/* roulang page: index */
:root {
  --brand-950: #0D1A16;
  --brand-900: #13261F;
  --brand-800: #1B3A30;
  --brand-700: #245343;
  --brand-600: #2C6B58;
  --brand-500: #3D8972;
  --brand-50: #EAF2EE;
  --gold-600: #A97C3A;
  --gold-500: #C6A15B;
  --gold-400: #D9BE80;
  --ink: #17241F;
  --muted: #5B6B64;
  --line: #DCE4DF;
  --paper: #F6F4EF;
  --white: #FFFFFF;
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: "PingFang SC", "HarmonyOS Sans SC", "Microsoft YaHei", "Noto Sans SC", "Helvetica Neue", Arial, sans-serif;
  font-size: 16px;
  line-height: 1.75;
  color: var(--ink);
  background: var(--paper);
  -webkit-font-smoothing: antialiased;
}

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

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

button {
  font-family: inherit;
  cursor: pointer;
}

.container {
  max-width: 1280px;
  margin: 0 auto;
  padding-left: 24px;
  padding-right: 24px;
}
@media (min-width: 1024px) {
  .container {
    padding-left: 32px;
    padding-right: 32px;
  }
}

.section {
  padding: 80px 0;
}
@media (min-width: 768px) {
  .section {
    padding: 120px 0;
  }
}

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

.section-header {
  margin-bottom: 48px;
}
@media (min-width: 768px) {
  .section-header {
    margin-bottom: 56px;
  }
}
.section-tag {
  display: inline-block;
  font-size: 12px;
  letter-spacing: 0.25em;
  color: var(--brand-700);
  font-weight: 600;
  margin-bottom: 12px;
}
.section-title {
  font-size: 32px;
  line-height: 1.2;
  font-weight: 600;
  letter-spacing: -0.02em;
  color: var(--ink);
}
@media (min-width: 768px) {
  .section-title {
    font-size: 40px;
  }
}
.section-desc {
  color: var(--muted);
  max-width: 560px;
  margin-top: 14px;
  line-height: 1.75;
  font-size: 16px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 24px;
  font-size: 14px;
  font-weight: 500;
  border-radius: 4px;
  border: 1px solid transparent;
  transition: all 0.25s ease;
  text-decoration: none;
  min-height: 44px;
  white-space: nowrap;
}
.btn:focus-visible {
  outline: 2px solid var(--brand-600);
  outline-offset: 2px;
}
.btn-primary {
  background: var(--brand-900);
  color: var(--white);
  border-color: var(--brand-900);
}
.btn-primary:hover {
  background: var(--brand-700);
  border-color: var(--brand-700);
}
.btn-primary:active {
  background: var(--brand-800);
}
.btn-outline {
  background: transparent;
  color: var(--ink);
  border-color: var(--line);
}
.btn-outline:hover {
  border-color: var(--ink);
  color: var(--ink);
}
.btn-outline:active {
  background: var(--brand-50);
}
.btn-gold {
  background: var(--gold-500);
  color: var(--brand-950);
  border-color: var(--gold-500);
}
.btn-gold:hover {
  background: var(--gold-400);
  border-color: var(--gold-400);
}
.btn-gold:active {
  background: var(--gold-600);
}
.btn-ghost {
  background: transparent;
  color: var(--white);
  border-color: rgba(255,255,255,0.35);
}
.btn-ghost:hover {
  border-color: var(--white);
  color: var(--white);
}
.btn-ghost:active {
  background: rgba(255,255,255,0.1);
}

/* Header */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(246,244,239,0.85);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--line);
}
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
}
@media (min-width: 768px) {
  .header-inner {
    height: 80px;
  }
}
.logo {
  display: flex;
  align-items: baseline;
  gap: 4px;
  text-decoration: none;
}
.logo-main {
  font-size: 22px;
  font-weight: 700;
  color: var(--brand-800);
  letter-spacing: -0.02em;
}
.logo-sub {
  font-size: 13px;
  font-weight: 400;
  color: var(--muted);
  letter-spacing: 0.02em;
}
.main-nav {
  display: none;
  align-items: center;
  gap: 4px;
}
@media (min-width: 1024px) {
  .main-nav {
    display: flex;
  }
}
.nav-link {
  position: relative;
  padding: 8px 14px;
  font-size: 14px;
  letter-spacing: 0.02em;
  color: rgba(23,36,31,0.6);
  text-decoration: none;
  transition: color 0.2s;
}
.nav-link:hover {
  color: var(--ink);
}
.nav-link.active {
  color: var(--ink);
  font-weight: 500;
}
.nav-link.active::after {
  content: '';
  position: absolute;
  left: 14px;
  right: 14px;
  bottom: -2px;
  height: 2px;
  background: var(--brand-700);
}
.header-cta {
  display: none;
}
@media (min-width: 1024px) {
  .header-cta {
    display: inline-flex;
  }
}
.menu-toggle {
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 40px;
  height: 40px;
  background: none;
  border: none;
  padding: 0;
}
.menu-toggle span {
  display: block;
  width: 20px;
  height: 1.5px;
  background: var(--ink);
  transition: transform 0.3s ease;
}
.menu-toggle.active span:nth-child(1) {
  transform: translateY(6.5px) rotate(45deg);
}
.menu-toggle.active span:nth-child(2) {
  transform: translateY(-6.5px) rotate(-45deg);
}
@media (min-width: 1024px) {
  .menu-toggle {
    display: none;
  }
}

/* Mobile nav */
@media (max-width: 1023px) {
  .main-nav {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--paper);
    border-bottom: 1px solid var(--line);
    padding: 16px 24px 24px;
    flex-direction: column;
    align-items: stretch;
    gap: 4px;
    display: none;
  }
  .main-nav.open {
    display: flex;
  }
  .main-nav .nav-link {
    padding: 14px 8px;
    border-bottom: 1px solid rgba(220,228,223,0.6);
  }
  .main-nav .nav-link.active::after {
    display: none;
  }
  .main-nav .nav-link.active {
    color: var(--brand-700);
    background: var(--brand-50);
    border-radius: 4px;
  }
}

/* Hero */
.hero {
  position: relative;
  background: var(--paper);
  padding: 80px 0 64px;
  overflow: hidden;
}
@media (min-width: 768px) {
  .hero {
    padding: 112px 0 80px;
  }
}
.hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image: radial-gradient(rgba(13,26,22,0.07) 1px, transparent 1px);
  background-size: 24px 24px;
  pointer-events: none;
  z-index: 0;
}
.hero-inner {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: 1fr;
  gap: 48px;
  align-items: center;
}
@media (min-width: 1024px) {
  .hero-inner {
    grid-template-columns: 7fr 5fr;
    gap: 64px;
  }
}
.hero-tag {
  display: inline-block;
  font-size: 13px;
  letter-spacing: 0.12em;
  color: var(--brand-700);
  background: var(--brand-50);
  border-radius: 999px;
  padding: 6px 16px;
  margin-bottom: 20px;
  font-weight: 500;
}
.hero-title {
  font-size: 44px;
  line-height: 1.15;
  font-weight: 700;
  letter-spacing: -0.03em;
  color: var(--ink);
  margin-bottom: 20px;
}
@media (min-width: 768px) {
  .hero-title {
    font-size: 64px;
  }
}
.hero-title .highlight {
  color: var(--brand-700);
}
.hero-sub {
  font-size: 17px;
  line-height: 1.75;
  color: var(--muted);
  max-width: 520px;
  margin-bottom: 32px;
}
@media (min-width: 768px) {
  .hero-sub {
    font-size: 18px;
  }
}
.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  margin-bottom: 40px;
}
.hero-trust {
  display: flex;
  gap: 32px;
  border-top: 1px solid var(--line);
  padding-top: 24px;
}
.hero-trust div {
  display: flex;
  flex-direction: column;
}
.hero-trust strong {
  font-size: 22px;
  font-weight: 700;
  color: var(--ink);
  font-variant-numeric: tabular-nums;
}
.hero-trust span {
  font-size: 13px;
  color: var(--muted);
}
.hero-image {
  position: relative;
}
.hero-image img {
  width: 100%;
  aspect-ratio: 4 / 5;
  object-fit: cover;
  border: 1px solid var(--line);
  border-radius: 4px;
}
.hero-float-card {
  position: absolute;
  bottom: 20px;
  left: 16px;
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: 4px;
  padding: 14px 20px;
  box-shadow: 0 8px 24px rgba(13,26,22,0.08);
  display: flex;
  flex-direction: column;
  gap: 2px;
}
@media (min-width: 768px) {
  .hero-float-card {
    left: -24px;
    bottom: 32px;
  }
}
.hero-float-card span {
  font-size: 12px;
  color: var(--muted);
}
.hero-float-card strong {
  font-size: 16px;
  font-weight: 600;
  color: var(--brand-700);
}

/* Quick anchors */
.quick-anchors {
  background: var(--white);
  border-bottom: 1px solid var(--line);
}
.quick-anchors-inner {
  display: flex;
  gap: 8px;
  padding: 12px 24px;
  overflow-x: auto;
  scrollbar-width: none;
}
.quick-anchors-inner::-webkit-scrollbar {
  display: none;
}
.quick-anchors a {
  display: inline-block;
  padding: 6px 14px;
  font-size: 14px;
  color: var(--muted);
  border-radius: 999px;
  white-space: nowrap;
  text-decoration: none;
  transition: all 0.2s;
}
.quick-anchors a:hover {
  color: var(--brand-700);
  background: var(--brand-50);
}

/* Feature list */
.features-wrap {
  display: grid;
  grid-template-columns: 1fr;
  gap: 48px;
}
@media (min-width: 1024px) {
  .features-wrap {
    grid-template-columns: 5fr 7fr;
    gap: 72px;
  }
}
.feature-list {
  border-top: 1px solid var(--line);
}
.feature-item {
  display: flex;
  gap: 20px;
  padding: 28px 0;
  border-bottom: 1px solid var(--line);
  transition: background 0.3s ease;
}
.feature-item:hover {
  background: var(--brand-50);
}
.feature-num {
  font-size: 13px;
  font-weight: 600;
  color: var(--gold-600);
  min-width: 32px;
  padding-top: 4px;
  font-variant-numeric: tabular-nums;
}
.feature-content h3 {
  font-size: 19px;
  font-weight: 600;
  color: var(--ink);
  margin-bottom: 8px;
}
.feature-content p {
  color: var(--muted);
  line-height: 1.75;
  font-size: 15px;
  max-width: 540px;
}

