/* roulang page: index */
:root{
    --ink:#0E1A23;
    --ink-2:#1B2C38;
    --muted:#5E7180;
    --paper:#F6F4EF;
    --surface:#FFFFFF;
    --brand:#0F5F5A;
    --brand-deep:#0A4744;
    --brand-soft:#E8F1EF;
    --accent:#C27A34;
    --accent-soft:#F6EADF;
    --line:rgba(14,26,35,.09);
    --line-strong:rgba(14,26,35,.16);
    --radius:14px;
    --radius-sm:10px;
    --shadow-sm:0 2px 10px rgba(14,26,35,.05);
    --shadow-md:0 14px 34px rgba(14,26,35,.10);
    --shadow-lg:0 28px 70px rgba(14,26,35,.16);
    --font-sans:"Inter","PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,-apple-system,sans-serif;
    --font-serif:"Noto Serif SC","Songti SC","Source Han Serif SC","STSong",serif;
  }

  *,*::before,*::after{box-sizing:border-box}
  html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
  body{
    margin:0;
    font-family:var(--font-sans);
    background:var(--paper);
    color:var(--ink);
    font-size:16px;
    line-height:1.78;
    -webkit-font-smoothing:antialiased;
    text-rendering:optimizeLegibility;
  }
  img{display:block;max-width:100%;height:auto}
  a{color:inherit;text-decoration:none}
  button,input,textarea,select{font:inherit;color:inherit}
  ul,ol{margin:0;padding:0;list-style:none}
  h1,h2,h3,h4,p{margin:0}
  :focus-visible{outline:2px solid var(--brand);outline-offset:3px;border-radius:6px}

  .wrap{width:100%;max-width:1180px;margin:0 auto;padding:0 24px}

  /* ---------- header ---------- */
  .site-header{
    position:sticky;top:0;z-index:60;
    background:rgba(246,244,239,.9);
    -webkit-backdrop-filter:saturate(180%) blur(12px);
    backdrop-filter:saturate(180%) blur(12px);
    border-bottom:1px solid transparent;
    transition:border-color .25s ease, box-shadow .25s ease, background .25s ease;
  }
  .site-header.is-scrolled{
    border-bottom-color:var(--line);
    box-shadow:0 6px 22px rgba(14,26,35,.07);
    background:rgba(246,244,239,.97);
  }
  .header-inner{display:flex;align-items:center;gap:24px;min-height:64px}
  .brand{display:inline-flex;align-items:center;gap:10px;flex-shrink:0}
  .brand-mark{
    width:32px;height:32px;border-radius:9px;
    display:grid;place-items:center;
    background:linear-gradient(140deg,var(--brand),#17a094);
    color:#fff;font-family:var(--font-serif);font-size:17px;line-height:1;
    box-shadow:0 6px 16px rgba(15,95,90,.28);
  }
  .brand-text{font-family:var(--font-serif);font-size:17px;font-weight:700;letter-spacing:.02em;white-space:nowrap}
  .main-nav{display:flex;align-items:center;gap:4px;margin-left:auto}
  .nav-link{
    padding:9px 14px;border-radius:9px;font-size:15px;color:var(--ink-2);
    transition:background .2s ease,color .2s ease,transform .2s ease;
    white-space:nowrap;
  }
  .nav-link:hover{background:rgba(15,95,90,.08);color:var(--brand);transform:translateY(-1px)}
  .nav-link.is-active{background:var(--brand-soft);color:var(--brand-deep);font-weight:600}
  .header-cta{display:flex;align-items:center;gap:10px;margin-left:8px}
  .nav-toggle{
    display:none;width:42px;height:42px;border-radius:10px;border:1px solid var(--line-strong);
    background:var(--surface);align-items:center;justify-content:center;cursor:pointer;
    transition:border-color .2s ease,background .2s ease;
  }
  .nav-toggle:hover{border-color:var(--brand);background:var(--brand-soft)}
  .nav-toggle span{display:block;width:18px;height:2px;background:var(--ink);border-radius:2px;position:relative}
  .nav-toggle span::before,.nav-toggle span::after{content:"";position:absolute;left:0;width:18px;height:2px;background:var(--ink);border-radius:2px;transition:transform .22s ease}
  .nav-toggle span::before{top:-6px}
  .nav-toggle span::after{top:6px}
  .mobile-nav{display:none;background:var(--surface);border-top:1px solid var(--line)}
  .mobile-nav.is-open{display:block}
  .mobile-nav ul{padding:12px 24px 20px;display:grid;gap:4px}
  .mobile-nav a{
    display:block;padding:12px 14px;border-radius:10px;font-size:15px;color:var(--ink-2);
    transition:background .2s ease,color .2s ease;
  }
  .mobile-nav a:hover,.mobile-nav a.is-active{background:var(--brand-soft);color:var(--brand-deep)}

  /* ---------- buttons ---------- */
  .btn{
    display:inline-flex;align-items:center;justify-content:center;gap:8px;
    min-height:44px;padding:12px 24px;border-radius:8px;border:1px solid transparent;
    font-size:15px;font-weight:600;letter-spacing:.01em;cursor:pointer;
    transition:transform .2s ease,box-shadow .2s ease,background .2s ease,border-color .2s ease,color .2s ease;
  }
  .btn-sm{min-height:38px;padding:8px 16px;font-size:14px;border-radius:8px}
  .btn-primary{background:var(--brand);color:#fff;box-shadow:0 10px 24px rgba(15,95,90,.24)}
  .btn-primary:hover{background:var(--brand-deep);transform:translateY(-2px);box-shadow:0 14px 30px rgba(15,95,90,.3)}
  .btn-primary:active{transform:translateY(0)}
  .btn-ghost{background:rgba(255,255,255,.06);border-color:rgba(255,255,255,.34);color:#fff}
  .btn-ghost:hover{background:rgba(255,255,255,.14);border-color:rgba(255,255,255,.6);transform:translateY(-2px)}
  .btn-outline{background:transparent;border-color:var(--line-strong);color:var(--ink)}
  .btn-outline:hover{border-color:var(--brand);color:var(--brand);background:var(--brand-soft);transform:translateY(-2px)}
  .btn-block{width:100%}

  /* ---------- hero ---------- */
  .hero{position:relative;overflow:hidden;isolation:isolate;color:#fff}
  .hero-bg{position:absolute;inset:0;z-index:-2}
  .hero-bg img{width:100%;height:100%;object-fit:cover;object-position:center}
  .hero-veil{
    position:absolute;inset:0;z-index:-1;
    background:
      radial-gradient(120% 90% at 78% 12%,rgba(18,120,110,.42),transparent 62%),
      linear-gradient(155deg,rgba(9,20,26,.94) 0%,rgba(9,24,30,.86) 46%,rgba(9,20,26,.95) 100%);
  }
  .hero-inner{
    display:grid;grid-template-columns:minmax(0,1.18fr) minmax(0,.82fr);
    gap:56px;align-items:center;padding:78px 24px 74px;
  }
  .hero-badge{
    display:inline-flex;align-items:center;gap:9px;
    padding:7px 15px;border-radius:999px;font-size:13px;letter-spacing:.06em;
    background:rgba(255,255,255,.1);border:1px solid rgba(255,255,255,.2);color:#DDEDEA;
  }
  .hero-badge::before{content:"";width:7px;height:7px;border-radius:50%;background:#4FC3B6;box-shadow:0 0 0 4px rgba(79,195,182,.2)}
  .hero-title{
    font-family:var(--font-serif);
    font-size:clamp(28px,4vw,44px);
    line-height:1.3;letter-spacing:.01em;font-weight:700;
    margin:22px 0 20px;max-width:16em;
  }
  .hero-lead{font-size:15.5px;line-height:1.85;color:rgba(232,241,239,.84);max-width:38em}
  .hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:30px}
  .hero-tags{display:flex;flex-wrap:wrap;gap:9px;margin-top:28px}
  .hero-tags li{
    font-size:13px;padding:6px 14px;border-radius:999px;
    border:1px solid rgba(255,255,255,.2);color:rgba(232,241,239,.82);
    background:rgba(255,255,255,.05);
  }

  .hero-panel{
    background:rgba(255,255,255,.07);
    border:1px solid rgba(255,255,255,.16);
    border-radius:20px;padding:26px 24px 24px;
    -webkit-backdrop-filter:blur(16px);
    backdrop-filter:blur(16px);
    box-shadow:var(--shadow-lg);
  }
  .panel-head{
    display:flex;align-items:center;gap:9px;font-size:13px;letter-spacing:.12em;
    color:rgba(232,241,239,.72);margin-bottom:18px;
  }
  .panel-head::before{content:"";width:18px;height:2px;border-radius:2px;background:#4FC3B6}
  .ring{position:relative;width:176px;height:176px;margin:0 auto}
  .ring svg{width:100%;height:100%;transform:rotate(-90deg)}
  .ring-track{fill:none;stroke:rgba(255,255,255,.13);stroke-width:11}
  .ring-bar{
    fill:none;stroke:url(#ringGrad);stroke-width:11;stroke-linecap:round;
    stroke-dasharray:427.26;stroke-dashoffset:76.9;
    animation:ringFill 1.6s cubic-bezier(.22,.8,.32,1) both;
  }
  @keyframes ringFill{from{stroke-dashoffset:427.26}to{stroke-dashoffset:76.9}}
  .ring-mid{
    position:absolute;inset:0;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:2px;
  }
  .ring-mid strong{font-family:var(--font-serif);font-size:34px;line-height:1;letter-spacing:.01em}
  .ring-mid strong em{font-style:normal;font-size:17px;vertical-align:super;margin-left:1px;color:#9EE0D6}
  .ring-mid span{font-size:12.5px;color:rgba(232,241,239,.66);letter-spacing:.12em}
  .panel-stats{display:flex;justify-content:center;gap:18px;margin-top:14px;font-size:13px;color:rgba(232,241,239,.72)}
  .panel-stats b{color:#fff;font-weight:600}

  .tier-list{margin-top:22px;border-top:1px solid rgba(255,255,255,.14);padding-top:18px}
  .tier-head{font-size:12.5px;letter-spacing:.14em;color:rgba(232,241,239,.6);margin-bottom:12px}
  .tier{
    display:flex;align-items:center;justify-content:space-between;gap:12px;
    font-size:13.5px;padding:9px 0;color:rgba(232,241,239,.86);
    border-bottom:1px dashed rgba(255,255,255,.11);
  }
  .tier:last-child{border-bottom:0}
  .tier b{color:#9EE0D6;font-weight:600;white-space:nowrap}
  .hero-panel .btn{margin-top:18px}

  /* ---------- pill strip ---------- */
  .pill-strip{background:var(--ink);border-top:1px solid rgba(255,255,255,.08)}
  .pill-row{display:flex;align-items:center;gap:10px;padding:16px 24px;overflow-x:auto;scrollbar-width:none}
  .pill-row::-webkit-scrollbar{display:none}
  .pill-label{font-size:12.5px;letter-spacing:.16em;color:rgba(232,241,239,.5);flex-shrink:0;padding-right:4px}
  .pill{
    flex-shrink:0;font-size:14px;padding:9px 18px;border-radius:999px;
    border:1px solid rgba(255,255,255,.16);color:rgba(232,241,239,.86);
    background:rgba(255,255,255,.04);white-space:nowrap;
    transition:background .2s ease,color .2s ease,border-color .2s ease,transform .2s ease;
  }
  .pill:hover{background:rgba(79,195,182,.16);border-color:rgba(79,195,182,.55);color:#fff;transform:translateY(-2px)}
  .pill--ghost{border-style:dashed;color:rgba(232,241,239,.66)}

  /* ---------- sections ---------- */
  .section{padding:86px 0}
  .section--tight{padding:64px 0}
  .section--surface{background:var(--surface)}
  .section--paper{background:var(--paper)}
  .section--ink{background:var(--ink);color:#fff}
  .section--ink .sec-desc{color:rgba(232,241,239,.7)}
  .sec-head{max-width:780px;margin-bottom:44px}
  .sec-kicker{
    display:inline-flex;align-items:center;gap:10px;
    font-size:12.5px;letter-spacing:.18em;color:var(--brand);font-weight:600;
  }
  .sec-kicker::before{content:"";width:26px;height:2px;border-radius:2px;background:var(--brand)}
  .section--ink .sec-kicker{color:#7FD3C7}
  .section--ink .sec-kicker::before{background:#7FD3C7}
  .sec-title{
    font-family:var(--font-serif);font-weight:700;
    font-size:clamp(23px,2.8vw,33px);line-height:1.38;letter-spacing:.01em;
    margin:14px 0 12px;
  }
  .sec-desc{color:var(--muted);font-size:15px;line-height:1.85}

  /* ---------- stats ---------- */
  .stats-band{background:var(--surface);border-bottom:1px solid var(--line)}
  .stats-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:0;padding:0}
  .stat{
    padding:34px 26px;border-right:1px solid var(--line);
    transition:background .25s ease;
  }
  .stat:last-child{border-right:0}
  .stat:hover{background:rgba(15,95,90,.045)}
  .stat b{display:block;font-family:var(--font-serif);font-size:clamp(26px,3vw,36px);line-height:1.1;color:var(--brand-deep)}
  .stat span{display:block;margin-top:8px;font-size:13.5px;color:var(--muted)}

  /* ---------- generic card grids ---------- */
  .grid-4{display:grid;grid-template-columns:repeat(4,1fr);gap:22px}
  .grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
  .grid-2{display:grid;grid-template-columns:repeat(2,1fr);gap:24px}

  .card{
    background:var(--surface);
    border:1px solid var(--line);
    border-radius:var(--radius);
    box-shadow:var(--shadow-sm);
    transition:transform .22s ease,box-shadow .22s ease,border-color .22s ease;
  }
  .card:hover{transform:translateY(-4px);box-shadow:var(--shadow-md);border-color:rgba(15,95,90,.3)}
  .feature-card{padding:26px 24px 28px}
  .feature-icon{
    width:42px;height:42px;border-radius:11px;display:grid;place-items:center;
    background:var(--brand-soft);color:var(--brand);margin-bottom:18px;
  }
  .feature-icon svg{width:20px;height:20px;stroke:currentColor;fill:none;stroke-width:1.7;stroke-linecap:round;stroke-linejoin:round}
  .feature-card h3{font-size:17px;font-weight:700;letter-spacing:.01em;margin-bottom:9px}
  .feature-card p{font-size:14.5px;color:var(--muted);line-height:1.78}

