/* roulang page: index */
:root{
    --lime:#B7F04A;
    --lime-deep:#6E9E2A;
    --lime-ink:#14200C;
    --ink:#0D1210;
    --ink-2:#16201C;
    --paper:#F6F6F2;
    --card:#FFFFFF;
    --soft:#EFF1EA;
    --moss:#4C6B63;
    --text:#12171A;
    --muted:#5F6A66;
    --faint:#8B948E;
    --line:#E2E5DE;
    --line-dark:rgba(255,255,255,.12);
    --r-card:14px;
    --r-img:16px;
    --r-input:10px;
    --r-badge:6px;
    --shadow-1:0 1px 2px rgba(13,18,16,.04);
    --shadow-2:0 10px 28px rgba(13,18,16,.09);
    --ease:cubic-bezier(.2,.7,.3,1);
  }
  *,*::before,*::after{box-sizing:border-box;}
  html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
  body{
    margin:0;background:var(--paper);color:var(--text);
    font-family:"Noto Sans SC","PingFang SC","Microsoft YaHei","Hiragino Sans GB",system-ui,sans-serif;
    font-size:16px;line-height:1.75;
    -webkit-font-smoothing:antialiased;
  }
  img{display:block;max-width:100%;}
  a{color:inherit;text-decoration:none;}
  button,input,textarea,select{font:inherit;color:inherit;}
  h1,h2,h3,h4,p,ul,ol,figure{margin:0;}
  ul,ol{padding:0;list-style:none;}
  .wrap{width:100%;max-width:1200px;margin:0 auto;padding-left:20px;padding-right:20px;}
  @media (min-width:768px){.wrap{padding-left:32px;padding-right:32px;}}
  a:focus-visible,button:focus-visible,summary:focus-visible,input:focus-visible,textarea:focus-visible{
    outline:2px solid var(--lime);outline-offset:2px;border-radius:4px;
  }

  /* ---------- 头部导航 ---------- */
  .site-header{
    position:sticky;top:0;z-index:50;
    background:rgba(246,246,242,.92);
    backdrop-filter:saturate(180%) blur(12px);
    -webkit-backdrop-filter:saturate(180%) blur(12px);
    border-bottom:1px solid transparent;
    transition:border-color .2s var(--ease),background-color .2s var(--ease);
  }
  .site-header.scrolled{border-bottom-color:var(--line);background:rgba(246,246,242,.97);}
  .brand{display:inline-flex;align-items:center;gap:11px;}
  .brand-mark{
    position:relative;width:26px;height:26px;border:1.5px solid var(--text);
    border-radius:8px 8px 8px 2px;flex:none;
  }
  .brand-mark::after{
    content:"";position:absolute;right:-4px;bottom:-4px;width:10px;height:10px;
    background:var(--lime);border-radius:3px;
  }
  .brand-text{display:flex;flex-direction:column;line-height:1.05;}
  .brand-name{font-size:16.5px;font-weight:800;letter-spacing:-.01em;}
  .brand-sub{font-size:11px;color:var(--faint);letter-spacing:.06em;font-weight:500;}
  .nav-link{
    position:relative;display:inline-block;padding:6px 0;
    font-size:14.5px;font-weight:500;color:var(--text);
    transition:color .2s var(--ease);
  }
  .nav-link::after{
    content:"";position:absolute;left:0;right:0;bottom:0;height:2px;
    background:var(--lime);transform:scaleX(0);transform-origin:left;
    transition:transform .2s var(--ease);
  }
  .nav-link:hover::after,.nav-link.is-active::after{transform:scaleX(1);}
  .nav-link.is-active{font-weight:700;}
  .nav-link:hover{color:#000;}

  /* ---------- 按钮 ---------- */
  .btn{
    display:inline-flex;align-items:center;justify-content:center;gap:8px;
    border-radius:999px;padding:12px 24px;font-size:15px;font-weight:600;
    border:1px solid transparent;cursor:pointer;white-space:nowrap;
    transition:background-color .2s var(--ease),border-color .2s var(--ease),
               color .2s var(--ease),transform .2s var(--ease),box-shadow .2s var(--ease);
  }
  .btn-primary{background:var(--lime);color:var(--lime-ink);}
  .btn-primary:hover{background:#a9e236;}
  .btn-primary:active{transform:scale(.98);}
  .btn-primary .btn-arrow{transition:transform .2s var(--ease);}
  .btn-primary:hover .btn-arrow{transform:translateX(3px);}
  .btn-ghost{border-color:var(--line);color:var(--text);background:transparent;}
  .btn-ghost:hover{border-color:var(--lime);background:var(--soft);}
  .btn-ghost:active{transform:scale(.98);}
  .btn-outline-light{border-color:rgba(255,255,255,.28);color:#fff;background:transparent;}
  .btn-outline-light:hover{border-color:var(--lime);color:var(--lime);}
  .btn-sm{padding:9px 18px;font-size:14px;}

