/* roulang page: index */
:root {
    --primary-500: #00D5FF;
    --primary-400: #38E8FF;
    --primary-600: #009FCC;
    --secondary-500: #7B61FF;
    --secondary-400: #9D86FF;
    --bg-950: #050D18;
    --bg-900: #091428;
    --bg-800: #0E1F3D;
    --bg-700: #15294F;
    --text-100: #F2F7FF;
    --text-300: #A9B9D4;
    --text-500: #64748B;
    --radius-lg: 24px;
    --radius-md: 14px;
    --radius-sm: 8px;
    --card-shadow: 0 8px 32px rgba(0,0,0,0.25);
    --glow-primary: 0 0 24px rgba(0,213,255,0.35), 0 4px 12px rgba(0,0,0,0.3);
    --glow-primary-hover: 0 0 40px rgba(0,213,255,0.55), 0 8px 20px rgba(0,0,0,0.35);
  }

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

  html {
    scroll-behavior: smooth;
  }

  body {
    background-color: var(--bg-900);
    background-image:
      radial-gradient(1200px 600px at 80% -10%, rgba(123,97,255,0.15), transparent 60%),
      radial-gradient(800px 400px at 10% 10%, rgba(0,213,255,0.12), transparent 60%);
    background-attachment: fixed;
    color: var(--text-100);
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
    line-height: 1.7;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    overflow-x: hidden;
  }

  a {
    color: inherit;
    text-decoration: none;
    transition: color 0.2s ease;
  }

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

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

  .container {
    max-width: 1280px;
    margin-inline: auto;
    padding-inline: 24px;
  }

  .section {
    padding-block: clamp(64px, 8vw, 96px);
    position: relative;
  }

  .overline {
    display: inline-flex;
    align-items: center;
    gap: 12px;
    font-size: 12px;
    font-weight: 700;
    letter-spacing: 0.2em;
    color: var(--primary-400);
    text-transform: uppercase;
    margin-bottom: 16px;
  }

  .overline::before {
    content: '';
    width: 16px;
    height: 2px;
    background: linear-gradient(135deg, var(--primary-500), var(--secondary-500));
    border-radius: 2px;
    display: inline-block;
  }

  .section-title {
    font-size: clamp(24px, 3vw, 32px);
    font-weight: 700;
    line-height: 1.3;
    color: var(--text-100);
  }

  .section-head {
    display: flex;
    justify-content: space-between;
    align-items: flex-end;
    gap: 16px;
    flex-wrap: wrap;
    margin-bottom: 40px;
  }

  .section-more {
    color: var(--text-300);
    font-size: 14px;
    font-weight: 500;
    transition: color 0.3s ease;
    white-space: nowrap;
  }

  .section-more:hover {
    color: var(--primary-400);
  }

  .glass-card {
    background: linear-gradient(145deg, rgba(255,255,255,0.08) 0%, rgba(255,255,255,0.02) 100%);
    backdrop-filter: blur(14px);
    -webkit-backdrop-filter: blur(14px);
    border: 1px solid rgba(255,255,255,0.08);
    border-radius: var(--radius-lg);
    box-shadow: var(--card-shadow);
  }

  /* ===== Header / Nav ===== */
  .navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 100;
    background: rgba(5,13,24,0.75);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border-bottom: 1px solid rgba(255,255,255,0.06);
    transition: box-shadow 0.3s ease;
  }

  .navbar.scrolled {
    box-shadow: 0 8px 32px rgba(0,0,0,0.35);
  }

  .nav-container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 72px;
    position: relative;
  }

  .nav-left,
  .nav-right {
    display: flex;
    align-items: center;
    gap: 6px;
  }

  .nav-left {
    flex: 1;
  }

  .nav-right {
    flex: 1;
    justify-content: flex-end;
  }

  .logo {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    font-size: 22px;
    font-weight: 800;
    color: #fff;
    line-height: 1;
    white-space: nowrap;
    position: relative;
    z-index: 102;
  }

  .logo-dot {
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: var(--primary-500);
    box-shadow: 0 0 10px var(--primary-500);
    display: inline-block;
  }

  .nav-link {
    display: inline-block;
    padding: 8px 14px;
    font-size: 15px;
    font-weight: 500;
    color: var(--text-300);
    border-radius: var(--radius-sm);
    position: relative;
    transition: color 0.25s ease;
  }

  .nav-link::after {
    content: '';
    position: absolute;
    left: 14px;
    right: 14px;
    bottom: 4px;
    height: 2px;
    border-radius: 2px;
    background: linear-gradient(135deg, var(--primary-500), var(--secondary-500));
    transform: scaleX(0);
    transform-origin: left;
    transition: transform 0.3s ease;
  }

  .nav-link:hover {
    color: var(--primary-400);
  }

  .nav-link:hover::after,
  .nav-link.active::after {
    transform: scaleX(1);
  }

  .nav-link.active {
    color: var(--primary-400);
  }

  .btn-login {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 9px 22px;
    font-size: 14px;
    font-weight: 600;
    color: #fff;
    background: linear-gradient(135deg, var(--primary-500), var(--secondary-500));
    border-radius: 40px;
    box-shadow: var(--glow-primary);
    transition: all 0.3s ease;
    white-space: nowrap;
    margin-left: 8px;
  }

  .btn-login:hover {
    box-shadow: var(--glow-primary-hover);
    transform: translateY(-2px);
  }

  .btn-login:active {
    transform: translateY(0);
    box-shadow: 0 0 16px rgba(0,213,255,0.3);
  }

  .btn-login:focus-visible,
  .nav-link:focus-visible,
  .btn-primary:focus-visible,
  .btn-outline:focus-visible {
    outline: 2px solid rgba(56,232,255,0.6);
    outline-offset: 2px;
  }

  .hamburger {
    display: none;
    flex-direction: column;
    justify-content: center;
    gap: 5px;
    width: 40px;
    height: 40px;
    border-radius: var(--radius-sm);
    padding: 8px;
    z-index: 102;
  }

  .hamburger span {
    display: block;
    width: 22px;
    height: 2px;
    border-radius: 2px;
    background: var(--primary-500);
    box-shadow: 0 0 6px rgba(0,213,255,0.5);
    transition: all 0.3s ease;
  }

  .hamburger.active span:nth-child(1) {
    transform: translateY(7px) rotate(45deg);
  }

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

  .hamburger.active span:nth-child(3) {
    transform: translateY(-7px) rotate(-45deg);
  }

  /* Mobile drawer */
  .drawer {
    position: fixed;
    inset: 0;
    z-index: 99;
    background: rgba(5,13,24,0.97);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 8px;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.4s ease, visibility 0.4s ease;
  }

  .drawer.open {
    opacity: 1;
    visibility: visible;
  }

  .drawer a {
    font-size: 24px;
    font-weight: 600;
    color: var(--text-100);
    padding: 14px 28px;
    display: flex;
    align-items: center;
    gap: 12px;
    transition: color 0.3s ease, transform 0.3s ease;
  }

  .drawer a:hover {
    color: var(--primary-400);
    transform: translateX(6px);
  }

  .drawer a .arrow-icon {
    font-size: 16px;
    color: var(--primary-500);
    opacity: 0;
    transform: translateX(-6px);
    transition: all 0.3s ease;
  }

  .drawer a:hover .arrow-icon {
    opacity: 1;
    transform: translateX(0);
  }

  .drawer .btn-login {
    margin-top: 20px;
    font-size: 18px;
    padding: 12px 48px;
  }

  .drawer .drawer-logo {
    position: absolute;
    top: 20px;
    font-size: 20px;
  }

  /* ===== Hero ===== */
  .hero {
    position: relative;
    min-height: 100svh;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    background-image: linear-gradient(180deg, rgba(5,13,24,0.6) 0%, rgba(5,13,24,0.9) 100%), url('/assets/images/backpic/back-1.webp');
    background-size: cover;
    background-position: center;
    overflow: hidden;
    padding: 120px 24px 80px;
  }

  .hero-grid::after {
    content: '';
    position: absolute;
    inset: 0;
    background-image: linear-gradient(rgba(255,255,255,0.03) 1px, transparent 1px),
      linear-gradient(90deg, rgba(255,255,255,0.03) 1px, transparent 1px);
    background-size: 48px 48px;
    pointer-events: none;
    z-index: 0;
  }

  .hero-content {
    position: relative;
    z-index: 2;
    max-width: 860px;
    margin-inline: auto;
  }

  .hero-eyebrow {
    display: inline-block;
    font-size: 12px;
    font-weight: 700;
    letter-spacing: 0.3em;
    color: var(--primary-400);
    text-transform: uppercase;
    margin-bottom: 24px;
    padding: 8px 20px;
    border: 1px solid rgba(0,213,255,0.25);
    border-radius: 40px;
    background: rgba(0,213,255,0.06);
    backdrop-filter: blur(8px);
  }

  .hero h1 {
    font-size: clamp(40px, 6vw, 64px);
    font-weight: 800;
    line-height: 1.2;
    color: var(--text-100);
    letter-spacing: -0.01em;
    margin-bottom: 20px;
  }

  .hero h1 .gradient-text {
    background: linear-gradient(135deg, var(--primary-400) 0%, var(--primary-500) 40%, var(--secondary-500) 100%);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    color: transparent;
  }

  .hero-subtitle {
    font-size: 16px;
    color: var(--text-300);
    max-width: 600px;
    margin: 0 auto 40px;
    line-height: 1.7;
  }

  .hero-buttons {
    display: flex;
    gap: 16px;
    justify-content: center;
    flex-wrap: wrap;
  }

  .btn-primary {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 14px 36px;
    font-size: 15px;
    font-weight: 600;
    color: #fff;
    background: linear-gradient(135deg, var(--primary-500), var(--secondary-500));
    border-radius: 40px;
    box-shadow: var(--glow-primary);
    transition: all 0.3s ease;
    white-space: nowrap;
    border: none;
  }

  .btn-primary:hover {
    box-shadow: var(--glow-primary-hover);
    transform: translateY(-2px);
  }

  .btn-primary:active {
    transform: translateY(0);
    box-shadow: 0 0 16px rgba(0,213,255,0.3);
  }

  .btn-outline {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 13px 34px;
    font-size: 15px;
    font-weight: 500;
    color: var(--text-100);
    background: rgba(255,255,255,0.04);
    border: 1px solid rgba(255,255,255,0.15);
    border-radius: 40px;
    backdrop-filter: blur(8px);
    transition: all 0.3s ease;
    white-space: nowrap;
  }

  .btn-outline:hover {
    border-color: rgba(0,213,255,0.4);
    color: var(--primary-400);
    background: rgba(0,213,255,0.06);
    transform: translateY(-2px);
  }

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

  .scroll-indicator {
    position: absolute;
    bottom: 32px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
    color: var(--text-500);
    font-size: 12px;
    z-index: 2;
    animation: scrollHint 2.5s ease-in-out infinite;
  }

  .scroll-indicator .line {
    width: 1px;
    height: 36px;
    background: linear-gradient(180deg, rgba(255,255,255,0.4), transparent);
  }

  .scroll-indicator .arrow {
    width: 16px;
    height: 16px;
    border-left: 2px solid var(--text-500);
    border-bottom: 2px solid var(--text-500);
    transform: rotate(-45deg);
  }

  @keyframes scrollHint {
    0%, 100% {
      opacity: 0.4;
      transform: translateX(-50%) translateY(0);
    }
    50% {
      opacity: 0.9;
      transform: translateX(-50%) translateY(6px);
    }
  }

  .stars i {
    position: absolute;
    width: 2px;
    height: 2px;
    background: #fff;
    border-radius: 50%;
    opacity: 0.3;
    animation: twinkle 3s ease-in-out infinite;
    z-index: 1;
  }

  .stars i:nth-child(odd) {
    width: 1px;
    height: 1px;
  }

  @keyframes twinkle {
    0%, 100% { opacity: 0.2; transform: scale(1); }
    50% { opacity: 0.9; transform: scale(1.4); }
  }

  /* ===== Stats Band ===== */
  .stats-band {
    border-top: 1px solid rgba(255,255,255,0.05);
    border-bottom: 1px solid rgba(255,255,255,0.05);
    background: rgba(5,13,24,0.4);
    padding-block: 36px;
  }

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

  .stat-item .stat-number {
    font-size: clamp(30px, 4vw, 42px);
    font-weight: 800;
    background: linear-gradient(135deg, var(--primary-400), var(--secondary-400));
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    color: transparent;
    line-height: 1.2;
  }

  .stat-item .stat-label {
    font-size: 13px;
    color: var(--text-500);
    margin-top: 6px;
  }

  @media (max-width: 768px) {
    .stats-grid {
      grid-template-columns: repeat(2, 1fr);
      gap: 28px 16px;
    }
  }

  /* ===== How To ===== */
  .howto-layout {
    display: grid;
    grid-template-columns: repeat(12, 1fr);
    gap: 48px;
    align-items: start;
  }

  .howto-text-col {
    grid-column: span 12;
  }

  .howto-text-col p {
    color: var(--text-300);
    font-size: 16px;
    line-height: 1.8;
    margin-bottom: 20px;
  }

  .howto-link {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    color: var(--primary-400);
    font-size: 15px;
    font-weight: 500;
    transition: gap 0.3s ease;
  }

  .howto-link:hover {
    gap: 10px;
    color: var(--primary-500);
  }

  @media (min-width: 1024px) {
    .howto-text-col {
      grid-column: span 5;
    }
    .howto-timeline-col {
      grid-column: span 7;
    }
  }

  .timeline {
    position: relative;
    padding-left: 28px;
  }

  .timeline::before {
    content: '';
    position: absolute;
    left: 7px;
    top: 8px;
    bottom: 8px;
    width: 2px;
    background: linear-gradient(180deg, var(--primary-500) 0%, var(--secondary-500) 60%, transparent 100%);
    border-radius: 2px;
  }

  .timeline-item {
    position: relative;
    margin-bottom: 24px;
  }

  .timeline-item:last-child {
    margin-bottom: 0;
  }

  .timeline-dot {
    position: absolute;
    left: -28px;
    top: 28px;
    width: 16px;
    height: 16px;
    border-radius: 50%;
    background: var(--bg-900);
    border: 2px solid var(--primary-500);
    box-shadow: 0 0 12px rgba(0,213,255,0.5);
    display: flex;
    align-items: center;
    justify-content: center;
  }

  .timeline-card {
    background: linear-gradient(145deg, rgba(255,255,255,0.08) 0%, rgba(255,255,255,0.02) 100%);
    backdrop-filter: blur(14px);
    -webkit-backdrop-filter: blur(14px);
    border: 1px solid rgba(255,255,255,0.08);
    border-radius: var(--radius-lg);
    box-shadow: var(--card-shadow);
    padding: 24px 28px;
    display: flex;
    align-items: center;
    gap: 20px;
    transition: transform 0.3s ease, box-shadow 0.3s ease, border-color 0.3s ease;
  }

  .timeline-card:hover {
    transform: translateY(-2px);
    box-shadow: 0 16px 40px rgba(0,0,0,0.35), 0 0 0 1px rgba(0,213,255,0.2);
    border-color: rgba(0,213,255,0.2);
  }

  .step-num {
    width: 52px;
    height: 52px;
    flex-shrink: 0;
    border-radius: 50%;
    background: linear-gradient(135deg, rgba(0,213,255,0.15), rgba(123,97,255,0.15));
    border: 1px solid rgba(0,213,255,0.3);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 14px;
    font-weight: 800;
    color: var(--primary-400);
    box-shadow: 0 0 20px rgba(0,213,255,0.15);
  }

  .timeline-card h3 {
    font-size: 18px;
    font-weight: 600;
    color: var(--text-100);
    margin-bottom: 4px;
  }

  .timeline-card p {
    font-size: 14px;
    color: var(--text-300);
    line-height: 1.6;
  }

