/* roulang page: index */
:root {
  --primary: #2D6CDF;
  --primary-dark: #1E56C4;
  --secondary: #0D9488;
  --secondary-dark: #0F766E;
  --success: #059669;
  --warning: #D97706;
  --danger: #DC2626;
  --bg: #F8FAFC;
  --card-bg: #FFFFFF;
  --text: #0F172A;
  --text-secondary: #475569;
  --text-muted: #94A3B8;
  --border: #E2E8F0;
  --radius-sm: 0.375rem;
  --radius-md: 0.5rem;
  --radius-lg: 0.75rem;
  --radius-xl: 1rem;
  --shadow-sm: 0 1px 3px rgba(15,23,42,0.06), 0 4px 12px rgba(15,23,42,0.04);
  --shadow-md: 0 4px 8px rgba(15,23,42,0.08), 0 12px 24px rgba(15,23,42,0.08);
  --shadow-lg: 0 20px 40px rgba(15,23,42,0.15);
  --font-family: system-ui, -apple-system, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
}

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

html {
  scroll-behavior: smooth;
}

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

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

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

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

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding-left: 1.5rem;
  padding-right: 1.5rem;
}

@media (max-width: 640px) {
  .container {
    padding-left: 1rem;
    padding-right: 1rem;
  }
}

section {
  scroll-margin-top: 80px;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background-color: rgba(255,255,255,0.95);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--border);
  transition: box-shadow 0.2s ease;
}

.site-header.scrolled {
  box-shadow: 0 4px 20px rgba(15,23,42,0.05);
}

.header-inner {
  display: flex;
  align-items: center;
  gap: 1rem;
  height: 64px;
}

.logo {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 1.1rem;
  font-weight: 800;
  color: var(--text);
  white-space: nowrap;
  letter-spacing: -0.01em;
}

.logo-icon {
  width: 34px;
  height: 34px;
  flex-shrink: 0;
}

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

.search-wrap {
  flex: 1;
  max-width: 460px;
  margin: 0 auto;
}

.search-form {
  display: flex;
  align-items: center;
  background-color: #F1F5F9;
  border-radius: 9999px;
  height: 40px;
  padding: 0 0.875rem;
  border: 1px solid transparent;
  transition: border-color 0.15s ease, box-shadow 0.15s ease, background-color 0.15s ease;
}

.search-form:focus-within {
  background-color: #fff;
  border-color: var(--primary);
  box-shadow: 0 0 0 4px rgba(45,108,223,0.15);
}

.search-icon {
  width: 17px;
  height: 17px;
  color: var(--text-muted);
  flex-shrink: 0;
  margin-right: 0.5rem;
}

.search-form input {
  background: transparent;
  border: none;
  outline: none;
  width: 100%;
  font-size: 0.9375rem;
  color: var(--text);
}

.search-form input::placeholder {
  color: var(--text-muted);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 1.5rem;
  font-size: 0.9375rem;
  font-weight: 500;
  color: var(--text-secondary);
  white-space: nowrap;
}

.nav-item {
  position: relative;
  padding-bottom: 2px;
  transition: color 0.15s ease;
}

.nav-item::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: -2px;
  height: 2px;
  border-radius: 2px;
  background-color: var(--primary);
  transform: scaleX(0);
  transition: transform 0.2s ease;
}

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

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

.nav-item.active {
  color: var(--primary);
}

.nav-item.active::after {
  transform: scaleX(1);
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border: none;
  cursor: pointer;
  font-weight: 600;
  border-radius: var(--radius-md);
  transition: background-color 0.15s ease, transform 0.15s ease, box-shadow 0.15s ease, opacity 0.15s ease;
  font-size: 0.9375rem;
  padding: 0.625rem 1.25rem;
  line-height: 1.2;
}

.btn:focus-visible {
  outline: 3px solid rgba(45,108,223,0.4);
  outline-offset: 2px;
}

.btn-primary {
  background-color: var(--primary);
  color: #fff;
}

.btn-primary:hover {
  background-color: var(--primary-dark);
  box-shadow: 0 4px 12px rgba(45,108,223,0.25);
}

.btn-primary:active {
  transform: scale(0.98);
}

.btn-outline {
  background-color: transparent;
  color: var(--primary);
  border: 1px solid var(--primary);
}

.btn-outline:hover {
  background-color: rgba(45,108,223,0.06);
  border-color: var(--primary-dark);
  color: var(--primary-dark);
}

.btn-outline:active {
  transform: scale(0.98);
}

.btn-sm {
  padding: 0.5rem 1rem;
  font-size: 0.875rem;
  border-radius: 9999px;
}

.btn-lg {
  padding: 0.75rem 1.75rem;
  font-size: 1rem;
  border-radius: var(--radius-lg);
}

.btn-block {
  width: 100%;
}

.btn[disabled] {
  background-color: #CBD5E1;
  cursor: not-allowed;
  opacity: 0.7;
}

.btn.success-state {
  background-color: var(--success);
}

.icon-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: 9999px;
  border: none;
  background-color: transparent;
  color: var(--text-secondary);
  cursor: pointer;
  transition: background-color 0.15s ease, color 0.15s ease;
}

.icon-btn:hover {
  background-color: #F1F5F9;
  color: var(--primary);
}

.icon-btn svg {
  width: 20px;
  height: 20px;
}

.mobile-search-row {
  display: none;
  padding: 0.5rem 1rem 0.75rem;
  border-top: 1px solid var(--border);
  background-color: #fff;
}

.mobile-search-row .search-form {
  background-color: #F1F5F9;
}

.mobile-menu {
  display: none;
  padding: 0.75rem 1rem 1rem;
  border-top: 1px solid var(--border);
  background-color: #fff;
  flex-direction: column;
  gap: 0.5rem;
}

.mobile-menu .nav-item {
  display: block;
  padding: 0.625rem 0.75rem;
  border-radius: var(--radius-md);
  font-size: 0.9375rem;
}

.mobile-menu .nav-item.active {
  background-color: rgba(45,108,223,0.08);
  color: var(--primary);
}

.mobile-menu.open {
  display: flex;
  animation: fadeSlideIn 0.2s ease;
}

.mobile-search-row.open {
  display: block;
  animation: fadeSlideIn 0.2s ease;
}

@keyframes fadeSlideIn {
  from {
    opacity: 0;
    transform: translateY(-6px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* Hero */
.hero {
  background-color: var(--bg);
  position: relative;
  overflow: hidden;
  padding: 4.5rem 0 4rem;
}

.hero::before {
  content: "";
  position: absolute;
  top: 0;
  right: 0;
  width: 480px;
  height: 480px;
  background-image: radial-gradient(circle at 70% 30%, rgba(45,108,223,0.07) 0, transparent 60%);
  pointer-events: none;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 3rem;
  align-items: center;
  position: relative;
  z-index: 1;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  background-color: rgba(45,108,223,0.08);
  color: var(--primary-dark);
  border-radius: 9999px;
  padding: 0.375rem 0.875rem;
  font-size: 0.8125rem;
  font-weight: 600;
  margin-bottom: 1.25rem;
}

.hero-badge svg {
  width: 15px;
  height: 15px;
}

.hero h1 {
  font-size: clamp(2rem, 4vw, 3.25rem);
  font-weight: 800;
  line-height: 1.18;
  letter-spacing: -0.02em;
  color: var(--text);
  margin-bottom: 1.25rem;
}

.hero h1 .highlight {
  color: var(--primary);
}

.hero-sub {
  font-size: 1.0625rem;
  line-height: 1.75;
  color: var(--text-secondary);
  max-width: 560px;
  margin-bottom: 1.5rem;
}

.pain-pills {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-bottom: 1.75rem;
}

.pain-pill {
  display: inline-flex;
  align-items: center;
  gap: 0.375rem;
  background-color: #FFF7ED;
  color: #9A3412;
  border-radius: var(--radius-sm);
  padding: 0.25rem 0.625rem;
  font-size: 0.8125rem;
  font-weight: 400;
  border: 1px solid #FFEDD5;
}

.pain-pill svg {
  width: 13px;
  height: 13px;
  color: #F97316;
}

.hero-cta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-bottom: 1rem;
}

.hero-note {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.8125rem;
  color: var(--text-muted);
}

.hero-note svg {
  width: 14px;
  height: 14px;
  color: var(--success);
}

.hero-visual {
  display: flex;
  justify-content: center;
  align-items: center;
}

