/* roulang page: index */
:root {
  --primary: #1F5F4B;
  --primary-dark: #174737;
  --primary-active: #123A2D;
  --accent: #C3A06E;
  --accent-dark: #A98A5A;
  --bg-warm: #F7F5F2;
  --dark-block: #16211C;
  --text-main: #1D2221;
  --text-muted: #6C7470;
  --border-color: rgba(31, 95, 75, 0.12);
  --divider: rgba(0, 0, 0, 0.08);
  --radius-btn: 6px;
  --radius-card: 8px;
  --radius-img: 4px;
  --shadow-card: 0 2px 8px rgba(27, 38, 33, 0.04);
  --shadow-hover: 0 8px 24px rgba(27, 38, 33, 0.08);
  --container-width: 1200px;
  --space-section: 112px;
  --space-section-mobile: 60px;
  --transition: 0.3s ease-out;
  --font-sans: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", "Helvetica Neue", Arial, sans-serif;
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}
html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}
body {
  font-family: var(--font-sans);
  background: var(--bg-warm);
  color: var(--text-main);
  line-height: 1.75;
  font-size: 16px;
  overflow-x: hidden;
}
a {
  color: var(--primary);
  text-decoration: none;
  transition: color 0.2s ease-out;
}
a:hover {
  color: var(--primary-dark);
}
img {
  max-width: 100%;
  display: block;
}
button {
  font-family: inherit;
  border: none;
  cursor: pointer;
  background: none;
}
ul {
  list-style: none;
}
.container {
  max-width: var(--container-width);
  margin: 0 auto;
  padding-left: 24px;
  padding-right: 24px;
}
.section-head {
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
  margin-bottom: 48px;
  flex-wrap: wrap;
  gap: 16px;
}
.section-head h2 {
  font-size: 30px;
  font-weight: 700;
  letter-spacing: -0.01em;
  line-height: 1.25;
  color: var(--text-main);
  position: relative;
}
.section-head h2::before {
  content: "";
  display: inline-block;
  width: 4px;
  height: 24px;
  background: var(--accent);
  border-radius: 2px;
  margin-right: 12px;
  vertical-align: -3px;
}
.section-head p {
  color: var(--text-muted);
  font-size: 15px;
  margin-top: 8px;
}
.section-head a.link-all {
  font-size: 14px;
  font-weight: 600;
  color: var(--primary);
  padding: 8px 16px;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-btn);
  transition: all 0.25s ease-out;
}
.section-head a.link-all:hover {
  background: var(--primary);
  color: #fff;
  border-color: var(--primary);
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  height: 48px;
  padding: 0 32px;
  border-radius: var(--radius-btn);
  font-size: 15px;
  font-weight: 600;
  letter-spacing: 0.02em;
  transition: all 0.25s ease-out;
  white-space: nowrap;
  border: 1px solid transparent;
}
.btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 16px rgba(31, 95, 75, 0.15);
}
.btn:active {
  transform: translateY(0);
  box-shadow: none;
}
.btn:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
}
.btn-primary {
  background: var(--primary);
  color: #fff;
}
.btn-primary:hover {
  background: var(--primary-dark);
  color: #fff;
}
.btn-primary:active {
  background: var(--primary-active);
}
.btn-outline {
  background: transparent;
  color: var(--primary);
  border-color: var(--primary);
}
.btn-outline:hover {
  background: rgba(31, 95, 75, 0.06);
  border-color: var(--primary-dark);
  color: var(--primary-dark);
}
.btn-gold {
  background: var(--accent);
  color: var(--dark-block);
}
.btn-gold:hover {
  background: var(--accent-dark);
  color: #fff;
}
.btn-gold-outline {
  background: transparent;
  color: var(--accent);
  border-color: var(--accent);
}
.btn-gold-outline:hover {
  background: var(--accent);
  color: var(--dark-block);
}
.btn-sm {
  height: 40px;
  padding: 0 22px;
  font-size: 14px;
}

/* ===== Header & Nav ===== */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  transition: background 0.3s ease-out, box-shadow 0.3s ease-out, backdrop-filter 0.3s ease-out;
  background: transparent;
}
.site-header.scrolled {
  background: rgba(247, 245, 242, 0.88);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  box-shadow: 0 1px 0 var(--divider);
}
.header-inner {
  display: flex;
  align-items: center;
  height: 72px;
  gap: 40px;
  justify-content: space-between;
}
.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
}
.brand-icon {
  width: 36px;
  height: 36px;
}
.brand-name {
  font-size: 20px;
  font-weight: 700;
  color: var(--text-main);
  letter-spacing: -0.01em;
  white-space: nowrap;
}
.brand:hover .brand-name {
  color: var(--primary);
}
.main-nav {
  display: flex;
  align-items: center;
  gap: 8px;
  flex: 1;
  justify-content: center;
}
.nav-tab {
  display: inline-flex;
  align-items: center;
  height: 38px;
  padding: 0 22px;
  border-radius: 999px;
  font-size: 14px;
  font-weight: 500;
  color: var(--text-main);
  transition: all 0.25s ease-out;
  white-space: nowrap;
}
.nav-tab:hover {
  background: rgba(31, 95, 75, 0.08);
  color: var(--primary);
}
.nav-tab.active {
  background: var(--primary);
  color: #fff;
  font-weight: 600;
}
.header-actions {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-shrink: 0;
}
.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  width: 40px;
  height: 40px;
  align-items: center;
  justify-content: center;
  border-radius: 8px;
}
.nav-toggle span {
  display: block;
  width: 20px;
  height: 2px;
  background: var(--text-main);
  border-radius: 2px;
  transition: transform 0.25s ease-out, opacity 0.2s ease-out;
}
.nav-toggle.active span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}
.nav-toggle.active span:nth-child(2) {
  opacity: 0;
}
.nav-toggle.active span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}
.mobile-menu {
  display: none;
  position: fixed;
  top: 72px;
  left: 0;
  right: 0;
  background: var(--bg-warm);
  border-bottom: 1px solid var(--divider);
  padding: 16px 24px 24px;
  flex-direction: column;
  gap: 8px;
  z-index: 999;
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.06);
}
.mobile-menu.open {
  display: flex;
}
.mobile-nav-link {
  display: block;
  padding: 14px 16px;
  border-radius: 8px;
  font-size: 15px;
  font-weight: 500;
  color: var(--text-main);
  transition: background 0.2s ease-out, color 0.2s ease-out;
}
.mobile-nav-link:hover {
  background: rgba(31, 95, 75, 0.06);
  color: var(--primary);
}
.mobile-nav-link.active {
  background: var(--primary);
  color: #fff;
}
.mobile-menu .btn {
  margin-top: 12px;
  width: 100%;
}

