/* roulang page: index */
/* ===== 设计变量 ===== */
:root {
  --primary: #4F46E5;
  --primary-dark: #4338CA;
  --secondary: #7C3AED;
  --accent: #F59E0B;
  --success: #10B981;
  --bg: #FAFAFA;
  --bg-light: #F5F3FF;
  --bg-dark: #18181B;
  --card: #FFFFFF;
  --text: #18181B;
  --text-sub: #52525B;
  --text-muted: #A1A1AA;
  --border: #E4E4E7;
  --radius-lg: 20px;
  --radius-md: 14px;
  --radius-sm: 10px;
  --radius-tag: 999px;
  --shadow: 0 8px 24px rgba(24,24,27,.06);
  --shadow-hover: 0 16px 40px rgba(79,70,229,.14);
  --container: 1200px;
  --space-section: 90px;
}

/* ===== Reset & Base ===== */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: "PingFang SC", "Microsoft YaHei", "HarmonyOS Sans SC", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.7;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
}

img {
  max-width: 100%;
  height: auto;
  display: block;
  object-fit: cover;
}

a {
  color: inherit;
  text-decoration: none;
  transition: color .25s ease;
}

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

button {
  font-family: inherit;
  border: none;
  background: none;
  cursor: pointer;
}

ul, ol {
  list-style: none;
}

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

.container {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 24px;
}

h1, h2, h3, h4 {
  line-height: 1.3;
  font-weight: 700;
  color: var(--text);
}

h1 {
  font-size: 44px;
  line-height: 1.2;
}

h2 {
  font-size: 30px;
  line-height: 1.3;
}

h3 {
  font-size: 18px;
  line-height: 1.4;
  font-weight: 600;
}

p {
  color: var(--text-sub);
  font-size: 15px;
  line-height: 1.7;
}

.section {
  padding: var(--space-section) 0;
}

.section-tag {
  display: inline-block;
  font-size: 13px;
  font-weight: 600;
  color: var(--primary);
  background: var(--bg-light);
  border-radius: var(--radius-tag);
  padding: 5px 14px;
  margin-bottom: 14px;
  letter-spacing: .5px;
}

/* ===== 按钮 ===== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  border-radius: var(--radius-sm);
  font-size: 15px;
  font-weight: 600;
  line-height: 1;
  padding: 0 24px;
  height: 44px;
  transition: all .28s ease;
  white-space: nowrap;
  border: 2px solid transparent;
  outline: none;
}

.btn-primary {
  background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
  color: #fff;
  border: none;
}

.btn-primary:hover {
  background: linear-gradient(135deg, #4338CA 0%, #6D28D9 100%);
  color: #fff;
  transform: translateY(-2px);
  box-shadow: var(--shadow-hover);
}

.btn-primary:focus-visible {
  outline: 3px solid rgba(79, 70, 229, .3);
  outline-offset: 2px;
}

.btn-primary:active {
  transform: translateY(1px);
  box-shadow: none;
}

.btn-lg {
  height: 52px;
  padding: 0 34px;
  font-size: 16px;
  border-radius: 12px;
}

.btn-sm {
  height: 36px;
  padding: 0 18px;
  font-size: 14px;
  border-radius: 8px;
}

.btn-ghost {
  background: rgba(255, 255, 255, .92);
  color: var(--text);
  border: 1px solid var(--border);
  box-shadow: 0 2px 8px rgba(24,24,27,.04);
}

.btn-ghost:hover {
  background: #fff;
  border-color: var(--primary);
  color: var(--primary);
  transform: translateY(-2px);
}

.btn-ghost:focus-visible {
  outline: 3px solid rgba(79, 70, 229, .2);
  outline-offset: 2px;
}

.btn-ghost:active {
  transform: translateY(1px);
}

.btn-outline {
  background: transparent;
  color: var(--primary);
  border: 2px solid var(--primary);
}

.btn-outline:hover {
  background: var(--primary);
  color: #fff;
  transform: translateY(-2px);
  box-shadow: var(--shadow-hover);
}

.btn-outline:focus-visible {
  outline: 3px solid rgba(79, 70, 229, .25);
  outline-offset: 2px;
}

.text-link {
  color: var(--primary);
  font-weight: 600;
  font-size: 15px;
  display: inline-flex;
  align-items: center;
  gap: 4px;
  transition: gap .25s ease;
}

.text-link:hover {
  gap: 8px;
  color: var(--primary-dark);
}

/* ===== 顶部导航 ===== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: rgba(255, 255, 255, .97);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid rgba(228, 228, 231, .8);
  height: 72px;
  transition: box-shadow .3s ease;
}

.site-header.scrolled {
  box-shadow: 0 4px 20px rgba(24, 24, 27, .06);
}

.header-inner {
  height: 72px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
}

.brand-logo {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 42px;
  height: 42px;
  border-radius: 12px;
  background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
  color: #fff;
  font-weight: 800;
  font-size: 18px;
  letter-spacing: .5px;
  box-shadow: 0 4px 12px rgba(79, 70, 229, .3);
}

.brand-text {
  font-size: 22px;
  font-weight: 700;
  color: var(--text);
  letter-spacing: .5px;
}

.main-nav {
  display: flex;
  align-items: center;
  gap: 4px;
}

.nav-link {
  display: flex;
  align-items: center;
  justify-content: center;
  height: 38px;
  padding: 0 16px;
  border-radius: var(--radius-tag);
  font-size: 15px;
  font-weight: 500;
  color: var(--text-sub);
  transition: all .25s ease;
  position: relative;
}

.nav-link:hover {
  background: var(--bg-light);
  color: var(--primary);
}

.nav-link.active {
  background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
  color: #fff;
  font-weight: 600;
  box-shadow: 0 4px 12px rgba(79, 70, 229, .25);
}

.nav-cta {
  display: none;
  margin-left: 8px;
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 8px;
}

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: 10px;
  border-radius: 8px;
  width: 44px;
  height: 44px;
  align-items: center;
  justify-content: center;
}

.nav-toggle span {
  width: 22px;
  height: 2px;
  background: var(--text);
  border-radius: 2px;
  transition: all .3s ease;
}

.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);
}

/* ===== Hero ===== */
.hero {
  position: relative;
  padding: 100px 0 80px;
  overflow: hidden;
  background: linear-gradient(180deg, #F5F3FF 0%, #FAFAFA 100%);
}

.hero-bg {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-image: url('/assets/images/backpic/back-1.webp');
  background-size: cover;
  background-position: center;
  opacity: .18;
  z-index: 0;
}

.hero-overlay {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: radial-gradient(ellipse at 30% 40%, rgba(79,70,229,.08) 0%, transparent 60%),
              radial-gradient(ellipse at 80% 80%, rgba(124,58,237,.06) 0%, transparent 55%);
  z-index: 1;
}

.hero-content {
  position: relative;
  z-index: 2;
  text-align: center;
  max-width: 760px;
}

.hero-chip {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: rgba(255,255,255,.9);
  border: 1px solid var(--border);
  border-radius: var(--radius-tag);
  padding: 6px 18px;
  font-size: 13px;
  font-weight: 600;
  color: var(--primary);
  box-shadow: 0 2px 8px rgba(24,24,27,.04);
  margin-bottom: 28px;
}

.hero-chip::before {
  content: '';
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--success);
  display: inline-block;
  animation: pulse 2s infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: .5; }
}

.hero h1 {
  font-size: 48px;
  font-weight: 800;
  margin-bottom: 20px;
  letter-spacing: 1px;
}

.hero h1 .h1-sub {
  display: block;
  font-size: 34px;
  font-weight: 600;
  color: var(--text-sub);
  margin-top: 8px;
  letter-spacing: 0;
}

.hero-sub {
  font-size: 17px;
  color: var(--text-sub);
  line-height: 1.7;
  max-width: 560px;
  margin: 0 auto 36px;
}

.hero-actions {
  display: flex;
  justify-content: center;
  gap: 16px;
  flex-wrap: wrap;
}

/* ===== Hero Stats ===== */
.hero-stats {
  position: relative;
  z-index: 2;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  margin-top: 80px;
}

.stat-card {
  background: rgba(255, 255, 255, .92);
  border-radius: var(--radius-lg);
  padding: 28px 20px;
  text-align: center;
  border: 1px solid rgba(228, 228, 231, .6);
  box-shadow: var(--shadow);
  transition: transform .3s ease, box-shadow .3s ease;
}

.stat-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-hover);
}

.stat-num {
  font-size: 36px;
  font-weight: 800;
  background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  font-variant-numeric: tabular-nums;
  line-height: 1.2;
  margin-bottom: 6px;
}

.stat-label {
  font-size: 14px;
  color: var(--text-sub);
  font-weight: 500;
}

/* ===== About ===== */
.about {
  padding: var(--space-section) 0;
}

.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items: center;
}

.about-text h2 {
  margin-bottom: 18px;
}

.about-text p {
  margin-bottom: 16px;
  color: var(--text-sub);
  font-size: 15px;
}

.about-text .text-link {
  margin-top: 10px;
}

.about-images {
  position: relative;
  padding-right: 20px;
}

.about-img-main {
  width: 100%;
  height: 340px;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow);
  object-fit: cover;
}

.about-img-sub {
  width: 55%;
  height: 180px;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-hover);
  position: absolute;
  bottom: -30px;
  right: -10px;
  border: 4px solid #fff;
  object-fit: cover;
}

/* ===== Chips 分类入口 ===== */
.chips-section {
  padding: var(--space-section) 0;
  background: var(--bg-light);
}

.section-head {
  text-align: center;
  margin-bottom: 48px;
}

.section-head h2 {
  margin-bottom: 8px;
}

.section-head p {
  color: var(--text-sub);
  font-size: 15px;
}

.chips-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.chip-card {
  background: var(--card);
  border-radius: var(--radius-lg);
  padding: 32px 28px;
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 8px;
  border: 1px solid var(--border);
  box-shadow: var(--shadow);
  transition: all .3s ease;
  position: relative;
  overflow: hidden;
}

.chip-card::after {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: linear-gradient(135deg, rgba(79,70,229,.02) 0%, rgba(124,58,237,.03) 100%);
  opacity: 0;
  transition: opacity .3s ease;
}

.chip-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-hover);
  border-color: rgba(79, 70, 229, .25);
}

.chip-card:hover::after {
  opacity: 1;
}

.chip-icon {
  width: 48px;
  height: 48px;
  border-radius: 14px;
  background: var(--bg-light);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 22px;
  margin-bottom: 8px;
  position: relative;
  z-index: 1;
}

.chip-text {
  font-size: 20px;
  font-weight: 700;
  color: var(--text);
  position: relative;
  z-index: 1;
}

.chip-desc {
  font-size: 14px;
  color: var(--text-muted);
  position: relative;
  z-index: 1;
}

.chip-arrow {
  position: absolute;
  top: 28px;
  right: 24px;
  font-size: 18px;
  color: var(--text-muted);
  transition: right .3s ease, color .3s ease;
  z-index: 1;
}

.chip-card:hover .chip-arrow {
  right: 18px;
  color: var(--primary);
}

/* ===== News Section ===== */
.news-section {
  padding: var(--space-section) 0;
}

.section-head-row {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  margin-bottom: 40px;
  flex-wrap: wrap;
  gap: 16px;
}

.section-head-row h2 {
  margin-bottom: 6px;
}

.section-head-row p {
  color: var(--text-sub);
  font-size: 15px;
}

.news-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}

.news-card {
  background: var(--card);
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--border);
  box-shadow: var(--shadow);
  transition: all .3s ease;
  display: flex;
  flex-direction: column;
}

.news-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-hover);
  border-color: rgba(79, 70, 229, .2);
}

.news-cover {
  display: block;
  overflow: hidden;
  aspect-ratio: 16/10;
}

.news-cover img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform .5s ease;
}

.news-card:hover .news-cover img {
  transform: scale(1.03);
}

.news-body {
  padding: 20px 22px 18px;
  display: flex;
  flex-direction: column;
  flex: 1;
}

.news-body .tag {
  display: inline-block;
  font-size: 12px;
  font-weight: 600;
  color: var(--primary);
  background: var(--bg-light);
  border-radius: var(--radius-tag);
  padding: 4px 12px;
  margin-bottom: 10px;
  align-self: flex-start;
}

.news-body h3 {
  font-size: 18px;
  line-height: 1.4;
  margin-bottom: 10px;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  min-height: 48px;
}

.news-body h3 a {
  color: var(--text);
}

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

.news-body .news-summary {
  font-size: 14px;
  color: var(--text-sub);
  line-height: 1.6;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
  margin-bottom: 16px;
  flex: 1;
}

.news-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 14px;
  border-top: 1px solid var(--border);
}

.news-meta time {
  font-size: 13px;
  color: var(--text-muted);
}

.news-meta a {
  font-size: 14px;
  color: var(--primary);
  font-weight: 600;
}

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

/* 空状态 */
.empty-state {
  grid-column: 1 / -1;
  text-align: center;
  padding: 60px 20px;
  background: var(--card);
  border-radius: var(--radius-lg);
  border: 1px dashed var(--border);
  color: var(--text-muted);
  font-size: 15px;
}

.empty-state::before {
  content: '📌';
  display: block;
  font-size: 36px;
  margin-bottom: 12px;
}

/* ===== Trust Section ===== */
.trust-section {
  background: var(--bg-dark);
  padding: 80px 0;
  color: #fff;
}

