: var(--bg-elevated);
  border-color: var(--border-neon);
}
.faq__header {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 20px 24px;
  cursor: pointer;
  text-align: left;
  color: var(--text-strong);
  font-size: 16px;
  font-weight: 600;
  line-height: 1.6;
  transition: color var(--transition);
  background: transparent;
  border: none;
  min-height: 44px;
}
.faq__header:hover {
  color: var(--neon-green);
}
.faq__icon {
  width: 22px;
  height: 22px;
  flex-shrink: 0;
  position: relative;
  display: inline-block;
}
.faq__icon::before,
.faq__icon::after {
  content: "";
  position: absolute;
  top: 50%;
  left: 50%;
  width: 12px;
  height: 2px;
  background: var(--neon-green);
  transform: translate(-50%, -50%);
  border-radius: 2px;
  transition: transform 0.3s ease;
}
.faq__icon::after {
  transform: translate(-50%, -50%) rotate(90deg);
}
.faq__item.open .faq__icon::after {
  transform: translate(-50%, -50%) rotate(0deg);
}
.faq__body {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.3s ease;
}
.faq__body-inner {
  padding: 0 24px 20px;
  border-left: 3px solid var(--neon-green);
  margin-left: 24px;
}
.faq__body p {
  font-size: 14px;
  color: var(--text-body);
  line-height: 1.9;
}

/* ============ CTA Bar ============ */
.cta-bar {
  position: relative;
  background: var(--bg-deep);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
  padding: 80px 0;
  overflow: hidden;
  text-align: center;
}
.cta-bar::before {
  content: "";
  position: absolute;
  top: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 600px;
  max-width: 100%;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--neon-green), transparent);
  box-shadow: 0 0 20px rgba(0, 230, 138, 0.4);
}
.cta-bar::after {
  content: "";
  position: absolute;
  top: 50%;
  left: 50%;
  width: 500px;
  height: 500px;
  transform: translate(-50%, -50%);
  background: radial-gradient(circle, rgba(0, 230, 138, 0.05), transparent 70%);
  pointer-events: none;
}
.cta-bar__inner {
  position: relative;
  z-index: 2;
}
.cta-bar__title {
  font-size: 1.75rem;
  font-weight: 700;
  color: var(--text-strong);
  margin-bottom: 12px;
  line-height: 1.4;
}
.cta-bar__text {
  font-size: 1rem;
  color: var(--text-muted);
  margin-bottom: 32px;
}

/* ============ Footer ============ */
.site-footer {
  background: var(--bg-deep);
  border-top: 1px solid var(--border);
  padding: 64px 0 32px;
}
.footer__grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1.2fr;
  gap: 40px;
  margin-bottom: 48px;
}
.footer__brand .logo {
  margin-bottom: 14px;
}
.footer__brand p {
  font-size: 14px;
  color: var(--text-muted);
  line-height: 1.9;
  margin-bottom: 20px;
  max-width: 300px;
}
.footer__social {
  display: flex;
  gap: 12px;
}
.footer__social a {
  width: 36px;
  height: 36px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--border);
  border-radius: 8px;
  font-size: 14px;
  color: var(--text-muted);
  transition: border-color var(--transition), color var(--transition), box-shadow var(--transition);
}
.footer__social a:hover {
  border-color: var(--neon-green);
  color: var(--neon-green);
  box-shadow: 0 0 12px rgba(0, 230, 138, 0.12);
}
.footer__heading {
  font-size: 15px;
  font-weight: 700;
  color: var(--text-strong);
  margin-bottom: 18px;
}
.footer__links li {
  margin-bottom: 10px;
}
.footer__links a {
  font-size: 14px;
  color: var(--text-muted);
  transition: color var(--transition), padding-left var(--transition);
}
.footer__links a:hover {
  color: var(--neon-green);
  padding-left: 4px;
}
.footer__contact li {
  font-size: 14px;
  color: var(--text-muted);
  line-height: 1.8;
  margin-bottom: 8px;
  display: flex;
  gap: 8px;
  align-items: flex-start;
}
.footer__contact .label {
  color: var(--text-body);
  font-weight: 600;
  flex-shrink: 0;
}
.footer__bottom {
  border-top: 1px solid var(--border);
  padding-top: 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
  font-size: 13px;
  color: var(--text-muted);
}
.footer__bottom a {
  color: var(--text-muted);
}
.footer__bottom a:hover {
  color: var(--neon-green);
}

/* ============ Responsive: Tablet ============ */
@media (max-width: 1023px) {
  .section {
    padding: 64px 0;
  }
  .nav__link {
    padding: 10px 10px;
    font-size: 14px;
  }
  .nav__cta {
    margin-left: 6px;
    padding: 10px 16px;
  }
  .feature-card {
    max-width: 92%;
  }
  .feature-card:nth-child(odd) {
    margin-right: 8%;
  }
  .feature-card:nth-child(even) {
    margin-left: 8%;
  }
  .timeline__row {
    gap: 28px;
  }
  .case-card__body {
    padding: 24px;
  }
  .pricing__grid {
    grid-template-columns: 1fr;
  }
  .pricing__side {
    grid-template-columns: 1fr 1fr;
    gap: 24px;
  }
  .footer__grid {
    grid-template-columns: 1fr 1fr;
  }
}

/* ============ Responsive: Mobile ============ */
@media (max-width: 767px) {
  .site-header {
    height: 60px;
  }
  .logo__sub {
    display: none;
  }
  .nav__burger {
    display: flex;
  }
  .nav {
    position: fixed;
    top: 60px;
    left: 0;
    right: 0;
    bottom: 0;
    height: calc(100vh - 60px);
    background: var(--bg-deep);
    flex-direction: column;
    align-items: flex-start;
    justify-content: flex-start;
    gap: 8px;
    padding: 40px 28px;
    transform: translateX(100%);
    transition: transform 0.3s ease;
    z-index: 999;
    overflow-y: auto;
  }
  .nav.open {
    transform: translateX(0);
  }
  .nav__link {
    font-size: 22px;
    font-weight: 600;
    padding: 14px 6px;
    width: 100%;
    color: var(--text-body);
    border-left: 4px solid transparent;
    border-radius: 0;
  }
  .nav__link.active {
    color: var(--neon-green);
    border-left-color: var(--neon-green);
    background: rgba(0, 230, 138, 0.04);
  }
  .nav__link.active::after {
    display: none;
  }
  .nav__cta {
    width: 100%;
    margin: 24px 0 0;
    font-size: 16px;
    padding: 14px 24px;
  }
  .hero {
    padding: 132px 0 72px;
  }
  .hero__title {
    font-size: 1.8rem;
  }
  .hero__subtitle {
    font-size: 1rem;
  }
  .hero__actions {
    flex-direction: column;
    align-items: stretch;
  }
  .hero__actions .btn {
    width: 100%;
  }
  .hero__trust {
    flex-direction: column;
    gap: 12px;
  }
  .section {
    padding: 48px 0;
  }
  .section__head {
    flex-direction: column;
    align-items: flex-start;
  }
  .feature-card {
    max-width: 100%;
    padding: 24px;
    flex-direction: column;
    gap: 16px;
  }
  .feature-card:nth-child(odd),
  .feature-card:nth-child(even) {
    margin-right: 0;
    margin-left: 0;
  }
  .timeline::before {
    left: 5px;
  }
  .timeline__node {
    left: 5px;
    transform: translateX(-50%);
  }
  .timeline__row {
    grid-template-columns: 1fr;
    gap: 20px;
    padding-left: 24px;
  }
  .timeline__item:nth-child(even) .timeline__media {
    order: 0;
  }
  .timeline__content h3 {
    font-size: 1.2rem;
  }
  .data-band {
    grid-template-columns: 1fr 1fr;
    gap: 16px;
  }
  .data-band__num {
    font-size: 2rem;
  }
  .case-card {
    grid-template-columns: 1fr;
  }
  .case-card__media {
    aspect-ratio: 16 / 10;
  }
  .case-card__body {
    padding: 24px;
  }
  .pricing__side {
    grid-template-columns: 1fr;
  }
  .pricing-card {
    padding: 28px;
  }
  .news__grid {
    grid-template-columns: 1fr;
  }
  .news-card__link {
    padding: 22px;
  }
  .cta-bar {
    padding: 56px 0;
  }
  .cta-bar__title {
    font-size: 1.35rem;
  }
  .footer__grid {
    grid-template-columns: 1fr;
    gap: 32px;
  }
  .footer__bottom {
    flex-direction: column;
    text-align: center;
  }
  .btn {
    min-height: 44px;
  }
}

/* ============ Accessibility ============ */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation: none !important;
    transition: none !important;
  }
  html {
    scroll-behavior: auto;
  }
}

/* roulang page: category1 */
:root {
  --bg-deep: #060A10;
  --bg-body: #080C14;
  --bg-section: #0D1420;
  --bg-card: #111A2B;
  --bg-elevated: #16213A;
  --neon-green: #00E68A;
  --neon-green-dim: rgba(0, 230, 138, 0.35);
  --neon-purple: #A970FF;
  --signal-orange: #FFAB2E;
  --error: #FF4D6F;
  --text-strong: #F2F6FC;
  --text-body: #B9C4D6;
  --text-muted: #7B8AA0;
  --border: rgba(255, 255, 255, 0.08);
  --border-neon: rgba(0, 230, 138, 0.4);
  --radius-btn: 10px;
  --radius-card: 16px;
  --radius-img: 12px;
  --radius-pill: 999px;
  --shadow-card: 0 4px 24px rgba(0,0,0,0.3);
  --shadow-neon: 0 0 20px rgba(0,230,138,0.15);
  --container-max: 1200px;
  --transition: 0.2s ease;
  --font-sans: -apple-system, "PingFang SC", "HarmonicOS Sans SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
}
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.8;
  background: var(--bg-body);
  color: var(--text-body);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}
img { max-width: 100%; height: auto; display: block; }
a { color: inherit; text-decoration: none; transition: color var(--transition); }
button { font-family: inherit; cursor: pointer; border: none; background: none; }
ul, ol { margin: 0; padding: 0; list-style: none; }
h1, h2, h3, h4, h5, h6 { margin: 0; color: var(--text-strong); line-height: 1.3; font-weight: 700; }
p { margin: 0; }
:focus-visible { outline: 2px solid var(--neon-green); outline-offset: 2px; }
::selection { background: var(--neon-green); color: #000; }
.container { max-width: var(--container-max); margin: 0 auto; padding: 0 24px; }
@media (max-width: 767px) {
  .container { padding: 0 16px; }
}

