/* roulang page: index */
:root {
  --primary: #7c3aed;
  --primary-dark: #5b21b6;
  --primary-light: #8b5cf6;
  --accent: #f59e0b;
  --accent-dark: #d97706;
  --accent-light: #fbbf24;
  --bg: #f8fafc;
  --surface: #ffffff;
  --surface-2: #f1f5f9;
  --text: #1e293b;
  --muted: #64748b;
  --border: #e2e8f0;
  --radius: 16px;
  --radius-sm: 10px;
  --radius-lg: 24px;
  --shadow-sm: 0 1px 3px rgba(15,23,42,.08);
  --shadow: 0 12px 32px rgba(15,23,42,.08);
  --shadow-lg: 0 24px 48px rgba(15,23,42,.12);
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}
html {
  scroll-behavior: smooth;
}
body {
  background: var(--bg);
  color: var(--text);
  line-height: 1.75;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans CJK SC", sans-serif;
  -webkit-font-smoothing: antialiased;
}
a {
  color: inherit;
  text-decoration: none;
  transition: color .25s ease, background .25s ease, border-color .25s ease, box-shadow .25s ease, opacity .25s ease;
}
img {
  max-width: 100%;
  height: auto;
  display: block;
  border-radius: var(--radius);
}
button, input, select, textarea {
  font: inherit;
  color: inherit;
}
input:focus-visible, button:focus-visible, a:focus-visible, summary:focus-visible {
  outline: 3px solid rgba(124, 58, 237, .3);
  outline-offset: 3px;
  border-radius: 6px;
}
ul, ol {
  list-style: none;
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}
.section {
  padding: 92px 0;
}
.section-head {
  max-width: 700px;
  margin: 0 auto 56px;
  text-align: center;
}
.section-tag {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  font-weight: 700;
  letter-spacing: .08em;
  color: var(--primary);
  background: rgba(124, 58, 237, .1);
  border: 1px solid rgba(124, 58, 237, .18);
  padding: 6px 16px;
  border-radius: 999px;
  text-transform: uppercase;
}
.section-head h2 {
  font-size: clamp(26px, 4vw, 36px);
  line-height: 1.3;
  font-weight: 800;
  margin-top: 16px;
  letter-spacing: -.01em;
  color: var(--text);
}
.section-head p {
  color: var(--muted);
  margin-top: 12px;
  font-size: 16px;
  line-height: 1.7;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-weight: 600;
  border-radius: 12px;
  padding: 11px 20px;
  font-size: 14px;
  line-height: 1;
  border: 1.5px solid transparent;
  cursor: pointer;
  transition: transform .2s ease, box-shadow .2s ease, background .2s ease, border-color .2s ease, color .2s ease;
  white-space: nowrap;
}
.btn-lg {
  padding: 15px 30px;
  font-size: 16px;
  border-radius: 14px;
}
.btn-sm {
  padding: 9px 18px;
  font-size: 13px;
  border-radius: 10px;
}
.btn-primary {
  background: var(--primary);
  color: #fff;
  box-shadow: 0 4px 16px rgba(124, 58, 237, .28);
}
.btn-primary:hover {
  background: var(--primary-dark);
  transform: translateY(-2px);
  box-shadow: 0 10px 24px rgba(124, 58, 237, .32);
}
.btn-accent {
  background: linear-gradient(135deg, var(--accent) 0%, var(--accent-dark) 100%);
  color: #fff;
  box-shadow: 0 4px 16px rgba(245, 158, 11, .3);
}
.btn-accent:hover {
  transform: translateY(-2px);
  box-shadow: 0 10px 28px rgba(245, 158, 11, .36);
}
.btn-ghost {
  background: rgba(255, 255, 255, .08);
  color: #fff;
  border-color: rgba(255, 255, 255, .2);
  backdrop-filter: blur(6px);
}
.btn-ghost:hover {
  background: rgba(255, 255, 255, .14);
  border-color: rgba(255, 255, 255, .34);
  transform: translateY(-2px);
}
.btn-outline {
  background: transparent;
  color: var(--primary);
  border-color: rgba(124, 58, 237, .3);
}
.btn-outline:hover {
  background: rgba(124, 58, 237, .08);
  border-color: var(--primary);
  transform: translateY(-2px);
}
.btn:active {
  transform: translateY(0) scale(.97);
}

.badge {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: .02em;
  padding: 4px 12px;
  border-radius: 999px;
  background: var(--surface-2);
  color: var(--muted);
  border: 1px solid var(--border);
}
.badge-primary {
  background: rgba(124, 58, 237, .1);
  color: var(--primary);
  border-color: rgba(124, 58, 237, .18);
}
.badge-accent {
  background: rgba(245, 158, 11, .12);
  color: #b45309;
  border-color: rgba(245, 158, 11, .24);
}

/* ===== Header ===== */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  background: rgba(255, 255, 255, .82);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid rgba(226, 232, 240, .7);
  box-shadow: 0 1px 0 rgba(15, 23, 42, .03);
}
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 70px;
  gap: 24px;
}
.logo {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
}
.logo-mark {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border-radius: 10px;
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%);
  color: #fff;
  font-weight: 800;
  font-size: 18px;
  box-shadow: 0 4px 12px rgba(124, 58, 237, .3);
}
.logo-text {
  font-size: 19px;
  font-weight: 800;
  letter-spacing: -.01em;
  color: var(--text);
  white-space: nowrap;
}
.site-nav {
  display: flex;
  align-items: center;
  gap: 6px;
}
.nav-link {
  position: relative;
  font-size: 14.5px;
  font-weight: 550;
  color: var(--muted);
  padding: 8px 14px;
  border-radius: 10px;
  transition: color .2s, background .2s;
}
.nav-link:hover {
  color: var(--text);
  background: var(--surface-2);
}
.nav-link.active {
  color: var(--primary);
  background: rgba(124, 58, 237, .08);
  font-weight: 650;
}
.nav-link.active::after {
  content: "";
  position: absolute;
  bottom: 2px;
  left: 16px;
  right: 16px;
  height: 2px;
  border-radius: 2px;
  background: var(--primary);
}
.nav-actions {
  display: flex;
  align-items: center;
  gap: 12px;
}
.search-box {
  display: flex;
  align-items: center;
  gap: 8px;
  background: var(--surface-2);
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 7px 12px 7px 14px;
  width: 230px;
  transition: border-color .2s, box-shadow .2s, background .2s;
}
.search-box:focus-within {
  border-color: var(--primary);
  background: #fff;
  box-shadow: 0 0 0 4px rgba(124, 58, 237, .1);
}
.search-box .search-icon {
  width: 15px;
  height: 15px;
  color: var(--muted);
  flex-shrink: 0;
}
.search-box input {
  border: none;
  outline: none;
  background: transparent;
  font-size: 13.5px;
  width: 100%;
  color: var(--text);
}
.search-box input::placeholder {
  color: #94a3b8;
}
.search-box kbd {
  flex-shrink: 0;
  font-size: 11px;
  line-height: 1;
  font-family: inherit;
  color: var(--muted);
  background: #fff;
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 3px 6px;
  box-shadow: 0 1px 2px rgba(15, 23, 42, .05);
}
.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: transparent;
  border: none;
  width: 40px;
  height: 40px;
  align-items: center;
  justify-content: center;
  border-radius: 10px;
  cursor: pointer;
}
.nav-toggle span {
  display: block;
  width: 20px;
  height: 2px;
  border-radius: 2px;
  background: var(--text);
  transition: transform .3s, opacity .3s;
}
.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);
}
.nav-mobile-actions {
  display: none;
}

/* ===== Hero ===== */
.hero {
  position: relative;
  min-height: 92vh;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 150px 24px 100px;
  background:
    linear-gradient(135deg, rgba(30, 27, 75, .82) 0%, rgba(76, 29, 149, .7) 55%, rgba(15, 23, 42, .78) 100%),
    url('/assets/images/backpic/back-1.png') center / cover no-repeat;
  color: #fff;
  overflow: hidden;
}
.hero::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 140px;
  background: linear-gradient(to top, var(--bg) 0%, transparent 100%);
  pointer-events: none;
}
.hero-content {
  position: relative;
  z-index: 2;
  max-width: 820px;
}
.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  font-weight: 700;
  padding: 8px 18px;
  border-radius: 999px;
  background: rgba(255, 255, 255, .12);
  border: 1px solid rgba(255, 255, 255, .24);
  backdrop-filter: blur(8px);
  margin-bottom: 24px;
}
.hero-badge i {
  color: var(--accent-light);
}
.hero h1 {
  font-size: clamp(34px, 6vw, 58px);
  font-weight: 800;
  line-height: 1.2;
  letter-spacing: -.02em;
  margin-bottom: 20px;
  text-shadow: 0 2px 30px rgba(0, 0, 0, .25);
}
.hero p {
  font-size: clamp(16px, 2vw, 19px);
  line-height: 1.8;
  color: rgba(255, 255, 255, .82);
  margin-bottom: 36px;
  max-width: 620px;
  margin-left: auto;
  margin-right: auto;
}
.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  justify-content: center;
  margin-bottom: 34px;
}
.hero-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  justify-content: center;
}
.hero-tags span {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 13px;
  color: rgba(255, 255, 255, .72);
  background: rgba(255, 255, 255, .08);
  border: 1px solid rgba(255, 255, 255, .12);
  padding: 6px 14px;
  border-radius: 999px;
}

/* ===== Stats ===== */
.stats-section {
  padding: 56px 0 64px;
  margin-top: -20px;
  position: relative;
  z-index: 3;
}
.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}
.stat-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 30px 24px;
  text-align: center;
  box-shadow: var(--shadow-sm);
  transition: transform .25s, box-shadow .25s;
}
.stat-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow);
}
.stat-number {
  font-size: 36px;
  font-weight: 800;
  color: var(--primary);
  line-height: 1.2;
  letter-spacing: -.02em;
}
.stat-label {
  font-size: 14px;
  color: var(--muted);
  margin-top: 8px;
}