  .timeline-card .card-arrow {
    margin-left: auto;
    color: var(--primary-500);
    opacity: 0;
    transform: translateX(-6px);
    transition: all 0.3s ease;
    font-size: 18px;
  }

  .timeline-card:hover .card-arrow {
    opacity: 1;
    transform: translateX(0);
  }

  @media (max-width: 640px) {
    .timeline-card {
      padding: 18px 20px;
      gap: 14px;
      flex-wrap: wrap;
    }
    .timeline-card .card-arrow {
      display: none;
    }
    .step-num {
      width: 44px;
      height: 44px;
      font-size: 13px;
    }
  }

  /* ===== Rewards ===== */
  .reward-wide {
    background: linear-gradient(145deg, rgba(255,255,255,0.1) 0%, rgba(255,255,255,0.03) 100%);
    backdrop-filter: blur(14px);
    -webkit-backdrop-filter: blur(14px);
    border: 1px solid rgba(255,255,255,0.1);
    border-radius: var(--radius-lg);
    box-shadow: var(--card-shadow);
    padding: 32px 36px;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    gap: 16px;
    position: relative;
    overflow: hidden;
    transition: transform 0.3s ease, box-shadow 0.3s ease, border-color 0.3s ease;
    min-height: 220px;
  }

  .reward-wide::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: linear-gradient(90deg, transparent, rgba(0,213,255,0.5), rgba(123,97,255,0.5), transparent);
  }

  .reward-wide:hover {
    transform: translateY(-2px);
    box-shadow: 0 16px 40px rgba(0,0,0,0.35), 0 0 0 1px rgba(0,213,255,0.15);
  }

  .reward-wide-top {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    gap: 16px;
    flex-wrap: wrap;
  }

  .reward-wide h3 {
    font-size: 22px;
    font-weight: 700;
    color: var(--text-100);
    margin-bottom: 6px;
  }

  .reward-wide .reward-desc {
    font-size: 14px;
    color: var(--text-300);
  }

  .reward-number {
    font-size: clamp(48px, 6vw, 80px);
    font-weight: 800;
    line-height: 1;
    background: linear-gradient(135deg, var(--primary-400), var(--secondary-400));
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    color: transparent;
  }

  .reward-unit {
    font-size: 18px;
    font-weight: 600;
    color: var(--text-300);
    margin-left: 8px;
    -webkit-text-fill-color: currentColor;
  }

  .reward-small {
    background: linear-gradient(145deg, rgba(255,255,255,0.08) 0%, rgba(255,255,255,0.02) 100%);
    backdrop-filter: blur(14px);
    -webkit-backdrop-filter: blur(14px);
    border: 1px solid rgba(255,255,255,0.08);
    border-radius: var(--radius-lg);
    box-shadow: var(--card-shadow);
    padding: 28px 30px;
    position: relative;
    overflow: hidden;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    display: flex;
    flex-direction: column;
    min-height: 280px;
  }

  .reward-small::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: linear-gradient(90deg, transparent, rgba(0,213,255,0.4), rgba(123,97,255,0.4), transparent);
  }

  .reward-small:hover {
    transform: translateY(-2px);
    box-shadow: 0 16px 40px rgba(0,0,0,0.35), 0 0 0 1px rgba(0,213,255,0.15);
  }

  .reward-icon {
    width: 48px;
    height: 48px;
    border-radius: 14px;
    background: linear-gradient(135deg, rgba(0,213,255,0.15), rgba(123,97,255,0.15));
    border: 1px solid rgba(0,213,255,0.2);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 20px;
    box-shadow: 0 0 20px rgba(0,213,255,0.12);
    color: var(--primary-400);
  }

  .reward-small h3 {
    font-size: 18px;
    font-weight: 600;
    color: var(--text-100);
    margin-bottom: 8px;
  }

  .reward-small p {
    font-size: 14px;
    color: var(--text-300);
    line-height: 1.65;
    flex: 1;
  }

  .reward-tag {
    margin-top: 16px;
    display: inline-flex;
    align-items: center;
    padding: 5px 14px;
    font-size: 12px;
    font-weight: 600;
    color: var(--primary-400);
    background: rgba(0,213,255,0.08);
    border: 1px solid rgba(0,213,255,0.2);
    border-radius: 40px;
    width: fit-content;
  }

  /* ===== Mission ===== */
  .mission-layout {
    display: grid;
    grid-template-columns: repeat(12, 1fr);
    gap: 32px;
  }

  .mission-left {
    grid-column: span 12;
  }

  .mission-right {
    grid-column: span 12;
  }

  @media (min-width: 1024px) {
    .mission-left {
      grid-column: span 5;
    }
    .mission-right {
      grid-column: span 7;
    }
  }

  .mission-panel {
    background: linear-gradient(145deg, rgba(255,255,255,0.08) 0%, rgba(255,255,255,0.02) 100%);
    backdrop-filter: blur(14px);
    -webkit-backdrop-filter: blur(14px);
    border: 1px solid rgba(255,255,255,0.08);
    border-radius: var(--radius-lg);
    box-shadow: var(--card-shadow);
    padding: 32px;
    height: 100%;
    position: relative;
    overflow: hidden;
  }

  .mission-panel::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: linear-gradient(90deg, transparent, rgba(0,213,255,0.4), transparent);
  }

  .ring-wrap {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 24px;
    text-align: center;
  }

  .progress-ring {
    width: 160px;
    height: 160px;
    border-radius: 50%;
    background: conic-gradient(var(--primary-500) 0% 68%, rgba(255,255,255,0.08) 68% 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    box-shadow: 0 0 30px rgba(0,213,255,0.2);
  }

  .progress-ring::before {
    content: '';
    position: absolute;
    inset: 10px;
    border-radius: 50%;
    background: var(--bg-800);
    box-shadow: inset 0 2px 12px rgba(0,0,0,0.3);
  }

  .ring-inner {
    position: relative;
    z-index: 1;
    font-size: 36px;
    font-weight: 800;
    background: linear-gradient(135deg, var(--primary-400), var(--secondary-400));
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    color: transparent;
  }

  .mission-status {
    font-size: 15px;
    color: var(--text-300);
    line-height: 1.6;
  }

  .mission-status strong {
    color: var(--text-100);
    font-weight: 600;
  }

  .mission-time {
    font-size: 14px;
    color: var(--text-500);
  }

  .task-list {
    display: flex;
    flex-direction: column;
    gap: 20px;
    margin-top: 8px;
  }

  .task-row {
    background: rgba(255,255,255,0.03);
    border: 1px solid rgba(255,255,255,0.06);
    border-radius: var(--radius-md);
    padding: 18px 20px;
    transition: border-color 0.3s ease, background 0.3s ease;
  }

  .task-row:hover {
    border-color: rgba(0,213,255,0.2);
    background: rgba(255,255,255,0.05);
  }

  .task-head {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 12px;
    margin-bottom: 12px;
    flex-wrap: wrap;
  }

  .task-name {
    font-size: 15px;
    font-weight: 600;
    color: var(--text-100);
  }

  .badge-status {
    display: inline-flex;
    align-items: center;
    padding: 3px 12px;
    font-size: 12px;
    font-weight: 600;
    border-radius: 40px;
    white-space: nowrap;
  }

  .badge-status.active {
    color: var(--primary-400);
    background: rgba(0,213,255,0.08);
    border: 1px solid rgba(0,213,255,0.25);
  }

  .badge-status.claim {
    color: #FFD166;
    background: rgba(255,209,102,0.08);
    border: 1px solid rgba(255,209,102,0.25);
  }

  .badge-status.done {
    color: #4ADE80;
    background: rgba(74,222,128,0.08);
    border: 1px solid rgba(74,222,128,0.25);
  }

  .task-bar {
    height: 6px;
    border-radius: 6px;
    background: rgba(255,255,255,0.08);
    overflow: hidden;
  }

  .task-bar-fill {
    height: 100%;
    border-radius: 6px;
    background: linear-gradient(90deg, var(--primary-500), var(--secondary-500));
    box-shadow: 0 0 12px rgba(0,213,255,0.4);
  }

  .task-bar-fill.done {
    background: linear-gradient(90deg, #4ADE80, #00D5FF);
    box-shadow: 0 0 12px rgba(74,222,128,0.3);
  }

  .task-bar-fill.claim-ready {
    background: linear-gradient(90deg, #FFD166, #00D5FF);
    box-shadow: 0 0 12px rgba(255,209,102,0.3);
  }

  .refresh-btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    margin-top: 20px;
    padding: 10px 18px;
    font-size: 13px;
    font-weight: 500;
    color: var(--text-300);
    background: rgba(255,255,255,0.04);
    border: 1px solid rgba(255,255,255,0.1);
    border-radius: 40px;
    transition: all 0.3s ease;
  }

  .refresh-btn:hover {
    color: var(--primary-400);
    border-color: rgba(0,213,255,0.3);
    background: rgba(0,213,255,0.06);
  }

  .refresh-btn svg {
    transition: transform 0.5s ease;
  }

  .refresh-btn:hover svg {
    transform: rotate(180deg);
  }

  /* ===== CTA ===== */
  .cta-section {
    position: relative;
    padding-block: clamp(80px, 10vw, 120px);
    text-align: center;
    background-image: linear-gradient(rgba(5,13,24,0.82), rgba(5,13,24,0.92)), url('/assets/images/backpic/back-2.png');
    background-size: cover;
    background-position: center;
    background-attachment: fixed;
    overflow: hidden;
  }

  .cta-section::after {
    content: '';
    position: absolute;
    inset: 0;
    background-image: linear-gradient(rgba(255,255,255,0.03) 1px, transparent 1px),
      linear-gradient(90deg, rgba(255,255,255,0.03) 1px, transparent 1px);
    background-size: 48px 48px;
    pointer-events: none;
  }

  @media (max-width: 768px) {
    .cta-section {
      background-attachment: scroll;
    }
  }

  .cta-content {
    position: relative;
    z-index: 2;
    max-width: 720px;
    margin-inline: auto;
  }

  .cta-content h2 {
    font-size: clamp(28px, 4vw, 44px);
    font-weight: 800;
    line-height: 1.25;
    color: var(--text-100);
    margin-bottom: 16px;
  }

  .cta-content h2 .gradient-text {
    background: linear-gradient(135deg, var(--primary-400), var(--secondary-400));
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    color: transparent;
  }

  .cta-content p {
    font-size: 15px;
    color: var(--text-300);
    margin-bottom: 36px;
  }

  .cta-section .btn-primary {
    position: relative;
    z-index: 2;
  }

  .cta-section .btn-primary::before {
    content: '';
    position: absolute;
    inset: 0;
    border-radius: inherit;
    box-shadow: 0 0 0 0 rgba(0,213,255,0.4);
    animation: pulse-ring 2.5s ease-out infinite;
    pointer-events: none;
  }

  @keyframes pulse-ring {
    0% {
      box-shadow: 0 0 0 0 rgba(0,213,255,0.4);
    }
    70% {
      box-shadow: 0 0 0 24px rgba(0,213,255,0);
    }
    100% {
      box-shadow: 0 0 0 0 rgba(0,213,255,0);
    }
  }

  /* ===== News ===== */
  .news-section {
    background: rgba(5,13,24,0.3);
  }

  .news-grid {
    display: grid;
    grid-template-columns: repeat(12, 1fr);
    gap: 24px;
  }

  .news-card {
    grid-column: span 12;
    background: linear-gradient(145deg, rgba(255,255,255,0.06) 0%, rgba(255,255,255,0.02) 100%);
    backdrop-filter: blur(14px);
    -webkit-backdrop-filter: blur(14px);
    border: 1px solid rgba(255,255,255,0.08);
    border-radius: var(--radius-lg);
    box-shadow: 0 8px 24px rgba(0,0,0,0.25);
    overflow: hidden;
    display: flex;
    flex-direction: column;
    transition: transform 0.3s ease, box-shadow 0.3s ease, border-color 0.3s ease;
  }

  @media (min-width: 640px) {
    .news-card {
      grid-column: span 6;
    }
  }

  @media (min-width: 1024px) {
    .news-card {
      grid-column: span 4;
    }
  }

  .news-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 16px 40px rgba(0,0,0,0.35), 0 0 0 1px rgba(0,213,255,0.15);
    border-color: rgba(0,213,255,0.15);
  }

  .news-cover {
    position: relative;
    aspect-ratio: 16 / 10;
    overflow: hidden;
    background: var(--bg-800);
  }

  .news-cover img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.6s ease;
  }

  .news-card:hover .news-cover img {
    transform: scale(1.05);
  }

  .badge-category {
    position: absolute;
    top: 12px;
    left: 12px;
    display: inline-block;
    padding: 4px 12px;
    font-size: 12px;
    font-weight: 600;
    color: var(--primary-400);
    background: rgba(5,13,24,0.75);
    backdrop-filter: blur(8px);
    border: 1px solid rgba(0,213,255,0.25);
    border-radius: var(--radius-sm);
  }

  .news-body {
    padding: 20px 24px 22px;
    display: flex;
    flex-direction: column;
    flex: 1;
    gap: 10px;
  }

  .news-body h3 {
    font-size: 17px;
    font-weight: 600;
    color: var(--text-100);
    line-height: 1.45;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
    min-height: 48px;
  }

  .news-body p {
    font-size: 14px;
    color: var(--text-300);
    line-height: 1.65;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
    flex: 1;
  }

  .news-meta {
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 13px;
    color: var(--text-500);
    padding-top: 12px;
    border-top: 1px solid rgba(255,255,255,0.05);
    flex-wrap: wrap;
  }

  .news-meta .meta-date {
    display: inline-flex;
    align-items: center;
    gap: 6px;
  }

  .news-meta .meta-cat {
    color: var(--primary-400);
    opacity: 0.8;
  }

  .news-meta .meta-link {
    margin-left: auto;
    color: var(--text-300);
    transition: color 0.3s ease;
    font-weight: 500;
  }

  .news-card:hover .meta-link {
    color: var(--primary-400);
  }

  .empty-state {
    grid-column: 1 / -1;
    text-align: center;
    padding: 56px 24px;
    border: 1px dashed rgba(255,255,255,0.12);
    border-radius: var(--radius-lg);
    background: rgba(255,255,255,0.02);
  }

  .empty-icon {
    width: 48px;
    height: 48px;
    margin: 0 auto 16px;
    border-radius: 50%;
    border: 1px solid rgba(255,255,255,0.15);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-500);
    font-size: 20px;
  }

  .empty-state h3 {
    font-size: 18px;
    font-weight: 600;
    color: var(--text-100);
    margin-bottom: 8px;
  }

  .empty-state p {
    font-size: 14px;
    color: var(--text-500);
  }

  /* ===== Footer ===== */
  .site-footer {
    background: var(--bg-950);
    border-top: 1px solid rgba(255,255,255,0.05);
    padding-top: 64px;
    position: relative;
  }

  .footer-top {
    display: grid;
    grid-template-columns: repeat(12, 1fr);
    gap: 32px;
    padding-bottom: 48px;
    border-bottom: 1px solid rgba(255,255,255,0.05);
  }

  .footer-brand {
    grid-column: span 12;
  }

  @media (min-width: 768px) {
    .footer-brand {
      grid-column: span 5;
    }
  }

  .footer-brand .logo {
    font-size: 24px;
    margin-bottom: 16px;
  }

  .footer-brand p {
    font-size: 14px;
    color: var(--text-300);
    max-width: 360px;
    line-height: 1.75;
    margin-bottom: 20px;
  }

