/* roulang page: index */
:root {
    --bg-deep: #060B18;
    --bg-panel: #0B1328;
    --bg-alt: #081020;
    --primary: #2F6BFF;
    --primary-soft: #4c7fff;
    --accent: #6CDEFF;
    --text-main: #F2F7FF;
    --text-sub: #AEBFE0;
    --text-muted: #7388AC;
    --card: rgba(255, 255, 255, 0.055);
    --card-hover: rgba(255, 255, 255, 0.095);
    --border: rgba(255, 255, 255, 0.1);
    --border-top: rgba(255, 255, 255, 0.28);
    --radius-lg: 28px;
    --radius-md: 18px;
    --radius-sm: 10px;
    --shadow-main: 0 18px 40px -28px rgba(5, 10, 30, 0.9);
    --shadow-hover: 0 24px 60px -28px rgba(5, 10, 30, 0.9), 0 0 40px rgba(48, 131, 255, 0.22);
  }

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

  html {
    scroll-behavior: smooth;
  }

  body {
    margin: 0;
    background:
      radial-gradient(circle at 20% 0%, rgba(47, 107, 255, 0.10), transparent 330px),
      radial-gradient(circle at 90% 20%, rgba(108, 222, 255, 0.08), transparent 300px),
      var(--bg-deep);
    color: var(--text-main);
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans CJK SC", sans-serif;
    line-height: 1.8;
    overflow-x: hidden;
    min-height: 100vh;
  }

  body::before {
    content: "";
    position: fixed;
    inset: 0;
    background-image: radial-gradient(rgba(108, 222, 255, 0.14) 1px, transparent 1px);
    background-size: 28px 28px;
    -webkit-mask-image: linear-gradient(to bottom, black, transparent 85%);
    mask-image: linear-gradient(to bottom, black, transparent 85%);
    opacity: 0.32;
    pointer-events: none;
    z-index: 0;
  }

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

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

  button,
  input,
  textarea {
    font: inherit;
  }

  a:focus-visible,
  button:focus-visible,
  summary:focus-visible,
  input:focus-visible {
    outline: 2px solid var(--accent);
    outline-offset: 3px;
    border-radius: 6px;
  }

  .container {
    width: 100%;
    max-width: 1280px;
    margin: 0 auto;
    padding-left: 32px;
    padding-right: 32px;
  }

  .site-header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 50;
    width: 100%;
    height: 72px;
    background: rgba(6, 11, 24, 0.72);
    -webkit-backdrop-filter: blur(16px);
    backdrop-filter: blur(16px);
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    box-shadow: 0 8px 28px -20px rgba(5, 10, 30, 0.9);
  }

  .site-header-bar {
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 24px;
  }

  .brand {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    flex-shrink: 0;
  }

  .brand-mark {
    width: 38px;
    height: 38px;
    border-radius: 10px;
    background: linear-gradient(135deg, rgba(47, 107, 255, 0.95), rgba(47, 151, 255, 0.75));
    display: inline-flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 0 20px rgba(47, 107, 255, 0.35);
  }

  .brand-text {
    font-size: 20px;
    font-weight: 800;
    letter-spacing: 0.02em;
    color: var(--text-main);
    line-height: 1.2;
    display: flex;
    flex-direction: column;
  }

  .brand-text small {
    font-size: 11px;
    font-weight: 600;
    letter-spacing: .2em;
    color: var(--accent);
    text-transform: uppercase;
  }

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

  .nav-link {
    position: relative;
    display: inline-block;
    padding: 10px 18px;
    font-size: 15px;
    font-weight: 500;
    color: var(--text-sub);
    border-radius: 8px;
    transition: color .25s ease, background .25s ease, transform .25s ease;
  }

  .nav-link:hover {
    color: var(--text-main);
    background: rgba(255, 255, 255, 0.04);
    transform: translateY(-1px);
  }

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

  .nav-link.active::after {
    content: "";
    position: absolute;
    left: 18px;
    right: 18px;
    bottom: 2px;
    height: 2px;
    background: linear-gradient(90deg, var(--accent), rgba(108, 222, 255, 0));
    border-radius: 20px;
  }

  .btn-primary {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    border-radius: var(--radius-sm);
    padding: 12px 22px;
    background: linear-gradient(135deg, var(--primary), #2290ff 50%, var(--accent));
    color: #fff;
    font-weight: 700;
    font-size: 15px;
    line-height: 1;
    white-space: nowrap;
    border: 1px solid rgba(255, 255, 255, 0.1);
    box-shadow: 0 12px 30px -10px rgba(47, 107, 255, 0.7), inset 0 1px 0 rgba(255, 255, 255, 0.25);
    transition: all .28s ease;
  }

  .btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 18px 38px -12px rgba(47, 107, 255, 0.8), inset 0 1px 0 rgba(255, 255, 255, 0.3);
    color: #fff;
  }

  .btn-secondary {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    border-radius: var(--radius-sm);
    padding: 12px 22px;
    background: rgba(255, 255, 255, 0.05);
    color: var(--text-main);
    border: 1px solid rgba(255, 255, 255, 0.14);
    border-top-color: rgba(255, 255, 255, 0.3);
    backdrop-filter: blur(8px);
    font-weight: 600;
    font-size: 15px;
    line-height: 1;
    transition: all .25s ease;
  }

  .btn-secondary:hover {
    background: rgba(255, 255, 255, 0.1);
    border-color: rgba(255, 255, 255, 0.25);
    transform: translateY(-1px);
    color: var(--text-main);
  }

  .desktop-cta {
    flex-shrink: 0;
  }

  .hero-block {
    position: relative;
    min-height: 92vh;
    padding: 132px 0 80px;
    display: flex;
    align-items: center;
    overflow: hidden;
  }

  .hero-bg {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    user-select: none;
  }

  .hero-mask {
    position: absolute;
    inset: 0;
    background: linear-gradient(100deg, rgba(6, 11, 24, 0.94) 0%, rgba(6, 11, 24, 0.82) 42%, rgba(9, 20, 42, 0.45) 100%);
  }

  .hero-grid {
    position: relative;
    display: grid;
    grid-template-columns: 1.08fr 0.92fr;
    gap: 56px;
    align-items: center;
  }

  .eyebrow {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    font-size: 13px;
    font-weight: 700;
    letter-spacing: .1em;
    color: var(--accent);
    background: rgba(108, 222, 255, 0.08);
    border: 1px solid rgba(108, 222, 255, 0.18);
    padding: 6px 14px;
    border-radius: 30px;
  }

  .eyebrow::before {
    content: "";
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: var(--accent);
    box-shadow: 0 0 12px var(--accent);
  }

  .hero-title {
    margin: 24px 0 18px;
    font-size: clamp(38px, 5.2vw, 62px);
    font-weight: 800;
    line-height: 1.14;
    letter-spacing: -0.02em;
  }

  .hero-title em {
    font-style: normal;
    background: linear-gradient(90deg, var(--accent), #fff);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
  }

  .hero-sub {
    font-size: 17px;
    line-height: 1.85;
    color: var(--text-sub);
    max-width: 620px;
    margin: 0 0 34px;
  }

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

  .glass-card {
    position: relative;
    border-radius: var(--radius-lg);
    background: linear-gradient(180deg, rgba(255, 255, 255, 0.09), rgba(255, 255, 255, 0.035));
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-top-color: rgba(255, 255, 255, 0.32);
    box-shadow: var(--shadow-main);
    backdrop-filter: blur(12px);
  }

  .console-card {
    padding: 22px;
  }

  .console-head {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 22px;
  }

  .console-dots {
    display: flex;
    gap: 6px;
  }

  .console-dots span {
    width: 10px;
    height: 10px;
    border-radius: 50%;
  }

  .console-dots span:nth-child(1) { background: #FF6F91; }
  .console-dots span:nth-child(2) { background: #FFB454; }
  .console-dots span:nth-child(3) { background: #35E0A1; }

  .badge {
    display: inline-flex;
    align-items: center;
    gap: 5px;
    font-size: 12px;
    font-weight: 600;
    line-height: 1;
    padding: 6px 10px;
    border-radius: 30px;
    color: var(--accent);
    background: rgba(108, 222, 255, 0.1);
    border: 1px solid rgba(108, 222, 255, 0.2);
    white-space: nowrap;
  }

  .console-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 13px 0;
    border-top: 1px solid rgba(255, 255, 255, 0.08);
    color: var(--text-sub);
    font-size: 14px;
  }

  .console-row strong {
    color: var(--text-main);
    font-weight: 600;
  }

  .console-meter {
    margin-top: 16px;
    padding: 16px;
    border-radius: 14px;
    background: rgba(47, 107, 255, 0.12);
    border: 1px solid rgba(47, 107, 255, 0.2);
  }

  .console-meter .meter-label {
    display: flex;
    justify-content: space-between;
    font-size: 13px;
    color: var(--text-sub);
    margin-bottom: 10px;
  }

  .meter-line {
    height: 7px;
    border-radius: 10px;
    background: rgba(255, 255, 255, 0.12);
    overflow: hidden;
  }

  .meter-line i {
    display: block;
    height: 100%;
    width: 86%;
    background: linear-gradient(90deg, var(--primary), var(--accent));
    border-radius: 10px;
    box-shadow: 0 0 12px rgba(108, 222, 255, 0.45);
  }

  .console-cta {
    display: block;
    margin-top: 20px;
    text-align: center;
    border-radius: 12px;
    padding: 13px 16px;
    background: rgba(255, 255, 255, 0.08);
    border: 1px solid rgba(255, 255, 255, 0.12);
    color: var(--text-main);
    font-size: 15px;
    font-weight: 700;
    transition: all .25s ease;
  }

  .console-cta:hover {
    background: rgba(108, 222, 255, 0.12);
    color: var(--accent);
    border-color: rgba(108, 222, 255, 0.3);
  }

  .section-pad {
    padding-top: 90px;
    padding-bottom: 90px;
    position: relative;
  }

  .section-alt {
    background: rgba(8, 16, 32, 0.68);
  }

  .section-sub {
    color: var(--text-sub);
  }

  .section-title {
    font-size: 40px;
    line-height: 1.2;
    font-weight: 800;
    letter-spacing: -0.01em;
    margin: 14px 0 18px;
  }

