/* roulang page: index */
:root {
      --color-primary: #1f5eff;
      --color-primary-dark: #1648c7;
      --color-primary-soft: #eaf1ff;
      --color-secondary: #13b8a6;
      --color-accent: #ffb020;
      --color-danger: #ff5a66;
      --color-bg: #f5f8ff;
      --color-surface: #ffffff;
      --color-surface-2: #f8fbff;
      --color-text: #10203f;
      --color-muted: #667391;
      --color-light: #8b96ad;
      --color-border: #dbe5f5;
      --shadow-sm: 0 8px 24px rgba(20, 48, 90, .08);
      --shadow-md: 0 16px 44px rgba(20, 48, 90, .12);
      --shadow-lg: 0 24px 70px rgba(20, 48, 90, .16);
      --radius-sm: 12px;
      --radius-md: 18px;
      --radius-lg: 28px;
      --radius-xl: 36px;
      --container: 1180px;
      --header-height: 76px;
      --ease: cubic-bezier(.2, .8, .2, 1);
    }

    * {
      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 8% 5%, rgba(31, 94, 255, .12), transparent 34%),
        radial-gradient(circle at 85% 18%, rgba(19, 184, 166, .10), transparent 30%),
        linear-gradient(180deg, #ffffff 0%, var(--color-bg) 44%, #ffffff 100%);
      line-height: 1.65;
      overflow-x: hidden;
    }

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

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

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

    button {
      cursor: pointer;
      border: 0;
    }

    input, textarea {
      width: 100%;
      border: 1px solid var(--color-border);
      background: #fff;
      color: var(--color-text);
      border-radius: 14px;
      outline: none;
      transition: border-color .22s var(--ease), box-shadow .22s var(--ease), background .22s var(--ease);
    }

    input:focus, textarea:focus, select:focus, button:focus-visible, a:focus-visible {
      outline: 3px solid rgba(31, 94, 255, .22);
      outline-offset: 3px;
    }

    input:focus, textarea:focus {
      border-color: var(--color-primary);
      box-shadow: 0 0 0 4px rgba(31, 94, 255, .10);
    }

    ::selection {
      color: #fff;
      background: var(--color-primary);
    }

    .container {
      width: min(100% - 40px, var(--container));
      margin-inline: auto;
    }

    .site-header {
      position: sticky;
      top: 0;
      z-index: 50;
      background: rgba(255, 255, 255, .86);
      backdrop-filter: blur(18px);
      border-bottom: 1px solid rgba(219, 229, 245, .78);
    }

    .navbar {
      height: var(--header-height);
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 22px;
    }

    .brand {
      display: inline-flex;
      align-items: center;
      gap: 12px;
      font-weight: 900;
      letter-spacing: -.02em;
      color: var(--color-text);
      white-space: nowrap;
    }

    .brand-mark {
      width: 42px;
      height: 42px;
      display: grid;
      place-items: center;
      border-radius: 14px;
      color: #fff;
      background: linear-gradient(135deg, var(--color-primary), #0cc7b7);
      box-shadow: 0 14px 28px rgba(31, 94, 255, .22);
      font-size: 17px;
    }

    .brand-text {
      font-size: 18px;
      line-height: 1.1;
    }

    .nav-menu {
      display: flex;
      align-items: center;
      gap: 8px;
      list-style: none;
    }

    .nav-item {
      position: relative;
    }

    .nav-link {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      padding: 11px 16px;
      border-radius: 999px;
      color: var(--color-muted);
      font-weight: 700;
      font-size: 15px;
    }

    .nav-link:hover,
    .nav-link.active,
    .nav-item:focus-within .nav-link {
      color: var(--color-primary);
      background: var(--color-primary-soft);
    }

    .mega-panel {
      position: absolute;
      left: 50%;
      top: calc(100% + 14px);
      width: 520px;
      transform: translateX(-50%) translateY(8px);
      opacity: 0;
      visibility: hidden;
      pointer-events: none;
      padding: 18px;
      border: 1px solid var(--color-border);
      border-radius: 22px;
      background: rgba(255, 255, 255, .96);
      box-shadow: var(--shadow-lg);
      transition: opacity .22s var(--ease), transform .22s var(--ease), visibility .22s var(--ease);
    }

