/* roulang page: index */
:root{
      --bg:#F7FBFA;
      --surface:#FFFFFF;
      --surface-2:#EAF8F5;
      --brand:#16A085;
      --brand-dark:#0F8B73;
      --accent:#FF7A59;
      --text:#111827;
      --muted:#5F6B7A;
      --line:#DCEBE7;
      --shadow:0 12px 30px rgba(16, 185, 129, .08);
      --shadow-strong:0 18px 38px rgba(16, 185, 129, .12);
      --radius:24px;
      --radius-sm:16px;
      --header-bg:rgba(247, 251, 250, .80);
    }

    * { box-sizing: border-box; }
    html { scroll-behavior: smooth; }
    body{
      margin:0;
      font-family: system-ui, -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
      color: var(--text);
      background:
        radial-gradient(900px 420px at 12% 0%, rgba(22,160,133,.12), transparent 60%),
        radial-gradient(700px 360px at 96% 12%, rgba(255,122,89,.10), transparent 48%),
        linear-gradient(180deg, #F8FCFB 0%, #F7FBFA 35%, #F6FAF8 100%);
      line-height: 1.75;
      text-rendering: optimizeLegibility;
      -webkit-font-smoothing: antialiased;
    }
    a{
      color: inherit;
      text-decoration: none;
      transition: color .2s ease, opacity .2s ease, transform .2s ease, background-color .2s ease, border-color .2s ease, box-shadow .2s ease;
    }
    img{ max-width:100%; display:block; }
    button, input, select, textarea { font: inherit; }
    ::selection{ background: rgba(22,160,133,.18); color: var(--text); }

    .container{
      width: min(100% - 1.5rem, 1240px);
      margin-inline: auto;
    }
    .section-pad{
      padding-top: 4.8rem;
      padding-bottom: 4.8rem;
    }
    .section-title{
      font-size: clamp(1.8rem, 2.3vw, 2.5rem);
      line-height: 1.18;
      letter-spacing: -0.02em;
      color: #0f172a;
    }
    .section-subtitle{
      color: var(--muted);
      font-size: 1rem;
      line-height: 1.8;
      max-width: 54rem;
    }
    .soft-card{
      background: rgba(255,255,255,.96);
      border: 1px solid rgba(220,235,231,.95);
      border-radius: var(--radius);
      box-shadow: var(--shadow);
      backdrop-filter: blur(10px);
    }
    .soft-card:hover{
      border-color: rgba(22,160,133,.28);
      box-shadow: var(--shadow-strong);
      transform: translateY(-3px);
    }
    .soft-card,
    .soft-card *{
      transition: transform .22s ease, box-shadow .22s ease, border-color .22s ease, background-color .22s ease, color .22s ease, opacity .22s ease;
    }
    .badge{
      display:inline-flex;
      align-items:center;
      gap:.45rem;
      padding:.42rem .8rem;
      border-radius:999px;
      background: rgba(22,160,133,.09);
      color: var(--brand-dark);
      border: 1px solid rgba(22,160,133,.18);
      font-size: .88rem;
      font-weight: 600;
      letter-spacing: .01em;
    }
    .badge-soft{
      background: rgba(255,122,89,.10);
      color: #c2410c;
      border-color: rgba(255,122,89,.18);
    }
    .btn{
      display:inline-flex;
      align-items:center;
      justify-content:center;
      gap:.55rem;
      min-height: 46px;
      padding: .8rem 1.2rem;
      border-radius: 16px;
      border: 1px solid transparent;
      font-weight: 700;
      letter-spacing: .01em;
      cursor: pointer;
      user-select: none;
      white-space: nowrap;
      outline: none;
    }
    .btn-primary{
      background: linear-gradient(135deg, var(--brand) 0%, #18b08e 100%);
      color: #fff;
      box-shadow: 0 12px 24px rgba(22,160,133,.18);
    }
    .btn-primary:hover{
      transform: translateY(-2px);
      background: linear-gradient(135deg, var(--brand-dark) 0%, #16997e 100%);
      box-shadow: 0 16px 28px rgba(22,160,133,.24);
    }
    .btn-secondary{
      background: rgba(255,255,255,.9);
      color: var(--brand-dark);
      border-color: rgba(22,160,133,.18);
      box-shadow: 0 8px 18px rgba(16, 24, 40, .04);
    }
    .btn-secondary:hover{
      transform: translateY(-2px);
      border-color: rgba(22,160,133,.35);
      background: rgba(234,248,245,.88);
    }
    .btn-ghost{
      background: transparent;
      color: var(--text);
      border-color: rgba(220,235,231,.95);
    }
    .btn-ghost:hover{
      background: rgba(234,248,245,.7);
      border-color: rgba(22,160,133,.20);
    }
    .focus-ring:focus-visible,
    .btn:focus-visible,
    a:focus-visible,
    input:focus-visible,
    select:focus-visible,
    textarea:focus-visible{
      outline: none;
      box-shadow: 0 0 0 4px rgba(22,160,133,.14);
      border-color: rgba(22,160,133,.55) !important;
    }