.hero-image-wrap {
  background-color: rgba(45,108,223,0.04);
  border-radius: var(--radius-xl);
  padding: 1rem;
  border: 1px solid rgba(45,108,223,0.1);
  box-shadow: var(--shadow-sm);
  max-width: 480px;
}

.hero-image-wrap img {
  width: 100%;
  height: auto;
  border-radius: var(--radius-lg);
  object-fit: cover;
  aspect-ratio: 4 / 3;
}

/* Section common */
.section {
  padding: 4rem 0;
}

.section-alt {
  background-color: #fff;
}

.section-header {
  text-align: center;
  max-width: 700px;
  margin: 0 auto 3rem;
}

.section-header .section-eyebrow {
  display: inline-block;
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--primary);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  background-color: rgba(45,108,223,0.08);
  padding: 0.25rem 0.75rem;
  border-radius: 9999px;
  margin-bottom: 0.75rem;
}

.section-header h2 {
  font-size: clamp(1.5rem, 2.5vw, 2.25rem);
  font-weight: 700;
  letter-spacing: -0.01em;
  line-height: 1.3;
  margin-bottom: 0.875rem;
  color: var(--text);
}

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

.grid-3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
}

.grid-4 {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1.5rem;
}

@media (max-width: 1023px) {
  .grid-3 {
    grid-template-columns: repeat(2, 1fr);
  }
  .grid-4 {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 640px) {
  .grid-3, .grid-4 {
    grid-template-columns: 1fr;
  }
}

/* Cards */
.card {
  background-color: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 1.5rem;
  box-shadow: var(--shadow-sm);
  transition: box-shadow 0.15s ease, transform 0.15s ease, border-color 0.15s ease;
  display: flex;
  flex-direction: column;
  height: 100%;
}

.card:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
  border-color: rgba(45,108,223,0.25);
}

.card-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  border-radius: 9999px;
  background-color: rgba(45,108,223,0.1);
  color: var(--primary);
  margin-bottom: 1rem;
  flex-shrink: 0;
}

.card-icon svg {
  width: 22px;
  height: 22px;
}

.card h3 {
  font-size: 1.125rem;
  font-weight: 600;
  margin-bottom: 0.625rem;
  color: var(--text);
}

.card p {
  color: var(--text-secondary);
  font-size: 0.9375rem;
  line-height: 1.7;
  flex-grow: 1;
  margin-bottom: 1rem;
}

.card-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-bottom: 1rem;
}

.tag {
  background-color: rgba(13,148,136,0.08);
  color: var(--secondary-dark);
  font-size: 0.75rem;
  font-weight: 500;
  padding: 0.1875rem 0.5rem;
  border-radius: var(--radius-sm);
  display: inline-block;
}

.card-link {
  display: inline-flex;
  align-items: center;
  gap: 0.25rem;
  color: var(--primary);
  font-weight: 500;
  font-size: 0.875rem;
  margin-top: auto;
  transition: gap 0.15s ease, color 0.15s ease;
}

.card-link:hover {
  gap: 0.5rem;
  color: var(--primary-dark);
}

.card-link svg {
  width: 16px;
  height: 16px;
}

/* Stats */
.stats-section {
  background: linear-gradient(180deg, rgba(45,108,223,0.03), rgba(45,108,223,0.01));
  padding: 3.5rem 0;
}

.stats-card {
  background-color: rgba(255,255,255,0.9);
  border: 1px solid var(--border);
  border-radius: var(--radius-xl);
  padding: 2.5rem 2rem;
  box-shadow: var(--shadow-sm);
  text-align: center;
}

.stats-number {
  font-size: clamp(2rem, 3vw, 2.75rem);
  font-weight: 800;
  color: var(--primary);
  line-height: 1.2;
  letter-spacing: -0.02em;
}

.stats-number .suffix {
  color: var(--secondary);
  font-weight: 700;
  font-size: 0.7em;
  margin-left: 0.125rem;
}

.stats-label {
  margin-top: 0.5rem;
  font-size: 0.875rem;
  color: var(--text-secondary);
}

/* Features */
.feature-list {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1.5rem;
}

@media (max-width: 1023px) {
  .feature-list {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 640px) {
  .feature-list {
    grid-template-columns: 1fr;
  }
}

.feature-item {
  padding: 1.75rem;
  background-color: #fff;
  border-radius: var(--radius-lg);
  border: 1px solid var(--border);
  transition: box-shadow 0.15s ease, transform 0.15s ease;
}

.feature-item:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}

.feature-icon {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-md);
  background-color: rgba(45,108,223,0.1);
  color: var(--primary);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 1rem;
}

.feature-icon svg {
  width: 22px;
  height: 22px;
}

.feature-item h3 {
  font-size: 1.125rem;
  font-weight: 600;
  margin-bottom: 0.5rem;
  color: var(--text);
}

.feature-item p {
  font-size: 0.875rem;
  color: var(--text-secondary);
  line-height: 1.65;
}

/* News */
.news-section {
  background-color: var(--bg);
}

.news-grid-main {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 1.5rem;
  margin-bottom: 1.5rem;
}

@media (max-width: 768px) {
  .news-grid-main {
    grid-template-columns: 1fr;
  }
}

.featured-card {
  background-color: #fff;
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  box-shadow: var(--shadow-sm);
  transition: box-shadow 0.15s ease, transform 0.15s ease;
}

.featured-card:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}

.featured-card img {
  width: 100%;
  height: 220px;
  object-fit: cover;
}

.featured-body {
  padding: 1.5rem;
  flex-grow: 1;
  display: flex;
  flex-direction: column;
}

.featured-body h3 {
  font-size: 1.375rem;
  font-weight: 700;
  margin: 0.5rem 0;
  line-height: 1.4;
  color: var(--text);
}

.featured-body h3 a:hover {
  color: var(--primary);
}

.featured-body p {
  color: var(--text-secondary);
  font-size: 0.9375rem;
  line-height: 1.7;
  flex-grow: 1;
}

.news-time {
  display: inline-flex;
  align-items: center;
  gap: 0.375rem;
  font-size: 0.8125rem;
  color: var(--text-muted);
  margin-top: 0.75rem;
}

.news-time svg {
  width: 14px;
  height: 14px;
}

.badge {
  display: inline-block;
  background-color: rgba(45,108,223,0.1);
  color: var(--primary-dark);
  font-size: 0.75rem;
  font-weight: 600;
  padding: 0.25rem 0.625rem;
  border-radius: 9999px;
}

.news-list {
  background-color: #fff;
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 0.25rem 1.5rem;
  display: flex;
  flex-direction: column;
  justify-content: center;
  box-shadow: var(--shadow-sm);
}

.news-list-item {
  display: flex;
  flex-direction: column;
  padding: 1rem 0;
  border-bottom: 1px solid #F1F5F9;
  transition: padding-left 0.15s ease, background-color 0.15s ease;
}

.news-list-item:last-child {
  border-bottom: none;
}

.news-list-item:hover {
  padding-left: 0.5rem;
  background-color: rgba(45,108,223,0.02);
}

.news-list-item h4 {
  font-size: 0.9375rem;
  font-weight: 600;
  color: var(--text);
  line-height: 1.4;
  margin: 0.375rem 0;
}

.news-list-item h4 a:hover {
  color: var(--primary);
}

.news-list-item .news-time {
  margin-top: 0.25rem;
}

.news-cards {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
}

@media (max-width: 1023px) {
  .news-cards {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 640px) {
  .news-cards {
    grid-template-columns: 1fr;
  }
}

.news-card {
  background-color: #fff;
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  box-shadow: var(--shadow-sm);
  transition: box-shadow 0.15s ease, transform 0.15s ease;
}

.news-card:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}

.news-card img {
  width: 100%;
  height: 150px;
  object-fit: cover;
}

.news-card-body {
  padding: 1.25rem;
  display: flex;
  flex-direction: column;
  flex-grow: 1;
}

.news-card-body h4 {
  font-size: 1rem;
  font-weight: 600;
  line-height: 1.45;
  margin: 0.5rem 0;
  color: var(--text);
}

.news-card-body h4 a:hover {
  color: var(--primary);
}

.news-card-body p {
  font-size: 0.875rem;
  color: var(--text-secondary);
  line-height: 1.6;
  flex-grow: 1;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

