/* roulang page: index */
:root {
  --bg-page: #07090F;
  --bg-level2: #0D1225;
  --bg-level3: #111731;
  --primary: #2E6BFF;
  --accent: #22D3EE;
  --purple: #7C3AED;
  --text-main: #E6EAF2;
  --text-secondary: #98A2B3;
  --text-weak: #667085;
  --success: #10B981;
  --danger: #F43F5E;
  --glass-bg: rgba(255,255,255,0.04);
  --glass-border: rgba(255,255,255,0.08);
  --glass-border-strong: rgba(255,255,255,0.12);
  --radius-lg: 24px;
  --radius-md: 16px;
  --radius-sm: 12px;
  --radius-xs: 8px;
  --shadow-card: 0 8px 32px rgba(0,0,0,0.35);
  --shadow-card-hover: 0 16px 48px rgba(0,0,0,0.50), 0 0 0 1px rgba(46,107,255,0.25);
  --shadow-btn: 0 0 20px rgba(46,107,255,0.40);
  --shadow-btn-hover: 0 0 32px rgba(46,107,255,0.60);
  --space-section: 96px;
  --space-section-mobile: 56px;
  --font-family: -apple-system, "PingFang SC", "Microsoft YaHei", "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-page);
  color: var(--text-main);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}
a { color: inherit; text-decoration: none; transition: color 0.2s ease; }
img { max-width: 100%; display: block; }
input, textarea, select, button { font-family: inherit; font-size: inherit; color: inherit; }
ul, ol { list-style: none; }
.container { max-width: 1200px; margin: 0 auto; padding: 0 20px; }
.completed { display: none; }

/* ========== 按钮 ========== */
.btn {
  display: inline-flex; align-items: center; justify-content: center;
  padding: 12px 28px; border-radius: var(--radius-xs);
  font-size: 15px; font-weight: 600; line-height: 1.4;
  border: 1px solid transparent; cursor: pointer;
  transition: all 0.25s ease; letter-spacing: 0.02em;
}
.btn:focus-visible {
  outline: 2px solid var(--primary); outline-offset: 2px;
}
.btn-primary {
  background: linear-gradient(135deg, var(--primary), var(--accent));
  color: #fff; box-shadow: var(--shadow-btn);
}
.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-btn-hover);
  filter: brightness(1.05);
}
.btn-primary:active {
  transform: translateY(1px);
  box-shadow: 0 0 10px rgba(46,107,255,0.20);
}
.btn-ghost {
  background: transparent;
  border-color: rgba(255,255,255,0.14);
  color: var(--text-main);
}
.btn-ghost:hover {
  background: rgba(255,255,255,0.06);
  border-color: var(--primary);
}
.btn-outline {
  background: transparent;
  border-color: rgba(255,255,255,0.14);
  color: var(--text-main);
  padding: 10px 22px;
}
.btn-outline:hover {
  background: rgba(255,255,255,0.06);
  border-color: var(--primary);
}
.btn-block { width: 100%; }
.btn-purple {
  background: linear-gradient(135deg, var(--primary), var(--purple));
  color: #fff; box-shadow: 0 0 20px rgba(124,58,237,0.30);
}
.btn-purple:hover {
  transform: translateY(-2px);
  box-shadow: 0 0 32px rgba(124,58,237,0.45);
}
.btn-nav { padding: 8px 20px; font-size: 14px; }

/* ========== 导航 ========== */
.site-header {
  position: fixed; top: 0; left: 0; right: 0; z-index: 1000;
  height: 72px;
  background: rgba(7,9,15,0.82);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--glass-border);
  transition: background 0.3s ease, box-shadow 0.3s ease;
}
.site-header.scrolled {
  background: rgba(7,9,15,0.92);
  box-shadow: 0 4px 24px rgba(0,0,0,0.40);
}
.header-inner {
  height: 100%;
  display: flex; align-items: center; justify-content: space-between;
  gap: 24px;
}
.brand {
  display: flex; align-items: center; gap: 10px;
  flex-shrink: 0;
}
.brand-icon {
  width: 32px; height: 32px;
  color: var(--primary);
  flex-shrink: 0;
}
.brand-text {
  font-size: 20px; font-weight: 800;
  letter-spacing: -0.01em;
  white-space: nowrap;
}
.main-nav {
  display: flex; align-items: center; gap: 8px;
  flex: 1; justify-content: center;
}
.nav-link {
  padding: 8px 16px;
  border-radius: 999px;
  font-size: 15px;
  font-weight: 500;
  color: var(--text-secondary);
  transition: all 0.2s ease;
  white-space: nowrap;
}
.nav-link:hover { color: var(--text-main); background: rgba(255,255,255,0.05); }
.nav-link.active { color: var(--text-main); background: rgba(46,107,255,0.15); }
.header-actions {
  display: flex; align-items: center; gap: 16px;
  flex-shrink: 0;
}
.search-box {
  position: relative;
  width: 260px;
}
.search-box .search-icon {
  position: absolute; left: 12px; top: 50%;
  transform: translateY(-50%);
  color: var(--text-weak);
  font-size: 14px;
  pointer-events: none;
}
.search-box input {
  width: 100%;
  height: 36px;
  padding: 0 14px;
  padding-left: 36px;
  background: rgba(255,255,255,0.04);
  border: 1px solid rgba(255,255,255,0.08);
  border-radius: var(--radius-xs);
  color: var(--text-main);
  font-size: 14px;
  outline: none;
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}
.search-box input::placeholder { color: var(--text-weak); }
.search-box input:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(46,107,255,0.15);
}
.btn-login {
  font-size: 14px; font-weight: 500;
  color: var(--text-secondary);
  padding: 6px 10px;
  transition: color 0.2s ease;
}
.btn-login:hover { color: var(--text-main); }
.nav-toggle {
  display: none;
  background: transparent;
  border: 1px solid var(--glass-border-strong);
  border-radius: var(--radius-xs);
  width: 40px; height: 36px;
  color: var(--text-main);
  font-size: 16px;
  cursor: pointer;
  align-items: center; justify-content: center;
}

/* ========== Hero ========== */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex; align-items: center;
  background-image: url('/assets/images/backpic/back-1.png');
  background-size: cover;
  background-position: center;
  padding: 120px 0 80px;
  overflow: hidden;
}
.hero::before {
  content: ''; position: absolute; inset: 0;
  background: linear-gradient(180deg, rgba(7,9,15,0.55) 0%, rgba(7,9,15,0.80) 70%, var(--bg-page) 100%);
}
.hero::after {
  content: ''; position: absolute; top: -200px; left: 50%;
  transform: translateX(-50%);
  width: 600px; height: 600px;
  background: radial-gradient(circle, rgba(46,107,255,0.08) 0%, transparent 70%);
  pointer-events: none;
}
.hero-inner {
  position: relative; z-index: 2;
  display: flex; flex-direction: column; align-items: center;
  text-align: center;
}
.hero-panel {
  max-width: 720px;
  background: rgba(255,255,255,0.04);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-lg);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  padding: 56px 48px;
  box-shadow: var(--shadow-card);
}
.hero-badge {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 6px 16px;
  border-radius: 999px;
  border: 1px solid rgba(46,107,255,0.35);
  background: rgba(46,107,255,0.08);
  font-size: 13px; font-weight: 500;
  color: var(--text-secondary);
  margin-bottom: 24px;
}
.hero-badge::before {
  content: '';
  width: 6px; height: 6px;
  border-radius: 50%;
  background: var(--primary);
  box-shadow: 0 0 8px var(--primary);
}
.hero-panel h1 {
  font-size: 46px;
  font-weight: 800;
  line-height: 1.25;
  letter-spacing: -0.01em;
  color: var(--text-main);
  margin-bottom: 20px;
}
.hero-subtitle {
  font-size: 18px;
  color: var(--text-secondary);
  line-height: 1.6;
  margin-bottom: 36px;
}
.hero-actions {
  display: flex; gap: 16px; justify-content: center;
  flex-wrap: wrap;
}
.hero-stats {
  display: flex; gap: 48px; justify-content: center;
  margin-top: 48px;
  flex-wrap: wrap;
}
.stat-item {
  text-align: center;
}
.stat-num {
  display: block;
  font-size: 32px;
  font-weight: 800;
  color: var(--text-main);
  font-variant-numeric: tabular-nums;
}
.stat-label {
  font-size: 14px;
  color: var(--text-weak);
  margin-top: 4px;
}

/* ========== 板块通用 ========== */
.section { padding: 96px 0; }
.section-alt { background: var(--bg-level2); }
.section-header {
  display: flex; align-items: flex-end; justify-content: space-between;
  margin-bottom: 40px;
}
.section-header h2 {
  font-size: 32px;
  font-weight: 800;
  letter-spacing: -0.01em;
}
.section-header-center {
  text-align: center;
  margin-bottom: 48px;
}
.section-header-center h2 {
  font-size: 32px;
  font-weight: 800;
  letter-spacing: -0.01em;
}
.section-header-center .sub-title {
  font-size: 15px;
  color: var(--text-secondary);
  margin-top: 10px;
}
.link-more {
  font-size: 15px;
  color: var(--primary);
  display: inline-flex; align-items: center; gap: 6px;
  transition: gap 0.2s ease;
}
.link-more:hover { gap: 10px; }

/* ========== 优势速览 ========== */
.feature-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}
.feature-card {
  background: rgba(255,255,255,0.03);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-md);
  padding: 28px 24px;
  transition: all 0.25s ease;
}
.feature-card:hover {
  background: rgba(255,255,255,0.05);
  border-color: var(--glass-border-strong);
  box-shadow: var(--shadow-card-hover);
  transform: translateY(-4px);
}
.feature-icon {
  width: 48px; height: 48px;
  border-radius: 12px;
  background: rgba(46,107,255,0.12);
  display: flex; align-items: center; justify-content: center;
  color: var(--primary);
  font-size: 20px;
  margin-bottom: 18px;
}
.feature-card h3 {
  font-size: 16px;
  font-weight: 600;
  margin-bottom: 8px;
}
.feature-card p {
  font-size: 13px;
  color: var(--text-secondary);
  line-height: 1.5;
}

/* ========== 优惠阶梯 ========== */
.tier-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  align-items: stretch;
}
.tier-card {
  position: relative;
  background: rgba(255,255,255,0.03);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-md);
  padding: 36px 32px;
  display: flex; flex-direction: column;
  transition: all 0.25s ease;
}
.tier-card:hover {
  box-shadow: var(--shadow-card-hover);
  transform: translateY(-4px);
}
.tier-card.center {
  background: rgba(255,255,255,0.06);
  border-color: rgba(46,107,255,0.30);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  padding: 46px 36px;
  transform: scale(1.05);
  z-index: 1;
}
.tier-card.center:hover { transform: scale(1.05) translateY(-4px); }
.tier-card.center::before {
  content: '';
  position: absolute; top: 0; left: 20px; right: 20px;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--primary), transparent);
}
.tier-badge {
  position: absolute; top: -12px; left: 50%;
  transform: translateX(-50%);
  background: linear-gradient(135deg, var(--primary), var(--accent));
  color: #fff;
  font-size: 12px;
  font-weight: 600;
  padding: 4px 14px;
  border-radius: 999px;
  white-space: nowrap;
  box-shadow: 0 0 12px rgba(46,107,255,0.40);
}
.tier-level {
  font-size: 18px; font-weight: 700;
  margin-bottom: 12px;
}
.tier-price {
  font-size: 40px; font-weight: 800;
  color: var(--primary);
  font-variant-numeric: tabular-nums;
  line-height: 1.3;
  margin-bottom: 4px;
  text-shadow: 0 0 20px rgba(46,107,255,0.30);
}
.tier-price-note { font-size: 13px; color: var(--text-weak); margin-bottom: 24px; }
.tier-features {
  list-style: none;
  margin-bottom: 32px;
  flex-grow: 1;
}
.tier-features li {
  display: flex; align-items: flex-start; gap: 10px;
  font-size: 14px;
  color: var(--text-secondary);
  padding: 8px 0;
}
.tier-features li::before {
  content: '✓';
  color: var(--success);
  font-weight: 700;
  flex-shrink: 0;
  margin-top: 1px;
}
.tier-card .btn { width: 100%; }