  .section-lead {
    color: var(--text-sub);
    font-size: 16px;
    max-width: 820px;
    line-height: 1.9;
  }

  .pain-card {
    border-radius: var(--radius-md);
    padding: 28px 26px;
    min-height: 168px;
    background: rgba(255, 255, 255, 0.04);
    border: 1px solid rgba(255, 255, 255, 0.09);
    transition: all .28s ease;
  }

  .pain-card:hover {
    background: var(--card-hover);
    transform: translateY(-4px);
    border-color: rgba(108, 222, 255, 0.2);
    box-shadow: var(--shadow-hover);
  }

  .pain-card .pain-index {
    font-size: 13px;
    font-weight: 800;
    letter-spacing: .16em;
    color: var(--accent);
    margin-bottom: 20px;
  }

  .pain-card h3 {
    font-size: 19px;
    line-height: 1.4;
    margin: 0;
  }

  .feature-panel {
    border-radius: var(--radius-lg);
    padding: 34px;
    height: 100%;
    background: linear-gradient(180deg, rgba(255, 255, 255, 0.07), rgba(255, 255, 255, 0.02));
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-top-color: rgba(255, 255, 255, 0.3);
    box-shadow: var(--shadow-main);
    transition: transform .3s ease, box-shadow .3s ease;
  }

  .feature-panel:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-hover);
  }

  .feature-panel h3 {
    font-size: 23px;
    font-weight: 750;
    margin: 22px 0 12px;
  }

  .feature-panel p {
    color: var(--text-sub);
  }

  .flow-list {
    list-style: none;
    padding: 0;
    margin: 0;
  }

  .flow-list li {
    display: flex;
    gap: 14px;
    padding: 15px 0;
    border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  }

  .flow-list li:last-child {
    border-bottom: none;
  }

  .flow-num {
    font-size: 12px;
    font-weight: 800;
    color: var(--bg-deep);
    background: var(--accent);
    min-width: 28px;
    height: 28px;
    border-radius: 50%;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    transform: translateY(3px);
  }

  .news-card,
  .news-row {
    transition: all .25s ease;
  }

  .news-feature-title:hover {
    color: var(--accent);
  }

  .news-empty {
    grid-column: 1 / -1;
    border: 1px dashed rgba(255, 255, 255, 0.18);
    border-radius: 20px;
    background: rgba(255, 255, 255, 0.03);
    padding: 46px 30px;
    text-align: center;
    color: var(--text-sub);
  }

  .stat-panel {
    border-radius: var(--radius-lg);
    padding: 60px 0;
    overflow: hidden;
    position: relative;
    background: transparent;
  }

  .stat-panel-bg {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    opacity: .36;
  }

  .stat-overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(100deg, rgba(6,11,24,0.85), rgba(9,22,46,0.72));
  }

  .stat-panel .container,
  .stat-panel .inner-content {
    position: relative;
  }

  .stat-card .stat-num {
    font-size: 48px;
    font-weight: 800;
    letter-spacing: -0.03em;
    line-height: 1;
    background: linear-gradient(135deg, #fff, var(--accent));
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
  }

  .stat-card .stat-label {
    margin-top: 12px;
    color: var(--text-sub);
    font-size: 15px;
  }

  .quote-card {
    border-radius: var(--radius-lg);
    padding: 34px;
    height: 100%;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    gap: 28px;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.1);
    transition: all .3s ease;
  }

  .quote-card:hover {
    background: var(--card-hover);
    transform: translateY(-4px);
    border-color: rgba(108, 222, 255, 0.18);
  }

  .quote-card blockquote {
    margin: 0;
    font-size: 16px;
    color: #D7E4FA;
    line-height: 1.85;
  }

  .quote-author {
    display: flex;
    align-items: center;
    gap: 12px;
    padding-top: 20px;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
  }

  .avatar {
    width: 42px;
    height: 42px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--primary), var(--accent));
    color: #fff;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 16px;
  }

  .faq-item {
    border-radius: 16px;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.1);
    margin-bottom: 12px;
    transition: all .25s ease;
  }

  .faq-item:hover {
    background: rgba(255, 255, 255, 0.07);
    border-color: rgba(108, 222, 255, 0.2);
  }

  .faq-item summary {
    list-style: none;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 24px;
    cursor: pointer;
    padding: 22px 26px;
    font-weight: 650;
    font-size: 17px;
    line-height: 1.5;
  }

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

  .faq-item summary::after {
    content: "+";
    font-size: 26px;
    line-height: 1;
    color: var(--accent);
    transition: transform .25s ease;
    font-weight: 400;
    flex-shrink: 0;
  }

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

  .faq-item .faq-body {
    padding: 0 26px 24px;
    color: var(--text-sub);
  }

  .cta-panel {
    position: relative;
    overflow: hidden;
    border-radius: calc(var(--radius-lg) + 6px);
    background: linear-gradient(135deg, rgba(47, 107, 255, 0.18), rgba(108, 222, 255, 0.09)), rgba(255, 255, 255, 0.04);
    border: 1px solid rgba(108, 222, 255, 0.2);
    box-shadow: 0 30px 80px -40px rgba(47, 107, 255, 0.32);
    backdrop-filter: blur(14px);
    padding: 58px 48px;
    text-align: center;
  }

  .cta-panel h2 {
    font-size: 38px;
    margin: 0 0 16px;
  }

  .cta-panel p {
    color: var(--text-sub);
    margin: 0 auto 30px;
    max-width: 660px;
  }

  .mobile-tabbar {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    z-index: 60;
    height: calc(64px + env(safe-area-inset-bottom, 0px));
    padding-bottom: env(safe-area-inset-bottom, 0px);
    background: rgba(5, 8, 18, 0.8);
    -webkit-backdrop-filter: blur(18px);
    backdrop-filter: blur(18px);
    border-top: 1px solid rgba(255, 255, 255, 0.12);
    display: flex;
    align-items: stretch;
    justify-content: space-around;
  }

  .mob-tab {
    flex: 1;
    height: 100%;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 3px;
    font-size: 12px;
    color: var(--text-muted);
    position: relative;
    transition: color .2s ease;
  }

  .mob-tab svg {
    width: 21px;
    height: 21px;
    stroke-width: 1.9;
  }

  .mob-tab.active {
    color: var(--accent);
  }

  .mob-tab.active::after {
    content: "";
    position: absolute;
    top: -1px;
    width: 22px;
    height: 2px;
    border-radius: 10px;
    background: var(--accent);
    box-shadow: 0 0 12px var(--accent);
  }

  .footer {
    background: #050812;
    border-top: 1px solid transparent;
    border-image: linear-gradient(90deg, rgba(255,255,255,0), rgba(108,222,255,0.35), rgba(255,255,255,0)) 1;
    padding: 64px 0 42px;
    position: relative;
  }

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

  .footer .foot-col-title {
    color: var(--text-main);
    font-weight: 700;
    margin-bottom: 16px;
    font-size: 16px;
  }

  .footer .foot-link {
    display: block;
    color: var(--text-sub);
    font-size: 14px;
    padding: 6px 0;
    transition: color .2s ease, padding-left .2s ease;
  }

  .footer .foot-link:hover {
    color: var(--accent);
    padding-left: 4px;
  }

  .copyright-line {
    margin-top: 46px;
    padding-top: 22px;
    border-top: 1px solid rgba(255, 255, 255, 0.08);
    font-size: 14px;
    color: var(--text-muted);
    display: flex;
    flex-wrap: wrap;
    justify-content: space-between;
    gap: 8px;
  }

  @media (min-width: 1025px) {
    .mobile-tabbar {
      display: none;
    }
  }

  @media (max-width: 1024px) {
    .desktop-nav,
    .desktop-cta,
    .brand-text small {
      display: none;
    }

    .site-header {
      height: 64px;
    }

    .site-header-bar {
      justify-content: center;
    }

    .hero-block {
      min-height: auto;
      padding-top: 100px;
      padding-bottom: 70px;
    }

    .hero-grid {
      grid-template-columns: 1fr;
      gap: 40px;
    }

    .hero-sub {
      max-width: 100%;
    }

    .mobile-tabbar {
      display: flex;
    }

    main,
    .main-content {
      padding-bottom: calc(64px + env(safe-area-inset-bottom, 0px));
    }

    .section-pad {
      padding-top: 64px;
      padding-bottom: 64px;
    }

    .section-title {
      font-size: 34px;
    }

    .stat-panel {
      padding: 40px 0;
    }

    .stat-card .stat-num {
      font-size: 40px;
    }
  }

  @media (max-width: 768px) {
    .container {
      padding-left: 20px;
      padding-right: 20px;
    }

    .hero-grid {
      gap: 32px;
    }

    .hero-title {
      font-size: clamp(31px, 8vw, 42px);
      line-height: 1.25;
    }

    .hero-sub {
      font-size: 15px;
    }

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

    .btn-primary,
    .btn-secondary {
      justify-content: center;
      width: 100%;
    }

    .console-card {
      padding: 20px 16px;
    }

    .feature-panel {
      padding: 26px 22px;
    }

    .quote-card {
      padding: 26px 22px;
    }

    .cta-panel {
      padding: 40px 22px;
    }

    .cta-panel h2 {
      font-size: 28px;
    }

    .stat-panel {
      padding: 30px 0;
    }

    .stat-card .stat-num {
      font-size: 34px;
    }

    .stat-card .stat-label {
      font-size: 14px;
    }

    .section-title {
      font-size: 31px;
      line-height: 1.3;
    }

    .section-lead {
      font-size: 15px;
    }

    .site-header {
      background: rgba(6, 11, 24, 0.86);
    }
  }

  @media (max-width: 520px) {
    .brand-text {
      font-size: 18px;
    }

    .mob-tab {
      font-size: 11px;
    }

    .section-pad {
      padding-top: 52px;
      padding-bottom: 52px;
    }

    .pain-card {
      padding: 24px 20px;
      min-height: 0;
    }
  }

/* roulang page: category1 */
:root {
    --bg-deep: #060B18;
    --bg-panel: #0B1328;
    --cobalt: #2F6BFF;
    --cyan: #6CDEFF;
    --text-main: #F2F7FF;
    --text-sub: #AEBFE0;
    --text-muted: #7388AC;
    --glass: rgba(255, 255, 255, 0.055);
    --glass-hover: rgba(255, 255, 255, 0.095);
    --border-glass: rgba(255, 255, 255, 0.1);
    --border-light: rgba(255, 255, 255, 0.22);
    --radius-lg: 20px;
  }