/* Empty state */
.empty-state {
  border: 2px dashed var(--border);
  border-radius: var(--radius-lg);
  background-color: rgba(255,255,255,0.6);
  padding: 3rem 2rem;
  text-align: center;
  color: var(--text-muted);
}

.empty-state svg {
  width: 40px;
  height: 40px;
  margin: 0 auto 1rem;
  color: var(--text-muted);
  opacity: 0.5;
}

.empty-state p {
  font-size: 0.9375rem;
}

/* Process */
.process-section {
  background-color: #fff;
}

.process-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1.5rem;
  counter-reset: step;
}

@media (max-width: 1023px) {
  .process-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 640px) {
  .process-grid {
    grid-template-columns: 1fr;
  }
}

.process-step {
  position: relative;
  background-color: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 1.75rem;
  transition: box-shadow 0.15s ease, transform 0.15s ease;
}

.process-step:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}

.process-step .step-num {
  font-size: 0.8125rem;
  font-weight: 700;
  color: var(--primary);
  background-color: rgba(45,108,223,0.1);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  border-radius: 9999px;
  margin-bottom: 1rem;
}

.process-step h3 {
  font-size: 1.0625rem;
  font-weight: 600;
  margin-bottom: 0.5rem;
  color: var(--text);
}

.process-step p {
  font-size: 0.875rem;
  color: var(--text-secondary);
  line-height: 1.65;
}

/* FAQ */
.faq-section {
  background-color: var(--bg);
}

.faq-list {
  max-width: 780px;
  margin: 0 auto;
}

.faq-item {
  background-color: #fff;
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  margin-bottom: 0.875rem;
  overflow: hidden;
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.faq-item.active {
  border-color: rgba(45,108,223,0.4);
  box-shadow: 0 0 0 3px rgba(45,108,223,0.07);
}

.faq-question {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  width: 100%;
  padding: 1.125rem 1.375rem;
  background-color: transparent;
  border: none;
  cursor: pointer;
  text-align: left;
  font-size: 1rem;
  font-weight: 600;
  color: var(--text);
  transition: color 0.15s ease;
}

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

.faq-icon {
  width: 28px;
  height: 28px;
  border-radius: 9999px;
  background-color: rgba(45,108,223,0.08);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  transition: transform 0.25s ease, background-color 0.25s ease;
}

.faq-icon svg {
  width: 15px;
  height: 15px;
  color: var(--primary);
}

.faq-item.active .faq-icon {
  transform: rotate(45deg);
  background-color: var(--primary);
}

.faq-item.active .faq-icon svg {
  color: #fff;
}

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

.faq-answer-inner {
  padding: 0 1.375rem 1.25rem;
  font-size: 0.9375rem;
  color: var(--text-secondary);
  line-height: 1.75;
}

/* CTA */
.cta-banner {
  background: linear-gradient(135deg, rgba(45,108,223,0.06), rgba(45,108,223,0.02));
  border: 1px solid rgba(45,108,223,0.15);
  border-radius: var(--radius-xl);
  padding: 2.75rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 2rem;
  flex-wrap: wrap;
}

.cta-banner h2 {
  font-size: clamp(1.25rem, 2vw, 1.75rem);
  font-weight: 700;
  margin-bottom: 0.5rem;
  color: var(--text);
}

.cta-banner p {
  color: var(--text-secondary);
  font-size: 0.9375rem;
}

/* Privacy note */
.privacy-note {
  display: flex;
  align-items: flex-start;
  gap: 0.75rem;
  background-color: rgba(45,108,223,0.04);
  border: 1px solid rgba(45,108,223,0.1);
  border-radius: var(--radius-lg);
  padding: 1.25rem 1.5rem;
  margin-bottom: 2.5rem;
}

.privacy-note-icon {
  width: 38px;
  height: 38px;
  border-radius: 9999px;
  background-color: rgba(45,108,223,0.1);
  color: var(--primary);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.privacy-note-icon svg {
  width: 18px;
  height: 18px;
}

.privacy-note h3 {
  font-size: 1rem;
  font-weight: 600;
  margin-bottom: 0.5rem;
  color: var(--text);
}

.privacy-note ul {
  list-style: none;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 1rem 2rem;
}

.privacy-note li {
  font-size: 0.875rem;
  color: var(--text-secondary);
  display: flex;
  align-items: center;
  gap: 0.375rem;
}

.privacy-note li svg {
  width: 15px;
  height: 15px;
  color: var(--success);
}

/* Footer */
.site-footer {
  background-color: #0F172A;
  color: #94A3B8;
  padding: 3.5rem 0 1.5rem;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr;
  gap: 2.5rem;
  margin-bottom: 2.5rem;
}

@media (max-width: 768px) {
  .footer-grid {
    grid-template-columns: 1fr;
    gap: 1.75rem;
  }
}

.footer-brand .logo {
  color: #fff;
  margin-bottom: 0.75rem;
}

.footer-brand .logo .text-primary {
  color: #60A5FA;
}

.footer-brand p {
  font-size: 0.875rem;
  line-height: 1.7;
  max-width: 300px;
}

.footer-title {
  font-size: 0.9375rem;
  font-weight: 600;
  color: #fff;
  margin-bottom: 1rem;
}

.footer-links {
  list-style: none;
  padding: 0;
}

.footer-links li {
  margin-bottom: 0.5rem;
}

.footer-links a {
  color: #94A3B8;
  font-size: 0.875rem;
  transition: color 0.15s ease;
}

.footer-links a:hover {
  color: #E2E8F0;
}

.footer-contact {
  list-style: none;
  padding: 0;
}

.footer-contact li {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.875rem;
  margin-bottom: 0.625rem;
}

.footer-contact svg {
  width: 16px;
  height: 16px;
  color: #60A5FA;
  flex-shrink: 0;
}

.footer-bottom {
  border-top: 1px solid rgba(148,163,184,0.15);
  padding-top: 1.5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 0.75rem;
  font-size: 0.8125rem;
}

.footer-bottom a {
  color: #64748B;
}

.footer-bottom a:hover {
  color: #94A3B8;
}

/* Modal */
.modal-overlay {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  z-index: 100;
  background-color: rgba(15,23,42,0.5);
  backdrop-filter: blur(4px);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1rem;
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.25s ease, visibility 0.25s ease;
}

.modal-overlay.open {
  opacity: 1;
  visibility: visible;
}

.modal-panel {
  background-color: #fff;
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-lg);
  width: 100%;
  max-width: 480px;
  padding: 2rem;
  transform: translateY(20px) scale(0.96);
  transition: transform 0.25s ease;
  max-height: calc(100vh - 2rem);
  overflow-y: auto;
}

.modal-overlay.open .modal-panel {
  transform: translateY(0) scale(1);
}

.modal-close {
  position: absolute;
  top: 1rem;
  right: 1rem;
  width: 36px;
  height: 36px;
  border-radius: 9999px;
  border: none;
  background-color: #F1F5F9;
  color: var(--text-secondary);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background-color 0.15s ease, color 0.15s ease;
}

.modal-close:hover {
  background-color: #E2E8F0;
  color: var(--text);
}

.modal-close svg {
  width: 18px;
  height: 18px;
}

.modal-icon {
  width: 48px;
  height: 48px;
  border-radius: 9999px;
  background-color: rgba(45,108,223,0.1);
  color: var(--primary);
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 1rem;
}

.modal-icon svg {
  width: 22px;
  height: 22px;
}

.modal-title {
  font-size: 1.375rem;
  font-weight: 700;
  text-align: center;
  margin-bottom: 0.5rem;
  color: var(--text);
}

.modal-desc {
  text-align: center;
  color: var(--text-secondary);
  font-size: 0.875rem;
  margin-bottom: 1.5rem;
}

.form-group {
  margin-bottom: 1rem;
}

.form-label {
  display: block;
  font-size: 0.8125rem;
  font-weight: 500;
  color: var(--text-secondary);
  margin-bottom: 0.375rem;
}

.form-input,
.form-select,
.form-textarea {
  width: 100%;
  padding: 0.625rem 0.875rem;
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  background-color: var(--bg);
  font-size: 0.9375rem;
  color: var(--text);
  transition: border-color 0.15s ease, box-shadow 0.15s ease;
  outline: none;
}

