/* roulang page: index */
:root {
      --primary: #1769e0;
      --primary-dark: #0d4fb3;
      --primary-soft: #eaf3ff;
      --accent: #15a88a;
      --warning: #f59e0b;
      --ink: #152033;
      --muted: #66758a;
      --light: #f6f9fd;
      --surface: #ffffff;
      --line: #dfe7f1;
      --line-strong: #c9d7e8;
      --dark: #16202e;
      --dark-2: #233145;
      --shadow: 0 14px 34px rgba(24, 55, 90, .10);
      --shadow-soft: 0 8px 24px rgba(24, 55, 90, .08);
      --radius: 8px;
      --container: 1240px;
      --nav-height: 72px;
    }

    * {
      box-sizing: border-box;
    }

    html {
      scroll-behavior: smooth;
    }

    body {
      margin: 0;
      font-family: "Noto Sans SC", "PingFang SC", "Microsoft YaHei", Arial, sans-serif;
      color: var(--ink);
      background: #fff;
      line-height: 1.72;
      font-size: 16px;
    }

    a {
      color: inherit;
      text-decoration: none;
      transition: color .2s ease, background .2s ease, border-color .2s ease, box-shadow .2s ease;
    }

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

    button,
    input,
    textarea {
      font: inherit;
    }

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

    input,
    textarea {
      width: 100%;
      border: 1px solid var(--line);
      border-radius: var(--radius);
      background: #fff;
      color: var(--ink);
      padding: 12px 14px;
      outline: none;
      transition: border-color .2s ease, box-shadow .2s ease;
    }

    input:focus,
    textarea:focus,
    a:focus-visible,
    button:focus-visible {
      outline: 3px solid rgba(23, 105, 224, .22);
      outline-offset: 2px;
    }

    input:focus,
    textarea:focus {
      border-color: var(--primary);
      box-shadow: 0 0 0 4px rgba(23, 105, 224, .10);
    }

    .container {
      width: min(100% - 40px, var(--container));
      margin: 0 auto;
    }

    .site-header {
      position: sticky;
      top: 0;
      z-index: 50;
      background: rgba(255, 255, 255, .96);
      backdrop-filter: blur(16px);
      border-bottom: 1px solid rgba(223, 231, 241, .85);
      box-shadow: 0 8px 24px rgba(24, 55, 90, .04);
    }

    .topbar {
      border-bottom: 1px solid var(--line);
      background: #f8fbff;
      color: var(--muted);
      font-size: 13px;
    }

    .topbar-inner {
      min-height: 38px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 18px;
    }

    .topbar-group {
      display: flex;
      flex-wrap: wrap;
      align-items: center;
      gap: 18px;
    }

    .topbar strong {
      color: var(--ink);
      font-weight: 600;
    }

    .nav-row {
      min-height: var(--nav-height);
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 28px;
    }

    .logo {
      display: inline-flex;
      align-items: center;
      gap: 10px;
      font-size: 20px;
      font-weight: 800;
      color: var(--ink);
      white-space: nowrap;
    }

    .logo-mark {
      width: 38px;
      height: 38px;
      border-radius: 8px;
      background: linear-gradient(135deg, var(--primary), #26b7d3);
      color: #fff;
      display: grid;
      place-items: center;
      font-size: 18px;
      box-shadow: 0 10px 22px rgba(23, 105, 224, .24);
    }

    .main-nav {
      display: flex;
      align-items: center;
      gap: 4px;
      margin-left: auto;
    }

    .main-nav a {
      padding: 11px 13px;
      border-radius: 7px;
      color: #334158;
      font-size: 15px;
      font-weight: 600;
      white-space: nowrap;
    }

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

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

    .menu-toggle {
      display: none;
      width: 44px;
      height: 44px;
      border: 1px solid var(--line);
      border-radius: 8px;
      color: var(--ink);
      background: #fff;
      align-items: center;
      justify-content: center;
      flex-direction: column;
      gap: 5px;
    }

    .menu-toggle span {
      width: 20px;
      height: 2px;
      background: currentColor;
      border-radius: 2px;
      transition: transform .2s ease, opacity .2s ease;
    }

    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      min-height: 44px;
      padding: 11px 18px;
      border-radius: 8px;
      border: 1px solid transparent;
      font-weight: 700;
      line-height: 1.2;
      gap: 8px;
      white-space: nowrap;
      transition: transform .2s ease, background .2s ease, border-color .2s ease, box-shadow .2s ease, color .2s ease;
    }

    .btn:hover {
      transform: translateY(-1px);
    }

    .btn-primary {
      color: #fff;
      background: var(--primary);
      box-shadow: 0 10px 22px rgba(23, 105, 224, .22);
    }

    .btn-primary:hover {
      background: var(--primary-dark);
      box-shadow: 0 14px 28px rgba(23, 105, 224, .28);
    }

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

    .btn-secondary:hover {
      border-color: var(--primary);
      background: var(--primary-soft);
    }

    .btn-ghost {
      color: var(--ink);
      background: #fff;
      border-color: var(--line);
    }

    .btn-ghost:hover {
      color: var(--primary);
      border-color: var(--primary);
      box-shadow: var(--shadow-soft);
    }

    main {
      overflow: hidden;
    }

    section {
      padding: 76px 0;
    }

    .section-muted {
      background: var(--light);
    }

    .section-head {
      max-width: 820px;
      margin-bottom: 34px;
    }

    .section-head.center {
      margin-left: auto;
      margin-right: auto;
      text-align: center;
    }

    .eyebrow {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      min-height: 28px;
      padding: 4px 10px;
      border-radius: 999px;
      background: var(--primary-soft);
      color: var(--primary);
      font-size: 13px;
      font-weight: 700;
      margin-bottom: 14px;
    }

    .eyebrow::before {
      content: "";
      width: 7px;
      height: 7px;
      border-radius: 50%;
      background: var(--accent);
    }

    h1,
    h2,
    h3,
    p {
      margin-top: 0;
    }

    h1 {
      font-size: 46px;
      line-height: 1.18;
      margin-bottom: 18px;
      letter-spacing: 0;
    }

    h2 {
      font-size: 34px;
      line-height: 1.25;
      margin-bottom: 14px;
      letter-spacing: 0;
    }

    h3 {
      font-size: 20px;
      line-height: 1.35;
      margin-bottom: 10px;
      letter-spacing: 0;
    }

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

    .hero {
      position: relative;
      min-height: 670px;
      display: flex;
      align-items: center;
      padding: 64px 0 58px;
      background: #eef6ff;
    }

    .hero-slider {
      position: absolute;
      inset: 0;
      z-index: 0;
    }

    .hero-slide {
      position: absolute;
      inset: 0;
      opacity: 0;
      transition: opacity .5s ease;
      background-position: center;
      background-size: cover;
    }

    .hero-slide.active {
      opacity: 1;
    }

    .hero-slide::after {
      content: "";
      position: absolute;
      inset: 0;
      background: linear-gradient(90deg, rgba(255, 255, 255, .98) 0%, rgba(255, 255, 255, .88) 48%, rgba(255, 255, 255, .54) 100%);
    }

    .hero-content {
      position: relative;
      z-index: 1;
      display: grid;
      grid-template-columns: 1.04fr .96fr;
      gap: 36px;
      align-items: center;
    }

    .hero-copy {
      max-width: 650px;
    }

    .hero-copy .lead {
      font-size: 18px;
      color: #40506a;
      margin-bottom: 26px;
    }

    .hero-actions {
      display: flex;
      flex-wrap: wrap;
      gap: 12px;
      margin-bottom: 28px;
    }

    .hero-points {
      display: grid;
      grid-template-columns: repeat(3, minmax(0, 1fr));
      gap: 12px;
      max-width: 650px;
    }

    .hero-point {
      background: rgba(255, 255, 255, .88);
      border: 1px solid var(--line);
      border-radius: var(--radius);
      padding: 14px;
      box-shadow: var(--shadow-soft);
    }

    .hero-point strong {
      display: block;
      color: var(--ink);
      font-size: 18px;
      margin-bottom: 2px;
    }

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

    .whitepaper-panel {
      background: rgba(255, 255, 255, .96);
      border: 1px solid var(--line);
      border-radius: 10px;
      box-shadow: var(--shadow);
      overflow: hidden;
    }

    .whitepaper-cover {
      display: grid;
      grid-template-columns: .92fr 1.08fr;
      min-height: 270px;
      background: linear-gradient(135deg, #f8fbff, #eaf3ff);
    }

    .cover-art {
      padding: 18px;
    }

    .cover-art img {
      width: 100%;
      height: 100%;
      min-height: 230px;
      object-fit: cover;
      border-radius: var(--radius);
      border: 1px solid rgba(255, 255, 255, .7);
    }

    .cover-summary {
      padding: 24px 24px 18px 4px;
    }

    .cover-summary ul {
      padding-left: 18px;
      margin: 14px 0 0;
      color: #40506a;
    }

    .cover-summary li {
      margin: 8px 0;
    }

    .lead-form {
      padding: 22px;
      border-top: 1px solid var(--line);
      background: #fff;
    }

    .lead-form .form-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 12px;
      margin-bottom: 12px;
    }

    .lead-form small {
      display: block;
      margin-top: 10px;
      color: var(--muted);
      font-size: 12px;
    }

    .slider-controls {
      position: absolute;
      z-index: 2;
      right: 34px;
      bottom: 32px;
      display: flex;
      align-items: center;
      gap: 10px;
    }

    .slider-btn,
    .slider-dot {
      width: 38px;
      height: 38px;
      border: 1px solid var(--line);
      border-radius: 8px;
      background: rgba(255, 255, 255, .92);
      color: var(--ink);
      display: grid;
      place-items: center;
      box-shadow: var(--shadow-soft);
    }

    .slider-dot {
      width: 12px;
      height: 12px;
      padding: 0;
      border-radius: 50%;
      box-shadow: none;
      background: #b9c7d8;
    }

    .slider-dot.active {
      background: var(--primary);
      border-color: var(--primary);
    }

    .news-layout {
      display: grid;
      grid-template-columns: minmax(0, 1.4fr) minmax(300px, .6fr);
      gap: 28px;
      align-items: start;
    }

    .feed-list,
    .rank-list,
    .updates-list {
      display: grid;
      gap: 14px;
    }

    .feed-item,
    .rank-item,
    .update-row,
    .resource-card,
    .feature-card,
    .adv-card,
    .product-card,
    .scenario-card,
    .security-item,
    .story-item {
      background: var(--surface);
      border: 1px solid var(--line);
      border-radius: var(--radius);
      box-shadow: var(--shadow-soft);
      transition: transform .2s ease, box-shadow .2s ease, border-color .2s ease;
    }

    .feed-item:hover,
    .rank-item:hover,
    .resource-card:hover,
    .feature-card:hover,
    .adv-card:hover,
    .product-card:hover,
    .scenario-card:hover,
    .security-item:hover,
    .story-item:hover {
      transform: translateY(-2px);
      box-shadow: var(--shadow);
      border-color: var(--line-strong);
    }

    .feed-item {
      display: grid;
      grid-template-columns: 210px minmax(0, 1fr);
      gap: 20px;
      padding: 16px;
    }

    .feed-item img {
      width: 100%;
      height: 142px;
      object-fit: cover;
      border-radius: var(--radius);
    }

    .meta {
      display: flex;
      flex-wrap: wrap;
      gap: 8px;
      margin-bottom: 10px;
      color: var(--muted);
      font-size: 13px;
    }

    .tag,
    .badge {
      display: inline-flex;
      align-items: center;
      border-radius: 999px;
      padding: 4px 9px;
      font-size: 12px;
      font-weight: 700;
      line-height: 1;
    }

    .tag {
      background: var(--primary-soft);
      color: var(--primary);
    }

    .badge {
      background: rgba(21, 168, 138, .12);
      color: #0d7d67;
    }

    .rank-box {
      position: sticky;
      top: 124px;
      display: grid;
      gap: 16px;
    }

    .rank-item {
      padding: 16px;
      display: grid;
      grid-template-columns: 38px 1fr;
      gap: 12px;
    }

    .rank-num {
      width: 34px;
      height: 34px;
      border-radius: 8px;
      background: #fff4dc;
      color: #b26500;
      display: grid;
      place-items: center;
      font-weight: 800;
    }

    .entry-panel {
      border-radius: var(--radius);
      border: 1px solid var(--line);
      background: linear-gradient(135deg, #ffffff, #eef7ff);
      padding: 20px;
      box-shadow: var(--shadow-soft);
    }

    .topic-strip {
      display: flex;
      flex-wrap: wrap;
      gap: 12px;
    }

    .topic-strip a {
      padding: 12px 16px;
      border-radius: 999px;
      background: #fff;
      border: 1px solid var(--line);
      color: #40506a;
      font-weight: 700;
      box-shadow: var(--shadow-soft);
    }

    .topic-strip a:hover {
      color: var(--primary);
      border-color: var(--primary);
      background: var(--primary-soft);
    }

    .updates-list {
      border: 1px solid var(--line);
      border-radius: var(--radius);
      overflow: hidden;
      background: #fff;
      box-shadow: var(--shadow-soft);
    }

    .update-row {
      box-shadow: none;
      border: 0;
      border-bottom: 1px solid var(--line);
      border-radius: 0;
      display: grid;
      grid-template-columns: 140px 1fr 150px;
      gap: 18px;
      padding: 18px 20px;
      align-items: center;
    }

    .update-row:last-child {
      border-bottom: 0;
    }

    .update-status {
      justify-self: end;
      color: var(--accent);
      font-weight: 800;
      font-size: 14px;
    }

    .media-grid,
    .feature-grid,
    .product-grid,
    .scenario-grid,
    .security-grid {
      display: grid;
      grid-template-columns: repeat(3, minmax(0, 1fr));
      gap: 20px;
    }

