/* roulang page: index */
:root {
      --color-primary: #4f8df7;
      --color-primary-strong: #2563eb;
      --color-primary-soft: #eaf2ff;
      --color-accent: #28c7b7;
      --color-accent-soft: #e6fbf8;
      --color-warning: #ffb84d;
      --color-warning-soft: #fff5df;
      --color-success: #20b486;
      --color-danger: #f06a6a;
      --color-bg: #f7faff;
      --color-surface: #ffffff;
      --color-surface-2: #f1f6ff;
      --color-panel: #eef5ff;
      --color-text: #152033;
      --color-muted: #627087;
      --color-faint: #8b97aa;
      --color-border: #dce7f7;
      --shadow-xs: 0 2px 8px rgba(22, 38, 68, .06);
      --shadow-sm: 0 10px 30px rgba(38, 82, 152, .09);
      --shadow-md: 0 18px 50px rgba(38, 82, 152, .14);
      --radius-sm: 10px;
      --radius-md: 16px;
      --radius-lg: 24px;
      --sidebar: 232px;
      --container: 1180px;
      --transition: 180ms ease;
      --font: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans CJK SC", Arial, sans-serif;
    }

    * {
      box-sizing: border-box;
    }

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

    body {
      margin: 0;
      font-family: var(--font);
      color: var(--color-text);
      background:
        radial-gradient(circle at 82% 8%, rgba(79, 141, 247, .16), transparent 34%),
        radial-gradient(circle at 22% 18%, rgba(40, 199, 183, .12), transparent 30%),
        linear-gradient(180deg, #fbfdff 0%, var(--color-bg) 48%, #ffffff 100%);
      line-height: 1.65;
      min-height: 100vh;
      overflow-x: hidden;
    }

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

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

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

    button {
      cursor: pointer;
    }

    :focus-visible {
      outline: 3px solid rgba(79, 141, 247, .34);
      outline-offset: 3px;
      border-radius: 10px;
    }

    ::selection {
      background: rgba(79, 141, 247, .22);
    }

    .site-shell {
      display: grid;
      grid-template-columns: var(--sidebar) minmax(0, 1fr);
      min-height: 100vh;
    }

    .sidebar {
      position: fixed;
      inset: 0 auto 0 0;
      width: var(--sidebar);
      padding: 22px 18px;
      background: rgba(255, 255, 255, .92);
      border-right: 1px solid var(--color-border);
      box-shadow: 14px 0 40px rgba(31, 72, 130, .06);
      backdrop-filter: blur(14px);
      z-index: 30;
      display: flex;
      flex-direction: column;
      gap: 22px;
    }

    .brand {
      display: flex;
      align-items: center;
      gap: 12px;
      padding: 10px 8px 16px;
      border-bottom: 1px solid var(--color-border);
    }

    .brand-mark {
      width: 42px;
      height: 42px;
      border-radius: 15px;
      display: grid;
      place-items: center;
      background: linear-gradient(135deg, var(--color-primary), #7bb7ff);
      color: #fff;
      box-shadow: 0 12px 26px rgba(79, 141, 247, .25);
      font-weight: 900;
      letter-spacing: -1px;
    }

    .brand-text {
      display: flex;
      flex-direction: column;
      min-width: 0;
    }

    .brand-text strong {
      font-size: 17px;
      line-height: 1.2;
      white-space: nowrap;
    }

    .brand-text span {
      color: var(--color-muted);
      font-size: 12px;
      margin-top: 2px;
    }

    .nav-menu {
      display: flex;
      flex-direction: column;
      gap: 8px;
    }

    .nav-link {
      display: flex;
      align-items: center;
      gap: 11px;
      padding: 12px 12px;
      border-radius: 14px;
      color: var(--color-muted);
      font-weight: 700;
      border: 1px solid transparent;
    }

    .nav-link .nav-icon {
      width: 26px;
      height: 26px;
      border-radius: 10px;
      display: grid;
      place-items: center;
      background: var(--color-surface-2);
      color: var(--color-primary-strong);
      font-size: 14px;
      flex: 0 0 auto;
    }

    .nav-link:hover {
      color: var(--color-primary-strong);
      background: var(--color-primary-soft);
      border-color: rgba(79, 141, 247, .18);
      transform: translateX(2px);
    }

    .nav-link.active {
      color: var(--color-primary-strong);
      background: linear-gradient(135deg, #edf5ff, #ffffff);
      border-color: rgba(79, 141, 247, .26);
      box-shadow: var(--shadow-xs);
    }

    .side-card {
      margin-top: auto;
      padding: 16px;
      border-radius: 18px;
      background: linear-gradient(180deg, #f2f7ff, #ffffff);
      border: 1px solid var(--color-border);
      box-shadow: var(--shadow-xs);
    }

    .side-card b {
      display: block;
      font-size: 14px;
      margin-bottom: 6px;
    }

    .side-card p {
      margin: 0 0 12px;
      font-size: 12px;
      color: var(--color-muted);
      line-height: 1.6;
    }

    .mobile-topbar {
      display: none;
      position: sticky;
      top: 0;
      z-index: 40;
      background: rgba(255, 255, 255, .94);
      backdrop-filter: blur(14px);
      border-bottom: 1px solid var(--color-border);
      padding: 10px 16px;
      align-items: center;
      justify-content: space-between;
    }

    .mobile-topbar .brand {
      padding: 0;
      border: 0;
    }

    .menu-toggle {
      width: 42px;
      height: 42px;
      border-radius: 14px;
      border: 1px solid var(--color-border);
      background: #fff;
      color: var(--color-primary-strong);
      box-shadow: var(--shadow-xs);
      display: grid;
      place-items: center;
    }

    .mobile-drawer {
      display: none;
      padding: 0 16px 14px;
      background: rgba(255, 255, 255, .96);
      border-bottom: 1px solid var(--color-border);
    }

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

    .main {
      grid-column: 2;
      min-width: 0;
    }

    .container {
      width: min(calc(100% - 48px), var(--container));
      margin: 0 auto;
    }

    .section {
      padding: 64px 0;
    }

    .section-tight {
      padding: 42px 0;
    }

    .section-head {
      display: grid;
      grid-template-columns: minmax(0, 1fr) auto;
      gap: 24px;
      align-items: end;
      margin-bottom: 24px;
    }

    .eyebrow {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      font-size: 13px;
      font-weight: 800;
      color: var(--color-primary-strong);
      background: var(--color-primary-soft);
      border: 1px solid rgba(79, 141, 247, .18);
      padding: 6px 10px;
      border-radius: 999px;
      width: fit-content;
    }

    .eyebrow-dot {
      width: 7px;
      height: 7px;
      border-radius: 99px;
      background: var(--color-accent);
      box-shadow: 0 0 0 5px rgba(40, 199, 183, .14);
    }

    h1,
    h2,
    h3,
    p {
      overflow-wrap: anywhere;
    }

    h1 {
      margin: 14px 0 14px;
      font-size: clamp(34px, 5vw, 62px);
      line-height: 1.08;
      letter-spacing: -.04em;
    }

    h2 {
      margin: 0 0 10px;
      font-size: clamp(26px, 3vw, 38px);
      line-height: 1.18;
      letter-spacing: -.03em;
    }

    h3 {
      margin: 0 0 8px;
      font-size: 19px;
      line-height: 1.35;
    }

    .lead {
      margin: 0;
      color: var(--color-muted);
      font-size: 17px;
      max-width: 760px;
    }

    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 8px;
      border: 1px solid transparent;
      min-height: 46px;
      padding: 12px 18px;
      border-radius: 14px;
      font-weight: 800;
      white-space: nowrap;
      box-shadow: none;
      user-select: none;
    }

    .btn-primary {
      color: #fff;
      background: linear-gradient(135deg, var(--color-primary-strong), var(--color-primary));
      box-shadow: 0 14px 30px rgba(37, 99, 235, .24);
    }