.trust-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 32px;
  margin-bottom: 48px;
}

.trust-item {
  text-align: center;
  padding: 20px;
}

.trust-num {
  font-size: 40px;
  font-weight: 800;
  background: linear-gradient(135deg, #818CF8 0%, #A78BFA 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  line-height: 1.2;
  margin-bottom: 8px;
  font-variant-numeric: tabular-nums;
}

.trust-label {
  font-size: 14px;
  color: rgba(255,255,255,.65);
}

.trust-badges {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 16px;
}

.trust-badges span {
  background: rgba(255,255,255,.06);
  border: 1px solid rgba(255,255,255,.1);
  border-radius: var(--radius-tag);
  padding: 10px 24px;
  font-size: 14px;
  font-weight: 500;
  color: rgba(255,255,255,.85);
  transition: all .3s ease;
}

.trust-badges span:hover {
  background: rgba(255,255,255,.12);
  border-color: rgba(129,140,248,.4);
}

/* ===== FAQ ===== */
.faq-section {
  padding: var(--space-section) 0;
}

.faq-layout {
  display: grid;
  grid-template-columns: 320px 1fr;
  gap: 56px;
  align-items: start;
}

.faq-side {
  position: sticky;
  top: 100px;
}

.faq-side h2 {
  margin-bottom: 14px;
}

.faq-side p {
  font-size: 15px;
  color: var(--text-sub);
  margin-bottom: 24px;
}

.faq-list {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.faq-item {
  background: var(--card);
  border-radius: var(--radius-lg);
  border: 1px solid var(--border);
  box-shadow: var(--shadow);
  overflow: hidden;
  transition: border-color .3s ease, box-shadow .3s ease;
}

.faq-item.active {
  border-color: rgba(79, 70, 229, .3);
  box-shadow: var(--shadow-hover);
}

.faq-q {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  padding: 18px 24px;
  font-size: 16px;
  font-weight: 600;
  color: var(--text);
  text-align: left;
  min-height: 56px;
  transition: color .3s ease;
}

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

.faq-q .faq-icon {
  width: 24px;
  height: 24px;
  border-radius: 50%;
  background: var(--bg-light);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 14px;
  color: var(--primary);
  transition: transform .35s ease, background .3s ease;
  flex-shrink: 0;
  margin-left: 16px;
}

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

.faq-a {
  padding: 0 24px;
  max-height: 0;
  overflow: hidden;
  transition: max-height .35s ease, padding .35s ease;
}

.faq-item.active .faq-a {
  padding: 0 24px 20px;
  max-height: 300px;
}

.faq-a p {
  font-size: 15px;
  color: var(--text-sub);
  line-height: 1.7;
  border-top: 1px solid var(--border);
  padding-top: 16px;
}

/* ===== CTA Subscribe ===== */
.cta-section {
  padding: var(--space-section) 0;
}

.cta-card {
  background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
  border-radius: 24px;
  padding: 64px 48px;
  text-align: center;
  box-shadow: 0 24px 60px rgba(79, 70, 229, .25);
  position: relative;
  overflow: hidden;
}

.cta-card::before {
  content: '';
  position: absolute;
  top: -100px;
  right: -100px;
  width: 260px;
  height: 260px;
  border-radius: 50%;
  background: rgba(255,255,255,.06);
}

.cta-card::after {
  content: '';
  position: absolute;
  bottom: -80px;
  left: -80px;
  width: 200px;
  height: 200px;
  border-radius: 50%;
  background: rgba(255,255,255,.04);
}

.cta-card h2 {
  color: #fff;
  font-size: 30px;
  margin-bottom: 12px;
  position: relative;
  z-index: 1;
}

.cta-card p {
  color: rgba(255,255,255,.85);
  font-size: 16px;
  margin-bottom: 32px;
  position: relative;
  z-index: 1;
}

.cta-form {
  display: flex;
  gap: 12px;
  max-width: 520px;
  margin: 0 auto 20px;
  position: relative;
  z-index: 1;
}

.cta-form input[type="email"] {
  flex: 1;
  height: 52px;
  border-radius: 12px;
  border: 1px solid rgba(255,255,255,.5);
  background: rgba(255,255,255,.95);
  padding: 0 20px;
  font-size: 15px;
  color: var(--text);
  outline: none;
  transition: all .3s ease;
}

.cta-form input[type="email"]:focus {
  border-color: #fff;
  box-shadow: 0 0 0 4px rgba(255,255,255,.15);
}

.cta-form input[type="email"]::placeholder {
  color: var(--text-muted);
}

.cta-form .btn-primary {
  background: var(--text);
  white-space: nowrap;
  height: 52px;
}

.cta-form .btn-primary:hover {
  background: #000;
}

.cta-note {
  font-size: 13px;
  color: rgba(255,255,255,.6);
  margin-bottom: 0;
  position: relative;
  z-index: 1;
}

/* ===== Footer ===== */
.site-footer {
  background: var(--bg-dark);
  color: rgba(255,255,255,.75);
  padding-top: 64px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1.5fr;
  gap: 48px;
  padding-bottom: 48px;
}

.footer-brand .brand {
  margin-bottom: 16px;
}

.footer-brand .brand-text {
  color: #fff;
}

.footer-brand p {
  color: rgba(255,255,255,.55);
  font-size: 14px;
  line-height: 1.7;
  max-width: 320px;
}

.footer-links h4,
.footer-meta h4 {
  color: #fff;
  font-size: 16px;
  font-weight: 600;
  margin-bottom: 18px;
}

.footer-links a {
  display: block;
  color: rgba(255,255,255,.6);
  font-size: 14px;
  padding: 5px 0;
  transition: color .25s ease, padding-left .25s ease;
}

.footer-links a:hover {
  color: var(--primary);
  padding-left: 6px;
}

.footer-meta p {
  color: rgba(255,255,255,.5);
  font-size: 14px;
  line-height: 1.7;
}

.footer-bottom {
  border-top: 1px solid rgba(255,255,255,.1);
  padding: 20px 0;
}

.footer-bottom .container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px;
}

.footer-bottom span {
  font-size: 13px;
  color: rgba(255,255,255,.45);
}

.icp-placeholder {
  margin-left: auto;
}

/* ===== 响应式断点 ===== */
@media (max-width: 1024px) {
  .hero h1 {
    font-size: 40px;
  }
  .hero h1 .h1-sub {
    font-size: 28px;
  }
  .news-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .chips-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .trust-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 24px;
  }
  .about-grid {
    gap: 40px;
  }
}

@media (max-width: 768px) {
  :root {
    --space-section: 64px;
  }

  body {
    font-size: 15px;
  }

  h1 {
    font-size: 32px !important;
  }

  h1 .h1-sub {
    font-size: 24px !important;
  }

  h2 {
    font-size: 24px;
  }

  .header-inner {
    height: 64px;
  }

  .site-header {
    height: 64px;
  }

  .nav-toggle {
    display: flex;
  }

  .header-cta {
    display: none;
  }

  .main-nav {
    position: fixed;
    top: 64px;
    left: 0;
    right: 0;
    background: #fff;
    flex-direction: column;
    align-items: stretch;
    padding: 16px 24px 24px;
    gap: 6px;
    box-shadow: 0 12px 30px rgba(24,24,27,.08);
    transform: translateY(-120%);
    transition: transform .3s ease;
    border-bottom: 1px solid var(--border);
    z-index: 999;
  }

  .main-nav.open {
    transform: translateY(0);
  }

  .nav-link {
    height: 46px;
    justify-content: flex-start;
    padding: 0 18px;
    font-size: 15px;
  }

  .nav-link.active {
    background: var(--bg-light);
    color: var(--primary);
    box-shadow: none;
  }

  .nav-cta {
    display: flex;
    margin-left: 0;
    margin-top: 10px;
    justify-content: center;
    height: 46px;
  }

  .hero {
    padding: 72px 0 56px;
  }

  .hero-stats {
    grid-template-columns: repeat(2, 1fr);
    gap: 14px;
    margin-top: 48px;
  }

  .stat-card {
    padding: 20px 12px;
  }

  .stat-num {
    font-size: 30px;
  }

  .about-grid {
    grid-template-columns: 1fr;
    gap: 48px;
  }

  .about-images {
    padding-right: 0;
  }

  .about-img-main {
    height: 260px;
  }

  .about-img-sub {
    width: 50%;
    height: 150px;
    right: 0;
  }

  .chips-grid {
    grid-template-columns: 1fr;
    gap: 16px;
  }

  .chip-card {
    padding: 24px 20px;
  }

  .news-grid {
    grid-template-columns: 1fr;
    gap: 18px;
  }

  .section-head-row {
    flex-direction: column;
    align-items: flex-start;
  }

  .faq-layout {
    grid-template-columns: 1fr;
    gap: 36px;
  }

  .faq-side {
    position: static;
  }

  .cta-card {
    padding: 48px 20px;
  }

  .cta-form {
    flex-direction: column;
  }

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

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

  .icp-placeholder {
    margin-left: 0;
  }

  .trust-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .trust-num {
    font-size: 32px;
  }
}

@media (max-width: 520px) {
  .hero h1 {
    font-size: 28px !important;
  }

  .hero h1 .h1-sub {
    font-size: 20px !important;
  }

  .hero-sub {
    font-size: 15px;
  }

  .btn-lg {
    height: 46px;
    padding: 0 24px;
    font-size: 15px;
  }

  .hero-stats {
    grid-template-columns: 1fr;
  }

  .stat-card {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 16px;
    text-align: left;
  }

  .stat-num {
    font-size: 28px;
    margin-bottom: 0;
    min-width: 80px;
    font-variant-numeric: tabular-nums;
  }

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

  .trust-badges {
    flex-direction: column;
    align-items: stretch;
    gap: 10px;
  }

