/* roulang page: index */
/* ============ 设计变量 ============ */
:root {
  --primary: #e63b8b;
  --primary-dark: #c92074;
  --primary-glow: rgba(230, 59, 139, .35);
  --accent: #8b5cf6;
  --accent-glow: rgba(139, 92, 246, .3);
  --dark-bg: #0d0310;
  --dark-lv2: #180a16;
  --card-bg: #211020;
  --card-lv2: #2c1526;
  --text: #f7eef3;
  --text-weak: #b99ba6;
  --text-dim: #7e6371;
  --border: rgba(255, 255, 255, .08);
  --border-light: rgba(255, 255, 255, .14);
  --radius: 18px;
  --radius-sm: 12px;
  --shadow: 0 12px 40px rgba(230, 59, 139, .12);
  --shadow-card: 0 8px 28px rgba(0, 0, 0, .45);
  --shadow-hover: 0 18px 48px rgba(230, 59, 139, .25);
  --font: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  --transition: all .3s cubic-bezier(.4, 0, .2, 1);
  --container: 1200px;
}

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

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font);
  background: var(--dark-bg);
  color: var(--text);
  line-height: 1.7;
  font-size: 16px;
  overflow-x: hidden;
}

img {
  max-width: 100%;
  display: block;
  border-radius: var(--radius-sm);
}

a {
  color: inherit;
  text-decoration: none;
  transition: var(--transition);
}

ul, ol {
  list-style: none;
}

button, input {
  font-family: inherit;
  font-size: inherit;
  border: none;
  outline: none;
  background: none;
  cursor: pointer;
}

.container {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 28px;
}

section {
  padding: 96px 0;
  position: relative;
}

/* ============ 通用组件 ============ */
.section-tag {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 7px 18px;
  border-radius: 100px;
  background: linear-gradient(135deg, rgba(230, 59, 139, .16), rgba(139, 92, 246, .14));
  border: 1px solid rgba(230, 59, 139, .28);
  color: var(--text);
  font-size: 14px;
  font-weight: 600;
  letter-spacing: .5px;
  margin-bottom: 18px;
}

.section-title {
  font-size: clamp(26px, 4vw, 42px);
  font-weight: 800;
  line-height: 1.25;
  margin-bottom: 16px;
  letter-spacing: -1px;
}

.section-subtitle {
  font-size: 16px;
  color: var(--text-weak);
  max-width: 680px;
  margin-bottom: 48px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 14px 34px;
  border-radius: 100px;
  font-weight: 700;
  font-size: 16px;
  letter-spacing: .5px;
  transition: var(--transition);
  border: 1px solid transparent;
  line-height: 1;
  white-space: nowrap;
}

.btn:focus-visible {
  outline: 3px solid var(--accent-glow);
  outline-offset: 3px;
}

.btn-primary {
  background: linear-gradient(135deg, var(--primary), #ff6dad);
  color: #fff;
  box-shadow: 0 8px 28px var(--primary-glow);
}

.btn-primary:hover {
  transform: translateY(-3px);
  box-shadow: 0 14px 40px var(--primary-glow);
}

.btn-primary:active {
  transform: translateY(-1px);
}

.btn-ghost {
  background: rgba(255, 255, 255, .06);
  color: var(--text);
  border: 1px solid var(--border-light);
  backdrop-filter: blur(8px);
}

.btn-ghost:hover {
  background: rgba(255, 255, 255, .12);
  border-color: rgba(255, 255, 255, .3);
  transform: translateY(-3px);
}

.btn-ghost:active {
  transform: translateY(-1px);
}

.badge {
  display: inline-block;
  padding: 4px 14px;
  border-radius: 60px;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: .5px;
  background: linear-gradient(135deg, rgba(230, 59, 139, .22), rgba(139, 92, 246, .2));
  color: #ffd3e6;
  border: 1px solid rgba(230, 59, 139, .25);
}

.card {
  background: linear-gradient(180deg, var(--card-bg), var(--dark-lv2));
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 32px;
  transition: var(--transition);
}

.card:hover {
  transform: translateY(-8px);
  border-color: rgba(230, 59, 139, .3);
  box-shadow: var(--shadow);
}

/* ============ Header / Nav ============ */
.site-header {
  position: sticky;
  top: 0;
  z-index: 999;
  background: rgba(13, 3, 16, .82);
  backdrop-filter: blur(18px);
  border-bottom: 1px solid var(--border);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 74px;
  gap: 20px;
}

.brand-logo {
  font-size: 22px;
  font-weight: 900;
  letter-spacing: -.5px;
  background: linear-gradient(135deg, #ff6dad, var(--primary), var(--accent));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  flex-shrink: 0;
}

.brand-logo:hover {
  filter: brightness(1.2);
}

.main-nav {
  display: flex;
  align-items: center;
  gap: 6px;
}

.main-nav a {
  padding: 9px 18px;
  border-radius: 100px;
  font-weight: 600;
  font-size: 15px;
  color: var(--text-weak);
  transition: var(--transition);
}

.main-nav a:hover {
  color: var(--text);
  background: rgba(255, 255, 255, .06);
}

.main-nav a.active {
  color: #fff;
  background: linear-gradient(135deg, rgba(230, 59, 139, .3), rgba(139, 92, 246, .25));
  box-shadow: inset 0 0 0 1px rgba(230, 59, 139, .3);
}

.nav-cta {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-shrink: 0;
}

.nav-cta .btn {
  padding: 10px 24px;
  font-size: 14px;
}

.nav-toggle {
  display: none;
  width: 44px;
  height: 44px;
  border-radius: 12px;
  background: rgba(255, 255, 255, .06);
  border: 1px solid var(--border);
  align-items: center;
  justify-content: center;
  transition: var(--transition);
}

.nav-toggle:hover {
  background: rgba(255, 255, 255, .1);
}

.nav-toggle span {
  position: relative;
  width: 20px;
  height: 2px;
  background: var(--text);
  border-radius: 2px;
}

.nav-toggle span::before,
.nav-toggle span::after {
  content: '';
  position: absolute;
  left: 0;
  width: 20px;
  height: 2px;
  background: var(--text);
  border-radius: 2px;
  transition: var(--transition);
}

.nav-toggle span::before {
  top: -6px;
}

.nav-toggle span::after {
  top: 6px;
}

/* ============ Hero ============ */
.hero {
  min-height: 92vh;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  background:
    linear-gradient(rgba(13, 3, 16, .72), rgba(13, 3, 16, .88)),
    url('/assets/images/backpic/back-1.webp') no-repeat center center / cover;
  padding: 80px 0 60px;
}

.hero-content {
  max-width: 900px;
  margin: 0 auto;
}

.hero-tag {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 22px;
  border-radius: 100px;
  background: rgba(255, 255, 255, .06);
  border: 1px solid rgba(230, 59, 139, .3);
  font-size: 14px;
  font-weight: 600;
  color: #ffd3e6;
  margin-bottom: 28px;
}

.hero h1 {
  font-size: clamp(38px, 7vw, 72px);
  font-weight: 900;
  line-height: 1.12;
  letter-spacing: -2px;
  margin-bottom: 24px;
  background: linear-gradient(135deg, #fff 20%, #ffb0d4 55%, var(--accent) 100%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.hero-desc {
  font-size: clamp(16px, 2.2vw, 20px);
  color: var(--text-weak);
  max-width: 700px;
  margin: 0 auto 40px;
  line-height: 1.8;
}

.hero-actions {
  display: flex;
  justify-content: center;
  gap: 18px;
  flex-wrap: wrap;
  margin-bottom: 48px;
}

.hero-badges {
  display: flex;
  justify-content: center;
  gap: 12px;
  flex-wrap: wrap;
}

.hero-badges span {
  padding: 6px 18px;
  border-radius: 60px;
  background: rgba(255, 255, 255, .04);
  border: 1px solid var(--border);
  font-size: 13px;
  color: var(--text-weak);
}

/* ============ 特色功能 ============ */
.features {
  background: var(--dark-lv2);
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}

.feature-card {
  text-align: center;
  padding: 40px 28px;
}

.feature-icon {
  width: 64px;
  height: 64px;
  margin: 0 auto 22px;
  border-radius: 18px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 28px;
  background: linear-gradient(135deg, rgba(230, 59, 139, .2), rgba(139, 92, 246, .2));
  border: 1px solid rgba(230, 59, 139, .25);
}

.feature-card h3 {
  font-size: 18px;
  font-weight: 700;
  margin-bottom: 10px;
}

.feature-card p {
  font-size: 14px;
  color: var(--text-weak);
  line-height: 1.7;
}

/* ============ 内容分类 ============ */
.categories-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}

.category-card {
  position: relative;
  border-radius: var(--radius);
  overflow: hidden;
  min-height: 260px;
  display: flex;
  align-items: flex-end;
  transition: var(--transition);
  border: 1px solid var(--border);
}

.category-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-hover);
  border-color: var(--primary);
}

.category-card img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  z-index: 0;
}

.category-card::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(13, 3, 16, .15) 30%, rgba(13, 3, 16, .95) 100%);
  z-index: 1;
}

.category-card-content {
  position: relative;
  z-index: 2;
  padding: 28px;
  width: 100%;
}

.category-card-content h3 {
  font-size: 20px;
  font-weight: 800;
  margin-bottom: 8px;
}

.category-card-content p {
  font-size: 14px;
  color: var(--text-weak);
  line-height: 1.6;
}

/* ============ 内容列表 ============ */
.content-section {
  background: var(--dark-lv2);
}

.content-grid {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 22px;
}

.content-item {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  transition: var(--transition);
  display: flex;
  flex-direction: column;
}

.content-item:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow);
  border-color: rgba(230, 59, 139, .35);
}

.content-item .thumb {
  height: 130px;
  background: var(--card-lv2);
  position: relative;
  overflow: hidden;
}

.content-item .thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.content-item .thumb .play-icon {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(13, 3, 16, .3);
  opacity: 0;
  transition: var(--transition);
}

.content-item:hover .play-icon {
  opacity: 1;
}

.content-item .play-icon span {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--primary), var(--accent));
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 16px;
  color: #fff;
  box-shadow: 0 4px 18px var(--primary-glow);
}

.content-detail {
  padding: 16px 16px 18px;
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.content-detail h4 {
  font-size: 15px;
  font-weight: 700;
  line-height: 1.4;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.content-detail h4:hover {
  color: #ffa9cf;
}

.content-detail p {
  font-size: 13px;
  color: var(--text-weak);
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  line-height: 1.6;
}

.content-meta {
  margin-top: auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 12px;
  color: var(--text-dim);
  border-top: 1px solid var(--border);
  padding-top: 10px;
}

.content-meta .cat {
  color: #ffa9cf;
  font-weight: 600;
}

/* ============ 数据统计 ============ */
.stats-section {
  background: url('/assets/images/backpic/back-2.webp') no-repeat center center / cover;
  background-attachment: fixed;
  position: relative;
}

.stats-section::before {
  content: '';
  position: absolute;
  inset: 0;
  background: rgba(13, 3, 16, .88);
}

.stats-inner {
  position: relative;
  z-index: 1;
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 28px;
}

.stat-card {
  text-align: center;
  padding: 40px 20px;
  background: rgba(255, 255, 255, .04);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  backdrop-filter: blur(6px);
}

.stat-num {
  font-size: 42px;
  font-weight: 900;
  line-height: 1;
  margin-bottom: 10px;
  background: linear-gradient(135deg, #ff6dad, var(--accent));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.stat-label {
  font-size: 14px;
  color: var(--text-weak);
}

/* ============ 用户评价 ============ */
.testimonials-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.testimonial-card {
  padding: 32px;
}

.testimonial-card .stars {
  color: #ffb43a;
  font-size: 16px;
  letter-spacing: 2px;
  margin-bottom: 16px;
}

.testimonial-card blockquote {
  font-size: 14px;
  color: var(--text-weak);
  line-height: 1.8;
  margin-bottom: 18px;
  font-style: normal;
}

.testimonial-user {
  display: flex;
  align-items: center;
  gap: 12px;
  border-top: 1px solid var(--border);
  padding-top: 16px;
}

.testimonial-user .avatar {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--primary), var(--accent));
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 15px;
  font-weight: 700;
  color: #fff;
  flex-shrink: 0;
}