    .btn-primary:hover {
      transform: translateY(-2px);
      box-shadow: 0 18px 38px rgba(37, 99, 235, .30);
    }

    .btn-primary:active {
      transform: translateY(0);
      box-shadow: 0 10px 24px rgba(37, 99, 235, .18);
    }

    .btn-secondary {
      color: var(--color-primary-strong);
      background: #fff;
      border-color: var(--color-border);
      box-shadow: var(--shadow-xs);
    }

    .btn-secondary:hover {
      border-color: rgba(79, 141, 247, .42);
      background: var(--color-primary-soft);
      transform: translateY(-2px);
    }

    .btn-text {
      min-height: auto;
      padding: 0;
      color: var(--color-primary-strong);
      background: transparent;
      border: 0;
      border-radius: 8px;
      font-weight: 900;
    }

    .btn-text:hover {
      color: #1744b5;
      transform: translateX(3px);
    }

    .btn[aria-disabled="true"],
    .btn.disabled {
      color: var(--color-faint);
      background: #eef2f7;
      border-color: #e2e8f0;
      cursor: not-allowed;
      box-shadow: none;
      transform: none;
    }

    .badge {
      display: inline-flex;
      align-items: center;
      gap: 6px;
      padding: 6px 10px;
      border-radius: 999px;
      font-size: 12px;
      font-weight: 800;
      color: var(--color-muted);
      background: #fff;
      border: 1px solid var(--color-border);
    }

    .badge-live {
      color: #098f7e;
      background: var(--color-accent-soft);
      border-color: rgba(40, 199, 183, .22);
    }

    .badge-hot {
      color: #9b6100;
      background: var(--color-warning-soft);
      border-color: rgba(255, 184, 77, .28);
    }

    .card {
      background: var(--color-surface);
      border: 1px solid var(--color-border);
      border-radius: var(--radius-lg);
      box-shadow: var(--shadow-sm);
      transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
    }

    .card:hover {
      transform: translateY(-3px);
      box-shadow: var(--shadow-md);
      border-color: rgba(79, 141, 247, .30);
    }

    .hero {
      padding: 36px 0 56px;
    }

    .creator-cover {
      position: relative;
      overflow: hidden;
      min-height: 420px;
      border-radius: 30px;
      border: 1px solid rgba(79, 141, 247, .22);
      background:
        linear-gradient(135deg, rgba(255, 255, 255, .88), rgba(238, 246, 255, .86)),
        radial-gradient(circle at 18% 20%, rgba(79, 141, 247, .24), transparent 28%),
        radial-gradient(circle at 82% 48%, rgba(40, 199, 183, .18), transparent 34%);
      box-shadow: var(--shadow-md);
      padding: clamp(24px, 4vw, 46px);
      display: grid;
      grid-template-columns: minmax(0, 1.15fr) minmax(320px, .85fr);
      gap: 36px;
      align-items: end;
    }

    .creator-cover::before {
      content: "";
      position: absolute;
      inset: 0;
      background-image:
        linear-gradient(rgba(79, 141, 247, .08) 1px, transparent 1px),
        linear-gradient(90deg, rgba(79, 141, 247, .08) 1px, transparent 1px);
      background-size: 42px 42px;
      mask-image: linear-gradient(120deg, rgba(0, 0, 0, .75), transparent 68%);
      pointer-events: none;
    }

    .hero-copy,
    .profile-panel {
      position: relative;
      z-index: 1;
    }

    .hero-intro {
      margin: 0;
      max-width: 760px;
      font-size: 18px;
      color: var(--color-muted);
    }

    .hero-actions {
      display: flex;
      flex-wrap: wrap;
      gap: 12px;
      margin-top: 24px;
    }

    .hero-meta-row {
      display: flex;
      flex-wrap: wrap;
      gap: 10px;
      margin-top: 24px;
    }

    .profile-panel {
      background: rgba(255, 255, 255, .86);
      border: 1px solid rgba(220, 231, 247, .9);
      border-radius: 26px;
      padding: 20px;
      box-shadow: 0 18px 44px rgba(38, 82, 152, .12);
    }

    .profile-top {
      display: flex;
      align-items: center;
      gap: 14px;
      padding-bottom: 16px;
      border-bottom: 1px solid var(--color-border);
    }

    .avatar {
      width: 68px;
      height: 68px;
      border-radius: 22px;
      display: grid;
      place-items: center;
      color: #fff;
      font-size: 24px;
      font-weight: 900;
      background: linear-gradient(135deg, #2563eb, #28c7b7);
      box-shadow: 0 14px 30px rgba(37, 99, 235, .22);
      flex: 0 0 auto;
    }

    .profile-top strong {
      display: block;
      font-size: 20px;
      line-height: 1.3;
    }

    .profile-top span {
      color: var(--color-muted);
      font-size: 13px;
    }

    .data-badges {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 10px;
      margin: 16px 0;
    }

    .data-badge {
      padding: 12px 10px;
      border-radius: 16px;
      background: var(--color-surface-2);
      border: 1px solid rgba(79, 141, 247, .12);
      min-width: 0;
    }

    .data-badge b {
      display: block;
      font-size: 20px;
      letter-spacing: -.02em;
      color: var(--color-primary-strong);
      line-height: 1.1;
    }

    .data-badge span {
      display: block;
      margin-top: 4px;
      color: var(--color-muted);
      font-size: 12px;
      white-space: nowrap;
    }

    .cover-list {
      display: grid;
      gap: 10px;
      margin: 16px 0 0;
    }

    .cover-item {
      display: flex;
      align-items: center;
      gap: 10px;
      padding: 11px;
      border-radius: 16px;
      background: #fff;
      border: 1px solid var(--color-border);
    }

    .cover-thumb {
      width: 44px;
      height: 54px;
      border-radius: 12px;
      background:
        linear-gradient(135deg, rgba(79, 141, 247, .90), rgba(40, 199, 183, .78)),
        linear-gradient(45deg, #dbeafe, #ffffff);
      box-shadow: inset 0 -18px 28px rgba(255, 255, 255, .18);
      flex: 0 0 auto;
    }

    .cover-item b {
      display: block;
      font-size: 14px;
      line-height: 1.25;
    }

    .cover-item span {
      color: var(--color-muted);
      font-size: 12px;
    }

    .app-grid {
      display: grid;
      grid-template-columns: .95fr 1.05fr;
      gap: 22px;
      align-items: stretch;
    }

    .pain-board {
      padding: 22px;
      background: #fff;
    }

    .pain-list {
      display: grid;
      gap: 12px;
      margin-top: 18px;
    }

    .pain-item {
      display: grid;
      grid-template-columns: 34px minmax(0, 1fr);
      gap: 12px;
      padding: 14px;
      border-radius: 18px;
      background: linear-gradient(180deg, #f9fbff, #fff);
      border: 1px solid var(--color-border);
    }

    .pain-index {
      width: 34px;
      height: 34px;
      border-radius: 12px;
      display: grid;
      place-items: center;
      color: var(--color-primary-strong);
      font-weight: 900;
      background: var(--color-primary-soft);
    }

    .pain-item p {
      margin: 0;
      color: var(--color-muted);
      font-size: 14px;
    }

    .directory-card {
      padding: 22px;
      background: linear-gradient(180deg, #ffffff, #f4f8ff);
    }

    .directory-tree {
      margin-top: 18px;
      display: grid;
      gap: 12px;
    }

    .tree-row {
      display: grid;
      grid-template-columns: 92px minmax(0, 1fr) auto;
      gap: 12px;
      align-items: center;
      padding: 14px;
      border-radius: 18px;
      background: #fff;
      border: 1px solid var(--color-border);
    }

    .tree-row strong {
      font-size: 14px;
    }

    .tree-track {
      height: 8px;
      border-radius: 999px;
      background: #edf3fb;
      overflow: hidden;
    }

    .tree-fill {
      display: block;
      height: 100%;
      border-radius: 999px;
      background: linear-gradient(90deg, var(--color-primary), var(--color-accent));
    }

