/* roulang page: index */
:root {
  --color-bg: #F7F3EC;
  --color-surface: #FFFFFF;
  --color-surface-accent: #F2EAE0;
  --color-primary: #9A6B45;
  --color-primary-dark: #7C5332;
  --color-accent: #C88E4E;
  --color-border: #E5DCCD;
  --color-text: #2A2621;
  --color-text-secondary: #6E645A;
  --color-success: #5F7B60;
  --color-footer: #26211B;
  --radius-card: 16px;
  --radius-img: 12px;
  --radius-btn: 999px;
  --shadow-card: 0 8px 30px rgba(0, 0, 0, 0.06);
  --shadow-card-hover: 0 12px 40px rgba(0, 0, 0, 0.10);
  --transition: 0.25s ease;
}
html { scroll-behavior: smooth; }
body {
  font-family: "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
  background: var(--color-bg);
  color: var(--color-text);
  line-height: 1.75;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
}
h1, h2, h3, h4, .font-heading {
  font-family: "Noto Serif SC", "Songti SC", "STSong", serif;
}
a { color: inherit; text-decoration: none; transition: color 0.25s ease; }
img { max-width: 100%; height: auto; display: block; }
button { cursor: pointer; font-family: inherit; }
.container { max-width: 1200px; margin-inline: auto; padding-inline: 24px; }
@media (max-width: 768px) {
  .container { padding-inline: 16px; }
}
.section { padding: 84px 0; border-bottom: 1px solid var(--color-border); }
@media (max-width: 768px) {
  .section { padding: 58px 0; }
}
.section-tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 14px;
  background: var(--color-surface-accent);
  color: var(--color-primary);
  border-radius: 6px;
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.05em;
}
.section-title {
  font-size: 30px;
  font-weight: 700;
  line-height: 1.4;
  margin-top: 14px;
  letter-spacing: 0.02em;
}
@media (max-width: 768px) {
  .section-title { font-size: 24px; }
}
.section-lead {
  color: var(--color-text-secondary);
  max-width: 640px;
  line-height: 1.8;
  margin-top: 10px;
  font-size: 15px;
}
/* Header */
#site-header {
  position: sticky;
  top: 0;
  z-index: 60;
  background: rgba(247, 243, 236, 0.92);
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
  border-bottom: 1px solid var(--color-border);
}
.nav-link {
  position: relative;
  font-size: 15px;
  font-weight: 500;
  color: var(--color-text);
  padding: 6px 2px;
  transition: color 0.25s ease;
}
.nav-link:hover { color: var(--color-primary); }
.nav-link::after {
  content: '';
  position: absolute;
  left: 0;
  bottom: -2px;
  width: 100%;
  height: 2px;
  background: var(--color-primary);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.25s ease;
}
.nav-link:hover::after { transform: scaleX(1); }
.nav-link.active { color: var(--color-primary); font-weight: 700; }
.nav-link.active::after { transform: scaleX(1); }
.btn-primary, .btn-outline {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  border-radius: var(--radius-btn);
  font-weight: 600;
  font-size: 15px;
  padding: 12px 28px;
  line-height: 1.4;
  transition: all 0.25s ease;
  border: 1.5px solid transparent;
}
.btn-primary {
  background: var(--color-primary);
  color: var(--color-surface);
  box-shadow: 0 4px 16px rgba(154, 107, 69, 0.28);
}
.btn-primary:hover {
  background: var(--color-primary-dark);
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(154, 107, 69, 0.35);
}
.btn-primary:focus-visible {
  outline: none;
  box-shadow: 0 0 0 3px rgba(154, 107, 69, 0.35);
}
.btn-outline {
  border-color: var(--color-primary);
  color: var(--color-primary);
  background: transparent;
}
.btn-outline:hover {
  background: rgba(154, 107, 69, 0.06);
  transform: translateY(-2px);
}
.btn-outline:focus-visible {
  outline: none;
  box-shadow: 0 0 0 3px rgba(154, 107, 69, 0.25);
}
/* Hero */
.hero-section {
  position: relative;
  overflow: hidden;
  background: #1E1A16;
  color: #F7F3EC;
}
.hero-bg {
  position: absolute;
  inset: 0;
  background-size: cover;
  background-position: center;
  background-image: url('/assets/images/backpic/back-1.jpg');
}
.hero-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(110deg, rgba(30, 26, 22, 0.94) 0%, rgba(30, 26, 22, 0.82) 45%, rgba(30, 26, 22, 0.45) 75%, rgba(30, 26, 22, 0.30) 100%);
}
.hero-content {
  position: relative;
  z-index: 2;
  padding: 84px 0 40px;
  max-width: 680px;
}
@media (max-width: 768px) {
  .hero-content { padding: 48px 0 28px; }
}
.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(200, 142, 78, 0.22);
