/* roulang page: index */
:root {
  --primary: #0F766E;
  --primary-dark: #0B5D57;
  --accent: #D97706;
  --accent-dark: #B25E00;
  --bg: #F8F7F4;
  --card-bg: #FFFFFF;
  --border: #E7E5E0;
  --text: #1C2B2A;
  --text-light: #64706E;
  --white: #FFFFFF;
  --radius: 14px;
  --radius-sm: 8px;
  --shadow-sm: 0 2px 10px rgba(28,43,42,0.06);
  --shadow-md: 0 6px 20px rgba(28,43,42,0.12);
  --space-section: 96px;
  --font: "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
}
* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}
html {
  scroll-behavior: smooth;
}
body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  line-height: 1.75;
  font-size: 1rem;
  -webkit-font-smoothing: antialiased;
}
a {
  color: inherit;
  text-decoration: none;
}
img {
  max-width: 100%;
  display: block;
}
button {
  font-family: inherit;
  border: none;
  background: none;
  cursor: pointer;
}
ul {
  list-style: none;
}
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

/* ---------- 顶部导航 ---------- */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid rgba(231, 229, 224, 0.8);
  transition: box-shadow 0.3s ease;
}
.site-header.scrolled {
  box-shadow: 0 4px 20px rgba(28, 43, 42, 0.06);
}
.nav-wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 76px;
  gap: 16px;
  position: relative;
}
.nav-left {
  display: flex;
  align-items: center;
  gap: 24px;
}
.nav-right {
  display: flex;
  align-items: center;
  gap: 20px;
}
.brand-logo {
  position: absolute;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  align-items: center;
  gap: 10px;
  z-index: 2;
}
.brand-mark {
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--primary);
  border-radius: 12px;
  color: #fff;
  flex-shrink: 0;
}
.brand-mark svg {
  width: 22px;
  height: 22px;
}
.brand-name {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--text);
  letter-spacing: 0.02em;
  white-space: nowrap;
}
.nav-link {
  font-size: 1rem;
  font-weight: 500;
  color: var(--text);
  padding: 8px 2px;
  position: relative;
  transition: color 0.2s;
}
.nav-link::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 100%;
  height: 2px;
  background: var(--primary);
  transform: scaleX(0);
  transform-origin: center;
  transition: transform 0.25s ease;
}
.nav-link:hover {
  color: var(--primary);
}
.nav-link:hover::after {
  transform: scaleX(1);
}
.nav-link.active {
  background: var(--primary);
  color: #fff;
  padding: 8px 20px;
  border-radius: 999px;
  font-weight: 500;
}
.nav-link.active::after {
  display: none;
}
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 10px;
  font-weight: 500;
  padding: 10px 20px;
  font-size: 1rem;
  transition: all 0.25s ease;
  line-height: 1.4;
}
.btn-primary {
  background: var(--accent);
  color: #fff;
  border: 2px solid transparent;
}
.btn-primary:hover {
  background: var(--accent-dark);
  box-shadow: 0 4px 14px rgba(217, 119, 6, 0.35);
  transform: translateY(-1px);
}
.btn-primary:focus {
  outline: none;
  box-shadow: 0 0 0 3px rgba(217, 119, 6, 0.3);
}
.btn-outline {
  background: #fff;
  color: var(--primary);
  border: 2px solid var(--primary);
}
.btn-outline:hover {
  background: rgba(15, 118, 110, 0.05);
}
.btn-outline:focus {
  outline: none;
  box-shadow: 0 0 0 3px rgba(15, 118, 110, 0.15);
}
.btn-lg {
  padding: 14px 36px;
  font-size: 1.05rem;
  border-radius: 12px;
}
.btn-nav {
  padding: 8px 18px;
  font-size: 0.95rem;
  border-radius: 999px;
}
.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  width: 44px;
  height: 44px;
  border-radius: 10px;
  border: 1px solid var(--border);
  padding: 10px;
  gap: 5px;
}
.nav-toggle span {
  height: 2px;
  background: var(--text);
  border-radius: 2px;
  transition: all 0.3s ease;
}
.nav-toggle.active span:nth-child(1) {
  transform: rotate(45deg) translateY(7px);
}
.nav-toggle.active span:nth-child(2) {
  opacity: 0;
}
.nav-toggle.active span:nth-child(3) {
  transform: rotate(-45deg) translateY(-7px);
}
.mobile-panel {
  display: none;
  background: #fff;
  border-top: 1px solid var(--border);
  padding: 16px 24px 24px;
  flex-direction: column;
  gap: 12px;
  box-shadow: 0 16px 30px rgba(28, 43, 42, 0.1);
}
.mobile-panel.open {
  display: flex;
}
.mobile-link {
  font-size: 1rem;
  font-weight: 500;
  color: var(--text);
  padding: 10px 0;
  border-bottom: 1px solid rgba(231, 229, 224, 0.6);
}
.mobile-link.active {
  color: var(--primary);
  font-weight: 700;
}
.mobile-cta {
  margin-top: 8px;
}

/* ---------- 通用板块 ---------- */
.section-head {
  text-align: center;
  margin-bottom: 48px;
}
.section-kicker {
  font-size: 0.875rem;
  color: var(--accent);
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  margin-bottom: 8px;
}
.section-head h2 {
  font-size: clamp(1.5rem, 3vw, 2.2rem);
  font-weight: 700;
  color: var(--text);
  line-height: 1.3;
}
.section-desc {
  color: var(--text-light);
  font-size: 1rem;
  margin-top: 12px;
  max-width: 560px;
  margin-left: auto;
  margin-right: auto;
}

