/* roulang page: index */
/* ========== Variables ========== */
:root {
  --color-primary: #EA580C;
  --color-primary-light: #F59E0B;
  --color-primary-dark: #C2410C;
  --color-gradient: linear-gradient(135deg, #F59E0B 0%, #EA580C 100%);
  --color-accent: #0F766E;
  --color-heading: #1F2937;
  --color-body: #374151;
  --color-muted: #6B7280;
  --color-bg: #FAF6F0;
  --color-surface: #FFFFFF;
  --color-surface-soft: #F3EDE4;
  --color-border: #E5D9C8;
  --radius-lg: 20px;
  --radius-md: 14px;
  --radius-sm: 12px;
  --radius-pill: 999px;
  --shadow-sm: 0 10px 30px rgba(160, 80, 30, 0.08);
  --shadow-lg: 0 16px 40px rgba(160, 80, 30, 0.14);
  --font-main: -apple-system, "PingFang SC", "HarmonyOS Sans SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
  --space-section: clamp(56px, 8vw, 96px);
}

/* ========== Reset & Base ========== */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}
html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}
body {
  font-family: var(--font-main);
  font-size: 16px;
  line-height: 1.75;
  color: var(--color-body);
  background-color: var(--color-bg);
  font-feature-settings: "tnum";
  -webkit-font-smoothing: antialiased;
}
img {
  max-width: 100%;
  display: block;
}
a {
  text-decoration: none;
  color: inherit;
  transition: color 0.2s ease;
}
ul, ol {
  list-style: none;
}
button, input, textarea, select {
  font-family: inherit;
  font-size: inherit;
  border: none;
  outline: none;
  background: none;
}
:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 3px;
  border-radius: 4px;
}

/* ========== Container ========== */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding-left: 20px;
  padding-right: 20px;
}

/* ========== Buttons ========== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 24px;
  border-radius: var(--radius-sm);
  font-weight: 600;
  font-size: 15px;
  line-height: 1.4;
  cursor: pointer;
  transition: all 0.25s ease;
  border: 1px solid transparent;
  white-space: nowrap;
}
.btn-primary {
  background: var(--color-gradient);
  color: #fff;
  box-shadow: var(--shadow-sm);
}
.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
}
.btn-primary:active {
  transform: translateY(0);
  box-shadow: var(--shadow-sm);
}
.btn-secondary {
  background: var(--color-surface);
  color: var(--color-primary);
  border-color: var(--color-border);
}
.btn-secondary:hover {
  border-color: var(--color-primary);
  background: var(--color-surface-soft);
}
.btn-light {
  background: #fff;
  color: var(--color-primary-dark);
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.12);
}
.btn-light:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.18);
}
.btn-lg {
  padding: 14px 34px;
  font-size: 16px;
}
.btn-sm {
  padding: 8px 18px;
  font-size: 14px;
}

/* ========== Badges ========== */
.badge {
  display: inline-flex;
  align-items: center;
  padding: 4px 14px;
  border-radius: var(--radius-pill);
  font-size: 13px;
  font-weight: 600;
  background: var(--color-surface-soft);
  color: var(--color-primary-dark);
}
.badge-accent {
  background: rgba(15, 118, 110, 0.1);
  color: var(--color-accent);
}

/* ========== Header & Nav ========== */
.site-header {
  padding: 20px 0 10px;
  position: relative;
  z-index: 100;
}
.nav-panel {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 12px 20px;
  box-shadow: var(--shadow-sm);
  flex-wrap: wrap;
}
.logo {
  font-size: 22px;
  font-weight: 800;
  letter-spacing: 0.5px;
  background: var(--color-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  white-space: nowrap;
}
.nav-toggle {
  display: none;
  width: 42px;
  height: 42px;
  border-radius: 10px;
  background: var(--color-surface-soft);
  cursor: pointer;
  align-items: center;
  justify-content: center;
  font-size: 20px;
  color: var(--color-heading);
  transition: background 0.2s;
}
.nav-toggle:hover {
  background: #e9ded0;
}
.nav-links {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
}
.nav-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 16px;
  border-radius: var(--radius-pill);
  background: var(--color-surface-soft);
  color: var(--color-body);
  font-weight: 500;
  font-size: 14px;
  transition: all 0.25s ease;
}
.nav-link:hover {
  background: rgba(234, 88, 12, 0.1);
  color: var(--color-primary);
  transform: translateY(-2px);
}
.nav-link.active {
  background: rgba(234, 88, 12, 0.12);
  color: var(--color-primary-dark);
  font-weight: 600;
}
.nav-link svg {
  width: 16px;
  height: 16px;
  flex-shrink: 0;
}
.nav-cta {
  flex-shrink: 0;
}