    .site-header{
      position: fixed;
      inset: 0 0 auto 0;
      z-index: 60;
      background: var(--header-bg);
      backdrop-filter: blur(18px);
      border-bottom: 1px solid transparent;
      transition: background-color .25s ease, box-shadow .25s ease, border-color .25s ease, transform .25s ease;
    }
    .site-header.is-scrolled{
      background: rgba(255,255,255,.95);
      border-bottom-color: rgba(220,235,231,.9);
      box-shadow: 0 14px 34px rgba(16, 24, 40, .08);
    }
    .header-top{
      display:flex;
      align-items:center;
      justify-content:space-between;
      gap:1rem;
      padding: .95rem 0 .7rem;
      overflow: hidden;
      max-height: 88px;
      transition: max-height .25s ease, opacity .25s ease, padding .25s ease;
    }
    .site-header.is-scrolled .header-top{
      max-height: 0;
      opacity: 0;
      padding: 0;
    }
    .header-nav{
      display:flex;
      align-items:center;
      justify-content:space-between;
      gap:1rem;
      padding: .72rem 0 .95rem;
      transition: padding .25s ease;
    }
    .site-header.is-scrolled .header-nav{
      padding-top: .82rem;
      padding-bottom: .82rem;
    }
    .nav-links{
      display:flex;
      align-items:center;
      gap:.25rem;
      flex-wrap: wrap;
    }
    .nav-link{
      padding: .72rem .9rem;
      border-radius: 999px;
      color: #334155;
      font-weight: 600;
      font-size: .95rem;
    }
    .nav-link:hover{
      background: rgba(22,160,133,.09);
      color: var(--brand-dark);
    }
    .nav-link.is-active{
      background: rgba(22,160,133,.12);
      color: var(--brand-dark);
      border: 1px solid rgba(22,160,133,.16);
    }
    .logo-mark{
      width: 2.5rem;
      height: 2.5rem;
      border-radius: 16px;
      background: linear-gradient(135deg, rgba(22,160,133,1), rgba(24,176,142,1));
      display:grid;
      place-items:center;
      box-shadow: 0 10px 24px rgba(22,160,133,.20);
      color:#fff;
      flex-shrink:0;
    }
    .brand-pill{
      display:inline-flex;
      align-items:center;
      gap:.75rem;
      padding: .5rem .8rem .5rem .55rem;
      border-radius: 999px;
      background: rgba(255,255,255,.74);
      border: 1px solid rgba(220,235,231,.98);
      box-shadow: 0 8px 20px rgba(16,24,40,.04);
    }
    .brand-name{
      font-size: 1.03rem;
      font-weight: 800;
      letter-spacing: .01em;
      color: #0f172a;
    }
    .brand-sub{
      font-size: .82rem;
      color: var(--muted);
    }
    .header-note{
      display:inline-flex;
      align-items:center;
      gap:.5rem;
      padding:.52rem .82rem;
      border-radius:999px;
      background: rgba(234,248,245,.9);
      color: #0f766e;
      border: 1px solid rgba(22,160,133,.14);
      font-size: .88rem;
      font-weight: 600;
    }
    .mobile-toggle{
      width: 46px;
      height: 46px;
      border-radius: 14px;
      border: 1px solid rgba(220,235,231,.95);
      background: rgba(255,255,255,.9);
      color: var(--text);
      display: inline-flex;
      align-items:center;
      justify-content:center;
      box-shadow: 0 8px 18px rgba(16,24,40,.04);
    }
    .mobile-menu{
      display:none;
      padding-bottom: .85rem;
    }
    .mobile-menu.is-open{ display:block; }
    .mobile-menu-panel{
      border: 1px solid rgba(220,235,231,.95);
      background: rgba(255,255,255,.96);
      border-radius: 22px;
      box-shadow: var(--shadow-strong);
      padding: .85rem;
    }
    .mobile-menu a{
      display:flex;
      align-items:center;
      justify-content:space-between;
      padding: .9rem 1rem;
      border-radius: 16px;
      color: #0f172a;
      font-weight: 600;
    }
    .mobile-menu a:hover{
      background: rgba(22,160,133,.08);
      color: var(--brand-dark);
    }

