/* roulang page: index */
:root {
  --bg-body: #0A1328;
  --bg-panel: #111F3C;
  --bg-card: rgba(17, 31, 60, 0.55);
  --accent-cyan: #3EE6FF;
  --accent-lime: #B7FF3B;
  --accent-amber: #FFB020;
  --text-primary: #F0F7FF;
  --text-secondary: #9DB2D0;
  --text-muted: #5C7291;
  --border-subtle: rgba(255, 255, 255, 0.08);
  --border-cyan: rgba(62, 230, 255, 0.35);
  --radius-card: 16px;
  --radius-btn: 50px;
  --radius-input: 14px;
  --shadow-card: 0 8px 30px rgba(0, 0, 0, 0.35);
  --shadow-cyan: 0 0 24px rgba(62, 230, 255, 0.22);
  --shadow-lime: 0 0 30px rgba(183, 255, 59, 0.22);
  --spacing-section: 88px;
  --bs-body-bg: #0A1328;
  --bs-body-color: #F0F7FF;
  --bs-body-font-family: 'Noto Sans SC', system-ui, -apple-system, sans-serif;
  --bs-primary: #3EE6FF;
  --bs-secondary: #9DB2D0;
  --bs-link-color: #3EE6FF;
  --bs-link-hover-color: #8beeff;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--bg-body);
  color: var(--text-primary);
  font-family: 'Noto Sans SC', system-ui, -apple-system, sans-serif;
  line-height: 1.8;
  font-size: 1rem;
  overflow-x: hidden;
}
body::before {
  content: '';
  position: fixed;
  inset: 0;
  background: radial-gradient(ellipse at 50% 0%, rgba(22, 41, 77, 0.55), transparent 60%);
  pointer-events: none;
  z-index: 0;
}
a { color: var(--accent-cyan); text-decoration: none; transition: color 0.2s; }
a:hover { color: #8beeff; }
img { max-width: 100%; height: auto; }
.container-xl { max-width: 1200px; padding-left: 12px; padding-right: 12px; margin: 0 auto; }
section { position: relative; z-index: 1; }
.row { --bs-gutter-x: 24px; --bs-gutter-y: 24px; }

/* ---------- Header / Nav ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 1050;
  background: rgba(10, 19, 40, 0.86);
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
  border-bottom: 1px solid var(--border-subtle);
}
.nav-container {
  display: flex;
  align-items: center;
  gap: 14px;
  min-height: 76px;
  padding: 10px 0;
  flex-wrap: nowrap;
}
.nav-left { flex: 0 0 auto; }
.nav-center { flex: 1 1 auto; width: auto; display: flex; flex-direction: column; justify-content: center; }
.nav-right { flex: 0 0 auto; display: flex; align-items: center; gap: 14px; }
.site-logo {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 1.25rem;
  font-weight: 900;
  color: var(--text-primary);
  letter-spacing: 0.02em;
  white-space: nowrap;
}
.site-logo:hover { color: var(--text-primary); }
.logo-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--accent-lime);
  box-shadow: 0 0 12px rgba(183, 255, 59, 0.6);
  flex-shrink: 0;
}
.logo-sub { font-size: 0.82rem; font-weight: 600; color: var(--text-secondary); letter-spacing: 0.08em; }
.search-box {
  display: flex;
  align-items: center;
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: 50px;
  height: 44px;
  padding: 0 18px;
  transition: all 0.25s;
  max-width: 100%;
}
.search-box:focus-within {
  border-color: rgba(62, 230, 255, 0.7);
  box-shadow: 0 0 0 4px rgba(62, 230, 255, 0.12);
}
.search-box i { color: var(--text-secondary); margin-right: 10px; font-size: 16px; flex-shrink: 0; }
.search-box input {
  border: none;
  background: transparent;
  box-shadow: none;
  padding: 0;
  font-size: 0.95rem;
  color: var(--text-primary);
  outline: none;
  width: 100%;
}
.search-box input::placeholder { color: var(--text-muted); }
.search-tags {
  display: flex;
  gap: 8px;
  margin-top: 8px;
  flex-wrap: wrap;
}
.search-tag {
  font-size: 0.82rem;
  color: var(--text-secondary);
  padding: 2px 12px;
  border-radius: 50px;
  border: 1px solid rgba(255, 255, 255, 0.1);
  transition: all 0.2s;
  white-space: nowrap;
}
.search-tag:hover { color: var(--accent-cyan); border-color: var(--border-cyan); background: rgba(62, 230, 255, 0.05); }
.nav-links { display: flex; align-items: center; gap: 6px; }
.nav-link-custom {
  color: var(--text-secondary);
  font-weight: 500;
  font-size: 0.95rem;
  padding: 8px 16px;
  border-radius: 50px;
  transition: all 0.2s;
}
.nav-link-custom:hover { color: var(--text-primary); background: rgba(255, 255, 255, 0.04); }
.nav-link-custom.active { color: var(--accent-cyan); background: rgba(62, 230, 255, 0.08); }
.btn-nav-login {
  background: transparent;
  color: var(--accent-cyan);
  border: 1px solid var(--border-cyan);
  border-radius: 50px;
  padding: 8px 22px;
  font-weight: 600;
  font-size: 0.9rem;
  transition: all 0.25s;
}
.btn-nav-login:hover { background: rgba(62, 230, 255, 0.08); color: var(--accent-cyan); box-shadow: var(--shadow-cyan); }
.navbar-toggler-custom {
  background: transparent;
  border: 1px solid rgba(255, 255, 255, 0.15);
  border-radius: 10px;
  color: var(--text-primary);
  padding: 6px 12px;
  font-size: 1.2rem;
}
.mobile-nav {
  background: rgba(10, 19, 40, 0.98);
  backdrop-filter: blur(18px);
  border-top: 1px solid var(--border-subtle);
  padding: 16px;
}
.mobile-nav .search-box { margin-bottom: 14px; }
.mobile-link {
  display: block;
  padding: 12px 14px;
  color: var(--text-secondary);
  border-radius: 8px;
  font-weight: 500;
  border-bottom: 1px solid rgba(255, 255, 255, 0.04);
}
.mobile-link:hover { color: var(--accent-cyan); background: rgba(62, 230, 255, 0.05); }
.mobile-link.active { color: var(--accent-cyan); }

/* ---------- Hero ---------- */
.hero-section {
  background: linear-gradient(180deg, rgba(10, 19, 40, 0.7), rgba(10, 19, 40, 0.92)), url('/assets/images/backpic/back-1.png') center/cover no-repeat;
  padding: 80px 0 100px;
  position: relative;
  overflow: hidden;
}
.hero-section::after {
  content: '';
  position: absolute;
  top: -160px;
  left: 50%;
  transform: translateX(-50%);
  width: 900px;
  height: 380px;
  background: radial-gradient(ellipse at center, rgba(22, 41, 77, 0.9), transparent 70%);
  pointer-events: none;
}
.hero-panel {
  position: relative;
  background:
    radial-gradient(ellipse at 15% 0%, rgba(62, 230, 255, 0.1), transparent 50%),
    radial-gradient(ellipse at 85% 100%, rgba(183, 255, 59, 0.06), transparent 50%),
    linear-gradient(135deg, rgba(17, 31, 60, 0.88), rgba(10, 19, 40, 0.92));
  backdrop-filter: blur(16px);
  border: 1px solid var(--border-subtle);
  border-radius: 24px;
  padding: 56px 40px;
  overflow: hidden;
}
.hero-panel::before {
  content: '';
  position: absolute;
  top: 0;
  left: -10%;
  width: 120%;
  height: 4px;
  background: linear-gradient(120deg, transparent 0%, var(--accent-cyan) 40%, var(--accent-lime) 80%, transparent 100%);
  transform: skewX(-20deg);
}
.hero-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 0.85rem;
  color: var(--accent-cyan);
  background: rgba(62, 230, 255, 0.08);
  border: 1px solid rgba(62, 230, 255, 0.2);
  border-radius: 50px;
  padding: 4px 16px;
  margin-bottom: 16px;
  letter-spacing: 0.05em;
}
.hero-title {
  font-size: clamp(2.2rem, 4vw, 3.4rem);
  font-weight: 900;
  color: var(--text-primary);
  letter-spacing: 0.02em;
  line-height: 1.3;
  margin-bottom: 16px;
}
.hero-title .text-cyan { color: var(--accent-cyan); }
.hero-subtitle {
  color: #A8D8FF;
  font-size: 1.1rem;
  font-weight: 400;
  max-width: 640px;
  margin-bottom: 28px;
  line-height: 1.8;
}
.hero-actions { display: flex; gap: 16px; flex-wrap: wrap; margin-bottom: 24px; }
.btn-primary-main {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: var(--accent-lime);
  color: var(--bg-body);
  border-radius: 50px;
  padding: 14px 36px;
  font-weight: 700;
  border: none;
  transition: all 0.3s;
  box-shadow: var(--shadow-lime);
  font-size: 1rem;
}
.btn-primary-main:hover { background: #c9ff6a; color: var(--bg-body); transform: translateY(-2px); box-shadow: 0 0 42px rgba(183, 255, 59, 0.38); }
.btn-primary-main:active { transform: translateY(0); box-shadow: 0 0 20px rgba(183, 255, 59, 0.2); }
.btn-secondary-outline {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: transparent;
  color: var(--accent-cyan);
  border: 1px solid var(--border-cyan);
  border-radius: 50px;
  padding: 14px 36px;
  font-weight: 600;
  transition: all 0.3s;
  font-size: 1rem;
}
.btn-secondary-outline:hover { background: rgba(62, 230, 255, 0.08); color: var(--accent-cyan); transform: translateY(-2px); box-shadow: var(--shadow-cyan); }
.btn-secondary-outline:active { transform: translateY(0); }
.hero-badges { display: flex; gap: 12px; flex-wrap: wrap; }
.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 0.88rem;
  color: var(--text-secondary);
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--border-subtle);
  border-radius: 50px;
  padding: 6px 16px;
}
.hero-badge i { color: var(--accent-lime); }

