/* roulang page: index */
:root{
      --ink:#181512;
      --ink-2:#24201c;
      --ink-3:#3b332d;
      --muted:#7c7068;
      --soft:#a89c91;
      --paper:#f8f3ec;
      --paper-2:#efe4d6;
      --paper-3:#fffdf9;
      --line:rgba(76,60,45,.12);
      --line-dark:rgba(255,255,255,.10);
      --coral:#ff6b4a;
      --coral-2:#f05f42;
      --coral-soft:rgba(255,107,74,.12);
      --sage:#758467;
      --sage-soft:rgba(117,132,103,.14);
      --radius-xl:28px;
      --radius-lg:22px;
      --radius-md:16px;
      --shadow:0 18px 50px rgba(56,42,32,.10);
      --shadow-strong:0 24px 70px rgba(56,42,32,.16);
      --sidebar:272px;
      --font:-apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei","Noto Sans SC",Arial,sans-serif;
    }

    *{box-sizing:border-box}
    html{scroll-behavior:smooth}
    body{
      margin:0;
      font-family:var(--font);
      color:var(--ink-3);
      background:
        radial-gradient(circle at 82% 6%, rgba(255,107,74,.10), transparent 28%),
        radial-gradient(circle at 18% 18%, rgba(117,132,103,.10), transparent 30%),
        var(--paper);
      line-height:1.75;
      overflow-x:hidden;
    }
    a{color:inherit;text-decoration:none;transition:.22s ease}
    a:hover{color:var(--coral)}
    img{max-width:100%;height:auto}
    button,input,textarea,select{font-family:inherit}
    ::selection{background:var(--coral);color:#fff}

    .app-shell{min-height:100vh}
    .sidebar{
      position:fixed;
      inset:0 auto 0 0;
      width:var(--sidebar);
      z-index:1040;
      background:
        linear-gradient(180deg, rgba(255,255,255,.035), transparent 28%),
        var(--ink);
      color:#f7eee4;
      border-right:1px solid var(--line-dark);
      padding:24px 18px;
      display:flex;
      flex-direction:column;
      box-shadow:12px 0 40px rgba(18,15,12,.18);
    }
    .brand-mark{
      display:flex;
      gap:12px;
      align-items:center;
      padding:10px 10px 22px;
      border-bottom:1px solid var(--line-dark);
    }
    .brand-icon{
      width:42px;height:42px;border-radius:16px;
      background:linear-gradient(135deg,var(--coral),#f3b086);
      display:grid;place-items:center;
      box-shadow:0 12px 28px rgba(255,107,74,.28);
      color:#fff;font-weight:800;
      flex:0 0 auto;
    }
    .brand-title{font-weight:800;font-size:15px;line-height:1.35;letter-spacing:.01em}
    .brand-sub{font-size:12px;color:#bdb1a7;margin-top:3px}
    .side-nav{padding:22px 0;display:grid;gap:8px}
    .side-link{
      display:flex;align-items:center;gap:12px;
      padding:13px 14px;
      border-radius:16px;
      color:#d9cec5;
      font-weight:650;
      font-size:14px;
      position:relative;
    }
    .side-link .nav-symbol{
      width:24px;height:24px;border-radius:10px;
      display:grid;place-items:center;
      background:rgba(255,255,255,.06);
      color:#e6d8cc;
      font-size:13px;
    }
    .side-link:hover{background:rgba(255,255,255,.075);color:#fff;transform:translateX(2px)}
    .side-link.active{
      background:rgba(255,107,74,.13);
      color:#fff;
      box-shadow:inset 4px 0 0 var(--coral);
    }
    .sidebar-guide{
      margin-top:8px;
      padding:16px;
      border:1px solid var(--line-dark);
      border-radius:20px;
      background:rgba(255,255,255,.045);
    }
    .sidebar-guide strong{display:block;color:#fff;font-size:13px;margin-bottom:10px}
    .guide-link{
      display:block;
      color:#bfb2a8;
      font-size:13px;
      padding:6px 0;
    }
    .guide-link:hover{color:var(--coral)}
    .side-cta{
      margin-top:auto;
      border:1px solid rgba(255,107,74,.28);
      border-radius:22px;
      padding:18px;
      background:linear-gradient(145deg,rgba(255,107,74,.14),rgba(255,255,255,.04));
    }
    .side-cta p{font-size:13px;color:#d8ccc2;margin:0 0 14px}

    .main-panel{
      margin-left:var(--sidebar);
      min-height:100vh;
    }
    .content-wrap{
      width:min(100%,1280px);
      margin:0 auto;
      padding:0 42px;
    }

    .mobile-topbar{
      display:none;
      position:sticky;top:0;z-index:1030;
      background:rgba(24,21,18,.94);
      backdrop-filter:blur(14px);
      border-bottom:1px solid var(--line-dark);
      color:#fff;
      padding:12px 16px;
    }
    .mobile-brand{font-weight:800;font-size:14px;line-height:1.35}
    .menu-btn{
      width:44px;height:44px;border-radius:14px;border:1px solid rgba(255,255,255,.14);
      background:rgba(255,255,255,.06);color:#fff;
    }
    .offcanvas{
      background:var(--ink);
      color:#fff;
    }
    .offcanvas .btn-close{filter:invert(1);opacity:.8}

    .btn-brand{
      border:0;
      background:var(--coral);
      color:#fff !important;
      border-radius:999px;
      padding:12px 22px;
      font-weight:750;
      min-height:46px;
      box-shadow:0 14px 30px rgba(255,107,74,.24);
      display:inline-flex;align-items:center;justify-content:center;gap:8px;
      transition:.22s ease;
    }
    .btn-brand:hover,.btn-brand:focus{
      background:var(--coral-2);
      transform:translateY(-2px);
      box-shadow:0 18px 38px rgba(255,107,74,.32);
      color:#fff !important;
    }
    .btn-ghost{
      border:1px solid rgba(76,60,45,.18);
      background:rgba(255,253,249,.72);
      color:var(--ink) !important;
      border-radius:999px;
      padding:12px 22px;
      font-weight:750;
      min-height:46px;
      display:inline-flex;align-items:center;justify-content:center;gap:8px;
      transition:.22s ease;
    }
    .btn-ghost:hover,.btn-ghost:focus{
      border-color:rgba(255,107,74,.55);
      background:var(--coral-soft);
      transform:translateY(-2px);
    }

