/* roulang page: index */
:root {
  --primary: #00D4FF;
  --primary-dark: #007BFF;
  --primary-hover: #00B8E0;
  --amber: #F5B50A;
  --amber-hover: #FF8A00;
  --coral: #FF5A5E;
  --bg-dark: #050A1A;
  --bg-section: #0A1228;
  --bg-card: #0E1B33;
  --text-main: #E8F0F8;
  --text-secondary: #8CA3B8;
  --text-muted: #5A7184;
  --glass-bg: rgba(255,255,255,0.04);
  --glass-border: rgba(0,212,255,0.15);
  --radius-lg: 16px;
  --radius-md: 10px;
  --radius-sm: 8px;
  --radius-pill: 999px;
  --shadow-card: 0 8px 32px rgba(0,0,0,0.35);
  --glow-cyan: 0 0 20px rgba(0,212,255,0.35);
  --glow-amber: 0 0 16px rgba(245,181,10,0.3);
  --transition-base: all 0.3s ease;
}
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: system-ui, -apple-system, "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
  background: var(--bg-dark);
  color: var(--text-main);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}
body::before {
  content: '';
  position: fixed;
  top: -10%;
  left: -8%;
  width: 55vw;
  height: 55vw;
  background: radial-gradient(circle, rgba(0,212,255,0.08) 0%, transparent 70%);
  pointer-events: none;
  z-index: 0;
}
body::after {
  content: '';
  position: fixed;
  bottom: -12%;
  right: -6%;
  width: 48vw;
  height: 48vw;
  background: radial-gradient(circle, rgba(245,181,10,0.05) 0%, transparent 70%);
  pointer-events: none;
  z-index: 0;
}
.container { position: relative; z-index: 1; max-width: 1200px; }
a { text-decoration: none; color: inherit; transition: var(--transition-base); }
img { max-width: 100%; }
button { font-family: inherit; }

/* ===== Navigation ===== */
.roulang-nav {
  background: rgba(5, 10, 26, 0.85);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  min-height: 72px;
  padding: 10px 0;
  border-bottom: 1px solid rgba(0,212,255,0.08);
  transition: all 0.3s ease;
  z-index: 1030;
}
.roulang-nav.scrolled {
  background: rgba(5, 10, 26, 0.96);
  box-shadow: 0 4px 32px rgba(0,0,0,0.45);
  border-bottom-color: rgba(0,212,255,0.18);
}
.roulang-nav .navbar-brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--text-main);
  letter-spacing: 0.3px;
}
.roulang-nav .navbar-brand .brand-icon {
  width: 36px;
  height: 36px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
  border-radius: 10px;
  color: #fff;
  font-size: 0.95rem;
  box-shadow: var(--glow-cyan);
}
.roulang-nav .navbar-brand .brand-highlight {
  background: linear-gradient(135deg, var(--primary) 0%, #fff 100%);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}
.roulang-nav .navbar-nav { gap: 4px; }
.roulang-nav .nav-link {
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--text-secondary);
  padding: 10px 18px;
  border-radius: var(--radius-sm);
  position: relative;
  transition: var(--transition-base);
}
.roulang-nav .nav-link::after {
  content: '';
  position: absolute;
  left: 18px;
  right: 18px;
  bottom: 4px;
  height: 2px;
  background: linear-gradient(90deg, var(--primary), transparent);
  border-radius: 2px;
  opacity: 0;
  transform: scaleX(0.4);
  transition: var(--transition-base);
}
.roulang-nav .nav-link:hover {
  color: #fff;
}
.roulang-nav .nav-link:hover::after {
  opacity: 1;
  transform: scaleX(1);
}
.roulang-nav .nav-link.active {
  color: #fff;
}
.roulang-nav .nav-link.active::after {
  opacity: 1;
  transform: scaleX(1);
  box-shadow: 0 0 12px rgba(0,212,255,0.5);
}
.btn-nav-cta {
  margin-left: 16px;
  padding: 10px 26px;
  border-radius: var(--radius-md);
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
  border: none;
  color: #fff !important;
  font-weight: 600;
  font-size: 0.95rem;
  box-shadow: var(--glow-cyan);
  transition: var(--transition-base);
}
.btn-nav-cta:hover {
  transform: translateY(-2px);
  box-shadow: 0 0 32px rgba(0,212,255,0.55);
}
.navbar-toggler {
  border: 1px solid rgba(0,212,255,0.4);
  border-radius: 8px;
  padding: 6px 10px;
  background: transparent;
}
.navbar-toggler:focus { box-shadow: 0 0 0 3px rgba(0,212,255,0.25); outline: none; }
.navbar-toggler .navbar-toggler-icon {
  background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 30 30'%3e%3cpath stroke='rgba(0,212,255,0.85)' stroke-linecap='round' stroke-miterlimit='10' stroke-width='2' d='M4 7h22M4 15h22M4 23h22'/%3e%3c/svg%3e");
}
.navbar-collapse {
  background: transparent;
}
@media (max-width: 991.98px) {
  .navbar-collapse {
    background: var(--bg-section);
    border-radius: 16px;
    padding: 16px;
    margin-top: 12px;
    border: 1px solid rgba(0,212,255,0.15);
  }
  .btn-nav-cta { margin-left: 0; margin-top: 12px; width: 100%; text-align: center; }
}

/* ===== Countdown Bar ===== */
.countdown-bar {
  background: rgba(10, 18, 40, 0.92);
  border-bottom: 1px solid rgba(0,212,255,0.2);
  border-top: 1px solid rgba(0,212,255,0.1);
  padding: 12px 0;
  position: relative;
  z-index: 1020;
}
.countdown-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
}
.countdown-label {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-size: 0.95rem;
  font-weight: 600;
  color: #fff;
  letter-spacing: 0.5px;
  white-space: nowrap;
}
.pulse-dot {
  width: 8px;
  height: 8px;
  background: var(--coral);
  border-radius: 50%;
  display: inline-block;
  animation: pulse 1.5s infinite ease-in-out;
}
@keyframes pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.4; transform: scale(0.75); }
}
.countdown-timer {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
}
.time-box {
  background: var(--bg-card);
  border-radius: 12px;
  padding: 4px 14px;
  display: flex;
  align-items: center;
  gap: 6px;
  border: 1px solid rgba(0,212,255,0.15);
  min-width: 68px;
  justify-content: center;
}
.time-num {
  font-family: "DIN Alternate", "Roboto Mono", monospace;
  font-size: 1.4rem;
  font-weight: 700;
  background: linear-gradient(135deg, var(--amber) 0%, var(--amber-hover) 100%);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}
.time-unit {
  font-size: 0.75rem;
  color: var(--text-secondary);
  font-weight: 500;
}
.btn-amber {
  background: linear-gradient(135deg, var(--amber) 0%, var(--amber-hover) 100%);
  color: #1a1200 !important;
  font-weight: 700;
  border: none;
  border-radius: var(--radius-md);
  padding: 10px 24px;
  font-size: 0.9rem;
  box-shadow: var(--glow-amber);
  transition: var(--transition-base);
  white-space: nowrap;
}
.btn-amber:hover {
  transform: translateY(-2px);
  box-shadow: 0 0 24px rgba(245,181,10,0.5);
}
@media (max-width: 767.98px) {
  .countdown-inner { flex-direction: column; align-items: flex-start; }
  .countdown-timer { flex-wrap: nowrap; overflow-x: auto; width: 100%; padding-bottom: 4px; }
  .time-box { min-width: 58px; padding: 3px 8px; }
  .time-num { font-size: 1.1rem; }
  .btn-amber { width: 100%; text-align: center; }
}

/* ===== Hero ===== */
.hero-section {
  position: relative;
  padding: 80px 0 100px;
  background:
    linear-gradient(rgba(5,10,26,0.82), rgba(5,10,26,0.92)),
    url('/assets/images/backpic/back-1.png') center/cover no-repeat;
  border-bottom: 1px solid rgba(0,212,255,0.12);
  overflow: hidden;
}
.hero-section::before {
  content: '';
  position: absolute;
  inset: 0;
  background:
    repeating-linear-gradient(45deg, transparent, transparent 12px, rgba(255,255,255,0.015) 12px, rgba(255,255,255,0.015) 13px);
  pointer-events: none;
}
.hero-section::after {
  content: '';
  position: absolute;
  top: -20%;
  right: -10%;
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, rgba(0,212,255,0.1) 0%, transparent 65%);
  pointer-events: none;
}
.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: linear-gradient(135deg, var(--amber), var(--amber-hover));
  color: #1a1200;
  font-size: 0.82rem;
  font-weight: 700;
  padding: 6px 16px;
  border-radius: 999px;
  margin-bottom: 20px;
  box-shadow: var(--glow-amber);
}
.blink-dot {
  width: 6px;
  height: 6px;
  background: #1a1200;
  border-radius: 50%;
  animation: pulse 1.2s infinite;
}
.hero-title {
  font-size: clamp(1.8rem, 3.5vw, 2.6rem);
  font-weight: 700;
  line-height: 1.3;
  color: #fff;
  margin-bottom: 16px;
  letter-spacing: 0.5px;
}
.grad-text {
  background: linear-gradient(135deg, var(--primary) 0%, #ffffff 100%);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}
.hero-subtitle {
  font-size: 1rem;
  color: var(--text-secondary);
  line-height: 1.7;
  max-width: 520px;
  margin-bottom: 32px;
}
.hero-actions {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}
.btn-primary-glow {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
  color: #fff !important;
  border: none;
  border-radius: var(--radius-md);
  padding: 13px 32px;
  font-size: 1rem;
  font-weight: 600;
  box-shadow: var(--glow-cyan);
  transition: var(--transition-base);
  min-width: 130px;
}
.btn-primary-glow:hover {
  transform: translateY(-2px) scale(1.02);
  box-shadow: 0 0 32px rgba(0,212,255,0.55);
}
.btn-primary-glow:active { transform: translateY(1px); }
.btn-outline-cyan {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  background: transparent;
  color: var(--primary) !important;
  border: 1px solid var(--primary);
  border-radius: var(--radius-md);
  padding: 12px 28px;
  font-size: 1rem;
  font-weight: 500;
  transition: var(--transition-base);
  min-width: 120px;
}
.btn-outline-cyan:hover {
  background: rgba(0,212,255,0.1);
  box-shadow: 0 0 16px rgba(0,212,255,0.25);
}
.btn-outline-cyan:focus-visible {
  outline: 2px dashed var(--primary);
  outline-offset: 3px;
}
.hero-visual {
  position: relative;
  display: flex;
  justify-content: center;
  align-items: center;
}
.hero-card {
  position: relative;
  width: min(100%, 420px);
  aspect-ratio: 4/3;
  border-radius: 24px;
  overflow: hidden;
  border: 1px solid rgba(0,212,255,0.25);
  box-shadow: 0 0 48px rgba(0,212,255,0.15), var(--shadow-card);
  background: var(--bg-card);
  clip-path: polygon(0 0, calc(100% - 24px) 0, 100% 24px, 100% 100%, 24px 100%, 0 calc(100% - 24px));
}
.hero-card img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}
.hero-card::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, transparent 55%, rgba(5,10,26,0.65) 100%);
}
.hero-ribbon {
  position: absolute;
  top: 16px;
  left: 16px;
  z-index: 2;
  background: linear-gradient(135deg, var(--amber), var(--amber-hover));
  color: #1a1200;
  font-size: 0.78rem;
  font-weight: 700;
  padding: 5px 14px;
  border-radius: 999px;
  box-shadow: var(--glow-amber);
}
.scroll-hint {
  position: absolute;
  bottom: 24px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
  color: var(--text-muted);
  font-size: 0.8rem;
  letter-spacing: 1px;
  z-index: 2;
}
.scroll-hint i {
  animation: bounceDown 2s infinite ease-in-out;
}
@keyframes bounceDown {
  0%, 100% { transform: translateY(0); opacity: 0.6; }
  50% { transform: translateY(6px); opacity: 1; }
}
@media (max-width: 991.98px) {
  .hero-section { padding: 60px 0 64px; text-align: center; }
  .hero-subtitle { margin-left: auto; margin-right: auto; }
  .hero-actions { justify-content: center; }
  .hero-visual { margin-top: 40px; }
  .scroll-hint { display: none; }
}

