/* roulang page: index */
:root {
      --rl-primary: #2563eb;
      --rl-primary-dark: #1d4ed8;
      --rl-primary-soft: #eaf4ff;
      --rl-accent: #38bdf8;
      --rl-cyan-soft: #ecfeff;
      --rl-bg: #f8fbff;
      --rl-surface: #ffffff;
      --rl-surface-2: #f1f7ff;
      --rl-text: #0f172a;
      --rl-muted: #64748b;
      --rl-muted-2: #94a3b8;
      --rl-border: rgba(37, 99, 235, .12);
      --rl-border-strong: rgba(37, 99, 235, .22);
      --rl-shadow: 0 18px 48px rgba(37, 99, 235, .10);
      --rl-shadow-lg: 0 28px 70px rgba(37, 99, 235, .16);
      --rl-radius-sm: 14px;
      --rl-radius: 22px;
      --rl-radius-lg: 30px;
      --rl-radius-pill: 999px;
      --rl-container: 1220px;
      --rl-ease: cubic-bezier(.22, 1, .36, 1);
      --rl-section: 104px;
    }

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

    html {
      scroll-behavior: smooth;
      scroll-padding-top: 92px;
    }

    body {
      margin: 0;
      font-family: system-ui, -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", "Noto Sans SC", Arial, sans-serif;
      color: var(--rl-text);
      background:
        radial-gradient(circle at 8% 6%, rgba(56, 189, 248, .18), transparent 32%),
        radial-gradient(circle at 88% 16%, rgba(37, 99, 235, .12), transparent 30%),
        linear-gradient(180deg, #ffffff 0%, var(--rl-bg) 42%, #ffffff 100%);
      line-height: 1.75;
      overflow-x: hidden;
      text-rendering: optimizeLegibility;
      -webkit-font-smoothing: antialiased;
    }

    a {
      color: inherit;
      text-decoration: none;
      transition: color .22s var(--rl-ease), background-color .22s var(--rl-ease), border-color .22s var(--rl-ease), transform .22s var(--rl-ease), box-shadow .22s var(--rl-ease);
    }

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

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

    button,
    input,
    textarea,
    select {
      font: inherit;
    }

    button:focus-visible,
    a:focus-visible,
    input:focus-visible,
    textarea:focus-visible {
      outline: 3px solid rgba(56, 189, 248, .34);
      outline-offset: 3px;
      border-radius: 12px;
    }

    p {
      margin-top: 0;
      color: var(--rl-muted);
    }

    h1,
    h2,
    h3,
    h4,
    h5,
    h6 {
      color: var(--rl-text);
      letter-spacing: -.035em;
      line-height: 1.18;
      margin-top: 0;
      font-weight: 800;
    }

    ul {
      padding-left: 1.2rem;
    }

    .container {
      max-width: var(--rl-container);
      padding-left: 24px;
      padding-right: 24px;
    }

    .site-header {
      position: sticky;
      top: 0;
      z-index: 1030;
      background: rgba(255, 255, 255, .92);
      border-bottom: 1px solid rgba(226, 232, 240, .82);
      backdrop-filter: blur(14px);
      transition: box-shadow .25s var(--rl-ease), background-color .25s var(--rl-ease);
    }

    .navbar {
      min-height: 78px;
      padding: 0;
    }

    .navbar-brand {
      display: inline-flex;
      align-items: center;
      gap: 12px;
      color: var(--rl-text);
      font-size: 18px;
      font-weight: 800;
      letter-spacing: -.02em;
      max-width: 72%;
      white-space: normal;
      line-height: 1.28;
    }

    .brand-mark {
      width: 42px;
      height: 42px;
      border-radius: 15px;
      background:
        linear-gradient(135deg, rgba(37, 99, 235, .98), rgba(56, 189, 248, .92)),
        radial-gradient(circle at 30% 20%, rgba(255, 255, 255, .55), transparent 34%);
      box-shadow: 0 14px 30px rgba(37, 99, 235, .22);
      position: relative;
      flex: 0 0 auto;
    }

    .brand-mark::before,
    .brand-mark::after {
      content: "";
      position: absolute;
      border-radius: var(--rl-radius-pill);
      background: rgba(255, 255, 255, .9);
    }

    .brand-mark::before {
      width: 18px;
      height: 4px;
      left: 12px;
      top: 13px;
      box-shadow: 0 8px 0 rgba(255, 255, 255, .66);
    }

    .brand-mark::after {
      width: 7px;
      height: 7px;
      right: 10px;
      bottom: 10px;
    }

    .navbar-nav {
      align-items: center;
      gap: 10px;
    }

    .nav-link {
      position: relative;
      color: #334155;
      font-size: 15px;
      font-weight: 700;
      padding: 10px 16px !important;
      border-radius: var(--rl-radius-pill);
    }

    .nav-link:hover {
      color: var(--rl-primary);
      background: rgba(37, 99, 235, .06);
    }

    .nav-link.active {
      color: var(--rl-primary);
      background: rgba(37, 99, 235, .08);
    }

    .nav-link.active::after {
      content: "";
      position: absolute;
      left: 18px;
      right: 18px;
      bottom: 5px;
      height: 2px;
      border-radius: var(--rl-radius-pill);
      background: linear-gradient(90deg, var(--rl-primary), var(--rl-accent));
    }

    .navbar-toggler {
      width: 44px;
      height: 42px;
      border: 1px solid var(--rl-border-strong);
      border-radius: 14px;
      padding: 0;
      box-shadow: none !important;
      display: inline-flex;
      align-items: center;
      justify-content: center;
      background: #fff;
    }

    .navbar-toggler-icon-custom {
      width: 18px;
      height: 12px;
      position: relative;
      display: inline-block;
      border-top: 2px solid var(--rl-primary);
      border-bottom: 2px solid var(--rl-primary);
    }

    .navbar-toggler-icon-custom::after {
      content: "";
      position: absolute;
      left: 0;
      right: 0;
      top: 4px;
      height: 2px;
      background: var(--rl-primary);
      border-radius: var(--rl-radius-pill);
    }

    .section {
      padding: var(--rl-section) 0;
      position: relative;
    }

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

    .eyebrow {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      padding: 7px 12px;
      border-radius: var(--rl-radius-pill);
      color: var(--rl-primary-dark);
      background: rgba(37, 99, 235, .08);
      border: 1px solid var(--rl-border);
      font-size: 13px;
      font-weight: 800;
      margin-bottom: 16px;
    }

    .eyebrow::before {
      content: "";
      width: 7px;
      height: 7px;
      border-radius: 50%;
      background: var(--rl-accent);
      box-shadow: 0 0 0 5px rgba(56, 189, 248, .13);
    }

    .section-title {
      font-size: clamp(28px, 4vw, 38px);
      margin-bottom: 14px;
    }

    .section-desc {
      font-size: 16.5px;
      max-width: 760px;
      margin-bottom: 0;
    }

    .btn {
      border-radius: var(--rl-radius-pill);
      font-weight: 800;
      padding: 12px 20px;
      border-width: 1px;
      transition: transform .22s var(--rl-ease), box-shadow .22s var(--rl-ease), background-color .22s var(--rl-ease), border-color .22s var(--rl-ease);
    }

    .btn-primary {
      color: #fff;
      background: linear-gradient(135deg, var(--rl-primary), var(--rl-primary-dark));
      border-color: rgba(37, 99, 235, .2);
      box-shadow: 0 16px 34px rgba(37, 99, 235, .24);
    }

    .btn-primary:hover,
    .btn-primary:active {
      color: #fff !important;
      background: linear-gradient(135deg, var(--rl-primary-dark), #1e40af) !important;
      border-color: rgba(29, 78, 216, .4) !important;
      transform: translateY(-2px);
      box-shadow: 0 22px 42px rgba(37, 99, 235, .30);
    }

    .btn-outline-primary {
      color: var(--rl-primary-dark);
      background: rgba(255, 255, 255, .78);
      border-color: var(--rl-border-strong);
      box-shadow: 0 10px 24px rgba(15, 23, 42, .04);
    }

    .btn-outline-primary:hover,
    .btn-outline-primary:active {
      color: var(--rl-primary-dark) !important;
      background: var(--rl-primary-soft) !important;
      border-color: rgba(37, 99, 235, .32) !important;
      transform: translateY(-2px);
    }

    .badge-soft {
      display: inline-flex;
      align-items: center;
      gap: 6px;
      padding: 6px 11px;
      color: var(--rl-primary-dark);
      background: rgba(37, 99, 235, .08);
      border: 1px solid var(--rl-border);
      border-radius: var(--rl-radius-pill);
      font-size: 13px;
      font-weight: 800;
      line-height: 1;
    }

