/* roulang page: index */
:root {
  --bg-dark: #060910;
  --bg-deep: #0a0e17;
  --bg-card: #111827;
  --bg-card-hover: #1a2440;
  --neon-cyan: #00e5ff;
  --neon-purple: #a78bfa;
  --neon-pink: #ff4d8f;
  --gold: #ffd166;
  --text-primary: #f1f5f9;
  --text-secondary: #94a3b8;
  --border: #1e2a3d;
  --radius: 18px;
  --radius-sm: 12px;
  --shadow: 0 24px 70px rgba(0, 0, 0, 0.45);
  --shadow-hover: 0 30px 90px rgba(0, 229, 255, 0.12);
  --glow-cyan: 0 0 40px rgba(0, 229, 255, 0.18);
  --glow-purple: 0 0 40px rgba(167, 139, 250, 0.16);
  --nav-h: 76px;
  --space-section: 110px;
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  background: var(--bg-dark);
  color: var(--text-primary);
  line-height: 1.7;
  font-size: 16px;
  overflow-x: hidden;
}

a {
  text-decoration: none;
  color: inherit;
  transition: color 0.3s;
}

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

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

.container {
  max-width: 1240px;
  padding-left: 22px;
  padding-right: 22px;
}

section {
  position: relative;
}

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

.section-tag {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  letter-spacing: 0.14em;
  font-weight: 600;
  color: var(--neon-cyan);
  text-transform: uppercase;
  background: rgba(0, 229, 255, 0.07);
  border: 1px solid rgba(0, 229, 255, 0.22);
  border-radius: 999px;
  padding: 6px 16px;
  margin-bottom: 16px;
}

.section-head h2 {
  font-size: clamp(28px, 3.4vw, 42px);
  font-weight: 700;
  color: var(--text-primary);
  letter-spacing: -0.02em;
  line-height: 1.25;
}

.section-head p {
  color: var(--text-secondary);
  font-size: 16px;
  margin-top: 10px;
  max-width: 640px;
}

.section-more {
  color: var(--neon-cyan);
  font-weight: 600;
  font-size: 15px;
  white-space: nowrap;
  transition: gap 0.3s;
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.section-more:hover {
  color: #fff;
  gap: 10px;
}

/* 导航 */
.site-header {
  position: sticky;
  top: 0;
  z-index: 1050;
  height: var(--nav-h);
  background: rgba(6, 9, 16, 0.82);
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
  border-bottom: 1px solid rgba(0, 229, 255, 0.12);
  transition: box-shadow 0.3s, background 0.3s;
}

.site-header.scrolled {
  background: rgba(4, 6, 12, 0.95);
  box-shadow: 0 10px 40px rgba(0, 0, 0, 0.5);
}

.header-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: var(--nav-h);
  gap: 20px;
}

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

.brand-mark {
  width: 36px;
  height: 36px;
  border-radius: 10px;
  background: linear-gradient(135deg, rgba(0, 229, 255, 0.18), rgba(167, 139, 250, 0.18));
  display: inline-flex;
  align-items: center;
  justify-content: center;
  color: var(--neon-cyan);
  font-size: 16px;
  border: 1px solid rgba(0, 229, 255, 0.3);
  box-shadow: 0 0 22px rgba(0, 229, 255, 0.15);
}

.brand-text {
  font-size: 19px;
  font-weight: 700;
  color: #fff;
  letter-spacing: 0.01em;
  white-space: nowrap;
}

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

.nav-link {
  position: relative;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: var(--text-secondary);
  font-size: 15px;
  font-weight: 500;
  padding: 10px 18px;
  border-radius: 10px;
  transition: color 0.3s, background 0.3s;
}

.nav-link i {
  font-size: 14px;
  opacity: 0.8;
}

.nav-link::after {
  content: "";
  position: absolute;
  left: 50%;
  bottom: 2px;
  transform: translateX(-50%);
  width: 0;
  height: 2px;
  border-radius: 2px;
  background: linear-gradient(90deg, var(--neon-cyan), var(--neon-purple));
  box-shadow: 0 0 14px rgba(0, 229, 255, 0.6);
  transition: width 0.35s ease;
}

.nav-link:hover,
.nav-link.active {
  color: #fff;
  background: rgba(255, 255, 255, 0.04);
}

.nav-link.active::after,
.nav-link:hover::after {
  width: 26px;
}

.nav-link.active {
  text-shadow: 0 0 18px rgba(0, 229, 255, 0.45);
}

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

.btn-nav {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: linear-gradient(135deg, var(--neon-cyan), #22d3ee);
  color: #04121a;
  font-weight: 700;
  font-size: 14px;
  padding: 10px 20px;
  border-radius: 999px;
  box-shadow: 0 8px 30px rgba(0, 229, 255, 0.28);
  transition: transform 0.3s, box-shadow 0.3s;
  white-space: nowrap;
}

.btn-nav:hover {
  transform: translateY(-2px);
  color: #04121a;
  box-shadow: 0 12px 36px rgba(0, 229, 255, 0.4);
}

.nav-toggle {
  display: none;
  width: 44px;
  height: 44px;
  border-radius: 12px;
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(255, 255, 255, 0.12);
  color: #fff;
  font-size: 18px;
  align-items: center;
  justify-content: center;
}

/* Hero */
.hero {
  position: relative;
  min-height: 86vh;
  display: flex;
  align-items: center;
  background-size: cover;
  background-position: center;
  padding: 120px 0;
}

.hero-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(6, 9, 16, 0.72) 0%, rgba(6, 9, 16, 0.9) 100%);
}

.hero-content {
  position: relative;
  z-index: 2;
  text-align: center;
  max-width: 900px;
  margin: 0 auto;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(0, 229, 255, 0.1);
  border: 1px solid rgba(0, 229, 255, 0.35);
  color: var(--neon-cyan);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.16em;
  padding: 8px 20px;
  border-radius: 999px;
  margin-bottom: 24px;
  backdrop-filter: blur(8px);
}

.hero h1 {
  font-size: clamp(38px, 6vw, 68px);
  font-weight: 800;
  line-height: 1.15;
  color: #fff;
  letter-spacing: -0.02em;
  margin-bottom: 18px;
  text-shadow: 0 0 60px rgba(0, 229, 255, 0.2);
}

.hero-sub {
  font-size: clamp(15px, 1.6vw, 19px);
  color: rgba(241, 245, 249, 0.88);
  max-width: 680px;
  margin: 0 auto 36px;
  line-height: 1.8;
}

.hero-countdown {
  display: flex;
  justify-content: center;
  gap: 16px;
  margin-bottom: 12px;
}

.cd-item {
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: var(--radius-sm);
  padding: 14px 16px;
  min-width: 84px;
  backdrop-filter: blur(10px);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.06);
}

.cd-num {
  display: block;
  font-size: 38px;
  font-weight: 800;
  color: var(--neon-cyan);
  line-height: 1;
  font-variant-numeric: tabular-nums;
  text-shadow: 0 0 24px rgba(0, 229, 255, 0.4);
}

.cd-label {
  display: block;
  color: var(--text-secondary);
  font-size: 13px;
  letter-spacing: 0.08em;
  margin-top: 6px;
}

.cd-caption {
  color: rgba(241, 245, 249, 0.6);
  font-size: 14px;
  margin-bottom: 36px;
  letter-spacing: 0.02em;
}

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

.btn-hero-primary {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: linear-gradient(135deg, var(--neon-cyan), #22d3ee);
  color: #04121a;
  font-weight: 700;
  font-size: 16px;
  padding: 14px 32px;
  border-radius: 999px;
  box-shadow: 0 12px 40px rgba(0, 229, 255, 0.3);
  transition: transform 0.3s, box-shadow 0.3s;
}

.btn-hero-primary:hover {
  transform: translateY(-3px);
  box-shadow: 0 18px 50px rgba(0, 229, 255, 0.45);
  color: #04121a;
}

.btn-hero-ghost {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(255, 255, 255, 0.24);
  color: var(--text-primary);
  font-weight: 600;
  font-size: 16px;
  padding: 14px 32px;
  border-radius: 999px;
  backdrop-filter: blur(8px);
  transition: transform 0.3s, border-color 0.3s, background 0.3s;
}

.btn-hero-ghost:hover {
  border-color: var(--neon-cyan);
  background: rgba(0, 229, 255, 0.08);
  transform: translateY(-3px);
  color: var(--neon-cyan);
}

/* 数据看板 */
.stats-section {
  position: relative;
  z-index: 3;
  margin-top: -46px;
  padding-bottom: 20px;
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}

.stat-item {
  background: rgba(17, 24, 39, 0.9);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: var(--radius);
  padding: 28px 22px;
  text-align: center;
  backdrop-filter: blur(16px);
  box-shadow: var(--shadow);
  transition: transform 0.3s, border-color 0.3s;
}

.stat-item:hover {
  transform: translateY(-6px);
  border-color: rgba(0, 229, 255, 0.35);
}

.stat-num {
  font-size: 42px;
  font-weight: 800;
  color: var(--gold);
  line-height: 1;
  font-variant-numeric: tabular-nums;
}

.stat-plus {
  color: var(--gold);
  font-size: 26px;
  font-weight: 700;
  margin-left: 2px;
}

.stat-label {
  display: block;
  color: var(--text-secondary);
  font-size: 14px;
  margin-top: 10px;
  letter-spacing: 0.04em;
}

/* 核心能力 */
.feature-section {
  background: linear-gradient(180deg, var(--bg-dark), var(--bg-deep));
}

.feature-card {
  height: 100%;
  background: rgba(17, 24, 39, 0.75);
  border: 1px solid rgba(255, 255, 255, 0.07);
  border-radius: var(--radius);
  padding: 30px 26px;
  transition: transform 0.35s, border-color 0.35s, box-shadow 0.35s;
}

.feature-card:hover {
  transform: translateY(-8px);
  border-color: rgba(0, 229, 255, 0.3);
  box-shadow: var(--shadow-hover);
}

.feature-icon {
  width: 54px;
  height: 54px;
  border-radius: 14px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 22px;
  margin-bottom: 20px;
  background: rgba(0, 229, 255, 0.1);
  color: var(--neon-cyan);
  border: 1px solid rgba(0, 229, 255, 0.22);
}

.feature-card.purple .feature-icon {
  background: rgba(167, 139, 250, 0.1);
  color: var(--neon-purple);
  border-color: rgba(167, 139, 250, 0.24);
}

.feature-card.pink .feature-icon {
  background: rgba(255, 77, 143, 0.1);
  color: var(--neon-pink);
  border-color: rgba(255, 77, 143, 0.24);
}

.feature-card h3 {
  font-size: 19px;
  font-weight: 700;
  margin-bottom: 10px;
}

.feature-card p {
  color: var(--text-secondary);
  font-size: 14px;
  line-height: 1.7;
  margin-bottom: 0;
}

/* 分类入口 */
.category-section {
  background: var(--bg-deep);
}

.category-card {
  position: relative;
  display: block;
  min-height: 320px;
  border-radius: var(--radius);
  background-size: cover;
  background-position: center;
  overflow: hidden;
  border: 1px solid rgba(255, 255, 255, 0.1);
  transition: transform 0.4s, box-shadow 0.4s;
}

.category-card::before {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(200deg, rgba(6, 9, 16, 0.15) 0%, rgba(6, 9, 16, 0.85) 100%);
  transition: background 0.4s;
}

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

.category-card:hover::before {
  background: linear-gradient(200deg, rgba(6, 9, 16, 0.05) 0%, rgba(6, 9, 16, 0.9) 100%);
}

