/* roulang page: index */
:root {
      --bg: #0f0c20;
      --bg-deep: #071326;
      --panel: rgba(17, 29, 54, 0.78);
      --panel-solid: #101c34;
      --panel-soft: rgba(13, 39, 63, 0.74);
      --text: #ffffff;
      --muted: #a6acaf;
      --soft: #d7eff4;
      --cyan: #00f0ff;
      --lime: #ccff00;
      --blue: #2c63ff;
      --pink: #ff3ab5;
      --line: rgba(0, 240, 255, 0.22);
      --line-strong: rgba(204, 255, 0, 0.42);
      --shadow: 0 22px 70px rgba(0, 0, 0, 0.45);
      --glow: 0 0 24px rgba(0, 240, 255, 0.26);
      --radius-sm: 8px;
      --radius-md: 14px;
      --radius-lg: 22px;
      --container: 1180px;
      --font: "Inter", "Segoe UI", Roboto, Arial, sans-serif;
    }

    * {
      box-sizing: border-box;
    }

    html {
      scroll-behavior: smooth;
    }

    body {
      margin: 0;
      font-family: var(--font);
      color: var(--text);
      background:
        radial-gradient(circle at 16% 0%, rgba(0, 240, 255, 0.18), transparent 32%),
        radial-gradient(circle at 88% 18%, rgba(204, 255, 0, 0.12), transparent 30%),
        linear-gradient(145deg, var(--bg), var(--bg-deep) 58%, #06101f);
      line-height: 1.62;
      overflow-x: hidden;
    }

    body::before {
      content: "";
      position: fixed;
      inset: 0;
      pointer-events: none;
      background-image:
        linear-gradient(rgba(255, 255, 255, 0.035) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255, 255, 255, 0.03) 1px, transparent 1px);
      background-size: 42px 42px;
      mask-image: linear-gradient(to bottom, rgba(0,0,0,0.75), transparent 82%);
      z-index: -2;
    }

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

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

    button,
    input,
    textarea {
      font: inherit;
    }

    button {
      cursor: pointer;
    }

    .container {
      width: min(var(--container), calc(100% - 32px));
      margin: 0 auto;
    }

    .site-header {
      position: sticky;
      top: 0;
      z-index: 100;
      border-bottom: 1px solid rgba(0, 240, 255, 0.2);
      background: rgba(7, 13, 28, 0.86);
      backdrop-filter: blur(18px);
      box-shadow: 0 12px 34px rgba(0, 0, 0, 0.28);
    }

    .nav-shell {
      min-height: 76px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 18px;
    }

    .brand {
      display: flex;
      align-items: center;
      gap: 12px;
      min-width: 210px;
    }

    .brand-mark {
      width: 44px;
      height: 44px;
      display: grid;
      place-items: center;
      border-radius: 14px;
      color: #05111e;
      background: linear-gradient(135deg, var(--lime), var(--cyan));
      box-shadow: 0 0 26px rgba(0, 240, 255, 0.35);
      flex: 0 0 auto;
    }

    .brand-name {
      font-weight: 800;
      letter-spacing: 0;
      line-height: 1.15;
      font-size: 0.98rem;
      max-width: 330px;
    }

    .brand-name span {
      display: block;
      color: var(--muted);
      font-size: 0.77rem;
      font-weight: 600;
      margin-top: 3px;
    }

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

    .desktop-nav a {
      color: var(--soft);
      padding: 10px 12px;
      border-radius: 999px;
      font-size: 0.92rem;
      font-weight: 700;
      border: 1px solid transparent;
      white-space: nowrap;
    }

    .desktop-nav a:hover,
    .desktop-nav a.active {
      color: var(--text);
      background: rgba(0, 240, 255, 0.1);
      border-color: rgba(0, 240, 255, 0.3);
    }

    .nav-actions {
      display: flex;
      align-items: center;
      gap: 8px;
      flex: 0 0 auto;
    }

    .login-link {
      color: var(--soft);
      padding: 10px 8px;
      font-weight: 800;
      font-size: 0.92rem;
    }

    .login-link:hover {
      color: var(--cyan);
    }

    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 9px;
      min-height: 44px;
      padding: 12px 18px;
      border-radius: 999px;
      border: 1px solid transparent;
      font-weight: 850;
      line-height: 1.1;
      transition: transform .18s ease, box-shadow .18s ease, background .18s ease, border-color .18s ease, color .18s ease;
    }

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

    .btn:active {
      transform: translateY(1px) scale(0.98);
    }

    .btn:focus-visible,
    a:focus-visible,
    input:focus-visible,
    textarea:focus-visible {
      outline: 3px solid rgba(204, 255, 0, 0.55);
      outline-offset: 3px;
    }

    .btn-primary {
      color: #06111e;
      background: linear-gradient(135deg, var(--lime), var(--cyan));
      box-shadow: 0 12px 30px rgba(0, 240, 255, 0.25);
    }

    .btn-primary:hover {
      box-shadow: 0 16px 38px rgba(204, 255, 0, 0.28);
    }

    .btn-secondary {
      color: var(--text);
      border-color: rgba(0, 240, 255, 0.42);
      background: rgba(0, 240, 255, 0.08);
    }

    .btn-secondary:hover {
      border-color: var(--cyan);
      box-shadow: var(--glow);
    }

    .btn-ghost {
      color: var(--soft);
      border-color: rgba(255, 255, 255, 0.14);
      background: rgba(255, 255, 255, 0.04);
    }

    .mobile-menu-toggle {
      display: none;
      width: 44px;
      height: 44px;
      border-radius: 12px;
      border: 1px solid var(--line);
      background: rgba(0, 240, 255, 0.08);
      color: var(--text);
    }

    .mobile-nav {
      display: none;
      border-top: 1px solid var(--line);
      padding: 10px 0 16px;
    }

    .mobile-nav a {
      display: block;
      padding: 11px 14px;
      border-radius: 12px;
      color: var(--soft);
      font-weight: 750;
    }

    .mobile-nav a.active,
    .mobile-nav a:hover {
      background: rgba(0, 240, 255, 0.09);
      color: var(--text);
    }

    .hero {
      position: relative;
      min-height: 640px;
      display: flex;
      align-items: center;
      overflow: hidden;
      background:
        linear-gradient(90deg, rgba(5, 10, 23, 0.92), rgba(8, 19, 39, 0.78), rgba(8, 19, 39, 0.45)),
        url("/assets/images/backpic/back-1.jpg") center/cover no-repeat;
    }

    .hero::after {
      content: "";
      position: absolute;
      inset: auto 0 0;
      height: 180px;
      background: linear-gradient(to bottom, transparent, var(--bg-deep));
      pointer-events: none;
    }

    .hero-inner {
      position: relative;
      z-index: 2;
      padding: 94px 0 78px;
    }

    .hero-stage {
      display: grid;
      grid-template-columns: minmax(0, 1.1fr) minmax(320px, 0.8fr);
      gap: 34px;
      align-items: stretch;
    }

    .hero-copy {
      max-width: 780px;
      padding: 34px 0;
    }

    .eyebrow-row {
      display: flex;
      flex-wrap: wrap;
      gap: 10px;
      margin-bottom: 20px;
    }

    .badge {
      display: inline-flex;
      align-items: center;
      gap: 7px;
      min-height: 32px;
      padding: 7px 11px;
      border-radius: 999px;
      color: var(--soft);
      background: rgba(0, 240, 255, 0.09);
      border: 1px solid rgba(0, 240, 255, 0.28);
      font-size: 0.83rem;
      font-weight: 800;
    }

    .badge.lime {
      color: #efffd1;
      background: rgba(204, 255, 0, 0.08);
      border-color: rgba(204, 255, 0, 0.34);
    }

    h1,
    h2,
    h3 {
      margin: 0;
      letter-spacing: 0;
      line-height: 1.12;
    }

    h1 {
      font-size: clamp(2.35rem, 5.4vw, 5.55rem);
      font-weight: 920;
      max-width: 940px;
      text-wrap: balance;
    }

    .hero-lead {
      max-width: 740px;
      margin: 22px 0 0;
      color: var(--soft);
      font-size: clamp(1.02rem, 1.7vw, 1.22rem);
      line-height: 1.66;
    }

    .hero-actions {
      display: flex;
      flex-wrap: wrap;
      gap: 13px;
      margin-top: 30px;
    }

    .hero-data {
      display: grid;
      grid-template-columns: repeat(3, minmax(0, 1fr));
      gap: 12px;
      margin-top: 30px;
      max-width: 720px;
    }

    .metric {
      padding: 16px;
      border-left: 2px solid var(--cyan);
      background: linear-gradient(90deg, rgba(0, 240, 255, 0.1), rgba(0, 240, 255, 0.02));
    }

    .metric strong {
      display: block;
      font-size: 1.45rem;
      color: var(--lime);
      line-height: 1;
      margin-bottom: 7px;
    }

    .metric span {
      color: var(--muted);
      font-size: 0.9rem;
      font-weight: 650;
    }

    .trial-panel {
      align-self: center;
      padding: 20px;
      border: 1px solid rgba(0, 240, 255, 0.28);
      background: rgba(2, 12, 28, 0.72);
      box-shadow: var(--shadow), var(--glow);
      clip-path: polygon(0 0, calc(100% - 22px) 0, 100% 22px, 100% 100%, 22px 100%, 0 calc(100% - 22px));
    }

    .trial-panel img {
      width: 100%;
      aspect-ratio: 4 / 3;
      object-fit: cover;
      border-radius: 12px;
      border: 1px solid rgba(204, 255, 0, 0.24);
      margin-bottom: 18px;
    }

    .trial-panel h2 {
      font-size: 1.35rem;
      margin-bottom: 10px;
    }

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

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

    .panel-checks li {
      display: flex;
      gap: 10px;
      align-items: flex-start;
      color: var(--soft);
      font-weight: 700;
      font-size: 0.94rem;
    }

    .panel-checks i {
      color: var(--lime);
      margin-top: 4px;
    }

    main {
      position: relative;
      z-index: 1;
    }

    .section {
      padding: 78px 0;
    }

    .section.compact {
      padding: 58px 0;
    }

    .section-header {
      max-width: 760px;
      margin-bottom: 34px;
    }

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

    .section-kicker {
      display: inline-flex;
      color: var(--lime);
      font-weight: 850;
      font-size: 0.86rem;
      margin-bottom: 11px;
    }

    .section h2 {
      font-size: clamp(1.78rem, 3vw, 3rem);
      font-weight: 900;
      margin-bottom: 13px;
    }

    .section-header p,
    .text-muted {
      color: var(--muted);
      margin: 0;
    }

    .benefit-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 20px;
      align-items: stretch;
    }

    .feature-card {
      position: relative;
      padding: 24px;
      border: 1px solid var(--line);
      background: linear-gradient(155deg, rgba(16, 28, 52, 0.9), rgba(7, 17, 34, 0.72));
      border-radius: var(--radius-md);
      overflow: hidden;
      min-height: 188px;
      transition: transform .2s ease, border-color .2s ease, box-shadow .2s ease;
    }

    .feature-card:hover {
      transform: translateY(-5px) scale(1.01);
      border-color: rgba(204, 255, 0, 0.42);
      box-shadow: 0 0 26px rgba(0, 240, 255, 0.18);
    }

    .feature-card.wide {
      grid-column: span 2;
      display: grid;
      grid-template-columns: 1.15fr 0.85fr;
      gap: 22px;
      align-items: center;
    }

    .feature-card img {
      width: 100%;
      height: 230px;
      object-fit: cover;
      border-radius: 12px;
      border: 1px solid rgba(255,255,255,0.1);
    }

    .card-icon {
      width: 46px;
      height: 46px;
      display: grid;
      place-items: center;
      color: #06111e;
      background: linear-gradient(135deg, var(--cyan), var(--lime));
      border-radius: 13px;
      margin-bottom: 18px;
      box-shadow: 0 0 18px rgba(0, 240, 255, 0.28);
    }

    .feature-card h3 {
      font-size: 1.22rem;
      margin-bottom: 10px;
    }

    .feature-card p {
      color: var(--muted);
      margin: 0;
    }

    .qualification-layout {
      display: grid;
      grid-template-columns: minmax(0, 0.92fr) minmax(0, 1.08fr);
      gap: 34px;
      align-items: start;
    }

    .qualification-aside {
      padding: 28px;
      border-radius: var(--radius-lg);
      background: linear-gradient(150deg, rgba(204, 255, 0, 0.1), rgba(0, 240, 255, 0.06));
      border: 1px solid var(--line-strong);
      box-shadow: var(--shadow);
    }

    .qualification-aside h3 {
      font-size: 1.55rem;
      margin-bottom: 12px;
    }

    .qualification-aside p {
      color: var(--soft);
      margin-bottom: 22px;
    }

    .steps {
      display: grid;
      gap: 14px;
    }

    .step {
      display: grid;
      grid-template-columns: 44px 1fr;
      gap: 14px;
      align-items: start;
      padding: 16px 0;
      border-bottom: 1px solid rgba(255,255,255,0.09);
    }

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

    .step-num {
      width: 44px;
      height: 44px;
      border-radius: 50%;
      display: grid;
      place-items: center;
      color: #071326;
      background: var(--lime);
      font-weight: 900;
    }

    .step h3 {
      font-size: 1.08rem;
      margin-bottom: 5px;
    }

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

    .topic-strip {
      border-top: 1px solid var(--line);
      border-bottom: 1px solid var(--line);
      background: rgba(0, 240, 255, 0.035);
    }

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

    .topic-card {
      min-height: 310px;
      border-radius: var(--radius-md);
      overflow: hidden;
      border: 1px solid rgba(0, 240, 255, 0.22);
      background: var(--panel-solid);
      transition: transform .2s ease, box-shadow .2s ease, border-color .2s ease;
    }

    .topic-card:hover {
      transform: translateY(-6px);
      border-color: var(--cyan);
      box-shadow: 0 0 28px rgba(0, 240, 255, 0.22);
    }

    .topic-card img {
      height: 150px;
      width: 100%;
      object-fit: cover;
    }

    .topic-body {
      padding: 20px;
    }

    .topic-body h3 {
      font-size: 1.18rem;
      margin-bottom: 9px;
    }

    .topic-body p {
      color: var(--muted);
      margin: 0 0 16px;
    }

    .inline-link {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      color: var(--lime);
      font-weight: 850;
    }

    .inline-link:hover {
      color: var(--cyan);
    }

    .news-wrap {
      display: grid;
      grid-template-columns: minmax(0, 1fr) 340px;
      gap: 28px;
      align-items: start;
    }

    .news-list {
      border: 1px solid var(--line);
      border-radius: var(--radius-lg);
      background: rgba(7, 19, 38, 0.66);
      overflow: hidden;
    }

    .news-item {
      display: grid;
      grid-template-columns: 1fr auto;
      gap: 16px;
      padding: 20px 22px;
      border-bottom: 1px solid rgba(255,255,255,0.08);
    }

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

    .news-item:hover {
      background: rgba(0, 240, 255, 0.055);
    }

    .news-title {
      font-size: 1.04rem;
      font-weight: 850;
      margin-bottom: 6px;
    }

    .news-summary {
      color: var(--muted);
      margin: 0;
      font-size: 0.94rem;
    }

    .news-meta {
      display: flex;
      flex-direction: column;
      align-items: flex-end;
      gap: 7px;
      color: var(--muted);
      font-size: 0.84rem;
      white-space: nowrap;
    }

