/* roulang page: index */
:root {
    --bg: #0A0D12;
    --panel: #11161D;
    --soft: #0E1319;
    --text: #E7ECF2;
    --muted: #97A3B4;
    --signal: #D2F26A;
    --copper: #C08A5E;
    --line: rgba(255, 255, 255, 0.08);
    --line-strong: rgba(255, 255, 255, 0.14);
    --radius-md: 16px;
    --radius-lg: 20px;
    --radius-pill: 999px;
    --shadow-soft: 0 18px 50px rgba(0, 0, 0, 0.32), 0 1px 0 rgba(255, 255, 255, 0.04);
    --ease: 180ms cubic-bezier(0.22, 1, 0.36, 1);
  }
  *, *::before, *::after {
    box-sizing: border-box;
  }
  html {
    scroll-behavior: smooth;
  }
  body {
    margin: 0;
    background: var(--bg);
    color: var(--text);
    font-family: 'PingFang SC', 'Microsoft YaHei', 'Noto Sans SC', 'system-ui', 'sans-serif';
    line-height: 1.7;
    -webkit-font-smoothing: antialiased;
    text-rendering: optimizeLegibility;
  }
  body::before {
    content: "";
    position: fixed;
    inset: 0;
    pointer-events: none;
    z-index: 0;
    background-image:
      radial-gradient(circle at 18% 12%, rgba(255, 255, 255, 0.05), transparent 26%),
      radial-gradient(circle at 76% 8%, rgba(210, 242, 106, 0.04), transparent 22%),
      radial-gradient(rgba(255, 255, 255, 0.16) 0.6px, transparent 0.6px),
      radial-gradient(rgba(255, 255, 255, 0.08) 0.7px, transparent 0.7px);
    background-size: 100% 100%, 100% 100%, 42px 42px, 71px 71px;
    background-position: 0 0, 0 0, 0 0, 17px 11px;
    opacity: 0.5;
  }
  a {
    color: inherit;
    text-decoration: none;
  }
  img {
    max-width: 100%;
    height: auto;
    display: block;
  }
  button {
    font-family: inherit;
    cursor: pointer;
  }
  .page-glow {
    position: relative;
    z-index: 1;
  }
  .wrap {
    width: min(1200px, 92vw);
    margin: 0 auto;
  }
  .section-space {
    padding: 7.5rem 0;
  }
  .card-surface {
    background: rgba(17, 22, 29, 0.82);
    border: 1px solid var(--line);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-soft);
    backdrop-filter: blur(14px);
    -webkit-backdrop-filter: blur(14px);
  }
  .glass-nav {
    background: rgba(13, 17, 23, 0.78);
    border: 1px solid rgba(255, 255, 255, 0.08);
    box-shadow: 0 14px 50px rgba(0, 0, 0, 0.24);
    backdrop-filter: blur(18px);
    -webkit-backdrop-filter: blur(18px);
    border-radius: var(--radius-pill);
  }
  .nav-link {
    position: relative;
    display: inline-flex;
    align-items: center;
    gap: .35rem;
    white-space: nowrap;
    padding: 0.55rem 0.8rem;
    border-radius: 999px;
    color: #b7c2d0;
    font-size: 0.92rem;
    font-weight: 500;
    transition: color var(--ease), background var(--ease);
  }
  .nav-link:hover {
    background: rgba(255, 255, 255, 0.07);
    color: var(--text);
  }
  .nav-link.active {
    background: rgba(210, 242, 106, 0.11);
    color: var(--signal);
  }
  .nav-link.active::after {
    content: "";
    position: absolute;
    left: 50%;
    bottom: 0.12rem;
    width: 4px;
    height: 4px;
    border-radius: 999px;
    background: var(--signal);
    transform: translateX(-50%);
  }
  .btn-primary,
  .btn-ghost,
  .btn-quiet {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: .45rem;
    border-radius: 999px;
    font-weight: 600;
    letter-spacing: .02em;
    transition: transform var(--ease), background var(--ease), border-color var(--ease), color var(--ease), box-shadow var(--ease);
  }
  .btn-primary {
    background: var(--signal);
    color: #151A12;
    padding: 0.85rem 1.7rem;
    box-shadow: 0 8px 24px rgba(210, 242, 106, 0.16);
  }
  .btn-primary:hover {
    background: #E1FA8C;
    transform: translateY(-2px);
    box-shadow: 0 12px 26px rgba(210, 242, 106, 0.2);
  }
  .btn-primary:focus-visible,
  .btn-ghost:focus-visible,
  .btn-quiet:focus-visible {
    outline: 3px solid rgba(210, 242, 106, 0.5);
    outline-offset: 3px;
  }
  .btn-ghost {
    border: 1px solid rgba(255, 255, 255, 0.18);
    color: var(--text);
    padding: 0.85rem 1.5rem;
  }
  .btn-ghost:hover {
    border-color: rgba(210, 242, 106, 0.45);
    background: rgba(255, 255, 255, 0.07);
    transform: translateY(-1px);
  }
  .btn-quiet {
    color: var(--muted);
    padding: 0.5rem 0;
  }
  .btn-quiet:hover {
    color: var(--signal);
    transform: translateY(-1px);
  }
  .eyebrow {
    display: inline-flex;
    align-items: center;
    gap: .45rem;
    padding: .35rem .8rem;
    border: 1px solid rgba(210, 242, 106, 0.25);
    background: rgba(210, 242, 106, 0.07);
    border-radius: 999px;
    color: var(--signal);
    font-size: 0.83rem;
    font-weight: 600;
    letter-spacing: .06em;
  }
  .feature-index {
    font-size: 0.84rem;
    line-height: 1;
    letter-spacing: .18em;
    color: var(--copper);
  }
  .show-line {
    width: 1px;
    height: 92px;
    background: linear-gradient(to bottom, rgba(255, 255, 255, 0.02), rgba(255, 255, 255, 0.3));
    position: relative;
    overflow: hidden;
    margin: 0 auto;
  }
  .show-line::after {
    content: "";
    position: absolute;
    left: 0;
    top: -30%;
    width: 100%;
    height: 34px;
    background: linear-gradient(to bottom, transparent, rgba(210, 242, 106, 0.85), transparent);
    animation: scrollHint 1.8s ease-in-out infinite;
  }
  @keyframes scrollHint {
    0% { top: -30%; opacity: 0; }
    35% { opacity: 1; }
    100% { top: 110%; opacity: 0; }
  }
  .fade-group > * {
    opacity: 0;
    transform: translateY(16px);
    animation: fadeUp 0.65s cubic-bezier(0.22, 1, 0.36, 1) forwards;
  }
  .fade-group > *:nth-child(1) { animation-delay: 0.08s; }
  .fade-group > *:nth-child(2) { animation-delay: 0.2s; }
  .fade-group > *:nth-child(3) { animation-delay: 0.32s; }
  .fade-group > *:nth-child(4) { animation-delay: 0.42s; }
  .fade-group > *:nth-child(5) { animation-delay: 0.52s; }
  @keyframes fadeUp {
    to { opacity: 1; transform: translateY(0); }
  }
  .split-card {
    transition: transform var(--ease), border-color var(--ease), box-shadow var(--ease);
  }
  .split-card:hover {
    transform: translateY(-4px);
    border-color: rgba(255, 255, 255, 0.16);
    box-shadow: 0 24px 60px rgba(0, 0, 0, 0.34);
  }
  .hover-media {
    overflow: hidden;
  }
  .hover-media img {
    transition: transform 0.6s cubic-bezier(0.22, 1, 0.36, 1), filter 0.3s ease;
  }
  .hover-media:hover img {
    transform: scale(1.035);
  }
  .media-cover {
    position: relative;
  }
  .media-cover::after {
    content: "";
    position: absolute;
    inset: 0;
    background: linear-gradient(180deg, transparent 62%, rgba(6, 9, 13, 0.75));
    pointer-events: none;
  }
  details.faq-item {
    border-bottom: 1px solid var(--line);
  }
  details.faq-item summary {
    list-style: none;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
    padding: 1.45rem 0.25rem;
    cursor: pointer;
    font-size: 1.02rem;
    font-weight: 600;
    transition: color var(--ease);
  }
  details.faq-item summary::-webkit-details-marker {
    display: none;
  }
  details.faq-item summary:hover {
    color: var(--signal);
  }
  details.faq-item .faq-icon {
    width: 22px;
    height: 22px;
    border-radius: 50%;
    border: 1px solid rgba(255, 255, 255, 0.18);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    transition: transform var(--ease), background var(--ease), color var(--ease), border-color var(--ease);
    color: var(--muted);
    font-size: .9rem;
  }
  details.faq-item[open] .faq-icon {
    transform: rotate(45deg);
    background: var(--signal);
    border-color: var(--signal);
    color: #151A12;
  }
  details.faq-item .faq-answer {
    padding: 0 0.5rem 1.6rem 0.25rem;
    color: var(--muted);
    max-width: 780px;
    line-height: 1.75;
  }
  details.faq-item[open] summary {
    color: var(--signal);
  }
  .cell-list > li {
    padding-left: 1.4rem;
    position: relative;
    transition: background var(--ease), border-color var(--ease);
  }
  .cell-list > li a {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    gap: 1rem;
    padding: 1.05rem 0.85rem;
    border-radius: 14px;
    background: transparent;
    transition: background var(--ease), color var(--ease);
  }
  .cell-list > li a:hover {
    background: rgba(255, 255, 255, 0.035);
  }
  .cell-list > li::before {
    content: "";
    position: absolute;
    left: 0;
    top: 1.28rem;
    width: 4px;
    height: 4px;
    border-radius: 999px;
    background: var(--signal);
    opacity: 0;
    transition: opacity var(--ease);
  }
  .cell-list > li:hover::before {
    opacity: 1;
  }
  #backTop {
    opacity: 0;
    pointer-events: none;
    transition: opacity var(--ease), transform var(--ease), background var(--ease);
    transform: translateY(10px);
  }
  #backTop.show {
    opacity: 1;
    pointer-events: auto;
    transform: translateY(0);
  }
  .noise-divider {
    height: 1px;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.16), transparent);
  }
  .image-frame {
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 20px;
    overflow: hidden;
    box-shadow: 0 24px 90px rgba(0, 0, 0, 0.46);
  }
  .preview-chrome {
    display: flex;
    align-items: center;
    gap: 0.35rem;
    padding: 0.65rem 1rem;
    border-bottom: 1px solid rgba(255, 255, 255, 0.08);
    background: rgba(255, 255, 255, 0.03);
  }
  .preview-dot {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.12);
  }
  @media (max-width: 1024px) {
    .section-space {
      padding: 5.5rem 0;
    }
  }
  @media (max-width: 520px) {
    .section-space {
      padding: 4rem 0;
    }
    .wrap {
      width: min(1200px, 90vw);
    }
  }
  @media (prefers-reduced-motion: reduce) {
    html {
      scroll-behavior: auto;
    }
    *, *::before, *::after {
      animation-duration: 0.01ms !important;
      animation-iteration-count: 1 !important;
      transition-duration: 0.01ms !important;
    }
  }

