/* roulang page: index */
:root{
    --ink:#0B0D0C;
    --ink-2:#171B19;
    --paper:#F5F5F1;
    --surface:#FFFFFF;
    --line:#E4E5DF;
    --muted:#6E7671;
    --accent:#C9F24D;
    --accent-2:#FF6B35;
    --radius-sm:8px;
    --radius-md:14px;
    --radius-lg:20px;
    --radius-full:999px;
    --shadow-sm:0 1px 2px rgba(11,13,12,.04);
    --shadow-md:0 12px 32px rgba(11,13,12,.10);
    --container:1200px;
    --gutter:20px;
    --font-sans:"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Noto Sans SC","Inter","Helvetica Neue",Arial,sans-serif;
    --font-mono:"Inter","SF Mono","Roboto Mono",ui-monospace,monospace;
  }
  @media (min-width:640px){ :root{ --gutter:24px; } }
  @media (min-width:1024px){ :root{ --gutter:32px; } }

  *,*::before,*::after{ box-sizing:border-box; }
  html{ scroll-behavior:smooth; -webkit-text-size-adjust:100%; }
  body{
    margin:0;
    background:var(--paper);
    color:var(--ink);
    font-family:var(--font-sans);
    font-size:16px;
    line-height:1.7;
    letter-spacing:.01em;
    -webkit-font-smoothing:antialiased;
    overflow-x:hidden;
  }
  img{ display:block; max-width:100%; height:auto; }
  a{ color:inherit; text-decoration:none; }
  ul,ol{ margin:0; padding:0; list-style:none; }
  h1,h2,h3,h4,p,dl,dd,dt,figure{ margin:0; }
  button{ font:inherit; color:inherit; border:0; background:none; cursor:pointer; }
  ::selection{ background:var(--accent); color:var(--ink); }
  :focus-visible{ outline:2px solid var(--accent); outline-offset:3px; border-radius:6px; }

  .container{ width:100%; max-width:var(--container); margin:0 auto; padding-left:var(--gutter); padding-right:var(--gutter); }
  .mono{ font-family:var(--font-mono); font-variant-numeric:tabular-nums; }

  /* ---------- header ---------- */
  .site-header{
    position:fixed; top:12px; left:0; right:0; z-index:60;
    padding-left:var(--gutter); padding-right:var(--gutter);
  }
  @media (min-width:1024px){ .site-header{ top:16px; } }
  .nav-shell{
    max-width:1140px; margin:0 auto;
    display:flex; align-items:center; gap:12px;
    padding:8px 10px 8px 14px;
    border-radius:var(--radius-full);
    background:rgba(255,255,255,.76);
    border:1px solid var(--line);
    backdrop-filter:blur(14px);
    -webkit-backdrop-filter:blur(14px);
    transition:background .25s ease, box-shadow .25s ease, border-color .25s ease;
  }
  .site-header.is-scrolled .nav-shell{
    background:rgba(255,255,255,.94);
    box-shadow:0 10px 30px rgba(11,13,12,.12);
    border-color:#d9dbd2;
  }
  .brand{ display:flex; align-items:center; gap:10px; font-weight:800; letter-spacing:-.02em; }
  .brand-mark{
    display:grid; place-items:center; width:32px; height:32px;
    border-radius:10px; background:var(--ink); color:var(--accent); flex:0 0 auto;
  }
  .brand-text{ font-size:15px; white-space:nowrap; }
  @media (min-width:1024px){ .brand-text{ font-size:16px; } }

  .nav-links{ display:none; gap:2px; margin-left:auto; }
  @media (min-width:1024px){ .nav-links{ display:flex; } }
  .nav-link{
    position:relative; padding:8px 12px; border-radius:var(--radius-full);
    font-size:14px; font-weight:500; color:var(--muted);
    transition:color .2s ease, background .2s ease;
  }
  .nav-link:hover{ color:var(--ink); background:rgba(11,13,12,.05); }
  .nav-link::after{
    content:""; position:absolute; left:12px; right:12px; bottom:3px; height:2px;
    border-radius:2px; background:var(--accent);
    transform:scaleX(0); transform-origin:left; transition:transform .2s ease;
  }
  .nav-link:hover::after, .nav-link.is-active::after{ transform:scaleX(1); }
  .nav-link.is-active{ color:var(--ink); font-weight:700; }

  .nav-cta{ display:none; }
  @media (min-width:1024px){ .nav-cta{ display:flex; margin-left:6px; } }

  .nav-toggle{
    margin-left:auto; width:40px; height:40px; border-radius:var(--radius-full);
    display:grid; place-items:center; gap:4px; align-content:center;
    border:1px solid var(--line); background:rgba(255,255,255,.6);
  }
  @media (min-width:1024px){ .nav-toggle{ display:none; } }
  .nav-toggle span{
    display:block; width:16px; height:2px; border-radius:2px; background:var(--ink);
    transition:transform .22s ease, opacity .22s ease;
  }
  .nav-toggle.is-open span:nth-child(1){ transform:translateY(6px) rotate(45deg); }
  .nav-toggle.is-open span:nth-child(2){ opacity:0; }
  .nav-toggle.is-open span:nth-child(3){ transform:translateY(-6px) rotate(-45deg); }

  .mobile-nav{
    position:fixed; inset:0; z-index:70;
    background:rgba(11,13,12,.97);
    color:#fff;
    padding:104px var(--gutter) 40px;
    display:flex; flex-direction:column; gap:6px;
    opacity:0; visibility:hidden; transform:translateY(-10px);
    transition:opacity .25s ease, transform .25s ease, visibility .25s;
  }
  .mobile-nav.is-open{ opacity:1; visibility:visible; transform:none; }
  .mobile-nav a{
    font-size:20px; font-weight:700; padding:16px 4px;
    border-bottom:1px solid rgba(255,255,255,.1);
  }
  .mobile-nav a.is-active{ color:var(--accent); }
  .mobile-nav .btn{ margin-top:24px; width:100%; }
  @media (min-width:1024px){ .mobile-nav{ display:none; } }

  /* ---------- buttons ---------- */
  .btn{
    display:inline-flex; align-items:center; justify-content:center; gap:8px;
    padding:14px 28px; border-radius:var(--radius-full);
    font-size:15px; font-weight:700; letter-spacing:.01em; white-space:nowrap;
    transition:transform .2s ease, box-shadow .2s ease, background .2s ease, color .2s ease, border-color .2s ease, filter .2s ease;
  }
  .btn:active{ transform:scale(.98); }
  .btn-primary{ background:var(--accent); color:var(--ink); }
  .btn-primary:hover{ filter:brightness(1.06); transform:translateY(-2px); box-shadow:0 12px 26px rgba(201,242,77,.38); }
  .btn-ghost{ border:1px solid var(--line); color:var(--ink); background:transparent; }
  .btn-ghost:hover{ background:rgba(11,13,12,.05); transform:translateY(-2px); }
  .btn-ghost-light{ border:1px solid rgba(255,255,255,.35); color:#fff; background:rgba(255,255,255,.07); }
  .btn-ghost-light:hover{ background:rgba(255,255,255,.16); transform:translateY(-2px); }
  .btn-dark{ background:var(--ink); color:#fff; }
  .btn-dark:hover{ background:var(--ink-2); transform:translateY(-2px); box-shadow:0 12px 26px rgba(11,13,12,.22); }
  .btn-sm{ padding:9px 18px; font-size:13px; }

  /* ---------- hero ---------- */
  .hero{
    position:relative; min-height:620px; height:92vh;
    display:flex; align-items:center; overflow:hidden; background:var(--ink);
  }
  @media (max-width:1023px){ .hero{ height:auto; min-height:600px; } }
  .hero-bg{
    position:absolute; inset:0;
    background-image:url('/assets/images/backpic/back-1.webp');
    background-size:cover; background-position:center 28%;
    transform:scale(1.03);
  }
  .hero::after{
    content:""; position:absolute; inset:0;
    background:linear-gradient(to top, rgba(11,13,12,.97) 0%, rgba(11,13,12,.78) 42%, rgba(11,13,12,.42) 100%);
  }
  .hero-grid{
    position:absolute; inset:0; z-index:1; opacity:.05; pointer-events:none;
    background-image:linear-gradient(rgba(255,255,255,.7) 1px, transparent 1px),
                     linear-gradient(90deg, rgba(255,255,255,.7) 1px, transparent 1px);
    background-size:64px 64px;
  }
  .hero-inner{ position:relative; z-index:2; color:#fff; padding-top:120px; padding-bottom:64px; }
  @media (min-width:1024px){ .hero-inner{ padding-top:150px; padding-bottom:88px; } }
  .hero-eyebrow{
    display:inline-flex; align-items:center; gap:8px;
    padding:6px 14px; border-radius:var(--radius-full);
    border:1px solid rgba(255,255,255,.24); background:rgba(255,255,255,.08);
    font-size:13px; letter-spacing:.04em; color:rgba(255,255,255,.92);
  }
  .hero-eyebrow i{ width:6px; height:6px; border-radius:50%; background:var(--accent); display:block; }
  .hero-title{
    margin-top:22px; font-size:clamp(2rem,4.6vw,3.75rem); line-height:1.12;
    font-weight:800; letter-spacing:-.02em; max-width:15em;
  }
  .hero-sub{
    margin-top:18px; font-size:clamp(15px,1.4vw,18px); line-height:1.7;
    color:rgba(255,255,255,.74); max-width:34em;
  }
  .hero-actions{ margin-top:34px; display:flex; flex-wrap:wrap; gap:12px; }
  .hero-stats{
    margin-top:52px; padding-top:26px;
    border-top:1px solid rgba(255,255,255,.14);
    display:grid; grid-template-columns:repeat(2,minmax(0,1fr)); gap:22px 24px;
    max-width:820px;
  }
  @media (min-width:768px){ .hero-stats{ grid-template-columns:repeat(4,minmax(0,1fr)); } }
  .hero-stat-num{
    font-family:var(--font-mono); font-variant-numeric:tabular-nums;
    font-size:clamp(1.35rem,2vw,1.75rem); font-weight:700; letter-spacing:-.02em; color:var(--accent);
  }
  .hero-stat-label{ margin-top:4px; font-size:12.5px; color:rgba(255,255,255,.62); }

  /* ---------- sections ---------- */
  .section{ padding:64px 0; }
  @media (min-width:1024px){ .section{ padding:104px 0; } }
  .section-dark{ background:var(--ink); color:#fff; }
  .section-dark .section-title{ color:#fff; }
  .section-dark .section-desc{ color:rgba(255,255,255,.62); }
  .section-dark .section-eyebrow{ color:rgba(255,255,255,.55); }

  .section-head{ max-width:760px; margin-bottom:44px; }
  .section-eyebrow{
    display:inline-flex; align-items:center; gap:10px;
    font-size:12.5px; font-weight:700; letter-spacing:.12em;
    color:var(--muted); text-transform:uppercase;
  }
  .section-eyebrow::before{ content:""; width:24px; height:2px; border-radius:2px; background:var(--accent); }
  .section-title{
    margin-top:16px; font-size:clamp(1.5rem,2.6vw,2.25rem);
    line-height:1.22; font-weight:700; letter-spacing:-.02em;
  }
  .section-desc{ margin-top:14px; color:var(--muted); font-size:16px; max-width:62ch; }

  .card{
    position:relative; background:var(--surface);
    border:1px solid var(--line); border-radius:var(--radius-md);
    box-shadow:var(--shadow-sm); overflow:hidden;
    transition:transform .2s ease, box-shadow .2s ease, border-color .2s ease;
  }
  .card:hover{ transform:translateY(-4px); box-shadow:var(--shadow-md); border-color:#d6d8cf; }

  /* ---------- feature asymmetric grid ---------- */
  .feature-grid{ display:grid; gap:20px; }
  @media (min-width:1024px){ .feature-grid{ grid-template-columns:repeat(12,1fr); } }
  .feature-main{ display:flex; flex-direction:column; }
  @media (min-width:1024px){ .feature-main{ grid-column:span 7; } }
  .feature-side{ display:grid; gap:20px; }
  @media (min-width:1024px){ .feature-side{ grid-column:span 5; } }
  .feature-media{ aspect-ratio:16/9; overflow:hidden; background:#ECEDE6; }
  .feature-media img{ width:100%; height:100%; object-fit:cover; transition:transform .4s ease; }
  .card:hover .feature-media img{ transform:scale(1.04); }
  .feature-body{ padding:26px 24px 28px; }
  .feature-title{ font-size:20px; font-weight:700; letter-spacing:-.01em; line-height:1.35; }
  .feature-text{ margin-top:12px; color:var(--muted); font-size:14.5px; }
  .feature-mini{ padding:22px 24px; display:flex; gap:16px; align-items:flex-start; }
  .mini-icon{
    flex:0 0 40px; width:40px; height:40px; border-radius:12px;
    display:grid; place-items:center; background:rgba(201,242,77,.22); color:var(--ink);
  }
  .mini-title{ font-size:16px; font-weight:700; }
  .mini-text{ margin-top:6px; color:var(--muted); font-size:14px; }

  /* ---------- steps ---------- */
  .steps{ display:grid; gap:34px; }
  @media (min-width:1024px){ .steps{ grid-template-columns:repeat(4,1fr); gap:0; } }
  .step{ position:relative; padding-left:60px; }
  .step-num{
    position:absolute; left:0; top:-6px;
    font-family:var(--font-mono); font-size:36px; font-weight:800; line-height:1;
    color:transparent; -webkit-text-stroke:1.5px #b7bcac;
  }
  .step::after{
    content:""; position:absolute; left:20px; top:46px; bottom:-34px; width:1px; background:var(--line);
  }
  .step:last-child::after{ display:none; }
  .step-title{ font-size:17px; font-weight:700; }
  .step-text{ margin-top:8px; color:var(--muted); font-size:14px; max-width:32ch; }
  @media (min-width:1024px){
    .step{ padding:0 26px 0 0; }
    .step::after{ display:none; }
    .step + .step{ padding-left:26px; border-left:1px solid var(--line); }
    .step-num{ position:static; display:block; margin-bottom:20px; font-size:44px; }
  }
  .section-dark .step + .step{ border-left-color:rgba(255,255,255,.14); }
  .section-dark .step::after{ background:rgba(255,255,255,.14); }
  .section-dark .step-num{ -webkit-text-stroke:1.5px rgba(255,255,255,.3); }
  .section-dark .step-text{ color:rgba(255,255,255,.6); }

  /* ---------- badges ---------- */
  .badge{
    display:inline-flex; align-items:center; gap:5px;
    padding:3px 10px; border-radius:var(--radius-full);
    font-size:12px; font-weight:600; line-height:1.6;
    border:1px solid var(--line); background:rgba(255,255,255,.92); color:var(--muted);
  }
  .badge-rare{ border-color:var(--accent); color:var(--ink); background:rgba(201,242,77,.22); }
  .badge-legend{ border-color:var(--accent-2); color:#b93f12; background:rgba(255,107,53,.16); }

  /* ---------- rewards ---------- */
  .reward-grid{ display:flex; gap:16px; overflow-x:auto; scroll-snap-type:x mandatory; padding-bottom:14px; margin-bottom:-14px; }
  .reward-card{ flex:0 0 78%; scroll-snap-align:start; display:flex; flex-direction:column; }
  @media (min-width:640px){ .reward-card{ flex:0 0 46%; } }
  @media (min-width:1024px){
    .reward-grid{ display:grid; grid-template-columns:repeat(4,1fr); gap:20px; overflow:visible; padding-bottom:0; margin-bottom:0; }
    .reward-card{ flex:none; }
  }
  .reward-grid::-webkit-scrollbar{ height:6px; }
  .reward-grid::-webkit-scrollbar-thumb{ background:#d9dbd2; border-radius:999px; }
  .reward-cover{ position:relative; aspect-ratio:4/3; overflow:hidden; background:#ECEDE6; }
  .reward-cover img{ width:100%; height:100%; object-fit:cover; transition:transform .4s ease; }
  .card:hover .reward-cover img{ transform:scale(1.05); }
  .reward-cover .badge{ position:absolute; top:12px; left:12px; }
  .reward-body{ padding:18px 18px 20px; display:flex; flex-direction:column; flex:1; }
  .reward-name{ font-size:16px; font-weight:700; }
  .reward-cond{ margin-top:auto; padding-top:14px; font-size:13px; color:var(--muted); }

  /* ---------- progress ---------- */
  .progress-panel{ padding:28px 24px 32px; }
  @media (min-width:1024px){ .progress-panel{ padding:40px 44px 44px; } }
  .seg{ display:inline-flex; gap:4px; padding:5px; border-radius:var(--radius-full); background:#EFEFE9; border:1px solid var(--line); }
  .seg-btn{ padding:8px 18px; border-radius:var(--radius-full); font-size:14px; font-weight:600; color:var(--muted); transition:background .2s ease, color .2s ease; }
  .seg-btn:hover{ color:var(--ink); }
  .seg-btn.is-active{ background:var(--ink); color:#fff; }
  .progress-list{ margin-top:32px; }
  .progress-item + .progress-item{ margin-top:24px; }
  .progress-head{ display:flex; align-items:baseline; justify-content:space-between; gap:16px; font-size:15px; font-weight:600; }
  .progress-val{ font-family:var(--font-mono); font-variant-numeric:tabular-nums; font-size:14px; color:var(--muted); font-weight:500; }
  .progress-track{ margin-top:10px; height:8px; border-radius:999px; background:#EDEEE7; }
  .progress-fill{
    position:relative; height:100%; width:0; border-radius:999px; background:var(--accent);
    transition:width .8s cubic-bezier(.2,.8,.2,1);
  }
  .progress-fill::after{
    content:""; position:absolute; right:-1px; top:50%; transform:translateY(-50%);
    width:10px; height:10px; border-radius:50%; background:var(--accent-2);
  }
  .progress-note{ margin-top:28px; font-size:13px; color:var(--muted); }

