/* roulang page: index */
:root {
  --bg-main: #0A1120;
  --bg-panel: #101B31;
  --card-bg: rgba(255,255,255,0.045);
  --card-border: rgba(255,255,255,0.09);
  --border-light: rgba(255,255,255,0.08);
  --primary: #00E0C6;
  --blue: #00A6FF;
  --orange: #FF7A1A;
  --text-main: #E6EDF6;
  --text-sub: #93A5B4;
  --text-inverse: #07111F;
  --font-mono: 'Roboto Mono', 'DIN Alternate', ui-monospace, SFMono-Regular, Menlo, monospace;
  --glow: rgba(0,224,198,0.35);
}

* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  background: var(--bg-main);
  color: var(--text-main);
  font-family: 'PingFang SC', 'Microsoft YaHei', 'Noto Sans SC', system-ui, -apple-system, sans-serif;
  line-height: 1.65;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}
a { text-decoration: none; color: inherit; }
img { display: block; max-width: 100%; }
button, input, select, textarea { font: inherit; color: inherit; }

/* 背景网格层 */
.bg-grid-layer {
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  background:
    radial-gradient(ellipse at 12% 12%, rgba(0,224,198,0.09), transparent 42%),
    radial-gradient(ellipse at 82% 78%, transparent 0%, rgba(5,10,20,0.55) 100%),
    linear-gradient(rgba(0,224,198,0.025) 1px, transparent 1px),
    linear-gradient(90deg, rgba(0,224,198,0.025) 1px, transparent 1px);
  background-size: auto, auto, 52px 52px, 52px 52px;
}

/* 扫描线动画 */
.hero-scanline {
  position: relative;
  height: 1px;
  overflow: hidden;
  background: linear-gradient(90deg, transparent, rgba(0,224,198,0.55), transparent);
}
.hero-scanline::after {
  content: '';
  position: absolute;
  top: 0;
  left: -30%;
  width: 30%;
  height: 2px;
  background: linear-gradient(90deg, transparent, rgba(0,224,198,0.9), transparent);
  animation: scanMove 3.2s ease-in-out infinite;
}
@keyframes scanMove {
  0% { left: -30%; opacity: 0; }
  35% { opacity: 1; }
  100% { left: 110%; opacity: 0; }
}

/* 品牌发光圆点 */
.brand-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--primary);
  box-shadow: 0 0 16px var(--glow), 0 0 32px rgba(0,224,198,0.18);
  position: relative;
  flex-shrink: 0;
}
.brand-dot::after {
  content: '';
  position: absolute;
  inset: -4px;
  border-radius: 50%;
  border: 1px solid rgba(0,224,198,0.4);
  animation: dotPulse 2s infinite;
}
@keyframes dotPulse {
  0% { transform: scale(0.8); opacity: 1; }
  70% { transform: scale(1.6); opacity: 0; }
  100% { transform: scale(1.6); opacity: 0; }
}

/* 左侧导航 */
.nav-item {
  position: relative;
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 20px;
  color: var(--text-sub);
  font-size: 15px;
  letter-spacing: 0.02em;
  border-radius: 8px;
  transition: background .2s, color .2s;
}
.nav-item::before {
  content: '';
  position: absolute;
  left: 0;
  top: 50%;
  transform: translateY(-50%);
  width: 3px;
  height: 0;
  border-radius: 2px;
  background: var(--primary);
  transition: height .2s, background .2s;
}
.nav-item:hover {
  color: #fff;
  background: rgba(255,255,255,0.03);
}
.nav-item:hover::before {
  height: 16px;
}
.nav-item.active {
  color: #fff;
  font-weight: 600;
}
.nav-item.active::before {
  height: 22px;
  background: var(--orange);
}

/* 移动端抽屉 */
.mobile-drawer {
  position: fixed;
  inset: 0;
  z-index: 60;
  background: rgba(5,10,20,0.9);
  backdrop-filter: blur(18px);
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: 40px 48px;
  opacity: 0;
  pointer-events: none;
  transition: opacity .3s ease;
}
.mobile-drawer.open {
  opacity: 1;
  pointer-events: auto;
}
.mobile-drawer .nav-item {
  font-size: 24px;
  padding: 16px 0;
  color: rgba(230,237,246,0.72);
  border-radius: 0;
}
.mobile-drawer .nav-item::before {
  left: -24px;
}
.mobile-drawer .nav-item.active {
  color: #fff;
}
.mobile-drawer .nav-item:hover {
  background: transparent;
  color: #fff;
}

/* 移动端顶栏 */
.mobile-topbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: 64px;
  z-index: 50;
  background: rgba(10,17,32,0.9);
  border-bottom: 1px solid var(--border-light);
  backdrop-filter: blur(14px);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 20px;
}

/* 按钮 */
.btn-primary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  background: linear-gradient(135deg, #00E0C6, #00A6FF);
  color: var(--text-inverse);
  font-weight: 600;
  font-size: 15px;
  border-radius: 8px;
  padding: 12px 24px;
  transition: box-shadow .25s, transform .15s, background .25s;
  border: none;
  cursor: pointer;
  white-space: nowrap;
}
.btn-primary:hover {
  box-shadow: 0 0 24px rgba(0,224,198,0.35);
  transform: translateY(-1px);
}
.btn-primary:active {
  transform: scale(0.98);
  box-shadow: 0 0 10px rgba(0,224,198,0.2);
}

.btn-secondary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  background: transparent;
  border: 1px solid var(--primary);
  color: var(--primary);
  font-weight: 500;
  font-size: 15px;
  border-radius: 8px;
  padding: 12px 24px;
  transition: background .2s, transform .15s;
  cursor: pointer;
  white-space: nowrap;
}
.btn-secondary:hover {
  background: rgba(0,224,198,0.1);
}
.btn-secondary:active {
  transform: scale(0.98);
}

/* 玻璃卡片 */
.glass-card {
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: 16px;
  transition: transform .25s ease, border-color .25s ease, box-shadow .25s ease;
}
.glass-card:hover {
  transform: translateY(-3px);
  border-color: var(--primary);
  box-shadow: 0 0 30px rgba(0,224,198,0.12);
}

/* 标签 */
.badge {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  font-size: 12px;
  font-weight: 500;
  background: rgba(0,224,198,0.1);
  color: var(--primary);
  padding: 4px 10px;
  border-radius: 4px;
  line-height: 1.2;
}
.badge-orange {
  background: rgba(255,122,26,0.1);
  color: var(--orange);
}

/* 图片框 */
.img-frame {
  position: relative;
  overflow: hidden;
  border-radius: 12px;
  background: linear-gradient(135deg, rgba(0,224,198,0.06), rgba(0,166,255,0.12));
}
.img-frame img {
  transition: transform .5s ease;
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.img-frame:hover img {
  transform: scale(1.02);
}
.img-frame .overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, transparent 35%, rgba(5,10,20,0.78) 100%);
}

/* 图片渐入 */
.fade-in {
  animation: fadeIn .6s ease;
}
@keyframes fadeIn {
  from { opacity: 0; transform: translateY(8px); }
  to { opacity: 1; transform: translateY(0); }
}

/* 圆环图 */
.ring-data {
  position: relative;
  width: 112px;
  height: 112px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}
.ring-data-inner {
  width: 76px;
  height: 76px;
  border-radius: 50%;
  background: var(--bg-panel);
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 20px;
}

/* 分隔列表 */
.dot-list li {
  position: relative;
  padding-left: 20px;
  color: var(--text-sub);
  font-size: 14px;
  line-height: 1.7;
}
.dot-list li::before {
  content: '';
  position: absolute;
  left: 4px;
  top: 10px;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--primary);
}

/* FAQ */
.faq-q-title { margin: 0; }
.faq-btn {
  width: 100%;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  padding: 20px 28px;
  background: none;
  border: none;
  color: var(--text-main);
  font-weight: 600;
  font-size: 16px;
  cursor: pointer;
  text-align: left;
}
.faq-arrow {
  flex-shrink: 0;
  transition: transform .3s ease;
}
.faq-item.open .faq-arrow {
  transform: rotate(180deg);
}
.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height .35s ease;
}
.faq-item.open .faq-answer {
  max-height: 400px;
}
.faq-answer-inner {
  padding: 0 28px 24px;
  color: var(--text-sub);
  font-size: 15px;
  line-height: 1.8;
}
.faq-item {
  border: 1px solid var(--border-light);
  border-radius: 16px;
  background: rgba(255,255,255,0.03);
  transition: border-color .25s, box-shadow .25s;
}
.faq-item.open {
  border-color: var(--primary);
  box-shadow: 0 0 24px rgba(0,224,198,0.1);
}