/* ===== Hero ===== */
.hero {
  min-height: 92vh;
  display: flex;
  align-items: center;
  background: linear-gradient(115deg, rgba(247, 245, 242, 0.96) 0%, rgba(247, 245, 242, 0.85) 50%, rgba(247, 245, 242, 0.65) 100%), url('/assets/images/backpic/back-1.png') center/cover no-repeat;
  padding: 120px 0 80px;
  position: relative;
}
.hero-inner {
  width: 100%;
}
.hero-content {
  max-width: 680px;
}
.chip {
  display: inline-flex;
  align-items: center;
  height: 28px;
  padding: 0 16px;
  border: 1px solid rgba(31, 95, 75, 0.3);
  border-radius: 999px;
  font-size: 12px;
  font-weight: 600;
  color: var(--primary);
  background: rgba(255, 255, 255, 0.6);
  letter-spacing: 0.04em;
  margin-bottom: 24px;
}
.hero h1 {
  font-size: 52px;
  font-weight: 700;
  line-height: 1.2;
  letter-spacing: -0.01em;
  color: var(--text-main);
  margin-bottom: 20px;
}
.hero-sub {
  font-size: 18px;
  line-height: 1.7;
  color: var(--text-muted);
  max-width: 560px;
  margin-bottom: 36px;
}
.hero-actions {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
  margin-bottom: 56px;
}
.hero-trust {
  display: flex;
  gap: 40px;
  flex-wrap: wrap;
}
.trust-item {
  display: flex;
  flex-direction: column;
  gap: 2px;
}
.trust-item strong {
  font-size: 24px;
  font-weight: 800;
  color: var(--primary);
  line-height: 1.2;
}
.trust-item span {
  font-size: 13px;
  color: var(--text-muted);
}

/* ===== Features ===== */
.features {
  padding: var(--space-section) 0;
  background: var(--bg-warm);
}
.features-head {
  margin-bottom: 56px;
}
.features-head h2 {
  font-size: 32px;
  font-weight: 700;
  letter-spacing: -0.01em;
  margin-bottom: 10px;
}
.features-head p {
  color: var(--text-muted);
  font-size: 15px;
}
.features-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 32px;
}
.feature-card {
  background: #fff;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-card);
  overflow: hidden;
  box-shadow: var(--shadow-card);
  transition: transform 0.3s ease-out, box-shadow 0.3s ease-out;
}
.feature-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-hover);
}
.feature-card img {
  width: 100%;
  height: 200px;
  object-fit: cover;
  border-radius: 0;
}
.feature-wide {
  grid-row: span 2;
  display: flex;
  flex-direction: column;
}
.feature-wide img {
  height: 320px;
}
.feature-body {
  padding: 28px;
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.feature-tag {
  display: inline-flex;
  align-items: center;
  height: 24px;
  padding: 0 12px;
  border-radius: 999px;
  font-size: 12px;
  font-weight: 600;
  background: rgba(31, 95, 75, 0.1);
  color: var(--primary);
  align-self: flex-start;
}
.feature-body h3 {
  font-size: 20px;
  font-weight: 700;
  color: var(--text-main);
  margin-top: 4px;
}
.feature-body p {
  font-size: 14px;
  line-height: 1.7;
  color: var(--text-muted);
  flex: 1;
}
.text-link {
  font-size: 14px;
  font-weight: 600;
  color: var(--primary);
  transition: color 0.2s ease-out;
}
.text-link:hover {
  color: var(--primary-dark);
}

/* ===== Process Section ===== */
.process-section {
  background: var(--dark-block);
  padding: var(--space-section) 0;
  color: #EEF0ED;
}
.process-section .section-head h2 {
  color: #fff;
}
.process-section .section-head p {
  color: rgba(238, 240, 237, 0.7);
}
.process-section .section-head h2::before {
  background: var(--accent);
}
.process-steps {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 32px;
  margin-bottom: 64px;
}
.process-step {
  position: relative;
  padding: 32px 24px;
  background: rgba(255, 255, 255, 0.04);
  border-radius: var(--radius-card);
  border: 1px solid rgba(255, 255, 255, 0.06);
  transition: background 0.3s ease-out, transform 0.3s ease-out;
}
.process-step:hover {
  background: rgba(255, 255, 255, 0.07);
  transform: translateY(-4px);
}
.step-num {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: var(--accent);
  color: var(--dark-block);
  font-size: 14px;
  font-weight: 800;
  margin-bottom: 18px;
}
.process-step h3 {
  font-size: 17px;
  font-weight: 700;
  color: #fff;
  margin-bottom: 8px;
}
.process-step p {
  font-size: 13px;
  line-height: 1.6;
  color: rgba(238, 240, 237, 0.65);
}
.process-bottom {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 56px;
  align-items: center;
  margin-top: 40px;
}
.process-image img {
  width: 100%;
  height: 320px;
  object-fit: cover;
  border-radius: 12px;
  box-shadow: 0 16px 48px rgba(0, 0, 0, 0.3);
}
.process-points ul {
  display: flex;
  flex-direction: column;
  gap: 20px;
  margin-bottom: 32px;
}
.process-points li {
  position: relative;
  padding-left: 28px;
  font-size: 15px;
  line-height: 1.6;
  color: rgba(238, 240, 237, 0.85);
}
.process-points li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 9px;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--accent);
}

/* ===== Social Proof ===== */
.social-proof {
  padding: var(--space-section) 0;
  background: var(--bg-warm);
}
.stats-row {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 32px;
  margin-bottom: 64px;
  text-align: center;
}
.stat-item {
  padding: 32px 16px;
  background: #fff;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-card);
}
.stat-num {
  display: block;
  font-size: 52px;
  font-weight: 900;
  color: var(--accent);
  line-height: 1.1;
  margin-bottom: 8px;
  letter-spacing: -0.01em;
}
.stat-label {
  font-size: 14px;
  color: var(--text-muted);
}
.testimonials {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
}
.testimonial-card {
  background: #F0EFE9;
  border-radius: var(--radius-card);
  padding: 32px 24px;
  position: relative;
  border-left: 2px solid var(--accent);
  display: flex;
  flex-direction: column;
  gap: 16px;
  transition: transform 0.3s ease-out, box-shadow 0.3s ease-out;
}
.testimonial-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-hover);
}
.testimonial-card p {
  font-size: 14px;
  line-height: 1.75;
  color: var(--text-main);
  font-style: normal;
}
.testimonial-author {
  font-size: 13px;
  color: var(--text-muted);
  margin-top: auto;
}

/* ===== Latest News ===== */
.latest-news {
  padding: var(--space-section) 0;
  background: #fff;
}
.news-list {
  display: flex;
  flex-direction: column;
  gap: 20px;
}
.news-card {
  display: grid;
  grid-template-columns: 180px 1fr;
  gap: 24px;
  background: #fff;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-card);
  padding: 24px;
  transition: transform 0.3s ease-out, box-shadow 0.3s ease-out, border-color 0.3s ease-out;
}
.news-card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-hover);
  border-color: rgba(31, 95, 75, 0.25);
}
.news-meta {
  display: flex;
  flex-direction: column;
  gap: 6px;
  border-right: 1px solid var(--divider);
  padding-right: 24px;
  justify-content: center;
}
.news-date {
  font-size: 16px;
  font-weight: 600;
  color: var(--primary);
}
.news-tag {
  display: inline-flex;
  align-items: center;
  align-self: flex-start;
  height: 22px;
  padding: 0 10px;
  border-radius: 999px;
  background: rgba(31, 95, 75, 0.08);
  color: var(--primary);
  font-size: 12px;
  font-weight: 500;
}
.news-title {
  font-size: 18px;
  font-weight: 700;
  color: var(--text-main);
  line-height: 1.4;
  margin-bottom: 6px;
  transition: color 0.2s ease-out;
}
.news-card:hover .news-title {
  color: var(--primary);
}
.news-excerpt {
  font-size: 14px;
  color: var(--text-muted);
  line-height: 1.7;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.news-empty {
  text-align: center;
  padding: 60px 24px;
  border: 2px dashed var(--border-color);
  border-radius: var(--radius-card);
  background: rgba(247, 245, 242, 0.5);
}
.news-empty p {
  font-size: 15px;
  color: var(--text-muted);
  margin-bottom: 20px;
}

