/* roulang page: index */
:root {
  --bg-primary: #080c16;
  --bg-secondary: #0f1524;
  --bg-tertiary: #161e30;
  --surface: rgba(255, 255, 255, 0.03);
  --border: rgba(255, 255, 255, 0.08);
  --text-main: #eef2ff;
  --text-muted: #94a3b8;
  --brand: #22d3ee;
  --brand-2: #818cf8;
  --accent: #f472b6;
  --success: #34d399;
  --warning: #fbbf24;
  --radius: 20px;
  --radius-sm: 12px;
  --shadow: 0 20px 60px rgba(0, 0, 0, 0.35);
  --container-max: 1200px;
  --space-section: 84px;
}

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

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: "Inter", "PingFang SC", "HarmonyOS Sans SC", "Microsoft YaHei", sans-serif;
  background: var(--bg-primary);
  color: var(--text-main);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}

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

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

button,
input {
  font-family: inherit;
}

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

@media (min-width: 1200px) {
  .container {
    max-width: var(--container-max);
  }
}

/* ===== Header ===== */
.site-header {
  background: rgba(8, 12, 22, 0.88);
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
  position: sticky;
  top: 0;
  z-index: 1040;
}

.top-row {
  height: 76px;
}

.brand-logo {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  font-size: 1.35rem;
  font-weight: 800;
  letter-spacing: .5px;
  color: #fff;
  flex-shrink: 0;
}

.brand-mark {
  width: 42px;
  height: 42px;
  border-radius: 13px;
  background: linear-gradient(135deg, var(--brand), var(--brand-2));
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: .85rem;
  font-weight: 900;
  color: #08121b;
  letter-spacing: 0;
}

.brand-text {
  background: linear-gradient(90deg, #ffffff, #c7d2fe);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

.header-search {
  position: relative;
}

.header-search .form-control {
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(255, 255, 255, 0.1);
  color: #fff;
  border-radius: 999px 0 0 999px;
  padding: .5rem 1.1rem;
  width: 240px;
  height: 42px;
  font-size: .9rem;
  transition: border-color .2s, box-shadow .2s, background .2s;
}

.header-search .form-control::placeholder {
  color: #64748b;
}

.header-search .form-control:focus {
  border-color: var(--brand);
  box-shadow: 0 0 0 .2rem rgba(34, 211, 238, .12);
  background: rgba(255, 255, 255, 0.08);
  color: #fff;
}

.btn-search {
  height: 42px;
  border-radius: 0 999px 999px 0;
  background: linear-gradient(135deg, var(--brand), var(--brand-2));
  color: #08121b;
  border: none;
  padding: 0 1.1rem;
  font-weight: 700;
  transition: filter .2s, transform .2s;
}

.btn-search:hover {
  color: #08121b;
  filter: brightness(1.08);
  transform: translateY(-1px);
}

.btn-icon {
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(255, 255, 255, 0.12);
  color: #fff;
  border-radius: 12px;
  width: 42px;
  height: 42px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  transition: all .2s;
}

.btn-icon:hover {
  background: rgba(255, 255, 255, 0.1);
  color: var(--brand);
  border-color: rgba(34, 211, 238, .4);
}

.btn-brand {
  background: linear-gradient(135deg, var(--brand), var(--brand-2));
  color: #08121b;
  border: none;
  border-radius: 999px;
  font-weight: 700;
  padding: .6rem 1.4rem;
  transition: transform .2s ease, box-shadow .2s ease, filter .2s ease;
  box-shadow: 0 8px 24px rgba(34, 211, 238, .22);
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

.btn-brand:hover,
.btn-brand:focus {
  transform: translateY(-2px);
  box-shadow: 0 12px 32px rgba(34, 211, 238, .32);
  color: #08121b;
  filter: brightness(1.05);
}

.btn-ghost {
  background: transparent;
  border: 1px solid rgba(255, 255, 255, 0.18);
  color: #fff;
  border-radius: 999px;
  padding: .6rem 1.4rem;
  font-weight: 600;
  transition: all .2s;
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

.btn-ghost:hover,
.btn-ghost:focus {
  border-color: var(--brand);
  color: var(--brand);
  background: rgba(34, 211, 238, .08);
  transform: translateY(-2px);
}

.btn-lg {
  padding: .9rem 2rem;
  font-size: 1rem;
}

/* ===== Tab Nav ===== */
.tab-nav {
  border-top: 1px solid rgba(255, 255, 255, 0.04);
  background: rgba(13, 18, 30, 0.7);
}

.tab-scroll {
  display: flex;
  gap: 8px;
  overflow-x: auto;
  padding: 10px 0;
  scrollbar-width: none;
  -ms-overflow-style: none;
}

.tab-scroll::-webkit-scrollbar {
  display: none;
}

.nav-tab {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: .5rem 1.2rem;
  border-radius: 999px;
  font-size: .9rem;
  font-weight: 600;
  color: var(--text-muted);
  white-space: nowrap;
  transition: all .2s ease;
  border: 1px solid transparent;
  flex-shrink: 0;
}

.nav-tab:hover {
  color: #fff;
  background: rgba(255, 255, 255, .06);
}

.nav-tab.active {
  background: linear-gradient(135deg, rgba(34, 211, 238, .16), rgba(129, 140, 248, .16));
  border-color: rgba(34, 211, 238, .4);
  color: var(--brand);
}

.mobile-panel {
  background: var(--bg-secondary);
  border-top: 1px solid rgba(255, 255, 255, 0.06);
}

/* ===== Hero ===== */
.hero {
  position: relative;
  padding: 110px 0 96px;
  overflow: hidden;
  background: url('/assets/images/backpic/back-1.png') center center / cover no-repeat;
}

.hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(100deg, rgba(8, 12, 22, .94) 15%, rgba(8, 12, 22, .72) 55%, rgba(34, 211, 238, .28) 100%);
}

.hero::after {
  content: '';
  position: absolute;
  width: 500px;
  height: 500px;
  background: radial-gradient(circle, rgba(129, 140, 248, .22), transparent 70%);
  top: -160px;
  right: -100px;
  pointer-events: none;
}

.hero-inner {
  position: relative;
  z-index: 2;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(34, 211, 238, .12);
  border: 1px solid rgba(34, 211, 238, .35);
  color: var(--brand);
  padding: .35rem 1rem;
  border-radius: 999px;
  font-size: .82rem;
  font-weight: 700;
  letter-spacing: .3px;
  margin-bottom: 22px;
}

.hero h1 {
  font-size: clamp(2rem, 4.5vw, 3.4rem);
  font-weight: 900;
  line-height: 1.2;
  letter-spacing: -1px;
  margin-bottom: 20px;
}

.hero-sub {
  color: #cbd5e1;
  font-size: 1.1rem;
  max-width: 620px;
  margin-bottom: 32px;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-bottom: 36px;
}

.hero-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 18px;
  color: var(--text-muted);
  font-size: .9rem;
}

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

.hero-meta i {
  color: var(--success);
}

.hero-panel {
  position: relative;
  border-radius: 24px;
  padding: 12px;
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(255, 255, 255, 0.12);
  box-shadow: var(--shadow);
}

.hero-panel img {
  border-radius: 16px;
  width: 100%;
}

.hero-panel-tag {
  position: absolute;
  bottom: 30px;
  left: 30px;
  background: rgba(8, 12, 22, 0.75);
  backdrop-filter: blur(10px);
  border: 1px solid rgba(34, 211, 238, .4);
  color: #fff;
  padding: .35rem 1rem;
  border-radius: 999px;
  font-size: .82rem;
  font-weight: 600;
}

/* ===== Stat Strip ===== */
.stat-strip {
  background: linear-gradient(90deg, #0d1320, #131c31);
  border-top: 1px solid rgba(255, 255, 255, .04);
  border-bottom: 1px solid rgba(255, 255, 255, .04);
  padding: 30px 0;
}

.stat-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
}

.stat-item {
  text-align: center;
  border-right: 1px solid rgba(255, 255, 255, 0.06);
  padding: 8px 12px;
}

.stat-item:last-child {
  border-right: none;
}

.stat-num {
  display: block;
  font-size: 2.1rem;
  font-weight: 800;
  background: linear-gradient(90deg, var(--brand), var(--brand-2));
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  line-height: 1.3;
}

