/* roulang page: index */
:root {
  --bg-page: #F5F4F1;
  --bg-panel: #FCFBFA;
  --ink: #191A1C;
  --muted: #6F7477;
  --line: #E1DDD6;
  --brand: #C24F28;
  --brand-deep: #9F3D1B;
  --dark: #151719;
  --dark-line: #2F3336;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--bg-page);
  color: var(--ink);
  font-family: ui-sans-serif, system-ui, "PingFang SC", "Microsoft YaHei", "Noto Sans CJK SC", "Source Han Sans SC", sans-serif;
  font-size: 16px;
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

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

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

button,
input,
select,
textarea {
  font-family: inherit;
  font-size: inherit;
  line-height: inherit;
}

.container-site {
  max-width: 1200px;
  margin-left: auto;
  margin-right: auto;
  padding-left: 20px;
  padding-right: 20px;
}

@media (min-width: 768px) {
  .container-site {
    padding-left: 32px;
    padding-right: 32px;
  }
}

@media (min-width: 1024px) {
  .container-site {
    padding-left: 48px;
    padding-right: 48px;
  }
}

.section {
  padding-top: 72px;
  padding-bottom: 72px;
}

@media (min-width: 1024px) {
  .section {
    padding-top: 120px;
    padding-bottom: 120px;
  }
}

.section-label {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 16px;
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.14em;
  color: var(--brand);
}

.section-label::before {
  content: "";
  width: 24px;
  height: 2px;
  background: var(--brand);
}

.section-title {
  margin: 0 0 20px 0;
  font-size: 30px;
  line-height: 1.2;
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--ink);
}

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

.section-desc {
  margin: 0;
  max-width: 680px;
  font-size: 16px;
  line-height: 1.75;
  color: var(--muted);
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(252, 251, 250, 0.88);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--line);
}

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

.brand-logo {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-size: 21px;
  font-weight: 700;
  color: var(--ink);
  letter-spacing: -0.01em;
  white-space: nowrap;
}

.brand-mark {
  position: relative;
  width: 28px;
  height: 28px;
  border-radius: 4px;
  background: var(--brand);
  overflow: hidden;
  flex: none;
}

.brand-mark::before {
  content: "";
  position: absolute;
  left: 5px;
  top: 9px;
  width: 17px;
  height: 2px;
  background: #fff;
  transform: rotate(45deg);
}

.brand-mark::after {
  content: "";
  position: absolute;
  left: 5px;
  top: 17px;
  width: 17px;
  height: 2px;
  background: rgba(255, 255, 255, 0.8);
  transform: rotate(-45deg);
}

.main-nav {
  display: none;
  align-items: center;
  gap: 30px;
}

.nav-link {
  position: relative;
  padding-top: 8px;
  padding-bottom: 8px;
  font-size: 15px;
  font-weight: 500;
  color: var(--muted);
}

.nav-link::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: -20px;
  height: 2px;
  background: var(--brand);
  transform: scaleX(0);
  transform-origin: left center;
  transition: transform 0.25s ease;
}

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

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

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

.header-cta {
  display: none;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  height: 46px;
  padding: 0 24px;
  border: 1px solid transparent;
  border-radius: 4px;
  font-size: 15px;
  font-weight: 600;
  line-height: 1;
  cursor: pointer;
  transition: background-color 0.25s ease, border-color 0.25s ease, color 0.25s ease, transform 0.2s ease, box-shadow 0.2s ease;
}

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

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

.btn-primary:hover {
  background: var(--brand-deep);
  transform: translateY(-1px);
  box-shadow: 0 8px 22px -10px rgba(194, 79, 40, 0.65);
}

.btn-outline-light {
  background: transparent;
  border-color: rgba(255, 255, 255, 0.4);
  color: #fff;
}

.btn-outline-light:hover {
  border-color: #fff;
  background: #fff;
  color: var(--dark);
  transform: translateY(-1px);
}

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

.btn-outline-dark:hover {
  border-color: var(--dark);
  background: var(--dark);
  color: #fff;
  transform: translateY(-1px);
}

.btn-lg {
  height: 54px;
  padding: 0 32px;
  font-size: 16px;
}

.nav-toggle {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  border: 0;
  background: transparent;
  color: var(--ink);
  cursor: pointer;
}

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

.mobile-nav {
  display: none;
  border-top: 1px solid var(--line);
  background: var(--bg-panel);
}

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

.mobile-nav__links {
  margin: 0;
  padding: 0;
  list-style: none;
}

.mobile-nav__links a {
  display: flex;
  align-items: center;
  min-height: 48px;
  padding: 0 24px;
  border-bottom: 1px solid var(--line);
  font-size: 16px;
  font-weight: 500;
  color: var(--ink);
}

.mobile-nav__links a.is-active {
  color: var(--brand);
}

.mobile-nav__cta {
  padding: 16px 20px;
}

@media (min-width: 1024px) {
  .main-nav {
    display: flex;
  }
  .nav-link::after {
    bottom: -20px;
  }
  .header-cta {
    display: inline-flex;
  }
  .nav-toggle {
    display: none;
  }
  .mobile-nav {
    display: none !important;
  }
}

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

.hero-bg {
  position: absolute;
  inset: 0;
  background-image: url("/assets/images/backpic/back-1.png");
  background-position: center;
  background-size: cover;
  opacity: 0.12;
}

.hero-grid {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: 1fr;
  gap: 56px;
  align-items: center;
  padding-top: 80px;
  padding-bottom: 80px;
}

@media (min-width: 1024px) {
  .hero-grid {
    grid-template-columns: 1.05fr 0.95fr;
    gap: 72px;
    padding-top: 112px;
    padding-bottom: 110px;
  }
}

.hero-kicker {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 20px;
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.14em;
  color: rgba(255, 255, 255, 0.7);
}

.hero-kicker span {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--brand);
}

.hero-title {
  margin: 0;
  max-width: 680px;
  font-size: 38px;
  line-height: 1.12;
  font-weight: 700;
  letter-spacing: -0.025em;
}

@media (min-width: 768px) {
  .hero-title {
    font-size: 52px;
  }
}

@media (min-width: 1200px) {
  .hero-title {
    font-size: 62px;
  }
}

.hero-sub {
  margin: 28px 0 0 0;
  max-width: 580px;
  font-size: 17px;
  line-height: 1.78;
  color: rgba(255, 255, 255, 0.72);
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 38px;
}

.hero-media {
  position: relative;
}

.ratio-4-3 {
  aspect-ratio: 4 / 3;
}

.ratio-3-2 {
  aspect-ratio: 3 / 2;
}

.ratio-16-9 {
  aspect-ratio: 16 / 9;
}

.ratio-5-3 {
  aspect-ratio: 5 / 3;
}

.media-cover {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.hero-media__frame {
  position: relative;
  overflow: hidden;
  border-radius: 2px;
}

.hero-media__frame::after {
  content: "";
  position: absolute;
  inset: 0;
  border: 1px solid rgba(255, 255, 255, 0.16);
  pointer-events: none;
  border-radius: inherit;
}

.hero-media__note {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  margin-top: 18px;
  padding: 14px 16px;
  border-left: 3px solid var(--brand);
  background: rgba(255, 255, 255, 0.06);
  font-size: 14px;
  line-height: 1.7;
  color: rgba(255, 255, 255, 0.75);
}

.trust-wrap {
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  background: var(--bg-panel);
}

.trust-strip {
  display: grid;
  grid-template-columns: 1fr 1fr;
}

.trust-strip__item {
  position: relative;
  padding: 20px 14px;
  text-align: center;
  font-size: 15px;
  font-weight: 700;
  color: var(--muted);
  letter-spacing: 0.05em;
}

.trust-strip__item + .trust-strip__item::before {
  content: "";
  position: absolute;
  left: 0;
  top: 18%;
  bottom: 18%;
  width: 1px;
  background: var(--line);
}

@media (min-width: 768px) {
  .trust-strip {
    grid-template-columns: repeat(4, 1fr);
  }
}

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

@media (min-width: 768px) {
  .flow-grid {
    gap: 48px;
  }
}

@media (min-width: 1024px) {
  .flow-grid {
    grid-template-columns: repeat(3, 1fr);
    gap: 56px;
  }
}

.flow-step {
  border-top: 2px solid var(--ink);
  padding-top: 20px;
}

.flow-step__num {
  display: block;
  margin-bottom: 20px;
  font-size: 52px;
  line-height: 1;
  font-weight: 700;
  color: var(--brand);
  font-variant-numeric: tabular-nums;
  letter-spacing: -0.04em;
}

.flow-step h3 {
  margin: 0 0 14px 0;
  font-size: 20px;
  font-weight: 700;
  line-height: 1.4;
  color: var(--ink);
}

.flow-step p {
  margin: 0 0 18px 0;
  font-size: 15px;
  line-height: 1.75;
  color: var(--muted);
}

.link-arrow {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 14px;
  font-weight: 700;
  color: var(--brand);
}

.link-arrow i {
  font-style: normal;
  display: inline-block;
  transition: transform 0.2s ease;
}

.link-arrow:hover {
  color: var(--brand-deep);
}

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

.panel-card {
  background: var(--bg-panel);
  border: 1px solid var(--line);
  border-radius: 2px;
  transition: transform 0.25s ease, border-color 0.25s ease, box-shadow 0.25s ease;
}

.panel-card:hover {
  border-color: #d3cfc7;
  transform: translateY(-2px);
  box-shadow: 0 18px 38px -22px rgba(25, 26, 28, 0.24);
}

.case-card__media {
  overflow: hidden;
}

.case-card__media .media-cover {
  transition: transform 0.35s ease;
}

.case-card:hover .media-cover {
  transform: scale(1.025);
}

.badge {
  display: inline-flex;
  align-items: center;
  min-height: 28px;
  padding: 0 12px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: #fff;
  font-size: 13px;
  font-weight: 600;
  color: var(--brand);
  white-space: nowrap;
}

.badge-neutral {
  color: var(--muted);
}

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

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

.faq-item summary {
  list-style: none;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 22px;
  padding: 22px 0;
  cursor: pointer;
  font-size: 17px;
  font-weight: 700;
  color: var(--ink);
}

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

.faq-item summary:focus-visible {
  outline: 2px solid var(--brand);
  outline-offset: 3px;
  border-radius: 4px;
}

.faq-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  flex: none;
  width: 26px;
  height: 26px;
  border-radius: 50%;
  border: 1px solid var(--line);
  color: var(--brand);
  transition: transform 0.25s ease, background-color 0.25s ease, border-color 0.25s ease;
}

.faq-icon svg {
  width: 14px;
  height: 14px;
}

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

.faq-answer {
  padding: 0 40px 24px 0;
  font-size: 16px;
  line-height: 1.75;
  color: var(--muted);
}

.faq-answer p {
  margin: 0 0 10px 0;
}

@media (max-width: 639px) {
  .faq-item summary {
    font-size: 16px;
  }
  .faq-answer {
    padding-right: 0;
  }
}

.article-row {
  display: block;
  padding: 22px 24px;
  border-bottom: 1px solid var(--line);
  transition: background-color 0.25s ease;
}

.article-row:last-child {
  border-bottom: 0;
}

.article-row:hover {
  background: #fff;
}

.article-row__top {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 10px 16px;
  margin-bottom: 10px;
}

.article-row__top span,
.article-row__meta {
  font-size: 13px;
  color: var(--muted);
  font-variant-numeric: tabular-nums;
}

.article-row h3 {
  margin: 0 0 8px 0;
  font-size: 18px;
  font-weight: 700;
  line-height: 1.4;
  color: var(--ink);
}

.article-row p {
  margin: 0;
  font-size: 15px;
  line-height: 1.65;
  color: var(--muted);
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.article-row__arrow {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  margin-top: 10px;
  font-size: 13px;
  font-weight: 700;
  color: var(--brand);
}

.article-row__arrow i {
  font-style: normal;
  display: inline-block;
  transition: transform 0.2s ease;
}

.article-row:hover .article-row__arrow i {
  transform: translateX(4px);
}

.cms-empty {
  padding: 44px 20px;
  text-align: center;
  color: var(--muted);
  background: var(--bg-panel);
  border: 1px dashed var(--line);
  border-radius: 4px;
}

.cta-panel {
  position: relative;
  background: var(--dark);
  color: #fff;
  overflow: hidden;
}

.cta-panel__bg {
  position: absolute;
  inset: 0;
  background: radial-gradient(circle at 75% 20%, rgba(194, 79, 40, 0.18), transparent 38%), linear-gradient(180deg, rgba(255,255,255,0.02), transparent), url("/assets/images/backpic/back-2.png");
  background-size: cover;
  background-position: center;
  opacity: 0.12;
}

.cta-panel__inner {
  position: relative;
  z-index: 1;
}

.cta-title {
  margin: 0 0 18px 0;
  font-size: 28px;
  line-height: 1.25;
  font-weight: 700;
  letter-spacing: -0.02em;
  color: #fff;
}

@media (min-width: 768px) {
  .cta-title {
    font-size: 38px;
  }
}

.cta-desc {
  margin: 0 auto;
  max-width: 640px;
  font-size: 16px;
  line-height: 1.75;
  color: rgba(255, 255, 255, 0.7);
}

.form-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
}

@media (min-width: 768px) {
  .form-grid {
    grid-template-columns: 1fr 1fr;
    column-gap: 18px;
  }
  .form-grid .form-field-full {
    grid-column: 1 / -1;
  }
}

.form-field label {
  display: block;
  margin-bottom: 8px;
  font-size: 14px;
  font-weight: 600;
  color: rgba(255, 255, 255, 0.8);
}

.form-field input,
.form-field select,
.form-field textarea {
  width: 100%;
  border: 1px solid rgba(255, 255, 255, 0.16);
  background: rgba(255, 255, 255, 0.08);
  color: #fff;
  border-radius: 4px;
  padding: 12px 14px;
  font-size: 15px;
  transition: border-color 0.2s ease, box-shadow 0.2s ease, background-color 0.2s ease;
}