.testimonial-user .name {
  font-size: 14px;
  font-weight: 600;
}

.testimonial-user .role {
  font-size: 12px;
  color: var(--text-dim);
}

/* ============ FAQ ============ */
.faq-container {
  max-width: 800px;
  margin: 0 auto;
}

.faq-item {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  margin-bottom: 14px;
  overflow: hidden;
  transition: var(--transition);
}

.faq-item:hover {
  border-color: rgba(230, 59, 139, .3);
}

.faq-item details {
  width: 100%;
}

.faq-item summary {
  padding: 22px 26px;
  cursor: pointer;
  font-size: 16px;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  list-style: none;
  transition: var(--transition);
}

.faq-item summary::-webkit-details-marker {
  display: none;
}

.faq-item summary::after {
  content: '+';
  font-size: 24px;
  color: var(--primary);
  flex-shrink: 0;
  transition: var(--transition);
}

.faq-item details[open] summary::after {
  transform: rotate(45deg);
}

.faq-item details[open] summary {
  color: #ffa9cf;
}

.faq-answer {
  padding: 0 26px 22px;
  color: var(--text-weak);
  font-size: 15px;
  line-height: 1.75;
  border-top: 1px solid var(--border);
  padding-top: 16px;
  margin-top: 0;
}

/* ============ CTA ============ */
.cta-section {
  background:
    linear-gradient(rgba(13, 3, 16, .82), rgba(13, 3, 16, .92)),
    url('/assets/images/backpic/back-3.webp') no-repeat center center / cover;
  text-align: center;
  padding: 90px 0;
}

.cta-section .section-title {
  color: #fff;
}

.cta-section p {
  color: var(--text-weak);
  font-size: 16px;
  margin-bottom: 34px;
}

.cta-actions {
  display: flex;
  justify-content: center;
  gap: 18px;
  flex-wrap: wrap;
}

.cta-note {
  margin-top: 20px;
  font-size: 13px;
  color: var(--text-dim);
}

/* ============ Footer ============ */
.site-footer {
  background: #0a030c;
  border-top: 1px solid var(--border);
  padding: 60px 0 30px;
}

.footer-inner {
  display: flex;
  flex-wrap: wrap;
  gap: 40px;
  justify-content: space-between;
  margin-bottom: 40px;
}

.footer-brand .brand-logo {
  font-size: 24px;
  display: block;
  margin-bottom: 14px;
}

.footer-brand p {
  font-size: 13px;
  color: var(--text-dim);
  max-width: 280px;
  line-height: 1.7;
}

.footer-links {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.footer-links h4 {
  font-size: 14px;
  font-weight: 700;
  color: #fff;
  margin-bottom: 6px;
  text-transform: none;
}

.footer-links a {
  font-size: 14px;
  color: var(--text-weak);
  transition: var(--transition);
}

.footer-links a:hover {
  color: #ffa9cf;
  padding-left: 4px;
}

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

/* ============ 响应式 ============ */
@media (max-width: 1024px) {
  .features-grid {
    grid-template-columns: repeat(2, 1fr);
  }

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

  .content-grid {
    grid-template-columns: repeat(3, 1fr);
  }

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

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

@media (max-width: 768px) {
  section {
    padding: 64px 0;
  }

  .nav-toggle {
    display: flex;
  }

  .main-nav {
    display: none;
    position: absolute;
    top: 74px;
    left: 0;
    right: 0;
    background: var(--dark-lv2);
    flex-direction: column;
    padding: 20px;
    gap: 8px;
    border-bottom: 1px solid var(--border);
    box-shadow: var(--shadow-card);
  }

  .main-nav.open {
    display: flex;
  }

  .main-nav a {
    width: 100%;
    text-align: center;
  }

  .nav-cta .btn {
    display: none;
  }

  .hero {
    min-height: auto;
    padding: 70px 0 50px;
  }

  .hero-actions {
    flex-direction: column;
    align-items: center;
  }

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

  .testimonials-grid {
    grid-template-columns: 1fr;
  }

  .footer-inner {
    flex-direction: column;
    gap: 30px;
  }
}

@media (max-width: 520px) {
  .container {
    padding: 0 20px;
  }

  .features-grid {
    grid-template-columns: 1fr;
  }

  .categories-grid {
    grid-template-columns: 1fr;
  }

  .content-grid {
    grid-template-columns: 1fr;
  }

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

  .category-card {
    min-height: 200px;
  }

  .section-title {
    font-size: 26px;
  }

  .brand-logo {
    font-size: 18px;
  }

  .hero h1 {
    font-size: 36px;
  }

  .btn {
    width: 100%;
    padding: 15px 20px;
  }

  .faq-item summary {
    padding: 18px 20px;
    font-size: 15px;
  }

  .faq-answer {
    padding: 0 20px 18px;
  }
}

/* roulang page: category1 */
:root {
  --bg: #0b0b12;
  --bg-soft: #12121b;
  --card: #181823;
  --card-hover: #1f1f2e;
  --brand: #ff2950;
  --brand-hover: #ff1240;
  --brand-2: #ff7a3c;
  --text: #f2f2f6;
  --text-muted: #9d9db4;
  --border: rgba(255,255,255,.08);
  --radius-sm: 10px;
  --radius: 16px;
  --radius-lg: 24px;
  --shadow-sm: 0 4px 16px rgba(0,0,0,.25);
  --shadow: 0 14px 44px rgba(0,0,0,.38);
  --max-w: 1200px;
  --space: 96px;
  --space-md: 64px;
  --space-sm: 40px;
  --grad: linear-gradient(135deg,#ff2950 0%,#ff7a3c 100%);
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{font-family:"PingFang SC","Microsoft YaHei","Helvetica Neue",Arial,sans-serif;background:var(--bg);color:var(--text);line-height:1.7;font-size:16px;-webkit-font-smoothing:antialiased}
img{max-width:100%;display:block;border:0}
a{color:inherit;text-decoration:none}
ul,ol{list-style:none}
button{font-family:inherit;cursor:pointer;border:none;background:none;color:inherit}
input,textarea{font-family:inherit}
.container{max-width:var(--max-w);margin:0 auto;padding:0 28px;position:relative;z-index:1}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:13px 28px;border-radius:999px;font-size:15px;font-weight:600;line-height:1;transition:all .3s ease;will-change:transform}
.btn-primary{background:var(--grad);color:#fff;box-shadow:0 8px 28px rgba(255,41,80,.35)}
.btn-primary:hover{transform:translateY(-3px);box-shadow:0 12px 36px rgba(255,41,80,.5)}
.btn-outline{border:1px solid rgba(255,255,255,.25);background:rgba(255,255,255,.04);color:#fff;backdrop-filter:blur(8px)}
.btn-outline:hover{border-color:var(--brand);background:rgba(255,41,80,.12);transform:translateY(-3px)}
.btn-lg{padding:17px 40px;font-size:17px}
.badge{display:inline-block;padding:6px 16px;border-radius:999px;background:rgba(255,41,80,.12);color:#ff8a9e;font-size:13px;font-weight:600;letter-spacing:.5px;border:1px solid rgba(255,41,80,.22)}
.section{padding:var(--space) 0;position:relative}
.section-soft{background:var(--bg-soft)}
.section-head{max-width:760px;margin-bottom:48px}
.section-head.center{margin-left:auto;margin-right:auto;text-align:center}
.section-title{font-size:clamp(26px,4vw,40px);line-height:1.3;font-weight:800;letter-spacing:-.5px;margin-top:16px}
.section-desc{margin-top:14px;color:var(--text-muted);font-size:16px}
.highlight{background:var(--grad);-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent}

/* ===== Header ===== */
.site-header{position:sticky;top:0;z-index:100;background:rgba(11,11,18,.82);backdrop-filter:blur(16px);border-bottom:1px solid var(--border)}
.header-inner{display:flex;align-items:center;justify-content:space-between;height:70px;gap:20px}
.brand-logo{font-size:22px;font-weight:900;letter-spacing:.5px;background:var(--grad);-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent;white-space:nowrap}
.main-nav{display:flex;align-items:center;gap:30px}
.main-nav a{font-size:14.5px;font-weight:500;color:var(--text-muted);transition:color .2s;position:relative;white-space:nowrap}
.main-nav a::after{content:"";position:absolute;left:0;bottom:-6px;width:0;height:2px;border-radius:2px;background:var(--grad);transition:width .3s}
.main-nav a:hover{color:#fff}
.main-nav a.active{color:#fff}
.main-nav a.active::after{width:100%}
.nav-cta{display:flex;align-items:center;gap:14px}
.nav-toggle{width:40px;height:40px;border-radius:10px;display:none;align-items:center;justify-content:center;border:1px solid var(--border);background:rgba(255,255,255,.05);transition:background .2s}
.nav-toggle:hover{background:rgba(255,255,255,.1)}
.nav-toggle span,.nav-toggle span::before,.nav-toggle span::after{display:block;width:18px;height:2px;background:#fff;border-radius:2px;transition:all .3s}
.nav-toggle span{position:relative}
.nav-toggle span::before,.nav-toggle span::after{content:"";position:absolute;left:0}
.nav-toggle span::before{top:-5px}
.nav-toggle span::after{top:5px}
.nav-toggle.open span{background:transparent}
.nav-toggle.open span::before{transform:rotate(45deg);top:0}
.nav-toggle.open span::after{transform:rotate(-45deg);top:0}

/* ===== Hero ===== */
.hero{position:relative;padding:130px 0 140px;overflow:hidden}
.hero-bg{position:absolute;inset:0;background:url('/assets/images/backpic/back-1.webp') center center/cover no-repeat;filter:brightness(.38) saturate(1.2)}
.hero-bg::after{content:"";position:absolute;inset:0;background:linear-gradient(180deg,rgba(11,11,18,.72) 0%,rgba(11,11,18,.35) 50%,var(--bg) 100%)}
.hero-inner{max-width:680px}
.hero .badge{margin-bottom:20px}
.hero-title{font-size:clamp(32px,5vw,56px);line-height:1.16;font-weight:900;letter-spacing:-1px}
.hero-sub{margin-top:20px;font-size:17px;color:rgba(255,255,255,.78);max-width:580px}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:32px}
.hero-meta{display:flex;flex-wrap:wrap;gap:28px;margin-top:44px}
.hero-meta-item{display:flex;align-items:center;gap:10px;font-size:14px;color:rgba(255,255,255,.6)}
.hero-meta-item i{width:34px;height:34px;border-radius:50%;background:rgba(255,255,255,.1);display:flex;align-items:center;justify-content:center;font-style:normal;font-size:16px;color:#ff8a9e}

/* ===== Feature Cards ===== */
.feature-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:22px}
.feature-card{background:var(--card);border:1px solid var(--border);border-radius:var(--radius);padding:30px 26px;transition:all .35s ease}
.feature-card:hover{background:var(--card-hover);transform:translateY(-6px);box-shadow:var(--shadow);border-color:rgba(255,41,80,.25)}
.feature-icon{width:56px;height:56px;border-radius:14px;background:var(--grad);display:flex;align-items:center;justify-content:center;font-size:26px;font-style:normal;margin-bottom:20px;box-shadow:0 8px 24px rgba(255,41,80,.3)}
.feature-card h3{font-size:18px;font-weight:700;margin-bottom:10px}
.feature-card p{font-size:14px;color:var(--text-muted);line-height:1.65}

/* ===== Category Cards ===== */
.cat-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.cat-card{position:relative;border-radius:var(--radius);overflow:hidden;background:var(--card);border:1px solid var(--border);transition:all .35s ease;display:block}
.cat-card:hover{transform:translateY(-6px);box-shadow:var(--shadow);border-color:rgba(255,41,80,.3)}
.cat-card .img-wrap{position:relative;aspect-ratio:16/10;overflow:hidden}
.cat-card .img-wrap img{width:100%;height:100%;object-fit:cover;transition:transform .6s ease}
.cat-card:hover .img-wrap img{transform:scale(1.07)}
.cat-card .img-wrap::after{content:"";position:absolute;inset:0;background:linear-gradient(180deg,transparent 40%,rgba(11,11,18,.85) 100%)}
.cat-card-body{position:absolute;left:0;right:0;bottom:0;padding:22px;z-index:2}
.cat-card-tag{font-size:12px;color:#ff8a9e;font-weight:600;background:rgba(255,41,80,.18);border:1px solid rgba(255,41,80,.25);border-radius:999px;padding:4px 12px;display:inline-block;margin-bottom:10px}
.cat-card h3{font-size:20px;font-weight:800;margin-bottom:6px}
.cat-card p{font-size:13.5px;color:rgba(255,255,255,.7);line-height:1.6}

