/* roulang page: index */
/* ===== 设计变量 ===== */
:root {
  --bg-primary: #0a0d14;
  --bg-secondary: #0b0f18;
  --bg-card: #151c2c;
  --bg-card-hover: #1b2438;
  --bg-dark: #070a10;
  --accent: #00e5ff;
  --accent-dim: #0891b2;
  --accent-pink: #ff2d95;
  --accent-gold: #f5c451;
  --text-primary: #f2f6ff;
  --text-secondary: #a6b0c3;
  --text-muted: #6b7688;
  --border: rgba(255,255,255,0.08);
  --border-strong: rgba(255,255,255,0.16);
  --glow-cyan: rgba(0,229,255,0.55);
  --glow-pink: rgba(255,45,149,0.45);
  --radius-lg: 20px;
  --radius-md: 14px;
  --radius-sm: 10px;
  --shadow-card: 0 8px 30px rgba(0,0,0,0.45);
  --shadow-glow: 0 0 24px rgba(0,229,255,0.25);
  --transition: all 0.3s cubic-bezier(0.25, 0.46, 0.45, 0.94);
  --font-sans: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", "HarmonyOS Sans SC", "Noto Sans CJK SC", sans-serif;
  --font-mono: "SF Mono", "Cascadia Code", Consolas, "Roboto Mono", monospace;
}
/* ===== Reset / Base ===== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.6;
  color: var(--text-primary);
  background: var(--bg-primary);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}
img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; transition: var(--transition); }
button { font-family: inherit; cursor: pointer; border: none; background: none; color: inherit; }
input, select, textarea { font-family: inherit; font-size: 15px; }
ul, ol { list-style: none; }
:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
  border-radius: 4px;
}
/* ===== 容器 ===== */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}
.section {
  padding: clamp(64px, 8vw, 96px) 0;
  position: relative;
}
.section-header {
  text-align: center;
  margin-bottom: 48px;
}
.section-header h2 {
  font-size: clamp(30px, 4vw, 38px);
  font-weight: 700;
  line-height: 1.25;
  margin-bottom: 16px;
}
.section-header p {
  font-size: 16px;
  color: var(--text-secondary);
  max-width: 640px;
  margin: 0 auto;
}
.section-header .header-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  flex-wrap: wrap;
}
/* ===== 按钮 ===== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 0 28px;
  border-radius: var(--radius-sm);
  font-size: 15px;
  font-weight: 600;
  letter-spacing: 0.3px;
  transition: var(--transition);
  position: relative;
  overflow: hidden;
  white-space: nowrap;
}
.btn-primary {
  background: linear-gradient(135deg, var(--accent) 0%, #4dd8ff 100%);
  color: #062a33;
  box-shadow: 0 4px 20px rgba(0,229,255,0.3);
}
.btn-primary:hover {
  box-shadow: 0 6px 32px rgba(0,229,255,0.5);
  transform: translateY(-2px);
  background: linear-gradient(135deg, #33e9ff 0%, #66e2ff 100%);
}
.btn-primary:active {
  transform: translateY(0) scale(0.98);
}
.btn-outline {
  background: transparent;
  color: var(--accent);
  border: 1px solid var(--accent);
}
.btn-outline:hover {
  background: rgba(0,229,255,0.12);
  box-shadow: 0 0 20px rgba(0,229,255,0.25);
  transform: translateY(-2px);
}
.btn-lg {
  min-height: 52px;
  padding: 0 36px;
  font-size: 16px;
}
.btn-block {
  width: 100%;
}
/* ===== 标签 / 徽章 ===== */
.badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 16px;
  border-radius: 999px;
  font-size: 13px;
  font-weight: 500;
  background: rgba(0,229,255,0.08);
  border: 1px solid rgba(0,229,255,0.25);
  color: var(--accent);
}
.badge .dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--accent);
  animation: pulse 2s ease-in-out infinite;
}
@keyframes pulse {
  0%, 100% { opacity: 1; box-shadow: 0 0 0 0 rgba(0,229,255,0.5); }
  50% { opacity: 0.6; box-shadow: 0 0 0 6px rgba(0,229,255,0); }
}
.tag {
  display: inline-block;
  padding: 4px 14px;
  border-radius: 999px;
  font-size: 12px;
  font-weight: 600;
  background: rgba(245,196,81,0.14);
  color: var(--accent-gold);
  border: 1px solid rgba(245,196,81,0.24);
}
/* ===== 顶部导航 ===== */
.site-header {
  position: fixed;
  top: 0; left: 0; right: 0;
  height: 72px;
  z-index: 1000;
  background: rgba(10,13,20,0.92);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid rgba(0,229,255,0.2);
}
.site-header::after {
  content: '';
  position: absolute;
  bottom: -1px; left: 0; right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(0,229,255,0.5), rgba(255,45,149,0.5), transparent);
  pointer-events: none;
}
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
  gap: 24px;
}
.logo {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-shrink: 0;
}
.logo-icon {
  width: 38px;
  height: 38px;
  flex-shrink: 0;
}
.logo-text {
  font-size: 20px;
  font-weight: 800;
  letter-spacing: 0.5px;
  background: linear-gradient(135deg, var(--accent) 0%, #5ddcff 50%, var(--accent-pink) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  white-space: nowrap;
}
.main-nav {
  display: flex;
  align-items: center;
  gap: 6px;
  margin-left: auto;
}
.nav-link {
  position: relative;
  display: inline-flex;
  align-items: center;
  padding: 10px 18px;
  border-radius: 8px;
  font-size: 15px;
  font-weight: 500;
  color: var(--text-secondary);
  transition: var(--transition);
}
.nav-link::after {
  content: '';
  position: absolute;
  bottom: 2px; left: 16px; right: 16px;
  height: 2px;
  border-radius: 2px;
  background: linear-gradient(90deg, var(--accent), var(--accent-pink));
  transform: scaleX(0);
  transform-origin: center;
  transition: transform 0.3s ease;
}
.nav-link:hover {
  color: var(--accent);
  text-shadow: 0 0 12px rgba(0,229,255,0.45);
}
.nav-link:hover::after { transform: scaleX(1); }
.nav-link.active {
  color: var(--accent);
  background: rgba(0,229,255,0.08);
  text-shadow: 0 0 12px rgba(0,229,255,0.45);
}
.nav-link.active::after { transform: scaleX(1); }
.header-cta {
  margin-left: 16px;
}
.hamburger {
  display: none;
  width: 44px;
  height: 44px;
  align-items: center;
  justify-content: center;
  border-radius: 10px;
  border: 1px solid var(--border);
  background: rgba(255,255,255,0.04);
  transition: var(--transition);
}
.hamburger:hover { border-color: var(--accent); }
.hamburger svg { width: 22px; height: 22px; stroke: var(--text-primary); }
/* ===== Hero ===== */
.hero {
  position: relative;
  min-height: calc(100vh - 72px);
  display: flex;
  align-items: center;
  padding-top: 72px;
  background:
    linear-gradient(90deg, rgba(10,13,20,0.96) 0%, rgba(10,13,20,0.78) 45%, rgba(10,13,20,0.35) 100%),
    url('/assets/images/backpic/back-1.png') center/cover no-repeat;
  overflow: hidden;
}
.hero::before {
  content: '';
  position: absolute;
  top: -120px; right: -80px;
  width: 420px; height: 420px;
  background: radial-gradient(circle, rgba(0,229,255,0.15) 0%, transparent 70%);
  pointer-events: none;
}
.hero::after {
  content: '';
  position: absolute;
  bottom: -120px; left: 30%;
  width: 360px; height: 360px;
  background: radial-gradient(circle, rgba(255,45,149,0.12) 0%, transparent 70%);
  pointer-events: none;
}
.hero-inner {
  width: 100%;
  max-width: 680px;
  margin-left: 0;
  padding-top: 40px;
  padding-bottom: 60px;
  position: relative;
  z-index: 2;
}
.hero .badge {
  margin-bottom: 28px;
}
.hero h1 {
  font-size: clamp(42px, 6vw, 64px);
  font-weight: 800;
  line-height: 1.15;
  letter-spacing: -0.5px;
  margin-bottom: 24px;
}
.hero h1 .highlight {
  background: linear-gradient(135deg, var(--accent) 0%, #5ddcff 50%, var(--accent-pink) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.hero-sub {
  font-size: 18px;
  line-height: 1.7;
  color: var(--text-secondary);
  margin-bottom: 36px;
  max-width: 560px;
}
.hero-actions {
  display: flex;
  gap: 16px;
  margin-bottom: 48px;
  flex-wrap: wrap;
}
.hero-stats-card {
  display: inline-flex;
  gap: 32px;
  padding: 24px 32px;
  background: rgba(21,28,44,0.85);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  backdrop-filter: blur(8px);
  box-shadow: var(--shadow-card);
  animation: float 6s ease-in-out infinite;
}
@keyframes float {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-8px); }
}
.hero-stats-card .stat-item {
  display: flex;
  flex-direction: column;
  gap: 4px;
  min-width: 90px;
}
.hero-stats-card .stat-num {
  font-family: var(--font-mono);
  font-size: 24px;
  font-weight: 700;
  color: var(--accent);
  text-shadow: 0 0 16px var(--glow-cyan);
}
.hero-stats-card .stat-label {
  font-size: 12px;
  color: var(--text-muted);
}
/* ===== 指标看板 ===== */
.metrics {
  background: var(--bg-secondary);
  padding: clamp(64px, 8vw, 96px) 0;
  border-top: 1px solid rgba(255,255,255,0.04);
  border-bottom: 1px solid rgba(255,255,255,0.04);
}
.metrics-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}
.metric-card {
  position: relative;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 32px 28px;
  transition: var(--transition);
  overflow: hidden;
}
.metric-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0;
  width: 100%; height: 3px;
  background: linear-gradient(90deg, var(--accent), transparent);
  opacity: 0.6;
}
.metric-card:hover {
  transform: translateY(-4px);
  border-color: rgba(0,229,255,0.35);
  box-shadow: 0 12px 40px rgba(0,0,0,0.5), 0 0 24px rgba(0,229,255,0.12);
}
.metric-tag {
  display: inline-block;
  font-size: 12px;
  font-weight: 600;
  color: var(--accent-gold);
  margin-bottom: 16px;
  letter-spacing: 1px;
}
.metric-value {
  font-family: var(--font-mono);
  font-size: clamp(36px, 5vw, 52px);
  font-weight: 700;
  line-height: 1;
  color: var(--accent);
  text-shadow: 0 0 20px var(--glow-cyan);
  margin-bottom: 10px;
}
.metric-unit {
  font-size: 0.5em;
  color: var(--text-secondary);
  margin-left: 2px;
}
.metric-label {
  font-size: 14px;
  color: var(--text-secondary);
}
/* ===== 服务矩阵 Bento ===== */
.services {
  padding: clamp(64px, 8vw, 96px) 0;
}
.bento-grid {
  display: grid;
  grid-template-columns: repeat(12, 1fr);
  grid-auto-rows: minmax(110px, auto);
  gap: 24px;
}
.bento-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: var(--transition);
}
.bento-card:hover {
  transform: translateY(-4px);
  border-color: rgba(0,229,255,0.3);
  box-shadow: 0 12px 36px rgba(0,0,0,0.5), 0 0 28px rgba(0,229,255,0.1);
}
.bento-large {
  grid-column: span 8;
  grid-row: span 2;
  display: flex;
  flex-direction: column;
}
.bento-large .bento-cover {
  width: 100%;
  height: 200px;
  object-fit: cover;
  transition: transform 0.5s ease;
}
.bento-large:hover .bento-cover { transform: scale(1.02); }
.bento-content {
  padding: 28px 30px;
  display: flex;
  flex-direction: column;
  flex: 1;
}
.bento-content h3 {
  font-size: clamp(20px, 2vw, 24px);
  font-weight: 700;
  margin-bottom: 10px;
}
.bento-content > p {
  font-size: 15px;
  color: var(--text-secondary);
  line-height: 1.7;
  margin-bottom: 18px;
}
.bento-content ul {
  margin-bottom: 18px;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px 16px;
}
.bento-content ul li {
  position: relative;
  font-size: 14px;
  color: var(--text-secondary);
  padding-left: 20px;
}
.bento-content ul li::before {
  content: '✓';
  position: absolute;
  left: 0;
  color: var(--accent);
  font-weight: 700;
}
.text-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 14px;
  font-weight: 600;
  color: var(--accent);
  margin-top: auto;
}
.text-link:hover { gap: 10px; color: #5ddcff; }
.bento-small {
  grid-column: span 4;
  padding: 28px 24px;
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.bento-small .bento-icon {
  width: 48px;
  height: 48px;
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(0,229,255,0.08);
  border: 1px solid rgba(0,229,255,0.18);
  margin-bottom: 6px;
}
.bento-small .bento-icon svg {
  width: 24px;
  height: 24px;
  stroke: var(--accent);
  fill: none;
  stroke-width: 1.8;
  stroke-linecap: round;
  stroke-linejoin: round;
}
.bento-small h3 {
  font-size: 18px;
  font-weight: 700;
}
.bento-small p {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.5;
  flex: 1;
}
.bento-small .text-link {
  font-size: 13px;
  margin-top: 12px;
}
/* ===== 结果对比 ===== */
.comparison {
  padding: clamp(64px, 8vw, 96px) 0;
  background: var(--bg-secondary);
  border-top: 1px solid rgba(255,255,255,0.04);
  border-bottom: 1px solid rgba(255,255,255,0.04);
}
.comparison-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 32px;
  margin-bottom: 40px;
}
.comparison-col {
  padding: 36px 32px;
  border-radius: var(--radius-lg);
  border: 1px solid var(--border);
  background: var(--bg-card);
}
.comparison-col.traditional { border-color: var(--border); }
.comparison-col.platform {
  border-color: rgba(0,229,255,0.4);
  box-shadow: 0 0 30px rgba(0,229,255,0.08), var(--shadow-card);
}
.comparison-col h3 {
  font-size: 20px;
  font-weight: 700;
  margin-bottom: 24px;
  padding-bottom: 14px;
  border-bottom: 1px solid var(--border);
}
.comparison-col.platform h3 { color: var(--accent); }
.comparison-col .item {
  display: flex;
  gap: 14px;
  padding: 14px 0;
  border-bottom: 1px solid rgba(255,255,255,0.04);
}
.comparison-col .item:last-child { border-bottom: none; }
.comparison-col .icon-x, .comparison-col .icon-check {
  flex-shrink: 0;
  width: 24px;
  height: 24px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 13px;
  font-weight: 700;
  margin-top: 2px;
}
.comparison-col .icon-x {
  background: rgba(255,255,255,0.06);
  color: #888f9e;
}
.comparison-col .icon-check {
  background: rgba(0,229,255,0.15);
  color: var(--accent);
  box-shadow: 0 0 10px rgba(0,229,255,0.3);
}
.comparison-col .item strong {
  display: block;
  font-size: 15px;
  font-weight: 600;
  margin-bottom: 2px;
}
.comparison-col .item p {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.5;
}
.efficiency-bar {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 28px 32px;
}
.bar-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 14px;
  font-size: 15px;
  color: var(--text-secondary);
}
.bar-value {
  font-family: var(--font-mono);
  font-size: 20px;
  font-weight: 700;
  color: var(--accent);
  text-shadow: 0 0 12px var(--glow-cyan);
}
.bar-track {
  height: 10px;
  border-radius: 999px;
  background: rgba(255,255,255,0.06);
  overflow: hidden;
}
.bar-fill {
  height: 100%;
  border-radius: 999px;
  background: linear-gradient(90deg, var(--accent), var(--accent-pink));
  box-shadow: 0 0 12px rgba(0,229,255,0.4);
  transition: width 1.2s ease;
}
/* ===== 资讯列表 ===== */
.news {
  padding: clamp(64px, 8vw, 96px) 0;
}
.news-list {
  display: flex;
  flex-direction: column;
  gap: 20px;
  max-width: 960px;
  margin: 0 auto;
}
.news-card {
  display: flex;
  gap: 24px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 20px;
  transition: var(--transition);
  align-items: flex-start;
}
.news-card:hover {
  transform: translateY(-3px);
  border-color: rgba(0,229,255,0.3);
  box-shadow: 0 10px 32px rgba(0,0,0,0.4), 0 0 20px rgba(0,229,255,0.08);
}
.news-thumb {
  flex-shrink: 0;
  width: 120px;
  height: 84px;
  border-radius: var(--radius-sm);
  overflow: hidden;
  background: var(--bg-secondary);
}
.news-thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.4s ease;
}
.news-card:hover .news-thumb img { transform: scale(1.05); }
.news-body {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 6px;
}
.news-body h3 {
  font-size: 18px;
  font-weight: 650;
  line-height: 1.4;
  overflow: hidden;
  display: -webkit-box;
  -webkit-line-clamp: 1;
  -webkit-box-orient: vertical;
}
.news-body p {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.6;
  overflow: hidden;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
}
.news-meta {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-top: auto;
}
.news-date {
  font-size: 13px;
  color: var(--text-muted);
}
.news-link {
  font-size: 13px;
  font-weight: 600;
  color: var(--accent);
  display: inline-flex;
  align-items: center;
  gap: 4px;
  transition: gap 0.2s ease;
}
.news-card:hover .news-link { gap: 8px; }
.empty-state {
  border: 2px dashed rgba(255,255,255,0.14);
  border-radius: var(--radius-lg);
  padding: 48px 24px;
  text-align: center;
  color: var(--text-muted);
}
.empty-state svg {
  width: 48px;
  height: 48px;
  stroke: var(--text-muted);
  fill: none;
  stroke-width: 1.5;
  margin-bottom: 16px;
}
.empty-state p { font-size: 15px; }
/* ===== FAQ ===== */
.faq {
  padding: clamp(64px, 8vw, 96px) 0;
  background: var(--bg-secondary);
}
.faq-list {
  max-width: 800px;
  margin: 0 auto;
}
.faq-item {
  border-bottom: 1px solid var(--border);
  position: relative;
  transition: background 0.3s ease;
}
.faq-item.active {
  background: rgba(0,229,255,0.04);
}
.faq-item.active::before {
  content: '';
  position: absolute;
  left: -8px; top: 0;
  width: 3px; height: 100%;
  background: var(--accent);
  border-radius: 3px;
  box-shadow: 0 0 12px var(--glow-cyan);
}
.faq-question {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  min-height: 56px;
  padding: 16px 8px;
  font-size: 17px;
  font-weight: 600;
  color: var(--text-primary);
  text-align: left;
  gap: 20px;
  transition: color 0.3s ease;
}
.faq-question:hover { color: var(--accent); }
.faq-icon {
  flex-shrink: 0;
  width: 28px;
  height: 28px;
  border-radius: 50%;
  border: 1.5px solid var(--text-muted);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
  color: var(--text-muted);
  transition: all 0.3s ease;
  position: relative;
}
.faq-icon::before {
  content: '+';
  line-height: 1;
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  transition: transform 0.3s ease;
}
.faq-item.active .faq-icon {
  border-color: var(--accent);
  color: var(--accent);
  transform: rotate(45deg);
  box-shadow: 0 0 12px rgba(0,229,255,0.3);
}
.faq-answer {
  max-height: 0;
  opacity: 0;
  overflow: hidden;
  transition: max-height 0.4s ease, opacity 0.3s ease, padding 0.3s ease;
  padding: 0 8px;
}
.faq-item.active .faq-answer {
  max-height: 300px;
  opacity: 1;
  padding: 0 8px 24px;
}
.faq-answer p {
  font-size: 15px;
  line-height: 1.7;
  color: var(--text-secondary);
}
/* ===== 转化表单 ===== */
.contact {
  padding: clamp(64px, 8vw, 96px) 0;
}
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  align-items: start;
}
.contact-info h2 {
  font-size: clamp(30px, 4vw, 38px);
  font-weight: 700;
  line-height: 1.25;
  margin-bottom: 20px;
}
.contact-info > p {
  font-size: 16px;
  color: var(--text-secondary);
  line-height: 1.7;
  margin-bottom: 32px;
}
.contact-methods {
  display: flex;
  flex-direction: column;
  gap: 20px;
}
.method {
  display: flex;
  align-items: flex-start;
  gap: 14px;
}
.method-icon {
  width: 44px;
  height: 44px;
  border-radius: 12px;
  background: rgba(0,229,255,0.08);
  border: 1px solid rgba(0,229,255,0.2);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}
.method-icon svg {
  width: 20px;
  height: 20px;
  stroke: var(--accent);
  fill: none;
  stroke-width: 2;
  stroke-linecap: round;
  stroke-linejoin: round;
}
.method-label {
  font-size: 13px;
  color: var(--text-muted);
  margin-bottom: 2px;
}
.method-value {
  font-size: 15px;
  font-weight: 500;
  color: var(--text-primary);
}
.contact-form {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 36px;
  box-shadow: var(--shadow-card);
}
.form-group {
  margin-bottom: 20px;
}
.form-group label {
  display: block;
  font-size: 14px;
  color: var(--text-secondary);
  margin-bottom: 8px;
  font-weight: 500;
}
.form-group input,
.form-group select,
.form-group textarea {
  width: 100%;
  min-height: 46px;
  padding: 10px 16px;
  background: #0f1524;
  border: 1px solid rgba(255,255,255,0.12);
  border-radius: var(--radius-sm);
  color: var(--text-primary);
  transition: all 0.3s ease;
}
.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(0,229,255,0.2);
}
.form-group textarea {
  min-height: 100px;
  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 d='M1 1l5 5 5-5' stroke='%23a6b0c3' stroke-width='1.5' fill='none' stroke-linecap='round'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 16px center;
  padding-right: 40px;
}
.form-group input::placeholder,
.form-group textarea::placeholder {
  color: #5a6474;
}
.form-submit {
  margin-top: 8px;
}
.form-success {
  display: none;
  padding: 12px 16px;
  border-radius: var(--radius-sm);
  background: rgba(34,197,94,0.1);
  border: 1px solid rgba(34,197,94,0.3);
  color: #4ade80;
  font-size: 14px;
  margin-bottom: 16px;
}
.form-error {
  display: none;
  padding: 12px 16px;
  border-radius: var(--radius-sm);
  background: rgba(239,68,68,0.1);
  border: 1px solid rgba(239,68,68,0.3);
  color: #f87171;
  font-size: 14px;
  margin-bottom: 16px;
}
/* ===== 页脚 ===== */
.site-footer {
  background: var(--bg-dark);
  border-top: 1px solid rgba(0,229,255,0.15);
  padding-top: 64px;
  position: relative;
}
.site-footer::before {
  content: '';
  position: absolute;
  top: -1px; left: 0; right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--accent), var(--accent-pink), transparent);
}
.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1.2fr;
  gap: 40px;
  padding-bottom: 48px;
}
.footer-brand .logo-text {
  font-size: 22px;
  margin-bottom: 16px;
}
.footer-brand > p {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.7;
  max-width: 320px;
}
.footer-col h4 {
  font-size: 15px;
  font-weight: 700;
  margin-bottom: 20px;
  color: var(--text-primary);
  position: relative;
  padding-bottom: 10px;
}
.footer-col h4::after {
  content: '';
  position: absolute;
  bottom: 0; left: 0;
  width: 24px; height: 2px;
  background: var(--accent);
  border-radius: 2px;
}
.footer-col ul {
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.footer-col a {
  font-size: 14px;
  color: var(--text-secondary);
  transition: var(--transition);
}
.footer-col a:hover {
  color: var(--accent);
  padding-left: 4px;
}
.footer-contact-info {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 2;
}
.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.06);
  padding: 24px 0;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
  font-size: 13px;
  color: var(--text-muted);
}
/* ===== 响应式 ===== */
@media (max-width: 1200px) {
  .container { padding: 0 20px; }
}
@media (max-width: 1024px) {
  .hero h1 { font-size: 40px; }
  .metrics-grid { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: 1fr 1fr; gap: 32px; }
}
@media (max-width: 768px) {
  .main-nav {
    position: fixed;
    top: 72px;
    left: 0; right: 0;
    background: rgba(10,13,20,0.98);
    flex-direction: column;
    align-items: stretch;
    padding: 24px;
    gap: 8px;
    transform: translateY(-120%);
    transition: transform 0.4s ease;
    border-bottom: 1px solid rgba(0,229,255,0.2);
    z-index: 999;
    backdrop-filter: blur(14px);
  }
  .main-nav.open {
    transform: translateY(0);
  }
  .nav-link {
    padding: 14px 16px;
    font-size: 18px;
    justify-content: center;
  }
  .header-cta { display: none; }
  .hamburger { display: flex; }
  .hero { padding-top: 72px; }
  .hero h1 { font-size: 36px; }
  .hero-sub { font-size: 16px; }
  .hero-actions { flex-direction: column; align-items: stretch; }
  .hero-actions .btn { width: 100%; }
  .hero-stats-card {
    flex-wrap: wrap;
    gap: 20px;
    padding: 20px;
    width: 100%;
  }
  .metrics-grid { grid-template-columns: repeat(2, 1fr); gap: 16px; }
  .bento-large { grid-column: span 12; }
  .bento-small { grid-column: span 6; }
  .comparison-grid { grid-template-columns: 1fr; }
  .contact-grid { grid-template-columns: 1fr; gap: 32px; }
  .news-card { flex-direction: column; }
  .news-thumb { width: 100%; height: 180px; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .footer-bottom { flex-direction: column; text-align: center; }
}
@media (max-width: 520px) {
  .container { padding: 0 16px; }
  .metrics-grid { grid-template-columns: 1fr; }
  .bento-small { grid-column: span 12; }
  .bento-content ul { grid-template-columns: 1fr; }
  .comparison-col { padding: 24px 20px; }
  .contact-form { padding: 24px 20px; }
  .footer-grid { grid-template-columns: 1fr; gap: 32px; }
  .hero-actions .btn { font-size: 15px; padding: 0 20px; }
  .logo-text { font-size: 18px; }
}

