/* roulang page: index */
:root {
  --bg: #0B0D12;
  --bg-surface: #12141B;
  --bg-card: #181A22;
  --border: rgba(255,255,255,.08);
  --primary: #FF7A45;
  --primary-2: #FF3A5C;
  --secondary: #00C2A8;
  --accent: #FFC53D;
  --text: #FFFFFF;
  --text-2: #A9B0BF;
  --text-3: #6E7480;
  --danger: #E5484D;
  --radius-lg: 20px;
  --radius-md: 12px;
  --radius-sm: 8px;
  --shadow-1: 0 2px 8px rgba(0,0,0,.25);
  --shadow-2: 0 8px 24px rgba(0,0,0,.40);
  --gradient-main: linear-gradient(115deg, #FF7A45 0%, #FF3A5C 100%);
  --gradient-soft: linear-gradient(115deg, rgba(255,122,69,.16), rgba(255,58,92,.12));
  --bs-body-bg: var(--bg);
  --bs-body-color: var(--text);
  --bs-link-color: var(--primary);
  --bs-link-hover-color: #FF8B5E;
  --bs-btn-bg: var(--primary);
  --bs-btn-border-color: var(--primary);
  --bs-btn-hover-bg: var(--primary-2);
  --bs-btn-hover-border-color: var(--primary-2);
}

*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  background: var(--bg);
  color: var(--text);
  font-family: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  font-size: 16px;
  line-height: 1.7;
  margin: 0;
  padding: 0;
  overflow-x: hidden;
}
a { color: var(--primary); text-decoration: none; transition: color .25s; }
a:hover { color: #FF8B5E; }
img { max-width: 100%; height: auto; }
.container-custom { max-width: 1200px; padding-left: 24px; padding-right: 24px; margin: 0 auto; }
.text-2 { color: var(--text-2); }
.text-3 { color: var(--text-3); }

/* ===== Sidebar ===== */
.sidebar {
  position: fixed;
  left: 0; top: 0; bottom: 0;
  width: 240px;
  background: var(--bg-surface);
  border-right: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  z-index: 1000;
}
.sidebar-brand {
  padding: 28px 24px 20px;
  border-bottom: 1px solid var(--border);
}
.brand-link {
  display: flex;
  align-items: center;
  gap: 12px;
}
.brand-icon {
  width: 40px; height: 40px;
  border-radius: 12px;
  background: var(--gradient-main);
  color: #fff;
  font-size: 22px;
  font-weight: 800;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}
.brand-text {
  font-size: 17px;
  font-weight: 700;
  color: var(--text);
  line-height: 1.3;
  letter-spacing: .5px;
}
.sidebar-nav {
  flex: 1;
  padding: 20px 0;
  display: flex;
  flex-direction: column;
  gap: 4px;
}
.sidebar-nav .nav-link {
  position: relative;
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 12px 24px;
  color: var(--text-2);
  font-size: 15px;
  font-weight: 500;
  border-left: 4px solid transparent;
  transition: all .25s;
}
.sidebar-nav .nav-link i {
  width: 20px;
  text-align: center;
  font-size: 16px;
}
.sidebar-nav .nav-link:hover {
  color: var(--text);
  background: rgba(255,255,255,.03);
  border-left-color: var(--primary);
}
.sidebar-nav .nav-link.active {
  color: var(--text);
  background: rgba(255,122,69,.08);
  border-left-color: var(--primary);
  font-weight: 600;
}
.sidebar-bottom {
  padding: 20px 24px;
  border-top: 1px solid var(--border);
}
.sidebar-service {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px;
  background: var(--bg-card);
  border-radius: var(--radius-md);
  border: 1px solid var(--border);
}
.sidebar-service .service-icon {
  width: 36px; height: 36px;
  border-radius: 10px;
  background: var(--gradient-soft);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--primary);
  font-size: 16px;
}
.sidebar-service .service-name {
  font-size: 14px;
  font-weight: 600;
  color: var(--text);
}
.sidebar-service .service-desc {
  font-size: 12px;
  color: var(--text-3);
  margin-top: 2px;
}

/* ===== Mobile Nav ===== */
.mobile-nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  height: 64px;
  background: rgba(18,20,27,.98);
  border-bottom: 1px solid var(--border);
  display: none;
  align-items: center;
  justify-content: space-between;
  padding: 0 20px;
  z-index: 1001;
}
.mobile-brand a {
  font-size: 17px;
  font-weight: 700;
  color: var(--text);
  display: flex;
  align-items: center;
  gap: 10px;
}
.mobile-brand .brand-icon {
  width: 32px; height: 32px;
  font-size: 18px;
  border-radius: 10px;
}
.hamburger {
  background: transparent;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text);
  width: 40px; height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
  cursor: pointer;
  transition: all .25s;
}
.hamburger:hover {
  border-color: var(--primary);
  color: var(--primary);
}
.mobile-dropdown {
  position: fixed;
  top: 64px; left: 0; right: 0;
  background: var(--bg-surface);
  border-bottom: 1px solid var(--border);
  padding: 8px 0;
  display: none;
  z-index: 1000;
  box-shadow: var(--shadow-2);
}
.mobile-dropdown.open { display: block; }
.mobile-dropdown .mobile-link {
  display: block;
  padding: 14px 24px;
  color: var(--text-2);
  font-size: 15px;
  font-weight: 500;
  transition: all .2s;
}
.mobile-dropdown .mobile-link i {
  width: 22px;
  margin-right: 10px;
  text-align: center;
}
.mobile-dropdown .mobile-link:hover {
  background: rgba(255,255,255,.03);
  color: var(--text);
}
.mobile-dropdown .mobile-link.active {
  background: rgba(255,122,69,.1);
  color: var(--primary);
  font-weight: 600;
}

/* ===== Main Layout ===== */
.main-wrapper {
  margin-left: 240px;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}
.main-content { flex: 1; }

/* ===== Buttons ===== */
.btn-main {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  background: var(--gradient-main);
  color: #fff !important;
  font-size: 16px;
  font-weight: 600;
  padding: 14px 32px;
  border-radius: var(--radius-md);
  border: none;
  cursor: pointer;
  transition: all .3s;
  box-shadow: 0 2px 8px rgba(255,122,69,.2);
}
.btn-main:hover {
  filter: brightness(1.1);
  box-shadow: 0 4px 16px rgba(255,122,69,.35);
  color: #fff;
  transform: translateY(-1px);
}
.btn-main:active { transform: scale(.98); }
.btn-main.btn-lg {
  font-size: 18px;
  padding: 16px 48px;
  min-width: 200px;
  height: 56px;
}
.btn-secondary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  background: var(--bg-surface);
  color: var(--text) !important;
  font-size: 15px;
  font-weight: 500;
  padding: 13px 26px;
  border-radius: var(--radius-md);
  border: 1px solid var(--border);
  cursor: pointer;
  transition: all .3s;
}
.btn-secondary:hover {
  border-color: var(--primary);
  color: var(--primary) !important;
  background: rgba(255,122,69,.06);
}
.btn-secondary:active { transform: scale(.98); }
.btn-secondary.btn-sm {
  font-size: 13px;
  padding: 8px 18px;
}
.btn-platform {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: var(--bg-surface);
  color: var(--text-2) !important;
  font-size: 14px;
  font-weight: 500;
  padding: 10px 18px;
  border-radius: var(--radius-md);
  border: 1px solid var(--border);
  cursor: pointer;
  transition: all .3s;
}
.btn-platform:hover {
  border-color: var(--primary);
  color: var(--primary) !important;
  background: rgba(255,122,69,.05);
}
.btn-platform i { font-size: 16px; }

/* ===== Hero ===== */
.hero {
  position: relative;
  padding: 80px 0 100px;
  overflow: hidden;
  background: url('/assets/images/backpic/back-1.png') center center / cover no-repeat;
}
.hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(11,13,18,.84) 0%, rgba(11,13,18,.58) 45%, rgba(11,13,18,.38) 100%);
  z-index: 1;
}
.hero::after {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse at 20% 50%, rgba(255,122,69,.12), transparent 60%),
              radial-gradient(ellipse at 85% 30%, rgba(255,58,92,.1), transparent 55%);
  z-index: 2;
}
.hero .container-custom { position: relative; z-index: 3; }
.hero h1 {
  font-size: clamp(32px, 5vw, 56px);
  font-weight: 800;
  line-height: 1.15;
  margin: 0 0 16px;
  letter-spacing: 1px;
}
.hero-subtitle {
  font-size: 18px;
  color: var(--text-2);
  margin-bottom: 28px;
  max-width: 460px;
  line-height: 1.7;
}
.hero-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-bottom: 36px;
}
.hero-tags .tag {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 18px;
  background: rgba(255,255,255,.06);
  border: 1px solid var(--border);
  border-radius: 100px;
  font-size: 14px;
  font-weight: 500;
  color: var(--text);
  backdrop-filter: blur(6px);
}
.hero-tags .tag i { color: var(--accent); }
.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  align-items: center;
}
.hero-visual {
  position: relative;
  display: flex;
  justify-content: center;
  align-items: center;
  min-height: 460px;
}
.phone-frame {
  width: 300px;
  height: 480px;
  background: var(--bg-card);
  border-radius: 36px;
  border: 2px solid rgba(255,255,255,.12);
  box-shadow: var(--shadow-2), 0 0 60px rgba(255,122,69,.08);
  position: relative;
  overflow: hidden;
  padding: 12px;
}
.phone-notch {
  position: absolute;
  top: 20px; left: 50%;
  transform: translateX(-50%);
  width: 80px; height: 22px;
  background: #000;
  border-radius: 100px;
  z-index: 5;
}
.phone-screen {
  width: 100%;
  height: 100%;
  object-fit: cover;
  border-radius: 26px;
}
.phone-home-bar {
  position: absolute;
  bottom: 12px; left: 50%;
  transform: translateX(-50%);
  width: 60px; height: 4px;
  background: rgba(255,255,255,.3);
  border-radius: 100px;
  z-index: 5;
}
.data-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 16px;
  background: rgba(24,26,34,.92);
  border: 1px solid var(--border);
  border-radius: 100px;
  font-size: 13px;
  font-weight: 600;
  color: var(--text);
  box-shadow: var(--shadow-1);
  backdrop-filter: blur(8px);
  white-space: nowrap;
}
.data-badge i { color: var(--accent); }
.data-badge.badge-1 {
  position: absolute;
  top: 60px; left: -10px;
  transform: rotate(-6deg);
}
.data-badge.badge-2 {
  position: absolute;
  bottom: 80px; right: -10px;
  transform: rotate(4deg);
}

/* ===== Section ===== */
.section {
  padding: 80px 0;
}
.section-title {
  font-size: clamp(24px, 3vw, 36px);
  font-weight: 700;
  margin-bottom: 12px;
  line-height: 1.3;
}
.section-subtitle {
  font-size: 16px;
  color: var(--text-2);
  margin-bottom: 40px;
}

/* ===== Feature Cards ===== */
.feature-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  height: 100%;
  transition: all .3s;
}
.feature-card:hover {
  box-shadow: var(--shadow-2);
  transform: translateY(-2px);
}
.feature-card-img {
  width: 100%;
  aspect-ratio: 16/10;
  object-fit: cover;
  overflow: hidden;
}
.feature-card-img img {
  width: 100%; height: 100%;
  object-fit: cover;
  transition: transform .3s;
}
.feature-card:hover .feature-card-img img { transform: scale(1.03); }
.feature-card-body {
  padding: 22px;
}
.feature-card-body h3 {
  font-size: 18px;
  font-weight: 600;
  margin-bottom: 8px;
}
.feature-card-body p {
  font-size: 14px;
  color: var(--text-2);
  line-height: 1.6;
  margin: 0;
}

/* Carousel overrides */
#featureCarousel .carousel-indicators {
  position: static;
  margin: 32px 0 0;
  gap: 8px;
}
#featureCarousel .carousel-indicators [data-bs-target] {
  width: 28px;
  height: 3px;
  background-color: var(--border);
  border: none;
  border-radius: 100px;
  opacity: 1;
  transition: all .3s;
}
#featureCarousel .carousel-indicators .active {
  background-color: var(--primary);
  width: 40px;
}
#featureCarousel .carousel-control-prev,
#featureCarousel .carousel-control-next {
  width: 42px;
  height: 42px;
  background: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: 50%;
  top: 42%;
  transform: translateY(-50%);
  opacity: .7;
  transition: all .3s;
}
#featureCarousel .carousel-control-prev:hover,
#featureCarousel .carousel-control-next:hover {
  opacity: 1;
  border-color: var(--primary);
  box-shadow: 0 0 16px rgba(255,122,69,.2);
}
#featureCarousel .carousel-control-prev { left: -70px; }
#featureCarousel .carousel-control-next { right: -70px; }
#featureCarousel .carousel-control-prev i,
#featureCarousel .carousel-control-next i {
  font-size: 16px;
  color: var(--text-2);
}
#featureCarousel .carousel-control-prev:hover i,
#featureCarousel .carousel-control-next:hover i { color: var(--primary); }

/* ===== System Requirements ===== */
.sys-req {
  background: var(--bg-surface);
  position: relative;
}
.sys-req .sys-req-bg {
  position: absolute;
  inset: 0;
  background: url('/assets/images/backpic/back-2.png') center 20% / cover no-repeat;
  opacity: .06;
  pointer-events: none;
}
.sys-req .container-custom { position: relative; z-index: 1; }
.sys-req-left h2 { margin-bottom: 16px; }
.sys-req-left p {
  color: var(--text-2);
  margin-bottom: 24px;
  max-width: 420px;
}
.sys-req-badges {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}
.sys-req-badges .data-badge i { color: var(--secondary); }
.platform-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 24px;
  height: 100%;
  transition: all .3s;
}
.platform-card:hover {
  box-shadow: var(--shadow-2);
  transform: translateY(-2px);
  border-color: rgba(255,122,69,.4);
}
.platform-card .platform-icon {
  width: 48px; height: 48px;
  border-radius: 14px;
  background: var(--gradient-soft);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 22px;
  color: var(--primary);
  margin-bottom: 16px;
}
.platform-card h4 {
  font-size: 18px;
  font-weight: 600;
  margin-bottom: 8px;
}
.platform-card ul {
  list-style: none;
  padding: 0;
  margin: 0 0 14px;
}
.platform-card ul li {
  font-size: 13px;
  color: var(--text-2);
  padding: 5px 0;
  display: flex;
  align-items: flex-start;
  gap: 6px;
  line-height: 1.5;
}
.platform-card ul li i {
  font-size: 10px;
  color: var(--secondary);
  margin-top: 5px;
}
.platform-card .platform-feature {
  font-size: 12px;
  color: var(--text-3);
  border-top: 1px solid var(--border);
  padding-top: 12px;
  margin: 0;
  line-height: 1.5;
}