.stat-label {
  color: var(--text-muted);
  font-size: .9rem;
}

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

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

.section-head {
  max-width: 760px;
  margin-bottom: 48px;
}

.eyebrow {
  display: inline-block;
  background: rgba(34, 211, 238, .12);
  border: 1px solid rgba(34, 211, 238, .28);
  color: var(--brand);
  padding: .3rem .95rem;
  border-radius: 999px;
  font-size: .8rem;
  font-weight: 700;
  letter-spacing: .5px;
  margin-bottom: 16px;
}

.section-head h2 {
  font-size: clamp(1.8rem, 3vw, 2.6rem);
  font-weight: 800;
  letter-spacing: -.5px;
  margin-bottom: 14px;
}

.section-head p {
  color: var(--text-muted);
  font-size: 1.05rem;
  margin-bottom: 0;
}

/* ===== Feature Cards ===== */
.feature-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 32px 28px;
  height: 100%;
  transition: transform .3s ease, box-shadow .3s ease, border-color .3s ease, background .3s ease;
  position: relative;
  overflow: hidden;
}

.feature-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 4px;
  background: linear-gradient(90deg, var(--brand), var(--brand-2));
  opacity: 0;
  transition: opacity .3s;
}

.feature-card:hover {
  transform: translateY(-6px);
  border-color: rgba(34, 211, 238, .35);
  box-shadow: var(--shadow);
  background: rgba(255, 255, 255, 0.05);
}

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

.feature-icon {
  width: 56px;
  height: 56px;
  border-radius: 16px;
  background: linear-gradient(135deg, rgba(34, 211, 238, .2), rgba(129, 140, 248, .2));
  border: 1px solid rgba(34, 211, 238, .35);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 1.4rem;
  color: var(--brand);
  margin-bottom: 20px;
}

.feature-card h3 {
  font-size: 1.2rem;
  font-weight: 700;
  margin-bottom: 12px;
}

.feature-card p {
  color: var(--text-muted);
  font-size: .95rem;
  margin-bottom: 0;
}

/* ===== Category Cards ===== */
.category-card {
  display: block;
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--bg-tertiary);
  border: 1px solid var(--border);
  color: inherit;
  transition: transform .3s ease, box-shadow .3s ease, border-color .3s ease;
  height: 100%;
}

.category-card:hover {
  transform: translateY(-6px);
  border-color: rgba(129, 140, 248, .5);
  box-shadow: var(--shadow);
  color: inherit;
}

.category-card-img {
  overflow: hidden;
}

.category-card img {
  height: 210px;
  object-fit: cover;
  width: 100%;
  transition: transform .45s ease;
}

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

.category-body {
  padding: 24px;
}

.category-body h3 {
  font-size: 1.2rem;
  font-weight: 700;
  margin-bottom: 8px;
}

.category-body p {
  color: var(--text-muted);
  margin-bottom: 16px;
  font-size: .95rem;
}

.category-tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  color: var(--brand-2);
  font-weight: 600;
  font-size: .88rem;
  transition: gap .2s;
}

.category-card:hover .category-tag {
  gap: 10px;
}

/* ===== News List ===== */
.news-list {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
}

.news-card {
  border-radius: var(--radius-sm);
  background: rgba(255, 255, 255, 0.025);
  border: 1px solid var(--border);
  transition: transform .25s, border-color .25s, background .25s, box-shadow .25s;
  height: 100%;
}

.news-card:hover {
  border-color: rgba(34, 211, 238, .4);
  background: rgba(255, 255, 255, 0.05);
  transform: translateY(-4px);
  box-shadow: var(--shadow);
}

.news-card-inner {
  display: block;
  padding: 26px;
  height: 100%;
  color: inherit;
}

.news-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  margin-bottom: 14px;
}

.badge-cat {
  background: rgba(129, 140, 248, 0.16);
  color: #a5b4fc;
  border: 1px solid rgba(129, 140, 248, .3);
  padding: .2rem .75rem;
  border-radius: 999px;
  font-size: .78rem;
  font-weight: 600;
  white-space: nowrap;
}

.news-meta time {
  color: var(--text-muted);
  font-size: .82rem;
  white-space: nowrap;
}

.news-card h3 {
  font-size: 1.08rem;
  font-weight: 700;
  margin-bottom: 10px;
  line-height: 1.5;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.news-card p {
  color: var(--text-muted);
  font-size: .92rem;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  margin-bottom: 18px;
}

.news-more {
  color: var(--brand);
  font-weight: 600;
  font-size: .88rem;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  transition: gap .2s;
}

.news-card:hover .news-more {
  gap: 10px;
}

.empty-tip {
  grid-column: 1 / -1;
  text-align: center;
  padding: 48px 24px;
  background: rgba(255, 255, 255, .03);
  border: 1px dashed rgba(255, 255, 255, .14);
  border-radius: var(--radius);
  color: var(--text-muted);
}

/* ===== Topic Cards ===== */
.topic-card {
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid var(--border);
  background: var(--bg-tertiary);
  height: 100%;
  transition: transform .3s, box-shadow .3s, border-color .3s;
}

.topic-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow);
  border-color: rgba(34, 211, 238, .3);
}

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

.topic-card-body {
  padding: 26px;
}

.topic-card h3 {
  font-size: 1.15rem;
  font-weight: 700;
  margin-bottom: 10px;
}

.topic-card p {
  color: var(--text-muted);
  font-size: .95rem;
  margin-bottom: 16px;
}

.topic-link {
  color: var(--brand);
  font-weight: 600;
  font-size: .9rem;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  transition: gap .2s;
}

.topic-card:hover .topic-link {
  gap: 10px;
}

/* ===== Process ===== */
.process-section {
  background: url('/assets/images/backpic/back-2.png') center center / cover no-repeat;
  position: relative;
}

.process-section::before {
  content: '';
  position: absolute;
  inset: 0;
  background: rgba(8, 12, 22, .9);
}

.process-section .container {
  position: relative;
  z-index: 1;
}

.process-steps {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  margin-top: 40px;
}

.step-card {
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid rgba(255, 255, 255, 0.09);
  border-radius: var(--radius);
  padding: 30px 26px;
  transition: all .3s ease;
  height: 100%;
}

.step-card:hover {
  background: rgba(34, 211, 238, .08);
  border-color: rgba(34, 211, 238, .35);
  transform: translateY(-4px);
}

.step-num {
  font-size: 2rem;
  font-weight: 800;
  background: linear-gradient(135deg, var(--brand), var(--brand-2));
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  display: block;
  margin-bottom: 12px;
  line-height: 1.2;
}

.step-card h3 {
  font-size: 1.1rem;
  font-weight: 700;
  margin-bottom: 8px;
}

.step-card p {
  color: var(--text-muted);
  font-size: .92rem;
  margin-bottom: 0;
}

/* ===== FAQ ===== */
.accordion-item {
  background: rgba(255, 255, 255, 0.03) !important;
  border: 1px solid var(--border) !important;
  border-radius: var(--radius-sm) !important;
  overflow: hidden;
  margin-bottom: 14px;
}

.accordion-button {
  background: transparent !important;
  color: var(--text-main) !important;
  font-weight: 600;
  padding: 20px 24px;
  box-shadow: none !important;
  font-size: 1rem;
}

.accordion-button:not(.collapsed) {
  color: var(--brand) !important;
  background: rgba(34, 211, 238, .05) !important;
}

.accordion-button::after {
  filter: invert(1) brightness(1.6);
}

.accordion-body {
  color: var(--text-muted);
  padding: 0 24px 22px;
  line-height: 1.8;
}

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

.cta-box {
  background: linear-gradient(135deg, rgba(34, 211, 238, .16), rgba(129, 140, 248, .14));
  border: 1px solid rgba(34, 211, 238, .35);
  border-radius: 28px;
  padding: 60px 48px;
  text-align: center;
  position: relative;
  overflow: hidden;
}

.cta-box::before {
  content: '';
  position: absolute;
  width: 340px;
  height: 340px;
  background: radial-gradient(circle, rgba(34, 211, 238, .18), transparent 70%);
  top: -120px;
  right: -80px;
  border-radius: 50%;
}

.cta-box::after {
  content: '';
  position: absolute;
  width: 260px;
  height: 260px;
  background: radial-gradient(circle, rgba(129, 140, 248, .16), transparent 70%);
  bottom: -100px;
  left: -60px;
  border-radius: 50%;
}