/* ========== 套餐对比 ========== */
.compare-wrapper {
  overflow-x: auto;
  border-radius: var(--radius-sm);
  border: 1px solid var(--glass-border);
  background: rgba(255,255,255,0.02);
}
.compare-table {
  width: 100%;
  border-collapse: collapse;
  min-width: 768px;
}
.compare-table th,
.compare-table td {
  padding: 16px 20px;
  text-align: center;
  font-size: 15px;
  border-bottom: 1px solid rgba(255,255,255,0.06);
}
.compare-table thead th {
  background: rgba(255,255,255,0.06);
  font-weight: 600;
  color: var(--text-main);
}
.compare-table tbody tr:last-child td { border-bottom: none; }
.compare-table tbody tr:hover td { background: rgba(255,255,255,0.02); }
.compare-table .feature-name {
  text-align: left;
  font-weight: 600;
  font-size: 15px;
}
.compare-table .col-recommend {
  border-left: 1px solid rgba(46,107,255,0.40);
  border-right: 1px solid rgba(46,107,255,0.40);
  position: relative;
}
.compare-table .recommend-tag {
  display: inline-block;
  background: linear-gradient(135deg, var(--primary), var(--accent));
  color: #fff;
  font-size: 11px;
  font-weight: 600;
  padding: 2px 10px;
  border-radius: 999px;
  margin-bottom: 4px;
}
.compare-table .icon-check { color: var(--success); font-weight: 700; }
.compare-table .icon-missing { color: var(--text-weak); }
.compare-cta-cell {
  font-size: 14px;
  color: var(--primary);
  font-weight: 500;
  white-space: nowrap;
}
.compare-cta-cell a { color: var(--primary); }
.compare-cta-cell a:hover { text-decoration: underline; }

/* ========== 限时入口 ========== */
.timer-section {
  position: relative;
  background-image: url('/assets/images/coverpic/cover-2.webp');
  background-size: cover;
  background-position: center;
  padding: 100px 0;
  overflow: hidden;
}
.timer-section::before {
  content: '';
  position: absolute; inset: 0;
  background: rgba(7,9,15,0.82);
  backdrop-filter: blur(4px);
  -webkit-backdrop-filter: blur(4px);
}
.timer-inner {
  position: relative; z-index: 2;
  text-align: center;
}
.timer-panel {
  max-width: 680px;
  margin: 0 auto;
  background: rgba(255,255,255,0.04);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-lg);
  padding: 56px 48px;
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
}
.timer-panel h2 {
  font-size: 32px;
  font-weight: 800;
  margin-bottom: 36px;
}
.countdown {
  display: flex; justify-content: center; gap: 12px;
  margin-bottom: 36px;
}
.countdown-item {
  width: 64px; height: 80px;
  background: rgba(255,255,255,0.04);
  border: 1px solid var(--glass-border);
  border-radius: 12px;
  display: flex; flex-direction: column; align-items: center; justify-content: center;
}
.countdown-item .num {
  font-size: 32px;
  font-weight: 800;
  font-variant-numeric: tabular-nums;
  color: #fff;
  text-shadow: 0 0 12px rgba(244,63,94,0.50);
  line-height: 1;
}
.countdown-item .label {
  font-size: 12px;
  color: var(--text-weak);
  margin-top: 6px;
}
.timer-tip {
  font-size: 16px;
  color: var(--text-secondary);
  margin-bottom: 28px;
}

/* ========== 最新资讯（CMS） ========== */
.news-section { background: var(--bg-page); }
.news-layout {
  display: grid;
  grid-template-columns: 7fr 5fr;
  gap: 32px;
  align-items: start;
}
.news-featured-card {
  background: rgba(255,255,255,0.03);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-md);
  overflow: hidden;
  display: block;
  transition: all 0.25s ease;
}
.news-featured-card:hover {
  box-shadow: var(--shadow-card-hover);
  transform: translateY(-4px);
}
.news-featured-card .news-img {
  aspect-ratio: 16/9;
  overflow: hidden;
  background: rgba(255,255,255,0.04);
}
.news-featured-card img {
  width: 100%; height: 100%;
  object-fit: cover;
  transition: transform 0.4s ease;
}
.news-featured-card:hover img { transform: scale(1.03); }
.news-featured-body { padding: 24px; }
.news-featured-body h3 {
  font-size: 20px;
  font-weight: 700;
  line-height: 1.4;
  margin-bottom: 12px;
}
.news-featured-body p {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.7;
  margin-bottom: 16px;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.news-meta {
  display: flex; align-items: center; gap: 12px;
  flex-wrap: wrap;
}
.tag-tim {
  font-size: 12px;
  padding: 2px 10px;
  border-radius: 999px;
  background: rgba(46,107,255,0.12);
  color: var(--primary);
}
.time-tim {
  font-size: 12px;
  color: var(--text-weak);
  font-variant-numeric: tabular-nums;
}
.news-list {
  display: flex; flex-direction: column; gap: 16px;
}
.news-list-item {
  display: flex; gap: 16px;
  background: rgba(255,255,255,0.03);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-sm);
  padding: 12px;
  transition: all 0.25s ease;
}
.news-list-item:hover {
  background: rgba(255,255,255,0.06);
  border-color: rgba(46,107,255,0.30);
  transform: translateY(-2px);
}
.news-list-item .thumb {
  width: 72px; height: 72px;
  border-radius: 8px;
  overflow: hidden;
  flex-shrink: 0;
  background: rgba(255,255,255,0.04);
}
.news-list-item .thumb img {
  width: 100%; height: 100%;
  object-fit: cover;
}
.news-list-body { flex: 1; min-width: 0; }
.news-list-body h4 {
  font-size: 16px;
  font-weight: 600;
  line-height: 1.4;
  margin-bottom: 4px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.news-list-body p {
  font-size: 12px;
  color: var(--text-secondary);
  line-height: 1.5;
  margin-bottom: 6px;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.news-empty {
  grid-column: 1 / -1;
  text-align: center;
  padding: 60px 20px;
  background: rgba(255,255,255,0.02);
  border: 1px dashed var(--glass-border-strong);
  border-radius: var(--radius-md);
}
.news-empty .empty-icon {
  font-size: 64px;
  color: var(--text-weak);
  opacity: 0.4;
  margin-bottom: 16px;
  line-height: 1;
}
.news-empty p { font-size: 14px; color: var(--text-weak); }

/* ========== FAQ ========== */
.faq-section { background: var(--bg-level2); }
.faq-accordion {
  max-width: 860px;
  margin: 0 auto;
  background: rgba(255,255,255,0.03);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-md);
  padding: 8px 24px;
}
.accordion-item {
  border-bottom: 1px solid rgba(255,255,255,0.06);
}
.accordion-item:last-child { border-bottom: none; }
.accordion-title {
  display: flex; align-items: center; justify-content: space-between;
  padding: 18px 0;
  font-size: 16px; font-weight: 600;
  cursor: pointer;
  transition: color 0.2s ease;
}
.accordion-title:hover { color: var(--primary); }
.accordion-title .acc-icon {
  width: 22px; height: 22px;
  border-radius: 50%;
  background: rgba(46,107,255,0.12);
  color: var(--primary);
  display: flex; align-items: center; justify-content: center;
  font-size: 14px;
  flex-shrink: 0;
  transition: transform 0.3s ease;
}
.accordion-item.open .acc-icon { transform: rotate(45deg); }
.accordion-content {
  display: none;
  padding: 0 0 18px;
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.8;
}
.accordion-item.open .accordion-content { display: block; animation: fadeIn 0.3s ease; }
@keyframes fadeIn {
  from { opacity: 0; transform: translateY(-4px); }
  to { opacity: 1; transform: translateY(0); }
}

/* ========== 咨询表单 ========== */
.contact-section { background: var(--bg-page); }
.contact-layout {
  display: grid;
  grid-template-columns: 5fr 7fr;
  gap: 48px;
  align-items: start;
}
.contact-info h2 {
  font-size: 32px;
  font-weight: 800;
  margin-bottom: 16px;
}
.contact-info .contact-desc {
  font-size: 15px;
  color: var(--text-secondary);
  margin-bottom: 32px;
  max-width: 360px;
}
.contact-meta {
  display: flex; flex-direction: column; gap: 16px;
}
.contact-meta-item {
  display: flex; align-items: center; gap: 14px;
  font-size: 14px;
  color: var(--text-secondary);
}
.contact-meta-item i {
  width: 38px; height: 38px;
  border-radius: 10px;
  background: rgba(46,107,255,0.10);
  color: var(--primary);
  display: flex; align-items: center; justify-content: center;
  font-size: 15px;
  flex-shrink: 0;
}
.contact-form {
  background: rgba(255,255,255,0.03);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-md);
  padding: 36px;
}
.form-group {
  margin-bottom: 20px;
}
.form-group label {
  display: block;
  font-size: 14px; font-weight: 500;
  color: var(--text-secondary);
  margin-bottom: 8px;
}
.form-group label .required { color: var(--primary); }
.form-group input,
.form-group textarea,
.form-group select {
  width: 100%;
  padding: 12px 16px;
  background: rgba(255,255,255,0.04);
  border: 1px solid rgba(255,255,255,0.10);
  border-radius: var(--radius-xs);
  color: var(--text-main);
  font-size: 14px;
  outline: none;
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}
.form-group textarea { min-height: 110px; resize: vertical; }
.form-group select {
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8' viewBox='0 0 12 8'%3E%3Cpath fill='%2398A2B3' d='M6 8L0 0h12z'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 16px center;
}
.form-group input::placeholder,
.form-group textarea::placeholder { color: var(--text-weak); }
.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(46,107,255,0.15);
}
.form-group select option { background: var(--bg-level3); }

/* ========== 页脚 ========== */
.site-footer {
  background: #04060A;
  border-top: 1px solid var(--glass-border);
  padding: 64px 0 24px;
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.2fr 1fr 1fr 1.2fr;
  gap: 40px;
  margin-bottom: 48px;
}
.footer-col h4 {
  font-size: 16px;
  font-weight: 600;
  margin-bottom: 18px;
}
.footer-col p {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.7;
}
.footer-col ul li {
  margin-bottom: 10px;
}
.footer-col ul li a {
  font-size: 14px;
  color: var(--text-secondary);
  transition: color 0.2s ease;
}
.footer-col ul li a:hover { color: var(--primary); }
.footer-col .footer-contact li {
  display: flex; align-items: center; gap: 10px;
  font-size: 14px;
  color: var(--text-secondary);
}
.footer-col .footer-contact li i {
  width: 16px;
  color: var(--primary);
  flex-shrink: 0;
}
.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.06);
  padding-top: 24px;
  display: flex; align-items: center; justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
}
.footer-bottom p {
  font-size: 13px;
  color: var(--text-weak);
}
.back-top {
  display: inline-flex; align-items: center; gap: 8px;
  font-size: 13px;
  color: var(--text-secondary);
  padding: 6px 14px;
  border: 1px solid var(--glass-border);
  border-radius: 999px;
  transition: all 0.2s ease;
  background: transparent;
  cursor: pointer;
}
.back-top:hover {
  border-color: var(--primary);
  color: var(--primary);
}

