/* roulang page: index */
:root {
  --primary: #FF6A00;
  --primary-hover: #FF8534;
  --secondary: #7C5CFF;
  --secondary-hover: #937AFF;
  --bg-dark: #0B0E14;
  --bg-card: #121824;
  --bg-surface: #1A2230;
  --success: #33E58A;
  --warning: #FFC24D;
  --text-main: #E8EDF7;
  --text-sub: #9AA7BD;
  --text-mute: #5E6B82;
  --text-link: #C8D2E4;
  --border-card: rgba(255,255,255,0.07);
  --radius-lg: 18px;
  --radius-sm: 8px;
  --radius-pill: 40px;
  --shadow-card: 0 8px 32px rgba(0,0,0,0.28);
  --shadow-hover: 0 12px 40px rgba(255,106,0,0.15), 0 4px 12px rgba(0,0,0,0.4);
  --space-3xs: 4px;
  --space-2xs: 8px;
  --space-xs: 12px;
  --space-sm: 16px;
  --space-md: 24px;
  --space-lg: 40px;
  --space-xl: 64px;
  --space-2xl: 96px;
  --nav-height: 64px;
}

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

html { scroll-behavior: smooth; }

body {
  font-family: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Source Han Sans SC", "Noto Sans CJK SC", sans-serif;
  background: var(--bg-dark);
  color: var(--text-main);
  font-size: 15px;
  line-height: 1.8;
  margin: 0;
  padding: 0;
  font-variant-numeric: tabular-nums;
  overflow-x: hidden;
}

a { color: var(--text-link); text-decoration: none; transition: color 0.2s ease; }
a:hover { color: var(--primary); }

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

.container { max-width: 1200px; padding-left: 20px; padding-right: 20px; }

/* ========== 导航 ========== */
.nav-main {
  position: fixed;
  top: 0; left: 0; right: 0;
  height: var(--nav-height);
  background: rgba(11,14,20,0.85);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid rgba(255,255,255,0.06);
  z-index: 1050;
  transition: background 0.3s ease, box-shadow 0.3s ease;
}

.nav-main.scrolled {
  background: rgba(11,14,20,0.95);
  box-shadow: 0 4px 20px rgba(0,0,0,0.3);
}

.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
  position: relative;
}

.brand-logo {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-size: 18px;
  font-weight: 700;
  color: #fff;
  white-space: nowrap;
  text-decoration: none;
}

.brand-logo:hover { color: #fff; }

.brand-logo .logo-icon {
  width: 28px; height: 28px;
  border-radius: 6px;
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  display: flex; align-items: center; justify-content: center;
  color: #fff;
  font-size: 14px;
  font-weight: 800;
  flex-shrink: 0;
}

.brand-logo .logo-text {
  background: linear-gradient(90deg, #FF6A00, #FFC24D);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-left: 32px;
}

.nav-links .nav-item-link {
  display: inline-flex;
  align-items: center;
  padding: 8px 16px;
  border-radius: var(--radius-pill);
  font-size: 14px;
  font-weight: 600;
  color: var(--text-link);
  letter-spacing: 0.02em;
  transition: all 0.25s ease;
}

.nav-links .nav-item-link:hover {
  color: var(--primary);
  background: rgba(255,106,0,0.08);
}

.nav-links .nav-item-link.active {
  color: var(--primary);
  background: rgba(255,106,0,0.12);
}

.nav-right {
  display: flex;
  align-items: center;
  gap: 12px;
}

.nav-search {
  position: relative;
}

.nav-search input {
  width: 220px;
  height: 38px;
  background: var(--bg-dark);
  border: 1px solid rgba(255,255,255,0.12);
  border-radius: var(--radius-pill);
  padding: 0 42px 0 16px;
  color: var(--text-main);
  font-size: 13px;
  outline: none;
  transition: all 0.3s ease;
}

.nav-search input:focus {
  width: 320px;
  border-color: var(--primary);
  box-shadow: 0 0 0 4px rgba(255,106,0,0.2);
}

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

.nav-search i {
  position: absolute;
  right: 14px; top: 50%;
  transform: translateY(-50%);
  color: var(--text-mute);
  font-size: 14px;
  pointer-events: none;
}

.nav-download-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  height: 38px;
  padding: 0 22px;
  background: var(--primary);
  color: #0B0E14;
  border-radius: var(--radius-pill);
  font-size: 14px;
  font-weight: 700;
  border: none;
  cursor: pointer;
  transition: all 0.25s ease;
  white-space: nowrap;
}

.nav-download-btn:hover {
  background: var(--primary-hover);
  color: #0B0E14;
  transform: translateY(-1px);
  box-shadow: 0 4px 16px rgba(255,106,0,0.3);
}

.nav-toggle {
  display: none;
  background: transparent;
  border: 1px solid rgba(255,255,255,0.2);
  border-radius: 6px;
  color: var(--text-main);
  width: 40px; height: 40px;
  font-size: 20px;
  cursor: pointer;
  align-items: center;
  justify-content: center;
}

.mobile-menu {
  display: none;
  background: var(--bg-dark);
  border-bottom: 1px solid rgba(255,255,255,0.06);
  padding: 8px 0;
}

.mobile-menu .mobile-nav-link {
  display: block;
  padding: 14px 24px;
  font-size: 15px;
  font-weight: 600;
  color: var(--text-link);
  border-bottom: 1px solid rgba(255,255,255,0.06);
}

.mobile-menu .mobile-nav-link:hover { color: var(--primary); background: rgba(255,106,0,0.05); }
.mobile-menu .mobile-nav-link.active { color: var(--primary); }
.mobile-menu .mobile-nav-link:last-child { border-bottom: none; }

.mobile-menu .mobile-search {
  padding: 12px 24px;
}
.mobile-menu .mobile-search input {
  width: 100%;
  height: 40px;
  background: var(--bg-card);
  border: 1px solid rgba(255,255,255,0.12);
  border-radius: var(--radius-pill);
  padding: 0 16px;
  color: var(--text-main);
  font-size: 14px;
  outline: none;
}

/* ========== Hero ========== */
.hero-section {
  position: relative;
  padding: calc(var(--nav-height) + 80px) 0 60px;
  min-height: 620px;
  display: flex;
  align-items: center;
  overflow: hidden;
}

.hero-section::before {
  content: '';
  position: absolute;
  top: -200px; right: -100px;
  width: 500px; height: 500px;
  background: radial-gradient(circle, rgba(124,92,255,0.15) 0%, transparent 70%);
  pointer-events: none;
}

.hero-section .container {
  position: relative;
  z-index: 1;
}

.hero-kicker {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(255,106,0,0.12);
  border: 1px solid rgba(255,106,0,0.3);
  color: var(--primary);
  border-radius: var(--radius-pill);
  padding: 4px 14px;
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.02em;
  margin-bottom: 20px;
}

.hero-kicker .pulse-dot {
  width: 6px; height: 6px;
  background: var(--success);
  border-radius: 50%;
  animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.5; transform: scale(1.5); }
}

.hero-title {
  font-size: 52px;
  font-weight: 700;
  line-height: 1.15;
  color: var(--text-main);
  margin-bottom: 16px;
  letter-spacing: -0.01em;
}

.hero-title .gradient-text {
  background: linear-gradient(90deg, #FF6A00, #FFC24D);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-subtitle {
  font-size: 16px;
  color: var(--text-sub);
  margin-bottom: 24px;
  max-width: 480px;
  line-height: 1.7;
}

.hero-badges {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 32px;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: rgba(124,92,255,0.16);
  color: #B49BFF;
  border-radius: var(--radius-sm);
  padding: 4px 12px;
  font-size: 13px;
  font-weight: 600;
}

.hero-badge i { font-size: 12px; }

.hero-badge.green {
  background: rgba(51,229,138,0.12);
  color: var(--success);
}

.hero-badge.orange {
  background: rgba(255,106,0,0.12);
  color: var(--primary);
}

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

.btn-download {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 32px;
  background: var(--primary);
  color: #0B0E14;
  border-radius: var(--radius-pill);
  font-size: 15px;
  font-weight: 700;
  border: none;
  cursor: pointer;
  transition: all 0.25s ease;
  text-decoration: none;
}

.btn-download:hover {
  background: var(--primary-hover);
  color: #0B0E14;
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(255,106,0,0.35);
}

.btn-download:focus {
  outline: none;
  box-shadow: 0 0 0 4px rgba(255,106,0,0.2);
}

.btn-outline {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 32px;
  background: transparent;
  border: 1.5px solid var(--secondary);
  color: var(--text-link);
  border-radius: var(--radius-pill);
  font-size: 15px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.25s ease;
  text-decoration: none;
}

.btn-outline:hover {
  background: rgba(124,92,255,0.1);
  color: #fff;
  border-color: var(--secondary-hover);
  transform: translateY(-2px);
}

.hero-image-wrap {
  position: relative;
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-card);
  aspect-ratio: 16/10;
}

.hero-image-wrap img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.hero-image-wrap::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(11,14,20,0.4), rgba(11,14,20,0.8));
  border-radius: var(--radius-lg);
}

.scroll-indicator {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
  margin-top: 48px;
  color: var(--text-mute);
  font-size: 13px;
}

.scroll-indicator i {
  font-size: 18px;
  animation: bounce-down 2s ease-in-out infinite;
}

@keyframes bounce-down {
  0%, 100% { transform: translateY(0); opacity: 1; }
  50% { transform: translateY(8px); opacity: 0.5; }
}

/* ========== 板块标题 ========== */
.section-head {
  text-align: center;
  margin-bottom: var(--space-lg);
}

.section-head .section-tag {
  display: inline-block;
  background: rgba(255,106,0,0.1);
  color: var(--primary);
  border-radius: var(--radius-pill);
  padding: 4px 14px;
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.04em;
  margin-bottom: 10px;
}

.section-title {
  font-size: 34px;
  font-weight: 700;
  line-height: 1.25;
  color: var(--text-main);
  margin-bottom: 8px;
}

.section-desc {
  font-size: 15px;
  color: var(--text-sub);
  max-width: 560px;
  margin: 0 auto;
}

/* ========== 时间线 ========== */
.timeline-section {
  padding: var(--space-xl) 0;
  background: var(--bg-dark);
  position: relative;
}

.timeline-wrap {
  max-width: 800px;
  margin: 0 auto;
  position: relative;
  padding-left: 40px;
}

.timeline-wrap::before {
  content: '';
  position: absolute;
  left: 14px; top: 0; bottom: 0;
  width: 2px;
  background: linear-gradient(to bottom, var(--secondary), var(--primary));
  opacity: 0.3;
  border-radius: 2px;
}

.timeline-item {
  position: relative;
  margin-bottom: 36px;
  padding-left: 32px;
}

.timeline-item::before {
  content: '';
  position: absolute;
  left: -36px; top: 6px;
  width: 12px; height: 12px;
  border-radius: 50%;
  background: var(--primary);
  box-shadow: 0 0 12px rgba(255,106,0,0.5);
  z-index: 1;
}