    .hero-wrap{
      position: relative;
      overflow: hidden;
      border-radius: 34px;
      background:
        radial-gradient(1200px 420px at 10% 8%, rgba(22,160,133,.14), transparent 55%),
        radial-gradient(700px 300px at 92% 24%, rgba(255,122,89,.12), transparent 45%),
        linear-gradient(180deg, rgba(255,255,255,.95), rgba(234,248,245,.72));
      border: 1px solid rgba(220,235,231,.98);
      box-shadow: 0 22px 44px rgba(16,24,40,.08);
    }
    .hero-wrap::before,
    .hero-wrap::after{
      content:"";
      position:absolute;
      inset:auto;
      border-radius:999px;
      pointer-events:none;
      opacity:.75;
    }
    .hero-wrap::before{
      width: 18rem;
      height: 18rem;
      right: -6rem;
      top: -5rem;
      background: radial-gradient(circle, rgba(22,160,133,.15), transparent 68%);
    }
    .hero-wrap::after{
      width: 14rem;
      height: 14rem;
      left: -5rem;
      bottom: -4rem;
      background: radial-gradient(circle, rgba(255,122,89,.12), transparent 70%);
    }
    .hero-copy{
      position: relative;
      z-index: 1;
    }
    .hero-title{
      font-size: clamp(2.05rem, 4vw, 4.1rem);
      line-height: 1.08;
      letter-spacing: -0.04em;
      color: #0f172a;
      text-wrap: balance;
    }
    .hero-desc{
      font-size: 1.03rem;
      color: #475569;
      line-height: 1.9;
      max-width: 42rem;
    }
    .hero-badges{
      display:flex;
      flex-wrap:wrap;
      gap:.65rem;
    }

    .metric-card{
      position: relative;
      overflow: hidden;
      padding: 1.15rem;
      border-radius: 24px;
      background: linear-gradient(180deg, rgba(255,255,255,.98), rgba(247,251,250,.95));
      border: 1px solid rgba(220,235,231,.98);
      box-shadow: var(--shadow);
    }
    .metric-card::after{
      content:"";
      position:absolute;
      inset:auto -1.5rem -1.8rem auto;
      width: 6rem;
      height: 6rem;
      border-radius: 999px;
      background: radial-gradient(circle, rgba(22,160,133,.12), transparent 64%);
      pointer-events:none;
    }
    .metric-label{
      font-size: .88rem;
      color: var(--muted);
      font-weight: 600;
    }
    .metric-title{
      font-size: 1.18rem;
      line-height: 1.2;
      color:#0f172a;
      font-weight: 800;
      letter-spacing: -.01em;
    }
    .metric-text{
      color:#475569;
      font-size: .95rem;
      line-height: 1.7;
    }
    .metric-pill{
      display:inline-flex;
      align-items:center;
      gap:.35rem;
      padding:.32rem .62rem;
      border-radius:999px;
      background: rgba(22,160,133,.09);
      color: var(--brand-dark);
      font-size:.78rem;
      font-weight:700;
    }

    .icon-badge{
      width: 2.55rem;
      height: 2.55rem;
      border-radius: 16px;
      background: linear-gradient(180deg, rgba(22,160,133,.12), rgba(22,160,133,.06));
      border: 1px solid rgba(22,160,133,.12);
      display:grid;
      place-items:center;
      color: var(--brand-dark);
      flex-shrink:0;
    }

    .split-panel{
      border-radius: 28px;
      border: 1px solid rgba(220,235,231,.98);
      background: rgba(255,255,255,.97);
      box-shadow: var(--shadow);
      overflow:hidden;
    }
    .split-panel .panel-head{
      padding: 1.2rem 1.2rem .6rem;
      border-bottom: 1px solid rgba(220,235,231,.75);
      background: linear-gradient(180deg, rgba(234,248,245,.95), rgba(255,255,255,.96));
    }
    .split-panel .panel-body{
      padding: 1.15rem 1.2rem 1.2rem;
    }

    .step-number{
      width: 2rem;
      height: 2rem;
      border-radius: 999px;
      display:grid;
      place-items:center;
      background: rgba(22,160,133,.12);
      color: var(--brand-dark);
      font-weight: 800;
      font-size: .9rem;
      flex-shrink:0;
    }

    .compare-connector{
      display:grid;
      place-items:center;
      color: var(--brand-dark);
      font-size: 2rem;
      font-weight: 800;
      opacity:.82;
    }

    .progress{
      height: .6rem;
      border-radius:999px;
      background: #edf5f2;
      overflow:hidden;
    }
    .progress > span{
      display:block;
      height:100%;
      border-radius: inherit;
      background: linear-gradient(90deg, rgba(22,160,133,1), rgba(24,176,142,1));
    }

    .faq-item{
      border: 1px solid rgba(220,235,231,.98);
      border-radius: 22px;
      background: rgba(255,255,255,.98);
      box-shadow: var(--shadow);
      overflow:hidden;
    }
    .faq-item.is-open{
      border-color: rgba(22,160,133,.24);
    }
    .faq-head{
      width:100%;
      display:flex;
      align-items:center;
      justify-content:space-between;
      gap:1rem;
      padding: 1rem 1.1rem;
      background: transparent;
      border: 0;
      text-align:left;
      cursor:pointer;
      color:#0f172a;
      font-weight: 800;
    }
    .faq-head:hover{
      background: rgba(234,248,245,.58);
    }
    .faq-answer{
      max-height: 0;
      overflow:hidden;
      transition: max-height .35s ease;
      border-top: 1px solid rgba(220,235,231,.75);
      background: linear-gradient(180deg, rgba(247,251,250,.92), rgba(255,255,255,.96));
    }
    .faq-item.is-open .faq-answer{
      max-height: 16rem;
    }
    .faq-answer-inner{
      padding: 1rem 1.1rem 1.05rem;
      color:#475569;
      line-height:1.85;
    }
    .faq-plus{
      width:2rem;
      height:2rem;
      border-radius: 999px;
      display:grid;
      place-items:center;
      color: var(--brand-dark);
      background: rgba(22,160,133,.10);
      flex-shrink:0;
      font-size:1.1rem;
      line-height: 1;
    }