/* ---------- Hero ---------- */
.hero {
  background: var(--bg);
  padding-top: 76px;
  position: relative;
  overflow: hidden;
}
.hero-inner {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 64px;
  align-items: center;
  min-height: 80vh;
  padding: 64px 24px 80px;
  max-width: 1200px;
  margin: 0 auto;
}
.hero-overline {
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--primary);
  letter-spacing: 0.06em;
  background: rgba(15, 118, 110, 0.08);
  display: inline-block;
  padding: 6px 16px;
  border-radius: 999px;
  margin-bottom: 20px;
}
.hero h1 {
  font-size: clamp(2rem, 5vw, 3.2rem);
  font-weight: 700;
  line-height: 1.2;
  color: var(--text);
  margin-bottom: 20px;
}
.hero-sub {
  font-size: clamp(1rem, 1.6vw, 1.125rem);
  color: var(--text-light);
  max-width: 480px;
  line-height: 1.7;
  margin-bottom: 32px;
}
.hero-actions {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
  margin-bottom: 36px;
}
.hero-points {
  display: flex;
  gap: 20px;
  flex-wrap: wrap;
}
.hero-points li {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 0.875rem;
  color: var(--text-light);
}
.hero-points li::before {
  content: "";
  width: 6px;
  height: 6px;
  background: var(--accent);
  border-radius: 50%;
  flex-shrink: 0;
}
.hero-media {
  position: relative;
}
.hero-media img {
  width: 100%;
  aspect-ratio: 4 / 3;
  object-fit: cover;
  border-radius: 16px;
  border: 1px solid var(--border);
  box-shadow: 0 12px 30px rgba(28, 43, 42, 0.08);
}
.hero-wave {
  display: block;
  width: 100%;
  height: 60px;
  margin-top: -1px;
}

/* ---------- 三步上手 ---------- */
.steps-section {
  background: #fff;
  padding: var(--space-section) 0;
}
.steps-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
}
.step-card {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 36px 28px;
  box-shadow: var(--shadow-sm);
  transition: transform 0.3s ease, box-shadow 0.3s ease;
  display: flex;
  flex-direction: column;
}
.step-card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-md);
}
.step-card.featured {
  background: rgba(15, 118, 110, 0.04);
  border-color: rgba(15, 118, 110, 0.2);
}
.step-num {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: var(--accent);
  color: #fff;
  font-size: 0.875rem;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 20px;
  flex-shrink: 0;
}
.step-card h3 {
  font-size: 1.25rem;
  font-weight: 600;
  margin-bottom: 12px;
  color: var(--text);
}
.step-card p {
  font-size: 0.9375rem;
  color: var(--text-light);
  line-height: 1.7;
  margin-bottom: 20px;
  flex-grow: 1;
}
.step-link {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  color: var(--primary);
  font-weight: 500;
  font-size: 0.9375rem;
  transition: gap 0.25s ease;
}
.step-link:hover {
  gap: 10px;
}
.step-link .arrow {
  font-size: 1.1rem;
  line-height: 1;
}

/* ---------- 案例证明 ---------- */
.proof-section {
  background: var(--bg);
  padding: var(--space-section) 0;
}
.proof-stats {
  display: flex;
  justify-content: center;
  gap: 28px;
  margin-bottom: 64px;
  flex-wrap: wrap;
}
.stat-item {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 24px 40px;
  text-align: center;
  box-shadow: var(--shadow-sm);
  min-width: 160px;
}
.stat-num {
  display: block;
  font-size: 2rem;
  font-weight: 700;
  color: var(--primary);
  line-height: 1.2;
}
.stat-label {
  font-size: 0.875rem;
  color: var(--text-light);
  margin-top: 6px;
}
.case-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
}
.case-card {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}
.case-card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-md);
}
.case-media {
  aspect-ratio: 16 / 9;
  overflow: hidden;
}
.case-media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.4s ease;
}
.case-card:hover .case-media img {
  transform: scale(1.04);
}
.case-body {
  padding: 24px;
}
.case-body h3 {
  font-size: 1.125rem;
  font-weight: 600;
  margin-bottom: 8px;
  color: var(--text);
}
.case-body p {
  font-size: 0.875rem;
  color: var(--text-light);
  line-height: 1.65;
}

/* ---------- FAQ ---------- */
.faq-section {
  background: #fff;
  padding: var(--space-section) 0;
}
.faq-container {
  max-width: 760px;
}
.faq-list {
  display: flex;
  flex-direction: column;
  gap: 16px;
}
.faq-item {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: 10px;
  overflow: hidden;
  transition: box-shadow 0.25s ease;
}
.faq-item.open {
  box-shadow: var(--shadow-sm);
}
.faq-q {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 20px 24px;
  font-size: 1rem;
  font-weight: 600;
  color: var(--text);
  text-align: left;
  gap: 16px;
}
.faq-q:hover {
  color: var(--primary);
}
.faq-toggle {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background: rgba(15, 118, 110, 0.1);
  color: var(--primary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.2rem;
  font-weight: 400;
  transition: transform 0.3s ease, background 0.3s ease;
  flex-shrink: 0;
}
.faq-item.open .faq-toggle {
  transform: rotate(45deg);
  background: var(--accent);
  color: #fff;
}
.faq-a {
  display: none;
  background: #F3F4F2;
  border-left: 2px solid var(--primary);
  padding: 16px 20px;
  margin: 0 4px 4px 4px;
  border-radius: 0 8px 8px 0;
}
.faq-item.open .faq-a {
  display: block;
}
.faq-a p {
  font-size: 0.9375rem;
  color: var(--text);
  line-height: 1.75;
}