  .trust-badges span {
    text-align: center;
  }

  .cta-card h2 {
    font-size: 24px;
  }

  .footer-bottom {
    flex-direction: column;
    gap: 8px;
  }
}

/* roulang page: category1 */
:root {
            --primary: #4F46E5;
            --primary-hover: #4338CA;
            --violet: #7C3AED;
            --gradient: linear-gradient(135deg, #4F46E5 0%, #7C3AED 100%);
            --amber: #F59E0B;
            --emerald: #10B981;
            --bg: #FAFAFA;
            --bg-purple: #F5F3FF;
            --dark: #18181B;
            --text: #18181B;
            --text-sub: #52525B;
            --text-muted: #A1A1AA;
            --border: #E4E4E7;
            --radius-lg: 20px;
            --radius-md: 14px;
            --radius-sm: 10px;
            --shadow: 0 8px 24px rgba(24, 24, 27, .06);
            --shadow-hover: 0 16px 40px rgba(79, 70, 229, .14);
            --container: 1200px;
            --spacing-section: 88px;
            --font-sans: "PingFang SC", "Microsoft YaHei", "HarmonyOS Sans SC", "Helvetica Neue", Arial, sans-serif;
            --font-num: "Inter", "DIN Alternate", "Roboto", sans-serif;
        }
        *,
        *::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);
            background: var(--bg);
            -webkit-font-smoothing: antialiased;
            overflow-x: hidden;
        }
        img {
            max-width: 100%;
            display: block;
        }
        a {
            color: inherit;
            text-decoration: none;
            transition: color .2s ease;
        }
        button {
            font-family: inherit;
            cursor: pointer;
            border: none;
            background: none;
        }
        input {
            font-family: inherit;
            outline: none;
        }
        .container {
            max-width: var(--container);
            margin: 0 auto;
            padding-left: 24px;
            padding-right: 24px;
        }
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            font-size: 15px;
            font-weight: 600;
            line-height: 1;
            padding: 0 24px;
            height: 44px;
            border-radius: var(--radius-sm);
            transition: all .25s ease;
            white-space: nowrap;
        }
        .btn-primary {
            background: var(--gradient);
            color: #fff;
            box-shadow: 0 4px 14px rgba(79, 70, 229, .28);
        }
        .btn-primary:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(79, 70, 229, .36);
            filter: brightness(1.05);
        }
        .btn-primary:active {
            transform: translateY(1px);
        }
        .btn-primary:focus-visible {
            outline: 3px solid rgba(79, 70, 229, .4);
            outline-offset: 2px;
        }
        .btn-outline {
            background: transparent;
            color: var(--text);
            border: 1.5px solid var(--border);
        }
        .btn-outline:hover {
            border-color: var(--primary);
            color: var(--primary);
            background: var(--bg-purple);
            transform: translateY(-1px);
        }
        .btn-outline:focus-visible {
            outline: 3px solid rgba(79, 70, 229, .3);
            outline-offset: 2px;
        }
        .btn-sm {
            height: 38px;
            padding: 0 18px;
            font-size: 14px;
        }
        .section-pad {
            padding: var(--spacing-section) 0;
        }
        .section-head {
            text-align: center;
            margin-bottom: 48px;
        }
        .section-head .sub-label {
            display: inline-block;
            font-size: 13px;
            font-weight: 600;
            color: var(--primary);
            background: var(--bg-purple);
            padding: 6px 18px;
            border-radius: 999px;
            margin-bottom: 12px;
            letter-spacing: .5px;
        }
        .section-head h2 {
            font-size: 30px;
            font-weight: 700;
            line-height: 1.3;
            letter-spacing: -1px;
        }
        .section-head p {
            color: var(--text-sub);
            max-width: 560px;
            margin: 12px auto 0;
            font-size: 15px;
        }
        .site-header {
            position: sticky;
            top: 0;
            z-index: 100;
            background: rgba(255, 255, 255, .97);
            backdrop-filter: blur(12px);
            border-bottom: 1px solid var(--border);
            height: 68px;
            transition: box-shadow .3s ease;
        }
        .site-header.scrolled {
            box-shadow: 0 4px 20px rgba(24, 24, 27, .06);
        }
        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 68px;
            gap: 24px;
        }
        .brand {
            display: flex;
            align-items: center;
            gap: 10px;
            flex-shrink: 0;
        }
        .brand-logo {
            width: 38px;
            height: 38px;
            border-radius: 12px;
            background: var(--gradient);
            display: flex;
            align-items: center;
            justify-content: center;
            font-family: var(--font-num);
            font-size: 18px;
            font-weight: 800;
            color: #fff;
            letter-spacing: -1px;
            box-shadow: 0 4px 12px rgba(79, 70, 229, .3);
        }
        .brand-text {
            font-size: 18px;
            font-weight: 700;
            color: var(--text);
            letter-spacing: .3px;
        }
        .main-nav {
            display: flex;
            align-items: center;
            gap: 4px;
            flex: 1;
            justify-content: center;
        }
        .main-nav .nav-link {
            padding: 8px 16px;
            font-size: 15px;
            font-weight: 500;
            color: var(--text-sub);
            border-radius: 999px;
            transition: all .2s ease;
            white-space: nowrap;
        }
        .main-nav .nav-link:hover {
            background: var(--bg-purple);
            color: var(--primary);
        }
        .main-nav .nav-link.active {
            background: var(--gradient);
            color: #fff;
            font-weight: 600;
            box-shadow: 0 4px 14px rgba(79, 70, 229, .28);
        }
        .main-nav .nav-cta {
            margin-left: 12px;
        }
        .nav-cta {
            display: inline-flex;
        }
        .header-actions {
            display: flex;
            align-items: center;
            gap: 12px;
            flex-shrink: 0;
        }
        .header-cta {
            display: inline-flex;
        }
        .nav-toggle {
            display: none;
            flex-direction: column;
            gap: 5px;
            padding: 8px;
            border-radius: 8px;
            transition: background .2s;
        }
        .nav-toggle span {
            display: block;
            width: 22px;
            height: 2px;
            background: var(--text);
            border-radius: 4px;
            transition: all .3s ease;
        }
        .nav-toggle:hover {
            background: var(--bg-purple);
        }
        .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);
        }
        .page-hero {
            position: relative;
            background: url('/assets/images/backpic/back-1.webp') center center / cover no-repeat;
            padding: 72px 0 96px;
            overflow: hidden;
        }
        .page-hero::before {
            content: "";
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(24, 24, 27, .82) 0%, rgba(79, 70, 229, .65) 60%, rgba(124, 58, 237, .7) 100%);
        }
        .page-hero::after {
            content: "";
            position: absolute;
            width: 480px;
            height: 480px;
            border-radius: 50%;
            background: radial-gradient(circle, rgba(255, 255, 255, .14) 0%, transparent 70%);
            top: -160px;
            right: -100px;
            pointer-events: none;
        }
        .page-hero .container {
            position: relative;
            z-index: 2;
        }
        .hero-content {
            max-width: 720px;
        }
        .hero-chip {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            background: rgba(255, 255, 255, .18);
            border: 1px solid rgba(255, 255, 255, .3);
            color: #fff;
            font-size: 13px;
            font-weight: 600;
            padding: 6px 16px;
            border-radius: 999px;
            backdrop-filter: blur(4px);
            margin-bottom: 20px;
        }
        .hero-chip i {
            font-style: normal;
        }
        .hero-content h1 {
            font-size: 46px;
            font-weight: 800;
            line-height: 1.2;
            color: #fff;
            letter-spacing: -1.5px;
            margin-bottom: 16px;
        }
        .hero-content .hero-subtitle {
            font-size: 16px;
            line-height: 1.8;
            color: rgba(255, 255, 255, .88);
            max-width: 560px;
            margin-bottom: 32px;
        }
        .hero-actions {
            display: flex;
            flex-wrap: wrap;
            gap: 14px;
        }
        .hero-actions .btn-primary {
            box-shadow: 0 6px 20px rgba(255, 255, 255, .18);
        }
        .hero-actions .btn-outline {
            border-color: rgba(255, 255, 255, .6);
            color: #fff;
            background: transparent;
        }
        .hero-actions .btn-outline:hover {
            background: rgba(255, 255, 255, .12);
            border-color: #fff;
            color: #fff;
        }
        .badge-row {
            position: relative;
            z-index: 2;
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 16px;
            margin-top: 56px;
        }
        .stat-card {
            background: rgba(255, 255, 255, .92);
            border-radius: 16px;
            padding: 20px 18px;
            text-align: center;
            box-shadow: 0 8px 32px rgba(0, 0, 0, .15);
            backdrop-filter: blur(8px);
            transition: transform .25s ease, box-shadow .25s ease;
        }
        .stat-card:hover {
            transform: translateY(-4px);
            box-shadow: 0 16px 40px rgba(79, 70, 229, .2);
        }
        .stat-card .num {
            font-family: var(--font-num);
            font-size: 32px;
            font-weight: 800;
            color: var(--primary);
            line-height: 1.2;
            font-variant-numeric: tabular-nums;
        }
        .stat-card .stat-label {
            font-size: 13px;
            color: var(--text-sub);
            margin-top: 4px;
        }
        .news-topics {
            background: var(--bg);
            padding: var(--spacing-section) 0 0;
        }
        .sub-nav-row {
            display: flex;
            flex-wrap: wrap;
            justify-content: center;
            gap: 12px;
            margin-bottom: 48px;
        }
        .topic-chip {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: #fff;
            border: 1px solid var(--border);
            border-radius: 999px;
            padding: 10px 28px;
            font-size: 15px;
            font-weight: 600;
            color: var(--text-sub);
            transition: all .25s ease;
            box-shadow: 0 2px 8px rgba(24, 24, 27, .04);
        }
        .topic-chip i {
            font-style: normal;
            width: 28px;
            height: 28px;
            border-radius: 50%;
            background: var(--bg-purple);
            display: inline-flex;
            align-items: center;
            justify-content: center;
            font-size: 14px;
            color: var(--primary);
            transition: all .25s ease;
        }
        .topic-chip:hover {
            border-color: var(--primary);
            color: var(--primary);
            background: var(--bg-purple);
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(79, 70, 229, .12);
        }
        .latest-news {
            padding: 40px 0 var(--spacing-section);
        }
        .section-bar {
            display: flex;
            align-items: center;
            justify-content: space-between;
            margin-bottom: 32px;
            flex-wrap: wrap;
            gap: 12px;
        }
        .section-bar h2 {
            font-size: 26px;
            font-weight: 700;
            letter-spacing: -1px;
        }
        .link-more {
            font-size: 14px;
            font-weight: 600;
            color: var(--primary);
            display: inline-flex;
            align-items: center;
            gap: 4px;
        }
        .link-more:hover {
            color: var(--primary-hover);
            text-decoration: underline;
        }
        .news-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }
        .news-card {
            background: #fff;
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow);
            transition: transform .3s ease, box-shadow .3s ease;
            display: flex;
            flex-direction: column;
            height: 100%;
        }
        .news-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-hover);
        }
        .news-card .cover {
            position: relative;
            aspect-ratio: 16/10;
            overflow: hidden;
        }
        .news-card .cover img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform .4s ease;
        }
        .news-card:hover .cover img {
            transform: scale(1.04);
        }
        .news-card .card-body {
            padding: 20px;
            display: flex;
            flex-direction: column;
            flex: 1;
        }
        .card-tag {
            display: inline-block;
            align-self: flex-start;
            font-size: 12px;
            font-weight: 600;
            color: var(--primary);
            background: var(--bg-purple);
            padding: 4px 12px;
            border-radius: 999px;
            margin-bottom: 12px;
        }
        .card-tag.amber {
            color: #b45309;
            background: #FEF3C7;
        }
        .card-tag.green {
            color: #047857;
            background: #D1FAE5;
        }
        .news-card .card-title {
            font-size: 17px;
            font-weight: 600;
            line-height: 1.5;
            margin-bottom: 8px;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
            min-height: 50px;
        }
        .news-card .card-desc {
            font-size: 14px;
            color: var(--text-sub);
            line-height: 1.65;
            display: -webkit-box;
            -webkit-line-clamp: 3;
            -webkit-box-orient: vertical;
            overflow: hidden;
            margin-bottom: 16px;
            flex: 1;
        }
        .news-card .card-meta {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding-top: 14px;
            border-top: 1px solid #f4f4f5;
            font-size: 13px;
            color: var(--text-muted);
        }
        .news-card .card-meta .read-more {
            color: var(--primary);
            font-weight: 600;
            font-size: 13px;
            transition: gap .2s ease;
            display: inline-flex;
            align-items: center;
            gap: 2px;
        }
        .news-card .card-meta .read-more:hover {
            gap: 6px;
            text-decoration: underline;
        }
        .value-section {
            background: var(--bg-purple);
            padding: var(--spacing-section) 0;
            position: relative;
            overflow: hidden;
        }
        .value-section::before {
            content: "";
            position: absolute;
            width: 300px;
            height: 300px;
            border-radius: 50%;
            background: radial-gradient(circle, rgba(79, 70, 229, .08), transparent 70%);
            bottom: -80px;
            left: -60px;
        }
        .value-layout {
            display: grid;
            grid-template-columns: 1.1fr 1fr;
            gap: 56px;
            align-items: center;
            position: relative;
            z-index: 1;
        }
        .value-text .sub-label {
            display: inline-block;
            font-size: 13px;
            font-weight: 600;
            color: var(--primary);
            background: #fff;
            padding: 6px 18px;
            border-radius: 999px;
            margin-bottom: 16px;
            box-shadow: 0 2px 8px rgba(79, 70, 229, .08);
        }
        .value-text h2 {
            font-size: 30px;
            font-weight: 700;
            line-height: 1.3;
            letter-spacing: -1px;
            margin-bottom: 16px;
        }
        .value-text>p {
            font-size: 15px;
            color: var(--text-sub);
            line-height: 1.8;
            margin-bottom: 24px;
        }
        .value-list {
            list-style: none;
            display: flex;
            flex-direction: column;
            gap: 20px;
        }
        .value-list li {
            display: flex;
            gap: 16px;
            align-items: flex-start;
            background: #fff;
            padding: 16px 18px;
            border-radius: 14px;
            box-shadow: 0 4px 16px rgba(24, 24, 27, .05);
            transition: transform .25s ease, box-shadow .25s ease;
        }
        .value-list li:hover {
            transform: translateX(4px);
            box-shadow: 0 8px 24px rgba(79, 70, 229, .1);
        }
        .value-list .v-icon {
            width: 40px;
            height: 40px;
            border-radius: 12px;
            background: var(--gradient);
            color: #fff;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 18px;
            flex-shrink: 0;
        }
        .value-list .v-text h4 {
            font-size: 16px;
            font-weight: 600;
            margin-bottom: 4px;
        }
        .value-list .v-text p {
            font-size: 14px;
            color: var(--text-sub);
            line-height: 1.6;
        }
        .value-image {
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow-hover);
            position: relative;
            min-height: 340px;
        }
        .value-image img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            position: absolute;
            inset: 0;
        }
        .process-section {
            padding: var(--spacing-section) 0;
            background: var(--bg);
        }
        .process-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
            margin-top: 48px;
        }
        .process-step {
            background: #fff;
            border-radius: var(--radius-lg);
            padding: 28px 22px;
            box-shadow: var(--shadow);
            text-align: center;
            position: relative;
            transition: transform .25s ease, box-shadow .25s ease;
        }
        .process-step:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-hover);
        }
        .process-step .step-num {
            font-family: var(--font-num);
            font-size: 40px;
            font-weight: 800;
            background: var(--gradient);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            line-height: 1;
        }
        .process-step h4 {
            font-size: 17px;
            font-weight: 600;
            margin-top: 14px;
            margin-bottom: 8px;
        }
        .process-step p {
            font-size: 14px;
            color: var(--text-sub);
            line-height: 1.65;
        }
        .faq-section {
            padding: var(--spacing-section) 0;
            background: #fff;
        }
        .faq-layout {
            display: grid;
            grid-template-columns: 1fr 2.5fr;
            gap: 48px;
            align-items: flex-start;
        }
        .faq-side {
            position: sticky;
            top: 100px;
        }
        .faq-side .sub-label {
            display: inline-block;
            font-size: 13px;
            font-weight: 600;
            color: var(--primary);
            background: var(--bg-purple);
            padding: 6px 18px;
            border-radius: 999px;
            margin-bottom: 16px;
        }
        .faq-side h2 {
            font-size: 28px;
            font-weight: 700;
            line-height: 1.3;
            letter-spacing: -1px;
            margin-bottom: 14px;
        }
        .faq-side p {
            font-size: 15px;
            color: var(--text-sub);
            line-height: 1.7;
        }
        .faq-list {
            display: flex;
            flex-direction: column;
            gap: 14px;
        }
        .faq-item {
            border: 1px solid var(--border);
            border-radius: 16px;
            background: var(--bg);
            overflow: hidden;
            transition: border-color .3s ease, box-shadow .3s ease;
        }
        .faq-item.open {
            border-color: rgba(79, 70, 229, .35);
            box-shadow: 0 8px 24px rgba(79, 70, 229, .08);
            background: #fff;
        }
        .faq-q {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 18px 22px;
            font-size: 16px;
            font-weight: 600;
            cursor: pointer;
            user-select: none;
            transition: color .2s;
        }
        .faq-q:hover {
            color: var(--primary);
        }
        .faq-q .faq-icon {
            width: 24px;
            height: 24px;
            border-radius: 50%;
            background: var(--bg-purple);
            color: var(--primary);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 14px;
            transition: transform .3s ease;
            flex-shrink: 0;
            margin-left: 12px;
        }
        .faq-item.open .faq-q .faq-icon {
            transform: rotate(45deg);
        }
        .faq-a {
            max-height: 0;
            overflow: hidden;
            transition: max-height .35s ease;
        }
        .faq-a-inner {
            padding: 0 22px 18px;
            font-size: 15px;
            color: var(--text-sub);
            line-height: 1.75;
        }
        .cta-section {
            padding: 0 0 var(--spacing-section);
            background: #fff;
        }
        .cta-card {
            background: linear-gradient(135deg, rgba(79, 70, 229, .95), rgba(124, 58, 237, .9)), url('/assets/images/backpic/back-3.webp') center center / cover no-repeat;
            border-radius: 24px;
            padding: 64px 48px;
            text-align: center;
            position: relative;
            overflow: hidden;
            color: #fff;
            box-shadow: 0 20px 48px rgba(79, 70, 229, .3);
        }
        .cta-card::after {
            content: "";
            position: absolute;
            width: 300px;
            height: 300px;
            border-radius: 50%;
            background: radial-gradient(circle, rgba(255, 255, 255, .15), transparent 70%);
            top: -100px;
            right: -60px;
        }
        .cta-card h2 {
            font-size: 30px;
            font-weight: 700;
            position: relative;
            z-index: 1;
            margin-bottom: 12px;
        }
        .cta-card>p {
            font-size: 15px;
            opacity: .88;
            position: relative;
            z-index: 1;
            margin-bottom: 28px;
        }
        .cta-form {
            display: flex;
            gap: 10px;
            max-width: 460px;
            margin: 0 auto 12px;
            position: relative;
            z-index: 1;
            flex-wrap: wrap;
        }
        .cta-form input {
            flex: 1;
            height: 44px;
            border-radius: 10px;
            border: 1px solid rgba(255, 255, 255, .4);
            background: rgba(255, 255, 255, .92);
            padding: 0 16px;
            font-size: 15px;
            color: var(--text);
            min-width: 200px;
            transition: all .25s ease;
        }
        .cta-form input:focus {
            border-color: #fff;
            box-shadow: 0 0 0 4px rgba(255, 255, 255, .22);
            background: #fff;
        }
        .cta-form input::placeholder {
            color: var(--text-muted);
        }
        .cta-form .btn-primary {
            background: var(--dark);
            box-shadow: 0 4px 14px rgba(0, 0, 0, .18);
        }
        .cta-form .btn-primary:hover {
            background: #27272a;
            box-shadow: 0 8px 24px rgba(0, 0, 0, .24);
        }
        .cta-note {
            font-size: 13px;
            opacity: .7;
            position: relative;
            z-index: 1;
        }
        .site-footer {
            background: var(--dark);
            color: #A1A1AA;
            padding-top: 64px;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1.4fr;
            gap: 48px;
            padding-bottom: 48px;
        }
        .footer-brand .brand .brand-text {
            color: #fff;
        }
        .footer-brand .brand .brand-logo {
            background: var(--gradient);
        }
        .footer-brand p {
            font-size: 14px;
            line-height: 1.7;
            margin-top: 16px;
            color: #A1A1AA;
        }
        .footer-links h4,
        .footer-meta h4 {
            font-size: 15px;
            font-weight: 600;
            color: #fff;
            margin-bottom: 16px;
        }
        .footer-links a {
            display: block;
            font-size: 14px;
            color: #A1A1AA;
            padding: 6px 0;
            transition: color .2s, padding-left .2s;
        }
        .footer-links a:hover {
            color: #A78BFA;
            padding-left: 4px;
        }
        .footer-meta p {
            font-size: 14px;
            line-height: 1.7;
            color: #A1A1AA;
        }
        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, .08);
            padding: 20px 0;
        }
        .footer-bottom .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 12px;
            flex-wrap: wrap;
            font-size: 13px;
            color: #71717A;
        }
        .footer-bottom .icp-placeholder {
            font-size: 13px;
        }
        @media (max-width: 1023px) {
            .hero-content h1 {
                font-size: 38px;
            }
            .badge-row {
                grid-template-columns: repeat(2, 1fr);
                gap: 12px;
            }
            .news-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .value-layout {
                gap: 36px;
            }
            .process-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .faq-layout {
                grid-template-columns: 1fr;
            }
            .faq-side {
                position: static;
            }
            .main-nav {
                display: none;
                position: fixed;
                top: 68px;
                left: 0;
                right: 0;
                background: #fff;
                flex-direction: column;
                align-items: stretch;
                padding: 20px 24px 28px;
                gap: 8px;
                box-shadow: 0 20px 40px rgba(0, 0, 0, .1);
                border-bottom: 1px solid var(--border);
                z-index: 99;
            }
            .main-nav.open {
                display: flex;
            }
            .main-nav .nav-link {
                padding: 14px 20px;
                border-radius: 12px;
                text-align: center;
            }
            .main-nav .nav-cta {
                margin: 12px 0 0;
                justify-content: center;
            }
            .nav-toggle {
                display: flex;
            }
            .header-cta {
                display: none;
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 36px;
            }
            .footer-meta {
                grid-column: 1 / -1;
            }
        }
        @media (max-width: 767px) {
            :root {
                --spacing-section: 56px;
            }
            .section-pad {
                padding: var(--spacing-section) 0;
            }
            .hero-content h1 {
                font-size: 28px;
            }
            .hero-content .hero-subtitle {
                font-size: 15px;
            }
            .page-hero {
                padding: 48px 0 64px;
            }
            .badge-row {
                grid-template-columns: 1fr 1fr;
                gap: 10px;
                margin-top: 36px;
            }
            .stat-card {
                padding: 14px 10px;
            }
            .stat-card .num {
                font-size: 24px;
            }
            .stat-card .stat-label {
                font-size: 12px;
            }
            .sub-nav-row {
                gap: 8px;
            }
            .topic-chip {
                padding: 8px 18px;
                font-size: 14px;
            }
            .news-grid {
                grid-template-columns: 1fr;
                gap: 16px;
            }
            .section-bar h2 {
                font-size: 22px;
            }
            .value-layout {
                grid-template-columns: 1fr;
                gap: 28px;
            }
            .value-image {
                min-height: 240px;
                position: static;
                height: 240px;
            }
            .value-image img {
                position: static;
            }
            .value-list li {
                padding: 14px;
            }
            .process-grid {
                grid-template-columns: 1fr;
                gap: 16px;
            }
            .faq-q {
                padding: 16px;
                font-size: 15px;
            }
            .faq-a-inner {
                padding: 0 16px 14px;
            }
            .cta-card {
                padding: 40px 20px;
            }
            .cta-card h2 {
                font-size: 24px;
            }
            .cta-form {
                flex-direction: column;
            }
            .cta-form input {
                width: 100%;
                min-width: 0;
            }
            .cta-form .btn {
                width: 100%;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 28px;
            }
            .footer-bottom .container {
                flex-direction: column;
                text-align: center;
            }
        }
        @media (max-width: 480px) {
            .badge-row {
                grid-template-columns: 1fr;
            }
            .stat-card {
                padding: 12px;
            }
            .hero-actions .btn {
                width: 100%;
            }
        }