  /* ---------- quotes ---------- */
  .quote-grid{ display:grid; gap:20px; }
  @media (min-width:768px){ .quote-grid{ grid-template-columns:repeat(3,1fr); } }
  .quote-card{ padding:26px 24px; display:flex; flex-direction:column; gap:20px; }
  .quote-text{ font-size:15px; line-height:1.8; }
  .quote-foot{ margin-top:auto; display:flex; align-items:center; gap:12px; }
  .quote-avatar{
    width:38px; height:38px; border-radius:50%; display:grid; place-items:center;
    background:var(--ink); color:var(--accent); font-weight:700; font-size:15px; flex:0 0 auto;
  }
  .quote-name{ font-size:14px; font-weight:700; }
  .quote-meta{ font-size:12.5px; color:var(--muted); }

  /* ---------- channel cards ---------- */
  .channel-grid{ display:grid; gap:20px; }
  @media (min-width:640px){ .channel-grid{ grid-template-columns:repeat(2,1fr); } }
  @media (min-width:1024px){ .channel-grid{ grid-template-columns:repeat(4,1fr); } }
  .channel-card{ display:block; }
  .channel-cover{ aspect-ratio:3/2; overflow:hidden; background:#ECEDE6; }
  .channel-cover img{ width:100%; height:100%; object-fit:cover; transition:transform .4s ease; }
  .channel-card:hover .channel-cover img{ transform:scale(1.05); }
  .channel-body{ padding:18px 18px 20px; }
  .channel-name{ display:flex; align-items:center; justify-content:space-between; gap:10px; font-size:16px; font-weight:700; }
  .channel-name svg{ transition:transform .2s ease; flex:0 0 auto; }
  .channel-card:hover .channel-name svg{ transform:translateX(4px); }
  .channel-text{ margin-top:8px; font-size:13.5px; color:var(--muted); }

  /* ---------- posts ---------- */
  .posts-grid{ display:grid; gap:20px; }
  @media (min-width:1024px){ .posts-grid{ grid-template-columns:repeat(12,1fr); } }
  .post-feature{ display:flex; flex-direction:column; }
  @media (min-width:1024px){ .post-feature{ grid-column:span 6; } }
  .post-cover{ aspect-ratio:16/9; overflow:hidden; background:#ECEDE6; }
  .post-cover img{ width:100%; height:100%; object-fit:cover; transition:transform .4s ease; }
  .card:hover .post-cover img{ transform:scale(1.04); }
  .post-body{ padding:22px 24px 26px; }
  .post-title{ margin-top:12px; font-size:19px; font-weight:700; line-height:1.4; }
  .post-excerpt{
    margin-top:10px; color:var(--muted); font-size:14px; line-height:1.7;
    display:-webkit-box; -webkit-line-clamp:2; -webkit-box-orient:vertical; overflow:hidden;
  }
  .post-meta{ margin-top:14px; display:flex; flex-wrap:wrap; align-items:center; gap:12px; font-size:12.5px; color:var(--muted); }
  .post-list{ display:flex; flex-direction:column; gap:12px; }
  @media (min-width:1024px){ .post-list{ grid-column:span 6; } }
  .post-row{
    display:flex; gap:14px; padding:14px; align-items:center;
    background:var(--surface); border:1px solid var(--line); border-radius:var(--radius-md);
    box-shadow:var(--shadow-sm);
    transition:transform .2s ease, box-shadow .2s ease, border-color .2s ease;
  }
  .post-row:hover{ transform:translateY(-2px); box-shadow:var(--shadow-md); border-color:#d6d8cf; }
  .post-thumb{ flex:0 0 104px; aspect-ratio:3/2; border-radius:10px; overflow:hidden; background:#ECEDE6; }
  .post-thumb img{ width:100%; height:100%; object-fit:cover; }
  .post-row-title{
    font-size:15px; font-weight:700; line-height:1.45;
    display:-webkit-box; -webkit-line-clamp:1; -webkit-box-orient:vertical; overflow:hidden;
  }
  .post-row-text{
    margin-top:5px; font-size:13px; color:var(--muted);
    display:-webkit-box; -webkit-line-clamp:1; -webkit-box-orient:vertical; overflow:hidden;
  }
  .post-row-meta{ margin-top:8px; display:flex; align-items:center; gap:10px; font-size:12.5px; color:var(--muted); }

  .empty-state{
    grid-column:1 / -1;
    padding:56px 24px; text-align:center;
    background:var(--surface); border:1px dashed var(--line); border-radius:var(--radius-md);
  }
  .empty-state svg{ margin:0 auto 16px; color:#b7bcac; }
  .empty-state p{ font-size:15px; color:var(--muted); }
  .empty-state .btn{ margin-top:20px; }

  /* ---------- faq ---------- */
  .faq-list{ border-top:1px solid var(--line); }
  .faq-item{ border-bottom:1px solid var(--line); }
  .faq-item summary{
    display:flex; align-items:center; justify-content:space-between; gap:20px;
    padding:22px 0; font-size:17px; font-weight:600; cursor:pointer; list-style:none;
  }
  .faq-item summary::-webkit-details-marker{ display:none; }
  .faq-item summary:hover{ color:var(--ink-2); }
  .faq-icon{ position:relative; flex:0 0 20px; width:20px; height:20px; }
  .faq-icon::before,.faq-icon::after{
    content:""; position:absolute; left:50%; top:50%; background:var(--ink);
    border-radius:2px; transform:translate(-50%,-50%);
  }
  .faq-icon::before{ width:14px; height:2px; }
  .faq-icon::after{ width:2px; height:14px; transition:transform .2s ease, opacity .2s ease; }
  .faq-item[open] .faq-icon::after{ transform:translate(-50%,-50%) rotate(90deg); opacity:0; }
  .faq-answer{ padding:0 0 24px; color:var(--muted); font-size:15px; line-height:1.8; max-width:72ch; }

  /* ---------- cta band ---------- */
  .cta-band{ padding:0 0 72px; }
  @media (min-width:1024px){ .cta-band{ padding:0 0 104px; } }
  .cta-inner{
    background:var(--ink); color:#fff; border-radius:24px;
    padding:40px 28px; display:flex; flex-direction:column; gap:24px;
    position:relative; overflow:hidden;
  }
  @media (min-width:768px){
    .cta-inner{ padding:52px 48px; flex-direction:row; align-items:center; justify-content:space-between; gap:40px; }
  }
  .cta-inner::before{
    content:""; position:absolute; right:-80px; top:-80px; width:280px; height:280px;
    border:1px solid rgba(201,242,77,.24); border-radius:50%;
  }
  .cta-inner::after{
    content:""; position:absolute; right:20px; bottom:-120px; width:200px; height:200px;
    border:1px solid rgba(255,255,255,.1); border-radius:50%;
  }
  .cta-title{ position:relative; z-index:1; font-size:clamp(1.35rem,2.2vw,1.9rem); font-weight:700; letter-spacing:-.02em; line-height:1.3; }
  .cta-text{ position:relative; z-index:1; margin-top:10px; color:rgba(255,255,255,.66); font-size:15px; max-width:44ch; }
  .cta-inner .btn{ position:relative; z-index:1; }

  /* ---------- footer ---------- */
  .site-footer{ background:var(--ink); color:rgba(255,255,255,.72); padding:64px 0 32px; }
  @media (min-width:1024px){ .site-footer{ padding:80px 0 32px; } }
  .footer-grid{ display:grid; gap:40px; }
  @media (min-width:768px){ .footer-grid{ grid-template-columns:repeat(2,1fr); } }
  @media (min-width:1024px){ .footer-grid{ grid-template-columns:1.6fr 1fr 1fr 1fr; gap:48px; } }
  .footer-brand .brand{ color:#fff; }
  .footer-brand .brand-mark{ background:var(--accent); color:var(--ink); }
  .footer-desc{ margin-top:18px; font-size:14px; line-height:1.8; color:rgba(255,255,255,.6); max-width:38ch; }
  .footer-title{ font-size:14px; font-weight:700; color:#fff; letter-spacing:.02em; }
  .footer-links{ margin-top:18px; display:flex; flex-direction:column; gap:12px; }
  .footer-links a{ font-size:14px; color:rgba(255,255,255,.66); transition:color .2s ease; }
  .footer-links a:hover{ color:var(--accent); }
  .footer-bottom{
    margin-top:52px; padding-top:24px; border-top:1px solid rgba(255,255,255,.12);
    display:flex; flex-wrap:wrap; gap:10px 24px; align-items:center; justify-content:space-between;
    font-size:13px; color:rgba(255,255,255,.5);
  }

  /* ---------- reveal ---------- */
  .js .reveal{ opacity:0; transform:translateY(12px); transition:opacity .3s ease, transform .3s ease; }
  .js .reveal.is-visible{ opacity:1; transform:none; }
  @media (prefers-reduced-motion: reduce){
    .js .reveal{ opacity:1 !important; transform:none !important; transition:none !important; }
    .progress-fill{ transition:none !important; }
    html{ scroll-behavior:auto; }
  }

/* roulang page: category1 */
:root{
    --ink:#0B0D0C;
    --ink2:#171B19;
    --paper:#F5F5F1;
    --surface:#FFFFFF;
    --line:#E4E5DF;
    --muted:#6E7671;
    --accent:#C9F24D;
    --accent2:#FF6B35;
    --r-sm:8px;
    --r-md:14px;
    --r-lg:20px;
    --r-pill:999px;
    --sh-1:0 1px 2px rgba(11,13,12,.04);
    --sh-2:0 12px 32px rgba(11,13,12,.10);
    --container:1200px;
    --ease:cubic-bezier(.22,.61,.36,1);
  }

  *,*::before,*::after{box-sizing:border-box;}
  html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
  body{
    margin:0;
    background:var(--paper);
    color:var(--ink);
    font-family:'PingFang SC','Hiragino Sans GB','Microsoft YaHei','Source Han Sans SC','Inter','Helvetica Neue',Arial,sans-serif;
    font-size:16px;
    line-height:1.7;
    letter-spacing:.01em;
    -webkit-font-smoothing:antialiased;
  }
  img{max-width:100%;display:block;}
  a{color:inherit;text-decoration:none;}
  button{font:inherit;color:inherit;background:none;border:0;cursor:pointer;}
  h1,h2,h3,h4{margin:0;letter-spacing:-.02em;line-height:1.2;}
  p{margin:0;}
  ul,ol{margin:0;padding:0;list-style:none;}
  input,textarea,select{font:inherit;}
  ::selection{background:var(--accent);color:var(--ink);}
  :focus-visible{outline:2px solid var(--ink);outline-offset:2px;border-radius:6px;}

  .container{
    width:100%;
    max-width:var(--container);
    margin:0 auto;
    padding:0 20px;
  }
  @media (min-width:768px){.container{padding:0 24px;}}
  @media (min-width:1024px){.container{padding:0 32px;}}
  @media (min-width:1440px){.container{max-width:1200px;padding:0 40px;}}

  .num{font-variant-numeric:tabular-nums;font-feature-settings:"tnum";font-family:'Inter','Helvetica Neue',Arial,sans-serif;}

  /* ============ 头部与悬浮胶囊导航 ============ */
  .site-header{
    position:sticky;
    top:0;
    z-index:60;
    padding:16px 0 0;
    pointer-events:none;
  }
  .nav-shell{
    pointer-events:auto;
    display:flex;
    align-items:center;
    justify-content:space-between;
    gap:16px;
    padding:10px 12px 10px 18px;
    border-radius:var(--r-pill);
    border:1px solid rgba(255,255,255,.14);
    background:rgba(11,13,12,.55);
    -webkit-backdrop-filter:blur(14px);
    backdrop-filter:blur(14px);
    transition:background .25s var(--ease),box-shadow .25s var(--ease),border-color .25s var(--ease);
  }
  .site-header.is-scrolled .nav-shell{
    background:rgba(11,13,12,.82);
    box-shadow:0 14px 36px rgba(11,13,12,.24);
    border-color:rgba(255,255,255,.2);
  }
  .brand{
    display:inline-flex;
    align-items:center;
    gap:10px;
    color:#fff;
    font-weight:800;
    letter-spacing:-.02em;
    white-space:nowrap;
  }
  .brand-mark{
    display:inline-flex;
    align-items:center;
    justify-content:center;
    width:34px;height:34px;
    border-radius:var(--r-pill);
    border:1px solid rgba(255,255,255,.28);
    color:var(--accent);
    flex:0 0 auto;
    transition:transform .2s var(--ease),border-color .2s var(--ease);
  }
  .brand:hover .brand-mark{transform:rotate(-12deg);border-color:var(--accent);}
  .brand-text{font-size:16px;}
  .nav-links{
    display:none;
    align-items:center;
    gap:4px;
  }
  .nav-link{
    position:relative;
    display:inline-block;
    padding:8px 14px;
    font-size:14.5px;
    color:rgba(255,255,255,.76);
    border-radius:var(--r-pill);
    transition:color .2s var(--ease),background .2s var(--ease);
  }
  .nav-link::after{
    content:"";
    position:absolute;
    left:14px;right:14px;bottom:3px;
    height:2px;border-radius:2px;
    background:var(--accent);
    transform:scaleX(0);
    transform-origin:left;
    transition:transform .22s var(--ease);
  }
  .nav-link:hover{color:#fff;background:rgba(255,255,255,.08);}
  .nav-link:hover::after{transform:scaleX(1);}
  .nav-link.is-active{color:#fff;}
  .nav-link.is-active::after{transform:scaleX(1);}
  .nav-actions{display:flex;align-items:center;gap:8px;}
  .nav-toggle{
    display:inline-flex;
    flex-direction:column;
    justify-content:center;
    gap:4px;
    width:40px;height:40px;
    border-radius:var(--r-pill);
    border:1px solid rgba(255,255,255,.24);
    align-items:center;
    transition:background .2s var(--ease);
  }
  .nav-toggle span{display:block;width:16px;height:2px;border-radius:2px;background:#fff;transition:transform .2s var(--ease),opacity .2s var(--ease);}
  .nav-toggle[aria-expanded="true"] span:nth-child(1){transform:translateY(6px) rotate(45deg);}
  .nav-toggle[aria-expanded="true"] span:nth-child(2){opacity:0;}
  .nav-toggle[aria-expanded="true"] span:nth-child(3){transform:translateY(-6px) rotate(-45deg);}
  .nav-toggle:hover{background:rgba(255,255,255,.12);}

  .mobile-panel{
    pointer-events:auto;
    display:none;
    margin-top:12px;
    padding:18px;
    border-radius:var(--r-lg);
    background:rgba(11,13,12,.94);
    -webkit-backdrop-filter:blur(16px);
    backdrop-filter:blur(16px);
    border:1px solid rgba(255,255,255,.14);
  }
  .mobile-panel.is-open{display:block;}
  .mobile-panel a{
    display:block;
    padding:12px 4px;
    font-size:20px;
    font-weight:600;
    color:rgba(255,255,255,.82);
    border-bottom:1px solid rgba(255,255,255,.1);
  }
  .mobile-panel a.is-active{color:var(--accent);}
  .mobile-panel .mobile-cta{margin-top:16px;}
  .mobile-panel .mobile-cta .btn{width:100%;justify-content:center;}

  @media (min-width:1024px){
    .nav-links{display:flex;}
    .nav-toggle{display:none;}
    .mobile-panel{display:none !important;}
  }

  /* ============ 按钮 ============ */
  .btn{
    display:inline-flex;
    align-items:center;
    justify-content:center;
    gap:8px;
    padding:14px 28px;
    border-radius:var(--r-pill);
    font-size:15px;
    font-weight:700;
    line-height:1;
    border:1px solid transparent;
    transition:transform .18s var(--ease),background .18s var(--ease),box-shadow .18s var(--ease),color .18s var(--ease),border-color .18s var(--ease);
    white-space:nowrap;
  }
  .btn:active{transform:scale(.98);}
  .btn-primary{background:var(--accent);color:var(--ink);box-shadow:0 1px 2px rgba(11,13,12,.06);}
  .btn-primary:hover{filter:brightness(1.06);transform:translateY(-2px);box-shadow:var(--sh-2);}
  .btn-ghost{background:transparent;color:var(--ink);border-color:var(--line);}
  .btn-ghost:hover{background:rgba(11,13,12,.05);transform:translateY(-2px);}
  .btn-outline-light{background:transparent;color:#fff;border-color:rgba(255,255,255,.34);}
  .btn-outline-light:hover{background:rgba(255,255,255,.1);transform:translateY(-2px);}
  .btn-sm{padding:10px 20px;font-size:14px;}