    .empty-news {
      padding: 24px;
      color: var(--muted);
    }

    .side-recommend {
      padding: 24px;
      border-radius: var(--radius-lg);
      background:
        linear-gradient(180deg, rgba(0, 240, 255, 0.11), rgba(204, 255, 0, 0.06)),
        var(--panel-solid);
      border: 1px solid var(--line);
      position: sticky;
      top: 98px;
    }

    .side-recommend h3 {
      font-size: 1.24rem;
      margin-bottom: 14px;
    }

    .mini-list {
      display: grid;
      gap: 12px;
      margin: 18px 0 0;
      padding: 0;
      list-style: none;
    }

    .mini-list li {
      display: flex;
      gap: 10px;
      color: var(--soft);
      font-weight: 700;
    }

    .mini-list i {
      color: var(--cyan);
      margin-top: 5px;
    }

    .guide-layout {
      display: grid;
      grid-template-columns: minmax(0, 0.9fr) minmax(0, 1.1fr);
      gap: 30px;
      align-items: center;
    }

    .guide-image {
      position: relative;
      border-radius: var(--radius-lg);
      overflow: hidden;
      border: 1px solid var(--line);
      box-shadow: var(--shadow);
    }

    .guide-image img {
      height: 460px;
      width: 100%;
      object-fit: cover;
    }

    .guide-image::after {
      content: "";
      position: absolute;
      inset: 0;
      background: linear-gradient(to top, rgba(7, 19, 38, 0.72), transparent 62%);
    }

    .check-list {
      margin: 0;
      padding: 0;
      list-style: none;
      display: grid;
      gap: 14px;
    }

    .check-list li {
      display: grid;
      grid-template-columns: 34px 1fr;
      gap: 12px;
      align-items: start;
      padding: 16px;
      border: 1px solid rgba(255,255,255,0.09);
      background: rgba(255,255,255,0.035);
      border-radius: var(--radius-sm);
    }

    .check-list i {
      color: var(--lime);
      margin-top: 4px;
    }

    .hot-list {
      display: grid;
      grid-template-columns: repeat(4, minmax(230px, 1fr));
      gap: 16px;
      overflow-x: auto;
      padding-bottom: 12px;
      scrollbar-color: var(--cyan) rgba(255,255,255,0.08);
    }

    .hot-card {
      min-width: 230px;
      border: 1px solid var(--line);
      background: rgba(16, 28, 52, 0.86);
      border-radius: var(--radius-md);
      padding: 18px;
      transition: transform .2s ease, border-color .2s ease;
    }

    .hot-card:hover {
      transform: translateY(-5px);
      border-color: var(--lime);
    }

    .hot-num {
      color: var(--cyan);
      font-size: 1.65rem;
      font-weight: 930;
      margin-bottom: 12px;
    }

    .hot-card h3 {
      font-size: 1.1rem;
      margin-bottom: 8px;
    }

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

    .proof-bar {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 1px;
      border: 1px solid var(--line);
      border-radius: var(--radius-lg);
      overflow: hidden;
      background: var(--line);
    }

    .proof-item {
      padding: 22px;
      background: rgba(7, 19, 38, 0.9);
    }

    .proof-item i {
      color: var(--lime);
      font-size: 1.3rem;
      margin-bottom: 12px;
    }

    .proof-item strong {
      display: block;
      font-size: 1.05rem;
      margin-bottom: 6px;
    }

    .proof-item span {
      color: var(--muted);
      font-size: 0.92rem;
    }

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

    .rating-box {
      padding: 28px;
      border-radius: var(--radius-lg);
      background: linear-gradient(150deg, rgba(204, 255, 0, 0.12), rgba(0, 240, 255, 0.08));
      border: 1px solid var(--line-strong);
    }

    .rating-score {
      font-size: 4.4rem;
      font-weight: 950;
      color: var(--lime);
      line-height: 1;
      margin-bottom: 10px;
    }

    .stars {
      color: #ffd84a;
      letter-spacing: 0;
      margin-bottom: 12px;
    }

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

    .review-card {
      padding: 22px;
      border-radius: var(--radius-md);
      background: rgba(255,255,255,0.045);
      border: 1px solid rgba(255,255,255,0.1);
    }

    .review-card p {
      margin: 0 0 14px;
      color: var(--soft);
    }

    .review-card strong {
      display: block;
      color: var(--cyan);
    }

    .application {
      background:
        linear-gradient(135deg, rgba(0, 240, 255, 0.1), rgba(204, 255, 0, 0.05)),
        rgba(5, 12, 27, 0.72);
      border-top: 1px solid var(--line);
      border-bottom: 1px solid var(--line);
    }

    .form-layout {
      display: grid;
      grid-template-columns: minmax(0, 0.9fr) minmax(0, 1.1fr);
      gap: 34px;
      align-items: start;
    }

    .form-panel {
      padding: 26px;
      border-radius: var(--radius-lg);
      border: 1px solid var(--line);
      background: rgba(7, 19, 38, 0.82);
      box-shadow: var(--shadow);
    }

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

    .field {
      display: grid;
      gap: 7px;
      margin-bottom: 14px;
    }

    .field.full {
      grid-column: span 2;
    }

    .field label {
      color: var(--soft);
      font-size: 0.9rem;
      font-weight: 800;
    }

    .field input,
    .field textarea {
      width: 100%;
      color: var(--text);
      border: 1px solid rgba(0, 240, 255, 0.24);
      border-radius: 12px;
      background: rgba(2, 12, 28, 0.74);
      padding: 13px 14px;
      min-height: 48px;
      box-shadow: none;
      margin: 0;
    }

    .field textarea {
      min-height: 118px;
      resize: vertical;
    }

    .field input::placeholder,
    .field textarea::placeholder {
      color: rgba(215, 239, 244, 0.45);
    }

    .field input:focus,
    .field textarea:focus {
      border-color: var(--cyan);
      background: rgba(2, 12, 28, 0.92);
      box-shadow: 0 0 0 4px rgba(0, 240, 255, 0.12);
    }

    .faq-list {
      display: grid;
      gap: 12px;
      max-width: 950px;
    }

    .faq-item {
      border: 1px solid var(--line);
      border-radius: var(--radius-md);
      background: rgba(255,255,255,0.035);
      overflow: hidden;
    }

    .faq-item summary {
      padding: 18px 20px;
      cursor: pointer;
      font-weight: 850;
      color: var(--text);
      list-style: none;
      display: flex;
      justify-content: space-between;
      gap: 20px;
    }

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

    .faq-item summary::after {
      content: "+";
      color: var(--lime);
      font-size: 1.4rem;
      line-height: 1;
    }

    .faq-item[open] summary::after {
      content: "-";
    }

    .faq-item p {
      margin: 0;
      padding: 0 20px 20px;
      color: var(--muted);
    }

    .footer-cta {
      text-align: center;
      padding: 62px 0;
      background:
        linear-gradient(90deg, rgba(0, 240, 255, 0.11), rgba(204, 255, 0, 0.09)),
        rgba(7, 19, 38, 0.86);
      border-top: 1px solid var(--line);
    }

    .footer-cta h2 {
      font-size: clamp(1.75rem, 3vw, 3.15rem);
      margin-bottom: 14px;
    }

    .footer-cta p {
      max-width: 720px;
      margin: 0 auto 24px;
      color: var(--soft);
    }

    .site-footer {
      background: #050b17;
      border-top: 1px solid rgba(0, 240, 255, 0.16);
      padding: 46px 0 24px;
    }

    .footer-grid {
      display: grid;
      grid-template-columns: 1.35fr repeat(3, 1fr);
      gap: 28px;
      margin-bottom: 34px;
    }

    .footer-title {
      font-weight: 900;
      margin-bottom: 12px;
    }

    .footer-text {
      color: var(--muted);
      margin: 0;
    }

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

    .footer-links a {
      color: var(--muted);
      font-weight: 650;
    }

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

    .trust-badges {
      display: flex;
      flex-wrap: wrap;
      gap: 8px;
      margin-top: 16px;
    }

    .trust-badges span {
      padding: 7px 10px;
      border-radius: 999px;
      color: var(--soft);
      border: 1px solid rgba(255,255,255,0.12);
      background: rgba(255,255,255,0.04);
      font-size: 0.82rem;
      font-weight: 800;
    }

    .copyright {
      padding-top: 22px;
      border-top: 1px solid rgba(255,255,255,0.08);
      color: var(--muted);
      font-size: 0.9rem;
      display: flex;
      justify-content: space-between;
      gap: 16px;
      flex-wrap: wrap;
    }

    .fab {
      position: fixed;
      left: 1rem;
      bottom: 6rem;
      z-index: 50;
      min-width: 64px;
      height: 56px;
      padding: 0 16px;
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 8px;
      color: var(--text);
      border: 1px solid transparent;
      border-radius: 999px;
      background:
        linear-gradient(#06111e, #06111e) padding-box,
        linear-gradient(135deg, var(--lime), var(--cyan), var(--pink)) border-box;
      box-shadow: 0 0 18px rgba(0, 240, 255, 0.5);
      opacity: .66;
      backdrop-filter: blur(14px);
      animation: fabFloat 3.3s ease-in-out infinite;
    }

    .fab::after {
      content: "";
      position: absolute;
      right: 5px;
      top: 5px;
      width: 10px;
      height: 10px;
      border-radius: 50%;
      background: var(--lime);
      box-shadow: 0 0 12px var(--lime);
      animation: blink 1.4s infinite;
    }

    .fab:hover {
      opacity: 1;
      transform: translateY(-3px) scale(1.08);
      box-shadow: 0 0 34px rgba(0, 240, 255, 0.66);
    }

    .fab:hover i {
      animation: flicker .58s linear;
    }

    .fab:active {
      transform: scale(.95);
      background:
        linear-gradient(#071326, #071326) padding-box,
        linear-gradient(135deg, var(--cyan), var(--pink)) border-box;
    }

    @keyframes fabFloat {
      0%, 100% { transform: translateY(0); }
      50% { transform: translateY(-7px); }
    }

    @keyframes blink {
      0%, 100% { opacity: 1; }
      50% { opacity: .25; }
    }

    @keyframes flicker {
      0%, 20%, 45%, 70%, 100% { opacity: 1; }
      10%, 35%, 60% { opacity: .35; }
    }

    @media (max-width: 1024px) {
      .desktop-nav {
        display: none;
      }

      .mobile-menu-toggle {
        display: inline-grid;
        place-items: center;
      }

      .mobile-nav.is-open {
        display: grid;
      }

      .brand-name {
        max-width: 280px;
      }

      .hero-stage,
      .qualification-layout,
      .guide-layout,
      .news-wrap,
      .form-layout,
      .review-layout {
        grid-template-columns: 1fr;
      }

      .side-recommend {
        position: static;
      }

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

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

    @media (max-width: 768px) {
      .nav-shell {
        min-height: 68px;
        gap: 10px;
      }

      .brand {
        min-width: 0;
      }

      .brand-name {
        font-size: 0.86rem;
        max-width: 190px;
      }

      .brand-name span {
        display: none;
      }

      .nav-actions {
        gap: 6px;
      }

      .login-link {
        padding: 9px 4px;
        font-size: 0.84rem;
      }

      .nav-actions .btn {
        padding: 10px 12px;
        min-height: 40px;
        font-size: 0.86rem;
      }

      .hero {
        min-height: auto;
      }

      .hero-inner {
        padding: 58px 0 44px;
      }

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

      .hero-data,
      .benefit-grid,
      .topic-grid,
      .proof-bar,
      .review-list,
      .form-grid {
        grid-template-columns: 1fr;
      }

      .feature-card.wide {
        grid-column: auto;
        grid-template-columns: 1fr;
      }

      .section {
        padding: 56px 0;
      }

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

      .news-meta {
        align-items: flex-start;
        flex-direction: row;
        flex-wrap: wrap;
      }

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

      .copyright {
        display: block;
      }

      .copyright span {
        display: block;
        margin-bottom: 8px;
      }
    }

    @media (max-width: 520px) {
      .container {
        width: min(100% - 24px, var(--container));
      }

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

      .brand-name {
        max-width: 150px;
        font-size: 0.78rem;
      }

      .mobile-menu-toggle {
        width: 40px;
        height: 40px;
      }

      .login-link {
        display: inline-flex;
        min-height: 40px;
        align-items: center;
      }

      .nav-actions .btn {
        max-width: 104px;
        white-space: normal;
        text-align: center;
        line-height: 1.08;
      }

      .hero-actions {
        display: grid;
      }

      .btn {
        width: 100%;
      }

      .trial-panel {
        clip-path: none;
        border-radius: var(--radius-md);
      }

      .field.full {
        grid-column: auto;
      }

      .fab {
        min-width: 54px;
        height: 52px;
        padding: 0 12px;
        bottom: 5.5rem;
      }

      .fab span {
        display: none;
      }
    }

/* roulang page: article */
:root {
      --bg: #0f0c20;
      --bg-deep: #071326;
      --panel: rgba(17, 29, 54, .78);
      --panel-solid: #101c34;
      --panel-soft: rgba(13, 39, 63, .74);
      --text: #fff;
      --muted: #a6acaf;
      --soft: #d7eff4;
      --cyan: #00f0ff;
      --lime: #ccff00;
      --blue: #2c63ff;
      --pink: #ff3ab5;
      --line: rgba(0, 240, 255, .22);
      --line-strong: rgba(204, 255, 0, .42);
      --shadow: 0 22px 70px rgba(0, 0, 0, .45);
      --glow: 0 0 24px rgba(0, 240, 255, .26);
      --radius-sm: 8px;
      --radius-md: 14px;
      --radius-lg: 22px;
      --container: 1180px;
      --font: "Inter", "Segoe UI", Roboto, Arial, sans-serif;
    }

    * { box-sizing: border-box; }
    html { scroll-behavior: smooth; }
    body {
      margin: 0;
      color: var(--text);
      font-family: var(--font);
      line-height: 1.62;
      background:
        radial-gradient(circle at 14% 0%, rgba(0,240,255,.18), transparent 32%),
        radial-gradient(circle at 90% 20%, rgba(204,255,0,.11), transparent 30%),
        linear-gradient(145deg, var(--bg), var(--bg-deep) 58%, #06101f);
      overflow-x: hidden;
    }
    body::before {
      content: "";
      position: fixed;
      inset: 0;
      z-index: -2;
      pointer-events: none;
      background-image:
        linear-gradient(rgba(255,255,255,.035) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255,255,255,.03) 1px, transparent 1px);
      background-size: 42px 42px;
      mask-image: linear-gradient(to bottom, rgba(0,0,0,.75), transparent 82%);
    }
    a {
      color: inherit;
      text-decoration: none;
      transition: color .2s ease, border-color .2s ease, transform .2s ease, background .2s ease;
    }
    img { display: block; max-width: 100%; height: auto; }
    button, input, textarea { font: inherit; }
    button { cursor: pointer; }
    .container {
      width: min(var(--container), calc(100% - 32px));
      margin: 0 auto;
    }

