/* roulang page: index */
:root {
  --primary: #1B7BA4;
  --primary-dark: #166184;
  --accent: #E47A35;
  --bg: #F3F7FA;
  --white: #FFFFFF;
  --text: #1F2E3A;
  --muted: #5A6E7D;
  --border: #E1E9EF;
  --success: #2B8C8C;
  --footer-bg: #0F2B3A;
  --radius: 12px;
  --radius-sm: 8px;
  --shadow: 0 2px 10px rgba(15, 43, 58, .06);
  --shadow-lg: 0 12px 28px rgba(15, 43, 58, .12);
  --transition: .2s ease;
  --space-section: 64px;
  --container: 1200px;
}

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

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: "PingFang SC", "Microsoft YaHei", "Hiragino Sans GB", "Helvetica Neue", Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
  font-size: 16px;
  line-height: 1.8;
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3, h4, h5, p, figure, blockquote {
  margin: 0;
}

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

a {
  color: inherit;
  text-decoration: none;
  transition: color var(--transition);
}

img {
  max-width: 100%;
  display: block;
  border: 0;
}

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

input, textarea {
  font-family: inherit;
}

.container {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 20px;
}

.section {
  padding: var(--space-section) 0;
}

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

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

.section-primary-tint {
  background: rgba(27, 123, 164, .08);
}

.section-head {
  margin-bottom: 36px;
}

.section-head h2 {
  font-size: 1.75rem;
  font-weight: 800;
  color: var(--text);
  line-height: 1.4;
  margin-bottom: 8px;
}

.section-head p {
  color: var(--muted);
  max-width: 680px;
  font-size: .9375rem;
}

/* topbar */
.topbar {
  background: var(--footer-bg);
  color: #C9DAE4;
  font-size: .8125rem;
}

.topbar-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 34px;
}

.topbar-brand {
  color: #EAF2F7;
  letter-spacing: .05em;
  font-weight: 600;
}

.topbar-actions {
  display: flex;
  gap: 8px;
  align-items: center;
}

.topbar-action {
  width: 26px;
  height: 26px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  color: #C9DAE4;
  transition: var(--transition);
  font-size: .8125rem;
}

.topbar-action:hover {
  background: rgba(255, 255, 255, .14);
  color: #fff;
}

/* header */
.site-header {
  background: var(--white);
  border-bottom: 1px solid var(--border);
  position: relative;
  z-index: 100;
  transition: box-shadow var(--transition);
}

.site-header.is-sticky {
  position: sticky;
  top: 0;
  box-shadow: var(--shadow);
}

.nav-wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 72px;
  gap: 16px;
}

.main-nav {
  display: flex;
  flex: 1;
  gap: 28px;
  align-items: center;
}

.main-nav-left {
  justify-content: flex-start;
}

.main-nav-right {
  justify-content: flex-end;
}

.brand-logo {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  flex-shrink: 0;
  font-size: 1.25rem;
  font-weight: 800;
  color: var(--text);
  letter-spacing: .02em;
}

.logo-mark {
  width: 36px;
  height: 36px;
  border-radius: 10px;
  background: var(--primary);
  color: #fff;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.logo-mark svg {
  width: 20px;
  height: 20px;
  fill: currentColor;
}

.logo-text {
  white-space: nowrap;
}

.nav-link {
  color: var(--muted);
  font-weight: 600;
  font-size: .9375rem;
  padding: 8px 2px;
  position: relative;
  transition: color var(--transition);
}

.nav-link::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 2px;
  height: 3px;
  border-radius: 3px;
  background: var(--accent);
  opacity: 0;
  transform: scaleX(.4);
  transition: var(--transition);
}

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

.nav-link:hover::after {
  opacity: 1;
  transform: scaleX(.6);
}

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

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

.nav-toggle {
  display: none;
  width: 42px;
  height: 42px;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  font-size: 1.125rem;
  color: var(--text);
  align-items: center;
  justify-content: center;
  transition: var(--transition);
}

.nav-toggle:hover {
  border-color: var(--primary);
  color: var(--primary);
}

.mobile-menu {
  display: none;
  background: var(--white);
  border-top: 1px solid var(--border);
  padding: 8px 20px 14px;
}

.mobile-menu.show {
  display: flex;
  flex-direction: column;
}

.mobile-menu .nav-link {
  display: block;
  padding: 12px 0;
  border-bottom: 1px solid #F0F4F7;
  font-size: 1rem;
}

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

/* hero */
.hero {
  position: relative;
  background-size: cover;
  background-position: center;
  min-height: 520px;
  display: flex;
  align-items: center;
  padding: 72px 0;
  color: #fff;
}

.hero-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(110deg, rgba(15, 43, 58, .78), rgba(27, 123, 164, .62));
}

.hero-content {
  position: relative;
  z-index: 2;
  max-width: 740px;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(255, 255, 255, .14);
  border: 1px solid rgba(255, 255, 255, .26);
  padding: 6px 14px;
  border-radius: 99px;
  font-size: .8125rem;
  letter-spacing: .04em;
  color: #F5F9FC;
}

.hero h1 {
  font-size: clamp(2rem, 3vw, 2.75rem);
  font-weight: 800;
  line-height: 1.3;
  color: #fff;
  margin: 18px 0 14px;
}

.hero-sub {
  font-size: 1.0625rem;
  line-height: 1.8;
  color: rgba(255, 255, 255, .92);
  max-width: 640px;
  margin-bottom: 32px;
}

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

/* buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 28px;
  border-radius: var(--radius-sm);
  font-weight: 700;
  font-size: .9375rem;
  line-height: 1;
  border: 1px solid transparent;
  transition: var(--transition);
  white-space: nowrap;
}

.btn-orange {
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
}

.btn-orange:hover {
  background: #d2692a;
  border-color: #d2692a;
  transform: translateY(-2px);
  box-shadow: 0 8px 18px rgba(228, 122, 53, .28);
}

.btn-orange:active {
  transform: translateY(0);
}

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

.btn-outline:hover {
  background: rgba(27, 123, 164, .08);
  transform: translateY(-2px);
  box-shadow: 0 8px 18px rgba(15, 43, 58, .12);
}

.btn-outline:active {
  transform: translateY(0);
}

.btn:focus-visible {
  outline: 3px solid rgba(228, 122, 53, .4);
  outline-offset: 2px;
}

/* collection */
.collection-grid {
  display: grid;
  grid-template-columns: 1.25fr 1fr;
  gap: 24px;
}

.collection-card {
  position: relative;
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow);
  transition: var(--transition);
  display: flex;
  flex-direction: column;
}

.collection-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
  border-color: var(--primary);
}

.collection-card img {
  width: 100%;
  object-fit: cover;
}

.collection-card-large img {
  height: 240px;
}

.collection-card-small img {
  height: 128px;
}

.collection-card-large {
  grid-row: span 2;
}

.collection-card-body {
  padding: 24px;
  display: flex;
  flex-direction: column;
  flex: 1;
}

.collection-card-body .text-link {
  margin-top: 12px;
}

.collection-card h3 {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--text);
  margin: 12px 0 8px;
}

.collection-card-small h3 {
  font-size: 1.0625rem;
}

.collection-card p {
  color: var(--muted);
  font-size: .9375rem;
  flex: 1;
}

.text-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  color: var(--primary);
  font-weight: 600;
  font-size: .875rem;
  transition: gap var(--transition), color var(--transition);
}

.text-link:hover {
  color: var(--primary-dark);
  gap: 10px;
}

/* badges */
.badge {
  display: inline-flex;
  align-items: center;
  padding: 4px 10px;
  border-radius: var(--radius-sm);
  font-size: .75rem;
  font-weight: 600;
  line-height: 1.4;
  white-space: nowrap;
}

.badge-info {
  background: #E6F2F9;
  color: var(--primary);
}

.time-label {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: #EEF2F5;
  color: var(--muted);
  font-size: .8125rem;
  padding: 4px 10px;
  border-radius: var(--radius-sm);
}

/* featured */
.featured-list {
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  overflow: hidden;
}

.featured-item {
  display: grid;
  grid-template-columns: 280px 1fr;
  gap: 24px;
  padding: 20px;
  border-bottom: 1px solid var(--border);
  transition: background var(--transition);
}

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

.featured-item:hover {
  background: #F8FBFD;
}

.featured-thumb {
  width: 100%;
  height: 160px;
  object-fit: cover;
  border-radius: var(--radius-sm);
  background: #E7EEF3;
}

.featured-content {
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.featured-meta {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
}

.featured-content h3 {
  font-size: 1.125rem;
  font-weight: 700;
  margin: 10px 0 8px;
  line-height: 1.5;
}

.featured-content h3 a {
  transition: color var(--transition);
}

.featured-content h3 a:hover {
  color: var(--primary);
}

.featured-content p {
  color: var(--muted);
  font-size: .9375rem;
  margin-bottom: 12px;
  max-width: 800px;
}

