/* roulang page: index */
:root {
    --bg: #070D1A;
    --bg-elev: #0D1626;
    --primary: #2F80FF;
    --primary-soft: #56A8FF;
    --accent: #3AFFC8;
    --text: #EAF2FF;
    --muted: #9FB0C8;
    --faint: #5F7088;
    --line: rgba(255,255,255,.14);
    --glass: rgba(255,255,255,.05);
    --radius-sm: 10px;
    --radius-md: 18px;
    --radius-lg: 26px;
    --shadow: 0 18px 50px rgba(0,0,0,.3);
    --shadow-blue: 0 12px 36px rgba(30,90,220,.18);
    --space: clamp(72px, 10vw, 110px);
  }

  * {
    box-sizing: border-box;
  }

  html {
    scroll-behavior: smooth;
  }

  body {
    margin: 0;
    background: var(--bg);
    color: var(--text);
    font-family: "PingFang SC", "Microsoft YaHei", "HarmonicOS Sans", "Inter", -apple-system, BlinkMacSystemFont, sans-serif;
    font-size: 16px;
    line-height: 1.7;
    -webkit-font-smoothing: antialiased;
  }

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

  a {
    color: var(--primary-soft);
    text-decoration: none;
    transition: color .25s ease;
  }

  a:hover {
    color: #fff;
  }

  h1, h2, h3, h4 {
    margin: 0;
    line-height: 1.3;
    letter-spacing: .01em;
    color: #fff;
  }

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

  button, input, details, summary {
    font-family: inherit;
  }

  .container {
    max-width: 1200px;
    margin: 0 auto;
    padding-left: 22px;
    padding-right: 22px;
  }

  .section {
    padding-top: var(--space);
    padding-bottom: var(--space);
  }

  .glass-panel {
    background: linear-gradient(135deg, rgba(255,255,255,.075), rgba(255,255,255,.03));
    border: 1px solid rgba(255,255,255,.14);
    border-radius: var(--radius-lg);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    box-shadow: var(--shadow);
    position: relative;
  }

  .glass-panel::before {
    content: "";
    position: absolute;
    left: 16px;
    top: 0;
    width: calc(100% - 32px);
    height: 1px;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,.4), transparent);
    pointer-events: none;
  }

  .smart-label {
    display: inline-flex;
    align-items: center;
    gap: 7px;
    background: rgba(47, 128, 255, .12);
    border: 1px solid rgba(47, 128, 255, .3);
    color: var(--primary-soft);
    font-size: 13px;
    letter-spacing: .04em;
    padding: 5px 14px;
    border-radius: 999px;
  }

  .smart-label .dot {
    width: 6px;
    height: 6px;
    background: var(--accent);
    border-radius: 50%;
  }

  .section-kicker {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    color: var(--primary-soft);
    font-size: 13px;
    font-weight: 600;
    letter-spacing: .10em;
    text-transform: uppercase;
    margin-bottom: 14px;
  }

  .section-title {
    font-size: clamp(27px, 3.4vw, 40px);
    font-weight: 800;
    letter-spacing: .02em;
    line-height: 1.22;
  }

  .section-desc {
    margin-top: 14px;
    color: var(--muted);
    max-width: 780px;
    font-size: 16px;
    line-height: 1.8;
  }

  .btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 9px;
    border-radius: 12px;
    padding: 13px 24px;
    font-size: 15px;
    font-weight: 600;
    letter-spacing: .02em;
    line-height: 1.2;
    border: 1px solid transparent;
    transition: transform .25s ease, box-shadow .25s ease, border-color .25s ease, background .25s ease;
    cursor: pointer;
  }

  .btn-primary {
    background: linear-gradient(135deg, #2F80FF, #2F7CEF);
    border-color: rgba(58, 255, 200, .08);
    color: #fff;
    box-shadow: 0 0 22px rgba(47, 128, 255, .25), 0 12px 30px rgba(47, 128, 255, .16);
  }

  .btn-primary:hover {
    background: linear-gradient(135deg, #3C8CFF, #2F80FF);
    box-shadow: 0 0 34px rgba(47, 128, 255, .5), 0 16px 38px rgba(47, 128, 255, .25);
    transform: translateY(-1px);
    color: #fff;
  }

  .btn-primary:active {
    transform: translateY(1px);
    box-shadow: 0 0 14px rgba(47, 128, 255, .3);
  }

  .btn-ghost {
    background: rgba(255,255,255,.04);
    border-color: rgba(255,255,255,.16);
    color: var(--text);
    backdrop-filter: blur(8px);
  }

  .btn-ghost:hover {
    border-color: rgba(58,255,200,.55);
    box-shadow: 0 0 16px rgba(58, 255, 200, .08);
    color: #fff;
    background: rgba(255,255,255,.07);
    transform: translateY(-1px);
  }

  .btn-sm {
    padding: 9px 16px;
    font-size: 13px;
    border-radius: 10px;
  }

  .btn:focus-visible {
    outline: 2px solid var(--accent);
    outline-offset: 3px;
  }

  .site-header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 50;
    display: flex;
    align-items: center;
    height: 70px;
    background: rgba(7,13,26,.62);
    border-bottom: 1px solid transparent;
    backdrop-filter: blur(16px) saturate(130%);
    -webkit-backdrop-filter: blur(16px) saturate(130%);
    transition: background .3s ease, border-color .3s ease, box-shadow .3s ease, backdrop-filter .3s ease;
  }

  .site-header.is-scrolled {
    background: rgba(7,13,26,.92);
    border-bottom-color: rgba(255,255,255,.08);
    box-shadow: 0 14px 40px rgba(0,0,0,.3);
  }

  .header-inner {
    width: 100%;
    max-width: 1200px;
    padding: 0 22px;
    margin: 0 auto;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
  }

  .header-left {
    display: flex;
    align-items: center;
    gap: 22px;
    min-width: 0;
  }

  .brand-logo {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    flex-shrink: 0;
    color: #fff;
    font-weight: 800;
    font-size: 17px;
    letter-spacing: .01em;
  }

  .brand-logo:hover {
    color: #fff;
  }

  .brand-mark {
    display: inline-flex;
    width: 34px;
    height: 34px;
    border-radius: 10px;
    background: linear-gradient(135deg, #2F80FF 12%, #5BB2FF 48%, #3AFFC8 100%);
    align-items: center;
    justify-content: center;
    box-shadow: 0 0 18px rgba(47,128,255,.35);
    color: #08101F;
  }

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

  .brand-text {
    display: inline-flex;
    align-items: baseline;
    gap: 6px;
  }

  .brand-text em {
    font-style: normal;
    font-size: 12px;
    font-weight: 500;
    color: var(--faint);
    letter-spacing: .02em;
  }

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

  .main-nav a {
    display: inline-flex;
    align-items: center;
    padding: 8px 14px;
    border-radius: 10px;
    color: var(--muted);
    font-size: 15px;
    font-weight: 500;
    transition: color .2s, background .2s;
  }

  .main-nav a:hover {
    color: #fff;
    background: rgba(255,255,255,.06);
  }

  .main-nav a.active {
    color: #fff;
    background: rgba(58,255,200,.12);
    box-shadow: inset 0 0 0 1px rgba(58,255,200,.2);
  }

  .header-right {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-left: auto;
  }

  .header-cta {
    white-space: nowrap;
  }

  .nav-toggle {
    display: none;
    width: 42px;
    height: 42px;
    background: rgba(255,255,255,.05);
    border: 1px solid rgba(255,255,255,.13);
    border-radius: 10px;
    color: var(--text);
    cursor: pointer;
    align-items: center;
    justify-content: center;
  }

  .hamburger-icon {
    display: block;
    width: 20px;
    height: 2px;
    background: currentColor;
    position: relative;
    transition: background .2s;
  }

  .hamburger-icon::before,
  .hamburger-icon::after {
    content: "";
    width: 20px;
    height: 2px;
    position: absolute;
    left: 0;
    background: currentColor;
    transition: transform .25s ease;
  }

  .hamburger-icon::before {
    top: -6px;
  }

  .hamburger-icon::after {
    top: 6px;
  }

  .mobile-nav {
    display: none;
    position: fixed;
    top: 70px;
    right: 18px;
    z-index: 90;
    width: min(290px, 88vw);
    background: rgba(10, 18, 32, .96);
    border: 1px solid rgba(255,255,255,.14);
    border-radius: 18px;
    padding: 12px;
    box-shadow: 0 28px 80px rgba(0,0,0,.5);
    backdrop-filter: blur(24px);
  }

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

  .mobile-nav a {
    display: block;
    padding: 12px 16px;
    border-radius: 12px;
    color: var(--text);
    font-weight: 500;
  }

  .mobile-nav a:hover,
  .mobile-nav a.active {
    background: rgba(255,255,255,.08);
    color: #fff;
  }

  .hero {
    position: relative;
    min-height: calc(100vh - 70px);
    display: flex;
    align-items: center;
    padding-top: 124px;
    padding-bottom: 70px;
    overflow: hidden;
  }

  .hero-bg {
    position: absolute;
    inset: 0;
    background:
      radial-gradient(ellipse at 70% 28%, rgba(47, 128, 255, .16), transparent 46%),
      radial-gradient(ellipse at 16% 80%, rgba(58, 255, 200, .05), transparent 40%),
      linear-gradient(rgba(7, 13, 26, .84), rgba(7, 13, 26, .9)),
      url('/assets/images/backpic/back-1.webp') center 30% / cover no-repeat;
    pointer-events: none;
  }

  .hero-bg::after {
    content: "";
    position: absolute;
    inset: 0;
    opacity: .5;
    background-image:
      linear-gradient(rgba(255,255,255,.025) 1px, transparent 1px),
      linear-gradient(90deg, rgba(255,255,255,.02) 1px, transparent 1px);
    background-size: 56px 56px;
    mask-image: radial-gradient(circle at 50% 10%, black, transparent 70%);
  }

  .hero-content {
    position: relative;
    display: grid;
    grid-template-columns: minmax(0, 1.1fr) minmax(0, .9fr);
    gap: 48px;
    align-items: center;
    width: 100%;
  }

  .hero-copy {
    max-width: 660px;
  }

  .hero-copy h1 {
    font-size: clamp(38px, 5.4vw, 62px);
    line-height: 1.1;
    font-weight: 850;
    letter-spacing: -.01em;
    margin-top: 24px;
    background: linear-gradient(180deg, #FFFFFF 20%, #C8D8FF 92%);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
  }

  .hero-lead {
    font-size: clamp(16px, 2vw, 19px);
    line-height: 1.85;
    color: #BECFE3;
    max-width: 590px;
    margin-top: 24px;
  }

  .hero-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 14px;
    margin-top: 38px;
  }

  .hero-note {
    display: flex;
    flex-wrap: wrap;
    gap: 10px 22px;
    color: var(--faint);
    font-size: 13px;
    margin-top: 22px;
  }

  .hero-visual {
    position: relative;
    min-height: 400px;
    width: 100%;
    display: flex;
    flex-direction: column;
    overflow: hidden;
  }

  .visual-head {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    padding: 17px 20px;
    border-bottom: 1px solid rgba(255,255,255,.08);
  }

  .visual-title {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    font-size: 14px;
    font-weight: 600;
    color: #fff;
  }

  .visual-badge {
    font-size: 12px;
    padding: 3px 12px;
    border-radius: 999px;
    display: inline-flex;
    align-items: center;
    gap: 6px;
    background: rgba(58,255,200,.12);
    border: 1px solid rgba(58,255,200,.28);
    color: #B4FFE6;
  }

  .visual-badge::before {
    content: "";
    width: 5px;
    height: 5px;
    background: var(--accent);
    border-radius: 50%;
  }

  .visual-img {
    flex: 1;
    min-height: 0;
    padding: 0;
  }

  .visual-img img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    min-height: 250px;
  }

  .visual-meta {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 10px;
    padding: 13px 18px;
    border-top: 1px solid rgba(255,255,255,.08);
    font-size: 13px;
    color: var(--muted);
    background: rgba(0,0,0,.12);
  }

  .visual-meta strong {
    color: #fff;
    font-weight: 600;
  }

  .status-line {
    display: flex;
    flex-wrap: wrap;
    gap: 8px 20px;
  }

  .trust-bar {
    position: relative;
    border-block: 1px solid rgba(255,255,255,.07);
    background: rgba(12, 22, 38, .75);
  }