    .media-card {
      border: 1px solid var(--line);
      border-radius: var(--radius);
      padding: 22px;
      background: #fff;
      min-height: 170px;
      box-shadow: var(--shadow-soft);
    }

    .media-card strong {
      display: block;
      font-size: 18px;
      margin-bottom: 10px;
    }

    .subscribe-band {
      display: grid;
      grid-template-columns: 1fr 420px;
      gap: 28px;
      align-items: center;
      padding: 32px;
      border-radius: 10px;
      border: 1px solid var(--line);
      background: #fff;
      box-shadow: var(--shadow);
    }

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

    .mini-panel {
      border: 1px solid var(--line);
      border-radius: var(--radius);
      background: var(--light);
      padding: 18px;
    }

    .intro-layout {
      display: grid;
      grid-template-columns: .95fr 1.05fr;
      gap: 40px;
      align-items: center;
    }

    .intro-image {
      position: relative;
      border-radius: 10px;
      overflow: hidden;
      box-shadow: var(--shadow);
      border: 1px solid var(--line);
      aspect-ratio: 16 / 10;
    }

    .intro-image img {
      width: 100%;
      height: 100%;
      object-fit: cover;
    }

    .check-list {
      display: grid;
      gap: 12px;
      margin: 24px 0 0;
      padding: 0;
      list-style: none;
    }

    .check-list li {
      display: flex;
      gap: 10px;
      color: #40506a;
    }

    .check-list li::before {
      content: "✓";
      width: 22px;
      height: 22px;
      flex: 0 0 auto;
      border-radius: 50%;
      background: rgba(21, 168, 138, .14);
      color: var(--accent);
      display: grid;
      place-items: center;
      font-weight: 800;
      line-height: 1;
      margin-top: 2px;
    }

    .feature-card {
      padding: 22px;
      min-height: 210px;
    }

    .icon {
      width: 42px;
      height: 42px;
      border-radius: 8px;
      background: var(--primary-soft);
      color: var(--primary);
      display: grid;
      place-items: center;
      font-weight: 900;
      margin-bottom: 16px;
    }

    .adv-grid {
      display: grid;
      grid-template-columns: 1.05fr .95fr;
      gap: 20px;
    }

    .adv-main {
      min-height: 360px;
      padding: 30px;
      background: linear-gradient(135deg, #ffffff, #eef6ff);
      border: 1px solid var(--line);
      border-radius: var(--radius);
      box-shadow: var(--shadow);
    }

    .adv-main .big {
      font-size: 58px;
      line-height: 1;
      color: var(--primary);
      font-weight: 900;
      margin: 22px 0 12px;
    }

    .adv-side {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 20px;
    }

    .adv-card {
      padding: 20px;
    }

    .product-card {
      overflow: hidden;
      display: flex;
      flex-direction: column;
    }

    .product-card img {
      width: 100%;
      height: 185px;
      object-fit: cover;
    }

    .product-body {
      padding: 20px;
      display: flex;
      flex-direction: column;
      flex: 1;
    }

    .product-link {
      margin-top: auto;
      color: var(--primary);
      font-weight: 800;
    }

    .stats-band {
      display: grid;
      grid-template-columns: repeat(4, minmax(0, 1fr));
      gap: 16px;
      padding: 28px;
      border: 1px solid var(--line);
      border-radius: 10px;
      background: #fff;
      box-shadow: var(--shadow);
    }

    .stat-item strong {
      display: block;
      font-size: 34px;
      line-height: 1.1;
      color: var(--primary);
      margin-bottom: 8px;
    }

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

    .process {
      display: grid;
      grid-template-columns: repeat(6, minmax(0, 1fr));
      gap: 14px;
      counter-reset: step;
    }

    .process-step {
      position: relative;
      padding: 20px 16px;
      border: 1px solid var(--line);
      border-radius: var(--radius);
      background: #fff;
      box-shadow: var(--shadow-soft);
      counter-increment: step;
    }

    .process-step::before {
      content: counter(step, decimal-leading-zero);
      display: block;
      color: var(--primary);
      font-size: 24px;
      font-weight: 900;
      margin-bottom: 12px;
    }

    .dark-case {
      color: #fff;
      background: var(--dark);
      position: relative;
    }

    .dark-case::before {
      content: "";
      position: absolute;
      inset: 0;
      background-image: linear-gradient(90deg, rgba(255,255,255,.05) 1px, transparent 1px), linear-gradient(rgba(255,255,255,.05) 1px, transparent 1px);
      background-size: 46px 46px;
      opacity: .45;
    }

    .dark-case .container {
      position: relative;
      z-index: 1;
    }

    .dark-case p,
    .dark-case .section-head p {
      color: #c5d0df;
    }

    .case-layout {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 28px;
      align-items: center;
    }

    .case-panel {
      background: var(--dark-2);
      border: 1px solid rgba(255,255,255,.12);
      border-radius: 10px;
      padding: 26px;
    }

    .case-numbers {
      display: grid;
      grid-template-columns: repeat(2, minmax(0, 1fr));
      gap: 14px;
      margin-top: 18px;
    }

    .case-number {
      padding: 16px;
      border-radius: var(--radius);
      background: rgba(255,255,255,.08);
    }

    .case-number strong {
      display: block;
      font-size: 28px;
      color: #73d6c1;
      margin-bottom: 4px;
    }

    .case-image {
      border-radius: 10px;
      overflow: hidden;
      border: 1px solid rgba(255,255,255,.14);
      box-shadow: 0 20px 40px rgba(0,0,0,.24);
      aspect-ratio: 16 / 10;
    }

    .case-image img {
      width: 100%;
      height: 100%;
      object-fit: cover;
    }

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

    .story-item {
      display: grid;
      grid-template-columns: 180px 1fr;
      gap: 20px;
      padding: 20px;
    }

    .story-type {
      border-right: 1px solid var(--line);
      padding-right: 18px;
    }

    .scenario-card,
    .security-item {
      padding: 22px;
    }

    .quote-section {
      background: linear-gradient(180deg, #fff, #f6f9fd);
    }

    .quote-box {
      display: grid;
      grid-template-columns: 1fr 310px;
      gap: 30px;
      align-items: center;
      border: 1px solid var(--line);
      border-radius: 10px;
      background: #fff;
      box-shadow: var(--shadow);
      padding: 34px;
    }

    blockquote {
      margin: 0;
      font-size: 24px;
      line-height: 1.55;
      color: var(--ink);
      font-weight: 700;
    }

    .quote-profile {
      border-left: 1px solid var(--line);
      padding-left: 26px;
    }

    .stars {
      color: var(--warning);
      font-size: 20px;
      margin-bottom: 10px;
    }

    .contact-section {
      padding-bottom: 88px;
    }

    .contact-box {
      display: grid;
      grid-template-columns: 1fr 440px;
      gap: 28px;
      align-items: start;
      border: 1px solid var(--line);
      border-radius: 10px;
      padding: 34px;
      background: linear-gradient(135deg, #ffffff, #eef6ff);
      box-shadow: var(--shadow);
    }

    .contact-info {
      display: grid;
      grid-template-columns: repeat(2, minmax(0, 1fr));
      gap: 14px;
      margin-top: 24px;
    }

    .info-tile {
      padding: 16px;
      border: 1px solid var(--line);
      border-radius: var(--radius);
      background: rgba(255,255,255,.82);
    }

    .contact-form {
      display: grid;
      gap: 12px;
      padding: 20px;
      background: #fff;
      border: 1px solid var(--line);
      border-radius: var(--radius);
    }

    .site-footer {
      background: #101927;
      color: #d5deeb;
      padding: 54px 0 24px;
    }

    .footer-grid {
      display: grid;
      grid-template-columns: 1.2fr .8fr .8fr 1fr;
      gap: 32px;
      padding-bottom: 34px;
      border-bottom: 1px solid rgba(255,255,255,.12);
    }

    .footer-logo {
      display: inline-flex;
      align-items: center;
      gap: 10px;
      color: #fff;
      font-size: 20px;
      font-weight: 800;
      margin-bottom: 14px;
    }

    .footer-title {
      color: #fff;
      font-weight: 800;
      margin-bottom: 12px;
    }

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

    .footer-links a {
      color: #b8c4d4;
      font-size: 14px;
    }

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

    .footer-bottom {
      display: flex;
      flex-wrap: wrap;
      justify-content: space-between;
      gap: 12px;
      padding-top: 22px;
      color: #9facbd;
      font-size: 13px;
    }

    .mobile-drawer {
      display: none;
    }

    @media (max-width: 1080px) {
      .main-nav,
      .topbar {
        display: none;
      }

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

      .mobile-drawer {
        display: block;
        max-height: 0;
        overflow: hidden;
        border-top: 1px solid var(--line);
        background: #fff;
        transition: max-height .25s ease;
      }

      .mobile-drawer.open {
        max-height: 520px;
      }

      .mobile-drawer-inner {
        width: min(100% - 40px, var(--container));
        margin: 0 auto;
        padding: 14px 0 20px;
        display: grid;
        gap: 8px;
      }

      .mobile-drawer a,
      .mobile-drawer .mobile-info {
        padding: 12px 10px;
        border-radius: 8px;
        color: #334158;
        font-weight: 700;
      }

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

      .hero-content,
      .intro-layout,
      .subscribe-band,
      .contact-box,
      .case-layout,
      .quote-box {
        grid-template-columns: 1fr;
      }

      .rank-box {
        position: static;
      }

      .process {
        grid-template-columns: repeat(3, minmax(0, 1fr));
      }

      .media-grid,
      .feature-grid,
      .product-grid,
      .scenario-grid,
      .security-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
      }

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

      .quote-profile {
        border-left: 0;
        padding-left: 0;
        border-top: 1px solid var(--line);
        padding-top: 20px;
      }

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

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

      section {
        padding: 56px 0;
      }

      h1 {
        font-size: 32px;
      }

      h2 {
        font-size: 26px;
      }

      .hero {
        min-height: auto;
        padding: 46px 0 44px;
      }

      .hero-slide::after {
        background: rgba(255,255,255,.90);
      }

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

      .hero-points,
      .stats-band,
      .contact-info,
      .case-numbers {
        grid-template-columns: repeat(2, minmax(0, 1fr));
      }

      .whitepaper-cover,
      .news-layout,
      .feed-item,
      .update-row,
      .story-item {
        grid-template-columns: 1fr;
      }

      .cover-summary {
        padding: 0 20px 20px;
      }

      .lead-form .form-grid,
      .app-preview,
      .adv-side,
      .media-grid,
      .feature-grid,
      .product-grid,
      .scenario-grid,
      .security-grid,
      .process {
        grid-template-columns: 1fr;
      }

      .update-status {
        justify-self: start;
      }

      .story-type {
        border-right: 0;
        border-bottom: 1px solid var(--line);
        padding-right: 0;
        padding-bottom: 14px;
      }

      .slider-controls {
        right: 14px;
        bottom: 14px;
      }

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

    @media (max-width: 520px) {
      .nav-row {
        min-height: 64px;
      }

      .logo {
        font-size: 17px;
      }

      .logo-mark {
        width: 34px;
        height: 34px;
      }

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

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

      .btn,
      .topic-strip a {
        width: 100%;
      }

      .hero-points,
      .stats-band,
      .contact-info,
      .case-numbers {
        grid-template-columns: 1fr;
      }

      .contact-box,
      .quote-box,
      .subscribe-band {
        padding: 22px;
      }