/* Showcase */
.showcase-hero {
  margin-bottom: 56px;
  border: 1px solid var(--line);
  border-radius: 4px;
  overflow: hidden;
}
.showcase-hero img {
  width: 100%;
  aspect-ratio: 16 / 8;
  object-fit: cover;
}
.showcase-rows {
  display: flex;
  flex-direction: column;
  gap: 56px;
}
.showcase-row {
  display: grid;
  grid-template-columns: 1fr;
  gap: 32px;
  align-items: center;
}
@media (min-width: 1024px) {
  .showcase-row {
    grid-template-columns: 1fr 1fr;
    gap: 56px;
  }
}
.row-text h3 {
  font-size: 24px;
  font-weight: 600;
  letter-spacing: -0.01em;
  margin-bottom: 12px;
}
.row-text p {
  color: var(--muted);
  line-height: 1.8;
  margin-bottom: 20px;
}
.row-text ul {
  list-style: none;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.row-text ul li {
  position: relative;
  padding-left: 24px;
  color: var(--ink);
  font-size: 15px;
}
.row-text ul li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 8px;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--brand-500);
}
.row-img {
  border: 1px solid var(--line);
  border-radius: 4px;
  overflow: hidden;
}
.row-img img {
  width: 100%;
  aspect-ratio: 4 / 3;
  object-fit: cover;
}

/* Stats */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
  margin-bottom: 64px;
}
@media (min-width: 768px) {
  .stats-grid {
    grid-template-columns: repeat(4, 1fr);
    gap: 0;
  }
}
.stat-item {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  border-left: 1px solid var(--line);
  padding-left: 24px;
}
@media (max-width: 767px) {
  .stat-item {
    border-left: none;
    border-top: 1px solid var(--line);
    padding-left: 0;
    padding-top: 20px;
  }
}
.stat-item strong {
  font-size: 36px;
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--ink);
  font-variant-numeric: tabular-nums;
}
@media (min-width: 768px) {
  .stat-item strong {
    font-size: 48px;
  }
}
.stat-item span {
  font-size: 14px;
  color: var(--muted);
  margin-top: 4px;
}
.testimonial {
  max-width: 760px;
  margin: 0 auto;
  text-align: center;
  padding: 48px 0 0;
  border-top: 1px solid var(--line);
}
.testimonial p {
  font-size: 20px;
  line-height: 1.7;
  color: var(--ink);
  font-weight: 400;
  letter-spacing: -0.01em;
}
@media (min-width: 768px) {
  .testimonial p {
    font-size: 24px;
  }
}
.testimonial span {
  display: block;
  margin-top: 20px;
  font-size: 14px;
  color: var(--muted);
}

/* Pricing */
.pricing-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 24px;
  margin-bottom: 40px;
}
@media (min-width: 1024px) {
  .pricing-grid {
    grid-template-columns: 1fr 1fr;
    gap: 32px;
  }
}
.pricing-card {
  position: relative;
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: 4px;
  padding: 40px;
  display: flex;
  flex-direction: column;
}
.pricing-recommended {
  border: 1px solid var(--brand-700);
}
.pricing-recommended::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: var(--brand-700);
}
.rec-badge {
  position: absolute;
  top: 16px;
  right: 16px;
  background: var(--brand-700);
  color: var(--white);
  font-size: 12px;
  padding: 4px 12px;
  border-radius: 999px;
}
.pricing-card h3 {
  font-size: 22px;
  font-weight: 600;
  margin-bottom: 4px;
}
.pricing-desc {
  color: var(--muted);
  font-size: 14px;
  margin-bottom: 24px;
}
.pricing-card ul {
  list-style: none;
  padding: 0;
  margin: 0 0 32px;
  display: flex;
  flex-direction: column;
  gap: 12px;
}
.pricing-card ul li {
  position: relative;
  padding-left: 28px;
  font-size: 15px;
  color: var(--ink);
}
.pricing-card ul li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 7px;
  width: 16px;
  height: 16px;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 20 20' fill='%232C6B58'%3E%3Cpath fill-rule='evenodd' d='M16.7 5.3a1 1 0 010 1.4l-7.5 7.5a1 1 0 01-1.4 0l-3.5-3.5a1 1 0 111.4-1.4l2.8 2.8 6.8-6.8a1 1 0 011.4 0z' clip-rule='evenodd'/%3E%3C/svg%3E");
  background-size: contain;
  background-repeat: no-repeat;
}
.pricing-note {
  font-size: 13px;
  color: var(--muted);
  margin-top: auto;
  padding-top: 16px;
  border-top: 1px solid var(--line);
  margin-bottom: 16px;
}
.pricing-custom {
  border: 1px dashed var(--line);
  border-radius: 4px;
  padding: 32px;
  display: flex;
  flex-direction: column;
  gap: 20px;
  align-items: flex-start;
  background: var(--white);
}
@media (min-width: 768px) {
  .pricing-custom {
    flex-direction: row;
    align-items: center;
    justify-content: space-between;
  }
}
.pricing-custom strong {
  font-size: 18px;
  font-weight: 600;
  display: block;
  margin-bottom: 4px;
}
.pricing-custom p {
  color: var(--muted);
  font-size: 14px;
}

/* FAQ */
.faq-wrap {
  display: grid;
  grid-template-columns: 1fr;
  gap: 48px;
}
@media (min-width: 1024px) {
  .faq-wrap {
    grid-template-columns: 2fr 3fr;
    gap: 72px;
  }
}
.faq-list {
  border-top: 1px solid var(--line);
}
.faq-item {
  border-bottom: 1px solid var(--line);
}
.faq-q {
  width: 100%;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  padding: 20px 0;
  background: none;
  border: none;
  font-size: 16px;
  font-weight: 500;
  color: var(--ink);
  text-align: left;
  transition: color 0.2s;
}
.faq-q:hover {
  color: var(--brand-700);
}
.faq-q:focus-visible {
  outline: 2px solid var(--brand-600);
  outline-offset: 2px;
}
.faq-q-icon {
  position: relative;
  flex-shrink: 0;
  width: 16px;
  height: 16px;
}
.faq-q-icon::before,
.faq-q-icon::after {
  content: '';
  position: absolute;
  background: var(--brand-700);
  border-radius: 1px;
  transition: transform 0.3s ease;
}
.faq-q-icon::before {
  top: 7px;
  left: 0;
  width: 16px;
  height: 2px;
}
.faq-q-icon::after {
  top: 0;
  left: 7px;
  width: 2px;
  height: 16px;
}
.faq-item.active .faq-q-icon::after {
  transform: scaleY(0);
}
.faq-a {
  display: none;
  padding: 0 0 24px;
  color: var(--muted);
  line-height: 1.8;
  font-size: 15px;
  max-width: 640px;
}
.faq-item.active .faq-a {
  display: block;
}

/* News */
.news-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 32px;
}
@media (min-width: 1024px) {
  .news-grid {
    grid-template-columns: 2fr 3fr;
    gap: 48px;
  }
}
.news-featured {
  display: block;
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: 4px;
  overflow: hidden;
  transition: box-shadow 0.3s, transform 0.3s;
  text-decoration: none;
}
.news-featured:hover {
  box-shadow: 0 12px 32px rgba(13,26,22,0.08);
  transform: translateY(-2px);
}
.news-featured img {
  width: 100%;
  aspect-ratio: 16 / 10;
  object-fit: cover;
}
.news-featured-body {
  padding: 24px;
}
.news-meta {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-bottom: 12px;
  font-size: 13px;
}
.news-cat {
  color: var(--brand-700);
  background: var(--brand-50);
  padding: 2px 10px;
  border-radius: 999px;
  font-weight: 500;
}
.news-date {
  color: var(--muted);
}
.news-featured h3 {
  font-size: 20px;
  font-weight: 600;
  line-height: 1.4;
  margin-bottom: 10px;
  color: var(--ink);
}
.news-featured p {
  color: var(--muted);
  font-size: 14px;
  line-height: 1.7;
  margin-bottom: 16px;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.news-more {
  font-size: 14px;
  color: var(--brand-700);
  font-weight: 500;
  transition: transform 0.2s;
  display: inline-block;
}
.news-featured:hover .news-more {
  transform: translateX(4px);
}
.news-rows {
  display: flex;
  flex-direction: column;
  gap: 16px;
}
.news-row {
  display: block;
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: 4px;
  padding: 20px 24px;
  transition: box-shadow 0.3s, transform 0.3s;
  text-decoration: none;
}
.news-row:hover {
  box-shadow: 0 8px 24px rgba(13,26,22,0.06);
  transform: translateY(-1px);
}
.news-row .news-meta {
  margin-bottom: 8px;
}
.news-row h3 {
  font-size: 16px;
  font-weight: 600;
  line-height: 1.4;
  color: var(--ink);
  margin-bottom: 6px;
}
.news-row p {
  color: var(--muted);
  font-size: 14px;
  line-height: 1.6;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.empty-state {
  border: 1px dashed var(--line);
  border-radius: 4px;
  padding: 48px 24px;
  text-align: center;
  color: var(--muted);
  background: var(--white);
  font-size: 15px;
}

/* CTA section */
.cta-section {
  background: var(--brand-950);
  position: relative;
  padding: 80px 0;
  overflow: hidden;
}
@media (min-width: 768px) {
  .cta-section {
    padding: 120px 0;
  }
}
.cta-section::before {
  content: '';
  position: absolute;
  top: -60px;
  right: -60px;
  width: 240px;
  height: 240px;
  background-image: radial-gradient(rgba(255,255,255,0.1) 1px, transparent 1px);
  background-size: 16px 16px;
  border-radius: 50%;
  pointer-events: none;
}
.cta-section::after {
  content: '';
  position: absolute;
  bottom: -80px;
  left: -40px;
  width: 320px;
  height: 320px;
  background-image: radial-gradient(rgba(255,255,255,0.06) 1px, transparent 1px);
  background-size: 20px 20px;
  border-radius: 50%;
  pointer-events: none;
}
.cta-inner {
  position: relative;
  z-index: 1;
  text-align: center;
  max-width: 720px;
}
.cta-inner h2 {
  font-size: 36px;
  font-weight: 600;
  letter-spacing: -0.02em;
  color: var(--white);
  line-height: 1.25;
  margin-bottom: 16px;
}
@media (min-width: 768px) {
  .cta-inner h2 {
    font-size: 48px;
  }
}
.cta-inner p {
  color: rgba(255,255,255,0.6);
  font-size: 16px;
  line-height: 1.75;
  margin-bottom: 36px;
}
.cta-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  justify-content: center;
}