  /* ============ 分类横幅 ============ */
  .hero-banner{
    position:relative;
    margin-top:-86px;
    padding:150px 0 72px;
    background:var(--ink);
    overflow:hidden;
    color:#fff;
  }
  .hero-bg{
    position:absolute;
    inset:0;
    background-image:url('/assets/images/backpic/back-2.png');
    background-size:cover;
    background-position:center 32%;
    opacity:.5;
  }
  .hero-mask{
    position:absolute;
    inset:0;
    background:linear-gradient(180deg,rgba(11,13,12,.88) 0%,rgba(11,13,12,.72) 46%,rgba(11,13,12,.96) 100%);
  }
  .hero-grid-lines{
    position:absolute;
    inset:0;
    background-image:linear-gradient(rgba(255,255,255,.05) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.05) 1px,transparent 1px);
    background-size:64px 64px;
    opacity:.55;
  }
  .hero-inner{position:relative;max-width:900px;}
  .breadcrumb{
    display:flex;
    align-items:center;
    gap:8px;
    font-size:13px;
    color:rgba(255,255,255,.6);
    margin-bottom:20px;
    flex-wrap:wrap;
  }
  .breadcrumb a:hover{color:var(--accent);}
  .breadcrumb .sep{color:rgba(255,255,255,.3);}
  .breadcrumb .current{color:#fff;}
  .hero-tag{
    display:inline-flex;
    align-items:center;
    gap:8px;
    padding:6px 14px;
    border-radius:var(--r-pill);
    border:1px solid rgba(201,242,77,.5);
    color:var(--accent);
    font-size:12.5px;
    font-weight:600;
    letter-spacing:.06em;
    margin-bottom:20px;
  }
  .hero-tag .dot{width:7px;height:7px;border-radius:50%;background:var(--accent2);box-shadow:0 0 0 4px rgba(255,107,53,.18);}
  .hero-title{
    font-size:clamp(2rem,4.8vw,4rem);
    font-weight:800;
    letter-spacing:-.03em;
    line-height:1.08;
    margin-bottom:18px;
  }
  .hero-title em{font-style:normal;color:var(--accent);}
  .hero-lead{
    max-width:640px;
    font-size:clamp(15px,1.4vw,18px);
    line-height:1.85;
    color:rgba(255,255,255,.76);
    margin-bottom:32px;
  }
  .hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin-bottom:52px;}
  .hero-stats{
    display:grid;
    grid-template-columns:repeat(2,minmax(0,1fr));
    gap:20px 28px;
    padding-top:28px;
    border-top:1px solid rgba(255,255,255,.14);
    max-width:820px;
  }
  @media (min-width:768px){.hero-stats{grid-template-columns:repeat(4,minmax(0,1fr));}}
  .stat-num{
    font-size:clamp(1.35rem,2.4vw,1.9rem);
    font-weight:800;
    color:#fff;
    letter-spacing:-.02em;
    display:block;
    margin-bottom:4px;
  }
  .stat-num i{font-style:normal;color:var(--accent);}
  .stat-label{font-size:12.5px;color:rgba(255,255,255,.6);}

  /* ============ 通用板块 ============ */
  .section{padding:72px 0;}
  @media (min-width:1024px){.section{padding:96px 0;}}
  .section-head{max-width:720px;margin-bottom:44px;}
  .eyebrow{
    display:inline-block;
    font-size:12.5px;
    font-weight:700;
    letter-spacing:.14em;
    color:var(--muted);
    text-transform:uppercase;
    margin-bottom:14px;
  }
  .section-title{
    font-size:clamp(1.5rem,2.6vw,2.25rem);
    font-weight:700;
    margin-bottom:16px;
  }
  .section-desc{font-size:16px;color:var(--muted);line-height:1.9;}

  .panel{
    background:var(--surface);
    border:1px solid var(--line);
    border-radius:var(--r-lg);
    box-shadow:var(--sh-1);
  }

  /* ============ 左锚点 + 右内容流 ============ */
  .split-layout{
    display:grid;
    grid-template-columns:1fr;
    gap:32px;
  }
  @media (min-width:1024px){
    .split-layout{grid-template-columns:264px minmax(0,1fr);gap:48px;}
  }
  .side-nav{
    align-self:start;
  }
  @media (min-width:1024px){
    .side-nav{position:sticky;top:96px;}
  }
  .side-nav-title{
    font-size:12.5px;
    font-weight:700;
    letter-spacing:.14em;
    color:var(--muted);
    margin-bottom:14px;
    text-transform:uppercase;
  }
  .side-links{
    display:flex;
    gap:8px;
    overflow-x:auto;
    padding-bottom:6px;
    -webkit-overflow-scrolling:touch;
  }
  .side-links::-webkit-scrollbar{height:4px;}
  .side-links::-webkit-scrollbar-thumb{background:var(--line);border-radius:4px;}
  @media (min-width:1024px){
    .side-links{flex-direction:column;overflow:visible;gap:2px;padding-bottom:0;}
  }
  .side-link{
    display:block;
    padding:11px 14px;
    border-radius:var(--r-md);
    font-size:14.5px;
    color:var(--muted);
    border-left:2px solid transparent;
    white-space:nowrap;
    transition:color .2s var(--ease),background .2s var(--ease),border-color .2s var(--ease);
  }
  .side-link:hover{color:var(--ink);background:rgba(11,13,12,.04);}
  .side-link.is-active{color:var(--ink);font-weight:700;background:rgba(201,242,77,.28);border-left-color:var(--accent);}
  .side-card{
    margin-top:24px;
    padding:18px;
    border-radius:var(--r-lg);
    background:var(--ink);
    color:#fff;
  }
  .side-card h3{font-size:15px;font-weight:700;margin-bottom:10px;}
  .side-card p{font-size:13.5px;color:rgba(255,255,255,.68);line-height:1.8;margin-bottom:14px;}
  .side-card .btn{width:100%;justify-content:center;padding:11px 16px;font-size:13.5px;}

  .content-flow{display:flex;flex-direction:column;gap:28px;}
  .flow-block{
    padding:28px;
    border-radius:var(--r-lg);
    background:var(--surface);
    border:1px solid var(--line);
    box-shadow:var(--sh-1);
    scroll-margin-top:110px;
    transition:box-shadow .22s var(--ease),transform .22s var(--ease);
  }
  .flow-block:hover{box-shadow:var(--sh-2);}
  @media (min-width:768px){.flow-block{padding:36px;}}
  .flow-head{
    display:flex;
    align-items:flex-start;
    justify-content:space-between;
    gap:16px;
    margin-bottom:18px;
    flex-wrap:wrap;
  }
  .flow-title{font-size:clamp(1.125rem,1.8vw,1.4rem);font-weight:700;}
  .flow-text{font-size:15.5px;color:var(--muted);line-height:1.9;margin-bottom:22px;}

  /* 图文错位 */
  .media-split{
    display:grid;
    grid-template-columns:1fr;
    gap:24px;
    align-items:center;
  }
  @media (min-width:768px){
    .media-split{grid-template-columns:minmax(0,1.05fr) minmax(0,.95fr);gap:32px;}
  }
  .media-figure{
    position:relative;
    border-radius:var(--r-md);
    overflow:hidden;
    border:1px solid var(--line);
    aspect-ratio:16/10;
    background:var(--paper);
  }
  .media-figure img{width:100%;height:100%;object-fit:cover;transition:transform .5s var(--ease);}
  .media-figure:hover img{transform:scale(1.04);}
  .media-badge{
    position:absolute;
    left:14px;top:14px;
    padding:5px 12px;
    border-radius:var(--r-pill);
    font-size:12px;
    font-weight:600;
    background:rgba(11,13,12,.72);
    color:#fff;
    -webkit-backdrop-filter:blur(6px);
    backdrop-filter:blur(6px);
  }

  .point-list{display:flex;flex-direction:column;gap:16px;}
  .point-item{display:flex;gap:14px;align-items:flex-start;}
  .point-idx{
    flex:0 0 auto;
    width:26px;height:26px;
    border-radius:var(--r-pill);
    border:1px solid var(--line);
    display:flex;align-items:center;justify-content:center;
    font-size:12px;font-weight:700;color:var(--muted);
  }
  .point-item h4{font-size:15px;font-weight:700;margin-bottom:4px;}
  .point-item p{font-size:14px;color:var(--muted);line-height:1.8;}

  /* ============ 赛程列表 ============ */
  .match-list{border-top:1px solid var(--line);}
  .match-row{
    display:grid;
    grid-template-columns:64px minmax(0,1fr) auto;
    align-items:center;
    gap:14px;
    padding:16px 4px;
    border-bottom:1px solid var(--line);
    transition:background .2s var(--ease),padding-left .2s var(--ease);
  }
  .match-row:hover{background:rgba(11,13,12,.025);padding-left:10px;}
  .match-time{font-size:14px;color:var(--muted);}
  .match-teams{display:flex;flex-direction:column;gap:4px;min-width:0;}
  .match-teams strong{font-size:15px;font-weight:600;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;}
  .match-teams span{font-size:12.5px;color:var(--muted);}
  .match-score{
    display:flex;
    align-items:center;
    gap:10px;
    justify-content:flex-end;
  }
  .match-score b{font-size:17px;font-weight:800;letter-spacing:-.01em;}

  .badge{
    display:inline-flex;
    align-items:center;
    gap:6px;
    padding:4px 11px;
    border-radius:var(--r-pill);
    font-size:12px;
    font-weight:600;
    line-height:1.6;
    border:1px solid var(--line);
    color:var(--muted);
    background:transparent;
    white-space:nowrap;
  }
  .badge-accent{border-color:var(--accent);color:#3f5410;background:rgba(201,242,77,.22);}
  .badge-accent2{border-color:var(--accent2);color:#8a3210;background:rgba(255,107,53,.1);}
  .badge-dark{background:var(--ink);color:#fff;border-color:var(--ink);}
  .badge-live{padding-left:9px;}
  .badge-live .pulse{
    width:7px;height:7px;border-radius:50%;background:var(--accent2);
    animation:pulse 1.6s infinite;
  }
  @keyframes pulse{
    0%{box-shadow:0 0 0 0 rgba(255,107,53,.5);}
    70%{box-shadow:0 0 0 7px rgba(255,107,53,0);}
    100%{box-shadow:0 0 0 0 rgba(255,107,53,0);}
  }

  /* ============ 数据看板 ============ */
  .metric-grid{
    display:grid;
    grid-template-columns:repeat(2,minmax(0,1fr));
    gap:14px;
    margin-bottom:30px;
  }
  @media (min-width:768px){.metric-grid{grid-template-columns:repeat(4,minmax(0,1fr));}}
  .metric{
    padding:18px;
    border-radius:var(--r-md);
    border:1px solid var(--line);
    background:var(--paper);
  }
  .metric b{display:block;font-size:clamp(1.3rem,2.2vw,1.75rem);font-weight:800;letter-spacing:-.02em;margin-bottom:4px;}
  .metric span{font-size:12.5px;color:var(--muted);}

  .progress-group{display:flex;flex-direction:column;gap:20px;}
  .progress-row{display:flex;flex-direction:column;gap:9px;}
  .progress-meta{display:flex;align-items:baseline;justify-content:space-between;gap:12px;}
  .progress-meta span{font-size:14px;font-weight:600;}
  .progress-meta b{font-size:14px;font-weight:700;color:var(--muted);}
  .progress-track{
    position:relative;
    height:8px;
    border-radius:var(--r-pill);
    background:var(--line);
    overflow:visible;
  }
  .progress-fill{
    position:absolute;
    left:0;top:0;bottom:0;
    border-radius:var(--r-pill);
    background:linear-gradient(90deg,var(--accent),var(--accent2));
    width:0;
    transition:width .9s var(--ease);
  }
  .progress-fill::after{
    content:"";
    position:absolute;
    right:-1px;top:50%;
    width:11px;height:11px;
    border-radius:50%;
    background:var(--accent2);
    transform:translateY(-50%);
    box-shadow:0 0 0 4px rgba(255,107,53,.16);
  }

  /* ============ 设备/场景卡片 ============ */
  .device-grid{
    display:grid;
    grid-template-columns:1fr;
    gap:20px;
  }
  @media (min-width:900px){
    .device-grid{grid-template-columns:minmax(0,7fr) minmax(0,5fr);}
  }
  .card{
    background:var(--surface);
    border:1px solid var(--line);
    border-radius:var(--r-md);
    overflow:hidden;
    box-shadow:var(--sh-1);
    transition:transform .22s var(--ease),box-shadow .22s var(--ease),border-color .22s var(--ease);
    display:flex;
    flex-direction:column;
    height:100%;
  }
  .card:hover{transform:translateY(-4px);box-shadow:var(--sh-2);border-color:#d8dad2;}
  .card-media{position:relative;aspect-ratio:16/9;overflow:hidden;background:var(--paper);}
  .card-media img{width:100%;height:100%;object-fit:cover;transition:transform .5s var(--ease);}
  .card:hover .card-media img{transform:scale(1.04);}
  .card-body{padding:20px;display:flex;flex-direction:column;gap:10px;flex:1;}
  .card-title{font-size:16.5px;font-weight:700;}
  .card-text{font-size:14px;color:var(--muted);line-height:1.85;}
  .stack-col{display:grid;grid-template-rows:1fr 1fr;gap:20px;}
  .stack-col .card-media{aspect-ratio:16/9;}

  .tag-row{display:flex;flex-wrap:wrap;gap:8px;margin-top:auto;padding-top:6px;}
  .tag{
    display:inline-flex;
    align-items:center;
    padding:5px 12px;
    border-radius:var(--r-pill);
    font-size:12.5px;
    font-weight:600;
    color:var(--muted);
    background:var(--paper);
    border:1px solid var(--line);
  }

  /* ============ 步骤时间线 ============ */
  .step-list{
    display:grid;
    grid-template-columns:1fr;
    gap:0;
    border-top:1px solid var(--line);
  }
  @media (min-width:900px){
    .step-list{grid-template-columns:repeat(4,minmax(0,1fr));}
  }
  .step-item{
    position:relative;
    padding:26px 22px 26px 0;
    border-bottom:1px solid var(--line);
  }
  @media (min-width:900px){
    .step-item{padding:30px 22px 0 0;border-bottom:0;}
    .step-item::after{
      content:"";
      position:absolute;
      right:0;top:38px;bottom:14px;
      width:1px;background:var(--line);
    }
    .step-item:last-child::after{display:none;}
  }
  .step-num{
    display:block;
    font-size:44px;
    font-weight:800;
    letter-spacing:-.04em;
    line-height:1;
    color:transparent;
    -webkit-text-stroke:1.5px #C7CAC0;
    margin-bottom:14px;
  }
  .step-item h4{font-size:16px;font-weight:700;margin-bottom:8px;}
  .step-item p{font-size:14px;color:var(--muted);line-height:1.85;}

  /* ============ FAQ ============ */
  .faq-list{border-top:1px solid var(--line);}
  .faq-item{border-bottom:1px solid var(--line);}
  .faq-q{
    width:100%;
    display:flex;
    align-items:center;
    justify-content:space-between;
    gap:18px;
    padding:22px 4px;
    text-align:left;
    font-size:17px;
    font-weight:600;
    transition:color .2s var(--ease);
  }
  .faq-q:hover{color:#3a4038;}
  .faq-icon{
    flex:0 0 auto;
    width:26px;height:26px;
    border-radius:50%;
    border:1px solid var(--line);
    display:flex;align-items:center;justify-content:center;
    transition:transform .2s var(--ease),background .2s var(--ease),border-color .2s var(--ease);
  }
  .faq-icon svg{width:12px;height:12px;}
  .faq-item.is-open .faq-icon{transform:rotate(45deg);background:var(--accent);border-color:var(--accent);}
  .faq-a{
    max-height:0;
    overflow:hidden;
    transition:max-height .3s var(--ease);
  }
  .faq-a p{
    padding:0 46px 24px 4px;
    font-size:15px;
    color:var(--muted);
    line-height:1.9;
  }

  /* ============ CTA ============ */
  .cta-band{
    background:var(--ink);
    border-radius:24px;
    padding:36px 28px;
    display:flex;
    flex-direction:column;
    gap:22px;
    color:#fff;
    position:relative;
    overflow:hidden;
  }
  @media (min-width:900px){
    .cta-band{flex-direction:row;align-items:center;justify-content:space-between;padding:44px 48px;}
  }
  .cta-band::before{
    content:"";
    position:absolute;
    right:-80px;top:-90px;
    width:280px;height:280px;
    border-radius:50%;
    border:1px solid rgba(201,242,77,.25);
  }
  .cta-band h2{font-size:clamp(1.35rem,2.2vw,1.9rem);font-weight:700;margin-bottom:10px;position:relative;}
  .cta-band p{font-size:14.5px;color:rgba(255,255,255,.7);line-height:1.85;max-width:560px;position:relative;}
  .cta-actions{display:flex;flex-wrap:wrap;gap:12px;position:relative;}

  /* ============ 页脚 ============ */
  .site-footer{
    background:var(--ink);
    color:#fff;
    padding:64px 0 28px;
    margin-top:24px;
  }
  .footer-grid{
    display:grid;
    grid-template-columns:1fr;
    gap:36px;
    padding-bottom:40px;
    border-bottom:1px solid rgba(255,255,255,.12);
  }
  @media (min-width:768px){.footer-grid{grid-template-columns:repeat(2,minmax(0,1fr));}}
  @media (min-width:1024px){.footer-grid{grid-template-columns:1.4fr 1fr 1fr 1fr;gap:32px;}}
  .footer-brand .brand{padding:0;margin-bottom:16px;}
  .footer-desc{font-size:14px;color:rgba(255,255,255,.62);line-height:1.9;max-width:340px;}
  .footer-title{font-size:14px;font-weight:700;margin-bottom:16px;color:#fff;}
  .footer-links{display:flex;flex-direction:column;gap:11px;}
  .footer-links a{font-size:14px;color:rgba(255,255,255,.66);transition:color .2s var(--ease);}
  .footer-links a:hover{color:var(--accent);}
  .footer-bottom{
    display:flex;
    flex-direction:column;
    gap:8px;
    padding-top:22px;
    font-size:13.5px;
    color:rgba(255,255,255,.5);
  }
  @media (min-width:768px){
    .footer-bottom{flex-direction:row;align-items:center;justify-content:space-between;}
  }

  /* ============ 动效 ============ */
  .reveal{opacity:0;transform:translateY(12px);transition:opacity .3s var(--ease),transform .3s var(--ease);}
  .reveal.is-visible{opacity:1;transform:none;}
  @media (prefers-reduced-motion:reduce){
    *{animation:none !important;transition:none !important;}
    .reveal{opacity:1;transform:none;}
    html{scroll-behavior:auto;}
  }