/* ---------- Value Section ---------- */
.value-section { padding: var(--spacing-section) 0; }
.section-label {
  display: inline-block;
  font-size: 0.82rem;
  color: var(--accent-cyan);
  background: rgba(62, 230, 255, 0.08);
  border-radius: 50px;
  padding: 4px 14px;
  margin-bottom: 12px;
  letter-spacing: 0.08em;
}
.section-title {
  font-size: 1.9rem;
  font-weight: 900;
  color: var(--text-primary);
  margin-bottom: 12px;
  letter-spacing: 0.02em;
}
.section-subtitle { color: var(--text-secondary); max-width: 640px; margin-bottom: 40px; }
.value-grid {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 48px;
  align-items: center;
}
.value-list { display: flex; flex-direction: column; gap: 20px; }
.value-item {
  display: flex;
  gap: 16px;
  align-items: flex-start;
  padding: 18px;
  border-radius: var(--radius-card);
  border: 1px solid var(--border-subtle);
  background: rgba(17, 31, 60, 0.35);
  transition: all 0.25s;
}
.value-item:hover { border-color: var(--border-cyan); background: rgba(17, 31, 60, 0.55); box-shadow: var(--shadow-cyan); }
.value-icon {
  width: 46px;
  height: 46px;
  border-radius: 12px;
  background: rgba(62, 230, 255, 0.1);
  color: var(--accent-cyan);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.3rem;
  flex-shrink: 0;
}
.value-item h3 { font-size: 1.05rem; font-weight: 600; margin-bottom: 4px; }
.value-item p { color: var(--text-secondary); font-size: 0.92rem; margin: 0; }
.data-band {
  background: linear-gradient(135deg, rgba(62, 230, 255, 0.08), rgba(183, 255, 59, 0.05));
  border: 1px solid var(--border-subtle);
  border-radius: 20px;
  padding: 32px;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 32px 24px;
}
.data-item { text-align: center; }
.data-number {
  font-size: 2.2rem;
  font-weight: 900;
  color: var(--accent-lime);
  font-variant-numeric: tabular-nums;
  line-height: 1.2;
}
.data-label { color: var(--text-secondary); font-size: 0.9rem; margin-top: 6px; }

/* ---------- Showcase Carousel ---------- */
.showcase-section {
  padding: var(--spacing-section) 0;
  background: rgba(17, 31, 60, 0.18);
  border-top: 1px solid var(--border-subtle);
  border-bottom: 1px solid var(--border-subtle);
}
.showcase-carousel {
  position: relative;
  border-radius: 20px;
  overflow: hidden;
  border: 1px solid var(--border-subtle);
  background: rgba(17, 31, 60, 0.55);
  backdrop-filter: blur(14px);
  max-width: 900px;
  margin: 0 auto;
}
.carousel-item { padding: 24px; }
.showcase-slide { text-align: center; }
.showcase-img {
  border-radius: 12px;
  overflow: hidden;
  border: 1px solid rgba(255, 255, 255, 0.1);
  box-shadow: 0 10px 40px rgba(0, 0, 0, 0.4);
  margin-bottom: 20px;
}
.showcase-img img { width: 100%; height: auto; aspect-ratio: 16/10; object-fit: cover; display: block; }
.showcase-caption { color: var(--text-secondary); font-size: 1rem; padding: 0 20px 8px; }
.carousel-control-prev,
.carousel-control-next {
  width: 52px;
  height: 52px;
  top: 50%;
  transform: translateY(-50%);
  background: rgba(17, 31, 60, 0.85);
  border: 1px solid var(--border-cyan);
  border-radius: 50%;
  opacity: 1;
  box-shadow: var(--shadow-cyan);
  transition: all 0.25s;
}
.carousel-control-prev:hover, .carousel-control-next:hover { background: rgba(62, 230, 255, 0.15); transform: translateY(-50%) scale(1.05); box-shadow: 0 0 35px rgba(62, 230, 255, 0.35); }
.carousel-control-prev { left: 14px; }
.carousel-control-next { right: 14px; }
.carousel-control-prev-icon, .carousel-control-next-icon { filter: none; }
.carousel-indicators { margin-bottom: 10px; }
.carousel-indicators [data-bs-target] {
  width: 26px;
  height: 4px;
  border-radius: 4px;
  background: rgba(255, 255, 255, 0.2);
  border: none;
  transition: all 0.3s;
}
.carousel-indicators .active { background: var(--accent-cyan); width: 38px; }

/* ---------- System Section ---------- */
.system-section { padding: var(--spacing-section) 0; }
.system-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  margin-top: 20px;
}
.system-card {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-card);
  padding: 32px 24px;
  text-align: center;
  backdrop-filter: blur(14px);
  transition: all 0.25s;
}
.system-card:hover { border-color: var(--border-cyan); transform: translateY(-4px); box-shadow: var(--shadow-cyan); }
.system-icon {
  width: 60px;
  height: 60px;
  border-radius: 18px;
  background: rgba(62, 230, 255, 0.1);
  color: var(--accent-cyan);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.8rem;
  margin: 0 auto 18px;
}
.system-card h3 { font-size: 1.2rem; font-weight: 600; }
.system-card p { color: var(--text-secondary); font-size: 0.9rem; margin-bottom: 0; }

/* ---------- Reviews ---------- */
.reviews-section { padding: var(--spacing-section) 0; background: rgba(17, 31, 60, 0.12); border-top: 1px solid var(--border-subtle); border-bottom: 1px solid var(--border-subtle); }
.reviews-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 24px; margin-top: 20px; }
.review-card {
  background: rgba(17, 31, 60, 0.55);
  border: 1px solid rgba(62, 230, 255, 0.18);
  border-radius: var(--radius-card);
  padding: 28px;
  box-shadow: 0 0 24px rgba(62, 230, 255, 0.08);
  transition: all 0.25s;
  backdrop-filter: blur(14px);
}
.review-card:hover { box-shadow: 0 0 32px rgba(62, 230, 255, 0.15); transform: translateY(-2px); }
.review-stars { color: var(--accent-amber); font-size: 1rem; margin-bottom: 12px; }
.review-text { color: var(--text-secondary); font-size: 0.95rem; line-height: 1.8; margin-bottom: 16px; }
.review-author { color: var(--text-muted); font-size: 0.85rem; font-weight: 500; }