    .nav-item:hover .mega-panel,
    .nav-item:focus-within .mega-panel {
      opacity: 1;
      visibility: visible;
      transform: translateX(-50%) translateY(0);
      pointer-events: auto;
    }

    .mega-grid {
      display: grid;
      grid-template-columns: 1.1fr .9fr;
      gap: 14px;
    }

    .mega-card {
      padding: 16px;
      border-radius: 18px;
      background: var(--color-surface-2);
      border: 1px solid rgba(219, 229, 245, .75);
    }

    .mega-card strong {
      display: block;
      margin-bottom: 7px;
      font-size: 15px;
    }

    .mega-card span {
      display: block;
      color: var(--color-muted);
      font-size: 13px;
      line-height: 1.55;
    }

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

    .search-box {
      position: relative;
      width: 230px;
    }

    .search-box input {
      height: 42px;
      padding: 0 42px 0 15px;
      border-radius: 999px;
      background: #f8fbff;
    }

    .search-box svg {
      position: absolute;
      right: 14px;
      top: 50%;
      width: 18px;
      height: 18px;
      color: var(--color-light);
      transform: translateY(-50%);
    }

    .menu-toggle {
      display: none;
    }

    .menu-button {
      display: none;
      width: 44px;
      height: 44px;
      border-radius: 14px;
      align-items: center;
      justify-content: center;
      background: var(--color-primary-soft);
      color: var(--color-primary);
    }

    .menu-button span,
    .menu-button span::before,
    .menu-button span::after {
      display: block;
      width: 20px;
      height: 2px;
      border-radius: 999px;
      background: currentColor;
      transition: transform .22s var(--ease), opacity .22s var(--ease);
      content: "";
    }

    .menu-button span::before {
      transform: translateY(-7px);
    }

    .menu-button span::after {
      transform: translateY(5px);
    }

    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 9px;
      min-height: 46px;
      padding: 12px 18px;
      border-radius: 999px;
      font-weight: 800;
      border: 1px solid transparent;
      transition: transform .22s var(--ease), box-shadow .22s var(--ease), background .22s var(--ease), border-color .22s var(--ease), color .22s var(--ease);
      white-space: nowrap;
    }

    .btn:hover {
      transform: translateY(-2px);
    }

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

    .btn-primary {
      color: #fff;
      background: linear-gradient(135deg, var(--color-primary), #0e8cff);
      box-shadow: 0 14px 28px rgba(31, 94, 255, .24);
    }

    .btn-primary:hover {
      box-shadow: 0 18px 34px rgba(31, 94, 255, .32);
    }

    .btn-secondary {
      color: var(--color-primary);
      background: var(--color-primary-soft);
      border-color: rgba(31, 94, 255, .14);
    }

    .btn-secondary:hover {
      background: #dfeaff;
      border-color: rgba(31, 94, 255, .24);
    }

    .btn-ghost {
      color: var(--color-text);
      background: #fff;
      border-color: var(--color-border);
      box-shadow: var(--shadow-sm);
    }

    .btn-ghost:hover {
      border-color: rgba(31, 94, 255, .25);
      color: var(--color-primary);
    }

    .badge {
      display: inline-flex;
      align-items: center;
      gap: 7px;
      width: fit-content;
      padding: 7px 12px;
      border-radius: 999px;
      font-size: 13px;
      font-weight: 800;
      color: var(--color-primary);
      background: var(--color-primary-soft);
      border: 1px solid rgba(31, 94, 255, .14);
    }

    .badge-dot {
      width: 8px;
      height: 8px;
      border-radius: 50%;
      background: var(--color-secondary);
      box-shadow: 0 0 0 5px rgba(19, 184, 166, .12);
    }

    .section {
      padding: 82px 0;
    }

    .section-head {
      display: flex;
      align-items: end;
      justify-content: space-between;
      gap: 28px;
      margin-bottom: 30px;
    }

    .section-kicker {
      margin-bottom: 10px;
      color: var(--color-primary);
      font-weight: 900;
      font-size: 14px;
      letter-spacing: .08em;
    }