/* ===== Steps ===== */
.steps-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;counter-reset:step}
.step-card{background:var(--card);border:1px solid var(--border);border-radius:var(--radius-lg);padding:34px 28px;position:relative;transition:all .35s ease}
.step-card:hover{transform:translateY(-6px);box-shadow:var(--shadow);border-color:rgba(255,41,80,.25)}
.step-num{font-size:15px;font-weight:800;letter-spacing:1px;background:var(--grad);-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent;margin-bottom:14px}
.step-card h3{font-size:18px;font-weight:700;margin-bottom:10px}
.step-card p{font-size:14px;color:var(--text-muted);line-height:1.65}

/* ===== Stats ===== */
.stats-wrap{background:var(--card);border:1px solid var(--border);border-radius:var(--radius-lg);padding:46px 40px;display:grid;grid-template-columns:repeat(4,1fr);gap:28px;text-align:center}
.stat-item .stat-num{font-size:clamp(26px,4vw,40px);font-weight:900;background:var(--grad);-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent;line-height:1.2}
.stat-item .stat-label{margin-top:8px;font-size:14px;color:var(--text-muted)}

/* ===== FAQ ===== */
.faq-list{max-width:820px;margin:0 auto;display:grid;gap:16px}
.faq-item{background:var(--card);border:1px solid var(--border);border-radius:var(--radius);overflow:hidden;transition:border-color .3s}
.faq-item:hover{border-color:rgba(255,41,80,.2)}
.faq-item summary{list-style:none;cursor:pointer;padding:22px 26px;font-size:16px;font-weight:600;position:relative;display:flex;align-items:center;gap:14px;transition:color .2s}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary::after{content:"+";margin-left:auto;font-size:24px;font-weight:400;color:var(--text-muted);transition:transform .3s;flex-shrink:0}
.faq-item[open] summary::after{transform:rotate(45deg);color:var(--brand)}
.faq-item[open] summary{color:#fff}
.faq-item .faq-body{padding:0 26px 24px;font-size:15px;color:var(--text-muted);line-height:1.8}

/* ===== CTA ===== */
.cta-section{position:relative;padding:100px 0;overflow:hidden;text-align:center}
.cta-bg{position:absolute;inset:0;background:url('/assets/images/backpic/back-3.webp') center center/cover no-repeat;filter:brightness(.3) saturate(1.2)}
.cta-bg::after{content:"";position:absolute;inset:0;background:linear-gradient(180deg,rgba(11,11,18,.55),rgba(11,11,18,.9))}
.cta-inner{position:relative;z-index:2;max-width:640px;margin:0 auto}
.cta-title{font-size:clamp(24px,4vw,38px);font-weight:900;line-height:1.3}
.cta-desc{margin-top:14px;color:rgba(255,255,255,.75);font-size:16px}
.cta-inner .btn{margin-top:30px}

/* ===== Footer ===== */
.site-footer{background:#08080d;border-top:1px solid var(--border);padding:70px 0 0}
.footer-inner{display:grid;grid-template-columns:2fr 1fr 1fr;gap:44px;padding-bottom:50px}
.footer-brand p{font-size:14px;color:var(--text-muted);margin-top:16px;line-height:1.8;max-width:280px}
.footer-links h4{font-size:15px;font-weight:700;margin-bottom:16px}
.footer-links a{display:block;font-size:14px;color:var(--text-muted);padding:6px 0;transition:color .2s,transform .2s}
.footer-links a:hover{color:#fff;transform:translateX(4px)}
.footer-bottom{border-top:1px solid var(--border);padding:22px 0;display:flex;justify-content:space-between;flex-wrap:wrap;gap:10px;font-size:13px;color:var(--text-muted)}

/* ===== Responsive ===== */
@media (max-width:1024px){
  .feature-grid{grid-template-columns:repeat(2,1fr)}
  .cat-grid{grid-template-columns:repeat(2,1fr)}
  .steps-grid{grid-template-columns:repeat(2,1fr)}
  .stats-wrap{grid-template-columns:repeat(2,1fr)}
  .footer-inner{grid-template-columns:1fr 1fr;gap:36px}
}
@media (max-width:768px){
  :root{--space:60px;--space-md:44px}
  .section-head{margin-bottom:32px}
  .main-nav{position:fixed;top:70px;left:0;right:0;background:rgba(8,8,13,.97);backdrop-filter:blur(16px);flex-direction:column;align-items:flex-start;padding:28px 32px 36px;gap:8px;border-bottom:1px solid var(--border);transform:translateY(-8px);opacity:0;visibility:hidden;transition:all .3s ease;box-shadow:0 20px 50px rgba(0,0,0,.4)}
  .main-nav.open{transform:translateY(0);opacity:1;visibility:visible}
  .main-nav a{font-size:17px;padding:10px 0;display:block}
  .nav-toggle{display:inline-flex}
  .hero{padding:90px 0 100px}
  .hero-actions .btn{width:100%}
  .hero-meta{flex-direction:column;gap:14px}
  .cat-grid{grid-template-columns:1fr}
  .steps-grid{grid-template-columns:1fr}
  .feature-grid{grid-template-columns:1fr}
  .stats-wrap{grid-template-columns:1fr;padding:32px 24px}
  .footer-inner{grid-template-columns:1fr;gap:30px}
  .footer-bottom{flex-direction:column;text-align:center}
  .btn-lg{width:100%;padding:16px 24px}
}
@media (max-width:520px){
  .container{padding:0 20px}
  .header-inner{height:64px}
  .main-nav{top:64px}
  .brand-logo{font-size:19px}
  .hero-title{font-size:30px}
  .hero-sub{font-size:15px}
  .feature-card{padding:24px 20px}
  .step-card{padding:26px 20px}
  .faq-item summary{font-size:15px;padding:18px 20px}
  .faq-item .faq-body{padding:0 20px 20px}
  .stats-wrap{grid-template-columns:1fr;gap:20px}
}

/* roulang page: category5 */
:root {
  --bg: #0d0915;
  --bg-soft: #151021;
  --surface: #1c1429;
  --surface-2: #241a33;
  --surface-3: #2d2140;
  --ink: #f6f1ff;
  --muted: #b9a8d1;
  --brand: #b45cff;
  --brand-2: #ff4d8d;
  --brand-3: #25d5ff;
  --border: rgba(255, 255, 255, 0.08);
  --radius-lg: 24px;
  --radius-md: 16px;
  --radius-sm: 10px;
  --shadow: 0 24px 60px rgba(0, 0, 0, 0.45);
  --shadow-sm: 0 10px 30px rgba(0, 0, 0, 0.3);
  --gradient: linear-gradient(135deg, #8b5cf6 0%, #ec4899 100%);
  --gradient-soft: linear-gradient(135deg, rgba(139, 92, 246, 0.2), rgba(236, 72, 153, 0.15));
  --font: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
}
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}
html {
  scroll-behavior: smooth;
}
body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--ink);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}
img {
  max-width: 100%;
  display: block;
}
a {
  color: inherit;
  text-decoration: none;
  transition: color 0.25s, opacity 0.25s, transform 0.3s, box-shadow 0.3s;
}
button {
  font-family: inherit;
  border: none;
  background: none;
  cursor: pointer;
}
ul,
ol {
  list-style: none;
}
.container {
  width: 100%;
  max-width: 1220px;
  margin: 0 auto;
  padding: 0 24px;
}

/* ========== header ========== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(13, 9, 21, 0.82);
  backdrop-filter: blur(18px);
  border-bottom: 1px solid var(--border);
}
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 72px;
  gap: 24px;
}
.brand-logo {
  font-size: 1.5rem;
  font-weight: 800;
  letter-spacing: 1px;
  background: linear-gradient(120deg, #c39dff, #ff7ab6);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  white-space: nowrap;
}
.main-nav {
  display: flex;
  align-items: center;
  gap: 6px;
  flex-wrap: wrap;
}
.main-nav a {
  padding: 8px 16px;
  border-radius: 999px;
  font-size: 0.95rem;
  color: var(--muted);
  font-weight: 500;
}
.main-nav a:hover {
  color: var(--ink);
  background: rgba(255, 255, 255, 0.05);
}
.main-nav a.active {
  color: #fff;
  background: var(--gradient);
  box-shadow: 0 6px 20px rgba(236, 72, 153, 0.35);
}
.nav-cta {
  display: flex;
  align-items: center;
  gap: 12px;
}
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  border-radius: 999px;
  padding: 10px 24px;
  font-size: 0.95rem;
  font-weight: 700;
  border: 1px solid transparent;
  transition: all 0.3s;
}
.btn-primary {
  background: var(--gradient);
  color: #fff;
  box-shadow: 0 10px 26px rgba(236, 72, 153, 0.35);
}
.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 14px 34px rgba(236, 72, 153, 0.5);
}
.btn-outline {
  border-color: rgba(255, 255, 255, 0.25);
  color: var(--ink);
  background: rgba(255, 255, 255, 0.03);
}
.btn-outline:hover {
  border-color: rgba(255, 255, 255, 0.6);
  background: rgba(255, 255, 255, 0.08);
}
.btn-light {
  background: #fff;
  color: #1a1021;
}
.btn-light:hover {
  transform: translateY(-2px);
  box-shadow: 0 12px 30px rgba(255, 255, 255, 0.2);
}
.nav-toggle {
  display: none;
  width: 42px;
  height: 42px;
  border-radius: 12px;
  border: 1px solid var(--border);
  background: rgba(255, 255, 255, 0.04);
  position: relative;
}
.nav-toggle span,
.nav-toggle span::before,
.nav-toggle span::after {
  content: "";
  display: block;
  width: 18px;
  height: 2px;
  background: var(--ink);
  border-radius: 4px;
  position: absolute;
  left: 50%;
  top: 50%;
  margin-left: -9px;
  margin-top: -1px;
  transition: 0.3s;
}
.nav-toggle span::before {
  transform: translateY(-6px);
}
.nav-toggle span::after {
  transform: translateY(6px);
}

/* ========== hero ========== */
.hero {
  position: relative;
  padding: 96px 0 150px;
  background: url('/assets/images/backpic/back-1.webp') center / cover no-repeat;
  overflow: hidden;
}
.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse at 20% 10%, rgba(139, 92, 246, 0.30), transparent 50%),
    radial-gradient(ellipse at 80% 20%, rgba(236, 72, 153, 0.28), transparent 50%),
    linear-gradient(180deg, #0d0915 0%, rgba(13, 9, 21, 0.82) 60%, var(--bg) 100%);
  z-index: 1;
}
.hero-inner {
  position: relative;
  z-index: 2;
  text-align: center;
  max-width: 860px;
  margin: 0 auto;
}
.hero-tag {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 7px 20px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(255, 255, 255, 0.14);
  color: #ddd0f5;
  font-size: 0.9rem;
  margin-bottom: 26px;
  backdrop-filter: blur(8px);
}
.hero-tag::before {
  content: "";
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--brand-2);
  box-shadow: 0 0 12px var(--brand-2);
}
.hero h1 {
  font-size: clamp(2.4rem, 6vw, 4.2rem);
  font-weight: 900;
  line-height: 1.2;
  letter-spacing: 1px;
  background: linear-gradient(120deg, #ffffff 20%, #d9c4ff 60%, #ff9dc4 100%);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  margin-bottom: 22px;
}
.hero-sub {
  font-size: 1.2rem;
  color: var(--muted);
  max-width: 680px;
  margin: 0 auto 36px;
  line-height: 1.9;
}
.hero-btns {
  display: flex;
  justify-content: center;
  gap: 18px;
  flex-wrap: wrap;
  margin-bottom: 42px;
}
.hero-tags {
  display: flex;
  justify-content: center;
  gap: 12px;
  flex-wrap: wrap;
  margin-bottom: 56px;
}
.hero-tags span {
  padding: 8px 20px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--border);
  color: #cfc0e4;
  font-size: 0.9rem;
  backdrop-filter: blur(6px);
}
.hero-cards {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  text-align: left;
}
.h-card {
  background: rgba(28, 20, 41, 0.85);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 26px;
  backdrop-filter: blur(14px);
  display: flex;
  gap: 16px;
  align-items: center;
  transition: transform 0.3s, box-shadow 0.3s;
  box-shadow: var(--shadow-sm);
}
.h-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow);
}
.h-card-icon {
  flex: 0 0 54px;
  height: 54px;
  border-radius: 16px;
  background: var(--gradient-soft);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  border: 1px solid rgba(255, 255, 255, 0.1);
}
.h-card h3 {
  font-size: 1.06rem;
  margin-bottom: 4px;
}
.h-card p {
  color: var(--muted);
  font-size: 0.86rem;
  line-height: 1.5;
}

