/* roulang page: index */
:root {
      --color-primary: #2B1B3F;
      --color-primary-soft: #47305f;
      --color-accent: #A64DFF;
      --color-accent-soft: rgba(166, 77, 255, .12);
      --color-warm: #FFB15C;
      --color-warm-soft: rgba(255, 177, 92, .16);
      --color-bg: #F7F5FA;
      --color-bg-alt: #EEE8F6;
      --color-card: #ffffff;
      --color-text: #231F2E;
      --color-muted: #6D6578;
      --color-faint: #9A92A5;
      --color-border: #E3DCEB;
      --radius-sm: 12px;
      --radius-md: 18px;
      --radius-lg: 24px;
      --radius-xl: 32px;
      --shadow-sm: 0 10px 28px rgba(43, 27, 63, .08);
      --shadow-md: 0 18px 48px rgba(43, 27, 63, .12);
      --shadow-glow: 0 16px 44px rgba(166, 77, 255, .22);
      --container: 1220px;
      --ease: .22s ease;
    }

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

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

    body {
      min-height: 100vh;
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", Arial, sans-serif;
      color: var(--color-text);
      background:
        radial-gradient(circle at 10% 4%, rgba(166, 77, 255, .13), transparent 32%),
        radial-gradient(circle at 92% 12%, rgba(255, 177, 92, .14), transparent 30%),
        var(--color-bg);
      line-height: 1.75;
      overflow-x: hidden;
    }

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

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

    button,
    input,
    textarea {
      font: inherit;
    }

    button {
      border: 0;
      cursor: pointer;
      background: transparent;
    }

    :focus-visible {
      outline: 3px solid rgba(166, 77, 255, .42);
      outline-offset: 3px;
      border-radius: 12px;
    }

    .container {
      width: min(100% - 64px, var(--container));
      margin-inline: auto;
    }

    .section {
      padding: 86px 0;
      position: relative;
    }

    .section.alt {
      background: linear-gradient(180deg, rgba(238, 232, 246, .72), rgba(247, 245, 250, .88));
    }

    .eyebrow {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      padding: 7px 12px;
      border: 1px solid rgba(166, 77, 255, .22);
      border-radius: 999px;
      color: var(--color-primary);
      background: rgba(255, 255, 255, .76);
      font-size: 13px;
      font-weight: 700;
      box-shadow: 0 8px 20px rgba(43, 27, 63, .05);
    }

    .eyebrow::before {
      content: "";
      width: 8px;
      height: 8px;
      border-radius: 999px;
      background: var(--color-warm);
      box-shadow: 0 0 0 5px rgba(255, 177, 92, .16);
    }

    .section-head {
      display: grid;
      grid-template-columns: minmax(0, 1fr) minmax(280px, 430px);
      gap: 28px;
      align-items: end;
      margin-bottom: 34px;
    }

    .section-title {
      margin-top: 14px;
      font-size: clamp(26px, 3vw, 36px);
      line-height: 1.25;
      letter-spacing: -.02em;
      color: var(--color-primary);
    }

    .section-desc {
      color: var(--color-muted);
      font-size: 16px;
      line-height: 1.85;
    }

    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 9px;
      min-height: 48px;
      padding: 12px 20px;
      border-radius: 18px;
      font-weight: 800;
      border: 1px solid transparent;
      line-height: 1;
      white-space: nowrap;
      user-select: none;
    }

    .btn-primary {
      background: var(--color-primary);
      color: #fff;
      box-shadow: 0 14px 30px rgba(43, 27, 63, .22);
    }

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

    .btn-secondary {
      background: rgba(255, 255, 255, .86);
      color: var(--color-primary);
      border-color: var(--color-border);
    }

    .btn-secondary:hover {
      background: var(--color-bg-alt);
      border-color: rgba(166, 77, 255, .34);
      transform: translateY(-2px);
    }

    .btn:active {
      transform: translateY(0) scale(.99);
    }

    .badge {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      padding: 5px 10px;
      border-radius: 999px;
      font-size: 12px;
      font-weight: 800;
      color: var(--color-primary);
      background: var(--color-accent-soft);
      border: 1px solid rgba(166, 77, 255, .18);
    }

    .badge.warm {
      background: var(--color-warm-soft);
      border-color: rgba(255, 177, 92, .3);
    }

    .site-header {
      position: sticky;
      top: 0;
      z-index: 50;
      background: rgba(255, 255, 255, .86);
      backdrop-filter: blur(16px);
      border-bottom: 1px solid rgba(227, 220, 235, .82);
    }

    .nav-wrap {
      height: 74px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 22px;
    }

    .brand {
      display: inline-flex;
      align-items: center;
      gap: 11px;
      min-width: 0;
      font-weight: 900;
      color: var(--color-primary);
      letter-spacing: -.02em;
    }

    .brand-mark {
      width: 42px;
      height: 42px;
      flex: 0 0 auto;
      border-radius: 15px;
      display: grid;
      place-items: center;
      background:
        linear-gradient(135deg, var(--color-primary), var(--color-accent));
      box-shadow: 0 14px 28px rgba(43, 27, 63, .22);
      color: #fff;
    }

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

    .brand-text {
      max-width: 330px;
      font-size: 17px;
      line-height: 1.25;
      overflow: hidden;
      text-overflow: ellipsis;
      white-space: nowrap;
    }

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

    .nav-links a {
      display: inline-flex;
      align-items: center;
      min-height: 42px;
      padding: 9px 13px;
      border-radius: 14px;
      color: var(--color-muted);
      font-size: 15px;
      font-weight: 700;
    }

    .nav-links a:hover,
    .nav-links a.active {
      color: var(--color-primary);
      background: var(--color-accent-soft);
    }

    .nav-action {
      display: flex;
      align-items: center;
      gap: 10px;
    }

    .menu-toggle {
      display: none;
      width: 46px;
      height: 46px;
      border-radius: 15px;
      border: 1px solid var(--color-border);
      background: #fff;
      color: var(--color-primary);
    }

    .menu-toggle span {
      display: block;
      width: 19px;
      height: 2px;
      background: currentColor;
      margin: 5px auto;
      border-radius: 99px;
      transition: transform var(--ease), opacity var(--ease);
    }

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

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

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

    .mobile-panel {
      display: none;
      border-top: 1px solid var(--color-border);
      background: rgba(255, 255, 255, .96);
    }

    .mobile-panel a {
      display: flex;
      align-items: center;
      min-height: 48px;
      padding: 12px 0;
      color: var(--color-primary);
      font-weight: 800;
      border-bottom: 1px solid rgba(227, 220, 235, .7);
    }

    .hero {
      position: relative;
      isolation: isolate;
      padding: 92px 0 42px;
      background:
        linear-gradient(90deg, rgba(247,245,250,.97) 0%, rgba(247,245,250,.88) 46%, rgba(238,232,246,.82) 100%),
        url("/assets/images/backpic/back-1.webp") center/cover no-repeat;
      overflow: hidden;
    }

    .hero::after {
      content: "";
      position: absolute;
      width: 420px;
      height: 420px;
      border-radius: 999px;
      right: -150px;
      top: 80px;
      background: rgba(166, 77, 255, .18);
      filter: blur(6px);
      z-index: -1;
    }

    .hero-shell {
      display: grid;
      grid-template-columns: minmax(0, .94fr) minmax(340px, .76fr);
      gap: 42px;
      align-items: center;
    }