    .tree-row em {
      color: var(--color-muted);
      font-style: normal;
      font-size: 13px;
      font-weight: 800;
    }

    .service-layout {
      display: grid;
      grid-template-columns: 1.05fr .95fr;
      gap: 22px;
      align-items: start;
    }

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

    .solution-card {
      display: grid;
      grid-template-columns: 48px minmax(0, 1fr);
      gap: 14px;
      padding: 18px;
      border-radius: 22px;
      background: #fff;
      border: 1px solid var(--color-border);
      box-shadow: var(--shadow-xs);
      transition: transform var(--transition), box-shadow var(--transition);
    }

    .solution-card:hover {
      transform: translateY(-2px);
      box-shadow: var(--shadow-sm);
    }

    .solution-icon {
      width: 48px;
      height: 48px;
      border-radius: 16px;
      display: grid;
      place-items: center;
      background: var(--color-primary-soft);
      color: var(--color-primary-strong);
      font-size: 22px;
    }

    .solution-card p {
      margin: 0;
      color: var(--color-muted);
      font-size: 14px;
    }

    .poster-stage {
      min-height: 100%;
      padding: 20px;
      display: grid;
      gap: 14px;
      background:
        linear-gradient(145deg, #ffffff, #f2f7ff);
    }

    .poster-main {
      min-height: 282px;
      border-radius: 22px;
      overflow: hidden;
      position: relative;
      background:
        linear-gradient(160deg, rgba(37, 99, 235, .86), rgba(40, 199, 183, .76)),
        repeating-linear-gradient(45deg, rgba(255,255,255,.15) 0 8px, transparent 8px 16px);
      display: flex;
      align-items: flex-end;
      padding: 20px;
      color: #fff;
    }

    .poster-main::after {
      content: "";
      position: absolute;
      inset: 18px;
      border: 1px solid rgba(255, 255, 255, .34);
      border-radius: 18px;
      pointer-events: none;
    }

    .poster-main b {
      position: relative;
      z-index: 1;
      font-size: 24px;
      max-width: 260px;
      line-height: 1.2;
    }

    .poster-mini-row {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 10px;
    }

    .poster-mini {
      min-height: 86px;
      border-radius: 17px;
      background: #fff;
      border: 1px solid var(--color-border);
      padding: 12px;
    }

    .poster-mini b {
      color: var(--color-primary-strong);
      display: block;
      font-size: 18px;
    }

    .poster-mini span {
      color: var(--color-muted);
      font-size: 12px;
    }

    .about-metrics {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 18px;
    }

    .metric-card {
      padding: 22px;
      position: relative;
      overflow: hidden;
    }

    .metric-card::after {
      content: "";
      position: absolute;
      right: -28px;
      top: -28px;
      width: 110px;
      height: 110px;
      border-radius: 50%;
      background: rgba(79, 141, 247, .09);
    }

    .metric-card b {
      display: block;
      font-size: clamp(30px, 4vw, 48px);
      line-height: 1;
      color: var(--color-primary-strong);
      letter-spacing: -.04em;
    }

    .metric-card span {
      display: block;
      margin-top: 8px;
      color: var(--color-text);
      font-weight: 900;
    }

    .metric-card p {
      margin: 8px 0 0;
      color: var(--color-muted);
      font-size: 14px;
    }

    .progress-list {
      margin-top: 18px;
      padding: 20px;
      border-radius: 22px;
      background: #fff;
      border: 1px solid var(--color-border);
      box-shadow: var(--shadow-xs);
    }

    .progress-row {
      display: grid;
      grid-template-columns: 130px minmax(0, 1fr) 48px;
      gap: 12px;
      align-items: center;
      padding: 11px 0;
    }

    .progress-row + .progress-row {
      border-top: 1px solid var(--color-border);
    }

    .progress-row span {
      font-size: 14px;
      color: var(--color-muted);
      font-weight: 800;
    }

    .progress-bar {
      height: 9px;
      border-radius: 999px;
      background: #edf3fb;
      overflow: hidden;
    }

    .progress-bar i {
      display: block;
      height: 100%;
      border-radius: inherit;
      background: linear-gradient(90deg, var(--color-primary-strong), var(--color-accent));
    }

    .media-strip {
      display: flex;
      gap: 16px;
      overflow-x: auto;
      padding: 4px 4px 18px;
      scroll-snap-type: x mandatory;
    }

    .media-strip::-webkit-scrollbar {
      height: 10px;
    }

    .media-strip::-webkit-scrollbar-thumb {
      background: #cddbf0;
      border-radius: 999px;
    }

    .media-card {
      flex: 0 0 292px;
      scroll-snap-align: start;
      overflow: hidden;
      background: #fff;
      border: 1px solid var(--color-border);
      border-radius: 22px;
      box-shadow: var(--shadow-xs);
      transition: transform var(--transition), box-shadow var(--transition);
    }

    .media-card:hover {
      transform: translateY(-3px);
      box-shadow: var(--shadow-sm);
    }

    .media-visual {
      height: 132px;
      background:
        linear-gradient(135deg, rgba(79, 141, 247, .78), rgba(40, 199, 183, .68)),
        radial-gradient(circle at 28% 25%, rgba(255,255,255,.48), transparent 28%);
      position: relative;
    }

    .media-visual::after {
      content: attr(data-type);
      position: absolute;
      left: 14px;
      bottom: 14px;
      color: #fff;
      background: rgba(21, 32, 51, .24);
      border: 1px solid rgba(255,255,255,.34);
      border-radius: 999px;
      padding: 5px 9px;
      font-size: 12px;
      font-weight: 900;
    }

    .media-body {
      padding: 16px;
    }

    .media-body p {
      margin: 0;
      color: var(--color-muted);
      font-size: 14px;
    }

    .insight-layout {
      display: grid;
      grid-template-columns: .9fr 1.1fr;
      gap: 22px;
    }

    .quote-card {
      padding: 26px;
      background: linear-gradient(145deg, #ffffff, #eef6ff);
    }

    .quote-mark {
      width: 48px;
      height: 48px;
      border-radius: 16px;
      display: grid;
      place-items: center;
      color: #fff;
      background: var(--color-primary-strong);
      font-size: 28px;
      font-weight: 900;
      margin-bottom: 16px;
    }

    .quote-card blockquote {
      margin: 0;
      font-size: 22px;
      line-height: 1.55;
      font-weight: 900;
      letter-spacing: -.02em;
    }

    .quote-card cite {
      display: block;
      margin-top: 14px;
      color: var(--color-muted);
      font-style: normal;
    }

    .insight-list {
      display: grid;
      gap: 14px;
    }

    .insight-item {
      padding: 18px;
      border-radius: 22px;
      background: #fff;
      border: 1px solid var(--color-border);
      box-shadow: var(--shadow-xs);
    }

    .insight-item p {
      margin: 0;
      color: var(--color-muted);
      font-size: 14px;
    }

    .member-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 16px;
    }

    .member-card {
      padding: 20px;
      background: #fff;
      border: 1px solid var(--color-border);
      border-radius: 22px;
      box-shadow: var(--shadow-xs);
    }

    .member-card .member-icon {
      width: 42px;
      height: 42px;
      border-radius: 14px;
      display: grid;
      place-items: center;
      background: var(--color-accent-soft);
      color: #078b7d;
      font-size: 20px;
      margin-bottom: 12px;
    }

    .member-card p {
      margin: 0;
      color: var(--color-muted);
      font-size: 14px;
    }

    .testimonial-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 16px;
    }

    .testimonial-card {
      padding: 20px;
    }

    .user-row {
      display: flex;
      align-items: center;
      gap: 12px;
      margin-bottom: 14px;
    }

    .user-avatar {
      width: 46px;
      height: 46px;
      border-radius: 16px;
      display: grid;
      place-items: center;
      color: #fff;
      background: linear-gradient(135deg, #79a9ff, #28c7b7);
      font-weight: 900;
    }