/* ===== Features ===== */
.features-section {
  background: var(--surface);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}
.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}
.feature-card {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 36px 30px;
  transition: transform .25s, box-shadow .25s, border-color .25s;
  position: relative;
  overflow: hidden;
}
.feature-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: linear-gradient(90deg, var(--primary), var(--accent));
  opacity: 0;
  transition: opacity .25s;
}
.feature-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow);
  border-color: rgba(124, 58, 237, .15);
}
.feature-card:hover::before {
  opacity: 1;
}
.feature-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 50px;
  height: 50px;
  border-radius: 14px;
  font-size: 20px;
  color: var(--primary);
  background: rgba(124, 58, 237, .1);
  margin-bottom: 22px;
}
.feature-card:nth-child(2) .feature-icon {
  color: #0ea5e9;
  background: rgba(14, 165, 233, .1);
}
.feature-card:nth-child(3) .feature-icon {
  color: #10b981;
  background: rgba(16, 185, 129, .1);
}
.feature-card:nth-child(4) .feature-icon {
  color: #f59e0b;
  background: rgba(245, 158, 11, .12);
}
.feature-card:nth-child(5) .feature-icon {
  color: #f43f5e;
  background: rgba(244, 63, 94, .1);
}
.feature-card:nth-child(6) .feature-icon {
  color: #8b5cf6;
  background: rgba(139, 92, 246, .1);
}
.feature-card h3 {
  font-size: 18px;
  font-weight: 750;
  margin-bottom: 10px;
  color: var(--text);
}
.feature-card p {
  font-size: 14.5px;
  color: var(--muted);
  line-height: 1.75;
}

/* ===== Categories ===== */
.categories-section {
  background: var(--bg);
}
.categories-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 32px;
}
.category-card {
  position: relative;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  transition: transform .3s, box-shadow .3s;
}
.category-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-lg);
}
.category-img {
  width: 100%;
  height: 230px;
  object-fit: cover;
  border-radius: 0;
  transition: transform .5s ease;
}
.category-card:hover .category-img {
  transform: scale(1.04);
}
.category-body {
  padding: 30px;
}
.category-body .badge {
  margin-bottom: 14px;
}
.category-body h3 {
  font-size: 22px;
  font-weight: 800;
  margin-bottom: 10px;
}
.category-body p {
  font-size: 14.5px;
  color: var(--muted);
  line-height: 1.75;
  margin-bottom: 22px;
}

/* ===== Latest News ===== */
.latest-section {
  background: linear-gradient(180deg, var(--bg) 0%, #f3eefe 100%);
}
.latest-list {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
}
.news-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px 30px;
  box-shadow: var(--shadow-sm);
  transition: transform .25s, box-shadow .25s;
  border-left: 4px solid transparent;
  position: relative;
  overflow: hidden;
}
.news-card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow);
  border-left-color: var(--primary);
}
.news-card-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 16px;
  flex-wrap: wrap;
}
.news-date {
  font-size: 13px;
  color: var(--muted);
}
.news-card h3 {
  font-size: 18px;
  font-weight: 750;
  line-height: 1.5;
  margin-bottom: 10px;
}
.news-card h3 a:hover {
  color: var(--primary);
}
.news-card p {
  font-size: 14px;
  color: var(--muted);
  line-height: 1.7;
  margin-bottom: 18px;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.news-more {
  font-size: 13.5px;
  font-weight: 650;
  color: var(--primary);
  display: inline-flex;
  align-items: center;
  gap: 4px;
}
.news-more:hover {
  gap: 8px;
}
.empty-tip {
  grid-column: 1 / -1;
  text-align: center;
  color: var(--muted);
  background: var(--surface);
  border: 1px dashed var(--border);
  border-radius: var(--radius);
  padding: 46px 24px;
  font-size: 15px;
}

/* ===== Workflow ===== */
.workflow-section {
  background: var(--surface);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}
.workflow-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
  counter-reset: step;
}
.step-card {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 38px 30px;
  position: relative;
  transition: transform .25s, box-shadow .25s;
}
.step-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow);
}
.step-num {
  font-size: 44px;
  font-weight: 800;
  line-height: 1;
  color: rgba(124, 58, 237, .18);
  margin-bottom: 22px;
  letter-spacing: -.03em;
}
.step-card h3 {
  font-size: 18px;
  font-weight: 750;
  margin-bottom: 10px;
}
.step-card p {
  font-size: 14.5px;
  color: var(--muted);
  line-height: 1.7;
}

/* ===== Showcase ===== */
.showcase-section {
  background: var(--bg);
}
.showcase-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}
.showcase-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  transition: transform .3s, box-shadow .3s;
}
.showcase-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-lg);
}
.showcase-card img {
  width: 100%;
  height: 190px;
  object-fit: cover;
  border-radius: 0;
  transition: transform .5s ease;
}
.showcase-card:hover img {
  transform: scale(1.03);
}
.showcase-content {
  padding: 26px 28px 30px;
}
.showcase-content .badge {
  margin-bottom: 14px;
}
.showcase-content h3 {
  font-size: 18px;
  font-weight: 750;
  margin-bottom: 10px;
}
.showcase-content p {
  font-size: 14px;
  color: var(--muted);
  line-height: 1.7;
}

/* ===== FAQ ===== */
.faq-section {
  background: var(--surface);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}
.faq-container {
  max-width: 820px;
}
.faq-list {
  display: flex;
  flex-direction: column;
  gap: 16px;
}
.faq-item {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 0;
  overflow: hidden;
  transition: border-color .25s, box-shadow .25s;
}
.faq-item[open] {
  border-color: rgba(124, 58, 237, .3);
  box-shadow: var(--shadow-sm);
}
.faq-item summary {
  cursor: pointer;
  list-style: none;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 20px 26px;
  font-size: 16px;
  font-weight: 650;
  color: var(--text);
}
.faq-item summary::-webkit-details-marker {
  display: none;
}
.faq-item summary::after {
  content: "\f078";
  font-family: "Font Awesome 6 Free";
  font-weight: 900;
  font-size: 13px;
  color: var(--muted);
  transition: transform .3s;
  flex-shrink: 0;
}
.faq-item[open] summary::after {
  transform: rotate(180deg);
  color: var(--primary);
}
.faq-item p {
  padding: 0 26px 22px;
  font-size: 14.5px;
  color: var(--muted);
  line-height: 1.75;
}

/* ===== CTA ===== */
.cta-section {
  background: var(--bg);
}
.cta-card {
  position: relative;
  border-radius: var(--radius-lg);
  padding: 64px 48px;
  text-align: center;
  background:
    linear-gradient(120deg, rgba(91, 33, 182, .92), rgba(124, 58, 237, .82)),
    url('/assets/images/backpic/back-2.png') center / cover no-repeat;
  color: #fff;
  box-shadow: var(--shadow-lg);
  overflow: hidden;
}
.cta-card h2 {
  font-size: clamp(24px, 4vw, 34px);
  font-weight: 800;
  margin-bottom: 14px;
  letter-spacing: -.01em;
}
.cta-card p {
  font-size: 16px;
  color: rgba(255, 255, 255, .82);
  max-width: 520px;
  margin: 0 auto 32px;
}
.cta-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  justify-content: center;
}

/* ===== Footer ===== */
.site-footer {
  background: #0f172a;
  color: #94a3b8;
  padding: 64px 0 0;
}
.footer-top {
  display: grid;
  grid-template-columns: 1.2fr 2fr;
  gap: 48px;
  padding-bottom: 48px;
  border-bottom: 1px solid rgba(148, 163, 184, .14);
}
.footer-brand .logo-text {
  color: #fff;
}
.footer-brand .logo-mark {
  background: linear-gradient(135deg, var(--primary-light), var(--accent));
}
.footer-brand p {
  font-size: 14px;
  line-height: 1.75;
  margin-top: 18px;
  max-width: 300px;
}
.footer-nav {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
}
.footer-col h4 {
  color: #fff;
  font-size: 15px;
  font-weight: 700;
  margin-bottom: 18px;
  letter-spacing: .02em;
}
.footer-col a {
  display: block;
  font-size: 14px;
  color: #94a3b8;
  margin-bottom: 10px;
  transition: color .2s, padding-left .2s;
}
.footer-col a:hover {
  color: #fff;
  padding-left: 4px;
}
.footer-note {
  font-size: 14px;
  line-height: 1.75;
}
.footer-bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
  padding: 24px 0;
  font-size: 13px;
  color: #64748b;
}

/* ===== Responsive ===== */
@media (max-width: 1024px) {
  .features-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .showcase-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .stats-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .search-box {
    width: 180px;
  }
  .section {
    padding: 72px 0;
  }
}

@media (max-width: 820px) {
  .site-header {
    position: sticky;
  }
  .header-inner {
    height: 64px;
  }
  .nav-cta {
    display: none;
  }
  .search-box {
    display: none;
  }
  .nav-toggle {
    display: flex;
  }
  .site-nav {
    position: fixed;
    top: 64px;
    left: 0;
    right: 0;
    background: #fff;
    flex-direction: column;
    align-items: stretch;
    gap: 4px;
    padding: 16px 24px 24px;
    border-bottom: 1px solid var(--border);
    box-shadow: var(--shadow);
    transform: translateY(-120%);
    opacity: 0;
    visibility: hidden;
    transition: transform .35s ease, opacity .35s ease, visibility .35s;
    z-index: 99;
  }
  .site-nav.open {
    transform: translateY(0);
    opacity: 1;
    visibility: visible;
  }
  .site-nav .nav-link {
    font-size: 16px;
    padding: 12px 16px;
  }
  .site-nav .nav-link.active::after {
    display: none;
  }
  .nav-mobile-actions {
    display: block;
    margin-top: 14px;
    padding-top: 14px;
    border-top: 1px solid var(--border);
  }
  .hero {
    padding: 110px 24px 90px;
    min-height: auto;
  }
}

@media (max-width: 640px) {
  .footer-top {
    grid-template-columns: 1fr;
    gap: 36px;
  }
  .footer-nav {
    grid-template-columns: 1fr 1fr;
  }
  .categories-grid,
  .features-grid,
  .showcase-grid,
  .workflow-grid,
  .latest-list,
  .stats-grid {
    grid-template-columns: 1fr;
  }
  .category-img {
    height: 190px;
  }
  .cta-card {
    padding: 44px 24px;
  }
  .hero h1 {
    font-size: 32px;
  }
  .section {
    padding: 56px 0;
  }
  .section-head {
    margin-bottom: 36px;
  }
  .hero-actions .btn {
    width: 100%;
  }
  .footer-bottom {
    flex-direction: column;
    text-align: center;
  }
}