  /* ---------- topic / channel cards ---------- */
  .topic-card{overflow:hidden;display:flex;flex-direction:column}
  .topic-media{position:relative;aspect-ratio:16/9;overflow:hidden;background:#0E1A23}
  .topic-media img{width:100%;height:100%;object-fit:cover;transition:transform .5s ease}
  .topic-card:hover .topic-media img{transform:scale(1.05)}
  .topic-media::after{
    content:"";position:absolute;inset:0;
    background:linear-gradient(180deg,rgba(9,20,26,0) 42%,rgba(9,20,26,.62) 100%);
  }
  .topic-body{padding:22px 22px 24px;display:flex;flex-direction:column;gap:10px;flex:1}
  .topic-body h3{font-size:17.5px;font-weight:700}
  .topic-body p{font-size:14.5px;color:var(--muted);line-height:1.78;flex:1}
  .topic-meta{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-top:4px}
  .badge{
    display:inline-flex;align-items:center;gap:6px;
    font-size:12.5px;padding:4px 11px;border-radius:999px;
    background:var(--brand-soft);color:var(--brand-deep);font-weight:600;
  }
  .badge--accent{background:var(--accent-soft);color:#9A5A1E}
  .arrow-link{font-size:14px;font-weight:600;color:var(--brand);display:inline-flex;align-items:center;gap:6px;transition:gap .2s ease,color .2s ease}
  .arrow-link:hover{gap:11px;color:var(--brand-deep)}
  .arrow-link::after{content:"→";font-size:15px}

  /* ---------- hot list ---------- */
  .hot-list{display:grid;grid-template-columns:repeat(2,1fr);gap:16px}
  .hot-item{
    display:flex;gap:16px;align-items:flex-start;
    padding:20px 22px;border-radius:var(--radius);
    background:var(--surface);border:1px solid var(--line);box-shadow:var(--shadow-sm);
    transition:transform .2s ease,box-shadow .2s ease,border-color .2s ease;
  }
  .hot-item:hover{transform:translateY(-3px);box-shadow:var(--shadow-md);border-color:rgba(15,95,90,.28)}
  .hot-index{
    flex-shrink:0;width:34px;height:34px;border-radius:10px;display:grid;place-items:center;
    font-family:var(--font-serif);font-size:15px;font-weight:700;
    background:var(--brand-soft);color:var(--brand-deep);
  }
  .hot-item h3{font-size:15.5px;font-weight:700;margin-bottom:6px;line-height:1.5}
  .hot-item p{font-size:13.8px;color:var(--muted);line-height:1.72}

  /* ---------- path timeline ---------- */
  .path-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:22px;position:relative}
  .path-step{position:relative;padding:26px 22px;background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow-sm);transition:transform .22s ease,box-shadow .22s ease,border-color .22s ease}
  .path-step:hover{transform:translateY(-4px);box-shadow:var(--shadow-md);border-color:rgba(15,95,90,.3)}
  .path-num{font-family:var(--font-serif);font-size:13px;letter-spacing:.16em;color:var(--accent);font-weight:700}
  .path-step h3{font-size:16.5px;font-weight:700;margin:10px 0 9px}
  .path-step p{font-size:14px;color:var(--muted);line-height:1.76}
  .path-line{height:2px;background:linear-gradient(90deg,var(--brand),rgba(15,95,90,.08));border-radius:2px;margin-bottom:26px}

  /* ---------- compare ---------- */
  .compare{display:grid;grid-template-columns:1fr 1fr;gap:0;border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;background:var(--surface)}
  .compare-col{padding:34px 32px}
  .compare-col + .compare-col{border-left:1px solid var(--line)}
  .compare-col.is-after{background:linear-gradient(180deg,var(--brand-soft),#fff 70%)}
  .compare-tag{font-size:12.5px;letter-spacing:.16em;font-weight:700;color:var(--muted)}
  .compare-col.is-after .compare-tag{color:var(--brand-deep)}
  .compare-col h3{font-family:var(--font-serif);font-size:20px;margin:12px 0 18px}
  .compare-list li{
    position:relative;padding-left:22px;font-size:14.5px;color:var(--ink-2);
    margin-bottom:12px;line-height:1.76;
  }
  .compare-list li::before{
    content:"";position:absolute;left:0;top:9px;width:8px;height:8px;border-radius:50%;
    background:var(--line-strong);
  }
  .compare-col.is-after .compare-list li::before{background:var(--brand)}

  /* ---------- scenario matrix ---------- */
  .scenario-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:18px}
  .scenario{
    display:flex;gap:16px;padding:24px;border-radius:var(--radius);
    background:var(--surface);border:1px solid var(--line);box-shadow:var(--shadow-sm);
    transition:transform .2s ease,box-shadow .2s ease,border-color .2s ease;
  }
  .scenario:hover{transform:translateY(-3px);box-shadow:var(--shadow-md);border-color:rgba(15,95,90,.28)}
  .scenario-icon{
    flex-shrink:0;width:40px;height:40px;border-radius:11px;display:grid;place-items:center;
    background:var(--accent-soft);color:#9A5A1E;
  }
  .scenario-icon svg{width:19px;height:19px;stroke:currentColor;fill:none;stroke-width:1.7;stroke-linecap:round;stroke-linejoin:round}
  .scenario h3{font-size:16px;font-weight:700;margin-bottom:7px}
  .scenario p{font-size:14px;color:var(--muted);line-height:1.74}

  /* ---------- myths ---------- */
  .myth{display:grid;gap:16px}
  .myth-item{
    display:grid;grid-template-columns:150px 1fr;gap:22px;align-items:start;
    padding:24px 26px;background:var(--surface);border:1px solid var(--line);
    border-radius:var(--radius);box-shadow:var(--shadow-sm);
    transition:border-color .2s ease,box-shadow .2s ease;
  }
  .myth-item:hover{border-color:rgba(194,122,52,.4);box-shadow:var(--shadow-md)}
  .myth-wrong{font-size:14px;color:#9A5A1E;font-weight:600;line-height:1.7}
  .myth-wrong span{display:block;font-size:12px;letter-spacing:.14em;color:var(--muted);font-weight:500;margin-bottom:6px}
  .myth-right{font-size:14.5px;color:var(--ink-2);line-height:1.8}
  .myth-right span{display:block;font-size:12px;letter-spacing:.14em;color:var(--brand);font-weight:600;margin-bottom:6px}

  /* ---------- voices ---------- */
  .voice-card{padding:28px 26px;background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow-sm);transition:transform .22s ease,box-shadow .22s ease,border-color .22s ease}
  .voice-card:hover{transform:translateY(-3px);box-shadow:var(--shadow-md);border-color:rgba(15,95,90,.28)}
  .voice-quote{font-size:15px;line-height:1.82;color:var(--ink-2);margin-bottom:20px}
  .voice-person{display:flex;align-items:center;gap:12px}
  .voice-avatar{
    width:38px;height:38px;border-radius:50%;display:grid;place-items:center;
    font-family:var(--font-serif);font-size:15px;font-weight:700;
    background:var(--brand-soft);color:var(--brand-deep);
  }
  .voice-person b{display:block;font-size:14px;font-weight:700}
  .voice-person em{font-style:normal;font-size:12.8px;color:var(--muted)}

  /* ---------- news (cms) ---------- */
  .news-grid{display:grid;grid-template-columns:minmax(0,1.55fr) minmax(0,.85fr);gap:32px;align-items:start}
  .news-main{display:grid;gap:14px}
  .news-item{
    display:flex;gap:18px;align-items:flex-start;justify-content:space-between;
    padding:22px 24px;background:var(--surface);border:1px solid var(--line);
    border-radius:var(--radius);box-shadow:var(--shadow-sm);
    transition:transform .2s ease,box-shadow .2s ease,border-color .2s ease;
  }
  .news-item:hover{transform:translateY(-3px);box-shadow:var(--shadow-md);border-color:rgba(15,95,90,.3)}
  .news-item h3{font-size:16px;font-weight:700;margin:8px 0 7px;line-height:1.55}
  .news-item p{font-size:14px;color:var(--muted);line-height:1.75}
  .news-date{flex-shrink:0;font-size:12.8px;color:var(--muted);white-space:nowrap;padding-top:4px}
  .news-side{
    background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);
    padding:26px 24px;box-shadow:var(--shadow-sm);
  }
  .news-side h3{font-family:var(--font-serif);font-size:17px;margin-bottom:16px}
  .news-side-item{
    display:block;padding:13px 0;border-bottom:1px dashed var(--line);
    transition:color .2s ease;
  }
  .news-side-item:last-child{border-bottom:0;padding-bottom:0}
  .news-side-item h4{font-size:14.5px;font-weight:600;line-height:1.6;margin-bottom:5px;transition:color .2s ease}
  .news-side-item span{font-size:12.5px;color:var(--muted)}
  .news-side-item:hover h4{color:var(--brand)}
  .empty-note{
    padding:44px 24px;text-align:center;color:var(--muted);font-size:15px;
    background:var(--surface);border:1px dashed var(--line-strong);border-radius:var(--radius);
  }

  /* ---------- faq ---------- */
  .faq-list{display:grid;gap:14px;max-width:900px}
  .faq-item{
    background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);
    box-shadow:var(--shadow-sm);overflow:hidden;transition:border-color .2s ease,box-shadow .2s ease;
  }
  .faq-item[open]{border-color:rgba(15,95,90,.32);box-shadow:var(--shadow-md)}
  .faq-item summary{
    list-style:none;cursor:pointer;padding:22px 26px;
    display:flex;align-items:center;justify-content:space-between;gap:18px;
    font-size:15.5px;font-weight:700;line-height:1.6;
    transition:color .2s ease,background .2s ease;
  }
  .faq-item summary::-webkit-details-marker{display:none}
  .faq-item summary:hover{color:var(--brand);background:rgba(15,95,90,.035)}
  .faq-item summary::after{
    content:"";flex-shrink:0;width:11px;height:11px;
    border-right:2px solid var(--brand);border-bottom:2px solid var(--brand);
    transform:rotate(45deg) translateY(-2px);transition:transform .25s ease;
  }
  .faq-item[open] summary::after{transform:rotate(-135deg) translateY(-2px)}
  .faq-answer{padding:0 26px 24px;font-size:14.5px;color:var(--muted);line-height:1.85;max-width:64em}

  /* ---------- join cta ---------- */
  .join-panel{
    display:grid;grid-template-columns:minmax(0,1fr) minmax(0,.85fr);gap:44px;
    background:var(--surface);border:1px solid var(--line);border-radius:18px;
    padding:44px 42px;box-shadow:var(--shadow-md);
  }
  .join-panel h2{font-family:var(--font-serif);font-size:clamp(22px,2.6vw,30px);line-height:1.4;margin:14px 0 14px}
  .join-panel p{font-size:14.8px;color:var(--muted);line-height:1.85}
  .join-points{display:grid;gap:10px;margin-top:22px}
  .join-points li{position:relative;padding-left:22px;font-size:14.2px;color:var(--ink-2)}
  .join-points li::before{
    content:"";position:absolute;left:0;top:8px;width:9px;height:9px;border-radius:3px;
    background:var(--brand);opacity:.85;
  }
  .join-form{display:grid;gap:14px}
  .field{display:grid;gap:7px}
  .field label{font-size:13px;font-weight:600;color:var(--ink-2);letter-spacing:.02em}
  .field input,.field textarea{
    width:100%;padding:12px 14px;border-radius:10px;
    border:1px solid var(--line-strong);background:#FCFBF8;
    font-size:14.5px;line-height:1.6;
    transition:border-color .2s ease,box-shadow .2s ease,background .2s ease;
  }
  .field textarea{min-height:96px;resize:vertical}
  .field input:hover,.field textarea:hover{border-color:rgba(15,95,90,.4)}
  .field input:focus,.field textarea:focus{
    outline:none;border-color:var(--brand);background:#fff;
    box-shadow:0 0 0 3px rgba(15,95,90,.12);
  }
  .form-hint{font-size:12.8px;color:var(--muted)}
  .form-ok{
    display:none;font-size:13.5px;color:var(--brand-deep);font-weight:600;
    background:var(--brand-soft);border-radius:10px;padding:11px 14px;
  }
  .form-ok.is-show{display:block}

  /* ---------- footer ---------- */
  .site-footer{background:var(--ink);color:rgba(232,241,239,.72);padding:64px 0 0}
  .footer-grid{
    display:grid;grid-template-columns:minmax(0,1.5fr) minmax(0,.8fr) minmax(0,.8fr);
    gap:48px;padding-bottom:44px;border-bottom:1px solid rgba(255,255,255,.1);
  }
  .footer-brand .brand{margin-bottom:16px}
  .footer-brand .brand-text{color:#fff}
  .footer-brand p{font-size:14px;line-height:1.85;max-width:32em;color:rgba(232,241,239,.62)}
  .footer-col h4{font-size:14px;color:#fff;margin-bottom:16px;letter-spacing:.04em}
  .footer-col a{
    display:block;font-size:14px;padding:6px 0;color:rgba(232,241,239,.66);
    transition:color .2s ease,transform .2s ease;
  }
  .footer-col a:hover{color:#7FD3C7;transform:translateX(3px)}
  .footer-bottom{
    display:flex;flex-wrap:wrap;gap:12px;justify-content:space-between;align-items:center;
    padding:22px 24px 26px;font-size:13px;color:rgba(232,241,239,.48);
  }
  .footer-bottom a{color:rgba(232,241,239,.62);transition:color .2s ease}
  .footer-bottom a:hover{color:#7FD3C7}

  /* ---------- motion ---------- */
  .fade-up{animation:fadeUp .7s cubic-bezier(.22,.8,.32,1) both}
  .fade-up.d1{animation-delay:.08s}
  .fade-up.d2{animation-delay:.16s}
  .fade-up.d3{animation-delay:.24s}
  @keyframes fadeUp{from{opacity:0;transform:translateY(16px)}to{opacity:1;transform:translateY(0)}}
  @media (prefers-reduced-motion: reduce){
    *{animation-duration:.001ms !important;animation-iteration-count:1 !important;transition-duration:.001ms !important;scroll-behavior:auto !important}
  }