/* ========== section common ========== */
.section {
  padding: 92px 0;
}
.section-header {
  text-align: center;
  max-width: 720px;
  margin: 0 auto 56px;
}
.section-tag {
  display: inline-block;
  padding: 6px 18px;
  border-radius: 999px;
  background: rgba(139, 92, 246, 0.14);
  border: 1px solid rgba(139, 92, 246, 0.4);
  color: #cdb3ff;
  font-size: 0.82rem;
  margin-bottom: 16px;
}
.section-header h2 {
  font-size: clamp(1.8rem, 4vw, 2.6rem);
  font-weight: 800;
  line-height: 1.3;
  margin-bottom: 14px;
}
.section-header p {
  color: var(--muted);
  font-size: 1.06rem;
}

/* ========== feature strip ========== */
.features {
  padding: 70px 0;
  background: var(--bg-soft);
  border-bottom: 1px solid var(--border);
}
.features-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}
.feature-item {
  text-align: center;
  padding: 28px 18px;
  border-radius: var(--radius-md);
  background: rgba(255, 255, 255, 0.02);
  border: 1px solid var(--border);
}
.feature-item .icon {
  font-size: 2rem;
  margin-bottom: 12px;
}
.feature-item h4 {
  font-size: 1.05rem;
  margin-bottom: 6px;
}
.feature-item p {
  color: var(--muted);
  font-size: 0.9rem;
}

/* ========== guide cards ========== */
.guide-section {
  background: linear-gradient(180deg, var(--bg) 0%, var(--bg-soft) 100%);
}
.guide-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.guide-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: transform 0.35s, box-shadow 0.35s, border-color 0.35s;
}
.guide-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow);
  border-color: rgba(139, 92, 246, 0.35);
}
.guide-card-img {
  position: relative;
  display: block;
  overflow: hidden;
  aspect-ratio: 16 / 9;
}
.guide-card-img img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.5s;
}
.guide-card:hover .guide-card-img img {
  transform: scale(1.06);
}
.guide-card-img::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(13, 9, 21, 0.1) 0%, rgba(13, 9, 21, 0.75) 100%);
}
.guide-card-badge {
  position: absolute;
  left: 16px;
  top: 16px;
  z-index: 2;
  display: inline-block;
  padding: 5px 14px;
  border-radius: 999px;
  background: rgba(0, 0, 0, 0.55);
  backdrop-filter: blur(8px);
  border: 1px solid rgba(255, 255, 255, 0.2);
  color: #fff;
  font-size: 0.78rem;
  letter-spacing: 1px;
}
.guide-card-content {
  padding: 26px;
}
.guide-card-content h3 {
  font-size: 1.25rem;
  font-weight: 800;
  margin-bottom: 12px;
  line-height: 1.4;
}
.guide-card-content p {
  color: var(--muted);
  font-size: 0.95rem;
  margin-bottom: 20px;
  line-height: 1.8;
}
.card-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  color: #c89cff;
  font-size: 0.92rem;
  font-weight: 600;
}
.card-link::after {
  content: "→";
  transition: transform 0.3s;
}
.card-link:hover {
  color: #ff8ab8;
}
.card-link:hover::after {
  transform: translateX(4px);
}

/* ========== steps ========== */
.steps-section {
  background: var(--bg);
}
.steps-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}
.step-item {
  position: relative;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 34px 24px 28px;
  transition: transform 0.3s, box-shadow 0.3s;
}
.step-item:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-sm);
}
.step-num {
  position: absolute;
  top: -18px;
  left: 24px;
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: var(--gradient);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 800;
  color: #fff;
  box-shadow: 0 8px 20px rgba(236, 72, 153, 0.4);
}
.step-item h4 {
  font-size: 1.1rem;
  margin: 12px 0 10px;
}
.step-item p {
  color: var(--muted);
  font-size: 0.92rem;
  line-height: 1.7;
}

/* ========== scenarios ========== */
.scenarios {
  background: url('/assets/images/backpic/back-2.webp') center / cover fixed no-repeat;
  position: relative;
}
.scenarios::before {
  content: "";
  position: absolute;
  inset: 0;
  background: rgba(13, 9, 21, 0.88);
}
.scenarios .container {
  position: relative;
  z-index: 1;
}
.scenario-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}
.scenario-card {
  background: rgba(28, 20, 41, 0.85);
  backdrop-filter: blur(10px);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 32px 22px;
  text-align: center;
  transition: transform 0.3s, box-shadow 0.3s;
}
.scenario-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow);
}
.scenario-card .icon {
  font-size: 2.2rem;
  margin-bottom: 14px;
}
.scenario-card h4 {
  font-size: 1.1rem;
  margin-bottom: 8px;
}
.scenario-card p {
  color: var(--muted);
  font-size: 0.88rem;
}

/* ========== trust stats ========== */
.trust-section {
  background: var(--bg-soft);
}
.trust-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}
.trust-item {
  text-align: center;
  padding: 36px 20px;
  border-radius: var(--radius-lg);
  background: var(--surface);
  border: 1px solid var(--border);
}
.trust-item strong {
  display: block;
  font-size: 2.2rem;
  font-weight: 900;
  background: linear-gradient(120deg, #c79fff, #ff8ab8);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  margin-bottom: 8px;
}
.trust-item span {
  color: var(--muted);
  font-size: 0.95rem;
}

/* ========== trending ========== */
.trending-section {
  background: var(--bg);
}
.trending-list {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.trend-item {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 24px;
  display: flex;
  gap: 16px;
  transition: transform 0.3s, box-shadow 0.3s;
}
.trend-item:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-sm);
}
.trend-rank {
  flex: 0 0 44px;
  height: 44px;
  border-radius: 14px;
  background: var(--gradient);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 900;
  font-size: 1.1rem;
  color: #fff;
}
.trend-rank.rank-2 {
  background: linear-gradient(135deg, #7c6fe0, #b44cff);
}
.trend-rank.rank-3 {
  background: linear-gradient(135deg, #c06fd0, #ff4d8d);
}
.trend-item h4 {
  font-size: 1.05rem;
  margin-bottom: 6px;
  line-height: 1.4;
}
.trend-item p {
  color: var(--muted);
  font-size: 0.88rem;
}
.trend-item .tag {
  display: inline-block;
  margin-top: 8px;
  padding: 3px 12px;
  border-radius: 999px;
  background: rgba(139, 92, 246, 0.16);
  border: 1px solid rgba(139, 92, 246, 0.3);
  color: #cdb3ff;
  font-size: 0.78rem;
}

/* ========== FAQ ========== */
.faq-section {
  background: var(--bg-soft);
}
.faq-list {
  max-width: 860px;
  margin: 0 auto;
}
.faq-item {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  margin-bottom: 14px;
  overflow: hidden;
  transition: border-color 0.3s;
}
.faq-item.active {
  border-color: rgba(139, 92, 246, 0.5);
}
.faq-q {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 22px 26px;
  font-size: 1.06rem;
  font-weight: 700;
  cursor: pointer;
  width: 100%;
  text-align: left;
  color: var(--ink);
}
.faq-q .faq-icon {
  flex: 0 0 26px;
  height: 26px;
  border-radius: 50%;
  border: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 400;
  color: var(--muted);
  transition: transform 0.3s, background 0.3s, color 0.3s;
}
.faq-item.active .faq-q .faq-icon {
  transform: rotate(45deg);
  background: var(--gradient);
  color: #fff;
  border-color: transparent;
}
.faq-a {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.4s ease;
}
.faq-a-inner {
  padding: 0 26px 24px;
  color: var(--muted);
  line-height: 1.9;
  font-size: 0.98rem;
}

/* ========== CTA ========== */
.cta-section {
  position: relative;
  padding: 100px 0;
  background: url('/assets/images/backpic/back-3.webp') center / cover no-repeat;
  text-align: center;
}
.cta-section::before {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(120deg, rgba(109, 40, 217, 0.85), rgba(219, 39, 119, 0.82));
}
.cta-section .container {
  position: relative;
  z-index: 1;
}
.cta-section h2 {
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 900;
  margin-bottom: 18px;
  color: #fff;
}
.cta-section p {
  color: rgba(255, 255, 255, 0.9);
  font-size: 1.15rem;
  max-width: 640px;
  margin: 0 auto 36px;
}
.cta-btns {
  display: flex;
  justify-content: center;
  gap: 16px;
  flex-wrap: wrap;
}
.cta-btns .btn-dark {
  background: #150d1f;
  color: #fff;
}
.cta-btns .btn-dark:hover {
  transform: translateY(-2px);
  box-shadow: 0 14px 30px rgba(0, 0, 0, 0.4);
}

/* ========== footer ========== */
.site-footer {
  background: #0a0710;
  border-top: 1px solid var(--border);
  padding: 70px 0 0;
}
.footer-inner {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: 48px;
  padding-bottom: 48px;
}
.footer-brand p {
  color: var(--muted);
  margin-top: 16px;
  font-size: 0.95rem;
  line-height: 1.9;
  max-width: 360px;
}
.footer-links h4 {
  font-size: 1rem;
  margin-bottom: 16px;
  color: #ddd0f5;
}
.footer-links a {
  display: block;
  color: var(--muted);
  font-size: 0.92rem;
  padding: 6px 0;
}
.footer-links a:hover {
  color: #fff;
}
.footer-bottom {
  padding: 20px 0;
  border-top: 1px solid var(--border);
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  color: #8d7ba5;
  font-size: 0.86rem;
  flex-wrap: wrap;
}

/* ========== responsive ========== */
@media (max-width: 1024px) {
  .features-grid,
  .trust-grid,
  .scenario-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .guide-grid,
  .trending-list,
  .steps-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .hero {
    padding: 80px 0 110px;
  }
}
@media (max-width: 768px) {
  .header-inner {
    flex-wrap: wrap;
    min-height: 64px;
    padding: 10px 0;
  }
  .main-nav {
    order: 3;
    width: 100%;
    display: none;
    flex-direction: column;
    align-items: stretch;
    gap: 4px;
    padding-bottom: 14px;
  }
  .main-nav.show {
    display: flex;
  }
  .main-nav a {
    padding: 12px 16px;
    border-radius: 12px;
  }
  .nav-toggle {
    display: block;
  }
  .nav-cta .btn {
    display: none;
  }
  .hero-cards {
    grid-template-columns: 1fr;
  }
  .section {
    padding: 64px 0;
  }
  .footer-inner {
    grid-template-columns: 1fr;
    gap: 32px;
  }
}
@media (max-width: 520px) {
  .container {
    padding: 0 18px;
  }
  .features-grid,
  .trust-grid,
  .scenario-grid,
  .guide-grid,
  .trending-list,
  .steps-grid {
    grid-template-columns: 1fr;
  }
  .hero {
    padding: 64px 0 90px;
  }
  .hero-sub {
    font-size: 1.02rem;
  }
  .hero-tags {
    gap: 8px;
  }
  .hero-tags span {
    padding: 6px 14px;
    font-size: 0.82rem;
  }
  .footer-bottom {
    flex-direction: column;
    text-align: center;
  }
}