/* Footer */
.site-footer {
  background: var(--brand-950);
  color: rgba(255,255,255,0.6);
  padding: 64px 0 0;
}
.footer-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 40px;
  padding-bottom: 48px;
}
@media (min-width: 768px) {
  .footer-grid {
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: 48px;
  }
}
.footer-brand .logo-main {
  color: var(--white);
  font-size: 24px;
}
.footer-brand .logo-sub {
  color: rgba(255,255,255,0.5);
}
.footer-brand p {
  font-size: 14px;
  line-height: 1.75;
  margin-top: 16px;
  max-width: 280px;
}
.footer-col h4 {
  color: var(--white);
  font-size: 14px;
  font-weight: 600;
  letter-spacing: 0.05em;
  margin-bottom: 16px;
}
.footer-col a,
.footer-col span {
  display: block;
  font-size: 14px;
  color: rgba(255,255,255,0.6);
  margin-bottom: 10px;
  transition: color 0.2s;
}
.footer-col a:hover {
  color: var(--white);
}
.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.1);
  padding: 20px 0;
  display: flex;
  flex-direction: column;
  gap: 4px;
  justify-content: space-between;
  font-size: 13px;
  color: rgba(255,255,255,0.4);
}
@media (min-width: 768px) {
  .footer-bottom {
    flex-direction: row;
    align-items: center;
  }
}

/* Float CTA */
.float-cta {
  position: fixed;
  right: 24px;
  bottom: 24px;
  z-index: 40;
  background: var(--brand-900);
  color: var(--white);
  padding: 12px 24px;
  border-radius: 4px;
  font-size: 14px;
  font-weight: 500;
  box-shadow: 0 8px 24px rgba(13,26,22,0.24);
  transition: all 0.3s ease;
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  gap: 8px;
}
.float-cta:hover {
  background: var(--brand-700);
  transform: translateY(-2px);
  box-shadow: 0 12px 32px rgba(13,26,22,0.28);
}
.float-cta:focus-visible {
  outline: 2px solid var(--gold-500);
  outline-offset: 2px;
}
@media (max-width: 767px) {
  .float-cta {
    left: 16px;
    right: 16px;
    bottom: 16px;
    text-align: center;
    justify-content: center;
  }
}

/* Fade up animation */
.fade-up {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}
.fade-up.fade-in {
  opacity: 1;
  transform: translateY(0);
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation: none !important;
    transition: none !important;
  }
  html {
    scroll-behavior: auto;
  }
  .fade-up {
    opacity: 1;
    transform: none;
  }
}

/* roulang page: category1 */
:root {
      --brand-950: #0D1A16;
      --brand-900: #13261F;
      --brand-800: #1B3A30;
      --brand-700: #245343;
      --brand-600: #2C6B58;
      --brand-500: #3D8972;
      --brand-50: #EAF2EE;
      --gold-600: #A97C3A;
      --gold-500: #C6A15B;
      --gold-400: #D9BE80;
      --ink: #17241F;
      --muted: #5B6B64;
      --line: #DCE4DF;
      --paper: #F6F4EF;
      --white: #FFFFFF;
      --radius: 4px;
      --radius-lg: 6px;
      --shadow: rgba(13, 26, 22, 0.08);
      --container: 80rem;
    }

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

    html {
      scroll-behavior: smooth;
    }

    body {
      margin: 0;
      font-family: 'PingFang SC', 'HarmonyOS Sans SC', 'Microsoft YaHei', 'Noto Sans SC', 'Helvetica Neue', Arial, sans-serif;
      font-size: 15px;
      line-height: 1.75;
      color: #17241F;
      background: #F6F4EF;
      -webkit-font-smoothing: antialiased;
      text-rendering: optimizeLegibility;
      font-feature-settings: "tnum";
    }

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

    a {
      color: inherit;
      text-decoration: none;
      transition: color .2s ease;
    }

    a:hover {
      color: var(--brand-700);
    }

    button {
      font-family: inherit;
      cursor: pointer;
    }

    .container {
      max-width: 80rem;
      margin-left: auto;
      margin-right: auto;
      padding-left: 1.5rem;
      padding-right: 1.5rem;
    }

    @media (min-width: 1024px) {
      .container {
        padding-left: 2rem;
        padding-right: 2rem;
      }
    }

    .site-header {
      position: sticky;
      top: 0;
      z-index: 50;
      height: 4rem;
      background: rgba(246, 244, 239, 0.85);
      backdrop-filter: blur(10px);
      -webkit-backdrop-filter: blur(10px);
      border-bottom: 1px solid var(--line);
    }

    @media (min-width: 768px) {
      .site-header {
        height: 5rem;
      }
    }

    .header-inner {
      display: flex;
      align-items: center;
      justify-content: space-between;
      height: 100%;
      gap: 1rem;
    }

    .logo {
      display: flex;
      align-items: baseline;
      gap: 0.4rem;
      line-height: 1;
      flex-shrink: 0;
    }

    .logo-main {
      font-size: 1.35rem;
      font-weight: 700;
      color: var(--brand-900);
      letter-spacing: -0.02em;
    }

    .logo-sub {
      font-size: 0.8rem;
      font-weight: 500;
      color: var(--muted);
      letter-spacing: 0.06em;
    }

    .main-nav {
      display: none;
      align-items: center;
      gap: 2rem;
    }

    .main-nav .nav-link {
      position: relative;
      display: inline-flex;
      align-items: center;
      gap: 0.35rem;
      font-size: 0.875rem;
      letter-spacing: 0.02em;
      color: rgba(23, 36, 31, 0.6);
      padding: 0.5rem 0.125rem;
      white-space: nowrap;
      transition: color .2s ease;
    }

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

    .main-nav .nav-link.active {
      color: var(--brand-700);
      font-weight: 600;
    }

    .main-nav .nav-link.active::after {
      content: "";
      position: absolute;
      left: 0;
      bottom: 0;
      width: 100%;
      height: 2px;
      background: var(--brand-700);
      border-radius: 1px;
    }

    .main-nav .nav-link.active::before {
      content: "";
      display: inline-block;
      width: 4px;
      height: 4px;
      border-radius: 9999px;
      background: var(--brand-700);
    }

    .header-actions {
      display: flex;
      align-items: center;
      gap: 0.75rem;
      margin-left: auto;
    }

    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 0.5rem;
      font-size: 0.875rem;
      font-weight: 500;
      line-height: 1;
      border-radius: 4px;
      padding: 0.75rem 1.5rem;
      transition: background .2s ease, border-color .2s ease, color .2s ease, transform .2s ease, box-shadow .2s ease;
      border: 1px solid transparent;
      white-space: nowrap;
    }

    .btn:focus-visible {
      outline: 2px solid var(--brand-500);
      outline-offset: 2px;
    }

    .btn-primary {
      background: var(--brand-900);
      color: #fff;
    }

    .btn-primary:hover {
      background: var(--brand-700);
      color: #fff;
      transform: translateY(-1px);
      box-shadow: 0 8px 20px rgba(13, 26, 22, 0.12);
    }

    .btn-primary:active {
      transform: translateY(0);
      box-shadow: none;
    }

    .btn-outline {
      background: transparent;
      border-color: var(--line);
      color: var(--ink);
    }

    .btn-outline:hover {
      border-color: var(--ink);
      color: var(--ink);
      transform: translateY(-1px);
    }

    .btn-gold {
      background: var(--gold-500);
      color: var(--brand-950);
    }

    .btn-gold:hover {
      background: var(--gold-400);
      color: var(--brand-950);
      transform: translateY(-1px);
      box-shadow: 0 8px 24px rgba(198, 161, 91, 0.3);
    }

    .btn-sm {
      padding: 0.55rem 1.1rem;
      font-size: 0.8125rem;
    }

    .hamburger {
      display: inline-flex;
      flex-direction: column;
      justify-content: center;
      gap: 5px;
      width: 40px;
      height: 40px;
      background: transparent;
      border: none;
      border-radius: 4px;
      padding: 8px;
    }

    .hamburger span {
      display: block;
      height: 1.5px;
      width: 100%;
      background: var(--ink);
      border-radius: 1px;
      transition: transform .25s ease, opacity .2s ease;
    }

    .hamburger.open span:first-child {
      transform: translateY(3.5px) rotate(45deg);
    }

    .hamburger.open span:last-child {
      transform: translateY(-3.5px) rotate(-45deg);
    }

    .mobile-menu {
      display: none;
      position: fixed;
      top: 4rem;
      left: 0;
      right: 0;
      z-index: 49;
      background: var(--paper);
      border-bottom: 1px solid var(--line);
      padding: 1rem 1.5rem 1.5rem;
    }

    .mobile-menu.open {
      display: block;
    }

    .mobile-menu a {
      display: block;
      padding: 0.9rem 0.25rem;
      border-bottom: 1px solid var(--line);
      font-size: 0.9375rem;
      color: var(--ink);
    }

    .mobile-menu a.active {
      color: var(--brand-700);
      font-weight: 600;
    }

    .section {
      padding: 4rem 0;
    }

    @media (min-width: 768px) {
      .section {
        padding: 5rem 0;
      }
    }

    @media (min-width: 1024px) {
      .section {
        padding: 7rem 0;
      }
    }

    .section-head {
      max-width: 38rem;
      margin-bottom: 2.5rem;
    }

    .section-tag {
      display: inline-flex;
      align-items: center;
      gap: 0.5rem;
      font-size: 0.75rem;
      letter-spacing: 0.22em;
      color: var(--brand-700);
      text-transform: uppercase;
      font-weight: 600;
      margin-bottom: 0.75rem;
    }

    .section-title {
      font-size: 1.875rem;
      font-weight: 600;
      letter-spacing: -0.02em;
      line-height: 1.25;
      color: var(--ink);
      margin: 0 0 0.75rem;
    }

    @media (min-width: 768px) {
      .section-title {
        font-size: 2.5rem;
      }
    }

    .section-desc {
      font-size: 0.9375rem;
      color: var(--muted);
      line-height: 1.85;
      max-width: 34rem;
    }

    .hero-breadcrumb {
      font-size: 0.8125rem;
      color: var(--muted);
      display: flex;
      align-items: center;
      gap: 0.4rem;
      flex-wrap: wrap;
      margin-bottom: 1rem;
    }

    .hero-breadcrumb a {
      color: var(--muted);
    }

    .hero-breadcrumb a:hover {
      color: var(--brand-700);
    }

    .hero-breadcrumb .sep {
      color: var(--line);
    }

    .hero-breadcrumb .current {
      color: var(--brand-700);
      font-weight: 600;
    }