    .section{padding:88px 0}
    .section-sm{padding:68px 0}
    .section-head{margin-bottom:34px}
    .eyebrow{
      display:inline-flex;align-items:center;gap:8px;
      padding:7px 12px;
      border-radius:999px;
      background:var(--coral-soft);
      color:#9d3d28;
      font-size:13px;
      font-weight:750;
      margin-bottom:14px;
    }
    .eyebrow::before{
      content:"";
      width:7px;height:7px;border-radius:50%;background:var(--coral);
    }
    h1,h2,h3,h4{color:var(--ink);letter-spacing:-.02em}
    h1{
      font-size:clamp(32px,4.4vw,56px);
      line-height:1.14;
      font-weight:850;
      margin:0 0 22px;
    }
    h2{
      font-size:clamp(28px,3vw,38px);
      line-height:1.25;
      font-weight:820;
      margin:0 0 14px;
    }
    h3{font-size:22px;line-height:1.35;font-weight:780}
    .lead-text{
      font-size:17px;
      color:var(--muted);
      line-height:1.9;
      max-width:760px;
    }

    .hero-product{
      position:relative;
      padding:78px 0 54px;
      overflow:hidden;
    }
    .hero-product::before{
      content:"";
      position:absolute;
      right:-120px;top:40px;
      width:420px;height:420px;border-radius:50%;
      background:radial-gradient(circle,rgba(255,107,74,.16),transparent 66%);
      pointer-events:none;
    }
    .hero-copy{padding-top:34px}
    .hero-actions{display:flex;gap:14px;flex-wrap:wrap;margin-top:30px}
    .hero-note{
      display:flex;gap:12px;align-items:flex-start;
      margin-top:26px;
      padding:16px 18px;
      background:rgba(255,253,249,.72);
      border:1px solid var(--line);
      border-radius:20px;
      max-width:660px;
    }
    .note-dot{
      width:28px;height:28px;border-radius:12px;
      background:var(--sage-soft);color:var(--sage);
      display:grid;place-items:center;flex:0 0 auto;font-weight:800;
    }

    .product-board{
      position:relative;
      border-radius:32px;
      background:linear-gradient(145deg,#211d19,#14110f);
      border:1px solid rgba(255,255,255,.12);
      box-shadow:var(--shadow-strong);
      padding:18px;
      overflow:hidden;
    }
    .product-board::after{
      content:"";
      position:absolute;inset:auto -80px -90px auto;
      width:240px;height:240px;border-radius:50%;
      background:rgba(255,107,74,.20);
      filter:blur(18px);
    }
    .board-top{
      display:flex;justify-content:space-between;align-items:center;
      color:#efe4d6;font-size:13px;padding:8px 8px 18px;position:relative;z-index:1;
    }
    .window-dots{display:flex;gap:7px}
    .window-dots span{width:9px;height:9px;border-radius:50%;background:#6f6258}
    .window-dots span:nth-child(1){background:var(--coral)}
    .window-dots span:nth-child(2){background:#e6b86b}
    .window-dots span:nth-child(3){background:var(--sage)}
    .board-grid{
      display:grid;
      grid-template-columns:1.05fr .95fr;
      gap:14px;
      position:relative;z-index:1;
    }
    .board-card{
      background:rgba(255,253,249,.94);
      border:1px solid rgba(255,255,255,.12);
      border-radius:22px;
      padding:18px;
      min-height:140px;
    }
    .board-card.dark{
      background:rgba(255,255,255,.07);
      color:#f8f3ec;
    }
    .board-card h4{font-size:15px;font-weight:800;margin:0 0 12px;color:inherit}
    .status-row{
      display:flex;justify-content:space-between;gap:12px;
      padding:10px 0;border-bottom:1px solid rgba(76,60,45,.10);
      font-size:13px;color:var(--muted);
    }
    .status-row:last-child{border-bottom:0}
    .bar{
      height:9px;border-radius:999px;background:rgba(255,255,255,.12);
      overflow:hidden;margin:13px 0;
    }
    .bar span{display:block;height:100%;border-radius:999px;background:linear-gradient(90deg,var(--coral),#f2b184)}
    .cover-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:10px;margin-top:8px}
    .cover{
      aspect-ratio:1/1.16;border-radius:16px;
      background:
        linear-gradient(135deg,rgba(255,107,74,.50),rgba(239,228,214,.18)),
        repeating-linear-gradient(90deg,rgba(255,255,255,.14) 0 4px,transparent 4px 11px);
      border:1px solid rgba(255,255,255,.10);
    }
    .tag-cloud{display:flex;gap:8px;flex-wrap:wrap}
    .tag,.badge-soft{
      display:inline-flex;align-items:center;
      border-radius:999px;
      padding:6px 10px;
      font-size:12px;
      font-weight:750;
      background:rgba(239,228,214,.76);
      color:#6d5b4e;
    }
    .tag.coral{background:var(--coral-soft);color:#a6402a}
    .tag.sage{background:var(--sage-soft);color:#536246}
    .board-metric{
      display:grid;grid-template-columns:repeat(2,1fr);gap:10px;margin-top:12px;
    }
    .mini-metric{
      border-radius:16px;padding:12px;background:rgba(255,255,255,.08);
      color:#f7eee4;
    }
    .mini-metric b{font-size:22px;display:block;color:#fff}
    .mini-metric span{font-size:12px;color:#cabdb2}

    .trust-strip{
      margin-top:32px;
      display:grid;
      grid-template-columns:repeat(4,1fr);
      gap:14px;
    }
    .trust-item{
      background:rgba(255,253,249,.75);
      border:1px solid var(--line);
      border-radius:999px;
      padding:14px 18px;
      display:flex;align-items:center;gap:12px;
      box-shadow:0 12px 34px rgba(56,42,32,.06);
    }
    .trust-num{
      color:var(--coral);
      font-size:22px;
      font-weight:850;
      line-height:1;
      white-space:nowrap;
    }
    .trust-item p{margin:0;color:var(--muted);font-size:13px;line-height:1.45}