.form-input:focus,
.form-select:focus,
.form-textarea:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 4px rgba(45,108,223,0.12);
  background-color: #fff;
}

.form-textarea {
  resize: vertical;
  min-height: 72px;
}

.form-error {
  display: none;
  color: var(--danger);
  font-size: 0.75rem;
  margin-top: 0.25rem;
}

.form-group.has-error .form-input,
.form-group.has-error .form-select {
  border-color: var(--danger);
}

.form-group.has-error .form-error {
  display: block;
}

.modal-privacy {
  display: flex;
  align-items: center;
  gap: 0.375rem;
  font-size: 0.75rem;
  color: var(--text-muted);
  margin: 0.75rem 0 1rem;
  justify-content: center;
}

.modal-privacy svg {
  width: 13px;
  height: 13px;
  color: var(--success);
}

/* Responsive */
@media (max-width: 1023px) {
  .search-wrap {
    display: none;
  }
  .nav-links {
    display: none;
  }
  .hero-grid {
    grid-template-columns: 1fr;
    gap: 2rem;
  }
}

@media (min-width: 1024px) {
  .mobile-actions {
    display: none !important;
  }
  .mobile-search-row,
  .mobile-menu {
    display: none !important;
  }
}

@media (max-width: 640px) {
  .section {
    padding: 2.5rem 0;
  }
  .cta-banner {
    padding: 1.75rem;
    flex-direction: column;
    align-items: flex-start;
  }
  .modal-panel {
    padding: 1.5rem;
  }
}

/* roulang page: category1 */
:root {
            --color-primary: #2D6CDF;
            --color-primary-dark: #1E56C4;
            --color-primary-light: rgba(45, 108, 223, 0.1);
            --color-secondary: #0D9488;
            --color-ink: #0F172A;
            --color-muted: #475569;
            --color-faint: #94A3B8;
            --color-line: #E2E8F0;
            --color-canvas: #F8FAFC;
            --color-success: #059669;
            --color-warning: #D97706;
            --color-error: #DC2626;
            --radius-sm: 0.375rem;
            --radius-md: 0.5rem;
            --radius-lg: 0.75rem;
            --radius-xl: 1rem;
            --shadow-card: 0 1px 3px rgba(15, 23, 42, 0.06), 0 4px 12px rgba(15, 23, 42, 0.04);
            --shadow-hover: 0 4px 8px rgba(15, 23, 42, 0.08), 0 12px 24px rgba(15, 23, 42, 0.08);
            --shadow-pop: 0 20px 40px rgba(15, 23, 42, 0.15);
        }

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

        html {
            scroll-behavior: smooth;
        }

        body {
            margin: 0;
            font-family: system-ui, -apple-system, 'Segoe UI', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', sans-serif;
            font-size: 16px;
            line-height: 1.75;
            background: #ffffff;
            color: var(--color-ink);
            -webkit-font-smoothing: antialiased;
        }

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

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

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

        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding-left: 1rem;
            padding-right: 1rem;
        }

        @media (min-width: 768px) {
            .container {
                padding-left: 1.5rem;
                padding-right: 1.5rem;
            }
        }

        .text-primary {
            color: var(--color-primary) !important;
        }

        .bg-primary {
            background-color: var(--color-primary) !important;
        }

        .text-secondary {
            color: var(--color-secondary) !important;
        }

        .bg-canvas {
            background-color: var(--color-canvas) !important;
        }

        /* ============ Header / Nav ============ */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 50;
            background: rgba(255, 255, 255, 0.92);
            backdrop-filter: blur(8px);
            border-bottom: 1px solid var(--color-line);
        }

        .header-inner {
            display: flex;
            align-items: center;
            height: 64px;
            gap: 1.25rem;
        }

        .logo {
            display: inline-flex;
            align-items: center;
            gap: 0.625rem;
            font-size: 1.15rem;
            font-weight: 800;
            color: var(--color-ink);
            white-space: nowrap;
            flex-shrink: 0;
        }

        .logo-icon {
            width: 36px;
            height: 36px;
            flex-shrink: 0;
        }

        .search-box {
            flex: 1;
            max-width: 420px;
            height: 40px;
            display: flex;
            align-items: center;
            gap: 0.5rem;
            background: #F1F5F9;
            border-radius: 9999px;
            padding: 0 1rem;
            border: 1px solid transparent;
            transition: all 0.15s ease;
        }

        .search-box:focus-within {
            border-color: var(--color-primary);
            box-shadow: 0 0 0 4px rgba(45, 108, 223, 0.15);
            background: #ffffff;
        }

        .search-box svg {
            width: 18px;
            height: 18px;
            color: var(--color-faint);
            flex-shrink: 0;
        }

        .search-box input {
            flex: 1;
            border: none;
            outline: none;
            background: transparent;
            font-size: 0.9375rem;
            color: var(--color-ink);
            min-width: 0;
        }

        .search-box input::placeholder {
            color: var(--color-faint);
        }

        .nav-links {
            display: flex;
            align-items: center;
            gap: 0.375rem;
            margin-left: auto;
        }

        .nav-item {
            display: inline-flex;
            align-items: center;
            padding: 0.375rem 0.875rem;
            border-radius: 9999px;
            font-size: 0.9375rem;
            font-weight: 500;
            color: var(--color-muted);
            transition: all 0.15s ease;
            white-space: nowrap;
        }

        .nav-item:hover {
            background: rgba(45, 108, 223, 0.08);
            color: var(--color-primary);
        }

        .nav-item.active {
            background: rgba(45, 108, 223, 0.1);
            color: var(--color-primary);
            font-weight: 600;
        }

        .cta-btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            background: var(--color-primary);
            color: #ffffff;
            border: none;
            border-radius: 9999px;
            padding: 0.5rem 1.125rem;
            font-size: 0.875rem;
            font-weight: 600;
            cursor: pointer;
            white-space: nowrap;
            transition: all 0.15s ease;
            flex-shrink: 0;
            height: 38px;
        }

        .cta-btn:hover {
            background: var(--color-primary-dark);
            transform: translateY(-1px);
            box-shadow: 0 4px 12px rgba(45, 108, 223, 0.25);
        }

        .cta-btn:active {
            transform: scale(0.97);
        }

        .mobile-menu-btn {
            display: none;
            width: 40px;
            height: 40px;
            border: 1px solid var(--color-line);
            background: #ffffff;
            border-radius: 0.5rem;
            cursor: pointer;
            align-items: center;
            justify-content: center;
            color: var(--color-ink);
            flex-shrink: 0;
        }

        .mobile-menu-btn svg {
            width: 22px;
            height: 22px;
        }

        .mobile-panel {
            display: none;
            padding: 0.75rem 1rem 1rem;
            border-top: 1px solid var(--color-line);
            background: #ffffff;
        }

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

        .mobile-panel .search-box {
            max-width: none;
            margin-bottom: 0.75rem;
        }

        .mobile-panel .nav-links {
            display: flex;
            flex-direction: column;
            align-items: stretch;
            gap: 0.5rem;
            margin-left: 0;
        }

        .mobile-panel .nav-item {
            border-radius: 0.5rem;
            padding: 0.625rem 0.875rem;
        }

        @media (max-width: 1024px) {
            .nav-links.hidden-desktop {
                display: none;
            }

            .mobile-menu-btn {
                display: inline-flex;
            }
        }

        @media (max-width: 768px) {
            .desktop-search {
                display: none;
            }

            .header-inner {
                gap: 0.75rem;
            }
        }

        @media (min-width: 769px) {
            .mobile-search-row {
                display: none;
            }
        }

        /* ============ Page Hero ============ */
        .page-hero {
            background: var(--color-canvas);
            padding: 3rem 0 3.5rem;
            border-bottom: 1px solid var(--color-line);
            position: relative;
        }

        .page-hero::before {
            content: '';
            position: absolute;
            top: 0;
            right: 0;
            width: 360px;
            height: 360px;
            background-image: radial-gradient(circle at 1px 1px, #CBD5E1 1px, transparent 0);
            background-size: 24px 24px;
            opacity: 0.35;
            pointer-events: none;
        }

        .breadcrumb {
            display: flex;
            align-items: center;
            gap: 0.5rem;
            font-size: 0.875rem;
            color: var(--color-faint);
            margin-bottom: 1.5rem;
            flex-wrap: wrap;
        }