/* ===== FAQ ===== */
.faq-section {
  padding: var(--space-section) 0;
  background: var(--bg-warm);
}
.faqhead {
  margin-bottom: 48px;
}
.faqhead h2 {
  font-size: 32px;
  font-weight: 700;
  letter-spacing: -0.01em;
  margin-bottom: 8px;
}
.faqhead p {
  color: var(--text-muted);
  font-size: 15px;
}
.faq-list {
  max-width: 840px;
  margin: 0 auto;
  background: #fff;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-card);
  overflow: hidden;
}
.faq-item {
  border-bottom: 1px solid var(--divider);
}
.faq-item:last-child {
  border-bottom: none;
}
.faq-question {
  display: flex;
  justify-content: space-between;
  align-items: center;
  width: 100%;
  padding: 22px 28px;
  font-size: 16px;
  font-weight: 600;
  color: var(--text-main);
  text-align: left;
  transition: background 0.2s ease-out, color 0.2s ease-out;
}
.faq-question:hover {
  background: rgba(31, 95, 75, 0.04);
  color: var(--primary);
}
.faq-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 28px;
  height: 28px;
  font-size: 20px;
  font-weight: 300;
  border-radius: 50%;
  background: rgba(31, 95, 75, 0.08);
  color: var(--primary);
  transition: transform 0.3s ease-out, background 0.2s ease-out;
  flex-shrink: 0;
  margin-left: 16px;
}
.faq-item.open .faq-icon {
  transform: rotate(45deg);
  background: var(--primary);
  color: #fff;
}
.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.35s ease-out;
}
.faq-item.open .faq-answer {
  max-height: 300px;
}
.faq-answer p {
  padding: 0 28px 24px;
  font-size: 14px;
  line-height: 1.8;
  color: var(--text-muted);
}

/* ===== CTA Section ===== */
.cta-section {
  background: var(--dark-block);
  padding: 96px 0;
  text-align: center;
  position: relative;
  overflow: hidden;
}
.cta-section::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: url('/assets/images/backpic/back-2.png') center/cover no-repeat;
  opacity: 0.12;
}
.cta-section .container {
  position: relative;
  z-index: 1;
}
.cta-section h2 {
  font-size: 36px;
  font-weight: 700;
  color: #fff;
  letter-spacing: -0.01em;
  margin-bottom: 16px;
}
.cta-section p {
  font-size: 16px;
  color: rgba(238, 240, 237, 0.7);
  margin-bottom: 40px;
}

/* ===== Footer ===== */
.site-footer {
  background: var(--dark-block);
  color: rgba(238, 240, 237, 0.75);
  padding: 80px 0 0;
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 0.8fr 0.8fr 1fr;
  gap: 48px;
  padding-bottom: 48px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}
.footer-logo {
  display: inline-block;
  font-size: 22px;
  font-weight: 700;
  color: #fff;
  margin-bottom: 16px;
}
.footer-brand p {
  font-size: 14px;
  line-height: 1.7;
  color: rgba(238, 240, 237, 0.6);
  max-width: 280px;
}
.footer-col h4 {
  font-size: 15px;
  font-weight: 600;
  color: #fff;
  margin-bottom: 20px;
}
.footer-col a,
.footer-col p {
  display: block;
  font-size: 14px;
  color: rgba(238, 240, 237, 0.6);
  line-height: 2.2;
  transition: color 0.2s ease-out;
}
.footer-col a:hover {
  color: var(--accent);
}
.footer-bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 24px 0;
  font-size: 13px;
  color: rgba(238, 240, 237, 0.45);
  flex-wrap: wrap;
  gap: 12px;
}
.footer-bottom a {
  color: rgba(238, 240, 237, 0.45);
  margin-left: 20px;
  transition: color 0.2s ease-out;
}
.footer-bottom a:hover {
  color: var(--accent);
}

/* ===== Fixed CTA Bar ===== */
.fixed-cta {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  height: 72px;
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border-top: 1px solid var(--divider);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 32px;
  z-index: 999;
  transform: translateY(100%);
  transition: transform 0.35s ease-out;
  padding: 0 24px;
}
.fixed-cta.visible {
  transform: translateY(0);
}
.fixed-cta-text {
  font-size: 14px;
  font-weight: 600;
  color: var(--text-main);
}

/* ===== Fade In Animation ===== */
.fade-in {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.5s ease-out, transform 0.5s ease-out;
}
.fade-in.fade-in-view {
  opacity: 1;
  transform: translateY(0);
}

/* ===== Responsive ===== */
@media (max-width: 1024px) {
  :root {
    --space-section: 80px;
  }
  .hero h1 {
    font-size: 42px;
  }
  .features-grid {
    grid-template-columns: 1fr;
  }
  .feature-wide {
    grid-row: auto;
  }
  .process-steps {
    grid-template-columns: 1fr 1fr;
  }
  .process-bottom {
    grid-template-columns: 1fr;
    gap: 40px;
  }
  .testimonials {
    grid-template-columns: 1fr;
  }
  .footer-grid {
    grid-template-columns: 1fr 1fr;
    gap: 32px;
  }
  .stats-row {
    grid-template-columns: 1fr 1fr;
    gap: 16px;
  }
}
@media (max-width: 690px) {
  :root {
    --space-section: 56px;
  }
  .main-nav {
    display: none;
  }
  .nav-toggle {
    display: flex;
  }
  .header-inner {
    height: 64px;
    gap: 16px;
  }
  .brand-name {
    font-size: 17px;
  }
  .brand-icon {
    width: 28px;
    height: 28px;
  }
  .header-actions .btn {
    display: none;
  }
  .hero {
    min-height: auto;
    padding: 110px 0 60px;
  }
  .hero h1 {
    font-size: 32px;
  }
  .hero-sub {
    font-size: 16px;
  }
  .hero-actions {
    flex-direction: column;
    gap: 12px;
  }
  .hero-actions .btn {
    width: 100%;
  }
  .hero-trust {
    gap: 24px;
  }
  .trust-item strong {
    font-size: 20px;
  }
  .process-steps {
    grid-template-columns: 1fr;
    gap: 16px;
  }
  .process-bottom {
    grid-template-columns: 1fr;
    gap: 32px;
  }
  .process-image img {
    height: 200px;
  }
  .stats-row {
    grid-template-columns: 1fr 1fr;
  }
  .stat-num {
    font-size: 36px;
  }
  .news-card {
    grid-template-columns: 1fr;
    gap: 12px;
    padding: 20px;
  }
  .news-meta {
    flex-direction: row;
    align-items: center;
    border-right: none;
    padding-right: 0;
    gap: 12px;
  }
  .section-head {
    flex-direction: column;
    align-items: flex-start;
    margin-bottom: 32px;
  }
  .section-head h2 {
    font-size: 24px;
  }
  .faq-question {
    font-size: 15px;
    padding: 18px 20px;
  }
  .faq-answer p {
    padding: 0 20px 20px;
  }
  .cta-section h2 {
    font-size: 26px;
  }
  .footer-grid {
    grid-template-columns: 1fr;
  }
  .footer-bottom {
    flex-direction: column;
    align-items: flex-start;
    padding: 16px 0;
  }
  .fixed-cta {
    height: 60px;
    gap: 16px;
    padding: 0 16px;
    padding-bottom: env(safe-area-inset-bottom);
  }
  .fixed-cta-text {
    font-size: 13px;
  }
  .fixed-cta .btn {
    height: 40px;
    padding: 0 20px;
    font-size: 13px;
  }
}