  .text-link{
    display:inline-flex;align-items:center;gap:6px;font-size:14px;font-weight:600;
    color:var(--text);position:relative;padding-bottom:2px;
  }
  .text-link::after{
    content:"";position:absolute;left:0;bottom:0;height:2px;width:100%;
    background:var(--lime);transform:scaleX(0);transform-origin:left;
    transition:transform .2s var(--ease);
  }
  .text-link:hover::after{transform:scaleX(1);}
  .text-link .arrow{transition:transform .2s var(--ease);}
  .text-link:hover .arrow{transform:translateX(3px);}
  .text-link-light{color:rgba(255,255,255,.85);}
  .text-link-light:hover{color:var(--lime);}

  /* ---------- 徽章 / 标签 ---------- */
  .badge{
    display:inline-flex;align-items:center;gap:6px;
    border-radius:var(--r-badge);background:var(--soft);color:var(--moss);
    font-size:12.5px;letter-spacing:.02em;padding:4px 10px;line-height:1.6;
  }
  .badge-light{background:rgba(255,255,255,.08);color:rgba(255,255,255,.82);}
  .eyebrow{
    display:inline-flex;align-items:center;gap:8px;
    font-size:12.5px;letter-spacing:.08em;color:var(--moss);font-weight:600;
  }
  .eyebrow::before{content:"";width:18px;height:1px;background:var(--lime);}

  /* ---------- 板块标题 ---------- */
  .sec-head{display:flex;align-items:flex-start;gap:10px;margin-bottom:10px;}
  .sec-bar{flex:none;width:4px;height:22px;background:var(--lime);border-radius:2px;margin-top:5px;}
  .sec-title{font-size:clamp(1.4rem,2.4vw,2rem);font-weight:700;line-height:1.3;letter-spacing:-.01em;}
  .sec-sub{font-size:15px;color:var(--muted);max-width:640px;}

  /* ---------- 图片容器 ---------- */
  .img-wrap{
    position:relative;overflow:hidden;border-radius:var(--r-img);
    background:#E8EBE3;
    background-image:repeating-linear-gradient(45deg,#E1E5DB 0 6px,#EFF1EA 6px 12px);
  }
  .img-wrap img{width:100%;height:100%;object-fit:cover;transition:transform .3s var(--ease);}
  .ratio-16x10{aspect-ratio:16/10;}
  .ratio-16x9{aspect-ratio:16/9;}
  .ratio-21x9{aspect-ratio:21/9;}
  .ratio-4x3{aspect-ratio:4/3;}

  /* ---------- Hero ---------- */
  .hero{position:relative;background:var(--ink);color:#fff;overflow:hidden;}
  .hero-bg{
    position:absolute;inset:0;
    background-image:url('/assets/images/backpic/back-1.png');
    background-size:cover;background-position:center;
    opacity:.42;
  }
  .hero-overlay{
    position:absolute;inset:0;
    background:linear-gradient(105deg,rgba(13,18,16,.95) 0%,rgba(13,18,16,.78) 48%,rgba(13,18,16,.6) 100%);
  }
  .hero-inner{position:relative;z-index:2;}
  .hero-grid{display:grid;gap:40px;align-items:center;padding:60px 0 48px;}
  @media (min-width:1024px){
    .hero-grid{grid-template-columns:1.05fr .95fr;gap:64px;padding:92px 0 68px;}
  }
  .hero h1{
    font-size:clamp(1.9rem,4.4vw,3.6rem);font-weight:800;line-height:1.14;
    letter-spacing:-.02em;color:#fff;margin:16px 0 0;
  }
  .hero-lead{
    margin-top:18px;font-size:16px;line-height:1.8;color:rgba(255,255,255,.72);max-width:520px;
  }
  @media (min-width:768px){.hero-lead{font-size:17px;}}
  .hero-actions{display:flex;flex-wrap:wrap;align-items:center;gap:20px;margin-top:32px;}
  .hero-stats{
    display:grid;grid-template-columns:repeat(2,1fr);gap:24px 20px;
    border-top:1px solid var(--line-dark);padding:26px 0 40px;
  }
  @media (min-width:768px){.hero-stats{grid-template-columns:repeat(4,1fr);gap:24px;padding:30px 0 56px;}}
  .stat-num{
    font-size:32px;font-weight:800;line-height:1.1;color:var(--lime);
    font-variant-numeric:tabular-nums;letter-spacing:-.02em;
  }
  .stat-num span{font-size:15px;font-weight:600;margin-left:2px;}
  .stat-label{font-size:12.5px;letter-spacing:.02em;color:rgba(255,255,255,.6);margin-top:8px;}
  .hero-card{
    border-radius:var(--r-img);overflow:hidden;border:1px solid var(--line-dark);
  }