    .status-bar {
      display: inline-flex;
      align-items: center;
      gap: 0.5rem;
      font-size: 0.8125rem;
      color: var(--brand-800);
      background: var(--brand-50);
      border: 1px solid var(--line);
      border-radius: 999px;
      padding: 0.375rem 0.875rem;
    }

    .status-dot {
      width: 6px;
      height: 6px;
      border-radius: 9999px;
      background: var(--brand-500);
      animation: pulse-dot 1.8s infinite;
    }

    @keyframes pulse-dot {
      0% { box-shadow: 0 0 0 0 rgba(61, 137, 114, 0.5); }
      70% { box-shadow: 0 0 0 6px rgba(61, 137, 114, 0); }
      100% { box-shadow: 0 0 0 0 rgba(61, 137, 114, 0); }
    }

    .feature-row {
      display: grid;
      grid-template-columns: 1fr;
      gap: 2.5rem;
      align-items: center;
    }

    @media (min-width: 1024px) {
      .feature-row {
        grid-template-columns: 1fr 1fr;
        gap: 4rem;
      }
    }

    .feature-media {
      border-radius: 6px;
      overflow: hidden;
      border: 1px solid var(--line);
      background: #fff;
    }

    .feature-media img {
      width: 100%;
      aspect-ratio: 4 / 3;
      object-fit: cover;
    }

    .feature-body .feature-title {
      font-size: 1.5rem;
      font-weight: 600;
      letter-spacing: -0.01em;
      color: var(--ink);
      margin: 0 0 1rem;
    }

    .feature-body .feature-desc {
      font-size: 0.9375rem;
      line-height: 1.9;
      color: var(--muted);
    }

    .support-list {
      border-top: 1px solid var(--line);
    }

    .support-item {
      display: flex;
      align-items: flex-start;
      justify-content: space-between;
      gap: 2rem;
      padding: 1.75rem 0.25rem;
      border-bottom: 1px solid var(--line);
      transition: background .2s ease;
    }

    .support-item:hover {
      background: var(--brand-50);
    }

    .support-item h3 {
      font-size: 1.0625rem;
      font-weight: 600;
      color: var(--ink);
      margin: 0 0 0.4rem;
    }

    .support-item p {
      font-size: 0.875rem;
      color: var(--muted);
      margin: 0;
      max-width: 36rem;
    }

    .support-arrow {
      flex-shrink: 0;
      display: inline-flex;
      align-items: center;
      gap: 0.4rem;
      font-size: 0.8125rem;
      font-weight: 500;
      color: var(--brand-700);
      white-space: nowrap;
      padding: 0.5rem 0.25rem;
      transition: transform .2s ease;
    }

    .support-arrow:hover {
      transform: translateX(4px);
    }

    .faq-list {
      border-top: 1px solid var(--line);
      border-bottom: 1px solid var(--line);
    }

    .faq-item {
      border-bottom: 1px solid var(--line);
    }

    .faq-item:last-child {
      border-bottom: none;
    }

    .faq-q {
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 1rem;
      width: 100%;
      padding: 1.5rem 0.25rem;
      background: transparent;
      border: none;
      text-align: left;
      font-size: 0.9375rem;
      font-weight: 500;
      color: var(--ink);
      transition: color .2s ease;
      min-height: 44px;
    }

    .faq-q:hover {
      color: var(--brand-700);
    }

    .faq-q .icon {
      position: relative;
      width: 18px;
      height: 18px;
      flex-shrink: 0;
    }

    .faq-q .icon::before,
    .faq-q .icon::after {
      content: "";
      position: absolute;
      background: var(--brand-700);
      border-radius: 1px;
      transition: transform .25s ease;
    }

    .faq-q .icon::before {
      top: 50%;
      left: 0;
      width: 100%;
      height: 2px;
      transform: translateY(-50%);
    }

    .faq-q .icon::after {
      left: 50%;
      top: 0;
      width: 2px;
      height: 100%;
      transform: translateX(-50%);
    }

    .faq-item.open .faq-q .icon::after {
      transform: translateX(-50%) rotate(90deg);
      opacity: 0;
    }

    .faq-a {
      max-height: 0;
      overflow: hidden;
      transition: max-height .3s ease;
    }

    .faq-a-inner {
      padding: 0 1.75rem 1.5rem 0;
      font-size: 0.875rem;
      color: var(--muted);
      line-height: 1.85;
    }

    .cta-section {
      background: var(--brand-950);
      color: #fff;
      position: relative;
      overflow: hidden;
    }

    .cta-section::before {
      content: "";
      position: absolute;
      top: -60%;
      right: -10%;
      width: 60%;
      height: 200%;
      background: radial-gradient(circle, rgba(61, 137, 114, 0.18) 0%, transparent 60%);
      pointer-events: none;
    }

    .cta-section::after {
      content: "";
      position: absolute;
      left: 0;
      right: 0;
      bottom: 0;
      height: 4px;
      background: linear-gradient(90deg, var(--gold-500), transparent);
      opacity: 0.4;
    }

    .site-footer {
      background: var(--brand-950);
      color: rgba(255, 255, 255, 0.65);
      padding: 4rem 0 0;
      font-size: 0.875rem;
    }

    .footer-grid {
      display: grid;
      grid-template-columns: 1fr;
      gap: 2.5rem;
      margin-bottom: 3rem;
    }

    @media (min-width: 768px) {
      .footer-grid {
        grid-template-columns: 2fr 1fr 1fr 1fr;
        gap: 2rem;
      }
    }

    .footer-brand p {
      margin: 1rem 0 0;
      max-width: 18rem;
      line-height: 1.8;
      color: rgba(255, 255, 255, 0.5);
    }

    .site-footer h4 {
      color: #fff;
      font-size: 0.875rem;
      font-weight: 600;
      margin: 0 0 1rem;
      letter-spacing: 0.04em;
    }

    .footer-col {
      display: flex;
      flex-direction: column;
      gap: 0.7rem;
    }

    .footer-col a {
      color: rgba(255, 255, 255, 0.6);
      transition: color .2s ease;
    }

    .footer-col a:hover {
      color: #fff;
    }

    .footer-col span {
      color: rgba(255, 255, 255, 0.45);
      line-height: 1.7;
    }

    .footer-bottom {
      border-top: 1px solid rgba(255, 255, 255, 0.1);
      padding: 1.5rem 0;
      display: flex;
      flex-direction: column;
      gap: 0.25rem;
      align-items: flex-start;
    }

    @media (min-width: 768px) {
      .footer-bottom {
        flex-direction: row;
        justify-content: space-between;
      }
    }

    .footer-bottom span {
      color: rgba(255, 255, 255, 0.35);
      font-size: 0.8125rem;
    }

    .float-cta {
      position: fixed;
      right: 1.5rem;
      bottom: 1.5rem;
      z-index: 40;
    }

    @media (max-width: 640px) {
      .float-cta {
        right: 1rem;
        bottom: 1rem;
      }
    }

    .fade-up {
      opacity: 0;
      transform: translateY(24px);
      transition: opacity 0.6s ease, transform 0.6s ease;
    }

    .fade-up.visible {
      opacity: 1;
      transform: translateY(0);
    }

    @media (prefers-reduced-motion: reduce) {
      html {
        scroll-behavior: auto;
      }
      .fade-up {
        opacity: 1;
        transform: none;
        transition: none;
      }
      .status-dot {
        animation: none;
      }
    }

/* roulang page: category2 */
:root {
            --brand-950: #0D1A16;
            --brand-900: #13261F;
            --brand-800: #1B3A30;
            --brand-700: #245343;
            --brand-600: #2C6B58;
            --brand-500: #3D8972;
            --brand-50: #EAF2EE;
            --gold-600: #A97C3A;
            --gold-500: #C6A15B;
            --gold-400: #D9BE80;
            --ink: #17241F;
            --muted: #5B6B64;
            --line: #DCE4DF;
            --paper: #F6F4EF;
            --white: #FFFFFF;
        }

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

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: 'PingFang SC', 'HarmonyOS Sans SC', 'Microsoft YaHei', 'Noto Sans SC', 'Helvetica Neue', Arial, sans-serif;
            font-size: 16px;
            line-height: 1.8;
            color: var(--ink);
            background: var(--paper);
            -webkit-font-smoothing: antialiased;
            text-rendering: optimizeLegibility;
        }

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

        a {
            color: inherit;
            text-decoration: none;
            transition: color .3s ease;
        }

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

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

        @media (min-width: 1024px) {
            .container {
                padding-left: 32px;
                padding-right: 32px;
            }
        }

        .font-mono-num {
            font-variant-numeric: tabular-nums;
            font-feature-settings: 'tnum';
        }

        .btn-primary {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            background-color: var(--brand-900);
            color: #fff;
            font-size: 14px;
            font-weight: 500;
            letter-spacing: .05em;
            padding: 12px 28px;
            border-radius: 4px;
            transition: all .3s ease;
            min-height: 44px;
            border: 1px solid var(--brand-900);
        }

        .btn-primary:hover {
            background-color: var(--brand-700);
            border-color: var(--brand-700);
            transform: translateY(-1px);
            box-shadow: 0 8px 24px rgba(13, 26, 22, .08);
        }

        .btn-primary:focus-visible,
        .btn-outline:focus-visible {
            outline: 2px solid var(--brand-600);
            outline-offset: 3px;
        }

        .btn-primary:active {
            transform: translateY(0);
            box-shadow: none;
        }

        .btn-outline {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            background: transparent;
            border: 1px solid var(--line);
            color: var(--ink);
            font-size: 14px;
            font-weight: 500;
            padding: 12px 28px;
            border-radius: 4px;
            transition: all .3s ease;
            min-height: 44px;
        }

        .btn-outline:hover {
            border-color: var(--ink);
            background: rgba(255, 255, 255, .6);
        }

        .btn-gold {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            background-color: var(--gold-500);
            color: var(--brand-950);
            font-size: 14px;
            font-weight: 600;
            letter-spacing: .04em;
            padding: 12px 28px;
            border-radius: 4px;
            transition: all .3s ease;
            min-height: 44px;
            border: 1px solid var(--gold-500);
        }

        .btn-gold:hover {
            background-color: var(--gold-400);
            border-color: var(--gold-400);
            box-shadow: 0 8px 24px rgba(166, 124, 58, .18);
        }

        .btn-gold:focus-visible {
            outline: 2px solid var(--gold-400);
            outline-offset: 3px;
        }

        .section-tag {
            display: inline-flex;
            align-items: center;
            font-size: 12px;
            letter-spacing: .25em;
            color: var(--brand-700);
            text-transform: uppercase;
            font-weight: 500;
        }