    .field{
      width:100%;
      border-radius: 16px;
      border: 1px solid rgba(220,235,231,.98);
      background: rgba(255,255,255,.98);
      color: #0f172a;
      padding: .95rem 1rem;
      outline:none;
      transition: border-color .2s ease, box-shadow .2s ease, background-color .2s ease, transform .2s ease;
    }
    .field::placeholder{ color:#94a3b8; }
    .field:focus{
      border-color: rgba(22,160,133,.52);
      box-shadow: 0 0 0 4px rgba(22,160,133,.12);
      background: #fff;
    }

    .latest-grid{
      display:grid;
      grid-template-columns: 1.05fr .95fr;
      gap: 1rem;
    }
    .latest-main{
      padding: 1.25rem;
      border-radius: 28px;
      background:
        radial-gradient(700px 260px at 100% 0%, rgba(22,160,133,.11), transparent 48%),
        linear-gradient(180deg, rgba(255,255,255,.98), rgba(247,251,250,.95));
      border: 1px solid rgba(220,235,231,.98);
      box-shadow: var(--shadow);
    }
    .latest-list{
      display:grid;
      gap: .9rem;
    }
    .latest-item{
      padding: 1rem 1rem .95rem;
      border-radius: 22px;
      border: 1px solid rgba(220,235,231,.98);
      background: rgba(255,255,255,.98);
      box-shadow: 0 10px 22px rgba(16,24,40,.04);
    }
    .latest-item:hover{
      border-color: rgba(22,160,133,.26);
      box-shadow: 0 16px 26px rgba(16,160,133,.10);
      transform: translateY(-2px);
    }

    .footer{
      background: linear-gradient(180deg, #eef7f4 0%, #eaf6f2 100%);
      border-top: 1px solid rgba(220,235,231,.98);
    }
    .footer-link{
      color: #475569;
    }
    .footer-link:hover{
      color: var(--brand-dark);
    }

    .hero-stage{
      position: relative;
      min-height: 34rem;
      border-radius: 30px;
      overflow:hidden;
      background:
        linear-gradient(180deg, rgba(12,19,31,.98) 0%, rgba(20,30,45,.98) 55%, rgba(20,34,31,.95) 100%);
      box-shadow: 0 18px 42px rgba(15,23,42,.18);
      border: 1px solid rgba(255,255,255,.08);
    }
    .hero-stage::before{
      content:"";
      position:absolute;
      inset: 0;
      background:
        radial-gradient(circle at 28% 18%, rgba(22,160,133,.16), transparent 25%),
        radial-gradient(circle at 78% 24%, rgba(255,122,89,.14), transparent 22%),
        linear-gradient(180deg, rgba(255,255,255,.02), rgba(255,255,255,.00));
      pointer-events:none;
    }
    .hero-stage-grid{
      position:absolute;
      inset: 0;
      background-image: linear-gradient(rgba(255,255,255,.06) 1px, transparent 1px), linear-gradient(90deg, rgba(255,255,255,.06) 1px, transparent 1px);
      background-size: 28px 28px;
      opacity: .22;
      mask-image: radial-gradient(circle at center, black 42%, transparent 90%);
      pointer-events:none;
    }
    .poster-card{
      background: rgba(255,255,255,.06);
      border: 1px solid rgba(255,255,255,.10);
      border-radius: 24px;
      backdrop-filter: blur(10px);
      box-shadow: 0 18px 34px rgba(0,0,0,.16);
    }
    .poster-card .line{
      height: 8px;
      border-radius: 999px;
      background: rgba(255,255,255,.13);
      overflow:hidden;
    }
    .poster-card .line > span{
      display:block;
      height:100%;
      border-radius: inherit;
      background: linear-gradient(90deg, rgba(22,160,133,1), rgba(255,122,89,.95));
    }
    .poster-chip{
      display:inline-flex;
      align-items:center;
      gap:.35rem;
      border-radius:999px;
      background: rgba(255,255,255,.10);
      color: #f8fafc;
      font-size:.8rem;
      padding: .32rem .64rem;
      border:1px solid rgba(255,255,255,.10);
    }

    .trust-strip{
      display:grid;
      grid-template-columns: repeat(4, minmax(0, 1fr));
      gap: .9rem;
    }
    .trust-item{
      display:flex;
      align-items:center;
      gap:.8rem;
      padding: 1rem 1rem;
      border-radius: 22px;
      background: rgba(255,255,255,.96);
      border: 1px solid rgba(220,235,231,.98);
      box-shadow: var(--shadow);
    }

