/* roulang page: index */
/* ===== Design Variables ===== */
  :root {
    --bg-primary: #070D1C;
    --bg-secondary: #0C1528;
    --bg-footer: #04070E;
    --electric: #00E5FF;
    --cloud: #2F80FF;
    --amber: #FFB020;
    --text-white: #FFFFFF;
    --text-body: #C7D1E4;
    --text-muted: #7D8BB0;
    --card-border: rgba(0, 229, 255, 0.15);
    --card-bg: rgba(255, 255, 255, 0.05);
    --radius-lg: 24px;
    --radius-md: 16px;
    --radius-sm: 10px;
    --shadow-card: 0 8px 32px rgba(0, 0, 0, 0.4);
    --shadow-glow: 0 0 32px rgba(0, 229, 255, 0.15);
    --transition: all 0.3s ease-out;
  }

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

  html {
    scroll-behavior: smooth;
  }

  body {
    font-family: system-ui, -apple-system, "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
    background-color: var(--bg-primary);
    color: var(--text-body);
    line-height: 1.75;
    -webkit-font-smoothing: antialiased;
    overflow-x: hidden;
  }

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

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

  button {
    font-family: inherit;
    cursor: pointer;
  }

  .container-custom {
    max-width: 80rem;
    margin-left: auto;
    margin-right: auto;
    padding-left: 1rem;
    padding-right: 1rem;
  }

  @media (min-width: 640px) {
    .container-custom {
      padding-left: 1.5rem;
      padding-right: 1.5rem;
    }
  }

  @media (min-width: 1024px) {
    .container-custom {
      padding-left: 2rem;
      padding-right: 2rem;
    }
  }

  /* ===== Buttons ===== */
  .btn-primary {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.75rem 1.75rem;
    border-radius: 9999px;
    background: linear-gradient(135deg, var(--electric), var(--cloud));
    color: #04101F;
    font-weight: 700;
    font-size: 0.95rem;
    border: none;
    box-shadow: 0 0 24px rgba(0, 229, 255, 0.35);
    transition: var(--transition);
    position: relative;
    overflow: hidden;
    white-space: nowrap;
  }

  .btn-primary:hover {
    box-shadow: 0 0 40px rgba(0, 229, 255, 0.6);
    transform: translateY(-2px);
  }

  .btn-primary::after {
    content: "";
    position: absolute;
    top: 0;
    left: -100%;
    width: 50%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.3), transparent);
    transition: left 0.5s ease-out;
  }

  .btn-primary:hover::after {
    left: 120%;
  }

  .btn-primary:active {
    filter: brightness(0.9);
    transform: translateY(0);
  }

  .btn-primary:focus-visible {
    outline: 2px solid var(--electric);
    outline-offset: 3px;
  }

  .btn-ghost {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.75rem 1.75rem;
    border-radius: 9999px;
    background: rgba(255, 255, 255, 0.04);
    border: 1px solid rgba(255, 255, 255, 0.15);
    color: var(--text-white);
    font-weight: 600;
    font-size: 0.95rem;
    backdrop-filter: blur(12px);
    transition: var(--transition);
    white-space: nowrap;
  }

  .btn-ghost:hover {
    border-color: var(--electric);
    color: var(--electric);
    box-shadow: var(--shadow-glow);
    transform: translateY(-2px);
  }

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

  .btn-ghost:focus-visible {
    outline: 2px solid var(--electric);
    outline-offset: 3px;
  }

  .btn-lg {
    padding: 0.95rem 2.2rem;
    font-size: 1rem;
  }

  /* ===== Header & Navigation ===== */
  .site-header {
    position: sticky;
    top: 0;
    z-index: 1000;
    background: rgba(7, 13, 28, 0.82);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid rgba(0, 229, 255, 0.08);
    transition: var(--transition);
  }

  .site-header.scrolled {
    background: rgba(7, 13, 28, 0.94);
    box-shadow: 0 8px 30px rgba(0, 0, 0, 0.4);
  }

  .header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 72px;
    gap: 1rem;
  }

  .logo-main {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    flex-shrink: 0;
  }

  .logo-icon {
    width: 38px;
    height: 38px;
    border-radius: 10px;
    background: linear-gradient(135deg, var(--electric), var(--cloud));
    display: flex;
    align-items: center;
    justify-content: center;
    color: #04101F;
    font-size: 18px;
    font-weight: 900;
    box-shadow: 0 0 18px rgba(0, 229, 255, 0.3);
  }

  .logo-text {
    color: var(--text-white);
    font-size: 1.15rem;
    font-weight: 800;
    letter-spacing: 0.02em;
    line-height: 1.2;
  }

  .logo-text small {
    display: block;
    font-size: 0.7rem;
    font-weight: 500;
    color: var(--text-muted);
    letter-spacing: 0.08em;
  }

  .main-nav {
    display: flex;
    align-items: center;
    gap: 0.25rem;
  }

  .nav-link {
    position: relative;
    display: inline-block;
    padding: 0.5rem 1rem;
    color: #A0AEC0;
    font-size: 0.925rem;
    font-weight: 500;
    transition: var(--transition);
    border-radius: 8px;
  }

  .nav-link:hover {
    color: var(--text-white);
  }

  .nav-link:hover::after,
  .nav-link.active::after {
    content: "";
    position: absolute;
    bottom: 2px;
    left: 1rem;
    right: 1rem;
    height: 2px;
    background: var(--electric);
    border-radius: 2px;
    box-shadow: 0 0 8px rgba(0, 229, 255, 0.5);
  }

  .nav-link.active {
    color: var(--text-white);
  }

  .nav-actions {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    flex-shrink: 0;
  }

  .mega-trigger {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    padding: 0.5rem 1rem;
    border-radius: 9999px;
    background: transparent;
    border: 1px solid rgba(255, 255, 255, 0.12);
    color: var(--text-body);
    font-size: 0.875rem;
    font-weight: 500;
    transition: var(--transition);
  }

  .mega-trigger:hover {
    border-color: var(--electric);
    color: var(--electric);
    box-shadow: 0 0 16px rgba(0, 229, 255, 0.15);
  }

  .mega-trigger.active {
    border-color: var(--electric);
    color: var(--electric);
  }

  .mega-trigger i {
    transition: transform 0.3s ease;
    font-size: 0.75rem;
  }

  .mega-trigger.active i {
    transform: rotate(180deg);
  }

  .mega-wrap {
    position: relative;
  }

  .mega-panel {
    position: absolute;
    top: calc(100% + 12px);
    right: 0;
    width: 520px;
    background: rgba(13, 24, 48, 0.85);
    backdrop-filter: blur(20px);
    border: 1px solid rgba(0, 229, 255, 0.15);
    border-radius: 20px;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.5), 0 0 32px rgba(0, 229, 255, 0.08);
    padding: 1.5rem;
    opacity: 0;
    visibility: hidden;
    transform: translateY(12px);
    transition: all 0.25s ease-out;
    z-index: 999;
  }

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

  .mega-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1.5rem;
  }

  .mega-col-title {
    font-size: 0.75rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--text-muted);
    margin-bottom: 0.75rem;
  }

  .mega-link-list {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
  }

  .mega-link-list a {
    color: var(--text-body);
    font-size: 0.875rem;
    padding: 0.35rem 0.5rem;
    border-radius: 8px;
    transition: var(--transition);
  }

  .mega-link-list a:hover {
    color: var(--electric);
    background: rgba(0, 229, 255, 0.06);
    padding-left: 0.75rem;
  }

  .mega-entry-cards {
    display: flex;
    flex-direction: column;
    gap: 0.6rem;
  }

  .mega-entry-card {
    display: flex;
    align-items: center;
    gap: 0.6rem;
    padding: 0.65rem 0.85rem;
    border-radius: 12px;
    background: rgba(255, 255, 255, 0.04);
    border: 1px solid rgba(255, 255, 255, 0.06);
    transition: var(--transition);
  }

  .mega-entry-card:hover {
    background: rgba(0, 229, 255, 0.06);
    border-color: rgba(0, 229, 255, 0.2);
  }

  .mega-entry-card i {
    font-size: 1.25rem;
    color: var(--electric);
    width: 24px;
    text-align: center;
  }

  .mega-entry-card span {
    font-size: 0.85rem;
    color: var(--text-body);
    font-weight: 500;
  }

  .hamburger-btn {
    display: none;
    background: transparent;
    border: 1px solid rgba(255, 255, 255, 0.12);
    color: var(--text-white);
    width: 40px;
    height: 40px;
    border-radius: 10px;
    align-items: center;
    justify-content: center;
    font-size: 1.1rem;
    transition: var(--transition);
  }

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

  @media (max-width: 768px) {
    .main-nav,
    .mega-wrap {
      display: none;
    }
    .hamburger-btn {
      display: inline-flex;
    }
    .mega-trigger {
      display: none;
    }
  }

  .mobile-drawer {
    /* mobile drawer is handled as a slide-down panel */
  }

  /* ===== Hero ===== */
  .hero-section {
    position: relative;
    padding: 5rem 0 6rem;
    overflow: hidden;
  }

  .hero-bg {
    position: absolute;
    inset: 0;
    background-image: url('/assets/images/backpic/back-1.png');
    background-size: cover;
    background-position: center;
    z-index: 0;
  }

  .hero-bg::after {
    content: "";
    position: absolute;
    inset: 0;
    background: linear-gradient(180deg, rgba(7, 13, 28, 0.7) 0%, rgba(7, 13, 28, 0.85) 70%, var(--bg-primary) 100%);
  }

  .hero-bg::before {
    content: "";
    position: absolute;
    inset: 0;
    background-image: radial-gradient(circle at 20% 30%, rgba(0, 229, 255, 0.08) 0%, transparent 40%),
      radial-gradient(circle at 80% 70%, rgba(47, 128, 255, 0.1) 0%, transparent 35%);
    z-index: 1;
  }

  .hero-inner {
    position: relative;
    z-index: 2;
    display: grid;
    grid-template-columns: 1fr 340px;
    gap: 4rem;
    align-items: center;
  }

  .hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    padding: 0.3rem 0.9rem;
    border-radius: 9999px;
    background: rgba(0, 229, 255, 0.1);
    border: 1px solid rgba(0, 229, 255, 0.3);
    color: var(--electric);
    font-size: 0.75rem;
    font-weight: 600;
    margin-bottom: 1.5rem;
    letter-spacing: 0.04em;
  }

  .hero-badge::before {
    content: "";
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: var(--electric);
    animation: pulse-dot 1.6s infinite;
  }

  @keyframes pulse-dot {
    0%, 100% { opacity: 1; box-shadow: 0 0 0 0 rgba(0, 229, 255, 0.5); }
    50% { opacity: 0.6; box-shadow: 0 0 0 6px rgba(0, 229, 255, 0); }
  }

  .hero-title {
    font-size: clamp(2.5rem, 5.5vw, 3.75rem);
    font-weight: 900;
    line-height: 1.2;
    color: var(--text-white);
    letter-spacing: -0.01em;
    margin-bottom: 1.25rem;
  }

  .hero-title .highlight {
    background: linear-gradient(135deg, var(--electric), var(--cloud));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
  }

  .hero-subtitle {
    font-size: 1.05rem;
    color: var(--text-body);
    line-height: 1.8;
    max-width: 480px;
    margin-bottom: 2rem;
  }

  .hero-actions {
    display: flex;
    gap: 0.85rem;
    flex-wrap: wrap;
  }

  .hero-preview {
    position: relative;
  }

  .preview-frame {
    position: relative;
    width: 100%;
    max-width: 340px;
    aspect-ratio: 9 / 16;
    border-radius: 28px;
    overflow: hidden;
    border: 1px solid rgba(0, 229, 255, 0.2);
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.5), 0 0 40px rgba(0, 229, 255, 0.12);
    background: var(--bg-secondary);
  }

  .preview-frame::before {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.3), transparent);
    z-index: 2;
  }

  .preview-frame img {
    width: 100%;
    height: 100%;
    object-fit: cover;
  }

  .preview-overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(180deg, rgba(7, 13, 28, 0.2) 0%, transparent 40%, rgba(7, 13, 28, 0.7) 100%);
    z-index: 1;
  }

  .live-badge {
    position: absolute;
    top: 16px;
    left: 16px;
    z-index: 3;
    display: inline-flex;
    align-items: center;
    gap: 0.35rem;
    padding: 0.25rem 0.8rem;
    background: rgba(7, 13, 28, 0.7);
    border: 1px solid rgba(255, 255, 255, 0.12);
    border-radius: 9999px;
    color: var(--text-white);
    font-size: 0.75rem;
    font-weight: 600;
    backdrop-filter: blur(8px);
  }

  .live-badge::before {
    content: "";
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: var(--electric);
    animation: pulse-dot 1.4s infinite;
  }

  .scroll-indicator {
    position: absolute;
    bottom: 2rem;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.3rem;
    color: var(--text-muted);
    font-size: 0.75rem;
    z-index: 2;
    transition: color 0.3s;
  }

  .scroll-indicator:hover {
    color: var(--electric);
  }

  .scroll-indicator i {
    animation: bounce-down 2s infinite;
  }

  @keyframes bounce-down {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(6px); }
  }

  @media (max-width: 900px) {
    .hero-inner {
      grid-template-columns: 1fr;
      text-align: center;
    }
    .hero-subtitle {
      margin-left: auto;
      margin-right: auto;
    }
    .hero-actions {
      justify-content: center;
    }
    .hero-preview {
      display: flex;
      justify-content: center;
    }
    .preview-frame {
      max-width: 260px;
    }
  }

  /* ===== Section Common ===== */
  .section-pad {
    padding: 4.5rem 0;
  }

  @media (min-width: 768px) {
    .section-pad {
      padding: 6rem 0;
    }
  }

  .section-heading {
    text-align: center;
    margin-bottom: 3rem;
  }

  .section-heading .overline {
    display: inline-block;
    font-size: 0.8rem;
    font-weight: 700;
    letter-spacing: 0.08em;
    color: var(--electric);
    text-transform: uppercase;
    margin-bottom: 0.5rem;
  }

  .section-heading h2 {
    font-size: clamp(1.75rem, 3vw, 2.5rem);
    font-weight: 800;
    color: var(--text-white);
    line-height: 1.25;
    margin-bottom: 0.75rem;
  }