.category-inner {
  position: relative;
  z-index: 2;
  padding: 36px;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  min-height: 320px;
}

.category-chip {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  width: fit-content;
  background: rgba(0, 229, 255, 0.14);
  border: 1px solid rgba(0, 229, 255, 0.3);
  color: var(--neon-cyan);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.1em;
  padding: 5px 14px;
  border-radius: 999px;
  margin-bottom: 14px;
}

.category-inner h3 {
  font-size: 28px;
  font-weight: 800;
  color: #fff;
  margin-bottom: 10px;
}

.category-inner p {
  color: rgba(241, 245, 249, 0.82);
  font-size: 15px;
  max-width: 420px;
  margin-bottom: 20px;
}

.category-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: var(--neon-cyan);
  font-weight: 600;
  font-size: 15px;
  transition: gap 0.3s;
}

.category-card:hover .category-link {
  gap: 14px;
}

/* 最新资讯 */
.news-section {
  background: var(--bg-dark);
}

.news-card {
  display: block;
  height: 100%;
  background: rgba(17, 24, 39, 0.7);
  border: 1px solid rgba(255, 255, 255, 0.07);
  border-radius: var(--radius);
  padding: 26px;
  transition: transform 0.3s, border-color 0.3s, box-shadow 0.3s;
}

.news-card:hover {
  transform: translateY(-5px);
  border-color: rgba(0, 229, 255, 0.3);
  box-shadow: var(--shadow-hover);
  background: rgba(17, 24, 39, 0.92);
}

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

.news-cat {
  background: rgba(0, 229, 255, 0.1);
  border: 1px solid rgba(0, 229, 255, 0.2);
  color: var(--neon-cyan);
  font-size: 12px;
  font-weight: 600;
  padding: 4px 14px;
  border-radius: 999px;
  letter-spacing: 0.04em;
}

.news-date {
  color: var(--text-secondary);
  font-size: 13px;
}

.news-card h3 {
  font-size: 19px;
  font-weight: 700;
  color: var(--text-primary);
  line-height: 1.5;
  margin-bottom: 10px;
  transition: color 0.3s;
}

.news-card:hover h3 {
  color: var(--neon-cyan);
}

.news-card p {
  color: var(--text-secondary);
  font-size: 14px;
  line-height: 1.7;
  margin-bottom: 16px;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.news-more {
  color: var(--neon-cyan);
  font-size: 14px;
  font-weight: 600;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  transition: gap 0.3s;
}

.news-card:hover .news-more {
  gap: 12px;
}

.empty-tip {
  background: rgba(255, 255, 255, 0.04);
  border: 1px dashed rgba(255, 255, 255, 0.14);
  border-radius: var(--radius);
  padding: 44px;
  text-align: center;
  color: var(--text-secondary);
  font-size: 16px;
}

/* 热门主题 横向滚动 */
.theme-section {
  background: var(--bg-deep);
  overflow: hidden;
}

.theme-scroll {
  gap: 22px;
  padding-bottom: 10px;
}

.theme-scroll::-webkit-scrollbar {
  height: 6px;
}

.theme-scroll::-webkit-scrollbar-track {
  background: rgba(255, 255, 255, 0.04);
  border-radius: 99px;
}

.theme-scroll::-webkit-scrollbar-thumb {
  background: rgba(0, 229, 255, 0.3);
  border-radius: 99px;
}

.theme-card {
  position: relative;
  flex: 0 0 300px;
  height: 220px;
  border-radius: var(--radius);
  background-size: cover;
  background-position: center;
  overflow: hidden;
  border: 1px solid rgba(255, 255, 255, 0.1);
  transition: transform 0.3s, box-shadow 0.3s, border-color 0.3s;
}

.theme-card:hover {
  transform: translateY(-6px);
  border-color: rgba(0, 229, 255, 0.35);
  box-shadow: var(--shadow-hover);
}

.theme-card::before {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(190deg, rgba(6, 9, 16, 0.1), rgba(6, 9, 16, 0.85));
}

.theme-card-inner {
  position: absolute;
  z-index: 2;
  left: 20px;
  right: 20px;
  bottom: 20px;
}

.theme-card-inner .theme-chip {
  display: inline-block;
  background: rgba(0, 229, 255, 0.16);
  border: 1px solid rgba(0, 229, 255, 0.28);
  color: var(--neon-cyan);
  font-size: 12px;
  font-weight: 600;
  padding: 4px 12px;
  border-radius: 999px;
  margin-bottom: 10px;
}

.theme-card-inner h3 {
  color: #fff;
  font-size: 20px;
  font-weight: 700;
  margin-bottom: 6px;
}

.theme-card-inner p {
  color: rgba(241, 245, 249, 0.75);
  font-size: 13px;
}

/* 观赛流程 */
.journey-section {
  background-size: cover;
  background-position: center;
  position: relative;
}

.journey-section::before {
  content: "";
  position: absolute;
  inset: 0;
  background: rgba(6, 9, 16, 0.88);
}

.journey-section .container {
  position: relative;
  z-index: 2;
}

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

.journey-item {
  position: relative;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: var(--radius);
  padding: 32px 24px 28px;
  backdrop-filter: blur(8px);
  transition: border-color 0.3s, transform 0.3s;
}

.journey-item:hover {
  border-color: rgba(0, 229, 255, 0.35);
  transform: translateY(-5px);
}

.journey-step {
  position: absolute;
  top: -18px;
  left: 22px;
  width: 40px;
  height: 40px;
  border-radius: 12px;
  background: linear-gradient(135deg, var(--neon-cyan), #22d3ee);
  color: #04121a;
  font-weight: 800;
  font-size: 17px;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 10px 30px rgba(0, 229, 255, 0.3);
}

.journey-item h3 {
  color: #fff;
  font-size: 18px;
  font-weight: 700;
  margin: 14px 0 10px;
}

.journey-item p {
  color: var(--text-secondary);
  font-size: 14px;
  line-height: 1.7;
  margin: 0;
}

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

.faq-wrap {
  max-width: 860px;
  margin: 0 auto;
}

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

.accordion-item {
  background: rgba(17, 24, 39, 0.7);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: var(--radius-sm);
  overflow: hidden;
  transition: border-color 0.3s;
}

.accordion-item:focus-within {
  border-color: rgba(0, 229, 255, 0.35);
}

.accordion-button {
  background: transparent;
  color: var(--text-primary);
  font-size: 16px;
  font-weight: 600;
  padding: 20px 24px;
  box-shadow: none;
}

.accordion-button:not(.collapsed) {
  background: rgba(0, 229, 255, 0.05);
  color: var(--neon-cyan);
}

.accordion-button::after {
  background-image: none;
  content: "\f078";
  font-family: "Font Awesome 6 Free";
  font-weight: 900;
  font-size: 14px;
  color: var(--neon-cyan);
  transition: transform 0.3s;
}

.accordion-button:not(.collapsed)::after {
  transform: rotate(180deg);
  color: var(--neon-cyan);
}

.accordion-body {
  color: var(--text-secondary);
  font-size: 15px;
  padding: 0 24px 22px;
  line-height: 1.8;
}

/* CTA */
.cta-section {
  padding: 60px 0 100px;
  background: var(--bg-dark);
}

.cta-inner {
  position: relative;
  background-size: cover;
  background-position: center;
  border-radius: 24px;
  padding: 80px 40px;
  text-align: center;
  overflow: hidden;
  border: 1px solid rgba(255, 255, 255, 0.12);
}

.cta-inner::before {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(120deg, rgba(6, 9, 16, 0.88), rgba(6, 9, 16, 0.7));
}

.cta-inner > * {
  position: relative;
  z-index: 2;
}

.cta-inner h2 {
  font-size: clamp(28px, 3.6vw, 44px);
  font-weight: 800;
  color: #fff;
  margin-bottom: 16px;
}

.cta-inner p {
  color: rgba(241, 245, 249, 0.8);
  font-size: 17px;
  max-width: 560px;
  margin: 0 auto 32px;
}

.btn-cta {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  background: linear-gradient(135deg, var(--gold), #fbbf24);
  color: #1a1405;
  font-weight: 800;
  font-size: 16px;
  padding: 15px 38px;
  border-radius: 999px;
  box-shadow: 0 14px 40px rgba(255, 209, 102, 0.28);
  transition: transform 0.3s, box-shadow 0.3s;
}

.btn-cta:hover {
  transform: translateY(-3px);
  color: #1a1405;
  box-shadow: 0 18px 50px rgba(255, 209, 102, 0.4);
}

/* Footer */
.site-footer {
  background: #04060c;
  border-top: 1px solid rgba(255, 255, 255, 0.06);
  padding: 70px 0 26px;
}

.footer-top {
  display: grid;
  grid-template-columns: 1.6fr 1fr 1fr;
  gap: 48px;
  padding-bottom: 44px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
}

.footer-brand .brand-text {
  font-size: 22px;
  display: block;
  margin-bottom: 14px;
}

.footer-brand p {
  color: var(--text-secondary);
  font-size: 14px;
  max-width: 340px;
  line-height: 1.8;
}

.footer-links h4 {
  color: #fff;
  font-size: 16px;
  font-weight: 700;
  margin-bottom: 18px;
}

.footer-links a {
  display: block;
  color: var(--text-secondary);
  font-size: 14px;
  padding: 6px 0;
  transition: color 0.3s, padding-left 0.3s;
}

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

.footer-bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  padding-top: 28px;
  flex-wrap: wrap;
}

.footer-bottom p {
  color: rgba(148, 163, 184, 0.8);
  font-size: 13px;
  margin: 0;
}

/* 响应式 */
@media (max-width: 992px) {
  :root {
    --space-section: 80px;
  }

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

  .journey-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 18px;
  }

  .nav-toggle {
    display: inline-flex;
  }

  .nav-collapse {
    position: absolute;
    top: var(--nav-h);
    left: 0;
    right: 0;
    background: rgba(6, 9, 16, 0.98);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid rgba(0, 229, 255, 0.15);
    padding: 16px 22px 22px;
    display: none;
    box-shadow: 0 30px 60px rgba(0, 0, 0, 0.5);
  }

  .nav-collapse.open {
    display: block;
  }

  .main-nav {
    flex-direction: column;
    align-items: stretch;
    gap: 6px;
  }

  .nav-link {
    padding: 14px 16px;
    border-radius: 12px;
  }

  .nav-link::after {
    display: none;
  }

  .btn-nav {
    display: none;
  }
}

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

  .hero {
    min-height: 76vh;
    padding: 90px 0;
  }

  .hero-countdown {
    gap: 10px;
  }

  .cd-item {
    padding: 12px 10px;
    min-width: 68px;
  }

  .cd-num {
    font-size: 28px;
  }

  .stats-grid {
    gap: 12px;
  }

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

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

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

  .category-inner {
    padding: 26px;
  }

  .category-card,
  .category-inner {
    min-height: 260px;
  }
}

@media (max-width: 576px) {
  :root {
    --space-section: 54px;
  }

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

  .brand-mark {
    width: 32px;
    height: 32px;
    font-size: 14px;
  }

  .hero h1 {
    font-size: 34px;
  }

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

  .hero-countdown {
    gap: 8px;
  }

  .cd-item {
    min-width: 60px;
    padding: 10px 6px;
  }

  .cd-num {
    font-size: 24px;
  }

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

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

  .theme-card {
    flex-basis: 250px;
  }

  .cta-inner {
    padding: 50px 20px;
  }

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

/* roulang page: category1 */
:root {
    --bg-deep: #070a10;
    --bg-body: #0b0f16;
    --bg-card: #111823;
    --bg-soft: #161f2c;
    --border: rgba(255,255,255,0.07);
    --border-neon: rgba(0,229,255,0.30);
    --text: #e8edf5;
    --text-muted: #8a94a6;
    --neon: #00e5ff;
    --neon-2: #7c5cff;
    --accent: #ff3c78;
    --gold: #ffc857;
    --success: #2dd4a7;
    --radius-lg: 22px;
    --radius: 18px;
    --radius-sm: 12px;
    --shadow: 0 20px 50px rgba(0,0,0,0.40);
    --shadow-neon: 0 0 36px rgba(0,229,255,0.14);
    --spacer: clamp(3.2rem, 6vw, 6.5rem);
    --font: "PingFang SC","Microsoft YaHei","Noto Sans SC",-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,sans-serif;
    --transition: all 0.3s cubic-bezier(0.25,0.46,0.45,0.94);
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font);
    background: var(--bg-body);
    color: var(--text);
    line-height: 1.7;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
}