/* roulang page: article */
:root {
            --bg: #0A0D12;
            --bg-panel: #11161D;
            --text-main: #E7ECF2;
            --text-sub: #97A3B4;
            --accent: #D2F26A;
            --accent-2: #C08A5E;
            --danger: #C96B5A;
            --border-soft: rgba(255, 255, 255, .08);
            --radius-lg: 20px;
            --radius-md: 16px;
            --radius-sm: 8px;
            --shadow-soft: 0 24px 60px rgba(0, 0, 0, .35), 0 1px 2px rgba(255, 255, 255, .03);
            --ease: cubic-bezier(.22, .61, .36, 1);
        }

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

        html {
            scroll-behavior: smooth;
            scroll-padding-top: 110px;
        }

        body {
            background-color: var(--bg);
            color: var(--text-main);
            font-family: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", -apple-system, BlinkMacSystemFont, sans-serif;
            letter-spacing: .01em;
            overflow-x: hidden;
        }

        body::before {
            content: "";
            position: fixed;
            inset: 0;
            z-index: 0;
            pointer-events: none;
            background:
                radial-gradient(1px 1px at 12% 22%, rgba(255, 255, 255, .13) 0, transparent 100%),
                radial-gradient(1px 1px at 34% 68%, rgba(210, 242, 106, .12) 0, transparent 100%),
                radial-gradient(1.2px 1.2px at 62% 18%, rgba(255, 255, 255, .09) 0, transparent 100%),
                radial-gradient(1px 1px at 82% 52%, rgba(255, 255, 255, .1) 0, transparent 100%),
                radial-gradient(1.4px 1.4px at 45% 88%, rgba(192, 138, 94, .1) 0, transparent 100%),
                radial-gradient(1px 1px at 90% 80%, rgba(210, 242, 106, .07) 0, transparent 100%);
        }

        body::after {
            content: "";
            position: fixed;
            inset: 0;
            z-index: 1;
            pointer-events: none;
            background: radial-gradient(62% 42% at 50% 10%, rgba(46, 64, 92, .10), transparent 100%);
        }

        a,
        button,
        input {
            transition: all .2s var(--ease);
        }

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

        ::selection {
            background: rgba(210, 242, 106, .28);
            color: #fff;
        }

        :focus-visible {
            outline: 2px solid rgba(210, 242, 106, .85);
            outline-offset: 3px;
            border-radius: 6px;
        }

        .wrap {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 24px;
            position: relative;
            z-index: 2;
        }

        .glass-nav-wrap {
            position: fixed;
            top: 14px;
            left: 50%;
            transform: translateX(-50%);
            width: min(920px, calc(100vw - 20px));
            z-index: 80;
        }

        .glass-nav {
            border-radius: 999px;
            background: rgba(14, 17, 24, .72);
            -webkit-backdrop-filter: blur(18px);
            backdrop-filter: blur(18px);
            border: 1px solid rgba(255, 255, 255, .08);
            box-shadow: 0 12px 40px rgba(0, 0, 0, .28), 0 2px 10px rgba(0, 0, 0, .2);
        }

        .nav-link {
            display: inline-flex;
            align-items: center;
            padding: 8px 13px;
            border-radius: 999px;
            font-size: .9rem;
            line-height: 1;
            color: rgba(231, 236, 242, .66);
            letter-spacing: .02em;
            white-space: nowrap;
        }

        .nav-link:hover {
            color: #E7ECF2;
            background: rgba(255, 255, 255, .06);
        }

        .nav-link.active {
            position: relative;
            color: #D2F26A;
            background: rgba(210, 242, 106, .07);
        }

        .nav-link.active::after {
            content: "";
            position: absolute;
            bottom: 3px;
            left: 50%;
            transform: translateX(-50%);
            width: 15px;
            height: 3px;
            border-radius: 999px;
            background: #D2F26A;
            box-shadow: 0 0 10px rgba(210, 242, 106, .8);
        }

        .btn-primary,
        .btn-outline,
        .btn-ghost {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            border-radius: 999px;
            font-size: .92rem;
            font-weight: 600;
            text-align: center;
            gap: 8px;
            cursor: pointer;
        }

        .btn-primary {
            background: var(--accent);
            color: #10150C;
            padding: 12px 26px;
            border: 1px solid rgba(210, 242, 106, .9);
            box-shadow: 0 10px 30px rgba(210, 242, 106, .12);
        }

        .btn-primary:hover {
            background: #ddfb7e;
            transform: translateY(-2px);
            box-shadow: 0 14px 38px rgba(210, 242, 106, .2);
            color: #0a0d12;
        }

        .btn-outline {
            border: 1px solid rgba(255, 255, 255, .16);
            color: var(--text-main);
            padding: 11px 22px;
            background: rgba(255, 255, 255, .02);
            -webkit-backdrop-filter: blur(6px);
            backdrop-filter: blur(6px);
        }

        .btn-outline:hover {
            border-color: rgba(210, 242, 106, .5);
            background: rgba(255, 255, 255, .08);
            color: #D2F26A;
            transform: translateY(-1px);
        }

        .btn-ghost {
            color: #97A3B4;
            padding: 9px 12px;
            background: transparent;
        }

        .btn-ghost:hover {
            color: #D2F26A;
            background: rgba(255, 255, 255, .04);
        }

        .mobile-drawer {
            border-radius: 22px;
            background: rgba(14, 17, 24, .92);
            -webkit-backdrop-filter: blur(20px);
            backdrop-filter: blur(20px);
            border: 1px solid rgba(255, 255, 255, .09);
            box-shadow: 0 20px 60px rgba(0, 0, 0, .35);
        }

        .main-wrap {
            position: relative;
            z-index: 2;
        }

        .article-hero {
            position: relative;
            background: var(--bg);
        }

        .article-hero::before {
            content: "";
            position: absolute;
            inset: 0;
            z-index: 1;
            background: linear-gradient(to bottom, rgba(10, 13, 18, .70), rgba(10, 13, 18, .55), rgba(10, 13, 18, .94), var(--bg) 100%);
        }

        .hero-bg {
            position: absolute;
            inset: 0;
            object-fit: cover;
            opacity: .52;
            width: 100%;
            height: 100%;
        }

        .article-breadcrumb {
            display: inline-flex;
            align-items: center;
            flex-wrap: wrap;
            gap: 8px;
            border: 1px solid rgba(255, 255, 255, .08);
            background: rgba(255, 255, 255, .04);
            border-radius: 999px;
            padding: 8px 18px;
        }

        .article-breadcrumb a {
            color: var(--text-sub);
            font-size: .8rem;
            letter-spacing: .02em;
        }

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

        .article-breadcrumb span {
            color: rgba(255, 255, 255, .24);
            font-size: .8rem;
        }

        .tagline-dot {
            width: 6px;
            height: 6px;
            background: #D2F26A;
            display: inline-block;
            border-radius: 999px;
            box-shadow: 0 0 10px rgba(210, 242, 106, .9);
            margin-right: 9px;
            vertical-align: 2px;
        }

        .badge-cat {
            display: inline-flex;
            align-items: center;
            border-radius: 999px;
            border: 1px solid rgba(210, 242, 106, .22);
            background: rgba(210, 242, 106, .08);
            color: #D2F26A;
            font-size: .78rem;
            padding: 5px 13px;
            font-weight: 600;
            letter-spacing: .04em;
        }

        .article-meta {
            display: inline-flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 14px;
        }

        .article-meta span {
            display: inline-flex;
            align-items: center;
            gap: 7px;
            color: #97A3B4;
            font-size: .82rem;
        }

        .article-title-ui {
            font-size: clamp(2rem, 5vw, 3.4rem);
            line-height: 1.16;
            letter-spacing: -.02em;
            font-weight: 800;
            overflow-wrap: break-word;
        }

        .article-frame {
            border: 1px solid rgba(255, 255, 255, .07);
            background: rgba(17, 22, 29, .58);
            border-radius: 24px;
            box-shadow: var(--shadow-soft);
            -webkit-backdrop-filter: blur(12px);
            backdrop-filter: blur(12px);
        }

        .article-body {
            position: relative;
        }

        .article-body p {
            color: rgba(231, 236, 242, .88);
            line-height: 1.85;
            font-size: 16px;
            margin: 0 0 1.6em;
        }

        .article-body h2 {
            font-size: 1.7rem;
            line-height: 1.35;
            color: #E7ECF2;
            font-weight: 700;
            margin: 2.2em 0 .8em;
            letter-spacing: -.01em;
        }