/* ========== 响应式 ========== */
@media (max-width: 1023px) {
  .feature-grid { grid-template-columns: repeat(2, 1fr); }
  .tier-grid { gap: 16px; }
  .tier-card.center { transform: scale(1.03); }
  .tier-card.center:hover { transform: scale(1.03) translateY(-4px); }
  .contact-layout { grid-template-columns: 1fr; gap: 32px; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .news-layout { grid-template-columns: 1fr; }
}

@media (max-width: 767px) {
  .site-header { height: 60px; }
  .header-inner { gap: 12px; padding: 0 12px; }
  .main-nav {
    position: fixed;
    top: 60px; left: 0; right: 0;
    background: rgba(7,9,15,0.98);
    flex-direction: column;
    align-items: stretch;
    padding: 16px 20px;
    gap: 4px;
    border-bottom: 1px solid var(--glass-border);
    display: none;
    z-index: 999;
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
  }
  .main-nav.open { display: flex; }
  .nav-link { padding: 12px 16px; }
  .search-box { width: 40px; }
  .search-box .search-icon { left: 12px; }
  .search-box input {
    padding-left: 36px;
    width: 40px;
    cursor: pointer;
  }
  .search-box input:focus { width: 160px; }
  .btn-login { display: none; }
  .btn-nav { padding: 8px 14px; font-size: 13px; }
  .nav-toggle { display: flex; }
  .hero { padding: 100px 0 60px; min-height: 90vh; }
  .hero-panel { padding: 32px 24px; }
  .hero-panel h1 { font-size: 30px; }
  .hero-subtitle { font-size: 16px; margin-bottom: 28px; }
  .hero-actions { flex-direction: column; gap: 12px; }
  .hero-stats { gap: 24px; margin-top: 32px; }
  .stat-num { font-size: 24px; }
  .section { padding: var(--space-section-mobile) 0; }
  .section-header { flex-direction: column; align-items: flex-start; gap: 12px; margin-bottom: 28px; }
  .section-header h2 { font-size: 26px; }
  .section-header-center h2 { font-size: 26px; }
  .feature-grid { grid-template-columns: 1fr 1fr; gap: 12px; }
  .feature-card { padding: 20px 16px; }
  .tier-grid { grid-template-columns: 1fr; }
  .tier-card.center { transform: none; padding: 36px 32px; }
  .tier-card.center:hover { transform: translateY(-4px); }
  .timer-panel { padding: 36px 24px; }
  .timer-panel h2 { font-size: 26px; }
  .countdown { gap: 8px; }
  .countdown-item { width: 52px; height: 68px; }
  .countdown-item .num { font-size: 26px; }
  .news-layout { grid-template-columns: 1fr; }
  .contact-form { padding: 24px; }
  .footer-grid { grid-template-columns: 1fr; gap: 32px; }
  .footer-bottom { flex-direction: column; text-align: center; }
  .faq-accordion { padding: 8px 16px; }
  .compare-table { min-width: 640px; }
}

@media (max-width: 519px) {
  .feature-grid { grid-template-columns: 1fr; }
  .brand-text { font-size: 18px; }
  .hero-panel h1 { font-size: 28px; }
  .container { padding: 0 16px; }
}

/* roulang page: category1 */
/* ===== 设计变量 ===== */
    :root {
      --bg-page: #07090F;
      --bg-level2: #0D1225;
      --bg-level3: #111731;
      --primary: #2E6BFF;
      --secondary: #22D3EE;
      --accent: #7C3AED;
      --text-main: #E6EAF2;
      --text-secondary: #98A2B3;
      --text-weak: #667085;
      --success: #10B981;
      --warning: #F43F5E;
      --glass-bg: rgba(255,255,255,0.04);
      --glass-bg-hover: rgba(255,255,255,0.06);
      --glass-border: rgba(255,255,255,0.08);
      --glass-border-strong: rgba(255,255,255,0.12);
      --radius-xl: 24px;
      --radius-lg: 16px;
      --radius-sm: 12px;
      --radius-btn: 8px;
      --shadow-card: 0 8px 32px rgba(0,0,0,0.35);
      --shadow-card-hover: 0 16px 48px rgba(0,0,0,0.50), 0 0 0 1px rgba(46,107,255,0.25);
      --shadow-btn: 0 0 20px rgba(46,107,255,0.40);
      --shadow-btn-hover: 0 0 32px rgba(46,107,255,0.60);
      --space-section: 96px;
      --font-family: -apple-system, "PingFang SC", "Microsoft YaHei", "Noto Sans CJK SC", sans-serif;
    }

    /* ===== Reset & 基础 ===== */
    *, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
    html { scroll-behavior: smooth; }
    body {
      font-family: var(--font-family);
      background: var(--bg-page);
      color: var(--text-main);
      line-height: 1.6;
      font-size: 16px;
      -webkit-font-smoothing: antialiased;
      font-variant-numeric: tabular-nums;
      overflow-x: hidden;
    }
    a { color: var(--text-main); text-decoration: none; transition: color 0.3s ease, border-color 0.3s ease; }
    a:hover { color: var(--secondary); }
    img { max-width: 100%; display: block; height: auto; }
    button { font-family: inherit; cursor: pointer; background: none; border: none; }
    input, select, textarea { font-family: inherit; font-size: inherit; color: var(--text-main); }
    ul, ol { list-style: none; }
    h1, h2, h3, h4, h5, h6 { font-weight: 700; line-height: 1.3; letter-spacing: -0.01em; }

    /* ===== 容器 ===== */
    .container {
      max-width: 1200px;
      margin: 0 auto;
      padding: 0 20px;
    }

    /* ===== Header / 导航 ===== */
    .site-header {
      position: fixed;
      top: 0;
      left: 0;
      right: 0;
      z-index: 1000;
      height: 72px;
      background: rgba(7,9,15,0.82);
      backdrop-filter: blur(16px);
      -webkit-backdrop-filter: blur(16px);
      border-bottom: 1px solid var(--glass-border);
      transition: background 0.3s ease, box-shadow 0.3s ease;
    }
    .site-header.scrolled {
      background: rgba(7,9,15,0.92);
      box-shadow: 0 4px 30px rgba(0,0,0,0.3);
    }
    .header-inner {
      display: flex;
      align-items: center;
      justify-content: space-between;
      height: 100%;
      gap: 20px;
    }
    .brand {
      display: flex;
      align-items: center;
      gap: 10px;
      flex-shrink: 0;
    }
    .brand-icon {
      width: 32px;
      height: 32px;
      color: var(--primary);
      transition: color 0.3s;
    }
    .brand:hover .brand-icon {
      color: var(--secondary);
    }
    .brand-text {
      font-size: 20px;
      font-weight: 800;
      letter-spacing: -0.02em;
      background: linear-gradient(135deg, var(--text-main) 0%, #ffffff 100%);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      background-clip: text;
    }
    .main-nav {
      display: flex;
      align-items: center;
      gap: 4px;
      margin-left: 16px;
    }
    .nav-link {
      display: inline-flex;
      align-items: center;
      padding: 8px 16px;
      border-radius: 999px;
      font-size: 15px;
      font-weight: 500;
      color: var(--text-secondary);
      border: 1px solid transparent;
      transition: all 0.3s ease;
      white-space: nowrap;
    }
    .nav-link:hover {
      color: var(--text-main);
      background: var(--glass-bg);
      border-color: var(--glass-border);
    }
    .nav-link.active {
      color: var(--text-main);
      background: linear-gradient(135deg, rgba(46,107,255,0.2), rgba(34,211,238,0.15));
      border-color: rgba(46,107,255,0.4);
      box-shadow: 0 0 16px rgba(46,107,255,0.15);
    }
    .header-actions {
      display: flex;
      align-items: center;
      gap: 14px;
      flex-shrink: 0;
    }
    .search-box {
      position: relative;
      width: 260px;
    }
    .search-icon {
      position: absolute;
      left: 12px;
      top: 50%;
      transform: translateY(-50%);
      font-size: 13px;
      color: var(--text-weak);
      pointer-events: none;
      z-index: 1;
    }
    .search-box input {
      width: 100%;
      height: 38px;
      background: rgba(255,255,255,0.04);
      border: 1px solid var(--glass-border);
      border-radius: var(--radius-btn);
      padding: 8px 14px 8px 34px;
      font-size: 14px;
      color: var(--text-main);
      outline: none;
      transition: all 0.3s ease;
    }
    .search-box input::placeholder {
      color: var(--text-weak);
    }
    .search-box input:focus {
      border-color: var(--primary);
      box-shadow: 0 0 0 3px rgba(46,107,255,0.15), 0 0 20px rgba(46,107,255,0.15);
      background: rgba(255,255,255,0.06);
    }
    .btn-login {
      font-size: 14px;
      font-weight: 500;
      color: var(--text-secondary);
      padding: 8px 12px;
      border-radius: var(--radius-btn);
      transition: all 0.3s ease;
      border: 1px solid transparent;
    }
    .btn-login:hover {
      color: var(--text-main);
      background: var(--glass-bg);
      border-color: var(--glass-border);
    }
    .nav-toggle {
      display: none;
      width: 40px;
      height: 40px;
      border-radius: var(--radius-btn);
      align-items: center;
      justify-content: center;
      color: var(--text-main);
      font-size: 18px;
      background: var(--glass-bg);
      border: 1px solid var(--glass-border);
    }

    /* ===== 按钮 ===== */
    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 8px;
      padding: 12px 24px;
      border-radius: var(--radius-btn);
      font-size: 15px;
      font-weight: 600;
      line-height: 1.2;
      border: 1px solid transparent;
      transition: all 0.3s ease;
      text-align: center;
      white-space: nowrap;
    }
    .btn-primary {
      background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
      color: #ffffff;
      box-shadow: var(--shadow-btn);
    }
    .btn-primary:hover {
      color: #ffffff;
      transform: translateY(-2px);
      box-shadow: var(--shadow-btn-hover);
      filter: brightness(1.05);
    }
    .btn-primary:active {
      transform: translateY(-1px) scale(0.98);
      box-shadow: 0 0 10px rgba(46,107,255,0.3);
    }
    .btn-primary:focus-visible {
      outline: 2px solid var(--primary);
      outline-offset: 2px;
    }
    .btn-outline {
      background: transparent;
      border-color: rgba(255,255,255,0.14);
      color: var(--text-main);
    }
    .btn-outline:hover {
      background: var(--glass-bg-hover);
      border-color: var(--primary);
      color: var(--text-main);
      transform: translateY(-2px);
    }
    .btn-outline:focus-visible {
      outline: 2px solid var(--primary);
      outline-offset: 2px;
    }
    .btn-nav {
      padding: 9px 20px;
      font-size: 14px;
    }

    /* ===== 徽章 / 标签 ===== */
    .badge {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      padding: 6px 16px;
      border-radius: 999px;
      font-size: 13px;
      font-weight: 500;
      background: linear-gradient(135deg, rgba(46,107,255,0.15), rgba(124,58,237,0.12));
      border: 1px solid rgba(46,107,255,0.35);
      color: var(--text-main);
      box-shadow: 0 0 20px rgba(46,107,255,0.08);
    }
    .badge-dot {
      width: 6px;
      height: 6px;
      border-radius: 50%;
      background: var(--secondary);
      box-shadow: 0 0 8px var(--secondary);
    }
    .tag {
      display: inline-block;
      padding: 4px 12px;
      border-radius: 999px;
      font-size: 12px;
      font-weight: 500;
      color: var(--text-secondary);
      background: rgba(255,255,255,0.04);
      border: 1px solid var(--glass-border);
      transition: all 0.3s ease;
    }
    .tag:hover {
      color: var(--text-main);
      border-color: var(--primary);
      background: rgba(46,107,255,0.1);
    }

