/* roulang page: index */
:root {
  --primary: #C6FF3E;
  --primary-hover: #D6FF66;
  --primary-transparent: rgba(198, 255, 62, 0.12);
  --bg-root: #0B0D0F;
  --bg-sidebar: #101316;
  --bg-card: #181C20;
  --bg-elevated: #20252B;
  --bg-input: #0E1113;
  --text-main: #E9ECE6;
  --text-secondary: #A6AEA5;
  --text-muted: #6E766E;
  --border: rgba(255, 255, 255, 0.07);
  --border-strong: rgba(255, 255, 255, 0.14);
  --radius-card: 12px;
  --radius-btn: 8px;
  --radius-tag: 4px;
  --radius-input: 8px;
  --shadow-sm: 0 2px 12px rgba(0, 0, 0, 0.25);
  --shadow-md: 0 4px 24px rgba(0, 0, 0, 0.3);
  --shadow-lg: 0 10px 40px rgba(0, 0, 0, 0.45);
  --transition: 200ms ease-out;
  --sidebar-width: 240px;
  --container-max: 1200px;
  --spacing-section: 100px;
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
  --font-mono: "SF Mono", "JetBrains Mono", "Fira Code", "Roboto Mono", monospace;
}

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

html { scroll-behavior: smooth; }

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

a { color: inherit; text-decoration: none; }
img { display: block; max-width: 100%; }
button, input { font-family: inherit; border: none; outline: none; background: transparent; }
ul, ol { list-style: none; }

.container {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 32px;
}

.main-wrapper {
  margin-left: var(--sidebar-width);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

/* ====== Sidebar ====== */
.sidebar {
  position: fixed;
  top: 0; left: 0; bottom: 0;
  width: var(--sidebar-width);
  background: var(--bg-sidebar);
  border-right: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  z-index: 100;
  padding: 36px 24px 24px;
  transition: width var(--transition);
}

.brand {
  display: block;
  font-size: 20px;
  font-weight: 800;
  letter-spacing: 1px;
  color: var(--text-main);
  line-height: 1.4;
  padding: 8px 4px 8px 8px;
  border-left: 3px solid var(--primary);
  transition: color var(--transition);
}
.brand:hover { color: var(--primary); }

.sidebar-nav {
  margin-top: 56px;
  display: flex;
  flex-direction: column;
  gap: 4px;
  flex: 1;
}

.nav-link {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 12px 14px;
  border-radius: 8px;
  font-size: 15px;
  font-weight: 500;
  color: var(--text-secondary);
  border-left: 2px solid transparent;
  transition: all var(--transition);
  position: relative;
}
.nav-link .nav-icon {
  width: 28px;
  height: 28px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 6px;
  background: rgba(255, 255, 255, 0.05);
  font-size: 13px;
  font-weight: 700;
  color: var(--text-muted);
  transition: all var(--transition);
  flex-shrink: 0;
}
.nav-link:hover {
  color: var(--text-main);
  background: rgba(255, 255, 255, 0.04);
}
.nav-link:hover .nav-icon {
  background: var(--primary-transparent);
  color: var(--primary);
}
.nav-link.active {
  color: var(--text-main);
  border-left-color: var(--primary);
}
.nav-link.active .nav-icon {
  background: var(--primary);
  color: #0B0D0F;
}
.nav-link.active::after {
  content: "";
  position: absolute;
  right: 0;
  top: 50%;
  transform: translateY(-50%);
  width: 2px;
  height: 18px;
  background: var(--primary);
  border-radius: 2px;
}

.sidebar-foot {
  padding: 16px 8px 0;
  border-top: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  gap: 6px;
  font-size: 12px;
  color: var(--text-muted);
  line-height: 1.5;
}

/* ====== Mobile Header ====== */
.mobile-header {
  display: none;
  position: sticky;
  top: 0;
  z-index: 90;
  height: 60px;
  background: rgba(11, 13, 15, 0.94);
  border-bottom: 1px solid var(--border);
  backdrop-filter: blur(10px);
  padding: 0 24px;
  align-items: center;
  justify-content: space-between;
}
.mobile-brand {
  font-size: 17px;
  font-weight: 800;
  letter-spacing: 0.5px;
  color: var(--text-main);
  border-left: 3px solid var(--primary);
  padding-left: 10px;
  line-height: 1.3;
}
.menu-toggle {
  width: 42px;
  height: 42px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 5px;
  cursor: pointer;
  border-radius: 6px;
  transition: background var(--transition);
}
.menu-toggle:hover { background: rgba(255, 255, 255, 0.05); }
.menu-toggle span {
  width: 20px;
  height: 2px;
  background: var(--text-main);
  border-radius: 2px;
  transition: all var(--transition);
}

.mobile-menu {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(6, 8, 10, 0.98);
  z-index: 200;
  padding: 40px 32px;
  flex-direction: column;
}
.mobile-menu.show { display: flex; }
.menu-close {
  align-self: flex-end;
  font-size: 40px;
  line-height: 1;
  color: var(--text-secondary);
  cursor: pointer;
  width: 44px;
  height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 8px;
  transition: all var(--transition);
}
.menu-close:hover { color: var(--primary); background: rgba(255,255,255,0.05); }
.mobile-nav-link {
  font-size: 22px;
  font-weight: 700;
  padding: 20px 8px;
  border-bottom: 1px solid var(--border);
  color: var(--text-secondary);
  transition: all var(--transition);
}
.mobile-nav-link:hover, .mobile-nav-link.active {
  color: var(--primary);
  padding-left: 16px;
}

/* ====== Buttons ====== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  height: 44px;
  padding: 0 28px;
  border-radius: var(--radius-btn);
  font-size: 15px;
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition);
  user-select: none;
  white-space: nowrap;
  position: relative;
}
.btn:focus-visible {
  outline: 2px solid var(--primary);
  outline-offset: 3px;
}
.btn:active { transform: translateY(1px) scale(0.98); }

.btn-primary {
  background: var(--primary);
  color: #0B0D0F;
  border: 1px solid transparent;
}
.btn-primary:hover {
  background: var(--primary-hover);
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(198, 255, 62, 0.18);
}
.btn-primary:active {
  transform: translateY(1px);
  box-shadow: none;
}

.btn-outline {
  background: transparent;
  color: var(--text-main);
  border: 1px solid rgba(255, 255, 255, 0.2);
}
.btn-outline:hover {
  border-color: var(--primary);
  color: var(--primary);
  transform: translateY(-2px);
  background: var(--primary-transparent);
}

.btn-lg {
  height: 56px;
  font-size: 17px;
  padding: 0 36px;
}

.btn .arrow {
  transition: transform var(--transition);
  display: inline-block;
}
.btn:hover .arrow { transform: translateX(4px); }

/* ====== Hero ====== */
.hero {
  position: relative;
  min-height: calc(100vh - 0px);
  display: flex;
  align-items: center;
  padding: 80px 32px 100px;
  overflow: hidden;
}
.hero-bg {
  position: absolute;
  inset: 0;
  background-size: cover;
  background-position: center;
  z-index: 0;
}
.hero-overlay {
  position: absolute;
  inset: 0;
  background: rgba(11, 13, 15, 0.72);
  z-index: 1;
}
.hero-content {
  position: relative;
  z-index: 2;
  max-width: 760px;
}
.hero-eyebrow {
  font-size: 14px;
  font-weight: 600;
  letter-spacing: 3px;
  text-transform: uppercase;
  color: var(--primary);
  margin-bottom: 20px;
  display: flex;
  align-items: center;
  gap: 10px;
}
.hero-eyebrow::before {
  content: "";
  width: 32px;
  height: 2px;
  background: var(--primary);
  display: inline-block;
}
.hero-content h1 {
  font-size: 46px;
  font-weight: 800;
  line-height: 1.25;
  letter-spacing: -0.5px;
  margin-bottom: 24px;
  color: var(--text-main);
}
.hero-sub {
  font-size: 18px;
  line-height: 1.8;
  color: var(--text-secondary);
  margin-bottom: 36px;
  max-width: 580px;
}
.hero-actions {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}
.hero-decor {
  position: absolute;
  right: 24px;
  bottom: 24px;
  font-family: var(--font-mono);
  font-size: clamp(100px, 22vw, 260px);
  font-weight: 800;
  color: rgba(255, 255, 255, 0.04);
  letter-spacing: -0.05em;
  z-index: 1;
  line-height: 1;
  pointer-events: none;
  user-select: none;
}

/* ====== Section Common ====== */
.section-head {
  display: flex;
  align-items: baseline;
  gap: 20px;
  margin-bottom: 48px;
}
.section-head h2 {
  font-size: 36px;
  font-weight: 800;
  line-height: 1.2;
  letter-spacing: -0.3px;
  color: var(--text-main);
  position: relative;
}
.section-head h2::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -8px;
  width: 100%;
  height: 3px;
  background: linear-gradient(90deg, var(--primary), transparent);
  border-radius: 2px;
}
.section-en {
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--text-muted);
  letter-spacing: 2px;
  text-transform: uppercase;
  padding-top: 6px;
}

/* ====== Event Section ====== */
.event-section {
  padding: var(--spacing-section) 0;
  background: var(--bg-root);
  position: relative;
}
.event-section::before {
  content: "";
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--border-strong), transparent);
}