    .capability-layout{
      display:grid;
      grid-template-columns:330px 1fr;
      gap:22px;
      align-items:start;
    }
    .capability-tabs{
      background:var(--ink-2);
      border-radius:var(--radius-xl);
      padding:18px;
      position:sticky;
      top:26px;
      box-shadow:var(--shadow);
    }
    .capability-tabs a{
      display:flex;justify-content:space-between;align-items:center;
      padding:14px 16px;
      color:#dccfc4;
      border-radius:16px;
      margin-bottom:8px;
      font-weight:700;
      font-size:14px;
    }
    .capability-tabs a:hover,.capability-tabs a.active{
      background:rgba(255,107,74,.14);
      color:#fff;
    }
    .feature-grid{
      display:grid;
      grid-template-columns:repeat(2,1fr);
      gap:18px;
    }
    .feature-card,.scenario-card,.case-card,.price-card,.news-card,.faq-wrap,.contact-card{
      background:var(--paper-3);
      border:1px solid var(--line);
      border-radius:var(--radius-xl);
      box-shadow:var(--shadow);
      transition:.24s ease;
    }
    .feature-card:hover,.scenario-card:hover,.case-card:hover,.price-card:hover,.news-card:hover{
      transform:translateY(-4px);
      box-shadow:var(--shadow-strong);
      border-color:rgba(255,107,74,.28);
    }
    .feature-card{padding:26px;min-height:238px}
    .feature-icon{
      width:48px;height:48px;border-radius:18px;
      background:var(--coral-soft);
      color:var(--coral);
      display:grid;place-items:center;
      font-weight:900;
      margin-bottom:18px;
    }
    .feature-card p{color:var(--muted);margin-bottom:18px}
    .feature-tags{display:flex;gap:8px;flex-wrap:wrap}

    .scenario-zone{
      background:linear-gradient(180deg,rgba(239,228,214,.64),rgba(248,243,236,.2));
      border-top:1px solid var(--line);
      border-bottom:1px solid var(--line);
    }
    .scenario-grid{
      display:grid;
      grid-template-columns:1.1fr .9fr 1fr;
      gap:18px;
    }
    .scenario-card{padding:0;overflow:hidden}
    .scenario-card.wide{grid-column:span 2}
    .scenario-art{
      height:150px;
      background:
        radial-gradient(circle at 18% 20%,rgba(255,107,74,.38),transparent 30%),
        radial-gradient(circle at 80% 72%,rgba(117,132,103,.24),transparent 30%),
        repeating-linear-gradient(90deg,rgba(24,21,18,.08) 0 8px,transparent 8px 18px),
        #eadfce;
      border-bottom:1px solid var(--line);
    }
    .scenario-body{padding:24px}
    .scenario-body p{color:var(--muted);margin-bottom:14px}
    .inline-link{
      color:#825241;
      font-weight:800;
      display:inline-flex;
      align-items:center;
      gap:6px;
    }
    .inline-link:hover{color:var(--coral);text-decoration:underline;text-underline-offset:4px}

    .case-grid{display:grid;grid-template-columns:1fr 1fr;gap:20px}
    .case-card{padding:28px}
    .case-steps{
      display:grid;gap:12px;margin:20px 0;
    }
    .case-step{
      display:grid;
      grid-template-columns:86px 1fr;
      gap:14px;
      align-items:start;
      padding:14px;
      background:rgba(248,243,236,.72);
      border:1px solid var(--line);
      border-radius:18px;
    }
    .case-step b{color:var(--coral);font-size:13px}
    .case-step p{margin:0;color:var(--muted);font-size:14px}
    .case-metrics{
      display:grid;grid-template-columns:repeat(3,1fr);gap:10px;
    }
    .case-metric{
      padding:14px;border-radius:18px;background:var(--sage-soft);
      color:#4f6042;
    }
    .case-metric strong{display:block;font-size:22px;color:#405035}

    .price-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px;align-items:stretch}
    .price-card{padding:28px;position:relative;display:flex;flex-direction:column}
    .price-card.recommend{
      border-color:rgba(255,107,74,.54);
      box-shadow:0 22px 64px rgba(255,107,74,.14);
    }
    .corner-badge{
      position:absolute;right:22px;top:22px;
      background:var(--coral);
      color:#fff;
      border-radius:999px;
      padding:6px 10px;
      font-size:12px;
      font-weight:800;
    }
    .price-name{font-size:21px;font-weight:850;color:var(--ink);margin-bottom:8px}
    .price-value{font-size:28px;font-weight:850;color:var(--ink);margin:14px 0}
    .price-card ul{padding:0;margin:18px 0 24px;list-style:none;display:grid;gap:11px}
    .price-card li{
      position:relative;
      padding-left:24px;
      color:var(--muted);
      font-size:15px;
    }
    .price-card li::before{
      content:"";
      position:absolute;left:0;top:9px;
      width:9px;height:9px;border-radius:50%;
      background:var(--sage);
    }
    .price-card .btn-brand,.price-card .btn-ghost{margin-top:auto}