/* Header */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  height: 72px;
  background: rgba(6,10,16,0.92);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
}
.header__inner {
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}
.logo {
  display: inline-flex;
  align-items: baseline;
  gap: 8px;
  flex-shrink: 0;
}
.logo__main {
  font-size: 1.4rem;
  font-weight: 800;
  letter-spacing: 0.08em;
  color: var(--text-strong);
  position: relative;
  line-height: 1;
}
.logo__main::before {
  content: '';
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--neon-green);
  box-shadow: 0 0 10px var(--neon-green);
  position: absolute;
  top: -2px;
  right: -7px;
}
.logo__sub {
  font-size: 12px;
  color: var(--text-muted);
  letter-spacing: 0.06em;
  white-space: nowrap;
}
.nav {
  display: flex;
  align-items: center;
  gap: 28px;
}
.nav__link {
  font-size: 15px;
  font-weight: 500;
  color: var(--text-body);
  position: relative;
  padding: 8px 0;
  transition: color var(--transition);
  white-space: nowrap;
}
.nav__link:hover { color: var(--text-strong); }
.nav__link.active {
  color: var(--neon-green);
}
.nav__link.active::after {
  content: '';
  position: absolute;
  bottom: -1px;
  left: 0;
  width: 100%;
  height: 2px;
  background: var(--neon-green);
  border-radius: 2px;
  box-shadow: 0 0 8px var(--neon-green);
}
.nav__cta { margin-left: 8px; }
.nav__burger {
  display: none;
  width: 44px;
  height: 44px;
  border-radius: 10px;
  border: 1px solid var(--border);
  background: var(--bg-card);
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 6px;
}
.nav__burger span {
  display: block;
  width: 20px;
  height: 2px;
  border-radius: 2px;
  background: var(--neon-green);
  transition: transform 0.3s, opacity 0.3s;
}
.nav__burger.open span:nth-child(1) { transform: translateY(4px) rotate(45deg); }
.nav__burger.open span:nth-child(2) { transform: translateY(-4px) rotate(-45deg); }
@media (max-width: 1023px) {
  .nav { gap: 16px; }
  .nav__link { font-size: 14px; }
  .nav__cta { padding: 10px 16px; font-size: 14px; }
}
@media (max-width: 767px) {
  .site-header { height: 60px; }
  .nav__burger { display: flex; }
  .nav {
    position: fixed;
    top: 60px;
    left: 0;
    right: 0;
    bottom: 0;
    background: var(--bg-deep);
    flex-direction: column;
    align-items: flex-start;
    justify-content: flex-start;
    gap: 0;
    padding: 32px 24px 48px;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-12px);
    transition: opacity 0.3s, visibility 0.3s, transform 0.3s;
    overflow-y: auto;
    z-index: 999;
    border-top: 1px solid var(--border);
  }
  .nav.open {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
  }
  .nav__link {
    display: block;
    width: 100%;
    padding: 16px 0;
    font-size: 22px;
    font-weight: 600;
    border-bottom: 1px solid var(--border);
  }
  .nav__link.active::after {
    left: -24px;
    top: 12px;
    bottom: 12px;
    width: 4px;
    height: auto;
    border-radius: 4px;
    box-shadow: 0 0 10px var(--neon-green);
  }
  .nav__cta {
    margin-top: 24px;
    width: 100%;
    text-align: center;
    padding: 14px 24px;
    font-size: 16px;
  }
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 24px;
  border-radius: var(--radius-btn);
  font-size: 15px;
  font-weight: 700;
  line-height: 1.4;
  transition: box-shadow var(--transition), transform var(--transition), background var(--transition), border-color var(--transition), color var(--transition);
  border: 1px solid transparent;
  text-align: center;
}
.btn--primary {
  background: var(--neon-green);
  color: #000;
}
.btn--primary:hover {
  background: #00f298;
  box-shadow: 0 0 18px rgba(0,230,138,0.4);
  transform: translateY(-1px);
}
.btn--primary:active { filter: brightness(0.92); transform: translateY(0); }
.btn--secondary {
  background: transparent;
  border-color: var(--border);
  color: var(--text-strong);
}
.btn--secondary:hover {
  border-color: var(--neon-green);
  color: var(--text-strong);
  box-shadow: 0 0 16px rgba(0,230,138,0.12);
}
.btn--purple {
  background: var(--neon-purple);
  color: #000;
}
.btn--purple:hover {
  box-shadow: 0 0 18px rgba(169,112,255,0.4);
  transform: translateY(-1px);
}
.btn:disabled {
  opacity: 0.4;
  pointer-events: none;
}
.btn--lg { padding: 14px 32px; font-size: 16px; }

/* Hero */
.hero {
  position: relative;
  padding: 180px 0 96px;
  margin-top: 72px;
  background:
    linear-gradient(rgba(6,10,16,0.72), rgba(8,12,20,0.88)),
    url('/assets/images/backpic/back-1.webp') center 20% / cover no-repeat;
  overflow: hidden;
}
.hero::after {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse at 75% 40%, rgba(0,230,138,0.05), transparent 50%),
              radial-gradient(ellipse at 20% 70%, rgba(169,112,255,0.05), transparent 40%);
  pointer-events: none;
}
.hero__inner {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: 1fr;
  gap: 24px;
  max-width: 820px;
}
.hero__tag {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  width: fit-content;
  padding: 6px 16px;
  border: 1px solid var(--border-neon);
  border-radius: var(--radius-pill);
  font-size: 13px;
  color: var(--neon-green);
  letter-spacing: 0.04em;
  background: rgba(0,230,138,0.06);
}
.hero__tag::before {
  content: '';
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--neon-green);
  box-shadow: 0 0 8px var(--neon-green);
}
.hero h1 {
  font-size: clamp(2.1rem, 5vw, 3.6rem);
  font-weight: 800;
  line-height: 1.15;
  letter-spacing: 0.01em;
}
.hero__sub {
  font-size: 1.15rem;
  line-height: 1.8;
  color: var(--text-body);
  max-width: 640px;
}
.hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  margin-top: 8px;
}
.hero__trust {
  display: flex;
  flex-wrap: wrap;
  gap: 18px;
  margin-top: 28px;
  padding-top: 24px;
  border-top: 1px solid var(--border);
}
.hero__trust span {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  color: var(--text-muted);
}
.hero__trust i { color: var(--neon-green); font-size: 14px; }
@media (max-width: 767px) {
  .hero { padding: 140px 0 56px; margin-top: 60px; }
  .hero h1 { font-size: 1.8rem; }
  .hero__sub { font-size: 1rem; }
}

/* Section base */
.section { padding: 96px 0; }
.section--alt { background: var(--bg-section); }
.section__head {
  margin-bottom: 48px;
  max-width: 720px;
}
.section__head--center { margin-left: auto; margin-right: auto; text-align: center; }
.section__head h2 {
  font-size: 1.75rem;
  font-weight: 700;
  margin-bottom: 12px;
  position: relative;
}
.section__head p { color: var(--text-muted); font-size: 0.95rem; }
.section__head .lead {
  font-size: 0.95rem;
  color: var(--text-muted);
  line-height: 1.8;
}
@media (max-width: 767px) {
  .section { padding: 56px 0; }
  .section__head { margin-bottom: 32px; }
}

/* Intro split */
.split {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 56px;
  align-items: center;
}
.split__media {
  border-radius: var(--radius-card);
  overflow: hidden;
  border: 1px solid var(--border);
  box-shadow: var(--shadow-card);
  background: var(--bg-card);
}
.split__media img { width: 100%; height: 340px; object-fit: cover; }
.split__content h3 {
  font-size: 1.4rem;
  font-weight: 700;
  margin-bottom: 16px;
}
.split__content p { margin-bottom: 16px; line-height: 1.9; color: var(--text-body); }
.split__content p:last-child { margin-bottom: 0; }
.split__points { margin-top: 20px; display: grid; gap: 12px; }
.split__points li {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  font-size: 15px;
  color: var(--text-body);
  line-height: 1.7;
}
.split__points i { color: var(--neon-green); margin-top: 4px; flex-shrink: 0; }
@media (max-width: 1023px) {
  .split { gap: 32px; }
  .split__media img { height: 260px; }
}
@media (max-width: 767px) {
  .split { grid-template-columns: 1fr; gap: 24px; }
  .split__media img { height: 200px; }
}

/* Steps */
.steps { position: relative; }
.steps::before {
  content: '';
  position: absolute;
  left: 22px;
  top: 24px;
  bottom: 24px;
  width: 1px;
  background: var(--border-neon);
}
.steps-list {
  display: grid;
  gap: 32px;
  padding-left: 8px;
}
.step {
  position: relative;
  display: grid;
  grid-template-columns: 56px 1fr;
  gap: 20px;
  padding: 28px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-card);
  transition: box-shadow var(--transition), transform var(--transition), border-color var(--transition);
}
.step:hover {
  border-color: var(--border-neon);
  box-shadow: var(--shadow-neon), var(--shadow-card);
  transform: translateY(-4px);
}
.step__num {
  font-size: 2rem;
  font-weight: 800;
  line-height: 1;
  color: var(--neon-green);
  padding: 4px 0;
  text-shadow: 0 0 18px rgba(0,230,138,0.24);
}
.step:nth-child(even) .step__num { color: var(--neon-purple); text-shadow: 0 0 18px rgba(169,112,255,0.24); }
.step__body h3 { font-size: 1.15rem; font-weight: 600; margin-bottom: 8px; }
.step__body p { font-size: 0.92rem; color: var(--text-muted); line-height: 1.8; }
@media (max-width: 767px) {
  .steps::before { left: 18px; }
  .steps-list { gap: 20px; padding-left: 0; }
  .step { grid-template-columns: 44px 1fr; gap: 14px; padding: 20px; }
  .step__num { font-size: 1.4rem; }
}