    .notice-bar{
      border: 1px solid rgba(255,122,89,.20);
      background: linear-gradient(180deg, rgba(255,244,240,.95), rgba(255,255,255,.96));
      color: #9a3412;
      border-radius: 22px;
      padding: 1rem 1.1rem;
    }

    @media (max-width: 1024px){
      .latest-grid{ grid-template-columns: 1fr; }
      .trust-strip{ grid-template-columns: repeat(2, minmax(0, 1fr)); }
      .hero-stage{ min-height: 30rem; }
    }
    @media (max-width: 768px){
      .section-pad{ padding-top: 3.8rem; padding-bottom: 3.8rem; }
      .header-top{ display:none; }
      .header-nav{ padding-top: .85rem; padding-bottom: .85rem; }
      .nav-links{ display:none; }
      .desktop-cta{ display:none; }
      .mobile-toggle{ display:inline-flex; }
      .hero-wrap{ border-radius: 28px; }
      .hero-stage{ min-height: 26rem; }
      .trust-strip{ grid-template-columns: 1fr; }
      .compare-connector{ transform: rotate(90deg); }
    }
    @media (max-width: 640px){
      .container{ width: min(100% - 1rem, 1240px); }
      .hero-title{ font-size: clamp(1.95rem, 8vw, 2.8rem); }
      .hero-desc{ font-size: .98rem; }
      .btn{ width: 100%; }
      .mobile-stack{ flex-direction: column; align-items: stretch; }
      .soft-card{ border-radius: 22px; }
      .metric-card{ padding: 1rem; }
      .faq-head, .faq-answer-inner{ padding-left: .95rem; padding-right: .95rem; }
    }