        .section-tag::before {
            content: '';
            display: inline-block;
            width: 24px;
            height: 1px;
            background: var(--gold-500);
            margin-right: 12px;
        }

        /* Header */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 100;
            background: rgba(246, 244, 239, .85);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border-bottom: 1px solid var(--line);
        }

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

        .logo {
            display: flex;
            align-items: baseline;
            gap: 6px;
            flex-shrink: 0;
        }

        .logo-main {
            font-size: 24px;
            font-weight: 700;
            letter-spacing: .02em;
            color: var(--brand-900);
        }

        .logo-sub {
            font-size: 13px;
            color: var(--brand-600);
            letter-spacing: .12em;
            font-weight: 400;
        }

        .main-nav {
            display: flex;
            align-items: center;
            gap: 32px;
        }

        .nav-link {
            position: relative;
            font-size: 14px;
            letter-spacing: .06em;
            color: rgba(23, 36, 31, .6);
            padding: 8px 0;
            transition: color .3s ease;
        }

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

        .nav-link.active {
            color: var(--brand-700);
            font-weight: 500;
        }

        .nav-link.active::after {
            content: '';
            position: absolute;
            left: 0;
            bottom: 0;
            width: 100%;
            height: 2px;
            background: var(--brand-700);
            border-radius: 2px;
        }

        .header-cta {
            display: flex;
            align-items: center;
            gap: 16px;
            flex-shrink: 0;
        }

        .header-cta .btn-primary {
            padding: 9px 20px;
            font-size: 13px;
            min-height: 40px;
        }

        .menu-toggle {
            display: none;
            flex-direction: column;
            gap: 6px;
            padding: 8px;
            width: 44px;
            height: 44px;
            align-items: center;
            justify-content: center;
        }

        .menu-toggle span {
            display: block;
            width: 22px;
            height: 2px;
            background: var(--ink);
            transition: all .3s ease;
        }

        .menu-toggle.open span:nth-child(1) {
            transform: translateY(4px) rotate(45deg);
        }

        .menu-toggle.open span:nth-child(2) {
            opacity: 0;
        }

        .menu-toggle.open span:nth-child(3) {
            transform: translateY(-4px) rotate(-45deg);
        }

        .mobile-nav {
            display: none;
            position: fixed;
            top: 64px;
            left: 0;
            right: 0;
            background: var(--paper);
            z-index: 99;
            border-bottom: 1px solid var(--line);
            padding: 24px 24px 32px;
            box-shadow: 0 20px 30px rgba(13, 26, 22, .06);
        }

        .mobile-nav.open {
            display: block;
        }

        .mobile-nav .nav-link {
            display: block;
            padding: 14px 0;
            font-size: 16px;
            border-bottom: 1px solid var(--line);
        }

        .mobile-nav .nav-link.active {
            color: var(--brand-700);
        }

        .mobile-nav .nav-link.active::after {
            display: none;
        }

        .mobile-nav-cta {
            margin-top: 24px;
        }

        .mobile-nav-cta .btn-primary {
            width: 100%;
        }

        @media (max-width: 1023px) {
            .main-nav {
                display: none;
            }
            .header-cta .btn-primary {
                display: none;
            }
            .menu-toggle {
                display: flex;
            }
            .header-cta {
                gap: 0;
            }
        }

        @media (max-width: 520px) {
            .header-inner {
                height: 60px;
            }
            .mobile-nav {
                top: 60px;
            }
            .logo-main {
                font-size: 20px;
            }
            .logo-sub {
                font-size: 12px;
            }
        }

        /* Footer */
        .site-footer {
            background: var(--brand-950);
            color: rgba(255, 255, 255, .7);
            padding-top: 72px;
            padding-bottom: 32px;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1.2fr;
            gap: 48px;
            padding-bottom: 56px;
            border-bottom: 1px solid rgba(255, 255, 255, .1);
        }

        .footer-brand p {
            margin-top: 20px;
            font-size: 14px;
            line-height: 1.9;
            color: rgba(255, 255, 255, .6);
            max-width: 260px;
        }

        .footer-brand .logo-main {
            color: #fff;
        }

        .footer-brand .logo-sub {
            color: var(--gold-400);
        }

        .footer-col h4 {
            color: #fff;
            font-size: 15px;
            font-weight: 600;
            margin-bottom: 20px;
            letter-spacing: .04em;
        }

        .footer-col a,
        .footer-col span {
            display: block;
            font-size: 14px;
            color: rgba(255, 255, 255, .6);
            margin-bottom: 12px;
            transition: color .3s ease;
            line-height: 1.6;
        }

        .footer-col a:hover {
            color: #fff;
        }

        .footer-bottom {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding-top: 24px;
            font-size: 13px;
            color: rgba(255, 255, 255, .4);
        }

        @media (max-width: 768px) {
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 32px;
            }
            .footer-brand {
                grid-column: 1 / -1;
            }
        }

        @media (max-width: 520px) {
            .footer-grid {
                grid-template-columns: 1fr;
            }
            .footer-bottom {
                flex-direction: column;
                gap: 8px;
                align-items: flex-start;
            }
        }

        /* Floating CTA */
        .floating-cta {
            position: fixed;
            right: 24px;
            bottom: 24px;
            z-index: 90;
        }

        .floating-cta .btn-primary {
            box-shadow: 0 8px 24px rgba(13, 26, 22, .15);
        }

        @media (max-width: 520px) {
            .floating-cta {
                right: 0;
                bottom: 0;
                left: 0;
                width: 100%;
                padding: 12px 16px;
                background: rgba(246, 244, 239, .95);
                backdrop-filter: blur(8px);
                border-top: 1px solid var(--line);
            }
            .floating-cta .btn-primary {
                width: 100%;
            }
        }

        /* fade-up */
        .fade-up {
            opacity: 0;
            transform: translateY(24px);
            transition: opacity .6s ease, transform .6s ease;
        }

        .fade-up.visible {
            opacity: 1;
            transform: translateY(0);
        }

        @media (prefers-reduced-motion: reduce) {
            * {
                animation: none !important;
                transition: none !important;
            }
            html {
                scroll-behavior: auto;
            }
            .fade-up {
                opacity: 1;
                transform: none;
            }
        }

        /* Page Hero */
        .page-hero {
            position: relative;
            background: var(--paper);
            padding: 80px 0 64px;
            border-bottom: 1px solid var(--line);
            overflow: hidden;
        }

        .page-hero::before {
            content: '';
            position: absolute;
            top: -80px;
            right: -40px;
            width: 360px;
            height: 360px;
            background: radial-gradient(circle, rgba(61, 137, 114, .08) 0%, transparent 60%);
            pointer-events: none;
        }

        .breadcrumb {
            display: flex;
            align-items: center;
            font-size: 13px;
            color: var(--muted);
            margin-bottom: 24px;
            gap: 8px;
        }

        .breadcrumb a {
            color: var(--muted);
            transition: color .3s ease;
        }

        .breadcrumb a:hover {
            color: var(--brand-700);
        }

        .breadcrumb span {
            color: var(--line);
        }

        .page-hero h1 {
            font-size: 44px;
            font-weight: 600;
            letter-spacing: -0.02em;
            line-height: 1.2;
            color: var(--brand-950);
            margin-top: 8px;
        }

        .page-hero .hero-desc {
            font-size: 16px;
            color: var(--muted);
            max-width: 640px;
            margin-top: 16px;
            line-height: 1.9;
        }

        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            font-size: 12px;
            letter-spacing: .2em;
            color: var(--brand-700);
            text-transform: uppercase;
            font-weight: 500;
        }

        .hero-badge .dot {
            width: 6px;
            height: 6px;
            border-radius: 50%;
            background: var(--gold-500);
        }

        @media (max-width: 768px) {
            .page-hero {
                padding: 56px 0 40px;
            }
            .page-hero h1 {
                font-size: 32px;
            }
            .page-hero .hero-desc {
                font-size: 15px;
            }
        }

        @media (max-width: 520px) {
            .page-hero h1 {
                font-size: 28px;
            }
        }

        /* Category2 specific styles */

        /* Param section */
        .param-section {
            padding: 80px 0;
            background: var(--white);
        }

        .param-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            border: 1px solid var(--line);
            border-radius: 6px;
            overflow: hidden;
        }

        .param-row {
            display: flex;
            padding: 20px 28px;
            border-bottom: 1px solid var(--line);
            border-right: 1px solid var(--line);
            align-items: baseline;
        }

        .param-row:nth-child(even) {
            border-right: none;
        }

        .param-row:nth-last-child(-n+2) {
            border-bottom: none;
        }

        .param-label {
            font-size: 14px;
            color: var(--muted);
            flex-shrink: 0;
            width: 100px;
        }

        .param-value {
            font-size: 16px;
            font-weight: 500;
            color: var(--brand-900);
        }

        @media (max-width: 768px) {
            .param-grid {
                grid-template-columns: 1fr;
            }
            .param-row {
                border-right: none;
                border-bottom: 1px solid var(--line);
            }
            .param-row:nth-last-child(-n+2) {
                border-bottom: 1px solid var(--line);
            }
            .param-row:last-child {
                border-bottom: none;
            }
        }

        @media (max-width: 520px) {
            .param-label {
                width: 80px;
                font-size: 13px;
            }
            .param-value {
                font-size: 14px;
            }
            .param-row {
                padding: 16px 20px;
                flex-direction: column;
                gap: 4px;
            }
        }

        /* Magazine columns */
        .magazine-section {
            padding: 88px 0;
            background: var(--paper);
        }

        .magazine-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 56px;
            margin-top: 48px;
        }

        .magazine-col .text-block {
            padding-left: 24px;
            border-left: 2px solid var(--gold-400);
        }

        .magazine-col h3 {
            font-size: 20px;
            font-weight: 600;
            color: var(--brand-900);
            margin-bottom: 16px;
            line-height: 1.5;
        }

        .magazine-col p {
            font-size: 15px;
            color: var(--muted);
            line-height: 2;
            margin-bottom: 16px;
        }

        @media (max-width: 768px) {
            .magazine-grid {
                grid-template-columns: 1fr;
                gap: 40px;
            }
        }

        /* Quote */
        .quote-section {
            padding: 80px 0;
            background: var(--brand-950);
            position: relative;
            overflow: hidden;
        }

        .quote-section::before {
            content: '';
            position: absolute;
            top: -100px;
            left: -60px;
            width: 300px;
            height: 300px;
            border: 1px solid rgba(255, 255, 255, .06);
            border-radius: 50%;
            pointer-events: none;
        }