/* 表单 */
.form-label {
  display: block;
  font-size: 14px;
  color: var(--text-sub);
  margin-bottom: 8px;
}
.form-control {
  width: 100%;
  background: rgba(10,17,32,0.65);
  border: 1px solid rgba(255,255,255,0.12);
  border-radius: 8px;
  padding: 12px 16px;
  color: var(--text-main);
  transition: border-color .2s, box-shadow .2s;
  outline: none;
}
.form-control:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(0,224,198,0.12);
}
.form-control::placeholder {
  color: rgba(147,165,180,0.6);
}
select.form-control {
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' fill='none' stroke='%2393A5B4' stroke-width='1.5'%3E%3Cpath d='m4 6 4 4 4-4'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 14px center;
  padding-right: 40px;
}

/* 截断两行 */
.clamp-2 {
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

/* 页脚 */
.site-footer {
  background: #050A14;
  border-top: 1px solid rgba(0,224,198,0.15);
}
.footer-link {
  color: rgba(147,165,180,0.8);
  font-size: 14px;
  transition: color .2s;
}
.footer-link:hover {
  color: var(--primary);
}

/* 通用section标题辅助样式 */
.section-kicker {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--primary);
  margin-bottom: 14px;
}
.section-kicker::before {
  content: '';
  width: 22px;
  height: 1px;
  background: var(--primary);
}

/* CTA斜角 */
.cta-strip {
  position: relative;
  background:
    linear-gradient(135deg, rgba(0,224,198,0.14), rgba(0,166,255,0.08)),
    url('/assets/images/backpic/back-2.webp') center / cover no-repeat;
  border-radius: 16px;
  overflow: hidden;
  clip-path: polygon(0 0, calc(100% - 8px) 0, 100% 8px, 100% 100%, 8px 100%, 0 calc(100% - 8px));
}
.cta-strip::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(90deg, rgba(5,10,20,0.82) 20%, rgba(10,17,32,0.6) 70%, rgba(10,17,32,0.35));
  pointer-events: none;
}
.cta-strip > * {
  position: relative;
  z-index: 1;
}

/* 响应式 */
@media (min-width: 1024px) {
  .mobile-topbar { display: none; }
  .mobile-drawer { display: none; }
}
@media (max-width: 1023px) {
  .sidebar { display: none; }
}
@media (max-width: 640px) {
  .hero-section { padding-top: 64px; }
}

/* roulang page: article */
:root {
    --bg-primary: #0A1120;
    --bg-secondary: #101B31;
    --card-bg: rgba(255,255,255,0.045);
    --card-border: rgba(255,255,255,0.09);
    --primary: #00E0C6;
    --secondary: #00A6FF;
    --accent: #FF7A1A;
    --text-main: #E6EDF6;
    --text-sub: #93A5B4;
    --text-inverse: #07111F;
    --radius-card: 16px;
    --radius-btn: 8px;
    --radius-tag: 4px;
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'PingFang SC', 'Microsoft YaHei', 'Noto Sans SC', -apple-system, sans-serif;
    background: var(--bg-primary);
    color: var(--text-main);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    position: relative;
    overflow-x: hidden;
}

body::before {
    content: '';
    position: fixed;
    inset: 0;
    background-image: radial-gradient(rgba(0, 224, 198, 0.05) 1px, transparent 1px);
    background-size: 32px 32px;
    pointer-events: none;
    z-index: 0;
}

body::after {
    content: '';
    position: fixed;
    top: -180px;
    left: -180px;
    width: 420px;
    height: 420px;
    background: radial-gradient(circle, rgba(0, 224, 198, 0.12) 0%, transparent 70%);
    pointer-events: none;
    z-index: 0;
}

.container {
    max-width: 1180px;
    margin: 0 auto;
    padding: 0 24px;
    position: relative;
    z-index: 1;
}

a {
    text-decoration: none;
    color: inherit;
}

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

/* ===== 左侧导航 ===== */
.site-sidebar {
    position: fixed;
    left: 0;
    top: 0;
    bottom: 0;
    width: 248px;
    background: rgba(7, 13, 26, 0.92);
    backdrop-filter: blur(12px);
    border-right: 1px solid rgba(255, 255, 255, 0.06);
    z-index: 50;
    display: flex;
    flex-direction: column;
    padding: 32px 22px;
    transition: transform 0.3s ease;
}

.sidebar-brand {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 40px;
    padding: 0 8px;
}

.brand-dot {
    width: 34px;
    height: 34px;
    border-radius: 8px;
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    box-shadow: 0 0 24px rgba(0, 224, 198, 0.45);
    position: relative;
    flex-shrink: 0;
}

.brand-dot::after {
    content: '';
    position: absolute;
    inset: 7px;
    border-radius: 4px;
    background: var(--bg-primary);
}

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

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

.nav-item {
    display: flex;
    align-items: center;
    padding: 11px 14px;
    color: var(--text-sub);
    border-left: 3px solid transparent;
    border-radius: 0 8px 8px 0;
    font-size: 15px;
    font-weight: 500;
    transition: all 0.2s ease;
    letter-spacing: 0.01em;
}

.nav-item:hover {
    color: #fff;
    border-left-color: var(--primary);
    background: rgba(255, 255, 255, 0.02);
}

.nav-item.active {
    color: #fff;
    border-left-color: var(--accent);
    background: rgba(255, 122, 26, 0.06);
}

.sidebar-foot {
    padding: 18px 8px 4px;
    border-top: 1px solid rgba(255, 255, 255, 0.05);
    font-size: 12px;
    color: rgba(255, 255, 255, 0.28);
    line-height: 1.8;
}

.sidebar-foot a {
    color: rgba(255, 255, 255, 0.28);
    transition: color 0.2s;
}

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

/* ===== 主内容区 ===== */
.main-wrapper {
    margin-left: 248px;
    position: relative;
    z-index: 1;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* ===== 移动端导航 ===== */
.mobile-header {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: 60px;
    background: rgba(7, 13, 26, 0.94);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid rgba(255, 255, 255, 0.06);
    z-index: 60;
    align-items: center;
    justify-content: space-between;
    padding: 0 20px;
}

.mobile-brand {
    display: flex;
    align-items: center;
    gap: 10px;
}

.mobile-brand .brand-dot {
    width: 26px;
    height: 26px;
    border-radius: 6px;
}

.mobile-brand-text {
    font-weight: 700;
    font-size: 16px;
    color: #fff;
}

.hamburger {
    width: 42px;
    height: 42px;
    border-radius: 8px;
    border: 1px solid rgba(255, 255, 255, 0.12);
    background: rgba(255, 255, 255, 0.04);
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all 0.2s;
}

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

.hamburger svg {
    width: 20px;
    height: 20px;
    stroke: var(--text-main);
}

.mobile-drawer {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(5, 10, 20, 0.96);
    backdrop-filter: blur(16px);
    z-index: 70;
    padding: 88px 32px 40px;
    flex-direction: column;
    gap: 8px;
}

.mobile-drawer.open {
    display: flex;
}

.drawer-close {
    position: absolute;
    top: 16px;
    right: 20px;
    width: 42px;
    height: 42px;
    border-radius: 8px;
    border: 1px solid rgba(255, 255, 255, 0.12);
    background: rgba(255, 255, 255, 0.04);
    color: var(--text-main);
    font-size: 22px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
}

.drawer-item {
    padding: 16px 20px;
    font-size: 20px;
    font-weight: 600;
    color: var(--text-sub);
    border-left: 3px solid transparent;
    border-radius: 0 12px 12px 0;
    transition: all 0.2s;
}

.drawer-item:hover {
    color: #fff;
    border-left-color: var(--primary);
    background: rgba(255, 255, 255, 0.03);
}

.drawer-item.active {
    color: #fff;
    border-left-color: var(--accent);
    background: rgba(255, 122, 26, 0.06);
}

/* ===== 文章 Hero ===== */
.article-hero {
    position: relative;
    padding: 64px 0 56px;
    background: linear-gradient(135deg, rgba(10, 17, 32, 0.92), rgba(7, 13, 26, 0.78)), url('/assets/images/backpic/back-2.webp') center/cover no-repeat;
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
    overflow: hidden;
}

.article-hero::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: linear-gradient(90deg, transparent, var(--primary), transparent);
    opacity: 0.7;
}

.breadcrumb {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 13px;
    color: rgba(255, 255, 255, 0.45);
    margin-bottom: 24px;
    flex-wrap: wrap;
}

.breadcrumb a {
    color: rgba(0, 224, 198, 0.85);
    transition: color 0.2s;
}

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

.breadcrumb .sep {
    color: rgba(255, 255, 255, 0.25);
}

.article-hero h1 {
    font-size: clamp(26px, 3.6vw, 36px);
    line-height: 1.4;
    font-weight: 700;
    letter-spacing: 0.01em;
    max-width: 820px;
    color: #fff;
    margin-bottom: 20px;
}

.article-meta {
    display: flex;
    align-items: center;
    gap: 12px;
    flex-wrap: wrap;
}

.meta-badge {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    font-size: 13px;
    padding: 6px 14px;
    border-radius: var(--radius-tag);
    background: rgba(255, 255, 255, 0.04);
    border: 1px solid rgba(255, 255, 255, 0.08);
    color: var(--text-sub);
}

.meta-badge.highlight {
    background: rgba(0, 224, 198, 0.08);
    border-color: rgba(0, 224, 198, 0.25);
    color: var(--primary);
}