  /* ---------- responsive ---------- */
  @media (max-width:1024px){
    .hero-inner{grid-template-columns:1fr;gap:38px;padding:62px 24px 58px}
    .hero-title{max-width:100%}
    .grid-4{grid-template-columns:repeat(2,1fr)}
    .stats-grid{grid-template-columns:repeat(2,1fr)}
    .stat:nth-child(2){border-right:0}
    .stat:nth-child(1),.stat:nth-child(2){border-bottom:1px solid var(--line)}
    .grid-3{grid-template-columns:repeat(2,1fr)}
    .path-grid{grid-template-columns:repeat(2,1fr)}
    .news-grid{grid-template-columns:1fr}
    .join-panel{grid-template-columns:1fr;gap:32px;padding:36px 30px}
    .main-nav{gap:0}
    .nav-link{padding:9px 11px;font-size:14.5px}
  }
  @media (max-width:900px){
    .main-nav{display:none}
    .nav-toggle{display:inline-flex}
    .header-cta{margin-left:auto}
    .header-cta .btn-sm{display:none}
    .footer-grid{grid-template-columns:1fr 1fr;gap:36px}
    .footer-brand{grid-column:1 / -1}
  }
  @media (max-width:768px){
    .section{padding:64px 0}
    .section--tight{padding:50px 0}
    .sec-head{margin-bottom:32px}
    .grid-4,.grid-3,.grid-2,.hot-list,.scenario-grid,.path-grid{grid-template-columns:1fr}
    .compare{grid-template-columns:1fr}
    .compare-col + .compare-col{border-left:0;border-top:1px solid var(--line)}
    .myth-item{grid-template-columns:1fr;gap:12px}
    .news-item{flex-direction:column;gap:8px}
    .news-date{padding-top:0}
    .hero-panel{padding:22px 20px}
  }
  @media (max-width:520px){
    .wrap{padding:0 18px}
    .hero-inner{padding:52px 18px 48px}
    .hero-actions .btn{width:100%}
    .stats-grid{grid-template-columns:1fr}
    .stat{border-right:0;border-bottom:1px solid var(--line);padding:24px 20px}
    .stat:last-child{border-bottom:0}
    .join-panel{padding:28px 20px}
    .faq-item summary{padding:18px 20px;font-size:15px}
    .faq-answer{padding:0 20px 20px}
    .footer-grid{grid-template-columns:1fr}
    .pill-row{padding:14px 18px}
    .ring{width:156px;height:156px}
  }

/* roulang page: article */
:root{
  --ink:#0E1A23;
  --ink-2:#1B2C38;
  --muted:#5E7180;
  --paper:#F6F4EF;
  --surface:#FFFFFF;
  --brand:#0F5F5A;
  --brand-deep:#0A4744;
  --brand-soft:#E8F1EF;
  --accent:#C27A34;
  --accent-soft:#F6EADF;
  --line:rgba(14,26,35,.09);
  --line-strong:rgba(14,26,35,.16);
  --radius:14px;
  --radius-sm:10px;
  --shadow-sm:0 2px 10px rgba(14,26,35,.05);
  --shadow-md:0 14px 34px rgba(14,26,35,.10);
  --shadow-lg:0 28px 70px rgba(14,26,35,.16);
  --font-sans:"Inter","PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,-apple-system,sans-serif;
  --font-serif:"Noto Serif SC","Songti SC","Source Han Serif SC","STSong",serif;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{
  margin:0;
  font-family:var(--font-sans);
  background:var(--paper);
  color:var(--ink);
  font-size:16px;
  line-height:1.78;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}
img{display:block;max-width:100%;height:auto}
a{color:inherit;text-decoration:none}
button,input,textarea,select{font:inherit;color:inherit}
h1,h2,h3,h4{margin:0}
p{margin:0}
ul,ol{margin:0;padding:0;list-style:none}
.wrap{width:100%;max-width:1180px;margin:0 auto;padding:0 24px}

/* ---------- header ---------- */
.site-header{
  position:sticky;top:0;z-index:60;
  background:rgba(246,244,239,.9);
  -webkit-backdrop-filter:saturate(180%) blur(12px);
  backdrop-filter:saturate(180%) blur(12px);
  border-bottom:1px solid transparent;
  transition:border-color .25s ease, box-shadow .25s ease, background .25s ease;
}
.site-header.is-scrolled{
  border-bottom-color:var(--line);
  box-shadow:0 6px 22px rgba(14,26,35,.07);
  background:rgba(246,244,239,.97);
}
.header-inner{display:flex;align-items:center;gap:24px;min-height:64px}
.brand{display:inline-flex;align-items:center;gap:10px;flex-shrink:0}
.brand-mark{
  width:32px;height:32px;border-radius:9px;
  display:grid;place-items:center;
  background:linear-gradient(140deg,var(--brand),#17a094);
  color:#fff;font-family:var(--font-serif);font-size:17px;line-height:1;
  box-shadow:0 6px 16px rgba(15,95,90,.28);
}
.brand-text{font-family:var(--font-serif);font-size:17px;font-weight:700;letter-spacing:.02em;white-space:nowrap}
.main-nav{display:flex;align-items:center;gap:4px;margin-left:auto}
.nav-link{
  padding:9px 14px;border-radius:9px;font-size:15px;color:var(--ink-2);
  transition:background .2s ease,color .2s ease,transform .2s ease;
  white-space:nowrap;
}
.nav-link:hover{background:rgba(15,95,90,.08);color:var(--brand);transform:translateY(-1px)}
.nav-link.is-active{background:var(--brand-soft);color:var(--brand-deep);font-weight:600}
.header-cta{display:flex;align-items:center;gap:10px;margin-left:8px}
.nav-toggle{
  display:none;width:42px;height:42px;border-radius:10px;border:1px solid var(--line-strong);
  background:var(--surface);align-items:center;justify-content:center;cursor:pointer;
  transition:border-color .2s ease,background .2s ease;
}
.nav-toggle:hover{border-color:var(--brand);background:var(--brand-soft)}
.nav-toggle span{display:block;width:18px;height:2px;background:var(--ink);border-radius:2px;position:relative}
.nav-toggle span::before,.nav-toggle span::after{content:"";position:absolute;left:0;width:18px;height:2px;background:var(--ink);border-radius:2px;transition:transform .22s ease}
.nav-toggle span::before{top:-6px}
.nav-toggle span::after{top:6px}
.mobile-nav{display:none;background:var(--surface);border-top:1px solid var(--line)}
.mobile-nav.is-open{display:block}
.mobile-nav ul{padding:12px 24px 20px;display:grid;gap:4px}
.mobile-nav a{
  display:block;padding:12px 14px;border-radius:10px;font-size:15px;color:var(--ink-2);
  transition:background .2s ease,color .2s ease;
}
.mobile-nav a:hover,.mobile-nav a.is-active{background:var(--brand-soft);color:var(--brand-deep)}

/* ---------- buttons ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  min-height:44px;padding:12px 24px;border-radius:8px;border:1px solid transparent;
  font-size:15px;font-weight:600;letter-spacing:.01em;cursor:pointer;
  transition:transform .2s ease,box-shadow .2s ease,background .2s ease,border-color .2s ease,color .2s ease;
}
.btn-sm{min-height:38px;padding:8px 16px;font-size:14px;border-radius:8px}
.btn-primary{background:var(--brand);color:#fff;box-shadow:0 10px 24px rgba(15,95,90,.24)}
.btn-primary:hover{background:var(--brand-deep);transform:translateY(-2px);box-shadow:0 14px 30px rgba(15,95,90,.3)}
.btn-primary:active{transform:translateY(0)}
.btn-outline{background:transparent;border-color:var(--line-strong);color:var(--ink)}
.btn-outline:hover{border-color:var(--brand);color:var(--brand);background:var(--brand-soft);transform:translateY(-2px)}
.btn-ghost{background:rgba(255,255,255,.08);border-color:rgba(255,255,255,.34);color:#fff}
.btn-ghost:hover{background:rgba(255,255,255,.16);border-color:rgba(255,255,255,.62);transform:translateY(-2px)}
.btn:focus-visible,.nav-link:focus-visible,.nav-toggle:focus-visible{outline:2px solid var(--brand);outline-offset:3px}

/* ---------- article hero ---------- */
.article-hero{
  position:relative;overflow:hidden;isolation:isolate;
  background:var(--ink);color:#fff;
  padding:64px 0 56px;
}
.article-hero-bg{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;z-index:-2;opacity:.42}
.article-hero::after{
  content:"";position:absolute;inset:0;z-index:-1;
  background:
    radial-gradient(120% 90% at 82% 8%,rgba(23,160,148,.34),transparent 60%),
    linear-gradient(158deg,rgba(9,20,26,.95) 0%,rgba(9,24,30,.88) 48%,rgba(9,20,26,.96) 100%);
}
.crumb{display:flex;align-items:center;gap:10px;font-size:13px;color:rgba(232,241,239,.66);letter-spacing:.04em}
.crumb a{transition:color .2s ease}
.crumb a:hover{color:#8FE3D8}
.article-hero h1{
  font-family:var(--font-serif);
  font-size:clamp(26px,3.5vw,40px);
  line-height:1.36;
  font-weight:700;
  letter-spacing:.01em;
  margin:20px 0 16px;
  max-width:24em;
}
.article-hero .hero-sub{
  font-size:15.5px;line-height:1.85;color:rgba(232,241,239,.82);max-width:44em;
}
.article-meta{display:flex;flex-wrap:wrap;align-items:center;gap:10px;margin-top:26px}
.meta-pill{
  display:inline-flex;align-items:center;gap:7px;
  padding:6px 14px;border-radius:999px;font-size:13px;
  background:rgba(255,255,255,.09);border:1px solid rgba(255,255,255,.2);color:#DCEBE8;
}
.meta-pill.is-brand{background:rgba(23,160,148,.22);border-color:rgba(79,195,182,.42);color:#C8F1EA}

/* ---------- article body layout ---------- */
.article-main{padding:64px 0 8px}
.article-layout{display:grid;grid-template-columns:minmax(0,1fr) 320px;gap:36px;align-items:start}
.article-card{
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:var(--radius);
  box-shadow:var(--shadow-sm);
  padding:40px 44px 44px;
}
.article-body{font-size:16px;line-height:1.85;color:var(--ink-2)}
.article-body h2{
  font-family:var(--font-serif);font-size:23px;line-height:1.5;color:var(--ink);
  margin:38px 0 14px;padding-left:14px;border-left:3px solid var(--brand);
}
.article-body h3{font-size:18.5px;line-height:1.6;color:var(--ink);margin:28px 0 10px}
.article-body h4{font-size:16.5px;color:var(--ink);margin:22px 0 8px}
.article-body p{margin:0 0 16px}
.article-body strong{color:var(--brand-deep)}
.article-body ul,.article-body ol{margin:0 0 18px;padding:0}
.article-body ul li{position:relative;padding-left:20px;margin-bottom:9px}
.article-body ul li::before{
  content:"";position:absolute;left:2px;top:.74em;width:7px;height:7px;border-radius:2px;
  background:var(--brand);opacity:.68;
}
.article-body ol{counter-reset:step}
.article-body ol li{position:relative;padding-left:26px;margin-bottom:10px;counter-increment:step}
.article-body ol li::before{
  content:counter(step);position:absolute;left:0;top:.28em;
  width:18px;height:18px;border-radius:6px;background:var(--brand-soft);color:var(--brand-deep);
  font-size:12px;font-weight:700;display:grid;place-items:center;
}
.article-body img{border-radius:var(--radius-sm);margin:22px 0;box-shadow:var(--shadow-sm)}
.article-body blockquote{
  margin:22px 0;padding:16px 20px;background:var(--accent-soft);
  border-left:3px solid var(--accent);border-radius:var(--radius-sm);color:var(--ink-2);
}
.article-body table{width:100%;border-collapse:collapse;margin:20px 0;font-size:15px}
.article-body th,.article-body td{border:1px solid var(--line);padding:10px 14px;text-align:left}
.article-body th{background:var(--brand-soft);color:var(--brand-deep);font-weight:600}
.article-body a{color:var(--brand);border-bottom:1px solid rgba(15,95,90,.32)}
.article-body a:hover{color:var(--brand-deep);border-bottom-color:var(--brand-deep)}
.article-body hr{border:0;border-top:1px solid var(--line);margin:28px 0}

/* ---------- aside ---------- */
.article-aside{display:grid;gap:20px;position:sticky;top:88px}
.aside-card{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);
  box-shadow:var(--shadow-sm);padding:24px 24px 26px;
}
.aside-card h3{
  font-size:15px;font-weight:700;color:var(--ink);letter-spacing:.04em;
  display:flex;align-items:center;gap:9px;margin-bottom:16px;
}
.aside-card h3::before{content:"";width:4px;height:15px;border-radius:2px;background:var(--accent)}
.aside-list li{
  font-size:14px;line-height:1.7;color:var(--muted);
  padding:9px 0;border-bottom:1px dashed var(--line);
}
.aside-list li:last-child{border-bottom:0;padding-bottom:0}
.aside-list b{display:block;font-size:14.5px;color:var(--ink-2);font-weight:600;margin-bottom:2px}
.aside-note{
  font-size:13.5px;line-height:1.75;color:var(--muted);
  background:var(--brand-soft);border-radius:var(--radius-sm);padding:14px 16px;margin-top:16px;
}

/* ---------- empty state ---------- */
.empty-state{text-align:center;padding:32px 8px 12px}
.empty-state h2{font-family:var(--font-serif);font-size:24px;color:var(--ink);margin-bottom:12px}
.empty-state p{font-size:15px;color:var(--muted);margin-bottom:24px}

/* ---------- generic section ---------- */
.sect{padding:64px 0}
.sect-alt{background:var(--surface);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.sect-head{max-width:760px;margin-bottom:32px}
.sect-kicker{
  display:inline-flex;align-items:center;gap:8px;font-size:12.5px;font-weight:700;
  letter-spacing:.14em;color:var(--accent);text-transform:uppercase;
}
.sect-kicker::before{content:"";width:22px;height:2px;border-radius:2px;background:var(--accent)}
.sect-title{
  font-family:var(--font-serif);font-size:clamp(22px,2.6vw,30px);line-height:1.45;
  color:var(--ink);margin:12px 0 12px;font-weight:700;
}
.sect-desc{font-size:15px;line-height:1.85;color:var(--muted)}

/* ---------- grid cards ---------- */
.card-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:22px}
.info-card{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);
  box-shadow:var(--shadow-sm);padding:26px 24px 28px;
  transition:transform .22s ease,box-shadow .22s ease,border-color .22s ease;
}
.info-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-md);border-color:rgba(15,95,90,.28)}
.card-icon{
  width:40px;height:40px;border-radius:10px;display:grid;place-items:center;
  background:var(--brand-soft);color:var(--brand-deep);margin-bottom:16px;
}
.card-icon svg{width:20px;height:20px}
.info-card h3{font-size:17px;font-weight:700;color:var(--ink);margin-bottom:10px;line-height:1.5}
.info-card p{font-size:14.5px;line-height:1.8;color:var(--muted)}
.tag-row{display:flex;flex-wrap:wrap;gap:8px;margin-top:16px}
.tag{
  display:inline-block;padding:4px 11px;border-radius:999px;font-size:12.5px;
  background:var(--accent-soft);color:#8C5620;line-height:1.6;
}
.tag.is-brand{background:var(--brand-soft);color:var(--brand-deep)}

