/* roulang page: index */
:root {
  --primary: #1F3D33;
  --primary-light: #2A5244;
  --primary-dark: #172E28;
  --gold: #C9A063;
  --gold-light: #E9B949;
  --gold-dark: #A8853F;
  --bg: #FAF7F0;
  --bg-deep: #172E28;
  --text: #1D2A26;
  --text-secondary: #6E7773;
  --text-light: #F5F0E8;
  --accent: #C4533B;
  --border: #E4DDD0;
  --border-gold: rgba(201, 160, 99, 0.35);
  --radius: 14px;
  --radius-sm: 8px;
  --shadow-card: 0 4px 0 rgba(0, 0, 0, 0.08), 0 12px 24px rgba(0, 0, 0, 0.06);
  --shadow-hover: 0 6px 0 rgba(0, 0, 0, 0.09), 0 16px 32px rgba(0, 0, 0, 0.08);
  --shadow-btn: 0 4px 0 rgba(0, 0, 0, 0.15);
  --shadow-btn-hover: 0 6px 0 rgba(0, 0, 0, 0.15);
  --transition: all 0.25s ease;
  --container: 1240px;
  --section-space: 80px;
}
*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}
html {
  scroll-behavior: smooth;
}
body {
  font-family: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans CJK SC", sans-serif;
  font-size: 16px;
  line-height: 1.75;
  color: var(--text);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
}
a {
  color: var(--primary);
  text-decoration: none;
  transition: var(--transition);
}
a:hover {
  color: var(--gold-dark);
}
img {
  max-width: 100%;
  display: block;
  height: auto;
}
button,
input,
textarea,
select {
  font-family: inherit;
  font-size: inherit;
  border: none;
  outline: none;
  background: none;
}
ul,
ol {
  list-style: none;
}
.container {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 24px;
}
section {
  padding: var(--section-space) 0;
}
.section-header {
  text-align: center;
  margin-bottom: 48px;
}
.section-tag {
  display: inline-block;
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--gold-dark);
  background: rgba(201, 160, 99, 0.12);
  border: 1px solid var(--border-gold);
  padding: 4px 16px;
  border-radius: 30px;
  margin-bottom: 12px;
}
.section-header h2 {
  font-size: 32px;
  font-weight: 700;
  color: var(--text);
  line-height: 1.3;
  margin-bottom: 8px;
}
.section-header p {
  color: var(--text-secondary);
  font-size: 15px;
  max-width: 600px;
  margin: 0 auto;
}
/* ===== Header / Nav ===== */
.site-header {
  background: var(--bg-deep);
  border-bottom: 3px solid var(--gold);
  position: sticky;
  top: 0;
  z-index: 100;
  box-shadow: 0 2px 12px rgba(0, 0, 0, 0.2);
}
.nav-container {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
  position: relative;
}
.nav-left,
.nav-right {
  display: flex;
  align-items: center;
  gap: 32px;
}
.nav-left .nav-link,
.nav-right .nav-link {
  color: rgba(255, 255, 255, 0.85);
  font-size: 15px;
  font-weight: 500;
  letter-spacing: 0.02em;
  padding: 6px 2px;
  border-bottom: 2px solid transparent;
  transition: var(--transition);
}
.nav-left .nav-link:hover,
.nav-right .nav-link:hover {
  color: var(--gold-light);
  border-bottom-color: var(--gold-light);
}
.nav-left .nav-link.active,
.nav-right .nav-link.active {
  color: var(--gold-light);
  border-bottom-color: var(--gold-light);
}
.nav-logo {
  position: absolute;
  left: 50%;
  transform: translateX(-50%);
  text-align: center;
  font-size: 22px;
  font-weight: 800;
  letter-spacing: 0.08em;
  color: #fff;
  line-height: 1.2;
}
.nav-logo .logo-sub {
  display: block;
  font-size: 10px;
  font-weight: 400;
  letter-spacing: 0.4em;
  color: var(--gold);
  text-transform: uppercase;
  margin-top: 2px;
}
.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  padding: 8px;
  background: transparent;
  border: none;
}
.nav-toggle span {
  width: 24px;
  height: 2px;
  background: #fff;
  border-radius: 2px;
  transition: var(--transition);
}
/* Mobile drawer */
.mobile-drawer {
  display: none;
  position: fixed;
  top: 72px;
  left: 0;
  right: 0;
  background: var(--bg-deep);
  padding: 16px 24px 24px;
  z-index: 99;
  box-shadow: 0 12px 24px rgba(0, 0, 0, 0.3);
  border-top: 1px solid rgba(255, 255, 255, 0.08);
}
.mobile-drawer.open {
  display: block;
}
.mobile-drawer a {
  display: block;
  color: rgba(255, 255, 255, 0.9);
  padding: 12px 0;
  font-size: 16px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
}
.mobile-drawer a:last-child {
  border-bottom: none;
}
.mobile-drawer a:hover {
  color: var(--gold-light);
  padding-left: 8px;
}
/* ===== Buttons ===== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 14px 32px;
  border-radius: var(--radius-sm);
  font-size: 15px;
  font-weight: 600;
  letter-spacing: 0.04em;
  cursor: pointer;
  transition: var(--transition);
  border: 2px solid transparent;
  line-height: 1.4;
  text-align: center;
}
.btn-primary {
  background: var(--gold);
  color: var(--primary-dark);
  border-color: var(--gold);
  box-shadow: var(--shadow-btn);