/* ===== Section Global ===== */
.section-pad { padding: 80px 0; }
.section-head { margin-bottom: 48px; }
.section-head h2 {
  font-size: 1.6rem;
  font-weight: 700;
  color: var(--text-main);
  position: relative;
  padding-left: 16px;
  margin-bottom: 8px;
}
.section-head h2::before {
  content: '';
  position: absolute;
  left: 0;
  top: 50%;
  transform: translateY(-50%);
  width: 4px;
  height: 26px;
  background: var(--primary);
  border-radius: 4px;
  box-shadow: var(--glow-cyan);
}
.section-head p {
  color: var(--text-secondary);
  font-size: 0.95rem;
  margin: 0;
  padding-left: 16px;
}
.section-eyebrow {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 3px;
  color: var(--primary);
  text-transform: uppercase;
  margin-bottom: 8px;
}
.section-head.text-center h2 { padding-left: 0; }
.section-head.text-center h2::before { display: none; }
.section-head.text-center p { padding-left: 0; }
@media (max-width: 767.98px) {
  .section-pad { padding: 48px 0; }
  .section-head { margin-bottom: 32px; }
}

/* ===== Features ===== */
.features-section {
  background: var(--bg-dark);
  padding: 80px 0;
}
.feature-card {
  background: var(--glass-bg);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-lg);
  padding: 24px;
  position: relative;
  overflow: hidden;
  transition: var(--transition-base);
  box-shadow: var(--shadow-card), inset 0 1px 0 rgba(255,255,255,0.06);
  height: 100%;
}
.feature-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 60px;
  height: 2px;
  background: linear-gradient(90deg, var(--primary), transparent);
  border-radius: 2px;
}
.feature-card:hover {
  transform: translateY(-4px);
  border-color: rgba(0,212,255,0.35);
  box-shadow: 0 12px 40px rgba(0,0,0,0.45), 0 0 24px rgba(0,212,255,0.12), inset 0 1px 0 rgba(255,255,255,0.1);
}
.feature-icon {
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: rgba(0,212,255,0.1);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.2rem;
  color: var(--primary);
  margin-bottom: 18px;
  border: 1px solid rgba(0,212,255,0.2);
  transition: var(--transition-base);
}
.feature-card:nth-child(1) .feature-icon {
  color: var(--amber);
  background: rgba(245,181,10,0.1);
  border-color: rgba(245,181,10,0.25);
}
.feature-card:hover .feature-icon {
  filter: drop-shadow(0 0 8px rgba(0,212,255,0.5));
}
.feature-card h3 {
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--text-main);
  margin-bottom: 10px;
}
.feature-card p {
  font-size: 0.85rem;
  color: var(--text-secondary);
  line-height: 1.65;
  margin: 0;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
@media (max-width: 767.98px) {
  .feature-card { backdrop-filter: none; -webkit-backdrop-filter: none; background: rgba(255,255,255,0.06); }
}

/* ===== Showcase Grid ===== */
.showcase-section {
  background: var(--bg-section);
  padding: 80px 0;
  border-top: 1px solid rgba(255,255,255,0.04);
  border-bottom: 1px solid rgba(255,255,255,0.04);
}
.showcase-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}
.showcase-item {
  position: relative;
  border-radius: var(--radius-lg);
  overflow: hidden;
  aspect-ratio: 4/3;
  background: var(--bg-card);
  cursor: pointer;
  box-shadow: var(--shadow-card);
  transition: var(--transition-base);
  border: 1px solid rgba(255,255,255,0.06);
}
.showcase-item img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.5s ease;
  display: block;
}
.showcase-item:hover img { transform: scale(1.04); }
.showcase-item:hover {
  border-color: rgba(0,212,255,0.25);
  box-shadow: 0 12px 40px rgba(0,0,0,0.45), 0 0 24px rgba(0,212,255,0.1);
}
.showcase-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, transparent 50%, rgba(5,10,26,0.85) 100%);
  display: flex;
  align-items: flex-end;
  padding: 16px;
}
.showcase-overlay span {
  color: #fff;
  font-size: 0.9rem;
  font-weight: 600;
  letter-spacing: 0.3px;
  text-shadow: 0 2px 8px rgba(0,0,0,0.6);
}
.showcase-grid .showcase-large {
  grid-column: span 2;
  aspect-ratio: 16/7;
}
@media (max-width: 991.98px) {
  .showcase-grid { grid-template-columns: repeat(2, 1fr); }
  .showcase-grid .showcase-large { grid-column: span 2; }
}
@media (max-width: 575.98px) {
  .showcase-grid { grid-template-columns: repeat(2, 1fr); gap: 10px; }
  .showcase-overlay span { font-size: 0.75rem; }
}

/* ===== CTA ===== */
.cta-section {
  position: relative;
  padding: 96px 0;
  background: linear-gradient(135deg, #0A1228 0%, #0E3A5C 50%, #0A1228 100%);
  overflow: hidden;
  text-align: center;
}
.cta-section::before {
  content: '';
  position: absolute;
  top: -40%;
  left: 50%;
  transform: translateX(-50%);
  width: 700px;
  height: 700px;
  background: radial-gradient(circle, rgba(0,212,255,0.12) 0%, transparent 65%);
  pointer-events: none;
}
.cta-section::after {
  content: '';
  position: absolute;
  top: 0;
  left: -30%;
  width: 60%;
  height: 100%;
  background: linear-gradient(105deg, transparent 40%, rgba(255,255,255,0.08) 50%, transparent 60%);
  animation: ctashine 4s infinite ease-in-out;
  transform: skewX(-15deg);
  pointer-events: none;
}
@keyframes ctashine {
  0% { left: -30%; }
  50% { left: 80%; }
  100% { left: -30%; }
}
.cta-section .container { position: relative; z-index: 2; }
.cta-section h2 {
  font-size: clamp(1.6rem, 3vw, 2.2rem);
  font-weight: 700;
  color: #fff;
  margin-bottom: 12px;
}
.cta-section p {
  font-size: 1rem;
  color: var(--text-secondary);
  max-width: 560px;
  margin: 0 auto 36px;
  line-height: 1.8;
}
.btn-xl {
  padding: 16px 48px;
  font-size: 1.2rem;
  border-radius: 12px;
}
.btn-amber-glow {
  background: linear-gradient(135deg, var(--amber) 0%, var(--amber-hover) 100%);
  color: #1a1200 !important;
  font-weight: 700;
  border: none;
  box-shadow: 0 0 36px rgba(245,181,10,0.4);
  transition: var(--transition-base);
  display: inline-block;
}
.btn-amber-glow:hover {
  transform: translateY(-3px) scale(1.02);
  box-shadow: 0 0 56px rgba(245,181,10,0.6);
}
.cta-gear {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(255,255,255,0.08);
  border: 1px solid rgba(255,255,255,0.12);
  border-radius: 999px;
  padding: 6px 18px;
  font-size: 0.82rem;
  color: var(--text-secondary);
  margin-top: 24px;
}
.gear-dot {
  width: 6px;
  height: 6px;
  background: var(--primary);
  border-radius: 50%;
  box-shadow: var(--glow-cyan);
}
@media (max-width: 767.98px) {
  .cta-section { padding: 56px 0; }
  .btn-xl { width: 100%; text-align: center; }
}

/* ===== FAQ ===== */
.faq-section {
  background: var(--bg-dark);
  padding: 80px 0;
}
.accordion {
  max-width: 860px;
  margin: 0 auto;
}
.accordion-item {
  background: var(--glass-bg);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid var(--glass-border) !important;
  border-radius: 12px !important;
  margin-bottom: 12px;
  overflow: hidden;
  transition: var(--transition-base);
}
.accordion-item:hover {
  border-color: rgba(0,212,255,0.3) !important;
}
.accordion-button {
  background: transparent !important;
  color: var(--text-main) !important;
  font-size: 1rem;
  font-weight: 600;
  padding: 18px 20px;
  display: flex;
  align-items: center;
  gap: 12px;
  transition: var(--transition-base);
  box-shadow: none !important;
}
.accordion-button:not(.collapsed) {
  background: transparent !important;
  color: #fff !important;
}
.accordion-button:focus {
  box-shadow: none !important;
  outline: 2px dashed var(--primary);
  outline-offset: -2px;
}
.accordion-button::after {
  display: none !important;
}
.accordion-button .q-icon {
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background: var(--primary);
  color: #06121f;
  font-size: 0.78rem;
  font-weight: 700;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  box-shadow: var(--glow-cyan);
}
.accordion-button .arrow-icon {
  margin-left: auto;
  font-size: 1rem;
  color: var(--primary);
  transition: transform 0.3s ease;
}
.accordion-button:not(.collapsed) .arrow-icon {
  transform: rotate(45deg);
}
.accordion-body {
  padding: 4px 20px 20px 60px;
  color: var(--text-secondary);
  font-size: 0.9rem;
  line-height: 1.7;
  border-left: 3px solid var(--amber);
  margin-left: 48px;
  margin-bottom: 18px;
  border-radius: 0 0 0 8px;
}
.faq-more {
  text-align: center;
  margin-top: 28px;
}
.faq-more a {
  color: var(--primary);
  font-weight: 500;
  display: inline-flex;
  align-items: center;
  gap: 6px;
}
.faq-more a:hover { color: #fff; }
@media (max-width: 575.98px) {
  .accordion-body { padding-left: 14px; margin-left: 0; }
  .accordion-button { font-size: 0.9rem; padding: 14px; }
}

/* ===== News List ===== */
.news-section {
  background: var(--bg-section);
  padding: 80px 0;
  border-top: 1px solid rgba(255,255,255,0.04);
}
.news-list {
  display: flex;
  flex-direction: column;
  gap: 16px;
  max-width: 960px;
  margin: 0 auto;
}
.news-card {
  display: flex;
  align-items: center;
  gap: 20px;
  background: var(--glass-bg);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid var(--glass-border);
  border-radius: 14px;
  padding: 16px;
  transition: var(--transition-base);
  position: relative;
  overflow: hidden;
}
.news-card:hover {
  border-color: rgba(0,212,255,0.35);
  background: rgba(255,255,255,0.07);
  box-shadow: 0 8px 32px rgba(0,0,0,0.35), 0 0 20px rgba(0,212,255,0.08);
}
.news-card::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 3px;
  background: linear-gradient(180deg, var(--primary), transparent);
  opacity: 0;
  transition: var(--transition-base);
}
.news-card:hover::before { opacity: 1; }
.news-thumb {
  flex-shrink: 0;
  width: 160px;
  height: 100px;
  border-radius: 8px;
  overflow: hidden;
  background: var(--bg-card);
}
.news-thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.4s ease;
}
.news-card:hover .news-thumb img { transform: scale(1.05); }
.news-body {
  flex: 1;
  min-width: 0;
}
.news-meta {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 6px;
  flex-wrap: wrap;
}
.news-badge {
  display: inline-block;
  background: rgba(0,212,255,0.12);
  border: 1px solid rgba(0,212,255,0.3);
  color: var(--primary);
  font-size: 0.72rem;
  font-weight: 600;
  padding: 2px 12px;
  border-radius: 999px;
  white-space: nowrap;
}
.news-date {
  font-size: 0.78rem;
  color: var(--text-muted);
  white-space: nowrap;
}
.news-date i { margin-right: 4px; }
.news-body h3 {
  font-size: 1rem;
  font-weight: 600;
  color: var(--text-main);
  margin: 0 0 6px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  transition: var(--transition-base);
}
.news-card:hover .news-body h3 { color: var(--primary); }
.news-body p {
  font-size: 0.85rem;
  color: var(--text-secondary);
  margin: 0;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  line-height: 1.6;
}
.news-arrow {
  flex-shrink: 0;
  width: 40px;
  height: 40px;
  border-radius: 50%;
  border: 1px solid rgba(0,212,255,0.3);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--primary);
  font-size: 0.9rem;
  transition: var(--transition-base);
}
.news-card:hover .news-arrow {
  background: rgba(0,212,255,0.1);
  transform: translateX(4px);
}
.empty-state {
  text-align: center;
  padding: 48px 24px;
  background: var(--glass-bg);
  border: 1px dashed rgba(0,212,255,0.25);
  border-radius: var(--radius-lg);
  color: var(--text-muted);
}
.empty-state i {
  font-size: 2.4rem;
  margin-bottom: 12px;
  opacity: 0.5;
  display: block;
}
.empty-state p { margin: 0; font-size: 0.95rem; }
.view-all {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  color: var(--primary) !important;
  font-weight: 500;
  font-size: 0.9rem;
  white-space: nowrap;
  padding: 8px 16px;
  border: 1px solid rgba(0,212,255,0.3);
  border-radius: 999px;
  transition: var(--transition-base);
  background: rgba(0,212,255,0.05);
}
.view-all:hover {
  background: rgba(0,212,255,0.12);
  box-shadow: 0 0 16px rgba(0,212,255,0.15);
  transform: translateX(2px);
}
@media (max-width: 767.98px) {
  .news-card { flex-wrap: wrap; padding: 12px; gap: 12px; }
  .news-thumb { width: 80px; height: 60px; }
  .news-arrow { display: none; }
  .news-body h3 { white-space: normal; -webkit-line-clamp: 2; display: -webkit-box; -webkit-box-orient: vertical; }
}