/* ---------- 最新动态 ---------- */
.news-section {
  background: var(--bg);
  padding: var(--space-section) 0;
}
.news-list {
  max-width: 860px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 20px;
}
.news-card {
  display: flex;
  align-items: center;
  background: #fff;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 16px;
  box-shadow: var(--shadow-sm);
  transition: transform 0.3s ease, box-shadow 0.3s ease;
  gap: 20px;
}
.news-card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-md);
}
.news-thumb {
  width: 160px;
  height: 100px;
  border-radius: var(--radius-sm);
  overflow: hidden;
  flex-shrink: 0;
}
.news-thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.news-main {
  flex: 1;
  min-width: 0;
}
.news-main h3 {
  font-size: 1.125rem;
  font-weight: 600;
  color: var(--text);
  margin-bottom: 6px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.news-main p {
  font-size: 0.875rem;
  color: var(--text-light);
  line-height: 1.6;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  margin-bottom: 8px;
}
.news-meta {
  display: flex;
  align-items: center;
  gap: 12px;
}
.news-date {
  font-size: 0.75rem;
  color: #9aa3a1;
}
.badge {
  display: inline-block;
  padding: 3px 12px;
  border-radius: 999px;
  background: rgba(15, 118, 110, 0.1);
  color: var(--primary);
  font-size: 0.75rem;
  font-weight: 500;
}
.news-arrow {
  flex-shrink: 0;
  color: var(--primary);
  font-size: 1.4rem;
  transition: transform 0.25s ease;
}
.news-card:hover .news-arrow {
  transform: translateX(6px);
}
.news-empty {
  text-align: center;
  padding: 48px 24px;
  background: #fff;
  border: 1px dashed var(--border);
  border-radius: var(--radius);
  color: var(--text-light);
  font-size: 0.9375rem;
}
@media (max-width: 576px) {
  .news-card {
    flex-direction: column;
    align-items: flex-start;
  }
  .news-thumb {
    width: 100%;
    height: 140px;
  }
  .news-arrow {
    position: absolute;
    right: 16px;
    bottom: 16px;
  }
  .news-card {
    position: relative;
  }
}

/* ---------- CTA 区 ---------- */
.cta-section {
  background: linear-gradient(135deg, #0F766E 0%, #0B5D57 100%);
  padding: 96px 0;
  position: relative;
  overflow: hidden;
}
.cta-section::before,
.cta-section::after {
  content: "";
  position: absolute;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.04);
}
.cta-section::before {
  width: 320px;
  height: 320px;
  left: -80px;
  top: -80px;
}
.cta-section::after {
  width: 240px;
  height: 240px;
  right: -40px;
  bottom: -60px;
}
.cta-inner {
  position: relative;
  z-index: 2;
  text-align: center;
}
.cta-inner h2 {
  font-size: clamp(1.75rem, 3vw, 2.5rem);
  font-weight: 700;
  color: #fff;
  margin-bottom: 12px;
}
.cta-inner p {
  font-size: 1rem;
  color: rgba(255, 255, 255, 0.8);
  margin-bottom: 32px;
}
.btn-accent {
  background: var(--accent);
  color: #fff;
  border: 2px solid transparent;
}
.btn-accent:hover {
  background: var(--accent-dark);
  box-shadow: 0 4px 14px rgba(217, 119, 6, 0.4);
}
.btn-accent:focus {
  outline: none;
  box-shadow: 0 0 0 3px rgba(217, 119, 6, 0.3);
}

/* ---------- 页脚 ---------- */
.site-footer {
  background: #142824;
  color: rgba(255, 255, 255, 0.7);
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr;
  gap: 40px;
  padding: 64px 0 48px;
}
.footer-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 16px;
}
.footer-logo .brand-mark {
  background: var(--primary);
}
.footer-logo span:last-child {
  font-size: 1.125rem;
  font-weight: 700;
  color: #fff;
}
.footer-brand p {
  font-size: 0.875rem;
  line-height: 1.7;
  color: rgba(255, 255, 255, 0.7);
  max-width: 320px;
}
.footer-col h4 {
  color: #fff;
  font-size: 1rem;
  font-weight: 600;
  margin-bottom: 20px;
}
.footer-col a {
  display: block;
  font-size: 0.875rem;
  color: rgba(255, 255, 255, 0.65);
  margin-bottom: 12px;
  transition: color 0.2s;
}
.footer-col a:hover {
  color: var(--accent);
}
.footer-col p {
  font-size: 0.875rem;
  color: rgba(255, 255, 255, 0.65);
  margin-bottom: 12px;
}
.footer-bottom {
  background: #0F1F1D;
}
.footer-bottom .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 20px 24px;
  flex-wrap: wrap;
  gap: 8px;
}
.footer-bottom p {
  font-size: 0.8125rem;
  color: rgba(255, 255, 255, 0.6);
}

/* ---------- 响应式 ---------- */
@media (max-width: 992px) {
  .steps-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .case-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .footer-grid {
    grid-template-columns: 1fr 1fr;
  }
}
@media (max-width: 768px) {
  .nav-left {
    display: none;
  }
  .nav-right nav {
    display: none;
  }
  .btn-nav {
    display: none;
  }
  .nav-toggle {
    display: flex;
  }
  .mobile-panel {
    position: fixed;
    top: 76px;
    left: 0;
    right: 0;
    z-index: 999;
  }
  .hero-inner {
    grid-template-columns: 1fr;
    gap: 32px;
    min-height: auto;
    padding: 120px 24px 60px;
  }
  .hero-media img {
    aspect-ratio: 4 / 3;
  }
  .steps-grid {
    grid-template-columns: 1fr;
    gap: 20px;
  }
  .case-grid {
    grid-template-columns: 1fr;
  }
  .footer-grid {
    grid-template-columns: 1fr;
    gap: 32px;
  }
  .proof-stats {
    gap: 14px;
  }
  .stat-item {
    padding: 16px 24px;
    min-width: 120px;
  }
}
@media (max-width: 576px) {
  :root {
    --space-section: 64px;
  }
  .container {
    padding: 0 16px;
  }
  .hero-inner {
    padding-left: 16px;
    padding-right: 16px;
  }
  .hero-actions {
    flex-direction: column;
    align-items: stretch;
  }
  .hero-actions .btn {
    width: 100%;
  }
  .btn-lg {
    padding: 14px 24px;
  }
  .brand-name {
    font-size: 1.05rem;
  }
  .brand-mark {
    width: 36px;
    height: 36px;
  }
  .proof-stats {
    flex-direction: column;
    align-items: center;
  }
  .stat-item {
    width: 100%;
    max-width: 260px;
  }
  .footer-bottom .container {
    flex-direction: column;
    text-align: center;
  }
}