  .trust-inner {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: space-between;
    gap: 18px 40px;
    padding-top: 25px;
    padding-bottom: 25px;
  }

  .trust-item {
    display: flex;
    align-items: center;
    gap: 13px;
    color: var(--muted);
    font-size: 14px;
    line-height: 1.5;
  }

  .trust-icon {
    width: 40px;
    height: 40px;
    display: inline-flex;
    flex: none;
    align-items: center;
    justify-content: center;
    border-radius: 13px;
    background: rgba(255,255,255,.06);
    border: 1px solid rgba(255,255,255,.12);
    color: var(--primary-soft);
  }

  .trust-item strong {
    display: block;
    color: #fff;
    font-size: 15px;
    font-weight: 700;
    margin-bottom: 2px;
  }

  .entry-matrix {
    position: relative;
    padding: 10px 0 100px;
  }

  .entry-grid {
    display: grid;
    grid-template-columns: minmax(0, .86fr) minmax(0, 1.14fr);
    gap: clamp(22px, 4vw, 46px);
    align-items: center;
  }

  .entry-photo {
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-blue);
    position: relative;
  }

  .entry-photo::after {
    content: "";
    position: absolute;
    inset: auto 18px -30px 18px;
    height: 42px;
    background: rgba(47,128,255,.2);
    filter: blur(28px);
    border-radius: 40%;
    z-index: -1;
  }

  .feature-list {
    display: grid;
    gap: 18px;
    margin-top: 20px;
  }

  .feature-row {
    display: flex;
    gap: 14px;
    padding: 12px 0;
  }

  .feature-check {
    display: inline-flex;
    width: 28px;
    height: 28px;
    border-radius: 9px;
    background: rgba(58,255,200,.1);
    border: 1px solid rgba(58,255,200,.25);
    color: var(--accent);
    align-items: center;
    justify-content: center;
    margin-top: 2px;
    flex: none;
  }

  .feature-row h3 {
    color: #fff;
    font-size: 17px;
    font-weight: 700;
  }

  .feature-row p {
    margin-top: 5px;
    font-size: 14px;
    line-height: 1.7;
    color: var(--muted);
  }

  .split-callout {
    background: var(--bg-elev);
    border: 1px solid rgba(255,255,255,.08);
    border-radius: 32px;
    overflow: hidden;
    display: grid;
    grid-template-columns: minmax(0, .95fr) minmax(0, 1.05fr);
  }

  .callout-side {
    padding: clamp(28px, 5vw, 64px);
    background:
      linear-gradient(180deg, rgba(255,255,255,.01), rgba(255,255,255,0)),
      url('/assets/images/coverpic/cover-5.webp') center / cover no-repeat;
    min-height: 310px;
    position: relative;
    isolation: isolate;
  }

  .callout-side::after {
    content: "";
    position: absolute;
    inset: 0;
    background: linear-gradient(180deg, rgba(7,18,34,.2), rgba(7,13,26,.72));
    z-index: -1;
  }

  .callout-main {
    padding: clamp(28px, 5vw, 62px);
  }

  .callout-main h2 {
    font-size: clamp(25px, 3vw, 34px);
    font-weight: 800;
  }

  .link-list {
    list-style: none;
    padding: 0;
    margin: 0;
    display: grid;
    gap: 4px;
  }

  .link-list a {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 14px;
    padding: 14px 14px;
    border-radius: 14px;
    color: #D4E2F5;
    font-size: 16px;
    transition: background .25s, transform .2s;
  }

  .link-list a:hover {
    background: rgba(255,255,255,.05);
    color: #fff;
    transform: translateX(4px);
  }

  .link-list small {
    color: var(--faint);
    font-size: 12px;
    white-space: nowrap;
  }

  .link-arrow {
    color: var(--faint);
    margin-left: auto;
  }

  .compat-check {
    background: linear-gradient(180deg, rgba(10, 19, 36, .94), rgba(8, 15, 29, .98));
    border: 1px solid rgba(255,255,255,.11);
    border-radius: 28px;
    overflow: hidden;
  }

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

  .compat-left {
    padding: clamp(26px, 5vw, 54px);
    border-right: 1px solid rgba(255,255,255,.08);
  }

  .compat-right {
    padding: clamp(26px, 5vw, 54px);
    background: rgba(255,255,255,.025);
  }

  .spec-table {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 14px 22px;
    margin-top: 28px;
  }

  .spec-cell {
    border-bottom: 1px solid rgba(255,255,255,.08);
    padding: 13px 2px 14px;
  }

  .spec-cell .k {
    font-size: 13px;
    color: var(--faint);
  }

  .spec-cell .v {
    color: #fff;
    font-weight: 600;
    font-size: 15px;
    margin-top: 4px;
  }

  .status-pill {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    border-radius: 14px;
    background: rgba(255,255,255,.05);
    border: 1px solid rgba(255,255,255,.12);
    padding: 12px 16px;
    font-size: 14px;
    color: var(--muted);
    margin-top: 18px;
  }

  .status-pill.success {
    box-shadow: inset 0 0 0 1px rgba(58,255,200,.18);
    background: rgba(58,255,200,.05);
    color: #B6FFE2;
  }

  .download-section {
    position: relative;
    text-align: center;
    background:
      radial-gradient(ellipse at 50% 10%, rgba(47,128,255,.11), transparent 55%),
      linear-gradient(180deg, var(--bg) 0%, #081120 100%);
  }

  .download-panel {
    text-align: left;
    max-width: 980px;
    margin: 0 auto;
    padding: clamp(28px, 6vw, 64px);
  }

  .download-grid {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: center;
    gap: 14px;
    margin-top: 30px;
  }

  .download-panel .section-desc {
    margin-left: auto;
    margin-right: auto;
  }

  .meta-strip {
    max-width: 660px;
    margin: 26px auto 0;
    border-top: 1px solid rgba(255,255,255,.09);
    padding-top: 20px;
    color: var(--faint);
    font-size: 13px;
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: center;
    gap: 12px 24px;
  }

  .meta-strip span {
    display: inline-flex;
    align-items: center;
    gap: 6px;
  }

  .meta-strip svg {
    width: 15px;
    height: 15px;
    opacity: .7;
  }

  .news-area {
    background: linear-gradient(180deg, var(--bg) 0%, #0A1424 100%);
    border-top: 1px solid rgba(255,255,255,.06);
    position: relative;
  }

  .news-head {
    display: flex;
    align-items: flex-end;
    justify-content: space-between;
    gap: 18px;
    margin-bottom: 28px;
    flex-wrap: wrap;
  }

  .news-grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 20px;
  }

  .news-card {
    position: relative;
    border-radius: var(--radius-md);
    background: linear-gradient(180deg, rgba(255,255,255,.055), rgba(255,255,255,.018));
    border: 1px solid rgba(255,255,255,.12);
    backdrop-filter: blur(9px);
    overflow: hidden;
    transition: transform .28s ease, border-color .28s ease, box-shadow .28s ease, background .28s;
  }

  .news-card:hover {
    transform: translateY(-4px);
    border-color: rgba(58,255,200,.38);
    box-shadow: 0 12px 42px rgba(20,60,140,.3);
    background: linear-gradient(180deg, rgba(255,255,255,.075), rgba(255,255,255,.03));
  }

  .news-card-body {
    padding: 24px 22px 20px;
    display: flex;
    flex-direction: column;
    min-height: 210px;
  }

  .news-tag {
    display: inline-flex;
    align-items: center;
    background: rgba(47,128,255,.1);
    border: 1px solid rgba(47,128,255,.28);
    color: #83B9FF;
    padding: 3px 11px;
    border-radius: 999px;
    font-size: 12px;
    margin-bottom: 14px;
    width: max-content;
  }

  .news-card h3 {
    font-size: 18px;
    line-height: 1.4;
    color: #fff;
    font-weight: 700;
    margin-bottom: 10px;
    flex: 0 0 auto;
  }

  .news-card p {
    font-size: 14px;
    color: var(--muted);
    line-height: 1.7;
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
  }

  .news-card-meta {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 10px;
    border-top: 1px solid rgba(255,255,255,.08);
    padding: 14px 20px;
    background: rgba(0,0,0,.1);
    font-size: 13px;
    color: var(--faint);
  }

  .news-card-meta .category {
    color: var(--accent);
  }

  .news-card-link::after {
    content: "";
    position: absolute;
    inset: 0;
    z-index: 1;
  }

  .news-empty {
    grid-column: 1 / -1;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 58px 20px;
    border-radius: var(--radius-md);
    border: 1px dashed rgba(255,255,255,.18);
    color: var(--faint);
    background: rgba(255,255,255,.025);
    font-size: 15px;
    line-height: 1.8;
  }

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

  .faq-layout {
    max-width: 860px;
    margin: 0 auto;
    display: grid;
    gap: 14px;
    margin-top: 16px;
  }

  .faq-item {
    background: linear-gradient(180deg, rgba(255,255,255,.035), rgba(255,255,255,.01));
    border: 1px solid rgba(255,255,255,.11);
    border-radius: 18px;
    overflow: hidden;
    transition: border-color .25s;
  }

  .faq-item:hover {
    border-color: rgba(255,255,255,.25);
  }

  .faq-item summary {
    list-style: none;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    padding: 19px 20px;
    color: #fff;
    font-weight: 600;
    font-size: 16px;
    transition: background .25s;
  }

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

  .faq-item summary:hover {
    background: rgba(255,255,255,.04);
  }

  .faq-icon {
    flex: none;
    width: 28px;
    height: 28px;
    border-radius: 8px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    background: rgba(255,255,255,.05);
    border: 1px solid rgba(255,255,255,.2);
    color: var(--accent);
  }

  .faq-content {
    padding: 0 20px 22px;
    color: var(--muted);
    line-height: 1.85;
    font-size: 15px;
  }

  .final-cta {
    background:
      linear-gradient(rgba(7,13,26,.88), rgba(7,13,26,.92)),
      url('/assets/images/backpic/back-2.png') center / cover no-repeat;
    border-top: 1px solid rgba(255,255,255,.06);
    padding-top: clamp(50px, 8vw, 94px);
    padding-bottom: clamp(30px, 3vw, 40px);
  }

  .cta-center {
    text-align: center;
    margin-bottom: 50px;
  }

  .site-footer {
    background: #050B16;
    border-top: 1px solid rgba(255,255,255,.06);
    padding-top: 52px;
    padding-bottom: 34px;
  }

  .footer-top {
    grid-template-columns: minmax(0, 1.3fr) minmax(0, .8fr) minmax(0, .9fr);
    gap: 42px;
    padding-bottom: 30px;
    border-bottom: 1px solid rgba(255,255,255,.08);
  }

  .footer-brand {
    font-size: 20px;
    font-weight: 800;
    color: #fff;
    letter-spacing: .01em;
  }

  .footer-desc {
    font-size: 13px;
    color: var(--faint);
    margin-top: 12px;
    max-width: 350px;
    line-height: 1.8;
  }

  .footer-col h4 {
    color: #fff;
    font-size: 14px;
    font-weight: 700;
    margin-bottom: 16px;
  }

  .footer-col a,
  .footer-col span,
  .footer-col p {
    display: flex;
    align-items: center;
    gap: 8px;
    color: var(--faint);
    font-size: 13px;
    padding: 7px 0;
    text-decoration: none;
    transition: color .25s;
  }

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

  .footer-copy {
    margin-top: 27px;
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: space-between;
    gap: 10px 20px;
    color: #435169;
    font-size: 12px;
  }

  .footer-copy a {
    color: #536882;
  }

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

  @media (max-width: 1080px) {
    .hero-content {
      grid-template-columns: minmax(0, 1fr) minmax(0, .8fr);
      gap: 30px;
    }

    .main-nav {
      display: none;
    }

    .header-cta {
      display: none;
    }

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

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

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

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

  @media (max-width: 760px) {
    .section {
      --space: 62px;
    }

    .hero {
      padding-top: 102px;
      padding-bottom: 46px;
      min-height: auto;
    }