/* roulang page: category1 */
:root {
  --primary: #1F5F4B;
  --primary-dark: #174737;
  --primary-active: #123A2D;
  --accent: #C3A06E;
  --accent-light: #E3CFA8;
  --bg-cream: #F7F5F2;
  --bg-ink: #16211C;
  --text-main: #1D2221;
  --text-muted: #6C7470;
  --border: rgba(31, 95, 75, 0.12);
  --divider: rgba(0, 0, 0, 0.08);
  --radius-btn: 6px;
  --radius-card: 8px;
  --radius-img: 4px;
  --shadow-card: 0 2px 8px rgba(27, 38, 33, 0.04);
  --shadow-hover: 0 8px 24px rgba(27, 38, 33, 0.08);
  --shadow-cta: 0 4px 16px rgba(31, 95, 75, 0.24);
  --container: 1200px;
  --space-section: 112px;
  --space-section-mobile: 64px;
  --transition: 0.25s ease-out;
  --font-sans: "PingFang SC", "Microsoft YaHei", "Source Han Sans SC", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  --font-num: "Inter", "Roboto", var(--font-sans);
}
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}
html {
  scroll-behavior: smooth;
}
body {
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.7;
  color: var(--text-main);
  background: var(--bg-cream);
  -webkit-font-smoothing: antialiased;
}
img {
  max-width: 100%;
  display: block;
}
a {
  color: var(--primary);
  text-decoration: none;
  transition: color var(--transition);
}
a:hover {
  color: var(--primary-dark);
}
a:focus-visible, button:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}
.container {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 24px;
}
.section {
  padding: var(--space-section) 0;
}
.section-head {
  margin-bottom: 48px;
  max-width: 680px;
}
.section-head.center {
  margin-left: auto;
  margin-right: auto;
  text-align: center;
}
.section-head h2 {
  font-size: 32px;
  font-weight: 700;
  line-height: 1.28;
  letter-spacing: -0.01em;
  color: var(--text-main);
}
.section-head .lead {
  margin-top: 14px;
  font-size: 16px;
  color: var(--text-muted);
  line-height: 1.8;
}
.chip-line {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 16px;
}
.chip {
  display: inline-flex;
  align-items: center;
  height: 28px;
  padding: 0 14px;
  border: 1px solid rgba(31, 95, 75, 0.3);
  border-radius: 999px;
  color: var(--primary);
  font-size: 12px;
  font-weight: 600;
  background: rgba(255, 255, 255, 0.55);
  white-space: nowrap;
}
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  height: 46px;
  padding: 0 28px;
  border-radius: var(--radius-btn);
  font-size: 15px;
  font-weight: 600;
  font-family: var(--font-sans);
  border: 1px solid transparent;
  cursor: pointer;
  transition: all var(--transition);
  line-height: 1;
}
.btn-primary {
  background: var(--primary);
  color: #fff;
}
.btn-primary:hover {
  background: var(--primary-dark);
  color: #fff;
  transform: translateY(-1px);
  box-shadow: var(--shadow-cta);
}
.btn-primary:active {
  background: var(--primary-active);
  transform: translateY(0);
}
.btn-outline {
  background: transparent;
  color: var(--primary);
  border-color: var(--primary);
}
.btn-outline:hover {
  background: rgba(31, 95, 75, 0.06);
  color: var(--primary-dark);
  transform: translateY(-1px);
}
.btn-gold {
  background: transparent;
  color: var(--accent);
  border-color: var(--accent);
}
.btn-gold:hover {
  background: rgba(195, 160, 110, 0.1);
  color: var(--accent-light);
  border-color: var(--accent-light);
  transform: translateY(-1px);
}
/* Header */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  transition: background .3s ease, box-shadow .3s ease, backdrop-filter .3s ease;
  background: transparent;
}
.site-header.scrolled {
  background: rgba(247, 245, 242, 0.92);
  backdrop-filter: saturate(180%) blur(14px);
  -webkit-backdrop-filter: saturate(180%) blur(14px);
  box-shadow: 0 1px 0 rgba(0, 0, 0, 0.06);
}
.header-inner {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
}
.logo {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-size: 20px;
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--text-main);
  white-space: nowrap;
}
.logo:hover {
  color: var(--primary);
}
.logo-icon {
  width: 34px;
  height: 34px;
  flex-shrink: 0;
}
.logo-icon svg {
  width: 100%;
  height: 100%;
  display: block;
}
.main-nav {
  display: flex;
  align-items: center;
  gap: 6px;
  margin-left: 48px;
}
.nav-tab {
  padding: 8px 18px;
  border-radius: 999px;
  font-size: 14px;
  font-weight: 600;
  color: var(--text-main);
  border: 1px solid transparent;
  transition: all var(--transition);
  white-space: nowrap;
}
.nav-tab:hover {
  background: rgba(31, 95, 75, 0.08);
  color: var(--primary);
}
.nav-tab.active {
  background: var(--primary);
  color: #fff;
}
.nav-tab.active:hover {
  background: var(--primary);
  color: #fff;
}
.header-cta {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  height: 42px;
  padding: 0 20px;
  background: var(--primary);
  color: #fff;
  border-radius: var(--radius-btn);
  font-size: 14px;
  font-weight: 600;
  transition: all var(--transition);
  white-space: nowrap;
}
.header-cta:hover {
  background: var(--primary-dark);
  color: #fff;
  box-shadow: var(--shadow-cta);
  transform: translateY(-1px);
}
.mobile-toggle {
  display: none;
  width: 42px;
  height: 42px;
  border: 1px solid var(--border);
  border-radius: var(--radius-btn);
  background: #fff;
  cursor: pointer;
  align-items: center;
  justify-content: center;
  gap: 5px;
  flex-direction: column;
}
.mobile-toggle span {
  display: block;
  width: 18px;
  height: 2px;
  background: var(--text-main);
  border-radius: 2px;
  transition: all .3s ease;
}
.mobile-toggle.open span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}
.mobile-toggle.open span:nth-child(2) {
  opacity: 0;
}
.mobile-toggle.open span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}
/* Hero */
.page-hero {
  position: relative;
  min-height: 300px;
  padding: 176px 0 72px;
  background: url('/assets/images/backpic/back-2.png') center center / cover no-repeat;
  display: flex;
  align-items: center;
  overflow: hidden;
}
.page-hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(90deg, rgba(247, 245, 242, 0.97) 0%, rgba(247, 245, 242, 0.85) 45%, rgba(247, 245, 242, 0.4) 100%);
}
.hero-content {
  position: relative;
  z-index: 2;
  max-width: 680px;
}
.hero-breadcrumb {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  color: var(--text-muted);
  margin-bottom: 18px;
}
.hero-breadcrumb a {
  color: var(--text-muted);
}
.hero-breadcrumb a:hover {
  color: var(--primary);
}
.hero-breadcrumb .sep {
  color: rgba(0, 0, 0, 0.25);
}
.page-hero h1 {
  font-size: 48px;
  font-weight: 700;
  line-height: 1.25;
  letter-spacing: -0.01em;
  color: var(--text-main);
  margin-top: 4px;
}
.page-hero .hero-sub {
  margin-top: 16px;
  font-size: 16px;
  line-height: 1.8;
  color: var(--text-muted);
  max-width: 560px;
}
.hero-actions {
  margin-top: 32px;
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
}
.hero-trust {
  margin-top: 36px;
  display: flex;
  gap: 32px;
  flex-wrap: wrap;
}
.trust-item {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  color: var(--text-muted);
}
.trust-item .trust-icon {
  width: 20px;
  height: 20px;
  color: var(--primary);
  flex-shrink: 0;
}
/* Feature split */
.feature-section {
  background: var(--bg-cream);
}
.feature-split {
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  gap: 72px;
  align-items: start;
}
.feature-head h2 {
  font-size: 32px;
  font-weight: 700;
  line-height: 1.28;
  letter-spacing: -0.01em;
}
.feature-head .lead {
  margin-top: 20px;
  font-size: 17px;
  line-height: 1.75;
  color: var(--text-muted);
}
.feature-stack {
  display: grid;
  gap: 20px;
}
.feature-item {
  display: flex;
  gap: 20px;
  padding: 24px;
  background: #fff;
  border: 1px solid var(--border);
  border-radius: var(--radius-card);
  box-shadow: var(--shadow-card);
  transition: all var(--transition);
}
.feature-item:hover {
  box-shadow: var(--shadow-hover);
  transform: translateY(-4px);
}
.feature-item-img {
  width: 88px;
  height: 88px;
  border-radius: var(--radius-img);
  overflow: hidden;
  flex-shrink: 0;
  background: var(--bg-cream);
}
.feature-item-img img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.feature-item h3 {
  font-size: 18px;
  font-weight: 700;
  margin-bottom: 6px;
}
.feature-item p {
  font-size: 14px;
  line-height: 1.7;
  color: var(--text-muted);
}
.feature-wide {
  display: flex;
  gap: 24px;
  align-items: center;
  padding: 28px 32px;
  background: var(--primary);
  color: #fff;
  border-radius: var(--radius-card);
  margin-top: 24px;
  box-shadow: var(--shadow-cta);
}
.feature-wide .wide-icon {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.14);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  color: var(--accent-light);
}
.feature-wide h3 {
  font-size: 18px;
  font-weight: 700;
}
.feature-wide p {
  font-size: 14px;
  color: rgba(255, 255, 255, 0.82);
  margin-top: 4px;
}
.feature-wide .btn {
  margin-left: auto;
  flex-shrink: 0;
}
/* Process */
.process-section {
  background: var(--bg-ink);
  color: #F7F5F2;
  padding: var(--space-section) 0;
}
.process-section .section-head h2 {
  color: #fff;
}
.process-section .section-head .lead {
  color: rgba(247, 245, 242, 0.7);
}
.process-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 32px;
  counter-reset: step;
}
.process-step {
  position: relative;
  padding-top: 24px;
}
.process-step::before {
  content: '';
  position: absolute;
  top: 40px;
  left: 60px;
  right: -40px;
  height: 1px;
  background: rgba(247, 245, 242, 0.12);
}
.process-step:last-child::before {
  display: none;
}
.step-num {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background: var(--accent);
  color: var(--bg-ink);
  font-family: var(--font-num);
  font-weight: 800;
  font-size: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  z-index: 2;
}
.step-title {
  margin-top: 16px;
  font-size: 15px;
  font-weight: 700;
  color: #fff;
}
.step-desc {
  margin-top: 8px;
  font-size: 13px;
  line-height: 1.65;
  color: rgba(247, 245, 242, 0.62);
}
/* Scene */
.scene-wrap {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 56px;