  /* ---------- 卡片 ---------- */
  .card{
    display:flex;flex-direction:column;background:var(--card);
    border:1px solid var(--line);border-radius:var(--r-card);
    box-shadow:var(--shadow-1);overflow:hidden;
    transition:transform .2s var(--ease),border-color .2s var(--ease),box-shadow .2s var(--ease);
  }
  .card:hover{
    transform:translateY(-3px);
    border-color:rgba(183,240,74,.65);
    box-shadow:var(--shadow-2);
  }
  .card:hover .img-wrap img{transform:scale(1.03);}
  .card-body{padding:20px;display:flex;flex-direction:column;flex:1;}
  .card-title{
    font-size:17px;font-weight:600;line-height:1.5;margin-top:12px;
    display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
  }
  .card-summary{
    font-size:14px;line-height:1.7;color:var(--muted);margin-top:10px;
    display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
  }
  .card-meta{
    display:flex;align-items:center;justify-content:space-between;gap:12px;
    margin-top:16px;padding-top:14px;border-top:1px solid var(--line);
    font-size:12.5px;color:var(--faint);letter-spacing:.02em;
  }

  /* ---------- 卖点区 ---------- */
  .feature-lg{display:flex;flex-direction:column;}
  .feature-mini{
    position:relative;display:flex;flex-direction:column;justify-content:center;
    background:var(--card);border:1px solid var(--line);border-radius:var(--r-card);
    padding:28px 28px 28px 32px;box-shadow:var(--shadow-1);
    transition:transform .2s var(--ease),border-color .2s var(--ease),box-shadow .2s var(--ease);
  }
  .feature-mini::before{
    content:"";position:absolute;left:0;top:28px;bottom:28px;width:3px;
    background:var(--lime);border-radius:0 3px 3px 0;
  }
  .feature-mini:hover{
    transform:translateY(-3px);border-color:rgba(183,240,74,.65);box-shadow:var(--shadow-2);
  }
  .feature-no{
    font-size:12.5px;font-weight:700;letter-spacing:.1em;color:var(--lime-deep);
    font-variant-numeric:tabular-nums;
  }
  .feature-title{font-size:19px;font-weight:700;line-height:1.45;margin-top:12px;}
  .feature-desc{font-size:14.5px;line-height:1.8;color:var(--muted);margin-top:12px;}

  /* ---------- 场景交替 ---------- */
  .scene-row{display:grid;gap:32px;align-items:center;}
  @media (min-width:1024px){
    .scene-row{grid-template-columns:1fr 1fr;gap:64px;}
    .scene-row.reverse .scene-media{order:2;}
  }
  .check-list{display:grid;gap:14px;margin-top:24px;}
  .check-list li{display:flex;gap:12px;font-size:15px;line-height:1.75;color:#2b3230;}
  .check-icon{
    flex:none;width:20px;height:20px;margin-top:3px;border-radius:50%;
    background:rgba(183,240,74,.28);display:flex;align-items:center;justify-content:center;
  }
  .check-icon svg{width:12px;height:12px;stroke:var(--lime-ink);stroke-width:2.4;fill:none;}

  /* ---------- 深色证据带 ---------- */
  .proof{
    background:var(--ink);color:#fff;padding:64px 0;
  }
  @media (min-width:768px){.proof{padding:88px 0;}}
  .proof-quote{
    font-size:clamp(1.35rem,2.4vw,1.75rem);font-weight:600;line-height:1.55;
    letter-spacing:-.01em;max-width:640px;
  }
  .proof-quote .qm{color:var(--lime);font-size:1.6em;line-height:0;vertical-align:-.12em;margin-right:4px;}
  .review-scroll{
    display:flex;gap:16px;overflow-x:auto;scroll-snap-type:x mandatory;
    padding-bottom:6px;margin-top:36px;
    scrollbar-width:none;-ms-overflow-style:none;
  }
  .review-scroll::-webkit-scrollbar{display:none;}
  .review-card{
    flex:0 0 82%;scroll-snap-align:start;
    background:var(--ink-2);border:1px solid var(--line-dark);
    border-radius:var(--r-card);padding:22px;
  }
  @media (min-width:768px){
    .review-scroll{display:grid;grid-template-columns:repeat(3,1fr);overflow:visible;margin-top:40px;}
    .review-card{flex:auto;}
  }
  .review-text{font-size:14.5px;line-height:1.8;color:rgba(255,255,255,.82);}
  .review-from{font-size:12.5px;color:rgba(255,255,255,.5);margin-top:16px;letter-spacing:.02em;}
  .trust-strip{
    display:flex;flex-wrap:wrap;gap:10px;margin-top:36px;
    padding-top:26px;border-top:1px solid var(--line-dark);
  }
  .trust-chip{
    display:inline-flex;align-items:center;gap:7px;font-size:12.5px;
    color:rgba(255,255,255,.72);border:1px solid rgba(255,255,255,.18);
    border-radius:999px;padding:7px 15px;letter-spacing:.02em;
  }
  .trust-chip::before{content:"";width:5px;height:5px;border-radius:50%;background:var(--lime);}