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

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

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

ul, ol {
    list-style: none;
}

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

.container {
    max-width: 1220px;
    padding-left: 24px;
    padding-right: 24px;
}

/* ===== Header / Nav ===== */
.site-header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(7, 10, 16, 0.85);
    backdrop-filter: blur(18px);
    -webkit-backdrop-filter: blur(18px);
    border-bottom: 1px solid var(--border);
    transition: var(--transition);
}

.site-header.scrolled {
    box-shadow: 0 8px 40px rgba(0,0,0,0.55);
    background: rgba(7, 10, 16, 0.96);
}

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

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

.brand-mark {
    width: 44px;
    height: 44px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--neon), var(--neon-2));
    color: #fff;
    font-size: 18px;
    box-shadow: 0 0 24px rgba(0,229,255,0.35);
}

.brand-text {
    font-size: 1.2rem;
    font-weight: 800;
    letter-spacing: 0.04em;
    background: linear-gradient(90deg, #fff, var(--neon));
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    white-space: nowrap;
}

.nav-collapse {
    display: flex;
    align-items: center;
    gap: 8px;
}

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

.nav-link {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 9px 18px;
    border-radius: 30px;
    font-size: 0.95rem;
    font-weight: 600;
    color: var(--text-muted);
    position: relative;
    transition: var(--transition);
    border: 1px solid transparent;
}

.nav-link::after {
    content: "";
    position: absolute;
    left: 18px;
    right: 18px;
    bottom: 2px;
    height: 2px;
    border-radius: 2px;
    background: linear-gradient(90deg, var(--neon), var(--neon-2));
    opacity: 0;
    transform: scaleX(0.5);
    transition: var(--transition);
}

.nav-link:hover {
    color: var(--text);
    background: rgba(255,255,255,0.04);
}

.nav-link:hover::after {
    opacity: 0.7;
    transform: scaleX(1);
}

.nav-link.active {
    color: #fff;
    background: rgba(0,229,255,0.10);
    border-color: var(--border-neon);
    box-shadow: 0 0 20px rgba(0,229,255,0.10);
}

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

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

.btn-nav {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 9px 20px;
    border-radius: 30px;
    background: linear-gradient(135deg, var(--neon), var(--neon-2));
    color: #fff;
    font-size: 0.9rem;
    font-weight: 700;
    border: none;
    cursor: pointer;
    box-shadow: 0 4px 18px rgba(0,229,255,0.25);
    transition: var(--transition);
}

.btn-nav:hover {
    color: #fff;
    transform: translateY(-2px);
    box-shadow: 0 8px 28px rgba(0,229,255,0.35);
}

.nav-toggle {
    width: 44px;
    height: 44px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 12px;
    background: rgba(255,255,255,0.05);
    border: 1px solid var(--border);
    color: var(--text);
    font-size: 1.1rem;
    cursor: pointer;
    transition: var(--transition);
    display: none;
}

.nav-toggle:hover {
    background: rgba(255,255,255,0.1);
    color: var(--neon);
}

/* ===== Hero ===== */
.page-hero {
    position: relative;
    min-height: 520px;
    display: flex;
    align-items: center;
    padding-top: 140px;
    padding-bottom: 90px;
    background-size: cover;
    background-position: center center;
    overflow: hidden;
}

.page-hero::before {
    content: "";
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, rgba(7,10,16,0.92) 0%, rgba(7,10,16,0.72) 45%, rgba(0,229,255,0.18) 100%);
    z-index: 1;
}

.page-hero::after {
    content: "";
    position: absolute;
    bottom: -1px;
    left: 0;
    right: 0;
    height: 80px;
    background: linear-gradient(180deg, transparent, var(--bg-body));
    z-index: 1;
}

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

.breadcrumb-custom {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 0.85rem;
    color: var(--text-muted);
    margin-bottom: 24px;
}

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

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

.hero-tag-line {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 8px 18px;
    border-radius: 30px;
    background: rgba(0,229,255,0.10);
    border: 1px solid var(--border-neon);
    color: var(--neon);
    font-size: 0.85rem;
    font-weight: 700;
    letter-spacing: 0.06em;
    margin-bottom: 22px;
    box-shadow: var(--shadow-neon);
}

.page-hero h1 {
    font-size: clamp(2.2rem, 5vw, 3.8rem);
    font-weight: 900;
    line-height: 1.15;
    letter-spacing: 0.02em;
    margin-bottom: 20px;
    background: linear-gradient(90deg, #fff 20%, var(--neon));
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}

.page-hero p {
    font-size: 1.15rem;
    color: var(--text-muted);
    max-width: 620px;
    margin-bottom: 32px;
}

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

.btn-neon, .btn-ghost {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 14px 30px;
    border-radius: 40px;
    font-size: 0.95rem;
    font-weight: 700;
    transition: var(--transition);
    border: 1px solid transparent;
    cursor: pointer;
}

.btn-neon {
    background: linear-gradient(135deg, var(--neon), var(--neon-2));
    color: #fff;
    box-shadow: 0 8px 30px rgba(0,229,255,0.25);
}

.btn-neon:hover {
    color: #fff;
    transform: translateY(-3px);
    box-shadow: 0 12px 40px rgba(0,229,255,0.4);
}

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

.btn-ghost:hover {
    border-color: var(--neon);
    color: var(--neon);
    transform: translateY(-3px);
    box-shadow: var(--shadow-neon);
}

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

.section-head {
    text-align: center;
    max-width: 720px;
    margin: 0 auto 56px;
}

.section-tag {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 6px 16px;
    border-radius: 30px;
    background: rgba(0,229,255,0.08);
    border: 1px solid var(--border-neon);
    color: var(--neon);
    font-size: 0.8rem;
    font-weight: 700;
    letter-spacing: 0.08em;
    margin-bottom: 16px;
}

.section-head h2 {
    font-size: clamp(1.7rem, 3.5vw, 2.6rem);
    font-weight: 800;
    line-height: 1.2;
    margin-bottom: 16px;
}

.section-head p {
    color: var(--text-muted);
    font-size: 1rem;
}

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

.intro-card {
    background: linear-gradient(145deg, var(--bg-card), rgba(17,24,35,0.6));
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 32px 26px;
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

.intro-card::before {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--neon), var(--neon-2));
    opacity: 0;
    transition: var(--transition);
}

.intro-card:hover {
    background: var(--bg-soft);
    border-color: var(--border-neon);
    transform: translateY(-6px);
    box-shadow: var(--shadow);
}

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

.intro-icon {
    width: 58px;
    height: 58px;
    border-radius: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.4rem;
    background: rgba(0,229,255,0.12);
    color: var(--neon);
    margin-bottom: 20px;
    border: 1px solid var(--border-neon);
}

.intro-card h3 {
    font-size: 1.2rem;
    font-weight: 700;
    margin-bottom: 10px;
}

.intro-card p {
    color: var(--text-muted);
    font-size: 0.93rem;
    margin-bottom: 0;
}

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

.topic-card {
    position: relative;
    border-radius: var(--radius-lg);
    overflow: hidden;
    border: 1px solid var(--border);
    background: var(--bg-card);
    transition: var(--transition);
    min-height: 300px;
}

.topic-card img {
    width: 100%;
    height: 100%;
    min-height: 300px;
    object-fit: cover;
    transition: transform 0.6s cubic-bezier(0.25,0.46,0.45,0.94);
}

.topic-card:hover img {
    transform: scale(1.08);
}

.topic-overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(180deg, rgba(7,10,16,0.15) 0%, rgba(7,10,16,0.85) 100%);
    display: flex;
    flex-direction: column;
    justify-content: flex-end;
    padding: 26px 22px;
    z-index: 1;
}

.topic-overlay h3 {
    color: #fff;
    font-size: 1.35rem;
    font-weight: 800;
    margin-bottom: 8px;
}

.topic-overlay p {
    color: rgba(255,255,255,0.75);
    font-size: 0.88rem;
    margin-bottom: 14px;
}

.topic-link {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    color: var(--neon);
    font-size: 0.85rem;
    font-weight: 700;
}

.topic-link:hover {
    color: #fff;
}

/* ===== Latest Timeline ===== */
.latest-wrap {
    display: grid;
    grid-template-columns: 1.2fr 0.8fr;
    gap: 32px;
    align-items: start;
}

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

.latest-item {
    display: flex;
    gap: 20px;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 20px 22px;
    transition: var(--transition);
}

.latest-item:hover {
    border-color: var(--border-neon);
    box-shadow: var(--shadow-neon);
    transform: translateX(6px);
}

.latest-date {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    min-width: 76px;
    height: 76px;
    background: rgba(0,229,255,0.08);
    border: 1px solid var(--border-neon);
    border-radius: var(--radius);
    color: var(--neon);
    line-height: 1;
}

.latest-date .day {
    font-size: 1.6rem;
    font-weight: 800;
}

.latest-date .month {
    font-size: 0.8rem;
    letter-spacing: 0.05em;
}

.latest-info h3 {
    font-size: 1.1rem;
    font-weight: 700;
    margin-bottom: 6px;
}

.latest-info p {
    color: var(--text-muted);
    font-size: 0.88rem;
    margin-bottom: 8px;
}

.tag-list {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.tag {
    display: inline-flex;
    align-items: center;
    padding: 4px 12px;
    border-radius: 20px;
    background: rgba(255,255,255,0.05);
    border: 1px solid var(--border);
    color: var(--text-muted);
    font-size: 0.78rem;
    font-weight: 500;
    transition: var(--transition);
}

.tag:hover {
    color: var(--neon);
    border-color: var(--border-neon);
}

.hot-sidebar {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.hot-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 24px;
}

.hot-card h3 {
    font-size: 1.05rem;
    font-weight: 700;
    margin-bottom: 16px;
    display: flex;
    align-items: center;
    gap: 8px;
}

.hot-card h3 i {
    color: var(--gold);
}

.hot-list {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.hot-list li {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 10px 14px;
    border-radius: var(--radius-sm);
    background: rgba(255,255,255,0.02);
    border: 1px solid transparent;
    transition: var(--transition);
}

.hot-list li:hover {
    background: rgba(0,229,255,0.04);
    border-color: var(--border-neon);
}

.hot-rank {
    width: 30px;
    height: 30px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 8px;
    background: rgba(255,255,255,0.05);
    color: var(--text-muted);
    font-size: 0.8rem;
    font-weight: 700;
    flex-shrink: 0;
}

.hot-name {
    flex: 1;
    margin-left: 12px;
    font-size: 0.9rem;
    font-weight: 600;
}

.hot-val {
    color: var(--neon);
    font-size: 0.85rem;
    font-weight: 700;
}