/* ========== Hero ========== */
.hero {
  position: relative;
  background-image: url('/assets/images/backpic/back-1.jpg');
  background-size: cover;
  background-position: center;
  border-radius: var(--radius-lg);
  margin-top: 20px;
  overflow: hidden;
  min-height: 540px;
  display: flex;
  align-items: center;
}
.hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(245, 158, 11, 0.88) 0%, rgba(234, 88, 12, 0.84) 60%, rgba(194, 65, 12, 0.88) 100%);
  z-index: 1;
}
.hero-content {
  position: relative;
  z-index: 2;
  padding: 60px 20px;
  max-width: 720px;
  color: #fff;
}
.hero h1 {
  font-size: clamp(30px, 5vw, 44px);
  font-weight: 800;
  line-height: 1.25;
  margin-bottom: 18px;
  color: #fff;
  letter-spacing: 1px;
}
.hero-subtitle {
  font-size: 17px;
  line-height: 1.7;
  color: rgba(255, 255, 255, 0.92);
  margin-bottom: 30px;
  max-width: 520px;
}
.hero-data {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-bottom: 30px;
}
.data-badge {
  background: rgba(255, 255, 255, 0.18);
  backdrop-filter: blur(6px);
  border: 1px solid rgba(255, 255, 255, 0.25);
  border-radius: var(--radius-pill);
  padding: 10px 20px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 2px;
  min-width: 100px;
}
.data-num {
  font-size: 24px;
  font-weight: 800;
  line-height: 1.2;
  color: #fff;
}
.data-label {
  font-size: 13px;
  color: rgba(255, 255, 255, 0.85);
  text-align: center;
}
.hero-actions {
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
}

/* ========== Section Common ========== */
.section {
  padding: var(--space-section) 0;
}
.section + .section {
  padding-top: 0;
}
.section-head {
  margin-bottom: 40px;
  max-width: 640px;
}
.section-head h2 {
  font-size: clamp(22px, 3vw, 30px);
  font-weight: 700;
  line-height: 1.3;
  color: var(--color-heading);
  margin-bottom: 12px;
}
.section-head p {
  font-size: 15px;
  color: var(--color-muted);
  line-height: 1.7;
}
.section-head .tag-line {
  display: inline-block;
  padding: 4px 16px;
  background: rgba(234, 88, 12, 0.1);
  color: var(--color-primary-dark);
  border-radius: var(--radius-pill);
  font-size: 13px;
  font-weight: 600;
  margin-bottom: 14px;
}

/* ========== Pain Section ========== */
.pain-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
}
.note-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-left: 3px solid var(--color-primary);
  border-radius: var(--radius-md);
  padding: 30px 28px;
  box-shadow: var(--shadow-sm);
  transition: all 0.3s ease;
  position: relative;
}
.note-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
}
.note-number {
  display: inline-block;
  font-size: 13px;
  font-weight: 700;
  color: var(--color-primary);
  background: rgba(234, 88, 12, 0.08);
  padding: 3px 12px;
  border-radius: var(--radius-pill);
  margin-bottom: 16px;
  letter-spacing: 0.5px;
}
.note-card h3 {
  font-size: 18px;
  font-weight: 700;
  color: var(--color-heading);
  margin-bottom: 10px;
}
.note-card p {
  font-size: 15px;
  color: var(--color-body);
  line-height: 1.7;
}