/* roulang page: article */
:root{
      --bg:#F7FBFA;
      --surface:#FFFFFF;
      --surface-2:#EAF8F5;
      --brand:#16A085;
      --brand-dark:#0F8B73;
      --accent:#FF7A59;
      --text:#111827;
      --muted:#5F6B7A;
      --line:#DCEBE7;
      --shadow:0 12px 30px rgba(16, 185, 129, .08);
      --shadow-strong:0 18px 38px rgba(16, 185, 129, .12);
      --radius:24px;
      --radius-sm:16px;
      --header-bg:rgba(247, 251, 250, .80);
    }
    html{scroll-behavior:smooth}
    body{
      margin:0;
      font-family:system-ui,-apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei","Noto Sans SC",sans-serif;
      color:var(--text);
      background:
        radial-gradient(900px 420px at 12% 0%, rgba(22,160,133,.12), transparent 60%),
        radial-gradient(700px 360px at 96% 12%, rgba(255,122,89,.10), transparent 48%),
        linear-gradient(180deg, #F8FCFB 0%, #F7FBFA 35%, #F6FAF8 100%);
      line-height:1.75;
      text-rendering:optimizeLegibility;
      -webkit-font-smoothing:antialiased;
      overflow-x:hidden;
    }
    a{
      color:inherit;
      text-decoration:none;
      transition:color .2s ease, opacity .2s ease, transform .2s ease, background-color .2s ease, border-color .2s ease, box-shadow .2s ease;
    }
    img{max-width:100%;display:block}
    button,input,select,textarea{font:inherit}
    .container{
      width:min(100% - 1.5rem, 1240px);
      margin-inline:auto;
    }
    .section-pad{
      padding-top:4.8rem;
      padding-bottom:4.8rem;
    }
    .section-title{
      font-size:clamp(1.8rem, 2.3vw, 2.5rem);
      line-height:1.18;
      letter-spacing:-0.02em;
      color:#0f172a;
    }
    .section-subtitle{
      color:var(--muted);
      font-size:1rem;
      line-height:1.8;
      max-width:54rem;
    }
    .soft-card{
      background:rgba(255,255,255,.96);
      border:1px solid rgba(220,235,231,.95);
      border-radius:var(--radius);
      box-shadow:var(--shadow);
      backdrop-filter:blur(10px);
    }
    .soft-card:hover{
      border-color:rgba(22,160,133,.28);
      box-shadow:var(--shadow-strong);
      transform:translateY(-3px);
    }
    .soft-card,
    .soft-card *{
      transition:transform .22s ease, box-shadow .22s ease, border-color .22s ease, background-color .22s ease, color .22s ease, opacity .22s ease;
    }
    .badge{
      display:inline-flex;
      align-items:center;
      gap:.45rem;
      padding:.42rem .8rem;
      border-radius:999px;
      background:rgba(22,160,133,.09);
      color:var(--brand-dark);
      border:1px solid rgba(22,160,133,.18);
      font-size:.88rem;
      font-weight:600;
      letter-spacing:.01em;
    }
    .badge-soft{
      background:rgba(255,122,89,.10);
      color:#c2410c;
      border-color:rgba(255,122,89,.18);
    }
    .btn{
      display:inline-flex;
      align-items:center;
      justify-content:center;
      gap:.55rem;
      min-height:46px;
      padding:.8rem 1.2rem;
      border-radius:16px;
      border:1px solid transparent;
      font-weight:700;
      letter-spacing:.01em;
      cursor:pointer;
      user-select:none;
      white-space:nowrap;
      outline:none;
    }
    .btn-primary{
      background:linear-gradient(135deg, var(--brand) 0%, #18b08e 100%);
      color:#fff;
      box-shadow:0 12px 24px rgba(22,160,133,.18);
    }
    .btn-primary:hover{
      transform:translateY(-2px);
      background:linear-gradient(135deg, var(--brand-dark) 0%, #16997e 100%);
      box-shadow:0 16px 28px rgba(22,160,133,.24);
    }
    .btn-secondary{
      background:rgba(255,255,255,.9);
      color:var(--brand-dark);
      border-color:rgba(22,160,133,.18);
      box-shadow:0 8px 18px rgba(16,24,40,.04);
    }
    .btn-secondary:hover{
      transform:translateY(-2px);
      border-color:rgba(22,160,133,.35);
      background:rgba(234,248,245,.88);
    }
    .btn-ghost{
      background:transparent;
      color:var(--text);
      border-color:rgba(220,235,231,.95);
    }
    .btn-ghost:hover{
      background:rgba(234,248,245,.7);
      border-color:rgba(22,160,133,.20);
    }
    .focus-ring:focus-visible,
    .btn:focus-visible,
    a:focus-visible,
    input:focus-visible,
    select:focus-visible,
    textarea:focus-visible{
      outline:none;
      box-shadow:0 0 0 4px rgba(22,160,133,.14);
      border-color:rgba(22,160,133,.55) !important;
    }
    .site-header{
      position:fixed;
      inset:0 0 auto 0;
      z-index:60;
      background:var(--header-bg);
      backdrop-filter:blur(18px);
      border-bottom:1px solid transparent;
      transition:background-color .25s ease, box-shadow .25s ease, border-color .25s ease, transform .25s ease;
    }
    .site-header.is-scrolled{
      background:rgba(255,255,255,.95);
      border-bottom-color:rgba(220,235,231,.9);
      box-shadow:0 14px 34px rgba(16,24,40,.08);
    }
    .header-top{
      display:flex;
      align-items:center;
      justify-content:space-between;
      gap:1rem;
      padding:.95rem 0 .7rem;
      overflow:hidden;
      max-height:88px;
      transition:max-height .25s ease, opacity .25s ease, padding .25s ease;
    }
    .site-header.is-scrolled .header-top{
      max-height:0;
      opacity:0;
      padding:0;
    }
    .header-nav{
      display:flex;
      align-items:center;
      justify-content:space-between;
      gap:1rem;
      padding:.72rem 0 .95rem;
      transition:padding .25s ease;
    }
    .site-header.is-scrolled .header-nav{
      padding-top:.82rem;