  border: 1px solid rgba(200, 142, 78, 0.5);
  color: #E8C9A3;
  font-size: 13px;
  font-weight: 600;
  padding: 6px 16px;
  border-radius: 999px;
  letter-spacing: 0.06em;
  margin-bottom: 22px;
}
.hero-badge::before {
  content: '';
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--color-accent);
  animation: pulse-dot 1.8s infinite;
}
@keyframes pulse-dot {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.5; transform: scale(1.3); }
}
.hero-title {
  font-size: 44px;
  font-weight: 700;
  line-height: 1.3;
  letter-spacing: 0.02em;
  color: #FFFDF8;
}
@media (max-width: 768px) {
  .hero-title { font-size: 29px; }
}
.hero-desc {
  font-size: 16px;
  line-height: 1.9;
  color: rgba(247, 243, 236, 0.82);
  margin-top: 20px;
  max-width: 600px;
}
.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 28px;
}
.hero-actions .btn-primary {
  background: var(--color-accent);
  color: #1E1A16;
  box-shadow: 0 4px 20px rgba(200, 142, 78, 0.35);
}
.hero-actions .btn-primary:hover {
  background: #B77D3E;
  color: #1E1A16;
}
.hero-actions .btn-outline {
  border-color: rgba(247, 243, 236, 0.6);
  color: #F7F3EC;
}
.hero-actions .btn-outline:hover {
  background: rgba(247, 243, 236, 0.1);
  border-color: #F7F3EC;
}
/* Metrics */
.metrics-grid {
  position: relative;
  z-index: 2;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
  margin-top: 32px;
  padding-bottom: 56px;
}
@media (max-width: 768px) {
  .metrics-grid { grid-template-columns: repeat(2, 1fr); gap: 12px; padding-bottom: 40px; }
}
.metric-card {
  background: rgba(255, 255, 255, 0.94);
  border-radius: var(--radius-card);
  padding: 22px 20px;
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.18);
  border: 1px solid rgba(255, 255, 255, 0.6);
  transition: transform 0.25s ease, box-shadow 0.25s ease;
}
.metric-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 14px 32px rgba(0, 0, 0, 0.24);
}
.metric-value {
  font-family: "Noto Serif SC", serif;
  font-size: 32px;
  font-weight: 700;
  color: var(--color-primary);
  line-height: 1.2;
}
.metric-value span { color: var(--color-accent); }
.metric-label {
  font-size: 12px;
  color: var(--color-text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-top: 6px;
}
@media (max-width: 768px) {
  .metric-value { font-size: 24px; }
}
/* Cards */
.service-card {
  background: var(--color-surface);
  border-radius: var(--radius-card);
  box-shadow: var(--shadow-card);
  overflow: hidden;
  border: 1px solid var(--color-border);
  transition: transform 0.4s ease, box-shadow 0.4s ease;
  height: 100%;
  display: flex;
  flex-direction: column;
}
.service-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-card-hover);
}
.service-card-img {
  overflow: hidden;
  aspect-ratio: 4 / 3;
}
.service-card-img img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.4s ease;
}
.service-card:hover .service-card-img img {
  transform: scale(1.04);
}
.service-card-body {
  padding: 24px;
  display: flex;
  flex-direction: column;
  flex: 1;
}
.service-card-title {
  font-size: 20px;
  font-weight: 700;
  line-height: 1.4;
  color: var(--color-text);
}
.service-card-desc {
  color: var(--color-text-secondary);
  font-size: 14px;
  line-height: 1.75;
  margin-top: 10px;
  flex: 1;
}
.service-card-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 14px;
}
.tag {
  display: inline-block;
  background: var(--color-surface-accent);
  color: var(--color-primary);
  font-size: 12px;
  font-weight: 600;
  padding: 4px 10px;
  border-radius: 6px;
  letter-spacing: 0.03em;
}
.tag-light { background: rgba(154, 107, 69, 0.1); }
.service-card-footer {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-top: 18px;
  padding-top: 16px;
  border-top: 1px solid var(--color-border);
  font-size: 14px;
}
.service-card-footer .link-primary {
  color: var(--color-primary);
  font-weight: 600;
}
.service-card-footer .link-primary:hover { text-decoration: underline; }
.service-card-footer .dot-sep { width: 3px; height: 3px; border-radius: 50%; background: var(--color-border); }
/* Countdown */
.promo-section {
  position: relative;
  overflow: hidden;
  background: linear-gradient(135deg, #3A2E23 0%, #5A4532 100%);
  color: #F7F3EC;
  border-bottom: 1px solid var(--color-border);
}
.promo-pattern {
  position: absolute;
  inset: 0;
  background-image: url('/assets/images/backpic/back-2.jpg');
  background-size: cover;