  /* ---------- FAQ ---------- */
  .faq-item{border-top:1px solid var(--line);}
  .faq-item:last-child{border-bottom:1px solid var(--line);}
  .faq-item summary{
    list-style:none;cursor:pointer;position:relative;
    padding:20px 48px 20px 14px;border-left:3px solid transparent;
    font-size:16px;font-weight:600;line-height:1.65;
    transition:border-color .2s var(--ease),color .2s var(--ease);
  }
  .faq-item summary::-webkit-details-marker{display:none;}
  .faq-item summary::before{
    content:"";position:absolute;right:16px;top:31px;width:12px;height:1.5px;background:var(--text);
  }
  .faq-item summary::after{
    content:"";position:absolute;right:21px;top:26px;width:1.5px;height:12px;background:var(--text);
    transition:transform .2s var(--ease),opacity .2s var(--ease);
  }
  .faq-item[open] summary{border-left-color:var(--lime);}
  .faq-item[open] summary::after{transform:rotate(90deg);opacity:0;}
  .faq-item summary:hover{color:#000;}
  .faq-answer{
    padding:0 48px 22px 17px;font-size:14.5px;line-height:1.85;color:var(--muted);
  }

  /* ---------- 底部 CTA ---------- */
  .cta-band{
    position:relative;background:var(--ink);color:#fff;overflow:hidden;
    padding:72px 0;text-align:center;
  }
  @media (min-width:768px){.cta-band{padding:100px 0;}}
  .cta-band .cta-bg{
    position:absolute;inset:0;
    background-image:url('/assets/images/backpic/back-3.png');
    background-size:cover;background-position:center;opacity:.28;
  }
  .cta-band .cta-veil{
    position:absolute;inset:0;
    background:linear-gradient(180deg,rgba(13,18,16,.86),rgba(13,18,16,.96));
  }
  .cta-inner{position:relative;z-index:2;}
  .cta-title{font-size:clamp(1.5rem,3vw,2.35rem);font-weight:800;line-height:1.25;letter-spacing:-.02em;}

  /* ---------- 页脚 ---------- */
  .site-footer{background:var(--ink);color:#fff;padding-top:64px;}
  .footer-brand .brand-mark{border-color:rgba(255,255,255,.85);}
  .footer-brand .brand-name{color:#fff;}
  .footer-brand .brand-sub{color:rgba(255,255,255,.5);}
  .footer-desc{font-size:14px;line-height:1.85;color:rgba(255,255,255,.62);margin-top:18px;max-width:340px;}
  .footer-h{font-size:13px;font-weight:700;letter-spacing:.06em;color:#fff;margin-bottom:16px;}
  .footer-links{display:grid;gap:11px;}
  .footer-link{font-size:14px;color:rgba(255,255,255,.72);transition:color .2s var(--ease);}
  .footer-link:hover{color:var(--lime);text-decoration:underline;text-underline-offset:4px;}
  .footer-bottom{
    margin-top:52px;padding:22px 0;border-top:1px solid var(--line-dark);
    display:flex;flex-wrap:wrap;gap:10px 20px;align-items:center;justify-content:space-between;
    font-size:12.5px;color:rgba(255,255,255,.48);letter-spacing:.02em;
  }

  /* ---------- 表单 ---------- */
  .form-card{
    background:var(--card);border:1px solid var(--line);border-radius:var(--r-card);
    padding:26px;box-shadow:var(--shadow-1);
  }
  .field{margin-bottom:18px;}
  .field label{display:block;font-size:13px;font-weight:600;margin-bottom:8px;}
  .field input,.field textarea{
    width:100%;background:#fff;border:1px solid var(--line);border-radius:var(--r-input);
    padding:12px 14px;font-size:14.5px;line-height:1.6;
    transition:border-color .2s var(--ease),box-shadow .2s var(--ease);
  }
  .field textarea{min-height:110px;resize:vertical;}
  .field input:focus,.field textarea:focus{
    outline:none;border-color:var(--lime);box-shadow:0 0 0 4px rgba(183,240,74,.24);
  }
  .field input::placeholder,.field textarea::placeholder{color:var(--faint);}