/* roulang page: category1 */
:root {
  --primary: #0F766E;
  --primary-dark: #0B5D57;
  --primary-light: rgba(15, 118, 110, 0.1);
  --accent: #D97706;
  --accent-dark: #B25E00;
  --accent-glow: rgba(217, 119, 6, 0.35);
  --bg: #F8F7F4;
  --card-bg: #FFFFFF;
  --border: #E7E5E0;
  --text: #1C2B2A;
  --text-muted: #64706E;
  --white: #FFFFFF;
  --radius-lg: 14px;
  --radius-md: 10px;
  --radius-sm: 8px;
  --shadow: 0 2px 10px rgba(28, 43, 42, 0.06);
  --shadow-hover: 0 6px 20px rgba(28, 43, 42, 0.12);
  --space-section: 96px;
  --space-section-mobile: 64px;
  --font-family: "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-family);
  font-size: 1rem;
  line-height: 1.75;
  color: var(--text);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

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

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

ul {
  list-style: none;
}

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

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-md);
  padding: 0.9em 2em;
  font-size: 1rem;
  font-weight: 600;
  line-height: 1.2;
  transition: all 0.25s ease;
  white-space: nowrap;
}

.btn-accent {
  background: var(--accent);
  color: var(--white);
  box-shadow: 0 2px 8px rgba(217, 119, 6, 0.2);
}

.btn-accent:hover {
  background: var(--accent-dark);
  box-shadow: 0 4px 14px var(--accent-glow);
  transform: translateY(-1px);
}

.btn-accent:focus-visible {
  outline: none;
  box-shadow: 0 0 0 3px rgba(217, 119, 6, 0.3);
}

.btn-outline {
  background: var(--card-bg);
  border: 2px solid var(--primary);
  color: var(--primary);
}

.btn-outline:hover {
  background: var(--primary-light);
  transform: translateY(-1px);
}

.btn-outline:focus-visible {
  outline: none;
  box-shadow: 0 0 0 3px rgba(15, 118, 110, 0.15);
}

/* ===== Header / Nav ===== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255, 255, 255, 0.9);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
}

.header-inner {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  min-height: 72px;
  gap: 16px;
}

.nav-left {
  justify-self: start;
  display: flex;
  align-items: center;
  gap: 8px;
}

.nav-right {
  justify-self: end;
  display: flex;
  align-items: center;
  gap: 8px;
}

.nav-link {
  display: inline-flex;
  align-items: center;
  padding: 8px 16px;
  font-size: 16px;
  font-weight: 500;
  color: var(--text);
  border-radius: 24px;
  transition: color 0.2s ease, background 0.2s ease;
  position: relative;
}

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

.nav-link::after {
  content: "";
  position: absolute;
  left: 16px;
  right: 16px;
  bottom: 4px;
  height: 2px;
  background: var(--primary);
  border-radius: 2px;
  opacity: 0;
  transform: scaleX(0.4);
  transition: opacity 0.25s ease, transform 0.25s ease;
}

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

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

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

.brand-logo {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  justify-self: center;
  font-size: 1.35rem;
  font-weight: 700;
  color: var(--text);
  letter-spacing: 0.01em;
  transition: color 0.2s ease;
}

.brand-logo:hover {
  color: var(--primary);
}

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

.brand-mark svg {
  width: 22px;
  height: 22px;
}

.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 40px;
  height: 40px;
  border-radius: 8px;
  border: 1px solid var(--border);
  background: var(--card-bg);
  align-items: center;
  transition: border-color 0.2s ease;
}

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

.toggle-bar {
  display: block;
  width: 18px;
  height: 2px;
  background: var(--text);
  border-radius: 2px;
  transition: transform 0.3s ease, opacity 0.3s ease;
}

.nav-toggle[aria-expanded="true"] .toggle-bar:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.nav-toggle[aria-expanded="true"] .toggle-bar:nth-child(2) {
  opacity: 0;
}

.nav-toggle[aria-expanded="true"] .toggle-bar:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

.mobile-nav {
  display: none;
  position: fixed;
  top: 72px;
  left: 0;
  right: 0;
  background: var(--card-bg);
  border-bottom: 1px solid var(--border);
  box-shadow: 0 8px 24px rgba(28, 43, 42, 0.08);
  padding: 12px 24px 20px;
  z-index: 99;
}

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

.mobile-nav-link {
  display: block;
  padding: 12px 16px;
  font-size: 1rem;
  font-weight: 500;
  color: var(--text);
  border-radius: 8px;
  transition: background 0.2s ease, color 0.2s ease;
}

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

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

/* ===== Page Hero ===== */
.page-hero {
  position: relative;
  background-image: url('/assets/images/backpic/back-1.webp');
  background-size: cover;
  background-position: center;
  padding: 120px 0 140px;
  color: var(--white);
}

.page-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(12, 58, 54, 0.88), rgba(15, 118, 110, 0.72));
}

.hero-content {
  position: relative;
  z-index: 2;
  max-width: 720px;
}

.breadcrumb {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 14px;
  color: rgba(255, 255, 255, 0.72);
  margin-bottom: 16px;
}

.breadcrumb a {
  color: rgba(255, 255, 255, 0.72);
  transition: color 0.2s ease;
}

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

.breadcrumb-sep {
  display: inline-block;
  width: 4px;
  height: 4px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.5);
}

.page-hero h1 {
  font-size: clamp(2rem, 5vw, 3.2rem);
  font-weight: 700;
  line-height: 1.25;
  margin-bottom: 18px;
}

.page-hero .hero-sub {
  font-size: 1.125rem;
  line-height: 1.7;
  color: rgba(255, 255, 255, 0.88);
  max-width: 600px;
  margin-bottom: 32px;
}

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

.hero-actions .btn-outline {
  background: transparent;
  color: var(--white);
  border-color: rgba(255, 255, 255, 0.72);
}

.hero-actions .btn-outline:hover {
  background: rgba(255, 255, 255, 0.12);
  border-color: var(--white);
}

.hero-wave {
  position: absolute;
  bottom: -1px;
  left: 0;
  width: 100%;
  height: 60px;
  z-index: 2;
}