@media (max-width: 480px) {
  .container {
    padding: 0 16px;
  }
  .logo-text {
    font-size: 17px;
  }
  .stat-number {
    font-size: 28px;
  }
  .footer-nav {
    grid-template-columns: 1fr;
  }
  .btn-lg {
    padding: 13px 20px;
    font-size: 15px;
  }
}

/* roulang page: category1 */
:root {
            --primary: #4f7cff;
            --primary-dark: #3a5fd9;
            --primary-light: #eaf0ff;
            --accent: #00c2a8;
            --accent-dark: #009b85;
            --dark: #0f172a;
            --text-body: #1e293b;
            --text-muted: #64748b;
            --bg-soft: #f8fafc;
            --border: #e2e8f0;
            --radius-lg: 20px;
            --radius-md: 14px;
            --radius-sm: 10px;
            --shadow-sm: 0 2px 8px rgba(15, 23, 42, .06);
            --shadow-md: 0 8px 30px rgba(15, 23, 42, .08);
            --shadow-lg: 0 20px 50px rgba(15, 23, 42, .12);
            --font-sans: 'Inter', 'PingFang SC', 'Microsoft YaHei', 'system-ui', 'sans-serif';
            --space-section: 96px;
        }

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

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: var(--font-sans);
            color: var(--text-body);
            background: #ffffff;
            line-height: 1.6;
            -webkit-font-smoothing: antialiased;
        }

        .container {
            max-width: 1280px;
            margin: 0 auto;
            padding: 0 32px;
        }

        a {
            text-decoration: none;
            color: inherit;
            transition: color .2s ease;
        }

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

        /* ========== Header / Nav ========== */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 100;
            background: rgba(255, 255, 255, 0.92);
            backdrop-filter: blur(12px);
            border-bottom: 1px solid var(--border);
            transition: box-shadow .3s ease;
        }

        .site-header.scrolled {
            box-shadow: 0 4px 20px rgba(15, 23, 42, .06);
        }

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

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

        .logo-mark {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 40px;
            height: 40px;
            border-radius: 12px;
            background: linear-gradient(135deg, var(--primary) 0%, #7aa2ff 100%);
            color: #fff;
            font-weight: 800;
            font-size: 20px;
            box-shadow: 0 4px 12px rgba(79, 124, 255, .35);
            letter-spacing: -0.5px;
        }

        .logo-text {
            font-size: 18px;
            font-weight: 700;
            color: var(--dark);
            letter-spacing: -0.3px;
            white-space: nowrap;
        }

        .site-nav {
            display: flex;
            align-items: center;
            gap: 6px;
        }

        .nav-link {
            display: inline-flex;
            align-items: center;
            padding: 10px 16px;
            border-radius: 10px;
            font-size: 15px;
            font-weight: 500;
            color: var(--text-muted);
            transition: all .2s ease;
            line-height: 1;
        }

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

        .nav-link.active {
            color: var(--primary);
            background: var(--primary-light);
            font-weight: 600;
        }

        .nav-actions {
            display: flex;
            align-items: center;
            gap: 14px;
        }

        .search-box {
            display: flex;
            align-items: center;
            gap: 8px;
            background: var(--bg-soft);
            border: 1px solid var(--border);
            border-radius: 10px;
            padding: 8px 12px;
            transition: all .2s ease;
            color: var(--text-muted);
        }

        .search-box:focus-within {
            border-color: var(--primary);
            box-shadow: 0 0 0 3px rgba(79, 124, 255, .12);
        }

        .search-box .search-icon {
            width: 17px;
            height: 17px;
            flex-shrink: 0;
        }

        .search-box input {
            border: none;
            outline: none;
            background: transparent;
            font-size: 14px;
            width: 150px;
            color: var(--text-body);
        }

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

        .search-box kbd {
            font-size: 11px;
            font-family: inherit;
            background: #fff;
            border: 1px solid var(--border);
            border-radius: 5px;
            padding: 2px 6px;
            color: var(--text-muted);
            white-space: nowrap;
        }

        .nav-toggle {
            display: none;
            flex-direction: column;
            gap: 5px;
            background: none;
            border: none;
            cursor: pointer;
            padding: 6px;
        }

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

        .nav-mobile-actions {
            display: none;
        }

        /* ========== Buttons ========== */
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            border-radius: 10px;
            font-weight: 600;
            font-size: 15px;
            padding: 12px 24px;
            border: none;
            cursor: pointer;
            transition: all .25s ease;
            line-height: 1.4;
            white-space: nowrap;
        }

        .btn-primary {
            background: var(--primary);
            color: #fff;
            box-shadow: 0 4px 14px rgba(79, 124, 255, .3);
        }

        .btn-primary:hover {
            background: var(--primary-dark);
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(79, 124, 255, .4);
        }

        .btn-primary:active {
            transform: translateY(0);
            box-shadow: 0 2px 8px rgba(79, 124, 255, .3);
        }

        .btn-ghost {
            background: #fff;
            color: var(--dark);
            border: 1px solid var(--border);
        }

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

        .btn-outline-light {
            background: transparent;
            border: 1px solid rgba(255, 255, 255, .7);
            color: #fff;
        }

        .btn-outline-light:hover {
            background: rgba(255, 255, 255, .15);
            border-color: #fff;
            transform: translateY(-2px);
        }

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

        .btn-lg {
            padding: 16px 32px;
            font-size: 17px;
            border-radius: 14px;
        }

        /* ========== Hero / Banner ========== */
        .page-hero {
            position: relative;
            padding: 100px 0 80px;
            background: linear-gradient(135deg, #0f172a 0%, #1e2a4a 60%, #28365e 100%);
            overflow: hidden;
            isolation: isolate;
        }

        .page-hero::before {
            content: '';
            position: absolute;
            top: 0;
            right: 0;
            bottom: 0;
            left: 0;
            background-image: url('/assets/images/backpic/back-2.png');
            background-size: cover;
            background-position: center;
            opacity: .18;
            z-index: -1;
        }

        .page-hero::after {
            content: '';
            position: absolute;
            top: -50%;
            right: -30%;
            width: 600px;
            height: 600px;
            background: radial-gradient(circle, rgba(79, 124, 255, .3) 0%, transparent 70%);
            z-index: -1;
        }

        .hero-inner {
            display: flex;
            align-items: center;
            gap: 60px;
            position: relative;
        }

        .hero-content {
            flex: 1.1;
        }

        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: rgba(79, 124, 255, .15);
            border: 1px solid rgba(79, 124, 255, .3);
            padding: 6px 16px;
            border-radius: 100px;
            color: #a8c0ff;
            font-size: 13px;
            font-weight: 600;
            letter-spacing: .5px;
            margin-bottom: 24px;
        }

        .hero-badge i {
            font-size: 13px;
        }

        .page-hero h1 {
            font-size: 52px;
            font-weight: 800;
            line-height: 1.15;
            color: #fff;
            letter-spacing: -1.5px;
            margin-bottom: 20px;
        }

        .page-hero h1 .accent {
            background: linear-gradient(135deg, #7aa2ff, #00c2a8);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }

        .hero-desc {
            font-size: 18px;
            line-height: 1.75;
            color: rgba(255, 255, 255, .8);
            max-width: 580px;
            margin-bottom: 32px;
        }

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

        .hero-stats {
            display: flex;
            gap: 40px;
            margin-top: 48px;
            padding-top: 32px;
            border-top: 1px solid rgba(255, 255, 255, .15);
            flex-wrap: wrap;
        }

        .hero-stat {
            display: flex;
            flex-direction: column;
            gap: 2px;
        }

        .hero-stat strong {
            font-size: 28px;
            font-weight: 800;
            color: #fff;
            letter-spacing: -0.5px;
        }

        .hero-stat span {
            font-size: 14px;
            color: rgba(255, 255, 255, .6);
        }

        .hero-illustration {
            flex: 0.9;
            position: relative;
        }

        .hero-illustration img {
            border-radius: 24px;
            box-shadow: 0 30px 80px rgba(0, 0, 0, .4);
            border: 1px solid rgba(255, 255, 255, .1);
        }

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

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

        .section-head {
            display: flex;
            align-items: flex-end;
            justify-content: space-between;
            gap: 40px;
            margin-bottom: 48px;
        }

        .section-head .eyebrow {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-size: 14px;
            font-weight: 600;
            color: var(--primary);
            background: var(--primary-light);
            padding: 6px 16px;
            border-radius: 100px;
            margin-bottom: 14px;
            letter-spacing: .5px;
        }

        .section-head h2 {
            font-size: 36px;
            font-weight: 800;
            color: var(--dark);
            letter-spacing: -1px;
            line-height: 1.2;
            margin-bottom: 10px;
        }

        .section-head p {
            color: var(--text-muted);
            font-size: 16px;
            max-width: 480px;
        }

        .section-link {
            color: var(--primary);
            font-weight: 600;
            font-size: 15px;
            white-space: nowrap;
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }

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

        .section-link i {
            font-size: 13px;
            transition: transform .2s ease;
        }

        .section-link:hover i {
            transform: translateX(4px);
        }

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

        .feature-card {
            background: #fff;
            border: 1px solid var(--border);
            border-radius: var(--radius-lg);
            padding: 32px;
            transition: all .3s ease;
            position: relative;
            overflow: hidden;
        }

        .feature-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 3px;
            background: linear-gradient(90deg, var(--primary), var(--accent));
            opacity: 0;
            transition: opacity .3s ease;
        }

        .feature-card:hover {
            border-color: transparent;
            box-shadow: var(--shadow-lg);
            transform: translateY(-6px);
        }

        .feature-card:hover::before {
            opacity: 1;
        }

        .feature-icon {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 52px;
            height: 52px;
            border-radius: 14px;
            font-size: 22px;
            margin-bottom: 20px;
            background: var(--primary-light);
            color: var(--primary);
        }

        .feature-card:nth-child(2) .feature-icon {
            background: rgba(0, 194, 168, .1);
            color: var(--accent-dim, #00a894);
        }

        .feature-card:nth-child(3) .feature-icon {
            background: rgba(245, 158, 11, .1);
            color: #f59e0b;
        }