    .hero-kicker {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      color: var(--color-primary);
      background: rgba(255, 255, 255, .82);
      border: 1px solid rgba(227, 220, 235, .9);
      padding: 8px 13px;
      border-radius: 999px;
      font-weight: 800;
      font-size: 13px;
      box-shadow: var(--shadow-sm);
    }

    .hero-kicker b {
      color: var(--color-accent);
    }

    .hero h1 {
      margin-top: 18px;
      max-width: 760px;
      font-size: clamp(32px, 5vw, 54px);
      line-height: 1.16;
      color: var(--color-primary);
      letter-spacing: -.04em;
    }

    .hero-subtitle {
      margin-top: 20px;
      max-width: 680px;
      color: var(--color-muted);
      font-size: 18px;
      line-height: 1.9;
    }

    .hero-actions {
      margin-top: 30px;
      display: flex;
      flex-wrap: wrap;
      gap: 14px;
    }

    .hero-note {
      margin-top: 18px;
      display: flex;
      flex-wrap: wrap;
      gap: 10px 18px;
      color: var(--color-muted);
      font-size: 14px;
    }

    .hero-note span {
      display: inline-flex;
      align-items: center;
      gap: 7px;
    }

    .hero-note span::before {
      content: "";
      width: 7px;
      height: 7px;
      border-radius: 999px;
      background: var(--color-warm);
    }

    .video-board {
      position: relative;
      padding: 18px;
      border: 1px solid rgba(255, 255, 255, .82);
      border-radius: 30px;
      background: rgba(255, 255, 255, .72);
      box-shadow: var(--shadow-md);
      backdrop-filter: blur(12px);
    }

    .screen {
      min-height: 286px;
      border-radius: 24px;
      overflow: hidden;
      background:
        linear-gradient(180deg, rgba(43, 27, 63, .1), rgba(43, 27, 63, .66)),
        url("/assets/images/coverpic/cover-1.webp") center/cover no-repeat;
      position: relative;
      display: flex;
      align-items: flex-end;
      padding: 20px;
      color: #fff;
    }

    .play-circle {
      position: absolute;
      top: 50%;
      left: 50%;
      width: 70px;
      height: 70px;
      transform: translate(-50%, -50%);
      border-radius: 999px;
      background: rgba(255, 255, 255, .88);
      display: grid;
      place-items: center;
      color: var(--color-primary);
      box-shadow: 0 18px 38px rgba(0, 0, 0, .18);
    }

    .play-circle svg {
      width: 26px;
      height: 26px;
      margin-left: 3px;
    }

    .screen-info {
      position: relative;
      z-index: 2;
    }

    .screen-info strong {
      display: block;
      font-size: 21px;
      line-height: 1.35;
      margin-top: 8px;
    }

    .screen-info p {
      color: rgba(255, 255, 255, .82);
      font-size: 14px;
      margin-top: 4px;
    }

    .board-list {
      display: grid;
      gap: 12px;
      margin-top: 14px;
    }

    .board-item {
      display: grid;
      grid-template-columns: 42px 1fr auto;
      gap: 12px;
      align-items: center;
      padding: 13px;
      border-radius: 18px;
      background: #fff;
      border: 1px solid rgba(227, 220, 235, .78);
    }

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

    .board-item strong {
      display: block;
      font-size: 15px;
      color: var(--color-primary);
      line-height: 1.35;
    }

    .board-item small {
      color: var(--color-faint);
      font-weight: 700;
    }

    .info-strip {
      margin-top: 36px;
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 14px;
    }

    .strip-item {
      background: rgba(255, 255, 255, .78);
      border: 1px solid rgba(227, 220, 235, .9);
      border-radius: 20px;
      padding: 17px 18px;
      box-shadow: var(--shadow-sm);
    }

    .strip-item b {
      display: block;
      color: var(--color-primary);
      font-size: 16px;
      margin-bottom: 3px;
    }

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

    .steps-layout {
      display: grid;
      grid-template-columns: minmax(0, 1fr) 360px;
      gap: 24px;
      align-items: stretch;
    }

    .steps-track {
      position: relative;
      display: grid;
      gap: 16px;
    }

    .step-card {
      display: grid;
      grid-template-columns: 72px minmax(0, 1fr) 54px;
      gap: 18px;
      align-items: center;
      padding: 22px;
      border-radius: 24px;
      background: var(--color-card);
      border: 1px solid var(--color-border);
      box-shadow: var(--shadow-sm);
      transition: transform var(--ease), box-shadow var(--ease), border-color var(--ease);
    }

    .step-card:hover {
      transform: translateY(-4px);
      border-color: rgba(166, 77, 255, .35);
      box-shadow: var(--shadow-md);
    }

    .step-no {
      width: 58px;
      height: 58px;
      border-radius: 20px;
      display: grid;
      place-items: center;
      color: #fff;
      background: linear-gradient(135deg, var(--color-primary), var(--color-accent));
      font-weight: 900;
      font-size: 18px;
    }

    .step-card h3 {
      color: var(--color-primary);
      font-size: 21px;
      line-height: 1.35;
      margin-bottom: 4px;
    }

    .step-card p {
      color: var(--color-muted);
      font-size: 15px;
      line-height: 1.75;
    }

    .step-icon {
      width: 48px;
      height: 48px;
      border-radius: 16px;
      display: grid;
      place-items: center;
      color: var(--color-primary);
      background: var(--color-warm-soft);
      font-weight: 900;
    }

    .focus-card {
      min-height: 100%;
      border-radius: 28px;
      padding: 28px;
      background:
        linear-gradient(180deg, rgba(43, 27, 63, .88), rgba(43, 27, 63, .72)),
        url("/assets/images/backpic/back-2.jpg") center/cover no-repeat;
      color: #fff;
      box-shadow: var(--shadow-md);
      display: flex;
      flex-direction: column;
      justify-content: space-between;
      overflow: hidden;
      position: relative;
    }

    .focus-card::after {
      content: "";
      position: absolute;
      width: 150px;
      height: 150px;
      border-radius: 999px;
      right: -40px;
      bottom: -40px;
      background: rgba(255, 177, 92, .28);
    }

    .focus-card h3 {
      font-size: 25px;
      line-height: 1.32;
      margin-bottom: 12px;
    }

    .focus-card p {
      color: rgba(255, 255, 255, .78);
      font-size: 15px;
    }

    .focus-points {
      margin-top: 28px;
      display: grid;
      gap: 10px;
      position: relative;
      z-index: 1;
    }

    .focus-points span {
      display: inline-flex;
      align-items: center;
      gap: 9px;
      padding: 10px 12px;
      border-radius: 16px;
      background: rgba(255, 255, 255, .12);
      border: 1px solid rgba(255, 255, 255, .18);
      color: rgba(255, 255, 255, .9);
      font-size: 14px;
      font-weight: 700;
    }

    .showcase-grid {
      display: grid;
      grid-template-columns: 1.18fr .82fr;
      gap: 24px;
      align-items: stretch;
    }

    .large-feature,
    .mini-feature {
      border: 1px solid var(--color-border);
      background: var(--color-card);
      border-radius: 28px;
      overflow: hidden;
      box-shadow: var(--shadow-sm);
      transition: transform var(--ease), box-shadow var(--ease), border-color var(--ease);
    }