  background-position: center;
  opacity: 0.18;
}
.promo-content {
  position: relative;
  z-index: 2;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 28px;
  padding: 44px 0;
}
@media (max-width: 768px) {
  .promo-content { padding: 34px 0; }
}
.countdown-wrap { display: flex; align-items: center; gap: 12px; }
.countdown-box {
  min-width: 56px;
  text-align: center;
  background: rgba(255, 255, 255, 0.12);
  border: 1px solid rgba(255, 255, 255, 0.16);
  border-radius: 12px;
  padding: 10px 8px;
}
.countdown-box .num {
  font-family: "Noto Serif SC", serif;
  font-size: 26px;
  font-weight: 700;
  line-height: 1.2;
  color: #F0C895;
}
.countdown-box .unit {
  font-size: 12px;
  opacity: 0.7;
  margin-top: 4px;
  letter-spacing: 0.08em;
}
@media (max-width: 520px) {
  .countdown-box { min-width: 46px; padding: 8px 4px; }
  .countdown-box .num { font-size: 20px; }
}
/* Tiers */
.tier-card {
  background: var(--color-surface);
  border-radius: var(--radius-card);
  border: 1px solid var(--color-border);
  box-shadow: var(--shadow-card);
  padding: 30px 26px;
  height: 100%;
  transition: transform 0.3s ease, box-shadow 0.3s ease, border-color 0.3s ease;
  position: relative;
}
.tier-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-card-hover);
  border-color: var(--color-primary);
}
.tier-card.featured {
  border: 1.5px solid var(--color-primary);
  background: linear-gradient(180deg, #FFFDF9, #FBF5EC);
}
.tier-name {
  font-size: 20px;
  font-weight: 700;
  color: var(--color-text);
}
.tier-desc {
  font-size: 13px;
  color: var(--color-text-secondary);
  line-height: 1.6;
  margin-top: 6px;
}
.tier-list {
  list-style: none;
  margin-top: 16px;
  padding: 0;
}
.tier-list li {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  font-size: 14px;
  color: var(--color-text);
  padding: 6px 0;
  line-height: 1.6;
}
.tier-list li::before {
  content: '✓';
  color: var(--color-success);
  font-weight: 700;
  flex-shrink: 0;
  margin-top: 1px;
}
.tier-cta {
  margin-top: 20px;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  color: var(--color-primary);
  font-weight: 600;
  font-size: 14px;
}
.tier-cta:hover { text-decoration: underline; }
/* Comparison */
.compare-section { background: var(--color-surface); }
.compare-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0;
  position: relative;
  margin-top: 36px;
}
@media (max-width: 768px) {
  .compare-grid { grid-template-columns: 1fr; gap: 24px; }
}
.compare-card {
  padding: 32px 28px;
  border-radius: var(--radius-card);
}
.compare-vs {
  position: absolute;
  left: 50%;
  top: 50%;
  transform: translate(-50%, -50%);
  width: 58px;
  height: 58px;
  border-radius: 50%;
  background: var(--color-primary);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: "Noto Serif SC", serif;
  font-weight: 700;
  font-size: 16px;
  letter-spacing: 0.05em;
  box-shadow: 0 6px 20px rgba(154, 107, 69, 0.35);
  z-index: 3;
}
@media (max-width: 768px) {
  .compare-vs {
    left: 50%;
    top: auto;
    transform: translate(-50%, -50%);
  }
}
.compare-card.traditional {
  background: #F5F1EA;
  border: 1px solid var(--color-border);
}
.compare-card.studio {
  background: var(--color-surface);
  border: 1.5px solid var(--color-primary);
  box-shadow: var(--shadow-card);
}
.compare-item {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 12px 0;
  border-bottom: 1px dashed var(--color-border);
  font-size: 14px;
  line-height: 1.65;
}
.compare-item:last-child { border-bottom: none; }
.compare-item .icon-mark {
  flex-shrink: 0;
  width: 22px;
  height: 22px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 12px;
  font-weight: 700;
  margin-top: 2px;
}
.compare-item .icon-mark.cross {
  background: rgba(110, 100, 90, 0.12);
  color: var(--color-text-secondary);
}
.compare-item .icon-mark.check {
  background: rgba(95, 123, 96, 0.15);
  color: var(--color-success);
}
.compare-item .label {
  font-weight: 600;
  color: var(--color-text);
  margin-right: 6px;
}
.compare-summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  flex-wrap: wrap;
  background: var(--color-surface-accent);
  border-radius: var(--radius-card);
  padding: 20px 26px;
  margin-top: 28px;
  font-size: 15px;
}
.compare-summary strong { color: var(--color-primary); }
/* News */
.news-list-wrap { max-width: 100%; }
.news-item {
  display: flex;