/* roulang page: category2 */
:root {
    --ink: #0B0D0C;
    --ink2: #171B19;
    --paper: #F5F5F1;
    --surface: #FFFFFF;
    --line: #E4E5DF;
    --muted: #6E7671;
    --accent: #C9F24D;
    --accent2: #FF6B35;
    --r-s: 8px;
    --r-m: 14px;
    --r-l: 20px;
    --pill: 999px;
    --sh-s: 0 1px 2px rgba(11, 13, 12, .04);
    --sh-h: 0 12px 32px rgba(11, 13, 12, .10);
    --container: 1200px;
  }

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

  html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }

  body {
    margin: 0;
    background: var(--paper);
    color: var(--ink);
    font-family: 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', 'Source Han Sans SC', 'Inter', 'Helvetica Neue', Arial, sans-serif;
    font-size: 16px;
    line-height: 1.7;
    letter-spacing: .01em;
    -webkit-font-smoothing: antialiased;
  }

  img { max-width: 100%; display: block; }
  a { color: inherit; text-decoration: none; }
  button { font: inherit; color: inherit; }

  h1, h2, h3, h4 { margin: 0; letter-spacing: -.02em; line-height: 1.18; }
  h1 { font-size: clamp(1.9rem, 4.4vw, 3.4rem); font-weight: 800; }
  h2 { font-size: clamp(1.5rem, 2.6vw, 2.25rem); font-weight: 700; }
  h3 { font-size: 1.15rem; font-weight: 600; }
  p { margin: 0; }

  ::selection { background: var(--accent); color: var(--ink); }

  :focus-visible { outline: 2px solid var(--ink); outline-offset: 2px; border-radius: 4px; }

  .container {
    width: 100%;
    max-width: var(--container);
    margin: 0 auto;
    padding: 0 20px;
  }

  .num { font-variant-numeric: tabular-nums; font-feature-settings: "tnum" 1; }

  /* ---------- 悬浮胶囊导航 ---------- */
  .site-header {
    position: sticky;
    top: 0;
    z-index: 80;
    padding: 16px 0 0;
  }

  .capsule-nav {
    position: relative;
    z-index: 80;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 20px;
    padding: 10px 12px 10px 18px;
    border-radius: var(--pill);
    background: rgba(255, 255, 255, .84);
    border: 1px solid var(--line);
    box-shadow: var(--sh-s);
    backdrop-filter: blur(14px);
    -webkit-backdrop-filter: blur(14px);
    transition: background .22s ease-out, box-shadow .22s ease-out;
  }

  .capsule-nav.is-scrolled {
    background: rgba(255, 255, 255, .96);
    box-shadow: 0 10px 28px rgba(11, 13, 12, .10);
  }

  .brand {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    font-weight: 800;
    font-size: 16px;
    letter-spacing: -.01em;
    white-space: nowrap;
  }

  .brand-mark {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 34px;
    height: 34px;
    border-radius: var(--pill);
    background: var(--ink);
    color: var(--accent);
    flex: none;
  }

  .nav-links {
    display: flex;
    align-items: center;
    gap: 6px;
  }

  .nav-link {
    position: relative;
    padding: 8px 14px;
    font-size: 14.5px;
    font-weight: 500;
    color: #34403A;
    border-radius: var(--pill);
    transition: color .18s ease-out, background .18s ease-out;
    white-space: nowrap;
  }

  .nav-link::after {
    content: "";
    position: absolute;
    left: 14px;
    right: 14px;
    bottom: 3px;
    height: 2px;
    background: var(--accent);
    transform: scaleX(0);
    transform-origin: left;
    transition: transform .2s ease-out;
    border-radius: 2px;
  }

  .nav-link:hover { color: var(--ink); }
  .nav-link:hover::after { transform: scaleX(1); }

  .nav-link.is-active {
    color: var(--ink);
    font-weight: 700;
    background: rgba(11, 13, 12, .05);
  }

  .nav-link.is-active::after { transform: scaleX(1); }

  .nav-actions { display: flex; align-items: center; gap: 8px; }

  .nav-toggle {
    display: none;
    width: 42px;
    height: 42px;
    border: 1px solid var(--line);
    background: var(--surface);
    border-radius: var(--pill);
    align-items: center;
    justify-content: center;
    cursor: pointer;
  }

  .nav-toggle span {
    display: block;
    width: 16px;
    height: 2px;
    background: var(--ink);
    border-radius: 2px;
    position: relative;
  }

  .nav-toggle span::before,
  .nav-toggle span::after {
    content: "";
    position: absolute;
    left: 0;
    width: 16px;
    height: 2px;
    background: var(--ink);
    border-radius: 2px;
  }

  .nav-toggle span::before { top: -5px; }
  .nav-toggle span::after { top: 5px; }

  /* ---------- 按钮 ---------- */
  .btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    border-radius: var(--pill);
    padding: 14px 28px;
    font-size: 15px;
    font-weight: 700;
    border: 1px solid transparent;
    cursor: pointer;
    transition: transform .18s ease-out, background .18s ease-out, filter .18s ease-out, border-color .18s ease-out, color .18s ease-out;
    letter-spacing: .01em;
  }

  .btn:active { transform: scale(.98); }

  .btn-primary { background: var(--accent); color: var(--ink); }
  .btn-primary:hover { filter: brightness(1.06); transform: translateY(-2px); }

  .btn-ghost {
    background: transparent;
    border-color: rgba(255, 255, 255, .38);
    color: #fff;
  }
  .btn-ghost:hover { background: rgba(255, 255, 255, .10); }

  .btn-outline {
    background: transparent;
    border-color: var(--line);
    color: var(--ink);
  }
  .btn-outline:hover { background: rgba(11, 13, 12, .05); }

  .btn-sm { padding: 10px 20px; font-size: 14px; }
  .btn-block { width: 100%; }

  /* ---------- 分类横幅 ---------- */
  .page-hero {
    position: relative;
    margin-top: -66px;
    padding: 148px 0 76px;
    overflow: hidden;
    background: var(--ink);
    color: #fff;
  }

  .page-hero-img {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: center 30%;
    opacity: .42;
  }

  .page-hero::after {
    content: "";
    position: absolute;
    inset: 0;
    background:
      linear-gradient(180deg, rgba(11, 13, 12, .82) 0%, rgba(11, 13, 12, .68) 45%, rgba(11, 13, 12, .94) 100%),
      repeating-linear-gradient(90deg, rgba(255, 255, 255, .05) 0 1px, transparent 1px 64px),
      repeating-linear-gradient(0deg, rgba(255, 255, 255, .05) 0 1px, transparent 1px 64px);
    pointer-events: none;
  }

  .page-hero-inner { position: relative; z-index: 2; max-width: 860px; }

  .breadcrumb {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 13px;
    color: rgba(255, 255, 255, .62);
    margin-bottom: 22px;
  }

  .breadcrumb a { color: rgba(255, 255, 255, .72); transition: color .18s ease-out; }
  .breadcrumb a:hover { color: var(--accent); }
  .breadcrumb .current { color: #fff; }

  .banner-chip {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 6px 14px;
    border-radius: var(--pill);
    border: 1px solid rgba(201, 242, 77, .55);
    color: var(--accent);
    font-size: 12.5px;
    font-weight: 600;
    letter-spacing: .08em;
    margin-bottom: 20px;
  }

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

  .page-hero h1 { color: #fff; max-width: 900px; }

  .page-hero-lead {
    margin-top: 20px;
    max-width: 640px;
    font-size: 17px;
    line-height: 1.8;
    color: rgba(255, 255, 255, .76);
  }

  .hero-actions {
    margin-top: 32px;
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
  }

  .hero-stats {
    margin-top: 44px;
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 20px;
    border-top: 1px solid rgba(255, 255, 255, .16);
    padding-top: 26px;
  }

  .hero-stat b {
    display: block;
    font-size: 26px;
    font-weight: 800;
    color: var(--accent);
    font-variant-numeric: tabular-nums;
  }

  .hero-stat span {
    display: block;
    margin-top: 4px;
    font-size: 13px;
    color: rgba(255, 255, 255, .62);
  }

  /* ---------- 通用板块 ---------- */
  .section { padding: 96px 0; }
  .section-tight { padding: 72px 0; }
  .section-dark { background: var(--ink); color: #fff; }

  .section-head { max-width: 720px; margin-bottom: 44px; }

  .eyebrow {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    font-size: 12.5px;
    font-weight: 700;
    letter-spacing: .14em;
    color: var(--muted);
    margin-bottom: 14px;
  }

  .eyebrow::before {
    content: "";
    width: 22px;
    height: 2px;
    background: var(--accent2);
    border-radius: 2px;
  }

  .section-dark .eyebrow { color: rgba(255, 255, 255, .6); }

  .section-desc {
    margin-top: 16px;
    font-size: 16px;
    color: var(--muted);
    line-height: 1.85;
  }

  .section-dark .section-desc { color: rgba(255, 255, 255, .68); }

  /* ---------- 分段切换 ---------- */
  .tabs {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    padding: 8px;
    border-radius: var(--pill);
    background: rgba(11, 13, 12, .05);
    border: 1px solid var(--line);
    width: fit-content;
    max-width: 100%;
    margin-bottom: 36px;
    overflow-x: auto;
  }

  .tab {
    border: 0;
    background: transparent;
    border-radius: var(--pill);
    padding: 10px 20px;
    font-size: 14.5px;
    font-weight: 600;
    color: var(--muted);
    cursor: pointer;
    white-space: nowrap;
    transition: background .18s ease-out, color .18s ease-out, box-shadow .18s ease-out;
  }

  .tab:hover { color: var(--ink); }

  .tab.is-active {
    background: var(--surface);
    color: var(--ink);
    box-shadow: var(--sh-s);
  }

  /* ---------- 卡片网格 ---------- */
  .card-grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 24px;
  }

  .track-card {
    display: flex;
    flex-direction: column;
    background: var(--surface);
    border: 1px solid var(--line);
    border-radius: var(--r-l);
    overflow: hidden;
    box-shadow: var(--sh-s);
    transition: transform .2s ease-out, box-shadow .2s ease-out, border-color .2s ease-out;
  }

  .track-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--sh-h);
    border-color: rgba(11, 13, 12, .16);
  }

  .track-card.is-hidden { display: none; }

  .card-media {
    position: relative;
    aspect-ratio: 4 / 3;
    overflow: hidden;
    background: var(--paper);
  }

  .card-media img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform .3s ease-out;
  }

  .track-card:hover .card-media img { transform: scale(1.04); }

  .rarity {
    position: absolute;
    top: 12px;
    left: 12px;
    padding: 5px 12px;
    font-size: 12px;
    font-weight: 600;
    border-radius: var(--pill);
    background: rgba(11, 13, 12, .72);
    color: #fff;
    border: 1px solid rgba(255, 255, 255, .28);
    backdrop-filter: blur(6px);
  }

  .rarity-accent { border-color: var(--accent); color: var(--accent); }
  .rarity-warm { border-color: var(--accent2); color: var(--accent2); }

  .card-body { padding: 22px; display: flex; flex-direction: column; gap: 12px; flex: 1; }

  .card-meta {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 12.5px;
    color: var(--muted);
  }

  .tag {
    display: inline-flex;
    align-items: center;
    padding: 3px 10px;
    border-radius: var(--pill);
    border: 1px solid var(--line);
    font-size: 12px;
    font-weight: 600;
    color: var(--ink);
    background: var(--paper);
  }

  .tag-accent { border-color: rgba(201, 242, 77, .9); background: rgba(201, 242, 77, .22); }
  .tag-warm { border-color: rgba(255, 107, 53, .55); color: #B2400F; background: rgba(255, 107, 53, .10); }

  .card-body p { font-size: 14.5px; color: var(--muted); line-height: 1.75; }

  .card-link {
    margin-top: auto;
    display: inline-flex;
    align-items: center;
    gap: 6px;
    font-size: 14px;
    font-weight: 700;
    color: var(--ink);
    border-bottom: 2px solid transparent;
    width: fit-content;
    transition: border-color .18s ease-out, color .18s ease-out;
  }

  .card-link:hover { border-color: var(--accent); }

  .empty-note {
    grid-column: 1 / -1;
    text-align: center;
    padding: 56px 20px;
    border: 1px dashed var(--line);
    border-radius: var(--r-l);
    color: var(--muted);
    background: var(--surface);
  }

  .empty-note p { margin-bottom: 16px; }

  /* ---------- 规则要点（非对称双栏） ---------- */
  .split {
    display: grid;
    grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
    gap: 48px;
    align-items: start;
  }

  .rules-list {
    display: grid;
    gap: 14px;
  }

  .rule-item {
    display: grid;
    grid-template-columns: 52px minmax(0, 1fr);
    gap: 18px;
    padding: 22px;
    background: var(--surface);
    border: 1px solid var(--line);
    border-radius: var(--r-m);
    transition: transform .2s ease-out, box-shadow .2s ease-out;
  }

  .rule-item:hover { transform: translateY(-3px); box-shadow: var(--sh-h); }

  .rule-index {
    font-size: 22px;
    font-weight: 800;
    color: var(--ink);
    font-variant-numeric: tabular-nums;
    border-right: 1px solid var(--line);
    padding-right: 12px;
  }

  .rule-item h3 { margin-bottom: 6px; }
  .rule-item p { font-size: 14.5px; color: var(--muted); }

  .note-box {
    margin-top: 22px;
    padding: 20px 22px;
    border-radius: var(--r-m);
    background: rgba(201, 242, 77, .22);
    border: 1px solid rgba(201, 242, 77, .8);
    font-size: 14.5px;
    line-height: 1.75;
  }

  /* ---------- 步骤时间线 ---------- */
  .steps {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 0;
    border-top: 1px solid var(--line);
    margin-top: 8px;
  }

  .step {
    position: relative;
    padding: 28px 24px 0 0;
  }

  .step::before {
    content: "";
    position: absolute;
    top: -5px;
    left: 0;
    width: 9px;
    height: 9px;
    border-radius: 50%;
    background: var(--surface);
    border: 2px solid var(--ink);
  }

  .step:last-child::before { border-color: var(--accent2); background: var(--accent2); }

  .step-num {
    font-size: 40px;
    font-weight: 800;
    line-height: 1;
    color: transparent;
    -webkit-text-stroke: 1.5px rgba(11, 13, 12, .32);
    font-variant-numeric: tabular-nums;
  }

  .step h3 { margin: 14px 0 8px; font-size: 1.05rem; }
  .step p { font-size: 14px; color: var(--muted); line-height: 1.75; }

  /* ---------- 数据带 ---------- */
  .metric-band {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 24px;
    border: 1px solid rgba(255, 255, 255, .14);
    border-radius: var(--r-l);
    padding: 36px;
    background: rgba(255, 255, 255, .03);
  }

  .metric b {
    display: block;
    font-size: 32px;
    font-weight: 800;
    color: var(--accent);
    font-variant-numeric: tabular-nums;
  }

  .metric span {
    display: block;
    margin-top: 6px;
    font-size: 13.5px;
    color: rgba(255, 255, 255, .66);
  }

  /* ---------- 提示条 ---------- */
  .notice {
    display: flex;
    align-items: flex-start;
    gap: 14px;
    padding: 18px 22px;
    border-radius: var(--r-m);
    background: var(--surface);
    border: 1px solid var(--line);
    border-left: 3px solid var(--accent2);
    font-size: 14.5px;
    color: var(--muted);
    line-height: 1.75;
  }

  /* ---------- FAQ ---------- */
  .faq-list { border-top: 1px solid var(--line); margin-top: 8px; }

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

  .faq-q {
    width: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 20px;
    padding: 22px 0;
    background: none;
    border: 0;
    text-align: left;
    font-size: 17px;
    font-weight: 600;
    cursor: pointer;
  }

  .faq-icon {
    flex: none;
    width: 26px;
    height: 26px;
    border-radius: 50%;
    border: 1px solid var(--line);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    color: var(--muted);
    transition: transform .2s ease-out, color .2s ease-out, border-color .2s ease-out;
  }

  .faq-item.is-open .faq-icon {
    transform: rotate(45deg);
    color: var(--ink);
    border-color: var(--ink);
  }

  .faq-a {
    max-height: 0;
    overflow: hidden;
    transition: max-height .28s ease-out;
  }

  .faq-item.is-open .faq-a { max-height: 360px; }

  .faq-a p {
    padding: 0 0 22px;
    max-width: 820px;
    font-size: 15px;
    color: var(--muted);
    line-height: 1.85;
  }

  /* ---------- CTA 收口 ---------- */
  .cta-band {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 36px;
    background: var(--ink);
    color: #fff;
    border-radius: 24px;
    padding: 48px;
    position: relative;
    overflow: hidden;
  }

  .cta-band::after {
    content: "";
    position: absolute;
    right: -80px;
    top: -80px;
    width: 260px;
    height: 260px;
    border-radius: 50%;
    border: 1px solid rgba(201, 242, 77, .3);
    pointer-events: none;
  }

  .cta-band h2 { max-width: 620px; }
  .cta-band p { margin-top: 14px; color: rgba(255, 255, 255, .68); max-width: 560px; font-size: 15px; }
  .cta-actions { display: flex; gap: 12px; flex-wrap: wrap; position: relative; z-index: 2; }

  /* ---------- 页脚 ---------- */
  .site-footer {
    background: var(--ink);
    color: rgba(255, 255, 255, .74);
    padding: 72px 0 32px;
    margin-top: 96px;
    font-size: 14px;
  }

  .footer-grid {
    display: grid;
    grid-template-columns: 1.5fr 1fr 1fr 1fr;
    gap: 40px;
  }

  .footer-brand .brand { color: #fff; }
  .footer-brand .brand-mark { background: var(--accent); color: var(--ink); }

  .footer-desc {
    margin-top: 18px;
    max-width: 340px;
    color: rgba(255, 255, 255, .62);
    line-height: 1.8;
    font-size: 14px;
  }

  .footer-title {
    font-size: 14px;
    font-weight: 700;
    color: #fff;
    margin-bottom: 16px;
    letter-spacing: .02em;
  }