.form-field input {
  height: 48px;
}

.form-field textarea {
  min-height: 120px;
  resize: vertical;
}

.form-field input:focus,
.form-field select:focus,
.form-field textarea:focus {
  outline: none;
  border-color: var(--brand);
  background: rgba(255, 255, 255, 0.12);
  box-shadow: 0 0 0 3px rgba(194, 79, 40, 0.3);
}

.form-field select {
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='14' height='8' fill='none'%3E%3Cpath d='M1 1l6 6 6-6' stroke='%23fff' stroke-width='1.6'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 14px center;
  padding-right: 42px;
}

.form-field select option {
  color: var(--ink);
  background: #fff;
}

.site-footer {
  background: var(--dark);
  color: rgba(255, 255, 255, 0.7);
}

.site-footer__brand {
  font-size: 22px;
  font-weight: 700;
  color: #fff;
  letter-spacing: -0.01em;
}

.site-footer a.footer-link {
  color: rgba(255, 255, 255, 0.7);
  font-size: 14px;
  line-height: 2;
}

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

.footer-bottom {
  border-top: 1px solid var(--dark-line);
  color: rgba(255, 255, 255, 0.45);
  font-size: 13px;
  font-variant-numeric: tabular-nums;
  padding-top: 20px;
  padding-bottom: 24px;
}

.footer-bottom a {
  color: rgba(255, 255, 255, 0.55);
}

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

html.js [data-reveal] {
  opacity: 0;
  transform: translateY(12px);
  transition: opacity 0.5s ease, transform 0.5s ease;
}

html.js [data-reveal].is-visible {
  opacity: 1;
  transform: none;
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
  *,
  *::before,
  *::after {
    transition: none !important;
    animation: none !important;
  }
  html.js [data-reveal] {
    opacity: 1;
    transform: none;
  }
  .hero-media__frame .media-cover,
  .case-card:hover .case-card__media .media-cover {
    transform: none;
  }
}

.copyright-domain {
  word-break: break-all;
}

/* roulang page: article */
:root {
  --bg-page: #F5F4F1;
  --bg-panel: #FCFBFA;
  --ink: #191A1C;
  --muted: #6F7477;
  --line: #E1DDD6;
  --brand: #C24F28;
  --brand-deep: #9F3D1B;
  --dark: #151719;
  --dark-line: #2F3336;
  --radius: 4px;
  --radius-card: 6px;
}

/* Base reset */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
html.article-page { background: var(--bg-page); }
body {
  font-family: ui-sans-serif, system-ui, PingFang SC, Microsoft YaHei, Noto Sans CJK SC, Source Han Sans SC, sans-serif;
  background: var(--bg-page);
  color: var(--ink);
  font-size: 16px;
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; transition: color .2s ease; }
button, input, textarea, select { font: inherit; color: inherit; }

.container-site {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding-left: 20px;
  padding-right: 20px;
}
@media (min-width: 640px) {
  .container-site { padding-left: 32px; padding-right: 32px; }
}
@media (min-width: 1024px) {
  .container-site { padding-left: 48px; padding-right: 48px; }
}

/* ========== Header / Nav ========== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 80;
  background: rgba(255,255,255,.96);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid transparent;
  transition: border-color .3s ease, box-shadow .3s ease;
}
.site-header.is-scrolled {
  border-bottom-color: rgba(225,221,214,.9);
  box-shadow: 0 8px 30px rgba(21,23,25,.05);
}

.header-toolbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding-left: 20px;
  padding-right: 20px;
}
@media (min-width: 640px) {
  .header-toolbar { padding-left: 32px; padding-right: 32px; }
}
@media (min-width: 1024px) {
  .header-toolbar { padding-left: 48px; padding-right: 48px; }
}

.brand { display: flex; align-items: center; gap: 10px; flex-shrink: 0; }
.brand-mark {
  width: 30px; height: 30px; display: inline-flex; align-items: center; justify-content: center;
  border-radius: 2px; background: var(--dark); color: #fff; font-size: 15px; font-weight: 700; letter-spacing: -.5px;
}
.brand-text {
  font-size: 19px;
  font-weight: 700;
  color: var(--ink);
  letter-spacing: .02em;
  white-space: nowrap;
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 26px;
}
.main-nav { display: flex; align-items: center; gap: 24px; }
.nav-link {
  position: relative;
  font-size: 15px;
  font-weight: 500;
  color: var(--muted);
  padding: 8px 2px;
  line-height: 1.4;
  white-space: nowrap;
  transition: color .2s ease;
}
.nav-link:hover { color: var(--ink); }
.nav-link.is-active { color: var(--ink); font-weight: 600; }
.nav-link.is-active::after {
  content: "";
  position: absolute;
  left: 0; right: 0; bottom: -2px;
  height: 2px;
  background: var(--brand);
  border-radius: 2px 2px 0 0;
}
.nav-cta { flex-shrink: 0; }
.btn-nav-cta {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  height: 40px;
  padding: 0 20px;
  background: var(--dark);
  color: #fff;
  font-size: 14px;
  font-weight: 600;
  border-radius: var(--radius);
  transition: background .2s ease, transform .2s ease, box-shadow .2s ease;
}
.btn-nav-cta:hover { background: #22262a; transform: translateY(-1px); box-shadow: 0 8px 24px rgba(21,23,25,.16); }
.btn-nav-cta:focus-visible { outline: 2px solid var(--brand); outline-offset: 2px; }

.nav-toggle {
  display: none;
  width: 42px; height: 42px;
  align-items: center; justify-content: center;
  border: 1px solid var(--line);
  background: #fff;
  color: var(--ink);
  border-radius: var(--radius);
  cursor: pointer;
}
.nav-toggle svg { width: 20px; height: 20px; }
.nav-toggle:focus-visible { outline: 2px solid var(--brand); outline-offset: 2px; }

@media (max-width: 930px) {
  .nav-toggle { display: inline-flex; }
  .site-nav {
    position: absolute;
    top: 64px;
    left: 0; right: 0;
    background: #fff;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: 16px 20px 24px;
    border-bottom: 1px solid var(--line);
    box-shadow: 0 20px 40px rgba(21,23,25,.08);
    transform: translateY(-8px);
    opacity: 0;
    visibility: hidden;
    transition: transform .25s ease, opacity .25s ease, visibility .25s ease;
  }
  .site-nav.open {
    transform: translateY(0);
    opacity: 1;
    visibility: visible;
  }
  .main-nav { flex-direction: column; align-items: stretch; gap: 2px; width: 100%; }
  .nav-link { font-size: 16px; padding: 14px 6px; border-bottom: 1px solid #f1eeea; border-radius: 0; }
  .nav-link.is-active { background: transparent; }
  .nav-link.is-active::after { bottom: 8px; height: 1.5px; }
  .nav-cta { margin-top: 14px; }
  .btn-nav-cta { width: 100%; height: 48px; }
}

main { overflow: hidden; }

/* ========== Article head banner ========== */
.article-banner {
  position: relative;
  background: var(--dark);
  color: #fff;
  padding: 72px 0 88px;
  isolation: isolate;
}
.article-banner::before {
  content: "";
  position: absolute;
  inset: 0;
  background: url('/assets/images/backpic/back-1.png') center / cover no-repeat;
  opacity: .25;
  z-index: -1;
}
.article-banner::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(to bottom, rgba(21,23,25,.65), rgba(21,23,25,.88));
  z-index: -1;
}
.breadcrumb-line {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px;
  font-size: 14px;
  color: rgba(255,255,255,.62);
  margin-bottom: 24px;
}
.breadcrumb-line a { color: rgba(255,255,255,.82); transition: color .2s ease; }
.breadcrumb-line a:hover { color: #fff; }
.breadcrumb-line .sep { color: rgba(255,255,255,.35); opacity: .7; }

.article-title {
  font-size: 32px;
  line-height: 1.2;
  font-weight: 700;
  color: #fff;
  letter-spacing: -.01em;
  max-width: 880px;
  margin: 0;
}
@media (min-width: 768px) {
  .article-title { font-size: 44px; line-height: 1.15; }
}
@media (min-width: 1200px) {
  .article-title { font-size: 52px; line-height: 1.12; }
}

.article-meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 18px;
  margin-top: 26px;
}
.article-meta-item {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  color: rgba(255,255,255,.64);
  letter-spacing: .01em;
}
.article-meta-item svg { width: 16px; height: 16px; opacity: .72; }

/* ========== Article reading body ========== */
.article-wrap {
  position: relative;
  z-index: 2;
  margin-top: -34px;
  padding-bottom: 72px;
}
.article-shell {
  max-width: 760px;
  margin: 0 auto;
}
.article-card {
  background: var(--bg-panel);
  border: 1px solid var(--line);
  border-radius: var(--radius-card);
  box-shadow: 0 1px 2px rgba(21,23,25,0.03), 0 20px 60px rgba(21,23,25,0.06);
  padding: clamp(28px, 6vw, 56px);
}
@media (min-width: 768px) {
  .article-wrap { padding-bottom: 104px; }
}

.article-body {
  font-size: 17px;
  line-height: 1.85;
  color: #23262A;
  overflow-wrap: break-word;
  word-break: break-word;
}
.article-body > * + * { margin-top: 1.25em; }

.article-body h2 {
  font-size: 27px;
  line-height: 1.3;
  font-weight: 700;
  color: var(--ink);
  margin-top: 1.8em;
  margin-bottom: .55em;
  letter-spacing: -.01em;
}
.article-body h3 {
  font-size: 21px;
  line-height: 1.4;
  font-weight: 700;
  color: var(--ink);
  margin-top: 1.7em;
  margin-bottom: .45em;
}
.article-body h4 {
  font-size: 18px;
  font-weight: 700;
  color: var(--ink);
  margin-top: 1.5em;
  margin-bottom: .4em;
}
.article-body p {
  margin: 0;
  line-height: 1.85;
  color: #34373B;
}
.article-body a { color: var(--brand); text-decoration: underline; text-decoration-color: rgba(194,79,40,.35); text-underline-offset: 4px; }
.article-body a:hover { color: var(--brand-deep); text-decoration-color: currentColor; }
.article-body strong, .article-body b { color: var(--ink); font-weight: 600; }
.article-body ul, .article-body ol { margin: 0; padding-left: 1.2em; }
.article-body ul { list-style: none; padding-left: 0; }
.article-body ul li { position: relative; padding-left: 1.35em; margin:.35em 0; }
.article-body ul li::before { content:""; position: absolute; left: 0; top: .66em; width: 6px; height: 6px; background: var(--brand); border-radius: 999px; }
.article-body ol { list-style: decimal; }
.article-body ol li { padding-left: .2em; margin:.3em 0; }
.article-body blockquote {
  border-left: 3px solid var(--brand);
  background: #FDF5F1;
  color: #4A4440;
  margin: 1.8em 0;
  padding: 16px 22px;
  border-radius: 0 var(--radius) var(--radius) 0;
}
.article-body blockquote p { margin: .2em 0; }
.article-body img { border-radius: 4px; margin: 2em 0; width: auto; max-width: 100%; height: auto; }
.article-body figure { margin: 2em 0; }
.article-body figcaption { text-align: center; font-size: 13px; color: var(--muted); margin-top: .75em; }
.article-body pre {
  background: var(--dark);
  color: #E9E6DF;
  border-radius: 4px;
  padding: 20px 24px;
  overflow-x: auto;
  font-size: 14px;
  line-height: 1.7;
}
.article-body code { font-family: ui-monospace, SFMono-Regular, Menlo, monospace; font-size: .875em; }
.article-body pre code { background: transparent; color: inherit; }
.article-body hr { border: 0; border-top: 1px solid var(--line); margin: 2.2em 0; }

.article-body table { width: 100%; border-collapse: collapse; font-size: 15px; line-height: 1.6; margin: 2em 0; }
.article-body th {
  background: #EDEBE6;
  color: var(--ink);
  text-align: left;
  font-weight: 600;
  font-size: 14px;
  padding: 12px 14px;
  border: 1px solid #D9D5CD;
  white-space: nowrap;
}
.article-body td { padding: 12px 14px; border: 1px solid #E1DDD6; color: #3A3D42; vertical-align: top; }

.article-not-found {
  text-align: center;
  padding: 52px 16px 64px;
}
.article-not-found__title { font-size: 22px; font-weight: 700; color: var(--ink); }
.article-not-found__sub { color: var(--muted); margin: 14px 0 24px; font-size: 15px; line-height: 1.8; }

/* ========== Article bottom nav ========== */
.article-endline {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  flex-wrap: wrap;
  margin-top: 44px;
  padding-top: 28px;
  border-top: 1px solid var(--line);
}
.article-endline a {
  font-size: 15px;
  font-weight: 600;
  color: var(--ink);
  display: inline-flex;
  align-items: center;
  gap: 8px;
  transition: color .2s ease, gap .2s ease;
}
.article-endline a:hover { color: var(--brand); gap: 12px; }

/* ========== Related modules ========== */
.related-section { padding: 88px 0; }
@media (min-width: 1024px) { .related-section { padding: 120px 0; } }

.section-label {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-size: 13px;
  font-weight: 600;
  color: var(--brand);
  letter-spacing: .12em;
  text-transform: uppercase;
}
.section-label::before { content:""; width: 24px; height: 1px; background: var(--brand); opacity:.7; }
.section-title {
  font-size: 30px;
  line-height: 1.2;
  font-weight: 700;
  color: var(--ink);
  letter-spacing: -.01em;
  margin-top: 14px;
}
@media (min-width: 1024px) { .section-title { font-size: 38px; } }

.related-cards {
  display: grid;
  grid-template-columns: 1fr;
  gap: 20px;
  margin-top: 40px;
}
@media (min-width: 768px) {
  .related-cards { grid-template-columns: repeat(3, 1fr); }
}