  .qr-placeholder {
    width: 88px;
    height: 88px;
    border-radius: 12px;
    border: 1px solid rgba(255,255,255,0.15);
    background:
      radial-gradient(circle at 25% 25%, rgba(0,213,255,0.25) 2px, transparent 2px),
      radial-gradient(circle at 70% 30%, rgba(255,255,255,0.2) 2px, transparent 2px),
      radial-gradient(circle at 40% 60%, rgba(123,97,255,0.25) 2px, transparent 2px),
      radial-gradient(circle at 80% 75%, rgba(255,255,255,0.15) 2px, transparent 2px),
      radial-gradient(circle at 15% 80%, rgba(0,213,255,0.2) 2px, transparent 2px),
      radial-gradient(circle at 55% 15%, rgba(255,255,255,0.2) 2px, transparent 2px),
      radial-gradient(circle at 90% 55%, rgba(123,97,255,0.2) 2px, transparent 2px);
    background-color: rgba(255,255,255,0.05);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 13px;
    font-weight: 500;
    color: var(--text-300);
    position: relative;
    overflow: hidden;
  }

  .qr-placeholder span {
    background: rgba(5,13,24,0.85);
    padding: 4px 8px;
    border-radius: 6px;
    font-size: 12px;
    text-align: center;
    line-height: 1.4;
  }

  .footer-links {
    grid-column: span 6;
  }

  .footer-links-sm {
    grid-column: span 6;
  }

  @media (min-width: 768px) {
    .footer-links,
    .footer-links-sm {
      grid-column: span 3;
    }
  }

  .footer-links h4,
  .footer-links-sm h4 {
    font-size: 15px;
    font-weight: 600;
    color: var(--text-100);
    margin-bottom: 16px;
  }

  .footer-links ul,
  .footer-links-sm ul {
    list-style: none;
  }

  .footer-links li,
  .footer-links-sm li {
    margin-bottom: 10px;
  }

  .footer-links a,
  .footer-links-sm a {
    font-size: 14px;
    color: var(--text-300);
    transition: color 0.3s ease, padding-left 0.3s ease;
  }

  .footer-links a:hover,
  .footer-links-sm a:hover {
    color: var(--primary-400);
    padding-left: 4px;
  }

  .footer-bottom {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    padding-block: 24px;
    flex-wrap: wrap;
    font-size: 13px;
    color: var(--text-500);
  }

  .footer-bottom a:hover {
    color: var(--primary-400);
  }

  .back-top {
    width: 38px;
    height: 38px;
    border-radius: 50%;
    border: 1px solid rgba(255,255,255,0.12);
    background: rgba(255,255,255,0.03);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    color: var(--text-300);
    transition: all 0.3s ease;
  }

  .back-top:hover {
    border-color: rgba(0,213,255,0.4);
    color: var(--primary-400);
    box-shadow: 0 0 16px rgba(0,213,255,0.15);
  }

  /* ===== Animations ===== */
  .fade-in-up {
    opacity: 0;
    transform: translateY(16px);
    transition: opacity 0.5s ease, transform 0.5s ease;
  }

  .fade-in-up.visible {
    opacity: 1;
    transform: translateY(0);
  }

  /* ===== Responsive ===== */
  @media (max-width: 1023px) {
    .nav-left,
    .nav-right {
      gap: 4px;
    }

    .nav-link {
      font-size: 14px;
      padding: 6px 10px;
    }

    .btn-login {
      padding: 8px 18px;
      font-size: 13px;
    }
  }

  @media (max-width: 767px) {
    .nav-left,
    .nav-right {
      display: none;
    }

    .hamburger {
      display: flex;
    }

    .nav-container {
      height: 60px;
    }

    .logo {
      position: absolute;
      left: 50%;
      transform: translateX(-50%);
    }

    .mobile-login {
      margin-left: auto;
      z-index: 102;
    }

    .btn-login-sm {
      display: inline-flex;
      align-items: center;
      padding: 8px 18px;
      font-size: 13px;
      font-weight: 600;
      color: #fff;
      background: linear-gradient(135deg, var(--primary-500), var(--secondary-500));
      border-radius: 40px;
      box-shadow: var(--glow-primary);
      transition: all 0.3s ease;
      white-space: nowrap;
    }
  }

  @media (min-width: 768px) {
    .mobile-login {
      display: none;
    }
  }

  @media (max-width: 768px) {
    .container {
      padding-inline: 16px;
    }

    .hero {
      padding: 100px 16px 60px;
    }

    .hero-buttons {
      flex-direction: column;
      gap: 12px;
      width: 100%;
    }

    .hero-buttons .btn-primary,
    .hero-buttons .btn-outline {
      width: 100%;
    }

    .section-title {
      font-size: 24px;
    }

    .howto-layout {
      gap: 32px;
    }

    .reward-wide {
      padding: 24px;
    }

    .reward-wide-top {
      flex-direction: column;
    }

    .footer-top {
      gap: 24px;
    }
  }

  @media (max-width: 480px) {
    .reward-number {
      font-size: 48px;
    }

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

/* roulang page: category1 */
:root {
      --primary-500: #00D5FF;
      --primary-400: #38E8FF;
      --primary-600: #009FCC;
      --secondary-500: #7B61FF;
      --secondary-400: #9D86FF;
      --bg-950: #050D18;
      --bg-900: #091428;
      --bg-800: #0E1F3D;
      --bg-700: #15294F;
      --text-100: #F2F7FF;
      --text-300: #A9B9D4;
      --text-500: #64748B;
      --radius-lg: 24px;
      --radius-md: 14px;
      --radius-sm: 8px;
      --shadow-card: 0 8px 32px rgba(0, 0, 0, 0.25);
      --shadow-glow: 0 0 24px rgba(0, 213, 255, 0.35);
      --grad-primary: linear-gradient(135deg, #00D5FF 0%, #7B61FF 100%);
    }

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

    html {
      scroll-behavior: smooth;
      scroll-padding-top: 88px;
    }

    body {
      font-family: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
      background-color: var(--bg-900);
      background-image:
        radial-gradient(1200px 600px at 80% -10%, rgba(123, 97, 255, 0.15), transparent 60%),
        radial-gradient(800px 400px at 10% 10%, rgba(0, 213, 255, 0.12), transparent 60%);
      color: var(--text-100);
      line-height: 1.7;
      font-size: 16px;
      overflow-x: hidden;
      -webkit-font-smoothing: antialiased;
    }

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

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

    ul {
      list-style: none;
    }

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

    .container {
      max-width: 1280px;
      margin-inline: auto;
      padding-inline: 24px;
    }

    .grad-text {
      background: linear-gradient(135deg, #00D5FF 0%, #7B61FF 100%);
      -webkit-background-clip: text;
      background-clip: text;
      -webkit-text-fill-color: transparent;
      color: transparent;
    }

    .section-tag {
      display: inline-flex;
      align-items: center;
      gap: 10px;
      font-size: 12px;
      font-weight: 700;
      letter-spacing: 0.2em;
      color: var(--primary-400);
      text-transform: uppercase;
    }
    .section-tag::before {
      content: "";
      width: 16px;
      height: 2px;
      background: var(--grad-primary);
      border-radius: 2px;
      display: inline-block;
    }

    /* ======== Header / Nav ======== */
    .site-header {
      position: fixed;
      top: 0;
      left: 0;
      right: 0;
      z-index: 100;
      background: rgba(5, 13, 24, 0.75);
      backdrop-filter: blur(16px);
      -webkit-backdrop-filter: blur(16px);
      border-bottom: 1px solid rgba(255, 255, 255, 0.06);
    }

    .header-inner {
      position: relative;
      display: grid;
      grid-template-columns: 1fr auto 1fr;
      align-items: center;
      min-height: 72px;
      gap: 16px;
    }

    .nav-left,
    .nav-right {
      display: flex;
      align-items: center;
      gap: 8px;
    }

    .nav-left {
      justify-content: flex-start;
    }
    .nav-right {
      justify-content: flex-end;
    }

    .nav-link {
      display: inline-block;
      padding: 8px 14px;
      font-size: 15px;
      font-weight: 500;
      color: var(--text-300);
      border-radius: 8px;
      position: relative;
      transition: color .3s ease;
    }

    .nav-link::after {
      content: "";
      position: absolute;
      left: 14px;
      right: 14px;
      bottom: 2px;
      height: 2px;
      border-radius: 2px;
      background: var(--grad-primary);
      transform: scaleX(0);
      opacity: 0;
      transition: transform .3s ease, opacity .3s ease;
    }

    .nav-link:hover,
    .nav-link.active {
      color: var(--primary-400);
    }
    .nav-link:hover::after,
    .nav-link.active::after {
      transform: scaleX(1);
      opacity: 1;
    }

    .logo {
      display: inline-flex;
      align-items: center;
      gap: 4px;
      font-size: 22px;
      font-weight: 800;
      letter-spacing: -0.02em;
      color: #fff;
      line-height: 1;
    }

    .logo-dot {
      width: 6px;
      height: 6px;
      border-radius: 50%;
      background: #00D5FF;
      box-shadow: 0 0 10px #00D5FF, 0 0 18px rgba(0, 213, 255, 0.5);
      display: inline-block;
      animation: dotPulse 2.4s ease-in-out infinite;
    }

    @keyframes dotPulse {
      0%, 100% { opacity: .7; transform: scale(.92); }
      50% { opacity: 1; transform: scale(1.12); }
    }

    .btn-login {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      padding: 8px 20px;
      font-size: 14px;
      font-weight: 600;
      color: #fff;
      border-radius: 999px;
      background: var(--grad-primary);
      box-shadow: 0 0 24px rgba(0, 213, 255, 0.35), 0 4px 12px rgba(0, 0, 0, 0.3);
      transition: box-shadow .3s ease, transform .3s ease;
    }
    .btn-login:hover {
      box-shadow: 0 0 40px rgba(0, 213, 255, 0.55), 0 4px 18px rgba(0, 0, 0, 0.35);
      transform: translateY(-2px);
    }
    .btn-login:active {
      transform: translateY(0);
      box-shadow: 0 0 16px rgba(0, 213, 255, 0.3);
    }

    .nav-toggle {
      display: none;
      flex-direction: column;
      gap: 5px;
      padding: 8px;
      border-radius: 8px;
      z-index: 110;
    }
    .nav-toggle span {
      width: 22px;
      height: 2px;
      background: var(--primary-400);
      border-radius: 2px;
      box-shadow: 0 0 8px rgba(0, 213, 255, 0.6);
      transition: transform .3s ease, opacity .3s ease;
    }
    .nav-toggle.active span:nth-child(1) {
      transform: translateY(7px) rotate(45deg);
    }
    .nav-toggle.active span:nth-child(2) {
      opacity: 0;
    }
    .nav-toggle.active span:nth-child(3) {
      transform: translateY(-7px) rotate(-45deg);
    }

    .mobile-drawer {
      position: fixed;
      inset: 0;
      z-index: 95;
      background: rgba(5, 13, 24, 0.97);
      display: flex;
      flex-direction: column;
      align-items: center;
      justify-content: center;
      gap: 28px;
      opacity: 0;
      visibility: hidden;
      transition: opacity .35s ease, visibility .35s ease;
    }
    .mobile-drawer.open {
      opacity: 1;
      visibility: visible;
    }
    .drawer-link {
      font-size: 22px;
      font-weight: 600;
      color: var(--text-300);
      padding: 10px 24px;
      position: relative;
      transition: color .3s ease;
    }
    .drawer-link:hover,
    .drawer-link.active {
      color: var(--primary-400);
    }
    .drawer-link::after {
      content: "→";
      position: absolute;
      right: -8px;
      top: 50%;
      transform: translateY(-50%);
      font-size: 16px;
      color: var(--primary-400);
      opacity: 0;
      transition: opacity .3s ease, right .3s ease;
    }
    .drawer-link:hover::after,
    .drawer-link.active::after {
      opacity: 1;
      right: -16px;
    }
    .drawer-login {
      margin-top: 12px;
      padding: 12px 48px;
      font-size: 16px;
      border-radius: 999px;
    }

    /* ======== Hero ======== */
    .page-hero {
      position: relative;
      min-height: 72vh;
      display: flex;
      align-items: center;
      justify-content: center;
      padding: 180px 0 88px;
      background-image:
        linear-gradient(180deg, rgba(5, 13, 24, 0.82) 0%, rgba(9, 20, 40, 0.88) 100%),
        url('/assets/images/backpic/back-1.webp');
      background-size: cover;
      background-position: center;
      overflow: hidden;
    }

    .page-hero::before {
      content: "";
      position: absolute;
      inset: 0;
      background-image:
        linear-gradient(rgba(255, 255, 255, 0.03) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255, 255, 255, 0.03) 1px, transparent 1px);
      background-size: 48px 48px;
      pointer-events: none;
    }

    .hero-inner {
      position: relative;
      z-index: 2;
      text-align: center;
      max-width: 860px;
    }

    .hero-inner .section-tag {
      justify-content: center;
      margin-bottom: 28px;
    }

    .hero-title {
      font-size: clamp(36px, 5vw, 54px);
      font-weight: 800;
      line-height: 1.22;
      margin-bottom: 24px;
      letter-spacing: -0.01em;
    }

    .hero-sub {
      font-size: 17px;
      color: var(--text-300);
      max-width: 640px;
      margin: 0 auto 36px;
      line-height: 1.8;
    }

    .hero-actions {
      display: flex;
      justify-content: center;
      gap: 16px;
      flex-wrap: wrap;
    }

    .btn-primary,
    .btn-ghost {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      padding: 13px 32px;
      font-size: 15px;
      font-weight: 600;
      border-radius: 999px;
      transition: transform .3s ease, box-shadow .3s ease, border-color .3s ease, background .3s ease;
      min-width: 140px;
    }

    .btn-primary {
      background: var(--grad-primary);
      color: #fff;
      box-shadow: 0 0 24px rgba(0, 213, 255, 0.35), 0 4px 12px rgba(0, 0, 0, 0.3);
    }
    .btn-primary:hover {
      transform: translateY(-2px);
      box-shadow: 0 0 40px rgba(0, 213, 255, 0.55), 0 6px 18px rgba(0, 0, 0, 0.35);
    }
    .btn-primary:active {
      transform: translateY(0);
      box-shadow: 0 0 16px rgba(0, 213, 255, 0.3);
    }
    .btn-primary:focus-visible,
    .btn-ghost:focus-visible {
      outline: 3px solid rgba(0, 213, 255, 0.5);
      outline-offset: 3px;
    }

    .btn-ghost {
      background: rgba(255, 255, 255, 0.05);
      backdrop-filter: blur(14px);
      -webkit-backdrop-filter: blur(14px);
      border: 1px solid rgba(255, 255, 255, 0.12);
      color: var(--text-100);
    }
    .btn-ghost:hover {
      border-color: rgba(0, 213, 255, 0.4);
      background: rgba(255, 255, 255, 0.08);
      transform: translateY(-2px);
    }
    .btn-ghost:active {
      transform: translateY(0);
    }

    /* ======== Star field ======== */
    .stars-layer {
      position: absolute;
      inset: 0;
      pointer-events: none;
      z-index: 1;
      overflow: hidden;
    }
    .star {
      position: absolute;
      background: rgba(255, 255, 255, 0.75);
      border-radius: 50%;
      animation: twinkle 3.2s ease-in-out infinite;
      box-shadow: 0 0 6px rgba(255, 255, 255, 0.6);
    }
    @keyframes twinkle {
      0%, 100% { opacity: 0.25; }
      50% { opacity: 1; }
    }

    /* ======== Anchor bar ======== */
    .anchor-bar {
      position: sticky;
      top: 72px;
      z-index: 80;
      background: rgba(5, 13, 24, 0.85);
      backdrop-filter: blur(12px);
      -webkit-backdrop-filter: blur(12px);
      border-bottom: 1px solid rgba(255, 255, 255, 0.05);
      padding: 14px 0;
    }
    .anchor-inner {
      display: flex;
      justify-content: center;
      gap: 12px;
      flex-wrap: wrap;
    }
    .anchor-pill {
      display: inline-flex;
      align-items: center;
      padding: 8px 22px;
      font-size: 14px;
      font-weight: 500;
      color: var(--text-300);
      border-radius: 999px;
      background: rgba(255, 255, 255, 0.05);
      border: 1px solid rgba(255, 255, 255, 0.08);
      transition: color .3s ease, border-color .3s ease, background .3s ease, transform .3s ease;
    }
    .anchor-pill:hover {
      color: var(--primary-400);
      border-color: rgba(0, 213, 255, 0.35);
      background: rgba(0, 213, 255, 0.06);
      transform: translateY(-2px);
    }