        .article-body h3 {
            font-size: 1.25rem;
            font-weight: 700;
            line-height: 1.55;
            color: #E7ECF2;
            margin: 1.9em 0 .7em;
        }

        .article-body h4 {
            font-size: 1.05rem;
            font-weight: 700;
            color: #E7ECF2;
            margin: 1.8em 0 .5em;
        }

        .article-body ul {
            margin: 0 0 1.5em;
            padding: 0;
            list-style: none;
        }

        .article-body ul li {
            position: relative;
            padding-left: 26px;
            padding-bottom: 12px;
            color: rgba(231, 236, 242, .84);
            line-height: 1.8;
            font-size: 16px;
        }

        .article-body ul li::before {
            content: "";
            position: absolute;
            top: .78em;
            left: 2px;
            width: 9px;
            height: 9px;
            background: var(--accent);
            border-radius: 2px;
            transform: rotate(45deg) skewY(-10deg);
            box-shadow: 0 0 12px rgba(210, 242, 106, .4);
        }

        .article-body ol {
            margin: 0 0 1.6em;
            padding: 0;
            counter-reset: rich-card;
            list-style: none;
        }

        .article-body ol li {
            position: relative;
            padding: 4px 0 14px 58px;
            counter-increment: rich-card;
            color: rgba(231, 236, 242, .84);
            line-height: 1.8;
            font-size: 16px;
            min-height: 38px;
        }

        .article-body ol li::before {
            content: counter(rich-card);
            position: absolute;
            left: 0;
            top: 0;
            width: 34px;
            height: 34px;
            display: flex;
            align-items: center;
            justify-content: center;
            border-radius: 50%;
            font-size: .78rem;
            font-weight: 800;
            color: #161b15;
            background: var(--accent);
            box-shadow: 0 10px 20px rgba(210, 242, 106, .12);
        }

        .article-body blockquote {
            margin: 2.1em 0;
            padding: 22px 26px 22px 30px;
            border-left: 3px solid var(--accent);
            background: rgba(255, 255, 255, .025);
            border-radius: 0 18px 18px 0;
            color: rgba(231, 236, 242, .82);
            line-height: 1.8;
        }

        .article-body blockquote p {
            margin: 0;
            color: inherit;
        }

        .article-body a {
            color: var(--accent);
            border-bottom: 1px solid rgba(210, 242, 106, .3);
            text-decoration: none;
        }

        .article-body a:hover {
            color: #e5fb8a;
            border-color: rgba(210, 242, 106, .8);
        }

        .article-body img {
            border-radius: 16px;
            box-shadow: 0 22px 50px rgba(0, 0, 0, .28);
            margin: 2em auto;
            object-fit: cover;
        }

        .article-body figure {
            margin: 2.2em auto;
        }

        .article-body figure img {
            margin: 0 auto .8rem;
        }

        .article-body figure figcaption {
            text-align: center;
            color: #738093;
            font-size: .8rem;
            line-height: 1.6;
        }

        .article-body table {
            width: 100%;
            border-collapse: collapse;
            margin: 2em 0;
            font-size: .9rem;
            border: 1px solid rgba(255, 255, 255, .08);
            border-radius: 12px;
            overflow: hidden;
        }

        .article-body th {
            background: rgba(210, 242, 106, .08);
            color: #E7ECF2;
            text-align: left;
            font-weight: 700;
            padding: 12px 15px;
            border: 1px solid rgba(255, 255, 255, .07);
        }

        .article-body td {
            color: rgba(231, 236, 242, .8);
            padding: 11px 15px;
            border: 1px solid rgba(255, 255, 255, .06);
            background: rgba(255, 255, 255, .012);
        }

        .article-body code {
            font-family: "SFMono-Regular", Consolas, "Liberation Mono", monospace;
            background: rgba(255, 255, 255, .06);
            border-radius: 6px;
            padding: 2px 7px;
            color: var(--accent);
            font-size: .86em;
        }

        .article-body pre {
            background: #0e131a;
            border: 1px solid rgba(255, 255, 255, .08);
            border-radius: 14px;
            padding: 20px;
            overflow-x: auto;
            margin: 2em 0;
        }

        .article-body pre code {
            background: transparent;
            padding: 0;
            font-size: .85rem;
            color: #D7E3EC;
            line-height: 1.7;
        }

        .article-body h1,
        .article-body .entry-title {
            font-size: 2rem;
        }

        .card-equal {
            border-radius: var(--radius-md);
            border: 1px solid var(--border-soft);
            background: linear-gradient(180deg, rgba(255, 255, 255, .03), rgba(17, 22, 29, .5));
            transition: transform .25s var(--ease), border-color .25s var(--ease), box-shadow .25s var(--ease);
        }

        .card-equal:hover {
            transform: translateY(-4px);
            border-color: rgba(210, 242, 106, .25);
            box-shadow: 0 24px 48px rgba(0, 0, 0, .25);
        }

        .menu-line {
            height: 1px;
            background: linear-gradient(90deg, transparent, rgba(255, 255, 255, .1), transparent);
        }

        .noise-divider {
            height: 1px;
            background: linear-gradient(90deg, rgba(255, 255, 255, .05), rgba(255, 255, 255, .14), rgba(255, 255, 255, .05));
        }

        .corner-stamp {
            writing-mode: vertical-rl;
            letter-spacing: .3em;
            text-transform: uppercase;
            font-size: 10px;
            color: rgba(231, 236, 242, .2);
            border: 1px solid rgba(255, 255, 255, .08);
            border-radius: 999px;
            padding: 18px 6px;
            position: absolute;
        }

        .live-pulse {
            position: relative;
        }

        .live-pulse::after {
            content: "";
            position: absolute;
            right: -4px;
            top: -4px;
            width: 8px;
            height: 8px;
            background: #FF5E45;
            border-radius: 99px;
            box-shadow: 0 0 0 rgba(255, 94, 69, .5);
            animation: pulseRing 1.8s infinite;
        }

        @keyframes pulseRing {
            0% { box-shadow: 0 0 0 0 rgba(255, 94, 69, .35); }
            60% { box-shadow: 0 0 0 7px rgba(255, 94, 69, 0); }
            100% { box-shadow: 0 0 0 0 rgba(255, 94, 69, 0); }
        }

        .faq-acc {
            border-bottom: 1px solid rgba(255, 255, 255, .07);
        }

        .faq-acc:last-child {
            border-bottom: 0;
        }

        .faq-acc summary {
            display: flex;
            align-items: center;
            justify-content: space-between;
            cursor: pointer;
            padding: 20px 8px;
            list-style: none;
            font-weight: 600;
            color: rgba(231, 236, 242, .9);
            border-radius: 8px;
        }

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

        .faq-acc summary::after {
            content: "";
            width: 9px;
            height: 9px;
            border-right: 2px solid #D2F26A;
            border-bottom: 2px solid #D2F26A;
            transform: rotate(45deg);
            transition: transform .25s var(--ease);
            margin-right: 10px;
            flex-shrink: 0;
        }

        .faq-acc details[open] summary::after {
            transform: rotate(-135deg);
            margin-top: -4px;
        }

        .faq-acc summary:hover {
            background: rgba(255, 255, 255, .02);
            color: #fff;
        }

        .faq-acc .faq-a {
            padding: 0 24px 22px 8px;
            color: rgba(151, 163, 180, .8);
            line-height: 1.85;
            font-size: .92rem;
        }

        .backtop {
            position: fixed;
            right: 24px;
            bottom: 24px;
            z-index: 70;
            width: 48px;
            height: 48px;
            border-radius: 18px;
            display: flex;
            align-items: center;
            justify-content: center;
            color: #10150C;
            background: #D2F26A;
            border: 1px solid rgba(210, 242, 106, .4);
            box-shadow: 0 14px 40px rgba(0, 0, 0, .3), 0 0 20px rgba(210, 242, 106, .1);
            opacity: 0;
            visibility: hidden;
            transform: translateY(12px);
            transition: all .3s var(--ease);
        }

        .backtop.show {
            opacity: 1;
            visibility: visible;
            transform: none;
        }

        .backtop:hover {
            transform: translateY(-4px);
            box-shadow: 0 18px 44px rgba(0, 0, 0, .36), 0 0 28px rgba(210, 242, 106, .16);
        }

        @media (prefers-reduced-motion: reduce) {
            *,
            *:before,
            *:after {
                animation-duration: .01ms !important;
                animation-iteration-count: 1 !important;
                transition-duration: .01ms !important;
                scroll-behavior: auto !important;
            }
        }

        @media (max-width: 1023px) {
            .corner-stamp {
                display: none;
            }
        }

        @media (max-width: 639px) {
            .wrap {
                padding: 0 16px;
            }
            .article-hero {
                padding-top: 92px;
            }
            .article-title-ui {
                font-size: 1.75rem;
                line-height: 1.3;
            }
            .article-frame {
                border-radius: 18px;
                padding-left: 20px !important;
                padding-right: 20px !important;
            }
            .glass-nav-wrap {
                width: calc(100vw - 14px);
                top: 7px;
            }
            .glass-nav {
                border-radius: 24px;
                padding-left: 10px;
                padding-right: 10px;
            }
            .btn-primary,
            .btn-outline {
                padding: 11px 18px;
            }
            .backtop {
                right: 14px;
                bottom: 14px;
                width: 44px;
                height: 44px;
            }
        }

        @media (min-width: 640px) and (max-width: 767px) {
            .banner-copy {
                padding-left: 0;
            }
        }