/* roulang page: category1 */
:root{
  --bg-primary:#0a0d14;
  --bg-secondary:#0e1320;
  --bg-card:#151c2c;
  --bg-card-hover:#1b2438;
  --accent-cyan:#00e5ff;
  --accent-cyan-dark:#0891b2;
  --accent-pink:#ff2d95;
  --accent-gold:#f5c451;
  --text-primary:#f2f6ff;
  --text-secondary:#a6b0c3;
  --text-muted:#6b7688;
  --border:rgba(255,255,255,0.08);
  --glow-cyan:rgba(0,229,255,0.55);
  --glow-pink:rgba(255,45,149,0.45);
  --radius-lg:20px;
  --radius-md:14px;
  --radius-sm:10px;
  --shadow-card:0 8px 30px rgba(0,0,0,0.45);
  --transition:all 0.3s ease;
}
*,*::before,*::after{
  box-sizing:border-box;
  margin:0;
  padding:0;
}
html{
  scroll-behavior:smooth;
}
body{
  font-family:-apple-system,"PingFang SC","Microsoft YaHei","HarmonyOS Sans SC","Noto Sans CJK SC",sans-serif;
  background:var(--bg-primary);
  color:var(--text-primary);
  line-height:1.6;
  font-size:16px;
  -webkit-font-smoothing:antialiased;
}
a{
  text-decoration:none;
  color:inherit;
  transition:var(--transition);
}
img{
  max-width:100%;
  display:block;
}
ul,ol{
  list-style:none;
}
button,input,select,textarea{
  font-family:inherit;
  font-size:inherit;
  border:none;
  outline:none;
}
.container{
  max-width:1200px;
  margin:0 auto;
  padding:0 24px;
}
.section{
  padding:clamp(64px,8vw,96px) 0;
}
.section-head{
  margin-bottom:48px;
  display:flex;
  align-items:flex-end;
  justify-content:space-between;
  gap:24px;
  flex-wrap:wrap;
}
.section-title{
  font-size:clamp(30px,4vw,38px);
  font-weight:700;
  line-height:1.3;
  color:var(--text-primary);
  position:relative;
  padding-left:18px;
}
.section-title::before{
  content:"";
  position:absolute;
  left:0;
  top:6px;
  bottom:6px;
  width:4px;
  border-radius:2px;
  background:linear-gradient(180deg,var(--accent-cyan),var(--accent-pink));
  box-shadow:0 0 14px var(--glow-cyan);
}
.section-subtitle{
  color:var(--text-secondary);
  font-size:17px;
  max-width:640px;
  line-height:1.7;
  margin-top:14px;
}
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  min-height:44px;
  padding:0 28px;
  border-radius:var(--radius-sm);
  font-size:16px;
  font-weight:600;
  cursor:pointer;
  transition:var(--transition);
  border:1px solid transparent;
  white-space:nowrap;
}
.btn-primary{
  background:linear-gradient(135deg,#00e5ff,#00c4d8);
  color:#0a1516;
  box-shadow:0 0 24px rgba(0,229,255,0.25);
}
.btn-primary:hover{
  box-shadow:0 0 36px rgba(0,229,255,0.45);
  transform:translateY(-2px);
}
.btn-primary:active{
  transform:translateY(0) scale(0.98);
}
.btn-outline{
  background:transparent;
  border-color:var(--accent-cyan);
  color:var(--accent-cyan);
}
.btn-outline:hover{
  background:rgba(0,229,255,0.15);
  box-shadow:0 0 24px rgba(0,229,255,0.2);
}
.btn-lg{
  min-height:52px;
  padding:0 36px;
  font-size:17px;
}
.btn-block{
  width:100%;
  height:48px;
}