/* ---------- Download ---------- */
.download-section { padding: var(--spacing-section) 0; }
.download-btns { display: flex; gap: 18px; justify-content: center; flex-wrap: wrap; margin-top: 24px; }
.btn-download {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 14px 32px;
  border-radius: 50px;
  font-weight: 600;
  font-size: 1rem;
  transition: all 0.25s;
}
.btn-download i { font-size: 1.2rem; }
.btn-download-lime { background: var(--accent-lime); color: var(--bg-body); box-shadow: var(--shadow-lime); border: none; }
.btn-download-lime:hover { background: #c9ff6a; color: var(--bg-body); transform: translateY(-2px); box-shadow: 0 0 42px rgba(183, 255, 59, 0.38); }
.btn-download-cyan { background: transparent; color: var(--accent-cyan); border: 1px solid var(--border-cyan); }
.btn-download-cyan:hover { background: rgba(62, 230, 255, 0.08); color: var(--accent-cyan); transform: translateY(-2px); box-shadow: var(--shadow-cyan); }
.download-note { text-align: center; color: var(--text-muted); font-size: 0.82rem; margin-top: 18px; }

/* ---------- News Section ---------- */
.news-section { padding: var(--spacing-section) 0; background: rgba(17, 31, 60, 0.12); border-top: 1px solid var(--border-subtle); border-bottom: 1px solid var(--border-subtle); }
.news-list { display: flex; flex-direction: column; gap: 20px; margin-top: 24px; }
.news-card {
  display: flex;
  gap: 20px;
  align-items: center;
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-card);
  padding: 16px;
  transition: all 0.25s;
  backdrop-filter: blur(14px);
}
.news-card:hover { background: rgba(17, 31, 60, 0.72); border-color: var(--border-cyan); box-shadow: var(--shadow-cyan); transform: translateY(-2px); }
.news-card-thumb { width: 180px; flex-shrink: 0; border-radius: 12px; overflow: hidden; }
.news-card-thumb img { width: 100%; aspect-ratio: 16/10; object-fit: cover; display: block; }
.news-card-body { flex: 1; min-width: 0; }
.news-card-meta { display: flex; gap: 12px; align-items: center; margin-bottom: 6px; }
.news-card-meta time { color: var(--text-muted); font-size: 0.82rem; }
.badge-tag {
  display: inline-block;
  background: rgba(62, 230, 255, 0.1);
  color: var(--accent-cyan);
  font-size: 0.78rem;
  padding: 2px 12px;
  border-radius: 50px;
  font-weight: 500;
}
.news-card-title { font-size: 1.1rem; font-weight: 600; margin-bottom: 6px; line-height: 1.5; }
.news-card-title a { color: var(--text-primary); }
.news-card-title a:hover { color: var(--accent-cyan); }
.news-card-excerpt {
  color: var(--text-secondary);
  font-size: 0.9rem;
  margin-bottom: 10px;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.news-card-more { font-size: 0.85rem; color: var(--accent-cyan); display: inline-flex; align-items: center; gap: 4px; transition: all 0.2s; }
.news-card-more:hover { gap: 8px; color: #8beeff; }
.news-empty {
  min-height: 180px;
  border: 2px dashed rgba(255, 255, 255, 0.12);
  border-radius: var(--radius-card);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 10px;
  color: var(--text-muted);
  font-size: 0.95rem;
}
.news-empty i { font-size: 2rem; opacity: 0.5; }

/* ---------- FAQ ---------- */
.faq-section { padding: var(--spacing-section) 0; }
.accordion-custom { margin-top: 24px; max-width: 860px; margin-left: auto; margin-right: auto; }
.accordion-item {
  background: rgba(255, 255, 255, 0.02);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-card) !important;
  margin-bottom: 16px;
  overflow: hidden;
  transition: all 0.2s;
}
.accordion-item:hover { border-color: rgba(255, 255, 255, 0.12); }
.accordion-button {
  background: transparent;
  color: var(--text-primary);
  font-weight: 600;
  padding: 18px 22px;
  font-size: 1rem;
  border: none;
  transition: all 0.2s;
}
.accordion-button:not(.collapsed) { background: rgba(62, 230, 255, 0.06); color: var(--accent-cyan); box-shadow: none; }
.accordion-button:focus { outline: none; box-shadow: 0 0 0 3px rgba(62, 230, 255, 0.12); }
.accordion-button::after {
  content: '';
  width: 24px;
  height: 24px;
  border-radius: 50%;
  border: 1px solid var(--border-cyan);
  background: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='14' height='14' viewBox='0 0 24 24' fill='none' stroke='%233EE6FF' stroke-width='2.5' stroke-linecap='round'%3E%3Cline x1='12' y1='5' x2='12' y2='19'/%3E%3Cline x1='5' y1='12' x2='19' y2='12'/%3E%3C/svg%3E") center/12px no-repeat;
  transition: transform 0.3s;
}
.accordion-button:not(.collapsed)::after { transform: rotate(45deg); }
.accordion-body { color: var(--text-secondary); line-height: 1.8; padding: 0 22px 20px; font-size: 0.95rem; }

/* ---------- CTA ---------- */
.cta-section { padding: 64px 0 96px; }
.cta-panel {
  background: linear-gradient(135deg, rgba(17, 31, 60, 0.85), rgba(10, 19, 40, 0.92)), url('/assets/images/backpic/back-2.png') center/cover no-repeat;
  border: 1px solid var(--border-subtle);
  border-radius: 24px;
  padding: 56px 40px;
  text-align: center;
  position: relative;
  overflow: hidden;
}
.cta-panel::before {
  content: '';
  position: absolute;
  top: -50px;
  left: 10%;
  width: 80%;
  height: 120px;
  background: radial-gradient(ellipse, rgba(62, 230, 255, 0.12), transparent 70%);
}
.cta-panel h2 { font-size: 2rem; font-weight: 900; margin-bottom: 12px; }
.cta-panel p { color: var(--text-secondary); max-width: 540px; margin: 0 auto 28px; }

/* ---------- Footer ---------- */
.site-footer {
  background: rgba(8, 15, 32, 0.95);
  border-top: 1px solid var(--border-subtle);
  padding: 64px 0 28px;
  position: relative;
  z-index: 1;
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr 1fr;
  gap: 40px;
  margin-bottom: 40px;
}
.footer-brand .site-logo { font-size: 1.4rem; }
.footer-desc { color: var(--text-secondary); font-size: 0.9rem; margin-top: 14px; max-width: 320px; }
.footer-title { font-size: 1rem; font-weight: 600; margin-bottom: 14px; }
.footer-links { list-style: none; padding: 0; margin: 0; }
.footer-links li { margin-bottom: 8px; }
.footer-links a { color: var(--text-secondary); font-size: 0.9rem; transition: all 0.2s; display: inline-flex; align-items: center; gap: 6px; }
.footer-links a:hover { color: var(--accent-cyan); transform: translateX(4px); }
.footer-contact { color: var(--text-secondary); font-size: 0.88rem; line-height: 2; }
.footer-contact i { color: var(--accent-cyan); margin-right: 6px; width: 16px; }
.footer-bottom {
  border-top: 1px solid var(--border-subtle);
  padding-top: 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 10px;
  color: var(--text-muted);
  font-size: 0.82rem;
}

/* ---------- Focus Accessibility ---------- */
a:focus-visible, button:focus-visible, input:focus-visible, .accordion-button:focus-visible {
  outline: 2px solid var(--accent-cyan);
  outline-offset: 2px;
  border-radius: 4px;
}

/* ---------- Responsive ---------- */
@media (max-width: 991.98px) {
  .nav-container { min-height: 66px; }
  .nav-right { gap: 8px; }
  .nav-links { display: none !important; }
  .hero-section { padding: 56px 0 64px; }
  .hero-panel { padding: 40px 28px; }
  .value-grid { grid-template-columns: 1fr; gap: 32px; }
  .system-grid { grid-template-columns: 1fr; gap: 20px; }
  .reviews-grid { grid-template-columns: 1fr; }
  .download-btns { flex-direction: column; align-items: center; }
  .btn-download { width: 100%; max-width: 340px; justify-content: center; }
  .news-card-thumb { width: 140px; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .showcase-carousel { max-width: 100%; }
  .carousel-control-prev { left: 4px; }
  .carousel-control-next { right: 4px; }
}
@media (max-width: 767.98px) {
  :root { --spacing-section: 48px; }
  .hero-panel { padding: 32px 20px; border-radius: 18px; }
  .hero-title { font-size: 1.8rem; }
  .hero-actions { flex-direction: column; }
  .hero-actions .btn { width: 100%; }
  .data-band { grid-template-columns: 1fr 1fr; padding: 24px 16px; gap: 24px 16px; }
  .data-number { font-size: 1.7rem; }
  .section-title { font-size: 1.5rem; }
  .news-card { flex-direction: column; align-items: flex-start; }
  .news-card-thumb { width: 100%; }
  .carousel-item { padding: 12px; }
  .showcase-caption { font-size: 0.88rem; padding: 0 10px; }
  .cta-panel { padding: 40px 20px; }
  .cta-panel h2 { font-size: 1.5rem; }
  .footer-grid { grid-template-columns: 1fr; gap: 32px; }
  .footer-bottom { flex-direction: column; text-align: center; }
  .search-tags { display: none; }
  .nav-center { display: none; }
}
@media (max-width: 575.98px) {
  .nav-container { gap: 10px; }
  .site-logo { font-size: 1.05rem; }
  .nav-links { display: none; }
  .hero-badges { flex-direction: column; align-items: flex-start; }
  .value-item { padding: 14px; }
  .reviews-grid { grid-template-columns: 1fr; }
  .review-card { padding: 20px; }
  .showcase-carousel .carousel-control-prev,
  .showcase-carousel .carousel-control-next { display: none; }
  .carousel-indicators { margin-bottom: 0; }
}