}
.btn-primary:hover {
  background: var(--gold-light);
  border-color: var(--gold-light);
  color: var(--primary-dark);
  transform: translateY(-2px);
  box-shadow: var(--shadow-btn-hover);
}
.btn-primary:active {
  transform: translateY(1px);
  box-shadow: 0 2px 0 rgba(0, 0, 0, 0.15);
}
.btn-primary:focus-visible {
  outline: 2px solid var(--gold-light);
  outline-offset: 2px;
}
.btn-outline {
  background: transparent;
  color: #fff;
  border-color: rgba(255, 255, 255, 0.5);
}
.btn-outline:hover {
  border-color: var(--gold-light);
  color: var(--gold-light);
  transform: translateY(-2px);
}
.btn-outline:active {
  transform: translateY(1px);
}
.btn-outline:focus-visible {
  outline: 2px solid var(--gold-light);
  outline-offset: 2px;
}
.btn-large {
  padding: 16px 48px;
  font-size: 16px;
}
/* ===== Hero ===== */
.hero {
  position: relative;
  background: var(--bg-deep);
  padding: 0;
  overflow: hidden;
}
.hero-bg {
  position: absolute;
  inset: 0;
  background-image: url('/assets/images/backpic/back-2.jpg');
  background-size: cover;
  background-position: center;
}
.hero-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(23, 46, 40, 0.96) 40%, rgba(23, 46, 40, 0.78) 100%);
}
.hero-pattern {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(201, 160, 99, 0.06) 1px, transparent 1px),
    linear-gradient(90deg, rgba(201, 160, 99, 0.06) 1px, transparent 1px);
  background-size: 40px 40px;
}
.hero-inner {
  position: relative;
  z-index: 2;
  display: flex;
  align-items: center;
  gap: 60px;
  padding: 96px 24px;
  min-height: 560px;
}
.hero-content {
  flex: 1.2;
}
.hero-tag {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(201, 160, 99, 0.15);
  border: 1px solid var(--border-gold);
  border-radius: 30px;
  padding: 5px 16px;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.12em;
  color: var(--gold-light);
  margin-bottom: 20px;
}
.hero-tag .dot {
  width: 6px;
  height: 6px;
  background: var(--gold-light);
  border-radius: 50%;
}
.hero h1 {
  font-size: 42px;
  font-weight: 800;
  line-height: 1.25;
  color: #fff;
  margin-bottom: 16px;
  letter-spacing: 0.02em;
}
.hero-subtitle {
  font-size: 17px;
  line-height: 1.7;
  color: rgba(255, 255, 255, 0.8);
  max-width: 480px;
  margin-bottom: 32px;
}
.hero-actions {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}
.hero-side {
  flex: 0.8;
  display: flex;
  justify-content: center;
}
.countdown-card {
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: var(--radius);
  padding: 32px 28px;
  text-align: center;
  width: 100%;
  max-width: 360px;
  backdrop-filter: blur(4px);
  box-shadow: var(--shadow-card);
}
.countdown-label {
  display: inline-block;
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.08em;
  color: var(--gold-light);
  background: rgba(201, 160, 99, 0.15);
  border-radius: 20px;
  padding: 4px 14px;
  margin-bottom: 20px;
}
.countdown-display {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  margin-bottom: 16px;
}
.countdown-item {
  background: rgba(255, 255, 255, 0.1);
  border-radius: 10px;
  padding: 12px 8px;
  min-width: 60px;
}
.countdown-item span {
  display: block;
  font-size: 32px;
  font-weight: 700;
  color: #fff;
  font-variant-numeric: tabular-nums;
  line-height: 1.2;
}
.countdown-item em {
  display: block;
  font-style: normal;
  font-size: 11px;
  color: rgba(255, 255, 255, 0.6);
  letter-spacing: 0.1em;
  margin-top: 2px;
}
.countdown-sep {
  color: rgba(255, 255, 255, 0.5);
  font-size: 24px;
  font-weight: 700;
}
.countdown-note {
  font-size: 13px;
  color: rgba(255, 255, 255, 0.6);
  line-height: 1.5;
}
/* Hero badges */
.hero-badges {
  position: relative;
  z-index: 2;
  background: rgba(0, 0, 0, 0.25);
  border-top: 1px solid rgba(255, 255, 255, 0.08);
}
.hero-badges-inner {
  display: flex;
  justify-content: space-between;
  padding: 20px 24px;
  gap: 20px;
  flex-wrap: wrap;
}
.hero-badge-item {
  display: flex;
  align-items: center;
  gap: 10px;
  color: #fff;
}
.hero-badge-item span {
  font-size: 28px;
  font-weight: 800;
  color: var(--gold-light);
  font-variant-numeric: tabular-nums;
  line-height: 1;
}
.hero-badge-item em {
  font-style: normal;
  font-size: 13px;
  color: rgba(255, 255, 255, 0.7);
  letter-spacing: 0.06em;
}
/* ===== Metrics Dashboard ===== */
.metrics {
  background: var(--bg-deep);
  color: #fff;
  padding: 64px 0;
}
.metrics .section-tag {
  background: rgba(201, 160, 99, 0.15);
}
.metrics .section-header h2 {
  color: #fff;
}
.metrics .section-header p {
  color: rgba(255, 255, 255, 0.6);
}
.metrics-grid {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 20px;
}
.metric-card {