/* ========== Solution Section ========== */
.solution-steps {
  display: flex;
  flex-direction: column;
  gap: 32px;
  max-width: 860px;
  margin: 0 auto;
}
.step-card {
  display: flex;
  gap: 28px;
  align-items: flex-start;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 32px 36px;
  box-shadow: var(--shadow-sm);
  transition: all 0.3s ease;
  position: relative;
}
.step-card:hover {
  box-shadow: var(--shadow-lg);
  transform: translateY(-2px);
}
.step-num {
  flex-shrink: 0;
  width: 64px;
  height: 64px;
  border-radius: var(--radius-md);
  background: var(--color-gradient);
  color: #fff;
  font-size: 24px;
  font-weight: 800;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: var(--shadow-sm);
}
.step-body {
  flex: 1;
}
.step-body h3 {
  font-size: 19px;
  font-weight: 700;
  color: var(--color-heading);
  margin-bottom: 8px;
}
.step-body p {
  font-size: 15px;
  color: var(--color-body);
  line-height: 1.75;
}
.step-img {
  border-radius: var(--radius-md);
  overflow: hidden;
  margin-top: 14px;
  box-shadow: var(--shadow-sm);
}
.step-img img {
  width: 100%;
  height: 180px;
  object-fit: cover;
}

/* ========== Results Section ========== */
.results-section {
  background: var(--color-heading);
  border-radius: var(--radius-lg);
  margin: var(--space-section) auto;
  position: relative;
  overflow: hidden;
}
.results-section::before {
  content: '';
  position: absolute;
  top: -80px;
  right: -80px;
  width: 200px;
  height: 200px;
  background: rgba(245, 158, 11, 0.15);
  border-radius: 50%;
}
.results-section .container {
  padding: clamp(48px, 7vw, 80px) 20px;
}
.results-section .section-head h2 {
  color: #fff;
}
.results-section .section-head p {
  color: rgba(255, 255, 255, 0.7);
}
.results-grid {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 20px;
  margin-top: 36px;
}
.result-item {
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: var(--radius-md);
  padding: 26px 16px;
  text-align: center;
  transition: all 0.3s ease;
}
.result-item:hover {
  background: rgba(255, 255, 255, 0.14);
  transform: translateY(-3px);
}
.result-num {
  display: block;
  font-size: 30px;
  font-weight: 800;
  color: #fff;
  line-height: 1.2;
  margin-bottom: 6px;
}
.result-label {
  font-size: 14px;
  color: rgba(255, 255, 255, 0.75);
}

/* ========== Testimonials ========== */
.testimonial-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.testimonial-card {
  background: var(--color-surface-soft);
  border-left: 4px solid var(--color-accent);
  border-radius: var(--radius-md);
  padding: 28px 26px;
  position: relative;
  transition: all 0.3s ease;
}
.testimonial-card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-sm);
}
.testimonial-card::before {
  content: '"';
  position: absolute;
  top: 8px;
  right: 18px;
  font-size: 60px;
  font-family: Georgia, serif;
  color: rgba(15, 118, 110, 0.18);
  line-height: 1;
}
.testimonial-card p {
  font-size: 15px;
  color: var(--color-body);
  line-height: 1.75;
  margin-bottom: 18px;
  font-style: normal;
}
.testimonial-card cite {
  display: block;
  font-style: normal;
  font-size: 14px;
  font-weight: 600;
  color: var(--color-accent);
}

/* ========== Topics ========== */
.topics-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}
.topic-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 24px 22px;
  box-shadow: var(--shadow-sm);
  transition: all 0.3s ease;
  cursor: pointer;
}
.topic-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
  border-color: rgba(234, 88, 12, 0.3);
}
.topic-icon {
  width: 46px;
  height: 46px;
  border-radius: 12px;
  background: var(--color-gradient);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 22px;
  margin-bottom: 16px;
}
.topic-card h3 {
  font-size: 16px;
  font-weight: 700;
  color: var(--color-heading);
  margin-bottom: 8px;
}
.topic-card p {
  font-size: 14px;
  color: var(--color-muted);
  line-height: 1.6;
}