        .feature-card h3 {
            font-size: 20px;
            font-weight: 700;
            color: var(--dark);
            margin-bottom: 10px;
            letter-spacing: -0.2px;
        }

        .feature-card p {
            font-size: 15px;
            color: var(--text-muted);
            line-height: 1.7;
            margin-bottom: 16px;
        }

        .feature-card .card-tag {
            display: inline-flex;
            gap: 8px;
            flex-wrap: wrap;
        }

        .tag {
            display: inline-flex;
            align-items: center;
            gap: 4px;
            background: var(--bg-soft);
            border: 1px solid var(--border);
            border-radius: 100px;
            padding: 4px 12px;
            font-size: 13px;
            font-weight: 500;
            color: var(--text-muted);
            transition: all .2s ease;
        }

        .tag:hover {
            border-color: var(--primary);
            color: var(--primary);
            background: var(--primary-light);
        }

        /* Content cards */
        .content-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
        }

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

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

        .content-card .card-media {
            position: relative;
            height: 200px;
            overflow: hidden;
        }

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

        .content-card:hover .card-media img {
            transform: scale(1.05);
        }

        .content-card .card-media::after {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background: linear-gradient(180deg, transparent 40%, rgba(15, 23, 42, .4) 100%);
        }

        .card-cat {
            position: absolute;
            top: 16px;
            left: 16px;
            z-index: 2;
            background: rgba(255, 255, 255, .92);
            backdrop-filter: blur(8px);
            padding: 5px 14px;
            border-radius: 100px;
            font-size: 13px;
            font-weight: 600;
            color: var(--primary);
            border: 1px solid rgba(79, 124, 255, .15);
        }

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

        .card-body h3 {
            font-size: 18px;
            font-weight: 700;
            color: var(--dark);
            margin-bottom: 10px;
            line-height: 1.4;
        }

        .card-body p {
            font-size: 14px;
            color: var(--text-muted);
            line-height: 1.7;
            flex: 1;
            margin-bottom: 16px;
        }

        .card-meta {
            display: flex;
            align-items: center;
            justify-content: space-between;
            border-top: 1px solid var(--border);
            padding-top: 16px;
            font-size: 13px;
            color: var(--text-muted);
        }

        .card-meta .read-more {
            color: var(--primary);
            font-weight: 600;
            font-size: 14px;
        }

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

        .step-item {
            position: relative;
            padding: 32px 24px;
            background: #fff;
            border: 1px solid var(--border);
            border-radius: var(--radius-lg);
            text-align: center;
            transition: all .3s ease;
        }

        .step-item:hover {
            box-shadow: var(--shadow-md);
            border-color: transparent;
            transform: translateY(-4px);
        }

        .step-num {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 48px;
            height: 48px;
            border-radius: 50%;
            background: linear-gradient(135deg, var(--primary), #7aa2ff);
            color: #fff;
            font-size: 19px;
            font-weight: 800;
            margin-bottom: 18px;
            box-shadow: 0 6px 18px rgba(79, 124, 255, .3);
        }

        .step-item h4 {
            font-size: 17px;
            font-weight: 700;
            color: var(--dark);
            margin-bottom: 8px;
        }

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

        /* ========== Stats band ========== */
        .stats-band {
            background: linear-gradient(135deg, #0f172a, #1e2a4a, #0f172a);
            border-radius: 28px;
            padding: 56px 48px;
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 32px;
            position: relative;
            overflow: hidden;
        }

        .stats-band::before {
            content: '';
            position: absolute;
            top: 0;
            right: 0;
            bottom: 0;
            left: 0;
            background-image: url('/assets/images/backpic/back-3.png');
            background-size: cover;
            background-position: center;
            opacity: .1;
        }

        .stat-item {
            text-align: center;
            position: relative;
            z-index: 1;
        }

        .stat-item .stat-value {
            font-size: 44px;
            font-weight: 800;
            color: #fff;
            letter-spacing: -1px;
            line-height: 1.2;
        }

        .stat-item .stat-label {
            font-size: 14px;
            color: rgba(255, 255, 255, .7);
            margin-top: 6px;
        }

        /* ========== FAQ ========== */
        .faq-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 20px;
        }

        .faq-item {
            background: #fff;
            border: 1px solid var(--border);
            border-radius: var(--radius-md);
            padding: 28px;
            transition: all .2s ease;
        }

        .faq-item:hover {
            border-color: rgba(79, 124, 255, .3);
            box-shadow: var(--shadow-sm);
        }

        .faq-item h4 {
            font-size: 17px;
            font-weight: 700;
            color: var(--dark);
            margin-bottom: 10px;
            display: flex;
            align-items: center;
            gap: 10px;
        }

        .faq-item h4 .faq-icon {
            width: 28px;
            height: 28px;
            border-radius: 8px;
            background: var(--primary-light);
            color: var(--primary);
            display: inline-flex;
            align-items: center;
            justify-content: center;
            font-size: 13px;
            flex-shrink: 0;
        }

        .faq-item p {
            font-size: 15px;
            color: var(--text-muted);
            line-height: 1.7;
            padding-left: 38px;
        }

        /* ========== CTA ========== */
        .cta-section {
            background: linear-gradient(135deg, #0f172a, #1e2a4a);
            border-radius: 28px;
            padding: 64px 56px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 40px;
            position: relative;
            overflow: hidden;
        }

        .cta-section::before {
            content: '';
            position: absolute;
            top: 0;
            right: 0;
            bottom: 0;
            left: 0;
            background-image: url('/assets/images/backpic/back-1.png');
            background-size: cover;
            background-position: center;
            opacity: .15;
        }

        .cta-content {
            position: relative;
            z-index: 1;
        }

        .cta-content h2 {
            font-size: 32px;
            font-weight: 800;
            color: #fff;
            letter-spacing: -0.8px;
            margin-bottom: 12px;
        }

        .cta-content p {
            font-size: 16px;
            color: rgba(255, 255, 255, .75);
            line-height: 1.7;
            max-width: 520px;
        }

        .cta-actions {
            display: flex;
            gap: 14px;
            flex-shrink: 0;
            position: relative;
            z-index: 1;
            flex-wrap: wrap;
        }

        /* ========== Footer ========== */
        .site-footer {
            background: #0b1120;
            color: #94a3b8;
            padding: 72px 0 32px;
            margin-top: 0;
        }

        .footer-top {
            display: grid;
            grid-template-columns: 1.2fr 2fr;
            gap: 64px;
            padding-bottom: 48px;
            border-bottom: 1px solid rgba(255, 255, 255, .08);
        }

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

        .footer-brand p {
            font-size: 15px;
            line-height: 1.7;
            margin-top: 18px;
            max-width: 340px;
            color: #64748b;
        }

        .footer-nav {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 32px;
        }

        .footer-col h4 {
            font-size: 15px;
            font-weight: 600;
            color: #e2e8f0;
            margin-bottom: 20px;
            letter-spacing: .5px;
        }

        .footer-col a {
            display: block;
            font-size: 14px;
            color: #64748b;
            margin-bottom: 12px;
            transition: all .2s ease;
        }

        .footer-col a:hover {
            color: var(--primary);
            padding-left: 4px;
        }

        .footer-note {
            font-size: 14px;
            color: #64748b;
            line-height: 1.7;
        }

        .footer-bottom {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding-top: 28px;
            font-size: 13px;
            color: #475569;
            flex-wrap: wrap;
            gap: 12px;
        }

        .footer-bottom p {
            margin: 0;
        }

        /* ========== Responsive ========== */
        @media (max-width: 1024px) {
            .container {
                padding: 0 24px;
            }

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

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

            .stats-band {
                grid-template-columns: repeat(2, 1fr);
                padding: 48px 32px;
            }

            .hero-inner {
                gap: 40px;
            }

            .hero-illustration {
                display: none;
            }

            .page-hero h1 {
                font-size: 40px;
            }

            .footer-top {
                grid-template-columns: 1fr;
                gap: 40px;
            }

            .search-box {
                display: none;
            }
        }

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

            .container {
                padding: 0 20px;
            }

            .site-header .nav-cta {
                display: none;
            }

            .nav-toggle {
                display: flex;
            }

            .site-nav {
                position: fixed;
                top: 72px;
                left: 0;
                right: 0;
                background: #fff;
                border-bottom: 1px solid var(--border);
                flex-direction: column;
                align-items: stretch;
                padding: 16px 20px 24px;
                gap: 4px;
                box-shadow: 0 20px 40px rgba(15, 23, 42, .08);
                transform: translateY(-120%);
                transition: transform .35s ease;
                z-index: 99;
            }

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

            .nav-link {
                padding: 12px 14px;
            }

            .nav-mobile-actions {
                display: flex;
                padding-top: 12px;
                margin-top: 8px;
                border-top: 1px solid var(--border);
            }

            .nav-mobile-actions .btn {
                width: 100%;
            }

            .section-head {
                flex-direction: column;
                align-items: flex-start;
                gap: 16px;
                margin-bottom: 32px;
            }

            .section-head h2 {
                font-size: 28px;
            }

            .feature-grid,
            .content-grid,
            .faq-grid {
                grid-template-columns: 1fr;
            }

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

            .stats-band {
                grid-template-columns: 1fr;
                padding: 40px 28px;
            }

            .stat-item .stat-value {
                font-size: 36px;
            }

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

            .page-hero h1 {
                font-size: 32px;
            }

            .hero-desc {
                font-size: 16px;
            }

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

            .hero-stats {
                gap: 24px;
            }

            .cta-section {
                flex-direction: column;
                padding: 48px 32px;
                text-align: center;
            }

            .cta-actions {
                justify-content: center;
            }

            .footer-nav {
                grid-template-columns: repeat(2, 1fr);
                gap: 24px;
            }

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

        @media (max-width: 520px) {
            .container {
                padding: 0 16px;
            }

            .header-inner {
                gap: 12px;
            }

            .logo-text {
                font-size: 15px;
            }

            .logo-mark {
                width: 34px;
                height: 34px;
                font-size: 16px;
            }

            .page-hero h1 {
                font-size: 26px;
            }

            .hero-stats {
                flex-direction: column;
                gap: 16px;
            }