/* roulang page: category1 */
:root{
    --night:#0A0D12;
    --night-soft:#070A0E;
    --panel:#11161D;
    --panel-2:#0D1117;
    --moon:#E7ECF2;
    --mist:#97A3B4;
    --signal:#D2F26A;
    --copper:#C08A5E;
    --line:rgba(255,255,255,.08);
    --line-strong:rgba(255,255,255,.14);
    --radius-xl:20px;
    --radius-card:16px;
    --radius-md:10px;
    --radius-full:999px;
    --shadow-card:0 20px 40px -30px rgba(0,0,0,.9),0 12px 30px -20px rgba(0,0,0,.7);
    --ease:cubic-bezier(.22,.61,.36,1);
  }
  *{box-sizing:border-box}
  html{scroll-behavior:smooth}
  body{
    margin:0;
    background:var(--night);
    color:var(--moon);
    font-family:"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Noto Sans SC",system-ui,-apple-system,"Segoe UI",sans-serif;
    font-size:16px;
    line-height:1.75;
    -webkit-font-smoothing:antialiased;
    overflow-x:hidden;
  }
  body *{min-width:0}
  a,button,input,select,textarea{
    font-family:inherit;
    color:inherit;
    outline:none;
    transition:all .3s var(--ease);
  }
  a{text-decoration:none}
  img{display:block;max-width:100%;height:auto}
  .wrap{
    width:100%;
    max-width:1200px;
    margin:0 auto;
    padding-left:clamp(1.25rem,4vw,2rem);
    padding-right:clamp(1.25rem,4vw,2rem);
  }
  section{
    scroll-margin-top:120px;
  }
  ::selection{
    background:var(--signal);
    color:var(--night);
  }
  .bg-night{background:var(--night)}
  .text-signal{color:var(--signal)}
  .text-mist{color:var(--mist)}
  .text-moon{color:var(--moon)}
  .text-copper{color:var(--copper)}
  .border-line{border-color:var(--line)}

  /* 星空点状底纹 */
  .star-field{
    position:fixed;
    inset:0;
    z-index:0;
    pointer-events:none;
    opacity:.65;
    background-image:
      radial-gradient(circle, rgba(255,255,255,.11) 0.5px, transparent 0.8px),
      radial-gradient(circle, rgba(210,242,106,.05) 1px, transparent 1.5px),
      radial-gradient(circle, rgba(255,255,255,.06) 0.6px, transparent 1px);
    background-size:88px 88px, 124px 124px, 220px 220px;
    background-position:0 0, 44px 32px, 90px 70px;
    mask-image:linear-gradient(to bottom, rgba(0,0,0,.8), rgba(0,0,0,.3) 90%, transparent);
  }
  .glow-fill{
    position:fixed;
    inset:0;
    z-index:0;
    pointer-events:none;
    background:
      radial-gradient(42rem 30rem at 12% 0%, rgba(210,242,106,.05), transparent 60%),
      radial-gradient(30rem 22rem at 90% 18%, rgba(192,138,94,.08), transparent 60%),
      radial-gradient(30rem 40rem at 50% 100%, rgba(151,163,180,.04), transparent 60%);
  }

  /* 玻璃 Dock 导航 */
  .glass-nav{
    position:fixed;
    top:16px;
    left:50%;
    z-index:50;
    width:min(1000px, calc(100vw - 20px));
    transform:translateX(-50%);
    background:rgba(13,17,23,.68);
    backdrop-filter:blur(18px) saturate(1.35);
    -webkit-backdrop-filter:blur(18px) saturate(1.35);
    border:1px solid rgba(255,255,255,.1);
    border-radius:999px;
    box-shadow:0 24px 60px -34px rgba(0,0,0,.95),0 6px 18px -10px rgba(0,0,0,.6), inset 0 1px 0 rgba(255,255,255,.06);
    margin-top:0;
  }
  .glass-nav .nav-link{
    position:relative;
    display:inline-flex;
    align-items:center;
    white-space:nowrap;
    padding:.68rem 1.1rem;
    font-size:.895rem;
    font-weight:600;
    color:var(--mist);
    border-radius:999px;
    transition:all .26s var(--ease);
  }
  .glass-nav .nav-link:hover{
    color:var(--moon);
    background:rgba(255,255,255,.055);
  }
  .glass-nav .nav-link.active{
    color:var(--signal);
    background:rgba(210,242,106,.08);
  }
  .glass-nav .nav-link.active::after{
    content:"";
    position:absolute;
    left:50%;
    bottom:1px;
    width:4px;
    height:4px;
    transform:translateX(-50%);
    border-radius:50%;
    background:var(--signal);
    box-shadow:0 0 12px var(--signal);
  }
  .btn-primary{
    display:inline-flex;
    align-items:center;
    gap:.55rem;
    justify-content:center;
    white-space:nowrap;
    background:var(--signal);
    color:var(--night);
    border:1px solid transparent;
    border-radius:999px;
    font-weight:800;
    font-size:.92rem;
    padding:.8rem 1.6rem;
    box-shadow:0 10px 36px -18px rgba(210,242,106,.35);
    transition:all .28s var(--ease);
    cursor:pointer;
  }
  .btn-primary:hover{
    background:#E0FD7B;
    transform:translateY(-2px);
    box-shadow:0 18px 38px -20px rgba(210,242,106,.48);
    border-color:rgba(210,242,106,.5);
  }
  .btn-primary:active{
    transform:translateY(0);
  }
  .btn-ghost{
    display:inline-flex;
    align-items:center;
    justify-content:center;
    gap:.5rem;
    white-space:nowrap;
    background:rgba(255,255,255,.02);
    color:var(--moon);
    border:1px solid rgba(231,236,242,.16);
    border-radius:999px;
    font-weight:600;
    font-size:.92rem;
    padding:.8rem 1.55rem;
    cursor:pointer;
  }
  .btn-ghost:hover{
    background:rgba(255,255,255,.08);
    border-color:rgba(210,242,106,.4);
    transform:translateY(-2px);
  }
  .btn-ghost:active{transform:translateY(0)}
  .btn-text{
    display:inline-flex;
    align-items:center;
    gap:.4rem;
    color:var(--signal);
    font-weight:700;
    font-size:.9rem;
    background:transparent;
    border:0;
    border-bottom:1px solid transparent;
    padding:0 0 .2rem;
    cursor:pointer;
  }
  .btn-text:hover{border-color:var(--signal)}

  /* 常见区块 */
  .section-pad{
    padding-top:clamp(82px,9vw,128px);
    padding-bottom:clamp(82px,9vw,128px);
  }
  .section-pad-t{
    padding-top:clamp(72px,8vw,118px);
  }
  .section-pad-b{
    padding-bottom:clamp(72px,8vw,118px);
  }
  .eyebrow{
    display:inline-flex;
    align-items:center;
    gap:.55rem;
    color:var(--signal);
    font-weight:800;
    letter-spacing:.04em;
    font-size:.78rem;
    text-transform:uppercase;
  }
  .eyebrow::before{
    content:"";
    width:22px;
    height:1px;
    background:var(--copper);
  }
  .section-title{
    font-size:clamp(1.9rem,3.4vw,2.7rem);
    line-height:1.16;
    letter-spacing:-.03em;
    font-weight:900;
    color:var(--moon);
  }
  .section-desc{
    font-size:.98rem;
    line-height:1.85;
    color:var(--mist);
  }
  .text-soft{color:var(--mist)}
  .tag{
    display:inline-flex;
    align-items:center;
    gap:.3rem;
    border-radius:999px;
    padding:.25rem .8rem;
    font-size:.76rem;
    font-weight:700;
    border:1px solid rgba(255,255,255,.1);
    color:var(--copper);
    background:rgba(255,255,255,.03);
  }
  .tag-signal{
    color:var(--signal);
    border-color:rgba(210,242,106,.22);
    background:rgba(210,242,106,.06);
  }
  .card{
    background:rgba(255,255,255,.028);
    border:1px solid var(--line);
    border-radius:var(--radius-card);
    transition:all .32s var(--ease);
  }
  .card:hover{
    border-color:rgba(255,255,255,.14);
    box-shadow:var(--shadow-card);
  }
  .panel{
    background:var(--panel);
    border-radius:var(--radius-xl);
    border:1px solid var(--line);
    box-shadow:0 30px 70px -50px rgba(0,0,0,.85);
  }
  .panel-soft{
    background:rgba(17,22,29,.72);
    border:1px solid rgba(255,255,255,.08);
    border-radius:16px;
  }
  .noise-divider{
    border:0;
    height:1px;
    background:linear-gradient(to right, transparent, rgba(255,255,255,.12) 18%, rgba(255,255,255,.08) 72%, transparent);
  }
  .scroll-mouse{
    display:grid;
    place-items:center;
    pointer-events:none;
  }
  .scroll-mouse .dot{
    width:14px;
    height:22px;
    border:1.5px solid rgba(231,236,242,.5);
    border-radius:99px;
    position:relative;
    display:block;
  }
  .scroll-mouse .dot::after{
    content:"";
    position:absolute;
    left:50%;
    top:4px;
    width:2px;
    height:6px;
    margin-left:-1px;
    background:var(--signal);
    border-radius:3px;
    animation:wheelMove 1.6s ease-in-out infinite;
  }
  @keyframes wheelMove{
    0%{transform:translateY(0);opacity:.7}
    55%{transform:translateY(6px);opacity:.2}
    100%{transform:translateY(0);opacity:.7}
  }
  .fade-up{
    opacity:0;
    transform:translateY(18px);
    animation:fadeUp .6s var(--ease) forwards;
  }
  .delay-1{animation-delay:.1s}
  .delay-2{animation-delay:.2s}
  .delay-3{animation-delay:.32s}
  @keyframes fadeUp{
    to{opacity:1;transform:none}
  }
  .focus-index{
    display:inline-flex;
    align-items:center;
    justify-content:center;
    font-size:.78rem;
    font-weight:800;
    line-height:1;
    padding:.55rem .7rem;
    border-radius:8px;
    color:var(--signal);
    background:rgba(210,242,106,.08);
    border:1px solid rgba(210,242,106,.18);
    letter-spacing:.02em;
  }
  .quote-num{
    font-family:"Georgia","Noto Serif SC",serif;
    font-size:2.4rem;
    line-height:1;
    color:rgba(192,138,94,.55);
    font-weight:400;
  }