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

    .hero-visual {
      min-height: 300px;
    }

    .hero-copy h1 {
      font-size: clamp(30px, 7vw, 42px);
    }

    .trust-inner {
      justify-content: flex-start;
    }

    .split-callout,
    .compat-inner {
      grid-template-columns: 1fr;
    }

    .compat-left {
      border-right: 0;
      border-bottom: 1px solid rgba(255,255,255,.08);
    }

    .spec-table {
      grid-template-columns: 1fr;
    }

    .download-grid {
      flex-direction: column;
    }

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

    .news-head {
      align-items: flex-start;
    }

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

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

    .brand-text em {
      display: none;
    }
  }

  @media (max-width: 500px) {
    .brand-text {
      font-size: 14px;
    }

    .header-inner {
      padding: 0 14px;
    }

    .container {
      padding-left: 16px;
      padding-right: 16px;
    }

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

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

    .link-list a {
      font-size: 14px;
    }

    .faq-layout {
      margin-top: 0;
    }

    .faq-item summary {
      font-size: 15px;
    }
  }

/* roulang page: article */
:root {
    --bg: #070d1a;
    --bg-soft: #0d1626;
    --bg-panel: #111c30;
    --brand: #2f80ff;
    --brand-light: #56a8ff;
    --accent: #2dd4a7;
    --line: rgba(255, 255, 255, 0.13);
    --line-light: rgba(255, 255, 255, 0.2);
    --text: #eaf2ff;
    --text-soft: #9fb0c8;
    --text-dim: #6b7f9c;
    --radius-sm: 10px;
    --radius-md: 18px;
    --radius-lg: 28px;
    --shadow: 0 22px 60px rgba(2, 10, 24, 0.45), 0 0 40px rgba(47, 128, 255, 0.06);
}

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

html {
    scroll-behavior: smooth;
}

body {
    margin: 0;
    background:
        radial-gradient(circle at 12% 8%, rgba(47, 128, 255, 0.12), transparent 32%),
        radial-gradient(circle at 88% 18%, rgba(45, 212, 167, 0.07), transparent 26%),
        var(--bg);
    color: var(--text);
    font-family: "Inter", "PingFang SC", "HarmonicOS Sans", "Microsoft YaHei", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
    font-size: 16px;
    line-height: 1.7;
    -webkit-font-smoothing: antialiased;
    text-rendering: optimizeLegibility;
}

a {
    color: inherit;
    text-decoration: none;
}

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

button,
input,
textarea,
select {
    font-family: inherit;
    font-size: inherit;
    color: inherit;
    outline: none;
}

p,
h1,
h2,
h3,
h4,
h5,
h6 {
    margin: 0;
}

.container {
    width: 100%;
    max-width: 1240px;
    margin-left: auto;
    margin-right: auto;
    padding-left: 24px;
    padding-right: 24px;
}

@media (max-width: 768px) {
    .container {
        padding-left: 18px;
        padding-right: 18px;
    }
}

.site-header {
    position: sticky;
    top: 0;
    z-index: 60;
    background: rgba(7, 13, 26, 0.74);
    backdrop-filter: blur(18px);
    -webkit-backdrop-filter: blur(18px);
    border-bottom: 1px solid rgba(255, 255, 255, 0.08);
    transition: background 0.35s ease, border-color 0.35s ease;
}

.site-header.is-scrolled {
    background: rgba(5, 9, 18, 0.94);
    border-bottom-color: rgba(255, 255, 255, 0.13);
}

.header-inner {
    display: flex;
    align-items: center;
    min-height: 72px;
    gap: 14px;
}

.header-brand {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    flex-shrink: 0;
    padding: 6px 0;
    margin-right: 16px;
}

.brand-mark {
    width: 34px;
    height: 34px;
    flex-shrink: 0;
    border-radius: 11px;
    background: linear-gradient(145deg, rgba(47, 128, 255, 0.25), rgba(45, 212, 167, 0.15));
    border: 1px solid rgba(92, 164, 255, 0.45);
    box-shadow: 0 0 22px rgba(47, 128, 255, 0.16);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    color: #bfe0ff;
}

.brand-mark svg {
    width: 17px;
    height: 17px;
}

.brand-text {
    font-size: 17px;
    font-weight: 700;
    letter-spacing: 0.02em;
    white-space: nowrap;
    background: linear-gradient(90deg, #ffffff, #c5dbff);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
}

@media (max-width: 520px) {
    .brand-text {
        font-size: 15px;
    }
    .brand-mark {
        width: 30px;
        height: 30px;
        border-radius: 9px;
    }
}

.main-nav {
    display: flex;
    align-items: center;
    gap: 6px;
    margin-left: 8px;
}

.main-nav a {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 8px 16px;
    border-radius: 999px;
    color: #b7c5dd;
    font-size: 14px;
    font-weight: 500;
    letter-spacing: 0.01em;
    line-height: 1.2;
    transition: background 0.24s ease, color 0.24s ease, box-shadow 0.24s ease;
}

.main-nav a:hover {
    color: #ffffff;
    background: rgba(255, 255, 255, 0.09);
}

.main-nav a.active {
    background: rgba(47, 128, 255, 0.18);
    color: #ffffff;
    box-shadow: inset 0 0 0 1px rgba(120, 177, 255, 0.15), 0 0 18px rgba(47, 128, 255, 0.1);
}

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

.btn-nav {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 7px;
    min-height: 40px;
    padding: 0 16px;
    border-radius: 999px;
    background: linear-gradient(135deg, #2f80ff, #28b8e8);
    color: #fff;
    font-size: 13px;
    font-weight: 600;
    letter-spacing: 0.03em;
    white-space: nowrap;
    box-shadow: 0 0 18px rgba(47, 128, 255, 0.18);
    border: 1px solid rgba(255, 255, 255, 0.18);
    transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.btn-nav:hover {
    box-shadow: 0 0 28px rgba(47, 128, 255, 0.35);
    transform: translateY(-1px);
}

.btn-nav:active {
    transform: translateY(0);
    box-shadow: 0 0 14px rgba(47, 128, 255, 0.2);
}

.nav-toggle {
    display: none;
    width: 44px;
    height: 44px;
    align-items: center;
    justify-content: center;
    border-radius: 14px;
    border: 1px solid rgba(255, 255, 255, 0.14);
    background: rgba(255, 255, 255, 0.06);
    cursor: pointer;
    color: #d6e2ff;
    transition: background 0.2s ease, border-color 0.2s ease;
}

.nav-toggle:hover {
    background: rgba(255, 255, 255, 0.12);
    border-color: rgba(255, 255, 255, 0.3);
}

.nav-toggle svg {
    width: 20px;
    height: 20px;
    pointer-events: none;
}

@media (max-width: 1023px) {
    .main-nav {
        position: absolute;
        left: 18px;
        right: 18px;
        top: calc(72px + 8px);
        display: none;
        flex-direction: column;
        align-items: stretch;
        gap: 6px;
        padding: 12px;
        margin: 0;
        background: rgba(9, 17, 31, 0.96);
        border: 1px solid rgba(255, 255, 255, 0.14);
        border-radius: 20px;
        box-shadow: 0 24px 70px rgba(2, 7, 16, 0.6);
    }

    .site-header-open .main-nav {
        display: flex;
    }

    .main-nav a {
        justify-content: flex-start;
        padding: 13px 18px;
        border-radius: 14px;
        font-size: 15px;
    }

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

.header-shadow {
    height: 1px;
}

main {
    display: block;
}

.post-hero {
    position: relative;
    overflow: hidden;
    padding: 74px 0 48px;
    background-image:
        linear-gradient(180deg, rgba(7, 13, 26, 0.5), var(--bg) 90%),
        url('/assets/images/backpic/back-1.webp');
    background-position: center, center;
    background-size: cover, cover;
    background-repeat: no-repeat, no-repeat;
    border-bottom: 1px solid rgba(255, 255, 255, 0.07);
}

.post-hero::before {
    content: '';
    position: absolute;
    inset: 0;
    background: radial-gradient(circle at 70% 30%, rgba(47, 128, 255, 0.13), transparent 44%);
    pointer-events: none;
}

.post-hero .container {
    position: relative;
    z-index: 2;
}

.breadcrumb {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 8px;
    color: var(--text-dim);
    font-size: 13px;
    margin-bottom: 28px;
}

.breadcrumb a {
    color: #b6c7e4;
    transition: color 0.2s ease;
}

.breadcrumb a:hover {
    color: #ffffff;
}

.breadcrumb .sep {
    color: rgba(255, 255, 255, 0.25);
    display: inline-flex;
    align-items: center;
}

.post-header {
    max-width: 940px;
}

.post-kicker {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 7px 14px;
    border-radius: 999px;
    border: 1px solid rgba(86, 168, 255, 0.25);
    background: rgba(47, 128, 255, 0.09);
    color: #8fc0ff;
    font-size: 13px;
    font-weight: 600;
    letter-spacing: 0.03em;
    margin-bottom: 22px;
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
}

.post-kicker svg {
    width: 15px;
    height: 15px;
}

.post-title {
    color: #ffffff;
    font-size: clamp(28px, 4vw, 42px);
    line-height: 1.28;
    font-weight: 800;
    letter-spacing: 0.015em;
    text-wrap: balance;
    margin-bottom: 22px;
}

.post-meta {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 8px 22px;
    color: #9db0c9;
    font-size: 13px;
    margin-top: 10px;
}

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

.post-meta svg {
    width: 15px;
    height: 15px;
    opacity: 0.75;
}

.post-area {
    padding: 64px 0 38px;
}

.article-grid {
    display: grid;
    grid-template-columns: minmax(0, 1fr) 320px;
    gap: 44px;
    align-items: start;
}

.article-card {
    min-width: 0;
}

.prose-body {
    max-width: 820px;
    background: transparent;
    color: #dbe6f6;
    font-size: 16.5px;
    line-height: 1.95;
}

.prose-body > * + * {
    margin-top: 1.25em;
}

.prose-body h1,
.prose-body h2,
.prose-body h3,
.prose-body h4,
.prose-body h5,
.prose-body h6 {
    color: #ffffff;
    line-height: 1.35;
    letter-spacing: 0.015em;
    margin-top: 1.9em;
    margin-bottom: 0.55em;
    font-weight: 700;
}

.prose-body h1 {
    font-size: 30px;
}

.prose-body h2 {
    font-size: 25px;
    padding-bottom: 12px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

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

.prose-body h4,
.prose-body h5 {
    font-size: 17px;
    color: #bfd5f2;
}

.prose-body p {
    margin-top: 0;
    margin-bottom: 1.25em;
}

.prose-body strong {
    color: #ffffff;
    font-weight: 600;
}

.prose-body a {
    color: #63b0ff;
    border-bottom: 1px solid rgba(99, 176, 255, 0.35);
    transition: border-color 0.2s ease, color 0.2s ease;
}

.prose-body a:hover {
    color: #ffffff;
    border-color: rgba(255, 255, 255, 0.7);
}

.prose-body ul,
.prose-body ol {
    padding-left: 1.5em;
    margin: 1.4em 0;
}

.prose-body li {
    margin: 0.55em 0;
    padding-left: 0.2em;
}

.prose-body li::marker {
    color: #56a8ff;
}

.prose-body blockquote {
    border-left: 3px solid rgba(47, 128, 255, 0.8);
    background: rgba(47, 128, 255, 0.07);
    padding: 18px 24px;
    border-radius: 0 18px 18px 0;
    color: #c9d9ef;
    margin: 1.6em 0;
}

.prose-body blockquote p {
    margin-bottom: 0;
}

.prose-body code {
    background: rgba(255, 255, 255, 0.08);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 6px;
    padding: 2px 7px;
    font-size: 0.92em;
    color: #a9d1ff;
    font-family: ui-monospace, "SFMono-Regular", "Menlo", monospace;
}

.prose-body pre {
    background: #0b1424;
    border: 1px solid rgba(255, 255, 255, 0.12);
    border-radius: 18px;
    padding: 20px;
    overflow-x: auto;
}

.prose-body pre code {
    background: transparent;
    border: 0;
    padding: 0;
    color: #c9dcff;
}

.prose-body table {
    width: 100%;
    border-collapse: collapse;
    margin: 1.8em 0;
    font-size: 15px;
    display: block;
    overflow-x: auto;
}