/* ===== Footer ===== */
.site-footer {
  background: #04070F;
  border-top: 2px solid transparent;
  border-image: linear-gradient(90deg, var(--primary), transparent 40%, transparent 60%, var(--primary)) 1;
  padding: 64px 0 32px;
  position: relative;
  z-index: 1;
}
.site-footer h4 {
  color: var(--text-main);
  font-size: 1rem;
  font-weight: 600;
  margin-bottom: 20px;
}
.footer-brand .footer-logo {
  font-size: 1.3rem;
  font-weight: 700;
  color: #fff;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 14px;
}
.footer-brand .footer-logo span {
  color: var(--primary);
}
.footer-brand p {
  font-size: 0.85rem;
  color: var(--text-muted);
  line-height: 1.8;
  margin-bottom: 18px;
  max-width: 340px;
}
.social-icons {
  display: flex;
  gap: 10px;
}
.social-icons a {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: rgba(255,255,255,0.06);
  border: 1px solid rgba(255,255,255,0.1);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-secondary);
  font-size: 0.85rem;
  transition: var(--transition-base);
}
.social-icons a:hover {
  background: var(--primary);
  color: #06121f;
  border-color: var(--primary);
  transform: translateY(-3px);
}
.footer-links {
  list-style: none;
  padding: 0;
  margin: 0;
}
.footer-links li { margin-bottom: 12px; }
.footer-links a {
  color: var(--text-muted);
  font-size: 0.88rem;
  transition: var(--transition-base);
  display: inline-flex;
  align-items: center;
  gap: 6px;
}
.footer-links a:hover {
  color: var(--primary);
  transform: translateX(4px);
}
.footer-links a i {
  font-size: 0.6rem;
  color: var(--primary);
}
.footer-copy {
  font-size: 0.82rem;
  color: var(--text-muted);
  margin: 0 0 10px;
}
.footer-disclaimer {
  font-size: 0.78rem;
  color: rgba(90,113,132,0.7);
  line-height: 1.6;
  max-width: 400px;
  margin: 0;
}
.footer-divider {
  border-top: 1px solid rgba(255,255,255,0.06);
  margin: 40px 0 24px;
}
.footer-bottom {
  text-align: center;
  color: rgba(90,113,132,0.6);
  font-size: 0.75rem;
}
@media (max-width: 767.98px) {
  .site-footer { padding: 48px 0 24px; }
  .footer-brand p { max-width: 100%; }
}

/* ===== Utilities ===== */
.btn:focus-visible, a:focus-visible {
  outline: 2px dashed var(--primary);
  outline-offset: 3px;
}
.text-primary-cyan { color: var(--primary) !important; }
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation-duration: 0.01ms !important; transition-duration: 0.01ms !important; }
}

/* roulang page: category1 */
:root {
  --primary-bg: #050A1A;
  --secondary-bg: #0A1228;
  --card-bg: #0E1B33;
  --accent-cyan: #00D4FF;
  --accent-cyan-hover: #00B8E0;
  --accent-gold: #F5B50A;
  --accent-red: #FF5A5E;
  --text-white: #E8F0F8;
  --text-secondary: #8CA3B8;
  --text-muted: #5A7184;
  --glass-bg: rgba(255, 255, 255, 0.04);
  --glass-border: rgba(0, 212, 255, 0.15);
  --glass-border-hover: rgba(0, 212, 255, 0.35);
  --radius-card: 16px;
  --radius-btn: 10px;
  --radius-badge: 999px;
  --radius-thumb: 8px;
  --shadow-card: 0 8px 32px rgba(0, 0, 0, 0.35);
  --shadow-glow: 0 0 20px rgba(0, 212, 255, 0.35);
  --shadow-gold: 0 0 16px rgba(245, 181, 10, 0.3);
  --transition-base: all .3s ease;
}
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  font-family: system-ui, -apple-system, "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
  background: var(--primary-bg);
  color: var(--text-white);
  line-height: 1.7;
  margin: 0;
  padding: 0;
  overflow-x: hidden;
}
a { color: var(--accent-cyan); text-decoration: none; transition: var(--transition-base); }
a:hover { color: var(--accent-cyan-hover); }
img { max-width: 100%; height: auto; display: block; border: 0; }
button, input, select, textarea { font-family: inherit; }
:focus-visible { outline: 2px dashed var(--accent-cyan); outline-offset: 3px; border-radius: 4px; }
.container { max-width: 1200px; padding-left: 20px; padding-right: 20px; }
body::before {
  content: '';
  position: fixed;
  top: 0; left: 0;
  width: 100vw; height: 100vh;
  background:
    radial-gradient(ellipse 60% 40% at 15% 10%, rgba(0, 212, 255, 0.08), transparent 70%),
    radial-gradient(ellipse 50% 40% at 85% 90%, rgba(245, 181, 10, 0.05), transparent 70%);
  z-index: 0;
  pointer-events: none;
}
body::after {
  content: '';
  position: fixed;
  top: 0; left: 0;
  width: 100%; height: 100%;
  background-image:
    linear-gradient(rgba(0, 212, 255, 0.025) 1px, transparent 1px),
    linear-gradient(90deg, rgba(0, 212, 255, 0.025) 1px, transparent 1px);
  background-size: 40px 40px;
  z-index: 0;
  pointer-events: none;
}
body > * { position: relative; z-index: 1; }

/* ===== 导航 ===== */
.roulang-nav {
  min-height: 72px;
  background: rgba(5, 10, 26, 0.85);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid rgba(0, 212, 255, 0.1);
  padding-top: 0;
  padding-bottom: 0;
  transition: var(--transition-base);
}
.roulang-nav.scrolled {
  background: rgba(5, 10, 26, 0.96);
  box-shadow: 0 4px 32px rgba(0, 0, 0, 0.4);
}
.roulang-nav .navbar-brand {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--text-white);
  padding: 0;
  margin: 0;
}
.roulang-nav .navbar-brand:hover { color: var(--text-white); }
.brand-icon {
  width: 36px;
  height: 36px;
  border-radius: 10px;
  background: linear-gradient(135deg, var(--accent-cyan), #007BFF);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-size: 16px;
  box-shadow: var(--shadow-glow);
}
.brand-highlight { color: var(--accent-cyan); }
.roulang-nav .navbar-nav { gap: 8px; }
.roulang-nav .nav-link {
  color: var(--text-secondary);
  font-weight: 500;
  font-size: 0.95rem;
  padding: 8px 12px;
  border-radius: 8px;
  position: relative;
  transition: var(--transition-base);
}
.roulang-nav .nav-link:hover { color: var(--text-white); background: rgba(0, 212, 255, 0.06); }
.roulang-nav .nav-link.active {
  color: var(--text-white);
  background: rgba(0, 212, 255, 0.08);
}
.roulang-nav .nav-link.active::after {
  content: '';
  position: absolute;
  left: 12px;
  right: 12px;
  bottom: 2px;
  height: 2px;
  background: linear-gradient(90deg, var(--accent-cyan), transparent);
  border-radius: 2px;
}
.btn-nav-cta {
  background: linear-gradient(135deg, var(--accent-cyan) 0%, #007BFF 100%);
  color: #fff;
  font-weight: 600;
  font-size: 0.95rem;
  padding: 8px 22px;
  border-radius: var(--radius-btn);
  border: 0;
  margin-left: 16px;
  box-shadow: var(--shadow-glow);
  transition: var(--transition-base);
  white-space: nowrap;
}
.btn-nav-cta:hover {
  color: #fff;
  transform: scale(1.03);
  box-shadow: 0 0 32px rgba(0, 212, 255, 0.55);
}
.btn-nav-cta:active { transform: translateY(1px) scale(1); }
.navbar-toggler {
  border: 1px solid rgba(0, 212, 255, 0.4);
  border-radius: 8px;
  background: rgba(0, 212, 255, 0.05);
  padding: 6px 10px;
}
.navbar-toggler:focus { box-shadow: 0 0 0 3px rgba(0, 212, 255, 0.2); }
.navbar-toggler-icon {
  background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 30 30'%3e%3cpath stroke='rgba(0,212,255,0.9)' stroke-linecap='round' stroke-miterlimit='10' stroke-width='2' d='M4 7h22M4 15h22M4 23h22'/%3e%3c/svg%3e") !important;
}
@media (max-width: 991.98px) {
  .roulang-nav .navbar-collapse {
    background: #0A1228;
    border-radius: 12px;
    padding: 16px;
    margin-top: 12px;
    border: 1px solid rgba(0, 212, 255, 0.15);
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.5);
  }
  .roulang-nav .navbar-nav { gap: 4px; margin-bottom: 12px; }
  .roulang-nav .nav-link.active::after { display: none; }
  .btn-nav-cta { margin-left: 0; width: 100%; text-align: center; }
}

/* ===== 面包屑条 ===== */
.breadcrumb-bar {
  background: rgba(10, 18, 40, 0.7);
  border-bottom: 1px solid rgba(255, 255, 255, 0.04);
  padding: 10px 0;
  font-size: 0.82rem;
  color: var(--text-muted);
}
.breadcrumb-bar a { color: var(--text-secondary); }
.breadcrumb-bar a:hover { color: var(--accent-cyan); }
.breadcrumb-bar .divider { margin: 0 8px; color: var(--text-muted); opacity: 0.6; }
.breadcrumb-bar .current { color: var(--text-white); font-weight: 500; }

/* ===== 横幅头部 ===== */
.category-banner {
  position: relative;
  background: linear-gradient(180deg, rgba(5, 10, 26, 0.55) 0%, rgba(5, 10, 26, 0.9) 100%),
              url('/assets/images/backpic/back-1.png') center center / cover no-repeat;
  padding: 110px 0 76px;
  border-bottom: 1px solid rgba(0, 212, 255, 0.12);
}
.category-banner .breadcrumb-nav {
  margin-bottom: 28px;
}
.banner-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: linear-gradient(135deg, var(--accent-gold), #FF8A00);
  color: #1a1405;
  font-size: 0.78rem;
  font-weight: 600;
  padding: 4px 14px;
  border-radius: var(--radius-badge);
  letter-spacing: 0.5px;
  box-shadow: var(--shadow-gold);
  margin-bottom: 18px;
}
.banner-badge::before {
  content: '';
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: #1a1405;
  animation: pulse-dot 1.6s ease infinite;
}
@keyframes pulse-dot {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.4; transform: scale(0.75); }
}
.category-banner h1 {
  font-size: clamp(1.8rem, 3.5vw, 2.6rem);
  font-weight: 700;
  line-height: 1.3;
  color: var(--text-white);
  margin: 0 0 16px;
  letter-spacing: 0.5px;
}
.category-banner .banner-sub {
  color: var(--text-secondary);
  font-size: 1rem;
  line-height: 1.7;
  max-width: 560px;
  margin: 0;
}