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: var(--radius);
  padding: 24px 20px;
  text-align: center;
  transition: var(--transition);
}
.metric-card:hover {
  background: rgba(255, 255, 255, 0.09);
  border-color: rgba(201, 160, 99, 0.3);
  transform: translateY(-4px);
}
.metric-icon {
  font-size: 24px;
  display: block;
  margin-bottom: 8px;
}
.metric-number {
  font-size: 36px;
  font-weight: 800;
  color: var(--gold-light);
  font-variant-numeric: tabular-nums;
  line-height: 1.2;
  margin-bottom: 4px;
}
.metric-label {
  font-size: 13px;
  color: rgba(255, 255, 255, 0.7);
  letter-spacing: 0.04em;
  margin-bottom: 12px;
}
.metric-bar {
  height: 3px;
  background: rgba(255, 255, 255, 0.1);
  border-radius: 3px;
  overflow: hidden;
  margin-bottom: 8px;
}
.metric-bar span {
  display: block;
  height: 100%;
  background: linear-gradient(90deg, var(--gold), var(--gold-light));
  border-radius: 3px;
}
.metric-trend {
  font-size: 12px;
  color: rgba(255, 255, 255, 0.5);
  line-height: 1.4;
}
/* ===== Services Matrix ===== */
.services {
  background: var(--bg);
}
.services-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 32px;
}
.service-card {
  background: #fff;
  border-radius: var(--radius);
  box-shadow: var(--shadow-card);
  overflow: hidden;
  transition: var(--transition);
  display: flex;
  flex-direction: column;
}
.service-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-hover);
}
.service-img {
  position: relative;
  aspect-ratio: 16/9;
  overflow: hidden;
}
.service-img img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.4s ease;
}
.service-card:hover .service-img img {
  transform: scale(1.03);
}
.service-img::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(to top, rgba(23, 46, 40, 0.3), transparent);
}
.service-badge {
  position: absolute;
  top: 14px;
  right: 14px;
  z-index: 2;
  background: var(--gold);
  color: var(--primary-dark);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.06em;
  padding: 3px 12px;
  border-radius: 20px;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.2);
}
.service-number {
  position: absolute;
  bottom: 12px;
  left: 16px;
  z-index: 2;
  font-size: 40px;
  font-weight: 800;
  color: rgba(255, 255, 255, 0.8);
  line-height: 1;
  font-variant-numeric: tabular-nums;
  text-shadow: 0 2px 8px rgba(0, 0, 0, 0.3);
}
.service-info {
  padding: 24px;
  flex: 1;
  display: flex;
  flex-direction: column;
}
.service-info h3 {
  font-size: 22px;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 8px;
}
.service-info > p {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.6;
  margin-bottom: 16px;
  flex: 1;
}
.service-params {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  padding-top: 12px;
  border-top: 1px solid var(--border);
}
.service-params span {
  font-size: 13px;
  font-weight: 500;
  color: var(--text);
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 4px 10px;
}
/* ===== Comparison ===== */
.comparison {
  background: var(--bg);
}
.comparison-panel {
  background: #fff;
  border-radius: var(--radius);
  box-shadow: var(--shadow-card);
  padding: 48px;
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  gap: 32px;
  align-items: center;
}
.compare-col {
  padding: 16px;
}
.compare-col.left {
  text-align: right;
}
.compare-col h3 {
  font-size: 18px;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 4px;
}
.compare-col .compare-sub {
  font-size: 13px;
  color: var(--text-secondary);
  margin-bottom: 24px;
}
.compare-col.right h3 {
  color: var(--primary);
}
.compare-list {
  display: flex;
  flex-direction: column;
  gap: 14px;
}
.compare-item {
  display: flex;
  flex-direction: column;
  gap: 4px;
}
.compare-item .dim-label {
  font-size: 13px;
  font-weight: 500;
  color: var(--text-secondary);
}
.compare-rating {
  display: flex;
  gap: 4px;
}
.compare-rating .bar {
  flex: 1;
  height: 6px;
  background: rgba(0, 0, 0, 0.06);
  border-radius: 3px;
  overflow: hidden;
}
.compare-rating .bar span {
  display: block;
  height: 100%;
  border-radius: 3px;
}
.compare-rating .bar span.fill-gold {
  background: linear-gradient(90deg, var(--gold), var(--gold-light));
}
.compare-rating .bar span.fill-green {
  background: linear-gradient(90deg, var(--primary), var(--primary-light));
}
.compare-rating .bar span.fill-gray {
  background: #ccc;
}
.vs-badge {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 72px;
  height: 72px;
  background: var(--bg-deep);
  border: 3px solid var(--gold);
  border-radius: 50%;
  font-size: 20px;
  font-weight: 800;
  color: var(--gold-light);
  letter-spacing: 0.04em;
  box-shadow: var(--shadow-btn);
}
/* ===== News Section ===== */
.news-section {