/* ---------- scene cards with image ---------- */
.scene-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:22px}
.scene-card{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);
  overflow:hidden;box-shadow:var(--shadow-sm);
  transition:transform .22s ease,box-shadow .22s ease,border-color .22s ease;
}
.scene-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-md);border-color:rgba(15,95,90,.28)}
.scene-card img{width:100%;aspect-ratio:16/9;object-fit:cover}
.scene-body{padding:22px 22px 24px}
.scene-body h3{font-size:16.5px;font-weight:700;color:var(--ink);margin-bottom:8px}
.scene-body p{font-size:14.5px;line-height:1.78;color:var(--muted)}

/* ---------- roadmap / version timeline ---------- */
.roadmap{display:grid;gap:0;background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow-sm);overflow:hidden}
.roadmap-item{
  display:grid;grid-template-columns:150px minmax(0,1fr);gap:22px;
  padding:22px 28px;border-bottom:1px solid var(--line);
  transition:background .22s ease;
}
.roadmap-item:last-child{border-bottom:0}
.roadmap-item:hover{background:rgba(15,95,90,.04)}
.roadmap-ver{
  display:inline-flex;align-items:center;justify-content:flex-start;gap:10px;
  font-family:var(--font-serif);font-size:16px;font-weight:700;color:var(--brand-deep);
}
.roadmap-ver span{
  display:inline-block;width:9px;height:9px;border-radius:50%;
  background:var(--accent);box-shadow:0 0 0 4px var(--accent-soft);
}
.roadmap-body h3{font-size:16px;font-weight:700;color:var(--ink);margin-bottom:6px}
.roadmap-body p{font-size:14.5px;line-height:1.78;color:var(--muted)}

/* ---------- channel matrix ---------- */
.channel-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:22px}
.channel-card{
  display:flex;flex-direction:column;justify-content:space-between;gap:18px;
  background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);
  padding:26px 24px;box-shadow:var(--shadow-sm);
  transition:transform .22s ease,box-shadow .22s ease,border-color .22s ease,background .22s ease;
}
.channel-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-md);border-color:rgba(15,95,90,.3);background:#FCFDFC}
.channel-card h3{font-size:17px;font-weight:700;color:var(--ink);margin-bottom:8px}
.channel-card p{font-size:14.5px;line-height:1.78;color:var(--muted)}
.channel-link{
  display:inline-flex;align-items:center;gap:7px;font-size:14px;font-weight:600;color:var(--brand);
}
.channel-link svg{width:15px;height:15px;transition:transform .2s ease}
.channel-card:hover .channel-link svg{transform:translateX(4px)}

/* ---------- faq ---------- */
.faq-list{display:grid;gap:14px;max-width:900px}
.faq-item{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--radius-sm);
  box-shadow:var(--shadow-sm);padding:0 22px;
  transition:border-color .2s ease,box-shadow .2s ease;
}
.faq-item[open]{border-color:rgba(15,95,90,.28);box-shadow:var(--shadow-md)}
.faq-item summary{
  list-style:none;cursor:pointer;padding:18px 0;font-size:16px;font-weight:600;color:var(--ink);
  display:flex;align-items:center;justify-content:space-between;gap:16px;
}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary::after{
  content:"";width:9px;height:9px;flex-shrink:0;
  border-right:2px solid var(--brand);border-bottom:2px solid var(--brand);
  transform:rotate(45deg);transition:transform .22s ease;margin-right:4px;
}
.faq-item[open] summary::after{transform:rotate(-135deg)}
.faq-answer{font-size:14.8px;line-height:1.85;color:var(--muted);padding:0 0 20px}

/* ---------- CTA ---------- */
.cta-band{
  position:relative;overflow:hidden;isolation:isolate;
  border-radius:var(--radius);padding:48px 44px;color:#fff;
  background:linear-gradient(140deg,var(--brand-deep),#12857c 92%);
  box-shadow:var(--shadow-lg);
}
.cta-band::after{
  content:"";position:absolute;right:-70px;top:-70px;width:280px;height:280px;border-radius:50%;
  background:radial-gradient(circle,rgba(255,255,255,.22),transparent 68%);z-index:-1;
}
.cta-band h2{font-family:var(--font-serif);font-size:clamp(22px,2.6vw,30px);line-height:1.45;margin-bottom:12px}
.cta-band p{font-size:15px;line-height:1.85;color:rgba(255,255,255,.84);max-width:44em}
.cta-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:26px}

/* ---------- footer ---------- */
.site-footer{background:#0B171E;color:rgba(232,241,239,.76);padding:56px 0 0;margin-top:0}
.footer-grid{
  display:grid;grid-template-columns:minmax(0,1.5fr) minmax(0,1fr) minmax(0,1fr);
  gap:40px;padding-bottom:40px;border-bottom:1px solid rgba(255,255,255,.1);
}
.footer-brand .brand{margin-bottom:16px}
.footer-brand .brand-text{color:#fff}
.footer-brand p{font-size:14px;line-height:1.85;color:rgba(232,241,239,.62);max-width:34em}
.footer-col h4{font-size:14px;font-weight:700;color:#fff;letter-spacing:.08em;margin-bottom:16px}
.footer-col a{
  display:block;font-size:14px;padding:6px 0;color:rgba(232,241,239,.68);
  transition:color .2s ease,transform .2s ease;
}
.footer-col a:hover{color:#8FE3D8;transform:translateX(3px)}
.footer-bottom{
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:12px;
  padding:20px 24px 26px;font-size:13px;color:rgba(232,241,239,.52);
}
.footer-bottom a{color:rgba(232,241,239,.72);transition:color .2s ease}
.footer-bottom a:hover{color:#8FE3D8}

/* ---------- responsive ---------- */
@media (max-width:1024px){
  .article-layout{grid-template-columns:minmax(0,1fr)}
  .article-aside{position:static;grid-template-columns:repeat(2,minmax(0,1fr));display:grid}
  .card-grid,.scene-grid,.channel-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
  .footer-grid{grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:32px}
  .footer-brand{grid-column:1 / -1}
}
@media (max-width:820px){
  .main-nav{display:none}
  .header-cta{display:none}
  .nav-toggle{display:flex;margin-left:auto}
  .article-card{padding:30px 24px 34px}
  .article-main{padding:44px 0 4px}
  .roadmap-item{grid-template-columns:minmax(0,1fr);gap:10px;padding:20px 22px}
  .cta-band{padding:36px 26px}
}
@media (max-width:768px){
  .card-grid,.scene-grid,.channel-grid{grid-template-columns:minmax(0,1fr)}
  .article-aside{grid-template-columns:minmax(0,1fr)}
  .sect{padding:48px 0}
  .article-hero{padding:46px 0 40px}
  .footer-bottom{flex-direction:column;align-items:flex-start}
}
@media (max-width:520px){
  .wrap{padding:0 18px}
  .header-inner{gap:12px}
  .brand-text{font-size:15.5px}
  .article-card{padding:24px 18px 28px}
  .article-body{font-size:15.5px}
  .article-body h2{font-size:20px}
  .article-hero h1{font-size:24px}
  .btn{width:100%}
  .cta-actions{flex-direction:column}
  .footer-grid{grid-template-columns:minmax(0,1fr)}
}

/* roulang page: category1 */
:root{
 --ink:#0E1A23;
 --ink-2:#1B2C38;
 --muted:#5E7180;
 --paper:#F6F4EF;
 --surface:#FFFFFF;
 --brand:#0F5F5A;
 --brand-deep:#0A4744;
 --brand-soft:#E8F1EF;
 --accent:#C27A34;
 --accent-soft:#F6EADF;
 --line:rgba(14,26,35,.09);
 --line-strong:rgba(14,26,35,.16);
 --radius:14px;
 --radius-sm:10px;
 --shadow-sm:0 2px 10px rgba(14,26,35,.05);
 --shadow-md:0 14px 34px rgba(14,26,35,.10);
 --shadow-lg:0 28px 70px rgba(14,26,35,.16);
 --font-sans:"Inter","PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,-apple-system,sans-serif;
 --font-serif:"Noto Serif SC","Songti SC","Source Han Serif SC","STSong",serif;
}
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{
 margin:0;
 font-family:var(--font-sans);
 background:var(--paper);
 color:var(--ink);
 font-size:16px;
 line-height:1.78;
 -webkit-font-smoothing:antialiased;
 text-rendering:optimizeLegibility;
}
img{display:block;max-width:100%;height:auto}
a{color:inherit;text-decoration:none}
button,input,textarea,select{font:inherit;color:inherit}
h1,h2,h3,h4,p,ul,ol{margin:0}
ul,ol{padding:0;list-style:none}
.wrap{width:100%;max-width:1200px;margin:0 auto;padding:0 24px}
:focus-visible{outline:2px solid var(--brand);outline-offset:3px;border-radius:6px}

/* ---------- header ---------- */
.site-header{
 position:sticky;top:0;z-index:60;
 background:rgba(246,244,239,.9);
 -webkit-backdrop-filter:saturate(180%) blur(12px);
 backdrop-filter:saturate(180%) blur(12px);
 border-bottom:1px solid transparent;
 transition:border-color .25s ease, box-shadow .25s ease, background .25s ease;
}
.site-header.is-scrolled{
 border-bottom-color:var(--line);
 box-shadow:0 6px 22px rgba(14,26,35,.07);
 background:rgba(246,244,239,.97);
}
.header-inner{display:flex;align-items:center;gap:24px;min-height:64px}
.brand{display:inline-flex;align-items:center;gap:10px;flex-shrink:0}
.brand-mark{
 width:32px;height:32px;border-radius:9px;display:grid;place-items:center;
 background:linear-gradient(140deg,var(--brand),#17a094);
 color:#fff;font-family:var(--font-serif);font-size:17px;line-height:1;
 box-shadow:0 6px 16px rgba(15,95,90,.28);
}
.brand-text{font-family:var(--font-serif);font-size:17px;font-weight:700;letter-spacing:.02em;white-space:nowrap}
.main-nav{display:flex;align-items:center;gap:4px;margin-left:auto}
.nav-link{
 padding:9px 14px;border-radius:9px;font-size:15px;color:var(--ink-2);white-space:nowrap;
 transition:background .2s ease,color .2s ease,transform .2s ease;
}
.nav-link:hover{background:rgba(15,95,90,.08);color:var(--brand);transform:translateY(-1px)}
.nav-link.is-active{background:var(--brand-soft);color:var(--brand-deep);font-weight:600}
.header-cta{display:flex;align-items:center;gap:10px;margin-left:8px}
.nav-toggle{
 display:none;width:42px;height:42px;border-radius:10px;border:1px solid var(--line-strong);
 background:var(--surface);align-items:center;justify-content:center;cursor:pointer;
 transition:border-color .2s ease,background .2s ease;margin-left:auto;
}
.nav-toggle:hover{border-color:var(--brand);background:var(--brand-soft)}
.nav-toggle span{display:block;width:18px;height:2px;background:var(--ink);border-radius:2px;position:relative}
.nav-toggle span::before,.nav-toggle span::after{content:"";position:absolute;left:0;width:18px;height:2px;background:var(--ink);border-radius:2px;transition:transform .22s ease}
.nav-toggle span::before{top:-6px}
.nav-toggle span::after{top:6px}
.mobile-nav{display:none;background:var(--surface);border-top:1px solid var(--line)}
.mobile-nav.is-open{display:block}
.mobile-nav ul{padding:12px 24px 20px;display:grid;gap:4px}
.mobile-nav a{display:block;padding:12px 14px;border-radius:10px;font-size:15px;color:var(--ink-2);transition:background .2s ease,color .2s ease}
.mobile-nav a:hover,.mobile-nav a.is-active{background:var(--brand-soft);color:var(--brand-deep)}

/* ---------- buttons ---------- */
.btn{
 display:inline-flex;align-items:center;justify-content:center;gap:8px;
 min-height:44px;padding:12px 24px;border-radius:8px;border:1px solid transparent;
 font-size:15px;font-weight:600;letter-spacing:.01em;cursor:pointer;
 transition:transform .2s ease,box-shadow .2s ease,background .2s ease,border-color .2s ease,color .2s ease;
}
.btn-sm{min-height:38px;padding:8px 16px;font-size:14px;border-radius:8px}
.btn-primary{background:var(--brand);color:#fff;box-shadow:0 10px 24px rgba(15,95,90,.24)}
.btn-primary:hover{background:var(--brand-deep);transform:translateY(-2px);box-shadow:0 14px 30px rgba(15,95,90,.3)}
.btn-primary:active{transform:translateY(0)}
.btn-ghost{background:rgba(255,255,255,.06);border-color:rgba(255,255,255,.34);color:#fff}
.btn-ghost:hover{background:rgba(255,255,255,.14);border-color:rgba(255,255,255,.6);transform:translateY(-2px)}
.btn-outline{background:transparent;border-color:var(--line-strong);color:var(--ink)}
.btn-outline:hover{border-color:var(--brand);color:var(--brand);background:var(--brand-soft);transform:translateY(-2px)}
.btn-block{width:100%}

/* ---------- hero ---------- */
.hero{position:relative;overflow:hidden;isolation:isolate;color:#fff}
.hero-bg{position:absolute;inset:0;z-index:-2}
.hero-bg img{width:100%;height:100%;object-fit:cover;object-position:center}
.hero-veil{
 position:absolute;inset:0;z-index:-1;
 background:
 radial-gradient(120% 90% at 80% 10%,rgba(18,120,110,.42),transparent 62%),
 linear-gradient(155deg,rgba(9,20,26,.94) 0%,rgba(9,24,30,.87) 48%,rgba(9,20,26,.96) 100%);
}
.hero-inner{display:grid;grid-template-columns:minmax(0,1.12fr) minmax(0,.88fr);gap:48px;align-items:center;padding:72px 0 68px}
.hero-badge{
 display:inline-flex;align-items:center;gap:9px;
 padding:7px 15px;border-radius:999px;font-size:13px;letter-spacing:.05em;
 background:rgba(255,255,255,.1);border:1px solid rgba(255,255,255,.2);color:#DDEDEA;
}
.hero-badge::before{content:"";width:7px;height:7px;border-radius:50%;background:#4FC3B6;box-shadow:0 0 0 4px rgba(79,195,182,.2)}
.hero-title{
 font-family:var(--font-serif);font-size:clamp(29px,3.8vw,44px);line-height:1.32;
 font-weight:700;letter-spacing:.01em;margin:22px 0 20px;max-width:19em;
}
.hero-lead{font-size:15.5px;line-height:1.85;color:rgba(232,241,239,.84);max-width:39em}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:30px}
.hero-tags{display:flex;flex-wrap:wrap;gap:10px;margin-top:26px}
.tag{
 display:inline-flex;align-items:center;padding:6px 13px;border-radius:999px;
 font-size:12.8px;letter-spacing:.03em;color:#CFE3E0;
 background:rgba(255,255,255,.08);border:1px solid rgba(255,255,255,.18);
 transition:background .2s ease,border-color .2s ease,transform .2s ease;
}
.tag:hover{background:rgba(255,255,255,.15);border-color:rgba(79,195,182,.7);transform:translateY(-1px)}