        .breadcrumb a {
            color: var(--color-muted);
            transition: color 0.15s ease;
        }

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

        .breadcrumb .sep {
            color: var(--color-line);
        }

        .page-hero-title {
            font-size: clamp(1.75rem, 3vw, 2.5rem);
            font-weight: 800;
            line-height: 1.2;
            margin: 0 0 1rem;
            color: var(--color-ink);
            display: flex;
            align-items: center;
            gap: 0.75rem;
            flex-wrap: wrap;
        }

        .page-hero-desc {
            font-size: 1rem;
            color: var(--color-muted);
            line-height: 1.75;
            max-width: 640px;
            margin: 0 0 1.25rem;
        }

        .page-hero-meta {
            display: flex;
            flex-wrap: wrap;
            gap: 0.625rem;
        }

        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 0.375rem;
            background: rgba(45, 108, 223, 0.08);
            color: var(--color-primary);
            border-radius: 9999px;
            padding: 0.25rem 0.875rem;
            font-size: 0.8125rem;
            font-weight: 500;
        }

        .page-hero-figure {
            border-radius: 1rem;
            overflow: hidden;
            box-shadow: var(--shadow-card);
            position: relative;
        }

        .page-hero-figure img {
            width: 100%;
            height: 260px;
            object-fit: cover;
        }

        @media (max-width: 767px) {
            .page-hero {
                padding: 2rem 0 2.5rem;
            }

            .page-hero-figure {
                margin-top: 1.5rem;
            }

            .page-hero-figure img {
                height: 200px;
            }
        }

        /* ============ Section ============ */
        .section {
            padding: 4rem 0;
        }

        .section-tight {
            padding: 3rem 0;
        }

        .section-header {
            margin-bottom: 2.5rem;
            max-width: 720px;
        }

        .section-eyebrow {
            display: inline-flex;
            align-items: center;
            background: rgba(45, 108, 223, 0.08);
            color: var(--color-primary);
            font-size: 0.8125rem;
            font-weight: 600;
            border-radius: 9999px;
            padding: 0.25rem 0.875rem;
            margin-bottom: 0.875rem;
        }

        .section-title {
            font-size: clamp(1.5rem, 2.5vw, 2.125rem);
            font-weight: 700;
            line-height: 1.3;
            margin: 0 0 0.75rem;
            color: var(--color-ink);
        }

        .section-subtitle {
            font-size: 0.9375rem;
            color: var(--color-muted);
            line-height: 1.75;
            margin: 0;
        }

        /* ============ Cards ============ */
        .card-grid {
            display: grid;
            grid-template-columns: 1fr;
            gap: 1.5rem;
        }

        @media (min-width: 640px) {
            .card-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }

        @media (min-width: 1024px) {
            .card-grid.cards-3 {
                grid-template-columns: repeat(3, 1fr);
            }
            .card-grid.cards-4 {
                grid-template-columns: repeat(4, 1fr);
            }
        }

        .card {
            background: #ffffff;
            border: 1px solid var(--color-line);
            border-radius: var(--radius-lg);
            box-shadow: var(--shadow-card);
            padding: 1.5rem;
            transition: all 0.15s ease;
            display: flex;
            flex-direction: column;
            height: 100%;
        }

        .card:hover {
            box-shadow: var(--shadow-hover);
            transform: translateY(-2px);
            border-color: rgba(45, 108, 223, 0.3);
        }

        .card-icon {
            width: 44px;
            height: 44px;
            border-radius: 50%;
            background: rgba(45, 108, 223, 0.1);
            display: flex;
            align-items: center;
            justify-content: center;
            margin-bottom: 1rem;
            flex-shrink: 0;
        }

        .card-icon svg {
            width: 22px;
            height: 22px;
            color: var(--color-primary);
        }

        .card h3 {
            font-size: 1.125rem;
            font-weight: 600;
            margin: 0 0 0.5rem;
            color: var(--color-ink);
        }

        .card p {
            font-size: 0.9375rem;
            color: var(--color-muted);
            line-height: 1.75;
            margin: 0 0 1rem;
            flex: 1;
        }

        .card-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 0.375rem;
            margin-bottom: 1rem;
        }

        .tag {
            display: inline-flex;
            align-items: center;
            background: rgba(13, 148, 136, 0.1);
            color: #0F766E;
            font-size: 0.75rem;
            font-weight: 500;
            border-radius: var(--radius-sm);
            padding: 0.125rem 0.625rem;
        }

        .card-link {
            display: inline-flex;
            align-items: center;
            gap: 0.375rem;
            font-size: 0.9375rem;
            font-weight: 500;
            color: var(--color-primary);
            transition: gap 0.15s ease;
        }

        .card-link:hover {
            gap: 0.625rem;
        }

        .card-link svg {
            width: 16px;
            height: 16px;
        }

        /* ============ Feature split ============ */
        .feature-row {
            display: grid;
            grid-template-columns: 1fr;
            gap: 2.5rem;
            align-items: center;
            padding: 1rem 0;
        }

        @media (min-width: 768px) {
            .feature-row {
                grid-template-columns: 1fr 1fr;
                gap: 3rem;
            }
        }

        .feature-figure {
            border-radius: 1rem;
            overflow: hidden;
            box-shadow: var(--shadow-card);
        }

        .feature-figure img {
            width: 100%;
            height: 240px;
            object-fit: cover;
        }

        .feature-content h3 {
            font-size: 1.25rem;
            font-weight: 600;
            margin: 0 0 0.75rem;
            color: var(--color-ink);
        }

        .feature-content p {
            font-size: 0.9375rem;
            color: var(--color-muted);
            line-height: 1.75;
            margin: 0 0 1rem;
        }

        .feature-list {
            list-style: none;
            padding: 0;
            margin: 0;
            display: grid;
            gap: 0.625rem;
        }

        .feature-list li {
            display: flex;
            align-items: flex-start;
            gap: 0.625rem;
            font-size: 0.9375rem;
            color: var(--color-muted);
        }

        .feature-list svg {
            width: 20px;
            height: 20px;
            color: var(--color-success);
            flex-shrink: 0;
            margin-top: 0.125rem;
        }

        /* ============ Steps ============ */
        .steps-grid {
            display: grid;
            grid-template-columns: 1fr;
            gap: 1.5rem;
            counter-reset: step;
        }

        @media (min-width: 640px) {
            .steps-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }

        @media (min-width: 1024px) {
            .steps-grid {
                grid-template-columns: repeat(4, 1fr);
            }
        }

        .step-item {
            position: relative;
            background: #ffffff;
            border: 1px solid var(--color-line);
            border-radius: var(--radius-lg);
            padding: 1.5rem;
            box-shadow: var(--shadow-card);
            transition: all 0.15s ease;
        }

        .step-item:hover {
            box-shadow: var(--shadow-hover);
            transform: translateY(-2px);
        }

        .step-num {
            display: flex;
            align-items: center;
            justify-content: center;
            width: 40px;
            height: 40px;
            border-radius: 50%;
            background: rgba(45, 108, 223, 0.1);
            color: var(--color-primary);
            font-weight: 700;
            font-size: 1rem;
            margin-bottom: 1rem;
        }

        .step-item h3 {
            font-size: 1.0625rem;
            font-weight: 600;
            margin: 0 0 0.5rem;
            color: var(--color-ink);
        }

        .step-item p {
            font-size: 0.875rem;
            color: var(--color-muted);
            line-height: 1.7;
            margin: 0;
        }

        /* ============ FAQ ============ */
        .faq-list {
            display: grid;
            gap: 0.875rem;
            max-width: 820px;
            margin: 0 auto;
        }

        .faq-item {
            background: #ffffff;
            border: 1px solid var(--color-line);
            border-radius: var(--radius-lg);
            overflow: hidden;
            transition: all 0.2s ease;
        }

        .faq-item.open {
            border-color: var(--color-primary);
            background: rgba(45, 108, 223, 0.02);
            box-shadow: var(--shadow-card);
        }

        .faq-question {
            width: 100%;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 1rem;
            padding: 1.125rem 1.25rem;
            background: transparent;
            border: none;
            font-size: 1rem;
            font-weight: 600;
            color: var(--color-ink);
            cursor: pointer;
            text-align: left;
            transition: color 0.15s ease;
        }