      padding-bottom:.82rem;
    }
    .nav-links{
      display:flex;
      align-items:center;
      gap:.25rem;
      flex-wrap:wrap;
    }
    .nav-link{
      padding:.72rem .9rem;
      border-radius:999px;
      color:#334155;
      font-weight:600;
      font-size:.95rem;
    }
    .nav-link:hover{
      background:rgba(22,160,133,.09);
      color:var(--brand-dark);
    }
    .nav-link.is-active{
      background:rgba(22,160,133,.12);
      color:var(--brand-dark);
      border:1px solid rgba(22,160,133,.16);
    }
    .logo-mark{
      width:2.5rem;
      height:2.5rem;
      border-radius:16px;
      background:linear-gradient(135deg, rgba(22,160,133,1), rgba(24,176,142,1));
      display:grid;
      place-items:center;
      box-shadow:0 10px 24px rgba(22,160,133,.20);
      color:#fff;
      flex-shrink:0;
    }
    .brand-pill{
      display:inline-flex;
      align-items:center;
      gap:.75rem;
      padding:.5rem .8rem .5rem .55rem;
      border-radius:999px;
      background:rgba(255,255,255,.74);
      border:1px solid rgba(220,235,231,.98);
      box-shadow:0 8px 20px rgba(16,24,40,.05);
      backdrop-filter:blur(12px);
    }
    .brand-pill:hover{
      transform:translateY(-2px);
      border-color:rgba(22,160,133,.22);
      box-shadow:0 12px 24px rgba(16,24,40,.07);
    }
    .brand-name{
      display:block;
      font-weight:800;
      font-size:1rem;
      line-height:1.2;
      color:#0f172a;
    }
    .brand-sub{
      display:block;
      margin-top:.15rem;
      font-size:.82rem;
      color:var(--muted);
      line-height:1.2;
    }
    .header-note{
      display:inline-flex;
      align-items:center;
      gap:.55rem;
      padding:.7rem .9rem;
      border-radius:999px;
      background:rgba(255,255,255,.68);
      border:1px solid rgba(220,235,231,.96);
      color:#475569;
      font-size:.92rem;
      box-shadow:0 8px 18px rgba(16,24,40,.04);
    }
    .mobile-toggle{
      display:inline-flex;
      align-items:center;
      justify-content:center;
      width:46px;
      height:46px;
      border-radius:16px;
      border:1px solid rgba(220,235,231,.98);
      background:rgba(255,255,255,.9);
      color:#0f172a;
      box-shadow:0 8px 18px rgba(16,24,40,.05);
    }
    .mobile-toggle:hover{
      transform:translateY(-1px);
      border-color:rgba(22,160,133,.22);
      background:rgba(234,248,245,.88);
    }
    .mobile-menu{
      max-height:0;
      overflow:hidden;
      transition:max-height .28s ease;
    }
    .mobile-menu.is-open{
      max-height:420px;
    }
    .mobile-menu-panel{
      padding:0 0 1rem;
    }
    .mobile-menu-panel .soft-card{
      border-radius:22px;
    }
    .mobile-link{
      display:flex;
      align-items:center;
      justify-content:space-between;
      padding:1rem 1rem;
      border-radius:14px;
      color:#334155;
      font-weight:650;
      background:rgba(248,252,251,.9);
      border:1px solid rgba(220,235,231,.86);
    }
    .mobile-link:hover{
      background:rgba(234,248,245,.92);
      color:var(--brand-dark);
      border-color:rgba(22,160,133,.22);
    }
    .article-hero{
      position:relative;
      overflow:hidden;
    }
    .article-hero::before{
      content:"";
      position:absolute;
      inset:-2rem -10% auto auto;
      width:18rem;
      height:18rem;
      border-radius:999px;
      background:radial-gradient(circle at center, rgba(22,160,133,.15), rgba(22,160,133,0) 68%);
      pointer-events:none;
    }
    .article-hero::after{
      content:"";
      position:absolute;
      inset:auto auto -4rem -6rem;
      width:16rem;
      height:16rem;
      border-radius:999px;
      background:radial-gradient(circle at center, rgba(255,122,89,.12), rgba(255,122,89,0) 68%);
      pointer-events:none;
    }
    .article-meta{
      display:flex;
      flex-wrap:wrap;
      gap:.65rem;
      align-items:center;
    }
    .meta-chip{
      display:inline-flex;
      align-items:center;
      gap:.4rem;
      padding:.48rem .75rem;
      border-radius:999px;
      background:rgba(234,248,245,.96);
      color:#0f766e;
      border:1px solid rgba(22,160,133,.14);
      font-size:.88rem;
      font-weight:600;
    }
    .article-title{
      font-size:clamp(2rem, 4vw, 3.45rem);
      line-height:1.12;
      letter-spacing:-.03em;
      color:#0f172a;
      font-weight:900;
      max-width:14ch;
    }
    .article-lead{
      color:var(--muted);
      font-size:1.02rem;
      line-height:1.88;
      max-width:52rem;
    }
    .breadcrumb{
      display:flex;
      align-items:center;
      flex-wrap:wrap;
      gap:.55rem;
      color:#64748b;
      font-size:.92rem;
    }
    .breadcrumb a{
      color:#475569;
      padding:.3rem .55rem;
      border-radius:999px;
      background:rgba(255,255,255,.78);
      border:1px solid rgba(220,235,231,.85);
    }
    .breadcrumb a:hover{
      color:var(--brand-dark);
      border-color:rgba(22,160,133,.22);
      background:rgba(234,248,245,.95);
    }
    .breadcrumb span.sep{
      color:#94a3b8;
    }
    .article-shell{
      display:grid;
      grid-template-columns:minmax(0,1fr) 320px;
      gap:1.5rem;
      align-items:start;
    }
    .article-content{
      padding:1.25rem 1.25rem 1.4rem;
      color:#1f2937;
    }
    .article-content > * + *{margin-top:1rem}
    .article-content h2,
    .article-content h3,
    .article-content h4{
      color:#0f172a;
      line-height:1.25;
      letter-spacing:-.02em;
      font-weight:800;
      margin-top:2rem;