.cta-box > * {
  position: relative;
  z-index: 1;
}

.cta-box h2 {
  font-size: clamp(1.6rem, 3vw, 2.4rem);
  font-weight: 800;
  margin-bottom: 12px;
}

.cta-box p {
  color: var(--text-muted);
  max-width: 580px;
  margin: 0 auto 30px;
  font-size: 1.05rem;
}

.cta-actions {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 14px;
}

/* ===== Footer ===== */
.site-footer {
  border-top: 1px solid rgba(255, 255, 255, .07);
  background: var(--bg-secondary);
  padding: 60px 0 28px;
}

.footer-brand .brand-logo {
  margin-bottom: 12px;
}

.footer-about {
  color: var(--text-muted);
  font-size: .95rem;
  max-width: 360px;
}

.footer-title {
  font-weight: 700;
  margin-bottom: 16px;
  font-size: 1.05rem;
}

.footer-links a {
  display: block;
  color: var(--text-muted);
  padding: 6px 0;
  transition: all .2s;
  font-size: .95rem;
}

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

.footer-contact-item {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  color: var(--text-muted);
  padding: 6px 0;
  font-size: .95rem;
}

.footer-contact-item i {
  color: var(--brand);
  margin-top: 4px;
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, .06);
  margin-top: 40px;
  padding-top: 24px;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  justify-content: space-between;
  color: var(--text-muted);
  font-size: .88rem;
}

.footer-bottom a {
  color: var(--text-muted);
  transition: color .2s;
}

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

/* ===== Responsive ===== */
@media (max-width: 991px) {
  .hero {
    padding: 80px 0 64px;
  }

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

  .stat-item {
    border-right: none;
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
    padding: 12px;
  }