  gap: 20px;
  padding: 22px 18px;
  border-radius: 14px;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  transition: border-color 0.25s ease, box-shadow 0.25s ease;
}
.news-item:hover {
  border-color: var(--color-primary);
  box-shadow: var(--shadow-card);
}
.news-date-badge {
  flex-shrink: 0;
  width: 64px;
  height: 64px;
  border-radius: 12px;
  background: var(--color-surface-accent);
  color: var(--color-primary);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  line-height: 1.2;
}
.news-date-badge .d { font-size: 22px; font-family: "Noto Serif SC", serif; }
.news-date-badge .m { font-size: 12px; opacity: 0.8; }
.news-item-content { flex: 1; min-width: 0; }
.news-item-content h3 {
  font-size: 17px;
  font-weight: 700;
  line-height: 1.5;
  margin-top: 6px;
}
.news-item-content h3 a:hover { color: var(--color-primary); }
.news-item-content p {
  color: var(--color-text-secondary);
  font-size: 14px;
  line-height: 1.65;
  margin-top: 6px;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.news-meta {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
}
.news-link {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  color: var(--color-primary);
  font-weight: 600;
  font-size: 14px;
  margin-top: 8px;
}
.news-link:hover { text-decoration: underline; }
.empty-state {
  border: 1px dashed var(--color-border);
  background: var(--color-surface);
  border-radius: var(--radius-card);
  padding: 56px 24px;
  text-align: center;
  color: var(--color-text-secondary);
  font-size: 15px;
  width: 100%;
}
.side-panel {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-card);
  padding: 24px;
  box-shadow: var(--shadow-card);
}
.side-panel-title {
  font-size: 17px;
  font-weight: 700;
  padding-bottom: 12px;
  margin-bottom: 14px;
  border-bottom: 2px solid var(--color-surface-accent);
}
.side-link-list { list-style: none; padding: 0; margin: 0; }
.side-link-list li { padding: 8px 0; }
.side-link-list li + li { border-top: 1px solid var(--color-border); }
.side-link-list a {
  font-size: 14px;
  color: var(--color-text);
  transition: color 0.25s ease;
}
.side-link-list a:hover { color: var(--color-primary); }
.side-contact {
  margin-top: 18px;
  background: var(--color-surface-accent);
  border-radius: 12px;
  padding: 18px;
  text-align: center;
}
.side-contact .phone {
  font-size: 20px;
  font-weight: 700;
  color: var(--color-primary);
  font-family: "Noto Serif SC", serif;
}
/* FAQ */
.faq-wrap { max-width: 860px; margin-inline: auto; }
.faq-item {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: 14px;
  margin-bottom: 12px;
  overflow: hidden;
  transition: border-color 0.25s ease, box-shadow 0.25s ease;
}
.faq-item:hover { border-color: var(--color-primary); }
.faq-item.open { border-color: var(--color-primary); box-shadow: var(--shadow-card); }
.faq-question {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 18px 22px;
  background: transparent;
  border: none;
  text-align: left;
  font-size: 16px;
  font-weight: 600;
  color: var(--color-text);
  font-family: "Noto Sans SC", "PingFang SC", sans-serif;
  transition: color 0.25s ease;
}
.faq-question:hover { color: var(--color-primary); }
.faq-icon {
  flex-shrink: 0;
  width: 26px;
  height: 26px;
  border-radius: 50%;
  border: 1.5px solid var(--color-primary);
  color: var(--color-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 16px;
  font-weight: 600;
  transition: transform 0.25s ease, background 0.25s ease, color 0.25s ease;
}
.faq-item.open .faq-icon {
  background: var(--color-primary);
  color: #fff;
  transform: rotate(45deg);
}
.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.3s ease;
}
.faq-answer-inner {
  padding: 0 22px 18px;
  color: var(--color-text-secondary);
  font-size: 14px;
  line-height: 1.8;
}
/* Form */
.contact-section {
  background: var(--color-surface);
}
.form-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-card);
  box-shadow: var(--shadow-card);
  padding: 32px;
}
.form-card h2 { font-size: 26px; font-weight: 700; }
.form-group { margin-bottom: 18px; }
.form-label {
  display: block;
  font-size: 14px;
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: 6px;
}
.form-label .req { color: #C05252; margin-left: 2px; }
.form-input, .form-textarea {
  width: 100%;
  padding: 12px 14px;
  border: 1px solid var(--color-border);
  border-radius: 10px;