    .large-feature:hover,
    .mini-feature:hover {
      transform: translateY(-4px);
      border-color: rgba(166, 77, 255, .36);
      box-shadow: var(--shadow-md);
    }

    .large-image {
      height: 310px;
      position: relative;
      overflow: hidden;
    }

    .large-image img,
    .mini-feature img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      transition: transform .5s ease;
    }

    .large-feature:hover img,
    .mini-feature:hover img {
      transform: scale(1.04);
    }

    .large-image::after {
      content: "";
      position: absolute;
      inset: 0;
      background: linear-gradient(180deg, transparent 35%, rgba(43, 27, 63, .72));
    }

    .large-overlay {
      position: absolute;
      left: 24px;
      right: 24px;
      bottom: 22px;
      z-index: 1;
      color: #fff;
    }

    .large-overlay h3 {
      font-size: 26px;
      line-height: 1.28;
      margin: 10px 0 6px;
    }

    .large-overlay p {
      color: rgba(255, 255, 255, .82);
      font-size: 15px;
    }

    .feature-body {
      padding: 24px;
    }

    .tag-row {
      display: flex;
      flex-wrap: wrap;
      gap: 8px;
      margin-top: 18px;
    }

    .mini-stack {
      display: grid;
      gap: 24px;
    }

    .mini-feature {
      display: grid;
      grid-template-columns: 150px 1fr;
      min-height: 170px;
    }

    .mini-feature img {
      min-height: 170px;
    }

    .mini-body {
      padding: 20px;
      display: flex;
      flex-direction: column;
      justify-content: center;
    }

    .mini-body h3 {
      color: var(--color-primary);
      font-size: 20px;
      line-height: 1.35;
      margin-bottom: 8px;
    }

    .mini-body p {
      color: var(--color-muted);
      font-size: 14px;
      line-height: 1.7;
    }

    .trust-layout {
      display: grid;
      grid-template-columns: .84fr 1.16fr;
      gap: 34px;
      align-items: start;
    }

    .trust-copy {
      position: sticky;
      top: 104px;
      padding: 30px;
      border-radius: 28px;
      background: #fff;
      border: 1px solid var(--color-border);
      box-shadow: var(--shadow-sm);
    }

    .trust-copy h2 {
      color: var(--color-primary);
      font-size: clamp(26px, 3vw, 34px);
      line-height: 1.28;
      margin: 14px 0 12px;
    }

    .trust-copy p {
      color: var(--color-muted);
      margin-bottom: 18px;
    }

    .neutral-data {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 12px;
      margin-top: 22px;
    }

    .data-box {
      padding: 16px;
      border-radius: 18px;
      background: var(--color-bg);
      border: 1px solid var(--color-border);
    }

    .data-box b {
      display: block;
      color: var(--color-primary);
      font-size: 22px;
      line-height: 1.2;
    }

    .data-box span {
      color: var(--color-faint);
      font-size: 13px;
      font-weight: 700;
    }

    .timeline {
      display: grid;
      gap: 16px;
      position: relative;
    }

    .timeline-item {
      display: grid;
      grid-template-columns: 46px 1fr;
      gap: 16px;
      padding: 22px;
      border-radius: 24px;
      background: #fff;
      border: 1px solid var(--color-border);
      box-shadow: var(--shadow-sm);
      transition: transform var(--ease), border-color var(--ease), box-shadow var(--ease);
    }

    .timeline-item:hover {
      transform: translateY(-3px);
      border-color: rgba(166, 77, 255, .34);
      box-shadow: var(--shadow-md);
    }

    .timeline-dot {
      width: 42px;
      height: 42px;
      border-radius: 15px;
      display: grid;
      place-items: center;
      background: var(--color-accent-soft);
      color: var(--color-accent);
      font-weight: 900;
    }

    .timeline-item h3 {
      font-size: 20px;
      color: var(--color-primary);
      margin-bottom: 4px;
    }

    .timeline-item p {
      color: var(--color-muted);
      font-size: 15px;
      line-height: 1.75;
    }

    .latest-layout {
      display: grid;
      grid-template-columns: minmax(0, 1fr) 340px;
      gap: 24px;
      align-items: start;
    }

    .post-list {
      display: grid;
      gap: 16px;
    }

    .post-card {
      display: grid;
      gap: 10px;
      padding: 22px;
      border-radius: 22px;
      background: #fff;
      border: 1px solid var(--color-border);
      box-shadow: var(--shadow-sm);
      transition: transform var(--ease), box-shadow var(--ease), border-color var(--ease);
    }

    .post-card:hover {
      transform: translateY(-4px);
      border-color: rgba(166, 77, 255, .34);
      box-shadow: var(--shadow-md);
    }

    .post-top {
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 14px;
      color: var(--color-faint);
      font-size: 13px;
      font-weight: 700;
    }

    .post-card h3 {
      color: var(--color-primary);
      font-size: 21px;
      line-height: 1.38;
      display: -webkit-box;
      -webkit-line-clamp: 2;
      -webkit-box-orient: vertical;
      overflow: hidden;
    }

    .post-card p {
      color: var(--color-muted);
      font-size: 15px;
      line-height: 1.75;
      display: -webkit-box;
      -webkit-line-clamp: 3;
      -webkit-box-orient: vertical;
      overflow: hidden;
    }

    .post-bottom {
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 14px;
      margin-top: 4px;
    }

    .read-link {
      color: var(--color-primary);
      font-weight: 900;
      display: inline-flex;
      align-items: center;
      gap: 6px;
    }

    .read-link:hover {
      color: var(--color-accent);
      text-decoration: underline;
      text-underline-offset: 4px;
    }

    .side-panel {
      padding: 24px;
      border-radius: 26px;
      background:
        linear-gradient(180deg, rgba(255,255,255,.94), rgba(238,232,246,.86));
      border: 1px solid rgba(227, 220, 235, .92);
      box-shadow: var(--shadow-sm);
      position: sticky;
      top: 104px;
    }

    .side-panel h3 {
      color: var(--color-primary);
      font-size: 22px;
      line-height: 1.35;
      margin-bottom: 10px;
    }

    .side-panel p {
      color: var(--color-muted);
      font-size: 15px;
      margin-bottom: 16px;
    }

    .tip-list {
      display: grid;
      gap: 10px;
      margin-top: 16px;
    }

    .tip-list li {
      list-style: none;
      padding: 12px 13px;
      border-radius: 16px;
      background: rgba(255, 255, 255, .72);
      color: var(--color-muted);
      border: 1px solid rgba(227, 220, 235, .8);
      font-size: 14px;
    }

    .empty-card {
      padding: 34px 24px;
      border-radius: 24px;
      background: #fff;
      border: 1px dashed rgba(166, 77, 255, .42);
      box-shadow: var(--shadow-sm);
      text-align: center;
    }

    .empty-icon {
      width: 58px;
      height: 58px;
      margin: 0 auto 14px;
      border-radius: 20px;
      display: grid;
      place-items: center;
      background: var(--color-accent-soft);
      color: var(--color-accent);
      font-size: 24px;
      font-weight: 900;
    }

    .empty-card strong {
      display: block;
      color: var(--color-primary);
      font-size: 18px;
      margin-bottom: 6px;
    }

    .empty-card p {
      color: var(--color-muted);
      margin-bottom: 18px;
    }

    .faq-grid {
      display: grid;
      grid-template-columns: .9fr 1.1fr;
      gap: 28px;
      align-items: start;
    }