/* Countdown */
.countdown-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-card);
  padding: 20px 28px;
  margin-bottom: 48px;
  gap: 24px;
  flex-wrap: wrap;
  transition: border-color var(--transition);
}
.countdown-bar:hover { border-color: var(--border-strong); }
.countdown-label {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 15px;
  font-weight: 600;
  color: var(--text-main);
}
.countdown-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--primary);
  box-shadow: 0 0 0 4px var(--primary-transparent);
  animation: pulse 2s infinite;
}
@keyframes pulse {
  0%, 100% { box-shadow: 0 0 0 4px var(--primary-transparent); }
  50% { box-shadow: 0 0 0 7px rgba(198, 255, 62, 0.05); }
}
.countdown-time {
  display: flex;
  align-items: center;
  gap: 20px;
  flex-wrap: wrap;
}
.countdown-end {
  font-size: 14px;
  color: var(--text-secondary);
}
.countdown-nums {
  display: flex;
  align-items: center;
  gap: 6px;
}
.cd-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  min-width: 48px;
}
.cd-num {
  font-family: var(--font-mono);
  font-size: 28px;
  font-weight: 700;
  color: var(--text-main);
  line-height: 1.2;
  min-width: 40px;
  text-align: center;
  background: var(--bg-elevated);
  border-radius: 8px;
  padding: 6px 0;
  transition: transform 200ms ease-out;
}
.cd-num.flip { animation: flipIn 300ms ease-out; }
@keyframes flipIn {
  0% { transform: scale(1.4); opacity: 0.4; }
  100% { transform: scale(1); opacity: 1; }
}
.cd-unit {
  font-size: 12px;
  color: var(--text-muted);
  margin-top: 4px;
}
.cd-sep {
  font-family: var(--font-mono);
  font-size: 22px;
  color: var(--text-muted);
  margin-top: -14px;
}

/* Feature List */
.feature-list {
  margin-bottom: 56px;
}
.feature-item {
  display: flex;
  align-items: flex-start;
  gap: 28px;
  padding: 28px 0;
  border-bottom: 1px solid var(--border);
  transition: all var(--transition);
}
.feature-item:first-of-type { border-top: 1px solid var(--border); }
.feature-item:hover { background: rgba(255, 255, 255, 0.015); padding-left: 12px; }
.feature-num {
  font-family: var(--font-mono);
  font-size: 18px;
  font-weight: 700;
  color: var(--primary);
  flex-shrink: 0;
  width: 48px;
  line-height: 1.4;
  padding-top: 2px;
}
.feature-item h3 {
  font-size: 20px;
  font-weight: 700;
  color: var(--text-main);
  margin-bottom: 6px;
}
.feature-item p {
  font-size: 15px;
  color: var(--text-secondary);
  line-height: 1.7;
  max-width: 560px;
}

/* Gallery Grid */
.gallery-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
  margin-bottom: 56px;
}
.gallery-item {
  position: relative;
  overflow: hidden;
  border-radius: var(--radius-card);
  aspect-ratio: 4 / 3;
  cursor: pointer;
  background: var(--bg-card);
  border: 1px solid var(--border);
  transition: all var(--transition);
}
.gallery-item.gallery-lg {
  grid-column: span 2;
  aspect-ratio: 8 / 3;
}
.gallery-item img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 300ms ease-out;
}
.gallery-item:hover { border-color: var(--primary); box-shadow: var(--shadow-md); }
.gallery-item:hover img { transform: scale(1.03); }
.gallery-item figcaption {
  position: absolute;
  bottom: 0; left: 0; right: 0;
  padding: 32px 20px 16px;
  font-size: 14px;
  font-weight: 500;
  color: var(--text-main);
  background: linear-gradient(transparent, rgba(0,0,0,0.75));
}

/* Event CTA */
.event-cta {
  background: var(--bg-card);
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-card);
  padding: 48px;
  text-align: center;
  margin-bottom: 56px;
  position: relative;
  overflow: hidden;
  box-shadow: var(--shadow-md);
}
.event-cta::before {
  content: "";
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 2px;
  background: var(--primary);
}
.event-cta h3 {
  font-size: 28px;
  font-weight: 800;
  color: var(--text-main);
  margin-bottom: 12px;
}
.event-cta p {
  font-size: 15px;
  color: var(--text-secondary);
  margin-bottom: 28px;
}
.cta-form {
  display: flex;
  gap: 12px;
  max-width: 480px;
  margin: 0 auto;
  flex-wrap: wrap;
}
.cta-form input[type="email"] {
  flex: 1;
  min-width: 220px;
  height: 48px;
  background: var(--bg-input);
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-input);
  padding: 0 18px;
  font-size: 15px;
  color: var(--text-main);
  transition: all var(--transition);
}
.cta-form input[type="email"]::placeholder { color: var(--text-muted); }
.cta-form input[type="email"]:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 4px var(--primary-transparent);
}
.form-success {
  color: var(--primary);
  font-weight: 500;
  padding: 12px 0;
}

/* FAQ */
.faq-block h3 {
  font-size: 22px;
  font-weight: 700;
  color: var(--text-main);
  margin-bottom: 24px;
}
.faq-list { display: flex; flex-direction: column; gap: 12px; }
.faq-item {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-card);
  overflow: hidden;
  transition: all var(--transition);
}
.faq-item:hover { border-color: var(--border-strong); }
.faq-item.open { border-color: var(--primary); }
.faq-q {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  padding: 0 24px;
  min-height: 54px;
  font-size: 17px;
  font-weight: 600;
  color: var(--text-main);
  cursor: pointer;
  text-align: left;
  transition: all var(--transition);
  position: relative;
}
.faq-q::before {
  content: "";
  position: absolute;
  left: 0;
  top: 50%;
  transform: translateY(-50%);
  width: 2px;
  height: 0;
  background: var(--primary);
  transition: height var(--transition);
}
.faq-item:hover .faq-q::before { height: 20px; }
.faq-item.open .faq-q::before { height: 24px; }
.faq-icon {
  width: 28px;
  height: 28px;
  flex-shrink: 0;
  position: relative;
}
.faq-icon::before, .faq-icon::after {
  content: "";
  position: absolute;
  top: 50%; left: 50%;
  background: var(--text-secondary);
  transition: all 300ms ease;
}
.faq-icon::before {
  width: 14px; height: 2px;
  transform: translate(-50%, -50%);
}
.faq-icon::after {
  width: 2px; height: 14px;
  transform: translate(-50%, -50%);
}
.faq-item.open .faq-icon::after { transform: translate(-50%, -50%) rotate(90deg); opacity: 1; }
.faq-item.open .faq-icon::before { background: var(--primary); }
.faq-item.open .faq-icon::after { background: var(--primary); }
.faq-a {
  max-height: 0;
  overflow: hidden;
  transition: max-height 300ms ease;
}
.faq-item.open .faq-a { max-height: 300px; }
.faq-a p {
  padding: 0 24px 20px;
  font-size: 14px;
  line-height: 1.8;
  color: var(--text-secondary);
}

/* ====== News Section ====== */
.news-section {
  padding: var(--spacing-section) 0;
  background: #0E1113;
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}
.news-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
}
.news-card {
  display: flex;
  flex-direction: column;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-card);
  padding: 28px;
  transition: all var(--transition);
  position: relative;
  overflow: hidden;
}
.news-card::before {
  content: "";
  position: absolute;
  top: 0; left: 0;
  width: 2px;
  height: 0;
  background: var(--primary);
  transition: height var(--transition);
}
.news-card:hover::before { height: 100%; }
.news-card:hover {
  border-color: var(--border-strong);
  box-shadow: var(--shadow-md);
  transform: translateY(-3px);
}
.news-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 16px;
}
.tag {
  display: inline-flex;
  align-items: center;
  height: 24px;
  padding: 0 12px;
  background: rgba(255, 255, 255, 0.06);
  border-radius: var(--radius-tag);
  font-size: 12px;
  font-weight: 500;
  color: var(--text-secondary);
  transition: all var(--transition);
}
.tag:hover { background: var(--primary); color: #0B0D0F; }
.news-date {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--text-muted);
}
.news-card h3 {
  font-size: 19px;
  font-weight: 700;
  line-height: 1.5;
  color: var(--text-main);
  margin-bottom: 10px;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.news-card p {
  font-size: 14px;
  line-height: 1.7;
  color: var(--text-secondary);
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  margin-bottom: 20px;
  flex: 1;
}
.news-bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 13px;
  color: var(--text-muted);
  padding-top: 16px;
  border-top: 1px solid var(--border);
  transition: color var(--transition);
}
.news-card:hover .news-bottom { color: var(--text-secondary); }
.read-more { display: inline-flex; align-items: center; gap: 4px; transition: all var(--transition); }
.read-more .arrow { transition: transform var(--transition); }
.news-card:hover .read-more { color: var(--primary); }
.news-card:hover .read-more .arrow { transform: translateX(4px); }

.empty-state {
  grid-column: 1 / -1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 56px 24px;
  gap: 16px;
  color: var(--text-muted);
}
.empty-state p {
  font-size: 15px;
  color: var(--text-muted);
}

/* ====== Advantages ====== */
.advantages {
  padding: var(--spacing-section) 0;
  background: var(--bg-root);
}
.advantage-row { display: flex; flex-direction: column; }
.advantage-item {
  display: flex;
  align-items: center;
  gap: 40px;
  padding: 36px 0;
  border-bottom: 1px solid var(--border);
  transition: all var(--transition);
}
.advantage-item:first-of-type { border-top: 1px solid var(--border); }
.advantage-item:hover { padding-left: 16px; }
.advantage-num {
  font-family: var(--font-mono);
  font-size: 52px;
  font-weight: 800;
  color: var(--primary);
  letter-spacing: -2px;
  line-height: 1;
  min-width: 180px;
  flex-shrink: 0;
}
.advantage-item h3 {
  font-size: 20px;
  font-weight: 700;
  color: var(--text-main);
  margin-bottom: 6px;
}
.advantage-item p {
  font-size: 15px;
  color: var(--text-secondary);
  line-height: 1.7;
  max-width: 560px;
}

/* ====== CTA Band ====== */
.cta-band {
  padding: 80px 0;
  background: var(--bg-card);
  border-top: 1px solid var(--border);
  text-align: center;
  position: relative;
  overflow: hidden;
}
.cta-band::before {
  content: "";
  position: absolute;
  top: 0; left: 50%;
  transform: translateX(-50%);
  width: 200px;
  height: 2px;
  background: var(--primary);
}
.cta-band h2 {
  font-size: 32px;
  font-weight: 800;
  color: var(--text-main);
  margin-bottom: 12px;
}
.cta-band p {
  font-size: 16px;
  color: var(--text-secondary);
  margin-bottom: 32px;
}