/* roulang page: article */
:root {
  --primary: #4F46E5;
  --primary-hover: #4338CA;
  --purple: #7C3AED;
  --accent: #F59E0B;
  --success: #10B981;
  --bg: #FAFAFA;
  --bg-purple: #F5F3FF;
  --dark: #18181B;
  --text: #18181B;
  --text-secondary: #52525B;
  --text-muted: #A1A1AA;
  --border: #E4E4E7;
  --radius-lg: 20px;
  --radius-md: 12px;
  --radius-sm: 10px;
  --radius-chip: 999px;
  --shadow-sm: 0 8px 24px rgba(24,24,27,.06);
  --shadow-lg: 0 16px 40px rgba(79,70,229,.14);
  --container: 1200px;
  --header-h: 68px;
  --gradient: linear-gradient(135deg, #4F46E5, #7C3AED);
  --font-sans: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", "HarmonyOS Sans SC", "Segoe UI", Roboto, sans-serif;
  --font-mono: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-sans);
  background: var(--bg);
  color: var(--text);
  line-height: 1.7;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
}

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

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

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

.container {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 24px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  height: 44px;
  padding: 0 24px;
  border-radius: var(--radius-sm);
  font-size: 15px;
  font-weight: 600;
  border: 1px solid transparent;
  cursor: pointer;
  transition: all .25s ease;
  white-space: nowrap;
  text-decoration: none;
  line-height: 1;
}

.btn:focus-visible {
  outline: 3px solid rgba(79, 70, 229, .35);
  outline-offset: 2px;
}

.btn-primary {
  background: var(--gradient);
  color: #fff;
  box-shadow: 0 2px 8px rgba(79, 70, 229, .25);
}

.btn-primary:hover {
  background: linear-gradient(135deg, #4338CA, #6D28D9);
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(79, 70, 229, .3);
}

.btn-primary:active {
  transform: translateY(0);
  box-shadow: 0 2px 8px rgba(79, 70, 229, .25);
}

.btn-outline {
  background: #fff;
  border-color: var(--border);
  color: var(--text);
}

.btn-outline:hover {
  border-color: var(--primary);
  color: var(--primary);
  background: var(--bg-purple);
  transform: translateY(-2px);
}

.btn-ghost {
  background: transparent;
  border-color: transparent;
  color: var(--text-secondary);
}

.btn-ghost:hover {
  background: var(--bg-purple);
  color: var(--primary);
}

.btn-sm {
  height: 36px;
  padding: 0 18px;
  font-size: 14px;
}

/* ===== Header ===== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  height: var(--header-h);
  background: rgba(255, 255, 255, .97);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
  transition: box-shadow .3s ease;
}

.site-header.scrolled {
  box-shadow: 0 4px 20px rgba(24, 24, 27, .06);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: var(--header-h);
  gap: 24px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
}

.brand-logo {
  width: 40px;
  height: 40px;
  border-radius: 10px;
  background: var(--gradient);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 800;
  font-size: 15px;
  letter-spacing: .5px;
  box-shadow: 0 4px 12px rgba(79, 70, 229, .3);
}

.brand-text {
  font-size: 20px;
  font-weight: 700;
  color: var(--text);
  letter-spacing: .5px;
}

.main-nav {
  display: flex;
  align-items: center;
  gap: 4px;
  flex: 1;
  justify-content: center;
}

.nav-link {
  display: inline-flex;
  align-items: center;
  padding: 8px 18px;
  border-radius: var(--radius-chip);
  color: var(--text-secondary);
  font-size: 15px;
  font-weight: 500;
  transition: all .25s ease;
  line-height: 1.2;
}

.nav-link:hover {
  color: var(--primary);
  background: var(--bg-purple);
}

.nav-link.active {
  background: var(--gradient);
  color: #fff;
  font-weight: 600;
  box-shadow: 0 4px 14px rgba(79, 70, 229, .25);
}

.main-nav .nav-cta {
  display: none;
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-shrink: 0;
}

.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 42px;
  height: 42px;
  background: transparent;
  border: 1px solid var(--border);
  border-radius: 10px;
  cursor: pointer;
  padding: 0 10px;
  transition: all .3s ease;
}

.nav-toggle:hover {
  border-color: var(--primary);
  background: var(--bg-purple);
}

.nav-toggle span {
  display: block;
  height: 2px;
  background: var(--text);
  border-radius: 2px;
  transition: all .3s ease;
}

.nav-toggle.open span:nth-child(1) {
  transform: rotate(45deg) translate(5px, 5px);
}

.nav-toggle.open span:nth-child(2) {
  opacity: 0;
}

.nav-toggle.open span:nth-child(3) {
  transform: rotate(-45deg) translate(5px, -5px);
}

/* ===== 面包屑 ===== */
.breadcrumb-bar {
  padding: 14px 0;
  background: var(--bg-purple);
  border-bottom: 1px solid var(--border);
  font-size: 13px;
  color: var(--text-muted);
}

.breadcrumb-inner {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
}

.breadcrumb-inner a {
  color: var(--text-secondary);
  transition: color .2s;
}

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

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

.breadcrumb-current {
  color: var(--text);
  font-weight: 500;
  max-width: 420px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

/* ===== 文章头部 ===== */
.article-header {
  position: relative;
  background-image: url('/assets/images/backpic/back-1.webp');
  background-size: cover;
  background-position: center;
  padding: 72px 0 56px;
}

.article-header::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(245, 243, 255, .92), rgba(250, 250, 250, .96));
}

.article-header-content {
  position: relative;
  z-index: 1;
  max-width: 860px;
  margin: 0 auto;
  text-align: center;
}