    .site-header {
      position: sticky;
      top: 0;
      z-index: 100;
      border-bottom: 1px solid rgba(0,240,255,.2);
      background: rgba(7,13,28,.88);
      backdrop-filter: blur(18px);
      box-shadow: 0 12px 34px rgba(0,0,0,.28);
    }
    .nav-shell {
      min-height: 76px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 18px;
    }
    .brand {
      display: flex;
      align-items: center;
      gap: 12px;
      min-width: 210px;
    }
    .brand-mark {
      width: 44px;
      height: 44px;
      display: grid;
      place-items: center;
      flex: 0 0 auto;
      color: #05111e;
      border-radius: 14px;
      background: linear-gradient(135deg, var(--lime), var(--cyan));
      box-shadow: 0 0 26px rgba(0,240,255,.35);
    }
    .brand-name {
      max-width: 330px;
      font-size: .98rem;
      font-weight: 800;
      line-height: 1.15;
    }
    .brand-name span {
      display: block;
      margin-top: 3px;
      color: var(--muted);
      font-size: .77rem;
      font-weight: 600;
    }
    .desktop-nav {
      display: flex;
      align-items: center;
      gap: 6px;
      margin-left: auto;
    }
    .desktop-nav a {
      padding: 10px 12px;
      color: var(--soft);
      border: 1px solid transparent;
      border-radius: 999px;
      font-size: .92rem;
      font-weight: 700;
      white-space: nowrap;
    }
    .desktop-nav a:hover,
    .desktop-nav a.active {
      color: var(--text);
      border-color: rgba(0,240,255,.3);
      background: rgba(0,240,255,.1);
    }
    .nav-actions {
      display: flex;
      align-items: center;
      gap: 8px;
      flex: 0 0 auto;
    }
    .login-link {
      padding: 10px 8px;
      color: var(--soft);
      font-size: .9rem;
      font-weight: 750;
    }
    .login-link:hover { color: var(--lime); }
    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 9px;
      min-height: 44px;
      padding: 12px 18px;
      border: 1px solid transparent;
      border-radius: 999px;
      font-weight: 850;
      line-height: 1.1;
      transition: transform .18s ease, box-shadow .18s ease, background .18s ease, border-color .18s ease;
    }
    .btn:hover { transform: translateY(-2px); }
    .btn:active { transform: translateY(1px) scale(.98); }
    .btn:focus-visible,
    a:focus-visible,
    button:focus-visible,
    input:focus-visible,
    textarea:focus-visible {
      outline: 3px solid rgba(204,255,0,.55);
      outline-offset: 3px;
    }
    .btn-primary {
      color: #06111e;
      background: linear-gradient(135deg, var(--lime), var(--cyan));
      box-shadow: 0 12px 30px rgba(0,240,255,.25);
    }
    .btn-primary:hover { box-shadow: 0 16px 38px rgba(204,255,0,.28); }
    .btn-secondary {
      color: var(--text);
      border-color: rgba(0,240,255,.42);
      background: rgba(0,240,255,.08);
    }
    .btn-secondary:hover { border-color: var(--cyan); box-shadow: var(--glow); }
    .btn-ghost {
      color: var(--soft);
      border-color: rgba(255,255,255,.14);
      background: rgba(255,255,255,.04);
    }
    .mobile-menu-toggle {
      display: none;
      width: 44px;
      height: 44px;
      color: var(--text);
      border: 1px solid var(--line);
      border-radius: 12px;
      background: rgba(0,240,255,.08);
    }
    .mobile-nav {
      display: none;
      padding: 10px 0 16px;
      border-top: 1px solid var(--line);
    }
    .mobile-nav a {
      display: block;
      padding: 11px 14px;
      color: var(--soft);
      border-radius: 12px;
      font-weight: 750;
    }
    .mobile-nav a:hover,
    .mobile-nav a.active {
      color: var(--text);
      background: rgba(0,240,255,.09);
    }

    .article-hero {
      position: relative;
      min-height: 430px;
      display: flex;
      align-items: center;
      overflow: hidden;
      background:
        linear-gradient(90deg, rgba(5,10,23,.94), rgba(8,19,39,.82), rgba(8,19,39,.48)),
        url("/assets/images/backpic/back-2.jpg") center/cover no-repeat;
    }
    .article-hero::after {
      content: "";
      position: absolute;
      right: -140px;
      top: -180px;
      width: 520px;
      height: 520px;
      border: 1px solid rgba(0,240,255,.2);
      border-radius: 50%;
      box-shadow: 0 0 0 32px rgba(0,240,255,.025), 0 0 0 64px rgba(204,255,0,.025);
    }
    .article-hero-inner {
      position: relative;
      z-index: 2;
      width: 100%;
      padding: 76px 0 70px;
    }
    .eyebrow {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      margin-bottom: 20px;
      color: var(--lime);
      font-size: .76rem;
      font-weight: 850;
      letter-spacing: .12em;
      text-transform: uppercase;
    }
    .eyebrow::before {
      content: "";
      width: 28px;
      height: 2px;
      background: var(--cyan);
      box-shadow: 0 0 12px var(--cyan);
    }
    h1, h2, h3, p { margin-top: 0; }
    h1 {
      max-width: 820px;
      margin-bottom: 20px;
      font-size: clamp(2.2rem, 5vw, 4.6rem);
      line-height: 1.06;
      letter-spacing: -.045em;
      font-weight: 900;
    }
    .hero-summary {
      max-width: 730px;
      margin-bottom: 28px;
      color: var(--soft);
      font-size: clamp(1rem, 1.8vw, 1.18rem);
    }
    .hero-meta {
      display: flex;
      flex-wrap: wrap;
      align-items: center;
      gap: 10px 18px;
      color: var(--muted);
      font-size: .88rem;
    }
    .meta-item {
      display: inline-flex;
      align-items: center;
      gap: 7px;
    }
    .meta-item i { color: var(--cyan); }

    .article-layout {
      display: grid;
      grid-template-columns: minmax(0, 1fr) 330px;
      gap: 48px;
      align-items: start;
      padding: 72px 0 86px;
    }
    .article-main { min-width: 0; }
    .article-intro {
      padding-bottom: 28px;
      margin-bottom: 32px;
      border-bottom: 1px solid var(--line);
    }
    .article-intro h2 {
      margin-bottom: 12px;
      color: var(--text);
      font-size: clamp(1.55rem, 3vw, 2.15rem);
      line-height: 1.2;
    }
    .article-intro p {
      max-width: 760px;
      margin-bottom: 0;
      color: var(--soft);
      font-size: 1.05rem;
    }
    .article-body {
      color: #dce8ec;
      font-size: 1.04rem;
    }
    .article-body h2,
    .article-body h3 {
      margin: 34px 0 12px;
      color: var(--text);
      line-height: 1.25;
      letter-spacing: -.02em;
    }
    .article-body h2 { font-size: 1.8rem; }
    .article-body h3 { font-size: 1.35rem; }
    .article-body p { margin-bottom: 18px; }
    .article-body a {
      color: var(--cyan);
      text-decoration: underline;
      text-decoration-color: rgba(0,240,255,.45);
      text-underline-offset: 3px;
    }
    .article-body a:hover { color: var(--lime); }
    .article-body ul,
    .article-body ol {
      margin: 16px 0 24px 22px;
      color: var(--soft);
    }
    .article-body li { margin-bottom: 9px; }
    .article-body blockquote {
      margin: 28px 0;
      padding: 20px 24px;
      border-left: 3px solid var(--lime);
      color: var(--soft);
      background: rgba(0,240,255,.06);
    }
    .article-body img {
      width: 100%;
      margin: 24px 0;
      border: 1px solid var(--line);
      border-radius: var(--radius-md);
    }

    .article-aside {
      position: sticky;
      top: 102px;
      display: grid;
      gap: 18px;
    }
    .aside-panel {
      padding: 24px;
      border: 1px solid var(--line);
      border-radius: var(--radius-lg);
      background: linear-gradient(145deg, rgba(17,29,54,.92), rgba(8,26,48,.78));
      box-shadow: var(--shadow);
    }
    .aside-panel.highlight {
      border-color: rgba(204,255,0,.4);
      background:
        radial-gradient(circle at 85% 12%, rgba(204,255,0,.16), transparent 32%),
        linear-gradient(145deg, rgba(17,29,54,.96), rgba(8,26,48,.82));
    }
    .aside-panel h3 {
      margin-bottom: 18px;
      color: var(--text);
      font-size: 1.15rem;
      line-height: 1.25;
    }
    .aside-panel p {
      margin-bottom: 18px;
      color: var(--muted);
      font-size: .92rem;
    }
    .progress-wrap {
      display: grid;
      grid-template-columns: 106px 1fr;
      gap: 18px;
      align-items: center;
      margin-bottom: 20px;
    }
    .progress-ring {
      width: 106px;
      height: 106px;
      display: grid;
      place-items: center;
      border-radius: 50%;
      background: conic-gradient(var(--lime) 0 72%, rgba(255,255,255,.1) 72% 100%);
      box-shadow: 0 0 24px rgba(204,255,0,.2);
    }
    .progress-ring::before {
      content: "72%";
      width: 78px;
      height: 78px;
      display: grid;
      place-items: center;
      color: var(--text);
      border-radius: 50%;
      background: #101c34;
      font-size: 1.2rem;
      font-weight: 900;
    }
    .progress-copy strong {
      display: block;
      margin-bottom: 5px;
      color: var(--lime);
      font-size: 1.25rem;
    }
    .progress-copy span {
      display: block;
      color: var(--muted);
      font-size: .8rem;
    }
    .tier-list {
      display: grid;
      gap: 9px;
      margin: 0 0 20px;
      padding: 0;
      list-style: none;
    }
    .tier-list li {
      display: flex;
      justify-content: space-between;
      gap: 12px;
      padding: 10px 0;
      color: var(--soft);
      border-bottom: 1px solid rgba(255,255,255,.08);
      font-size: .88rem;
    }
    .tier-list li:last-child { border-bottom: 0; }
    .tier-list b { color: var(--cyan); }
    .full-btn { width: 100%; }

    .benefit-strip {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 12px;
      margin: 0 0 34px;
    }
    .benefit-item {
      padding: 18px;
      border-top: 2px solid var(--cyan);
      background: rgba(255,255,255,.035);
    }
    .benefit-item i {
      display: block;
      margin-bottom: 10px;
      color: var(--lime);
      font-size: 1.25rem;
    }
    .benefit-item strong {
      display: block;
      margin-bottom: 4px;
      font-size: .95rem;
    }
    .benefit-item span {
      color: var(--muted);
      font-size: .82rem;
      line-height: 1.45;
    }

    .related-section {
      padding: 72px 0;
      border-top: 1px solid rgba(0,240,255,.13);
      background: rgba(3,13,28,.42);
    }
    .section-heading {
      display: flex;
      align-items: end;
      justify-content: space-between;
      gap: 20px;
      margin-bottom: 28px;
    }
    .section-heading h2 {
      margin-bottom: 0;
      font-size: clamp(1.7rem, 3vw, 2.5rem);
      line-height: 1.15;
      letter-spacing: -.035em;
    }
    .section-heading p {
      max-width: 430px;
      margin-bottom: 0;
      color: var(--muted);
      font-size: .94rem;
    }
    .related-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 20px;
    }
    .related-card {
      overflow: hidden;
      border: 1px solid var(--line);
      border-radius: var(--radius-lg);
      background: rgba(17,29,54,.7);
      transition: transform .25s ease, border-color .25s ease, box-shadow .25s ease;
    }
    .related-card:hover {
      transform: translateY(-6px);
      border-color: var(--cyan);
      box-shadow: var(--glow);
    }
    .related-card figure {
      position: relative;
      height: 160px;
      margin: 0;
      overflow: hidden;
    }
    .related-card figure::after {
      content: "";
      position: absolute;
      inset: 0;
      background: linear-gradient(to top, rgba(8,16,32,.78), transparent 65%);
    }
    .related-card img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      transition: transform .35s ease;
    }
    .related-card:hover img { transform: scale(1.06); }
    .related-content { padding: 20px; }
    .related-content .tag {
      display: inline-block;
      margin-bottom: 10px;
      color: var(--lime);
      font-size: .72rem;
      font-weight: 850;
      letter-spacing: .08em;
      text-transform: uppercase;
    }
    .related-content h3 {
      margin-bottom: 8px;
      font-size: 1.14rem;
      line-height: 1.25;
    }
    .related-content p {
      margin-bottom: 16px;
      color: var(--muted);
      font-size: .88rem;
    }
    .inline-link {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      color: var(--cyan);
      font-size: .9rem;
      font-weight: 800;
    }
    .inline-link:hover { color: var(--lime); }
    .inline-link i { transition: transform .2s ease; }
    .inline-link:hover i { transform: translateX(4px); }

    .faq-section {
      padding: 76px 0;
    }
    .faq-list {
      max-width: 850px;
      display: grid;
      gap: 10px;
      margin: 0;
    }
    .faq-list details {
      border: 1px solid rgba(0,240,255,.18);
      border-radius: var(--radius-md);
      background: rgba(17,29,54,.58);
      transition: border-color .2s ease, background .2s ease;
    }
    .faq-list details[open] {
      border-color: rgba(204,255,0,.4);
      background: rgba(17,29,54,.85);
    }
    .faq-list summary {
      position: relative;
      padding: 18px 48px 18px 20px;
      color: var(--text);
      cursor: pointer;
      font-weight: 800;
      list-style: none;
    }
    .faq-list summary::-webkit-details-marker { display: none; }
    .faq-list summary::after {
      content: "\f107";
      position: absolute;
      right: 20px;
      color: var(--cyan);
      font-family: "Font Awesome 6 Free";
      font-weight: 900;
      transition: transform .2s ease;
    }
    .faq-list details[open] summary::after { transform: rotate(180deg); }
    .faq-list details p {
      margin: -4px 20px 20px;
      color: var(--muted);
      font-size: .94rem;
    }

    .cta-section {
      padding: 76px 0 88px;
    }
    .cta-box {
      position: relative;
      overflow: hidden;
      display: grid;
      grid-template-columns: 1fr auto;
      align-items: center;
      gap: 28px;
      padding: 40px 46px;
      border: 1px solid rgba(0,240,255,.35);
      border-radius: var(--radius-lg);
      background:
        radial-gradient(circle at 90% 10%, rgba(204,255,0,.15), transparent 30%),
        linear-gradient(110deg, rgba(15,53,80,.88), rgba(16,28,52,.94));
      box-shadow: var(--shadow);
    }
    .cta-box::before {
      content: "";
      position: absolute;
      left: -80px;
      bottom: -110px;
      width: 280px;
      height: 280px;
      border: 1px solid rgba(0,240,255,.25);
      border-radius: 50%;
    }
    .cta-box > * { position: relative; z-index: 1; }
    .cta-box h2 {
      margin-bottom: 10px;
      font-size: clamp(1.65rem, 3vw, 2.45rem);
      line-height: 1.12;
    }
    .cta-box p {
      max-width: 650px;
      margin-bottom: 0;
      color: var(--soft);
    }

    .site-footer {
      padding: 62px 0 24px;
      border-top: 1px solid rgba(0,240,255,.2);
      background: rgba(4,10,23,.78);
    }
    .footer-grid {
      display: grid;
      grid-template-columns: 1.35fr .8fr .95fr 1fr;
      gap: 34px;
      padding-bottom: 42px;
    }
    .footer-title {
      margin-bottom: 14px;
      color: var(--text);
      font-size: 1rem;
      font-weight: 850;
    }
    .footer-text {
      max-width: 320px;
      margin-bottom: 16px;
      color: var(--muted);
      font-size: .88rem;
    }
    .footer-links { display: grid; gap: 9px; }
    .footer-links a {
      color: var(--muted);
      font-size: .88rem;
    }
    .footer-links a:hover { color: var(--cyan); transform: translateX(3px); }
    .trust-badges {
      display: flex;
      flex-wrap: wrap;
      gap: 7px;
    }
    .trust-badges span {
      display: inline-flex;
      align-items: center;
      gap: 6px;
      padding: 6px 9px;
      color: var(--soft);
      border: 1px solid rgba(0,240,255,.18);
      border-radius: 7px;
      background: rgba(0,240,255,.05);
      font-size: .72rem;
      font-weight: 700;
    }
    .trust-badges i { color: var(--lime); }
    .copyright {
      display: flex;
      justify-content: space-between;
      gap: 18px;
      padding-top: 22px;
      color: #7f929b;
      border-top: 1px solid rgba(255,255,255,.08);
      font-size: .76rem;
    }
    .copyright span:last-child { color: var(--soft); }