    .user-row b {
      display: block;
    }

    .user-row span {
      color: var(--color-muted);
      font-size: 12px;
    }

    .testimonial-card p {
      margin: 0 0 14px;
      color: var(--color-muted);
      font-size: 15px;
    }

    .news-layout {
      display: grid;
      grid-template-columns: minmax(0, 1fr) 330px;
      gap: 22px;
      align-items: start;
    }

    .news-list {
      display: grid;
      gap: 14px;
    }

    .news-item {
      display: grid;
      grid-template-columns: minmax(0, 1fr) auto;
      gap: 18px;
      align-items: center;
      padding: 18px;
      border-radius: 22px;
      background: #fff;
      border: 1px solid var(--color-border);
      box-shadow: var(--shadow-xs);
      transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
    }

    .news-item:hover {
      transform: translateY(-2px);
      box-shadow: var(--shadow-sm);
      border-color: rgba(79, 141, 247, .32);
    }

    .news-meta {
      display: flex;
      flex-wrap: wrap;
      gap: 8px;
      margin-bottom: 8px;
    }

    .news-title {
      margin: 0 0 7px;
      font-size: 18px;
      line-height: 1.35;
    }

    .news-title a:hover {
      color: var(--color-primary-strong);
    }

    .news-summary {
      margin: 0;
      color: var(--color-muted);
      font-size: 14px;
      display: -webkit-box;
      -webkit-line-clamp: 2;
      -webkit-box-orient: vertical;
      overflow: hidden;
    }

    .news-arrow {
      width: 42px;
      height: 42px;
      border-radius: 14px;
      display: grid;
      place-items: center;
      color: var(--color-primary-strong);
      background: var(--color-primary-soft);
      font-weight: 900;
    }

    .empty-state {
      padding: 30px;
      border: 1px dashed #b9c9df;
      border-radius: 22px;
      color: var(--color-muted);
      background: #fff;
      text-align: center;
      box-shadow: var(--shadow-xs);
    }

    .recommend-panel {
      padding: 20px;
      position: sticky;
      top: 24px;
    }

    .recommend-panel p {
      color: var(--color-muted);
      margin: 0 0 16px;
      font-size: 14px;
    }

    .topic-list {
      display: grid;
      gap: 10px;
    }

    .topic-link {
      display: flex;
      justify-content: space-between;
      align-items: center;
      gap: 12px;
      padding: 12px;
      border-radius: 16px;
      background: var(--color-surface-2);
      border: 1px solid transparent;
      color: var(--color-muted);
      font-size: 14px;
      font-weight: 800;
    }

    .topic-link:hover {
      background: #fff;
      border-color: rgba(79, 141, 247, .26);
      color: var(--color-primary-strong);
      transform: translateX(2px);
    }

    .faq-wrap {
      display: grid;
      grid-template-columns: .9fr 1.1fr;
      gap: 22px;
      align-items: start;
    }

    .faq-list {
      display: grid;
      gap: 12px;
    }

    .faq-item {
      border: 1px solid var(--color-border);
      border-radius: 18px;
      background: #fff;
      box-shadow: var(--shadow-xs);
      overflow: hidden;
    }

    .faq-question {
      width: 100%;
      border: 0;
 transparent;
      border: 0;
      background: #fff;
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 16px;
      padding: 17px 18px;
      color: var(--color-text);
      font-weight: 900;
      text-align: left;
    }

    .faq-question:hover {
      color: var(--color-primary-strong);
      background: #f8fbff;
    }

    .faq-question .faq-plus {
      width: 28px;
      height: 28px;
      border-radius: 10px;
      background: var(--color-primary-soft);
      color: var(--color-primary-strong);
      display: grid;
      place-items: center;
      flex: 0 0 auto;
      transition: transform var(--transition), background var(--transition);
    }

    .faq-item.active .faq-plus {
      transform: rotate(45deg);
      background: var(--color-primary-strong);
      color: #fff;
    }

    .faq-answer {
      display: none;
      padding: 0 18px 18px;
      color: var(--color-muted);
      font-size: 15px;
    }

    .faq-item.active .faq-answer {
      display: block;
    }

    .faq-note {
      padding: 22px;
      background: linear-gradient(145deg, #ffffff, #eef7ff);
    }

    .faq-note p {
      margin: 0 0 14px;
      color: var(--color-muted);
    }

    .cta-panel {
      position: relative;
      overflow: hidden;
      border-radius: 30px;
      padding: clamp(26px, 5vw, 46px);
      background:
        radial-gradient(circle at 18% 24%, rgba(255, 255, 255, .40), transparent 28%),
        linear-gradient(135deg, #2563eb, #58a6ff 58%, #28c7b7);
      color: #fff;
      box-shadow: 0 24px 60px rgba(37, 99, 235, .24);
      display: grid;
      grid-template-columns: minmax(0, 1fr) auto;
      gap: 24px;
      align-items: center;
    }

    .cta-panel::after {
      content: "";
      position: absolute;
      inset: 18px;
      border: 1px solid rgba(255,255,255,.28);
      border-radius: 24px;
      pointer-events: none;
    }

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

    .cta-panel h2 {
      color: #fff;
      margin-bottom: 8px;
    }

    .cta-panel p {
      margin: 0;
      color: rgba(255, 255, 255, .88);
      max-width: 760px;
    }

    .cta-actions {
      display: flex;
      gap: 12px;
      flex-wrap: wrap;
      justify-content: flex-end;
    }

    .cta-actions .btn-secondary {
      background: rgba(255,255,255,.94);
      border-color: rgba(255,255,255,.4);
    }

    .footer {
      padding: 46px 0 30px;
      border-top: 1px solid var(--color-border);
      background: rgba(255,255,255,.72);
    }

    .footer-grid {
      display: grid;
      grid-template-columns: 1.15fr .85fr .85fr;
      gap: 24px;
      align-items: start;
    }

    .footer-brand {
      display: flex;
      align-items: center;
      gap: 12px;
      margin-bottom: 14px;
    }

    .footer p {
      margin: 0;
      color: var(--color-muted);
      font-size: 14px;
      max-width: 520px;
    }

    .footer h3 {
      font-size: 15px;
      margin-bottom: 12px;
    }

    .footer-links {
      display: grid;
      gap: 8px;
    }

    .footer-links a {
      color: var(--color-muted);
      font-size: 14px;
      width: fit-content;
    }

    .footer-links a:hover {
      color: var(--color-primary-strong);
      transform: translateX(2px);
    }

    .copyright {
      margin-top: 28px;
      padding-top: 18px;
      border-top: 1px solid var(--color-border);
      display: flex;
      justify-content: space-between;
      gap: 16px;
      color: var(--color-faint);
      font-size: 13px;
      flex-wrap: wrap;
    }

    .back-top {
      color: var(--color-primary-strong);
      font-weight: 900;
    }

    .back-top:hover {
      color: #1744b5;
    }

    @media (max-width: 1120px) {
      :root {
        --sidebar: 208px;
      }

      .container {
        width: min(calc(100% - 36px), var(--container));
      }

      .creator-cover,
      .app-grid,
      .service-layout,
      .insight-layout,
      .faq-wrap {
        grid-template-columns: 1fr;
      }

      .profile-panel {
        max-width: 680px;
      }

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

      .news-layout {
        grid-template-columns: 1fr;
      }

      .recommend-panel {
        position: static;
      }
    }

    @media (max-width: 860px) {
      .site-shell {
        display: block;
      }

      .sidebar {
        display: none;
      }

      .mobile-topbar {
        display: flex;
      }

      .main {
        grid-column: auto;
      }

      .hero {
        padding-top: 22px;
      }

      .creator-cover {
        min-height: auto;
        border-radius: 24px;
        padding: 24px;
      }