/* ====== Footer ====== */
.footer {
  background: #080A0C;
  padding: 64px 0 0;
  border-top: 1px solid var(--border);
  margin-top: auto;
}
.footer-top {
  display: grid;
  grid-template-columns: 1.4fr 1fr;
  gap: 48px;
  padding-bottom: 48px;
  border-bottom: 1px solid var(--border);
}
.footer-brand h3 {
  font-size: 22px;
  font-weight: 800;
  color: var(--text-main);
  margin-bottom: 12px;
  border-left: 3px solid var(--primary);
  padding-left: 10px;
}
.footer-brand p {
  font-size: 14px;
  color: var(--text-secondary);
  max-width: 400px;
  line-height: 1.8;
}
.footer-links {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
}
.footer-col h4 {
  font-size: 14px;
  font-weight: 600;
  color: var(--text-main);
  margin-bottom: 16px;
  letter-spacing: 1px;
}
.footer-col a {
  display: block;
  font-size: 14px;
  color: var(--text-secondary);
  padding: 6px 0;
  transition: all var(--transition);
}
.footer-col a:hover {
  color: var(--primary);
  padding-left: 6px;
}
.footer-bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 20px 0;
  font-size: 13px;
  color: var(--text-muted);
  flex-wrap: wrap;
}

/* ====== Scrollbar ====== */
::-webkit-scrollbar { width: 8px; height: 8px; }
::-webkit-scrollbar-track { background: var(--bg-root); }
::-webkit-scrollbar-thumb { background: rgba(255,255,255,0.12); border-radius: 4px; }
::-webkit-scrollbar-thumb:hover { background: rgba(255,255,255,0.2); }

::selection { background: var(--primary); color: #0B0D0F; }

/* ====== Responsive ====== */
@media (max-width: 1199px) {
  .sidebar { width: 72px; padding: 24px 12px; align-items: center; }
  .brand { font-size: 0; border-left: none; padding: 0; width: 40px; text-align: center; }
  .brand::first-letter { font-size: 20px; }
  .brand { display: flex; align-items: center; justify-content: center; width: 44px; height: 44px; background: var(--primary-transparent); border-radius: 8px; color: var(--primary); font-size: 22px; font-weight: 800; }
  .nav-link { justify-content: center; padding: 14px 0; }
  .nav-text { display: none; }
  .nav-link.active::after { display: none; }
  .sidebar-foot { font-size: 0; }
  .sidebar-foot span:last-child { font-size: 11px; }
  .main-wrapper { margin-left: 72px; }
  .hero { padding: 60px 24px 80px; }
  .hero-content h1 { font-size: 38px; }
}

@media (max-width: 767px) {
  .sidebar { display: none; }
  .main-wrapper { margin-left: 0; }
  .mobile-header { display: flex; }
  .container { padding: 0 20px; }
  .hero {
    min-height: 65vh;
    padding: 80px 20px 80px;
  }
  .hero-content h1 { font-size: 30px; }
  .hero-sub { font-size: 16px; }
  .hero-actions { flex-direction: column; gap: 12px; }
  .hero-actions .btn { width: 100%; }
  .hero-decor { font-size: 100px; opacity: 0.5; }
  .section-head { flex-direction: column; gap: 8px; margin-bottom: 32px; }
  .section-head h2 { font-size: 28px; }
  .countdown-bar { flex-direction: column; align-items: flex-start; padding: 20px; }
  .countdown-time { width: 100%; justify-content: space-between; align-items: flex-start; flex-direction: column; gap: 10px; }
  .countdown-nums { width: 100%; justify-content: center; }
  .feature-item { flex-direction: column; gap: 12px; padding: 24px 0; }
  .feature-num { width: auto; font-size: 16px; }
  .gallery-grid { grid-template-columns: 1fr; }
  .gallery-item, .gallery-item.gallery-lg { grid-column: 1; aspect-ratio: 4 / 3; }
  .event-cta { padding: 32px 20px; }
  .cta-form { flex-direction: column; }
  .cta-form input[type="email"] { width: 100%; }
  .cta-form .btn { width: 100%; }
  .news-grid { grid-template-columns: 1fr; }
  .advantage-item { flex-direction: column; gap: 16px; align-items: flex-start; }
  .advantage-num { font-size: 40px; min-width: auto; }
  .footer-top { grid-template-columns: 1fr; gap: 32px; }
  .footer-links { grid-template-columns: 1fr 1fr; }
  .footer-bottom { flex-direction: column; text-align: center; }
  .cta-band h2 { font-size: 24px; }
  .cta-band .btn { width: 100%; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
  }
  html { scroll-behavior: auto; }
}

/* roulang page: article */
/* ========== 设计变量 ========== */
:root {
  --primary: #C6FF3E;
  --primary-hover: #D4FF6E;
  --primary-dim: rgba(198, 255, 62, 0.12);
  --bg-body: #0B0D10;
  --bg-sidebar: #080A0C;
  --bg-card: #14181D;
  --bg-elevated: #1A1F25;
  --text-main: #F0F2F5;
  --text-sub: #9CA3AF;
  --text-dim: #6B7280;
  --border: rgba(255, 255, 255, 0.08);
  --border-hover: rgba(198, 255, 62, 0.4);
  --radius-card: 12px;
  --radius-btn: 8px;
  --radius-tag: 4px;
  --shadow: 0 10px 30px rgba(0, 0, 0, 0.25);
  --shadow-hover: 0 16px 40px rgba(0, 0, 0, 0.35);
  --transition: all 0.3s ease-out;
  --font-sans: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", "Noto Sans SC", "Segoe UI", sans-serif;
  --font-mono: "JetBrains Mono", "SF Mono", Consolas, monospace;
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-sans);
  background: var(--bg-body);
  color: var(--text-main);
  line-height: 1.8;
  font-size: 15px;
  -webkit-font-smoothing: antialiased;
  min-height: 100vh;
}

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

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

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

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 40px;
}

/* ========== 左侧导航 ========== */
.sidebar {
  position: fixed;
  top: 0;
  left: 0;
  width: 240px;
  height: 100vh;
  background: var(--bg-sidebar);
  border-right: 1px solid var(--border);
  z-index: 1000;
  overflow-y: auto;
}

.sidebar-inner {
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  height: 100%;
  padding: 40px 28px 24px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 14px;
  margin-bottom: 64px;
}

.brand-mark {
  width: 40px;
  height: 40px;
  border-radius: 10px;
  background: var(--primary);
  color: #0B0D10;
  font-size: 20px;
  font-weight: 800;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  letter-spacing: 0;
}

.brand-text {
  font-size: 16px;
  font-weight: 700;
  line-height: 1.4;
  letter-spacing: 0.02em;
}

.sidebar-nav {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.nav-link {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 13px 14px;
  border-radius: 10px;
  color: var(--text-sub);
  font-size: 15px;
  font-weight: 500;
  border: 1px solid transparent;
  transition: var(--transition);
}

.nav-link .nav-icon {
  width: 32px;
  height: 32px;
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.05);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 13px;
  color: var(--text-sub);
  transition: var(--transition);
}

.nav-link:hover {
  color: var(--text-main);
  background: rgba(255, 255, 255, 0.03);
}

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

.nav-link.active {
  color: var(--text-main);
  background: rgba(255, 255, 255, 0.04);
  border-color: rgba(198, 255, 62, 0.25);
  position: relative;
}

.nav-link.active::before {
  content: "";
  position: absolute;
  left: 0;
  top: 20%;
  height: 60%;
  width: 3px;
  background: var(--primary);
  border-radius: 0 3px 3px 0;
}

.nav-link.active .nav-icon {
  background: var(--primary);
  color: #0B0D10;
}

.sidebar-footer {
  padding-top: 24px;
  border-top: 1px solid var(--border);
  font-size: 12px;
  color: var(--text-dim);
  line-height: 1.6;
}

/* ========== 移动端头部 ========== */
.mobile-header {
  display: none;
  position: sticky;
  top: 0;
  z-index: 1000;
  height: 64px;
  background: rgba(8, 10, 12, 0.95);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
  align-items: center;
  justify-content: space-between;
  padding: 0 20px;
}

.mobile-header .brand {
  margin-bottom: 0;
}

.menu-toggle {
  width: 42px;
  height: 42px;
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--border);
  color: var(--text-main);
  font-size: 18px;
  cursor: pointer;
  transition: var(--transition);
}

.menu-toggle:hover {
  border-color: var(--primary);
  color: var(--primary);
}

.mobile-menu {
  display: none;
  position: fixed;
  inset: 0;
  top: 0;
  background: rgba(8, 10, 12, 0.98);
  z-index: 2000;
  padding: 24px;
  flex-direction: column;
}

.mobile-menu.open {
  display: flex;
}

.mobile-menu-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 48px;
}

.menu-close {
  width: 42px;
  height: 42px;
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--border);
  color: var(--text-main);
  font-size: 18px;
  cursor: pointer;
  transition: var(--transition);
}

.menu-close:hover {
  border-color: var(--primary);
  color: var(--primary);
}

.mobile-menu nav {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.mobile-menu nav a {
  font-size: 24px;
  font-weight: 700;
  color: var(--text-sub);
  padding: 16px 8px;
  border-bottom: 1px solid var(--border);
  transition: var(--transition);
}

.mobile-menu nav a:hover,
.mobile-menu nav a.active {
  color: var(--primary);
  border-color: var(--primary);
}

/* ========== 主内容区 ========== */
.main-content {
  margin-left: 240px;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

.main-content .container {
  flex: 1;
  padding-bottom: 80px;
}

/* ========== 面包屑 ========== */
.breadcrumb {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px;
  padding: 32px 0 24px;
  font-size: 14px;
  color: var(--text-sub);
}

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

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

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

.breadcrumb .current {
  color: var(--text-main);
  font-weight: 500;
  max-width: 320px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

/* ========== 文章头部 ========== */
.article-header {
  padding: 24px 0 40px;
  border-bottom: 1px solid var(--border);
  margin-bottom: 48px;
}