    /* ======== Section ======== */
    .section-block {
      position: relative;
      padding-block: clamp(64px, 8vw, 96px);
    }

    .section-block + .section-block {
      border-top: 1px solid rgba(255, 255, 255, 0.04);
    }

    .section-head {
      text-align: center;
      max-width: 720px;
      margin: 0 auto 52px;
    }
    .section-head .section-tag {
      justify-content: center;
      margin-bottom: 16px;
    }
    .section-head h2 {
      font-size: clamp(24px, 3vw, 32px);
      font-weight: 700;
      line-height: 1.3;
      margin-bottom: 12px;
      color: var(--text-100);
    }
    .section-head p {
      font-size: 15px;
      color: var(--text-300);
      line-height: 1.7;
    }

    .glass-card {
      background: linear-gradient(145deg, rgba(255, 255, 255, 0.08) 0%, rgba(255, 255, 255, 0.02) 100%);
      backdrop-filter: blur(14px);
      -webkit-backdrop-filter: blur(14px);
      border: 1px solid rgba(255, 255, 255, 0.08);
      box-shadow: 0 8px 32px rgba(0, 0, 0, 0.25);
      border-radius: var(--radius-lg);
    }

    /* ======== Overview ======== */
    .overview-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 32px;
      align-items: center;
    }
    .overview-text {
      padding: 40px;
    }
    .overview-text h3 {
      font-size: 20px;
      font-weight: 600;
      margin-bottom: 16px;
      color: var(--text-100);
    }
    .overview-text p {
      font-size: 15px;
      color: var(--text-300);
      margin-bottom: 14px;
      line-height: 1.8;
    }
    .text-link {
      display: inline-block;
      font-size: 15px;
      font-weight: 600;
      color: var(--primary-400);
      margin-top: 12px;
      position: relative;
      transition: color .3s ease, padding-left .3s ease;
    }
    .text-link:hover {
      color: var(--primary-light);
      padding-left: 6px;
    }

    .overview-visual {
      position: relative;
    }
    .overview-visual img {
      width: 100%;
      border-radius: var(--radius-lg);
      border: 1px solid rgba(255, 255, 255, 0.08);
      aspect-ratio: 16/10;
      object-fit: cover;
      box-shadow: 0 0 60px rgba(0, 213, 255, 0.08);
    }
    .flow-panel {
      position: absolute;
      left: 50%;
      bottom: -26px;
      transform: translateX(-50%);
      display: flex;
      align-items: center;
      gap: 8px;
      padding: 16px 24px;
      white-space: nowrap;
      border-radius: 18px;
    }
    .flow-step {
      font-size: 13px;
      font-weight: 600;
      color: var(--text-100);
      display: inline-flex;
      align-items: center;
      gap: 6px;
    }
    .flow-step span {
      color: var(--primary-400);
      font-size: 16px;
    }

    /* ======== Beginner ======== */
    .beginner-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 32px;
    }
    .beginner-card {
      padding: 40px 36px;
      position: relative;
      overflow: hidden;
      transition: transform .3s ease, box-shadow .3s ease, border-color .3s ease;
    }
    .beginner-card::before {
      content: "";
      position: absolute;
      top: 0;
      left: 0;
      right: 0;
      height: 1px;
      background: linear-gradient(90deg, transparent, rgba(0, 213, 255, 0.4), transparent);
      opacity: 0;
      transition: opacity .3s ease;
    }
    .beginner-card:hover {
      transform: translateY(-4px);
      box-shadow: 0 16px 40px rgba(0, 0, 0, 0.35), 0 0 0 1px rgba(0, 213, 255, 0.2);
      border-color: rgba(0, 213, 255, 0.25);
    }
    .beginner-card:hover::before {
      opacity: 1;
    }
    .beginner-icon {
      width: 48px;
      height: 48px;
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 16px;
      font-weight: 800;
      color: var(--primary-400);
      background: rgba(0, 213, 255, 0.08);
      border: 1px solid rgba(0, 213, 255, 0.25);
      box-shadow: 0 0 18px rgba(0, 213, 255, 0.12);
      margin-bottom: 24px;
    }
    .beginner-card h3 {
      font-size: 20px;
      font-weight: 600;
      color: var(--text-100);
      margin-bottom: 18px;
    }
    .beginner-card ul li {
      display: flex;
      align-items: flex-start;
      gap: 12px;
      font-size: 15px;
      color: var(--text-300);
      line-height: 1.7;
      margin-bottom: 12px;
    }
    .beginner-card ul li::before {
      content: "";
      flex-shrink: 0;
      width: 7px;
      height: 7px;
      border-radius: 50%;
      background: var(--grad-primary);
      margin-top: 9px;
      box-shadow: 0 0 6px rgba(0, 213, 255, 0.5);
    }

    /* ======== Timeline ======== */
    .timeline-wrap {
      max-width: 720px;
      margin: 0 auto;
      position: relative;
      padding-left: 56px;
    }
    .timeline-wrap::before {
      content: "";
      position: absolute;
      left: 16px;
      top: 8px;
      bottom: 8px;
      width: 2px;
      background: linear-gradient(180deg, #00D5FF, #7B61FF, transparent);
      border-radius: 2px;
    }
    .timeline-item {
      position: relative;
      margin-bottom: 28px;
    }
    .timeline-marker {
      position: absolute;
      left: -56px;
      top: 12px;
      width: 34px;
      height: 34px;
      border-radius: 50%;
      background: var(--bg-800);
      border: 1px solid rgba(0, 213, 255, 0.45);
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 13px;
      font-weight: 700;
      color: var(--primary-400);
      box-shadow: 0 0 14px rgba(0, 213, 255, 0.15);
    }
    .timeline-card {
      padding: 28px 32px;
      border-radius: var(--radius-lg);
      transition: transform .3s ease, box-shadow .3s ease, border-color .3s ease;
    }
    .timeline-card:hover {
      transform: translateY(-3px);
      box-shadow: 0 14px 36px rgba(0, 0, 0, 0.3), 0 0 0 1px rgba(0, 213, 255, 0.18);
    }
    .timeline-card h3 {
      font-size: 18px;
      font-weight: 600;
      color: var(--text-100);
      margin-bottom: 10px;
    }
    .timeline-card p {
      font-size: 14px;
      color: var(--text-300);
      line-height: 1.75;
    }

    /* ======== Strategy ======== */
    .strategy-list {
      display: flex;
      flex-direction: column;
      gap: 24px;
      max-width: 960px;
      margin: 0 auto;
    }
    .strategy-card {
      display: grid;
      grid-template-columns: 260px 1fr;
      overflow: hidden;
      transition: transform .3s ease, box-shadow .3s ease, border-color .3s ease;
    }
    .strategy-card:hover {
      transform: translateY(-4px);
      box-shadow: 0 16px 40px rgba(0, 0, 0, 0.35), 0 0 0 1px rgba(0, 213, 255, 0.2);
      border-color: rgba(0, 213, 255, 0.2);
    }
    .strategy-card img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      min-height: 180px;
      transition: transform .6s ease;
    }
    .strategy-card:hover img {
      transform: scale(1.05);
    }
    .strategy-body {
      padding: 32px 36px;
      display: flex;
      flex-direction: column;
      justify-content: center;
    }
    .strategy-body h3 {
      font-size: 20px;
      font-weight: 600;
      color: var(--text-100);
      margin-bottom: 12px;
    }
    .strategy-body p {
      font-size: 15px;
      color: var(--text-300);
      line-height: 1.8;
    }

    /* ======== FAQ ======== */
    .faq-list {
      max-width: 800px;
      margin: 0 auto;
      display: flex;
      flex-direction: column;
      gap: 16px;
    }
    .faq-item {
      border-radius: var(--radius-lg);
      overflow: hidden;
      transition: border-color .3s ease, box-shadow .3s ease;
    }
    .faq-item:hover {
      border-color: rgba(0, 213, 255, 0.2);
    }
    .faq-item summary {
      list-style: none;
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 16px;
      padding: 22px 28px;
      cursor: pointer;
      font-size: 16px;
      font-weight: 600;
      color: var(--text-100);
      transition: color .3s ease;
    }
    .faq-item summary::-webkit-details-marker {
      display: none;
    }
    .faq-item summary:hover {
      color: var(--primary-400);
    }
    .faq-item[open] summary {
      color: var(--primary-400);
      border-bottom: 1px solid rgba(255, 255, 255, 0.06);
    }
    .faq-icon {
      flex-shrink: 0;
      width: 28px;
      height: 28px;
      border-radius: 50%;
      border: 1px solid rgba(255, 255, 255, 0.12);
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 18px;
      font-weight: 400;
      color: var(--primary-400);
      transition: transform .35s ease, background .3s ease, border-color .3s ease;
    }
    .faq-item[open] .faq-icon {
      transform: rotate(45deg);
      background: rgba(0, 213, 255, 0.08);
      border-color: rgba(0, 213, 255, 0.4);
    }
    .faq-item .faq-body {
      padding: 20px 28px 24px;
      font-size: 15px;
      color: var(--text-300);
      line-height: 1.8;
    }

    /* ======== CTA ======== */
    .cta-block {
      position: relative;
      padding-block: clamp(72px, 9vw, 110px);
      background-image:
        linear-gradient(180deg, rgba(5, 13, 24, 0.88) 0%, rgba(5, 13, 24, 0.94) 100%),
        url('/assets/images/backpic/back-2.png');
      background-size: cover;
      background-position: center;
      background-attachment: fixed;
      text-align: center;
      overflow: hidden;
    }
    .cta-block::before {
      content: "";
      position: absolute;
      inset: 0;
      background-image:
        linear-gradient(rgba(255, 255, 255, 0.03) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255, 255, 255, 0.03) 1px, transparent 1px);
      background-size: 48px 48px;
      pointer-events: none;
    }
    .cta-inner {
      position: relative;
      z-index: 2;
      max-width: 760px;
    }
    .cta-block h2 {
      font-size: clamp(28px, 4vw, 42px);
      font-weight: 800;
      line-height: 1.3;
      margin-bottom: 18px;
      color: var(--text-100);
    }
    .cta-block p {
      font-size: 16px;
      color: var(--text-300);
      margin-bottom: 36px;
      line-height: 1.8;
    }
    .cta-actions {
      display: flex;
      justify-content: center;
      gap: 16px;
      flex-wrap: wrap;
    }
    .btn-primary.ripple:hover {
      animation: rippleGlow 1.2s ease-out infinite;
    }
    @keyframes rippleGlow {
      0% {
        box-shadow: 0 0 0 0 rgba(0, 213, 255, 0.4), 0 0 24px rgba(0, 213, 255, 0.35);
      }
      70% {
        box-shadow: 0 0 0 60px rgba(0, 213, 255, 0), 0 0 24px rgba(0, 213, 255, 0.35);
      }
      100% {
        box-shadow: 0 0 0 0 rgba(0, 213, 255, 0), 0 0 24px rgba(0, 213, 255, 0.35);
      }
    }

    /* ======== Footer ======== */
    .site-footer {
      background: var(--bg-950);
      border-top: 1px solid rgba(255, 255, 255, 0.05);
      padding: 64px 0 28px;
      margin-top: 0;
    }
    .footer-top {
      display: grid;
      grid-template-columns: 2fr 1fr 1fr 1fr 1fr;
      gap: 40px;
      padding-bottom: 48px;
      border-bottom: 1px solid rgba(255, 255, 255, 0.05);
    }
    .footer-brand .logo {
      margin-bottom: 16px;
      display: inline-flex;
    }
    .footer-brand p {
      font-size: 14px;
      color: var(--text-500);
      line-height: 1.8;
      max-width: 280px;
      margin-bottom: 20px;
    }
    .qr-placeholder {
      width: 96px;
      height: 96px;
      border-radius: 14px;
      border: 1px solid rgba(255, 255, 255, 0.1);
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 12px;
      color: var(--text-500);
      text-align: center;
      background: rgba(255, 255, 255, 0.03);
      line-height: 1.5;
    }
    .footer-links h4,
    .footer-links-sm h4 {
      font-size: 15px;
      font-weight: 600;
      color: var(--text-100);
      margin-bottom: 18px;
    }
    .footer-links ul,
    .footer-links-sm ul {
      display: flex;
      flex-direction: column;
      gap: 10px;
    }
    .footer-links a,
    .footer-links-sm a {
      font-size: 14px;
      color: var(--text-500);
      transition: color .3s ease, padding-left .3s ease;
    }
    .footer-links a:hover,
    .footer-links-sm a:hover {
      color: var(--primary-400);
      padding-left: 4px;
    }
    .footer-bottom {
      display: flex;
      align-items: center;
      justify-content: space-between;
      flex-wrap: wrap;
      gap: 12px;
      padding-top: 24px;
      font-size: 13px;
      color: var(--text-500);
    }
    .footer-bottom a {
      color: var(--text-500);
      transition: color .3s ease;
    }
    .footer-bottom a:hover {
      color: var(--primary-400);
    }
    .back-top {
      display: inline-flex;
      align-items: center;
      gap: 6px;
      color: var(--text-500);
      font-size: 13px;
      transition: color .3s ease, transform .3s ease;
    }
    .back-top:hover {
      color: var(--primary-400);
      transform: translateY(-3px);
    }

    /* ======== Responsive ======== */
    @media (max-width: 1023px) {
      .nav-link {
        font-size: 14px;
        padding: 8px 10px;
      }
      .footer-top {
        grid-template-columns: 1fr 1fr 1fr;
      }
      .footer-brand {
        grid-column: 1 / -1;
        max-width: 480px;
      }
    }

    @media (max-width: 767px) {
      .nav-left,
      .nav-right {
        display: none;
      }
      .nav-toggle {
        display: flex;
      }
      .header-inner {
        grid-template-columns: auto 1fr auto;
      }
      .logo {
        justify-self: center;
      }
      .page-hero {
        min-height: 56vh;
        padding: 140px 0 64px;
      }
      .hero-title {
        font-size: clamp(28px, 8vw, 40px);
      }
      .hero-sub {
        font-size: 15px;
      }
      .hero-actions {
        flex-direction: column;
        align-items: center;
      }
      .hero-actions .btn-primary,
      .hero-actions .btn-ghost {
        width: 100%;
        max-width: 320px;
      }
      .anchor-bar {
        top: 62px;
      }
      .anchor-inner {
        justify-content: flex-start;
        overflow-x: auto;
        -webkit-overflow-scrolling: touch;
        flex-wrap: nowrap;
      }
      .anchor-pill {
        flex-shrink: 0;
      }
      .overview-grid {
        grid-template-columns: 1fr;
      }
      .overview-text {
        padding: 28px 24px;
      }
      .flow-panel {
        position: static;
        transform: none;
        margin-top: 16px;
        justify-content: center;
        flex-wrap: wrap;
      }
      .beginner-grid {
        grid-template-columns: 1fr;
      }
      .beginner-card {
        padding: 32px 24px;
      }
      .timeline-wrap {
        padding-left: 40px;
      }
      .timeline-marker {
        left: -40px;
        width: 28px;
        height: 28px;
        font-size: 11px;
      }
      .timeline-card {
        padding: 22px 20px;
      }
      .strategy-card {
        grid-template-columns: 1fr;
      }
      .strategy-card img {
        max-height: 200px;
      }
      .strategy-body {
        padding: 24px 22px;
      }
      .cta-block {
        background-attachment: scroll;
      }
      .cta-actions {
        flex-direction: column;
        align-items: center;
      }
      .cta-actions .btn-primary,
      .cta-actions .btn-ghost {
        width: 100%;
        max-width: 320px;
      }
      .footer-top {
        grid-template-columns: 1fr 1fr;
        gap: 28px;
      }
      .footer-brand {
        grid-column: 1 / -1;
      }
      .footer-bottom {
        justify-content: center;
        text-align: center;
      }
    }