  * {
    box-sizing: border-box;
  }

  html {
    scroll-behavior: smooth;
  }

  body {
    margin: 0;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
      "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans CJK SC", sans-serif;
    background-color: var(--bg-deep);
    background-image:
      radial-gradient(1200px 600px at 85% -5%, rgba(47, 107, 255, 0.22), transparent 60%),
      radial-gradient(900px 500px at -10% 25%, rgba(23, 88, 160, 0.16), transparent 60%),
      radial-gradient(rgba(108, 222, 255, 0.18) 1px, transparent 1px);
    background-size: auto, auto, 28px 28px;
    color: var(--text-main);
    line-height: 1.75;
    -webkit-font-smoothing: antialiased;
    overflow-x: hidden;
  }

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

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

  button,
  input {
    font-family: inherit;
  }

  .container-x {
    max-width: 1260px;
    margin-left: auto;
    margin-right: auto;
    padding-left: 32px;
    padding-right: 32px;
  }

  .glass {
    background: var(--glass);
    border: 1px solid rgba(255, 255, 255, 0.12);
    border-top-color: rgba(255, 255, 255, 0.28);
    backdrop-filter: blur(14px);
    -webkit-backdrop-filter: blur(14px);
    border-radius: 20px;
    box-shadow: 0 18px 40px -28px rgba(5, 10, 30, 0.9);
    transition: background 0.25s ease, transform 0.25s ease, box-shadow 0.25s ease;
  }

  .glass:hover {
    background: var(--glass-hover);
    box-shadow: 0 18px 40px -28px rgba(5, 10, 30, 0.85), 0 0 40px rgba(48, 131, 255, 0.22);
  }

  .site-header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 60;
    height: 72px;
    background: rgba(6, 11, 24, 0.72);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  }

  .site-header-bar {
    height: 72px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 24px;
  }

  .brand {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    color: #fff;
    font-weight: 700;
    font-size: 1.05rem;
    white-space: nowrap;
  }

  .brand-mark {
    width: 34px;
    height: 34px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border-radius: 10px;
    background: linear-gradient(135deg, rgba(47, 107, 255, 0.45), rgba(108, 222, 255, 0.2));
    border: 1px solid rgba(108, 222, 255, 0.35);
    box-shadow: 0 0 16px rgba(47, 107, 255, 0.25);
  }

  .desktop-nav {
    display: flex;
    align-items: center;
    gap: 28px;
  }

  .nav-link {
    color: var(--text-sub);
    font-size: 0.9rem;
    letter-spacing: 0.02em;
    padding: 8px 0;
    border-bottom: 2px solid transparent;
    transition: color 0.2s ease, border-color 0.2s ease;
  }

  .nav-link:hover {
    color: #fff;
  }

  .nav-link.active {
    color: #fff;
    border-bottom-color: var(--cyan);
  }

  .btn-primary {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    border-radius: 10px;
    padding: 11px 22px;
    font-size: 0.92rem;
    font-weight: 600;
    color: #fff;
    background: linear-gradient(135deg, #2467f0 0%, #2f88ff 100%);
    border: 1px solid rgba(108, 222, 255, 0.42);
    box-shadow: 0 0 0 3px rgba(47, 107, 255, 0.14), 0 10px 28px -14px rgba(47, 107, 255, 0.8);
    transition: transform 0.2s ease, box-shadow 0.2s ease, filter 0.2s ease;
  }

  .btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 0 0 3px rgba(108, 222, 255, 0.18), 0 16px 36px -14px rgba(47, 107, 255, 0.9);
    filter: brightness(1.05);
  }

  .btn-secondary {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    border-radius: 10px;
    padding: 11px 22px;
    font-size: 0.92rem;
    font-weight: 500;
    color: var(--text-main);
    background: rgba(255, 255, 255, 0.06);
    border: 1px solid rgba(255, 255, 255, 0.16);
    transition: background 0.2s ease, border-color 0.2s ease, transform 0.2s ease;
  }

  .btn-secondary:hover {
    background: rgba(255, 255, 255, 0.12);
    border-color: rgba(108, 222, 255, 0.35);
    transform: translateY(-1px);
  }

  .chip {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    border-radius: 999px;
    background: rgba(108, 222, 255, 0.1);
    border: 1px solid rgba(108, 222, 255, 0.28);
    color: #bdefff;
    padding: 4px 12px;
    font-size: 0.75rem;
    letter-spacing: 0.04em;
  }

  .section-title-lg {
    font-size: clamp(1.8rem, 3.2vw, 2.7rem);
    line-height: 1.25;
    font-weight: 800;
    letter-spacing: -0.02em;
  }

  .route-menu a {
    display: flex;
    align-items: flex-start;
    gap: 12px;
    border-radius: 14px;
    padding: 12px 14px;
    color: var(--text-sub);
    font-size: 0.9rem;
    transition: background 0.2s ease, color 0.2s ease;
  }

  .route-menu a:hover,
  .route-menu a.active {
    background: rgba(47, 107, 255, 0.12);
    color: #fff;
  }

  .route-num {
    width: 28px;
    height: 28px;
    flex-shrink: 0;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border-radius: 8px;
    background: rgba(47, 107, 255, 0.18);
    border: 1px solid rgba(108, 222, 255, 0.24);
    color: var(--cyan);
    font-size: 0.78rem;
    font-weight: 700;
  }

  .mobile-tabbar {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    z-index: 55;
    display: none;
    background: rgba(4, 8, 18, 0.88);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border-top: 1px solid rgba(255, 255, 255, 0.1);
  }

  .mobile-tabbar a {
    flex: 1;
    min-height: 62px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 2px;
    color: var(--text-muted);
    font-size: 0.72rem;
    border-top: 2px solid transparent;
    transition: color 0.2s ease;
  }

  .mobile-tabbar a.active {
    color: var(--cyan);
    border-top-color: var(--cyan);
  }

  .mobile-tabbar.btn-tab {
    background: linear-gradient(135deg, #2467f0, #37a6ff);
    border-top: none;
    color: #fff;
    border-radius: 0;
  }

  .mobile-tabbar.btn-tab a {
    color: #fff;
    border-top: none;
  }

  .foot-col-title {
    color: #dbe8ff;
    font-size: 0.82rem;
    font-weight: 600;
    margin-bottom: 12px;
    letter-spacing: 0.04em;
  }

  .foot-link {
    display: block;
    color: var(--text-muted);
    font-size: 0.85rem;
    margin-bottom: 10px;
    transition: color 0.2s ease;
  }

  .foot-link:hover {
    color: #cde0ff;
  }

  .footer {
    background: #050812;
    border-top: 1px solid rgba(255, 255, 255, 0.07);
    padding-top: 54px;
  }

  .copyright-line {
    margin-top: 42px;
    padding: 18px 0;
    border-top: 1px solid rgba(255, 255, 255, 0.06);
    display: flex;
    flex-wrap: wrap;
    justify-content: space-between;
    gap: 8px;
    color: #557099;
    font-size: 0.78rem;
  }

  details.faq-item {
    border-bottom: 1px solid rgba(255, 255, 255, 0.12);
    padding: 22px 4px;
  }

  details.faq-item summary {
    list-style: none;
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    gap: 20px;
    align-items: center;
    font-weight: 600;
    color: #eef5ff;
    font-size: 1.02rem;
  }

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

  details.faq-item summary .faq-plus {
    position: relative;
    width: 18px;
    height: 18px;
    flex-shrink: 0;
  }

  details.faq-item summary .faq-plus::before,
  details.faq-item summary .faq-plus::after {
    content: "";
    position: absolute;
    top: 50%;
    left: 50%;
    width: 18px;
    height: 2px;
    background: var(--cyan);
    border-radius: 4px;
    transform: translate(-50%, -50%);
    transition: opacity 0.2s ease, transform 0.2s ease;
  }

  details.faq-item summary .faq-plus::after {
    opacity: 1;
    transform: translate(-50%, -50%) rotate(90deg);
  }

  details.faq-item[open] summary .faq-plus::after {
    opacity: 0;
    transform: translate(-50%, -50%) rotate(0deg);
  }

  details.faq-item .faq-body {
    color: var(--text-sub);
    font-size: 0.92rem;
    line-height: 1.9;
    padding-right: 28px;
    margin-top: 10px;
  }

  @media (max-width: 1024px) {
    .container-x {
      padding-left: 24px;
      padding-right: 24px;
    }
  }

  @media (max-width: 768px) {
    .desktop-nav,
    .desktop-cta {
      display: none;
    }

    .site-header,
    .site-header-bar {
      height: 62px;
    }

    .mobile-tabbar {
      display: flex;
    }

    .footer {
      padding-bottom: 94px;
    }

    .container-x {
      padding-left: 20px;
      padding-right: 20px;
    }
  }

  @media (max-width: 520px) {
    .brand-text {
      font-size: 0.98rem;
    }

    .mobile-tabbar a {
      font-size: 0.68rem;
    }
  }

/* roulang page: article */
:root {
  --bg-deep: #060B18;
  --bg-panel: #0B1328;
  --bg-soft: #0C1630;
  --bg-card: rgba(255, 255, 255, 0.055);
  --bg-card-hover: rgba(255, 255, 255, 0.095);
  --glass-border: rgba(255, 255, 255, 0.10);
  --glass-highlight: rgba(255, 255, 255, 0.22);
  --blue-primary: #2F6BFF;
  --cyan-highlight: #6CDEFF;
  --text-body: #F2F7FF;
  --text-muted: #AEBFE0;
  --text-faint: #7388AC;
  --success: #35E0A1;
  --warning: #FFB454;
  --danger: #FF6F91;
  --radius-large: 28px;
  --radius-medium: 18px;
  --radius-control: 10px;
  --shadow-panel: 0 18px 40px -28px rgba(5, 10, 30, 0.9);
  --shadow-glow: 0 20px 44px -24px rgba(47, 107, 255, 0.55);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans CJK SC", sans-serif;
  background-color: var(--bg-deep);
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.022) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.022) 1px, transparent 1px);
  background-size: 36px 36px;
  color: var(--text-body);
  line-height: 1.7;
  overflow-x: hidden;
}