  /* FAQ */
  .faq-item{
    border-bottom:1px solid rgba(255,255,255,.08);
  }
  .faq-item:first-child{
    border-top:1px solid rgba(255,255,255,.08);
  }
  .faq-question{
    display:flex;
    align-items:center;
    justify-content:space-between;
    gap:1.2rem;
    width:100%;
    text-align:left;
    padding:1.25rem .3rem;
    background:transparent;
    border:0;
    color:var(--moon);
    font-size:1rem;
    font-weight:700;
    cursor:pointer;
  }
  .faq-question .icon{
    flex:0 0 auto;
    width:30px;
    height:30px;
    display:grid;
    place-items:center;
    border-radius:50%;
    color:var(--signal);
    border:1px solid rgba(210,242,106,.24);
    background:rgba(210,242,106,.05);
    transition:transform .3s var(--ease), background .3s var(--ease);
  }
  .faq-item.active .faq-question .icon{
    transform:rotate(45deg);
  }
  .faq-answer{
    max-height:0;
    overflow:hidden;
    opacity:0;
    transition:max-height .38s var(--ease), opacity .3s var(--ease), padding .3s var(--ease);
    color:var(--mist);
    font-size:.94rem;
    line-height:1.9;
  }
  .faq-answer .answer-inner{
    padding:0 .3rem 1.4rem;
    max-width:60rem;
  }

  /* 卡片风格 */
  .shot-card{
    position:relative;
    overflow:hidden;
    border-radius:18px;
    border:1px solid rgba(255,255,255,.1);
    background:var(--night-soft);
  }
  .shot-card img{
    width:100%;
    object-fit:cover;
    transition:transform .7s var(--ease), opacity .4s ease;
  }
  .shot-card:hover img{
    transform:scale(1.03);
  }
  .shot-card .shot-cover{
    position:relative;
    overflow:hidden;
  }
  .shot-card .shot-body{
    padding:1.1rem 1.2rem 1.25rem;
  }
  .shot-card .shot-link{
    display:inline-flex;
    align-items:center;
    gap:.35rem;
    color:var(--signal);
    font-weight:700;
    font-size:.87rem;
  }
  .shot-card .shot-link::after{
    content:"";
    width:0;
    height:1px;
    background:var(--signal);
    transition:width .3s var(--ease);
  }
  .shot-card:hover .shot-link::after{
    width:18px;
  }

  /* 目录条目 */
  .toc-row{
    display:flex;
    gap:1rem;
    align-items:flex-start;
    padding:1.1rem 1.2rem;
    border:1px solid rgba(255,255,255,.06);
    border-radius:14px;
    background:rgba(255,255,255,.015);
    transition:all .25s var(--ease);
  }
  .toc-row:hover{
    border-color:rgba(210,242,106,.24);
    background:rgba(210,242,106,.03);
    transform:translateX(3px);
  }
  .toc-row + .toc-row{
    margin-top:10px;
  }

  /* mobile menu */
  .mobile-menu{
    max-height:0;
    overflow:hidden;
    opacity:0;
    pointer-events:none;
    position:absolute;
    top:calc(100% + 10px);
    left:50%;
    width:calc(100% - 8px);
    transform:translateX(-50%) translateY(-4px);
    background:rgba(13,17,23,.92);
    border:1px solid var(--line-strong);
    border-radius:22px;
    padding:0 1px;
    backdrop-filter:blur(20px);
    transition:all .36s var(--ease);
  }
  .mobile-menu.open{
    max-height:480px;
    opacity:1;
    pointer-events:auto;
    transform:translateX(-50%) translateY(0);
    box-shadow:0 30px 60px -30px rgba(0,0,0,.9);
  }
  .mobile-menu a{
    display:flex;
    align-items:center;
    justify-content:space-between;
    padding:1rem 1.2rem;
    border-radius:14px;
    color:var(--moon);
    font-weight:600;
    font-size:.96rem;
  }
  .mobile-menu a.active{color:var(--signal)}
  .mobile-menu a:hover{background:rgba(255,255,255,.05)}

  .float-cta{
    position:fixed;
    right:22px;
    bottom:26px;
    z-index:40;
    display:flex;
    align-items:center;
    gap:.75rem;
    opacity:0;
    transform:translateY(24px);
    pointer-events:none;
    transition:all .4s var(--ease);
  }
  .float-cta.visible{
    opacity:1;
    transform:none;
    pointer-events:auto;
  }
  .float-top{
    width:44px;
    height:44px;
    border-radius:50%;
    background:var(--panel);
    border:1px solid rgba(255,255,255,.12);
    color:var(--moon);
    display:grid;
    place-items:center;
    cursor:pointer;
    box-shadow:0 16px 36px -20px rgba(0,0,0,.9);
  }
  .float-top:hover{
    border-color:rgba(210,242,106,.5);
    color:var(--signal);
    transform:translateY(-2px);
  }
  .float-main{
    display:none;
  }
  @media(min-width:768px){
    .float-main{
      display:inline-flex;
      align-items:center;
      justify-content:center;
      font-size:.85rem;
      border-radius:999px;
      background:var(--signal);
      color:var(--night);
      font-weight:800;
      padding:.8rem 1.15rem;
      box-shadow:0 18px 40px -24px rgba(210,242,106,.5);
      cursor:pointer;
    }
  }
  @media(max-width:767px){
    .float-main{
      display:none;
    }
  }
  :focus-visible{
    outline:2px solid rgba(210,242,106,.7);
    outline-offset:3px;
  }
  @media(prefers-reduced-motion:reduce){
    *,*::before,*::after{
      animation-duration:.01ms !important;
      animation-iteration-count:1 !important;
      transition-duration:.01ms !important;
      scroll-behavior:auto !important;
    }
  }