.related-card {
  background: var(--bg-panel);
  border: 1px solid var(--line);
  border-radius: var(--radius-card);
  padding: 22px 22px 24px;
  display: flex;
  flex-direction: column;
  transition: border-color .25s ease, transform .25s ease, box-shadow .25s ease;
}
.related-card:hover {
  border-color: #C6BFB6;
  transform: translateY(-2px);
  box-shadow: 0 8px 30px rgba(21,23,25,.05);
}
.related-card__tag {
  display: inline-flex;
  align-self: flex-start;
  align-items: center;
  height: 26px;
  padding: 0 10px;
  font-size: 12px;
  font-weight: 600;
  color: var(--brand);
  background: #FBE9E1;
  border-radius: 999px;
}
.related-card__title {
  margin-top: 16px;
  font-size: 14px;
  font-weight: 700;
  color: var(--ink);
  line-height: 1.5;
  max-width: 100%;
}
.related-card__desc {
  font-size: 14px;
  color: var(--muted);
  line-height: 1.7;
  margin-top: 8px;
  flex: 1;
}
.related-card__link {
  margin-top: 18px;
  font-size: 14px;
  font-weight: 600;
  color: var(--brand);
  display: inline-flex;
  align-items: center;
  gap: 7px;
}
.related-card__link:hover { color: var(--brand-deep); }
.related-card__link svg { width: 14px; height: 14px; transition: transform .2s ease; }
.related-card__link:hover svg { transform: translateX(3px); }

/* ========== CTA section ========== */
.cta-panel {
  background: var(--dark);
  color: #fff;
  padding: 88px 0;
}
@media (min-width: 1024px) {
  .cta-panel { padding: 112px 0; }
}
.cta-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 40px;
  align-items: start;
}
@media (min-width: 1024px) {
  .cta-grid { grid-template-columns: 1fr 1fr; gap: 72px; align-items: center; }
}
.cta-title {
  font-size: 30px;
  line-height: 1.25;
  font-weight: 700;
  color: #fff;
  letter-spacing: -.01em;
}
@media (min-width: 768px) { .cta-title { font-size: 38px; } }
.cta-lead { color: rgba(255,255,255,.68); margin-top: 18px; font-size: 16px; line-height: 1.8; max-width: 38em; }
.cta-points { margin-top: 32px; display: flex; flex-direction: column; gap: 14px; }
.cta-point { display: flex; align-items: flex-start; gap: 10px; font-size: 15px; color: rgba(255,255,255,.76); }
.cta-point::before { content:""; flex-shrink:0; width: 6px; height: 6px; border-radius: 999px; background: var(--brand); margin-top: .55em; }

.apply-form-card {
  background: #fff;
  border-radius: var(--radius-card);
  padding: 28px;
  box-shadow: 0 20px 50px rgba(0,0,0,.14);
}
@media (min-width: 768px) {
  .apply-form-card { padding: 34px; }
}
.form-grid { display: grid; grid-template-columns: 1fr; gap: 18px; }
@media (min-width: 640px) {
  .form-grid { grid-template-columns: 1fr 1fr; }
  .form-field-full { grid-column: 1 / -1; }
}
.form-label { display: block; font-size: 14px; font-weight: 600; color: var(--ink); margin-bottom: 7px; }
.form-field {
  width: 100%;
  height: 48px;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 0 14px;
  font-size: 15px;
  color: var(--ink);
  transition: border-color .2s ease, box-shadow .2s ease;
}
textarea.form-field { height: auto; min-height: 120px; padding-top: 12px; resize: vertical; }
.form-field::placeholder { color: #B0ACA5; }
.form-field:focus {
  outline: none;
  border-color: var(--brand);
  box-shadow: 0 0 0 3px rgba(194,79,40,.12);
}
.apply-submit {
  width: 100%;
  height: 52px;
  background: var(--brand);
  color: #fff;
  border: 0;
  border-radius: var(--radius);
  font-size: 16px;
  font-weight: 700;
  cursor: pointer;
  transition: background .2s ease, transform .2s ease, box-shadow .2s ease;
}
.apply-submit:hover { background: var(--brand-deep); transform: translateY(-1px); box-shadow: 0 10px 24px rgba(159,61,27,.22); }
.apply-submit:focus-visible { outline: 2px solid var(--dark); outline-offset: 3px; }
.form-note { font-size: 12px; color: #a19b93; margin-top: 14px; line-height: 1.7; text-align: center; }

/* ========== Footer ========== */
.site-footer {
  background: var(--dark);
  color: rgba(255,255,255,.62);
}
.site-footer .footer-brand { font-size: 24px; font-weight: 700; color: #fff; line-height: 1.2; }
.footer-link {
  display: inline-block;
  font-size: 14px;
  line-height: 2.2;
  color: rgba(255,255,255,.54);
  transition: color .2s ease, padding-left .2s ease;
}
.footer-link:hover { color: #fff; padding-left: 4px; }
@media (min-width: 768px) {
  .footer-link:hover { padding-left: 2px; }
}

/* ========== Generic blocks ========== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  min-height: 44px;
  padding: 0 22px;
  border-radius: var(--radius);
  font-size: 15px;
  font-weight: 600;
  transition: background .2s ease, border-color .2s ease, color .2s ease, transform .2s ease, box-shadow .2s ease;
}
.btn-primary {
  background: var(--brand);
  color: #fff;
}
.btn-primary:hover { background: var(--brand-deep); color:#fff; transform: translateY(-1px); box-shadow: 0 8px 24px rgba(194,79,40,.2); }
.btn-primary:focus-visible { outline: 2px solid var(--dark); outline-offset: 3px; }
.btn-outline {
  background: transparent;
  border: 1px solid rgba(255,255,255,.28);
  color: #fff;
}
.btn-outline:hover { border-color:#fff; color:#fff; }

/* Focus */
a:focus-visible, button:focus-visible { outline: 2px solid var(--brand); outline-offset: 4px; }

/* Animations */
.scroll-fade {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity .55s ease, transform .55s ease;
}
.scroll-fade.is-visible { opacity: 1; transform: translateY(0); }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation-duration: .01ms !important; transition-duration: .01ms !important; }
  .scroll-fade { opacity: 1; transform: none; transition: none; }
  .article-title, .related-card { transition: none; }
}

/* useful small system */
.tabular {
  font-variant-numeric: tabular-nums;
}

/* roulang page: category1 */
:root {
    --bg-page: #F5F4F1;
    --bg-panel: #FCFBFA;
    --ink: #191A1C;
    --muted: #6F7477;
    --line: #E1DDD6;
    --brand: #C24F28;
    --brand-deep: #9F3D1B;
    --dark: #151719;
    --dark-line: #2F3336;
  }

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

  html {
    scroll-behavior: smooth;
  }

  body {
    margin: 0;
    background: var(--bg-page);
    color: var(--ink);
    font-family: ui-sans-serif, system-ui, -apple-system, "PingFang SC", "Microsoft YaHei", "Noto Sans CJK SC", "Source Han Sans SC", sans-serif;
    font-size: 16px;
    line-height: 1.75;
    -webkit-font-smoothing: antialiased;
    text-rendering: optimizeLegibility;
  }

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

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

  button,
  input,
  select,
  textarea {
    font: inherit;
  }

  h1,
  h2,
  h3 {
    margin: 0;
    color: var(--ink);
    line-height: 1.15;
    letter-spacing: -0.01em;
  }

  ::selection {
    background: rgba(194, 79, 40, 0.18);
    color: var(--ink);
  }

  .container-site {
    width: min(1200px, calc(100% - 40px));
    margin-inline: auto;
  }

  @media (min-width: 768px) {
    .container-site {
      width: calc(100% - 64px);
    }
  }

  @media (min-width: 1200px) {
    .container-site {
      width: 1200px;
      max-width: 1200px;
      margin-inline: auto;
    }
  }

  .site-section {
    padding: 76px 0;
  }

  @media (min-width: 768px) {
    .site-section {
      padding: 104px 0;
    }
  }

  .section-label {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    font-size: 13px;
    font-weight: 600;
    letter-spacing: 0.14em;
    color: var(--brand);
  }

  .section-label::before {
    content: "";
    display: block;
    width: 20px;
    height: 1px;
    background: var(--brand);
  }

  .chapter-tag {
    display: inline-flex;
    align-items: center;
    min-height: 28px;
    padding: 0 12px;
    border: 1px solid rgba(194, 79, 40, 0.32);
    border-radius: 999px;
    font-size: 13px;
    font-weight: 600;
    color: var(--brand);
    background: rgba(194, 79, 40, 0.06);
    line-height: 1;
  }

  .site-header {
    position: sticky;
    top: 0;
    z-index: 40;
    height: 68px;
    background: rgba(252, 251, 250, 0.92);
    backdrop-filter: blur(14px);
    -webkit-backdrop-filter: blur(14px);
    border-bottom: 1px solid transparent;
    transition: border-color 0.2s ease, box-shadow 0.2s ease;
  }

  .site-header.is-scrolled {
    border-bottom-color: rgba(225, 221, 214, 0.86);
    box-shadow: 0 8px 28px rgba(21, 23, 25, 0.04);
  }

  .header-inner {
    height: 68px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 24px;
  }

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

  .brand-logo__mark {
    width: 32px;
    height: 32px;
    border-radius: 6px;
    background: linear-gradient(135deg, var(--brand), #5D2B1C);
    position: relative;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    box-shadow: inset 0 0 0 1px rgba(255, 255, 255, 0.16);
  }

  .brand-logo__mark span {
    width: 10px;
    height: 10px;
    border-radius: 2px;
    background: rgba(255, 255, 255, 0.88);
  }

  .brand-logo__text {
    font-size: 19px;
    font-weight: 700;
    color: var(--ink);
    letter-spacing: 0.02em;
    white-space: nowrap;
  }

  .main-nav {
    display: flex;
    align-items: center;
    gap: 2px;
    margin-left: auto;
  }

  .nav-link {
    display: inline-flex;
    align-items: center;
    height: 68px;
    padding: 0 14px;
    font-size: 15px;
    font-weight: 500;
    color: #43484C;
    position: relative;
    transition: color 0.2s ease;
    white-space: nowrap;
  }

  .nav-link::after {
    content: "";
    position: absolute;
    left: 14px;
    right: 14px;
    bottom: 0;
    height: 2px;
    background: var(--brand);
    transform: scaleX(0);
    transform-origin: left center;
    transition: transform 0.24s ease;
  }

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

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

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

  .nav-cta {
    margin-left: 12px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    height: 42px;
    padding: 0 22px;
    border-radius: 4px;
    background: var(--brand);
    color: #fff;
    font-size: 14px;
    font-weight: 600;
    box-shadow: 0 1px 2px rgba(21, 23, 25, 0.06);
    transition: background 0.2s ease, transform 0.2s ease, box-shadow 0.2s ease;
  }

  .nav-cta:hover {
    background: var(--brand-deep);
    transform: translateY(-1px);
    box-shadow: 0 8px 20px rgba(194, 79, 40, 0.18);
  }

  .nav-toggle {
    display: none;
    width: 42px;
    height: 42px;
    align-items: center;
    justify-content: center;
    background: transparent;
    border: 1px solid var(--line);
    border-radius: 6px;
    cursor: pointer;
    color: var(--ink);
  }

  .nav-toggle svg {
    width: 18px;
    height: 18px;
    stroke: currentColor;
    stroke-width: 2;
    fill: none;
    stroke-linecap: round;
  }

  @media (max-width: 1023px) {
    .nav-toggle {
      display: inline-flex;
      margin-left: 8px;
    }

    .main-nav {
      display: none;
      position: absolute;
      top: 68px;
      left: 0;
      right: 0;
      flex-direction: column;
      align-items: stretch;
      gap: 0;
      padding: 10px 20px 20px;
      background: rgba(252, 251, 250, 0.98);
      border-bottom: 1px solid var(--line);
      box-shadow: 0 20px 40px rgba(21, 23, 25, 0.06);
    }

    .main-nav.is-open {
      display: flex;
    }

    .nav-link {
      height: 50px;
      padding: 0 8px;
      justify-content: flex-start;
      border-bottom: 1px solid rgba(225, 221, 214, 0.48);
    }

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

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

    .nav-cta {
      display: none;
    }
  }

  .btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border: 1px solid transparent;
    border-radius: 4px;
    height: 48px;
    padding: 0 24px;
    font-size: 15px;
    font-weight: 600;
    cursor: pointer;
    white-space: nowrap;
    transition: background 0.2s ease, border-color 0.2s ease, color 0.2s ease, transform 0.2s ease, box-shadow 0.2s ease;
  }

  .btn:focus-visible {
    outline: none;
    box-shadow: 0 0 0 3px rgba(194, 79, 40, 0.24);
  }

  .btn-primary {
    background: var(--brand);
    border-color: var(--brand);
    color: #fff;
    box-shadow: 0 2px 4px rgba(21, 23, 25, 0.08);
  }

  .btn-primary:hover {
    background: var(--brand-deep);
    border-color: var(--brand-deep);
    transform: translateY(-2px);
    box-shadow: 0 10px 24px rgba(194, 79, 40, 0.18);
  }

  .btn-ghost {
    background: transparent;
    border-color: rgba(25, 26, 28, 0.28);
    color: var(--ink);
  }

  .btn-ghost:hover {
    border-color: var(--ink);
    background: rgba(255, 255, 255, 0.4);
    transform: translateY(-1px);
  }

  .btn-white {
    background: #fff;
    border-color: #fff;
    color: var(--ink);
    height: 54px;
    padding: 0 34px;
    font-size: 15px;
    box-shadow: 0 8px 18px rgba(21, 23, 25, 0.16);
  }

  .btn-white:hover {
    background: #f2eeea;
    border-color: #f2eeea;
    transform: translateY(-2px);
  }