    /* ===== Hero ===== */
    .hero {
      position: relative;
      min-height: 100vh;
      display: flex;
      align-items: center;
      justify-content: center;
      padding: 140px 20px 80px;
      background: url('/assets/images/backpic/back-1.png') no-repeat center center / cover;
    }
    .hero::before {
      content: '';
      position: absolute;
      inset: 0;
      background: linear-gradient(to bottom, rgba(7,9,15,0.4) 0%, rgba(7,9,15,0.75) 60%, var(--bg-page) 100%);
      z-index: 0;
    }
    .hero-panel {
      position: relative;
      z-index: 1;
      max-width: 760px;
      width: 100%;
      text-align: center;
      background: rgba(255,255,255,0.04);
      backdrop-filter: blur(20px);
      -webkit-backdrop-filter: blur(20px);
      border: 1px solid var(--glass-border);
      border-radius: var(--radius-xl);
      padding: 48px 48px 42px;
      box-shadow: var(--shadow-card), inset 0 1px 0 rgba(255,255,255,0.06);
      overflow: hidden;
    }
    .hero-panel::before {
      content: '';
      position: absolute;
      top: -80px;
      left: -60px;
      width: 300px;
      height: 300px;
      background: radial-gradient(circle, rgba(46,107,255,0.08) 0%, transparent 70%);
      pointer-events: none;
      z-index: 0;
    }
    .hero-panel > * {
      position: relative;
      z-index: 1;
    }
    .hero-badge {
      margin-bottom: 24px;
    }
    .hero h1 {
      font-size: 46px;
      font-weight: 800;
      line-height: 1.25;
      margin: 0 0 20px;
      background: linear-gradient(135deg, #ffffff 0%, var(--secondary) 100%);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      background-clip: text;
    }
    .hero-subtitle {
      font-size: 18px;
      line-height: 1.7;
      color: var(--text-secondary);
      max-width: 560px;
      margin: 0 auto 36px;
    }
    .hero-ctas {
      display: flex;
      gap: 16px;
      justify-content: center;
      flex-wrap: wrap;
    }
    .hero-stat-row {
      display: flex;
      justify-content: center;
      gap: 48px;
      margin-top: 48px;
      padding-top: 28px;
      border-top: 1px solid var(--glass-border);
    }
    .hero-stat {
      text-align: center;
    }
    .hero-stat .num {
      font-size: 26px;
      font-weight: 800;
      color: var(--text-main);
      letter-spacing: -0.02em;
    }
    .hero-stat .label {
      display: block;
      margin-top: 4px;
      font-size: 13px;
      color: var(--text-weak);
      font-weight: 500;
    }

    /* ===== 区块通用 ===== */
    .section {
      padding: var(--space-section) 0;
    }
    .section-head {
      text-align: center;
      margin-bottom: 48px;
    }
    .section-head h2 {
      font-size: 32px;
      font-weight: 800;
      margin-bottom: 12px;
      color: var(--text-main);
    }
    .section-head p {
      font-size: 16px;
      color: var(--text-secondary);
      max-width: 560px;
      margin: 0 auto;
    }
    .section-head .section-tag {
      display: inline-block;
      font-size: 13px;
      font-weight: 600;
      color: var(--primary);
      text-transform: uppercase;
      letter-spacing: 0.05em;
      margin-bottom: 12px;
    }

    /* ===== 优势速览 ===== */
    .features-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 24px;
    }
    .feature-card {
      background: var(--glass-bg);
      border: 1px solid var(--glass-border);
      border-radius: var(--radius-lg);
      padding: 28px 24px;
      transition: all 0.4s ease;
      box-shadow: var(--shadow-card);
    }
    .feature-card:hover {
      background: var(--glass-bg-hover);
      border-color: rgba(46,107,255,0.3);
      transform: translateY(-4px);
      box-shadow: var(--shadow-card-hover);
    }
    .feature-icon {
      width: 48px;
      height: 48px;
      border-radius: var(--radius-sm);
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 20px;
      color: var(--primary);
      background: linear-gradient(135deg, rgba(46,107,255,0.15), rgba(34,211,238,0.08));
      border: 1px solid rgba(46,107,255,0.25);
      margin-bottom: 18px;
      transition: all 0.3s ease;
    }
    .feature-card:hover .feature-icon {
      color: var(--secondary);
      box-shadow: 0 0 20px rgba(46,107,255,0.2);
    }
    .feature-card h3 {
      font-size: 16px;
      font-weight: 600;
      margin-bottom: 8px;
      color: var(--text-main);
    }
    .feature-card p {
      font-size: 13px;
      color: var(--text-secondary);
      line-height: 1.6;
    }

    /* ===== 场景卡片 ===== */
    .scenarios-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 28px;
    }
    .scenario-card {
      background: rgba(255,255,255,0.03);
      border: 1px solid var(--glass-border);
      border-radius: var(--radius-lg);
      overflow: hidden;
      transition: all 0.4s ease;
      box-shadow: var(--shadow-card);
      display: flex;
      flex-direction: column;
    }
    .scenario-card:hover {
      background: var(--glass-bg-hover);
      border-color: rgba(46,107,255,0.3);
      transform: translateY(-4px);
      box-shadow: var(--shadow-card-hover);
    }
    .scenario-card .card-img {
      position: relative;
      aspect-ratio: 16 / 9;
      overflow: hidden;
    }
    .scenario-card .card-img img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      transition: transform 0.5s ease;
    }
    .scenario-card:hover .card-img img {
      transform: scale(1.04);
    }
    .scenario-card .card-img::after {
      content: '';
      position: absolute;
      inset: 0;
      background: linear-gradient(to top, rgba(7,9,15,0.2) 0%, transparent 50%);
      pointer-events: none;
    }
    .card-body {
      padding: 22px 22px 20px;
      flex: 1;
      display: flex;
      flex-direction: column;
    }
    .card-body h3 {
      font-size: 18px;
      font-weight: 700;
      margin-bottom: 10px;
      color: var(--text-main);
    }
    .card-body p {
      font-size: 14px;
      color: var(--text-secondary);
      line-height: 1.7;
      margin-bottom: 16px;
      flex: 1;
      display: -webkit-box;
      -webkit-line-clamp: 2;
      -webkit-box-orient: vertical;
      overflow: hidden;
    }
    .card-tags {
      display: flex;
      gap: 8px;
      margin-bottom: 14px;
      flex-wrap: wrap;
    }
    .card-link {
      font-size: 14px;
      font-weight: 600;
      color: var(--primary);
      display: inline-flex;
      align-items: center;
      gap: 6px;
      transition: gap 0.3s ease, color 0.3s ease;
    }
    .card-link:hover {
      color: var(--secondary);
      gap: 10px;
    }
    .card-link i {
      font-size: 12px;
    }

    /* ===== 流程步骤 ===== */
    .steps-section {
      background: var(--bg-level2);
      border-top: 1px solid var(--glass-border);
      border-bottom: 1px solid var(--glass-border);
    }
    .steps-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 28px;
    }
    .step-item {
      text-align: center;
      padding: 24px 18px;
    }
    .step-num {
      width: 56px;
      height: 56px;
      margin: 0 auto 18px;
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 20px;
      font-weight: 800;
      color: var(--text-main);
      background: linear-gradient(135deg, var(--primary), var(--secondary));
      box-shadow: var(--shadow-btn);
      position: relative;
    }
    .step-num::after {
      content: '';
      position: absolute;
      inset: -4px;
      border-radius: 50%;
      border: 1px solid rgba(46,107,255,0.25);
      animation: pulse-ring 2.5s ease infinite;
    }
    @keyframes pulse-ring {
      0%, 100% { transform: scale(1); opacity: 1; }
      50% { transform: scale(1.08); opacity: 0.6; }
    }
    .step-item h3 {
      font-size: 16px;
      font-weight: 600;
      margin-bottom: 8px;
      color: var(--text-main);
    }
    .step-item p {
      font-size: 13px;
      color: var(--text-secondary);
      line-height: 1.6;
      max-width: 220px;
      margin: 0 auto;
    }

    /* ===== FAQ ===== */
    .faq-section {
      background: var(--bg-page);
    }
    .faq-wrap {
      max-width: 800px;
      margin: 0 auto;
      background: var(--glass-bg);
      border: 1px solid var(--glass-border);
      border-radius: var(--radius-lg);
      padding: 24px;
      box-shadow: var(--shadow-card);
    }
    .accordion {
      background: transparent;
      border: none;
      border-radius: 0;
    }
    .accordion-item {
      background: transparent;
      border: 1px solid var(--glass-border);
      border-radius: var(--radius-sm);
      margin-bottom: 12px;
      overflow: hidden;
      transition: border-color 0.3s ease;
    }
    .accordion-item:last-child {
      margin-bottom: 0;
    }
    .accordion-item.is-active {
      border-color: rgba(46,107,255,0.3);
    }
    .accordion-title {
      background: rgba(255,255,255,0.02);
      border: none;
      border-radius: 0;
      padding: 20px 24px;
      font-size: 16px;
      font-weight: 600;
      color: var(--text-main);
      display: flex;
      justify-content: space-between;
      align-items: center;
      position: relative;
      transition: background 0.3s, color 0.3s;
      font-family: var(--font-family);
      line-height: 1.4;
    }
    .accordion-title:hover,
    .accordion-title:focus {
      background: rgba(255,255,255,0.05);
      color: var(--text-main);
    }
    .accordion-title::before {
      content: none;
    }
    .accordion-title::after {
      content: '+';
      font-size: 22px;
      font-weight: 400;
      color: var(--primary);
      position: static;
      margin-left: 12px;
      transform: none;
      transition: transform 0.3s ease, color 0.3s ease;
    }
    .accordion-item.is-active > .accordion-title::after {
      content: '×';
      transform: rotate(45deg);
      color: var(--secondary);
    }
    .accordion-content {
      background: rgba(255,255,255,0.02);
      border: none;
      border-radius: 0;
      padding: 0 24px 20px;
      font-size: 14px;
      color: var(--text-secondary);
      line-height: 1.8;
    }
    .accordion-content p {
      padding: 0;
      margin: 0;
    }

    /* ===== CTA 面板 ===== */
    .cta-section {
      padding: 40px 0 96px;
    }
    .cta-panel {
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 32px;
      background: linear-gradient(135deg, rgba(46,107,255,0.1), rgba(124,58,237,0.06));
      border: 1px solid rgba(46,107,255,0.25);
      border-radius: var(--radius-xl);
      padding: 44px 48px;
      box-shadow: var(--shadow-card);
      backdrop-filter: blur(12px);
      -webkit-backdrop-filter: blur(12px);
      position: relative;
      overflow: hidden;
    }
    .cta-panel::before {
      content: '';
      position: absolute;
      top: -100px;
      right: -80px;
      width: 300px;
      height: 300px;
      background: radial-gradient(circle, rgba(124,58,237,0.1) 0%, transparent 70%);
      pointer-events: none;
    }
    .cta-text h2 {
      font-size: 24px;
      font-weight: 700;
      margin-bottom: 8px;
      color: var(--text-main);
    }
    .cta-text p {
      font-size: 15px;
      color: var(--text-secondary);
    }
    .cta-actions {
      flex-shrink: 0;
    }