/* latest */
.latest-panel {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.latest-item {
  display: flex;
  gap: 20px;
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px 24px;
  box-shadow: var(--shadow);
  transition: var(--transition);
  align-items: flex-start;
}

.latest-item:hover {
  border-color: var(--primary);
  box-shadow: var(--shadow-lg);
  transform: translateY(-2px);
}

.latest-icon {
  width: 48px;
  height: 48px;
  border-radius: 10px;
  background: #E6F2F9;
  color: var(--primary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.125rem;
  flex-shrink: 0;
}

.latest-content {
  flex: 1;
}

.latest-meta {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
  margin-bottom: 8px;
}

.latest-content h3 {
  font-size: 1.0625rem;
  font-weight: 700;
  line-height: 1.5;
  margin-bottom: 6px;
}

.latest-content h3 a {
  transition: color var(--transition);
}

.latest-content h3 a:hover {
  color: var(--primary);
}

.latest-content p {
  color: var(--muted);
  font-size: .9375rem;
  margin-bottom: 10px;
}

.empty-state {
  background: var(--white);
  border: 1px dashed var(--border);
  border-radius: var(--radius);
  padding: 48px 24px;
  text-align: center;
  color: var(--muted);
  box-shadow: var(--shadow);
}

/* related */
.related-grid {
  display: grid;
  grid-template-columns: repeat(12, 1fr);
  gap: 24px;
}

.related-card {
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow);
  transition: var(--transition);
  grid-column: span 3;
}

.related-card:first-child {
  grid-column: span 6;
}

.related-card:first-child img {
  height: 190px;
}

.related-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
  border-color: var(--primary);
}

.related-card img {
  width: 100%;
  height: 150px;
  object-fit: cover;
}

.related-card-body {
  padding: 20px;
}

.related-card h3 {
  font-size: 1.0625rem;
  font-weight: 700;
  margin: 12px 0 6px;
}

.related-card p {
  font-size: .875rem;
  color: var(--muted);
}

/* cta */
.cta-box {
  background: rgba(27, 123, 164, .08);
  border: 1px solid rgba(27, 123, 164, .18);
  border-radius: var(--radius);
  padding: 44px 48px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 28px;
  flex-wrap: wrap;
}

.cta-text h2 {
  font-size: 1.375rem;
  font-weight: 800;
  color: var(--text);
  margin-bottom: 8px;
}

.cta-text p {
  color: var(--muted);
  max-width: 520px;
  font-size: .9375rem;
}

.cta-actions {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
}

/* faq */
.faq-container {
  max-width: 860px;
}

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

.faq-item {
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  overflow: hidden;
  transition: border-color var(--transition);
}

.faq-item.open {
  border-color: rgba(228, 122, 53, .5);
}

.faq-question {
  width: 100%;
  padding: 18px 22px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  font-size: 1rem;
  font-weight: 600;
  color: var(--text);
  text-align: left;
  transition: background var(--transition);
}

.faq-question:hover {
  background: #F8FBFD;
}

.faq-icon {
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background: #E6F2F9;
  color: var(--primary);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  transition: transform var(--transition), background var(--transition), color var(--transition);
}

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

.faq-answer {
  display: none;
  color: var(--muted);
  font-size: .9375rem;
  line-height: 1.8;
}

.faq-item.open .faq-answer {
  display: block;
  border-left: 3px solid var(--accent);
  margin: 0 22px 18px 22px;
  padding-left: 16px;
}

/* footer */
.site-footer {
  background: var(--footer-bg);
  color: #B9CBD6;
  padding: 56px 0 0;
  margin-top: 24px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.6fr 1fr 1fr 1.2fr;
  gap: 36px;
}

.footer-logo {
  font-size: 1.25rem;
  font-weight: 800;
  color: #fff;
  margin-bottom: 12px;
}

.footer-brand p {
  font-size: .875rem;
  line-height: 1.7;
  max-width: 260px;
  color: #9FB4C0;
}

.footer-col h4 {
  color: #fff;
  font-size: .9375rem;
  font-weight: 700;
  margin-bottom: 14px;
}

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

.footer-col ul a {
  color: #B9CBD6;
  font-size: .875rem;
  transition: color var(--transition);
}

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

.footer-col p {
  font-size: .8125rem;
  color: #8FA7B4;
  line-height: 1.7;
}

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

.footer-copy {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 18px 20px;
  font-size: .8125rem;
  color: #8FA7B4;
  flex-wrap: wrap;
  max-width: var(--container);
  margin: 0 auto;
}

/* toast */
.toast {
  position: fixed;
  bottom: 24px;
  left: 50%;
  transform: translateX(-50%) translateY(20px);
  background: var(--footer-bg);
  color: #fff;
  padding: 12px 20px;
  border-radius: var(--radius-sm);
  font-size: .875rem;
  box-shadow: var(--shadow-lg);
  opacity: 0;
  visibility: hidden;
  transition: var(--transition);
  z-index: 999;
  max-width: calc(100vw - 40px);
}

.toast.show {
  opacity: 1;
  visibility: visible;
  transform: translateX(-50%) translateY(0);
}

/* responsive */
@media (max-width: 1024px) {
  .footer-grid {
    grid-template-columns: 1fr 1fr;
  }

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

  .collection-card-large {
    grid-row: span 2;
  }

  .related-card {
    grid-column: span 6;
  }

  .related-card:first-child {
    grid-column: span 12;
  }
}

@media (max-width: 768px) {
  .section {
    padding: 40px 0;
  }

  .section-head h2 {
    font-size: 1.5rem;
  }

  .nav-toggle {
    display: inline-flex;
  }

  .main-nav {
    display: none;
  }

  .brand-logo .logo-text {
    font-size: 1.0625rem;
  }

  .hero {
    min-height: 440px;
    padding: 48px 0;
  }

  .hero h1 {
    font-size: 1.875rem;
  }

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

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

  .collection-card-large {
    grid-row: auto;
  }

  .collection-card-large img {
    height: 200px;
  }

  .collection-card-small img {
    height: 150px;
  }

  .featured-item {
    grid-template-columns: 1fr;
  }

  .featured-thumb {
    height: 180px;
  }

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

  .related-card,
  .related-card:first-child {
    grid-column: span 1;
  }

  .cta-box {
    padding: 32px 24px;
    flex-direction: column;
    align-items: flex-start;
  }

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

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

  .faq-question {
    font-size: .9375rem;
  }
}

@media (max-width: 520px) {
  .topbar-inner {
    font-size: .75rem;
  }

  .brand-logo {
    font-size: 1rem;
  }

  .logo-mark {
    width: 30px;
    height: 30px;
    border-radius: 8px;
  }

  .logo-mark svg {
    width: 17px;
    height: 17px;
  }

  .btn {
    padding: 10px 20px;
    font-size: .875rem;
  }

  .collection-card-body,
  .featured-item {
    padding: 16px;
  }

  .latest-item {
    padding: 16px;
    flex-direction: column;
  }

  .latest-icon {
    width: 42px;
    height: 42px;
    font-size: 1rem;
  }

  .faq-question {
    padding: 16px;
  }

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

  .hero-sub {
    font-size: 1rem;
  }

  .section-head p {
    font-size: .875rem;
  }
}

/* roulang page: category1 */
:root{
  --primary:#1B7BA4;
  --primary-dark:#166184;
  --primary-deep:#0E4A66;
  --primary-light:#E6F2F9;
  --accent:#E47A35;
  --accent-dark:#C96A2A;
  --bg:#F3F7FA;
  --card:#FFFFFF;
  --text:#1F2E3A;
  --text-secondary:#5A6E7D;
  --border:#E1E9EF;
  --success:#2B8C8C;
  --footer-bg:#0F2B3A;
  --radius:12px;
  --radius-sm:8px;
  --shadow:0 2px 10px rgba(15,43,58,.06);
  --shadow-hover:0 8px 24px rgba(15,43,58,.12);
  --transition:all .25s ease;
  --container:1200px;
}
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{
  font-family:'PingFang SC','Microsoft YaHei','Hiragino Sans GB','Helvetica Neue',Arial,sans-serif;
  font-size:1rem;
  line-height:1.8;
  color:var(--text);
  background:var(--bg);
  -webkit-font-smoothing:antialiased;
}
a{color:inherit;text-decoration:none}
a:focus-visible{outline:3px solid rgba(27,123,164,.45);outline-offset:2px;border-radius:4px}
img{max-width:100%;display:block}
button,input{font-family:inherit}
ul,ol{list-style:none}
.container{max-width:var(--container);margin:0 auto;padding-left:20px;padding-right:20px}