/* ---------- board ---------- */
.board{
 background:rgba(255,255,255,.07);border:1px solid rgba(255,255,255,.17);
 border-radius:18px;padding:22px 22px 18px;
 -webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px);
 box-shadow:0 24px 60px rgba(0,0,0,.28);
}
.board-head{display:flex;align-items:baseline;justify-content:space-between;gap:12px;margin-bottom:14px}
.board-title{font-family:var(--font-serif);font-size:16.5px;font-weight:700;color:#fff;letter-spacing:.02em}
.board-sub{font-size:12px;color:rgba(216,226,227,.62);white-space:nowrap}
.board-row{display:grid;grid-template-columns:26px minmax(0,1fr) auto;gap:12px;align-items:center;padding:11px 0;border-bottom:1px dashed rgba(255,255,255,.13)}
.board-row:last-of-type{border-bottom:none}
.rank{font-family:var(--font-serif);font-size:14px;color:rgba(216,226,227,.6)}
.board-name{font-size:14.2px;color:#EDF5F3;font-weight:600}
.bar{height:6px;border-radius:99px;background:rgba(255,255,255,.15);overflow:hidden;margin-top:7px}
.bar span{display:block;height:100%;border-radius:99px;background:linear-gradient(90deg,#4FC3B6,#8FD9CD 60%,#C27A34)}
.board-val{font-family:var(--font-serif);font-size:15px;font-weight:700;color:#8FD9CD}
.board-note{margin-top:14px;font-size:12.2px;line-height:1.7;color:rgba(216,226,227,.6)}

/* ---------- pill bar ---------- */
.pillbar{background:var(--surface);border-bottom:1px solid var(--line)}
.pillbar-inner{display:flex;gap:10px;overflow-x:auto;padding:14px 0;scrollbar-width:thin}
.pillbar-inner::-webkit-scrollbar{height:5px}
.pillbar-inner::-webkit-scrollbar-thumb{background:rgba(15,95,90,.25);border-radius:99px}
.pill{
 flex:0 0 auto;display:inline-flex;align-items:center;min-height:40px;
 padding:9px 18px;border-radius:999px;border:1px solid var(--line-strong);
 font-size:14px;color:var(--ink-2);background:var(--surface);
 transition:background .2s ease,border-color .2s ease,color .2s ease,transform .2s ease,box-shadow .2s ease;
}
.pill:hover{border-color:var(--brand);color:var(--brand);background:var(--brand-soft);transform:translateY(-1px)}
.pill.is-active{background:var(--brand);border-color:var(--brand);color:#fff;box-shadow:0 8px 20px rgba(15,95,90,.24);font-weight:600}

/* ---------- sections ---------- */
.sec{padding:66px 0}
.sec-alt{background:var(--surface);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.sec-head{max-width:780px;margin-bottom:38px}
.eyebrow{display:inline-flex;align-items:center;gap:9px;font-size:12.8px;letter-spacing:.16em;font-weight:700;color:var(--brand);text-transform:uppercase}
.eyebrow::before{content:"";width:26px;height:2px;border-radius:2px;background:var(--accent)}
.sec-title{font-family:var(--font-serif);font-size:clamp(23px,2.6vw,31px);line-height:1.4;font-weight:700;margin:12px 0 12px}
.sec-desc{color:var(--muted);font-size:15.4px;line-height:1.85;max-width:60em}

/* ---------- grids & cards ---------- */
.grid{display:grid;gap:20px}
.grid-2{grid-template-columns:repeat(2,minmax(0,1fr))}
.grid-3{grid-template-columns:repeat(3,minmax(0,1fr))}
.grid-4{grid-template-columns:repeat(4,minmax(0,1fr))}
.card{
 display:flex;flex-direction:column;gap:11px;
 background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);
 padding:22px;box-shadow:var(--shadow-sm);
 transition:transform .2s ease,box-shadow .2s ease,border-color .2s ease;
}
.card:hover{transform:translateY(-4px);box-shadow:var(--shadow-md);border-color:rgba(15,95,90,.34)}
.card-media{border-radius:var(--radius-sm);overflow:hidden;aspect-ratio:16/9;background:var(--brand-soft)}
.card-media img{width:100%;height:100%;object-fit:cover;transition:transform .45s ease}
.card:hover .card-media img{transform:scale(1.045)}
.card-title{font-size:17px;font-weight:700;line-height:1.5;letter-spacing:.01em}
.card-text{font-size:14.4px;color:var(--muted);line-height:1.78}
.card-tag{
 display:inline-flex;align-self:flex-start;padding:4px 11px;border-radius:999px;
 background:var(--brand-soft);color:var(--brand-deep);font-size:12.4px;font-weight:600;letter-spacing:.02em;
}
.card-tag.accent{background:var(--accent-soft);color:#8B5420}
.card-no{font-family:var(--font-serif);font-size:13px;color:var(--accent);font-weight:700;letter-spacing:.14em}

/* ---------- steps ---------- */
.steps{display:grid;gap:16px}
.step{
 display:grid;grid-template-columns:52px minmax(0,1fr);gap:18px;align-items:start;
 background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);
 padding:22px;box-shadow:var(--shadow-sm);
 transition:transform .2s ease,box-shadow .2s ease,border-color .2s ease;
}
.step:hover{transform:translateY(-3px);box-shadow:var(--shadow-md);border-color:rgba(15,95,90,.3)}
.step-no{
 width:52px;height:52px;border-radius:13px;display:grid;place-items:center;
 background:linear-gradient(140deg,var(--brand-soft),#DCEBE7);color:var(--brand-deep);
 font-family:var(--font-serif);font-size:19px;font-weight:700;
}
.step-title{font-size:16.5px;font-weight:700;margin-bottom:6px}
.step-text{font-size:14.4px;color:var(--muted);line-height:1.8}

/* ---------- metrics ---------- */
.metric-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:16px}
.metric{
 background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);
 padding:20px 18px;box-shadow:var(--shadow-sm);border-left:3px solid var(--brand);
 transition:transform .2s ease,box-shadow .2s ease;
}
.metric:hover{transform:translateY(-3px);box-shadow:var(--shadow-md)}
.metric-num{font-family:var(--font-serif);font-size:27px;font-weight:700;color:var(--brand-deep);line-height:1.2}
.metric-label{font-size:13.4px;color:var(--muted);margin-top:6px}

/* ---------- quotes ---------- */
.quote{
 border-left:3px solid var(--accent);background:var(--accent-soft);
 border-radius:0 var(--radius) var(--radius) 0;padding:18px 22px;font-size:14.6px;color:#5A3E1E;line-height:1.8;
}
.quote cite{display:block;margin-top:8px;font-style:normal;font-size:13px;color:#8B5420;font-weight:600}
.quote-list{display:grid;gap:14px}

/* ---------- faq ---------- */
.faq{display:grid;gap:12px}
.faq-item{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;box-shadow:var(--shadow-sm);transition:border-color .2s ease,box-shadow .2s ease}
.faq-item:hover{border-color:rgba(15,95,90,.3);box-shadow:var(--shadow-md)}
.faq-item summary{
 cursor:pointer;list-style:none;padding:18px 22px;font-size:15.6px;font-weight:600;
 display:flex;align-items:center;justify-content:space-between;gap:16px;
}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary::after{content:"+";font-family:var(--font-serif);font-size:21px;color:var(--brand);line-height:1;flex-shrink:0}
.faq-item[open] summary::after{content:"−"}
.faq-item p{padding:0 22px 20px;font-size:14.5px;color:var(--muted);line-height:1.85}

/* ---------- posts ---------- */
.post-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:20px}
.post-card{
 display:flex;flex-direction:column;gap:10px;padding:22px;
 background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);
 box-shadow:var(--shadow-sm);
 transition:transform .2s ease,box-shadow .2s ease,border-color .2s ease;
}
.post-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-md);border-color:rgba(15,95,90,.34)}
.post-title{font-size:16px;font-weight:700;line-height:1.55}
.post-text{font-size:14.2px;color:var(--muted);line-height:1.78;display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden}
.post-meta{font-size:12.8px;color:var(--muted);letter-spacing:.02em;margin-top:auto;padding-top:6px;border-top:1px dashed var(--line)}
.empty-note{padding:26px;border:1px dashed var(--line-strong);border-radius:var(--radius);color:var(--muted);font-size:14.6px;background:var(--surface)}

/* ---------- cta band ---------- */
.cta-band{
 background:linear-gradient(140deg,#0A4744 0%,#0F5F5A 52%,#12655F 100%);
 color:#fff;border-radius:20px;padding:46px;
 display:grid;grid-template-columns:1.15fr .85fr;gap:34px;align-items:center;
 box-shadow:var(--shadow-lg);position:relative;overflow:hidden;
}
.cta-band::after{
 content:"";position:absolute;right:-90px;top:-90px;width:280px;height:280px;border-radius:50%;
 background:radial-gradient(circle,rgba(79,195,182,.34),transparent 68%);
}
.cta-title{font-family:var(--font-serif);font-size:clamp(22px,2.5vw,29px);line-height:1.42;font-weight:700;margin-bottom:14px}
.cta-text{font-size:15px;line-height:1.85;color:rgba(232,241,239,.85);max-width:34em}
.cta-actions{display:flex;flex-direction:column;gap:12px;position:relative;z-index:1}
.cta-hint{font-size:13px;color:rgba(232,241,239,.7);line-height:1.7}

/* ---------- footer ---------- */
.site-footer{background:var(--ink);color:#D8E2E3;padding:56px 0 0;margin-top:0;border-top:1px solid rgba(255,255,255,.08)}
.footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr;gap:40px;padding-bottom:36px}
.footer-brand .brand-text{color:#fff}
.footer-brand p{color:rgba(216,226,227,.7);font-size:14.4px;line-height:1.85;margin-top:16px;max-width:44em}
.footer-col h4{font-size:15px;font-family:var(--font-serif);color:#fff;margin-bottom:14px;letter-spacing:.03em}
.footer-col a{display:block;padding:6px 0;font-size:14.4px;color:rgba(216,226,227,.72);transition:color .2s ease,transform .2s ease}
.footer-col a:hover{color:#4FC3B6;transform:translateX(3px)}
.footer-bottom{
 border-top:1px solid rgba(255,255,255,.1);padding:18px 24px 22px;
 display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;
 font-size:13.4px;color:rgba(216,226,227,.58);
}
.footer-bottom a{color:rgba(216,226,227,.72);transition:color .2s ease}
.footer-bottom a:hover{color:#4FC3B6}

/* ---------- responsive ---------- */
@media (max-width:1024px){
 .hero-inner{grid-template-columns:minmax(0,1fr);gap:36px;padding:56px 0}
 .grid-4{grid-template-columns:repeat(2,minmax(0,1fr))}
 .grid-3{grid-template-columns:repeat(2,minmax(0,1fr))}
 .post-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
 .main-nav{display:none}
 .header-cta{display:none}
 .nav-toggle{display:flex}
 .cta-band{grid-template-columns:1fr;padding:36px}
 .footer-grid{grid-template-columns:1fr 1fr}
 .metric-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
}
@media (max-width:768px){
 .sec{padding:48px 0}
 .wrap{padding:0 18px}
 .grid-2,.grid-3,.grid-4{grid-template-columns:minmax(0,1fr)}
 .post-grid{grid-template-columns:minmax(0,1fr)}
 .hero-title{font-size:27px}
 .hero-lead{font-size:15px}
 .footer-grid{grid-template-columns:1fr;gap:28px}
 .footer-bottom{flex-direction:column;gap:8px;padding-left:18px;padding-right:18px}
}
@media (max-width:520px){
 .header-inner{gap:12px}
 .brand-text{font-size:15px}
 .pill{padding:8px 14px;font-size:13px;min-height:38px}
 .card,.post-card,.step{padding:18px}
 .step{grid-template-columns:minmax(0,1fr);gap:12px}
 .metric-grid{grid-template-columns:minmax(0,1fr)}
 .cta-band{padding:26px;border-radius:16px}
 .hero-actions .btn{width:100%}
 .board{padding:18px 16px 14px}
}