      .section {
        padding: 48px 0;
      }

      .section-head {
        grid-template-columns: 1fr;
        gap: 12px;
      }

      .about-metrics,
      .testimonial-grid,
      .footer-grid {
        grid-template-columns: 1fr;
      }

      .cta-panel {
        grid-template-columns: 1fr;
      }

      .cta-actions {
        justify-content: flex-start;
      }
    }

    @media (max-width: 620px) {
      .container {
        width: min(calc(100% - 28px), var(--container));
      }

      h1 {
        font-size: 34px;
      }

      .hero-intro,
      .lead {
        font-size: 15px;
      }

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

      .btn {
        width: 100%;
      }

      .brand-text strong {
        font-size: 15px;
      }

      .brand-text span {
        display: none;
      }

      .creator-cover {
        padding: 20px;
      }

      .profile-top {
        align-items: flex-start;
      }

      .data-badges,
      .poster-mini-row {
        grid-template-columns: 1fr;
      }

      .tree-row,
      .progress-row,
      .news-item {
        grid-template-columns: 1fr;
      }

      .news-arrow {
        justify-self: start;
      }

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

      .media-card {
        flex-basis: 82vw;
      }

      .copyright {
        display: grid;
      }
    }

/* roulang page: article */
:root {
      --color-primary: #4f8df7;
      --color-primary-strong: #2563eb;
      --color-primary-soft: #eaf2ff;
      --color-accent: #28c7b7;
      --color-accent-soft: #e6fbf8;
      --color-warning: #ffb84d;
      --color-warning-soft: #fff5df;
      --color-success: #20b486;
      --color-danger: #f06a6a;
      --color-bg: #f7faff;
      --color-surface: #ffffff;
      --color-surface-2: #f1f6ff;
      --color-panel: #eef5ff;
      --color-text: #152033;
      --color-muted: #627087;
      --color-faint: #8b97aa;
      --color-border: #dce7f7;
      --shadow-xs: 0 2px 8px rgba(22, 38, 68, .06);
      --shadow-sm: 0 10px 30px rgba(38, 82, 152, .09);
      --shadow-md: 0 18px 50px rgba(38, 82, 152, .14);
      --radius-sm: 10px;
      --radius-md: 16px;
      --radius-lg: 24px;
      --sidebar: 208px;
      --container: 1180px;
      --transition: 180ms ease;
      --font: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans CJK SC", Arial, sans-serif;
    }

    * {
      box-sizing: border-box;
    }

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

    body {
      margin: 0;
      font-family: var(--font);
      color: var(--color-text);
      background:
        radial-gradient(circle at 82% 8%, rgba(79, 141, 247, .16), transparent 34%),
        radial-gradient(circle at 22% 18%, rgba(40, 199, 183, .12), transparent 30%),
        linear-gradient(180deg, #fbfdff 0%, var(--color-bg) 48%, #ffffff 100%);
      line-height: 1.65;
      min-height: 100vh;
      overflow-x: hidden;
    }

    body.drawer-lock {
      overflow: hidden;
    }

    ::selection {
      background: rgba(79, 141, 247, .2);
      color: var(--color-primary-strong);
    }

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

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

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

    button {
      cursor: pointer;
    }

    button:disabled,
    .is-disabled {
      cursor: not-allowed;
      opacity: .58;
      box-shadow: none !important;
      transform: none !important;
    }

    :focus-visible {
      outline: 3px solid rgba(79, 141, 247, .32);
      outline-offset: 3px;
    }

    .app-shell {
      display: grid;
      grid-template-columns: var(--sidebar) minmax(0, 1fr);
      min-height: 100vh;
    }

    .sidebar {
      position: fixed;
      inset: 0 auto 0 0;
      width: var(--sidebar);
      z-index: 30;
      display: flex;
      flex-direction: column;
      gap: 22px;
      padding: 22px 16px;
      background: rgba(255, 255, 255, .92);
      backdrop-filter: blur(18px);
      border-right: 1px solid var(--color-border);
      box-shadow: 12px 0 34px rgba(38, 82, 152, .06);
    }

    .brand {
      display: flex;
      align-items: center;
      gap: 12px;
      padding: 10px 8px 16px;
      border-bottom: 1px solid var(--color-border);
    }

    .brand-mark {
      width: 42px;
      height: 42px;
      border-radius: 15px;
      display: grid;
      place-items: center;
      background: linear-gradient(135deg, var(--color-primary), #7bb7ff);
      color: #fff;
      box-shadow: 0 12px 26px rgba(79, 141, 247, .25);
      font-weight: 900;
      letter-spacing: -1px;
      flex: 0 0 auto;
    }

    .brand-text {
      display: flex;
      flex-direction: column;
      min-width: 0;
    }

    .brand-text strong {
      font-size: 17px;
      line-height: 1.2;
      white-space: nowrap;
    }

    .brand-text span {
      color: var(--color-muted);
      font-size: 12px;
      margin-top: 2px;
    }

    .nav-menu {
      display: flex;
      flex-direction: column;
      gap: 8px;
    }

    .nav-link {
      display: flex;
      align-items: center;
      gap: 11px;
      padding: 12px 12px;
      border-radius: 14px;
      color: var(--color-muted);
      font-weight: 700;
      border: 1px solid transparent;
    }

    .nav-link .nav-icon {
      width: 26px;
      height: 26px;
      border-radius: 10px;
      display: grid;
      place-items: center;
      background: var(--color-surface-2);
      color: var(--color-primary-strong);
      font-size: 14px;
      flex: 0 0 auto;
    }

    .nav-link:hover {
      color: var(--color-primary-strong);
      background: var(--color-primary-soft);
      border-color: rgba(79, 141, 247, .18);
      transform: translateX(2px);
    }

    .nav-link.active {
      color: var(--color-primary-strong);
      background: linear-gradient(135deg, #edf5ff, #ffffff);
      border-color: rgba(79, 141, 247, .26);
      box-shadow: var(--shadow-xs);
    }

    .side-card {
      margin-top: auto;
      padding: 16px;
      border-radius: 18px;
      background: linear-gradient(180deg, #f2f7ff, #ffffff);
      border: 1px solid var(--color-border);
      box-shadow: var(--shadow-xs);
    }

    .side-card b {
      display: block;
      font-size: 14px;
      margin-bottom: 6px;
    }

    .side-card p {
      margin: 0 0 12px;
      font-size: 12px;
      color: var(--color-muted);
      line-height: 1.6;
    }

    .mobile-topbar {
      display: none;
      position: sticky;
      top: 0;
      z-index: 40;
      background: rgba(255, 255, 255, .94);
      backdrop-filter: blur(14px);
      border-bottom: 1px solid var(--color-border);
      padding: 10px 16px;
      align-items: center;
      justify-content: space-between;
    }

    .mobile-topbar .brand {
      padding: 0;
      border: 0;
    }

    .menu-toggle {
      width: 42px;
      height: 42px;
      border-radius: 14px;
      border: 1px solid var(--color-border);
      background: #fff;
      color: var(--color-primary-strong);
      box-shadow: var(--shadow-xs);
      display: grid;
      place-items: center;
      transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition), background var(--transition);
    }

    .menu-toggle:hover {
      transform: translateY(-1px);
      border-color: rgba(79, 141, 247, .35);
      box-shadow: var(--shadow-sm);
      background: var(--color-primary-soft);
    }

    .mobile-drawer {
      display: none;
      position: sticky;
      top: 63px;
      z-index: 39;
      padding: 0 16px 14px;
      background: rgba(255, 255, 255, .96);
      border-bottom: 1px solid var(--color-border);
      box-shadow: 0 18px 36px rgba(38, 82, 152, .09);
    }

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

    .main {
      grid-column: 2;
      min-width: 0;
    }

    .container {
      width: min(calc(100% - 48px), var(--container));
      margin: 0 auto;
    }

    .section {
      padding: 64px 0;
    }

    .section-tight {
      padding: 42px 0;
    }

    .section-head {
      display: grid;
      grid-template-columns: minmax(0, 1fr) auto;
      gap: 24px;
      align-items: end;
      margin-bottom: 24px;
    }