/* ===== 正文区 ===== */
.category-content {
  padding: 56px 0 64px;
}
.category-content .row { row-gap: 32px; }
.article-card {
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-card);
  overflow: hidden;
  transition: var(--transition-base);
  box-shadow: var(--shadow-card), inset 0 1px 0 rgba(255, 255, 255, 0.05);
}
.article-card:hover {
  transform: translateY(-4px);
  border-color: var(--glass-border-hover);
  box-shadow: 0 12px 40px rgba(0, 0, 0, 0.5), 0 0 24px rgba(0, 212, 255, 0.12);
}
.article-card-link {
  display: flex;
  gap: 20px;
  padding: 20px;
  color: inherit;
  align-items: center;
}
.article-card-link:hover { color: inherit; }
.article-thumb {
  flex-shrink: 0;
  width: 160px;
  height: 108px;
  border-radius: var(--radius-thumb);
  overflow: hidden;
  background: var(--card-bg);
}
.article-thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.4s ease;
}
.article-card:hover .article-thumb img { transform: scale(1.05); }
.article-info { flex: 1; min-width: 0; }
.article-meta {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 8px;
  flex-wrap: wrap;
}
.badge-category {
  display: inline-block;
  background: rgba(0, 212, 255, 0.1);
  border: 1px solid rgba(0, 212, 255, 0.35);
  color: var(--accent-cyan);
  font-size: 0.72rem;
  font-weight: 600;
  padding: 2px 10px;
  border-radius: var(--radius-badge);
  letter-spacing: 0.3px;
}
.article-date {
  color: var(--text-muted);
  font-size: 0.78rem;
}
.article-info h3 {
  font-size: 1rem;
  font-weight: 600;
  color: var(--text-white);
  margin: 0 0 8px;
  line-height: 1.45;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.article-card:hover .article-info h3 { color: var(--accent-cyan); }
.article-info p {
  font-size: 0.85rem;
  color: var(--text-secondary);
  line-height: 1.6;
  margin: 0;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.article-arrow {
  flex-shrink: 0;
  width: 36px;
  height: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  border: 1px solid rgba(0, 212, 255, 0.25);
  color: var(--accent-cyan);
  font-size: 0.85rem;
  transition: var(--transition-base);
  opacity: 0.6;
}
.article-card:hover .article-arrow {
  transform: translateX(4px);
  opacity: 1;
  background: rgba(0, 212, 255, 0.1);
}

/* ===== 侧栏 ===== */
.sidebar-sticky { position: sticky; top: 96px; }
.sidebar-card {
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-card);
  padding: 24px;
  margin-bottom: 24px;
  box-shadow: var(--shadow-card), inset 0 1px 0 rgba(255, 255, 255, 0.05);
}
.sidebar-title {
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--text-white);
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 20px;
  padding-bottom: 14px;
  border-bottom: 1px solid rgba(0, 212, 255, 0.12);
}
.sidebar-title i { color: var(--accent-cyan); }
.tag-cloud { display: flex; flex-wrap: wrap; gap: 8px; }
.tag-cloud a {
  display: inline-block;
  background: rgba(0, 212, 255, 0.07);
  border: 1px solid rgba(0, 212, 255, 0.15);
  color: var(--text-secondary);
  font-size: 0.8rem;
  padding: 5px 14px;
  border-radius: var(--radius-badge);
  transition: var(--transition-base);
}
.tag-cloud a:hover {
  color: var(--accent-cyan);
  border-color: var(--accent-cyan);
  background: rgba(0, 212, 255, 0.1);
  transform: translateY(-2px);
}
.promo-card { text-align: center; }
.promo-image {
  width: 100%;
  height: 150px;
  border-radius: 10px;
  overflow: hidden;
  margin-bottom: 16px;
  background: var(--card-bg);
}
.promo-image img { width: 100%; height: 100%; object-fit: cover; }
.promo-card h4 {
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--text-white);
  margin-bottom: 8px;
}
.promo-card p {
  font-size: 0.85rem;
  color: var(--text-secondary);
  line-height: 1.6;
  margin-bottom: 16px;
}
.btn-promo {
  display: inline-block;
  background: linear-gradient(135deg, var(--accent-gold), #FF8A00);
  color: #1a1405;
  font-weight: 600;
  font-size: 0.9rem;
  padding: 8px 24px;
  border-radius: var(--radius-btn);
  box-shadow: var(--shadow-gold);
  transition: var(--transition-base);
  border: 0;
}
.btn-promo:hover {
  color: #1a1405;
  transform: scale(1.02);
  box-shadow: 0 0 24px rgba(245, 181, 10, 0.5);
}

/* ===== CTA区 ===== */
.cta-section {
  position: relative;
  background: linear-gradient(135deg, #0A1228 0%, #0E3A5C 50%, #0A1228 100%);
  padding: 80px 0;
  text-align: center;
  overflow: hidden;
  border-top: 1px solid rgba(0, 212, 255, 0.15);
  border-bottom: 1px solid rgba(0, 212, 255, 0.15);
}
.cta-section::before {
  content: '';
  position: absolute;
  top: -50%;
  left: -50%;
  width: 200%;
  height: 200%;
  background: linear-gradient(120deg, transparent 40%, rgba(0, 212, 255, 0.08) 50%, transparent 60%);
  animation: sheen 6s ease infinite;
  pointer-events: none;
}
@keyframes sheen {
  0% { transform: translateX(-30%) translateY(-30%); }
  50%, 100% { transform: translateX(30%) translateY(30%); }
}
.cta-section h2 {
  font-size: clamp(1.5rem, 2.8vw, 2.2rem);
  font-weight: 700;
  color: var(--text-white);
  margin-bottom: 16px;
  letter-spacing: 0.5px;
}
.cta-section .cta-desc {
  color: var(--text-secondary);
  font-size: 1rem;
  margin-bottom: 32px;
  max-width: 560px;
  margin-left: auto;
  margin-right: auto;
  line-height: 1.7;
}
.btn-cta-glow {
  display: inline-block;
  background: linear-gradient(135deg, var(--accent-cyan) 0%, #007BFF 100%);
  color: #fff;
  font-weight: 600;
  font-size: 1.15rem;
  padding: 14px 48px;
  border-radius: var(--radius-btn);
  border: 0;
  box-shadow: 0 0 32px rgba(0, 212, 255, 0.4);
  transition: var(--transition-base);
}
.btn-cta-glow:hover {
  color: #fff;
  transform: scale(1.03);
  box-shadow: 0 0 48px rgba(0, 212, 255, 0.65);
}
.btn-cta-glow:active { transform: translateY(2px) scale(1); }
.cta-safe {
  margin-top: 20px;
  color: var(--text-muted);
  font-size: 0.78rem;
}

/* ===== 页脚 ===== */
.site-footer {
  background: #04070F;
  padding: 64px 0 32px;
  border-top: 2px solid rgba(0, 212, 255, 0.25);
}
.footer-brand { margin-bottom: 16px; }
.footer-logo {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--text-white);
}
.footer-logo span { color: var(--accent-cyan); }
.footer-brand p {
  color: var(--text-muted);
  font-size: 0.85rem;
  line-height: 1.7;
  margin: 16px 0;
  max-width: 380px;
}
.social-icons { display: flex; gap: 12px; }
.social-icons a {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 38px;
  height: 38px;
  border-radius: 50%;
  background: #0E1B33;
  color: var(--accent-cyan);
  font-size: 0.9rem;
  transition: var(--transition-base);
}
.social-icons a:hover {
  background: var(--accent-cyan);
  color: #04101f;
  transform: translateY(-2px);
}
.site-footer h4 {
  font-size: 1rem;
  font-weight: 600;
  color: var(--text-white);
  margin-bottom: 18px;
  position: relative;
  padding-bottom: 10px;
}
.site-footer h4::after {
  content: '';
  position: absolute;
  left: 0;
  bottom: 0;
  width: 32px;
  height: 2px;
  background: var(--accent-cyan);
  border-radius: 2px;
}
.footer-links { list-style: none; padding: 0; margin: 0; }
.footer-links li { margin-bottom: 10px; }
.footer-links a {
  color: var(--text-muted);
  font-size: 0.88rem;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  transition: var(--transition-base);
}
.footer-links a i { font-size: 0.7rem; color: var(--accent-cyan); }
.footer-links a:hover { color: var(--accent-cyan); transform: translateX(4px); }
.footer-copy {
  color: var(--text-muted);
  font-size: 0.88rem;
  margin-bottom: 12px;
}
.footer-disclaimer {
  color: var(--text-muted);
  font-size: 0.78rem;
  line-height: 1.6;
  margin-bottom: 0;
  opacity: 0.7;
}
.footer-divider {
  border: 0;
  border-top: 1px solid rgba(0, 212, 255, 0.1);
  margin: 32px 0 24px;
}
.footer-bottom {
  text-align: center;
  color: var(--text-muted);
  font-size: 0.85rem;
  letter-spacing: 0.5px;
}

/* ===== 响应式 ===== */
@media (max-width: 991.98px) {
  .article-card-link { flex-wrap: wrap; }
  .article-arrow { display: none; }
  .sidebar-sticky { position: static; }
}
@media (max-width: 767.98px) {
  .category-banner { padding: 100px 0 56px; }
  .category-content { padding: 40px 0 48px; }
  .cta-section { padding: 56px 0; }
  .article-thumb { width: 100px; height: 80px; }
  .article-info h3 { font-size: 0.95rem; }
  .article-info p { font-size: 0.8rem; }
  .site-footer { padding: 48px 0 28px; }
}
@media (max-width: 575.98px) {
  .article-thumb { width: 80px; height: 60px; }
  .article-meta { gap: 8px; }
  .badge-category { font-size: 0.68rem; padding: 1px 8px; }
  .article-date { font-size: 0.72rem; }
  .article-card-link { padding: 14px; gap: 12px; }
  .category-banner { padding: 90px 0 48px; }
  .category-banner h1 { font-size: 1.7rem; }
  .btn-cta-glow { width: 100%; padding: 14px 20px; font-size: 1.05rem; }
  .cta-section .cta-desc { font-size: 0.9rem; }
  .tag-cloud a { font-size: 0.75rem; padding: 4px 10px; }
}

/* roulang page: article */
/* ============ 设计变量 ============ */
:root {
  --bg-deep: #050A1A;
  --bg-dark: #0A1228;
  --bg-card: #0E1B33;
  --glass-bg: rgba(255, 255, 255, 0.04);
  --glass-border: rgba(0, 212, 255, 0.18);
  --primary: #00D4FF;
  --primary-hover: #00B8E0;
  --primary-glow: rgba(0, 212, 255, 0.35);
  --amber: #F5B50A;
  --amber-gradient: linear-gradient(135deg, #F5B50A, #FF8A00);
  --coral: #FF5A5E;
  --text-main: #E8F0F8;
  --text-secondary: #8CA3B8;
  --text-muted: #5A7184;
  --text-weak: #4A6078;
  --border-subtle: rgba(255, 255, 255, 0.08);
  --bg-blue-gradient: linear-gradient(135deg, #00D4FF 0%, #007BFF 100%);
  --radius-lg: 16px;
  --radius-md: 10px;
  --radius-sm: 8px;
  --radius-pill: 999px;
  --shadow-card: 0 8px 32px rgba(0, 0, 0, 0.35);
  --shadow-glow: 0 0 20px rgba(0, 212, 255, 0.35);
  --shadow-glow-hover: 0 0 32px rgba(0, 212, 255, 0.55);
  --shadow-amber: 0 0 16px rgba(245, 181, 10, 0.3);
  --font-family: system-ui, -apple-system, "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
  --transition: all 0.3s ease;
}

/* ============ Reset & Base ============ */
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: var(--font-family);
  background-color: var(--bg-deep);
  color: var(--text-main);
  line-height: 1.6;
  padding-top: 72px;
  background-image:
    radial-gradient(ellipse at 12% 0%, rgba(0, 212, 255, 0.08), transparent 60%),
    radial-gradient(ellipse at 88% 100%, rgba(245, 181, 10, 0.04), transparent 50%);
  background-attachment: fixed;
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; height: auto; display: block; }
a { color: var(--primary); text-decoration: none; transition: var(--transition); }
a:hover { color: var(--primary-hover); }
button, input { font-family: inherit; }
h1, h2, h3, h4, h5, h6 { font-weight: 600; color: var(--text-main); line-height: 1.3; margin: 0 0 12px; }
.container { max-width: 1200px; padding-left: 16px; padding-right: 16px; }

/* ============ 通用按钮 ============ */
.btn {
  border-radius: var(--radius-md);
  font-weight: 600;
  padding: 12px 28px;
  font-size: 1rem;
  letter-spacing: 0.5px;
  transition: var(--transition);
  border: none;
  min-width: 120px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
}
.btn:focus-visible {
  outline: 2px dashed var(--primary);
  outline-offset: 3px;
}
.btn-primary {
  background: var(--bg-blue-gradient);
  color: #fff;
  box-shadow: var(--shadow-glow);
}
.btn-primary:hover {
  transform: scale(1.02);
  filter: brightness(1.1);
  color: #fff;
}
.btn-primary:active { transform: translateY(1px); }
.btn-outline {
  background: transparent;
  border: 1px solid var(--primary);
  color: var(--primary);
  box-shadow: none;
}
.btn-outline:hover {
  background: rgba(0, 212, 255, 0.1);
  color: var(--primary);
  transform: translateY(-2px);
}
.btn-amber {
  background: var(--amber-gradient);
  color: #0A1228;
  box-shadow: var(--shadow-amber);
  border: none;
}
.btn-amber:hover {
  box-shadow: 0 0 32px rgba(245, 181, 10, 0.55);
  color: #050A1A;
  transform: translateY(-2px);
}
.btn-sm { padding: 8px 18px; font-size: 0.88rem; min-width: auto; }