        .quote-inner {
            max-width: 800px;
            margin: 0 auto;
            text-align: center;
        }

        .quote-text {
            font-size: 24px;
            line-height: 1.7;
            color: rgba(255, 255, 255, .9);
            font-weight: 400;
            letter-spacing: .01em;
        }

        .quote-author {
            margin-top: 32px;
            font-size: 14px;
            color: var(--gold-400);
            letter-spacing: .08em;
        }

        .quote-author .sep {
            margin: 0 8px;
            color: rgba(255, 255, 255, .3);
        }

        @media (max-width: 768px) {
            .quote-text {
                font-size: 18px;
            }
        }

        /* CTA section for category2 */
        .cat-cta-section {
            padding: 96px 0;
            background: var(--brand-950);
            position: relative;
            overflow: hidden;
        }

        .cat-cta-section::before {
            content: '';
            position: absolute;
            top: 0;
            right: 0;
            width: 360px;
            height: 100%;
            background: linear-gradient(135deg, transparent 0%, rgba(198, 161, 91, .08) 100%);
            pointer-events: none;
        }

        .cat-cta-inner {
            text-align: center;
            position: relative;
            z-index: 1;
        }

        .cat-cta-inner h2 {
            font-size: 40px;
            font-weight: 600;
            color: #fff;
            line-height: 1.3;
            letter-spacing: -0.01em;
        }

        .cat-cta-inner p {
            font-size: 16px;
            color: rgba(255, 255, 255, .6);
            max-width: 560px;
            margin: 20px auto 36px;
            line-height: 1.9;
        }

        .cat-cta-inner .btn-gold {
            font-size: 15px;
            padding: 14px 36px;
        }

        @media (max-width: 768px) {
            .cat-cta-section {
                padding: 64px 0;
            }
            .cat-cta-inner h2 {
                font-size: 28px;
            }
        }

        /* Support list */
        .support-section {
            padding: 72px 0;
            background: var(--white);
        }

        .support-list {
            border-top: 1px solid var(--line);
        }

        .support-item {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 20px 8px;
            border-bottom: 1px solid var(--line);
            transition: background .3s ease;
        }

        .support-item:hover {
            background: var(--brand-50);
        }

        .support-info h4 {
            font-size: 16px;
            font-weight: 600;
            color: var(--brand-900);
        }

        .support-info p {
            font-size: 14px;
            color: var(--muted);
            margin-top: 4px;
        }

        .support-link {
            display: inline-flex;
            align-items: center;
            font-size: 14px;
            color: var(--brand-700);
            font-weight: 500;
            white-space: nowrap;
        }

        .support-link .arrow {
            transition: transform .3s ease;
            margin-left: 4px;
        }

        .support-link:hover .arrow {
            transform: translateX(4px);
        }

        @media (max-width: 768px) {
            .support-item {
                flex-direction: column;
                align-items: flex-start;
                gap: 8px;
            }
        }

/* roulang page: article */
:root {
  --brand-950: #0D1A16;
  --brand-900: #13261F;
  --brand-800: #1B3A30;
  --brand-700: #245343;
  --brand-600: #2C6B58;
  --brand-500: #3D8972;
  --brand-50: #EAF2EE;
  --gold-600: #A97C3A;
  --gold-500: #C6A15B;
  --gold-400: #D9BE80;
  --ink: #17241F;
  --muted: #5B6B64;
  --line: #DCE4E5;
  --paper: #F6F4EF;
  --white: #FFFFFF;
}
* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}
html {
  scroll-behavior: smooth;
}
body {
  font-family: "PingFang SC", "HarmonyOS Sans SC", "Microsoft YaHei", "Noto Sans SC", "Helvetica Neue", Arial, sans-serif;
  background: var(--paper);
  color: var(--ink);
  font-size: 16px;
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
}
a {
  color: inherit;
  text-decoration: none;
}
img {
  max-width: 100%;
  height: auto;
  display: block;
}
button {
  font-family: inherit;
  border: none;
  background: none;
  cursor: pointer;
}
.container {
  width: 100%;
  max-width: 80rem;
  margin-left: auto;
  margin-right: auto;
  padding-left: 1.5rem;
  padding-right: 1.5rem;
}
@media (min-width: 1024px) {
  .container {
    padding-left: 2rem;
    padding-right: 2rem;
  }
}
.site-header {
  background: rgba(246,244,239,0.86);
  -webkit-backdrop-filter: blur(12px);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--line);
}
.logo-main {
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--brand-950);
  font-size: 1.35rem;
  line-height: 1.2;
}
.logo-sub {
  color: var(--brand-700);
  font-weight: 500;
  font-size: 0.85rem;
  letter-spacing: 0.02em;
  line-height: 1.2;
}
.nav-link {
  position: relative;
  font-size: 0.875rem;
  letter-spacing: 0.03em;
  color: rgba(23,36,31,0.62);
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  padding: 0.5rem 0.125rem;
  transition: color 0.25s ease;
}
.nav-link:hover {
  color: var(--ink);
}
.nav-link.active {
  color: var(--brand-700);
  font-weight: 500;
}
.nav-link.active::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 1px;
  background: var(--brand-700);
}
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  font-size: 0.875rem;
  font-weight: 500;
  line-height: 1;
  padding: 0.875rem 1.5rem;
  border-radius: 4px;
  min-height: 44px;
  border: 1px solid transparent;
  transition: all 0.25s ease;
  cursor: pointer;
  white-space: nowrap;
}
.btn:focus-visible {
  outline: 2px solid var(--brand-500);
  outline-offset: 3px;
}
.btn-primary {
  background: var(--brand-900);
  color: var(--white);
}
.btn-primary:hover {
  background: var(--brand-700);
}
.btn-primary:active {
  background: var(--brand-950);
  transform: translateY(1px);
}
.btn-outline {
  background: transparent;
  color: var(--ink);
  border-color: var(--line);
}
.btn-outline:hover {
  border-color: var(--ink);
}
.btn-outline-light {
  background: transparent;
  color: var(--white);
  border-color: rgba(255,255,255,0.32);
}
.btn-outline-light:hover {
  border-color: rgba(255,255,255,0.72);
  color: var(--white);
}
.btn-gold {
  background: var(--gold-500);
  color: var(--brand-950);
}
.btn-gold:hover {
  background: var(--gold-400);
}
.btn-gold:active {
  background: var(--gold-600);
}
.mobile-toggle {
  display: inline-flex;
  flex-direction: column;
  justify-content: center;
  gap: 6px;
  width: 44px;
  height: 44px;
  padding: 0 12px;
  background: transparent;
  border: none;
}
.mobile-toggle span {
  display: block;
  height: 1px;
  width: 20px;
  background: var(--ink);
  transition: transform 0.25s ease, opacity 0.25s ease;
}
.mobile-toggle[aria-expanded="true"] span:first-child {
  transform: translateY(3.5px) rotate(45deg);
}
.mobile-toggle[aria-expanded="true"] span:last-child {
  transform: translateY(-3.5px) rotate(-45deg);
}
.mobile-menu {
  position: fixed;
  top: 64px;
  left: 0;
  right: 0;
  z-index: 45;
  background: var(--paper);
  border-bottom: 1px solid var(--line);
  padding: 1.5rem;
  transform: translateY(-120%);
  opacity: 0;
  pointer-events: none;
  transition: transform 0.3s ease, opacity 0.3s ease;
}
.mobile-menu.open {
  transform: translateY(0);
  opacity: 1;
  pointer-events: auto;
}
.mobile-link {
  display: flex;
  align-items: center;
  min-height: 48px;
  padding: 0.5rem 0;
  border-bottom: 1px solid var(--line);
  font-size: 0.9375rem;
  color: var(--ink);
  transition: color 0.2s ease;
}
.mobile-link:hover {
  color: var(--brand-700);
}
.mobile-link.active {
  color: var(--brand-700);
  font-weight: 500;
}
.breadcrumb a {
  display: inline-block;
  min-height: 32px;
  line-height: 32px;
  transition: color 0.2s ease;
}
.breadcrumb a:hover {
  color: var(--brand-700);
}
.tag {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 0.25rem 1rem;
  font-size: 0.8125rem;
  border: 1px solid var(--line);
  border-radius: 4px;
  color: var(--muted);
  background: var(--white);
  transition: all 0.2s ease;
}
.tag:hover {
  border-color: var(--brand-700);
  color: var(--brand-700);
}
.article-content {
  max-width: 720px;
  margin-left: auto;
  margin-right: auto;
  font-size: 17px;
  line-height: 1.9;
  color: #1E2A26;
}
.article-content h2 {
  font-size: 1.65rem;
  line-height: 1.4;
  font-weight: 600;
  letter-spacing: -0.01em;
  margin-top: 3.5rem;
  margin-bottom: 1rem;
  color: var(--brand-950);
  padding-bottom: 0.5rem;
  border-bottom: 1px solid var(--line);
}
.article-content h3 {
  font-size: 1.3rem;
  line-height: 1.5;
  font-weight: 600;
  margin-top: 2.5rem;
  margin-bottom: 0.75rem;
  color: var(--brand-900);
}
.article-content p {
  margin: 1.5rem 0;
}
.article-content ul,
.article-content ol {
  margin: 1.5rem 0;
  padding-left: 1.5rem;
}
.article-content li {
  margin: 0.5rem 0;
}
.article-content blockquote {
  border-left: 2px solid var(--brand-700);
  background: var(--brand-50);
  padding: 1rem 1.5rem;
  margin: 2rem 0;
  color: var(--muted);
  border-radius: 0 4px 4px 0;
}
.article-content blockquote p {
  margin: 0.5rem 0;
}
.article-content img {
  border: 1px solid var(--line);
  border-radius: 4px;
  margin: 2rem auto;
}
.article-content table {
  width: 100%;
  border-collapse: collapse;
  margin: 2rem 0;
  font-size: 0.925rem;
}
.article-content th,
.article-content td {
  border: 1px solid var(--line);
  padding: 0.75rem 1rem;
  text-align: left;
}
.article-content th {
  background: var(--paper);
}
.article-content a {
  color: var(--brand-700);
  text-decoration: underline;
  text-underline-offset: 3px;
}
.article-content a:hover {
  color: var(--brand-800);
}
.site-cta {
  background: var(--brand-950);
  position: relative;
  overflow: hidden;
}
.fab-cta {
  position: fixed;
  bottom: 2rem;
  right: 2rem;
  z-index: 40;
  min-height: 44px;
  padding: 0.875rem 1.5rem;
  background: var(--brand-900);
  color: var(--white);
  border-radius: 4px;
  font-size: 0.875rem;
  font-weight: 500;
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  box-shadow: 0 6px 20px rgba(13,26,22,0.18);
  transition: all 0.25s ease;
}
.fab-cta:hover {
  background: var(--brand-700);
  transform: translateY(-1px);
  box-shadow: 0 8px 24px rgba(13,26,22,0.22);
}
.fab-cta-mobile {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  z-index: 40;
  background: var(--brand-900);
  color: var(--white);
  text-align: center;
  padding: 0.9rem 1rem;
  font-size: 0.875rem;
  font-weight: 500;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
}
.site-footer {
  background: var(--brand-950);
  color: rgba(255,255,255,0.72);
}
.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 3rem;
  padding: 4rem 0;
}
.footer-brand p {
  font-size: 0.875rem;
  line-height: 1.8;
  color: rgba(255,255,255,0.6);
  margin-top: 1rem;
  max-width: 22rem;
}
.footer-brand .logo-main {
  color: var(--white);
}
.footer-brand .logo-sub {
  color: var(--gold-400);
}
.footer-col {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
}
.footer-col h4 {
  color: var(--white);
  font-size: 0.875rem;
  font-weight: 600;
  letter-spacing: 0.05em;
  margin-bottom: 0.5rem;
}
.footer-col a,
.footer-col span {
  display: inline-flex;
  align-items: center;
  min-height: 36px;
  color: rgba(255,255,255,0.6);
  font-size: 0.875rem;
  transition: color 0.2s ease;
}
.footer-col a:hover {
  color: var(--white);
}
.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.1);
  padding: 1.5rem 0;
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 0.75rem;
  font-size: 0.8125rem;
  color: rgba(255,255,255,0.5);
}
.reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}
.reveal.in-view {
  opacity: 1;
  transform: none;
}
@media (prefers-reduced-motion: reduce) {
  * {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
  }
  .reveal {
    opacity: 1;
    transform: none;
  }
  html {
    scroll-behavior: auto;
  }
}
@media (max-width: 768px) {
  .footer-grid {
    grid-template-columns: 1fr 1fr;
    gap: 2rem;
  }
}
@media (max-width: 520px) {
  .footer-grid {
    grid-template-columns: 1fr;
  }
  .footer-bottom {
    flex-direction: column;
  }
}