    .section-title {
      font-size: clamp(28px, 4vw, 42px);
      line-height: 1.18;
      letter-spacing: -.04em;
      color: var(--color-text);
    }

    .section-desc {
      max-width: 650px;
      color: var(--color-muted);
      font-size: 16px;
      margin-top: 12px;
    }

    .hero {
      padding: 54px 0 74px;
    }

    .hero-shell {
      display: grid;
      grid-template-columns: minmax(0, 1.05fr) minmax(360px, .95fr);
      gap: 30px;
      align-items: stretch;
      padding: 30px;
      border-radius: var(--radius-xl);
      background:
        linear-gradient(135deg, rgba(255, 255, 255, .96), rgba(247, 251, 255, .9)),
        radial-gradient(circle at 78% 14%, rgba(31, 94, 255, .12), transparent 32%);
      border: 1px solid rgba(219, 229, 245, .95);
      box-shadow: var(--shadow-lg);
    }

    .hero-copy {
      display: flex;
      flex-direction: column;
      justify-content: center;
      min-height: 560px;
      padding: 18px 0 18px 16px;
    }

    .hero-eyebrow {
      display: inline-flex;
      align-items: center;
      gap: 10px;
      width: fit-content;
      margin-bottom: 22px;
      padding: 9px 14px;
      border-radius: 999px;
      background: #fff;
      border: 1px solid var(--color-border);
      box-shadow: var(--shadow-sm);
      color: var(--color-muted);
      font-weight: 800;
      font-size: 14px;
    }

    .hero-eyebrow b {
      color: var(--color-primary);
    }

    .hero h1 {
      max-width: 760px;
      font-size: clamp(38px, 5.8vw, 68px);
      line-height: 1.05;
      letter-spacing: -.065em;
      color: #0d1f42;
    }

    .hero-lead {
      margin-top: 22px;
      max-width: 720px;
      color: var(--color-muted);
      font-size: 18px;
      line-height: 1.85;
    }

    .hero-actions {
      display: flex;
      flex-wrap: wrap;
      gap: 12px;
      margin-top: 30px;
    }

    .hero-metrics {
      display: grid;
      grid-template-columns: repeat(3, minmax(0, 1fr));
      gap: 12px;
      margin-top: 32px;
      max-width: 680px;
    }

    .metric {
      padding: 16px;
      border-radius: 20px;
      background: #fff;
      border: 1px solid var(--color-border);
      box-shadow: var(--shadow-sm);
    }

    .metric strong {
      display: block;
      font-size: 24px;
      line-height: 1.1;
      color: var(--color-primary);
      letter-spacing: -.03em;
    }

    .metric span {
      display: block;
      margin-top: 6px;
      color: var(--color-muted);
      font-size: 13px;
    }

    .whitepaper-stage {
      display: grid;
      grid-template-columns: .78fr 1fr;
      gap: 18px;
      padding: 18px;
      border-radius: 30px;
      background: linear-gradient(180deg, #edf4ff, #ffffff);
      border: 1px solid rgba(219, 229, 245, .95);
      min-height: 560px;
    }

    .paper-cover {
      position: relative;
      overflow: hidden;
      min-height: 500px;
      border-radius: 26px;
      color: #fff;
      background:
        linear-gradient(160deg, rgba(10, 35, 85, .95), rgba(31, 94, 255, .92)),
        radial-gradient(circle at 30% 10%, rgba(255, 255, 255, .22), transparent 30%);
      box-shadow: 0 22px 45px rgba(31, 94, 255, .25);
      padding: 26px;
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }

    .paper-cover::before {
      content: "";
      position: absolute;
      inset: auto -46px 80px auto;
      width: 170px;
      height: 170px;
      border-radius: 42px;
      background: rgba(255, 255, 255, .13);
      transform: rotate(25deg);
    }

    .paper-cover::after {
      content: "";
      position: absolute;
      left: 24px;
      bottom: 118px;
      width: 72%;
      height: 1px;
      background: rgba(255, 255, 255, .25);
    }