.article-category {
  display: inline-flex;
  align-items: center;
  padding: 6px 16px;
  border-radius: var(--radius-chip);
  background: rgba(79, 70, 229, .12);
  color: var(--primary);
  font-size: 13px;
  font-weight: 600;
  margin-bottom: 18px;
  letter-spacing: .3px;
}

.article-header h1 {
  font-size: 40px;
  font-weight: 700;
  line-height: 1.25;
  color: var(--text);
  margin-bottom: 18px;
  letter-spacing: -.5px;
}

.article-meta {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 16px;
  font-size: 14px;
  color: var(--text-secondary);
  flex-wrap: wrap;
}

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

.meta-dot {
  width: 4px;
  height: 4px;
  border-radius: 50%;
  background: var(--text-muted);
  display: inline-block;
}

/* ===== 正文阅读区 ===== */
.article-content {
  padding: 48px 0 24px;
}

.article-body {
  max-width: 760px;
  margin: 0 auto;
  background: #fff;
  padding: 48px 56px;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  font-size: 16px;
  line-height: 1.8;
  color: var(--text);
}

.article-body h2 {
  font-size: 26px;
  font-weight: 700;
  margin: 36px 0 16px;
  padding-bottom: 10px;
  border-bottom: 2px solid var(--bg-purple);
  color: var(--text);
}

.article-body h3 {
  font-size: 20px;
  font-weight: 600;
  margin: 28px 0 12px;
  color: var(--text);
}

.article-body p {
  margin-bottom: 20px;
  color: var(--text-secondary);
}

.article-body a {
  color: var(--primary);
  border-bottom: 1px solid rgba(79, 70, 229, .3);
  transition: border-color .2s;
}

.article-body a:hover {
  border-bottom-color: var(--primary);
}

.article-body blockquote {
  margin: 24px 0;
  padding: 16px 24px;
  border-left: 4px solid var(--primary);
  background: var(--bg-purple);
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
  color: var(--text-secondary);
  font-style: normal;
}

.article-body ul,
.article-body ol {
  margin: 16px 0 20px;
  padding-left: 24px;
  color: var(--text-secondary);
}

.article-body ul li,
.article-body ol li {
  margin-bottom: 8px;
}

.article-body ul li::marker {
  color: var(--primary);
}

.article-body ol li::marker {
  color: var(--primary);
  font-weight: 600;
}

.article-body pre {
  background: #18181B;
  color: #E4E4E7;
  padding: 20px 24px;
  border-radius: var(--radius-md);
  overflow-x: auto;
  font-size: 14px;
  line-height: 1.6;
  margin: 24px 0;
  font-family: var(--font-mono);
}

.article-body code {
  background: var(--bg-purple);
  color: var(--primary);
  padding: 2px 6px;
  border-radius: 4px;
  font-size: 14px;
  font-family: var(--font-mono);
}

.article-body pre code {
  background: transparent;
  color: inherit;
  padding: 0;
  border-radius: 0;
}

.article-body img {
  max-width: 100%;
  border-radius: var(--radius-md);
  margin: 24px auto;
  height: auto;
  box-shadow: var(--shadow-sm);
}

.article-body table {
  width: 100%;
  border-collapse: collapse;
  margin: 24px 0;
  font-size: 14px;
  display: block;
  overflow-x: auto;
  white-space: nowrap;
}

.article-body th,
.article-body td {
  border: 1px solid var(--border);
  padding: 12px 16px;
  text-align: left;
}

.article-body th {
  background: var(--bg-purple);
  font-weight: 600;
  color: var(--text);
}

.article-body tr:nth-child(even) td {
  background: #FAFAFA;
}

.article-body hr {
  border: none;
  border-top: 1px solid var(--border);
  margin: 32px 0;
}

/* ===== 文末标签 ===== */
.article-tags {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
  margin-top: 32px;
  padding-top: 24px;
  border-top: 1px solid var(--border);
}

.tag-chip {
  display: inline-flex;
  align-items: center;
  padding: 6px 14px;
  border-radius: var(--radius-chip);
  background: var(--bg-purple);
  color: var(--primary);
  font-size: 13px;
  font-weight: 500;
  transition: all .25s ease;
  cursor: default;
}

.tag-chip:hover {
  background: rgba(79, 70, 229, .18);
  transform: translateY(-1px);
}

/* ===== 返回入口 ===== */
.article-actions {
  max-width: 760px;
  margin: 32px auto 0;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 16px;
  flex-wrap: wrap;
}

/* ===== 空态 ===== */
.article-empty {
  padding: 100px 0;
  text-align: center;
}

.article-empty-inner {
  max-width: 480px;
  margin: 0 auto;
}

.article-empty h1 {
  font-size: 32px;
  font-weight: 700;
  margin-bottom: 12px;
}

.article-empty p {
  color: var(--text-secondary);
  margin-bottom: 28px;
  font-size: 16px;
}

/* ===== 相关推荐 ===== */
.related-section {
  padding: 64px 0 24px;
}

.section-title-wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 32px;
}

.section-title {
  font-size: 28px;
  font-weight: 700;
  color: var(--text);
  position: relative;
  padding-left: 16px;
}

.section-title::before {
  content: '';
  position: absolute;
  left: 0;
  top: 50%;
  transform: translateY(-50%);
  width: 5px;
  height: 24px;
  border-radius: 4px;
  background: var(--gradient);
}

.section-link {
  font-size: 14px;
  color: var(--text-secondary);
  display: inline-flex;
  align-items: center;
  gap: 4px;
  transition: color .25s;
}

.section-link:hover {
  color: var(--primary);
}

.related-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.related-card {
  background: #fff;
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  transition: all .3s ease;
  display: block;
}

.related-card:hover {
  box-shadow: var(--shadow-lg);
  transform: translateY(-4px);
}

.related-card img {
  width: 100%;
  aspect-ratio: 16 / 10;
  object-fit: cover;
}

.related-card-body {
  padding: 20px 24px 24px;
}

.card-tag {
  display: inline-flex;
  align-items: center;
  padding: 4px 12px;
  border-radius: var(--radius-chip);
  background: var(--bg-purple);
  color: var(--primary);
  font-size: 12px;
  font-weight: 600;
  margin-bottom: 12px;
}

.related-card h3 {
  font-size: 18px;
  font-weight: 600;
  line-height: 1.4;
  margin-bottom: 8px;
  color: var(--text);
  transition: color .25s;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.related-card:hover h3 {
  color: var(--primary);
}

.related-card p {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.6;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

/* ===== CTA区 ===== */
.cta-section {
  padding: 64px 0 80px;
}

.cta-card {
  background: var(--gradient);
  border-radius: 24px;
  padding: 56px 48px;
  text-align: center;
  color: #fff;
  position: relative;
  overflow: hidden;
}

.cta-card::before {
  content: '';
  position: absolute;
  top: -40px;
  right: -40px;
  width: 200px;
  height: 200px;
  border-radius: 50%;
  background: rgba(255, 255, 255, .08);
}

.cta-card::after {
  content: '';
  position: absolute;
  bottom: -60px;
  left: -60px;
  width: 180px;
  height: 180px;
  border-radius: 50%;
  background: rgba(255, 255, 255, .06);
}

.cta-card h2 {
  font-size: 30px;
  font-weight: 700;
  margin-bottom: 12px;
  position: relative;
  z-index: 1;
}

.cta-card p {
  font-size: 16px;
  opacity: .9;
  margin-bottom: 28px;
  position: relative;
  z-index: 1;
}

.cta-card .btn {
  position: relative;
  z-index: 1;
  background: #fff;
  color: var(--primary);
  box-shadow: 0 8px 24px rgba(0, 0, 0, .15);
}

.cta-card .btn:hover {
  background: var(--bg-purple);
  color: var(--primary-hover);
  box-shadow: 0 12px 32px rgba(0, 0, 0, .2);
}

/* ===== Footer ===== */
.site-footer {
  background: var(--dark);
  color: #A1A1AA;
  padding-top: 56px;
  font-size: 14px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1.6fr;
  gap: 40px;
  padding-bottom: 40px;
}

.footer-brand .brand {
  margin-bottom: 16px;
}

.footer-brand .brand-text {
  color: #fff;
}

.footer-brand p {
  color: #A1A1AA;
  line-height: 1.7;
  max-width: 340px;
}

.footer-links h4,
.footer-meta h4 {
  color: #fff;
  font-size: 16px;
  font-weight: 600;
  margin-bottom: 16px;
}

.footer-links a {
  display: block;
  color: #A1A1AA;
  padding: 5px 0;
  transition: color .25s;
}

.footer-links a:hover {
  color: #fff;
  text-decoration: underline;
  text-underline-offset: 4px;
}

.footer-meta p {
  line-height: 1.7;
  color: #A1A1AA;
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, .08);
  padding: 20px 0;
}

.footer-bottom .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
}

.footer-bottom span {
  color: #A1A1AA;
  font-size: 13px;
}

.icp-placeholder {
  color: #71717A;
}

/* ===== 响应式 ===== */
@media (max-width: 1023px) {
  .related-grid {
    grid-template-columns: repeat(2, 1fr);
  }

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

  .article-header h1 {
    font-size: 34px;
  }
}

@media (max-width: 767px) {
  .main-nav {
    position: fixed;
    top: var(--header-h);
    left: 16px;
    right: 16px;
    background: #fff;
    flex-direction: column;
    align-items: stretch;
    padding: 16px;
    border-radius: 16px;
    box-shadow: var(--shadow-lg);
    display: none;
    gap: 4px;
    z-index: 99;
  }

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

  .main-nav .nav-link {
    padding: 12px 16px;
    border-radius: 10px;
    font-size: 15px;
  }

  .main-nav .nav-cta {
    display: flex;
    margin-top: 8px;
  }

  .header-actions .header-cta {
    display: none;
  }

  .nav-toggle {
    display: flex;
  }

  .article-header {
    padding: 48px 0 40px;
  }

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

  .article-body {
    padding: 28px 20px;
    border-radius: 16px;
  }

  .article-body h2 {
    font-size: 22px;
  }

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

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

  .cta-card h2 {
    font-size: 24px;
  }

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

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

@media (max-width: 520px) {
  .brand-text {
    font-size: 17px;
  }

  .brand-logo {
    width: 36px;
    height: 36px;
    font-size: 13px;
  }

  .container {
    padding: 0 16px;
  }

  .article-meta {
    gap: 10px;
    font-size: 13px;
  }

  .section-title {
    font-size: 24px;
  }

  .article-actions {
    flex-direction: column;
    width: 100%;
  }

  .article-actions .btn {
    width: 100%;
  }
}

/* roulang page: category3 */
:root {
            --primary: #4F46E5;
            --primary-dark: #4338CA;
            --secondary: #7C3AED;
            --accent: #F59E0B;
            --success: #10B981;
            --bg: #FAFAFA;
            --bg-purple: #F5F3FF;
            --dark: #18181B;
            --text: #18181B;
            --text-sub: #52525B;
            --text-muted: #A1A1AA;
            --border: #E4E4E7;
            --radius-lg: 20px;
            --radius-md: 14px;
            --radius-sm: 10px;
            --radius-pill: 999px;
            --shadow: 0 8px 24px rgba(24, 24, 27, 0.06);
            --shadow-hover: 0 16px 40px rgba(79, 70, 229, 0.14);
            --transition: all 0.3s ease;
            --font-family: 'PingFang SC', 'Microsoft YaHei', 'HarmonyOS Sans SC', -apple-system, BlinkMacSystemFont, sans-serif;
        }

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

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: var(--font-family);
            background-color: var(--bg);
            color: var(--text);
            line-height: 1.7;
            font-size: 16px;
            -webkit-font-smoothing: antialiased;
        }

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

        a {
            text-decoration: none;
            color: inherit;
            transition: var(--transition);
        }

        button {
            font-family: inherit;
            border: none;
            cursor: pointer;
            background: none;
        }

        input {
            font-family: inherit;
            outline: none;
            border: none;
        }

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

        /* ===== Header ===== */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 100;
            background: rgba(255, 255, 255, 0.97);
            backdrop-filter: blur(12px);
            border-bottom: 1px solid rgba(228, 228, 231, 0.8);
            height: 72px;
            display: flex;
            align-items: center;
            transition: var(--transition);
        }

        .site-header.scrolled {
            box-shadow: 0 4px 20px rgba(24, 24, 27, 0.06);
        }

        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            width: 100%;
        }

        .brand {
            display: flex;
            align-items: center;
            gap: 10px;
            flex-shrink: 0;
        }

        .brand-logo {
            width: 40px;
            height: 40px;
            border-radius: 12px;
            background: linear-gradient(135deg, var(--primary), var(--secondary));
            color: #fff;
            font-size: 16px;
            font-weight: 700;
            display: flex;
            align-items: center;
            justify-content: center;
            letter-spacing: -0.5px;
        }

        .brand-text {
            font-size: 20px;
            font-weight: 700;
            color: var(--text);
            letter-spacing: 0.5px;
        }

        .main-nav {
            display: flex;
            align-items: center;
            gap: 4px;
        }

        .nav-link {
            padding: 8px 18px;
            border-radius: var(--radius-pill);
            font-size: 15px;
            font-weight: 500;
            color: var(--text-sub);
            transition: var(--transition);
        }

        .nav-link:hover {
            background: var(--bg-purple);
            color: var(--primary);
        }

        .nav-link.active {
            background: linear-gradient(135deg, var(--primary), var(--secondary));
            color: #fff;
            font-weight: 500;
            box-shadow: 0 4px 14px rgba(79, 70, 229, 0.3);
        }