    .floating-help {
      position: fixed;
      left: 16px;
      bottom: 96px;
      z-index: 50;
      width: 56px;
      height: 56px;
      display: grid;
      place-items: center;
      color: var(--cyan);
      border: 1px solid var(--cyan);
      border-radius: 16px;
      background: rgba(0,0,0,.62);
      box-shadow: 0 0 18px rgba(0,240,255,.52);
      opacity: .72;
      animation: breathe 3s ease-in-out infinite;
    }
    .floating-help:hover {
      color: var(--lime);
      border-color: var(--lime);
      opacity: 1;
      transform: scale(1.1);
    }
    .floating-help i { font-size: 1.3rem; }
    .floating-help::after {
      content: "MỚI";
      position: absolute;
      top: -8px;
      right: -8px;
      padding: 2px 5px;
      color: #071326;
      border-radius: 5px;
      background: var(--lime);
      font-size: .58rem;
      font-weight: 900;
      animation: blink 1.8s infinite;
    }
    @keyframes breathe {
      0%, 100% { box-shadow: 0 0 14px rgba(0,240,255,.38); }
      50% { box-shadow: 0 0 28px rgba(204,255,0,.48); }
    }
    @keyframes blink {
      0%, 60%, 100% { opacity: 1; }
      75% { opacity: .3; }
    }

    .not-found {
      padding: 44px 0 100px;
      text-align: center;
    }
    .not-found i {
      display: block;
      margin-bottom: 18px;
      color: var(--cyan);
      font-size: 3rem;
    }
    .not-found h2 { margin-bottom: 10px; }
    .not-found p { margin-bottom: 24px; color: var(--muted); }

    @media (max-width: 1024px) {
      .desktop-nav { gap: 0; }
      .desktop-nav a { padding: 9px 8px; font-size: .82rem; }
      .brand { min-width: 185px; }
      .article-layout { grid-template-columns: minmax(0, 1fr) 290px; gap: 28px; }
      .footer-grid { grid-template-columns: repeat(2, 1fr); }
    }
    @media (max-width: 768px) {
      .desktop-nav { display: none; }
      .mobile-menu-toggle { display: block; }
      .nav-actions .btn { display: inline-flex; }
      .mobile-nav.is-open { display: block; }
      .article-hero { min-height: 390px; }
      .article-hero-inner { padding: 64px 0 58px; }
      .article-layout { display: block; padding: 54px 0 64px; }
      .article-aside {
        position: static;
        grid-template-columns: repeat(2, 1fr);
        margin-top: 46px;
      }
      .benefit-strip { grid-template-columns: 1fr; }
      .related-grid { grid-template-columns: 1fr 1fr; }
      .cta-box { grid-template-columns: 1fr; padding: 32px; }
      .cta-box .btn { justify-self: start; }
    }
    @media (max-width: 520px) {
      .container { width: min(var(--container), calc(100% - 24px)); }
      .nav-shell { min-height: 68px; gap: 8px; }
      .brand { min-width: 0; gap: 8px; }
      .brand-mark { width: 38px; height: 38px; border-radius: 11px; }
      .brand-name { font-size: .78rem; max-width: 155px; }
      .brand-name span { font-size: .62rem; }
      .nav-actions { gap: 3px; }
      .login-link { display: none; }
      .nav-actions .btn {
        min-height: 38px;
        padding: 9px 11px;
        font-size: .74rem;
      }
      .mobile-menu-toggle { width: 38px; height: 38px; }
      h1 { font-size: 2.25rem; }
      .hero-meta { display: grid; gap: 7px; }
      .article-layout { padding-top: 42px; }
      .article-body { font-size: .98rem; }
      .article-aside { grid-template-columns: 1fr; }
      .related-grid { grid-template-columns: 1fr; }
      .section-heading { display: block; }
      .section-heading p { margin-top: 12px; }
      .cta-box { padding: 26px 22px; }
      .footer-grid { grid-template-columns: 1fr; gap: 26px; }
      .copyright { display: grid; gap: 8px; }
      .floating-help { left: 12px; bottom: 76px; }
    }

/* roulang page: category1 */
:root {
      --bg: #0f0c20;
      --bg-deep: #071326;
      --panel: rgba(17, 29, 54, 0.78);
      --panel-solid: #101c34;
      --panel-soft: rgba(13, 39, 63, 0.74);
      --text: #ffffff;
      --muted: #a6acaf;
      --soft: #d7eff4;
      --cyan: #00f0ff;
      --lime: #ccff00;
      --blue: #2c63ff;
      --pink: #ff3ab5;
      --line: rgba(0, 240, 255, 0.22);
      --line-strong: rgba(204, 255, 0, 0.42);
      --shadow: 0 22px 70px rgba(0, 0, 0, 0.45);
      --glow: 0 0 24px rgba(0, 240, 255, 0.26);
      --radius-sm: 8px;
      --radius-md: 14px;
      --radius-lg: 22px;
      --container: 1180px;
      --font: "Inter", "Segoe UI", Roboto, Arial, sans-serif;
    }

    * {
      box-sizing: border-box;
    }

    html {
      scroll-behavior: smooth;
    }

    body {
      margin: 0;
      overflow-x: hidden;
      color: var(--text);
      background:
        radial-gradient(circle at 16% 0%, rgba(0, 240, 255, 0.18), transparent 32%),
        radial-gradient(circle at 88% 18%, rgba(204, 255, 0, 0.12), transparent 30%),
        linear-gradient(145deg, var(--bg), var(--bg-deep) 58%, #06101f);
      font-family: var(--font);
      line-height: 1.62;
    }

    body::before {
      content: "";
      position: fixed;
      inset: 0;
      z-index: -2;
      pointer-events: none;
      background-image:
        linear-gradient(rgba(255, 255, 255, 0.035) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255, 255, 255, 0.03) 1px, transparent 1px);
      background-size: 42px 42px;
      mask-image: linear-gradient(to bottom, rgba(0,0,0,0.75), transparent 82%);
    }

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

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

    button,
    input,
    textarea {
      font: inherit;
    }

    button {
      cursor: pointer;
    }

    .container {
      width: min(var(--container), calc(100% - 32px));
      margin: 0 auto;
    }

    .site-header {
      position: sticky;
      top: 0;
      z-index: 100;
      border-bottom: 1px solid rgba(0, 240, 255, 0.2);
      background: rgba(7, 13, 28, 0.88);
      backdrop-filter: blur(18px);
      box-shadow: 0 12px 34px rgba(0, 0, 0, 0.28);
    }

    .nav-shell {
      min-height: 76px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 18px;
    }

    .brand {
      display: flex;
      align-items: center;
      gap: 12px;
      min-width: 210px;
    }

    .brand-mark {
      width: 44px;
      height: 44px;
      display: grid;
      flex: 0 0 auto;
      place-items: center;
      border-radius: 14px;
      color: #05111e;
      background: linear-gradient(135deg, var(--lime), var(--cyan));
      box-shadow: 0 0 26px rgba(0, 240, 255, 0.35);
    }

    .brand-name {
      max-width: 330px;
      font-size: .98rem;
      font-weight: 800;
      line-height: 1.15;
    }

    .brand-name span {
      display: block;
      margin-top: 3px;
      color: var(--muted);
      font-size: .77rem;
      font-weight: 600;
    }

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

    .desktop-nav a {
      padding: 10px 12px;
      border: 1px solid transparent;
      border-radius: 999px;
      color: var(--soft);
      font-size: .92rem;
      font-weight: 700;
      white-space: nowrap;
    }

    .desktop-nav a:hover,
    .desktop-nav a.active {
      border-color: rgba(0, 240, 255, 0.3);
      color: var(--text);
      background: rgba(0, 240, 255, 0.1);
    }

    .nav-actions {
      display: flex;
      align-items: center;
      gap: 8px;
      flex: 0 0 auto;
    }

    .login-link {
      padding: 10px 8px;
      color: var(--soft);
      font-size: .9rem;
      font-weight: 700;
    }

    .login-link:hover {
      color: var(--cyan);
    }

    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 9px;
      min-height: 44px;
      padding: 12px 18px;
      border: 1px solid transparent;
      border-radius: 999px;
      font-weight: 850;
      line-height: 1.1;
      transition: transform .18s ease, box-shadow .18s ease, background .18s ease, border-color .18s ease, color .18s ease;
    }

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

    .btn:active {
      transform: translateY(1px) scale(.98);
    }

    .btn:focus-visible,
    a:focus-visible,
    input:focus-visible,
    textarea:focus-visible,
    summary:focus-visible {
      outline: 3px solid rgba(204, 255, 0, .55);
      outline-offset: 3px;
    }

    .btn-primary {
      color: #06111e;
      background: linear-gradient(135deg, var(--lime), var(--cyan));
      box-shadow: 0 12px 30px rgba(0, 240, 255, .25);
    }

    .btn-primary:hover {
      box-shadow: 0 16px 38px rgba(204, 255, 0, .28);
    }

    .btn-secondary {
      border-color: rgba(0, 240, 255, .42);
      color: var(--text);
      background: rgba(0, 240, 255, .08);
    }

    .btn-secondary:hover {
      border-color: var(--cyan);
      box-shadow: var(--glow);
    }

    .btn-ghost {
      border-color: rgba(255, 255, 255, .14);
      color: var(--soft);
      background: rgba(255, 255, 255, .04);
    }

    .mobile-menu-toggle {
      display: none;
      width: 44px;
      height: 44px;
      border: 1px solid var(--line);
      border-radius: 12px;
      color: var(--text);
      background: rgba(0, 240, 255, .08);
    }

    .mobile-nav {
      display: none;
      padding: 10px 0 16px;
      border-top: 1px solid var(--line);
    }

    .mobile-nav a {
      display: block;
      padding: 11px 14px;
      border-radius: 12px;
      color: var(--soft);
      font-weight: 750;
    }

    .mobile-nav a.active,
    .mobile-nav a:hover {
      color: var(--text);
      background: rgba(0, 240, 255, .09);
    }

    .page-banner {
      position: relative;
      overflow: hidden;
      min-height: 395px;
      display: flex;
      align-items: center;
      background:
        linear-gradient(90deg, rgba(5, 10, 23, .94), rgba(8, 19, 39, .82), rgba(8, 19, 39, .54)),
        url("/assets/images/backpic/back-2.jpg") center/cover no-repeat;
      border-bottom: 1px solid rgba(0, 240, 255, .18);
    }

    .page-banner::after {
      content: "";
      position: absolute;
      right: -8%;
      bottom: -40%;
      width: 48%;
      height: 120%;
      border: 1px solid rgba(0, 240, 255, .23);
      transform: rotate(22deg);
      box-shadow: 0 0 50px rgba(0, 240, 255, .1);
    }

    .banner-content {
      position: relative;
      z-index: 1;
      max-width: 790px;
      padding: 72px 0 68px;
    }

    .eyebrow {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      margin-bottom: 18px;
      color: var(--lime);
      font-size: .75rem;
      font-weight: 850;
      letter-spacing: .12em;
      text-transform: uppercase;
    }

    .eyebrow::before {
      content: "";
      width: 30px;
      height: 2px;
      background: var(--cyan);
      box-shadow: 0 0 12px var(--cyan);
    }

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

    h1 {
      max-width: 800px;
      margin-bottom: 20px;
      font-size: clamp(2.15rem, 5vw, 4.55rem);
      font-weight: 900;
      letter-spacing: -.055em;
      line-height: 1.03;
    }

    .banner-content h1 span {
      color: var(--cyan);
    }

    .lead {
      max-width: 690px;
      margin-bottom: 28px;
      color: var(--soft);
      font-size: clamp(1rem, 1.8vw, 1.18rem);
      line-height: 1.7;
    }

    .banner-actions {
      display: flex;
      flex-wrap: wrap;
      align-items: center;
      gap: 12px;
    }

    .section {
      padding: 92px 0;
    }

    .section-tight {
      padding: 60px 0;
    }

    .section-heading {
      max-width: 720px;
      margin-bottom: 42px;
    }

    .section-heading h2 {
      margin-bottom: 13px;
      font-size: clamp(1.8rem, 3vw, 2.8rem);
      font-weight: 850;
      letter-spacing: -.04em;
      line-height: 1.1;
    }

    .section-heading p {
      margin-bottom: 0;
      color: var(--muted);
      font-size: 1.02rem;
    }

    .heading-line {
      width: 74px;
      height: 4px;
      margin-top: 18px;
      background: linear-gradient(90deg, var(--lime), var(--cyan));
      box-shadow: 0 0 16px rgba(0, 240, 255, .45);
    }

    .intro-layout {
      display: grid;
      grid-template-columns: minmax(0, 1.08fr) minmax(300px, .92fr);
      gap: 48px;
      align-items: center;
    }

    .intro-copy p {
      color: var(--soft);
      font-size: 1.05rem;
    }

    .intro-copy p:last-child {
      margin-bottom: 0;
    }

    .feature-list {
      display: grid;
      gap: 14px;
      margin: 28px 0 0;
      padding: 0;
      list-style: none;
    }

    .feature-list li {
      display: flex;
      align-items: flex-start;
      gap: 13px;
      color: var(--soft);
    }

    .feature-list i {
      display: grid;
      place-items: center;
      width: 25px;
      height: 25px;
      flex: 0 0 25px;
      margin-top: 3px;
      border-radius: 50%;
      color: #071326;
      background: var(--lime);
      font-size: .73rem;
    }

    .cover-frame {
      position: relative;
      padding: 11px;
      border: 1px solid rgba(0, 240, 255, .32);
      border-radius: var(--radius-lg);
      background: rgba(0, 240, 255, .06);
      box-shadow: var(--shadow);
      transform: rotate(2deg);
    }

    .cover-frame::before {
      content: "";
      position: absolute;
      inset: 18px -10px -12px 20px;
      z-index: -1;
      border: 1px solid rgba(204, 255, 0, .28);
      border-radius: var(--radius-lg);
    }

    .cover-frame img {
      width: 100%;
      height: 365px;
      object-fit: cover;
      border-radius: 15px;
    }

    .cover-caption {
      position: absolute;
      right: 24px;
      bottom: 22px;
      left: 24px;
      padding: 14px 16px;
      border: 1px solid rgba(0, 240, 255, .32);
      border-radius: 12px;
      color: var(--text);
      background: rgba(7, 13, 28, .86);
      backdrop-filter: blur(12px);
      font-size: .87rem;
      font-weight: 700;
      transform: rotate(-2deg);
    }

    .benefit-band {
      border-top: 1px solid rgba(0, 240, 255, .12);
      border-bottom: 1px solid rgba(0, 240, 255, .12);
      background: rgba(6, 18, 37, .58);
    }

    .benefit-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 0;
    }

    .benefit-item {
      min-height: 148px;
      padding: 27px 24px;
      border-right: 1px solid rgba(0, 240, 255, .14);
    }

    .benefit-item:first-child {
      padding-left: 0;
    }

    .benefit-item:last-child {
      padding-right: 0;
      border-right: 0;
    }

    .benefit-item i {
      margin-bottom: 13px;
      color: var(--cyan);
      font-size: 1.35rem;
    }

    .benefit-item strong {
      display: block;
      margin-bottom: 5px;
      color: var(--text);
      font-size: 1rem;
    }

    .benefit-item span {
      display: block;
      color: var(--muted);
      font-size: .88rem;
      line-height: 1.5;
    }