    /* ===== Footer ===== */
    .site-footer {
      background: #05070C;
      border-top: 1px solid var(--glass-border);
      padding: 60px 0 0;
    }
    .footer-grid {
      display: grid;
      grid-template-columns: 1.4fr 1fr 1fr 1.2fr;
      gap: 40px;
      margin-bottom: 48px;
    }
    .footer-col h4 {
      font-size: 15px;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 18px;
      position: relative;
      padding-bottom: 10px;
    }
    .footer-col h4::after {
      content: '';
      position: absolute;
      left: 0;
      bottom: 0;
      width: 28px;
      height: 2px;
      background: linear-gradient(90deg, var(--primary), var(--secondary));
      border-radius: 2px;
    }
    .footer-col p {
      font-size: 14px;
      color: var(--text-secondary);
      line-height: 1.7;
    }
    .footer-col ul {
      margin: 0;
    }
    .footer-col ul li {
      margin-bottom: 10px;
    }
    .footer-col ul a {
      font-size: 14px;
      color: var(--text-secondary);
      transition: color 0.3s ease, padding-left 0.3s ease;
    }
    .footer-col ul a:hover {
      color: var(--secondary);
      padding-left: 4px;
    }
    .footer-contact li {
      font-size: 14px;
      color: var(--text-secondary);
      display: flex;
      align-items: center;
      gap: 10px;
    }
    .footer-contact i {
      color: var(--primary);
      width: 16px;
      text-align: center;
      font-size: 13px;
    }
    .footer-bottom {
      border-top: 1px solid var(--glass-border);
      padding: 20px 0;
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 16px;
      flex-wrap: wrap;
    }
    .footer-bottom p {
      font-size: 13px;
      color: var(--text-weak);
    }
    .back-top {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      font-size: 13px;
      color: var(--text-secondary);
      background: var(--glass-bg);
      border: 1px solid var(--glass-border);
      padding: 8px 16px;
      border-radius: 999px;
      transition: all 0.3s ease;
    }
    .back-top:hover {
      color: var(--text-main);
      border-color: var(--primary);
      background: rgba(46,107,255,0.1);
    }

    /* ===== 响应式 ===== */
    @media screen and (max-width: 1023px) {
      .features-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .scenarios-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .steps-grid {
        grid-template-columns: repeat(2, 1fr);
        row-gap: 36px;
      }
      .main-nav {
        display: none;
      }
      .nav-toggle {
        display: flex;
      }
      .search-box {
        width: 180px;
      }
      .hero h1 {
        font-size: 36px;
      }
      .footer-grid {
        grid-template-columns: 1fr 1fr;
      }
    }

    @media screen and (max-width: 767px) {
      :root {
        --space-section: 56px;
      }
      .section {
        padding: var(--space-section) 0;
      }
      .container {
        padding: 0 16px;
      }
      .site-header {
        height: 60px;
      }
      .brand-text {
        font-size: 17px;
      }
      .search-box {
        display: none;
      }
      .btn-login {
        display: none;
      }
      .hero {
        padding: 100px 16px 60px;
        min-height: 80vh;
      }
      .hero-panel {
        padding: 32px 24px 28px;
        border-radius: 20px;
      }
      .hero h1 {
        font-size: 28px;
        line-height: 1.3;
      }
      .hero-subtitle {
        font-size: 16px;
        line-height: 1.6;
        margin-bottom: 28px;
      }
      .hero-ctas {
        flex-direction: column;
        gap: 12px;
      }
      .hero-ctas .btn {
        width: 100%;
      }
      .hero-stat-row {
        gap: 20px;
        margin-top: 32px;
        flex-wrap: wrap;
      }
      .hero-stat .num {
        font-size: 22px;
      }
      .features-grid {
        grid-template-columns: 1fr;
        gap: 16px;
      }
      .scenarios-grid {
        grid-template-columns: 1fr;
        gap: 18px;
      }
      .steps-grid {
        grid-template-columns: 1fr;
        gap: 24px;
      }
      .section-head h2 {
        font-size: 26px;
      }
      .section-head p {
        font-size: 14px;
      }
      .faq-wrap {
        padding: 16px;
      }
      .accordion-title {
        font-size: 15px;
        padding: 18px 18px;
      }
      .accordion-content {
        padding: 0 18px 16px;
        font-size: 14px;
      }
      .cta-section {
        padding: 20px 0 56px;
      }
      .cta-panel {
        flex-direction: column;
        padding: 32px 24px;
        text-align: center;
      }
      .cta-actions .btn {
        width: 100%;
      }
      .footer-grid {
        grid-template-columns: 1fr;
        gap: 32px;
      }
      .footer-bottom {
        flex-direction: column;
        text-align: center;
      }
    }

    @media screen and (max-width: 520px) {
      .brand-icon {
        width: 26px;
        height: 26px;
      }
      .hero-panel {
        padding: 28px 18px 24px;
      }
      .hero-stat-row {
        gap: 12px;
      }
      .footer-contact li {
        font-size: 13px;
      }
    }

/* roulang page: article */
:root{
  --bg-primary:#07090F;
  --bg-secondary:#0D1225;
  --bg-tertiary:#111731;
  --primary:#2E6BFF;
  --secondary:#22D3EE;
  --accent:#7C3AED;
  --text-primary:#E6EAF2;
  --text-secondary:#98A2B3;
  --text-muted:#667085;
  --success:#10B981;
  --danger:#F43F5E;
  --glass-bg:rgba(255,255,255,0.04);
  --glass-border:rgba(255,255,255,0.08);
  --glass-border-strong:rgba(255,255,255,0.12);
  --radius-lg:24px;
  --radius-md:16px;
  --radius-sm:12px;
  --radius-xs:8px;
  --shadow-card:0 8px 32px rgba(0,0,0,0.35);
  --shadow-hover:0 16px 48px rgba(0,0,0,0.50),0 0 0 1px rgba(46,107,255,0.25);
  --shadow-glow:0 0 20px rgba(46,107,255,0.40);
  --shadow-glow-hover:0 0 32px rgba(46,107,255,0.60);
  --transition:all 0.3s ease;
  --font-stack:-apple-system,"PingFang SC","Microsoft YaHei","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-stack);
  background:var(--bg-primary);
  color:var(--text-primary);
  line-height:1.6;
  -webkit-font-smoothing:antialiased;
  font-size:16px;
}
a{
  color:var(--primary);
  text-decoration:none;
  transition:var(--transition);
}
a:hover{color:var(--secondary)}
img{
  max-width:100%;height:auto;display:block;
}
button,input,select,textarea{
  font-family:inherit;outline:none;border:none;
}
ul,ol{list-style:none}

.container{
  max-width:1200px;
  margin:0 auto;
  padding:0 20px;
}
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  padding:12px 28px;
  border-radius:var(--radius-xs);
  font-size:15px;
  font-weight:600;
  cursor:pointer;
  border:1px solid transparent;
  transition:var(--transition);
  line-height:1.4;
  white-space:nowrap;
}
.btn:hover{
  transform:translateY(-2px);
}
.btn:active{
  transform:translateY(0);
}
.btn:focus-visible{
  outline:2px solid var(--primary);
  outline-offset:2px;
}
.btn-primary{
  background:linear-gradient(135deg,#2E6BFF,#22D3EE);
  color:#fff;
  box-shadow:var(--shadow-glow);
}
.btn-primary:hover{
  box-shadow:var(--shadow-glow-hover);
  filter:brightness(1.05);
  color:#fff;
}
.btn-primary:active{
  box-shadow:0 0 10px rgba(46,107,255,0.3);
}
.btn-border{
  background:transparent;
  border:1px solid rgba(255,255,255,0.14);
  color:var(--text-primary);
}
.btn-border:hover{
  background:rgba(255,255,255,0.06);
  border-color:var(--primary);
  color:var(--text-primary);
}
.btn-purple{
  background:linear-gradient(135deg,#2E6BFF,#7C3AED);
  color:#fff;
  box-shadow:0 0 20px rgba(124,58,237,0.35);
}
.tag{
  display:inline-block;
  padding:4px 14px;
  border-radius:999px;
  font-size:13px;
  background:rgba(46,107,255,0.12);
  border:1px solid rgba(46,107,255,0.25);
  color:var(--secondary);
  font-weight:500;
}

.site-header{
  position:sticky;
  top:0;
  z-index:100;
  background:rgba(7,9,15,0.82);
  backdrop-filter:blur(16px);
  -webkit-backdrop-filter:blur(16px);
  border-bottom:1px solid var(--glass-border);
  height:72px;
  transition:var(--transition);
}
.site-header.scrolled{
  background:rgba(7,9,15,0.92);
}
.header-inner{
  height:72px;
  display:flex;
  align-items:center;
  gap:32px;
}
.brand{
  display:flex;
  align-items:center;
  gap:10px;
  color:var(--text-primary);
  font-weight:800;
  font-size:18px;
  letter-spacing:-0.01em;
  flex-shrink:0;
}
.brand:hover{color:var(--text-primary)}
.brand-icon{
  width:32px;height:32px;
  color:var(--primary);
  flex-shrink:0;
}
.brand-text{
  white-space:nowrap;
}
.main-nav{
  display:flex;
  align-items:center;
  gap:8px;
  flex:1;
}
.nav-link{
  position:relative;
  color:var(--text-secondary);
  font-size:15px;
  font-weight:500;
  padding:8px 16px;
  border-radius:8px;
  transition:var(--transition);
}
.nav-link:hover{
  color:var(--text-primary);
  background:rgba(255,255,255,0.04);
}
.nav-link.active{
  color:var(--text-primary);
  background:rgba(46,107,255,0.12);
}
.nav-link.active::after{
  content:'';
  position:absolute;
  left:16px;right:16px;bottom:2px;
  height:2px;
  background:linear-gradient(90deg,var(--primary),var(--secondary));
  border-radius:2px;
}
.header-actions{
  display:flex;
  align-items:center;
  gap:16px;
  margin-left:auto;
}
.search-box{
  position:relative;
  width:260px;
}
.search-icon{
  position:absolute;
  left:12px;top:50%;
  transform:translateY(-50%);
  color:var(--text-muted);
  font-size:14px;
  pointer-events:none;
}
.search-box input{
  width:100%;
  height:38px;
  background:rgba(255,255,255,0.05);
  border:1px solid var(--glass-border);
  border-radius:8px;
  padding:0 14px 0 38px;
  color:var(--text-primary);
  font-size:14px;
  transition:var(--transition);
}
.search-box input:focus{
  border-color:var(--primary);
  box-shadow:0 0 0 3px rgba(46,107,255,0.15);
}
.search-box input::placeholder{
  color:var(--text-muted);
}
.btn-login{
  color:var(--text-secondary);
  font-size:14px;
  font-weight:500;
  padding:6px 12px;
  border-radius:8px;
  transition:var(--transition);
}
.btn-login:hover{
  color:var(--text-primary);
  background:rgba(255,255,255,0.05);
}
.btn-nav{
  padding:9px 22px;
  font-size:14px;
}
.nav-toggle{
  display:none;
  background:rgba(255,255,255,0.05);
  border:1px solid var(--glass-border);
  border-radius:8px;
  width:40px;height:40px;
  color:var(--text-primary);
  font-size:18px;
  cursor:pointer;
  align-items:center;
  justify-content:center;
}