/* ===== Header ===== */
.site-header{position:relative;z-index:100}
.topbar{
  background:var(--primary);
  color:#fff;
  font-size:.8125rem;
}
.topbar-inner{
  display:flex;
  align-items:center;
  justify-content:space-between;
  min-height:34px;
}
.topbar-label{opacity:.92;letter-spacing:.02em}
.topbar-actions{display:flex;gap:6px}
.topbar-actions a{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  width:28px;
  height:28px;
  border-radius:6px;
  color:#fff;
  opacity:.85;
  transition:var(--transition);
}
.topbar-actions a:hover{opacity:1;background:rgba(255,255,255,.16)}
.main-header{
  position:relative;
  display:flex;
  align-items:stretch;
  justify-content:space-between;
  background:var(--card);
  border-bottom:1px solid var(--border);
  min-height:76px;
  transition:var(--transition);
}
.site-header.sticky .main-header{
  position:fixed;top:0;left:0;right:0;
  background:rgba(255,255,255,.97);
  box-shadow:var(--shadow);
  backdrop-filter:blur(8px);
  border-bottom-color:transparent;
}
.site-header.sticky .topbar{display:none}
.logo{
  display:flex;
  align-items:center;
  gap:10px;
  font-size:1.45rem;
  font-weight:800;
  color:var(--text);
  letter-spacing:.01em;
  padding:0 20px;
  white-space:nowrap;
}
.logo-icon{
  width:38px;height:38px;
  border-radius:10px;
  background:var(--primary);
  color:#fff;
  display:inline-flex;
  align-items:center;
  justify-content:center;
  font-size:1.1rem;
  flex-shrink:0;
}
.main-nav{
  display:flex;
  align-items:center;
  gap:4px;
}
.main-nav-left{padding-left:8px}
.main-nav-right{padding-right:8px}
.nav-link{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  padding:8px 16px;
  font-size:.9375rem;
  font-weight:500;
  color:var(--text-secondary);
  border-radius:var(--radius-sm);
  position:relative;
  transition:var(--transition);
  line-height:1.4;
}
.nav-link::after{
  content:'';
  position:absolute;
  bottom:0;
  left:50%;
  transform:translateX(-50%);
  width:0;
  height:3px;
  border-radius:3px 3px 0 0;
  background:var(--accent);
  transition:var(--transition);
}
.nav-link:hover{color:var(--primary)}
.nav-link:hover::after{width:56%}
.nav-link.active{color:var(--primary);font-weight:600}
.nav-link.active::after{width:56%}
.nav-toggle{
  display:none;
  width:44px;height:44px;
  border:1px solid var(--border);
  border-radius:var(--radius-sm);
  background:var(--card);
  color:var(--text);
  font-size:1.15rem;
  cursor:pointer;
  align-items:center;
  justify-content:center;
  position:absolute;
  right:20px;
  top:50%;
  transform:translateY(-50%);
  transition:var(--transition);
}
.nav-toggle:hover{border-color:var(--primary);color:var(--primary)}

/* ===== Buttons ===== */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  padding:12px 28px;
  border-radius:var(--radius-sm);
  font-size:.9375rem;
  font-weight:600;
  border:1px solid transparent;
  cursor:pointer;
  transition:var(--transition);
  white-space:nowrap;
  line-height:1.5;
}
.btn-primary{background:var(--primary);color:#fff}
.btn-primary:hover{background:var(--primary-dark);box-shadow:0 6px 16px rgba(27,123,164,.3);transform:translateY(-1px)}
.btn-primary:active{transform:translateY(0)}
.btn-accent{background:var(--accent);color:#fff}
.btn-accent:hover{background:var(--accent-dark);box-shadow:0 6px 16px rgba(228,122,53,.3);transform:translateY(-1px)}
.btn-accent:active{transform:translateY(0)}
.btn-outline{background:var(--card);border-color:var(--primary);color:var(--primary)}
.btn-outline:hover{background:rgba(27,123,164,.05);border-color:var(--primary-dark);color:var(--primary-dark)}
.btn-outline:active{transform:translateY(0)}
.btn-outline.active{background:var(--primary-light);border-color:var(--primary);color:var(--primary);font-weight:600}

/* ===== Page Hero ===== */
.page-hero{
  position:relative;
  background:linear-gradient(rgba(15,43,58,.58),rgba(27,123,164,.38)),url('/assets/images/backpic/back-1.webp') center/cover no-repeat;
  padding:64px 0 56px;
  color:#fff;
}
.page-hero .container{position:relative;z-index:1}
.breadcrumb{
  display:flex;
  align-items:center;
  gap:6px;
  font-size:.8125rem;
  color:rgba(255,255,255,.75);
  margin-bottom:22px;
}
.breadcrumb a{
  color:rgba(255,255,255,.85);
  transition:var(--transition);
}
.breadcrumb a:hover{color:#fff;text-decoration:underline}
.breadcrumb-sep{opacity:.6;font-size:.75rem}
.page-hero h1{
  font-size:clamp(2rem,3.2vw,2.75rem);
  font-weight:800;
  line-height:1.3;
  margin-bottom:16px;
  letter-spacing:.01em;
}
.hero-subtitle{
  max-width:640px;
  font-size:1.0625rem;
  line-height:1.8;
  color:rgba(255,255,255,.92);
  margin-bottom:28px;
}
.hero-actions{display:flex;gap:14px;flex-wrap:wrap}
.hero-badge{
  display:inline-flex;
  align-items:center;
  gap:6px;
  margin-top:26px;
  padding:6px 14px;
  background:rgba(228,122,53,.92);
  color:#fff;
  font-size:.8125rem;
  font-weight:500;
  border-radius:999px;
}

/* ===== Section Common ===== */
.section-head{
  margin-bottom:36px;
}
.section-head h2{
  font-size:1.75rem;
  font-weight:800;
  color:var(--text);
  line-height:1.35;
  position:relative;
  padding-left:16px;
}
.section-head h2::before{
  content:'';
  position:absolute;
  left:0;
  top:.3em;
  bottom:.3em;
  width:4px;
  border-radius:4px;
  background:var(--accent);
}
.section-head p{
  margin-top:10px;
  color:var(--text-secondary);
  font-size:.9375rem;
  max-width:640px;
  padding-left:16px;
}

/* ===== Entry Section ===== */
.entry-section{
  padding:64px 0;
}
.entry-layout{
  display:grid;
  grid-template-columns:minmax(0,1fr) 320px;
  gap:32px;
  align-items:start;
}
.intro-card{
  background:var(--card);
  border:1px solid var(--border);
  border-radius:var(--radius);
  box-shadow:var(--shadow);
  padding:28px 32px;
  margin-bottom:24px;
}
.intro-card p{
  color:var(--text);
  font-size:1rem;
  line-height:1.85;
}
.intro-card::first-letter{
  color:var(--primary);
  font-weight:700;
}
.entry-list{
  display:flex;
  flex-direction:column;
  gap:16px;
}
.entry-item{
  display:flex;
  align-items:center;
  gap:20px;
  background:var(--card);
  border:1px solid var(--border);
  border-radius:var(--radius);
  box-shadow:var(--shadow);
  padding:22px 24px;
  transition:var(--transition);
  position:relative;
}
.entry-item:hover{
  transform:translateY(-2px);
  box-shadow:var(--shadow-hover);
  border-color:var(--primary);
}
.entry-item:hover .entry-arrow{
  background:var(--primary);
  color:#fff;
}
.entry-icon{
  width:52px;height:52px;
  flex-shrink:0;
  border-radius:12px;
  background:var(--primary-light);
  color:var(--primary);
  display:flex;
  align-items:center;
  justify-content:center;
  font-size:1.25rem;
  transition:var(--transition);
}
.entry-item:hover .entry-icon{
  background:var(--primary);
  color:#fff;
}
.entry-body{flex:1;min-width:0}
.entry-title-row{
  display:flex;
  align-items:center;
  gap:10px;
  flex-wrap:wrap;
  margin-bottom:4px;
}
.entry-body h3{
  font-size:1.0625rem;
  font-weight:700;
  color:var(--text);
}
.entry-body p{
  color:var(--text-secondary);
  font-size:.875rem;
  line-height:1.6;
  margin-top:4px;
}
.entry-arrow{
  width:38px;height:38px;
  flex-shrink:0;
  border-radius:50%;
  background:var(--bg);
  color:var(--text-secondary);
  display:flex;
  align-items:center;
  justify-content:center;
  font-size:.875rem;
  transition:var(--transition);
}

/* ===== Badge ===== */
.badge{
  display:inline-flex;
  align-items:center;
  gap:4px;
  padding:3px 10px;
  border-radius:999px;
  font-size:.75rem;
  font-weight:500;
  line-height:1.4;
  background:#EEF2F5;
  color:var(--text-secondary);
}
.badge-primary{
  background:var(--primary-light);
  color:var(--primary);
}
.badge-accent{
  background:rgba(228,122,53,.12);
  color:var(--accent-dark);
}