.prose-body th,
.prose-body td {
    border: 1px solid rgba(255, 255, 255, 0.12);
    padding: 10px 14px;
    text-align: left;
}

.prose-body th {
    background: rgba(47, 128, 255, 0.12);
    color: #cfe0ff;
    font-weight: 600;
}

.prose-body img {
    border-radius: 18px;
    border: 1px solid rgba(255, 255, 255, 0.14);
    box-shadow: var(--shadow);
    margin: 2em 0;
}

.prose-body img + em {
    display: block;
    text-align: center;
    color: var(--text-dim);
    font-size: 13px;
    margin-top: -1.2em;
}

.post-tags {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 12px;
    padding: 28px 0 20px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    margin-top: 38px;
}

.post-tags-label {
    font-size: 13px;
    color: var(--text-dim);
    display: inline-flex;
    align-items: center;
    gap: 6px;
}

.post-tags-label svg {
    width: 15px;
    height: 15px;
}

.tag {
    display: inline-flex;
    align-items: center;
    padding: 6px 12px;
    border-radius: 999px;
    background: rgba(47, 128, 255, 0.08);
    border: 1px solid rgba(47, 128, 255, 0.28);
    color: #9fc4f7;
    font-size: 12px;
    letter-spacing: 0.02em;
    transition: background 0.2s ease, border-color 0.2s ease;
}

.tag:hover {
    background: rgba(47, 128, 255, 0.2);
    border-color: rgba(86, 168, 255, 0.55);
    color: #fff;
}

.article-aside {
    display: flex;
    flex-direction: column;
    gap: 22px;
}

.side-card {
    background: linear-gradient(180deg, rgba(255, 255, 255, 0.055), rgba(255, 255, 255, 0.025));
    border: 1px solid rgba(255, 255, 255, 0.14);
    border-radius: 22px;
    padding: 20px;
    box-shadow: 0 18px 48px rgba(2, 10, 24, 0.24);
    backdrop-filter: blur(14px);
    -webkit-backdrop-filter: blur(14px);
    position: relative;
}

.side-card::after {
    content: '';
    position: absolute;
    top: 0;
    left: 20px;
    right: 20px;
    height: 1px;
    background: linear-gradient(90deg, rgba(255, 255, 255, 0.02), rgba(255, 255, 255, 0.4), rgba(255, 255, 255, 0.02));
    border-radius: 100%;
}

.side-card h2,
.side-card .side-title {
    color: #ffffff;
    font-size: 15px;
    font-weight: 650;
    letter-spacing: 0.02em;
    padding-bottom: 14px;
    margin-bottom: 16px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.12);
    display: flex;
    align-items: center;
    gap: 8px;
}

.side-card h2 svg,
.side-card .side-title svg {
    width: 16px;
    height: 16px;
    color: #5599e9;
}

.side-meta-list {
    display: grid;
    gap: 13px;
    margin: 0;
}

.side-meta-list dt {
    font-size: 12px;
    color: var(--text-dim);
    text-transform: uppercase;
    letter-spacing: 0.08em;
    margin-bottom: 2px;
}

.side-meta-list dd {
    margin: 0;
    color: #c9d9ef;
    font-size: 14px;
    line-height: 1.6;
    word-break: break-all;
}

.side-nav {
    display: grid;
    gap: 4px;
}

.side-nav a {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 11px 13px;
    border-radius: 12px;
    color: #b3c6df;
    font-size: 14px;
    transition: background 0.2s ease, color 0.2s ease, transform 0.2s ease;
}

.side-nav a:hover {
    background: rgba(47, 128, 255, 0.12);
    color: #ffffff;
    transform: translateX(3px);
}

.side-nav .side-nav-icon {
    width: 30px;
    height: 30px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border-radius: 9px;
    background: rgba(47, 128, 255, 0.12);
    color: #66a2ee;
}

.side-nav .side-nav-icon svg {
    width: 15px;
    height: 15px;
}

.side-cta {
    position: relative;
    overflow: hidden;
    padding: 22px;
}

.side-cta .cta-bg {
    position: absolute;
    inset: 0;
    background: linear-gradient(145deg, rgba(47, 128, 255, 0.18), rgba(45, 212, 167, 0.08)), url('/assets/images/coverpic/cover-2.png') center/cover no-repeat;
    opacity: 0.35;
}

.side-cta > * {
    position: relative;
}

.side-cta h3 {
    color: #ffffff;
    font-size: 17px;
    margin-bottom: 10px;
}

.side-cta p {
    color: #cbddf4;
    font-size: 13px;
    line-height: 1.75;
    margin-bottom: 18px;
}

.btn-primary,
.btn-main {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    min-height: 46px;
    padding: 0 22px;
    border-radius: 14px;
    background: linear-gradient(135deg, #2f80ff, #45aaff);
    color: #ffffff;
    font-size: 15px;
    font-weight: 600;
    letter-spacing: 0.02em;
    border: 1px solid rgba(255, 255, 255, 0.22);
    box-shadow: 0 8px 30px rgba(47, 128, 255, 0.24);
    cursor: pointer;
    transition: transform 0.2s ease, box-shadow 0.2s ease, background 0.2s ease;
}

.btn-primary:hover,
.btn-main:hover {
    background: linear-gradient(135deg, #3d8aff, #58b2ff);
    box-shadow: 0 12px 40px rgba(47, 128, 255, 0.4);
    transform: translateY(-2px);
}

.btn-primary:active,
.btn-main:active {
    transform: translateY(0) scale(0.98);
    box-shadow: 0 4px 18px rgba(47, 128, 255, 0.2);
}

.btn-primary:focus-visible,
.btn-ghost:focus-visible,
.btn-nav:focus-visible,
.nav-toggle:focus-visible,
.faq-header:focus-visible {
    outline: 2px solid rgba(86, 168, 255, 0.75);
    outline-offset: 3px;
}

.btn-ghost {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    min-height: 46px;
    padding: 0 20px;
    border-radius: 14px;
    border: 1px solid rgba(255, 255, 255, 0.2);
    background: rgba(255, 255, 255, 0.05);
    color: #dbe8fb;
    font-size: 14px;
    font-weight: 550;
    cursor: pointer;
    transition: border-color 0.2s ease, background 0.2s ease, transform 0.2s ease;
}

.btn-ghost:hover {
    background: rgba(255, 255, 255, 0.1);
    border-color: rgba(147, 187, 245, 0.55);
    transform: translateY(-1px);
}

.related-resources {
    padding: 72px 0 40px;
}

.related-resources .section-head {
    display: flex;
    align-items: flex-end;
    justify-content: space-between;
    gap: 20px;
    flex-wrap: wrap;
    margin-bottom: 28px;
}

.related-resources h2 {
    color: #ffffff;
    font-size: 26px;
    font-weight: 750;
    letter-spacing: 0.01em;
}

.related-resources .section-sub {
    color: var(--text-soft);
    font-size: 14px;
}

.resource-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
}

.resource-card {
    border: 1px solid rgba(255, 255, 255, 0.13);
    background: linear-gradient(180deg, rgba(255, 255, 255, 0.05), rgba(255, 255, 255, 0.02));
    border-radius: 24px;
    overflow: hidden;
    min-width: 0;
    transition: border-color 0.3s ease, transform 0.3s ease, box-shadow 0.3s ease;
}

.resource-card:hover {
    border-color: rgba(86, 168, 255, 0.48);
    transform: translateY(-4px);
    box-shadow: 0 22px 52px rgba(2, 10, 24, 0.34);
}

.resource-card .resource-cover {
    position: relative;
    aspect-ratio: 16 / 10;
    overflow: hidden;
    background: #0b1424;
}

.resource-card .resource-cover img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.5s ease;
}

.resource-card:hover .resource-cover img {
    transform: scale(1.04);
}

.resource-body {
    padding: 20px;
}

.resource-card h3 {
    font-size: 17px;
    color: #ffffff;
    font-weight: 650;
    line-height: 1.5;
    margin-bottom: 10px;
    letter-spacing: 0.02em;
}

.resource-card p {
    font-size: 13px;
    color: var(--text-soft);
    line-height: 1.8;
    margin-bottom: 16px;
}

.resource-link {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    color: #71b3ff;
    font-size: 13px;
    font-weight: 600;
}

.resource-link svg {
    width: 14px;
    height: 14px;
    transition: transform 0.2s ease;
}

.resource-link:hover svg {
    transform: translateX(3px);
}

@media (max-width: 950px) {
    .resource-grid {
        grid-template-columns: 1fr 1fr;
    }
}

@media (max-width: 620px) {
    .resource-grid {
        grid-template-columns: 1fr;
    }
}

.page-cta {
    position: relative;
    overflow: hidden;
    margin: 34px 0 64px;
    border-radius: 28px;
    border: 1px solid rgba(255, 255, 255, 0.14);
    background-image:
        linear-gradient(120deg, rgba(12, 22, 40, 0.88), rgba(15, 29, 51, 0.86)),
        url('/assets/images/backpic/back-3.webp');
    background-size: cover;
    background-position: center;
    padding: 52px 54px;
}

.page-cta .cta-content {
    position: relative;
    z-index: 2;
    max-width: 700px;
}

.page-cta h2 {
    color: #ffffff;
    font-size: clamp(23px, 3vw, 32px);
    font-weight: 750;
    line-height: 1.4;
    margin-bottom: 14px;
}

.page-cta p {
    color: #bdcdea;
    font-size: 15px;
    margin-bottom: 24px;
    line-height: 1.85;
}

.cta-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 14px;
    align-items: center;
}

.faq-area {
    padding: 26px 0 70px;
}

.faq-title {
    color: #ffffff;
    font-size: 27px;
    font-weight: 750;
    margin-bottom: 12px;
}

.faq-desc {
    color: var(--text-soft);
    font-size: 15px;
    margin-bottom: 26px;
}

.faq-list {
    max-width: 980px;
    display: grid;
    gap: 12px;
}

.faq-item {
    border-radius: 18px;
    border: 1px solid rgba(255, 255, 255, 0.13);
    background: rgba(255, 255, 255, 0.04);
    overflow: hidden;
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    transition: border-color 0.2s ease, background 0.2s ease;
}

.faq-item:hover {
    border-color: rgba(255, 255, 255, 0.24);
}

.faq-item.open {
    border-color: rgba(86, 168, 255, 0.5);
    background: rgba(47, 128, 255, 0.07);
}

.faq-header {
    display: flex;
    align-items: center;
    gap: 14px;
    width: 100%;
    padding: 19px 22px;
    background: transparent;
    border: none;
    color: #e5eefa;
    font-size: 16px;
    font-weight: 600;
    letter-spacing: 0.02em;
    cursor: pointer;
    text-align: left;
    line-height: 1.5;
}

.faq-num {
    font-size: 12px;
    color: #69b0ff;
    background: rgba(47, 128, 255, 0.2);
    border-radius: 999px;
    padding: 2px 9px;
    flex-shrink: 0;
    font-weight: 600;
}

.faq-icon {
    margin-left: auto;
    width: 28px;
    height: 28px;
    border-radius: 8px;
    background: rgba(255, 255, 255, 0.07);
    position: relative;
    flex-shrink: 0;
}

.faq-icon::before,
.faq-icon::after {
    content: '';
    position: absolute;
    background: #8cb8e8;
    border-radius: 2px;
    inset: 0;
    margin: auto;
    width: 12px;
    height: 2px;
}

.faq-icon::after {
    transform: rotate(90deg);
    transition: transform 0.3s ease;
}

.faq-item.open .faq-icon::after {
    transform: rotate(0deg);
}

.faq-body {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.34s ease;
}

.faq-inner {
    padding: 0 22px 20px 53px;
    color: var(--text-soft);
    font-size: 14px;
    line-height: 1.85;
}

.faq-inner p {
    margin: 0 0 6px;
}

.not-found-box {
    min-height: calc(100vh - 300px);
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 110px 24px;
}

.not-found-inner {
    max-width: 520px;
    text-align: center;
    background: rgba(255, 255, 255, 0.045);
    border: 1px solid rgba(255, 255, 255, 0.15);
    padding: 44px 34px;
    border-radius: 28px;
    backdrop-filter: blur(14px);
    -webkit-backdrop-filter: blur(14px);
}