    .eyebrow {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      font-size: 13px;
      font-weight: 800;
      color: var(--color-primary-strong);
      background: var(--color-primary-soft);
      border: 1px solid rgba(79, 141, 247, .18);
      padding: 6px 10px;
      border-radius: 999px;
      width: fit-content;
    }

    .eyebrow-dot {
      width: 7px;
      height: 7px;
      border-radius: 99px;
      background: var(--color-accent);
      box-shadow: 0 0 0 5px rgba(40, 199, 183, .12);
    }

    .badge-row {
      display: flex;
      flex-wrap: wrap;
      align-items: center;
      gap: 10px;
    }

    .badge {
      display: inline-flex;
      align-items: center;
      gap: 7px;
      padding: 6px 10px;
      border-radius: 999px;
      background: #fff;
      border: 1px solid var(--color-border);
      color: var(--color-muted);
      font-size: 13px;
      font-weight: 700;
      line-height: 1.2;
      max-width: 100%;
    }

    .badge.info {
      background: var(--color-primary-soft);
      border-color: rgba(79, 141, 247, .22);
      color: var(--color-primary-strong);
    }

    .badge.success {
      background: var(--color-accent-soft);
      border-color: rgba(40, 199, 183, .22);
      color: #138477;
    }

    .badge.warning {
      background: var(--color-warning-soft);
      border-color: rgba(255, 184, 77, .32);
      color: #9a650e;
    }

    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 9px;
      min-height: 44px;
      padding: 11px 18px;
      border-radius: 14px;
      border: 1px solid transparent;
      font-weight: 800;
      line-height: 1.2;
      white-space: nowrap;
      transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition), background var(--transition), color var(--transition);
    }

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

    .btn-primary:hover {
      transform: translateY(-2px);
      box-shadow: 0 20px 40px rgba(37, 99, 235, .28);
    }

    .btn-primary:active {
      transform: translateY(0);
      box-shadow: 0 10px 22px rgba(37, 99, 235, .2);
    }

    .btn-secondary {
      color: var(--color-primary-strong);
      background: #fff;
      border-color: var(--color-border);
      box-shadow: var(--shadow-xs);
    }

    .btn-secondary:hover {
      background: var(--color-primary-soft);
      border-color: rgba(79, 141, 247, .32);
      transform: translateY(-1px);
      box-shadow: var(--shadow-sm);
    }

    .btn-text {
      color: var(--color-primary-strong);
      padding: 0;
      min-height: auto;
      border-radius: 8px;
      font-weight: 800;
    }

    .btn-text:hover {
      color: #174dbd;
      transform: translateX(2px);
    }

    .article-hero {
      padding: 54px 0 28px;
    }

    .article-hero-panel {
      position: relative;
      overflow: hidden;
      border-radius: var(--radius-lg);
      padding: 34px;
      background:
        linear-gradient(135deg, rgba(255, 255, 255, .98), rgba(239, 246, 255, .95)),
        radial-gradient(circle at 90% 0%, rgba(40, 199, 183, .15), transparent 32%);
      border: 1px solid rgba(220, 231, 247, .88);
      box-shadow: var(--shadow-sm);
    }

    .article-hero-panel::after {
      content: "";
      position: absolute;
      right: -70px;
      top: -84px;
      width: 260px;
      height: 260px;
      border-radius: 50%;
      background: radial-gradient(circle, rgba(79, 141, 247, .18), transparent 68%);
      pointer-events: none;
    }

    .breadcrumb {
      display: flex;
      align-items: center;
      flex-wrap: wrap;
      gap: 8px;
      color: var(--color-muted);
      font-size: 13px;
      font-weight: 700;
      margin-bottom: 18px;
    }

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

    .breadcrumb a:hover {
      color: #174dbd;
    }

    .breadcrumb .sep {
      color: var(--color-faint);
    }

    .article-title-wrap {
      display: grid;
      grid-template-columns: minmax(0, 1fr) 260px;
      gap: 32px;
      align-items: end;
      position: relative;
      z-index: 1;
    }

    .article-title-wrap h1 {
      margin: 14px 0 14px;
      font-size: clamp(30px, 4vw, 52px);
      line-height: 1.12;
      letter-spacing: -.04em;
      max-width: 880px;
    }

    .article-summary {
      margin: 0;
      max-width: 840px;
      color: var(--color-muted);
      font-size: 17px;
      line-height: 1.9;
    }

    .download-card {
      padding: 18px;
      border-radius: 20px;
      background: #fff;
      border: 1px solid var(--color-border);
      box-shadow: var(--shadow-xs);
    }

    .download-cover {
      min-height: 154px;
      border-radius: 16px;
      padding: 16px;
      color: #fff;
      background:
        linear-gradient(135deg, rgba(37, 99, 235, .95), rgba(40, 199, 183, .88)),
        radial-gradient(circle at 85% 10%, rgba(255, 255, 255, .45), transparent 32%);
      display: flex;
      flex-direction: column;
      justify-content: space-between;
      overflow: hidden;
      position: relative;
    }

    .download-cover::after {
      content: "";
      position: absolute;
      right: -36px;
      bottom: -44px;
      width: 118px;
      height: 118px;
      border-radius: 34px;
      border: 18px solid rgba(255, 255, 255, .2);
      transform: rotate(12deg);
    }

    .download-cover small {
      position: relative;
      z-index: 1;
      font-weight: 800;
      opacity: .9;
    }

    .download-cover strong {
      position: relative;
      z-index: 1;
      font-size: 22px;
      line-height: 1.22;
      max-width: 160px;
    }

    .download-list {
      list-style: none;
      margin: 14px 0 0;
      padding: 0;
      display: grid;
      gap: 8px;
      color: var(--color-muted);
      font-size: 13px;
    }

    .download-list li {
      display: flex;
      gap: 8px;
      align-items: flex-start;
    }

    .download-list li::before {
      content: "•";
      color: var(--color-accent);
      font-weight: 900;
    }

    .cover-section {
      padding: 18px 0 34px;
    }

    .cover-frame {
      overflow: hidden;
      border-radius: var(--radius-lg);
      border: 1px solid var(--color-border);
      background: #fff;
      box-shadow: var(--shadow-sm);
    }

    .article-cover {
      min-height: 326px;
      padding: 28px;
      display: grid;
      grid-template-columns: minmax(0, 1.35fr) minmax(260px, .65fr);
      gap: 24px;
      align-items: stretch;
      background:
        linear-gradient(120deg, rgba(21, 32, 51, .05), transparent 42%),
        linear-gradient(135deg, #ffffff 0%, #edf5ff 64%, #e8fbf8 100%);
    }

    .cover-visual {
      position: relative;
      min-height: 268px;
      border-radius: 22px;
      overflow: hidden;
      background:
        radial-gradient(circle at 18% 18%, rgba(255, 255, 255, .72), transparent 20%),
        linear-gradient(135deg, #6aa4ff, #2563eb 52%, #28c7b7);
      box-shadow: inset 0 0 0 1px rgba(255, 255, 255, .32);
    }

    .cover-visual::before {
      content: "";
      position: absolute;
      inset: 22px;
      border-radius: 18px;
      border: 1px solid rgba(255, 255, 255, .36);
      background:
        linear-gradient(90deg, rgba(255,255,255,.23) 1px, transparent 1px),
        linear-gradient(0deg, rgba(255,255,255,.16) 1px, transparent 1px);
      background-size: 34px 34px;
    }

    .cover-ribbon {
      position: absolute;
      left: 22px;
      top: 22px;
      display: inline-flex;
      align-items: center;
      gap: 8px;
      padding: 8px 11px;
      border-radius: 999px;
      color: #fff;
      background: rgba(21, 32, 51, .22);
      backdrop-filter: blur(8px);
      font-size: 13px;
      font-weight: 800;
    }