/* roulang page: category2 */
:root{
    --bg:#0A0D12;
    --surface:#11161D;
    --text:#E7ECF2;
    --muted:#97A3B4;
    --signal:#D2F26A;
    --copper:#C08A5E;
    --line:rgba(255,255,255,.08);
    --radius-lg:20px;
    --radius-md:16px;
    --radius-sm:8px;
    --shadow:0 20px 60px rgba(0,0,0,.35);
  }
  *{box-sizing:border-box}
  html{scroll-behavior:smooth;scroll-padding-top:110px}
  body{
    margin:0;
    background:var(--bg);
    color:var(--text);
    font-family:"PingFang SC","Microsoft YaHei","Noto Sans SC",system-ui,-apple-system,sans-serif;
    -webkit-font-smoothing:antialiased;
    line-height:1.75;
    letter-spacing:.01em;
  }
  body::before{
    content:"";
    position:fixed;
    inset:0;
    z-index:-1;
    pointer-events:none;
    background:
      radial-gradient(circle at 12% 18%, rgba(210,242,106,.05), transparent 38%),
      radial-gradient(circle at 88% 8%, rgba(192,138,94,.05), transparent 32%);
  }
  a{color:inherit;text-decoration:none}
  img{max-width:100%;display:block}
  ::selection{background:rgba(210,242,106,.25);color:#fff}
  .wrap{
    width:min(1200px,92vw);
    margin-left:auto;
    margin-right:auto;
  }
  .glass-nav{
    position:fixed;
    top:16px;
    left:50%;
    transform:translateX(-50%);
    width:min(900px,92vw);
    z-index:90;
    border:1px solid rgba(255,255,255,.08);
    border-radius:999px;
    background:rgba(8,11,16,.72);
    backdrop-filter:blur(18px);
    -webkit-backdrop-filter:blur(18px);
    box-shadow:0 14px 40px rgba(0,0,0,.28);
    transition:background .4s ease,border-color .3s ease;
  }
  @keyframes navIn{
    from{opacity:0;transform:translateX(-50%) translateY(-14px)}
    to{opacity:1;transform:translateX(-50%) translateY(0)}
  }
  .glass-nav{animation:navIn .7s cubic-bezier(.22,1,.36,1) both}
  .nav-link{
    position:relative;
    display:inline-flex;
    align-items:center;
    padding:.55rem .92rem;
    border-radius:999px;
    font-size:.9rem;
    font-weight:500;
    color:var(--muted);
    white-space:nowrap;
    transition:color .25s ease,background .25s ease,transform .25s ease;
  }
  .nav-link:hover{color:#fff;background:rgba(255,255,255,.06)}
  .nav-link.active{
    color:var(--signal);
    background:rgba(210,242,106,.08);
  }
  .nav-link.active::after{
    content:"";
    position:absolute;
    left:50%;
    bottom:2px;
    width:4px;height:4px;
    border-radius:999px;
    background:var(--signal);
    transform:translateX(-50%);
    box-shadow:0 0 12px rgba(210,242,106,.9);
  }
  .btn-primary{
    display:inline-flex;
    align-items:center;
    justify-content:center;
    gap:.5rem;
    padding:.8rem 1.7rem;
    border-radius:999px;
    background:var(--signal);
    color:#11161D;
    font-weight:700;
    font-size:.92rem;
    line-height:1;
    border:1px solid rgba(210,242,106,.3);
    transition:background .3s ease,border-color .3s ease,box-shadow .3s ease,transform .3s ease;
    box-shadow:0 10px 28px rgba(210,242,106,.12);
  }
  .btn-primary:hover{
    background:#E6FF8B;
    transform:translateY(-2px);
    box-shadow:0 16px 32px rgba(210,242,106,.18);
  }
  .btn-outline{
    display:inline-flex;
    align-items:center;
    justify-content:center;
    gap:.5rem;
    padding:.8rem 1.6rem;
    border-radius:999px;
    background:rgba(255,255,255,.02);
    color:var(--text);
    font-size:.92rem;
    font-weight:600;
    border:1px solid rgba(255,255,255,.16);
    transition:background .3s ease,border-color .3s ease,color .3s ease,transform .3s ease;
  }
  .btn-outline:hover{
    background:rgba(255,255,255,.1);
    border-color:var(--signal);
    color:var(--signal);
    transform:translateY(-1px);
  }
  .hero-badge{
    display:inline-flex;
    align-items:center;
    gap:8px;
    padding:.4rem .95rem;
    border-radius:999px;
    border:1px solid rgba(192,138,94,.25);
    background:rgba(192,138,94,.08);
    color:#E4C8A8;
    font-size:.82rem;
    font-weight:500;
  }
  .hero-badge span{
    width:6px;height:6px;
    border-radius:999px;
    background:var(--copper);
    box-shadow:0 0 12px rgba(192,138,94,.7);
  }
  .section-title{
    font-size:clamp(1.75rem,3.6vw,2.6rem);
    line-height:1.18;
    letter-spacing:-.02em;
    font-weight:800;
    color:#F1F5FA;
  }
  .section-lead{
    color:var(--muted);
    line-height:1.85;
    font-size:1.02rem;
    max-width:720px;
  }
  .card{
    background:linear-gradient(180deg,rgba(255,255,255,.05),rgba(255,255,255,.018));
    border:1px solid rgba(255,255,255,.07);
    border-radius:var(--radius-lg);
    transition:transform .4s cubic-bezier(.22,1,.36,1),border-color .3s ease,background .3s ease,box-shadow .3s ease;
  }
  .card:hover{
    transform:translateY(-4px);
    border-color:rgba(210,242,106,.35);
    box-shadow:0 22px 48px rgba(0,0,0,.36);
  }
  .soft-divider{
    height:1px;
    border:0;
    background:linear-gradient(90deg,transparent,rgba(255,255,255,.1),transparent);
    margin:0;
  }
  .noise-divider{
    height:1px;
    background:rgba(255,255,255,.07);
  }
  .faq-item{
    border-bottom:1px solid rgba(255,255,255,.07);
    transition:background .3s ease;
  }
  .faq-item:first-of-type{border-top:1px solid rgba(255,255,255,.07)}
  .faq-item summary{
    list-style:none;
    cursor:pointer;
    display:flex;
    align-items:center;
    justify-content:space-between;
    gap:18px;
    padding:1.3rem .2rem;
    color:var(--text);
    font-size:1.03rem;
    font-weight:600;
    transition:color .3s ease;
    position:relative;
  }
  .faq-item summary::-webkit-details-marker{display:none}
  .faq-item summary::before{
    content:"";
    width:6px;height:6px;
    border-radius:999px;
    background:rgba(255,255,255,.22);
    margin-right:14px;
    transition:background .3s ease,box-shadow .3s ease;
  }
  .faq-item[open] summary{color:var(--signal)}
  .faq-item[open] summary::before{
    background:var(--signal);
    box-shadow:0 0 14px rgba(210,242,106,.7);
  }
  .faq-answer{
    max-width:860px;
    padding:.15rem .2rem 1.4rem 1.25rem;
    color:var(--muted);
    line-height:1.85;
    font-size:.97rem;
  }
  .index-num{
    font-family:Georgia,'Times New Roman',serif;
    font-style:italic;
    color:var(--copper);
    font-size:.9rem;
  }
  .dot-bg{
    background-image:
      radial-gradient(circle at 1px 1px, rgba(231,236,242,.18) 1px, transparent 1px);
    background-size:22px 22px;
  }
  .mark-blur{backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px)}
  @keyframes bob{
    0%,100%{transform:translateY(0);opacity:.9}
    50%{transform:translateY(8px);opacity:.45}
  }
  .bob{animation:bob 1.4s ease-in-out infinite}
  .fadeup{opacity:0;transform:translateY(18px);animation:fadeUp .6s cubic-bezier(.22,1,.36,1) forwards}
  .fadeup.d1{animation-delay:.08s}
  .fadeup.d2{animation-delay:.16s}
  .fadeup.d3{animation-delay:.24s}
  @keyframes fadeUp{
    to{opacity:1;transform:translateY(0)}
  }
  .reading-main p{color:#B7C1CE;margin-bottom:1.35em;font-size:1rem;line-height:1.9}
  .reading-main strong{color:var(--text);font-weight:700}
  .reading-main h3{color:var(--text);font-weight:700;font-size:1.16rem;margin:2em 0 .8em}
  .side-note{
    border-left:2px solid rgba(210,242,106,.55);
    background:rgba(210,242,106,.035);
  }
  .move-btn{
    position:fixed;
    right:22px;
    bottom:22px;
    width:46px;height:46px;
    border-radius:999px;
    border:1px solid rgba(210,242,106,.35);
    background:rgba(14,18,24,.82);
    backdrop-filter:blur(14px);
    color:var(--signal);
    display:flex;
    align-items:center;
    justify-content:center;
    z-index:30;
    transition:opacity .3s ease,transform .3s ease,background .3s ease;
    box-shadow:0 8px 28px rgba(0,0,0,.35);
    opacity:0;
    pointer-events:none;
  }
  .move-btn.show{opacity:1;pointer-events:auto;transform:translateY(0)}
  .move-btn:hover{background:#17202B;transform:translateY(-3px)}
  input:focus,button:focus,a:focus,summary:focus{
    outline:2px solid rgba(210,242,106,.75);
    outline-offset:3px;
  }
  #mobileMenu{transition:opacity .25s ease,transform .25s ease}
  #mobileMenu.open{opacity:1;transform:translateY(0);pointer-events:auto}
  #mobileMenu{opacity:0;transform:translateY(-8px);pointer-events:none}
  @media (max-width:1023px){
    .glass-nav{width:calc(100% - 28px)}
  }
  @media (max-width:640px){
    body{font-size:.98rem}
    .faq-answer{padding-left:.9rem}
  }
  @media (prefers-reduced-motion: reduce){
    *,*::before,*::after{
      animation-duration:.001s!important;
      transition-duration:.001s!important;
      scroll-behavior:auto!important;
    }
    .fadeup{opacity:1;transform:none}
  }

/* roulang page: category3 */
:root {
    --bg: #0A0D12;
    --surface: #11161D;
    --elevated: #161D26;
    --moon: #E7ECF2;
    --mist: #97A3B4;
    --signal: #D2F26A;
    --copper: #C08A5E;
    --line: rgba(255, 255, 255, 0.08);
    --line-soft: rgba(255, 255, 255, 0.05);
    --panel-radius: 20px;
    --radius: 16px;
    --inner-radius: 10px;
    --shadow-low: 0 12px 36px rgba(0, 0, 0, 0.22);
    --shadow-raised: 0 24px 60px rgba(0, 0, 0, 0.3);
    --font-sans: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", -apple-system, BlinkMacSystemFont, sans-serif;
  }

  * {
    box-sizing: border-box;
  }

  html {
    scroll-behavior: smooth;
  }

  body {
    background-color: var(--bg);
    color: var(--moon);
    font-family: var(--font-sans);
    line-height: 1.7;
    margin: 0;
    overflow-x: hidden;
  }

  body::before {
    content: "";
    position: fixed;
    inset: 0;
    z-index: 0;
    pointer-events: none;
    background-image:
      radial-gradient(circle at 18% 26%, rgba(255, 255, 255, 0.055) 1px, transparent 1.6px),
      radial-gradient(circle at 72% 18%, rgba(255, 255, 255, 0.04) 1px, transparent 1.6px),
      radial-gradient(circle at 84% 62%, rgba(255, 255, 255, 0.05) 1px, transparent 1.6px),
      radial-gradient(circle at 30% 82%, rgba(255, 255, 255, 0.03) 1px, transparent 1.6px);
    background-size: 42px 42px, 57px 57px, 73px 73px, 35px 35px;
    opacity: 0.55;
  }

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

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

  button,
  input {
    font-family: inherit;
  }

  h1,
  h2,
  h3,
  h4 {
    font-family: var(--font-sans);
    margin-top: 0;
  }

  .bg-star {
    background-color: var(--bg);
  }

  .wrap {
    max-width: 1200px;
    margin-left: auto;
    margin-right: auto;
    padding-left: 24px;
    padding-right: 24px;
    width: 100%;
  }

  .section-space {
    padding-top: clamp(80px, 11vw, 132px);
    padding-bottom: clamp(80px, 11vw, 132px);
  }

  .surface-panel {
    background: rgba(17, 22, 29, 0.78);
    border: 1px solid var(--line);
    border-radius: var(--panel-radius);
  }

  .glass-nav {
    position: fixed;
    top: 16px;
    left: 50%;
    transform: translateX(-50%);
    width: min(1100px, 94vw);
    z-index: 80;
    background: rgba(10, 13, 18, 0.76);
    backdrop-filter: blur(18px);
    -webkit-backdrop-filter: blur(18px);
    border: 1px solid var(--line);
    border-radius: 999px;
    box-shadow: 0 16px 38px rgba(0, 0, 0, 0.24);
  }

  .nav-link {
    position: relative;
    display: inline-flex;
    align-items: center;
    gap: 6px;
    justify-content: center;
    padding: 9px 16px;
    border-radius: 999px;
    font-size: 0.9rem;
    font-weight: 550;
    color: var(--mist);
    white-space: nowrap;
    transition: color 0.22s ease, background 0.22s ease, border-color 0.22s ease;
  }

  .nav-link:hover {
    color: var(--moon);
    background: rgba(255, 255, 255, 0.045);
  }

  .nav-link.active {
    color: var(--signal);
    background: rgba(210, 242, 106, 0.07);
  }