.timeline-item.current::before {
  background: var(--success);
  box-shadow: 0 0 12px rgba(51,229,138,0.5);
}

.timeline-item.current::after {
  content: '';
  position: absolute;
  left: -41px; top: 1px;
  width: 22px; height: 22px;
  border-radius: 50%;
  border: 2px solid var(--success);
  animation: ring-pulse 2s ease-in-out infinite;
}

@keyframes ring-pulse {
  0%, 100% { transform: scale(0.8); opacity: 1; }
  50% { transform: scale(1.2); opacity: 0.4; }
}

.timeline-step {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  font-size: 12px;
  font-weight: 700;
  color: var(--secondary);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-bottom: 4px;
}

.timeline-card {
  background: var(--bg-card);
  border: 1px solid var(--border-card);
  border-radius: var(--radius-lg);
  padding: 24px;
  transition: all 0.3s ease;
  box-shadow: var(--shadow-card);
}

.timeline-card:hover {
  border-color: rgba(255,106,0,0.4);
  box-shadow: var(--shadow-hover);
}

.timeline-card h3 {
  font-size: 18px;
  font-weight: 600;
  margin-bottom: 6px;
  color: var(--text-main);
}

.timeline-card p {
  font-size: 14px;
  color: var(--text-sub);
  margin-bottom: 12px;
  line-height: 1.7;
}

.timeline-link {
  font-size: 14px;
  font-weight: 600;
  color: var(--primary);
}

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

/* ========== 版本亮点 ========== */
.features-section {
  padding: var(--space-xl) 0;
  background: linear-gradient(180deg, var(--bg-dark) 0%, #0e1420 100%);
}

.feature-grid {
  display: grid;
  grid-template-columns: 2fr 1fr;
  gap: 24px;
  align-items: stretch;
}

.feature-card-large {
  background: var(--bg-card);
  border: 1px solid rgba(255,106,0,0.3);
  border-radius: var(--radius-lg);
  padding: 32px;
  position: relative;
  overflow: hidden;
  transition: all 0.3s ease;
  box-shadow: 0 0 40px rgba(255,106,0,0.08);
  display: flex;
  flex-direction: column;
  min-height: 320px;
}

.feature-card-large:hover {
  box-shadow: 0 0 50px rgba(255,106,0,0.15);
  transform: translateY(-2px);
}

.feature-card-large::before {
  content: '';
  position: absolute;
  top: 0; right: 0;
  width: 160px; height: 160px;
  background: radial-gradient(circle, rgba(255,106,0,0.15) 0%, transparent 70%);
  pointer-events: none;
}

.feature-card-large .feature-icon {
  width: 48px; height: 48px;
  background: linear-gradient(135deg, var(--primary), var(--warning));
  border-radius: 12px;
  display: flex; align-items: center; justify-content: center;
  font-size: 22px;
  color: #0B0E14;
  margin-bottom: 20px;
}

.feature-card-large h3 {
  font-size: 22px;
  font-weight: 700;
  margin-bottom: 10px;
}

.feature-card-large p {
  font-size: 15px;
  color: var(--text-sub);
  line-height: 1.8;
  flex-grow: 1;
}

.feature-card-small {
  background: var(--bg-card);
  border: 1px solid var(--border-card);
  border-radius: var(--radius-lg);
  padding: 24px;
  transition: all 0.3s ease;
  box-shadow: var(--shadow-card);
  display: flex;
  flex-direction: column;
}

.feature-card-small:hover {
  border-color: rgba(255,106,0,0.3);
  box-shadow: var(--shadow-hover);
}

.feature-card-small .feature-icon {
  width: 40px; height: 40px;
  background: rgba(124,92,255,0.16);
  border-radius: 10px;
  display: flex; align-items: center; justify-content: center;
  font-size: 18px;
  color: #B49BFF;
  margin-bottom: 14px;
}

.feature-card-small h3 {
  font-size: 16px;
  font-weight: 600;
  margin-bottom: 6px;
}

.feature-card-small p {
  font-size: 13px;
  color: var(--text-sub);
  line-height: 1.7;
  flex-grow: 1;
}

.feature-badge {
  display: inline-block;
  background: linear-gradient(90deg, #FF6A00, #FFC24D);
  color: #0B0E14;
  font-size: 12px;
  font-weight: 700;
  border-radius: var(--radius-sm);
  padding: 2px 10px;
  align-self: flex-start;
  margin-bottom: 12px;
}

/* ========== 版本对比 ========== */
.compare-section {
  padding: var(--space-xl) 0;
  background: var(--bg-dark);
}

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

.compare-card {
  background: var(--bg-card);
  border: 1px solid var(--border-card);
  border-radius: var(--radius-lg);
  padding: 32px 28px;
  position: relative;
  transition: all 0.3s ease;
  box-shadow: var(--shadow-card);
  display: flex;
  flex-direction: column;
}

.compare-card:hover {
  border-color: rgba(255,106,0,0.3);
  box-shadow: var(--shadow-hover);
  transform: translateY(-3px);
}

.compare-card.recommended {
  border: 2px solid var(--primary);
  box-shadow: 0 0 40px rgba(255,106,0,0.12);
  transform: scale(1.03);
  padding-top: 44px;
}

.compare-card.recommended:hover {
  transform: scale(1.03) translateY(-3px);
}

.hot-badge {
  position: absolute;
  top: -1px; right: 24px;
  background: linear-gradient(90deg, #FF6A00, #FFC24D);
  color: #0B0E14;
  font-size: 12px;
  font-weight: 700;
  border-radius: 0 0 var(--radius-sm) var(--radius-sm);
  padding: 4px 16px;
  letter-spacing: 0.05em;
}

.compare-name {
  font-size: 20px;
  font-weight: 700;
  color: var(--text-main);
  margin-bottom: 6px;
}

.compare-price {
  font-size: 28px;
  font-weight: 800;
  color: var(--primary);
  margin-bottom: 20px;
}

.compare-price .price-unit {
  font-size: 14px;
  font-weight: 400;
  color: var(--text-mute);
}

.compare-feats {
  list-style: none;
  padding: 0;
  margin: 0 0 24px;
  flex-grow: 1;
}

.compare-feats li {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  font-size: 14px;
  color: var(--text-sub);
  padding: 7px 0;
  line-height: 1.5;
}

.compare-feats li .check-icon {
  color: var(--success);
  font-size: 14px;
  flex-shrink: 0;
  margin-top: 2px;
}

.compare-feats li .dash-icon {
  color: var(--text-mute);
  font-size: 14px;
  flex-shrink: 0;
  margin-top: 2px;
}

.compare-btn {
  display: block;
  width: 100%;
  padding: 12px 20px;
  text-align: center;
  border-radius: var(--radius-pill);
  font-size: 14px;
  font-weight: 700;
  border: 1.5px solid var(--secondary);
  background: transparent;
  color: var(--text-link);
  cursor: pointer;
  transition: all 0.25s ease;
  text-decoration: none;
}

.compare-btn:hover {
  background: rgba(124,92,255,0.1);
  color: #fff;
  border-color: var(--secondary-hover);
}

.compare-btn.solid {
  background: var(--primary);
  border-color: var(--primary);
  color: #0B0E14;
}

.compare-btn.solid:hover {
  background: var(--primary-hover);
  border-color: var(--primary-hover);
  color: #0B0E14;
  box-shadow: 0 6px 20px rgba(255,106,0,0.3);
}

/* ========== CTA ========== */
.cta-section {
  background: linear-gradient(120deg, #FF6A00 0%, #7C5CFF 100%);
  padding: 80px 0;
  position: relative;
  overflow: hidden;
}

.cta-section::before {
  content: '';
  position: absolute;
  top: -60px; right: -60px;
  width: 260px; height: 260px;
  background: rgba(255,255,255,0.08);
  border-radius: 50%;
  pointer-events: none;
}

.cta-section .container {
  position: relative;
  z-index: 1;
  text-align: center;
}

.cta-title {
  font-size: 36px;
  font-weight: 800;
  color: #0B0E14;
  margin-bottom: 12px;
  line-height: 1.2;
}

.cta-desc {
  font-size: 16px;
  color: rgba(11,14,20,0.8);
  margin-bottom: 28px;
}

.cta-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 14px 40px;
  background: #0B0E14;
  color: #fff;
  border-radius: var(--radius-pill);
  font-size: 16px;
  font-weight: 700;
  border: none;
  cursor: pointer;
  transition: all 0.25s ease;
  text-decoration: none;
}

.cta-btn:hover {
  background: #1A2230;
  color: #fff;
  transform: translateY(-2px);
  box-shadow: 0 8px 30px rgba(0,0,0,0.3);
}

.cta-note {
  font-size: 13px;
  color: rgba(11,14,20,0.7);
  margin-top: 16px;
}

/* ========== 资讯 ========== */
.news-section {
  padding: var(--space-xl) 0;
  background: var(--bg-dark);
}

.news-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
  margin-bottom: 32px;
}

.news-card {
  display: flex;
  align-items: stretch;
  background: var(--bg-card);
  border: 1px solid var(--border-card);
  border-radius: var(--radius-lg);
  overflow: hidden;
  text-decoration: none;
  transition: all 0.3s ease;
  box-shadow: var(--shadow-card);
}

.news-card:hover {
  border-color: rgba(255,106,0,0.5);
  box-shadow: var(--shadow-hover);
  transform: translateY(-3px);
}

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

.news-thumb {
  width: 120px;
  min-width: 120px;
  background: linear-gradient(135deg, #FF6A00, #7C5CFF);
  position: relative;
  overflow: hidden;
}

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

.news-thumb::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(255,106,0,0.1), rgba(124,92,255,0.1));
}

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

.news-card-title {
  font-size: 16px;
  font-weight: 600;
  color: var(--text-main);
  line-height: 1.5;
  margin-bottom: 6px;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  transition: color 0.2s ease;
}

.news-card-excerpt {
  font-size: 13px;
  color: var(--text-sub);
  line-height: 1.6;
  margin-bottom: 12px;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  flex-grow: 1;
}

.news-card-meta {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
}

.news-cat-badge {
  background: rgba(255,106,0,0.12);
  color: var(--primary);
  font-size: 12px;
  font-weight: 600;
  border-radius: var(--radius-sm);
  padding: 2px 10px;
}

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

.news-load-more {
  text-align: center;
}

/* ========== 空态 ========== */
.empty-state {
  background: var(--bg-card);
  border: 1px dashed rgba(255,255,255,0.2);
  border-radius: var(--radius-lg);
  padding: 48px 24px;
  text-align: center;
  grid-column: 1 / -1;
}

.empty-state i {
  font-size: 48px;
  color: var(--text-mute);
  display: block;
  margin-bottom: 12px;
}

.empty-state p {
  font-size: 14px;
  color: var(--text-sub);
  margin-bottom: 16px;
}

/* ========== FAQ ========== */
.faq-section {
  padding: var(--space-xl) 0;
  background: #0e1420;
}