  background: var(--color-surface);
  font-family: inherit;
  font-size: 14px;
  color: var(--color-text);
  transition: border-color 0.25s ease, box-shadow 0.25s ease;
}
.form-input:focus, .form-textarea:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(154, 107, 69, 0.15);
}
.form-input::placeholder, .form-textarea::placeholder { color: #B0A79C; }
.form-textarea { min-height: 90px; resize: vertical; }
.form-note {
  font-size: 13px;
  color: var(--color-text-secondary);
  margin-top: 12px;
  text-align: center;
}
.contact-info-card {
  background: var(--color-surface-accent);
  border-radius: var(--radius-card);
  padding: 32px;
  height: 100%;
}
.contact-info-row {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  padding: 14px 0;
  border-bottom: 1px dashed rgba(154, 107, 69, 0.2);
}
.contact-info-row:last-child { border-bottom: none; }
.contact-info-icon {
  flex-shrink: 0;
  width: 40px;
  height: 40px;
  border-radius: 10px;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-primary);
  font-size: 18px;
}
.contact-info-label { font-size: 13px; color: var(--color-text-secondary); }
.contact-info-value { font-weight: 600; color: var(--color-text); font-size: 15px; margin-top: 2px; }
.contact-info-value a:hover { color: var(--color-primary); }
.form-success {
  background: rgba(95, 123, 96, 0.1);
  border: 1px solid rgba(95, 123, 96, 0.35);
  color: var(--color-success);
  border-radius: 10px;
  padding: 12px 16px;
  font-size: 14px;
  margin-top: 16px;
  display: none;
}
/* Footer */
.site-footer {
  background: var(--color-footer);
  color: rgba(247, 243, 236, 0.75);
}
.footer-top {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 32px;
  flex-wrap: wrap;
  padding: 52px 0 36px;
}
.footer-brand-name {
  font-family: "Noto Serif SC", serif;
  font-size: 24px;
  font-weight: 700;
  color: #F7F3EC;
}
.footer-desc {
  max-width: 380px;
  margin-top: 12px;
  font-size: 14px;
  line-height: 1.8;
  color: rgba(247, 243, 236, 0.65);
}
.footer-links {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 24px;
}
.footer-links a {
  font-size: 14px;
  color: rgba(247, 243, 236, 0.7);
}
.footer-links a:hover { color: #F0C895; }
.footer-bottom {
  border-top: 1px solid rgba(247, 243, 236, 0.12);
  padding: 20px 0;
  font-size: 13px;
  color: rgba(247, 243, 236, 0.5);
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 10px;
}
/* Mobile menu */
.mobile-menu-btn {
  display: none;
  background: none;
  border: none;
  width: 40px;
  height: 40px;
  border-radius: 8px;
  align-items: center;
  justify-content: center;
  color: var(--color-text);
}
.mobile-menu-btn:hover { background: var(--color-surface-accent); }
.mobile-menu {
  display: none;
  background: var(--color-surface);
  border-top: 1px solid var(--color-border);
  padding: 12px 0 20px;
}
.mobile-menu a {
  display: block;
  padding: 12px 16px;
  font-size: 15px;
  font-weight: 500;
  border-radius: 8px;
}
.mobile-menu a:hover { background: var(--color-surface-accent); color: var(--color-primary); }
.mobile-menu a.active { color: var(--color-primary); font-weight: 700; background: var(--color-surface-accent); }
@media (max-width: 768px) {
  .desktop-nav { display: none; }
  .mobile-menu-btn { display: flex; }
  .mobile-menu.open { display: block; }
}
/* Back to top */
.back-top {
  position: fixed;
  right: 24px;
  bottom: 24px;
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: var(--color-primary);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 8px 24px rgba(154, 107, 69, 0.3);
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.3s ease, transform 0.3s ease;
  z-index: 40;
  border: none;
}
.back-top.show { opacity: 1; pointer-events: auto; }
.back-top:hover { transform: translateY(-3px); background: var(--color-primary-dark); }
/* Reveal animation */
.reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}
.reveal.visible { opacity: 1; transform: translateY(0); }

/* roulang page: article */
:root {
  --color-bg: #F7F3EC;
  --color-surface: #FFFFFF;
  --color-surface-accent: #F2EAE0;
  --color-primary: #9A6B45;
  --color-primary-dark: #7C5332;
  --color-accent: #C88E4E;
  --color-border: #E5DCCD;
  --color-text: #2A2621;
  --color-text-secondary: #6E645A;
  --color-success: #5F7B60;
  --color-footer: #26211B;
  --font-heading: 'Noto Serif SC', 'Songti SC', 'STSong', serif;
  --font-body: 'Noto Sans SC', 'PingFang SC', 'Microsoft YaHei', sans-serif;