    .hero {
      padding: 84px 0 52px;
      overflow: hidden;
    }

    .hero::before {
      content: "";
      position: absolute;
      width: 680px;
      height: 680px;
      right: -220px;
      top: -260px;
      background: radial-gradient(circle, rgba(56, 189, 248, .20), transparent 64%);
      pointer-events: none;
    }

    .hero-layout {
      align-items: center;
      row-gap: 42px;
    }

    .hero-copy {
      position: relative;
      z-index: 2;
    }

    .hero h1 {
      font-size: clamp(34px, 5vw, 55px);
      line-height: 1.12;
      margin-bottom: 22px;
    }

    .hero-lead {
      font-size: 17.5px;
      line-height: 1.86;
      color: #475569;
      max-width: 610px;
      margin-bottom: 26px;
    }

    .hero-actions {
      display: flex;
      flex-wrap: wrap;
      align-items: center;
      gap: 14px;
      margin-bottom: 26px;
    }

    .hero-kpis {
      display: grid;
      grid-template-columns: repeat(3, minmax(0, 1fr));
      gap: 12px;
      max-width: 620px;
    }

    .hero-kpi {
      padding: 14px 15px;
      background: rgba(255, 255, 255, .78);
      border: 1px solid var(--rl-border);
      border-radius: 18px;
      box-shadow: 0 12px 30px rgba(37, 99, 235, .07);
    }

    .hero-kpi strong {
      display: block;
      font-size: 20px;
      line-height: 1.1;
      color: var(--rl-primary-dark);
      margin-bottom: 5px;
      letter-spacing: -.03em;
    }

    .hero-kpi span {
      display: block;
      color: var(--rl-muted);
      font-size: 13px;
      font-weight: 700;
    }

    .dp-cover-wrap {
      position: relative;
      min-height: 488px;
      transform: rotate(-1.5deg);
    }

    .dp-cover {
      position: relative;
      min-height: 488px;
      border-radius: 36px;
      padding: 28px;
      background:
        linear-gradient(145deg, rgba(255, 255, 255, .96), rgba(234, 244, 255, .92)),
        radial-gradient(circle at 80% 20%, rgba(56, 189, 248, .24), transparent 36%);
      border: 1px solid rgba(37, 99, 235, .16);
      box-shadow: var(--rl-shadow-lg);
      overflow: hidden;
      transform: translateX(18px);
    }

    .dp-cover::before {
      content: "";
      position: absolute;
      inset: 18px;
      border-radius: 28px;
      background-image:
        linear-gradient(rgba(37, 99, 235, .07) 1px, transparent 1px),
        linear-gradient(90deg, rgba(37, 99, 235, .07) 1px, transparent 1px);
      background-size: 34px 34px;
      mask-image: linear-gradient(145deg, #000 30%, transparent 82%);
      opacity: .75;
    }

    .dp-cover::after {
      content: "";
      position: absolute;
      width: 260px;
      height: 260px;
      right: -58px;
      bottom: -70px;
      background: radial-gradient(circle, rgba(37, 99, 235, .18), transparent 68%);
      pointer-events: none;
    }

    .cover-topline {
      position: relative;
      z-index: 2;
      display: flex;
      justify-content: space-between;
      gap: 16px;
      align-items: center;
      margin-bottom: 28px;
    }

    .cover-title {
      font-size: 17px;
      font-weight: 900;
      color: var(--rl-text);
    }

    .cover-pulse {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      padding: 8px 12px;
      border-radius: var(--rl-radius-pill);
      background: rgba(236, 254, 255, .86);
      border: 1px solid rgba(56, 189, 248, .26);
      color: #0369a1;
      font-size: 13px;
      font-weight: 800;
    }

    .cover-pulse i {
      width: 8px;
      height: 8px;
      border-radius: 50%;
      background: #22c55e;
      box-shadow: 0 0 0 6px rgba(34, 197, 94, .14);
      display: inline-block;
    }

    .cover-main {
      position: relative;
      z-index: 2;
      display: grid;
      grid-template-columns: 1.1fr .9fr;
      gap: 18px;
      align-items: stretch;
    }

    .cover-panel {
      border-radius: 26px;
      background: rgba(255, 255, 255, .80);
      border: 1px solid rgba(37, 99, 235, .12);
      box-shadow: 0 16px 38px rgba(37, 99, 235, .08);
      padding: 22px;
      transform: rotate(1.5deg);
    }

    .cover-panel.primary {
      min-height: 294px;
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }

    .cover-panel h3 {
      font-size: 21px;
      margin-bottom: 10px;
    }

    .cover-panel p {
      font-size: 14.5px;
      margin-bottom: 16px;
    }

    .status-line {
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 12px;
      padding: 12px 0;
      border-top: 1px solid rgba(226, 232, 240, .84);
    }

    .status-line:first-of-type {
      border-top: 0;
    }

    .status-line span {
      color: var(--rl-muted);
      font-size: 13px;
      font-weight: 700;
    }

    .status-line strong {
      color: var(--rl-text);
      font-size: 14px;
      font-weight: 900;
    }

    .signal-bar {
      height: 10px;
      border-radius: var(--rl-radius-pill);
      background: rgba(37, 99, 235, .10);
      overflow: hidden;
      margin-top: 18px;
    }

    .signal-bar em {
      display: block;
      width: 74%;
      height: 100%;
      border-radius: inherit;
      background: linear-gradient(90deg, var(--rl-primary), var(--rl-accent));
    }

    .mini-stack {
      display: grid;
      gap: 14px;
    }

    .mini-card {
      padding: 16px;
      border-radius: 20px;
      background: linear-gradient(180deg, #fff, #f6fbff);
      border: 1px solid rgba(37, 99, 235, .12);
    }

    .mini-card b {
      display: block;
      font-size: 14px;
      margin-bottom: 4px;
    }

    .mini-card small {
      color: var(--rl-muted);
      font-weight: 700;
    }

    .diagnosis-grid {
      display: grid;
      grid-template-columns: 1fr 1.2fr 1fr;
      gap: 18px;
      align-items: stretch;
      margin-top: 34px;
    }

    .diagnosis-card,
    .info-card,
    .reward-card,
    .timeline-card,
    .article-card,
    .recommend-card,
    .review-card,
    .catalog-card {
      background: rgba(255, 255, 255, .88);
      border: 1px solid var(--rl-border);
      border-radius: var(--rl-radius);
      box-shadow: var(--rl-shadow);
      transition: transform .24s var(--rl-ease), box-shadow .24s var(--rl-ease), border-color .24s var(--rl-ease);
    }

    .diagnosis-card:hover,
    .info-card:hover,
    .reward-card:hover,
    .timeline-card:hover,
    .article-card:hover,
    .recommend-card:hover,
    .review-card:hover,
    .catalog-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--rl-shadow-lg);
      border-color: rgba(37, 99, 235, .22);
    }

    .diagnosis-card {
      padding: 24px;
      min-height: 210px;
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }

    .diagnosis-card.featured {
      min-height: 250px;
      background:
        linear-gradient(145deg, rgba(255, 255, 255, .98), rgba(234, 244, 255, .86)),
        radial-gradient(circle at 80% 20%, rgba(56, 189, 248, .18), transparent 42%);
    }

    .card-index {
      width: 42px;
      height: 42px;
      border-radius: 16px;
      display: inline-flex;
      align-items: center;
      justify-content: center;
      color: var(--rl-primary-dark);
      background: var(--rl-primary-soft);
      border: 1px solid var(--rl-border);
      font-weight: 900;
      margin-bottom: 18px;
    }

    .diagnosis-card h3,
    .info-card h3,
    .reward-card h3,
    .timeline-card h3,
    .recommend-card h3,
    .catalog-card h3 {
      font-size: 20px;
      margin-bottom: 10px;
    }

    .diagnosis-card p,
    .info-card p,
    .reward-card p,
    .timeline-card p,
    .recommend-card p,
    .catalog-card p {
      font-size: 15px;
      margin-bottom: 0;
    }

    .status-dot {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      color: #0369a1;
      font-size: 13px;
      font-weight: 800;
      margin-top: 18px;
    }

    .status-dot::before {
      content: "";
      width: 8px;
      height: 8px;
      border-radius: 50%;
      background: var(--rl-accent);
    }

    .playway {
      background:
        linear-gradient(180deg, rgba(234, 244, 255, .52), rgba(255, 255, 255, .86));
    }

    .playway-board {
      margin-top: 36px;
      display: grid;
      grid-template-columns: .92fr 1.08fr;
      gap: 22px;
      align-items: stretch;
    }