      blockquote {
        font-size: 20px;
      }
    }

/* roulang page: category2 */
:root {
      --primary: #1769e0;
      --primary-dark: #0d4fb3;
      --primary-soft: #eaf3ff;
      --accent: #15a88a;
      --warning: #f59e0b;
      --ink: #152033;
      --muted: #66758a;
      --light: #f6f9fd;
      --surface: #ffffff;
      --line: #dfe7f1;
      --line-strong: #c9d7e8;
      --dark: #16202e;
      --dark-2: #233145;
      --shadow: 0 14px 34px rgba(24, 55, 90, .10);
      --shadow-soft: 0 8px 24px rgba(24, 55, 90, .08);
      --radius: 8px;
      --container: 1240px;
      --nav-height: 72px;
    }
    * { box-sizing: border-box; }
    html { scroll-behavior: smooth; }
    body {
      margin: 0;
      font-family: "Noto Sans SC", "PingFang SC", "Microsoft YaHei", Arial, sans-serif;
      color: var(--ink);
      background: #fff;
      line-height: 1.72;
      font-size: 16px;
    }
    a {
      color: inherit;
      text-decoration: none;
      transition: color .2s ease, background .2s ease, border-color .2s ease, box-shadow .2s ease;
    }
    img { max-width: 100%; display: block; }
    button, input, textarea { font: inherit; }
    button { cursor: pointer; border: 0; background: transparent; }
    input, textarea {
      width: 100%;
      border: 1px solid var(--line);
      border-radius: var(--radius);
      background: #fff;
      color: var(--ink);
      padding: 12px 14px;
      outline: none;
      transition: border-color .2s ease, box-shadow .2s ease;
    }
    input:focus, textarea:focus, a:focus-visible, button:focus-visible {
      outline: 3px solid rgba(23, 105, 224, .22);
      outline-offset: 2px;
    }
    input:focus, textarea:focus {
      border-color: var(--primary);
      box-shadow: 0 0 0 4px rgba(23, 105, 224, .10);
    }
    .container {
      width: min(100% - 40px, var(--container));
      margin: 0 auto;
    }
    .site-header {
      position: sticky;
      top: 0;
      z-index: 50;
      background: rgba(255, 255, 255, .96);
      backdrop-filter: blur(16px);
      border-bottom: 1px solid rgba(223, 231, 241, .85);
      box-shadow: 0 8px 24px rgba(24, 55, 90, .04);
    }
    .topbar {
      border-bottom: 1px solid var(--line);
      background: #f8fbff;
      color: var(--muted);
      font-size: 13px;
    }
    .topbar-inner {
      min-height: 38px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 18px;
    }
    .topbar-group {
      display: flex;
      flex-wrap: wrap;
      align-items: center;
      gap: 18px;
    }
    .topbar strong { color: var(--ink); font-weight: 600; }
    .nav-row {
      min-height: var(--nav-height);
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 28px;
    }
    .logo {
      display: inline-flex;
      align-items: center;
      gap: 10px;
      font-size: 20px;
      font-weight: 800;
      color: var(--ink);
      white-space: nowrap;
    }
    .logo-mark {
      width: 38px;
      height: 38px;
      border-radius: 8px;
      background: linear-gradient(135deg, var(--primary), #26b7d3);
      color: #fff;
      display: grid;
      place-items: center;
      font-size: 18px;
      box-shadow: 0 10px 22px rgba(23, 105, 224, .24);
      flex: 0 0 auto;
    }
    .main-nav {
      display: flex;
      align-items: center;
      gap: 4px;
      margin-left: auto;
    }
    .main-nav a {
      padding: 11px 13px;
      border-radius: 7px;
      color: #334158;
      font-size: 15px;
      font-weight: 600;
      white-space: nowrap;
    }
    .main-nav a:hover, .main-nav a.active {
      color: var(--primary);
      background: var(--primary-soft);
    }
    .nav-actions { display: flex; align-items: center; gap: 10px; }
    .menu-toggle {
      display: none;
      width: 44px;
      height: 44px;
      border: 1px solid var(--line);
      border-radius: 8px;
      color: var(--ink);
      background: #fff;
      align-items: center;
      justify-content: center;
      flex-direction: column;
      gap: 5px;
    }
    .menu-toggle span {
      width: 20px;
      height: 2px;
      background: currentColor;
      border-radius: 2px;
      transition: transform .2s ease, opacity .2s ease;
    }
    .menu-open .menu-toggle span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
    .menu-open .menu-toggle span:nth-child(2) { opacity: 0; }
    .menu-open .menu-toggle span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }
    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      min-height: 44px;
      padding: 11px 18px;
      border-radius: 8px;
      border: 1px solid transparent;
      font-weight: 700;
      line-height: 1.2;
      gap: 8px;
      white-space: nowrap;
      transition: transform .2s ease, background .2s ease, border-color .2s ease, box-shadow .2s ease, color .2s ease;
    }
    .btn:hover { transform: translateY(-1px); }
    .btn-primary {
      color: #fff;
      background: var(--primary);
      box-shadow: 0 10px 22px rgba(23, 105, 224, .22);
    }
    .btn-primary:hover {
      background: var(--primary-dark);
      box-shadow: 0 14px 28px rgba(23, 105, 224, .28);
    }
    .btn-secondary {
      color: var(--primary);
      background: #fff;
      border-color: var(--line-strong);
    }
    .btn-secondary:hover {
      border-color: var(--primary);
      background: var(--primary-soft);
    }
    .btn-ghost {
      color: var(--ink);
      background: #fff;
      border-color: var(--line);
    }
    .btn-ghost:hover {
      color: var(--primary);
      border-color: var(--primary);
      box-shadow: var(--shadow-soft);
    }
    main { overflow: hidden; }
    section { padding: 76px 0; }
    .section-muted { background: var(--light); }
    .section-head { max-width: 820px; margin-bottom: 34px; }
    .section-head.center { margin-left: auto; margin-right: auto; text-align: center; }
    .eyebrow {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      min-height: 28px;
      padding: 4px 10px;
      border-radius: 999px;
      background: var(--primary-soft);
      color: var(--primary);
      font-size: 13px;
      font-weight: 700;
      margin-bottom: 14px;
    }
    .eyebrow::before {
      content: "";
      width: 7px;
      height: 7px;
      border-radius: 50%;
      background: var(--accent);
    }
    h1, h2, h3, p { margin-top: 0; }
    h1 {
      margin-bottom: 22px;
      font-size: 48px;
      line-height: 1.16;
      letter-spacing: 0;
      color: var(--ink);
    }
    h2 {
      margin-bottom: 14px;
      font-size: 34px;
      line-height: 1.28;
      letter-spacing: 0;
    }
    h3 {
      margin-bottom: 10px;
      font-size: 20px;
      line-height: 1.35;
      letter-spacing: 0;
    }
    p { color: var(--muted); }
    .hero-inner {
      display: grid;
      grid-template-columns: 1.03fr .97fr;
      gap: 58px;
      align-items: center;
    }
    .category-hero {
      position: relative;
      padding: 70px 0 64px;
      background:
        linear-gradient(90deg, rgba(246,249,253,.98) 0%, rgba(246,249,253,.92) 48%, rgba(246,249,253,.62) 100%),
        url('/assets/images/c68096883080ea6a.webp') center/cover no-repeat;
    }
    .hero-copy { max-width: 680px; }
    .hero-copy p {
      margin-bottom: 24px;
      font-size: 18px;
      color: #4a5b72;
    }
    .hero-actions {
      display: flex;
      flex-wrap: wrap;
      gap: 12px;
      margin: 26px 0 24px;
    }
    .check-strip {
      display: flex;
      flex-wrap: wrap;
      gap: 10px;
      margin-top: 28px;
    }
    .check-strip span {
      display: inline-flex;
      align-items: center;
      gap: 7px;
      min-height: 36px;
      padding: 7px 11px;
      border: 1px solid var(--line);
      border-radius: 999px;
      background: rgba(255,255,255,.78);
      color: #314159;
      font-size: 14px;
      font-weight: 700;
      box-shadow: 0 8px 20px rgba(24,55,90,.05);
    }
    .check-strip span::before {
      content: "✓";
      width: 18px;
      height: 18px;
      display: grid;
      place-items: center;
      border-radius: 50%;
      color: #fff;
      background: var(--accent);
      font-size: 12px;
      line-height: 1;
    }
    .hero-panel {
      background: rgba(255,255,255,.92);
      border: 1px solid rgba(223,231,241,.92);
      border-radius: var(--radius);
      box-shadow: var(--shadow);
      overflow: hidden;
    }
    .hero-panel img {
      width: 100%;
      aspect-ratio: 4 / 2.45;
      object-fit: cover;
    }
    .panel-body { padding: 24px; }
    .mini-grid {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 12px;
      margin-top: 18px;
    }
    .mini-stat {
      padding: 14px;
      border: 1px solid var(--line);
      border-radius: var(--radius);
      background: #fbfdff;
    }
    .mini-stat strong {
      display: block;
      color: var(--primary);
      font-size: 24px;
      line-height: 1.1;
    }
    .mini-stat span {
      display: block;
      margin-top: 4px;
      color: var(--muted);
      font-size: 13px;
    }
    .matrix-grid {
      display: grid;
      grid-template-columns: 1.05fr .95fr;
      gap: 24px;
      align-items: stretch;
    }
    .feature-list {
      display: grid;
      gap: 14px;
    }
    .feature-item, .card, .case-card, .faq-item {
      border: 1px solid var(--line);
      border-radius: var(--radius);
      background: #fff;
      box-shadow: var(--shadow-soft);
      transition: transform .2s ease, box-shadow .2s ease, border-color .2s ease;
    }
    .feature-item:hover, .card:hover, .case-card:hover, .faq-item:hover {
      transform: translateY(-2px);
      border-color: var(--line-strong);
      box-shadow: var(--shadow);
    }
    .feature-item {
      display: grid;
      grid-template-columns: 58px 1fr;
      gap: 16px;
      padding: 20px;
    }
    .icon {
      width: 46px;
      height: 46px;
      border-radius: 8px;
      display: grid;
      place-items: center;
      background: var(--primary-soft);
      color: var(--primary);
      font-weight: 900;
      font-size: 20px;
    }
    .feature-item p, .card p, .case-card p { margin-bottom: 0; }
    .side-card {
      padding: 28px;
      background: linear-gradient(180deg, #ffffff, #f7fbff);
      border: 1px solid var(--line);
      border-radius: var(--radius);
      box-shadow: var(--shadow);
    }
    .side-card img {
      width: 100%;
      aspect-ratio: 16 / 10;
      object-fit: cover;
      border-radius: var(--radius);
      margin-bottom: 22px;
    }
    .tag-row {
      display: flex;
      flex-wrap: wrap;
      gap: 8px;
      margin-top: 18px;
    }
    .tag {
      display: inline-flex;
      align-items: center;
      min-height: 30px;
      padding: 5px 10px;
      border-radius: 999px;
      color: #34506f;
      background: #eef5ff;
      border: 1px solid #dcecff;
      font-size: 13px;
      font-weight: 700;
    }
    .stats-band {
      padding: 34px;
      border: 1px solid var(--line);
      border-radius: var(--radius);
      background: #fff;
      box-shadow: var(--shadow);
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 18px;
    }
    .stat-cell {
      padding: 8px 18px;
      border-left: 3px solid var(--primary);
    }
    .stat-cell strong {
      display: block;
      color: var(--ink);
      font-size: 32px;
      line-height: 1.15;
    }
    .stat-cell span {
      display: block;
      margin-top: 6px;
      color: var(--muted);
      font-size: 14px;
    }
    .process-wrap {
      display: grid;
      grid-template-columns: .75fr 1.25fr;
      gap: 30px;
      align-items: start;
    }
    .steps {
      counter-reset: step;
      display: grid;
      gap: 14px;
    }
    .step {
      counter-increment: step;
      display: grid;
      grid-template-columns: 54px 1fr;
      gap: 16px;
      padding: 18px;
      border: 1px solid var(--line);
      border-radius: var(--radius);
      background: #fff;
      box-shadow: var(--shadow-soft);
    }
    .step::before {
      content: counter(step, decimal-leading-zero);
      width: 44px;
      height: 44px;
      border-radius: 8px;
      display: grid;
      place-items: center;
      background: var(--primary);
      color: #fff;
      font-weight: 800;
    }
    .dark-section {
      background: var(--dark);
      color: #fff;
    }
    .dark-section h2, .dark-section h3 { color: #fff; }
    .dark-section p { color: #c9d6e8; }
    .case-layout {
      display: grid;
      grid-template-columns: .9fr 1.1fr;
      gap: 24px;
      align-items: stretch;
    }
    .case-media img {
      width: 100%;
      height: 100%;
      min-height: 410px;
      object-fit: cover;
      border-radius: var(--radius);
    }
    .case-stack {
      display: grid;
      gap: 16px;
    }
    .case-card {
      padding: 22px;
      background: rgba(255,255,255,.06);
      border-color: rgba(255,255,255,.14);
      box-shadow: none;
    }
    .case-card .tag {
      background: rgba(21,168,138,.14);
      color: #9ff2de;
      border-color: rgba(21,168,138,.28);
    }
    .news-grid, .partner-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 22px;
    }
    .card { overflow: hidden; }
    .card img {
      width: 100%;
      aspect-ratio: 16 / 10;
      object-fit: cover;
    }
    .card-body { padding: 22px; }
    .card-meta {
      display: flex;
      flex-wrap: wrap;
      gap: 8px;
      margin-bottom: 12px;
      color: var(--primary);
      font-size: 13px;
      font-weight: 700;
    }
    .partner-card {
      padding: 22px;
      border: 1px solid var(--line);
      border-radius: var(--radius);
      background: #fff;
      min-height: 158px;
      box-shadow: var(--shadow-soft);
    }
    .partner-card strong {
      display: block;
      margin-bottom: 8px;
      color: var(--ink);
      font-size: 18px;
    }
    .partner-card p { margin-bottom: 0; font-size: 14px; }
    .faq-list {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 18px;
    }
    .faq-item { padding: 22px; }
    .faq-item h3 {
      display: flex;
      align-items: flex-start;
      gap: 10px;
      font-size: 18px;
    }
    .faq-item h3::before {
      content: "Q";
      width: 26px;
      height: 26px;
      border-radius: 6px;
      display: grid;
      place-items: center;
      background: var(--primary-soft);
      color: var(--primary);
      font-size: 13px;
      font-weight: 900;
      flex: 0 0 auto;
    }
    .assurance {
      padding: 34px;
      border-radius: var(--radius);
      background: linear-gradient(135deg, #ffffff, #eef6ff);
      border: 1px solid var(--line);
      box-shadow: var(--shadow);
      display: grid;
      grid-template-columns: 1fr auto;
      gap: 24px;
      align-items: center;
    }
    .assurance-list {
      display: flex;
      flex-wrap: wrap;
      gap: 10px;
      margin-top: 14px;
    }
    .contact-layout {
      display: grid;
      grid-template-columns: .9fr 1.1fr;
      gap: 28px;
      align-items: start;
    }
    .contact-card, .form-card {
      border: 1px solid var(--line);
      border-radius: var(--radius);
      background: #fff;
      box-shadow: var(--shadow);
      padding: 28px;
    }
    .contact-lines {
      display: grid;
      gap: 12px;
      margin-top: 18px;
      color: var(--muted);
    }
    .contact-lines strong { color: var(--ink); }
    .form-grid {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 14px;
    }
    .form-grid .full { grid-column: 1 / -1; }
    textarea { min-height: 112px; resize: vertical; }
    .form-note {
      margin: 12px 0 0;
      font-size: 13px;
      color: var(--muted);
    }
    .site-footer {
      padding: 58px 0 26px;
      background: #101826;
      color: #d6e0ee;
    }
    .footer-grid {
      display: grid;
      grid-template-columns: 1.25fr .85fr .85fr 1.15fr;
      gap: 34px;
    }
    .footer-logo {
      display: inline-flex;
      align-items: center;
      gap: 10px;
      margin-bottom: 14px;
      font-size: 20px;
      font-weight: 800;
      color: #fff;
    }
    .site-footer p {
      margin: 0;
      color: #aab8ca;
      font-size: 14px;
    }
    .footer-title {
      margin-bottom: 13px;
      color: #fff;
      font-weight: 800;
    }
    .footer-links {
      display: grid;
      gap: 9px;
      color: #aab8ca;
      font-size: 14px;
    }
    .footer-links a:hover { color: #fff; }
    .footer-bottom {
      display: flex;
      justify-content: space-between;
      gap: 18px;
      margin-top: 38px;
      padding-top: 20px;
      border-top: 1px solid rgba(255,255,255,.12);
      color: #91a2b8;
      font-size: 13px;
    }
    @media (max-width: 1120px) {
      .main-nav a { padding: 10px 9px; font-size: 14px; }
      .nav-row { gap: 14px; }
      h1 { font-size: 42px; }
    }
    @media (max-width: 960px) {
      .topbar { display: none; }
      .menu-toggle { display: inline-flex; }
      .main-nav {
        position: fixed;
        left: 20px;
        right: 20px;
        top: 78px;
        display: none;
        flex-direction: column;
        align-items: stretch;
        gap: 6px;
        padding: 16px;
        background: #fff;
        border: 1px solid var(--line);
        border-radius: var(--radius);
        box-shadow: var(--shadow);
        margin: 0;
      }
      .menu-open .main-nav { display: flex; }
      .main-nav a { padding: 13px 14px; }
      .nav-actions .btn { display: none; }
      .hero-inner, .matrix-grid, .process-wrap, .case-layout, .contact-layout {
        grid-template-columns: 1fr;
      }
      .stats-band, .news-grid, .partner-grid, .faq-list, .footer-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .case-media img { min-height: 280px; }
    }
    @media (max-width: 640px) {
      .container { width: min(100% - 28px, var(--container)); }
      section { padding: 54px 0; }
      .category-hero { padding: 52px 0 48px; }
      h1 { font-size: 30px; }
      h2 { font-size: 25px; }
      .hero-copy p { font-size: 16px; }
      .hero-actions { flex-direction: column; }
      .btn { width: 100%; min-height: 46px; }
      .mini-grid, .stats-band, .news-grid, .partner-grid, .faq-list, .form-grid, .footer-grid {
        grid-template-columns: 1fr;
      }
      .feature-item, .step { grid-template-columns: 1fr; }
      .assurance {
        grid-template-columns: 1fr;
        padding: 24px;
      }
      .footer-bottom {
        flex-direction: column;
      }
      .logo { font-size: 18px; }
      .panel-body, .contact-card, .form-card { padding: 22px; }
    }