  /* ---------- 空状态 ---------- */
  .empty-state{
    border:1px dashed var(--line);border-radius:var(--r-card);background:var(--card);
    padding:48px 24px;text-align:center;
  }
  .empty-state svg{width:34px;height:34px;stroke:var(--moss);stroke-width:1.5;fill:none;margin:0 auto 14px;}
  .empty-state p{font-size:14.5px;color:var(--muted);}
  .empty-state a{display:inline-block;margin-top:14px;}

  /* ---------- 移动端底部 Tab ---------- */
  .mobile-tab{
    display:flex;position:fixed;left:0;right:0;bottom:0;z-index:60;
    background:#fff;border-top:1px solid var(--line);
    padding-bottom:env(safe-area-inset-bottom);
  }
  .mobile-tab a{
    position:relative;flex:1;display:flex;flex-direction:column;
    align-items:center;justify-content:center;gap:3px;height:56px;
    font-size:11.5px;letter-spacing:.02em;color:var(--faint);
    transition:color .2s var(--ease);
  }
  .mobile-tab a svg{width:21px;height:21px;stroke-width:1.5;fill:none;stroke:currentColor;
    transition:stroke .2s var(--ease);}
  .mobile-tab a::before{
    content:"";position:absolute;top:0;left:50%;width:22px;height:2px;
    background:var(--lime);border-radius:0 0 2px 2px;
    transform:translateX(-50%) scaleX(0);transition:transform .2s var(--ease);
  }
  .mobile-tab a.is-active{color:var(--lime-deep);font-weight:700;}
  .mobile-tab a.is-active::before{transform:translateX(-50%) scaleX(1);}
  @media (min-width:768px){.mobile-tab{display:none;}}

  /* ---------- 移动端固定转化条 ---------- */
  .mobile-cta{
    display:flex;align-items:center;gap:12px;
    position:fixed;left:0;right:0;z-index:59;
    bottom:calc(56px + env(safe-area-inset-bottom));
    padding:10px 16px;background:rgba(13,18,16,.96);
    border-top:1px solid var(--line-dark);
    backdrop-filter:blur(8px);-webkit-backdrop-filter:blur(8px);
  }
  .mobile-cta p{flex:1;font-size:13px;line-height:1.5;color:rgba(255,255,255,.78);}
  @media (min-width:768px){.mobile-cta{display:none;}}
  @media (max-width:767px){
    body{padding-bottom:136px;}
  }

  /* ---------- 入场动效 ---------- */
  .reveal{opacity:0;transform:translateY(12px);
    transition:opacity .55s var(--ease),transform .55s var(--ease);}
  .reveal.in{opacity:1;transform:none;}
  @media (prefers-reduced-motion:reduce){
    .reveal{opacity:1;transform:none;transition:none;}
    .card,.feature-mini,.img-wrap img,.btn{transition:none;}
    html{scroll-behavior:auto;}
  }

/* roulang page: article */
:root{
  --lime:#B7F04A;
  --lime-deep:#A9E238;
  --lime-ink:#14200C;
  --ink:#0D1210;
  --ink2:#16201C;
  --paper:#F6F6F2;
  --card:#FFFFFF;
  --soft:#EFF1EA;
  --sage:#4C6B63;
  --text:#12171A;
  --mute:#5F6A66;
  --faint:#8B948E;
  --line:#E2E5DE;
  --shadow-1:0 1px 2px rgba(13,18,16,.04);
  --shadow-2:0 10px 28px rgba(13,18,16,.09);
  --radius-card:14px;
  --radius-img:16px;
  --radius-input:10px;
  --ease:cubic-bezier(.2,.7,.3,1);
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;}
body{
  margin:0;
  background:var(--paper);
  color:var(--text);
  font-family:"Noto Sans SC","PingFang SC","Microsoft YaHei","Hiragino Sans GB",system-ui,sans-serif;
  font-size:16px;
  line-height:1.75;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;}
a{color:inherit;text-decoration:none;}
button,input,textarea,select{font:inherit;color:inherit;}
h1,h2,h3,h4,p,figure,blockquote,ul,ol{margin:0;}
ul,ol{padding:0;list-style:none;}
.wrap{max-width:1200px;margin:0 auto;padding-left:20px;padding-right:20px;}
@media (min-width:768px){.wrap{padding-left:32px;padding-right:32px;}}
a:focus-visible,button:focus-visible,summary:focus-visible,input:focus-visible,textarea:focus-visible{
  outline:2px solid var(--lime);outline-offset:2px;border-radius:4px;
}