/* ===== Stats ===== */
.stats-section {
    background: var(--bg-deep);
    background-image: url('/assets/images/backpic/back-2.png');
    background-size: cover;
    background-position: center;
    background-attachment: fixed;
    position: relative;
}

.stats-section::before {
    content: "";
    position: absolute;
    inset: 0;
    background: rgba(7,10,16,0.88);
}

.stats-grid {
    position: relative;
    z-index: 1;
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 28px;
}

.stat-item {
    text-align: center;
    padding: 40px 20px;
    background: rgba(255,255,255,0.04);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    backdrop-filter: blur(6px);
    transition: var(--transition);
}

.stat-item:hover {
    border-color: var(--border-neon);
    box-shadow: var(--shadow-neon);
    transform: translateY(-4px);
}

.stat-number {
    font-size: clamp(1.8rem, 4vw, 2.8rem);
    font-weight: 900;
    color: var(--neon);
    line-height: 1.1;
    margin-bottom: 8px;
}

.stat-label {
    color: var(--text-muted);
    font-size: 0.9rem;
    font-weight: 500;
}

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

.process-card {
    text-align: center;
    padding: 34px 22px;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    position: relative;
    transition: var(--transition);
}

.process-card::after {
    content: "\f054";
    font-family: "Font Awesome 6 Free";
    font-weight: 900;
    position: absolute;
    right: -18px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--neon);
    font-size: 0.9rem;
    opacity: 0.5;
    z-index: 2;
}

.process-card:last-child::after {
    display: none;
}

.process-card:hover {
    border-color: var(--border-neon);
    background: var(--bg-soft);
    transform: translateY(-6px);
    box-shadow: var(--shadow);
}

.process-step {
    width: 52px;
    height: 52px;
    margin: 0 auto 20px;
    border-radius: 14px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
    font-weight: 800;
    background: linear-gradient(135deg, var(--neon), var(--neon-2));
    color: #fff;
    box-shadow: 0 6px 20px rgba(0,229,255,0.25);
}

.process-card h3 {
    font-size: 1.1rem;
    font-weight: 700;
    margin-bottom: 10px;
}

.process-card p {
    color: var(--text-muted);
    font-size: 0.88rem;
    margin-bottom: 0;
}

/* ===== Table ===== */
.table-section {
    background: var(--bg-deep);
    background-image: url('/assets/images/backpic/back-3.png');
    background-size: cover;
    background-position: center;
    position: relative;
}

.table-section::before {
    content: "";
    position: absolute;
    inset: 0;
    background: rgba(7,10,16,0.90);
}

.table-wrap {
    position: relative;
    z-index: 1;
    overflow-x: auto;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 10px;
    box-shadow: var(--shadow);
}

.custom-table {
    width: 100%;
    border-collapse: collapse;
    min-width: 760px;
}

.custom-table th {
    padding: 16px 18px;
    font-size: 0.82rem;
    font-weight: 700;
    letter-spacing: 0.06em;
    text-transform: uppercase;
    color: var(--text-muted);
    background: rgba(0,229,255,0.04);
    border-bottom: 1px solid var(--border);
    text-align: left;
}

.custom-table td {
    padding: 16px 18px;
    font-size: 0.92rem;
    border-bottom: 1px solid var(--border);
    vertical-align: middle;
}

.custom-table tbody tr {
    transition: var(--transition);
}

.custom-table tbody tr:hover {
    background: rgba(0,229,255,0.04);
}

.custom-table tbody tr:last-child td {
    border-bottom: none;
}

.team-info {
    display: flex;
    align-items: center;
    gap: 12px;
    font-weight: 700;
}

.team-flag {
    width: 38px;
    height: 38px;
    border-radius: 10px;
    background: rgba(0,229,255,0.12);
    color: var(--neon);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1rem;
    flex-shrink: 0;
    border: 1px solid var(--border-neon);
}

.pill {
    display: inline-flex;
    align-items: center;
    padding: 4px 12px;
    border-radius: 20px;
    font-size: 0.75rem;
    font-weight: 700;
}

.pill-hot {
    background: rgba(255,60,120,0.12);
    border: 1px solid rgba(255,60,120,0.3);
    color: var(--accent);
}

.pill-watch {
    background: rgba(0,229,255,0.10);
    border: 1px solid var(--border-neon);
    color: var(--neon);
}

.pill-coming {
    background: rgba(255,200,87,0.10);
    border: 1px solid rgba(255,200,87,0.3);
    color: var(--gold);
}

/* ===== FAQ ===== */
.faq-wrap {
    max-width: 760px;
    margin: 0 auto;
}

.faq-item {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    margin-bottom: 16px;
    overflow: hidden;
    transition: var(--transition);
}

.faq-item:hover {
    border-color: var(--border-neon);
}

.faq-q {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 20px 24px;
    font-size: 1rem;
    font-weight: 700;
    cursor: pointer;
    gap: 16px;
}

.faq-q i {
    color: var(--neon);
    transition: var(--transition);
    flex-shrink: 0;
}

.faq-item.open .faq-q i {
    transform: rotate(45deg);
}

.faq-a {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.35s ease, padding 0.35s ease;
    color: var(--text-muted);
    font-size: 0.92rem;
    padding: 0 24px;
    line-height: 1.8;
}

.faq-item.open .faq-a {
    max-height: 300px;
    padding-bottom: 22px;
}

/* ===== CTA ===== */
.cta-section {
    padding: calc(var(--spacer) * 0.8) 0;
    position: relative;
    overflow: hidden;
}

.cta-card {
    background: linear-gradient(135deg, rgba(0,229,255,0.12), rgba(124,92,255,0.12));
    border: 1px solid var(--border-neon);
    border-radius: calc(var(--radius-lg) + 10px);
    padding: clamp(32px, 6vw, 64px);
    text-align: center;
    position: relative;
    overflow: hidden;
}

.cta-card::before {
    content: "\f0e7";
    font-family: "Font Awesome 6 Free";
    font-weight: 900;
    position: absolute;
    top: -30px;
    right: -20px;
    font-size: 8rem;
    color: rgba(0,229,255,0.05);
    transform: rotate(15deg);
}

.cta-card h2 {
    font-size: clamp(1.6rem, 3.5vw, 2.4rem);
    font-weight: 800;
    margin-bottom: 14px;
}

.cta-card p {
    color: var(--text-muted);
    max-width: 560px;
    margin: 0 auto 28px;
    font-size: 1rem;
}

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

.btn-cta {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    padding: 16px 38px;
    border-radius: 40px;
    background: linear-gradient(135deg, var(--neon), var(--neon-2));
    color: #fff;
    font-weight: 700;
    font-size: 1rem;
    box-shadow: 0 8px 30px rgba(0,229,255,0.3);
    transition: var(--transition);
    border: none;
}

.btn-cta:hover {
    color: #fff;
    transform: translateY(-3px);
    box-shadow: 0 14px 42px rgba(0,229,255,0.45);
}

.btn-sub {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    padding: 16px 38px;
    border-radius: 40px;
    background: transparent;
    color: var(--text);
    border: 1px solid var(--border);
    font-weight: 700;
    font-size: 1rem;
    transition: var(--transition);
}

.btn-sub:hover {
    border-color: var(--neon);
    color: var(--neon);
}

/* ===== Footer ===== */
.site-footer {
    background: var(--bg-deep);
    border-top: 1px solid var(--border);
    padding: 64px 0 0;
}

.footer-top {
    display: grid;
    grid-template-columns: 1.4fr 0.8fr 0.8fr;
    gap: 48px;
    padding-bottom: 48px;
}

.footer-brand p {
    color: var(--text-muted);
    font-size: 0.92rem;
    margin-top: 16px;
    max-width: 360px;
}

.footer-links h4 {
    font-size: 1rem;
    font-weight: 700;
    margin-bottom: 18px;
    color: #fff;
    position: relative;
    padding-bottom: 10px;
}

.footer-links h4::after {
    content: "";
    position: absolute;
    left: 0;
    bottom: 0;
    width: 32px;
    height: 2px;
    background: linear-gradient(90deg, var(--neon), var(--neon-2));
    border-radius: 2px;
}

.footer-links a {
    display: block;
    color: var(--text-muted);
    padding: 6px 0;
    font-size: 0.9rem;
    transition: var(--transition);
}

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

.footer-bottom {
    border-top: 1px solid var(--border);
    padding: 22px 0;
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 8px;
}

.footer-bottom p {
    color: var(--text-muted);
    font-size: 0.85rem;
    margin: 0;
}

/* ===== Responsive ===== */
@media (max-width: 1024px) {
    .topic-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .intro-grid {
        grid-template-columns: repeat(3, 1fr);
    }

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

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

    .process-card::after {
        display: none;
    }

    .latest-wrap {
        grid-template-columns: 1fr;
    }

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

@media (max-width: 768px) {
    .header-row {
        height: auto;
        min-height: 64px;
        padding: 10px 0;
        flex-wrap: wrap;
    }

    .nav-toggle {
        display: flex;
        order: 3;
    }

    .nav-collapse {
        display: none;
        width: 100%;
        order: 4;
        padding: 12px 0 4px;
    }

    .nav-collapse.show {
        display: block;
    }

    .main-nav {
        flex-direction: column;
        align-items: stretch;
        gap: 4px;
    }

    .nav-link {
        justify-content: flex-start;
        padding: 12px 16px;
        border-radius: 12px;
    }

    .nav-link::after {
        display: none;
    }

    .btn-nav {
        display: none;
    }

    .page-hero {
        min-height: 480px;
        padding-top: 120px;
        padding-bottom: 60px;
    }

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

    .btn-neon, .btn-ghost {
        width: 100%;
    }

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

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

    .topic-card, .topic-card img {
        min-height: 240px;
    }

    .stats-grid {
        grid-template-columns: 1fr 1fr;
        gap: 14px;
    }

    .stat-item {
        padding: 24px 14px;
    }

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

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

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

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

    .btn-cta, .btn-sub {
        width: 100%;
    }

    .table-wrap {
        margin: 0 -16px;
        border-radius: 0;
    }
}

@media (max-width: 520px) {
    .brand-text {
        font-size: 1.05rem;
    }

    .brand-mark {
        width: 38px;
        height: 38px;
        font-size: 16px;
    }

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

    .latest-item {
        flex-direction: column;
    }

    .latest-date {
        min-width: 64px;
        height: 64px;
        flex-direction: row;
        gap: 6px;
    }

    .latest-date .day {
        font-size: 1.3rem;
    }

    .section-head h2 {
        font-size: 1.5rem;
    }

    .page-hero h1 {
        font-size: 1.9rem;
    }
}

::selection {
    background: rgba(0,229,255,0.3);
    color: #fff;
}

::-webkit-scrollbar {
    width: 8px;
}

::-webkit-scrollbar-track {
    background: var(--bg-deep);
}

::-webkit-scrollbar-thumb {
    background: rgba(0,229,255,0.3);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: rgba(0,229,255,0.5);
}