/* roulang page: article */
:root {
  --bg-primary: #0A1328;
  --bg-surface: #111F3C;
  --bg-card: rgba(17,31,60,0.55);
  --bg-glass: rgba(17,31,60,0.65);
  --accent-cyan: #3EE6FF;
  --accent-lime: #B7FF3B;
  --warning-amber: #FFB020;
  --text-primary: #F0F7FF;
  --text-secondary: #9DB2D0;
  --text-muted: #5C7291;
  --border-light: rgba(255,255,255,0.08);
  --border-cyan: rgba(62,230,255,0.35);
  --radius-card: 16px;
  --radius-pill: 50px;
  --radius-input: 14px;
  --radius-img: 12px;
  --shadow-card: 0 8px 30px rgba(0,0,0,0.35);
  --shadow-cyan: 0 0 24px rgba(62,230,255,0.22);
  --shadow-lime: 0 0 30px rgba(183,255,59,0.22);
  --font-main: 'Noto Sans SC', -apple-system, 'PingFang SC', 'Microsoft YaHei', sans-serif;
}

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

body {
  font-family: var(--font-main);
  background: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.8;
  -webkit-font-smoothing: antialiased;
}

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

img {
  max-width: 100%;
}

ul,
ol {
  list-style: none;
}

button,
input {
  font-family: inherit;
}

.container-xl {
  max-width: 1200px;
  padding: 0 12px;
  margin: 0 auto;
}

/* ===== Header 搜索主导航 ===== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: rgba(10,19,40,0.88);
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
  border-bottom: 1px solid rgba(255,255,255,0.06);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  min-height: 72px;
  padding: 12px;
}

.site-logo {
  display: inline-flex;
  align-items: center;
  font-size: 1.35rem;
  font-weight: 900;
  color: #fff;
  letter-spacing: 0.02em;
  white-space: nowrap;
}

.logo-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--accent-lime);
  margin-right: 8px;
  box-shadow: 0 0 12px rgba(183,255,59,0.6);
}

.logo-sub {
  color: var(--accent-cyan);
  margin-left: 2px;
}

.header-search {
  flex: 1;
  max-width: 560px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.search-box {
  display: flex;
  align-items: center;
  height: 44px;
  background: rgba(255,255,255,0.06);
  border: 1px solid rgba(255,255,255,0.12);
  border-radius: 50px;
  padding: 0 18px;
  transition: border-color .2s, box-shadow .2s;
}

.search-box:focus-within {
  border-color: rgba(62,230,255,0.7);
  box-shadow: 0 0 20px rgba(62,230,255,0.15);
}

.search-box i {
  color: var(--text-muted);
  margin-right: 10px;
  font-size: 1rem;
}

.search-box input {
  flex: 1;
  background: transparent;
  border: none;
  outline: none;
  color: var(--text-primary);
  font-size: 0.95rem;
}

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

.search-tags {
  display: flex;
  gap: 8px;
  padding-left: 8px;
}

.search-tag {
  display: inline-block;
  font-size: 0.8rem;
  color: var(--text-secondary);
  background: rgba(255,255,255,0.04);
  border: 1px solid rgba(255,255,255,0.08);
  border-radius: 50px;
  padding: 2px 12px;
  transition: all .2s;
}

.search-tag:hover {
  color: var(--accent-cyan);
  border-color: var(--accent-cyan);
  background: rgba(62,230,255,0.08);
}

.header-right {
  display: flex;
  align-items: center;
  gap: 14px;
  flex-shrink: 0;
}

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

.nav-link-custom {
  display: inline-block;
  font-size: 0.92rem;
  font-weight: 500;
  color: var(--text-secondary);
  padding: 6px 16px;
  border-radius: 50px;
  transition: all .2s;
}

.nav-link-custom:hover {
  color: var(--accent-cyan);
  background: rgba(62,230,255,0.08);
}

.nav-link-custom.active {
  color: var(--accent-cyan);
  background: rgba(62,230,255,0.12);
  font-weight: 600;
}

.btn-header-login {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  height: 38px;
  padding: 0 22px;
  border-radius: 50px;
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--bg-primary);
  background: var(--accent-lime);
  border: none;
  transition: all .2s;
  white-space: nowrap;
}

.btn-header-login:hover {
  filter: brightness(1.1);
  box-shadow: 0 0 30px rgba(183,255,59,0.25);
  color: var(--bg-primary);
}

.navbar-toggler {
  background: rgba(255,255,255,0.08);
  border: 1px solid rgba(255,255,255,0.12);
  border-radius: 10px;
  color: var(--text-primary);
  padding: 6px 10px;
  line-height: 1;
}

.navbar-toggler:focus {
  box-shadow: none;
  border-color: var(--accent-cyan);
}

.navbar-toggler i {
  font-size: 1.2rem;
}

.mobile-panel {
  background: var(--bg-surface);
  border-top: 1px solid rgba(255,255,255,0.06);
  padding: 16px 20px;
}

.mobile-search {
  display: flex;
  align-items: center;
  height: 44px;
  background: rgba(255,255,255,0.06);
  border: 1px solid rgba(255,255,255,0.12);
  border-radius: 50px;
  padding: 0 16px;
  margin-bottom: 14px;
}

.mobile-search i {
  color: var(--text-muted);
  margin-right: 10px;
}

.mobile-search input {
  flex: 1;
  background: transparent;
  border: none;
  outline: none;
  color: var(--text-primary);
}

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

.mobile-nav-links {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.mobile-nav-links .nav-link-custom {
  padding: 10px 14px;
  border-radius: 12px;
  font-size: 1rem;
}

/* ===== 面包屑 ===== */
.breadcrumb-section {
  padding: 28px 0 4px;
}

.breadcrumb-pill {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(255,255,255,0.04);
  border: 1px solid rgba(255,255,255,0.08);
  border-radius: 50px;
  padding: 8px 18px;
  font-size: 0.9rem;
  color: var(--text-secondary);
  max-width: 100%;
  overflow: hidden;
  white-space: nowrap;
}

.breadcrumb-pill a {
  color: var(--text-secondary);
  transition: color .2s;
  flex-shrink: 0;
}

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

.breadcrumb-pill i {
  font-size: 0.7rem;
  color: var(--text-muted);
  flex-shrink: 0;
}

.breadcrumb-pill .current {
  color: var(--accent-cyan);
  font-weight: 500;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  min-width: 0;
  max-width: 300px;
}

/* ===== 文章头部 ===== */
.article-header-section {
  position: relative;
  padding: 72px 0 48px;
  background: url('/assets/images/backpic/back-2.png') center / cover no-repeat;
}

.article-header-section::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(10,19,40,0.82) 0%, rgba(10,19,40,0.96) 100%);
  z-index: 1;
}

.article-header-section::after {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: linear-gradient(135deg, var(--accent-cyan), var(--accent-lime));
  z-index: 2;
}

.article-header-inner {
  position: relative;
  z-index: 2;
  max-width: 860px;
  margin: 0 auto;
  text-align: center;
}

.article-header-inner h1 {
  font-size: clamp(1.8rem, 4vw, 2.8rem);
  font-weight: 900;
  line-height: 1.35;
  letter-spacing: 0.02em;
  color: #fff;
  margin-bottom: 24px;
}