/* ---------- header ---------- */
.site-header{
  position:sticky;top:0;z-index:60;
  background:rgba(246,246,242,.88);
  backdrop-filter:blur(10px);
  -webkit-backdrop-filter:blur(10px);
  border-bottom:1px solid transparent;
  transition:border-color .2s var(--ease),background-color .2s var(--ease);
}
.site-header.is-scrolled{border-bottom-color:var(--line);background:rgba(246,246,242,.95);}
.brand{display:inline-flex;align-items:center;gap:11px;}
.brand-mark{position:relative;width:22px;height:22px;border-radius:7px;background:var(--ink);flex:0 0 auto;}
.brand-mark::after{content:"";position:absolute;right:-3px;bottom:-3px;width:9px;height:9px;border-radius:3px;background:var(--lime);}
.brand-text{display:flex;flex-direction:column;line-height:1.15;}
.brand-name{font-size:17px;font-weight:800;letter-spacing:-.01em;color:var(--ink);}
.brand-sub{font-size:11px;letter-spacing:.08em;color:var(--faint);}
.nav-link{position:relative;font-size:14.5px;color:var(--mute);padding:4px 0;transition:color .2s var(--ease);}
.nav-link::after{content:"";position:absolute;left:0;bottom:-3px;height:2px;width:0;background:var(--lime);transition:width .2s var(--ease);}
.nav-link:hover{color:var(--text);}
.nav-link:hover::after{width:100%;}
.nav-link.is-active{color:var(--text);font-weight:600;}
.nav-link.is-active::after{width:100%;}
.mobile-pagebar{display:flex;align-items:center;gap:8px;font-size:12.5px;letter-spacing:.02em;color:var(--faint);padding:8px 0 10px;border-top:1px solid var(--line);overflow:hidden;white-space:nowrap;text-overflow:ellipsis;}
@media (min-width:768px){.mobile-pagebar{display:none;}}

/* ---------- buttons ---------- */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;border-radius:999px;font-weight:600;line-height:1;border:1px solid transparent;cursor:pointer;transition:background-color .2s var(--ease),border-color .2s var(--ease),transform .2s var(--ease),color .2s var(--ease);}
.btn-primary{background:var(--lime);color:var(--lime-ink);padding:13px 26px;font-size:15px;}
.btn-primary:hover{background:var(--lime-deep);}
.btn-sm{padding:9px 18px;font-size:14px;}
.btn-arrow{display:inline-block;transition:transform .2s var(--ease);}
.btn:hover .btn-arrow{transform:translateX(3px);}
.btn:active{transform:scale(.98);}
.btn-ghost{border-color:var(--line);color:var(--text);background:transparent;padding:13px 26px;font-size:15px;}
.btn-ghost:hover{border-color:var(--lime);background:var(--soft);}
.btn-ghost-dark{border-color:rgba(255,255,255,.28);color:#fff;background:transparent;padding:13px 26px;font-size:15px;}
.btn-ghost-dark:hover{border-color:var(--lime);background:rgba(255,255,255,.06);}

/* ---------- breadcrumb ---------- */
.crumb{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:12.5px;letter-spacing:.02em;color:var(--faint);}
.crumb a{color:var(--mute);transition:color .2s var(--ease);}
.crumb a:hover{color:var(--text);}
.crumb-sep{color:#C8CFC7;}
.crumb-cur{color:var(--faint);}

/* ---------- article head ---------- */
.article-hero{padding:26px 0 8px;}
@media (min-width:768px){.article-hero{padding:40px 0 10px;}}
.article-head{max-width:820px;margin-top:20px;}
.badge{display:inline-flex;align-items:center;border-radius:6px;background:var(--soft);color:var(--sage);font-size:12.5px;letter-spacing:.02em;padding:4px 10px;}
.article-h1{
  margin-top:16px;
  font-size:clamp(1.6rem,3.6vw,2.5rem);
  font-weight:800;
  line-height:1.2;
  letter-spacing:-.02em;
  color:var(--ink);
}
.meta{display:flex;flex-wrap:wrap;align-items:center;gap:10px;margin-top:18px;font-size:12.5px;letter-spacing:.02em;color:var(--mute);}
.meta .dot{color:#C8CFC7;}
.rule{height:1px;background:var(--line);margin-top:26px;}