/* roulang page: category2 */
:root {
            --primary: #00e5a0;
            --primary-dark: #00b87a;
            --primary-light: rgba(0, 229, 160, 0.18);
            --secondary: #7c3aed;
            --secondary-light: rgba(124, 58, 237, 0.22);
            --accent: #f59e0b;
            --accent-light: rgba(245, 158, 11, 0.18);
            --bg-dark: #080c16;
            --bg-body: #0d1220;
            --bg-section: #111827;
            --bg-card: #151e2e;
            --bg-card-hover: #1a2538;
            --bg-hero-overlay: linear-gradient(135deg, rgba(8, 12, 22, 0.88) 0%, rgba(13, 18, 32, 0.72) 50%, rgba(0, 229, 160, 0.15) 100%);
            --text-main: #eaf0f8;
            --text-muted: #93a2b8;
            --border-color: rgba(255, 255, 255, 0.07);
            --border-glow: rgba(0, 229, 160, 0.4);
            --radius-sm: 10px;
            --radius-md: 18px;
            --radius-lg: 26px;
            --shadow-sm: 0 4px 14px rgba(0, 0, 0, 0.22);
            --shadow-md: 0 14px 36px rgba(0, 0, 0, 0.28);
            --shadow-glow: 0 0 30px rgba(0, 229, 160, 0.10);
            --transition-base: all 0.3s ease;
            --font-body: -apple-system, BlinkMacSystemFont, "SF Pro Text", "Segoe UI", Roboto, "PingFang SC", "Microsoft YaHei", "Helvetica Neue", sans-serif;
        }
        *,
        *::before,
        *::after {
            box-sizing: border-box;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            margin: 0;
            font-family: var(--font-body);
            background-color: var(--bg-body);
            color: var(--text-main);
            line-height: 1.7;
            -webkit-font-smoothing: antialiased;
            overflow-x: hidden;
        }
        a {
            color: inherit;
            text-decoration: none;
            transition: var(--transition-base);
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        .container {
            max-width: 1220px;
            padding-left: 22px;
            padding-right: 22px;
        }
        .section {
            padding: 92px 0;
            position: relative;
        }
        .section-label {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            font-size: 0.82rem;
            font-weight: 700;
            letter-spacing: 0.08em;
            text-transform: uppercase;
            color: var(--primary);
            background: var(--primary-light);
            border: 1px solid rgba(0, 229, 160, 0.2);
            padding: 6px 18px;
            border-radius: 100px;
            margin-bottom: 18px;
        }
        .section-title {
            font-size: 2.1rem;
            font-weight: 800;
            line-height: 1.3;
            margin-bottom: 14px;
            letter-spacing: -0.01em;
        }
        .section-subtitle {
            color: var(--text-muted);
            font-size: 1.05rem;
            max-width: 680px;
            margin: 0 auto 46px;
            line-height: 1.7;
        }
        .text-gradient {
            background: linear-gradient(120deg, var(--primary), #39c6ff, var(--secondary));
            -webkit-background-clip: text;
            background-clip: text;
            -webkit-text-fill-color: transparent;
        }
        /* ===== Header ===== */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 1040;
            background: rgba(8, 12, 22, 0.88);
            backdrop-filter: blur(18px);
            -webkit-backdrop-filter: blur(18px);
            border-bottom: 1px solid var(--border-color);
            box-shadow: 0 8px 30px rgba(0, 0, 0, 0.28);
        }
        .site-header::after {
            content: "";
            position: absolute;
            left: 0;
            right: 0;
            bottom: -1px;
            height: 1px;
            background: linear-gradient(90deg, transparent, rgba(0, 229, 160, 0.5), transparent);
        }
        .header-row {
            display: flex;
            align-items: center;
            justify-content: space-between;
            min-height: 74px;
            gap: 20px;
        }
        .brand-wrap {
            display: inline-flex;
            align-items: center;
            gap: 12px;
            flex-shrink: 0;
        }
        .brand-mark {
            width: 40px;
            height: 40px;
            display: flex;
            align-items: center;
            justify-content: center;
            background: linear-gradient(135deg, var(--primary), var(--secondary));
            border-radius: 12px;
            font-size: 1.05rem;
            color: #fff;
            box-shadow: 0 0 20px rgba(0, 229, 160, 0.3);
        }
        .brand-text {
            font-size: 1.22rem;
            font-weight: 800;
            letter-spacing: -0.02em;
            color: var(--text-main);
            background: linear-gradient(120deg, #fff 0%, var(--primary) 100%);
            -webkit-background-clip: text;
            background-clip: text;
            -webkit-text-fill-color: transparent;
        }
        .nav-collapse {
            flex: 1;
            display: flex;
            justify-content: center;
        }
        .main-nav {
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .main-nav .nav-link {
            position: relative;
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 10px 20px;
            border-radius: 100px;
            font-size: 0.95rem;
            font-weight: 600;
            color: var(--text-muted);
            background: transparent;
            border: 1px solid transparent;
            transition: var(--transition-base);
        }
        .main-nav .nav-link:hover {
            color: var(--text-main);
            background: rgba(255, 255, 255, 0.05);
            border-color: rgba(0, 229, 160, 0.15);
        }
        .main-nav .nav-link.active {
            color: var(--primary);
            background: rgba(0, 229, 160, 0.08);
            border-color: rgba(0, 229, 160, 0.2);
            box-shadow: 0 0 18px rgba(0, 229, 160, 0.1);
        }
        .main-nav .nav-link.active::after {
            content: "";
            position: absolute;
            bottom: 0;
            left: 18px;
            right: 18px;
            height: 2px;
            border-radius: 4px;
            background: var(--primary);
            box-shadow: 0 0 14px rgba(0, 229, 160, 0.9);
        }
        .header-actions {
            display: flex;
            align-items: center;
            gap: 10px;
            flex-shrink: 0;
        }
        .btn-nav {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 10px 22px;
            border-radius: 100px;
            font-size: 0.9rem;
            font-weight: 700;
            color: #fff;
            background: linear-gradient(135deg, var(--primary), var(--primary-dark));
            border: none;
            transition: var(--transition-base);
            box-shadow: 0 4px 16px rgba(0, 229, 160, 0.25);
        }
        .btn-nav:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(0, 229, 160, 0.35);
        }
        .nav-toggle {
            display: none;
            width: 42px;
            height: 42px;
            padding: 0;
            border-radius: 10px;
            border: 1px solid var(--border-color);
            background: rgba(255, 255, 255, 0.04);
            color: var(--text-main);
            font-size: 1.1rem;
            transition: var(--transition-base);
        }
        .nav-toggle:hover {
            border-color: var(--primary);
            color: var(--primary);
        }
        /* ===== Buttons ===== */
        .btn-custom {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            padding: 13px 32px;
            border-radius: 100px;
            font-size: 0.95rem;
            font-weight: 700;
            border: none;
            transition: var(--transition-base);
            cursor: pointer;
        }
        .btn-custom-primary {
            color: #fff;
            background: linear-gradient(135deg, var(--primary), var(--primary-dark));
            box-shadow: 0 6px 20px rgba(0, 229, 160, 0.3);
        }
        .btn-custom-primary:hover {
            transform: translateY(-3px);
            box-shadow: 0 12px 32px rgba(0, 229, 160, 0.4);
            color: #fff;
        }
        .btn-custom-ghost {
            color: var(--text-main);
            background: rgba(255, 255, 255, 0.04);
            border: 1px solid var(--border-color);
        }
        .btn-custom-ghost:hover {
            border-color: var(--primary);
            color: var(--primary);
            transform: translateY(-2px);
        }
        .btn-custom-light {
            color: var(--bg-dark);
            background: #fff;
            box-shadow: 0 6px 20px rgba(255, 255, 255, 0.18);
        }
        .btn-custom-light:hover {
            transform: translateY(-3px);
            color: var(--bg-dark);
            box-shadow: 0 12px 30px rgba(255, 255, 255, 0.25);
        }
        /* ===== Hero Banner ===== */
        .page-hero {
            position: relative;
            padding: 120px 0 110px;
            background-image: url('/assets/images/backpic/back-1.png');
            background-size: cover;
            background-position: center;
            background-repeat: no-repeat;
        }
        .page-hero::before {
            content: "";
            position: absolute;
            inset: 0;
            background: var(--bg-hero-overlay);
        }
        .page-hero::after {
            content: "";
            position: absolute;
            inset: auto 0 0 0;
            height: 3px;
            background: linear-gradient(90deg, transparent, var(--primary), var(--secondary), transparent);
        }
        .page-hero .container {
            position: relative;
            z-index: 2;
        }
        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 7px 18px;
            border-radius: 100px;
            background: rgba(0, 229, 160, 0.12);
            border: 1px solid rgba(0, 229, 160, 0.25);
            color: var(--primary);
            font-size: 0.82rem;
            font-weight: 700;
            letter-spacing: 0.04em;
            margin-bottom: 22px;
        }
        .page-hero h1 {
            font-size: clamp(2.4rem, 5.5vw, 4.1rem);
            font-weight: 900;
            line-height: 1.15;
            margin-bottom: 22px;
            letter-spacing: -0.02em;
        }
        .page-hero .lead {
            font-size: 1.15rem;
            color: #c8d2e0;
            max-width: 680px;
            margin-bottom: 34px;
            line-height: 1.8;
        }
        .hero-stats {
            display: flex;
            flex-wrap: wrap;
            gap: 26px;
            margin-top: 36px;
        }
        .hero-stat {
            padding-left: 20px;
            border-left: 2px solid rgba(0, 229, 160, 0.4);
        }
        .hero-stat strong {
            display: block;
            font-size: 1.5rem;
            font-weight: 800;
            color: var(--text-main);
        }
        .hero-stat span {
            font-size: 0.85rem;
            color: var(--text-muted);
        }
        /* ===== Cards ===== */
        .card-custom {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            overflow: hidden;
            transition: var(--transition-base);
            height: 100%;
        }
        .card-custom:hover {
            transform: translateY(-6px);
            border-color: rgba(0, 229, 160, 0.25);
            box-shadow: var(--shadow-md), var(--shadow-glow);
            background: var(--bg-card-hover);
        }
        .card-custom .card-img-wrap {
            overflow: hidden;
            position: relative;
            aspect-ratio: 16 / 9;
            background: var(--bg-dark);
        }
        .card-custom .card-img-wrap img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.5s ease;
        }
        .card-custom:hover .card-img-wrap img {
            transform: scale(1.06);
        }
        .card-custom .card-img-wrap::after {
            content: "";
            position: absolute;
            bottom: 0;
            left: 0;
            right: 0;
            height: 60px;
            background: linear-gradient(to top, var(--bg-card), transparent);
            pointer-events: none;
        }
        .card-body-custom {
            padding: 26px;
        }
        .card-tag {
            display: inline-block;
            padding: 4px 14px;
            border-radius: 100px;
            font-size: 0.75rem;
            font-weight: 700;
            color: var(--primary);
            background: var(--primary-light);
            border: 1px solid rgba(0, 229, 160, 0.15);
            margin-bottom: 14px;
        }
        .card-title-custom {
            font-size: 1.15rem;
            font-weight: 700;
            color: var(--text-main);
            margin-bottom: 10px;
            line-height: 1.45;
        }
        .card-text-custom {
            font-size: 0.92rem;
            color: var(--text-muted);
            line-height: 1.7;
            margin-bottom: 16px;
        }
        .card-link {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            font-size: 0.88rem;
            font-weight: 700;
            color: var(--primary);
        }
        .card-link:hover {
            gap: 14px;
            color: #fff;
        }
        /* ===== Feature icon cards ===== */
        .feature-card {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            padding: 34px 28px;
            height: 100%;
            transition: var(--transition-base);
            position: relative;
            overflow: hidden;
        }
        .feature-card::before {
            content: "";
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 2px;
            background: linear-gradient(90deg, transparent, var(--primary), transparent);
            opacity: 0;
            transition: var(--transition-base);
        }
        .feature-card:hover {
            border-color: rgba(0, 229, 160, 0.3);
            transform: translateY(-6px);
            box-shadow: var(--shadow-md), var(--shadow-glow);
        }
        .feature-card:hover::before {
            opacity: 1;
        }
        .feature-icon {
            width: 56px;
            height: 56px;
            display: flex;
            align-items: center;
            justify-content: center;
            border-radius: 16px;
            font-size: 1.4rem;
            margin-bottom: 22px;
            background: linear-gradient(135deg, var(--primary-light), var(--secondary-light));
            color: var(--primary);
            border: 1px solid rgba(0, 229, 160, 0.15);
        }
        .feature-card h4 {
            font-size: 1.05rem;
            font-weight: 700;
            margin-bottom: 10px;
            color: var(--text-main);
        }
        .feature-card p {