  .nav-link.active::after {
    content: "";
    position: absolute;
    left: 50%;
    bottom: 2px;
    transform: translateX(-50%);
    width: 4px;
    height: 4px;
    border-radius: 999px;
    background: var(--signal);
    box-shadow: 0 0 12px rgba(210, 242, 106, 0.85);
  }

  .btn-primary,
  .btn-outline,
  .btn-ghost {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    border-radius: 999px;
    font-weight: 750;
    letter-spacing: 0.02em;
    border: 1px solid transparent;
    cursor: pointer;
    transition: transform 0.2s ease, background 0.2s ease, color 0.2s ease, border-color 0.2s ease, box-shadow 0.2s ease;
  }

  .btn-primary {
    background: var(--signal);
    color: #0A0D12;
    padding: 12px 24px;
    font-size: 0.92rem;
    box-shadow: 0 12px 30px rgba(210, 242, 106, 0.13);
  }

  .btn-primary:hover {
    background: #DEFB84;
    transform: translateY(-2px);
    box-shadow: 0 16px 34px rgba(210, 242, 106, 0.19);
  }

  .btn-outline {
    border-color: rgba(255, 255, 255, 0.22);
    color: var(--moon);
    padding: 12px 22px;
    font-size: 0.92rem;
  }

  .btn-outline:hover {
    border-color: var(--signal);
    color: var(--signal);
    background: rgba(210, 242, 106, 0.06);
    transform: translateY(-1px);
  }

  .btn-ghost {
    color: var(--mist);
    padding: 10px 14px;
    font-size: 0.9rem;
  }

  .btn-ghost:hover {
    color: var(--moon);
  }

  .mobile-panel {
    position: fixed;
    top: 82px;
    left: 50%;
    transform: translateX(-50%);
    width: min(94vw, 480px);
    z-index: 79;
    background: rgba(13, 17, 23, 0.96);
    border: 1px solid var(--line);
    border-radius: 20px;
    padding: 10px;
    display: flex;
    flex-direction: column;
    gap: 4px;
    box-shadow: 0 28px 70px rgba(0, 0, 0, 0.36);
    opacity: 0;
    visibility: hidden;
    transform: translateX(-50%) translateY(-10px);
    transition: opacity 0.22s ease, transform 0.22s ease, visibility 0.22s;
  }

  .mobile-panel.open {
    opacity: 1;
    visibility: visible;
    transform: translateX(-50%) translateY(0);
  }

  .mobile-panel a {
    padding: 13px 14px;
    border-radius: 12px;
    color: var(--mist);
    font-weight: 600;
    transition: color 0.2s, background 0.2s;
  }

  .mobile-panel a:hover,
  .mobile-panel a.active {
    background: rgba(210, 242, 106, 0.07);
    color: var(--signal);
  }

  .hero-section {
    position: relative;
    z-index: 2;
    padding-top: 170px;
    padding-bottom: 70px;
    min-height: 96vh;
    display: flex;
    align-items: center;
    color: var(--moon);
    isolation: isolate;
    overflow: hidden;
  }

  .hero-section::before {
    content: "";
    position: absolute;
    inset: 0;
    z-index: -2;
    background-image:
      linear-gradient(90deg, rgba(10, 13, 18, 0.98) 0%, rgba(10, 13, 18, 0.78) 46%, rgba(10, 13, 18, 0.25) 100%),
      url('/assets/images/backpic/back-2.webp');
    background-position: center;
    background-size: cover;
    background-repeat: no-repeat;
  }

  .hero-section::after {
    content: "";
    position: absolute;
    inset: auto 0 0 0;
    height: 110px;
    z-index: -1;
    background: linear-gradient(180deg, transparent, #0A0D12 100%);
  }

  .eyebrow-pill {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    border: 1px solid rgba(255, 255, 255, 0.12);
    background: rgba(255, 255, 255, 0.045);
    border-radius: 999px;
    padding: 8px 16px;
    font-size: 0.84rem;
    color: var(--mist);
    font-weight: 550;
    letter-spacing: 0.02em;
  }

  .eyebrow-pill i {
    display: inline-block;
    width: 7px;
    height: 7px;
    border-radius: 999px;
    background: var(--signal);
    box-shadow: 0 0 14px rgba(210, 242, 106, 0.9);
  }

  .hero-title {
    font-size: clamp(42px, 7vw, 76px);
    font-weight: 900;
    letter-spacing: -0.05em;
    line-height: 1.08;
    margin: 22px 0 22px;
    color: var(--moon);
  }

  .hero-title .text-signal {
    color: var(--signal);
  }

  .hero-lead {
    font-size: clamp(16px, 2vw, 18px);
    line-height: 1.85;
    color: var(--mist);
    max-width: 640px;
    margin-top: 4px;
  }

  .hero-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin-top: 24px;
  }

  .tag-pill {
    display: inline-flex;
    align-items: center;
    border-radius: 999px;
    border: 1px solid rgba(255, 255, 255, 0.11);
    background: rgba(255, 255, 255, 0.04);
    color: var(--mist);
    padding: 6px 14px;
    font-size: 0.8rem;
    font-weight: 550;
    transition: border-color 0.2s, color 0.2s;
  }

  .tag-pill:hover {
    border-color: rgba(210, 242, 106, 0.5);
    color: var(--moon);
  }

  .hero-action {
    display: flex;
    flex-wrap: wrap;
    gap: 14px;
    align-items: center;
    margin-top: 34px;
  }

  .hero-meta-line {
    margin-top: 48px;
    display: flex;
    flex-wrap: wrap;
    gap: 28px;
    color: var(--mist);
    font-size: 0.88rem;
  }

  .hero-meta-line strong {
    display: block;
    color: var(--moon);
    font-size: 1.18rem;
    font-weight: 750;
  }

  .scroll-cue {
    position: absolute;
    bottom: 34px;
    left: 50%;
    transform: translateX(-50%);
    color: var(--mist);
    font-size: 0.75rem;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
    z-index: 5;
    letter-spacing: 0.18em;
  }

  .scroll-cue span {
    width: 1px;
    height: 42px;
    background: radial-gradient(circle at 50% 0%, rgba(255, 255, 255, 0.3), transparent 78%);
    overflow: hidden;
    position: relative;
  }

  .scroll-cue span::after {
    content: "";
    position: absolute;
    top: -100%;
    left: 0;
    width: 100%;
    height: 50%;
    background: var(--signal);
    box-shadow: 0 0 8px rgba(210, 242, 106, 0.7);
    animation: scrollDown 1.4s infinite ease;
  }

  @keyframes scrollDown {
    0% { top: -60%; }
    60% { top: 120%; }
    100% { top: 120%; }
  }

  .hero-visual-card {
    border-radius: 24px;
    overflow: hidden;
    border: 1px solid rgba(255, 255, 255, 0.11);
    box-shadow: 0 30px 60px rgba(0, 0, 0, 0.38);
    position: relative;
  }

  .hero-visual-card img {
    height: 420px;
    width: 100%;
    object-fit: cover;
  }

  .hero-visual-card .vc-layer {
    position: absolute;
    left: 12px;
    right: 12px;
    bottom: 12px;
    backdrop-filter: blur(8px);
    background: rgba(10, 13, 18, 0.5);
    border: 1px solid rgba(255, 255, 255, 0.12);
    border-radius: 14px;
    padding: 12px 14px;
    color: var(--moon);
    font-size: 0.88rem;
  }

  .section-heading {
    display: flex;
    flex-direction: column;
    gap: 10px;
  }

  .kicker {
    color: var(--signal);
    font-size: 0.84rem;
    letter-spacing: 0.22em;
    font-weight: 750;
  }

  .section-title {
    font-size: clamp(30px, 5vw, 48px);
    line-height: 1.18;
    letter-spacing: -0.02em;
    margin-bottom: 18px;
    color: var(--moon);
  }

  .section-lead {
    color: var(--mist);
    max-width: 650px;
    font-size: 1rem;
    line-height: 1.8;
  }

  .split-guide {
    display: grid;
    grid-template-columns: 0.82fr 1.18fr;
    gap: clamp(30px, 6vw, 80px);
    align-items: center;
  }

  .named-index {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    color: var(--copper);
    font-weight: 800;
    letter-spacing: 0.14em;
    font-size: 0.86rem;
  }

  .guide-copy h2 {
    font-size: clamp(28px, 4vw, 44px);
    line-height: 1.2;
    margin-top: 12px;
    margin-bottom: 20px;
    color: var(--moon);
    letter-spacing: -0.02em;
  }

  .guide-copy p {
    color: var(--mist);
    line-height: 1.9;
    margin-bottom: 18px;
  }

  .mini-note-list {
    list-style: none;
    padding: 0;
    margin: 0;
    display: grid;
    gap: 16px;
  }

  .mini-note-list li {
    display: grid;
    grid-template-columns: 30px 1fr;
    gap: 12px;
    align-items: start;
    padding: 18px 16px;
    border: 1px solid rgba(255, 255, 255, 0.08);
    background: rgba(255, 255, 255, 0.02);
    border-radius: 16px;
  }

  .mini-note-list .no {
    width: 30px;
    height: 30px;
    border-radius: 999px;
    background: rgba(210, 242, 106, 0.1);
    color: var(--signal);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 12px;
    font-weight: 800;
  }

  .stage-grid {
    display: grid;
    grid-template-columns: repeat(12, 1fr);
    gap: 18px;
  }

  .stage-card {
    grid-column: span 4;
    background: rgba(17, 22, 29, 0.82);
    border: 1px solid var(--line);
    border-radius: 20px;
    padding: 24px;
    transition: transform 0.24s ease, border-color 0.24s ease, box-shadow 0.24s ease;
    position: relative;
  }

  .stage-card:hover {
    transform: translateY(-4px);
    border-color: rgba(210, 242, 106, 0.32);
    box-shadow: 0 18px 40px rgba(0, 0, 0, 0.26);
  }