/* ===== Reviews ===== */
.reviews {
  background: var(--bg);
}
.review-stats-bar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 20px 32px;
  margin-bottom: 48px;
  box-shadow: var(--shadow-1);
}
.stat-item {
  flex: 1;
  min-width: 160px;
  text-align: center;
  padding: 8px 20px;
}
.stat-item .stat-value {
  font-size: 28px;
  font-weight: 800;
  line-height: 1.2;
  display: block;
  background: var(--gradient-main);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.stat-item .stat-label {
  font-size: 13px;
  color: var(--text-2);
  display: block;
  margin-top: 4px;
}
.stat-item .stat-label i {
  color: var(--accent);
  margin-right: 4px;
}
.stat-divider {
  width: 1px;
  height: 44px;
  background: var(--border);
}
.review-col-2 { transform: translateY(40px); }
.review-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 24px;
  margin-bottom: 20px;
  transition: all .3s;
}
.review-card:hover {
  box-shadow: var(--shadow-2);
  transform: translateY(-2px);
}
.review-stars {
  display: flex;
  gap: 2px;
  margin-bottom: 12px;
}
.review-stars i { color: var(--accent); font-size: 14px; }
.review-text {
  font-size: 14px;
  color: var(--text);
  line-height: 1.7;
  margin-bottom: 16px;
}
.review-user {
  display: flex;
  align-items: center;
  gap: 12px;
}
.review-avatar {
  width: 38px; height: 38px;
  border-radius: 50%;
  background: var(--gradient-soft);
  border: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--primary);
  font-size: 14px;
}
.review-name {
  font-size: 14px;
  font-weight: 600;
  display: block;
}
.review-date {
  font-size: 12px;
  color: var(--text-3);
}

/* ===== Download ===== */
.download-section {
  background: var(--bg-surface);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}
.download-btn-group {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  align-items: center;
  justify-content: center;
  margin: 32px 0 24px;
}
.download-hint {
  font-size: 14px;
  color: var(--text-3);
  margin-bottom: 20px;
}
.download-info {
  display: flex;
  flex-wrap: wrap;
  gap: 20px;
  justify-content: center;
  font-size: 13px;
  color: var(--text-3);
}
.download-info span {
  display: inline-flex;
  align-items: center;
  gap: 6px;
}
.download-info i { color: var(--secondary); }

/* ===== News ===== */
.news-card {
  display: flex;
  gap: 20px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 16px;
  margin-bottom: 16px;
  transition: all .3s;
}
.news-card:hover {
  border-color: rgba(255,122,69,.4);
  box-shadow: var(--shadow-2);
  transform: translateX(4px);
}
.news-thumb {
  width: 120px;
  height: 120px;
  border-radius: var(--radius-sm);
  object-fit: cover;
  flex-shrink: 0;
}
.news-content {
  flex: 1;
  min-width: 0;
  display: flex;
  flex-direction: column;
}
.news-title {
  font-size: 16px;
  font-weight: 600;
  margin: 0 0 8px;
  line-height: 1.4;
}
.news-title a {
  color: var(--text);
}
.news-title a:hover { color: var(--primary); }
.news-desc {
  font-size: 14px;
  color: var(--text-2);
  line-height: 1.6;
  margin: 0 0 12px;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  flex: 1;
}
.news-meta {
  display: flex;
  align-items: center;
  gap: 16px;
  font-size: 13px;
  color: var(--text-3);
}
.news-category {
  display: inline-flex;
  align-items: center;
  padding: 2px 10px;
  background: rgba(255,122,69,.1);
  border: 1px solid rgba(255,122,69,.2);
  border-radius: 100px;
  font-size: 12px;
  color: var(--primary);
  font-weight: 500;
}
.news-date i { margin-right: 4px; }
.news-more {
  font-size: 13px;
  font-weight: 500;
  color: var(--text-2);
  margin-left: auto;
  display: inline-flex;
  align-items: center;
  gap: 4px;
}
.news-more:hover { color: var(--primary); }
.empty-state {
  background: var(--bg-card);
  border: 2px dashed var(--border);
  border-radius: var(--radius-lg);
  padding: 48px 24px;
  text-align: center;
  color: var(--text-2);
}
.empty-state .empty-icon {
  font-size: 40px;
  color: var(--text-3);
  margin-bottom: 12px;
}
.empty-state p { font-size: 15px; color: var(--text-2); margin: 0; }

/* ===== FAQ ===== */
.faq-section {
  background: var(--bg-surface);
}
.accordion-item {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-md) !important;
  margin-bottom: 16px;
  overflow: hidden;
}
.accordion-item:first-of-type,
.accordion-item:last-of-type {
  border-radius: var(--radius-md) !important;
}
.accordion-button {
  background: var(--bg-card);
  color: var(--text);
  font-size: 15px;
  font-weight: 600;
  padding: 18px 22px;
  transition: all .3s;
  box-shadow: none !important;
}
.accordion-button::after {
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16' fill='%23FF7A45'%3E%3Cpath d='M8 4a.5.5 0 0 1 .5.5v3h3a.5.5 0 0 1 0 1h-3v3a.5.5 0 0 1-1 0v-3h-3a.5.5 0 0 1 0-1h3v-3A.5.5 0 0 1 8 4z'/%3E%3C/svg%3E");
  background-size: 14px;
}
.accordion-button:not(.collapsed) {
  background: var(--bg-card);
  color: var(--primary);
  position: relative;
}
.accordion-button:not(.collapsed)::before {
  content: '';
  position: absolute;
  left: 0; top: 0; bottom: 0;
  width: 4px;
  background: var(--gradient-main);
}
.accordion-button:focus {
  box-shadow: none;
  border-color: transparent;
}
.accordion-body {
  padding: 0 22px 18px;
  color: var(--text-2);
  font-size: 14px;
  line-height: 1.7;
  border-top: 1px solid var(--border);
  padding-top: 14px;
}
.accordion-item .faq-q-icon {
  color: var(--primary);
  margin-right: 8px;
  font-size: 13px;
}

/* ===== CTA ===== */
.cta-section {
  padding: 80px 0;
}
.cta-box {
  position: relative;
  background: var(--gradient-soft);
  border: 1px solid rgba(255,122,69,.2);
  border-radius: var(--radius-lg);
  padding: 64px 48px;
  text-align: center;
  overflow: hidden;
}
.cta-box::before {
  content: '';
  position: absolute;
  inset: 0;
  background: url('/assets/images/backpic/back-3.png') center center / cover no-repeat;
  opacity: .08;
  pointer-events: none;
}
.cta-box .cta-content { position: relative; z-index: 1; }
.cta-box h2 {
  font-size: clamp(24px, 3vw, 34px);
  font-weight: 700;
  margin-bottom: 12px;
}
.cta-box p {
  font-size: 16px;
  color: var(--text-2);
  margin-bottom: 28px;
  max-width: 480px;
  margin-left: auto;
  margin-right: auto;
}

/* ===== Footer ===== */
.footer {
  background: var(--bg-surface);
  border-top: 1.5px solid var(--primary);
  padding: 60px 0 0;
}
.footer .footer-top {
  padding-bottom: 36px;
}
.footer .footer-brand {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 16px;
}
.footer .footer-desc {
  font-size: 14px;
  color: var(--text-3);
  max-width: 260px;
  line-height: 1.7;
}
.footer h5 {
  font-size: 16px;
  font-weight: 600;
  margin-bottom: 18px;
  color: var(--text);
}
.footer-links {
  list-style: none;
  padding: 0;
  margin: 0;
}
.footer-links li { margin-bottom: 10px; }
.footer-links a {
  font-size: 14px;
  color: var(--text-2);
  transition: color .25s;
}
.footer-links a:hover { color: var(--primary); }
.footer-contact {
  list-style: none;
  padding: 0;
  margin: 0;
}
.footer-contact li {
  font-size: 14px;
  color: var(--text-2);
  margin-bottom: 10px;
  display: flex;
  align-items: flex-start;
  gap: 10px;
}
.footer-contact li i {
  color: var(--primary);
  width: 16px;
  margin-top: 3px;
}
.footer-bottom {
  border-top: 1px solid var(--border);
  padding: 20px 0;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
}
.footer-bottom p {
  font-size: 13px;
  color: var(--text-3);
  margin: 0;
}

/* ===== Responsive ===== */
@media (max-width: 1199.98px) {
  #featureCarousel .carousel-control-prev { left: -24px; }
  #featureCarousel .carousel-control-next { right: -24px; }
}
@media (max-width: 991.98px) {
  .sidebar { display: none; }
  .mobile-nav { display: flex; }
  .main-wrapper { margin-left: 0; }
  .main-content { padding-top: 64px; }
  .section { padding: 60px 0; }
  .hero { padding: 60px 0 80px; }
  .hero-visual { min-height: 400px; margin-top: 40px; }
  .phone-frame { width: 260px; height: 420px; }
  .review-col-2 { transform: none; }
  .cta-box { padding: 48px 32px; }
  #featureCarousel .carousel-control-prev { left: -14px; }
  #featureCarousel .carousel-control-next { right: -14px; }
}
@media (max-width: 767.98px) {
  .container-custom { padding-left: 16px; padding-right: 16px; }
  .section { padding: 48px 0; }
  .hero { padding: 48px 0 60px; }
  .hero h1 { font-size: 30px; }
  .hero-subtitle { font-size: 15px; }
  .hero-tags .tag { padding: 6px 14px; font-size: 13px; }
  .hero-actions { flex-direction: column; align-items: stretch; }
  .hero-actions .btn-main,
  .hero-actions .btn-secondary {
    width: 100%;
  }
  .hero-visual { min-height: 360px; }
  .phone-frame { width: 220px; height: 360px; border-radius: 28px; }
  .phone-notch { width: 60px; height: 18px; }
  .data-badge.badge-1 { left: 0; top: 30px; }
  .data-badge.badge-2 { right: 0; bottom: 50px; }
  .review-stats-bar { padding: 16px; }
  .stat-item { min-width: 100px; padding: 6px 10px; }
  .stat-value { font-size: 22px !important; }
  .news-card { flex-direction: column; }
  .news-thumb { width: 100%; height: 180px; }
  .download-btn-group { flex-direction: column; align-items: stretch; }
  .download-btn-group .btn-main,
  .download-btn-group .btn-platform {
    width: 100%;
  }
  .cta-box { padding: 36px 20px; }
  .footer { padding-top: 40px; }
  .footer .row > div { margin-bottom: 24px; }
}
@media (max-width: 520px) {
  .hero-visual { min-height: 300px; }
  .phone-frame { width: 200px; height: 330px; }
  .data-badge { font-size: 11px; padding: 6px 12px; }
  .platform-card { padding: 18px; }
  .review-stats-bar { flex-direction: column; align-items: stretch; }
  .stat-divider { width: 100%; height: 1px; }
  .nav-scroll { overflow-x: auto; }
}

/* ===== Focus Accessibility ===== */
a:focus-visible, button:focus-visible {
  outline: 2px solid var(--primary);
  outline-offset: 2px;
  border-radius: 4px;
}

/* roulang page: category1 */
:root {
      --bg: #0B0D12;
      --bg-surface: #12141B;
      --bg-card: #181A22;
      --border: rgba(255, 255, 255, .08);
      --primary: #FF7A45;
      --primary-2: #FF3A5C;
      --secondary: #00C2A8;
      --accent: #FFC53D;
      --text: #FFFFFF;
      --text-2: #A9B0BF;
      --text-3: #6E7480;
      --danger: #E5484D;
      --radius-lg: 20px;
      --radius-md: 12px;
      --radius-sm: 8px;
      --shadow-1: 0 2px 8px rgba(0, 0, 0, .25);
      --shadow-2: 0 8px 24px rgba(0, 0, 0, .40);
      --gradient-main: linear-gradient(115deg, #FF7A45 0%, #FF3A5C 100%);
      --gradient-soft: linear-gradient(115deg, rgba(255, 122, 69, .16), rgba(255, 58, 92, .12));
      --sidebar-w: 240px;
      --header-h: 64px;
    }

    * {
      box-sizing: border-box;
      margin: 0;
      padding: 0;
    }
    html {
      scroll-behavior: smooth;
    }
    body {
      font-family: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
      background: var(--bg);
      color: var(--text);
      line-height: 1.7;
      font-size: 16px;
      overflow-x: hidden;
    }
    a {
      color: var(--text);
      text-decoration: none;
      transition: color .2s ease;
    }
    a:hover {
      color: var(--primary);
    }
    img {
      max-width: 100%;
      display: block;
    }
    button:focus, .btn:focus, a:focus {
      outline: 2px solid rgba(255, 122, 69, .6);
      outline-offset: 2px;
    }

    .container-custom {
      width: 100%;
      max-width: 1200px;
      margin: 0 auto;
      padding-left: 24px;
      padding-right: 24px;
    }

    .gradient-text {
      background: var(--gradient-main);
      -webkit-background-clip: text;
      background-clip: text;
      -webkit-text-fill-color: transparent;
    }