    .faq-intro {
      padding: 28px;
      border-radius: 28px;
      background: var(--color-primary);
      color: #fff;
      box-shadow: var(--shadow-md);
    }

    .faq-intro h2 {
      font-size: 32px;
      line-height: 1.25;
      margin: 14px 0 12px;
    }

    .faq-intro p {
      color: rgba(255, 255, 255, .76);
    }

    .faq-list {
      display: grid;
      gap: 13px;
    }

    .faq-item {
      border-radius: 20px;
      background: #fff;
      border: 1px solid var(--color-border);
      box-shadow: var(--shadow-sm);
      overflow: hidden;
      transition: border-color var(--ease), box-shadow var(--ease);
    }

    .faq-item:hover {
      border-color: rgba(166, 77, 255, .28);
      box-shadow: var(--shadow-md);
    }

    .faq-question {
      width: 100%;
      min-height: 62px;
      padding: 18px 20px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 18px;
      color: var(--color-primary);
      text-align: left;
      font-weight: 900;
      font-size: 16px;
    }

    .faq-question .plus {
      width: 28px;
      height: 28px;
      flex: 0 0 auto;
      border-radius: 999px;
      display: grid;
      place-items: center;
      background: var(--color-accent-soft);
      color: var(--color-accent);
      transition: transform var(--ease);
    }

    .faq-answer {
      max-height: 0;
      overflow: hidden;
      transition: max-height .28s ease;
    }

    .faq-answer p {
      padding: 0 20px 20px;
      color: var(--color-muted);
      font-size: 15px;
      line-height: 1.8;
    }

    .faq-item.is-open .faq-answer {
      max-height: 220px;
    }

    .faq-item.is-open .plus {
      transform: rotate(45deg);
    }

    .cta {
      padding: 72px 0 88px;
    }

    .cta-box {
      display: grid;
      grid-template-columns: minmax(0, 1fr) auto;
      gap: 28px;
      align-items: center;
      padding: 36px;
      border-radius: 32px;
      background:
        linear-gradient(135deg, rgba(43, 27, 63, .96), rgba(91, 45, 125, .94)),
        url("/assets/images/backpic/back-3.webp") center/cover no-repeat;
      color: #fff;
      box-shadow: var(--shadow-md);
      overflow: hidden;
      position: relative;
    }

    .cta-box::after {
      content: "";
      position: absolute;
      width: 220px;
      height: 220px;
      right: -80px;
      top: -90px;
      border-radius: 999px;
      background: rgba(255, 177, 92, .28);
    }

    .cta-box h2 {
      font-size: clamp(26px, 3vw, 36px);
      line-height: 1.25;
      margin-bottom: 10px;
      position: relative;
      z-index: 1;
    }

    .cta-box p {
      color: rgba(255, 255, 255, .76);
      max-width: 720px;
      position: relative;
      z-index: 1;
    }

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

    .cta-actions .btn-secondary {
      background: rgba(255, 255, 255, .12);
      color: #fff;
      border-color: rgba(255, 255, 255, .24);
    }

    .cta-actions .btn-secondary:hover {
      background: rgba(255, 255, 255, .2);
      border-color: rgba(255, 255, 255, .42);
    }

    .site-footer {
      background: var(--color-primary);
      color: #fff;
      padding: 58px 0 24px;
    }

    .footer-grid {
      display: grid;
      grid-template-columns: 1.2fr .8fr .8fr;
      gap: 34px;
      padding-bottom: 34px;
      border-bottom: 1px solid rgba(255, 255, 255, .12);
    }

    .footer-brand {
      display: inline-flex;
      align-items: center;
      gap: 11px;
      margin-bottom: 16px;
      font-weight: 900;
      font-size: 18px;
    }

    .footer-brand .brand-mark {
      box-shadow: none;
      background: linear-gradient(135deg, var(--color-accent), var(--color-warm));
    }

    .footer-about p,
    .footer-col p {
      color: rgba(255, 255, 255, .68);
      font-size: 14px;
      line-height: 1.85;
    }

    .footer-col h3 {
      font-size: 16px;
      margin-bottom: 14px;
    }

    .footer-links {
      display: grid;
      gap: 9px;
    }

    .footer-links a {
      color: rgba(255, 255, 255, .72);
      font-size: 14px;
    }

    .footer-links a:hover {
      color: var(--color-warm);
      transform: translateX(3px);
    }

    .footer-bottom {
      display: flex;
      justify-content: space-between;
      gap: 18px;
      padding-top: 22px;
      color: rgba(255, 255, 255, .58);
      font-size: 13px;
      flex-wrap: wrap;
    }

    .back-top {
      position: fixed;
      right: 22px;
      bottom: 22px;
      width: 46px;
      height: 46px;
      border-radius: 16px;
      display: grid;
      place-items: center;
      background: var(--color-primary);
      color: #fff;
      box-shadow: 0 16px 32px rgba(43, 27, 63, .22);
      opacity: 0;
      pointer-events: none;
      transform: translateY(10px);
      transition: opacity var(--ease), transform var(--ease), background var(--ease);
      z-index: 40;
    }

    .back-top.is-visible {
      opacity: 1;
      pointer-events: auto;
      transform: translateY(0);
    }

    .back-top:hover {
      background: var(--color-accent);
    }

    @media (max-width: 1100px) {
      .container {
        width: min(100% - 48px, var(--container));
      }

      .nav-links,
      .nav-action .desktop-cta {
        display: none;
      }

      .menu-toggle {
        display: inline-block;
      }

      .mobile-panel.is-open {
        display: block;
      }

      .hero-shell,
      .steps-layout,
      .latest-layout,
      .trust-layout,
      .faq-grid,
      .cta-box {
        grid-template-columns: 1fr;
      }

      .trust-copy,
      .side-panel {
        position: static;
      }

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

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

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

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

      .mini-feature img {
        height: 180px;
      }
    }

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

      .section {
        padding: 56px 0;
      }

      .nav-wrap {
        height: 66px;
      }

      .brand-text {
        max-width: 230px;
        font-size: 14px;
      }

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

      .hero {
        padding: 62px 0 32px;
      }

      .hero-subtitle {
        font-size: 16px;
      }

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

      .btn {
        width: 100%;
      }

      .screen {
        min-height: 240px;
      }

      .info-strip,
      .neutral-data,
      .mini-stack,
      .section-head {
        grid-template-columns: 1fr;
      }

      .step-card {
        grid-template-columns: 58px 1fr;
      }

      .step-icon {
        grid-column: 1 / -1;
        width: 100%;
        height: 44px;
      }

      .large-image {
        height: 260px;
      }

      .post-bottom,
      .post-top {
        align-items: flex-start;
        flex-direction: column;
      }

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

    @media (max-width: 520px) {
      .container {
        width: min(100% - 28px, var(--container));
      }

      .hero h1 {
        letter-spacing: -.025em;
      }

      .video-board {
        padding: 12px;
        border-radius: 24px;
      }

      .board-item {
        grid-template-columns: 38px 1fr;
      }

      .board-item .badge {
        grid-column: 1 / -1;
        justify-self: start;
      }

      .step-card,
      .timeline-item {
        grid-template-columns: 1fr;
      }

      .step-no,
      .timeline-dot {
        width: 46px;
        height: 46px;
      }

      .large-overlay {
        left: 18px;
        right: 18px;
        bottom: 18px;
      }