/* ========== News / CMS ========== */
.news-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
}
.news-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  transition: all 0.3s ease;
}
.news-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
}
.news-card__inner {
  display: flex;
  height: 100%;
  text-decoration: none;
}
.news-card__thumb {
  width: 42%;
  min-width: 150px;
  position: relative;
  overflow: hidden;
}
.news-card__thumb img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.4s ease;
}
.news-card:hover .news-card__thumb img {
  transform: scale(1.05);
}
.news-card__content {
  flex: 1;
  padding: 22px 20px;
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.news-card__cat {
  display: inline-block;
  align-self: flex-start;
  padding: 3px 12px;
  border-radius: var(--radius-pill);
  background: rgba(15, 118, 110, 0.1);
  color: var(--color-accent);
  font-size: 13px;
  font-weight: 600;
}
.news-card__content h3 {
  font-size: 16px;
  font-weight: 700;
  color: var(--color-heading);
  line-height: 1.4;
  transition: color 0.2s;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.news-card:hover .news-card__content h3 {
  color: var(--color-primary);
}
.news-card__content p {
  font-size: 14px;
  color: var(--color-muted);
  line-height: 1.6;
  display: -webkit-box;
  -webkit-line-clamp: 1;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.news-card__meta {
  margin-top: auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 13px;
  color: var(--color-muted);
  padding-top: 10px;
  border-top: 1px solid var(--color-border);
}
.news-card__more {
  color: var(--color-primary);
  font-weight: 600;
  transition: all 0.2s;
}
.news-card:hover .news-card__more {
  letter-spacing: 0.5px;
}
.empty-state {
  grid-column: 1 / -1;
  text-align: center;
  padding: 60px 20px;
  background: var(--color-surface);
  border: 1px dashed var(--color-border);
  border-radius: var(--radius-md);
  color: var(--color-muted);
  font-size: 16px;
}

/* ========== FAQ ========== */
.faq-list {
  max-width: 860px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 14px;
}
.faq-item {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: all 0.3s ease;
}
.faq-item.active {
  border-color: var(--color-primary);
  box-shadow: var(--shadow-sm);
}
.faq-question {
  width: 100%;
  text-align: left;
  padding: 20px 26px;
  font-size: 16px;
  font-weight: 600;
  color: var(--color-heading);
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  transition: all 0.2s;
  background: transparent;
}
.faq-question:hover {
  background: var(--color-surface-soft);
}
.faq-item.active .faq-question {
  color: var(--color-primary);
}
.faq-arrow {
  font-size: 20px;
  color: var(--color-muted);
  transition: transform 0.3s ease;
  flex-shrink: 0;
}
.faq-item.active .faq-arrow {
  transform: rotate(180deg);
  color: var(--color-primary);
}
.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.35s ease;
}
.faq-answer p {
  padding: 0 26px 22px;
  font-size: 15px;
  color: var(--color-body);
  line-height: 1.75;
}

/* ========== CTA Section ========== */
.cta-section {
  padding-top: 0;
}
.cta-card {
  background: var(--color-gradient);
  border-radius: var(--radius-lg);
  padding: clamp(40px, 7vw, 72px) clamp(24px, 5vw, 60px);
  text-align: center;
  position: relative;
  overflow: hidden;
  box-shadow: var(--shadow-lg);
}
.cta-card::before {
  content: '';
  position: absolute;
  top: -40px;
  left: -40px;
  width: 140px;
  height: 140px;
  background: rgba(255, 255, 255, 0.1);
  border-radius: 50%;
}
.cta-card::after {
  content: '';
  position: absolute;
  bottom: -60px;
  right: -60px;
  width: 180px;
  height: 180px;
  background: rgba(255, 255, 255, 0.08);
  border-radius: 50%;
}
.cta-card h2 {
  font-size: clamp(22px, 3vw, 30px);
  font-weight: 800;
  color: #fff;
  margin-bottom: 12px;
  line-height: 1.3;
  position: relative;
  z-index: 1;
}
.cta-card p {
  font-size: 15px;
  color: rgba(255, 255, 255, 0.92);
  margin-bottom: 28px;
  max-width: 520px;
  margin-left: auto;
  margin-right: auto;
  position: relative;
  z-index: 1;
}
.cta-card .btn {
  position: relative;
  z-index: 1;
}

/* ========== Footer ========== */
.site-footer {
  background: #1F2937;
  color: rgba(255, 255, 255, 0.75);
  margin-top: var(--space-section);
  padding: 60px 0 30px;
}
.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: 40px;
  margin-bottom: 40px;
}
.footer-brand .footer-logo {
  font-size: 24px;
  font-weight: 800;
  color: #fff;
  display: block;
  margin-bottom: 12px;
}
.footer-brand p {
  font-size: 14px;
  line-height: 1.7;
  color: rgba(255, 255, 255, 0.6);
  max-width: 360px;
}
.footer-title {
  font-size: 15px;
  font-weight: 700;
  color: #fff;
  margin-bottom: 16px;
  letter-spacing: 0.5px;
}
.footer-links {
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.footer-links a {
  font-size: 14px;
  color: rgba(255, 255, 255, 0.65);
  transition: color 0.2s;
}
.footer-links a:hover {
  color: var(--color-primary-light);
}
.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  padding-top: 24px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
}
.footer-bottom p {
  font-size: 13px;
  color: rgba(255, 255, 255, 0.45);
}
.footer-domain {
  color: var(--color-primary-light);
}