    /* ===== Sidebar 左侧导航 ===== */
    .sidebar {
      position: fixed;
      top: 0;
      left: 0;
      width: var(--sidebar-w);
      height: 100vh;
      background: var(--bg-surface);
      border-right: 1px solid var(--border);
      display: flex;
      flex-direction: column;
      z-index: 1040;
      transition: transform .3s ease;
    }
    .sidebar-brand {
      display: flex;
      align-items: center;
      gap: 12px;
      padding: 24px 20px 16px;
      border-bottom: 1px solid var(--border);
    }
    .brand-icon {
      width: 40px;
      height: 40px;
      border-radius: 12px;
      background: var(--gradient-main);
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 22px;
      font-weight: 800;
      color: #fff;
      flex-shrink: 0;
      box-shadow: 0 4px 16px rgba(255, 58, 92, .35);
    }
    .brand-text {
      font-size: 18px;
      font-weight: 700;
      line-height: 1.2;
      color: var(--text);
      white-space: nowrap;
    }
    .sidebar-nav {
      flex: 1;
      padding: 16px 0;
      overflow-y: auto;
    }
    .sidebar-nav .nav-label {
      font-size: 12px;
      color: var(--text-3);
      padding: 12px 20px 6px;
      letter-spacing: 1px;
      font-weight: 600;
    }
    .sidebar-nav .nav-link {
      display: flex;
      align-items: center;
      gap: 12px;
      padding: 13px 20px;
      margin: 2px 10px;
      border-radius: var(--radius-md);
      font-size: 15px;
      font-weight: 500;
      color: var(--text-2);
      border-left: 3px solid transparent;
      transition: all .25s ease;
      position: relative;
    }
    .sidebar-nav .nav-link i {
      width: 20px;
      text-align: center;
      font-size: 16px;
      color: var(--text-3);
      transition: color .2s;
    }
    .sidebar-nav .nav-link:hover {
      background: rgba(255, 255, 255, .03);
      color: var(--text);
      border-left-color: rgba(255, 122, 69, .4);
    }
    .sidebar-nav .nav-link:hover i {
      color: var(--primary);
    }
    .sidebar-nav .nav-link.active {
      background: var(--gradient-soft);
      color: var(--text);
      border-left-color: var(--primary);
      font-weight: 600;
    }
    .sidebar-nav .nav-link.active i {
      color: var(--primary);
    }
    .sidebar-footer {
      padding: 16px 20px;
      border-top: 1px solid var(--border);
    }
    .sidebar-footer .s-contact {
      font-size: 13px;
      color: var(--text-3);
      display: flex;
      align-items: center;
      gap: 8px;
      margin-bottom: 8px;
    }
    .sidebar-footer .btn-download {
      display: flex;
      align-items: center;
      justify-content: center;
      gap: 8px;
      width: 100%;
      border-radius: var(--radius-md);
      padding: 10px 0;
      font-size: 14px;
      font-weight: 600;
      background: var(--gradient-main);
      color: #fff;
      border: none;
      transition: all .25s ease;
    }
    .sidebar-footer .btn-download:hover {
      transform: translateY(-2px);
      box-shadow: 0 8px 24px rgba(255, 122, 69, .35);
      color: #fff;
    }

    /* ===== Mobile Header ===== */
    .mobile-header {
      display: none;
      position: fixed;
      top: 0;
      left: 0;
      right: 0;
      height: var(--header-h);
      background: rgba(11, 13, 18, .95);
      backdrop-filter: blur(10px);
      border-bottom: 1px solid var(--border);
      z-index: 1050;
      align-items: center;
      justify-content: space-between;
      padding: 0 20px;
    }
    .mobile-header .brand-icon {
      width: 34px;
      height: 34px;
      border-radius: 10px;
      font-size: 18px;
    }
    .mobile-header .brand-text {
      font-size: 17px;
    }
    .mobile-header .hamburger {
      background: none;
      border: 1px solid var(--border);
      width: 42px;
      height: 42px;
      border-radius: 12px;
      color: var(--text);
      font-size: 18px;
      cursor: pointer;
      display: flex;
      align-items: center;
      justify-content: center;
      transition: all .2s;
    }
    .mobile-header .hamburger:hover {
      border-color: var(--primary);
      color: var(--primary);
    }
    .mobile-nav-panel {
      display: none;
      position: fixed;
      top: var(--header-h);
      left: 0;
      right: 0;
      background: var(--bg-surface);
      border-bottom: 1px solid var(--border);
      padding: 12px 0;
      z-index: 1045;
      box-shadow: 0 12px 32px rgba(0, 0, 0, .5);
    }
    .mobile-nav-panel.open {
      display: block;
    }
    .mobile-nav-panel .nav-link {
      display: flex;
      align-items: center;
      gap: 12px;
      padding: 12px 20px;
      font-size: 15px;
      color: var(--text-2);
      border-radius: var(--radius-sm);
      margin: 2px 12px;
    }
    .mobile-nav-panel .nav-link i {
      width: 20px;
      color: var(--text-3);
    }
    .mobile-nav-panel .nav-link.active {
      background: var(--gradient-soft);
      color: var(--text);
      font-weight: 600;
    }
    .mobile-nav-panel .nav-link.active i {
      color: var(--primary);
    }

    /* ===== Main Area ===== */
    .main-area {
      margin-left: var(--sidebar-w);
      min-height: 100vh;
      display: flex;
      flex-direction: column;
    }

    /* ===== Category Hero ===== */
    .category-hero {
      position: relative;
      padding: 48px 0 32px;
      background: url('/assets/images/backpic/back-1.png') center/cover no-repeat;
    }
    .category-hero::before {
      content: '';
      position: absolute;
      inset: 0;
      background: linear-gradient(112deg, rgba(11, 13, 18, .94) 0%, rgba(11, 13, 18, .72) 48%, rgba(11, 13, 18, .38) 100%);
      z-index: 1;
    }
    .category-hero .hero-content {
      position: relative;
      z-index: 2;
      display: flex;
      align-items: flex-end;
      justify-content: space-between;
      gap: 24px;
      flex-wrap: wrap;
      min-height: 260px;
      padding-bottom: 20px;
    }
    .category-hero .breadcrumb-wrap {
      font-size: 13px;
      color: var(--text-3);
      margin-bottom: 12px;
    }
    .category-hero .breadcrumb-wrap a {
      color: var(--text-2);
    }
    .category-hero .breadcrumb-wrap a:hover {
      color: var(--primary);
    }
    .category-hero .breadcrumb-wrap .sep {
      margin: 0 8px;
      color: var(--text-3);
    }
    .category-hero h1 {
      font-size: clamp(32px, 4vw, 48px);
      font-weight: 800;
      line-height: 1.15;
      margin-bottom: 12px;
    }
    .category-hero .lead-text {
      font-size: 17px;
      color: var(--text-2);
      max-width: 560px;
    }
    .hero-badge {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      background: rgba(255, 255, 255, .06);
      border: 1px solid rgba(255, 255, 255, .12);
      border-radius: 40px;
      padding: 8px 16px;
      font-size: 13px;
      color: var(--text-2);
      backdrop-filter: blur(8px);
      margin-bottom: 16px;
    }
    .hero-badge i {
      color: var(--accent);
    }

    /* ===== Section base ===== */
    .section-block {
      padding: 70px 0;
    }
    .section-block.tight {
      padding: 50px 0;
    }
    .section-title-wrap {
      margin-bottom: 36px;
    }
    .section-title-wrap .section-tag {
      display: inline-flex;
      align-items: center;
      gap: 6px;
      font-size: 13px;
      font-weight: 600;
      color: var(--primary);
      background: rgba(255, 122, 69, .1);
      border: 1px solid rgba(255, 122, 69, .2);
      border-radius: 40px;
      padding: 5px 14px;
      margin-bottom: 10px;
    }
    .section-title-wrap h2 {
      font-size: clamp(24px, 3vw, 36px);
      font-weight: 700;
      line-height: 1.3;
      margin-bottom: 8px;
    }
    .section-title-wrap .sub-text {
      color: var(--text-2);
      font-size: 15px;
      max-width: 720px;
    }

    /* ===== Intro ===== */
    .intro-block {
      background: var(--bg);
    }
    .intro-card {
      background: var(--bg-surface);
      border: 1px solid var(--border);
      border-radius: var(--radius-lg);
      padding: 40px;
      position: relative;
      overflow: hidden;
    }
    .intro-card::after {
      content: '';
      position: absolute;
      top: -40px;
      right: -40px;
      width: 180px;
      height: 180px;
      background: var(--gradient-soft);
      border-radius: 50%;
      filter: blur(50px);
      pointer-events: none;
    }
    .intro-card p {
      color: var(--text-2);
      font-size: 16px;
      margin-bottom: 16px;
      position: relative;
      z-index: 2;
    }
    .intro-card p:last-child {
      margin-bottom: 0;
    }
    .intro-stats {
      display: flex;
      gap: 28px;
      flex-wrap: wrap;
      margin-top: 24px;
    }
    .intro-stats .stat-item {
      text-align: left;
    }
    .intro-stats .stat-num {
      font-size: 28px;
      font-weight: 800;
      color: var(--text);
      line-height: 1.2;
    }
    .intro-stats .stat-num span {
      font-size: 16px;
      font-weight: 500;
      color: var(--text-3);
      margin-left: 4px;
    }
    .intro-stats .stat-label {
      font-size: 13px;
      color: var(--text-3);
    }

    /* ===== Game Cards ===== */
    .game-cards {
      background: var(--bg);
    }
    .game-card {
      background: var(--bg-card);
      border: 1px solid var(--border);
      border-radius: var(--radius-lg);
      overflow: hidden;
      margin-bottom: 24px;
      height: 100%;
      transition: transform .3s, box-shadow .3s, border-color .3s;
    }
    .game-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-2);
      border-color: rgba(255, 122, 69, .3);
    }
    .game-card .card-img-wrap {
      position: relative;
      overflow: hidden;
      aspect-ratio: 16/9;
    }
    .game-card .card-img-wrap img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      transition: transform .4s ease;
    }
    .game-card:hover .card-img-wrap img {
      transform: scale(1.04);
    }
    .game-card .card-img-wrap .hot-tag {
      position: absolute;
      top: 14px;
      left: 14px;
      background: var(--gradient-main);
      color: #fff;
      font-size: 12px;
      font-weight: 600;
      padding: 4px 12px;
      border-radius: 30px;
      box-shadow: 0 4px 12px rgba(255, 58, 92, .3);
    }
    .game-card .card-body-wrap {
      padding: 22px 24px 26px;
    }
    .game-card h3 {
      font-size: 19px;
      font-weight: 600;
      margin-bottom: 8px;
    }
    .game-card .card-desc {
      font-size: 14px;
      color: var(--text-2);
      line-height: 1.6;
      margin-bottom: 14px;
      display: -webkit-box;
      -webkit-line-clamp: 2;
      line-clamp: 2;
      -webkit-box-orient: vertical;
      overflow: hidden;
    }
    .game-card .card-meta {
      display: flex;
      align-items: center;
      gap: 10px;
      flex-wrap: wrap;
      margin-bottom: 16px;
    }
    .game-card .badge-type {
      display: inline-flex;
      align-items: center;
      font-size: 12px;
      color: var(--secondary);
      background: rgba(0, 194, 168, .12);
      border-radius: 30px;
      padding: 3px 12px;
      font-weight: 500;
    }
    .game-card .badge-score {
      display: inline-flex;
      align-items: center;
      gap: 5px;
      font-size: 12px;
      color: var(--accent);
      background: rgba(255, 197, 61, .1);
      border-radius: 30px;
      padding: 3px 12px;
      font-weight: 500;
    }
    .game-card .badge-score i {
      font-size: 11px;
    }
    .game-card .card-link {
      display: inline-flex;
      align-items: center;
      gap: 6px;
      font-size: 14px;
      font-weight: 600;
      color: var(--primary);
    }
    .game-card .card-link i {
      transition: transform .2s;
    }
    .game-card .card-link:hover i {
      transform: translateX(4px);
    }

    .row-7-5 {
      display: grid;
      grid-template-columns: 7fr 5fr;
      gap: 24px;
    }
    .row-8-4 {
      display: grid;
      grid-template-columns: 8fr 4fr;
      gap: 24px;
    }
    .row-4-4-4 {
      display: grid;
      grid-template-columns: 1fr 1fr 1fr;
      gap: 24px;
    }

    /* ===== Ranking Features ===== */
    .feature-rank {
      background: var(--bg-surface);
      border-bottom: 1px solid var(--border);
    }
    .feature-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }
    .feature-item {
      background: var(--bg-card);
      border: 1px solid var(--border);
      border-radius: var(--radius-lg);
      padding: 32px 28px;
      transition: transform .3s, box-shadow .3s;
      text-align: center;
    }
    .feature-item:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-2);
    }
    .feature-item .feat-icon {
      width: 60px;
      height: 60px;
      border-radius: 16px;
      display: inline-flex;
      align-items: center;
      justify-content: center;
      font-size: 24px;
      margin-bottom: 16px;
      background: var(--gradient-soft);
      color: var(--primary);
    }
    .feature-item h3 {
      font-size: 18px;
      font-weight: 600;
      margin-bottom: 8px;
    }
    .feature-item p {
      font-size: 14px;
      color: var(--text-2);
      line-height: 1.6;
      margin-bottom: 0;
    }

    /* ===== FAQ ===== */
    .faq-section {
      background: var(--bg);
    }
    .faq-accordion .accordion-item {
      background: var(--bg-card);
      border: 1px solid var(--border);
      border-radius: var(--radius-md) !important;
      margin-bottom: 16px;
      overflow: hidden;
      transition: border-color .25s;
    }
    .faq-accordion .accordion-item:has(.show) {
      border-color: rgba(255, 122, 69, .3);
    }
    .faq-accordion .accordion-item .accordion-header {
      background: transparent;
    }
    .faq-accordion .accordion-button {
      background: transparent;
      color: var(--text);
      font-size: 16px;
      font-weight: 600;
      padding: 20px 24px;
      border-radius: 0;
      box-shadow: none;
      display: flex;
      align-items: center;
      gap: 12px;
      border-left: 4px solid transparent;
      transition: all .25s;
    }
    .faq-accordion .accordion-button::after {
      flex-shrink: 0;
      filter: invert(1);
      opacity: .7;
    }
    .faq-accordion .accordion-button:not(.collapsed) {
      background: rgba(255, 122, 69, .06);
      border-left-color: var(--primary);
    }
    .faq-accordion .accordion-button:not(.collapsed)::after {
      opacity: 1;
    }
    .faq-accordion .accordion-button .q-icon {
      color: var(--primary);
      font-weight: 700;
      font-size: 15px;
      width: 24px;
      height: 24px;
      border-radius: 6px;
      background: rgba(255, 122, 69, .12);
      display: inline-flex;
      align-items: center;
      justify-content: center;
    }
    .faq-accordion .accordion-body {
      padding: 4px 24px 20px 60px;
      color: var(--text-2);
      font-size: 14px;
      line-height: 1.7;
    }