/* roulang page: category1 */
:root{
 --primary:#1769e0;
 --primary-dark:#0d4fb3;
 --primary-soft:#eaf3ff;
 --accent:#15a88a;
 --warning:#f59e0b;
 --ink:#152033;
 --muted:#66758a;
 --light:#f6f9fd;
 --surface:#fff;
 --line:#dfe7f1;
 --line-strong:#c9d7e8;
 --dark:#16202e;
 --dark-2:#233145;
 --shadow:0 14px 34px rgba(24,55,90,.10);
 --shadow-soft:0 8px 24px rgba(24,55,90,.08);
 --radius:8px;
 --container:1240px;
 --nav-height:72px;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
 margin:0;
 color:var(--ink);
 background:#fff;
 font-family:"Noto Sans SC","PingFang SC","Microsoft YaHei",Arial,sans-serif;
 font-size:16px;
 line-height:1.72;
}
a{color:inherit;text-decoration:none;transition:color .2s ease,background .2s ease,border-color .2s ease,box-shadow .2s ease}
img{display:block;max-width:100%}
button,input,textarea{font:inherit}
button{border:0;background:transparent;cursor:pointer}
input,textarea{
 width:100%;padding:12px 14px;border:1px solid var(--line);border-radius:var(--radius);
 background:#fff;color:var(--ink);outline:none;transition:border-color .2s ease,box-shadow .2s ease
}
input:focus,textarea:focus{border-color:var(--primary);box-shadow:0 0 0 4px rgba(23,105,224,.10)}
a:focus-visible,button:focus-visible,input:focus-visible,textarea:focus-visible{outline:3px solid rgba(23,105,224,.25);outline-offset:2px}
.container{width:min(calc(100% - 40px),var(--container));margin:0 auto}
.site-header{
 position:sticky;top:0;z-index:50;background:rgba(255,255,255,.96);
 backdrop-filter:blur(16px);border-bottom:1px solid rgba(223,231,241,.85);
 box-shadow:0 8px 24px rgba(24,55,90,.04)
}
.topbar{background:#f8fbff;border-bottom:1px solid var(--line);color:var(--muted);font-size:13px}
.topbar-inner{min-height:38px;display:flex;align-items:center;justify-content:space-between;gap:18px}
.topbar-group{display:flex;flex-wrap:wrap;align-items:center;gap:18px}
.topbar strong{color:var(--ink);font-weight:600}
.nav-row{min-height:var(--nav-height);display:flex;align-items:center;justify-content:space-between;gap:24px}
.logo{display:inline-flex;align-items:center;gap:10px;font-size:20px;font-weight:800;white-space:nowrap}
.logo-mark{
 width:38px;height:38px;border-radius:8px;background:linear-gradient(135deg,var(--primary),#26b7d3);
 color:#fff;display:grid;place-items:center;font-size:18px;box-shadow:0 10px 22px rgba(23,105,224,.24)
}
.main-nav{display:flex;align-items:center;gap:4px;margin-left:auto}
.main-nav a{padding:11px 13px;border-radius:7px;color:#334158;font-size:15px;font-weight:600;white-space:nowrap}
.main-nav a:hover,.main-nav a.active{color:var(--primary);background:var(--primary-soft)}
.nav-actions{display:flex;align-items:center;gap:10px}
.menu-toggle{
 display:none;width:44px;height:44px;border:1px solid var(--line);border-radius:8px;
 color:var(--ink);background:#fff;align-items:center;justify-content:center;flex-direction:column;gap:5px
}
.menu-toggle span{width:20px;height:2px;background:currentColor;border-radius:2px;transition:transform .2s ease,opacity .2s ease}
.btn{
 display:inline-flex;align-items:center;justify-content:center;min-height:44px;padding:11px 18px;
 border-radius:8px;border:1px solid transparent;font-weight:700;line-height:1.2;gap:8px;white-space:nowrap;
 transition:transform .2s ease,background .2s ease,border-color .2s ease,box-shadow .2s ease,color .2s ease
}
.btn:hover{transform:translateY(-1px)}
.btn-primary{color:#fff;background:var(--primary);box-shadow:0 10px 22px rgba(23,105,224,.22)}
.btn-primary:hover{background:var(--primary-dark);box-shadow:0 14px 28px rgba(23,105,224,.28)}
.btn-secondary{color:var(--primary);background:#fff;border-color:var(--line-strong)}
.btn-secondary:hover{border-color:var(--primary);background:var(--primary-soft)}
main{overflow:hidden}
section{padding:78px 0}
.section-muted{background:var(--light)}
.section-head{max-width:820px;margin-bottom:34px}
.section-head.center{margin-left:auto;margin-right:auto;text-align:center}
.eyebrow{
 display:inline-flex;align-items:center;gap:8px;min-height:28px;padding:4px 10px;border-radius:999px;
 background:var(--primary-soft);color:var(--primary);font-size:13px;font-weight:700;margin-bottom:14px
}
.eyebrow:before{content:"";width:7px;height:7px;border-radius:50%;background:var(--accent)}
h1,h2,h3,p{margin-top:0}
h1,h2,h3{line-height:1.25;letter-spacing:0}
h1{font-size:clamp(38px,4vw,62px);margin-bottom:20px}
h2{font-size:clamp(28px,3vw,40px);margin-bottom:14px}
h3{font-size:20px;margin-bottom:10px}
.section-head p{color:var(--muted);margin-bottom:0}
.page-hero{
 position:relative;min-height:480px;display:flex;align-items:center;
 background:url("/assets/images/c68096883080ea6a.webp") center/cover no-repeat
}
.page-hero:before{content:"";position:absolute;inset:0;background:linear-gradient(90deg,rgba(11,28,52,.86),rgba(11,28,52,.56) 54%,rgba(11,28,52,.16))}
.page-hero .container{position:relative;z-index:1}
.hero-copy{max-width:720px;color:#fff;padding:50px 0}
.hero-copy .eyebrow{background:rgba(255,255,255,.14);color:#fff}
.hero-copy .eyebrow:before{background:#5ee1bf}
.hero-copy p{max-width:650px;color:rgba(255,255,255,.86);font-size:18px}
.hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:30px}
.hero-actions .btn-secondary{background:rgba(255,255,255,.08);border-color:rgba(255,255,255,.5);color:#fff}
.hero-actions .btn-secondary:hover{background:#fff;color:var(--primary)}
.breadcrumb{display:flex;gap:10px;align-items:center;color:rgba(255,255,255,.72);font-size:13px;margin-bottom:26px}
.breadcrumb a:hover{color:#fff}
.intro-grid{display:grid;grid-template-columns:minmax(0,1.05fr) minmax(420px,.95fr);gap:72px;align-items:center}
.intro-copy p{color:var(--muted)}
.check-list{list-style:none;padding:0;margin:24px 0 0;display:grid;gap:12px}
.check-list li{display:flex;gap:12px;align-items:flex-start}
.check-list li:before{content:"✓";width:22px;height:22px;flex:0 0 22px;border-radius:50%;display:grid;place-items:center;background:#dff7f0;color:var(--accent);font-size:13px;font-weight:800;margin-top:3px}
.image-frame{border-radius:var(--radius);overflow:hidden;box-shadow:var(--shadow);border:1px solid var(--line);background:#fff}
.image-frame img{width:100%;aspect-ratio:1.24/1;object-fit:cover}
.spec-strip{display:grid;grid-template-columns:repeat(3,1fr);border-top:1px solid var(--line);margin-top:28px;padding-top:22px;gap:18px}
.spec strong{display:block;font-size:24px;color:var(--primary);line-height:1.2}
.spec span{display:block;color:var(--muted);font-size:13px;margin-top:4px}
.matrix{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
.matrix-item,.advantage,.product-card,.article-card,.faq-item{
 border:1px solid var(--line);border-radius:var(--radius);background:var(--surface);box-shadow:var(--shadow-soft)
}
.matrix-item{padding:26px;min-height:198px;transition:transform .2s ease,box-shadow .2s ease,border-color .2s ease}
.matrix-item:hover,.advantage:hover,.product-card:hover,.article-card:hover{transform:translateY(-3px);box-shadow:var(--shadow);border-color:#b8d0ee}
.icon-box{width:42px;height:42px;display:grid;place-items:center;border-radius:8px;background:var(--primary-soft);color:var(--primary);font-size:20px;font-weight:800;margin-bottom:18px}
.matrix-item:nth-child(2) .icon-box,.matrix-item:nth-child(5) .icon-box{background:#e4f8f3;color:var(--accent)}
.matrix-item:nth-child(3) .icon-box,.matrix-item:nth-child(6) .icon-box{background:#fff3dc;color:#c47a00}
.matrix-item p,.advantage p,.product-card p,.article-card p{color:var(--muted);font-size:14px;margin-bottom:0}
.item-tag{display:inline-block;margin-top:15px;color:var(--primary);font-size:12px;font-weight:700}
.advantage-layout{display:grid;grid-template-columns:.82fr 1.18fr;gap:50px;align-items:start}
.advantage-lead{padding-right:35px}
.advantage-lead p{color:var(--muted)}
.advantage-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:16px}
.advantage{padding:22px;min-height:158px}
.advantage-number{font-size:13px;color:var(--primary);font-weight:800;margin-bottom:18px}
.advantage h3{font-size:18px}
.product-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.product-card{overflow:hidden;transition:transform .2s ease,box-shadow .2s ease,border-color .2s ease}
.product-card img{width:100%;aspect-ratio:1.65/1;object-fit:cover}
.product-body{padding:23px}
.product-meta{font-size:12px;color:var(--accent);font-weight:700;margin-bottom:9px}
.text-link{display:inline-flex;align-items:center;gap:6px;color:var(--primary);font-size:14px;font-weight:700;margin-top:18px}
.text-link:hover{color:var(--primary-dark);gap:9px}
.process{display:grid;grid-template-columns:repeat(6,1fr);gap:0;position:relative}
.process:before{content:"";height:1px;background:var(--line-strong);position:absolute;top:19px;left:7%;right:7%}
.process-step{position:relative;z-index:1;padding:0 12px;text-align:center}
.step-number{width:40px;height:40px;margin:0 auto 17px;border-radius:50%;display:grid;place-items:center;background:#fff;border:2px solid var(--primary);color:var(--primary);font-weight:800}
.process-step h3{font-size:16px}
.process-step p{font-size:13px;color:var(--muted);margin:0}
.dark-section{background:var(--dark);color:#fff}
.dark-section .eyebrow{background:rgba(255,255,255,.11);color:#b8d8ff}
.dark-section .section-head p{color:#aebbc9}
.case-layout{display:grid;grid-template-columns:.9fr 1.1fr;gap:70px;align-items:center}
.case-number{font-size:76px;line-height:1;color:#65cdb7;font-weight:800;margin-bottom:18px}
.case-copy p{color:#c1ccd8}
.case-points{display:grid;grid-template-columns:repeat(2,1fr);gap:14px;margin-top:26px}
.case-point{padding:16px 18px;border:1px solid rgba(255,255,255,.14);border-radius:7px;background:rgba(255,255,255,.04)}
.case-point strong{display:block;font-size:23px;color:#fff}
.case-point span{font-size:13px;color:#aebbc9}
.case-image{border-radius:8px;overflow:hidden}
.case-image img{width:100%;aspect-ratio:1.38/1;object-fit:cover}
.story-grid{display:grid;grid-template-columns:1fr 1fr;gap:20px}
.story{padding:28px;border-left:4px solid var(--primary);background:#fff;box-shadow:var(--shadow-soft);border-radius:0 8px 8px 0}
.story:nth-child(2){border-left-color:var(--accent)}
.story-label{color:var(--primary);font-size:13px;font-weight:800;margin-bottom:12px}
.story p{color:var(--muted);margin-bottom:0}
.stats-band{padding:42px 0;background:#edf6ff;border-top:1px solid #d6e8fb;border-bottom:1px solid #d6e8fb}
.stats-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.stat{padding:4px 24px;border-left:1px solid #c8dff5}
.stat:first-child{border-left:0}
.stat strong{display:block;color:var(--primary);font-size:34px;line-height:1.15}
.stat span{display:block;color:var(--muted);font-size:14px;margin-top:5px}
.quote-layout{display:grid;grid-template-columns:1.25fr .75fr;gap:50px;align-items:center}
.quote-mark{font-size:72px;color:#bdd9fb;line-height:.8;font-family:Georgia,serif}
.quote-text{font-size:25px;line-height:1.6;margin:14px 0 22px}
.quote-author{font-size:14px;color:var(--muted)}
.scene-grid{display:grid;grid-template-columns:1.15fr .85fr;gap:18px}
.scene-main,.scene-side{position:relative;overflow:hidden;border-radius:var(--radius);min-height:280px}
.scene-main img,.scene-side img{width:100%;height:100%;object-fit:cover}
.scene-main:after,.scene-side:after{content:"";position:absolute;inset:40% 0 0;background:linear-gradient(transparent,rgba(10,25,45,.82))}
.scene-content{position:absolute;z-index:1;bottom:25px;left:28px;right:28px;color:#fff}
.scene-content h3{margin-bottom:5px}
.scene-content p{font-size:14px;color:rgba(255,255,255,.84);margin:0}
.scene-side-wrap{display:grid;grid-template-rows:1fr 1fr;gap:18px}
.scene-side{min-height:131px}
.scene-side .scene-content{bottom:18px;left:20px;right:20px}
.scene-side .scene-content h3{font-size:18px}
.article-layout{display:grid;grid-template-columns:1fr 330px;gap:46px;align-items:start}
.article-list{display:grid;gap:13px}
.article-card{display:grid;grid-template-columns:180px 1fr;gap:20px;overflow:hidden;transition:transform .2s ease,box-shadow .2s ease,border-color .2s ease}
.article-card img{width:180px;height:132px;object-fit:cover}
.article-card-body{padding:18px 18px 18px 0}
.article-card h3{font-size:18px;margin-bottom:7px}
.article-date{color:var(--accent);font-size:12px;font-weight:700}
.article-more{padding:26px;background:#f0f6ff;border:1px solid #d4e5fa;border-radius:var(--radius)}
.article-more h3{font-size:19px}
.article-more p{color:var(--muted);font-size:14px}
.faq-list{display:grid;gap:12px;max-width:920px;margin:0 auto}
.faq-item{overflow:hidden;box-shadow:none}
.faq-question{width:100%;display:flex;align-items:center;justify-content:space-between;text-align:left;padding:20px 22px;color:var(--ink);font-weight:700;background:#fff}
.faq-question span:last-child{color:var(--primary);font-size:23px;line-height:1;transition:transform .2s ease}
.faq-answer{display:none;padding:0 22px 20px;color:var(--muted);font-size:14px}
.faq-item.open .faq-answer{display:block}
.faq-item.open .faq-question span:last-child{transform:rotate(45deg)}
.cta-section{padding:66px 0;background:var(--primary)}
.cta-layout{display:flex;align-items:center;justify-content:space-between;gap:30px;color:#fff}
.cta-layout h2{margin-bottom:8px}
.cta-layout p{margin:0;color:rgba(255,255,255,.82)}
.cta-layout .btn-secondary{border-color:#fff}
.site-footer{background:var(--dark);color:#c0ccda;padding:56px 0 20px}
.footer-grid{display:grid;grid-template-columns:1.25fr 1fr 1fr 1.25fr;gap:38px}
.footer-logo{display:inline-flex;align-items:center;gap:10px;color:#fff;font-size:19px;font-weight:800}
.footer-logo .logo-mark{width:34px;height:34px;font-size:16px;box-shadow:none}
.site-footer p{font-size:14px;line-height:1.8;margin:18px 0 0;color:#9eacbc}
.footer-title{color:#fff;font-size:15px;font-weight:700;margin-bottom:16px}
.footer-links{display:grid;gap:9px;font-size:13px}
.footer-links a:hover{color:#fff}
.footer-bottom{display:flex;justify-content:space-between;gap:20px;border-top:1px solid rgba(255,255,255,.12);margin-top:42px;padding-top:18px;color:#8d9aaa;font-size:12px}
.footer-bottom a:hover{color:#fff}
@media(max-width:1100px){
 .main-nav a{padding-left:8px;padding-right:8px;font-size:14px}
 .intro-grid,.case-layout{gap:38px}
 .footer-grid{grid-template-columns:repeat(2,1fr)}
}
@media(max-width:820px){
 .topbar-group:last-child{display:none}
 .main-nav{display:none;position:absolute;top:calc(100% + 1px);left:0;right:0;margin:0;padding:12px 20px 18px;background:#fff;border-bottom:1px solid var(--line);box-shadow:var(--shadow);flex-direction:column;align-items:stretch}
 .main-nav a{display:block;padding:13px 14px}
 .site-header.menu-open .main-nav{display:flex}
 .menu-toggle{display:flex}
 .nav-actions .btn{display:none}
 .intro-grid,.advantage-layout,.case-layout,.quote-layout,.article-layout,.scene-grid{grid-template-columns:1fr}
 .intro-grid{gap:30px}
 .matrix{grid-template-columns:repeat(2,1fr)}
 .product-grid{grid-template-columns:repeat(2,1fr)}
 .process{grid-template-columns:repeat(3,1fr);row-gap:30px}
 .process:before{display:none}
 .stats-grid{grid-template-columns:repeat(2,1fr);row-gap:24px}
 .stat:nth-child(3){border-left:0}
 .cta-layout{align-items:flex-start;flex-direction:column}
 .scene-main{min-height:330px}
 .scene-side-wrap{grid-template-columns:1fr 1fr;grid-template-rows:1fr}
}
@media(max-width:520px){
 .container{width:min(calc(100% - 28px),var(--container))}
 section{padding:56px 0}
 .topbar-inner{min-height:34px;font-size:12px}
 .logo{font-size:17px}
 .logo-mark{width:34px;height:34px;font-size:16px}
 .page-hero{min-height:520px}
 .hero-copy{padding:38px 0}
 h1{font-size:34px}
 .hero-copy p{font-size:16px}
 .hero-actions{align-items:stretch;flex-direction:column}
 .hero-actions .btn{width:100%}
 .matrix,.product-grid,.advantage-grid,.story-grid{grid-template-columns:1fr}
 .matrix-item{min-height:auto}
 .advantage{min-height:auto}
 .spec-strip{gap:8px}
 .spec strong{font-size:20px}
 .process{grid-template-columns:repeat(2,1fr)}
 .case-points{grid-template-columns:1fr 1fr}
 .case-number{font-size:58px}
 .stats-grid{grid-template-columns:1fr 1fr;gap:12px}
 .stat{padding:4px 12px}
 .stat strong{font-size:26px}
 .quote-text{font-size:21px}
 .scene-side-wrap{grid-template-columns:1fr;grid-template-rows:1fr 1fr}
 .scene-main{min-height:270px}
 .scene-side{min-height:180px}
 .article-card{grid-template-columns:112px 1fr;gap:14px}
 .article-card img{width:112px;height:116px}
 .article-card-body{padding:14px 12px 14px 0}
 .article-card h3{font-size:16px}
 .article-card p{font-size:13px;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
 .footer-grid{grid-template-columns:1fr;gap:28px}
 .footer-bottom{display:block;line-height:2}
 .footer-bottom span{display:block}
}