/* ===== Sidebar ===== */
.entry-sidebar{display:flex;flex-direction:column;gap:20px;position:sticky;top:100px}
.side-card{
  background:var(--card);
  border:1px solid var(--border);
  border-radius:var(--radius);
  box-shadow:var(--shadow);
  padding:24px;
}
.side-card h3{
  font-size:1rem;
  font-weight:700;
  color:var(--text);
  margin-bottom:16px;
  padding-bottom:10px;
  border-bottom:2px solid var(--primary-light);
}
.side-card p{
  font-size:.875rem;
  color:var(--text-secondary);
  line-height:1.7;
}
.side-links li{
  margin-bottom:10px;
}
.side-links a{
  display:flex;
  align-items:center;
  gap:10px;
  padding:9px 12px;
  border-radius:var(--radius-sm);
  font-size:.875rem;
  color:var(--text);
  background:var(--bg);
  transition:var(--transition);
}
.side-links a i{
  color:var(--primary);
  font-size:.75rem;
  transition:var(--transition);
}
.side-links a:hover{
  background:var(--primary-light);
  color:var(--primary-dark);
  transform:translateX(3px);
}
.side-card-accent{
  border-top:4px solid var(--accent);
}
.side-card-accent h3{color:var(--accent-dark)}
.side-card-accent p{color:var(--text)}
.side-card-accent p i{color:var(--accent);margin-right:6px}

/* ===== FAQ ===== */
.faq-section{
  padding:64px 0;
  background:linear-gradient(180deg,var(--bg) 0%,#EAF1F5 100%);
}
.faq-list{
  max-width:840px;
}
.faq-item{
  background:var(--card);
  border:1px solid var(--border);
  border-radius:var(--radius);
  box-shadow:var(--shadow);
  margin-bottom:14px;
  overflow:hidden;
  transition:var(--transition);
}
.faq-item:hover{
  border-color:var(--primary);
  box-shadow:var(--shadow-hover);
}
.faq-item summary{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:16px;
  padding:18px 22px;
  font-size:.9375rem;
  font-weight:500;
  color:var(--text);
  cursor:pointer;
  list-style:none;
  transition:var(--transition);
}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary i{
  color:var(--text-secondary);
  font-size:.875rem;
  transition:var(--transition);
  flex-shrink:0;
}
.faq-item[open] summary{
  color:var(--primary);
  font-weight:700;
}
.faq-item[open] summary i{
  transform:rotate(45deg);
  color:var(--accent);
}
.faq-answer{
  padding:0 22px 20px;
  border-left:3px solid var(--accent);
  margin-left:22px;
}
.faq-answer p{
  color:var(--text-secondary);
  font-size:.875rem;
  line-height:1.8;
}

/* ===== CTA ===== */
.cta-section{
  padding:64px 0;
}
.cta-box{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:28px;
  background:rgba(27,123,164,.08);
  border:1px solid rgba(27,123,164,.14);
  border-radius:var(--radius);
  padding:40px 44px;
  flex-wrap:wrap;
}
.cta-text h2{
  font-size:1.5rem;
  font-weight:800;
  color:var(--text);
  line-height:1.4;
}
.cta-text p{
  margin-top:8px;
  color:var(--text-secondary);
  font-size:.9375rem;
}
.cta-actions{
  display:flex;
  gap:12px;
  flex-wrap:wrap;
}
.cta-actions .btn-outline{
  border-color:var(--primary);
  color:var(--primary);
}
.cta-actions .btn-outline:hover{
  background:rgba(27,123,164,.08);
}

/* ===== Back Link ===== */
.back-link-section{
  padding:0 0 64px;
  text-align:center;
}
.back-link{
  display:inline-flex;
  align-items:center;
  gap:8px;
  color:var(--text-secondary);
  font-size:.875rem;
  transition:var(--transition);
}
.back-link:hover{
  color:var(--primary);
  transform:translateX(-4px);
}
.back-link i{font-size:.8rem}

/* ===== Footer ===== */
.site-footer{
  background:var(--footer-bg);
  color:rgba(255,255,255,.72);
  font-size:.875rem;
  line-height:1.7;
  padding-top:56px;
}
.footer-grid{
  display:grid;
  grid-template-columns:1.4fr 1fr 1fr 1.1fr;
  gap:40px;
  padding-bottom:36px;
}
.footer-logo{
  font-size:1.25rem;
  font-weight:800;
  color:#fff;
  margin-bottom:10px;
  display:flex;
  align-items:center;
  gap:8px;
}
.footer-logo i{
  color:var(--primary);
}
.footer-brand p{
  color:rgba(255,255,255,.6);
  max-width:280px;
}
.footer-col h4{
  font-size:.9375rem;
  font-weight:700;
  color:#fff;
  margin-bottom:14px;
}
.footer-col ul li{
  margin-bottom:8px;
}
.footer-col ul a{
  color:rgba(255,255,255,.65);
  transition:var(--transition);
}
.footer-col ul a:hover{
  color:#fff;
  padding-left:4px;
}
.footer-col p{
  color:rgba(255,255,255,.55);
  margin-bottom:6px;
}
.footer-bottom{
  border-top:1px solid rgba(255,255,255,.1);
  padding:18px 0;
}
.footer-bottom .footer-copy{
  display:flex;
  justify-content:space-between;
  align-items:center;
  gap:12px;
  font-size:.8125rem;
  color:rgba(255,255,255,.5);
}
.footer-bottom .footer-copy span:last-child{
  color:rgba(255,255,255,.7);
}

/* ===== Responsive ===== */
@media(max-width:1024px){
  .entry-layout{
    grid-template-columns:1fr;
  }
  .entry-sidebar{
    position:static;
    display:grid;
    grid-template-columns:repeat(3,1fr);
    gap:16px;
  }
  .footer-grid{
    grid-template-columns:1fr 1fr;
    gap:32px;
  }
}
@media(max-width:768px){
  .main-header{
    min-height:64px;
    flex-wrap:nowrap;
  }
  .main-nav-left,.main-nav-right{
    display:none;
    position:absolute;
    top:100%;
    left:0;
    right:0;
    flex-direction:column;
    align-items:stretch;
    background:var(--card);
    border-bottom:1px solid var(--border);
    box-shadow:var(--shadow);
    padding:10px 14px;
    gap:6px;
    border-radius:0 0 12px 12px;
  }
  .main-nav-left{right:auto;width:50%}
  .main-nav-left.open,.main-nav-right.open{
    display:flex;
  }
  .nav-link{
    padding:12px 14px;
    justify-content:flex-start;
    border-radius:var(--radius-sm);
  }
  .nav-link::after{display:none}
  .nav-link.active{
    background:var(--primary-light);
    color:var(--primary-dark);
  }
  .nav-toggle{
    display:flex;
  }
  .logo{
    font-size:1.15rem;
    padding:0 12px;
  }
  .logo-icon{
    width:32px;height:32px;
    font-size:.95rem;
  }
  .page-hero{
    padding:48px 0 44px;
  }
  .page-hero h1{
    font-size:1.75rem;
  }
  .hero-actions{
    flex-direction:column;
    align-items:stretch;
  }
  .hero-actions .btn{
    width:100%;
  }
  .entry-section,.faq-section,.cta-section{
    padding:44px 0;
  }
  .section-head h2{
    font-size:1.5rem;
  }
  .entry-item{
    flex-direction:column;
    align-items:flex-start;
    gap:12px;
    padding:20px;
  }
  .entry-arrow{
    position:absolute;
    right:16px;
    top:16px;
    width:32px;height:32px;
    font-size:.75rem;
  }
  .entry-title-row{
    padding-right:36px;
  }
  .cta-box{
    padding:28px 22px;
  }
  .cta-actions{
    width:100%;
  }
  .cta-actions .btn{
    flex:1;
  }
  .footer-grid{
    grid-template-columns:1fr;
    gap:26px;
    padding-bottom:26px;
  }
  .footer-bottom .footer-copy{
    flex-direction:column;
    align-items:flex-start;
    gap:6px;
  }
  .entry-sidebar{
    grid-template-columns:1fr;
  }
  .faq-item summary{
    padding:16px 16px;
  }
  .faq-answer{
    padding:0 16px 16px;
    margin-left:16px;
  }
}
@media(max-width:520px){
  .container{
    padding-left:16px;
    padding-right:16px;
  }
  .page-hero{
    padding:38px 0 36px;
  }
  .page-hero h1{
    font-size:1.5rem;
  }
  .hero-subtitle{
    font-size:.9375rem;
  }
  .btn{
    padding:10px 18px;
    font-size:.875rem;
  }
  .section-head h2{
    font-size:1.3rem;
  }
  .intro-card{
    padding:20px;
  }
  .cta-actions{
    flex-direction:column;
  }
  .cta-actions .btn{
    width:100%;
  }
  .topbar-label{
    font-size:.75rem;
  }
  .entry-sidebar{
    gap:14px;
  }
}