    /* ===== CTA ===== */
    .cta-section {
      background: var(--bg-surface);
      border-top: 1px solid var(--border);
    }
    .cta-box {
      background: var(--gradient-soft);
      border: 1px solid rgba(255, 122, 69, .2);
      border-radius: var(--radius-lg);
      padding: 48px;
      text-align: center;
      position: relative;
      overflow: hidden;
    }
    .cta-box::before {
      content: '';
      position: absolute;
      top: -60px;
      right: -60px;
      width: 200px;
      height: 200px;
      border-radius: 50%;
      background: rgba(255, 122, 69, .15);
      filter: blur(60px);
    }
    .cta-box h2 {
      font-size: clamp(24px, 3vw, 32px);
      font-weight: 700;
      margin-bottom: 10px;
    }
    .cta-box p {
      color: var(--text-2);
      margin-bottom: 28px;
      font-size: 15px;
    }
    .btn-main {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      background: var(--gradient-main);
      color: #fff;
      border: none;
      border-radius: var(--radius-md);
      padding: 14px 40px;
      font-size: 16px;
      font-weight: 600;
      transition: all .25s ease;
      box-shadow: 0 4px 16px rgba(255, 58, 92, .25);
    }
    .btn-main:hover {
      transform: translateY(-2px);
      box-shadow: 0 8px 28px rgba(255, 122, 69, .35);
      color: #fff;
    }
    .btn-main:active {
      transform: scale(.98);
    }
    .btn-outline-custom {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      background: transparent;
      color: var(--text);
      border: 1px solid var(--border);
      border-radius: var(--radius-md);
      padding: 13px 32px;
      font-size: 15px;
      font-weight: 500;
      transition: all .25s ease;
    }
    .btn-outline-custom:hover {
      border-color: var(--primary);
      color: var(--primary);
      background: rgba(255, 122, 69, .06);
    }

    /* ===== Footer ===== */
    .footer {
      background: var(--bg-surface);
      border-top: 1.5px solid transparent;
      border-image: var(--gradient-main) 1;
      padding: 48px 0 20px;
    }
    .footer .footer-brand {
      display: flex;
      align-items: center;
      gap: 10px;
      margin-bottom: 14px;
    }
    .footer .footer-brand .brand-icon {
      width: 34px;
      height: 34px;
      border-radius: 10px;
      font-size: 18px;
    }
    .footer .footer-desc {
      font-size: 14px;
      color: var(--text-3);
      line-height: 1.7;
      margin-bottom: 0;
      max-width: 320px;
    }
    .footer h5 {
      font-size: 16px;
      font-weight: 600;
      color: var(--text);
      margin-bottom: 16px;
    }
    .footer .footer-links {
      list-style: none;
      padding: 0;
      margin: 0;
    }
    .footer .footer-links li {
      margin-bottom: 8px;
    }
    .footer .footer-links a {
      font-size: 14px;
      color: var(--text-2);
      transition: color .2s;
    }
    .footer .footer-links a:hover {
      color: var(--primary);
    }
    .footer .footer-contact {
      list-style: none;
      padding: 0;
      margin: 0;
    }
    .footer .footer-contact li {
      display: flex;
      align-items: center;
      gap: 10px;
      font-size: 14px;
      color: var(--text-2);
      margin-bottom: 10px;
    }
    .footer .footer-contact li i {
      color: var(--primary);
      width: 16px;
      text-align: center;
    }
    .footer-bottom {
      border-top: 1px solid var(--border);
      margin-top: 32px;
      padding-top: 20px;
      display: flex;
      justify-content: space-between;
      flex-wrap: wrap;
      gap: 8px;
    }
    .footer-bottom p {
      font-size: 13px;
      color: var(--text-3);
      margin: 0;
    }

    /* ===== Responsive ===== */
    @media (max-width: 991.98px) {
      .sidebar {
        display: none;
      }
      .main-area {
        margin-left: 0;
        padding-top: var(--header-h);
      }
      .mobile-header {
        display: flex;
      }
      .section-block {
        padding: 50px 0;
      }
      .category-hero {
        padding: 32px 0 24px;
      }
      .category-hero .hero-content {
        min-height: 200px;
        flex-direction: column;
        align-items: flex-start;
        justify-content: flex-end;
      }
    }

    @media (max-width: 767.98px) {
      .row-7-5,
      .row-8-4,
      .row-4-4-4,
      .feature-grid {
        grid-template-columns: 1fr;
      }
      .game-card {
        margin-bottom: 16px;
      }
      .intro-card {
        padding: 24px;
      }
      .cta-box {
        padding: 32px 24px;
      }
      .btn-main {
        width: 100%;
        justify-content: center;
      }
      .btn-outline-custom {
        width: 100%;
        justify-content: center;
      }
      .footer-bottom {
        flex-direction: column;
        text-align: center;
      }
      .category-hero h1 {
        font-size: 30px;
      }
      .intro-stats {
        gap: 16px;
      }
      .intro-stats .stat-item {
        flex: 1 1 40%;
      }
      .faq-accordion .accordion-body {
        padding-left: 24px;
      }
    }

    @media (max-width: 575.98px) {
      .container-custom {
        padding-left: 16px;
        padding-right: 16px;
      }
      .hero-badge {
        font-size: 12px;
        padding: 6px 12px;
      }
      .category-hero .lead-text {
        font-size: 15px;
      }
      .section-title-wrap h2 {
        font-size: 24px;
      }
    }

/* roulang page: article */
:root {
      --bg: #0B0D12;
      --bg-surface: #12141B;
      --bg-card: #181A22;
      --border: rgba(255,255,255,.08);
      --primary: #FF7A45;
      --primary-2: #FF3A5C;
      --secondary: #00C2A8;
      --accent: #FFC53D;
      --text: #FFFFFF;
      --text-2: #A9B0BF;
      --text-3: #6E7480;
      --danger: #E5484D;
      --radius-lg: 20px;
      --radius-md: 12px;
      --radius-sm: 8px;
      --shadow-1: 0 2px 8px rgba(0,0,0,.25);
      --shadow-2: 0 8px 24px rgba(0,0,0,.40);
      --gradient-main: linear-gradient(115deg, #FF7A45 0%, #FF3A5C 100%);
      --gradient-soft: linear-gradient(115deg, rgba(255,122,69,.16), rgba(255,58,92,.12));
      --font-family: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
      --sidebar-width: 240px;
      --bs-body-bg: var(--bg);
      --bs-body-font-family: var(--font-family);
      --bs-link-color: var(--primary);
      --bs-link-hover-color: var(--primary-2);
      --bs-btn-bg: var(--primary);
      --bs-btn-border-color: transparent;
      --bs-btn-hover-bg: var(--primary-2);
      --bs-btn-hover-border-color: transparent;
      --bs-breadcrumb-divider: '›';
    }

    * { box-sizing: border-box; margin: 0; padding: 0; }
    html { scroll-behavior: smooth; }
    body {
      font-family: var(--font-family);
      background: var(--bg);
      color: var(--text);
      line-height: 1.7;
      font-size: 16px;
      -webkit-font-smoothing: antialiased;
      overflow-x: hidden;
    }
    img { max-width: 100%; display: block; }
    a { color: var(--primary); text-decoration: none; transition: color .2s; }
    a:hover { color: var(--primary-2); }
    ul, ol { padding: 0; list-style: none; }
    .container-custom {
      width: 100%;
      max-width: 1200px;
      margin: 0 auto;
      padding: 0 24px;
    }

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

    /* ===== 左侧导航 ===== */
    .sidebar {
      width: var(--sidebar-width);
      position: fixed;
      top: 0;
      left: 0;
      bottom: 0;
      background: var(--bg-surface);
      border-right: 1px solid var(--border);
      z-index: 1000;
      display: flex;
      flex-direction: column;
      padding: 24px 16px 20px;
    }
    .sidebar-brand {
      display: flex;
      align-items: center;
      gap: 10px;
      padding: 0 8px 22px;
      border-bottom: 1px solid var(--border);
      margin-bottom: 20px;
    }
    .brand-icon {
      width: 40px;
      height: 40px;
      min-width: 40px;
      border-radius: 10px;
      background: var(--gradient-main);
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 21px;
      font-weight: 800;
      color: #fff;
      box-shadow: 0 4px 14px rgba(255, 122, 69, .35);
    }
    .brand-text {
      font-size: 17px;
      font-weight: 700;
      color: var(--text);
      letter-spacing: .5px;
      white-space: nowrap;
    }
    .sidebar-nav {
      display: flex;
      flex-direction: column;
      gap: 5px;
    }
    .sidebar-nav .nav-link {
      display: flex;
      align-items: center;
      gap: 12px;
      padding: 11px 14px;
      border-radius: var(--radius-md);
      color: var(--text-2);
      font-size: 15px;
      font-weight: 500;
      transition: all .25s;
      position: relative;
    }
    .sidebar-nav .nav-link i {
      width: 18px;
      text-align: center;
      font-size: 15px;
    }
    .sidebar-nav .nav-link:hover {
      color: var(--text);
      background: rgba(255, 255, 255, .04);
    }
    .sidebar-nav .nav-link::before {
      content: '';
      position: absolute;
      left: -16px;
      top: 50%;
      transform: translateY(-50%);
      width: 4px;
      height: 22px;
      border-radius: 0 4px 4px 0;
      background: var(--gradient-main);
      opacity: 0;
      transition: opacity .25s;
    }
    .sidebar-nav .nav-link:hover::before {
      opacity: .6;
    }
    .sidebar-nav .nav-link.active {
      color: var(--text);
      background: var(--gradient-soft);
    }
    .sidebar-nav .nav-link.active::before {
      opacity: 1;
    }
    .sidebar-bottom {
      margin-top: auto;
      padding-top: 20px;
      border-top: 1px solid var(--border);
    }
    .btn-download-side {
      display: flex;
      align-items: center;
      justify-content: center;
      gap: 8px;
      background: var(--gradient-main);
      color: #fff;
      font-weight: 600;
      font-size: 14px;
      padding: 11px 16px;
      border-radius: var(--radius-md);
      transition: all .3s;
      box-shadow: 0 4px 14px rgba(255, 122, 69, .22);
    }
    .btn-download-side:hover {
      filter: brightness(1.1);
      color: #fff;
      box-shadow: 0 6px 20px rgba(255, 122, 69, .35);
      transform: translateY(-1px);
    }
    .sidebar-service {
      font-size: 12px;
      color: var(--text-3);
      text-align: center;
      margin-top: 12px;
      display: flex;
      align-items: center;
      justify-content: center;
      gap: 6px;
    }

    /* ===== 移动端头部 ===== */
    .mobile-header {
      display: none;
      position: fixed;
      top: 0;
      left: 0;
      right: 0;
      height: 64px;
      background: var(--bg-surface);
      border-bottom: 1px solid var(--border);
      z-index: 1050;
      align-items: center;
      justify-content: space-between;
      padding: 0 16px;
    }
    .mobile-brand {
      display: flex;
      align-items: center;
      gap: 8px;
    }
    .mobile-brand .brand-icon {
      width: 34px;
      height: 34px;
      min-width: 34px;
      border-radius: 8px;
      font-size: 18px;
    }
    .mobile-brand .brand-text {
      font-size: 16px;
    }
    .hamburger-btn {
      background: transparent;
      border: none;
      color: var(--text);
      font-size: 20px;
      width: 40px;
      height: 40px;
      border-radius: 8px;
      cursor: pointer;
      transition: background .2s;
      display: flex;
      align-items: center;
      justify-content: center;
    }
    .hamburger-btn:hover {
      background: rgba(255, 255, 255, .06);
    }
    .mobile-nav {
      display: none;
      position: fixed;
      top: 64px;
      left: 0;
      right: 0;
      background: var(--bg-surface);
      border-bottom: 1px solid var(--border);
      padding: 10px 14px 16px;
      z-index: 1040;
      box-shadow: var(--shadow-2);
    }
    .mobile-nav.open {
      display: block;
    }
    .mobile-nav .nav-link {
      display: flex;
      align-items: center;
      gap: 10px;
      padding: 12px 14px;
      border-radius: var(--radius-md);
      color: var(--text-2);
      font-size: 15px;
      font-weight: 500;
      transition: all .2s;
    }
    .mobile-nav .nav-link i {
      width: 18px;
      text-align: center;
    }
    .mobile-nav .nav-link:hover {
      color: var(--text);
      background: rgba(255, 255, 255, .05);
    }
    .mobile-nav .nav-link.active {
      color: var(--primary);
      background: var(--gradient-soft);
    }

    /* ===== 主内容区 ===== */
    .main-wrapper {
      flex: 1;
      margin-left: var(--sidebar-width);
      min-width: 0;
      display: flex;
      flex-direction: column;
    }
    .main-content {
      flex: 1;
      width: 100%;
      max-width: 1200px;
      margin: 0 auto;
      padding: 28px 24px 60px;
    }
    .article-container {
      max-width: 880px;
      margin: 0 auto;
    }

    /* ===== 面包屑 ===== */
    .breadcrumb-wrap {
      margin-bottom: 26px;
    }
    .breadcrumb {
      background: transparent;
      padding: 0;
      margin: 0;
    }
    .breadcrumb-item {
      font-size: 14px;
      color: var(--text-3);
    }
    .breadcrumb-item a {
      color: var(--text-2);
      transition: color .2s;
    }
    .breadcrumb-item a:hover {
      color: var(--primary);
    }
    .breadcrumb-item.active {
      color: var(--text-2);
    }
    .breadcrumb-item + .breadcrumb-item::before {
      content: '›' !important;
      color: var(--text-3) !important;
      padding: 0 8px 0 4px;
    }