    .step-rail {
      padding: 28px;
      border-radius: var(--rl-radius-lg);
      background: var(--rl-surface);
      border: 1px solid var(--rl-border);
      box-shadow: var(--rl-shadow);
      position: relative;
      overflow: hidden;
    }

    .step-rail::after {
      content: "";
      position: absolute;
      width: 220px;
      height: 220px;
      left: -88px;
      bottom: -102px;
      background: radial-gradient(circle, rgba(56, 189, 248, .17), transparent 67%);
    }

    .step-item {
      position: relative;
      z-index: 2;
      display: grid;
      grid-template-columns: 48px 1fr;
      gap: 16px;
      padding: 18px 0;
      border-bottom: 1px solid rgba(226, 232, 240, .72);
    }

    .step-item:last-child {
      border-bottom: 0;
      padding-bottom: 0;
    }

    .step-num {
      width: 48px;
      height: 48px;
      border-radius: 18px;
      display: inline-flex;
      align-items: center;
      justify-content: center;
      color: #fff;
      background: linear-gradient(135deg, var(--rl-primary), var(--rl-accent));
      font-weight: 900;
      box-shadow: 0 14px 26px rgba(37, 99, 235, .20);
    }

    .step-item h3 {
      font-size: 18px;
      margin-bottom: 5px;
    }

    .step-item p {
      font-size: 14.5px;
      margin-bottom: 0;
    }

    .info-matrix {
      display: grid;
      grid-template-columns: repeat(2, minmax(0, 1fr));
      gap: 18px;
    }

    .info-card {
      padding: 24px;
      min-height: 185px;
    }

    .info-icon {
      width: 42px;
      height: 42px;
      border-radius: 15px;
      display: inline-flex;
      align-items: center;
      justify-content: center;
      color: var(--rl-primary-dark);
      background: rgba(37, 99, 235, .08);
      border: 1px solid var(--rl-border);
      font-weight: 900;
      margin-bottom: 18px;
    }

    .reward-grid {
      margin-top: 34px;
      display: grid;
      grid-template-columns: 1.15fr .85fr;
      gap: 22px;
      align-items: stretch;
    }

    .reward-card {
      padding: 28px;
      overflow: hidden;
      position: relative;
    }

    .reward-card.large {
      background:
        linear-gradient(145deg, #fff 0%, #f1f8ff 100%);
    }

    .reward-card.large::after {
      content: "";
      position: absolute;
      width: 280px;
      height: 280px;
      right: -110px;
      top: -100px;
      background: radial-gradient(circle, rgba(37, 99, 235, .14), transparent 66%);
      pointer-events: none;
    }

    .reward-list {
      display: grid;
      gap: 13px;
      margin-top: 22px;
      padding: 0;
      list-style: none;
    }

    .reward-list li {
      display: flex;
      align-items: flex-start;
      gap: 12px;
      padding: 14px;
      border-radius: 18px;
      background: rgba(255, 255, 255, .74);
      border: 1px solid rgba(37, 99, 235, .10);
      color: #334155;
      font-weight: 700;
      line-height: 1.55;
    }

    .reward-list li::before {
      content: "✓";
      width: 24px;
      height: 24px;
      flex: 0 0 auto;
      border-radius: 50%;
      display: inline-flex;
      align-items: center;
      justify-content: center;
      color: #fff;
      background: var(--rl-primary);
      font-size: 13px;
      font-weight: 900;
      margin-top: 1px;
    }

    .metric-stack {
      display: grid;
      gap: 16px;
    }

    .metric-card {
      padding: 22px;
      border-radius: var(--rl-radius);
      background: #fff;
      border: 1px solid var(--rl-border);
      box-shadow: 0 15px 36px rgba(37, 99, 235, .08);
    }

    .metric-card strong {
      display: block;
      color: var(--rl-primary-dark);
      font-size: 30px;
      letter-spacing: -.05em;
      line-height: 1;
      margin-bottom: 8px;
    }

    .metric-card span {
      color: var(--rl-muted);
      font-weight: 700;
      font-size: 14px;
    }

    .progress-section {
      background:
        radial-gradient(circle at 16% 18%, rgba(56, 189, 248, .12), transparent 30%),
        linear-gradient(180deg, #ffffff, #f7fbff);
    }

    .timeline-wrap {
      margin-top: 36px;
      display: grid;
      grid-template-columns: repeat(4, minmax(0, 1fr));
      gap: 18px;
      counter-reset: task;
    }

    .timeline-card {
      padding: 24px;
      position: relative;
      overflow: hidden;
    }

    .timeline-card::before {
      counter-increment: task;
      content: "0" counter(task);
      display: inline-flex;
      width: 46px;
      height: 46px;
      align-items: center;
      justify-content: center;
      border-radius: 17px;
      background: rgba(37, 99, 235, .08);
      color: var(--rl-primary-dark);
      font-weight: 900;
      margin-bottom: 20px;
    }

    .timeline-card::after {
      content: "";
      position: absolute;
      height: 2px;
      left: 72px;
      right: -18px;
      top: 47px;
      background: linear-gradient(90deg, rgba(37, 99, 235, .20), transparent);
    }

    .updates {
      background: linear-gradient(180deg, rgba(234, 244, 255, .38), rgba(255, 255, 255, .92));
    }

    .updates-layout {
      margin-top: 36px;
      display: grid;
      grid-template-columns: 1fr 330px;
      gap: 24px;
      align-items: start;
    }

    .article-list {
      display: grid;
      grid-template-columns: repeat(2, minmax(0, 1fr));
      gap: 18px;
    }

    .article-card {
      padding: 24px;
      min-height: 246px;
      display: flex;
      flex-direction: column;
    }

    .article-card h3 {
      font-size: 19px;
      margin: 16px 0 10px;
      line-height: 1.35;
      display: -webkit-box;
      -webkit-line-clamp: 2;
      -webkit-box-orient: vertical;
      overflow: hidden;
    }

    .article-card p {
      font-size: 14.5px;
      line-height: 1.7;
      display: -webkit-box;
      -webkit-line-clamp: 3;
      -webkit-box-orient: vertical;
      overflow: hidden;
      margin-bottom: 18px;
    }

    .article-meta {
      margin-top: auto;
      padding-top: 16px;
      border-top: 1px solid rgba(226, 232, 240, .82);
      display: flex;
      justify-content: space-between;
      align-items: center;
      gap: 12px;
      color: var(--rl-muted);
      font-size: 13px;
      font-weight: 800;
    }

    .detail-link {
      color: var(--rl-primary-dark);
      font-weight: 900;
      white-space: nowrap;
    }

    .detail-link:hover {
      color: var(--rl-primary);
      transform: translateX(2px);
    }

    .updates-side {
      position: sticky;
      top: 104px;
      padding: 26px;
      border-radius: var(--rl-radius-lg);
      background: #fff;
      border: 1px solid var(--rl-border);
      box-shadow: var(--rl-shadow);
    }

    .updates-side h3 {
      font-size: 21px;
      margin-bottom: 14px;
    }

    .side-list {
      padding: 0;
      margin: 20px 0 0;
      list-style: none;
      display: grid;
      gap: 12px;
    }

    .side-list li {
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 12px;
      padding: 12px 14px;
      border-radius: 16px;
      background: var(--rl-surface-2);
      color: #334155;
      font-size: 14px;
      font-weight: 800;
    }

    .side-list li span {
      color: var(--rl-primary-dark);
      font-size: 12px;
    }

    .empty-state {
      grid-column: 1 / -1;
      padding: 42px 24px;
      border-radius: var(--rl-radius-lg);
      background:
        radial-gradient(circle at 50% 0%, rgba(56, 189, 248, .16), transparent 42%),
        #fff;
      border: 1px dashed rgba(37, 99, 235, .28);
      box-shadow: var(--rl-shadow);
      text-align: center;
    }

    .empty-icon {
      width: 64px;
      height: 64px;
      margin: 0 auto 16px;
      border-radius: 24px;
      background: linear-gradient(135deg, rgba(37, 99, 235, .12), rgba(56, 189, 248, .16));
      border: 1px solid var(--rl-border);
      display: flex;
      align-items: center;
      justify-content: center;
      color: var(--rl-primary-dark);
      font-weight: 900;
      font-size: 24px;
    }

    .recommend-track {
      margin-top: 36px;
      display: grid;
      grid-template-columns: .9fr 1.1fr 1fr;
      gap: 18px;
    }

    .recommend-card {
      padding: 25px;
      min-height: 210px;
    }

    .recommend-card .badge-soft {
      margin-bottom: 18px;
    }

    .catalog-strip {
      margin-top: 34px;
      display: grid;
      grid-template-columns: repeat(3, minmax(0, 1fr));
      gap: 18px;
    }