  align-items: center;
}
.scene-media {
  position: relative;
  border-radius: var(--radius-card);
  overflow: hidden;
  box-shadow: var(--shadow-hover);
}
.scene-media img {
  width: 100%;
  height: 420px;
  object-fit: cover;
}
.scene-media::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, transparent 55%, rgba(22, 33, 28, 0.28) 100%);
}
.scene-points {
  display: grid;
  gap: 16px;
}
.scene-point {
  display: flex;
  gap: 16px;
  padding: 22px 24px;
  background: #fff;
  border: 1px solid var(--border);
  border-radius: var(--radius-card);
  transition: all var(--transition);
}
.scene-point:hover {
  box-shadow: var(--shadow-hover);
  transform: translateY(-3px);
}
.scene-point .point-index {
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background: rgba(31, 95, 75, 0.08);
  color: var(--primary);
  font-size: 13px;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  margin-top: 2px;
}
.scene-point h3 {
  font-size: 16px;
  font-weight: 700;
}
.scene-point p {
  font-size: 14px;
  color: var(--text-muted);
  margin-top: 4px;
  line-height: 1.65;
}
/* Stats & testimonials */
.stats-section {
  background: #fff;
}
.stats-row {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 32px;
  text-align: center;
  margin-bottom: 56px;
}
.stat-item {
  padding: 24px 0;
}
.stat-num {
  font-family: var(--font-num);
  font-size: 52px;
  font-weight: 900;
  color: var(--accent);
  line-height: 1.2;
  letter-spacing: -0.02em;
}
.stat-label {
  margin-top: 8px;
  font-size: 13px;
  color: var(--text-muted);
}
.testimonial-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.testimonial-card {
  position: relative;
  background: #F0EFE9;
  border-radius: var(--radius-card);
  padding: 28px 26px 24px;
  border-left: 2px solid var(--accent);
}
.testimonial-card .quote-mark {
  position: absolute;
  top: 18px;
  right: 24px;
  font-size: 48px;
  font-family: Georgia, serif;
  color: rgba(195, 160, 110, 0.3);
  line-height: 1;
}
.testimonial-card p {
  font-size: 14px;
  color: var(--text-main);
  line-height: 1.75;
  position: relative;
  z-index: 1;
}
.testimonial-card .author {
  margin-top: 16px;
  font-size: 13px;
  font-weight: 600;
  color: var(--primary);
}
.testimonial-card .author span {
  display: block;
  font-weight: 400;
  color: var(--text-muted);
  margin-top: 2px;
  font-size: 12px;
}
/* Service cards */
.service-cards {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.service-card {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: var(--radius-card);
  overflow: hidden;
  transition: all var(--transition);
  display: flex;
  flex-direction: column;
}
.service-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-hover);
}
.service-card-img {
  position: relative;
  aspect-ratio: 16 / 10;
  overflow: hidden;
  background: var(--bg-cream);
}
.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-tag {
  position: absolute;
  top: 16px;
  left: 16px;
  height: 24px;
  padding: 0 12px;
  background: rgba(255, 255, 255, 0.92);
  color: var(--primary);
  font-size: 12px;
  font-weight: 600;
  border-radius: 999px;
  display: inline-flex;
  align-items: center;
  backdrop-filter: blur(4px);
}
.service-card-body {
  padding: 24px 24px 20px;
  display: flex;
  flex-direction: column;
  flex: 1;
}
.service-card-body h3 {
  font-size: 19px;
  font-weight: 700;
  line-height: 1.4;
}
.service-card-body p {
  margin-top: 10px;
  font-size: 14px;
  color: var(--text-muted);
  line-height: 1.7;
  flex: 1;
}
.service-card-link {
  margin-top: 16px;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 14px;
  font-weight: 600;
  color: var(--primary);
}
.service-card-link:hover {
  color: var(--primary-dark);
}
.service-card-link .arrow {
  transition: transform var(--transition);
}
.service-card-link:hover .arrow {
  transform: translateX(4px);
}
/* FAQ */
.faq-section {
  background: var(--bg-cream);
}
.faq-list {
  max-width: 820px;
  margin: 0 auto;
}
.faq-item {
  border-bottom: 1px solid var(--divider);
}
.faq-question {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 22px 0;
  cursor: pointer;
  font-size: 16px;
  font-weight: 700;
  color: var(--text-main);
  background: none;
  border: none;
  width: 100%;
  text-align: left;
  font-family: var(--font-sans);
  transition: color var(--transition);
}
.faq-question:hover {
  color: var(--primary);
}
.faq-icon {
  position: relative;
  width: 22px;
  height: 22px;
  flex-shrink: 0;
  transition: transform 0.3s ease;
}
.faq-icon::before,
.faq-icon::after {
  content: '';
  position: absolute;
  background: var(--primary);
  border-radius: 2px;
  transition: all 0.3s ease;
}
.faq-icon::before {
  top: 10px;
  left: 3px;
  width: 16px;
  height: 2px;
}
.faq-icon::after {
  top: 3px;
  left: 10px;
  width: 2px;
  height: 16px;
}
.faq-item.open .faq-icon {
  transform: rotate(45deg);
}
.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.35s ease;
}
.faq-answer-inner {
  padding: 0 0 22px;
  font-size: 14px;
  color: var(--text-muted);
  line-height: 1.75;
  max-width: 640px;
}
/* CTA */
.cta-section {
  background: var(--bg-ink);
  padding: var(--space-section) 0;
  position: relative;
  text-align: center;
}
.cta-section::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse at 50% 100%, rgba(31, 95, 75, 0.35) 0%, transparent 70%);
  pointer-events: none;
}
.cta-inner {
  position: relative;
  max-width: 700px;
  margin: 0 auto;
}
.cta-section h2 {
  font-size: 32px;
  font-weight: 700;
  color: #fff;
  letter-spacing: -0.01em;
}
.cta-section p {
  margin-top: 16px;
  font-size: 16px;
  color: rgba(247, 245, 242, 0.75);
  line-height: 1.8;
}
.cta-actions {
  margin-top: 32px;
  display: flex;
  justify-content: center;
  gap: 14px;
  flex-wrap: wrap;
}
.cta-note {
  margin-top: 20px;
  font-size: 13px;
  color: rgba(247, 245, 242, 0.5);
}
/* Footer */
.site-footer {
  background: var(--bg-ink);
  color: rgba(247, 245, 242, 0.8);
  padding: 64px 0 0;
}
.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1.2fr;
  gap: 40px;
  padding-bottom: 48px;
}
.footer-brand .footer-logo {
  font-size: 20px;
  font-weight: 700;
  color: #fff;
  display: inline-flex;
  align-items: center;
  gap: 10px;
}
.footer-brand p {
  margin-top: 14px;
  font-size: 14px;
  line-height: 1.7;
  color: rgba(247, 245, 242, 0.6);
  max-width: 260px;
}
.footer-col h4 {
  font-size: 14px;
  font-weight: 700;
  color: #fff;
  margin-bottom: 16px;
}
.footer-col a {
  display: block;
  font-size: 14px;
  color: rgba(247, 245, 242, 0.65);
  padding: 4px 0;
  transition: color var(--transition);
}
.footer-col a:hover {
  color: var(--accent);
}
.footer-col p {
  font-size: 14px;
  color: rgba(247, 245, 242, 0.65);
  padding: 4px 0;
}
.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  padding: 20px 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 13px;
  color: rgba(247, 245, 242, 0.45);
}
.footer-bottom a {
  color: rgba(247, 245, 242, 0.45);
  margin-left: 20px;
}
.footer-bottom a:hover {
  color: var(--accent);
}
/* Reveal */
.reveal {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.5s ease, transform 0.5s ease;
}
.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}
/* Responsive */
@media (max-width: 1024px) {
  .header-inner {
    padding: 0 20px;
  }
  .main-nav {
    margin-left: 16px;
  }
  .feature-split {
    gap: 40px;
  }
  .feature-wide {
    flex-wrap: wrap;
  }
  .feature-wide .btn {
    margin-left: 0;
  }
  .process-grid {
    gap: 20px;
  }
  .process-step::before {
    right: -20px;
  }
  .service-cards {
    gap: 16px;
  }
}
@media (max-width: 900px) {
  .main-nav {
    display: none;
    position: absolute;
    top: 72px;
    left: 20px;
    right: 20px;
    background: #fff;
    border-radius: var(--radius-card);
    box-shadow: var(--shadow-hover);
    flex-direction: column;
    align-items: stretch;
    gap: 4px;
    padding: 12px;
    z-index: 99;
    border: 1px solid var(--border);
  }
  .main-nav.open {
    display: flex;
  }
  .main-nav .nav-tab {
    border-radius: 6px;
    padding: 12px 16px;
  }
  .mobile-toggle {
    display: inline-flex;
  }
  .header-cta {
    display: none;
  }
  .header-inner {
    height: 64px;
  }
  .main-nav {
    top: 64px;
  }
}
@media (max-width: 768px) {
  .section {
    padding: var(--space-section-mobile) 0;
  }
  .page-hero {
    padding: 140px 0 56px;
    min-height: 280px;
  }
  .page-hero h1 {
    font-size: 34px;
  }
  .page-hero .hero-sub {
    font-size: 15px;
  }
  .hero-trust {
    gap: 16px;
    margin-top: 28px;
  }
  .feature-split {
    grid-template-columns: 1fr;
    gap: 32px;
  }
  .feature-stack {
    grid-template-columns: 1fr;
  }
  .feature-item {
    padding: 20px;
  }
  .feature-wide {
    padding: 24px;
    flex-direction: column;
    align-items: flex-start;
  }
  .process-grid {
    grid-template-columns: 1fr 1fr;
    gap: 28px 20px;
  }
  .process-step::before {
    display: none;
  }
  .scene-wrap {
    grid-template-columns: 1fr;
    gap: 32px;
  }
  .scene-media img {
    height: 280px;
  }
  .stats-row {
    grid-template-columns: 1fr 1fr;
    gap: 24px;
    margin-bottom: 40px;
  }
  .stat-num {
    font-size: 40px;
  }
  .testimonial-grid {
    grid-template-columns: 1fr;
  }
  .service-cards {
    grid-template-columns: 1fr;
  }
  .section-head h2 {
    font-size: 26px;
  }
  .cta-section h2 {
    font-size: 26px;
  }
  .cta-actions .btn {
    width: 100%;
    max-width: 320px;
  }
  .footer-grid {
    grid-template-columns: 1fr 1fr;
    gap: 32px;
  }
  .footer-brand {
    grid-column: 1 / -1;
  }
}
@media (max-width: 520px) {
  .container {
    padding: 0 16px;
  }
  .hero-actions {
    flex-direction: column;
    width: 100%;
  }
  .hero-actions .btn {
    width: 100%;
  }
  .process-grid {
    grid-template-columns: 1fr;
  }
  .stats-row {
    grid-template-columns: 1fr 1fr;
  }
  .footer-grid {
    grid-template-columns: 1fr;
  }
  .footer-bottom {
    flex-direction: column;
    gap: 12px;
    align-items: flex-start;
  }
  .footer-bottom a {
    margin-left: 0;
    margin-right: 16px;
  }
}