/* ===== 主内容 ===== */
.main-content {
    padding: 56px 24px 72px;
    flex: 1;
}

.article-body-wrap {
    max-width: 820px;
}

/* ===== 正文排版 ===== */
.article-content {
    color: var(--text-main);
}

.article-content h2 {
    font-size: 28px;
    line-height: 1.4;
    font-weight: 700;
    margin: 48px 0 20px;
    padding-left: 16px;
    border-left: 4px solid var(--primary);
    letter-spacing: 0.01em;
}

.article-content h3 {
    font-size: 22px;
    line-height: 1.5;
    font-weight: 600;
    margin: 36px 0 16px;
    color: #fff;
}

.article-content p {
    font-size: 16px;
    line-height: 1.9;
    color: rgba(230, 237, 246, 0.88);
    margin: 20px 0;
}

.article-content ul,
.article-content ol {
    margin: 20px 0;
    padding-left: 24px;
    color: rgba(230, 237, 246, 0.88);
    line-height: 1.9;
}

.article-content li {
    margin: 8px 0;
}

.article-content blockquote {
    margin: 28px 0;
    padding: 20px 24px;
    border-left: 3px solid var(--primary);
    background: rgba(0, 224, 198, 0.05);
    border-radius: 0 12px 12px 0;
    color: rgba(230, 237, 246, 0.82);
    line-height: 1.8;
}

.article-content code {
    font-family: 'Roboto Mono', 'DIN Alternate', monospace;
    background: rgba(0, 166, 255, 0.1);
    color: var(--secondary);
    padding: 2px 8px;
    border-radius: 4px;
    font-size: 14px;
}

.article-content pre {
    background: #060C17;
    border: 1px solid rgba(255, 255, 255, 0.08);
    border-radius: 12px;
    padding: 24px;
    overflow-x: auto;
    margin: 28px 0;
}

.article-content pre code {
    background: transparent;
    padding: 0;
    color: #E6EDF6;
    line-height: 1.7;
}

.article-content img {
    border-radius: 12px;
    margin: 28px 0;
    border: 1px solid rgba(255, 255, 255, 0.08);
}

.article-content a {
    color: var(--primary);
    border-bottom: 1px solid rgba(0, 224, 198, 0.3);
    transition: border-color 0.2s;
}

.article-content a:hover {
    border-bottom-color: var(--primary);
}

.article-content table {
    width: 100%;
    border-collapse: collapse;
    margin: 28px 0;
    font-size: 15px;
}

.article-content table th,
.article-content table td {
    padding: 12px 16px;
    border: 1px solid rgba(255, 255, 255, 0.08);
    text-align: left;
}

.article-content table th {
    background: rgba(255, 255, 255, 0.04);
    font-weight: 600;
    color: #fff;
}

/* ===== 无内容 ===== */
.not-found {
    padding: 64px 32px;
    text-align: center;
    border: 1px dashed rgba(0, 224, 198, 0.25);
    border-radius: var(--radius-card);
    background: rgba(255, 255, 255, 0.02);
}

.not-found p {
    font-size: 20px;
    color: var(--text-sub);
    margin-bottom: 24px;
}

/* ===== 按钮 ===== */
.btn-primary {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 14px 30px;
    border-radius: var(--radius-btn);
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    color: var(--text-inverse);
    font-weight: 600;
    font-size: 15px;
    border: none;
    cursor: pointer;
    transition: all 0.3s ease;
    line-height: 1;
}

.btn-primary:hover {
    box-shadow: 0 0 30px rgba(0, 224, 198, 0.35), 0 4px 20px rgba(0, 166, 255, 0.15);
    transform: translateY(-2px);
}

.btn-primary:active {
    transform: scale(0.98);
}

.btn-outline {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 13px 28px;
    border-radius: var(--radius-btn);
    border: 1px solid var(--primary);
    color: var(--primary);
    font-weight: 600;
    font-size: 15px;
    cursor: pointer;
    background: transparent;
    transition: all 0.3s ease;
    line-height: 1;
}

.btn-outline:hover {
    background: rgba(0, 224, 198, 0.1);
    box-shadow: 0 0 20px rgba(0, 224, 198, 0.15);
    transform: translateY(-1px);
}

.btn-outline:active {
    transform: scale(0.98);
}

/* ===== 上一篇/下一篇 ===== */
.article-pagination {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
    margin-top: 56px;
    padding-top: 36px;
    border-top: 1px solid rgba(255, 255, 255, 0.06);
}

.pagination-link {
    display: flex;
    flex-direction: column;
    gap: 6px;
    padding: 22px 24px;
    border-radius: var(--radius-card);
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    transition: all 0.3s ease;
}

.pagination-link:hover {
    border-color: rgba(0, 224, 198, 0.45);
    box-shadow: 0 0 30px rgba(0, 224, 198, 0.1);
    transform: translateY(-2px);
}

.pagination-link .label {
    font-size: 12px;
    color: var(--text-sub);
    text-transform: uppercase;
    letter-spacing: 0.08em;
}

.pagination-link .title {
    font-size: 16px;
    font-weight: 600;
    color: var(--text-main);
}

.pagination-link.text-right {
    text-align: right;
    align-items: flex-end;
}

/* ===== 相关推荐 ===== */
.related-section {
    margin-top: 64px;
}

.related-section h3 {
    font-size: 22px;
    font-weight: 700;
    margin-bottom: 24px;
    color: #fff;
    display: flex;
    align-items: center;
    gap: 12px;
}

.related-section h3::before {
    content: '';
    width: 4px;
    height: 20px;
    border-radius: 2px;
    background: linear-gradient(180deg, var(--primary), var(--secondary));
}

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

.related-card {
    border-radius: var(--radius-card);
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    overflow: hidden;
    transition: all 0.3s ease;
    display: flex;
    flex-direction: column;
}

.related-card:hover {
    border-color: rgba(0, 224, 198, 0.45);
    box-shadow: 0 0 30px rgba(0, 224, 198, 0.12);
    transform: translateY(-3px);
}

.related-card .img-wrap {
    position: relative;
    aspect-ratio: 16 / 9;
    overflow: hidden;
    background: #07111F;
}

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

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

.related-card .card-body {
    padding: 20px 20px 24px;
    display: flex;
    flex-direction: column;
    gap: 10px;
    flex: 1;
}

.related-card .card-tag {
    display: inline-block;
    font-size: 12px;
    padding: 4px 10px;
    border-radius: var(--radius-tag);
    background: rgba(0, 224, 198, 0.08);
    color: var(--primary);
    width: fit-content;
}

.related-card h4 {
    font-size: 17px;
    font-weight: 600;
    color: var(--text-main);
    line-height: 1.5;
}

.related-card p {
    font-size: 14px;
    color: var(--text-sub);
    line-height: 1.7;
    flex: 1;
}

.related-card .card-link {
    font-size: 14px;
    color: var(--primary);
    display: flex;
    align-items: center;
    gap: 6px;
    transition: gap 0.2s;
}

.related-card .card-link:hover {
    gap: 10px;
}

/* ===== CTA 横条 ===== */
.cta-section {
    margin-top: 72px;
    position: relative;
    border-radius: var(--radius-card);
    background: linear-gradient(105deg, rgba(0, 224, 198, 0.08), rgba(0, 166, 255, 0.05)), rgba(16, 27, 49, 0.6);
    border: 1px solid rgba(0, 224, 198, 0.16);
    padding: 48px 56px;
    overflow: hidden;
    clip-path: polygon(0 0, calc(100% - 24px) 0, 100% 24px, 100% 100%, 24px 100%, 0 calc(100% - 24px));
}

.cta-section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: linear-gradient(90deg, transparent, rgba(0, 224, 198, 0.5), transparent);
}

.cta-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 32px;
    flex-wrap: wrap;
}

.cta-inner h3 {
    font-size: 24px;
    font-weight: 700;
    color: #fff;
    line-height: 1.4;
    margin-bottom: 8px;
}

.cta-inner p {
    font-size: 15px;
    color: var(--text-sub);
}

/* ===== 页脚 ===== */
.site-footer {
    background: #050A14;
    border-top: 1px solid rgba(0, 224, 198, 0.12);
    position: relative;
    z-index: 1;
}

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

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

/* ===== 响应式 ===== */
@media (max-width: 1023px) {
    .site-sidebar {
        display: none;
    }
    .mobile-header {
        display: flex;
    }
    .main-wrapper {
        margin-left: 0;
    }
    .article-hero {
        padding-top: 84px;
    }
    .related-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    .main-content {
        padding: 40px 20px 56px;
    }
}

@media (max-width: 767px) {
    .related-grid {
        grid-template-columns: 1fr;
    }
    .article-pagination {
        grid-template-columns: 1fr;
    }
    .cta-section {
        padding: 32px 24px;
    }
    .cta-inner {
        flex-direction: column;
        align-items: flex-start;
    }
    .btn-primary,
    .btn-outline {
        width: 100%;
    }
    .article-hero h1 {
        font-size: 24px;
    }
    .main-content {
        padding: 32px 16px 48px;
    }
    .container {
        padding: 0 16px;
    }
    .article-meta {
        gap: 8px;
    }
    .meta-badge {
        font-size: 12px;
        padding: 5px 10px;
    }
}