.hero-wave path {
  fill: var(--bg);
}

/* ===== Sections ===== */
.page-section {
  padding: var(--space-section) 0;
}

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

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

.section-head {
  text-align: center;
  max-width: 640px;
  margin: 0 auto 56px;
}

.section-head h2 {
  font-size: clamp(1.5rem, 3vw, 2.2rem);
  font-weight: 700;
  color: var(--text);
  line-height: 1.3;
  margin-bottom: 14px;
}

.section-head p {
  font-size: 1rem;
  color: var(--text-muted);
  line-height: 1.7;
}

/* ===== Features ===== */
.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}

.feature-card {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 36px 32px;
  box-shadow: var(--shadow);
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.feature-card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-hover);
}

.feature-icon {
  width: 56px;
  height: 56px;
  border-radius: 14px;
  background: var(--primary-light);
  color: var(--primary);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 22px;
}

.feature-icon svg {
  width: 28px;
  height: 28px;
}

.feature-card:nth-child(2) .feature-icon {
  background: rgba(217, 119, 6, 0.12);
  color: var(--accent);
}

.feature-card h3 {
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--text);
  margin-bottom: 10px;
}

.feature-card p {
  font-size: 0.95rem;
  color: var(--text-muted);
  line-height: 1.7;
}

/* ===== Scenario ===== */
.scenario-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 56px;
  align-items: center;
}

.scenario-image img {
  width: 100%;
  border-radius: 16px;
  border: 1px solid var(--border);
  box-shadow: var(--shadow);
  object-fit: cover;
  aspect-ratio: 4 / 3;
}

.scenario-content h2 {
  font-size: clamp(1.5rem, 3vw, 2.2rem);
  font-weight: 700;
  color: var(--text);
  line-height: 1.3;
  margin-bottom: 18px;
}

.scenario-content > p {
  font-size: 1rem;
  color: var(--text-muted);
  line-height: 1.75;
  margin-bottom: 24px;
}

.scenario-list li {
  position: relative;
  padding: 10px 0 10px 32px;
  font-size: 1rem;
  color: var(--text);
  line-height: 1.7;
}

.scenario-list li::before {
  content: "";
  position: absolute;
  left: 8px;
  top: 22px;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--primary);
  opacity: 0.6;
}

.scenario-list li::after {
  content: "";
  position: absolute;
  left: 11px;
  top: 30px;
  bottom: -2px;
  width: 2px;
  background: var(--border);
}

.scenario-list li:last-child::after {
  display: none;
}

/* ===== Steps ===== */
.steps-grid {
  display: grid;
  grid-template-columns: 1fr 48px 1fr 48px 1fr;
  align-items: stretch;
  gap: 0;
}

.step-card {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 36px 28px;
  text-align: center;
  box-shadow: var(--shadow);
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.step-card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-hover);
}

.step-badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: var(--accent);
  color: var(--white);
  font-size: 14px;
  font-weight: 700;
  margin-bottom: 20px;
}

.step-card h3 {
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--text);
  margin-bottom: 10px;
}

.step-card p {
  font-size: 0.95rem;
  color: var(--text-muted);
  line-height: 1.7;
}

.step-arrow {
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--primary);
  font-size: 1.6rem;
  font-weight: 300;
}

/* ===== Resource Cards ===== */
.resources-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
  margin-bottom: 40px;
}

.resource-card {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow);
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.resource-card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-hover);
}

.resource-thumb img {
  width: 100%;
  aspect-ratio: 16 / 9;
  object-fit: cover;
  border-bottom: 1px solid var(--border);
}

.resource-info {
  padding: 24px;
}

.resource-info h3 {
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--text);
  margin-bottom: 10px;
}

.resource-info p {
  font-size: 0.95rem;
  color: var(--text-muted);
  line-height: 1.7;
  margin-bottom: 18px;
}

.card-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--primary);
  transition: gap 0.25s ease;
}

.card-link:hover {
  gap: 12px;
}

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

/* ===== Pagination ===== */
.pagination {
  display: flex;
  justify-content: center;
  gap: 10px;
}

.page-link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 40px;
  height: 40px;
  padding: 0 10px;
  border-radius: 8px;
  background: var(--card-bg);
  border: 1px solid var(--border);
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--text-muted);
  transition: border-color 0.2s ease, color 0.2s ease, background 0.2s ease;
}

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

.page-link.current {
  background: var(--primary);
  border-color: var(--primary);
  color: var(--white);
}

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

.faq-item {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  margin-bottom: 14px;
  overflow: hidden;
  transition: border-color 0.2s ease;
}

.faq-item.active {
  border-color: rgba(217, 119, 6, 0.35);
}

.faq-question {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 20px 24px;
  font-size: 1.125rem;
  font-weight: 600;
  color: var(--text);
  text-align: left;
  transition: color 0.2s ease;
}

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

.faq-icon {
  position: relative;
  width: 28px;
  height: 28px;
  flex-shrink: 0;
  border-radius: 50%;
  background: var(--primary-light);
  transition: background 0.2s ease, transform 0.3s ease;
}

.faq-icon::before,
.faq-icon::after {
  content: "";
  position: absolute;
  top: 50%;
  left: 50%;
  width: 12px;
  height: 2px;
  background: var(--primary);
  border-radius: 2px;
  transform: translate(-50%, -50%);
  transition: background 0.2s ease;
}

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

.faq-item.active .faq-icon {
  transform: rotate(45deg);
  background: rgba(217, 119, 6, 0.12);
}

.faq-item.active .faq-icon::before,
.faq-item.active .faq-icon::after {
  background: var(--accent);
}

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

.faq-answer-inner {
  padding: 0 24px 20px;
  margin-left: 24px;
  border-left: 2px solid var(--primary);
  background: #F3F4F2;
  border-radius: 0 8px 8px 0;
  padding-left: 20px;
}

.faq-answer p {
  font-size: 0.95rem;
  color: var(--text-muted);
  line-height: 1.75;
}

/* ===== CTA ===== */
.cta-section {
  background: linear-gradient(135deg, #0F766E, #0B5D57);
  position: relative;
  overflow: hidden;
  padding: 88px 0;
}