.article-meta {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 16px;
  margin-bottom: 18px;
}

.tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  height: 28px;
  padding: 0 14px;
  border-radius: var(--radius-tag);
  background: var(--primary);
  color: #0B0D10;
  font-size: 13px;
  font-weight: 700;
  line-height: 1;
}

.article-meta .info-item {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 14px;
  color: var(--text-sub);
}

.article-meta .info-item i {
  font-size: 13px;
  color: var(--text-dim);
}

.article-header h1 {
  font-size: 38px;
  font-weight: 800;
  line-height: 1.3;
  letter-spacing: -0.02em;
  max-width: 840px;
}

/* ========== 正文区域 ========== */
.article-body {
  margin-bottom: 72px;
}

.article-content {
  max-width: 720px;
  margin: 0 auto;
  font-size: 16px;
  line-height: 1.9;
  color: #B8BFC9;
}

.article-content > * {
  margin-bottom: 24px;
}

.article-content > *:last-child {
  margin-bottom: 0;
}

.article-content h2 {
  font-size: 26px;
  font-weight: 700;
  color: var(--text-main);
  margin-top: 48px;
  margin-bottom: 16px;
  letter-spacing: -0.01em;
  line-height: 1.4;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--border);
}

.article-content h3 {
  font-size: 21px;
  font-weight: 600;
  color: var(--text-main);
  margin-top: 32px;
  margin-bottom: 12px;
}

.article-content p {
  margin-bottom: 24px;
}

.article-content a {
  color: var(--primary);
  text-decoration: underline;
  text-underline-offset: 4px;
  text-decoration-thickness: 1px;
}

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

.article-content img {
  border-radius: 10px;
  margin: 32px 0;
  border: 1px solid var(--border);
}

.article-content blockquote {
  border-left: 3px solid var(--primary);
  padding: 16px 24px;
  background: var(--primary-dim);
  border-radius: 0 10px 10px 0;
  color: var(--text-sub);
  font-size: 15px;
  margin: 28px 0;
}

.article-content code {
  background: var(--bg-elevated);
  padding: 3px 8px;
  border-radius: 5px;
  font-size: 14px;
  font-family: var(--font-mono);
  color: var(--primary);
}

.article-content pre {
  background: #101317;
  border: 1px solid var(--border);
  border-radius: var(--radius-card);
  padding: 20px 24px;
  overflow-x: auto;
  margin: 28px 0;
  font-size: 14px;
  line-height: 1.7;
}

.article-content pre code {
  background: none;
  padding: 0;
  color: #D1D5DB;
}

.article-content ul,
.article-content ol {
  padding-left: 24px;
  margin-bottom: 24px;
}

.article-content ul li,
.article-content ol li {
  margin-bottom: 10px;
}

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

.article-content hr {
  border: none;
  border-top: 1px solid var(--border);
  margin: 40px 0;
}

/* ========== 内容未找到 ========== */
.not-found {
  max-width: 720px;
  margin: 0 auto;
  text-align: center;
  padding: 80px 24px;
  border: 1px dashed var(--border);
  border-radius: var(--radius-card);
  background: var(--bg-card);
}

.not-found h1 {
  font-size: 26px;
  font-weight: 700;
  margin-bottom: 12px;
}

.not-found p {
  color: var(--text-sub);
  margin-bottom: 24px;
}

.not-found .btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

/* ========== 相关推荐 ========== */
.related-section {
  padding: 56px 0 64px;
  border-top: 1px solid var(--border);
}

.related-section .section-head {
  display: flex;
  align-items: baseline;
  gap: 12px;
  margin-bottom: 32px;
}

.related-section .section-head h2 {
  font-size: 28px;
  font-weight: 800;
  letter-spacing: -0.02em;
}

.related-section .section-head span {
  font-size: 13px;
  color: var(--text-dim);
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

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

.related-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-card);
  overflow: hidden;
  transition: var(--transition);
}

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

.related-card .card-img {
  position: relative;
  aspect-ratio: 16 / 9;
  overflow: hidden;
}

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

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

.related-card .card-img::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, transparent 60%, rgba(0, 0, 0, 0.4));
}

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

.related-card .card-tag {
  display: inline-block;
  font-size: 12px;
  color: var(--primary);
  font-weight: 700;
  margin-bottom: 8px;
  letter-spacing: 0.04em;
}

.related-card .card-title {
  font-size: 16px;
  font-weight: 600;
  line-height: 1.5;
  color: var(--text-main);
  margin-bottom: 10px;
  display: -webkit-box;
  -webkit-box-orient: vertical;
  -webkit-line-clamp: 2;
  overflow: hidden;
  transition: var(--transition);
}

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

.related-card .card-meta {
  font-size: 13px;
  color: var(--text-dim);
  display: flex;
  align-items: center;
  gap: 12px;
}

.related-bottom-links {
  margin-top: 40px;
  text-align: center;
  font-size: 15px;
}

.related-bottom-links a {
  color: var(--text-sub);
  margin: 0 12px;
  transition: var(--transition);
}

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

/* ========== CTA ========== */
.cta-section {
  border-radius: var(--radius-card);
  background: var(--bg-card);
  border: 1px solid var(--border);
  padding: 56px 48px;
  text-align: center;
  margin-top: 72px;
  position: relative;
  overflow: hidden;
}

.cta-section::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: var(--primary);
}

.cta-section h2 {
  font-size: 30px;
  font-weight: 800;
  margin-bottom: 12px;
  letter-spacing: -0.02em;
}

.cta-section p {
  color: var(--text-sub);
  font-size: 16px;
  margin-bottom: 28px;
  max-width: 560px;
  margin-left: auto;
  margin-right: auto;
}

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

/* ========== 按钮 ========== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  height: 44px;
  padding: 0 28px;
  border-radius: var(--radius-btn);
  font-size: 15px;
  font-weight: 700;
  letter-spacing: 0.02em;
  cursor: pointer;
  transition: var(--transition);
  border: 1px solid transparent;
}

.btn-large {
  height: 54px;
  padding: 0 36px;
  font-size: 17px;
}

.btn-primary {
  background: var(--primary);
  color: #0B0D10;
}

.btn-primary:hover {
  background: var(--primary-hover);
  transform: translateY(-2px);
  box-shadow: 0 12px 30px rgba(198, 255, 62, 0.2);
}

.btn-primary:focus-visible,
.btn-outline:focus-visible {
  outline: 2px solid var(--primary);
  outline-offset: 3px;
}

.btn-primary:active {
  transform: translateY(0);
  box-shadow: none;
}

.btn-outline {
  background: transparent;
  border-color: rgba(255, 255, 255, 0.2);
  color: var(--text-main);
}

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

.btn-outline:active {
  transform: translateY(0);
}

/* ========== 返回顶部 ========== */
.back-top {
  position: fixed;
  bottom: 32px;
  right: 32px;
  width: 44px;
  height: 44px;
  border-radius: 10px;
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-sub);
  cursor: pointer;
  font-size: 16px;
  z-index: 900;
  transition: var(--transition);
  opacity: 0;
  visibility: hidden;
}

.back-top.visible {
  opacity: 1;
  visibility: visible;
}

.back-top:hover {
  border-color: var(--primary);
  color: var(--primary);
  transform: translateY(-3px);
}

/* ========== 页脚 ========== */
.footer {
  background: #080A0C;
  border-top: 1px solid var(--border);
  margin-top: auto;
}

.footer .container {
  padding-top: 56px;
  padding-bottom: 32px;
}

.footer-top {
  display: flex;
  justify-content: space-between;
  gap: 48px;
  flex-wrap: wrap;
  padding-bottom: 40px;
  border-bottom: 1px solid var(--border);
}

.footer-brand {
  max-width: 320px;
}

.footer-brand h3 {
  font-size: 20px;
  font-weight: 800;
  margin-bottom: 8px;
  letter-spacing: -0.01em;
}

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

.footer-links {
  display: flex;
  gap: 64px;
  flex-wrap: wrap;
}

.footer-col h4 {
  font-size: 14px;
  font-weight: 700;
  color: var(--text-main);
  margin-bottom: 16px;
  letter-spacing: 0.04em;
}

.footer-col a {
  display: block;
  color: var(--text-sub);
  font-size: 14px;
  padding: 4px 0;
  transition: var(--transition);
}

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

.footer-bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
  padding-top: 24px;
  font-size: 13px;
  color: var(--text-dim);
}

/* ========== 响应式 ========== */
@media (max-width: 1200px) {
  .sidebar {
    width: 72px;
  }

  .sidebar-inner {
    padding: 24px 12px;
    align-items: center;
  }

  .brand {
    justify-content: center;
    margin-bottom: 40px;
  }

  .brand-text {
    display: none;
  }

  .nav-link {
    justify-content: center;
    padding: 12px;
  }

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

  .nav-link .nav-icon {
    width: 36px;
    height: 36px;
    font-size: 14px;
  }

  .sidebar-footer {
    display: none;
  }

  .main-content {
    margin-left: 72px;
  }
}

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

  .mobile-header {
    display: flex;
  }

  .mobile-menu {
    display: none;
  }

  .mobile-menu.open {
    display: flex;
    align-items: flex-start;
    justify-content: flex-start;
  }

  .main-content {
    margin-left: 0;
  }

  .container {
    padding: 0 20px;
  }

  .breadcrumb {
    padding: 20px 0 16px;
    font-size: 13px;
  }

  .article-header {
    padding: 16px 0 28px;
    margin-bottom: 32px;
  }

  .article-header h1 {
    font-size: 26px;
    line-height: 1.35;
  }

  .article-meta {
    gap: 10px;
    margin-bottom: 14px;
  }

  .article-meta .info-item {
    font-size: 13px;
  }

  .article-content {
    font-size: 15px;
    line-height: 1.85;
  }

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

  .article-content h3 {
    font-size: 18px;
  }

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

  .cta-section {
    padding: 36px 24px;
    margin-top: 48px;
  }

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

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

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

  .footer-top {
    flex-direction: column;
    gap: 32px;
  }

  .footer-links {
    gap: 32px;
  }

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

  .back-top {
    bottom: 20px;
    right: 20px;
  }
}

@media (max-width: 520px) {
  .article-meta .info-item.hide-mobile {
    display: none;
  }