            .hero-stat strong {
                font-size: 24px;
            }

            .feature-card {
                padding: 24px;
            }

            .content-card .card-media {
                height: 180px;
            }

            .stats-band {
                padding: 32px 20px;
            }

            .cta-section {
                padding: 40px 20px;
            }

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

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

            .footer-top {
                gap: 32px;
            }
        }

/* roulang page: article */
:root {
    --primary: #4F46E5;
    --primary-dark: #4338CA;
    --primary-light: #818CF8;
    --accent: #F59E0B;
    --accent-dark: #D97706;
    --bg-surface: #F8FAFC;
    --bg-white: #FFFFFF;
    --text-main: #1E293B;
    --text-muted: #64748B;
    --border-light: #E2E8F0;
    --radius-lg: 16px;
    --radius-md: 12px;
    --shadow-sm: 0 1px 3px rgba(0,0,0,0.06);
    --shadow-md: 0 8px 24px rgba(0,0,0,0.08);
    --shadow-lg: 0 16px 48px rgba(0,0,0,0.12);
}
* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { font-family: -apple-system, BlinkMacSystemFont, 'PingFang SC', 'Noto Sans SC', 'Microsoft YaHei', 'sans-serif'; color: var(--text-main); background: var(--bg-white); line-height: 1.75; }
img { max-width: 100%; height: auto; display: block; }
a { text-decoration: none; color: inherit; transition: all 0.25s ease; }
ul, ol { list-style: none; }
.container { max-width: 1240px; margin: 0 auto; padding: 0 24px; }
@media (max-width: 640px) { .container { padding: 0 16px; } }
.site-header { position: sticky; top: 0; z-index: 100; background: rgba(255,255,255,0.92); backdrop-filter: blur(12px); border-bottom: 1px solid var(--border-light); }
.header-inner { display: flex; align-items: center; justify-content: space-between; height: 72px; gap: 24px; }
.logo { display: flex; align-items: center; gap: 10px; flex-shrink: 0; }
.logo-mark { width: 36px; height: 36px; border-radius: 10px; background: linear-gradient(135deg, #4F46E5, #7C3AED); color: #fff; display: flex; align-items: center; justify-content: center; font-weight: 800; font-size: 18px; box-shadow: 0 4px 12px rgba(79,70,229,0.3); }
.logo-text { font-weight: 700; font-size: 20px; letter-spacing: -0.02em; color: var(--text-main); }
.site-nav { display: flex; align-items: center; gap: 32px; }
.nav-link { font-size: 15px; font-weight: 500; color: var(--text-muted); padding: 8px 4px; position: relative; }
.nav-link::after { content: ''; position: absolute; left: 0; bottom: 0; width: 0; height: 2px; background: var(--primary); border-radius: 2px; transition: width 0.3s ease; }
.nav-link:hover { color: var(--text-main); }
.nav-link:hover::after { width: 100%; }
.nav-link.active { color: var(--primary); font-weight: 600; }
.nav-link.active::after { width: 100%; }
.nav-actions { display: flex; align-items: center; gap: 16px; }
.search-box { display: flex; align-items: center; gap: 8px; background: var(--bg-surface); border: 1px solid var(--border-light); border-radius: 10px; padding: 8px 14px; width: 220px; transition: border-color 0.2s, box-shadow 0.2s; }
.search-box:focus-within { border-color: var(--primary-light); box-shadow: 0 0 0 3px rgba(79,70,229,0.1); }
.search-icon { width: 16px; height: 16px; color: var(--text-muted); flex-shrink: 0; }
.search-box input { border: none; outline: none; background: transparent; font-size: 14px; color: var(--text-main); width: 100%; }
.search-box kbd { background: #f1f5f9; border: 1px solid #e2e8f0; border-radius: 4px; padding: 2px 6px; font-size: 11px; color: var(--text-muted); white-space: nowrap; }
.btn { display: inline-flex; align-items: center; justify-content: center; gap: 8px; font-weight: 600; border-radius: 10px; padding: 12px 24px; font-size: 15px; border: none; cursor: pointer; transition: all 0.25s ease; }
.btn-primary { background: var(--primary); color: #fff; box-shadow: 0 4px 14px rgba(79,70,229,0.25); }
.btn-primary:hover { background: var(--primary-dark); transform: translateY(-2px); box-shadow: 0 8px 24px rgba(79,70,229,0.35); }
.btn-primary:active { transform: translateY(0); box-shadow: 0 2px 8px rgba(79,70,229,0.2); }
.btn-outline { background: transparent; border: 1px solid var(--border-light); color: var(--text-main); }
.btn-outline:hover { border-color: var(--primary); color: var(--primary); background: rgba(79,70,229,0.04); }
.btn-sm { padding: 8px 16px; font-size: 14px; border-radius: 8px; }
.nav-toggle { display: none; flex-direction: column; gap: 5px; background: none; border: none; cursor: pointer; padding: 6px; }
.nav-toggle span { display: block; width: 22px; height: 2px; background: var(--text-main); border-radius: 2px; transition: all 0.3s ease; }
.nav-mobile-actions { display: none; }
@media (max-width: 1024px) { .search-box { display: none; } .site-nav { position: fixed; top: 72px; left: 0; right: 0; background: #fff; border-bottom: 1px solid var(--border-light); flex-direction: column; gap: 0; max-height: 0; overflow: hidden; transition: max-height 0.4s ease; padding: 0; } .site-nav.open { max-height: 400px; padding: 16px 24px 24px; } .site-nav .nav-link { width: 100%; padding: 14px 0; border-bottom: 1px solid var(--border-light); } .nav-mobile-actions { display: flex; padding-top: 16px; } .nav-toggle { display: flex; } .nav-cta { display: none; } }
.article-hero { position: relative; background-image: linear-gradient(rgba(15,23,42,0.82), rgba(15,23,42,0.76)), url('/assets/images/backpic/back-2.png'); background-size: cover; background-position: center; padding: 96px 0 72px; color: #fff; }
.article-hero .breadcrumb { display: flex; align-items: center; gap: 8px; font-size: 13px; color: rgba(255,255,255,0.7); margin-bottom: 20px; flex-wrap: wrap; }
.article-hero .breadcrumb a { color: rgba(255,255,255,0.8); }
.article-hero .breadcrumb a:hover { color: #fff; }
.article-hero .breadcrumb .sep { opacity: 0.5; }
.article-hero h1 { font-size: clamp(28px, 4vw, 42px); font-weight: 800; line-height: 1.3; margin-bottom: 18px; max-width: 860px; letter-spacing: -0.01em; }
.article-hero .article-hero-meta { display: flex; align-items: center; gap: 20px; flex-wrap: wrap; font-size: 14px; color: rgba(255,255,255,0.8); }
.article-hero .hero-tag { display: inline-flex; align-items: center; gap: 6px; background: rgba(255,255,255,0.15); border: 1px solid rgba(255,255,255,0.2); border-radius: 20px; padding: 4px 14px; font-size: 13px; color: #fff; }
.article-hero .hero-tag i { font-size: 12px; }
@media (max-width: 768px) { .article-hero { padding: 64px 0 48px; } }
.article-main { padding: 64px 0 72px; background: var(--bg-surface); }
.article-grid { display: grid; grid-template-columns: minmax(0, 1fr) 340px; gap: 48px; align-items: start; }
@media (max-width: 1024px) { .article-grid { grid-template-columns: 1fr; } }
.article-content-card { background: #fff; border-radius: var(--radius-lg); padding: 40px 44px; box-shadow: var(--shadow-sm); border: 1px solid rgba(0,0,0,0.04); }
@media (max-width: 768px) { .article-content-card { padding: 24px 20px; } }
.article-meta-bar { display: flex; align-items: center; gap: 16px; flex-wrap: wrap; border-bottom: 1px solid var(--border-light); padding-bottom: 20px; margin-bottom: 28px; }
.article-meta-bar .meta-item { display: flex; align-items: center; gap: 6px; font-size: 13px; color: var(--text-muted); }
.article-meta-bar .meta-item i { font-size: 14px; color: var(--primary); }
.article-meta-bar .badge { background: rgba(79,70,229,0.08); color: var(--primary); border-radius: 20px; padding: 2px 12px; font-size: 13px; font-weight: 500; }
.article-body { font-size: 16px; line-height: 1.9; color: #334155; }
.article-body p { margin-bottom: 1.5em; }
.article-body h2 { font-size: 24px; font-weight: 700; color: var(--text-main); margin: 1.8em 0 0.8em; }
.article-body h3 { font-size: 20px; font-weight: 600; color: var(--text-main); margin: 1.5em 0 0.6em; }
.article-body img { border-radius: var(--radius-md); margin: 24px 0; box-shadow: var(--shadow-sm); }
.article-body blockquote { border-left: 4px solid var(--primary); background: var(--bg-surface); padding: 16px 20px; border-radius: 0 8px 8px 0; margin: 24px 0; color: var(--text-muted); }
.article-body ul, .article-body ol { padding-left: 1.4em; margin-bottom: 1.5em; }
.article-body ul li { list-style: disc; margin-bottom: 0.4em; }
.article-body ol li { list-style: decimal; margin-bottom: 0.4em; }
.article-body a { color: var(--primary); border-bottom: 1px solid rgba(79,70,229,0.3); }
.article-body a:hover { color: var(--primary-dark); border-bottom-color: var(--primary); }
.article-tags { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 36px; padding-top: 24px; border-top: 1px solid var(--border-light); }