/* ============ 导航 ============ */
.roulang-nav {
  background: rgba(5, 10, 26, 0.85);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  min-height: 72px;
  border-bottom: 1px solid transparent;
  transition: var(--transition);
  padding: 0;
  z-index: 1050;
}
.roulang-nav.scrolled {
  background: rgba(5, 10, 26, 0.95);
  box-shadow: 0 4px 32px rgba(0, 0, 0, 0.4);
  border-bottom-color: rgba(0, 212, 255, 0.15);
}
.navbar-brand {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 1.25rem;
  font-weight: 700;
  color: #fff;
  padding: 0;
}
.navbar-brand:hover { color: #fff; }
.brand-icon {
  width: 34px;
  height: 34px;
  border-radius: 10px;
  background: var(--bg-blue-gradient);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-size: 0.8rem;
  box-shadow: 0 0 14px rgba(0, 212, 255, 0.4);
}
.brand-highlight {
  background: linear-gradient(135deg, #00D4FF, #7AE5FF);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  font-weight: 700;
}
.navbar-toggler {
  border: 1px solid rgba(0, 212, 255, 0.4);
  border-radius: 10px;
  padding: 6px 10px;
  background: transparent;
}
.navbar-toggler:focus { box-shadow: none; }
.navbar-toggler .navbar-toggler-icon {
  background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 30 30'%3e%3cpath stroke='%2300D4FF' stroke-linecap='round' stroke-miterlimit='10' stroke-width='2' d='M4 7h22M4 15h22M4 23h22'/%3e%3c/svg%3e");
}
.roulang-nav .nav-link {
  font-size: 0.95rem;
  font-weight: 500;
  color: #B0C4D9;
  padding: 8px 0;
  margin: 0 16px;
  position: relative;
  white-space: nowrap;
  transition: var(--transition);
}
.roulang-nav .nav-link::after {
  content: '';
  position: absolute;
  left: 0;
  bottom: 0;
  width: 0;
  height: 2px;
  background: var(--bg-blue-gradient);
  border-radius: 2px;
  transition: var(--transition);
  box-shadow: 0 0 8px rgba(0, 212, 255, 0.5);
}
.roulang-nav .nav-link:hover {
  color: #fff;
}
.roulang-nav .nav-link:hover::after { width: 100%; }
.roulang-nav .nav-link.active {
  color: #fff;
}
.roulang-nav .nav-link.active::after { width: 100%; }
.btn-nav-cta {
  background: var(--bg-blue-gradient);
  color: #fff;
  font-size: 0.9rem;
  font-weight: 600;
  padding: 10px 24px;
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-glow);
  margin-left: 8px;
  border: none;
  transition: var(--transition);
}
.btn-nav-cta:hover {
  color: #fff;
  transform: scale(1.03);
  box-shadow: var(--shadow-glow-hover);
}
#mainNav { gap: 4px; }

/* ============ 面包屑 ============ */
.breadcrumb-wrap {
  background: rgba(10, 18, 40, 0.6);
  border-bottom: 1px solid var(--border-subtle);
  padding: 12px 0;
  font-size: 0.86rem;
  color: var(--text-secondary);
}
.breadcrumb-wrap a {
  color: var(--text-secondary);
  transition: var(--transition);
}
.breadcrumb-wrap a:hover { color: var(--primary); }
.crumb-sep {
  color: var(--text-muted);
  margin: 0 8px;
  font-size: 0.8rem;
}
.crumb-item { color: var(--text-secondary); }
.crumb-current {
  color: #fff;
  display: inline-block;
  max-width: 220px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  vertical-align: middle;
}

/* ============ 文章页布局 ============ */
.article-page {
  padding: 40px 0 80px;
}

/* ============ 文章主体卡片 ============ */
.article-card {
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-lg);
  padding: 40px;
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  box-shadow: var(--shadow-card), inset 0 1px 0 rgba(255, 255, 255, 0.08);
  position: relative;
  overflow: hidden;
}
.article-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 140px;
  height: 140px;
  background: linear-gradient(135deg, rgba(0, 212, 255, 0.15), transparent 70%);
  border-radius: 0 0 100% 0;
  pointer-events: none;
}
.article-header {
  position: relative;
  padding-bottom: 24px;
  margin-bottom: 32px;
  border-bottom: 1px solid var(--border-subtle);
}
.article-title {
  font-size: clamp(1.5rem, 3vw, 2rem);
  font-weight: 700;
  color: #fff;
  line-height: 1.35;
  margin-bottom: 16px;
  letter-spacing: 0.5px;
}
.article-meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 16px;
  font-size: 0.86rem;
  color: var(--text-muted);
}
.meta-badge {
  display: inline-flex;
  align-items: center;
  padding: 4px 14px;
  background: rgba(0, 212, 255, 0.1);
  border: 1px solid rgba(0, 212, 255, 0.35);
  border-radius: var(--radius-pill);
  color: var(--primary);
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.5px;
}
.meta-time {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  color: var(--text-secondary);
}
.meta-time i { font-size: 0.8rem; }

/* ============ 文章正文 ============ */
.article-content {
  position: relative;
  font-size: 0.95rem;
  color: #B0C4D9;
  line-height: 1.85;
}
.article-content p {
  margin: 0 0 22px;
  color: #B0C4D9;
}
.article-content h2 {
  font-size: 1.35rem;
  font-weight: 600;
  color: #fff;
  margin: 36px 0 16px;
  padding-bottom: 10px;
  border-bottom: 2px solid var(--primary);
  display: inline-block;
}
.article-content h3 {
  font-size: 1.12rem;
  color: #fff;
  margin: 28px 0 14px;
  padding-left: 14px;
  position: relative;
}
.article-content h3::before {
  content: '';
  position: absolute;
  left: 0;
  top: 6px;
  width: 4px;
  height: 18px;
  background: var(--primary);
  border-radius: 4px;
}
.article-content img {
  border-radius: 12px;
  border: 1px solid var(--border-subtle);
  box-shadow: var(--shadow-card);
  margin: 24px 0;
}
.article-content blockquote {
  border-left: 4px solid var(--primary);
  background: rgba(0, 212, 255, 0.05);
  padding: 16px 24px;
  border-radius: 0 12px 12px 0;
  margin: 24px 0;
  font-style: italic;
  color: #E8F0F8;
}
.article-content ul,
.article-content ol {
  padding-left: 24px;
  margin: 22px 0;
}
.article-content li {
  margin-bottom: 8px;
  padding-left: 4px;
}
.article-content ul li::marker {
  color: var(--primary);
}
.article-content table {
  width: 100%;
  background: var(--bg-card);
  border-radius: 8px;
  border: 1px solid var(--border-subtle);
  margin: 24px 0;
  border-collapse: collapse;
  font-size: 0.9rem;
}
.article-content th {
  background: rgba(0, 212, 255, 0.08);
  color: #fff;
  font-weight: 600;
  padding: 12px 16px;
  border-bottom: 1px solid var(--border-subtle);
}
.article-content td {
  padding: 12px 16px;
  border-bottom: 1px solid var(--border-subtle);
  color: #B0C4D9;
}
.article-content tr:last-child td { border-bottom: none; }
.article-content code {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  padding: 2px 8px;
  border-radius: 6px;
  font-size: 0.85em;
  color: var(--primary);
  font-family: "SFMono-Regular", Consolas, monospace;
}
.article-content pre {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: 8px;
  padding: 16px;
  overflow-x: auto;
  margin: 24px 0;
}
.article-content pre code {
  background: transparent;
  border: none;
  padding: 0;
  color: #B0C4D9;
}
.article-content a {
  color: var(--primary);
  border-bottom: 1px dashed rgba(0, 212, 255, 0.5);
  transition: var(--transition);
}
.article-content a:hover {
  color: var(--primary-hover);
  border-bottom-style: solid;
}
.article-content hr {
  border: none;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--glass-border), transparent);
  margin: 32px 0;
}
.article-content iframe {
  max-width: 100%;
  border-radius: 12px;
  border: 1px solid var(--border-subtle);
  margin: 24px 0;
}
.article-content strong {
  color: #fff;
  font-weight: 600;
}

/* ============ 分享区 ============ */
.article-share {
  position: relative;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 12px;
  padding-top: 24px;
  margin-top: 32px;
  border-top: 1px solid var(--border-subtle);
}
.article-share span {
  font-size: 0.86rem;
  color: var(--text-muted);
}
.article-share a {
  width: 38px;
  height: 38px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid var(--border-subtle);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  color: var(--text-secondary);
  font-size: 0.85rem;
  transition: var(--transition);
}
.article-share a:hover {
  background: var(--primary);
  border-color: var(--primary);
  color: #050A1A;
  box-shadow: var(--shadow-glow);
}
.article-share .btn-outline {
  width: auto;
  height: auto;
  border-radius: var(--radius-md);
  padding: 8px 18px;
  font-size: 0.86rem;
  margin-left: auto;
}

/* ============ 空状态 ============ */
.article-empty {
  position: relative;
  text-align: center;
  padding: 64px 24px;
}
.article-empty i {
  font-size: 3rem;
  color: var(--text-muted);
  margin-bottom: 16px;
  display: block;
}
.article-empty h3 {
  font-size: 1.4rem;
  color: #fff;
  margin-bottom: 12px;
}
.article-empty p {
  color: var(--text-secondary);
  max-width: 360px;
  margin: 0 auto 24px;
}

/* ============ 侧栏 ============ */
.sidebar-widget {
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-lg);
  padding: 24px;
  margin-bottom: 24px;
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  box-shadow: var(--shadow-card), inset 0 1px 0 rgba(255, 255, 255, 0.08);
}
.widget-title {
  font-size: 1.1rem;
  font-weight: 600;
  color: #fff;
  padding-left: 14px;
  position: relative;
  margin-bottom: 18px;
}
.widget-title::before {
  content: '';
  position: absolute;
  left: 0;
  top: 4px;
  width: 4px;
  height: 18px;
  background: var(--primary);
  border-radius: 4px;
  box-shadow: 0 0 8px rgba(0, 212, 255, 0.5);
}
.widget-title i {
  color: var(--primary);
  margin-right: 6px;
  font-size: 0.95rem;
}
.popular-list {
  list-style: none;
  padding: 0;
  margin: 0;
}
.popular-item {
  border-bottom: 1px solid var(--border-subtle);
  padding: 12px 0;
  transition: var(--transition);
}
.popular-item:last-child { border-bottom: none; }
.popular-item a { display: block; }
.popular-title {
  font-size: 0.92rem;
  font-weight: 500;
  color: var(--text-main);
  line-height: 1.5;
  margin-bottom: 4px;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  transition: var(--transition);
}
.popular-item:hover .popular-title {
  color: var(--primary);
}
.popular-date {
  font-size: 0.78rem;
  color: var(--text-muted);
}
.promo-widget {
  padding: 16px;
  overflow: hidden;
  position: relative;
}
.promo-widget img {
  border-radius: 12px;
  margin-bottom: 16px;
  width: 100%;
  height: 160px;
  object-fit: cover;
  border: 1px solid var(--border-subtle);
}
.promo-body {
  text-align: center;
  padding: 0 8px;
}
.promo-body h4 {
  font-size: 1.05rem;
  color: #fff;
  margin-bottom: 8px;
}
.promo-body p {
  font-size: 0.85rem;
  color: var(--text-secondary);
  margin-bottom: 16px;
  line-height: 1.6;
}
.promo-body .btn {
  width: 100%;
}