    /* ===== 文章标题区 ===== */
    .article-header {
      margin-bottom: 34px;
      padding-bottom: 26px;
      border-bottom: 1px solid var(--border);
    }
    .article-header h1 {
      font-size: clamp(26px, 3.5vw, 42px);
      font-weight: 800;
      line-height: 1.25;
      margin-bottom: 20px;
      color: var(--text);
      letter-spacing: .5px;
    }
    .article-meta {
      display: flex;
      flex-wrap: wrap;
      gap: 18px 24px;
      align-items: center;
    }
    .article-meta span {
      font-size: 14px;
      color: var(--text-3);
      display: inline-flex;
      align-items: center;
      gap: 7px;
    }
    .article-meta i {
      color: var(--primary);
      font-size: 13px;
    }
    .article-category-badge {
      display: inline-flex;
      padding: 5px 14px;
      border-radius: var(--radius-sm);
      background: var(--gradient-soft);
      border: 1px solid rgba(255, 122, 69, .3);
      color: var(--primary) !important;
      font-size: 13px !important;
      font-weight: 600;
    }

    /* ===== 正文 ===== */
    .article-body {
      max-width: 760px;
      font-size: 16px;
      line-height: 1.8;
      color: var(--text-2);
    }
    .article-body p {
      margin-bottom: 1.5em;
    }
    .article-body h2 {
      font-size: 26px;
      font-weight: 700;
      color: var(--text);
      margin: 40px 0 16px;
      line-height: 1.35;
    }
    .article-body h3 {
      font-size: 21px;
      font-weight: 600;
      color: var(--text);
      margin: 30px 0 14px;
      line-height: 1.4;
    }
    .article-body h4 {
      font-size: 18px;
      font-weight: 600;
      color: var(--text);
      margin: 24px 0 12px;
    }
    .article-body img {
      border-radius: var(--radius-md);
      margin: 24px 0;
      box-shadow: var(--shadow-1);
      max-width: 100%;
      height: auto;
    }
    .article-body blockquote {
      border-left: 4px solid var(--primary);
      background: var(--bg-surface);
      padding: 18px 22px;
      border-radius: 0 var(--radius-md) var(--radius-md) 0;
      margin: 26px 0;
      color: var(--text-2);
      font-style: normal;
    }
    .article-body blockquote p:last-child {
      margin-bottom: 0;
    }
    .article-body code {
      background: var(--bg-surface);
      border: 1px solid var(--border);
      border-radius: 4px;
      padding: 2px 8px;
      font-size: 14px;
      color: var(--accent);
    }
    .article-body pre {
      background: #0f1118;
      border: 1px solid var(--border);
      border-radius: var(--radius-md);
      padding: 18px;
      overflow-x: auto;
      margin: 26px 0;
      line-height: 1.7;
    }
    .article-body pre code {
      background: transparent;
      border: none;
      padding: 0;
      color: var(--text-2);
      font-size: 14px;
    }
    .article-body ul,
    .article-body ol {
      padding-left: 1.5em;
      margin-bottom: 1.5em;
    }
    .article-body ul {
      list-style: disc;
    }
    .article-body ol {
      list-style: decimal;
    }
    .article-body li {
      margin-bottom: 8px;
    }
    .article-body a {
      color: var(--primary);
      text-decoration: underline;
      text-underline-offset: 3px;
    }
    .article-body a:hover {
      color: var(--primary-2);
    }
    .article-body table {
      width: 100%;
      border-collapse: collapse;
      margin: 24px 0;
    }
    .article-body table th,
    .article-body table td {
      border: 1px solid var(--border);
      padding: 10px 14px;
      text-align: left;
    }
    .article-body table th {
      background: var(--bg-surface);
      color: var(--text);
      font-weight: 600;
    }
    .article-body hr {
      border: none;
      height: 1px;
      background: var(--border);
      margin: 32px 0;
    }

    /* ===== 文章不存在提示 ===== */
    .article-missing {
      text-align: center;
      padding: 80px 24px;
      border: 1px dashed var(--border);
      border-radius: var(--radius-lg);
      background: var(--bg-surface);
    }
    .article-missing i {
      font-size: 46px;
      color: var(--text-3);
      margin-bottom: 16px;
    }
    .article-missing h2 {
      font-size: 24px;
      font-weight: 700;
      margin-bottom: 10px;
      color: var(--text);
    }
    .article-missing p {
      color: var(--text-3);
      margin-bottom: 26px;
    }

    /* ===== 标签 ===== */
    .article-tags {
      margin-top: 32px;
      display: flex;
      flex-wrap: wrap;
      gap: 10px;
    }
    .tag {
      display: inline-block;
      padding: 6px 16px;
      border-radius: 20px;
      background: var(--bg-surface);
      border: 1px solid var(--border);
      font-size: 13px;
      color: var(--text-2);
      transition: all .2s;
    }
    .tag:hover {
      border-color: var(--primary);
      color: var(--primary);
      transform: translateY(-1px);
    }

    /* ===== 相关推荐 ===== */
    .related-section {
      margin-top: 60px;
    }
    .related-section h2 {
      font-size: 24px;
      font-weight: 700;
      margin-bottom: 24px;
      color: var(--text);
    }
    .related-section h2::after {
      content: '';
      display: block;
      width: 36px;
      height: 3px;
      border-radius: 2px;
      background: var(--gradient-main);
      margin-top: 8px;
    }
    .related-list {
      display: flex;
      flex-direction: column;
      gap: 16px;
    }
    .related-card {
      display: flex;
      gap: 16px;
      background: var(--bg-card);
      border: 1px solid var(--border);
      border-radius: var(--radius-md);
      padding: 12px;
      transition: all .3s;
      align-items: center;
    }
    .related-card:hover {
      border-color: rgba(255, 122, 69, .4);
      box-shadow: var(--shadow-2);
      transform: translateY(-2px);
    }
    .related-cover {
      width: 140px;
      min-width: 140px;
      height: 90px;
      border-radius: 10px;
      overflow: hidden;
      background: var(--bg-surface);
    }
    .related-cover img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      transition: transform .3s;
    }
    .related-card:hover .related-cover img {
      transform: scale(1.05);
    }
    .related-info {
      flex: 1;
      min-width: 0;
    }
    .related-info h3 {
      font-size: 16px;
      font-weight: 600;
      color: var(--text);
      margin-bottom: 6px;
      line-height: 1.4;
      transition: color .2s;
    }
    .related-card:hover .related-info h3 {
      color: var(--primary);
    }
    .related-info p {
      font-size: 13px;
      color: var(--text-3);
      margin-bottom: 6px;
      overflow: hidden;
      display: -webkit-box;
      -webkit-line-clamp: 2;
      -webkit-box-orient: vertical;
    }
    .related-date {
      font-size: 12px;
      color: var(--text-3);
      display: inline-flex;
      align-items: center;
      gap: 5px;
    }

    /* ===== 按钮组 ===== */
    .article-actions {
      margin-top: 44px;
      display: flex;
      gap: 12px;
      flex-wrap: wrap;
    }
    .btn {
      border-radius: var(--radius-md);
      font-weight: 600;
      padding: 10px 24px;
      transition: all .3s;
      font-size: 15px;
    }
    .btn-primary {
      background: var(--gradient-main);
      border: none;
      color: #fff;
    }
    .btn-primary:hover {
      filter: brightness(1.1);
      box-shadow: 0 4px 16px rgba(255, 122, 69, .25);
      color: #fff;
      transform: translateY(-1px);
    }
    .btn-primary:active {
      transform: scale(.98);
    }
    .btn-outline {
      background: var(--bg-surface);
      border: 1px solid var(--border);
      color: var(--text-2);
    }
    .btn-outline:hover {
      border-color: var(--primary);
      color: var(--primary);
      transform: translateY(-1px);
    }

    /* ===== 页脚 ===== */
    .footer {
      background: var(--bg-surface);
      border-top: 1px solid var(--border);
      padding: 50px 0 24px;
      margin-top: 40px;
      position: relative;
    }
    .footer::before {
      content: '';
      position: absolute;
      top: 0;
      left: 0;
      right: 0;
      height: 2px;
      background: var(--gradient-main);
      opacity: .8;
    }
    .footer-brand {
      display: flex;
      align-items: center;
      gap: 10px;
      margin-bottom: 14px;
    }
    .footer-brand .brand-icon {
      width: 36px;
      height: 36px;
      min-width: 36px;
      border-radius: 8px;
      font-size: 18px;
    }
    .footer-brand .brand-text {
      font-size: 18px;
      font-weight: 700;
      color: var(--text);
    }
    .footer-desc {
      font-size: 14px;
      color: var(--text-3);
      line-height: 1.7;
      max-width: 340px;
      margin-bottom: 0;
    }
    .footer h5 {
      font-size: 16px;
      font-weight: 600;
      margin-bottom: 16px;
      color: var(--text);
      position: relative;
      padding-bottom: 8px;
    }
    .footer h5::after {
      content: '';
      position: absolute;
      bottom: 0;
      left: 0;
      width: 24px;
      height: 2px;
      border-radius: 2px;
      background: var(--gradient-main);
    }
    .footer-links {
      display: flex;
      flex-direction: column;
      gap: 10px;
    }
    .footer-links a {
      color: var(--text-3);
      font-size: 14px;
      transition: all .2s;
    }
    .footer-links a:hover {
      color: var(--primary);
      padding-left: 4px;
    }
    .footer-contact {
      display: flex;
      flex-direction: column;
      gap: 10px;
    }
    .footer-contact li {
      color: var(--text-3);
      font-size: 14px;
      display: flex;
      align-items: center;
      gap: 8px;
    }
    .footer-contact i {
      color: var(--primary);
      font-size: 14px;
    }
    .footer-bottom {
      margin-top: 40px;
      padding-top: 20px;
      border-top: 1px solid var(--border);
      display: flex;
      justify-content: space-between;
      flex-wrap: wrap;
      gap: 8px;
    }
    .footer-bottom p {
      font-size: 13px;
      color: var(--text-3);
      margin: 0;
    }

    /* ===== 响应式断点 ===== */
    @media (max-width: 991.98px) {
      .sidebar {
        display: none;
      }
      .main-wrapper {
        margin-left: 0;
        padding-top: 64px;
      }
      .mobile-header {
        display: flex;
      }
      .main-content {
        padding: 20px 16px 44px;
      }
    }

    @media (max-width: 767.98px) {
      .article-header h1 {
        font-size: 26px;
      }
      .article-meta {
        gap: 12px 16px;
      }
      .article-body {
        font-size: 15px;
      }
      .related-cover {
        width: 110px;
        min-width: 110px;
        height: 76px;
      }
      .related-info p {
        -webkit-line-clamp: 2;
      }
      .main-content {
        padding: 16px 14px 36px;
      }
      .breadcrumb-wrap {
        margin-bottom: 18px;
      }
      .footer-bottom {
        flex-direction: column;
        text-align: center;
      }
    }

    @media (max-width: 575.98px) {
      .article-header {
        margin-bottom: 24px;
        padding-bottom: 20px;
      }
      .article-header h1 {
        font-size: 23px;
        line-height: 1.35;
      }
      .article-meta span {
        font-size: 13px;
      }
      .article-meta .article-category-badge {
        width: auto;
      }
      .related-card {
        padding: 10px;
        gap: 12px;
      }
      .related-cover {
        width: 90px;
        min-width: 90px;
        height: 66px;
      }
      .related-info h3 {
        font-size: 15px;
      }
      .related-info p {
        font-size: 12px;
        -webkit-line-clamp: 2;
      }
      .article-actions {
        flex-direction: column;
      }
      .article-actions .btn {
        width: 100%;
        text-align: center;
      }
      .breadcrumb-item {
        font-size: 13px;
      }
      .breadcrumb-item + .breadcrumb-item::before {
        padding: 0 6px;
      }
      .tag {
        font-size: 12px;
        padding: 4px 12px;
      }
      .container-custom {
        padding: 0 16px;
      }
      .footer {
        padding: 36px 0 20px;
      }
    }

/* roulang page: category2 */
:root {
      --bg: #0B0D12;
      --bg-surface: #12141B;
      --bg-card: #181A22;
      --border: rgba(255, 255, 255, .08);
      --primary: #FF7A45;
      --primary-2: #FF3A5C;
      --secondary: #00C2A8;
      --accent: #FFC53D;
      --text: #FFFFFF;
      --text-2: #A9B0BF;
      --text-3: #6E7480;
      --danger: #E5484D;
      --radius-lg: 20px;
      --radius-md: 12px;
      --radius-sm: 8px;
      --shadow-1: 0 2px 8px rgba(0, 0, 0, .25);
      --shadow-2: 0 8px 24px rgba(0, 0, 0, .40);
      --gradient-main: linear-gradient(115deg, #FF7A45 0%, #FF3A5C 100%);
      --gradient-soft: linear-gradient(115deg, rgba(255, 122, 69, .16), rgba(255, 58, 92, .12));
      --bs-body-bg: var(--bg);
      --bs-body-color: var(--text);
      --bs-link-color: var(--primary);
      --bs-link-hover-color: var(--primary-2);
      --bs-btn-bg: transparent;
      --bs-btn-border-color: var(--border);
      --bs-btn-hover-bg: rgba(255, 122, 69, .1);
      --bs-btn-hover-border-color: var(--primary);
    }

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

    html {
      scroll-behavior: smooth;
    }

    body {
      margin: 0;
      font-family: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
      background: var(--bg);
      color: var(--text);
      line-height: 1.7;
      font-size: 16px;
      -webkit-font-smoothing: antialiased;
    }

    a {
      color: var(--primary);
      text-decoration: none;
      transition: color .2s ease;
    }

    a:hover {
      color: #ff8f5e;
    }

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

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

    ::selection {
      background: rgba(255, 122, 69, .3);
    }

    .container-custom {
      max-width: 1200px;
      margin: 0 auto;
      padding-left: 24px;
      padding-right: 24px;
    }