    @media (max-width: 520px) {
      .footer-top {
        grid-template-columns: 1fr;
      }
      .footer-brand,
      .footer-links,
      .footer-links-sm {
        grid-column: 1;
      }
      .section-head h2 {
        font-size: 24px;
      }
      .btn-primary,
      .btn-ghost {
        min-width: 100%;
        max-width: 320px;
      }
    }

/* roulang page: article */
:root {
  --primary-500: #00D5FF;
  --primary-400: #38E8FF;
  --primary-600: #009FCC;
  --secondary-500: #7B61FF;
  --secondary-400: #9D86FF;
  --bg-950: #050D18;
  --bg-900: #091428;
  --bg-800: #0E1F3D;
  --bg-700: #15294F;
  --text-100: #F2F7FF;
  --text-300: #A9B9D4;
  --text-500: #64748B;
}
* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  font-family: 'Inter', 'PingFang SC', 'Microsoft YaHei', 'system-ui', sans-serif;
  background: var(--bg-900);
  color: var(--text-100);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}
img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
button { font-family: inherit; cursor: pointer; border: none; background: none; color: inherit; }
ul, ol { list-style: none; }
input, textarea { font-family: inherit; }

.container {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 24px;
}

/* ===== Header ===== */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  background: rgba(5, 13, 24, 0.75);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
}
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
  position: relative;
  gap: 24px;
}
.logo {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  font-size: 22px;
  font-weight: 800;
  color: var(--text-100);
  letter-spacing: -0.01em;
  line-height: 1;
  white-space: nowrap;
}
.logo-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--primary-500);
  box-shadow: 0 0 10px var(--primary-500);
  animation: pulse-dot 2s ease-in-out infinite;
}
@keyframes pulse-dot {
  0%, 100% { opacity: 1; box-shadow: 0 0 6px var(--primary-500); }
  50% { opacity: 0.7; box-shadow: 0 0 16px var(--primary-400); }
}
.logo-center {
  position: absolute;
  left: 50%;
  transform: translateX(-50%);
}
.nav-left, .nav-right {
  display: flex;
  align-items: center;
  gap: 28px;
}
.nav-left {
  flex: 1;
}
.nav-right {
  flex: 1;
  justify-content: flex-end;
}
.nav-link {
  position: relative;
  font-size: 14px;
  font-weight: 500;
  color: var(--text-300);
  padding: 8px 0;
  transition: color 0.3s;
  white-space: nowrap;
}
.nav-link::after {
  content: '';
  position: absolute;
  left: 0;
  bottom: 0;
  width: 100%;
  height: 2px;
  border-radius: 2px;
  background: linear-gradient(90deg, var(--primary-500), var(--secondary-500));
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.3s;
  box-shadow: 0 0 8px rgba(0, 213, 255, 0.4);
}
.nav-link:hover, .nav-link.active { color: var(--primary-400); }
.nav-link:hover::after, .nav-link.active::after { transform: scaleX(1); }
.btn-login {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  background: linear-gradient(135deg, var(--primary-500), var(--secondary-500));
  color: #fff;
  font-size: 14px;
  font-weight: 600;
  padding: 9px 22px;
  border-radius: 14px;
  box-shadow: 0 0 18px rgba(0, 213, 255, 0.3), 0 4px 12px rgba(0, 0, 0, 0.3);
  transition: all 0.3s;
  white-space: nowrap;
}
.btn-login:hover {
  box-shadow: 0 0 32px rgba(0, 213, 255, 0.5), 0 6px 16px rgba(0, 0, 0, 0.3);
  transform: translateY(-2px);
}
.btn-login:active {
  transform: translateY(0) scale(0.98);
  box-shadow: 0 0 16px rgba(0, 213, 255, 0.25);
}
.btn-login:focus-visible,
.nav-link:focus-visible,
.menu-toggle:focus-visible,
.menu-close:focus-visible,
.btn-primary:focus-visible,
.back-top:focus-visible {
  outline: 2px solid var(--primary-400);
  outline-offset: 2px;
  border-radius: 6px;
}
.menu-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 40px;
  height: 40px;
  border-radius: 10px;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(255, 255, 255, 0.08);
  align-items: center;
  transition: border-color 0.3s;
}
.menu-toggle:hover { border-color: rgba(0, 213, 255, 0.3); }
.menu-toggle span {
  display: block;
  width: 18px;
  height: 2px;
  border-radius: 2px;
  background: var(--primary-400);
  box-shadow: 0 0 6px rgba(0, 213, 255, 0.4);
}
.mobile-login-btn {
  display: none;
  width: 40px;
  height: 40px;
  border-radius: 12px;
  background: linear-gradient(135deg, var(--primary-500), var(--secondary-500));
  color: #fff;
  align-items: center;
  justify-content: center;
  font-size: 14px;
  font-weight: 600;
  box-shadow: 0 0 16px rgba(0, 213, 255, 0.3);
  transition: all 0.3s;
}
.mobile-login-btn:hover { box-shadow: 0 0 24px rgba(0, 213, 255, 0.45); transform: translateY(-1px); }

/* ===== Mobile Menu ===== */
.mobile-menu {
  position: fixed;
  inset: 0;
  z-index: 200;
  background: rgba(5, 13, 24, 0.97);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  display: flex;
  flex-direction: column;
  padding: 24px;
  transform: translateX(100%);
  transition: transform 0.4s cubic-bezier(0.22, 1, 0.36, 1);
  visibility: hidden;
}
.mobile-menu.open {
  transform: translateX(0);
  visibility: visible;
}
.mobile-menu-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 48px;
}
.menu-close {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.05);
  color: var(--text-100);
  font-size: 22px;
  border: 1px solid rgba(255, 255, 255, 0.1);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.3s;
}
.menu-close:hover { border-color: var(--primary-400); color: var(--primary-400); }
.mobile-nav {
  display: flex;
  flex-direction: column;
  gap: 4px;
}
.mobile-nav a {
  font-size: 24px;
  font-weight: 600;
  color: var(--text-100);
  padding: 14px 8px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
  display: flex;
  align-items: center;
  justify-content: space-between;
  transition: color 0.3s, padding-left 0.3s;
}
.mobile-nav a:hover, .mobile-nav a.active { color: var(--primary-400); padding-left: 14px; }
.mobile-nav a::after {
  content: '→';
  color: var(--primary-400);
  opacity: 0;
  transform: translateX(-8px);
  transition: all 0.3s;
}
.mobile-nav a:hover::after { opacity: 1; transform: translateX(0); }
.mobile-nav .btn-login {
  margin-top: 20px;
  justify-content: center;
  font-size: 16px;
  padding: 14px;
}
.mobile-nav .btn-login::after { display: none; }

/* ===== Breadcrumb ===== */
.breadcrumb {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px;
  font-size: 13px;
  color: var(--text-500);
  margin-bottom: 32px;
}
.breadcrumb a {
  color: var(--text-500);
  transition: color 0.3s;
}
.breadcrumb a:hover { color: var(--primary-400); }
.breadcrumb .sep { opacity: 0.5; }
.breadcrumb .current {
  color: var(--primary-400);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  max-width: 240px;
}

/* ===== Article Hero ===== */
.article-hero {
  padding: 132px 0 56px;
  background:
    linear-gradient(180deg, rgba(5, 13, 24, 0.82) 0%, rgba(9, 20, 40, 0.95) 100%),
    url('/assets/images/backpic/back-1.webp') center / cover no-repeat;
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
  position: relative;
  overflow: hidden;
}
.article-hero .hero-glow {
  position: absolute;
  top: -80px;
  right: -80px;
  width: 360px;
  height: 360px;
  background: radial-gradient(circle, rgba(123, 97, 255, 0.18), transparent 70%);
  pointer-events: none;
}
.article-header {
  max-width: 960px;
  margin: 0 auto;
  text-align: center;
}
.badge {
  display: inline-flex;
  align-items: center;
  padding: 5px 14px;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: 8px;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.12em;
  color: var(--primary-400);
  box-shadow: 0 0 12px rgba(0, 213, 255, 0.08);
  margin-bottom: 20px;
  text-transform: uppercase;
}
.article-header h1 {
  font-size: clamp(26px, 3.5vw, 38px);
  font-weight: 700;
  line-height: 1.25;
  color: var(--text-100);
  margin-bottom: 16px;
  letter-spacing: -0.01em;
}
.article-summary {
  font-size: 16px;
  line-height: 1.7;
  color: var(--text-300);
  max-width: 720px;
  margin: 0 auto 24px;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.article-meta {
  display: flex;
  align-items: center;
  justify-content: center;
  flex-wrap: wrap;
  gap: 10px;
  font-size: 14px;
  color: var(--text-500);
}
.article-meta .dot { opacity: 0.5; }

/* ===== Article Body ===== */
.article-body {
  padding: 48px 0 80px;
  background:
    radial-gradient(800px 400px at 80% -10%, rgba(123, 97, 255, 0.08), transparent 60%),
    radial-gradient(600px 300px at 10% 10%, rgba(0, 213, 255, 0.06), transparent 60%),
    var(--bg-900);
}
.article-main {
  max-width: 720px;
  margin: 0 auto;
  padding: 0 24px;
}
.article-content {
  font-size: 17px;
  line-height: 1.9;
  color: var(--text-300);
  letter-spacing: 0.01em;
  word-break: break-word;
}
.article-content p { margin-bottom: 1.5em; }
.article-content h2 {
  margin-top: 2em;
  margin-bottom: 0.6em;
  font-size: 24px;
  font-weight: 700;
  line-height: 1.3;
  color: var(--text-100);
}
.article-content h3 {
  margin-top: 1.6em;
  margin-bottom: 0.5em;
  font-size: 20px;
  font-weight: 600;
  line-height: 1.4;
  color: var(--text-100);
}
.article-content h4 {
  margin-top: 1.4em;
  margin-bottom: 0.4em;
  font-size: 18px;
  font-weight: 600;
  color: var(--text-100);
}
.article-content img {
  border-radius: 12px;
  margin: 2em auto;
  box-shadow: 0 12px 40px rgba(0, 0, 0, 0.35);
  max-width: 100%;
  height: auto;
}
.article-content a {
  color: var(--primary-400);
  text-decoration: underline;
  text-underline-offset: 4px;
  text-decoration-color: rgba(0, 213, 255, 0.35);
  transition: color 0.3s, text-decoration-color 0.3s;
}
.article-content a:hover {
  color: var(--primary-500);
  text-decoration-color: var(--primary-500);
}
.article-content blockquote {
  position: relative;
  padding: 18px 24px;
  background: linear-gradient(145deg, rgba(255, 255, 255, 0.05), rgba(255, 255, 255, 0.01));
  border-radius: 0 16px 16px 0;
  color: var(--text-300);
  font-style: italic;
  margin: 1.5em -16px;
  overflow: hidden;
}
.article-content blockquote::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 4px;
  background: linear-gradient(180deg, var(--primary-500), var(--secondary-500));
}
.article-content blockquote p:last-child { margin-bottom: 0; }
.article-content ul {
  margin: 1em 0 1.5em;
  padding-left: 0;
}
.article-content ul li {
  position: relative;
  padding-left: 24px;
  margin-bottom: 10px;
}
.article-content ul li::before {
  content: '';
  position: absolute;
  left: 2px;
  top: 12px;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--primary-500), var(--secondary-500));
  box-shadow: 0 0 8px rgba(0, 213, 255, 0.5);
}
.article-content ol {
  margin: 1em 0 1.5em;
  padding-left: 1.4em;
}
.article-content ol li {
  padding-left: 4px;
  margin-bottom: 8px;
}
.article-content li::marker { color: var(--primary-400); }
.article-content pre {
  background: var(--bg-800);
  border: 1px solid rgba(255, 255, 255, 0.06);
  border-radius: 12px;
  padding: 18px 20px;
  overflow-x: auto;
  font-size: 14px;
  line-height: 1.7;
  margin: 1.5em 0;
  color: var(--text-100);
}
.article-content code {
  font-family: 'JetBrains Mono', 'Fira Code', Consolas, monospace;
  background: rgba(255, 255, 255, 0.06);
  border-radius: 6px;
  padding: 2px 6px;
  font-size: 0.9em;
  color: var(--primary-400);
}
.article-content pre code {
  background: none;
  padding: 0;
  color: inherit;
}
.article-content table {
  width: 100%;
  border-collapse: collapse;
  background: var(--bg-800);
  border-radius: 12px;
  overflow: hidden;
  margin: 1.5em 0;
  font-size: 15px;
}
.article-content th {
  background: rgba(255, 255, 255, 0.04);
  color: var(--text-100);
  font-weight: 600;
  text-align: left;
  padding: 12px 16px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}
.article-content td {
  padding: 12px 16px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.04);
  color: var(--text-300);
}
.article-content tr:last-child td { border-bottom: none; }
.article-content hr {
  border: none;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(0, 213, 255, 0.3), transparent);
  margin: 2em 0;
}

/* ===== Article CTA ===== */
.article-cta {
  margin-top: 56px;
  text-align: center;
  padding: 40px 24px;
  background: linear-gradient(145deg, rgba(255, 255, 255, 0.05), rgba(255, 255, 255, 0.01));
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: 24px;
  position: relative;
  overflow: hidden;
}
.article-cta::before {
  content: '';
  position: absolute;
  top: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 200px;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--primary-500), transparent);
}
.article-cta p {
  margin-top: 16px;
  font-size: 14px;
  color: var(--text-500);
}

.btn-primary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 13px 36px;
  font-size: 15px;
  font-weight: 600;
  color: #fff;
  border-radius: 14px;
  background: linear-gradient(135deg, var(--primary-500), var(--secondary-500));
  box-shadow: 0 0 24px rgba(0, 213, 255, 0.35), 0 4px 12px rgba(0, 0, 0, 0.3);
  transition: all 0.3s;
  min-width: 160px;
}
.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 0 40px rgba(0, 213, 255, 0.55), 0 6px 16px rgba(0, 0, 0, 0.3);
}
.btn-primary:active {
  transform: translateY(0) scale(0.98);
  box-shadow: 0 0 16px rgba(0, 213, 255, 0.25);
}

/* ===== Empty State ===== */
.empty-state {
  text-align: center;
  padding: 80px 24px;
  background: linear-gradient(145deg, rgba(255, 255, 255, 0.05), rgba(255, 255, 255, 0.02));
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: 24px;
  max-width: 640px;
  margin: 0 auto;
}
.empty-state .icon {
  width: 52px;
  height: 52px;
  border-radius: 50%;
  margin: 0 auto 20px;
  background: rgba(0, 213, 255, 0.08);
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 0 24px rgba(0, 213, 255, 0.15);
  color: var(--primary-400);
}
.empty-state h1 {
  font-size: 28px;
  font-weight: 700;
  color: var(--text-100);
  margin-bottom: 8px;
}
.empty-state p {
  font-size: 14px;
  color: var(--text-500);
  margin-bottom: 28px;
}