/* Header */
.site-header{
  position:fixed;
  top:0;
  left:0;
  width:100%;
  height:72px;
  background:rgba(10,13,20,0.92);
  backdrop-filter:blur(12px);
  -webkit-backdrop-filter:blur(12px);
  z-index:1000;
  border-bottom:1px solid rgba(0,229,255,0.2);
  box-shadow:0 0 30px rgba(0,229,255,0.08);
}
.header-inner{
  display:flex;
  align-items:center;
  justify-content:space-between;
  height:72px;
  gap:24px;
}
.logo{
  display:flex;
  align-items:center;
  gap:10px;
  flex-shrink:0;
}
.logo-icon{
  width:36px;
  height:36px;
  border-radius:10px;
  background:linear-gradient(135deg,var(--accent-cyan),var(--accent-pink));
  display:flex;
  align-items:center;
  justify-content:center;
  font-weight:800;
  font-size:18px;
  color:#fff;
  box-shadow:0 0 18px rgba(0,229,255,0.35);
}
.logo-text{
  font-size:20px;
  font-weight:800;
  letter-spacing:0.5px;
  background:linear-gradient(90deg,#00e5ff,#ff2d95);
  -webkit-background-clip:text;
  background-clip:text;
  -webkit-text-fill-color:transparent;
}
.main-nav{
  display:flex;
  align-items:center;
  gap:6px;
  margin-left:auto;
}
.nav-link{
  position:relative;
  padding:10px 18px;
  color:var(--text-secondary);
  font-size:15px;
  font-weight:500;
  border-radius:8px;
  transition:var(--transition);
}
.nav-link:hover{
  color:var(--accent-cyan);
  text-shadow:0 0 12px var(--glow-cyan);
}
.nav-link.active{
  color:var(--text-primary);
  background:rgba(0,229,255,0.08);
  text-shadow:0 0 12px var(--glow-cyan);
}
.nav-link.active::after{
  content:"";
  position:absolute;
  bottom:2px;
  left:18px;
  right:18px;
  height:2px;
  border-radius:1px;
  background:var(--accent-cyan);
  box-shadow:0 0 10px var(--glow-cyan);
}
.nav-cta{
  margin-left:16px;
  min-height:40px;
  padding:0 22px;
  font-size:14px;
  flex-shrink:0;
}
.nav-toggle{
  display:none;
  width:44px;
  height:44px;
  background:transparent;
  cursor:pointer;
  flex-direction:column;
  align-items:center;
  justify-content:center;
  gap:5px;
  border-radius:10px;
  border:1px solid var(--border);
}
.nav-toggle span{
  display:block;
  width:20px;
  height:2px;
  background:var(--text-primary);
  border-radius:2px;
  transition:var(--transition);
}
.nav-toggle.active span:nth-child(1){
  transform:translateY(7px) rotate(45deg);
}
.nav-toggle.active span:nth-child(2){
  opacity:0;
}
.nav-toggle.active span:nth-child(3){
  transform:translateY(-7px) rotate(-45deg);
}

/* Hero */
.hero{
  position:relative;
  min-height:calc(100vh - 72px);
  padding:clamp(80px,10vw,120px) 0 80px;
  display:flex;
  align-items:center;
  overflow:hidden;
  background-image:url('/assets/images/backpic/back-1.png');
  background-size:cover;
  background-position:center;
}
.hero-overlay{
  position:absolute;
  inset:0;
  background:linear-gradient(90deg,rgba(10,13,20,0.96) 0%,rgba(10,13,20,0.82) 45%,rgba(10,13,20,0.35) 100%);
}
.hero-overlay::after{
  content:"";
  position:absolute;
  top:-20%;
  right:-10%;
  width:520px;
  height:520px;
  border-radius:50%;
  background:radial-gradient(circle,rgba(0,229,255,0.14),transparent 70%);
  pointer-events:none;
}
.hero-inner{
  position:relative;
  z-index:2;
  display:grid;
  grid-template-columns:1.2fr 0.8fr;
  gap:60px;
  align-items:center;
}
.hero-badge{
  display:inline-flex;
  align-items:center;
  gap:8px;
  padding:7px 16px;
  border-radius:999px;
  background:rgba(0,229,255,0.1);
  border:1px solid rgba(0,229,255,0.3);
  font-size:13px;
  color:var(--accent-cyan);
  margin-bottom:22px;
}
.status-dot{
  width:8px;
  height:8px;
  border-radius:50%;
  background:#22e584;
  box-shadow:0 0 10px #22e584;
  animation:pulse 2s ease-in-out infinite;
}
@keyframes pulse{
  0%,100%{opacity:1;transform:scale(1);}
  50%{opacity:0.6;transform:scale(0.85);}
}
.hero h1{
  font-size:clamp(42px,6vw,64px);
  font-weight:800;
  line-height:1.15;
  letter-spacing:1px;
  color:var(--text-primary);
  margin-bottom:24px;
}
.grad-text{
  background:linear-gradient(90deg,#00e5ff,#ff2d95);
  -webkit-background-clip:text;
  background-clip:text;
  -webkit-text-fill-color:transparent;
}
.hero-sub{
  font-size:18px;
  color:var(--text-secondary);
  line-height:1.75;
  max-width:600px;
  margin-bottom:32px;
}
.hero-actions{
  display:flex;
  gap:16px;
  flex-wrap:wrap;
  margin-bottom:44px;
}
.hero-metrics{
  display:flex;
  gap:32px;
  flex-wrap:wrap;
}
.hero-metric{
  display:flex;
  flex-direction:column;
  gap:2px;
}
.hero-metric strong{
  font-family:"SF Mono","JetBrains Mono",ui-monospace,Menlo,Consolas,monospace;
  font-size:26px;
  font-weight:600;
  color:var(--accent-cyan);
  text-shadow:0 0 18px var(--glow-cyan);
}
.hero-metric span{
  font-size:13px;
  color:var(--text-muted);
}
.hero-visual{
  position:relative;
}
.hero-panel{
  position:relative;
  border-radius:var(--radius-lg);
  border:1px solid rgba(0,229,255,0.25);
  box-shadow:0 0 50px rgba(0,229,255,0.12),var(--shadow-card);
  overflow:hidden;
  background:var(--bg-secondary);
}
.hero-panel img{
  width:100%;
  height:auto;
  object-fit:cover;
}
.panel-badge{
  position:absolute;
  top:16px;
  right:16px;
  padding:6px 14px;
  background:rgba(10,13,20,0.85);
  border:1px solid rgba(0,229,255,0.35);
  border-radius:999px;
  font-size:12px;
  color:var(--accent-cyan);
  box-shadow:0 0 18px rgba(0,229,255,0.2);
}
.panel-caption{
  position:absolute;
  left:16px;
  bottom:16px;
  padding:14px 20px;
  background:rgba(10,13,20,0.88);
  border:1px solid var(--border);
  border-radius:var(--radius-sm);
  backdrop-filter:blur(8px);
}
.panel-caption strong{
  display:block;
  font-size:14px;
  color:var(--text-primary);
  margin-bottom:2px;
}
.panel-caption span{
  font-size:12px;
  color:var(--text-muted);
}

/* Metrics */
.metrics-section{
  background:var(--bg-secondary);
  border-top:1px solid var(--border);
}
.metrics-grid{
  display:grid;
  grid-template-columns:repeat(4,1fr);
  gap:24px;
}
.metric-card{
  background:var(--bg-card);
  border:1px solid var(--border);
  border-radius:var(--radius-lg);
  padding:28px 26px;
  position:relative;
  transition:var(--transition);
  overflow:hidden;
}
.metric-card::before{
  content:"";
  position:absolute;
  top:0;
  left:0;
  right:0;
  height:3px;
  background:linear-gradient(90deg,var(--accent-cyan),transparent);
  opacity:0.6;
}
.metric-card:hover{
  border-color:rgba(0,229,255,0.4);
  box-shadow:0 0 28px rgba(0,229,255,0.12);
  transform:translateY(-4px);
}
.metric-tag{
  display:inline-block;
  font-size:12px;
  color:var(--accent-gold);
  background:rgba(245,196,81,0.12);
  border:1px solid rgba(245,196,81,0.25);
  border-radius:999px;
  padding:3px 12px;
  margin-bottom:16px;
}
.metric-value{
  font-family:"SF Mono","JetBrains Mono",ui-monospace,Menlo,Consolas,monospace;
  font-size:clamp(36px,5vw,52px);
  font-weight:600;
  color:var(--accent-cyan);
  text-shadow:0 0 24px var(--glow-cyan);
  line-height:1.1;
}
.metric-unit{
  font-size:16px;
  color:var(--text-muted);
  font-weight:400;
  margin-left:4px;
}
.metric-label{
  margin-top:10px;
  color:var(--text-secondary);
  font-size:15px;
}

/* Matrix */
.matrix-grid{
  display:grid;
  grid-template-columns:repeat(6,1fr);
  grid-template-areas:
    "main main main main sm1 sm1"
    "main main main main sm2 sm2"
    "sm3 sm3 main2 main2 main2 main2"
    "sm4 sm4 main2 main2 main2 main2";
  gap:24px;
}
.card-large{
  background:var(--bg-card);
  border:1px solid var(--border);
  border-radius:var(--radius-lg);
  overflow:hidden;
  transition:var(--transition);
  display:flex;
  flex-direction:column;
}
.card-large:hover{
  border-color:rgba(0,229,255,0.5);
  box-shadow:0 0 32px rgba(0,229,255,0.15);
  transform:translateY(-4px);
}
.card-large-img{
  position:relative;
  height:200px;
  overflow:hidden;
}
.card-large-img img{
  width:100%;
  height:100%;
  object-fit:cover;
}
.card-large-img::after{
  content:"";
  position:absolute;
  inset:0;
  background:linear-gradient(180deg,rgba(10,13,20,0.2),rgba(10,13,20,0.05));
}
.card-large-body{
  padding:clamp(20px,3vw,32px);
  flex:1;
  display:flex;
  flex-direction:column;
}
.card-large-body h3{
  font-size:clamp(22px,2vw,26px);
  font-weight:700;
  margin-bottom:12px;
  color:var(--text-primary);
}
.card-large-body p{
  color:var(--text-secondary);
  font-size:15px;
  line-height:1.7;
  margin-bottom:20px;
}
.feature-list{
  display:flex;
  flex-direction:column;
  gap:12px;
  margin-bottom:24px;
}
.feature-list li{
  display:flex;
  align-items:flex-start;
  gap:10px;
  color:var(--text-secondary);
  font-size:14px;
}
.feature-list li svg{
  flex-shrink:0;
  width:18px;
  height:18px;
  margin-top:2px;
  color:var(--accent-cyan);
}
.card-link{
  margin-top:auto;
  color:var(--accent-cyan);
  font-size:14px;
  font-weight:600;
  display:inline-flex;
  align-items:center;
  gap:6px;
}
.card-link:hover{
  gap:10px;
  text-shadow:0 0 12px var(--glow-cyan);
}
.card-small{
  background:var(--bg-card);
  border:1px solid var(--border);
  border-radius:var(--radius-md);
  padding:26px 22px;
  transition:var(--transition);
  display:flex;
  flex-direction:column;
  gap:12px;
  position:relative;
  overflow:hidden;
}
.card-small::before{
  content:"";
  position:absolute;
  top:0;
  left:0;
  right:0;
  height:2px;
  background:linear-gradient(90deg,var(--accent-cyan),transparent);
  opacity:0;
  transition:var(--transition);
}
.card-small:hover{
  border-color:rgba(0,229,255,0.45);
  box-shadow:0 0 24px rgba(0,229,255,0.12);
  transform:translateY(-4px);
}
.card-small:hover::before{
  opacity:1;
}
.card-small svg{
  width:28px;
  height:28px;
  stroke:var(--accent-cyan);
  fill:none;
  stroke-width:1.5;
}
.card-small h3{
  font-size:19px;
  font-weight:700;
  color:var(--text-primary);
}
.card-small p{
  color:var(--text-muted);
  font-size:14px;
  line-height:1.6;
}
.card-small .card-link{
  font-size:13px;
  margin-top:auto;
}
.matrix-a{grid-area:main;}
.matrix-b{grid-area:main2;}
.matrix-c1{grid-area:sm1;}
.matrix-c2{grid-area:sm2;}
.matrix-c3{grid-area:sm3;}
.matrix-c4{grid-area:sm4;}

/* Process */
.process-section{
  background:var(--bg-secondary);
  border-top:1px solid var(--border);
  border-bottom:1px solid var(--border);
}
.process-grid{
  display:grid;
  grid-template-columns:repeat(4,1fr);
  gap:24px;
  counter-reset:step;
}
.process-step{
  position:relative;
  background:var(--bg-card);
  border:1px solid var(--border);
  border-radius:var(--radius-lg);
  padding:36px 28px 30px;
  transition:var(--transition);
  counter-increment:step;
}
.process-step:hover{
  transform:translateY(-4px);
  border-color:rgba(255,45,149,0.4);
  box-shadow:0 0 28px rgba(255,45,149,0.12);
}
.process-step::before{
  content:counter(step,decimal-leading-zero);
  position:absolute;
  top:20px;
  right:22px;
  font-family:"SF Mono","JetBrains Mono",ui-monospace,Menlo,Consolas,monospace;
  font-size:34px;
  font-weight:600;
  color:rgba(255,255,255,0.06);
  transition:var(--transition);
}
.process-step:hover::before{
  color:rgba(0,229,255,0.25);
}
.step-icon{
  width:48px;
  height:48px;
  border-radius:12px;
  background:rgba(0,229,255,0.12);
  border:1px solid rgba(0,229,255,0.25);
  display:flex;
  align-items:center;
  justify-content:center;
  margin-bottom:20px;
  box-shadow:0 0 16px rgba(0,229,255,0.1);
}
.step-icon svg{
  width:24px;
  height:24px;
  stroke:var(--accent-cyan);
  fill:none;
  stroke-width:1.5;
}
.process-step h3{
  font-size:20px;
  font-weight:700;
  margin-bottom:10px;
  color:var(--text-primary);
}
.process-step p{
  color:var(--text-secondary);
  font-size:14px;
  line-height:1.7;
}