.not-found-inner h1 {
    color: #ffffff;
    font-size: 28px;
    margin-bottom: 16px;
}

.not-found-inner p {
    color: var(--text-soft);
    margin-bottom: 24px;
}

.site-footer {
    border-top: 1px solid rgba(255, 255, 255, 0.08);
    background: #050a13;
    padding: 64px 0 20px;
    margin-top: 40px;
}

.footer-top {
    grid-template-columns: 1.5fr 1fr 1fr;
    gap: 44px;
    padding-bottom: 34px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.footer-brand {
    font-size: 20px;
    font-weight: 750;
    color: #ffffff;
    letter-spacing: 0.02em;
    margin-bottom: 12px;
}

.footer-desc {
    color: var(--text-soft);
    font-size: 14px;
    line-height: 1.9;
    max-width: 380px;
}

.footer-col {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.footer-col h4 {
    color: #bfd3f0;
    font-size: 15px;
    font-weight: 600;
    margin-bottom: 4px;
    letter-spacing: 0.03em;
}

.footer-col a {
    color: #8ca1bd;
    font-size: 14px;
    transition: color 0.2s ease, transform 0.2s ease;
}

.footer-col a:hover {
    color: #ffffff;
    transform: translateX(3px);
}

.footer-col span {
    color: #7288a5;
    font-size: 13px;
    line-height: 1.9;
}

.footer-copy {
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 14px;
    color: #68809f;
    font-size: 13px;
    padding-top: 24px;
}

@media (max-width: 1023px) {
    .header-inner {
        min-height: 66px;
    }
    .post-hero {
        padding-top: 48px;
    }
    .post-area {
        padding-top: 38px;
    }
    .article-grid {
        grid-template-columns: 1fr;
        gap: 40px;
    }
    .article-aside {
        display: grid;
        grid-template-columns: repeat(2, 1fr);
    }
    .article-aside .side-cta {
        grid-column: 1 / -1;
    }
    .footer-top {
        grid-template-columns: 1fr 1fr;
        gap: 34px;
    }
    .footer-desc {
        max-width: none;
    }
}

@media (max-width: 640px) {
    .article-aside {
        display: flex;
        flex-direction: column;
    }
    .footer-top {
        grid-template-columns: 1fr;
        gap: 26px;
    }
    .footer-copy {
        justify-content: center;
        text-align: center;
    }
    .page-cta {
        padding: 38px 24px;
    }
}

.skip-link {
    position: absolute;
    left: -9999px;
    top: 0;
    background: var(--brand);
    color: #fff;
    padding: 10px 18px;
    border-radius: 0 0 12px 0;
    z-index: 100;
}

.skip-link:focus {
    left: 0;
}

:focus {
    outline: 2px solid rgba(86, 168, 255, 0.45);
    outline-offset: 2px;
}

/* roulang page: category1 */
:root {
  --bg: #070d1a;
  --bg-soft: #0d1626;
  --panel: rgba(255, 255, 255, 0.05);
  --panel-strong: rgba(255, 255, 255, 0.08);
  --border: rgba(255, 255, 255, 0.13);
  --border-soft: rgba(255, 255, 255, 0.07);
  --primary: #2f80ff;
  --primary-light: #63b7ff;
  --accent: #3affc8;
  --accent-deep: #1fb992;
  --warning: #f4b45a;
  --text: #eef4ff;
  --muted: #9fb1c9;
  --weak: #66778f;
  --radius-s: 10px;
  --radius-m: 18px;
  --radius-l: 28px;
  --shadow: 0 18px 50px rgba(2, 8, 20, 0.36);
  --glow: 0 0 24px rgba(47, 128, 255, 0.3);
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: "PingFang SC", "Microsoft YaHei", "HarmonyOS Sans SC", "Segoe UI", Roboto, system-ui, sans-serif;
  background-color: var(--bg);
  background-image:
    radial-gradient(circle at 14% 8%, rgba(47, 128, 255, 0.16), transparent 26rem),
    radial-gradient(circle at 86% 16%, rgba(58, 255, 200, 0.09), transparent 22rem),
    repeating-linear-gradient(0deg, rgba(255, 255, 255, 0.02) 0px, rgba(255, 255, 255, 0.02) 1px, transparent 1px, transparent 80px),
    repeating-linear-gradient(90deg, rgba(255, 255, 255, 0.02) 0px, rgba(255, 255, 255, 0.02) 1px, transparent 1px, transparent 80px);
  background-attachment: fixed;
  color: var(--text);
  line-height: 1.8;
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

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

a {
  color: inherit;
  text-decoration: none;
}

button {
  font-family: inherit;
  cursor: pointer;
}

ul,
ol {
  list-style: none;
}

.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 clamp(20px, 4vw, 40px);
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(8, 14, 27, 0.72);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border-soft);
  transition: background 0.3s ease, border-color 0.3s ease, box-shadow 0.3s ease;
}

.site-header.is-scrolled {
  background: rgba(6, 11, 22, 0.9);
  border-bottom-color: rgba(255, 255, 255, 0.09);
  box-shadow: 0 16px 40px rgba(0, 0, 0, 0.25);
}

.header-inner {
  display: flex;
  align-items: center;
  gap: 22px;
  min-height: 72px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
  font-size: 17px;
  font-weight: 800;
  letter-spacing: 0.01em;
  color: #fff;
  transition: opacity 0.2s ease;
}

.brand:hover {
  opacity: 0.86;
}

.brand-icon {
  width: 36px;
  height: 36px;
  border-radius: 10px;
  position: relative;
  display: grid;
  place-items: center;
  background: linear-gradient(145deg, rgba(47, 128, 255, 0.2), rgba(58, 255, 200, 0.14));
  border: 1px solid rgba(99, 183, 255, 0.3);
  color: #7fc7ff;
}

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

.brand-text {
  white-space: nowrap;
}

.main-nav {
  display: flex;
  align-items: center;
  gap: 6px;
  margin-left: 10px;
}

.nav-link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 40px;
  padding: 0 18px;
  border-radius: 999px;
  border: 1px solid transparent;
  font-size: 15px;
  font-weight: 500;
  color: var(--muted);
  letter-spacing: 0.01em;
  transition: color 0.2s ease, background 0.2s ease, border-color 0.2s ease;
}

.nav-link:hover {
  color: #fff;
  background: rgba(255, 255, 255, 0.06);
}

.nav-link.active,
.nav-link[aria-current="page"] {
  color: #fff;
  background: rgba(47, 128, 255, 0.16);
  border-color: rgba(99, 183, 255, 0.3);
}

.header-action {
  margin-left: auto;
  display: flex;
  align-items: center;
  gap: 12px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  border: 0;
  border-radius: 999px;
  font-weight: 600;
  font-family: inherit;
  transition: transform 0.2s ease, box-shadow 0.2s ease, border-color 0.2s ease, background 0.2s ease, opacity 0.2s ease;
  text-align: center;
  cursor: pointer;
  letter-spacing: 0.01em;
}

.btn-primary {
  background: linear-gradient(135deg, #2f80ff, #42a5ff);
  color: #fff;
  box-shadow: 0 12px 26px rgba(47, 128, 255, 0.24), inset 0 1px 0 rgba(255, 255, 255, 0.2);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 16px 36px rgba(47, 128, 255, 0.38), inset 0 1px 0 rgba(255, 255, 255, 0.2);
}

.btn-primary:active {
  transform: translateY(0);
  box-shadow: 0 6px 16px rgba(47, 128, 255, 0.24);
}

.btn-ghost {
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--border);
  color: var(--text);
}

.btn-ghost:hover {
  border-color: rgba(99, 183, 255, 0.5);
  background: rgba(255, 255, 255, 0.08);
  transform: translateY(-2px);
}

.btn-sm {
  min-height: 40px;
  padding: 0 18px;
  font-size: 14px;
}

.btn:focus-visible,
.nav-link:focus-visible,
.nav-toggle:focus-visible {
  outline: 2px solid var(--primary-light);
  outline-offset: 3px;
}

.nav-toggle {
  display: none;
  width: 44px;
  height: 44px;
  border-radius: 10px;
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid var(--border-soft);
  position: relative;
  align-items: center;
  justify-content: center;
}

.nav-toggle span,
.nav-toggle span::before,
.nav-toggle span::after {
  content: "";
  display: block;
  width: 18px;
  height: 2px;
  background: #fff;
  border-radius: 2px;
  position: absolute;
  left: 12px;
  transition: transform 0.25s ease, opacity 0.25s ease;
}

.nav-toggle span {
  top: 21px;
}

.nav-toggle span::before {
  top: -6px;
}

.nav-toggle span::after {
  top: 6px;
}

.nav-toggle[aria-expanded="true"] span {
  background: transparent;
}

.nav-toggle[aria-expanded="true"] span::before {
  transform: translateY(6px) rotate(45deg);
}

.nav-toggle[aria-expanded="true"] span::after {
  transform: translateY(-6px) rotate(-45deg);
}

.page-banner {
  position: relative;
  border-bottom: 1px solid rgba(255, 255, 255, 0.07);
  background-color: var(--bg-soft);
  background-image: linear-gradient(180deg, rgba(7, 13, 26, 0.9), rgba(9, 16, 30, 0.97)), url('/assets/images/backpic/back-1.webp');
  background-size: cover;
  background-position: center 30%;
}

.banner-inner {
  padding: 72px 0 52px;
}

.crumb {
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--weak);
  font-size: 13px;
  margin-bottom: 20px;
  flex-wrap: wrap;
}

.crumb a {
  color: var(--muted);
  transition: color 0.2s ease;
}

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

.crumb-sep {
  opacity: 0.5;
}

.page-title {
  font-size: clamp(32px, 5vw, 48px);
  line-height: 1.24;
  letter-spacing: -0.01em;
  font-weight: 800;
  max-width: 780px;
  color: #fff;
}

.banner-lead {
  margin-top: 20px;
  font-size: 16px;
  line-height: 1.9;
  max-width: 680px;
  color: var(--muted);
}

.banner-badges {
  margin-top: 24px;
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  min-height: 30px;
  padding: 0 14px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.12);
  color: var(--muted);
  font-size: 13px;
}

.badge::before {
  content: "";
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 10px rgba(58, 255, 200, 0.7);
}

.badge.blue::before {
  background: var(--primary-light);
  box-shadow: 0 0 10px rgba(47, 128, 255, 0.7);
}

.quick-area {
  padding: 28px 0 16px;
}

.quick-card {
  display: flex;
  align-items: center;
  gap: 14px;
  flex-wrap: wrap;
  padding: 18px 20px;
  border: 1px solid var(--border-soft);
  border-radius: var(--radius-m);
  background: rgba(255, 255, 255, 0.045);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.04);
}

.quick-label {
  font-weight: 600;
  color: #fff;
  font-size: 14px;
  letter-spacing: 0.02em;
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

.quick-label i {
  width: 8px;
  height: 8px;
  border-radius: 2px;
  background: linear-gradient(135deg, var(--primary), var(--accent));
  display: inline-block;
}

.quick-links {
  display: flex;
  flex: 1;
  flex-wrap: wrap;
  gap: 8px;
}

.quick-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  border: 1px solid rgba(255, 255, 255, 0.09);
  background: rgba(255, 255, 255, 0.04);
  border-radius: 999px;
  padding: 7px 14px;
  min-height: 38px;
  color: var(--muted);
  font-size: 14px;
  transition: all 0.2s ease;
}

.quick-link span {
  color: var(--primary-light);
  font-size: 12px;
  font-weight: 700;
}

.quick-link:hover {
  color: #fff;
  border-color: rgba(99, 183, 255, 0.35);
  background: rgba(47, 128, 255, 0.12);
  transform: translateY(-1px);
}

.main {
  flex: 1;
}

.split-section {
  padding: 70px 0 30px;
}

.split-row {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  gap: 58px;
  align-items: center;
  padding: 40px 0 56px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.07);
}

.split-row.flip .split-copy {
  order: 2;
}

.split-row.flip .split-media {
  order: 1;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.08em;
  color: var(--accent);
  text-transform: uppercase;
  margin-bottom: 12px;
}

.eyebrow::before {
  content: "";
  width: 18px;
  height: 2px;
  background: var(--accent);
  border-radius: 2px;
  box-shadow: 0 0 12px rgba(58, 255, 200, 0.5);
}