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

.faq-accordion .accordion-item {
  background: var(--bg-card);
  border: 1px solid var(--border-card);
  border-radius: var(--radius-lg) !important;
  margin-bottom: 12px;
  overflow: hidden;
  box-shadow: var(--shadow-card);
}

.faq-accordion .accordion-button {
  background: var(--bg-card);
  color: var(--text-main);
  font-size: 15px;
  font-weight: 600;
  padding: 16px 24px;
  height: 56px;
  box-shadow: none;
  border: none;
  transition: all 0.25s ease;
}

.faq-accordion .accordion-button:not(.collapsed) {
  background: var(--bg-card);
  color: var(--primary);
}

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

.faq-accordion .accordion-button::after {
  display: none;
}

.faq-accordion .accordion-button .bi {
  margin-left: auto;
  font-size: 18px;
  color: var(--text-mute);
  transition: transform 0.3s ease, color 0.3s ease;
}

.faq-accordion .accordion-button:not(.collapsed) .bi {
  transform: rotate(45deg);
  color: var(--primary);
}

.faq-accordion .accordion-body {
  padding: 0 24px 20px;
  font-size: 14px;
  color: var(--text-sub);
  line-height: 1.8;
  background: var(--bg-card);
  border-top: 1px solid rgba(255,255,255,0.04);
}

/* ========== 页脚 ========== */
.footer-main {
  background: #080B11;
  border-top: 3px solid var(--primary);
  padding: 56px 0 24px;
}

.footer-top {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  flex-wrap: wrap;
  gap: 32px;
  margin-bottom: 40px;
}

.footer-brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 18px;
  font-weight: 700;
  color: #fff;
  margin-bottom: 12px;
}

.footer-brand .logo-icon {
  width: 28px; height: 28px;
  border-radius: 6px;
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  display: flex; align-items: center; justify-content: center;
  color: #fff;
  font-size: 14px;
  font-weight: 800;
}

.footer-desc {
  font-size: 13px;
  color: var(--text-mute);
  max-width: 300px;
  line-height: 1.6;
}

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

.footer-links a {
  font-size: 14px;
  color: var(--text-link);
  transition: color 0.2s ease;
}

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

.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.06);
  padding-top: 24px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
  font-size: 13px;
  color: var(--text-mute);
}

/* ========== 响应式 ========== */
@media (min-width: 992px) {
  .navbar-collapse-desktop { display: flex !important; }
}

@media (max-width: 991.98px) {
  .nav-links { display: none; }
  .nav-search { display: none; }
  .nav-toggle { display: flex; }
  .nav-download-btn { margin-right: 8px; }
  
  .hero-section { padding-top: calc(var(--nav-height) + 40px); }
  .hero-title { font-size: 40px; }
}

@media (max-width: 767.98px) {
  .hero-section { min-height: auto; padding-bottom: 40px; }
  .hero-title { font-size: 32px; }
  .section-title { font-size: 24px; }
  
  .feature-grid { grid-template-columns: 1fr; }
  .feature-card-large { min-height: auto; }
  
  .compare-grid { grid-template-columns: 1fr; }
  .compare-card.recommended { transform: none; order: -1; }
  .compare-card.recommended:hover { transform: translateY(-3px); }
  
  .news-grid { grid-template-columns: 1fr; }
  .news-thumb { width: 100px; min-width: 100px; }
  
  .timeline-wrap { padding-left: 32px; }
  .timeline-item { padding-left: 20px; gap: 12px; }
  
  .hero-actions .btn-download,
  .hero-actions .btn-outline { width: 100%; }
  
  .cta-title { font-size: 26px; }
  .cta-btn { width: 100%; }
  
  .footer-top { flex-direction: column; gap: 20px; }
  .footer-bottom { flex-direction: column; text-align: center; }
  
  .nav-search input { width: 180px; }
  .nav-search input:focus { width: 200px; }
}

@media (max-width: 520px) {
  .container { padding-left: 16px; padding-right: 16px; }
  .hero-badges { gap: 6px; }
  .hero-badge { font-size: 12px; padding: 3px 10px; }
  .feature-card-large { padding: 24px; }
  .compare-card { padding: 24px 20px; }
}

/* roulang page: article */
:root {
  --primary: #FF6A00;
  --primary-hover: #FF8534;
  --secondary: #7C5CFF;
  --secondary-hover: #9A82FF;
  --bg-dark: #0B0E14;
  --bg-card: #121824;
  --bg-surface: #1A2230;
  --text-main: #E8EDF7;
  --text-sub: #9AA7BD;
  --text-muted: #5E6B82;
  --success: #33E58A;
  --warning: #FFC24D;
  --border-light: rgba(255, 255, 255, 0.06);
  --border-strong: rgba(255, 255, 255, 0.12);
  --radius-lg: 18px;
  --radius-md: 12px;
  --radius-sm: 8px;
  --shadow-card: 0 8px 32px rgba(0, 0, 0, 0.28);
  --shadow-hover: 0 12px 40px rgba(255, 106, 0, 0.15), 0 4px 12px rgba(0, 0, 0, 0.4);
  --space-sm: 16px;
  --space-md: 24px;
  --space-lg: 40px;
  --space-xl: 64px;
  --font-main: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Source Han Sans SC", "Noto Sans CJK SC", sans-serif;
}

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

html {
  scroll-behavior: smooth;
}

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

a {
  color: #C8D2E4;
  text-decoration: none;
  transition: color 0.3s ease;
}

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

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

.container {
  max-width: 1200px;
  padding-left: 20px;
  padding-right: 20px;
}

/* ===== 导航栏 ===== */
.nav-main {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  height: 64px;
  background: rgba(11, 14, 20, 0.85);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border-light);
  transition: background 0.3s ease, box-shadow 0.3s ease;
}

.nav-main.scrolled {
  background: rgba(11, 14, 20, 0.95);
  box-shadow: 0 4px 24px rgba(0, 0, 0, 0.3);
}

.nav-inner {
  height: 64px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

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

.logo-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  border-radius: 10px;
  background: linear-gradient(135deg, var(--primary), var(--warning));
  color: var(--bg-dark);
  font-size: 18px;
  font-weight: 800;
}

.logo-text {
  font-size: 18px;
  font-weight: 700;
  color: #fff;
  letter-spacing: 0.02em;
}

.logo-text::after {
  content: "";
  display: block;
  height: 2px;
  width: 100%;
  background: linear-gradient(90deg, var(--primary), transparent);
  border-radius: 2px;
  margin-top: 2px;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 28px;
  margin-left: 32px;
}

.nav-item-link {
  font-size: 14px;
  font-weight: 600;
  letter-spacing: 0.02em;
  color: #C8D2E4;
  padding: 6px 2px;
  position: relative;
  transition: color 0.3s ease;
}

.nav-item-link::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--primary);
  border-radius: 2px;
  transition: width 0.3s ease;
}

.nav-item-link:hover,
.nav-item-link.active {
  color: #fff;
}

.nav-item-link:hover::after,
.nav-item-link.active::after {
  width: 100%;
}

.nav-right {
  display: flex;
  align-items: center;
  gap: 12px;
}

.nav-search {
  position: relative;
  display: flex;
  align-items: center;
}

.nav-search input {
  width: 220px;
  height: 38px;
  border-radius: 40px;
  border: 1px solid var(--border-strong);
  background: rgba(11, 14, 20, 0.8);
  color: var(--text-main);
  padding: 0 40px 0 16px;
  font-size: 13px;
  outline: none;
  transition: width 0.3s ease, border-color 0.3s ease, box-shadow 0.3s ease;
}

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

.nav-search input:focus {
  width: 320px;
  border-color: var(--primary);
  box-shadow: 0 0 0 4px rgba(255, 106, 0, 0.15);
}

.nav-search i {
  position: absolute;
  right: 14px;
  font-size: 14px;
  color: var(--text-muted);
  pointer-events: none;
}

.nav-download-btn {
  height: 38px;
  padding: 0 22px;
  border-radius: 40px;
  background: var(--primary);
  color: var(--bg-dark);
  font-size: 14px;
  font-weight: 700;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  transition: background 0.3s ease, transform 0.3s ease, box-shadow 0.3s ease;
  box-shadow: 0 4px 16px rgba(255, 106, 0, 0.3);
}

.nav-download-btn:hover {
  background: var(--primary-hover);
  color: var(--bg-dark);
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(255, 106, 0, 0.4);
}

.nav-toggle {
  display: none;
  width: 38px;
  height: 38px;
  border-radius: 10px;
  border: 1px solid var(--border-strong);
  background: transparent;
  color: var(--text-main);
  font-size: 20px;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: background 0.3s ease, border-color 0.3s ease;
}

.nav-toggle:hover {
  background: rgba(255, 106, 0, 0.1);
  border-color: var(--primary);
}

.mobile-menu {
  display: none;
  position: fixed;
  top: 64px;
  left: 0;
  right: 0;
  z-index: 999;
  background: var(--bg-dark);
  border-bottom: 1px solid var(--border-light);
  padding: 16px 20px 24px;
  transform: translateY(-12px);
  opacity: 0;
  pointer-events: none;
  transition: transform 0.3s ease, opacity 0.3s ease;
}

.mobile-menu.show {
  transform: translateY(0);
  opacity: 1;
  pointer-events: auto;
}

.mobile-menu a {
  display: block;
  padding: 14px 0;
  border-bottom: 1px solid var(--border-light);
  font-size: 15px;
  font-weight: 600;
  color: var(--text-main);
}

.mobile-menu a:last-child {
  border-bottom: none;
}

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

.mobile-menu .mobile-search {
  margin-top: 12px;
}

.mobile-menu .mobile-search input {
  width: 100%;
  height: 44px;
  border-radius: 40px;
  border: 1px solid var(--border-strong);
  background: var(--bg-card);
  color: var(--text-main);
  padding: 0 44px 0 16px;
  font-size: 14px;
  outline: none;
}

/* ===== 文章横幅 ===== */
.article-banner {
  padding: 120px 0 0;
  background: var(--bg-dark);
  position: relative;
  overflow: hidden;
}

.article-banner::before {
  content: "";
  position: absolute;
  top: 64px;
  right: -200px;
  width: 500px;
  height: 500px;
  background: radial-gradient(circle, rgba(124, 92, 255, 0.08), transparent 70%);
  pointer-events: none;
}

.article-banner::after {
  content: "";
  position: absolute;
  top: 120px;
  left: -100px;
  width: 400px;
  height: 400px;
  background: radial-gradient(circle, rgba(255, 106, 0, 0.06), transparent 70%);
  pointer-events: none;
}

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

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

.breadcrumb-custom a {
  color: var(--text-muted);
  transition: color 0.3s ease;
}

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

.breadcrumb-custom .separator {
  color: var(--text-muted);
  opacity: 0.5;
}

.breadcrumb-custom .current {
  color: var(--text-sub);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  max-width: 240px;
}