    .paper-cover small {
      position: relative;
      z-index: 1;
      opacity: .82;
      font-weight: 800;
      letter-spacing: .08em;
    }

    .paper-cover h2 {
      position: relative;
      z-index: 1;
      margin-top: 20px;
      font-size: 30px;
      line-height: 1.2;
      letter-spacing: -.04em;
    }

    .paper-cover p {
      position: relative;
      z-index: 1;
      margin-top: 14px;
      color: rgba(255, 255, 255, .78);
      font-size: 14px;
    }

    .cover-labels {
      position: relative;
      z-index: 1;
      display: flex;
      flex-wrap: wrap;
      gap: 8px;
    }

    .cover-labels span {
      padding: 7px 10px;
      border-radius: 999px;
      background: rgba(255, 255, 255, .14);
      border: 1px solid rgba(255, 255, 255, .20);
      font-size: 12px;
      font-weight: 800;
    }

    .paper-side {
      display: flex;
      flex-direction: column;
      gap: 14px;
    }

    .toc-card,
    .download-card {
      padding: 20px;
      border-radius: 24px;
      background: #fff;
      border: 1px solid var(--color-border);
      box-shadow: var(--shadow-sm);
    }

    .toc-card h3,
    .download-card h3 {
      font-size: 18px;
      margin-bottom: 14px;
      letter-spacing: -.02em;
    }

    .toc-list {
      display: grid;
      gap: 10px;
      list-style: none;
    }

    .toc-list li {
      display: flex;
      align-items: flex-start;
      gap: 10px;
      padding: 10px 0;
      border-bottom: 1px dashed var(--color-border);
      color: var(--color-muted);
      font-size: 14px;
    }

    .toc-list li:last-child {
      border-bottom: 0;
    }

    .toc-index {
      flex: 0 0 auto;
      width: 26px;
      height: 26px;
      display: grid;
      place-items: center;
      border-radius: 9px;
      background: var(--color-primary-soft);
      color: var(--color-primary);
      font-weight: 900;
      font-size: 12px;
    }

    .mini-form {
      display: grid;
      gap: 10px;
    }

    .mini-form input {
      height: 46px;
      padding: 0 14px;
    }

    .form-note {
      color: var(--color-light);
      font-size: 12px;
      line-height: 1.55;
    }

    .form-message {
      display: none;
      padding: 10px 12px;
      border-radius: 12px;
      color: #0a756d;
      background: rgba(19, 184, 166, .10);
      border: 1px solid rgba(19, 184, 166, .18);
      font-size: 13px;
    }

    .form-message.show {
      display: block;
    }

    .highlight-grid {
      display: grid;
      grid-template-columns: 1.15fr .85fr;
      gap: 22px;
    }

    .feature-panel {
      padding: 28px;
      border-radius: var(--radius-lg);
      background: #fff;
      border: 1px solid var(--color-border);
      box-shadow: var(--shadow-md);
    }

    .feature-panel.main {
      background:
        linear-gradient(135deg, #ffffff 0%, #f4f8ff 100%);
    }

    .feature-list {
      display: grid;
      gap: 14px;
      margin-top: 22px;
      list-style: none;
    }

    .feature-item {
      display: grid;
      grid-template-columns: 46px 1fr;
      gap: 14px;
      align-items: start;
      padding: 16px;
      border-radius: 18px;
      background: #fff;
      border: 1px solid rgba(219, 229, 245, .75);
    }

    .feature-icon {
      width: 46px;
      height: 46px;
      display: grid;
      place-items: center;
      border-radius: 16px;
      color: var(--color-primary);
      background: var(--color-primary-soft);
      font-weight: 900;
    }

    .feature-item h3 {
      font-size: 17px;
      margin-bottom: 4px;
    }

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

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

    .info-card {
      padding: 22px;
      border-radius: 24px;
      background: #fff;
      border: 1px solid var(--color-border);
      box-shadow: var(--shadow-sm);
      transition: transform .22s var(--ease), box-shadow .22s var(--ease), border-color .22s var(--ease);
    }

    .info-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-md);
      border-color: rgba(31, 94, 255, .22);
    }