/* Scenarios */
.scenario-list { display: grid; gap: 24px; }
.scenario {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 32px;
  align-items: center;
  padding: 28px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-card);
  transition: box-shadow var(--transition), border-color var(--transition);
}
.scenario:hover { border-color: var(--border-neon); box-shadow: var(--shadow-neon); }
.scenario__media {
  border-radius: var(--radius-img);
  overflow: hidden;
  background: var(--bg-elevated);
  min-height: 180px;
}
.scenario__media img { width: 100%; height: 180px; object-fit: cover; transition: transform 0.3s ease; }
.scenario:hover .scenario__media img { transform: scale(1.03); }
.scenario:nth-child(odd) .scenario__media { order: 2; }
.scenario__body h3 {
  font-size: 1.15rem;
  font-weight: 600;
  margin-bottom: 8px;
  display: flex;
  align-items: center;
  gap: 10px;
}
.scenario__body h3 i { color: var(--neon-green); font-size: 16px; }
.scenario__body p { font-size: 0.92rem; color: var(--text-muted); line-height: 1.8; }
@media (max-width: 767px) {
  .scenario { grid-template-columns: 1fr; gap: 16px; padding: 20px; }
  .scenario:nth-child(odd) .scenario__media { order: 0; }
  .scenario__media img { height: 160px; }
}

/* Feature cards staggered */
.features {
  display: grid;
  gap: 32px;
}
.feature-row {
  display: grid;
  grid-template-columns: 1fr 1.2fr;
  gap: 32px;
  align-items: center;
  padding: 32px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-card);
  transition: border-color var(--transition), box-shadow var(--transition), transform var(--transition);
}
.feature-row:hover {
  border-color: var(--border-neon);
  box-shadow: var(--shadow-neon), var(--shadow-card);
  transform: translateY(-4px);
}
.feature-row:nth-child(odd) { margin-right: 10%; }
.feature-row:nth-child(even) { margin-left: 10%; }
.feature-row__num {
  font-size: 2.6rem;
  font-weight: 800;
  color: var(--neon-green);
  line-height: 1;
  text-shadow: 0 0 24px rgba(0,230,138,0.2);
}
.feature-row:nth-child(even) .feature-row__num { color: var(--neon-purple); text-shadow: 0 0 24px rgba(169,112,255,0.2); }
.feature-row__body h3 { font-size: 1.15rem; font-weight: 700; margin-bottom: 8px; }
.feature-row__body p { font-size: 0.92rem; color: var(--text-muted); line-height: 1.8; }
@media (max-width: 1023px) {
  .feature-row { grid-template-columns: 1fr; gap: 16px; padding: 24px; }
  .feature-row:nth-child(odd), .feature-row:nth-child(even) { margin-right: 0; margin-left: 0; }
}
@media (max-width: 767px) {
  .features { gap: 20px; }
  .feature-row { padding: 20px; grid-template-columns: 1fr; }
  .feature-row__num { font-size: 2rem; }
}

/* FAQ */
.faq-list { max-width: 860px; margin: 0 auto; display: grid; gap: 16px; }
.faq-item {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-card);
  overflow: hidden;
  transition: border-color var(--transition), box-shadow var(--transition);
}
.faq-item:hover { border-color: var(--border-neon); }
.faq-item.open { background: var(--bg-elevated); border-left: 3px solid var(--neon-green); }
.faq-item__question {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 20px 24px;
  font-size: 16px;
  font-weight: 600;
  color: var(--text-strong);
  text-align: left;
  width: 100%;
  cursor: pointer;
}
.faq-item__icon {
  flex-shrink: 0;
  width: 28px;
  height: 28px;
  border-radius: 50%;
  border: 1px solid var(--border-neon);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
  color: var(--neon-green);
  transition: transform 0.3s ease;
}
.faq-item.open .faq-item__icon { transform: rotate(45deg); background: var(--neon-green); color: #000; border-color: var(--neon-green); }
.faq-item__answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.3s ease;
}
.faq-item__answer-inner {
  padding: 0 24px 20px;
  font-size: 14px;
  color: var(--text-body);
  line-height: 1.9;
}
.faq-item.open .faq-item__answer { max-height: 500px; }
@media (max-width: 767px) {
  .faq-item__question { padding: 16px 18px; font-size: 15px; }
  .faq-item__answer-inner { padding: 0 18px 16px; font-size: 13px; }
}

/* CTA */
.cta-band {
  position: relative;
  padding: 48px 0;
  background: var(--bg-deep);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
  overflow: hidden;
}
.cta-band::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: linear-gradient(90deg, transparent, var(--neon-green), var(--neon-purple), transparent);
}
.cta-band__inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  gap: 20px;
  padding: 24px 0;
}
.cta-band h2 { font-size: 1.75rem; font-weight: 700; }
.cta-band p { color: var(--text-muted); font-size: 0.95rem; max-width: 560px; }
.cta-band .btn { margin-top: 4px; }

/* Footer */
.site-footer {
  background: var(--bg-deep);
  border-top: 1px solid var(--border);
  padding: 64px 0 32px;
}
.footer__grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr 1.2fr;
  gap: 40px;
  padding-bottom: 40px;
  border-bottom: 1px solid var(--border);
}
.footer__brand .logo { margin-bottom: 16px; }
.footer__brand p {
  font-size: 0.88rem;
  color: var(--text-muted);
  line-height: 1.8;
  margin-top: 12px;
}
.footer__social {
  display: flex;
  gap: 10px;
  margin-top: 20px;
}
.footer__social a {
  width: 36px;
  height: 36px;
  border-radius: 10px;
  border: 1px solid var(--border);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 14px;
  color: var(--text-muted);
  transition: all var(--transition);
}
.footer__social a:hover { color: var(--neon-green); border-color: var(--border-neon); box-shadow: 0 0 10px rgba(0,230,138,0.15); }
.footer__heading {
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 0.04em;
  color: var(--text-strong);
  margin-bottom: 16px;
  text-transform: uppercase;
}
.footer__links { display: grid; gap: 10px; }
.footer__links a {
  font-size: 14px;
  color: var(--text-muted);
  transition: color var(--transition);
}
.footer__links a:hover { color: var(--neon-green); }
.footer__contact { display: grid; gap: 10px; font-size: 14px; color: var(--text-muted); }
.footer__contact .label { color: var(--text-body); font-weight: 600; }
.footer__bottom {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 12px;
  padding-top: 24px;
  font-size: 13px;
  color: var(--text-muted);
}
.footer__bottom a { color: var(--text-muted); }
.footer__bottom a:hover { color: var(--neon-green); }
@media (max-width: 1023px) {
  .footer__grid { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 767px) {
  .site-footer { padding: 48px 0 24px; }
  .footer__grid { grid-template-columns: 1fr; gap: 32px; }
  .footer__bottom { flex-direction: column; }
}

/* Reduced motion */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation: none !important;
    transition: none !important;
  }
  html { scroll-behavior: auto; }
}

/* roulang page: article */
/* ============ 设计变量 ============ */
:root {
    --bg-deep: #060A10;
    --bg-body: #080C14;
    --bg-section: #0D1420;
    --bg-card: #111A2B;
    --bg-elevated: #16213A;
    --neon-green: #00E68A;
    --neon-green-dim: rgba(0, 230, 138, 0.35);
    --neon-purple: #A970FF;
    --signal-orange: #FFAB2E;
    --error: #FF4D6F;
    --text-strong: #F2F6FC;
    --text-body: #B9C4D6;
    --text-muted: #7B8AA0;
    --border: rgba(255, 255, 255, 0.08);
    --border-neon: rgba(0, 230, 138, 0.4);
    --radius-card: 16px;
    --radius-btn: 10px;
    --radius-img: 12px;
    --shadow-card: 0 4px 24px rgba(0, 0, 0, 0.3);
    --shadow-neon: 0 0 20px rgba(0, 230, 138, 0.15);
    --container: 1200px;
    --header-h: 72px;
    --space-section: 96px;
}

/* ============ Reset & Base ============ */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
    font-family: -apple-system, "PingFang SC", "HarmonicOS Sans SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
    background: var(--bg-body);
    color: var(--text-body);
    font-size: 16px;
    line-height: 1.8;
    -webkit-font-smoothing: antialiased;
    overflow-x: hidden;
}
img { max-width: 100%; display: block; }
a { color: var(--neon-green); text-decoration: none; transition: color 0.2s ease; }
a:hover { color: var(--text-strong); }
button, input, textarea, select { font-family: inherit; font-size: inherit; }
ul, ol { padding-left: 1.4em; }

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

/* ============ 容器 ============ */
.container {
    max-width: var(--container);
    margin: 0 auto;
    padding-left: 24px;
    padding-right: 24px;
}
.container-article {
    max-width: 720px;
    margin: 0 auto;
    padding-left: 24px;
    padding-right: 24px;
}

/* ============ 按钮 ============ */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 12px 24px;
    border-radius: var(--radius-btn);
    font-weight: 700;
    font-size: 15px;
    line-height: 1.2;
    border: 1px solid transparent;
    cursor: pointer;
    transition: all 0.2s ease;
    min-height: 44px;
    white-space: nowrap;
}
.btn--primary { background: var(--neon-green); color: #050606; }
.btn--primary:hover { background: #00ff9a; box-shadow: 0 0 18px rgba(0, 230, 138, 0.4); color: #050606; }
.btn--primary:active { transform: scale(0.97); background: #00cc74; color: #050606; }
.btn--ghost { background: transparent; border-color: var(--border); color: var(--text-strong); }
.btn--ghost:hover { border-color: var(--neon-green); box-shadow: 0 0 12px rgba(0, 230, 138, 0.12); color: var(--text-strong); }
.btn--ghost:active { transform: scale(0.97); }
.btn--lg { padding: 14px 34px; font-size: 16px; }
.btn:focus-visible { outline: 3px solid var(--neon-green-dim); outline-offset: 2px; }