  .section-heading p {
    max-width: 560px;
    margin: 0 auto;
    color: var(--text-muted);
    font-size: 0.95rem;
  }

  /* ===== Cards / Content ===== */
  .glass-card {
    background: var(--card-bg);
    backdrop-filter: blur(12px);
    border: 1px solid var(--card-border);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-card);
    position: relative;
    overflow: hidden;
    transition: var(--transition);
  }

  .glass-card::before {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.12), transparent);
  }

  .glass-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 16px 40px rgba(0, 0, 0, 0.5), 0 0 32px rgba(0, 229, 255, 0.12);
    border-color: rgba(0, 229, 255, 0.25);
  }

  .feature-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1.25rem;
  }

  .feature-card {
    padding: 1.75rem;
  }

  .feature-card.large {
    grid-column: span 2;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1.5rem;
    align-items: center;
  }

  .feature-card .card-tag {
    display: inline-block;
    padding: 0.15rem 0.7rem;
    border-radius: 9999px;
    background: rgba(0, 229, 255, 0.1);
    border: 1px solid rgba(0, 229, 255, 0.25);
    color: var(--electric);
    font-size: 0.72rem;
    font-weight: 600;
    margin-bottom: 0.8rem;
  }

  .feature-card h3 {
    font-size: 1.15rem;
    font-weight: 700;
    color: var(--text-white);
    line-height: 1.4;
    margin-bottom: 0.5rem;
  }

  .feature-card p {
    font-size: 0.875rem;
    color: var(--text-muted);
    line-height: 1.65;
  }

  .feature-card .card-icon {
    font-size: 2rem;
    color: var(--electric);
    margin-bottom: 0.75rem;
  }

  .feature-card .play-btn {
    width: 56px;
    height: 56px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--electric), var(--cloud));
    display: flex;
    align-items: center;
    justify-content: center;
    color: #04101F;
    font-size: 1.2rem;
    box-shadow: 0 0 24px rgba(0, 229, 255, 0.35);
    transition: var(--transition);
  }

  .feature-card:hover .play-btn {
    transform: scale(1.1) rotate(10deg);
  }

  .feature-card img {
    border-radius: 14px;
    object-fit: cover;
    width: 100%;
    height: 100%;
    max-height: 180px;
  }

  @media (max-width: 768px) {
    .feature-grid {
      grid-template-columns: 1fr;
    }
    .feature-card.large {
      grid-column: span 1;
      grid-template-columns: 1fr;
    }
  }

  /* ===== Checklist ===== */
  .checklist-panel {
    background: linear-gradient(135deg, rgba(255, 255, 255, 0.04), rgba(255, 255, 255, 0.01));
    backdrop-filter: blur(12px);
    border: 1px solid var(--card-border);
    border-radius: 32px;
    padding: 2.5rem;
    position: relative;
    overflow: hidden;
  }

  .checklist-panel::before {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: linear-gradient(90deg, transparent, var(--electric), transparent);
  }

  .checklist-panel::after {
    content: "";
    position: absolute;
    bottom: -60px;
    right: -60px;
    width: 180px;
    height: 180px;
    background: radial-gradient(circle, rgba(0, 229, 255, 0.08), transparent 70%);
    border-radius: 50%;
  }

  .checklist-item {
    display: flex;
    align-items: flex-start;
    gap: 1.5rem;
    padding: 1.1rem 0;
    border-bottom: 1px solid rgba(255, 255, 255, 0.06);
    transition: var(--transition);
  }

  .checklist-item:last-child {
    border-bottom: none;
  }

  .checklist-item:hover {
    padding-left: 0.75rem;
  }

  .checklist-num {
    font-size: 2rem;
    font-weight: 900;
    color: transparent;
    -webkit-text-stroke: 1px var(--electric);
    line-height: 1;
    min-width: 60px;
    transition: var(--transition);
  }

  .checklist-item:hover .checklist-num {
    -webkit-text-stroke: 1px var(--amber);
  }

  .checklist-body {
    flex: 1;
  }

  .checklist-body h3 {
    font-size: 1.05rem;
    font-weight: 700;
    color: var(--text-white);
    margin-bottom: 0.2rem;
  }

  .checklist-body p {
    font-size: 0.875rem;
    color: var(--text-muted);
  }

  .checklist-link {
    align-self: center;
    color: var(--text-muted);
    font-size: 0.9rem;
    transition: var(--transition);
  }

  .checklist-item:hover .checklist-link {
    color: var(--electric);
    transform: translateX(4px);
  }

  @media (max-width: 640px) {
    .checklist-panel {
      padding: 1.5rem;
    }
    .checklist-num {
      font-size: 1.5rem;
      min-width: 40px;
    }
  }

  /* ===== Testimonials ===== */
  .testimonial-section {
    background: var(--bg-secondary);
    position: relative;
    overflow: hidden;
  }

  .testimonial-section::before {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: linear-gradient(90deg, transparent, rgba(0, 229, 255, 0.3), transparent);
  }

  .testimonial-marquee {
    display: flex;
    gap: 1.25rem;
    overflow-x: auto;
    padding: 1rem 0 1.5rem;
    scrollbar-width: thin;
    scrollbar-color: var(--electric) transparent;
  }

  .testimonial-marquee::-webkit-scrollbar {
    height: 4px;
  }

  .testimonial-marquee::-webkit-scrollbar-track {
    background: transparent;
  }

  .testimonial-marquee::-webkit-scrollbar-thumb {
    background: rgba(0, 229, 255, 0.3);
    border-radius: 4px;
  }

  .testimonial-card {
    flex-shrink: 0;
    width: 300px;
    padding: 1.5rem;
    border-radius: 20px;
    background: rgba(255, 255, 255, 0.04);
    border: 1px solid rgba(255, 255, 255, 0.08);
    backdrop-filter: blur(8px);
    transition: var(--transition);
  }

  .testimonial-card:hover {
    border-color: rgba(0, 229, 255, 0.25);
    box-shadow: var(--shadow-glow);
  }

  .testimonial-stars {
    color: var(--amber);
    font-size: 0.85rem;
    margin-bottom: 0.6rem;
    letter-spacing: 0.1em;
  }

  .testimonial-card p {
    font-size: 0.9rem;
    color: var(--text-body);
    line-height: 1.7;
    margin-bottom: 0.8rem;
  }

  .testimonial-author {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.8rem;
    color: var(--text-muted);
    font-weight: 500;
  }

  .testimonial-author i {
    color: var(--electric);
  }

  .security-strip {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 1.5rem;
    flex-wrap: wrap;
    padding: 0.6rem 0;
    color: var(--text-muted);
    font-size: 0.8rem;
  }

  .security-strip i {
    color: var(--electric);
    margin-right: 0.3rem;
  }

  /* ===== CTA Banner ===== */
  .cta-banner {
    position: relative;
    border-radius: 32px;
    padding: 3.5rem;
    background: linear-gradient(135deg, rgba(0, 229, 255, 0.06), rgba(47, 128, 255, 0.04)),
      rgba(255, 255, 255, 0.02);
    border: 1px solid var(--card-border);
    backdrop-filter: blur(16px);
    overflow: hidden;
    text-align: center;
  }

  .cta-banner::before {
    content: "";
    position: absolute;
    top: -80px;
    left: -80px;
    width: 250px;
    height: 250px;
    background: radial-gradient(circle, rgba(0, 229, 255, 0.12), transparent 70%);
    border-radius: 50%;
    animation: float-glow 6s ease-in-out infinite alternate;
  }

  .cta-banner::after {
    content: "";
    position: absolute;
    bottom: -40px;
    right: -40px;
    width: 180px;
    height: 180px;
    background: radial-gradient(circle, rgba(47, 128, 255, 0.15), transparent 70%);
    border-radius: 50%;
  }

  @keyframes float-glow {
    0% { transform: translate(0, 0) scale(1); opacity: 0.6; }
    100% { transform: translate(30px, 20px) scale(1.2); opacity: 1; }
  }

  .cta-banner h2 {
    font-size: clamp(1.5rem, 3vw, 2.2rem);
    font-weight: 800;
    color: var(--text-white);
    margin-bottom: 0.8rem;
    position: relative;
    z-index: 1;
  }

  .cta-banner p {
    font-size: 0.95rem;
    color: var(--text-body);
    margin-bottom: 1.75rem;
    position: relative;
    z-index: 1;
  }

  .cta-actions {
    display: flex;
    gap: 0.85rem;
    justify-content: center;
    flex-wrap: wrap;
    position: relative;
    z-index: 1;
  }

  @media (max-width: 640px) {
    .cta-banner {
      padding: 2rem 1.25rem;
    }
  }

  /* ===== News List ===== */
  .news-section {
    background: var(--bg-secondary);
  }

  .news-list {
    display: flex;
    flex-direction: column;
    gap: 1rem;
    max-width: 860px;
    margin: 0 auto;
  }

  .news-item {
    display: flex;
    align-items: stretch;
    gap: 1.25rem;
    padding: 1.25rem 1.5rem;
    border-radius: 18px;
    background: rgba(255, 255, 255, 0.04);
    border: 1px solid rgba(255, 255, 255, 0.07);
    backdrop-filter: blur(12px);
    transition: var(--transition);
    position: relative;
    overflow: hidden;
  }

  .news-item::before {
    content: "";
    position: absolute;
    left: 0;
    top: 0;
    bottom: 0;
    width: 3px;
    background: linear-gradient(180deg, var(--electric), var(--cloud));
    opacity: 0;
    transition: opacity 0.3s ease;
    border-radius: 0 3px 3px 0;
  }

  .news-item:hover {
    transform: translateY(-3px);
    box-shadow: 0 12px 32px rgba(0, 0, 0, 0.35), 0 0 24px rgba(0, 229, 255, 0.08);
    border-color: rgba(0, 229, 255, 0.18);
    background: rgba(255, 255, 255, 0.06);
  }

  .news-item:hover::before {
    opacity: 1;
  }

  .news-date {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    min-width: 56px;
    padding: 0.5rem 0.75rem;
    border-radius: 12px;
    background: rgba(0, 229, 255, 0.06);
    border: 1px solid rgba(0, 229, 255, 0.15);
  }

  .news-date .day {
    font-size: 1.5rem;
    font-weight: 800;
    color: var(--electric);
    line-height: 1.2;
  }

  .news-date .month {
    font-size: 0.7rem;
    color: var(--text-muted);
  }

  .news-body {
    flex: 1;
    min-width: 0;
  }

  .news-body .tag {
    display: inline-block;
    padding: 0.1rem 0.6rem;
    border-radius: 6px;
    background: rgba(0, 229, 255, 0.08);
    color: var(--electric);
    font-size: 0.7rem;
    font-weight: 600;
    margin-bottom: 0.35rem;
  }

  .news-body h3 {
    font-size: 1rem;
    font-weight: 700;
    color: var(--text-white);
    line-height: 1.4;
    margin-bottom: 0.25rem;
    transition: color 0.3s;
  }

  .news-body h3:hover {
    color: var(--electric);
  }

  .news-body p {
    font-size: 0.85rem;
    color: var(--text-muted);
    line-height: 1.6;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
  }

  .news-link {
    display: flex;
    align-items: center;
    justify-content: center;
    min-width: 36px;
    color: var(--text-muted);
    font-size: 1rem;
    transition: var(--transition);
  }

  .news-item:hover .news-link {
    color: var(--electric);
    transform: translateX(4px);
  }

  .empty-state {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 3.5rem 2rem;
    border-radius: 24px;
    background: rgba(255, 255, 255, 0.03);
    border: 1px dashed rgba(0, 229, 255, 0.2);
    text-align: center;
  }

  .empty-state i {
    font-size: 2.5rem;
    color: var(--text-muted);
    margin-bottom: 0.8rem;
  }

  .empty-state p {
    color: var(--text-body);
    font-size: 1rem;
  }

  .empty-state small {
    color: var(--text-muted);
    font-size: 0.8rem;
    margin-top: 0.3rem;
  }

  @media (max-width: 640px) {
    .news-item {
      flex-direction: column;
      gap: 0.75rem;
      padding: 1rem;
    }
    .news-date {
      flex-direction: row;
      min-width: auto;
      gap: 0.5rem;
      padding: 0.3rem 0.8rem;
      align-self: flex-start;
    }
    .news-date .day {
      font-size: 1rem;
    }
    .news-link {
      display: none;
    }
  }

  /* ===== FAQ ===== */
  .faq-wrap {
    max-width: 760px;
    margin: 0 auto;
  }

  .faq-item {
    border-radius: 16px;
    background: rgba(255, 255, 255, 0.04);
    border: 1px solid rgba(255, 255, 255, 0.08);
    backdrop-filter: blur(8px);
    margin-bottom: 1rem;
    overflow: hidden;
    transition: var(--transition);
  }

  .faq-item:hover {
    border-color: rgba(0, 229, 255, 0.2);
  }

  .faq-question {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
    padding: 1.1rem 1.5rem;
    cursor: pointer;
    user-select: none;
    color: var(--text-white);
    font-weight: 600;
    font-size: 0.95rem;
    transition: color 0.3s;
    border: none;
    background: transparent;
    width: 100%;
    text-align: left;
  }

  .faq-question:hover {
    color: var(--electric);
  }

  .faq-question i {
    font-size: 0.85rem;
    color: var(--text-muted);
    transition: transform 0.35s ease, color 0.3s;
    flex-shrink: 0;
  }

  .faq-item.active .faq-question i {
    transform: rotate(45deg);
    color: var(--electric);
  }

  .faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.4s ease-out;
    padding: 0 1.5rem;
    color: var(--text-muted);
    font-size: 0.9rem;
    line-height: 1.8;
  }

  .faq-item.active .faq-answer {
    max-height: 300px;
    padding-bottom: 1.2rem;
  }

  /* ===== Footer ===== */
  .site-footer {
    background: var(--bg-footer);
    border-top: 1px solid rgba(0, 229, 255, 0.06);
    padding: 4rem 0 0;
    position: relative;
  }

  .site-footer::before {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: linear-gradient(90deg, transparent, rgba(0, 229, 255, 0.2), transparent);
  }