      .large-overlay h3 {
        font-size: 22px;
      }

      .feature-body,
      .trust-copy,
      .side-panel,
      .faq-intro,
      .cta-box {
        padding: 22px;
        border-radius: 24px;
      }

      .back-top {
        right: 14px;
        bottom: 14px;
      }
    }

/* roulang page: article */
:root {
      --color-primary: #2B1B3F;
      --color-primary-soft: #47305f;
      --color-accent: #A64DFF;
      --color-accent-soft: rgba(166, 77, 255, .12);
      --color-warm: #FFB15C;
      --color-warm-soft: rgba(255, 177, 92, .16);
      --color-bg: #F7F5FA;
      --color-bg-alt: #EEE8F6;
      --color-card: #ffffff;
      --color-text: #231F2E;
      --color-muted: #6D6578;
      --color-faint: #9A92A5;
      --color-border: #E3DCEB;
      --radius-sm: 12px;
      --radius-md: 18px;
      --radius-lg: 24px;
      --radius-xl: 32px;
      --shadow-sm: 0 10px 28px rgba(43, 27, 63, .08);
      --shadow-md: 0 18px 48px rgba(43, 27, 63, .12);
      --shadow-glow: 0 16px 44px rgba(166, 77, 255, .22);
      --container: 1220px;
      --ease: .22s ease;
    }

    * {
      box-sizing: border-box;
    }

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

    body {
      min-height: 100vh;
      margin: 0;
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", Arial, sans-serif;
      color: var(--color-text);
      background:
        radial-gradient(circle at 10% 4%, rgba(166, 77, 255, .13), transparent 32%),
        radial-gradient(circle at 92% 12%, rgba(255, 177, 92, .14), transparent 30%),
        var(--color-bg);
      line-height: 1.75;
      overflow-x: hidden;
    }

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

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

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

    button,
    input,
    textarea {
      font: inherit;
    }

    button {
      border: 0;
      cursor: pointer;
      background: transparent;
    }

    :focus-visible {
      outline: 3px solid rgba(166, 77, 255, .38);
      outline-offset: 3px;
      border-radius: 12px;
    }

    .container {
      width: min(100% - 64px, var(--container));
      margin-inline: auto;
    }

    .section {
      padding: 86px 0;
      position: relative;
    }

    .section.alt {
      background: linear-gradient(180deg, rgba(238, 232, 246, .72), rgba(247, 245, 250, .88));
    }

    .eyebrow {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      padding: 7px 12px;
      border: 1px solid rgba(166, 77, 255, .22);
      border-radius: 999px;
      color: var(--color-primary);
      background: rgba(255, 255, 255, .76);
      font-size: 13px;
      font-weight: 700;
      box-shadow: 0 8px 20px rgba(43, 27, 63, .05);
    }

    .eyebrow::before {
      content: "";
      width: 8px;
      height: 8px;
      border-radius: 999px;
      background: var(--color-warm);
      box-shadow: 0 0 0 5px rgba(255, 177, 92, .16);
    }

    .section-head {
      display: grid;
      grid-template-columns: minmax(0, 1fr) minmax(280px, 430px);
      gap: 28px;
      align-items: end;
      margin-bottom: 34px;
    }

    .section-title {
      margin: 14px 0 0;
      font-size: clamp(26px, 3vw, 36px);
      line-height: 1.25;
      letter-spacing: -.02em;
      color: var(--color-primary);
      font-weight: 800;
    }

    .section-desc {
      color: var(--color-muted);
      font-size: 16px;
      line-height: 1.85;
      margin: 0;
    }

    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 9px;
      min-height: 48px;
      padding: 12px 20px;
      border-radius: 18px;
      font-weight: 800;
      border: 1px solid transparent;
      line-height: 1;
      white-space: nowrap;
      user-select: none;
      transition: transform var(--ease), box-shadow var(--ease), background var(--ease), border-color var(--ease), color var(--ease);
    }

    .btn-primary {
      background: var(--color-primary);
      color: #fff;
      box-shadow: 0 14px 30px rgba(43, 27, 63, .22);
    }

    .btn-primary:hover {
      background: var(--color-accent);
      color: #fff;
      transform: translateY(-2px);
      box-shadow: var(--shadow-glow);
    }

    .btn-secondary {
      background: rgba(255, 255, 255, .86);
      color: var(--color-primary);
      border-color: var(--color-border);
    }

    .btn-secondary:hover {
      background: var(--color-bg-alt);
      border-color: rgba(166, 77, 255, .34);
      color: var(--color-primary);
      transform: translateY(-2px);
    }

    .btn:active {
      transform: translateY(0) scale(.99);
    }

    .badge {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      padding: 5px 10px;
      border-radius: 999px;
      font-size: 12px;
      font-weight: 800;
      color: var(--color-primary);
      background: var(--color-accent-soft);
      border: 1px solid rgba(166, 77, 255, .18);
    }

    .badge.warm {
      background: var(--color-warm-soft);
      border-color: rgba(255, 177, 92, .3);
    }

    .site-header {
      position: sticky;
      top: 0;
      z-index: 50;
      background: rgba(255, 255, 255, .86);
      backdrop-filter: blur(16px);
      border-bottom: 1px solid rgba(227, 220, 235, .82);
    }

    .nav-wrap {
      height: 74px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 22px;
    }

    .brand {
      display: inline-flex;
      align-items: center;
      gap: 11px;
      min-width: 0;
      font-weight: 900;
      color: var(--color-primary);
      letter-spacing: -.02em;
    }

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

    .brand-mark {
      width: 42px;
      height: 42px;
      flex: 0 0 auto;
      border-radius: 15px;
      display: grid;
      place-items: center;
      background: linear-gradient(135deg, var(--color-primary), var(--color-accent));
      box-shadow: 0 14px 28px rgba(43, 27, 63, .22);
      color: #fff;
    }

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

    .brand-text {
      max-width: 330px;
      font-size: 17px;
      line-height: 1.25;
      overflow: hidden;
      text-overflow: ellipsis;
      white-space: nowrap;
    }

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

    .nav-links a {
      display: inline-flex;
      align-items: center;
      min-height: 42px;
      padding: 9px 13px;
      border-radius: 14px;
      color: var(--color-muted);
      font-size: 15px;
      font-weight: 700;
    }

    .nav-links a:hover,
    .nav-links a.active {
      color: var(--color-primary);
      background: var(--color-accent-soft);
    }

    .nav-action {
      display: flex;
      align-items: center;
      gap: 10px;
    }

    .desktop-cta {
      min-height: 44px;
      padding: 11px 16px;
      border-radius: 16px;
      font-size: 14px;
    }

    .menu-toggle {
      display: none;
      width: 46px;
      height: 46px;
      border-radius: 15px;
      border: 1px solid var(--color-border);
      background: #fff;
      align-items: center;
      justify-content: center;
      flex-direction: column;
      gap: 5px;
      transition: background var(--ease), border-color var(--ease), box-shadow var(--ease);
    }

    .menu-toggle span {
      display: block;
      width: 19px;
      height: 2px;
      border-radius: 99px;
      background: var(--color-primary);
      transition: transform var(--ease), opacity var(--ease);
    }

    .menu-toggle:hover {
      background: var(--color-bg-alt);
      border-color: rgba(166, 77, 255, .34);
      box-shadow: var(--shadow-sm);
    }