/* ============ Header / 导航 ============ */
.site-header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: var(--header-h);
    background: rgba(6, 10, 16, 0.92);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--border);
    z-index: 1000;
    transition: background 0.3s ease, box-shadow 0.3s ease;
}
.site-header--scrolled {
    background: rgba(6, 10, 16, 0.98);
    box-shadow: 0 4px 30px rgba(0, 0, 0, 0.4);
}
.header__inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 100%;
}
.logo {
    display: flex;
    align-items: center;
    gap: 8px;
    line-height: 1;
    position: relative;
    flex-shrink: 0;
}
.logo__main {
    font-size: 24px;
    font-weight: 800;
    letter-spacing: 0.08em;
    color: var(--text-strong);
    text-transform: lowercase;
}
.logo__sub {
    font-size: 12px;
    color: var(--text-muted);
    letter-spacing: 0.04em;
    padding-top: 2px;
}
.logo::after {
    content: '';
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: var(--neon-green);
    box-shadow: 0 0 8px var(--neon-green);
    align-self: flex-start;
    margin-top: 2px;
    margin-left: 2px;
    flex-shrink: 0;
}
.nav {
    display: flex;
    align-items: center;
    gap: 28px;
}
.nav__link {
    position: relative;
    color: var(--text-body);
    font-size: 15px;
    font-weight: 500;
    line-height: var(--header-h);
    padding: 0 2px;
    transition: color 0.2s ease;
}
.nav__link:hover { color: var(--text-strong); }
.nav__link.active { color: var(--neon-green); text-shadow: 0 0 12px var(--neon-green-dim); }
.nav__link.active::after {
    content: '';
    position: absolute;
    left: 0;
    right: 0;
    bottom: 14px;
    height: 2px;
    border-radius: 2px;
    background: var(--neon-green);
    box-shadow: 0 0 8px var(--neon-green);
}
.nav__cta {
    min-height: 40px;
    padding: 10px 20px;
    font-size: 14px;
    border-radius: 10px;
    margin-left: 8px;
    line-height: 1;
}
.nav__burger {
    display: none;
    flex-direction: column;
    justify-content: center;
    gap: 6px;
    width: 44px;
    height: 44px;
    background: transparent;
    border: none;
    cursor: pointer;
    padding: 10px;
    border-radius: 8px;
}
.nav__burger:hover { background: rgba(255, 255, 255, 0.04); }
.nav__burger span { display: block; height: 2px; border-radius: 2px; background: var(--neon-green); transition: transform 0.3s ease, opacity 0.3s ease; }
.nav__burger.open span:first-child { transform: translateY(4px) rotate(45deg); }
.nav__burger.open span:last-child { transform: translateY(-4px) rotate(-45deg); }

/* ============ 主内容区 ============ */
main { padding-top: var(--header-h); }

/* ============ 面包屑 ============ */
.breadcrumb {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 8px;
    font-size: 14px;
    color: var(--text-muted);
    margin-bottom: 24px;
}
.breadcrumb a { color: var(--text-muted); transition: color 0.2s; }
.breadcrumb a:hover { color: var(--neon-green); }
.breadcrumb__sep { color: var(--text-muted); opacity: 0.5; }
.breadcrumb__current { color: var(--text-body); overflow: hidden; text-overflow: ellipsis; white-space: nowrap; max-width: 260px; }

/* ============ 文章 Hero ============ */
.article-hero {
    position: relative;
    padding: 56px 0 40px;
    background:
        radial-gradient(ellipse at 30% 20%, rgba(0, 230, 138, 0.06), transparent 50%),
        radial-gradient(ellipse at 80% 40%, rgba(169, 112, 255, 0.04), transparent 45%),
        url('/assets/images/backpic/back-1.webp') center/cover no-repeat,
        var(--bg-deep);
    border-bottom: 1px solid var(--border);
}
.article-hero::before {
    content: '';
    position: absolute;
    inset: 0;
    background: rgba(6, 10, 16, 0.72);
    pointer-events: none;
}
.article-hero .container { position: relative; z-index: 1; }
.article-heading__title {
    font-size: clamp(1.8rem, 4vw, 2.6rem);
    font-weight: 800;
    line-height: 1.25;
    color: var(--text-strong);
    letter-spacing: 0.01em;
    margin-bottom: 16px;
    max-width: 800px;
}
.article-meta {
    display: flex;
    flex-wrap: wrap;
    gap: 20px;
    font-size: 14px;
    color: var(--text-muted);
}
.article-meta__item { display: inline-flex; align-items: center; gap: 6px; }
.article-meta__icon { display: inline-block; width: 16px; height: 16px; opacity: 0.7; }

/* ============ 文章封面 ============ */
.article-cover {
    margin-top: 40px;
    margin-bottom: 8px;
}
.article-cover img {
    width: 100%;
    aspect-ratio: 16 / 8;
    object-fit: cover;
    border-radius: var(--radius-img);
    box-shadow: var(--shadow-card);
    border: 1px solid var(--border);
}
.article-cover__caption {
    text-align: center;
    font-size: 13px;
    color: var(--text-muted);
    margin-top: 10px;
}

/* ============ 文章正文 ============ */
.article-body {
    padding-top: 32px;
    padding-bottom: 16px;
    font-size: 16px;
    line-height: 2;
    color: var(--text-body);
    word-break: break-word;
}
.article-body > * + * { margin-top: 1.2em; }
.article-body h2 {
    font-size: 1.75rem;
    font-weight: 700;
    color: var(--text-strong);
    margin-top: 2em;
    margin-bottom: 0.8em;
    padding-bottom: 0.4em;
    position: relative;
    line-height: 1.4;
}
.article-body h2::after {
    content: '';
    position: absolute;
    left: 0;
    bottom: 0;
    width: 48px;
    height: 2px;
    border-radius: 2px;
    background: var(--neon-green);
    box-shadow: 0 0 8px var(--neon-green);
}
.article-body h3 {
    font-size: 1.4rem;
    font-weight: 700;
    color: var(--text-strong);
    margin-top: 1.6em;
    margin-bottom: 0.6em;
    line-height: 1.5;
}
.article-body p { margin-bottom: 0; }
.article-body a {
    color: var(--neon-green);
    text-decoration: underline;
    text-underline-offset: 3px;
}
.article-body a:hover { color: #00ff9a; }
.article-body blockquote {
    border-left: 3px solid var(--neon-green);
    background: rgba(0, 230, 138, 0.05);
    padding: 16px 20px;
    border-radius: 0 10px 10px 0;
    color: var(--text-body);
    font-style: normal;
    margin: 1.6em 0;
}
.article-body blockquote p { margin-bottom: 0; }
.article-body ul, .article-body ol { padding-left: 1.5em; margin: 1.2em 0; }
.article-body li { margin-bottom: 0.4em; }
.article-body img {
    border-radius: var(--radius-img);
    margin: 1.6em 0;
    box-shadow: var(--shadow-card);
    border: 1px solid var(--border);
}
.article-body table {
    width: 100%;
    border-collapse: collapse;
    margin: 1.6em 0;
    font-size: 15px;
}
.article-body th, .article-body td {
    border: 1px solid var(--border);
    padding: 10px 14px;
    text-align: left;
}
.article-body th {
    background: var(--bg-card);
    color: var(--text-strong);
    font-weight: 600;
}
.article-body tr:nth-child(even) td { background: rgba(255, 255, 255, 0.02); }
.article-body code {
    background: var(--bg-elevated);
    padding: 2px 6px;
    border-radius: 4px;
    font-size: 0.9em;
    color: var(--neon-green);
}
.article-body hr {
    border: none;
    height: 1px;
    background: var(--border);
    margin: 2em 0;
}

/* ============ 文章标签 ============ */
.article-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    padding-top: 24px;
    padding-bottom: 24px;
    border-bottom: 1px solid var(--border);
}
.tag {
    display: inline-flex;
    align-items: center;
    padding: 6px 14px;
    border-radius: 999px;
    font-size: 13px;
    font-weight: 500;
    color: var(--neon-purple);
    border: 1px solid rgba(169, 112, 255, 0.3);
    background: rgba(169, 112, 255, 0.06);
    transition: background 0.2s ease, border-color 0.2s ease;
}
.tag:hover { background: rgba(169, 112, 255, 0.12); border-color: rgba(169, 112, 255, 0.5); }

/* ============ 相关推荐 ============ */
.related-section {
    padding: 72px 0 40px;
    background: var(--bg-section);
    border-top: 1px solid var(--border);
}
.section-head {
    display: flex;
    align-items: center;
    gap: 16px;
    margin-bottom: 36px;
}
.section-head h2 {
    font-size: 1.75rem;
    font-weight: 700;
    color: var(--text-strong);
    position: relative;
}
.section-head__line {
    flex: 1;
    height: 1px;
    background: var(--border);
    position: relative;
}
.section-head__line::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    width: 80px;
    height: 1px;
    background: var(--neon-green);
    box-shadow: 0 0 8px var(--neon-green);
}
.related-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}
.related-card {
    display: flex;
    flex-direction: column;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-card);
    overflow: hidden;
    transition: transform 0.2s ease, box-shadow 0.2s ease, border-color 0.2s ease;
    color: var(--text-body);
}
.related-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-neon);
    border-color: var(--border-neon);
    color: var(--text-body);
}
.related-card__img {
    aspect-ratio: 16 / 9;
    overflow: hidden;
    background: var(--bg-section);
}
.related-card__img img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.3s ease;
}
.related-card:hover .related-card__img img { transform: scale(1.03); }
.related-card__body { padding: 20px 22px 18px; display: flex; flex-direction: column; gap: 10px; flex: 1; }
.related-card__body h3 {
    font-size: 1.0625rem;
    font-weight: 600;
    color: var(--text-strong);
    line-height: 1.5;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}
.related-card__time { font-size: 13px; color: var(--text-muted); }
.related-footer {
    text-align: center;
    padding-top: 40px;
}