    .dark-section {
      background: linear-gradient(110deg, rgba(6, 15, 32, .85), rgba(12, 25, 52, .5));
      border-top: 1px solid rgba(0, 240, 255, .1);
      border-bottom: 1px solid rgba(0, 240, 255, .1);
    }

    .feature-columns {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 22px;
    }

    .feature-card {
      position: relative;
      min-height: 265px;
      padding: 28px;
      overflow: hidden;
      border: 1px solid var(--line);
      border-radius: var(--radius-md);
      background: linear-gradient(145deg, rgba(17, 29, 54, .86), rgba(8, 23, 44, .7));
      transition: transform .25s ease, border-color .25s ease, box-shadow .25s ease;
    }

    .feature-card::after {
      content: "";
      position: absolute;
      right: -30px;
      bottom: -48px;
      width: 130px;
      height: 130px;
      border: 1px solid rgba(204, 255, 0, .18);
      border-radius: 50%;
    }

    .feature-card:hover {
      border-color: rgba(0, 240, 255, .7);
      box-shadow: var(--glow);
      transform: translateY(-6px);
    }

    .feature-icon {
      display: grid;
      width: 48px;
      height: 48px;
      place-items: center;
      margin-bottom: 23px;
      border: 1px solid rgba(204, 255, 0, .42);
      border-radius: 13px;
      color: var(--lime);
      background: rgba(204, 255, 0, .08);
      font-size: 1.18rem;
    }

    .feature-card h3 {
      margin-bottom: 10px;
      font-size: 1.17rem;
      font-weight: 800;
    }

    .feature-card p {
      margin-bottom: 0;
      color: var(--muted);
      font-size: .94rem;
    }

    .compat-layout {
      display: grid;
      grid-template-columns: .83fr 1.17fr;
      gap: 52px;
      align-items: start;
    }

    .compat-visual {
      position: relative;
      min-height: 410px;
      padding: 26px;
      overflow: hidden;
      border-left: 3px solid var(--cyan);
      background:
        linear-gradient(145deg, rgba(0, 240, 255, .14), rgba(7, 19, 39, .8)),
        url("/assets/images/backpic/back-3.jpg") center/cover;
    }

    .compat-visual::before {
      content: "";
      position: absolute;
      inset: 0;
      background: linear-gradient(135deg, transparent 35%, rgba(0, 240, 255, .12));
    }

    .compat-visual-content {
      position: relative;
      z-index: 1;
      padding-top: 174px;
    }

    .compat-visual h3 {
      max-width: 320px;
      margin-bottom: 10px;
      font-size: 1.75rem;
      line-height: 1.15;
    }

    .compat-visual p {
      max-width: 340px;
      margin-bottom: 0;
      color: var(--soft);
    }

    .spec-table {
      width: 100%;
      margin: 0;
      border: 0;
      background: transparent;
    }

    .spec-table tr {
      border-bottom: 1px solid rgba(0, 240, 255, .14);
    }

    .spec-table tr:last-child {
      border-bottom: 0;
    }

    .spec-table th,
    .spec-table td {
      padding: 18px 0;
      border: 0;
      color: var(--soft);
      background: transparent;
      vertical-align: top;
      text-align: left;
    }

    .spec-table th {
      width: 37%;
      color: var(--text);
      font-size: .93rem;
    }

    .spec-table td {
      color: var(--muted);
      font-size: .93rem;
    }

    .status {
      display: inline-flex;
      align-items: center;
      gap: 7px;
      color: var(--lime);
      font-weight: 750;
    }

    .status::before {
      content: "";
      width: 8px;
      height: 8px;
      border-radius: 50%;
      background: var(--lime);
      box-shadow: 0 0 12px var(--lime);
    }

    .steps-layout {
      display: grid;
      grid-template-columns: .7fr 1.3fr;
      gap: 58px;
      align-items: start;
    }

    .steps-note {
      padding-top: 10px;
    }

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

    .step-list {
      display: grid;
      gap: 0;
      margin: 0;
      padding: 0;
      list-style: none;
    }

    .step-item {
      position: relative;
      display: grid;
      grid-template-columns: 52px 1fr;
      gap: 18px;
      padding-bottom: 28px;
    }

    .step-item:not(:last-child)::after {
      content: "";
      position: absolute;
      top: 46px;
      bottom: 0;
      left: 25px;
      width: 1px;
      background: linear-gradient(var(--cyan), rgba(0, 240, 255, .08));
    }

    .step-number {
      position: relative;
      z-index: 1;
      display: grid;
      width: 52px;
      height: 52px;
      place-items: center;
      border: 1px solid var(--cyan);
      border-radius: 50%;
      color: var(--cyan);
      background: var(--bg-deep);
      box-shadow: 0 0 18px rgba(0, 240, 255, .18);
      font-weight: 850;
    }

    .step-item h3 {
      margin: 4px 0 5px;
      font-size: 1.05rem;
    }

    .step-item p {
      margin-bottom: 0;
      color: var(--muted);
      font-size: .93rem;
    }

    .download-section {
      background:
        linear-gradient(105deg, rgba(6, 15, 32, .95), rgba(14, 39, 59, .72)),
        url("/assets/images/backpic/back-1.jpg") center/cover;
    }

    .download-layout {
      display: grid;
      grid-template-columns: 1.08fr .92fr;
      gap: 46px;
      align-items: center;
    }

    .download-copy h2 {
      max-width: 600px;
      margin-bottom: 15px;
      font-size: clamp(1.8rem, 3.2vw, 3rem);
      line-height: 1.1;
      letter-spacing: -.045em;
    }

    .download-copy p {
      max-width: 590px;
      margin-bottom: 24px;
      color: var(--soft);
    }

    .mini-points {
      display: flex;
      flex-wrap: wrap;
      gap: 10px;
      margin: 0;
      padding: 0;
      list-style: none;
    }

    .mini-points li {
      padding: 8px 12px;
      border: 1px solid rgba(204, 255, 0, .3);
      border-radius: 999px;
      color: var(--soft);
      background: rgba(204, 255, 0, .06);
      font-size: .82rem;
      font-weight: 700;
    }

    .lead-form {
      padding: 29px;
      border: 1px solid rgba(0, 240, 255, .34);
      border-radius: var(--radius-lg);
      background: rgba(7, 15, 31, .78);
      box-shadow: var(--shadow);
    }

    .lead-form h3 {
      margin-bottom: 8px;
      font-size: 1.32rem;
    }

    .lead-form > p {
      margin-bottom: 20px;
      color: var(--muted);
      font-size: .9rem;
    }

    .form-field {
      margin-bottom: 14px;
    }

    .form-field label {
      display: block;
      margin-bottom: 6px;
      color: var(--soft);
      font-size: .82rem;
      font-weight: 750;
    }

    .form-field input,
    .form-field textarea,
    .form-field select {
      width: 100%;
      min-height: 46px;
      margin: 0;
      padding: 11px 13px;
      border: 1px solid rgba(0, 240, 255, .2);
      border-radius: 10px;
      outline: 0;
      color: var(--text);
      background: rgba(255, 255, 255, .06);
      box-shadow: none;
    }

    .form-field textarea {
      min-height: 82px;
      resize: vertical;
    }

    .form-field input::placeholder,
    .form-field textarea::placeholder {
      color: #82909b;
    }

    .form-field input:focus,
    .form-field textarea:focus,
    .form-field select:focus {
      border-color: var(--cyan);
      box-shadow: 0 0 0 3px rgba(0, 240, 255, .12);
    }

    .lead-form .btn {
      width: 100%;
      margin-top: 4px;
    }

    .form-note {
      margin: 13px 0 0;
      color: #8796a5;
      font-size: .76rem;
      line-height: 1.5;
    }

    .faq-layout {
      display: grid;
      grid-template-columns: .78fr 1.22fr;
      gap: 62px;
      align-items: start;
    }

    .faq-intro p {
      color: var(--muted);
    }

    .faq-intro .btn {
      margin-top: 14px;
    }

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

    .faq-item {
      border: 1px solid rgba(0, 240, 255, .18);
      border-radius: 12px;
      background: rgba(17, 29, 54, .54);
    }

    .faq-item[open] {
      border-color: rgba(0, 240, 255, .5);
      background: rgba(17, 39, 65, .72);
    }

    .faq-item summary {
      position: relative;
      padding: 18px 48px 18px 19px;
      color: var(--text);
      cursor: pointer;
      font-size: .98rem;
      font-weight: 750;
      list-style: none;
    }

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

    .faq-item summary::after {
      content: "+";
      position: absolute;
      top: 13px;
      right: 18px;
      color: var(--cyan);
      font-size: 1.35rem;
      font-weight: 400;
    }

    .faq-item[open] summary::after {
      content: "−";
      color: var(--lime);
    }

    .faq-answer {
      padding: 0 19px 19px;
      color: var(--muted);
      font-size: .91rem;
    }

    .cta-panel {
      position: relative;
      overflow: hidden;
      padding: 58px 62px;
      border: 1px solid rgba(204, 255, 0, .33);
      border-radius: var(--radius-lg);
      background:
        linear-gradient(110deg, rgba(16, 43, 63, .93), rgba(17, 24, 53, .88)),
        url("/assets/images/coverpic/cover-7.jpg") center/cover;
      box-shadow: var(--shadow);
    }

    .cta-panel::after {
      content: "";
      position: absolute;
      top: -90px;
      right: -70px;
      width: 280px;
      height: 280px;
      border: 2px solid rgba(0, 240, 255, .26);
      border-radius: 50%;
      box-shadow: 0 0 0 24px rgba(0, 240, 255, .05), 0 0 0 48px rgba(0, 240, 255, .025);
    }

    .cta-content {
      position: relative;
      z-index: 1;
      max-width: 710px;
    }

    .cta-content h2 {
      margin-bottom: 13px;
      font-size: clamp(1.75rem, 3vw, 2.8rem);
      line-height: 1.1;
    }

    .cta-content p {
      margin-bottom: 24px;
      color: var(--soft);
    }

    .site-footer {
      padding: 66px 0 24px;
      border-top: 1px solid rgba(0, 240, 255, .18);
      background: rgba(4, 10, 23, .76);
    }

    .footer-grid {
      display: grid;
      grid-template-columns: 1.45fr .8fr .9fr 1fr;
      gap: 34px;
      padding-bottom: 45px;
    }

    .footer-title {
      margin-bottom: 14px;
      color: var(--text);
      font-size: 1rem;
      font-weight: 850;
    }

    .footer-text {
      max-width: 340px;
      margin-bottom: 18px;
      color: var(--muted);
      font-size: .87rem;
    }

    .trust-badges {
      display: flex;
      flex-wrap: wrap;
      gap: 8px;
    }

    .trust-badges span {
      padding: 6px 9px;
      border: 1px solid rgba(0, 240, 255, .22);
      border-radius: 7px;
      color: var(--soft);
      font-size: .72rem;
      font-weight: 700;
    }

    .trust-badges i {
      margin-right: 4px;
      color: var(--lime);
    }

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

    .footer-links a,
    .inline-link {
      color: var(--muted);
      font-size: .87rem;
    }

    .footer-links a:hover,
    .inline-link:hover {
      color: var(--cyan);
    }

    .inline-link {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      color: var(--cyan);
      font-weight: 750;
    }

    .copyright {
      display: flex;
      justify-content: space-between;
      gap: 20px;
      padding-top: 20px;
      border-top: 1px solid rgba(255, 255, 255, .1);
      color: #7f8d9d;
      font-size: .76rem;
    }

    .fab-support {
      position: fixed;
      left: 16px;
      bottom: 96px;
      z-index: 50;
      display: inline-flex;
      align-items: center;
      gap: 9px;
      min-height: 52px;
      padding: 10px 16px;
      border: 1px solid transparent;
      border-radius: 999px;
      color: var(--text);
      background:
        linear-gradient(rgba(7, 13, 28, .94), rgba(7, 13, 28, .94)) padding-box,
        linear-gradient(120deg, var(--lime), var(--cyan), var(--pink)) border-box;
      box-shadow: 0 0 18px rgba(0, 240, 255, .38);
      font-size: .83rem;
      font-weight: 800;
      opacity: .72;
      animation: softPulse 3s ease-in-out infinite;
    }

    .fab-support i {
      color: var(--cyan);
      font-size: 1.05rem;
      transition: transform .4s ease;
    }

    .fab-support:hover {
      color: var(--text);
      opacity: 1;
      box-shadow: 0 0 32px rgba(0, 240, 255, .7);
      transform: scale(1.08);
    }

    .fab-support:hover i {
      transform: rotate(360deg);
    }

    .fab-dot {
      position: absolute;
      top: -3px;
      right: -2px;
      width: 10px;
      height: 10px;
      border: 2px solid var(--bg-deep);
      border-radius: 50%;
      background: var(--pink);
      box-shadow: 0 0 12px var(--pink);
    }

    @keyframes softPulse {
      0%, 100% { opacity: .62; transform: translateY(0); }
      50% { opacity: .88; transform: translateY(-4px); }
    }

    .success-message {
      display: none;
      margin: 12px 0 0;
      padding: 10px 12px;
      border-left: 3px solid var(--lime);
      color: var(--lime);
      background: rgba(204, 255, 0, .08);
      font-size: .82rem;
    }

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

    @media (max-width: 1100px) {
      .desktop-nav {
        gap: 2px;
      }

      .desktop-nav a {
        padding: 9px 8px;
        font-size: .82rem;
      }

      .brand {
        min-width: 190px;
      }

      .footer-grid {
        grid-template-columns: 1.3fr 1fr 1fr;
      }

      .footer-grid > div:last-child {
        grid-column: 2 / 4;
      }
    }

    @media (max-width: 900px) {
      .desktop-nav {
        display: none;
      }

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

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

      .hero-stage,
      .intro-layout,
      .download-layout {
        grid-template-columns: 1fr;
      }

      .intro-layout {
        gap: 44px;
      }

      .cover-frame {
        max-width: 560px;
        margin: 0 auto;
      }

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

      .benefit-item,
      .benefit-item:first-child,
      .benefit-item:last-child {
        padding: 25px 20px;
        border-right: 1px solid rgba(0, 240, 255, .14);
        border-bottom: 1px solid rgba(0, 240, 255, .14);
      }

      .benefit-item:nth-child(2n) {
        border-right: 0;
      }

      .benefit-item:nth-last-child(-n+2) {
        border-bottom: 0;
      }

      .feature-columns {
        grid-template-columns: repeat(3, 1fr);
        gap: 14px;
      }

      .feature-card {
        padding: 22px;
      }

      .compat-layout,
      .steps-layout,
      .faq-layout {
        grid-template-columns: 1fr;
        gap: 38px;
      }

      .compat-visual {
        min-height: 310px;
      }

      .compat-visual-content {
        padding-top: 90px;
      }
    }

    @media (max-width: 700px) {
      .container {
        width: min(var(--container), calc(100% - 28px));
      }

      .nav-shell {
        min-height: 68px;
        gap: 8px;
      }

      .brand {
        min-width: 0;
      }

      .brand-mark {
        width: 39px;
        height: 39px;
        border-radius: 11px;
      }

      .brand-name {
        max-width: 215px;
        font-size: .84rem;
      }

      .brand-name span {
        font-size: .68rem;
      }

      .nav-actions {
        gap: 2px;
      }

      .login-link {
        display: none;
      }

      .nav-actions .btn {
        min-height: 40px;
        padding: 10px 13px;
        font-size: .8rem;
      }