  background: var(--bg);
}
.news-section .section-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  text-align: left;
  margin-bottom: 32px;
}
.news-section .section-header .header-left {
  text-align: left;
}
.news-section .section-header .header-left h2 {
  margin-bottom: 4px;
}
.news-section .section-header .header-left p {
  margin: 0;
}
.more-link {
  font-size: 14px;
  font-weight: 500;
  color: var(--gold-dark);
  border: 1px solid var(--border-gold);
  padding: 6px 16px;
  border-radius: 20px;
  transition: var(--transition);
}
.more-link:hover {
  background: rgba(201, 160, 99, 0.1);
  color: var(--primary-dark);
}
.news-list {
  display: flex;
  flex-direction: column;
  gap: 20px;
}
.news-item {
  display: flex;
  gap: 20px;
  background: #fff;
  border-radius: var(--radius);
  padding: 20px;
  box-shadow: var(--shadow-card);
  transition: var(--transition);
  align-items: center;
}
.news-item:hover {
  box-shadow: var(--shadow-hover);
  transform: translateX(4px);
}
.news-thumb {
  flex-shrink: 0;
  width: 180px;
  aspect-ratio: 16/10;
  border-radius: var(--radius-sm);
  overflow: hidden;
}
.news-thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.3s ease;
}
.news-item:hover .news-thumb img {
  transform: scale(1.05);
}
.news-content {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 6px;
}
.news-meta-top {
  display: flex;
  gap: 12px;
  align-items: center;
}
.news-category {
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.06em;
  color: var(--gold-dark);
  background: rgba(201, 160, 99, 0.12);
  padding: 2px 10px;
  border-radius: 20px;
}
.news-date {
  font-size: 13px;
  color: var(--text-secondary);
}
.news-content h3 {
  font-size: 17px;
  font-weight: 600;
  line-height: 1.4;
  color: var(--text);
}
.news-content h3 a {
  color: var(--text);
}
.news-content h3 a:hover {
  color: var(--primary);
}
.news-excerpt {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.6;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.read-link {
  font-size: 13px;
  font-weight: 600;
  color: var(--primary);
  align-self: flex-start;
}
.read-link:hover {
  color: var(--gold-dark);
}
.empty-state {
  text-align: center;
  padding: 40px 20px;
  color: var(--text-secondary);
  font-size: 15px;
  background: #fff;
  border-radius: var(--radius);
  box-shadow: var(--shadow-card);
}
/* ===== FAQ ===== */
.faq-section {
  background: var(--bg);
}
.faq-list {
  max-width: 820px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 12px;
}
.faq-item {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  transition: var(--transition);
}
.faq-item:hover {
  border-color: var(--border-gold);
  box-shadow: var(--shadow-card);
}
.faq-item summary {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 20px 24px;
  cursor: pointer;
  list-style: none;
  font-size: 16px;
  font-weight: 600;
  color: var(--text);
  transition: var(--transition);
}
.faq-item summary::-webkit-details-marker {
  display: none;
}
.faq-item summary .q-num {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  background: var(--bg-deep);
  color: var(--gold-light);
  border-radius: 8px;
  font-size: 13px;
  font-weight: 700;
  flex-shrink: 0;
  transition: var(--transition);
}
.faq-item summary .faq-icon {
  margin-left: auto;
  font-size: 20px;
  color: var(--text-secondary);
  transition: transform 0.3s ease;
  line-height: 1;
}
.faq-item[open] summary {
  color: var(--primary);
  border-bottom: 1px solid var(--border);
}
.faq-item[open] summary .faq-icon {
  transform: rotate(45deg);
  color: var(--gold-dark);
}
.faq-item[open] summary .q-num {
  background: var(--gold);
  color: var(--primary-dark);
}
.faq-answer {
  padding: 16px 24px 24px;
  color: var(--text-secondary);
  font-size: 15px;
  line-height: 1.7;
  padding-left: 72px;
}
.faq-answer p {
  margin-bottom: 8px;
}
.faq-answer p:last-child {
  margin-bottom: 0;
}
/* ===== Conversion Form / CTA ===== */
.cta-section {
  background: var(--bg-deep);
  position: relative;
  overflow: hidden;
}
.cta-section::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(201, 160, 99, 0.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(201, 160, 99, 0.05) 1px, transparent 1px);
  background-size: 40px 40px;
}
.cta-panel {
  position: relative;
  z-index: 2;
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: 60px;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: var(--radius);
  padding: 56px;
}
.cta-info h2 {
  font-size: 32px;
  color: #fff;
  margin-bottom: 12px;
}
.cta-info > p {
  color: rgba(255, 255, 255, 0.7);
  margin-bottom: 28px;
  font-size: 15px;
}
.cta-note {
  background: rgba(255, 255, 255, 0.06);