/* ============ 空状态 ============ */
.empty-section {
    min-height: 65vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 80px 0;
    position: relative;
    background:
        radial-gradient(ellipse at center, rgba(0, 230, 138, 0.05), transparent 55%),
        var(--bg-body);
}
.empty-card {
    text-align: center;
    max-width: 480px;
    padding: 56px 40px;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-card);
    box-shadow: var(--shadow-card);
    position: relative;
}
.empty-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 60px;
    height: 2px;
    background: var(--neon-green);
    box-shadow: 0 0 10px var(--neon-green);
    border-radius: 2px;
}
.empty-card__icon {
    width: 56px;
    height: 56px;
    margin: 0 auto 20px;
    border-radius: 50%;
    border: 2px solid var(--border-neon);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 26px;
    font-weight: 700;
    color: var(--neon-green);
    line-height: 1;
}
.empty-card h1 {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-strong);
    margin-bottom: 12px;
}
.empty-card p { color: var(--text-muted); margin-bottom: 28px; font-size: 15px; }

/* ============ CTA 条 ============ */
.cta-band {
    position: relative;
    padding: 64px 0;
    background:
        radial-gradient(ellipse at 20% 50%, rgba(0, 230, 138, 0.08), transparent 45%),
        radial-gradient(ellipse at 80% 50%, rgba(169, 112, 255, 0.05), transparent 40%),
        var(--bg-deep);
    border-top: 1px solid var(--border);
    overflow: hidden;
}
.cta-band::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: linear-gradient(90deg, transparent, var(--border-neon), transparent);
}
.cta-band__inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 32px;
    flex-wrap: wrap;
}
.cta-band__text h2 {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-strong);
    margin-bottom: 6px;
}
.cta-band__text p { color: var(--text-muted); font-size: 15px; }

/* ============ Footer ============ */
.site-footer {
    background: var(--bg-deep);
    border-top: 1px solid var(--border);
    padding: 64px 0 32px;
}
.footer__grid {
    display: grid;
    grid-template-columns: 1.4fr 1fr 1fr 1.2fr;
    gap: 40px;
    margin-bottom: 48px;
}
.footer__brand .logo { margin-bottom: 16px; }
.footer__brand p { font-size: 14px; color: var(--text-muted); line-height: 1.9; margin-top: 14px; max-width: 320px; }
.footer__social { display: flex; gap: 12px; margin-top: 20px; }
.footer__social a {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    border: 1px solid var(--border);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    color: var(--text-muted);
    font-size: 14px;
    transition: all 0.2s ease;
}
.footer__social a:hover { border-color: var(--neon-green); color: var(--neon-green); box-shadow: 0 0 10px rgba(0, 230, 138, 0.2); }
.footer__heading {
    font-size: 15px;
    font-weight: 600;
    color: var(--text-strong);
    margin-bottom: 18px;
    position: relative;
    padding-bottom: 10px;
}
.footer__heading::after {
    content: '';
    position: absolute;
    left: 0;
    bottom: 0;
    width: 24px;
    height: 2px;
    background: var(--neon-green);
    border-radius: 2px;
}
.footer__links { list-style: none; padding: 0; display: flex; flex-direction: column; gap: 10px; }
.footer__links a {
    color: var(--text-muted);
    font-size: 14px;
    transition: color 0.2s ease, padding-left 0.2s ease;
}
.footer__links a:hover { color: var(--neon-green); padding-left: 4px; }
.footer__contact { list-style: none; padding: 0; display: flex; flex-direction: column; gap: 12px; font-size: 14px; color: var(--text-muted); }
.footer__contact li { line-height: 1.7; }
.footer__contact .label { color: var(--text-strong); font-weight: 500; }
.footer__bottom {
    border-top: 1px solid var(--border);
    padding-top: 24px;
    display: flex;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 12px;
    font-size: 13px;
    color: var(--text-muted);
}
.footer__bottom a { color: var(--text-muted); }
.footer__bottom a:hover { color: var(--neon-green); }

/* ============ 响应式 ============ */
@media (max-width: 1023px) {
    .footer__grid { grid-template-columns: 1fr 1fr; gap: 32px; }
    .related-grid { grid-template-columns: repeat(2, 1fr); }
    .nav { gap: 18px; }
    .nav__link { font-size: 14px; }
}
@media (max-width: 767px) {
    :root { --space-section: 48px; --header-h: 60px; }
    .container, .container-article { padding-left: 20px; padding-right: 20px; }
    .logo__main { font-size: 20px; }
    .logo__sub { font-size: 11px; }
    .nav {
        position: fixed;
        top: var(--header-h);
        left: 0;
        right: 0;
        bottom: 0;
        background: rgba(6, 10, 16, 0.98);
        flex-direction: column;
        align-items: flex-start;
        justify-content: flex-start;
        padding: 40px 24px 24px;
        gap: 8px;
        transform: translateX(100%);
        transition: transform 0.3s ease;
        z-index: 999;
        overflow-y: auto;
    }
    .nav--open { transform: translateX(0); }
    .nav__link {
        width: 100%;
        font-size: 22px;
        line-height: 1.6;
        padding: 14px 0;
        border-bottom: 1px solid var(--border);
    }
    .nav__link.active::after { display: none; }
    .nav__link.active { position: relative; padding-left: 16px; }
    .nav__link.active::before {
        content: '';
        position: absolute;
        left: 0;
        top: 14px;
        bottom: 14px;
        width: 4px;
        border-radius: 4px;
        background: var(--neon-green);
        box-shadow: 0 0 8px var(--neon-green);
    }
    .nav__cta { margin-left: 0; margin-top: 24px; width: 100%; min-height: 48px; justify-content: center; }
    .nav__burger { display: flex; }
    .breadcrumb { font-size: 13px; gap: 6px; }
    .breadcrumb__current { max-width: 160px; }
    .article-hero { padding: 32px 0 28px; }
    .article-heading__title { font-size: 1.6rem; }
    .article-meta { gap: 12px; font-size: 13px; }
    .article-cover { margin-top: 24px; }
    .article-cover img { aspect-ratio: 16 / 10; }
    .article-body { font-size: 16px; line-height: 1.9; padding-top: 20px; }
    .article-body h2 { font-size: 1.4rem; }
    .article-body h3 { font-size: 1.2rem; }
    .related-section { padding: 48px 0 32px; }
    .related-grid { grid-template-columns: 1fr; gap: 16px; }
    .section-head { margin-bottom: 24px; }
    .section-head h2 { font-size: 1.4rem; }
    .empty-section { padding: 48px 0; }
    .empty-card { padding: 40px 20px; }
    .cta-band { padding: 48px 0; }
    .cta-band__inner { flex-direction: column; text-align: center; }
    .footer__grid { grid-template-columns: 1fr; gap: 32px; }
    .footer__bottom { flex-direction: column; text-align: center; }
}
@media (max-width: 520px) {
    .container, .container-article { padding-left: 16px; padding-right: 16px; }
    .logo__sub { display: none; }
    .related-card__body { padding: 16px 16px 14px; }
    .related-card__body h3 { font-size: 1rem; }
}

/* roulang page: category2 */
:root {
  --bg-deep: #060A10;
  --bg-body: #080C14;
  --bg-section: #0D1420;
  --bg-card: #111A2B;
  --bg-elevated: #16213A;
  --neon-green: #00E68A;
  --neon-green-dim: rgba(0, 230, 138, 0.35);
  --neon-purple: #A970FF;
  --signal-orange: #FFAB2E;
  --error: #FF4D6F;
  --text-strong: #F2F6FC;
  --text-body: #B9C4D6;
  --text-muted: #7B8AA0;
  --border: rgba(255, 255, 255, 0.08);
  --border-neon: rgba(0, 230, 138, 0.4);
  --radius-card: 16px;
  --radius-sm: 10px;
  --shadow: 0 4px 24px rgba(0, 0, 0, 0.3);
  --shadow-neon: 0 0 20px rgba(0, 230, 138, 0.15);
  --font: -apple-system, "PingFang SC", "HarmonicOS Sans SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
  --space-section: 96px;
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font);
  font-size: 16px;
  line-height: 1.8;
  color: var(--text-body);
  background: var(--bg-body);
  -webkit-font-smoothing: antialiased;
}

a {
  color: inherit;
  text-decoration: none;
  transition: color 0.2s ease;
}

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

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

ul,
ol {
  list-style: none;
}

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

/* Header */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  height: 72px;
  background: rgba(6, 10, 16, 0.9);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
}

.header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
}

.logo {
  display: flex;
  flex-direction: column;
  line-height: 1.15;
  flex-shrink: 0;
}

.logo__main {
  font-size: 1.25rem;
  font-weight: 800;
  color: var(--text-strong);
  letter-spacing: 0.08em;
}

.logo__sub {
  font-size: 0.75rem;
  color: var(--text-muted);
  letter-spacing: 0.02em;
}

.nav {
  display: flex;
  align-items: center;
  gap: 28px;
}

.nav__link {
  position: relative;
  font-size: 15px;
  line-height: 1.2;
  color: var(--text-body);
  padding: 8px 0;
  transition: color 0.2s ease;
}

.nav__link:hover {
  color: var(--text-strong);
}

.nav__link.active {
  color: var(--neon-green);
}

.nav__link.active::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: -2px;
  height: 2px;
  background: var(--neon-green);
  box-shadow: 0 0 8px var(--neon-green-dim);
}

.nav__cta {
  margin-left: 8px;
}

.nav__burger {
  display: none;
  flex-direction: column;
  gap: 6px;
  padding: 8px;
  border-radius: 6px;
}

.nav__burger span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--neon-green);
  border-radius: 2px;
  transition: transform 0.25s ease, opacity 0.25s ease;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 12px 24px;
  border-radius: var(--radius-sm);
  font-weight: 700;
  font-size: 15px;
  line-height: 1;
  transition: all 0.2s ease;
}

.btn--primary {
  background: var(--neon-green);
  color: #000;
}

.btn--primary:hover {
  filter: brightness(1.1);
  box-shadow: 0 0 18px rgba(0, 230, 138, 0.4);
  transform: translateY(-2px);
}