.article-hero{
  position:relative;
  padding:72px 0 64px;
  background:linear-gradient(180deg,rgba(7,9,15,0.75) 0%,rgba(7,9,15,0.55) 60%,rgba(7,9,15,0.9) 100%),url('/assets/images/backpic/back-1.png') center/cover no-repeat;
  border-bottom:1px solid var(--glass-border);
}
.breadcrumb{
  display:flex;
  align-items:center;
  flex-wrap:wrap;
  gap:8px;
  font-size:14px;
  color:var(--text-muted);
  margin-bottom:28px;
}
.breadcrumb a{
  color:var(--text-secondary);
}
.breadcrumb a:hover{
  color:var(--primary);
}
.breadcrumb .sep{
  color:var(--text-muted);
  margin:0 2px;
}
.breadcrumb .current{
  color:var(--text-secondary);
  font-weight:500;
}
.article-head{
  max-width:860px;
}
.article-head h1{
  font-size:32px;
  font-weight:800;
  line-height:1.35;
  letter-spacing:-0.01em;
  color:var(--text-primary);
  margin-bottom:20px;
}
.article-meta{
  display:flex;
  align-items:center;
  flex-wrap:wrap;
  gap:16px;
  font-size:14px;
  color:var(--text-secondary);
}
.meta-item{
  display:inline-flex;
  align-items:center;
  gap:6px;
}
.meta-item i{
  color:var(--primary);
  font-size:14px;
}
.meta-tag{
  display:inline-block;
  padding:4px 16px;
  border-radius:999px;
  background:rgba(46,107,255,0.12);
  border:1px solid rgba(46,107,255,0.28);
  color:var(--secondary);
  font-size:13px;
  font-weight:500;
}

.article-body-section{
  padding:64px 0 32px;
  background:var(--bg-primary);
}
.article-inner{
  max-width:860px;
  margin:0 auto;
}
.article-content{
  font-size:16px;
  line-height:1.9;
  color:var(--text-primary);
  background:rgba(255,255,255,0.03);
  border:1px solid var(--glass-border);
  border-radius:var(--radius-lg);
  padding:48px;
  box-shadow:var(--shadow-card);
}
.article-content p{
  margin-bottom:1.5em;
}
.article-content h2{
  font-size:28px;
  font-weight:800;
  margin:2em 0 0.75em;
  color:var(--text-primary);
  letter-spacing:-0.01em;
  line-height:1.4;
}
.article-content h3{
  font-size:20px;
  font-weight:700;
  margin:1.8em 0 0.6em;
  color:var(--text-primary);
  line-height:1.5;
}
.article-content h4{
  font-size:17px;
  font-weight:700;
  margin:1.5em 0 0.5em;
  color:var(--text-primary);
}
.article-content a{
  color:var(--primary);
  border-bottom:1px solid rgba(46,107,255,0.3);
  padding-bottom:1px;
}
.article-content a:hover{
  color:var(--secondary);
  border-color:var(--secondary);
}
.article-content img{
  border-radius:var(--radius-sm);
  margin:1.8em 0;
  box-shadow:var(--shadow-card);
}
.article-content blockquote{
  border-left:3px solid var(--primary);
  background:rgba(46,107,255,0.06);
  padding:18px 22px;
  border-radius:0 var(--radius-sm) var(--radius-sm) 0;
  margin:1.6em 0;
  color:var(--text-secondary);
  font-style:normal;
}
.article-content ul,
.article-content ol{
  margin:1em 0 1.5em;
  padding-left:1.6em;
}
.article-content ul li{
  list-style:disc;
  margin-bottom:0.5em;
}
.article-content ol li{
  list-style:decimal;
  margin-bottom:0.5em;
}
.article-content li::marker{
  color:var(--primary);
}
.article-content code{
  background:rgba(255,255,255,0.08);
  padding:2px 8px;
  border-radius:4px;
  font-size:14px;
  font-family:'SFMono-Regular',Consolas,'Liberation Mono',monospace;
  color:var(--secondary);
}
.article-content pre{
  background:#0a0e1a;
  border:1px solid var(--glass-border);
  border-radius:var(--radius-sm);
  padding:22px;
  overflow-x:auto;
  margin:1.6em 0;
  line-height:1.6;
}
.article-content pre code{
  background:none;
  color:var(--text-primary);
  font-size:14px;
  padding:0;
}
.article-content hr{
  border:none;
  border-top:1px solid var(--glass-border);
  margin:2.5em 0;
}
.article-content table{
  width:100%;
  border-collapse:collapse;
  margin:1.6em 0;
  font-size:15px;
}
.article-content table th,
.article-content table td{
  padding:12px 14px;
  border:1px solid var(--glass-border);
  text-align:left;
}
.article-content table th{
  background:var(--bg-tertiary);
  font-weight:600;
}

.article-empty{
  text-align:center;
  padding:80px 20px;
  background:rgba(255,255,255,0.03);
  border:1px solid var(--glass-border);
  border-radius:var(--radius-lg);
}
.article-empty i{
  font-size:48px;
  color:var(--text-muted);
  margin-bottom:16px;
  display:block;
}
.article-empty p{
  font-size:18px;
  color:var(--text-secondary);
  margin-bottom:24px;
}

.article-back{
  text-align:center;
  padding:40px 0 0;
}

.cta-section{
  padding:64px 0;
}
.cta-panel{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:32px;
  background:var(--glass-bg);
  border:1px solid var(--glass-border);
  border-radius:var(--radius-lg);
  padding:40px 48px;
  backdrop-filter:blur(12px);
  box-shadow:var(--shadow-card);
}
.cta-text h2{
  font-size:24px;
  font-weight:800;
  margin-bottom:8px;
  color:var(--text-primary);
}
.cta-text p{
  font-size:15px;
  color:var(--text-secondary);
}

.related-section{
  padding:32px 0 64px;
  background:var(--bg-primary);
}
.section-head{
  display:flex;
  align-items:center;
  justify-content:space-between;
  margin-bottom:36px;
}
.section-head h2{
  font-size:30px;
  font-weight:800;
  color:var(--text-primary);
  letter-spacing:-0.01em;
}
.section-more{
  color:var(--text-secondary);
  font-size:15px;
  display:inline-flex;
  align-items:center;
  gap:6px;
  transition:var(--transition);
}
.section-more:hover{
  color:var(--primary);
  gap:10px;
}
.related-grid{
  display:grid;
  grid-template-columns:repeat(3,1fr);
  gap:24px;
}
.related-card{
  background:rgba(255,255,255,0.03);
  border:1px solid var(--glass-border);
  border-radius:var(--radius-md);
  overflow:hidden;
  transition:var(--transition);
  display:block;
  color:var(--text-primary);
}
.related-card:hover{
  background:rgba(255,255,255,0.06);
  border-color:rgba(46,107,255,0.35);
  box-shadow:var(--shadow-hover);
  transform:translateY(-4px);
  color:var(--text-primary);
}
.related-thumb{
  aspect-ratio:16/9;
  overflow:hidden;
  background:rgba(255,255,255,0.04);
}
.related-thumb img{
  width:100%;height:100%;object-fit:cover;
  transition:transform 0.4s ease;
}
.related-card:hover .related-thumb img{
  transform:scale(1.05);
}
.related-body{
  padding:22px;
}
.related-body h3{
  font-size:18px;
  font-weight:700;
  margin-bottom:10px;
  line-height:1.4;
}
.related-body p{
  font-size:14px;
  color:var(--text-secondary);
  line-height:1.6;
  display:-webkit-box;
  -webkit-line-clamp:2;
  -webkit-box-orient:vertical;
  overflow:hidden;
  margin-bottom:14px;
}
.related-tags{
  display:flex;
  gap:8px;
  flex-wrap:wrap;
}

.faq-section{
  padding:64px 0 80px;
  background:var(--bg-secondary);
  border-top:1px solid var(--glass-border);
}
.section-head.center{
  justify-content:center;
  text-align:center;
}
.faq-list{
  max-width:780px;
  margin:0 auto;
}
.faq-item{
  background:rgba(255,255,255,0.03);
  border:1px solid var(--glass-border);
  border-radius:var(--radius-sm);
  margin-bottom:16px;
  overflow:hidden;
  transition:var(--transition);
}
.faq-item:hover{
  border-color:rgba(46,107,255,0.25);
}
.faq-question{
  width:100%;
  background:transparent;
  border:none;
  padding:18px 22px;
  font-size:16px;
  font-weight:600;
  color:var(--text-primary);
  cursor:pointer;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:16px;
  text-align:left;
  transition:var(--transition);
}
.faq-question i{
  color:var(--primary);
  transition:transform 0.3s ease;
  flex-shrink:0;
  font-size:14px;
}
.faq-item.active .faq-question i{
  transform:rotate(45deg);
}
.faq-answer{
  padding:0 22px 18px;
  font-size:14px;
  color:var(--text-secondary);
  line-height:1.7;
  display:none;
}
.faq-item.active .faq-answer{
  display:block;
}

.site-footer{
  background:#04060C;
  border-top:1px solid var(--glass-border);
  padding:64px 0 0;
}
.footer-grid{
  display:grid;
  grid-template-columns:1.4fr 1fr 1fr 1fr;
  gap:40px;
  padding-bottom:48px;
}
.footer-col h4{
  font-size:16px;
  font-weight:700;
  color:var(--text-primary);
  margin-bottom:16px;
}
.footer-col p{
  font-size:14px;
  color:var(--text-secondary);
  line-height:1.7;
}
.footer-col ul li{
  margin-bottom:10px;
}
.footer-col ul li a{
  color:var(--text-secondary);
  font-size:14px;
  transition:var(--transition);
}
.footer-col ul li a:hover{
  color:var(--primary);
}
.footer-contact li{
  display:flex;
  align-items:center;
  gap:10px;
  color:var(--text-secondary);
  font-size:14px;
}
.footer-contact i{
  color:var(--primary);
  width:18px;
  text-align:center;
}
.footer-bottom{
  border-top:1px solid var(--glass-border);
  padding:20px 0;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:16px;
  flex-wrap:wrap;
}
.footer-bottom p{
  font-size:13px;
  color:var(--text-muted);
}
.back-top{
  display:inline-flex;
  align-items:center;
  gap:8px;
  background:rgba(255,255,255,0.04);
  border:1px solid var(--glass-border);
  border-radius:8px;
  padding:8px 16px;
  color:var(--text-secondary);
  font-size:13px;
  cursor:pointer;
  transition:var(--transition);
}
.back-top:hover{
  color:var(--primary);
  background:rgba(46,107,255,0.08);
  border-color:rgba(46,107,255,0.3);
}

@media(max-width:1023px){
  .main-nav{
    display:none;
    position:absolute;
    top:72px;
    left:0;
    right:0;
    background:rgba(7,9,15,0.95);
    backdrop-filter:blur(20px);
    flex-direction:column;
    padding:16px 20px;
    gap:4px;
    border-bottom:1px solid var(--glass-border);
  }
  .main-nav.open{
    display:flex;
  }
  .nav-link{
    width:100%;
    padding:12px 16px;
  }
  .nav-link.active::after{
    display:none;
  }
  .search-box{
    width:200px;
  }
  .nav-toggle{
    display:flex;
  }
  .cta-panel{
    flex-direction:column;
    text-align:center;
    padding:32px;
  }
  .related-grid{
    grid-template-columns:repeat(2,1fr);
  }
  .footer-grid{
    grid-template-columns:1fr 1fr;
  }
}

@media(max-width:767px){
  .container{
    padding:0 16px;
  }
  .site-header{
    height:60px;
  }
  .header-inner{
    height:60px;
    gap:12px;
  }
  .main-nav{
    top:60px;
  }
  .brand-text{
    font-size:16px;
  }
  .search-box{
    display:none;
  }
  .btn-login{
    display:none;
  }
  .btn-nav{
    padding:8px 16px;
    font-size:13px;
  }
  .article-hero{
    padding:48px 0 40px;
  }
  .article-head h1{
    font-size:28px;
  }
  .article-meta{
    gap:12px;
    font-size:13px;
  }
  .article-content{
    padding:28px 20px;
    border-radius:var(--radius-md);
  }
  .article-content h2{
    font-size:22px;
  }
  .article-content h3{
    font-size:18px;
  }
  .article-back{
    padding-top:24px;
  }
  .cta-section{
    padding:40px 0;
  }
  .cta-panel{
    padding:24px 20px;
  }
  .cta-text h2{
    font-size:20px;
  }
  .cta-text p{
    font-size:14px;
  }
  .related-grid{
    grid-template-columns:1fr;
  }
  .section-head h2{
    font-size:24px;
  }
  .faq-section{
    padding:48px 0 56px;
  }
  .footer-grid{
    grid-template-columns:1fr;
    gap:32px;
  }
  .footer-bottom{
    flex-direction:column;
    text-align:center;
  }
}