.eyebrow.blue {
  color: var(--primary-light);
}

.eyebrow.blue::before {
  background: var(--primary-light);
  box-shadow: 0 0 12px rgba(47, 128, 255, 0.5);
}

.section-title {
  font-size: clamp(24px, 3.2vw, 32px);
  line-height: 1.35;
  font-weight: 800;
  color: #fff;
  letter-spacing: -0.01em;
  margin-bottom: 18px;
}

.section-copy p {
  color: var(--muted);
  font-size: 15px;
  line-height: 1.9;
  margin-bottom: 16px;
}

.module-list {
  display: grid;
  gap: 16px;
  margin-top: 24px;
}

.module-item {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 14px 16px;
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: var(--radius-s);
  transition: background 0.2s ease, transform 0.2s ease;
}

.module-item:hover {
  background: rgba(255, 255, 255, 0.06);
  transform: translateX(2px);
}

.module-mark {
  display: grid;
  place-items: center;
  width: 24px;
  height: 24px;
  flex-shrink: 0;
  border-radius: 50%;
  background: rgba(47, 128, 255, 0.2);
  color: var(--accent);
  font-size: 13px;
  border: 1px solid rgba(58, 255, 200, 0.4);
}

.module-text {
  font-size: 15px;
  line-height: 1.8;
  color: var(--muted);
}

.module-text strong {
  display: block;
  color: #e7f0ff;
  font-weight: 600;
  font-size: 15px;
  margin-bottom: 2px;
}

.media-frame {
  position: relative;
  padding: 12px;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.13);
  border-radius: var(--radius-l);
  box-shadow: var(--shadow);
}

.media-frame::after {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: inherit;
  pointer-events: none;
  background: linear-gradient(160deg, rgba(255, 255, 255, 0.1), transparent 40%);
}

.media-frame img {
  width: 100%;
  aspect-ratio: 16 / 10;
  object-fit: cover;
  border-radius: 18px;
  background: #0a1222;
}

.media-caption {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 14px;
  padding: 14px 16px 4px;
}

.media-caption span {
  font-size: 13px;
  color: var(--weak);
}

.media-caption em {
  font-style: normal;
  font-size: 12px;
  color: var(--primary-light);
  border: 1px solid rgba(99, 183, 255, 0.24);
  background: rgba(47, 128, 255, 0.1);
  border-radius: 999px;
  padding: 2px 10px;
  white-space: nowrap;
}

.flow-steps {
  margin-top: 26px;
  counter-reset: flow;
  border-top: 1px solid rgba(255, 255, 255, 0.07);
}

.flow-step {
  display: flex;
  align-items: flex-start;
  gap: 16px;
  padding: 16px 4px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
}

.flow-step-num {
  counter-increment: flow;
  width: 32px;
  height: 32px;
  flex-shrink: 0;
  display: grid;
  place-items: center;
  border-radius: 10px;
  background: rgba(47, 128, 255, 0.14);
  border: 1px solid rgba(47, 128, 255, 0.28);
  color: var(--primary-light);
  font-size: 14px;
  font-weight: 700;
}

.flow-step-num::before {
  content: counter(flow, decimal-leading-zero);
}

.flow-body strong {
  display: block;
  font-size: 15px;
  font-weight: 600;
  color: #eef4ff;
  line-height: 1.6;
  margin-bottom: 4px;
}

.flow-body p {
  color: var(--muted);
  font-size: 14px;
  line-height: 1.8;
}

.notice-panel {
  display: flex;
  align-items: flex-start;
  gap: 16px;
  margin-top: 22px;
  padding: 20px;
  border-radius: var(--radius-m);
  background: rgba(244, 180, 90, 0.08);
  border: 1px solid rgba(244, 180, 90, 0.2);
}

.notice-panel .notice-icon {
  width: 28px;
  height: 28px;
  flex-shrink: 0;
  border-radius: 50%;
  display: grid;
  place-items: center;
  background: rgba(244, 180, 90, 0.16);
  color: var(--warning);
  font-weight: 700;
}

.notice-panel h3 {
  font-size: 15px;
  font-weight: 600;
  color: #ffe0af;
  line-height: 1.5;
  margin-bottom: 6px;
}

.notice-panel p {
  font-size: 14px;
  line-height: 1.8;
  color: #c9b594;
  margin-bottom: 0;
}

.security-block {
  margin: 24px 0 0;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
}

.secure-item {
  padding: 18px;
  border: 1px solid rgba(255, 255, 255, 0.09);
  border-radius: var(--radius-m);
  background: rgba(255, 255, 255, 0.035);
  position: relative;
  transition: border-color 0.2s ease, background 0.2s ease, transform 0.2s ease;
}

.secure-item:hover {
  border-color: rgba(58, 255, 200, 0.28);
  background: rgba(58, 255, 200, 0.04);
  transform: translateY(-2px);
}

.secure-index {
  font-size: 13px;
  color: var(--accent);
  font-weight: 700;
  display: block;
  margin-bottom: 10px;
  letter-spacing: 0.06em;
}

.secure-item h3 {
  font-size: 16px;
  font-weight: 600;
  color: #fff;
  margin-bottom: 8px;
  line-height: 1.5;
}

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

.entry-footer {
  padding: 64px 0 80px;
}

.entry-nav-card {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  flex-wrap: wrap;
  padding: 24px;
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: var(--radius-l);
  background: rgba(255, 255, 255, 0.05);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.05);
}

.entry-nav-main {
  min-width: 0;
}

.entry-nav-kicker {
  font-size: 13px;
  color: var(--weak);
  margin-bottom: 6px;
}

.entry-nav-link {
  font-size: 16px;
  font-weight: 600;
  color: #fff;
  display: inline-flex;
  align-items: center;
  gap: 10px;
  transition: color 0.2s ease;
}

.entry-nav-link span {
  color: var(--accent);
  font-size: 18px;
}

.entry-nav-link:hover {
  color: var(--primary-light);
}

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

.site-footer {
  margin-top: auto;
  background: linear-gradient(180deg, rgba(10, 17, 31, 0.9), #050a14);
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  padding: 64px 0 28px;
}

.footer-top {
  display: grid;
  grid-template-columns: 1.5fr 0.9fr 1fr;
  gap: 48px;
  padding-bottom: 46px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.07);
}

.footer-brand {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 18px;
  font-weight: 800;
  color: #fff;
  margin-bottom: 14px;
}

.footer-desc {
  color: var(--muted);
  font-size: 14px;
  line-height: 1.85;
  max-width: 340px;
  margin: 0;
}

.footer-col {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 10px;
}

.footer-col h4 {
  color: #fff;
  font-size: 15px;
  font-weight: 600;
  margin-bottom: 8px;
}

.footer-col a,
.footer-col span {
  color: var(--muted);
  font-size: 14px;
  line-height: 1.6;
  transition: color 0.2s ease;
}

.footer-col a:hover {
  color: var(--primary-light);
}

.footer-copy {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
  padding-top: 24px;
  color: var(--weak);
  font-size: 13px;
}

@media (max-width: 1024px) {
  .split-row {
    gap: 36px;
  }

  .security-block {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 940px) {
  .header-inner {
    flex-wrap: wrap;
    min-height: 0;
    padding-top: 12px;
    padding-bottom: 12px;
  }

  .brand {
    margin-right: 0;
  }

  .main-nav {
    order: 4;
    flex-basis: 100%;
    margin-left: 0;
    display: none;
    flex-direction: column;
    align-items: stretch;
    gap: 8px;
    background: rgba(8, 14, 27, 0.96);
    padding: 12px;
    border-radius: var(--radius-m);
    border: 1px solid rgba(255, 255, 255, 0.09);
    box-shadow: var(--shadow);
  }

  .main-nav.open {
    display: flex;
  }

  .nav-link {
    justify-content: flex-start;
    padding: 0 14px;
    min-height: 44px;
  }

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

  .header-action {
    margin-left: auto;
  }

  .banner-inner {
    padding: 54px 0 42px;
  }

  .split-row,
  .split-row.flip {
    grid-template-columns: 1fr;
    padding: 16px 0 44px;
    gap: 28px;
  }

  .split-row.flip .split-copy,
  .split-row.flip .split-media {
    order: unset;
  }

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

@media (max-width: 640px) {
  .quick-links {
    flex-direction: column;
    align-items: stretch;
  }

  .quick-link {
    justify-content: flex-start;
  }

  .page-title {
    font-size: 32px;
  }

  .footer-top {
    grid-template-columns: 1fr;
    gap: 32px;
  }

  .entry-nav-card {
    flex-direction: column;
    align-items: flex-start;
  }

  .entry-nav-actions a {
    flex: 1;
  }
}

@media (max-width: 480px) {
  .banner-inner {
    padding-top: 42px;
  }

  .page-title {
    font-size: 28px;
  }

  .banner-lead {
    font-size: 15px;
  }

  .section-title {
    font-size: 22px;
  }

  .header-action .btn-sm {
    padding: 0 14px;
    font-size: 13px;
  }

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

  .brand-icon {
    width: 32px;
    height: 32px;
  }

  .footer-copy {
    flex-direction: column;
    justify-content: flex-start;
    align-items: flex-start;
  }

  .media-frame {
    border-radius: 18px;
    padding: 8px;
  }

  .media-frame img {
    border-radius: 13px;
  }
}

/* roulang page: category2 */
:root {
  --bg: #070d1a;
  --bg-deep: #040912;
  --surface: #0c1527;
  --surface-2: #101c30;
  --glass: rgba(255, 255, 255, .045);
  --glass-strong: rgba(255, 255, 255, .08);
  --line: rgba(163, 190, 255, .15);
  --line-soft: rgba(163, 190, 255, .1);
  --primary: #3d8bff;
  --primary-light: #64aeff;
  --accent: #3affc8;
  --accent-2: #26d9a6;
  --text-main: #eaf2ff;
  --text-body: #c6d5f0;
  --text-dim: #96a9c8;
  --text-faint: #6b7c99;
  --radius-sm: 8px;
  --radius-md: 16px;
  --radius-lg: 24px;
  --shadow-blue: 0 18px 62px rgba(12, 45, 125, .28);
  --font-cn: "PingFang SC", "Microsoft YaHei", "HarmonicOS Sans", "Source Han Sans SC", "Inter", sans-serif;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--text-body);
  font-family: var(--font-cn);
  font-size: 16px;
  line-height: 1.8;
  background-image:
    radial-gradient(1100px 360px at 82% -8%, rgba(47, 128, 255, .16), transparent 60%),
    radial-gradient(920px 420px at -10% 38%, rgba(58, 255, 200, .06), transparent 60%);
  -webkit-font-smoothing: antialiased;
}

::selection {
  background: rgba(64, 143, 255, .35);
  color: #fff;
}

a {
  color: var(--primary-light);
  text-decoration: none;
  transition: color .2s ease;
}

a:hover {
  color: #fff;
}

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

p {
  margin: 0;
}

h1, h2, h3, h4 {
  margin: 0;
  color: var(--text-main);
  line-height: 1.3;
  font-weight: 700;
}

button {
  font: inherit;
  color: inherit;
  background: none;
  border: 0;
}

.container {
  width: min(1200px, 100% - 48px);
  margin-inline: auto;
}

.skip-link {
  position: fixed;
  left: 16px;
  top: -100px;
  z-index: 100;
  background: var(--primary);
  color: #fff;
  padding: 10px 18px;
  border-radius: 10px;
  font-size: 14px;
  transition: top .2s ease;
}

.skip-link:focus {
  top: 16px;
  color: #fff;
}

/* Header */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  padding: 14px 0;
  background: rgba(7, 13, 26, .62);
  border-bottom: 1px solid transparent;
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
  transition: background .3s ease, border-color .3s ease, box-shadow .3s ease;
}

.site-header.is-scrolled {
  background: rgba(7, 13, 26, .9);
  border-bottom-color: var(--line-soft);
  box-shadow: 0 10px 34px rgba(0, 0, 0, .22);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
}

.brand-logo {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: #fff;
  font-size: 1.05rem;
  font-weight: 800;
  letter-spacing: .01em;
  line-height: 1.3;
  min-width: 0;
}