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

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

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

    .mobile-panel {
      display: none;
      border-top: 1px solid rgba(227, 220, 235, .8);
      background: rgba(255, 255, 255, .96);
    }

    .mobile-panel .container {
      padding: 12px 0 18px;
      display: grid;
      gap: 8px;
    }

    .mobile-panel a {
      min-height: 46px;
      display: flex;
      align-items: center;
      padding: 10px 14px;
      border-radius: 14px;
      color: var(--color-primary);
      font-weight: 800;
      background: rgba(247, 245, 250, .78);
    }

    .mobile-panel a:hover,
    .mobile-panel a.active {
      background: var(--color-accent-soft);
      color: var(--color-primary);
    }

    .article-hero {
      position: relative;
      overflow: hidden;
      padding: 70px 0 54px;
      background:
        linear-gradient(110deg, rgba(43, 27, 63, .94), rgba(71, 48, 95, .82)),
        url('/assets/images/backpic/back-2.jpg') center/cover no-repeat;
      color: #fff;
    }

    .article-hero::after {
      content: "";
      position: absolute;
      inset: auto -8% -48% 54%;
      height: 280px;
      border-radius: 999px;
      background: rgba(166, 77, 255, .25);
      filter: blur(22px);
      transform: rotate(-8deg);
      pointer-events: none;
    }

    .breadcrumb-wrap {
      position: relative;
      z-index: 1;
      display: flex;
      flex-wrap: wrap;
      gap: 9px;
      align-items: center;
      margin-bottom: 24px;
      color: rgba(255, 255, 255, .72);
      font-size: 14px;
    }

    .breadcrumb-wrap a {
      color: rgba(255, 255, 255, .82);
      border-bottom: 1px solid transparent;
    }

    .breadcrumb-wrap a:hover {
      color: #fff;
      border-color: rgba(255, 177, 92, .7);
    }

    .breadcrumb-sep {
      color: rgba(255, 255, 255, .42);
    }

    .article-hero-grid {
      position: relative;
      z-index: 1;
      display: grid;
      grid-template-columns: minmax(0, 1fr) 360px;
      gap: 42px;
      align-items: center;
    }

    .article-kicker {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      padding: 7px 12px;
      border-radius: 999px;
      color: #fff;
      background: rgba(255, 255, 255, .12);
      border: 1px solid rgba(255, 255, 255, .18);
      font-size: 13px;
      font-weight: 800;
      backdrop-filter: blur(10px);
    }

    .article-kicker::before {
      content: "";
      width: 8px;
      height: 8px;
      border-radius: 999px;
      background: var(--color-warm);
      box-shadow: 0 0 0 5px rgba(255, 177, 92, .16);
    }

    .article-title {
      max-width: 860px;
      margin: 18px 0 18px;
      font-size: clamp(30px, 4.2vw, 52px);
      line-height: 1.18;
      letter-spacing: -.03em;
      font-weight: 900;
      color: #fff;
    }

    .article-summary {
      max-width: 820px;
      margin: 0;
      color: rgba(255, 255, 255, .82);
      font-size: 17px;
      line-height: 1.9;
    }

    .article-meta {
      margin-top: 24px;
      display: flex;
      flex-wrap: wrap;
      gap: 10px;
      align-items: center;
    }

    .meta-pill {
      display: inline-flex;
      align-items: center;
      gap: 7px;
      min-height: 34px;
      padding: 7px 11px;
      border-radius: 999px;
      font-size: 13px;
      font-weight: 800;
      color: rgba(255, 255, 255, .9);
      background: rgba(255, 255, 255, .12);
      border: 1px solid rgba(255, 255, 255, .16);
    }

    .hero-side-card {
      border-radius: var(--radius-xl);
      padding: 16px;
      background: rgba(255, 255, 255, .13);
      border: 1px solid rgba(255, 255, 255, .2);
      box-shadow: 0 26px 70px rgba(0, 0, 0, .24);
      backdrop-filter: blur(14px);
    }

    .hero-cover {
      position: relative;
      overflow: hidden;
      border-radius: 24px;
      min-height: 250px;
      background: var(--color-primary);
    }

    .hero-cover img {
      width: 100%;
      height: 250px;
      object-fit: cover;
      opacity: .78;
    }

    .hero-cover .play-layer {
      position: absolute;
      inset: 0;
      display: grid;
      place-items: center;
      background: linear-gradient(180deg, rgba(43, 27, 63, .08), rgba(43, 27, 63, .56));
    }

    .play-button {
      width: 66px;
      height: 66px;
      border-radius: 50%;
      display: grid;
      place-items: center;
      color: #fff;
      background: rgba(255, 255, 255, .18);
      border: 1px solid rgba(255, 255, 255, .34);
      box-shadow: 0 18px 36px rgba(0, 0, 0, .22);
    }

    .play-button svg {
      width: 26px;
      height: 26px;
      margin-left: 3px;
    }

    .side-note {
      margin-top: 14px;
      display: grid;
      gap: 9px;
    }

    .side-note-row {
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 12px;
      padding: 10px 12px;
      border-radius: 16px;
      background: rgba(255, 255, 255, .12);
      color: rgba(255, 255, 255, .86);
      font-size: 13px;
      font-weight: 700;
    }

    .side-note-row span:last-child {
      color: var(--color-warm);
    }

    .article-shell {
      padding: 66px 0 0;
    }

    .article-layout {
      display: grid;
      grid-template-columns: minmax(0, 820px) minmax(280px, 340px);
      gap: 40px;
      align-items: start;
    }

    .article-card {
      background: rgba(255, 255, 255, .92);
      border: 1px solid rgba(227, 220, 235, .86);
      border-radius: var(--radius-xl);
      box-shadow: var(--shadow-md);
      overflow: hidden;
    }

    .article-body {
      padding: 42px;
      font-size: 17px;
      line-height: 1.85;
      color: var(--color-text);
    }

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

    .article-body h2 {
      position: relative;
      margin: 38px 0 16px;
      padding-left: 16px;
      color: var(--color-primary);
      font-size: clamp(24px, 2.5vw, 30px);
      line-height: 1.28;
      font-weight: 850;
    }

    .article-body h2::before {
      content: "";
      position: absolute;
      left: 0;
      top: .23em;
      width: 5px;
      height: 1.1em;
      border-radius: 99px;
      background: linear-gradient(180deg, var(--color-accent), var(--color-warm));
    }

    .article-body h3 {
      margin: 30px 0 12px;
      color: var(--color-primary-soft);
      font-size: 22px;
      line-height: 1.35;
      font-weight: 800;
    }

    .article-body h4 {
      margin: 24px 0 10px;
      color: var(--color-primary);
      font-size: 19px;
      font-weight: 800;
    }

    .article-body ul,
    .article-body ol {
      margin: 0 0 20px;
      padding-left: 1.35em;
    }

    .article-body li {
      margin: 8px 0;
      padding-left: 3px;
    }

    .article-body blockquote {
      margin: 26px 0;
      padding: 18px 20px;
      border-left: 5px solid var(--color-accent);
      border-radius: 0 18px 18px 0;
      background: rgba(166, 77, 255, .09);
      color: var(--color-primary-soft);
    }

    .article-body a {
      color: var(--color-primary);
      font-weight: 800;
      border-bottom: 1px solid rgba(166, 77, 255, .35);
      background: linear-gradient(180deg, transparent 58%, rgba(166, 77, 255, .12) 0);
    }