      .hero {
        min-height: 560px;
      }

      .banner-content {
        padding: 62px 0 58px;
      }

      h1 {
        font-size: clamp(2.05rem, 10vw, 3.4rem);
      }

      .lead {
        font-size: .98rem;
      }

      .section {
        padding: 68px 0;
      }

      .section-tight {
        padding: 46px 0;
      }

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

      .feature-card {
        min-height: auto;
      }

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

      .benefit-item,
      .benefit-item:first-child,
      .benefit-item:last-child,
      .benefit-item:nth-child(2n) {
        min-height: auto;
        padding: 20px 0;
        border-right: 0;
        border-bottom: 1px solid rgba(0, 240, 255, .14);
      }

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

      .cover-frame img {
        height: 300px;
      }

      .spec-table th {
        width: 42%;
      }

      .download-section {
        background-position: 62% center;
      }

      .lead-form {
        padding: 22px;
      }

      .cta-panel {
        padding: 38px 24px;
      }

      .footer-grid {
        grid-template-columns: 1fr 1fr;
        gap: 28px 20px;
      }

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

      .copyright {
        display: grid;
        gap: 9px;
      }
    }

    @media (max-width: 520px) {
      .brand-name span {
        display: none;
      }

      .brand-name {
        max-width: 165px;
        font-size: .78rem;
      }

      .nav-actions .btn {
        padding: 9px 11px;
      }

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

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

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

      .section-heading {
        margin-bottom: 30px;
      }

      .cover-frame {
        transform: none;
      }

      .cover-frame::before {
        display: none;
      }

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

      .spec-table th,
      .spec-table td {
        display: block;
        width: 100%;
        padding: 9px 0 2px;
      }

      .spec-table td {
        padding: 0 0 13px;
      }

      .step-item {
        grid-template-columns: 43px 1fr;
        gap: 13px;
      }

      .step-number {
        width: 43px;
        height: 43px;
      }

      .step-item:not(:last-child)::after {
        left: 21px;
        top: 40px;
      }

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

      .footer-grid > div:last-child {
        grid-column: auto;
      }

      .fab-support {
        left: 14px;
        bottom: 76px;
        min-width: 48px;
        width: 48px;
        height: 48px;
        padding: 0;
        justify-content: center;
      }

      .fab-support span {
        display: none;
      }
    }

/* roulang page: category3 */
:root{
      --bg:#0f0c20;
      --bg-deep:#071326;
      --panel:rgba(17,29,54,.78);
      --panel-solid:#101c34;
      --panel-soft:rgba(13,39,63,.74);
      --text:#fff;
      --muted:#a6acaf;
      --soft:#d7eff4;
      --cyan:#00f0ff;
      --lime:#ccff00;
      --blue:#2c63ff;
      --pink:#ff3ab5;
      --line:rgba(0,240,255,.22);
      --line-strong:rgba(204,255,0,.42);
      --shadow:0 22px 70px rgba(0,0,0,.45);
      --glow:0 0 24px rgba(0,240,255,.26);
      --radius-sm:8px;
      --radius-md:14px;
      --radius-lg:22px;
      --container:1180px;
      --font:"Inter","Segoe UI",Roboto,Arial,sans-serif
    }
    *{box-sizing:border-box}
    html{scroll-behavior:smooth}
    body{
      margin:0;
      color:var(--text);
      font-family:var(--font);
      line-height:1.62;
      background:
        radial-gradient(circle at 16% 0%,rgba(0,240,255,.18),transparent 32%),
        radial-gradient(circle at 88% 18%,rgba(204,255,0,.12),transparent 30%),
        linear-gradient(145deg,var(--bg),var(--bg-deep) 58%,#06101f);
      overflow-x:hidden
    }
    body::before{
      content:"";
      position:fixed;
      inset:0;
      pointer-events:none;
      z-index:-2;
      background-image:linear-gradient(rgba(255,255,255,.035) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.03) 1px,transparent 1px);
      background-size:42px 42px;
      mask-image:linear-gradient(to bottom,rgba(0,0,0,.75),transparent 82%)
    }
    a{color:inherit;text-decoration:none;transition:color .2s ease,border-color .2s ease,transform .2s ease,background .2s ease}
    img{display:block;max-width:100%;height:auto}
    button,input,textarea{font:inherit}
    button{cursor:pointer}
    .container{width:min(var(--container),calc(100% - 32px));margin:0 auto}
    .site-header{
      position:sticky;
      top:0;
      z-index:100;
      border-bottom:1px solid rgba(0,240,255,.2);
      background:rgba(7,13,28,.86);
      backdrop-filter:blur(18px);
      box-shadow:0 12px 34px rgba(0,0,0,.28)
    }
    .nav-shell{min-height:76px;display:flex;align-items:center;justify-content:space-between;gap:18px}
    .brand{display:flex;align-items:center;gap:12px;min-width:210px}
    .brand-mark{
      width:44px;height:44px;display:grid;place-items:center;flex:0 0 auto;
      border-radius:14px;color:#05111e;background:linear-gradient(135deg,var(--lime),var(--cyan));
      box-shadow:0 0 26px rgba(0,240,255,.35)
    }
    .brand-name{font-weight:800;line-height:1.15;font-size:.98rem;max-width:330px}
    .brand-name span{display:block;color:var(--muted);font-size:.77rem;font-weight:600;margin-top:3px}
    .desktop-nav{display:flex;align-items:center;gap:6px;margin-left:auto}
    .desktop-nav a{
      color:var(--soft);padding:10px 12px;border-radius:999px;font-size:.92rem;font-weight:700;
      border:1px solid transparent;white-space:nowrap
    }
    .desktop-nav a:hover,.desktop-nav a.active{color:var(--text);background:rgba(0,240,255,.1);border-color:rgba(0,240,255,.3)}
    .nav-actions{display:flex;align-items:center;gap:8px;flex:0 0 auto}
    .login-link{color:var(--soft);font-size:.9rem;font-weight:700;padding:10px 6px}
    .login-link:hover{color:var(--cyan)}
    .btn{
      display:inline-flex;align-items:center;justify-content:center;gap:9px;min-height:44px;
      padding:12px 18px;border-radius:999px;border:1px solid transparent;font-weight:850;line-height:1.1;
      transition:transform .18s ease,box-shadow .18s ease,background .18s ease,border-color .18s ease,color .18s ease
    }
    .btn:hover{transform:translateY(-2px)}
    .btn:active{transform:translateY(1px) scale(.98)}
    .btn:focus-visible,a:focus-visible,input:focus-visible,textarea:focus-visible{outline:3px solid rgba(204,255,0,.55);outline-offset:3px}
    .btn-primary{color:#06111e;background:linear-gradient(135deg,var(--lime),var(--cyan));box-shadow:0 12px 30px rgba(0,240,255,.25)}
    .btn-primary:hover{box-shadow:0 16px 38px rgba(204,255,0,.28)}
    .btn-secondary{color:var(--text);border-color:rgba(0,240,255,.42);background:rgba(0,240,255,.08)}
    .btn-secondary:hover{border-color:var(--cyan);box-shadow:var(--glow)}
    .btn-ghost{color:var(--soft);border-color:rgba(255,255,255,.14);background:rgba(255,255,255,.04)}
    .mobile-menu-toggle{
      display:none;width:44px;height:44px;border-radius:12px;border:1px solid var(--line);
      background:rgba(0,240,255,.08);color:var(--text)
    }
    .mobile-nav{display:none;border-top:1px solid var(--line);padding:10px 0 16px}
    .mobile-nav a{display:block;padding:11px 14px;border-radius:12px;color:var(--soft);font-weight:750}
    .mobile-nav a.active,.mobile-nav a:hover{background:rgba(0,240,255,.09);color:var(--text)}
    .page-banner{
      position:relative;
      min-height:430px;
      display:flex;
      align-items:center;
      overflow:hidden;
      background:
        linear-gradient(90deg,rgba(5,10,23,.94),rgba(8,19,39,.8),rgba(8,19,39,.48)),
        url("/assets/images/backpic/back-2.jpg") center/cover no-repeat
    }
    .page-banner::after{content:"";position:absolute;inset:auto 0 0;height:120px;background:linear-gradient(to bottom,transparent,var(--bg-deep))}
    .banner-content{position:relative;z-index:1;padding:78px 0 68px;max-width:850px}
    .eyebrow,.section-kicker{
      display:inline-flex;align-items:center;gap:8px;color:var(--lime);font-size:.76rem;
      font-weight:850;letter-spacing:.12em;text-transform:uppercase
    }
    .eyebrow::before,.section-kicker::before{content:"";width:28px;height:2px;background:var(--cyan);box-shadow:0 0 10px var(--cyan)}
    h1,h2,h3,p{margin-top:0}
    h1{font-size:clamp(2.25rem,5vw,4.35rem);line-height:1.06;letter-spacing:-.045em;margin:18px 0 20px;font-weight:900}
    h2{font-size:clamp(1.8rem,3vw,2.65rem);line-height:1.12;letter-spacing:-.03em;margin:12px 0 15px;font-weight:850}
    h3{font-size:1.22rem;line-height:1.25;margin:0 0 9px;font-weight:800}
    .lead{font-size:clamp(1rem,1.7vw,1.18rem);color:var(--soft);max-width:760px;margin-bottom:27px}
    .banner-actions{display:flex;flex-wrap:wrap;gap:12px}
    .section{padding:92px 0}
    .section.compact{padding:66px 0}
    .section-header{max-width:730px;margin-bottom:36px}
    .section-header p{color:var(--muted);margin-bottom:0}
    .intro-layout{display:grid;grid-template-columns:minmax(0,1.08fr) minmax(320px,.92fr);gap:54px;align-items:center}
    .intro-copy p{color:var(--muted);font-size:1.04rem}
    .image-frame{position:relative;border-radius:var(--radius-lg);overflow:hidden;border:1px solid var(--line);box-shadow:var(--shadow)}
    .image-frame img{width:100%;min-height:360px;object-fit:cover}
    .image-frame::after{content:"";position:absolute;inset:0;background:linear-gradient(135deg,rgba(0,240,255,.15),transparent 46%,rgba(204,255,0,.12));pointer-events:none}
    .image-note{
      position:absolute;left:18px;bottom:18px;padding:12px 15px;border:1px solid rgba(204,255,0,.36);
      border-radius:12px;background:rgba(7,13,28,.82);backdrop-filter:blur(8px);font-size:.88rem;font-weight:700
    }
    .feature-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
    .feature-item{
      padding:25px 22px;border-top:2px solid var(--cyan);background:linear-gradient(145deg,rgba(16,28,52,.92),rgba(12,23,43,.68));
      border-radius:var(--radius-md);box-shadow:0 14px 38px rgba(0,0,0,.22);transition:transform .2s ease,border-color .2s ease,box-shadow .2s ease
    }
    .feature-item:nth-child(2){border-top-color:var(--lime)}
    .feature-item:nth-child(3){border-top-color:var(--pink)}
    .feature-item:hover{transform:translateY(-6px);box-shadow:var(--glow)}
    .feature-icon{width:42px;height:42px;display:grid;place-items:center;border-radius:12px;background:rgba(0,240,255,.11);color:var(--cyan);margin-bottom:18px;font-size:1.1rem}
    .feature-item:nth-child(2) .feature-icon{color:var(--lime);background:rgba(204,255,0,.1)}
    .feature-item:nth-child(3) .feature-icon{color:var(--pink);background:rgba(255,58,181,.1)}
    .feature-item p{color:var(--muted);font-size:.94rem;margin-bottom:0}
    .dark-band{background:linear-gradient(115deg,rgba(9,25,49,.9),rgba(16,12,35,.88));border-top:1px solid rgba(0,240,255,.13);border-bottom:1px solid rgba(0,240,255,.13)}
    .scenario-layout{display:grid;grid-template-columns:.75fr 1.25fr;gap:58px;align-items:start}
    .scenario-list{border-left:1px solid var(--line);padding-left:24px}
    .scenario-row{position:relative;padding:0 0 28px 25px}
    .scenario-row:last-child{padding-bottom:0}
    .scenario-row::before{content:"";position:absolute;left:-31px;top:5px;width:11px;height:11px;border-radius:50%;background:var(--lime);box-shadow:0 0 15px var(--lime)}
    .scenario-row strong{display:block;color:var(--text);font-size:1.03rem;margin-bottom:5px}
    .scenario-row span{display:block;color:var(--muted);font-size:.95rem}
    .stat-strip{display:grid;grid-template-columns:repeat(3,1fr);gap:1px;background:var(--line);border:1px solid var(--line);margin-top:30px}
    .stat{padding:18px 20px;background:rgba(7,19,38,.82)}
    .stat b{display:block;color:var(--cyan);font-size:1.55rem;line-height:1.1;margin-bottom:5px}
    .stat span{color:var(--muted);font-size:.82rem}
    .method-layout{display:grid;grid-template-columns:1fr 1fr;gap:20px;align-items:stretch}
    .method-panel{padding:30px;border:1px solid var(--line);border-radius:var(--radius-lg);background:rgba(13,27,49,.68)}
    .method-panel.highlight{background:linear-gradient(145deg,rgba(0,240,255,.1),rgba(204,255,0,.06));border-color:var(--line-strong)}
    .number-list{list-style:none;margin:22px 0 0;padding:0}
    .number-list li{display:flex;gap:14px;padding:15px 0;border-bottom:1px solid rgba(255,255,255,.09);color:var(--soft)}
    .number-list li:last-child{border-bottom:0}
    .number{width:29px;height:29px;flex:0 0 29px;display:grid;place-items:center;border-radius:50%;color:#071326;background:var(--lime);font-size:.83rem;font-weight:900}
    .number-list strong{display:block;color:var(--text);font-size:.98rem}
    .number-list span{display:block;color:var(--muted);font-size:.9rem;margin-top:2px}
    .reminder-box{display:flex;align-items:center;justify-content:space-between;gap:24px;padding:22px 25px;border:1px solid rgba(204,255,0,.32);background:rgba(204,255,0,.06);border-radius:var(--radius-md);margin-top:25px}
    .reminder-box p{margin:0;color:var(--soft);font-size:.93rem}
    .countdown{display:flex;gap:8px;flex:0 0 auto}
    .time-box{min-width:58px;text-align:center;padding:8px 7px;border-radius:9px;background:rgba(4,12,26,.72);border:1px solid rgba(0,240,255,.3)}
    .time-box b{display:block;color:var(--cyan);font-size:1.2rem;line-height:1.1}
    .time-box small{color:var(--muted);font-size:.68rem}
    .faq-wrap{max-width:900px}
    .faq-item{border-bottom:1px solid rgba(0,240,255,.18)}
    .faq-item summary{list-style:none;cursor:pointer;padding:21px 42px 21px 0;position:relative;color:var(--text);font-weight:800;font-size:1.02rem}
    .faq-item summary::-webkit-details-marker{display:none}
    .faq-item summary::after{content:"+";position:absolute;right:5px;top:16px;color:var(--cyan);font-size:1.5rem;font-weight:400}
    .faq-item[open] summary::after{content:"−";color:var(--lime)}
    .faq-answer{color:var(--muted);padding:0 35px 22px 0;font-size:.96rem}
    .cta-section{padding:76px 0 88px;text-align:center}
    .cta-box{position:relative;overflow:hidden;padding:52px 28px;border:1px solid var(--line-strong);border-radius:var(--radius-lg);background:linear-gradient(120deg,rgba(0,240,255,.13),rgba(255,58,181,.08),rgba(204,255,0,.1));box-shadow:var(--shadow)}
    .cta-box::before{content:"";position:absolute;width:260px;height:260px;border-radius:50%;right:-80px;top:-130px;background:rgba(0,240,255,.13);filter:blur(5px)}
    .cta-box h2,.cta-box p,.cta-box .btn{position:relative;z-index:1}
    .cta-box p{max-width:680px;margin:0 auto 25px;color:var(--soft)}
    .site-footer{padding:64px 0 25px;border-top:1px solid rgba(0,240,255,.18);background:rgba(4,11,24,.72)}
    .footer-grid{display:grid;grid-template-columns:1.35fr .8fr .9fr 1fr;gap:35px}
    .footer-title{font-size:1.02rem;font-weight:850;margin-bottom:15px;color:var(--text)}
    .footer-text{color:var(--muted);font-size:.9rem;margin-bottom:18px}
    .trust-badges{display:flex;flex-wrap:wrap;gap:8px}
    .trust-badges span{padding:7px 9px;border:1px solid rgba(0,240,255,.2);border-radius:8px;color:var(--soft);font-size:.73rem}
    .trust-badges i{color:var(--lime);margin-right:4px}
    .footer-links{display:grid;gap:9px}
    .footer-links a,.inline-link{color:var(--muted);font-size:.9rem}
    .footer-links a:hover,.inline-link:hover{color:var(--cyan);transform:translateX(3px)}
    .inline-link{display:inline-flex;gap:8px;align-items:center;color:var(--lime);font-weight:800}
    .copyright{display:flex;justify-content:space-between;gap:20px;margin-top:45px;padding-top:20px;border-top:1px solid rgba(255,255,255,.09);color:#77818a;font-size:.78rem}
    .fab{
      position:fixed;left:16px;bottom:96px;z-index:50;width:55px;height:55px;display:grid;place-items:center;
      border:1px solid var(--cyan);border-radius:18px;color:var(--cyan);background:rgba(0,0,0,.68);
      box-shadow:0 0 18px rgba(0,240,255,.5);backdrop-filter:blur(10px);transition:.22s ease;animation:float 3.8s ease-in-out infinite
    }
    .fab:hover{transform:scale(1.1);color:var(--lime);box-shadow:0 0 30px rgba(204,255,0,.65)}
    .fab::after{content:"";position:absolute;right:-3px;top:-4px;width:10px;height:10px;border-radius:50%;background:var(--pink);box-shadow:0 0 10px var(--pink)}
    @keyframes float{0%,100%{translate:0 0}50%{translate:0 -6px}}
    .form-note{color:var(--muted);font-size:.82rem;margin-top:10px}
    @media(max-width:1024px){
      .desktop-nav a{padding:9px 8px;font-size:.84rem}
      .intro-layout,.scenario-layout{gap:30px}
      .footer-grid{grid-template-columns:1.2fr 1fr 1fr}
      .footer-grid>div:last-child{grid-column:span 3}
    }
    @media(max-width:768px){
      .nav-shell{min-height:68px}
      .brand{min-width:0}
      .brand-name{font-size:.88rem;max-width:220px}
      .brand-name span{font-size:.7rem}
      .brand-mark{width:39px;height:39px;border-radius:12px}
      .desktop-nav{display:none}
      .mobile-menu-toggle{display:block}
      .mobile-nav.is-open{display:block}
      .nav-actions .btn{padding:11px 13px;font-size:.83rem}
      .login-link{display:none}
      .page-banner{min-height:430px}
      .banner-content{padding:65px 0 58px}
      .intro-layout,.scenario-layout,.method-layout{grid-template-columns:1fr}
      .intro-layout{gap:28px}
      .feature-grid{grid-template-columns:1fr 1fr}
      .image-frame img{min-height:290px}
      .footer-grid{grid-template-columns:1fr 1fr;gap:28px}
      .footer-grid>div:last-child{grid-column:span 2}
      .copyright{display:block}
      .copyright span{display:block;margin-bottom:8px}
    }
    @media(max-width:520px){
      .container{width:min(var(--container),calc(100% - 24px))}
      h1{font-size:2.25rem}
      h2{font-size:1.85rem}
      .section{padding:66px 0}
      .section.compact{padding:50px 0}
      .feature-grid,.stat-strip{grid-template-columns:1fr}
      .banner-actions,.banner-actions .btn{width:100%}
      .reminder-box{display:block}
      .countdown{margin-top:17px}
      .time-box{flex:1}
      .footer-grid{grid-template-columns:1fr}
      .footer-grid>div:last-child{grid-column:auto}
      .nav-actions{gap:5px}
      .nav-actions .btn{min-height:40px;padding:10px 11px}
      .fab{left:12px;bottom:75px}
    }