.btn--primary:active {
  filter: brightness(0.95);
  transform: translateY(0);
}

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

.btn--ghost:hover {
  border-color: var(--neon-green);
  color: var(--text-strong);
  box-shadow: 0 0 14px rgba(0, 230, 138, 0.15);
  transform: translateY(-2px);
}

.btn--lg {
  padding: 15px 32px;
  font-size: 16px;
}

.btn:focus-visible {
  outline: 2px solid var(--neon-green-dim);
  outline-offset: 2px;
}

/* Hero */
.hero {
  position: relative;
  min-height: 520px;
  display: flex;
  align-items: center;
  padding: 140px 0 80px;
  overflow: hidden;
}

.hero::before {
  content: "";
  position: absolute;
  top: -120px;
  right: -80px;
  width: 420px;
  height: 420px;
  background: radial-gradient(circle, rgba(0, 230, 138, 0.05), transparent 70%);
  pointer-events: none;
}

.hero__bg {
  position: absolute;
  inset: 0;
  background-image: url("/assets/images/backpic/back-1.webp");
  background-size: cover;
  background-position: center;
  background-color: var(--bg-deep);
}

.hero__bg::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(90deg, rgba(6, 10, 16, 0.96) 0%, rgba(6, 10, 16, 0.82) 50%, rgba(6, 10, 16, 0.45) 100%);
}

.hero__inner {
  position: relative;
  z-index: 1;
  width: 100%;
}

.hero__tag {
  display: inline-block;
  padding: 6px 14px;
  border: 1px solid var(--border-neon);
  color: var(--neon-green);
  border-radius: 999px;
  font-size: 13px;
  letter-spacing: 0.06em;
  margin-bottom: 20px;
}

.hero h1 {
  color: var(--text-strong);
  font-size: clamp(2.1rem, 5vw, 3.6rem);
  font-weight: 800;
  line-height: 1.15;
  letter-spacing: 0.01em;
  max-width: 760px;
  margin-bottom: 18px;
}

.hero__sub {
  font-size: 1.1rem;
  color: var(--text-body);
  max-width: 560px;
  margin-bottom: 30px;
  line-height: 1.8;
}

.hero__actions {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
  margin-bottom: 40px;
}

.hero__trust {
  display: flex;
  gap: 28px;
  flex-wrap: wrap;
}

.hero__trust span {
  font-size: 13px;
  color: var(--text-muted);
  position: relative;
  padding-left: 16px;
}

.hero__trust span::before {
  content: "";
  position: absolute;
  left: 0;
  top: 50%;
  transform: translateY(-50%);
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--neon-green);
  box-shadow: 0 0 8px var(--neon-green-dim);
}

/* Section base */
.section {
  padding: var(--space-section) 0;
}

.section--alt {
  background: var(--bg-section);
}

.section__label {
  display: inline-block;
  font-size: 13px;
  font-weight: 600;
  color: var(--neon-green);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  margin-bottom: 10px;
}

.section h2 {
  font-size: 1.75rem;
  font-weight: 700;
  color: var(--text-strong);
  line-height: 1.3;
  margin-bottom: 40px;
  text-align: center;
}

.section__lead {
  color: var(--text-muted);
  max-width: 640px;
  text-align: center;
  margin: -20px auto 40px;
}

/* Split feature */
.split {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 56px;
  align-items: center;
}

.split__media {
  border-radius: 12px;
  overflow: hidden;
  box-shadow: var(--shadow);
  background: var(--bg-elevated);
}

.split__media img {
  width: 100%;
  height: 320px;
  object-fit: cover;
  transition: transform 0.4s ease;
}

.split__media:hover img {
  transform: scale(1.03);
}

.split__content h2 {
  text-align: left;
  margin-bottom: 16px;
}

.split__content p {
  margin-bottom: 16px;
  line-height: 1.9;
}

.check-list li {
  position: relative;
  padding: 8px 0 8px 28px;
  color: var(--text-body);
  font-size: 15px;
}

.check-list li::before {
  content: "";
  position: absolute;
  left: 4px;
  top: 16px;
  width: 8px;
  height: 14px;
  border-left: 2px solid var(--neon-green);
  border-bottom: 2px solid var(--neon-green);
  transform: rotate(-45deg);
}

/* Feature cards */
.feature-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}

.feature-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-card);
  padding: 28px;
  transition: all 0.25s ease;
}

.feature-card:hover {
  border-color: var(--border-neon);
  box-shadow: var(--shadow-neon);
  transform: translateY(-4px);
}

.feature-card__icon {
  font-size: 2rem;
  line-height: 1;
  margin-bottom: 14px;
  display: block;
}

.feature-card h3 {
  font-size: 1.125rem;
  font-weight: 600;
  color: var(--text-strong);
  margin-bottom: 10px;
}

.feature-card p {
  font-size: 0.875rem;
  color: var(--text-muted);
  line-height: 1.7;
}

/* Timeline */
.timeline {
  position: relative;
  max-width: 860px;
  margin: 0 auto;
  padding-left: 40px;
}

.timeline::before {
  content: "";
  position: absolute;
  left: 8px;
  top: 10px;
  bottom: 10px;
  width: 1px;
  background: var(--border);
}

.timeline__item {
  position: relative;
  padding: 24px 0 24px 32px;
}

.timeline__item::before {
  content: "";
  position: absolute;
  left: -36px;
  top: 32px;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--neon-green);
  box-shadow: 0 0 10px rgba(0, 230, 138, 0.5);
}

.timeline__step {
  display: inline-block;
  font-size: 12px;
  font-weight: 700;
  color: var(--neon-purple);
  letter-spacing: 0.06em;
  margin-bottom: 6px;
}

.timeline__item h3 {
  color: var(--text-strong);
  font-size: 1.125rem;
  font-weight: 600;
  margin-bottom: 8px;
}

.timeline__item p {
  font-size: 0.9375rem;
  color: var(--text-muted);
  line-height: 1.8;
}

/* Stats band */
.stats {
  padding: 48px 0;
  background: var(--bg-deep);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}

.stats__grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  text-align: center;
}

.stats__number {
  font-size: 2.5rem;
  font-weight: 800;
  color: var(--neon-green);
  line-height: 1.2;
}

.stats__label {
  font-size: 0.875rem;
  color: var(--text-muted);
  margin-top: 6px;
}

/* FAQ */
.faq {
  max-width: 760px;
  margin: 0 auto;
}

.faq__item {
  border: 1px solid var(--border);
  border-radius: 12px;
  margin-bottom: 12px;
  background: var(--bg-card);
  overflow: hidden;
  transition: border-color 0.25s ease, background 0.25s ease;
}

.faq__item.open {
  border-color: var(--border-neon);
  background: var(--bg-elevated);
}

.faq__q {
  width: 100%;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  padding: 18px 20px;
  font-size: 16px;
  font-weight: 600;
  color: var(--text-strong);
  text-align: left;
  transition: color 0.2s ease;
}

.faq__q:hover {
  color: var(--neon-green);
}

.faq__q:focus-visible {
  outline: 2px solid var(--neon-green-dim);
  outline-offset: -2px;
  border-radius: 12px;
}

.faq__icon {
  position: relative;
  width: 20px;
  height: 20px;
  flex-shrink: 0;
}

.faq__icon::before,
.faq__icon::after {
  content: "";
  position: absolute;
  background: var(--neon-green);
  border-radius: 2px;
  transition: transform 0.3s ease;
}

.faq__icon::before {
  left: 2px;
  right: 2px;
  top: 9px;
  height: 2px;
}

.faq__icon::after {
  top: 2px;
  bottom: 2px;
  left: 9px;
  width: 2px;
}

.faq__item.open .faq__icon::after {
  transform: scaleY(0);
}

.faq__a {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.3s ease;
}

.faq__a-inner {
  padding: 0 20px 18px;
  font-size: 14px;
  color: var(--text-body);
  line-height: 1.9;
  border-left: 3px solid var(--neon-green);
  margin-left: 20px;
}

/* CTA band */
.cta {
  position: relative;
  padding: 80px 0;
  text-align: center;
  background: var(--bg-section);
}

.cta::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--neon-green), var(--neon-purple), transparent);
}

.cta__inner {
  position: relative;
  z-index: 1;
}

.cta h2 {
  font-size: 2rem;
  color: var(--text-strong);
  margin-bottom: 12px;
}

.cta p {
  color: var(--text-muted);
  margin-bottom: 28px;
}

/* Footer */
.site-footer {
  background: var(--bg-deep);
  border-top: 1px solid var(--border);
  padding: 64px 0 32px;
}

.footer__grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1.2fr;
  gap: 40px;
  margin-bottom: 48px;
}

.footer__brand p {
  font-size: 0.875rem;
  color: var(--text-muted);
  margin: 16px 0;
  max-width: 280px;
  line-height: 1.8;
}

.footer__social {
  display: flex;
  gap: 12px;
}

.footer__social a {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border-radius: 50%;
  border: 1px solid var(--border);
  color: var(--text-muted);
  font-size: 13px;
  transition: all 0.2s ease;
}

.footer__social a:hover {
  border-color: var(--neon-green);
  color: var(--neon-green);
  box-shadow: 0 0 10px rgba(0, 230, 138, 0.2);
}

.footer__heading {
  font-size: 15px;
  font-weight: 600;
  color: var(--text-strong);
  margin-bottom: 18px;
}

.footer__links li,
.footer__contact li {
  margin-bottom: 10px;
}

.footer__links a,
.footer__contact {
  font-size: 0.875rem;
  color: var(--text-muted);
  transition: color 0.2s ease;
}

.footer__links a:hover {
  color: var(--neon-green);
}

.footer__contact .label {
  color: var(--text-body);
}

.footer__bottom {
  border-top: 1px solid var(--border);
  padding-top: 24px;
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
}

.footer__bottom p {
  font-size: 0.8125rem;
  color: var(--text-muted);
}

.footer__bottom a {
  color: var(--text-body);
}

.footer__bottom a:hover {
  color: var(--neon-green);
}

/* Responsive */
@media (max-width: 1024px) {
  :root {
    --space-section: 72px;
  }