/* roulang page: category2 */
:root {
  --primary: #e63946;
  --primary-dark: #b71c2c;
  --primary-light: #ff6b76;
  --accent: #ff8fa3;
  --dark: #12101f;
  --dark-2: #1c1930;
  --dark-3: #262242;
  --surface: #1f1b36;
  --surface-2: #2a2547;
  --text: #f5f0ff;
  --text-muted: #a99fc4;
  --border: rgba(255,255,255,0.08);
  --radius-lg: 20px;
  --radius-md: 14px;
  --radius-sm: 10px;
  --shadow-sm: 0 4px 16px rgba(0,0,0,0.25);
  --shadow-md: 0 10px 32px rgba(0,0,0,0.35);
  --shadow-glow: 0 0 44px rgba(230,57,70,0.28);
  --gradient-hero: linear-gradient(135deg, #1c1930 0%, #2a1040 48%, #3d0f22 100%);
  --gradient-primary: linear-gradient(135deg, #e63946 0%, #ff6b76 100%);
  --gradient-card: linear-gradient(160deg, rgba(230,57,70,0.16) 0%, rgba(28,25,48,0.4) 55%, rgba(38,34,66,0.85) 100%);
  --font-main: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", system-ui, -apple-system, sans-serif;
  --space-section: clamp(72px, 8vw, 120px);
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body { font-family: var(--font-main); background: var(--dark); color: var(--text); line-height: 1.7; font-size: 16px; -webkit-font-smoothing: antialiased; }

img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; transition: color 0.3s ease; }
ul, ol { list-style: none; }
button { font-family: inherit; cursor: pointer; }
input, textarea, select { font-family: inherit; }

.container { width: min(1200px, 92%); margin-inline: auto; }
section { padding-block: var(--space-section); position: relative; }
.section-head { text-align: center; max-width: 720px; margin: 0 auto clamp(48px, 6vw, 72px); }
.section-tag { display: inline-block; font-size: 13px; font-weight: 700; letter-spacing: 2px; color: var(--primary-light); background: rgba(230,57,70,0.12); border: 1px solid rgba(230,57,70,0.3); padding: 6px 18px; border-radius: 30px; text-transform: uppercase; margin-bottom: 16px; }
.section-title { font-size: clamp(28px, 4vw, 42px); line-height: 1.25; font-weight: 800; letter-spacing: -0.5px; margin-bottom: 16px; }
.section-sub { color: var(--text-muted); font-size: clamp(15px, 1.4vw, 17px); line-height: 1.8; }

/* Header */
.site-header { position: fixed; top: 0; left: 0; right: 0; z-index: 1000; background: rgba(18,16,31,0.85); backdrop-filter: blur(18px); -webkit-backdrop-filter: blur(18px); border-bottom: 1px solid var(--border); transition: background 0.4s ease, box-shadow 0.4s ease; }
.site-header.scrolled { background: rgba(18,16,31,0.96); box-shadow: 0 10px 30px rgba(0,0,0,0.5); }
.header-inner { display: flex; align-items: center; justify-content: space-between; height: 72px; gap: 20px; }
.brand-logo { font-size: 22px; font-weight: 800; letter-spacing: 1px; color: var(--text); display: flex; align-items: center; gap: 8px; }
.brand-logo::before { content: ""; width: 10px; height: 10px; border-radius: 50%; background: var(--gradient-primary); box-shadow: 0 0 12px rgba(230,57,70,0.8); }
.main-nav { display: flex; align-items: center; gap: 6px; }
.main-nav a { padding: 8px 16px; font-size: 15px; font-weight: 500; color: var(--text-muted); border-radius: 30px; transition: all 0.3s ease; }
.main-nav a:hover { color: var(--text); background: rgba(255,255,255,0.06); }
.main-nav a.active { color: var(--text); background: rgba(230,57,70,0.15); box-shadow: inset 0 0 0 1px rgba(230,57,70,0.3); font-weight: 600; }
.nav-cta { display: flex; align-items: center; gap: 12px; }
.btn { display: inline-flex; align-items: center; justify-content: center; padding: 10px 26px; font-size: 15px; font-weight: 600; border-radius: 50px; border: none; transition: all 0.35s cubic-bezier(0.4, 0, 0.2, 1); letter-spacing: 0.5px; line-height: 1.5; text-align: center; }
.btn-primary { background: var(--gradient-primary); color: #fff; box-shadow: 0 4px 20px rgba(230,57,70,0.35); }
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 8px 30px rgba(230,57,70,0.5); }
.btn-primary:active { transform: translateY(0) scale(0.98); }
.btn-outline { background: transparent; color: var(--text); border: 1.5px solid var(--border); }
.btn-outline:hover { border-color: var(--primary-light); color: var(--primary-light); transform: translateY(-2px); }
.btn-lg { padding: 14px 40px; font-size: 17px; }
.nav-toggle { display: none; background: none; border: none; width: 42px; height: 42px; border-radius: 10px; position: relative; }
.nav-toggle span, .nav-toggle span::before, .nav-toggle span::after { content:""; display:block; width: 22px; height: 2px; background: var(--text); position: absolute; left: 50%; top: 50%; transform: translate(-50%, -50%); transition: all 0.3s ease; }
.nav-toggle span::before { top: -7px; }
.nav-toggle span::after { top: 7px; }
.nav-toggle.open span { background: transparent; }
.nav-toggle.open span::before { top: 0; transform: translate(-50%, -50%) rotate(45deg); }
.nav-toggle.open span::after { top: 0; transform: translate(-50%, -50%) rotate(-45deg); }

/* Hero */
.hero { padding: 0; min-height: 92vh; display: flex; align-items: center; background: var(--gradient-hero); position: relative; overflow: hidden; }
.hero::before { content:""; position:absolute; inset:0; background: url('/assets/images/backpic/back-1.webp') center/cover no-repeat; opacity: 0.35; }
.hero::after { content:""; position:absolute; inset:0; background: radial-gradient(ellipse at center, transparent 0%, rgba(18,16,31,0.6) 100%); }
.hero-inner { position: relative; z-index: 2; display: grid; grid-template-columns: 1.15fr 0.85fr; gap: 60px; align-items: center; padding-block: 140px 90px; }
.hero-badge { display: inline-flex; align-items: center; gap: 10px; background: rgba(255,255,255,0.08); border: 1px solid rgba(255,255,255,0.15); padding: 8px 20px; border-radius: 50px; font-size: 13px; font-weight: 600; letter-spacing: 1px; color: var(--text); margin-bottom: 24px; backdrop-filter: blur(8px); }
.hero-badge i { width: 8px; height: 8px; background: #4ade80; border-radius: 50%; box-shadow: 0 0 10px #4ade80; }
.hero h1 { font-size: clamp(38px, 5.4vw, 64px); font-weight: 900; line-height: 1.15; letter-spacing: -1px; margin-bottom: 22px; }
.hero h1 span { background: linear-gradient(135deg, var(--primary-light), #ffb4c2); -webkit-background-clip: text; background-clip: text; -webkit-text-fill-color: transparent; }
.hero-desc { color: var(--text-muted); font-size: clamp(15px, 1.5vw, 18px); line-height: 1.85; max-width: 540px; margin-bottom: 34px; }
.hero-actions { display: flex; align-items: center; gap: 18px; flex-wrap: wrap; }
.hero-tip { margin-top: 26px; font-size: 13px; color: var(--text-muted); display: flex; align-items: center; gap: 8px; }
.hero-tip i { width: 5px; height: 5px; background: #4ade80; border-radius: 50%; display: inline-block; }
.hero-visual { position: relative; }
.hero-visual-card { border-radius: var(--radius-lg); overflow: hidden; box-shadow: var(--shadow-lg, 0 20px 60px rgba(0,0,0,0.5)); position: relative; transform: perspective(1200px) rotateY(-6deg) rotateX(2deg); transition: transform 0.6s ease; border: 1px solid rgba(255,255,255,0.1); }
.hero-visual-card:hover { transform: perspective(1200px) rotateY(-2deg) rotateX(0deg); }
.hero-visual-card img { width: 100%; height: 500px; object-fit: cover; }
.hero-float-card { position: absolute; background: rgba(26,22,45,0.92); backdrop-filter: blur(16px); border: 1px solid var(--border); border-radius: 16px; padding: 16px 22px; box-shadow: var(--shadow-md); display: flex; align-items: center; gap: 14px; animation: float 5s ease-in-out infinite; }
.hero-float-card.card-top { top: 28px; left: -28px; }
.hero-float-card.card-bottom { bottom: 32px; right: -18px; animation-delay: 2.8s; }
.float-avatar { width: 44px; height: 44px; border-radius: 50%; background: var(--gradient-primary); display: flex; align-items: center; justify-content: center; font-weight: 700; color: #fff; font-size: 16px; }
.float-info p { font-size: 14px; font-weight: 600; line-height: 1.4; }
.float-info small { font-size: 12px; color: var(--text-muted); }
.float-dot { width: 10px; height: 10px; border-radius: 50%; background: #4ade80; box-shadow: 0 0 0 4px rgba(74,222,128,0.2); }
@keyframes float { 0%,100% { transform: translateY(0); } 50% { transform: translateY(-10px); } }

/* Stats strip */
.stats-strip { background: var(--dark-2); border-block: 1px solid var(--border); padding: 40px 0; position: relative; }
.stats-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 32px; text-align: center; }
.stat-item h3 { font-size: clamp(28px, 3vw, 40px); font-weight: 800; background: var(--gradient-primary); -webkit-background-clip: text; background-clip: text; -webkit-text-fill-color: transparent; line-height: 1.2; }
.stat-item p { color: var(--text-muted); font-size: 14px; margin-top: 4px; letter-spacing: 1px; }

/* Feature section */
.features { background: var(--dark); }
.feature-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 28px; }
.feature-card { background: linear-gradient(160deg, var(--surface) 0%, var(--dark-2) 100%); border: 1px solid var(--border); border-radius: var(--radius-lg); padding: 36px 32px; transition: all 0.45s cubic-bezier(0.4, 0, 0.2, 1); position: relative; overflow: hidden; }
.feature-card::before { content:""; position:absolute; top:0; left:0; right:0; height: 3px; background: var(--gradient-primary); transform: scaleX(0); transform-origin: left; transition: transform 0.5s ease; }
.feature-card:hover { transform: translateY(-6px); border-color: rgba(230,57,70,0.3); box-shadow: var(--shadow-md); }
.feature-card:hover::before { transform: scaleX(1); }
.feature-icon { width: 64px; height: 64px; border-radius: 18px; background: rgba(230,57,70,0.12); border: 1px solid rgba(230,57,70,0.25); display: flex; align-items: center; justify-content: center; margin-bottom: 22px; font-size: 26px; }
.feature-card h3 { font-size: 20px; font-weight: 700; margin-bottom: 12px; }
.feature-card p { color: var(--text-muted); font-size: 15px; line-height: 1.75; }

/* Scenes section with cover image */
.scenes { background: var(--dark-2); position: relative; }
.scenes::before { content:""; position:absolute; inset:0; background: url('/assets/images/backpic/back-2.webp') center/cover no-repeat; opacity: 0.08; }
.scenes-inner { position: relative; z-index: 2; display: grid; grid-template-columns: 1fr 1fr; gap: 64px; align-items: center; }
.scenes-visual { position: relative; border-radius: var(--radius-lg); overflow: hidden; box-shadow: var(--shadow-md); border: 1px solid var(--border); }
.scenes-visual img { width: 100%; height: 100%; min-height: 400px; object-fit: cover; transition: transform 0.7s ease; }
.scenes-visual:hover img { transform: scale(1.04); }
.scene-list { display: grid; gap: 20px; }
.scene-item { display: flex; gap: 16px; align-items: flex-start; background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius-md); padding: 22px 24px; transition: all 0.3s ease; }
.scene-item:hover { border-color: rgba(230,57,70,0.35); transform: translateX(6px); }
.scene-num { width: 36px; height: 36px; flex-shrink: 0; border-radius: 50%; background: var(--gradient-primary); display: flex; align-items: center; justify-content: center; font-weight: 700; font-size: 15px; color: #fff; }
.scene-item h4 { font-size: 17px; font-weight: 600; margin-bottom: 6px; }
.scene-item p { color: var(--text-muted); font-size: 14px; line-height: 1.7; }