    }
    .article-content h2{
      font-size:clamp(1.35rem, 2.2vw, 1.9rem);
      padding-left:1rem;
      border-left:4px solid var(--brand);
    }
    .article-content h3{
      font-size:clamp(1.15rem, 1.6vw, 1.35rem);
    }
    .article-content p{
      font-size:1rem;
      line-height:1.85;
      color:#334155;
      margin:0;
    }
    .article-content ul,
    .article-content ol{
      padding-left:1.25rem;
      color:#334155;
    }
    .article-content li + li{margin-top:.5rem}
    .article-content a{
      color:var(--brand-dark);
      text-decoration:underline;
      text-underline-offset:3px;
      text-decoration-thickness:2px;
    }
    .article-content a:hover{
      color:#0f766e;
    }
    .article-content blockquote{
      margin:1.25rem 0;
      padding:1rem 1rem 1rem 1.1rem;
      background:rgba(234,248,245,.92);
      border-left:4px solid var(--brand);
      border-radius:18px;
      color:#0f172a;
    }
    .article-content figure{
      margin:1.4rem 0;
      text-align:center;
    }
    .article-content img{
      border-radius:18px;
      box-shadow:0 14px 28px rgba(16,24,40,.08);
      margin:0 auto;
    }
    .article-content figcaption{
      margin-top:.55rem;
      font-size:.88rem;
      color:#64748b;
    }
    .article-content hr{
      border:0;
      border-top:1px solid rgba(220,235,231,.95);
      margin:1.4rem 0;
    }
    .article-content code{
      padding:.15rem .38rem;
      border-radius:8px;
      background:#effaf6;
      color:#0f766e;
      font-size:.94em;
    }
    .article-content pre{
      overflow:auto;
      padding:1rem 1.1rem;
      border-radius:18px;
      background:#0f172a;
      color:#e2e8f0;
    }
    .side-card{
      padding:1.1rem;
    }
    .side-title{
      font-size:1rem;
      font-weight:800;
      color:#0f172a;
      margin-bottom:.8rem;
    }
    .toc-list{
      display:grid;
      gap:.5rem;
    }
    .toc-link{
      display:flex;
      align-items:center;
      gap:.6rem;
      padding:.72rem .82rem;
      border-radius:14px;
      border:1px solid rgba(220,235,231,.9);
      background:rgba(248,252,251,.92);
      color:#334155;
      font-size:.94rem;
      line-height:1.45;
    }
    .toc-link:hover{
      background:rgba(234,248,245,.95);
      border-color:rgba(22,160,133,.22);
      color:var(--brand-dark);
      transform:translateY(-1px);
    }
    .toc-dot{
      width:.55rem;
      height:.55rem;
      border-radius:999px;
      background:var(--brand);
      flex-shrink:0;
      box-shadow:0 0 0 4px rgba(22,160,133,.1);
    }
    .side-note{
      color:#475569;
      font-size:.94rem;
      line-height:1.8;
    }
    .simple-list{
      display:grid;
      gap:.55rem;
    }
    .simple-list a{
      display:block;
      padding:.8rem .9rem;
      border-radius:14px;
      border:1px solid rgba(220,235,231,.9);
      background:#fff;
      color:#334155;
      font-weight:600;
    }
    .simple-list a:hover{
      border-color:rgba(22,160,133,.24);
      background:rgba(234,248,245,.88);
      color:var(--brand-dark);
    }
    .empty-state{
      padding:2rem 1.25rem;
      text-align:center;
    }
    .empty-icon{
      width:4rem;
      height:4rem;
      margin:0 auto 1rem;
      border-radius:18px;
      background:linear-gradient(135deg, rgba(22,160,133,.12), rgba(255,122,89,.12));
      display:grid;
      place-items:center;
      color:var(--brand-dark);
    }
    .footer{
      background:linear-gradient(180deg, rgba(234,248,245,.8), rgba(241,248,246,.95));
      border-top:1px solid rgba(220,235,231,.96);
    }
    .footer-link{
      display:inline-flex;
      color:#475569;
      padding:.25rem 0;
      font-weight:600;
    }
    .footer-link:hover{
      color:var(--brand-dark);
    }
    .footer .badge{
      background:rgba(255,255,255,.72);
    }
    .lift-hover:hover{
      transform:translateY(-3px);
      box-shadow:var(--shadow-strong);
      border-color:rgba(22,160,133,.26);
    }
    .card-soft{
      background:rgba(255,255,255,.96);
      border:1px solid rgba(220,235,231,.95);
      box-shadow:var(--shadow);
      border-radius:var(--radius);
    }
    .card-soft:hover{
      box-shadow:var(--shadow-strong);
    }
    .page-seal{
      display:inline-flex;
      align-items:center;
      gap:.45rem;
      padding:.52rem .75rem;
      border-radius:999px;
      border:1px solid rgba(22,160,133,.18);
      background:rgba(234,248,245,.92);
      color:#0f766e;
      font-size:.85rem;
      font-weight:700;
    }
    .divider{
      height:1px;
      background:linear-gradient(90deg, rgba(220,235,231,0), rgba(220,235,231,1), rgba(220,235,231,0));
    }
    @media (max-width: 1024px){
      .article-shell{
        grid-template-columns:minmax(0,1fr);
      }
    }
    @media (max-width: 768px){
      .section-pad{padding-top:3.8rem;padding-bottom:3.8rem}
      .article-title{max-width:100%}
      .header-top{
        gap:.75rem;
      }
      .brand-sub{
        max-width:12rem;
      }
    }
    @media (max-width: 640px){
      .container{width:min(100% - 1rem, 1240px)}
      .header-top{
        align-items:flex-start;
      }
      .nav-links{
        gap:.18rem;
      }
      .nav-link{
        padding:.62rem .78rem;
      }
      .article-content{
        padding:1rem;
      }
      .side-card{
        padding:1rem;
      }
      .btn{
        min-height:44px;
        width:100%;
      }
      .mobile-menu-panel .btn{
        width:100%;
      }
    }