/* roulang page: category3 */
:root {
      --primary: #1769e0;
      --primary-dark: #0d4fb3;
      --primary-soft: #eaf3ff;
      --accent: #15a88a;
      --warning: #f59e0b;
      --ink: #152033;
      --muted: #66758a;
      --light: #f6f9fd;
      --surface: #ffffff;
      --line: #dfe7f1;
      --line-strong: #c9d7e8;
      --dark: #16202e;
      --dark-2: #233145;
      --shadow: 0 14px 34px rgba(24, 55, 90, .10);
      --shadow-soft: 0 8px 24px rgba(24, 55, 90, .08);
      --radius: 8px;
      --container: 1240px;
      --nav-height: 72px;
    }
    * {
      box-sizing: border-box;
    }
    html {
      scroll-behavior: smooth;
    }
    body {
      margin: 0;
      font-family: "Noto Sans SC", "PingFang SC", "Microsoft YaHei", Arial, sans-serif;
      color: var(--ink);
      background: #fff;
      line-height: 1.72;
      font-size: 16px;
    }
    a {
      color: inherit;
      text-decoration: none;
      transition: color .2s ease, background .2s ease, border-color .2s ease, box-shadow .2s ease;
    }
    img {
      max-width: 100%;
      display: block;
    }
    button,
    input,
    textarea,
    select {
      font: inherit;
    }
    button {
      cursor: pointer;
      border: 0;
      background: transparent;
    }
    input,
    textarea,
    select {
      width: 100%;
      border: 1px solid var(--line);
      border-radius: var(--radius);
      background: #fff;
      color: var(--ink);
      padding: 12px 14px;
      outline: none;
      transition: border-color .2s ease, box-shadow .2s ease;
    }
    textarea {
      min-height: 110px;
      resize: vertical;
    }
    input:focus,
    textarea:focus,
    select:focus,
    a:focus-visible,
    button:focus-visible {
      outline: 3px solid rgba(23, 105, 224, .22);
      outline-offset: 2px;
    }
    input:focus,
    textarea:focus,
    select:focus {
      border-color: var(--primary);
      box-shadow: 0 0 0 4px rgba(23, 105, 224, .10);
    }
    .container {
      width: min(100% - 40px, var(--container));
      margin: 0 auto;
    }
    .site-header {
      position: sticky;
      top: 0;
      z-index: 50;
      background: rgba(255, 255, 255, .96);
      backdrop-filter: blur(16px);
      border-bottom: 1px solid rgba(223, 231, 241, .85);
      box-shadow: 0 8px 24px rgba(24, 55, 90, .04);
    }
    .topbar {
      border-bottom: 1px solid var(--line);
      background: #f8fbff;
      color: var(--muted);
      font-size: 13px;
    }
    .topbar-inner {
      min-height: 38px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 18px;
    }
    .topbar-group {
      display: flex;
      flex-wrap: wrap;
      align-items: center;
      gap: 18px;
    }
    .topbar strong {
      color: var(--ink);
      font-weight: 600;
    }
    .nav-row {
      min-height: var(--nav-height);
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 28px;
    }
    .logo {
      display: inline-flex;
      align-items: center;
      gap: 10px;
      font-size: 20px;
      font-weight: 800;
      color: var(--ink);
      white-space: nowrap;
    }
    .logo-mark {
      width: 38px;
      height: 38px;
      border-radius: 8px;
      background: linear-gradient(135deg, var(--primary), #26b7d3);
      color: #fff;
      display: grid;
      place-items: center;
      font-size: 18px;
      box-shadow: 0 10px 22px rgba(23, 105, 224, .24);
      flex: 0 0 auto;
    }
    .main-nav {
      display: flex;
      align-items: center;
      gap: 4px;
      margin-left: auto;
    }
    .main-nav a {
      padding: 11px 13px;
      border-radius: 7px;
      color: #334158;
      font-size: 15px;
      font-weight: 600;
      white-space: nowrap;
    }
    .main-nav a:hover,
    .main-nav a.active {
      color: var(--primary);
      background: var(--primary-soft);
    }
    .nav-actions {
      display: flex;
      align-items: center;
      gap: 10px;
    }
    .menu-toggle {
      display: none;
      width: 44px;
      height: 44px;
      border: 1px solid var(--line);
      border-radius: 8px;
      color: var(--ink);
      background: #fff;
      align-items: center;
      justify-content: center;
      flex-direction: column;
      gap: 5px;
    }
    .menu-toggle span {
      width: 20px;
      height: 2px;
      background: currentColor;
      border-radius: 2px;
      transition: transform .2s ease, opacity .2s 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);
    }
    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      min-height: 44px;
      padding: 11px 18px;
      border-radius: 8px;
      border: 1px solid transparent;
      font-weight: 700;
      line-height: 1.2;
      gap: 8px;
      white-space: nowrap;
      transition: transform .2s ease, background .2s ease, border-color .2s ease, box-shadow .2s ease, color .2s ease;
    }
    .btn:hover {
      transform: translateY(-1px);
    }
    .btn-primary {
      color: #fff;
      background: var(--primary);
      box-shadow: 0 10px 22px rgba(23, 105, 224, .22);
    }
    .btn-primary:hover {
      background: var(--primary-dark);
      box-shadow: 0 14px 28px rgba(23, 105, 224, .28);
    }
    .btn-secondary {
      color: var(--primary);
      background: #fff;
      border-color: var(--line-strong);
    }
    .btn-secondary:hover {
      border-color: var(--primary);
      background: var(--primary-soft);
    }
    .btn-ghost {
      color: var(--ink);
      background: #fff;
      border-color: var(--line);
    }
    .btn-ghost:hover {
      color: var(--primary);
      border-color: var(--primary);
      box-shadow: var(--shadow-soft);
    }
    main {
      overflow: hidden;
    }
    section {
      padding: 76px 0;
    }
    .section-muted {
      background: var(--light);
    }
    .section-head {
      max-width: 850px;
      margin-bottom: 34px;
    }
    .section-head.center {
      margin-left: auto;
      margin-right: auto;
      text-align: center;
    }
    .eyebrow {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      min-height: 28px;
      padding: 4px 10px;
      border-radius: 999px;
      background: var(--primary-soft);
      color: var(--primary);
      font-size: 13px;
      font-weight: 700;
      margin-bottom: 14px;
    }
    .eyebrow::before {
      content: "";
      width: 7px;
      height: 7px;
      border-radius: 50%;
      background: var(--accent);
    }
    h1,
    h2,
    h3,
    p {
      margin-top: 0;
    }
    h1 {
      margin-bottom: 18px;
      font-size: 46px;
      line-height: 1.18;
      letter-spacing: 0;
      color: #102038;
      max-width: 820px;
    }
    h2 {
      margin-bottom: 14px;
      font-size: 34px;
      line-height: 1.25;
      letter-spacing: 0;
      color: #13223a;
    }
    h3 {
      margin-bottom: 10px;
      font-size: 20px;
      line-height: 1.35;
      color: #14233a;
    }
    p {
      color: var(--muted);
    }
    .lead {
      font-size: 18px;
      color: #44546a;
      max-width: 760px;
    }
    .hero {
      position: relative;
      min-height: 620px;
      display: flex;
      align-items: center;
      padding: 74px 0 52px;
      color: #fff;
      background: #17324f;
      overflow: hidden;
    }
    .hero::before {
      content: "";
      position: absolute;
      inset: 0;
      background:
        linear-gradient(90deg, rgba(12, 27, 48, .82), rgba(12, 27, 48, .58) 48%, rgba(12, 27, 48, .26)),
        url("/assets/images/c68096883080ea6a.webp") center/cover no-repeat;
      z-index: 0;
    }
    .hero::after {
      content: "";
      position: absolute;
      left: 0;
      right: 0;
      bottom: 0;
      height: 116px;
      background: linear-gradient(180deg, rgba(255,255,255,0), rgba(255,255,255,.96));
      z-index: 0;
    }
    .hero-inner {
      position: relative;
      z-index: 1;
      display: grid;
      grid-template-columns: minmax(0, 1fr) 390px;
      gap: 54px;
      align-items: end;
    }
    .hero h1,
    .hero p {
      color: #fff;
    }
    .hero .lead {
      color: rgba(255,255,255,.86);
      max-width: 760px;
    }
    .hero-badge {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      padding: 7px 12px;
      margin-bottom: 18px;
      border-radius: 999px;
      background: rgba(255,255,255,.14);
      border: 1px solid rgba(255,255,255,.28);
      color: #fff;
      font-size: 14px;
      font-weight: 700;
    }
    .hero-actions {
      display: flex;
      flex-wrap: wrap;
      gap: 12px;
      margin-top: 28px;
    }
    .countdown-panel {
      background: rgba(255,255,255,.94);
      color: var(--ink);
      border: 1px solid rgba(255,255,255,.65);
      border-radius: var(--radius);
      box-shadow: 0 18px 38px rgba(8, 30, 58, .22);
      padding: 22px;
    }
    .countdown-panel h2 {
      font-size: 22px;
      margin-bottom: 8px;
    }
    .countdown-panel p {
      margin-bottom: 16px;
      font-size: 14px;
    }
    .countdown {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 8px;
      margin: 16px 0 18px;
    }
    .time-box {
      padding: 10px 6px;
      border-radius: 7px;
      background: var(--primary-soft);
      border: 1px solid #d6e8ff;
      text-align: center;
    }
    .time-box strong {
      display: block;
      color: var(--primary);
      font-size: 22px;
      line-height: 1.1;
    }
    .time-box span {
      display: block;
      color: var(--muted);
      font-size: 12px;
      margin-top: 3px;
    }
    .quick-list {
      display: grid;
      gap: 10px;
      margin: 0;
      padding: 0;
      list-style: none;
    }
    .quick-list li {
      display: flex;
      gap: 9px;
      align-items: flex-start;
      color: #425168;
      font-size: 14px;
    }
    .quick-list li::before {
      content: "";
      width: 8px;
      height: 8px;
      margin-top: 8px;
      border-radius: 50%;
      background: var(--accent);
      flex: 0 0 auto;
    }
    .metric-row {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 14px;
      margin-top: -34px;
      position: relative;
      z-index: 2;
    }
    .metric-card {
      background: #fff;
      border: 1px solid var(--line);
      border-radius: var(--radius);
      box-shadow: var(--shadow);
      padding: 22px;
    }
    .metric-card strong {
      display: block;
      color: var(--primary);
      font-size: 30px;
      line-height: 1.15;
      margin-bottom: 5px;
    }
    .metric-card span {
      color: var(--muted);
      font-size: 14px;
    }
    .intro-layout {
      display: grid;
      grid-template-columns: .92fr 1.08fr;
      gap: 44px;
      align-items: center;
    }
    .image-frame {
      position: relative;
      border-radius: var(--radius);
      overflow: hidden;
      border: 1px solid var(--line);
      box-shadow: var(--shadow);
      background: #fff;
    }
    .image-frame img {
      width: 100%;
      aspect-ratio: 16 / 10;
      object-fit: cover;
    }
    .image-note {
      position: absolute;
      left: 18px;
      right: 18px;
      bottom: 18px;
      padding: 14px 16px;
      border-radius: 7px;
      background: rgba(255,255,255,.92);
      border: 1px solid rgba(223,231,241,.9);
      box-shadow: var(--shadow-soft);