    .info-card h3 {
      font-size: 18px;
      margin-bottom: 8px;
    }

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

    .time-band {
      display: grid;
      grid-template-columns: 320px 1fr;
      gap: 24px;
      align-items: stretch;
    }

    .time-intro {
      padding: 28px;
      border-radius: var(--radius-lg);
      color: #fff;
      background: linear-gradient(145deg, #10203f, #1f5eff);
      box-shadow: var(--shadow-md);
    }

    .time-intro .section-kicker,
    .time-intro .section-title,
    .time-intro .section-desc {
      color: #fff;
    }

    .time-intro .section-desc {
      color: rgba(255, 255, 255, .78);
    }

    .time-cards {
      display: grid;
      grid-template-columns: repeat(3, minmax(0, 1fr));
      gap: 16px;
    }

    .time-card {
      display: flex;
      flex-direction: column;
      justify-content: space-between;
      min-height: 270px;
      padding: 22px;
      border-radius: 26px;
      background: #fff;
      border: 1px solid var(--color-border);
      box-shadow: var(--shadow-sm);
    }

    .time-card .time {
      color: var(--color-primary);
      font-size: 30px;
      font-weight: 950;
      line-height: 1;
      letter-spacing: -.04em;
    }

    .time-card h3 {
      margin-top: 16px;
      font-size: 19px;
    }

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

    .time-tags {
      display: flex;
      flex-wrap: wrap;
      gap: 8px;
      margin-top: 18px;
    }

    .time-tags span {
      padding: 6px 9px;
      border-radius: 999px;
      color: var(--color-muted);
      background: #f3f6fb;
      font-size: 12px;
      font-weight: 800;
    }

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

    .news-list {
      padding: 10px;
      border-radius: var(--radius-lg);
      background: #fff;
      border: 1px solid var(--color-border);
      box-shadow: var(--shadow-md);
    }

    .news-item {
      display: grid;
      grid-template-columns: 92px 1fr auto;
      gap: 18px;
      align-items: center;
      padding: 20px;
      border-radius: 22px;
      transition: background .22s var(--ease), transform .22s var(--ease);
    }

    .news-item + .news-item {
      border-top: 1px solid #eef3fb;
    }

    .news-item:hover {
      background: #f8fbff;
      transform: translateX(3px);
    }

    .news-date {
      display: grid;
      place-items: center;
      min-height: 64px;
      border-radius: 18px;
      color: var(--color-primary);
      background: var(--color-primary-soft);
      font-weight: 900;
      text-align: center;
      line-height: 1.2;
    }

    .news-date small {
      display: block;
      color: var(--color-muted);
      font-size: 12px;
      font-weight: 800;
    }

    .news-content a {
      font-size: 18px;
      font-weight: 900;
      letter-spacing: -.02em;
    }

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

    .news-content p {
      margin-top: 6px;
      color: var(--color-muted);
      font-size: 14px;
    }

    .arrow-link {
      color: var(--color-primary);
      font-weight: 900;
    }

    .recommend-box {
      padding: 24px;
      border-radius: var(--radius-lg);
      background: #10203f;
      color: #fff;
      box-shadow: var(--shadow-md);
      position: sticky;
      top: 96px;
    }

    .recommend-box h3 {
      font-size: 22px;
      margin-bottom: 10px;
    }

    .recommend-box p {
      color: rgba(255, 255, 255, .74);
      font-size: 14px;
      margin-bottom: 18px;
    }

    .rank-list {
      list-style: none;
      display: grid;
      gap: 12px;
    }

    .rank-list li {
      display: flex;
      align-items: center;
      gap: 12px;
      padding: 12px;
      border-radius: 16px;
      background: rgba(255, 255, 255, .08);
      border: 1px solid rgba(255, 255, 255, .10);
    }

    .rank-list b {
      width: 28px;
      height: 28px;
      display: grid;
      place-items: center;
      border-radius: 10px;
      color: #10203f;
      background: #fff;
      font-size: 13px;
    }

    .rank-list span {
      color: rgba(255, 255, 255, .88);
      font-size: 14px;
      font-weight: 700;
    }