    .catalog-card {
      padding: 25px;
      background:
        linear-gradient(145deg, rgba(255, 255, 255, .96), rgba(246, 250, 255, .96));
    }

    .catalog-top {
      display: flex;
      justify-content: space-between;
      gap: 12px;
      align-items: flex-start;
      margin-bottom: 18px;
    }

    .catalog-count {
      padding: 6px 10px;
      border-radius: var(--rl-radius-pill);
      color: var(--rl-primary-dark);
      background: rgba(37, 99, 235, .08);
      font-size: 12px;
      font-weight: 900;
      white-space: nowrap;
    }

    .reviews {
      background: linear-gradient(180deg, #fff, #f8fbff);
    }

    .review-wall {
      margin-top: 36px;
      display: grid;
      grid-template-columns: 360px 1fr;
      gap: 22px;
      align-items: stretch;
    }

    .rating-summary {
      padding: 30px;
      border-radius: var(--rl-radius-lg);
      background:
        linear-gradient(145deg, var(--rl-primary), #1e40af);
      box-shadow: var(--rl-shadow-lg);
      color: #fff;
      position: relative;
      overflow: hidden;
    }

    .rating-summary::after {
      content: "";
      position: absolute;
      width: 260px;
      height: 260px;
      right: -110px;
      bottom: -130px;
      background: radial-gradient(circle, rgba(255, 255, 255, .28), transparent 68%);
    }

    .rating-summary h3 {
      color: #fff;
      font-size: 24px;
      margin-bottom: 12px;
    }

    .rating-summary p {
      color: rgba(255, 255, 255, .78);
      margin-bottom: 24px;
    }

    .rating-number {
      font-size: 54px;
      line-height: 1;
      font-weight: 900;
      letter-spacing: -.06em;
      margin-bottom: 8px;
    }

    .review-grid {
      display: grid;
      grid-template-columns: repeat(2, minmax(0, 1fr));
      gap: 18px;
    }

    .review-card {
      padding: 24px;
      min-height: 220px;
    }

    .review-head {
      display: flex;
      gap: 14px;
      align-items: center;
      margin-bottom: 16px;
    }

    .avatar {
      width: 44px;
      height: 44px;
      border-radius: 16px;
      display: flex;
      align-items: center;
      justify-content: center;
      color: #fff;
      background: linear-gradient(135deg, var(--rl-primary), var(--rl-accent));
      font-weight: 900;
      box-shadow: 0 14px 26px rgba(37, 99, 235, .18);
      flex: 0 0 auto;
    }

    .review-card h3 {
      font-size: 18px;
      margin-bottom: 10px;
    }

    .review-card p {
      font-size: 15px;
      line-height: 1.82;
      margin-bottom: 16px;
    }

    .review-meta {
      display: flex;
      gap: 8px;
      flex-wrap: wrap;
    }

    .review-meta .badge-soft {
      font-size: 12px;
      padding: 5px 10px;
    }

    .faq-wrap {
      margin-top: 36px;
    }

    .accordion-item {
      border: 0;
      background: transparent;
      margin-bottom: 14px;
    }

    .accordion-button {
      background: #fff;
      border: 1px solid var(--rl-border);
      box-shadow: var(--rl-shadow);
      border-radius: 20px !important;
      padding: 18px 22px;
      font-weight: 800;
      color: var(--rl-text);
    }

    .accordion-button:not(.collapsed) {
      background: var(--rl-primary-soft);
      color: var(--rl-primary-dark);
      box-shadow: var(--rl-shadow);
    }

    .accordion-button::after {
      width: 1rem;
      height: 1rem;
      background-size: 1rem;
      filter: hue-rotate(185deg) saturate(1.4);
    }

    .accordion-button:focus {
      box-shadow: none;
      border-color: rgba(37, 99, 235, .24);
    }

    .accordion-collapse {
      border-radius: 0 0 20px 20px;
    }

    .accordion-body {
      padding: 0 22px 20px;
      color: var(--rl-muted);
      background: #fff;
      border: 1px solid var(--rl-border);
      border-top: 0;
      border-radius: 0 0 20px 20px;
      margin-top: -8px;
      box-shadow: var(--rl-shadow);
    }

    .cta-wrap {
      padding-bottom: 104px;
    }

    .cta-box {
      position: relative;
      padding: 34px;
      border-radius: 34px;
      background: linear-gradient(145deg, rgba(37, 99, 235, .98), #1d4ed8);
      color: #fff;
      box-shadow: var(--rl-shadow-lg);
      overflow: hidden;
    }

    .cta-box::before {
      content: "";
      position: absolute;
      inset: 0;
      background:
        radial-gradient(circle at 84% 18%, rgba(255, 255, 255, .18), transparent 24%),
        radial-gradient(circle at 18% 80%, rgba(56, 189, 248, .18), transparent 26%);
      pointer-events: none;
    }

    .cta-box > * {
      position: relative;
      z-index: 1;
    }

    .cta-box h2 {
      color: #fff;
      font-size: clamp(28px, 4vw, 40px);
      margin-bottom: 12px;
    }

    .cta-box p {
      color: rgba(255, 255, 255, .80);
      font-size: 16.5px;
      max-width: 760px;
      margin-bottom: 22px;
    }

    .cta-actions {
      display: flex;
      flex-wrap: wrap;
      gap: 14px;
      align-items: center;
    }

    .cta-box .btn-light {
      color: var(--rl-primary-dark);
      background: #fff;
      border: 1px solid rgba(255, 255, 255, .64);
      box-shadow: 0 14px 28px rgba(15, 23, 42, .12);
    }

    .cta-box .btn-light:hover {
      transform: translateY(-2px);
      background: #f8fbff;
    }

    .site-footer {
      background: linear-gradient(180deg, #f7fbff, #eef5ff);
      border-top: 1px solid rgba(226, 232, 240, .92);
      padding: 34px 0 24px;
    }

    .footer-top {
      padding: 28px;
      border-radius: 28px;
      border: 1px solid rgba(37, 99, 235, .10);
      background: #fff;
      box-shadow: var(--rl-shadow);
    }

    .footer-grid {
      display: grid;
      grid-template-columns: 1.4fr .8fr .8fr;
      gap: 22px;
      align-items: start;
    }

    .footer-brand {
      display: flex;
      align-items: center;
      gap: 12px;
      margin-bottom: 14px;
      font-weight: 900;
      font-size: 18px;
      color: var(--rl-text);
    }

    .footer-text {
      margin-bottom: 18px;
      max-width: 560px;
    }

    .footer-title {
      font-size: 17px;
      margin-bottom: 16px;
    }

    .footer-links {
      list-style: none;
      padding: 0;
      margin: 0;
      display: grid;
      gap: 10px;
    }

    .footer-links a {
      color: #475569;
      font-weight: 700;
    }

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

    .footer-bottom {
      display: flex;
      justify-content: space-between;
      align-items: center;
      gap: 12px;
      padding-top: 18px;
      margin-top: 18px;
      border-top: 1px solid rgba(226, 232, 240, .88);
      color: var(--rl-muted);
      font-size: 13px;
      flex-wrap: wrap;
    }

    .backtop {
      color: var(--rl-primary-dark);
      font-weight: 800;
    }

    .backtop:hover {
      color: var(--rl-primary);
    }

    @media (max-width: 1199.98px) {
      :root {
        --rl-section: 92px;
      }

      .hero {
        padding-top: 76px;
      }

      .hero h1 {
        font-size: clamp(32px, 5vw, 50px);
      }

      .cover-main,
      .playway-board,
      .reward-grid,
      .updates-layout,
      .review-wall,
      .footer-grid {
        grid-template-columns: 1fr;
      }

      .dp-cover-wrap {
        min-height: auto;
      }

      .dp-cover {
        transform: none;
      }

      .timeline-wrap {
        grid-template-columns: repeat(2, minmax(0, 1fr));
      }

      .article-list,
      .info-matrix,
      .recommend-track,
      .catalog-strip,
      .review-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
      }

      .updates-side {
        position: static;
      }
    }

    @media (max-width: 991.98px) {
      .navbar-collapse {
        margin-top: 12px;
        padding: 14px;
        border-radius: 22px;
        background: #fff;
        border: 1px solid rgba(37, 99, 235, .12);
        box-shadow: var(--rl-shadow);
      }