/* Compare */
.compare-grid{
  display:grid;
  grid-template-columns:1fr 1fr;
  gap:30px;
  align-items:stretch;
}
.compare-col{
  border-radius:var(--radius-lg);
  padding:clamp(24px,3vw,36px);
}
.compare-col-traditional{
  background:var(--bg-card);
  border:1px solid var(--border);
}
.compare-col-modern{
  background:rgba(0,229,255,0.04);
  border:1px solid rgba(0,229,255,0.45);
  box-shadow:0 0 36px rgba(0,229,255,0.12);
}
.compare-col h3{
  font-size:22px;
  font-weight:700;
  margin-bottom:28px;
  display:flex;
  align-items:center;
  gap:12px;
}
.compare-col-modern h3{
  color:var(--accent-cyan);
}
.compare-item{
  display:flex;
  gap:14px;
  padding:14px 0;
  border-bottom:1px solid rgba(255,255,255,0.04);
}
.compare-item:last-child{
  border-bottom:none;
}
.compare-check{
  flex-shrink:0;
  width:24px;
  height:24px;
  border-radius:50%;
  background:rgba(0,229,255,0.15);
  border:1px solid var(--accent-cyan);
  display:flex;
  align-items:center;
  justify-content:center;
  color:var(--accent-cyan);
}
.compare-check svg{
  width:14px;
  height:14px;
}
.compare-times{
  flex-shrink:0;
  width:24px;
  height:24px;
  border-radius:50%;
  background:rgba(255,255,255,0.05);
  border:1px solid var(--text-muted);
  display:flex;
  align-items:center;
  justify-content:center;
  color:var(--text-muted);
}
.compare-times svg{
  width:14px;
  height:14px;
}
.compare-item-text strong{
  display:block;
  font-size:15px;
  font-weight:600;
  color:var(--text-primary);
  line-height:1.4;
}
.compare-item-text span{
  font-size:13px;
  color:var(--text-muted);
  line-height:1.5;
  display:block;
  margin-top:3px;
}
.data-bar{
  margin-top:26px;
  grid-column:1/-1;
}
.data-bar-label{
  display:flex;
  justify-content:space-between;
  align-items:center;
  margin-bottom:8px;
  font-size:13px;
  color:var(--text-secondary);
}
.data-bar-track{
  height:10px;
  border-radius:999px;
  background:rgba(255,255,255,0.06);
  overflow:hidden;
}
.data-bar-fill{
  height:100%;
  width:86%;
  border-radius:999px;
  background:linear-gradient(90deg,var(--accent-cyan),var(--accent-pink));
  box-shadow:0 0 16px var(--glow-cyan);
  transition:width 1.2s ease;
}

/* Scenario */
.scenario-grid{
  display:grid;
  grid-template-columns:repeat(4,1fr);
  gap:24px;
}
.scenario-card{
  background:var(--bg-card);
  border:1px solid var(--border);
  border-radius:var(--radius-lg);
  overflow:hidden;
  transition:var(--transition);
}
.scenario-card:hover{
  transform:translateY(-4px);
  border-color:rgba(255,45,149,0.4);
  box-shadow:0 0 24px rgba(255,45,149,0.12);
}
.scenario-card img{
  height:120px;
  width:100%;
  object-fit:cover;
}
.scenario-card-body{
  padding:22px 20px;
}
.scenario-card-body h3{
  font-size:18px;
  font-weight:700;
  margin-bottom:8px;
  color:var(--text-primary);
}
.scenario-card-body p{
  font-size:14px;
  color:var(--text-muted);
  line-height:1.6;
}

/* FAQ */
.faq-section{
  background:var(--bg-secondary);
  border-top:1px solid var(--border);
  border-bottom:1px solid var(--border);
}
.faq-list{
  max-width:860px;
  margin:0 auto;
}
.faq-item{
  border-bottom:1px solid var(--border);
}
.faq-item:first-child{
  border-top:1px solid var(--border);
}
.faq-question{
  width:100%;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:16px;
  padding:0 24px;
  min-height:56px;
  background:transparent;
  color:var(--text-primary);
  font-size:16px;
  font-weight:600;
  cursor:pointer;
  text-align:left;
  transition:var(--transition);
}
.faq-question:hover{
  color:var(--accent-cyan);
}
.faq-icon{
  flex-shrink:0;
  width:24px;
  height:24px;
  border-radius:50%;
  border:1px solid var(--text-muted);
  display:flex;
  align-items:center;
  justify-content:center;
  color:var(--text-muted);
  transition:var(--transition);
  font-size:16px;
  line-height:1;
}
.faq-item.active .faq-icon{
  border-color:var(--accent-cyan);
  color:var(--accent-cyan);
  transform:rotate(45deg);
  box-shadow:0 0 12px rgba(0,229,255,0.25);
}
.faq-answer{
  max-height:0;
  overflow:hidden;
  opacity:0;
  transition:max-height 0.35s ease,opacity 0.35s ease,padding 0.35s ease;
  position:relative;
}
.faq-answer-inner{
  padding:0 24px 24px 56px;
  color:var(--text-secondary);
  font-size:15px;
  line-height:1.75;
}
.faq-item.active .faq-answer{
  max-height:500px;
  opacity:1;
  background:rgba(0,229,255,0.03);
}
.faq-item.active .faq-answer::before{
  content:"";
  position:absolute;
  left:0;
  top:0;
  bottom:0;
  width:3px;
  background:linear-gradient(180deg,var(--accent-cyan),var(--accent-pink));
  border-radius:2px;
}

/* Contact */
.contact-grid{
  display:grid;
  grid-template-columns:0.9fr 1.1fr;
  gap:48px;
  align-items:start;
}
.contact-info-card{
  background:var(--bg-card);
  border:1px solid var(--border);
  border-radius:var(--radius-lg);
  padding:clamp(24px,3vw,36px);
  position:relative;
  overflow:hidden;
}
.contact-info-card::before{
  content:"";
  position:absolute;
  top:0;
  left:0;
  right:0;
  height:3px;
  background:linear-gradient(90deg,var(--accent-cyan),var(--accent-pink));
}
.contact-info-card h3{
  font-size:24px;
  font-weight:700;
  margin-bottom:16px;
  color:var(--text-primary);
}
.contact-info-card p{
  color:var(--text-secondary);
  font-size:15px;
  line-height:1.8;
  margin-bottom:24px;
}
.contact-info-list{
  display:flex;
  flex-direction:column;
  gap:18px;
}
.contact-info-item{
  display:flex;
  align-items:flex-start;
  gap:14px;
}
.contact-info-item .info-icon{
  flex-shrink:0;
  width:40px;
  height:40px;
  border-radius:10px;
  background:rgba(0,229,255,0.12);
  border:1px solid rgba(0,229,255,0.2);
  display:flex;
  align-items:center;
  justify-content:center;
}
.contact-info-item .info-icon svg{
  width:20px;
  height:20px;
  stroke:var(--accent-cyan);
  fill:none;
  stroke-width:1.5;
}
.contact-info-item strong{
  display:block;
  font-size:14px;
  color:var(--text-muted);
  font-weight:400;
  margin-bottom:2px;
}
.contact-info-item span{
  font-size:16px;
  color:var(--text-primary);
  font-weight:600;
}
.contact-form-card{
  background:var(--bg-card);
  border:1px solid var(--border);
  border-radius:var(--radius-lg);
  padding:clamp(24px,3vw,36px);
}
.contact-form-card h3{
  font-size:24px;
  font-weight:700;
  margin-bottom:6px;
  color:var(--text-primary);
}
.contact-form-card .form-note{
  font-size:14px;
  color:var(--text-muted);
  margin-bottom:28px;
}
.form-group{
  margin-bottom:20px;
}
.form-group label{
  display:block;
  font-size:14px;
  color:var(--text-secondary);
  margin-bottom:8px;
  font-weight:500;
}
.form-group input,.form-group select,.form-group textarea{
  width:100%;
  min-height:46px;
  background:#0f1524;
  border:1px solid rgba(255,255,255,0.12);
  border-radius:10px;
  padding:12px 16px;
  color:var(--text-primary);
  font-size:15px;
  transition:var(--transition);
}
.form-group textarea{
  min-height:120px;
  resize:vertical;
}
.form-group input:focus,.form-group select:focus,.form-group textarea:focus{
  border-color:var(--accent-cyan);
  box-shadow:0 0 0 4px rgba(0,229,255,0.15);
}
.form-group select{
  appearance:none;
  -webkit-appearance:none;
  background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' viewBox='0 0 24 24' fill='none' stroke='%23a6b0c3' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='6 9 12 15 18 9'%3E%3C/polyline%3E%3C/svg%3E");
  background-repeat:no-repeat;
  background-position:right 16px center;
  padding-right:44px;
}
.form-group select option{
  background:var(--bg-secondary);
  color:var(--text-primary);
}

/* Footer */
.site-footer{
  background:#070a10;
  border-top:1px solid rgba(0,229,255,0.2);
  box-shadow:0 -1px 30px rgba(0,229,255,0.06);
}
.footer-grid{
  display:grid;
  grid-template-columns:1.4fr 1fr 1fr 1fr;
  gap:40px;
  padding:56px 0 40px;
}
.footer-brand .logo-text{
  font-size:22px;
  font-weight:800;
  background:linear-gradient(90deg,#00e5ff,#ff2d95);
  -webkit-background-clip:text;
  background-clip:text;
  -webkit-text-fill-color:transparent;
}
.footer-brand p{
  margin-top:16px;
  font-size:14px;
  color:var(--text-muted);
  line-height:1.75;
  max-width:320px;
}
.footer-col h4{
  font-size:16px;
  font-weight:700;
  color:var(--text-primary);
  margin-bottom:20px;
}
.footer-col ul{
  display:flex;
  flex-direction:column;
  gap:12px;
}
.footer-col ul a{
  font-size:14px;
  color:var(--text-muted);
  transition:var(--transition);
}
.footer-col ul a:hover{
  color:var(--accent-cyan);
  text-shadow:0 0 12px var(--glow-cyan);
}
.footer-contact-info{
  font-size:14px;
  color:var(--text-muted);
  line-height:2;
}
.footer-bottom{
  border-top:1px solid rgba(255,255,255,0.06);
  padding:24px 0;
  display:flex;
  justify-content:space-between;
  align-items:center;
  gap:12px;
  flex-wrap:wrap;
  font-size:13px;
  color:var(--text-muted);
}

/* Responsive */
@media screen and (max-width:1024px){
  .hero-inner{
    grid-template-columns:1fr;
    gap:48px;
  }
  .hero-visual{
    max-width:480px;
  }
  .metrics-grid{
    grid-template-columns:repeat(2,1fr);
  }
  .process-grid{
    grid-template-columns:repeat(2,1fr);
  }
  .scenario-grid{
    grid-template-columns:repeat(2,1fr);
  }
  .matrix-grid{
    grid-template-columns:repeat(2,1fr);
    grid-template-areas:
      "main main"
      "main main"
      "sm1 sm2"
      "sm3 sm4"
      "main2 main2"
      "main2 main2";
  }
  .footer-grid{
    grid-template-columns:1fr 1fr;
  }
}
@media screen and (max-width:768px){
  .main-nav{
    position:fixed;
    top:72px;
    left:0;
    right:0;
    background:rgba(10,13,20,0.97);
    flex-direction:column;
    align-items:flex-start;
    padding:24px;
    padding-left:28px;
    gap:12px;
    display:flex;
    transform:translateY(-120%);
    opacity:0;
    transition:transform 0.3s ease,opacity 0.3s ease;
    border-bottom:1px solid rgba(0,229,255,0.2);
    box-shadow:0 20px 40px rgba(0,0,0,0.5);
    margin-left:0;
    z-index:999;
  }
  .main-nav.open{
    transform:translateY(0);
    opacity:1;
  }
  .nav-link{
    font-size:20px;
    padding:14px 8px;
    width:100%;
  }
  .nav-link.active::after{
    left:8px;
    right:8px;
  }
  .nav-cta{
    display:none;
  }
  .nav-toggle{
    display:flex;
  }
  .compare-grid{
    grid-template-columns:1fr;
  }
  .contact-grid{
    grid-template-columns:1fr;
  }
  .section-head{
    flex-direction:column;
    align-items:flex-start;
  }
}
@media screen and (max-width:520px){
  .container{
    padding:0 16px;
  }
  .metrics-grid{
    grid-template-columns:1fr 1fr;
    gap:16px;
  }
  .metric-card{
    padding:20px 18px;
  }
  .process-grid{
    grid-template-columns:1fr;
  }
  .scenario-grid{
    grid-template-columns:1fr;
  }
  .matrix-grid{
    grid-template-columns:1fr;
    grid-template-areas:
      "main"
      "sm1"
      "sm2"
      "sm3"
      "sm4"
      "main2";
  }
  .footer-grid{
    grid-template-columns:1fr;
    gap:28px;
  }
  .hero-actions .btn{
    width:100%;
  }
  .hero-metrics{
    gap:20px;
  }
  .footer-bottom{
    flex-direction:column;
    text-align:center;
  }
  .btn-lg{
    min-height:48px;
    padding:0 24px;
  }
}