/* ---------- article body ---------- */
.article-shell{padding:8px 0 56px;}
@media (min-width:768px){.article-shell{padding:14px 0 80px;}}
.article-body{max-width:760px;margin:0 auto;font-size:17px;line-height:1.9;color:var(--text);overflow-wrap:break-word;}
.article-body p{margin:0 0 1.25em;}
.article-body h2{position:relative;margin:44px 0 18px;padding-left:14px;font-size:clamp(1.2rem,2vw,1.45rem);font-weight:700;line-height:1.4;letter-spacing:-.01em;}
.article-body h2::before{content:"";position:absolute;left:0;top:.32em;bottom:.32em;width:3px;border-radius:2px;background:var(--lime);}
.article-body h3{margin:30px 0 12px;font-size:20px;font-weight:700;line-height:1.5;}
.article-body h4{margin:24px 0 10px;font-size:17px;font-weight:700;}
.article-body ul{margin:0 0 1.3em;}
.article-body ul li{position:relative;padding-left:20px;margin-bottom:.5em;}
.article-body ul li::before{content:"";position:absolute;left:0;top:.66em;width:7px;height:7px;border-radius:2px;background:var(--lime);}
.article-body ol{counter-reset:cn;margin:0 0 1.3em;}
.article-body ol li{position:relative;padding-left:30px;margin-bottom:.55em;counter-increment:cn;}
.article-body ol li::before{content:counter(cn);position:absolute;left:0;top:.3em;width:20px;height:20px;border-radius:6px;background:var(--soft);color:var(--sage);font-size:12.5px;font-weight:700;line-height:20px;text-align:center;}
.article-body blockquote{margin:1.6em 0;padding:14px 18px;background:var(--soft);border-left:3px solid var(--lime);border-radius:0 10px 10px 0;color:#3C4A45;font-size:16px;}
.article-body img{margin:24px auto;border-radius:12px;}
.article-body figure{margin:24px 0;}
.article-body figcaption{margin-top:10px;text-align:center;font-size:12.5px;color:var(--faint);}
.article-body table{width:100%;border-collapse:collapse;margin:1.6em 0;font-size:15px;}
.article-body th,.article-body td{border:1px solid var(--line);padding:10px 12px;text-align:left;}
.article-body th{background:var(--soft);font-weight:600;}
.article-body a{color:var(--ink);border-bottom:2px solid rgba(183,240,74,.7);transition:background-color .2s var(--ease),border-color .2s var(--ease);}
.article-body a:hover{background:rgba(183,240,74,.16);border-bottom-color:var(--lime);}
.article-body hr{border:0;border-top:1px solid var(--line);margin:36px 0;}
@media (max-width:520px){
  .article-body{font-size:16.5px;line-height:1.85;}
  .article-body table{display:block;overflow-x:auto;white-space:nowrap;}
}
.article-empty{
  border:1px solid var(--line);background:var(--card);border-radius:var(--radius-card);
  padding:44px 26px;text-align:center;box-shadow:var(--shadow-1);
}
.article-empty h2{font-size:20px;font-weight:700;margin-bottom:10px;}
.article-empty p{font-size:14.5px;color:var(--mute);margin-bottom:22px;}

/* ---------- tags ---------- */
.tag-row{display:flex;flex-wrap:wrap;gap:10px;max-width:760px;margin:44px auto 0;}
.tag{display:inline-flex;align-items:center;border:1px solid var(--line);border-radius:999px;padding:6px 14px;font-size:12.5px;letter-spacing:.02em;color:var(--mute);background:var(--card);transition:border-color .2s var(--ease),color .2s var(--ease),background-color .2s var(--ease);}
.tag:hover{border-color:var(--lime);color:var(--text);background:var(--soft);}

/* ---------- prev / next ---------- */
.pn-grid{display:grid;gap:16px;max-width:760px;margin:32px auto 0;}
@media (min-width:768px){.pn-grid{grid-template-columns:1fr 1fr;}}
.pn-card{display:block;border:1px solid var(--line);border-radius:var(--radius-card);background:var(--card);padding:20px 22px;box-shadow:var(--shadow-1);transition:transform .2s var(--ease),box-shadow .2s var(--ease),border-color .2s var(--ease);}
.pn-card:hover{transform:translateY(-3px);box-shadow:var(--shadow-2);border-color:rgba(183,240,74,.65);}
.pn-label{font-size:12.5px;letter-spacing:.02em;color:var(--faint);}
.pn-title{margin-top:8px;font-size:16px;font-weight:600;color:var(--ink);}
.pn-more{margin-top:10px;font-size:13px;color:var(--sage);display:inline-flex;align-items:center;gap:6px;}

/* ---------- section heads ---------- */
.sec{padding:56px 0;}
@media (min-width:768px){.sec{padding:80px 0;}}
.sec-h{position:relative;padding-left:14px;font-size:clamp(1.35rem,2.4vw,1.9rem);font-weight:700;line-height:1.3;letter-spacing:-.01em;}
.sec-h::before{content:"";position:absolute;left:0;top:.3em;bottom:.3em;width:3px;border-radius:2px;background:var(--lime);}
.sec-sub{margin-top:12px;font-size:14.5px;color:var(--mute);max-width:640px;}