.article-title {
  font-size: 34px;
  font-weight: 700;
  line-height: 1.35;
  color: var(--text-main);
  margin-bottom: 20px;
  letter-spacing: 0.01em;
}

.article-meta {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 20px;
  margin-bottom: 40px;
  font-size: 13px;
  color: var(--text-sub);
}

.meta-item {
  display: flex;
  align-items: center;
  gap: 6px;
}

.meta-item i {
  font-size: 15px;
  color: var(--text-muted);
}

.meta-divider {
  width: 1px;
  height: 14px;
  background: rgba(255, 255, 255, 0.12);
}

.article-divider {
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(255, 106, 0, 0.5), transparent);
  border: none;
  margin-bottom: 48px;
}

/* ===== 正文阅读区 ===== */
.article-content-wrap {
  position: relative;
  z-index: 1;
  max-width: 760px;
  margin: 0 auto;
  padding: 0 20px 40px;
}

.article-body {
  font-size: 15px;
  line-height: 1.9;
  color: var(--text-main);
}

.article-body h2 {
  font-size: 22px;
  font-weight: 700;
  margin: 40px 0 16px;
  color: var(--text-main);
  line-height: 1.4;
}

.article-body h3 {
  font-size: 18px;
  font-weight: 700;
  margin: 28px 0 12px;
  color: var(--text-main);
}

.article-body p {
  margin-bottom: 20px;
  color: var(--text-main);
}

.article-body ul {
  margin: 12px 0 20px;
  padding-left: 20px;
  list-style: none;
}

.article-body ul li {
  position: relative;
  padding-left: 14px;
  margin-bottom: 8px;
}

.article-body ul li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 11px;
  width: 6px;
  height: 6px;
  background: var(--primary);
  border-radius: 2px;
}

.article-body ol {
  margin: 12px 0 20px;
  padding-left: 20px;
}

.article-body ol li {
  margin-bottom: 8px;
  padding-left: 4px;
}

.article-body blockquote {
  border-left: 4px solid var(--primary);
  background: var(--bg-card);
  border-radius: 8px;
  padding: 16px 20px;
  margin: 20px 0;
  color: var(--text-sub);
  font-style: normal;
}

.article-body img {
  border-radius: var(--radius-md);
  max-width: 100%;
  margin: 16px 0;
}

.article-body figure {
  margin: 16px 0;
}

.article-body figcaption {
  font-size: 13px;
  color: var(--text-muted);
  text-align: center;
  margin-top: 8px;
}

.article-body code {
  background: rgba(255, 255, 255, 0.06);
  padding: 2px 6px;
  border-radius: 4px;
  font-family: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;
  font-size: 0.9em;
  color: var(--warning);
}

.article-body pre {
  background: var(--bg-card);
  border-radius: var(--radius-md);
  padding: 20px;
  overflow-x: auto;
  margin: 20px 0;
  border: 1px solid var(--border-light);
}

.article-body pre code {
  background: none;
  padding: 0;
  color: var(--text-main);
}

.article-body table {
  width: 100%;
  border-collapse: collapse;
  margin: 20px 0;
  font-size: 14px;
}

.article-body th {
  background: var(--bg-card);
  padding: 12px;
  text-align: left;
  font-weight: 700;
  border-bottom: 2px solid var(--border-strong);
}

.article-body td {
  padding: 12px;
  border-bottom: 1px solid var(--border-light);
}

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

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

.article-body strong {
  font-weight: 700;
  color: #fff;
}

/* ===== 空态 ===== */
.empty-state {
  background: var(--bg-card);
  border: 1px dashed rgba(255, 255, 255, 0.2);
  border-radius: var(--radius-lg);
  padding: 60px 40px;
  text-align: center;
}

.empty-state .empty-icon {
  font-size: 48px;
  color: #5E6B82;
  margin-bottom: 16px;
}

.empty-state p {
  color: var(--text-sub);
  font-size: 15px;
  margin-bottom: 20px;
}

.empty-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  height: 42px;
  padding: 0 24px;
  border-radius: 40px;
  border: 1.5px solid var(--secondary);
  background: transparent;
  color: var(--text-main);
  font-size: 14px;
  font-weight: 600;
  transition: background 0.3s ease, transform 0.3s ease;
  cursor: pointer;
}

.empty-btn:hover {
  background: rgba(124, 92, 255, 0.1);
  transform: translateY(-2px);
  color: #fff;
}

/* ===== 底部信息卡 ===== */
.article-footer-card {
  background: linear-gradient(135deg, #121824 0%, #1A2230 100%);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-lg);
  padding: 28px;
  margin: 40px 0 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 16px;
}

.article-footer-card .share-label {
  font-size: 14px;
  font-weight: 600;
  color: var(--text-sub);
  display: flex;
  align-items: center;
  gap: 8px;
}

.share-btns {
  display: flex;
  gap: 8px;
}

.share-btn {
  width: 38px;
  height: 38px;
  border-radius: 50%;
  border: 1px solid var(--border-strong);
  background: transparent;
  color: var(--text-sub);
  font-size: 16px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all 0.3s ease;
}

.share-btn:hover {
  background: rgba(255, 106, 0, 0.1);
  border-color: var(--primary);
  color: var(--primary);
  transform: translateY(-2px);
}

.prev-next-btns {
  display: flex;
  gap: 10px;
}

.prev-next-btn {
  height: 38px;
  padding: 0 20px;
  border-radius: 40px;
  border: 1.5px solid var(--border-strong);
  background: transparent;
  color: var(--text-sub);
  font-size: 13px;
  font-weight: 600;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  transition: all 0.3s ease;
}

.prev-next-btn:hover {
  border-color: var(--secondary);
  color: var(--secondary-hover);
  background: rgba(124, 92, 255, 0.08);
}

/* ===== 相关推荐 ===== */
.related-section {
  padding: 0 0 64px;
  position: relative;
}

.section-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 32px;
}

.section-head h2 {
  font-size: 34px;
  font-weight: 700;
  color: var(--text-main);
  margin: 0;
  position: relative;
}

.section-head h2::after {
  content: "";
  position: absolute;
  bottom: -6px;
  left: 0;
  width: 48px;
  height: 3px;
  background: linear-gradient(90deg, var(--primary), transparent);
  border-radius: 3px;
}

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

.related-card {
  background: var(--bg-card);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: transform 0.3s ease, box-shadow 0.3s ease, border-color 0.3s ease;
  display: block;
}

.related-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-hover);
  border-color: rgba(255, 106, 0, 0.4);
}

.related-card-img {
  aspect-ratio: 16 / 9;
  overflow: hidden;
  background: var(--bg-surface);
  position: relative;
}

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

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

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

.related-card-body h3 {
  font-size: 16px;
  font-weight: 600;
  line-height: 1.5;
  color: var(--text-main);
  margin-bottom: 10px;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  min-height: 48px;
  transition: color 0.3s ease;
}

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

.related-card-body .related-date {
  font-size: 13px;
  color: var(--text-muted);
  display: flex;
  align-items: center;
  gap: 6px;
}

.related-back {
  margin-top: 32px;
  text-align: center;
}

.related-back a {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 14px;
  font-weight: 600;
  color: var(--text-sub);
  transition: color 0.3s ease, gap 0.3s ease;
}

.related-back a:hover {
  color: var(--primary);
  gap: 10px;
}

/* ===== CTA下载区 ===== */
.cta-section {
  padding: 64px 0;
  background: linear-gradient(120deg, #FF6A00 0%, #7C5CFF 100%);
  position: relative;
  overflow: hidden;
}

.cta-section::before {
  content: "";
  position: absolute;
  top: -50%;
  right: -20%;
  width: 400px;
  height: 400px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.08);
  pointer-events: none;
}

.cta-inner {
  max-width: 700px;
  margin: 0 auto;
  text-align: center;
  position: relative;
  z-index: 1;
}

.cta-inner h2 {
  font-size: 34px;
  font-weight: 800;
  color: var(--bg-dark);
  margin-bottom: 12px;
  letter-spacing: 0.02em;
}

.cta-inner p {
  font-size: 15px;
  color: rgba(11, 14, 20, 0.75);
  margin-bottom: 28px;
}

.cta-btn-group {
  display: flex;
  gap: 12px;
  justify-content: center;
  flex-wrap: wrap;
}

.cta-btn {
  height: 48px;
  padding: 0 32px;
  border-radius: 40px;
  border: none;
  background: var(--bg-dark);
  color: #fff;
  font-size: 15px;
  font-weight: 700;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  cursor: pointer;
  transition: transform 0.3s ease, box-shadow 0.3s ease, background 0.3s ease;
}

.cta-btn:hover {
  background: #151A26;
  color: #fff;
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(11, 14, 20, 0.3);
}

.cta-note {
  margin-top: 20px;
  font-size: 13px;
  color: rgba(11, 14, 20, 0.6);
}

/* ===== 页脚 ===== */
.footer-main {
  background: #080B11;
  border-top: 3px solid var(--primary);
  padding: 48px 0 24px;
}

.footer-top {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  flex-wrap: wrap;
  gap: 24px;
  margin-bottom: 40px;
}

.footer-brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 18px;
  font-weight: 700;
  color: #fff;
  margin-bottom: 12px;
}

.footer-desc {
  font-size: 14px;
  color: var(--text-muted);
  max-width: 320px;
  line-height: 1.6;
  margin: 0;
}

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

.footer-links a {
  font-size: 14px;
  color: var(--text-sub);
  transition: color 0.3s ease;
}

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

.footer-bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px;
  padding-top: 24px;
  border-top: 1px solid var(--border-light);
  font-size: 13px;
  color: var(--text-muted);
}

/* ===== 响应式 ===== */
@media (max-width: 991px) {
  .nav-links {
    display: none;
  }
  
  .nav-search {
    display: none;
  }
  
  .nav-toggle {
    display: inline-flex;
  }
  
  .mobile-menu.show {
    display: block;
  }
  
  .article-banner {
    padding-top: 96px;
  }
  
  .article-title {
    font-size: 28px;
  }
  
  .related-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .cta-inner h2 {
    font-size: 28px;
  }
}

@media (max-width: 767px) {
  .container {
    padding-left: 16px;
    padding-right: 16px;
  }
  
  .nav-download-btn {
    padding: 0 16px;
    font-size: 13px;
  }
  
  .nav-download-btn span {
    display: inline;
  }
  
  .article-banner {
    padding-top: 88px;
  }
  
  .article-title {
    font-size: 24px;
  }
  
  .article-meta {
    gap: 12px;
  }
  
  .meta-divider {
    display: none;
  }
  
  .breadcrumb-custom {
    font-size: 13px;
  }
  
  .breadcrumb-custom .current {
    max-width: 160px;
  }
  
  .article-content-wrap {
    padding: 0 16px 32px;
  }
  
  .article-body h2 {
    font-size: 20px;
  }
  
  .article-body h3 {
    font-size: 17px;
  }
  
  .article-footer-card {
    padding: 20px;
    flex-direction: column;
    align-items: flex-start;
  }
  