  .breadcrumb .current {
    max-width: 180px;
  }

  .related-bottom-links {
    display: flex;
    flex-direction: column;
    gap: 8px;
  }
}

/* ========== 打印优化 ========== */
@media print {
  .sidebar,
  .mobile-header,
  .mobile-menu,
  .back-top,
  .cta-section,
  .related-bottom-links {
    display: none !important;
  }

  .main-content {
    margin-left: 0;
  }

  .article-content {
    max-width: 100%;
    font-size: 14px;
  }

  body {
    background: #fff;
    color: #000;
  }
}

/* roulang page: category1 */
/* ===== 设计变量 ===== */
:root {
  --primary: #C6FF3E;
  --primary-hover: #D6FF6B;
  --primary-soft: rgba(198, 255, 62, 0.12);
  --bg: #0D0F12;
  --bg-card: #171B1F;
  --bg-sidebar: #101318;
  --bg-deep: #080A0C;
  --text: #F2F4F7;
  --text-muted: #9BA1A8;
  --text-soft: #6E747C;
  --border: rgba(255, 255, 255, 0.08);
  --border-strong: rgba(255, 255, 255, 0.14);
  --radius: 12px;
  --radius-sm: 8px;
  --shadow: 0 10px 40px rgba(0, 0, 0, 0.35);
  --shadow-hover: 0 16px 48px rgba(0, 0, 0, 0.5);
  --tr: 200ms ease-out;
  --sidebar-w: 240px;
  --gap: 96px;
}

/* ===== Reset & Base ===== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: 'PingFang SC', 'Microsoft YaHei', 'Noto Sans SC', -apple-system, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.75;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
button { font: inherit; cursor: pointer; background: none; border: none; }
h1, h2, h3, h4 { line-height: 1.3; font-weight: 700; }

/* ===== 布局骨架 ===== */
.layout { display: flex; min-height: 100vh; }
.main { flex: 1; margin-left: var(--sidebar-w); min-width: 0; }

.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 48px;
}
.container-narrow { max-width: 880px; }

/* ===== 侧边栏 ===== */
.sidebar {
  position: fixed;
  top: 0; left: 0; bottom: 0;
  width: var(--sidebar-w);
  background: var(--bg-sidebar);
  border-right: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  z-index: 100;
}
.sidebar-brand {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 28px 24px;
  border-bottom: 1px solid var(--border);
}
.brand-badge {
  width: 38px; height: 38px;
  display: flex; align-items: center; justify-content: center;
  background: var(--primary);
  color: #111;
  font-size: 19px; font-weight: 800;
  border-radius: 10px;
  flex-shrink: 0;
}
.brand-name {
  font-size: 16px;
  font-weight: 700;
  color: var(--text);
  letter-spacing: 0.3px;
  white-space: nowrap;
}
.sidebar-nav {
  flex: 1;
  padding: 20px 12px;
  display: flex;
  flex-direction: column;
  gap: 4px;
}
.nav-link {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 14px;
  border-radius: var(--radius-sm);
  color: var(--text-muted);
  font-size: 15px;
  font-weight: 500;
  position: relative;
  transition: color var(--tr), background var(--tr);
}
.nav-link:hover {
  color: var(--text);
  background: rgba(255, 255, 255, 0.04);
}
.nav-link.active {
  color: var(--primary);
  background: var(--primary-soft);
}
.nav-link.active::before {
  content: '';
  position: absolute;
  left: 0; top: 50%;
  transform: translateY(-50%);
  width: 3px; height: 20px;
  background: var(--primary);
  border-radius: 0 3px 3px 0;
}
.nav-icon {
  width: 28px; height: 28px;
  display: flex; align-items: center; justify-content: center;
  background: rgba(255, 255, 255, 0.06);
  border-radius: 7px;
  font-size: 13px;
  font-weight: 700;
  flex-shrink: 0;
}
.nav-link.active .nav-icon {
  background: var(--primary);
  color: #111;
}
.nav-link:focus-visible,
.sidebar-brand:focus-visible {
  outline: 2px solid var(--primary);
  outline-offset: 2px;
}
.sidebar-meta {
  padding: 20px 24px;
  border-top: 1px solid var(--border);
  font-size: 13px;
  color: var(--text-soft);
  line-height: 1.8;
}

/* ===== 移动端顶栏 ===== */
.mobile-header {
  display: none;
  position: sticky;
  top: 0;
  z-index: 90;
  height: 60px;
  align-items: center;
  justify-content: space-between;
  padding: 0 20px;
  background: rgba(13, 15, 18, 0.96);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--border);
}
.mobile-brand {
  font-size: 16px;
  font-weight: 700;
  color: var(--text);
}
.burger {
  width: 40px; height: 40px;
  display: flex; flex-direction: column;
  align-items: center; justify-content: center;
  gap: 5px;
  border-radius: var(--radius-sm);
}
.burger span {
  width: 20px; height: 2px;
  background: var(--text);
  border-radius: 2px;
  transition: background var(--tr);
}
.burger:hover span { background: var(--primary); }
.burger:focus-visible { outline: 2px solid var(--primary); outline-offset: 2px; }

/* ===== 移动端全屏菜单 ===== */
.mobile-menu {
  display: none;
  position: fixed;
  inset: 0;
  z-index: 200;
  background: var(--bg-deep);
  padding: 24px;
  flex-direction: column;
  opacity: 0;
  pointer-events: none;
  transition: opacity 300ms ease;
}
.mobile-menu.open {
  opacity: 1;
  pointer-events: auto;
}
.mobile-menu-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-bottom: 24px;
  border-bottom: 1px solid var(--border);
}
.mobile-menu-brand {
  font-size: 18px;
  font-weight: 700;
  color: var(--text);
}
.mobile-close {
  width: 40px; height: 40px;
  display: flex; align-items: center; justify-content: center;
  font-size: 28px;
  color: var(--text-muted);
  border-radius: var(--radius-sm);
  transition: color var(--tr), background var(--tr);
}
.mobile-close:hover { color: var(--primary); background: rgba(255,255,255,0.05); }
.mobile-nav {
  flex: 1;
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 32px;
}
.mobile-nav-link {
  font-size: 26px;
  font-weight: 700;
  color: var(--text-muted);
  padding: 8px 0;
  border-bottom: 1px solid var(--border);
  transition: color var(--tr), border-color var(--tr), padding-left var(--tr);
}
.mobile-nav-link:hover,
.mobile-nav-link.active {
  color: var(--primary);
  border-color: var(--primary);
  padding-left: 16px;
}
.mobile-nav-link:focus-visible {
  outline: 2px solid var(--primary);
  outline-offset: 4px;
}
.mobile-menu-foot {
  padding-top: 24px;
  border-top: 1px solid var(--border);
  font-size: 13px;
  color: var(--text-soft);
}

/* ===== 按钮 ===== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  height: 44px;
  padding: 0 24px;
  border-radius: var(--radius-sm);
  font-size: 15px;
  font-weight: 600;
  letter-spacing: 0.2px;
  transition: background var(--tr), color var(--tr), border-color var(--tr), transform var(--tr), box-shadow var(--tr);
  user-select: none;
}
.btn-lg { height: 56px; padding: 0 36px; font-size: 18px; }
.btn-sm { height: 32px; padding: 0 14px; font-size: 13px; }
.btn-primary {
  background: var(--primary);
  color: #0D0F12;
}
.btn-primary:hover {
  background: var(--primary-hover);
  transform: translateY(-2px);
  box-shadow: 0 12px 30px rgba(198, 255, 62, 0.25);
}
.btn-primary:active {
  transform: translateY(0);
  box-shadow: none;
}
.btn-ghost {
  background: transparent;
  color: var(--text);
  border: 1px solid rgba(255, 255, 255, 0.22);
}
.btn-ghost:hover {
  border-color: var(--primary);
  color: var(--primary);
  transform: translateY(-2px);
}
.btn-ghost:active {
  transform: translateY(0);
}
.btn:focus-visible {
  outline: 2px solid var(--primary);
  outline-offset: 3px;
}
.btn .arrow {
  transition: transform var(--tr);
}
.btn:hover .arrow { transform: translateX(3px); }

/* ===== 页面 Hero ===== */
.page-hero {
  position: relative;
  padding: 110px 0 90px;
  background-color: var(--bg-deep);
  overflow: hidden;
  border-bottom: 1px solid var(--border);
}
.hero-bg {
  position: absolute;
  inset: 0;
  background-size: cover;
  background-position: center;
  opacity: 0.45;
  z-index: 0;
}
.hero-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(8,10,12,0.55) 0%, rgba(13,15,18,0.92) 100%);
  z-index: 1;
}
.page-hero-inner {
  position: relative;
  z-index: 2;
}
.hero-eyebrow {
  display: inline-block;
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 2px;
  color: var(--primary);
  background: var(--primary-soft);
  border: 1px solid rgba(198, 255, 62, 0.2);
  border-radius: 4px;
  padding: 6px 14px;
  margin-bottom: 22px;
}
.page-hero h1 {
  font-size: 48px;
  font-weight: 800;
  letter-spacing: -1px;
  color: var(--text);
  margin-bottom: 18px;
}
.page-hero .hero-sub {
  font-size: 17px;
  color: var(--text-muted);
  max-width: 540px;
  margin-bottom: 34px;
  line-height: 1.8;
}
.hero-actions {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}