  .footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: 2.5rem;
    padding-bottom: 3rem;
  }

  .footer-brand p {
    font-size: 0.875rem;
    color: var(--text-muted);
    line-height: 1.7;
    margin-top: 1rem;
    max-width: 300px;
  }

  .footer-title {
    font-size: 0.95rem;
    font-weight: 700;
    color: var(--text-white);
    margin-bottom: 0.8rem;
  }

  .footer-links {
    display: flex;
    flex-direction: column;
    gap: 0.4rem;
  }

  .footer-links a {
    font-size: 0.85rem;
    color: var(--text-muted);
    transition: var(--transition);
  }

  .footer-links a:hover {
    color: var(--electric);
    padding-left: 4px;
  }

  .footer-contact {
    font-size: 0.85rem;
    color: var(--text-muted);
    line-height: 2;
  }

  .footer-contact i {
    color: var(--electric);
    margin-right: 0.4rem;
    width: 16px;
  }

  .footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.06);
    padding: 1.25rem 0;
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 0.75rem;
  }

  .footer-bottom p {
    font-size: 0.8rem;
    color: var(--text-muted);
  }

  .back-to-top {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(255, 255, 255, 0.06);
    border: 1px solid rgba(255, 255, 255, 0.12);
    color: var(--text-muted);
    font-size: 1rem;
    transition: var(--transition);
  }

  .back-to-top:hover {
    border-color: var(--electric);
    color: var(--electric);
    transform: translateY(-4px);
    box-shadow: 0 0 20px rgba(0, 229, 255, 0.15);
  }

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

  @media (max-width: 520px) {
    .footer-grid {
      grid-template-columns: 1fr;
      gap: 2rem;
    }
    .footer-bottom {
      flex-direction: column;
      text-align: center;
    }
  }

  /* ===== Signal decorations ===== */
  .signal-line {
    position: absolute;
    height: 2px;
    background: linear-gradient(90deg, transparent, var(--electric), transparent);
    border-radius: 2px;
    opacity: 0.5;
  }

  .section-divider {
    height: 1px;
    max-width: 1200px;
    margin: 0 auto;
    background: linear-gradient(90deg, transparent, rgba(0, 229, 255, 0.1), transparent);
  }

  /* ===== Scrollbar ===== */
  ::-webkit-scrollbar {
    width: 6px;
  }

  ::-webkit-scrollbar-track {
    background: var(--bg-primary);
  }

  ::-webkit-scrollbar-thumb {
    background: rgba(0, 229, 255, 0.2);
    border-radius: 3px;
  }

  ::-webkit-scrollbar-thumb:hover {
    background: rgba(0, 229, 255, 0.4);
  }

  /* focus-visible for accessibility */
  a:focus-visible,
  button:focus-visible {
    outline: 2px solid var(--electric);
    outline-offset: 2px;
    border-radius: 4px;
  }

  /* Mobile drawer */
  .mobile-drawer {
    display: none;
    background: rgba(7, 13, 28, 0.98);
    border-top: 1px solid rgba(0, 229, 255, 0.12);
    padding: 1rem 1.25rem 1.5rem;
  }

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

  .mobile-drawer a {
    display: block;
    padding: 0.7rem 0.5rem;
    color: var(--text-body);
    font-size: 0.95rem;
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
    transition: var(--transition);
  }

  .mobile-drawer a:hover,
  .mobile-drawer a.active {
    color: var(--electric);
  }

  .mobile-drawer a i {
    margin-right: 0.5rem;
    color: var(--electric);
  }

/* roulang page: article */
:root {
            --bg-primary: #070D1C;
            --bg-secondary: #0C1528;
            --bg-footer: #04070E;
            --accent: #00E5FF;
            --accent-blue: #2F80FF;
            --accent-orange: #FFB020;
            --text-primary: #FFFFFF;
            --text-secondary: #C7D1E4;
            --text-muted: #7D8BB0;
            --border-glass: rgba(0, 229, 255, 0.15);
            --card-bg: rgba(255, 255, 255, 0.05);
            --radius-card: 20px;
            --radius-hero: 32px;
            --shadow-card: 0 8px 32px rgba(0, 0, 0, 0.4);
            --transition: all 0.3s ease-out;
        }
        * {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: system-ui, -apple-system, "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
            background-color: var(--bg-primary);
            color: var(--text-secondary);
            line-height: 1.75;
            -webkit-font-smoothing: antialiased;
        }
        body.fixed-body {
            overflow: hidden;
        }
        img {
            max-width: 100%;
            display: block;
        }
        a {
            text-decoration: none;
            color: inherit;
            transition: var(--transition);
        }
        button {
            font-family: inherit;
            cursor: pointer;
            border: none;
            background: none;
        }
        .container-custom {
            max-width: 1280px;
            margin: 0 auto;
            padding: 0 1.25rem;
        }
        @media (min-width: 640px) {
            .container-custom {
                padding: 0 1.5rem;
            }
        }
        @media (min-width: 1024px) {
            .container-custom {
                padding: 0 2rem;
            }
        }
        .section-space {
            padding: 4rem 0;
        }
        @media (min-width: 768px) {
            .section-space {
                padding: 6rem 0;
            }
        }
        .main-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 100;
            background: rgba(7, 13, 28, 0.82);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            border-bottom: 1px solid rgba(0, 229, 255, 0.08);
            transition: var(--transition);
        }
        .main-header.scrolled {
            box-shadow: 0 8px 40px rgba(0, 0, 0, 0.5);
            background: rgba(7, 13, 28, 0.92);
        }
        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 72px;
            gap: 1rem;
        }
        .logo-main {
            display: flex;
            align-items: center;
            gap: 0.6rem;
            flex-shrink: 0;
        }
        .logo-icon {
            width: 38px;
            height: 38px;
            border-radius: 12px;
            background: linear-gradient(135deg, var(--accent), var(--accent-blue));
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 16px;
            color: #04101F;
            box-shadow: 0 0 18px rgba(0, 229, 255, 0.3);
        }
        .logo-text {
            font-size: 1.15rem;
            font-weight: 900;
            color: #fff;
            line-height: 1.3;
            display: flex;
            flex-direction: column;
        }
        .logo-text small {
            font-size: 0.65rem;
            font-weight: 600;
            color: var(--accent);
            letter-spacing: 0.15em;
            text-transform: uppercase;
            margin-top: -2px;
        }
        .main-nav {
            display: flex;
            align-items: center;
            gap: 0.35rem;
        }
        .nav-link {
            padding: 0.4rem 0.9rem;
            font-size: 0.9rem;
            color: #A0AEC0;
            border-radius: 999px;
            font-weight: 500;
            position: relative;
            transition: var(--transition);
            white-space: nowrap;
        }
        .nav-link:hover {
            color: #fff;
        }
        .nav-link::after {
            content: "";
            position: absolute;
            left: 50%;
            bottom: 0;
            width: 0;
            height: 2px;
            background: var(--accent);
            border-radius: 2px;
            transform: translateX(-50%);
            transition: width 0.3s ease;
        }
        .nav-link:hover::after {
            width: 60%;
        }
        .nav-link.active {
            color: var(--accent);
            background: rgba(0, 229, 255, 0.08);
        }
        .nav-link.active::after {
            width: 60%;
        }
        .nav-actions {
            display: flex;
            align-items: center;
            gap: 0.5rem;
        }
        .btn-menu {
            width: 38px;
            height: 38px;
            border-radius: 10px;
            display: flex;
            align-items: center;
            justify-content: center;
            border: 1px solid rgba(255, 255, 255, 0.1);
            color: #fff;
            font-size: 15px;
            background: rgba(255, 255, 255, 0.05);
            transition: var(--transition);
        }
        .btn-menu:hover {
            border-color: var(--accent);
            color: var(--accent);
        }
        .btn-primary {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 0.4rem;
            background: linear-gradient(135deg, var(--accent), var(--accent-blue));
            color: #04101F;
            font-weight: 700;
            font-size: 0.88rem;
            padding: 0.55rem 1.4rem;
            border-radius: 999px;
            box-shadow: 0 0 24px rgba(0, 229, 255, 0.35);
            transition: var(--transition);
            position: relative;
            overflow: hidden;
            white-space: nowrap;
        }
        .btn-primary::before {
            content: "";
            position: absolute;
            top: 0;
            left: -80%;
            width: 40%;
            height: 100%;
            background: rgba(255, 255, 255, 0.4);
            transform: skewX(-20deg);
            transition: left 0.4s ease;
        }
        .btn-primary:hover {
            box-shadow: 0 0 40px rgba(0, 229, 255, 0.6);
            transform: translateY(-1px);
        }
        .btn-primary:hover::before {
            left: 120%;
        }
        .btn-primary:active {
            transform: translateY(1px);
            filter: brightness(0.92);
        }
        .btn-primary:focus-visible {
            outline: 2px solid var(--accent);
            outline-offset: 3px;
        }
        .btn-secondary {
            display: inline-flex;
            align-items: center;
            gap: 0.4rem;
            background: rgba(255, 255, 255, 0.06);
            border: 1px solid rgba(255, 255, 255, 0.12);
            color: #fff;
            font-size: 0.88rem;
            font-weight: 600;
            padding: 0.55rem 1.5rem;
            border-radius: 999px;
            transition: var(--transition);
        }
        .btn-secondary:hover {
            border-color: var(--accent);
            color: var(--accent);
            background: rgba(0, 229, 255, 0.08);
        }
        .btn-secondary:active {
            transform: scale(0.98);
        }
        .btn-secondary:focus-visible {
            outline: 2px solid var(--accent);
            outline-offset: 3px;
        }
        .btn-text {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            color: var(--accent);
            font-weight: 600;
            font-size: 0.88rem;
            transition: var(--transition);
        }
        .btn-text i {
            transition: transform 0.3s ease;
        }
        .btn-text:hover i {
            transform: translateX(4px);
        }
        .btn-text:focus-visible {
            outline: 2px solid var(--accent);
            outline-offset: 3px;
            border-radius: 4px;
        }
        .mobile-menu {
            display: none;
            background: rgba(13, 24, 48, 0.95);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            border-top: 1px solid rgba(0, 229, 255, 0.1);
            padding: 1rem 1.25rem 1.5rem;
        }
        .mobile-menu.open {
            display: block;
        }
        .mobile-menu .nav-link {
            display: block;
            padding: 0.7rem 0.5rem;
            border-radius: 10px;
            font-size: 0.95rem;
        }
        .mobile-menu .nav-link:hover {
            background: rgba(0, 229, 255, 0.06);
        }
        .mobile-menu .nav-link.active {
            background: rgba(0, 229, 255, 0.1);
        }
        .mobile-menu .btn-primary {
            width: 100%;
            margin-top: 0.8rem;
        }
        .breadcrumb {
            padding: 6rem 0 1rem;
            font-size: 0.8rem;
            color: var(--text-muted);
        }
        .breadcrumb a {
            color: var(--text-muted);
        }
        .breadcrumb a:hover {
            color: var(--accent);
        }
        .breadcrumb .sep {
            margin: 0 8px;
            color: #445;
        }
        .article-header {
            padding: 1.5rem 0 2rem;
        }
        .article-tag {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            border: 1px solid rgba(0, 229, 255, 0.35);
            background: rgba(0, 229, 255, 0.1);
            color: var(--accent);
            font-size: 0.75rem;
            font-weight: 700;
            padding: 0.25rem 0.9rem;
            border-radius: 999px;
            letter-spacing: 0.02em;
            margin-bottom: 1rem;
        }
        .article-title {
            font-size: clamp(1.8rem, 4vw, 2.6rem);
            font-weight: 900;
            line-height: 1.35;
            color: #fff;
            margin-bottom: 1rem;
        }
        .article-meta {
            display: flex;
            align-items: center;
            flex-wrap: wrap;
            gap: 1rem 1.5rem;
            color: var(--text-muted);
            font-size: 0.82rem;
            margin-bottom: 1.5rem;
        }
        .article-meta span {
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }
        .article-meta i {
            color: var(--accent);
            font-size: 0.8rem;
        }
        .article-cover {
            border-radius: var(--radius-card);
            overflow: hidden;
            margin-bottom: 2rem;
            border: 1px solid var(--border-glass);
            box-shadow: var(--shadow-card);
        }
        .article-cover img {
            width: 100%;
            height: auto;
            object-fit: cover;
        }
        .article-cover figcaption {
            padding: 0.75rem 1rem;
            font-size: 0.78rem;
            color: var(--text-muted);
            background: rgba(255, 255, 255, 0.03);
            text-align: center;
        }
        .article-body-container {
            max-width: 860px;
            margin: 0 auto;
        }
        .article-content {
            font-size: 1rem;
            line-height: 1.85;
            color: var(--text-secondary);
        }
        .article-content p {
            margin-bottom: 1.5rem;
        }
        .article-content h2 {
            font-size: 1.7rem;
            font-weight: 800;
            color: #fff;
            margin: 2.5rem 0 1rem;
            line-height: 1.4;
        }
        .article-content h3 {
            font-size: 1.3rem;
            font-weight: 700;
            color: #fff;
            margin: 2rem 0 0.75rem;
        }
        .article-content h4 {
            font-size: 1.1rem;
            font-weight: 600;
            color: #E8EDF7;
            margin: 1.5rem 0 0.5rem;
        }
        .article-content ul,
        .article-content ol {
            margin: 0 0 1.5rem 1.5rem;
        }
        .article-content ul li,
        .article-content ol li {
            margin-bottom: 0.5rem;
        }
        .article-content ul li::marker {
            color: var(--accent);
        }
        .article-content blockquote {
            border-left: 4px solid var(--accent);
            background: rgba(0, 229, 255, 0.06);
            padding: 1rem 1.25rem;
            border-radius: 0 16px 16px 0;
            margin: 1.5rem 0;
            color: #A9BCD4;
            font-style: normal;
        }
        .article-content blockquote p {
            margin-bottom: 0;
        }
        .article-content a {
            color: var(--accent);
            text-decoration: underline;
            text-underline-offset: 3px;
        }
        .article-content a:hover {
            color: #fff;
        }
        .article-content img {
            border-radius: 16px;
            margin: 1.5rem 0;
        }
        .article-content code {
            background: rgba(0, 229, 255, 0.18);
            color: var(--accent);
            padding: 0.15rem 0.4rem;
            border-radius: 6px;
            font-size: 0.9em;
        }
        .article-content pre {
            background: #0A1122;
            border: 1px solid rgba(255, 255, 255, 0.08);
            border-radius: 16px;
            padding: 1.25rem;
            overflow-x: auto;
            margin: 1.5rem 0;
            color: #C7D1E4;
            font-size: 0.88rem;
            line-height: 1.7;
        }
        .article-content pre code {
            background: none;
            color: inherit;
            padding: 0;
        }
        .article-content mark {
            background: rgba(0, 229, 255, 0.2);
            color: #fff;
            padding: 0.1em 0.3em;
            border-radius: 4px;
        }
        .article-content table {
            width: 100%;
            border-collapse: collapse;
            margin: 1.5rem 0;
            font-size: 0.9rem;
        }
        .article-content th {
            background: rgba(0, 229, 255, 0.08);
            color: #fff;
            text-align: left;
            padding: 0.75rem 1rem;
            border-bottom: 1px solid rgba(255, 255, 255, 0.08);
        }
        .article-content td {
            padding: 0.75rem 1rem;
            border-bottom: 1px solid rgba(255, 255, 255, 0.05);
        }
        .article-content hr {
            border: none;
            height: 1px;
            background: linear-gradient(90deg, transparent, var(--accent), transparent);
            margin: 2.5rem 0;
            opacity: 0.4;
        }
        .not-found-card {
            text-align: center;
            padding: 4rem 1.5rem;
            border-radius: var(--radius-card);
            background: rgba(255, 255, 255, 0.03);
            border: 1px solid var(--border-glass);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
        }
        .not-found-card i {
            font-size: 2.5rem;
            color: var(--accent);
            margin-bottom: 1rem;
        }
        .not-found-card h2 {
            color: #fff;
            font-size: 1.4rem;
            margin-bottom: 0.75rem;
        }
        .not-found-card p {
            color: var(--text-muted);
            margin-bottom: 1.5rem;
            font-size: 0.9rem;
        }
        .related-section {
            padding: 3rem 0 4rem;
            border-top: 1px solid rgba(255, 255, 255, 0.05);
        }
        .related-title {
            font-size: 1.5rem;
            font-weight: 800;
            color: #fff;
            margin-bottom: 1.5rem;
            display: flex;
            align-items: center;
            gap: 0.75rem;
        }
        .related-title::before {
            content: "";
            width: 4px;
            height: 26px;
            background: linear-gradient(180deg, var(--accent), var(--accent-blue));
            border-radius: 4px;
        }
        .related-grid {
            display: grid;
            gap: 1.5rem;
            grid-template-columns: 1fr;
        }
        @media (min-width: 640px) {
            .related-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }
        @media (min-width: 1024px) {
            .related-grid {
                grid-template-columns: repeat(3, 1fr);
            }
        }
        .related-card {
            background: rgba(255, 255, 255, 0.04);
            border: 1px solid rgba(255, 255, 255, 0.08);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border-radius: var(--radius-card);
            overflow: hidden;
            transition: var(--transition);
            box-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
            display: flex;
            flex-direction: column;
        }
        .related-card:hover {
            transform: translateY(-4px);
            border-color: var(--border-glass);
            box-shadow: 0 8px 32px rgba(0, 0, 0, 0.45), 0 0 32px rgba(0, 229, 255, 0.12);
        }
        .related-card .thumb {
            aspect-ratio: 16/10;
            overflow: hidden;
            background: #0A1122;
        }
        .related-card .thumb img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.4s ease;
        }
        .related-card:hover .thumb img {
            transform: scale(1.05);
        }
        .related-card .body {
            padding: 1rem 1.25rem 1.25rem;
            flex: 1;
            display: flex;
            flex-direction: column;
        }
        .related-card .tag {
            font-size: 0.7rem;
            color: var(--accent);
            font-weight: 700;
            letter-spacing: 0.05em;
            margin-bottom: 0.4rem;
        }
        .related-card h3 {
            font-size: 0.98rem;
            font-weight: 700;
            color: #fff;
            line-height: 1.55;
            margin-bottom: 0.5rem;
        }
        .related-card h3 a:hover {
            color: var(--accent);
        }
        .related-card p {
            font-size: 0.82rem;
            color: var(--text-muted);
            line-height: 1.6;
        }
        .cta-section {
            padding: 3rem 0 4rem;
        }
        .cta-card {
            background: linear-gradient(135deg, rgba(13, 24, 48, 0.9), rgba(7, 13, 28, 0.9));
            border: 1px solid var(--border-glass);
            border-radius: var(--radius-hero);
            padding: 3rem 2rem;
            position: relative;
            overflow: hidden;
            text-align: center;
            box-shadow: var(--shadow-card);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
        }
        .cta-card::before {
            content: "";
            position: absolute;
            width: 400px;
            height: 400px;
            background: radial-gradient(circle, rgba(0, 229, 255, 0.16), transparent 70%);
            top: -200px;
            right: -100px;
            pointer-events: none;
        }
        .cta-card::after {
            content: "";
            position: absolute;
            width: 300px;
            height: 300px;
            background: radial-gradient(circle, rgba(47, 128, 255, 0.12), transparent 70%);
            bottom: -150px;
            left: -80px;
            pointer-events: none;
        }
        .cta-card h2 {
            font-size: clamp(1.5rem, 3vw, 2.2rem);
            font-weight: 900;
            color: #fff;
            margin-bottom: 0.75rem;
        }
        .cta-card p {
            color: var(--text-secondary);
            max-width: 560px;
            margin: 0 auto 2rem;
            font-size: 0.95rem;
        }
        .cta-card .btn-primary {
            font-size: 1rem;
            padding: 0.75rem 2.5rem;
        }
        .site-footer {
            background: var(--bg-footer);
            border-top: 1px solid rgba(0, 229, 255, 0.08);
            padding: 3rem 0 0;
        }
        .footer-grid {
            display: grid;
            gap: 2.5rem;
            padding-bottom: 2.5rem;
        }
        @media (min-width: 640px) {
            .footer-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }
        @media (min-width: 1024px) {
            .footer-grid {
                grid-template-columns: 1.4fr 1fr 1fr 1.2fr;
            }
        }
        .footer-brand .logo-main {
            margin-bottom: 1rem;
        }
        .footer-brand p {
            color: var(--text-muted);
            font-size: 0.85rem;
            line-height: 1.7;
            max-width: 300px;
        }
        .footer-title {
            color: #fff;
            font-weight: 700;
            font-size: 0.95rem;
            margin-bottom: 1rem;
        }
        .footer-links {
            display: flex;
            flex-direction: column;
            gap: 0.5rem;
        }
        .footer-links a {
            color: var(--text-muted);
            font-size: 0.85rem;
            transition: var(--transition);
        }
        .footer-links a:hover {
            color: var(--accent);
            padding-left: 4px;
        }
        .footer-contact {
            display: flex;
            flex-direction: column;
            gap: 0.5rem;
            color: var(--text-muted);
            font-size: 0.85rem;
        }
        .footer-contact div {
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .footer-contact i {
            color: var(--accent);
            width: 16px;
            font-size: 0.8rem;
        }
        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.05);
            padding: 1.25rem 0;
            display: flex;
            flex-direction: column;
            align-items: center;
            gap: 0.4rem;
            text-align: center;
        }
        @media (min-width: 768px) {
            .footer-bottom {
                flex-direction: row;
                justify-content: space-between;
            }
        }
        .footer-bottom p {
            color: var(--text-muted);
            font-size: 0.78rem;
        }
        .back-to-top {
            width: 36px;
            height: 36px;
            border-radius: 50%;
            border: 1px solid rgba(0, 229, 255, 0.3);
            color: var(--accent);
            display: inline-flex;
            align-items: center;
            justify-content: center;
            transition: var(--transition);
        }
        .back-to-top:hover {
            background: rgba(0, 229, 255, 0.1);
            transform: translateY(-3px);
            box-shadow: 0 0 16px rgba(0, 229, 255, 0.2);
        }
        .back-to-top:focus-visible {
            outline: 2px solid var(--accent);
            outline-offset: 2px;
        }
        .page-hero {
            padding: 6.5rem 0 2.5rem;
        }
        .page-hero-bg {
            background: linear-gradient(180deg, rgba(7, 13, 28, 0.9), rgba(7, 13, 28, 0.7)), url('/assets/images/backpic/back-1.png') center/cover no-repeat;
            border-bottom: 1px solid rgba(0, 229, 255, 0.08);
        }
        .section-divider {
            height: 1px;
            background: linear-gradient(90deg, transparent, rgba(0, 229, 255, 0.35), transparent);
            border: none;
            margin: 0;
            opacity: 0.3;
        }
        ::selection {
            background: rgba(0, 229, 255, 0.25);
            color: #fff;
        }
        ::-webkit-scrollbar {
            width: 8px;
            height: 8px;
        }
        ::-webkit-scrollbar-track {
            background: #070D1C;
        }
        ::-webkit-scrollbar-thumb {
            background: rgba(0, 229, 255, 0.25);
            border-radius: 8px;
        }
        ::-webkit-scrollbar-thumb:hover {
            background: rgba(0, 229, 255, 0.4);
        }
        @media (max-width: 767px) {
            .header-inner {
                height: 64px;
            }
            .main-nav {
                display: none;
            }
            .mobile-menu {
                display: none;
            }
            .mobile-menu.open {
                display: block;
            }
        }
        @media (min-width: 768px) {
            .mobile-menu {
                display: none !important;
            }
            .btn-menu {
                display: none;
            }
            .btn-mobile-cta {
                display: none;
            }
        }
        @media (max-width: 430px) {
            .btn-mobile-cta {
                display: inline-flex;
                padding: 0.45rem 1rem;
                font-size: 0.8rem;
            }
            .header-inner .btn-primary {
                display: none;
            }
        }
        @media (max-width: 360px) {
            .logo-text {
                font-size: 1rem;
            }
            .logo-text small {
                font-size: 0.58rem;
            }
        }