    .news-section{
      background:linear-gradient(180deg,rgba(24,21,18,.96),rgba(36,32,28,.96));
      color:#eadfd4;
      position:relative;
      overflow:hidden;
    }
    .news-section::before{
      content:"";
      position:absolute;inset:0;
      background:
        repeating-linear-gradient(90deg,rgba(255,255,255,.035) 0 6px,transparent 6px 18px);
      opacity:.45;
      pointer-events:none;
    }
    .news-section .content-wrap{position:relative;z-index:1}
    .news-section h2{color:#fff}
    .news-section .lead-text{color:#c7bbb0}
    .news-layout{
      display:grid;
      grid-template-columns:.92fr 1.08fr;
      gap:24px;
      align-items:start;
    }
    .update-panel{
      border:1px solid var(--line-dark);
      background:rgba(255,255,255,.055);
      border-radius:var(--radius-xl);
      padding:28px;
      position:sticky;top:24px;
    }
    .timeline-list{display:grid;gap:14px}
    .news-card{
      background:rgba(255,253,249,.96);
      color:var(--ink-3);
      padding:22px;
      position:relative;
    }
    .news-card::before{
      content:"";
      position:absolute;left:-10px;top:30px;
      width:16px;height:16px;border-radius:50%;
      background:var(--coral);
      box-shadow:0 0 0 6px rgba(255,107,74,.14);
    }
    .news-meta{
      display:flex;gap:10px;flex-wrap:wrap;align-items:center;
      font-size:13px;color:var(--muted);
      margin-bottom:10px;
    }
    .news-card h3{font-size:20px;margin-bottom:8px}
    .news-card p{color:var(--muted);margin-bottom:14px}
    .empty-state{
      background:rgba(255,253,249,.96);
      color:var(--ink-3);
      border:1px dashed rgba(255,107,74,.42);
      border-radius:var(--radius-xl);
      padding:34px;
      text-align:center;
    }
    .empty-icon{
      width:58px;height:58px;border-radius:22px;
      background:var(--coral-soft);
      color:var(--coral);
      display:grid;place-items:center;
      font-size:24px;font-weight:900;
      margin:0 auto 16px;
    }

    .faq-wrap{padding:18px;background:rgba(255,253,249,.78)}
    .accordion-item{
      background:transparent;
      border:0;
      border-bottom:1px solid var(--line);
    }
    .accordion-item:last-child{border-bottom:0}
    .accordion-button{
      background:transparent !important;
      color:var(--ink) !important;
      font-weight:800;
      box-shadow:none !important;
      padding:20px 18px;
      border-radius:18px !important;
    }
    .accordion-button:focus{box-shadow:0 0 0 4px rgba(255,107,74,.14) !important}
    .accordion-button:not(.collapsed){
      color:var(--ink) !important;
    }
    .accordion-button:not(.collapsed)::before{
      content:"";
      width:5px;height:24px;border-radius:999px;background:var(--coral);
      margin-right:12px;
    }
    .accordion-body{
      color:var(--muted);
      padding:0 18px 22px 35px;
      line-height:1.85;
    }

    .contact-zone{
      background:linear-gradient(135deg,var(--ink),#2f241d);
      border-radius:36px;
      padding:42px;
      color:#f8f3ec;
      position:relative;
      overflow:hidden;
      box-shadow:var(--shadow-strong);
    }
    .contact-zone::after{
      content:"";
      position:absolute;right:-90px;bottom:-120px;
      width:360px;height:360px;border-radius:50%;
      background:rgba(255,107,74,.18);
      filter:blur(10px);
    }
    .contact-zone h2{color:#fff}
    .contact-zone p{color:#d2c5ba}
    .contact-form{
      position:relative;z-index:1;
      background:rgba(255,255,255,.08);
      border:1px solid var(--line-dark);
      border-radius:26px;
      padding:22px;
    }
    .form-label{font-weight:750;color:#f4e9df;font-size:14px}
    .form-control,.form-select{
      border-radius:14px;
      border:1px solid rgba(255,255,255,.14);
      background:rgba(255,253,249,.95);
      color:var(--ink);
      min-height:46px;
    }
    .form-control:focus,.form-select:focus{
      border-color:var(--coral);
      box-shadow:0 0 0 4px rgba(255,107,74,.18);
    }
    .privacy-note{
      font-size:13px;color:#cdbfb5;
      margin-top:12px;
    }

    .site-footer{
      background:var(--ink);
      color:#c8bbb0;
      border-top:1px solid var(--line-dark);
      padding:48px 0 28px;
    }
    .footer-brand{color:#fff;font-weight:850;font-size:18px;margin-bottom:12px}
    .footer-desc{max-width:520px;color:#afa298}
    .footer-links{display:flex;gap:18px;flex-wrap:wrap;justify-content:flex-end}
    .footer-links a{color:#c8bbb0;font-size:14px}
    .footer-links a:hover{color:var(--coral)}
    .copyright{
      margin-top:28px;
      padding-top:22px;
      border-top:1px solid var(--line-dark);
      color:#8f837a;
      font-size:13px;
      display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;
    }

    @media (max-width:1199px){
      :root{--sidebar:92px}
      .sidebar{width:var(--sidebar);padding:18px 12px}
      .brand-mark{justify-content:center;padding:8px 0 18px}
      .brand-title,.brand-sub,.side-link span.label,.sidebar-guide,.side-cta{display:none}
      .side-link{justify-content:center;padding:14px 10px}
      .side-link.active{box-shadow:inset 0 -3px 0 var(--coral)}
      .content-wrap{padding:0 30px}
      .hero-copy{padding-top:0}
      .board-grid{grid-template-columns:1fr}
      .trust-strip{grid-template-columns:repeat(2,1fr)}
      .capability-layout{grid-template-columns:1fr}
      .capability-tabs{position:relative;top:auto;display:grid;grid-template-columns:repeat(3,1fr)}
      .scenario-grid{grid-template-columns:1fr 1fr}
      .scenario-card.wide{grid-column:span 1}
      .news-layout{grid-template-columns:1fr}
      .update-panel{position:relative;top:auto}
    }

    @media (max-width:767px){
      .sidebar{display:none}
      .mobile-topbar{display:flex;align-items:center;justify-content:space-between}
      .main-panel{margin-left:0}
      .content-wrap{padding:0 18px}
      .section{padding:58px 0}
      .section-sm{padding:48px 0}
      .hero-product{padding:42px 0 36px}
      .hero-actions .btn-brand,.hero-actions .btn-ghost{width:100%}
      .trust-strip,.feature-grid,.scenario-grid,.case-grid,.price-grid{grid-template-columns:1fr}
      .capability-tabs{grid-template-columns:1fr}
      .case-step{grid-template-columns:1fr}
      .case-metrics{grid-template-columns:1fr}
      .news-card::before{display:none}
      .contact-zone{padding:28px 20px;border-radius:28px}
      .footer-links{justify-content:flex-start;margin-top:20px}
    }