    .lead-section {
      padding-top: 72px;
    }

    .lead-box {
      display: grid;
      grid-template-columns: .9fr 1.1fr;
      gap: 28px;
      padding: 30px;
      border-radius: var(--radius-xl);
      background: linear-gradient(135deg, #ffffff, #eef5ff);
      border: 1px solid var(--color-border);
      box-shadow: var(--shadow-lg);
    }

    .lead-copy {
      padding: 12px 0;
    }

    .lead-points {
      display: grid;
      gap: 12px;
      margin-top: 22px;
      list-style: none;
    }

    .lead-points li {
      display: flex;
      gap: 10px;
      align-items: flex-start;
      color: var(--color-muted);
    }

    .lead-points li::before {
      content: "✓";
      flex: 0 0 auto;
      width: 24px;
      height: 24px;
      display: grid;
      place-items: center;
      border-radius: 50%;
      color: #fff;
      background: var(--color-secondary);
      font-size: 13px;
      font-weight: 900;
      margin-top: 2px;
    }

    .lead-form {
      padding: 24px;
      border-radius: 28px;
      background: #fff;
      border: 1px solid var(--color-border);
      box-shadow: var(--shadow-sm);
    }

    .form-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 14px;
    }

    .form-field.full {
      grid-column: 1 / -1;
    }

    .form-field label {
      display: block;
      margin-bottom: 7px;
      color: var(--color-text);
      font-weight: 800;
      font-size: 14px;
    }

    .form-field input,
    .form-field textarea {
      padding: 13px 14px;
    }

    .form-field textarea {
      min-height: 112px;
      resize: vertical;
    }

    .form-footer {
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 14px;
      margin-top: 16px;
    }

    .directory-grid {
      display: grid;
      grid-template-columns: repeat(4, minmax(0, 1fr));
      gap: 16px;
    }

    .directory-card {
      position: relative;
      overflow: hidden;
      min-height: 230px;
      padding: 22px;
      border-radius: 26px;
      background: #fff;
      border: 1px solid var(--color-border);
      box-shadow: var(--shadow-sm);
      transition: transform .22s var(--ease), box-shadow .22s var(--ease), border-color .22s var(--ease);
    }

    .directory-card:hover {
      transform: translateY(-5px);
      box-shadow: var(--shadow-md);
      border-color: rgba(31, 94, 255, .22);
    }

    .directory-card::after {
      content: "";
      position: absolute;
      right: -35px;
      bottom: -35px;
      width: 120px;
      height: 120px;
      border-radius: 40px;
      background: rgba(31, 94, 255, .08);
      transform: rotate(18deg);
    }

    .directory-card h3 {
      font-size: 19px;
      margin: 14px 0 8px;
    }

    .directory-card p {
      position: relative;
      z-index: 1;
      color: var(--color-muted);
      font-size: 14px;
    }

    .count {
      display: inline-flex;
      align-items: center;
      height: 30px;
      padding: 0 10px;
      border-radius: 999px;
      color: var(--color-primary);
      background: var(--color-primary-soft);
      font-size: 13px;
      font-weight: 900;
    }

    .card-link {
      position: relative;
      z-index: 1;
      display: inline-flex;
      margin-top: 18px;
      color: var(--color-primary);
      font-weight: 900;
    }

    .hot-wrap {
      display: grid;
      grid-template-columns: 1.05fr .95fr;
      gap: 20px;
      align-items: stretch;
    }

    .hot-main {
      min-height: 420px;
      padding: 30px;
      border-radius: var(--radius-lg);
      color: #fff;
      background:
        linear-gradient(145deg, rgba(16, 32, 63, .92), rgba(31, 94, 255, .78)),
        radial-gradient(circle at 80% 10%, rgba(255, 255, 255, .25), transparent 30%);
      box-shadow: var(--shadow-lg);
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }

    .hot-main h3 {
      max-width: 520px;
      font-size: clamp(28px, 4vw, 44px);
      line-height: 1.15;
      letter-spacing: -.04em;
    }

    .hot-main p {
      max-width: 540px;
      margin-top: 14px;
      color: rgba(255, 255, 255, .78);
    }