    .app-layout {
      display: flex;
      min-height: 100vh;
    }

    .sidebar {
      width: 240px;
      flex-shrink: 0;
      position: sticky;
      top: 0;
      height: 100vh;
      background: var(--bg-surface);
      border-right: 1px solid var(--border);
      display: flex;
      flex-direction: column;
      z-index: 1040;
      overflow-y: auto;
    }

    .sidebar-inner {
      display: flex;
      flex-direction: column;
      height: 100%;
      padding: 24px 16px 20px;
    }

    .sidebar-brand {
      display: flex;
      align-items: center;
      gap: 10px;
      padding: 4px 6px 20px;
      border-bottom: 1px solid var(--border);
      margin-bottom: 24px;
    }

    .brand-icon {
      width: 40px;
      height: 40px;
      border-radius: 12px;
      background: var(--gradient-main);
      color: #fff;
      font-weight: 800;
      font-size: 22px;
      display: inline-flex;
      align-items: center;
      justify-content: center;
      flex-shrink: 0;
      box-shadow: 0 4px 14px rgba(255, 122, 69, .35);
    }

    .brand-text {
      font-size: 18px;
      font-weight: 700;
      line-height: 1.3;
      color: var(--text);
      letter-spacing: .5px;
    }

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

    .nav-link-custom,
    a.nav-link-custom,
    .sidebar-nav a.nav-link {
      display: flex;
      align-items: center;
      gap: 12px;
      padding: 12px 14px;
      border-radius: var(--radius-md);
      color: var(--text-2);
      font-size: 15px;
      font-weight: 500;
      position: relative;
      transition: all .25s ease;
      border-left: 3px solid transparent;
      background: transparent;
    }

    .sidebar-nav a.nav-link i {
      width: 20px;
      text-align: center;
      font-size: 16px;
      color: var(--text-3);
      transition: color .25s ease;
    }

    .sidebar-nav a.nav-link:hover {
      color: var(--text);
      background: rgba(255, 122, 69, .06);
      border-left-color: var(--gradient-main);
    }

    .sidebar-nav a.nav-link:hover i {
      color: var(--primary);
    }

    .sidebar-nav a.nav-link.active {
      color: var(--text);
      background: var(--gradient-soft);
      border-left-color: var(--primary);
      font-weight: 600;
    }

    .sidebar-nav a.nav-link.active i {
      color: var(--primary);
    }

    .sidebar-bottom {
      padding-top: 20px;
      border-top: 1px solid var(--border);
      margin-top: 20px;
    }

    .btn-sidebar-cta {
      display: flex;
      align-items: center;
      justify-content: center;
      gap: 8px;
      width: 100%;
      padding: 12px;
      background: var(--gradient-main);
      color: #fff;
      border: none;
      border-radius: var(--radius-md);
      font-weight: 600;
      font-size: 15px;
      cursor: pointer;
      transition: all .25s ease;
      box-shadow: 0 4px 14px rgba(255, 122, 69, .25);
    }

    .btn-sidebar-cta:hover {
      filter: brightness(1.1);
      box-shadow: 0 6px 20px rgba(255, 122, 69, .35);
      color: #fff;
      transform: translateY(-1px);
    }

    .sidebar-support {
      margin: 12px 0 0;
      font-size: 13px;
      color: var(--text-3);
      text-align: center;
    }

    .mobile-header {
      display: none;
      position: fixed;
      top: 0;
      left: 0;
      right: 0;
      height: 64px;
      background: rgba(18, 20, 27, .95);
      border-bottom: 1px solid var(--border);
      align-items: center;
      justify-content: space-between;
      padding: 0 20px;
      z-index: 1050;
      backdrop-filter: blur(12px);
    }

    .mobile-brand {
      display: flex;
      align-items: center;
      gap: 8px;
      color: var(--text);
      font-weight: 700;
      font-size: 17px;
    }

    .mobile-toggle {
      width: 42px;
      height: 42px;
      border-radius: var(--radius-sm);
      border: 1px solid var(--border);
      background: transparent;
      color: var(--text);
      font-size: 18px;
      cursor: pointer;
      display: inline-flex;
      align-items: center;
      justify-content: center;
      transition: all .25s ease;
    }

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

    .mobile-menu {
      display: none;
      position: fixed;
      top: 64px;
      left: 0;
      right: 0;
      background: var(--bg-surface);
      border-bottom: 1px solid var(--border);
      padding: 12px 16px 20px;
      z-index: 1045;
      box-shadow: var(--shadow-2);
    }

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

    .mobile-menu a {
      display: block;
      padding: 14px 16px;
      border-radius: var(--radius-md);
      color: var(--text-2);
      font-weight: 500;
      transition: all .25s ease;
    }

    .mobile-menu a:hover,
    .mobile-menu a.active {
      color: var(--text);
      background: var(--gradient-soft);
    }

    .main-content {
      flex: 1;
      min-width: 0;
    }

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

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

    .section-header h2 {
      font-size: clamp(24px, 3vw, 36px);
      font-weight: 700;
      line-height: 1.3;
      margin-bottom: 12px;
    }

    .section-header p {
      color: var(--text-2);
      font-size: 16px;
      max-width: 560px;
      margin: 0 auto;
    }

    .category-banner {
      position: relative;
      border-radius: var(--radius-lg);
      overflow: hidden;
      margin: 32px 24px 0;
      min-height: 300px;
      display: flex;
      align-items: flex-end;
      background: var(--bg-surface);
      box-shadow: var(--shadow-1);
    }

    .category-banner-bg {
      position: absolute;
      inset: 0;
      width: 100%;
      height: 100%;
      object-fit: cover;
    }

    .category-banner-overlay {
      position: absolute;
      inset: 0;
      background: linear-gradient(100deg, rgba(11, 13, 18, .88) 30%, rgba(11, 13, 18, .45) 75%, rgba(11, 13, 18, .3));
    }

    .category-banner-content {
      position: relative;
      padding: 48px 40px;
      z-index: 1;
    }

    .banner-badge {
      display: inline-flex;
      align-items: center;
      gap: 6px;
      background: rgba(255, 122, 69, .2);
      border: 1px solid rgba(255, 122, 69, .4);
      color: var(--primary);
      font-size: 13px;
      font-weight: 600;
      padding: 6px 14px;
      border-radius: 999px;
      margin-bottom: 14px;
      letter-spacing: .5px;
    }

    .category-banner-content h1 {
      font-size: clamp(32px, 5vw, 52px);
      font-weight: 800;
      line-height: 1.15;
      margin-bottom: 10px;
    }

    .category-banner-content p {
      font-size: 18px;
      color: var(--text-2);
      margin: 0;
    }

    .category-intro {
      padding: 64px 24px 20px;
    }

    .intro-grid {
      display: grid;
      grid-template-columns: 1.1fr .9fr;
      gap: 48px;
      align-items: center;
      max-width: 1200px;
      margin: 0 auto;
    }

    .intro-grid h2 {
      font-size: clamp(24px, 3vw, 34px);
      font-weight: 700;
      line-height: 1.3;
      margin-bottom: 16px;
    }

    .intro-grid p {
      color: var(--text-2);
      font-size: 16px;
      margin-bottom: 24px;
    }

    .intro-stats {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 16px;
    }

    .stat-card {
      background: var(--bg-card);
      border: 1px solid var(--border);
      border-radius: var(--radius-lg);
      padding: 24px 20px;
      text-align: center;
      transition: all .3s ease;
    }

    .stat-card:hover {
      border-color: rgba(255, 122, 69, .4);
      box-shadow: var(--shadow-2);
      transform: translateY(-2px);
    }

    .stat-number {
      font-size: 28px;
      font-weight: 800;
      background: var(--gradient-main);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      line-height: 1.2;
    }

    .stat-label {
      font-size: 13px;
      color: var(--text-2);
      margin-top: 4px;
    }

    .feature-card-grid {
      max-width: 1200px;
      margin: 0 auto;
      padding: 0 24px;
    }

    .feature-card {
      background: var(--bg-card);
      border: 1px solid var(--border);
      border-radius: var(--radius-lg);
      overflow: hidden;
      height: 100%;
      display: flex;
      flex-direction: column;
      transition: all .3s ease;
    }

    .feature-card:hover {
      border-color: rgba(255, 122, 69, .4);
      box-shadow: var(--shadow-2);
      transform: translateY(-4px);
    }

    .feature-card-img {
      aspect-ratio: 16 / 9;
      overflow: hidden;
    }

    .feature-card-img img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      transition: transform .4s ease;
    }

    .feature-card:hover .feature-card-img img {
      transform: scale(1.04);
    }

    .feature-card-body {
      padding: 20px 22px 24px;
      display: flex;
      flex-direction: column;
      flex: 1;
    }

    .feature-card-body h3 {
      font-size: 18px;
      font-weight: 600;
      margin-bottom: 10px;
      line-height: 1.4;
    }

    .feature-card-body p {
      color: var(--text-2);
      font-size: 14px;
      flex: 1;
      margin-bottom: 16px;
    }

    .feature-link {
      display: inline-flex;
      align-items: center;
      gap: 6px;
      font-size: 14px;
      font-weight: 600;
      color: var(--primary);
    }

    .feature-link i {
      transition: transform .2s ease;
    }

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

    .step-section {
      background: var(--bg-surface);
      border-top: 1px solid var(--border);
      border-bottom: 1px solid var(--border);
    }

    .step-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
      max-width: 1200px;
      margin: 0 auto;
      padding: 0 24px;
    }

    .step-card {
      position: relative;
      background: var(--bg-card);
      border: 1px solid var(--border);
      border-radius: var(--radius-lg);
      padding: 32px 24px 24px;
      transition: all .3s ease;
    }

    .step-card:hover {
      border-color: rgba(255, 122, 69, .35);
      box-shadow: var(--shadow-2);
      transform: translateY(-3px);
    }

    .step-num {
      position: absolute;
      top: 16px;
      right: 20px;
      font-size: 44px;
      font-weight: 800;
      color: rgba(255, 255, 255, .08);
      line-height: 1;
    }

    .step-icon {
      width: 48px;
      height: 48px;
      border-radius: var(--radius-md);
      background: var(--gradient-main);
      display: inline-flex;
      align-items: center;
      justify-content: center;
      color: #fff;
      font-size: 20px;
      margin-bottom: 18px;
    }

    .step-card h3 {
      font-size: 17px;
      font-weight: 600;
      margin-bottom: 8px;
      position: relative;
    }

    .step-card p {
      color: var(--text-2);
      font-size: 14px;
      margin: 0;
      position: relative;
    }

    .platform-section {
      max-width: 1200px;
      margin: 0 auto;
      padding: 0 24px;
    }

    .platform-card {
      background: var(--bg-card);
      border: 1px solid var(--border);
      border-radius: var(--radius-lg);
      padding: 32px 28px;
      height: 100%;
      position: relative;
      overflow: hidden;
      transition: all .3s ease;
    }

    .platform-card:hover {
      border-color: rgba(255, 122, 69, .35);
      box-shadow: var(--shadow-2);
      transform: translateY(-4px);
    }

    .platform-card::after {
      content: '';
      position: absolute;
      top: 0;
      left: 0;
      right: 0;
      height: 3px;
      background: var(--gradient-main);
      opacity: 0;
      transition: opacity .3s ease;
    }

    .platform-card:hover::after {
      opacity: 1;
    }

    .platform-icon {
      font-size: 32px;
      color: var(--primary);
      margin-bottom: 16px;
    }

    .platform-card h3 {
      font-size: 20px;
      font-weight: 600;
      margin-bottom: 12px;
    }

    .platform-card ul {
      list-style: none;
      padding: 0;
      margin: 0;
    }

    .platform-card li {
      color: var(--text-2);
      font-size: 14px;
      padding: 6px 0;
      display: flex;
      gap: 8px;
      align-items: flex-start;
    }

    .platform-card li i {
      color: var(--secondary);
      margin-top: 3px;
      font-size: 12px;
    }

    .faq-section {
      max-width: 860px;
      margin: 0 auto;
      padding: 0 24px;
    }

    .accordion {
      --bs-accordion-bg: var(--bg-card);
      --bs-accordion-border-color: var(--border);
      --bs-accordion-color: var(--text);
      --bs-accordion-btn-color: var(--text);
      --bs-accordion-btn-bg: var(--bg-card);
      --bs-accordion-active-color: var(--primary);
      --bs-accordion-active-bg: rgba(255, 122, 69, .08);
      --bs-accordion-btn-focus-box-shadow: 0 0 0 4px rgba(255, 122, 69, .12);
      display: flex;
      flex-direction: column;
      gap: 16px;
    }

    .accordion-item {
      background: var(--bg-card);
      border: 1px solid var(--border);
      border-radius: var(--radius-md);
      overflow: hidden;
      position: relative;
    }

    .accordion-item::before {
      content: '';
      position: absolute;
      left: 0;
      top: 0;
      bottom: 0;
      width: 3px;
      background: var(--gradient-main);
      opacity: 0;
      transition: opacity .3s ease;
    }

    .accordion-item:has(.accordion-button:not(.collapsed))::before {
      opacity: 1;
    }

    .accordion-button {
      font-weight: 600;
      font-size: 16px;
      padding: 18px 20px;
      background: transparent;
      color: var(--text);
    }

    .accordion-button:not(.collapsed) {
      background: rgba(255, 122, 69, .08);
      color: var(--primary);
    }

    .accordion-button:focus {
      box-shadow: none;
      border-color: transparent;
    }

    .accordion-button::after {
      background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16' fill='%23FF7A45'%3E%3Cpath fill-rule='evenodd' d='M1.646 4.646a.5.5 0 0 1 .708 0L8 10.293l5.646-5.647a.5.5 0 0 1 .708.708l-6 6a.5.5 0 0 1-.708 0l-6-6a.5.5 0 0 1 0-.708z'/%3E%3C/svg%3E");
    }

    .accordion-body {
      color: var(--text-2);
      font-size: 15px;
      padding: 8px 20px 20px;
      line-height: 1.75;
    }