    .cover-ribbon::before {
      content: "";
      width: 8px;
      height: 8px;
      border-radius: 99px;
      background: #7cffd8;
      box-shadow: 0 0 0 5px rgba(124, 255, 216, .18);
    }

    .cover-title {
      position: absolute;
      left: 26px;
      right: 26px;
      bottom: 24px;
      color: #fff;
    }

    .cover-title span {
      display: inline-flex;
      margin-bottom: 10px;
      padding: 5px 9px;
      border-radius: 999px;
      background: rgba(255, 255, 255, .2);
      font-size: 12px;
      font-weight: 800;
    }

    .cover-title b {
      display: block;
      font-size: clamp(24px, 3vw, 38px);
      line-height: 1.14;
      letter-spacing: -.03em;
      text-shadow: 0 8px 22px rgba(11, 28, 66, .22);
    }

    .pull-quote {
      margin: 0;
      padding: 24px;
      border-radius: 22px;
      background: rgba(255, 255, 255, .82);
      border: 1px solid rgba(220, 231, 247, .88);
      display: flex;
      flex-direction: column;
      justify-content: space-between;
      min-height: 268px;
    }

    .pull-quote p {
      margin: 0;
      color: var(--color-text);
      font-size: 20px;
      line-height: 1.7;
      font-weight: 800;
      letter-spacing: -.02em;
    }

    .pull-quote cite {
      margin-top: 18px;
      color: var(--color-muted);
      font-style: normal;
      font-size: 13px;
      font-weight: 700;
    }

    .article-layout {
      display: grid;
      grid-template-columns: minmax(0, 1fr) 308px;
      gap: 28px;
      align-items: start;
    }

    .article-card,
    .aside-card,
    .related-card,
    .faq-card,
    .cta-panel {
      background: rgba(255, 255, 255, .96);
      border: 1px solid var(--color-border);
      border-radius: var(--radius-lg);
      box-shadow: var(--shadow-sm);
    }

    .article-card {
      overflow: hidden;
    }

    .article-meta-bar {
      display: flex;
      flex-wrap: wrap;
      gap: 10px;
      align-items: center;
      justify-content: space-between;
      padding: 18px 24px;
      border-bottom: 1px solid var(--color-border);
      background: linear-gradient(180deg, #ffffff, #f7fbff);
    }

    .meta-left {
      display: flex;
      flex-wrap: wrap;
      gap: 10px;
      align-items: center;
    }

    .article-body {
      padding: 34px;
      color: #243047;
      font-size: 17px;
      word-break: break-word;
      overflow-wrap: anywhere;
    }

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

    .article-body > :last-child {
      margin-bottom: 0;
    }

    .article-body h2,
    .article-body h3,
    .article-body h4 {
      color: var(--color-text);
      line-height: 1.35;
      letter-spacing: -.02em;
    }

    .article-body h2 {
      margin: 42px 0 16px;
      padding-left: 14px;
      border-left: 4px solid var(--color-primary);
      font-size: 28px;
    }

    .article-body h3 {
      margin: 32px 0 12px;
      font-size: 22px;
    }

    .article-body h4 {
      margin: 24px 0 10px;
      font-size: 18px;
    }

    .article-body p {
      margin: 0 0 20px;
      line-height: 2;
    }

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

    .article-body a:hover {
      color: #174dbd;
      border-bottom-color: rgba(37, 99, 235, .58);
    }

    .article-body ul,
    .article-body ol {
      margin: 0 0 22px 0;
      padding-left: 1.4em;
    }

    .article-body li {
      margin: 8px 0;
      padding-left: 4px;
    }

    .article-body blockquote {
      margin: 30px 0;
      padding: 22px 24px;
      border-left: 4px solid var(--color-accent);
      border-radius: 0 var(--radius-md) var(--radius-md) 0;
      background: var(--color-accent-soft);
      color: #1f6059;
      font-weight: 800;
    }

    .article-body blockquote p {
      margin: 0;
    }

    .article-body hr {
      border: 0;
      height: 1px;
      background: linear-gradient(90deg, transparent, var(--color-border), transparent);
      margin: 36px 0;
    }

    .article-body img {
      width: 100%;
      height: auto;
      border-radius: 18px;
      border: 1px solid var(--color-border);
      box-shadow: var(--shadow-xs);
      margin: 24px 0;
    }

    .article-body table {
      width: 100%;
      border-collapse: collapse;
      margin: 24px 0;
      overflow: hidden;
      border-radius: var(--radius-md);
      font-size: 15px;
    }

    .article-body th,
    .article-body td {
      border: 1px solid var(--color-border);
      padding: 12px 14px;
      text-align: left;
    }

    .article-body th {
      background: var(--color-primary-soft);
      color: var(--color-primary-strong);
      font-weight: 900;
    }

    .article-body pre {
      white-space: pre-wrap;
      overflow-x: auto;
      border-radius: var(--radius-md);
      padding: 18px;
      background: #142033;
      color: #eaf2ff;
      line-height: 1.7;
    }

    .article-body code {
      padding: 2px 6px;
      border-radius: 7px;
      background: var(--color-surface-2);
      color: var(--color-primary-strong);
    }

    .empty-state {
      padding: 52px 24px;
      text-align: center;
      border-radius: var(--radius-lg);
      background:
        radial-gradient(circle at 50% 0%, rgba(79, 141, 247, .14), transparent 36%),
        linear-gradient(180deg, #ffffff, #f5f9ff);
      border: 1px dashed rgba(79, 141, 247, .35);
    }

    .empty-state h2 {
      margin: 0 0 12px;
      padding: 0;
      border: 0;
      font-size: 28px;
    }

    .empty-state p {
      margin: 0 0 22px;
      color: var(--color-muted);
    }

    .article-aside {
      position: sticky;
      top: 24px;
      display: grid;
      gap: 18px;
    }

    .aside-card {
      padding: 20px;
    }

    .aside-card h2,
    .aside-card h3 {
      margin: 0 0 14px;
      font-size: 18px;
      line-height: 1.35;
    }

    .aside-card p {
      margin: 0;
      color: var(--color-muted);
      font-size: 14px;
    }

    .toc-list,
    .note-list,
    .related-list {
      list-style: none;
      padding: 0;
      margin: 0;
      display: grid;
      gap: 10px;
    }

    .toc-list a,
    .related-list a {
      display: flex;
      justify-content: space-between;
      gap: 12px;
      align-items: center;
      padding: 11px 12px;
      border-radius: 14px;
      background: var(--color-surface-2);
      color: var(--color-muted);
      font-weight: 800;
      font-size: 14px;
      border: 1px solid transparent;
    }

    .toc-list a:hover,
    .related-list a:hover {
      color: var(--color-primary-strong);
      background: var(--color-primary-soft);
      border-color: rgba(79, 141, 247, .22);
      transform: translateX(2px);
    }

    .note-list li {
      display: grid;
      grid-template-columns: 28px minmax(0, 1fr);
      gap: 10px;
      align-items: start;
      color: var(--color-muted);
      font-size: 14px;
    }

    .note-icon {
      width: 28px;
      height: 28px;
      border-radius: 10px;
      display: grid;
      place-items: center;
      background: var(--color-accent-soft);
      color: #168b7d;
      font-weight: 900;
      line-height: 1;
    }

    .tag-cloud {
      display: flex;
      flex-wrap: wrap;
      gap: 9px;
    }

    .tag {
      display: inline-flex;
      align-items: center;
      min-height: 30px;
      padding: 5px 10px;
      border-radius: 999px;
      background: #fff;
      border: 1px solid var(--color-border);
      color: var(--color-muted);
      font-size: 13px;
      font-weight: 800;
    }

    .tag:hover {
      color: var(--color-primary-strong);
      border-color: rgba(79, 141, 247, .35);
      background: var(--color-primary-soft);
    }

    .subscribe-box {
      display: grid;
      gap: 10px;
      margin-top: 14px;
    }