@media (max-width: 480px) {
    .breadcrumb {
        font-size: 12px;
    }
    .related-grid {
        grid-template-columns: 1fr;
    }
    .article-hero {
        padding: 68px 0 40px;
    }
    .article-hero h1 {
        font-size: 22px;
        line-height: 1.5;
    }
}

/* roulang page: category1 */
:root {
      --bg-primary: #0A1120;
      --bg-secondary: #101B31;
      --bg-card: rgba(255, 255, 255, 0.045);
      --border-card: rgba(255, 255, 255, 0.09);
      --accent-cyan: #00E0C6;
      --accent-blue: #00A6FF;
      --accent-orange: #FF7A1A;
      --text-primary: #E6EDF6;
      --text-secondary: #93A5B4;
      --text-inverse: #07111F;
      --radius-card: 16px;
      --radius-btn: 8px;
      --radius-tag: 4px;
      --shadow-glow: 0 0 30px rgba(0, 224, 198, 0.12);
      --font-mono: 'Roboto Mono', 'DIN Alternate', ui-monospace, monospace;
    }

    * { box-sizing: border-box; margin: 0; padding: 0; }
    html { scroll-behavior: smooth; }
    body {
      font-family: 'PingFang SC', 'Microsoft YaHei', 'Noto Sans SC', -apple-system, sans-serif;
      background-color: var(--bg-primary);
      color: var(--text-primary);
      line-height: 1.6;
      background-image:
        radial-gradient(circle at 15% 15%, rgba(0, 224, 198, 0.07) 0%, transparent 40%),
        radial-gradient(circle at 85% 90%, rgba(0, 166, 255, 0.05) 0%, transparent 40%),
        linear-gradient(180deg, #0A1120 0%, #050A14 100%);
      background-attachment: fixed;
      min-height: 100vh;
    }
    body::before {
      content: '';
      position: fixed;
      inset: 0;
      background-image:
        linear-gradient(rgba(255, 255, 255, 0.02) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255, 255, 255, 0.02) 1px, transparent 1px);
      background-size: 48px 48px;
      z-index: 0;
      pointer-events: none;
    }
    a { text-decoration: none; color: inherit; }
    img { max-width: 100%; display: block; }
    button { cursor: pointer; border: none; background: none; font-family: inherit; }

    ::selection { background: rgba(0, 224, 198, 0.25); color: #fff; }

    .site-sidebar {
      position: fixed;
      top: 0;
      left: 0;
      width: 248px;
      height: 100vh;
      background: rgba(8, 14, 26, 0.95);
      border-right: 1px solid rgba(255, 255, 255, 0.06);
      padding: 32px 20px;
      display: flex;
      flex-direction: column;
      z-index: 50;
      backdrop-filter: blur(12px);
    }
    .brand-dot {
      width: 10px;
      height: 10px;
      border-radius: 50%;
      background: var(--accent-cyan);
      box-shadow: 0 0 12px rgba(0, 224, 198, 0.6);
      flex-shrink: 0;
      display: inline-block;
    }
    .nav-item {
      display: flex;
      align-items: center;
      gap: 12px;
      padding: 12px 16px;
      border-radius: 8px;
      font-size: 15px;
      color: var(--text-secondary);
      border-left: 3px solid transparent;
      transition: all 0.25s;
      position: relative;
    }
    .nav-item:hover {
      color: #fff;
      background: rgba(255, 255, 255, 0.04);
      border-left-color: var(--accent-cyan);
    }
    .nav-item.active {
      color: #fff;
      background: rgba(0, 224, 198, 0.08);
      border-left-color: var(--accent-orange);
      font-weight: 600;
    }
    .nav-item.active::after {
      content: '';
      position: absolute;
      right: 14px;
      width: 6px;
      height: 6px;
      border-radius: 50%;
      background: var(--accent-orange);
      box-shadow: 0 0 8px rgba(255, 122, 26, 0.5);
    }
    .sidebar-foot {
      margin-top: auto;
      padding-top: 24px;
      border-top: 1px solid rgba(255, 255, 255, 0.05);
      font-size: 12px;
      color: rgba(255, 255, 255, 0.35);
      line-height: 1.8;
    }

    .mobile-header {
      display: none;
      position: fixed;
      top: 0;
      left: 0;
      right: 0;
      height: 60px;
      background: rgba(8, 14, 26, 0.92);
      backdrop-filter: blur(14px);
      border-bottom: 1px solid rgba(255, 255, 255, 0.06);
      z-index: 100;
      padding: 0 20px;
      align-items: center;
      justify-content: space-between;
    }
    .menu-toggle {
      width: 40px;
      height: 40px;
      display: flex;
      align-items: center;
      justify-content: center;
      border-radius: 8px;
      color: var(--text-primary);
      transition: background 0.2s;
    }
    .menu-toggle:hover { background: rgba(255, 255, 255, 0.06); }
    .mobile-drawer {
      position: fixed;
      top: 0;
      left: 0;
      right: 0;
      bottom: 0;
      background: rgba(8, 14, 26, 0.96);
      z-index: 200;
      padding-top: 100px;
      display: none;
      backdrop-filter: blur(20px);
    }
    .mobile-drawer.open { display: flex; flex-direction: column; }
    .drawer-link {
      font-size: 22px;
      padding: 18px 48px;
      color: var(--text-secondary);
      border-left: 3px solid transparent;
      transition: all 0.25s;
    }
    .drawer-link:hover { color: #fff; border-left-color: var(--accent-cyan); background: rgba(0, 224, 198, 0.05); }
    .drawer-link.active { color: #fff; border-left-color: var(--accent-orange); font-weight: 600; }
    .drawer-close {
      position: absolute;
      top: 18px;
      right: 20px;
      width: 40px;
      height: 40px;
      display: flex;
      align-items: center;
      justify-content: center;
      border-radius: 8px;
      color: var(--text-primary);
      font-size: 24px;
      transition: background 0.2s;
    }
    .drawer-close:hover { background: rgba(255, 255, 255, 0.08); }

    .site-main {
      margin-left: 248px;
      min-height: 100vh;
      position: relative;
      z-index: 1;
    }
    .page-container {
      max-width: 1180px;
      margin: 0 auto;
      padding: 0 32px;
    }

    .breadcrumb {
      display: flex;
      align-items: center;
      gap: 8px;
      font-size: 13px;
      color: var(--text-secondary);
      margin-bottom: 28px;
    }
    .breadcrumb a { color: var(--text-secondary); transition: color 0.2s; }
    .breadcrumb a:hover { color: var(--accent-cyan); }
    .breadcrumb span { color: var(--text-primary); }

    .hero-tag {
      display: inline-block;
      padding: 4px 12px;
      background: rgba(0, 224, 198, 0.1);
      border: 1px solid rgba(0, 224, 198, 0.25);
      border-radius: 4px;
      color: var(--accent-cyan);
      font-size: 12px;
      letter-spacing: 0.06em;
      font-weight: 500;
      margin-bottom: 16px;
    }
    h1 {
      font-size: 44px;
      line-height: 1.2;
      font-weight: 700;
      letter-spacing: -0.02em;
      margin-bottom: 20px;
      background: linear-gradient(135deg, #fff, rgba(255, 255, 255, 0.75));
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
    }
    .hero-sub {
      font-size: 17px;
      line-height: 1.8;
      color: var(--text-secondary);
      max-width: 520px;
      margin-bottom: 32px;
    }

    .btn-primary {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 8px;
      padding: 13px 28px;
      border-radius: 8px;
      background: linear-gradient(135deg, var(--accent-cyan), var(--accent-blue));
      color: #07111F;
      font-weight: 600;
      font-size: 15px;
      transition: all 0.25s;
      box-shadow: 0 4px 20px rgba(0, 224, 198, 0.2);
      border: none;
    }
    .btn-primary:hover {
      transform: translateY(-1px);
      box-shadow: 0 6px 30px rgba(0, 224, 198, 0.35);
    }
    .btn-primary:active { transform: scale(0.98); }

    .btn-secondary {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 8px;
      padding: 13px 28px;
      border-radius: 8px;
      border: 1px solid rgba(0, 224, 198, 0.4);
      color: var(--accent-cyan);
      font-weight: 500;
      font-size: 15px;
      background: transparent;
      transition: all 0.25s;
    }
    .btn-secondary:hover {
      background: rgba(0, 224, 198, 0.08);
      border-color: var(--accent-cyan);
    }
    .btn-secondary:active { transform: scale(0.98); }