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

        .faq-icon {
            width: 28px;
            height: 28px;
            border-radius: 50%;
            background: rgba(45, 108, 223, 0.08);
            display: flex;
            align-items: center;
            justify-content: center;
            flex-shrink: 0;
            transition: all 0.3s ease;
        }

        .faq-icon svg {
            width: 14px;
            height: 14px;
            color: var(--color-primary);
            transition: transform 0.3s ease;
        }

        .faq-item.open .faq-icon svg {
            transform: rotate(180deg);
        }

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

        .faq-answer-inner {
            padding: 0 1.25rem 1.25rem;
            font-size: 0.9375rem;
            line-height: 1.75;
            color: var(--color-muted);
        }

        /* ============ CTA Band ============ */
        .cta-band {
            background: rgba(45, 108, 223, 0.06);
            border: 1px solid rgba(45, 108, 223, 0.12);
            border-radius: 1.25rem;
            padding: 2.5rem;
            display: flex;
            flex-direction: column;
            gap: 1.5rem;
            align-items: flex-start;
        }

        @media (min-width: 768px) {
            .cta-band {
                padding: 3rem;
                flex-direction: row;
                align-items: center;
                justify-content: space-between;
            }
        }

        .cta-band h2 {
            font-size: clamp(1.375rem, 2vw, 1.75rem);
            font-weight: 700;
            margin: 0 0 0.5rem;
            color: var(--color-ink);
        }

        .cta-band p {
            font-size: 0.9375rem;
            color: var(--color-muted);
            margin: 0;
            max-width: 520px;
        }

        .cta-band .cta-btn {
            height: 46px;
            padding: 0 1.75rem;
            font-size: 0.9375rem;
            border-radius: 9999px;
            flex-shrink: 0;
        }

        /* ============ Footer ============ */
        .site-footer {
            background: #0F172A;
            color: #94A3B8;
            padding: 3.5rem 0 2rem;
            margin-top: 4rem;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 1fr;
            gap: 2.5rem;
            margin-bottom: 2.5rem;
        }

        @media (min-width: 768px) {
            .footer-grid {
                grid-template-columns: 2fr 1fr 1.5fr;
                gap: 3rem;
            }
        }

        .footer-brand .logo {
            margin-bottom: 1rem;
            color: #ffffff;
        }

        .footer-brand p {
            font-size: 0.875rem;
            line-height: 1.75;
            margin: 0;
            max-width: 340px;
            color: #94A3B8;
        }

        .footer-title {
            color: #ffffff;
            font-size: 0.9375rem;
            font-weight: 600;
            margin: 0 0 1rem;
        }

        .footer-links {
            list-style: none;
            padding: 0;
            margin: 0;
            display: grid;
            gap: 0.625rem;
        }

        .footer-links a {
            font-size: 0.9375rem;
            color: #94A3B8;
            transition: color 0.15s ease;
        }

        .footer-links a:hover {
            color: #ffffff;
        }

        .footer-contact {
            list-style: none;
            padding: 0;
            margin: 0;
            display: grid;
            gap: 0.75rem;
        }

        .footer-contact li {
            display: flex;
            align-items: center;
            gap: 0.625rem;
            font-size: 0.875rem;
            color: #94A3B8;
        }

        .footer-contact svg {
            width: 18px;
            height: 18px;
            flex-shrink: 0;
            color: #64748B;
        }

        .footer-bottom {
            border-top: 1px solid #1E293B;
            padding-top: 1.5rem;
            display: flex;
            flex-direction: column;
            gap: 0.5rem;
            justify-content: space-between;
            align-items: center;
            text-align: center;
        }

        @media (min-width: 768px) {
            .footer-bottom {
                flex-direction: row;
                text-align: left;
            }
        }

        .footer-bottom span {
            font-size: 0.875rem;
            color: #64748B;
        }

        /* ============ Modal ============ */
        .modal-overlay {
            position: fixed;
            inset: 0;
            background: rgba(15, 23, 42, 0.5);
            backdrop-filter: blur(4px);
            z-index: 100;
            display: none;
            align-items: center;
            justify-content: center;
            padding: 1rem;
        }

        .modal-overlay.active {
            display: flex;
        }

        .modal {
            background: #ffffff;
            border-radius: 1rem;
            box-shadow: var(--shadow-pop);
            max-width: 480px;
            width: 100%;
            padding: 2rem;
            position: relative;
            animation: modalIn 0.2s ease;
        }

        @keyframes modalIn {
            from {
                opacity: 0;
                transform: translateY(12px) scale(0.97);
            }
            to {
                opacity: 1;
                transform: translateY(0) scale(1);
            }
        }

        .modal-close {
            position: absolute;
            top: 1rem;
            right: 1rem;
            width: 32px;
            height: 32px;
            border: 1px solid var(--color-line);
            border-radius: 0.5rem;
            background: #ffffff;
            cursor: pointer;
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--color-muted);
            transition: all 0.15s ease;
        }

        .modal-close:hover {
            background: #F1F5F9;
            color: var(--color-ink);
        }

        .modal-close svg {
            width: 16px;
            height: 16px;
        }

        .modal h3 {
            font-size: 1.25rem;
            font-weight: 700;
            margin: 0 0 0.5rem;
            color: var(--color-ink);
        }

        .modal-desc {
            font-size: 0.875rem;
            color: var(--color-muted);
            margin: 0 0 1.5rem;
        }

        .form-group {
            margin-bottom: 1rem;
        }

        .form-group label {
            display: block;
            font-size: 0.875rem;
            font-weight: 500;
            color: var(--color-ink);
            margin-bottom: 0.375rem;
        }

        .form-group input,
        .form-group select,
        .form-group textarea {
            width: 100%;
            border: 1px solid var(--color-line);
            border-radius: 0.5rem;
            background: #F8FAFC;
            padding: 0.625rem 0.875rem;
            font-size: 0.9375rem;
            color: var(--color-ink);
            outline: none;
            transition: all 0.15s ease;
        }

        .form-group input:focus,
        .form-group select:focus,
        .form-group textarea:focus {
            border-color: var(--color-primary);
            background: #ffffff;
            box-shadow: 0 0 0 4px rgba(45, 108, 223, 0.15);
        }

        .form-group textarea {
            resize: vertical;
            min-height: 80px;
        }

        .privacy-note {
            display: flex;
            align-items: center;
            gap: 0.5rem;
            font-size: 0.8125rem;
            color: var(--color-faint);
            margin: 1rem 0;
        }

        .privacy-note svg {
            width: 16px;
            height: 16px;
            color: var(--color-secondary);
            flex-shrink: 0;
        }

        .submit-btn {
            width: 100%;
            height: 44px;
            background: var(--color-primary);
            color: #ffffff;
            border: none;
            border-radius: 0.5rem;
            font-size: 0.9375rem;
            font-weight: 600;
            cursor: pointer;
            transition: all 0.15s ease;
        }

        .submit-btn:hover {
            background: var(--color-primary-dark);
        }

        .submit-btn:active {
            transform: scale(0.98);
        }

        .submit-btn:disabled {
            background: #CBD5E1;
            cursor: not-allowed;
        }

        .submit-btn.success {
            background: var(--color-success);
        }

        /* ============ Scroll margin ============ */
        .anchor-section {
            scroll-margin-top: 80px;
        }

        @media (max-width: 640px) {
            .section {
                padding: 2.5rem 0;
            }

            .cta-band {
                padding: 1.75rem 1.25rem;
            }
        }

/* roulang page: article */
:root {
  --primary: #2D6CDF;
  --primary-dark: #1E56C4;
  --secondary: #0D9488;
  --success: #059669;
  --warning: #D97706;
  --error: #DC2626;
  --bg: #F8FAFC;
  --text: #0F172A;
  --text-secondary: #475569;
  --text-muted: #94A3B8;
  --border: #E2E8F0;
  --card-shadow: 0 1px 3px rgba(15,23,42,.06), 0 4px 12px rgba(15,23,42,.04);
  --card-shadow-hover: 0 4px 8px rgba(15,23,42,.08), 0 12px 24px rgba(15,23,42,.08);
  --radius-sm: .375rem;
  --radius-md: .5rem;
  --radius-lg: .75rem;
  --radius-xl: 1rem;
}
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; scroll-padding-top: 80px; }
body {
  font-family: system-ui, -apple-system, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; height: auto; display: block; }
a { text-decoration: none; color: inherit; }
button { font-family: inherit; cursor: pointer; }
input, select, textarea { font-family: inherit; }
.container { max-width: 1200px; margin: 0 auto; padding: 0 1.5rem; }