/* roulang page: article */
:root {
  --primary: #1F5F4B;
  --primary-hover: #174737;
  --primary-active: #123A2D;
  --accent: #C3A06E;
  --accent-hover: #B5905A;
  --bg: #F7F5F2;
  --dark: #16211C;
  --text: #1D2221;
  --text-light: #6C7470;
  --border: rgba(31,95,75,0.12);
  --border-light: rgba(0,0,0,0.08);
  --radius-btn: 6px;
  --radius-card: 8px;
  --radius-img: 4px;
  --shadow-card: 0 2px 8px rgba(27,38,33,0.04);
  --shadow-hover: 0 8px 24px rgba(27,38,33,0.08);
  --font-cn: "PingFang SC", "Microsoft YaHei", "Source Han Sans SC", sans-serif;
  --font-en: "Inter", "Roboto", sans-serif;
  --transition: 0.25s ease-out;
}
*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { font-family: var(--font-cn); background: var(--bg); color: var(--text); line-height: 1.6; -webkit-font-smoothing: antialiased; }
a { text-decoration: none; color: inherit; }
img { max-width: 100%; display: block; }
ul, ol { list-style: none; }
button { outline: none; border: none; background: none; cursor: pointer; }

.container { max-width: 1200px; margin: 0 auto; padding: 0 24px; }
.container-narrow { max-width: 720px; margin: 0 auto; }