  --radius-card: 16px;
  --radius-btn: 999px;
  --shadow-card: 0 8px 30px rgba(0, 0, 0, 0.06);
  --shadow-card-hover: 0 12px 40px rgba(0, 0, 0, 0.10);
  --transition: 0.25s ease;
}
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}
html {
  scroll-behavior: smooth;
}
body {
  font-family: var(--font-body);
  background: var(--color-bg);
  color: var(--color-text);
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
}
.container {
  max-width: 1200px;
  margin-inline: auto;
  padding-inline: 16px;
}
@media (min-width: 768px) {
  .container {
    padding-inline: 24px;
  }
}
a {
  color: inherit;
  text-decoration: none;
}
img {
  max-width: 100%;
  height: auto;
  display: block;
}
button {
  cursor: pointer;
  font-family: inherit;
}
input,
select,
textarea {
  font-family: inherit;
}
#site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255, 255, 255, 0.94);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--color-border);
  transition: box-shadow var(--transition);
}
#site-header.scrolled {
  box-shadow: 0 4px 24px rgba(42, 38, 33, 0.06);
}
.desktop-nav .nav-link {
  position: relative;
  font-size: 15px;
  color: var(--color-text);
  padding: 8px 2px;
  transition: color var(--transition);
}
.desktop-nav .nav-link::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--color-primary);
  transition: width var(--transition);
}
.desktop-nav .nav-link:hover {
  color: var(--color-primary);
}
.desktop-nav .nav-link:hover::after {
  width: 100%;
}
.desktop-nav .nav-link.active {
  color: var(--color-primary);
  font-weight: 700;
}
.desktop-nav .nav-link.active::after {
  width: 100%;
}
.btn-primary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  background: var(--color-primary);
  color: #fff !important;
  font-size: 15px;
  font-weight: 600;
  padding: 14px 28px;
  border-radius: var(--radius-btn);
  transition: all var(--transition);
  text-decoration: none;
  border: none;
  line-height: 1.4;
}
.btn-primary:hover {
  background: var(--color-primary-dark);
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(154, 107, 69, 0.3);
}
.btn-primary:focus-visible {
  outline: 3px solid rgba(154, 107, 69, 0.3);
  outline-offset: 2px;
}
.btn-outline {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  background: transparent;
  color: var(--color-primary) !important;
  font-size: 15px;
  font-weight: 600;
  padding: 14px 28px;
  border-radius: var(--radius-btn);
  border: 1.5px solid var(--color-primary);
  transition: all var(--transition);
  text-decoration: none;
}
.btn-outline:hover {
  background: rgba(154, 107, 69, 0.06);
  transform: translateY(-2px);
}
.mobile-menu-btn {
  display: none;
  background: none;
  border: none;
  color: var(--color-text);
  padding: 8px;
  border-radius: 8px;
  transition: background var(--transition);
}
.mobile-menu-btn:hover {
  background: var(--color-surface-accent);
}
.mobile-menu {
  display: none;
  flex-direction: column;
  background: var(--color-surface);
  border-top: 1px solid var(--color-border);
  padding: 8px 16px 16px;
}
.mobile-menu a {
  display: block;
  padding: 12px 8px;
  font-size: 15px;
  font-weight: 500;
  border-radius: 8px;
  transition: all var(--transition);
}
.mobile-menu a:hover,
.mobile-menu a.active {
  background: var(--color-surface-accent);
  color: var(--color-primary);
  font-weight: 600;
}
.mobile-menu.open {
  display: flex;
}
.breadcrumb-bar {
  background: var(--color-surface);
  border-bottom: 1px solid var(--color-border);
  padding: 12px 0;
  font-size: 14px;
  color: var(--color-text-secondary);
}
.breadcrumb-bar .container {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 6px;
}
.breadcrumb-bar a {
  color: var(--color-text-secondary);
  transition: color var(--transition);
}
.breadcrumb-bar a:hover {
  color: var(--color-primary);
}
.breadcrumb-bar .sep {
  color: var(--color-border);
  font-size: 12px;
}
.breadcrumb-bar .current {
  color: var(--color-primary);
  font-weight: 500;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  max-width: 320px;
}
.article-main {
  padding: 56px 0 72px;
}
.article-layout {
  max-width: 860px;
  margin: 0 auto;
}
.article-header {
  text-align: center;
  margin-bottom: 36px;
}
.category-badge {
  display: inline-block;
  background: var(--color-surface-accent);
  color: var(--color-primary);
  font-size: 13px;