  .share-btns {
    margin-top: 8px;
  }
  
  .related-grid {
    grid-template-columns: 1fr;
    gap: 16px;
  }
  
  .cta-section {
    padding: 48px 0;
  }
  
  .cta-inner h2 {
    font-size: 24px;
  }
  
  .cta-btn {
    width: 100%;
    max-width: 320px;
    justify-content: center;
  }
  
  .footer-bottom {
    flex-direction: column;
    text-align: center;
  }
  
  .footer-links {
    gap: 16px;
    justify-content: center;
  }
  
  .footer-top {
    flex-direction: column;
    align-items: center;
    text-align: center;
  }
  
  .footer-brand {
    justify-content: center;
  }
  
  .footer-desc {
    margin: 0 auto;
  }
}

@media (max-width: 520px) {
  .logo-text {
    font-size: 16px;
  }
  
  .logo-icon {
    width: 28px;
    height: 28px;
    font-size: 16px;
  }
  
  .nav-download-btn {
    padding: 0 14px;
  }
  
  .nav-download-btn i {
    display: none;
  }
  
  .article-title {
    font-size: 21px;
  }
  
  .article-meta {
    font-size: 12px;
    gap: 10px;
  }
  
  .meta-item i {
    font-size: 13px;
  }
  
  .prev-next-btns {
    width: 100%;
  }
  
  .prev-next-btn {
    flex: 1;
    justify-content: center;
    padding: 0 12px;
  }
  
  .section-head h2 {
    font-size: 26px;
  }
}

/* roulang page: category1 */
:root {
            --primary: #FF6A00;
            --primary-hover: #FF8534;
            --secondary: #7C5CFF;
            --bg-dark: #0B0E14;
            --bg-card: #121824;
            --bg-surface: #1A2230;
            --success: #33E58A;
            --warning: #FFC24D;
            --text-main: #E8EDF7;
            --text-secondary: #9AA7BD;
            --text-muted: #5E6B82;
            --border-light: rgba(255, 255, 255, 0.07);
            --radius-lg: 18px;
            --radius-md: 12px;
            --radius-sm: 8px;
            --shadow-card: 0 8px 32px rgba(0, 0, 0, 0.28);
            --shadow-hover: 0 12px 40px rgba(255, 106, 0, 0.15), 0 4px 12px rgba(0, 0, 0, 0.4);
            --space-xl: 64px;
            --space-2xl: 96px;
        }
        *,
        *::before,
        *::after {
            box-sizing: border-box;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            margin: 0;
            font-family: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Source Han Sans SC", "Noto Sans CJK SC", sans-serif;
            background: var(--bg-dark);
            color: var(--text-main);
            font-size: 15px;
            line-height: 1.8;
            -webkit-font-smoothing: antialiased;
        }
        a {
            color: #C8D2E4;
            text-decoration: none;
            transition: color 0.2s;
        }
        a:hover {
            color: var(--primary);
        }
        img {
            max-width: 100%;
        }
        .container {
            max-width: 1200px;
        }

        /* 导航 */
        .nav-main {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1050;
            background: rgba(11, 14, 20, 0.85);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border-bottom: 1px solid rgba(255, 255, 255, 0.06);
            transition: background 0.3s, box-shadow 0.3s;
        }
        .nav-main.scrolled {
            background: rgba(11, 14, 20, 0.97);
            box-shadow: 0 4px 20px rgba(0, 0, 0, 0.4);
        }
        .nav-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 64px;
        }
        .brand-logo {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            color: #fff;
            font-size: 18px;
            font-weight: 700;
            letter-spacing: 0.02em;
            position: relative;
            flex-shrink: 0;
        }
        .brand-logo:hover {
            color: #fff;
        }
        .logo-icon {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 32px;
            height: 32px;
            border-radius: var(--radius-sm);
            background: linear-gradient(135deg, var(--primary), var(--secondary));
            color: #0B0E14;
            font-weight: 800;
            font-size: 16px;
            box-shadow: 0 0 16px rgba(255, 106, 0, 0.3);
        }
        .logo-text {
            position: relative;
        }
        .logo-text::after {
            content: '';
            position: absolute;
            bottom: -2px;
            left: 0;
            width: 100%;
            height: 3px;
            border-radius: 2px;
            background: linear-gradient(90deg, var(--primary), var(--secondary));
        }
        .nav-links {
            display: flex;
            align-items: center;
            gap: 6px;
            margin-left: 32px;
        }
        .nav-item-link {
            display: inline-block;
            padding: 8px 14px;
            font-size: 14px;
            font-weight: 600;
            color: #C8D2E4;
            border-radius: 20px;
            transition: color 0.2s, background 0.2s;
            position: relative;
        }
        .nav-item-link:hover {
            color: var(--primary);
            background: rgba(255, 106, 0, 0.08);
        }
        .nav-item-link.active {
            color: var(--primary);
            background: rgba(255, 106, 0, 0.1);
        }
        .nav-right {
            display: flex;
            align-items: center;
            gap: 14px;
        }
        .nav-search {
            display: flex;
            align-items: center;
            background: rgba(255, 255, 255, 0.06);
            border: 1px solid rgba(255, 255, 255, 0.1);
            border-radius: 40px;
            padding: 0 14px;
            width: 220px;
            height: 38px;
            transition: width 0.3s, border-color 0.3s, box-shadow 0.3s;
        }
        .nav-search:focus-within {
            width: 320px;
            border-color: var(--primary);
            box-shadow: 0 0 0 4px rgba(255, 106, 0, 0.15);
        }
        .nav-search input {
            flex: 1;
            background: transparent;
            border: none;
            outline: none;
            color: var(--text-main);
            font-size: 14px;
        }
        .nav-search input::placeholder {
            color: var(--text-muted);
        }
        .nav-search i {
            color: var(--text-muted);
            font-size: 14px;
            margin-left: 6px;
        }
        .nav-download-btn {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            background: var(--primary);
            color: #0B0E14;
            font-size: 14px;
            font-weight: 700;
            padding: 8px 20px;
            border-radius: 40px;
            transition: background 0.2s, transform 0.2s, box-shadow 0.2s;
            border: none;
            flex-shrink: 0;
        }
        .nav-download-btn:hover {
            background: var(--primary-hover);
            color: #0B0E14;
            transform: translateY(-2px);
            box-shadow: 0 4px 16px rgba(255, 106, 0, 0.35);
        }
        .nav-toggle {
            display: none;
            background: transparent;
            border: 1px solid rgba(255, 255, 255, 0.15);
            border-radius: 8px;
            color: #C8D2E4;
            font-size: 20px;
            width: 38px;
            height: 38px;
            align-items: center;
            justify-content: center;
        }

        /* 横幅 */
        .page-banner {
            position: relative;
            height: 260px;
            display: flex;
            align-items: center;
            justify-content: center;
            text-align: center;
            overflow: hidden;
            margin-top: 64px;
            background: var(--bg-dark);
        }
        .page-banner .banner-bg {
            position: absolute;
            inset: 0;
            background-size: cover;
            background-position: center;
            z-index: 0;
        }
        .page-banner .banner-overlay {
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(11, 14, 20, 0.75), rgba(11, 14, 20, 0.92));
            z-index: 1;
        }
        .page-banner .banner-content {
            position: relative;
            z-index: 2;
            padding: 0 20px;
        }
        .page-banner h1 {
            font-size: 38px;
            font-weight: 700;
            line-height: 1.3;
            margin: 10px 0 6px;
            color: var(--text-main);
            letter-spacing: 0.01em;
        }
        .page-banner h1 span {
            background: linear-gradient(90deg, var(--primary), var(--warning));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .page-banner .banner-sub {
            font-size: 16px;
            color: var(--text-secondary);
            margin-bottom: 0;
        }
        .breadcrumb-wrap {
            display: flex;
            justify-content: center;
            margin-bottom: 6px;
        }
        .breadcrumb-wrap .breadcrumb {
            background: transparent;
            margin: 0;
            padding: 6px 16px;
            border-radius: 40px;
            border: 1px solid rgba(255, 255, 255, 0.08);
            display: inline-flex;
        }
        .breadcrumb-wrap .breadcrumb-item {
            font-size: 13px;
            color: var(--text-muted);
        }
        .breadcrumb-wrap .breadcrumb-item a {
            color: var(--text-secondary);
        }
        .breadcrumb-wrap .breadcrumb-item a:hover {
            color: var(--primary);
        }
        .breadcrumb-wrap .breadcrumb-item.active {
            color: var(--primary);
        }
        .breadcrumb-wrap .breadcrumb-item+.breadcrumb-item::before {
            content: '/';
            color: var(--text-muted);
            padding: 0 6px;
        }

        /* 板块通用 */
        .section-module {
            padding: 80px 0 60px;
        }
        .section-head {
            text-align: center;
            margin-bottom: 48px;
        }
        .section-head h2 {
            font-size: 34px;
            font-weight: 700;
            line-height: 1.3;
            margin-bottom: 10px;
        }
        .section-head p {
            color: var(--text-secondary);
            font-size: 15px;
            max-width: 640px;
            margin: 0 auto;
        }
        .section-tag {
            display: inline-block;
            background: rgba(124, 92, 255, 0.16);
            color: #B49BFF;
            font-size: 13px;
            font-weight: 600;
            padding: 4px 14px;
            border-radius: 20px;
            margin-bottom: 10px;
        }

        /* 下载方式卡片 */
        .method-card {
            background: var(--bg-card);
            border: 1px solid var(--border-light);
            border-radius: var(--radius-lg);
            padding: 32px 28px;
            height: 100%;
            transition: box-shadow 0.3s, border-color 0.3s, transform 0.3s;
        }
        .method-card:hover {
            border-color: rgba(255, 106, 0, 0.4);
            box-shadow: var(--shadow-hover);
            transform: translateY(-4px);
        }
        .method-icon {
            width: 56px;
            height: 56px;
            border-radius: 16px;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            font-size: 26px;
            background: linear-gradient(135deg, rgba(255, 106, 0, 0.18), rgba(124, 92, 255, 0.18));
            color: var(--primary);
            margin-bottom: 20px;
        }
        .method-card h3 {
            font-size: 19px;
            font-weight: 700;
            margin-bottom: 10px;
        }
        .method-card p {
            color: var(--text-secondary);
            font-size: 14px;
            line-height: 1.7;
            margin-bottom: 18px;
        }
        .method-link {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-size: 14px;
            font-weight: 600;
            color: var(--primary);
            transition: gap 0.2s;
        }
        .method-link:hover {
            color: var(--primary-hover);
            gap: 10px;
        }