.cta-section::before,
.cta-section::after {
  content: "";
  position: absolute;
  width: 320px;
  height: 320px;
  border-radius: 50%;
  border: 2px solid rgba(255, 255, 255, 0.06);
}

.cta-section::before {
  top: -120px;
  left: -80px;
}

.cta-section::after {
  bottom: -140px;
  right: -60px;
}

.cta-inner {
  position: relative;
  z-index: 2;
  text-align: center;
  max-width: 640px;
  margin: 0 auto;
}

.cta-inner h2 {
  font-size: clamp(1.75rem, 4vw, 2.2rem);
  font-weight: 700;
  color: var(--white);
  margin-bottom: 14px;
}

.cta-inner p {
  font-size: 1rem;
  color: rgba(255, 255, 255, 0.8);
  line-height: 1.7;
  margin-bottom: 32px;
}

/* ===== Footer ===== */
.site-footer {
  background: #142824;
  color: var(--white);
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr;
  gap: 48px;
  padding: 60px 0 48px;
}

.footer-brand .footer-logo {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-size: 1.25rem;
  font-weight: 700;
  margin-bottom: 18px;
  color: var(--white);
}

.footer-brand .brand-mark {
  width: 32px;
  height: 32px;
  border-radius: 9px;
}

.footer-brand .brand-mark svg {
  width: 20px;
  height: 20px;
}

.footer-brand p {
  font-size: 0.925rem;
  color: rgba(255, 255, 255, 0.7);
  line-height: 1.7;
  max-width: 320px;
}

.footer-col h4 {
  font-size: 1rem;
  font-weight: 600;
  color: var(--white);
  margin-bottom: 18px;
}

.footer-col a {
  display: block;
  font-size: 0.925rem;
  color: rgba(255, 255, 255, 0.7);
  padding: 6px 0;
  transition: color 0.2s ease, padding-left 0.2s ease;
}

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

.footer-col p {
  font-size: 0.925rem;
  color: rgba(255, 255, 255, 0.7);
  line-height: 1.8;
}

.footer-bottom {
  background: #0F1F1D;
  border-top: 1px solid rgba(255, 255, 255, 0.06);
  padding: 18px 0;
}

.footer-bottom .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 8px;
}

.footer-bottom p {
  font-size: 0.875rem;
  color: rgba(255, 255, 255, 0.6);
}

/* ===== Responsive ===== */
@media (max-width: 992px) {
  .page-section {
    padding: 72px 0;
  }

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

  .scenario-grid {
    grid-template-columns: 1fr;
    gap: 36px;
  }

  .steps-grid {
    grid-template-columns: 1fr;
    gap: 16px;
    max-width: 480px;
    margin: 0 auto;
  }

  .step-arrow {
    transform: rotate(90deg);
    padding: 4px 0;
  }

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

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

  .footer-brand {
    grid-column: 1 / -1;
  }
}

@media (max-width: 768px) {
  .header-inner {
    grid-template-columns: 1fr auto 1fr;
    min-height: 64px;
  }

  .nav-left,
  .nav-right {
    display: none;
  }

  .nav-toggle {
    display: flex;
    grid-column: 1;
    justify-self: start;
  }

  .brand-logo {
    grid-column: 2;
  }

  .page-hero {
    padding: 96px 0 120px;
  }

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

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

  .section-head {
    margin-bottom: 40px;
  }

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

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

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

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

@media (max-width: 576px) {
  .container {
    padding: 0 18px;
  }

  .hero-actions {
    flex-direction: column;
  }

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

  .step-card {
    padding: 28px 20px;
  }

  .resource-info {
    padding: 20px;
  }

  .faq-question {
    padding: 16px 18px;
    font-size: 1rem;
  }

  .faq-answer-inner {
    margin-left: 16px;
    padding-left: 16px;
  }
}

/* roulang page: article */
:root {
  --primary: #0F766E;
  --primary-dark: #0B5D57;
  --primary-soft: rgba(15, 118, 110, 0.08);
  --accent: #D97706;
  --accent-dark: #B25E00;
  --bg: #F8F7F4;
  --card: #FFFFFF;
  --border: #E7E5E0;
  --text: #1C2B2A;
  --text-weak: #64706E;
  --text-invert: #FFFFFF;
  --radius: 14px;
  --radius-sm: 10px;
  --shadow: 0 2px 10px rgba(28, 43, 42, 0.06);
  --shadow-lg: 0 6px 20px rgba(28, 43, 42, 0.12);
  --font-sans: "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
  --container: 1140px;
  --spacer: 96px;
}

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

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: var(--font-sans);
  font-size: 1rem;
  line-height: 1.75;
  color: var(--text);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3, h4, h5, h6 {
  line-height: 1.3;
  margin: 0 0 0.5em;
  color: var(--text);
  font-weight: 700;
}

p {
  margin: 0 0 1em;
}

a {
  color: var(--primary);
  text-decoration: none;
  transition: color .2s ease, background .2s ease, border-color .2s ease, box-shadow .2s ease, transform .2s ease;
}

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

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

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

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

input, textarea {
  font-family: inherit;
}

.container {
  width: 100%;
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 24px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-size: 1rem;
  font-weight: 600;
  padding: 0.9em 2em;
  border-radius: var(--radius-sm);
  transition: all .25s ease;
  border: 2px solid transparent;
  line-height: 1.2;
}

.btn-cta {
  background: var(--accent);
  color: var(--text-invert);
}

.btn-cta:hover {
  background: var(--accent-dark);
  color: var(--text-invert);
  box-shadow: 0 4px 14px rgba(217, 119, 6, 0.35);
  transform: translateY(-1px);
}

.btn-cta:focus {
  outline: none;
  box-shadow: 0 0 0 3px rgba(217, 119, 6, 0.3);
}

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

.btn-outline:hover {
  background: rgba(15, 118, 110, 0.05);
  color: var(--primary);
}

.btn-outline:focus {
  outline: none;
  box-shadow: 0 0 0 3px rgba(15, 118, 110, 0.15);
}