/* Process */
.process { background: var(--dark); }
.process-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; counter-reset: step; }
.process-step { text-align: center; padding: 34px 22px; background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius-lg); position: relative; transition: all 0.4s ease; }
.process-step:hover { transform: translateY(-6px); box-shadow: var(--shadow-md); border-color: rgba(230,57,70,0.35); }
.process-step .step-num { width: 52px; height: 52px; margin: 0 auto 18px; border-radius: 50%; background: var(--gradient-primary); display: flex; align-items: center; justify-content: center; font-size: 22px; font-weight: 800; color: #fff; box-shadow: 0 8px 24px rgba(230,57,70,0.35); }
.process-step h3 { font-size: 18px; font-weight: 700; margin-bottom: 10px; }
.process-step p { color: var(--text-muted); font-size: 14px; line-height: 1.7; }

/* Social proof */
.testimonials { background: var(--dark-2); position: relative; }
.testimonials::before { content:""; position:absolute; inset:0; background: url('/assets/images/coverpic/cover-6.webp') center/cover no-repeat; opacity: 0.06; }
.testimonial-grid { position: relative; z-index: 2; display: grid; grid-template-columns: repeat(3, 1fr); gap: 26px; }
.testimonial-card { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius-lg); padding: 28px; transition: all 0.35s ease; }
.testimonial-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-md); border-color: rgba(230,57,70,0.3); }
.testimonial-stars { color: #fbbf24; font-size: 16px; letter-spacing: 3px; margin-bottom: 14px; }
.testimonial-card blockquote { color: var(--text); font-size: 15px; line-height: 1.8; margin-bottom: 20px; font-style: normal; }
.testimonial-user { display: flex; align-items: center; gap: 12px; }
.testimonial-avatar { width: 42px; height: 42px; border-radius: 50%; background: linear-gradient(135deg, #a78bfa, #e63946); display: flex; align-items: center; justify-content: center; font-weight: 700; color: #fff; font-size: 14px; }
.testimonial-user strong { display: block; font-size: 14px; }
.testimonial-user small { color: var(--text-muted); font-size: 12px; }

/* CTA */
.cta-section { background: var(--gradient-hero); position: relative; overflow: hidden; }
.cta-section::before { content:""; position:absolute; inset:0; background: url('/assets/images/backpic/back-3.webp') center/cover no-repeat; opacity: 0.2; }
.cta-inner { position: relative; z-index: 2; text-align: center; max-width: 680px; margin: 0 auto; }
.cta-inner h2 { font-size: clamp(28px, 4vw, 44px); font-weight: 800; margin-bottom: 16px; line-height: 1.3; }
.cta-inner p { color: var(--text-muted); font-size: 16px; margin-bottom: 32px; line-height: 1.8; }
.cta-actions { display: flex; justify-content: center; gap: 16px; flex-wrap: wrap; }
.cta-note { margin-top: 20px; font-size: 13px; color: rgba(255,255,255,0.5); }

/* FAQ */
.faq { background: var(--dark); }
.faq-list { max-width: 820px; margin: 0 auto; display: grid; gap: 14px; }
.faq-item { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius-md); overflow: hidden; transition: all 0.3s ease; }
.faq-item:hover { border-color: rgba(230,57,70,0.3); }
.faq-item.open { border-color: rgba(230,57,70,0.4); box-shadow: var(--shadow-sm); }
.faq-question { width: 100%; display: flex; align-items: center; justify-content: space-between; gap: 16px; padding: 22px 26px; background: none; border: none; color: var(--text); font-size: 16px; font-weight: 600; text-align: left; transition: color 0.3s ease; }
.faq-question:hover { color: var(--primary-light); }
.faq-question span:last-child { font-size: 20px; transition: transform 0.35s ease; color: var(--text-muted); flex-shrink: 0; }
.faq-item.open .faq-question span:last-child { transform: rotate(45deg); color: var(--primary-light); }
.faq-answer { max-height: 0; overflow: hidden; transition: max-height 0.45s cubic-bezier(0.4, 0, 0.2, 1); }
.faq-answer-inner { padding: 0 26px 22px; color: var(--text-muted); font-size: 15px; line-height: 1.8; }

/* Footer */
.site-footer { background: #0d0b18; border-top: 1px solid var(--border); padding: 64px 0 28px; }
.footer-inner { display: grid; grid-template-columns: 1.4fr 1fr 1fr; gap: 48px; margin-bottom: 44px; }
.footer-brand p { color: var(--text-muted); font-size: 14px; line-height: 1.8; margin-top: 16px; max-width: 340px; }
.footer-links h4 { font-size: 15px; font-weight: 700; margin-bottom: 18px; letter-spacing: 1px; color: var(--text); }
.footer-links a { display: block; color: var(--text-muted); font-size: 14px; padding: 5px 0; transition: all 0.2s ease; }
.footer-links a:hover { color: var(--primary-light); padding-left: 6px; }
.footer-bottom { border-top: 1px solid var(--border); padding-top: 22px; display: flex; justify-content: space-between; align-items: center; gap: 12px; flex-wrap: wrap; font-size: 13px; color: rgba(255,255,255,0.35); }

/* Responsive */
@media (max-width: 1024px) {
  .feature-grid { grid-template-columns: repeat(2, 1fr); }
  .process-grid { grid-template-columns: repeat(2, 1fr); }
  .testimonial-grid { grid-template-columns: repeat(2, 1fr); }
  .hero-inner { grid-template-columns: 1fr; gap: 48px; padding-top: 120px; }
  .hero-visual { max-width: 560px; margin: 0 auto; }
  .scenes-inner { grid-template-columns: 1fr; gap: 44px; }
  .stats-grid { grid-template-columns: repeat(2, 1fr); gap: 28px; }
}

@media (max-width: 768px) {
  .main-nav { display: none; position: absolute; top: 72px; left: 0; right: 0; background: rgba(18,16,31,0.98); backdrop-filter: blur(20px); flex-direction: column; align-items: stretch; padding: 16px 24px; gap: 4px; border-bottom: 1px solid var(--border); box-shadow: var(--shadow-md); }
  .main-nav.open { display: flex; }
  .main-nav a { padding: 12px 18px; border-radius: 12px; font-size: 16px; }
  .nav-toggle { display: block; }
  .nav-cta .btn { display: none; }
  .feature-grid { grid-template-columns: 1fr; }
  .process-grid { grid-template-columns: 1fr 1fr; }
  .testimonial-grid { grid-template-columns: 1fr; }
  .footer-inner { grid-template-columns: 1fr; gap: 32px; }
  .hero { min-height: 100vh; }
  .hero-inner { padding-top: 110px; padding-bottom: 70px; }
  .hero-visual-card img { height: 380px; }
  .hero-float-card.card-top { left: 8px; }
  .hero-float-card.card-bottom { right: 8px; }
  .footer-bottom { flex-direction: column; text-align: center; }
}

@media (max-width: 520px) {
  .hero h1 { font-size: 34px; }
  .process-grid { grid-template-columns: 1fr; }
  .stats-grid { grid-template-columns: 1fr 1fr; }
  .hero-actions { flex-direction: column; align-items: stretch; }
  .hero-actions .btn { width: 100%; }
  .hero-float-card { padding: 12px 16px; }
  .float-info p { font-size: 13px; }
  .section-title { font-size: 26px; }
  .btn-lg { padding: 13px 32px; font-size: 16px; }
}