/* ===== Related Section ===== */
.related-section {
  padding: 72px 0 48px;
  background: var(--bg-950);
  border-top: 1px solid rgba(255, 255, 255, 0.04);
}
.section-heading {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 16px;
  margin-bottom: 40px;
}
.overline {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.22em;
  color: var(--primary-400);
  text-transform: uppercase;
  margin-bottom: 12px;
}
.overline::before {
  content: '';
  display: inline-block;
  width: 16px;
  height: 2px;
  background: linear-gradient(90deg, var(--primary-500), var(--secondary-500));
  border-radius: 2px;
}
.section-heading h2 {
  font-size: clamp(24px, 3vw, 32px);
  font-weight: 700;
  color: var(--text-100);
  line-height: 1.3;
}
.related-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.related-card {
  background: linear-gradient(145deg, rgba(255, 255, 255, 0.06) 0%, rgba(255, 255, 255, 0.02) 100%);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: 20px;
  overflow: hidden;
  transition: all 0.3s ease;
  display: flex;
  flex-direction: column;
}
.related-card:hover {
  transform: translateY(-4px);
  border-color: rgba(0, 213, 255, 0.25);
  box-shadow: 0 16px 40px rgba(0, 0, 0, 0.35), 0 0 0 1px rgba(0, 213, 255, 0.15);
}
.related-card .thumb {
  width: 100%;
  height: 140px;
  overflow: hidden;
  position: relative;
}
.related-card .thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.6s ease;
}
.related-card:hover .thumb img { transform: scale(1.05); }
.related-card-body {
  padding: 18px 20px 20px;
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.related-card-body h4 {
  font-size: 16px;
  font-weight: 600;
  color: var(--text-100);
  line-height: 1.4;
  transition: color 0.3s;
}
.related-card:hover .related-card-body h4 { color: var(--primary-400); }
.related-card-body time {
  font-size: 13px;
  color: var(--text-500);
  margin-top: auto;
  display: flex;
  align-items: center;
  gap: 6px;
}

/* ===== Back Link ===== */
.back-link-wrap {
  padding: 0 0 72px;
  text-align: center;
  background: var(--bg-950);
}
.back-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 14px;
  font-weight: 500;
  color: var(--text-300);
  transition: color 0.3s, gap 0.3s;
}
.back-link:hover {
  color: var(--primary-400);
  gap: 12px;
}

/* ===== Footer ===== */
.site-footer {
  background: var(--bg-950);
  border-top: 1px solid rgba(255, 255, 255, 0.06);
  padding: 64px 0 32px;
}
.footer-top {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr 1fr;
  gap: 40px;
  padding-bottom: 48px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
}
.footer-brand .logo {
  font-size: 20px;
  margin-bottom: 16px;
  display: inline-flex;
}
.footer-brand p {
  font-size: 14px;
  line-height: 1.7;
  color: var(--text-500);
  margin-bottom: 20px;
  max-width: 360px;
}
.qr-placeholder {
  width: 104px;
  height: 104px;
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: 16px;
  background: rgba(255, 255, 255, 0.03);
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  font-size: 13px;
  color: var(--text-500);
  line-height: 1.5;
}
.footer-links h4,
.footer-links-sm h4 {
  font-size: 14px;
  font-weight: 600;
  color: var(--text-100);
  margin-bottom: 16px;
}
.footer-links ul,
.footer-links-sm ul {
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.footer-links a,
.footer-links-sm a {
  font-size: 14px;
  color: var(--text-300);
  transition: color 0.3s;
}
.footer-links a:hover,
.footer-links-sm a:hover {
  color: var(--primary-400);
}
.footer-bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 16px;
  padding-top: 32px;
  font-size: 13px;
  color: var(--text-500);
}
.footer-bottom a {
  color: var(--text-500);
  transition: color 0.3s;
}
.footer-bottom a:hover { color: var(--primary-400); }
.back-top {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(255, 255, 255, 0.1);
  color: var(--text-300);
  transition: all 0.3s;
}
.back-top:hover {
  border-color: var(--primary-400);
  color: var(--primary-400);
  box-shadow: 0 0 16px rgba(0, 213, 255, 0.2);
  transform: translateY(-2px);
}

/* ===== Responsive ===== */
@media (max-width: 1023px) {
  .nav-left, .nav-right { gap: 16px; }
  .nav-link { font-size: 14px; }
  .footer-top {
    grid-template-columns: 1fr 1fr;
  }
  .footer-brand { grid-column: 1 / -1; }
  .related-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}
@media (max-width: 767px) {
  .nav-left, .nav-right { display: none; }
  .menu-toggle { display: flex; }
  .mobile-login-btn { display: inline-flex; }
  .logo-center {
    position: static;
    transform: none;
    margin: 0 auto;
  }
  .header-inner {
    height: 64px;
  }
  .article-hero {
    padding: 100px 0 40px;
  }
  .article-heading h1 {
    font-size: 28px;
  }
  .related-grid {
    grid-template-columns: 1fr;
  }
  .breadcrumb .current {
    max-width: 160px;
  }
  .footer-top {
    grid-template-columns: 1fr;
    gap: 28px;
    padding-bottom: 36px;
  }
  .footer-bottom {
    flex-direction: column;
    text-align: center;
    justify-content: center;
  }
  .section-heading {
    flex-direction: column;
    align-items: flex-start;
  }
  .article-content blockquote {
    margin-left: -8px;
    margin-right: -8px;
    padding: 16px 18px;
  }
  .article-cta {
    padding: 32px 20px;
  }
}
@media (max-width: 520px) {
  .container { padding: 0 16px; }
  .article-main { padding: 0 16px; }
  .article-content { font-size: 16px; }
  .article-content table {
    display: block;
    overflow-x: auto;
  }
  .btn-primary {
    width: 100%;
  }
  .article-meta {
    gap: 6px;
    font-size: 13px;
  }
}

/* roulang page: category2 */
/* ===== Design Tokens ===== */
    :root {
      --primary-500: #00D5FF;
      --primary-400: #38E8FF;
      --primary-600: #009FCC;
      --secondary-500: #7B61FF;
      --secondary-400: #9D86FF;
      --bg-950: #050D18;
      --bg-900: #091428;
      --bg-800: #0E1F3D;
      --bg-700: #15294F;
      --text-100: #F2F7FF;
      --text-300: #A9B9D4;
      --text-500: #64748B;
      --glass-bg: linear-gradient(145deg, rgba(255,255,255,0.08) 0%, rgba(255,255,255,0.02) 100%);
      --glass-border: 1px solid rgba(255,255,255,0.08);
      --card-shadow: 0 8px 32px rgba(0,0,0,0.25);
      --radius-xl: 24px;
      --radius-lg: 14px;
      --radius-sm: 8px;
    }

    /* ===== Reset / Base ===== */
    *, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
    html { scroll-behavior: smooth; }
    body {
      font-family: 'Inter', 'PingFang SC', 'Microsoft YaHei', system-ui, -apple-system, sans-serif;
      background-color: var(--bg-900);
      background-image:
        radial-gradient(1200px 600px at 80% -10%, rgba(123,97,255,0.15), transparent 60%),
        radial-gradient(800px 400px at 10% 10%, rgba(0,213,255,0.12), transparent 60%);
      background-attachment: fixed;
      color: var(--text-100);
      line-height: 1.7;
      font-size: 16px;
      -webkit-font-smoothing: antialiased;
    }
    img { max-width: 100%; display: block; }
    a { color: inherit; text-decoration: none; }
    ul, ol { list-style: none; }
    button { font-family: inherit; cursor: pointer; border: none; background: none; color: inherit; }
    input, textarea { font-family: inherit; }

    .container {
      max-width: 1280px;
      margin: 0 auto;
      padding: 0 24px;
    }
    .section { padding-block: clamp(64px, 8vw, 96px); position: relative; }
    .section-sm { padding-block: clamp(40px, 5vw, 64px); }

    /* ===== Typography ===== */
    .overline {
      display: inline-flex;
      align-items: center;
      gap: 10px;
      font-size: 12px;
      font-weight: 700;
      letter-spacing: 0.2em;
      color: var(--primary-400);
      text-transform: uppercase;
      margin-bottom: 14px;
    }
    .overline::before {
      content: '';
      width: 16px;
      height: 2px;
      background: linear-gradient(90deg, var(--primary-500), var(--secondary-500));
      border-radius: 2px;
    }
    .section-head {
      text-align: center;
      margin-bottom: 48px;
    }
    .section-head h2 {
      font-size: clamp(24px, 3vw, 32px);
      font-weight: 700;
      line-height: 1.3;
      color: var(--text-100);
    }
    .section-head p {
      margin-top: 10px;
      font-size: 15px;
      color: var(--text-300);
      max-width: 640px;
      margin-inline: auto;
    }

    /* ===== Header / Nav ===== */
    .site-header {
      position: fixed;
      top: 0;
      left: 0;
      right: 0;
      z-index: 100;
      background: rgba(5, 13, 24, 0.75);
      backdrop-filter: blur(16px);
      -webkit-backdrop-filter: blur(16px);
      border-bottom: 1px solid rgba(255,255,255,0.06);
    }
    .header-inner {
      display: grid;
      grid-template-columns: 1fr auto 1fr;
      align-items: center;
      height: 72px;
    }
    .nav-left, .nav-right {
      display: flex;
      align-items: center;
      gap: 32px;
    }
    .nav-right { justify-content: flex-end; }
    .nav-link {
      font-size: 15px;
      font-weight: 500;
      color: var(--text-300);
      position: relative;
      padding: 6px 2px;
      transition: color 0.3s;
    }
    .nav-link::after {
      content: '';
      position: absolute;
      left: 0;
      bottom: 0;
      width: 100%;
      height: 2px;
      background: linear-gradient(90deg, var(--primary-500), var(--secondary-500));
      border-radius: 2px;
      transform: scaleX(0);
      transform-origin: left;
      transition: transform 0.35s;
      box-shadow: 0 0 10px rgba(0,213,255,0.5);
    }
    .nav-link:hover { color: var(--primary-400); }
    .nav-link:hover::after, .nav-link.active::after { transform: scaleX(1); }
    .nav-link.active { color: var(--primary-400); }

    .logo {
      font-size: 22px;
      font-weight: 800;
      color: var(--text-100);
      display: inline-flex;
      align-items: center;
      gap: 4px;
      letter-spacing: 0.01em;
    }
    .logo-dot {
      width: 6px;
      height: 6px;
      border-radius: 50%;
      background: var(--primary-500);
      box-shadow: 0 0 10px var(--primary-500);
      display: inline-block;
    }
    .nav-login-btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      padding: 8px 22px;
      border-radius: 999px;
      background: linear-gradient(135deg, var(--primary-500), var(--secondary-500));
      color: #fff;
      font-size: 14px;
      font-weight: 600;
      box-shadow: 0 0 18px rgba(0,213,255,0.3), 0 4px 12px rgba(0,0,0,0.25);
      transition: all 0.3s;
    }
    .nav-login-btn:hover {
      box-shadow: 0 0 32px rgba(0,213,255,0.45), 0 6px 18px rgba(0,0,0,0.3);
      transform: translateY(-2px);
      color: #fff;
    }
    .nav-login-btn:active {
      transform: translateY(0) scale(0.97);
      box-shadow: 0 0 14px rgba(0,213,255,0.3);
    }
    .menu-toggle {
      display: none;
      flex-direction: column;
      justify-content: center;
      gap: 5px;
      width: 40px;
      height: 40px;
      padding: 8px;
      border-radius: 8px;
      border: 1px solid rgba(255,255,255,0.12);
      background: rgba(255,255,255,0.04);
      align-items: center;
      transition: background 0.3s;
    }
    .menu-toggle span {
      display: block;
      width: 20px;
      height: 2px;
      border-radius: 2px;
      background: var(--primary-500);
      box-shadow: 0 0 6px rgba(0,213,255,0.4);
      transition: all 0.3s;
    }
    .menu-toggle:hover { background: rgba(255,255,255,0.08); }

    /* Mobile Drawer */
    .drawer {
      position: fixed;
      inset: 0;
      background: rgba(5,13,24,0.97);
      backdrop-filter: blur(20px);
      z-index: 99;
      display: flex;
      flex-direction: column;
      align-items: center;
      justify-content: center;
      gap: 8px;
      opacity: 0;
      pointer-events: none;
      transition: opacity 0.35s;
    }
    .drawer.open { opacity: 1; pointer-events: auto; }
    .drawer a {
      font-size: 24px;
      font-weight: 600;
      color: var(--text-100);
      padding: 12px 20px;
      transition: color 0.3s, transform 0.3s;
      display: inline-flex;
      align-items: center;
      gap: 10px;
    }
    .drawer a:hover { color: var(--primary-400); transform: translateX(6px); }
    .drawer a::after {
      content: '→';
      font-size: 18px;
      color: var(--primary-500);
      opacity: 0;
      transition: opacity 0.3s;
    }
    .drawer a:hover::after { opacity: 1; }
    .drawer .drawer-login {
      margin-top: 18px;
      padding: 14px 44px;
      border-radius: 999px;
      background: linear-gradient(135deg, var(--primary-500), var(--secondary-500));
      color: #fff;
      font-size: 18px;
      font-weight: 600;
      box-shadow: 0 0 24px rgba(0,213,255,0.35);
    }
    .drawer .drawer-close {
      position: absolute;
      top: 20px;
      right: 20px;
      width: 42px;
      height: 42px;
      border-radius: 50%;
      border: 1px solid rgba(255,255,255,0.15);
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 20px;
      color: var(--text-300);
    }

    /* ===== Buttons ===== */
    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 8px;
      padding: 14px 34px;
      border-radius: 999px;
      font-size: 15px;
      font-weight: 600;
      transition: all 0.3s;
      line-height: 1.4;
    }
    .btn-primary {
      background: linear-gradient(135deg, var(--primary-500), var(--secondary-500));
      color: #fff;
      box-shadow: 0 0 24px rgba(0,213,255,0.35), 0 4px 12px rgba(0,0,0,0.3);
    }
    .btn-primary:hover {
      box-shadow: 0 0 40px rgba(0,213,255,0.55), 0 6px 18px rgba(0,0,0,0.35);
      transform: translateY(-2px);
      color: #fff;
    }
    .btn-primary:active {
      transform: translateY(0) scale(0.98);
      box-shadow: 0 0 16px rgba(0,213,255,0.3);
    }
    .btn-primary:focus-visible {
      outline: 3px solid rgba(0,213,255,0.4);
      outline-offset: 3px;
    }
    .btn-ghost {
      border: 1px solid rgba(255,255,255,0.25);
      background: rgba(255,255,255,0.04);
      backdrop-filter: blur(8px);
      color: var(--text-100);
    }
    .btn-ghost:hover {
      border-color: rgba(0,213,255,0.5);
      background: rgba(0,213,255,0.08);
      color: var(--primary-400);
      transform: translateY(-2px);
    }
    .btn-ghost:active { transform: translateY(0) scale(0.98); }
    .btn-ghost:focus-visible {
      outline: 3px solid rgba(0,213,255,0.3);
      outline-offset: 3px;
    }
    .btn-lg { padding: 16px 44px; font-size: 16px; }

    /* ===== Hero ===== */
    .page-hero {
      position: relative;
      padding-top: 160px;
      padding-bottom: 90px;
      background-image: linear-gradient(180deg, rgba(5,13,24,0.75) 0%, rgba(9,20,40,0.9) 100%),
        url('/assets/images/backpic/back-2.png');
      background-size: cover;
      background-position: center;
      border-bottom: 1px solid rgba(255,255,255,0.04);
      text-align: center;
    }
    .page-hero .overline { justify-content: center; }
    .page-hero h1 {
      font-size: clamp(32px, 4.5vw, 48px);
      font-weight: 800;
      line-height: 1.2;
      margin-bottom: 18px;
      background: linear-gradient(135deg, var(--primary-400) 0%, #fff 40%, var(--secondary-400) 100%);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      background-clip: text;
    }
    .page-hero p {
      font-size: 16px;
      color: var(--text-300);
      max-width: 600px;
      margin: 0 auto;
      line-height: 1.7;
    }