      color: #334158;
      font-weight: 700;
    }
    .check-list {
      display: grid;
      gap: 14px;
      padding: 0;
      margin: 22px 0 0;
      list-style: none;
    }
    .check-list li {
      display: grid;
      grid-template-columns: 26px 1fr;
      gap: 12px;
      align-items: start;
      color: #3a495f;
    }
    .check-list li::before {
      content: "✓";
      width: 26px;
      height: 26px;
      display: grid;
      place-items: center;
      border-radius: 50%;
      background: #e9fbf6;
      color: var(--accent);
      font-weight: 800;
      line-height: 1;
    }
    .matrix-grid {
      display: grid;
      grid-template-columns: 1.1fr .9fr 1fr;
      gap: 18px;
    }
    .analysis-card {
      min-height: 218px;
      padding: 24px;
      border: 1px solid var(--line);
      border-radius: var(--radius);
      background: #fff;
      box-shadow: var(--shadow-soft);
      transition: transform .2s ease, box-shadow .2s ease, border-color .2s ease;
    }
    .analysis-card:hover {
      transform: translateY(-3px);
      border-color: #bfd4ef;
      box-shadow: var(--shadow);
    }
    .analysis-card.featured {
      grid-row: span 2;
      background: linear-gradient(180deg, #ffffff, #f2f8ff);
    }
    .card-icon {
      width: 42px;
      height: 42px;
      border-radius: 8px;
      display: grid;
      place-items: center;
      margin-bottom: 18px;
      color: var(--primary);
      background: var(--primary-soft);
      font-weight: 900;
    }
    .tag {
      display: inline-flex;
      align-items: center;
      padding: 4px 9px;
      border-radius: 999px;
      background: #eefaf7;
      color: #0c8b72;
      font-size: 12px;
      font-weight: 700;
      margin-top: 12px;
    }
    .flow-wrap {
      display: grid;
      grid-template-columns: 330px 1fr;
      gap: 34px;
      align-items: start;
    }
    .flow-aside {
      padding: 28px;
      border-radius: var(--radius);
      background: #fff;
      border: 1px solid var(--line);
      box-shadow: var(--shadow-soft);
    }
    .flow-steps {
      display: grid;
      gap: 14px;
      counter-reset: step;
    }
    .flow-step {
      position: relative;
      display: grid;
      grid-template-columns: 54px 1fr;
      gap: 16px;
      padding: 20px;
      border: 1px solid var(--line);
      border-radius: var(--radius);
      background: #fff;
      box-shadow: var(--shadow-soft);
    }
    .flow-step::before {
      counter-increment: step;
      content: counter(step, decimal-leading-zero);
      width: 54px;
      height: 54px;
      display: grid;
      place-items: center;
      border-radius: 8px;
      background: var(--primary-soft);
      color: var(--primary);
      font-weight: 900;
    }
    .dark-section {
      background: var(--dark);
      color: #fff;
      position: relative;
    }
    .dark-section h2,
    .dark-section h3,
    .dark-section p {
      color: #fff;
    }
    .dark-section .lead,
    .dark-section p {
      color: rgba(255,255,255,.72);
    }
    .case-layout {
      display: grid;
      grid-template-columns: 1fr 1.1fr;
      gap: 34px;
      align-items: center;
    }
    .case-panel {
      padding: 28px;
      border-radius: var(--radius);
      background: rgba(255,255,255,.07);
      border: 1px solid rgba(255,255,255,.16);
    }
    .case-panel img {
      width: 100%;
      aspect-ratio: 16 / 9;
      object-fit: cover;
      border-radius: 7px;
      margin-bottom: 18px;
    }
    .case-stats {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 12px;
      margin-top: 22px;
    }
    .case-stat {
      padding: 16px;
      border-radius: 7px;
      background: rgba(255,255,255,.08);
      border: 1px solid rgba(255,255,255,.14);
    }
    .case-stat strong {
      display: block;
      color: #8be2cd;
      font-size: 26px;
      line-height: 1.15;
    }
    .case-stat span {
      color: rgba(255,255,255,.72);
      font-size: 13px;
    }
    .article-list {
      display: grid;
      gap: 18px;
    }
    .article-item {
      display: grid;
      grid-template-columns: 240px 1fr auto;
      gap: 22px;
      align-items: center;
      padding: 16px;
      border: 1px solid var(--line);
      border-radius: var(--radius);
      background: #fff;
      box-shadow: var(--shadow-soft);
    }
    .article-item img {
      width: 100%;
      aspect-ratio: 16 / 10;
      object-fit: cover;
      border-radius: 7px;
    }
    .article-meta {
      display: flex;
      gap: 10px;
      flex-wrap: wrap;
      color: var(--muted);
      font-size: 13px;
      margin-bottom: 8px;
    }
    .partners {
      display: grid;
      grid-template-columns: repeat(5, 1fr);
      gap: 14px;
    }
    .partner-card {
      min-height: 110px;
      padding: 18px;
      border: 1px solid var(--line);
      border-radius: var(--radius);
      background: #fff;
      box-shadow: var(--shadow-soft);
      display: flex;
      flex-direction: column;
      justify-content: center;
      gap: 6px;
    }
    .partner-card strong {
      color: #233145;
      font-size: 16px;
    }
    .partner-card span {
      color: var(--muted);
      font-size: 13px;
    }
    .faq-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 18px;
    }
    .faq-item {
      padding: 24px;
      border-radius: var(--radius);
      border: 1px solid var(--line);
      background: #fff;
      box-shadow: var(--shadow-soft);
    }
    .faq-item h3 {
      font-size: 18px;
      margin-bottom: 8px;
    }
    .assurance {
      padding: 42px 0;
      background: #eef6ff;
      border-top: 1px solid #d9e9fb;
      border-bottom: 1px solid #d9e9fb;
    }
    .assurance-row {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 16px;
    }
    .assurance-item {
      display: flex;
      gap: 12px;
      align-items: flex-start;
      padding: 18px;
      border-radius: var(--radius);
      background: #fff;
      border: 1px solid var(--line);
      box-shadow: var(--shadow-soft);
    }
    .assurance-item b {
      display: grid;
      place-items: center;
      width: 32px;
      height: 32px;
      flex: 0 0 auto;
      border-radius: 8px;
      background: var(--primary);
      color: #fff;
    }
    .assurance-item strong {
      display: block;
      margin-bottom: 2px;
    }
    .assurance-item span {
      color: var(--muted);
      font-size: 13px;
    }
    .contact-layout {
      display: grid;
      grid-template-columns: .95fr 1.05fr;
      gap: 34px;
      align-items: start;
    }
    .contact-card,
    .form-card {
      border: 1px solid var(--line);
      border-radius: var(--radius);
      background: #fff;
      box-shadow: var(--shadow);
      padding: 28px;
    }
    .contact-info {
      display: grid;
      gap: 13px;
      margin-top: 18px;
    }
    .contact-info span {
      display: block;
      padding: 13px 14px;
      border-radius: 7px;
      background: var(--light);
      color: #344258;
    }
    .form-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 14px;
    }
    .form-grid .full {
      grid-column: 1 / -1;
    }
    .form-help {
      margin: 12px 0 0;
      font-size: 13px;
      color: var(--muted);
    }
    .site-footer {
      background: #111a27;
      color: rgba(255,255,255,.78);
      padding: 58px 0 24px;
    }
    .footer-grid {
      display: grid;
      grid-template-columns: 1.25fr .85fr .85fr 1.15fr;
      gap: 34px;
      padding-bottom: 34px;
      border-bottom: 1px solid rgba(255,255,255,.12);
    }
    .footer-logo {
      display: inline-flex;
      align-items: center;
      gap: 10px;
      color: #fff;
      font-size: 19px;
      font-weight: 800;
      margin-bottom: 14px;
    }
    .footer-title {
      color: #fff;
      font-weight: 800;
      margin-bottom: 14px;
    }
    .footer-links {
      display: grid;
      gap: 8px;
      color: rgba(255,255,255,.70);
      font-size: 14px;
    }
    .footer-links a:hover {
      color: #fff;
    }
    .footer-bottom {
      display: flex;
      justify-content: space-between;
      gap: 16px;
      flex-wrap: wrap;
      padding-top: 22px;
      color: rgba(255,255,255,.62);
      font-size: 13px;
    }
    .footer-bottom a:hover {
      color: #fff;
    }
    @media (max-width: 1120px) {
      .main-nav a {
        padding: 10px 9px;
        font-size: 14px;
      }
      .hero-inner,
      .intro-layout,
      .case-layout,
      .contact-layout {
        grid-template-columns: 1fr;
      }
      .countdown-panel {
        max-width: 520px;
      }
      .flow-wrap {
        grid-template-columns: 1fr;
      }
      .partners,
      .metric-row,
      .assurance-row {
        grid-template-columns: repeat(2, 1fr);
      }
      .article-item {
        grid-template-columns: 190px 1fr;
      }
      .article-item .btn {
        grid-column: 2;
        justify-self: start;
      }
    }
    @media (max-width: 900px) {
      .topbar {
        display: none;
      }
      .nav-row {
        min-height: 64px;
      }
      .menu-toggle {
        display: inline-flex;
      }
      .main-nav {
        position: absolute;
        left: 20px;
        right: 20px;
        top: 64px;
        display: none;
        flex-direction: column;
        align-items: stretch;
        margin: 0;
        padding: 14px;
        background: #fff;
        border: 1px solid var(--line);
        border-radius: var(--radius);
        box-shadow: var(--shadow);
      }
      .main-nav.is-open {
        display: flex;
      }
      .main-nav a {
        padding: 12px 14px;
      }
      .nav-actions .btn {
        display: none;
      }
      h1 {
        font-size: 34px;
      }
      h2 {
        font-size: 28px;
      }
      section {
        padding: 58px 0;
      }
      .hero {
        min-height: auto;
        padding: 56px 0 82px;
      }
      .matrix-grid {
        grid-template-columns: 1fr 1fr;
      }
      .analysis-card.featured {
        grid-row: auto;
      }
      .faq-grid,
      .footer-grid {
        grid-template-columns: 1fr 1fr;
      }
    }
    @media (max-width: 640px) {
      .container {
        width: min(100% - 28px, var(--container));
      }
      .logo {
        font-size: 17px;
      }
      .logo-mark {
        width: 34px;
        height: 34px;
        font-size: 16px;
      }
      .hero-actions,
      .countdown-panel .hero-actions {
        flex-direction: column;
      }
      .btn {
        width: 100%;
        white-space: normal;
        text-align: center;
      }
      .metric-row,
      .matrix-grid,
      .partners,
      .faq-grid,
      .assurance-row,
      .case-stats,
      .form-grid {
        grid-template-columns: 1fr;
      }
      .article-item {
        grid-template-columns: 1fr;
      }
      .article-item .btn {
        grid-column: auto;
      }
      .flow-step {
        grid-template-columns: 1fr;
      }
      .countdown {
        grid-template-columns: repeat(4, minmax(0, 1fr));
      }
      .time-box strong {
        font-size: 18px;
      }
      .footer-grid {
        grid-template-columns: 1fr;
      }
      .footer-bottom {
        display: grid;
      }
    }