      .navbar-nav {
        align-items: stretch;
        gap: 8px;
      }

      .nav-link {
        width: 100%;
      }

      .diagnosis-grid,
      .hero-kpis {
        grid-template-columns: 1fr;
      }

      .cover-panel {
        transform: none;
      }

      .hero {
        padding-top: 68px;
      }
    }

    @media (max-width: 767.98px) {
      :root {
        --rl-section: 70px;
      }

      .container {
        padding-left: 18px;
        padding-right: 18px;
      }

      .navbar {
        min-height: 68px;
      }

      .navbar-brand {
        font-size: 16px;
        max-width: 78%;
      }

      .brand-mark {
        width: 38px;
        height: 38px;
        border-radius: 14px;
      }

      .hero {
        padding-top: 56px;
      }

      .hero h1 {
        font-size: clamp(30px, 8vw, 38px);
      }

      .hero-lead,
      .section-desc,
      .cta-box p,
      .footer-text,
      .review-card p,
      .article-card p {
        font-size: 15px;
      }

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

      .hero-actions .btn,
      .cta-actions .btn {
        width: 100%;
      }

      .hero-kpis,
      .timeline-wrap,
      .article-list,
      .info-matrix,
      .recommend-track,
      .catalog-strip,
      .review-grid {
        grid-template-columns: 1fr;
      }

      .diagnosis-card,
      .info-card,
      .reward-card,
      .timeline-card,
      .article-card,
      .recommend-card,
      .catalog-card,
      .review-card,
      .footer-top,
      .cta-box,
      .step-rail,
      .updates-side {
        padding: 22px;
        border-radius: 24px;
      }

      .cover-main {
        gap: 14px;
      }

      .dp-cover {
        min-height: auto;
        padding: 20px;
      }

      .dp-cover::before {
        inset: 12px;
      }

      .cover-topline {
        flex-direction: column;
        align-items: flex-start;
      }

      .signal-bar {
        margin-top: 14px;
      }

      .footer-bottom {
        flex-direction: column;
        align-items: flex-start;
      }

      .accordion-button,
      .accordion-body {
        padding-left: 18px;
        padding-right: 18px;
      }
    }

    @media (max-width: 575.98px) {
      .section {
        padding: 58px 0;
      }

      .section-title {
        font-size: 28px;
      }

      .hero h1 {
        font-size: 32px;
      }

      .hero-lead {
        font-size: 14.5px;
      }

      .hero-kpi,
      .diagnosis-card,
      .info-card,
      .reward-card,
      .timeline-card,
      .article-card,
      .recommend-card,
      .catalog-card,
      .review-card,
      .footer-top,
      .cta-box,
      .step-rail,
      .updates-side {
        padding: 18px;
      }

      .badge-soft,
      .eyebrow {
        font-size: 12px;
      }

      .hero-kpi strong,
      .metric-card strong {
        font-size: 24px;
      }

      .cta-box h2 {
        font-size: 26px;
      }

      .article-card h3,
      .recommend-card h3,
      .catalog-card h3,
      .review-card h3,
      .step-item h3 {
        font-size: 17px;
      }
    }
  /style>
<link rel="stylesheet" href="/assets/css/style.css">
<style id="roulang-fallback-style">
  body{font-family:"Microsoft YaHei",system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;line-height:1.7;color:#1f2937;background:#f7f9fc}
  header,footer{background:#0f172a;color:#fff} header a,footer a{color:inherit;text-decoration:none}
  main section{padding:64px 0} .container{max-width:1180px}
  .hero,.site-hero{background:linear-gradient(135deg,#0f172a,#1d4ed8);color:#fff}
  .card,.feature-card,.service-card,.category-card{border:1px solid rgba(15,23,42,.08);box-shadow:0 12px 32px rgba(15,23,42,.08);border-radius:16px}
  .btn,.button,a[class*="btn"]{border-radius:999px;font-weight:700}
  img{max-width:100%;height:auto} @media(max-width:768px){main section{padding:42px 0} h1{font-size:2rem}}

/* roulang page: article */
:root {
      --rl-primary: #2563eb;
      --rl-primary-dark: #1d4ed8;
      --rl-primary-soft: #eaf4ff;
      --rl-accent: #38bdf8;
      --rl-cyan-soft: #ecfeff;
      --rl-bg: #f8fbff;
      --rl-surface: #ffffff;
      --rl-surface-2: #f1f7ff;
      --rl-text: #0f172a;
      --rl-muted: #64748b;
      --rl-muted-2: #94a3b8;
      --rl-border: rgba(37, 99, 235, .12);
      --rl-border-strong: rgba(37, 99, 235, .22);
      --rl-shadow: 0 18px 48px rgba(37, 99, 235, .10);
      --rl-shadow-lg: 0 28px 70px rgba(37, 99, 235, .16);
      --rl-radius-sm: 14px;
      --rl-radius: 22px;
      --rl-radius-lg: 30px;
      --rl-radius-pill: 999px;
      --rl-container: 1220px;
      --rl-ease: cubic-bezier(.22, 1, .36, 1);
      --rl-section: 104px;
    }

    * {
      box-sizing: border-box;
    }

    html {
      scroll-behavior: smooth;
      scroll-padding-top: 92px;
    }

    body {
      margin: 0;
      font-family: system-ui, -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", "Noto Sans SC", Arial, sans-serif;
      color: var(--rl-text);
      background:
        radial-gradient(circle at 8% 6%, rgba(56, 189, 248, .18), transparent 32%),
        radial-gradient(circle at 88% 16%, rgba(37, 99, 235, .12), transparent 30%),
        linear-gradient(180deg, #ffffff 0%, var(--rl-bg) 42%, #ffffff 100%);
      line-height: 1.75;
      overflow-x: hidden;
      text-rendering: optimizeLegibility;
      -webkit-font-smoothing: antialiased;
    }

    a {
      color: inherit;
      text-decoration: none;
      transition: color .22s var(--rl-ease), background-color .22s var(--rl-ease), border-color .22s var(--rl-ease), transform .22s var(--rl-ease), box-shadow .22s var(--rl-ease);
    }

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

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

    ul,
    ol {
      padding-left: 1.25rem;
    }

    button,
    input,
    textarea,
    select {
      font: inherit;
    }

    button:focus-visible,
    a:focus-visible,
    input:focus-visible,
    textarea:focus-visible {
      outline: 3px solid rgba(56, 189, 248, .34);
      outline-offset: 3px;
      border-radius: 12px;
    }

    .container {
      max-width: var(--rl-container);
      padding-left: 24px;
      padding-right: 24px;
    }

    .site-header {
      position: sticky;
      top: 0;
      z-index: 1030;
      background: rgba(255, 255, 255, .92);
      border-bottom: 1px solid rgba(226, 232, 240, .82);
      backdrop-filter: blur(14px);
      transition: box-shadow .25s var(--rl-ease), background-color .25s var(--rl-ease);
    }

    .site-header.is-scrolled {
      box-shadow: 0 14px 38px rgba(15, 23, 42, .08);
      background: rgba(255, 255, 255, .97);
    }

    .navbar {
      min-height: 78px;
      padding: 0;
    }

    .navbar-brand {
      display: inline-flex;
      align-items: center;
      gap: 12px;
      color: var(--rl-text);
      font-size: 18px;
      font-weight: 800;
      letter-spacing: -.02em;
      max-width: 72%;
      white-space: normal;
      line-height: 1.28;
    }

    .navbar-brand:hover {
      color: var(--rl-text);
      transform: translateY(-1px);
    }

    .brand-mark {
      width: 42px;
      height: 42px;
      border-radius: 15px;
      background:
        linear-gradient(135deg, rgba(37, 99, 235, .98), rgba(56, 189, 248, .92)),
        radial-gradient(circle at 30% 20%, rgba(255, 255, 255, .55), transparent 34%);
      box-shadow: 0 14px 30px rgba(37, 99, 235, .22);
      position: relative;
      flex: 0 0 auto;
    }

    .brand-mark::before,
    .brand-mark::after {
      content: "";
      position: absolute;
      border-radius: var(--rl-radius-pill);
      background: rgba(255, 255, 255, .9);
    }

    .brand-mark::before {
      width: 18px;
      height: 4px;
      left: 12px;
      top: 13px;
      box-shadow: 0 8px 0 rgba(255, 255, 255, .66);
    }

    .brand-mark::after {
      width: 7px;
      height: 7px;
      right: 10px;
      bottom: 10px;
    }

    .navbar-nav {
      align-items: center;
      gap: 10px;
    }

    .nav-link {
      position: relative;
      color: #334155;
      font-size: 15px;
      font-weight: 700;
      padding: 10px 16px !important;
      border-radius: var(--rl-radius-pill);
    }

    .nav-link:hover {
      color: var(--rl-primary);
      background: rgba(37, 99, 235, .06);
    }

    .nav-link.active {
      color: var(--rl-primary);
      background: rgba(37, 99, 235, .08);
    }