  .feature-grid {
    grid-template-columns: repeat(2, 1fr);
  }

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

@media (max-width: 767px) {
  :root {
    --space-section: 48px;
  }

  .site-header {
    height: 60px;
  }

  .nav {
    position: fixed;
    top: 60px;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(6, 10, 16, 0.98);
    flex-direction: column;
    justify-content: center;
    align-items: center;
    gap: 28px;
    transform: translateX(100%);
    transition: transform 0.3s ease;
    z-index: 99;
  }

  .nav.open {
    transform: translateX(0);
  }

  .nav__link {
    font-size: 1.4rem;
  }

  .nav__cta {
    margin-top: 12px;
  }

  .nav__burger {
    display: flex;
  }

  .nav__burger.open span:first-child {
    transform: translateY(4px) rotate(45deg);
  }

  .nav__burger.open span:last-child {
    transform: translateY(-4px) rotate(-45deg);
  }

  .hero {
    padding: 100px 0 60px;
    min-height: auto;
  }

  .hero h1 {
    font-size: 1.8rem;
  }

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

  .hero__actions .btn {
    width: 100%;
  }

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

  .split__media img {
    height: 240px;
  }

  .stats__grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 32px 16px;
  }

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

  .footer__bottom {
    flex-direction: column;
    text-align: center;
  }

  .cta h2 {
    font-size: 1.5rem;
  }
}

@media (max-width: 520px) {
  .feature-grid {
    grid-template-columns: 1fr;
  }

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

  .hero__trust {
    gap: 12px;
  }

  .timeline {
    padding-left: 24px;
  }

  .timeline__item {
    padding-left: 24px;
  }

  .timeline__item::before {
    left: -24px;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation: none !important;
    transition: none !important;
    scroll-behavior: auto !important;
  }
}