/* roulang page: article */
:root {
  --primary: #1B7BA4;
  --primary-dark: #166184;
  --primary-light: #E6F2F9;
  --accent: #E47A35;
  --accent-dark: #C9642A;
  --bg: #F3F7FA;
  --card: #FFFFFF;
  --text: #1F2E3A;
  --text-secondary: #5A6E7D;
  --border: #E1E9EF;
  --success: #2B8C8C;
  --footer-bg: #0F2B3A;
  --radius: 12px;
  --radius-sm: 8px;
  --shadow: 0 2px 10px rgba(15,43,58,.06);
  --shadow-hover: 0 6px 24px rgba(15,43,58,.12);
  --transition: all .25s ease;
}
* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", "Hiragino Sans GB", "Segoe UI", Roboto, sans-serif;
  font-size: 1rem;
  line-height: 1.8;
  color: var(--text);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
ul, ol { list-style: none; }
button { font-family: inherit; cursor: pointer; border: none; background: none; }
.container { max-width: 1200px; margin: 0 auto; padding: 0 20px; }

/* Header */
.site-header {
  background: var(--card);
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 100;
  box-shadow: 0 1px 4px rgba(15,43,58,.04);
}
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
  position: relative;
}
.main-nav { display: flex; align-items: center; gap: 28px; }
.nav-link {
  font-size: .9375rem;
  font-weight: 500;
  color: var(--text-secondary);
  padding: 8px 4px;
  position: relative;
  transition: var(--transition);
  letter-spacing: .01em;
}
.nav-link:hover { color: var(--primary); }
.nav-link.active { color: var(--primary); }
.nav-link.active::after {
  content: '';
  position: absolute;
  left: 50%;
  bottom: 0;
  transform: translateX(-50%);
  width: 24px;
  height: 3px;
  border-radius: 3px;
  background: var(--accent);
}
.site-logo { position: absolute; left: 50%; transform: translateX(-50%); }
.logo-link { display: flex; align-items: center; gap: 10px; }
.logo-icon {
  width: 38px; height: 38px;
  border-radius: 50%;
  background: var(--primary);
  color: #fff;
  display: flex; align-items: center; justify-content: center;
  font-size: .875rem;
  box-shadow: 0 2px 8px rgba(27,123,164,.28);
}
.logo-text {
  font-size: 1.25rem;
  font-weight: 800;
  color: var(--text);
  letter-spacing: .02em;
}
.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: 8px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
}
.nav-toggle .bar {
  width: 20px; height: 2px;
  background: var(--text);
  border-radius: 2px;
  transition: var(--transition);
}
.nav-toggle:hover { border-color: var(--primary); }
.nav-toggle:hover .bar { background: var(--primary); }

/* Article Banner */
.article-banner {
  background: linear-gradient(135deg, rgba(27,123,164,.08), rgba(27,123,164,.02)), url('/assets/images/backpic/back-1.webp') center/cover no-repeat;
  padding: 30px 0 22px;
  border-bottom: 1px solid var(--border);
  position: relative;
}
.article-banner::before {
  content: '';
  position: absolute;
  inset: 0;
  background: rgba(255,255,255,.82);
}
.article-banner .container { position: relative; z-index: 1; }
.breadcrumb {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: .875rem;
  color: var(--text-secondary);
  flex-wrap: wrap;
}
.breadcrumb a { color: var(--primary); transition: var(--transition); }
.breadcrumb a:hover { color: var(--primary-dark); }
.breadcrumb .sep { color: #B4C4D0; }
.breadcrumb .current {
  color: var(--text);
  font-weight: 500;
  word-break: break-word;
}

/* Article Layout */
.article-page { padding: 40px 0 72px; }
.article-layout {
  display: flex;
  gap: 36px;
  align-items: flex-start;
}
.article-main { flex: 1; min-width: 0; }

/* Article Card */
.article-card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  overflow: hidden;
  margin-bottom: 24px;
}
.article-header { padding: 36px 40px 20px; }
.article-header h1 {
  font-size: clamp(1.5rem, 2.6vw, 2.1rem);
  font-weight: 800;
  line-height: 1.45;
  color: var(--text);
  margin-bottom: 18px;
  word-break: break-word;
}
.article-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 20px;
  font-size: .875rem;
  color: var(--text-secondary);
  border-top: 1px solid var(--border);
  padding-top: 16px;
}
.meta-item { display: inline-flex; align-items: center; gap: 6px; }
.meta-item i { color: var(--primary); font-size: .8125rem; }

/* Article Content */
.article-content {
  padding: 8px 40px 40px;
  font-size: 1rem;
  line-height: 1.8;
  color: var(--text);
  word-break: break-word;
}
.article-content p { margin-bottom: 1.2em; }
.article-content h2 {
  font-size: 1.5rem;
  font-weight: 700;
  margin: 2em 0 .8em;
  padding-bottom: .4em;
  border-bottom: 2px solid var(--primary-light);
  color: var(--text);
}
.article-content h3 {
  font-size: 1.2rem;
  font-weight: 700;
  margin: 1.6em 0 .6em;
  color: var(--text);
}
.article-content h4 {
  font-size: 1.05rem;
  font-weight: 600;
  margin: 1.4em 0 .5em;
  color: var(--text);
}
.article-content img {
  max-width: 100%;
  height: auto;
  border-radius: var(--radius-sm);
  margin: 24px auto;
  box-shadow: var(--shadow);
}
.article-content a {
  color: var(--primary);
  text-decoration: underline;
  text-underline-offset: 3px;
  transition: var(--transition);
}
.article-content a:hover { color: var(--primary-dark); }
.article-content blockquote {
  border-left: 4px solid var(--primary);
  background: var(--primary-light);
  padding: 14px 20px;
  margin: 20px 0;
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  color: var(--text-secondary);
  font-style: italic;
}
.article-content ul, .article-content ol {
  margin: 0 0 1.2em 1.6em;
}
.article-content ul { list-style: disc; }
.article-content ol { list-style: decimal; }
.article-content li { margin-bottom: .4em; }
.article-content table {
  width: 100%;
  border-collapse: collapse;
  margin: 20px 0;
  font-size: .9375rem;
}
.article-content table th,
.article-content table td {
  border: 1px solid var(--border);
  padding: 10px 14px;
  text-align: left;
}
.article-content table th { background: var(--primary-light); font-weight: 600; }

/* Pagination */
.article-pagination {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 24px;
}
.page-btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 10px 20px;
  font-size: .9375rem;
  color: var(--text);
  transition: var(--transition);
  box-shadow: var(--shadow);
}
.page-btn:hover {
  border-color: var(--primary);
  color: var(--primary);
  box-shadow: var(--shadow-hover);
  transform: translateY(-1px);
}
.page-btn i { font-size: .8125rem; }

/* Article Actions */
.article-actions {
  display: flex;
  gap: 14px;
  margin-bottom: 32px;
  flex-wrap: wrap;
}
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  border-radius: var(--radius-sm);
  padding: 12px 28px;
  font-size: .9375rem;
  font-weight: 600;
  transition: var(--transition);
  border: 1px solid transparent;
}
.btn:focus-visible {
  outline: 3px solid rgba(27,123,164,.3);
  outline-offset: 2px;
}
.btn-accent {
  background: var(--accent);
  color: #fff;
  box-shadow: 0 3px 12px rgba(228,122,53,.25);
}
.btn-accent:hover {
  background: var(--accent-dark);
  box-shadow: 0 5px 18px rgba(228,122,53,.35);
  transform: translateY(-1px);
}
.btn-accent:active { transform: translateY(0); }
.btn-outline {
  background: var(--card);
  border-color: var(--primary);
  color: var(--primary);
}
.btn-outline:hover {
  background: var(--primary-light);
  border-color: var(--primary-dark);
  color: var(--primary-dark);
  transform: translateY(-1px);
}
.btn-outline:active { transform: translateY(0); }

/* Related Posts */
.related-posts { margin-top: 8px; }
.related-posts h2 {
  font-size: 1.4rem;
  font-weight: 700;
  margin-bottom: 20px;
  padding-left: 14px;
  border-left: 4px solid var(--accent);
  color: var(--text);
}
.related-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}
.related-card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  transition: var(--transition);
  box-shadow: var(--shadow);
  display: flex;
  flex-direction: column;
}
.related-card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-hover);
  border-color: var(--primary);
}
.related-card img {
  width: 100%;
  aspect-ratio: 16/9;
  object-fit: cover;
}
.related-card .card-tag {
  display: inline-block;
  background: var(--primary-light);
  color: var(--primary);
  font-size: .75rem;
  font-weight: 600;
  padding: 4px 12px;
  border-radius: 20px;
  margin: 16px 16px 0;
  align-self: flex-start;
}
.related-card h3 {
  font-size: 1.0625rem;
  font-weight: 600;
  margin: 10px 16px 0;
  color: var(--text);
  line-height: 1.5;
}
.related-card p {
  font-size: .875rem;
  color: var(--text-secondary);
  margin: 8px 16px 18px;
  line-height: 1.6;
  flex: 1;
}