  .category-hero {
    background: var(--bg-panel);
    border-bottom: 1px solid rgba(225, 221, 214, 0.72);
    padding: 58px 0 68px;
  }

  @media (min-width: 768px) {
    .category-hero {
      padding: 84px 0 88px;
    }
  }

  .category-hero__title {
    font-size: clamp(40px, 4.8vw, 64px);
    line-height: 1.08;
    font-weight: 750;
    letter-spacing: -0.035em;
    margin-top: 16px;
  }

  .category-hero__lead {
    font-size: 17px;
    line-height: 1.8;
    color: #4F555A;
    max-width: 600px;
    margin-top: 20px;
  }

  .hero-panel-img {
    border-radius: 4px;
    overflow: hidden;
    position: relative;
    box-shadow: 0 20px 46px rgba(21, 23, 25, 0.12);
    background: var(--dark);
  }

  .hero-panel-img::after {
    content: "";
    position: absolute;
    inset: 0;
    background: linear-gradient(120deg, rgba(21, 23, 25, 0.02), rgba(194, 79, 40, 0.08));
    pointer-events: none;
  }

  .hero-tools {
    display: flex;
    flex-wrap: wrap;
    gap: 8px 10px;
    margin-top: 34px;
  }

  .eyebrow-left {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    font-size: 13px;
    color: var(--muted);
    letter-spacing: 0.08em;
  }

  .eyebrow-left .eyebrow-line {
    width: 30px;
    height: 1px;
    background: var(--line);
  }

  .product-map {
    border-top: 1px solid var(--line);
    display: grid;
    grid-template-columns: 1fr;
    margin-top: 38px;
  }

  @media (min-width: 1024px) {
    .product-map {
      grid-template-columns: 1fr 1fr;
    }

    .product-map__item:nth-child(-n+2) {
      border-bottom: 1px solid var(--line);
    }

    .product-map__item:nth-child(odd) {
      border-right: 1px solid var(--line);
    }
  }

  .product-map__item {
    padding: 30px 16px 30px 0;
    border-bottom: 1px solid var(--line);
  }

  @media (max-width: 1023px) {
    .product-map__item:last-child {
      border-bottom: none;
    }
  }

  @media (min-width: 1024px) {
    .product-map__item:nth-child(n+3) {
      padding-top: 32px;
    }
  }

  .product-map__item .map-num {
    font-size: 13px;
    font-weight: 600;
    color: var(--brand);
    letter-spacing: 0.1em;
    margin-bottom: 12px;
    display: block;
  }

  .product-map__item h3 {
    font-size: 20px;
    font-weight: 650;
    line-height: 1.3;
  }

  .product-map__item p {
    margin: 10px 0 0;
    font-size: 15px;
    line-height: 1.8;
    color: var(--muted);
    max-width: 480px;
  }

  .map-link-arrow {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    margin-top: 16px;
    font-size: 14px;
    font-weight: 600;
    color: var(--ink);
    transition: color 0.2s ease;
  }

  .map-link-arrow svg {
    width: 16px;
    height: 16px;
    display: inline-block;
    transition: transform 0.2s ease;
  }

  .map-link-arrow:hover {
    color: var(--brand);
  }

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

  .feature-spot {
    overflow: hidden;
    display: grid;
    grid-template-columns: 1fr;
    background: var(--dark);
    color: #fff;
    border-radius: 6px;
  }

  @media (min-width: 1024px) {
    .feature-spot {
      grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
    }
  }

  .feature-spot__media {
    min-height: 260px;
    height: 100%;
    position: relative;
  }

  .feature-spot__media img {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
  }

  .feature-spot__media::after {
    content: "";
    position: absolute;
    inset: 0;
    background: linear-gradient(90deg, rgba(21, 23, 25, 0.32), rgba(21, 23, 25, 0.05));
    pointer-events: none;
  }

  @media (max-width: 1023px) {
    .feature-spot__media {
      height: 260px;
      min-height: 0;
    }

    .feature-spot__media::after {
      background: linear-gradient(180deg, rgba(21, 23, 25, 0.18), rgba(21, 23, 25, 0.1));
    }
  }

  .feature-spot__content {
    padding: 44px 28px 42px;
    position: relative;
  }

  @media (min-width: 1024px) {
    .feature-spot__content {
      padding: 58px 64px 56px 56px;
    }
  }

  .feature-spot__content .overline {
    font-size: 13px;
    font-weight: 600;
    color: #E6A58B;
    letter-spacing: 0.16em;
  }

  .dark-title {
    color: #fff;
  }

  .feature-spot__content h2 {
    font-size: clamp(27px, 2.3vw, 42px);
    line-height: 1.16;
    margin-top: 14px;
    font-weight: 680;
    letter-spacing: -0.02em;
    color: #fff;
  }

  .feature-spot__content .lead-text {
    color: rgba(255, 255, 255, 0.72);
    font-size: 16px;
    line-height: 1.9;
    margin-top: 18px;
    max-width: 560px;
  }

  .feature-spot__points {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-top: 24px;
  }

  .soft-tag {
    display: inline-flex;
    align-items: center;
    min-height: 30px;
    border: 1px solid rgba(255, 255, 255, 0.18);
    border-radius: 4px;
    padding: 0 12px;
    font-size: 13px;
    background: rgba(255, 255, 255, 0.04);
    color: rgba(255, 255, 255, 0.82);
  }

  .hard-tag {
    display: inline-flex;
    align-items: center;
    min-height: 30px;
    border: 1px solid rgba(194, 79, 40, 0.32);
    border-radius: 999px;
    padding: 0 13px;
    font-size: 13px;
    color: var(--brand);
    background: rgba(194, 79, 40, 0.08);
    font-weight: 500;
  }

  .plain-card {
    border: 1px solid var(--line);
    background: var(--bg-panel);
    border-radius: 6px;
    height: 100%;
    display: flex;
    flex-direction: column;
  }

  .plain-card__content {
    padding: 30px 28px 26px;
  }

  .plain-card__content h3 {
    font-size: 21px;
    line-height: 1.3;
    font-weight: 650;
  }

  .plain-card__content p {
    margin: 12px 0 0;
    color: #545B60;
    font-size: 15px;
    line-height: 1.8;
  }

  .plain-card__media {
    height: 220px;
    overflow: hidden;
    border-radius: 6px 6px 0 0;
  }

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

  .dark-card {
    border-radius: 6px;
    background: var(--dark);
    height: 100%;
    display: flex;
    flex-direction: column;
    overflow: hidden;
  }

  .dark-card__body {
    padding: 30px 32px 30px;
  }

  .dark-card__body .list-title {
    color: #fff;
    font-size: 21px;
    font-weight: 650;
    line-height: 1.3;
    margin-top: 12px;
  }

  .dark-card__body p {
    color: rgba(255, 255, 255, 0.64);
    margin: 12px 0 0;
    font-size: 15px;
    line-height: 1.8;
  }

  .dark-card__list {
    margin-top: 18px;
    padding: 0;
    list-style: none;
    display: grid;
    gap: 4px;
  }

  .dark-card__list li {
    color: rgba(255, 255, 255, 0.78);
    font-size: 14px;
    padding-left: 20px;
    position: relative;
  }

  .dark-card__list li::before {
    content: "";
    position: absolute;
    left: 2px;
    top: 12px;
    width: 7px;
    height: 7px;
    border-radius: 50%;
    background: var(--brand);
  }

  .text-link {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    color: inherit;
    font-size: 14px;
    font-weight: 600;
    margin-top: 22px;
    transition: color 0.2s ease;
  }

  .text-link svg {
    width: 17px;
    transition: transform 0.2s ease;
  }

  .text-link:hover {
    color: var(--brand);
  }

  .text-link:hover svg {
    transform: translateX(5px);
  }

  .text-link--dark {
    color: rgba(255, 255, 255, 0.8);
  }

  .text-link--dark:hover {
    color: #fff;
  }

  .flow-rail {
    list-style: none;
    margin: 44px 0 0;
    padding: 0;
    border-top: 1px solid var(--line);
  }

  .flow-rail li {
    position: relative;
    padding: 28px 0 28px 56px;
    border-bottom: 1px solid var(--line);
    display: grid;
    gap: 6px 28px;
  }

  @media (min-width: 768px) {
    .flow-rail li {
      grid-template-columns: 140px minmax(0, 1fr) minmax(0, 0.9fr);
      align-items: start;
      padding-left: 56px;
    }
  }

  .flow-rail__num {
    position: absolute;
    left: 0;
    top: 28px;
    font-size: 14px;
    font-weight: 650;
    color: var(--brand);
    letter-spacing: 0.06em;
  }

  .flow-rail h3 {
    font-size: 18px;
    line-height: 1.2;
    margin: 0;
  }

  .flow-rail p {
    margin: 0;
    color: var(--muted);
    font-size: 15px;
    line-height: 1.8;
  }

  @media (min-width: 768px) {
    .flow-rail p {
      grid-column: 2 / -1;
      margin-top: 8px;
    }
  }

  .faq-zone {
    display: grid;
    grid-template-columns: 1fr;
    gap: 22px;
  }

  @media (min-width: 1024px) {
    .faq-zone {
      grid-template-columns: 0.72fr 1.28fr;
      gap: 70px;
    }
  }

  .faq-intro h2 {
    font-size: 30px;
  }

  .faq-item {
    border-bottom: 1px solid var(--line);
    padding: 8px 0;
  }

  .faq-item summary {
    list-style: none;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 26px;
    cursor: pointer;
    padding: 17px 0;
    font-weight: 580;
    color: var(--ink);
    transition: color 0.18s ease;
  }

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

  .faq-item summary:hover {
    color: var(--brand);
  }

  .faq-item .faq-icon {
    position: relative;
    flex-shrink: 0;
    width: 22px;
    height: 22px;
  }

  .faq-item .faq-icon::before,
  .faq-item .faq-icon::after {
    content: "";
    position: absolute;
    top: 50%;
    left: 50%;
    width: 14px;
    height: 1.6px;
    background: var(--ink);
    transform: translate(-50%, -50%);
    transition: background 0.2s ease, transform 0.3s ease;
  }

  .faq-item .faq-icon::after {
    transform: translate(-50%, -50%) rotate(90deg);
  }

  .faq-item[open] .faq-icon::after {
    transform: translate(-50%, -50%) rotate(0deg);
  }

  .faq-item[open] .faq-icon::before {
    background: var(--brand);
  }

  .faq-answer {
    display: grid;
    grid-template-rows: 0fr;
    transition: grid-template-rows 0.32s ease;
  }

  .faq-item[open] .faq-answer {
    grid-template-rows: 1fr;
  }

  .faq-answer > div {
    overflow: hidden;
  }

  .faq-answer p {
    margin: 0;
    padding: 0 0 18px;
    color: #565C61;
    font-size: 15px;
    line-height: 1.9;
    max-width: 620px;
  }

  .contact-cta {
    background: var(--dark);
    color: rgba(255, 255, 255, 0.64);
    border-radius: 8px;
  }

  .contact-cta .section-label {
    color: #E6A58B;
  }

  .contact-cta .section-label::before {
    background: #E6A58B;
  }

  .contact-cta h2 {
    color: #fff;
    font-size: clamp(30px, 3vw, 42px);
    line-height: 1.14;
    margin-top: 14px;
  }

  .contact-cta .cta-description {
    color: rgba(255, 255, 255, 0.72);
    max-width: 400px;
    margin: 16px 0 0;
    line-height: 1.8;
  }

  .cta-form {
    background: rgba(255, 255, 255, 0.045);
    border: 1px solid rgba(255, 255, 255, 0.12);
    border-radius: 8px;
    padding: 24px;
    display: grid;
    gap: 14px;
  }

  @media (min-width: 768px) {
    .cta-form {
      padding: 28px;
      grid-template-columns: 1fr 1fr;
    }

    .cta-form .form-group--full {
      grid-column: 1 / -1;
    }
  }

  .cta-form label {
    display: block;
    font-size: 13px;
    font-weight: 500;
    color: rgba(255, 255, 255, 0.68);
    margin-bottom: 6px;
  }

  .cta-form input,
  .cta-form select,
  .cta-form textarea {
    width: 100%;
    min-height: 46px;
    background: rgba(255, 255, 255, 0.06);
    border: 1px solid rgba(255, 255, 255, 0.2);
    color: #fff;
    border-radius: 4px;
    padding: 10px 13px;
    font-size: 14px;
    outline: none;
    transition: border-color 0.2s ease, box-shadow 0.2s ease, background 0.2s ease;
  }

  .cta-form textarea {
    min-height: 104px;
    resize: vertical;
  }

  .cta-form select {
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='14' height='14' viewBox='0 0 24 24' fill='none' stroke='rgba(255,255,255,0.6)' stroke-width='2.4' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='6 9 12 15 18 9'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 14px center;
    padding-right: 42px;
    color: rgba(255, 255, 255, 0.88);
  }

  .cta-form select option {
    color: #fff;
    background: #151719;
  }

  .cta-form input::placeholder,
  .cta-form textarea::placeholder {
    color: rgba(255, 255, 255, 0.38);
  }

  .cta-form input:focus,
  .cta-form select:focus,
  .cta-form textarea:focus {
    border-color: rgba(194, 79, 40, 0.9);
    box-shadow: 0 0 0 3px rgba(194, 79, 40, 0.2);
    background: rgba(255, 255, 255, 0.07);
  }

  .form-success {
    grid-column: 1 / -1;
    background: rgba(83, 167, 110, 0.2);
    border: 1px solid rgba(109, 195, 145, 0.4);
    color: rgba(255, 255, 255, 0.86);
    padding: 14px 16px;
    border-radius: 5px;
    font-size: 14px;
    display: none;
  }

  .form-success.is-visible {
    display: block;
  }

  .site-footer {
    background: var(--dark);
    color: rgba(255, 255, 255, 0.72);
  }

  .site-footer__brand {
    font-size: 24px;
    font-weight: 700;
    color: #fff;
    letter-spacing: 0.02em;
  }