  font-weight: 600;
  padding: 6px 18px;
  border-radius: 999px;
  margin-bottom: 16px;
}
.article-title {
  font-family: var(--font-heading);
  font-size: 38px;
  font-weight: 700;
  line-height: 1.3;
  color: var(--color-text);
  margin-bottom: 16px;
}
.article-meta {
  display: flex;
  align-items: center;
  justify-content: center;
  flex-wrap: wrap;
  gap: 12px 20px;
  font-size: 14px;
  color: var(--color-text-secondary);
}
.article-meta .meta-item {
  display: inline-flex;
  align-items: center;
  gap: 6px;
}
.article-meta .meta-item i {
  color: var(--color-accent);
  font-size: 13px;
}
.article-cover {
  width: 100%;
  max-height: 420px;
  object-fit: cover;
  border-radius: var(--radius-card);
  margin-bottom: 40px;
  box-shadow: var(--shadow-card);
}
.article-content {
  max-width: 720px;
  margin: 0 auto;
  font-size: 16px;
  line-height: 1.8;
  color: var(--color-text);
}
.article-content h2 {
  font-family: var(--font-heading);
  font-size: 26px;
  font-weight: 700;
  color: var(--color-text);
  margin: 2em 0 0.8em;
  padding-bottom: 10px;
  border-bottom: 2px solid var(--color-surface-accent);
}
.article-content h3 {
  font-family: var(--font-heading);
  font-size: 20px;
  font-weight: 700;
  color: var(--color-text);
  margin: 1.6em 0 0.6em;
}
.article-content h4 {
  font-size: 18px;
  font-weight: 700;
  color: var(--color-text);
  margin: 1.4em 0 0.5em;
}
.article-content p {
  margin-bottom: 1.5em;
}
.article-content strong {
  font-weight: 700;
  color: var(--color-text);
}
.article-content ul,
.article-content ol {
  margin: 1em 0 1.5em;
  padding-left: 1.5em;
}
.article-content ul li {
  list-style-type: disc;
  margin-bottom: 0.4em;
}
.article-content ol li {
  list-style-type: decimal;
  margin-bottom: 0.4em;
}
.article-content blockquote {
  border-left: 4px solid var(--color-primary);
  background: var(--color-surface-accent);
  padding: 16px 20px;
  margin: 1.8em 0;
  border-radius: 0 12px 12px 0;
  color: var(--color-text-secondary);
  font-style: italic;
}
.article-content img {
  max-width: 100%;
  border-radius: 12px;
  margin: 1.5em auto;
  box-shadow: var(--shadow-card);
}
.article-content figcaption {
  font-size: 14px;
  color: var(--color-text-secondary);
  text-align: center;
  margin-top: -1em;
  margin-bottom: 1.5em;
}
.article-content a {
  color: var(--color-primary);
  text-decoration: underline;
  transition: color var(--transition);
}
.article-content a:hover {
  color: var(--color-primary-dark);
}
.article-content table {
  width: 100%;
  border-collapse: collapse;
  margin: 1.5em 0;
  font-size: 15px;
}
.article-content th {
  background: var(--color-surface-accent);
  font-weight: 700;
  padding: 10px 14px;
  border: 1px solid var(--color-border);
  text-align: left;
}
.article-content td {
  padding: 10px 14px;
  border: 1px solid var(--color-border);
}
.article-content tr:hover td {
  background: #FBF8F3;
}
.article-content code {
  background: #F1EDE6;
  border-radius: 4px;
  padding: 2px 6px;
  font-size: 0.9em;
  font-family: 'SFMono-Regular', Consolas, monospace;
}
.article-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  justify-content: center;
  margin: 48px auto 0;
  padding-top: 28px;
  border-top: 1px solid var(--color-border);
  max-width: 720px;
}
.article-tags .tag {
  background: var(--color-surface-accent);
  color: var(--color-primary);
  font-size: 13px;
  font-weight: 500;
  padding: 6px 14px;
  border-radius: 8px;
  transition: all var(--transition);
}
.article-tags .tag:hover {
  background: var(--color-primary);
  color: #fff;
}
.not-found-box {
  text-align: center;
  padding: 80px 24px;
  background: var(--color-surface);
  border-radius: var(--radius-card);
  border: 1px dashed var(--color-border);
  box-shadow: var(--shadow-card);
}
.not-found-box h1 {
  font-family: var(--font-heading);
  font-size: 30px;
  font-weight: 700;
  margin-bottom: 12px;
}
.not-found-box p {
  color: var(--color-text-secondary);
  margin-bottom: 24px;
}
.related-section {
  background: var(--color-surface);
  border-top: 1px solid var(--color-border);
  padding: 64px 0;
}
.related-section-title {
  font-family: var(--font-heading);
  font-size: 28px;
  font-weight: 700;
  text-align: center;
  margin-bottom: 36px;
  position: relative;
}
.related-section-title::after {
  content: '';
  display: block;
  width: 48px;
  height: 3px;