  .footer-links { display: grid; gap: 10px; }

  .footer-links a {
    color: rgba(255, 255, 255, .66);
    transition: color .18s ease-out;
    font-size: 14px;
  }

  .footer-links a:hover { color: var(--accent); }

  .footer-bottom {
    margin-top: 56px;
    padding-top: 24px;
    border-top: 1px solid rgba(255, 255, 255, .12);
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    flex-wrap: wrap;
    font-size: 13px;
    color: rgba(255, 255, 255, .5);
  }

  /* ---------- 响应式 ---------- */
  @media (min-width: 1440px) {
    .container { padding: 0 40px; }
  }

  @media (max-width: 1023px) {
    .card-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
    .split { grid-template-columns: minmax(0, 1fr); gap: 32px; }
    .steps { grid-template-columns: repeat(2, minmax(0, 1fr)); row-gap: 36px; }
    .metric-band { grid-template-columns: repeat(2, minmax(0, 1fr)); }
    .footer-grid { grid-template-columns: 1fr 1fr; gap: 32px; }
  }

  @media (max-width: 900px) {
    .nav-links {
      position: fixed;
      inset: 0;
      z-index: 70;
      flex-direction: column;
      align-items: flex-start;
      justify-content: center;
      gap: 6px;
      padding: 100px 32px 48px;
      background: rgba(11, 13, 12, .96);
      opacity: 0;
      pointer-events: none;
      transform: translateY(-10px);
      transition: opacity .25s ease-out, transform .25s ease-out;
    }

    .nav-links.is-open { opacity: 1; pointer-events: auto; transform: none; }

    .nav-link { color: #fff; font-size: 20px; font-weight: 600; padding: 12px 4px; }
    .nav-link.is-active { background: rgba(255, 255, 255, .08); padding: 12px 16px; }
    .nav-link::after { display: none; }

    .nav-toggle { display: inline-flex; }
    .nav-actions .btn { display: none; }

    .page-hero { padding: 132px 0 60px; }
    .section { padding: 68px 0; }
    .cta-band { flex-direction: column; align-items: flex-start; padding: 34px 26px; }
    .hero-stats { grid-template-columns: repeat(2, minmax(0, 1fr)); row-gap: 22px; }
  }

  @media (max-width: 640px) {
    .container { padding: 0 20px; }
    .card-grid { grid-template-columns: minmax(0, 1fr); gap: 18px; }
    .steps { grid-template-columns: minmax(0, 1fr); }
    .metric-band { grid-template-columns: minmax(0, 1fr); padding: 26px; }
    .footer-grid { grid-template-columns: minmax(0, 1fr); }
    .rule-item { grid-template-columns: 42px minmax(0, 1fr); gap: 14px; padding: 18px; }
    .brand-text { font-size: 15px; }
    .tabs { margin-bottom: 26px; }
  }

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

/* roulang page: article */
:root{
  --ink:#0B0D0C;
  --ink2:#171B19;
  --paper:#F5F5F1;
  --surface:#FFFFFF;
  --line:#E4E5DF;
  --muted:#6E7671;
  --accent:#C9F24D;
  --accent2:#FF6B35;
  --r-sm:8px;
  --r-md:14px;
  --r-lg:20px;
  --r-pill:999px;
  --shadow-1:0 1px 2px rgba(11,13,12,.04);
  --shadow-2:0 12px 32px rgba(11,13,12,.10);
  --container:1200px;
  --font-sans:"Inter","PingFang SC","Hiragino Sans GB","Microsoft YaHei","Source Han Sans SC",system-ui,-apple-system,sans-serif;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  font-family:var(--font-sans);
  background:var(--paper);
  color:var(--ink);
  font-size:16px;
  line-height:1.7;
  letter-spacing:.01em;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer}
p{margin:0}
::selection{background:var(--accent);color:var(--ink)}
:focus-visible{outline:2px solid var(--ink);outline-offset:2px;border-radius:4px}
.num{font-variant-numeric:tabular-nums;font-feature-settings:"tnum"}
.container{width:100%;max-width:var(--container);margin:0 auto;padding:0 20px}
@media (min-width:768px){.container{padding:0 24px}}
@media (min-width:1024px){.container{padding:0 32px}}
@media (min-width:1440px){.container{padding:0 48px}}

/* ---------- 顶部胶囊导航 ---------- */
.site-header{position:sticky;top:12px;z-index:60;padding:0 12px}
@media (min-width:768px){.site-header{top:16px;padding:0 24px}}
.nav-shell{
  max-width:var(--container);
  margin:0 auto;
  display:flex;
  align-items:center;
  gap:14px;
  padding:9px 14px;
  border:1px solid var(--line);
  border-radius:var(--r-pill);
  background:rgba(255,255,255,.76);
  backdrop-filter:blur(12px);
  -webkit-backdrop-filter:blur(12px);
  box-shadow:var(--shadow-1);
  transition:background .22s ease,box-shadow .22s ease,border-color .22s ease;
}
.site-header.is-scrolled .nav-shell{
  background:rgba(255,255,255,.94);
  border-color:rgba(11,13,12,.10);
  box-shadow:0 10px 28px rgba(11,13,12,.10);
}
.brand{display:flex;align-items:center;gap:10px;font-weight:800;letter-spacing:-.02em;white-space:nowrap}
.brand-mark{
  display:grid;place-items:center;width:32px;height:32px;flex:none;
  border-radius:var(--r-pill);background:var(--ink);color:var(--accent);
}
.brand-text{font-size:16px;line-height:1}
.nav-links{display:none;align-items:center;gap:2px;margin-left:auto}
@media (min-width:1024px){.nav-links{display:flex}}
.nav-link{position:relative;padding:9px 12px;border-radius:var(--r-pill);font-size:15px;color:#2c322e;transition:color .2s ease}
.nav-link::after{
  content:"";position:absolute;left:12px;right:12px;bottom:4px;height:2px;
  background:var(--accent);border-radius:2px;transform:scaleX(0);transform-origin:left;
  transition:transform .2s ease;
}
.nav-link:hover{color:var(--ink)}
.nav-link:hover::after,.nav-link.is-active::after{transform:scaleX(1)}
.nav-link.is-active{color:var(--ink);font-weight:700}
.nav-actions{display:flex;align-items:center;gap:8px;margin-left:auto}
@media (min-width:1024px){.nav-actions{margin-left:0}}
.nav-toggle{
  display:grid;place-items:center;width:40px;height:40px;flex:none;
  border-radius:var(--r-pill);border:1px solid var(--line);background:rgba(255,255,255,.62);
}
@media (min-width:1024px){.nav-toggle{display:none}}
.nav-toggle i{display:block;width:16px;height:2px;background:var(--ink);border-radius:2px;transition:transform .2s ease,opacity .2s ease}
.nav-toggle i + i{margin-top:4px}
.nav-toggle[aria-expanded="true"] i:nth-child(1){transform:translateY(6px) rotate(45deg)}
.nav-toggle[aria-expanded="true"] i:nth-child(2){opacity:0}
.nav-toggle[aria-expanded="true"] i:nth-child(3){transform:translateY(-6px) rotate(-45deg)}

.mobile-menu{
  position:fixed;inset:0;z-index:70;display:flex;flex-direction:column;
  padding:22px;background:rgba(11,13,12,.96);color:#fff;
  opacity:0;visibility:hidden;transition:opacity .25s ease,visibility .25s ease;
}
.mobile-menu.is-open{opacity:1;visibility:visible}
.mobile-menu .mobile-top{display:flex;align-items:center;justify-content:space-between;padding-bottom:18px;border-bottom:1px solid rgba(255,255,255,.14)}
.mobile-menu .brand-text{color:#fff}
.mobile-menu .brand-mark{background:var(--accent);color:var(--ink)}
.mobile-close{width:40px;height:40px;border-radius:var(--r-pill);border:1px solid rgba(255,255,255,.2);display:grid;place-items:center;color:#fff}
.mobile-links{display:flex;flex-direction:column;gap:4px;padding:22px 0;flex:1;overflow-y:auto}
.mobile-links a{
  font-size:20px;font-weight:600;padding:14px 4px;border-bottom:1px solid rgba(255,255,255,.08);
  color:rgba(255,255,255,.86);transition:color .2s ease
}
.mobile-links a:hover,.mobile-links a.is-active{color:var(--accent)}
.mobile-menu .btn{width:100%}

/* ---------- 按钮 / 标签 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  border-radius:var(--r-pill);border:1px solid transparent;
  font-weight:700;font-size:15px;line-height:1;padding:14px 28px;
  transition:transform .2s ease,background .2s ease,color .2s ease,box-shadow .2s ease,filter .2s ease;
}
.btn:active{transform:scale(.98)}
.btn-primary{background:var(--accent);color:var(--ink)}
.btn-primary:hover{filter:brightness(1.06);transform:translateY(-2px);box-shadow:0 10px 24px rgba(201,242,77,.34)}
.btn-ghost{background:transparent;border-color:var(--line);color:var(--ink)}
.btn-ghost:hover{background:rgba(11,13,12,.05)}
.btn-dark{background:var(--ink);color:#fff}
.btn-dark:hover{background:#202623;transform:translateY(-2px)}
.btn-on-dark{background:transparent;border-color:rgba(255,255,255,.28);color:#fff}
.btn-on-dark:hover{background:rgba(255,255,255,.10)}
.btn-sm{padding:10px 18px;font-size:14px}

.tag{
  display:inline-flex;align-items:center;gap:6px;
  padding:6px 14px;border-radius:var(--r-pill);
  border:1px solid var(--line);background:var(--surface);
  font-size:13px;font-weight:600;color:#2c322e;
  transition:border-color .2s ease,color .2s ease,transform .2s ease;
}
.tag:hover{border-color:var(--accent);color:var(--ink);transform:translateY(-2px)}
.tag.is-accent{border-color:var(--accent);color:var(--ink);background:rgba(201,242,77,.24)}

/* ---------- 文章头部 ---------- */
.article-hero{position:relative;overflow:hidden;padding:120px 0 48px;background:var(--paper)}
.article-hero .hero-bg{
  position:absolute;inset:0;
  background-image:url('/assets/images/backpic/back-1.webp');
  background-size:cover;background-position:center 30%;
  opacity:.16;
  filter:grayscale(.25);
}
.article-hero .hero-grid{
  position:absolute;inset:0;
  background-image:linear-gradient(rgba(11,13,12,.05) 1px,transparent 1px),linear-gradient(90deg,rgba(11,13,12,.05) 1px,transparent 1px);
  background-size:64px 64px;
  opacity:.6;
}
.article-hero .hero-mask{
  position:absolute;inset:0;
  background:linear-gradient(180deg,rgba(245,245,241,.72) 0%,rgba(245,245,241,.94) 58%,var(--paper) 100%);
}
.article-hero .container{position:relative;z-index:2}
.breadcrumb{
  display:flex;flex-wrap:wrap;align-items:center;gap:8px;
  font-size:13px;color:var(--muted);margin-bottom:22px;
}
.breadcrumb a{color:var(--muted);transition:color .2s ease}
.breadcrumb a:hover{color:var(--ink)}
.breadcrumb .sep{color:rgba(11,13,12,.24)}
.breadcrumb .current{color:var(--ink);font-weight:600;max-width:min(560px,60vw);overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.article-title{
  max-width:880px;
  margin:0;
  font-size:clamp(1.75rem,3vw,2.5rem);
  font-weight:800;
  line-height:1.2;
  letter-spacing:-.02em;
}
.article-meta{
  margin-top:24px;display:flex;flex-wrap:wrap;align-items:center;gap:10px 18px;
  font-size:13px;color:var(--muted);
}
.meta-badge{
  display:inline-flex;align-items:center;gap:6px;
  padding:6px 14px;border-radius:var(--r-pill);
  background:var(--ink);color:#fff;font-weight:600;font-size:12px;letter-spacing:.02em;
}
.meta-dot{width:4px;height:4px;border-radius:50%;background:rgba(11,13,12,.22)}
.meta-link{margin-left:auto;font-weight:700;color:var(--ink);border-bottom:1px solid var(--accent);transition:background .2s ease}
.meta-link:hover{background:rgba(201,242,77,.4)}
@media (max-width:767px){.meta-link{margin-left:0}}

/* ---------- 正文 ---------- */
.section{padding:56px 0}
.section-sm{padding:36px 0}
@media (min-width:1024px){.section{padding:80px 0}.section-sm{padding:48px 0}}
.article-card{
  max-width:860px;margin:0 auto;
  background:var(--surface);
  border:1px solid var(--line);
  border-radius:var(--r-lg);
  box-shadow:var(--shadow-1);
  padding:34px 22px;
}
@media (min-width:768px){.article-card{padding:52px 56px}}
.article-body{
  max-width:760px;margin:0 auto;
  font-size:17px;line-height:1.85;color:#1d211f;
}
@media (min-width:1024px){.article-body{font-size:18px;line-height:1.9}}
.article-body > * + *{margin-top:1.4em}
.article-body h2{
  position:relative;
  margin:48px 0 0;
  padding-left:18px;
  font-size:clamp(1.3rem,2.1vw,1.6rem);
  font-weight:700;line-height:1.35;letter-spacing:-.01em;color:var(--ink);
}
.article-body h2::before{
  content:"";position:absolute;left:0;top:.2em;width:4px;height:20px;
  background:var(--accent);border-radius:2px;
}
.article-body h3{margin:32px 0 0;font-size:1.15rem;font-weight:600;line-height:1.4;color:var(--ink)}
.article-body h4{margin:26px 0 0;font-size:1rem;font-weight:700;color:var(--ink)}
.article-body p{margin:0}
.article-body ul,.article-body ol{margin:0;padding-left:1.35em;display:flex;flex-direction:column;gap:.5em}
.article-body ul{list-style:none;padding-left:1.15em}
.article-body ul li{position:relative}
.article-body ul li::before{
  content:"";position:absolute;left:-1.15em;top:.68em;width:7px;height:7px;
  background:var(--accent);border-radius:1px;
}
.article-body ol{list-style:decimal}
.article-body ol li::marker{color:var(--accent2);font-weight:700}
.article-body blockquote{
  margin:1.9em 0;padding:20px 22px;
  background:var(--paper);
  border-left:3px solid var(--accent);
  border-radius:0 var(--r-md) var(--r-md) 0;
  color:#3a403c;
}
.article-body blockquote p + p{margin-top:.8em}
.article-body img{max-width:100%;height:auto;border-radius:12px;margin:1.9em auto;box-shadow:var(--shadow-1)}
.article-body figure{margin:1.9em 0}
.article-body figcaption{margin-top:10px;text-align:center;font-size:13px;color:var(--muted)}
.article-body a{color:var(--ink);border-bottom:1px solid var(--accent);transition:background .2s ease}
.article-body a:hover{background:rgba(201,242,77,.38)}
.article-body strong{font-weight:700}
.article-body hr{border:0;border-top:1px solid var(--line);margin:40px 0}
.article-body table{width:100%;border-collapse:collapse;font-size:15px;margin:1.9em 0}
.article-body th,.article-body td{border:1px solid var(--line);padding:10px 12px;text-align:left}
.article-body th{background:var(--paper);font-weight:700}
.article-body tbody tr:nth-child(even){background:rgba(228,229,223,.34)}
.article-body code{
  background:var(--paper);border:1px solid var(--line);border-radius:6px;
  padding:2px 6px;font-size:.9em;
}
@media (max-width:639px){
  .article-body table{display:block;overflow-x:auto;white-space:nowrap;-webkit-overflow-scrolling:touch}
}

.empty-state{
  max-width:520px;margin:0 auto;padding:32px 12px;text-align:center;
}
.empty-state .empty-icon{
  width:56px;height:56px;margin:0 auto 18px;border-radius:var(--r-pill);
  border:1px solid var(--line);display:grid;place-items:center;color:var(--muted);
}
.empty-state h2{font-size:1.25rem;font-weight:700;margin:0 0 10px}
.empty-state p{color:var(--muted);font-size:15px;margin-bottom:20px}

/* ---------- 文末标签 / 推荐 ---------- */
.article-foot{
  max-width:860px;margin:28px auto 0;
  padding:22px 22px 4px;
  border-top:1px solid var(--line);
  display:flex;flex-wrap:wrap;align-items:center;gap:12px;
}
.article-foot .foot-label{font-size:13px;font-weight:700;color:var(--muted);letter-spacing:.06em}

.section-head{display:flex;flex-wrap:wrap;align-items:flex-end;justify-content:space-between;gap:14px;margin-bottom:28px}
.section-head h2{margin:0;font-size:clamp(1.4rem,2.4vw,2rem);font-weight:700;letter-spacing:-.02em;line-height:1.2}
.section-head p{margin:8px 0 0;font-size:15px;color:var(--muted)}
.head-link{font-size:14px;font-weight:700;color:var(--ink);border-bottom:1px solid var(--accent);transition:background .2s ease}
.head-link:hover{background:rgba(201,242,77,.4)}

.card-grid{display:grid;gap:20px;grid-template-columns:1fr}
@media (min-width:640px){.card-grid{grid-template-columns:repeat(2,1fr)}}
@media (min-width:1024px){.card-grid{grid-template-columns:repeat(3,1fr);gap:24px}}
.rec-card{
  display:flex;flex-direction:column;overflow:hidden;
  background:var(--surface);border:1px solid var(--line);border-radius:var(--r-md);
  box-shadow:var(--shadow-1);
  transition:transform .2s ease,box-shadow .2s ease,border-color .2s ease;
}
.rec-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-2);border-color:rgba(11,13,12,.12)}
.rec-cover{position:relative;aspect-ratio:16/9;overflow:hidden;background:var(--paper)}
.rec-cover img{width:100%;height:100%;object-fit:cover;transition:transform .35s ease}
.rec-card:hover .rec-cover img{transform:scale(1.04)}
.rec-cover .rec-badge{
  position:absolute;left:12px;top:12px;
  padding:5px 12px;border-radius:var(--r-pill);
  background:rgba(11,13,12,.78);color:#fff;font-size:12px;font-weight:600;
  backdrop-filter:blur(6px);-webkit-backdrop-filter:blur(6px);
}
.rec-body{padding:18px 18px 22px;display:flex;flex-direction:column;gap:10px;flex:1}
.rec-body h3{margin:0;font-size:17px;font-weight:700;line-height:1.4;letter-spacing:-.01em}
.rec-body p{margin:0;font-size:14px;color:var(--muted);line-height:1.7}
.rec-foot{margin-top:auto;display:flex;align-items:center;justify-content:space-between;font-size:13px;color:var(--muted)}
.rec-foot .go{font-weight:700;color:var(--ink)}