.article-meta-bar {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 12px;
}

.meta-item {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 0.88rem;
  color: var(--text-secondary);
  background: rgba(255,255,255,0.06);
  border: 1px solid rgba(255,255,255,0.08);
  border-radius: 50px;
  padding: 5px 14px;
}

.meta-item i {
  color: var(--accent-cyan);
}

/* ===== 正文 ===== */
.article-content-section {
  padding: 48px 0 80px;
}

.article-body {
  max-width: 780px;
  margin: 0 auto;
  font-size: 17px;
  line-height: 1.9;
  color: var(--text-primary);
}

.article-body p {
  margin-bottom: 1.35em;
  color: #C8D8F0;
}

.article-body h2 {
  font-size: 1.8rem;
  font-weight: 700;
  margin: 2.2em 0 0.8em;
  color: #fff;
  letter-spacing: 0.02em;
  padding-bottom: 0.4em;
  border-bottom: 1px solid rgba(255,255,255,0.08);
}

.article-body h3 {
  font-size: 1.2rem;
  font-weight: 600;
  margin: 1.8em 0 0.6em;
  color: var(--accent-cyan);
}

.article-body blockquote {
  border-left: 4px solid var(--accent-cyan);
  background: rgba(62,230,255,0.06);
  padding: 18px 22px;
  border-radius: 0 14px 14px 0;
  margin: 1.6em 0;
  color: #A8D8FF;
}

.article-body blockquote p:last-child {
  margin-bottom: 0;
}

.article-body img {
  max-width: 100%;
  border-radius: 12px;
  box-shadow: var(--shadow-card);
  margin: 1.6em auto;
  display: block;
}

.article-body ul,
.article-body ol {
  padding-left: 1.4em;
  margin: 1.4em 0;
  color: #C8D8F0;
}

.article-body ul li,
.article-body ol li {
  margin-bottom: 0.6em;
}

.article-body ul li::marker {
  color: var(--accent-cyan);
}

.article-body ol li::marker {
  color: var(--accent-lime);
  font-weight: 600;
}

.article-body a {
  color: var(--accent-cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(62,230,255,0.3);
}

.article-body a:hover {
  color: #7df1ff;
  border-bottom-color: var(--accent-cyan);
}

.article-body code {
  background: rgba(62,230,255,0.1);
  color: var(--accent-cyan);
  border-radius: 6px;
  padding: 2px 8px;
  font-size: 0.9em;
}

.article-body pre {
  background: #0a1120;
  border: 1px solid rgba(255,255,255,0.08);
  border-radius: 14px;
  padding: 20px;
  overflow-x: auto;
  margin: 1.6em 0;
}

.article-body table {
  width: 100%;
  border-collapse: collapse;
  margin: 1.6em 0;
  font-size: 0.95rem;
}

.article-body th,
.article-body td {
  border: 1px solid rgba(255,255,255,0.1);
  padding: 12px 16px;
  text-align: left;
}

.article-body th {
  background: rgba(62,230,255,0.08);
  color: var(--accent-cyan);
  font-weight: 600;
}

/* ===== 相关推荐 ===== */
.related-section {
  padding: 0 0 80px;
}

.section-title {
  font-size: 1.8rem;
  font-weight: 700;
  color: #fff;
  letter-spacing: 0.02em;
  margin-bottom: 32px;
  position: relative;
  padding-left: 16px;
}

.section-title::before {
  content: '';
  position: absolute;
  left: 0;
  top: 50%;
  transform: translateY(-50%);
  width: 4px;
  height: 24px;
  border-radius: 4px;
  background: var(--accent-lime);
  box-shadow: 0 0 12px rgba(183,255,59,0.5);
}

.related-card {
  display: flex;
  flex-direction: column;
  background: var(--bg-card);
  border: 1px solid rgba(255,255,255,0.08);
  border-radius: 16px;
  overflow: hidden;
  height: 100%;
  backdrop-filter: blur(14px);
  transition: all .3s ease;
}

.related-card:hover {
  background: rgba(21, 37, 70, 0.65);
  border-color: var(--border-cyan);
  box-shadow: var(--shadow-cyan);
  transform: translateY(-4px);
}

.related-card .card-thumb {
  width: 100%;
  height: 180px;
  object-fit: cover;
  display: block;
}

.related-card .card-body {
  padding: 18px 20px 20px;
  display: flex;
  flex-direction: column;
  flex: 1;
}

.related-card .card-title {
  font-size: 1.05rem;
  font-weight: 600;
  color: #fff;
  line-height: 1.5;
  margin-bottom: 10px;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.related-card .card-text {
  font-size: 0.9rem;
  color: var(--text-secondary);
  line-height: 1.7;
  margin-bottom: 14px;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.related-card .card-meta {
  margin-top: auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 0.82rem;
  color: var(--text-muted);
}

.related-card .card-meta i {
  transition: transform .2s;
  color: var(--accent-cyan);
}

.related-card:hover .card-meta i {
  transform: translateX(4px);
}

/* ===== 返回按钮 ===== */
.article-action-section {
  padding: 0 0 88px;
}

.article-action-inner {
  display: flex;
  justify-content: center;
  gap: 16px;
  flex-wrap: wrap;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  height: 46px;
  padding: 0 30px;
  border-radius: 50px;
  font-size: 0.95rem;
  font-weight: 600;
  transition: all .25s ease;
  border: 1px solid transparent;
}

.btn-primary-cyber {
  background: var(--accent-lime);
  color: var(--bg-primary);
  box-shadow: var(--shadow-lime);
}

.btn-primary-cyber:hover {
  filter: brightness(1.1);
  box-shadow: 0 0 36px rgba(183,255,59,0.32);
  color: var(--bg-primary);
  transform: translateY(-2px);
}

.btn-outline-cyber {
  background: transparent;
  color: var(--accent-cyan);
  border: 1px solid rgba(62,230,255,0.5);
}

.btn-outline-cyber:hover {
  background: rgba(62,230,255,0.08);
  border-color: var(--accent-cyan);
  box-shadow: var(--shadow-cyan);
  color: var(--accent-cyan);
  transform: translateY(-2px);
}

.btn:focus-visible {
  outline: 2px solid var(--accent-cyan);
  outline-offset: 2px;
}

/* ===== 无文提示 ===== */
.article-not-found {
  min-height: 60vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 80px 20px;
}

.not-found-card {
  text-align: center;
  background: var(--bg-card);
  border: 1px dashed rgba(255,255,255,0.2);
  border-radius: 20px;
  padding: 48px 40px;
  max-width: 480px;
  width: 100%;
  backdrop-filter: blur(14px);
}

.not-found-card i {
  font-size: 3rem;
  color: var(--text-muted);
  margin-bottom: 16px;
}

.not-found-card h2 {
  font-size: 1.6rem;
  font-weight: 700;
  color: #fff;
  margin-bottom: 12px;
}

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

/* ===== Footer ===== */
.site-footer {
  background: #0A1020;
  border-top: 1px solid rgba(255,255,255,0.06);
  padding: 60px 0 0;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1.5fr;
  gap: 48px;
  padding-bottom: 48px;
}

.footer-brand .site-logo {
  margin-bottom: 16px;
}

.footer-desc {
  font-size: 0.9rem;
  color: var(--text-secondary);
  margin-top: 12px;
  line-height: 1.8;
}

.footer-title {
  font-size: 1rem;
  font-weight: 600;
  color: #fff;
  margin-bottom: 18px;
}

.footer-links li {
  margin-bottom: 10px;
}

.footer-links a {
  color: var(--text-secondary);
  font-size: 0.9rem;
  transition: all .2s;
}

.footer-links a i {
  font-size: 0.7rem;
  margin-right: 4px;
  color: var(--accent-cyan);
}

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

.footer-contact div {
  color: var(--text-secondary);
  font-size: 0.9rem;
  margin-bottom: 12px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.footer-contact i {
  color: var(--accent-cyan);
  font-size: 0.95rem;
}

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

.footer-contact a:hover {
  color: var(--accent-cyan);
}

.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.06);
  padding: 20px 0;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px;
  font-size: 0.82rem;
  color: var(--text-muted);
}

/* ===== 响应式 ===== */
@media (max-width: 991.98px) {
  .header-search {
    display: none !important;
  }

  .header-inner {
    min-height: 64px;
  }

  .btn-header-login {
    height: 34px;
    padding: 0 16px;
    font-size: 0.84rem;
  }
}