.article-tag { display: inline-flex; align-items: center; gap: 4px; background: var(--bg-surface); border: 1px solid var(--border-light); border-radius: 20px; padding: 6px 14px; font-size: 13px; color: var(--text-muted); transition: all 0.2s; }
.article-tag:hover { background: rgba(79,70,229,0.06); border-color: var(--primary-light); color: var(--primary); }
.share-bar { display: flex; align-items: center; gap: 12px; margin-top: 20px; padding-top: 20px; border-top: 1px solid var(--border-light); }
.share-bar span { font-size: 14px; color: var(--text-muted); }
.share-btn { width: 36px; height: 36px; border-radius: 8px; border: 1px solid var(--border-light); display: flex; align-items: center; justify-content: center; color: var(--text-muted); transition: all 0.2s; }
.share-btn:hover { background: var(--primary); color: #fff; border-color: var(--primary); }
.sidebar-card { background: #fff; border-radius: var(--radius-lg); padding: 28px; box-shadow: var(--shadow-sm); border: 1px solid rgba(0,0,0,0.04); margin-bottom: 24px; }
.sidebar-card h3 { font-size: 16px; font-weight: 700; margin-bottom: 16px; color: var(--text-main); position: relative; padding-left: 14px; }
.sidebar-card h3::before { content: ''; position: absolute; left: 0; top: 3px; bottom: 3px; width: 4px; border-radius: 2px; background: var(--primary); }
.sidebar-info-list li { display: flex; align-items: center; justify-content: space-between; padding: 10px 0; border-bottom: 1px solid var(--border-light); font-size: 14px; }
.sidebar-info-list li:last-child { border-bottom: none; }
.sidebar-info-list .label { color: var(--text-muted); }
.sidebar-info-list .value { font-weight: 500; color: var(--text-main); }
.sidebar-img { border-radius: var(--radius-md); overflow: hidden; position: relative; margin-bottom: 16px; }
.sidebar-img img { width: 100%; height: 160px; object-fit: cover; transition: transform 0.5s ease; }
.sidebar-img:hover img { transform: scale(1.05); }
.sidebar-img .img-caption { position: absolute; bottom: 0; left: 0; right: 0; background: linear-gradient(to top, rgba(0,0,0,0.7), transparent); color: #fff; font-size: 13px; padding: 24px 14px 10px; }
.sidebar-links li { margin-bottom: 10px; }
.sidebar-links a { display: flex; align-items: center; justify-content: space-between; padding: 10px 14px; border-radius: 8px; background: var(--bg-surface); font-size: 14px; color: var(--text-main); transition: all 0.2s; }
.sidebar-links a:hover { background: rgba(79,70,229,0.06); color: var(--primary); transform: translateX(4px); }
.sidebar-links a i { font-size: 12px; color: var(--text-muted); transition: color 0.2s; }
.sidebar-links a:hover i { color: var(--primary); }
.not-found-card { background: #fff; border-radius: var(--radius-lg); padding: 60px 40px; text-align: center; box-shadow: var(--shadow-sm); }
.not-found-card .not-found-icon { width: 72px; height: 72px; border-radius: 50%; background: rgba(79,70,229,0.08); display: flex; align-items: center; justify-content: center; margin: 0 auto 20px; }
.not-found-card .not-found-icon i { font-size: 28px; color: var(--primary); }
.not-found-card h2 { font-size: 24px; font-weight: 700; margin-bottom: 10px; }
.not-found-card p { color: var(--text-muted); margin-bottom: 24px; }
.related-section { padding: 72px 0; background: #fff; }
.section-heading { text-align: center; margin-bottom: 44px; }
.section-heading .section-tag { display: inline-block; background: rgba(79,70,229,0.08); color: var(--primary); font-size: 13px; font-weight: 600; padding: 4px 14px; border-radius: 20px; margin-bottom: 12px; }
.section-heading h2 { font-size: 30px; font-weight: 800; color: var(--text-main); letter-spacing: -0.02em; }
.section-heading p { color: var(--text-muted); font-size: 15px; max-width: 560px; margin: 10px auto 0; }
.related-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }
@media (max-width: 1024px) { .related-grid { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 640px) { .related-grid { grid-template-columns: 1fr; } }
.related-card { background: #fff; border: 1px solid var(--border-light); border-radius: var(--radius-lg); overflow: hidden; transition: all 0.3s ease; box-shadow: var(--shadow-sm); }
.related-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-lg); border-color: rgba(79,70,229,0.2); }
.related-card .card-img { height: 160px; overflow: hidden; position: relative; }
.related-card .card-img img { width: 100%; height: 100%; object-fit: cover; transition: transform 0.5s ease; }
.related-card:hover .card-img img { transform: scale(1.06); }
.related-card .card-body { padding: 20px; }
.related-card .card-cat { display: inline-block; background: rgba(79,70,229,0.08); color: var(--primary); font-size: 12px; font-weight: 500; border-radius: 12px; padding: 2px 10px; margin-bottom: 10px; }
.related-card .card-title { font-size: 16px; font-weight: 600; line-height: 1.4; margin-bottom: 8px; color: var(--text-main); display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
.related-card .card-title:hover { color: var(--primary); }
.related-card .card-date { font-size: 13px; color: var(--text-muted); display: flex; align-items: center; gap: 6px; }
.cta-section { position: relative; background: linear-gradient(135deg, #1E1B4B 0%, #312E81 60%, #4338CA 100%); padding: 80px 0; color: #fff; text-align: center; overflow: hidden; }
.cta-section::before { content: ''; position: absolute; inset: 0; background-image: url('/assets/images/backpic/back-3.png'); background-size: cover; background-position: center; opacity: 0.2; }
.cta-section .container { position: relative; z-index: 1; }
.cta-section h2 { font-size: 32px; font-weight: 800; margin-bottom: 14px; }
.cta-section p { font-size: 16px; color: rgba(255,255,255,0.85); max-width: 560px; margin: 0 auto 32px; }
.cta-actions { display: flex; justify-content: center; gap: 16px; flex-wrap: wrap; }
.cta-section .btn-primary { background: var(--accent); color: #1E1B4B; box-shadow: 0 4px 20px rgba(245,158,11,0.35); }
.cta-section .btn-primary:hover { background: #FBBF24; box-shadow: 0 8px 28px rgba(245,158,11,0.45); }
.cta-section .btn-outline { border-color: rgba(255,255,255,0.3); color: #fff; }
.cta-section .btn-outline:hover { border-color: #fff; background: rgba(255,255,255,0.1); }
.faq-section { padding: 72px 0; background: var(--bg-surface); }
.faq-list { max-width: 800px; margin: 0 auto; display: flex; flex-direction: column; gap: 14px; }
.faq-item { background: #fff; border: 1px solid var(--border-light); border-radius: var(--radius-md); overflow: hidden; transition: all 0.3s ease; }
.faq-item:hover { border-color: rgba(79,70,229,0.15); box-shadow: var(--shadow-sm); }
.faq-question { width: 100%; text-align: left; padding: 18px 22px; background: none; border: none; font-size: 15px; font-weight: 600; color: var(--text-main); cursor: pointer; display: flex; justify-content: space-between; align-items: center; transition: color 0.2s; }
.faq-question:hover { color: var(--primary); }
.faq-question i { font-size: 14px; color: var(--text-muted); transition: transform 0.3s; }
.faq-item.active .faq-question i { transform: rotate(180deg); color: var(--primary); }
.faq-answer { max-height: 0; overflow: hidden; transition: max-height 0.4s ease; padding: 0 22px; color: var(--text-muted); font-size: 14px; line-height: 1.8; }
.faq-item.active .faq-answer { max-height: 200px; padding-bottom: 18px; }
.site-footer { background: #1E293B; color: #CBD5E1; padding: 64px 0 0; }
.footer-top { display: grid; grid-template-columns: 1.2fr 2fr; gap: 48px; padding-bottom: 40px; border-bottom: 1px solid rgba(255,255,255,0.08); }
@media (max-width: 768px) { .footer-top { grid-template-columns: 1fr; gap: 32px; } }
.footer-brand p { font-size: 14px; line-height: 1.7; color: #94A3B8; margin-top: 16px; max-width: 360px; }
.logo-footer .logo-mark { background: linear-gradient(135deg, #818CF8, #F59E0B); }
.logo-footer .logo-text { color: #fff; }
.footer-nav { display: grid; grid-template-columns: repeat(3, 1fr); gap: 32px; }
@media (max-width: 640px) { .footer-nav { grid-template-columns: 1fr 1fr; } }
.footer-col h4 { font-size: 15px; font-weight: 600; color: #fff; margin-bottom: 16px; }
.footer-col a { display: block; font-size: 14px; color: #94A3B8; padding: 5px 0; transition: color 0.2s, padding-left 0.2s; }
.footer-col a:hover { color: #fff; padding-left: 6px; }
.footer-col .footer-note { font-size: 13px; color: #94A3B8; line-height: 1.6; }
.footer-bottom { display: flex; justify-content: space-between; align-items: center; padding: 20px 0; font-size: 13px; color: #64748B; flex-wrap: wrap; gap: 8px; }
@media (max-width: 640px) { .footer-bottom { flex-direction: column; text-align: center; } }
@media (max-width: 640px) { .header-inner { gap: 12px; } .logo-text { font-size: 16px; } .footer-nav { grid-template-columns: 1fr 1fr; } }