/* roulang page: category3 */
:root{
  --bg-deep:#060A10;
  --bg-body:#080C14;
  --bg-section:#0D1420;
  --bg-card:#111A2B;
  --bg-elevated:#16213A;
  --neon-green:#00E68A;
  --neon-green-dim:rgba(0,230,138,.35);
  --neon-purple:#A970FF;
  --signal-orange:#FFAB2E;
  --error:#FF4D6F;
  --text-strong:#F2F6FC;
  --text-body:#B9C4D6;
  --text-muted:#7B8AA0;
  --border:rgba(255,255,255,.08);
  --border-neon:rgba(0,230,138,.4);
  --radius-card:16px;
  --radius-btn:10px;
  --radius-input:10px;
  --radius-pill:999px;
  --shadow-card:0 4px 24px rgba(0,0,0,.3);
  --shadow-neon:0 0 20px rgba(0,230,138,.15);
  --transition:.2s ease;
  --header-h:72px;
  --container:1200px;
}
*,*::before,*::after{
  margin:0;
  padding:0;
  box-sizing:border-box;
}
html{
  scroll-behavior:smooth;
}
body{
  background:var(--bg-body);
  color:var(--text-body);
  font-family:-apple-system,"PingFang SC","HarmonicOS Sans SC","Microsoft YaHei","Noto Sans SC",sans-serif;
  font-size:1rem;
  line-height:1.8;
  -webkit-font-smoothing:antialiased;
}
img{
  max-width:100%;
  display:block;
  border-radius:12px;
}
a{
  color:var(--text-body);
  text-decoration:none;
  transition:color var(--transition);
}
a:hover{
  color:var(--text-strong);
}
button{
  font-family:inherit;
  cursor:pointer;
}
.container{
  max-width:var(--container);
  margin:0 auto;
  padding:0 24px;
}
.site-header{
  position:fixed;
  top:0;
  left:0;
  right:0;
  z-index:100;
  height:var(--header-h);
  background:rgba(6,10,16,.92);
  backdrop-filter:blur(12px);
  -webkit-backdrop-filter:blur(12px);
  border-bottom:1px solid var(--border);
}
.header__inner{
  height:var(--header-h);
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:24px;
}
.logo{
  display:inline-flex;
  align-items:baseline;
  gap:8px;
  white-space:nowrap;
}
.logo__main{
  font-size:1.4rem;
  font-weight:800;
  letter-spacing:.08em;
  color:var(--text-strong);
}
.logo__sub{
  font-size:.75rem;
  color:var(--text-muted);
  letter-spacing:.04em;
}
.logo::after{
  content:"";
  width:6px;
  height:6px;
  border-radius:50%;
  background:var(--neon-green);
  box-shadow:0 0 8px var(--neon-green-dim);
  align-self:center;
  margin-left:2px;
}
.nav{
  display:flex;
  align-items:center;
  gap:4px;
}
.nav__link{
  display:inline-flex;
  align-items:center;
  height:var(--header-h);
  padding:0 18px;
  font-size:.9375rem;
  color:var(--text-body);
  position:relative;
  transition:color var(--transition);
}
.nav__link:hover{
  color:var(--text-strong);
}
.nav__link.active{
  color:var(--neon-green);
}
.nav__link.active::after{
  content:"";
  position:absolute;
  left:14px;
  right:14px;
  bottom:0;
  height:2px;
  background:var(--neon-green);
  box-shadow:0 0 12px var(--neon-green-dim);
  border-radius:2px 2px 0 0;
}
.nav__cta{
  margin-left:12px;
}
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  padding:12px 24px;
  border-radius:var(--radius-btn);
  font-size:.9375rem;
  font-weight:700;
  line-height:1.2;
  border:none;
  transition:transform var(--transition),box-shadow var(--transition),background var(--transition),border-color var(--transition),color var(--transition);
}
.btn--primary{
  background:var(--neon-green);
  color:#060A10;
}
.btn--primary:hover{
  background:#00f79a;
  color:#060A10;
  box-shadow:0 0 18px rgba(0,230,138,.4);
  transform:translateY(-1px);
}
.btn--primary:active{
  background:#00cc74;
  transform:translateY(0);
}
.btn--primary:focus-visible{
  outline:none;
  box-shadow:0 0 0 4px var(--neon-green-dim);
}
.btn--ghost{
  background:transparent;
  border:1px solid var(--border);
  color:var(--text-strong);
}
.btn--ghost:hover{
  border-color:var(--neon-green);
  color:var(--text-strong);
  box-shadow:0 0 16px rgba(0,230,138,.12);
}
.btn--ghost:focus-visible{
  outline:none;
  border-color:var(--neon-green);
  box-shadow:0 0 0 3px var(--neon-green-dim);
}
.btn--large{
  padding:16px 32px;
  font-size:1rem;
}
.btn:disabled{
  opacity:.4;
  pointer-events:none;
}
.nav__burger{
  display:none;
  width:48px;
  height:48px;
  background:transparent;
  border:none;
  flex-direction:column;
  align-items:center;
  justify-content:center;
  gap:6px;
}
.nav__burger span{
  display:block;
  width:24px;
  height:2px;
  border-radius:2px;
  background:var(--neon-green);
  transition:transform .25s ease,opacity .25s ease;
}
.nav__burger.open span:first-child{
  transform:translateY(4px) rotate(45deg);
}
.nav__burger.open span:last-child{
  transform:translateY(-4px) rotate(-45deg);
}
@media (max-width:767px){
  .nav{
    position:fixed;
    top:60px;
    left:0;
    right:0;
    height:calc(100vh - 60px);
    background:var(--bg-deep);
    flex-direction:column;
    align-items:stretch;
    justify-content:flex-start;
    padding:32px 24px;
    gap:8px;
    transform:translateX(100%);
    transition:transform .3s ease;
    overflow-y:auto;
    z-index:99;
  }
  .nav.open{
    transform:translateX(0);
  }
  .nav__link{
    height:auto;
    padding:16px 20px;
    font-size:1.375rem;
    border-radius:10px;
  }
  .nav__link.active{
    background:rgba(0,230,138,.06);
    box-shadow:inset 4px 0 0 var(--neon-green);
  }
  .nav__link.active::after{
    display:none;
  }
  .nav__cta{
    margin:16px 0 0;
    justify-content:center;
    height:auto;
  }
  .nav__burger{
    display:flex;
  }
}
@media (max-width:1024px){
  .container{
    padding:0 20px;
  }
  .nav__link{
    padding:0 12px;
    font-size:.875rem;
  }
}
.hero{
  position:relative;
  padding:160px 0 120px;
  background:var(--bg-deep);
  overflow:hidden;
}
.cat-hero{
  padding:140px 0 100px;
}
.hero__bg{
  position:absolute;
  inset:0;
  background-size:cover;
  background-position:center;
  opacity:.38;
}
.hero__bg::after{
  content:"";
  position:absolute;
  inset:0;
  background:linear-gradient(90deg,rgba(6,10,16,.92) 0%,rgba(6,10,16,.72) 45%,rgba(6,10,16,.35) 100%);
}
.hero__inner{
  position:relative;
  z-index:1;
  max-width:860px;
}
.hero__tag{
  display:inline-flex;
  align-items:center;
  gap:8px;
  padding:7px 16px;
  border-radius:var(--radius-pill);
  border:1px solid var(--border-neon);
  background:rgba(0,230,138,.06);
  color:var(--neon-green);
  font-size:.8125rem;
  font-weight:600;
  letter-spacing:.05em;
  margin-bottom:24px;
}
.hero__tag::before{
  content:"";
  width:6px;
  height:6px;
  border-radius:50%;
  background:var(--neon-green);
  box-shadow:0 0 8px var(--neon-green-dim);
}
.hero h1{
  font-size:clamp(2rem,4.6vw,3.2rem);
  font-weight:800;
  line-height:1.18;
  letter-spacing:.01em;
  color:var(--text-strong);
  margin-bottom:20px;
}
.hero__sub{
  font-size:1.125rem;
  line-height:1.9;
  color:var(--text-body);
  max-width:640px;
  margin-bottom:36px;
}
.hero__actions{
  display:flex;
  flex-wrap:wrap;
  gap:16px;
}
.section{
  padding:96px 0;
  background:var(--bg-body);
}
.section--alt{
  background:var(--bg-section);
}
.section__head{
  max-width:720px;
  margin-bottom:52px;
}
.section__head h2{
  font-size:1.75rem;
  font-weight:700;
  color:var(--text-strong);
  line-height:1.3;
  margin-bottom:12px;
}
.section__lead{
  color:var(--text-muted);
  font-size:1rem;
  line-height:1.8;
}
.section h2{
  font-size:1.75rem;
  font-weight:700;
  color:var(--text-strong);
  line-height:1.3;
  margin-bottom:12px;
}
.section > .container > .section__lead{
  margin-bottom:48px;
}
.feature-grid{
  display:flex;
  flex-direction:column;
  gap:20px;
}
.feature-card{
  background:var(--bg-card);
  border:1px solid var(--border);
  border-radius:var(--radius-card);
  padding:28px 32px;
  display:flex;
  align-items:flex-start;
  gap:24px;
  max-width:70%;
  transition:border-color var(--transition),box-shadow var(--transition),transform var(--transition);
}
.feature-card:nth-child(odd){
  margin-right:auto;
  margin-left:15%;
}
.feature-card:nth-child(even){
  margin-left:auto;
  margin-right:15%;
}
.feature-card:hover{
  border-color:var(--border-neon);
  box-shadow:var(--shadow-neon);
  transform:translateY(-4px);
}
.feature-card__num{
  font-size:2rem;
  font-weight:800;
  line-height:1;
  font-family:"SF Mono",Consolas,monospace;
  letter-spacing:.02em;
  flex-shrink:0;
}
.feature-card:nth-child(odd) .feature-card__num{
  color:var(--neon-green);
}
.feature-card:nth-child(even) .feature-card__num{
  color:var(--neon-purple);
}
.feature-card__body h3{
  font-size:1.125rem;
  font-weight:700;
  color:var(--text-strong);
  margin-bottom:8px;
  line-height:1.4;
}
.feature-card__body p{
  font-size:.9375rem;
  color:var(--text-muted);
  line-height:1.8;
}
@media (max-width:767px){
  .feature-card,.feature-card:nth-child(odd),.feature-card:nth-child(even){
    max-width:100%;
    margin-left:0;
    margin-right:0;
    flex-direction:column;
    gap:16px;
    padding:24px 22px;
  }
}
.steps{
  position:relative;
  list-style:none;
  display:flex;
  flex-direction:column;
  gap:0;
  padding-left:0;
}
.steps::before{
  content:"";
  position:absolute;
  left:19px;
  top:10px;
  bottom:10px;
  width:1px;
  background:var(--border);
}
.steps__item{
  position:relative;
  padding-left:60px;
  padding-bottom:40px;
}
.steps__item:last-child{
  padding-bottom:0;
}
.steps__dot{
  position:absolute;
  left:12px;
  top:6px;
  width:14px;
  height:14px;
  border-radius:50%;
  background:var(--neon-green);
  box-shadow:0 0 0 6px rgba(0,230,138,.12),0 0 16px var(--neon-green-dim);
  border:2px solid var(--bg-section);
}
.steps__item h3{
  font-size:1.125rem;
  font-weight:700;
  color:var(--text-strong);
  margin-bottom:6px;
}
.steps__item p{
  font-size:.9375rem;
  color:var(--text-muted);
  line-height:1.8;
  max-width:620px;
}
.split{
  display:grid;
  grid-template-columns:1fr 1fr;
  gap:48px;
  align-items:center;
}
.split__content h2{
  font-size:1.75rem;
  font-weight:700;
  color:var(--text-strong);
  line-height:1.3;
  margin-bottom:16px;
}
.split__content p{
  color:var(--text-body);
  line-height:1.9;
  margin-bottom:16px;
}
.split__media{
  overflow:hidden;
  border-radius:16px;
  border:1px solid var(--border);
  position:relative;
}
.split__media img{
  width:100%;
  height:100%;
  object-fit:cover;
  border-radius:16px;
  transition:transform .35s ease;
}
.split__media:hover img{
  transform:scale(1.03);
}
@media (max-width:767px){
  .split{
    grid-template-columns:1fr;
    gap:28px;
  }
}
.tips{
  list-style:none;
  display:grid;
  grid-template-columns:1fr 1fr;
  gap:16px;
}
.tips__item{
  background:var(--bg-card);
  border:1px solid var(--border);
  border-radius:var(--radius-card);
  padding:22px 24px;
  display:flex;
  gap:16px;
  align-items:flex-start;
  transition:border-color var(--transition),box-shadow var(--transition);
}
.tips__item:hover{
  border-color:var(--border-neon);
  box-shadow:var(--shadow-neon);
}
.tips__icon{
  width:32px;
  height:32px;
  border-radius:8px;
  background:rgba(169,112,255,.12);
  color:var(--neon-purple);
  display:flex;
  align-items:center;
  justify-content:center;
  font-size:1rem;
  font-weight:800;
  flex-shrink:0;
}
.tips__item p{
  font-size:.9375rem;
  color:var(--text-body);
  line-height:1.75;
}
@media (max-width:767px){
  .tips{
    grid-template-columns:1fr;
  }
}
.faq{
  max-width:820px;
  margin:0 auto;
  display:flex;
  flex-direction:column;
  gap:14px;
}
.faq__item{
  background:var(--bg-card);
  border:1px solid var(--border);
  border-radius:var(--radius-card);
  overflow:hidden;
  transition:border-color var(--transition),box-shadow var(--transition);
}
.faq__item:hover{
  border-color:var(--border-neon);
}
.faq__item.open{
  background:var(--bg-elevated);
  border-left:3px solid var(--neon-green);
}
.faq__question{
  width:100%;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:16px;
  padding:18px 22px;
  background:transparent;
  border:none;
  text-align:left;
  color:var(--text-strong);
  font-size:1rem;
  font-weight:600;
  line-height:1.5;
}
.faq__icon{
  width:28px;
  height:28px;
  border-radius:50%;
  background:rgba(0,230,138,.08);
  color:var(--neon-green);
  display:flex;
  align-items:center;
  justify-content:center;
  font-size:1.125rem;
  flex-shrink:0;
  transition:transform .3s ease,background .3s ease;
}
.faq__item.open .faq__icon{
  transform:rotate(45deg);
  background:var(--neon-green);
  color:#060A10;
}
.faq__answer{
  max-height:0;
  overflow:hidden;
  transition:max-height .3s ease;
}
.faq__answer-inner{
  padding:0 22px 20px;
  color:var(--text-body);
  font-size:.875rem;
  line-height:1.9;
}
.faq__answer-inner p + p{
  margin-top:10px;
}
.cta{
  background:var(--bg-deep);
  border-top:1px solid var(--border);
  position:relative;
  padding:80px 0;
  overflow:hidden;
}
.cta::before{
  content:"";
  position:absolute;
  top:0;
  left:0;
  right:0;
  height:1px;
  background:linear-gradient(90deg,transparent,var(--neon-green),transparent);
}
.cta__inner{
  position:relative;
  text-align:center;
  max-width:640px;
  margin:0 auto;
}
.cta h2{
  font-size:1.75rem;
  font-weight:700;
  color:var(--text-strong);
  margin-bottom:16px;
}
.cta p{
  color:var(--text-muted);
  margin-bottom:32px;
  font-size:1rem;
}
.site-footer{
  background:var(--bg-deep);
  border-top:1px solid var(--border);
  padding:64px 0 32px;
}
.footer__grid{
  display:grid;
  grid-template-columns:2fr 1fr 1fr 1.4fr;
  gap:40px;
  padding-bottom:48px;
}
.footer__brand p{
  margin-top:16px;
  color:var(--text-muted);
  font-size:.875rem;
  line-height:1.85;
  max-width:320px;
}
.footer__social{
  display:flex;
  gap:12px;
  margin-top:20px;
}
.footer__social a{
  width:38px;
  height:38px;
  border-radius:50%;
  border:1px solid var(--border);
  display:inline-flex;
  align-items:center;
  justify-content:center;
  font-size:.8125rem;
  color:var(--text-muted);
  transition:border-color var(--transition),color var(--transition),box-shadow var(--transition);
}
.footer__social a:hover{
  border-color:var(--neon-green);
  color:var(--neon-green);
  box-shadow:0 0 12px rgba(0,230,138,.15);
}
.footer__heading{
  font-size:1rem;
  font-weight:700;
  color:var(--text-strong);
  margin-bottom:16px;
}
.footer__links{
  list-style:none;
}
.footer__links li{
  margin-bottom:10px;
}
.footer__links a{
  font-size:.875rem;
  color:var(--text-muted);
  transition:color var(--transition);
}
.footer__links a:hover{
  color:var(--neon-green);
}
.footer__contact{
  list-style:none;
}
.footer__contact li{
  font-size:.875rem;
  color:var(--text-muted);
  margin-bottom:10px;
  line-height:1.7;
}
.footer__contact .label{
  color:var(--text-strong);
}
.footer__bottom{
  border-top:1px solid var(--border);
  padding-top:24px;
  display:flex;
  flex-wrap:wrap;
  justify-content:space-between;
  gap:12px;
  font-size:.8125rem;
  color:var(--text-muted);
}
.footer__bottom a{
  color:var(--text-muted);
}
.footer__bottom a:hover{
  color:var(--neon-green);
}
@media (max-width:1024px){
  .footer__grid{
    grid-template-columns:1fr 1fr;
  }
}
@media (max-width:767px){
  .section{
    padding:48px 0;
  }
  .hero{
    padding:110px 0 72px;
  }
  .cat-hero{
    padding:110px 0 72px;
  }
  .hero h1{
    font-size:1.8rem;
  }
  .hero__sub{
    font-size:1rem;
  }
  .hero__actions{
    flex-direction:column;
    align-items:stretch;
  }
  .section h2,.split__content h2,.cta h2{
    font-size:1.4rem;
  }
  .footer__grid{
    grid-template-columns:1fr;
    gap:32px;
  }
  .footer__bottom{
    flex-direction:column;
    justify-content:center;
    text-align:center;
  }
  .btn--large{
    width:100%;
  }
}
@media (prefers-reduced-motion:reduce){
  *{
    animation:none!important;
    transition:none!important;
  }
  html{
    scroll-behavior:auto;
  }
}