    .hero-img-wrap {
      position: relative;
      border-radius: 16px;
      overflow: hidden;
      border: 1px solid rgba(255, 255, 255, 0.08);
      aspect-ratio: 16/9;
      background: var(--bg-secondary);
    }
    .hero-img-wrap::before {
      content: '';
      position: absolute;
      inset: 0;
      background: linear-gradient(135deg, rgba(0, 224, 198, 0.12), rgba(0, 166, 255, 0.04));
      z-index: 1;
      pointer-events: none;
    }
    .hero-img-wrap img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      transition: transform 0.4s;
    }
    .hero-img-wrap:hover img { transform: scale(1.02); }
    .hero-scanline {
      height: 1px;
      background: linear-gradient(90deg, transparent, rgba(0, 224, 198, 0.6), transparent);
      position: relative;
      overflow: hidden;
      margin-top: 48px;
    }
    .hero-scanline::after {
      content: '';
      position: absolute;
      width: 80px;
      height: 1px;
      background: var(--accent-cyan);
      top: 0;
      animation: scan 4s linear infinite;
    }
    @keyframes scan {
      0% { left: -80px; opacity: 0; }
      20% { opacity: 1; }
      100% { left: 100%; opacity: 0; }
    }

    .section-label {
      display: inline-block;
      font-size: 12px;
      font-weight: 600;
      letter-spacing: 0.1em;
      text-transform: uppercase;
      color: var(--accent-cyan);
      margin-bottom: 12px;
    }
    h2 {
      font-size: 32px;
      line-height: 1.3;
      font-weight: 700;
      letter-spacing: -0.02em;
      color: #fff;
      margin-bottom: 14px;
    }
    .section-sub {
      font-size: 16px;
      line-height: 1.7;
      color: var(--text-secondary);
      max-width: 640px;
    }

    .glass-card {
      background: var(--bg-card);
      border: 1px solid var(--border-card);
      border-radius: 16px;
      padding: 28px;
      transition: all 0.3s;
      position: relative;
      overflow: hidden;
    }
    .glass-card:hover {
      transform: translateY(-3px);
      border-color: rgba(0, 224, 198, 0.4);
      box-shadow: var(--shadow-glow);
    }

    .product-card-img {
      border-radius: 12px;
      overflow: hidden;
      aspect-ratio: 16/9;
      margin-bottom: 20px;
      position: relative;
      background: var(--bg-secondary);
    }
    .product-card-img img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      transition: transform 0.4s;
      opacity: 0.92;
    }
    .product-card-img:hover img { transform: scale(1.04); opacity: 1; }
    .product-card-img::after {
      content: '';
      position: absolute;
      inset: 0;
      background: linear-gradient(180deg, transparent 60%, rgba(0, 0, 0, 0.35) 100%);
      pointer-events: none;
    }

    .badge {
      display: inline-block;
      padding: 3px 10px;
      border-radius: 4px;
      font-size: 12px;
      font-weight: 500;
    }
    .badge-cyan {
      background: rgba(0, 224, 198, 0.1);
      color: var(--accent-cyan);
      border: 1px solid rgba(0, 224, 198, 0.2);
    }
    .badge-orange {
      background: rgba(255, 122, 26, 0.1);
      color: var(--accent-orange);
      border: 1px solid rgba(255, 122, 26, 0.2);
    }

    .card-link {
      display: inline-flex;
      align-items: center;
      gap: 6px;
      color: var(--accent-cyan);
      font-size: 14px;
      font-weight: 500;
      transition: gap 0.2s;
    }
    .card-link:hover { gap: 10px; }

    .stat-card {
      background: rgba(255, 255, 255, 0.025);
      border: 1px solid rgba(255, 255, 255, 0.06);
      border-radius: 16px;
      padding: 28px 24px;
      text-align: center;
      transition: all 0.3s;
    }
    .stat-card:hover {
      border-color: rgba(0, 224, 198, 0.3);
      box-shadow: 0 0 24px rgba(0, 224, 198, 0.08);
    }
    .stat-number {
      font-family: var(--font-mono);
      font-size: 36px;
      font-weight: 700;
      color: var(--accent-cyan);
      line-height: 1.1;
      margin-bottom: 8px;
    }
    .stat-number.orange { color: var(--accent-orange); }
    .stat-label {
      font-size: 14px;
      color: var(--text-secondary);
    }

    .scene-card {
      background: rgba(255, 255, 255, 0.025);
      border: 1px solid rgba(255, 255, 255, 0.06);
      border-radius: 16px;
      padding: 24px;
      transition: all 0.3s;
      display: flex;
      gap: 18px;
      align-items: flex-start;
    }
    .scene-card:hover {
      border-color: rgba(0, 166, 255, 0.3);
      background: rgba(0, 166, 255, 0.04);
    }
    .scene-icon {
      width: 48px;
      height: 48px;
      border-radius: 12px;
      display: flex;
      align-items: center;
      justify-content: center;
      flex-shrink: 0;
      background: rgba(0, 224, 198, 0.1);
      border: 1px solid rgba(0, 224, 198, 0.2);
      color: var(--accent-cyan);
    }

    .steps-flow {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 24px;
      position: relative;
    }
    .step-item {
      position: relative;
      padding: 28px 20px;
      background: rgba(255, 255, 255, 0.025);
      border: 1px solid rgba(255, 255, 255, 0.06);
      border-radius: 16px;
      text-align: center;
      transition: all 0.3s;
    }
    .step-item:hover {
      border-color: rgba(0, 224, 198, 0.3);
      transform: translateY(-2px);
    }
    .step-num {
      font-family: var(--font-mono);
      font-size: 28px;
      font-weight: 700;
      color: rgba(0, 224, 198, 0.5);
      margin-bottom: 10px;
      line-height: 1;
    }
    .step-item h3 {
      font-size: 16px;
      font-weight: 600;
      color: #fff;
      margin-bottom: 8px;
    }
    .step-item p {
      font-size: 13px;
      color: var(--text-secondary);
      line-height: 1.6;
    }
    .step-item::after {
      content: '→';
      position: absolute;
      right: -18px;
      top: 50%;
      transform: translateY(-50%);
      color: rgba(0, 224, 198, 0.4);
      font-size: 20px;
      font-family: var(--font-mono);
      z-index: 1;
    }
    .step-item:last-child::after { display: none; }

    .faq-item {
      background: rgba(255, 255, 255, 0.025);
      border: 1px solid rgba(255, 255, 255, 0.06);
      border-radius: 12px;
      padding: 0;
      margin-bottom: 12px;
      transition: all 0.3s;
      overflow: hidden;
    }
    .faq-item.open {
      border-color: rgba(0, 224, 198, 0.4);
      box-shadow: var(--shadow-glow);
    }
    .faq-question {
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 16px;
      padding: 20px 24px;
      cursor: pointer;
      font-size: 16px;
      font-weight: 500;
      color: var(--text-primary);
      transition: color 0.2s;
    }
    .faq-question:hover { color: var(--accent-cyan); }
    .faq-icon {
      width: 24px;
      height: 24px;
      flex-shrink: 0;
      display: flex;
      align-items: center;
      justify-content: center;
      border-radius: 50%;
      background: rgba(0, 224, 198, 0.1);
      color: var(--accent-cyan);
      transition: transform 0.3s;
      font-size: 14px;
    }
    .faq-item.open .faq-icon { transform: rotate(180deg); }
    .faq-answer {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.35s ease;
    }
    .faq-item.open .faq-answer { max-height: 300px; }
    .faq-answer-inner {
      padding: 0 24px 20px;
      font-size: 14px;
      line-height: 1.8;
      color: var(--text-secondary);
      border-top: 1px solid rgba(255, 255, 255, 0.04);
      padding-top: 16px;
    }

    .cta-bar {
      border-radius: 20px;
      background: linear-gradient(135deg, rgba(0, 224, 198, 0.1), rgba(0, 166, 255, 0.05)), var(--bg-secondary);
      border: 1px solid rgba(0, 224, 198, 0.2);
      padding: 48px 40px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 32px;
      position: relative;
      overflow: hidden;
    }
    .cta-bar::after {
      content: '';
      position: absolute;
      right: -30px;
      top: -30px;
      width: 160px;
      height: 160px;
      border-radius: 50%;
      background: rgba(0, 224, 198, 0.06);
      pointer-events: none;
    }
    .cta-bar h2 {
      margin-bottom: 8px;
      font-size: 28px;
    }
    .cta-bar p {
      color: var(--text-secondary);
      font-size: 15px;
      line-height: 1.6;
      max-width: 480px;
    }

    .site-footer {
      margin-left: 248px;
      background: rgba(5, 10, 20, 0.95);
      border-top: 1px solid rgba(0, 224, 198, 0.15);
      position: relative;
      z-index: 1;
    }
    .footer-link {
      color: var(--text-secondary);
      font-size: 14px;
      transition: color 0.2s;
    }
    .footer-link:hover { color: var(--accent-cyan); }

    .img-loading {
      background: linear-gradient(110deg, #0a1628 30%, #101e36 40%, #0a1628 50%);
      background-size: 200% 100%;
      animation: loadingShimmer 1.5s infinite;
    }
    @keyframes loadingShimmer {
      0% { background-position: 200% 0; }
      100% { background-position: -200% 0; }
    }
    img.loaded { animation: fadeIn 0.4s ease; }
    @keyframes fadeIn {
      from { opacity: 0; }
      to { opacity: 1; }
    }