    @media (max-width:520px){
      .product-board{padding:12px;border-radius:24px}
      .board-card{padding:15px}
      .board-metric{grid-template-columns:1fr}
      .trust-item{border-radius:22px;align-items:flex-start}
      h1{font-size:32px}
      .lead-text{font-size:16px}
    }

/* roulang page: article */
:root{
      --ink:#181512;
      --ink-2:#24201C;
      --ink-3:#332C26;
      --text:#3B332D;
      --muted:#7C7068;
      --soft:#A89C91;
      --paper:#F8F3EC;
      --paper-2:#EFE4D6;
      --card:#FFFDF9;
      --card-2:#FBF6EF;
      --line:rgba(76,60,45,.12);
      --line-strong:rgba(76,60,45,.20);
      --accent:#FF6B4A;
      --accent-deep:#E85C3E;
      --accent-soft:rgba(255,107,74,.12);
      --sage:#758467;
      --sage-soft:rgba(117,132,103,.14);
      --shadow:0 18px 50px rgba(56,42,32,.10);
      --shadow-strong:0 28px 70px rgba(56,42,32,.16);
      --radius-lg:28px;
      --radius-md:22px;
      --radius-sm:14px;
      --sidebar:264px;
      --content-max:1220px;
      --read-max:820px;
      --ease:all .24s ease;
    }

    *{box-sizing:border-box}
    html{scroll-behavior:smooth}
    body{
      margin:0;
      min-height:100vh;
      color:var(--text);
      background:
        radial-gradient(circle at 88% 4%, rgba(255,107,74,.10), transparent 28rem),
        radial-gradient(circle at 28% 18%, rgba(117,132,103,.10), transparent 24rem),
        linear-gradient(180deg,var(--paper) 0%,#F6EFE6 45%,#F9F4ED 100%);
      font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei","Noto Sans SC",Arial,sans-serif;
      font-size:16px;
      line-height:1.8;
      overflow-x:hidden;
    }
    a{
      color:inherit;
      text-decoration:none;
      transition:var(--ease);
    }
    a:hover{color:var(--accent)}
    img{max-width:100%;height:auto;display:block}
    button,input,textarea,select{font:inherit}
    ::selection{background:rgba(255,107,74,.22);color:var(--ink)}
    :focus-visible{
      outline:3px solid rgba(255,107,74,.34);
      outline-offset:3px;
      border-radius:10px;
    }

    .app-shell{
      min-height:100vh;
      display:flex;
      width:100%;
    }
    .sidebar{
      position:fixed;
      inset:0 auto 0 0;
      width:var(--sidebar);
      z-index:1040;
      background:
        linear-gradient(180deg,rgba(255,255,255,.04),rgba(255,255,255,0) 28%),
        linear-gradient(180deg,#1B1714 0%,#241F1A 58%,#17130F 100%);
      color:#F7EFE5;
      border-right:1px solid rgba(255,255,255,.08);
      box-shadow:14px 0 40px rgba(24,21,18,.14);
      padding:24px 18px;
      display:flex;
      flex-direction:column;
    }
    .brand-block{
      display:flex;
      align-items:center;
      gap:12px;
      padding:8px 8px 22px;
      border-bottom:1px solid rgba(255,255,255,.10);
      margin-bottom:18px;
    }
    .brand-mark{
      width:44px;
      height:44px;
      border-radius:16px;
      display:grid;
      place-items:center;
      flex:0 0 auto;
      color:#FFF6EF;
      font-weight:800;
      letter-spacing:.04em;
      background:
        linear-gradient(135deg,rgba(255,107,74,.94),rgba(239,180,133,.78)),
        repeating-linear-gradient(90deg,rgba(255,255,255,.22) 0 3px,transparent 3px 9px);
      box-shadow:0 14px 30px rgba(255,107,74,.22);
    }
    .brand-text{
      min-width:0;
    }
    .brand-name{
      font-size:15px;
      line-height:1.35;
      font-weight:800;
      color:#FFFDF8;
      letter-spacing:.01em;
    }
    .brand-sub{
      margin-top:3px;
      font-size:12px;
      color:rgba(255,253,249,.58);
    }
    .side-nav{
      display:flex;
      flex-direction:column;
      gap:8px;
      padding:4px 0;
    }
    .side-link{
      position:relative;
      display:flex;
      align-items:center;
      gap:12px;
      padding:13px 14px;
      border-radius:18px;
      color:rgba(255,253,249,.72);
      font-weight:650;
      border:1px solid transparent;
    }
    .side-link .nav-symbol{
      width:30px;
      height:30px;
      display:grid;
      place-items:center;
      border-radius:12px;
      background:rgba(255,255,255,.06);
      color:#FFE0D4;
      font-size:17px;
    }
    .side-link:hover{
      color:#FFFDF8;
      background:rgba(255,255,255,.06);
      border-color:rgba(255,255,255,.08);
      transform:translateX(2px);
    }
    .side-link.active{
      color:#FFFDF8;
      background:rgba(255,107,74,.14);
      border-color:rgba(255,107,74,.25);
    }
    .side-link.active::before{
      content:"";
      position:absolute;
      left:-18px;
      top:14px;
      bottom:14px;
      width:4px;
      border-radius:0 8px 8px 0;
      background:var(--accent);
      box-shadow:0 0 20px rgba(255,107,74,.5);
    }
    .side-bottom{
      margin-top:auto;
      padding-top:18px;
      border-top:1px solid rgba(255,255,255,.10);
    }
    .side-note{
      margin:0 0 14px;
      color:rgba(255,253,249,.56);
      font-size:13px;
      line-height:1.65;
    }