/* roulang page: article */
:root {
  --bg-primary: #0a0d14;
  --bg-secondary: #0b0f18;
  --bg-card: #151c2c;
  --bg-card-hover: #1b2438;
  --bg-input: #0f1524;
  --accent: #00e5ff;
  --accent-dim: #0891b2;
  --accent-pink: #ff2d95;
  --gold: #f5c451;
  --text-primary: #f2f6ff;
  --text-secondary: #a6b0c3;
  --text-muted: #6b7688;
  --border: rgba(255, 255, 255, 0.08);
  --shadow-card: 0 8px 30px rgba(0, 0, 0, 0.45);
  --glow-primary: rgba(0, 229, 255, 0.55);
  --glow-pink: rgba(255, 45, 149, 0.45);
  --radius-lg: 20px;
  --radius-md: 14px;
  --radius-btn: 10px;
  --container: 1200px;
}
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}
html {
  scroll-behavior: smooth;
}
body {
  background: var(--bg-primary);
  color: var(--text-primary);
  font-family: -apple-system, "PingFang SC", "Microsoft YaHei", "HarmonyOS Sans SC", "Noto Sans CJK SC", sans-serif;
  font-size: 16px;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}
img {
  max-width: 100%;
  display: block;
}
a {
  color: var(--accent);
  text-decoration: none;
}
a:focus-visible,
button:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}
button,
input,
select,
textarea {
  font-family: inherit;
}
.container {
  width: 100%;
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 24px;
}
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  height: 44px;
  padding: 0 24px;
  border-radius: var(--radius-btn);
  font-size: 15px;
  font-weight: 600;
  cursor: pointer;
  border: none;
  transition: all 0.25s ease;
  white-space: nowrap;
}
.btn-primary {
  background: linear-gradient(135deg, var(--accent), #00b7ff);
  color: #08131a;
}
.btn-primary:hover {
  box-shadow: 0 0 24px rgba(0, 229, 255, 0.45);
  transform: translateY(-2px);
}
.btn-primary:active {
  transform: translateY(0);
}
.btn-outline {
  background: transparent;
  border: 1px solid var(--accent);
  color: var(--text-primary);
}
.btn-outline:hover {
  background: rgba(0, 229, 255, 0.15);
  box-shadow: 0 0 14px rgba(0, 229, 255, 0.3);
}
.btn-outline:active {
  transform: translateY(0);
}
input,
select,
textarea {
  width: 100%;
  height: 46px;
  background: var(--bg-input);
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: var(--radius-btn);
  padding: 0 14px;
  color: var(--text-primary);
  font-size: 14px;
  transition: border-color 0.2s, box-shadow 0.2s;
}
textarea {
  height: 120px;
  padding: 12px 14px;
  resize: vertical;
}
input:focus,
select:focus,
textarea:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(0, 229, 255, 0.25);
  outline: none;
}
.main-header {
  position: sticky;
  top: 0;
  z-index: 100;
  height: 72px;
  background: rgba(10, 13, 20, 0.92);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid rgba(0, 229, 255, 0.2);
}
.header-inner {
  height: 72px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
}
.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  flex-shrink: 0;
}
.brand-mark {
  width: 38px;
  height: 38px;
  border-radius: 10px;
  background: linear-gradient(135deg, var(--accent), var(--accent-pink));
  display: flex;
  align-items: center;
  justify-content: center;
  color: #0a0d14;
  font-size: 18px;
  font-weight: 800;
  box-shadow: 0 0 18px rgba(0, 229, 255, 0.3);
}
.logo-text {
  color: var(--text-primary);
  font-size: 20px;
  font-weight: 800;
  letter-spacing: 0.02em;
}
.main-nav {
  display: flex;
  gap: 4px;
}
.nav-link {
  position: relative;
  padding: 8px 14px;
  border-radius: 8px;
  color: var(--text-secondary);
  font-size: 15px;
  font-weight: 500;
  transition: color 0.2s, background 0.2s, text-shadow 0.2s;
}
.nav-link:hover {
  color: var(--accent);
  background: rgba(0, 229, 255, 0.06);
  text-shadow: 0 0 12px rgba(0, 229, 255, 0.4);
}
.nav-link.active {
  color: var(--accent);
  background: rgba(0, 229, 255, 0.08);
}
.nav-link.active::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 14px;
  right: 14px;
  height: 2px;
  background: var(--accent);
  box-shadow: 0 0 10px var(--accent);
}
.nav-cta {
  margin-left: 8px;
}
.hamburger {
  display: none;
  width: 44px;
  height: 44px;
  padding: 10px;
  background: transparent;
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: 10px;
  cursor: pointer;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 5px;
}
.hamburger span {
  display: block;
  width: 20px;
  height: 2px;
  background: var(--text-primary);
  border-radius: 2px;
  transition: transform 0.3s, opacity 0.3s;
}
.hamburger.is-open span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}
.hamburger.is-open span:nth-child(2) {
  opacity: 0;
}
.hamburger.is-open span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}
.mobile-drawer {
  position: fixed;
  top: 72px;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(10, 13, 20, 0.98);
  display: flex;
  flex-direction: column;
  padding: 32px 24px;
  transform: translateX(100%);
  transition: transform 0.3s ease;
  z-index: 99;
}
.mobile-drawer.open {
  transform: translateX(0);
}
.mobile-drawer a {
  font-size: 24px;
  line-height: 1.6;
  color: var(--text-primary);
  padding: 14px 0;
  border-bottom: 1px solid var(--border);
  transition: color 0.2s;
}
.mobile-drawer a:hover,
.mobile-drawer a.active {
  color: var(--accent);
}
.mobile-drawer .drawer-cta {
  margin-top: 24px;
  text-align: center;
  background: linear-gradient(135deg, var(--accent), #00b7ff);
  color: #08131a;
  font-size: 18px;
  border-radius: 12px;
  padding: 14px 0;
  border: none;
}
.site-main {
  overflow: hidden;
}
.article-hero {
  position: relative;
  padding: 56px 0 42px;
  background: linear-gradient(90deg, rgba(10, 13, 20, 0.95) 0%, rgba(10, 13, 20, 0.78) 50%, rgba(10, 13, 20, 0.42) 100%), url('/assets/images/backpic/back-1.png') center / cover no-repeat;
  border-bottom: 1px solid rgba(0, 229, 255, 0.15);
}
.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  align-items: center;
  font-size: 14px;
  color: var(--text-muted);
}
.breadcrumb a {
  color: var(--text-muted);
  transition: color 0.2s;
}
.breadcrumb a:hover {
  color: var(--accent);
}
.breadcrumb .current {
  color: var(--text-secondary);
  max-width: 300px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.article-title-wrap {
  max-width: 900px;
  margin-top: 22px;
}
.article-title-wrap h1 {
  font-size: clamp(30px, 4.5vw, 46px);
  font-weight: 800;
  line-height: 1.25;
  letter-spacing: -0.01em;
  color: var(--text-primary);
  background: linear-gradient(135deg, #ffffff 0%, var(--accent) 100%);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}
.article-excerpt {
  margin-top: 18px;
  font-size: 16px;
  line-height: 1.8;
  color: var(--text-secondary);
  max-width: 820px;
}
.article-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 18px;
  align-items: center;
  margin-top: 22px;
  color: var(--text-muted);
  font-size: 14px;
}
.tag-category {
  padding: 4px 12px;
  background: rgba(245, 196, 81, 0.14);
  color: var(--gold);
  border-radius: 999px;
  font-size: 13px;
  font-weight: 600;
}
.read-count {
  color: var(--text-secondary);
  font-weight: 600;
}
.article-container {
  padding: 48px 24px 64px;
}
.article-layout {
  max-width: 760px;
  margin: 0 auto;
}
.article-body {
  font-size: 17px;
  line-height: 1.8;
  color: var(--text-secondary);
}
.article-body > * + * {
  margin-top: 20px;
}
.article-body h2 {
  font-size: 26px;
  font-weight: 700;
  color: var(--text-primary);
  margin-top: 36px;
  margin-bottom: 16px;
  padding-left: 14px;
  border-left: 3px solid var(--accent);
}
.article-body h3 {
  font-size: 21px;
  font-weight: 700;
  color: var(--text-primary);
  margin-top: 28px;
  margin-bottom: 12px;
}
.article-body h4 {
  font-size: 18px;
  font-weight: 600;
  color: var(--text-primary);
  margin-top: 22px;
  margin-bottom: 10px;
}
.article-body p {
  margin: 20px 0;
}
.article-body ul {
  margin: 20px 0;
  padding-left: 22px;
}
.article-body ol {
  margin: 20px 0;
  padding-left: 22px;
}
.article-body li {
  margin-bottom: 8px;
}
.article-body blockquote {
  margin: 28px 0;
  padding: 18px 22px;
  border-left: 3px solid var(--accent);
  background: rgba(0, 229, 255, 0.05);
  border-radius: 0 12px 12px 0;
  color: var(--text-primary);
}
.article-body img {
  max-width: 100%;
  border-radius: 12px;
  margin: 24px 0;
  border: 1px solid var(--border);
}
.article-body pre {
  background: #0f1524;
  padding: 18px;
  border-radius: 12px;
  overflow: auto;
  margin: 24px 0;
  border: 1px solid var(--border);
}
.article-body code {
  color: var(--accent);
  font-size: 14px;
}
.article-body a {
  color: var(--accent);
  border-bottom: 1px solid rgba(0, 229, 255, 0.3);
  transition: border-color 0.2s;
}
.article-body a:hover {
  border-color: var(--accent);
}
.post-pagination {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
  margin-top: 52px;
  padding-top: 32px;
  border-top: 1px solid var(--border);
}
.paginate-link {
  display: flex;
  flex-direction: column;
  gap: 8px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 20px;
  transition: transform 0.25s, border-color 0.25s, box-shadow 0.25s;
}
.paginate-link span {
  font-size: 13px;
  color: var(--text-muted);
}
.paginate-link strong {
  font-size: 16px;
  font-weight: 600;
  color: var(--text-primary);
}
.paginate-link:hover {
  border-color: var(--accent);
  transform: translateY(-2px);
  box-shadow: 0 0 18px rgba(0, 229, 255, 0.25);
}
.back-to-category {
  margin-top: 32px;
  text-align: center;
}
.back-to-category a {
  color: var(--text-secondary);
  font-size: 15px;
  transition: color 0.2s;
}
.back-to-category a:hover {
  color: var(--accent);
}
.empty-state {
  text-align: center;
  padding: 80px 24px;
  border: 1px dashed rgba(255, 255, 255, 0.2);
  border-radius: 16px;
  margin: 40px 0;
}
.empty-icon {
  width: 56px;
  height: 56px;
  margin: 0 auto 18px;
  color: var(--text-muted);
}
.empty-state h3 {
  font-size: 24px;
  color: var(--text-primary);
  margin-bottom: 10px;
}
.empty-state p {
  color: var(--text-secondary);
  margin-bottom: 24px;
}
.related-section {
  padding: clamp(64px, 8vw, 96px) 0;
  background: var(--bg-secondary);
  border-top: 1px solid var(--border);
}
.section-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 36px;
}
.section-head h2 {
  font-size: clamp(28px, 4vw, 36px);
  font-weight: 700;
  color: var(--text-primary);
}
.related-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.related-card {
  display: flex;
  flex-direction: column;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 16px;
  overflow: hidden;
  transition: transform 0.25s ease, border-color 0.25s ease, box-shadow 0.25s ease;
}
.related-card:hover {
  transform: translateY(-4px);
  border-color: rgba(0, 229, 255, 0.5);
  box-shadow: 0 0 24px rgba(0, 229, 255, 0.25);
}
.related-card img {
  width: 100%;
  height: 160px;
  object-fit: cover;
  border-bottom: 1px solid var(--border);
}
.related-card-body {
  padding: 22px;
  display: flex;
  flex-direction: column;
  gap: 10px;
  flex: 1;
}
.related-card-body h3 {
  font-size: 18px;
  font-weight: 700;
  color: var(--text-primary);
  line-height: 1.5;
}
.related-card-body p {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.7;
  flex: 1;
}
.read-more {
  font-size: 14px;
  color: var(--accent);
  font-weight: 600;
  transition: letter-spacing 0.2s;
}
.related-card:hover .read-more {
  letter-spacing: 0.03em;
}
.cta-section {
  padding: clamp(64px, 8vw, 96px) 0;
}
.cta-panel {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 32px;
  padding: clamp(32px, 5vw, 52px);
  background: linear-gradient(135deg, rgba(0, 229, 255, 0.12), rgba(255, 45, 149, 0.08));
  border: 1px solid rgba(0, 229, 255, 0.3);
  border-radius: 20px;
  box-shadow: 0 0 30px rgba(0, 229, 255, 0.08);
}
.cta-content h2 {
  font-size: clamp(24px, 3vw, 32px);
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 10px;
}
.cta-content p {
  color: var(--text-secondary);
  font-size: 16px;
  max-width: 560px;
}
.cta-actions {
  display: flex;
  gap: 16px;
  flex-shrink: 0;
  flex-wrap: wrap;
}
.site-footer {
  background: #070a10;
  border-top: 1px solid rgba(0, 229, 255, 0.2);
  padding-top: 56px;
}
.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 40px;
}
.footer-brand .logo-text {
  font-size: 22px;
}
.footer-brand p {
  margin-top: 14px;
  color: var(--text-secondary);
  font-size: 14px;
  line-height: 1.8;
  max-width: 320px;
}
.footer-col h4 {
  color: var(--text-primary);
  font-size: 16px;
  font-weight: 600;
  margin-bottom: 18px;
}
.footer-col ul {
  list-style: none;
  padding: 0;
  margin: 0;
}
.footer-col ul li {
  margin-bottom: 10px;
}
.footer-col ul a {
  color: var(--text-secondary);
  font-size: 14px;
  transition: color 0.2s;
}
.footer-col ul a:hover {
  color: var(--accent);
}
.footer-contact-info {
  color: var(--text-secondary);
  font-size: 14px;
  line-height: 2;
}
.footer-bottom {
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 8px;
  padding: 24px 0 32px;
  margin-top: 40px;
  border-top: 1px solid rgba(255, 255, 255, 0.06);
  color: var(--text-muted);
  font-size: 13px;
}
@media (max-width: 1024px) {
  .nav-link {
    padding: 8px 10px;
    font-size: 14px;
  }
  .related-grid {
    grid-template-columns: repeat(3, 1fr);
    gap: 16px;
  }
  .article-title-wrap h1 {
    font-size: 40px;
  }
}
@media (max-width: 768px) {
  .container {
    padding: 0 20px;
  }
  .main-header {
    height: 64px;
  }
  .header-inner {
    height: 64px;
  }
  .main-nav,
  .nav-cta {
    display: none;
  }
  .hamburger {
    display: flex;
  }
  .mobile-drawer {
    top: 64px;
  }
  .article-hero {
    padding: 40px 0 30px;
  }
  .article-title-wrap h1 {
    font-size: 34px;
  }
  .post-pagination {
    grid-template-columns: 1fr;
  }
  .related-grid {
    grid-template-columns: 1fr;
  }
  .cta-panel {
    flex-direction: column;
    align-items: flex-start;
  }
  .cta-actions {
    width: 100%;
  }
  .cta-actions .btn {
    flex: 1;
  }
  .footer-grid {
    grid-template-columns: 1fr 1fr;
    gap: 28px;
  }
  .section-head {
    flex-direction: column;
    align-items: flex-start;
  }
}
@media (max-width: 520px) {
  .container {
    padding: 0 16px;
  }
  .article-title-wrap h1 {
    font-size: 28px;
  }
  .article-meta {
    gap: 12px;
  }
  .btn {
    width: 100%;
  }
  .cta-actions {
    flex-direction: column;
  }
  .footer-grid {
    grid-template-columns: 1fr;
    gap: 24px;
  }
  .footer-bottom {
    flex-direction: column;
    align-items: center;
    text-align: center;
  }
  .related-card img {
    height: 140px;
  }
  .article-hero {
    background-position: 72% center;
  }
}