/* roulang page: category2 */
/* ===== 设计变量 ===== */
    :root {
      --bg-primary: #07090F;
      --bg-secondary: #0D1225;
      --bg-tertiary: #111731;
      --primary: #2E6BFF;
      --accent: #22D3EE;
      --purple: #7C3AED;
      --text-primary: #E6EAF2;
      --text-secondary: #98A2B3;
      --text-muted: #667085;
      --success: #10B981;
      --warning: #F43F5E;
      --glass-bg: rgba(255,255,255,0.04);
      --glass-border: rgba(255,255,255,0.08);
      --glass-border-strong: rgba(255,255,255,0.12);
      --radius-lg: 24px;
      --radius-md: 16px;
      --radius-sm: 12px;
      --radius-xs: 8px;
      --shadow-card: 0 8px 32px rgba(0,0,0,0.35);
      --shadow-hover: 0 16px 48px rgba(0,0,0,0.50), 0 0 0 1px rgba(46,107,255,0.25);
      --glow-primary: 0 0 20px rgba(46,107,255,0.40);
      --glow-hover: 0 0 32px rgba(46,107,255,0.60);
      --transition: all 0.3s ease;
      --font-sans: -apple-system, "PingFang SC", "Microsoft YaHei", "Noto Sans CJK SC", sans-serif;
    }

    /* ===== Reset & Base ===== */
    *, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
    html { scroll-behavior: smooth; }
    body {
      font-family: var(--font-sans);
      background: var(--bg-primary);
      color: var(--text-primary);
      line-height: 1.7;
      font-size: 16px;
      -webkit-font-smoothing: antialiased;
      overflow-x: hidden;
    }
    img { max-width: 100%; display: block; }
    a { color: inherit; text-decoration: none; transition: var(--transition); }
    ul, ol { list-style: none; }
    input, textarea, select, button { font-family: inherit; font-size: inherit; color: inherit; }
    button { cursor: pointer; border: none; background: none; }
    .container { max-width: 1200px; margin: 0 auto; padding: 0 20px; }
    h1, h2, h3, h4 { line-height: 1.3; letter-spacing: -0.01em; }

    /* ===== 按钮 ===== */
    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 8px;
      padding: 12px 28px;
      border-radius: var(--radius-xs);
      font-size: 15px;
      font-weight: 600;
      transition: var(--transition);
      white-space: nowrap;
      border: 1px solid transparent;
    }
    .btn-primary {
      background: linear-gradient(135deg, var(--primary), var(--accent));
      color: #fff;
      box-shadow: var(--glow-primary);
    }
    .btn-primary:hover {
      transform: translateY(-2px);
      box-shadow: var(--glow-hover);
      filter: brightness(1.05);
    }
    .btn-primary:active {
      transform: translateY(1px);
      box-shadow: 0 0 12px rgba(46,107,255,0.20);
    }
    .btn-primary:focus-visible {
      outline: 2px solid var(--primary);
      outline-offset: 2px;
    }
    .btn-secondary {
      background: transparent;
      border: 1px solid rgba(255,255,255,0.14);
      color: var(--text-primary);
    }
    .btn-secondary:hover {
      background: rgba(255,255,255,0.06);
      border-color: var(--primary);
    }
    .btn-secondary:focus-visible {
      outline: 2px solid var(--primary);
      outline-offset: 2px;
    }
    .btn-nav {
      padding: 8px 18px;
      font-size: 14px;
    }

    /* ===== Header / 导航 ===== */
    .site-header {
      position: sticky;
      top: 0;
      z-index: 1000;
      background: rgba(7,9,15,0.82);
      backdrop-filter: blur(16px);
      -webkit-backdrop-filter: blur(16px);
      border-bottom: 1px solid var(--glass-border);
      height: 72px;
      transition: background 0.3s;
    }
    .site-header.scrolled { background: rgba(7,9,15,0.92); }
    .header-inner {
      display: flex;
      align-items: center;
      justify-content: space-between;
      height: 100%;
      gap: 24px;
    }
    .brand { display: flex; align-items: center; gap: 10px; flex-shrink: 0; }
    .brand-icon { width: 32px; height: 32px; color: var(--primary); }
    .brand-text { font-size: 20px; font-weight: 800; letter-spacing: -0.01em; color: var(--text-primary); }
    .main-nav { display: flex; gap: 28px; margin: 0 auto; }
    .nav-link {
      font-size: 15px;
      color: var(--text-secondary);
      padding: 8px 4px;
      position: relative;
      transition: color 0.3s;
      font-weight: 500;
    }
    .nav-link::after {
      content: '';
      position: absolute;
      bottom: 0;
      left: 0;
      width: 0;
      height: 2px;
      background: linear-gradient(135deg, var(--primary), var(--accent));
      border-radius: 2px;
      transition: width 0.3s;
    }
    .nav-link:hover { color: var(--text-primary); }
    .nav-link:hover::after { width: 100%; }
    .nav-link.active { color: var(--text-primary); }
    .nav-link.active::after { width: 100%; }
    .header-actions { display: flex; align-items: center; gap: 14px; flex-shrink: 0; }
    .search-box {
      display: flex;
      align-items: center;
      background: rgba(255,255,255,0.06);
      border: 1px solid var(--glass-border);
      border-radius: var(--radius-xs);
      padding: 0 12px;
      height: 36px;
      width: 260px;
      transition: var(--transition);
    }
    .search-box:focus-within {
      border-color: var(--primary);
      box-shadow: 0 0 12px rgba(46,107,255,0.2);
    }
    .search-box input {
      background: transparent;
      border: none;
      outline: none;
      color: var(--text-primary);
      width: 100%;
      font-size: 14px;
      height: 100%;
    }
    .search-box input::placeholder { color: var(--text-muted); }
    .search-icon { color: var(--text-muted); font-size: 14px; margin-right: 8px; flex-shrink: 0; }
    .btn-login { font-size: 14px; color: var(--text-secondary); font-weight: 500; padding: 6px 10px; }
    .btn-login:hover { color: var(--text-primary); }
    .nav-toggle { display: none; font-size: 20px; color: var(--text-primary); width: 36px; height: 36px; align-items: center; justify-content: center; border-radius: var(--radius-xs); }
    .nav-toggle:hover { background: rgba(255,255,255,0.06); }

    /* ===== Hero / 分类页首屏 ===== */
    .page-hero {
      position: relative;
      min-height: 640px;
      display: flex;
      align-items: center;
      background: url('/assets/images/backpic/back-2.png') center center / cover no-repeat;
      padding: 80px 0 64px;
    }
    .page-hero::before {
      content: '';
      position: absolute;
      inset: 0;
      background: linear-gradient(180deg, rgba(7,9,15,0.80) 0%, rgba(7,9,15,0.55) 50%, rgba(7,9,15,0.90) 100%);
    }
    .page-hero .container { position: relative; z-index: 1; text-align: center; }
    .hero-panel {
      position: relative;
      max-width: 760px;
      margin: 0 auto;
      text-align: center;
      background: rgba(255,255,255,0.04);
      border: 1px solid var(--glass-border);
      border-radius: var(--radius-lg);
      padding: 56px 48px;
      backdrop-filter: blur(20px);
      -webkit-backdrop-filter: blur(20px);
      overflow: hidden;
    }
    .hero-panel::before {
      content: '';
      position: absolute;
      top: -80px;
      left: -40px;
      width: 300px;
      height: 300px;
      border-radius: 50%;
      background: radial-gradient(circle, rgba(46,107,255,0.10), transparent 70%);
      pointer-events: none;
    }
    .hero-badge {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      padding: 5px 18px;
      border-radius: 999px;
      border: 1px solid rgba(46,107,255,0.40);
      font-size: 13px;
      color: var(--accent);
      background: rgba(46,107,255,0.10);
      margin-bottom: 24px;
      font-weight: 500;
    }
    .hero-badge::before {
      content: '';
      width: 6px;
      height: 6px;
      border-radius: 50%;
      background: var(--primary);
      box-shadow: 0 0 8px rgba(46,107,255,0.8);
    }
    .page-hero h1 {
      font-size: 44px;
      font-weight: 800;
      line-height: 1.2;
      margin-bottom: 16px;
      letter-spacing: -0.01em;
    }
    .text-gradient {
      background: linear-gradient(135deg, var(--primary), var(--accent));
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      background-clip: text;
    }
    .hero-sub {
      font-size: 17px;
      color: var(--text-secondary);
      line-height: 1.8;
      margin-bottom: 32px;
      max-width: 560px;
      margin-left: auto;
      margin-right: auto;
    }
    .hero-actions { display: flex; gap: 16px; justify-content: center; flex-wrap: wrap; }
    .hero-stats {
      display: flex;
      justify-content: center;
      gap: 24px;
      margin-top: 40px;
      flex-wrap: wrap;
    }
    .stat-item {
      text-align: center;
      padding: 18px 32px;
      background: rgba(255,255,255,0.04);
      border: 1px solid var(--glass-border);
      border-radius: var(--radius-sm);
      backdrop-filter: blur(12px);
      -webkit-backdrop-filter: blur(12px);
      min-width: 140px;
    }
    .stat-num {
      display: block;
      font-size: 28px;
      font-weight: 800;
      color: var(--text-primary);
      font-variant-numeric: tabular-nums;
      margin-bottom: 4px;
    }
    .stat-label { font-size: 13px; color: var(--text-muted); }

    /* ===== Section 通用 ===== */
    .section { padding: 96px 0; }
    .section-header { text-align: center; margin-bottom: 56px; }
    .section-header h2 {
      font-size: 32px;
      font-weight: 800;
      margin-bottom: 12px;
      letter-spacing: -0.01em;
    }
    .section-header p { font-size: 16px; color: var(--text-secondary); max-width: 600px; margin: 0 auto; }

    /* ===== 教程卡片网格 ===== */
    .tutorial-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }
    .tutorial-card {
      background: rgba(255,255,255,0.03);
      border: 1px solid var(--glass-border);
      border-radius: var(--radius-md);
      overflow: hidden;
      transition: var(--transition);
      display: flex;
      flex-direction: column;
    }
    .tutorial-card:hover {
      background: rgba(255,255,255,0.06);
      border-color: rgba(46,107,255,0.40);
      transform: translateY(-4px);
      box-shadow: var(--shadow-hover);
    }
    .card-media { position: relative; height: 220px; overflow: hidden; background: var(--bg-tertiary); }
    .card-media img { width: 100%; height: 100%; object-fit: cover; transition: transform 0.5s; }
    .tutorial-card:hover .card-media img { transform: scale(1.04); }
    .card-body { padding: 24px; display: flex; flex-direction: column; flex: 1; }
    .card-body h3 { font-size: 18px; font-weight: 700; margin-bottom: 8px; line-height: 1.4; }
    .card-body p { font-size: 14px; color: var(--text-secondary); line-height: 1.7; margin-bottom: 16px; flex: 1; }
    .card-tags { display: flex; gap: 8px; flex-wrap: wrap; margin-bottom: 14px; }
    .tag {
      display: inline-block;
      padding: 4px 12px;
      border-radius: 999px;
      background: rgba(46,107,255,0.12);
      color: var(--accent);
      font-size: 12px;
      font-weight: 500;
    }
    .card-link {
      display: inline-flex;
      align-items: center;
      gap: 6px;
      font-size: 14px;
      font-weight: 600;
      color: var(--primary);
      transition: gap 0.3s, color 0.3s;
    }
    .card-link:hover { gap: 10px; color: var(--accent); }
    .card-link i { font-size: 12px; }