/* roulang page: category1 */
:root {
      --primary: #00E5FF;
      --primary-dark: #2F80FF;
      --accent: #FFB020;
      --bg-deep: #070D1C;
      --bg-secondary: #0C1528;
      --bg-footer: #04070E;
      --text-main: #C7D1E4;
      --text-soft: #7D8BB0;
      --glass-bg: rgba(255, 255, 255, 0.04);
      --glass-border: rgba(0, 229, 255, 0.15);
      --radius-lg: 20px;
      --radius-xl: 32px;
    }

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

    html {
      scroll-behavior: smooth;
    }

    body {
      font-family: system-ui, -apple-system, "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
      background-color: var(--bg-deep);
      color: var(--text-main);
      line-height: 1.75;
      font-size: 1rem;
      overflow-x: hidden;
    }

    .container-custom {
      max-width: 1280px;
      margin-left: auto;
      margin-right: auto;
      padding-left: 1rem;
      padding-right: 1rem;
    }

    @media (min-width: 640px) {
      .container-custom {
        padding-left: 1.5rem;
        padding-right: 1.5rem;
      }
    }

    @media (min-width: 1024px) {
      .container-custom {
        padding-left: 2rem;
        padding-right: 2rem;
      }
    }

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

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

    button {
      background: none;
      border: none;
      font-family: inherit;
      cursor: pointer;
    }

    .main-header {
      position: sticky;
      top: 0;
      z-index: 1000;
      background: rgba(7, 13, 28, 0.85);
      backdrop-filter: blur(20px);
      -webkit-backdrop-filter: blur(20px);
      border-bottom: 1px solid rgba(0, 229, 255, 0.08);
      transition: box-shadow 0.3s;
    }

    .main-header.scrolled {
      box-shadow: 0 8px 32px rgba(0, 0, 0, 0.5);
    }

    .nav-wrap {
      display: flex;
      align-items: center;
      justify-content: space-between;
      height: 76px;
      gap: 1.5rem;
    }

    .logo-main {
      display: flex;
      align-items: center;
      gap: 0.75rem;
      flex-shrink: 0;
    }

    .logo-icon {
      width: 42px;
      height: 42px;
      border-radius: 12px;
      background: linear-gradient(135deg, #00E5FF, #2F80FF);
      display: flex;
      align-items: center;
      justify-content: center;
      color: #04101F;
      font-size: 1.2rem;
      box-shadow: 0 0 20px rgba(0, 229, 255, 0.35);
    }

    .logo-text {
      font-size: 1.05rem;
      font-weight: 900;
      color: #fff;
      line-height: 1.3;
      display: flex;
      flex-direction: column;
    }

    .logo-text small {
      font-size: 0.7rem;
      color: rgba(0, 229, 255, 0.8);
      font-weight: 500;
      letter-spacing: 0.08em;
    }

    .main-nav {
      display: flex;
      align-items: center;
      gap: 0.25rem;
    }

    .nav-link {
      padding: 8px 16px;
      border-radius: 9999px;
      font-size: 0.9rem;
      font-weight: 500;
      color: #A0AEC0;
      transition: all 0.3s ease-out;
      position: relative;
      white-space: nowrap;
    }

    .nav-link:hover {
      color: #fff;
      background: rgba(255, 255, 255, 0.04);
    }

    .nav-link.active {
      color: var(--primary);
      background: rgba(0, 229, 255, 0.1);
    }

    .nav-link.active::after {
      content: '';
      position: absolute;
      bottom: 2px;
      left: 50%;
      transform: translateX(-50%);
      width: 20px;
      height: 2px;
      background: var(--primary);
      border-radius: 4px;
    }

    .nav-actions {
      display: flex;
      align-items: center;
      gap: 0.75rem;
      flex-shrink: 0;
    }

    .nav-cta {
      background: linear-gradient(135deg, #00E5FF, #2F80FF);
      color: #04101F;
      font-weight: 700;
      font-size: 0.85rem;
      padding: 8px 22px;
      border-radius: 9999px;
      transition: all 0.3s ease-out;
      box-shadow: 0 0 20px rgba(0, 229, 255, 0.25);
      white-space: nowrap;
    }

    .nav-cta:hover {
      box-shadow: 0 0 32px rgba(0, 229, 255, 0.6);
      transform: translateY(-2px);
    }