  border-left: 3px solid var(--gold);
  padding: 16px 20px;
  border-radius: 0 10px 10px 0;
}
.cta-note ul {
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.cta-note li {
  font-size: 14px;
  color: rgba(255, 255, 255, 0.75);
  display: flex;
  gap: 8px;
  align-items: flex-start;
  line-height: 1.5;
}
.cta-note li::before {
  content: '•';
  color: var(--gold-light);
  font-weight: 700;
  flex-shrink: 0;
}
.cta-form-wrap {
  background: #fff;
  border-radius: var(--radius);
  padding: 32px;
  box-shadow: var(--shadow-card);
}
.form-title {
  font-size: 20px;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 4px;
}
.form-subtitle {
  font-size: 13px;
  color: var(--text-secondary);
  margin-bottom: 24px;
}
.form-group {
  margin-bottom: 18px;
}
.form-group label {
  display: block;
  font-size: 13px;
  font-weight: 600;
  color: var(--text);
  margin-bottom: 6px;
  letter-spacing: 0.02em;
}
.form-group input,
.form-group select,
.form-group textarea {
  width: 100%;
  padding: 12px 14px;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  font-size: 14px;
  color: var(--text);
  background: var(--bg);
  transition: var(--transition);
}
.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  border-color: var(--gold);
  box-shadow: 0 0 0 3px rgba(201, 160, 99, 0.15);
  background: #fff;
  outline: none;
}
.form-group textarea {
  resize: vertical;
  min-height: 80px;
}
.form-submit {
  width: 100%;
}
/* ===== Footer ===== */
.site-footer {
  background: var(--bg-deep);
  color: rgba(255, 255, 255, 0.7);
  padding: 56px 24px 24px;
  border-top: 3px solid var(--gold);
}
.footer-inner {
  max-width: var(--container);
  margin: 0 auto;
  text-align: center;
}
.footer-brand {
  font-size: 26px;
  font-weight: 800;
  color: #fff;
  letter-spacing: 0.1em;
  margin-bottom: 4px;
}
.footer-desc {
  font-size: 14px;
  color: rgba(255, 255, 255, 0.6);
  max-width: 420px;
  margin: 0 auto 24px;
  line-height: 1.6;
}
.footer-nav {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 24px;
  margin-bottom: 24px;
}
.footer-nav a {
  font-size: 14px;
  color: rgba(255, 255, 255, 0.7);
  transition: var(--transition);
}
.footer-nav a:hover {
  color: var(--gold-light);
}
.footer-copy {
  font-size: 13px;
  color: rgba(255, 255, 255, 0.4);
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  padding-top: 16px;
  margin-top: 16px;
}
/* ===== Responsive ===== */
@media (max-width: 1023px) {
  .nav-left,
  .nav-right {
    gap: 16px;
  }
  .nav-left .nav-link,
  .nav-right .nav-link {
    font-size: 14px;
  }
  .hero-inner {
    flex-direction: column;
    padding: 64px 24px;
    gap: 40px;
  }
  .hero-content {
    text-align: center;
  }
  .hero-subtitle {
    margin: 0 auto 24px;
  }
  .hero-actions {
    justify-content: center;
  }
  .countdown-card {
    max-width: 400px;
  }
  .metrics-grid {
    grid-template-columns: repeat(3, 1fr);
    gap: 16px;
  }
  .metric-card:nth-child(4),
  .metric-card:nth-child(5) {
    grid-column: span 1;
  }
  .comparison-panel {
    padding: 32px 24px;
    gap: 20px;
  }
}
@media (max-width: 767px) {
  :root {
    --section-space: 48px;
  }
  .nav-left,
  .nav-right {
    display: none;
  }
  .nav-toggle {
    display: flex;
  }
  .nav-logo {
    font-size: 18px;
  }
  .hero-inner {
    padding: 48px 16px;
  }
  .hero h1 {
    font-size: 28px;
  }
  .hero-subtitle {
    font-size: 15px;
  }
  .hero-actions {
    flex-direction: column;
    align-items: center;
  }
  .hero-actions .btn {
    width: 100%;
    max-width: 280px;
  }
  .hero-badges-inner {
    flex-direction: column;
    align-items: center;
    text-align: center;
    gap: 12px;
    padding: 16px;
  }
  .countdown-card {
    padding: 24px 16px;
  }
  .countdown-item {
    min-width: 50px;
    padding: 8px 4px;
  }
  .countdown-item span {
    font-size: 24px;
  }
  .metrics-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .services-grid {
    grid-template-columns: 1fr;
  }
  .comparison-panel {
    grid-template-columns: 1fr;
    padding: 24px 16px;
    gap: 28px;
  }
  .compare-col.left {
    text-align: left;
  }
  .vs-badge {
    justify-self: center;
    width: 56px;
    height: 56px;
    font-size: 16px;
  }
  .news-item {
    flex-direction: column;
    padding: 16px;
  }
  .news-thumb {
    width: 100%;
    aspect-ratio: 16/9;
  }
  .section-header {
    margin-bottom: 32px;
  }
  .section-header h2 {
    font-size: 24px;
  }
  .cta-panel {
    grid-template-columns: 1fr;
    gap: 32px;
    padding: 32px 20px;
  }
  .cta-info h2 {
    font-size: 26px;
  }
  .faq-answer {
    padding-left: 24px;
  }
  .faq-item summary {
    padding: 16px;
    font-size: 15px;
  }
  .form-submit {