/* ===== 简介区 ===== */
.intro-section {
  padding: var(--gap) 0;
}
.intro-section h2 {
  font-size: 32px;
  font-weight: 700;
  margin-bottom: 16px;
  color: var(--text);
}
.intro-section .section-note {
  font-size: 14px;
  color: var(--text-soft);
  margin-bottom: 40px;
  letter-spacing: 1px;
}
.intro-section p {
  font-size: 16px;
  color: var(--text-muted);
  margin-bottom: 24px;
  line-height: 1.9;
}
.intro-section p:last-child { margin-bottom: 0; }
.intro-section .divider-line {
  width: 48px;
  height: 3px;
  background: var(--primary);
  border-radius: 3px;
  margin-bottom: 28px;
}

/* ===== 图文交错区 ===== */
.feature-group {
  padding: var(--gap) 0;
  background: var(--bg-deep);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}
.feature-group .group-title {
  text-align: center;
  max-width: 640px;
  margin: 0 auto 64px;
}
.feature-group .group-title h2 {
  font-size: 32px;
  font-weight: 700;
  margin-bottom: 14px;
}
.feature-group .group-title p {
  color: var(--text-muted);
  font-size: 16px;
}
.feature-item {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items: center;
  margin-bottom: 80px;
}
.feature-item:last-child { margin-bottom: 0; }
.feature-item.reverse .feature-media { order: 2; }
.feature-item.reverse .feature-content { order: 1; }
.feature-media {
  position: relative;
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid var(--border);
  box-shadow: var(--shadow);
}
.feature-media img {
  width: 100%;
  height: 320px;
  object-fit: cover;
  transition: transform 500ms ease, border-color var(--tr);
}
.feature-item:hover .feature-media img {
  transform: scale(1.03);
}
.feature-media::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, transparent 60%, rgba(8,10,12,0.6) 100%);
  pointer-events: none;
}
.feature-media-caption {
  position: absolute;
  left: 20px; bottom: 16px;
  z-index: 2;
  color: rgba(255,255,255,0.9);
  font-size: 13px;
  letter-spacing: 1px;
}
.feature-content .feature-num {
  font-size: 60px;
  font-weight: 800;
  color: var(--primary);
  line-height: 1;
  display: block;
  margin-bottom: 16px;
  opacity: 0.9;
}
.feature-content h3 {
  font-size: 24px;
  font-weight: 700;
  margin-bottom: 14px;
  color: var(--text);
}
.feature-content p {
  font-size: 15px;
  color: var(--text-muted);
  line-height: 1.9;
  margin-bottom: 20px;
}
.feature-content .feature-points {
  list-style: none;
  padding: 0;
}
.feature-content .feature-points li {
  position: relative;
  padding-left: 22px;
  font-size: 14px;
  color: var(--text-muted);
  margin-bottom: 8px;
}
.feature-content .feature-points li::before {
  content: '';
  position: absolute;
  left: 0; top: 9px;
  width: 7px; height: 7px;
  background: var(--primary);
  border-radius: 50%;
}

/* ===== 流程区 ===== */
.steps-section {
  padding: var(--gap) 0;
}
.steps-section .steps-heading {
  text-align: center;
  margin-bottom: 56px;
}
.steps-section .steps-heading h2 {
  font-size: 32px;
  font-weight: 700;
  margin-bottom: 14px;
}
.steps-section .steps-heading p {
  color: var(--text-muted);
  max-width: 560px;
  margin: 0 auto;
}
.steps-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}
.step-card {
  position: relative;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 32px 24px;
  transition: transform var(--tr), border-color var(--tr), box-shadow var(--tr);
}
.step-card:hover {
  transform: translateY(-4px);
  border-color: var(--border-strong);
  box-shadow: var(--shadow-hover);
}
.step-card .step-index {
  display: block;
  font-size: 18px;
  font-weight: 800;
  color: var(--primary);
  margin-bottom: 20px;
  letter-spacing: 1px;
}
.step-card .step-line {
  width: 32px;
  height: 2px;
  background: var(--primary);
  border-radius: 2px;
  margin-bottom: 18px;
  opacity: 0.6;
}
.step-card h3 {
  font-size: 18px;
  font-weight: 600;
  margin-bottom: 10px;
  color: var(--text);
}
.step-card p {
  font-size: 14px;
  color: var(--text-muted);
  line-height: 1.8;
}
.step-card:focus-within {
  outline: 2px solid var(--primary);
  outline-offset: 2px;
}

/* ===== FAQ 区 ===== */
.faq-section {
  padding: var(--gap) 0;
  background: var(--bg-deep);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}
.faq-section .faq-heading {
  text-align: center;
  margin-bottom: 48px;
}
.faq-section .faq-heading h2 {
  font-size: 32px;
  font-weight: 700;
  margin-bottom: 14px;
}
.faq-section .faq-heading p {
  color: var(--text-muted);
}
.faq-list {
  max-width: 800px;
  margin: 0 auto;
}
.faq-item {
  border-bottom: 1px solid var(--border);
}
.faq-item:first-child {
  border-top: 1px solid var(--border);
}
.faq-q {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  padding: 20px 8px;
  font-size: 17px;
  font-weight: 600;
  color: var(--text);
  text-align: left;
  position: relative;
  transition: color var(--tr);
}
.faq-q::before {
  content: '';
  position: absolute;
  left: -8px; top: 50%;
  transform: translateY(-50%);
  width: 3px; height: 0;
  background: var(--primary);
  border-radius: 3px;
  transition: height var(--tr);
}
.faq-item:hover .faq-q::before {
  height: 22px;
}
.faq-q:hover { color: var(--primary); }
.faq-q:focus-visible {
  outline: 2px solid var(--primary);
  outline-offset: -2px;
  border-radius: 4px;
}
.faq-icon {
  width: 28px; height: 28px;
  display: flex; align-items: center; justify-content: center;
  border-radius: 50%;
  background: rgba(255,255,255,0.06);
  font-size: 18px;
  color: var(--text-muted);
  flex-shrink: 0;
  transition: background var(--tr), color var(--tr), transform var(--tr);
}
.faq-item.open .faq-icon {
  background: var(--primary);
  color: #111;
  transform: rotate(45deg);
}
.faq-a {
  max-height: 0;
  overflow: hidden;
  transition: max-height 300ms ease;
}
.faq-a-inner {
  padding: 0 8px 24px;
  font-size: 15px;
  color: var(--text-muted);
  line-height: 1.85;
}

/* ===== CTA 区 ===== */
.cta-section {
  padding: var(--gap) 0;
  position: relative;
}
.cta-inner {
  background: var(--bg-card);
  border: 1px solid var(--border-strong);
  border-radius: 20px;
  padding: 64px 48px;
  text-align: center;
  position: relative;
  overflow: hidden;
}
.cta-inner::before {
  content: '';
  position: absolute;
  top: -80px; right: -80px;
  width: 240px; height: 240px;
  background: radial-gradient(circle, var(--primary-soft) 0%, transparent 70%);
  pointer-events: none;
}
.cta-inner h2 {
  font-size: 30px;
  font-weight: 800;
  margin-bottom: 14px;
  color: var(--text);
}
.cta-inner p {
  color: var(--text-muted);
  font-size: 16px;
  max-width: 520px;
  margin: 0 auto 32px;
  line-height: 1.8;
}
.cta-actions {
  display: flex;
  gap: 16px;
  justify-content: center;
  flex-wrap: wrap;
  position: relative;
  z-index: 2;
}

/* ===== 页脚 ===== */
.footer {
  background: var(--bg-deep);
  border-top: 1px solid var(--border);
  padding: 64px 0 32px;
}
.footer-top {
  display: flex;
  flex-wrap: wrap;
  gap: 48px;
  justify-content: space-between;
  margin-bottom: 48px;
}
.footer-brand h3 {
  font-size: 20px;
  font-weight: 700;
  margin-bottom: 12px;
  color: var(--text);
}
.footer-brand p {
  font-size: 14px;
  color: var(--text-muted);
  max-width: 280px;
  line-height: 1.8;
}
.footer-links {
  display: flex;
  gap: 64px;
  flex-wrap: wrap;
}
.footer-col h4 {
  font-size: 14px;
  font-weight: 600;
  color: var(--text-muted);
  margin-bottom: 16px;
  letter-spacing: 1px;
}
.footer-col a {
  display: block;
  font-size: 15px;
  color: var(--text);
  padding: 6px 0;
  transition: color var(--tr), padding-left var(--tr);
}
.footer-col a:hover {
  color: var(--primary);
  padding-left: 6px;
}
.footer-col a:focus-visible {
  outline: 2px solid var(--primary);
  outline-offset: 2px;
}
.footer-bottom {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  justify-content: space-between;
  border-top: 1px solid var(--border);
  padding-top: 24px;
  font-size: 13px;
  color: var(--text-soft);
}

/* ===== 响应式断点 ===== */
@media (max-width: 1199px) and (min-width: 768px) {
  :root { --sidebar-w: 72px; }
  .sidebar-brand { padding: 28px 17px; }
  .brand-name { display: none; }
  .sidebar-nav { padding: 20px 12px; }
  .nav-link { justify-content: center; padding: 12px 0; }
  .nav-text { display: none; }
  .sidebar-meta { padding: 20px 10px; text-align: center; }
  .sidebar-meta span { display: block; font-size: 11px; }
}

@media (max-width: 767px) {
  :root { --gap: 56px; }
  .layout { display: block; }
  .sidebar { display: none; }
  .main { margin-left: 0; }
  .mobile-header { display: flex; }
  .mobile-menu { display: flex; }
  .container { padding: 0 20px; }

  .page-hero { padding: 70px 0 56px; }
  .page-hero h1 { font-size: 30px; }
  .page-hero .hero-sub { font-size: 15px; }
  .hero-actions { flex-direction: column; }
  .hero-actions .btn { width: 100%; }

  .intro-section h2 { font-size: 26px; }
  .feature-group .group-title h2,
  .steps-section .steps-heading h2,
  .faq-section .faq-heading h2 { font-size: 26px; }

  .feature-item { grid-template-columns: 1fr; gap: 24px; margin-bottom: 48px; }
  .feature-item.reverse .feature-media { order: 0; }
  .feature-item.reverse .feature-content { order: 0; }
  .feature-media img { height: 220px; }
  .feature-content .feature-num { font-size: 44px; }