/* ============ 页脚 ============ */
.site-footer {
  background: #04070F;
  border-top: 2px solid transparent;
  border-image: linear-gradient(90deg, #00D4FF, #007BFF, #F5B50A) 1;
  padding: 64px 0 32px;
}
.footer-brand .footer-logo {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 1.2rem;
  font-weight: 700;
  color: #fff;
  margin-bottom: 16px;
}
.footer-brand .footer-logo:hover { color: #fff; }
.footer-brand .footer-logo span {
  background: linear-gradient(135deg, #00D4FF, #7AE5FF);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}
.footer-brand p {
  color: var(--text-muted);
  font-size: 0.9rem;
  line-height: 1.7;
  max-width: 360px;
  margin-bottom: 20px;
}
.social-icons {
  display: flex;
  gap: 12px;
}
.social-icons a {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--border-subtle);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  color: var(--text-secondary);
  font-size: 0.9rem;
  transition: var(--transition);
}
.social-icons a:hover {
  background: var(--primary);
  border-color: var(--primary);
  color: #050A1A;
  transform: translateY(-2px);
  box-shadow: var(--shadow-glow);
}
.site-footer h4 {
  font-size: 1rem;
  color: #fff;
  margin-bottom: 18px;
  padding-bottom: 10px;
  position: relative;
}
.site-footer h4::after {
  content: '';
  position: absolute;
  left: 0;
  bottom: 0;
  width: 30px;
  height: 2px;
  background: var(--primary);
  border-radius: 2px;
}
.footer-links {
  list-style: none;
  padding: 0;
  margin: 0;
}
.footer-links li {
  margin-bottom: 10px;
}
.footer-links a {
  color: var(--text-muted);
  font-size: 0.9rem;
  transition: var(--transition);
  display: inline-flex;
  align-items: center;
  gap: 6px;
}
.footer-links a i {
  font-size: 0.7rem;
  color: var(--primary);
}
.footer-links a:hover {
  color: var(--primary);
  padding-left: 4px;
}
.footer-copy {
  color: var(--text-weak);
  font-size: 0.86rem;
  margin-bottom: 8px;
}
.footer-disclaimer {
  color: var(--text-weak);
  font-size: 0.8rem;
  line-height: 1.6;
}
.footer-divider {
  border: none;
  height: 1px;
  background: rgba(255, 255, 255, 0.06);
  margin: 32px 0 20px;
}
.footer-bottom {
  text-align: center;
  color: var(--text-weak);
  font-size: 0.82rem;
  letter-spacing: 1px;
}

/* ============ 响应式 ============ */
@media (max-width: 991.98px) {
  body { padding-top: 64px; }
  .roulang-nav { min-height: 64px; }
  #mainNav {
    background: var(--bg-dark);
    border-radius: 0 0 16px 16px;
    padding: 16px;
    border: 1px solid rgba(0, 212, 255, 0.15);
    margin-top: 8px;
  }
  .roulang-nav .nav-link {
    display: block;
    width: 100%;
    padding: 10px 12px;
    margin: 0;
    border-radius: 8px;
  }
  .roulang-nav .nav-link::after { display: none; }
  .roulang-nav .nav-link:hover {
    background: rgba(0, 212, 255, 0.1);
  }
  .roulang-nav .nav-link.active {
    background: rgba(0, 212, 255, 0.12);
  }
  ul.navbar-nav.ms-auto {
    margin-bottom: 12px;
  }
  .btn-nav-cta {
    width: 100%;
    margin-left: 0;
    justify-content: center;
  }
  .article-page { padding: 24px 0 56px; }
  .article-card { padding: 28px; }
}

@media (max-width: 767.98px) {
  body { padding-top: 60px; }
  .article-card { padding: 22px; }
  .article-title { font-size: 1.3rem; }
  .article-content { font-size: 0.9rem; }
  .article-share .btn-outline { width: 100%; margin-left: 0; justify-content: center; }
  .sidebar-widget { padding: 20px; }
  .footer-bottom { font-size: 0.76rem; }
  body {
    background-attachment: scroll;
  }
}

@media (max-width: 575.98px) {
  .container { padding-left: 14px; padding-right: 14px; }
  .article-card { padding: 18px; border-radius: 14px; }
  .article-header { padding-bottom: 18px; margin-bottom: 24px; }
  .article-meta { gap: 10px; flex-direction: column; align-items: flex-start; }
  .breadcrumb-wrap { font-size: 0.8rem; }
  .crumb-current { max-width: 140px; }
}

/* ============ 页脚移动端 ============ */
@media (max-width: 991.98px) {
  .site-footer { padding: 48px 0 24px; }
  .site-footer .col-lg-5,
  .site-footer .col-lg-3,
  .site-footer .col-lg-4 {
    margin-bottom: 28px;
  }
}

/* roulang page: category2 */
/* ===== 设计变量 ===== */
        :root {
            --primary: #00D4FF;
            --primary-dark: #007BFF;
            --primary-deep: #0056A0;
            --primary-hover: #00B8E0;
            --gold: #F5B50A;
            --gold-light: #FFD54F;
            --gold-gradient: linear-gradient(135deg, #F5B50A, #FF8A00);
            --coral: #FF5A5E;
            --bg-deep: #050A1A;
            --bg-dark: #0A1228;
            --bg-card: #0E1B33;
            --bg-glass: rgba(255, 255, 255, 0.04);
            --border-glass: rgba(0, 212, 255, 0.18);
            --border-glass-hover: rgba(0, 212, 255, 0.35);
            --text-white: #E8F0F8;
            --text-gray: #8CA3B8;
            --text-muted: #5A7184;
            --text-body: #B0C4D9;
            --radius-lg: 16px;
            --radius-md: 10px;
            --radius-sm: 8px;
            --radius-pill: 999px;
            --shadow-card: 0 8px 32px rgba(0, 0, 0, 0.35);
            --shadow-glow: 0 0 20px rgba(0, 212, 255, 0.35);
            --shadow-glow-strong: 0 0 32px rgba(0, 212, 255, 0.55);
            --shadow-gold: 0 0 16px rgba(245, 181, 10, 0.3);
            --font-main: system-ui, -apple-system, "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
            --transition: 0.3s ease;
        }

        /* ===== Reset & Base ===== */
        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        html {
            scroll-behavior: smooth;
            scroll-padding-top: 80px;
        }
        body {
            font-family: var(--font-main);
            background-color: var(--bg-deep);
            color: var(--text-body);
            font-size: 0.95rem;
            line-height: 1.8;
            overflow-x: hidden;
            padding-top: 72px;
            background-image:
                radial-gradient(ellipse 60% 40% at 10% 10%, rgba(0, 212, 255, 0.08), transparent 70%),
                radial-gradient(ellipse 50% 35% at 90% 85%, rgba(245, 181, 10, 0.05), transparent 70%);
            background-attachment: fixed;
        }
        body::before {
            content: "";
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background-image: linear-gradient(rgba(0, 212, 255, 0.02) 1px, transparent 1px),
                linear-gradient(90deg, rgba(0, 212, 255, 0.02) 1px, transparent 1px);
            background-size: 60px 60px;
            pointer-events: none;
            z-index: 0;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        a {
            text-decoration: none;
            transition: color var(--transition), background var(--transition), transform var(--transition), box-shadow var(--transition);
        }
        button,
        input {
            font-family: var(--font-main);
        }
        .container {
            max-width: 1200px;
        }

        /* ===== 通用按钮 ===== */
        .btn-primary-glow {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            background: linear-gradient(135deg, #00D4FF 0%, #007BFF 100%);
            color: #fff;
            font-weight: 600;
            font-size: 1rem;
            padding: 12px 28px;
            border-radius: var(--radius-md);
            border: none;
            box-shadow: var(--shadow-glow);
            transition: all var(--transition);
            text-decoration: none;
            letter-spacing: 0.5px;
            min-width: 120px;
            cursor: pointer;
        }
        .btn-primary-glow:hover {
            color: #fff;
            transform: scale(1.02);
            box-shadow: var(--shadow-glow-strong);
            background: linear-gradient(135deg, #00B8E0, #007BFF);
        }
        .btn-primary-glow:active {
            transform: translateY(1px) scale(0.99);
        }
        .btn-primary-glow:focus-visible,
        .btn-outline-cyan:focus-visible,
        .btn-gold-glow:focus-visible,
        .btn-nav-cta:focus-visible {
            outline: 2px dashed var(--primary);
            outline-offset: 3px;
        }
        .btn-outline-cyan {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            background: transparent;
            color: var(--primary);
            font-weight: 600;
            font-size: 1rem;
            padding: 12px 28px;
            border-radius: var(--radius-md);
            border: 1px solid var(--primary);
            transition: all var(--transition);
            text-decoration: none;
            min-width: 120px;
            cursor: pointer;
        }
        .btn-outline-cyan:hover {
            background: rgba(0, 212, 255, 0.1);
            color: var(--text-white);
            border-color: var(--primary);
            box-shadow: var(--shadow-glow);
        }
        .btn-outline-cyan:active {
            transform: translateY(1px);
        }
        .btn-gold-glow {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            background: var(--gold-gradient);
            color: #1A1A1A;
            font-weight: 700;
            font-size: 1rem;
            padding: 12px 28px;
            border-radius: var(--radius-md);
            border: none;
            box-shadow: var(--shadow-gold);
            transition: all var(--transition);
            text-decoration: none;
            min-width: 120px;
            cursor: pointer;
        }
        .btn-gold-glow:hover {
            color: #1A1A1A;
            transform: scale(1.02);
            box-shadow: 0 0 24px rgba(245, 181, 10, 0.5);
        }
        .btn-gold-glow:active {
            transform: translateY(1px);
        }

        /* ===== 导航 ===== */
        .roulang-nav {
            background: rgba(5, 10, 26, 0.85);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            padding: 0;
            height: 72px;
            border-bottom: 1px solid rgba(0, 212, 255, 0.1);
            transition: background 0.4s ease, box-shadow 0.4s ease;
            z-index: 1050;
        }
        .roulang-nav.scrolled {
            background: rgba(5, 10, 26, 0.95);
            box-shadow: 0 4px 32px rgba(0, 0, 0, 0.4);
        }
        .roulang-nav .navbar-brand {
            display: flex;
            align-items: center;
            gap: 10px;
            font-weight: 700;
            font-size: 1.25rem;
            color: var(--text-white);
            padding: 0;
        }
        .roulang-nav .navbar-brand:hover {
            color: var(--text-white);
        }
        .brand-icon {
            width: 36px;
            height: 36px;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            background: linear-gradient(135deg, #00D4FF, #007BFF);
            border-radius: 8px;
            color: #fff;
            font-size: 0.95rem;
            box-shadow: var(--shadow-glow);
            flex-shrink: 0;
        }
        .brand-highlight {
            background: linear-gradient(135deg, #00D4FF, #00B8E0);
            -webkit-background-clip: text;
            background-clip: text;
            -webkit-text-fill-color: transparent;
        }
        .roulang-nav .navbar-nav {
            gap: 4px;
        }
        .roulang-nav .nav-link {
            font-weight: 500;
            font-size: 0.95rem;
            color: var(--text-gray);
            padding: 8px 16px;
            border-radius: var(--radius-sm);
            position: relative;
            transition: color var(--transition);
        }
        .roulang-nav .nav-link::after {
            content: "";
            position: absolute;
            bottom: 2px;
            left: 50%;
            transform: translateX(-50%);
            width: 0;
            height: 2px;
            background: linear-gradient(90deg, #00D4FF, #007BFF);
            border-radius: 2px;
            transition: width var(--transition);
        }
        .roulang-nav .nav-link:hover {
            color: #fff;
        }
        .roulang-nav .nav-link:hover::after {
            width: 24px;
        }
        .roulang-nav .nav-link.active {
            color: #fff;
            font-weight: 600;
        }
        .roulang-nav .nav-link.active::after {
            width: 24px;
            box-shadow: 0 0 8px rgba(0, 212, 255, 0.6);
        }
        .btn-nav-cta {
            margin-left: 24px;
            padding: 8px 20px;
            font-size: 0.9rem;
            border-radius: var(--radius-md);
            background: linear-gradient(135deg, #00D4FF, #007BFF);
            color: #fff;
            font-weight: 600;
            border: none;
            box-shadow: var(--shadow-glow);
            transition: all var(--transition);
            white-space: nowrap;
        }
        .btn-nav-cta:hover {
            color: #fff;
            transform: scale(1.03);
            box-shadow: var(--shadow-glow-strong);
        }
        .navbar-toggler {
            border: 1px solid rgba(0, 212, 255, 0.5) !important;
            border-radius: var(--radius-sm);
            padding: 6px 10px;
            background: rgba(0, 212, 255, 0.1);
        }
        .navbar-toggler:focus {
            box-shadow: 0 0 0 3px rgba(0, 212, 255, 0.2);
        }
        .navbar-toggler-icon {
            background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 30 30'%3e%3cpath stroke='rgba(0,212,255,0.9)' stroke-linecap='round' stroke-miterlimit='10' stroke-width='2' d='M4 7h22M4 15h22M4 23h22'/%3e%3c/svg%3e");
        }