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

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

button,
input {
  font-family: inherit;
}

a:focus-visible,
button:focus-visible {
  outline: 2px solid var(--cyan-highlight);
  outline-offset: 3px;
  border-radius: 8px;
}

.container {
  width: 100%;
  max-width: 1280px;
  margin: 0 auto;
  padding-left: 32px;
  padding-right: 32px;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 80;
  background: rgba(6, 11, 24, 0.76);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.site-header-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 72px;
  gap: 24px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 11px;
  min-height: 44px;
  flex-shrink: 0;
}

.brand-mark {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: 12px;
  background: linear-gradient(135deg, #2F6BFF 0%, #6CDEFF 100%);
  box-shadow: 0 0 0 1px rgba(255, 255, 255, 0.18), 0 10px 28px -10px rgba(47, 107, 255, 0.9);
}

.brand-mark svg {
  width: 20px;
  height: 20px;
  stroke: #fff;
}

.brand-text {
  font-size: 19px;
  font-weight: 800;
  letter-spacing: -0.01em;
  color: #F2F7FF;
  white-space: nowrap;
}

.desktop-nav {
  display: flex;
  align-items: center;
  gap: 4px;
}

.nav-link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 8px 14px;
  border-radius: 10px;
  color: var(--text-muted);
  font-size: 15px;
  font-weight: 500;
  transition: color 0.2s ease, background 0.2s ease, transform 0.2s ease;
}

.nav-link:hover {
  color: #fff;
  background: rgba(255, 255, 255, 0.08);
  transform: translateY(-1px);
}

.nav-link.active {
  color: #fff;
  background: rgba(47, 107, 255, 0.16);
  box-shadow: inset 0 0 0 1px rgba(108, 222, 255, 0.14);
}

.btn-primary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 10px 22px;
  border-radius: 10px;
  border: 0;
  cursor: pointer;
  background: linear-gradient(120deg, #2F6BFF 0%, #67DFFF 100%);
  color: #fff;
  font-size: 15px;
  font-weight: 700;
  min-height: 44px;
  transition: transform 0.2s ease, box-shadow 0.2s ease, filter 0.2s ease;
  box-shadow: 0 18px 40px -18px rgba(47, 107, 255, 0.8);
}

.btn-primary:hover {
  transform: translateY(-2px);
  filter: brightness(1.06);
  box-shadow: 0 22px 48px -18px rgba(108, 222, 255, 0.55);
}

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

.desktop-cta {
  white-space: nowrap;
  margin-left: 4px;
}

.article-hero {
  position: relative;
  padding: 78px 0 62px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  background:
    linear-gradient(180deg, rgba(6, 11, 24, 0.94), rgba(8, 16, 32, 0.88)),
    url('/assets/images/backpic/back-2.png') center / cover no-repeat;
  overflow: hidden;
}

.article-hero::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background: radial-gradient(680px at 18% 20%, rgba(47, 107, 255, 0.14), transparent 70%),
              radial-gradient(500px at 86% 12%, rgba(108, 222, 255, 0.08), transparent 62%);
}

.article-hero .container {
  position: relative;
  z-index: 1;
}

.crumb {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 9px;
  margin-bottom: 34px;
  color: var(--text-muted);
  font-size: 13px;
  line-height: 1.5;
}

.crumb a {
  color: var(--text-muted);
  transition: color 0.2s ease;
}

.crumb a:hover {
  color: var(--cyan-highlight);
}

.crumb-sep {
  opacity: 0.45;
}

.crumb-cat {
  color: var(--text-muted);
}

.crumb-current {
  color: var(--text-faint);
  max-width: 48ch;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.article-title {
  max-width: 18em;
  margin: 0;
  font-size: clamp(34px, 5.2vw, 58px);
  line-height: 1.16;
  font-weight: 800;
  letter-spacing: -0.02em;
  color: #F8FBFF;
  text-wrap: balance;
}

.article-meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 12px;
  margin-top: 28px;
  font-size: 14px;
  color: var(--text-muted);
}

.meta-cat {
  display: inline-flex;
  align-items: center;
  padding: 6px 14px;
  border-radius: 999px;
  background: rgba(47, 107, 255, 0.15);
  border: 1px solid rgba(108, 222, 255, 0.16);
  color: #C9E3FF;
  font-size: 13px;
  font-weight: 600;
}

.meta-dot {
  width: 3px;
  height: 3px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.38);
}

.article-main {
  background:
    radial-gradient(700px at 10% 10%, rgba(47, 107, 255, 0.08), transparent 55%),
    var(--bg-panel);
  padding: 86px 0 100px;
}

.article-column {
  max-width: 84ch;
  margin: 0 auto;
}

.article-content {
  font-size: 17px;
  line-height: 1.9;
  color: #E3EDFF;
  word-break: break-word;
}

.article-content > * + * {
  margin-top: 1.2em;
}

.article-content p {
  margin: 1.2em 0;
  font-size: 17px;
  line-height: 1.9;
}

.article-content h2 {
  font-size: 1.55rem;
  line-height: 1.4;
  font-weight: 800;
  color: #F8FBFF;
  margin: 2em 0 0.9em;
  padding-left: 16px;
  border-left: 4px solid var(--cyan-highlight);
}

.article-content h3 {
  font-size: 1.25rem;
  line-height: 1.45;
  font-weight: 700;
  color: #EAF4FF;
  margin: 1.8em 0 0.75em;
}

.article-content blockquote {
  margin: 1.8em 0;
  padding: 18px 24px;
  border-radius: 16px;
  border-left: 3px solid var(--cyan-highlight);
  background: rgba(108, 222, 255, 0.08);
  color: #CDE8FF;
}

.article-content ul {
  list-style: none;
  margin: 1.5em 0;
}

.article-content ul > li {
  position: relative;
  padding-left: 26px;
  margin: 0.65em 0;
}

.article-content ul > li::before {
  content: "";
  position: absolute;
  left: 4px;
  top: 0.82em;
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--blue-primary), var(--cyan-highlight));
}

.article-content ol {
  margin: 1.5em 0;
  padding-left: 1.4em;
  list-style: decimal;
}

.article-content pre {
  overflow-x: auto;
  padding: 22px;
  margin: 1.6em 0;
  border-radius: 16px;
  background: #060B18;
  border: 1px solid rgba(255, 255, 255, 0.09);
  color: #BDE6FF;
  font-size: 14px;
  line-height: 1.8;
}

.article-content img {
  border-radius: 18px;
  margin: 1.6em 0;
  border: 1px solid rgba(255, 255, 255, 0.08);
}

.article-content a {
  color: var(--cyan-highlight);
  border-bottom: 1px solid rgba(108, 222, 255, 0.35);
  transition: border-color 0.2s ease, color 0.2s ease;
}

.article-content a:hover {
  color: #fff;
  border-bottom-color: #fff;
}

.article-content table {
  width: 100%;
  border-collapse: collapse;
  margin: 1.6em 0;
  font-size: 15px;
}

.article-content th,
.article-content td {
  padding: 12px 14px;
  border: 1px solid rgba(255, 255, 255, 0.12);
  line-height: 1.7;
}

.article-content th {
  background: rgba(255, 255, 255, 0.06);
  color: #fff;
}

.article-tags {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
  margin-top: 54px;
  padding-top: 32px;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.tag-label {
  color: var(--text-faint);
  font-size: 13px;
  margin-right: 2px;
}

.tag-chip {
  display: inline-flex;
  align-items: center;
  padding: 7px 14px;
  border-radius: 999px;
  background: rgba(108, 222, 255, 0.08);
  border: 1px solid rgba(108, 222, 255, 0.18);
  color: #9DE8FF;
  font-size: 13px;
  transition: background 0.2s ease, color 0.2s ease, border-color 0.2s ease;
}

.tag-chip:hover {
  background: rgba(108, 222, 255, 0.16);
  border-color: rgba(108, 222, 255, 0.42);
  color: #fff;
}

.rec-section {
  margin-top: 72px;
}

.section-heading {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin-bottom: 30px;
}

.section-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: var(--cyan-highlight);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.04em;
}

.section-eyebrow::before {
  content: "";
  width: 18px;
  height: 2px;
  border-radius: 2px;
  background: var(--cyan-highlight);
  box-shadow: 0 0 16px rgba(108, 222, 255, 0.6);
}

.rec-section h2 {
  margin: 0;
  font-size: clamp(24px, 3vw, 34px);
  font-weight: 800;
  line-height: 1.3;
  color: #F8FBFF;
}

.rec-card {
  display: block;
  border-radius: 22px;
  overflow: hidden;
  background: rgba(255, 255, 255, 0.045);
  border: 1px solid rgba(255, 255, 255, 0.1);
  transition: transform 0.25s ease, box-shadow 0.25s ease, border-color 0.25s ease;
  height: 100%;
}

.rec-card:hover {
  transform: translateY(-6px);
  border-color: rgba(108, 222, 255, 0.34);
  box-shadow: 0 24px 44px -28px rgba(5, 10, 30, 0.9), 0 0 42px rgba(47, 107, 255, 0.2);
}

.rec-cover {
  overflow: hidden;
  background: rgba(255, 255, 255, 0.05);
}

.rec-cover img {
  width: 100%;
  aspect-ratio: 16 / 9;
  object-fit: cover;
  transition: transform 0.45s ease, opacity 0.3s ease;
}

.rec-card:hover .rec-cover img {
  transform: scale(1.06);
}

.rec-body {
  padding: 24px;
}

.rec-kicker {
  font-size: 13px;
  color: var(--cyan-highlight);
  font-weight: 600;
  margin-bottom: 8px;
}

.rec-body h3 {
  margin: 0 0 10px;
  font-size: 20px;
  font-weight: 750;
  line-height: 1.4;
  color: #F8FBFF;
}