    .mobile-topbar{
      display:none;
      position:sticky;
      top:0;
      z-index:1030;
      background:rgba(248,243,236,.88);
      backdrop-filter:blur(18px);
      border-bottom:1px solid var(--line);
      padding:12px 16px;
    }
    .mobile-brand{
      display:flex;
      align-items:center;
      gap:10px;
      min-width:0;
      font-weight:800;
      color:var(--ink);
      line-height:1.25;
    }
    .mobile-brand .brand-mark{
      width:38px;
      height:38px;
      border-radius:14px;
      font-size:14px;
    }
    .menu-btn{
      width:44px;
      height:44px;
      border:1px solid var(--line);
      border-radius:15px;
      background:var(--card);
      color:var(--ink);
      display:grid;
      place-items:center;
      transition:var(--ease);
    }
    .menu-btn:hover{
      border-color:rgba(255,107,74,.4);
      transform:translateY(-1px);
      box-shadow:var(--shadow);
    }
    .offcanvas{
      background:#1C1713;
      color:#FFFDF8;
      border-right:1px solid rgba(255,255,255,.08);
    }
    .offcanvas-header{
      border-bottom:1px solid rgba(255,255,255,.10);
    }
    .btn-close{
      filter:invert(1) grayscale(1);
      opacity:.75;
    }

    .main-panel{
      flex:1;
      margin-left:var(--sidebar);
      min-width:0;
    }
    .content-wrap{
      width:min(100% - 64px,var(--content-max));
      margin-inline:auto;
    }
    .article-main{
      padding:42px 0 0;
    }

    .btn{
      border:0;
      font-weight:750;
      letter-spacing:.01em;
      transition:var(--ease);
    }
    .btn-brand{
      min-height:46px;
      padding:12px 22px;
      border-radius:999px;
      background:var(--accent);
      color:#FFFDF8;
      box-shadow:0 16px 34px rgba(255,107,74,.22);
    }
    .btn-brand:hover,.btn-brand:active{
      color:#FFFDF8;
      background:var(--accent-deep);
      transform:translateY(-2px);
      box-shadow:0 22px 44px rgba(255,107,74,.28);
    }
    .btn-soft{
      min-height:46px;
      padding:12px 22px;
      border-radius:999px;
      background:rgba(255,253,249,.76);
      color:var(--ink);
      border:1px solid var(--line);
    }
    .btn-soft:hover,.btn-soft:active{
      color:var(--ink);
      border-color:rgba(255,107,74,.42);
      background:rgba(255,107,74,.09);
      transform:translateY(-2px);
      box-shadow:var(--shadow);
    }
    .btn-dark-soft{
      min-height:46px;
      padding:12px 20px;
      border-radius:999px;
      color:#FFFDF8;
      background:rgba(255,255,255,.08);
      border:1px solid rgba(255,255,255,.12);
    }
    .btn-dark-soft:hover{
      color:#FFFDF8;
      background:rgba(255,107,74,.18);
      border-color:rgba(255,107,74,.36);
      transform:translateY(-2px);
    }

    .badge-pill{
      display:inline-flex;
      align-items:center;
      gap:6px;
      padding:7px 12px;
      border-radius:999px;
      font-size:13px;
      font-weight:750;
      line-height:1;
      color:var(--ink-2);
      background:var(--accent-soft);
      border:1px solid rgba(255,107,74,.20);
    }
    .badge-sage{
      background:var(--sage-soft);
      border-color:rgba(117,132,103,.22);
      color:#56634B;
    }
    .badge-muted{
      color:var(--muted);
      background:rgba(168,156,145,.13);
      border-color:rgba(168,156,145,.20);
    }

    .breadcrumb-wrap{
      margin-bottom:20px;
    }
    .breadcrumb{
      --bs-breadcrumb-divider-color:var(--soft);
      margin:0;
      font-size:14px;
      color:var(--muted);
    }
    .breadcrumb a{
      color:var(--muted);
      font-weight:650;
    }
    .breadcrumb a:hover{color:var(--accent)}
    .breadcrumb .active{
      color:var(--ink-2);
      font-weight:750;
      max-width:46vw;
      white-space:nowrap;
      overflow:hidden;
      text-overflow:ellipsis;
    }

    .article-hero{
      position:relative;
      overflow:hidden;
      border-radius:34px;
      background:
        radial-gradient(circle at 84% 18%,rgba(255,107,74,.14),transparent 22rem),
        radial-gradient(circle at 18% 86%,rgba(117,132,103,.12),transparent 20rem),
        linear-gradient(135deg,#FFFDF9 0%,#F2E6D7 100%);
      border:1px solid var(--line);
      box-shadow:var(--shadow);
      padding:42px;
      margin-bottom:30px;
    }
    .article-hero::after{
      content:"";
      position:absolute;
      right:-70px;
      top:30px;
      width:320px;
      height:220px;
      opacity:.36;
      background:
        repeating-linear-gradient(90deg,rgba(36,32,28,.16) 0 7px,transparent 7px 20px),
        linear-gradient(135deg,rgba(255,107,74,.20),transparent);
      border-radius:36px;
      transform:rotate(-10deg);
      pointer-events:none;
    }
    .article-kicker{
      display:flex;
      flex-wrap:wrap;
      align-items:center;
      gap:10px;
      margin-bottom:22px;
      position:relative;
      z-index:1;
    }
    .article-title{
      position:relative;
      z-index:1;
      max-width:900px;
      margin:0 0 18px;
      color:var(--ink);
      font-size:clamp(30px,4vw,52px);
      line-height:1.16;
      font-weight:850;
      letter-spacing:-.035em;
    }
    .article-desc{
      position:relative;
      z-index:1;
      max-width:780px;
      margin:0;
      color:var(--muted);
      font-size:17px;
      line-height:1.85;
    }
    .article-meta{
      position:relative;
      z-index:1;
      display:flex;
      flex-wrap:wrap;
      gap:12px;
      margin-top:24px;
      color:var(--muted);
      font-size:14px;
    }
    .meta-item{
      display:inline-flex;
      align-items:center;
      gap:7px;
      padding:8px 12px;
      border-radius:999px;
      background:rgba(255,253,249,.72);
      border:1px solid var(--line);
    }