/* roulang page: category2 */
:root{
  --ink:#0E1A23;
  --ink-2:#1B2C38;
  --muted:#5E7180;
  --paper:#F6F4EF;
  --surface:#FFFFFF;
  --brand:#0F5F5A;
  --brand-deep:#0A4744;
  --brand-soft:#E8F1EF;
  --accent:#C27A34;
  --accent-soft:#F6EADF;
  --line:rgba(14,26,35,.09);
  --line-strong:rgba(14,26,35,.16);
  --radius:14px;
  --radius-sm:10px;
  --shadow-sm:0 2px 10px rgba(14,26,35,.05);
  --shadow-md:0 14px 34px rgba(14,26,35,.10);
  --shadow-lg:0 28px 70px rgba(14,26,35,.16);
  --font-sans:"Inter","PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,-apple-system,sans-serif;
  --font-serif:"Noto Serif SC","Songti SC","Source Han Serif SC","STSong",serif;
}
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body.page{
  margin:0;
  font-family:var(--font-sans);
  background:var(--paper);
  color:var(--ink);
  font-size:16px;
  line-height:1.78;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}
img{display:block;max-width:100%;height:auto}
a{color:inherit;text-decoration:none}
button,input,textarea,select{font:inherit;color:inherit}
ul,ol{margin:0;padding:0;list-style:none}
h1,h2,h3,h4,p{margin:0}
.wrap{width:100%;max-width:1180px;margin:0 auto;padding:0 24px}
/* ---------- header ---------- */
.site-header{
  position:sticky;top:0;z-index:60;
  background:rgba(246,244,239,.9);
  -webkit-backdrop-filter:saturate(180%) blur(12px);
  backdrop-filter:saturate(180%) blur(12px);
  border-bottom:1px solid transparent;
  transition:border-color .25s ease, box-shadow .25s ease, background .25s ease;
}
.site-header.is-scrolled{
  border-bottom-color:var(--line);
  box-shadow:0 6px 22px rgba(14,26,35,.07);
  background:rgba(246,244,239,.97);
}
.header-inner{display:flex;align-items:center;gap:24px;min-height:64px}
.brand{display:inline-flex;align-items:center;gap:10px;flex-shrink:0}
.brand-mark{
  width:32px;height:32px;border-radius:9px;display:grid;place-items:center;
  background:linear-gradient(140deg,var(--brand),#17a094);
  color:#fff;font-family:var(--font-serif);font-size:17px;line-height:1;
  box-shadow:0 6px 16px rgba(15,95,90,.28);
}
.brand-text{font-family:var(--font-serif);font-size:17px;font-weight:700;letter-spacing:.02em;white-space:nowrap}
.main-nav{display:flex;align-items:center;gap:4px;margin-left:auto}
.nav-link{
  padding:9px 14px;border-radius:9px;font-size:15px;color:var(--ink-2);
  transition:background .2s ease,color .2s ease,transform .2s ease;white-space:nowrap;
}
.nav-link:hover{background:rgba(15,95,90,.08);color:var(--brand);transform:translateY(-1px)}
.nav-link:focus-visible{outline:2px solid var(--brand);outline-offset:2px}
.nav-link.is-active{background:var(--brand-soft);color:var(--brand-deep);font-weight:600}
.header-cta{display:flex;align-items:center;gap:10px;margin-left:8px}
.nav-toggle{
  display:none;width:42px;height:42px;border-radius:10px;border:1px solid var(--line-strong);
  background:var(--surface);align-items:center;justify-content:center;cursor:pointer;
  transition:border-color .2s ease,background .2s ease;margin-left:auto;
}
.nav-toggle:hover{border-color:var(--brand);background:var(--brand-soft)}
.nav-toggle span{display:block;width:18px;height:2px;background:var(--ink);border-radius:2px;position:relative}
.nav-toggle span::before,.nav-toggle span::after{content:"";position:absolute;left:0;width:18px;height:2px;background:var(--ink);border-radius:2px;transition:transform .22s ease}
.nav-toggle span::before{top:-6px}
.nav-toggle span::after{top:6px}
.mobile-nav{display:none;background:var(--surface);border-top:1px solid var(--line)}
.mobile-nav.is-open{display:block}
.mobile-nav ul{padding:12px 24px 20px;display:grid;gap:4px}
.mobile-nav a{display:block;padding:12px 14px;border-radius:10px;font-size:15px;color:var(--ink-2);transition:background .2s ease,color .2s ease}
.mobile-nav a:hover,.mobile-nav a.is-active{background:var(--brand-soft);color:var(--brand-deep)}
/* ---------- buttons ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  min-height:44px;padding:12px 24px;border-radius:8px;border:1px solid transparent;
  font-size:15px;font-weight:600;letter-spacing:.01em;cursor:pointer;
  transition:transform .2s ease,box-shadow .2s ease,background .2s ease,border-color .2s ease,color .2s ease;
}
.btn:focus-visible{outline:2px solid var(--accent);outline-offset:3px}
.btn-sm{min-height:38px;padding:8px 16px;font-size:14px;border-radius:8px}
.btn-primary{background:var(--brand);color:#fff;box-shadow:0 10px 24px rgba(15,95,90,.24)}
.btn-primary:hover{background:var(--brand-deep);transform:translateY(-2px);box-shadow:0 14px 30px rgba(15,95,90,.3)}
.btn-primary:active{transform:translateY(0)}
.btn-outline{background:transparent;border-color:var(--line-strong);color:var(--ink)}
.btn-outline:hover{border-color:var(--brand);color:var(--brand);background:var(--brand-soft);transform:translateY(-2px)}
.btn-ghost{background:rgba(255,255,255,.08);border-color:rgba(255,255,255,.34);color:#fff}
.btn-ghost:hover{background:rgba(255,255,255,.16);border-color:rgba(255,255,255,.62);transform:translateY(-2px)}
.btn-accent{background:var(--accent);color:#fff;box-shadow:0 10px 24px rgba(194,122,52,.26)}
.btn-accent:hover{background:#a8662a;transform:translateY(-2px)}
/* ---------- hero (category) ---------- */
.hero-sub{position:relative;overflow:hidden;isolation:isolate;color:#fff}
.hero-bg{position:absolute;inset:0;z-index:-2}
.hero-bg img{width:100%;height:100%;object-fit:cover;object-position:center}
.hero-veil{
  position:absolute;inset:0;z-index:-1;
  background:
    radial-gradient(120% 90% at 80% 10%,rgba(18,120,110,.40),transparent 62%),
    linear-gradient(155deg,rgba(9,20,26,.95) 0%,rgba(9,24,30,.87) 46%,rgba(9,20,26,.96) 100%);
}
.hero-inner{
  display:grid;grid-template-columns:minmax(0,1.15fr) minmax(0,.85fr);
  gap:48px;align-items:center;padding:60px 0 56px;
}
.crumb{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13px;color:rgba(232,241,239,.7)}
.crumb a{color:rgba(232,241,239,.86);border-bottom:1px solid rgba(232,241,239,.3);padding-bottom:1px;transition:color .2s ease,border-color .2s ease}
.crumb a:hover{color:#fff;border-color:#fff}
.crumb span.sep{opacity:.5}
.hero-title{
  font-family:var(--font-serif);
  font-size:clamp(28px,4vw,42px);
  line-height:1.28;letter-spacing:.01em;font-weight:700;
  margin:18px 0 18px;max-width:14em;
}
.hero-lead{font-size:15.5px;line-height:1.86;color:rgba(232,241,239,.85);max-width:36em}
.hero-tags{display:flex;flex-wrap:wrap;gap:10px;margin-top:24px}
.tag-pill{
  display:inline-flex;align-items:center;gap:8px;
  padding:7px 14px;border-radius:999px;font-size:13px;
  background:rgba(255,255,255,.1);border:1px solid rgba(255,255,255,.22);color:#DDEDEA;
  transition:background .2s ease,border-color .2s ease,transform .2s ease;
}
.tag-pill:hover{background:rgba(255,255,255,.18);border-color:rgba(255,255,255,.45);transform:translateY(-2px)}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:28px}
.hero-panel{
  border-radius:var(--radius);overflow:hidden;
  border:1px solid rgba(255,255,255,.16);
  background:rgba(255,255,255,.07);
  box-shadow:0 26px 60px rgba(4,12,16,.42);
  -webkit-backdrop-filter:blur(6px);backdrop-filter:blur(6px);
}
.hero-panel-media{position:relative;aspect-ratio:16/10;overflow:hidden}
.hero-panel-media img{width:100%;height:100%;object-fit:cover;transition:transform .5s ease}
.hero-panel:hover .hero-panel-media img{transform:scale(1.04)}
.hero-panel-media::after{content:"";position:absolute;inset:0;background:linear-gradient(180deg,rgba(9,20,26,0) 40%,rgba(9,20,26,.75) 100%)}
.hero-panel-cap{
  position:absolute;left:16px;right:16px;bottom:14px;z-index:2;
  font-size:13px;color:rgba(255,255,255,.9);letter-spacing:.02em;
}
.hero-panel-body{display:grid;grid-template-columns:1fr 1fr;gap:1px;background:rgba(255,255,255,.12)}
.hero-panel-cell{background:rgba(9,24,30,.55);padding:16px 18px}
.hero-panel-cell b{display:block;font-family:var(--font-serif);font-size:24px;line-height:1.2;color:#fff}
.hero-panel-cell small{display:block;margin-top:4px;font-size:12.5px;color:rgba(232,241,239,.72);letter-spacing:.02em}
/* ---------- pill bar ---------- */
.pill-bar{background:var(--surface);border-bottom:1px solid var(--line)}
.pill-bar-inner{display:flex;align-items:center;gap:10px;padding:14px 0;overflow-x:auto;scrollbar-width:thin}
.pill-bar-inner::-webkit-scrollbar{height:5px}
.pill-bar-inner::-webkit-scrollbar-thumb{background:rgba(14,26,35,.16);border-radius:999px}
.pill{
  flex:0 0 auto;display:inline-flex;align-items:center;gap:8px;
  padding:9px 18px;border-radius:999px;font-size:14px;color:var(--ink-2);
  border:1px solid var(--line-strong);background:var(--surface);white-space:nowrap;
  transition:background .2s ease,border-color .2s ease,color .2s ease,transform .2s ease,box-shadow .2s ease;
}
.pill:hover{border-color:var(--brand);color:var(--brand);transform:translateY(-2px);box-shadow:var(--shadow-sm)}
.pill.is-active{background:var(--brand);border-color:var(--brand);color:#fff;font-weight:600;box-shadow:0 8px 20px rgba(15,95,90,.24)}
.pill-note{margin-left:auto;flex:0 0 auto;font-size:13px;color:var(--muted);white-space:nowrap}
/* ---------- sections ---------- */
.section{padding:72px 0}
.section-tight{padding:56px 0}
.section-alt{background:var(--surface);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.section-head{max-width:44em;margin-bottom:38px}
.section-head.center{margin-left:auto;margin-right:auto;text-align:center}
.kicker{
  display:inline-flex;align-items:center;gap:9px;
  font-size:12.5px;letter-spacing:.14em;text-transform:uppercase;color:var(--brand);
  font-weight:700;
}
.kicker::before{content:"";width:22px;height:2px;border-radius:2px;background:var(--accent)}
.section-title{
  font-family:var(--font-serif);font-size:clamp(22px,2.6vw,30px);
  line-height:1.4;font-weight:700;margin:12px 0 12px;letter-spacing:.01em;
}
.section-sub{font-size:15.5px;color:var(--muted);line-height:1.82}
/* ---------- cards ---------- */
.grid-3{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:22px}
.grid-2{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:22px}
.grid-4{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:18px}
.card{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);
  padding:26px 24px;box-shadow:var(--shadow-sm);
  transition:transform .2s ease,box-shadow .2s ease,border-color .2s ease;
}
.card:hover{transform:translateY(-4px);box-shadow:var(--shadow-md);border-color:var(--line-strong)}
.card-icon{
  width:40px;height:40px;border-radius:11px;display:grid;place-items:center;
  background:var(--brand-soft);color:var(--brand-deep);margin-bottom:16px;
}
.card-icon svg{width:20px;height:20px;stroke:currentColor;fill:none;stroke-width:1.7;stroke-linecap:round;stroke-linejoin:round}
.card-title{font-size:17px;font-weight:700;line-height:1.5;margin-bottom:10px;letter-spacing:.01em}
.card-text{font-size:14.5px;color:var(--muted);line-height:1.8}
.card-tag{
  display:inline-block;margin-top:16px;padding:4px 11px;border-radius:999px;
  font-size:12.5px;background:var(--accent-soft);color:#8E5720;font-weight:600;letter-spacing:.02em;
}
.card-tag.tone{background:var(--brand-soft);color:var(--brand-deep)}
/* ---------- formula ---------- */
.formula-wrap{
  display:grid;grid-template-columns:minmax(0,.9fr) minmax(0,1.1fr);gap:44px;align-items:start;
}
.formula-left .section-sub{margin-top:6px}
.formula-equation{
  margin-top:26px;background:var(--ink);color:#EAF2F0;border-radius:var(--radius);
  padding:22px 24px;font-family:var(--font-serif);font-size:15px;line-height:2;
  border:1px solid rgba(255,255,255,.08);box-shadow:var(--shadow-md);
}
.formula-equation em{color:#7FD3C7;font-style:normal;font-weight:700}
.formula-equation i{color:#E7B275;font-style:normal}
.formula-list{display:grid;gap:14px}
.formula-item{
  display:grid;grid-template-columns:46px minmax(0,1fr);gap:16px;align-items:start;
  background:var(--surface);border:1px solid var(--line);border-radius:var(--radius-sm);
  padding:18px 20px;transition:transform .2s ease,box-shadow .2s ease,border-color .2s ease;
}
.formula-item:hover{transform:translateY(-3px);box-shadow:var(--shadow-md);border-color:var(--line-strong)}
.formula-num{
  width:38px;height:38px;border-radius:10px;display:grid;place-items:center;
  font-family:var(--font-serif);font-weight:700;font-size:16px;
  background:var(--brand);color:#fff;box-shadow:0 8px 18px rgba(15,95,90,.22);
}
.formula-item h3{font-size:16px;font-weight:700;margin-bottom:6px}
.formula-item p{font-size:14.5px;color:var(--muted);line-height:1.78}
/* ---------- steps ---------- */
.steps{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:0;border-top:1px solid var(--line)}
.step{padding:28px 26px 8px;border-right:1px solid var(--line);position:relative}
.step:last-child{border-right:0}
.step-num{
  font-family:var(--font-serif);font-size:13px;letter-spacing:.16em;font-weight:700;
  color:var(--accent);margin-bottom:12px;display:block;
}
.step h3{font-size:17px;font-weight:700;margin-bottom:10px;line-height:1.5}
.step p{font-size:14.5px;color:var(--muted);line-height:1.8}
.step-list{margin-top:14px;display:grid;gap:8px}
.step-list li{font-size:14px;color:var(--ink-2);padding-left:18px;position:relative;line-height:1.75}
.step-list li::before{
  content:"";position:absolute;left:0;top:9px;width:7px;height:7px;border-radius:2px;
  background:var(--brand);transform:rotate(45deg);
}
/* ---------- case cards ---------- */
.case-card{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);
  overflow:hidden;box-shadow:var(--shadow-sm);
  transition:transform .2s ease,box-shadow .2s ease,border-color .2s ease;
  display:flex;flex-direction:column;
}
.case-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-md);border-color:var(--line-strong)}
.case-img{aspect-ratio:16/10;overflow:hidden}
.case-img img{width:100%;height:100%;object-fit:cover;transition:transform .45s ease}
.case-card:hover .case-img img{transform:scale(1.05)}
.case-body{padding:22px 22px 24px;display:flex;flex-direction:column;gap:10px;flex:1}
.case-body h3{font-size:16.5px;font-weight:700;line-height:1.5}
.case-body p{font-size:14.5px;color:var(--muted);line-height:1.8}
.case-line{
  margin-top:auto;padding-top:14px;border-top:1px dashed var(--line-strong);
  font-family:var(--font-serif);font-size:14px;color:var(--brand-deep);font-weight:700;letter-spacing:.01em;
}
/* ---------- diff / check ---------- */
.diff-grid{display:grid;grid-template-columns:minmax(0,1.25fr) minmax(0,.75fr);gap:38px;align-items:start}
.table-card{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow-sm);overflow:hidden}
table.diff{width:100%;border-collapse:collapse;font-size:14.5px}
table.diff thead th{
  background:var(--brand-soft);color:var(--brand-deep);font-weight:700;font-size:13.5px;
  text-align:left;padding:14px 18px;letter-spacing:.03em;border-bottom:1px solid var(--line);
}
table.diff tbody td{padding:14px 18px;border-bottom:1px solid var(--line);color:var(--ink-2);line-height:1.7}
table.diff tbody tr:last-child td{border-bottom:0}
table.diff tbody tr{transition:background .18s ease}
table.diff tbody tr:hover{background:rgba(15,95,90,.045)}
table.diff td:first-child{font-weight:600;color:var(--ink);width:30%}
.check-card{
  background:var(--ink);color:#E9F1EF;border-radius:var(--radius);padding:28px 26px;
  border:1px solid rgba(255,255,255,.08);box-shadow:var(--shadow-md);
}
.check-card h3{font-family:var(--font-serif);font-size:19px;margin-bottom:8px;color:#fff}
.check-card > p{font-size:14px;color:rgba(233,241,239,.72);line-height:1.8}
.check-list{margin-top:20px;display:grid;gap:14px}
.check-list li{display:grid;grid-template-columns:22px minmax(0,1fr);gap:12px;font-size:14.5px;line-height:1.75;color:rgba(233,241,239,.9)}
.check-list li span.dot{
  width:20px;height:20px;border-radius:50%;display:grid;place-items:center;margin-top:3px;
  background:rgba(127,211,199,.16);border:1px solid rgba(127,211,199,.5);color:#7FD3C7;font-size:11px;
}
/* ---------- voices + stats ---------- */
.voices-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:22px}
.quote{
  background:var(--surface);border:1px solid var(--line);border-left:3px solid var(--accent);
  border-radius:var(--radius-sm);padding:24px 22px;box-shadow:var(--shadow-sm);
  transition:transform .2s ease,box-shadow .2s ease;
}
.quote:hover{transform:translateY(-3px);box-shadow:var(--shadow-md)}
.quote p{font-size:15px;line-height:1.85;color:var(--ink-2)}
.quote footer{margin-top:16px;display:flex;align-items:center;gap:10px;font-size:13px;color:var(--muted)}
.quote footer .avatar{
  width:30px;height:30px;border-radius:50%;display:grid;place-items:center;
  background:var(--brand-soft);color:var(--brand-deep);font-weight:700;font-size:13px;font-family:var(--font-serif);
}
.stats{
  margin-top:44px;display:grid;grid-template-columns:repeat(4,minmax(0,1fr));
  border-top:1px solid var(--line);border-bottom:1px solid var(--line);
}
.stat{padding:26px 22px;border-right:1px solid var(--line)}
.stat:last-child{border-right:0}
.stat b{display:block;font-family:var(--font-serif);font-size:32px;line-height:1.15;color:var(--brand-deep)}
.stat span{display:block;margin-top:6px;font-size:13.5px;color:var(--muted);line-height:1.7}
/* ---------- faq ---------- */
.faq{display:grid;gap:12px;max-width:900px}
.faq-item{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--radius-sm);
  padding:0 22px;transition:border-color .2s ease,box-shadow .2s ease,background .2s ease;
}
.faq-item[open]{border-color:var(--line-strong);box-shadow:var(--shadow-sm);background:#fff}
.faq-item summary{
  list-style:none;cursor:pointer;padding:20px 0;font-size:16px;font-weight:600;
  display:flex;align-items:center;justify-content:space-between;gap:18px;line-height:1.6;
}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary::after{
  content:"+";font-family:var(--font-serif);font-size:22px;color:var(--brand);
  transition:transform .2s ease;flex:0 0 auto;
}
.faq-item[open] summary::after{content:"–";transform:rotate(180deg)}
.faq-item .faq-a{padding:0 0 20px;font-size:14.8px;color:var(--muted);line-height:1.85;max-width:60em}
.faq-item summary:focus-visible{outline:2px solid var(--brand);outline-offset:4px;border-radius:6px}
/* ---------- news ---------- */
.news-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:22px}
.news-card{
  display:flex;flex-direction:column;gap:10px;
  background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);
  padding:24px 22px;box-shadow:var(--shadow-sm);
  transition:transform .2s ease,box-shadow .2s ease,border-color .2s ease;
}
.news-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-md);border-color:var(--line-strong)}
.news-card h3{font-size:16px;font-weight:700;line-height:1.6}
.news-card p{font-size:14px;color:var(--muted);line-height:1.78}
.news-meta{display:flex;align-items:center;gap:12px;margin-top:auto;padding-top:14px;border-top:1px solid var(--line);font-size:12.5px;color:var(--muted)}
.news-meta .cat{padding:3px 10px;border-radius:999px;background:var(--brand-soft);color:var(--brand-deep);font-weight:600}
.empty{
  grid-column:1/-1;padding:34px 26px;border:1px dashed var(--line-strong);border-radius:var(--radius);
  text-align:center;color:var(--muted);font-size:14.5px;background:var(--surface);
}
/* ---------- cta band ---------- */
.cta-band{position:relative;overflow:hidden;isolation:isolate;color:#fff}
.cta-bg{position:absolute;inset:0;z-index:-2}
.cta-bg img{width:100%;height:100%;object-fit:cover}
.cta-veil{position:absolute;inset:0;z-index:-1;background:linear-gradient(120deg,rgba(9,24,30,.95),rgba(10,71,68,.88))}
.cta-inner{display:grid;grid-template-columns:minmax(0,1.2fr) minmax(0,.8fr);gap:36px;align-items:center;padding:58px 0}
.cta-inner h2{font-family:var(--font-serif);font-size:clamp(22px,2.8vw,30px);line-height:1.42;margin-bottom:12px;color:#fff}
.cta-inner p{font-size:15px;color:rgba(233,241,239,.84);line-height:1.85;max-width:34em}
.cta-actions{display:flex;flex-wrap:wrap;gap:14px;justify-content:flex-end}
/* ---------- footer ---------- */
.site-footer{background:var(--ink);color:rgba(233,241,239,.82);padding:60px 0 0;margin-top:0}
.footer-grid{display:grid;grid-template-columns:minmax(0,1.5fr) minmax(0,.75fr) minmax(0,.75fr);gap:44px}
.footer-brand .brand{margin-bottom:16px}
.footer-brand .brand-text{color:#fff}
.footer-brand p{font-size:14px;line-height:1.85;color:rgba(233,241,239,.68);max-width:34em}
.footer-col h4{font-size:14px;letter-spacing:.1em;text-transform:uppercase;color:#fff;margin-bottom:16px;font-weight:700}
.footer-col a{display:block;font-size:14px;padding:7px 0;color:rgba(233,241,239,.74);transition:color .2s ease,transform .2s ease}
.footer-col a:hover{color:#7FD3C7;transform:translateX(3px)}
.footer-bottom{
  margin-top:44px;border-top:1px solid rgba(255,255,255,.12);
  padding:20px 0 26px;display:flex;flex-wrap:wrap;gap:12px;justify-content:space-between;
  font-size:13px;color:rgba(233,241,239,.6);
}
.footer-bottom a{color:rgba(233,241,239,.78);border-bottom:1px solid rgba(233,241,239,.28);transition:color .2s ease,border-color .2s ease}
.footer-bottom a:hover{color:#fff;border-color:#fff}
/* ---------- responsive ---------- */
@media (max-width:1024px){
  .hero-inner{grid-template-columns:1fr;gap:36px;padding:48px 0 46px}
  .hero-title{max-width:none}
  .formula-wrap{grid-template-columns:1fr;gap:32px}
  .diff-grid{grid-template-columns:1fr;gap:26px}
  .grid-3,.voices-grid,.news-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
  .grid-4{grid-template-columns:repeat(2,minmax(0,1fr))}
  .steps{grid-template-columns:1fr}
  .step{border-right:0;border-bottom:1px solid var(--line);padding:24px 0 20px}
  .step:last-child{border-bottom:0}
  .stats{grid-template-columns:repeat(2,minmax(0,1fr))}
  .stat{border-right:1px solid var(--line);border-bottom:1px solid var(--line)}
  .stat:nth-child(2n){border-right:0}
  .stat:nth-last-child(-n+2){border-bottom:0}
  .footer-grid{grid-template-columns:1fr 1fr;gap:34px}
  .footer-brand{grid-column:1/-1}
  .cta-inner{grid-template-columns:1fr;padding:44px 0}
  .cta-actions{justify-content:flex-start}
}
@media (max-width:860px){
  .main-nav{display:none}
  .header-cta{display:none}
  .nav-toggle{display:flex}
  .pill-note{display:none}
}
@media (max-width:768px){
  .wrap{padding:0 18px}
  .section{padding:54px 0}
  .section-tight{padding:44px 0}
  .grid-2,.grid-3,.grid-4,.voices-grid,.news-grid{grid-template-columns:1fr}
  .hero-panel-body{grid-template-columns:1fr 1fr}
  table.diff thead th,table.diff tbody td{padding:12px 13px;font-size:13.5px}
  table.diff td:first-child{width:36%}
  .card{padding:22px 20px}
  .footer-grid{grid-template-columns:1fr}
  .footer-bottom{flex-direction:column;gap:8px}
}
@media (max-width:520px){
  body.page{font-size:15px}
  .hero-title{font-size:27px}
  .hero-lead{font-size:14.5px}
  .hero-actions .btn{width:100%}
  .section-title{font-size:21px}
  .stat{padding:20px 14px}
  .stat b{font-size:26px}
  .nav-link{padding:8px 10px;font-size:14px}
  .quote{padding:20px 18px}
}