/* ========== Responsive ========== */
@media (max-width: 991px) {
  .results-grid {
    grid-template-columns: repeat(3, 1fr);
  }
  .testimonial-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .topics-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .news-grid {
    grid-template-columns: 1fr;
  }
  .footer-grid {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 767px) {
  .nav-panel {
    padding: 12px 16px;
  }
  .nav-toggle {
    display: flex;
  }
  .nav-links {
    display: none;
    width: 100%;
    flex-direction: column;
    align-items: stretch;
    gap: 8px;
    padding-top: 10px;
  }
  .nav-panel.nav-open .nav-links {
    display: flex;
  }
  .nav-link {
    justify-content: center;
    padding: 12px 16px;
  }
  .nav-cta {
    margin-left: auto;
  }
  .hero {
    min-height: auto;
    border-radius: var(--radius-md);
  }
  .hero-content {
    padding: 44px 20px;
  }
  .hero h1 {
    font-size: 28px;
  }
  .hero-subtitle {
    font-size: 15px;
  }
  .hero-data {
    flex-wrap: nowrap;
    overflow-x: auto;
    padding-bottom: 6px;
    margin-bottom: 24px;
  }
  .data-badge {
    flex-shrink: 0;
    min-width: 88px;
  }
  .pain-grid {
    grid-template-columns: 1fr;
  }
  .step-card {
    flex-direction: column;
    padding: 24px;
  }
  .results-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .testimonial-grid {
    grid-template-columns: 1fr;
  }
  .topics-grid {
    grid-template-columns: 1fr;
  }
  .news-card__inner {
    flex-direction: column;
  }
  .news-card__thumb {
    width: 100%;
    height: 180px;
    position: relative;
  }
  .news-card__thumb img {
    position: absolute;
  }
  .footer-grid {
    grid-template-columns: 1fr;
    gap: 28px;
  }
  .footer-bottom {
    flex-direction: column;
    text-align: center;
  }
}

@media (max-width: 520px) {
  .container {
    padding-left: 16px;
    padding-right: 16px;
  }
  .nav-cta .btn {
    padding: 8px 14px;
    font-size: 13px;
  }
  .logo {
    font-size: 18px;
  }
  .results-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .cta-card {
    padding: 36px 20px;
  }
}

/* roulang page: article */
:root {
        --color-primary: #EA580C;
        --color-primary-light: #F59E0B;
        --color-primary-dark: #C2410C;
        --color-gradient: linear-gradient(135deg, #F59E0B 0%, #EA580C 100%);
        --color-accent: #0F766E;
        --color-heading: #1F2937;
        --color-body: #374151;
        --color-muted: #6B7280;
        --color-bg: #FAF6F0;
        --color-surface: #FFFFFF;
        --color-surface-soft: #F3EDE4;
        --color-border: #E5D9C8;
        --radius-lg: 20px;
        --radius-md: 14px;
        --radius-sm: 12px;
        --shadow-sm: 0 10px 30px rgba(160, 80, 30, 0.08);
        --shadow-md: 0 16px 40px rgba(160, 80, 30, 0.14);
        --spacing-section: clamp(56px, 8vw, 96px);
        --font-family: -apple-system, "PingFang SC", "HarmonyOS Sans SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
    }

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

    html {
        scroll-behavior: smooth;
    }

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

    a {
        color: var(--color-primary);
        text-decoration: none;
        transition: color 0.2s ease;
    }

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

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

    ul,
    ol {
        list-style: none;
    }

    button,
    input {
        font-family: inherit;
        font-size: inherit;
    }

    .container {
        max-width: 1200px;
        margin: 0 auto;
        padding-left: 20px;
        padding-right: 20px;
    }