    .article-layout{
      align-items:flex-start;
      gap:0;
    }
    .article-card{
      border-radius:30px;
      border:1px solid var(--line);
      background:rgba(255,253,249,.82);
      box-shadow:var(--shadow);
      padding:44px;
      overflow:hidden;
    }
    .article-body{
      max-width:var(--read-max);
      margin-inline:auto;
      color:var(--text);
      font-size:17px;
      line-height:1.85;
      word-break:break-word;
    }
    .article-body > *:first-child{margin-top:0}
    .article-body p{
      margin:0 0 1.25em;
    }
    .article-body h2{
      margin:2.25em 0 .85em;
      color:var(--ink);
      font-size:30px;
      line-height:1.28;
      font-weight:820;
      letter-spacing:-.02em;
    }
    .article-body h3{
      margin:1.85em 0 .7em;
      color:var(--ink-2);
      font-size:22px;
      line-height:1.35;
      font-weight:780;
    }
    .article-body h4{
      margin:1.5em 0 .6em;
      color:var(--ink-2);
      font-size:19px;
      font-weight:760;
    }
    .article-body a{
      color:#8D4D36;
      font-weight:720;
      text-decoration:underline;
      text-decoration-thickness:1px;
      text-underline-offset:4px;
    }
    .article-body a:hover{
      color:var(--accent);
    }
    .article-body ul,.article-body ol{
      margin:0 0 1.35em;
      padding-left:1.45em;
    }
    .article-body li{
      margin:.42em 0;
      padding-left:.2em;
    }
    .article-body blockquote{
      margin:2em 0;
      padding:22px 24px;
      border-left:5px solid var(--accent);
      border-radius:0 20px 20px 0;
      background:linear-gradient(90deg,rgba(255,107,74,.10),rgba(255,253,249,.72));
      color:var(--ink-2);
      font-weight:650;
    }
    .article-body img{
      margin:2em auto .7em;
      border-radius:20px;
      border:1px solid var(--line);
      box-shadow:0 18px 46px rgba(56,42,32,.10);
    }
    .article-body figure{
      margin:2em 0;
    }
    .article-body figcaption{
      margin-top:10px;
      color:var(--muted);
      text-align:center;
      font-size:14px;
    }
    .article-body table{
      width:100%;
      margin:2em 0;
      border-collapse:separate;
      border-spacing:0;
      overflow:hidden;
      border:1px solid var(--line);
      border-radius:18px;
      background:var(--card);
      font-size:15px;
    }
    .article-body th,.article-body td{
      padding:13px 15px;
      border-bottom:1px solid var(--line);
      vertical-align:top;
    }
    .article-body th{
      background:#EFE6DA;
      color:var(--ink);
      font-weight:760;
    }
    .article-body tr:last-child td{border-bottom:0}
    .article-body code{
      padding:.18em .45em;
      border-radius:8px;
      background:rgba(36,32,28,.07);
      color:#78402F;
      font-size:.92em;
    }
    .article-body pre{
      overflow:auto;
      padding:18px;
      border-radius:18px;
      background:#211C18;
      color:#FFF4EA;
      border:1px solid rgba(255,255,255,.08);
    }
    .article-body pre code{
      padding:0;
      background:transparent;
      color:inherit;
    }

    .not-found-box{
      max-width:var(--read-max);
      margin-inline:auto;
      text-align:center;
      padding:46px 28px;
      border-radius:26px;
      background:
        radial-gradient(circle at 50% 0,rgba(255,107,74,.10),transparent 18rem),
        var(--card-2);
      border:1px dashed rgba(255,107,74,.32);
    }
    .not-found-icon{
      width:62px;
      height:62px;
      display:grid;
      place-items:center;
      margin:0 auto 16px;
      border-radius:22px;
      background:var(--accent-soft);
      color:var(--accent-deep);
      font-size:28px;
      font-weight:800;
    }
    .not-found-box h2{
      margin:0 0 10px;
      color:var(--ink);
      font-size:28px;
      font-weight:820;
    }
    .not-found-box p{
      margin:0 auto 22px;
      max-width:540px;
      color:var(--muted);
    }

    .sticky-aside{
      position:sticky;
      top:30px;
      display:flex;
      flex-direction:column;
      gap:18px;
    }
    .aside-card{
      border-radius:24px;
      border:1px solid var(--line);
      background:rgba(255,253,249,.74);
      box-shadow:0 14px 38px rgba(56,42,32,.08);
      padding:22px;
    }
    .aside-title{
      display:flex;
      align-items:center;
      gap:9px;
      margin:0 0 14px;
      color:var(--ink);
      font-size:16px;
      font-weight:820;
    }
    .aside-title::before{
      content:"";
      width:9px;
      height:9px;
      border-radius:999px;
      background:var(--accent);
      box-shadow:0 0 0 5px rgba(255,107,74,.12);
    }
    .toc-list,.aside-links{
      list-style:none;
      padding:0;
      margin:0;
      display:flex;
      flex-direction:column;
      gap:10px;
    }
    .toc-list a,.aside-links a{
      display:flex;
      align-items:center;
      justify-content:space-between;
      gap:12px;
      padding:10px 12px;
      border-radius:14px;
      color:var(--muted);
      background:rgba(248,243,236,.56);
      border:1px solid transparent;
      font-size:14px;
      font-weight:680;
    }
    .toc-list a:hover,.aside-links a:hover{
      color:var(--ink);
      background:rgba(255,107,74,.08);
      border-color:rgba(255,107,74,.18);
      transform:translateX(2px);
    }
    .aside-note{
      margin:0;
      color:var(--muted);
      font-size:14px;
      line-height:1.7;
    }