/* roulang page: category3 */
:root{
  --ink:#0E1A23;
  --ink-2:#1B2C38;
  --muted:#5E7180;
  --paper:#F6F4EF;
  --surface:#FFFFFF;
  --brand:#0F5F5A;
  --brand-deep:#0A4744;
  --brand-soft:#E8F1EF;
  --accent:#C27A34;
  --accent-soft:#F6EADF;
  --line:rgba(14,26,35,.09);
  --line-strong:rgba(14,26,35,.16);
  --radius:14px;
  --radius-sm:10px;
  --shadow-sm:0 2px 10px rgba(14,26,35,.05);
  --shadow-md:0 14px 34px rgba(14,26,35,.10);
  --shadow-lg:0 28px 70px rgba(14,26,35,.16);
  --font-sans:"Inter","PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,-apple-system,sans-serif;
  --font-serif:"Noto Serif SC","Songti SC","Source Han Serif SC","STSong",serif;
}
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{
  margin:0;
  font-family:var(--font-sans);
  background:var(--paper);
  color:var(--ink);
  font-size:16px;
  line-height:1.78;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}
img{display:block;max-width:100%;height:auto}
a{color:inherit;text-decoration:none}
button,input,textarea,select{font:inherit;color:inherit}
ul{margin:0;padding:0;list-style:none}
h1,h2,h3,h4,p{margin:0}
:focus-visible{outline:2px solid var(--brand);outline-offset:3px;border-radius:6px}
.wrap{width:100%;max-width:1180px;margin:0 auto;padding:0 24px}

/* ---------- header ---------- */
.site-header{
  position:sticky;top:0;z-index:60;
  background:rgba(246,244,239,.92);
  -webkit-backdrop-filter:saturate(180%) blur(12px);
  backdrop-filter:saturate(180%) blur(12px);
  border-bottom:1px solid transparent;
  transition:border-color .25s ease,box-shadow .25s ease,background .25s ease;
}
.site-header.is-scrolled{
  border-bottom-color:var(--line);
  box-shadow:0 6px 22px rgba(14,26,35,.07);
  background:rgba(246,244,239,.97);
}
.header-inner{display:flex;align-items:center;gap:20px;min-height:64px}
.brand{display:inline-flex;align-items:center;gap:10px;flex-shrink:0}
.brand-mark{
  width:32px;height:32px;border-radius:9px;display:grid;place-items:center;
  background:linear-gradient(140deg,var(--brand),#17a094);
  color:#fff;font-family:var(--font-serif);font-size:17px;line-height:1;
  box-shadow:0 6px 16px rgba(15,95,90,.28);
}
.brand-text{font-family:var(--font-serif);font-size:17px;font-weight:700;letter-spacing:.02em;white-space:nowrap}
.main-nav{display:flex;align-items:center;gap:4px;margin-left:auto}
.nav-link{
  padding:9px 14px;border-radius:9px;font-size:15px;color:var(--ink-2);
  transition:background .2s ease,color .2s ease,transform .2s ease;
  white-space:nowrap;
}
.nav-link:hover{background:rgba(15,95,90,.08);color:var(--brand);transform:translateY(-1px)}
.nav-link.is-active{background:var(--brand-soft);color:var(--brand-deep);font-weight:600}
.header-cta{display:flex;align-items:center;gap:10px;margin-left:8px}
.nav-toggle{
  display:none;width:42px;height:42px;border-radius:10px;border:1px solid var(--line-strong);
  background:var(--surface);align-items:center;justify-content:center;cursor:pointer;
  transition:border-color .2s ease,background .2s ease;margin-left:auto;
}
.nav-toggle:hover{border-color:var(--brand);background:var(--brand-soft)}
.nav-toggle span{display:block;width:18px;height:2px;background:var(--ink);border-radius:2px;position:relative}
.nav-toggle span::before,.nav-toggle span::after{content:"";position:absolute;left:0;width:18px;height:2px;background:var(--ink);border-radius:2px;transition:transform .22s ease}
.nav-toggle span::before{top:-6px}
.nav-toggle span::after{top:6px}
.mobile-nav{display:none;background:var(--surface);border-top:1px solid var(--line)}
.mobile-nav.is-open{display:block}
.mobile-nav ul{padding:12px 24px 20px;display:grid;gap:4px}
.mobile-nav a{
  display:block;padding:12px 14px;border-radius:10px;font-size:15px;color:var(--ink-2);
  transition:background .2s ease,color .2s ease;min-height:44px;
}
.mobile-nav a:hover,.mobile-nav a.is-active{background:var(--brand-soft);color:var(--brand-deep)}