.brand-logo:hover {
  color: #fff;
}

.brand-mark {
  flex: 0 0 36px;
  width: 36px;
  height: 36px;
  display: grid;
  place-items: center;
  border-radius: 11px;
  background: linear-gradient(140deg, rgba(58, 255, 200, .22), rgba(61, 139, 255, .85));
  border: 1px solid rgba(255, 255, 255, .28);
  box-shadow: 0 0 24px rgba(61, 139, 255, .38);
  font-size: 1rem;
  color: #fff;
  padding-bottom: 1px;
  letter-spacing: -0.02em;
}

.header-actions {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 14px;
  min-width: 0;
}

.main-nav {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 5px;
  border-radius: 999px;
  background: rgba(255, 255, 255, .035);
  border: 1px solid rgba(255, 255, 255, .09);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
}

.main-nav a {
  display: inline-block;
  padding: 8px 15px;
  border-radius: 999px;
  color: var(--text-dim);
  font-size: .92rem;
  font-weight: 500;
  letter-spacing: .02em;
  white-space: nowrap;
  transition: all .22s ease;
}

.main-nav a:hover {
  color: #fff;
  background: rgba(255, 255, 255, .1);
}

.main-nav a.active {
  color: #fff;
  background: rgba(255, 255, 255, .16);
  box-shadow: inset 0 0 0 1px rgba(255, 255, 255, .1);
}

.nav-cta {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 9px 18px;
  border-radius: 999px;
  font-size: .9rem;
  font-weight: 600;
  color: #eaf6ff;
  background: linear-gradient(135deg, rgba(58, 255, 200, .12), rgba(61, 139, 255, .2));
  border: 1px solid rgba(100, 174, 255, .45);
  transition: all .22s ease;
  white-space: nowrap;
}

.nav-cta:hover {
  color: #fff;
  border-color: var(--primary-light);
  box-shadow: 0 0 24px rgba(61, 139, 255, .3);
}

.nav-toggle {
  display: none;
  width: 44px;
  height: 44px;
  border-radius: 12px;
  border: 1px solid var(--line-soft);
  background: rgba(255, 255, 255, .04);
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 5px;
  cursor: pointer;
  transition: border-color .2s, background .2s;
}

.nav-toggle span {
  display: block;
  width: 18px;
  height: 2px;
  border-radius: 2px;
  background: #dceaff;
  transition: transform .2s ease, opacity .2s ease;
}

.nav-toggle:hover {
  border-color: rgba(100, 174, 255, .4);
  background: rgba(255, 255, 255, .08);
}

@media (max-width: 1023.98px) {
  .nav-toggle {
    display: inline-flex;
  }

  .main-nav {
    display: none;
    flex-direction: column;
    align-items: stretch;
    gap: 4px;
    position: absolute;
    top: calc(100% + 8px);
    left: 14px;
    right: 14px;
    z-index: 60;
    padding: 12px;
    border-radius: 18px;
    background: rgba(7, 13, 26, .94);
    border: 1px solid rgba(163, 190, 255, .2);
    box-shadow: 0 24px 60px rgba(0, 0, 0, .36);
  }

  .main-nav.is-open {
    display: flex;
  }

  .main-nav a {
    display: block;
    padding: 13px 18px;
    border-radius: 12px;
    font-size: 1rem;
  }

  .nav-cta {
    display: none;
  }
}

/* Hero */
.entry-hero {
  position: relative;
  padding: 96px 0 80px;
  overflow: hidden;
  border-bottom: 1px solid var(--line-soft);
  background:
    radial-gradient(760px 340px at 85% 20%, rgba(58, 255, 200, .09), transparent 62%),
    radial-gradient(760px 360px at 14% 8%, rgba(61, 139, 255, .18), transparent 62%),
    rgba(6, 11, 24, .55);
}

.entry-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  opacity: .16;
  background-image:
    linear-gradient(rgba(163, 190, 255, .12) 1px, transparent 1px),
    linear-gradient(90deg, rgba(163, 190, 255, .1) 1px, transparent 1px);
  background-size: 56px 56px;
  mask-image: radial-gradient(circle at 30% 10%, black, transparent 62%);
  -webkit-mask-image: radial-gradient(circle at 30% 10%, black, transparent 62%);
}

.entry-hero__inner {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1.08fr) minmax(0, .92fr);
  gap: 52px;
  align-items: center;
}

.pill {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  background: rgba(20, 35, 68, .65);
  border: 1px solid rgba(100, 174, 255, .24);
  border-radius: 999px;
  padding: 7px 15px;
  color: #c9dcff;
  font-size: .86rem;
  line-height: 1.4;
  margin-bottom: 24px;
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, .06);
}

.pulse-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 0 0 rgba(58, 255, 200, .6);
  animation: pulse 1.9s infinite;
}

@keyframes pulse {
  0% { box-shadow: 0 0 0 0 rgba(58, 255, 200, .5); }
  65% { box-shadow: 0 0 0 8px rgba(58, 255, 200, 0); }
  100% { box-shadow: 0 0 0 0 rgba(58, 255, 200, 0); }
}

.entry-hero h1 {
  font-size: clamp(2.1rem, 3.4vw, 3.15rem);
  font-weight: 800;
  line-height: 1.24;
  letter-spacing: .01em;
  max-width: 13em;
  margin-bottom: 24px;
}

.entry-hero h1 .gradient-text {
  background: linear-gradient(100deg, #fff 20%, var(--primary-light) 60%, var(--accent) 110%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.lede {
  font-size: 1.02rem;
  line-height: 1.9;
  color: var(--text-dim);
  max-width: 42rem;
  margin-bottom: 34px;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 14px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 14px;
  font-weight: 600;
  font-size: .96rem;
  line-height: 1;
  padding: 15px 22px;
  transition: transform .2s ease, box-shadow .25s ease, border-color .2s ease, background .2s ease;
  outline-offset: 3px;
}

.btn:focus-visible {
  outline: 3px solid rgba(100, 174, 255, .5);
}

.btn--primary {
  background: linear-gradient(135deg, #2f80ff, #3d9dff);
  border: 1px solid rgba(255, 255, 255, .18);
  color: #fff;
  box-shadow: 0 10px 34px rgba(47, 128, 255, .36);
}

.btn--primary:hover {
  background: linear-gradient(135deg, #3d8bff, #54b3ff);
  color: #fff;
  transform: translateY(-2px);
  box-shadow: 0 16px 46px rgba(47, 128, 255, .5);
}

.btn--primary:active {
  transform: translateY(0);
  box-shadow: 0 5px 18px rgba(47, 128, 255, .25);
}

.btn--ghost {
  background: rgba(255, 255, 255, .05);
  border: 1px solid rgba(163, 190, 255, .24);
  color: var(--text-body);
  backdrop-filter: blur(8px);
}

.btn--ghost:hover {
  color: #fff;
  border-color: rgba(100, 174, 255, .55);
  background: rgba(255, 255, 255, .08);
  transform: translateY(-2px);
}

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

.hero-panel {
  background:
    linear-gradient(180deg, rgba(255, 255, 255, .08), rgba(255, 255, 255, .03)),
    var(--surface);
  border: 1px solid rgba(163, 190, 255, .22);
  border-radius: 24px;
  padding: 12px;
  position: relative;
  overflow: hidden;
  box-shadow: 0 30px 80px rgba(7, 22, 60, .34), inset 0 1px 0 rgba(255, 255, 255, .08);
}

.hero-panel::after {
  content: "";
  position: absolute;
  inset: 0 0 auto 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, .35), transparent);
}

.window-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 6px 8px 12px;
}

.window-dots {
  display: flex;
  gap: 6px;
}

.window-dots i {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: rgba(202, 216, 245, .18);
}

.window-dots i:first-child { background: rgba(255, 156, 133, .8); }
.window-dots i:nth-child(2) { background: rgba(255, 211, 130, .8); }
.window-dots i:nth-child(3) { background: rgba(108, 216, 174, .8); }

.window-badge {
  font-size: 12px;
  color: var(--text-faint);
  letter-spacing: .04em;
  background: rgba(255, 255, 255, .05);
  border: 1px solid var(--line-soft);
  padding: 5px 11px;
  border-radius: 999px;
}

.window-frame {
  border-radius: 18px;
  overflow: hidden;
  border: 1px solid rgba(255, 255, 255, .12);
  background: #0d1a30;
  position: relative;
}

.window-frame img {
  width: 100%;
  aspect-ratio: 16 / 10;
  object-fit: cover;
}

.window-caption {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 14px 10px 8px;
}

.window-caption > div:first-child {
  min-width: 0;
}

.window-caption strong {
  display: block;
  color: var(--text-main);
  font-size: .96rem;
  line-height: 1.4;
}

.window-caption small {
  color: var(--text-faint);
  font-size: .78rem;
  line-height: 1.4;
}

.status-anchor {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  background: rgba(58, 255, 200, .1);
  border: 1px solid rgba(58, 255, 200, .28);
  color: #baffea;
  font-size: .76rem;
  border-radius: 999px;
  padding: 5px 10px;
  white-space: nowrap;
}

.status-anchor::before {
  content: "";
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--accent);
}

/* Metric strip */
.metric-strip {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  margin-top: -34px;
  position: relative;
  z-index: 4;
  background: rgba(10, 19, 36, .9);
  border: 1px solid var(--line-soft);
  border-radius: 20px;
  box-shadow: 0 16px 40px rgba(1, 4, 14, .35);
  overflow: hidden;
}

.metric-item {
  display: flex;
  align-items: flex-start;
  gap: 13px;
  padding: 20px 24px;
  border-right: 1px solid rgba(163, 190, 255, .1);
}

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

.metric-icon {
  flex: 0 0 30px;
  width: 30px;
  height: 30px;
  display: grid;
  place-items: center;
  border-radius: 10px;
  background: rgba(61, 139, 255, .12);
  border: 1px solid rgba(61, 139, 255, .25);
  color: var(--primary-light);
  font-size: .7rem;
  font-weight: 700;
  letter-spacing: -0.03em;
}

.metric-item strong {
  color: var(--text-main);
  display: block;
  font-size: .95rem;
  line-height: 1.4;
}

.metric-item span {
  color: var(--text-faint);
  display: block;
  font-size: .82rem;
  line-height: 1.5;
  margin-top: 2px;
}

@media (max-width: 1023px) {
  .metric-strip {
    grid-template-columns: repeat(2, 1fr);
    margin-top: 30px;
  }

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

  .metric-item {
    border-bottom: 1px solid rgb(163 190 255 / .1);
  }

  .metric-item:nth-child(3),
  .metric-item:nth-child(4) {
    border-bottom: 0;
  }
}

@media (max-width: 680px) {
  .metric-strip {
    grid-template-columns: 1fr;
  }

  .metric-item {
    border-right: 0;
    border-bottom: 1px solid rgba(163, 190, 255, .1);
  }

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

/* Doc body with sidebar */
.doc-section {
  padding: 88px 0 24px;
}

.doc-grid {
  display: grid;
  grid-template-columns: minmax(240px, 275px) minmax(0, 1fr);
  gap: 44px;
  align-items: start;
}

.doc-sidebar {
  position: sticky;
  top: 104px;
  padding: 22px;
  border-radius: 20px;
  background: rgba(13, 22, 38, .78);
  border: 1px solid var(--line-soft);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, .05);
  backdrop-filter: blur(10px);
}

.doc-sidebar-title {
  color: var(--text-main);
  font-size: 1rem;
  font-weight: 700;
  display: flex;
  align-items: center;
  gap: 9px;
  margin-bottom: 18px;
}

.doc-sidebar-title::before {
  content: "";
  width: 5px;
  height: 18px;
  border-radius: 99px;
  background: linear-gradient(180deg, var(--accent), var(--primary));
}

.side-nav {
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding: 0;
  margin: 0;
  list-style: none;
}

.side-nav a {
  display: block;
  padding: 10px 14px;
  border-radius: 11px;
  color: var(--text-dim);
  font-size: .94rem;
  border: 1px solid transparent;
  transition: all .2s ease;
}

.side-nav a:hover {
  color: #fff;
  background: rgba(255, 255, 255, .08);
  border-color: rgba(255, 255, 255, .05);
}