/* ==================== Header ==================== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(255,255,255,.92);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--border);
}
.header-inner { display: flex; align-items: center; gap: 1rem; height: 64px; }
.logo { display: flex; align-items: center; gap: .5rem; font-weight: 800; font-size: 1.1rem; color: var(--text); white-space: nowrap; }
.logo-icon { width: 34px; height: 34px; flex-shrink: 0; }
.logo .text-primary { color: var(--primary); }
.header-search { flex: 1; max-width: 400px; margin: 0 auto; position: relative; }
.search-wrap { display: flex; align-items: center; gap: .5rem; background: #F1F5F9; border-radius: 9999px; padding: 0 .9rem; height: 40px; border: 1px solid transparent; transition: all .15s ease; }
.search-wrap:focus-within { border-color: var(--primary); box-shadow: 0 0 0 4px rgba(45,108,223,.15); background: #fff; }
.search-wrap svg { width: 18px; height: 18px; color: var(--text-muted); flex-shrink: 0; }
.search-wrap input { flex: 1; border: none; outline: none; background: transparent; font-size: .9375rem; color: var(--text); }
.search-wrap input::placeholder { color: var(--text-muted); }
.nav-links { display: flex; align-items: center; gap: .5rem; }
.nav-item { font-size: .9375rem; color: var(--text-secondary); font-weight: 500; padding: .375rem .75rem; border-radius: .5rem; transition: all .15s ease; white-space: nowrap; }
.nav-item:hover { color: var(--primary); background: rgba(45,108,223,.06); }
.nav-item.active { color: var(--primary); background: rgba(45,108,223,.08); font-weight: 600; }
.header-actions { display: flex; align-items: center; gap: .75rem; margin-left: auto; }
.btn-consult { display: inline-flex; align-items: center; gap: .375rem; background: var(--primary); color: #fff; font-size: .875rem; font-weight: 600; padding: .5rem 1rem; border-radius: 9999px; border: none; transition: all .15s ease; white-space: nowrap; }
.btn-consult:hover { background: var(--primary-dark); }
.btn-consult:active { transform: scale(.98); }
.btn-consult:focus-visible { outline: 2px solid var(--primary); outline-offset: 2px; }
.mobile-menu-btn { display: none; background: none; border: 1px solid var(--border); border-radius: .5rem; padding: .375rem; color: var(--text); align-items: center; justify-content: center; }
.mobile-menu-btn:hover { background: #F1F5F9; }
.mobile-search-row { display: none; padding: .75rem 1.5rem 1rem; background: #fff; border-bottom: 1px solid var(--border); }
.mobile-search-row .search-wrap { background: #F1F5F9; }
.mobile-menu { display: none; padding: .5rem 1.5rem 1rem; background: #fff; border-bottom: 1px solid var(--border); }
.mobile-menu a { display: block; padding: .75rem .5rem; font-size: .9375rem; color: var(--text); border-bottom: 1px solid #F1F5F9; transition: color .15s ease; }
.mobile-menu a:last-child { border-bottom: none; }
.mobile-menu a:hover { color: var(--primary); }
.mobile-menu.open { display: block; }

@media (max-width: 1023px) {
  .nav-links { display: none; }
  .header-actions .btn-consult { display: none; }
  .mobile-menu-btn { display: inline-flex; }
  .header-search { display: none; }
  .mobile-search-row { display: block; }
  .logo { font-size: 1rem; }
}
@media (min-width: 1024px) {
  .mobile-search-row, .mobile-menu { display: none !important; }
}
@media (max-width: 640px) {
  .header-inner { height: 56px; gap: .75rem; }
  .container { padding: 0 1rem; }
  .logo-icon { width: 30px; height: 30px; }
  .logo span { font-size: .9375rem; }
}

/* ==================== 文章详情页 ==================== */
.article-page { padding: 2.5rem 0 4rem; }
.article-wrap { max-width: 800px; margin: 0 auto; }
.breadcrumb { display: flex; flex-wrap: wrap; align-items: center; gap: .5rem; font-size: .875rem; color: var(--text-muted); margin-bottom: 1.5rem; }
.breadcrumb a { color: var(--text-secondary); transition: color .15s ease; }
.breadcrumb a:hover { color: var(--primary); }
.breadcrumb .sep { color: #CBD5E1; }
.breadcrumb .current { color: var(--text-muted); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; max-width: 280px; }

.article-card { background: #fff; border-radius: var(--radius-xl); box-shadow: var(--card-shadow); border: 1px solid var(--border); padding: 2.5rem 3rem; }
.article-title { font-size: clamp(1.6rem, 3vw, 2.1rem); font-weight: 800; line-height: 1.3; color: var(--text); margin-bottom: 1rem; }
.article-meta { display: flex; flex-wrap: wrap; align-items: center; gap: .8rem; font-size: .875rem; color: var(--text-muted); padding-bottom: 1.5rem; margin-bottom: 1.75rem; border-bottom: 1px solid #F1F5F9; }
.article-meta .badge { display: inline-flex; align-items: center; gap: .25rem; background: rgba(45,108,223,.08); color: var(--primary); font-weight: 600; padding: .25rem .625rem; border-radius: var(--radius-sm); font-size: .8125rem; }
.article-meta .badge svg { width: 14px; height: 14px; }
.article-meta .dot { width: 4px; height: 4px; border-radius: 50%; background: #CBD5E1; flex-shrink: 0; }

.article-content { font-size: 1.0625rem; line-height: 1.8; color: #334155; word-wrap: break-word; }
.article-content h2 { font-size: 1.5rem; font-weight: 700; color: var(--text); margin: 2.2rem 0 1rem; line-height: 1.4; }
.article-content h3 { font-size: 1.2rem; font-weight: 600; color: var(--text); margin: 1.6rem 0 .75rem; line-height: 1.4; }
.article-content h4 { font-size: 1.05rem; font-weight: 600; color: var(--text); margin: 1.2rem 0 .5rem; }
.article-content p { margin-bottom: 1.5em; }
.article-content ul, .article-content ol { margin: 1rem 0 1.5rem 1.25rem; }
.article-content ul { list-style: disc; }
.article-content ol { list-style: decimal; }
.article-content li { margin-bottom: .5rem; }
.article-content blockquote { border-left: 4px solid var(--primary); background: #F8FAFC; padding: 1rem 1.25rem; border-radius: 0 var(--radius-md) var(--radius-md) 0; margin: 1.5rem 0; color: var(--text-secondary); }
.article-content a { color: var(--primary); text-decoration: underline; text-underline-offset: 2px; }
.article-content a:hover { color: var(--primary-dark); }
.article-content img { border-radius: var(--radius-lg); margin: 1.5rem 0; }
.article-content table { width: 100%; border-collapse: collapse; margin: 1.5rem 0; font-size: .9375rem; overflow-x: auto; display: block; }
.article-content table th, .article-content table td { border: 1px solid var(--border); padding: .625rem .75rem; text-align: left; }
.article-content table th { background: #F8FAFC; font-weight: 600; }
.article-content table tr:nth-child(even) { background: #FAFBFC; }
.article-content code { background: #F1F5F9; padding: .125rem .375rem; border-radius: .25rem; font-size: .875rem; font-family: ui-monospace, SFMono-Regular, Menlo, monospace; }
.article-content pre { background: #0F172A; color: #E2E8F0; padding: 1.25rem 1.5rem; border-radius: var(--radius-md); overflow-x: auto; margin: 1.5rem 0; font-size: .875rem; line-height: 1.7; }
.article-content pre code { background: transparent; color: inherit; padding: 0; }

.not-found { text-align: center; padding: 4rem 2rem; background: #fff; border-radius: var(--radius-xl); border: 2px dashed #E2E8F0; }
.not-found .nf-icon { width: 64px; height: 64px; margin: 0 auto 1rem; color: var(--text-muted); }
.not-found h2 { font-size: 1.25rem; font-weight: 700; color: var(--text); margin-bottom: .5rem; }
.not-found p { color: var(--text-muted); font-size: .9375rem; margin-bottom: 1.5rem; }
.btn-back { display: inline-flex; align-items: center; gap: .375rem; background: var(--primary); color: #fff; font-weight: 600; font-size: .875rem; padding: .625rem 1.25rem; border-radius: var(--radius-md); border: none; transition: all .15s ease; }
.btn-back:hover { background: var(--primary-dark); }
.btn-back:active { transform: scale(.98); }