    .mega-trigger {
      display: flex;
      align-items: center;
      gap: 6px;
      padding: 8px 16px;
      border-radius: 9999px;
      font-size: 0.85rem;
      font-weight: 500;
      color: #A0AEC0;
      border: 1px solid rgba(0, 229, 255, 0.15);
      transition: all 0.3s;
    }

    .mega-trigger i {
      transition: transform 0.3s;
    }

    .mega-trigger:hover,
    .mega-trigger.active-trigger {
      color: var(--primary);
      border-color: rgba(0, 229, 255, 0.4);
      box-shadow: 0 0 16px rgba(0, 229, 255, 0.15);
    }

    .mega-trigger:hover i,
    .mega-trigger.active-trigger i {
      transform: rotate(180deg);
    }

    .mega-panel {
      position: absolute;
      top: 100%;
      left: 0;
      right: 0;
      background: rgba(13, 24, 48, 0.92);
      backdrop-filter: blur(24px);
      -webkit-backdrop-filter: blur(24px);
      border-bottom: 1px solid rgba(0, 229, 255, 0.15);
      box-shadow: 0 24px 48px rgba(0, 0, 0, 0.5);
      opacity: 0;
      visibility: hidden;
      transform: translateY(-8px);
      transition: all 0.2s ease-out;
      z-index: 999;
    }

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

    .mega-grid {
      display: grid;
      grid-template-columns: 1fr 1fr 1fr;
      gap: 2.5rem;
      padding: 2rem 0;
    }

    .mega-title {
      font-size: 0.85rem;
      font-weight: 700;
      color: #fff;
      margin-bottom: 1rem;
      padding-bottom: 0.5rem;
      border-bottom: 1px solid rgba(0, 229, 255, 0.1);
    }

    .mega-hot-item {
      display: block;
      padding: 6px 0;
      color: var(--text-main);
      font-size: 0.85rem;
      transition: color 0.2s;
    }

    .mega-hot-item:hover {
      color: var(--primary);
    }

    .mega-news-item {
      display: flex;
      justify-content: space-between;
      align-items: center;
      padding: 10px 0;
      border-bottom: 1px solid rgba(255, 255, 255, 0.04);
    }

    .mega-news-item a {
      font-size: 0.85rem;
      color: var(--text-main);
      flex: 1;
    }

    .mega-news-item a:hover {
      color: var(--primary);
    }

    .mega-news-item .time-label {
      font-size: 0.7rem;
      color: var(--text-soft);
      margin-left: 8px;
      flex-shrink: 0;
    }

    .mega-entry-card {
      background: rgba(255, 255, 255, 0.05);
      border: 1px solid rgba(0, 229, 255, 0.1);
      border-radius: 14px;
      padding: 14px 16px;
      margin-bottom: 10px;
      display: flex;
      align-items: center;
      gap: 10px;
      transition: all 0.25s;
      color: var(--text-main);
    }

    .mega-entry-card i {
      width: 30px;
      height: 30px;
      border-radius: 8px;
      background: linear-gradient(135deg, rgba(0, 229, 255, 0.2), rgba(47, 128, 255, 0.2));
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 0.8rem;
      color: var(--primary);
      flex-shrink: 0;
    }

    .mega-entry-card:hover {
      border-color: rgba(0, 229, 255, 0.3);
      box-shadow: 0 0 16px rgba(0, 229, 255, 0.1);
      transform: translateX(4px);
    }

    .hamburger {
      display: none;
      width: 42px;
      height: 42px;
      border-radius: 12px;
      border: 1px solid rgba(255, 255, 255, 0.1);
      justify-content: center;
      align-items: center;
      color: #fff;
      font-size: 1.2rem;
      transition: all 0.2s;
    }

    .hamburger:hover {
      border-color: rgba(0, 229, 255, 0.4);
    }

    .mobile-drawer {
      display: none;
      background: rgba(13, 24, 48, 0.98);
      backdrop-filter: blur(24px);
      border-top: 1px solid rgba(0, 229, 255, 0.1);
    }

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

    .mobile-drawer .nav-link {
      display: block;
      padding: 12px 24px;
      font-size: 1rem;
      border-radius: 0;
      border-bottom: 1px solid rgba(255, 255, 255, 0.03);
    }

    .mobile-drawer .nav-link.active {
      color: var(--primary);
      background: transparent;
    }

    .mobile-drawer .nav-link.active::after {
      display: none;
    }

    .mobile-drawer-cta {
      display: block;
      margin: 16px 24px 24px;
      text-align: center;
      background: linear-gradient(135deg, #00E5FF, #2F80FF);
      color: #04101F;
      font-weight: 700;
      padding: 12px 16px;
      border-radius: 9999px;
      font-size: 0.95rem;
    }

    /* ====== Hero Section ====== */
    .category-hero {
      position: relative;
      padding: 80px 0 120px;
      background-image: url('/assets/images/backpic/back-1.png');
      background-size: cover;
      background-position: center;
      overflow: hidden;
    }

    .category-hero::before {
      content: '';
      position: absolute;
      inset: 0;
      background: linear-gradient(180deg, rgba(7, 13, 28, 0.92) 0%, rgba(7, 13, 28, 0.75) 50%, #070D1C 100%);
      z-index: 1;
    }

    .category-hero::after {
      content: '';
      position: absolute;
      inset: 0;
      background-image: radial-gradient(circle at 80% 20%, rgba(0, 229, 255, 0.08) 0%, transparent 60%);
      z-index: 1;
    }

    .category-hero .container-custom {
      position: relative;
      z-index: 2;
    }

    .category-hero-grid {
      display: grid;
      grid-template-columns: 1.2fr 0.8fr;
      gap: 3rem;
      align-items: center;
    }

    .category-badge {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      background: rgba(0, 229, 255, 0.1);
      border: 1px solid rgba(0, 229, 255, 0.25);
      border-radius: 9999px;
      padding: 6px 16px;
      font-size: 0.8rem;
      font-weight: 700;
      color: var(--primary);
      margin-bottom: 20px;
      letter-spacing: 0.04em;
    }

    .category-badge .pulse-dot {
      width: 6px;
      height: 6px;
      border-radius: 9999px;
      background: var(--primary);
      animation: pulse 1.5s infinite;
    }

    @keyframes pulse {
      0%, 100% { opacity: 1; box-shadow: 0 0 0 0 rgba(0, 229, 255, 0.5); }
      50% { opacity: 0.7; box-shadow: 0 0 0 6px rgba(0, 229, 255, 0); }
    }

    .category-hero h1 {
      font-size: clamp(2.2rem, 4.8vw, 3.6rem);
      font-weight: 900;
      color: #fff;
      line-height: 1.15;
      margin-bottom: 20px;
      letter-spacing: -0.02em;
    }

    .category-hero h1 .text-gradient {
      background: linear-gradient(120deg, #00E5FF 20%, #2F80FF 80%);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      background-clip: text;
    }

    .category-hero .hero-desc {
      font-size: 1.05rem;
      line-height: 1.85;
      color: var(--text-main);
      max-width: 480px;
      margin-bottom: 32px;
    }

    .hero-cta-group {
      display: flex;
      align-items: center;
      gap: 1rem;
      flex-wrap: wrap;
    }

    .btn-glow {
      display: inline-flex;
      align-items: center;
      gap: 10px;
      background: linear-gradient(135deg, #00E5FF, #2F80FF);
      color: #04101F !important;
      font-weight: 800;
      font-size: 0.95rem;
      padding: 14px 32px;
      border-radius: 9999px;
      transition: all 0.3s ease-out;
      box-shadow: 0 0 24px rgba(0, 229, 255, 0.35);
      position: relative;
      overflow: hidden;
    }

    .btn-glow::before {
      content: '';
      position: absolute;
      top: 0;
      left: -100%;
      width: 60%;
      height: 100%;
      background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.25), transparent);
      transition: left 0.5s ease-out;
    }

    .btn-glow:hover {
      box-shadow: 0 0 40px rgba(0, 229, 255, 0.6);
      transform: translateY(-2px);
    }

    .btn-glow:hover::before {
      left: 120%;
    }

    .btn-ghost {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      background: rgba(255, 255, 255, 0.05);
      border: 1px solid rgba(255, 255, 255, 0.15);
      color: #fff;
      font-weight: 500;
      font-size: 0.9rem;
      padding: 14px 30px;
      border-radius: 9999px;
      transition: all 0.3s;
    }

    .btn-ghost:hover {
      border-color: rgba(0, 229, 255, 0.5);
      color: var(--primary);
      box-shadow: 0 0 16px rgba(0, 229, 255, 0.15);
    }

    .hero-visual {
      position: relative;
      display: flex;
      justify-content: flex-end;
    }

    .phone-frame {
      width: 280px;
      height: 520px;
      border-radius: 32px;
      background: rgba(12, 21, 40, 0.9);
      border: 1px solid rgba(0, 229, 255, 0.25);
      box-shadow: 0 0 60px rgba(0, 229, 255, 0.1), 0 32px 64px rgba(0, 0, 0, 0.6), inset 0 1px 0 rgba(255, 255, 255, 0.08);
      padding: 16px;
      display: flex;
      flex-direction: column;
      transform: rotate(2deg);
      position: relative;
      z-index: 2;
    }

    .phone-frame::after {
      content: '';
      position: absolute;
      top: 12px;
      left: 50%;
      transform: translateX(-50%);
      width: 60px;
      height: 4px;
      border-radius: 4px;
      background: rgba(255, 255, 255, 0.15);
    }

    .phone-frame .video-thumb {
      flex: 1;
      border-radius: 20px;
      overflow: hidden;
      position: relative;
      margin-top: 6px;
    }

    .phone-frame .video-thumb img {
      width: 100%;
      height: 100%;
      object-fit: cover;
    }

    .phone-frame .video-thumb .overlay-gradient {
      position: absolute;
      inset: 0;
      background: linear-gradient(180deg, transparent 50%, rgba(4, 7, 14, 0.85) 100%);
    }

    .live-tag {
      position: absolute;
      top: 12px;
      left: 12px;
      display: inline-flex;
      align-items: center;
      gap: 6px;
      background: rgba(4, 7, 14, 0.8);
      backdrop-filter: blur(8px);
      border-radius: 9999px;
      padding: 4px 12px;
      font-size: 0.72rem;
      font-weight: 700;
      color: #fff;
      border: 1px solid rgba(255, 255, 255, 0.15);
    }

    .live-tag i {
      color: #FF4D4F;
      animation: blink 1s infinite;
    }

    @keyframes blink {
      0%, 100% { opacity: 1; }
      50% { opacity: 0.4; }
    }

    .phone-frame .video-thumb .video-info {
      position: absolute;
      bottom: 16px;
      left: 16px;
      right: 16px;
      z-index: 2;
    }

    .phone-frame .video-thumb .video-info .tag-card {
      font-size: 0.65rem;
      color: rgba(0, 229, 255, 0.8);
      text-transform: uppercase;
      letter-spacing: 0.08em;
      margin-bottom: 4px;
    }

    .phone-frame .video-thumb .video-info h4 {
      font-size: 0.85rem;
      color: #fff;
      font-weight: 700;
      line-height: 1.4;
    }

    .hero-shape {
      position: absolute;
      z-index: 1;
      border-radius: 50%;
      filter: blur(60px);
      opacity: 0.4;
    }

    .hero-shape-1 {
      width: 200px;
      height: 200px;
      background: rgba(0, 229, 255, 0.4);
      top: -60px;
      right: -40px;
      z-index: 1;
    }

    .hero-shape-2 {
      width: 120px;
      height: 120px;
      background: rgba(47, 128, 255, 0.5);
      bottom: -30px;
      right: 60px;
      z-index: 1;
    }

    .float-stat-pill {
      position: absolute;
      z-index: 3;
      background: rgba(13, 24, 48, 0.9);
      backdrop-filter: blur(12px);
      border: 1px solid rgba(0, 229, 255, 0.2);
      border-radius: 16px;
      padding: 12px 16px;
      display: flex;
      align-items: center;
      gap: 10px;
      box-shadow: 0 8px 24px rgba(0, 0, 0, 0.4);
    }

    .float-stat-1 {
      bottom: 40px;
      left: -20px;
      animation: floatY 4s ease-in-out infinite;
    }

    .float-stat-2 {
      top: 80px;
      left: -10px;
      animation: floatY 5s ease-in-out infinite 1s;
    }

    @keyframes floatY {
      0%, 100% { transform: translateY(0); }
      50% { transform: translateY(-10px); }
    }

    .float-stat-pill .stats-number {
      font-size: 1.3rem;
      font-weight: 800;
      color: var(--primary);
      line-height: 1;
    }

    .float-stat-pill .stats-label {
      font-size: 0.7rem;
      color: var(--text-soft);
    }

    .scroll-indicator {
      position: absolute;
      bottom: 24px;
      left: 50%;
      transform: translateX(-50%);
      z-index: 5;
      color: var(--text-soft);
      font-size: 0.75rem;
      display: flex;
      flex-direction: column;
      align-items: center;
      gap: 8px;
      animation: scrollDown 2s infinite;
    }

    @keyframes scrollDown {
      0%, 100% { transform: translate(-50%, 0); opacity: 0.7; }
      50% { transform: translate(-50%, 8px); opacity: 1; }
    }

    /* ====== Section titles ====== */
    .section-title-wrap {
      text-align: left;
      margin-bottom: 48px;
    }

    .section-title-wrap.center {
      text-align: center;
    }

    .section-label {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      font-size: 0.75rem;
      color: var(--primary);
      font-weight: 700;
      letter-spacing: 0.1em;
      text-transform: uppercase;
      margin-bottom: 12px;
    }

    .section-label::before {
      content: '';
      width: 20px;
      height: 1px;
      background: var(--primary);
    }

    .section-title-wrap.center .section-label::before {
      display: none;
    }

    .section-title {
      font-size: clamp(1.6rem, 3vw, 2.2rem);
      font-weight: 800;
      color: #fff;
      line-height: 1.3;
      margin-bottom: 14px;
    }

    .section-sub {
      font-size: 0.95rem;
      color: var(--text-soft);
      max-width: 640px;
    }