  .footer-link {
    display: inline-block;
    color: rgba(255, 255, 255, 0.64);
    font-size: 14px;
    padding: 7px 0;
    transition: color 0.2s ease;
  }

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

  .footer-bottom {
    font-size: 13px;
    color: rgba(255, 255, 255, 0.48);
  }

  .footer-bottom .container-site {
    border-top: 1px solid var(--dark-line);
  }

  .footer-note {
    font-size: 13px;
  }

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

/* roulang page: category3 */
:root {
            --bg-page: #F5F4F1;
            --bg-panel: #FCFBFA;
            --ink: #191A1C;
            --muted: #6F7477;
            --line: #E1DDD6;
            --brand: #C24F28;
            --brand-deep: #9F3D1B;
            --dark: #151719;
            --dark-line: #2F3336;
            --radius: 6px;
            --shadow-sm: 0 1px 2px rgba(0,0,0,.05);
            --shadow-md: 0 8px 30px rgba(0,0,0,.06);
            --shadow-card: 0 8px 28px rgba(25,26,28,.06);
            --transition: all .25s ease;
            --font-family: ui-sans-serif,system-ui,-apple-system,"PingFang SC","Microsoft YaHei","Noto Sans CJK SC","Source Han Sans SC",sans-serif;
        }
        html { scroll-behavior: smooth; }
        body { font-family: var(--font-family); background: var(--bg-page); color: var(--ink); line-height: 1.75; font-size: 16px; -webkit-font-smoothing: antialiased; }
        * { box-sizing: border-box; }
        .container-site { max-width: 1200px; margin-left: auto; margin-right: auto; padding-left: 20px; padding-right: 20px; }
        @media(min-width:768px){ .container-site { padding-left: 32px; padding-right: 32px; } }
        @media(min-width:1200px){ .container-site { padding-left: 0; padding-right: 0; } }

        /* Header & Nav */
        .site-header { position: sticky; top: 0; z-index: 60; background: rgba(252,251,250,.9); backdrop-filter: blur(12px); border-bottom: 1px solid rgba(225,221,214,.7); transition: box-shadow .25s ease; }
        .site-header.is-scrolled { box-shadow: 0 4px 24px rgba(25,26,28,.06); }
        .header-inner { height: 68px; display: flex; align-items: center; justify-content: space-between; gap: 24px; }
        .brand-logo { display: inline-flex; align-items: center; gap: 10px; font-size: 20px; font-weight: 800; letter-spacing: .02em; color: var(--ink); text-decoration: none; white-space: nowrap; }
        .brand-logo .logo-mark { width: 30px; height: 30px; border-radius: 5px; background: var(--dark); position: relative; display: inline-flex; align-items: center; justify-content: center; }
        .brand-logo .logo-mark::before { content: ""; width: 14px; height: 14px; border: 1.6px solid #C24F28; border-radius: 2px; transform: rotate(45deg); }
        .main-nav { display: none; align-items: center; gap: 6px; }
        .nav-link { position: relative; font-size: 15px; font-weight: 500; color: var(--ink); padding: 10px 14px; text-decoration: none; border-radius: 4px; transition: var(--transition); opacity:.72; }
        .nav-link:hover { opacity: 1; color: var(--ink); background: rgba(25,26,28,.04); }
        .nav-link.is-active { opacity: 1; font-weight: 600; }
        .nav-link.is-active::after { content: ""; position: absolute; left: 14px; right: 14px; bottom: 3px; height: 2px; background: var(--brand); border-radius: 2px; }
        .nav-link:focus-visible { outline: 2px solid var(--brand); outline-offset: 2px; opacity: 1; }
        .header-cta { display: none; }
        .header-mobile-toggle { display: inline-flex; align-items: center; justify-content: center; width: 42px; height: 42px; border-radius: 6px; border: 1px solid var(--line); background: transparent; color: var(--ink); cursor: pointer; font-size: 18px; }
        .mobile-menu-panel { border-top: 1px solid rgba(225,221,214,.7); background: var(--bg-panel); max-height: 0; overflow: hidden; transition: max-height .3s ease; }
        .mobile-menu-panel.open { max-height: 420px; }
        .mobile-menu-panel .mobile-links { padding: 10px 20px 20px; display: flex; flex-direction: column; }
        .mobile-links a { display: block; padding: 14px 4px; font-size: 16px; font-weight: 500; color: var(--ink); text-decoration: none; border-bottom: 1px solid rgba(225,221,214,.55); transition: var(--transition); }
        .mobile-links a:last-child { border-bottom: none; }
        .mobile-links a:hover { color: var(--brand); padding-left: 10px; }
        .mobile-links a.is-active { color: var(--brand); font-weight: 600; }
        @media(min-width: 992px){
            .main-nav { display: inline-flex; }
            .header-cta { display: inline-flex; }
            .header-mobile-toggle { display: none; }
        }

        /* Buttons */
        .btn { display: inline-flex; align-items: center; justify-content: center; gap: 8px; height: 46px; padding: 0 24px; border-radius: 4px; font-size: 15px; font-weight: 600; text-decoration: none; border: 1px solid transparent; cursor: pointer; transition: var(--transition); line-height: 1; white-space: nowrap; }
        .btn:focus-visible { outline: 2px solid var(--brand); outline-offset: 3px; }
        .btn-primary { background: var(--dark); color: #fff; }
        .btn-primary:hover { background: #2b2e32; transform: translateY(-1px); box-shadow: var(--shadow-sm); }
        .btn-brand { background: var(--brand); color: #fff; }
        .btn-brand:hover { background: var(--brand-deep); transform: translateY(-1px); box-shadow: 0 8px 20px rgba(194,79,40,.2); }
        .btn-ghost { background: transparent; color: rgba(255,255,255,.88); border-color: rgba(255,255,255,.3); }
        .btn-ghost:hover { border-color: rgba(255,255,255,.8); color: #fff; background: rgba(255,255,255,.05); }
        .btn-light { background: #fff; color: var(--ink); }
        .btn-light:hover { background: #f0efeb; transform: translateY(-1px); }
        .btn-lg { height: 54px; padding: 0 34px; font-size: 16px; border-radius: 5px; }
        .btn-sm { height: 38px; padding: 0 16px; font-size: 13px; }

        /* Section Blocks */
        .section-padding { padding-top: 76px; padding-bottom: 76px; }
        @media(min-width:768px){ .section-padding { padding-top: 108px; padding-bottom: 108px; } }
        .bg-panel { background: var(--bg-panel); }
        .eyebrow-label { display: inline-flex; align-items: center; gap: 8px; font-size: 13px; font-weight: 700; letter-spacing: .14em; color: var(--brand); text-transform: uppercase; margin-bottom: 16px; }
        .eyebrow-label::before { content: ""; width: 24px; height: 1.6px; background: var(--brand); border-radius: 3px; }
        .section-title { font-size: 28px; line-height: 1.22; font-weight: 700; letter-spacing: -0.01em; margin: 0 0 18px; color: var(--ink); }
        @media(min-width:768px) { .section-title { font-size: 34px; } }
        .section-subtitle { font-size: 16px; line-height: 1.8; color: var(--muted); max-width: 640px; margin: 0 0 40px; }
        .text-muted-small { font-size: 14px; color: var(--muted); line-height: 1.7; }
        .section-head { margin-bottom: 40px; }

        /* Card */
        .card { background: var(--bg-panel); border: .5px solid rgba(225,221,214,.88); border-radius: 6px; padding: 28px; transition: var(--transition); }
        .card:hover { border-color: #cbc6be; box-shadow: var(--shadow-card); transform: translateY(-2px); }
        .card-title { font-size: 18px; font-weight: 700; margin: 18px 0 10px; line-height: 1.3; }
        .card-desc { font-size: 14px; line-height: 1.75; color: var(--muted); margin: 0; }
        .feature-index { font-size: 11px; font-weight: 800; letter-spacing: .12em; color: var(--brand); border: 1px solid rgba(194,79,40,.25); background: rgba(194,79,40,.04); padding: 3px 9px; border-radius: 3px; display: inline-block; }
        .icon-block { width: 46px; height: 46px; border-radius: 8px; background: rgba(25,26,28,.03); display: flex; align-items: center; justify-content: center; font-size: 20px; color: var(--brand); border: .5px solid rgba(194,79,40,.15); }

        /* List Styles */
        .list-check { list-style: none; padding: 0; margin: 0; }
        .list-check li { padding-left: 28px; position: relative; font-size: 15px; line-height: 1.7; color: var(--ink); margin-bottom: 12px; }
        .list-check li::before { content: "\f00c"; font-family: "Font Awesome 6 Free"; font-weight: 900; position: absolute; left: 0; top: 2px; font-size: 13px; color: var(--brand); }

        /* Number Process */
        .process-line-item { position: relative; padding: 0 0 36px; }
        @media(min-width:768px){ .process-line-item { display: grid; grid-template-columns: 1.2fr 2.6fr; gap: 30px; padding: 0 0 50px; } }
        .process-num { font-size: 84px; font-weight: 800; line-height: 1; font-family: ui-monospace, SFMono-Regular, Menlo, monospace; color: rgba(25,26,28,.6); transition: var(--transition); }
        .process-num em { font-style: normal; color: rgba(194,79,40,.42); }
        .process-title { font-size: 20px; font-weight: 700; margin: 6px 0 8px; }
        .process-desc { font-size: 14px; color: var(--muted); max-width: 40em; }
        .process-rule-line { margin: 0 0 34px; height: 1px; background: linear-gradient(to right, var(--line) 0%, var(--line) 70%, transparent 100%); }

        @keyframes fadeUp { from { opacity: 0; transform: translateY(14px);} to { opacity: 1; transform: translateY(0);} }
        .fade-in { opacity: 0; }
        .fade-in.visible { animation: fadeUp .6s ease forwards; }
        @media (prefers-reduced-motion: reduce) {
            html { scroll-behavior: auto; }
            *, *::before, *::after { animation-duration: .01ms !important; transition-duration: .01ms !important; }
            .fade-in { opacity: 1; }
        }

        /* Table */
        .policy-table { width: 100%; border-collapse: separate; border-spacing: 0; font-size: 14px; }
        .policy-table th { text-align: left; padding: 14px 16px; background: rgba(25,26,28,.04); font-weight: 600; border-bottom: 1px solid var(--line); white-space: nowrap; }
        .policy-table td { padding: 14px 16px; border-bottom: 1px solid rgba(225,221,214,.45); vertical-align: top; color: var(--ink); line-height: 1.7; }
        .policy-table tr:last-child td { border-bottom: none; }

        /* FAQ */
        .faq-item { border-bottom: 1px solid rgba(225,221,214,.7); }
        .faq-item:first-child { border-top: 1px solid rgba(225,221,214,.7); }
        .faq-answer { display: none; padding: 0 36px 24px 0; font-size: 14.5px; line-height: 1.75; color: var(--muted); }
        .faq-question { display: flex; align-items: center; justify-content: space-between; padding: 20px 0; cursor: pointer; font-size: 16px; font-weight: 500; color: var(--ink); transition: var(--transition); }
        .faq-question:hover { color: var(--brand); }
        .faq-question .faq-icon { width: 20px; height: 20px; position: relative; flex-shrink: 0; transition: transform .3s; }
        .faq-question .faq-icon::before, .faq-question .faq-icon::after { content:""; position:absolute; background: var(--brand); border-radius: 4px; transition: var(--transition); }
        .faq-question .faq-icon::before { width: 14px; height: 1.8px; top: 9px; left: 3px; }
        .faq-question .faq-icon::after { width: 1.8px; height: 14px; top: 3px; left: 9px; }
        .faq-item.open .faq-icon { transform: rotate(45deg); }
        .faq-item.open .faq-answer { display: block; }

        /* Footer */
        .site-footer { background: var(--dark); color: rgba(255,255,255,.8); }
        .site-footer__brand { font-size: 22px; font-weight: 800; color: #fff; letter-spacing: .01em; }
        .footer-brand { display: inline-flex; align-items: center; gap: 10px; }
        .footer-link { display: block; font-size: 14px; color: rgba(255,255,255,.55); text-decoration: none; padding: 5px 0; transition: var(--transition); }
        .footer-link:hover { color: #fff; padding-left: 4px; }
        .footer-bottom { border-color: var(--dark-line) !important; font-size: 13px; color: rgba(255,255,255,.38); }

        /* Category Hero */
        .cat-hero { background: var(--dark); color: #fff; position: relative; overflow: hidden; padding-top: 76px; padding-bottom: 76px; }
        @media(min-width:768px){ .cat-hero { padding-top: 96px; padding-bottom: 96px; } }
        .cat-hero .bg-img { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; opacity: .2; }
        .cat-hero .hero-content { position: relative; z-index: 2; }
        .cat-hero h1 { font-size: 36px; line-height: 1.18; font-weight: 800; margin: 16px 0 18px; }
        @media(min-width:768px){ .cat-hero h1 { font-size: 48px; } }
        .cat-hero p.lead { color: rgba(255,255,255,.68); font-size: 16px; max-width: 640px; }

        /* Contact form */
        .form-input { width: 100%; height: 48px; background: #fff; border: 1px solid var(--line); border-radius: 4px; padding: 0 15px; font-size: 14px; color: var(--ink); transition: var(--transition); }
        .form-input:focus { outline: none; border-color: var(--brand); box-shadow: 0 0 0 3px rgba(194,79,40,.15); }
        .form-textarea { width: 100%; min-height: 110px; background: #fff; border: 1px solid var(--line); border-radius: 4px; padding: 12px 15px; font-size: 14px; color: var(--ink); }
        .form-textarea:focus { outline: none; border-color: var(--brand); box-shadow: 0 0 0 3px rgba(194,79,40,.15); }
        .form-row { display: grid; grid-template-columns: 1fr; gap: 14px; }
        @media(min-width:768px) { .form-row { grid-template-columns: 1fr 1fr; } }