            font-size: 0.9rem;
            color: var(--text-muted);
            margin-bottom: 0;
            line-height: 1.7;
        }
        /* ===== Check list ===== */
        .check-list {
            list-style: none;
            margin: 0;
            padding: 0;
        }
        .check-list li {
            display: flex;
            align-items: flex-start;
            gap: 14px;
            padding: 14px 18px;
            border-radius: var(--radius-sm);
            background: rgba(255, 255, 255, 0.025);
            border: 1px solid var(--border-color);
            margin-bottom: 12px;
            transition: var(--transition-base);
        }
        .check-list li:hover {
            border-color: rgba(0, 229, 160, 0.2);
            background: rgba(0, 229, 160, 0.04);
        }
        .check-list li i {
            color: var(--primary);
            font-size: 1.1rem;
            margin-top: 3px;
            flex-shrink: 0;
        }
        .check-list li span {
            font-size: 0.95rem;
            color: var(--text-main);
            line-height: 1.6;
        }
        /* ===== Process / Timeline ===== */
        .process-section {
            background: var(--bg-section);
        }
        .process-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
            position: relative;
        }
        .process-grid::before {
            content: "";
            position: absolute;
            top: 34px;
            left: 8%;
            right: 8%;
            height: 2px;
            background: linear-gradient(90deg, var(--primary), var(--secondary), var(--primary));
            opacity: 0.35;
            border-radius: 2px;
        }
        .process-item {
            text-align: center;
            padding: 24px 14px 0;
            position: relative;
        }
        .process-num {
            width: 68px;
            height: 68px;
            margin: 0 auto 20px;
            display: flex;
            align-items: center;
            justify-content: center;
            border-radius: 50%;
            font-size: 1.4rem;
            font-weight: 800;
            color: var(--primary);
            background: var(--bg-card);
            border: 2px solid rgba(0, 229, 160, 0.3);
            box-shadow: 0 0 24px rgba(0, 229, 160, 0.12);
            position: relative;
            z-index: 1;
        }
        .process-item h5 {
            font-size: 1rem;
            font-weight: 700;
            margin-bottom: 8px;
            color: var(--text-main);
        }
        .process-item p {
            font-size: 0.86rem;
            color: var(--text-muted);
            line-height: 1.6;
            margin-bottom: 0;
        }
        /* ===== Article cards ===== */
        .article-card {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            overflow: hidden;
            transition: var(--transition-base);
            height: 100%;
        }
        .article-card:hover {
            transform: translateY(-6px);
            border-color: rgba(0, 229, 160, 0.25);
            box-shadow: var(--shadow-md), var(--shadow-glow);
        }
        .article-card .article-img {
            aspect-ratio: 16 / 10;
            overflow: hidden;
            position: relative;
        }
        .article-card .article-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.5s ease;
        }
        .article-card:hover .article-img img {
            transform: scale(1.05);
        }
        .article-card .article-body {
            padding: 24px;
        }
        .article-meta {
            display: flex;
            align-items: center;
            gap: 14px;
            font-size: 0.78rem;
            color: var(--text-muted);
            margin-bottom: 12px;
        }
        .article-meta .badge-custom {
            background: var(--secondary-light);
            color: #c9b5ff;
            padding: 3px 12px;
            border-radius: 100px;
            font-weight: 700;
            font-size: 0.72rem;
        }
        .article-card h4 {
            font-size: 1.05rem;
            font-weight: 700;
            line-height: 1.5;
            margin-bottom: 10px;
            color: var(--text-main);
        }
        .article-card p {
            font-size: 0.88rem;
            color: var(--text-muted);
            line-height: 1.65;
            margin-bottom: 0;
        }
        /* ===== Device section ===== */
        .device-card {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            padding: 28px;
            height: 100%;
            display: flex;
            flex-direction: column;
            gap: 16px;
            transition: var(--transition-base);
        }
        .device-card:hover {
            border-color: rgba(0, 229, 160, 0.25);
            box-shadow: var(--shadow-md);
        }
        .device-card .device-icon {
            width: 52px;
            height: 52px;
            display: flex;
            align-items: center;
            justify-content: center;
            border-radius: 14px;
            font-size: 1.3rem;
            background: var(--primary-light);
            color: var(--primary);
        }
        .device-card h5 {
            font-size: 1rem;
            font-weight: 700;
            margin-bottom: 6px;
            color: var(--text-main);
        }
        .device-card p {
            font-size: 0.88rem;
            color: var(--text-muted);
            margin-bottom: 0;
            line-height: 1.65;
        }
        .net-tip {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-left: 3px solid var(--primary);
            border-radius: var(--radius-sm);
            padding: 22px 24px;
            margin-bottom: 14px;
            display: flex;
            gap: 16px;
            align-items: flex-start;
        }
        .net-tip i {
            color: var(--primary);
            font-size: 1.3rem;
            margin-top: 2px;
        }
        .net-tip p {
            margin-bottom: 0;
            color: var(--text-muted);
            font-size: 0.92rem;
            line-height: 1.65;
        }
        /* ===== FAQ ===== */
        .faq-section {
            background: var(--bg-section);
        }
        .accordion-custom {
            max-width: 880px;
            margin: 0 auto;
        }
        .accordion-item-custom {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md) !important;
            margin-bottom: 16px;
            overflow: hidden;
            transition: var(--transition-base);
        }
        .accordion-item-custom:hover {
            border-color: rgba(0, 229, 160, 0.2);
        }
        .accordion-item-custom .accordion-header {
            background: transparent;
        }
        .accordion-item-custom .accordion-button {
            background: transparent;
            color: var(--text-main);
            font-size: 1rem;
            font-weight: 700;
            padding: 22px 26px;
            box-shadow: none;
            border-radius: 0;
        }
        .accordion-item-custom .accordion-button:not(.collapsed) {
            color: var(--primary);
            background: rgba(0, 229, 160, 0.04);
            box-shadow: none;
        }
        .accordion-item-custom .accordion-button:focus {
            box-shadow: none;
            border-color: rgba(0, 229, 160, 0.3);
        }
        .accordion-item-custom .accordion-button::after {
            filter: invert(1) hue-rotate(140deg);
            opacity: 0.6;
        }
        .accordion-item-custom .accordion-body {
            padding: 4px 26px 24px;
            color: var(--text-muted);
            font-size: 0.93rem;
            line-height: 1.7;
            background: transparent;
        }
        /* ===== CTA ===== */
        .cta-section {
            padding: 80px 0;
            background: linear-gradient(135deg, rgba(0, 229, 160, 0.08), rgba(124, 58, 237, 0.08)), var(--bg-body);
        }
        .cta-box {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-lg);
            padding: 60px 40px;
            text-align: center;
            position: relative;
            overflow: hidden;
        }
        .cta-box::before {
            content: "";
            position: absolute;
            top: -50%;
            left: -50%;
            right: -50%;
            bottom: -50%;
            background: radial-gradient(circle at 30% 40%, rgba(0, 229, 160, 0.15), transparent 55%),
                radial-gradient(circle at 70% 60%, rgba(124, 58, 237, 0.18), transparent 50%);
            pointer-events: none;
        }
        .cta-box .cta-content {
            position: relative;
            z-index: 2;
        }
        .cta-box h3 {
            font-size: 2rem;
            font-weight: 800;
            margin-bottom: 14px;
        }
        .cta-box p {
            color: var(--text-muted);
            font-size: 1rem;
            max-width: 560px;
            margin: 0 auto 30px;
            line-height: 1.7;
        }
        /* ===== Footer ===== */
        .site-footer {
            background: var(--bg-dark);
            border-top: 1px solid var(--border-color);
            padding: 60px 0 0;
            margin-top: 0;
        }
        .footer-top {
            display: grid;
            grid-template-columns: 1.5fr 1fr 1fr;
            gap: 40px;
            padding-bottom: 40px;
        }
        .footer-brand .brand-text {
            font-size: 1.3rem;
            font-weight: 800;
            display: inline-block;
            margin-bottom: 12px;
        }
        .footer-brand p {
            color: var(--text-muted);
            font-size: 0.9rem;
            line-height: 1.7;
            max-width: 320px;
            margin-bottom: 0;
        }
        .footer-links h4 {
            font-size: 0.95rem;
            font-weight: 700;
            color: var(--text-main);
            margin-bottom: 16px;
        }
        .footer-links a {
            display: block;
            color: var(--text-muted);
            font-size: 0.9rem;
            padding: 4px 0;
            transition: var(--transition-base);
        }
        .footer-links a:hover {
            color: var(--primary);
            padding-left: 4px;
        }
        .footer-bottom {
            border-top: 1px solid var(--border-color);
            padding: 24px 0;
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            gap: 10px;
        }
        .footer-bottom p {
            margin-bottom: 0;
            font-size: 0.85rem;
            color: var(--text-muted);
        }
        /* ===== Focus style ===== */
        .main-nav .nav-link:focus-visible,
        .btn-custom:focus-visible,
        .nav-toggle:focus-visible,
        .footer-links a:focus-visible {
            outline: 2px solid var(--primary);
            outline-offset: 3px;
            border-radius: 6px;
        }
        /* ===== Responsive ===== */
        @media (max-width: 992px) {
            .section {
                padding: 72px 0;
            }
            .process-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .process-grid::before {
                display: none;
            }
            .footer-top {
                grid-template-columns: 1fr 1fr;
            }
        }
        @media (max-width: 768px) {
            .section {
                padding: 56px 0;
            }
            .section-title {
                font-size: 1.7rem;
            }
            .header-row {
                flex-wrap: wrap;
                min-height: 64px;
                padding-top: 10px;
                padding-bottom: 10px;
            }
            .nav-collapse {
                display: none;
                width: 100%;
                order: 3;
                padding: 12px 0 6px;
                border-top: 1px solid var(--border-color);
                margin-top: 6px;
            }
            .nav-collapse.open {
                display: flex;
            }
            .main-nav {
                flex-direction: column;
                align-items: flex-start;
                gap: 4px;
                width: 100%;
            }
            .main-nav .nav-link {
                width: 100%;
                border-radius: 10px;
            }
            .nav-toggle {
                display: inline-flex;
                align-items: center;
                justify-content: center;
            }
            .header-actions {
                margin-left: auto;
            }
            .btn-nav {
                display: none;
            }
            .page-hero {
                padding: 76px 0 70px;
            }
            .page-hero h1 {
                font-size: 2.2rem;
            }
            .hero-stats {
                gap: 16px;
            }
            .process-grid {
                grid-template-columns: 1fr;
                gap: 18px;
            }
            .process-item {
                padding: 16px 0;
                display: flex;
                align-items: center;
                text-align: left;
                gap: 18px;
            }
            .process-num {
                margin: 0;
                flex-shrink: 0;
                width: 56px;
                height: 56px;
                font-size: 1.15rem;
            }
            .process-item h5 {
                margin-bottom: 4px;
            }
            .cta-box {
                padding: 40px 24px;
            }
            .cta-box h3 {
                font-size: 1.6rem;
            }
            .footer-top {
                grid-template-columns: 1fr;
                gap: 30px;
            }
            .footer-bottom {
                flex-direction: column;
                gap: 6px;
                text-align: center;
            }
        }
        @media (max-width: 520px) {
            .brand-text {
                font-size: 1.05rem;
            }
            .brand-mark {
                width: 34px;
                height: 34px;
                font-size: 0.9rem;
            }
            .page-hero {
                padding: 58px 0 56px;
            }
            .page-hero h1 {
                font-size: 1.8rem;
            }
            .page-hero .lead {
                font-size: 0.98rem;
            }
            .hero-stat strong {
                font-size: 1.15rem;
            }
            .feature-card {
                padding: 24px 20px;
            }
            .card-body-custom {
                padding: 20px;
            }
            .article-card .article-body {
                padding: 18px;
            }
            .accordion-item-custom .accordion-button {
                font-size: 0.92rem;
                padding: 18px 20px;
            }
            .accordion-item-custom .accordion-body {
                padding: 0 20px 20px;
                font-size: 0.88rem;
            }
        }