.rec-desc {
  margin: 0;
  font-size: 14px;
  line-height: 1.8;
  color: var(--text-muted);
}

.cta-strip {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 22px;
  margin-top: 78px;
  padding: 36px 40px;
  border-radius: 28px;
  border: 1px solid rgba(108, 222, 255, 0.14);
  background:
    radial-gradient(500px at 85% 15%, rgba(108, 222, 255, 0.12), transparent 55%),
    rgba(255, 255, 255, 0.05);
  box-shadow: var(--shadow-panel);
}

.cta-strip h2 {
  margin: 0;
  font-size: 24px;
  font-weight: 800;
  color: #F8FBFF;
}

.cta-strip p {
  margin: 10px 0 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--text-muted);
  max-width: 62ch;
}

.empty-card {
  padding: 80px 24px;
  text-align: center;
  border-radius: 28px;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.1);
}

.empty-card .empty-icon {
  display: inline-flex;
  width: 56px;
  height: 56px;
  align-items: center;
  justify-content: center;
  border-radius: 18px;
  background: rgba(47, 107, 255, 0.16);
  color: var(--cyan-highlight);
  margin-bottom: 22px;
}

.empty-card h2 {
  font-size: 26px;
  font-weight: 800;
  margin: 0 0 12px;
  color: #F8FBFF;
}

.empty-card p {
  color: var(--text-muted);
  font-size: 15px;
  max-width: 56ch;
  margin: 0 auto 28px;
  line-height: 1.9;
}

.footer {
  padding: 76px 0 44px;
  background: #050812;
  border-top: 1px solid rgba(255, 255, 255, 0.05);
}

.footer .container {
  position: relative;
}

.footer .container::before {
  content: "";
  position: absolute;
  top: -1px;
  left: 32px;
  right: 32px;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(108, 222, 255, 0.24), transparent);
}

.foot-col-title {
  font-size: 14px;
  font-weight: 700;
  color: #EAF4FF;
  margin-bottom: 18px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.foot-col-title::after {
  content: "";
  width: 14px;
  height: 2px;
  border-radius: 2px;
  background: linear-gradient(90deg, var(--blue-primary), var(--cyan-highlight));
}

.foot-link {
  display: block;
  margin-top: 12px;
  font-size: 14px;
  color: var(--text-muted);
  line-height: 1.6;
  transition: color 0.2s ease, padding-left 0.2s ease;
}

.foot-link:hover {
  color: var(--cyan-highlight);
  padding-left: 4px;
}

.copyright-line {
  display: flex;
  flex-direction: row;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  flex-wrap: wrap;
  margin-top: 66px;
  padding-top: 24px;
  border-top: 1px solid rgba(255, 255, 255, 0.06);
  font-size: 13px;
  color: var(--text-faint);
}

.mobile-tabbar {
  position: fixed;
  left: 0;
  right: 0;
  bottom: 0;
  z-index: 70;
  display: none;
  align-items: stretch;
  height: calc(64px + env(safe-area-inset-bottom));
  padding-bottom: env(safe-area-inset-bottom);
  background: rgba(6, 11, 24, 0.84);
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
  border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.mobile-tab {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 3px;
  color: var(--text-muted);
  font-size: 12px;
  line-height: 1;
  transition: color 0.2s ease, background 0.2s ease;
  position: relative;
  min-width: 0;
}

.mobile-tab svg {
  width: 20px;
  height: 20px;
  stroke: currentColor;
  fill: none;
  stroke-width: 1.8;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.mobile-tab:hover {
  color: #EAF4FF;
}

.mobile-tab.active {
  color: var(--cyan-highlight);
  background: rgba(108, 222, 255, 0.06);
}

.mobile-tab.active::before {
  content: "";
  position: absolute;
  top: 0;
  width: 20px;
  height: 3px;
  border-radius: 0 0 4px 4px;
  background: var(--cyan-highlight);
  box-shadow: 0 0 14px rgba(108, 222, 255, 0.7);
}

.mobile-tab-cta {
  color: #9DE8FF;
}

@media (min-width: 1024px) {
  .cta-strip {
    flex-direction: row;
    align-items: center;
    justify-content: space-between;
  }
}

@media (max-width: 1023.98px) {
  .desktop-nav,
  .desktop-cta {
    display: none;
  }

  .site-header-bar {
    min-height: 64px;
  }

  .mobile-tabbar {
    display: flex;
  }

  .footer {
    padding-bottom: calc(96px + env(safe-area-inset-bottom));
  }

  .article-main {
    padding: 56px 0 88px;
  }

  .article-title {
    font-size: clamp(30px, 6vw, 44px);
  }
}

@media (max-width: 720px) {
  .container {
    padding-left: 20px;
    padding-right: 20px;
  }

  .article-hero {
    padding: 54px 0 46px;
  }

  .crumb {
    margin-bottom: 24px;
    font-size: 12px;
  }

  .article-meta {
    margin-top: 22px;
    gap: 10px;
    font-size: 13px;
  }

  .article-content {
    font-size: 16px;
  }

  .article-content p {
    font-size: 16px;
  }

  .article-content h2 {
    font-size: 1.4rem;
  }

  .article-tags {
    margin-top: 44px;
    padding-top: 26px;
  }

  .cta-strip {
    padding: 28px 22px;
    margin-top: 56px;
  }

  .rec-section {
    margin-top: 56px;
  }

  .copyright-line {
    flex-direction: column;
    align-items: flex-start;
    margin-top: 48px;
  }
}

/* roulang page: category3 */
:root {
        --bg-0: #060B18;
        --bg-1: #0B1328;
        --bg-2: #081020;
        --panel: rgba(255, 255, 255, 0.055);
        --panel-hover: rgba(255, 255, 255, 0.095);
        --line: rgba(255, 255, 255, 0.10);
        --line-high: rgba(255, 255, 255, 0.28);
        --blue: #2F6BFF;
        --cyan: #6CDEFF;
        --green: #35E0A1;
        --amber: #FFB454;
        --pink: #FF6F91;
        --text: #F2F7FF;
        --sub: #AEBFE0;
        --muted: #7388AC;
        --radius-lg: 28px;
        --radius-md: 18px;
        --radius-sm: 10px;
        --shadow: 0 18px 40px -28px rgba(5, 10, 30, 0.9);
        --shadow-hover: 0 18px 40px -28px rgba(5, 10, 30, 0.9), 0 0 40px rgba(48, 131, 255, 0.22);
    }

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

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

    body {
        margin: 0;
        font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans CJK SC", sans-serif;
        background: var(--bg-0);
        color: var(--text);
        line-height: 1.8;
        min-height: 100vh;
        background-image: linear-gradient(rgba(6, 11, 24, 0.92), rgba(6, 11, 24, 0.88)), radial-gradient(rgba(108, 222, 255, 0.08) 1px, transparent 1px);
        background-size: auto, 22px 22px;
        overflow-x: hidden;
    }

    body::selection {
        background: rgba(47, 107, 255, 0.32);
        color: #fff;
    }

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

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

    button,
    input {
        font-family: inherit;
    }

    .container {
        max-width: 1280px;
        margin: 0 auto;
        padding-left: 32px;
        padding-right: 32px;
        width: 100%;
    }

    @media (max-width: 768px) {
        .container {
            padding-left: 20px;
            padding-right: 20px;
        }
    }

    /* Header */
    .site-header {
        position: sticky;
        top: 0;
        z-index: 50;
        height: 72px;
        background: rgba(6, 11, 24, 0.72);
        backdrop-filter: blur(14px);
        -webkit-backdrop-filter: blur(14px);
        border-bottom: 1px solid rgba(255, 255, 255, 0.10);
    }

    .site-header-bar {
        height: 72px;
        display: flex;
        align-items: center;
        justify-content: space-between;
        gap: 20px;
    }

    .brand {
        display: inline-flex;
        align-items: center;
        gap: 10px;
        color: #fff;
        font-weight: 700;
        letter-spacing: .01em;
    }

    .brand-mark {
        width: 34px;
        height: 34px;
        flex: 0 0 34px;
        display: inline-flex;
        align-items: center;
        justify-content: center;
        border-radius: 10px;
        background: linear-gradient(135deg, rgba(47, 107, 255, .9), rgba(108, 222, 255, .8));
        box-shadow: 0 0 16px rgba(108, 222, 255, .35);
        color: #fff;
    }

    .brand-text {
        font-size: 18px;
        white-space: nowrap;
        background: linear-gradient(90deg, #fff 10%, #DDEBFF);
        -webkit-background-clip: text;
        background-clip: text;
        color: transparent;
        letter-spacing: .02em;
    }

    .desktop-nav {
        display: flex;
        align-items: center;
        gap: 6px;
        margin-left: auto;
    }

    .nav-link {
        display: inline-flex;
        align-items: center;
        justify-content: center;
        padding: 9px 16px;
        border-radius: 20px;
        color: var(--sub);
        font-size: 15px;
        font-weight: 500;
        transition: all .2s ease;
        position: relative;
    }

    .nav-link:hover {
        color: #fff;
        background: rgba(255, 255, 255, 0.06);
    }

    .nav-link.active {
        color: #fff;
    }

    .nav-link.active::after {
        content: "";
        position: absolute;
        bottom: 5px;
        left: 50%;
        transform: translateX(-50%);
        width: 16px;
        height: 2px;
        border-radius: 99px;
        background: var(--cyan);
        box-shadow: 0 0 8px rgba(108, 222, 255, .9);
    }

    .desktop-cta {
        margin-left: 6px;
    }

    /* Buttons */
    .btn-primary,
    .btn-secondary {
        display: inline-flex;
        align-items: center;
        justify-content: center;
        gap: 8px;
        border-radius: 10px;
        font-weight: 600;
        line-height: 1;
        white-space: nowrap;
        border: 0;
        transition: all .22s ease;
        cursor: pointer;
    }

    .btn-primary {
        background: linear-gradient(90deg, #2F6BFF, #4D9EFF 60%, #6CDEFF);
        color: #fff;
        box-shadow: 0 0 18px rgba(47, 107, 255, .35);
        padding: 12px 22px;
    }