        /* Tags */
        .tag { display: inline-block; padding: 4px 10px; border-radius: 3px; background: rgba(194,79,40,.08); color: var(--brand); font-size: 12px; font-weight: 600; border: 1px solid rgba(194,79,40,.16); }
        .tag-line { display: inline-flex; align-items: center; gap: 6px; font-size: 13px; color: var(--muted); }

        .image-rounded { border-radius: 6px; overflow: hidden; }

        .text-feature { display: flex; gap: 14px; padding: 18px 0; }
        .text-feature .feature-no { font-size: 12px; font-weight: 800; color: var(--brand); border-bottom: 2px solid var(--brand); padding-bottom: 4px; white-space: nowrap; }
        .text-feature p { margin: 0 0 6px; } .text-feature .title-sm { font-size: 16px; font-weight: 700; }
        .num-lg { font-size: 42px; font-weight: 800; line-height: 1; color: var(--brand); font-family: ui-monospace, monospace; }

        /* Common styles */
        .step-index { font-size: 13px; font-weight: 700; letter-spacing: .04em; color: var(--brand); background: rgba(194,79,40,.10); padding: 4px 14px; border-radius: 3px; border: 1px solid rgba(194,79,40,.10); }
        .editorial-cnt { font-size: 16px; line-height: 1.8; color: var(--ink); }
        .image-wrap { border-radius: 8px; overflow: hidden; background: #edeae4; aspect-ratio: 16/10; }
        .image-wrap img { width: 100%; height: 100%; object-fit: cover; transition: transform .4s ease; }
        .image-wrap:hover img { transform: scale(1.03); }

        /* Scrollbar offset */
        .bg-light-cream { background: #FBFAF8; }
        .text-gradient-dark { color: var(--ink); }
        .link-arrow { color: var(--ink); text-decoration: none; font-size: 14px; font-weight: 600; display: inline-flex; align-items: center; gap: 6px; transition: var(--transition); }
        .link-arrow:hover { color: var(--brand); gap: 10px; }

/* roulang page: category2 */
:root {
    --bg-page: #F5F4F1;
    --bg-panel: #FCFBFA;
    --ink: #191A1C;
    --muted: #6F7477;
    --line: #E1DDD6;
    --brand: #C24F28;
    --brand-deep: #9F3D1B;
    --dark: #151719;
    --dark-line: #2F3336;
    --shadow-card: 0 1px 2px rgba(25, 26, 28, 0.04);
    --shadow-soft: 0 18px 40px rgba(25, 26, 28, 0.08);
  }

  * {
    box-sizing: border-box;
  }

  html {
    scroll-behavior: smooth;
    scroll-padding-top: 88px;
  }

  body {
    margin: 0;
    background: var(--bg-page);
    color: var(--ink);
    font-family: ui-sans-serif, system-ui, -apple-system, "PingFang SC", "Microsoft YaHei", "Noto Sans CJK SC", sans-serif;
    font-size: 16px;
    line-height: 1.75;
    letter-spacing: 0.01em;
    -webkit-font-smoothing: antialiased;
    text-rendering: optimizeLegibility;
  }

  h1, h2, h3, h4, p, figure, blockquote {
    margin: 0;
  }

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

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

  button, input, select, textarea {
    font: inherit;
    color: inherit;
  }

  ul, ol {
    margin: 0;
    padding: 0;
    list-style: none;
  }

  .skip-link {
    position: fixed;
    left: -9999px;
    top: 0;
    z-index: 2000;
    padding: 10px 18px;
    background: var(--ink);
    color: #fff;
    border-radius: 0 0 6px 0;
  }

  .skip-link:focus {
    left: 0;
    color: #fff;
  }

  .container-site {
    width: 100%;
    max-width: 1220px;
    margin-left: auto;
    margin-right: auto;
    padding-left: 20px;
    padding-right: 20px;
  }

  @media (min-width: 768px) {
    .container-site {
      padding-left: 32px;
      padding-right: 32px;
    }
  }

  .section {
    position: relative;
    padding-top: 96px;
    padding-bottom: 96px;
  }

  @media (max-width: 767px) {
    .section {
      padding-top: 72px;
      padding-bottom: 72px;
    }
  }

  .section-heading {
    max-width: 860px;
  }

  .section-heading .section-heading__eyebrow {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 22px;
    font-size: 14px;
    font-weight: 600;
    color: var(--brand);
  }

  .section-heading .section-heading__eyebrow::before {
    content: "";
    display: inline-block;
    width: 34px;
    height: 2px;
    background: var(--brand);
  }

  h1, h2, h3 {
    line-height: 1.2;
    font-weight: 700;
    text-wrap: balance;
  }

  h1 {
    font-size: clamp(40px, 6vw, 68px);
    line-height: 1.05;
    letter-spacing: -0.025em;
  }

  h2 {
    font-size: clamp(30px, 3.6vw, 44px);
    line-height: 1.16;
    letter-spacing: -0.02em;
  }

  h3 {
    font-size: clamp(19px, 1.8vw, 23px);
    line-height: 1.4;
  }

  .text-lead {
    font-size: 17px;
    line-height: 1.8;
    color: var(--muted);
  }

  /* header */
  .site-header {
    z-index: 100;
    height: 64px;
    position: sticky;
    top: 0;
    background: rgba(252, 251, 250, 0.92);
    backdrop-filter: blur(14px);
    -webkit-backdrop-filter: blur(14px);
    border-bottom: 1px solid var(--line);
  }

  .site-header__inner {
    position: relative;
    display: flex;
    align-items: center;
    gap: 16px;
    height: 64px;
  }

  .header-brand {
    display: inline-flex;
    align-items: center;
    flex-shrink: 0;
    font-weight: 800;
    font-size: 21px;
    letter-spacing: 0.02em;
    color: var(--ink);
    line-height: 1;
  }

  .header-brand__mark {
    position: relative;
    display: inline-block;
    width: 26px;
    height: 26px;
    margin-right: 10px;
    border-radius: 4px;
    border: 1px solid var(--brand);
    background: transparent;
  }

  .header-brand__mark i {
    position: absolute;
    display: block;
    background: var(--brand);
  }

  .header-brand__mark i:nth-child(1) {
    width: 11px;
    height: 2px;
    left: 3px;
    top: 7px;
  }

  .header-brand__mark i:nth-child(2) {
    width: 2px;
    height: 13px;
    left: 3px;
    top: 3px;
  }

  .header-brand__mark i:nth-child(3) {
    width: 12px;
    height: 2px;
    left: 5px;
    bottom: 4px;
    background: transparent;
    box-shadow: inset 0 0 0 1px var(--brand);
  }

  .main-nav {
    display: flex;
    align-items: center;
    gap: clamp(20px, 3vw, 40px);
    margin-left: auto;
    margin-right: auto;
  }

  .nav-link {
    position: relative;
    display: inline-flex;
    align-items: center;
    min-height: 64px;
    padding: 0 2px;
    font-size: 15px;
    font-weight: 600;
    color: var(--muted);
    transition: color 0.25s ease;
    white-space: nowrap;
  }

  .nav-link::after {
    content: "";
    position: absolute;
    left: 0;
    right: 0;
    bottom: -1px;
    height: 2px;
    background: var(--brand);
    transform: scaleX(0);
    transform-origin: center;
    transition: transform 0.25s ease;
  }

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

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

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

  .nav-toggle {
    display: none;
    align-items: center;
    justify-content: center;
    flex-direction: column;
    width: 44px;
    height: 44px;
    gap: 5px;
    margin-left: auto;
    padding: 0;
    border: 0;
    background: transparent;
    border-radius: 4px;
    cursor: pointer;
    flex-shrink: 0;
  }

  .nav-toggle span {
    display: block;
    width: 20px;
    height: 2px;
    border-radius: 2px;
    background: var(--ink);
    transition: transform 0.25s ease, opacity 0.25s ease;
  }

  .nav-toggle:hover span {
    background: var(--brand);
  }

  .site-header.is-open .nav-toggle span:nth-child(1) {
    transform: translateY(7px) rotate(45deg);
  }

  .site-header.is-open .nav-toggle span:nth-child(2) {
    opacity: 0;
  }

  .site-header.is-open .nav-toggle span:nth-child(3) {
    transform: translateY(-7px) rotate(-45deg);
  }

  @media (max-width: 1023px) {
    .nav-toggle {
      display: flex;
    }

    .main-nav {
      display: none;
      position: absolute;
      top: 64px;
      left: -32px;
      right: -32px;
      margin: 0;
      background: #fff;
      border-bottom: 1px solid var(--line);
      box-shadow: 0 16px 32px rgba(25, 26, 28, 0.08);
      flex-direction: column;
      align-items: stretch;
      gap: 0;
      padding: 8px 0 14px;
    }

    .site-header.is-open .main-nav {
      display: flex;
    }

    .nav-link {
      min-height: 50px;
      border-bottom: 1px solid #F2EFEA;
      font-size: 16px;
      padding: 0 6px;
    }

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

    .nav-link:focus-visible {
      outline: 2px solid var(--brand);
      outline-offset: -2px;
      border-radius: 4px;
    }
  }

  /* hero */
  .hero-solutions {
    position: relative;
    color: #fff;
    background: var(--dark);
    overflow: hidden;
    isolation: isolate;
  }

  .hero-solutions__bg {
    position: absolute;
    inset: 0;
    z-index: -2;
    background-image: url('/assets/images/backpic/back-2.png');
    background-size: cover;
    background-position: center;
    opacity: 0.22;
  }

  .hero-solutions::after {
    content: "";
    position: absolute;
    inset: 0;
    z-index: -1;
    background: linear-gradient(90deg, rgba(21, 23, 25, 0.96) 0%, rgba(21, 23, 25, 0.78) 62%, rgba(21, 23, 25, 0.6) 100%);
  }

  .hero-solutions__content {
    position: relative;
    z-index: 1;
    padding-top: 88px;
    padding-bottom: 80px;
  }

  @media (min-width: 768px) {
    .hero-solutions__content {
      padding-top: 116px;
      padding-bottom: 108px;
    }
  }

  .hero-solutions__eyebrow {
    display: inline-flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 28px;
    font-size: 14px;
    font-weight: 600;
    color: rgba(255, 255, 255, 0.82);
    letter-spacing: 0.12em;
  }

  .hero-solutions__eyebrow::before {
    content: "";
    display: block;
    width: 30px;
    height: 1px;
    background: var(--brand);
  }

  .hero-solutions h1 {
    color: #fff;
  }

  .hero-solutions__lead {
    max-width: 560px;
    margin-top: 28px;
    font-size: 17px;
    line-height: 1.85;
    color: rgba(255, 255, 255, 0.78);
  }

  .hero-solutions__actions {
    display: flex;
    flex-wrap: wrap;
    gap: 14px;
    margin-top: 38px;
  }

  .hero-figure {
    position: relative;
    border: 1px solid rgba(255, 255, 255, 0.16);
    border-radius: 6px;
    background: rgba(255, 255, 255, 0.04);
    overflow: hidden;
  }

  .hero-figure img,
  .hero-figure .media-box {
    width: 100%;
    aspect-ratio: 4 / 3;
    object-fit: cover;
  }

  .hero-figure .hero-figure__note {
    position: absolute;
    right: 14px;
    bottom: 14px;
    left: 14px;
    background: rgba(21, 23, 25, 0.72);
    border: 1px solid rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(8px);
    color: rgba(255, 255, 255, 0.86);
    font-size: 13px;
    line-height: 1.6;
    padding: 10px 14px;
    border-radius: 4px;
  }

  @media (max-width: 1023px) {
    .hero-solutions__content .hero-figure {
      margin-top: 20px;
    }
  }

  .hero-keyline {
    position: relative;
    z-index: 1;
    border-top: 1px solid rgba(255, 255, 255, 0.12);
    background: rgba(255, 255, 255, 0.02);
  }

  .hero-keyline__inner {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 18px;
    padding-top: 22px;
    padding-bottom: 22px;
  }

  @media (min-width: 768px) {
    .hero-keyline__inner {
      grid-template-columns: repeat(4, 1fr);
      gap: 24px;
    }
  }

  .hero-keyline__item {
    display: flex;
    align-items: center;
    gap: 10px;
    color: rgba(255, 255, 255, 0.8);
    font-size: 14px;
    letter-spacing: 0.04em;
    white-space: nowrap;
  }

  .hero-keyline__item span {
    color: var(--brand);
    font-size: 13px;
    line-height: 1;
  }

  /* buttons */
  .btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    min-height: 46px;
    padding: 0 24px;
    border-radius: 4px;
    font-weight: 600;
    font-size: 15px;
    line-height: 1;
    border: 1px solid transparent;
    cursor: pointer;
    transition: background 0.25s ease, border-color 0.25s ease, color 0.25s ease, transform 0.25s ease, box-shadow 0.25s ease;
  }

  .btn:focus-visible {
    outline: 3px solid rgba(194, 79, 40, 0.28);
    outline-offset: 3px;
  }

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

  .btn-primary:hover {
    background: var(--brand-deep);
    transform: translateY(-1px);
    box-shadow: 0 8px 22px rgba(159, 61, 27, 0.2);
  }

  .btn-outline-white {
    background: transparent;
    border-color: rgba(255, 255, 255, 0.32);
    color: #fff;
  }

  .btn-outline-white:hover {
    border-color: #fff;
    background: rgba(255, 255, 255, 0.08);
    transform: translateY(-1px);
  }

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

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

  .btn-dark {
    background: var(--ink);
    color: #fff;
  }

  .btn-dark:hover {
    background: #222429;
    transform: translateY(-1px);
  }

  .btn-lg {
    min-height: 54px;
    padding: 0 30px;
    font-size: 16px;
  }

  .btn-sm {
    min-height: 40px;
    padding: 0 16px;
  }

  /* section scene */
  .scene-section {
    background: var(--bg-page);
  }

  .scene-section .section-heading {
    margin-bottom: 48px;
  }

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

  .scene-row {
    display: grid;
    grid-template-columns: 1fr;
    gap: 20px;
    border-bottom: 1px solid var(--line);
    padding: 30px 0;
  }