/* roulang page: category3 */
:root {
      --primary: #ff3d81;
      --primary-dark: #d92263;
      --primary-glow: rgba(255, 61, 129, 0.38);
      --secondary: #7c3aed;
      --secondary-glow: rgba(124, 58, 237, 0.35);
      --bg: #0a0910;
      --bg-soft: #12101c;
      --bg-card: #181425;
      --text: #f7f2fc;
      --text-muted: #a99bb8;
      --border: rgba(255, 255, 255, 0.08);
      --radius: 20px;
      --radius-sm: 12px;
      --shadow: 0 20px 60px rgba(0, 0, 0, 0.45);
      --container: 1200px;
      --transition: 0.3s ease;
    }
    *,
    *::before,
    *::after {
      margin: 0;
      padding: 0;
      box-sizing: border-box;
    }
    html {
      scroll-behavior: smooth;
    }
    body {
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
      background: var(--bg);
      color: var(--text);
      line-height: 1.7;
      overflow-x: hidden;
    }
    img {
      max-width: 100%;
      display: block;
      border: 0;
    }
    a {
      color: inherit;
      text-decoration: none;
    }
    ul,
    ol {
      list-style: none;
    }
    button,
    input {
      font: inherit;
      border: 0;
      outline: 0;
    }
    .container {
      max-width: var(--container);
      margin: 0 auto;
      padding: 0 24px;
    }
    .site-header {
      position: sticky;
      top: 0;
      z-index: 1000;
      background: rgba(10, 9, 16, 0.86);
      -webkit-backdrop-filter: blur(18px);
      backdrop-filter: blur(18px);
      border-bottom: 1px solid var(--border);
    }
    .header-inner {
      display: flex;
      align-items: center;
      justify-content: space-between;
      height: 74px;
      gap: 16px;
    }
    .brand-logo {
      font-size: 1.32rem;
      font-weight: 800;
      letter-spacing: 0.03em;
      display: inline-flex;
      align-items: center;
      white-space: nowrap;
    }
    .brand-logo::before {
      content: "";
      width: 10px;
      height: 10px;
      border-radius: 50%;
      margin-right: 9px;
      background: linear-gradient(135deg, var(--primary), var(--secondary));
      box-shadow: 0 0 20px var(--primary-glow);
    }
    .main-nav {
      display: flex;
      align-items: center;
      gap: 26px;
    }
    .main-nav a {
      position: relative;
      font-size: 0.95rem;
      color: var(--text-muted);
      padding: 8px 0;
      transition: color var(--transition);
      white-space: nowrap;
    }
    .main-nav a:hover {
      color: var(--text);
    }
    .main-nav a.active {
      color: #fff;
      font-weight: 600;
    }
    .main-nav a.active::after {
      content: "";
      position: absolute;
      left: 0;
      bottom: 0;
      width: 100%;
      height: 2px;
      border-radius: 2px;
      background: linear-gradient(90deg, var(--primary), var(--secondary));
    }
    .nav-cta {
      display: flex;
      align-items: center;
      gap: 12px;
    }
    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 8px;
      padding: 12px 28px;
      border-radius: 999px;
      font-size: 0.95rem;
      font-weight: 600;
      border: 1px solid transparent;
      cursor: pointer;
      transition: all var(--transition);
      white-space: nowrap;
    }
    .btn-primary {
      background: linear-gradient(135deg, var(--primary), var(--primary-dark));
      color: #fff;
      box-shadow: 0 8px 26px rgba(255, 61, 129, 0.28);
    }
    .btn-primary:hover {
      transform: translateY(-2px);
      box-shadow: 0 14px 36px rgba(255, 61, 129, 0.42);
    }
    .btn-outline {
      background: transparent;
      border-color: var(--border);
      color: var(--text);
    }
    .btn-outline:hover {
      border-color: var(--primary);
      color: var(--primary);
    }
    .btn-lg {
      padding: 15px 40px;
      font-size: 1.05rem;
    }
    .nav-toggle {
      display: none;
      width: 46px;
      height: 46px;
      align-items: center;
      justify-content: center;
      flex-direction: column;
      background: none;
      border: 1px solid var(--border);
      border-radius: 12px;
      cursor: pointer;
    }
    .nav-toggle span {
      display: block;
      width: 20px;
      height: 2px;
      background: var(--text);
      border-radius: 2px;
      transition: all 0.3s ease;
    }
    .nav-toggle span + span {
      margin-top: 5px;
    }
    .nav-toggle[aria-expanded="true"] span:nth-child(1) {
      transform: translateY(7px) rotate(45deg);
    }
    .nav-toggle[aria-expanded="true"] span:nth-child(2) {
      opacity: 0;
    }
    .nav-toggle[aria-expanded="true"] span:nth-child(3) {
      transform: translateY(-7px) rotate(-45deg);
    }
    .hero {
      position: relative;
      padding: 130px 0 105px;
      overflow: hidden;
      background: linear-gradient(180deg, rgba(10, 9, 16, 0.35), rgba(10, 9, 16, 0.92)),
        url('/assets/images/backpic/back-1.webp') center center / cover no-repeat;
    }
    .hero::before {
      content: "";
      position: absolute;
      top: -120px;
      right: -100px;
      width: 420px;
      height: 420px;
      background: radial-gradient(circle, rgba(255, 61, 129, 0.22), transparent 70%);
      z-index: 0;
    }
    .hero-content {
      position: relative;
      z-index: 2;
      max-width: 920px;
      margin: 0 auto;
      text-align: center;
    }
    .hero-tag {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      padding: 8px 20px;
      border-radius: 999px;
      border: 1px solid var(--border);
      background: rgba(255, 255, 255, 0.05);
      font-size: 0.85rem;
      color: var(--text-muted);
      margin-bottom: 26px;
    }
    .hero h1 {
      font-size: clamp(2.2rem, 5vw, 3.7rem);
      font-weight: 900;
      line-height: 1.18;
      margin-bottom: 24px;
      background: linear-gradient(135deg, #fff 20%, #ffd3e3 70%);
      -webkit-background-clip: text;
      background-clip: text;
      -webkit-text-fill-color: transparent;
    }
    .hero-sub {
      font-size: 1.18rem;
      color: var(--text-muted);
      max-width: 700px;
      margin: 0 auto 38px;
    }
    .hero-actions {
      display: flex;
      justify-content: center;
      flex-wrap: wrap;
      gap: 16px;
      margin-bottom: 44px;
    }
    .hero-feats {
      display: flex;
      justify-content: center;
      flex-wrap: wrap;
      gap: 14px 32px;
    }
    .hero-feats li {
      display: flex;
      align-items: center;
      gap: 8px;
      color: var(--text-muted);
      font-size: 0.95rem;
    }
    .hero-feats li::before {
      content: "";
      width: 8px;
      height: 8px;
      border-radius: 50%;
      background: var(--primary);
      box-shadow: 0 0 12px var(--primary);
    }
    .section {
      padding: 95px 0;
    }
    .section-alt {
      background: var(--bg-soft);
    }
    .section-head {
      text-align: center;
      margin-bottom: 56px;
    }
    .section-tag {
      display: inline-block;
      padding: 6px 16px;
      border-radius: 999px;
      background: rgba(255, 61, 129, 0.1);
      color: var(--primary);
      font-size: 0.85rem;
      font-weight: 600;
      margin-bottom: 14px;
      letter-spacing: 0.04em;
    }
    .section-head h2 {
      font-size: clamp(1.8rem, 3.5vw, 2.7rem);
      font-weight: 800;
      line-height: 1.28;
      margin-bottom: 14px;
    }
    .section-head p {
      color: var(--text-muted);
      max-width: 640px;
      margin: 0 auto;
    }
    .grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }
    .card {
      background: var(--bg-card);
      border: 1px solid var(--border);
      border-radius: var(--radius);
      padding: 34px 28px;
      transition: all var(--transition);
    }
    .card:hover {
      transform: translateY(-6px);
      border-color: rgba(255, 61, 129, 0.4);
      box-shadow: var(--shadow);
    }
    .card-icon {
      width: 56px;
      height: 56px;
      border-radius: 16px;
      display: flex;
      align-items: center;
      justify-content: center;
      background: linear-gradient(135deg, rgba(255, 61, 129, 0.18), rgba(124, 58, 237, 0.18));
      font-size: 1.6rem;
      margin-bottom: 22px;
    }
    .card h3 {
      font-size: 1.2rem;
      font-weight: 700;
      margin-bottom: 10px;
      letter-spacing: 0.02em;
    }
    .card p {
      color: var(--text-muted);
      font-size: 0.95rem;
      line-height: 1.75;
    }
    .split {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 56px;
      align-items: center;
    }
    .split-img {
      position: relative;
      border-radius: var(--radius);
      overflow: hidden;
      box-shadow: var(--shadow);
    }
    .split-img img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      transition: transform 0.6s ease;
    }
    .split-img:hover img {
      transform: scale(1.04);
    }
    .split-img::after {
      content: "";
      position: absolute;
      inset: 0;
      background: linear-gradient(180deg, transparent 55%, rgba(10, 9, 16, 0.4));
    }
    .split-content h2 {
      font-size: clamp(1.7rem, 3.2vw, 2.4rem);
      font-weight: 800;
      line-height: 1.3;
      margin-bottom: 18px;
    }
    .split-content p {
      color: var(--text-muted);
      margin-bottom: 28px;
      font-size: 1rem;
    }
    .check-list {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 12px 22px;
    }
    .check-list li {
      position: relative;
      padding-left: 26px;
      color: var(--text);
      font-size: 0.95rem;
    }
    .check-list li::before {
      content: "✓";
      position: absolute;
      left: 0;
      top: 0;
      color: var(--primary);
      font-weight: 800;
    }
    .scene-list {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 18px;
    }
    .scene-item {
      padding: 22px 20px;
      background: var(--bg-card);
      border: 1px solid var(--border);
      border-radius: var(--radius-sm);
      transition: all var(--transition);
    }
    .scene-item:hover {
      border-color: rgba(124, 58, 237, 0.45);
      transform: translateY(-3px);
    }
    .scene-item h4 {
      font-size: 1.02rem;
      font-weight: 700;
      margin-bottom: 4px;
    }
    .scene-item span {
      color: var(--text-muted);
      font-size: 0.88rem;
    }
    .stats-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 22px;
    }
    .stat-card {
      text-align: center;
      padding: 40px 20px;
      background: var(--bg-card);
      border: 1px solid var(--border);
      border-radius: var(--radius);
      transition: all var(--transition);
    }
    .stat-card:hover {
      border-color: rgba(255, 61, 129, 0.35);
      box-shadow: var(--shadow);
    }
    .stat-num {
      font-size: 2.5rem;
      font-weight: 900;
      line-height: 1.2;
      background: linear-gradient(135deg, var(--primary), var(--secondary));
      -webkit-background-clip: text;
      background-clip: text;
      -webkit-text-fill-color: transparent;
    }
    .stat-label {
      margin-top: 10px;
      color: var(--text-muted);
      font-size: 0.92rem;
    }
    .steps {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 24px;
    }
    .step-item {
      position: relative;
      text-align: center;
      padding: 36px 18px;
      background: var(--bg-card);
      border: 1px solid var(--border);
      border-radius: var(--radius);
      transition: all var(--transition);
    }
    .step-item:hover {
      transform: translateY(-5px);
      border-color: rgba(255, 61, 129, 0.35);
    }
    .step-num {
      width: 58px;
      height: 58px;
      margin: 0 auto 20px;
      border-radius: 50%;
      background: linear-gradient(135deg, var(--primary), var(--secondary));
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 800;
      font-size: 1.3rem;
      box-shadow: 0 8px 24px rgba(255, 61, 129, 0.3);
    }
    .step-item h3 {
      font-size: 1.1rem;
      font-weight: 700;
      margin-bottom: 8px;
    }
    .step-item p {
      color: var(--text-muted);
      font-size: 0.92rem;
    }
    .faq-list {
      max-width: 820px;
      margin: 0 auto;
    }
    .faq-item {
      background: var(--bg-card);
      border: 1px solid var(--border);
      border-radius: 14px;
      margin-bottom: 14px;
      overflow: hidden;
      transition: border-color var(--transition);
    }
    .faq-item.open {
      border-color: rgba(255, 61, 129, 0.35);
    }
    .faq-q {
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 20px;
      padding: 22px 26px;
      cursor: pointer;
      font-weight: 600;
      font-size: 1rem;
      user-select: none;
    }
    .faq-arrow {
      flex-shrink: 0;
      width: 26px;
      height: 26px;
      display: flex;
      align-items: center;
      justify-content: center;
      border-radius: 50%;
      background: rgba(255, 255, 255, 0.06);
      font-size: 1rem;
      transition: transform var(--transition);
    }
    .faq-item.open .faq-arrow {
      transform: rotate(45deg);
    }
    .faq-a {
      max-height: 0;
      overflow: hidden;
      padding: 0 26px;
      color: var(--text-muted);
      font-size: 0.95rem;
      line-height: 1.8;
      transition: max-height 0.45s ease, padding 0.35s ease;
    }
    .faq-item.open .faq-a {
      max-height: 360px;
      padding-bottom: 22px;
    }
    .cta {
      position: relative;
      padding: 115px 0;
      text-align: center;
      overflow: hidden;
      background: linear-gradient(180deg, rgba(10, 9, 16, 0.3), rgba(10, 9, 16, 0.92)),
        url('/assets/images/backpic/back-2.webp') center center / cover no-repeat;
    }
    .cta-inner {
      position: relative;
      z-index: 2;
      max-width: 720px;
      margin: 0 auto;
    }
    .cta h2 {
      font-size: clamp(1.9rem, 3.6vw, 2.8rem);
      font-weight: 900;
      line-height: 1.3;
      margin-bottom: 18px;
    }
    .cta p {
      color: var(--text-muted);
      font-size: 1.1rem;
      margin-bottom: 38px;
    }
    .site-footer {
      background: #0d0a14;
      border-top: 1px solid var(--border);
      padding: 64px 0 28px;
    }
    .footer-inner {
      display: grid;
      grid-template-columns: 1.2fr 1fr 1fr;
      gap: 48px;
      padding-bottom: 44px;
      border-bottom: 1px solid var(--border);
    }
    .footer-brand .brand-logo {
      margin-bottom: 14px;
    }
    .footer-brand p {
      color: var(--text-muted);
      font-size: 0.94rem;
      max-width: 360px;
      line-height: 1.8;
    }
    .footer-links h4 {
      font-size: 1rem;
      font-weight: 700;
      margin-bottom: 16px;
    }
    .footer-links a {
      display: block;
      color: var(--text-muted);
      font-size: 0.92rem;
      margin-bottom: 10px;
      transition: color var(--transition);
    }
    .footer-links a:hover {
      color: var(--primary);
    }
    .footer-bottom {
      display: flex;
      flex-wrap: wrap;
      justify-content: space-between;
      gap: 10px 20px;
      padding-top: 24px;
      color: var(--text-muted);
      font-size: 0.85rem;
    }
    @media (max-width: 1024px) {
      .grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .split {
        grid-template-columns: 1fr;
        gap: 40px;
      }
      .split-img {
        max-height: 420px;
      }
      .steps {
        grid-template-columns: repeat(2, 1fr);
      }
      .stats-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .footer-inner {
        grid-template-columns: 1fr 1fr;
      }
    }
    @media (max-width: 900px) {
      .main-nav {
        position: fixed;
        top: 74px;
        left: 0;
        right: 0;
        background: rgba(10, 9, 16, 0.98);
        flex-direction: column;
        align-items: flex-start;
        gap: 0;
        padding: 10px 28px 24px;
        border-bottom: 1px solid var(--border);
        transform: translateY(-140%);
        transition: transform 0.4s ease;
        max-height: calc(100vh - 74px);
        overflow-y: auto;
      }
      .main-nav.open {
        transform: translateY(0);
      }
      .main-nav a {
        display: block;
        width: 100%;
        padding: 14px 0;
        font-size: 1rem;
        border-bottom: 1px solid rgba(255, 255, 255, 0.05);
      }
      .main-nav a.active::after {
        display: none;
      }
      .nav-toggle {
        display: inline-flex;
      }
    }
    @media (max-width: 768px) {
      .section {
        padding: 70px 0;
      }
      .grid {
        grid-template-columns: 1fr;
      }
      .hero {
        padding: 100px 0 80px;
      }
      .hero-sub {
        font-size: 1.02rem;
      }
      .scene-list,
      .check-list {
        grid-template-columns: 1fr;
      }
      .stats-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 14px;
      }
      .stat-card {
        padding: 28px 16px;
      }
      .steps {
        grid-template-columns: 1fr;
      }
      .footer-inner {
        grid-template-columns: 1fr;
        gap: 34px;
      }
      .footer-bottom {
        flex-direction: column;
        text-align: center;
      }
    }
    @media (max-width: 520px) {
      .container {
        padding: 0 18px;
      }
      .brand-logo {
        font-size: 1.12rem;
      }
      .btn {
        padding: 11px 20px;
        font-size: 0.9rem;
      }
      .btn-lg {
        padding: 13px 28px;
        font-size: 1rem;
      }
      .grid {
        grid-template-columns: 1fr;
      }
      .card {
        padding: 26px 22px;
      }
      .stats-grid {
        grid-template-columns: 1fr 1fr;
      }
      .stat-num {
        font-size: 2rem;
      }
      .hero h1 {
        font-size: 1.9rem;
      }
      .hero-actions {
        flex-direction: column;
        align-items: center;
      }
      .cta {
        padding: 80px 0;
      }
    }