    .site-header {
        padding: 20px 0 4px;
        position: sticky;
        top: 0;
        z-index: 100;
        background: rgba(250, 246, 240, 0.9);
        backdrop-filter: blur(10px);
        border-bottom: 1px solid rgba(229, 217, 200, 0.5);
    }

    .nav-panel {
        display: flex;
        align-items: center;
        gap: 16px;
        background: var(--color-surface);
        border-radius: var(--radius-md);
        border: 1px solid var(--color-border);
        box-shadow: var(--shadow-sm);
        padding: 12px 18px;
        transition: box-shadow 0.3s ease;
    }

    .nav-panel:hover {
        box-shadow: var(--shadow-md);
    }

    .logo {
        font-size: 20px;
        font-weight: 800;
        background: var(--color-gradient);
        -webkit-background-clip: text;
        background-clip: text;
        -webkit-text-fill-color: transparent;
        color: transparent;
        white-space: nowrap;
        letter-spacing: 0.5px;
    }

    .nav-links {
        display: flex;
        align-items: center;
        gap: 10px;
        flex: 1;
    }

    .nav-link {
        display: inline-flex;
        align-items: center;
        gap: 6px;
        padding: 9px 16px;
        border-radius: 999px;
        color: var(--color-body);
        background: var(--color-surface-soft);
        font-size: 14px;
        font-weight: 500;
        border: 1px solid transparent;
        transition: all 0.2s ease;
    }

    .nav-link svg {
        width: 16px;
        height: 16px;
        stroke: currentColor;
    }

    .nav-link:hover {
        background: rgba(234, 88, 12, 0.1);
        color: var(--color-primary);
        transform: translateY(-2px);
    }

    .nav-link.active {
        background: rgba(234, 88, 12, 0.12);
        color: var(--color-primary);
        border-color: rgba(234, 88, 12, 0.2);
    }

    .nav-cta {
        margin-left: auto;
    }

    .nav-toggle {
        display: none;
        background: none;
        border: none;
        padding: 8px;
        border-radius: 8px;
        color: var(--color-heading);
        cursor: pointer;
    }

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

    .btn {
        display: inline-flex;
        align-items: center;
        justify-content: center;
        gap: 8px;
        padding: 12px 24px;
        border-radius: var(--radius-sm);
        font-size: 15px;
        font-weight: 600;
        border: 1px solid transparent;
        cursor: pointer;
        transition: all 0.2s ease;
        line-height: 1.4;
        text-align: center;
    }

    .btn-primary {
        background: var(--color-gradient);
        color: #fff;
        box-shadow: var(--shadow-sm);
    }

    .btn-primary:hover {
        transform: translateY(-1px);
        box-shadow: var(--shadow-md);
        color: #fff;
    }

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

    .btn-secondary {
        background: var(--color-surface);
        color: var(--color-primary);
        border-color: var(--color-border);
    }

    .btn-secondary:hover {
        border-color: var(--color-primary);
        color: var(--color-primary);
        background: rgba(234, 88, 12, 0.04);
    }

    .btn-sm {
        padding: 8px 18px;
        font-size: 14px;
    }

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

    .article-hero {
        padding: 56px 0 40px;
        background:
            linear-gradient(135deg, rgba(250, 246, 240, 0.94) 0%, rgba(234, 88, 12, 0.55) 100%),
            url('/assets/images/backpic/back-1.jpg') center / cover no-repeat;
        border-bottom: 1px solid var(--color-border);
    }

    .breadcrumb {
        font-size: 13px;
        color: var(--color-muted);
        margin-bottom: 24px;
        display: flex;
        flex-wrap: wrap;
        gap: 6px;
    }

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

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

    .article-hero-inner {
        max-width: 760px;
    }

    .article-meta {
        display: flex;
        flex-wrap: wrap;
        gap: 14px 24px;
        margin-bottom: 16px;
        font-size: 14px;
        color: var(--color-muted);
    }

    .article-meta-item {
        display: inline-flex;
        align-items: center;
        gap: 6px;
    }

    .article-meta-item svg {
        width: 15px;
        height: 15px;
        stroke: currentColor;
    }

    .article-category {
        display: inline-block;
        padding: 4px 12px;
        border-radius: 999px;
        background: rgba(15, 118, 110, 0.12);
        color: var(--color-accent);
        font-size: 13px;
        font-weight: 600;
    }