/* roulang page: category3 */
:root {
            --brand-950: #0D1A16;
            --brand-900: #13261F;
            --brand-800: #1B3A30;
            --brand-700: #245343;
            --brand-600: #2C6B58;
            --brand-500: #3D8972;
            --brand-50: #EAF2EE;
            --gold-600: #A97C3A;
            --gold-500: #C6A15B;
            --gold-400: #D9BE80;
            --ink: #17241F;
            --muted: #5B6B64;
            --line: #DCE4DF;
            --paper: #F6F4EF;
            --white: #FFFFFF;
            --radius-sm: 4px;
            --radius-md: 6px;
            --shadow-hover: 0 8px 30px rgba(13, 26, 22, 0.08);
            --font-stack: "PingFang SC", "HarmonyOS Sans SC", "Microsoft YaHei", "Noto Sans SC", "Helvetica Neue", Arial, sans-serif;
        }

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

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: var(--font-stack);
            font-size: 16px;
            line-height: 1.75;
            color: var(--ink);
            background-color: var(--paper);
            -webkit-font-smoothing: antialiased;
            font-feature-settings: "tnum";
        }

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

        a {
            color: inherit;
            text-decoration: none;
            transition: color 0.25s ease, border-color 0.25s ease, background-color 0.25s ease, box-shadow 0.25s ease, transform 0.25s ease;
        }

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

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

        @media (min-width: 1024px) {
            .container {
                padding-left: 32px;
                padding-right: 32px;
            }
        }

        /* ── Header ── */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 50;
            background: rgba(246, 244, 239, 0.85);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border-bottom: 1px solid var(--line);
            height: 64px;
        }

        @media (min-width: 768px) {
            .site-header {
                height: 80px;
            }
        }

        .header-inner {
            height: 100%;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 24px;
        }

        .logo {
            display: flex;
            align-items: baseline;
            gap: 6px;
            line-height: 1.2;
        }

        .logo-main {
            font-size: 22px;
            font-weight: 700;
            letter-spacing: -0.02em;
            color: var(--brand-900);
        }

        .logo-sub {
            font-size: 13px;
            font-weight: 400;
            letter-spacing: 0.08em;
            color: var(--muted);
        }

        .main-nav {
            display: none;
            align-items: center;
            gap: 32px;
            margin-left: auto;
        }

        @media (min-width: 1024px) {
            .main-nav {
                display: flex;
            }
        }

        .nav-link {
            position: relative;
            font-size: 14px;
            letter-spacing: 0.04em;
            color: rgba(23, 36, 31, 0.65);
            padding: 8px 2px;
            line-height: 1.4;
            transition: color 0.25s ease;
        }

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

        .nav-link::after {
            content: "";
            position: absolute;
            left: 0;
            bottom: -2px;
            width: 100%;
            height: 2px;
            background: var(--brand-700);
            transform: scaleX(0);
            transform-origin: left center;
            transition: transform 0.3s ease;
        }

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

        .nav-link.active {
            color: var(--ink);
            font-weight: 500;
        }

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

        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            font-size: 14px;
            font-weight: 500;
            padding: 12px 24px;
            border-radius: var(--radius-sm);
            transition: all 0.3s ease;
            white-space: nowrap;
        }

        .btn-sm {
            padding: 8px 18px;
            font-size: 13px;
        }

        .btn-primary {
            background: var(--brand-900);
            color: var(--white);
        }

        .btn-primary:hover {
            background: var(--brand-700);
        }

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

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

        .btn-gold {
            background: var(--gold-500);
            color: var(--brand-950);
        }

        .btn-gold:hover {
            background: var(--gold-400);
        }

        .btn:focus-visible {
            outline: 2px solid var(--brand-600);
            outline-offset: 3px;
        }

        .btn .arrow {
            transition: transform 0.3s ease;
        }

        .btn:hover .arrow {
            transform: translateX(4px);
        }

        .mobile-toggle {
            display: flex;
            flex-direction: column;
            gap: 6px;
            padding: 10px 6px;
        }

        .mobile-toggle span {
            width: 22px;
            height: 2px;
            background: var(--ink);
            transition: all 0.3s ease;
        }

        .mobile-toggle.open span:nth-child(1) {
            transform: translateY(4px) rotate(45deg);
        }

        .mobile-toggle.open span:nth-child(2) {
            transform: translateY(-4px) rotate(-45deg);
        }

        @media (min-width: 1024px) {
            .mobile-toggle {
                display: none;
            }
        }

        .mobile-menu {
            display: none;
            position: fixed;
            top: 64px;
            left: 0;
            right: 0;
            z-index: 49;
            background: var(--paper);
            border-bottom: 1px solid var(--line);
            padding: 16px 24px 24px;
        }

        .mobile-menu.open {
            display: block;
        }

        .mobile-menu a {
            display: block;
            padding: 14px 0;
            font-size: 15px;
            color: var(--ink);
            border-bottom: 1px solid rgba(220, 228, 223, 0.7);
        }

        .mobile-menu a:last-child {
            border-bottom: none;
        }

        .mobile-menu a.active {
            color: var(--brand-700);
            font-weight: 600;
        }

        @media (min-width: 768px) {
            .mobile-menu {
                top: 80px;
            }
        }

        /* ── Hero ── */
        .hero-category {
            position: relative;
            background: var(--brand-950);
            overflow: hidden;
            padding: 100px 0 80px;
        }

        .hero-category::before {
            content: "";
            position: absolute;
            inset: 0;
            background-image: url("/assets/images/backpic/back-2.png");
            background-size: cover;
            background-position: center;
            opacity: 0.35;
        }

        .hero-category::after {
            content: "";
            position: absolute;
            inset: 0;
            background: linear-gradient(90deg, rgba(13, 26, 22, 0.9) 0%, rgba(13, 26, 22, 0.65) 50%, rgba(13, 26, 22, 0.45) 100%);
        }

        .hero-category .container {
            position: relative;
            z-index: 2;
        }

        .breadcrumb {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 13px;
            color: rgba(255, 255, 255, 0.6);
            margin-bottom: 32px;
        }

        .breadcrumb a:hover {
            color: var(--gold-400);
        }

        .breadcrumb .sep {
            color: rgba(255, 255, 255, 0.4);
        }

        .tag-label {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            font-size: 12px;
            letter-spacing: 0.28em;
            text-transform: uppercase;
            color: var(--gold-400);
            margin-bottom: 20px;
        }

        .tag-label::before {
            content: "";
            width: 28px;
            height: 1px;
            background: var(--gold-500);
        }

        .hero-title {
            font-size: 40px;
            line-height: 1.15;
            font-weight: 600;
            letter-spacing: -0.02em;
            color: var(--white);
            margin-bottom: 24px;
            max-width: 640px;
        }

        .hero-title .accent {
            color: var(--gold-400);
        }

        .hero-sub {
            font-size: 16px;
            line-height: 1.9;
            color: rgba(255, 255, 255, 0.7);
            max-width: 520px;
            margin-bottom: 40px;
        }

        .hero-actions {
            display: flex;
            flex-wrap: wrap;
            gap: 16px;
        }

        .hero-card {
            display: none;
            position: relative;
            z-index: 2;
            background: rgba(255, 255, 255, 0.08);
            border: 1px solid rgba(255, 255, 255, 0.14);
            border-radius: 6px;
            padding: 24px;
            backdrop-filter: blur(6px);
        }

        .hero-card .stat-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 16px;
        }

        .hero-card .stat-value {
            font-size: 28px;
            font-weight: 600;
            color: var(--gold-400);
            line-height: 1.2;
        }

        .hero-card .stat-label {
            font-size: 12px;
            color: rgba(255, 255, 255, 0.65);
            margin-top: 4px;
        }

        @media (min-width: 1024px) {
            .hero-category {
                padding: 120px 0 96px;
            }

            .hero-title {
                font-size: 60px;
            }

            .hero-sub {
                font-size: 17px;
            }

            .hero-card {
                display: block;
                position: absolute;
                right: 0;
                bottom: 40px;
                width: 300px;
            }
        }

        /* ── Section Common ── */
        .section {
            padding: 80px 0;
        }

        @media (min-width: 768px) {
            .section {
                padding: 100px 0;
            }
        }

        .section-label {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            font-size: 12px;
            letter-spacing: 0.25em;
            color: var(--brand-700);
            text-transform: uppercase;
            margin-bottom: 16px;
        }