.side-nav a.is-active {
  color: #fff;
  background: rgba(61, 139, 255, .16);
  border-color: rgba(61, 139, 255, .3);
}

.side-note {
  margin-top: 20px;
  padding: 16px 15px;
  border-radius: 14px;
  background: rgba(255, 255, 255, .04);
  border: 1px solid rgba(163, 190, 255, .12);
  color: var(--text-faint);
  font-size: .86rem;
  line-height: 1.8;
}

.side-note strong {
  color: var(--text-body);
  display: block;
  margin-bottom: 4px;
}

@media (max-width: 1023.98px) {
  .entry-hero__inner {
    grid-template-columns: 1fr;
    gap: 44px;
  }

  .entry-hero {
    padding-top: 76px;
  }

  .doc-section {
    padding-top: 58px;
  }

  .doc-grid {
    grid-template-columns: 1fr;
    gap: 34px;
  }

  .doc-sidebar {
    position: static;
    top: auto;
  }
}

.doc-body {
  min-width: 0;
}

.content-block {
  scroll-margin-top: 130px;
  margin-bottom: 68px;
}

.block-head {
  margin-bottom: 18px;
}

.block-head .section-label {
  display: inline-block;
  color: var(--accent);
  font-size: .82rem;
  letter-spacing: .05em;
  margin-bottom: 7px;
  font-weight: 500;
}

.block-title {
  color: var(--text-main);
  font-size: clamp(1.5rem, 2.2vw, 2.05rem);
  font-weight: 760;
  line-height: 1.35;
}

.block-desc {
  color: var(--text-dim);
  margin-top: 12px;
  max-width: 54rem;
}

.border-head {
  border-left: 3px solid var(--primary);
  padding-left: 17px;
}

/* Track cards */
.split-cards {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
  margin-top: 30px;
}

.track-card {
  background: linear-gradient(180deg, rgba(255, 255, 255, .07), rgba(255, 255, 255, .025));
  border: 1px solid var(--line);
  border-radius: 18px;
  padding: 24px;
  position: relative;
  transition: border-color .25s ease, transform .25s ease, box-shadow .25s ease;
  overflow: hidden;
}

.track-card::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  width: 100%;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, .4), transparent);
}

.track-card:hover {
  transform: translateY(-4px);
  border-color: rgba(100, 174, 255, .42);
  box-shadow: 0 16px 40px rgba(30, 66, 130, .24);
}

.track-icon {
  width: 38px;
  height: 38px;
  border-radius: 12px;
  display: grid;
  place-items: center;
  font-weight: 800;
  margin-bottom: 16px;
  background: rgba(61, 139, 255, .14);
  border: 1px solid rgba(61, 139, 255, .3);
  color: var(--primary-light);
}

.track-card h3 {
  color: var(--text-main);
  font-size: 1.05rem;
  margin-bottom: 10px;
}

.track-card p {
  color: var(--text-dim);
  font-size: .93rem;
  line-height: 1.85;
}

.track-card .track-hint {
  display: inline-flex;
  gap: 7px;
  align-items: center;
  margin-top: 16px;
  font-size: .82rem;
  color: var(--accent);
}

@media (max-width: 720px) {
  .split-cards {
    grid-template-columns: 1fr;
  }

  .track-card {
    padding: 20px;
  }
}

/* Stage rows */
.stage-list {
  border-top: 1px solid rgba(163, 190, 255, .15);
  margin-top: 34px;
}

.stage-item {
  display: grid;
  grid-template-columns: 180px minmax(0, 1fr) 240px;
  gap: 22px;
  align-items: start;
  padding: 20px 4px;
  border-bottom: 1px solid rgba(163, 190, 255, .12);
  transition: background .2s ease;
}

.stage-item:hover {
  background: rgba(255, 255, 255, .025);
}

.stage-name {
  color: #fff;
  font-size: 1rem;
  font-weight: 700;
  display: flex;
  align-items: center;
  gap: 10px;
}

.stage-name i {
  font-style: normal;
  background: rgba(58, 255, 200, .14);
  color: var(--accent);
  font-size: .88rem;
  width: 24px;
  height: 24px;
  display: inline-grid;
  place-items: center;
  border-radius: 8px;
  border: 1px solid rgba(58, 255, 200, .18);
}

.stage-about {
  color: var(--text-dim);
  font-size: .93rem;
  line-height: 1.8;
}

.stage-action {
  color: var(--text-faint);
  font-size: .88rem;
  line-height: 1.75;
  background: rgba(255, 255, 255, .035);
  border: 1px solid rgba(163, 190, 255, .1);
  border-radius: 12px;
  padding: 12px 14px;
}

@media (max-width: 1080px) {
  .stage-item {
    grid-template-columns: 1fr;
    gap: 10px;
    padding: 22px 2px;
  }

  .stage-action {
    padding: 10px 14px;
  }
}

/* process */
.process-list {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0;
  margin-top: 32px;
  border: 1px solid var(--line-soft);
  border-radius: 20px;
  background: rgba(255, 255, 255, .025);
  overflow: hidden;
}

.process-item {
  display: flex;
  align-items: flex-start;
  gap: 16px;
  padding: 22px 24px;
  background: transparent;
  border-right: 1px solid rgba(163, 190, 255, .08);
  border-bottom: 1px solid rgba(163, 190, 255, .08);
}

.process-item:nth-child(even) {
  border-right: 0;
}

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

.process-num {
  flex: 0 0 38px;
  width: 38px;
  height: 38px;
  display: grid;
  place-items: center;
  border-radius: 12px;
  background: linear-gradient(135deg, rgba(61, 139, 255, .4), rgba(58, 255, 200, .15));
  border: 1px solid rgba(100, 174, 255, .25);
  color: #fff;
  font-weight: 800;
  font-size: .6rem;
  letter-spacing: 0;
}

.process-item h3 {
  color: var(--text-main);
  font-size: .98rem;
  margin-bottom: 5px;
}

.process-item p {
  color: var(--text-dim);
  font-size: .9rem;
  line-height: 1.75;
}

@media (max-width: 800px) {
  .process-list {
    grid-template-columns: 1fr;
  }

  .process-item {
    border-right: 0;
  }

  .process-item {
    border-bottom: 1px solid rgba(163, 190, 255, .1);
  }

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

/* Mixed tip block */
.tip-media {
  display: grid;
  grid-template-columns: minmax(0, .9fr) minmax(0, 1.1fr);
  gap: 0;
  border-radius: 24px;
  border: 1px solid var(--line-soft);
  overflow: hidden;
  background: rgba(15, 26, 45, .7);
  margin-top: 30px;
}

.tip-media img {
  width: 100%;
  min-height: 100%;
  object-fit: cover;
}

.tip-content {
  padding: clamp(26px, 4vw, 46px);
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.tip-content h3 {
  font-size: 1.28rem;
  margin-bottom: 14px;
}

.tip-content p {
  color: var(--text-dim);
  margin-bottom: 22px;
  line-height: 1.9;
}

.cozy-list {
  list-style: none;
  padding: 0;
  margin: 0 0 22px;
}

.cozy-list li {
  position: relative;
  padding-left: 22px;
  color: var(--text-body);
  font-size: .93rem;
  line-height: 1.8;
}

.cozy-list li::before {
  content: "";
  position: absolute;
  left: 3px;
  top: .85em;
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 9px rgba(58, 255, 200, .45);
}

.tip-link {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: var(--primary-light);
  font-weight: 600;
  font-size: .93rem;
}

.tip-link::after {
  content: "→";
  transition: transform .2s ease;
}

.tip-link:hover::after {
  transform: translateX(4px);
}

@media (max-width: 900px) {
  .tip-media {
    grid-template-columns: 1fr;
  }

  .tip-media img {
    aspect-ratio: 16 / 7;
    min-height: auto;
  }
}

/* faq */
.faq-list {
  margin-top: 34px;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.faq-item {
  border: 1px solid var(--line-soft);
  border-radius: 18px;
  background: rgba(255, 255, 255, .035);
  overflow: hidden;
  transition: border-color .2s ease, box-shadow .2s ease;
}

.faq-item.is-open {
  border-color: rgba(100, 174, 255, .35);
  box-shadow: 0 14px 40px rgba(17, 43, 100, .24);
}

.faq-question {
  width: 100%;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  text-align: left;
  color: var(--text-main);
  font-weight: 600;
  padding: 19px 22px;
  cursor: pointer;
  font-size: .98rem;
  transition: background .2s ease;
}

.faq-question:hover {
  background: rgba(255, 255, 255, .04);
}

.faq-question .faq-icon {
  flex: 0 0 28px;
  width: 28px;
  height: 28px;
  display: grid;
  place-items: center;
  border-radius: 50%;
  background: rgba(61, 139, 255, .12);
  border: 1px solid rgba(61, 139, 255, .25);
  color: var(--primary-light);
  transition: transform .25s ease, background .25s ease;
}

.faq-icon::after {
  content: "+";
  font-size: 1.1rem;
  line-height: 1;
}

.faq-item.is-open .faq-icon {
  transform: rotate(135deg);
  background: rgba(58, 255, 200, .15);
  border-color: rgba(58, 255, 200, .4);
  color: var(--accent);
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height .3s ease;
}

.faq-answer-inner {
  padding: 0 22px 21px;
  color: var(--text-dim);
  font-size: .94rem;
  line-height: 1.9;
}

.faq-answer-inner a {
  color: var(--primary-light);
}

/* CTA band */
.cta-wrap {
  padding: 44px 0 110px;
}

.cta-band {
  position: relative;
  border: 1px solid rgba(100, 174, 255, .25);
  border-radius: 24px;
  padding: clamp(30px, 5vw, 58px);
  background:
    radial-gradient(430px 240px at 82% 0%, rgba(58, 255, 200, .12), transparent 66%),
    radial-gradient(500px 260px at 15% 100%, rgba(47, 128, 255, .25), transparent 62%),
    #0a162b;
  overflow: hidden;
}

.cta-band h2 {
  color: #fff;
  font-size: clamp(1.9rem, 3vw, 2.8rem);
  line-height: 1.3;
  margin-bottom: 18px;
  max-width: 17em;
}

.cta-band p {
  color: var(--text-dim);
  font-size: 1rem;
  max-width: 44rem;
  line-height: 1.9;
  margin-bottom: 34px;
}

.cta-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 13px;
}

/* Footer */
.site-footer {
  background:
    radial-gradient(900px 260px at 90% -10%, rgba(47, 128, 255, .12), transparent 60%),
    rgba(4, 9, 18, .9);
  border-top: 1px solid rgba(163, 190, 255, .12);
  padding: 64px 0 30px;
  margin-top: 30px;
}

.footer-top {
  display: grid;
  grid-template-columns: minmax(0, 1.6fr) minmax(200px, .9fr) minmax(200px, .9fr);
  gap: 40px;
  padding-bottom: 40px;
  border-bottom: 1px solid rgba(163, 190, 255, .1);
}

.footer-brand {
  color: #fff;
  font-size: 1.15rem;
  font-weight: 800;
  margin-bottom: 14px;
  display: inline-flex;
  align-items: center;
  gap: 10px;
}

.footer-brand::before {
  content: "K";
  display: inline-grid;
  place-items: center;
  width: 26px;
  height: 26px;
  border-radius: 8px;
  background: linear-gradient(140deg, var(--accent), var(--primary));
  color: #fff;
  font-size: .8rem;
  font-weight: 800;
}

.footer-desc {
  color: var(--text-faint);
  font-size: .88rem;
  line-height: 1.9;
  max-width: 25rem;
}

.footer-col {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 10px;
}

.footer-col h4 {
  color: var(--text-main);
  font-size: .95rem;
  margin-bottom: 8px;
}

.footer-col a,
.footer-col span {
  color: var(--text-faint);
  font-size: .88rem;
  transition: color .2s ease;
}

.footer-col a:hover {
  color: var(--primary-light);
}

.footer-copy {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 12px;
  padding-top: 26px;
  color: var(--text-faint);
  font-size: .82rem;
}

@media (max-width: 820px) {
  .footer-top {
    grid-template-columns: 1fr;
    gap: 28px;
  }
}

@media (max-width: 600px) {
  .footer-copy {
    flex-direction: column;
    justify-content: flex-start;
  }
}