        .nav-cta {
            margin-left: 12px;
        }

        .header-actions {
            display: flex;
            align-items: center;
            gap: 12px;
        }

        .header-cta {
            display: inline-flex;
        }

        .nav-toggle {
            display: none;
            flex-direction: column;
            justify-content: center;
            gap: 6px;
            width: 42px;
            height: 42px;
            border-radius: var(--radius-sm);
            padding: 0 10px;
            background: var(--bg-purple);
        }

        .nav-toggle span {
            display: block;
            height: 2px;
            width: 100%;
            background: var(--primary);
            border-radius: 2px;
            transition: var(--transition);
        }

        .nav-toggle.active span:nth-child(1) {
            transform: translateY(8px) rotate(45deg);
        }

        .nav-toggle.active span:nth-child(2) {
            opacity: 0;
        }

        .nav-toggle.active span:nth-child(3) {
            transform: translateY(-8px) rotate(-45deg);
        }

        /* ===== Buttons ===== */
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            padding: 12px 28px;
            border-radius: var(--radius-sm);
            font-size: 15px;
            font-weight: 600;
            line-height: 1.4;
            transition: var(--transition);
            cursor: pointer;
            border: none;
        }

        .btn:focus-visible {
            outline: 3px solid rgba(79, 70, 229, 0.3);
            outline-offset: 2px;
        }

        .btn-primary {
            background: linear-gradient(135deg, var(--primary), var(--secondary));
            color: #fff;
            box-shadow: 0 4px 14px rgba(79, 70, 229, 0.25);
        }

        .btn-primary:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(79, 70, 229, 0.35);
            filter: brightness(1.05);
        }

        .btn-primary:active {
            transform: translateY(1px);
        }

        .btn-outline {
            background: #fff;
            color: var(--primary);
            border: 1.5px solid var(--border);
        }

        .btn-outline:hover {
            border-color: var(--primary);
            background: var(--bg-purple);
            transform: translateY(-2px);
            box-shadow: 0 8px 20px rgba(79, 70, 229, 0.1);
        }

        .btn-outline:active {
            transform: translateY(1px);
        }

        .btn-sm {
            padding: 8px 20px;
            font-size: 14px;
        }

        /* ===== Hero ===== */
        .page-hero {
            position: relative;
            padding: 72px 0 72px;
            background: linear-gradient(135deg, rgba(79, 70, 229, 0.06), rgba(124, 58, 237, 0.04)), url('/assets/images/backpic/back-3.webp') center/cover no-repeat;
            background-blend-mode: overlay;
        }

        .page-hero::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background: linear-gradient(180deg, rgba(255, 255, 255, 0.92) 0%, rgba(255, 255, 255, 0.82) 100%);
        }

        .page-hero .container {
            position: relative;
            z-index: 1;
            display: flex;
            flex-direction: column;
            align-items: center;
            text-align: center;
        }

        .breadcrumb {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 13px;
            color: var(--text-muted);
            margin-bottom: 20px;
        }

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

        .breadcrumb .sep {
            color: #ccc;
        }

        .page-hero h1 {
            font-size: 44px;
            font-weight: 700;
            line-height: 1.2;
            margin-bottom: 16px;
            background: linear-gradient(135deg, var(--text), var(--primary));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }

        .page-hero .hero-desc {
            max-width: 660px;
            font-size: 17px;
            color: var(--text-sub);
            line-height: 1.8;
            margin-bottom: 32px;
        }

        .hero-ctas {
            display: flex;
            gap: 16px;
            flex-wrap: wrap;
            justify-content: center;
        }

        .hero-badges {
            display: flex;
            gap: 16px;
            margin-top: 40px;
            flex-wrap: wrap;
            justify-content: center;
        }

        .hero-badge {
            background: rgba(255, 255, 255, 0.9);
            border: 1px solid var(--border);
            border-radius: var(--radius-md);
            padding: 16px 24px;
            text-align: center;
            box-shadow: var(--shadow);
            min-width: 140px;
        }

        .hero-badge .num {
            font-size: 32px;
            font-weight: 700;
            color: var(--primary);
            font-variant-numeric: tabular-nums;
            line-height: 1.2;
            display: block;
        }

        .hero-badge .label {
            font-size: 13px;
            color: var(--text-sub);
            margin-top: 4px;
            display: block;
        }

        /* ===== FAQ Section ===== */
        .faq-section {
            padding: 96px 0 64px;
        }

        .section-header {
            text-align: center;
            margin-bottom: 48px;
        }

        .section-tag {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 6px 16px;
            background: var(--bg-purple);
            color: var(--primary);
            border-radius: var(--radius-pill);
            font-size: 13px;
            font-weight: 600;
            margin-bottom: 16px;
        }

        .section-header h2 {
            font-size: 32px;
            font-weight: 700;
            line-height: 1.3;
            margin-bottom: 12px;
        }

        .section-header p {
            font-size: 16px;
            color: var(--text-sub);
            max-width: 560px;
            margin: 0 auto;
        }

        .faq-layout {
            display: grid;
            grid-template-columns: 1fr 2fr;
            gap: 40px;
            align-items: start;
        }

        .faq-side {
            position: sticky;
            top: 96px;
            display: flex;
            flex-direction: column;
            gap: 16px;
        }

        .faq-side-card {
            background: #fff;
            border-radius: var(--radius-lg);
            padding: 28px;
            border: 1px solid var(--border);
            box-shadow: var(--shadow);
        }

        .faq-side-card h3 {
            font-size: 18px;
            font-weight: 600;
            margin-bottom: 12px;
            color: var(--text);
        }

        .faq-side-card p {
            font-size: 14px;
            color: var(--text-sub);
            margin-bottom: 16px;
            line-height: 1.7;
        }

        .faq-side-card .btn {
            width: 100%;
        }

        .faq-list {
            display: flex;
            flex-direction: column;
            gap: 16px;
        }

        .faq-item {
            background: #fff;
            border-radius: var(--radius-lg);
            border: 1px solid var(--border);
            box-shadow: var(--shadow);
            overflow: hidden;
            transition: var(--transition);
        }

        .faq-item:hover {
            box-shadow: var(--shadow-hover);
            border-color: rgba(79, 70, 229, 0.3);
        }

        .faq-item.open {
            border-color: rgba(79, 70, 229, 0.4);
            box-shadow: var(--shadow-hover);
        }

        .faq-question {
            width: 100%;
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 20px 24px;
            font-size: 17px;
            font-weight: 600;
            color: var(--text);
            text-align: left;
            background: transparent;
            transition: var(--transition);
            line-height: 1.5;
        }

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

        .faq-icon {
            flex-shrink: 0;
            width: 28px;
            height: 28px;
            border-radius: 50%;
            background: var(--bg-purple);
            color: var(--primary);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 18px;
            font-weight: 400;
            transition: var(--transition);
            margin-left: 16px;
        }

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

        .faq-answer {
            display: none;
            padding: 0 24px 24px;
            font-size: 15px;
            color: var(--text-sub);
            line-height: 1.8;
        }

        .faq-item.open .faq-answer {
            display: block;
            animation: fadeIn 0.3s ease;
        }

        @keyframes fadeIn {
            from {
                opacity: 0;
                transform: translateY(-8px);
            }
            to {
                opacity: 1;
                transform: translateY(0);
            }
        }

        /* ===== CTA Section ===== */
        .cta-section {
            padding: 24px 0 96px;
        }

        .cta-card {
            background: linear-gradient(135deg, var(--primary), var(--secondary));
            border-radius: 24px;
            padding: 56px 48px;
            text-align: center;
            position: relative;
            overflow: hidden;
        }

        .cta-card::before {
            content: '';
            position: absolute;
            top: -50%;
            right: -20%;
            width: 300px;
            height: 300px;
            background: rgba(255, 255, 255, 0.08);
            border-radius: 50%;
        }

        .cta-card::after {
            content: '';
            position: absolute;
            bottom: -60%;
            left: -10%;
            width: 200px;
            height: 200px;
            background: rgba(255, 255, 255, 0.05);
            border-radius: 50%;
        }

        .cta-card h2 {
            font-size: 28px;
            font-weight: 700;
            color: #fff;
            margin-bottom: 12px;
            position: relative;
            z-index: 1;
        }

        .cta-card p {
            font-size: 16px;
            color: rgba(255, 255, 255, 0.85);
            max-width: 520px;
            margin: 0 auto 28px;
            position: relative;
            z-index: 1;
            line-height: 1.7;
        }

        .cta-card .btn-white {
            background: #fff;
            color: var(--primary);
            position: relative;
            z-index: 1;
            font-weight: 600;
        }

        .cta-card .btn-white:hover {
            transform: translateY(-2px);
            box-shadow: 0 12px 32px rgba(0, 0, 0, 0.15);
        }

        /* ===== Contact Section ===== */
        .contact-section {
            padding: 0 0 96px;
        }

        .contact-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }

        .contact-card {
            background: #fff;
            border-radius: var(--radius-lg);
            padding: 32px;
            border: 1px solid var(--border);
            box-shadow: var(--shadow);
            text-align: center;
            transition: var(--transition);
        }

        .contact-card:hover {
            box-shadow: var(--shadow-hover);
            transform: translateY(-4px);
        }

        .contact-icon {
            width: 52px;
            height: 52px;
            border-radius: 14px;
            background: var(--bg-purple);
            color: var(--primary);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 22px;
            margin: 0 auto 16px;
        }

        .contact-card h3 {
            font-size: 17px;
            font-weight: 600;
            margin-bottom: 8px;
        }

        .contact-card p {
            font-size: 14px;
            color: var(--text-sub);
            line-height: 1.6;
            margin-bottom: 12px;
        }

        .contact-card a {
            color: var(--primary);
            font-size: 14px;
            font-weight: 500;
        }

        .contact-card a:hover {
            text-decoration: underline;
        }

        /* ===== Footer ===== */
        .site-footer {
            background: #fff;
            border-top: 1px solid var(--border);
            padding-top: 56px;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1.5fr;
            gap: 48px;
            padding-bottom: 40px;
        }

        .footer-brand .brand {
            margin-bottom: 16px;
        }

        .footer-brand p {
            font-size: 14px;
            color: var(--text-sub);
            line-height: 1.7;
            max-width: 280px;
        }

        .footer-links h4,
        .footer-meta h4 {
            font-size: 16px;
            font-weight: 600;
            margin-bottom: 16px;
            color: var(--text);
        }

        .footer-links a {
            display: block;
            padding: 5px 0;
            font-size: 14px;
            color: var(--text-sub);
            transition: var(--transition);
        }

        .footer-links a:hover {
            color: var(--primary);
            text-decoration: underline;
        }

        .footer-meta p {
            font-size: 13px;
            color: var(--text-muted);
            line-height: 1.6;
        }

        .footer-bottom {
            background: var(--bg);
            border-top: 1px solid var(--border);
            padding: 20px 0;
        }

        .footer-bottom .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            font-size: 13px;
            color: var(--text-muted);
        }

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

        .icp-placeholder {
            color: var(--text-muted);
        }

        /* ===== Responsive ===== */
        @media (max-width: 1024px) {
            .faq-layout {
                grid-template-columns: 1fr;
            }

            .faq-side {
                position: static;
                order: 2;
            }

            .faq-list {
                order: 1;
            }

            .contact-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }

        @media (max-width: 767px) {
            .site-header {
                height: 64px;
            }

            .main-nav {
                position: fixed;
                top: 64px;
                left: 0;
                right: 0;
                background: #fff;
                flex-direction: column;
                align-items: stretch;
                padding: 16px 24px;
                box-shadow: 0 20px 40px rgba(24, 24, 27, 0.1);
                border-bottom: 1px solid var(--border);
                transform: translateY(-120%);
                transition: transform 0.35s ease;
                z-index: 99;
                border-radius: 0 0 20px 20px;
            }

            .main-nav.open {
                transform: translateY(0);
            }

            .nav-link {
                padding: 14px 16px;
                border-radius: var(--radius-sm);
                font-size: 16px;
            }

            .nav-link:hover {
                background: var(--bg-purple);
            }

            .nav-cta {
                margin: 12px 0 0;
                width: 100%;
                justify-content: center;
            }

            .header-cta {
                display: none;
            }

            .nav-toggle {
                display: flex;
            }

            .page-hero {
                padding: 56px 0 56px;
            }

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

            .page-hero .hero-desc {
                font-size: 15px;
            }

            .hero-ctas {
                flex-direction: column;
                width: 100%;
            }

            .hero-ctas .btn {
                width: 100%;
            }

            .hero-badges {
                gap: 12px;
            }

            .hero-badge {
                min-width: calc(50% - 6px);
                padding: 14px 16px;
            }

            .hero-badge .num {
                font-size: 28px;
            }

            .faq-section {
                padding: 64px 0 48px;
            }

            .section-header h2 {
                font-size: 26px;
            }

            .faq-question {
                font-size: 15px;
                padding: 18px 18px;
            }

            .faq-answer {
                padding: 0 18px 18px;
                font-size: 14px;
            }

            .cta-section {
                padding: 16px 0 64px;
            }

            .cta-card {
                padding: 40px 24px;
                border-radius: 20px;
            }

            .cta-card h2 {
                font-size: 24px;
            }

            .cta-card p {
                font-size: 14px;
            }

            .cta-card .btn {
                width: 100%;
            }

            .contact-grid {
                grid-template-columns: 1fr;
                gap: 16px;
            }