        .section-label .num {
            color: var(--gold-600);
            font-weight: 500;
        }

        .section-title {
            font-size: 30px;
            font-weight: 600;
            line-height: 1.25;
            letter-spacing: -0.02em;
            color: var(--ink);
            margin-bottom: 12px;
        }

        @media (min-width: 768px) {
            .section-title {
                font-size: 36px;
            }
        }

        .section-desc {
            font-size: 15px;
            line-height: 1.8;
            color: var(--muted);
            max-width: 560px;
        }

        /* ── Timeline ── */
        .timeline-wrap {
            max-width: 840px;
            margin: 56px auto 0;
        }

        .timeline-item {
            position: relative;
            display: grid;
            grid-template-columns: 56px 1fr;
            gap: 24px;
            padding-bottom: 48px;
        }

        .timeline-item:last-child {
            padding-bottom: 0;
        }

        .timeline-item::before {
            content: "";
            position: absolute;
            left: 27px;
            top: 52px;
            bottom: 0;
            width: 1px;
            background: var(--line);
        }

        .timeline-item:last-child::before {
            display: none;
        }

        .timeline-num {
            position: relative;
            z-index: 2;
            width: 56px;
            height: 56px;
            display: flex;
            align-items: center;
            justify-content: center;
            border-radius: 50%;
            background: var(--brand-50);
            border: 1px solid var(--brand-600);
            font-size: 15px;
            font-weight: 600;
            color: var(--brand-700);
        }

        .timeline-body {
            padding-top: 4px;
        }

        .timeline-title {
            font-size: 20px;
            font-weight: 600;
            color: var(--ink);
            margin-bottom: 10px;
        }

        .timeline-desc {
            font-size: 15px;
            line-height: 1.85;
            color: var(--muted);
            max-width: 560px;
        }

        @media (min-width: 768px) {
            .timeline-wrap {
                margin-top: 72px;
            }

            .timeline-item {
                grid-template-columns: 72px 1fr;
                gap: 32px;
            }

            .timeline-item::before {
                left: 35px;
            }

            .timeline-num {
                width: 72px;
                height: 72px;
                font-size: 18px;
            }
        }

        /* ── Capability ── */
        .capability-grid {
            display: grid;
            grid-template-columns: 1fr;
            gap: 0;
            margin-top: 48px;
            border-top: 1px solid var(--line);
        }

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

        .capability-label {
            font-size: 14px;
            font-weight: 500;
            color: var(--ink);
        }

        .capability-value {
            font-size: 14px;
            line-height: 1.8;
            color: var(--muted);
        }

        @media (min-width: 768px) {
            .capability-grid {
                grid-template-columns: 1fr 1fr;
                gap: 0;
            }

            .capability-item {
                grid-template-columns: 140px 1fr;
                align-items: baseline;
                gap: 24px;
                padding: 32px 0;
                border-bottom: 1px solid var(--line);
            }

            .capability-item:nth-child(odd) {
                padding-right: 32px;
            }

            .capability-item:nth-child(even) {
                padding-left: 32px;
                border-left: 1px solid var(--line);
            }
        }

        /* ── Features Dark ── */
        .features-dark {
            background: var(--brand-950);
            color: var(--white);
        }

        .features-dark .section-title {
            color: var(--white);
        }

        .features-dark .section-desc {
            color: rgba(255, 255, 255, 0.6);
        }

        .features-dark .section-label {
            color: var(--gold-400);
        }

        .features-grid {
            margin-top: 56px;
            display: grid;
            grid-template-columns: 1fr;
            gap: 48px;
        }

        .feature-group-title {
            font-size: 18px;
            font-weight: 600;
            color: var(--gold-400);
            margin-bottom: 24px;
            letter-spacing: 0.02em;
        }

        .feature-list {
            border-top: 1px solid rgba(255, 255, 255, 0.12);
        }

        .feature-item {
            display: grid;
            grid-template-columns: 24px 1fr;
            gap: 16px;
            padding: 24px 0;
            border-bottom: 1px solid rgba(255, 255, 255, 0.12);
        }

        .feature-icon {
            width: 24px;
            height: 24px;
            color: var(--gold-500);
            flex-shrink: 0;
        }

        .feature-title {
            font-size: 15px;
            font-weight: 500;
            color: var(--white);
            margin-bottom: 6px;
        }

        .feature-desc {
            font-size: 14px;
            line-height: 1.8;
            color: rgba(255, 255, 255, 0.6);
        }

        @media (min-width: 768px) {
            .features-grid {
                grid-template-columns: 1fr 1fr;
                gap: 64px;
            }
        }

        /* ── FAQ ── */
        .faq-layout {
            display: grid;
            grid-template-columns: 1fr;
            gap: 48px;
        }

        @media (min-width: 1024px) {
            .faq-layout {
                grid-template-columns: 2fr 3fr;
                gap: 64px;
            }
        }

        .faq-cta {
            margin-top: 32px;
            padding-top: 32px;
            border-top: 1px solid var(--line);
        }

        .faq-cta p {
            font-size: 15px;
            color: var(--muted);
            margin-bottom: 20px;
        }

        .faq-list {
            border-top: 1px solid var(--line);
        }

        .faq-item {
            border-bottom: 1px solid var(--line);
        }

        .faq-question {
            width: 100%;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            text-align: left;
            font-size: 16px;
            font-weight: 500;
            color: var(--ink);
            padding: 22px 4px;
            min-height: 48px;
            transition: color 0.3s ease;
        }

        .faq-question:hover {
            color: var(--brand-700);
        }

        .faq-icon {
            width: 20px;
            height: 20px;
            position: relative;
            flex-shrink: 0;
            transition: transform 0.3s ease;
        }

        .faq-icon::before,
        .faq-icon::after {
            content: "";
            position: absolute;
            background: var(--brand-700);
            border-radius: 2px;
            transition: all 0.3s ease;
        }

        .faq-icon::before {
            width: 16px;
            height: 2px;
            left: 2px;
            top: 9px;
        }

        .faq-icon::after {
            width: 2px;
            height: 16px;
            left: 9px;
            top: 2px;
        }

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

        .faq-answer {
            display: none;
            padding: 0 4px 24px;
            font-size: 15px;
            line-height: 1.85;
            color: var(--muted);
            max-width: 640px;
        }

        .faq-item.open .faq-answer {
            display: block;
        }

        /* ── CTA ── */
        .cta-section {
            background: var(--brand-950);
            position: relative;
            overflow: hidden;
            padding: 80px 0;
            text-align: center;
        }

        .cta-section::before {
            content: "";
            position: absolute;
            top: -60%;
            right: -20%;
            width: 500px;
            height: 500px;
            border-radius: 50%;
            background: radial-gradient(circle, rgba(198, 161, 91, 0.14) 0%, transparent 70%);
        }

        .cta-section::after {
            content: "";
            position: absolute;
            bottom: -80%;
            left: -10%;
            width: 400px;
            height: 400px;
            border-radius: 50%;
            background: radial-gradient(circle, rgba(61, 137, 114, 0.12) 0%, transparent 70%);
        }

        .cta-inner {
            position: relative;
            z-index: 2;
        }

        .cta-title {
            font-size: 34px;
            font-weight: 600;
            letter-spacing: -0.02em;
            color: var(--white);
            margin-bottom: 16px;
            line-height: 1.2;
        }

        .cta-desc {
            font-size: 16px;
            line-height: 1.8;
            color: rgba(255, 255, 255, 0.6);
            max-width: 520px;
            margin: 0 auto 36px;
        }

        .cta-actions {
            display: flex;
            flex-wrap: wrap;
            justify-content: center;
            gap: 16px;
        }

        @media (min-width: 768px) {
            .cta-section {
                padding: 100px 0;
            }

            .cta-title {
                font-size: 44px;
            }
        }

        /* ── Footer ── */
        .site-footer {
            background: var(--brand-950);
            color: rgba(255, 255, 255, 0.7);
            padding: 64px 0 32px;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 1fr;
            gap: 40px;
            padding-bottom: 48px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.1);
        }

        .footer-brand .logo-main {
            color: var(--white);
        }

        .footer-brand .logo-sub {
            color: rgba(255, 255, 255, 0.5);
        }

        .footer-brand p {
            font-size: 14px;
            line-height: 1.8;
            margin-top: 16px;
            max-width: 300px;
            color: rgba(255, 255, 255, 0.5);
        }

        .footer-col h4 {
            font-size: 14px;
            font-weight: 500;
            color: var(--white);
            margin-bottom: 16px;
            letter-spacing: 0.04em;
        }

        .footer-col a,
        .footer-col span {
            display: block;
            font-size: 14px;
            line-height: 2;
            color: rgba(255, 255, 255, 0.55);
            transition: color 0.25s ease;
        }

        .footer-col a:hover {
            color: var(--white);
        }

        .footer-bottom {
            padding-top: 24px;
            display: flex;
            flex-direction: column;
            gap: 8px;
            font-size: 13px;
            color: rgba(255, 255, 255, 0.35);
        }

        @media (min-width: 768px) {
            .footer-grid {
                grid-template-columns: 2fr 1fr 1fr 1fr;
                gap: 48px;
            }

            .footer-bottom {
                flex-direction: row;
                justify-content: space-between;
                align-items: center;
            }
        }

        /* ── Float CTA ── */
        .float-cta {
            position: fixed;
            right: 24px;
            bottom: 24px;
            z-index: 40;
            background: var(--gold-500);
            color: var(--brand-950);
            font-size: 14px;
            font-weight: 600;
            padding: 14px 22px;
            border-radius: var(--radius-sm);
            box-shadow: 0 6px 24px rgba(13, 26, 22, 0.18);
            transition: all 0.3s ease;
            display: inline-flex;
            align-items: center;
            gap: 8px;
        }

        .float-cta:hover {
            background: var(--gold-400);
            transform: translateY(-2px);
            box-shadow: 0 10px 30px rgba(13, 26, 22, 0.22);
        }

        .float-cta:focus-visible {
            outline: 2px solid var(--brand-600);
            outline-offset: 3px;
        }

        @media (max-width: 640px) {
            .float-cta {
                left: 16px;
                right: 16px;
                bottom: 12px;
                justify-content: center;
                border-radius: var(--radius-sm);
            }
        }

        /* ── Animations ── */
        .fade-up {
            opacity: 0;
            transform: translateY(24px);
            transition: opacity 0.6s ease, transform 0.6s ease;
        }

        .fade-up.visible {
            opacity: 1;
            transform: translateY(0);
        }

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

            .fade-up {
                opacity: 1;
                transform: none;
            }
        }