        /* ===== 分类页Banner ===== */
        .cat-banner {
            position: relative;
            min-height: 380px;
            display: flex;
            align-items: center;
            padding: 80px 0 64px;
            background-image: url("/assets/images/backpic/back-2.webp");
            background-size: cover;
            background-position: center;
            background-color: var(--bg-dark);
        }
        .cat-banner::before {
            content: "";
            position: absolute;
            inset: 0;
            background: linear-gradient(90deg, rgba(5, 10, 26, 0.92) 0%, rgba(5, 10, 26, 0.7) 60%, rgba(5, 10, 26, 0.4) 100%);
            z-index: 0;
        }
        .cat-banner::after {
            content: "";
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 1px;
            background: linear-gradient(90deg, var(--primary), transparent 70%);
            opacity: 0.5;
        }
        .cat-banner .container {
            position: relative;
            z-index: 1;
        }
        .cat-banner .banner-badge {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            background: var(--gold-gradient);
            color: #1A1A1A;
            font-size: 0.8rem;
            font-weight: 700;
            padding: 4px 16px;
            border-radius: var(--radius-pill);
            margin-bottom: 20px;
            box-shadow: var(--shadow-gold);
            letter-spacing: 0.5px;
        }
        .cat-banner .banner-badge .pulse-dot {
            width: 6px;
            height: 6px;
            background: #1A1A1A;
            border-radius: 50%;
            display: inline-block;
            animation: pulse-dot 1.5s infinite;
        }
        @keyframes pulse-dot {
            0%,
            100% {
                opacity: 1;
                transform: scale(1);
            }
            50% {
                opacity: 0.4;
                transform: scale(1.4);
            }
        }
        .cat-banner h1 {
            font-size: clamp(1.8rem, 3.5vw, 2.6rem);
            font-weight: 700;
            line-height: 1.3;
            color: var(--text-white);
            margin-bottom: 16px;
        }
        .cat-banner h1 .gradient-text {
            background: linear-gradient(135deg, #00D4FF, #fff);
            -webkit-background-clip: text;
            background-clip: text;
            -webkit-text-fill-color: transparent;
        }
        .cat-banner .banner-sub {
            font-size: 1rem;
            color: var(--text-gray);
            line-height: 1.7;
            max-width: 560px;
            margin-bottom: 24px;
        }
        .breadcrumb-nav {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 0.8rem;
            color: var(--text-muted);
            margin-bottom: 24px;
            flex-wrap: wrap;
        }
        .breadcrumb-nav a {
            color: var(--text-muted);
            transition: color var(--transition);
        }
        .breadcrumb-nav a:hover {
            color: var(--primary);
        }
        .breadcrumb-nav .sep {
            color: var(--text-muted);
            opacity: 0.5;
        }
        .breadcrumb-nav .current {
            color: var(--text-white);
        }

        /* ===== 通用区块 ===== */
        .section-padding {
            padding: 80px 0;
        }
        .section-padding-sm {
            padding: 56px 0;
        }
        .section-head {
            text-align: center;
            margin-bottom: 48px;
        }
        .section-head .section-tag {
            display: inline-block;
            font-size: 0.8rem;
            font-weight: 700;
            color: var(--primary);
            text-transform: uppercase;
            letter-spacing: 2px;
            margin-bottom: 8px;
        }
        .section-head h2 {
            font-size: 1.5rem;
            font-weight: 700;
            color: var(--text-white);
            line-height: 1.3;
            margin-bottom: 12px;
        }
        .section-head h2::before {
            content: "";
            display: inline-block;
            width: 4px;
            height: 20px;
            background: var(--primary);
            border-radius: 2px;
            margin-right: 12px;
            vertical-align: middle;
            box-shadow: var(--shadow-glow);
        }
        .section-head p {
            color: var(--text-gray);
            font-size: 0.95rem;
            max-width: 600px;
            margin: 0 auto;
        }
        .section-alt {
            background-color: var(--bg-dark);
            border-top: 1px solid rgba(0, 212, 255, 0.06);
            border-bottom: 1px solid rgba(0, 212, 255, 0.06);
        }

        /* ===== 核心卖点 ===== */
        .feature-card {
            background: var(--bg-glass);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border: 1px solid var(--border-glass);
            border-radius: var(--radius-lg);
            padding: 32px 24px;
            position: relative;
            transition: all var(--transition);
            height: 100%;
            overflow: hidden;
        }
        .feature-card::before {
            content: "";
            position: absolute;
            top: 0;
            left: 0;
            width: 40px;
            height: 2px;
            background: var(--primary);
            border-radius: 2px;
            box-shadow: 0 0 12px rgba(0, 212, 255, 0.6);
        }
        .feature-card::after {
            content: "";
            position: absolute;
            top: 0;
            right: 0;
            width: 2px;
            height: 40px;
            background: rgba(0, 212, 255, 0.2);
            border-radius: 2px;
        }
        .feature-card:hover {
            background: rgba(255, 255, 255, 0.06);
            border-color: var(--border-glass-hover);
            transform: translateY(-4px);
            box-shadow: var(--shadow-card), var(--shadow-glow);
        }
        .feature-icon {
            width: 48px;
            height: 48px;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            background: var(--bg-card);
            color: var(--primary);
            font-size: 1.2rem;
            border: 1px solid var(--border-glass);
            margin-bottom: 20px;
            transition: all var(--transition);
        }
        .feature-card:hover .feature-icon {
            background: rgba(0, 212, 255, 0.1);
            box-shadow: var(--shadow-glow);
            transform: scale(1.05);
        }
        .feature-card .feature-icon.gold {
            color: var(--gold);
            border-color: rgba(245, 181, 10, 0.3);
        }
        .feature-card:hover .feature-icon.gold {
            background: rgba(245, 181, 10, 0.1);
            box-shadow: var(--shadow-gold);
        }
        .feature-card h3 {
            font-size: 1.05rem;
            font-weight: 600;
            color: var(--text-white);
            margin-bottom: 10px;
        }
        .feature-card h3 .arrow-icon {
            opacity: 0;
            transform: translateX(-6px);
            transition: all var(--transition);
            display: inline-block;
            margin-left: 4px;
            color: var(--primary);
        }
        .feature-card:hover h3 .arrow-icon {
            opacity: 1;
            transform: translateX(0);
        }
        .feature-card p {
            font-size: 0.85rem;
            color: var(--text-gray);
            line-height: 1.6;
            margin-bottom: 0;
            display: -webkit-box;
            -webkit-line-clamp: 3;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }

        /* ===== 适用场景 ===== */
        .scenario-card {
            background: var(--bg-glass);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border: 1px solid var(--border-glass);
            border-radius: var(--radius-lg);
            padding: 28px 24px;
            transition: all var(--transition);
            height: 100%;
            position: relative;
        }
        .scenario-card::before {
            content: "";
            position: absolute;
            bottom: 0;
            left: 24px;
            right: 24px;
            height: 2px;
            background: linear-gradient(90deg, transparent, var(--primary), transparent);
            opacity: 0;
            transition: opacity var(--transition);
            border-radius: 2px;
        }
        .scenario-card:hover {
            border-color: var(--border-glass-hover);
            transform: translateY(-4px);
            box-shadow: var(--shadow-card);
        }
        .scenario-card:hover::before {
            opacity: 1;
        }
        .scenario-num {
            font-size: 0.8rem;
            font-weight: 700;
            color: var(--gold);
            letter-spacing: 1px;
            margin-bottom: 12px;
            display: block;
        }
        .scenario-card h3 {
            font-size: 1.05rem;
            font-weight: 600;
            color: var(--text-white);
            margin-bottom: 10px;
        }
        .scenario-card p {
            font-size: 0.85rem;
            color: var(--text-gray);
            line-height: 1.6;
            margin-bottom: 0;
        }
        .scenario-icon {
            font-size: 1.6rem;
            color: var(--primary);
            margin-bottom: 16px;
            display: block;
            transition: transform var(--transition);
        }
        .scenario-card:hover .scenario-icon {
            transform: scale(1.1) rotate(-5deg);
        }

        /* ===== 攻略流程 ===== */
        .process-step {
            text-align: center;
            padding: 32px 20px;
            position: relative;
        }
        .process-step::after {
            content: "";
            position: absolute;
            top: 40px;
            right: -15px;
            width: 30px;
            height: 2px;
            background: linear-gradient(90deg, rgba(0, 212, 255, 0.4), transparent);
            border-radius: 2px;
        }
        .process-step:last-child::after {
            display: none;
        }
        .process-number {
            width: 64px;
            height: 64px;
            margin: 0 auto 20px;
            border-radius: 50%;
            background: var(--bg-card);
            border: 2px solid var(--border-glass);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.4rem;
            font-weight: 700;
            color: var(--primary);
            position: relative;
            transition: all var(--transition);
            box-shadow: 0 4px 16px rgba(0, 0, 0, 0.3);
        }
        .process-step:hover .process-number {
            border-color: var(--primary);
            box-shadow: var(--shadow-glow);
            transform: scale(1.05);
        }
        .process-step h3 {
            font-size: 1rem;
            font-weight: 600;
            color: var(--text-white);
            margin-bottom: 10px;
        }
        .process-step p {
            font-size: 0.82rem;
            color: var(--text-gray);
            line-height: 1.6;
            margin-bottom: 0;
        }

        /* ===== 内容精选区 ===== */
        .content-grid-section {
            background-color: var(--bg-dark);
        }
        .content-card {
            background: var(--bg-glass);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border: 1px solid var(--border-glass);
            border-radius: var(--radius-lg);
            overflow: hidden;
            transition: all var(--transition);
            height: 100%;
            display: flex;
            flex-direction: column;
        }
        .content-card:hover {
            border-color: var(--border-glass-hover);
            transform: translateY(-4px);
            box-shadow: var(--shadow-card), var(--shadow-glow);
        }
        .content-card .card-img {
            position: relative;
            overflow: hidden;
            padding-top: 66%;
            background-color: var(--bg-card);
        }
        .content-card .card-img img {
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.5s ease;
        }
        .content-card:hover .card-img img {
            transform: scale(1.05);
        }
        .content-card .card-img::after {
            content: "";
            position: absolute;
            inset: 0;
            background: linear-gradient(180deg, transparent 50%, rgba(5, 10, 26, 0.7));
        }
        .card-body-content {
            padding: 20px;
            flex: 1;
            display: flex;
            flex-direction: column;
        }
        .card-meta {
            display: flex;
            align-items: center;
            gap: 8px;
            margin-bottom: 10px;
            flex-wrap: wrap;
        }
        .card-badge {
            display: inline-block;
            background: rgba(0, 212, 255, 0.12);
            border: 1px solid rgba(0, 212, 255, 0.3);
            color: var(--primary);
            font-size: 0.7rem;
            font-weight: 600;
            padding: 2px 10px;
            border-radius: var(--radius-pill);
        }
        .card-badge.gold {
            background: rgba(245, 181, 10, 0.1);
            border-color: rgba(245, 181, 10, 0.3);
            color: var(--gold);
        }
        .card-time {
            font-size: 0.72rem;
            color: var(--text-muted);
        }
        .content-card h3 {
            font-size: 1rem;
            font-weight: 600;
            color: var(--text-white);
            margin-bottom: 8px;
            line-height: 1.4;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .content-card p {
            font-size: 0.82rem;
            color: var(--text-gray);
            line-height: 1.6;
            margin-bottom: 14px;
            flex: 1;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .card-link {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-size: 0.82rem;
            color: var(--primary);
            font-weight: 600;
            transition: all var(--transition);
        }
        .card-link i {
            transition: transform var(--transition);
        }
        .card-link:hover {
            color: var(--text-white);
        }
        .card-link:hover i {
            transform: translateX(4px);
        }