/* roulang page: category3 */
:root {
  --bg-main: #0a0d14;
  --bg-secondary: #0e1320;
  --bg-card: #151c2c;
  --bg-card-hover: #1b2438;
  --accent-primary: #00e5ff;
  --accent-weak: #0891b2;
  --accent-secondary: #ff2d95;
  --accent-gold: #f5c451;
  --text-main: #f2f6ff;
  --text-secondary: #a6b0c3;
  --text-muted: #6b7688;
  --border: rgba(255,255,255,0.08);
  --glow-primary: rgba(0,229,255,0.55);
  --glow-secondary: rgba(255,45,149,0.45);
  --radius-lg: 20px;
  --radius-md: 14px;
  --radius-sm: 10px;
  --radius-pill: 999px;
  --shadow-card: 0 8px 30px rgba(0,0,0,0.45);
  --shadow-glow: 0 0 24px rgba(0,229,255,0.25);
  --font-stack: -apple-system, "PingFang SC", "Microsoft YaHei", "HarmonyOS Sans SC", "Noto Sans CJK SC", sans-serif;
  --mono-stack: "SF Mono", "Cascadia Code", "Roboto Mono", Consolas, monospace;
  --spacing-section: clamp(64px, 8vw, 96px);
  --container-max: 1200px;
}
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}
html {
  scroll-behavior: smooth;
}
body {
  font-family: var(--font-stack);
  background-color: var(--bg-main);
  color: var(--text-main);
  line-height: 1.7;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}
img {
  max-width: 100%;
  display: block;
}
a {
  color: var(--accent-primary);
  text-decoration: none;
  transition: color 0.2s ease;
}
a:hover {
  color: var(--accent-primary);
  filter: brightness(1.1);
}
ul {
  list-style: none;
}
button, input, select, textarea {
  font-family: var(--font-stack);
  font-size: 1rem;
}
.container {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 24px;
}
.section {
  padding: var(--spacing-section) 0;
}
.section-header {
  text-align: center;
  max-width: 720px;
  margin: 0 auto 48px;
}
.section-header h2 {
  font-size: clamp(30px, 4vw, 38px);
  font-weight: 700;
  line-height: 1.3;
  margin-bottom: 16px;
}
.section-header p {
  color: var(--text-secondary);
  font-size: 17px;
  line-height: 1.7;
}
.section-header .section-badge {
  display: inline-block;
  background: rgba(0,229,255,0.09);
  border: 1px solid rgba(0,229,255,0.2);
  color: var(--accent-primary);
  font-size: 13px;
  font-weight: 600;
  padding: 6px 16px;
  border-radius: var(--radius-pill);
  margin-bottom: 18px;
  letter-spacing: 0.5px;
}

/* Header & Nav */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  height: 72px;
  background: rgba(10,13,20,0.92);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid rgba(0,229,255,0.2);
  box-shadow: 0 1px 20px rgba(0,229,255,0.06);
}
.header-inner {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 24px;
  height: 72px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
}
.logo-icon {
  width: 38px;
  height: 38px;
  border-radius: 10px;
  background: linear-gradient(135deg, rgba(0,229,255,0.2), rgba(255,45,149,0.2));
  border: 1px solid rgba(0,229,255,0.4);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}
.logo-icon svg {
  width: 20px;
  height: 20px;
  stroke: var(--accent-primary);
}
.logo-text {
  font-size: 20px;
  font-weight: 800;
  color: var(--text-main);
  letter-spacing: 0.5px;
  white-space: nowrap;
}
.logo-text span {
  background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.main-nav {
  display: flex;
  align-items: center;
  gap: 6px;
}
.nav-link {
  display: inline-flex;
  align-items: center;
  height: 40px;
  padding: 0 18px;
  font-size: 15px;
  font-weight: 500;
  color: var(--text-secondary);
  border-radius: var(--radius-sm);
  position: relative;
  transition: color 0.25s ease, background 0.25s ease, box-shadow 0.25s ease;
}
.nav-link:hover {
  color: var(--accent-primary);
  background: rgba(0,229,255,0.06);
  text-shadow: 0 0 12px rgba(0,229,255,0.4);
}
.nav-link::after {
  content: "";
  position: absolute;
  bottom: -4px;
  left: 50%;
  transform: translateX(-50%) scaleX(0);
  width: 24px;
  height: 2px;
  border-radius: 2px;
  background: linear-gradient(90deg, var(--accent-primary), var(--accent-secondary));
  transition: transform 0.25s ease;
}
.nav-link.active {
  color: var(--accent-primary);
  background: rgba(0,229,255,0.07);
  text-shadow: 0 0 12px rgba(0,229,255,0.35);
}
.nav-link.active::after {
  transform: translateX(-50%) scaleX(1);
}
.nav-cta {
  margin-left: 12px;
}
.btn-header {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  height: 40px;
  padding: 0 22px;
  background: linear-gradient(135deg, var(--accent-primary), #00b8d4);
  color: #0a1620;
  font-size: 14px;
  font-weight: 700;
  border: none;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: box-shadow 0.25s ease, transform 0.2s ease, filter 0.2s ease;
}
.btn-header:hover {
  box-shadow: 0 0 20px rgba(0,229,255,0.45);
  filter: brightness(1.08);
  color: #0a1620;
}
.btn-header:active {
  transform: translateY(1px);
}
.hamburger {
  display: none;
  width: 44px;
  height: 44px;
  background: transparent;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  cursor: pointer;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  gap: 5px;
}
.hamburger span {
  display: block;
  width: 20px;
  height: 2px;
  background: var(--text-main);
  border-radius: 2px;
  transition: transform 0.3s ease, opacity 0.3s ease;
}
.mobile-nav {
  display: none;
  position: fixed;
  top: 72px;
  left: 0;
  right: 0;
  z-index: 999;
  background: rgba(10,13,20,0.98);
  border-bottom: 1px solid var(--border);
  padding: 24px;
  flex-direction: column;
  gap: 8px;
}
.mobile-nav.open {
  display: flex;
}
.mobile-nav .nav-link {
  height: auto;
  padding: 16px 20px;
  font-size: 20px;
  border-radius: var(--radius-md);
}
.mobile-nav .btn-header {
  margin-top: 16px;
  justify-content: center;
  height: 50px;
}

/* Breadcrumb */
.breadcrumb-wrap {
  padding-top: 72px;
  background: var(--bg-main);
  border-bottom: 1px solid var(--border);
}
.breadcrumb {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 18px 24px;
  font-size: 14px;
  color: var(--text-muted);
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px;
}
.breadcrumb a {
  color: var(--text-muted);
}
.breadcrumb a:hover {
  color: var(--accent-primary);
}
.breadcrumb .sep {
  color: var(--text-muted);
  opacity: 0.5;
}
.breadcrumb .current {
  color: var(--accent-primary);
}

/* Hero */
.category-hero {
  position: relative;
  min-height: 560px;
  display: flex;
  align-items: center;
  background-image: url('/assets/images/backpic/back-2.webp');
  background-size: cover;
  background-position: center;
  overflow: hidden;
}
.category-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(90deg, rgba(10,13,20,0.96) 0%, rgba(10,13,20,0.8) 45%, rgba(10,13,20,0.35) 100%);
}
.category-hero::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 120px;
  background: linear-gradient(to top, var(--bg-main) 0%, transparent 100%);
}
.hero-inner {
  position: relative;
  z-index: 2;
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 80px 24px;
  width: 100%;
}
.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(0,229,255,0.1);
  border: 1px solid rgba(0,229,255,0.25);
  border-radius: var(--radius-pill);
  padding: 6px 16px;
  font-size: 13px;
  font-weight: 600;
  color: var(--accent-primary);
  margin-bottom: 24px;
}
.hero-banner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
  display: flex;
  align-items: center;
  gap: 24px;
  min-height: 400px;
}
.hero-content {
  flex: 1;
  padding: 60px 0;
}
.hero-content h1 {
  font-size: clamp(42px, 6vw, 64px);
  font-weight: 800;
  line-height: 1.15;
  margin-bottom: 24px;
  color: var(--text-main);
}
.hero-content h1 .highlight {
  background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.hero-content p {
  font-size: clamp(16px, 2vw, 20px);
  color: var(--text-secondary);
  line-height: 1.8;
  max-width: 620px;
  margin-bottom: 36px;
}
.hero-cta {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}
.btn-primary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  height: 48px;
  padding: 0 32px;
  background: linear-gradient(135deg, var(--accent-primary), #00b8d4);
  color: #0a1620;
  font-size: 16px;
  font-weight: 700;
  border: none;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: box-shadow 0.25s ease, transform 0.2s ease, filter 0.2s ease;
}
.btn-primary:hover {
  box-shadow: 0 0 24px rgba(0,229,255,0.5);
  filter: brightness(1.1);
  color: #0a1620;
  transform: translateY(-1px);
}
.btn-primary:active {
  transform: translateY(1px);
}
.btn-outline {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  height: 48px;
  padding: 0 32px;
  background: transparent;
  border: 1px solid var(--accent-primary);
  color: var(--accent-primary);
  font-size: 16px;
  font-weight: 600;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: background 0.25s ease, box-shadow 0.25s ease, transform 0.2s ease;
}
.btn-outline:hover {
  background: rgba(0,229,255,0.12);
  box-shadow: 0 0 20px rgba(0,229,255,0.25);
  color: var(--accent-primary);
  transform: translateY(-1px);
}
.btn-outline:active {
  transform: translateY(1px);
}

/* Info Cards */
.info-cards {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  margin-top: 40px;
}
.info-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 24px;
  transition: border-color 0.3s ease, box-shadow 0.3s ease, transform 0.3s ease;
}
.info-card:hover {
  border-color: var(--accent-primary);
  box-shadow: var(--shadow-glow);
  transform: translateY(-2px);
}
.info-card .info-icon {
  width: 40px;
  height: 40px;
  border-radius: 10px;
  background: rgba(0,229,255,0.1);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 16px;
}
.info-card .info-icon svg {
  width: 20px;
  height: 20px;
  stroke: var(--accent-primary);
}
.info-card h3 {
  font-size: 18px;
  font-weight: 700;
  margin-bottom: 8px;
}
.info-card p {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.6;
}

/* Feature Grid */
.feature-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.feature-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 32px;
  transition: border-color 0.3s ease, box-shadow 0.3s ease, transform 0.3s ease;
}
.feature-card:hover {
  border-color: rgba(0,229,255,0.45);
  box-shadow: 0 0 30px rgba(0,229,255,0.12);
  transform: translateY(-4px);
}
.feature-card .feature-icon {
  width: 48px;
  height: 48px;
  border-radius: 12px;
  background: linear-gradient(135deg, rgba(0,229,255,0.15), rgba(255,45,149,0.1));
  border: 1px solid rgba(0,229,255,0.2);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 20px;
}
.feature-card .feature-icon svg {
  width: 24px;
  height: 24px;
  stroke: var(--accent-primary);
}
.feature-card h3 {
  font-size: 20px;
  font-weight: 700;
  margin-bottom: 12px;
}
.feature-card p {
  font-size: 15px;
  color: var(--text-secondary);
  line-height: 1.7;
}
.feature-card .feature-list {
  margin-top: 16px;
  padding-top: 16px;
  border-top: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.feature-list li {
  font-size: 14px;
  color: var(--text-secondary);
  display: flex;
  align-items: flex-start;
  gap: 8px;
}
.feature-list li svg {
  width: 14px;
  height: 14px;
  flex-shrink: 0;
  stroke: var(--accent-primary);
  margin-top: 3px;
}

/* News Showcase */
.news-showcase {
  background: var(--bg-secondary);
}
.news-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
}
.news-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: box-shadow 0.3s ease, transform 0.3s ease, border-color 0.3s ease;
}
.news-card:hover {
  box-shadow: 0 12px 36px rgba(0,0,0,0.5);
  transform: translateY(-4px);
  border-color: rgba(0,229,255,0.4);
}
.news-card-img {
  width: 100%;
  height: 200px;
  overflow: hidden;
  position: relative;
}
.news-card-img img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.4s ease;
}
.news-card:hover .news-card-img img {
  transform: scale(1.04);
}
.news-card-body {
  padding: 24px;
}
.news-card-body .news-tag {
  display: inline-block;
  background: rgba(245,196,81,0.12);
  border: 1px solid rgba(245,196,81,0.3);
  color: var(--accent-gold);
  font-size: 12px;
  font-weight: 600;
  padding: 3px 12px;
  border-radius: var(--radius-pill);
  margin-bottom: 14px;
}
.news-card-body h3 {
  font-size: 20px;
  font-weight: 700;
  line-height: 1.5;
  margin-bottom: 10px;
}
.news-card-body p {
  font-size: 15px;
  color: var(--text-secondary);
  line-height: 1.7;
  margin-bottom: 16px;
}
.news-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 13px;
  color: var(--text-muted);
}
.news-link {
  font-size: 14px;
  font-weight: 600;
  display: inline-flex;
  align-items: center;
  gap: 4px;
  transition: gap 0.2s ease;
}
.news-link:hover {
  gap: 8px;
}

/* Timeline */
.timeline {
  position: relative;
  max-width: 840px;
  margin: 0 auto;
  padding-left: 40px;
}
.timeline::before {
  content: "";
  position: absolute;
  left: 12px;
  top: 0;
  bottom: 0;
  width: 2px;
  background: linear-gradient(to bottom, var(--accent-primary), var(--accent-secondary), transparent);
}
.timeline-item {
  position: relative;
  margin-bottom: 40px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 28px;
}
.timeline-item::before {
  content: "";
  position: absolute;
  left: -32px;
  top: 32px;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--accent-primary);
  box-shadow: 0 0 12px var(--glow-primary);
}
.timeline-item .tl-tag {
  font-size: 13px;
  font-weight: 600;
  color: var(--accent-gold);
  margin-bottom: 8px;
  display: block;
}
.timeline-item h3 {
  font-size: 20px;
  font-weight: 700;
  margin-bottom: 10px;
}
.timeline-item p {
  font-size: 15px;
  color: var(--text-secondary);
  line-height: 1.7;
}