  @media (min-width: 1024px) {
    .scene-row {
      grid-template-columns: 78px minmax(0, 1.05fr) minmax(0, 1fr) auto;
      align-items: start;
      gap: 34px;
      padding: 34px 0;
    }
  }

  .scene-row__index {
    font-size: 30px;
    line-height: 1;
    font-weight: 700;
    letter-spacing: -0.03em;
    color: var(--brand);
  }

  .scene-row h3 {
    font-weight: 700;
    font-size: 21px;
    line-height: 1.35;
  }

  .scene-row h3 span {
    display: block;
    color: var(--muted);
    font-size: 14px;
    font-weight: 500;
    margin: 8px 0 0;
  }

  .scene-row .field-label {
    display: block;
    margin-bottom: 10px;
    font-size: 13px;
    font-weight: 600;
    color: var(--muted);
    letter-spacing: 0.03em;
  }

  .scene-row p {
    color: var(--ink);
    font-size: 15px;
    line-height: 1.75;
  }

  .link-arrow {
    display: inline-flex;
    align-items: center;
    width: fit-content;
    gap: 6px;
    color: var(--brand);
    font-weight: 700;
    font-size: 15px;
    white-space: nowrap;
    padding: 4px 0;
  }

  .link-arrow span {
    transition: transform 0.25s ease;
  }

  .link-arrow:hover span {
    transform: translateX(5px);
  }

  .link-arrow:focus-visible {
    outline: 2px solid var(--brand);
    outline-offset: 6px;
    border-radius: 2px;
  }

  .scene-aside {
    background: var(--bg-panel);
    border: 1px solid var(--line);
    border-radius: 6px;
    box-shadow: var(--shadow-card);
    overflow: hidden;
  }

  .scene-aside__media {
    aspect-ratio: 4 / 3;
    overflow: hidden;
    background: var(--line);
  }

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

  .scene-aside__body {
    padding: 26px;
  }

  .scene-aside__body h3 {
    font-size: 19px;
  }

  .scene-aside__body p {
    margin-top: 14px;
    color: var(--muted);
    font-size: 15px;
    line-height: 1.8;
  }

  /* guide grid */
  .guide-section {
    background: var(--bg-panel);
    border-top: 1px solid var(--line);
    border-bottom: 1px solid var(--line);
  }

  .guide-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 0;
    margin-top: 52px;
    border-top: 1px solid var(--line);
    border-left: 1px solid var(--line);
    background: var(--line);
  }

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

  .guide-card {
    background: var(--bg-panel);
    padding: 40px 36px;
    border-right: 1px solid var(--line);
    border-bottom: 1px solid var(--line);
    min-height: 255px;
  }

  .guide-card__index {
    font-size: 14px;
    font-weight: 800;
    letter-spacing: 0.06em;
    color: var(--brand);
  }

  .guide-card h3 {
    margin-top: 16px;
    font-size: 20px;
  }

  .guide-card p {
    margin-top: 14px;
    max-width: 420px;
    color: var(--muted);
    font-size: 15px;
    line-height: 1.8;
  }

  /* FAQ */
  .faq-wrap {
    display: grid;
    grid-template-columns: 1fr;
    gap: 36px;
  }

  @media (min-width: 1024px) {
    .faq-wrap {
      grid-template-columns: minmax(0, 0.85fr) minmax(0, 1.6fr);
      gap: 60px;
    }
  }

  .faq-wrap .section-heading {
    position: sticky;
    top: 110px;
    align-self: start;
  }

  @media (max-width: 1023px) {
    .faq-wrap .section-heading {
      position: static;
    }
  }

  .faq-list {
    display: flex;
    flex-direction: column;
    gap: 16px;
  }

  .faq-item {
    background: var(--bg-panel);
    border: 1px solid var(--line);
    border-radius: 8px;
    overflow: hidden;
  }

  .faq-item summary {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 24px;
    padding: 22px 24px;
    list-style: none;
    cursor: pointer;
    color: var(--ink);
    font-weight: 700;
    font-size: 17px;
    line-height: 1.5;
    transition: background 0.25s ease, color 0.25s ease;
  }

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

  .faq-item summary:hover {
    background: #FBF6F2;
  }

  .faq-item summary:focus-visible {
    outline: 2px solid var(--brand);
    outline-offset: -2px;
    border-radius: 8px;
  }

  .faq-item__icon {
    position: relative;
    flex-shrink: 0;
    width: 18px;
    height: 18px;
    border: 1px solid var(--brand);
    border-radius: 3px;
    transition: transform 0.25s ease;
  }

  .faq-item__icon::before,
  .faq-item__icon::after {
    content: "";
    position: absolute;
    top: 50%;
    left: 50%;
    width: 10px;
    height: 1.5px;
    background: var(--brand);
    transform: translate(-50%, -50%);
    transition: transform 0.25s ease;
  }

  .faq-item__icon::after {
    transform: translate(-50%, -50%) rotate(90deg);
  }

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

  .faq-item p {
    padding: 2px 24px 24px;
    color: var(--muted);
    font-size: 15px;
    line-height: 1.85;
  }

  /* contact CTA */
  .contact-cta {
    background: var(--dark);
    color: #fff;
    overflow: hidden;
  }

  .contact-cta__card {
    background: var(--bg-panel);
    color: var(--ink);
    border-radius: 6px;
    padding: 28px;
    box-shadow: var(--shadow-soft);
  }

  @media (min-width: 768px) {
    .contact-cta__card {
      padding: 42px;
    }
  }

  .form-field {
    margin-bottom: 20px;
  }

  .form-field label {
    display: block;
    margin-bottom: 8px;
    font-size: 14px;
    font-weight: 600;
    color: var(--ink);
  }

  .form-field label em {
    color: var(--brand);
    font-style: normal;
    margin-left: 2px;
  }

  .form-input {
    width: 100%;
    min-height: 48px;
    padding: 0 14px;
    border: 1px solid var(--line);
    border-radius: 4px;
    background: #fff;
    font-size: 15px;
    color: var(--ink);
    transition: border-color 0.2s ease, box-shadow 0.2s ease;
  }

  textarea.form-input {
    min-height: 128px;
    padding-top: 14px;
    padding-bottom: 14px;
    resize: vertical;
    line-height: 1.7;
  }

  select.form-input {
    appearance: auto;
  }

  .form-input::placeholder {
    color: #A6AAA9;
  }

  .form-input:focus {
    outline: none;
    border-color: var(--brand);
    box-shadow: 0 0 0 3px rgba(194, 79, 40, 0.14);
  }

  .form-feedback {
    margin: 18px 0 0;
    color: var(--brand-deep);
    font-size: 14px;
    font-weight: 600;
    min-height: 0;
  }

  /* footer */
  .site-footer {
    background: var(--dark);
    color: #fff;
  }

  .site-footer__brand {
    color: #fff;
    font-size: 24px;
    font-weight: 800;
    letter-spacing: 0.02em;
  }

  .footer-link {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    color: rgba(255, 255, 255, 0.62);
    font-size: 15px;
    line-height: 1.4;
    padding: 8px 0;
    transition: color 0.22s ease, transform 0.22s ease;
  }

  .footer-link:hover {
    color: #fff;
    transform: translateX(2px);
  }

  .footer-link:focus-visible {
    outline: 2px solid var(--brand);
    outline-offset: 4px;
    border-radius: 2px;
  }

  .border-coalline {
    border-color: var(--dark-line);
  }

  @media (max-width: 767px) {
    h1 {
      letter-spacing: -0.02em;
    }

    .section-heading .section-heading__eyebrow {
      margin-bottom: 16px;
    }

    .hero-solutions__actions .btn {
      width: 100%;
    }

    .guide-card {
      padding: 30px 24px;
      min-height: auto;
    }

    .contact-cta__card {
      padding: 24px 20px;
    }
  }

  @media (min-width: 1024px) {
    .main-nav {
      margin-left: auto;
      margin-right: auto;
    }
  }

  .js .reveal {
    opacity: 0;
    transform: translateY(14px);
    transition: opacity 0.5s ease, transform 0.5s ease;
  }

  .js .reveal.is-visible {
    opacity: 1;
    transform: translateY(0);
  }

  @media (prefers-reduced-motion: reduce) {
    html {
      scroll-behavior: auto;
    }

    *,
    *::before,
    *::after {
      animation-duration: 0.01ms !important;
      animation-iteration-count: 1 !important;
      transition-duration: 0.01ms !important;
    }

    .js .reveal {
      opacity: 1;
      transform: none;
      transition: none;
    }
  }

/* roulang page: category4 */
:root{
    --bg-page:#F5F4F1;
    --bg-panel:#FCFBFA;
    --ink:#191A1C;
    --muted:#6F7477;
    --line:#E1DDD6;
    --brand:#C24F28;
    --brand-deep:#9F3D1B;
    --dark:#151719;
    --dark-line:#2F3336;
    --radius-btn:4px;
    --radius-card:6px;
    --shadow-card:0 1px 2px rgba(21,23,25,.04),0 8px 30px rgba(21,23,25,.06);
  }
  *{box-sizing:border-box;padding:0;margin:0}
  html{scroll-behavior:smooth}
  body{
    background:var(--bg-page);
    color:var(--ink);
    font-family:ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei","Noto Sans CJK SC","Source Han Sans SC",sans-serif;
    font-size:16px;
    line-height:1.75;
    -webkit-font-smoothing:antialiased;
    text-rendering:optimizeLegibility;
  }
  body.no-scroll{overflow:hidden}
  img{max-width:100%;height:auto;display:block}
  a{color:inherit;text-decoration:none;transition:color .25s ease,border-color .25s ease,background-color .25s ease,transform .25s ease}
  button{font:inherit;border:0;background:none;cursor:pointer}
  input,select,textarea{font:inherit;color:inherit}
  :focus-visible{outline:3px solid rgba(194,79,40,.45);outline-offset:2px;border-radius:4px}
  .sr-only{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap}
  .container-site{max-width:1200px;margin-inline:auto;padding-inline:20px;width:100%}
  @media(min-width:768px){.container-site{padding-inline:32px}}
  @media(min-width:1200px){.container-site{padding-inline:48px}}

  /* 页面容器与正文层级 */
  .section{padding-block:72px}
  @media(min-width:768px){.section{padding-block:104px}}
  .section--compact{padding-block:56px}
  @media(min-width:768px){.section--compact{padding-block:72px}}
  .section-title{font-size:30px;line-height:1.15;font-weight:700;letter-spacing:-.01em}
  .section-lead{color:var(--muted);font-size:16px;line-height:1.75;max-width:520px}
  .eyebrow{display:inline-flex;align-items:center;gap:8px;font-size:13px;font-weight:600;letter-spacing:.08em;color:var(--brand);text-transform:uppercase}
  .eyebrow::before{content:"";width:24px;height:2px;background:currentColor;display:inline-block}

  /* Header */
  .site-header{
    position:sticky;top:0;z-index:60;
    background:rgba(252,251,250,.92);
    backdrop-filter:blur(14px);
    -webkit-backdrop-filter:blur(14px);
    border-bottom:1px solid var(--line);
    transition:box-shadow .3s ease;
  }
  .site-header.is-scrolled{box-shadow:0 4px 20px rgba(21,23,25,.05)}
  .header-inner{height:64px;display:flex;align-items:center;gap:28px;justify-content:space-between}
  .brand-logo{display:inline-flex;align-items:center;gap:10px;flex-shrink:0}
  .brand-logo__symbol{
    width:34px;height:34px;border-radius:6px;background:var(--dark);
    color:#fff;display:flex;align-items:center;justify-content:center;
    font-size:14px;font-weight:800;font-style:normal;letter-spacing:-.03em;
  }
  .brand-logo__text{font-size:20px;font-weight:800;letter-spacing:-.02em;color:var(--ink);white-space:nowrap}
  .main-nav{display:flex;align-items:center;gap:4px;margin-left:auto}
  .main-nav .nav-link{
    position:relative;padding:8px 16px;font-size:15px;font-weight:500;color:#4e5154;
    border-radius:4px;transition:color .25s ease;
    white-space:nowrap;
  }
  .main-nav .nav-link:hover{color:var(--ink)}
  .main-nav .nav-link.is-active{color:var(--ink)}
  .main-nav .nav-link.is-active::after{
    content:"";position:absolute;left:16px;right:16px;bottom:2px;height:2px;
    background:var(--brand);border-radius:2px;
  }
  .header-cta{margin-left:8px}
  .btn{
    display:inline-flex;align-items:center;justify-content:center;gap:8px;
    min-height:44px;padding:10px 24px;border-radius:var(--radius-btn);
    font-size:15px;font-weight:600;line-height:1.2;
    transition:all .25s ease;border:1px solid transparent;white-space:nowrap;
  }
  .btn-sm{min-height:38px;padding:6px 16px;font-size:14px}
  .btn-lg{min-height:52px;padding:14px 32px;font-size:16px}
  .btn-primary{background:var(--brand);color:#fff;box-shadow:0 2px 8px rgba(194,79,40,.12)}
  .btn-primary:hover{background:var(--brand-deep);transform:translateY(-1px);box-shadow:0 8px 22px rgba(194,79,40,.2)}
  .btn-primary:active{transform:translateY(0)}
  .btn-outline{border-color:#dfe2e4;background:#fff;color:var(--ink)}
  .btn-outline:hover{border-color:#9ba1a4;transform:translateY(-1px)}
  .btn-light{border-color:#52585b;color:#fff;background:rgba(255,255,255,.03)}
  .btn-light:hover{border-color:#c7cccf;color:#fff;transform:translateY(-1px)}
  .text-link{display:inline-flex;align-items:center;gap:6px;color:var(--ink);font-weight:600;font-size:15px;transition:color .25s ease}
  .text-link:hover{color:var(--brand)}
  .text-link .arrow{transition:transform .25s ease}
  .text-link:hover .arrow{transform:translateX(4px)}