  .steps-grid { grid-template-columns: 1fr; gap: 16px; }
  .step-card { padding: 24px 20px; }

  .faq-q { font-size: 15px; padding: 18px 4px; }
  .cta-inner { padding: 40px 20px; }
  .cta-inner h2 { font-size: 24px; }
  .footer-top { flex-direction: column; gap: 32px; }
  .footer-links { flex-direction: column; gap: 24px; }
  .footer-bottom { flex-direction: column; text-align: center; justify-content: center; }
}

@media (max-width: 520px) {
  :root { --gap: 44px; }
  .page-hero h1 { font-size: 26px; }
  .feature-content h3 { font-size: 20px; }
  .cta-actions .btn { width: 100%; }
}

/* roulang page: category2 */
:root {
  --brand: #C6FF3E;
  --brand-hover: #D7FF70;
  --brand-dim: rgba(198, 255, 62, 0.1);
  --bg-deep: #090B0C;
  --bg: #0E1113;
  --bg-soft: #14181A;
  --card: #1A1E20;
  --line: rgba(255, 255, 255, 0.08);
  --line-strong: rgba(255, 255, 255, 0.16);
  --text: #F0F3ED;
  --text-strong: #FFFFFF;
  --muted: #99A29E;
  --muted-2: #6F7975;
  --radius: 12px;
  --radius-sm: 8px;
  --shadow: 0 10px 40px rgba(0, 0, 0, 0.45);
  --shadow-lg: 0 20px 60px rgba(0, 0, 0, 0.6);
  --transition: 200ms ease-out;
  --font-sans: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", sans-serif;
  --font-mono: "SF Mono", "JetBrains Mono", "Roboto Mono", Consolas, monospace;
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.8;
  color: var(--text);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
}

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

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

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

input,
textarea {
  font-family: inherit;
}

ul,
ol {
  list-style: none;
}

::selection {
  background: var(--brand);
  color: #000;
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 32px;
}

.main-wrapper {
  display: flex;
  min-height: 100vh;
}

.sidebar {
  position: fixed;
  top: 0;
  left: 0;
  bottom: 0;
  width: 240px;
  background: var(--bg-deep);
  border-right: 1px solid var(--line);
  padding: 36px 24px 28px;
  display: flex;
  flex-direction: column;
  z-index: 1000;
  overflow-y: auto;
}

.brand-logo {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 0 4px 32px;
  border-bottom: 1px solid var(--line);
  margin-bottom: 28px;
}

.brand-logo .logo-mark {
  width: 40px;
  height: 40px;
  border-radius: 10px;
  background: var(--brand);
  color: #000;
  font-weight: 800;
  font-size: 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.brand-logo .logo-text {
  font-size: 16px;
  font-weight: 800;
  color: var(--text-strong);
  letter-spacing: 0.5px;
  line-height: 1.4;
}

.sidebar-nav {
  display: flex;
  flex-direction: column;
  gap: 6px;
  flex: 1;
}

.sidebar-nav .nav-link {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 13px 16px;
  border-radius: var(--radius-sm);
  font-size: 15px;
  font-weight: 500;
  color: var(--muted);
  border-left: 3px solid transparent;
  transition: all var(--transition);
}

.sidebar-nav .nav-link .nav-icon {
  width: 32px;
  height: 32px;
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.06);
  color: var(--muted);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 14px;
  font-weight: 700;
  transition: all var(--transition);
}

.sidebar-nav .nav-link:hover {
  color: var(--text-strong);
  background: rgba(255, 255, 255, 0.03);
}

.sidebar-nav .nav-link:hover .nav-icon {
  background: var(--brand-dim);
  color: var(--brand);
}

.sidebar-nav .nav-link.active {
  color: var(--brand);
  background: var(--brand-dim);
  border-left-color: var(--brand);
}

.sidebar-nav .nav-link.active .nav-icon {
  background: var(--brand);
  color: #000;
}

.sidebar-foot {
  margin-top: auto;
  padding-top: 24px;
  border-top: 1px solid var(--line);
}

.sidebar-foot span {
  display: block;
  font-size: 12px;
  color: var(--muted-2);
  line-height: 1.6;
}

.main-content {
  flex: 1;
  margin-left: 240px;
  min-width: 0;
}

.mobile-header {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: 60px;
  background: rgba(9, 11, 12, 0.96);
  backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--line);
  align-items: center;
  justify-content: space-between;
  padding: 0 20px;
  z-index: 1100;
}

.mobile-header .m-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 800;
  font-size: 15px;
  color: var(--text-strong);
}

.mobile-header .m-logo .logo-mark {
  width: 32px;
  height: 32px;
  border-radius: 8px;
  background: var(--brand);
  color: #000;
  font-size: 13px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.menu-toggle {
  width: 44px;
  height: 44px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 5px;
  border-radius: 8px;
  transition: background var(--transition);
}

.menu-toggle:hover {
  background: rgba(255, 255, 255, 0.06);
}

.menu-toggle i {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--text);
  border-radius: 2px;
  transition: transform var(--transition), opacity var(--transition);
}

.menu-toggle.open i:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.menu-toggle.open i:nth-child(2) {
  opacity: 0;
}

.menu-toggle.open i:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

.mobile-overlay {
  display: none;
  position: fixed;
  top: 60px;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(9, 11, 12, 0.98);
  padding: 32px 24px;
  z-index: 1050;
  overflow-y: auto;
}

.mobile-overlay.show {
  display: block;
}

.mobile-overlay .nav-link {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 20px 0;
  font-size: 22px;
  font-weight: 700;
  color: var(--text);
  border-bottom: 1px solid var(--line);
}

.mobile-overlay .nav-link .nav-icon {
  width: 40px;
  height: 40px;
  border-radius: 10px;
  background: rgba(255, 255, 255, 0.06);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 16px;
}

.mobile-overlay .nav-link.active {
  color: var(--brand);
}

.main-content {
  background: var(--bg);
}

.page-hero {
  position: relative;
  min-height: 420px;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 100px 32px 80px;
  background-image: linear-gradient(rgba(6, 8, 9, 0.72), rgba(6, 8, 9, 0.72)), url('/assets/images/backpic/back-3.png');
  background-size: cover;
  background-position: center;
  text-align: center;
  overflow: hidden;
}

.page-hero::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: rgba(255, 255, 255, 0.05);
}

.page-hero::after {
  content: 'PLAY';
  position: absolute;
  right: -20px;
  bottom: -40px;
  font-size: 160px;
  font-weight: 900;
  font-family: var(--font-mono);
  color: rgba(255, 255, 255, 0.03);
  letter-spacing: -8px;
  line-height: 1;
  pointer-events: none;
  user-select: none;
}

.page-hero .hero-inner {
  position: relative;
  z-index: 2;
  max-width: 860px;
}

.page-hero .hero-tag {
  display: inline-block;
  padding: 6px 16px;
  background: var(--brand);
  color: #000;
  font-size: 13px;
  font-weight: 700;
  border-radius: 4px;
  letter-spacing: 0.5px;
  margin-bottom: 24px;
}

.page-hero h1 {
  font-size: 52px;
  font-weight: 800;
  color: var(--text-strong);
  line-height: 1.2;
  letter-spacing: 1px;
  margin-bottom: 20px;
}

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

.page-hero .hero-sub {
  font-size: 18px;
  color: var(--muted);
  max-width: 640px;
  margin: 0 auto 32px;
  line-height: 1.8;
}

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

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  height: 44px;
  padding: 0 28px;
  border-radius: var(--radius-sm);
  font-size: 15px;
  font-weight: 600;
  border: 1px solid transparent;
  transition: all var(--transition);
  line-height: 1;
}

.btn-lg {
  height: 56px;
  padding: 0 36px;
  font-size: 18px;
}

.btn-primary {
  background: var(--brand);
  color: #000;
}

.btn-primary:hover {
  background: var(--brand-hover);
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(198, 255, 62, 0.2);
}

.btn-primary:active {
  transform: translateY(0);
  box-shadow: none;
}

.btn-primary:focus-visible {
  outline: 3px solid rgba(198, 255, 62, 0.4);
  outline-offset: 2px;
}

.btn-outline {
  background: transparent;
  border-color: rgba(255, 255, 255, 0.2);
  color: var(--text);
}

.btn-outline:hover {
  border-color: var(--brand);
  color: var(--brand);
  transform: translateY(-2px);
}

.btn-outline:active {
  transform: translateY(0);
}

.btn-outline:focus-visible {
  outline: 3px solid rgba(198, 255, 62, 0.3);
  outline-offset: 2px;
}

.section {
  padding: 96px 0;
}

.section-title-wrap {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 24px;
  margin-bottom: 48px;
}

.section-title-wrap .sec-left {
  display: flex;
  align-items: baseline;
  gap: 20px;
}

.section-title-wrap .sec-title {
  font-size: 36px;
  font-weight: 800;
  color: var(--text-strong);
  line-height: 1.3;
}

.section-title-wrap .sec-en {
  font-size: 13px;
  font-family: var(--font-mono);
  color: var(--muted-2);
  letter-spacing: 2px;
  text-transform: uppercase;
}

.section-caption {
  color: var(--muted);
  font-size: 15px;
  max-width: 360px;
  text-align: right;
  line-height: 1.7;
}

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

.overview-card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 32px 28px;
  transition: all var(--transition);
  position: relative;
  overflow: hidden;
}

.overview-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: var(--brand);
  opacity: 0;
  transition: opacity var(--transition);
}

.overview-card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow);
  border-color: var(--line-strong);
}

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

.overview-card .card-no {
  font-family: var(--font-mono);
  font-size: 24px;
  font-weight: 700;
  color: var(--brand);
  margin-bottom: 12px;
}

.overview-card h3 {
  font-size: 20px;
  font-weight: 700;
  color: var(--text-strong);
  margin-bottom: 12px;
}

.overview-card p {
  font-size: 14px;
  color: var(--muted);
  line-height: 1.8;
}