        /* 版本对比 */
        .version-compare-section {
            background: var(--bg-card);
            border-top: 1px solid rgba(255, 255, 255, 0.04);
            border-bottom: 1px solid rgba(255, 255, 255, 0.04);
            padding: 80px 0 76px;
        }
        .version-card {
            background: var(--bg-surface);
            border: 1px solid var(--border-light);
            border-radius: var(--radius-lg);
            padding: 32px 28px;
            height: 100%;
            position: relative;
            transition: box-shadow 0.3s, border-color 0.3s, transform 0.3s;
        }
        .version-card:hover {
            box-shadow: var(--shadow-hover);
            transform: translateY(-4px);
        }
        .version-card.featured {
            border: 1.5px solid var(--primary);
            box-shadow: 0 0 32px rgba(255, 106, 0, 0.12), var(--shadow-card);
            background: linear-gradient(160deg, rgba(255, 106, 0, 0.08), rgba(124, 92, 255, 0.05)), var(--bg-surface);
            transform: scale(1.02);
        }
        .version-card.featured:hover {
            box-shadow: 0 12px 44px rgba(255, 106, 0, 0.18), var(--shadow-card);
        }
        .hot-badge {
            position: absolute;
            top: 0px;
            right: 20px;
            background: linear-gradient(90deg, var(--primary), var(--warning));
            color: #0B0E14;
            font-size: 12px;
            font-weight: 700;
            padding: 5px 16px;
            border-radius: 0 0 8px 8px;
            letter-spacing: 0.03em;
        }
        .version-name {
            font-size: 22px;
            font-weight: 700;
            margin-bottom: 4px;
        }
        .version-price {
            color: var(--warning);
            font-size: 16px;
            font-weight: 600;
            margin-bottom: 22px;
        }
        .version-features {
            list-style: none;
            padding: 0;
            margin: 0 0 28px;
        }
        .version-features li {
            display: flex;
            align-items: flex-start;
            gap: 10px;
            padding: 8px 0;
            font-size: 14px;
            color: var(--text-secondary);
            border-bottom: 1px solid rgba(255, 255, 255, 0.04);
        }
        .version-features li:last-child {
            border-bottom: none;
        }
        .version-features li i {
            color: var(--success);
            font-size: 15px;
            line-height: 1.6;
            flex-shrink: 0;
        }
        .version-features li i.bi-dash {
            color: var(--text-muted);
        }
        .btn-version {
            display: inline-block;
            width: 100%;
            text-align: center;
            padding: 12px 20px;
            border-radius: 40px;
            font-size: 15px;
            font-weight: 700;
            border: 1.5px solid var(--primary);
            color: var(--primary);
            background: transparent;
            transition: background 0.2s, color 0.2s, transform 0.2s, box-shadow 0.2s;
        }
        .btn-version:hover {
            background: rgba(255, 106, 0, 0.1);
            color: var(--primary);
            transform: translateY(-2px);
        }
        .btn-version.featured-btn {
            background: var(--primary);
            color: #0B0E14;
            border-color: var(--primary);
        }
        .btn-version.featured-btn:hover {
            background: var(--primary-hover);
            color: #0B0E14;
            box-shadow: 0 6px 20px rgba(255, 106, 0, 0.3);
        }

        /* 下载流程时间线 */
        .timeline-section {
            padding: 80px 0 60px;
        }
        .download-timeline {
            max-width: 800px;
            margin: 0 auto;
            position: relative;
            padding-left: 0;
        }
        .download-timeline::before {
            content: '';
            position: absolute;
            left: 30px;
            top: 10px;
            bottom: 10px;
            width: 2px;
            background: linear-gradient(180deg, var(--primary), var(--secondary), rgba(124, 92, 255, 0.1));
            border-radius: 2px;
        }
        .timeline-item {
            position: relative;
            padding: 0 0 40px 76px;
        }
        .timeline-item:last-child {
            padding-bottom: 0;
        }
        .timeline-step {
            position: absolute;
            left: 16px;
            top: 0;
            width: 30px;
            height: 30px;
            border-radius: 50%;
            background: var(--bg-card);
            border: 2px solid var(--primary);
            color: var(--primary);
            font-size: 12px;
            font-weight: 700;
            display: flex;
            align-items: center;
            justify-content: center;
            z-index: 1;
            box-shadow: 0 0 12px rgba(255, 106, 0, 0.3);
        }
        .timeline-item.current .timeline-step {
            background: var(--success);
            border-color: var(--success);
            color: #0B0E14;
            box-shadow: 0 0 16px rgba(51, 229, 138, 0.45);
        }
        .timeline-content {
            background: var(--bg-card);
            border: 1px solid var(--border-light);
            border-radius: var(--radius-lg);
            padding: 24px 28px;
            transition: box-shadow 0.3s, border-color 0.3s;
        }
        .timeline-content:hover {
            border-color: rgba(124, 92, 255, 0.4);
            box-shadow: 0 8px 32px rgba(0, 0, 0, 0.3);
        }
        .timeline-content h3 {
            font-size: 18px;
            font-weight: 700;
            margin-bottom: 6px;
        }
        .timeline-content p {
            color: var(--text-secondary);
            font-size: 14px;
            margin-bottom: 0;
        }

        /* 系统要求 */
        .requirement-section {
            background: var(--bg-dark);
            padding: 80px 0 60px;
        }
        .requirement-card {
            background: var(--bg-card);
            border: 1px solid var(--border-light);
            border-radius: var(--radius-lg);
            padding: 32px;
            height: 100%;
            transition: box-shadow 0.3s, border-color 0.3s;
        }
        .requirement-card:hover {
            border-color: rgba(124, 92, 255, 0.35);
            box-shadow: 0 8px 32px rgba(0, 0, 0, 0.3);
        }
        .requirement-card .req-icon {
            font-size: 28px;
            color: var(--secondary);
            margin-bottom: 16px;
            display: inline-block;
        }
        .requirement-card h3 {
            font-size: 20px;
            font-weight: 700;
            margin-bottom: 14px;
        }
        .requirement-card ul {
            list-style: none;
            padding: 0;
            margin: 0;
        }
        .requirement-card ul li {
            display: flex;
            align-items: center;
            gap: 10px;
            padding: 6px 0;
            color: var(--text-secondary);
            font-size: 14px;
        }
        .requirement-card ul li i {
            color: var(--success);
            font-size: 14px;
            flex-shrink: 0;
        }

        /* 下载提示横幅 */
        .banner-tip {
            margin-top: 40px;
            border-radius: var(--radius-lg);
            background-image: url('/assets/images/coverpic/cover-1.png');
            background-size: cover;
            background-position: center;
            position: relative;
            overflow: hidden;
            padding: 48px 40px;
            text-align: center;
        }
        .banner-tip::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(255, 106, 0, 0.42), rgba(124, 92, 255, 0.38));
        }
        .banner-tip .tip-content {
            position: relative;
            z-index: 1;
        }
        .banner-tip h3 {
            font-size: 26px;
            font-weight: 700;
            color: #fff;
            margin-bottom: 8px;
            text-shadow: 0 2px 12px rgba(0, 0, 0, 0.4);
        }
        .banner-tip p {
            color: rgba(255, 255, 255, 0.92);
            font-size: 15px;
            margin-bottom: 18px;
        }
        .btn-tip {
            display: inline-block;
            background: #fff;
            color: #0B0E14;
            font-weight: 700;
            font-size: 14px;
            padding: 10px 30px;
            border-radius: 40px;
            transition: transform 0.2s, box-shadow 0.2s;
        }
        .btn-tip:hover {
            color: #0B0E14;
            transform: translateY(-2px);
            box-shadow: 0 6px 20px rgba(0, 0, 0, 0.25);
        }

        /* FAQ */
        .faq-section {
            background: var(--bg-card);
            border-top: 1px solid rgba(255, 255, 255, 0.04);
            padding: 80px 0 60px;
        }
        .faq-accordion {
            max-width: 820px;
            margin: 0 auto;
        }
        .faq-accordion .accordion-item {
            background: var(--bg-card);
            border: 1px solid rgba(255, 255, 255, 0.06);
            border-radius: var(--radius-md);
            margin-bottom: 14px;
            overflow: hidden;
        }
        .faq-accordion .accordion-button {
            background: transparent;
            color: var(--text-main);
            font-size: 16px;
            font-weight: 600;
            padding: 14px 24px;
            height: auto;
            min-height: 56px;
            box-shadow: none;
            border: none;
            transition: color 0.2s;
        }
        .faq-accordion .accordion-button:not(.collapsed) {
            background: rgba(255, 106, 0, 0.06);
            color: var(--primary);
            box-shadow: none;
        }
        .faq-accordion .accordion-button::after {
            background-image: none;
            content: '+';
            font-size: 22px;
            font-weight: 400;
            color: var(--text-muted);
            transform: none;
            transition: transform 0.3s, color 0.2s;
            display: inline-flex;
            align-items: center;
            justify-content: center;
        }
        .faq-accordion .accordion-button:not(.collapsed)::after {
            transform: rotate(45deg);
            color: var(--primary);
        }
        .faq-accordion .accordion-button:focus {
            box-shadow: 0 0 0 3px rgba(255, 106, 0, 0.12);
            border-radius: 12px;
        }
        .faq-accordion .accordion-body {
            padding: 0 24px 20px;
            color: var(--text-secondary);
            font-size: 14px;
            line-height: 1.8;
        }

        /* 相邻分类跳转 */
        .adjacent-section {
            padding: 64px 0 80px;
        }
        .adjacent-card {
            display: flex;
            align-items: center;
            justify-content: space-between;
            background: var(--bg-card);
            border: 1.5px solid rgba(124, 92, 255, 0.4);
            border-radius: var(--radius-lg);
            padding: 24px 28px;
            transition: box-shadow 0.3s, border-color 0.3s, transform 0.2s;
            color: var(--text-main);
            height: 100%;
        }
        .adjacent-card:hover {
            border-color: var(--secondary);
            box-shadow: 0 8px 32px rgba(124, 92, 255, 0.15);
            transform: translateY(-3px);
            color: var(--text-main);
        }
        .adjacent-card .adj-icon {
            font-size: 28px;
            color: var(--secondary);
            margin-right: 16px;
        }
        .adjacent-card .adj-title {
            font-size: 18px;
            font-weight: 700;
            margin-bottom: 2px;
        }
        .adjacent-card .adj-desc {
            font-size: 13px;
            color: var(--text-muted);
        }
        .adjacent-card .adj-arrow {
            font-size: 20px;
            color: var(--secondary);
            margin-left: 12px;
            transition: transform 0.2s;
        }
        .adjacent-card:hover .adj-arrow {
            transform: translateX(4px);
        }

        /* 页脚 */
        .footer-main {
            background: #080B11;
            border-top: 3px solid var(--primary);
            padding: 48px 0 28px;
        }
        .footer-top {
            display: flex;
            justify-content: space-between;
            align-items: flex-start;
            flex-wrap: wrap;
            gap: 24px;
            margin-bottom: 32px;
        }
        .footer-brand {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 18px;
            font-weight: 700;
            color: #fff;
            margin-bottom: 8px;
        }
        .footer-desc {
            font-size: 13px;
            color: var(--text-muted);
            margin-bottom: 0;
            max-width: 320px;
        }
        .footer-links {
            display: flex;
            gap: 20px;
            flex-wrap: wrap;
        }
        .footer-links a {
            font-size: 14px;
            color: var(--text-secondary);
            transition: color 0.2s;
        }
        .footer-links a:hover {
            color: var(--primary);
        }
        .footer-bottom {
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 10px;
            border-top: 1px solid rgba(255, 255, 255, 0.05);
            padding-top: 20px;
            font-size: 13px;
            color: var(--text-muted);
        }