/* roulang page: article */
:root {
  --primary: #ff2d55;
  --primary-dark: #e01e44;
  --accent: #8b5cf6;
  --bg: #0b0b12;
  --bg-deep: #07070d;
  --bg-card: #15151f;
  --bg-card-hover: #1c1c29;
  --text: #f0f0f5;
  --text-weak: #a0a0b5;
  --text-mute: #6b6b80;
  --border: rgba(255,255,255,0.08);
  --border-strong: rgba(255,255,255,0.16);
  --radius: 18px;
  --radius-sm: 12px;
  --radius-xs: 8px;
  --shadow: 0 20px 50px rgba(0,0,0,0.4);
  --shadow-sm: 0 8px 24px rgba(0,0,0,0.25);
  --font: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  --container: 1200px;
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

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

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

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

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

.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(11, 11, 18, 0.9);
  backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--border);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
}

.brand-logo {
  font-size: 24px;
  font-weight: 800;
  letter-spacing: 0.5px;
  background: linear-gradient(135deg, var(--primary), #ff8a3d);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  white-space: nowrap;
}

.main-nav {
  display: flex;
  align-items: center;
  gap: 6px;
}

.main-nav a {
  position: relative;
  padding: 8px 16px;
  border-radius: 999px;
  font-size: 15px;
  color: var(--text-weak);
  font-weight: 500;
  transition: all 0.25s ease;
}

.main-nav a:hover {
  color: var(--text);
  background: rgba(255, 255, 255, 0.08);
}

.main-nav a.active {
  color: #fff;
  background: linear-gradient(135deg, rgba(255, 45, 85, 0.3), rgba(139, 92, 246, 0.3));
  box-shadow: inset 0 0 0 1px rgba(255, 45, 85, 0.4);
}

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

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 10px 24px;
  border-radius: 999px;
  font-size: 15px;
  font-weight: 600;
  line-height: 1.2;
  cursor: pointer;
  border: none;
  transition: all 0.25s ease;
  text-decoration: none;
}

.btn-primary {
  background: linear-gradient(135deg, var(--primary), #ff6a8a);
  color: #fff;
  box-shadow: 0 4px 20px rgba(255, 45, 85, 0.35);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 30px rgba(255, 45, 85, 0.5);
}

.btn-primary:active {
  transform: translateY(0);
}

.nav-toggle {
  display: none;
  background: none;
  border: none;
  width: 40px;
  height: 40px;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 5px;
  cursor: pointer;
  border-radius: 8px;
  transition: background 0.2s;
}

.nav-toggle span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--text);
  border-radius: 2px;
  transition: all 0.3s ease;
}

.nav-toggle:hover {
  background: rgba(255, 255, 255, 0.1);
}

@media (max-width: 991px) {
  .main-nav {
    position: fixed;
    top: 72px;
    left: 0;
    right: 0;
    background: var(--bg-deep);
    flex-direction: column;
    align-items: stretch;
    padding: 16px 24px 24px;
    border-bottom: 1px solid var(--border);
    transform: translateY(-120%);
    opacity: 0;
    visibility: hidden;
    transition: all 0.35s ease;
    gap: 6px;
    max-height: calc(100vh - 80px);
    overflow-y: auto;
    z-index: 99;
  }

  .main-nav.open {
    transform: translateY(0);
    opacity: 1;
    visibility: visible;
  }

  .main-nav a {
    padding: 14px 20px;
    font-size: 16px;
    border-radius: 12px;
  }

  .main-nav a.active {
    background: rgba(255, 45, 85, 0.12);
    box-shadow: none;
  }

  .nav-cta .btn-primary {
    display: none;
  }

  .nav-toggle {
    display: flex;
    margin-left: auto;
  }

  .nav-toggle.active span:nth-child(1) {
    transform: rotate(45deg) translate(5px, 5px);
  }

  .nav-toggle.active span:nth-child(2) {
    opacity: 0;
  }

  .nav-toggle.active span:nth-child(3) {
    transform: rotate(-45deg) translate(4px, -4px);
  }
}

.site-footer {
  padding: 64px 0 0;
  background: var(--bg-deep);
  border-top: 1px solid var(--border);
}

.footer-inner {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr;
  gap: 48px;
  padding-bottom: 40px;
}

.footer-brand p {
  margin-top: 12px;
  color: var(--text-mute);
  font-size: 14px;
  max-width: 360px;
  line-height: 1.6;
}

.footer-links {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.footer-links h4 {
  font-size: 16px;
  margin-bottom: 6px;
  color: var(--text);
}

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

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

.footer-bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 20px 0;
  border-top: 1px solid var(--border);
  color: var(--text-mute);
  font-size: 13px;
}

.article-main {
  padding: 60px 0 80px;
  min-height: 60vh;
}

.article-wrap {
  max-width: 920px;
  margin: 0 auto;
}

.article-entry {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 48px;
  box-shadow: var(--shadow-sm);
  position: relative;
  overflow: hidden;
}

.article-entry::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 4px;
  background: linear-gradient(90deg, var(--primary), var(--accent));
}

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

.article-header h1 {
  font-size: clamp(26px, 4vw, 36px);
  line-height: 1.35;
  font-weight: 800;
  letter-spacing: 0.5px;
  margin-bottom: 16px;
  color: var(--text);
}

.article-meta {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 16px;
  color: var(--text-mute);
  font-size: 14px;
}

.article-category {
  display: inline-flex;
  align-items: center;
  background: linear-gradient(135deg, rgba(255,45,85,0.15), rgba(139,92,246,0.15));
  color: #ff8fa9;
  border: 1px solid rgba(255,45,85,0.25);
  border-radius: 999px;
  padding: 4px 14px;
  font-size: 13px;
  font-weight: 500;
}

.article-date {
  color: var(--text-mute);
}

.article-content {
  font-size: 16px;
  line-height: 1.85;
  color: rgba(240,240,245,0.88);
}

.article-content h2,
.article-content h3,
.article-content h4 {
  color: var(--text);
  margin: 28px 0 14px;
  font-weight: 700;
  line-height: 1.4;
}

.article-content h2 {
  font-size: 24px;
}

.article-content h3 {
  font-size: 20px;
}

.article-content p {
  margin-bottom: 16px;
}

.article-content ul,
.article-content ol {
  margin: 16px 0;
  padding-left: 22px;
}

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

.article-content a {
  color: var(--primary);
  text-decoration: underline;
  text-underline-offset: 4px;
}

.article-content img {
  border-radius: var(--radius-sm);
  margin: 24px 0;
}

.article-content blockquote {
  border-left: 4px solid var(--primary);
  padding: 12px 20px;
  background: rgba(255,45,85,0.08);
  border-radius: 0 var(--radius-xs) var(--radius-xs) 0;
  margin: 24px 0;
  color: var(--text-weak);
}

.article-cta-box {
  margin-top: 40px;
  padding: 32px;
  background: linear-gradient(135deg, rgba(255,45,85,0.12), rgba(139,92,246,0.12));
  border: 1px solid rgba(255,45,85,0.2);
  border-radius: var(--radius);
  text-align: center;
}

.article-cta-box h2 {
  font-size: 24px;
  margin-bottom: 8px;
}

.article-cta-box p {
  color: var(--text-weak);
  margin-bottom: 20px;
}

.article-not-found {
  max-width: 600px;
  margin: 60px auto;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 60px 40px;
  text-align: center;
  box-shadow: var(--shadow-sm);
}

.article-not-found h1 {
  font-size: 28px;
  margin-bottom: 12px;
}

.article-not-found p {
  color: var(--text-weak);
  margin-bottom: 24px;
}

.related-section {
  padding: 48px 0 80px;
}

.related-section .section-title {
  font-size: 24px;
  font-weight: 700;
  text-align: center;
  margin-bottom: 32px;
}

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

.related-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  transition: all 0.3s ease;
  text-decoration: none;
  display: block;
}

.related-card:hover {
  transform: translateY(-4px);
  border-color: var(--border-strong);
  box-shadow: var(--shadow-sm);
}

.related-card img {
  width: 100%;
  height: 160px;
  object-fit: cover;
}

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

.related-card h3 {
  font-size: 18px;
  margin-bottom: 8px;
  color: var(--text);
}

.related-card p {
  font-size: 14px;
  color: var(--text-weak);
}

@media (max-width: 900px) {
  .related-grid {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 600px) {
  .article-entry {
    padding: 28px 20px;
  }

  .related-grid {
    grid-template-columns: 1fr;
  }

  .article-main {
    padding: 40px 0 60px;
  }

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

  .footer-bottom {
    flex-direction: column;
    text-align: center;
    gap: 8px;
  }
}

/* roulang page: category4 */
:root{
  --primary:#ff3c7e;
  --primary-dark:#d62068;
  --accent:#8b5cf6;
  --bg:#0b0812;
  --bg-alt:#120e1e;
  --bg-card:#1a1428;
  --bg-card-hover:#221a38;
  --text:#f4eef8;
  --text-muted:#b8aec8;
  --border:#2a2140;
  --radius:18px;
  --radius-sm:12px;
  --shadow:0 12px 36px rgba(0,0,0,.35);
  --shadow-sm:0 4px 16px rgba(0,0,0,.25);
  --transition:.25s ease;
}
*{box-sizing:border-box;margin:0;padding:0}
html,body{overflow-x:hidden}
body{font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei","Helvetica Neue",Arial,sans-serif; background:var(--bg); color:var(--text); line-height:1.7; font-size:16px}
img{max-width:100%; display:block}
a{color:inherit; text-decoration:none}
a,button,input{outline:none; transition:var(--transition)}
.container{width:100%; max-width:1220px; margin:0 auto; padding:0 24px}
/* ===== Header ===== */
.site-header{position:sticky; top:0; z-index:100; background:rgba(11,8,18,.88); backdrop-filter:blur(14px); border-bottom:1px solid rgba(255,255,255,.06)}
.header-inner{display:flex; align-items:center; justify-content:space-between; height:72px}
.brand-logo{font-size:22px; font-weight:800; letter-spacing:1px; background:linear-gradient(135deg,var(--primary),var(--accent)); -webkit-background-clip:text; background-clip:text; -webkit-text-fill-color:transparent; white-space:nowrap}
.main-nav{display:flex; gap:6px; align-items:center}
.main-nav a{padding:8px 14px; border-radius:8px; font-size:15px; font-weight:500; color:var(--text-muted)}
.main-nav a:hover{color:var(--text); background:rgba(255,255,255,.06)}
.main-nav a.active{color:#fff; background:linear-gradient(135deg,rgba(255,60,126,.25),rgba(139,92,246,.25)); box-shadow:inset 0 0 0 1px rgba(255,255,255,.1)}
.nav-cta{display:flex; align-items:center; gap:14px}
.btn{display:inline-flex; align-items:center; justify-content:center; padding:10px 24px; border-radius:999px; font-weight:700; font-size:15px; cursor:pointer; border:none; background:transparent}
.btn-primary{background:linear-gradient(135deg,var(--primary),var(--accent)); color:#fff; box-shadow:0 6px 18px rgba(255,60,126,.35)}
.btn-primary:hover{transform:translateY(-2px); box-shadow:0 10px 28px rgba(255,60,126,.5)}
.btn-outline{border:1px solid var(--border); color:var(--text)}
.btn-outline:hover{border-color:var(--primary); color:var(--primary); background:rgba(255,60,126,.08)}
.nav-toggle{display:none; width:42px; height:42px; background:none; border:1px solid var(--border); border-radius:10px; cursor:pointer; position:relative}
.nav-toggle span,.nav-toggle span::before,.nav-toggle span::after{content:""; position:absolute; width:22px; height:2px; background:var(--text); left:9px; border-radius:2px; transition:var(--transition)}
.nav-toggle span{top:20px}
.nav