/* roulang page: category2 */
:root {
    --primary: #6366f1;
    --primary-dark: #4f46e5;
    --primary-light: #a5b4fc;
    --accent: #f59e0b;
    --accent-light: #fbbf24;
    --deep: #0f172a;
    --surface: #f8fafc;
    --line: #e2e8f0;
    --radius: 16px;
    --radius-sm: 10px;
    --shadow-card: 0 1px 3px rgba(0,0,0,0.06), 0 4px 16px rgba(0,0,0,0.04);
    --shadow-card-hover: 0 4px 12px rgba(0,0,0,0.08), 0 12px 32px rgba(0,0,0,0.06);
  }
  * {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
  }
  html {
    scroll-behavior: smooth;
  }
  body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', sans-serif;
    background: #ffffff;
    color: #0f172a;
    line-height: 1.7;
    -webkit-font-smoothing: antialiased;
  }
  a {
    text-decoration: none;
    color: inherit;
    transition: color 0.2s ease;
  }
  img {
    max-width: 100%;
    height: auto;
    display: block;
  }
  button, input {
    font-family: inherit;
  }
  .container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
  }
  /* ===== Header / Nav ===== */
  .site-header {
    position: sticky;
    top: 0;
    z-index: 100;
    background: rgba(255,255,255,0.92);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--line);
    transition: box-shadow 0.3s ease;
  }
  .site-header.scrolled {
    box-shadow: 0 4px 20px rgba(0,0,0,0.06);
  }
  .header-inner {
    display: flex;
    align-items: center;
    height: 72px;
    gap: 32px;
  }
  .logo {
    display: flex;
    align-items: center;
    gap: 10px;
    flex-shrink: 0;
  }
  .logo-mark {
    width: 38px;
    height: 38px;
    border-radius: 10px;
    background: linear-gradient(135deg, #6366f1 0%, #8b5cf6 100%);
    color: #fff;
    font-weight: 800;
    font-size: 19px;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 4px 12px rgba(99,102,241,0.3);
  }
  .logo-text {
    font-size: 19px;
    font-weight: 800;
    color: #0f172a;
    letter-spacing: -0.02em;
  }
  .site-nav {
    display: flex;
    align-items: center;
    gap: 4px;
    flex: 1;
  }
  .site-nav .nav-link {
    padding: 8px 16px;
    border-radius: 8px;
    font-size: 14px;
    font-weight: 500;
    color: #334155;
    transition: all 0.2s ease;
  }
  .site-nav .nav-link:hover {
    color: var(--primary);
    background: rgba(99,102,241,0.08);
  }
  .site-nav .nav-link.active {
    color: var(--primary-dark);
    background: rgba(99,102,241,0.1);
    font-weight: 600;
  }
  .nav-actions {
    display: flex;
    align-items: center;
    gap: 12px;
    flex-shrink: 0;
  }
  .search-box {
    display: flex;
    align-items: center;
    gap: 8px;
    background: var(--surface);
    border: 1px solid var(--line);
    border-radius: 10px;
    padding: 7px 12px;
    width: 220px;
    transition: all 0.2s ease;
  }
  .search-box:focus-within {
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(99,102,241,0.12);
    background: #fff;
  }
  .search-box .search-icon {
    width: 16px;
    height: 16px;
    color: #94a3b8;
    flex-shrink: 0;
  }
  .search-box input {
    border: none;
    outline: none;
    background: transparent;
    font-size: 13px;
    color: #0f172a;
    width: 100%;
  }
  .search-box kbd {
    font-size: 10px;
    background: #edf2f7;
    border: 1px solid var(--line);
    border-radius: 4px;
    padding: 2px 6px;
    color: #64748b;
    flex-shrink: 0;
  }
  .btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    font-weight: 600;
    border-radius: 10px;
    padding: 10px 22px;
    font-size: 14px;
    cursor: pointer;
    border: none;
    transition: all 0.25s ease;
    line-height: 1.5;
  }
  .btn-primary {
    background: linear-gradient(135deg, #6366f1, #8b5cf6);
    color: #fff;
    box-shadow: 0 4px 14px rgba(99,102,241,0.3);
  }
  .btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(99,102,241,0.35);
  }
  .btn-primary:active {
    transform: translateY(0);
  }
  .btn-sm {
    padding: 8px 16px;
    font-size: 13px;
    border-radius: 8px;
  }
  .nav-cta {
    display: inline-flex;
  }
  .nav-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 6px;
  }
  .nav-toggle span {
    width: 22px;
    height: 2px;
    background: #334155;
    border-radius: 2px;
    transition: all 0.3s ease;
  }
  .nav-mobile-actions {
    display: none;
  }
  /* ===== Hero ===== */
  .page-hero {
    position: relative;
    padding: 100px 0 72px;
    background: linear-gradient(135deg, #0f172a 0%, #1e1b4b 50%, #312e81 100%);
    overflow: hidden;
  }
  .page-hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-image: url('/assets/images/backpic/back-2.png');
    background-size: cover;
    background-position: center;
    opacity: 0.18;
  }
  .page-hero::after {
    content: '';
    position: absolute;
    bottom: -40%;
    right: -10%;
    width: 500px;
    height: 500px;
    border-radius: 50%;
    background: radial-gradient(circle, rgba(99,102,241,0.25) 0%, transparent 70%);
  }
  .page-hero .container {
    position: relative;
    z-index: 2;
  }
  .hero-tag {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background: rgba(99,102,241,0.2);
    border: 1px solid rgba(165,180,252,0.3);
    color: #c7d2fe;
    font-size: 13px;
    padding: 6px 14px;
    border-radius: 100px;
    margin-bottom: 20px;
  }
  .hero-title {
    font-size: 42px;
    line-height: 1.2;
    font-weight: 800;
    color: #fff;
    margin-bottom: 16px;
    letter-spacing: -0.02em;
    max-width: 640px;
  }
  .hero-title span {
    background: linear-gradient(120deg, #a5b4fc, #fbbf24);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
  }
  .hero-desc {
    color: #cbd5e1;
    font-size: 17px;
    line-height: 1.8;
    margin-bottom: 32px;
    max-width: 600px;
  }
  .hero-actions {
    display: flex;
    gap: 14px;
    flex-wrap: wrap;
  }
  .btn-light {
    background: rgba(255,255,255,0.12);
    color: #fff;
    border: 1px solid rgba(255,255,255,0.2);
    backdrop-filter: blur(8px);
  }
  .btn-light:hover {
    background: rgba(255,255,255,0.2);
    transform: translateY(-2px);
  }
  .hero-stats {
    display: flex;
    gap: 36px;
    margin-top: 48px;
    padding-top: 32px;
    border-top: 1px solid rgba(255,255,255,0.1);
  }
  .hero-stat {
    display: flex;
    flex-direction: column;
    gap: 4px;
  }
  .hero-stat strong {
    font-size: 28px;
    font-weight: 800;
    color: #fff;
  }
  .hero-stat span {
    font-size: 13px;
    color: #94a3b8;
  }
  /* ===== Section styles ===== */
  .section {
    padding: 80px 0;
  }
  .section-alt {
    background: var(--surface);
  }
  .section-head {
    display: flex;
    align-items: flex-end;
    justify-content: space-between;
    gap: 24px;
    margin-bottom: 44px;
    flex-wrap: wrap;
  }
  .section-label {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    font-size: 13px;
    font-weight: 600;
    color: var(--primary);
    background: rgba(99,102,241,0.1);
    padding: 6px 14px;
    border-radius: 100px;
    margin-bottom: 12px;
  }
  .section-title {
    font-size: 30px;
    font-weight: 800;
    line-height: 1.3;
    color: #0f172a;
    letter-spacing: -0.02em;
  }
  .section-sub {
    font-size: 15px;
    color: #64748b;
    max-width: 480px;
  }
  /* ===== Tag filter ===== */
  .tag-filter {
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
    margin-bottom: 36px;
  }
  .tag-filter button {
    padding: 8px 20px;
    border-radius: 100px;
    font-size: 13px;
    font-weight: 500;
    border: 1px solid var(--line);
    background: #fff;
    color: #475569;
    cursor: pointer;
    transition: all 0.2s ease;
  }
  .tag-filter button:hover {
    border-color: var(--primary);
    color: var(--primary);
    background: rgba(99,102,241,0.06);
  }
  .tag-filter button.active {
    border-color: var(--primary);
    background: var(--primary);
    color: #fff;
    box-shadow: 0 4px 12px rgba(99,102,241,0.25);
  }
  /* ===== Cards grid ===== */
  .cards-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
  }
  .exp-card {
    background: #fff;
    border: 1px solid var(--line);
    border-radius: var(--radius);
    overflow: hidden;
    transition: all 0.3s ease;
    box-shadow: var(--shadow-card);
    display: flex;
    flex-direction: column;
  }
  .exp-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-card-hover);
    border-color: rgba(99,102,241,0.3);
  }
  .exp-card-image {
    position: relative;
    height: 200px;
    overflow: hidden;
  }
  .exp-card-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.4s ease;
  }
  .exp-card:hover .exp-card-image img {
    transform: scale(1.05);
  }
  .exp-card-badge {
    position: absolute;
    top: 14px;
    left: 14px;
    background: rgba(255,255,255,0.92);
    backdrop-filter: blur(8px);
    color: #0f172a;
    font-size: 12px;
    font-weight: 600;
    padding: 5px 12px;
    border-radius: 100px;
    box-shadow: 0 2px 8px rgba(0,0,0,0.08);
  }
  .exp-card-body {
    padding: 22px;
    display: flex;
    flex-direction: column;
    flex: 1;
  }
  .exp-card-body h3 {
    font-size: 16px;
    font-weight: 700;
    color: #0f172a;
    margin-bottom: 8px;
    line-height: 1.5;
  }
  .exp-card-body p {
    font-size: 14px;
    color: #64748b;
    line-height: 1.7;
    flex: 1;
  }
  .exp-card-footer {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding-top: 16px;
    margin-top: 16px;
    border-top: 1px solid #f1f5f9;
  }
  .exp-card-meta {
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: 12px;
    color: #94a3b8;
  }
  .exp-card-link {
    font-size: 13px;
    font-weight: 600;
    color: var(--primary);
    display: inline-flex;
    align-items: center;
    gap: 6px;
  }
  .exp-card-link:hover {
    gap: 10px;
  }
  /* ===== Steps / Process ===== */
  .steps-section {
    background: linear-gradient(160deg, #f8fafc 0%, #eef2ff 50%, #f8fafc 100%);
  }
  .steps-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 28px;
    counter-reset: step;
  }
  .step-card {
    position: relative;
    background: #fff;
    border-radius: var(--radius);
    padding: 32px 26px;
    border: 1px solid var(--line);
    box-shadow: var(--shadow-card);
    transition: all 0.3s ease;
  }
  .step-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-card-hover);
  }
  .step-card::before {
    counter-increment: step;
    content: counter(step, decimal-leading-zero);
    font-size: 48px;
    font-weight: 800;
    line-height: 1;