    @media (max-width: 1199px) {
      .steps-flow { gap: 16px; }
      .step-item::after { content: none; }
    }
    @media (max-width: 1023px) {
      .site-sidebar { display: none; }
      .site-main { margin-left: 0; }
      .site-footer { margin-left: 0; }
      .mobile-header { display: flex; }
      .page-container { padding: 0 24px; }
      h1 { font-size: 36px; }
      h2 { font-size: 28px; }
      .steps-flow { grid-template-columns: repeat(2, 1fr); }
      .cta-bar { flex-direction: column; text-align: center; padding: 36px 24px; }
      .cta-bar p { margin: 0 auto; }
    }
    @media (max-width: 767px) {
      .page-container { padding: 0 16px; }
      h1 { font-size: 30px; line-height: 1.25; }
      .hero-sub { font-size: 15px; }
      .steps-flow { grid-template-columns: 1fr; }
      .product-card-img { aspect-ratio: 16/10; }
      .section-label { font-size: 11px; }
    }
    @media (max-width: 520px) {
      .btn-primary, .btn-secondary { width: 100%; }
      .hero-cta { flex-direction: column; }
      .cta-bar { padding: 28px 20px; }
    }

    @media (min-width: 1024px) {
      .mobile-header { display: none; }
      .mobile-drawer { display: none !important; }
    }

/* roulang page: category2 */
:root {
            --bg-primary: #0A1120;
            --bg-secondary: #101B31;
            --card-bg: rgba(255, 255, 255, 0.045);
            --card-border: rgba(255, 255, 255, 0.09);
            --accent-cyan: #00E0C6;
            --accent-blue: #00A6FF;
            --accent-orange: #FF7A1A;
            --text-primary: #E6EDF6;
            --text-muted: #93A5B4;
            --text-inverse: #07111F;
            --radius-card: 16px;
            --radius-btn: 8px;
            --radius-tag: 4px;
            --shadow-glow: 0 0 30px rgba(0, 224, 198, 0.12);
            --btn-glow: rgba(0, 224, 198, 0.35);
        }
        * {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: 'PingFang SC', 'Microsoft YaHei', 'Noto Sans SC', sans-serif;
            background-color: var(--bg-primary);
            color: var(--text-primary);
            line-height: 1.6;
            font-size: 16px;
            -webkit-font-smoothing: antialiased;
            overflow-x: hidden;
        }
        body::before {
            content: '';
            position: fixed;
            inset: 0;
            background-image: radial-gradient(circle at 18% 8%, rgba(0, 224, 198, 0.07) 0%, transparent 38%),
                radial-gradient(circle at 85% 90%, rgba(0, 166, 255, 0.05) 0%, transparent 42%),
                linear-gradient(rgba(0, 224, 198, 0.025) 1px, transparent 1px),
                linear-gradient(90deg, rgba(0, 224, 198, 0.025) 1px, transparent 1px);
            background-size: 100% 100%, 100% 100%, 42px 42px, 42px 42px;
            pointer-events: none;
            z-index: 0;
        }
        a {
            color: inherit;
            text-decoration: none;
        }
        img {
            max-width: 100%;
            display: block;
        }
        button {
            font-family: inherit;
            cursor: pointer;
        }
        .brand-dot {
            width: 10px;
            height: 10px;
            border-radius: 50%;
            background: var(--accent-cyan);
            box-shadow: 0 0 12px rgba(0, 224, 198, 0.8);
            animation: brandPulse 2s ease-in-out infinite;
            flex-shrink: 0;
        }
        @keyframes brandPulse {
            0%,
            100% {
                opacity: 1;
                box-shadow: 0 0 12px rgba(0, 224, 198, 0.8);
            }
            50% {
                opacity: 0.65;
                box-shadow: 0 0 22px rgba(0, 224, 198, 0.45);
            }
        }
        .nav-item {
            display: flex;
            align-items: center;
            padding: 12px 18px;
            color: var(--text-muted);
            font-size: 15px;
            font-weight: 500;
            border-radius: 8px;
            position: relative;
            transition: all 0.22s ease;
            text-decoration: none;
            margin-bottom: 2px;
        }
        .nav-item::before {
            content: '';
            position: absolute;
            left: 0;
            top: 22%;
            bottom: 22%;
            width: 3px;
            border-radius: 3px;
            background: transparent;
            transition: background 0.25s ease;
        }
        .nav-item:hover {
            color: #ffffff;
            background: rgba(255, 255, 255, 0.04);
        }
        .nav-item:hover::before {
            background: var(--accent-cyan);
        }
        .nav-item.active {
            color: #ffffff;
            background: rgba(0, 224, 198, 0.06);
        }
        .nav-item.active::before {
            background: var(--accent-orange);
        }
        .btn-primary {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            background: linear-gradient(135deg, var(--accent-cyan), var(--accent-blue));
            color: var(--text-inverse);
            font-weight: 600;
            font-size: 15px;
            border-radius: var(--radius-btn);
            padding: 13px 28px;
            border: none;
            cursor: pointer;
            transition: all 0.25s ease;
            text-decoration: none;
            line-height: 1.4;
        }
        .btn-primary:hover {
            box-shadow: 0 4px 24px var(--btn-glow);
            transform: translateY(-1px);
        }
        .btn-primary:active {
            transform: scale(0.98);
        }
        .btn-secondary {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            background: transparent;
            border: 1px solid var(--accent-cyan);
            color: var(--accent-cyan);
            font-weight: 500;
            font-size: 15px;
            border-radius: var(--radius-btn);
            padding: 12px 26px;
            cursor: pointer;
            transition: all 0.25s ease;
            text-decoration: none;
        }
        .btn-secondary:hover {
            background: rgba(0, 224, 198, 0.08);
            box-shadow: 0 0 18px rgba(0, 224, 198, 0.1);
        }
        .btn-secondary:active {
            transform: scale(0.98);
        }
        .glass-card {
            background: var(--card-bg);
            border: 1px solid var(--card-border);
            border-radius: var(--radius-card);
            backdrop-filter: blur(10px);
            -webkit-backdrop-filter: blur(10px);
            transition: all 0.3s ease;
        }
        .glass-card:hover {
            border-color: rgba(0, 224, 198, 0.6);
            box-shadow: var(--shadow-glow);
            transform: translateY(-3px);
        }
        .tag-badge {
            display: inline-flex;
            align-items: center;
            gap: 4px;
            padding: 4px 14px;
            background: rgba(0, 224, 198, 0.1);
            color: var(--accent-cyan);
            font-size: 12px;
            font-weight: 500;
            border-radius: var(--radius-tag);
            letter-spacing: 0.02em;
        }
        .tag-badge.orange {
            background: rgba(255, 122, 26, 0.1);
            color: var(--accent-orange);
        }
        .section-label {
            font-size: 13px;
            font-weight: 600;
            letter-spacing: 0.18em;
            text-transform: uppercase;
            color: var(--accent-cyan);
            margin-bottom: 8px;
        }
        .section-title {
            font-size: 32px;
            font-weight: 700;
            line-height: 1.3;
            color: #ffffff;
            margin-bottom: 12px;
        }
        .section-sub {
            font-size: 16px;
            line-height: 1.7;
            color: var(--text-muted);
            max-width: 640px;
        }
        .hero-divider {
            height: 1px;
            background: linear-gradient(90deg, transparent, var(--accent-cyan), transparent);
            opacity: 0.5;
            margin-top: 48px;
        }
        .faq-item {
            background: var(--card-bg);
            border: 1px solid var(--card-border);
            border-radius: 12px;
            overflow: hidden;
            transition: all 0.3s ease;
            margin-bottom: 12px;
        }
        .faq-item.active {
            border-color: rgba(0, 224, 198, 0.5);
            box-shadow: var(--shadow-glow);
        }
        .faq-head {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 20px 24px;
            cursor: pointer;
            font-size: 16px;
            font-weight: 600;
            color: var(--text-primary);
            transition: color 0.2s;
        }
        .faq-head:hover {
            color: var(--accent-cyan);
        }
        .faq-arrow {
            flex-shrink: 0;
            margin-left: 12px;
            color: var(--accent-cyan);
            transition: transform 0.35s ease;
        }
        .faq-item.active .faq-arrow {
            transform: rotate(180deg);
        }
        .faq-body {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.35s ease;
            padding: 0 24px;
            color: var(--text-muted);
            font-size: 14px;
            line-height: 1.9;
        }
        .faq-item.active .faq-body {
            max-height: 400px;
            padding-bottom: 24px;
        }
        .form-input {
            width: 100%;
            background: rgba(10, 17, 32, 0.7);
            border: 1px solid rgba(255, 255, 255, 0.1);
            border-radius: 8px;
            padding: 12px 16px;
            font-size: 14px;
            color: var(--text-primary);
            outline: none;
            transition: all 0.25s ease;
            font-family: inherit;
        }
        .form-input:focus {
            border-color: var(--accent-cyan);
            box-shadow: 0 0 0 3px rgba(0, 224, 198, 0.15);
        }
        .form-input::placeholder {
            color: rgba(147, 165, 180, 0.55);
        }
        select.form-input {
            appearance: none;
            background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8' fill='none' stroke='%2393A5B4' stroke-width='1.5'%3E%3Cpath d='M1 1l5 5 5-5'/%3E%3C/svg%3E");
            background-repeat: no-repeat;
            background-position: right 16px center;
        }
        .site-footer {
            background: #060B15;
            border-top: 1px solid rgba(0, 224, 198, 0.12);
            position: relative;
            z-index: 10;
        }
        .footer-link {
            color: var(--text-muted);
            font-size: 14px;
            text-decoration: none;
            transition: color 0.2s ease;
        }
        .footer-link:hover {
            color: var(--accent-cyan);
        }
        .img-wrap {
            position: relative;
            overflow: hidden;
            border-radius: 14px;
            background: linear-gradient(135deg, rgba(16, 27, 49, 0.8), rgba(10, 17, 32, 0.9));
        }
        .img-wrap img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.5s ease;
        }
        .img-wrap:hover img {
            transform: scale(1.03);
        }
        .img-wrap::after {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(to top, rgba(10, 17, 32, 0.35), transparent 45%);
            pointer-events: none;
        }
        .case-card {
            background: var(--card-bg);
            border: 1px solid var(--card-border);
            border-radius: var(--radius-card);
            overflow: hidden;
            transition: all 0.3s ease;
        }
        .case-card:hover {
            border-color: rgba(0, 224, 198, 0.45);
            box-shadow: var(--shadow-glow);
            transform: translateY(-2px);
        }
        .download-row {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            padding: 18px 8px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.05);
            transition: background 0.2s ease;
            border-radius: 6px;
        }
        .download-row:hover {
            background: rgba(255, 255, 255, 0.025);
        }
        .download-row:last-child {
            border-bottom: none;
        }
        .metric-number {
            font-family: 'Roboto Mono', 'DIN Alternate', monospace;
            font-size: 44px;
            font-weight: 700;
            line-height: 1.1;
            background: linear-gradient(135deg, var(--accent-cyan), var(--accent-blue));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .metric-number.orange {
            background: linear-gradient(135deg, var(--accent-orange), #FFB347);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .cta-band {
            background: linear-gradient(115deg, rgba(16, 27, 49, 0.95) 0%, rgba(10, 17, 32, 0.9) 60%, rgba(0, 224, 198, 0.08) 100%),
                url('/assets/images/backpic/back-2.webp');
            background-size: cover;
            background-position: center;
            border-radius: 18px;
            border: 1px solid rgba(0, 224, 198, 0.15);
            position: relative;
            overflow: hidden;
        }
        .cta-band::after {
            content: '';
            position: absolute;
            top: 0;
            right: 0;
            width: 120px;
            height: 100%;
            background: linear-gradient(to left, rgba(0, 224, 198, 0.12), transparent);
            clip-path: polygon(100% 0, 100% 100%, 0 100%);
            pointer-events: none;
        }
        .mobile-nav-link {
            display: block;
            padding: 16px 24px;
            font-size: 22px;
            font-weight: 600;
            color: var(--text-muted);
            border-bottom: 1px solid rgba(255, 255, 255, 0.04);
            transition: all 0.2s;
            text-decoration: none;
        }
        .mobile-nav-link:hover {
            color: var(--accent-cyan);
            padding-left: 32px;
        }
        .mobile-nav-link.active {
            color: var(--accent-cyan);
        }
        @media (max-width: 1024px) {
            .section-title {
                font-size: 28px;
            }
            .metric-number {
                font-size: 36px;
            }
        }
        @media (max-width: 640px) {
            .section-title {
                font-size: 24px;
            }
            .section-sub {
                font-size: 14px;
            }
            .btn-primary,
            .btn-secondary {
                width: 100%;
                padding: 14px 20px;
            }
            .faq-head {
                font-size: 15px;
                padding: 16px 18px;
            }
            .faq-body {
                padding: 0 18px;
            }
            .faq-item.active .faq-body {
                padding-bottom: 18px;
            }
            .download-row {
                flex-wrap: wrap;
                padding: 14px 4px;
            }
        }
        .scanline {
            height: 1px;
            background: linear-gradient(90deg, transparent, rgba(0, 224, 198, 0.6), transparent);
            position: relative;
        }
        .scanline::after {
            content: '';
            position: absolute;
            top: 0;
            left: -100%;
            width: 60%;
            height: 1px;
            background: linear-gradient(90deg, transparent, var(--accent-cyan));
            animation: scanMove 4s infinite linear;
        }
        @keyframes scanMove {
            0% {
                left: -60%;
            }
            100% {
                left: 110%;
            }
        }