  /* Nav toggle */
  .nav-toggle{
    display:none;width:42px;height:42px;border-radius:4px;align-items:center;justify-content:center;
    flex-direction:column;gap:6px;background:transparent;
  }
  .nav-toggle span{display:block;width:19px;height:2px;background:var(--ink);border-radius:2px;transition:transform .3s ease,opacity .3s ease}
  .nav-toggle.is-open span:nth-child(1){transform:translateY(4px) rotate(45deg)}
  .nav-toggle.is-open span:nth-child(2){transform:translateY(-4px) rotate(-45deg)}
  @media(max-width:1023px){
    .header-inner{flex-wrap:wrap;height:auto;min-height:64px}
    .nav-toggle{display:inline-flex}
    .main-nav{
      display:none;width:100%;flex-direction:column;align-items:stretch;
      gap:0;padding:8px 0 16px;border-top:1px solid var(--line);margin-left:0;
    }
    .main-nav.is-open{display:flex}
    .main-nav .nav-link{padding:14px 8px;font-size:16px}
    .main-nav .nav-link.is-active::after{left:8px;right:auto;width:20px;bottom:6px}
    .header-cta{margin-left:auto}
  }
  @media(max-width:480px){
    .brand-logo__text{font-size:18px}
    .header-cta .btn{padding:6px 12px;font-size:13px}
  }

  /* Hero */
  .page-hero{
    background:var(--dark);color:#fff;position:relative;overflow:hidden;
    padding:88px 0 72px;
  }
  @media(min-width:768px){.page-hero{padding:116px 0 96px}}
  .page-hero__bg{position:absolute;inset:0;background-image:url("/assets/images/backpic/back-2.png");background-size:cover;background-position:center;opacity:.2}
  .page-hero__bg::after{content:"";position:absolute;inset:0;background:linear-gradient(90deg,var(--dark) 0%,rgba(21,23,25,.55) 100%)}
  .page-hero__grid{position:relative;z-index:2;display:grid;grid-template-columns:minmax(0,1fr);gap:48px;align-items:center}
  @media(min-width:1024px){.page-hero__grid{grid-template-columns:minmax(0,1.12fr) minmax(0,.88fr)}}
  .page-hero .breadcrumb{display:flex;flex-wrap:wrap;align-items:center;gap:6px;font-size:13px;color:#9aa0a5;margin-bottom:24px}
  .page-hero .breadcrumb a{color:#cfd4d7}
  .page-hero .breadcrumb a:hover{color:#fff}
  .page-hero .breadcrumb span{color:#6f7578}
  .page-hero__title{font-size:42px;line-height:1.08;font-weight:800;letter-spacing:-.02em;margin-top:18px}
  @media(min-width:768px){.page-hero__title{font-size:56px}}
  @media(min-width:1200px){.page-hero__title{font-size:68px}}
  .page-hero__lead{font-size:17px;line-height:1.8;color:#b9bec2;max-width:600px;margin-top:24px}
  .page-hero__actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:36px}
  .page-hero__meta{display:flex;flex-wrap:wrap;gap:10px;margin-top:28px;border-top:1px solid var(--dark-line);padding-top:24px}
  .hero-chip{font-size:13px;color:#9aa0a5;padding:6px 12px;border:1px solid #2d3336;border-radius:999px}
  .hero-media{position:relative;border-radius:8px;overflow:hidden;box-shadow:0 30px 80px rgba(0,0,0,.4)}
  .hero-media img{width:100%;aspect-ratio:4/3;object-fit:cover}
  .hero-media__caption{
    position:absolute;left:16px;right:16px;bottom:16px;background:rgba(21,23,25,.72);
    backdrop-filter:blur(8px);border:1px solid rgba(255,255,255,.1);border-radius:6px;
    padding:12px 16px;
  }
  .hero-media__caption strong{display:block;font-size:15px;color:#fff;font-weight:600}
  .hero-media__caption span{display:block;font-size:13px;color:#b9bec2;margin-top:2px}

  /* Intro strip */
  .intro-strip{border-block:1px solid var(--line);background:var(--bg-panel)}
  .intro-strip__inner{display:grid;grid-template-columns:repeat(2,1fr)}
  @media(min-width:768px){.intro-strip__inner{grid-template-columns:repeat(4,1fr)}}
  .intro-strip__item{padding:26px 20px;text-align:center;border-right:1px solid var(--line);font-size:14px;font-weight:600;color:#3b3e40}
  .intro-strip__item:last-child{border-right:0}
  .intro-strip__item small{display:block;font-size:13px;color:var(--muted);font-weight:400;margin-top:6px}
  @media(max-width:767px){
    .intro-strip__item:nth-child(2){border-right:0}
    .intro-strip__item:nth-child(-n+2){border-bottom:1px solid var(--line)}
  }

  /* Service modules */
  .service-module{display:grid;grid-template-columns:minmax(0,1fr);gap:20px 40px;padding:32px 0;border-top:1px solid var(--line)}
  .service-module:last-child{border-bottom:1px solid var(--line)}
  @media(min-width:768px){.service-module{grid-template-columns:minmax(0,.9fr) minmax(0,1.6fr);gap:48px;padding:40px 0}}
  .service-module__meta{display:flex;align-items:flex-start;gap:16px}
  .service-module__index{font-size:46px;line-height:1;font-weight:800;color:var(--brand);font-feature-settings:"tnum";opacity:.9;min-width:64px;letter-spacing:-.03em}
  .service-module__title{font-size:24px;font-weight:700;line-height:1.3;margin-bottom:8px}
  @media(min-width:768px){.service-module__meta{flex-direction:column;gap:12px}.service-module__index{font-size:44px}}
  .service-module__desc{color:#3a3d3f;font-size:16px;line-height:1.85}
  .service-module__desc p{margin-bottom:14px;max-width:620px}
  .service-module__desc p:last-child{margin-bottom:0}
  .service-tag{display:inline-flex;align-items:center;font-size:13px;font-weight:500;color:var(--brand);background:rgba(194,79,40,.07);border:1px solid rgba(194,79,40,.16);padding:5px 12px;border-radius:999px;margin:12px 16px 0 0}
  @media(min-width:768px){.service-tag{margin-top:16px}}

  /* Workspace scene */
  .workspace-section{background:var(--bg-panel)}
  .scene-card{
    display:grid;grid-template-columns:minmax(0,1fr);gap:0;background:#fff;
    border:1px solid var(--line);border-radius:8px;overflow:hidden;
    box-shadow:var(--shadow-card);
  }
  @media(min-width:1024px){.scene-card{grid-template-columns:minmax(0,1.05fr) minmax(0,.95fr)}}
  .scene-card__media{position:relative;min-height:260px}
  .scene-card__media img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover}
  .scene-card__body{padding:34px}
  @media(min-width:1024px){.scene-card__body{padding:56px}}
  .scene-item{padding:18px 0;border-bottom:1px solid var(--line);display:flex;gap:16px}
  .scene-item:first-of-type{padding-top:0}
  .scene-item:last-child{border-bottom:0;padding-bottom:0}
  .scene-item__no{font-size:13px;font-weight:700;color:var(--brand);line-height:1.6;width:20px}
  .scene-item h3{font-size:17px;font-weight:700;margin-bottom:4px}
  .scene-item p{font-size:15px;color:var(--muted);line-height:1.7}

  /* Timeline / Process */
  .process-section{background:#eceae6}
  .process-grid{display:grid;grid-template-columns:1fr;gap:24px;margin-top:44px}
  @media(min-width:768px){.process-grid{grid-template-columns:repeat(2,1fr)}}
  @media(min-width:1024px){.process-grid{grid-template-columns:repeat(4,1fr)}}
  .process-node{
    position:relative;border:1px solid var(--line);background:#fff;border-radius:8px;
    padding:28px 24px;min-height:200px;transition:all .3s ease;
  }
  .process-node:hover{transform:translateY(-4px);border-color:#c4c0ba;box-shadow:var(--shadow-card)}
  .process-node__num{font-size:13px;font-weight:600;color:#9ba0a3;display:block;letter-spacing:.04em}
  .process-node h3{font-size:20px;font-weight:700;margin-top:14px}
  .process-node p{font-size:14px;color:var(--muted);line-height:1.7;margin-top:10px}
  .process-node__line{
    position:absolute;left:24px;top:118px;bottom:-24px;width:1px;background:var(--line)
  }
  .process-node:last-child .process-node__line{display:none}
  @media(min-width:1024px){
    .process-node__line{display:none}
    .process-node::after{
      content:"";position:absolute;top:84px;right:-25px;width:48px;height:1px;background:var(--line);
    }
    .process-node:last-child::after{display:none}
  }

  /* FAQ */
  .faq-wrap{
    border-top:1px solid var(--line);
  }
  details.faq-item{
    border-bottom:1px solid var(--line);
    background:transparent;
    transition:background-color .25s ease;
  }
  details.faq-item[open]{background:rgba(252,251,250,.6)}
  .faq-item summary{
    list-style:none;
    display:flex;align-items:center;gap:16px;justify-content:space-between;
    padding:22px 4px;cursor:pointer;user-select:none;font-size:17px;font-weight:600;
  }
  .faq-item summary::-webkit-details-marker{display:none}
  .faq-item__plus{
    position:relative;flex:0 0 auto;width:32px;height:32px;border-radius:50%;
    border:1px solid var(--line);background:#fff;transition:all .35s ease;
  }
  .faq-item__plus::before,.faq-item__plus::after{
    content:"";position:absolute;top:50%;left:50%;transform:translate(-50%,-50%);width:12px;height:2px;background:var(--brand);border-radius:1px;transition:transform .3s ease;
  }
  .faq-item__plus::after{transform:translate(-50%,-50%) rotate(90deg)}
  details[open] .faq-item__plus::after{transform:translate(-50%,-50%) rotate(0deg)}
  details[open] .faq-item__plus{background:var(--brand);border-color:var(--brand)}
  details[open] .faq-item__plus::before{background:#fff}
  details[open] .faq-item__plus::after{background:#fff}
  .faq-item__body{padding:2px 4px 26px;max-width:760px;color:var(--muted);font-size:15px;line-height:1.8}

  /* Contact / form section */
  .contact-section{background:var(--dark);color:#f6f7f7;position:relative;overflow:hidden}
  .contact-section::before{
    content:"";position:absolute;inset:0;background:
      linear-gradient(rgba(255,255,255,.02) 1px,transparent 1px),
      linear-gradient(90deg,rgba(255,255,255,.02) 1px,transparent 1px);
    background-size:56px 56px;
  }
  .contact-card{position:relative;z-index:2;display:grid;grid-template-columns:1fr;gap:40px}
  @media(min-width:1024px){.contact-card{grid-template-columns:minmax(0,.9fr) minmax(0,1.1fr);gap:64px}}
  .contact-section h2{color:#fff;font-size:32px;line-height:1.2;font-weight:700}
  @media(min-width:768px){.contact-section h2{font-size:40px}}
  .contact-section .section-lead{color:#9aa0a3;margin-top:16px}
  .contact-points{margin-top:28px}
  .contact-points li{display:flex;gap:12px;align-items:flex-start;padding:10px 0;color:#c9ced0;font-size:15px;list-style:none}
  .contact-points li::before{content:"✓";color:var(--brand);font-weight:700}
  .support-form{
    background:#fff;border-radius:8px;padding:24px;border:1px solid rgba(255,255,255,.08);
    box-shadow:0 20px 60px rgba(0,0,0,.3);
  }
  @media(min-width:768px){.support-form{padding:34px}}
  .support-form label{font-size:14px;font-weight:600;color:var(--ink);display:block;margin-bottom:8px}
  .support-form input,.support-form textarea{
    width:100%;background:#fff;border:1px solid var(--line);border-radius:var(--radius-btn);
    font-size:15px;color:var(--ink);padding:0 14px;height:48px;margin-bottom:18px;
    transition:border-color .2s ease,box-shadow .2s ease;
    outline:none;
  }
  .support-form textarea{height:auto;min-height:132px;padding:12px 14px;line-height:1.6;resize:vertical}
  .support-form input:focus,.support-form textarea:focus{
    border-color:var(--brand);box-shadow:0 0 0 3px rgba(194,79,40,.12);
  }
  .support-form input::placeholder,.support-form textarea::placeholder{color:#a9aeb1}
  .support-form .btn{width:100%}
  .contact-note{font-size:13px;color:#7c8386;margin-top:14px}

  /* Footer */
  .site-footer{
    background:#111315;color:#d9dddf;
  }
  .site-footer .footer-brand{
    font-size:24px;font-weight:800;color:#fff;letter-spacing:-.01em;
  }
  .footer-link{display:inline-block;color:#9a9fa3;font-size:14px;padding:6px 0;transition:color .25s ease}
  .footer-link:hover{color:#fff}
  .footer-bottom{border-color:#34393c!important}

  /* Reveal */
  .reveal{opacity:0;transform:translateY(12px);transition:opacity .5s cubic-bezier(.2,.6,.2,1),transform .5s cubic-bezier(.2,.6,.2,1)}
  .reveal.is-visible{opacity:1;transform:none}
  .skip-link{
    position:fixed;top:-100px;left:16px;z-index:100;background:var(--dark);color:#fff;
    padding:8px 16px;border-radius:4px;font-size:14px;transition:top .2s ease;
  }
  .skip-link:focus{top:16px}
  @media(prefers-reduced-motion:reduce){
    html{scroll-behavior:auto}
    *,*::before,*::after{animation-duration:.01ms!important;transition-duration:.01ms!important;scroll-behavior:auto!important}
    .reveal{opacity:1;transform:none}
  }