/* roulang page: category4 */
:root {
      --primary: #1769e0;
      --primary-dark: #0d4fb3;
      --primary-soft: #eaf3ff;
      --accent: #15a88a;
      --warning: #f59e0b;
      --ink: #152033;
      --muted: #66758a;
      --light: #f6f9fd;
      --surface: #ffffff;
      --line: #dfe7f1;
      --line-strong: #c9d7e8;
      --dark: #16202e;
      --dark-2: #233145;
      --shadow: 0 14px 34px rgba(24, 55, 90, .10);
      --shadow-soft: 0 8px 24px rgba(24, 55, 90, .08);
      --radius: 8px;
      --container: 1240px;
      --nav-height: 72px;
    }

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

    html { scroll-behavior: smooth; }

    body {
      margin: 0;
      font-family: "Noto Sans SC", "PingFang SC", "Microsoft YaHei", Arial, sans-serif;
      color: var(--ink);
      background: #fff;
      line-height: 1.72;
      font-size: 16px;
      overflow-x: hidden;
    }

    a {
      color: inherit;
      text-decoration: none;
      transition: color .2s ease, background .2s ease, border-color .2s ease, box-shadow .2s ease;
    }

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

    button,
    input,
    textarea { font: inherit; }

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

    input,
    textarea {
      width: 100%;
      border: 1px solid var(--line);
      border-radius: var(--radius);
      background: #fff;
      color: var(--ink);
      padding: 12px 14px;
      outline: none;
      transition: border-color .2s ease, box-shadow .2s ease;
    }

    input:focus,
    textarea:focus,
    a:focus-visible,
    button:focus-visible {
      outline: 3px solid rgba(23, 105, 224, .22);
      outline-offset: 2px;
    }

    input:focus,
    textarea:focus {
      border-color: var(--primary);
      box-shadow: 0 0 0 4px rgba(23, 105, 224, .10);
    }

    .container {
      width: min(100% - 40px, var(--container));
      margin: 0 auto;
    }

    .site-header {
      position: sticky;
      top: 0;
      z-index: 50;
      background: rgba(255, 255, 255, .97);
      backdrop-filter: blur(16px);
      border-bottom: 1px solid rgba(223, 231, 241, .85);
      box-shadow: 0 8px 24px rgba(24, 55, 90, .04);
    }

    .topbar {
      border-bottom: 1px solid var(--line);
      background: #f8fbff;
      color: var(--muted);
      font-size: 13px;
    }

    .topbar-inner {
      min-height: 38px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 18px;
    }

    .topbar-group {
      display: flex;
      flex-wrap: wrap;
      align-items: center;
      gap: 18px;
    }

    .topbar strong {
      color: var(--ink);
      font-weight: 600;
    }

    .nav-row {
      min-height: var(--nav-height);
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 28px;
    }

    .logo,
    .footer-logo {
      display: inline-flex;
      align-items: center;
      gap: 10px;
      font-size: 20px;
      font-weight: 800;
      color: var(--ink);
      white-space: nowrap;
    }

    .logo-mark {
      width: 38px;
      height: 38px;
      border-radius: 8px;
      background: var(--primary);
      color: #fff;
      display: grid;
      place-items: center;
      font-size: 18px;
      box-shadow: 0 10px 22px rgba(23, 105, 224, .24);
    }

    .main-nav {
      display: flex;
      align-items: center;
      gap: 4px;
      margin-left: auto;
    }

    .main-nav a {
      padding: 11px 13px;
      border-radius: 7px;
      color: #334158;
      font-size: 15px;
      font-weight: 600;
      white-space: nowrap;
    }

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

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

    .menu-toggle {
      display: none;
      width: 44px;
      height: 44px;
      border: 1px solid var(--line);
      border-radius: 8px;
      color: var(--ink);
      background: #fff;
      align-items: center;
      justify-content: center;
      flex-direction: column;
      gap: 5px;
    }

    .menu-toggle span {
      width: 20px;
      height: 2px;
      background: currentColor;
      border-radius: 2px;
      transition: transform .2s ease, opacity .2s ease;
    }

    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      min-height: 44px;
      padding: 11px 18px;
      border-radius: 8px;
      border: 1px solid transparent;
      font-weight: 700;
      line-height: 1.2;
      gap: 8px;
      white-space: nowrap;
      transition: transform .2s ease, background .2s ease, border-color .2s ease, box-shadow .2s ease, color .2s ease;
    }

    .btn:hover { transform: translateY(-1px); }

    .btn-primary {
      color: #fff;
      background: var(--primary);
      box-shadow: 0 10px 22px rgba(23, 105, 224, .22);
    }

    .btn-primary:hover {
      background: var(--primary-dark);
      box-shadow: 0 14px 28px rgba(23, 105, 224, .28);
    }

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

    .btn-secondary:hover {
      border-color: var(--primary);
      background: var(--primary-soft);
    }

    .btn-ghost {
      color: var(--ink);
      background: #fff;
      border-color: var(--line);
    }

    .btn-ghost:hover {
      color: var(--primary);
      border-color: var(--primary);
      box-shadow: var(--shadow-soft);
    }

    main { overflow: hidden; }

    section { padding: 78px 0; }

    .section-muted {
      background: var(--light);
      border-top: 1px solid #edf2f8;
      border-bottom: 1px solid #edf2f8;
    }

    .section-head {
      max-width: 820px;
      margin-bottom: 34px;
    }

    .section-head.center {
      margin-left: auto;
      margin-right: auto;
      text-align: center;
    }

    .eyebrow {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      min-height: 28px;
      padding: 4px 10px;
      border-radius: 999px;
      background: var(--primary-soft);
      color: var(--primary);
      font-size: 13px;
      font-weight: 700;
      margin-bottom: 14px;
    }

    .eyebrow::before {
      content: "";
      width: 7px;
      height: 7px;
      border-radius: 50%;
      background: var(--accent);
    }

    h1,
    h2,
    h3,
    p { margin-top: 0; }

    h1,
    h2,
    h3 {
      line-height: 1.25;
      letter-spacing: 0;
    }

    h1 {
      max-width: 760px;
      margin-bottom: 20px;
      color: #fff;
      font-size: clamp(38px, 5vw, 64px);
      font-weight: 800;
    }

    h2 {
      margin-bottom: 14px;
      font-size: 36px;
      font-weight: 800;
    }

    h3 {
      margin-bottom: 9px;
      font-size: 20px;
    }

    .section-head p,
    .lead {
      color: var(--muted);
      font-size: 17px;
      margin-bottom: 0;
    }

    .hero-inner {
      min-height: 520px;
      display: flex;
      align-items: center;
    }

    .page-hero {
      position: relative;
      isolation: isolate;
      min-height: 520px;
      display: flex;
      align-items: center;
      background:
        linear-gradient(90deg, rgba(15, 31, 52, .88) 0%, rgba(15, 31, 52, .68) 48%, rgba(15, 31, 52, .20) 100%),
        url("/assets/images/3bb354ab4088f8a0.webp") center / cover no-repeat;
    }

    .page-hero::after {
      content: "";
      position: absolute;
      right: 8%;
      bottom: 48px;
      width: 280px;
      height: 1px;
      background: rgba(255, 255, 255, .48);
      box-shadow: 0 -12px 0 rgba(255,255,255,.16), 0 12px 0 rgba(255,255,255,.16);
      opacity: .7;
    }

    .hero-content {
      position: relative;
      z-index: 1;
      max-width: 780px;
    }

    .hero-content .eyebrow {
      background: rgba(255, 255, 255, .14);
      color: #fff;
    }

    .hero-content .eyebrow::before { background: #55d5b3; }

    .hero-content p {
      max-width: 700px;
      color: rgba(255, 255, 255, .84);
      font-size: 18px;
      margin-bottom: 28px;
    }

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

    .hero-actions .btn-secondary {
      color: #fff;
      border-color: rgba(255,255,255,.56);
      background: rgba(255,255,255,.08);
    }

    .hero-actions .btn-secondary:hover {
      color: var(--ink);
      background: #fff;
    }

    .crumbs {
      position: absolute;
      left: 0;
      right: 0;
      top: 24px;
      z-index: 2;
      color: rgba(255,255,255,.72);
      font-size: 13px;
    }

    .crumbs a:hover { color: #fff; }

    .intro-layout {
      display: grid;
      grid-template-columns: .92fr 1.08fr;
      gap: 68px;
      align-items: center;
    }

    .intro-copy h2 { max-width: 570px; }

    .intro-copy p {
      color: var(--muted);
      margin-bottom: 22px;
    }

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

    .check-list li {
      display: flex;
      align-items: flex-start;
      gap: 11px;
      color: #334158;
    }

    .check-list li::before {
      content: "✓";
      display: grid;
      flex: 0 0 22px;
      width: 22px;
      height: 22px;
      place-items: center;
      border-radius: 50%;
      color: var(--accent);
      background: #e8f8f4;
      font-size: 13px;
      font-weight: 800;
      margin-top: 3px;
    }

    .image-frame {
      position: relative;
      overflow: hidden;
      border-radius: 8px;
      border: 1px solid var(--line);
      background: #e8f0fa;
      box-shadow: var(--shadow);
    }

    .image-frame img {
      width: 100%;
      aspect-ratio: 1.35 / 1;
      object-fit: cover;
    }

    .image-note {
      position: absolute;
      left: 18px;
      bottom: 18px;
      max-width: 250px;
      padding: 12px 14px;
      border-left: 3px solid var(--accent);
      color: #fff;
      background: rgba(21, 32, 51, .86);
      font-size: 13px;
      line-height: 1.5;
    }

    .scenario-layout {
      display: grid;
      grid-template-columns: 1fr 1.65fr;
      gap: 48px;
      align-items: start;
    }

    .scenario-intro {
      padding-right: 24px;
      border-right: 1px solid var(--line);
    }

    .scenario-intro .metric {
      margin-top: 34px;
      padding-top: 20px;
      border-top: 1px solid var(--line);
    }

    .metric strong {
      display: block;
      color: var(--primary);
      font-size: 42px;
      line-height: 1;
      margin-bottom: 8px;
    }

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

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

    .scenario-card {
      min-height: 190px;
      padding: 24px;
      border: 1px solid var(--line);
      border-radius: var(--radius);
      background: var(--surface);
      box-shadow: var(--shadow-soft);
      transition: transform .2s ease, box-shadow .2s ease, border-color .2s ease;
    }

    .scenario-card:hover {
      transform: translateY(-3px);
      border-color: #a9c9f5;
      box-shadow: var(--shadow);
    }