  .stat-item:nth-child(n+3) {
    border-bottom: none;
  }

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

  .section {
    --space-section: 64px;
  }
}

@media (max-width: 767px) {
  .top-row {
    height: 66px;
  }

  .hero h1 {
    font-size: 1.75rem;
  }

  .hero {
    padding: 64px 0 56px;
  }

  .news-list {
    grid-template-columns: 1fr;
  }

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

  .cta-box {
    padding: 44px 24px;
  }

  .hero-meta {
    flex-direction: column;
    gap: 8px;
  }
}

@media (max-width: 520px) {
  .stat-grid {
    grid-template-columns: 1fr;
  }

  .stat-item {
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
  }

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

  .section-head h2 {
    font-size: 1.6rem;
  }

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

  .feature-card {
    padding: 26px 20px;
  }

  .category-body,
  .topic-card-body {
    padding: 20px;
  }

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

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

/* roulang page: category1 */
:root{
  --bs-body-font-family:'Inter','PingFang SC','Microsoft YaHei',system-ui,-apple-system,sans-serif;
  --primary:#7c5cfc;
  --primary-deep:#5b3ee8;
  --primary-soft:rgba(124,92,252,.12);
  --accent:#00d4ff;
  --accent-soft:rgba(0,212,255,.12);
  --success:#00ffa3;
  --warning:#ffc857;
  --danger:#ff6b7a;
  --bg-dark:#0a0f24;
  --bg-darker:#070b1a;
  --bg-card:#111838;
  --bg-card-hover:#16204a;
  --bg-soft:#f4f6ff;
  --text-light:#f0f3ff;
  --text-muted:#8d9ac7;
  --text-dim:#5b6b9c;
  --border-color:rgba(255,255,255,.08);
  --border-light:#e4e9f8;
  --radius-lg:24px;
  --radius-md:16px;
  --radius-sm:10px;
  --shadow-lg:0 20px 50px rgba(0,0,0,.35);
  --shadow-card:0 10px 35px rgba(0,0,0,.25);
  --shadow-soft:0 6px 25px rgba(0,0,0,.12);
  --transition:all .3s cubic-bezier(.4,0,.2,1);
}
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{
  font-family:var(--bs-body-font-family);
  background:var(--bg-darker);
  color:var(--text-light);
  line-height:1.7;
  font-size:16px;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block}
a{color:var(--accent);text-decoration:none;transition:var(--transition)}
a:hover{color:#fff}
button,input,textarea{font-family:inherit}
ul,ol{list-style:none}
.container{max-width:1260px;padding-left:24px;padding-right:24px}
/* ===== Header ===== */
.site-header{
  position:sticky;top:0;z-index:1050;
  background:rgba(10,15,36,.92);
  backdrop-filter:blur(18px);
  border-bottom:1px solid var(--border-color);
}
.header-top{
  padding:16px 0;
  border-bottom:1px solid rgba(255,255,255,.04);
}
.brand-logo{
  display:inline-flex;align-items:center;gap:12px;
  font-size:20px;font-weight:800;color:#fff;
}
.brand-logo:hover{color:var(--accent)}
.brand-mark{
  width:42px;height:42px;display:inline-flex;align-items:center;justify-content:center;
  background:linear-gradient(135deg,var(--primary),var(--accent));
  border-radius:12px;color:#fff;font-weight:900;font-size:15px;letter-spacing:1px;
  box-shadow:0 0 20px rgba(124,92,252,.4);
}
.brand-text{font-size:19px;letter-spacing:.5px}
.header-actions{display:flex;align-items:center;gap:14px}
.header-search{
  display:flex;align-items:center;gap:8px;
  background:rgba(255,255,255,.06);
  border:1px solid rgba(255,255,255,.1);
  border-radius:40px;padding:8px 18px;color:var(--text-muted);
  transition:var(--transition);font-size:14px;
}
.header-search i{font-size:13px;color:var(--accent)}
.header-search input{
  background:transparent;border:none;outline:none;color:#fff;width:140px;font-size:14px;
}
.header-search input::placeholder{color:var(--text-muted)}
.header-search:focus-within{border-color:var(--accent);box-shadow:0 0 15px rgba(0,212,255,.15)}
.header-cta{
  display:inline-flex;align-items:center;gap:8px;
  background:linear-gradient(135deg,var(--primary),var(--accent));
  color:#fff;font-weight:600;font-size:14px;border-radius:40px;
  padding:9px 22px;border:none;transition:var(--transition);
  box-shadow:0 4px 20px rgba(124,92,252,.35);
}
.header-cta:hover{transform:translateY(-2px);box-shadow:0 8px 28px rgba(124,92,252,.5);color:#fff}
.nav-tabs-row{position:relative}
.tab-nav .container{display:flex;align-items:center;gap:20px}
.tab-scroll{
  display:flex;align-items:center;gap:6px;
  overflow-x:auto;scrollbar-width:none;padding:8px 0;
}
.tab-scroll::-webkit-scrollbar{display:none}
.nav-tab{
  display:inline-flex;align-items:center;gap:8px;
  padding:9px 18px;border-radius:40px;
  color:var(--text-muted);font-size:14px;font-weight:600;
  white-space:nowrap;border:1px solid transparent;transition:var(--transition);
}
.nav-tab i{font-size:13px}
.nav-tab:hover{color:#fff;background:rgba(255,255,255,.06)}
.nav-tab.active{
  background:var(--primary-soft);
  border-color:rgba(124,92,252,.3);
  color:var(--primary-light,#b2a4ff);
}
.nav-tab.active i{color:var(--accent)}
/* ===== Page Banner ===== */
.page-banner{
  position:relative;padding:110px 0 90px;
  background-image:url('/assets/images/backpic/back-2.png');
  background-size:cover;background-position:center;
  border-bottom:1px solid rgba(255,255,255,.05);
}
.page-banner::before{
  content:'';position:absolute;inset:0;
  background:linear-gradient(180deg,rgba(7,11,26,.7) 0%,rgba(10,15,36,.88) 78%,var(--bg-darker) 100%);
}
.page-banner .container{position:relative;z-index:2}
.breadcrumb-custom{
  display:inline-flex;align-items:center;gap:7px;margin-bottom:20px;
  font-size:14px;color:var(--text-muted);
}
.breadcrumb-custom a{color:var(--text-muted);transition:var(--transition)}
.breadcrumb-custom a:hover{color:var(--accent)}
.breadcrumb-custom i{font-size:11px;opacity:.6}
.banner-title{
  font-size:46px;font-weight:800;line-height:1.2;letter-spacing:.5px;
  margin:0 0 18px;color:#fff;
}
.banner-title span{
  background:linear-gradient(135deg,var(--accent),var(--primary));
  -webkit-background-clip:text;-webkit-text-fill-color:transparent;
}
.banner-subtitle{
  font-size:17px;color:var(--text-muted);max-width:640px;margin-bottom:26px;line-height:1.8;
}
.banner-badges{display:flex;flex-wrap:wrap;gap:10px}
.badge-tag{
  display:inline-flex;align-items:center;gap:6px;
  padding:5px 15px;border-radius:30px;font-size:13px;
  background:rgba(255,255,255,.07);border:1px solid rgba(255,255,255,.1);
  color:var(--text-light);font-weight:500;
}
.badge-tag i{color:var(--accent);font-size:11px}
/* ===== Section Base ===== */
.section-block{padding:80px 0;position:relative}
.section-block-alt{background:var(--bg-dark)}
.section-header{margin-bottom:50px;max-width:700px}
.section-header .eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:13px;font-weight:700;color:var(--accent);letter-spacing:1px;
  text-transform:uppercase;margin-bottom:12px;
}
.section-header .eyebrow::before{content:'';width:24px;height:2px;background:var(--accent);border-radius:2px}
.section-header h2{
  font-size:32px;font-weight:800;line-height:1.25;color:#fff;margin:0 0 12px;
}
.section-header p{color:var(--text-muted);font-size:16px;line-height:1.8;margin:0}
.section-header.center{text-align:center;margin-left:auto;margin-right:auto}
.section-header.center .eyebrow::before{display:none}
/* ===== Overview ===== */
.overview-wrap{
  display:grid;grid-template-columns:1fr 1fr;gap:60px;align-items:center;
}
.overview-media{position:relative;border-radius:var(--radius-lg);overflow:hidden;box-shadow:var(--shadow-lg)}
.overview-media img{width:100%;height:400px;object-fit:cover;transition:transform .5s}
.overview-media:hover img{transform:scale(1.03)}
.overview-media::after{
  content:'';position:absolute;inset:0;border:1px solid rgba(255,255,255,.2);border-radius:var(--radius-lg);
}
.overview-content p{color:var(--text-muted);font-size:16px;line-height:1.85;margin-bottom:18px}
.overview-list{margin-top:8px}
.overview-list li{
  display:flex;align-items:flex-start;gap:12px;margin-bottom:14px;
  color:var(--text-muted);font-size:15px;line-height:1.6;
}
.overview-list li i{
  flex:0 0 auto;width:22px;height:22px;border-radius:50%;
  background:var(--accent-soft);color:var(--accent);
  display:flex;align-items:center;justify-content:center;font-size:11px;margin-top:4px;
}
/* ===== Feature Cards ===== */
.features-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.feature-card{
  background:var(--bg-card);border:1px solid var(--border-color);
  border-radius:var(--radius-md);padding:32px 26px;
  transition:var(--transition);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:var(--transition);
}
.feature-card:hover{
  transform:translateY(-6px);background:var(--bg-card-hover);
  border-color:rgba(124,92,252,.3);box-shadow:var(--shadow-card);
}
.feature-card:hover::before{opacity:1}
.feature-icon{
  width:56px;height:56px;border-radius:16px;
  background:linear-gradient(135deg,var(--primary-soft),var(--accent-soft));
  display:flex;align-items:center;justify-content:center;
  color:var(--accent);font-size:22px;margin-bottom:22px;
  transition:var(--transition);
}
.feature-card:hover .feature-icon{
  background:linear-gradient(135deg,var(--primary),var(--accent));
  color:#fff;box-shadow:0 0 25px rgba(124,92,252,.4);
}
.feature-card h3{font-size:18px;font-weight:700;color:#fff;margin-bottom:12px}
.feature-card p{color:var(--text-muted);font-size:14px;line-height:1.7;margin-bottom:14px}
.feature-tags{display:flex;flex-wrap:wrap;gap:6px}
.feature-tags span{
  font-size:12px;color:var(--text-muted);padding:3px 10px;
  background:rgba(255,255,255,.05);border-radius:20px;border:1px solid rgba(255,255,255,.06);
}
/* ===== Steps ===== */
.steps-section{background:linear-gradient(180deg,var(--bg-dark),var(--bg-darker))}
.steps-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:26px;counter-reset:step}
.step-item{
  background:rgba(255,255,255,.03);border:1px solid var(--border-color);
  border-radius:var(--radius-md);padding:32px 24px;position:relative;
  transition:var(--transition);text-align:center;
}
.step-item:hover{border-color:rgba(0,212,255,.3);transform:translateY(-4px);box-shadow:var(--shadow-soft)}
.step-num{
  width:42px;height:42px;border-radius:50%;margin:0 auto 20px;
  background:linear-gradient(135deg,var(--primary),var(--accent));
  display:flex;align-items:center;justify-content:center;
  font-size:17px;font-weight:800;color:#fff;box-shadow:0 0 20px rgba(124,92,252,.35);
}
.step-item h3{font-size:16px;font-weight:700;color:#fff;margin-bottom:10px}
.step-item p{color:var(--text-muted);font-size:13px;line-height:1.7;margin:0}
/* ===== Stats Panel ===== */
.stats-panel{
  background:linear-gradient(135deg,rgba(124,92,252,.15),rgba(0,212,255,.08));
  border:1px solid rgba(124,92,252,.25);
  border-radius:var(--radius-lg);
  padding:60px 50px;
  display:grid;grid-template-columns:repeat(4,1fr);gap:40px;
  text-align:center;position:relative;overflow:hidden;
}
.stats-panel::before{
  content:'';position:absolute;top:-80px;right:-80px;width:300px;height:300px;
  background:radial-gradient(circle,rgba(0,212,255,.25),transparent 70%);
  pointer-events:none;
}
.stat-item{position:relative}
.stat-icon{
  font-size:28px;color:var(--accent);margin-bottom:12px;
  display:inline-block;
}
.stat-number{
  font-size:38px;font-weight:800;color:#fff;line-height:1.1;
  background:linear-gradient(135deg,#fff,var(--accent));
  -webkit-background-clip:text;-webkit-text-fill-color:transparent;
}
.stat-label{color:var(--text-muted);font-size:14px;margin-top:6px}
/* ===== Article list ===== */
.article-card{
  display:flex;gap:24px;background:var(--bg-card);
  border:1px solid var(--border-color);border-radius:var(--radius-md);
  padding:24px;transition:var(--transition);margin-bottom:18px;
}
.article-card:hover{border-color:rgba(0,212,255,.3);transform:translateX(4px);box-shadow:var(--shadow-soft)}
.article-thumb{
  flex:0 0 auto;width:210px;height:140px;border-radius:var(--radius-sm);
  overflow:hidden;position:relative;
}
.article-thumb img{width:100%;height:100%;object-fit:cover;transition:transform .4s}
.article-card:hover .article-thumb img{transform:scale(1.05)}
.article-body{flex:1;display:flex;flex-direction:column;justify-content:center}
.article-meta{
  display:flex;align-items:center;gap:16px;margin-bottom:8px;
  font-size:12px;color:var(--text-muted);
}
.article-meta .tag{
  padding:2px 10px;border-radius:20px;font-weight:600;
  background:var(--primary-soft);color:#b2a4ff;
}
.article-meta .date i{margin-right:4px;font-size:11px}
.article-title{font-size:18px;font-weight:700;color:#fff;margin-bottom:6px;line-height:1.4}
.article-title a{color:#fff}
.article-title a:hover{color:var(--accent)}
.article-desc{color:var(--text-muted);font-size:14px;line-height:1.65;margin:0}
/* ===== FAQ ===== */
.faq-wrap{max-width:860px;margin:0 auto}
.faq-wrapper .accordion-item{
  background:var(--bg-card);border:1px solid var(--border-color);
  border-radius:var(--radius-md)!important;overflow:hidden;
  margin-bottom:16px;
}
.faq-wrapper .accordion-button{
  background:transparent;color:var(--text-light);
  font-size:16px;font-weight:600;padding:22px 26px;
  box-shadow:none;border:none;
}
.faq-wrapper .accordion-button::after{
  background-image:none;content:'\f078';
  font-family:'Font Awesome 6 Free';font-weight:900;
  font-size:14px;color:var(--accent);width:20px;height:20px;
  display:flex;align-items:center;justify-content:center;
  transition:transform .3s;
}
.faq-wrapper .accordion-button:not(.collapsed){
  background:rgba(124,92,252,.08);color:#fff;
}
.faq-wrapper .accordion-button:not(.collapsed)::after{transform:rotate(180deg)}
.faq-wrapper .accordion-button:focus{box-shadow:none;border-color:transparent}
.faq-wrapper .accordion-body{
  color:var(--text-muted);line-height:1.8;font-size:15px;padding:8px 26px 24px;
}
/* ===== CTA ===== */
.cta-section{
  background:linear-gradient(135deg,var(--primary-deep),rgba(0,212,255,.6));
  border-radius:var(--radius-lg);padding:70px 50px;position:relative;overflow:hidden;
  text-align:center;
}
.cta-section::before{
  content:'';position:absolute;top:-50px;left:-50px;width:200px;height:200px;
  background:rgba(255,255,255,.1);border-radius:50%;
}
.cta-section::after{
  content:'';position:absolute;bottom:-90px;right:-40px;width:260px;height:260px;
  background:rgba(255,255,255,.08);border-radius:50%;
}
.cta-section h2{color:#fff;font-size:30px;font-weight:800;margin-bottom:12px;position:relative;z-index:2}
.cta-section p{color:rgba(255,255,255,.85);font-size:16px;margin-bottom:28px;position:relative;z-index:2}
.btn-light-custom{
  display:inline-flex;align-items:center;gap:10px;
  background:#fff;color:var(--primary-deep);
  font-weight:700;font-size:15px;border-radius:40px;
  padding:12px 28px;border:none;transition:var(--transition);
  box-shadow:0 4px 20px rgba(0,0,0,.15);position:relative;z-index:2;
}
.btn-light-custom:hover{transform:translateY(-2px);box-shadow:0 10px 30px rgba(0,0,0,.25);color:var(--primary)}
/* ===== Footer ===== */
.site-footer{
  background:var(--bg-darker);border-top:1px solid var(--border-color);
  padding:70px 0 0;margin-top:0;
}
.footer-top{padding-bottom:50px;border-bottom:1px solid rgba(255,255,255,.06)}
.footer-brand{margin-bottom:20px}
.footer-about{color:var(--text-muted);font-size:14px;line-height:1.8;max-width:340px;margin-top:16px}
.footer-title{
  color:#fff;font-size:16px;font-weight:700;margin:10px 0 20px;
  letter-spacing:.3px;
}
.footer-links{display:flex;flex-direction:column;gap:12px}
.footer-links a{color:var(--text-muted);font-size:14px;transition:var(--transition)}
.footer-links a:hover{color:var(--accent);padding-left:6px}
.footer-contact-item{
  display:flex;align-items:center;gap:10px;
  color:var(--text-muted);font-size:14px;margin-bottom:14px;
}
.footer-contact-item i{color:var(--accent);width:20px;text-align:center;font-size:13px}
.footer-bottom{
  padding:24px 0;display:flex;justify-content:space-between;flex-wrap:wrap;gap:10px;
  color:var(--text-dim);font-size:13px;
}
/* ===== Focus States ===== */
a:focus-visible,button:focus-visible,input:focus-visible{
  outline:2px solid var(--accent);outline-offset:3px;border-radius:4px;
}
/* ===== Responsive ===== */
@media (max-width:1024px){
  .features-grid{grid-template-columns:repeat(2,1fr)}
  .steps-grid{grid-template-columns:repeat(2,1fr)}
  .stats-panel{grid-template-columns:repeat(2,1fr);padding:45px 30px}
  .overview-wrap{grid-template-columns:1fr;gap:40px}
  .overview-media img{height:320px}
  .banner-title{font-size:38px}
}
@media (max-width:768px){
  .header-top{padding:12px 0}
  .header-search input{width:90px}
  .header-cta span{display:none}
  .section-block{padding:60px 0}
  .banner-title{font-size:30px}
  .page-banner{padding:80px 0 60px}
  .article-card{flex-direction:column}
  .article-thumb{width:100%;height:180px}
  .section-header h2{font-size:26px}
  .stats-panel{grid-template-columns:1fr 1fr;gap:30px}
  .cta-section{padding:50px 30px}
  .footer-top [class*="col-"]{margin-bottom:30px}
}
@media (max-width:520px){
  .container{padding-left:16px;padding-right:16px}
  .features-grid{grid-template-columns:1fr}
  .steps-grid{grid-template-columns:1fr}
  .stats-panel{grid-template-columns:1fr}
  .banner-title{font-size:26px}
  .overview-media img{height:220px}
  .footer-bottom{flex-direction:column;text-align:center}
  .header-search{display:none}
  .section-block{padding:48px 0}
}