    .nav-link.active::after {
      content: "";
      position: absolute;
      left: 18px;
      right: 18px;
      bottom: 5px;
      height: 2px;
      border-radius: var(--rl-radius-pill);
      background: linear-gradient(90deg, var(--rl-primary), var(--rl-accent));
    }

    .navbar-toggler {
      width: 44px;
      height: 42px;
      border: 1px solid var(--rl-border-strong);
      border-radius: 14px;
      padding: 0;
      box-shadow: none !important;
      display: inline-flex;
      align-items: center;
      justify-content: center;
      background: #fff;
    }

    .navbar-toggler:hover,
    .navbar-toggler:focus {
      background: var(--rl-primary-soft);
      border-color: rgba(37, 99, 235, .34);
    }

    .navbar-toggler-icon-custom {
      width: 18px;
      height: 12px;
      position: relative;
      display: inline-block;
      border-top: 2px solid var(--rl-primary);
      border-bottom: 2px solid var(--rl-primary);
    }

    .navbar-toggler-icon-custom::after {
      content: "";
      position: absolute;
      left: 0;
      right: 0;
      top: 4px;
      height: 2px;
      background: var(--rl-primary);
      border-radius: var(--rl-radius-pill);
    }

    .section {
      padding: var(--rl-section) 0;
      position: relative;
    }

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

    .eyebrow {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      padding: 7px 12px;
      border-radius: var(--rl-radius-pill);
      color: var(--rl-primary-dark);
      background: rgba(37, 99, 235, .08);
      border: 1px solid var(--rl-border);
      font-size: 13px;
      font-weight: 800;
      margin-bottom: 16px;
    }

    .eyebrow::before {
      content: "";
      width: 7px;
      height: 7px;
      border-radius: 50%;
      background: var(--rl-accent);
      box-shadow: 0 0 0 5px rgba(56, 189, 248, .13);
    }

    .section-title {
      font-size: clamp(28px, 4vw, 38px);
      margin-bottom: 14px;
      font-weight: 800;
      letter-spacing: -.035em;
      line-height: 1.18;
    }

    .section-desc {
      font-size: 16.5px;
      max-width: 760px;
      margin-bottom: 0;
      color: var(--rl-muted);
    }

    .btn {
      border-radius: var(--rl-radius-pill);
      font-weight: 800;
      padding: 12px 20px;
      border-width: 1px;
      transition: transform .22s var(--rl-ease), box-shadow .22s var(--rl-ease), background-color .22s var(--rl-ease), border-color .22s var(--rl-ease), color .22s var(--rl-ease);
    }

    .btn-primary {
      color: #fff;
      background: linear-gradient(135deg, var(--rl-primary), var(--rl-primary-dark));
      border-color: transparent;
      box-shadow: 0 16px 30px rgba(37, 99, 235, .22);
    }

    .btn-primary:hover,
    .btn-primary:focus {
      color: #fff;
      background: linear-gradient(135deg, var(--rl-primary-dark), #1e40af);
      border-color: transparent;
      transform: translateY(-2px);
      box-shadow: 0 20px 42px rgba(37, 99, 235, .30);
    }

    .btn-outline-primary {
      color: var(--rl-primary-dark);
      background: rgba(255, 255, 255, .84);
      border-color: var(--rl-border-strong);
      box-shadow: 0 10px 24px rgba(37, 99, 235, .07);
    }

    .btn-outline-primary:hover,
    .btn-outline-primary:focus {
      color: var(--rl-primary-dark);
      background: var(--rl-primary-soft);
      border-color: rgba(37, 99, 235, .32);
      transform: translateY(-2px);
      box-shadow: 0 16px 34px rgba(37, 99, 235, .12);
    }

    .badge-soft {
      display: inline-flex;
      align-items: center;
      gap: 6px;
      border-radius: var(--rl-radius-pill);
      padding: 7px 11px;
      background: rgba(37, 99, 235, .08);
      color: var(--rl-primary-dark);
      border: 1px solid var(--rl-border);
      font-size: 13px;
      font-weight: 800;
      line-height: 1;
    }

    .badge-soft::before {
      content: "";
      width: 6px;
      height: 6px;
      border-radius: 50%;
      background: var(--rl-accent);
    }

    .article-hero {
      padding: 58px 0 34px;
      position: relative;
      overflow: hidden;
    }

    .article-hero::before {
      content: "";
      position: absolute;
      inset: 0;
      pointer-events: none;
      background:
        linear-gradient(90deg, rgba(37, 99, 235, .06) 1px, transparent 1px),
        linear-gradient(180deg, rgba(37, 99, 235, .05) 1px, transparent 1px);
      background-size: 42px 42px;
      mask-image: linear-gradient(180deg, rgba(0, 0, 0, .68), transparent 84%);
      opacity: .65;
    }

    .breadcrumb-wrap {
      position: relative;
      z-index: 1;
      margin-bottom: 20px;
    }

    .breadcrumb {
      margin: 0;
      font-size: 13px;
      color: var(--rl-muted);
      align-items: center;
    }

    .breadcrumb-item + .breadcrumb-item::before {
      content: "/";
      color: var(--rl-muted-2);
    }

    .breadcrumb a {
      color: var(--rl-muted);
      font-weight: 700;
    }

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

    .breadcrumb .active {
      color: var(--rl-text);
      font-weight: 800;
      max-width: 520px;
      white-space: nowrap;
      overflow: hidden;
      text-overflow: ellipsis;
    }

    .article-head-card {
      position: relative;
      z-index: 1;
      background:
        radial-gradient(circle at 88% 18%, rgba(56, 189, 248, .18), transparent 28%),
        linear-gradient(135deg, rgba(255, 255, 255, .96), rgba(241, 247, 255, .9));
      border: 1px solid var(--rl-border);
      border-radius: var(--rl-radius-lg);
      box-shadow: var(--rl-shadow);
      padding: 38px;
      overflow: hidden;
    }

    .article-head-card::after {
      content: "";
      position: absolute;
      right: -90px;
      top: -120px;
      width: 280px;
      height: 280px;
      border-radius: 50%;
      background: radial-gradient(circle, rgba(37, 99, 235, .13), transparent 68%);
      pointer-events: none;
    }

    .article-kicker {
      display: flex;
      flex-wrap: wrap;
      gap: 10px;
      margin-bottom: 16px;
    }

    .article-title {
      position: relative;
      z-index: 1;
      max-width: 920px;
      font-size: clamp(32px, 5vw, 52px);
      line-height: 1.15;
      letter-spacing: -.045em;
      font-weight: 850;
      margin: 0 0 18px;
      color: var(--rl-text);
    }

    .article-summary {
      position: relative;
      z-index: 1;
      max-width: 860px;
      color: var(--rl-muted);
      font-size: 17px;
      margin: 0;
    }

    .article-meta {
      position: relative;
      z-index: 1;
      display: flex;
      flex-wrap: wrap;
      gap: 12px;
      margin-top: 24px;
      color: #475569;
      font-size: 14px;
      font-weight: 700;
    }

    .meta-item {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      padding: 9px 12px;
      border-radius: var(--rl-radius-pill);
      background: rgba(255, 255, 255, .76);
      border: 1px solid rgba(37, 99, 235, .10);
    }

    .meta-dot {
      width: 7px;
      height: 7px;
      border-radius: 50%;
      background: var(--rl-accent);
      box-shadow: 0 0 0 5px rgba(56, 189, 248, .12);
    }

    .article-feature {
      margin-top: 28px;
      border-radius: var(--rl-radius-lg);
      min-height: 230px;
      background:
        radial-gradient(circle at 18% 28%, rgba(56, 189, 248, .28), transparent 26%),
        radial-gradient(circle at 82% 42%, rgba(37, 99, 235, .20), transparent 28%),
        linear-gradient(135deg, #f8fbff 0%, #eaf4ff 48%, #ffffff 100%);
      border: 1px solid var(--rl-border);
      box-shadow: var(--rl-shadow);
      overflow: hidden;
      position: relative;
    }

    .article-feature::before {
      content: "";
      position: absolute;
      inset: 24px;
      border-radius: 24px;
      border: 1px dashed rgba(37, 99, 235, .18);
    }

    .feature-lines {
      position: absolute;
      inset: 0;
      background:
        linear-gradient(90deg, transparent 0, transparent 18%, rgba(255, 255, 255, .72) 18.2%, transparent 18.5%),
        linear-gradient(120deg, transparent 0, transparent 42%, rgba(37, 99, 235, .16) 42.2%, transparent 42.7%);
      opacity: .82;
    }