/* roulang page: category3 */
:root {
            --bg-primary: #0A1120;
            --bg-secondary: #101B31;
            --card-bg: rgba(255, 255, 255, 0.045);
            --card-border: rgba(255, 255, 255, 0.09);
            --cyan: #00E0C6;
            --blue: #00A6FF;
            --orange: #FF7A1A;
            --text-primary: #E6EDF6;
            --text-muted: #93A5B4;
            --radius-card: 16px;
            --radius-btn: 8px;
            --radius-tag: 4px;
            --shadow-glow: 0 0 30px rgba(0, 224, 198, 0.12);
            --font-family: 'PingFang SC', 'Microsoft YaHei', 'Noto Sans SC', system-ui, sans-serif;
        }

        html {
            scroll-behavior: smooth;
        }

        body {
            background-color: var(--bg-primary);
            color: var(--text-primary);
            font-family: var(--font-family);
            line-height: 1.6;
            -webkit-font-smoothing: antialiased;
        }

        * {
            box-sizing: border-box;
        }
        a {
            text-decoration: none;
            color: inherit;
        }

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

        .bg-grid-overlay {
            position: fixed;
            inset: 0;
            z-index: 0;
            pointer-events: none;
            background: radial-gradient(circle at 12% 8%, rgba(0, 224, 198, 0.10), transparent 35%),
                radial-gradient(circle at 88% 92%, rgba(0, 102, 255, 0.07), transparent 40%),
                linear-gradient(180deg, rgba(5, 10, 20, 0.0) 0%, rgba(5, 10, 20, 0.9) 100%);
        }
        .bg-grid-overlay::before {
            content: "";
            position: absolute;
            inset: 0;
            background-image: linear-gradient(rgba(0, 224, 198, 0.05) 1px, transparent 1px),
                linear-gradient(90deg, rgba(0, 224, 198, 0.05) 1px, transparent 1px);
            background-size: 56px 56px;
            mask-image: radial-gradient(ellipse at center, rgba(0, 0, 0, 0.7), transparent 78%);
            -webkit-mask-image: radial-gradient(ellipse at center, rgba(0, 0, 0, 0.7), transparent 78%);
        }

        .site-sidebar {
            position: fixed;
            left: 0;
            top: 0;
            bottom: 0;
            width: 248px;
            z-index: 50;
            background: rgba(10, 17, 32, 0.92);
            backdrop-filter: blur(14px);
            border-right: 1px solid rgba(255, 255, 255, 0.06);
            flex-direction: column;
            justify-content: space-between;
            padding: 32px 20px 24px;
        }

        .brand-dot {
            display: inline-block;
            width: 10px;
            height: 10px;
            border-radius: 50%;
            background: var(--cyan);
            box-shadow: 0 0 12px rgba(0, 224, 198, 0.7);
        }

        .nav-item {
            display: flex;
            align-items: center;
            gap: 10px;
            padding: 12px 14px;
            border-radius: 8px;
            font-size: 15px;
            color: var(--text-muted);
            border-left: 3px solid transparent;
            transition: all 0.25s ease;
            position: relative;
        }
        .nav-item:hover {
            color: #ffffff;
            background: rgba(255, 255, 255, 0.04);
            border-left-color: var(--cyan);
        }
        .nav-item.active {
            color: #ffffff;
            background: rgba(255, 255, 255, 0.05);
            border-left-color: var(--orange);
        }
        .nav-item.active::after {
            content: "";
            position: absolute;
            right: 10px;
            top: 50%;
            transform: translateY(-50%);
            width: 4px;
            height: 4px;
            border-radius: 50%;
            background: var(--orange);
        }

        .mobile-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 60;
            height: 64px;
            background: rgba(10, 17, 32, 0.92);
            backdrop-filter: blur(14px);
            border-bottom: 1px solid rgba(255, 255, 255, 0.06);
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 0 20px;
        }