/* roulang page: article */
:root {
      --primary: #00d9ff;
      --primary-rgb: 0, 217, 255;
      --secondary: #f4358f;
      --secondary-rgb: 244, 53, 143;
      --bg-deep: #04070d;
      --bg-dark: #070b14;
      --bg-soft: #0e1524;
      --panel: rgba(255, 255, 255, 0.045);
      --panel-strong: rgba(255, 255, 255, 0.08);
      --border-color: rgba(255, 255, 255, 0.09);
      --heading-color: #f2f7ff;
      --text-main: #cbd5e6;
      --text-muted: #7f8aa6;
      --radius: 16px;
      --radius-lg: 24px;
      --radius-sm: 10px;
      --shadow-card: 0 18px 45px rgba(0, 0, 0, 0.35);
      --shadow-glow: 0 0 32px rgba(0, 217, 255, 0.22);
      --font-body: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
      --transition: 0.25s ease;
    }

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

    html {
      scroll-behavior: smooth;
    }

    body {
      font-family: var(--font-body);
      background: var(--bg-deep);
      color: var(--text-main);
      line-height: 1.75;
      overflow-x: hidden;
      -webkit-font-smoothing: antialiased;
      text-rendering: optimizeLegibility;
    }

    a {
      color: inherit;
      text-decoration: none;
      transition: color var(--transition), background var(--transition), border-color var(--transition), box-shadow var(--transition), transform var(--transition);
    }

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

    button,
    input,
    select,
    textarea {
      font-family: inherit;
      font-size: inherit;
      color: inherit;
      outline: none;
    }

    .container {
      max-width: 1240px;
    }

    /* Scrollbar */
    ::-webkit-scrollbar {
      width: 8px;
      height: 6px;
    }
    ::-webkit-scrollbar-track {
      background: #0a0f1a;
    }
    ::-webkit-scrollbar-thumb {
      background: rgba(255, 255, 255, 0.15);
      border-radius: 10px;
    }

    /* Buttons */
    .btn {
      border: none;
      border-radius: 50px;
      padding: 0.65rem 1.5rem;
      font-weight: 600;
      line-height: 1.5;
      transition: transform 0.2s ease, box-shadow 0.2s ease, background 0.2s ease, border-color 0.2s ease, color 0.2s ease;
    }

    .btn-primary {
      background: linear-gradient(135deg, var(--primary), var(--secondary));
      color: #ffffff;
      box-shadow: 0 8px 24px rgba(var(--primary-rgb), 0.25);
    }

    .btn-primary:hover,
    .btn-primary:focus {
      background: linear-gradient(135deg, #33e2ff, #ff5aa8);
      color: #ffffff;
      transform: translateY(-2px);
      box-shadow: 0 12px 32px rgba(var(--primary-rgb), 0.4);
    }

    .btn-ghost {
      background: rgba(255, 255, 255, 0.06);
      border: 1px solid rgba(255, 255, 255, 0.14);
      color: #e6edf7;
    }

    .btn-ghost:hover {
      background: rgba(255, 255, 255, 0.12);
      border-color: rgba(255, 255, 255, 0.3);
      color: #ffffff;
      transform: translateY(-2px);
    }

    .btn-outline-primary {
      background: transparent;
      border: 1px solid rgba(var(--primary-rgb), 0.5);
      color: var(--primary);
    }

    .btn-outline-primary:hover {
      background: rgba(var(--primary-rgb), 0.12);
      color: #9cebff;
      transform: translateY(-2px);
    }

    .btn-sm {
      padding: 0.45rem 1.2rem;
      font-size: 0.9rem;
    }

    /* Header */
    .site-header {
      position: sticky;
      top: 0;
      z-index: 1030;
      background: rgba(4, 7, 13, 0.88);
      backdrop-filter: blur(18px);
      -webkit-backdrop-filter: blur(18px);
      border-bottom: 1px solid rgba(255, 255, 255, 0.06);
      box-shadow: 0 8px 30px rgba(0, 0, 0, 0.25);
    }