    .scenario-card:nth-child(2) { margin-top: 24px; }
    .scenario-card:nth-child(4) { margin-top: -10px; }

    .card-topline {
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 12px;
      margin-bottom: 20px;
    }

    .card-index {
      color: var(--primary);
      font-size: 13px;
      font-weight: 800;
      letter-spacing: .08em;
    }

    .status {
      display: inline-flex;
      align-items: center;
      gap: 6px;
      color: var(--accent);
      font-size: 12px;
      font-weight: 700;
    }

    .status::before {
      content: "";
      width: 7px;
      height: 7px;
      border-radius: 50%;
      background: currentColor;
    }

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

    .split-band {
      background: #f3f8fe;
    }

    .split-layout {
      display: grid;
      grid-template-columns: 1.08fr .92fr;
      gap: 56px;
      align-items: center;
    }

    .split-image {
      order: 2;
    }

    .split-copy { order: 1; }

    .data-points {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 12px;
      margin-top: 27px;
    }

    .data-point {
      padding: 16px;
      border-left: 3px solid var(--primary);
      background: #fff;
      box-shadow: 0 5px 18px rgba(24,55,90,.05);
    }

    .data-point strong {
      display: block;
      margin-bottom: 3px;
      font-size: 17px;
    }

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

    .module-section { background: #fff; }

    .module-grid {
      display: grid;
      grid-template-columns: 1.16fr .84fr .84fr;
      gap: 18px;
      align-items: stretch;
    }

    .module-card {
      display: flex;
      min-height: 330px;
      flex-direction: column;
      overflow: hidden;
      border: 1px solid var(--line);
      border-radius: var(--radius);
      background: #fff;
      box-shadow: var(--shadow-soft);
      transition: transform .2s ease, box-shadow .2s ease;
    }

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

    .module-card.featured { background: #f8fbff; }

    .module-card img {
      width: 100%;
      height: 156px;
      object-fit: cover;
    }

    .module-body {
      display: flex;
      flex: 1;
      flex-direction: column;
      padding: 22px;
    }

    .module-label {
      color: var(--primary);
      font-size: 12px;
      font-weight: 800;
      margin-bottom: 8px;
    }

    .module-body p {
      color: var(--muted);
      font-size: 14px;
      margin-bottom: 17px;
    }

    .text-link {
      display: inline-flex;
      align-items: center;
      gap: 7px;
      color: var(--primary);
      font-weight: 700;
      font-size: 14px;
      margin-top: auto;
    }

    .text-link:hover { color: var(--primary-dark); }

    .timeline-section {
      background: var(--light);
      border-top: 1px solid #edf2f8;
      border-bottom: 1px solid #edf2f8;
    }

    .timeline {
      display: grid;
      grid-template-columns: repeat(5, 1fr);
      position: relative;
      gap: 18px;
      margin-top: 42px;
    }

    .timeline::before {
      content: "";
      position: absolute;
      top: 18px;
      left: 8%;
      right: 8%;
      height: 1px;
      background: #b9cce4;
    }

    .timeline-item {
      position: relative;
      z-index: 1;
      padding-right: 10px;
    }

    .timeline-number {
      display: grid;
      width: 36px;
      height: 36px;
      place-items: center;
      margin-bottom: 20px;
      border: 5px solid var(--light);
      border-radius: 50%;
      color: #fff;
      background: var(--primary);
      font-size: 13px;
      font-weight: 800;
      box-shadow: 0 0 0 1px #9db9dd;
    }

    .timeline-item:nth-child(even) .timeline-number { background: var(--accent); }

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

    .dark-case {
      padding: 82px 0;
      color: #fff;
      background: var(--dark);
    }

    .dark-case .section-head p { color: #aebccd; }
    .dark-case .eyebrow { background: #263548; color: #83b8ff; }

    .case-layout {
      display: grid;
      grid-template-columns: .82fr 1.18fr;
      gap: 70px;
      align-items: center;
    }

    .case-number {
      color: #65d1b4;
      font-size: clamp(54px, 8vw, 92px);
      line-height: 1;
      font-weight: 800;
      margin-bottom: 14px;
    }

    .case-number small {
      color: #fff;
      font-size: 22px;
      font-weight: 600;
    }

    .case-summary {
      color: #c0ccda;
      font-size: 16px;
      max-width: 380px;
    }

    .case-panel {
      padding: 30px;
      border: 1px solid #3a4a5d;
      border-radius: 8px;
      background: var(--dark-2);
    }

    .case-panel h3 { color: #fff; }

    .case-panel p {
      color: #b8c5d4;
      margin-bottom: 22px;
    }

    .result-list {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 12px;
    }

    .result-item {
      padding-top: 15px;
      border-top: 1px solid #506174;
    }

    .result-item strong {
      display: block;
      color: #fff;
      font-size: 22px;
      margin-bottom: 3px;
    }

    .result-item span {
      color: #9fb0c4;
      font-size: 12px;
    }

    .stories-layout {
      display: grid;
      grid-template-columns: .74fr 1.26fr;
      gap: 56px;
      align-items: start;
    }

    .story-aside {
      padding-top: 8px;
    }

    .story-aside img {
      width: 100%;
      aspect-ratio: 1.3 / 1;
      object-fit: cover;
      border-radius: 8px;
      border: 1px solid var(--line);
      box-shadow: var(--shadow-soft);
      margin-top: 24px;
    }

    .story-list {
      border-top: 1px solid var(--line);
    }

    .story-item {
      display: grid;
      grid-template-columns: 130px 1fr;
      gap: 24px;
      padding: 23px 0;
      border-bottom: 1px solid var(--line);
    }

    .story-meta {
      color: var(--primary);
      font-size: 13px;
      font-weight: 800;
    }

    .story-item h3 { margin-bottom: 6px; }

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

    .stats-strip {
      padding: 36px 0;
      color: #fff;
      background: var(--primary);
    }

    .stats-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 24px;
    }

    .stat {
      padding-left: 22px;
      border-left: 1px solid rgba(255,255,255,.38);
    }

    .stat strong {
      display: block;
      font-size: 32px;
      line-height: 1.2;
      margin-bottom: 5px;
    }

    .stat span {
      color: rgba(255,255,255,.78);
      font-size: 13px;
    }

    .quote-section { background: #fff; }

    .quote-layout {
      display: grid;
      grid-template-columns: 1.15fr .85fr;
      gap: 56px;
      align-items: center;
    }

    blockquote {
      margin: 0;
      padding-left: 27px;
      border-left: 4px solid var(--accent);
      color: #26364d;
      font-size: 26px;
      line-height: 1.55;
      font-weight: 600;
    }

    .quote-source {
      margin-top: 22px;
      padding-left: 31px;
      color: var(--muted);
      font-size: 14px;
    }

    .quote-tags {
      display: flex;
      flex-wrap: wrap;
      justify-content: flex-end;
      gap: 10px;
    }

    .tag {
      display: inline-flex;
      align-items: center;
      min-height: 32px;
      padding: 5px 11px;
      border: 1px solid var(--line);
      border-radius: 999px;
      color: #4b5d75;
      background: #f8fbff;
      font-size: 13px;
    }

    .faq-section { background: var(--light); }

    .faq-list {
      max-width: 920px;
      margin: 0 auto;
      border-top: 1px solid var(--line);
    }

    .faq-item { border-bottom: 1px solid var(--line); }

    .faq-question {
      width: 100%;
      min-height: 70px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 20px;
      color: var(--ink);
      text-align: left;
      font-weight: 700;
      padding: 18px 0;
    }

    .faq-question span:last-child {
      color: var(--primary);
      font-size: 25px;
      font-weight: 400;
      transition: transform .2s ease;
    }

    .faq-item.open .faq-question span:last-child { transform: rotate(45deg); }

    .faq-answer {
      display: none;
      max-width: 840px;
      padding: 0 42px 22px 0;
      color: var(--muted);
      font-size: 14px;
    }

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

    .contact-section {
      padding: 78px 0;
      background: #eaf3ff;
    }

    .contact-layout {
      display: grid;
      grid-template-columns: 1fr .9fr;
      gap: 60px;
      align-items: center;
    }

    .contact-copy p {
      max-width: 570px;
      color: var(--muted);
    }

    .contact-points {
      display: flex;
      flex-wrap: wrap;
      gap: 9px 20px;
      margin-top: 22px;
      color: #44556d;
      font-size: 14px;
    }

    .contact-form {
      padding: 26px;
      border: 1px solid #c9dcef;
      border-radius: 8px;
      background: #fff;
      box-shadow: var(--shadow);
    }

    .form-grid {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 13px;
      margin-bottom: 13px;
    }

    .form-field label {
      display: block;
      color: #44556d;
      font-size: 13px;
      font-weight: 700;
      margin-bottom: 6px;
    }

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

    textarea {
      min-height: 92px;
      resize: vertical;
    }

    .form-foot {
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 16px;
      margin-top: 15px;
    }

    .form-message {
      color: var(--accent);
      font-size: 13px;
      font-weight: 600;
    }

    .site-footer {
      padding: 52px 0 20px;
      color: #aebccc;
      background: var(--dark);
    }

    .footer-grid {
      display: grid;
      grid-template-columns: 1.15fr .9fr .8fr 1fr;
      gap: 38px;
      padding-bottom: 36px;
      border-bottom: 1px solid #354456;
    }

    .footer-logo { color: #fff; font-size: 19px; }

    .site-footer .logo-mark { box-shadow: none; }

    .site-footer p {
      max-width: 285px;
      color: #aebccc;
      font-size: 13px;
      margin: 17px 0 0;
    }

    .footer-title {
      color: #fff;
      font-size: 15px;
      font-weight: 700;
      margin-bottom: 14px;
    }

    .footer-links {
      display: grid;
      gap: 8px;
      color: #aebccc;
      font-size: 13px;
    }

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

    .footer-bottom {
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 20px;
      padding-top: 18px;
      color: #8596a9;
      font-size: 12px;
    }

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

    @media (max-width: 1100px) {
      .main-nav a { padding-left: 8px; padding-right: 8px; font-size: 14px; }
      .nav-row { gap: 14px; }
      .intro-layout,
      .split-layout,
      .case-layout,
      .stories-layout,
      .contact-layout { gap: 38px; }
      .footer-grid { grid-template-columns: repeat(2, 1fr); }
    }

    @media (max-width: 860px) {
      .topbar-group:last-child { display: none; }
      .menu-toggle { display: flex; }
      .nav-actions .btn { display: none; }
      .main-nav {
        position: absolute;
        top: calc(100% + 1px);
        left: 20px;
        right: 20px;
        display: none;
        flex-direction: column;
        align-items: stretch;
        gap: 4px;
        padding: 10px;
        border: 1px solid var(--line);
        border-radius: 8px;
        background: #fff;
        box-shadow: var(--shadow);
      }
      .main-nav.open { display: flex; }
      .main-nav a { width: 100%; }
      .intro-layout,
      .split-layout,
      .case-layout,
      .stories-layout,
      .quote-layout,
      .contact-layout { grid-template-columns: 1fr; }
      .split-image { order: 1; }
      .split-copy { order: 2; }
      .scenario-layout { grid-template-columns: 1fr; }
      .scenario-intro {
        padding-right: 0;
        border-right: 0;
        border-bottom: 1px solid var(--line);
        padding-bottom: 25px;
      }
      .module-grid { grid-template-columns: repeat(2, 1fr); }
      .module-card.featured { grid-column: 1 / -1; }
      .timeline { grid-template-columns: repeat(3, 1fr); row-gap: 28px; }
      .timeline::before { display: none; }
      .quote-tags { justify-content: flex-start; }
      .stats-grid { grid-template-columns: repeat(2, 1fr); row-gap: 24px; }
    }

    @media (max-width: 600px) {
      .container { width: min(100% - 28px, var(--container)); }
      section,
      .dark-case,
      .contact-section { padding: 56px 0; }
      .topbar-inner { min-height: 34px; }
      .topbar-group { gap: 10px; font-size: 12px; }
      .logo { font-size: 17px; }
      .logo-mark { width: 34px; height: 34px; font-size: 16px; }
      .page-hero { min-height: 545px; background-position: 62% center; }
      .page-hero::after { display: none; }
      .hero-inner { min-height: 545px; }
      h1 { font-size: 38px; }
      h2 { font-size: 29px; }
      .hero-content p { font-size: 16px; }
      .hero-actions { align-items: stretch; flex-direction: column; max-width: 260px; }
      .hero-actions .btn { width: 100%; }
      .scenario-grid,
      .module-grid,
      .data-points,
      .form-grid { grid-template-columns: 1fr; }
      .scenario-card:nth-child(2),
      .scenario-card:nth-child(4) { margin-top: 0; }
      .module-card.featured { grid-column: auto; }
      .module-card { min-height: 0; }
      .timeline { grid-template-columns: 1fr; margin-top: 25px; }
      .timeline-item {
        display: grid;
        grid-template-columns: 42px 1fr;
        gap: 13px;
      }
      .timeline-number { margin-bottom: 0; }
      .result-list { grid-template-columns: 1fr; }
      blockquote { font-size: 21px; padding-left: 18px; }
      .quote-source { padding-left: 22px; }
      .faq-question { min-height: 62px; font-size: 15px; }
      .faq-answer { padding-right: 10px; }
      .form-field.full { grid-column: auto; }
      .form-foot,
      .footer-bottom { align-items: flex-start; flex-direction: column; }
      .footer-grid { grid-template-columns: 1fr; gap: 27px; }
    }

    @media (max-width: 375px) {
      .container { width: calc(100% - 24px); }
      .topbar-group span:nth-child(2) { display: none; }
      .logo { font-size: 16px; }
      h1 { font-size: 34px; }
      .btn { white-space: normal; text-align: center; }
    }