/* FAQ */
.faq-wrap {
  max-width: 860px;
  margin: 0 auto;
}
.faq-item {
  border-bottom: 1px solid var(--border);
}
.faq-item:last-child {
  border-bottom: none;
}
.faq-question {
  width: 100%;
  height: 60px;
  background: transparent;
  border: none;
  color: var(--text-main);
  font-size: 17px;
  font-weight: 600;
  text-align: left;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 8px;
  transition: color 0.2s ease;
}
.faq-question:hover {
  color: var(--accent-primary);
}
.faq-icon {
  width: 28px;
  height: 28px;
  border-radius: 50%;
  border: 1px solid var(--text-muted);
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  transition: transform 0.3s ease, border-color 0.3s ease;
  flex-shrink: 0;
}
.faq-icon::before,
.faq-icon::after {
  content: "";
  position: absolute;
  background: var(--text-muted);
  transition: background 0.3s ease;
}
.faq-icon::before {
  width: 12px;
  height: 2px;
}
.faq-icon::after {
  width: 2px;
  height: 12px;
}
.faq-item.open .faq-icon {
  transform: rotate(135deg);
  border-color: var(--accent-primary);
}
.faq-item.open .faq-icon::before,
.faq-item.open .faq-icon::after {
  background: var(--accent-primary);
}
.faq-answer {
  max-height: 0;
  opacity: 0;
  overflow: hidden;
  transition: max-height 0.4s ease, opacity 0.4s ease, padding 0.4s ease;
  padding: 0 8px;
  border-left: 2px solid transparent;
}
.faq-item.open .faq-answer {
  max-height: 400px;
  opacity: 1;
  padding: 0 16px 24px;
  border-left-color: var(--accent-primary);
  background: rgba(0,229,255,0.04);
  border-radius: 0 8px 8px 0;
}
.faq-answer p {
  font-size: 15px;
  color: var(--text-secondary);
  line-height: 1.8;
}

/* CTA Section */
.cta-section {
  position: relative;
  background: linear-gradient(135deg, #0e1320 0%, #151c2c 50%, #0e1320 100%);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 48px;
  overflow: hidden;
}
.cta-section::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: linear-gradient(90deg, transparent, var(--accent-primary), var(--accent-secondary), transparent);
}
.cta-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 40px;
  flex-wrap: wrap;
  position: relative;
  z-index: 2;
}
.cta-content h2 {
  font-size: clamp(24px, 3vw, 32px);
  font-weight: 700;
  margin-bottom: 12px;
}
.cta-content p {
  font-size: 16px;
  color: var(--text-secondary);
  max-width: 520px;
}
.cta-actions {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}

/* Footer */
.site-footer {
  background: #070a10;
  border-top: 1px solid rgba(0,229,255,0.15);
  padding-top: 64px;
  position: relative;
}
.site-footer::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(0,229,255,0.4), rgba(255,45,149,0.3), transparent);
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.6fr 1fr 1fr 1fr;
  gap: 40px;
  padding-bottom: 48px;
}
.footer-brand .logo-text {
  font-size: 22px;
  font-weight: 800;
  margin-bottom: 16px;
  display: block;
}
.footer-brand p {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.8;
  margin-top: 12px;
}
.footer-col h4 {
  font-size: 16px;
  font-weight: 700;
  color: var(--text-main);
  margin-bottom: 20px;
}
.footer-col ul {
  display: flex;
  flex-direction: column;
  gap: 12px;
}
.footer-col ul li a {
  font-size: 14px;
  color: var(--text-secondary);
  transition: color 0.2s ease, padding-left 0.2s ease;
}
.footer-col ul li a:hover {
  color: var(--accent-primary);
  padding-left: 4px;
}
.footer-contact-info {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 2.2;
}
.footer-bottom {
  border-top: 1px solid var(--border);
  padding: 20px 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 8px;
  font-size: 13px;
  color: var(--text-muted);
}

/* Responsive */
@media (max-width: 1200px) {
  .container, .header-inner, .breadcrumb {
    padding-left: 20px;
    padding-right: 20px;
  }
}
@media (max-width: 1024px) {
  .hero-content h1 {
    font-size: 40px;
  }
  .info-cards {
    grid-template-columns: repeat(2, 1fr);
  }
  .footer-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 32px;
  }
}
@media (max-width: 768px) {
  .main-nav, .nav-cta {
    display: none;
  }
  .hamburger {
    display: flex;
  }
  .hero-content h1 {
    font-size: 34px;
  }
  .feature-grid {
    grid-template-columns: 1fr;
  }
  .news-grid {
    grid-template-columns: 1fr;
  }
  .info-cards {
    grid-template-columns: 1fr;
  }
  .cta-section {
    padding: 32px;
  }
  .breadcrumb {
    padding-left: 16px;
    padding-right: 16px;
  }
  .footer-grid {
    grid-template-columns: 1fr;
  }
  .hero-banner {
    flex-direction: column;
    padding: 0 16px;
  }
  .hero-content {
    padding: 48px 0;
  }
}
@media (max-width: 520px) {
  .container, .header-inner {
    padding-left: 16px;
    padding-right: 16px;
  }
  .btn-primary, .btn-outline {
    width: 100%;
  }
  .hero-cta {
    flex-direction: column;
    gap: 12px;
  }
  .section-header {
    text-align: left;
  }
  .cta-actions {
    flex-direction: column;
    width: 100%;
  }
  .cta-actions .btn-primary,
  .cta-actions .btn-outline {
    width: 100%;
  }
  .footer-bottom {
    flex-direction: column;
    text-align: center;
  }
}

/* roulang page: category2 */
:root {
  --bg-primary: #0a0d14;
  --bg-secondary: #0e1320;
  --bg-card: #151c2c;
  --bg-card-hover: #1b2438;
  --accent: #00e5ff;
  --accent-dim: #0891b2;
  --accent-pink: #ff2d95;
  --gold: #f5c451;
  --text-primary: #f2f6ff;
  --text-secondary: #a6b0c3;
  --text-muted: #6b7688;
  --border: rgba(255,255,255,0.08);
  --glow: rgba(0,229,255,0.55);
  --glow-pink: rgba(255,45,149,0.45);
  --radius-lg: 20px;
  --radius-md: 14px;
  --radius-sm: 10px;
  --container: 1200px;
  --header-h: 72px;
  --spacer: clamp(64px, 8vw, 96px);
  --font: -apple-system, "PingFang SC", "Microsoft YaHei", "HarmonyOS Sans SC", "Noto Sans CJK SC", sans-serif;
  --mono: ui-monospace, "SF Mono", "Cascadia Code", Consolas, monospace;
}
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: var(--font);
  color: var(--text-primary);
  background: var(--bg-primary);
  line-height: 1.7;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}
a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }
button, input, select, textarea { font-family: inherit; font-size: inherit; color: inherit; }
.container { max-width: var(--container); margin: 0 auto; padding: 0 24px; position: relative; z-index: 1; }
section { position: relative; }

/* === Header / Nav === */
.site-header {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 1000;
  height: var(--header-h);
  background: rgba(10,13,20,0.92);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid rgba(0,229,255,0.2);
}
.site-header::after {
  content: "";
  position: absolute;
  left: 0; right: 0; bottom: -1px;
  height: 1px;
  background: linear-gradient(90deg, rgba(0,229,255,0.6), rgba(255,45,149,0.4), transparent);
}
.header-inner {
  height: var(--header-h);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}
.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
}
.logo-icon {
  width: 38px; height: 38px;
  border-radius: 10px;
  background: linear-gradient(135deg, var(--accent), var(--accent-pink));
  display: flex; align-items: center; justify-content: center;
  font-size: 18px; font-weight: 800;
  color: #06121a;
  box-shadow: 0 0 16px rgba(0,229,255,0.35);
}
.logo-text {
  font-size: 19px;
  font-weight: 800;
  letter-spacing: 0.02em;
  background: linear-gradient(90deg, #f2f6ff, var(--accent));
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  white-space: nowrap;
}
.main-nav {
  display: flex;
  align-items: center;
  gap: 6px;
}
.nav-link {
  position: relative;
  display: inline-block;
  padding: 10px 18px;
  font-size: 15px;
  font-weight: 500;
  color: var(--text-secondary);
  border-radius: 8px;
  transition: color 0.25s ease, background 0.25s ease;
}
.nav-link::after {
  content: "";
  position: absolute;
  left: 50%; bottom: 0;
  width: 0; height: 2px;
  background: var(--accent);
  transform: translateX(-50%);
  border-radius: 2px;
  transition: width 0.3s ease, box-shadow 0.3s ease;
}
.nav-link:hover {
  color: var(--accent);
  text-shadow: 0 0 12px rgba(0,229,255,0.6);
}
.nav-link:hover::after,
.nav-link.active::after {
  width: 60%;
  box-shadow: 0 0 10px rgba(0,229,255,0.7);
}
.nav-link.active {
  color: var(--accent);
  text-shadow: 0 0 14px rgba(0,229,255,0.6);
  background: rgba(0,229,255,0.06);
}
.header-cta {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 10px 22px;
  font-size: 15px;
  font-weight: 700;
  color: #06121a;
  background: linear-gradient(135deg, var(--accent), var(--accent-dim));
  border: none;
  border-radius: 10px;
  cursor: pointer;
  transition: box-shadow 0.25s ease, transform 0.15s ease;
  white-space: nowrap;
}
.header-cta:hover {
  box-shadow: 0 0 24px rgba(0,229,255,0.5);
  transform: translateY(-1px);
}
.header-cta:active { transform: translateY(0); }
.nav-toggle {
  display: none;
  width: 44px; height: 44px;
  border: 1px solid var(--border);
  border-radius: 10px;
  background: transparent;
  cursor: pointer;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 5px;
}
.nav-toggle span {
  display: block;
  width: 20px; height: 2px;
  background: var(--text-primary);
  border-radius: 2px;
  transition: all 0.3s ease;
}
.nav-toggle.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-toggle.open span:nth-child(2) { opacity: 0; }
.nav-toggle.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* === Category Hero === */
.cat-hero {
  min-height: clamp(420px, 78vh, 620px);
  display: flex;
  align-items: center;
  padding: calc(var(--header-h) + 40px) 0 60px;
  background:
    linear-gradient(90deg, rgba(10,13,20,0.92) 20%, rgba(10,13,20,0.55) 60%, rgba(10,13,20,0.35) 100%),
    url('/assets/images/backpic/back-1.png') no-repeat center center / cover;
}
.cat-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse at 15% 40%, rgba(0,229,255,0.08), transparent 55%);
  pointer-events: none;
}
.cat-hero-inner {
  max-width: 680px;
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 24px;
}
.status-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 16px;
  border-radius: 999px;
  background: rgba(0,229,255,0.08);
  border: 1px solid rgba(0,229,255,0.3);
  font-size: 13px;
  color: var(--accent);
}
.status-badge i {
  width: 7px; height: 7px;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 8px var(--accent);
  animation: pulse 1.6s ease infinite;
}
@keyframes pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.5; transform: scale(0.8); }
}
.cat-hero h1 {
  font-size: clamp(38px, 5vw, 54px);
  font-weight: 800;
  line-height: 1.2;
}
.cat-hero h1 .gradient {
  background: linear-gradient(90deg, var(--accent), var(--accent-pink));
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}
.cat-hero .subtitle {
  font-size: 17px;
  color: var(--text-secondary);
  line-height: 1.8;
  max-width: 560px;
}
.cat-hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  margin-top: 8px;
}
.btn-primary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 46px;
  padding: 0 28px;
  font-size: 15px;
  font-weight: 700;
  color: #06121a;
  background: linear-gradient(135deg, var(--accent), var(--accent-dim));
  border: none;
  border-radius: 10px;
  cursor: pointer;
  transition: box-shadow 0.25s ease, transform 0.15s ease;
}
.btn-primary:hover { box-shadow: 0 0 24px rgba(0,229,255,0.45); transform: translateY(-2px); }
.btn-primary:active { transform: translateY(0); }
.btn-outline {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 46px;
  padding: 0 28px;
  font-size: 15px;
  font-weight: 600;
  color: var(--text-primary);
  background: transparent;
  border: 1px solid var(--accent);
  border-radius: 10px;
  cursor: pointer;
  transition: all 0.25s ease;
}
.btn-outline:hover {
  background: rgba(0,229,255,0.12);
  box-shadow: 0 0 18px rgba(0,229,255,0.2);
  color: var(--accent);
}
.hero-float-card {
  position: absolute;
  right: max(24px, 6vw);
  bottom: 48px;
  width: 240px;
  padding: 20px 24px;
  background: rgba(21,28,44,0.9);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  backdrop-filter: blur(8px);
  box-shadow: 0 8px 30px rgba(0,0,0,0.45);
}
.hero-float-card .label { font-size: 12px; color: var(--text-muted); letter-spacing: 0.1em; }
.hero-float-card .value {
  font-family: var(--mono);
  font-size: 30px;
  font-weight: 700;
  color: var(--accent);
  text-shadow: 0 0 14px rgba(0,229,255,0.4);
  margin-top: 4px;
}

/* === Breadcrumb === */
.breadcrumb-wrap {
  padding: 20px 0 0;
  background: var(--bg-primary);
  border-bottom: 1px solid var(--border);
}
.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 6px;
  font-size: 14px;
  color: var(--text-muted);
}
.breadcrumb a { color: var(--text-secondary); transition: color 0.2s; }
.breadcrumb a:hover { color: var(--accent); }
.breadcrumb .sep { opacity: 0.5; }
.breadcrumb .current { color: var(--accent); }

/* === Section common === */
.section { padding: var(--spacer) 0; position: relative; }
.section.tone-secondary { background: var(--bg-secondary); }
.section-tag {
  display: inline-block;
  padding: 4px 14px;
  font-size: 12px;
  font-weight: 600;
  color: var(--gold);
  background: rgba(245,196,81,0.1);
  border: 1px solid rgba(245,196,81,0.25);
  border-radius: 999px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}
.section-head {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-end;
  justify-content: space-between;
  gap: 18px;
  margin-bottom: 44px;
}
.section-head h2 {
  font-size: clamp(28px, 4vw, 38px);
  font-weight: 800;
  line-height: 1.25;
  margin-top: 14px;
}
.section-head .desc {
  color: var(--text-secondary);
  max-width: 560px;
  font-size: 16px;
}
.section-head.center { flex-direction: column; align-items: center; text-align: center; }
.section-head.center .desc { margin: 0 auto; }

/* === Stats dashboard === */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}
.stat-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: clamp(22px, 3vw, 32px);
  transition: all 0.3s ease;
  position: relative;
  overflow: hidden;
}
.stat-card::before {
  content: "";
  position: absolute;
  top: 0; left: 0;
  width: 100%; height: 3px;
  background: linear-gradient(90deg, var(--accent), transparent);
  opacity: 0.5;
  transition: opacity 0.3s;
}
.stat-card:hover { border-color: rgba(0,229,255,0.4); box-shadow: 0 8px 30px rgba(0,0,0,0.45); }
.stat-card:hover::before { opacity: 1; }
.stat-label {
  font-size: 13px;
  color: var(--text-muted);
  letter-spacing: 0.06em;
}
.stat-value {
  font-family: var(--mono);
  font-size: clamp(36px, 5vw, 52px);
  font-weight: 600;
  color: var(--accent);
  text-shadow: 0 0 18px rgba(0,229,255,0.35);
  margin-top: 8px;
  line-height: 1.2;
}
.stat-value .unit { font-size: 18px; color: var(--text-muted); margin-left: 4px; }
.stat-note { font-size: 13px; color: var(--text-muted); margin-top: 6px; }