    .feature-panel {
      position: absolute;
      left: 34px;
      bottom: 30px;
      display: grid;
      gap: 10px;
      width: min(420px, calc(100% - 68px));
      background: rgba(255, 255, 255, .86);
      border: 1px solid rgba(37, 99, 235, .12);
      border-radius: 22px;
      padding: 18px;
      box-shadow: 0 18px 40px rgba(37, 99, 235, .12);
    }

    .feature-panel strong {
      font-size: 16px;
      color: var(--rl-text);
    }

    .feature-panel span {
      color: var(--rl-muted);
      font-size: 14px;
    }

    .article-layout {
      padding: 34px 0 var(--rl-section);
    }

    .reading-card {
      background: rgba(255, 255, 255, .96);
      border: 1px solid rgba(37, 99, 235, .10);
      border-radius: var(--rl-radius-lg);
      box-shadow: var(--rl-shadow);
      padding: 42px;
    }

    .article-content {
      max-width: 820px;
      font-size: 17px;
      line-height: 1.9;
      color: #1e293b;
    }

    .article-content > *:first-child {
      margin-top: 0;
    }

    .article-content h2 {
      position: relative;
      font-size: clamp(24px, 3vw, 31px);
      line-height: 1.28;
      margin: 46px 0 18px;
      padding-left: 18px;
      font-weight: 850;
      letter-spacing: -.025em;
      color: var(--rl-text);
    }

    .article-content h2::before {
      content: "";
      position: absolute;
      left: 0;
      top: .22em;
      width: 5px;
      height: 1.05em;
      border-radius: var(--rl-radius-pill);
      background: linear-gradient(180deg, var(--rl-primary), var(--rl-accent));
    }

    .article-content h3 {
      font-size: clamp(20px, 2.6vw, 25px);
      margin: 34px 0 14px;
      font-weight: 820;
      color: var(--rl-text);
    }

    .article-content p {
      margin: 0 0 18px;
    }

    .article-content a {
      color: var(--rl-primary-dark);
      font-weight: 800;
      border-bottom: 1px solid rgba(37, 99, 235, .25);
    }

    .article-content a:hover {
      color: var(--rl-primary);
      border-color: rgba(37, 99, 235, .5);
      background: rgba(37, 99, 235, .05);
    }

    .article-content ul,
    .article-content ol {
      margin: 0 0 22px;
      padding-left: 1.35rem;
    }

    .article-content li {
      margin-bottom: 9px;
      padding-left: 3px;
    }

    .article-content blockquote {
      margin: 28px 0;
      padding: 22px 24px 22px 26px;
      background: linear-gradient(135deg, rgba(234, 244, 255, .9), rgba(236, 254, 255, .72));
      border-left: 5px solid var(--rl-primary);
      border-radius: 0 20px 20px 0;
      color: #1e3a8a;
      font-weight: 700;
      box-shadow: 0 12px 30px rgba(37, 99, 235, .08);
    }

    .article-content img,
    .article-content figure img {
      border-radius: 20px;
      box-shadow: 0 18px 46px rgba(37, 99, 235, .12);
      margin: 26px 0;
      border: 1px solid rgba(37, 99, 235, .10);
    }

    .article-content figure {
      margin: 32px 0;
    }

    .article-content figcaption {
      color: var(--rl-muted);
      text-align: center;
      font-size: 14px;
      margin-top: 10px;
    }

    .article-content table {
      width: 100%;
      border-collapse: separate;
      border-spacing: 0;
      margin: 28px 0;
      overflow: hidden;
      border: 1px solid var(--rl-border);
      border-radius: 18px;
      display: block;
      max-width: 100%;
      overflow-x: auto;
      background: #fff;
    }

    .article-content thead {
      background: var(--rl-primary-soft);
    }

    .article-content th,
    .article-content td {
      padding: 13px 16px;
      border-bottom: 1px solid rgba(226, 232, 240, .95);
      min-width: 120px;
      vertical-align: top;
    }

    .article-content th {
      color: var(--rl-primary-dark);
      font-weight: 850;
    }

    .article-content tr:last-child td {
      border-bottom: 0;
    }

    .article-content code {
      padding: 3px 7px;
      border-radius: 8px;
      background: rgba(37, 99, 235, .08);
      color: #1d4ed8;
      font-size: .92em;
    }

    .article-content pre {
      margin: 26px 0;
      padding: 20px;
      border-radius: 18px;
      background: #0f172a;
      color: #e2e8f0;
      overflow-x: auto;
      border: 1px solid rgba(37, 99, 235, .18);
    }

    .article-content pre code {
      padding: 0;
      color: inherit;
      background: transparent;
    }

    .not-found-box {
      max-width: 760px;
      padding: 42px;
      border-radius: var(--rl-radius-lg);
      background:
        radial-gradient(circle at 16% 16%, rgba(56, 189, 248, .18), transparent 28%),
        #fff;
      border: 1px solid var(--rl-border);
      box-shadow: var(--rl-shadow);
      text-align: center;
    }

    .not-found-icon {
      width: 68px;
      height: 68px;
      margin: 0 auto 18px;
      border-radius: 24px;
      background: linear-gradient(135deg, rgba(37, 99, 235, .12), rgba(56, 189, 248, .20));
      position: relative;
    }

    .not-found-icon::before,
    .not-found-icon::after {
      content: "";
      position: absolute;
      left: 19px;
      right: 19px;
      height: 5px;
      border-radius: var(--rl-radius-pill);
      background: var(--rl-primary);
      opacity: .82;
    }

    .not-found-icon::before {
      top: 24px;
    }

    .not-found-icon::after {
      top: 38px;
      width: 20px;
      right: auto;
      background: var(--rl-accent);
    }

    .not-found-box h2 {
      font-size: 28px;
      font-weight: 850;
      margin: 0 0 10px;
    }

    .not-found-box p {
      color: var(--rl-muted);
      margin: 0 0 24px;
    }

    .sidebar-stack {
      display: grid;
      gap: 18px;
      position: sticky;
      top: 104px;
    }

    .side-card {
      background: rgba(255, 255, 255, .92);
      border: 1px solid var(--rl-border);
      border-radius: var(--rl-radius);
      box-shadow: 0 14px 34px rgba(37, 99, 235, .08);
      padding: 24px;
      transition: transform .22s var(--rl-ease), box-shadow .22s var(--rl-ease), border-color .22s var(--rl-ease);
    }

    .side-card:hover {
      transform: translateY(-3px);
      border-color: rgba(37, 99, 235, .20);
      box-shadow: var(--rl-shadow);
    }

    .side-title {
      font-size: 17px;
      font-weight: 850;
      margin: 0 0 14px;
      display: flex;
      align-items: center;
      gap: 9px;
    }

    .side-title::before {
      content: "";
      width: 8px;
      height: 8px;
      border-radius: 50%;
      background: var(--rl-accent);
      box-shadow: 0 0 0 5px rgba(56, 189, 248, .12);
    }

    .side-text {
      color: var(--rl-muted);
      font-size: 14.5px;
      margin: 0 0 16px;
    }

    .toc-list {
      list-style: none;
      margin: 0;
      padding: 0;
      display: grid;
      gap: 8px;
    }

    .toc-list a {
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 10px;
      color: #475569;
      font-weight: 700;
      font-size: 14px;
      padding: 10px 12px;
      border-radius: 14px;
      background: rgba(248, 251, 255, .9);
      border: 1px solid rgba(37, 99, 235, .08);
    }

    .toc-list a:hover {
      color: var(--rl-primary);
      background: var(--rl-primary-soft);
      border-color: rgba(37, 99, 235, .18);
      transform: translateX(2px);
    }

    .mini-stat {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 10px;
      margin-top: 12px;
    }

    .mini-stat-item {
      border-radius: 16px;
      padding: 14px;
      background: linear-gradient(135deg, rgba(234, 244, 255, .86), rgba(255, 255, 255, .9));
      border: 1px solid rgba(37, 99, 235, .10);
    }

    .mini-stat-item strong {
      display: block;
      color: var(--rl-primary-dark);
      font-size: 20px;
      line-height: 1.2;
      margin-bottom: 4px;
    }

    .mini-stat-item span {
      color: var(--rl-muted);
      font-size: 12.5px;
      font-weight: 700;
    }

    .related-section {
      padding: 0 0 var(--rl-section);
    }

    .related-panel {
      border-radius: var(--rl-radius-lg);
      border: 1px solid var(--rl-border);
      background:
        radial-gradient(circle at 90% 10%, rgba(56, 189, 248, .16), transparent 26%),
        rgba(255, 255, 255, .94);
      box-shadow: var(--rl-shadow);
      padding: 34px;
    }

    .related-header {
      display: flex;
      align-items: flex-end;
      justify-content: space-between;
      gap: 24px;
      margin-bottom: 24px;
    }