    .recommend-section{
      padding:30px 0 0;
    }
    .section-head{
      display:flex;
      align-items:end;
      justify-content:space-between;
      gap:18px;
      margin-bottom:20px;
    }
    .section-eyebrow{
      display:inline-flex;
      align-items:center;
      gap:8px;
      margin-bottom:8px;
      color:var(--accent-deep);
      font-size:13px;
      font-weight:820;
      letter-spacing:.08em;
    }
    .section-eyebrow::before{
      content:"";
      width:26px;
      height:2px;
      border-radius:999px;
      background:var(--accent);
    }
    .section-title{
      margin:0;
      color:var(--ink);
      font-size:32px;
      line-height:1.25;
      font-weight:850;
      letter-spacing:-.02em;
    }
    .section-desc{
      max-width:620px;
      margin:8px 0 0;
      color:var(--muted);
    }
    .recommend-card{
      height:100%;
      border:1px solid var(--line);
      border-radius:24px;
      padding:24px;
      background:var(--card);
      box-shadow:0 14px 40px rgba(56,42,32,.08);
      transition:var(--ease);
    }
    .recommend-card:hover{
      transform:translateY(-4px);
      box-shadow:var(--shadow-strong);
      border-color:rgba(255,107,74,.24);
    }
    .recommend-card h3{
      margin:14px 0 10px;
      color:var(--ink);
      font-size:20px;
      line-height:1.4;
      font-weight:800;
    }
    .recommend-card p{
      margin:0 0 16px;
      color:var(--muted);
      font-size:15px;
      line-height:1.75;
    }
    .text-link{
      display:inline-flex;
      align-items:center;
      gap:7px;
      color:#7E4B38;
      font-weight:800;
      font-size:14px;
    }
    .text-link:hover{
      color:var(--accent);
      gap:10px;
    }

    .mini-cta{
      margin:42px 0 0;
      border-radius:30px;
      overflow:hidden;
      border:1px solid rgba(255,255,255,.10);
      background:
        linear-gradient(115deg,rgba(255,107,74,.18),transparent 38%),
        repeating-linear-gradient(90deg,rgba(255,255,255,.05) 0 2px,transparent 2px 13px),
        linear-gradient(135deg,#221D18 0%,#17130F 100%);
      color:#FFFDF8;
      box-shadow:var(--shadow-strong);
      padding:32px;
    }
    .mini-cta h2{
      margin:0 0 10px;
      font-size:28px;
      line-height:1.25;
      font-weight:850;
    }
    .mini-cta p{
      margin:0;
      color:rgba(255,253,249,.68);
      line-height:1.75;
    }

    .site-footer{
      margin-top:74px;
      padding:46px 0 30px;
      background:
        radial-gradient(circle at 80% 0,rgba(255,107,74,.10),transparent 22rem),
        linear-gradient(180deg,#211C18 0%,#17130F 100%);
      color:rgba(255,253,249,.68);
      border-top:1px solid rgba(255,255,255,.08);
    }
    .footer-brand{
      color:#FFFDF8;
      font-size:20px;
      font-weight:850;
      margin-bottom:12px;
    }
    .footer-desc{
      max-width:620px;
      margin:0;
      color:rgba(255,253,249,.62);
      line-height:1.8;
    }
    .footer-links{
      display:flex;
      flex-wrap:wrap;
      justify-content:flex-end;
      gap:10px 18px;
    }
    .footer-links a{
      color:rgba(255,253,249,.66);
      font-size:14px;
      font-weight:680;
    }
    .footer-links a:hover{
      color:var(--accent);
      text-decoration:underline;
      text-underline-offset:4px;
    }
    .copyright{
      margin-top:28px;
      padding-top:22px;
      border-top:1px solid rgba(255,255,255,.08);
      display:flex;
      justify-content:space-between;
      gap:16px;
      flex-wrap:wrap;
      color:rgba(255,253,249,.46);
      font-size:13px;
      line-height:1.7;
    }

    @media (max-width:1199.98px){
      :root{--sidebar:92px}
      .sidebar{width:var(--sidebar);padding:20px 12px}
      .brand-block{justify-content:center;padding:6px 0 18px}
      .brand-text,.side-link .label,.side-note,.side-bottom .btn span{display:none}
      .side-link{justify-content:center;padding:13px 8px}
      .side-link.active::before{left:-12px}
      .side-bottom .btn{
        width:52px;
        height:52px;
        padding:0;
        display:grid;
        place-items:center;
      }
      .main-panel{margin-left:var(--sidebar)}
      .content-wrap{width:min(100% - 48px,var(--content-max))}
      .article-hero{padding:36px}
      .article-card{padding:36px}
    }

    @media (max-width:991.98px){
      .article-hero::after{opacity:.18}
      .sticky-aside{
        position:relative;
        top:auto;
        margin-top:24px;
      }
      .section-head{
        align-items:flex-start;
        flex-direction:column;
      }
      .footer-links{
        justify-content:flex-start;
        margin-top:24px;
      }
    }

    @media (max-width:767.98px){
      body{font-size:15px}
      .app-shell{display:block}
      .sidebar{display:none}
      .mobile-topbar{
        display:flex;
        align-items:center;
        justify-content:space-between;
        gap:12px;
      }
      .main-panel{margin-left:0}
      .content-wrap{width:min(100% - 32px,var(--content-max))}
      .article-main{padding:28px 0 0}
      .breadcrumb .active{max-width:56vw}
      .article-hero{
        border-radius:26px;
        padding:28px 22px;
        margin-bottom:20px;
      }
      .article-title{
        font-size:clamp(30px,9vw,36px);
      }
      .article-desc{font-size:16px}
      .article-meta{gap:8px}
      .meta-item{font-size:13px;padding:7px 10px}
      .article-card{
        padding:28px 20px;
        border-radius:26px;
      }
      .article-body{
        font-size:16px;
        line-height:1.85;
      }
      .article-body h2{font-size:25px}
      .article-body h3{font-size:20px}
      .article-body table{
        display:block;
        overflow-x:auto;
        white-space:nowrap;
      }
      .section-title{font-size:27px}
      .mini-cta{padding:26px 22px;border-radius:26px}
      .mini-cta .btn{
        width:100%;
        margin-top:18px;
      }
      .site-footer{
        margin-top:56px;
        padding:38px 0 26px;
      }
      .copyright{display:block}
      .copyright span{display:block;margin-top:8px}
    }

    @media (max-width:520px){
      .mobile-brand span:last-child{
        max-width:220px;
        white-space:nowrap;
        overflow:hidden;
        text-overflow:ellipsis;
      }
      .article-kicker{gap:8px}
      .badge-pill{font-size:12px;padding:7px 10px}
      .btn-brand,.btn-soft,.btn-dark-soft{
        width:100%;
        justify-content:center;
      }
      .aside-card,.recommend-card{border-radius:22px}
      .footer-links{gap:8px 14px}
    }