.steps-section {
  background: var(--bg-deep);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.steps-list {
  display: flex;
  flex-direction: column;
  gap: 64px;
}

.step-item {
  display: grid;
  grid-template-columns: 140px 1fr 340px;
  gap: 48px;
  align-items: center;
}

.step-item .step-no {
  font-family: var(--font-mono);
  font-size: 48px;
  font-weight: 900;
  color: transparent;
  -webkit-text-stroke: 1px rgba(198, 255, 62, 0.5);
  line-height: 1;
  text-align: left;
}

.step-item .step-main .step-tag {
  display: inline-block;
  font-size: 12px;
  font-weight: 700;
  color: var(--brand);
  background: var(--brand-dim);
  padding: 4px 12px;
  border-radius: 4px;
  margin-bottom: 12px;
}

.step-item .step-main h3 {
  font-size: 24px;
  font-weight: 700;
  color: var(--text-strong);
  margin-bottom: 10px;
}

.step-item .step-main p {
  font-size: 15px;
  color: var(--muted);
  line-height: 1.9;
}

.step-item .step-media {
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--bg-soft);
  border: 1px solid var(--line);
}

.step-item .step-media img {
  width: 100%;
  height: 200px;
  object-fit: cover;
  transition: transform var(--transition);
}

.step-item .step-media:hover img {
  transform: scale(1.03);
}

.step-item .step-media .media-caption {
  padding: 12px 16px;
  font-size: 13px;
  color: var(--muted);
  background: var(--bg-soft);
  border-top: 1px solid var(--line);
}

.tips-section {
  padding: 80px 0;
}

.tips-card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  display: grid;
  grid-template-columns: 1fr 380px;
}

.tips-content {
  padding: 40px 48px;
}

.tips-content .tips-head {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 24px;
}

.tips-content .tips-head i {
  width: 36px;
  height: 36px;
  border-radius: 8px;
  background: var(--brand);
  color: #000;
  display: flex;
  align-items: center;
  justify-content: center;
  font-style: normal;
  font-weight: 800;
}

.tips-content .tips-head h3 {
  font-size: 22px;
  font-weight: 700;
  color: var(--text-strong);
}

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

.tips-list li {
  display: flex;
  gap: 12px;
  font-size: 14px;
  color: var(--muted);
  line-height: 1.7;
}

.tips-list li .dot {
  flex-shrink: 0;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--brand);
  margin-top: 10px;
}

.tips-media {
  position: relative;
  min-height: 260px;
}

.tips-media img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.tips-media::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(90deg, var(--card) 0%, transparent 30%);
}

.faq-section {
  background: var(--bg-deep);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.faq-list {
  max-width: 860px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

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

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

.faq-question {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  width: 100%;
  padding: 20px 28px;
  font-size: 17px;
  font-weight: 600;
  color: var(--text-strong);
  text-align: left;
  cursor: pointer;
  transition: background var(--transition);
  min-height: 54px;
}

.faq-question:hover {
  background: rgba(255, 255, 255, 0.02);
}

.faq-item:hover .faq-question {
  border-left: 2px solid var(--brand);
}

.faq-question .faq-icon {
  flex-shrink: 0;
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.06);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 16px;
  font-weight: 400;
  color: var(--muted);
  transition: all var(--transition);
}

.faq-item.open .faq-icon {
  background: var(--brand);
  color: #000;
  transform: rotate(45deg);
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 300ms ease;
}

.faq-answer-inner {
  padding: 0 28px 24px;
  font-size: 15px;
  color: var(--muted);
  line-height: 1.8;
  border-top: 1px solid transparent;
}

.faq-item.open .faq-answer-inner {
  border-top-color: var(--line);
  padding-top: 20px;
}

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

.cta-section {
  padding: 96px 0;
}

.cta-card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 72px 48px;
  text-align: center;
  position: relative;
  overflow: hidden;
}

.cta-card::before {
  content: '';
  position: absolute;
  top: -60px;
  right: -60px;
  width: 180px;
  height: 180px;
  border-radius: 50%;
  background: var(--brand);
  opacity: 0.05;
}

.cta-card::after {
  content: 'PLAY';
  position: absolute;
  left: 30px;
  bottom: 20px;
  font-family: var(--font-mono);
  font-size: 120px;
  font-weight: 900;
  color: rgba(255, 255, 255, 0.03);
  line-height: 1;
  pointer-events: none;
}

.cta-card h2 {
  font-size: 32px;
  font-weight: 800;
  color: var(--text-strong);
  margin-bottom: 12px;
  position: relative;
  z-index: 1;
}

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

.cta-card .cta-actions {
  display: flex;
  gap: 16px;
  justify-content: center;
  flex-wrap: wrap;
  position: relative;
  z-index: 1;
}

.cta-card .back-home {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 14px;
  color: var(--muted);
  transition: color var(--transition);
  margin-top: 24px;
  position: relative;
  z-index: 1;
}

.cta-card .back-home:hover {
  color: var(--brand);
}

.cta-card .back-home .arrow {
  transition: transform var(--transition);
}

.cta-card .back-home:hover .arrow {
  transform: translateX(-4px);
}

.footer {
  background: var(--bg-deep);
  border-top: 1px solid var(--line);
  padding: 64px 0 40px;
}

.footer-top {
  display: flex;
  justify-content: space-between;
  gap: 48px;
  flex-wrap: wrap;
  margin-bottom: 48px;
}

.footer-brand h3 {
  font-size: 22px;
  font-weight: 800;
  color: var(--text-strong);
  margin-bottom: 12px;
}

.footer-brand p {
  font-size: 14px;
  color: var(--muted);
  max-width: 360px;
  line-height: 1.8;
}

.footer-links {
  display: flex;
  gap: 64px;
}

.footer-col h4 {
  font-size: 15px;
  font-weight: 700;
  color: var(--text-strong);
  margin-bottom: 16px;
}

.footer-col a {
  display: block;
  font-size: 14px;
  color: var(--muted);
  padding: 4px 0;
  transition: color var(--transition);
}

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

.footer-bottom {
  border-top: 1px solid var(--line);
  padding-top: 24px;
  display: flex;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
  font-size: 13px;
  color: var(--muted-2);
}

@media (max-width: 1199px) {
  .sidebar {
    width: 72px;
    padding: 24px 12px;
  }

  .sidebar .brand-logo {
    justify-content: center;
    padding: 0 0 24px;
  }

  .sidebar .brand-logo .logo-text {
    display: none;
  }

  .sidebar-nav .nav-link {
    justify-content: center;
    padding: 12px 0;
    border-left: none;
    border-bottom: 2px solid transparent;
  }

  .sidebar-nav .nav-link .nav-text {
    display: none;
  }

  .sidebar-nav .nav-link.active {
    border-bottom-color: var(--brand);
  }

  .sidebar .sidebar-foot span {
    font-size: 10px;
    text-align: center;
    word-break: break-all;
  }

  .main-content {
    margin-left: 72px;
  }

  .step-item {
    grid-template-columns: 100px 1fr 280px;
    gap: 32px;
  }

  .tips-card {
    grid-template-columns: 1fr 300px;
  }
}

@media (max-width: 991px) {
  .page-hero {
    min-height: 380px;
    padding: 80px 24px 60px;
  }

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

  .guide-overview {
    grid-template-columns: 1fr;
    max-width: 560px;
    margin: 0 auto;
  }

  .step-item {
    grid-template-columns: 80px 1fr;
    row-gap: 16px;
  }

  .step-item .step-media {
    grid-column: 1 / -1;
    max-width: 520px;
    margin: 0 auto;
    width: 100%;
  }

  .tips-card {
    grid-template-columns: 1fr;
  }

  .tips-content {
    padding: 32px;
  }

  .tips-media {
    min-height: 220px;
  }

  .tips-media img {
    position: relative;
  }

  .tips-media::after {
    display: none;
  }

  .footer-top {
    flex-direction: column;
    gap: 32px;
  }
}

@media (max-width: 767px) {
  .sidebar {
    display: none;
  }

  .main-content {
    margin-left: 0;
  }

  .mobile-header {
    display: flex;
  }

  .mobile-overlay.show {
    display: block;
  }

  .main-content {
    padding-top: 0;
  }

  .page-hero {
    min-height: 65vh;
    padding: 100px 20px 60px;
  }

  .page-hero h1 {
    font-size: 30px;
    line-height: 1.3;
  }

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

  .hero-actions .btn {
    width: 100%;
    height: 48px;
  }

  .section {
    padding: 64px 0;
  }

  .container {
    padding: 0 20px;
  }

  .section-title-wrap {
    flex-direction: column;
    align-items: flex-start;
    gap: 12px;
    margin-bottom: 32px;
  }

  .section-title-wrap .sec-title {
    font-size: 28px;
  }

  .section-caption {
    text-align: left;
    font-size: 14px;
  }

  .btn-lg {
    height: 56px;
    font-size: 17px;
  }

  .steps-list {
    gap: 48px;
  }

  .step-item {
    grid-template-columns: 1fr;
    gap: 12px;
  }

  .step-item .step-no {
    font-size: 36px;
  }

  .step-item .step-main h3 {
    font-size: 20px;
  }

  .step-item .step-main p {
    font-size: 14px;
  }

  .step-item .step-media {
    grid-column: auto;
    max-width: none;
  }

  .tips-content {
    padding: 28px 20px;
  }

  .tips-content .tips-head h3 {
    font-size: 19px;
  }

  .faq-question {
    padding: 18px 20px;
    font-size: 15px;
  }

  .faq-answer-inner {
    padding: 0 20px 20px;
    font-size: 14px;
  }

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

  .cta-card {
    padding: 48px 24px;
  }

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

  .cta-card p {
    font-size: 15px;
  }

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

  .footer {
    padding: 48px 0 32px;
  }

  .footer-top {
    gap: 24px;
  }

  .footer-links {
    flex-wrap: wrap;
    gap: 24px;
  }

  .footer-col {
    min-width: 120px;
  }

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