    .btn-primary.lg {
        font-size: 16px;
        padding: 14px 26px;
    }

    .btn-primary:hover {
        box-shadow: 0 0 26px rgba(108, 222, 255, .5);
        transform: translateY(-2px);
    }

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

    .btn-secondary {
        background: rgba(255, 255, 255, 0.07);
        border: 1px solid var(--line);
        color: var(--text);
        padding: 12px 22px;
        box-shadow: var(--shadow);
    }

    .btn-secondary:hover {
        background: rgba(255, 255, 255, 0.12);
        border-color: rgba(108, 222, 255, .5);
    }

    /* Section */
    .section {
        padding: 104px 0;
    }

    .section.tight {
        padding: 72px 0;
    }

    .section-alt {
        background: rgba(11, 19, 40, .35);
        border-top: 1px solid rgba(255, 255, 255, 0.06);
        border-bottom: 1px solid rgba(255, 255, 255, 0.06);
    }

    .section-kicker {
        display: inline-flex;
        align-items: center;
        gap: 8px;
        font-size: 13px;
        font-weight: 600;
        color: var(--cyan);
        padding: 6px 14px;
        border-radius: 100px;
        background: rgba(108, 222, 255, 0.08);
        border: 1px solid rgba(108, 222, 255, 0.16);
    }

    .section-title {
        font-size: clamp(28px, 4vw, 36px);
        line-height: 1.24;
        font-weight: 700;
        color: #fff;
        letter-spacing: -0.02em;
        margin-bottom: 16px;
    }

    .section-intro {
        color: var(--sub);
        font-size: 16px;
        max-width: 860px;
    }

    .eyebrow {
        font-size: 15px;
        color: var(--cyan);
        font-weight: 600;
        letter-spacing: .06em;
        text-transform: none;
        margin-bottom: 10px;
        display: block;
    }

    /* Glass Cards */
    .glass-card,
    .feature-card,
    .qa-panel,
    .stat-card {
        background: var(--panel);
        border: 1px solid var(--line);
        border-top-color: var(--line-high);
        border-radius: var(--radius-md);
        box-shadow: var(--shadow);
        transition: transform .25s ease, box-shadow .25s ease, background .25s ease;
    }

    .glass-card:hover,
    .feature-card:hover,
    .cha-card:hover {
        background: var(--panel-hover);
        box-shadow: var(--shadow-hover);
        transform: translateY(-4px);
    }

    /* Hero */
    .page-hero {
        min-height: 520px;
        display: flex;
        align-items: center;
        padding: 112px 0 88px;
        background-image: url(/assets/images/backpic/back-1.webp);
        background-size: cover;
        background-position: center;
        position: relative;
    }

    .page-hero::after {
        content: "";
        position: absolute;
        inset: 0;
        background: linear-gradient(180deg, rgba(6, 11, 24, .86) 10%, rgba(6, 11, 24, .52) 60%, rgba(6, 11, 24, .96) 100%);
        pointer-events: none;
    }

    .page-hero>.container {
        position: relative;
        z-index: 2;
    }

    .hero-title {
        font-size: clamp(36px, 6.2vw, 58px);
        font-weight: 800;
        letter-spacing: -0.03em;
        line-height: 1.12;
        margin-bottom: 20px;
        color: #fff;
    }

    .hero-sub {
        font-size: 16px;
        line-height: 1.9;
        color: #D7E6FA;
        max-width: 760px;
        margin-bottom: 22px;
    }

    .hero-meta-tags {
        display: flex;
        flex-wrap: wrap;
        gap: 10px;
        max-width: 680px;
    }

    .meta-tag {
        color: #BBD3FF;
        background: rgba(255, 255, 255, 0.07);
        border: 1px solid rgba(255, 255, 255, 0.14);
        border-radius: 100px;
        padding: 7px 14px;
        font-size: 13px;
        font-weight: 500;
    }

    /* FAQ Details */
    .qa-list {
        max-width: 900px;
        margin: 0 auto;
        display: grid;
        gap: 16px;
    }

    details.qa-item {
        background: rgba(255, 255, 255, 0.05);
        border: 1px solid rgba(255, 255, 255, 0.10);
        border-top-color: rgba(255, 255, 255, 0.28);
        border-radius: 18px;
        overflow: hidden;
        transition: background .2s;
    }

    details.qa-item:hover {
        background: rgba(255, 255, 255, 0.075);
    }

    details.qa-item summary {
        list-style: none;
        padding: 20px 26px;
        display: flex;
        align-items: center;
        justify-content: space-between;
        gap: 18px;
        cursor: pointer;
        font-weight: 600;
        font-size: 16px;
        line-height: 1.6;
        color: var(--text);
    }

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

    .qa-item-title {
        display: flex;
        gap: 12px;
        align-items: flex-start;
    }

    .qa-num {
        color: var(--cyan);
        font-size: 14px;
        font-weight: 700;
        margin-top: 3px;
        flex: 0 0 auto;
    }

    .qa-plus {
        position: relative;
        width: 22px;
        height: 22px;
        flex: 0 0 auto;
        border-radius: 50%;
        background: rgba(108, 222, 255, 0.1);
        border: 1px solid rgba(108, 222, 255, 0.3);
        transition: all .3s ease;
    }

    .qa-plus::before,
    .qa-plus::after {
        content: "";
        position: absolute;
        background: var(--cyan);
        border-radius: 2px;
        left: 50%;
        top: 50%;
        transform: translate(-50%, -50%);
    }

    .qa-plus::before {
        width: 10px;
        height: 1.6px;
    }

    .qa-plus::after {
        width: 1.6px;
        height: 10px;
    }

    details[open] .qa-plus::after {
        opacity: 0;
    }

    details .qa-body {
        padding: 0 26px 22px 62px;
        color: var(--sub);
        font-size: 15px;
    }

    details .qa-body p {
        margin-top: 0;
    }

    .qa-body ul {
        padding-left: 20px;
        margin: 8px 0 12px;
        display: grid;
        gap: 8px;
    }

    /* Cards */
    .feature-card {
        padding: 28px;
        border-radius: 20px;
        height: 100%;
    }

    .feature-icon {
        width: 40px;
        height: 40px;
        border-radius: 12px;
        display: flex;
        align-items: center;
        justify-content: center;
        background: rgba(47, 107, 255, .16);
        border: 1px solid rgba(108, 222, 255, .35);
        color: var(--cyan);
        margin-bottom: 18px;
    }

    .feature-card h3 {
        font-size: 18px;
        margin: 0 0 9px;
        color: #fff;
        font-weight: 700;
        line-height: 1.4;
    }

    .feature-card p {
        margin: 0;
        color: var(--sub);
        font-size: 15px;
        line-height: 1.8;
    }

    .list-dot {
        list-style: none;
        padding: 0;
        margin: 18px 0 0;
        display: grid;
        gap: 12px;
    }

    .list-dot li {
        position: relative;
        padding-left: 26px;
        color: var(--sub);
        font-size: 15px;
        line-height: 1.8;
    }

    .list-dot li::before {
        content: "";
        position: absolute;
        left: 2px;
        top: 11px;
        width: 8px;
        height: 8px;
        border-radius: 50%;
        background: linear-gradient(135deg, var(--blue), var(--cyan));
        box-shadow: 0 0 8px rgba(108, 222, 255, .6);
    }

    .security-card {
        border-radius: 22px;
        background:
            linear-gradient(135deg, rgba(108, 222, 255, 0.12), transparent 55%),
            rgba(255, 255, 255, 0.06);
        border: 1px solid rgba(108, 222, 255, 0.22);
        padding: 34px;
    }

    .notice-item {
        display: flex;
        gap: 14px;
        align-items: flex-start;
        margin: 16px 0;
        color: var(--sub);
    }

    .notice-icon {
        flex: 0 0 24px;
        width: 24px;
        height: 24px;
        border-radius: 30px;
        display: flex;
        align-items: center;
        justify-content: center;
        border: 1px solid rgba(108, 222, 255, .3);
    }

    /* Footer */
    .footer {
        background: #050812;
        position: relative;
        border-top: 1px solid rgba(255, 255, 255, 0.08);
        padding: 72px 0 100px;
    }

    .foot-col-title {
        color: #ffffff;
        font-weight: 600;
        font-size: 15px;
        margin-bottom: 16px;
        letter-spacing: .02em;
    }

    .foot-link {
        display: block;
        color: var(--muted);
        font-size: 14px;
        margin-bottom: 12px;
        max-width: 220px;
        transition: color .2s;
    }

    .foot-link:hover {
        color: var(--cyan);
    }

    .copyright-line {
        display: flex;
        flex-wrap: wrap;
        justify-content: space-between;
        gap: 10px;
        padding-top: 24px;
        margin-top: 36px;
        border-top: 1px solid rgba(255, 255, 255, 0.08);
        color: #506180;
        font-size: 13px;
    }

    /* Mobile bottom tab */
    .mobile-tabbar {
        display: none;
    }

    .mob-add-space {
        display: none;
    }

    @media (max-width: 900px) {
        .desktop-nav,
        .desktop-cta {
            display: none;
        }

        .site-header {
            height: 64px;
        }

        .site-header-bar {
            height: 64px;
        }

        .mob-add-space {
            display: block;
            height: 58px;
        }

        .mobile-tabbar {
            display: flex;
            align-items: center;
            justify-content: space-around;
            position: fixed;
            left: 0;
            right: 0;
            bottom: 0;
            z-index: 60;
            height: calc(62px + env(safe-area-inset-bottom));
            padding-bottom: env(safe-area-inset-bottom);
            background: rgba(6, 11, 24, 0.88);
            backdrop-filter: blur(18px);
            -webkit-backdrop-filter: blur(18px);
            border-top: 1px solid rgba(255, 255, 255, 0.10);
        }

        .tab-item {
            flex: 1;
            display: flex;
            flex-direction: column;
            align-items: center;
            justify-content: center;
            gap: 4px;
            font-size: 11px;
            color: #8FA3C7;
            padding: 6px 2px;
            border-radius: 12px;
            position: relative;
            transition: color .2s;
        }

        .tab-item.active {
            color: var(--cyan);
        }

        .tab-item.active::after {
            content: "";
            position: absolute;
            top: 0;
            left: 50%;
            transform: translateX(-50%);
            width: 24px;
            height: 2.5px;
            border-radius: 0 0 4px 4px;
            background: var(--cyan);
            box-shadow: 0 0 10px rgba(108, 222, 255, .65);
        }
    }