    .hot-badge {
      display: inline-flex;
      width: fit-content;
      padding: 8px 12px;
      border-radius: 999px;
      color: #10203f;
      background: #fff;
      font-weight: 900;
      font-size: 13px;
    }

    .hot-small-grid {
      display: grid;
      grid-template-columns: repeat(2, minmax(0, 1fr));
      gap: 16px;
    }

    .hot-card {
      padding: 22px;
      border-radius: 26px;
      background: #fff;
      border: 1px solid var(--color-border);
      box-shadow: var(--shadow-sm);
      transition: transform .22s var(--ease), box-shadow .22s var(--ease);
    }

    .hot-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-md);
    }

    .hot-card .tag {
      display: inline-flex;
      margin-bottom: 14px;
      padding: 6px 10px;
      border-radius: 999px;
      color: #9a5b00;
      background: #fff3d6;
      font-weight: 900;
      font-size: 12px;
    }

    .hot-card h3 {
      font-size: 18px;
      margin-bottom: 8px;
    }

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

    .timeline {
      display: grid;
      grid-template-columns: repeat(4, minmax(0, 1fr));
      gap: 16px;
      counter-reset: step;
    }

    .timeline-card {
      position: relative;
      padding: 24px;
      border-radius: 26px;
      background: #fff;
      border: 1px solid var(--color-border);
      box-shadow: var(--shadow-sm);
    }

    .timeline-card::before {
      counter-increment: step;
      content: counter(step, decimal-leading-zero);
      display: inline-flex;
      align-items: center;
      justify-content: center;
      width: 42px;
      height: 42px;
      margin-bottom: 18px;
      border-radius: 14px;
      color: #fff;
      background: var(--color-primary);
      font-weight: 950;
    }

    .timeline-card h3 {
      font-size: 18px;
      margin-bottom: 8px;
    }

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

    .faq-wrap {
      display: grid;
      grid-template-columns: 360px 1fr;
      gap: 28px;
      align-items: start;
    }

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

    .faq-item {
      padding: 20px 22px;
      border-radius: 24px;
      background: #fff;
      border: 1px solid var(--color-border);
      box-shadow: var(--shadow-sm);
    }

    .faq-item summary {
      list-style: none;
      cursor: pointer;
      font-weight: 900;
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 16px;
    }

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

    .faq-item summary::after {
      content: "+";
      flex: 0 0 auto;
      width: 30px;
      height: 30px;
      display: grid;
      place-items: center;
      border-radius: 50%;
      color: var(--color-primary);
      background: var(--color-primary-soft);
      font-size: 20px;
      line-height: 1;
      transition: transform .22s var(--ease);
    }

    .faq-item[open] summary::after {
      content: "−";
      transform: rotate(180deg);
    }

    .faq-item p {
      margin-top: 14px;
      color: var(--color-muted);
      font-size: 15px;
      border-top: 1px dashed var(--color-border);
      padding-top: 14px;
    }

    .trust-strip {
      display: flex;
      flex-wrap: wrap;
      gap: 12px;
      margin-top: 22px;
    }

    .trust-strip span {
      display: inline-flex;
      align-items: center;
      gap: 7px;
      padding: 9px 12px;
      border-radius: 999px;
      color: var(--color-muted);
      background: #fff;
      border: 1px solid var(--color-border);
      box-shadow: var(--shadow-sm);
      font-weight: 800;
      font-size: 13px;
    }

    .site-footer {
      padding: 54px 0 28px;
      background: #0d1d3a;
      color: #fff;
    }

    .footer-top {
      display: grid;
      grid-template-columns: 1fr .9fr;
      gap: 36px;
      padding-bottom: 36px;
      border-bottom: 1px solid rgba(255, 255, 255, .12);
    }

    .footer-brand {
      display: inline-flex;
      align-items: center;
      gap: 12px;
      margin-bottom: 16px;
      font-weight: 950;
      font-size: 20px;
    }

    .footer-brand .brand-mark {
      box-shadow: none;
    }

    .footer-about {
      max-width: 720px;
      color: rgba(255, 255, 255, .72);
    }

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

    .footer-card {
      padding: 18px;
      border-radius: 20px;
      background: rgba(255, 255, 255, .06);
      border: 1px solid rgba(255, 255, 255, .10);
    }