    /* ===== 特色优势 ===== */
    .features-section { background: var(--bg-primary); }
    .features-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 24px;
    }
    .feature-card {
      background: rgba(255,255,255,0.03);
      border: 1px solid var(--glass-border);
      border-radius: var(--radius-md);
      padding: 32px 20px;
      text-align: center;
      transition: var(--transition);
    }
    .feature-card:hover {
      border-color: var(--glass-border-strong);
      transform: translateY(-4px);
      background: rgba(255,255,255,0.05);
    }
    .feature-icon {
      font-size: 28px;
      color: var(--primary);
      margin-bottom: 14px;
      display: block;
    }
    .feature-card h3 { font-size: 16px; font-weight: 600; margin-bottom: 8px; color: var(--text-primary); }
    .feature-card p { font-size: 13px; color: var(--text-muted); line-height: 1.6; }

    /* ===== 操作路径 ===== */
    .process-section {
      background: var(--bg-secondary);
      border-top: 1px solid var(--glass-border);
      border-bottom: 1px solid var(--glass-border);
      padding: 96px 0;
    }
    .process-wrapper {
      display: grid;
      grid-template-columns: 5fr 7fr;
      gap: 56px;
      align-items: center;
    }
    .process-image {
      border-radius: var(--radius-md);
      overflow: hidden;
      height: 100%;
      min-height: 320px;
      background: var(--bg-tertiary);
    }
    .process-image img { width: 100%; height: 100%; object-fit: cover; }
    .process-content h3 {
      font-size: 28px;
      font-weight: 800;
      margin-bottom: 16px;
      line-height: 1.3;
    }
    .process-content > p {
      color: var(--text-secondary);
      margin-bottom: 40px;
      font-size: 15px;
      max-width: 420px;
    }
    .process-steps { position: relative; }
    .process-steps::before {
      content: '';
      position: absolute;
      left: 15px;
      top: 20px;
      bottom: 20px;
      width: 2px;
      background: linear-gradient(180deg, var(--primary), var(--accent));
      border-radius: 2px;
      opacity: 0.4;
    }
    .step-item { position: relative; padding-left: 56px; margin-bottom: 36px; }
    .step-item:last-child { margin-bottom: 0; }
    .step-num {
      position: absolute;
      left: 0;
      top: 0;
      width: 32px;
      height: 32px;
      border-radius: 50%;
      background: var(--bg-primary);
      border: 2px solid var(--primary);
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 14px;
      font-weight: 700;
      color: var(--primary);
      font-variant-numeric: tabular-nums;
    }
    .step-item h4 { font-size: 16px; font-weight: 600; margin-bottom: 6px; color: var(--text-primary); }
    .step-item p { font-size: 14px; color: var(--text-secondary); line-height: 1.7; }

    /* ===== FAQ ===== */
    .faq-section { padding-bottom: 96px; }
    .faq-wrap { max-width: 860px; margin: 0 auto; }
    .accordion {
      background: rgba(255,255,255,0.03) !important;
      border: 1px solid var(--glass-border) !important;
      border-radius: var(--radius-md) !important;
      overflow: hidden;
    }
    .accordion-item {
      background: transparent !important;
      border-bottom: 1px solid var(--glass-border) !important;
    }
    .accordion-item:last-child { border-bottom: none !important; }
    .accordion-title {
      background: transparent !important;
      color: var(--text-primary) !important;
      font-size: 16px !important;
      font-weight: 600 !important;
      padding: 20px 24px !important;
      display: flex;
      align-items: center;
      justify-content: space-between;
      position: relative;
      transition: background 0.3s;
    }
    .accordion-title:hover { background: rgba(255,255,255,0.03) !important; }
    .accordion-title::before { display: none; }
    .accordion-title::after {
      content: '+';
      font-size: 22px;
      font-weight: 400;
      color: var(--primary);
      line-height: 1;
      flex-shrink: 0;
      margin-left: 16px;
      transition: transform 0.3s;
    }
    .accordion-item.is-active .accordion-title::after { content: '×'; }
    .accordion-content {
      background: transparent !important;
      color: var(--text-secondary) !important;
      font-size: 14px !important;
      line-height: 1.8 !important;
      padding: 0 24px 20px !important;
      border-top: none !important;
    }

    /* ===== CTA ===== */
    .cta-section { padding-bottom: 96px; }
    .cta-panel {
      position: relative;
      background: var(--bg-secondary);
      border: 1px solid rgba(46,107,255,0.30);
      border-radius: var(--radius-lg);
      padding: 48px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 32px;
      overflow: hidden;
    }
    .cta-panel::before {
      content: '';
      position: absolute;
      top: -80px;
      right: -40px;
      width: 240px;
      height: 240px;
      border-radius: 50%;
      background: radial-gradient(circle, rgba(46,107,255,0.14), transparent 70%);
      pointer-events: none;
    }
    .cta-panel::after {
      content: '';
      position: absolute;
      bottom: -60px;
      left: 30%;
      width: 160px;
      height: 160px;
      border-radius: 50%;
      background: radial-gradient(circle, rgba(124,58,237,0.10), transparent 70%);
      pointer-events: none;
    }
    .cta-content { position: relative; z-index: 1; }
    .cta-content h3 { font-size: 24px; font-weight: 700; margin-bottom: 8px; color: var(--text-primary); }
    .cta-content p { color: var(--text-secondary); font-size: 15px; max-width: 480px; }
    .cta-actions { position: relative; z-index: 1; flex-shrink: 0; }

    /* ===== Footer ===== */
    .site-footer {
      background: #05070C;
      border-top: 1px solid var(--glass-border);
      padding: 64px 0 24px;
    }
    .footer-grid {
      display: grid;
      grid-template-columns: 2fr 1fr 1fr 1.2fr;
      gap: 40px;
      margin-bottom: 48px;
    }
    .footer-col h4 { font-size: 16px; font-weight: 700; margin-bottom: 16px; color: var(--text-primary); }
    .footer-col p { font-size: 14px; color: var(--text-muted); line-height: 1.8; }
    .footer-col ul li { margin-bottom: 10px; }
    .footer-col ul li a { font-size: 14px; color: var(--text-muted); transition: color 0.3s; }
    .footer-col ul li a:hover { color: var(--primary); }
    .footer-contact li {
      font-size: 14px;
      color: var(--text-muted);
      display: flex;
      align-items: center;
      gap: 10px;
      margin-bottom: 12px;
    }
    .footer-contact i { color: var(--primary); width: 16px; text-align: center; }
    .footer-bottom {
      border-top: 1px solid var(--glass-border);
      padding-top: 24px;
      display: flex;
      justify-content: space-between;
      align-items: center;
      flex-wrap: wrap;
      gap: 16px;
    }
    .footer-bottom p { font-size: 13px; color: var(--text-muted); }
    .back-top {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      font-size: 13px;
      color: var(--text-secondary);
      padding: 8px 16px;
      border: 1px solid var(--glass-border);
      border-radius: var(--radius-xs);
      transition: var(--transition);
      background: transparent;
    }
    .back-top:hover { border-color: var(--primary); color: var(--primary); }

    /* ===== 响应式：平板 ===== */
    @media (max-width: 1023px) {
      .main-nav {
        display: flex;
        flex-direction: column;
        position: fixed;
        top: 72px;
        left: 16px;
        right: 16px;
        background: rgba(7,9,15,0.97);
        backdrop-filter: blur(20px);
        border: 1px solid var(--glass-border-strong);
        border-radius: 12px;
        padding: 12px;
        gap: 4px;
        margin: 0;
        opacity: 0;
        transform: translateY(-12px);
        pointer-events: none;
        transition: all 0.3s;
        z-index: 999;
      }
      .main-nav.open {
        opacity: 1;
        transform: translateY(0);
        pointer-events: auto;
      }
      .nav-link {
        padding: 12px 16px;
        border-radius: 8px;
        font-size: 15px;
        color: var(--text-primary);
      }
      .nav-link:hover { background: rgba(255,255,255,0.05); }
      .nav-link.active { background: rgba(46,107,255,0.12); color: var(--accent); }
      .nav-link.active::after { display: none; }
      .nav-toggle { display: inline-flex; }
      .search-box { width: 200px; }
      .tutorial-grid { grid-template-columns: repeat(2, 1fr); }
      .features-grid { grid-template-columns: repeat(2, 1fr); }
      .process-wrapper { grid-template-columns: 1fr; gap: 32px; }
      .process-image { min-height: 260px; }
      .footer-grid { grid-template-columns: 1fr 1fr; gap: 32px; }
    }

    /* ===== 响应式：手机 ===== */
    @media (max-width: 767px) {
      .site-header { height: 60px; }
      .header-inner { gap: 12px; }
      .brand-icon { width: 28px; height: 28px; }
      .brand-text { font-size: 18px; }
      .search-box {
        width: 36px;
        height: 36px;
        padding: 0;
        background: transparent;
        border: none;
        justify-content: center;
      }
      .search-box .search-icon { margin: 0; font-size: 16px; }
      .search-box input { display: none; }
      .search-box.expanded {
        width: 180px;
        background: rgba(255,255,255,0.08);
        border: 1px solid var(--glass-border-strong);
        padding: 0 10px;
        justify-content: flex-start;
      }
      .search-box.expanded input { display: block; }
      .search-box.expanded .search-icon { margin-right: 8px; }
      .btn-login { display: none; }
      .btn-nav { padding: 6px 14px; font-size: 13px; }
      .page-hero { min-height: 520px; padding: 60px 0 48px; }
      .hero-panel { padding: 40px 24px; border-radius: 16px; }
      .page-hero h1 { font-size: 28px; }
      .hero-sub { font-size: 15px; }
      .hero-actions { flex-direction: column; align-items: center; }
      .hero-actions .btn { width: 100%; max-width: 280px; }
      .hero-stats { gap: 12px; }
      .stat-item { padding: 14px 18px; min-width: 100px; }
      .stat-num { font-size: 22px; }
      .stat-label { font-size: 12px; }
      .section { padding: 56px 0; }
      .section-header { margin-bottom: 40px; }
      .section-header h2 { font-size: 24px; }
      .tutorial-grid { grid-template-columns: 1fr; }
      .features-grid { grid-template-columns: 1fr 1fr; gap: 16px; }
      .feature-card { padding: 24px 16px; }
      .process-section { padding: 56px 0; }
      .process-section .section-header h2 { font-size: 22px; }
      .process-content h3 { font-size: 22px; }
      .cta-panel { flex-direction: column; padding: 32px 20px; text-align: center; }
      .cta-actions { width: 100%; }
      .cta-actions .btn { width: 100%; }
      .section-header p { font-size: 15px; }
      .footer-grid { grid-template-columns: 1fr; gap: 28px; }
      .footer-bottom { flex-direction: column; text-align: center; }
      .accordion-title { padding: 16px 18px !important; font-size: 15px !important; }
      .accordion-content { padding: 0 18px 16px !important; font-size: 13px !important; }
    }

    /* ===== 焦点可见性 ===== */
    a:focus-visible, button:focus-visible {
      outline: 2px solid var(--primary);
      outline-offset: 2px;
    }

    /* ===== 滚动条 ===== */
    ::-webkit-scrollbar { width: 8px; height: 8px; }
    ::-webkit-scrollbar-track { background: var(--bg-primary); }
    ::-webkit-scrollbar-thumb { background: rgba(46,107,255,0.4); border-radius: 4px; }
    ::-webkit-scrollbar-thumb:hover { background: rgba(46,107,255,0.6); }