    .section-title-wrap.center .section-sub {
      margin-left: auto;
      margin-right: auto;
    }

    /* ====== Panel / glass ====== */
    .glass-panel {
      background: var(--glass-bg);
      backdrop-filter: blur(12px);
      -webkit-backdrop-filter: blur(12px);
      border: 1px solid var(--glass-border);
      border-radius: var(--radius-lg);
      box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.08), 0 8px 32px rgba(0, 0, 0, 0.4);
    }

    .section-spacing {
      padding: 80px 0;
    }

    @media (max-width: 768px) {
      .section-spacing {
        padding: 56px 0;
      }
    }

    /* ====== Feature Cards ====== */
    .feature-cards-grid {
      display: grid;
      grid-template-columns: repeat(12, 1fr);
      gap: 24px;
    }

    .feature-card-col {
      grid-column: span 6;
    }

    .feature-card-col.large {
      grid-column: span 6;
      transform: scale(1.03);
    }

    .feature-card-2 {
      grid-column: span 4;
      transform: translateY(24px);
    }

    .feature-card-3 {
      grid-column: span 5;
      transform: translateY(-8px);
    }

    .feature-card-4 {
      grid-column: span 3;
      transform: translateY(16px);
    }

    .feature-card-single {
      grid-column: span 2;
    }

    @media (max-width: 1024px) {
      .feature-card-col, .feature-card-col.large,
      .feature-card-2, .feature-card-3, .feature-card-4 {
        grid-column: span 6;
        transform: none;
      }
    }

    @media (max-width: 640px) {
      .feature-card-col, .feature-card-col.large,
      .feature-card-2, .feature-card-3, .feature-card-4 {
        grid-column: span 12;
        transform: none;
      }
    }

    .feature-card {
      background: rgba(255, 255, 255, 0.04);
      backdrop-filter: blur(12px);
      border: 1px solid rgba(0, 229, 255, 0.12);
      border-radius: 20px;
      padding: 28px 28px 24px;
      box-shadow: 0 8px 32px rgba(0, 0, 0, 0.4);
      transition: all 0.3s ease-out;
      height: 100%;
      position: relative;
      overflow: hidden;
    }

    .feature-card::after {
      content: '';
      position: absolute;
      top: 0;
      left: 0; 
      right: 0;
      height: 1px;
      background: linear-gradient(90deg, transparent, rgba(0, 229, 255, 0.4), transparent);
    }

    .feature-card:hover {
      transform: translateY(-4px) scale(1.01);
      border-color: rgba(0, 229, 255, 0.2);
      box-shadow: 0 0 32px rgba(0, 229, 255, 0.15), 0 8px 32px rgba(0, 0, 0, 0.5);
    }

    .feature-card .card-icon {
      width: 48px;
      height: 48px;
      border-radius: 14px;
      background: linear-gradient(135deg, rgba(0, 229, 255, 0.15), rgba(47, 128, 255, 0.15));
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 1.2rem;
      color: var(--primary);
      margin-bottom: 20px;
    }

    .feature-card h3 {
      font-size: 1.15rem;
      font-weight: 700;
      color: #fff;
      margin-bottom: 10px;
    }

    .feature-card p {
      font-size: 0.88rem;
      line-height: 1.7;
      color: var(--text-main);
    }

    .feature-card .feature-link {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      font-size: 0.8rem;
      color: var(--primary);
      margin-top: 16px;
      font-weight: 600;
      transition: gap 0.3s;
    }

    .feature-card .feature-link:hover {
      gap: 14px;
    }

    .feature-tag {
      position: absolute;
      top: 16px;
      right: 16px;
      font-size: 0.65rem;
      font-weight: 800;
      background: rgba(255, 176, 32, 0.15);
      color: var(--accent);
      border-radius: 9999px;
      padding: 4px 10px;
      border: 1px solid rgba(255, 176, 32, 0.25);
    }

    .feature-card.hot-card .card-icon {
      background: linear-gradient(135deg, rgba(0, 229, 255, 0.25), rgba(47, 128, 255, 0.25));
      box-shadow: 0 0 24px rgba(0, 229, 255, 0.2);
    }

    /* ====== CheckList Section ====== */
    .checklist-section {
      background: var(--bg-secondary);
      border-radius: 32px;
      padding: 64px 56px;
      position: relative;
      overflow: hidden;
    }

    .checklist-section::before {
      content: '';
      position: absolute;
      top: -120px;
      right: -120px;
      width: 300px;
      height: 300px;
      background: radial-gradient(circle, rgba(0, 229, 255, 0.08), transparent 70%);
    }

    .checklist-grid {
      display: grid;
      grid-template-columns: 0.8fr 1.2fr;
      gap: 4rem;
      align-items: start;
    }

    .checklist-list .list-item {
      display: flex;
      gap: 24px;
      padding: 20px 0;
      border-bottom: 1px solid rgba(255, 255, 255, 0.05);
      align-items: flex-start;
      transition: background 0.2s;
    }

    .checklist-list .list-item:hover {
      background: rgba(255, 255, 255, 0.02);
    }

    .checklist-list .list-item:last-child {
      border-bottom: none;
    }

    .list-number {
      font-size: 2rem;
      font-weight: 900;
      color: rgba(0, 229, 255, 0.15);
      line-height: 1;
      flex-shrink: 0;
      font-family: 'SF Mono', 'Menlo', monospace;
      transition: color 0.3s;
    }

    .list-item:hover .list-number {
      color: rgba(0, 229, 255, 0.4);
    }

    .list-content h3 {
      font-size: 1.1rem;
      font-weight: 700;
      color: #fff;
      margin-bottom: 6px;
    }

    .list-content p {
      font-size: 0.85rem;
      color: var(--text-soft);
      line-height: 1.75;
      margin-bottom: 8px;
    }

    .list-link {
      display: inline-flex;
      align-items: center;
      gap: 6px;
      font-size: 0.78rem;
      color: var(--primary);
      font-weight: 600;
      transition: gap 0.3s;
    }

    .list-link i {
      transition: transform 0.3s;
    }

    .list-link:hover {
      gap: 12px;
    }

    .checklist-info {
      margin-top: 16px;
    }

    .checklist-card {
      background: rgba(255, 255, 255, 0.05);
      border: 1px solid rgba(0, 229, 255, 0.15);
      border-radius: 20px;
      padding: 28px;
      margin-bottom: 20px;
    }

    .checklist-card h4 {
      font-size: 0.95rem;
      font-weight: 700;
      color: #fff;
      margin-bottom: 8px;
    }

    .checklist-card p {
      font-size: 0.82rem;
      color: var(--text-main);
      line-height: 1.7;
    }

    .checklist-card .card-icon {
      width: 36px;
      height: 36px;
      border-radius: 10px;
      background: rgba(0, 229, 255, 0.1);
      display: flex;
      align-items: center;
      justify-content: center;
      color: var(--primary);
      font-size: 0.8rem;
      margin-bottom: 14px;
    }

    /* ====== Scenario ====== */
    .scenario-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }

    .scenario-card {
      background: rgba(255, 255, 255, 0.03);
      border: 1px solid rgba(255, 255, 255, 0.06);
      border-radius: 20px;
      padding: 32px 28px;
      transition: all 0.3s ease-out;
    }

    .scenario-card:hover {
      border-color: rgba(0, 229, 255, 0.2);
      box-shadow: 0 0 32px rgba(0, 229, 255, 0.08);
      transform: translateY(-4px);
    }

    .scenario-card .scenario-icon {
      width: 44px;
      height: 44px;
      border-radius: 12px;
      background: linear-gradient(135deg, rgba(0, 229, 255, 0.12), rgba(47, 128, 255, 0.12));
      display: flex;
      align-items: center;
      justify-content: center;
      color: var(--primary);
      font-size: 1.1rem;
      margin-bottom: 18px;
    }

    .scenario-card h3 {
      font-size: 1.1rem;
      font-weight: 700;
      color: #fff;
      margin-bottom: 8px;
    }

    .scenario-card p {
      font-size: 0.85rem;
      color: var(--text-soft);
      line-height: 1.75;
    }

    /* ====== Steps ====== */
    .steps-wrap {
      position: relative;
    }

    .steps-wrap::before {
      content: '';
      position: absolute;
      top: 24px;
      bottom: 40px;
      left: 28px;
      width: 1px;
      background: linear-gradient(180deg, rgba(0, 229, 255, 0.4), rgba(0, 229, 255, 0.05));
    }

    .step-item {
      display: flex;
      gap: 24px;
      position: relative;
      z-index: 1;
      margin-bottom: 28px;
    }

    .step-number {
      width: 56px;
      height: 56px;
      border-radius: 16px;
      background: linear-gradient(135deg, rgba(0, 229, 255, 0.2), rgba(47, 128, 255, 0.2));
      border: 1px solid rgba(0, 229, 255, 0.25);
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 1.1rem;
      font-weight: 900;
      color: var(--primary);
      flex-shrink: 0;
      box-shadow: 0 4px 16px rgba(0, 0, 0, 0.3);
    }

    .step-content {
      padding-top: 4px;
    }

    .step-content h3 {
      font-size: 1.1rem;
      font-weight: 700;
      color: #fff;
      margin-bottom: 8px;
    }

    .step-content p {
      font-size: 0.85rem;
      color: var(--text-soft);
      line-height: 1.75;
      margin-bottom: 8px;
      max-width: 640px;
    }

    .step-content ul {
      list-style: none;
      padding: 0;
      margin: 0;
    }

    .step-content ul li {
      font-size: 0.82rem;
      color: var(--text-main);
      padding: 4px 0;
      padding-left: 16px;
      position: relative;
    }

    .step-content ul li::before {
      content: '';
      position: absolute;
      left: 0;
      top: 12px;
      width: 6px;
      height: 6px;
      border-radius: 9999px;
      background: var(--primary);
      opacity: 0.5;
    }

    /* ====== FAQ ====== */
    .faq-section {
      max-width: 860px;
      margin: 0 auto;
    }

    .faq-item {
      background: rgba(255, 255, 255, 0.03);
      border: 1px solid rgba(255, 255, 255, 0.06);
      border-radius: 16px;
      margin-bottom: 12px;
      overflow: hidden;
      transition: all 0.3s ease-out;
    }

    .faq-item:hover {
      border-color: rgba(0, 229, 255, 0.15);
    }

    .faq-item.active {
      border-color: rgba(0, 229, 255, 0.2);
      box-shadow: 0 0 20px rgba(0, 229, 255, 0.06);
    }

    .faq-question {
      display: flex;
      justify-content: space-between;
      align-items: center;
      gap: 16px;
      padding: 20px 24px;
      cursor: pointer;
      font-size: 0.95rem;
      font-weight: 600;
      color: #e8eef8;
      transition: color 0.2s;
    }

    .faq-question:hover {
      color: var(--primary);
    }

    .faq-question .faq-icon {
      width: 28px;
      height: 28px;
      border-radius: 8px;
      background: rgba(0, 229, 255, 0.1);
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 0.7rem;
      color: var(--primary);
      transition: transform 0.3s;
      flex-shrink: 0;
    }

    .faq-item.active .faq-icon {
      transform: rotate(45deg);
    }

    .faq-answer {
      padding: 0 24px;
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.3s ease-out, padding 0.3s;
      font-size: 0.88rem;
      color: var(--text-soft);
      line-height: 1.8;
    }

    .faq-item.active .faq-answer {
      max-height: 300px;
      padding: 0 24px 20px;
    }

    /* ====== CTA ====== */
    .cta-banner {
      background: rgba(12, 21, 40, 0.8);
      border: 1px solid rgba(0, 229, 255, 0.15);
      border-radius: 32px;
      padding: 64px 48px;
      text-align: center;
      position: relative;
      overflow: hidden;
    }

    .cta-banner::before {
      content: '';
      position: absolute;
      top: -80px;
      left: -80px;
      width: 300px;
      height: 300px;
      background: radial-gradient(circle, rgba(0, 229, 255, 0.12), transparent 70%);
    }

    .cta-banner::after {
      content: '';
      position: absolute;
      bottom: -80px;
      right: -80px;
      width: 300px;
      height: 300px;
      background: radial-gradient(circle, rgba(47, 128, 255, 0.12), transparent 70%);
    }

    .cta-title {
      font-size: clamp(1.6rem, 3vw, 2.3rem);
      font-weight: 800;
      color: #fff;
      margin-bottom: 14px;
      line-height: 1.4;
    }

    .cta-title .highlight {
      background: linear-gradient(135deg, #00E5FF, #2F80FF);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      background-clip: text;
    }

    .cta-sub {
      font-size: 0.95rem;
      color: var(--text-soft);
      max-width: 520px;
      margin: 0 auto 28px;
    }

    .cta-action-row {
      display: flex;
      gap: 1rem;
      justify-content: center;
      flex-wrap: wrap;
      align-items: center;
    }

    .cta-note {
      margin-top: 16px;
      font-size: 0.75rem;
      color: var(--text-soft);
      opacity: 0.8;
      display: flex;
      align-items: center;
      gap: 8px;
      justify-content: center;
      flex-wrap: wrap;
    }

    .cta-note i {
      color: var(--primary);
    }

    /* ====== Breadcrumb ====== */
    .breadcrumb {
      display: flex;
      align-items: center;
      gap: 8px;
      font-size: 0.8rem;
      color: var(--text-soft);
      margin-bottom: 24px;
      flex-wrap: wrap;
    }

    .breadcrumb a {
      transition: color 0.2s;
    }

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

    .breadcrumb i {
      font-size: 0.6rem;
      opacity: 0.6;
    }

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

    /* ====== Footer ====== */
    .site-footer {
      background: linear-gradient(180deg, #04070E, #04070E);
      border-top: 1px solid rgba(0, 229, 255, 0.08);
      padding: 64px 0 28px;
    }

    .footer-grid {
      display: grid;
      grid-template-columns: 1.8fr 1fr 1fr 1fr;
      gap: 3rem;
      padding-bottom: 48px;
      border-bottom: 1px solid rgba(255, 255, 255, 0.04);
      margin-bottom: 28px;
    }

    .footer-brand p {
      font-size: 0.82rem;
      color: var(--text-soft);
      line-height: 1.75;
      margin-top: 16px;
      max-width: 280px;
    }