.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border);
}

.header-inner {
  display: flex;
  align-items: center;
  height: 72px;
}

.nav-left {
  flex: 1;
  display: flex;
  align-items: center;
  gap: 4px;
}

.nav-right {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 4px;
}

.brand-logo {
  flex-shrink: 0;
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--text);
  margin: 0 24px;
  transition: opacity .2s ease;
}

.brand-logo:hover {
  opacity: 0.85;
  color: var(--text);
}

.brand-mark {
  width: 40px;
  height: 40px;
  border-radius: 12px;
  background: var(--primary);
  color: var(--text-invert);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.brand-mark svg {
  width: 24px;
  height: 24px;
}

.nav-link {
  padding: 8px 16px;
  font-size: 16px;
  font-weight: 500;
  color: var(--text);
  border-radius: 999px;
  transition: all .2s ease;
  position: relative;
}

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

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

.nav-link.btn-nav-cta {
  background: var(--accent);
  color: var(--text-invert);
  border-radius: var(--radius-sm);
  padding: 8px 20px;
  font-weight: 600;
}

.nav-link.btn-nav-cta:hover {
  background: var(--accent-dark);
  color: var(--text-invert);
  box-shadow: 0 4px 14px rgba(217, 119, 6, 0.3);
}

.nav-toggle {
  display: none;
  width: 40px;
  height: 40px;
  border-radius: var(--radius-sm);
  align-items: center;
  justify-content: center;
  flex-direction: column;
  gap: 5px;
  background: var(--primary-soft);
  transition: background .2s ease;
}

.nav-toggle span {
  display: block;
  width: 18px;
  height: 2px;
  background: var(--text);
  border-radius: 2px;
  transition: transform .2s ease, opacity .2s ease;
}

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

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

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

.mobile-nav {
  display: none;
  position: absolute;
  top: 100%;
  left: 0;
  right: 0;
  background: var(--card);
  border-bottom: 1px solid var(--border);
  padding: 16px 24px 24px;
  box-shadow: 0 12px 30px rgba(28, 43, 42, 0.08);
  flex-direction: column;
  gap: 4px;
}

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

.mobile-nav-link {
  display: block;
  padding: 12px 16px;
  font-size: 1rem;
  font-weight: 500;
  color: var(--text);
  border-radius: var(--radius-sm);
  transition: background .2s ease, color .2s ease;
}

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

.mobile-nav-link.btn-mobile-cta {
  background: var(--accent);
  color: var(--text-invert);
  text-align: center;
  font-weight: 600;
  margin-top: 8px;
}

.mobile-nav-link.btn-mobile-cta:hover {
  background: var(--accent-dark);
  color: var(--text-invert);
}

.site-main {
  padding-top: 72px;
}

.article-hero {
  background: var(--bg);
  padding: 56px 0 48px;
  border-bottom: 1px solid var(--border);
}

.breadcrumb {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 6px;
  font-size: 0.875rem;
  color: var(--text-weak);
  margin-bottom: 20px;
}

.breadcrumb a {
  color: var(--text-weak);
  transition: color .2s ease;
}

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

.breadcrumb-sep {
  color: #B9BDB9;
  font-size: 14px;
}

.breadcrumb-current {
  color: var(--text);
  font-weight: 500;
  max-width: 420px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.article-hero-title {
  font-size: clamp(1.6rem, 4vw, 2.6rem);
  line-height: 1.25;
  font-weight: 700;
  margin-bottom: 16px;
  max-width: 860px;
  color: var(--text);
}

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

.article-date {
  font-size: 0.875rem;
  color: var(--text-weak);
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.article-date svg {
  width: 15px;
  height: 15px;
}

.article-tag {
  display: inline-flex;
  align-items: center;
  padding: 4px 14px;
  font-size: 0.825rem;
  font-weight: 500;
  color: var(--primary);
  background: rgba(15, 118, 110, 0.1);
  border-radius: 999px;
  transition: background .2s ease, color .2s ease;
}

.article-tag:hover {
  background: rgba(15, 118, 110, 0.18);
  color: var(--primary-dark);
}

.article-section {
  padding: 64px 0 80px;
}

.article-card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 48px 56px;
  max-width: 860px;
  margin: 0 auto;
}

.article-body {
  font-size: 1rem;
  line-height: 1.75;
  color: var(--text);
}

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

.article-body p {
  margin-bottom: 1.2em;
  text-indent: 2em;
}

.article-body h2 {
  font-size: 1.5rem;
  font-weight: 700;
  margin: 1.6em 0 0.7em;
  padding-top: 0.2em;
  color: var(--text);
}

.article-body h3 {
  font-size: 1.2rem;
  font-weight: 600;
  margin: 1.4em 0 0.6em;
  color: var(--text);
}

.article-body ul {
  list-style: disc;
  padding-left: 1.6em;
  margin: 1em 0 1.2em;
}

.article-body ol {
  list-style: decimal;
  padding-left: 1.6em;
  margin: 1em 0 1.2em;
}

.article-body li {
  margin-bottom: 0.45em;
}

.article-body blockquote {
  border-left: 3px solid var(--primary);
  background: #F3F4F2;
  padding: 14px 20px;
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  margin: 1.5em 0;
  color: var(--text-weak);
  font-style: normal;
}

.article-body blockquote p {
  text-indent: 0;
  margin-bottom: 0;
}

.article-body img {
  border-radius: 12px;
  margin: 1.5em auto;
  border: 1px solid var(--border);
}

.article-body a {
  color: var(--primary);
  font-weight: 500;
  border-bottom: 1px solid rgba(15, 118, 110, 0.3);
}

.article-body a:hover {
  border-bottom-color: var(--primary);
}

.post-pager {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
  margin-top: 48px;
  padding-top: 32px;
  border-top: 1px solid var(--border);
}

.pager-link {
  display: flex;
  flex-direction: column;
  padding: 20px 24px;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  transition: all .25s ease;
}

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

.pager-link.pager-next {
  text-align: right;
  align-items: flex-end;
}

.pager-direction {
  font-size: 0.85rem;
  color: var(--text-weak);
  margin-bottom: 4px;
}