    .qa-tag {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      width: 24px;
      height: 24px;
      border-radius: 50%;
      background: var(--gradient-main);
      color: #fff;
      font-size: 13px;
      font-weight: 700;
      margin-right: 8px;
      flex-shrink: 0;
    }

    .cta-section {
      background: var(--bg-surface);
      border-top: 1px solid var(--border);
      text-align: center;
    }

    .cta-inner {
      max-width: 720px;
      margin: 0 auto;
      padding: 0 24px;
    }

    .btn-main {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 10px;
      padding: 16px 40px;
      background: var(--gradient-main);
      color: #fff;
      border: none;
      border-radius: var(--radius-md);
      font-size: 17px;
      font-weight: 600;
      cursor: pointer;
      transition: all .25s ease;
      box-shadow: 0 6px 20px rgba(255, 122, 69, .3);
      max-width: 220px;
    }

    .btn-main:hover {
      color: #fff;
      filter: brightness(1.08);
      box-shadow: 0 8px 28px rgba(255, 122, 69, .4);
      transform: translateY(-2px);
    }

    .btn-main:active {
      transform: scale(.98);
    }

    .btn-ghost {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 8px;
      padding: 14px 30px;
      background: var(--bg-surface);
      color: var(--text);
      border: 1px solid var(--border);
      border-radius: var(--radius-md);
      font-size: 15px;
      font-weight: 500;
      cursor: pointer;
      transition: all .25s ease;
      max-width: 220px;
    }

    .btn-ghost:hover {
      border-color: var(--primary);
      color: var(--primary);
    }

    .cta-meta {
      display: flex;
      flex-wrap: wrap;
      justify-content: center;
      gap: 20px;
      margin-top: 24px;
      color: var(--text-3);
      font-size: 13px;
    }

    .footer {
      background: var(--bg-surface);
      border-top: 1px solid var(--border);
      padding: 60px 0 24px;
    }

    .footer-top {
      border-bottom: 1px solid var(--border);
      padding-bottom: 40px;
      margin-bottom: 24px;
    }

    .footer-brand {
      display: flex;
      align-items: center;
      gap: 10px;
      margin-bottom: 16px;
    }

    .footer-desc {
      color: var(--text-2);
      font-size: 14px;
      line-height: 1.7;
      margin: 0;
      max-width: 320px;
    }

    .footer h5 {
      font-size: 15px;
      font-weight: 600;
      color: var(--text);
      margin-bottom: 16px;
    }

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

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

    .footer-links a {
      color: var(--text-2);
      font-size: 14px;
      transition: color .25s ease;
    }

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

    .footer-contact li {
      color: var(--text-2);
      font-size: 14px;
      display: flex;
      align-items: center;
      gap: 8px;
    }

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

    .footer-bottom {
      display: flex;
      justify-content: space-between;
      flex-wrap: wrap;
      gap: 12px;
    }

    .footer-bottom p {
      color: var(--text-3);
      font-size: 13px;
      margin: 0;
    }

    .no-cms-required {
      display: none;
    }

    @media (max-width: 991.98px) {
      .sidebar {
        display: none;
      }

      .mobile-header {
        display: flex;
      }

      .main-content {
        padding-top: 64px;
      }

      .category-banner {
        margin: 20px 16px 0;
        min-height: 240px;
      }

      .category-banner-content {
        padding: 32px 24px;
      }

      .page-section {
        padding: 56px 0;
      }

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

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

    @media (max-width: 767.98px) {
      .container-custom {
        padding-left: 16px;
        padding-right: 16px;
      }

      .category-banner {
        border-radius: 16px;
      }

      .category-banner-content {
        padding: 24px 20px;
      }

      .category-banner-content p {
        font-size: 15px;
      }

      .step-grid {
        grid-template-columns: 1fr;
        padding: 0 16px;
      }

      .feature-card-grid {
        padding: 0 16px;
      }

      .faq-section {
        padding: 0 16px;
      }

      .platform-section {
        padding: 0 16px;
      }

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

      .section-header {
        margin-bottom: 32px;
      }

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

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

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

    @media (max-width: 575.98px) {
      .intro-stats {
        grid-template-columns: 1fr;
      }
    }

    @media (min-width: 992px) {
      .mobile-header,
      .mobile-menu {
        display: none !important;
      }
    }

/* roulang page: category3 */
/* ===== 设计变量 ===== */
        :root {
            --bg: #0B0D12;
            --bg-surface: #12141B;
            --bg-card: #181A22;
            --border: rgba(255, 255, 255, .08);
            --primary: #FF7A45;
            --primary-2: #FF3A5C;
            --secondary: #00C2A8;
            --accent: #FFC53D;
            --text: #FFFFFF;
            --text-2: #A9B0BF;
            --text-3: #6E7480;
            --danger: #E5484D;
            --radius-lg: 20px;
            --radius-md: 12px;
            --radius-sm: 8px;
            --shadow-1: 0 2px 8px rgba(0, 0, 0, .25);
            --shadow-2: 0 8px 24px rgba(0, 0, 0, .40);
            --gradient-main: linear-gradient(115deg, #FF7A45 0%, #FF3A5C 100%);
            --gradient-soft: linear-gradient(115deg, rgba(255, 122, 69, .16), rgba(255, 58, 92, .12));
            --sidebar-width: 240px;
            --mobile-header-h: 64px;
            --bs-body-bg: #0B0D12;
            --bs-body-color: #FFFFFF;
            --bs-link-color: #FF7A45;
            --bs-link-hover-color: #FF3A5C;
            --bs-btn-bg: #FF7A45;
            --bs-btn-border-color: #FF7A45;
            --bs-btn-hover-bg: #FF3A5C;
            --bs-btn-hover-border-color: #FF3A5C;
            --bs-accordion-bg: #181A22;
            --bs-accordion-border-color: rgba(255, 255, 255, .08);
            --bs-accordion-btn-color: #FFFFFF;
            --bs-accordion-active-bg: rgba(255, 122, 69, .08);
            --bs-accordion-active-color: #FF7A45;
        }

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

        html {
            scroll-behavior: smooth;
            font-size: 16px;
        }

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

        a {
            color: var(--primary);
            text-decoration: none;
            transition: color .25s ease;
        }

        a:hover {
            color: var(--primary-2);
        }

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

        button {
            font-family: inherit;
        }

        ::selection {
            background: rgba(255, 122, 69, .3);
            color: #fff;
        }

        ::-webkit-scrollbar {
            width: 10px;
            height: 10px;
        }

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

        ::-webkit-scrollbar-thumb {
            background: rgba(255, 255, 255, .12);
            border-radius: 8px;
        }

        ::-webkit-scrollbar-thumb:hover {
            background: rgba(255, 122, 69, .4);
        }

        /* ===== 通用容器 ===== */
        .container-custom {
            max-width: 1200px;
            margin: 0 auto;
            padding-left: 24px;
            padding-right: 24px;
        }

        /* ===== 侧边栏导航 ===== */
        .sidebar {
            width: var(--sidebar-width);
            height: 100vh;
            position: fixed;
            left: 0;
            top: 0;
            z-index: 1040;
            background: var(--bg-surface);
            border-right: 1px solid var(--border);
            display: flex;
            flex-direction: column;
            transition: transform .35s ease;
        }

        .sidebar-brand {
            padding: 28px 24px 20px;
            border-bottom: 1px solid var(--border);
        }

        .brand-link {
            display: flex;
            align-items: center;
            gap: 12px;
            text-decoration: none;
        }

        .brand-icon {
            width: 40px;
            height: 40px;
            border-radius: 12px;
            background: var(--gradient-main);
            color: #fff;
            font-size: 22px;
            font-weight: 800;
            display: flex;
            align-items: center;
            justify-content: center;
            flex-shrink: 0;
            box-shadow: 0 4px 14px rgba(255, 122, 69, .25);
        }

        .brand-text {
            font-size: 18px;
            font-weight: 700;
            color: var(--text);
            letter-spacing: .5px;
            white-space: nowrap;
        }

        .brand-sub {
            font-size: 12px;
            color: var(--text-3);
            margin-top: 4px;
            letter-spacing: .3px;
            display: block;
        }

        .sidebar-nav {
            flex: 1;
            padding: 18px 0;
            overflow-y: auto;
        }

        .nav-group-label {
            font-size: 12px;
            color: var(--text-3);
            letter-spacing: 2px;
            padding: 8px 24px 8px;
            text-transform: uppercase;
        }

        .sidebar-nav .nav-link {
            position: relative;
            display: flex;
            align-items: center;
            gap: 12px;
            padding: 13px 24px;
            color: var(--text-2);
            font-size: 15px;
            font-weight: 500;
            text-decoration: none;
            transition: background .25s, color .25s;
            border-left: 4px solid transparent;
        }

        .sidebar-nav .nav-link i {
            width: 20px;
            text-align: center;
            font-size: 16px;
            color: var(--text-3);
            transition: color .25s;
        }

        .sidebar-nav .nav-link::before {
            content: '';
            position: absolute;
            left: 0;
            top: 50%;
            transform: translateY(-50%) scaleY(0);
            width: 4px;
            height: 60%;
            border-radius: 0 4px 4px 0;
            background: var(--gradient-main);
            transition: transform .25s ease;
        }

        .sidebar-nav .nav-link:hover {
            background: rgba(255, 255, 255, .03);
            color: var(--text);
        }

        .sidebar-nav .nav-link:hover i {
            color: var(--primary);
        }

        .sidebar-nav .nav-link:hover::before {
            transform: translateY(-50%) scaleY(1);
        }

        .sidebar-nav .nav-link.active {
            background: var(--gradient-soft);
            color: var(--text);
            border-left: 4px solid transparent;
        }

        .sidebar-nav .nav-link.active::before {
            transform: translateY(-50%) scaleY(1);
        }

        .sidebar-nav .nav-link.active i {
            color: var(--primary);
        }

        .sidebar-bottom {
            padding: 20px 24px;
            border-top: 1px solid var(--border);
        }

        .sidebar-bottom .support-info {
            font-size: 12px;
            color: var(--text-3);
            line-height: 1.6;
            margin-bottom: 12px;
            padding: 12px;
            background: var(--bg);
            border-radius: var(--radius-sm);
            border: 1px solid var(--border);
        }

        .sidebar-bottom .support-info strong {
            display: block;
            color: var(--text-2);
            font-size: 13px;
            margin-bottom: 2px;
        }

        .sidebar-bottom .btn-sidebar-download {
            width: 100%;
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            padding: 11px 16px;
            background: var(--gradient-main);
            color: #fff;
            border: none;
            border-radius: var(--radius-md);
            font-size: 15px;
            font-weight: 600;
            cursor: pointer;
            transition: box-shadow .3s, transform .2s;
        }

        .sidebar-bottom .btn-sidebar-download:hover {
            box-shadow: 0 6px 20px rgba(255, 122, 69, .25);
            transform: translateY(-1px);
            color: #fff;
        }

        /* ===== 移动端顶部栏 ===== */
        .mobile-header {
            display: none;
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            height: var(--mobile-header-h);
            background: var(--bg-surface);
            border-bottom: 1px solid var(--border);
            z-index: 1035;
            align-items: center;
            justify-content: space-between;
            padding: 0 16px;
        }

        .mobile-brand {
            display: flex;
            align-items: center;
            gap: 10px;
            text-decoration: none;
        }

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

        .mobile-toggle {
            width: 42px;
            height: 42px;
            border-radius: 10px;
            background: var(--bg-card);
            border: 1px solid var(--border);
            color: var(--text);
            font-size: 18px;
            display: flex;
            align-items: center;
            justify-content: center;
            cursor: pointer;
            transition: background .3s, border-color .3s;
        }

        .mobile-toggle:hover {
            border-color: var(--primary);
            background: rgba(255, 122, 69, .1);
        }

        .sidebar-overlay {
            display: none;
            position: fixed;
            inset: 0;
            background: rgba(0, 0, 0, .6);
            z-index: 1039;
            opacity: 0;
            transition: opacity .35s;
        }

        .sidebar-overlay.active {
            display: block;
            opacity: 1;
        }

        /* ===== 主内容区 ===== */
        .main-wrapper {
            margin-left: var(--sidebar-width);
            min-height: 100vh;
            display: flex;
            flex-direction: column;
        }

        .main-content {
            flex: 1;
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 40px 24px 60px;
        }

        /* ===== 分类横幅 ===== */
        .category-banner {
            position: relative;
            border-radius: var(--radius-lg);
            overflow: hidden;
            min-height: 260px;
            display: flex;
            align-items: flex-end;
            background-image: url('/assets/images/backpic/back-3.png');
            background-size: cover;
            background-position: center;
            box-shadow: var(--shadow-2);
        }

        .category-banner::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(90deg, rgba(11, 13, 18, .92) 0%, rgba(11, 13, 18, .55) 50%, rgba(11, 13, 18, .15) 100%);
        }

        .category-banner::after {
            content: '';
            position: absolute;
            top: -80px;
            right: -60px;
            width: 220px;
            height: 220px;
            border-radius: 50%;
            background: radial-gradient(circle, rgba(255, 122, 69, .18), transparent 70%);
            pointer-events: none;
        }

        .category-banner .banner-content {
            position: relative;
            z-index: 2;
            padding: 36px 40px;
            max-width: 640px;
        }

        .banner-tag {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-size: 13px;
            font-weight: 600;
            color: var(--primary);
            background: rgba(255, 122, 69, .12);
            border: 1px solid rgba(255, 122, 69, .25);
            border-radius: 100px;
            padding: 6px 16px;
            margin-bottom: 16px;
            letter-spacing: .5px;
        }

        .banner-tag i {
            font-size: 12px;
        }

        .category-banner h1 {
            font-size: clamp(28px, 4vw, 42px);
            font-weight: 800;
            line-height: 1.2;
            color: var(--text);
            margin-bottom: 12px;
            letter-spacing: .5px;
        }

        .category-banner .banner-sub {
            font-size: 16px;
            color: var(--text-2);
            line-height: 1.6;
            margin-bottom: 20px;
        }