    .header-top {
      padding: 0.9rem 0;
      border-bottom: 1px solid rgba(255, 255, 255, 0.06);
    }

    .header-row {
      gap: 1rem;
    }

    .brand-logo {
      display: inline-flex;
      align-items: center;
      gap: 0.7rem;
      flex-shrink: 0;
    }

    .brand-mark {
      width: 42px;
      height: 42px;
      display: inline-flex;
      align-items: center;
      justify-content: center;
      background: linear-gradient(135deg, var(--primary), var(--secondary));
      color: #ffffff;
      border-radius: 12px;
      font-weight: 800;
      font-size: 1rem;
      letter-spacing: 0.05em;
      box-shadow: 0 0 24px rgba(var(--primary-rgb), 0.4);
    }

    .brand-text {
      color: var(--heading-color);
      font-size: 1.25rem;
      font-weight: 800;
      letter-spacing: 0.04em;
      white-space: nowrap;
    }

    .header-actions {
      gap: 0.9rem;
    }

    .header-search {
      display: flex;
      align-items: center;
      background: rgba(255, 255, 255, 0.05);
      border: 1px solid rgba(255, 255, 255, 0.08);
      border-radius: 50px;
      padding: 0.25rem 0.25rem 0.25rem 1.1rem;
      transition: border-color 0.2s ease, box-shadow 0.2s ease;
    }

    .header-search:focus-within {
      border-color: rgba(var(--primary-rgb), 0.5);
      box-shadow: 0 0 18px rgba(var(--primary-rgb), 0.15);
    }

    .header-search input {
      background: transparent;
      border: none;
      width: 180px;
      color: var(--text-main);
      font-size: 0.9rem;
    }

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

    .header-search button {
      width: 36px;
      height: 36px;
      border-radius: 50px;
      border: none;
      background: linear-gradient(135deg, var(--primary), var(--secondary));
      color: #ffffff;
      display: inline-flex;
      align-items: center;
      justify-content: center;
      font-size: 0.85rem;
      transition: transform 0.2s ease, box-shadow 0.2s ease;
    }

    .header-search button:hover {
      transform: scale(1.06);
      box-shadow: 0 0 16px rgba(var(--primary-rgb), 0.45);
    }

    .mobile-search-toggle {
      width: 40px;
      height: 40px;
      border-radius: 50px;
      border: 1px solid rgba(255, 255, 255, 0.12);
      background: rgba(255, 255, 255, 0.05);
      color: var(--text-main);
      display: inline-flex;
      align-items: center;
      justify-content: center;
    }

    .header-cta {
      white-space: nowrap;
    }

    /* Tab Navigation */
    .tab-nav {
      background: linear-gradient(180deg, rgba(255, 255, 255, 0.03), transparent);
    }

    .tab-scroll {
      display: flex;
      align-items: center;
      gap: 0.6rem;
      padding-top: 0.6rem;
      padding-bottom: 0.6rem;
      overflow-x: auto;
      scrollbar-width: none;
      -ms-overflow-style: none;
    }

    .tab-scroll::-webkit-scrollbar {
      display: none;
    }

    .nav-tab {
      display: inline-flex;
      align-items: center;
      gap: 0.45rem;
      background: rgba(255, 255, 255, 0.04);
      border: 1px solid transparent;
      color: var(--text-muted);
      padding: 0.5rem 1.15rem;
      border-radius: 50px;
      font-size: 0.92rem;
      font-weight: 600;
      white-space: nowrap;
      transition: all var(--transition);
    }

    .nav-tab i {
      font-size: 0.9rem;
    }

    .nav-tab:hover {
      color: var(--heading-color);
      background: rgba(255, 255, 255, 0.08);
      transform: translateY(-1px);
    }

    .nav-tab.active {
      color: #ffffff;
      background: linear-gradient(135deg, rgba(var(--primary-rgb), 0.2), rgba(var(--secondary-rgb), 0.2));
      border-color: rgba(var(--primary-rgb), 0.45);
      box-shadow: 0 0 18px rgba(var(--primary-rgb), 0.18);
    }

    /* Page Banner */
    .page-banner {
      position: relative;
      background-position: center center;
      background-size: cover;
      background-repeat: no-repeat;
      padding: 5.5rem 0 5rem;
      border-bottom: 1px solid rgba(255, 255, 255, 0.06);
    }

    .banner-overlay {
      position: absolute;
      inset: 0;
      background: linear-gradient(180deg, rgba(4, 7, 13, 0.78) 0%, rgba(4, 7, 13, 0.92) 100%);
    }

    .page-banner-inner {
      position: relative;
      z-index: 2;
      text-align: center;
    }

    .breadcrumb-nav {
      display: flex;
      justify-content: center;
      align-items: center;
      gap: 0.5rem;
      font-size: 0.86rem;
      color: var(--text-muted);
      margin-bottom: 1.2rem;
    }

    .breadcrumb-nav a {
      color: var(--text-muted);
      transition: color 0.2s ease;
    }

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

    .breadcrumb-nav .separator {
      color: rgba(255, 255, 255, 0.25);
      font-size: 0.7rem;
    }

    .breadcrumb-nav .current {
      color: rgba(255, 255, 255, 0.75);
    }

    .page-banner h1 {
      color: var(--heading-color);
      font-size: 2.6rem;
      font-weight: 800;
      letter-spacing: 0.02em;
      line-height: 1.3;
      max-width: 900px;
      margin: 0 auto 1.2rem;
      text-shadow: 0 4px 24px rgba(0, 0, 0, 0.45);
    }

    .article-meta {
      display: flex;
      justify-content: center;
      flex-wrap: wrap;
      gap: 0.6rem;
    }

    .meta-chip {
      display: inline-flex;
      align-items: center;
      gap: 0.4rem;
      background: rgba(255, 255, 255, 0.07);
      border: 1px solid rgba(255, 255, 255, 0.09);
      border-radius: 50px;
      padding: 0.35rem 0.95rem;
      font-size: 0.85rem;
      color: rgba(255, 255, 255, 0.75);
      backdrop-filter: blur(8px);
    }

    /* Main */
    .page-main {
      padding: 3rem 0 4rem;
      position: relative;
      z-index: 2;
    }

    .content-card {
      background: linear-gradient(180deg, rgba(255, 255, 255, 0.045), rgba(255, 255, 255, 0.02));
      border: 1px solid rgba(255, 255, 255, 0.08);
      border-radius: var(--radius-lg);
      padding: 2.2rem 2.4rem;
      box-shadow: var(--shadow-card);
      margin-bottom: 2rem;
    }

    .content-label {
      display: inline-block;
      font-size: 0.82rem;
      font-weight: 700;
      letter-spacing: 0.08em;
      color: var(--primary);
      background: rgba(var(--primary-rgb), 0.12);
      border: 1px solid rgba(var(--primary-rgb), 0.25);
      padding: 0.25rem 0.8rem;
      border-radius: 50px;
      margin-bottom: 1rem;
    }

    .content-card h1 {
      color: var(--heading-color);
      font-size: 1.9rem;
      font-weight: 800;
      line-height: 1.35;
      margin-bottom: 0.8rem;
    }

    .content-desc {
      color: var(--text-muted);
      font-size: 1rem;
      margin-bottom: 1.2rem;
    }

    .content-meta {
      display: flex;
      flex-wrap: wrap;
      align-items: center;
      gap: 1rem;
      color: var(--text-muted);
      font-size: 0.9rem;
      margin-top: 0.6rem;
    }

    .content-meta .meta-sep {
      width: 4px;
      height: 4px;
      background: rgba(255, 255, 255, 0.3);
      border-radius: 50%;
    }

    .divider {
      height: 1px;
      background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.14), transparent);
      margin: 1.5rem 0 1.8rem;
    }

    .article-body {
      color: var(--text-main);
      font-size: 1.02rem;
      line-height: 2;
      word-break: break-word;
    }

    .article-body h2,
    .article-body h3,
    .article-body h4 {
      color: var(--heading-color);
      margin: 1.8rem 0 1rem;
      font-weight: 700;
      line-height: 1.4;
    }

    .article-body p {
      margin-bottom: 1.2rem;
    }

    .article-body ul,
    .article-body ol {
      margin-bottom: 1.4rem;
      padding-left: 1.3rem;
    }