    width: 100%;
  }
  .footer-nav {
    gap: 16px;
  }
  .news-section .section-header {
    flex-direction: column;
    align-items: flex-start;
    gap: 12px;
  }
}
@media (max-width: 520px) {
  .container {
    padding: 0 16px;
  }
  .metrics-grid {
    grid-template-columns: 1fr 1fr;
    gap: 12px;
  }
  .metric-number {
    font-size: 30px;
  }
  .hero-badges-inner {
    flex-direction: row;
    flex-wrap: wrap;
    justify-content: space-around;
  }
  .service-params {
    gap: 6px;
  }
  .service-params span {
    font-size: 12px;
    padding: 3px 8px;
  }
  .cta-form-wrap {
    padding: 20px;
  }
}

/* roulang page: article */
:root {
  --primary: #1F3D33;
  --primary-light: #2D5547;
  --primary-dark: #152921;
  --gold: #C9A063;
  --gold-light: #E9B949;
  --bg: #FAF7F0;
  --bg-dark: #172E28;
  --accent: #C4533B;
  --text-main: #1D2A26;
  --text-secondary: #6E7773;
  --border: #EAE2D4;
  --radius: 12px;
  --shadow-card: 0 4px 0 rgba(0,0,0,0.06), 0 12px 24px rgba(0,0,0,0.05);
  --shadow-hover: 0 6px 0 rgba(0,0,0,0.08), 0 18px 32px rgba(0,0,0,0.07);
  --container: 1200px;
  --section-gap: 64px;
  --font-sans: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
}
*, *::before, *::after { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body {
  font-family: var(--font-sans);
  background: var(--bg);
  color: var(--text-main);
  line-height: 1.75;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; display: block; }
a { color: var(--primary); text-decoration: none; transition: color .2s ease, background .2s ease, border-color .2s ease; }
a:hover { color: var(--gold); }
button { font-family: inherit; cursor: pointer; border: none; background: none; }
input, textarea, select { font-family: inherit; font-size: 16px; }
.container { max-width: var(--container); margin: 0 auto; padding: 0 24px; }
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 14px 36px;
  border-radius: 40px;
  font-size: 16px;
  font-weight: 700;
  line-height: 1;
  letter-spacing: .04em;
  border: 2px solid transparent;
  transition: transform .18s ease, box-shadow .18s ease, background .18s ease, border-color .18s ease, color .18s ease;
  text-decoration: none;
  cursor: pointer;
}
.btn-primary {
  background: var(--gold);
  color: var(--primary-dark);
  box-shadow: 0 4px 0 rgba(0,0,0,.12), 0 8px 20px rgba(201,160,99,.25);
}
.btn-primary:hover {
  background: var(--gold-light);
  color: var(--primary-dark);
  transform: translateY(-2px);
  box-shadow: 0 6px 0 rgba(0,0,0,.1), 0 14px 28px rgba(201,160,99,.3);
}
.btn-primary:focus-visible {
  outline: 2px solid var(--gold);
  outline-offset: 3px;
}
.btn-primary:active {
  transform: translateY(1px);
  box-shadow: 0 2px 0 rgba(0,0,0,.12);
}
.btn-outline {
  background: transparent;
  color: #fff;
  border-color: rgba(255,255,255,.55);
}
.btn-outline:hover {
  border-color: var(--gold-light);
  color: var(--gold-light);
  transform: translateY(-2px);
  background: rgba(255,255,255,.06);
}
.btn-outline:focus-visible {
  outline: 2px solid var(--gold);
  outline-offset: 3px;
}
.btn-outline:active {
  transform: translateY(1px);
}

/* ===== Header / Nav ===== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--primary-dark);
  box-shadow: 0 2px 16px rgba(0,0,0,.25);
  border-bottom: 1px solid rgba(201,160,99,.18);
}
.header-inner {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 70px;
  padding: 0 24px;
}
.main-nav {
  display: flex;
  align-items: center;
  gap: 30px;
}
.main-nav a {
  color: rgba(255,255,255,.72);
  font-size: 15px;
  font-weight: 500;
  letter-spacing: .03em;
  padding: 6px 0;
  border-bottom: 2px solid transparent;
  transition: color .2s, border-color .2s;
}
.main-nav a:hover {
  color: var(--gold-light);
  border-bottom-color: var(--gold);
}
.main-nav a.active {
  color: var(--gold-light);
  border-bottom-color: var(--gold);
}
.nav-left { position: absolute; left: 24px; top: 50%; transform: translateY(-50%); }
.nav-right { position: absolute; right: 24px; top: 50%; transform: translateY(-50%); }
.site-logo {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-size: 24px;
  font-weight: 800;
  color: #fff;
  letter-spacing: .06em;
  text-decoration: none;
  transition: opacity .2s;
}
.site-logo:hover { color: var(--gold-light); opacity: .9; }
.logo-mark {
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--gold), #8a6d3b);
  display: inline-block;
  box-shadow: 0 0 0 2px rgba(201,160,99,.3);
  flex-shrink: 0;
}
.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: 10px;
  z-index: 110;
}
.nav-toggle .bar {
  width: 22px;
  height: 2px;
  background: #fff;
  border-radius: 2px;
  transition: transform .25s, opacity .25s;