        .banner-meta {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
        }

        .banner-meta .meta-chip {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-size: 13px;
            color: var(--text-2);
            background: rgba(255, 255, 255, .06);
            border: 1px solid var(--border);
            border-radius: 100px;
            padding: 5px 14px;
        }

        .banner-meta .meta-chip i {
            color: var(--accent);
            font-size: 12px;
        }

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

        .section-header .section-eyebrow {
            font-size: 13px;
            font-weight: 600;
            color: var(--primary);
            letter-spacing: 2px;
            text-transform: uppercase;
            display: flex;
            align-items: center;
            gap: 10px;
            margin-bottom: 8px;
        }

        .section-header .section-eyebrow::before {
            content: '';
            width: 28px;
            height: 2px;
            background: var(--gradient-main);
            border-radius: 4px;
        }

        .section-header h2 {
            font-size: clamp(24px, 3vw, 34px);
            font-weight: 700;
            line-height: 1.3;
            color: var(--text);
            margin-bottom: 8px;
        }

        .section-header p {
            font-size: 15px;
            color: var(--text-2);
            max-width: 560px;
            margin: 0;
        }

        /* ===== 攻略卡片 ===== */
        .category-cards {
            padding: 60px 0 20px;
        }

        .guide-card {
            background: var(--bg-card);
            border: 1px solid var(--border);
            border-radius: var(--radius-lg);
            overflow: hidden;
            height: 100%;
            display: flex;
            flex-direction: column;
            transition: box-shadow .3s ease, transform .3s ease, border-color .3s ease;
            box-shadow: var(--shadow-1);
        }

        .guide-card:hover {
            box-shadow: var(--shadow-2);
            transform: translateY(-4px);
            border-color: rgba(255, 122, 69, .4);
        }

        .guide-card .card-cover {
            position: relative;
            overflow: hidden;
        }

        .guide-card .card-cover img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform .4s ease;
        }

        .guide-card:hover .card-cover img {
            transform: scale(1.04);
        }

        .guide-card .card-cover .card-tag {
            position: absolute;
            top: 12px;
            left: 12px;
            background: rgba(11, 13, 18, .75);
            border: 1px solid var(--border);
            color: var(--text);
            font-size: 12px;
            font-weight: 500;
            padding: 4px 12px;
            border-radius: 100px;
            backdrop-filter: blur(8px);
        }

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

        .guide-card .card-title {
            font-size: 18px;
            font-weight: 600;
            color: var(--text);
            margin-bottom: 8px;
            line-height: 1.4;
        }

        .guide-card .card-text {
            font-size: 14px;
            color: var(--text-2);
            line-height: 1.65;
            margin-bottom: 16px;
            flex: 1;
            display: -webkit-box;
            -webkit-line-clamp: 3;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }

        .guide-card .card-meta {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding-top: 14px;
            border-top: 1px solid var(--border);
        }

        .guide-card .card-author {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 13px;
            color: var(--text-3);
        }

        .guide-card .card-author .avatar {
            width: 26px;
            height: 26px;
            border-radius: 50%;
            background: var(--gradient-main);
            color: #fff;
            font-size: 12px;
            font-weight: 600;
            display: flex;
            align-items: center;
            justify-content: center;
        }

        .guide-link {
            font-size: 14px;
            font-weight: 500;
            color: var(--primary);
            text-decoration: none;
            display: inline-flex;
            align-items: center;
            gap: 6px;
            transition: gap .3s ease, color .3s ease;
            white-space: nowrap;
        }

        .guide-link:hover {
            color: var(--primary-2);
            gap: 10px;
        }

        .guide-link i {
            font-size: 12px;
        }

        /* 横向卡片变体 */
        .guide-card--horizontal {
            flex-direction: row;
        }

        .guide-card--horizontal .card-cover {
            width: 45%;
            flex-shrink: 0;
        }

        .guide-card--horizontal .card-cover img {
            height: 300px;
        }

        .guide-card--horizontal .card-body {
            width: 55%;
        }

        .guide-card--horizontal .card-text {
            -webkit-line-clamp: 4;
        }

        /* 纵向卡片变体 */
        .guide-card--vertical .card-cover {
            height: 180px;
        }

        .guide-card--vertical .card-cover img {
            height: 180px;
        }

        .guide-card--vertical-sm .card-cover {
            height: 150px;
        }

        .guide-card--vertical-sm .card-cover img {
            height: 150px;
        }

        /* ===== FAQ 手风琴 ===== */
        .faq-section {
            padding: 60px 0 40px;
        }

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

        .accordion-item {
            background: var(--bg-card);
            border: 1px solid var(--border);
            border-radius: var(--radius-md) !important;
            margin-bottom: 14px;
            overflow: hidden;
            transition: border-color .3s ease;
            box-shadow: var(--shadow-1);
        }

        .accordion-item:hover {
            border-color: rgba(255, 122, 69, .3);
        }

        .accordion-item:focus-within {
            border-color: rgba(255, 122, 69, .5);
        }

        .accordion-header {
            margin-bottom: 0;
        }

        .accordion-button {
            background: transparent;
            color: var(--text);
            font-size: 16px;
            font-weight: 600;
            padding: 20px 24px;
            padding-left: 52px;
            position: relative;
            transition: background .25s, color .25s;
            border: none;
            box-shadow: none;
            cursor: pointer;
        }

        .accordion-button::before {
            content: '\f059';
            font-family: 'Font Awesome 6 Free';
            font-weight: 900;
            font-size: 16px;
            color: var(--primary);
            position: absolute;
            left: 22px;
            top: 50%;
            transform: translateY(-50%);
        }

        .accordion-button::after {
            content: '\f078';
            font-family: 'Font Awesome 6 Free';
            font-weight: 900;
            font-size: 14px;
            color: var(--text-2);
            background-image: none;
            transform: rotate(0deg);
            transition: transform .3s, color .3s;
            width: auto;
            height: auto;
        }

        .accordion-button:not(.collapsed) {
            background: var(--gradient-soft);
            color: var(--primary);
            box-shadow: none;
        }

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

        .accordion-button:focus {
            box-shadow: none;
            outline: none;
        }

        .accordion-button:not(:focus-visible) {
            outline: none;
            box-shadow: none;
        }

        .accordion-body {
            padding: 0 24px 20px;
            padding-left: 52px;
            color: var(--text-2);
            font-size: 15px;
            line-height: 1.75;
            border-top: 1px solid var(--border);
            background: rgba(0, 0, 0, .15);
        }

        .accordion-body p {
            margin-top: 16px;
            margin-bottom: 0;
        }

        /* ===== CTA 区块 ===== */
        .cta-section {
            padding: 80px 0 40px;
        }

        .cta-card {
            position: relative;
            border-radius: var(--radius-lg);
            overflow: hidden;
            background: linear-gradient(135deg, #1B1E2A 0%, #131520 100%);
            border: 1px solid var(--border);
            padding: 48px 56px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 32px;
            flex-wrap: wrap;
            box-shadow: var(--shadow-2);
        }

        .cta-card::before {
            content: '';
            position: absolute;
            top: -60px;
            right: -40px;
            width: 200px;
            height: 200px;
            border-radius: 50%;
            background: radial-gradient(circle, rgba(255, 58, 92, .2), transparent 70%);
            pointer-events: none;
        }

        .cta-card::after {
            content: '';
            position: absolute;
            bottom: -40px;
            left: -30px;
            width: 160px;
            height: 160px;
            border-radius: 50%;
            background: radial-gradient(circle, rgba(255, 122, 69, .12), transparent 70%);
            pointer-events: none;
        }

        .cta-content {
            flex: 1 1 380px;
            position: relative;
            z-index: 1;
        }

        .cta-content h2 {
            font-size: clamp(22px, 3vw, 32px);
            font-weight: 700;
            margin-bottom: 10px;
            color: var(--text);
        }

        .cta-content p {
            font-size: 16px;
            color: var(--text-2);
            margin: 0;
        }

        .cta-actions {
            display: flex;
            align-items: center;
            gap: 14px;
            flex-wrap: wrap;
            flex-shrink: 0;
            position: relative;
            z-index: 1;
        }

        /* ===== 按钮系统 ===== */
        .btn-main {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 10px;
            padding: 14px 32px;
            background: var(--gradient-main);
            color: #fff;
            border: none;
            border-radius: var(--radius-md);
            font-size: 16px;
            font-weight: 600;
            text-decoration: none;
            cursor: pointer;
            transition: filter .3s, box-shadow .3s, transform .2s, color .3s;
            box-shadow: 0 4px 18px rgba(255, 122, 69, .18);
        }

        .btn-main:hover {
            filter: brightness(1.08);
            box-shadow: 0 8px 28px rgba(255, 122, 69, .28);
            transform: translateY(-2px);
            color: #fff;
        }

        .btn-main:active {
            transform: scale(.98);
        }

        .btn-secondary {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 10px;
            padding: 14px 28px;
            background: var(--bg-surface);
            color: var(--text);
            border: 1px solid var(--border);
            border-radius: var(--radius-md);
            font-size: 15px;
            font-weight: 500;
            text-decoration: none;
            cursor: pointer;
            transition: border-color .3s, background .3s, color .3s, transform .2s;
        }

        .btn-secondary:hover {
            border-color: var(--primary);
            background: rgba(255, 122, 69, .08);
            color: var(--text);
            transform: translateY(-2px);
        }

        /* ===== 页脚 ===== */
        .footer {
            background: var(--bg-surface);
            border-top: none;
            position: relative;
            padding-top: 60px;
            padding-bottom: 0;
        }

        .footer::before {
            content: '';
            display: block;
            height: 2px;
            background: var(--gradient-main);
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            opacity: .6;
        }

        .footer-top {
            padding-bottom: 40px;
            border-bottom: 1px solid var(--border);
        }

        .footer-brand {
            display: flex;
            align-items: center;
            gap: 12px;
            margin-bottom: 16px;
        }

        .footer-brand .brand-text {
            font-size: 19px;
            font-weight: 700;
            color: var(--text);
        }

        .footer-desc {
            font-size: 14px;
            color: var(--text-2);
            line-height: 1.7;
            margin: 0;
            max-width: 320px;
        }

        .footer h5 {
            font-size: 16px;
            font-weight: 600;
            color: var(--text);
            margin-bottom: 18px;
            position: relative;
            padding-bottom: 10px;
        }

        .footer h5::after {
            content: '';
            position: absolute;
            left: 0;
            bottom: 0;
            width: 28px;
            height: 2px;
            background: var(--gradient-main);
            border-radius: 4px;
        }

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

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

        .footer-links a {
            font-size: 14px;
            color: var(--text-2);
            text-decoration: none;
            transition: color .25s;
        }

        .footer-links a:hover {
            color: var(--primary);
            padding-left: 4px;
            transition: padding-left .3s, color .3s;
        }

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

        .footer-contact li {
            font-size: 14px;
            color: var(--text-2);
            margin-bottom: 12px;
            display: flex;
            align-items: center;
            gap: 10px;
        }

        .footer-contact li i {
            color: var(--primary);
            width: 18px;
            text-align: center;
            flex-shrink: 0;
        }

        .footer-bottom {
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 8px;
            padding: 20px 0 24px;
        }

        .footer-bottom p {
            font-size: 13px;
            color: var(--text-3);
            margin: 0;
        }

        /* ===== 响应式 ===== */
        @media (max-width: 991.98px) {
            .mobile-header {
                display: flex;
            }

            .sidebar {
                transform: translateX(-100%);
                box-shadow: 8px 0 30px rgba(0, 0, 0, .3);
            }

            .sidebar.open {
                transform: translateX(0);
            }

            .sidebar-overlay.active {
                display: block;
                opacity: 1;
            }

            .main-wrapper {
                margin-left: 0;
                padding-top: var(--mobile-header-h);
            }

            .main-content {
                padding: 32px 20px 48px;
            }

            .category-banner {
                min-height: 220px;
            }

            .category-banner .banner-content {
                padding: 28px 24px;
            }

            .guide-card--horizontal .card-cover img {
                height: 250px;
            }
        }

        @media (max-width: 767.98px) {
            .main-content {
                padding: 24px 16px 40px;
            }

            .container-custom {
                padding-left: 16px;
                padding-right: 16px;
            }

            .category-banner {
                border-radius: 16px;
                min-height: 190px;
            }

            .category-banner .banner-content {
                padding: 24px 20px;
            }

            .category-banner h1 {
                font-size: 26px;
                margin-bottom: 8px;
            }

            .category-banner .banner-sub {
                font-size: 14px;
                margin-bottom: 14px;
            }

            .banner-meta .meta-chip {
                font-size: 12px;
                padding: 4px 10px;
            }

            .guide-card--horizontal {
                flex-direction: column;
            }

            .guide-card--horizontal .card-cover,
            .guide-card--horizontal .card-body {
                width: 100%;
            }

            .guide-card--horizontal .card-cover img {
                height: 180px;
            }

            .guide-card--vertical .card-cover,
            .guide-card--vertical .card-cover img {
                height: 160px;
            }

            .accordion-button {
                font-size: 15px;
                padding: 18px 20px;
                padding-left: 46px;
            }

            .accordion-button::before {
                left: 18px;
                font-size: 14px;
            }

            .accordion-body {
                padding: 0 20px 16px;
                padding-left: 46px;
                font-size: 14px;
            }

            .cta-card {
                padding: 32px 24px;
                flex-direction: column;
                align-items: stretch;
                text-align: center;
            }

            .cta-actions {
                justify-content: center;
            }

            .btn-main,
            .btn-secondary {
                width: 100%;
                max-width: 300px;
                margin: 0 auto;
            }

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

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

        @media (max-width: 575.98px) {
            .sidebar {
                width: 280px;
            }

            .category-banner::before {
                background: linear-gradient(0deg, rgba(11, 13, 18, .9) 0%, rgba(11, 13, 18, .5) 60%, rgba(11, 13, 18, .2) 100%);
            }

            .guide-card--vertical-sm .card-cover,
            .guide-card--vertical-sm .card-cover img {
                height: 140px;
            }
        }

        @media (min-width: 1400px) {
            .main-content {
                padding-top: 48px;
            }
        }