    @media (max-width: 520px) {
        body {
            font-size: 15px;
        }

        .section {
            padding: 64px 0;
        }

        .page-hero {
            min-height: 500px;
            padding: 92px 0 52px;
        }

        .brand-text {
            font-size: 16px;
        }

        .qa-body {
            padding-left: 0 !important;
        }

        details details etc.
    }

    .cta-wrap {
        border-radius: 28px;
        overflow: hidden;
        position: relative;
        padding: 64px 48px;
        background:
            linear-gradient(120deg, rgba(47, 107, 255, .25), rgba(11, 19, 40, .3)),
            url(/assets/images/coverpic/cover-10.png) center/cover no-repeat;
        border: 1px solid rgba(108, 222, 255, 0.25);
    }

    @media (max-width: 640px) {
        .cta-wrap {
            padding: 40px 24px;
        }
    }

/* roulang page: category2 */
:root{
  --bg-deep:#060B18;
  --bg-level:#0B1328;
  --bg-alt:#081020;
  --glass:rgba(255,255,255,0.055);
  --glass-hover:rgba(255,255,255,0.095);
  --line:rgba(255,255,255,0.1);
  --line-light:rgba(255,255,255,0.22);
  --primary:#2F6BFF;
  --highlight:#6CDEFF;
  --text-main:#F2F7FF;
  --text-secondary:#AEBFE0;
  --text-muted:#7388AC;
  --success:#35E0A1;
  --warning:#FFB454;
  --danger:#FF6F91;
  --font-sans:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei","Noto Sans CJK SC",sans-serif;
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{
  font-family:var(--font-sans);
  background-color:#060B18;
  color:var(--text-main);
  line-height:1.75;
  letter-spacing:.01em;
  position:relative;
  min-height:100vh;
  background-image:
    radial-gradient(circle at 78% -8%, rgba(47,107,255,.14), transparent 28%),
    radial-gradient(circle at 8% 36%, rgba(108,222,255,.06), transparent 22%);
}
body::before{
  content:"";
  position:fixed;
  inset:0;
  z-index:0;
  pointer-events:none;
  background-image:radial-gradient(rgba(108,222,255,0.05) 1px, transparent 1.4px);
  background-size:24px 24px;
}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none;transition:color .2s ease, background .2s ease, border-color .2s ease, transform .2s ease, box-shadow .2s ease}
button{font-family:inherit}
::selection{background:rgba(47,107,255,.35);color:#fff}
.container{width:100%;max-width:1280px;margin-inline:auto;padding-inline:24px}
@media(min-width:768px){.container{padding-inline:32px}}

section{position:relative;z-index:1}

/* Header */
.site-header{
  position:sticky;
  top:0;
  z-index:80;
  background:rgba(6,11,24,.72);
  -webkit-backdrop-filter:blur(14px);
  backdrop-filter:blur(14px);
  border-bottom:1px solid rgba(255,255,255,.07);
}
.site-header-bar{
  display:flex;
  align-items:center;
  justify-content:space-between;
  height:72px;
}
.brand{
  display:inline-flex;
  align-items:center;
  gap:10px;
  color:var(--text-main);
  font-weight:700;
  font-size:19px;
  line-height:1.2;
  white-space:nowrap;
}
.brand-mark{
  width:34px;height:34px;
  display:inline-flex;
  align-items:center;
  justify-content:center;
  flex:0 0 auto;
  border-radius:10px;
  background:linear-gradient(135deg,rgba(47,107,255,.95),rgba(108,222,255,.72));
  box-shadow:0 0 22px rgba(48,131,255,.32), inset 0 1px 0 rgba(255,255,255,.3);
}
.brand-text{white-space:nowrap}
.desktop-nav{
  display:flex;
  gap:4px;
  padding:5px;
  border-radius:999px;
  background:rgba(255,255,255,.035);
  border:1px solid rgba(255,255,255,.08);
}
.nav-link{
  padding:7px 13px;
  border-radius:999px;
  color:var(--text-secondary);
  font-size:14.5px;
  font-weight:500;
  line-height:1.5;
}
.nav-link:hover{color:#fff;background:rgba(255,255,255,.07)}
.nav-link.active{
  background:linear-gradient(100deg,rgba(47,107,255,.3),rgba(108,222,255,.12));
  color:#fff;
  box-shadow:inset 0 0 0 1px rgba(108,222,255,.18);
}
.desktop-cta{margin-left:8px;font-size:14.5px;padding:10px 18px}
.btn-primary{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  color:#fff;
  font-weight:600;
  border:1px solid rgba(255,255,255,.2);
  border-radius:10px;
  background:linear-gradient(104deg, #2F6BFF 0%, #3083ff 56%, #45A6FF 130%);
  box-shadow:0 0 28px rgba(48,131,255,.3), 0 16px 30px -22px rgba(6,11,24,.9);
  transition:transform .2s ease, box-shadow .2s ease, border-color .2s ease;
}
.btn-primary:hover{
  transform:translateY(-2px);
  border-color:rgba(108,222,255,.5);
  box-shadow:0 0 38px rgba(48,131,255,.42), 0 18px 32px -24px rgba(5,10,30,.9);
}
.btn-primary:active{transform:translateY(0)}
.btn-primary:focus-visible,.btn-secondary:focus-visible,.nav-link:focus-visible,.bottom-tab:focus-visible{
  outline:2px solid var(--highlight);
  outline-offset:3px;
}
.btn-secondary{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  color:var(--text-main);
  font-weight:600;
  border:1px solid rgba(255,255,255,.18);
  border-radius:10px;
  background:rgba(255,255,255,.06);
  backdrop-filter:blur(8px);
  padding:11px 18px;
  font-size:15px;
}
.btn-secondary:hover{
  background:rgba(255,255,255,.11);
  border-color:rgba(108,222,255,.45);
  box-shadow:0 0 24px rgba(108,222,255,.12);
}

/* Bottom navigation */
.bottom-tabnav{
  display:none;
}
@media(max-width:900px){
  .desktop-nav,.desktop-cta{display:none!important}
  .bottom-tabnav{
    position:fixed;
    left:0;right:0;bottom:0;
    z-index:90;
    display:flex;
    height:calc(64px + env(safe-area-inset-bottom));
    padding-bottom:env(safe-area-inset-bottom);
    background:rgba(6,11,24,.84);
    -webkit-backdrop-filter:blur(16px);
    backdrop-filter:blur(16px);
    border-top:1px solid rgba(255,255,255,.08);
  }
  .bottom-tab{
    flex:1 1 0;
    min-width:0;
    display:flex;
    flex-direction:column;
    align-items:center;
    justify-content:center;
    gap:3px;
    color:#7286A8;
    font-size:11.5px;
    font-weight:500;
    line-height:1;
  }
  .bottom-tab svg{width:20px;height:20px;stroke:currentColor;fill:none;stroke-width:1.8;stroke-linecap:round;stroke-linejoin:round}
  .bottom-tab:hover{color:#D6E4FF}
  .bottom-tab.active{color:var(--highlight)}
  .bottom-tab.active::after{
    content:"";
    display:block;
    width:6px;height:6px;
    border-radius:50%;
    background:var(--highlight);
    box-shadow:0 0 10px var(--highlight);
    margin-top:1px;
  }
  .bottom-tab:not(.active)::after{content:"";display:block;width:6px;height:6px;margin-top:1px}
}

/* Sections */
.section{padding:88px 0}
.section.muted{background:rgba(11,19,40,.46);border-top:1px solid rgba(255,255,255,.04);border-bottom:1px solid rgba(255,255,255,.04)}
.section-head{
  max-width:860px;
  display:flex;
  flex-direction:column;
  gap:12px;
  margin-bottom:48px;
}
.section-head p{color:var(--text-secondary);font-size:16px}
.chip{
  display:inline-flex;
  align-self:flex-start;
  align-items:center;
  gap:7px;
  padding:6px 12px;
  border-radius:999px;
  background:rgba(108,222,255,.08);
  color:var(--highlight);
  border:1px solid rgba(108,222,255,.18);
  font-size:13px;
  font-weight:600;
  letter-spacing:.05em;
}
.titles-line{display:flex;align-items:baseline;justify-content:space-between;gap:16px;flex-wrap:wrap}
h1,h2,h3{line-height:1.3;color:#F7FBFF}
.section-title{font-size:clamp(28px, 4vw, 38px);font-weight:750;letter-spacing:-.02em}
.card-title{font-size:20px;font-weight:650;letter-spacing:-.01em}

/* Hero */
.hero-main{
  position:relative;
  overflow:hidden;
  display:flex;
  align-items:center;
  padding:92px 0 108px;
  min-height:620px;
}
.hero-bg-art{
  position:absolute;
  inset:0;
  z-index:0;
  background:
    linear-gradient(to right, rgba(6,11,24,.94) 0%, rgba(8,16,32,.84) 48%, rgba(10,20,38,.44) 100%),
    url('/assets/images/backpic/back-1.webp') center 12% / cover no-repeat;
}
.hero-bg-art::after{
  content:"";
  position:absolute;
  inset:auto 0 0 0;
  height:120px;
  background:linear-gradient(to bottom, transparent, #060B18);
}
.hero-kicker{color:var(--highlight);font-size:13px;font-weight:600;letter-spacing:.12em;background:rgba(108,222,255,.1);border:1px solid rgba(108,222,255,.24);padding:7px 12px;border-radius:999px;display:inline-flex;align-items:center;gap:8px}
.hero-title{
  margin:20px 0 14px;
  font-size:clamp(38px, 6vw, 66px);
  font-weight:800;
  letter-spacing:-.035em;
  line-height:1.12;
  background:linear-gradient(180deg,#FFFFFF 20%,#BFDFFF 90%);
  -webkit-background-clip:text;
  background-clip:text;
  color:transparent;
}
.hero-desc{max-width:620px;color:var(--text-secondary);font-size:16.5px;line-height:1.9}
.hero-actions{display:flex;align-items:center;gap:14px;flex-wrap:wrap;margin-top:26px}
.hero-actions .btn-primary{padding:12px 22px;font-size:15px}