    /* ===== Reward Cards ===== */
    .reward-card {
      border-radius: var(--radius-xl);
      background: var(--glass-bg);
      backdrop-filter: blur(14px);
      -webkit-backdrop-filter: blur(14px);
      border: var(--glass-border);
      box-shadow: var(--card-shadow);
      position: relative;
      overflow: hidden;
      transition: transform 0.35s, box-shadow 0.35s;
    }
    .reward-card::before {
      content: '';
      position: absolute;
      inset: 0;
      background: linear-gradient(180deg, rgba(255,255,255,0.08), transparent 40%);
      pointer-events: none;
    }
    .reward-card:hover {
      transform: translateY(-4px);
      box-shadow: 0 16px 40px rgba(0,0,0,0.35), 0 0 0 1px rgba(0,213,255,0.2);
    }
    .reward-card-large {
      height: 100%;
      min-height: 300px;
      display: flex;
      flex-direction: column;
      justify-content: space-between;
      padding: 32px;
    }
    .reward-card-inner { padding: 28px; }
    .reward-card-medium {
      display: flex;
      gap: 20px;
      align-items: center;
      min-height: 156px;
      padding: 22px;
    }
    .reward-card-medium .reward-img {
      width: 100px;
      height: 100px;
      border-radius: 18px;
      object-fit: cover;
      flex-shrink: 0;
      border: 1px solid rgba(255,255,255,0.08);
    }
    .reward-badge {
      display: inline-flex;
      align-items: center;
      padding: 5px 14px;
      border-radius: var(--radius-sm);
      background: rgba(255,255,255,0.06);
      border: 1px solid rgba(255,255,255,0.1);
      font-size: 12px;
      font-weight: 700;
      color: var(--primary-400);
    }
    .reward-value {
      font-size: clamp(42px, 5vw, 64px);
      font-weight: 800;
      line-height: 1.2;
      background: linear-gradient(135deg, var(--primary-400), var(--secondary-400));
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      background-clip: text;
    }

    /* ===== Level List ===== */
    .level-list { display: flex; flex-direction: column; gap: 16px; }
    .level-row {
      display: flex;
      align-items: center;
      gap: 24px;
      padding: 24px 28px;
      border-radius: var(--radius-xl);
      background: var(--glass-bg);
      backdrop-filter: blur(14px);
      border: var(--glass-border);
      box-shadow: var(--card-shadow);
      transition: all 0.3s;
    }
    .level-row:hover {
      transform: translateX(4px);
      box-shadow: 0 12px 32px rgba(0,0,0,0.3), 0 0 0 1px rgba(0,213,255,0.15);
    }
    .level-row.featured {
      border-color: rgba(0,213,255,0.3);
      box-shadow: 0 0 24px rgba(0,213,255,0.12), var(--card-shadow);
    }
    .level-icon {
      width: 52px;
      height: 52px;
      border-radius: 14px;
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 24px;
      flex-shrink: 0;
      background: linear-gradient(135deg, rgba(0,213,255,0.15), rgba(123,97,255,0.15));
      border: 1px solid rgba(0,213,255,0.2);
      color: var(--primary-400);
    }
    .level-info { flex: 1; min-width: 0; }
    .level-info h3 { font-size: 18px; font-weight: 600; color: var(--text-100); }
    .level-info p { font-size: 14px; color: var(--text-300); margin-top: 4px; }
    .level-reward {
      text-align: right;
      flex-shrink: 0;
    }
    .level-reward span { font-size: 13px; color: var(--text-500); display: block; }
    .level-reward strong { font-size: 15px; color: var(--text-100); font-weight: 600; }
    .level-threshold {
      flex-shrink: 0;
      padding: 6px 16px;
      border-radius: 999px;
      border: 1px solid rgba(255,255,255,0.12);
      background: rgba(255,255,255,0.04);
      font-size: 13px;
      color: var(--text-300);
    }

    /* ===== Rules ===== */
    .rules-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 24px;
    }
    .rule-card {
      padding: 28px 24px;
      border-radius: var(--radius-lg);
      background: var(--glass-bg);
      backdrop-filter: blur(12px);
      border: var(--glass-border);
      transition: all 0.3s;
    }
    .rule-card:hover {
      transform: translateY(-4px);
      border-color: rgba(0,213,255,0.2);
      box-shadow: 0 12px 32px rgba(0,0,0,0.25);
    }
    .rule-card .rule-icon {
      width: 42px;
      height: 42px;
      border-radius: 12px;
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 20px;
      background: linear-gradient(135deg, rgba(0,213,255,0.12), rgba(123,97,255,0.12));
      color: var(--primary-400);
      margin-bottom: 16px;
      border: 1px solid rgba(0,213,255,0.15);
    }
    .rule-card h3 { font-size: 16px; font-weight: 600; color: var(--text-100); margin-bottom: 8px; }
    .rule-card p { font-size: 14px; color: var(--text-300); line-height: 1.6; }

    /* ===== FAQ ===== */
    .faq-list { max-width: 800px; margin: 0 auto; display: flex; flex-direction: column; gap: 14px; }
    .faq-item {
      border-radius: var(--radius-lg);
      background: var(--glass-bg);
      backdrop-filter: blur(12px);
      border: 1px solid rgba(255,255,255,0.07);
      overflow: hidden;
      transition: border-color 0.3s;
    }
    .faq-item:hover { border-color: rgba(0,213,255,0.2); }
    .faq-item.open { border-color: rgba(0,213,255,0.25); }
    .faq-question {
      width: 100%;
      display: flex;
      align-items: center;
      justify-content: space-between;
      padding: 22px 26px;
      font-size: 16px;
      font-weight: 600;
      color: var(--text-100);
      text-align: left;
      transition: background 0.3s;
    }
    .faq-question:hover { background: rgba(255,255,255,0.02); }
    .faq-icon {
      width: 28px;
      height: 28px;
      border-radius: 50%;
      border: 1px solid rgba(255,255,255,0.2);
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 18px;
      color: var(--primary-400);
      flex-shrink: 0;
      transition: transform 0.35s;
    }
    .faq-item.open .faq-icon { transform: rotate(45deg); }
    .faq-answer {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.4s ease;
    }
    .faq-answer-inner {
      padding: 0 26px 22px;
      font-size: 15px;
      color: var(--text-300);
      line-height: 1.8;
      border-top: 1px solid rgba(255,255,255,0.04);
      padding-top: 18px;
      margin-top: 2px;
    }

    /* ===== CTA Section ===== */
    .cta-section {
      position: relative;
      padding-block: clamp(72px, 9vw, 110px);
      background-image: linear-gradient(180deg, rgba(5,13,24,0.8) 0%, rgba(9,20,40,0.9) 100%),
        url('/assets/images/backpic/back-1.webp');
      background-size: cover;
      background-position: center;
      background-attachment: fixed;
      text-align: center;
      border-top: 1px solid rgba(255,255,255,0.04);
    }
    .cta-section h2 {
      font-size: clamp(28px, 4vw, 44px);
      font-weight: 800;
      color: var(--text-100);
      margin-bottom: 14px;
    }
    .cta-section p {
      font-size: 15px;
      color: var(--text-300);
      margin-bottom: 36px;
    }
    .cta-actions { display: flex; gap: 18px; justify-content: center; flex-wrap: wrap; }

    /* ===== Footer ===== */
    .site-footer {
      background: var(--bg-950);
      border-top: 1px solid rgba(255,255,255,0.06);
      padding-top: 64px;
    }
    .footer-top {
      display: grid;
      grid-template-columns: 1.4fr 1fr 1fr 1fr 1fr;
      gap: 40px;
      padding-bottom: 48px;
    }
    .footer-brand .logo { font-size: 24px; margin-bottom: 14px; display: inline-flex; }
    .footer-brand p {
      font-size: 14px;
      color: var(--text-300);
      line-height: 1.7;
      margin-top: 14px;
      max-width: 320px;
    }
    .qr-placeholder {
      width: 120px;
      height: 120px;
      margin-top: 20px;
      border-radius: 16px;
      border: 1px solid rgba(255,255,255,0.1);
      background: rgba(255,255,255,0.04);
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 12px;
      color: var(--text-500);
      text-align: center;
      line-height: 1.5;
    }
    .footer-links h4, .footer-links-sm h4 {
      font-size: 14px;
      font-weight: 600;
      color: var(--text-100);
      margin-bottom: 18px;
    }
    .footer-links ul, .footer-links-sm ul { display: flex; flex-direction: column; gap: 10px; }
    .footer-links a, .footer-links-sm a {
      font-size: 14px;
      color: var(--text-300);
      transition: color 0.3s, padding-left 0.3s;
    }
    .footer-links a:hover, .footer-links-sm a:hover {
      color: var(--primary-400);
      padding-left: 4px;
    }
    .footer-bottom {
      border-top: 1px solid rgba(255,255,255,0.05);
      padding-block: 22px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      flex-wrap: wrap;
      gap: 12px;
      font-size: 13px;
      color: var(--text-500);
    }
    .footer-bottom a { color: var(--text-300); transition: color 0.3s; }
    .footer-bottom a:hover { color: var(--primary-400); }
    .back-top {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      width: 38px;
      height: 38px;
      border-radius: 50%;
      border: 1px solid rgba(255,255,255,0.15);
      color: var(--text-300);
      transition: all 0.3s;
    }
    .back-top:hover {
      color: var(--primary-400);
      border-color: rgba(0,213,255,0.4);
      box-shadow: 0 0 16px rgba(0,213,255,0.2);
      transform: translateY(-2px);
    }

    /* ===== Animations ===== */
    @keyframes fadeInUp {
      from { opacity: 0; transform: translateY(16px); }
      to { opacity: 1; transform: translateY(0); }
    }
    .animate-fade-up { animation: fadeInUp 0.5s ease both; }
    .delay-1 { animation-delay: 0.08s; }
    .delay-2 { animation-delay: 0.16s; }
    .delay-3 { animation-delay: 0.24s; }
    .delay-4 { animation-delay: 0.32s; }

    /* ===== Responsive ===== */
    @media (max-width: 1024px) {
      .nav-left, .nav-right { gap: 18px; }
      .nav-link { font-size: 14px; }
      .footer-top { grid-template-columns: 1fr 1fr; gap: 32px; }
      .rules-grid { grid-template-columns: repeat(2, 1fr); }
    }
    @media (max-width: 768px) {
      .header-inner { grid-template-columns: auto 1fr auto; height: 64px; padding: 0 16px; }
      .nav-left, .nav-right { display: none; }
      .menu-toggle { display: flex; }
      .logo { justify-content: center; }
      .header-inner .logo { grid-column: 2; }
      .menu-toggle { grid-column: 1; grid-row: 1; }
      .site-header .nav-login-btn { display: none; }
      .page-hero { padding-top: 130px; padding-bottom: 60px; }
      .page-hero h1 { font-size: clamp(28px, 8vw, 38px); }
      .reward-card-large { padding: 24px; }
      .level-row { flex-direction: column; align-items: flex-start; gap: 14px; padding: 20px; }
      .level-reward { text-align: left; }
      .footer-top { grid-template-columns: 1fr; }
      .rules-grid { grid-template-columns: 1fr; }
      .cta-actions { flex-direction: column; width: 100%; }
      .cta-actions .btn { width: 100%; }
      .footer-bottom { flex-direction: column; text-align: center; }
    }
    @media (max-width: 520px) {
      .reward-card-medium { flex-direction: column; text-align: center; }
      .reward-card-medium .reward-img { margin: 0 auto; }
      .reward-value { font-size: 40px; }
    }

/* roulang page: category3 */
:root {
      --primary: #00D5FF;
      --primary-light: #38E8FF;
      --primary-dark: #009FCC;
      --secondary: #7B61FF;
      --secondary-light: #9D86FF;
      --bg-950: #050D18;
      --bg-900: #091428;
      --bg-800: #0E1F3D;
      --bg-700: #15294F;
      --text-100: #F2F7FF;
      --text-300: #A9B9D4;
      --text-500: #64748B;
      --glass-bg: linear-gradient(145deg, rgba(255,255,255,0.08) 0%, rgba(255,255,255,0.02) 100%);
      --glass-border: rgba(255,255,255,0.08);
      --radius-lg: 24px;
      --radius-md: 14px;
      --radius-sm: 8px;
      --shadow-card: 0 8px 32px rgba(0,0,0,0.25);
      --shadow-glow: 0 0 24px rgba(0,213,255,0.35);
      --shadow-glow-hover: 0 0 40px rgba(0,213,255,0.55);
    }

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

    html {
      scroll-behavior: smooth;
    }

    body {
      font-family: 'Inter', 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', sans-serif;
      background: var(--bg-900);
      color: var(--text-100);
      line-height: 1.7;
      overflow-x: hidden;
    }

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

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

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

    .container {
      width: 100%;
      max-width: 1280px;
      margin: 0 auto;
      padding: 0 24px;
    }

    /* ========== Header / Nav ========== */
    .site-header {
      position: fixed;
      top: 0;
      left: 0;
      right: 0;
      z-index: 100;
      background: rgba(5, 13, 24, 0.75);
      backdrop-filter: blur(16px);
      -webkit-backdrop-filter: blur(16px);
      border-bottom: 1px solid rgba(255, 255, 255, 0.06);
      transition: background 0.3s ease, box-shadow 0.3s ease;
    }

    .site-header.scrolled {
      background: rgba(5, 13, 24, 0.92);
      box-shadow: 0 8px 24px rgba(0, 0, 0, 0.25);
    }

    .nav-link {
      position: relative;
      font-size: 15px;
      font-weight: 500;
      color: var(--text-300);
      padding: 6px 2px;
      transition: color 0.3s ease;
    }

    .nav-link::after {
      content: '';
      position: absolute;
      left: 0;
      right: 0;
      bottom: 0;
      height: 2px;
      border-radius: 2px;
      background: linear-gradient(90deg, var(--primary), var(--secondary));
      transform: scaleX(0);
      transform-origin: left;
      transition: transform 0.3s ease;
      box-shadow: 0 0 10px rgba(0, 213, 255, 0.5);
    }

    .nav-link:hover,
    .nav-link.active {
      color: var(--primary-light);
    }

    .nav-link:hover::after,
    .nav-link.active::after {
      transform: scaleX(1);
    }

    .logo {
      display: inline-flex;
      align-items: center;
      gap: 6px;
      font-size: 22px;
      font-weight: 800;
      letter-spacing: 0.02em;
      color: #fff;
    }

    .logo-dot {
      width: 6px;
      height: 6px;
      border-radius: 50%;
      background: var(--primary);
      box-shadow: 0 0 10px var(--primary);
      animation: pulseDot 2s ease-in-out infinite;
    }

    @keyframes pulseDot {
      0%, 100% { opacity: 1; transform: scale(1); }
      50% { opacity: 0.6; transform: scale(0.8); }
    }

    .btn-login {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      border-radius: var(--radius-md);
      font-size: 14px;
      font-weight: 600;
      color: #fff;
      background: linear-gradient(135deg, var(--primary), var(--secondary));
      box-shadow: var(--shadow-glow);
      border: none;
      transition: all 0.3s ease;
    }

    .btn-login:hover {
      box-shadow: var(--shadow-glow-hover);
      transform: translateY(-2px);
    }

    .btn-login:active {
      transform: translateY(0);
      box-shadow: 0 0 12px rgba(0, 213, 255, 0.3);
    }

    .btn-login:focus-visible {
      outline: 3px solid rgba(0, 213, 255, 0.3);
      outline-offset: 2px;
    }

    .mobile-toggle {
      display: none;
      flex-direction: column;
      justify-content: center;
      gap: 5px;
      width: 40px;
      height: 40px;
      background: transparent;
      border: none;
      border-radius: 8px;
      padding: 8px;
    }

    .mobile-toggle span {
      display: block;
      width: 100%;
      height: 2px;
      background: var(--primary-light);
      border-radius: 2px;
      box-shadow: 0 0 6px rgba(0, 213, 255, 0.4);
      transition: transform 0.3s ease, opacity 0.3s ease;
    }

    .mobile-toggle.open span:nth-child(1) {
      transform: translateY(7px) rotate(45deg);
    }

    .mobile-toggle.open span:nth-child(2) {
      opacity: 0;
    }

    .mobile-toggle.open span:nth-child(3) {
      transform: translateY(-7px) rotate(-45deg);
    }