.btn { display: inline-flex; align-items: center; justify-content: center; height: 44px; padding: 0 28px; border-radius: var(--radius-btn); font-size: 15px; font-weight: 600; font-family: var(--font-cn); transition: all var(--transition); cursor: pointer; border: 1px solid transparent; white-space: nowrap; }
.btn-primary { background: var(--primary); color: #fff; }
.btn-primary:hover { background: var(--primary-hover); transform: translateY(-1px); box-shadow: 0 6px 16px rgba(31,95,75,0.18); }
.btn-primary:active { background: var(--primary-active); transform: translateY(0); }
.btn-ghost { background: transparent; color: var(--primary); border-color: var(--primary); }
.btn-ghost:hover { background: rgba(31,95,75,0.06); border-color: var(--primary-hover); }
.btn-gold { background: var(--accent); color: #16211C; }
.btn-gold:hover { background: var(--accent-hover); transform: translateY(-1px); box-shadow: 0 6px 20px rgba(195,160,110,0.3); }
.btn-ghost-light { background: transparent; color: #fff; border-color: rgba(255,255,255,0.6); }
.btn-ghost-light:hover { background: rgba(255,255,255,0.1); border-color: #fff; }

.site-header { position: fixed; top: 0; left: 0; width: 100%; z-index: 1000; transition: background 0.35s ease, box-shadow 0.35s ease, backdrop-filter 0.35s ease; background: transparent; }
.site-header.scrolled { background: rgba(247,245,242,0.92); backdrop-filter: blur(16px); -webkit-backdrop-filter: blur(16px); box-shadow: 0 1px 0 rgba(0,0,0,0.06); }
.header-inner { display: flex; align-items: center; justify-content: space-between; height: 76px; }
.site-logo { display: flex; align-items: center; gap: 10px; }
.logo-mark { width: 34px; height: 34px; flex-shrink: 0; }
.logo-text { font-size: 20px; font-weight: 800; letter-spacing: -0.01em; color: var(--dark); }
.main-nav { display: flex; align-items: center; gap: 8px; margin-left: 48px; }
.nav-tab { display: inline-flex; align-items: center; height: 36px; padding: 0 18px; border-radius: 999px; font-size: 14px; font-weight: 500; color: var(--text); border: 1px solid rgba(31,95,75,0.18); transition: all var(--transition); }
.nav-tab:hover { background: rgba(31,95,75,0.06); color: var(--primary); }
.nav-tab.active { background: var(--primary); color: #fff; border-color: var(--primary); }
.header-cta { height: 38px; padding: 0 22px; font-size: 14px; margin-left: 8px; }
.nav-toggle { display: none; flex-direction: column; gap: 5px; width: 40px; height: 40px; align-items: center; justify-content: center; border-radius: var(--radius-btn); }
.nav-toggle .bar { width: 20px; height: 2px; background: var(--dark); border-radius: 2px; transition: all 0.3s ease; }
.nav-toggle.active .bar:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-toggle.active .bar:nth-child(2) { opacity: 0; }
.nav-toggle.active .bar:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }
.mobile-menu { display: none; }

.article-hero { position: relative; padding: 140px 0 56px; background: linear-gradient(to right, rgba(247,245,242,0.97), rgba(247,245,242,0.82)), url('/assets/images/backpic/back-1.png') center/cover no-repeat; border-bottom: 1px solid var(--border); }
.article-hero-content { position: relative; z-index: 2; max-width: 860px; margin: 0 auto; }
.breadcrumb { display: flex; align-items: center; gap: 10px; font-size: 13px; color: var(--text-light); margin-bottom: 24px; flex-wrap: wrap; }
.breadcrumb a { color: var(--text-light); transition: color 0.2s; }
.breadcrumb a:hover { color: var(--primary); }
.breadcrumb i { font-size: 11px; color: rgba(0,0,0,0.3); }
.breadcrumb span { max-width: 260px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; color: var(--text); font-weight: 500; }
.article-title { font-size: 40px; line-height: 1.3; font-weight: 800; letter-spacing: -0.01em; color: var(--dark); margin-bottom: 20px; }
.article-meta { display: flex; align-items: center; gap: 20px; flex-wrap: wrap; font-size: 13px; color: var(--text-light); }
.meta-item { display: inline-flex; align-items: center; gap: 6px; }
.meta-item i { color: var(--accent); }
.tag-item { background: rgba(31,95,75,0.06); border-radius: 999px; padding: 2px 12px; color: var(--primary); font-size: 12px; }

.article-section { padding: 64px 0 40px; }
.article-content { font-size: 16px; line-height: 1.75; color: var(--text); }
.article-content > *:first-child { margin-top: 0; }
.article-content h2 { font-size: 24px; font-weight: 700; margin: 36px 0 16px; padding-bottom: 10px; position: relative; color: var(--dark); }
.article-content h2::after { content: ''; position: absolute; bottom: 0; left: 0; width: 42px; height: 3px; border-radius: 2px; background: var(--accent); }
.article-content h3 { font-size: 20px; font-weight: 700; margin: 28px 0 12px; color: var(--dark); }
.article-content h4 { font-size: 17px; font-weight: 600; margin: 20px 0 10px; color: var(--dark); }
.article-content p { margin-bottom: 18px; }
.article-content ul, .article-content ol { margin: 18px 0; padding-left: 24px; }
.article-content ul li { position: relative; margin-bottom: 8px; padding-left: 4px; }
.article-content ul li::before { content: ''; position: absolute; left: -18px; top: 11px; width: 6px; height: 6px; border-radius: 50%; background: var(--primary); }
.article-content ol { list-style: decimal; }
.article-content ol li { margin-bottom: 8px; padding-left: 4px; }
.article-content blockquote { border-left: 4px solid var(--accent); background: #F0EFE9; padding: 18px 24px; margin: 26px 0; border-radius: 0 8px 8px 0; color: var(--text); font-style: normal; }
.article-content blockquote p { margin-bottom: 0; }
.article-content img { max-width: 100%; border-radius: 8px; margin: 26px auto; box-shadow: var(--shadow-card); }
.article-content a { color: var(--primary); text-decoration: underline; text-underline-offset: 3px; transition: color 0.2s; }
.article-content a:hover { color: var(--primary-hover); }
.article-content code { background: rgba(31,95,75,0.08); padding: 2px 6px; border-radius: 4px; font-size: 14px; font-family: 'Inter', monospace; }
.article-content hr { border: none; border-top: 1px solid rgba(0,0,0,0.1); margin: 32px 0; }