/* ---------- CTA 深色带 ---------- */
.cta-band{
  background:var(--ink);color:#fff;
  border-radius:var(--r-lg);
  padding:34px 26px;
  display:flex;flex-direction:column;gap:22px;
  position:relative;overflow:hidden;
}
@media (min-width:768px){.cta-band{flex-direction:row;align-items:center;justify-content:space-between;padding:46px 52px}}
.cta-band::after{
  content:"";position:absolute;right:-60px;top:-60px;width:240px;height:240px;border-radius:50%;
  background:radial-gradient(circle,rgba(201,242,77,.22),transparent 68%);
}
.cta-band h2{margin:0 0 10px;font-size:clamp(1.35rem,2.4vw,1.9rem);font-weight:700;letter-spacing:-.02em;line-height:1.25}
.cta-band p{margin:0;font-size:15px;color:rgba(255,255,255,.72);max-width:520px}
.cta-actions{display:flex;flex-wrap:wrap;gap:12px;position:relative;z-index:1}

/* ---------- FAQ ---------- */
.faq-list{border-top:1px solid var(--line)}
.faq-item{border-bottom:1px solid var(--line)}
.faq-item summary{
  list-style:none;cursor:pointer;
  display:flex;align-items:center;justify-content:space-between;gap:16px;
  padding:22px 4px;font-size:17px;font-weight:600;color:var(--ink);
  transition:color .2s ease;
}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary:hover{color:#000}
.faq-icon{position:relative;width:16px;height:16px;flex:none}
.faq-icon::before,.faq-icon::after{
  content:"";position:absolute;left:0;top:7px;width:16px;height:2px;border-radius:2px;background:var(--ink);
  transition:transform .2s ease,background .2s ease;
}
.faq-icon::after{transform:rotate(90deg)}
.faq-item[open] .faq-icon::after{transform:rotate(0deg);background:var(--accent2)}
.faq-a{padding:0 4px 24px;max-width:800px;color:var(--muted);font-size:15px;line-height:1.8}

/* ---------- 页脚 ---------- */
.site-footer{
  background:var(--ink);color:#fff;
  margin-top:90px;padding:64px 0 28px;
  position:relative;z-index:2;
}
.footer-grid{display:grid;gap:34px;grid-template-columns:1fr}
@media (min-width:768px){.footer-grid{grid-template-columns:repeat(2,1fr)}}
@media (min-width:1024px){.footer-grid{grid-template-columns:1.6fr 1fr 1fr 1.2fr;gap:40px}}
.footer-brand .brand{color:#fff}
.footer-brand .brand-mark{background:var(--accent);color:var(--ink)}
.footer-desc{margin:16px 0 0;max-width:320px;font-size:14px;line-height:1.8;color:rgba(255,255,255,.66)}
.footer-title{margin:0 0 16px;font-size:14px;font-weight:700;letter-spacing:.05em;color:#fff}
.footer-links{display:flex;flex-direction:column;gap:10px;font-size:14px}
.footer-links a,.footer-links span{color:rgba(255,255,255,.7);transition:color .2s ease}
.footer-links a:hover{color:var(--accent)}
.footer-bottom{
  margin-top:48px;padding-top:20px;
  border-top:1px solid rgba(255,255,255,.12);
  display:flex;flex-wrap:wrap;gap:8px 24px;justify-content:space-between;
  font-size:13px;color:rgba(255,255,255,.55);
}

/* ---------- 入场动效 ---------- */
.reveal{opacity:0;transform:translateY(12px);transition:opacity .3s ease,transform .3s ease}
.reveal.is-visible{opacity:1;transform:none}
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  .reveal{opacity:1;transform:none;transition:none}
  .rec-card,.btn,.rec-cover img{transition:none}
}

/* roulang page: category3 */
:root{
    --ink:#0B0D0C;
    --ink-2:#171B19;
    --paper:#F5F5F1;
    --surface:#FFFFFF;
    --line:#E4E5DF;
    --muted:#6E7671;
    --accent:#C9F24D;
    --accent-2:#FF6B35;
    --r-sm:8px;
    --r-md:14px;
    --r-lg:20px;
    --r-pill:999px;
    --shadow-1:0 1px 2px rgba(11,13,12,.04);
    --shadow-2:0 12px 32px rgba(11,13,12,.10);
    --container:1200px;
  }

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

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

  body{
    margin:0;
    background:var(--paper);
    color:var(--ink);
    font-family:Inter,"Helvetica Neue","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
    font-size:16px;
    line-height:1.7;
    letter-spacing:.01em;
    -webkit-font-smoothing:antialiased;
    font-feature-settings:"tnum" 1;
  }

  img{max-width:100%;display:block;}
  a{color:inherit;text-decoration:none;}
  button{font:inherit;color:inherit;border:0;background:none;cursor:pointer;}
  ul,ol{margin:0;padding:0;list-style:none;}
  h1,h2,h3,h4,p{margin:0;}

  ::selection{background:var(--accent);color:var(--ink);}

  :focus-visible{outline:2px solid var(--ink);outline-offset:2px;border-radius:6px;}

  .container{
    width:100%;
    max-width:var(--container);
    margin:0 auto;
    padding:0 20px;
  }

  .num{font-variant-numeric:tabular-nums;}

  /* ---------- 头部与胶囊导航 ---------- */
  .site-header{
    position:sticky;
    top:0;
    z-index:80;
    padding:16px 0 0;
  }

  .nav-shell{
    display:flex;
    align-items:center;
    gap:20px;
    max-width:var(--container);
    margin:0 auto;
    padding:10px 12px 10px 20px;
    border-radius:var(--r-pill);
    border:1px solid var(--line);
    background:rgba(255,255,255,.72);
    -webkit-backdrop-filter:blur(12px);
    backdrop-filter:blur(12px);
    box-shadow:0 1px 2px rgba(11,13,12,.04);
    transition:background .2s ease-out,box-shadow .2s ease-out,border-color .2s ease-out;
  }

  .nav-shell.is-scrolled{
    background:rgba(255,255,255,.9);
    box-shadow:0 12px 32px rgba(11,13,12,.10);
    border-color:rgba(11,13,12,.08);
  }

  .brand{
    display:inline-flex;
    align-items:center;
    gap:10px;
    flex:0 0 auto;
    font-weight:800;
    letter-spacing:-.02em;
  }

  .brand-mark{
    display:inline-flex;
    align-items:center;
    justify-content:center;
    width:34px;
    height:34px;
    border-radius:var(--r-pill);
    border:2px solid var(--ink);
    color:var(--ink);
    background:var(--accent);
    flex:0 0 auto;
  }

  .brand-text{font-size:16px;white-space:nowrap;}

  .nav-links{
    display:flex;
    align-items:center;
    gap:4px;
    margin:0 auto;
  }

  .nav-link{
    position:relative;
    padding:8px 14px;
    font-size:14.5px;
    font-weight:600;
    color:#3A423E;
    border-radius:var(--r-pill);
    transition:color .18s ease-out,background .18s ease-out;
    white-space:nowrap;
  }

  .nav-link::after{
    content:"";
    position:absolute;
    left:14px;
    right:14px;
    bottom:4px;
    height:2px;
    border-radius:2px;
    background:var(--accent);
    transform:scaleX(0);
    transform-origin:left;
    transition:transform .2s ease-out;
  }

  .nav-link:hover{color:var(--ink);}
  .nav-link:hover::after{transform:scaleX(1);}

  .nav-link.is-active{
    color:var(--ink);
    background:rgba(201,242,77,.28);
  }
  .nav-link.is-active::after{transform:scaleX(1);}

  .nav-cta{
    flex:0 0 auto;
    display:inline-flex;
    align-items:center;
    justify-content:center;
    padding:11px 22px;
    font-size:14px;
    font-weight:700;
    color:var(--ink);
    background:var(--accent);
    border-radius:var(--r-pill);
    transition:transform .18s ease-out,filter .18s ease-out;
  }
  .nav-cta:hover{filter:brightness(1.06);transform:translateY(-2px);}
  .nav-cta:active{transform:scale(.98);}

  .nav-toggle{
    display:none;
    width:44px;
    height:44px;
    margin-left:auto;
    border-radius:var(--r-pill);
    border:1px solid var(--line);
    background:rgba(255,255,255,.6);
    align-items:center;
    justify-content:center;
    flex-direction:column;
    gap:5px;
  }
  .nav-toggle span{
    display:block;
    width:18px;
    height:2px;
    background:var(--ink);
    border-radius:2px;
    transition:transform .2s ease-out,opacity .2s ease-out;
  }
  body.menu-open .nav-toggle span:nth-child(1){transform:translateY(7px) rotate(45deg);}
  body.menu-open .nav-toggle span:nth-child(2){opacity:0;}
  body.menu-open .nav-toggle span:nth-child(3){transform:translateY(-7px) rotate(-45deg);}

  /* ---------- 分类横幅 ---------- */
  .banner{
    position:relative;
    margin-top:-66px;
    padding:150px 0 76px;
    background:linear-gradient(180deg,rgba(11,13,12,.86) 0%,rgba(11,13,12,.72) 45%,rgba(11,13,12,.94) 100%),
               url('/assets/images/backpic/back-2.png') center 30%/cover no-repeat;
    color:#fff;
    overflow:hidden;
  }

  .banner::before{
    content:"";
    position:absolute;
    inset:0;
    background-image:linear-gradient(rgba(255,255,255,.05) 1px,transparent 1px),
                     linear-gradient(90deg,rgba(255,255,255,.05) 1px,transparent 1px);
    background-size:56px 56px;
    opacity:.6;
    pointer-events:none;
  }

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

  .crumb{
    display:flex;
    flex-wrap:wrap;
    align-items:center;
    gap:8px;
    font-size:13px;
    color:rgba(255,255,255,.62);
    margin-bottom:26px;
  }
  .crumb a{transition:color .18s ease-out;}
  .crumb a:hover{color:var(--accent);}
  .crumb .sep{color:rgba(255,255,255,.34);}
  .crumb .current{color:#fff;font-weight:600;}

  .banner-kicker{
    display:inline-flex;
    align-items:center;
    gap:8px;
    padding:6px 14px;
    border:1px solid rgba(201,242,77,.5);
    border-radius:var(--r-pill);
    font-size:12.5px;
    font-weight:700;
    letter-spacing:.06em;
    color:var(--accent);
    margin-bottom:22px;
  }

  .banner-title{
    font-size:clamp(2.4rem,7vw,4.6rem);
    font-weight:800;
    line-height:1.04;
    letter-spacing:-.02em;
    margin-bottom:20px;
  }

  .banner-title em{
    font-style:normal;
    color:var(--accent);
  }

  .banner-lead{
    max-width:640px;
    font-size:clamp(15px,1.6vw,17px);
    line-height:1.8;
    color:rgba(255,255,255,.78);
    margin-bottom:38px;
  }

  .banner-stats{
    display:grid;
    grid-template-columns:repeat(3,minmax(0,1fr));
    gap:20px;
    max-width:760px;
    padding-top:26px;
    border-top:1px solid rgba(255,255,255,.16);
  }

  .banner-stat .stat-num{
    display:block;
    font-size:clamp(1.4rem,2.4vw,1.9rem);
    font-weight:800;
    letter-spacing:-.02em;
    color:var(--accent);
    line-height:1.2;
  }

  .banner-stat .stat-label{
    display:block;
    font-size:12.5px;
    color:rgba(255,255,255,.62);
    margin-top:4px;
  }

  /* ---------- 通用板块 ---------- */
  .section{padding:100px 0;}
  .section-tight{padding:76px 0;}

  .section-head{
    display:flex;
    flex-wrap:wrap;
    align-items:flex-end;
    justify-content:space-between;
    gap:20px;
    margin-bottom:44px;
  }

  .eyebrow{
    display:inline-block;
    font-size:12.5px;
    font-weight:700;
    letter-spacing:.14em;
    color:var(--muted);
    text-transform:uppercase;
    margin-bottom:14px;
  }

  .section-title{
    font-size:clamp(1.5rem,2.6vw,2.25rem);
    font-weight:700;
    line-height:1.2;
    letter-spacing:-.02em;
  }

  .section-sub{
    max-width:560px;
    font-size:15px;
    color:var(--muted);
    margin-top:12px;
  }

  .text-link{
    display:inline-flex;
    align-items:center;
    gap:6px;
    font-size:14.5px;
    font-weight:700;
    color:var(--ink);
    border-bottom:2px solid var(--accent);
    padding-bottom:2px;
    transition:color .18s ease-out,border-color .18s ease-out;
  }
  .text-link:hover{color:var(--accent-2);border-color:var(--accent-2);}

  .badge{
    display:inline-flex;
    align-items:center;
    padding:4px 12px;
    font-size:12px;
    font-weight:600;
    line-height:1.5;
    border-radius:var(--r-pill);
    border:1px solid var(--line);
    color:var(--muted);
    background:var(--surface);
    white-space:nowrap;
  }
  .badge-rare{border-color:var(--accent);color:#3F4A22;background:rgba(201,242,77,.22);}
  .badge-legend{border-color:var(--accent-2);color:#8A3211;background:rgba(255,107,53,.14);}

  .tag{
    display:inline-flex;
    align-items:center;
    padding:6px 14px;
    font-size:13px;
    font-weight:600;
    border-radius:var(--r-pill);
    border:1px solid var(--line);
    background:var(--surface);
    color:#3A423E;
    transition:border-color .18s ease-out,transform .18s ease-out;
  }
  .tag:hover{border-color:var(--ink);transform:translateY(-2px);}

  /* ---------- 卡片 ---------- */
  .card{
    position:relative;
    background:var(--surface);
    border:1px solid var(--line);
    border-radius:var(--r-md);
    box-shadow:var(--shadow-1);
    overflow:hidden;
    transition:transform .2s ease-out,box-shadow .2s ease-out,border-color .2s ease-out;
  }
  .card:hover{transform:translateY(-4px);box-shadow:var(--shadow-2);border-color:#D5D8CE;}

  .card-media{
    display:block;
    width:100%;
    aspect-ratio:16/9;
    object-fit:cover;
    border-radius:var(--r-md) var(--r-md) 0 0;
    transition:transform .35s ease-out;
  }
  .card:hover .card-media{transform:scale(1.04);}

  .card-media-wrap{overflow:hidden;border-radius:var(--r-md) var(--r-md) 0 0;}

  .card-body{padding:24px;}

  .card-title{
    font-size:1.25rem;
    font-weight:700;
    letter-spacing:-.02em;
    margin-bottom:10px;
  }

  .card-text{
    font-size:14.5px;
    color:var(--muted);
    line-height:1.75;
  }

  .card-tags{
    display:flex;
    flex-wrap:wrap;
    gap:8px;
    margin-top:20px;
  }

  /* ---------- 错位双栏 ---------- */
  .offset-grid{
    display:grid;
    grid-template-columns:1fr;
    gap:24px;
  }

  .stack{
    display:flex;
    flex-direction:column;
    gap:20px;
  }

  .card-sm{display:flex;align-items:stretch;gap:0;}
  .card-sm .card-media-wrap{
    flex:0 0 132px;
    border-radius:var(--r-md) 0 0 var(--r-md);
  }
  .card-sm .card-media{
    height:100%;
    aspect-ratio:auto;
    border-radius:0;
  }
  .card-sm .card-body{padding:18px 20px;flex:1 1 auto;}
  .card-sm .card-title{font-size:1.02rem;margin-bottom:6px;}
  .card-sm .card-text{font-size:13.5px;}

  .card-lg .card-body{padding:30px;}
  .card-lg .card-title{font-size:clamp(1.3rem,2.2vw,1.6rem);}
  .card-lg .card-text{font-size:15px;max-width:52ch;}

  .kpi-row{
    display:flex;
    flex-wrap:wrap;
    gap:26px;
    margin-top:24px;
    padding-top:20px;
    border-top:1px solid var(--line);
  }
  .kpi .kpi-num{
    display:block;
    font-size:1.35rem;
    font-weight:800;
    letter-spacing:-.02em;
    line-height:1.2;
  }
  .kpi .kpi-label{
    display:block;
    font-size:12.5px;
    color:var(--muted);
    margin-top:2px;
  }

  /* ---------- 流程步骤 ---------- */
  .steps{
    display:grid;
    grid-template-columns:repeat(4,minmax(0,1fr));
    gap:0;
    border-top:1px solid var(--line);
  }

  .step{
    position:relative;
    padding:32px 26px 32px 0;
  }

  .step::before{
    content:"";
    position:absolute;
    top:0;
    right:0;
    width:1px;
    height:100%;
    background:var(--line);
  }
  .step:last-child::before{display:none;}
  .step:last-child{padding-right:0;}

  .step-num{
    display:block;
    font-size:2.4rem;
    font-weight:800;
    line-height:1;
    letter-spacing:-.04em;
    color:transparent;
    -webkit-text-stroke:1.5px var(--ink);
    margin-bottom:18px;
  }

  .step-name{
    font-size:1.06rem;
    font-weight:700;
    margin-bottom:10px;
  }

  .step-text{
    font-size:14px;
    color:var(--muted);
    line-height:1.75;
    max-width:30ch;
  }