@media (max-width: 767.98px) {
  .article-header-section {
    padding: 48px 0 28px;
  }

  .article-content-section {
    padding: 32px 0 48px;
  }

  .related-section {
    padding-bottom: 48px;
  }

  .article-action-section {
    padding-bottom: 56px;
  }

  .article-meta-bar {
    gap: 8px;
  }

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

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

  .section-title {
    font-size: 1.5rem;
    margin-bottom: 24px;
  }

  .breadcrumb-pill {
    max-width: 100%;
    overflow-x: auto;
    white-space: nowrap;
    -webkit-overflow-scrolling: touch;
  }

  .breadcrumb-pill::-webkit-scrollbar {
    display: none;
  }
}

@media (max-width: 575.98px) {
  .article-action-inner {
    flex-direction: column;
    align-items: stretch;
  }

  .article-action-inner .btn {
    width: 100%;
  }

  .article-body {
    font-size: 16px;
    line-height: 1.85;
  }

  .meta-item {
    font-size: 0.8rem;
    padding: 4px 10px;
  }

  .related-card .card-thumb {
    height: 150px;
  }

  .not-found-card {
    padding: 36px 24px;
  }

  .site-logo {
    font-size: 1.15rem;
  }
}

/* roulang page: category1 */
:root {
            --bg-base: #0A1328;
            --bg-panel: #111F3C;
            --bg-panel-hover: rgba(23, 41, 77, 0.7);
            --accent: #3EE6FF;
            --energy: #B7FF3B;
            --rating: #FFB020;
            --text-main: #F0F7FF;
            --text-sub: #9DB2D0;
            --text-weak: #5C7291;
            --border: rgba(255, 255, 255, 0.08);
            --border-accent: rgba(62, 230, 255, 0.35);
            --radius-card: 16px;
            --radius-btn: 50px;
            --radius-input: 14px;
            --radius-pill: 50px;
            --shadow-card: 0 8px 30px rgba(0, 0, 0, 0.35);
            --shadow-accent: 0 0 24px rgba(62, 230, 255, 0.22);
            --shadow-energy: 0 0 30px rgba(183, 255, 59, 0.22);
            --font: 'Noto Sans SC', system-ui, -apple-system, 'PingFang SC', 'Microsoft YaHei', sans-serif;
        }

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

        html {
            scroll-behavior: smooth;
        }

        body {
            margin: 0;
            font-family: var(--font);
            font-size: 1rem;
            font-weight: 400;
            line-height: 1.8;
            color: var(--text-main);
            background-color: var(--bg-base);
            -webkit-font-smoothing: antialiased;
            overflow-x: hidden;
        }

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

        a {
            transition: color 0.2s ease;
        }

        .container-xl {
            max-width: 1200px;
            padding-left: 12px;
            padding-right: 12px;
        }

        /* ========== 按钮 ========== */
        .btn {
            --bs-btn-font-weight: 600;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            border-radius: var(--radius-btn);
            padding: 11px 28px;
            font-size: 0.95rem;
            line-height: 1.4;
            text-decoration: none;
            border: 1px solid transparent;
            transition: all 0.25s ease;
        }

        .btn-primary {
            background-color: var(--energy);
            border-color: var(--energy);
            color: #0A1328;
            box-shadow: 0 0 18px rgba(183, 255, 59, 0.16);
        }

        .btn-primary:hover,
        .btn-primary:focus {
            background-color: #c8ff6a;
            border-color: #c8ff6a;
            color: #0A1328;
            box-shadow: 0 0 32px rgba(183, 255, 59, 0.32);
            transform: translateY(-2px);
        }

        .btn-outline {
            background: transparent;
            border-color: rgba(62, 230, 255, 0.5);
            color: var(--accent);
        }

        .btn-outline:hover,
        .btn-outline:focus {
            background: rgba(62, 230, 255, 0.08);
            border-color: var(--accent);
            color: var(--accent);
            box-shadow: var(--shadow-accent);
            transform: translateY(-2px);
        }

        .btn-login {
            background: rgba(255, 255, 255, 0.06);
            border-color: rgba(255, 255, 255, 0.18);
            color: var(--text-main);
            padding: 8px 22px;
            font-size: 0.9rem;
            flex-shrink: 0;
        }

        .btn-login:hover,
        .btn-login:focus {
            background: rgba(62, 230, 255, 0.08);
            border-color: rgba(62, 230, 255, 0.6);
            color: var(--accent);
        }

        .btn:focus-visible {
            outline: 3px solid rgba(62, 230, 255, 0.4);
            outline-offset: 2px;
        }

        /* ========== Header / 导航 ========== */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 1030;
            background: rgba(10, 19, 40, 0.88);
            backdrop-filter: blur(18px);
            -webkit-backdrop-filter: blur(18px);
            border-bottom: 1px solid var(--border);
            padding: 14px 0 0;
        }

        .header-main {
            display: flex;
            align-items: center;
            gap: 24px;
        }

        .site-logo {
            display: inline-flex;
            align-items: baseline;
            font-size: 1.38rem;
            font-weight: 900;
            color: var(--text-main);
            letter-spacing: 0.02em;
            text-decoration: none;
            white-space: nowrap;
        }

        .site-logo:hover {
            color: var(--text-main);
        }

        .logo-dot {
            width: 9px;
            height: 9px;
            background: var(--energy);
            border-radius: 50%;
            display: inline-block;
            margin-right: 6px;
            box-shadow: 0 0 12px rgba(183, 255, 59, 0.7);
            flex-shrink: 0;
        }

        .logo-sub {
            font-weight: 500;
            color: var(--text-sub);
            margin-left: 5px;
            font-size: 0.95rem;
        }

        .search-area {
            flex: 1;
            max-width: 480px;
            margin: 0 auto;
        }

        .search-form {
            display: flex;
            align-items: center;
            height: 44px;
            background: rgba(255, 255, 255, 0.06);
            border: 1px solid rgba(255, 255, 255, 0.12);
            border-radius: var(--radius-pill);
            padding: 0 16px;
            transition: border-color 0.2s ease, box-shadow 0.2s ease;
        }

        .search-form:focus-within {
            border-color: rgba(62, 230, 255, 0.7);
            box-shadow: 0 0 16px rgba(62, 230, 255, 0.16);
        }

        .search-form i {
            color: var(--text-sub);
            margin-right: 10px;
            font-size: 1rem;
            flex-shrink: 0;
        }

        .search-input {
            flex: 1;
            min-width: 0;
            background: transparent;
            border: none;
            outline: none;
            color: var(--text-main);
            font-size: 0.95rem;
            font-family: inherit;
        }

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

        .search-tags {
            display: flex;
            justify-content: center;
            gap: 8px;
            margin-top: 10px;
            flex-wrap: wrap;
        }

        .tag-pill {
            display: inline-block;
            font-size: 0.85rem;
            color: var(--text-sub);
            padding: 4px 12px;
            border-radius: var(--radius-pill);
            background: rgba(255, 255, 255, 0.04);
            border: 1px solid var(--border);
            text-decoration: none;
            transition: all 0.2s ease;
        }

        .tag-pill:hover {
            color: var(--accent);
            border-color: var(--border-accent);
            background: rgba(62, 230, 255, 0.08);
        }

        .header-actions {
            display: flex;
            align-items: center;
            gap: 18px;
            margin-left: auto;
            flex-shrink: 0;
        }

        .nav-links {
            display: flex;
            align-items: center;
            gap: 24px;
        }

        .nav-link-custom {
            color: var(--text-sub);
            font-size: 0.95rem;
            font-weight: 500;
            text-decoration: none;
            padding: 6px 2px;
            position: relative;
            transition: color 0.2s ease;
        }

        .nav-link-custom:hover,
        .nav-link-custom:focus {
            color: var(--text-main);
        }

        .nav-link-custom.active {
            color: var(--accent);
        }

        .nav-link-custom.active::after {
            content: "";
            position: absolute;
            left: 0;
            right: 0;
            bottom: 0;
            height: 2px;
            background: var(--accent);
            border-radius: 2px;
            box-shadow: 0 0 8px rgba(62, 230, 255, 0.55);
        }

        .navbar-toggler {
            border: 1px solid rgba(255, 255, 255, 0.18);
            border-radius: 12px;
            width: 44px;
            height: 44px;
            padding: 0;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            background: rgba(255, 255, 255, 0.06);
            color: var(--text-main);
            font-size: 1.3rem;
            transition: border-color 0.2s ease;
        }