        /* 响应式 */
        @media (max-width: 991px) {
            .nav-links {
                display: none;
                position: absolute;
                top: 64px;
                left: 0;
                right: 0;
                background: #0B0E14;
                flex-direction: column;
                align-items: flex-start;
                gap: 0;
                padding: 12px 24px 16px;
                border-bottom: 1px solid rgba(255, 255, 255, 0.06);
                margin-left: 0;
                box-shadow: 0 8px 24px rgba(0, 0, 0, 0.5);
            }
            .nav-links.show {
                display: flex;
            }
            .nav-links .nav-item-link {
                width: 100%;
                padding: 12px 8px;
                border-bottom: 1px solid rgba(255, 255, 255, 0.06);
                border-radius: 0;
                font-size: 15px;
            }
            .nav-links .nav-item-link:last-child {
                border-bottom: none;
            }
            .nav-toggle {
                display: inline-flex;
            }
            .nav-search {
                display: none;
            }
            .section-module {
                padding: 60px 0 40px;
            }
            .section-head h2 {
                font-size: 26px;
            }
            .page-banner {
                height: 220px;
            }
            .page-banner h1 {
                font-size: 30px;
            }
            .version-card.featured {
                transform: none;
            }
        }
        @media (max-width: 767px) {
            .nav-download-btn {
                padding: 8px 14px;
                font-size: 13px;
            }
            .nav-download-btn i {
                display: none;
            }
            .brand-logo {
                font-size: 16px;
            }
            .logo-icon {
                width: 28px;
                height: 28px;
                font-size: 14px;
            }
            .page-banner {
                height: 190px;
            }
            .page-banner h1 {
                font-size: 24px;
            }
            .page-banner .banner-sub {
                font-size: 14px;
            }
            .section-head h2 {
                font-size: 22px;
            }
            .section-module {
                padding: 48px 0 32px;
            }
            .method-card {
                padding: 24px 20px;
            }
            .download-timeline {
                padding-left: 0;
            }
            .download-timeline::before {
                left: 22px;
            }
            .timeline-item {
                padding: 0 0 32px 56px;
            }
            .timeline-step {
                left: 11px;
                width: 24px;
                height: 24px;
                font-size: 10px;
            }
            .timeline-content {
                padding: 18px 20px;
            }
            .banner-tip {
                padding: 32px 20px;
            }
            .banner-tip h3 {
                font-size: 20px;
            }
            .footer-top {
                flex-direction: column;
                gap: 16px;
            }
            .footer-bottom {
                flex-direction: column;
                text-align: center;
            }
            .adjacent-card {
                padding: 18px 20px;
            }
        }

/* roulang page: category2 */
:root {
  --primary: #FF6A00;
  --secondary: #7C5CFF;
  --bg: #0B0E14;
  --bg-secondary: #121824;
  --surface: #1A2230;
  --success: #33E58A;
  --warning: #FFC24D;
  --text-main: #E8EDF7;
  --text-secondary: #9AA7BD;
  --text-muted: #5E6B82;
  --border-light: rgba(255,255,255,0.07);
  --radius-lg: 18px;
  --radius-sm: 8px;
  --radius-pill: 40px;
  --shadow-card: 0 8px 32px rgba(0,0,0,0.28);
  --shadow-hover: 0 12px 40px rgba(255,106,0,0.15), 0 4px 12px rgba(0,0,0,0.4);
  --space-sm: 16px;
  --space-md: 24px;
  --space-lg: 40px;
  --space-xl: 64px;
  --space-2xl: 96px;
  --font-family: "PingFang SC","Hiragino Sans GB","Microsoft YaHei","Source Han Sans SC","Noto Sans CJK SC",sans-serif;
}
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{
  font-family:var(--font-family);
  background:var(--bg);
  color:var(--text-main);
  font-size:15px;
  line-height:1.8;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
a{color:#C8D2E4;text-decoration:none;transition:color .25s ease}
a:hover{color:var(--primary)}
img{max-width:100%;display:block}
ul,ol{list-style:none}
input,button,textarea{font-family:inherit;outline:none}
.container{max-width:1200px}

/* ===== Nav ===== */
.nav-main{
  position:fixed;top:0;left:0;width:100%;height:64px;
  z-index:1030;
  background:rgba(11,14,20,.85);
  backdrop-filter:blur(12px);
  -webkit-backdrop-filter:blur(12px);
  border-bottom:1px solid rgba(255,255,255,.06);
  transition:background .3s ease,box-shadow .3s ease;
}
.nav-main.scrolled{background:rgba(11,14,20,.97);box-shadow:0 4px 24px rgba(0,0,0,.5)}
.nav-inner{display:flex;align-items:center;justify-content:space-between;height:64px}
.brand-logo{display:flex;align-items:center;gap:10px;flex-shrink:0}
.logo-icon{
  width:28px;height:28px;border-radius:8px;
  background:linear-gradient(135deg,var(--primary),var(--secondary));
  display:flex;align-items:center;justify-content:center;
  font-size:15px;font-weight:700;color:#0B0E14;
  box-shadow:0 0 16px rgba(255,106,0,.35);
}
.logo-text{font-size:17px;font-weight:700;color:#fff;letter-spacing:.02em;white-space:nowrap}
.nav-links{display:flex;align-items:center;gap:6px;margin-left:32px}
.nav-item-link{
  display:block;padding:7px 16px;border-radius:20px;
  font-size:14px;font-weight:600;color:#C8D2E4;letter-spacing:.02em;
  transition:all .25s ease;
}
.nav-item-link:hover{color:var(--primary)}
.nav-item-link.active{background:rgba(255,106,0,.12);color:var(--primary)}
.nav-right{display:flex;align-items:center;gap:14px}
.nav-search{position:relative;width:220px;transition:width .3s ease}
.nav-search:focus-within{width:320px}
.nav-search input{
  width:100%;height:40px;border-radius:40px;
  background:var(--bg);border:1px solid rgba(255,255,255,.12);
  padding:0 16px 0 40px;color:var(--text-main);font-size:13px;
  transition:border-color .3s ease,box-shadow .3s ease;
}
.nav-search input::placeholder{color:var(--text-muted)}
.nav-search input:focus{border-color:var(--primary);box-shadow:0 0 0 4px rgba(255,106,0,.2)}
.nav-search i{position:absolute;left:14px;top:50%;transform:translateY(-50%);color:var(--text-muted);font-size:14px;pointer-events:none}
.nav-download-btn{
  display:inline-flex;align-items:center;gap:6px;
  height:40px;padding:0 20px;border-radius:40px;
  background:var(--primary);color:#0B0E14;
  font-size:14px;font-weight:700;
  transition:background .25s ease,transform .25s ease,box-shadow .25s ease;
  white-space:nowrap;
}
.nav-download-btn:hover{background:#FF8534;color:#0B0E14;transform:translateY(-2px);box-shadow:0 6px 20px rgba(255,106,0,.35)}
.nav-toggle{
  display:none;width:40px;height:40px;border-radius:10px;
  background:rgba(255,255,255,.06);border:1px solid var(--border-light);
  color:#C8D2E4;font-size:18px;align-items:center;justify-content:center;
}
.nav-toggle:hover{color:var(--primary);border-color:rgba(255,106,0,.4)}

/* ===== Category Banner ===== */
.cat-banner{
  position:relative;margin-top:64px;min-height:260px;
  display:flex;align-items:center;
  background:linear-gradient(135deg,rgba(11,14,20,.55),rgba(11,14,20,.88)),url('/assets/images/backpic/back-2.webp') center/cover no-repeat;
  border-bottom:1px solid rgba(255,255,255,.05);
  overflow:hidden;
}
.cat-banner::after{
  content:'';position:absolute;right:-120px;top:-120px;width:320px;height:320px;
  background:radial-gradient(circle,rgba(124,92,255,.25),transparent 70%);
  pointer-events:none;
}
.cat-banner-inner{position:relative;z-index:2;padding:48px 0}
.breadcrumb-custom{display:flex;align-items:center;gap:10px;font-size:14px;color:var(--text-muted);margin-bottom:14px}
.breadcrumb-custom a{color:var(--text-muted)}
.breadcrumb-custom a:hover{color:var(--primary)}
.breadcrumb-custom .sep{color:var(--text-muted);opacity:.6}
.cat-banner h1{
  font-size:38px;font-weight:700;line-height:1.25;color:var(--text-main);
  margin-bottom:12px;
}
.cat-banner h1 span{background:linear-gradient(90deg,var(--primary),var(--warning));-webkit-background-clip:text;background-clip:text;color:transparent}
.cat-banner p{font-size:16px;color:var(--text-secondary);max-width:640px}

/* ===== Section ===== */
.section-block{padding:var(--space-xl) 0}
.section-head{text-align:center;max-width:720px;margin:0 auto 48px}
.section-tag{
  display:inline-block;padding:4px 14px;border-radius:8px;
  background:rgba(124,92,255,.16);color:#B49BFF;
  font-size:13px;font-weight:600;margin-bottom:14px;
}
.section-head h2{font-size:34px;font-weight:700;line-height:1.25;margin-bottom:12px}
.section-head p{font-size:15px;color:var(--text-secondary)}
.divider-gradient{
  width:100%;height:1px;
  background:linear-gradient(90deg,transparent,rgba(255,106,0,.5),transparent);
  margin:40px 0;
}

/* ===== Overview/Stats ===== */
.overview-grid{display:grid;grid-template-columns:1.2fr 1fr;gap:24px;align-items:stretch}
.overview-text{background:var(--bg-secondary);border:1px solid var(--border-light);border-radius:18px;padding:32px;box-shadow:var(--shadow-card)}
.overview-text h3{font-size:22px;font-weight:700;margin-bottom:16px}
.overview-text p{color:var(--text-secondary);font-size:15px;line-height:1.9;margin-bottom:12px}
.overview-text ul{margin-top:16px}
.overview-text ul li{position:relative;padding-left:22px;color:var(--text-secondary);font-size:14px;margin-bottom:8px}
.overview-text ul li::before{
  content:'';position:absolute;left:0;top:9px;width:8px;height:8px;border-radius:2px;
  background:var(--primary);
}
.stats-wrap{display:grid;grid-template-columns:1fr 1fr;gap:16px}
.stat-card{
  background:var(--surface);border:1px solid var(--border-light);border-radius:18px;
  padding:24px;text-align:center;
  box-shadow:var(--shadow-card);
  transition:transform .3s ease,border-color .3s ease,box-shadow .3s ease;
}
.stat-card:hover{transform:translateY(-4px);border-color:rgba(255,106,0,.4);box-shadow:var(--shadow-hover)}
.stat-card .num{
  font-size:32px;font-weight:700;line-height:1.2;margin-bottom:4px;
  background:linear-gradient(90deg,var(--primary),var(--warning));
  -webkit-background-clip:text;background-clip:text;color:transparent;
  font-variant-numeric:tabular-nums;
}
.stat-card .label{font-size:13px;color:var(--text-secondary)}
.stat-card:first-child .num{color:var(--primary)}
.stat-card:nth-child(3){grid-column:1/-1}
.stat-card:nth-child(3) .num{
  background:linear-gradient(90deg,var(--success),#7BE7B0);
  -webkit-background-clip:text;background-clip:text;color:transparent;
}