  background: var(--color-primary);
  margin: 12px auto 0;
  border-radius: 2px;
}
.related-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  max-width: 960px;
  margin: 0 auto;
}
.related-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-card);
  overflow: hidden;
  box-shadow: var(--shadow-card);
  transition: all var(--transition);
  text-decoration: none;
  color: inherit;
  display: flex;
  flex-direction: column;
}
.related-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-card-hover);
  border-color: var(--color-primary);
}
.related-card img {
  width: 100%;
  height: 170px;
  object-fit: cover;
}
.related-card .related-body {
  padding: 20px;
  flex: 1;
  display: flex;
  flex-direction: column;
}
.related-card h3 {
  font-family: var(--font-heading);
  font-size: 17px;
  font-weight: 700;
  line-height: 1.5;
  margin-bottom: 10px;
  color: var(--color-text);
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.related-date {
  font-size: 13px;
  color: var(--color-text-secondary);
  margin-bottom: 8px;
}
.related-more {
  margin-top: auto;
  color: var(--color-primary);
  font-size: 14px;
  font-weight: 600;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  transition: gap var(--transition);
}
.related-card:hover .related-more {
  gap: 10px;
}
.related-empty {
  max-width: 960px;
  margin: 0 auto;
  text-align: center;
  padding: 48px 24px;
  background: var(--color-bg);
  border-radius: var(--radius-card);
  border: 1px dashed var(--color-border);
  color: var(--color-text-secondary);
  font-size: 15px;
}
.related-empty i {
  color: var(--color-accent);
  font-size: 26px;
  margin-bottom: 12px;
}
.article-back {
  text-align: center;
  padding: 48px 0 72px;
  background: var(--color-bg);
  border-top: 1px solid var(--color-border);
}
.back-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: var(--color-primary);
  font-size: 15px;
  font-weight: 600;
  padding: 12px 28px;
  border: 1.5px solid var(--color-primary);
  border-radius: var(--radius-btn);
  transition: all var(--transition);
}
.back-link:hover {
  background: rgba(154, 107, 69, 0.06);
  transform: translateY(-2px);
}
.site-footer {
  background: var(--color-footer);
  color: #C9C0B4;
  padding: 56px 0 0;
}
.footer-top {
  display: grid;
  grid-template-columns: 2fr 1fr;
  gap: 40px;
  padding-bottom: 48px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}
.footer-brand-name {
  font-family: var(--font-heading);
  font-size: 22px;
  font-weight: 700;
  color: #fff;
  margin-bottom: 12px;
}
.footer-desc {
  font-size: 14px;
  line-height: 1.8;
  max-width: 480px;
  color: #A69B8E;
}
.footer-links {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px 24px;
  align-content: start;
}
.footer-links a {
  font-size: 14px;
  color: #C9C0B4;
  transition: color var(--transition);
}
.footer-links a:hover {
  color: var(--color-accent);
}
.footer-bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px;
  padding: 20px 0;
  font-size: 13px;
  color: #8A8074;
}
@media (max-width: 768px) {
  .desktop-nav {
    display: none;
  }
  .mobile-menu-btn {
    display: block;
  }
  .article-main {
    padding: 36px 0 48px;
  }
  .article-layout {
    padding-inline: 0;
  }
  .article-title {
    font-size: 28px;
  }
  .article-cover {
    border-radius: 12px;
    margin-bottom: 28px;
  }
  .article-content {
    font-size: 15px;
  }
  .article-content h2 {
    font-size: 22px;
  }
  .related-grid {
    grid-template-columns: 1fr;
    gap: 16px;
  }
  .related-section {
    padding: 48px 0;
  }
  .related-card img {
    height: 180px;
  }
  .footer-top {
    grid-template-columns: 1fr;
    gap: 28px;
    padding-bottom: 32px;
  }
  .footer-bottom {
    flex-direction: column;
    text-align: center;
  }
  .breadcrumb-bar .current {
    max-width: 180px;
  }
}
@media (max-width: 520px) {
  .container {
    padding-inline: 14px;
  }
  .article-main {
    padding: 28px 0 40px;
  }
  .article-title {
    font-size: 24px;
    line-height: 1.35;
  }
  .article-meta {
    gap: 8px 12px;
    font-size: 13px;
  }
  .article-content {
    font-size: 15px;
    line-height: 1.75;
  }
  .article-content h2 {
    font-size: 21px;
  }
  .article-content h3 {
    font-size: 18px;
  }
  .article-tags {
    gap: 8px;
  }
  .related-card h3 {
    font-size: 16px;
  }
  .footer-links {
    grid-template-columns: 1fr 1fr;
  }
}