  /* ---------- 进度 / 阶梯 ---------- */
  .tier-board{
    background:var(--ink);
    border-radius:var(--r-lg);
    padding:clamp(28px,4vw,52px);
    color:#fff;
    position:relative;
    overflow:hidden;
  }

  .tier-board::after{
    content:"";
    position:absolute;
    top:-140px;
    right:-120px;
    width:340px;
    height:340px;
    border-radius:50%;
    background:radial-gradient(circle,rgba(201,242,77,.18),transparent 68%);
    pointer-events:none;
  }

  .tier-head{
    display:flex;
    flex-wrap:wrap;
    align-items:flex-end;
    justify-content:space-between;
    gap:18px;
    margin-bottom:36px;
    position:relative;
    z-index:2;
  }

  .tier-head h2{
    font-size:clamp(1.4rem,2.4vw,2rem);
    font-weight:700;
    letter-spacing:-.02em;
  }

  .tier-head p{
    font-size:14.5px;
    color:rgba(255,255,255,.62);
    max-width:44ch;
    margin-top:10px;
  }

  .seg{
    display:inline-flex;
    padding:4px;
    border-radius:var(--r-pill);
    border:1px solid rgba(255,255,255,.18);
    background:rgba(255,255,255,.06);
  }

  .seg button{
    padding:8px 18px;
    font-size:13.5px;
    font-weight:600;
    color:rgba(255,255,255,.66);
    border-radius:var(--r-pill);
    transition:background .18s ease-out,color .18s ease-out;
  }

  .seg button.is-on{
    background:var(--accent);
    color:var(--ink);
  }

  .tier-list{
    display:flex;
    flex-direction:column;
    gap:30px;
    position:relative;
    z-index:2;
  }

  .tier-row{display:block;}

  .tier-meta{
    display:flex;
    align-items:baseline;
    justify-content:space-between;
    gap:16px;
    margin-bottom:12px;
  }

  .tier-name{
    font-size:15px;
    font-weight:600;
  }

  .tier-name small{
    display:inline-block;
    font-weight:400;
    font-size:13px;
    color:rgba(255,255,255,.56);
    margin-left:10px;
  }

  .tier-value{
    font-size:15px;
    font-weight:700;
    color:var(--accent);
  }

  .bar{
    position:relative;
    height:8px;
    border-radius:var(--r-pill);
    background:rgba(255,255,255,.14);
    overflow:hidden;
  }

  .bar-fill{
    position:absolute;
    inset:0 auto 0 0;
    width:0;
    border-radius:var(--r-pill);
    background:linear-gradient(90deg,var(--accent) 0%,var(--accent-2) 100%);
    transition:width .8s cubic-bezier(.22,.61,.36,1);
  }

  .bar-dot{
    position:absolute;
    top:50%;
    width:12px;
    height:12px;
    border-radius:50%;
    background:var(--accent-2);
    box-shadow:0 0 0 4px rgba(255,107,53,.2);
    transform:translate(-50%,-50%);
    transition:left .8s cubic-bezier(.22,.61,.36,1);
  }

  /* ---------- 规则要点 ---------- */
  .rules-layout{
    display:grid;
    grid-template-columns:1fr;
    gap:36px;
  }

  .rule-list{
    display:flex;
    flex-direction:column;
    border-top:1px solid var(--line);
  }

  .rule-item{
    display:grid;
    grid-template-columns:auto 1fr;
    gap:18px;
    padding:22px 4px;
    border-bottom:1px solid var(--line);
    align-items:start;
  }

  .rule-index{
    font-size:13px;
    font-weight:700;
    color:var(--muted);
    padding-top:3px;
    min-width:28px;
  }

  .rule-body h3{
    font-size:1rem;
    font-weight:700;
    margin-bottom:6px;
  }

  .rule-body p{
    font-size:14.5px;
    color:var(--muted);
  }

  .rule-aside{
    background:var(--surface);
    border:1px solid var(--line);
    border-radius:var(--r-lg);
    padding:28px;
  }

  .rule-aside h3{
    font-size:1.06rem;
    font-weight:700;
    margin-bottom:16px;
  }

  .aside-list{display:flex;flex-direction:column;gap:14px;}

  .aside-list li{
    display:flex;
    gap:12px;
    font-size:14px;
    color:var(--muted);
    line-height:1.7;
  }

  .aside-list li::before{
    content:"";
    flex:0 0 auto;
    width:8px;
    height:8px;
    margin-top:8px;
    border-radius:2px;
    background:var(--accent);
  }

  /* ---------- FAQ ---------- */
  .faq-list{
    border-top:1px solid var(--line);
    max-width:860px;
  }

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

  .faq-q{
    display:flex;
    align-items:center;
    justify-content:space-between;
    gap:20px;
    width:100%;
    padding:24px 4px;
    text-align:left;
    font-size:17px;
    font-weight:600;
    letter-spacing:-.01em;
    transition:color .18s ease-out;
  }

  .faq-q:hover{color:#2F3833;}

  .faq-icon{
    position:relative;
    flex:0 0 auto;
    width:22px;
    height:22px;
    border-radius:50%;
    border:1px solid var(--line);
  }
  .faq-icon::before,
  .faq-icon::after{
    content:"";
    position:absolute;
    top:50%;
    left:50%;
    width:9px;
    height:2px;
    background:var(--ink);
    border-radius:2px;
    transform:translate(-50%,-50%);
    transition:transform .2s ease-out,background .2s ease-out;
  }
  .faq-icon::after{transform:translate(-50%,-50%) rotate(90deg);}

  .faq-item.is-open .faq-icon{background:var(--accent);border-color:var(--accent);}
  .faq-item.is-open .faq-icon::after{transform:translate(-50%,-50%) rotate(0deg);}

  .faq-a{
    max-height:0;
    overflow:hidden;
    transition:max-height .28s ease-out;
  }

  .faq-a p{
    padding:0 4px 26px;
    max-width:66ch;
    font-size:15px;
    color:var(--muted);
    line-height:1.8;
  }

  /* ---------- 按钮 ---------- */
  .btn{
    display:inline-flex;
    align-items:center;
    justify-content:center;
    gap:8px;
    padding:14px 28px;
    font-size:15px;
    font-weight:700;
    border-radius:var(--r-pill);
    transition:transform .18s ease-out,filter .18s ease-out,background .18s ease-out,border-color .18s ease-out;
    white-space:nowrap;
  }

  .btn-primary{background:var(--accent);color:var(--ink);}
  .btn-primary:hover{filter:brightness(1.06);transform:translateY(-2px);}
  .btn-primary:active{transform:scale(.98);}

  .btn-ghost{background:transparent;border:1px solid var(--line);color:var(--ink);}
  .btn-ghost:hover{background:rgba(11,13,12,.05);border-color:var(--ink);}
  .btn-ghost:active{transform:scale(.98);}

  .btn-light{background:#fff;color:var(--ink);}
  .btn-light:hover{filter:brightness(.97);transform:translateY(-2px);}

  /* ---------- CTA 收口 ---------- */
  .cta-band{
    background:var(--ink);
    border-radius:var(--r-lg);
    padding:clamp(30px,4.4vw,56px);
    color:#fff;
    display:flex;
    flex-wrap:wrap;
    align-items:center;
    justify-content:space-between;
    gap:28px;
    position:relative;
    overflow:hidden;
  }

  .cta-band::after{
    content:"";
    position:absolute;
    left:-80px;
    bottom:-160px;
    width:320px;
    height:320px;
    border-radius:50%;
    background:radial-gradient(circle,rgba(201,242,77,.16),transparent 70%);
    pointer-events:none;
  }

  .cta-band h2{
    font-size:clamp(1.35rem,2.4vw,2rem);
    font-weight:700;
    letter-spacing:-.02em;
    margin-bottom:12px;
    position:relative;
    z-index:2;
  }

  .cta-band p{
    font-size:14.5px;
    color:rgba(255,255,255,.66);
    max-width:52ch;
    position:relative;
    z-index:2;
  }

  .cta-actions{
    display:flex;
    flex-wrap:wrap;
    gap:14px;
    position:relative;
    z-index:2;
  }

  /* ---------- 页脚 ---------- */
  .site-footer{
    background:var(--ink);
    color:rgba(255,255,255,.72);
    padding:72px 0 32px;
    margin-top:100px;
    font-size:14px;
  }

  .footer-grid{
    display:grid;
    grid-template-columns:1.6fr 1fr 1fr 1.2fr;
    gap:40px;
    padding-bottom:44px;
    border-bottom:1px solid rgba(255,255,255,.12);
  }

  .footer-brand .brand{color:#fff;margin-bottom:18px;}
  .footer-brand .brand-mark{border-color:var(--accent);background:transparent;color:var(--accent);}

  .footer-desc{
    font-size:13.5px;
    line-height:1.8;
    color:rgba(255,255,255,.6);
    max-width:34ch;
  }

  .footer-title{
    font-size:14px;
    font-weight:700;
    color:#fff;
    margin-bottom:18px;
    letter-spacing:.02em;
  }

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

  .footer-links a{
    font-size:14px;
    color:rgba(255,255,255,.66);
    transition:color .18s ease-out,transform .18s ease-out;
    width:fit-content;
  }
  .footer-links a:hover{color:var(--accent);transform:translateX(3px);}

  .footer-bottom{
    display:flex;
    flex-wrap:wrap;
    align-items:center;
    justify-content:space-between;
    gap:12px;
    padding-top:26px;
    font-size:13px;
    color:rgba(255,255,255,.5);
  }

  /* ---------- 动效 ---------- */
  .reveal{
    opacity:0;
    transform:translateY(12px);
    transition:opacity .3s ease-out,transform .3s ease-out;
  }
  .reveal.is-in{opacity:1;transform:none;}

  /* ---------- 响应式 ---------- */
  @media (max-width:1023px){
    .site-header{padding:12px 0 0;}
    .nav-shell{gap:12px;padding:10px 10px 10px 16px;border-radius:var(--r-pill);}
    .nav-toggle{display:flex;}
    .nav-cta{display:none;}

    .nav-links{
      position:fixed;
      inset:0;
      z-index:90;
      display:flex;
      flex-direction:column;
      align-items:flex-start;
      justify-content:center;
      gap:6px;
      padding:96px 28px 40px;
      margin:0;
      background:rgba(11,13,12,.94);
      -webkit-backdrop-filter:blur(14px);
      backdrop-filter:blur(14px);
      opacity:0;
      visibility:hidden;
      transform:translateY(-8px);
      transition:opacity .24s ease-out,visibility .24s ease-out,transform .24s ease-out;
    }

    body.menu-open .nav-links{
      opacity:1;
      visibility:visible;
      transform:none;
    }

    .nav-link{
      width:100%;
      font-size:20px;
      color:rgba(255,255,255,.82);
      padding:14px 0;
      border-radius:0;
      border-bottom:1px solid rgba(255,255,255,.1);
    }
    .nav-link:hover{color:#fff;}
    .nav-link.is-active{color:var(--accent);background:transparent;}
    .nav-link::after{display:none;}

    .nav-shell{position:relative;z-index:95;}

    .banner{margin-top:-60px;padding:132px 0 64px;}

    .section{padding:72px 0;}
    .section-tight{padding:60px 0;}

    .offset-grid{gap:20px;}

    .steps{grid-template-columns:1fr;border-top:0;border-left:1px solid var(--line);}
    .step{padding:0 0 34px 26px;}
    .step::before{display:none;}
    .step:last-child{padding-bottom:0;}
    .step-num{font-size:1.9rem;margin-bottom:12px;}

    .rules-layout{gap:28px;}

    .footer-grid{grid-template-columns:1fr 1fr;gap:32px;}
    .site-footer{padding:56px 0 28px;margin-top:72px;}
  }

  @media (min-width:1024px){
    .offset-grid{
      grid-template-columns:repeat(12,minmax(0,1fr));
      gap:32px;
      align-items:start;
    }
    .card-lg{grid-column:span 7;}
    .stack{grid-column:span 5;}

    .rules-layout{
      grid-template-columns:minmax(0,1.35fr) minmax(0,.85fr);
      gap:52px;
      align-items:start;
    }
    .rule-aside{position:sticky;top:120px;}

    .banner{padding:170px 0 88px;}
  }

  @media (min-width:1440px){
    .container{max-width:1280px;}
    .section{padding:120px 0;}
  }

  @media (max-width:640px){
    .container{padding:0 18px;}
    .brand-text{font-size:15px;}
    .banner-stats{grid-template-columns:1fr;gap:16px;max-width:100%;}
    .banner{margin-top:-56px;padding:120px 0 56px;}
    .banner-lead{font-size:15px;margin-bottom:30px;}
    .card-sm{flex-direction:column;}
    .card-sm .card-media-wrap{
      flex:none;
      width:100%;
      border-radius:var(--r-md) var(--r-md) 0 0;
    }
    .card-sm .card-media{height:auto;aspect-ratio:16/9;}
    .card-lg .card-body{padding:22px;}
    .kpi-row{gap:18px;}
    .cta-band{padding:28px 22px;}
    .cta-actions{width:100%;}
    .cta-actions .btn{flex:1 1 auto;}
    .footer-grid{grid-template-columns:1fr;gap:28px;}
    .footer-bottom{flex-direction:column;align-items:flex-start;}
    .faq-q{font-size:16px;padding:20px 2px;}
  }

  @media (prefers-reduced-motion:reduce){
    *,*::before,*::after{
      animation-duration:.001ms !important;
      transition-duration:.001ms !important;
      scroll-behavior:auto !important;
    }
    .reveal{opacity:1;transform:none;}
    .bar-fill,.bar-dot{transition:none;}
  }

/* roulang page: category4 */
:root{
  --ink:#0B0D0C;
  --ink-2:#171B19;
  --paper:#F5F5F1;
  --surface:#FFFFFF;
  --line:#E4E5DF;
  --muted:#6E7671;
  --accent:#C9F24D;
  --accent-2:#FF6B35;
  --r-sm:8px;
  --r-md:14px;
  --r-lg:20px;
  --r-xl:24px;
  --r-full:999px;
  --sh-1:0 1px 2px rgba(11,13,12,.04);
  --sh-2:0 12px 32px rgba(11,13,12,.10);
  --tr:200ms ease-out;
}

*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  background:var(--paper);
  color:var(--ink);
  font-family:Inter,"Helvetica Neue","PingFang SC","Hiragino Sans GB","Microsoft YaHei","Source Han Sans SC",sans-serif;
  font-size:16px;
  line-height:1.75;
  letter-spacing:.01em;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
button{font:inherit;cursor:pointer;border:0;background:none;color:inherit}
ul,ol{margin:0;padding:0;list-style:none}
h1,h2,h3,h4{margin:0;letter-spacing:-.02em;line-height:1.2;font-weight:700}
p{margin:0}
h1{font-size:clamp(2rem,4.8vw,4rem);font-weight:800;line-height:1.1}
h2{font-size:clamp(1.5rem,2.6vw,2.25rem)}
h3{font-size:1.125rem;font-weight:600}
::selection{background:var(--accent);color:var(--ink)}
:focus-visible{outline:2px solid var(--ink);outline-offset:2px;border-radius:6px}

.container{width:100%;max-width:1200px;margin:0 auto;padding:0 20px}
@media (min-width:768px){.container{padding:0 24px}}
@media (min-width:1024px){.container{padding:0 32px}}
@media (min-width:1440px){.container{max-width:1200px}}

.num{font-variant-numeric:tabular-nums;font-feature-settings:"tnum" 1}

/* ============ 顶部悬浮胶囊导航 ============ */
.site-header{
  position:sticky;
  top:12px;
  z-index:60;
  padding:0 16px;
  margin-top:16px;
}
@media (min-width:1024px){
  .site-header{top:16px;padding:0 20px;margin-top:20px}
}
.nav-shell{
  max-width:1200px;
  margin:0 auto;
  display:flex;
  align-items:center;
  gap:16px;
  padding:10px 12px 10px 16px;
  border-radius:var(--r-full);
  background:rgba(255,255,255,.78);
  backdrop-filter:blur(12px);
  -webkit-backdrop-filter:blur(12px);
  border:1px solid var(--line);
  box-shadow:var(--sh-1);
  transition:background var(--tr),box-shadow var(--tr),border-color var(--tr);
}
.site-header.is-scrolled .nav-shell{
  background:rgba(255,255,255,.94);
  box-shadow:var(--sh-2);
}
.brand{
  display:inline-flex;
  align-items:center;
  gap:10px;
  flex:0 0 auto;
  font-weight:800;
  letter-spacing:-.02em;
}
.brand-mark{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  width:34px;height:34px;
  border-radius:var(--r-full);
  background:var(--ink);
  color:var(--accent);
  flex:0 0 auto;
}
.brand-text{font-size:16px;white-space:nowrap}
.nav-links{
  display:none;
  align-items:center;
  gap:2px;
  margin-left:8px;
}
.nav-link{
  position:relative;
  display:inline-block;
  padding:9px 14px;
  border-radius:var(--r-full);
  font-size:14.5px;
  font-weight:600;
  color:var(--muted);
  transition:color var(--tr),background var(--tr);
  white-space:nowrap;
}
.nav-link::after{
  content:"";
  position:absolute;
  left:14px;right:14px;bottom:4px;
  height:2px;
  border-radius:2px;
  background:var(--accent);
  transform:scaleX(0);
  transform-origin:left;
  transition:transform var(--tr);
}
.nav-link:hover{color:var(--ink)}
.nav-link:hover::after{transform:scaleX(1)}
.nav-link.is-active{color:var(--ink);background:rgba(11,13,12,.055)}
.nav-link.is-active::after{transform:scaleX(1)}
.nav-cta{
  display:none;
  margin-left:auto;
}
.nav-toggle{
  margin-left:auto;
  width:42px;height:42px;
  display:inline-flex;
  align-items:center;
  justify-content:center;
  border-radius:var(--r-full);
  border:1px solid var(--line);
  color:var(--ink);
  background:rgba(255,255,255,.6);
}
.nav-toggle span{
  display:block;
  width:18px;height:2px;
  background:currentColor;
  border-radius:2px;
  position:relative;
}
.nav-toggle span::before,
.nav-toggle span::after{
  content:"";position:absolute;left:0;
  width:18px;height:2px;background:currentColor;border-radius:2px;
  transition:transform var(--tr),top var(--tr);
}
.nav-toggle span::before{top:-6px}
.nav-toggle span::after{top:6px}
.nav-toggle[aria-expanded="true"] span{background:transparent}
.nav-toggle[aria-expanded="true"] span::before{top:0;transform:rotate(45deg)}
.nav-toggle[aria-expanded="true"] span::after{top:0;transform:rotate(-45deg)}