        .mobile-drawer {
            position: fixed;
            inset: 0;
            z-index: 70;
            background: rgba(5, 8, 16, 0.96);
            display: flex;
            flex-direction: column;
            justify-content: center;
            padding: 40px 32px;
            opacity: 0;
            visibility: hidden;
            transition: opacity 0.3s ease, visibility 0.3s ease;
        }
        .mobile-drawer.open {
            opacity: 1;
            visibility: visible;
        }
        .mobile-drawer .nav-item {
            font-size: 22px;
            padding: 16px 8px;
            justify-content: center;
            border-left: none;
            border-bottom: 1px solid rgba(255, 255, 255, 0.06);
        }
        .mobile-drawer .nav-item.active {
            border-left: none;
            color: var(--cyan);
            background: rgba(0, 224, 198, 0.06);
        }

        .page-hero {
            position: relative;
            padding: 96px 0 64px;
            background-image: url('/assets/images/backpic/back-1.png');
            background-size: cover;
            background-position: center;
            border-bottom: 1px solid rgba(0, 224, 198, 0.15);
        }
        .page-hero::before {
            content: "";
            position: absolute;
            inset: 0;
            background: linear-gradient(90deg, rgba(10, 17, 32, 0.98) 0%, rgba(10, 17, 32, 0.85) 45%, rgba(10, 17, 32, 0.55) 100%);
        }
        .page-hero .hero-content {
            position: relative;
            z-index: 2;
        }

        .breadcrumb-item {
            font-size: 13px;
            color: rgba(147, 165, 180, 0.75);
        }
        .breadcrumb-item a {
            transition: color 0.2s;
        }
        .breadcrumb-item a:hover {
            color: var(--cyan);
        }

        .glass-card {
            background: var(--card-bg);
            border: 1px solid var(--card-border);
            border-radius: var(--radius-card);
            transition: all 0.3s ease;
        }
        .glass-card:hover {
            transform: translateY(-3px);
            border-color: rgba(0, 224, 198, 0.45);
            box-shadow: var(--shadow-glow);
        }

        .btn-primary {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: linear-gradient(135deg, #00E0C6 0%, #00A6FF 100%);
            color: #07111F;
            font-weight: 600;
            font-size: 15px;
            padding: 12px 28px;
            border-radius: var(--radius-btn);
            border: none;
            cursor: pointer;
            transition: all 0.28s ease;
            box-shadow: 0 0 20px rgba(0, 224, 198, 0.25);
        }
        .btn-primary:hover {
            box-shadow: 0 0 32px rgba(0, 224, 198, 0.4);
            transform: translateY(-1px);
        }
        .btn-primary:active {
            transform: scale(0.98);
        }

        .btn-outline {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: transparent;
            border: 1px solid rgba(0, 224, 198, 0.45);
            color: var(--cyan);
            font-weight: 500;
            font-size: 15px;
            padding: 11px 26px;
            border-radius: var(--radius-btn);
            cursor: pointer;
            transition: all 0.28s ease;
        }
        .btn-outline:hover {
            background: rgba(0, 224, 198, 0.1);
            border-color: var(--cyan);
        }
        .btn-outline:active {
            transform: scale(0.98);
        }

        .section-label {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-size: 12px;
            font-weight: 600;
            letter-spacing: 0.04em;
            color: var(--cyan);
            background: rgba(0, 224, 198, 0.08);
            border: 1px solid rgba(0, 224, 198, 0.18);
            padding: 4px 14px;
            border-radius: 999px;
            text-transform: uppercase;
        }

        .service-icon {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 52px;
            height: 52px;
            border-radius: 12px;
            background: linear-gradient(135deg, rgba(0, 224, 198, 0.12), rgba(0, 166, 255, 0.10));
            border: 1px solid rgba(0, 224, 198, 0.25);
            color: var(--cyan);
            flex-shrink: 0;
        }

        .badge-tag {
            display: inline-flex;
            align-items: center;
            gap: 4px;
            font-size: 12px;
            font-weight: 500;
            padding: 3px 10px;
            border-radius: var(--radius-tag);
            background: rgba(0, 224, 198, 0.1);
            color: var(--cyan);
            border: 1px solid rgba(0, 224, 198, 0.15);
        }
        .badge-orange {
            background: rgba(255, 122, 26, 0.1);
            border-color: rgba(255, 122, 26, 0.2);
            color: var(--orange);
        }

        .timeline-item {
            position: relative;
            padding-left: 36px;
            padding-bottom: 40px;
        }
        .timeline-item:last-child {
            padding-bottom: 0;
        }
        .timeline-item::before {
            content: "";
            position: absolute;
            left: 12px;
            top: 24px;
            bottom: -4px;
            width: 1px;
            background: linear-gradient(180deg, rgba(0, 224, 198, 0.4), rgba(0, 224, 198, 0.02));
        }
        .timeline-item:last-child::before {
            display: none;
        }
        .timeline-dot {
            position: absolute;
            left: 5px;
            top: 4px;
            width: 15px;
            height: 15px;
            border-radius: 50%;
            background: var(--bg-primary);
            border: 3px solid var(--cyan);
            box-shadow: 0 0 12px rgba(0, 224, 198, 0.35);
            z-index: 2;
        }

        .step-number {
            font-family: 'DIN Alternate', 'Roboto Mono', monospace;
            font-size: 13px;
            font-weight: 700;
            color: var(--orange);
            letter-spacing: 0.05em;
        }

        .cert-badge {
            display: flex;
            flex-direction: column;
            align-items: center;
            justify-content: center;
            gap: 10px;
            padding: 28px 20px;
            border-radius: var(--radius-card);
            background: rgba(255, 255, 255, 0.03);
            border: 1px solid rgba(255, 255, 255, 0.08);
            transition: all 0.3s ease;
            text-align: center;
        }
        .cert-badge:hover {
            border-color: rgba(0, 224, 198, 0.35);
            background: rgba(0, 224, 198, 0.05);
            transform: translateY(-2px);
            box-shadow: 0 8px 30px rgba(0, 0, 0, 0.2);
        }
        .cert-badge .cert-icon {
            width: 42px;
            height: 42px;
            color: var(--cyan);
        }

        .accordion-item {
            border-radius: 12px;
            background: rgba(255, 255, 255, 0.03);
            border: 1px solid rgba(255, 255, 255, 0.08);
            overflow: hidden;
            transition: border-color 0.3s ease, box-shadow 0.3s ease;
        }
        .accordion-item.open {
            border-color: rgba(0, 224, 198, 0.4);
            box-shadow: 0 0 20px rgba(0, 224, 198, 0.08);
        }
        .accordion-header {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 18px 22px;
            cursor: pointer;
            font-size: 15px;
            font-weight: 600;
            color: var(--text-primary);
        }
        .accordion-icon {
            width: 24px;
            height: 24px;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            background: rgba(0, 224, 198, 0.1);
            border: 1px solid rgba(0, 224, 198, 0.25);
            color: var(--cyan);
            transition: transform 0.3s ease;
            font-size: 14px;
            line-height: 1;
        }
        .accordion-item.open .accordion-icon {
            transform: rotate(180deg);
        }
        .accordion-content {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.4s ease;
            padding: 0 22px;
            color: var(--text-muted);
            font-size: 14px;
            line-height: 1.8;
        }
        .accordion-item.open .accordion-content {
            max-height: 300px;
            padding-bottom: 20px;
        }

        .cta-block {
            position: relative;
            background: linear-gradient(135deg, rgba(0, 224, 198, 0.06), rgba(0, 166, 255, 0.04)), var(--bg-secondary);
            border: 1px solid rgba(0, 224, 198, 0.15);
            border-radius: var(--radius-card);
            padding: 48px 60px;
            overflow: hidden;
        }
        .cta-block::after {
            content: "";
            position: absolute;
            top: 0;
            right: 0;
            width: 120px;
            height: 120px;
            background: radial-gradient(circle, rgba(0, 224, 198, 0.15), transparent 70%);
            border-bottom-left-radius: 100%;
        }

        .site-footer {
            background: #060B14;
            border-top: 1px solid rgba(0, 224, 198, 0.25);
        }
        .footer-link {
            color: var(--text-muted);
            font-size: 14px;
            transition: color 0.2s;
        }
        .footer-link:hover {
            color: var(--cyan);
        }

        .faq-section {
            background: rgba(255, 255, 255, 0.01);
            border-top: 1px solid rgba(255, 255, 255, 0.04);
            border-bottom: 1px solid rgba(255, 255, 255, 0.04);
        }

        .data-img {
            border-radius: 12px;
            border: 1px solid rgba(255, 255, 255, 0.08);
        }

        .mobile-menu-btn {
            display: flex;
            align-items: center;
            justify-content: center;
            width: 40px;
            height: 40px;
            border-radius: 8px;
            border: 1px solid rgba(255, 255, 255, 0.12);
            background: rgba(255, 255, 255, 0.03);
            cursor: pointer;
            color: var(--text-primary);
        }

        @media (max-width: 1023px) {
            .site-sidebar {
                display: none !important;
            }
        }
        @media (min-width: 1024px) {
            .mobile-header,
            .mobile-drawer {
                display: none !important;
            }
        }

        @media (max-width: 640px) {
            .cta-block {
                padding: 32px 24px;
            }
            .page-hero {
                padding: 72px 0 40px;
            }
        }