    .footer-card h3 {
      font-size: 16px;
      margin-bottom: 10px;
    }

    .footer-card a,
    .footer-card span {
      display: block;
      color: rgba(255, 255, 255, .68);
      font-size: 14px;
      margin-top: 7px;
    }

    .footer-card a:hover {
      color: #fff;
    }

    .footer-bottom {
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 18px;
      padding-top: 24px;
      color: rgba(255, 255, 255, .58);
      font-size: 13px;
    }

    .footer-bottom a {
      color: rgba(255, 255, 255, .78);
    }

    @media (max-width: 1024px) {
      :root {
        --header-height: 70px;
      }

      .search-box {
        display: none;
      }

      .hero-shell,
      .lead-box,
      .highlight-grid,
      .time-band,
      .news-layout,
      .hot-wrap,
      .faq-wrap {
        grid-template-columns: 1fr;
      }

      .hero-copy {
        min-height: auto;
        padding: 10px 0;
      }

      .whitepaper-stage {
        min-height: auto;
      }

      .paper-cover {
        min-height: 420px;
      }

      .recommend-box {
        position: static;
      }

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

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

    @media (max-width: 768px) {
      .container {
        width: min(100% - 28px, var(--container));
      }

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

      .nav-menu {
        position: fixed;
        left: 14px;
        right: 14px;
        top: calc(var(--header-height) + 10px);
        display: grid;
        gap: 8px;
        padding: 14px;
        border-radius: 22px;
        background: rgba(255, 255, 255, .96);
        border: 1px solid var(--color-border);
        box-shadow: var(--shadow-lg);
        transform: translateY(-12px);
        opacity: 0;
        visibility: hidden;
        pointer-events: none;
      }

      .menu-toggle:checked ~ .nav-menu {
        transform: translateY(0);
        opacity: 1;
        visibility: visible;
        pointer-events: auto;
      }

      .menu-toggle:checked + .menu-button span {
        transform: rotate(45deg);
      }

      .menu-toggle:checked + .menu-button span::before {
        transform: translateY(0) rotate(90deg);
      }

      .menu-toggle:checked + .menu-button span::after {
        opacity: 0;
      }

      .nav-link {
        width: 100%;
        border-radius: 16px;
      }

      .mega-panel {
        position: static;
        width: 100%;
        margin-top: 8px;
        transform: none;
        opacity: 1;
        visibility: visible;
        pointer-events: auto;
        box-shadow: none;
        display: none;
      }

      .nav-item:hover .mega-panel,
      .nav-item:focus-within .mega-panel {
        transform: none;
      }

      .nav-item:focus-within .mega-panel {
        display: block;
      }

      .mega-grid,
      .whitepaper-stage,
      .form-grid,
      .hot-small-grid {
        grid-template-columns: 1fr;
      }

      .nav-actions .btn {
        display: none;
      }

      .section {
        padding: 62px 0;
      }

      .section-head {
        display: block;
      }

      .hero {
        padding: 34px 0 56px;
      }

      .hero-shell {
        padding: 20px;
        border-radius: 28px;
      }

      .hero-metrics,
      .time-cards {
        grid-template-columns: 1fr;
      }

      .news-item {
        grid-template-columns: 70px 1fr;
      }

      .news-item .arrow-link {
        grid-column: 2;
      }

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

    @media (max-width: 520px) {
      .brand-text {
        font-size: 16px;
      }

      .brand-mark {
        width: 38px;
        height: 38px;
        border-radius: 13px;
      }

      .hero h1 {
        font-size: 34px;
      }

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

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

      .btn {
        width: 100%;
      }

      .paper-cover {
        min-height: 360px;
        padding: 22px;
      }

      .paper-cover h2 {
        font-size: 25px;
      }

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

      .directory-grid,
      .timeline,
      .footer-links {
        grid-template-columns: 1fr;
      }

      .lead-box,
      .hero-shell {
        padding: 16px;
      }

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

      .news-date {
        width: 82px;
      }

      .time-intro,
      .feature-panel,
      .lead-form {
        padding: 22px;
      }
    }