    .input {
      width: 100%;
      min-height: 44px;
      border: 1px solid var(--color-border);
      border-radius: 14px;
      padding: 10px 13px;
      color: var(--color-text);
      background: #fff;
      transition: border-color var(--transition), box-shadow var(--transition), background var(--transition);
    }

    .input::placeholder {
      color: var(--color-faint);
    }

    .input:hover {
      border-color: rgba(79, 141, 247, .34);
    }

    .input:focus {
      outline: none;
      border-color: var(--color-primary);
      box-shadow: 0 0 0 4px rgba(79, 141, 247, .14);
    }

    .related-grid {
      display: grid;
      grid-template-columns: repeat(3, minmax(0, 1fr));
      gap: 18px;
    }

    .related-card {
      padding: 22px;
      transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
    }

    .related-card:hover {
      transform: translateY(-3px);
      box-shadow: var(--shadow-md);
      border-color: rgba(79, 141, 247, .28);
    }

    .related-card h3 {
      margin: 12px 0 8px;
      font-size: 20px;
      line-height: 1.35;
    }

    .related-card p {
      margin: 0 0 16px;
      color: var(--color-muted);
      font-size: 14px;
    }

    .faq-grid {
      display: grid;
      gap: 14px;
    }

    .faq-card {
      overflow: hidden;
      transition: box-shadow var(--transition), border-color var(--transition);
    }

    .faq-card:hover {
      border-color: rgba(79, 141, 247, .28);
      box-shadow: var(--shadow-md);
    }

    .faq-card details {
      padding: 0;
    }

    .faq-card summary {
      list-style: none;
      cursor: pointer;
      padding: 18px 20px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 16px;
      font-weight: 900;
      color: var(--color-text);
    }

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

    .faq-card summary::after {
      content: "+";
      width: 28px;
      height: 28px;
      border-radius: 10px;
      display: grid;
      place-items: center;
      flex: 0 0 auto;
      background: var(--color-primary-soft);
      color: var(--color-primary-strong);
      font-size: 18px;
      line-height: 1;
    }

    .faq-card details[open] summary::after {
      content: "−";
      background: var(--color-accent-soft);
      color: #168b7d;
    }

    .faq-card .faq-content {
      padding: 0 20px 20px;
      color: var(--color-muted);
    }

    .faq-card .faq-content p {
      margin: 0;
    }

    .cta-panel {
      position: relative;
      overflow: hidden;
      padding: 34px;
      display: grid;
      grid-template-columns: minmax(0, 1fr) auto;
      gap: 24px;
      align-items: center;
      background:
        radial-gradient(circle at 94% 16%, rgba(40, 199, 183, .18), transparent 30%),
        linear-gradient(135deg, #ffffff, #eef6ff);
    }

    .cta-panel::before {
      content: "";
      position: absolute;
      left: -54px;
      bottom: -64px;
      width: 180px;
      height: 180px;
      border-radius: 50%;
      background: rgba(79, 141, 247, .12);
    }

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

    .cta-panel h2 {
      margin: 0 0 10px;
      font-size: clamp(25px, 3vw, 36px);
      line-height: 1.22;
      letter-spacing: -.03em;
    }

    .cta-panel p {
      margin: 0;
      color: var(--color-muted);
      max-width: 740px;
    }

    .cta-actions {
      display: flex;
      flex-wrap: wrap;
      gap: 12px;
      justify-content: flex-end;
    }

    .footer {
      margin-top: 40px;
      padding: 44px 0 22px;
      background: #ffffff;
      border-top: 1px solid var(--color-border);
    }

    .footer-grid {
      display: grid;
      grid-template-columns: minmax(0, 1.35fr) minmax(170px, .45fr) minmax(170px, .45fr);
      gap: 32px;
      align-items: start;
    }

    .footer-brand {
      display: flex;
      align-items: center;
      gap: 12px;
      margin-bottom: 12px;
    }

    .footer-brand strong {
      font-size: 18px;
    }

    .footer p {
      margin: 0;
      max-width: 560px;
      color: var(--color-muted);
      font-size: 14px;
    }

    .footer h3 {
      margin: 0 0 12px;
      font-size: 15px;
    }

    .footer-links {
      display: grid;
      gap: 8px;
    }

    .footer-links a {
      color: var(--color-muted);
      font-size: 14px;
      width: fit-content;
    }

    .footer-links a:hover {
      color: var(--color-primary-strong);
      transform: translateX(2px);
    }

    .copyright {
      margin-top: 28px;
      padding-top: 18px;
      border-top: 1px solid var(--color-border);
      display: flex;
      justify-content: space-between;
      gap: 18px;
      align-items: center;
      color: var(--color-faint);
      font-size: 13px;
    }

    .back-top {
      color: var(--color-primary-strong);
      font-weight: 800;
    }

    .back-top:hover {
      color: #174dbd;
    }

    @media (max-width: 1160px) {
      :root {
        --sidebar: 196px;
      }

      .article-title-wrap {
        grid-template-columns: 1fr;
      }

      .download-card {
        max-width: 420px;
      }

      .article-layout {
        grid-template-columns: minmax(0, 1fr) 280px;
      }

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

    @media (max-width: 1024px) {
      .app-shell {
        display: block;
      }

      .sidebar {
        display: none;
      }

      .mobile-topbar {
        display: flex;
      }

      .main {
        grid-column: auto;
      }

      .article-hero {
        padding-top: 30px;
      }

      .article-layout {
        grid-template-columns: 1fr;
      }

      .article-aside {
        position: static;
        grid-template-columns: repeat(2, minmax(0, 1fr));
      }

      .article-cover {
        grid-template-columns: 1fr;
      }

      .pull-quote {
        min-height: auto;
      }
    }

    @media (max-width: 768px) {
      .container {
        width: min(calc(100% - 32px), var(--container));
      }

      .section {
        padding: 46px 0;
      }

      .section-tight {
        padding: 32px 0;
      }

      .section-head {
        grid-template-columns: 1fr;
        gap: 12px;
      }

      .article-hero-panel {
        padding: 24px;
      }

      .article-title-wrap h1 {
        font-size: clamp(28px, 9vw, 40px);
      }

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

      .article-cover {
        padding: 20px;
      }

      .cover-visual {
        min-height: 236px;
      }

      .article-body {
        padding: 24px;
        font-size: 16px;
      }

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

      .article-meta-bar {
        align-items: flex-start;
        flex-direction: column;
      }

      .article-aside {
        grid-template-columns: 1fr;
      }

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

      .cta-panel {
        grid-template-columns: 1fr;
        padding: 26px;
      }

      .cta-actions {
        justify-content: flex-start;
      }

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

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

    @media (max-width: 520px) {
      .brand-text strong {
        font-size: 15px;
      }

      .brand-text span {
        display: none;
      }

      .mobile-topbar {
        padding: 9px 12px;
      }

      .container {
        width: min(calc(100% - 24px), var(--container));
      }

      .article-hero-panel,
      .article-card,
      .aside-card,
      .related-card,
      .faq-card,
      .cta-panel,
      .cover-frame {
        border-radius: 18px;
      }

      .article-hero-panel {
        padding: 20px;
      }

      .badge-row {
        gap: 8px;
      }

      .badge {
        font-size: 12px;
      }

      .btn {
        width: 100%;
      }

      .download-card {
        padding: 14px;
      }

      .article-cover {
        padding: 14px;
      }

      .cover-visual {
        min-height: 210px;
        border-radius: 16px;
      }

      .cover-title {
        left: 18px;
        right: 18px;
        bottom: 18px;
      }

      .pull-quote {
        padding: 18px;
        border-radius: 16px;
      }

      .pull-quote p {
        font-size: 18px;
      }

      .article-body {
        padding: 20px;
      }

      .article-body p {
        line-height: 1.9;
      }

      .article-body table {
        display: block;
        overflow-x: auto;
        white-space: nowrap;
      }

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