    .article-body li {
      margin-bottom: 0.55rem;
    }

    .article-body img {
      border-radius: var(--radius);
      margin: 1.5rem 0;
      box-shadow: var(--shadow-card);
    }

    .article-body blockquote {
      border-left: 4px solid var(--primary);
      background: rgba(var(--primary-rgb), 0.07);
      padding: 1rem 1.4rem;
      border-radius: 0 var(--radius) var(--radius) 0;
      color: rgba(255, 255, 255, 0.8);
      margin: 1.5rem 0;
    }

    .article-body a {
      color: var(--primary);
      text-decoration: underline;
      text-underline-offset: 4px;
    }

    .article-body a:hover {
      color: #87eaff;
    }

    .article-body table {
      width: 100%;
      margin: 1.5rem 0;
      border-collapse: collapse;
      font-size: 0.95rem;
    }

    .article-body table th,
    .article-body table td {
      border: 1px solid rgba(255, 255, 255, 0.08);
      padding: 0.75rem 1rem;
    }

    .article-body table th {
      background: rgba(255, 255, 255, 0.06);
      color: var(--heading-color);
      font-weight: 600;
    }

    /* Article Tags */
    .article-tags {
      display: flex;
      flex-wrap: wrap;
      align-items: center;
      gap: 0.5rem;
      margin-top: 2rem;
      padding-top: 1.5rem;
      border-top: 1px solid rgba(255, 255, 255, 0.06);
    }

    .tags-title {
      color: var(--text-muted);
      font-size: 0.9rem;
      margin-right: 0.2rem;
    }

    .tag-chip {
      background: rgba(255, 255, 255, 0.06);
      border: 1px solid rgba(255, 255, 255, 0.08);
      border-radius: 50px;
      color: rgba(255, 255, 255, 0.72);
      font-size: 0.82rem;
      padding: 0.25rem 0.85rem;
      transition: all 0.2s ease;
    }

    .tag-chip:hover {
      border-color: rgba(var(--primary-rgb), 0.45);
      color: var(--primary);
    }

    /* Share */
    .article-share {
      display: flex;
      align-items: center;
      gap: 0.6rem;
      margin-top: 1.4rem;
      color: var(--text-muted);
      font-size: 0.92rem;
    }

    .article-share a {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      width: 38px;
      height: 38px;
      border-radius: 50px;
      background: rgba(255, 255, 255, 0.06);
      border: 1px solid rgba(255, 255, 255, 0.08);
      color: rgba(255, 255, 255, 0.7);
      font-size: 0.92rem;
      transition: all 0.2s ease;
    }

    .article-share a:hover {
      transform: translateY(-3px);
      color: var(--primary);
      border-color: rgba(var(--primary-rgb), 0.5);
      box-shadow: 0 8px 18px rgba(0, 0, 0, 0.2);
    }

    /* Related Section */
    .related-section {
      margin-top: 1.5rem;
    }

    .section-heading {
      margin-bottom: 1.2rem;
    }

    .section-heading h2 {
      color: var(--heading-color);
      font-size: 1.5rem;
      font-weight: 800;
      margin: 0;
    }

    .heading-link {
      color: var(--primary);
      font-size: 0.9rem;
      font-weight: 600;
      display: inline-flex;
      align-items: center;
      gap: 0.35rem;
      transition: gap 0.2s ease;
    }

    .heading-link:hover {
      gap: 0.6rem;
      color: #9cebff;
    }

    .related-card {
      position: relative;
      display: block;
      height: 210px;
      border-radius: var(--radius);
      overflow: hidden;
      border: 1px solid rgba(255, 255, 255, 0.08);
      transition: transform 0.25s ease, box-shadow 0.25s ease;
    }

    .related-card img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      transition: transform 0.4s ease;
    }

    .related-card:hover {
      transform: translateY(-5px);
      box-shadow: 0 16px 36px rgba(0, 0, 0, 0.45), var(--shadow-glow);
    }

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

    .related-overlay {
      position: absolute;
      inset: 0;
      background: linear-gradient(180deg, transparent 20%, rgba(4, 7, 13, 0.88) 100%);
    }

    .related-info {
      position: absolute;
      left: 1rem;
      right: 1rem;
      bottom: 0.9rem;
      z-index: 2;
    }

    .related-tag {
      display: inline-block;
      font-size: 0.75rem;
      color: #ffffff;
      background: linear-gradient(135deg, rgba(var(--primary-rgb), 0.8), rgba(var(--secondary-rgb), 0.8));
      border-radius: 50px;
      padding: 0.15rem 0.6rem;
      margin-bottom: 0.4rem;
      font-weight: 600;
    }

    .related-info h3 {
      color: #ffffff;
      font-size: 1rem;
      font-weight: 700;
      margin: 0;
      line-height: 1.4;
      text-shadow: 0 2px 12px rgba(0, 0, 0, 0.6);
    }

    /* Sidebar */
    .article-sidebar {
      position: sticky;
      top: 150px;
      display: flex;
      flex-direction: column;
      gap: 1.4rem;
    }

    .side-widget {
      background: linear-gradient(160deg, rgba(255, 255, 255, 0.045), rgba(255, 255, 255, 0.015));
      border: 1px solid rgba(255, 255, 255, 0.08);
      border-radius: var(--radius);
      padding: 1.5rem;
      transition: border-color 0.25s ease, box-shadow 0.25s ease;
    }

    .side-widget:hover {
      border-color: rgba(var(--primary-rgb), 0.25);
      box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
    }

    .widget-icon {
      width: 48px;
      height: 48px;
      border-radius: 14px;
      display: inline-flex;
      align-items: center;
      justify-content: center;
      background: linear-gradient(135deg, rgba(var(--primary-rgb), 0.18), rgba(var(--secondary-rgb), 0.18));
      border: 1px solid rgba(var(--primary-rgb), 0.25);
      color: var(--primary);
      font-size: 1.2rem;
      margin-bottom: 0.8rem;
    }

    .side-widget h3 {
      color: var(--heading-color);
      font-size: 1.25rem;
      font-weight: 800;
      margin-bottom: 0.35rem;
    }

    .side-widget p {
      color: var(--text-muted);
      font-size: 0.9rem;
      margin-bottom: 1rem;
    }

    .side-guide-list {
      list-style: none;
      margin: 0;
      padding: 0;
    }

    .side-guide-list li {
      margin-bottom: 0.5rem;
    }

    .side-guide-list a {
      display: flex;
      align-items: center;
      gap: 0.6rem;
      padding: 0.65rem 0.85rem;
      background: rgba(255, 255, 255, 0.04);
      border: 1px solid rgba(255, 255, 255, 0.06);
      border-radius: var(--radius-sm);
      color: var(--text-main);
      font-size: 0.92rem;
      transition: all 0.22s ease;
    }

    .side-guide-list a:hover {
      color: var(--primary);
      background: rgba(var(--primary-rgb), 0.08);
      border-color: rgba(var(--primary-rgb), 0.3);
      transform: translateX(3px);
    }

    .side-guide-list i {
      color: var(--primary);
      font-size: 0.9rem;
      width: 18px;
      text-align: center;
    }

    .side-widget h4 {
      color: var(--heading-color);
      font-size: 1rem;
      font-weight: 700;
      margin-bottom: 1rem;
      letter-spacing: 0.02em;
    }

    .reco-card {
      display: flex;
      align-items: center;
      gap: 0.8rem;
      padding: 0.7rem;
      background: rgba(255, 255, 255, 0.04);
      border: 1px solid rgba(255, 255, 255, 0.06);
      border-radius: var(--radius-sm);
      margin-bottom: 0.6rem;
      transition: all 0.22s ease;
    }

    .reco-card:last-child {
      margin-bottom: 0;
    }

    .reco-card:hover {
      background: rgba(var(--primary-rgb), 0.08);
      border-color: rgba(var(--primary-rgb), 0.3);
      transform: translateX(3px);
    }

    .reco-card img {
      width: 74px;
      height: 60px;
      border-radius: 8px;
      object-fit: cover;
    }

    .reco-card strong {
      display: block;
      color: rgba(255, 255, 255, 0.82);
      font-size: 0.88rem;
      line-height: 1.4;
    }

    .reco-badge {
      display: inline-block;
      font-size: 0.7rem;
      color: var(--primary);
      background: rgba(var(--primary-rgb), 0.12);
      border-radius: 50px;
      padding: 0.1rem 0.5rem;
      margin-bottom: 0.25rem;
      font-weight: 600;
    }