    .article-hero h1 {
        font-size: clamp(30px, 5vw, 44px);
        font-weight: 800;
        line-height: 1.25;
        color: var(--color-heading);
        letter-spacing: -0.02em;
    }

    .article-layout {
        display: grid;
        grid-template-columns: minmax(0, 720px) 300px;
        gap: 56px;
        padding-top: clamp(40px, 6vw, 64px);
        padding-bottom: var(--spacing-section);
        align-items: start;
    }

    .article-main {
        min-width: 0;
    }

    .article-content {
        font-size: 16px;
        line-height: 1.85;
        color: var(--color-body);
    }

    .article-content > p:first-of-type {
        font-size: 17px;
        color: var(--color-heading);
        font-weight: 500;
    }

    .article-content p {
        margin: 1.2em 0;
    }

    .article-content h2 {
        font-size: 24px;
        font-weight: 700;
        color: var(--color-heading);
        margin: 1.8em 0 0.8em;
        padding-bottom: 0.3em;
        border-bottom: 2px solid var(--color-border);
        line-height: 1.3;
    }

    .article-content h3 {
        font-size: 19px;
        font-weight: 700;
        color: var(--color-heading);
        margin: 1.6em 0 0.6em;
    }

    .article-content blockquote {
        border-left: 4px solid var(--color-accent);
        background: var(--color-surface-soft);
        padding: 16px 22px;
        border-radius: 0 12px 12px 0;
        margin: 1.6em 0;
        color: var(--color-body);
    }

    .article-content ul,
    .article-content ol {
        padding-left: 1.4em;
        margin: 1.2em 0;
    }

    .article-content ul {
        list-style: disc;
    }

    .article-content ol {
        list-style: decimal;
    }

    .article-content li {
        margin: 0.5em 0;
    }

    .article-content img {
        border-radius: var(--radius-md);
        box-shadow: var(--shadow-sm);
        margin: 1.6em 0;
    }

    .article-content a {
        color: var(--color-accent);
        text-decoration: underline;
        text-underline-offset: 3px;
    }

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

    .not-found-box {
        background: var(--color-surface);
        border: 1px solid var(--color-border);
        border-radius: var(--radius-lg);
        padding: 64px 32px;
        text-align: center;
        box-shadow: var(--shadow-sm);
    }

    .not-found-box p {
        font-size: 18px;
        font-weight: 600;
        color: var(--color-heading);
        margin-bottom: 24px;
    }

    .article-sidebar {
        display: flex;
        flex-direction: column;
        gap: 24px;
        position: sticky;
        top: 100px;
    }

    .sidebar-card {
        background: var(--color-surface);
        border-radius: var(--radius-md);
        border: 1px solid var(--color-border);
        box-shadow: var(--shadow-sm);
        padding: 20px;
    }

    .sidebar-card h2 {
        font-size: 18px;
        font-weight: 700;
        color: var(--color-heading);
        margin-bottom: 16px;
        padding-bottom: 10px;
        border-bottom: 1px solid var(--color-border);
        position: relative;
    }

    .sidebar-card h2::after {
        content: "";
        position: absolute;
        left: 0;
        bottom: -1px;
        width: 36px;
        height: 3px;
        background: var(--color-gradient);
        border-radius: 999px;
    }

    .related-list {
        display: flex;
        flex-direction: column;
        gap: 18px;
    }

    .related-item {
        display: flex;
        gap: 12px;
        align-items: center;
        padding: 8px;
        border-radius: var(--radius-sm);
        transition: background 0.2s ease;
    }

    .related-item:hover {
        background: var(--color-surface-soft);
    }

    .related-thumb {
        width: 72px;
        height: 64px;
        border-radius: 10px;
        overflow: hidden;
        flex-shrink: 0;
        background: var(--color-surface-soft);
    }

    .related-thumb img {
        width: 100%;
        height: 100%;
        object-fit: cover;
    }

    .related-info {
        min-width: 0;
    }

    .related-info .related-title {
        font-size: 14px;
        font-weight: 600;
        color: var(--color-heading);
        line-height: 1.4;
        display: -webkit-box;
        -webkit-line-clamp: 2;
        -webkit-box-orient: vertical;
        overflow: hidden;
        margin-bottom: 4px;
        transition: color 0.2s ease;
    }