  .stage-card.wide-card {
    grid-column: span 4;
  }

  .stage-num {
    color: var(--copper);
    font-size: 0.82rem;
    font-weight: 800;
    letter-spacing: 0.16em;
    display: flex;
    align-items: center;
    gap: 10px;
  }

  .stage-card h3 {
    font-size: 21px;
    color: var(--moon);
    margin: 12px 0 10px;
    line-height: 1.35;
  }

  .stage-card p {
    color: var(--mist);
    font-size: 0.95rem;
    line-height: 1.75;
    margin-bottom: 0;
  }

  .icon-orbit {
    width: 42px;
    height: 42px;
    border-radius: 50%;
    border: 1px solid var(--line);
    background: rgba(210, 242, 106, 0.07);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    color: var(--signal);
    font-size: 18px;
    margin-bottom: 10px;
  }

  .wide-note {
    background: rgba(210, 242, 106, 0.055);
    border-color: rgba(210, 242, 106, 0.13);
  }

  .reader-flow {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 15px;
    position: relative;
  }

  .flow-item {
    background: rgba(17, 22, 29, 0.75);
    border: 1px solid var(--line);
    border-radius: 16px;
    padding: 20px;
    text-align: center;
    transition: transform 0.2s, border-color 0.2s;
  }

  .flow-item:hover {
    transform: translateY(-3px);
    border-color: rgba(210, 242, 106, 0.25);
  }

  .flow-step {
    font-size: 0.8rem;
    font-weight: 800;
    letter-spacing: 0.2em;
    color: var(--copper);
  }

  .flow-item h3 {
    font-size: 17px;
    color: var(--moon);
    margin-bottom: 6px;
    line-height: 1.45;
  }

  .flow-item p {
    font-size: 0.85rem;
    color: var(--mist);
    line-height: 1.65;
    margin-bottom: 0;
  }

  .feature-block {
    display: grid;
    grid-template-columns: 0.9fr 1.1fr;
    gap: 32px;
    align-items: stretch;
  }

  .feature-main {
    min-height: 100%;
  }

  .feature-facts {
    display: flex;
    flex-direction: column;
    gap: 14px;
  }

  .fact-row {
    padding: 20px;
    border-radius: 18px;
    border: 1px solid var(--line);
    background: rgba(255, 255, 255, 0.02);
  }

  .fact-row strong {
    display: block;
    font-size: 19px;
    color: var(--moon);
    margin-bottom: 6px;
  }

  .fact-row p {
    color: var(--mist);
    font-size: 0.9rem;
    line-height: 1.7;
    margin: 0;
  }

  .cover-full {
    border-radius: 20px;
    overflow: hidden;
    border: 1px solid var(--line);
    position: relative;
    min-height: 280px;
    background: #141b24;
  }

  .cover-full img {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    opacity: 0.8;
    transition: transform 0.4s ease;
  }

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

  .cover-overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(180deg, transparent 20%, rgba(10, 13, 18, 0.9) 100%);
    display: flex;
    align-items: flex-end;
    padding: 24px;
  }

  .cover-title {
    font-size: 22px;
    font-weight: 850;
    color: var(--moon);
    line-height: 1.35;
  }

  .num-list {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    border: 1px solid var(--line);
    border-radius: 24px;
    overflow: hidden;
    background: rgba(17, 22, 29, 0.42);
  }

  .num-item {
    padding: 28px;
    border-bottom: 1px solid var(--line-soft);
    border-right: 1px solid var(--line-soft);
    transition: background 0.25s ease;
  }

  .num-item:hover {
    background: rgba(210, 242, 106, 0.045);
  }

  .num-item:nth-child(odd) {
    border-right: 1px solid var(--line-soft);
  }

  .num-item span {
    font-size: 0.86rem;
    font-weight: 800;
    letter-spacing: 0.14em;
    color: var(--copper);
  }

  .num-item h3 {
    margin: 8px 0 8px;
    color: var(--moon);
    font-size: 23px;
    font-weight: 800;
  }

  .num-item p {
    color: var(--mist);
    font-size: 0.94rem;
    line-height: 1.8;
    margin: 0;
  }

  .scene-card {
    border: 1px solid var(--line);
    background: rgba(17, 22, 29, 0.76);
    border-radius: 22px;
    overflow: hidden;
    display: flex;
    flex-direction: column;
    transition: transform 0.24s ease, border-color 0.24s ease, box-shadow 0.24s ease;
  }

  .scene-card:hover {
    transform: translateY(-4px);
    border-color: rgba(210, 242, 106, 0.27);
    box-shadow: 0 22px 52px rgba(0, 0, 0, 0.27);
  }

  .scene-card img {
    height: 190px;
    object-fit: cover;
    width: 100%;
  }

  .scene-content {
    padding: 20px;
    display: flex;
    flex-direction: column;
    gap: 9px;
  }

  .scene-content h3 {
    color: var(--moon);
    font-size: 19px;
    margin: 0;
    line-height: 1.4;
  }

  .scene-content p {
    color: var(--mist);
    font-size: 0.9rem;
    line-height: 1.7;
    margin: 0;
  }

  .scene-link {
    margin-top: 10px;
    color: var(--signal);
    font-size: 0.86rem;
    font-weight: 750;
    display: inline-flex;
    align-items: center;
    gap: 6px;
    transition: gap 0.2s;
  }

  .scene-link:hover {
    gap: 10px;
  }

  .faq-wrap {
    max-width: 880px;
    margin: 0 auto;
    border-top: 1px solid var(--line);
  }

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

  .faq-item summary {
    list-style: none;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 22px;
    cursor: pointer;
    padding: 22px 6px;
    font-weight: 750;
    font-size: 16px;
    color: var(--moon);
    transition: color 0.2s ease;
  }

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

  .faq-item summary svg {
    flex: 0 0 auto;
    color: var(--mist);
    transform: rotate(0deg);
    transition: transform 0.24s ease, color 0.2s;
  }

  .faq-item[open] summary {
    color: var(--signal);
  }

  .faq-item[open] summary svg {
    transform: rotate(45deg);
    color: var(--signal);
  }

  .faq-answer {
    padding: 0 36px 22px 10px;
    color: var(--mist);
    font-size: 0.94rem;
    line-height: 1.85;
    max-width: 780px;
  }

  .cta-panel {
    background: rgba(17, 22, 29, 0.8);
    border: 1px solid rgba(210, 242, 106, 0.12);
    border-radius: 28px;
    padding: clamp(36px, 6vw, 68px);
    position: relative;
    overflow: hidden;
    text-align: center;
  }

  .cta-panel::before {
    content: "";
    position: absolute;
    inset: 0;
    background:
      radial-gradient(circle at 16% 20%, rgba(210, 242, 106, 0.08), transparent 35%),
      radial-gradient(circle at 85% 80%, rgba(192, 138, 94, 0.1), transparent 35%);
    pointer-events: none;
  }

  .cta-panel h2 {
    position: relative;
    font-size: clamp(26px, 4vw, 42px);
    letter-spacing: -0.02em;
    line-height: 1.22;
    color: var(--moon);
    margin-bottom: 14px;
  }

  .cta-panel p {
    position: relative;
    max-width: 620px;
    margin: 0 auto 28px;
    color: var(--mist);
    font-size: 1rem;
  }

  .reveal {
    opacity: 0;
    transform: translateY(22px);
    transition: opacity 0.55s ease, transform 0.55s ease;
  }

  .reveal.in-view {
    opacity: 1;
    transform: none;
  }

  .noise-divider {
    height: 1px;
    background: linear-gradient(90deg, transparent 0%, rgba(255, 255, 255, 0.12) 25%, rgba(255, 255, 255, 0.12) 75%, transparent 100%);
  }

  .footer-brand-desc {
    color: var(--mist);
    max-width: 260px;
    line-height: 1.75;
    font-size: 0.95rem;
  }

  .float-actions {
    position: fixed;
    right: 24px;
    bottom: 32px;
    z-index: 60;
    display: flex;
    flex-direction: column;
    gap: 10px;
    opacity: 0;
    visibility: hidden;
    transform: translateY(12px);
    transition: opacity 0.2s, visibility 0.2s, transform 0.2s;
  }

  .float-actions.show {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
  }

  .float-actions a {
    width: 44px;
    height: 44px;
    border-radius: 999px;
    background: rgba(17, 22, 29, 0.92);
    border: 1px solid var(--line);
    backdrop-filter: blur(10px);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--mist);
    font-size: 1.1rem;
    transition: color 0.2s, border-color 0.2s, transform 0.2s;
  }

  .float-actions a:hover {
    color: var(--signal);
    border-color: rgba(210, 242, 106, 0.38);
    transform: translateY(-3px);
  }

  @media (max-width: 992px) {
    .split-guide {
      grid-template-columns: 1fr;
      gap: 26px;
    }

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

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

    .hero-section {
      padding-top: 160px;
      padding-bottom: 70px;
    }

    .stage-card {
      grid-column: span 6;
    }
  }

  @media (max-width: 700px) {
    .wrap {
      padding-left: 18px;
      padding-right: 18px;
    }

    .section-space {
      padding-top: 70px;
      padding-bottom: 70px;
    }

    .hero-title {
      font-size: 38px;
      line-height: 1.12;
    }

    .hero-meta-line {
      gap: 14px;
      font-size: 0.82rem;
    }

    .num-list {
      grid-template-columns: 1fr;
    }

    .num-item {
      border-right: 0 !important;
      border-bottom: 1px solid var(--line-soft);
    }

    .stage-card {
      grid-column: 1 / -1;
    }

    .reader-flow {
      grid-template-columns: 1fr;
    }
  }

  @media (prefers-reduced-motion: reduce) {
    * {
      animation: none !important;
      transition: none !important;
    }

    html {
      scroll-behavior: auto;
    }
  }