    .related-header h2 {
      margin: 0;
      font-size: clamp(25px, 3vw, 34px);
      font-weight: 850;
      letter-spacing: -.03em;
    }

    .related-header p {
      margin: 6px 0 0;
      color: var(--rl-muted);
      max-width: 620px;
    }

    .related-card {
      height: 100%;
      border: 1px solid rgba(37, 99, 235, .10);
      border-radius: var(--rl-radius);
      background: rgba(255, 255, 255, .86);
      padding: 24px;
      box-shadow: 0 12px 32px rgba(37, 99, 235, .07);
      transition: transform .22s var(--rl-ease), box-shadow .22s var(--rl-ease), border-color .22s var(--rl-ease);
    }

    .related-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--rl-shadow);
      border-color: rgba(37, 99, 235, .20);
    }

    .related-card h3 {
      font-size: 18px;
      line-height: 1.42;
      font-weight: 850;
      margin: 14px 0 10px;
      display: -webkit-box;
      -webkit-line-clamp: 2;
      -webkit-box-orient: vertical;
      overflow: hidden;
    }

    .related-card p {
      color: var(--rl-muted);
      font-size: 14.5px;
      margin: 0 0 18px;
      display: -webkit-box;
      -webkit-line-clamp: 3;
      -webkit-box-orient: vertical;
      overflow: hidden;
    }

    .related-foot {
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 12px;
      color: var(--rl-muted);
      font-size: 13px;
      font-weight: 700;
      border-top: 1px solid rgba(226, 232, 240, .92);
      padding-top: 15px;
    }

    .text-link {
      color: var(--rl-primary-dark);
      font-weight: 850;
      display: inline-flex;
      align-items: center;
      gap: 6px;
    }

    .text-link:hover {
      color: var(--rl-primary);
      transform: translateX(2px);
    }

    .article-cta {
      padding: 0 0 var(--rl-section);
    }

    .cta-card {
      border-radius: var(--rl-radius-lg);
      border: 1px solid rgba(37, 99, 235, .16);
      background:
        radial-gradient(circle at 14% 20%, rgba(56, 189, 248, .20), transparent 28%),
        linear-gradient(135deg, #ffffff, #eef6ff);
      box-shadow: var(--rl-shadow-lg);
      padding: 42px;
      position: relative;
      overflow: hidden;
    }

    .cta-card::after {
      content: "";
      position: absolute;
      right: 38px;
      top: 38px;
      width: 110px;
      height: 110px;
      border-radius: 36px;
      border: 1px solid rgba(37, 99, 235, .16);
      background:
        linear-gradient(90deg, rgba(37, 99, 235, .10) 1px, transparent 1px),
        linear-gradient(180deg, rgba(37, 99, 235, .10) 1px, transparent 1px);
      background-size: 18px 18px;
      transform: rotate(8deg);
      opacity: .72;
    }

    .cta-card h2 {
      position: relative;
      z-index: 1;
      font-size: clamp(28px, 4vw, 40px);
      line-height: 1.18;
      font-weight: 850;
      letter-spacing: -.035em;
      margin: 0 0 12px;
    }

    .cta-card p {
      position: relative;
      z-index: 1;
      color: var(--rl-muted);
      max-width: 720px;
      margin: 0 0 24px;
      font-size: 16.5px;
    }

    .cta-actions {
      position: relative;
      z-index: 1;
      display: flex;
      flex-wrap: wrap;
      gap: 12px;
    }

    .site-footer {
      background:
        linear-gradient(180deg, rgba(241, 247, 255, .92), rgba(255, 255, 255, .96));
      border-top: 1px solid rgba(226, 232, 240, .9);
      padding: 70px 0 34px;
    }

    .footer-top {
      border-radius: var(--rl-radius-lg);
      background: rgba(255, 255, 255, .74);
      border: 1px solid rgba(37, 99, 235, .10);
      box-shadow: 0 14px 40px rgba(37, 99, 235, .07);
      padding: 34px;
    }

    .footer-grid {
      display: grid;
      grid-template-columns: 1.5fr .7fr .8fr;
      gap: 30px;
      align-items: start;
    }

    .footer-brand {
      display: inline-flex;
      align-items: center;
      gap: 12px;
      font-size: 18px;
      font-weight: 850;
      margin-bottom: 14px;
    }

    .footer-text {
      color: var(--rl-muted);
      max-width: 520px;
      margin: 0 0 18px;
      font-size: 14.5px;
    }

    .footer-title {
      font-size: 15px;
      font-weight: 850;
      margin: 0 0 14px;
    }

    .footer-links {
      list-style: none;
      padding: 0;
      margin: 0;
      display: grid;
      gap: 9px;
    }

    .footer-links a {
      color: var(--rl-muted);
      font-size: 14px;
      font-weight: 700;
    }

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

    .footer-bottom {
      margin-top: 26px;
      padding-top: 20px;
      border-top: 1px solid rgba(226, 232, 240, .92);
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 18px;
      color: var(--rl-muted);
      font-size: 13.5px;
      font-weight: 700;
    }

    .backtop {
      color: var(--rl-primary-dark);
      background: var(--rl-primary-soft);
      border: 1px solid var(--rl-border);
      border-radius: var(--rl-radius-pill);
      padding: 8px 12px;
    }

    .backtop:hover {
      background: #fff;
      border-color: rgba(37, 99, 235, .28);
      transform: translateY(-2px);
    }

    @media (max-width: 1200px) {
      :root {
        --rl-section: 92px;
      }

      .container {
        max-width: 1060px;
      }

      .reading-card {
        padding: 36px;
      }

      .article-head-card {
        padding: 34px;
      }
    }

    @media (max-width: 991.98px) {
      .navbar {
        min-height: 70px;
      }

      .navbar-collapse {
        margin-top: 12px;
        padding: 12px;
        border: 1px solid var(--rl-border);
        border-radius: 20px;
        background: rgba(255, 255, 255, .98);
        box-shadow: var(--rl-shadow);
      }

      .navbar-nav {
        align-items: stretch;
        gap: 6px;
      }

      .nav-link {
        padding: 12px 14px !important;
      }

      .nav-link.active::after {
        left: 14px;
        right: auto;
        width: 34px;
      }

      .article-hero {
        padding-top: 42px;
      }

      .sidebar-stack {
        position: static;
        margin-top: 24px;
      }

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

      .footer-grid > div:first-child {
        grid-column: 1 / -1;
      }
    }

    @media (max-width: 767.98px) {
      :root {
        --rl-section: 70px;
      }

      .container {
        padding-left: 18px;
        padding-right: 18px;
      }

      .article-head-card,
      .reading-card,
      .related-panel,
      .cta-card,
      .footer-top {
        padding: 26px;
        border-radius: 24px;
      }

      .article-title {
        letter-spacing: -.03em;
      }

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

      .article-feature {
        min-height: 200px;
      }

      .feature-panel {
        left: 20px;
        bottom: 20px;
        width: calc(100% - 40px);
      }

      .article-content {
        font-size: 16px;
        line-height: 1.86;
      }

      .related-header {
        display: block;
      }

      .related-header .btn {
        margin-top: 18px;
      }

      .cta-actions {
        flex-direction: column;
      }

      .cta-actions .btn {
        width: 100%;
      }

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

      .footer-bottom {
        flex-direction: column;
        align-items: flex-start;
      }
    }

    @media (max-width: 575.98px) {
      .navbar-brand {
        font-size: 16px;
        gap: 10px;
        max-width: 78%;
      }

      .brand-mark {
        width: 38px;
        height: 38px;
        border-radius: 14px;
      }

      .article-hero {
        padding: 34px 0 24px;
      }

      .article-head-card,
      .reading-card,
      .related-panel,
      .cta-card,
      .footer-top,
      .side-card {
        padding: 22px;
      }

      .article-meta {
        gap: 8px;
      }

      .meta-item {
        width: 100%;
        justify-content: flex-start;
      }

      .breadcrumb .active {
        max-width: 220px;
      }

      .mini-stat {
        grid-template-columns: 1fr;
      }

      .not-found-box {
        padding: 28px 20px;
      }

      .article-content h2 {
        margin-top: 34px;
      }

      .article-content table {
        font-size: 14px;
      }
    }

/* roulang: framework shim */
/* 覆盖 Bootstrap 等对 a/btn 的全局默认，避免导航出现下划线/蓝链 */
.site-header a,.site-header a:hover,.navbar a,.navbar a:hover,.nav-links a,.nav-links a:hover,header nav a,header nav a:hover{text-decoration:none}
.site-header .btn,.navbar .btn,.nav-cta{text-decoration:none}