.pager-title {
  font-size: 1rem;
  font-weight: 600;
  color: var(--text);
  max-width: 320px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.related-section {
  padding: 64px 0 40px;
}

.section-head {
  text-align: center;
  margin-bottom: 48px;
}

.section-title {
  font-size: clamp(1.5rem, 3vw, 2.2rem);
  font-weight: 700;
  color: var(--text);
  margin-bottom: 8px;
}

.section-subtitle {
  color: var(--text-weak);
  font-size: 1rem;
}

.related-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.related-card {
  display: block;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow);
  transition: all .3s ease;
}

.related-card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-lg);
}

.related-card:hover .related-thumb img {
  transform: scale(1.05);
}

.related-thumb {
  aspect-ratio: 16 / 9;
  overflow: hidden;
  background: #EDEBE6;
}

.related-thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform .4s ease;
}

.related-body {
  padding: 20px 24px 24px;
}

.related-body h3 {
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--text);
  margin-bottom: 8px;
  transition: color .2s ease;
}

.related-card:hover .related-body h3 {
  color: var(--primary);
}

.related-body p {
  font-size: 0.9rem;
  color: var(--text-weak);
  line-height: 1.6;
  margin: 0;
}

.cta-section {
  background: linear-gradient(135deg, #0F766E, #0B5D57);
  padding: 80px 0;
  margin-top: 72px;
  position: relative;
  overflow: hidden;
}

.cta-section::before {
  content: "";
  position: absolute;
  top: -60px;
  right: -60px;
  width: 280px;
  height: 280px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.04);
}

.cta-section::after {
  content: "";
  position: absolute;
  bottom: -80px;
  left: -40px;
  width: 240px;
  height: 240px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.03);
}

.cta-inner {
  position: relative;
  z-index: 1;
  text-align: center;
  max-width: 620px;
  margin: 0 auto;
}

.cta-title {
  font-size: 2rem;
  font-weight: 700;
  color: var(--text-invert);
  margin-bottom: 12px;
}

.cta-subtitle {
  font-size: 1rem;
  color: rgba(255, 255, 255, 0.8);
  margin-bottom: 28px;
  line-height: 1.7;
}

.site-footer {
  background: #142824;
  color: rgba(255, 255, 255, 0.7);
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: 48px;
  padding: 64px 0 40px;
}

.footer-brand p {
  color: rgba(255, 255, 255, 0.7);
  font-size: 0.9rem;
  max-width: 320px;
  line-height: 1.7;
  margin-top: 16px;
}

.footer-logo {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: var(--text-invert);
  font-size: 1.25rem;
  font-weight: 700;
}

.footer-logo:hover {
  color: var(--text-invert);
  opacity: 0.9;
}

.footer-logo .brand-mark {
  background: var(--accent);
}

.footer-col h4 {
  color: var(--text-invert);
  font-size: 1rem;
  font-weight: 600;
  margin-bottom: 16px;
}

.footer-col a,
.footer-col p {
  display: block;
  color: rgba(255, 255, 255, 0.7);
  font-size: 0.9rem;
  margin-bottom: 8px;
  line-height: 1.6;
}

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

.footer-bottom {
  background: #0F1F1D;
  padding: 20px 0;
}

.footer-bottom .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
}

.footer-bottom p {
  margin: 0;
  color: rgba(255, 255, 255, 0.6);
  font-size: 0.85rem;
}

.not-found-section {
  padding: 100px 0 120px;
  text-align: center;
}

.not-found-card {
  display: inline-block;
  padding: 56px 72px;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  max-width: 520px;
}

.not-found-icon {
  width: 64px;
  height: 64px;
  border-radius: 50%;
  background: var(--primary-soft);
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 20px;
  color: var(--primary);
}

.not-found-icon svg {
  width: 30px;
  height: 30px;
}

.not-found-card h2 {
  font-size: 1.5rem;
  font-weight: 700;
  margin-bottom: 8px;
}

.not-found-card p {
  color: var(--text-weak);
  margin-bottom: 24px;
}

@media (max-width: 992px) {
  .related-grid {
    grid-template-columns: repeat(3, 1fr);
    gap: 16px;
  }

  .related-body {
    padding: 16px 18px 20px;
  }

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

  .footer-brand {
    grid-column: 1 / -1;
  }
}

@media (max-width: 768px) {
  .nav-left,
  .nav-right {
    display: none;
  }

  .nav-toggle {
    display: flex;
  }

  .header-inner {
    height: 64px;
    position: relative;
  }

  .brand-logo {
    position: absolute;
    left: 50%;
    transform: translateX(-50%);
    margin: 0;
    font-size: 1.1rem;
  }

  .site-main {
    padding-top: 64px;
  }

  .article-hero {
    padding: 36px 0 32px;
  }

  .article-card {
    padding: 32px 24px;
  }

  .article-body p {
    text-indent: 2em;
  }

  .article-hero-title {
    font-size: 1.5rem;
  }

  .related-grid {
    grid-template-columns: 1fr;
    max-width: 460px;
    margin: 0 auto;
  }

  .post-pager {
    grid-template-columns: 1fr;
    gap: 12px;
  }

  .cta-section {
    padding: 64px 0;
    margin-top: 56px;
  }

  .cta-title {
    font-size: 1.6rem;
  }

  .footer-grid {
    grid-template-columns: 1fr;
    padding: 48px 0 24px;
    gap: 24px;
  }

  .footer-brand p {
    max-width: 100%;
  }

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

  .not-found-card {
    padding: 40px 28px;
    max-width: 90%;
  }
}

@media (max-width: 576px) {
  .container {
    padding: 0 16px;
  }

  .article-hero-title {
    font-size: 1.35rem;
  }

  .article-meta {
    gap: 8px;
  }

  .article-card {
    padding: 24px 20px;
    border-radius: 12px;
  }

  .related-body h3 {
    font-size: 1rem;
  }

  .btn {
    width: 100%;
  }

  .cta-inner .btn {
    width: auto;
    min-width: 200px;
  }
}