.article-empty { text-align: center; padding: 80px 24px; background: #fff; border-radius: 12px; border: 1px dashed var(--border); }
.article-empty i { font-size: 48px; color: var(--text-light); margin-bottom: 16px; }
.article-empty p { font-size: 16px; color: var(--text-light); margin-bottom: 20px; }

.related-section { padding: 56px 0 64px; background: #F0EFE9; }
.section-head { display: flex; align-items: flex-end; justify-content: space-between; margin-bottom: 28px; }
.section-head h2 { font-size: 28px; font-weight: 700; color: var(--dark); }
.section-link { font-size: 14px; color: var(--primary); font-weight: 500; display: inline-flex; align-items: center; gap: 6px; transition: color 0.2s; }
.section-link:hover { color: var(--primary-hover); }
.related-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.related-card { background: #fff; border-radius: 10px; overflow: hidden; box-shadow: var(--shadow-card); border: 1px solid rgba(0,0,0,0.04); transition: all 0.3s ease; display: block; }
.related-card:hover { box-shadow: var(--shadow-hover); transform: translateY(-4px); }
.related-thumb { aspect-ratio: 16/9; overflow: hidden; }
.related-thumb img { width: 100%; height: 100%; object-fit: cover; transition: transform 0.4s ease; }
.related-card:hover .related-thumb img { transform: scale(1.04); }
.related-info { padding: 16px 18px; }
.related-info h3 { font-size: 16px; font-weight: 600; line-height: 1.5; color: var(--dark); margin-bottom: 8px; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; transition: color 0.2s; }
.related-card:hover .related-info h3 { color: var(--primary); }
.related-date { font-size: 12px; color: var(--text-light); }

.article-backbar { padding: 36px 24px 24px; max-width: 1200px; }
.back-link { display: inline-flex; align-items: center; gap: 8px; color: var(--primary); font-weight: 500; font-size: 15px; transition: gap 0.2s; }
.back-link:hover { gap: 12px; color: var(--primary-hover); }
.back-link i { font-size: 14px; }

.cta-section { padding: 80px 0; background: var(--dark); color: #F7F5F2; }
.cta-box { max-width: 720px; margin: 0 auto; text-align: center; }
.cta-box h2 { font-size: 32px; font-weight: 800; margin-bottom: 16px; }
.cta-box p { font-size: 16px; line-height: 1.8; color: rgba(247,245,242,0.8); margin-bottom: 32px; }
.cta-actions { display: flex; gap: 16px; justify-content: center; flex-wrap: wrap; }

.site-footer { background: var(--dark); padding: 64px 0 24px; color: rgba(247,245,242,0.8); }
.footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr 1.2fr; gap: 40px; padding-bottom: 48px; border-bottom: 1px solid rgba(255,255,255,0.1); }
.footer-logo { display: flex; align-items: center; gap: 8px; font-size: 20px; font-weight: 800; color: #F7F5F2; margin-bottom: 16px; }
.footer-brand p { font-size: 13px; line-height: 1.8; color: rgba(247,245,242,0.6); max-width: 260px; }
.footer-col h4 { font-size: 15px; font-weight: 600; color: #F7F5F2; margin-bottom: 16px; }
.footer-col a { display: block; font-size: 13px; color: rgba(247,245,242,0.65); line-height: 2.2; transition: color 0.2s; }
.footer-col a:hover { color: var(--accent); }
.footer-col p { font-size: 13px; line-height: 2.2; color: rgba(247,245,242,0.65); }
.footer-bottom { display: flex; align-items: center; justify-content: space-between; padding-top: 20px; font-size: 13px; color: rgba(247,245,242,0.5); }
.footer-bottom a { color: rgba(247,245,242,0.5); margin-left: 20px; transition: color 0.2s; }
.footer-bottom a:hover { color: var(--accent); }

.sticky-bar { position: fixed; bottom: 0; left: 0; width: 100%; background: rgba(255,255,255,0.96); backdrop-filter: blur(12px); -webkit-backdrop-filter: blur(12px); height: 64px; box-shadow: 0 -1px 0 rgba(0,0,0,0.06), 0 -8px 32px rgba(27,38,33,0.06); display: none; align-items: center; justify-content: space-between; padding: 0 24px; z-index: 900; }
.sticky-bar.show { display: flex; }
.sticky-bar-info { display: flex; align-items: baseline; gap: 12px; }
.sticky-bar-info strong { font-size: 15px; color: var(--dark); }
.sticky-bar-info span { font-size: 12px; color: var(--text-light); }
.sticky-btn { height: 38px; padding: 0 20px; font-size: 14px; }

.reveal { opacity: 0; transform: translateY(20px); transition: opacity 0.5s ease, transform 0.5s ease; }
.reveal.visible { opacity: 1; transform: translateY(0); }

@media (max-width: 1024px) {
  .footer-grid { grid-template-columns: 1fr 1fr; gap: 32px; }
  .related-grid { grid-template-columns: repeat(2, 1fr); }
  .article-title { font-size: 34px; }
  .main-nav { margin-left: 24px; }
}

@media (max-width: 690px) {
  .header-inner { height: 64px; }
  .main-nav, .header-cta { display: none; }
  .nav-toggle { display: flex; }
  .mobile-menu { display: block; position: fixed; top: 64px; left: 0; width: 100%; background: #fff; box-shadow: 0 12px 32px rgba(0,0,0,0.08); padding: 16px 24px; transform: translateY(-120%); transition: transform 0.35s ease; z-index: 999; border-bottom: 1px solid var(--border); }
  .mobile-menu.open { transform: translateY(0); }
  .mobile-menu a { display: block; padding: 12px 0; font-size: 15px; font-weight: 500; color: var(--text); border-bottom: 1px solid rgba(0,0,0,0.04); }
  .mobile-menu a:last-child { border-bottom: none; }
  .mobile-menu a.active { color: var(--primary); }
  .mobile-menu .mobile-cta { margin-top: 16px; text-align: center; border-radius: 8px; }
  .article-hero { padding: 110px 0 40px; }
  .article-hero-content { max-width: 100%; }
  .article-title { font-size: 26px; }
  .article-meta { gap: 12px; font-size: 12px; }
  .article-section { padding: 40px 0 32px; }
  .container-narrow { padding: 0 18px; }
  .article-content { font-size: 15px; }
  .article-content h2 { font-size: 20px; margin: 26px 0 12px; }
  .article-content h3 { font-size: 18px; }
  .related-grid { grid-template-columns: 1fr; }
  .section-head { flex-direction: column; align-items: flex-start; gap: 12px; }
  .cta-section { padding: 56px 0; }
  .cta-box h2 { font-size: 26px; }
  .footer-grid { grid-template-columns: 1fr; gap: 28px; }
  .footer-bottom { flex-direction: column; gap: 12px; align-items: flex-start; }
  .footer-bottom a { margin-left: 0; margin-right: 20px; }
  .sticky-bar { height: 60px; padding: 0 16px; padding-bottom: env(safe-area-inset-bottom); }
  .sticky-bar-info span { display: none; }
  .sticky-btn { width: 120px; padding: 0 12px; }
}