        .navbar-toggler:hover,
        .navbar-toggler:focus {
            border-color: var(--accent);
            box-shadow: none;
        }

        .mobile-nav {
            border-top: 1px solid var(--border);
            margin-top: 14px;
        }

        .mobile-search {
            padding: 16px 0 6px;
        }

        .mobile-links {
            display: flex;
            flex-direction: column;
            gap: 8px;
            padding: 10px 0 16px;
        }

        .mobile-nav-link {
            color: var(--text-sub);
            text-decoration: none;
            padding: 10px 14px;
            border-radius: 12px;
            background: rgba(255, 255, 255, 0.03);
            font-size: 0.95rem;
            transition: all 0.2s ease;
        }

        .mobile-nav-link:hover,
        .mobile-nav-link.active {
            color: var(--accent);
            background: rgba(62, 230, 255, 0.08);
        }

        /* ========== 面包屑 ========== */
        .breadcrumb-section {
            padding: 20px 0 0;
        }

        .breadcrumb-capsule {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: rgba(255, 255, 255, 0.04);
            border: 1px solid var(--border);
            border-radius: var(--radius-pill);
            padding: 8px 18px;
            font-size: 0.88rem;
            color: var(--text-sub);
        }

        .breadcrumb-capsule a {
            color: var(--text-sub);
            text-decoration: none;
            transition: color 0.2s ease;
        }

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

        .breadcrumb-capsule i {
            font-size: 0.75rem;
            color: var(--text-weak);
        }

        .breadcrumb-capsule span {
            color: var(--accent);
        }

        /* ========== Hero ========== */
        .category-hero {
            padding: 48px 0 40px;
            background: linear-gradient(rgba(10, 19, 40, 0.9), rgba(10, 19, 40, 0.94)), url('/assets/images/backpic/back-2.png') center / cover no-repeat;
            border-bottom: 1px solid var(--border);
        }

        .hero-panel {
            position: relative;
            background: rgba(17, 31, 60, 0.55);
            border: 1px solid var(--border);
            border-radius: 20px;
            padding: 56px 40px;
            backdrop-filter: blur(14px);
            -webkit-backdrop-filter: blur(14px);
            overflow: hidden;
            box-shadow: var(--shadow-card);
        }

        .hero-panel::before {
            content: "";
            position: absolute;
            top: 0;
            left: 8%;
            right: -5%;
            height: 4px;
            background: linear-gradient(90deg, transparent, var(--accent), var(--energy), transparent);
            transform: skewX(-20deg);
        }

        .hero-panel::after {
            content: "";
            position: absolute;
            top: -40%;
            right: -10%;
            width: 420px;
            height: 420px;
            background: radial-gradient(circle, rgba(62, 230, 255, 0.14), transparent 70%);
            pointer-events: none;
        }

        .hero-badge {
            position: relative;
            z-index: 1;
            display: inline-block;
            font-size: 0.82rem;
            letter-spacing: 0.08em;
            color: var(--accent);
            border: 1px solid rgba(62, 230, 255, 0.35);
            background: rgba(62, 230, 255, 0.08);
            padding: 5px 14px;
            border-radius: var(--radius-pill);
            margin-bottom: 18px;
        }

        .hero-panel h1 {
            position: relative;
            z-index: 1;
            font-size: clamp(2rem, 3.6vw, 3rem);
            font-weight: 900;
            color: var(--text-main);
            letter-spacing: 0.02em;
            line-height: 1.25;
            margin-bottom: 16px;
        }

        .hero-panel h1 .accent {
            color: var(--accent);
        }

        .hero-desc {
            position: relative;
            z-index: 1;
            color: #A8D8FF;
            font-size: 1.05rem;
            max-width: 760px;
            line-height: 1.8;
            margin-bottom: 28px;
        }

        .hero-actions {
            position: relative;
            z-index: 1;
            display: flex;
            gap: 16px;
            flex-wrap: wrap;
        }

        /* ========== 数据指标 ========== */
        .metrics-section {
            padding: 40px 0 48px;
        }

        .metrics-row {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
        }

        .metric-item {
            background: rgba(17, 31, 60, 0.55);
            border: 1px solid var(--border);
            border-radius: var(--radius-card);
            padding: 24px 16px;
            text-align: center;
            backdrop-filter: blur(14px);
            -webkit-backdrop-filter: blur(14px);
            transition: border-color 0.3s ease, box-shadow 0.3s ease;
        }

        .metric-item:hover {
            border-color: var(--border-accent);
            box-shadow: var(--shadow-accent);
        }

        .metric-num {
            font-size: 2rem;
            font-weight: 900;
            color: var(--energy);
            font-variant-numeric: tabular-nums;
            line-height: 1.2;
        }

        .metric-label {
            color: var(--text-sub);
            font-size: 0.88rem;
            margin-top: 6px;
        }

        /* ========== 板块标题 ========== */
        .section-heading {
            margin-bottom: 32px;
        }

        .section-heading h2 {
            font-size: 1.75rem;
            font-weight: 700;
            color: var(--text-main);
            letter-spacing: 0.02em;
            margin-bottom: 8px;
        }

        .section-heading p {
            color: var(--text-sub);
            font-size: 0.95rem;
            margin-bottom: 0;
        }

        /* ========== 资源目录 ========== */
        .category-content {
            padding: 56px 0;
        }

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

        .resource-card {
            display: flex;
            flex-direction: column;
            height: 100%;
            background: rgba(17, 31, 60, 0.55);
            border: 1px solid var(--border);
            border-radius: var(--radius-card);
            overflow: hidden;
            backdrop-filter: blur(14px);
            -webkit-backdrop-filter: blur(14px);
            transition: background 0.3s ease, border-color 0.3s ease, box-shadow 0.3s ease, transform 0.3s ease;
        }

        .resource-card:hover,
        .resource-card:focus-within {
            background: var(--bg-panel-hover);
            border-color: var(--border-accent);
            box-shadow: var(--shadow-accent);
            transform: translateY(-4px);
        }

        .resource-thumb-wrap {
            position: relative;
            aspect-ratio: 16 / 9;
            overflow: hidden;
            background: var(--bg-panel);
        }

        .resource-thumb-wrap img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.4s ease;
        }

        .resource-card:hover .resource-thumb-wrap img {
            transform: scale(1.04);
        }

        .resource-cat {
            position: absolute;
            top: 12px;
            left: 12px;
            background: rgba(10, 19, 40, 0.78);
            backdrop-filter: blur(8px);
            -webkit-backdrop-filter: blur(8px);
            color: var(--accent);
            font-size: 0.78rem;
            padding: 4px 10px;
            border-radius: var(--radius-pill);
            border: 1px solid rgba(62, 230, 255, 0.25);
        }

        .resource-body {
            padding: 20px 22px 22px;
            display: flex;
            flex-direction: column;
            flex: 1;
        }

        .resource-title {
            font-size: 1.22rem;
            font-weight: 700;
            color: var(--text-main);
            margin-bottom: 10px;
        }

        .resource-desc {
            font-size: 0.92rem;
            color: var(--text-sub);
            line-height: 1.7;
            flex: 1;
        }

        .resource-tags {
            display: flex;
            gap: 8px;
            margin: 16px 0 14px;
            flex-wrap: wrap;
        }

        .resource-badge {
            font-size: 0.78rem;
            color: var(--text-sub);
            background: rgba(255, 255, 255, 0.04);
            border: 1px solid var(--border);
            padding: 3px 10px;
            border-radius: var(--radius-pill);
        }

        .resource-link {
            color: var(--accent);
            text-decoration: none;
            font-weight: 600;
            font-size: 0.9rem;
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }

        .resource-link i {
            transition: transform 0.2s ease;
        }

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

        /* ========== 侧栏 ========== */
        .sidebar-wrap {
            display: flex;
            flex-direction: column;
            gap: 24px;
            position: sticky;
            top: 120px;
        }

        .sidebar-card {
            background: rgba(17, 31, 60, 0.55);
            border: 1px solid var(--border);
            border-radius: var(--radius-card);
            padding: 24px;
            backdrop-filter: blur(14px);
            -webkit-backdrop-filter: blur(14px);
        }

        .sidebar-title {
            font-size: 1.05rem;
            font-weight: 700;
            color: var(--text-main);
            margin-bottom: 16px;
            position: relative;
            padding-bottom: 10px;
        }