/* Glass / card */
.glass-panel{
  background:linear-gradient(160deg,rgba(255,255,255,.075),rgba(255,255,255,.035));
  border:1px solid rgba(255,255,255,.13);
  border-top-color:rgba(255,255,255,.24);
  border-radius:20px;
  box-shadow:0 18px 40px -32px rgba(5,10,30,.9);
  backdrop-filter:blur(8px);
  transition:transform .22s ease, background .22s ease, box-shadow .22s ease;
}
.glass-panel:hover{
  background:linear-gradient(160deg,rgba(255,255,255,.11),rgba(255,255,255,.05));
  border-color:rgba(255,255,255,.2);
  box-shadow:0 22px 44px -30px rgba(5,10,30,.96), 0 0 32px rgba(48,131,255,.2);
  transform:translateY(-2px);
}

/* Hero dash */
.hero-dash{padding:0;overflow:hidden}
.dash-head{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:8px;
  padding:14px 16px;
  border-bottom:1px solid rgba(255,255,255,.09);
}
.dash-label{display:inline-flex;align-items:center;gap:8px;color:var(--text-secondary);font-size:13px;font-weight:600}
.dash-label::before{content:"";width:7px;height:7px;border-radius:50%;background:var(--success);box-shadow:0 0 10px rgba(53,224,161,.6)}
.live-badge{display:inline-flex;align-items:center;color:var(--highlight);background:rgba(108,222,255,.1);border:1px solid rgba(108,222,255,.2);font-size:12px;padding:3px 9px;border-radius:999px}
.dash-list{padding:8px 6px}
.dash-row{display:flex;align-items:center;justify-content:space-between;gap:12px;padding:11px 12px;border-radius:12px;color:var(--text-secondary);font-size:14px;border-bottom:1px solid rgba(255,255,255,.04)}
.dash-row span:first-child{display:flex;align-items:center;gap:8px;color:var(--text-main)}
.dash-row strong{font-weight:600;color:#DFF4FF;font-size:13.5px;white-space:nowrap}
.dash-row:last-child{border-bottom:none}
.dash-note{background:rgba(255,180,84,.06);color:#FFE2B8;font-size:12.5px;border-radius:14px;padding:10px 12px;margin:2px 10px 12px;border:1px solid rgba(255,180,84,.18)}
.dash-note strong{color:#FFCE7F}

/* Dynamic digest */
.digest-grid{display:grid;grid-template-columns:repeat(12,1fr);gap:24px}
.digest-main{grid-column:span 8;display:flex;flex-direction:column;overflow:hidden;border-radius:24px}
.digest-main .cover-wrap{position:relative;min-height:230px;max-height:260px;overflow:hidden}
.digest-main img{width:100%;height:100%;object-fit:cover;position:absolute;inset:0}
.digest-main .cover-overlay{position:absolute;inset:0;background:linear-gradient(180deg,transparent 10%,rgba(6,11,24,.72) 98%)}
.digest-main-body{padding:24px;display:flex;flex-direction:column;gap:10px;flex:1}
.digest-main-body h3{font-size:22px;font-weight:680;line-height:1.42}
.digest-main-body p{color:var(--text-secondary);font-size:15px}
.digest-list{grid-column:span 4;display:flex;flex-direction:column;gap:12px;border-radius:24px;padding:18px;background:linear-gradient(160deg,rgba(11,19,40,.8),rgba(8,16,32,.6));border:1px solid rgba(255,255,255,.1);border-top-color:rgba(255,255,255,.22)}
.digest-item{
  display:block;
  border-radius:14px;
  padding:13px 14px;
  background:rgba(255,255,255,.045);
  border:1px solid rgba(255,255,255,.065);
  transition:background .2s ease, border-color .2s ease, transform .2s ease;
}
.digest-item:hover{background:rgba(255,255,255,.09);border-color:rgba(108,222,255,.18);transform:translateX(2px)}
.digest-item .date{display:block;font-size:12px;color:var(--highlight);letter-spacing:.08em;margin-bottom:4px}
.digest-item h4{font-size:15.5px;color:#EAF4FF;font-weight:600;line-height:1.45}
.digest-item p{font-size:13.5px;color:var(--text-muted);margin-top:5px;line-height:1.6}
@media(max-width:1023px){
  .digest-main{grid-column:span 12}
  .digest-list{grid-column:span 12}
  .digest-main .cover-wrap{position:relative;min-height:190px}
}

/* Path compare */
.path-card{padding:26px;display:flex;height:100%;flex-direction:column;justify-content:space-between;gap:18px}
.path-card .body-card{display:flex;flex-direction:column;gap:10px}
.path-icon{
  width:48px;height:48px;display:inline-flex;align-items:center;justify-content:center;
  border-radius:14px;
  background:linear-gradient(135deg,rgba(47,107,255,.32),rgba(108,222,255,.12));
  border:1px solid rgba(108,222,255,.24);
  box-shadow:0 0 22px rgba(48,131,255,.16);
  margin-bottom:4px;
}
.path-card h3{font-size:21px;font-weight:700}
.path-card p{color:var(--text-secondary);font-size:15px;line-height:1.8}
.path-card .btn-line{margin-top:10px}

/* Timeline */
.timeline-wrap{display:grid;grid-template-columns:repeat(12,1fr);gap:32px;align-items:start}
.timeline-intro{grid-column:span 5;position:sticky;top:100px}
.timeline-intro .section-head{margin-bottom:0}
.timeline-runs{grid-column:span 7;display:flex;flex-direction:column;gap:0;position:relative;padding-left:22px}
.timeline-runs::before{content:"";position:absolute;left:5px;top:10px;bottom:10px;width:1px;background:linear-gradient(to bottom,rgba(108,222,255,.4),rgba(47,107,255,.1))}
.timeline-item{position:relative;padding:0 0 26px 18px}
.timeline-item::before{content:"";position:absolute;left:-22px;top:5px;width:10px;height:10px;border-radius:50%;background:#2F6BFF;box-shadow:0 0 0 4px rgba(47,107,255,.2),0 0 16px rgba(108,222,255,.7);z-index:2}
.timeline-item:last-child{padding-bottom:0}
.timeline-item .tl-badge{display:inline-flex;color:#FFCE7F;background:rgba(255,180,84,.09);border:1px solid rgba(255,180,84,.18);padding:3px 9px;border-radius:999px;font-size:12px;font-weight:600;margin-bottom:7px}
.timeline-item h3{font-size:17px;font-weight:650}
.timeline-item p{color:var(--text-secondary);font-size:14.5px;line-height:1.75;margin-top:5px}
@media(max-width:1023px){
  .timeline-intro{grid-column:span 12;position:static}
  .timeline-runs{grid-column:span 12;margin-top:0}
}

/* Principles */
.principle-wrap{display:grid;grid-template-columns:1fr;gap:18px}
@media(min-width:768px){.principle-wrap{grid-template-columns:1fr 1fr 1fr}}
.principle-card{
  padding:24px;
  border-radius:18px;
  height:100%;
  background:linear-gradient(160deg,rgba(255,255,255,.06),rgba(255,255,255,.03));
  border:1px solid rgba(255,255,255,.1);
  border-top-color:rgba(255,255,255,.22);
  box-shadow:0 14px 30px -28px rgba(5,10,30,.9);
}
.principle-card h3{font-size:17px;font-weight:650;color:#EAF4FF;display:flex;gap:9px;align-items:center}
.principle-card h3::before{content:"";width:8px;height:8px;border-radius:50%;background:var(--highlight);box-shadow:0 0 10px var(--highlight)}
.principle-card p{color:var(--text-secondary);font-size:14px;line-height:1.75;margin-top:9px}

/* CTA */
.cta-wrap{
  border-radius:28px;
  overflow:hidden;
  border:1px solid rgba(255,255,255,.14);
  background:
    linear-gradient(115deg, rgba(6,11,24,.93), rgba(12,21,40,.78)),
    url('/assets/images/backpic/back-3.png') center / cover;
  padding:42px 32px;
}
.cta-inner{display:flex;justify-content:space-between;align-items:center;gap:28px;flex-wrap:wrap}
.cta-copy h2{font-size:clamp(24px, 3.4vw, 32px);font-weight:750;letter-spacing:-.02em}
.cta-copy p{color:var(--text-secondary);font-size:15px;max-width:680px;line-height:1.8;margin-top:8px}
.cta-link{display:flex}
@media(max-width:640px){
  .cta-wrap{padding:26px 20px}
  .cta-inner{flex-direction:column;align-items:flex-start}
}

/* Footer */
.footer{
  position:relative;
  z-index:4;
  background:#050812;
  border-top:1px solid rgba(255,255,255,.07);
  margin-top:80px;
  padding:60px 0 86px;
}
.footer::before{
  content:"";
  display:block;
  height:1px;
  max-width:1260px;
  margin-inline:auto;
  background:linear-gradient(90deg,transparent,rgba(108,222,255,.28),transparent);
  position:relative;
  top:-60px;
}
.footer .brand{margin-bottom:16px}
.foot-col-title{color:#D5E2F6;font-weight:600;font-size:15.5px;margin-bottom:13px}
.foot-link{display:block;color:var(--text-muted);font-size:14px;padding:5px 0;line-height:1.7}
.foot-link:hover{color:var(--highlight);padding-left:4px}
.copyright-line{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:12px;
  flex-wrap:wrap;
  border-top:1px solid rgba(255,255,255,.06);
  margin-top:52px;
  padding-top:24px;
  color:var(--text-muted);
  font-size:13px;
}
@media(max-width:900px){
  .section{padding:64px 0}
  .hero-main{padding:66px 0 78px;min-height:0}
  .hero-title{font-size:clamp(34px,9vw,46px)}
  .footer{padding-bottom:128px;margin-top:64px}
}

/* Utility extras */
.list-xs{list-style:none}
.link-arrow{display:inline-flex;align-items:center;gap:6px;color:var(--highlight);font-weight:600;font-size:14px;margin-top:4px}
.link-arrow:hover{color:#fff}
.cover-soft{background:#15253F;min-height:180px;width:100%}