@media (min-width:1024px){
  .nav-links{display:flex}
  .nav-cta{display:inline-flex}
  .nav-toggle{display:none}
}
@media (max-width:359px){
  .brand-text{display:none}
}

.mobile-panel{
  position:fixed;
  inset:0;
  z-index:55;
  background:rgba(11,13,12,.94);
  backdrop-filter:blur(10px);
  -webkit-backdrop-filter:blur(10px);
  padding:96px 24px 32px;
  display:flex;
  flex-direction:column;
  gap:6px;
  opacity:0;
  visibility:hidden;
  transform:translateY(-8px);
  transition:opacity var(--tr),transform var(--tr),visibility var(--tr);
}
.mobile-panel.is-open{opacity:1;visibility:visible;transform:none}
.mobile-panel a{
  color:#fff;
  font-size:20px;
  font-weight:700;
  padding:14px 4px;
  border-bottom:1px solid rgba(255,255,255,.10);
}
.mobile-panel a:hover{color:var(--accent)}
.mobile-panel .mobile-cta{
  margin-top:auto;
  text-align:center;
  background:var(--accent);
  color:var(--ink);
  border-radius:var(--r-full);
  padding:16px;
  border-bottom:0;
  font-size:16px;
}
@media (min-width:1024px){.mobile-panel{display:none}}

/* ============ 按钮 ============ */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:8px;
  padding:14px 28px;
  border-radius:var(--r-full);
  font-weight:700;
  font-size:15px;
  border:1px solid transparent;
  transition:transform var(--tr),background var(--tr),border-color var(--tr),filter var(--tr),color var(--tr);
  will-change:transform;
}
.btn:active{transform:scale(.98)}
.btn-primary{background:var(--accent);color:var(--ink)}
.btn-primary:hover{filter:brightness(1.06);transform:translateY(-2px)}
.btn-ghost{border-color:rgba(255,255,255,.34);color:#fff}
.btn-ghost:hover{background:rgba(255,255,255,.10);transform:translateY(-2px)}
.btn-outline{border-color:var(--line);color:var(--ink);background:var(--surface)}
.btn-outline:hover{background:rgba(11,13,12,.05);border-color:#cdcfc4;transform:translateY(-2px)}
.btn-sm{padding:10px 20px;font-size:14px}

/* ============ 徽章 / 标签 ============ */
.badge{
  display:inline-flex;
  align-items:center;
  gap:6px;
  padding:4px 12px;
  border-radius:var(--r-full);
  border:1px solid var(--line);
  font-size:12px;
  font-weight:600;
  color:var(--muted);
  background:var(--surface);
  white-space:nowrap;
}
.badge-accent{border-color:var(--accent);color:#3d4a12;background:rgba(201,242,77,.22)}
.badge-warm{border-color:var(--accent-2);color:#8a3512;background:rgba(255,107,53,.10)}
.badge-dark{border-color:rgba(255,255,255,.24);color:rgba(255,255,255,.82);background:rgba(255,255,255,.06)}
.tag-row{display:flex;flex-wrap:wrap;gap:8px}

/* ============ Hero 横幅 ============ */
.hero{
  position:relative;
  overflow:hidden;
  margin-top:-72px;
  padding-top:132px;
  padding-bottom:56px;
  background-color:var(--ink);
  background-image:linear-gradient(to bottom,rgba(11,13,12,.74),rgba(11,13,12,.95)),url('/assets/images/backpic/back-2.png');
  background-size:cover;
  background-position:center 32%;
  color:#fff;
}
@media (min-width:1024px){
  .hero{margin-top:-84px;padding-top:152px;padding-bottom:84px;min-height:520px}
}
.hero::after{
  content:"";
  position:absolute;
  inset:0;
  background-image:linear-gradient(rgba(255,255,255,.05) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.05) 1px,transparent 1px);
  background-size:56px 56px;
  opacity:.5;
  pointer-events:none;
}
.hero .container{position:relative;z-index:2}
.hero-inner{max-width:820px}
.crumbs{
  display:flex;
  align-items:center;
  gap:10px;
  font-size:13px;
  color:rgba(255,255,255,.58);
  margin-bottom:22px;
}
.crumbs a:hover{color:var(--accent)}
.crumbs .sep{color:rgba(255,255,255,.28)}
.crumbs .cur{color:#fff}
.hero h1{color:#fff}
.hero h1 em{
  font-style:normal;
  color:var(--accent);
}
.hero-lead{
  margin-top:20px;
  max-width:640px;
  font-size:17px;
  color:rgba(255,255,255,.76);
  line-height:1.85;
}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:32px}
.hero-stats{
  display:grid;
  grid-template-columns:repeat(2,minmax(0,1fr));
  gap:20px 24px;
  margin-top:48px;
  padding-top:28px;
  border-top:1px solid rgba(255,255,255,.14);
  max-width:760px;
}
@media (min-width:768px){
  .hero-stats{grid-template-columns:repeat(4,minmax(0,1fr))}
}
.hero-stat b{
  display:block;
  font-size:26px;
  font-weight:800;
  color:var(--accent);
  font-variant-numeric:tabular-nums;
}
.hero-stat span{
  display:block;
  margin-top:4px;
  font-size:12.5px;
  color:rgba(255,255,255,.60);
}

/* ============ 板块通用 ============ */
.section{padding:64px 0}
@media (min-width:1024px){.section{padding:96px 0}}
.section-tight{padding:48px 0}
@media (min-width:1024px){.section-tight{padding:64px 0}}
.sec-head{max-width:740px;margin-bottom:36px}
@media (min-width:1024px){.sec-head{margin-bottom:52px}}
.eyebrow{
  display:inline-flex;
  align-items:center;
  gap:8px;
  font-size:12.5px;
  font-weight:700;
  letter-spacing:.14em;
  text-transform:uppercase;
  color:var(--muted);
  margin-bottom:14px;
}
.eyebrow::before{
  content:"";
  width:22px;height:2px;border-radius:2px;background:var(--accent-2);
}
.sec-head p{
  margin-top:14px;
  color:var(--muted);
  font-size:15.5px;
  line-height:1.85;
}
.section-dark{
  background:var(--ink);
  color:#fff;
}
.section-dark .sec-head p{color:rgba(255,255,255,.66)}
.section-dark .eyebrow{color:rgba(255,255,255,.55)}

/* ============ 编号时间线 ============ */
.timeline{
  border-top:1px solid var(--line);
}
.tl-item{
  position:relative;
  display:grid;
  grid-template-columns:1fr;
  gap:10px;
  padding:28px 0;
  border-bottom:1px solid var(--line);
  transition:background var(--tr);
}
.tl-item:hover{background:rgba(255,255,255,.66)}
@media (min-width:768px){
  .tl-item{
    grid-template-columns:120px minmax(0,1fr) 200px;
    gap:32px;
    padding:34px 8px;
    align-items:start;
  }
}
.tl-num{
  font-size:clamp(1.9rem,3.4vw,2.75rem);
  font-weight:800;
  line-height:1;
  letter-spacing:-.04em;
  color:transparent;
  -webkit-text-stroke:1.4px rgba(11,13,12,.42);
  font-variant-numeric:tabular-nums;
}
.tl-item:last-child .tl-num{-webkit-text-stroke:1.6px var(--accent-2)}
.tl-body h3{font-size:1.22rem;font-weight:700}
.tl-body p{
  margin-top:10px;
  color:var(--muted);
  font-size:15px;
  line-height:1.85;
  max-width:640px;
}
.tl-side{
  display:flex;
  flex-direction:column;
  gap:10px;
  align-items:flex-start;
}
@media (min-width:768px){.tl-side{align-items:flex-end;text-align:right}}
.tl-side .tl-hint{
  font-size:13px;
  color:var(--muted);
}

/* ============ 非对称双栏 ============ */
.split{
  display:grid;
  grid-template-columns:1fr;
  gap:32px;
  align-items:center;
}
@media (min-width:1024px){
  .split{grid-template-columns:minmax(0,5fr) minmax(0,7fr);gap:64px}
  .split-reverse{grid-template-columns:minmax(0,7fr) minmax(0,5fr)}
}
.figure{
  position:relative;
  border-radius:var(--r-lg);
  overflow:hidden;
  border:1px solid var(--line);
  background:var(--surface);
}
.figure img{
  width:100%;
  height:100%;
  aspect-ratio:4/3;
  object-fit:cover;
  transition:transform 400ms ease-out;
}
.figure:hover img{transform:scale(1.04)}
.figure figcaption{
  padding:12px 16px;
  font-size:13px;
  color:var(--muted);
  border-top:1px solid var(--line);
}
.split-points{
  display:grid;
  gap:16px;
  margin-top:26px;
}
.point{
  display:grid;
  grid-template-columns:26px minmax(0,1fr);
  gap:14px;
}
.point i{
  display:flex;
  align-items:center;
  justify-content:center;
  width:26px;height:26px;
  border-radius:var(--r-full);
  background:rgba(201,242,77,.30);
  border:1px solid var(--accent);
  color:#3f4d13;
  font-style:normal;
  font-size:13px;
  font-weight:800;
  margin-top:3px;
}
.point h4{font-size:1rem;font-weight:700}
.point p{margin-top:5px;color:var(--muted);font-size:14.5px;line-height:1.8}

/* ============ 操作对照列表 ============ */
.ops-list{
  border:1px solid var(--line);
  border-radius:var(--r-lg);
  overflow:hidden;
  background:var(--surface);
  box-shadow:var(--sh-1);
}
.ops-row{
  display:grid;
  grid-template-columns:1fr;
  gap:8px;
  padding:20px 22px;
  border-bottom:1px solid var(--line);
  transition:background var(--tr);
}
.ops-row:last-child{border-bottom:0}
.ops-row:hover{background:rgba(245,245,241,.9)}
@media (min-width:768px){
  .ops-row{
    grid-template-columns:180px minmax(0,1fr) 132px;
    gap:24px;
    align-items:center;
    padding:22px 26px;
  }
}
.ops-name{font-weight:700;font-size:15.5px}
.ops-desc{color:var(--muted);font-size:14.5px;line-height:1.8}
.ops-link{
  justify-self:start;
  font-size:14px;
  font-weight:700;
  color:var(--ink);
  border-bottom:2px solid var(--accent);
  padding-bottom:2px;
  transition:color var(--tr);
}
.ops-link:hover{color:var(--accent-2)}
@media (min-width:768px){.ops-link{justify-self:end}}

/* ============ 帮助入口卡 ============ */
.entry-grid{
  display:grid;
  grid-template-columns:1fr;
  gap:20px;
}
@media (min-width:640px){.entry-grid{grid-template-columns:repeat(2,minmax(0,1fr))}}
@media (min-width:1024px){.entry-grid{grid-template-columns:repeat(4,minmax(0,1fr))}}
.entry-card{
  display:flex;
  flex-direction:column;
  gap:14px;
  padding:22px;
  border-radius:var(--r-md);
  border:1px solid var(--line);
  background:var(--surface);
  box-shadow:var(--sh-1);
  transition:transform var(--tr),box-shadow var(--tr),border-color var(--tr);
}
.entry-card:hover{
  transform:translateY(-4px);
  box-shadow:var(--sh-2);
  border-color:#d3d5c9;
}
.entry-card .entry-icon{
  display:flex;
  align-items:center;
  justify-content:center;
  width:40px;height:40px;
  border-radius:var(--r-sm);
  background:var(--ink);
  color:var(--accent);
  font-weight:800;
  font-size:14px;
  font-variant-numeric:tabular-nums;
}
.entry-card h3{font-size:1.05rem}
.entry-card p{color:var(--muted);font-size:14.5px;line-height:1.8;flex:1}
.entry-card .entry-more{
  font-size:14px;
  font-weight:700;
  color:var(--ink);
  display:inline-flex;
  align-items:center;
  gap:6px;
}
.entry-card:hover .entry-more{color:var(--accent-2)}
.entry-card .entry-more::after{content:"→";transition:transform var(--tr)}
.entry-card:hover .entry-more::after{transform:translateX(4px)}

/* ============ CTA 收口 ============ */
.cta-band{
  background:var(--ink);
  color:#fff;
  border-radius:var(--r-xl);
  padding:36px 26px;
  display:grid;
  gap:24px;
  align-items:center;
  position:relative;
  overflow:hidden;
}
.cta-band::before{
  content:"";
  position:absolute;
  right:-80px;top:-90px;
  width:280px;height:280px;
  border-radius:50%;
  border:1px solid rgba(201,242,77,.30);
  pointer-events:none;
}
@media (min-width:1024px){
  .cta-band{grid-template-columns:minmax(0,1fr) auto;padding:52px 56px;gap:40px}
}
.cta-band h2{font-size:clamp(1.45rem,2.4vw,2rem);color:#fff;position:relative;z-index:1}
.cta-band p{
  margin-top:12px;
  color:rgba(255,255,255,.68);
  font-size:15px;
  max-width:620px;
  line-height:1.85;
  position:relative;
  z-index:1;
}
.cta-band .cta-actions{
  display:flex;
  flex-wrap:wrap;
  gap:12px;
  position:relative;
  z-index:1;
}

/* ============ FAQ 手风琴 ============ */
.faq-list{border-top:1px solid var(--line)}
.faq-item{border-bottom:1px solid var(--line)}
.faq-q{
  width:100%;
  display:flex;
  align-items:flex-start;
  justify-content:space-between;
  gap:20px;
  text-align:left;
  padding:22px 4px;
  font-size:17px;
  font-weight:600;
  color:var(--ink);
  transition:color var(--tr);
}
.faq-q:hover{color:#2c3320}
.faq-q .faq-ic{
  flex:0 0 auto;
  width:26px;height:26px;
  border-radius:var(--r-full);
  border:1px solid var(--line);
  display:flex;
  align-items:center;
  justify-content:center;
  margin-top:2px;
  transition:transform var(--tr),background var(--tr),border-color var(--tr);
}
.faq-q .faq-ic::before{
  content:"";
  width:10px;height:10px;
  border-right:2px solid var(--ink);
  border-bottom:2px solid var(--ink);
  transform:rotate(45deg) translate(-1px,-1px);
  transition:transform var(--tr);
}
.faq-item.is-open .faq-ic{background:var(--accent);border-color:var(--accent)}
.faq-item.is-open .faq-ic::before{transform:rotate(-135deg) translate(-2px,-2px)}
.faq-a{
  max-height:0;
  overflow:hidden;
  transition:max-height 240ms ease-out;
}
.faq-a p{
  padding:0 40px 24px 4px;
  color:var(--muted);
  font-size:15px;
  line-height:1.9;
}
.faq-item.is-open .faq-a{max-height:420px}

/* ============ 脚注小卡 ============ */
.note-card{
  display:flex;
  gap:16px;
  align-items:flex-start;
  padding:20px 22px;
  border-radius:var(--r-md);
  border:1px solid var(--line);
  background:rgba(201,242,77,.14);
}
.note-card strong{font-size:14.5px}
.note-card p{margin-top:6px;font-size:14px;color:var(--muted)}

/* ============ 页脚 ============ */
.site-footer{
  background:var(--ink);
  color:rgba(255,255,255,.72);
  padding:64px 0 28px;
  margin-top:80px;
}
@media (min-width:1024px){.site-footer{padding:88px 0 32px;margin-top:112px}}
.footer-grid{
  display:grid;
  grid-template-columns:1fr;
  gap:36px;
}
@media (min-width:640px){.footer-grid{grid-template-columns:repeat(2,minmax(0,1fr))}}
@media (min-width:1024px){.footer-grid{grid-template-columns:1.7fr 1fr 1fr 1.2fr;gap:48px}}
.footer-brand .brand{color:#fff}
.footer-brand .brand-mark{background:var(--accent);color:var(--ink)}
.footer-desc{
  margin-top:18px;
  font-size:14px;
  line-height:1.9;
  color:rgba(255,255,255,.62);
  max-width:360px;
}
.footer-title{
  font-size:14px;
  font-weight:700;
  color:#fff;
  margin-bottom:16px;
  letter-spacing:.02em;
}
.footer-links{display:grid;gap:10px}
.footer-links a{
  font-size:14px;
  color:rgba(255,255,255,.70);
  transition:color var(--tr);
}
.footer-links a:hover{color:var(--accent)}
.footer-bottom{
  margin-top:48px;
  padding-top:22px;
  border-top:1px solid rgba(255,255,255,.12);
  display:flex;
  flex-wrap:wrap;
  gap:10px 24px;
  justify-content:space-between;
  font-size:13px;
  color:rgba(255,255,255,.48);
}

/* ============ 入场动效 ============ */
.reveal{
  opacity:0;
  transform:translateY(12px);
  transition:opacity 300ms ease-out,transform 300ms ease-out;
}
.reveal.is-visible{opacity:1;transform:none}

@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{
    animation-duration:.001ms !important;
    transition-duration:.001ms !important;
    animation-iteration-count:1 !important;
  }
  .reveal{opacity:1;transform:none}
}