/* roulang page: category2 */
:root {
      --bg: #0f0c20;
      --bg-deep: #071326;
      --panel: rgba(17, 29, 54, 0.78);
      --panel-solid: #101c34;
      --panel-soft: rgba(13, 39, 63, 0.74);
      --text: #ffffff;
      --muted: #a6acaf;
      --soft: #d7eff4;
      --cyan: #00f0ff;
      --lime: #ccff00;
      --blue: #2c63ff;
      --pink: #ff3ab5;
      --line: rgba(0, 240, 255, 0.22);
      --line-strong: rgba(204, 255, 0, 0.42);
      --shadow: 0 22px 70px rgba(0, 0, 0, 0.45);
      --glow: 0 0 24px rgba(0, 240, 255, 0.26);
      --radius-sm: 8px;
      --radius-md: 14px;
      --radius-lg: 22px;
      --container: 1180px;
      --font: "Inter", "Segoe UI", Roboto, Arial, sans-serif;
    }

    * { box-sizing: border-box; }
    html { scroll-behavior: smooth; }
    body {
      margin: 0;
      font-family: var(--font);
      color: var(--text);
      background:
        radial-gradient(circle at 13% 4%, rgba(0, 240, 255, .15), transparent 28%),
        radial-gradient(circle at 92% 22%, rgba(204, 255, 0, .10), transparent 26%),
        linear-gradient(145deg, var(--bg), var(--bg-deep) 58%, #06101f);
      line-height: 1.62;
      overflow-x: hidden;
    }
    body::before {
      content: "";
      position: fixed;
      inset: 0;
      z-index: -2;
      pointer-events: none;
      background-image: linear-gradient(rgba(255,255,255,.03) 1px, transparent 1px), linear-gradient(90deg, rgba(255,255,255,.025) 1px, transparent 1px);
      background-size: 42px 42px;
      mask-image: linear-gradient(to bottom, rgba(0,0,0,.82), transparent 84%);
    }
    a { color: inherit; text-decoration: none; transition: color .2s ease, border-color .2s ease, transform .2s ease, background .2s ease; }
    img { display: block; max-width: 100%; height: auto; }
    button, input, textarea { font: inherit; }
    button { cursor: pointer; }
    .container { width: min(var(--container), calc(100% - 32px)); margin: 0 auto; }

    .site-header {
      position: sticky; top: 0; z-index: 100;
      border-bottom: 1px solid rgba(0,240,255,.2);
      background: rgba(7,13,28,.86);
      backdrop-filter: blur(18px);
      box-shadow: 0 12px 34px rgba(0,0,0,.28);
    }
    .nav-shell { min-height: 76px; display: flex; align-items: center; justify-content: space-between; gap: 18px; }
    .brand { display: flex; align-items: center; gap: 12px; min-width: 210px; }
    .brand-mark {
      display: grid; place-items: center; flex: 0 0 auto;
      width: 44px; height: 44px; border-radius: 14px;
      color: #05111e; background: linear-gradient(135deg, var(--lime), var(--cyan));
      box-shadow: 0 0 26px rgba(0,240,255,.35);
    }
    .brand-name { max-width: 330px; font-size: .98rem; font-weight: 800; line-height: 1.15; }
    .brand-name span { display: block; margin-top: 3px; color: var(--muted); font-size: .77rem; font-weight: 600; }
    .desktop-nav { display: flex; align-items: center; gap: 6px; margin-left: auto; }
    .desktop-nav a {
      padding: 10px 12px; border: 1px solid transparent; border-radius: 999px;
      color: var(--soft); font-size: .92rem; font-weight: 700; white-space: nowrap;
    }
    .desktop-nav a:hover, .desktop-nav a.active { color: var(--text); border-color: rgba(0,240,255,.3); background: rgba(0,240,255,.1); }
    .nav-actions { display: flex; align-items: center; gap: 8px; flex: 0 0 auto; }
    .login-link { padding: 9px 4px; color: var(--soft); font-size: .9rem; font-weight: 700; }
    .login-link:hover { color: var(--cyan); }
    .btn {
      display: inline-flex; align-items: center; justify-content: center; gap: 9px;
      min-height: 44px; padding: 12px 18px; border: 1px solid transparent; border-radius: 999px;
      font-weight: 850; line-height: 1.1;
      transition: transform .18s ease, box-shadow .18s ease, background .18s ease, border-color .18s ease, color .18s ease;
    }
    .btn:hover { transform: translateY(-2px); }
    .btn:active { transform: translateY(1px) scale(.98); }
    .btn:focus-visible, a:focus-visible, input:focus-visible, textarea:focus-visible {
      outline: 3px solid rgba(204,255,0,.55); outline-offset: 3px;
    }
    .btn-primary { color: #06111e; background: linear-gradient(135deg, var(--lime), var(--cyan)); box-shadow: 0 12px 30px rgba(0,240,255,.25); }
    .btn-primary:hover { box-shadow: 0 16px 38px rgba(204,255,0,.28); }
    .btn-secondary { color: var(--text); border-color: rgba(0,240,255,.42); background: rgba(0,240,255,.08); }
    .btn-secondary:hover { border-color: var(--cyan); box-shadow: var(--glow); }
    .btn-ghost { color: var(--soft); border-color: rgba(255,255,255,.16); background: rgba(255,255,255,.04); }
    .btn-ghost:hover { color: var(--text); border-color: rgba(204,255,0,.46); }
    .mobile-menu-toggle {
      display: none; width: 44px; height: 44px; border: 1px solid var(--line); border-radius: 12px;
      color: var(--text); background: rgba(0,240,255,.08);
    }
    .mobile-nav { display: none; padding: 10px 0 16px; border-top: 1px solid var(--line); }
    .mobile-nav a { display: block; padding: 11px 14px; border-radius: 12px; color: var(--soft); font-weight: 750; }
    .mobile-nav a.active, .mobile-nav a:hover { color: var(--text); background: rgba(0,240,255,.09); }

    .page-hero {
      position: relative;
      overflow: hidden;
      min-height: 485px;
      display: flex;
      align-items: center;
      background:
        linear-gradient(90deg, rgba(5,10,23,.94), rgba(8,19,39,.80) 52%, rgba(8,19,39,.62)),
        url("/assets/images/backpic/back-2.jpg") center/cover no-repeat;
    }
    .page-hero::before {
      content: ""; position: absolute; inset: 0;
      background: linear-gradient(180deg, transparent 52%, var(--bg-deep) 100%);
    }
    .page-hero-inner { position: relative; z-index: 1; width: 100%; padding: 82px 0 66px; }
    .hero-grid { display: grid; grid-template-columns: minmax(0, 1.12fr) minmax(340px, .88fr); gap: 50px; align-items: center; }
    .eyebrow {
      display: inline-flex; align-items: center; gap: 8px; margin-bottom: 18px; padding: 7px 12px;
      color: var(--lime); border: 1px solid rgba(204,255,0,.32); border-radius: 999px;
      background: rgba(204,255,0,.08); font-size: .78rem; font-weight: 850; letter-spacing: .045em;
    }
    .eyebrow i { color: var(--cyan); }
    h1, h2, h3, p { margin-top: 0; }
    h1 {
      max-width: 760px; margin-bottom: 20px; font-size: clamp(2.2rem, 4.8vw, 4.25rem);
      line-height: 1.06; letter-spacing: -.042em; font-weight: 900;
    }
    .hero-copy { max-width: 665px; margin-bottom: 28px; color: var(--soft); font-size: 1.08rem; }
    .hero-actions { display: flex; flex-wrap: wrap; gap: 12px; }
    .status-bar {
      display: flex; flex-wrap: wrap; gap: 12px; margin-top: 30px; padding-top: 22px;
      border-top: 1px solid rgba(0,240,255,.22);
    }
    .status-item { display: inline-flex; align-items: center; gap: 8px; color: var(--soft); font-size: .87rem; font-weight: 650; }
    .status-dot { width: 9px; height: 9px; border-radius: 50%; background: var(--lime); box-shadow: 0 0 12px var(--lime); animation: pulse 1.8s infinite; }
    .icon-console {
      position: relative; padding: 28px; overflow: hidden; border: 1px solid var(--line);
      border-radius: var(--radius-lg); background: rgba(8,22,44,.77); box-shadow: var(--shadow);
    }
    .icon-console::after {
      content: ""; position: absolute; width: 180px; height: 180px; right: -55px; bottom: -72px;
      border: 1px solid rgba(204,255,0,.24); border-radius: 50%; box-shadow: 0 0 0 18px rgba(0,240,255,.04), 0 0 0 36px rgba(204,255,0,.03);
    }
    .console-head { display: flex; justify-content: space-between; align-items: center; margin-bottom: 23px; }
    .console-head strong { font-size: 1rem; }
    .signal { display: inline-flex; gap: 4px; align-items: end; height: 16px; }
    .signal span { display: block; width: 4px; border-radius: 3px; background: var(--cyan); box-shadow: 0 0 9px var(--cyan); }
    .signal span:nth-child(1) { height: 5px; } .signal span:nth-child(2) { height: 9px; } .signal span:nth-child(3) { height: 13px; } .signal span:nth-child(4) { height: 16px; }
    .icon-matrix { position: relative; z-index: 1; display: grid; grid-template-columns: repeat(3, 1fr); gap: 11px; }
    .matrix-icon {
      min-height: 97px; display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 8px;
      border: 1px solid rgba(0,240,255,.19); border-radius: 15px; color: var(--soft); background: rgba(255,255,255,.035);
      font-size: .74rem; font-weight: 750; text-align: center;
    }
    .matrix-icon i { color: var(--cyan); font-size: 1.55rem; text-shadow: 0 0 16px rgba(0,240,255,.76); }
    .matrix-icon:nth-child(2) i, .matrix-icon:nth-child(5) i { color: var(--lime); text-shadow: 0 0 16px rgba(204,255,0,.72); }
    .matrix-icon:hover { transform: translateY(-4px); border-color: var(--cyan); background: rgba(0,240,255,.10); }
    .console-note { position: relative; z-index: 1; margin: 20px 0 0; color: var(--muted); font-size: .85rem; }

    main { position: relative; }
    .section { padding: 96px 0; }
    .section-tight { padding: 65px 0; }
    .section-label { display: flex; align-items: center; gap: 10px; margin-bottom: 12px; color: var(--cyan); font-size: .78rem; font-weight: 850; letter-spacing: .09em; text-transform: uppercase; }
    .section-label::before { content: ""; width: 26px; height: 2px; background: var(--lime); box-shadow: 0 0 10px var(--lime); }
    .section-heading { max-width: 695px; margin-bottom: 13px; font-size: clamp(1.75rem, 3vw, 2.65rem); line-height: 1.18; letter-spacing: -.03em; font-weight: 870; }
    .section-intro { max-width: 700px; margin-bottom: 34px; color: var(--muted); font-size: 1.02rem; }
    .split-feature { display: grid; grid-template-columns: minmax(280px, .94fr) minmax(0, 1.06fr); gap: 62px; align-items: center; }
    .feature-visual { position: relative; }
    .feature-visual img { width: 100%; min-height: 410px; object-fit: cover; border: 1px solid var(--line); border-radius: var(--radius-lg); box-shadow: var(--shadow); }
    .visual-caption {
      position: absolute; right: -22px; bottom: 25px; max-width: 235px; padding: 18px;
      border: 1px solid rgba(204,255,0,.36); border-radius: var(--radius-md); background: rgba(8,19,39,.92);
      box-shadow: 0 16px 38px rgba(0,0,0,.35);
    }
    .visual-caption strong { display: block; margin-bottom: 3px; color: var(--lime); font-size: 1.55rem; line-height: 1; }
    .visual-caption span { color: var(--soft); font-size: .82rem; font-weight: 700; }
    .feature-copy .section-heading { margin-bottom: 17px; }
    .feature-copy > p { color: var(--muted); }
    .check-list { display: grid; gap: 13px; margin: 26px 0 30px; padding: 0; list-style: none; }
    .check-list li { display: flex; gap: 13px; align-items: flex-start; color: var(--soft); }
    .check-list i { margin-top: 5px; color: var(--lime); font-size: .94rem; }
    .check-list strong { color: var(--text); }