    background: linear-gradient(135deg, rgba(99,102,241,0.15), rgba(139,92,246,0.15));
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    display: block;
    margin-bottom: 16px;
  }
  .step-card h3 {
    font-size: 17px;
    font-weight: 700;
    color: #0f172a;
    margin-bottom: 10px;
  }
  .step-card p {
    font-size: 14px;
    color: #64748b;
    line-height: 1.7;
  }
  .step-arrow {
    position: absolute;
    top: 50%;
    right: -18px;
    transform: translateY(-50%);
    width: 36px;
    height: 36px;
    border-radius: 50%;
    background: #fff;
    border: 1px solid var(--line);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--primary);
    font-size: 13px;
    box-shadow: 0 2px 8px rgba(0,0,0,0.06);
    z-index: 2;
  }
  /* ===== Featured split ===== */
  .featured-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 48px;
    align-items: center;
  }
  .featured-image {
    position: relative;
    border-radius: var(--radius);
    overflow: hidden;
    box-shadow: var(--shadow-card-hover);
  }
  .featured-image img {
    width: 100%;
    height: 400px;
    object-fit: cover;
  }
  .featured-image .play-btn {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 68px;
    height: 68px;
    border-radius: 50%;
    background: rgba(255,255,255,0.9);
    backdrop-filter: blur(8px);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--primary);
    font-size: 22px;
    box-shadow: 0 8px 30px rgba(0,0,0,0.15);
    transition: all 0.3s ease;
  }
  .featured-image .play-btn:hover {
    transform: translate(-50%, -50%) scale(1.08);
    background: #fff;
  }
  .featured-content h2 {
    font-size: 28px;
    font-weight: 800;
    color: #0f172a;
    line-height: 1.3;
    margin-bottom: 16px;
  }
  .featured-content .feature-list {
    list-style: none;
    padding: 0;
    margin: 24px 0 32px;
    display: flex;
    flex-direction: column;
    gap: 14px;
  }
  .feature-list li {
    display: flex;
    align-items: flex-start;
    gap: 12px;
    font-size: 15px;
    color: #334155;
    line-height: 1.6;
  }
  .feature-list li i {
    color: var(--primary);
    margin-top: 4px;
    flex-shrink: 0;
    font-size: 14px;
  }
  /* ===== Stats ===== */
  .stats-band {
    background: #0f172a;
    padding: 56px 0;
    position: relative;
    overflow: hidden;
  }
  .stats-band::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-image: url('/assets/images/backpic/back-3.png');
    background-size: cover;
    background-position: center;
    opacity: 0.12;
  }
  .stats-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
    position: relative;
    z-index: 2;
  }
  .stat-item {
    text-align: center;
    padding: 20px;
  }
  .stat-item strong {
    display: block;
    font-size: 40px;
    font-weight: 800;
    background: linear-gradient(120deg, #a5b4fc, #fbbf24);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    margin-bottom: 8px;
  }
  .stat-item span {
    font-size: 14px;
    color: #94a3b8;
  }
  /* ===== Ranking / List ===== */
  .ranking-list {
    display: grid;
    grid-template-columns: 1fr;
    gap: 16px;
  }
  .ranking-item {
    display: flex;
    align-items: center;
    gap: 20px;
    background: #fff;
    border: 1px solid var(--line);
    border-radius: 14px;
    padding: 18px 22px;
    transition: all 0.25s ease;
  }
  .ranking-item:hover {
    box-shadow: var(--shadow-card-hover);
    border-color: rgba(99,102,241,0.3);
    transform: translateX(4px);
  }
  .ranking-num {
    font-size: 24px;
    font-weight: 800;
    color: #cbd5e1;
    width: 44px;
    flex-shrink: 0;
    text-align: center;
  }
  .ranking-item:nth-child(1) .ranking-num {
    color: #f59e0b;
  }
  .ranking-item:nth-child(2) .ranking-num {
    color: #94a3b8;
  }
  .ranking-item:nth-child(3) .ranking-num {
    color: #d4a574;
  }
  .ranking-body {
    flex: 1;
  }
  .ranking-body h4 {
    font-size: 16px;
    font-weight: 700;
    color: #0f172a;
    margin-bottom: 4px;
  }
  .ranking-body p {
    font-size: 13px;
    color: #64748b;
  }
  .ranking-tag {
    font-size: 12px;
    background: rgba(99,102,241,0.08);
    color: var(--primary);
    padding: 4px 12px;
    border-radius: 100px;
    font-weight: 600;
    flex-shrink: 0;
  }
  /* ===== FAQ ===== */
  .faq-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
    max-width: 960px;
    margin: 0 auto;
  }
  .faq-item {
    background: #fff;
    border: 1px solid var(--line);
    border-radius: 14px;
    padding: 24px;
    transition: all 0.25s ease;
    cursor: pointer;
  }
  .faq-item:hover {
    border-color: rgba(99,102,241,0.4);
    box-shadow: var(--shadow-card);
  }
  .faq-item h3 {
    font-size: 15px;
    font-weight: 700;
    color: #0f172a;
    margin-bottom: 10px;
    display: flex;
    align-items: center;
    gap: 10px;
  }
  .faq-item h3::before {
    content: 'Q';
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 26px;
    height: 26px;
    border-radius: 8px;
    background: rgba(99,102,241,0.12);
    color: var(--primary);
    font-size: 13px;
    font-weight: 700;
    flex-shrink: 0;
  }
  .faq-item p {
    font-size: 14px;
    color: #64748b;
    line-height: 1.7;
    padding-left: 36px;
  }
  /* ===== CTA ===== */
  .cta-section {
    padding: 72px 0;
    background: linear-gradient(135deg, #4f46e5, #7c3aed);
    position: relative;
    overflow: hidden;
  }
  .cta-section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-image: url('/assets/images/backpic/back-1.png');
    background-size: cover;
    background-position: center;
    opacity: 0.12;
  }
  .cta-inner {
    text-align: center;
    position: relative;
    z-index: 2;
    max-width: 640px;
    margin: 0 auto;
  }
  .cta-inner h2 {
    font-size: 34px;
    font-weight: 800;
    color: #fff;
    margin-bottom: 16px;
    letter-spacing: -0.02em;
  }
  .cta-inner p {
    color: #e0e7ff;
    font-size: 16px;
    margin-bottom: 32px;
  }
  .btn-white {
    background: #fff;
    color: #4f46e5;
    font-weight: 700;
    box-shadow: 0 8px 24px rgba(0,0,0,0.15);
  }
  .btn-white:hover {
    transform: translateY(-2px);
    box-shadow: 0 12px 32px rgba(0,0,0,0.2);
    background: #f8fafc;
  }
  .btn-outline-light {
    background: transparent;
    color: #fff;
    border: 1.5px solid rgba(255,255,255,0.4);
  }
  .btn-outline-light:hover {
    background: rgba(255,255,255,0.1);
    border-color: #fff;
    transform: translateY(-2px);
  }
  /* ===== Footer ===== */
  .site-footer {
    background: #0f172a;
    padding: 72px 0 32px;
    color: #94a3b8;
  }
  .site-footer .logo-text {
    color: #fff;
  }
  .footer-top {
    display: grid;
    grid-template-columns: 1.4fr 2fr;
    gap: 48px;
    padding-bottom: 48px;
    border-bottom: 1px solid rgba(255,255,255,0.08);
  }
  .footer-brand p {
    font-size: 14px;
    line-height: 1.8;
    margin-top: 16px;
    color: #94a3b8;
    max-width: 340px;
  }
  .footer-nav {
    display: grid;
    grid-template-columns: 1fr 1fr 1fr;
    gap: 32px;
  }
  .footer-col h4 {
    font-size: 14px;
    font-weight: 700;
    color: #e2e8f0;
    margin-bottom: 16px;
    letter-spacing: 0.02em;
  }
  .footer-col a {
    display: block;
    font-size: 14px;
    color: #94a3b8;
    padding: 4px 0;
    transition: color 0.2s ease;
  }
  .footer-col a:hover {
    color: #c7d2fe;
  }
  .footer-note {
    font-size: 14px;
    line-height: 1.7;
    color: #94a3b8;
  }
  .footer-bottom {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: 28px;
    font-size: 13px;
    color: #64748b;
    flex-wrap: wrap;
    gap: 12px;
  }
  .footer-bottom p {
    margin: 0;
  }
  /* ===== Responsive ===== */
  @media (max-width: 1024px) {
    .cards-grid {
      grid-template-columns: repeat(2, 1fr);
    }
    .steps-grid {
      grid-template-columns: repeat(2, 1fr);
    }
    .step-arrow {
      display: none;
    }
    .search-box {
      width: 180px;
    }
    .hero-title {
      font-size: 36px;
    }
  }
  @media (max-width: 768px) {
    .header-inner {
      height: 64px;
      gap: 16px;
    }
    .site-nav {
      display: none;
      position: absolute;
      top: 64px;
      left: 0;
      width: 100%;
      background: #fff;
      border-bottom: 1px solid var(--line);
      flex-direction: column;
      padding: 16px 24px;
      align-items: stretch;
      gap: 4px;
      box-shadow: 0 12px 32px rgba(0,0,0,0.08);
    }
    .site-nav.open {
      display: flex;
    }
    .site-nav .nav-link {
      padding: 12px 16px;
      border-radius: 10px;
      font-size: 15px;
    }
    .nav-mobile-actions {
      display: block;
      margin-top: 8px;
    }
    .nav-actions .search-box,
    .nav-actions .nav-cta {
      display: none;
    }
    .nav-toggle {
      display: flex;
    }
    .page-hero {
      padding: 70px 0 56px;
    }
    .hero-title {
      font-size: 30px;
    }
    .hero-desc {
      font-size: 15px;
    }
    .hero-stats {
      gap: 24px;
      flex-wrap: wrap;
    }
    .section {
      padding: 56px 0;
    }
    .section-title {
      font-size: 26px;
    }
    .cards-grid {
      grid-template-columns: 1fr;
    }
    .steps-grid {
      grid-template-columns: 1fr;
    }
    .featured-grid {
      grid-template-columns: 1fr;
      gap: 32px;
    }
    .stats-grid {
      grid-template-columns: repeat(2, 1fr);
    }
    .faq-grid {
      grid-template-columns: 1fr;
    }
    .footer-top {
      grid-template-columns: 1fr;
      gap: 36px;
    }
    .footer-nav {
      grid-template-columns: 1fr 1fr;
    }
    .footer-bottom {
      flex-direction: column;
      text-align: center;
    }
  }
  @media (max-width: 520px) {
    .logo-text {
      font-size: 16px;
    }
    .logo-mark {
      width: 32px;
      height: 32px;
      font-size: 16px;
    }
    .hero-title {
      font-size: 26px;
    }
    .hero-actions {
      flex-direction: column;
      align-items: stretch;
    }
    .hero-actions .btn {
      width: 100%;
    }
    .hero-stats {
      flex-direction: column;
      gap: 16px;
    }
    .section-title {
      font-size: 22px;
    }
    .stats-grid {
      grid-template-columns: 1fr 1fr;
      gap: 12px;
    }
    .stat-item strong {
      font-size: 28px;
    }
    .footer-nav {
      grid-template-columns: 1fr;
    }
    .ranking-item {
      flex-wrap: wrap;
    }
    .ranking-tag {
      margin-left: 64px;
    }
    .cta-inner h2 {
      font-size: 26px;
    }
  }