    .article-body a:hover {
      color: var(--color-accent);
      border-bottom-color: var(--color-accent);
    }

    .article-body img {
      margin: 28px auto;
      border-radius: 20px;
      box-shadow: var(--shadow-sm);
      border: 1px solid var(--color-border);
    }

    .article-body table {
      width: 100%;
      border-collapse: collapse;
      margin: 28px 0;
      overflow: hidden;
      border-radius: 18px;
      box-shadow: 0 0 0 1px var(--color-border);
      background: #fff;
    }

    .article-body th,
    .article-body td {
      padding: 13px 15px;
      border-bottom: 1px solid var(--color-border);
      text-align: left;
      vertical-align: top;
    }

    .article-body th {
      color: var(--color-primary);
      background: var(--color-bg-alt);
      font-weight: 850;
    }

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

    .content-not-found {
      padding: 42px;
      text-align: center;
    }

    .content-not-found .empty-icon {
      width: 72px;
      height: 72px;
      margin: 0 auto 18px;
      display: grid;
      place-items: center;
      border-radius: 24px;
      color: var(--color-primary);
      background: var(--color-warm-soft);
      border: 1px solid rgba(255, 177, 92, .28);
      font-size: 30px;
      font-weight: 900;
    }

    .content-not-found h2 {
      margin: 0 0 10px;
      color: var(--color-primary);
      font-size: 28px;
      font-weight: 900;
    }

    .content-not-found p {
      margin: 0 auto 22px;
      max-width: 520px;
      color: var(--color-muted);
    }

    .article-after {
      padding: 0 42px 42px;
    }

    .article-actions {
      border-top: 1px solid var(--color-border);
      padding-top: 24px;
      display: flex;
      flex-wrap: wrap;
      align-items: center;
      justify-content: space-between;
      gap: 16px;
    }

    .share-hint {
      color: var(--color-muted);
      font-size: 14px;
      margin: 0;
    }

    .side-stack {
      position: sticky;
      top: 96px;
      display: grid;
      gap: 18px;
    }

    .side-card {
      background: rgba(255, 255, 255, .88);
      border: 1px solid rgba(227, 220, 235, .9);
      border-radius: var(--radius-lg);
      padding: 22px;
      box-shadow: var(--shadow-sm);
    }

    .side-card:hover {
      border-color: rgba(166, 77, 255, .32);
      box-shadow: var(--shadow-md);
    }

    .side-card h2,
    .side-card h3 {
      margin: 0 0 12px;
      color: var(--color-primary);
      font-size: 20px;
      line-height: 1.35;
      font-weight: 850;
    }

    .side-card p {
      margin: 0;
      color: var(--color-muted);
      font-size: 14px;
      line-height: 1.75;
    }

    .toc-list {
      display: grid;
      gap: 10px;
      margin-top: 16px;
    }

    .toc-list a {
      display: flex;
      align-items: center;
      gap: 10px;
      min-height: 42px;
      padding: 10px 12px;
      border-radius: 14px;
      color: var(--color-primary);
      background: var(--color-bg);
      font-size: 14px;
      font-weight: 800;
    }

    .toc-list a::before {
      content: "";
      width: 7px;
      height: 7px;
      border-radius: 999px;
      background: var(--color-accent);
      flex: 0 0 auto;
    }

    .toc-list a:hover {
      background: var(--color-accent-soft);
      transform: translateX(2px);
    }

    .mini-info {
      display: grid;
      gap: 12px;
      margin-top: 16px;
    }

    .mini-info li {
      list-style: none;
      display: flex;
      justify-content: space-between;
      gap: 12px;
      padding: 10px 0;
      border-bottom: 1px solid var(--color-border);
      color: var(--color-muted);
      font-size: 14px;
    }

    .mini-info li:last-child {
      border-bottom: 0;
    }

    .mini-info strong {
      color: var(--color-primary);
      font-weight: 850;
    }

    .guide-grid {
      display: grid;
      grid-template-columns: 1.05fr .95fr;
      gap: 26px;
      align-items: stretch;
    }

    .guide-visual {
      position: relative;
      min-height: 370px;
      overflow: hidden;
      border-radius: var(--radius-xl);
      box-shadow: var(--shadow-md);
      background: var(--color-primary);
    }

    .guide-visual img {
      width: 100%;
      height: 100%;
      min-height: 370px;
      object-fit: cover;
      opacity: .82;
    }

    .guide-visual-caption {
      position: absolute;
      left: 22px;
      right: 22px;
      bottom: 22px;
      padding: 20px;
      border-radius: 22px;
      background: rgba(43, 27, 63, .78);
      color: #fff;
      backdrop-filter: blur(12px);
    }

    .guide-visual-caption h3 {
      margin: 0 0 8px;
      font-size: 22px;
      font-weight: 900;
    }

    .guide-visual-caption p {
      margin: 0;
      color: rgba(255, 255, 255, .78);
      font-size: 14px;
      line-height: 1.75;
    }

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

    .guide-item {
      padding: 20px;
      border-radius: 22px;
      background: rgba(255, 255, 255, .9);
      border: 1px solid var(--color-border);
      box-shadow: var(--shadow-sm);
      transition: transform var(--ease), border-color var(--ease), box-shadow var(--ease);
    }

    .guide-item:hover {
      transform: translateY(-4px);
      border-color: rgba(166, 77, 255, .34);
      box-shadow: var(--shadow-md);
    }

    .guide-item h3 {
      margin: 0 0 8px;
      color: var(--color-primary);
      font-size: 20px;
      font-weight: 850;
    }

    .guide-item p {
      margin: 0;
      color: var(--color-muted);
      font-size: 15px;
      line-height: 1.8;
    }

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

    .related-card {
      display: flex;
      min-height: 100%;
      flex-direction: column;
      padding: 22px;
      border-radius: var(--radius-lg);
      background: rgba(255, 255, 255, .92);
      border: 1px solid var(--color-border);
      box-shadow: var(--shadow-sm);
      transition: transform var(--ease), box-shadow var(--ease), border-color var(--ease);
    }

    .related-card:hover {
      transform: translateY(-4px);
      border-color: rgba(166, 77, 255, .35);
      box-shadow: var(--shadow-md);
      color: inherit;
    }

    .related-card h3 {
      margin: 12px 0 10px;
      color: var(--color-primary);
      font-size: 20px;
      line-height: 1.38;
      font-weight: 850;
    }

    .related-card p {
      margin: 0 0 18px;
      color: var(--color-muted);
      font-size: 15px;
      line-height: 1.75;
    }

    .related-card .card-foot {
      margin-top: auto;
      display: flex;
      justify-content: space-between;
      gap: 12px;
      align-items: center;
      color: var(--color-faint);
      font-size: 13px;
      font-weight: 700;
    }

    .related-card .read-more {
      color: var(--color-primary);
      font-weight: 900;
    }

    .faq-wrap {
      display: grid;
      gap: 14px;
      max-width: 900px;
      margin-inline: auto;
    }

    .faq-item {
      overflow: hidden;
      border-radius: 22px;
      border: 1px solid var(--color-border);
      background: rgba(255, 255, 255, .9);
      box-shadow: var(--shadow-sm);
      transition: border-color var(--ease), box-shadow var(--ease), transform var(--ease);
    }

    .faq-item:hover {
      border-color: rgba(166, 77, 255, .32);
      box-shadow: var(--shadow-md);
      transform: translateY(-2px);
    }