        .sidebar-title::after {
            content: "";
            position: absolute;
            bottom: 0;
            left: 0;
            width: 32px;
            height: 3px;
            background: var(--accent);
            border-radius: 3px;
            box-shadow: var(--shadow-accent);
        }

        .sidebar-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
        }

        .contact-card p {
            color: var(--text-sub);
            font-size: 0.9rem;
            line-height: 1.75;
            margin-bottom: 20px;
        }

        .contact-card .btn {
            width: 100%;
        }

        /* ========== 服务优势 ========== */
        .features-section {
            padding: 64px 0;
            border-top: 1px solid var(--border);
        }

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

        .feature-card {
            background: rgba(17, 31, 60, 0.55);
            border: 1px solid var(--border);
            border-radius: var(--radius-card);
            padding: 28px 24px;
            text-align: center;
            backdrop-filter: blur(14px);
            -webkit-backdrop-filter: blur(14px);
            transition: all 0.3s ease;
        }

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

        .feature-card i {
            font-size: 2rem;
            color: var(--accent);
            display: block;
            margin-bottom: 16px;
        }

        .feature-card h3 {
            font-size: 1.1rem;
            font-weight: 700;
            color: var(--text-main);
            margin-bottom: 10px;
        }

        .feature-card p {
            color: var(--text-sub);
            font-size: 0.9rem;
            line-height: 1.7;
            margin-bottom: 0;
        }

        /* ========== FAQ ========== */
        .faq-section {
            padding: 64px 0;
            border-top: 1px solid var(--border);
        }

        .custom-accordion {
            --bs-accordion-border-width: 0;
        }

        .custom-accordion .accordion-item {
            background: rgba(17, 31, 60, 0.55);
            border: 1px solid var(--border);
            border-radius: var(--radius-card);
            margin-bottom: 16px;
            overflow: hidden;
            backdrop-filter: blur(14px);
            -webkit-backdrop-filter: blur(14px);
            transition: border-color 0.3s ease;
        }

        .custom-accordion .accordion-item:has(.accordion-button:not(.collapsed)) {
            border-color: rgba(62, 230, 255, 0.35);
        }

        .custom-accordion .accordion-button {
            background: rgba(255, 255, 255, 0.02);
            color: var(--text-main);
            font-weight: 600;
            padding: 18px 22px;
            font-size: 1rem;
            box-shadow: none;
            border-radius: 0;
            transition: background 0.3s ease, color 0.3s ease;
        }

        .custom-accordion .accordion-button:hover {
            background: rgba(255, 255, 255, 0.04);
        }

        .custom-accordion .accordion-button:not(.collapsed) {
            background: rgba(62, 230, 255, 0.06);
            color: var(--accent);
        }

        .custom-accordion .accordion-button:focus {
            box-shadow: 0 0 0 3px rgba(62, 230, 255, 0.15);
        }

        .custom-accordion .accordion-button::after {
            background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%239DB2D0' stroke-width='2' stroke-linecap='round'%3E%3Ccircle cx='12' cy='12' r='9'/%3E%3Cpath d='M12 8v8M8 12h8'/%3E%3C/svg%3E");
            background-size: 20px;
            width: 20px;
            height: 20px;
            flex-shrink: 0;
            transition: transform 0.3s ease, background-image 0.3s ease;
        }

        .custom-accordion .accordion-button:not(.collapsed)::after {
            background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%233EE6FF' stroke-width='2' stroke-linecap='round'%3E%3Ccircle cx='12' cy='12' r='9'/%3E%3Cpath d='M8 12h8'/%3E%3C/svg%3E");
            transform: rotate(45deg);
        }

        .custom-accordion .accordion-body {
            color: var(--text-sub);
            font-size: 0.95rem;
            line-height: 1.8;
            padding: 20px 22px;
            border-top: 1px solid var(--border);
        }

        /* ========== CTA ========== */
        .cta-section {
            padding: 48px 0 72px;
        }

        .cta-panel {
            position: relative;
            background: rgba(17, 31, 60, 0.6);
            border: 1px solid rgba(62, 230, 255, 0.22);
            border-radius: 20px;
            padding: 48px 40px;
            text-align: center;
            overflow: hidden;
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
        }

        .cta-panel::before {
            content: "";
            position: absolute;
            top: -60%;
            left: 50%;
            transform: translateX(-50%);
            width: 80%;
            height: 300px;
            background: radial-gradient(closest-side, rgba(62, 230, 255, 0.18), transparent);
            pointer-events: none;
        }

        .cta-panel h2 {
            position: relative;
            z-index: 1;
            color: var(--text-main);
            font-weight: 700;
            font-size: 1.75rem;
            margin-bottom: 14px;
        }

        .cta-panel p {
            position: relative;
            z-index: 1;
            color: var(--text-sub);
            margin-bottom: 28px;
            max-width: 640px;
            margin-left: auto;
            margin-right: auto;
            line-height: 1.8;
        }

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

        /* ========== 页脚 ========== */
        .site-footer {
            border-top: 1px solid var(--border);
            background: rgba(8, 15, 32, 0.92);
            padding: 48px 0 24px;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 1.4fr 1fr 1fr;
            gap: 40px;
            margin-bottom: 32px;
        }

        .footer-brand .site-logo {
            font-size: 1.2rem;
            margin-bottom: 12px;
        }

        .footer-desc {
            color: var(--text-sub);
            font-size: 0.9rem;
            max-width: 320px;
            line-height: 1.7;
            margin-top: 12px;
            margin-bottom: 0;
        }

        .footer-title {
            color: var(--text-main);
            font-weight: 700;
            font-size: 1rem;
            margin-bottom: 14px;
        }

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

        .footer-links a {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            color: var(--text-sub);
            text-decoration: none;
            padding: 6px 0;
            font-size: 0.92rem;
            transition: all 0.2s ease;
        }

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

        .footer-links i {
            font-size: 0.72rem;
            color: var(--text-weak);
        }

        .footer-contact div {
            color: var(--text-sub);
            font-size: 0.92rem;
            padding: 5px 0;
            display: flex;
            align-items: center;
            gap: 10px;
        }

        .footer-contact i {
            color: var(--accent);
            flex-shrink: 0;
        }

        .footer-bottom {
            border-top: 1px solid var(--border);
            padding-top: 20px;
            display: flex;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 10px;
            color: var(--text-weak);
            font-size: 0.85rem;
        }

        /* ========== 响应式 ========== */
        @media (max-width: 991.98px) {
            .header-main {
                gap: 16px;
            }

            .header-actions {
                gap: 12px;
            }

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

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

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

            .sidebar-wrap {
                position: static;
            }
        }

        @media (max-width: 767.98px) {
            .category-hero {
                padding: 40px 0 32px;
            }

            .hero-panel {
                padding: 36px 24px;
            }

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

            .hero-desc {
                font-size: 0.95rem;
            }

            .metrics-section {
                padding: 28px 0 40px;
            }

            .metrics-row {
                gap: 16px;
            }

            .metric-item {
                padding: 18px 12px;
            }

            .metric-num {
                font-size: 1.6rem;
            }

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

            .features-section {
                padding: 48px 0;
            }

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

            .faq-section {
                padding: 48px 0;
            }

            .cta-section {
                padding: 32px 0 56px;
            }

            .cta-panel {
                padding: 32px 24px;
            }

            .footer-grid {
                grid-template-columns: 1fr;
                gap: 28px;
            }

            .footer-bottom {
                flex-direction: column;
                align-items: flex-start;
            }
        }

        @media (max-width: 575.98px) {
            .btn {
                padding: 10px 20px;
            }

            .header-main {
                gap: 10px;
            }

            .site-logo {
                font-size: 1.15rem;
            }

            .logo-sub {
                font-size: 0.82rem;
            }

            .hero-panel {
                padding: 28px 20px;
                border-radius: 16px;
            }

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

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

            .metrics-row {
                grid-template-columns: repeat(2, 1fr);
                gap: 12px;
            }

            .metric-item {
                padding: 14px 8px;
            }

            .metric-num {
                font-size: 1.4rem;
            }

            .metric-label {
                font-size: 0.78rem;
            }

            .section-heading h2 {
                font-size: 1.4rem;
            }

            .resource-body {
                padding: 16px 16px 18px;
            }

            .resource-title {
                font-size: 1.08rem;
            }

            .resource-desc {
                font-size: 0.85rem;
            }

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

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