/* Sidebar */
.article-sidebar {
  width: 280px;
  flex-shrink: 0;
  position: sticky;
  top: 92px;
}
.sidebar-card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 22px;
  margin-bottom: 18px;
  box-shadow: var(--shadow);
}
.sidebar-card h3 {
  font-size: 1rem;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 14px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--border);
}
.toc-card ul { display: flex; flex-direction: column; gap: 6px; }
.toc-card li { font-size: .875rem; line-height: 1.5; }
.toc-card li.toc-sub { padding-left: 16px; font-size: .8125rem; color: var(--text-secondary); }
.toc-card a {
  color: var(--text-secondary);
  transition: var(--transition);
  display: block;
  padding: 4px 8px;
  border-radius: 4px;
}
.toc-card a:hover {
  color: var(--primary);
  background: var(--primary-light);
}
.sidebar-related .side-link {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 8px 0;
  border-bottom: 1px solid var(--border);
  transition: var(--transition);
}
.sidebar-related .side-link:last-child { border-bottom: none; }
.sidebar-related .side-link:hover { padding-left: 6px; }
.sidebar-related .side-link img {
  width: 48px; height: 36px;
  object-fit: cover;
  border-radius: 6px;
  flex-shrink: 0;
}
.sidebar-related .side-link span {
  font-size: .875rem;
  font-weight: 500;
  color: var(--text);
}
.sidebar-related .side-link:hover span { color: var(--primary); }

/* Not Found */
.not-found-card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 60px 40px;
  text-align: center;
  box-shadow: var(--shadow);
}
.not-found-card h2 {
  font-size: 1.5rem;
  color: var(--text);
  margin-bottom: 12px;
}
.not-found-card p { margin-bottom: 20px; color: var(--text-secondary); }
.not-found-card a {
  display: inline-block;
  background: var(--primary);
  color: #fff;
  padding: 10px 28px;
  border-radius: var(--radius-sm);
  font-size: .9375rem;
  font-weight: 600;
  transition: var(--transition);
}
.not-found-card a:hover { background: var(--primary-dark); transform: translateY(-1px); }

/* Footer */
.site-footer {
  background: var(--footer-bg);
  color: #B8C9D6;
  padding-top: 56px;
  margin-top: 0;
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.2fr 1fr 1fr 1.2fr;
  gap: 36px;
  padding-bottom: 40px;
}
.footer-logo {
  font-size: 1.25rem;
  font-weight: 800;
  color: #fff;
  margin-bottom: 10px;
  letter-spacing: .02em;
}
.footer-brand p { font-size: .875rem; line-height: 1.7; color: #9FB3C2; max-width: 260px; }
.footer-col h4 {
  font-size: .9375rem;
  font-weight: 600;
  color: #fff;
  margin-bottom: 16px;
}
.footer-col ul { display: flex; flex-direction: column; gap: 8px; }
.footer-col ul li { font-size: .875rem; }
.footer-col ul a {
  color: #9FB3C2;
  transition: var(--transition);
}
.footer-col ul a:hover { color: #fff; padding-left: 4px; }
.footer-col p { font-size: .875rem; color: #9FB3C2; line-height: 1.6; }
.footer-bottom {
  border-top: 1px solid rgba(255,255,255,.08);
  padding: 20px 0;
}
.footer-copy {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: .8125rem;
  color: #7A94A6;
}

/* Responsive */
@media (max-width: 1024px) {
  .related-grid { grid-template-columns: repeat(2, 1fr); }
  .article-layout { gap: 24px; }
  .article-sidebar { width: 240px; }
  .article-header { padding: 28px 28px 16px; }
  .article-content { padding: 8px 28px 28px; }
}

@media (max-width: 768px) {
  .header-inner { height: 60px; }
  .main-nav { display: none; flex-direction: column; position: absolute; top: 60px; left: 0; right: 0; background: var(--card); border-bottom: 1px solid var(--border); box-shadow: 0 8px 24px rgba(15,43,58,.1); padding: 16px 20px; gap: 0; align-items: flex-start; }
  .header-inner.nav-open .main-nav { display: flex; }
  .main-nav-left { z-index: 10; }
  .main-nav-right { z-index: 10; }
  .main-nav .nav-link { width: 100%; padding: 12px 8px; border-bottom: 1px solid var(--border); }
  .main-nav .nav-link:last-child { border-bottom: none; }
  .main-nav .nav-link.active::after { display: none; }
  .main-nav .nav-link.active { color: var(--primary); background: var(--primary-light); border-radius: var(--radius-sm); }
  .site-logo { position: static; transform: none; }
  .nav-toggle { display: flex; }
  .logo-text { font-size: 1.0625rem; }
  .logo-icon { width: 32px; height: 32px; font-size: .75rem; }
  .article-page { padding: 24px 0 48px; }
  .article-layout { flex-direction: column; }
  .article-sidebar { width: 100%; position: static; display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
  .sidebar-card { margin-bottom: 0; }
  .article-header h1 { font-size: 1.4rem; }
  .article-meta { gap: 12px; flex-direction: column; }
  .article-content { font-size: .9375rem; padding: 8px 20px 24px; }
  .related-grid { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr 1fr; gap: 28px; }
  .footer-copy { flex-direction: column; gap: 8px; text-align: center; }
}

@media (max-width: 520px) {
  .container { padding: 0 16px; }
  .article-banner { padding: 20px 0 16px; }
  .article-header { padding: 24px 20px 14px; }
  .article-content { padding: 6px 20px 20px; }
  .article-actions { flex-direction: column; }
  .btn { width: 100%; justify-content: center; }
  .article-pagination { flex-direction: column; }
  .page-btn { width: 100%; justify-content: center; }
  .related-grid { gap: 14px; }
  .footer-grid { grid-template-columns: 1fr; gap: 24px; }
  .article-sidebar { grid-template-columns: 1fr; }
  .nav-link { font-size: .875rem; }
  .logo-text { font-size: 1rem; }
}

/* roulang page: category2 */
:root {
            --primary: #1B7BA4;
            --primary-dark: #166184;
            --primary-light: #E6F2F9;
            --accent: #E47A35;
            --accent-dark: #C96528;
            --bg: #F3F7FA;
            --white: #FFFFFF;
            --text: #1F2E3A;
            --text-secondary: #5A6E7D;
            --border: #E1E9EF;
            --success: #2B8C8C;
            --footer-bg: #0F2B3A;
            --radius-card: 12px;
            --radius-btn: 8px;
            --shadow-card: 0 2px 10px rgba(15, 43, 58, .06);
            --shadow-hover: 0 4px 20px rgba(15, 43, 58, .12);
            --transition: all .3s ease;
            --container-w: 1200px;
            --section-space: 64px;
            --card-padding: 24px;
        }

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

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: "PingFang SC", "Microsoft YaHei", "Hiragino Sans GB", "Helvetica Neue", Arial, sans-serif;
            font-size: 16px;
            line-height: 1.8;
            color: var(--text);
            background: var(--bg);
            -webkit-font-smoothing: antialiased;
        }

        img {
            max-width: 100%;
            height: auto;
            display: block;
            border-radius: var(--radius-card);
        }

        a {
            color: var(--primary);
            text-decoration: underline;
            text-underline-offset: 3px;
            transition: var(--transition);
        }

        a:hover {
            color: var(--primary-dark);
        }

        button,
        input {
            font-family: inherit;
        }

        .container {
            max-width: var(--container-w);
            margin: 0 auto;
            padding-left: 20px;
            padding-right: 20px;
        }

        .visually-hidden {
            position: absolute;
            width: 1px;
            height: 1px;
            overflow: hidden;
            clip: rect(0, 0, 0, 0);
            white-space: nowrap;
        }

        /* ===== Header & Nav ===== */
        .site-header {
            background: var(--white);
            border-bottom: 1px solid var(--border);
            transition: var(--transition);
        }

        .site-header.sticky {
            position: sticky;
            top: 0;
            z-index: 100;
            box-shadow: 0 2px 12px rgba(15, 43, 58, .08);
        }

        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            min-height: 72px;
        }

        .logo-area {
            display: flex;
            align-items: center;
            gap: 10px;
            text-decoration: none;
        }

        .logo-badge {
            width: 38px;
            height: 38px;
            border-radius: 50%;
            background: var(--primary);
            display: flex;
            align-items: center;
            justify-content: center;
            flex-shrink: 0;
        }

        .logo-badge svg {
            width: 20px;
            height: 20px;
            fill: none;
            stroke: #fff;
            stroke-width: 2.5;
            stroke-linecap: round;
            stroke-linejoin: round;
        }

        .logo-text {
            font-size: 1.25rem;
            font-weight: 800;
            color: var(--text);
            letter-spacing: .5px;
            white-space: nowrap;
        }

        .nav-left,
        .nav-right {
            display: flex;
            align-items: center;
            gap: 4px;
        }

        .nav-link {
            display: inline-block;
            padding: 8px 16px;
            font-size: .9375rem;
            font-weight: 500;
            color: var(--text);
            text-decoration: none;
            border-radius: var(--radius-btn);
            position: relative;
            transition: var(--transition);
        }