        /* ===== 侧栏 ===== */
        .sidebar-widget {
            background: var(--bg-glass);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border: 1px solid var(--border-glass);
            border-radius: var(--radius-lg);
            padding: 24px;
            margin-bottom: 24px;
        }
        .sidebar-widget h4 {
            font-size: 1rem;
            font-weight: 600;
            color: var(--text-white);
            margin-bottom: 16px;
            position: relative;
            padding-bottom: 10px;
        }
        .sidebar-widget h4::after {
            content: "";
            position: absolute;
            bottom: 0;
            left: 0;
            width: 32px;
            height: 2px;
            background: var(--primary);
            border-radius: 2px;
            box-shadow: var(--shadow-glow);
        }
        .tag-cloud {
            display: flex;
            flex-wrap: wrap;
            gap: 8px;
        }
        .tag-cloud .tag-item {
            display: inline-block;
            background: rgba(255, 255, 255, 0.04);
            border: 1px solid rgba(0, 212, 255, 0.15);
            color: var(--text-gray);
            font-size: 0.78rem;
            padding: 4px 14px;
            border-radius: var(--radius-pill);
            transition: all var(--transition);
            cursor: pointer;
        }
        .tag-cloud .tag-item:hover {
            background: rgba(0, 212, 255, 0.1);
            border-color: var(--primary);
            color: var(--primary);
            box-shadow: var(--shadow-glow);
        }
        .promo-card {
            text-align: center;
            padding: 0;
            overflow: hidden;
        }
        .promo-card .promo-img {
            position: relative;
            padding-top: 56%;
            background-size: cover;
            background-position: center;
            background-color: var(--bg-card);
        }
        .promo-card .promo-img::after {
            content: "";
            position: absolute;
            inset: 0;
            background: linear-gradient(180deg, transparent, rgba(5, 10, 26, 0.8));
        }
        .promo-card-inner {
            padding: 20px;
        }
        .promo-card-inner h5 {
            font-size: 0.95rem;
            font-weight: 600;
            color: var(--text-white);
            margin-bottom: 6px;
        }
        .promo-card-inner p {
            font-size: 0.8rem;
            color: var(--text-gray);
            margin-bottom: 14px;
            line-height: 1.5;
        }
        .promo-card .btn-gold-glow {
            padding: 8px 20px;
            font-size: 0.85rem;
            min-width: 100px;
        }

        /* ===== FAQ ===== */
        .faq-section {
            background-color: var(--bg-deep);
        }
        .faq-accordion .accordion-item {
            background: var(--bg-glass);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border: 1px solid var(--border-glass);
            border-radius: var(--radius-md) !important;
            margin-bottom: 12px;
            overflow: hidden;
            transition: border-color var(--transition);
        }
        .faq-accordion .accordion-item:has(.accordion-button:not(.collapsed)) {
            border-color: rgba(245, 181, 10, 0.4);
            box-shadow: 0 4px 16px rgba(245, 181, 10, 0.05);
        }
        .faq-accordion .accordion-button {
            background: transparent;
            color: var(--text-white);
            font-size: 1rem;
            font-weight: 600;
            padding: 18px 20px;
            gap: 12px;
            box-shadow: none;
            border-radius: var(--radius-md) !important;
            transition: all var(--transition);
            position: relative;
            align-items: center;
        }
        .faq-accordion .accordion-button::after {
            display: none;
        }
        .faq-accordion .accordion-button:not(.collapsed) {
            background: rgba(0, 212, 255, 0.03);
            color: var(--text-white);
            box-shadow: none;
        }
        .faq-accordion .accordion-button:focus {
            box-shadow: 0 0 0 3px rgba(0, 212, 255, 0.15);
        }
        .faq-q-icon {
            width: 28px;
            height: 28px;
            background: linear-gradient(135deg, #00D4FF, #007BFF);
            color: #fff;
            border-radius: 50%;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            font-size: 0.75rem;
            font-weight: 700;
            flex-shrink: 0;
        }
        .faq-toggle-icon {
            margin-left: auto;
            width: 28px;
            height: 28px;
            border-radius: 50%;
            border: 1px solid rgba(0, 212, 255, 0.3);
            display: inline-flex;
            align-items: center;
            justify-content: center;
            font-size: 0.85rem;
            color: var(--primary);
            transition: all var(--transition);
            flex-shrink: 0;
        }
        .accordion-button:not(.collapsed) .faq-toggle-icon {
            transform: rotate(45deg);
            background: rgba(0, 212, 255, 0.15);
            border-color: var(--primary);
        }
        .faq-accordion .accordion-collapse {
            transition: background 0.3s ease;
        }
        .faq-accordion .accordion-body {
            padding: 0 20px 20px 56px;
            font-size: 0.9rem;
            color: var(--text-body);
            line-height: 1.7;
            border-left: 3px solid var(--gold);
            margin-left: 20px;
            margin-right: 20px;
            margin-bottom: 16px;
            border-radius: 0 0 0 4px;
            position: relative;
        }
        .faq-accordion .accordion-body::before {
            content: "A";
            position: absolute;
            top: 0;
            left: -18px;
            width: 22px;
            height: 22px;
            background: var(--bg-card);
            border: 1px solid rgba(0, 212, 255, 0.4);
            color: var(--primary);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 0.65rem;
            font-weight: 700;
        }
        .faq-more {
            text-align: center;
            margin-top: 24px;
        }
        .faq-more a {
            color: var(--primary);
            font-size: 0.9rem;
            font-weight: 500;
            display: inline-flex;
            align-items: center;
            gap: 6px;
            transition: all var(--transition);
        }
        .faq-more a:hover {
            color: var(--text-white);
        }
        .faq-more a i {
            transition: transform var(--transition);
        }
        .faq-more a:hover i {
            transform: translateX(4px);
        }

        /* ===== CTA区 ===== */
        .cta-section {
            position: relative;
            padding: 96px 0;
            background: linear-gradient(135deg, #0A1228 0%, #0E3A5C 50%, #0A1228 100%);
            overflow: hidden;
            text-align: center;
        }
        .cta-section::before {
            content: "";
            position: absolute;
            top: -50%;
            left: -10%;
            width: 60%;
            height: 200%;
            background: radial-gradient(ellipse, rgba(0, 212, 255, 0.12), transparent 70%);
            animation: cta-glow-drift 12s ease-in-out infinite alternate;
        }
        .cta-section::after {
            content: "";
            position: absolute;
            bottom: -30%;
            right: -10%;
            width: 50%;
            height: 160%;
            background: radial-gradient(ellipse, rgba(245, 181, 10, 0.08), transparent 70%);
            animation: cta-glow-drift 16s ease-in-out infinite alternate-reverse;
        }
        @keyframes cta-glow-drift {
            0% {
                transform: translateX(0) translateY(0);
            }
            100% {
                transform: translateX(40px) translateY(-20px);
            }
        }
        .cta-section .container {
            position: relative;
            z-index: 1;
        }
        .cta-section h2 {
            font-size: clamp(1.6rem, 3vw, 2.2rem);
            font-weight: 700;
            color: var(--text-white);
            margin-bottom: 16px;
        }
        .cta-section .cta-desc {
            font-size: 1rem;
            color: var(--text-gray);
            max-width: 520px;
            margin: 0 auto 32px;
            line-height: 1.7;
        }
        .cta-section .btn-cta-large {
            padding: 16px 48px;
            font-size: 1.2rem;
            box-shadow: 0 0 24px rgba(0, 212, 255, 0.5);
        }
        .cta-section .btn-cta-large:hover {
            box-shadow: 0 0 40px rgba(0, 212, 255, 0.7);
        }
        .cta-note {
            margin-top: 16px;
            font-size: 0.8rem;
            color: var(--text-muted);
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 6px;
        }
        .cta-note .badge-dot {
            width: 6px;
            height: 6px;
            background: var(--gold);
            border-radius: 50%;
            display: inline-block;
            animation: pulse-dot 1.5s infinite;
        }

        /* ===== 页脚 ===== */
        .site-footer {
            background-color: #04070F;
            border-top: 2px solid transparent;
            border-image: linear-gradient(90deg, var(--primary), transparent) 1;
            padding: 64px 0 32px;
            color: var(--text-gray);
        }
        .site-footer .footer-brand .footer-logo {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            font-size: 1.3rem;
            font-weight: 700;
            color: var(--text-white);
            margin-bottom: 16px;
        }
        .site-footer .footer-brand .footer-logo span {
            background: linear-gradient(135deg, #00D4FF, #00B8E0);
            -webkit-background-clip: text;
            background-clip: text;
            -webkit-text-fill-color: transparent;
        }
        .site-footer .footer-brand p {
            font-size: 0.85rem;
            line-height: 1.7;
            margin-bottom: 20px;
            max-width: 360px;
        }
        .social-icons {
            display: flex;
            gap: 10px;
        }
        .social-icons a {
            width: 36px;
            height: 36px;
            border-radius: 50%;
            background: var(--bg-card);
            border: 1px solid rgba(0, 212, 255, 0.2);
            display: inline-flex;
            align-items: center;
            justify-content: center;
            color: var(--text-gray);
            font-size: 0.85rem;
            transition: all var(--transition);
        }
        .social-icons a:hover {
            background: var(--primary);
            color: #1A1A1A;
            border-color: var(--primary);
            transform: translateY(-2px);
            box-shadow: var(--shadow-glow);
        }
        .site-footer h4 {
            font-size: 1rem;
            font-weight: 600;
            color: var(--text-white);
            margin-bottom: 20px;
            position: relative;
            padding-bottom: 8px;
        }
        .site-footer h4::after {
            content: "";
            position: absolute;
            bottom: 0;
            left: 0;
            width: 24px;
            height: 2px;
            background: var(--primary);
            border-radius: 2px;
        }
        .footer-links {
            list-style: none;
            padding: 0;
            margin: 0;
        }
        .footer-links li {
            margin-bottom: 10px;
        }
        .footer-links a {
            color: var(--text-gray);
            font-size: 0.85rem;
            display: inline-flex;
            align-items: center;
            gap: 6px;
            transition: all var(--transition);
        }
        .footer-links a i {
            font-size: 0.7rem;
            color: var(--primary);
            transition: transform var(--transition);
        }
        .footer-links a:hover {
            color: var(--primary);
            transform: translateX(4px);
        }
        .footer-copy {
            font-size: 0.85rem;
            color: var(--text-muted);
            margin-bottom: 8px;
        }
        .footer-disclaimer {
            font-size: 0.78rem;
            color: var(--text-muted);
            line-height: 1.6;
            opacity: 0.7;
            margin-bottom: 0;
        }
        .footer-divider {
            border-color: rgba(255, 255, 255, 0.06);
            margin: 32px 0 20px;
        }
        .footer-bottom {
            text-align: center;
            font-size: 0.8rem;
            color: var(--text-muted);
        }

        /* ===== 响应式 ===== */
        @media (max-width: 991.98px) {
            body {
                padding-top: 64px;
            }
            .roulang-nav {
                height: 64px;
            }
            .roulang-nav .navbar-collapse {
                background: var(--bg-dark);
                border-radius: 0 0 var(--radius-lg) var(--radius-lg);
                padding: 16px;
                margin-top: 12px;
                border: 1px solid var(--border-glass);
                box-shadow: 0 16px 48px rgba(0, 0, 0, 0.5);
            }
            .roulang-nav .navbar-nav {
                gap: 4px;
                margin-bottom: 12px;
            }
            .btn-nav-cta {
                margin-left: 0;
                margin-top: 8px;
                width: 100%;
                justify-content: center;
            }
            .section-padding {
                padding: 56px 0;
            }
            .cat-banner {
                min-height: 340px;
                padding: 48px 0;
            }
        }
        @media (max-width: 767.98px) {
            .section-padding {
                padding: 48px 0;
            }
            .cat-banner {
                min-height: 300px;
            }
            .cat-banner h1 {
                font-size: 1.7rem;
            }
            .cta-section {
                padding: 56px 0;
            }
            .cta-section .btn-cta-large {
                width: 100%;
                max-width: 320px;
            }
            .process-step::after {
                display: none;
            }
            .sidebar-widget {
                margin-bottom: 16px;
            }
            .faq-accordion .accordion-body {
                margin-left: 12px;
                margin-right: 12px;
                padding-left: 14px;
            }
        }
        @media (max-width: 575.98px) {
            .cat-banner {
                min-height: 260px;
                padding: 32px 0;
            }
            .cat-banner h1 {
                font-size: 1.4rem;
            }
            .cat-banner .banner-sub {
                font-size: 0.9rem;
            }
            .section-head {
                margin-bottom: 32px;
            }
            .section-head h2 {
                font-size: 1.2rem;
            }
            .section-head h2::before {
                height: 16px;
            }
            .feature-card {
                padding: 24px 20px;
            }
            .scenario-card {
                padding: 20px;
            }
            .faq-accordion .accordion-button {
                font-size: 0.9rem;
                padding: 14px 14px;
            }
            .faq-accordion .accordion-body {
                font-size: 0.85rem;
            }
            .footer-bottom {
                font-size: 0.75rem;
            }
        }