}
.nav-toggle[aria-expanded="true"] .bar:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] .bar:nth-child(2) { opacity: 0; }
.nav-toggle[aria-expanded="true"] .bar:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }
.mobile-menu {
  display: none;
  flex-direction: column;
  background: var(--primary-dark);
  padding: 16px 24px 24px;
  gap: 14px;
  border-top: 1px solid rgba(201,160,99,.15);
}
.mobile-menu a {
  color: rgba(255,255,255,.8);
  font-size: 16px;
  padding: 6px 0;
  border-bottom: 1px solid rgba(255,255,255,.08);
}
.mobile-menu a:hover { color: var(--gold-light); }
.mobile-menu.open { display: flex; }

/* ===== Breadcrumb ===== */
.breadcrumb-wrap {
  background: var(--bg);
  padding: 20px 0 0;
  border-bottom: 1px solid var(--border);
}
.breadcrumb {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
  font-size: 14px;
  color: var(--text-secondary);
}
.breadcrumb a {
  color: var(--primary);
  font-weight: 500;
}
.breadcrumb a:hover { color: var(--gold); }
.breadcrumb .sep {
  color: #B0A890;
  font-size: 14px;
}
.breadcrumb .current {
  color: var(--text-secondary);
  max-width: 460px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

/* ===== Article Hero ===== */
.article-hero {
  position: relative;
  background-size: cover;
  background-position: center;
  padding: 80px 0 72px;
  color: #fff;
}
.article-hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(21,41,33,.92) 0%, rgba(31,61,51,.78) 55%, rgba(21,41,33,.88) 100%);
  z-index: 1;
}
.article-hero::after {
  content: '';
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(255,255,255,.025) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,.025) 1px, transparent 1px);
  background-size: 42px 42px;
  z-index: 1;
  pointer-events: none;
}
.article-hero-inner {
  position: relative;
  z-index: 2;
  max-width: 820px;
  margin: 0 auto;
  text-align: center;
}
.article-category {
  display: inline-block;
  padding: 6px 16px;
  background: rgba(201,160,99,.15);
  border: 1px solid rgba(201,160,99,.5);
  border-radius: 100px;
  font-size: 13px;
  font-weight: 600;
  letter-spacing: .1em;
  color: var(--gold-light);
  text-transform: uppercase;
  margin-bottom: 20px;
}
.article-title {
  font-size: 38px;
  line-height: 1.3;
  font-weight: 800;
  margin: 0 0 18px;
  color: #fff;
  letter-spacing: .02em;
  text-shadow: 0 2px 12px rgba(0,0,0,.35);
}
.article-meta {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 14px;
  font-size: 14px;
  color: rgba(255,255,255,.7);
  flex-wrap: wrap;
}
.article-meta .meta-item {
  display: inline-flex;
  align-items: center;
  gap: 6px;
}
.article-meta .meta-dot {
  color: rgba(255,255,255,.35);
}

/* ===== Article Body ===== */
.article-main {
  padding: 56px 0 72px;
}
.article-body {
  max-width: 780px;
  margin: 0 auto;
  font-size: 17px;
  line-height: 1.8;
  color: var(--text-main);
}
.article-body > *:first-child { margin-top: 0; }
.article-body h2 {
  font-size: 26px;
  font-weight: 700;
  color: var(--primary);
  margin: 2em 0 .8em;
  padding-bottom: 10px;
  border-bottom: 2px solid var(--gold);
  letter-spacing: .02em;
}
.article-body h3 {
  font-size: 20px;
  font-weight: 600;
  color: var(--primary);
  margin: 1.6em 0 .6em;
}
.article-body p {
  margin: 0 0 1.5em;
}
.article-body ul,
.article-body ol {
  margin: 0 0 1.5em;
  padding-left: 1.4em;
}
.article-body li {
  margin-bottom: .45em;
}
.article-body blockquote {
  margin: 2em 0;
  padding: 20px 28px;
  background: rgba(201,160,99,.08);
  border-left: 4px solid var(--gold);
  border-radius: 0 12px 12px 0;
  font-style: normal;
  color: var(--text-main);
}
.article-body blockquote p { margin: 0 0 .5em; }
.article-body blockquote p:last-child { margin-bottom: 0; }
.article-body img {
  border-radius: var(--radius);
  margin: 1.5em auto;
  box-shadow: var(--shadow-card);
}
.article-body a {
  color: var(--primary);
  text-decoration: underline;
  text-underline-offset: 3px;
}
.article-body a:hover { color: var(--gold); text-decoration-thickness: 2px; }
.article-body code {
  background: rgba(0,0,0,.05);
  padding: 2px 6px;
  border-radius: 4px;
  font-size: .9em;
}
.article-body hr {
  border: none;
  border-top: 1px solid var(--border);
  margin: 2em 0;
}

/* ===== Related ===== */
.related-section {
  background: #F3EDE1;
  padding: 72px 0;
  border-top: 1px solid var(--border);
}
.section-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 36px;
  position: relative;
}
.section-head h2 {
  font-size: 30px;
  font-weight: 800;
  color: var(--primary);
  margin: 0;
  padding-left: 18px;
  position: relative;
  letter-spacing: .03em;
}
.section-head h2::before {
  content: '';