    .benefit-area { border-top: 1px solid rgba(0,240,255,.14); border-bottom: 1px solid rgba(0,240,255,.14); background: rgba(4,16,35,.36); }
    .benefit-layout { display: grid; grid-template-columns: .72fr 1.28fr; gap: 58px; align-items: start; }
    .benefit-layout .section-intro { margin-bottom: 0; }
    .benefit-list { border-top: 1px solid var(--line); }
    .benefit-row {
      display: grid; grid-template-columns: 50px 1fr auto; gap: 17px; align-items: center;
      padding: 20px 0; border-bottom: 1px solid var(--line);
    }
    .benefit-number { color: var(--lime); font-size: .81rem; font-weight: 900; }
    .benefit-row h3 { margin: 0 0 4px; font-size: 1.04rem; line-height: 1.3; }
    .benefit-row p { margin: 0; color: var(--muted); font-size: .92rem; }
    .benefit-row > i { color: var(--cyan); font-size: 1.1rem; }

    .device-band {
      margin-top: 50px; padding: 28px 32px; border: 1px solid rgba(204,255,0,.27); border-radius: var(--radius-lg);
      background: linear-gradient(100deg, rgba(204,255,0,.08), rgba(0,240,255,.06));
    }
    .device-band-top { display: flex; justify-content: space-between; align-items: flex-start; gap: 25px; }
    .device-band h3 { margin: 0; font-size: 1.28rem; }
    .device-band p { max-width: 600px; margin: 8px 0 0; color: var(--soft); }
    .specs { display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px; margin-top: 24px; }
    .spec { padding-left: 15px; border-left: 2px solid var(--cyan); }
    .spec strong { display: block; margin-bottom: 3px; color: var(--text); font-size: .9rem; }
    .spec span { color: var(--muted); font-size: .84rem; }

    .scene-grid { display: grid; grid-template-columns: 1.18fr .82fr; gap: 22px; }
    .scene-primary {
      position: relative; min-height: 420px; overflow: hidden; display: flex; align-items: end; padding: 33px;
      border: 1px solid var(--line); border-radius: var(--radius-lg);
      background: linear-gradient(0deg, rgba(4,12,28,.94), rgba(4,12,28,.05)), url("/assets/images/coverpic/cover-6.jpg") center/cover no-repeat;
    }
    .scene-primary-content { position: relative; z-index: 1; max-width: 570px; }
    .scene-primary h3 { margin-bottom: 10px; font-size: clamp(1.45rem, 2.6vw, 2.15rem); line-height: 1.16; }
    .scene-primary p { margin: 0; color: var(--soft); }
    .scene-column { display: grid; gap: 22px; }
    .scene-card {
      display: grid; grid-template-columns: 74px 1fr; gap: 18px; align-items: center; padding: 23px;
      border: 1px solid rgba(0,240,255,.2); border-radius: var(--radius-md); background: var(--panel);
    }
    .scene-card:hover { transform: translateY(-4px); border-color: var(--cyan); box-shadow: var(--glow); }
    .scene-card-icon {
      display: grid; place-items: center; width: 64px; height: 64px; border-radius: 18px;
      color: var(--lime); background: rgba(204,255,0,.09); border: 1px solid rgba(204,255,0,.23); font-size: 1.55rem;
    }
    .scene-card h3 { margin: 0 0 5px; font-size: 1rem; }
    .scene-card p { margin: 0; color: var(--muted); font-size: .88rem; }

    .proof-shell { display: grid; grid-template-columns: .84fr 1.16fr; gap: 54px; align-items: center; padding: 42px; border: 1px solid var(--line); border-radius: var(--radius-lg); background: rgba(10,27,51,.66); box-shadow: var(--shadow); }
    .proof-image { position: relative; }
    .proof-image img { width: 100%; min-height: 310px; object-fit: cover; border-radius: var(--radius-md); }
    .proof-chip {
      position: absolute; top: 17px; left: 17px; padding: 7px 11px; border-radius: 999px;
      color: #071326; background: var(--lime); font-size: .76rem; font-weight: 900;
    }
    .quote-mark { display: inline-block; margin-bottom: 8px; color: var(--cyan); font-size: 2.6rem; font-weight: 900; line-height: .8; }
    .proof-copy blockquote { margin: 0 0 21px; font-size: clamp(1.16rem, 2.3vw, 1.55rem); line-height: 1.47; font-weight: 650; }
    .proof-meta { color: var(--muted); font-size: .9rem; }
    .proof-meta strong { display: block; color: var(--lime); }
    .result-stats { display: grid; grid-template-columns: repeat(3, 1fr); gap: 12px; margin-top: 26px; }
    .result-stat { padding-top: 13px; border-top: 1px solid rgba(0,240,255,.34); }
    .result-stat strong { display: block; color: var(--text); font-size: 1.4rem; line-height: 1.1; }
    .result-stat span { color: var(--muted); font-size: .78rem; }

    .free-plan { display: grid; grid-template-columns: .84fr 1.16fr; gap: 45px; align-items: center; padding: 44px; border: 1px solid rgba(204,255,0,.38); border-radius: var(--radius-lg); background: linear-gradient(125deg, rgba(204,255,0,.10), rgba(0,240,255,.07) 48%, rgba(13,39,63,.65)); }
    .price-tag { display: flex; align-items: baseline; gap: 10px; margin: 13px 0; }
    .price-tag strong { color: var(--lime); font-size: clamp(3rem, 5vw, 4.4rem); line-height: .95; letter-spacing: -.06em; }
    .price-tag span { color: var(--soft); font-weight: 750; }
    .free-plan p { color: var(--soft); }
    .plan-list { display: grid; gap: 13px; margin: 0; padding: 0; list-style: none; }
    .plan-list li { display: flex; justify-content: space-between; gap: 16px; padding: 14px 0; border-bottom: 1px solid rgba(255,255,255,.12); color: var(--soft); }
    .plan-list li:last-child { border-bottom: 0; }
    .plan-list i { margin-right: 9px; color: var(--cyan); }
    .plan-list strong { color: var(--lime); white-space: nowrap; font-size: .88rem; }

    .faq-layout { display: grid; grid-template-columns: .7fr 1.3fr; gap: 58px; align-items: start; }
    .faq-note { padding: 26px; border-left: 2px solid var(--lime); background: rgba(204,255,0,.06); }
    .faq-note p { margin-bottom: 0; color: var(--soft); }
    .faq-list { border-top: 1px solid var(--line); }
    .faq-item { border-bottom: 1px solid var(--line); }
    .faq-question {
      width: 100%; display: flex; justify-content: space-between; gap: 20px; padding: 21px 0; border: 0;
      color: var(--text); background: transparent; text-align: left; font-weight: 800;
    }
    .faq-question i { color: var(--cyan); transition: transform .2s ease; }
    .faq-answer { display: none; max-width: 760px; padding: 0 38px 21px 0; color: var(--muted); }
    .faq-item.is-open .faq-answer { display: block; }
    .faq-item.is-open .faq-question i { transform: rotate(45deg); color: var(--lime); }

    .cta-section { padding: 0 0 96px; }
    .cta-box {
      position: relative; overflow: hidden; padding: 50px; border: 1px solid rgba(0,240,255,.34); border-radius: var(--radius-lg);
      background: linear-gradient(105deg, rgba(7,27,53,.94), rgba(14,22,56,.91)), url("/assets/images/backpic/back-3.jpg") center/cover no-repeat;
      box-shadow: var(--shadow);
    }
    .cta-box::after { content: ""; position: absolute; width: 270px; height: 270px; top: -135px; right: -70px; border-radius: 50%; background: rgba(0,240,255,.12); box-shadow: 0 0 0 40px rgba(204,255,0,.04); }
    .cta-content { position: relative; z-index: 1; display: grid; grid-template-columns: 1fr minmax(290px, .72fr); gap: 42px; align-items: end; }
    .cta-box h2 { max-width: 670px; margin-bottom: 11px; font-size: clamp(1.8rem, 3.3vw, 2.75rem); line-height: 1.15; }
    .cta-box p { max-width: 650px; margin-bottom: 0; color: var(--soft); }
    .quick-form { display: grid; gap: 10px; }
    .quick-form label { color: var(--soft); font-size: .82rem; font-weight: 750; }
    .quick-form input {
      width: 100%; height: 48px; margin: 0; padding: 0 15px; border: 1px solid rgba(0,240,255,.33); border-radius: 12px;
      color: var(--text); background: rgba(3,12,28,.65); box-shadow: none;
    }
    .quick-form input::placeholder { color: #8191a8; }
    .quick-form .btn { width: 100%; }
    .form-note { margin: 2px 0 0; color: var(--muted); font-size: .75rem; line-height: 1.45; }

    .site-footer { padding: 62px 0 24px; border-top: 1px solid rgba(0,240,255,.22); background: rgba(4,11,25,.88); }
    .footer-grid { display: grid; grid-template-columns: 1.5fr .9fr .95fr 1.1fr; gap: 34px; }
    .footer-title { margin-bottom: 13px; color: var(--text); font-size: .96rem; font-weight: 850; }
    .footer-text { margin: 0; color: var(--muted); font-size: .88rem; }
    .footer-links { display: grid; gap: 9px; }
    .footer-links a { color: var(--muted); font-size: .87rem; }
    .footer-links a:hover, .inline-link:hover { color: var(--cyan); transform: translateX(3px); }
    .trust-badges { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 18px; }
    .trust-badges span { display: inline-flex; align-items: center; gap: 6px; padding: 6px 9px; border: 1px solid rgba(0,240,255,.2); border-radius: 999px; color: var(--soft); font-size: .71rem; font-weight: 750; }
    .trust-badges i { color: var(--lime); }
    .inline-link { display: inline-flex; align-items: center; gap: 8px; margin-top: 16px; color: var(--cyan); font-size: .87rem; font-weight: 850; }
    .copyright { display: flex; justify-content: space-between; gap: 20px; margin-top: 45px; padding-top: 20px; border-top: 1px solid rgba(255,255,255,.09); color: #8491a3; font-size: .76rem; }

    .support-fab {
      position: fixed; left: 16px; bottom: 96px; z-index: 50; width: 57px; height: 57px; display: grid; place-items: center;
      border: 1px solid transparent; border-radius: 18px; color: var(--cyan); background: linear-gradient(#071326,#071326) padding-box, linear-gradient(135deg,var(--lime),var(--cyan),var(--blue)) border-box;
      box-shadow: 0 0 18px rgba(0,240,255,.5), inset 0 0 15px rgba(0,240,255,.1); opacity: .68; animation: fab-breathe 2.5s ease-in-out infinite;
    }
    .support-fab::before { content: ""; position: absolute; inset: 5px; border-radius: 13px; border: 1px solid rgba(255,255,255,.08); }
    .support-fab i { position: relative; z-index: 1; font-size: 1.35rem; text-shadow: 0 0 12px var(--cyan); }
    .support-fab .fab-dot { position: absolute; top: 5px; right: 5px; width: 9px; height: 9px; border-radius: 50%; background: var(--pink); box-shadow: 0 0 10px var(--pink); }
    .support-fab:hover { opacity: 1; transform: scale(1.1); box-shadow: 0 0 28px rgba(0,240,255,.78); }
    .support-fab:hover i { animation: flicker .45s linear; }
    .support-fab:active { transform: scale(.95); border-color: var(--pink); }

    @keyframes pulse { 50% { opacity: .35; transform: scale(.78); } }
    @keyframes fab-breathe { 50% { opacity: 1; transform: translateY(-5px); } }
    @keyframes flicker { 20%, 60% { opacity: .25; } 35%, 100% { opacity: 1; } }

    @media (max-width: 1080px) {
      .desktop-nav a { padding: 9px 8px; font-size: .84rem; }
      .brand { min-width: 190px; }
      .hero-grid, .split-feature, .proof-shell, .free-plan, .faq-layout, .cta-content { gap: 34px; }
      .footer-grid { grid-template-columns: repeat(2, 1fr); row-gap: 35px; }
    }
    @media (max-width: 860px) {
      .desktop-nav { display: none; }
      .mobile-menu-toggle { display: block; }
      .mobile-nav.is-open { display: block; }
      .hero-grid, .split-feature, .benefit-layout, .proof-shell, .free-plan, .faq-layout, .cta-content { grid-template-columns: 1fr; }
      .page-hero { min-height: auto; }
      .page-hero-inner { padding: 70px 0 62px; }
      .icon-console { max-width: 570px; }
      .feature-visual { max-width: 620px; }
      .benefit-layout { gap: 25px; }
      .proof-image { max-width: 610px; }
      .scene-grid { grid-template-columns: 1fr; }
      .device-band-top { display: block; }
      .device-band .btn { margin-top: 18px; }
    }
    @media (max-width: 620px) {
      .container { width: min(100% - 24px, var(--container)); }
      .nav-shell { min-height: 66px; gap: 9px; }
      .brand { min-width: 0; gap: 8px; }
      .brand-mark { width: 38px; height: 38px; border-radius: 12px; }
      .brand-name { font-size: .86rem; }
      .brand-name span { max-width: 160px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; font-size: .66rem; }
      .login-link { display: none; }
      .nav-actions .btn { min-height: 39px; padding: 9px 11px; font-size: .78rem; }
      .nav-actions .btn i { display: none; }
      .mobile-menu-toggle { width: 39px; height: 39px; }
      .page-hero-inner { padding: 56px 0 48px; }
      h1 { font-size: clamp(2rem, 10vw, 2.7rem); }
      .hero-copy { font-size: .98rem; }
      .hero-actions .btn { width: 100%; }
      .status-bar { gap: 9px 15px; }
      .icon-console { padding: 18px; }
      .matrix-icon { min-height: 82px; font-size: .66rem; }
      .section { padding: 66px 0; }
      .section-tight { padding: 48px 0; }
      .section-heading { font-size: 1.72rem; }
      .feature-visual img { min-height: 315px; }
      .visual-caption { right: 12px; bottom: 12px; max-width: 205px; padding: 14px; }
      .benefit-row { grid-template-columns: 36px 1fr; gap: 10px; }
      .benefit-row > i { display: none; }
      .device-band, .proof-shell, .free-plan, .cta-box { padding: 24px; }
      .specs, .result-stats { grid-template-columns: 1fr; gap: 12px; }
      .spec { padding-top: 5px; }
      .scene-primary { min-height: 350px; padding: 24px; }
      .scene-card { grid-template-columns: 58px 1fr; padding: 18px; }
      .scene-card-icon { width: 52px; height: 52px; border-radius: 14px; font-size: 1.25rem; }
      .free-plan { gap: 22px; }
      .plan-list li { flex-direction: column; gap: 4px; }
      .faq-answer { padding-right: 5px; }
      .cta-section { padding-bottom: 66px; }
      .copyright { flex-direction: column; margin-top: 34px; }
      .footer-grid { grid-template-columns: 1fr; gap: 28px; }
    }