    .footer-title {
      font-size: 0.9rem;
      font-weight: 700;
      color: #fff;
      margin-bottom: 20px;
      position: relative;
      padding-bottom: 8px;
    }

    .footer-title::after {
      content: '';
      position: absolute;
      bottom: 0;
      left: 0;
      width: 24px;
      height: 2px;
      background: linear-gradient(90deg, #00E5FF, transparent);
      border-radius: 4px;
    }

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

    .footer-links a {
      font-size: 0.82rem;
      color: var(--text-soft);
      transition: color 0.2s, padding-left 0.2s;
    }

    .footer-links a:hover {
      color: var(--primary);
      padding-left: 6px;
    }

    .footer-contact div {
      display: flex;
      align-items: center;
      gap: 10px;
      font-size: 0.82rem;
      color: var(--text-soft);
      margin-bottom: 14px;
    }

    .footer-contact i {
      color: var(--primary);
      width: 18px;
      text-align: center;
    }

    .footer-bottom {
      display: flex;
      justify-content: space-between;
      align-items: center;
      gap: 1rem;
      font-size: 0.75rem;
      color: rgba(125, 139, 176, 0.7);
      flex-wrap: wrap;
    }

    .back-to-top {
      width: 40px;
      height: 40px;
      border-radius: 12px;
      background: rgba(255, 255, 255, 0.05);
      border: 1px solid rgba(255, 255, 255, 0.08);
      color: var(--text-soft);
      display: flex;
      align-items: center;
      justify-content: center;
      transition: all 0.3s;
      cursor: pointer;
    }

    .back-to-top:hover {
      background: rgba(0, 229, 255, 0.1);
      border-color: rgba(0, 229, 255, 0.3);
      color: var(--primary);
      box-shadow: 0 0 16px rgba(0, 229, 255, 0.2);
    }

    @media (max-width: 1024px) {
      .main-nav {
        display: none;
      }

      .mega-trigger {
        display: none;
      }

      .hamburger {
        display: flex;
      }

      .mobile-drawer {
        display: none;
      }

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

      .category-hero-grid {
        grid-template-columns: 1fr;
        gap: 48px;
      }

      .hero-visual {
        justify-content: center;
      }

      .checklist-grid {
        grid-template-columns: 1fr;
        gap: 2rem;
      }

      .footer-grid {
        grid-template-columns: 1fr 1fr;
        gap: 2rem;
      }

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

    @media (max-width: 640px) {
      .nav-cta {
        display: none;
      }

      .footer-grid {
        grid-template-columns: 1fr;
        gap: 2rem;
      }

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

      .checklist-section {
        padding: 40px 24px;
        border-radius: 24px;
      }

      .cta-banner {
        padding: 48px 24px;
        border-radius: 24px;
      }

      .section-spacing {
        padding: 48px 0;
      }

      .feature-cards-grid {
        gap: 16px;
      }

      .hero-cta-group {
        flex-direction: column;
        align-items: stretch;
      }

      .btn-glow, .btn-ghost {
        justify-content: center;
      }

      .phone-frame {
        width: 240px;
        height: 440px;
      }

      .float-stat-1 {
        bottom: 20px;
        left: 10px;
      }

      .float-stat-2 {
        top: 40px;
        left: 6px;
      }
    }

    @media (max-width: 450px) {
      .footer-bottom {
        justify-content: center;
        text-align: center;
      }
    }

/* roulang page: category2 */
:root {
  --bg-primary: #070D1C;
  --bg-secondary: #0C1528;
  --bg-deep: #04070E;
  --color-primary: #00E5FF;
  --color-secondary: #2F80FF;
  --color-accent: #FFB020;
  --color-text: #C7D1E4;
  --color-white: #FFFFFF;
  --color-dim: #7D8BB0;
  --border-glass: rgba(0, 229, 255, 0.15);
  --card-bg: rgba(255, 255, 255, 0.04);
  --card-bg-strong: rgba(255, 255, 255, 0.07);
  --radius-lg: 20px;
  --radius-xl: 32px;
  --shadow-card: 0 8px 32px rgba(0, 0, 0, 0.4);
  --shadow-glow: 0 0 32px rgba(0, 229, 255, 0.15);
  --shadow-cta: 0 0 24px rgba(0, 229, 255, 0.35);
  --font-stack: system-ui, -apple-system, "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
}

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

html { scroll-behavior: smooth; }

body {
  font-family: var(--font-stack);
  background: var(--bg-primary);
  color: var(--color-text);
  line-height: 1.75;
  font-size: 1rem;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

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

.container-custom {
  max-width: 1280px;
  margin: 0 auto;
  padding-left: 1rem;
  padding-right: 1rem;
}
@media (min-width: 640px) {
  .container-custom { padding-left: 1.5rem; padding-right: 1.5rem; }
}
@media (min-width: 1024px) {
  .container-custom { padding-left: 2rem; padding-right: 2rem; }
}

.section-block { padding: 4rem 0; }
@media (min-width: 768px) { .section-block { padding: 6rem 0; } }

.section-head { text-align: center; max-width: 720px; margin: 0 auto 3rem; }
.section-tag {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  color: var(--color-primary);
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  padding: 0.3rem 1rem;
  border: 1px solid rgba(0, 229, 255, 0.25);
  border-radius: 999px;
  background: rgba(0, 229, 255, 0.06);
  margin-bottom: 1rem;
}
.section-head h2 {
  color: var(--color-white);
  font-size: clamp(1.75rem, 3vw, 2.5rem);
  font-weight: 900;
  line-height: 1.3;
  margin-bottom: 0.75rem;
}
.section-head p { color: var(--color-dim); font-size: 1rem; }

/* ===== Header / Nav ===== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(7, 13, 28, 0.88);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid rgba(0, 229, 255, 0.08);
}
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  height: 72px;
}
.logo-main {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  flex-shrink: 0;
}
.logo-icon {
  width: 42px;
  height: 42px;
  border-radius: 12px;
  background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
  display: flex;
  align-items: center;
  justify-content: center;
  color: #04101F;
  font-size: 1.1rem;
  box-shadow: 0 0 20px rgba(0, 229, 255, 0.3);
}
.logo-text {
  display: flex;
  flex-direction: column;
  color: var(--color-white);
  font-weight: 800;
  font-size: 1.05rem;
  line-height: 1.3;
  letter-spacing: 0.01em;
  white-space: nowrap;
}
.logo-text small {
  font-size: 0.72rem;
  font-weight: 500;
  color: var(--color-primary);
  letter-spacing: 0.08em;
}
.main-nav {
  display: flex;
  align-items: center;
  gap: 0.25rem;
}
.nav-link {
  position: relative;
  padding: 0.5rem 0.9rem;
  color: #A0AEC0;
  font-size: 0.95rem;
  font-weight: 500;
  border-radius: 8px;
  transition: color 0.3s ease, background 0.3s ease;
}
.nav-link::after {
  content: "";
  position: absolute;
  left: 0.9rem;
  right: 0.9rem;
  bottom: 0.1rem;
  height: 2px;
  border-radius: 2px;
  background: linear-gradient(90deg, var(--color-primary), var(--color-secondary));
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.3s ease;
}
.nav-link:hover, .nav-link.active { color: var(--color-white); }
.nav-link:hover::after, .nav-link.active::after { transform: scaleX(1); }

.header-actions { display: flex; align-items: center; gap: 0.75rem; }
.mega-trigger {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  color: #A0AEC0;
  font-size: 0.9rem;
  font-weight: 500;
  padding: 0.45rem 0.9rem;
  border-radius: 999px;
  border: 1px solid rgba(255, 255, 255, 0.1);
  transition: all 0.3s ease;
}
.mega-trigger i { transition: transform 0.3s ease; }
.mega-trigger:hover { color: var(--color-white); border-color: rgba(0, 229, 255, 0.3); }
.mega-trigger:hover i { transform: rotate(180deg); }

.btn-primary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.7rem 1.6rem;
  border-radius: 999px;
  background: linear-gradient(135deg, #00E5FF, #2F80FF);
  color: #04101F;
  font-weight: 700;
  font-size: 0.95rem;
  box-shadow: 0 0 24px rgba(0, 229, 255, 0.35);
  transition: all 0.3s ease;
  position: relative;
  overflow: hidden;
}
.btn-primary::before {
  content: "";
  position: absolute;
  top: 0;
  left: -100%;
  width: 60%;
  height: 100%;
  background: rgba(255, 255, 255, 0.25);
  transform: skewX(-20deg);
  transition: left 0.4s ease;
}
.btn-primary:hover { box-shadow: 0 0 38px rgba(0, 229, 255, 0.6); transform: translateY(-2px); }
.btn-primary:hover::before { left: 120%; }
.btn-primary:active { filter: brightness(0.92); transform: translateY(0); }
.btn-primary:focus-visible { outline: 2px solid var(--color-primary); outline-offset: 3px; }

.btn-ghost {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.7rem 1.6rem;
  border-radius: 999px;
  border: 1px solid rgba(255, 255, 255, 0.18);
  color: var(--color-white);
  font-weight: 600;
  font-size: 0.95rem;
  background: rgba(255, 255, 255, 0.04);
  backdrop-filter: blur(8px);
  transition: all 0.3s ease;
}
.btn-ghost:hover { border-color: var(--color-primary); color: var(--color-primary); box-shadow: 0 0 20px rgba(0, 229, 255, 0.1); }
.btn-ghost:active { transform: translateY(0); }
.btn-ghost:focus-visible { outline: 2px solid var(--color-primary); outline-offset: 3px; }

.menu-toggle { display: none; width: 42px; height: 42px; border-radius: 10px; border: 1px solid rgba(255, 255, 255, 0.12); color: var(--color-white); align-items: center; justify-content: center; font-size: 1.1rem; }

/* Mega panel */
.mega-panel {
  position: absolute;
  top: calc(100% + 8px);
  left: 50%;
  transform: translateX(-50%) translateY(8px);
  width: min(760px, calc(100vw - 2rem));
  background: rgba(13, 24, 48, 0.92);
  backdrop-filter: blur(20px);
  border: 1px solid rgba(0, 229, 255, 0.15);
  border-radius: 20px;
  padding: 1.75rem;
  box-shadow: 0 24px 64px rgba(0, 0, 0, 0.5), 0 0 40px rgba(0, 229, 255, 0.06);
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.25s ease, transform 0.25s ease, visibility 0.25s;
  z-index: 99;
}
.mega-panel.open { opacity: 1; visibility: visible; transform: translateX(-50%) translateY(0); }
.mega-inner { display: grid; grid-template-columns: 1fr 1.4fr 1fr; gap: 1.5rem; }
.mega-col h4 {
  font-size: 0.78rem;
  color: var(--color-primary);
  font-weight: 700;
  letter-spacing: 0.1em;
  margin-bottom: 1rem;
}
.mega-col a { display: flex; align-items: center; gap: 0.5rem; padding: 0.45rem 0; color: var(--color-text); font-size: 0.9rem; transition: color 0.2s, transform 0.2s; }
.mega-col a:hover { color: var(--color-primary); transform: translateX(3px); }
.mega-col .mega-time { margin-left: auto; font-size: 0.75rem; color: var(--color-dim); }
.mega-entry {
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: 12px;
  padding: 0.6rem 0.9rem !important;
  margin-bottom: 0.5rem;
  background: rgba(255, 255, 255, 0.03);
  transition: all 0.3s ease !important;
}
.mega-entry:hover { border-color: var(--color-primary); background: rgba(0, 229, 255, 0.05); }

/* ===== Category Hero ===== */
.category-hero {
  position: relative;
  background-size: cover;
  background-position: center;
  padding: 5.5rem 0 5rem;
  overflow: hidden;
}
.category-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(7, 13, 28, 0.82) 0%, rgba(7, 13, 28, 0.68) 50%, rgba(7, 13, 28, 0.92) 100%);
  z-index: 1;
}
.category-hero::after {
  content: "";
  position: absolute;
  inset: 0;
  background-image: radial-gradient(circle at 20% 50%, rgba(0, 229, 255, 0.08) 0%, transparent 60%), radial-gradient(circle at 80% 30%, rgba(47, 128, 255, 0.08) 0%, transparent 40%);
  z-index: 1;
}
.hero-content { position: relative; z-index: 2; text-align: center; max-width: 780px; margin: 0 auto; }
.hero-tag {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  color: var(--color-primary);
  font-size: 0.82rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  padding: 0.4rem 1.2rem;
  border: 1px solid rgba(0, 229, 255, 0.3);
  border-radius: 999px;
  background: rgba(0, 229, 255, 0.08);
  margin-bottom: 1.4rem;
}
.hero-content h1 {
  color: var(--color-white);
  font-size: clamp(2rem, 4.5vw, 3.2rem);
  font-weight: 900;
  line-height: 1.25;
  margin-bottom: 1.2rem;
  text-shadow: 0 4px 30px rgba(0, 0, 0, 0.4);
}
.hero-content h1 span { color: var(--color-primary); }
.hero-content .hero-sub {
  color: var(--color-text);
  font-size: 1.06rem;
  line-height: 1.8;
  max-width: 560px;
  margin: 0 auto 2rem;
}
.hero-actions { display: flex; justify-content: center; gap: 1rem; flex-wrap: wrap; margin-bottom: 2.5rem; }
.hero-stats {
  display: flex;
  justify-content: center;
  gap: 2.5rem;
  flex-wrap: wrap;
  padding-top: 1.5rem;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
}
.hero-stats div { text-align: center; }
.hero-stats strong { display: block; color: var(--color-white); font-size: 1.4rem; font-weight: 800; }
.hero-stats span { color: var(--color-dim); font-size: 0.82rem; }

/* ===== Feature Grid (错位卡片) ===== */
.feature-grid {
  display: grid;
  grid-template-columns: repeat(12, 1fr);
  gap: 1.5rem;
}
.feature-card {
  position: relative;
  border-radius: var(--radius-lg);
  background: var(--card-bg);
  border: 1px solid rgba(255, 255, 255, 0.08);
  box-shadow: var(--shadow-card);
  overflow: hidden;
  transition: transform 0.3s ease, box-shadow 0.3s ease, border-color 0.3s ease;
  backdrop-filter: blur(12px);
}
.feature-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
}
.feature-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 12px 40px rgba(0, 0, 0, 0.5), 0 0 32px rgba(0, 229, 255, 0.15);
  border-color: rgba(0, 229, 255, 0.25);
}
.feature-card--large { grid-column: span 7; }
.feature-card:nth-child(2) { grid-column: span 5; }
.feature-card:nth-child(3) { grid-column: span 5; }
.feature-card:nth-child(4) { grid-column: span 7; }