    .related-item:hover .related-title {
        color: var(--color-primary);
    }

    .related-info .related-date {
        font-size: 12px;
        color: var(--color-muted);
    }

    .article-cta {
        background: var(--color-gradient);
        border-radius: var(--radius-lg);
        padding: 56px 40px;
        text-align: center;
        color: #fff;
        margin-bottom: var(--spacing-section);
        position: relative;
        overflow: hidden;
    }

    .article-cta h2 {
        font-size: clamp(24px, 4vw, 34px);
        font-weight: 800;
        margin-bottom: 12px;
        line-height: 1.3;
    }

    .article-cta p {
        font-size: 15px;
        opacity: 0.95;
        max-width: 480px;
        margin: 0 auto 28px;
    }

    .article-cta .btn {
        background: var(--color-surface);
        color: var(--color-primary);
        box-shadow: 0 8px 20px rgba(0, 0, 0, 0.15);
    }

    .article-cta .btn:hover {
        transform: translateY(-2px);
        box-shadow: 0 12px 28px rgba(0, 0, 0, 0.2);
        color: var(--color-primary-dark);
    }

    .site-footer {
        background: #1F2937;
        color: #C7CBD1;
        padding: 56px 0 24px;
        font-size: 14px;
    }

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

    .footer-brand .footer-logo {
        font-size: 20px;
        font-weight: 800;
        color: #fff;
        background: var(--color-gradient);
        -webkit-background-clip: text;
        background-clip: text;
        -webkit-text-fill-color: transparent;
        margin-bottom: 12px;
        display: inline-block;
    }

    .footer-brand p {
        line-height: 1.75;
        color: #A6ADB8;
        max-width: 360px;
    }

    .footer-title {
        font-size: 16px;
        font-weight: 700;
        color: #fff;
        margin-bottom: 14px;
    }

    .footer-links {
        display: flex;
        flex-direction: column;
        gap: 10px;
    }

    .footer-links a {
        color: #C7CBD1;
        transition: color 0.2s;
    }

    .footer-links a:hover {
        color: var(--color-primary-light);
    }

    .footer-bottom {
        border-top: 1px solid rgba(255, 255, 255, 0.1);
        padding-top: 24px;
        display: flex;
        flex-wrap: wrap;
        justify-content: space-between;
        gap: 10px;
        color: #8B93A1;
        font-size: 13px;
    }

    .footer-domain {
        color: var(--color-primary-light);
    }

    @media (max-width: 991px) {
        .article-layout {
            grid-template-columns: 1fr;
            gap: 48px;
        }

        .article-sidebar {
            position: static;
            flex-direction: row;
            flex-wrap: wrap;
        }

        .sidebar-card {
            flex: 1;
            min-width: 260px;
        }

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

    @media (max-width: 767px) {
        .site-header {
            padding-top: 12px;
        }

        .nav-panel {
            flex-wrap: wrap;
            padding: 10px 14px;
            gap: 10px;
        }

        .nav-links {
            display: none;
            flex-direction: column;
            width: 100%;
            gap: 8px;
            padding-top: 8px;
            border-top: 1px solid var(--color-border);
        }

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

        .nav-link {
            width: 100%;
            justify-content: center;
        }

        .nav-toggle {
            display: inline-flex;
            margin-left: auto;
        }

        .nav-cta {
            display: none;
        }

        .article-hero {
            padding: 40px 0 32px;
        }

        .article-hero h1 {
            font-size: 28px;
        }

        .article-meta {
            gap: 10px 16px;
        }

        .article-layout {
            padding-top: 32px;
            padding-bottom: 64px;
        }

        .article-content {
            font-size: 15px;
        }

        .article-content h2 {
            font-size: 20px;
        }

        .article-content h3 {
            font-size: 18px;
        }

        .article-cta {
            padding: 40px 24px;
        }

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

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

    @media (max-width: 520px) {
        .container {
            padding-left: 16px;
            padding-right: 16px;
        }

        .nav-panel {
            border-radius: var(--radius-sm);
        }

        .logo {
            font-size: 18px;
        }

        .breadcrumb {
            font-size: 12px;
        }

        .article-meta {
            flex-direction: column;
            align-items: flex-start;
            gap: 6px;
        }

        .article-meta-item {
            font-size: 13px;
        }

        .related-item {
            align-items: flex-start;
        }
    }