/* ---------- buttons ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  min-height:44px;padding:12px 24px;border-radius:8px;border:1px solid transparent;
  font-size:15px;font-weight:600;letter-spacing:.01em;cursor:pointer;
  transition:transform .2s ease,box-shadow .2s ease,background .2s ease,border-color .2s ease,color .2s ease;
}
.btn-sm{min-height:38px;padding:8px 16px;font-size:14px;border-radius:8px}
.btn-primary{background:var(--brand);color:#fff;box-shadow:0 10px 24px rgba(15,95,90,.24)}
.btn-primary:hover{background:var(--brand-deep);transform:translateY(-2px);box-shadow:0 14px 30px rgba(15,95,90,.3)}
.btn-primary:active{transform:translateY(0)}
.btn-ghost{background:rgba(255,255,255,.06);border-color:rgba(255,255,255,.34);color:#fff}
.btn-ghost:hover{background:rgba(255,255,255,.14);border-color:rgba(255,255,255,.6);transform:translateY(-2px)}
.btn-outline{background:transparent;border-color:var(--line-strong);color:var(--ink)}
.btn-outline:hover{border-color:var(--brand);color:var(--brand);background:var(--brand-soft);transform:translateY(-2px)}
.btn-block{width:100%}

/* ---------- hero ---------- */
.hero{position:relative;overflow:hidden;color:#fff;isolation:isolate}
.hero-bg{position:absolute;inset:0;z-index:-2}
.hero-bg img{width:100%;height:100%;object-fit:cover;object-position:center}
.hero-veil{
  position:absolute;inset:0;z-index:-1;
  background:
    radial-gradient(120% 90% at 78% 10%,rgba(18,120,110,.42),transparent 62%),
    linear-gradient(155deg,rgba(9,20,26,.95) 0%,rgba(9,24,30,.87) 48%,rgba(9,20,26,.96) 100%);
}
.hero-inner{
  display:grid;grid-template-columns:minmax(0,1.15fr) minmax(0,.85fr);
  gap:52px;align-items:center;padding:72px 24px 66px;
}
.hero-badge{
  display:inline-flex;align-items:center;gap:9px;
  padding:7px 15px;border-radius:999px;font-size:13px;letter-spacing:.06em;
  background:rgba(255,255,255,.1);border:1px solid rgba(255,255,255,.2);color:#DDEDEA;
}
.hero-badge::before{content:"";width:7px;height:7px;border-radius:50%;background:#4FC3B6;box-shadow:0 0 0 4px rgba(79,195,182,.2)}
.hero-title{
  font-family:var(--font-serif);
  font-size:clamp(28px,4vw,42px);
  line-height:1.3;letter-spacing:.01em;font-weight:700;
  margin:20px 0 18px;max-width:18em;
}
.hero-lead{font-size:15.5px;line-height:1.85;color:rgba(232,241,239,.86);max-width:36em}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:30px}
.hero-tags{display:flex;flex-wrap:wrap;gap:10px;margin-top:26px}
.hero-tag{
  padding:6px 14px;border-radius:999px;font-size:13px;color:#CFE3E0;
  background:rgba(255,255,255,.07);border:1px solid rgba(255,255,255,.16);
}
.hero-panel{
  background:rgba(255,255,255,.07);
  border:1px solid rgba(255,255,255,.18);
  border-radius:var(--radius);
  padding:26px 26px 22px;
  -webkit-backdrop-filter:blur(8px);
  backdrop-filter:blur(8px);
  box-shadow:0 24px 60px rgba(0,0,0,.24);
}
.panel-title{font-size:15px;font-weight:700;letter-spacing:.04em;color:#EAF3F1;margin-bottom:16px}
.panel-list{display:grid;gap:10px}
.panel-list li{
  display:flex;align-items:center;justify-content:space-between;gap:12px;
  padding:10px 14px;border-radius:var(--radius-sm);
  background:rgba(255,255,255,.06);border:1px solid rgba(255,255,255,.1);
  font-size:14px;color:rgba(232,241,239,.9);
}
.panel-list b{color:#7FD8CC;font-weight:700;font-variant-numeric:tabular-nums}
.panel-note{margin-top:16px;font-size:12.5px;line-height:1.7;color:rgba(232,241,239,.62)}

/* ---------- pill bar ---------- */
.pill-bar{background:var(--surface);border-bottom:1px solid var(--line);position:relative;z-index:5}
.pill-inner{display:flex;gap:10px;overflow-x:auto;padding:14px 24px;scrollbar-width:none}
.pill-inner::-webkit-scrollbar{display:none}
.pill{
  flex:0 0 auto;padding:8px 16px;border-radius:999px;border:1px solid var(--line);
  background:var(--paper);font-size:14px;color:var(--ink-2);white-space:nowrap;
  transition:background .2s ease,color .2s ease,border-color .2s ease,transform .2s ease;
}
.pill:hover{border-color:var(--brand);color:var(--brand);background:var(--brand-soft);transform:translateY(-1px)}
.pill.is-active{background:var(--brand);color:#fff;border-color:var(--brand);font-weight:600}

/* ---------- sections ---------- */
.section{padding:76px 0}
.section-alt{background:var(--surface);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.section-head{max-width:760px;margin-bottom:38px}
.kicker{display:inline-flex;align-items:center;gap:9px;font-size:13px;letter-spacing:.12em;color:var(--brand);font-weight:600}
.kicker::before{content:"";width:26px;height:2px;background:var(--accent);border-radius:2px}
.section-title{font-family:var(--font-serif);font-size:clamp(23px,2.6vw,31px);line-height:1.4;font-weight:700;margin:12px 0 12px}
.section-lead{color:var(--muted);font-size:15.5px}
.grid{display:grid;gap:22px}
.grid-2{grid-template-columns:repeat(2,minmax(0,1fr))}
.grid-3{grid-template-columns:repeat(3,minmax(0,1fr))}
.grid-4{grid-template-columns:repeat(4,minmax(0,1fr))}

/* ---------- cards ---------- */
.card{
  display:flex;flex-direction:column;overflow:hidden;
  background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);
  box-shadow:var(--shadow-sm);
  transition:transform .2s ease,box-shadow .2s ease,border-color .2s ease;
}
.card:hover{transform:translateY(-4px);box-shadow:var(--shadow-md);border-color:rgba(15,95,90,.3)}
.card-media{aspect-ratio:16/9;overflow:hidden;background:var(--brand-soft)}
.card-media img{width:100%;height:100%;object-fit:cover;transition:transform .35s ease}
.card:hover .card-media img{transform:scale(1.04)}
.card-body{padding:22px;display:flex;flex-direction:column;flex:1}
.card-icon{
  width:38px;height:38px;border-radius:10px;display:grid;place-items:center;
  background:var(--brand-soft);color:var(--brand);margin-bottom:14px;flex:0 0 auto;
}
.card-icon svg{width:20px;height:20px;stroke:currentColor;fill:none;stroke-width:1.7;stroke-linecap:round;stroke-linejoin:round}
.card-title{font-size:17px;font-weight:700;line-height:1.5;margin-bottom:8px}
.card-text{font-size:14.5px;color:var(--muted);line-height:1.78}
.tag{
  display:inline-block;align-self:flex-start;margin-top:16px;padding:4px 11px;border-radius:999px;
  background:var(--accent-soft);color:#8A5620;font-size:12.5px;font-weight:600;
}

/* ---------- steps ---------- */
.steps{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:20px}
.step{
  position:relative;padding:26px 22px 24px;background:var(--surface);
  border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow-sm);
  transition:transform .2s ease,box-shadow .2s ease,border-color .2s ease;
}
.step:hover{transform:translateY(-4px);box-shadow:var(--shadow-md);border-color:rgba(194,122,52,.4)}
.step-num{font-family:var(--font-serif);font-size:26px;font-weight:700;color:var(--accent);line-height:1}
.step-title{font-size:16px;font-weight:700;margin:12px 0 8px}
.step-text{font-size:14px;color:var(--muted);line-height:1.75}

/* ---------- stats ---------- */
.stats{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));background:var(--ink);border-radius:var(--radius);overflow:hidden;box-shadow:var(--shadow-md)}
.stat{padding:32px 22px;text-align:center;border-right:1px solid rgba(255,255,255,.1)}
.stat:last-child{border-right:0}
.stat b{display:block;font-family:var(--font-serif);font-size:32px;line-height:1.2;color:#fff;font-variant-numeric:tabular-nums}
.stat span{display:block;margin-top:8px;font-size:13.5px;color:rgba(232,241,239,.72)}

/* ---------- table ---------- */
.table-wrap{
  overflow-x:auto;border:1px solid var(--line);border-radius:var(--radius);
  background:var(--surface);box-shadow:var(--shadow-sm);
}
table{width:100%;border-collapse:collapse;min-width:700px}
th{
  background:var(--brand-soft);color:var(--brand-deep);text-align:left;
  padding:14px 18px;font-size:13.5px;font-weight:700;letter-spacing:.04em;white-space:nowrap;
}
td{padding:15px 18px;font-size:14.5px;color:var(--ink-2);border-top:1px solid var(--line);line-height:1.7}
tbody tr{transition:background .2s ease}
tbody tr:hover{background:rgba(15,95,90,.04)}
td b{color:var(--brand-deep);font-variant-numeric:tabular-nums}
.table-note{margin-top:14px;font-size:13px;color:var(--muted)}

/* ---------- quotes ---------- */
.quote{
  background:var(--surface);border:1px solid var(--line);border-left:3px solid var(--accent);
  border-radius:var(--radius-sm);padding:22px 24px;box-shadow:var(--shadow-sm);
  transition:transform .2s ease,box-shadow .2s ease;
}
.quote:hover{transform:translateY(-3px);box-shadow:var(--shadow-md)}
.quote p{font-size:15px;color:var(--ink-2);line-height:1.8}
.quote cite{display:block;margin-top:14px;font-style:normal;font-size:13.5px;color:var(--muted)}

/* ---------- faq ---------- */
.faq-list{max-width:880px}
.faq-item{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--radius-sm);
  margin-bottom:12px;box-shadow:var(--shadow-sm);overflow:hidden;
  transition:border-color .2s ease,box-shadow .2s ease;
}
.faq-item:hover{border-color:rgba(15,95,90,.28);box-shadow:0 8px 22px rgba(14,26,35,.08)}
.faq-item summary{
  cursor:pointer;padding:18px 54px 18px 22px;font-weight:600;font-size:15.5px;
  position:relative;list-style:none;color:var(--ink);
}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary::after{
  content:"+";position:absolute;right:22px;top:50%;transform:translateY(-50%);
  font-size:20px;line-height:1;color:var(--brand);transition:transform .2s ease;
}
.faq-item[open] summary::after{content:"\2212"}
.faq-body{padding:0 22px 20px;color:var(--muted);font-size:14.5px;line-height:1.85}

/* ---------- cta band ---------- */
.cta-band{
  position:relative;overflow:hidden;border-radius:var(--radius);
  padding:56px 44px;color:#fff;isolation:isolate;
  background:linear-gradient(135deg,var(--brand-deep) 0%,#0b3a38 55%,#123036 100%);
  box-shadow:var(--shadow-lg);
}
.cta-band::after{
  content:"";position:absolute;right:-90px;top:-90px;width:320px;height:320px;border-radius:50%;
  background:radial-gradient(circle,rgba(79,195,182,.32),transparent 68%);z-index:-1;
}
.cta-title{font-family:var(--font-serif);font-size:clamp(22px,2.6vw,30px);font-weight:700;line-height:1.4}
.cta-text{margin-top:14px;max-width:44em;font-size:15px;line-height:1.85;color:rgba(232,241,239,.84)}
.cta-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:28px}

/* ---------- footer ---------- */
.site-footer{background:#0B171D;color:rgba(232,241,239,.72);margin-top:0;border-top:1px solid rgba(255,255,255,.08)}
.footer-grid{
  display:grid;grid-template-columns:minmax(0,1.6fr) minmax(0,1fr) minmax(0,1fr);
  gap:44px;padding:58px 24px 40px;
}
.footer-brand .brand{margin-bottom:16px}
.footer-brand .brand-text{color:#fff}
.footer-brand p{font-size:14px;line-height:1.85;max-width:34em;color:rgba(232,241,239,.66)}
.footer-col h4{font-size:14px;font-weight:700;letter-spacing:.08em;color:#fff;margin-bottom:16px}
.footer-col a{
  display:block;padding:7px 0;font-size:14px;color:rgba(232,241,239,.68);
  transition:color .2s ease,transform .2s ease;
}
.footer-col a:hover{color:#7FD8CC;transform:translateX(3px)}
.footer-bottom{
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:12px;
  padding:20px 24px 30px;border-top:1px solid rgba(255,255,255,.08);
  font-size:13px;color:rgba(232,241,239,.5);
}
.footer-bottom a{color:rgba(232,241,239,.62);transition:color .2s ease}
.footer-bottom a:hover{color:#7FD8CC}

/* ---------- responsive ---------- */
@media (max-width:1024px){
  .hero-inner{grid-template-columns:1fr;gap:38px;padding:60px 24px 54px}
  .hero-panel{max-width:560px}
  .grid-4{grid-template-columns:repeat(2,minmax(0,1fr))}
  .steps{grid-template-columns:repeat(2,minmax(0,1fr))}
  .stats{grid-template-columns:repeat(2,minmax(0,1fr))}
  .stat:nth-child(2){border-right:0}
  .stat:nth-child(n+3){border-top:1px solid rgba(255,255,255,.1)}
  .footer-grid{grid-template-columns:1fr 1fr;gap:34px}
  .footer-brand{grid-column:1 / -1}
}
@media (max-width:880px){
  .main-nav,.header-cta{display:none}
  .nav-toggle{display:flex}
  .section{padding:58px 0}
}
@media (max-width:768px){
  body{font-size:15.5px}
  .grid-3,.grid-2{grid-template-columns:1fr}
  .hero-title{font-size:clamp(25px,6.4vw,32px)}
  .hero-actions .btn{flex:1 1 190px}
  .cta-band{padding:40px 24px}
  .footer-grid{padding:44px 24px 30px}
  .footer-bottom{font-size:12.5px;padding:18px 24px 26px}
}
@media (max-width:520px){
  .grid-4,.steps,.stats{grid-template-columns:1fr}
  .stat{border-right:0;border-top:1px solid rgba(255,255,255,.1)}
  .stat:first-child{border-top:0}
  .hero-tags{gap:8px}
  .hero-tag{font-size:12.5px;padding:5px 12px}
  .btn{width:100%}
  .hero-actions .btn{flex:1 1 100%}
  .cta-actions .btn{width:100%}
  .brand-text{font-size:15.5px}
}