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

            .footer-bottom .container {
                flex-direction: column;
                gap: 8px;
                text-align: center;
            }
        }

        @media (min-width: 768px) and (max-width: 1023px) {
            .main-nav .nav-link {
                padding: 8px 12px;
                font-size: 14px;
            }

            .nav-cta {
                padding: 8px 14px;
                font-size: 13px;
                margin-left: 4px;
            }

            .brand-text {
                font-size: 18px;
            }

            .page-hero h1 {
                font-size: 36px;
            }
        }

/* roulang page: category2 */
:root {
      --primary: #4F46E5;
      --primary-dark: #4338CA;
      --purple: #7C3AED;
      --accent: #F59E0B;
      --success: #10B981;
      --bg: #FAFAFA;
      --bg-purple: #F5F3FF;
      --dark: #18181B;
      --card-bg: #FFFFFF;
      --text: #18181B;
      --text-secondary: #52525B;
      --text-muted: #A1A1AA;
      --border: #E4E4E7;
      --radius-lg: 20px;
      --radius-md: 14px;
      --radius-sm: 10px;
      --radius-pill: 999px;
      --shadow-sm: 0 4px 12px rgba(24, 24, 27, .05);
      --shadow-default: 0 8px 24px rgba(24, 24, 27, .06);
      --shadow-hover: 0 16px 40px rgba(79, 70, 229, .14);
      --shadow-dark: 0 12px 32px rgba(0, 0, 0, .25);
      --gradient-primary: linear-gradient(135deg, #4F46E5, #7C3AED);
      --transition: all .3s ease;
      --font-sans: "PingFang SC", "Microsoft YaHei", "HarmonyOS Sans SC", -apple-system, BlinkMacSystemFont, sans-serif;
      --font-num: "Inter", "DIN Alternate", "PingFang SC", sans-serif;
      --container: 1200px;
      --space-section: 88px;
    }

    *,
    *::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);
      background-color: var(--bg);
      -webkit-font-smoothing: antialiased;
      -moz-osx-font-smoothing: grayscale;
    }

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

    a {
      color: inherit;
      text-decoration: none;
      transition: var(--transition);
    }

    button {
      font-family: inherit;
      border: none;
      background: none;
      cursor: pointer;
    }

    ul,
    ol {
      list-style: none;
    }

    .container {
      width: 100%;
      max-width: var(--container);
      margin: 0 auto;
      padding-left: 24px;
      padding-right: 24px;
    }

    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 8px;
      height: 44px;
      padding: 0 28px;
      border-radius: var(--radius-sm);
      font-size: 15px;
      font-weight: 600;
      letter-spacing: .02em;
      transition: var(--transition);
      border: 2px solid transparent;
      white-space: nowrap;
    }

    .btn-primary {
      background: var(--gradient-primary);
      color: #fff;
      box-shadow: 0 4px 16px rgba(79, 70, 229, .28);
    }

    .btn-primary:hover {
      box-shadow: 0 8px 24px rgba(79, 70, 229, .38);
      transform: translateY(-2px);
    }

    .btn-primary:focus-visible {
      outline: 3px solid rgba(79, 70, 229, .4);
      outline-offset: 2px;
    }

    .btn-primary:active {
      transform: translateY(1px);
      box-shadow: 0 2px 8px rgba(79, 70, 229, .3);
    }

    .btn-secondary {
      background: #fff;
      color: var(--text);
      border-color: var(--border);
    }

    .btn-secondary:hover {
      border-color: var(--primary);
      color: var(--primary);
      transform: translateY(-2px);
      box-shadow: var(--shadow-default);
    }

    .btn-secondary:focus-visible {
      outline: 3px solid rgba(79, 70, 229, .3);
      outline-offset: 2px;
    }

    .btn-secondary:active {
      transform: translateY(1px);
    }

    .btn-sm {
      height: 38px;
      padding: 0 20px;
      font-size: 14px;
    }

    .btn-lg {
      height: 50px;
      padding: 0 36px;
      font-size: 16px;
    }

    /* ===== Site Header ===== */
    .site-header {
      position: sticky;
      top: 0;
      z-index: 100;
      background: rgba(255, 255, 255, .97);
      backdrop-filter: blur(8px);
      border-bottom: 1px solid rgba(228, 228, 231, .7);
      height: 72px;
      transition: box-shadow .3s ease;
    }

    .site-header.scrolled {
      box-shadow: 0 6px 24px rgba(24, 24, 27, .06);
    }

    .header-inner {
      height: 72px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 24px;
    }

    .brand {
      display: inline-flex;
      align-items: center;
      gap: 10px;
      flex-shrink: 0;
    }

    .brand-logo {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      width: 38px;
      height: 38px;
      border-radius: 10px;
      background: var(--gradient-primary);
      color: #fff;
      font-family: var(--font-num);
      font-size: 16px;
      font-weight: 800;
      letter-spacing: .02em;
      box-shadow: 0 4px 12px rgba(79, 70, 229, .3);
    }

    .brand-text {
      font-size: 20px;
      font-weight: 700;
      color: var(--text);
      letter-spacing: .01em;
      line-height: 1.2;
    }

    .main-nav {
      display: flex;
      align-items: center;
      gap: 4px;
    }

    .nav-link {
      display: block;
      padding: 8px 18px;
      border-radius: 999px;
      font-size: 15px;
      font-weight: 500;
      color: var(--text-secondary);
      transition: var(--transition);
      line-height: 1.4;
    }

    .nav-link:hover {
      background: var(--bg-purple);
      color: var(--primary);
    }

    .nav-link.active {
      background: var(--gradient-primary);
      color: #fff;
      font-weight: 600;
      box-shadow: 0 4px 12px rgba(79, 70, 229, .25);
    }

    .nav-cta {
      margin-left: 12px;
    }

    .header-actions {
      display: flex;
      align-items: center;
      gap: 12px;
    }

    .nav-toggle {
      display: none;
      flex-direction: column;
      justify-content: center;
      align-items: center;
      width: 42px;
      height: 42px;
      border-radius: 10px;
      background: var(--bg-purple);
      gap: 5px;
      padding: 10px;
      transition: var(--transition);
    }

    .nav-toggle span {
      display: block;
      width: 20px;
      height: 2px;
      background: var(--text);
      border-radius: 2px;
      transition: var(--transition);
    }

    .nav-toggle:hover {
      background: #E0E7FF;
    }

    .nav-toggle[aria-expanded="true"] span:nth-child(1) {
      transform: translateY(7px) rotate(45deg);
    }

    .nav-toggle[aria-expanded="true"] span:nth-child(2) {
      opacity: 0;
    }

    .nav-toggle[aria-expanded="true"] span:nth-child(3) {
      transform: translateY(-7px) rotate(-45deg);
    }

    /* ===== Page Hero ===== */
    .page-hero {
      position: relative;
      background: linear-gradient(135deg, rgba(79, 70, 229, .08), rgba(124, 58, 237, .1)), var(--bg-purple);
      padding: 72px 0 72px;
      overflow: hidden;
    }

    .page-hero::before {
      content: "";
      position: absolute;
      inset: 0;
      background: url('/assets/images/backpic/back-1.webp') center/cover no-repeat;
      opacity: .12;
      z-index: 0;
    }

    .page-hero::after {
      content: "";
      position: absolute;
      width: 420px;
      height: 420px;
      border-radius: 50%;
      background: radial-gradient(circle, rgba(79, 70, 229, .18), transparent 70%);
      top: -120px;
      right: -80px;
      z-index: 0;
    }

    .page-hero .container {
      position: relative;
      z-index: 1;
    }

    .hero-layout {
      display: grid;
      grid-template-columns: 1.05fr .95fr;
      gap: 64px;
      align-items: center;
    }

    .breadcrumb {
      display: flex;
      align-items: center;
      gap: 8px;
      font-size: 13px;
      color: var(--text-muted);
      margin-bottom: 20px;
      flex-wrap: wrap;
    }

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

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

    .breadcrumb .sep {
      color: #C0C0C4;
      font-size: 12px;
    }

    .breadcrumb .current {
      color: var(--text-secondary);
      font-weight: 500;
    }

    .hero-tag {
      display: inline-flex;
      align-items: center;
      gap: 6px;
      padding: 5px 16px;
      background: #fff;
      border: 1px solid var(--border);
      border-radius: var(--radius-pill);
      font-size: 13px;
      font-weight: 500;
      color: var(--primary);
      box-shadow: var(--shadow-sm);
      margin-bottom: 18px;
    }

    .hero-tag::before {
      content: "";
      width: 6px;
      height: 6px;
      border-radius: 50%;
      background: var(--success);
      display: inline-block;
    }

    .page-hero h1 {
      font-size: 42px;
      line-height: 1.2;
      font-weight: 700;
      color: var(--text);
      margin-bottom: 18px;
      letter-spacing: .01em;
    }

    .hero-desc {
      font-size: 16px;
      line-height: 1.75;
      color: var(--text-secondary);
      max-width: 540px;
      margin-bottom: 32px;
    }

    .hero-actions {
      display: flex;
      gap: 14px;
      flex-wrap: wrap;
    }

    .hero-visual {
      position: relative;
      border-radius: var(--radius-lg);
      overflow: hidden;
      box-shadow: var(--shadow-hover);
      height: 340px;
    }

    .hero-visual img {
      width: 100%;
      height: 100%;
      border-radius: var(--radius-lg);
    }

    .hero-visual::after {
      content: "";
      position: absolute;
      inset: 0;
      border-radius: var(--radius-lg);
      box-shadow: inset 0 0 0 1px rgba(255, 255, 255, .25);
      pointer-events: none;
    }

    .hero-badge-wrap {
      position: absolute;
      bottom: 20px;
      left: 20px;
      display: flex;
      gap: 10px;
      flex-wrap: wrap;
    }

    .hero-badge {
      display: inline-flex;
      align-items: center;
      gap: 6px;
      padding: 6px 16px;
      background: rgba(255, 255, 255, .9);
      backdrop-filter: blur(6px);
      border-radius: var(--radius-pill);
      font-size: 13px;
      font-weight: 600;
      color: var(--text);
      box-shadow: var(--shadow-sm);
    }

    .hero-badge .dot {
      width: 8px;
      height: 8px;
      border-radius: 50%;
      background: var(--success);
    }

    /* ===== Section ===== */
    .section {
      padding: var(--space-section) 0;
    }

    .section-alt {
      background: var(--bg-purple);
    }

    .section-dark {
      background: var(--dark);
      color: #fff;
    }

    .section-head {
      text-align: center;
      max-width: 620px;
      margin: 0 auto 56px;
    }

    .section-tag {
      display: inline-block;
      padding: 5px 16px;
      background: var(--bg-purple);
      border-radius: var(--radius-pill);
      font-size: 13px;
      font-weight: 600;
      color: var(--primary);
      margin-bottom: 14px;
      letter-spacing: .02em;
    }

    .section-head h2 {
      font-size: 32px;
      line-height: 1.3;
      font-weight: 700;
      color: var(--text);
      margin-bottom: 12px;
    }

    .section-head p {
      font-size: 15px;
      color: var(--text-secondary);
      line-height: 1.7;
    }

    /* ===== Steps ===== */
    .steps-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 24px;
    }

    .step-card {
      background: var(--card-bg);
      border: 1px solid var(--border);
      border-radius: var(--radius-lg);
      padding: 32px 24px;
      box-shadow: var(--shadow-default);
      transition: var(--transition);
      position: relative;
      overflow: hidden;
    }

    .step-card:hover {
      transform: translateY(-6px);
      box-shadow: var(--shadow-hover);
      border-color: rgba(79, 70, 229, .2);
    }

    .step-number {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      width: 48px;
      height: 48px;
      border-radius: 50%;
      background: var(--gradient-primary);
      color: #fff;
      font-family: var(--font-num);
      font-size: 16px;
      font-weight: 700;
      margin-bottom: 20px;
      box-shadow: 0 6px 16px rgba(79, 70, 229, .3);
    }

    .step-card h3 {
      font-size: 18px;
      font-weight: 600;
      color: var(--text);
      margin-bottom: 8px;
      line-height: 1.4;
    }

    .step-card p {
      font-size: 14px;
      color: var(--text-secondary);
      line-height: 1.65;
    }

    /* ===== Scenarios ===== */
    .scenario-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }

    .scenario-card {
      background: var(--card-bg);
      border: 1px solid var(--border);
      border-radius: var(--radius-lg);
      overflow: hidden;
      box-shadow: var(--shadow-default);
      transition: var(--transition);
      display: flex;
      flex-direction: column;
    }

    .scenario-card:hover {
      transform: translateY(-6px);
      box-shadow: var(--shadow-hover);
    }

    .scenario-img {
      position: relative;
      height: 180px;
      overflow: hidden;
    }

    .scenario-img img {
      width: 100%;
      height: 100%;
      transition: transform .5s ease;
    }

    .scenario-card:hover .scenario-img img {
      transform: scale(1.04);
    }

    .scenario-img::after {
      content: "";
      position: absolute;
      inset: 0;
      background: linear-gradient(to top, rgba(24, 24, 27, .1), transparent 50%);
    }

    .scenario-body {
      padding: 24px;
      display: flex;
      flex-direction: column;
      flex: 1;
    }