    .faq-question {
      width: 100%;
      min-height: 62px;
      padding: 18px 22px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 18px;
      color: var(--color-primary);
      text-align: left;
      font-size: 17px;
      font-weight: 850;
    }

    .faq-question .plus {
      width: 30px;
      height: 30px;
      flex: 0 0 auto;
      display: grid;
      place-items: center;
      border-radius: 50%;
      background: var(--color-accent-soft);
      color: var(--color-primary);
      transition: transform var(--ease), background var(--ease);
    }

    .faq-question[aria-expanded="true"] .plus {
      transform: rotate(45deg);
      background: var(--color-warm-soft);
    }

    .faq-answer {
      display: none;
      padding: 0 22px 20px;
      color: var(--color-muted);
      line-height: 1.8;
      font-size: 15px;
    }

    .faq-item.is-open .faq-answer {
      display: block;
    }

    .cta-box {
      position: relative;
      overflow: hidden;
      padding: 44px;
      border-radius: var(--radius-xl);
      background:
        radial-gradient(circle at 8% 20%, rgba(255, 177, 92, .28), transparent 28%),
        linear-gradient(135deg, rgba(43, 27, 63, .97), rgba(85, 45, 121, .94));
      color: #fff;
      box-shadow: var(--shadow-md);
    }

    .cta-box::after {
      content: "";
      position: absolute;
      width: 260px;
      height: 260px;
      right: -80px;
      bottom: -120px;
      border-radius: 50%;
      background: rgba(166, 77, 255, .32);
      filter: blur(6px);
      pointer-events: none;
    }

    .cta-content {
      position: relative;
      z-index: 1;
      display: grid;
      grid-template-columns: minmax(0, 1fr) auto;
      gap: 28px;
      align-items: center;
    }

    .cta-content h2 {
      margin: 0 0 10px;
      font-size: clamp(26px, 3vw, 36px);
      line-height: 1.25;
      font-weight: 900;
    }

    .cta-content p {
      max-width: 720px;
      margin: 0;
      color: rgba(255, 255, 255, .78);
      line-height: 1.85;
    }

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

    .cta-box .btn-secondary {
      background: rgba(255, 255, 255, .12);
      color: #fff;
      border-color: rgba(255, 255, 255, .24);
    }

    .cta-box .btn-secondary:hover {
      background: rgba(255, 255, 255, .2);
      color: #fff;
      border-color: rgba(255, 255, 255, .38);
    }

    .site-footer {
      margin-top: 84px;
      padding: 58px 0 26px;
      background: var(--color-primary);
      color: rgba(255, 255, 255, .84);
    }

    .footer-grid {
      display: grid;
      grid-template-columns: minmax(0, 1.3fr) minmax(180px, .65fr) minmax(260px, .9fr);
      gap: 34px;
      align-items: start;
    }

    .footer-brand {
      display: inline-flex;
      align-items: center;
      gap: 12px;
      color: #fff;
      font-size: 18px;
      font-weight: 900;
      margin-bottom: 16px;
    }

    .footer-brand .brand-mark {
      width: 38px;
      height: 38px;
      border-radius: 14px;
      box-shadow: none;
    }

    .footer-about p,
    .footer-col p {
      margin: 0;
      max-width: 560px;
      color: rgba(255, 255, 255, .68);
      font-size: 14px;
      line-height: 1.85;
    }

    .footer-col h3 {
      margin: 0 0 16px;
      color: #fff;
      font-size: 17px;
      font-weight: 850;
    }

    .footer-links {
      display: grid;
      gap: 9px;
    }

    .footer-links a {
      color: rgba(255, 255, 255, .72);
      font-size: 14px;
      font-weight: 700;
    }

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

    .footer-bottom {
      margin-top: 38px;
      padding-top: 22px;
      border-top: 1px solid rgba(255, 255, 255, .12);
      display: flex;
      justify-content: space-between;
      gap: 18px;
      flex-wrap: wrap;
      color: rgba(255, 255, 255, .58);
      font-size: 13px;
    }

    .back-top {
      position: fixed;
      right: 22px;
      bottom: 22px;
      z-index: 40;
      width: 48px;
      height: 48px;
      display: grid;
      place-items: center;
      border-radius: 16px;
      color: #fff;
      background: var(--color-primary);
      box-shadow: 0 16px 34px rgba(43, 27, 63, .26);
      opacity: 0;
      transform: translateY(12px);
      pointer-events: none;
      transition: opacity var(--ease), transform var(--ease), background var(--ease), box-shadow var(--ease);
    }

    .back-top.is-visible {
      opacity: 1;
      transform: translateY(0);
      pointer-events: auto;
    }

    .back-top:hover {
      background: var(--color-accent);
      color: #fff;
      box-shadow: var(--shadow-glow);
    }

    @media (max-width: 1100px) {
      .article-hero-grid,
      .article-layout,
      .guide-grid {
        grid-template-columns: 1fr;
      }

      .hero-side-card {
        max-width: 560px;
      }

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

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

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

      .footer-about {
        grid-column: 1 / -1;
      }
    }

    @media (max-width: 920px) {
      .container {
        width: min(100% - 48px, var(--container));
      }

      .nav-links,
      .desktop-cta {
        display: none;
      }

      .menu-toggle {
        display: inline-flex;
      }

      .mobile-panel.is-open {
        display: block;
      }

      .section {
        padding: 64px 0;
      }

      .section-head {
        grid-template-columns: 1fr;
        align-items: start;
      }

      .article-hero {
        padding: 54px 0 44px;
      }

      .article-body,
      .content-not-found {
        padding: 32px 28px;
      }

      .article-after {
        padding: 0 28px 32px;
      }

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

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

    @media (max-width: 680px) {
      .container {
        width: min(100% - 32px, var(--container));
      }

      .nav-wrap {
        height: 68px;
      }

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

      .brand-text {
        max-width: 210px;
        font-size: 15px;
      }

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

      .article-meta {
        gap: 8px;
      }

      .meta-pill {
        width: 100%;
        justify-content: center;
      }

      .hero-cover img {
        height: 210px;
      }

      .side-stack,
      .related-wrap {
        grid-template-columns: 1fr;
      }

      .article-card {
        border-radius: 24px;
      }

      .article-body {
        padding: 26px 20px;
        font-size: 16px;
        line-height: 1.78;
      }

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

      .article-body h3 {
        font-size: 20px;
      }

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

      .article-after {
        padding: 0 20px 26px;
      }

      .article-actions {
        align-items: stretch;
        flex-direction: column;
      }

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

      .guide-visual,
      .guide-visual img {
        min-height: 300px;
      }

      .cta-box {
        padding: 30px 22px;
        border-radius: 26px;
      }

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

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

      .footer-bottom {
        display: grid;
      }

      .back-top {
        right: 16px;
        bottom: 16px;
      }
    }

    @media (max-width: 440px) {
      .container {
        width: min(100% - 28px, var(--container));
      }

      .brand-text {
        max-width: 172px;
      }

      .article-hero {
        padding: 42px 0 36px;
      }

      .breadcrumb-wrap {
        font-size: 13px;
      }

      .article-title {
        font-size: 30px;
      }

      .btn {
        width: 100%;
      }

      .side-card,
      .guide-item,
      .related-card {
        padding: 18px;
      }
    }

/* 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}