/* === Bento matrix === */
.bento-grid {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: 24px;
}
.bento-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: all 0.3s ease;
  display: flex;
  flex-direction: column;
}
.bento-card:hover {
  border-color: rgba(0,229,255,0.4);
  box-shadow: 0 0 30px rgba(0,229,255,0.15), 0 8px 30px rgba(0,0,0,0.45);
  transform: translateY(-4px);
}
.bento-large {
  grid-column: span 4;
}
.bento-small {
  grid-column: span 2;
}
.bento-image {
  width: 100%;
  height: auto;
  aspect-ratio: 16/7;
  object-fit: cover;
}
.bento-body {
  padding: clamp(20px, 3vw, 30px);
  display: flex;
  flex-direction: column;
  gap: 12px;
  flex: 1;
}
.bento-body h3 {
  font-size: clamp(20px, 2vw, 24px);
  font-weight: 700;
}
.bento-body p { color: var(--text-secondary); font-size: 15px; line-height: 1.7; }
.bento-features {
  list-style: none;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px;
  margin-top: 4px;
}
.bento-features li {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 14px;
  color: var(--text-secondary);
}
.bento-features li::before {
  content: "✓";
  color: var(--accent);
  font-weight: 700;
  flex-shrink: 0;
}
.bento-link {
  margin-top: auto;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 14px;
  font-weight: 600;
  color: var(--accent);
  transition: gap 0.2s ease;
}
.bento-link:hover { gap: 10px; }
.bento-link .arrow { transition: transform 0.2s; }
.bento-small-icon {
  width: 44px; height: 44px;
  border-radius: 12px;
  background: rgba(0,229,255,0.08);
  border: 1px solid rgba(0,229,255,0.2);
  display: flex; align-items: center; justify-content: center;
  margin-bottom: 4px;
}
.bento-small-icon svg { width: 24px; height: 24px; stroke: var(--accent); fill: none; stroke-width: 1.6; }
.bento-small .bento-body { gap: 10px; }
.bento-small .bento-body p { font-size: 14px; }

/* === Workflow === */
.workflow-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  counter-reset: step;
}
.workflow-step {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 30px 24px;
  position: relative;
  transition: all 0.3s ease;
}
.workflow-step:hover { border-color: rgba(0,229,255,0.35); box-shadow: 0 8px 30px rgba(0,0,0,0.45); transform: translateY(-4px); }
.workflow-step::before {
  counter-increment: step;
  content: counter(step, decimal-leading-zero);
  font-family: var(--mono);
  font-size: 40px;
  font-weight: 800;
  background: linear-gradient(135deg, var(--accent), var(--accent-pink));
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  line-height: 1;
  display: block;
  margin-bottom: 14px;
}
.workflow-step h3 { font-size: 18px; font-weight: 700; margin-bottom: 8px; }
.workflow-step p { color: var(--text-secondary); font-size: 14px; }

/* === Comparison === */
.comparison-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 32px;
  align-items: stretch;
}
.comparison-col {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 32px;
}
.comparison-col.right {
  border-color: rgba(0,229,255,0.5);
  box-shadow: 0 0 24px rgba(0,229,255,0.12);
}
.comparison-col h3 {
  font-size: 22px;
  font-weight: 700;
  margin-bottom: 24px;
  display: flex;
  align-items: center;
  gap: 10px;
}
.comparison-col.right h3 { color: var(--accent); }
.comparison-list { list-style: none; }
.comparison-list li {
  display: flex;
  gap: 12px;
  padding: 14px 0;
  border-bottom: 1px solid var(--border);
  font-size: 15px;
  color: var(--text-secondary);
  line-height: 1.6;
}
.comparison-list li:last-child { border-bottom: none; }
.comparison-list li .icon { flex-shrink: 0; font-weight: 700; width: 20px; text-align: center; }
.comparison-list li .icon.no { color: var(--text-muted); }
.comparison-list li .icon.yes { color: var(--accent); }
.comparison-rate {
  margin-top: 32px;
  padding: 20px 24px;
  background: rgba(0,229,255,0.04);
  border-radius: var(--radius-md);
  border: 1px solid rgba(0,229,255,0.15);
}
.comparison-rate .rate-label {
  font-size: 14px;
  color: var(--text-secondary);
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 12px;
}
.comparison-rate .rate-label strong { color: var(--accent); font-family: var(--mono); }
.rate-bar {
  height: 10px;
  background: rgba(255,255,255,0.08);
  border-radius: 999px;
  overflow: hidden;
}
.rate-bar-fill {
  height: 100%;
  width: 86%;
  background: linear-gradient(90deg, var(--accent), var(--accent-pink));
  border-radius: 999px;
  box-shadow: 0 0 12px rgba(0,229,255,0.4);
}

/* === Guide updates === */
.guide-list {
  display: flex;
  flex-direction: column;
  gap: 20px;
}
.guide-item {
  display: flex;
  align-items: center;
  gap: 20px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 16px 20px;
  transition: all 0.3s ease;
}
.guide-item:hover { border-color: rgba(0,229,255,0.35); box-shadow: 0 6px 20px rgba(0,0,0,0.4); transform: translateX(4px); }
.guide-thumb {
  width: 120px; height: 80px;
  border-radius: 10px;
  object-fit: cover;
  flex-shrink: 0;
}
.guide-info { flex: 1; min-width: 0; }
.guide-tag {
  display: inline-block;
  padding: 2px 10px;
  font-size: 12px;
  color: var(--gold);
  background: rgba(245,196,81,0.1);
  border: 1px solid rgba(245,196,81,0.2);
  border-radius: 999px;
  margin-bottom: 6px;
}
.guide-info h3 {
  font-size: 17px;
  font-weight: 700;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.guide-info p {
  font-size: 14px;
  color: var(--text-muted);
  overflow: hidden;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  margin-top: 4px;
}
.guide-meta {
  display: flex;
  align-items: center;
  gap: 14px;
  font-size: 13px;
  color: var(--text-muted);
  flex-shrink: 0;
}
.guide-link {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  color: var(--accent);
  font-size: 14px;
  font-weight: 600;
  transition: gap 0.2s ease;
}
.guide-link:hover { gap: 8px; }

/* === FAQ === */
.faq-list { max-width: 800px; margin: 0 auto; }
.faq-item {
  border-bottom: 1px solid var(--border);
  transition: background 0.3s ease;
}
.faq-item:first-child { border-top: 1px solid var(--border); }
.faq-question {
  width: 100%;
  min-height: 56px;
  background: none;
  border: none;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 0 8px;
  font-size: 17px;
  font-weight: 600;
  color: var(--text-primary);
  cursor: pointer;
  text-align: left;
  transition: color 0.2s;
}
.faq-question:hover { color: var(--accent); }
.faq-icon {
  flex-shrink: 0;
  width: 26px; height: 26px;
  border: 1px solid var(--border);
  border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  font-size: 16px;
  color: var(--text-secondary);
  transition: all 0.3s ease;
  position: relative;
}
.faq-icon::after {
  content: "";
  width: 10px; height: 2px;
  background: currentColor;
  position: absolute;
  border-radius: 2px;
  transition: transform 0.3s ease;
}
.faq-icon::before {
  content: "";
  width: 10px; height: 2px;
  background: currentColor;
  position: absolute;
  border-radius: 2px;
  transition: opacity 0.3s ease;
}
.faq-item.open .faq-icon::before { opacity: 0; }
.faq-item.open .faq-icon::after { transform: rotate(0deg); }
.faq-item.open .faq-icon { border-color: var(--accent); color: var(--accent); }
.faq-answer {
  max-height: 0;
  overflow: hidden;
  opacity: 0;
  transition: max-height 0.4s ease, opacity 0.3s ease, padding 0.3s ease;
}
.faq-item.open .faq-answer {
  max-height: 300px;
  opacity: 1;
  padding: 0 8px 20px 20px;
}
.faq-answer p {
  color: var(--text-secondary);
  font-size: 15px;
  line-height: 1.8;
  border-left: 2px solid var(--accent);
  padding-left: 16px;
}

/* === Contact / Form === */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1.2fr;
  gap: 48px;
  align-items: start;
}
.contact-info h3 { font-size: 26px; font-weight: 700; margin-bottom: 12px; }
.contact-info > p { color: var(--text-secondary); margin-bottom: 28px; max-width: 400px; }
.contact-methods {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 16px;
}
.contact-methods li {
  display: flex;
  align-items: center;
  gap: 14px;
  font-size: 15px;
  color: var(--text-secondary);
}
.contact-methods li strong { color: var(--text-primary); font-weight: 600; }
.contact-methods .c-icon {
  width: 38px; height: 38px;
  border-radius: 10px;
  background: rgba(0,229,255,0.08);
  border: 1px solid rgba(0,229,255,0.2);
  display: flex; align-items: center; justify-content: center;
  color: var(--accent);
  flex-shrink: 0;
  font-size: 16px;
}
.contact-form {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: clamp(24px, 4vw, 40px);
  box-shadow: 0 8px 30px rgba(0,0,0,0.45);
}
.form-group { margin-bottom: 18px; }
.form-group label {
  display: block;
  font-size: 14px;
  color: var(--text-muted);
  margin-bottom: 8px;
}
.form-group input,
.form-group select,
.form-group textarea {
  width: 100%;
  height: 46px;
  padding: 0 14px;
  background: #0f1524;
  border: 1px solid rgba(255,255,255,0.12);
  border-radius: 10px;
  color: var(--text-primary);
  transition: border-color 0.2s, box-shadow 0.2s;
  outline: none;
}
.form-group textarea { height: auto; min-height: 110px; padding: 12px 14px; resize: vertical; }
.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(0,229,255,0.15);
}
.form-group select {
  appearance: none;
  -webkit-appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8'%3E%3Cpath d='M1 1l5 5 5-5' stroke='%23a6b0c3' stroke-width='2' fill='none' stroke-linecap='round'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 14px center;
}
.form-group select option { background: var(--bg-card); color: var(--text-primary); }
.form-submit {
  width: 100%;
  height: 48px;
  border: none;
  border-radius: 10px;
  cursor: pointer;
  font-size: 16px;
  font-weight: 700;
  color: #06121a;
  background: linear-gradient(135deg, var(--accent), var(--accent-dim));
  transition: box-shadow 0.25s ease, transform 0.15s ease;
}
.form-submit:hover { box-shadow: 0 0 24px rgba(0,229,255,0.45); }
.form-submit:active { transform: translateY(1px); }

/* === Footer === */
.site-footer {
  background: #070a10;
  border-top: 1px solid rgba(0,229,255,0.15);
  position: relative;
}
.site-footer::before {
  content: "";
  position: absolute;
  top: -1px; left: 0; right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(0,229,255,0.6), rgba(255,45,149,0.4), transparent);
}
.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1.2fr;
  gap: 40px;
  padding: 60px 0 40px;
}
.footer-brand .logo-text { font-size: 20px; font-weight: 800; }
.footer-brand p {
  color: var(--text-muted);
  font-size: 14px;
  line-height: 1.8;
  margin-top: 14px;
  max-width: 320px;
}
.footer-col h4 {
  font-size: 15px;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 18px;
}
.footer-col ul { list-style: none; }
.footer-col ul li { margin-bottom: 10px; }
.footer-col ul a {
  color: var(--text-secondary);
  font-size: 14px;
  transition: color 0.2s, padding-left 0.2s;
}
.footer-col ul a:hover { color: var(--accent); padding-left: 4px; }
.footer-contact-info {
  color: var(--text-secondary);
  font-size: 14px;
  line-height: 2;
}
.footer-bottom {
  padding: 22px 0;
  border-top: 1px solid var(--border);
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  justify-content: space-between;
  color: var(--text-muted);
  font-size: 13px;
}

/* === Empty state (备用) === */
.empty-state {
  border: 2px dashed var(--border);
  border-radius: var(--radius-lg);
  padding: 60px 24px;
  text-align: center;
  color: var(--text-muted);
  background: rgba(21,28,44,0.4);
}
.empty-state .icon { font-size: 48px; margin-bottom: 12px; }
.empty-state p { font-size: 15px; }

/* === Responsive === */
@media (max-width: 1200px) {
  .container { padding: 0 20px; }
  .hero-float-card { display: none; }
}
@media (max-width: 1024px) {
  .stat-value { font-size: 38px; }
  .cat-hero h1 { font-size: 40px; }
  .workflow-grid { grid-template-columns: repeat(2, 1fr); }
  .comparison-grid { gap: 20px; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 768px) {
  :root { --header-h: 64px; }
  .main-nav {
    position: fixed;
    top: var(--header-h);
    left: 0; right: 0;
    flex-direction: column;
    background: rgba(10,13,20,0.98);
    padding: 24px 20px;
    gap: 4px;
    border-bottom: 1px solid rgba(0,229,255,0.2);
    transform: translateY(-120%);
    opacity: 0;
    transition: transform 0.35s ease, opacity 0.35s ease;
    z-index: 999;
    box-shadow: 0 20px 40px rgba(0,0,0,0.5);
  }
  .main-nav.open { transform: translateY(0); opacity: 1; }
  .nav-link { font-size: 22px; padding: 16px 20px; width: 100%; text-align: center; }
  .nav-link::after { display: none; }
  .nav-toggle { display: flex; }
  .header-cta { display: none; }
  .stats-grid { grid-template-columns: repeat(2, 1fr); }
  .bento-grid { grid-template-columns: 1fr; }
  .bento-large, .bento-small { grid-column: span 1; }
  .workflow-grid { grid-template-columns: 1fr 1fr; }
  .comparison-grid { grid-template-columns: 1fr; }
  .contact-grid { grid-template-columns: 1fr; gap: 32px; }
  .guide-item { flex-direction: column; align-items: flex-start; }
  .guide-thumb { width: 100%; height: auto; aspect-ratio: 16/9; }
  .guide-meta { width: 100%; justify-content: space-between; }
  .footer-grid { grid-template-columns: 1fr; gap: 32px; padding: 48px 0 32px; }
  .cat-hero { min-height: auto; padding-top: calc(var(--header-h) + 30px); }
  .section-head { flex-direction: column; align-items: flex-start; }
}
@media (max-width: 520px) {
  .container { padding: 0 16px; }
  .stats-grid { gap: 14px; }
  .stat-card { padding: 18px; }
  .stat-value { font-size: 32px; }
  .workflow-grid { grid-template-columns: 1fr; gap: 16px; }
  .cat-hero-actions .btn-primary,
  .cat-hero-actions .btn-outline { width: 100%; }
  .section-head h2 { font-size: 26px; }
  .comparison-col { padding: 22px; }
  .footer-bottom { flex-direction: column; align-items: center; text-align: center; }
}