/* roulang page: article */
:root {
    --bg-primary: #0b0f1a;
    --bg-secondary: #0e1422;
    --bg-card: #121a2a;
    --bg-card-hover: #1a2338;
    --accent: #00e5ff;
    --accent-rgb: 0, 229, 255;
    --accent-secondary: #8b5cf6;
    --accent-secondary-rgb: 139, 92, 246;
    --text-primary: #f0f4fa;
    --text-secondary: #a8b3c7;
    --text-muted: #6b7a94;
    --border-color: #1e2a44;
    --border-glow: rgba(0, 229, 255, .3);
    --radius: 16px;
    --radius-sm: 10px;
    --radius-lg: 24px;
    --shadow: 0 8px 32px rgba(0, 0, 0, .35);
    --shadow-glow: 0 0 24px rgba(0, 229, 255, .15);
    --shadow-card: 0 4px 24px rgba(0, 0, 0, .35);
    --transition: all .3s ease;
    --font-family: 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', 'Segoe UI', sans-serif;
}

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

html {
    scroll-behavior: smooth;
}

body {
    margin: 0;
    font-family: var(--font-family);
    font-size: 16px;
    line-height: 1.7;
    color: var(--text-primary);
    background-color: var(--bg-primary);
    background-image: radial-gradient(ellipse at 20% 0%, rgba(var(--accent-rgb), .06), transparent 50%), radial-gradient(ellipse at 80% 100%, rgba(var(--accent-secondary-rgb), .05), transparent 50%);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

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

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

img {
    max-width: 100%;
    height: auto;
}

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

.container {
    max-width: 1240px;
}

/* ===== Header & Nav ===== */
.site-header {
    position: sticky;
    top: 0;
    z-index: 1000;
    background: rgba(10, 14, 23, .9);
    backdrop-filter: blur(18px);
    -webkit-backdrop-filter: blur(18px);
    border-bottom: 1px solid var(--border-color);
    box-shadow: 0 4px 24px rgba(0, 0, 0, .45);
}

.site-header::before {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 2px;
    background: linear-gradient(90deg, transparent, var(--accent), var(--accent-secondary), transparent);
}

.header-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 20px;
    min-height: 76px;
    padding-top: 4px;
}

.brand-wrap {
    display: inline-flex;
    align-items: center;
    gap: 12px;
    flex-shrink: 0;
}

.brand-mark {
    width: 42px;
    height: 42px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 12px;
    font-size: 18px;
    color: #fff;
    background: linear-gradient(135deg, var(--accent), var(--accent-secondary));
    box-shadow: 0 0 20px rgba(var(--accent-rgb), .35);
}

.brand-text {
    font-size: 20px;
    font-weight: 800;
    letter-spacing: .5px;
    background: linear-gradient(135deg, #fff 40%, var(--accent) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    white-space: nowrap;
}

.nav-collapse {
    display: flex;
    align-items: center;
}

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

.nav-link {
    display: inline-flex;
    align-items: center;
    padding: 9px 18px;
    border-radius: 10px;
    color: var(--text-secondary);
    font-weight: 500;
    font-size: 15px;
    position: relative;
    transition: var(--transition);
}

.nav-link i {
    font-size: 14px;
}

.nav-link:hover {
    color: var(--text-primary);
    background: rgba(255, 255, 255, .05);
}

.nav-link.active {
    color: var(--accent);
    background: rgba(var(--accent-rgb), .08);
    box-shadow: inset 0 0 0 1px rgba(var(--accent-rgb), .25), 0 0 18px rgba(var(--accent-rgb), .1);
}

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

.btn-nav {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 9px 20px;
    border-radius: 50px;
    font-size: 14px;
    font-weight: 600;
    color: #0b0f1a;
    background: linear-gradient(135deg, var(--accent), #00b8d4);
    border: none;
    box-shadow: 0 4px 18px rgba(var(--accent-rgb), .25);
    transition: var(--transition);
    white-space: nowrap;
}

.btn-nav:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 28px rgba(var(--accent-rgb), .4);
    color: #0b0f1a;
}

.nav-toggle {
    display: none;
    width: 42px;
    height: 42px;
    align-items: center;
    justify-content: center;
    border-radius: 10px;
    background: rgba(255, 255, 255, .06);
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    font-size: 18px;
    cursor: pointer;
    transition: var(--transition);
    padding: 0;
}

.nav-toggle:hover {
    background: rgba(255, 255, 255, .1);
    color: var(--accent);
}

.nav-toggle:focus-visible,
.nav-link:focus-visible,
.btn-nav:focus-visible,
.btn-primary:focus-visible,
.btn-outline:focus-visible,
.accordion-button:focus-visible {
    outline: 2px solid var(--accent);
    outline-offset: 2px;
}

/* ===== Buttons ===== */
.btn-primary {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 12px 30px;
    border-radius: 50px;
    font-size: 15px;
    font-weight: 600;
    color: #0b0f1a;
    background: linear-gradient(135deg, var(--accent), #00b8d4);
    border: none;
    box-shadow: 0 4px 20px rgba(var(--accent-rgb), .25);
    transition: var(--transition);
    cursor: pointer;
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 32px rgba(var(--accent-rgb), .45);
    color: #0b0f1a;
}

.btn-outline {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 11px 28px;
    border-radius: 50px;
    font-size: 15px;
    font-weight: 600;
    color: var(--accent);
    background: transparent;
    border: 1px solid rgba(var(--accent-rgb), .45);
    transition: var(--transition);
    cursor: pointer;
}

.btn-outline:hover {
    background: rgba(var(--accent-rgb), .1);
    border-color: var(--accent);
    color: var(--accent);
    transform: translateY(-2px);
    box-shadow: 0 6px 24px rgba(var(--accent-rgb), .15);
}

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

/* ===== Article Hero ===== */
.article-hero {
    position: relative;
    padding: 110px 0 90px;
    background: url('/assets/images/backpic/back-1.png') no-repeat center center / cover;
    background-color: #0a0e17;
    isolation: isolate;
    text-align: center;
}

.article-hero::before {
    content: "";
    position: absolute;
    inset: 0;
    background: linear-gradient(180deg, rgba(10, 14, 23, .88) 0%, rgba(10, 14, 23, .72) 50%, rgba(10, 14, 23, .95) 100%);
    z-index: -1;
}

.article-hero::after {
    content: "";
    position: absolute;
    inset: 0;
    background: radial-gradient(ellipse at 50% 0%, rgba(var(--accent-rgb), .12), transparent 60%);
    z-index: -1;
}

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

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 7px 20px;
    border-radius: 50px;
    font-size: 13px;
    font-weight: 600;
    letter-spacing: 1px;
    color: var(--accent);
    background: rgba(var(--accent-rgb), .1);
    border: 1px solid rgba(var(--accent-rgb), .3);
    backdrop-filter: blur(8px);
    margin-bottom: 20px;
}

.article-hero h1 {
    font-size: 2.6rem;
    font-weight: 800;
    line-height: 1.3;
    margin-bottom: 22px;
    color: var(--text-primary);
    text-shadow: 0 0 40px rgba(var(--accent-rgb), .15);
    word-wrap: break-word;
}

.article-meta {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 12px;
    flex-wrap: wrap;
    font-size: 14px;
    color: var(--text-secondary);
}

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

.article-meta .dot {
    color: var(--text-muted);
    font-weight: 700;
}

/* ===== Breadcrumb ===== */
.breadcrumb-nav {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 14px;
    color: var(--text-muted);
    margin-bottom: 24px;
    flex-wrap: wrap;
}

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

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

.breadcrumb-nav i.fa-chevron-right {
    font-size: 10px;
    color: var(--text-muted);
    opacity: .5;
}

.breadcrumb-nav span {
    color: var(--text-secondary);
}

/* ===== Article Main ===== */
.article-main {
    padding: 60px 0 24px;
}

.article-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius);
    padding: 40px;
    box-shadow: var(--shadow);
    margin-bottom: 32px;
}

.article-body {
    font-size: 16px;
    line-height: 1.85;
    color: var(--text-secondary);
}

.article-body h2 {
    font-size: 1.55rem;
    font-weight: 700;
    margin-top: 2.2rem;
    margin-bottom: 1rem;
    color: var(--text-primary);
    padding-left: 14px;
    border-left: 3px solid var(--accent);
    line-height: 1.4;
}

.article-body h3 {
    font-size: 1.25rem;
    font-weight: 700;
    margin-top: 1.8rem;
    margin-bottom: .8rem;
    color: var(--text-primary);
}

.article-body h4 {
    font-size: 1.08rem;
    font-weight: 600;
    margin-top: 1.5rem;
    margin-bottom: .6rem;
    color: var(--text-primary);
}

.article-body p {
    color: var(--text-secondary);
    line-height: 1.85;
    margin-bottom: 1.2rem;
}

.article-body img {
    max-width: 100%;
    border-radius: 12px;
    margin: 1.5rem 0;
    box-shadow: var(--shadow-card);
}

.article-body a {
    color: var(--accent);
    text-decoration: underline;
    text-underline-offset: 3px;
}

.article-body ul,
.article-body ol {
    padding-left: 1.5rem;
    margin-bottom: 1.2rem;
}

.article-body ul li,
.article-body ol li {
    margin-bottom: .5rem;
}

.article-body blockquote {
    border-left: 3px solid var(--accent);
    background: rgba(var(--accent-rgb), .05);
    padding: 1rem 1.5rem;
    border-radius: 0 12px 12px 0;
    margin: 1.5rem 0;
    color: var(--text-secondary);
    font-style: italic;
}

.article-body code {
    background: rgba(255, 255, 255, .08);
    padding: 2px 8px;
    border-radius: 6px;
    font-size: .9em;
    color: var(--accent);
}

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

.article-body table th,
.article-body table td {
    border: 1px solid var(--border-color);
    padding: 10px 14px;
    text-align: left;
}

.article-body table th {
    background: rgba(255, 255, 255, .04);
    color: var(--text-primary);
    font-weight: 600;
}

/* ===== Article Footer Info ===== */
.article-footer-info {
    margin-top: 32px;
    padding-top: 24px;
    border-top: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: 16px;
}

.article-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.tag {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 6px 14px;
    border-radius: 50px;
    font-size: 13px;
    color: var(--text-secondary);
    background: rgba(255, 255, 255, .04);
    border: 1px solid var(--border-color);
    transition: var(--transition);
}

.tag:hover {
    color: var(--accent);
    border-color: rgba(var(--accent-rgb), .4);
    background: rgba(var(--accent-rgb), .06);
}

/* ===== Not Found ===== */
.not-found {
    text-align: center;
    padding: 60px 20px;
}