        .nav-link:hover {
            color: var(--primary);
            background: var(--primary-light);
        }

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

        .nav-link.active::after {
            content: "";
            position: absolute;
            bottom: 2px;
            left: 50%;
            transform: translateX(-50%);
            width: 24px;
            height: 3px;
            border-radius: 3px;
            background: var(--accent);
        }

        .nav-cta {
            display: inline-block;
            padding: 8px 20px;
            background: var(--primary);
            color: var(--white) !important;
            border-radius: var(--radius-btn);
            font-weight: 600;
            text-decoration: none;
            transition: var(--transition);
        }

        .nav-cta:hover {
            background: var(--primary-dark);
            box-shadow: 0 4px 12px rgba(27, 123, 164, .25);
        }

        .nav-toggle {
            display: none;
            width: 44px;
            height: 44px;
            border: 1px solid var(--border);
            border-radius: var(--radius-btn);
            background: var(--white);
            cursor: pointer;
            align-items: center;
            justify-content: center;
            flex-direction: column;
            gap: 5px;
        }

        .nav-toggle span {
            display: block;
            width: 20px;
            height: 2px;
            background: var(--text);
            border-radius: 2px;
            transition: var(--transition);
        }

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

        .nav-toggle.active span:nth-child(2) {
            opacity: 0;
        }

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

        /* ===== Hero Banner ===== */
        .category-hero {
            position: relative;
            background: linear-gradient(135deg, rgba(15, 43, 58, .78), rgba(27, 123, 164, .65)), url('/assets/images/backpic/back-2.webp') center center / cover no-repeat;
            padding: 64px 0 56px;
            color: var(--white);
            text-align: center;
        }

        .breadcrumb {
            display: flex;
            justify-content: center;
            gap: 8px;
            font-size: .8125rem;
            color: rgba(255, 255, 255, .75);
            margin-bottom: 16px;
            flex-wrap: wrap;
        }

        .breadcrumb a {
            color: rgba(255, 255, 255, .85);
            text-decoration: none;
        }

        .breadcrumb a:hover {
            color: #fff;
            text-decoration: underline;
        }

        .breadcrumb .sep {
            opacity: .5;
        }

        .breadcrumb .current {
            color: #fff;
            font-weight: 600;
        }

        .category-hero h1 {
            font-size: clamp(2rem, 3vw, 2.5rem);
            font-weight: 800;
            letter-spacing: 1px;
            margin-bottom: 12px;
            color: #fff;
        }

        .category-hero .hero-desc {
            max-width: 640px;
            margin: 0 auto;
            font-size: 1.0625rem;
            line-height: 1.8;
            color: rgba(255, 255, 255, .9);
        }

        .hero-badge {
            display: inline-block;
            background: var(--accent);
            color: #fff;
            font-size: .75rem;
            font-weight: 600;
            padding: 4px 12px;
            border-radius: 20px;
            letter-spacing: 1px;
            margin-bottom: 14px;
        }

        /* ===== Main Content ===== */
        .category-main {
            padding: var(--section-space) 0;
        }

        .cat-layout {
            display: grid;
            grid-template-columns: minmax(0, 1fr) 320px;
            gap: 40px;
            align-items: start;
        }

        .cat-content {
            min-width: 0;
        }

        .cat-sidebar {
            position: sticky;
            top: 90px;
            display: flex;
            flex-direction: column;
            gap: 20px;
        }

        /* Section Headers */
        .section-head {
            margin-bottom: 28px;
            position: relative;
            padding-left: 18px;
        }

        .section-head::before {
            content: "";
            position: absolute;
            left: 0;
            top: 6px;
            bottom: 6px;
            width: 4px;
            border-radius: 4px;
            background: var(--accent);
        }

        .section-head h2 {
            font-size: 1.75rem;
            font-weight: 800;
            color: var(--text);
            line-height: 1.4;
            margin-bottom: 6px;
        }

        .section-head p {
            color: var(--text-secondary);
            font-size: .9375rem;
        }

        /* Intro Card */
        .intro-card {
            background: var(--white);
            border: 1px solid var(--border);
            border-radius: var(--radius-card);
            box-shadow: var(--shadow-card);
            padding: var(--card-padding);
            margin-bottom: 40px;
            transition: var(--transition);
        }

        .intro-card:hover {
            box-shadow: var(--shadow-hover);
            border-color: rgba(27, 123, 164, .3);
        }

        .intro-card p {
            margin-bottom: 1em;
            font-size: .9375rem;
            color: var(--text);
        }

        .intro-card p:last-child {
            margin-bottom: 0;
        }

        .intro-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 20px;
            margin-top: 20px;
        }

        .intro-item {
            background: var(--bg);
            border-radius: var(--radius-btn);
            padding: 16px;
            text-align: center;
        }

        .intro-item .num {
            font-size: 1.5rem;
            font-weight: 800;
            color: var(--primary);
            line-height: 1.2;
        }

        .intro-item .label {
            font-size: .8125rem;
            color: var(--text-secondary);
            margin-top: 4px;
        }

        /* Guide List */
        .guide-list {
            display: flex;
            flex-direction: column;
            gap: 16px;
            margin-bottom: 40px;
        }

        .guide-item {
            background: var(--white);
            border: 1px solid var(--border);
            border-radius: var(--radius-card);
            box-shadow: var(--shadow-card);
            padding: 24px;
            display: flex;
            gap: 20px;
            transition: var(--transition);
            position: relative;
        }

        .guide-item:hover {
            box-shadow: var(--shadow-hover);
            border-color: var(--primary);
            transform: translateY(-2px);
        }

        .guide-icon {
            flex-shrink: 0;
            width: 48px;
            height: 48px;
            border-radius: 50%;
            background: var(--primary-light);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--primary);
            font-size: 1.25rem;
            font-weight: 700;
        }

        .guide-body h3 {
            font-size: 1.125rem;
            font-weight: 700;
            color: var(--text);
            margin-bottom: 6px;
            line-height: 1.5;
        }

        .guide-body p {
            font-size: .875rem;
            color: var(--text-secondary);
            line-height: 1.7;
            margin-bottom: 8px;
        }

        .guide-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 8px;
            margin-top: 8px;
        }

        .tag {
            display: inline-block;
            padding: 3px 12px;
            border-radius: 20px;
            font-size: .75rem;
            background: var(--primary-light);
            color: var(--primary);
            font-weight: 500;
        }

        .tag-accent {
            background: rgba(228, 122, 53, .12);
            color: var(--accent);
        }

        /* Steps */
        .steps-section {
            margin-bottom: 40px;
        }

        .steps-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
            counter-reset: step-counter;
        }

        .step-card {
            background: var(--white);
            border: 1px solid var(--border);
            border-radius: var(--radius-card);
            padding: 24px;
            position: relative;
            box-shadow: var(--shadow-card);
            transition: var(--transition);
            counter-increment: step-counter;
        }

        .step-card::before {
            content: counter(step-counter);
            position: absolute;
            top: -14px;
            left: 20px;
            width: 28px;
            height: 28px;
            border-radius: 50%;
            background: var(--primary);
            color: #fff;
            font-size: .875rem;
            font-weight: 700;
            display: flex;
            align-items: center;
            justify-content: center;
        }

        .step-card:hover {
            transform: translateY(-3px);
            box-shadow: var(--shadow-hover);
            border-color: rgba(27, 123, 164, .3);
        }

        .step-card h3 {
            font-size: 1rem;
            font-weight: 700;
            margin-bottom: 6px;
            color: var(--text);
        }

        .step-card p {
            font-size: .8125rem;
            color: var(--text-secondary);
            line-height: 1.7;
        }

        /* Scenarios */
        .scenarios-section {
            margin-bottom: 40px;
        }

        .scenarios-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 20px;
        }

        .scenario-card {
            background: var(--white);
            border: 1px solid var(--border);
            border-radius: var(--radius-card);
            box-shadow: var(--shadow-card);
            padding: 24px;
            display: flex;
            gap: 16px;
            align-items: flex-start;
            transition: var(--transition);
        }

        .scenario-card:hover {
            box-shadow: var(--shadow-hover);
            border-color: var(--primary);
        }

        .scenario-icon {
            width: 42px;
            height: 42px;
            border-radius: 10px;
            background: var(--primary-light);
            color: var(--primary);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.25rem;
            flex-shrink: 0;
        }

        .scenario-body h3 {
            font-size: 1rem;
            font-weight: 700;
            margin-bottom: 4px;
            color: var(--text);
        }

        .scenario-body p {
            font-size: .875rem;
            color: var(--text-secondary);
            line-height: 1.7;
        }

        /* Sidebar Card */
        .sidebar-card {
            background: var(--white);
            border: 1px solid var(--border);
            border-radius: var(--radius-card);
            box-shadow: var(--shadow-card);
            padding: var(--card-padding);
        }