    .card-tag {
      display: inline-block;
      align-self: flex-start;
      padding: 4px 14px;
      background: var(--bg-purple);
      border-radius: var(--radius-pill);
      font-size: 12px;
      font-weight: 600;
      color: var(--primary);
      margin-bottom: 12px;
    }

    .scenario-body h3 {
      font-size: 18px;
      font-weight: 600;
      color: var(--text);
      margin-bottom: 8px;
      line-height: 1.4;
    }

    .scenario-body p {
      font-size: 14px;
      color: var(--text-secondary);
      line-height: 1.65;
      margin-bottom: 16px;
      flex: 1;
    }

    .text-link {
      display: inline-flex;
      align-items: center;
      gap: 6px;
      font-size: 14px;
      font-weight: 600;
      color: var(--primary);
    }

    .text-link:hover {
      color: var(--primary-dark);
      gap: 10px;
    }

    /* ===== Guide Section ===== */
    .guide-grid {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 32px;
    }

    .guide-card {
      background: var(--card-bg);
      border: 1px solid var(--border);
      border-radius: var(--radius-lg);
      overflow: hidden;
      box-shadow: var(--shadow-default);
      transition: var(--transition);
    }

    .guide-card:hover {
      box-shadow: var(--shadow-hover);
      transform: translateY(-4px);
    }

    .guide-card img {
      width: 100%;
      height: 220px;
    }

    .guide-content {
      padding: 28px;
    }

    .guide-content h3 {
      font-size: 20px;
      font-weight: 600;
      color: var(--text);
      margin-bottom: 14px;
      line-height: 1.4;
    }

    .guide-content ol {
      list-style: none;
      counter-reset: guide-counter;
    }

    .guide-content ol li {
      counter-increment: guide-counter;
      padding: 6px 0 6px 36px;
      position: relative;
      font-size: 14px;
      color: var(--text-secondary);
      line-height: 1.6;
    }

    .guide-content ol li::before {
      content: counter(guide-counter);
      position: absolute;
      left: 0;
      top: 8px;
      width: 24px;
      height: 24px;
      border-radius: 50%;
      background: var(--bg-purple);
      color: var(--primary);
      font-family: var(--font-num);
      font-size: 12px;
      font-weight: 700;
      display: flex;
      align-items: center;
      justify-content: center;
    }

    .guide-note {
      margin-top: 14px;
      padding: 12px 16px;
      background: var(--bg-purple);
      border-radius: var(--radius-md);
      font-size: 13px;
      color: var(--text-secondary);
      border-left: 4px solid var(--primary);
      line-height: 1.6;
    }

    /* ===== Tips ===== */
    .tips-panel {
      background: var(--dark);
      border-radius: var(--radius-lg);
      padding: 56px 48px;
      display: grid;
      grid-template-columns: 1fr 1.2fr;
      gap: 48px;
      align-items: center;
      color: #fff;
      box-shadow: var(--shadow-dark);
    }

    .tips-panel .section-tag {
      background: rgba(255, 255, 255, .1);
      color: #fff;
    }

    .tips-panel h2 {
      font-size: 28px;
      font-weight: 700;
      color: #fff;
      margin-bottom: 14px;
      line-height: 1.3;
    }

    .tips-panel .tips-intro {
      font-size: 15px;
      color: rgba(255, 255, 255, .7);
      line-height: 1.7;
    }

    .tips-list {
      display: flex;
      flex-direction: column;
      gap: 16px;
    }

    .tips-list li {
      display: flex;
      align-items: flex-start;
      gap: 14px;
      padding: 16px 20px;
      background: rgba(255, 255, 255, .06);
      border-radius: var(--radius-md);
      border: 1px solid rgba(255, 255, 255, .08);
      font-size: 14px;
      color: rgba(255, 255, 255, .85);
      line-height: 1.65;
      transition: var(--transition);
    }

    .tips-list li:hover {
      background: rgba(255, 255, 255, .1);
      border-color: rgba(255, 255, 255, .15);
    }

    .tips-list li::before {
      content: "✓";
      flex-shrink: 0;
      width: 22px;
      height: 22px;
      border-radius: 50%;
      background: rgba(16, 185, 129, .2);
      color: var(--success);
      font-size: 12px;
      font-weight: 700;
      display: flex;
      align-items: center;
      justify-content: center;
      margin-top: 2px;
    }

    /* ===== FAQ ===== */
    .faq-layout {
      display: grid;
      grid-template-columns: 1fr 2fr;
      gap: 48px;
      align-items: start;
    }

    .faq-intro {
      background: var(--card-bg);
      border: 1px solid var(--border);
      border-radius: var(--radius-lg);
      padding: 32px;
      box-shadow: var(--shadow-default);
      position: sticky;
      top: 90px;
    }

    .faq-intro h3 {
      font-size: 22px;
      font-weight: 700;
      color: var(--text);
      margin-bottom: 12px;
      line-height: 1.4;
    }

    .faq-intro p {
      font-size: 14px;
      color: var(--text-secondary);
      line-height: 1.7;
      margin-bottom: 20px;
    }

    .faq-intro .btn {
      width: 100%;
    }

    .faq-list {
      display: flex;
      flex-direction: column;
      gap: 16px;
    }

    .faq-item {
      background: var(--card-bg);
      border: 1px solid var(--border);
      border-radius: var(--radius-lg);
      overflow: hidden;
      box-shadow: var(--shadow-default);
      transition: var(--transition);
    }

    .faq-item:hover {
      border-color: rgba(79, 70, 229, .2);
      box-shadow: var(--shadow-hover);
    }

    .faq-question {
      width: 100%;
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 16px;
      padding: 20px 24px;
      background: #fff;
      font-size: 15px;
      font-weight: 600;
      color: var(--text);
      text-align: left;
      cursor: pointer;
      transition: var(--transition);
      line-height: 1.5;
    }

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

    .faq-icon {
      flex-shrink: 0;
      width: 28px;
      height: 28px;
      border-radius: 50%;
      background: var(--bg-purple);
      color: var(--primary);
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 18px;
      font-weight: 400;
      transition: var(--transition);
      line-height: 1;
    }

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

    .faq-answer {
      max-height: 0;
      overflow: hidden;
      transition: max-height .35s ease, padding .3s ease;
      background: #fff;
    }

    .faq-answer-inner {
      padding: 0 24px 20px;
      font-size: 14px;
      color: var(--text-secondary);
      line-height: 1.75;
      border-top: 1px solid var(--border);
      padding-top: 14px;
    }

    .faq-item.active .faq-answer {
      max-height: 300px;
    }

    /* ===== CTA ===== */
    .cta-card {
      background: var(--gradient-primary);
      border-radius: var(--radius-lg);
      padding: 64px 48px;
      text-align: center;
      color: #fff;
      position: relative;
      overflow: hidden;
      box-shadow: var(--shadow-hover);
    }

    .cta-card::before {
      content: "";
      position: absolute;
      width: 300px;
      height: 300px;
      border-radius: 50%;
      background: rgba(255, 255, 255, .08);
      top: -120px;
      right: -80px;
    }

    .cta-card::after {
      content: "";
      position: absolute;
      width: 200px;
      height: 200px;
      border-radius: 50%;
      background: rgba(255, 255, 255, .06);
      bottom: -80px;
      left: -40px;
    }

    .cta-card h2 {
      font-size: 30px;
      font-weight: 700;
      color: #fff;
      margin-bottom: 12px;
      line-height: 1.3;
      position: relative;
      z-index: 1;
    }

    .cta-card p {
      font-size: 15px;
      color: rgba(255, 255, 255, .85);
      margin-bottom: 28px;
      max-width: 500px;
      margin-left: auto;
      margin-right: auto;
      position: relative;
      z-index: 1;
    }

    .cta-actions {
      display: flex;
      justify-content: center;
      gap: 14px;
      flex-wrap: wrap;
      position: relative;
      z-index: 1;
    }

    .cta-card .btn-white {
      background: #fff;
      color: var(--primary);
      border-color: #fff;
    }

    .cta-card .btn-white:hover {
      background: rgba(255, 255, 255, .9);
      transform: translateY(-2px);
      box-shadow: 0 8px 24px rgba(0, 0, 0, .15);
    }

    .cta-card .btn-outline-white {
      background: transparent;
      color: #fff;
      border-color: rgba(255, 255, 255, .6);
    }

    .cta-card .btn-outline-white:hover {
      background: rgba(255, 255, 255, .1);
      border-color: #fff;
      transform: translateY(-2px);
    }

    /* ===== Footer ===== */
    .site-footer {
      background: var(--dark);
      color: rgba(255, 255, 255, .7);
      padding: 64px 0 0;
    }

    .footer-grid {
      display: grid;
      grid-template-columns: 1.4fr 1fr 1.2fr;
      gap: 48px;
      padding-bottom: 40px;
    }

    .footer-brand .brand {
      margin-bottom: 16px;
    }

    .footer-brand .brand-text {
      color: #fff;
    }

    .footer-brand p {
      font-size: 14px;
      line-height: 1.7;
      color: rgba(255, 255, 255, .6);
      max-width: 320px;
    }

    .footer-links h4,
    .footer-meta h4 {
      font-size: 15px;
      font-weight: 600;
      color: #fff;
      margin-bottom: 18px;
      letter-spacing: .02em;
    }

    .footer-links a {
      display: block;
      padding: 5px 0;
      font-size: 14px;
      color: rgba(255, 255, 255, .6);
      transition: var(--transition);
    }

    .footer-links a:hover {
      color: #fff;
      text-decoration: underline;
      text-underline-offset: 4px;
    }

    .footer-meta p {
      font-size: 13px;
      line-height: 1.7;
      color: rgba(255, 255, 255, .5);
    }

    .footer-bottom {
      border-top: 1px solid rgba(255, 255, 255, .1);
      padding: 20px 0;
    }

    .footer-bottom .container {
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 16px;
      flex-wrap: wrap;
      font-size: 13px;
      color: rgba(255, 255, 255, .45);
    }

    .icp-placeholder {
      color: rgba(255, 255, 255, .35);
    }

    /* ===== Responsive ===== */
    @media (max-width: 1023px) {
      :root {
        --space-section: 64px;
      }

      .steps-grid {
        grid-template-columns: repeat(2, 1fr);
      }

      .scenario-grid {
        grid-template-columns: repeat(2, 1fr);
      }

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

      .faq-layout {
        grid-template-columns: 1fr;
      }

      .faq-intro {
        position: static;
      }

      .tips-panel {
        grid-template-columns: 1fr;
        padding: 40px 32px;
        gap: 32px;
      }

      .hero-layout {
        grid-template-columns: 1fr;
        gap: 40px;
      }

      .hero-visual {
        height: 300px;
      }

      .nav-cta {
        display: none;
      }

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

    @media (max-width: 767px) {
      :root {
        --space-section: 48px;
      }

      .site-header {
        height: 64px;
      }

      .header-inner {
        height: 64px;
      }

      .brand-logo {
        width: 32px;
        height: 32px;
        font-size: 14px;
        border-radius: 8px;
      }

      .brand-text {
        font-size: 18px;
      }

      .main-nav {
        position: fixed;
        top: 64px;
        left: 0;
        right: 0;
        background: #fff;
        border-bottom: 1px solid var(--border);
        flex-direction: column;
        align-items: stretch;
        padding: 16px 24px 24px;
        gap: 8px;
        display: none;
        box-shadow: 0 12px 32px rgba(24, 24, 27, .1);
        z-index: 99;
      }

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

      .nav-link {
        padding: 12px 16px;
        font-size: 15px;
        border-radius: 12px;
      }

      .nav-link.active {
        background: var(--gradient-primary);
        color: #fff;
      }

      .nav-cta {
        display: inline-flex;
        margin-left: 0;
        margin-top: 8px;
        width: 100%;
        justify-content: center;
      }

      .header-cta {
        display: none;
      }

      .nav-toggle {
        display: flex;
      }

      .page-hero {
        padding: 48px 0;
      }

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

      .hero-desc {
        font-size: 14px;
        margin-bottom: 24px;
      }

      .hero-actions {
        flex-direction: column;
        align-items: stretch;
      }

      .hero-actions .btn {
        width: 100%;
      }

      .hero-visual {
        height: 220px;
      }

      .section-head h2 {
        font-size: 24px;
      }

      .steps-grid,
      .scenario-grid {
        grid-template-columns: 1fr;
        gap: 16px;
      }

      .guide-card img {
        height: 180px;
      }

      .tips-panel {
        padding: 32px 24px;
        border-radius: 16px;
      }

      .tips-panel h2 {
        font-size: 22px;
      }

      .cta-card {
        padding: 40px 24px;
        border-radius: 16px;
      }

      .cta-card h2 {
        font-size: 24px;
      }

      .cta-actions {
        flex-direction: column;
        align-items: stretch;
      }

      .cta-actions .btn {
        width: 100%;
      }

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

      .footer-bottom .container {
        flex-direction: column;
        text-align: center;
        gap: 8px;
      }
    }

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

      .brand-text {
        font-size: 16px;
      }

      .brand-logo {
        width: 30px;
        height: 30px;
        font-size: 13px;
      }

      .hero-badge-wrap {
        bottom: 12px;
        left: 12px;
        gap: 6px;
      }

      .hero-badge {
        padding: 4px 10px;
        font-size: 11px;
      }

      .step-card {
        padding: 24px 20px;
      }

      .scenario-body {
        padding: 20px;
      }
    }