/* ==================== CTA 横幅 ==================== */
.article-cta { margin-top: 2rem; background: rgba(45,108,223,.06); border: 1px solid rgba(45,108,223,.15); border-radius: var(--radius-xl); padding: 1.75rem 2rem; display: flex; align-items: center; justify-content: space-between; gap: 1.5rem; flex-wrap: wrap; }
.article-cta h3 { font-size: 1.125rem; font-weight: 700; color: var(--text); margin-bottom: .375rem; }
.article-cta p { font-size: .875rem; color: var(--text-secondary); }
.article-cta .btn { display: inline-flex; align-items: center; gap: .375rem; background: var(--primary); color: #fff; font-weight: 600; font-size: .875rem; padding: .625rem 1.25rem; border-radius: var(--radius-md); border: none; transition: all .15s ease; white-space: nowrap; }
.article-cta .btn:hover { background: var(--primary-dark); }
.article-cta .btn:active { transform: scale(.98); }
.article-cta .btn:focus-visible { outline: 2px solid var(--primary); outline-offset: 2px; }

/* ==================== 信任提示 ==================== */
.trust-note { display: flex; align-items: flex-start; gap: .75rem; background: #fff; border: 1px solid var(--border); border-radius: var(--radius-lg); padding: 1.25rem 1.5rem; margin-top: 2rem; }
.trust-note svg { width: 20px; height: 20px; color: var(--secondary); flex-shrink: 0; margin-top: .25rem; }
.trust-note p { font-size: .875rem; color: var(--text-secondary); line-height: 1.7; }

/* ==================== 相关阅读 ==================== */
.related-section { margin-top: 3.5rem; scroll-margin-top: 80px; }
.related-section h2 { font-size: 1.5rem; font-weight: 700; color: var(--text); margin-bottom: .5rem; }
.related-section .sub { font-size: .9375rem; color: var(--text-muted); margin-bottom: 1.5rem; }
.related-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1.5rem; }
.related-card { background: #fff; border-radius: var(--radius-lg); border: 1px solid var(--border); box-shadow: var(--card-shadow); overflow: hidden; transition: all .15s ease; display: flex; flex-direction: column; }
.related-card:hover { transform: translateY(-2px); box-shadow: var(--card-shadow-hover); }
.related-card img { width: 100%; height: 150px; object-fit: cover; }
.related-card .body { padding: 1.25rem; flex: 1; display: flex; flex-direction: column; }
.related-card h3 { font-size: 1rem; font-weight: 600; color: var(--text); margin-bottom: .5rem; line-height: 1.4; }
.related-card p { font-size: .875rem; color: var(--text-secondary); line-height: 1.6; margin-bottom: .75rem; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; flex: 1; }
.related-card .more { font-size: .875rem; color: var(--primary); font-weight: 500; display: inline-flex; align-items: center; gap: .25rem; margin-top: auto; }
.related-card .more svg { width: 14px; height: 14px; transition: transform .15s ease; }
.related-card:hover .more svg { transform: translateX(4px); }

/* ==================== 弹层 ==================== */
.modal-overlay { position: fixed; inset: 0; background: rgba(15,23,42,.55); backdrop-filter: blur(4px); z-index: 100; display: none; align-items: center; justify-content: center; padding: 1rem; }
.modal-overlay.active { display: flex; }
.modal { background: #fff; border-radius: var(--radius-xl); max-width: 480px; width: 100%; padding: 2rem; box-shadow: 0 20px 40px rgba(15,23,42,.15); position: relative; max-height: 90vh; overflow-y: auto; animation: modalIn .25s ease; }
@keyframes modalIn { from { opacity: 0; transform: translateY(12px) scale(.98); } to { opacity: 1; transform: translateY(0) scale(1); } }
.modal-close { position: absolute; top: .75rem; right: .75rem; background: #F1F5F9; border: none; border-radius: var(--radius-md); width: 34px; height: 34px; display: flex; align-items: center; justify-content: center; color: var(--text-secondary); transition: all .15s ease; }
.modal-close:hover { background: #E2E8F0; color: var(--text); }
.modal-icon { width: 48px; height: 48px; border-radius: 50%; background: rgba(45,108,223,.1); display: flex; align-items: center; justify-content: center; color: var(--primary); margin-bottom: 1rem; }
.modal-icon svg { width: 24px; height: 24px; }
.modal h2 { font-size: 1.25rem; font-weight: 700; color: var(--text); margin-bottom: .375rem; }
.modal-sub { font-size: .875rem; color: var(--text-muted); margin-bottom: 1.5rem; line-height: 1.6; }
.form-group { margin-bottom: 1rem; }
.form-group label { display: block; font-size: .875rem; font-weight: 600; color: var(--text); margin-bottom: .375rem; }
.form-group input, .form-group select, .form-group textarea { width: 100%; border: 1px solid var(--border); border-radius: var(--radius-md); padding: .625rem .75rem; font-size: .9375rem; background: #F8FAFC; color: var(--text); outline: none; transition: all .15s ease; }
.form-group input:focus, .form-group select:focus, .form-group textarea:focus { border-color: var(--primary); box-shadow: 0 0 0 4px rgba(45,108,223,.15); background: #fff; }
.form-group textarea { resize: vertical; min-height: 72px; }
.form-privacy { display: flex; align-items: center; gap: .375rem; font-size: .8125rem; color: var(--text-muted); margin: 1rem 0; }
.form-privacy svg { flex-shrink: 0; }
.submit-btn { width: 100%; background: var(--primary); color: #fff; font-size: .9375rem; font-weight: 600; padding: .75rem; border: none; border-radius: var(--radius-md); transition: all .15s ease; cursor: pointer; }
.submit-btn:hover { background: var(--primary-dark); }
.submit-btn:active { transform: scale(.98); }
.submit-btn:disabled { background: #CBD5E1; cursor: not-allowed; }

/* ==================== Footer ==================== */
.site-footer { background: #0F172A; color: #94A3B8; padding: 3.5rem 0 0; margin-top: 3rem; }
.footer-grid { display: grid; grid-template-columns: 1.5fr 1fr 1fr; gap: 2.5rem; padding-bottom: 2.5rem; }
.footer-brand .logo { color: #fff; margin-bottom: 1rem; }
.footer-brand .logo .text-primary { color: #60A5FA; }
.footer-brand p { font-size: .875rem; color: #94A3B8; line-height: 1.7; }
.footer-title { font-size: .9375rem; font-weight: 700; color: #fff; margin-bottom: 1rem; }
.footer-links { list-style: none; }
.footer-links li { margin-bottom: .625rem; }
.footer-links a { font-size: .875rem; color: #94A3B8; transition: color .15s ease; }
.footer-links a:hover { color: #fff; }
.footer-contact { list-style: none; }
.footer-contact li { display: flex; align-items: center; gap: .5rem; font-size: .875rem; color: #94A3B8; margin-bottom: .75rem; }
.footer-contact svg { width: 16px; height: 16px; flex-shrink: 0; color: #60A5FA; }
.footer-bottom { border-top: 1px solid rgba(255,255,255,.08); padding: 1.25rem 0; display: flex; justify-content: space-between; flex-wrap: wrap; gap: .5rem; font-size: .8125rem; color: #64748B; }

/* ==================== 响应式断点 ==================== */
@media (max-width: 768px) {
  .article-page { padding: 1.5rem 0 3rem; }
  .article-card { padding: 1.5rem; }
  .related-grid { grid-template-columns: 1fr; }
  .article-cta { flex-direction: column; align-items: flex-start; }
  .trust-note { padding: 1rem 1.25rem; }
  .footer-grid { grid-template-columns: 1fr; gap: 1.5rem; }
  .footer-bottom { flex-direction: column; text-align: center; }
}
@media (max-width: 520px) {
  .article-card { padding: 1.25rem; border-radius: var(--radius-lg); }
  .article-title { font-size: 1.375rem; }
  .article-content { font-size: 1rem; }
  .article-meta { gap: .5rem; }
  .breadcrumb .current { max-width: 180px; }
  .related-card img { height: 130px; }
  .modal { padding: 1.5rem; }
}