/* ===== Feature Cards ===== */
.feature-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.feature-card{
  background:var(--bg-secondary);border:1px solid var(--border-light);border-radius:18px;
  padding:28px 24px;position:relative;overflow:hidden;
  box-shadow:var(--shadow-card);
  transition:transform .3s ease,border-color .3s ease,box-shadow .3s ease;
}
.feature-card::before{
  content:'';position:absolute;top:0;left:0;right:0;height:3px;
  background:linear-gradient(90deg,var(--primary),var(--secondary));
  opacity:0;transition:opacity .3s ease;
}
.feature-card:hover{transform:translateY(-6px);border-color:rgba(255,106,0,.4);box-shadow:var(--shadow-hover)}
.feature-card:hover::before{opacity:1}
.feature-icon{
  width:52px;height:52px;border-radius:14px;
  display:flex;align-items:center;justify-content:center;
  font-size:24px;margin-bottom:18px;
  background:rgba(124,92,255,.14);color:#B49BFF;
}
.feature-card:nth-child(even) .feature-icon{background:rgba(255,106,0,.12);color:var(--primary)}
.feature-card h3{font-size:18px;font-weight:600;margin-bottom:10px}
.feature-card p{font-size:14px;color:var(--text-secondary);line-height:1.8}
.feature-badge{
  display:inline-block;margin-top:14px;padding:3px 10px;border-radius:8px;
  background:rgba(255,106,0,.12);color:var(--primary);font-size:12px;font-weight:600;
}

/* ===== Timeline ===== */
.timeline-wrap{max-width:820px;margin:0 auto;position:relative;padding:8px 0}
.timeline-wrap::before{
  content:'';position:absolute;left:18px;top:0;bottom:0;width:2px;
  background:linear-gradient(180deg,var(--secondary),rgba(255,106,0,.4));
}
.timeline-item{position:relative;padding-left:60px;margin-bottom:36px}
.timeline-item:last-child{margin-bottom:0}
.timeline-dot{
  position:absolute;left:8px;top:4px;width:22px;height:22px;border-radius:50%;
  background:var(--primary);border:4px solid rgba(255,106,0,.25);
  box-shadow:0 0 0 6px rgba(255,106,0,.12);
}
.timeline-item.current .timeline-dot{background:var(--success);border-color:rgba(51,229,138,.3);box-shadow:0 0 0 6px rgba(51,229,138,.14)}
.timeline-card{
  background:var(--bg-secondary);border:1px solid var(--border-light);border-radius:16px;
  padding:22px 24px;box-shadow:var(--shadow-card);
  transition:border-color .3s ease,box-shadow .3s ease,transform .3s ease;
}
.timeline-card:hover{border-color:rgba(124,92,255,.4);box-shadow:var(--shadow-hover);transform:translateX(4px)}
.timeline-step{display:inline-block;font-size:13px;font-weight:700;color:#B49BFF;background:rgba(124,92,255,.14);padding:3px 12px;border-radius:8px;margin-bottom:8px}
.timeline-item.current .timeline-step{color:var(--success);background:rgba(51,229,138,.12)}
.timeline-card h3{font-size:18px;font-weight:600;margin-bottom:6px}
.timeline-card p{font-size:14px;color:var(--text-secondary);margin-bottom:0}

/* ===== Tips block ===== */
.tips-block{
  max-width:820px;margin:0 auto;
  background:linear-gradient(135deg,rgba(255,106,0,.08),rgba(124,92,255,.08));
  border:1px solid rgba(255,106,0,.2);border-radius:18px;
  padding:32px;
}
.tips-block h3{font-size:20px;font-weight:700;margin-bottom:18px;display:flex;align-items:center;gap:10px}
.tips-block h3 i{color:var(--warning)}
.tips-grid{display:grid;grid-template-columns:1fr 1fr;gap:14px}
.tips-grid li{display:flex;align-items:flex-start;gap:10px;font-size:14px;color:var(--text-secondary)}
.tips-grid li i{color:var(--success);margin-top:5px;font-size:15px}

/* ===== FAQ ===== */
.faq-wrap{max-width:820px;margin:0 auto}
.accordion-item{
  background:var(--bg-secondary) !important;
  border:1px solid var(--border-light) !important;
  border-radius:12px !important;
  margin-bottom:14px;
  overflow:hidden;
  box-shadow:var(--shadow-card);
}
.accordion-button{
  background:transparent !important;
  color:var(--text-main) !important;
  font-size:15px;font-weight:600;
  padding:16px 20px;
  box-shadow:none !important;
  border-radius:12px !important;
  min-height:48px;
}
.accordion-button:focus{box-shadow:0 0 0 4px rgba(255,106,0,.2) !important}
.accordion-button:not(.collapsed){color:var(--primary) !important;background:transparent !important}
.accordion-button::after{display:none}
.accordion-button .bi-plus-lg{transition:transform .3s ease;color:var(--text-secondary)}
.accordion-button:not(.collapsed) .bi-plus-lg{transform:rotate(45deg);color:var(--primary)}
.accordion-body{background:var(--bg-secondary);color:var(--text-secondary);font-size:14px;line-height:1.9;padding:0 20px 18px;border-top:1px solid transparent}
.accordion-button:not(.collapsed){border-bottom:1px solid var(--border-light)}

/* ===== CTA ===== */
.cta-block{
  background:linear-gradient(120deg,var(--primary) 0%,var(--secondary) 100%);
  border-radius:18px;padding:56px 40px;text-align:center;
  position:relative;overflow:hidden;
}
.cta-block::before{
  content:'';position:absolute;top:-60px;right:-60px;width:180px;height:180px;border-radius:50%;
  background:rgba(255,255,255,.1);
}
.cta-block h2{font-size:34px;font-weight:700;color:#0B0E14;margin-bottom:10px}
.cta-block p{font-size:15px;color:rgba(11,14,20,.75);margin-bottom:28px}
.cta-btn{
  display:inline-flex;align-items:center;gap:8px;
  padding:14px 36px;border-radius:40px;border:none;
  background:#0B0E14;color:var(--primary);
  font-size:15px;font-weight:700;
  transition:transform .3s ease,box-shadow .3s ease;
}
.cta-btn:hover{transform:translateY(-3px);box-shadow:0 8px 24px rgba(0,0,0,.35);color:var(--primary)}
.cta-note{display:block;margin-top:16px;font-size:13px;color:rgba(11,14,20,.7)}

/* ===== Adjacent category ===== */
.adjacent-links{display:grid;grid-template-columns:1fr 1fr;gap:20px;max-width:820px;margin:0 auto}
.adjacent-item{
  display:flex;align-items:center;justify-content:space-between;
  background:var(--bg-secondary);border:1.5px solid var(--secondary);
  border-radius:16px;padding:20px 24px;
  transition:transform .3s ease,box-shadow .3s ease,background .3s ease;
}
.adjacent-item:hover{transform:translateY(-4px);background:rgba(124,92,255,.08);box-shadow:0 8px 24px rgba(124,92,255,.2)}
.adjacent-item .adj-label{font-size:13px;color:var(--text-muted)}
.adjacent-item .adj-name{font-size:17px;font-weight:600;color:var(--text-main);margin-top:2px}
.adjacent-item i{color:var(--secondary);font-size:20px}

/* ===== Footer ===== */
.footer-main{background:#080B11;border-top:3px solid var(--primary);margin-top:0}
.footer-top{
  display:flex;justify-content:space-between;align-items:flex-start;
  gap:32px;padding:48px 0 32px;flex-wrap:wrap;
}
.footer-brand{display:flex;align-items:center;gap:10px;font-size:18px;font-weight:700;color:#fff}
.footer-desc{font-size:13px;color:var(--text-muted);margin-top:8px;max-width:280px}
.footer-links{display:flex;gap:20px;flex-wrap:wrap}
.footer-links a{font-size:14px;color:var(--text-secondary)}
.footer-links a:hover{color:var(--primary)}
.footer-bottom{
  display:flex;justify-content:space-between;align-items:center;
  border-top:1px solid rgba(255,255,255,.06);
  padding:20px 0 24px;font-size:13px;color:var(--text-muted);flex-wrap:wrap;gap:8px;
}

/* ===== Responsive ===== */
@media (max-width:991px){
  .nav-links{display:none}
  .nav-right{width:auto}
  .nav-search{width:160px}
  .nav-search:focus-within{width:200px}
  .nav-toggle{display:flex}
  .feature-grid{grid-template-columns:1fr 1fr}
  .overview-grid{grid-template-columns:1fr}
  .stat-card:nth-child(3){grid-column:auto}
  .nav-mobile-open .nav-links{
    display:flex;flex-direction:column;align-items:flex-start;gap:0;
    position:fixed;top:64px;left:0;right:0;
    background:var(--bg);border-bottom:1px solid var(--border-light);
    padding:12px 24px 24px;
  }
  .nav-mobile-open .nav-links .nav-item-link{
    width:100%;border-bottom:1px solid rgba(255,255,255,.06);border-radius:0;
    padding:12px 0;
  }
}
@media (max-width:767px){
  .cat-banner{margin-top:64px}
  .cat-banner h1{font-size:26px}
  .cat-banner p{font-size:14px}
  .section-block{padding:48px 0}
  .section-head h2{font-size:24px}
  .feature-grid{grid-template-columns:1fr}
  .tips-grid{grid-template-columns:1fr}
  .timeline-item{padding-left:48px}
  .timeline-wrap::before{left:13px}
  .timeline-dot{width:18px;height:18px;left:4px;top:6px}
  .nav-search{display:none}
  .cta-block{padding:40px 24px}
  .cta-block h2{font-size:26px}
  .adjacent-links{grid-template-columns:1fr}
  .nav-download-btn{padding:0 14px;font-size:13px}
  .nav-mobile-open .nav-search{display:block;width:100%;margin-bottom:12px;margin-top:8px}
  .nav-mobile-open .nav-links{position:fixed;top:64px;left:0;right:0;background:var(--bg);border-bottom:1px solid var(--border-light);padding:16px 24px 24px;z-index:1029;overflow-y:auto;max-height:calc(100vh - 64px)}
  .nav-mobile-open .nav-search input{width:100%}
}