  position: absolute;
  left: 0;
  top: 50%;
  transform: translateY(-50%);
  width: 5px;
  height: 26px;
  background: var(--gold);
  border-radius: 4px;
}
.section-head .more-link {
  font-size: 14px;
  font-weight: 600;
  color: var(--primary);
  letter-spacing: .04em;
}
.section-head .more-link:hover { color: var(--gold); }
.related-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}
.related-card {
  background: #fff;
  border-radius: 14px;
  overflow: hidden;
  box-shadow: var(--shadow-card);
  transition: transform .2s ease, box-shadow .2s ease;
  display: block;
  color: var(--text-main);
  border: 1px solid rgba(0,0,0,.03);
}
.related-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-hover);
  color: var(--text-main);
}
.related-card img {
  width: 100%;
  height: 170px;
  object-fit: cover;
  transition: transform .3s ease;
}
.related-card:hover img {
  transform: scale(1.03);
}
.related-card-body {
  padding: 22px 22px 24px;
}
.related-card-body h3 {
  font-size: 18px;
  font-weight: 700;
  margin: 0 0 8px;
  color: var(--primary);
  line-height: 1.4;
}
.related-card-body p {
  font-size: 14px;
  color: var(--text-secondary);
  margin: 0 0 12px;
  line-height: 1.65;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.related-card-body .read-more {
  font-size: 13px;
  font-weight: 600;
  color: var(--gold);
  letter-spacing: .05em;
}

/* ===== Back Home ===== */
.back-home-wrap {
  text-align: center;
  padding: 48px 24px 72px;
  background: var(--bg);
}

/* ===== Not Found ===== */
.not-found-wrap {
  padding: 120px 24px;
  text-align: center;
  background: var(--bg);
  min-height: 60vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
}
.not-found-wrap h1 {
  font-size: 32px;
  color: var(--primary);
  margin-bottom: 12px;
}
.not-found-wrap p {
  color: var(--text-secondary);
  margin-bottom: 32px;
}

/* ===== Footer ===== */
.site-footer {
  background: var(--primary-dark);
  color: rgba(255,255,255,.75);
  padding: 60px 0 32px;
  border-top: 3px solid var(--gold);
  position: relative;
  overflow: hidden;
}
.site-footer::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(255,255,255,.02) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,.02) 1px, transparent 1px);
  background-size: 50px 50px;
  pointer-events: none;
}
.footer-inner {
  position: relative;
  z-index: 1;
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 24px;
  text-align: center;
}
.footer-brand {
  font-size: 28px;
  font-weight: 800;
  color: #fff;
  letter-spacing: .08em;
  margin-bottom: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
}
.footer-brand .logo-mark {
  width: 22px;
  height: 22px;
  background: linear-gradient(135deg, var(--gold-light), #8a6d3b);
}
.footer-desc {
  max-width: 520px;
  margin: 0 auto 28px;
  font-size: 14px;
  line-height: 1.7;
  color: rgba(255,255,255,.55);
}
.footer-nav {
  display: flex;
  justify-content: center;
  gap: 24px;
  flex-wrap: wrap;
  margin-bottom: 36px;
}
.footer-nav a {
  color: rgba(255,255,255,.65);
  font-size: 14px;
  font-weight: 500;
  letter-spacing: .04em;
  padding: 4px 0;
  border-bottom: 1px solid transparent;
  transition: color .2s, border-color .2s;
}
.footer-nav a:hover {
  color: var(--gold-light);
  border-bottom-color: var(--gold);
}
.footer-copy {
  font-size: 13px;
  color: rgba(255,255,255,.4);
  margin: 0;
  padding-top: 24px;
  border-top: 1px solid rgba(255,255,255,.08);
}

/* ===== Responsive ===== */
@media (max-width: 1023px) {
  .nav-left { display: none; }
  .nav-right { display: none; }
  .nav-toggle {
    display: flex;
    position: absolute;
    left: 16px;
    top: 50%;
    transform: translateY(-50%);
  }
  .mobile-menu { display: none; }
  .mobile-menu.open { display: flex; }
  .header-inner { justify-content: center; }
  .related-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .article-title {
    font-size: 32px;
  }
}
@media (max-width: 767px) {
  .container { padding: 0 18px; }
  .article-hero {
    padding: 56px 18px 48px;
  }
  .article-title {
    font-size: 28px;
  }
  .article-meta {
    gap: 8px;
    font-size: 13px;
  }
  .article-main {
    padding: 36px 0 48px;
  }
  .article-body {
    font-size: 16px;
    line-height: 1.75;
  }
  .article-body h2 {
    font-size: 22px;
  }
  .related-grid {
    grid-template-columns: 1fr;
    gap: 20px;
  }
  .section-head h2 {
    font-size: 24px;
  }
  .back-home-wrap {
    padding: 40px 18px 56px;
  }
  .related-section {
    padding: 48px 0;
  }
  .site-footer {
    padding: 48px 0 28px;
  }
  .footer-nav {
    gap: 14px;
  }
  .footer-nav a {
    font-size: 13px;
  }
  .breadcrumb .current {
    max-width: 220px;
  }
}