        .sidebar-card h3 {
            font-size: 1rem;
            font-weight: 700;
            color: var(--text);
            margin-bottom: 14px;
            padding-bottom: 10px;
            border-bottom: 2px solid var(--primary-light);
            position: relative;
        }

        .sidebar-card h3::after {
            content: "";
            position: absolute;
            bottom: -2px;
            left: 0;
            width: 40px;
            height: 2px;
            background: var(--primary);
            border-radius: 2px;
        }

        .sidebar-links {
            list-style: none;
            display: flex;
            flex-direction: column;
            gap: 4px;
        }

        .sidebar-links li {
            border-radius: var(--radius-btn);
            transition: var(--transition);
        }

        .sidebar-links a {
            display: block;
            padding: 10px 14px;
            color: var(--text);
            text-decoration: none;
            font-size: .875rem;
            border-radius: var(--radius-btn);
            transition: var(--transition);
            position: relative;
            padding-left: 20px;
        }

        .sidebar-links a::before {
            content: "→";
            position: absolute;
            left: 4px;
            color: var(--primary);
            opacity: .6;
            transition: var(--transition);
        }

        .sidebar-links a:hover {
            background: var(--primary-light);
            color: var(--primary);
            padding-left: 24px;
        }

        .sidebar-note {
            margin-top: 16px;
            padding: 14px;
            background: rgba(43, 140, 140, .08);
            border-radius: var(--radius-btn);
            font-size: .8125rem;
            color: var(--text-secondary);
            border-left: 3px solid var(--success);
            line-height: 1.7;
        }

        /* FAQ */
        .faq-section {
            margin-bottom: 40px;
        }

        .faq-list {
            display: flex;
            flex-direction: column;
            gap: 0;
            background: var(--white);
            border: 1px solid var(--border);
            border-radius: var(--radius-card);
            box-shadow: var(--shadow-card);
            overflow: hidden;
        }

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

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

        .faq-question {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 20px 24px;
            cursor: pointer;
            font-size: .9375rem;
            font-weight: 600;
            color: var(--text);
            transition: var(--transition);
            line-height: 1.6;
            user-select: none;
        }

        .faq-question:hover {
            background: rgba(27, 123, 164, .03);
        }

        .faq-icon {
            width: 28px;
            height: 28px;
            border-radius: 50%;
            border: 1px solid var(--border);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1rem;
            color: var(--primary);
            transition: var(--transition);
            flex-shrink: 0;
            margin-left: 12px;
            font-weight: 400;
        }

        .faq-item.active .faq-icon {
            transform: rotate(45deg);
            background: var(--primary);
            border-color: var(--primary);
            color: #fff;
        }

        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height .4s ease;
            padding: 0 24px;
        }

        .faq-item.active .faq-answer {
            max-height: 300px;
            padding-bottom: 18px;
        }

        .faq-answer p {
            font-size: .875rem;
            color: var(--text-secondary);
            line-height: 1.8;
            padding-top: 4px;
            border-left: 3px solid var(--accent);
            padding-left: 16px;
        }

        /* CTA */
        .cta-section {
            background: rgba(27, 123, 164, .06);
            border-radius: var(--radius-card);
            padding: 40px;
            text-align: center;
            margin-bottom: 40px;
            border: 1px solid rgba(27, 123, 164, .15);
        }

        .cta-section h2 {
            font-size: 1.5rem;
            font-weight: 800;
            color: var(--text);
            margin-bottom: 10px;
        }

        .cta-section p {
            color: var(--text-secondary);
            font-size: .9375rem;
            max-width: 520px;
            margin: 0 auto 24px;
            line-height: 1.8;
        }

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

        .btn {
            display: inline-block;
            padding: 12px 28px;
            border-radius: var(--radius-btn);
            font-size: .9375rem;
            font-weight: 600;
            text-decoration: none;
            cursor: pointer;
            transition: var(--transition);
            border: 1px solid transparent;
            line-height: 1.5;
        }

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

        .btn-primary:hover {
            background: var(--primary-dark);
            box-shadow: 0 4px 14px rgba(27, 123, 164, .3);
            color: #fff;
            transform: translateY(-1px);
        }

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

        .btn-accent:hover {
            background: var(--accent-dark);
            box-shadow: 0 4px 14px rgba(228, 122, 53, .3);
            color: #fff;
            transform: translateY(-1px);
        }

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

        .btn-outline:hover {
            background: rgba(27, 123, 164, .06);
            border-color: var(--primary-dark);
            color: var(--primary-dark);
        }

        /* Back home */
        .back-home {
            text-align: center;
            margin-top: 10px;
        }

        /* Footer */
        .site-footer {
            background: var(--footer-bg);
            color: rgba(255, 255, 255, .85);
            padding: 56px 0 0;
            margin-top: 20px;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 1.4fr 1fr 1fr 1.2fr;
            gap: 40px;
            padding-bottom: 40px;
            border-bottom: 1px solid rgba(255, 255, 255, .08);
        }

        .footer-logo {
            font-size: 1.375rem;
            font-weight: 800;
            color: #fff;
            margin-bottom: 10px;
            letter-spacing: .5px;
        }

        .footer-brand p {
            font-size: .875rem;
            line-height: 1.7;
            color: rgba(255, 255, 255, .65);
            max-width: 260px;
        }

        .footer-col h4 {
            font-size: .9375rem;
            font-weight: 700;
            color: #fff;
            margin-bottom: 14px;
            position: relative;
            padding-bottom: 8px;
        }

        .footer-col h4::after {
            content: "";
            position: absolute;
            bottom: 0;
            left: 0;
            width: 24px;
            height: 2px;
            background: var(--accent);
            border-radius: 2px;
        }

        .footer-col ul {
            list-style: none;
            display: flex;
            flex-direction: column;
            gap: 8px;
        }

        .footer-col ul a {
            color: rgba(255, 255, 255, .65);
            text-decoration: none;
            font-size: .875rem;
            transition: var(--transition);
            line-height: 1.6;
        }

        .footer-col ul a:hover {
            color: #fff;
            padding-left: 4px;
        }

        .footer-col p {
            font-size: .8125rem;
            color: rgba(255, 255, 255, .55);
            line-height: 1.7;
            margin-bottom: 8px;
        }

        .footer-bottom {
            padding: 20px 0;
            text-align: center;
            border-top: 1px solid rgba(255, 255, 255, .06);
        }

        .footer-copy {
            display: flex;
            justify-content: space-between;
            align-items: center;
            font-size: .8125rem;
            color: rgba(255, 255, 255, .45);
        }

        /* Responsive */
        @media (max-width: 1024px) {
            :root {
                --section-space: 48px;
            }

            .cat-layout {
                grid-template-columns: 1fr;
            }

            .cat-sidebar {
                position: static;
                display: grid;
                grid-template-columns: repeat(2, 1fr);
                gap: 20px;
            }

            .steps-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 20px;
            }

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

        @media (max-width: 768px) {
            .header-inner {
                flex-wrap: wrap;
                min-height: 64px;
                padding: 8px 0;
            }

            .logo-area {
                order: 2;
                margin: 0 auto;
            }

            .nav-toggle {
                order: 1;
                display: flex;
            }

            .nav-left,
            .nav-right {
                order: 3;
                width: 100%;
                display: none;
                flex-direction: column;
                align-items: flex-start;
                padding: 12px 0 16px;
                gap: 2px;
            }

            .nav-left.open,
            .nav-right.open {
                display: flex;
            }

            .nav-link {
                display: block;
                width: 100%;
                padding: 12px 16px;
                font-size: 1rem;
            }

            .nav-link.active::after {
                left: 16px;
                top: 50%;
                transform: translateY(-50%);
                width: 3px;
                height: 20px;
            }

            .nav-cta {
                margin: 8px 16px 4px;
                text-align: center;
                width: calc(100% - 32px);
            }

            .category-hero {
                padding: 40px 0 36px;
            }

            .intro-grid {
                grid-template-columns: 1fr;
                gap: 10px;
            }

            .guide-item {
                flex-direction: column;
                gap: 12px;
                padding: 20px;
            }

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

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

            .cat-sidebar {
                grid-template-columns: 1fr;
            }

            .cta-section {
                padding: 28px 20px;
            }

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

            .footer-copy {
                flex-direction: column;
                gap: 6px;
            }
        }

        @media (max-width: 520px) {
            body {
                font-size: 15px;
            }

            .logo-text {
                font-size: 1.0625rem;
            }

            .nav-toggle {
                width: 40px;
                height: 40px;
            }

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

            .step-card {
                padding: 20px;
            }

            .cta-buttons .btn {
                width: 100%;
                text-align: center;
            }

            .btn {
                padding: 10px 20px;
            }

            .category-hero h1 {
                font-size: 1.75rem;
            }

            .category-hero .hero-desc {
                font-size: .9375rem;
            }

            .section-head h2 {
                font-size: 1.5rem;
            }
        }