    .mobile-menu {
      display: none;
      position: fixed;
      inset: 0;
      z-index: 99;
      background: rgba(5, 13, 24, 0.97);
      backdrop-filter: blur(20px);
      -webkit-backdrop-filter: blur(20px);
      padding: 100px 32px 40px;
      flex-direction: column;
      gap: 24px;
    }

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

    .mobile-link {
      font-size: 22px;
      font-weight: 600;
      color: var(--text-100);
      padding: 8px 12px;
      border-left: 2px solid transparent;
      transition: all 0.3s ease;
    }

    .mobile-link:hover,
    .mobile-link.active {
      color: var(--primary-light);
      border-left-color: var(--primary);
      padding-left: 20px;
    }

    .mobile-login {
      margin-top: 16px;
      justify-content: center;
      padding: 14px 24px;
      font-size: 16px;
    }

    /* ========== Buttons ========== */
    .btn-primary {
      position: relative;
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 8px;
      border: none;
      border-radius: var(--radius-md);
      font-weight: 600;
      color: #fff;
      background: linear-gradient(135deg, var(--primary), var(--secondary));
      box-shadow: var(--shadow-glow);
      transition: all 0.3s ease;
      overflow: hidden;
    }

    .btn-primary:hover {
      transform: translateY(-2px);
      box-shadow: var(--shadow-glow-hover);
    }

    .btn-primary:active {
      transform: translateY(0);
      box-shadow: 0 0 12px rgba(0, 213, 255, 0.3);
    }

    .btn-primary:focus-visible {
      outline: 3px solid rgba(0, 213, 255, 0.3);
      outline-offset: 2px;
    }

    .btn-primary::after {
      content: '';
      position: absolute;
      inset: 0;
      border-radius: inherit;
      box-shadow: 0 0 0 0 rgba(0, 213, 255, 0.5);
      opacity: 0;
      pointer-events: none;
    }

    .btn-primary:hover::after {
      animation: rippleEffect 0.8s ease-out forwards;
      opacity: 1;
    }

    @keyframes rippleEffect {
      0% {
        box-shadow: 0 0 0 0 rgba(0, 213, 255, 0.5);
        opacity: 1;
      }
      100% {
        box-shadow: 0 0 0 60px rgba(0, 213, 255, 0);
        opacity: 0;
      }
    }

    .btn-ghost {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 8px;
      border-radius: var(--radius-md);
      font-weight: 600;
      color: var(--text-100);
      background: linear-gradient(145deg, rgba(255, 255, 255, 0.08), rgba(255, 255, 255, 0.02));
      border: 1px solid rgba(255, 255, 255, 0.14);
      backdrop-filter: blur(14px);
      -webkit-backdrop-filter: blur(14px);
      transition: all 0.3s ease;
    }

    .btn-ghost:hover {
      color: var(--primary-light);
      border-color: rgba(0, 213, 255, 0.4);
      box-shadow: 0 0 20px rgba(0, 213, 255, 0.15);
      transform: translateY(-2px);
    }

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

    .btn-ghost:focus-visible {
      outline: 3px solid rgba(0, 213, 255, 0.25);
      outline-offset: 2px;
    }

    /* ========== Hero ========== */
    .hero {
      position: relative;
      min-height: 92vh;
      display: flex;
      align-items: center;
      justify-content: center;
      padding: 120px 0 80px;
      overflow: hidden;
    }

    .hero-bg {
      background-image: url('/assets/images/backpic/back-2.png');
      position: absolute;
      inset: 0;
      background-size: cover;
      background-position: center;
      opacity: 0.5;
    }

    .hero-overlay {
      position: absolute;
      inset: 0;
      background: linear-gradient(180deg, rgba(5, 13, 24, 0.7) 0%, rgba(5, 13, 24, 0.92) 100%);
    }

    .hero-grid {
      position: absolute;
      inset: 0;
      background-image: linear-gradient(rgba(255, 255, 255, 0.03) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255, 255, 255, 0.03) 1px, transparent 1px);
      background-size: 48px 48px;
      opacity: 0.5;
    }

    .hero-content {
      position: relative;
      z-index: 2;
      text-align: center;
      animation: fadeInUp 0.6s ease both;
    }

    @keyframes fadeInUp {
      from {
        opacity: 0;
        transform: translateY(16px);
      }
      to {
        opacity: 1;
        transform: translateY(0);
      }
    }

    .breadcrumb {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      font-size: 13px;
      color: var(--text-500);
      margin-bottom: 20px;
      justify-content: center;
    }

    .breadcrumb a {
      transition: color 0.3s ease;
    }

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

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

    .overline {
      display: inline-flex;
      align-items: center;
      gap: 10px;
      font-size: 12px;
      font-weight: 700;
      letter-spacing: 0.2em;
      color: var(--primary-light);
      margin-bottom: 16px;
      text-transform: uppercase;
    }

    .overline::before {
      content: '';
      width: 16px;
      height: 2px;
      background: linear-gradient(90deg, var(--primary), var(--secondary));
      border-radius: 2px;
      flex-shrink: 0;
    }

    .text-gradient {
      background: linear-gradient(135deg, var(--primary), var(--secondary));
      -webkit-background-clip: text;
      background-clip: text;
      -webkit-text-fill-color: transparent;
      color: transparent;
    }

    .hero-sub {
      font-size: 17px;
      color: var(--text-300);
      max-width: 640px;
      margin: 0 auto 32px;
      line-height: 1.8;
    }

    .hero-stats {
      display: inline-flex;
      gap: 48px;
      padding: 20px 40px;
      background: rgba(255, 255, 255, 0.04);
      border: 1px solid rgba(255, 255, 255, 0.08);
      border-radius: var(--radius-lg);
      backdrop-filter: blur(14px);
      -webkit-backdrop-filter: blur(14px);
      box-shadow: var(--shadow-card);
    }

    .stat-item {
      display: flex;
      flex-direction: column;
      gap: 4px;
      text-align: left;
    }

    .stat-item strong {
      font-size: 24px;
      font-weight: 800;
      color: var(--primary-light);
      line-height: 1.3;
    }

    .stat-item span {
      font-size: 13px;
      color: var(--text-500);
      white-space: nowrap;
    }

    /* ========== Anchor Pills ========== */
    .anchor-section {
      padding: 40px 0 8px;
      position: relative;
      z-index: 3;
    }

    .pill {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      padding: 10px 22px;
      font-size: 14px;
      font-weight: 500;
      color: var(--text-300);
      background: rgba(255, 255, 255, 0.04);
      border: 1px solid rgba(255, 255, 255, 0.1);
      border-radius: 999px;
      backdrop-filter: blur(10px);
      -webkit-backdrop-filter: blur(10px);
      transition: all 0.3s ease;
    }

    .pill:hover {
      color: var(--primary-light);
      border-color: rgba(0, 213, 255, 0.4);
      box-shadow: 0 0 16px rgba(0, 213, 255, 0.15);
      transform: translateY(-2px);
    }

    /* ========== FAQ ========== */
    .section-head {
      text-align: center;
      margin-bottom: 48px;
    }

    .section-head h2 {
      font-size: clamp(26px, 3vw, 34px);
      font-weight: 700;
      margin-bottom: 12px;
      color: var(--text-100);
    }

    .section-head p {
      color: var(--text-300);
      max-width: 560px;
      margin: 0 auto;
      font-size: 15px;
    }

    .faq-item {
      background: var(--glass-bg);
      border: 1px solid var(--glass-border);
      border-radius: var(--radius-lg);
      overflow: hidden;
      backdrop-filter: blur(14px);
      -webkit-backdrop-filter: blur(14px);
      transition: border-color 0.3s ease, box-shadow 0.3s ease, transform 0.3s ease;
    }

    .faq-item:hover {
      border-color: rgba(0, 213, 255, 0.2);
      box-shadow: 0 12px 32px rgba(0, 0, 0, 0.25);
    }

    .faq-item.open {
      border-color: rgba(0, 213, 255, 0.3);
      box-shadow: 0 0 0 1px rgba(0, 213, 255, 0.15), 0 16px 40px rgba(0, 0, 0, 0.3);
    }

    .faq-trigger {
      background: transparent;
      border: none;
      width: 100%;
      text-align: left;
    }

    .faq-title-text {
      font-size: 16px;
      font-weight: 600;
      color: var(--text-100);
      flex: 1;
      line-height: 1.5;
      transition: color 0.3s ease;
    }

    .faq-trigger:hover .faq-title-text {
      color: var(--primary-light);
    }

    .faq-icon {
      position: relative;
      width: 24px;
      height: 24px;
      flex-shrink: 0;
    }

    .faq-icon::before,
    .faq-icon::after {
      content: '';
      position: absolute;
      top: 50%;
      left: 50%;
      width: 14px;
      height: 2px;
      background: var(--primary-light);
      border-radius: 2px;
      transform: translate(-50%, -50%);
      transition: transform 0.3s ease;
    }

    .faq-icon::after {
      transform: translate(-50%, -50%) rotate(90deg);
    }

    .faq-item.open .faq-icon::after {
      transform: translate(-50%, -50%) rotate(0deg);
    }

    .faq-answer {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.45s ease, padding 0.35s ease;
      padding: 0 28px;
    }

    .faq-item.open .faq-answer {
      max-height: 600px;
      padding: 0 28px 24px;
    }

    .faq-answer p {
      font-size: 15px;
      line-height: 1.8;
      color: var(--text-300);
      border-left: 2px solid var(--primary);
      border-image: linear-gradient(180deg, var(--primary), var(--secondary)) 1;
      padding-left: 16px;
    }

    .badge {
      display: inline-flex;
      align-items: center;
      padding: 4px 12px;
      font-size: 12px;
      font-weight: 600;
      color: var(--primary-light);
      background: rgba(0, 213, 255, 0.08);
      border: 1px solid rgba(0, 213, 255, 0.18);
      border-radius: var(--radius-sm);
      white-space: nowrap;
      flex-shrink: 0;
    }

    /* ========== Support Card ========== */
    .support-card {
      border-radius: var(--radius-lg);
      background: var(--glass-bg);
      border: 1px solid var(--glass-border);
      backdrop-filter: blur(14px);
      -webkit-backdrop-filter: blur(14px);
      box-shadow: var(--shadow-card);
      transition: border-color 0.3s ease, box-shadow 0.3s ease;
    }

    .support-card:hover {
      border-color: rgba(0, 213, 255, 0.2);
      box-shadow: 0 16px 40px rgba(0, 0, 0, 0.3), 0 0 0 1px rgba(0, 213, 255, 0.1);
    }

    .support-img {
      border-radius: var(--radius-md);
      overflow: hidden;
      flex-shrink: 0;
    }

    .support-img img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      transition: transform 0.6s ease;
    }

    .support-card:hover .support-img img {
      transform: scale(1.05);
    }

    /* ========== CTA ========== */
    .cta-section {
      position: relative;
      padding: 100px 0;
      background-image: url('/assets/images/backpic/back-1.webp');
      background-size: cover;
      background-position: center;
      background-attachment: fixed;
      overflow: hidden;
    }

    .cta-overlay {
      position: absolute;
      inset: 0;
      background: rgba(5, 13, 24, 0.86);
    }

    .cta-content {
      position: relative;
      z-index: 2;
      text-align: center;
      max-width: 720px;
    }

    .cta-content h2 {
      font-size: clamp(28px, 4vw, 40px);
      font-weight: 700;
      margin-bottom: 16px;
      color: var(--text-100);
    }

    .cta-content p {
      color: var(--text-300);
      margin-bottom: 32px;
      font-size: 15px;
    }

    /* ========== Footer ========== */
    .site-footer {
      background: var(--bg-950);
      padding: 64px 0 24px;
      border-top: 1px solid rgba(255, 255, 255, 0.04);
    }

    .footer-top {
      display: grid;
      grid-template-columns: 2fr 1fr 1fr 1fr 1fr;
      gap: 40px;
      padding-bottom: 48px;
    }

    .footer-brand p {
      font-size: 14px;
      color: var(--text-500);
      margin-top: 16px;
      max-width: 320px;
      line-height: 1.7;
    }

    .qr-placeholder {
      width: 96px;
      height: 96px;
      margin-top: 20px;
      border-radius: 12px;
      border: 1px dashed rgba(255, 255, 255, 0.2);
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 12px;
      color: var(--text-500);
      text-align: center;
      background: rgba(255, 255, 255, 0.02);
      line-height: 1.5;
    }

    .footer-links h4,
    .footer-links-sm h4 {
      font-size: 14px;
      font-weight: 600;
      color: var(--text-100);
      margin-bottom: 16px;
    }

    .footer-links ul,
    .footer-links-sm ul {
      list-style: none;
      display: flex;
      flex-direction: column;
      gap: 10px;
    }

    .footer-links a,
    .footer-links-sm a {
      font-size: 14px;
      color: var(--text-500);
      transition: color 0.3s ease, padding-left 0.3s ease;
    }

    .footer-links a:hover,
    .footer-links-sm a:hover {
      color: var(--primary-light);
      padding-left: 4px;
    }

    .footer-bottom {
      display: flex;
      align-items: center;
      justify-content: space-between;
      padding-top: 24px;
      border-top: 1px solid rgba(255, 255, 255, 0.04);
      font-size: 13px;
      color: var(--text-500);
    }

    .footer-bottom a {
      color: var(--text-500);
      transition: color 0.3s ease;
    }

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

    .back-top {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      width: 36px;
      height: 36px;
      border-radius: 10px;
      background: rgba(255, 255, 255, 0.04);
      border: 1px solid rgba(255, 255, 255, 0.1);
      color: var(--text-300);
      transition: all 0.3s ease;
    }

    .back-top:hover {
      border-color: var(--primary);
      color: var(--primary-light);
      box-shadow: 0 0 16px rgba(0, 213, 255, 0.2);
      transform: translateY(-2px);
    }

    /* ========== Responsive ========== */
    @media (max-width: 1024px) {
      .nav-left,
      .nav-right {
        gap: 20px;
      }
      .nav-link {
        font-size: 14px;
      }
      .footer-top {
        grid-template-columns: 1fr 1fr 1fr;
      }
    }

    @media (max-width: 768px) {
      .nav-left,
      .nav-right {
        display: none;
      }
      .mobile-toggle {
        display: flex;
      }
      .header-inner {
        justify-content: space-between;
      }
      .logo {
        font-size: 20px;
      }
      .hero {
        min-height: auto;
        padding: 120px 0 60px;
      }
      .hero-stats {
        gap: 24px;
        padding: 16px 24px;
        flex-wrap: wrap;
        justify-content: center;
      }
      .support-card {
        flex-direction: column;
        padding: 24px;
      }
      .support-img {
        width: 100%;
        height: 180px;
      }
      .footer-top {
        grid-template-columns: 1fr 1fr;
        gap: 32px;
      }
      .footer-bottom {
        flex-direction: column;
        gap: 12px;
        text-align: center;
      }
      .cta-section {
        background-attachment: scroll;
      }
    }

    @media (max-width: 520px) {
      .hero h1 {
        font-size: 30px;
      }
      .hero-sub {
        font-size: 15px;
      }
      .footer-top {
        grid-template-columns: 1fr;
      }
      .faq-trigger {
        padding: 20px;
      }
      .faq-title-text {
        font-size: 15px;
      }
      .faq-answer {
        padding: 0 20px;
      }
      .faq-item.open .faq-answer {
        padding: 0 20px 20px;
      }
      .anchor-pills {
        flex-wrap: nowrap;
        overflow-x: auto;
        justify-content: flex-start;
        padding-bottom: 8px;
        -webkit-overflow-scrolling: touch;
      }
      .pill {
        flex-shrink: 0;
      }
      .hero-stats {
        gap: 16px;
        padding: 14px 16px;
      }
      .stat-item strong {
        font-size: 18px;
      }
    }