.feature-media { position: relative; aspect-ratio: 16 / 9; overflow: hidden; }
.feature-media img { width: 100%; height: 100%; object-fit: cover; transition: transform 0.5s ease; }
.feature-card:hover .feature-media img { transform: scale(1.04); }
.feature-media::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, transparent 40%, rgba(7, 13, 28, 0.7) 100%);
}
.feature-badge {
  position: absolute;
  top: 1rem;
  right: 1rem;
  z-index: 2;
  background: linear-gradient(135deg, var(--color-accent), #FF8C42);
  color: #1A1205;
  font-size: 0.72rem;
  font-weight: 800;
  padding: 0.25rem 0.8rem;
  border-radius: 999px;
  box-shadow: 0 4px 14px rgba(255, 176, 32, 0.35);
}
.feature-body { padding: 1.5rem 1.5rem 1.8rem; }
.feature-icon {
  width: 46px;
  height: 46px;
  border-radius: 14px;
  background: linear-gradient(135deg, rgba(0, 229, 255, 0.15), rgba(47, 128, 255, 0.15));
  border: 1px solid rgba(0, 229, 255, 0.25);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-primary);
  font-size: 1.1rem;
  margin-bottom: 1rem;
}
.feature-body h3 { color: var(--color-white); font-size: 1.2rem; font-weight: 700; margin-bottom: 0.5rem; }
.feature-body p { color: var(--color-text); font-size: 0.92rem; line-height: 1.75; }
.feature-tags { display: flex; flex-wrap: wrap; gap: 0.5rem; margin-top: 1rem; }
.tag {
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--color-primary);
  padding: 0.2rem 0.7rem;
  border-radius: 999px;
  background: rgba(0, 229, 255, 0.08);
  border: 1px solid rgba(0, 229, 255, 0.15);
}

/* ===== Process ===== */
.section-alt { background: var(--bg-secondary); position: relative; }
.section-alt::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image: linear-gradient(rgba(0, 229, 255, 0.02) 1px, transparent 1px), linear-gradient(90deg, rgba(0, 229, 255, 0.02) 1px, transparent 1px);
  background-size: 32px 32px;
  pointer-events: none;
}
.process-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1.5rem;
  position: relative;
  z-index: 1;
}
.process-grid::before {
  content: "";
  position: absolute;
  top: 50px;
  left: 8%;
  right: 8%;
  height: 2px;
  background: linear-gradient(90deg, var(--color-primary), var(--color-secondary), var(--color-primary));
  opacity: 0.2;
  border-radius: 2px;
}
.process-step {
  position: relative;
  text-align: center;
  padding: 1.5rem 1rem;
  border-radius: var(--radius-lg);
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid rgba(255, 255, 255, 0.06);
  transition: all 0.3s ease;
}
.process-step:hover { border-color: rgba(0, 229, 255, 0.25); box-shadow: 0 0 24px rgba(0, 229, 255, 0.08); transform: translateY(-4px); }
.step-num {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 48px;
  height: 48px;
  margin: 0 auto 1rem;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
  color: #04101F;
  font-weight: 900;
  font-size: 0.95rem;
  box-shadow: 0 0 20px rgba(0, 229, 255, 0.3);
}
.process-step h3 { color: var(--color-white); font-size: 1.05rem; font-weight: 700; margin-bottom: 0.5rem; }
.process-step p { color: var(--color-dim); font-size: 0.85rem; line-height: 1.65; }

/* ===== Checklist ===== */
.checklist-wrap {
  border-radius: var(--radius-xl);
  background: linear-gradient(135deg, rgba(255, 255, 255, 0.04), rgba(255, 255, 255, 0.02));
  border: 1px solid rgba(255, 255, 255, 0.07);
  padding: 2.5rem;
  box-shadow: var(--shadow-card);
  backdrop-filter: blur(12px);
}
.checklist { max-width: 820px; margin: 0 auto; }
.checklist-item {
  display: flex;
  align-items: center;
  gap: 1.2rem;
  padding: 1.2rem 0.8rem;
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
  transition: background 0.3s, transform 0.3s;
  border-radius: 14px;
}
.checklist-item:last-child { border-bottom: none; }
.checklist-item:hover { background: rgba(0, 229, 255, 0.04); transform: translateX(6px); }
.check-num {
  font-size: 1.6rem;
  font-weight: 900;
  color: transparent;
  -webkit-text-stroke: 1.5px var(--color-primary);
  min-width: 52px;
  font-style: normal;
}
.check-info { flex: 1; }
.check-info h3 { color: var(--color-white); font-size: 1.05rem; font-weight: 700; margin-bottom: 0.2rem; }
.check-info p { color: var(--color-dim); font-size: 0.88rem; }
.check-arrow { color: var(--color-dim); font-size: 1rem; transition: all 0.3s; }
.checklist-item:hover .check-arrow { color: var(--color-primary); transform: translateX(4px); }

/* ===== Scenario Cards ===== */
.scenario-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
}
.scenario-card {
  border-radius: var(--radius-lg);
  background: var(--card-bg);
  border: 1px solid rgba(255, 255, 255, 0.07);
  box-shadow: var(--shadow-card);
  overflow: hidden;
  transition: all 0.3s ease;
  backdrop-filter: blur(12px);
}
.scenario-card:hover { transform: translateY(-4px); box-shadow: 0 12px 40px rgba(0, 0, 0, 0.5), 0 0 32px rgba(0, 229, 255, 0.12); border-color: rgba(0, 229, 255, 0.2); }
.scenario-media { position: relative; aspect-ratio: 4 / 3; overflow: hidden; }
.scenario-media img { width: 100%; height: 100%; object-fit: cover; transition: transform 0.5s ease; }
.scenario-card:hover .scenario-media img { transform: scale(1.05); }
.scenario-media::after { content: ""; position: absolute; inset: 0; background: linear-gradient(180deg, transparent 50%, rgba(7, 13, 28, 0.65) 100%); }
.scenario-body { padding: 1.4rem 1.4rem 1.6rem; }
.scenario-body h3 { color: var(--color-white); font-size: 1.05rem; font-weight: 700; margin-bottom: 0.5rem; }
.scenario-body p { color: var(--color-text); font-size: 0.88rem; line-height: 1.7; }

/* ===== FAQ ===== */
.faq-list { max-width: 780px; margin: 0 auto; display: flex; flex-direction: column; gap: 1rem; }
.faq-item {
  border-radius: var(--radius-lg);
  background: var(--card-bg);
  border: 1px solid rgba(255, 255, 255, 0.07);
  overflow: hidden;
  transition: border-color 0.3s, box-shadow 0.3s;
}
.faq-item:hover { border-color: rgba(0, 229, 255, 0.2); }
.faq-item.open { border-color: rgba(0, 229, 255, 0.3); box-shadow: 0 0 28px rgba(0, 229, 255, 0.07); }
.faq-question {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 1.2rem 1.4rem;
  color: var(--color-white);
  font-size: 1rem;
  font-weight: 600;
  text-align: left;
  transition: color 0.3s;
}
.faq-question:hover { color: var(--color-primary); }
.faq-question i {
  width: 30px;
  height: 30px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  border: 1px solid rgba(255, 255, 255, 0.15);
  color: var(--color-dim);
  transition: transform 0.4s ease, color 0.3s, border-color 0.3s;
  flex-shrink: 0;
}
.faq-item.open .faq-question i { transform: rotate(45deg); color: var(--color-primary); border-color: var(--color-primary); }
.faq-answer { max-height: 0; overflow: hidden; transition: max-height 0.45s ease; }
.faq-answer p { padding: 0 1.4rem 1.3rem; color: var(--color-dim); font-size: 0.92rem; line-height: 1.8; }

/* ===== CTA ===== */
.cta-card {
  position: relative;
  border-radius: var(--radius-xl);
  background: linear-gradient(135deg, rgba(0, 229, 255, 0.08), rgba(47, 128, 255, 0.08)), var(--bg-secondary);
  border: 1px solid rgba(0, 229, 255, 0.2);
  padding: 3.5rem 2rem;
  text-align: center;
  box-shadow: 0 16px 60px rgba(0, 0, 0, 0.5), inset 0 1px 0 rgba(255, 255, 255, 0.08);
  overflow: hidden;
}
.cta-card::before {
  content: "";
  position: absolute;
  top: -40%;
  left: 50%;
  transform: translateX(-50%);
  width: 500px;
  height: 500px;
  background: radial-gradient(circle, rgba(0, 229, 255, 0.12) 0%, transparent 60%);
  pointer-events: none;
}
.cta-card h2 { color: var(--color-white); font-size: clamp(1.5rem, 3vw, 2.2rem); font-weight: 900; margin-bottom: 0.8rem; position: relative; }
.cta-card p { color: var(--color-text); font-size: 1rem; margin-bottom: 2rem; position: relative; }

/* ===== Footer ===== */
.site-footer {
  background: linear-gradient(180deg, var(--bg-secondary) 0%, var(--bg-deep) 100%);
  border-top: 1px solid rgba(0, 229, 255, 0.08);
  padding-top: 4rem;
  position: relative;
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr 1.2fr;
  gap: 2.5rem;
  padding-bottom: 2.5rem;
}
.footer-brand p { color: var(--color-dim); font-size: 0.9rem; margin-top: 1rem; line-height: 1.75; }
.footer-title { color: var(--color-white); font-size: 0.95rem; font-weight: 700; margin-bottom: 1rem; }
.footer-links { display: flex; flex-direction: column; gap: 0.55rem; }
.footer-links a { color: var(--color-dim); font-size: 0.9rem; transition: color 0.2s, transform 0.2s; }
.footer-links a:hover { color: var(--color-primary); transform: translateX(3px); }
.footer-contact { display: flex; flex-direction: column; gap: 0.6rem; }
.footer-contact div { display: flex; align-items: center; gap: 0.6rem; color: var(--color-dim); font-size: 0.9rem; }
.footer-contact i { color: var(--color-primary); width: 18px; text-align: center; }
.footer-bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 0.8rem;
  border-top: 1px solid rgba(255, 255, 255, 0.06);
  padding: 1.5rem 0;
}
.footer-bottom p { color: var(--color-dim); font-size: 0.82rem; }
.back-to-top {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  border: 1px solid rgba(0, 229, 255, 0.3);
  background: rgba(0, 229, 255, 0.08);
  color: var(--color-primary);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 0.9rem;
  transition: all 0.3s ease;
  opacity: 0;
  visibility: hidden;
  transform: translateY(10px);
}
.back-to-top.visible { opacity: 1; visibility: visible; transform: translateY(0); }
.back-to-top:hover { background: var(--color-primary); color: #04101F; box-shadow: 0 0 20px rgba(0, 229, 255, 0.4); }

/* ===== Responsive ===== */
@media (max-width: 1024px) {
  .main-nav { gap: 0; }
  .nav-link { padding: 0.5rem 0.6rem; font-size: 0.88rem; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 768px) {
  .header-inner { height: 64px; }
  .main-nav {
    position: fixed;
    top: 64px;
    left: 0;
    right: 0;
    background: rgba(7, 13, 28, 0.97);
    backdrop-filter: blur(20px);
    flex-direction: column;
    align-items: flex-start;
    padding: 1rem 1.5rem;
    border-bottom: 1px solid rgba(0, 229, 255, 0.1);
    transform: translateY(-120%);
    transition: transform 0.35s ease;
    gap: 0.5rem;
    z-index: 98;
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.5);
  }
  .main-nav.open { transform: translateY(0); }
  .nav-link { width: 100%; padding: 0.8rem 0.6rem; font-size: 1rem; border-radius: 10px; }
  .nav-link::after { display: none; }
  .nav-link:hover, .nav-link.active { background: rgba(0, 229, 255, 0.06); color: var(--color-primary); }
  .menu-toggle { display: inline-flex; }
  .mega-trigger { display: none; }
  .mega-panel { display: none; }
  .mega-panel.open { display: block; }
  .mega-inner { grid-template-columns: 1fr; gap: 1.2rem; }
  .feature-grid { grid-template-columns: 1fr; }
  .feature-card--large, .feature-card:nth-child(2), .feature-card:nth-child(3), .feature-card:nth-child(4) { grid-column: span 1; }
  .process-grid { grid-template-columns: 1fr 1fr; }
  .process-grid::before { display: none; }
  .scenario-grid { grid-template-columns: 1fr; }
  .checklist-wrap { padding: 1.5rem; }
  .checklist-item { flex-wrap: wrap; }
  .check-num { font-size: 1.3rem; min-width: 40px; }
  .footer-grid { grid-template-columns: 1fr; gap: 2rem; }
  .hero-actions { flex-direction: column; align-items: center; }
  .btn-primary, .btn-ghost { width: 100%; max-width: 280px; }
}

@media (max-width: 520px) {
  .logo-text { font-size: 0.95rem; }
  .logo-text small { font-size: 0.65rem; }
  .process-grid { grid-template-columns: 1fr; }
  .hero-stats { gap: 1.5rem; }
  .hero-content h1 { font-size: 1.7rem; }
  .section-head h2 { font-size: 1.5rem; }
  .footer-bottom { flex-direction: column; text-align: center; justify-content: center; }
}

/* ===== Decorative elements ===== */
.signal-line {
  position: absolute;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--color-primary), transparent);
  opacity: 0.3;
  pointer-events: none;
}
.rate-dot {
  display: inline-block;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--color-primary);
  box-shadow: 0 0 8px var(--color-primary);
  margin-right: 0.4rem;
  animation: pulse-dot 2s infinite;
}
@keyframes pulse-dot {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.5; transform: scale(1.4); }
}
.fade-up { animation: fadeUp 0.8s ease both; }
@keyframes fadeUp {
  from { opacity: 0; transform: translateY(24px); }
  to { opacity: 1; transform: translateY(0); }
}