.not-found-icon {
    width: 90px;
    height: 90px;
    margin: 0 auto 24px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    font-size: 36px;
    color: var(--accent);
    background: rgba(var(--accent-rgb), .08);
    border: 1px solid rgba(var(--accent-rgb), .25);
    box-shadow: 0 0 40px rgba(var(--accent-rgb), .1);
}

.not-found h2 {
    font-size: 1.6rem;
    font-weight: 700;
    margin-bottom: 12px;
    color: var(--text-primary);
}

.not-found p {
    color: var(--text-secondary);
    margin-bottom: 28px;
}

/* ===== Sidebar ===== */
.sidebar {
    position: sticky;
    top: 96px;
}

.side-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius);
    padding: 24px;
    margin-bottom: 24px;
    box-shadow: var(--shadow-card);
}

.side-card h3 {
    font-size: 1.05rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 18px;
    display: flex;
    align-items: center;
    gap: 8px;
}

.side-card h3 i {
    color: var(--accent);
    font-size: 16px;
}

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

.side-list li {
    border-bottom: 1px solid rgba(255, 255, 255, .04);
}

.side-list li:last-child {
    border-bottom: none;
}

.side-list a {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 12px 0;
    color: var(--text-secondary);
    font-size: 14px;
    transition: var(--transition);
}

.side-list a:hover {
    color: var(--accent);
    padding-left: 6px;
}

.side-list a::before {
    content: "";
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: var(--accent);
    flex-shrink: 0;
    opacity: .6;
}

.side-image {
    border-radius: 12px;
    overflow: hidden;
    margin-bottom: 16px;
}

.side-image img {
    width: 100%;
    height: 130px;
    object-fit: cover;
    display: block;
    transition: transform .5s;
}

.side-image:hover img {
    transform: scale(1.04);
}

.side-card .btn-outline {
    width: 100%;
    justify-content: center;
    margin-top: 8px;
}

.side-card p {
    font-size: 14px;
    color: var(--text-muted);
    margin-bottom: 16px;
    line-height: 1.6;
}

.side-hot-num {
    font-size: 12px;
    font-weight: 700;
    color: var(--accent);
    background: rgba(var(--accent-rgb), .1);
    border-radius: 6px;
    padding: 2px 8px;
    flex-shrink: 0;
}

/* ===== Related Section ===== */
.related-section {
    padding: 70px 0 30px;
}

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

.section-badge {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 5px 16px;
    border-radius: 50px;
    font-size: 13px;
    font-weight: 600;
    color: var(--accent);
    background: rgba(var(--accent-rgb), .08);
    border: 1px solid rgba(var(--accent-rgb), .25);
    margin-bottom: 16px;
}

.section-head h2 {
    font-size: 2rem;
    font-weight: 800;
    color: var(--text-primary);
    margin-bottom: 12px;
}

.section-head p {
    color: var(--text-muted);
    max-width: 600px;
    margin: 0 auto;
}

.related-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius);
    overflow: hidden;
    transition: var(--transition);
    height: 100%;
    display: flex;
    flex-direction: column;
}

.related-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-glow);
    border-color: rgba(var(--accent-rgb), .4);
    background: var(--bg-card-hover);
}

.related-card .card-img-wrap {
    position: relative;
    overflow: hidden;
    height: 210px;
}

.related-card .card-img-wrap img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform .6s ease;
}

.related-card:hover .card-img-wrap img {
    transform: scale(1.06);
}

.related-card .card-img-wrap::after {
    content: "";
    position: absolute;
    inset: 0;
    background: linear-gradient(180deg, transparent 60%, rgba(10, 14, 23, .55));
}

.card-badge {
    position: absolute;
    top: 16px;
    left: 16px;
    z-index: 2;
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 5px 14px;
    border-radius: 50px;
    font-size: 12px;
    font-weight: 600;
    color: var(--text-primary);
    background: rgba(10, 14, 23, .7);
    backdrop-filter: blur(8px);
    border: 1px solid rgba(255, 255, 255, .15);
}

.card-badge i {
    color: var(--accent);
    font-size: 11px;
}

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

.related-card .card-body h3 {
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 10px;
    line-height: 1.45;
    transition: var(--transition);
}

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

.related-card .card-body p {
    font-size: 14px;
    color: var(--text-muted);
    line-height: 1.65;
    margin-bottom: 18px;
    flex: 1;
}

.btn-text {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    font-size: 14px;
    font-weight: 600;
    color: var(--accent);
    transition: var(--transition);
}

.btn-text:hover {
    color: #fff;
    gap: 12px;
}

/* ===== FAQ ===== */
.faq-section {
    padding: 70px 0;
}

.accordion {
    max-width: 820px;
    margin: 0 auto;
}

.accordion-item {
    background: var(--bg-card);
    border: 1px solid var(--border-color) !important;
    border-radius: var(--radius-sm) !important;
    margin-bottom: 14px;
    overflow: hidden;
    box-shadow: var(--shadow-card);
    transition: var(--transition);
}

.accordion-item:not(:first-of-type) {
    border-top: 1px solid var(--border-color) !important;
}

.accordion-item:hover {
    border-color: rgba(var(--accent-rgb), .3) !important;
}

.accordion-button {
    background: var(--bg-card);
    color: var(--text-primary);
    font-size: 15px;
    font-weight: 600;
    padding: 18px 22px;
    box-shadow: none !important;
    transition: var(--transition);
}

.accordion-button:not(.collapsed) {
    background: rgba(var(--accent-rgb), .06);
    color: var(--accent);
}

.accordion-button::after {
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16' fill='%2300e5ff'%3E%3Cpath fill-rule='evenodd' d='M1.646 4.646a.5.5 0 0 1 .708 0L8 10.293l5.646-5.647a.5.5 0 0 1 .708.708l-6 6a.5.5 0 0 1-.708 0l-6-6a.5.5 0 0 1 0-.708z'/%3E%3C/svg%3E");
    transition: transform .3s;
}

.accordion-button:not(.collapsed)::after {
    filter: drop-shadow(0 0 4px rgba(var(--accent-rgb), .5));
}

.accordion-body {
    padding: 18px 22px 22px;
    color: var(--text-secondary);
    font-size: 15px;
    line-height: 1.75;
    background: rgba(10, 14, 23, .35);
    border-top: 1px solid rgba(255, 255, 255, .04);
}

/* ===== CTA ===== */
.cta-section {
    padding: 70px 0 80px;
}

.cta-box {
    position: relative;
    text-align: center;
    padding: 60px 40px;
    border-radius: var(--radius-lg);
    background: linear-gradient(135deg, rgba(var(--accent-rgb), .1), rgba(var(--accent-secondary-rgb), .08));
    border: 1px solid rgba(var(--accent-rgb), .25);
    overflow: hidden;
    box-shadow: var(--shadow-glow);
    isolation: isolate;
}

.cta-box::before {
    content: "";
    position: absolute;
    inset: 0;
    background: radial-gradient(ellipse at 30% 30%, rgba(var(--accent-rgb), .15), transparent 60%), radial-gradient(ellipse at 70% 70%, rgba(var(--accent-secondary-rgb), .12), transparent 50%);
    z-index: -1;
}

.cta-box::after {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 2px;
    background: linear-gradient(90deg, transparent, var(--accent), transparent);
}

.cta-box h2 {
    font-size: 2rem;
    font-weight: 800;
    color: var(--text-primary);
    margin-bottom: 14px;
}

.cta-box p {
    font-size: 16px;
    color: var(--text-secondary);
    max-width: 520px;
    margin: 0 auto 30px;
}

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

/* ===== Footer ===== */
.site-footer {
    background: #080c14;
    border-top: 1px solid var(--border-color);
    padding-top: 60px;
}

.site-footer::before {
    content: "";
    display: block;
    height: 1px;
    background: linear-gradient(90deg, transparent, rgba(var(--accent-rgb), .4), transparent);
    margin-bottom: 40px;
}

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

.footer-brand p {
    color: var(--text-muted);
    margin-top: 14px;
    font-size: 14px;
    line-height: 1.7;
    max-width: 340px;
}

.footer-links {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.footer-links h4 {
    color: var(--text-primary);
    font-size: 15px;
    font-weight: 700;
    margin-bottom: 16px;
    position: relative;
    padding-bottom: 10px;
}

.footer-links h4::after {
    content: "";
    position: absolute;
    bottom: 0;
    left: 0;
    width: 28px;
    height: 2px;
    background: var(--accent);
    border-radius: 2px;
}

.footer-links a {
    color: var(--text-muted);
    font-size: 14px;
    transition: var(--transition);
    display: inline-flex;
    align-items: center;
    gap: 6px;
}

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

.footer-bottom {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    padding: 22px 0;
    border-top: 1px solid var(--border-color);
    color: var(--text-muted);
    font-size: 13px;
}

.footer-bottom p {
    margin: 0;
    display: flex;
    align-items: center;
    gap: 6px;
}

/* ===== Animations ===== */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.article-hero-content {
    animation: fadeInUp .8s ease both;
}

.section-head {
    animation: fadeInUp .8s ease both;
}

/* ===== Responsive ===== */
@media (max-width: 1024px) {
    .article-hero h1 {
        font-size: 2.1rem;
    }

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

    .footer-brand {
        grid-column: 1 / -1;
    }
}

@media (max-width: 768px) {
    .header-row {
        min-height: 66px;
    }

    .nav-toggle {
        display: inline-flex;
    }

    .nav-collapse {
        position: fixed;
        top: 66px;
        left: 0;
        right: 0;
        background: rgba(10, 14, 23, .97);
        backdrop-filter: blur(20px);
        border-bottom: 1px solid var(--border-color);
        padding: 20px;
        display: none;
        flex-direction: column;
        align-items: stretch;
        box-shadow: 0 16px 40px rgba(0, 0, 0, .5);
        z-index: 999;
    }

    .nav-collapse.show {
        display: block;
    }

    .main-nav {
        flex-direction: column;
        align-items: stretch;
        gap: 6px;
    }

    .nav-link {
        padding: 13px 16px;
        font-size: 15px;
        border-radius: 10px;
    }

    .nav-link.active {
        background: rgba(var(--accent-rgb), .1);
    }

    .header-actions .btn-nav {
        display: none;
    }

    .article-hero {
        padding: 80px 0 60px;
    }

    .article-hero h1 {
        font-size: 1.7rem;
    }

    .article-card {
        padding: 24px;
    }

    .article-body {
        font-size: 15px;
        line-height: 1.75;
    }

    .sidebar {
        position: static;
        margin-top: 32px;
    }

    .related-section {
        padding: 50px 0 20px;
    }

    .faq-section,
    .cta-section {
        padding: 50px 0;
    }

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

    .cta-box h2 {
        font-size: 1.5rem;
    }

    .footer-top {
        grid-template-columns: 1fr;
        gap: 32px;
        padding-bottom: 30px;
    }

    .footer-bottom {
        flex-direction: column;
        text-align: center;
        padding: 18px 0;
    }
}

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

    .brand-mark {
        width: 36px;
        height: 36px;
        font-size: 15px;
        border-radius: 10px;
    }

    .article-hero h1 {
        font-size: 1.45rem;
    }

    .article-meta {
        flex-direction: column;
        gap: 6px;
    }

    .article-meta .dot {
        display: none;
    }

    .article-card {
        padding: 18px;
        border-radius: 14px;
    }

    .article-body h2 {
        font-size: 1.3rem;
    }

    .section-head h2 {
        font-size: 1.55rem;
    }

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

    .cta-buttons .btn-primary,
    .cta-buttons .btn-outline {
        justify-content: center;
    }

    .footer-bottom {
        font-size: 12px;
    }
}