    .support-widget {
      text-align: center;
      background: linear-gradient(160deg, rgba(var(--secondary-rgb), 0.09), rgba(var(--primary-rgb), 0.05));
      border-color: rgba(var(--primary-rgb), 0.18);
    }

    .support-widget .widget-icon {
      margin-left: auto;
      margin-right: auto;
    }

    .support-widget h4 {
      margin-top: 0.3rem;
    }

    .support-widget p {
      margin-bottom: 1.1rem;
    }

    /* FAQ */
    .faq-section {
      padding: 3.5rem 0 1.5rem;
    }

    .faq-section .section-title {
      color: var(--heading-color);
      font-size: 1.8rem;
      font-weight: 800;
      text-align: center;
      margin-bottom: 0.5rem;
    }

    .faq-section .section-subtitle {
      text-align: center;
      color: var(--text-muted);
      margin-bottom: 2.2rem;
    }

    .faq-item {
      background: rgba(255, 255, 255, 0.04);
      border: 1px solid rgba(255, 255, 255, 0.07);
      border-radius: var(--radius);
      padding: 1.3rem 1.5rem;
      margin-bottom: 0.9rem;
      transition: border-color 0.2s ease, box-shadow 0.2s ease;
    }

    .faq-item:hover {
      border-color: rgba(var(--primary-rgb), 0.3);
      box-shadow: 0 8px 24px rgba(0, 0, 0, 0.2);
    }

    .faq-question {
      display: flex;
      justify-content: space-between;
      align-items: center;
      gap: 1rem;
      cursor: pointer;
      color: var(--heading-color);
      font-weight: 700;
      font-size: 1.02rem;
      margin: 0;
    }

    .faq-question i {
      color: var(--primary);
      font-size: 0.9rem;
      flex-shrink: 0;
    }

    .faq-answer {
      color: var(--text-muted);
      font-size: 0.94rem;
      line-height: 1.9;
      margin-top: 0.7rem;
      padding-top: 0.7rem;
      border-top: 1px dashed rgba(255, 255, 255, 0.08);
    }

    /* CTA Section */
    .cta-section {
      padding: 2.5rem 0 0;
    }

    .cta-box {
      background: linear-gradient(140deg, rgba(var(--primary-rgb), 0.14), rgba(var(--secondary-rgb), 0.08)), linear-gradient(160deg, #0c1321, #0a101c);
      border: 1px solid rgba(var(--primary-rgb), 0.25);
      border-radius: var(--radius-lg);
      padding: 3rem 2.5rem;
      text-align: center;
      position: relative;
      overflow: hidden;
      box-shadow: var(--shadow-card);
    }

    .cta-box::before {
      content: "";
      position: absolute;
      width: 300px;
      height: 300px;
      border-radius: 50%;
      background: rgba(var(--primary-rgb), 0.12);
      top: -160px;
      left: -80px;
      filter: blur(70px);
    }

    .cta-box::after {
      content: "";
      position: absolute;
      width: 240px;
      height: 240px;
      border-radius: 50%;
      background: rgba(var(--secondary-rgb), 0.1);
      bottom: -120px;
      right: -60px;
      filter: blur(70px);
    }

    .cta-box h2 {
      color: var(--heading-color);
      font-size: 2rem;
      font-weight: 800;
      margin-bottom: 0.7rem;
      position: relative;
      z-index: 1;
    }

    .cta-box p {
      color: var(--text-muted);
      max-width: 560px;
      margin: 0 auto 1.6rem;
      position: relative;
      z-index: 1;
    }

    .cta-actions {
      display: flex;
      justify-content: center;
      flex-wrap: wrap;
      gap: 0.9rem;
      position: relative;
      z-index: 1;
    }

    /* Footer */
    .site-footer {
      background: #05080f;
      border-top: 1px solid rgba(255, 255, 255, 0.07);
      padding: 3.5rem 0 0;
      margin-top: 4rem;
    }

    .footer-brand {
      margin-bottom: 1rem;
    }

    .footer-about {
      color: var(--text-muted);
      font-size: 0.9rem;
      margin-top: 1rem;
      max-width: 360px;
      line-height: 1.9;
    }

    .footer-title {
      color: var(--heading-color);
      font-size: 1rem;
      font-weight: 700;
      margin-bottom: 1.1rem;
    }

    .footer-links {
      display: flex;
      flex-direction: column;
      gap: 0.55rem;
    }

    .footer-links a {
      color: var(--text-muted);
      font-size: 0.9rem;
      transition: color 0.2s ease, padding-left 0.2s ease;
    }

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

    .footer-contact-item {
      display: flex;
      align-items: center;
      gap: 0.6rem;
      color: var(--text-muted);
      font-size: 0.9rem;
      margin-bottom: 0.6rem;
      word-break: break-all;
    }

    .footer-contact-item i {
      color: var(--primary);
      width: 16px;
      text-align: center;
    }

    .footer-bottom {
      border-top: 1px solid rgba(255, 255, 255, 0.06);
      margin-top: 2.2rem;
      padding: 1.2rem 0;
      display: flex;
      flex-direction: column;
      align-items: center;
      justify-content: center;
      gap: 0.3rem;
      color: rgba(255, 255, 255, 0.45);
      font-size: 0.82rem;
    }

    /* Not Found */
    .not-found-zone {
      padding: 3rem 0 5rem;
      text-align: center;
    }

    .not-found-card {
      display: inline-block;
      background: rgba(255, 255, 255, 0.045);
      border: 1px solid rgba(255, 255, 255, 0.1);
      border-radius: var(--radius-lg);
      padding: 3.5rem 4rem;
      box-shadow: var(--shadow-card);
    }

    .nf-icon {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      width: 74px;
      height: 74px;
      border-radius: 50%;
      background: rgba(var(--primary-rgb), 0.1);
      border: 1px solid rgba(var(--primary-rgb), 0.25);
      color: var(--primary);
      font-size: 1.8rem;
      margin-bottom: 1.5rem;
    }

    .not-found-card h2 {
      color: var(--heading-color);
      font-size: 1.6rem;
      font-weight: 800;
      margin-bottom: 0.6rem;
    }

    .not-found-card p {
      color: var(--text-muted);
      margin-bottom: 1.5rem;
    }

    /* Responsive */
    @media (max-width: 991.98px) {
      .page-banner {
        padding: 3.5rem 0;
      }
      .page-banner h1 {
        font-size: 2.1rem;
      }
      .content-card {
        padding: 1.8rem 1.6rem;
      }
      .article-sidebar {
        position: static;
        margin-top: 1rem;
      }
      .related-card {
        height: 190px;
      }
      .brand-text {
        font-size: 1.1rem;
      }
    }

    @media (max-width: 767.98px) {
      .header-top {
        padding: 0.7rem 0;
      }
      .brand-mark {
        width: 38px;
        height: 38px;
        border-radius: 10px;
        font-size: 0.9rem;
      }
      .brand-text {
        font-size: 1rem;
      }
      .page-banner {
        padding: 2.8rem 0;
      }
      .page-banner h1 {
        font-size: 1.6rem;
      }
      .page-main {
        padding: 1.5rem 0 2rem;
      }
      .content-card h1 {
        font-size: 1.4rem;
      }
      .content-card {
        padding: 1.3rem 1.1rem;
        border-radius: var(--radius);
      }
      .section-heading h2 {
        font-size: 1.25rem;
      }
      .cta-box {
        padding: 2rem 1.2rem;
      }
      .cta-box h2 {
        font-size: 1.4rem;
      }
      .faq-section .section-title {
        font-size: 1.45rem;
      }
      .footer-bottom {
        text-align: center;
        padding: 1rem 1rem;
      }
      .not-found-card {
        padding: 2rem 1.2rem;
        width: 100%;
      }
    }

    @media (max-width: 575.98px) {
      .page-banner h1 {
        font-size: 1.4rem;
      }
      .meta-chip {
        padding: 0.3rem 0.7rem;
        font-size: 0.78rem;
      }
      .content-meta {
        gap: 0.7rem;
        font-size: 0.82rem;
      }
      .related-card {
        height: 180px;
      }
      .faq-item {
        padding: 1rem 1.1rem;
      }
      .cta-actions .btn {
        width: 100%;
      }
    }