/* ---------- faq ---------- */
.faq{max-width:760px;margin:36px auto 0;}
.faq-item{border-top:1px solid var(--line);}
.faq-item:last-child{border-bottom:1px solid var(--line);}
.faq-q{position:relative;list-style:none;cursor:pointer;padding:18px 46px 18px 0;font-size:16px;font-weight:600;color:var(--ink);transition:padding-left .2s var(--ease);}
.faq-q::-webkit-details-marker{display:none;}
.faq-q::after{
  content:"";position:absolute;right:8px;top:50%;width:12px;height:12px;margin-top:-6px;
  background:
    linear-gradient(var(--ink),var(--ink)) center/12px 1.5px no-repeat,
    linear-gradient(var(--ink),var(--ink)) center/1.5px 12px no-repeat;
  transition:transform .2s var(--ease);
}
.faq-item[open] .faq-q::after{transform:rotate(45deg);}
.faq-item[open] .faq-q{padding-left:14px;}
.faq-item[open] .faq-q::before{content:"";position:absolute;left:0;top:18px;bottom:18px;width:3px;border-radius:2px;background:var(--lime);}
.faq-a{padding:0 46px 20px 14px;font-size:14.5px;line-height:1.8;color:var(--mute);}

/* ---------- dark cta ---------- */
.cta-dark{background:var(--ink);color:#fff;}
.cta-inner{padding:64px 0;text-align:center;}
@media (min-width:768px){.cta-inner{padding:88px 0;}}
.cta-inner h2{font-size:clamp(1.5rem,3vw,2.2rem);font-weight:800;line-height:1.25;letter-spacing:-.02em;}
.cta-inner p{margin:16px auto 0;max-width:560px;font-size:15px;line-height:1.8;color:rgba(255,255,255,.68);}
.cta-inner .btn{margin-top:28px;}

/* ---------- footer ---------- */
.site-footer{background:var(--ink);color:rgba(255,255,255,.72);padding:56px 0 0;}
@media (min-width:768px){.site-footer{padding:72px 0 0;}}
.footer-desc{margin-top:16px;font-size:13.5px;line-height:1.8;color:rgba(255,255,255,.58);max-width:280px;}
.footer-h{margin:0 0 16px;font-size:13px;font-weight:600;letter-spacing:.08em;color:rgba(255,255,255,.92);}
.footer-links{display:flex;flex-direction:column;gap:10px;}
.footer-link{font-size:13.5px;color:rgba(255,255,255,.72);transition:color .2s var(--ease);}
.footer-link:hover{color:var(--lime);text-decoration:underline;text-underline-offset:3px;}
.site-footer .brand-name{color:#fff;}
.site-footer .brand-sub{color:rgba(255,255,255,.5);}
.site-footer .brand-mark{background:rgba(255,255,255,.1);}
.footer-bottom{
  margin-top:44px;padding:20px 0 24px;border-top:1px solid rgba(255,255,255,.12);
  display:flex;flex-wrap:wrap;gap:8px 20px;justify-content:space-between;
  font-size:12.5px;color:rgba(255,255,255,.5);
}

/* ---------- mobile tab ---------- */
.mobile-tab{
  position:fixed;left:0;right:0;bottom:0;z-index:70;
  display:grid;grid-template-columns:repeat(5,1fr);
  height:calc(56px + env(safe-area-inset-bottom));
  padding-bottom:env(safe-area-inset-bottom);
  background:rgba(255,255,255,.97);
  backdrop-filter:blur(10px);
  -webkit-backdrop-filter:blur(10px);
  border-top:1px solid var(--line);
}
.mobile-tab a{position:relative;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:3px;font-size:12px;color:var(--mute);}
.mobile-tab a svg{stroke:var(--mute);}
.mobile-tab a.is-active{color:var(--sage);font-weight:600;}
.mobile-tab a.is-active svg{stroke:var(--sage);}
.mobile-tab a.is-active::before{content:"";position:absolute;top:0;width:22px;height:2px;border-radius:2px;background:var(--lime);}
@media (min-width:768px){.mobile-tab{display:none;}}
@media (max-width:767px){body{padding-bottom:calc(56px + env(safe-area-inset-bottom));}}

@media (prefers-reduced-motion:reduce){
  *{transition-duration:.01ms !important;animation-duration:.01ms !important;}
  .pn-card:hover,.btn:hover .btn-arrow{transform:none;}
}

/* roulang page: category1 */
:root{
    --accent:#B7F04A;
    --accent-hover:#A9E23C;
    --accent-ink:#14200C;
    --ink-900:#0D1210;
    --ink-800:#16201C;
    --text:#12171A;
    --muted:#5F6A66;
    --faint:#8B948E;
    --line:#E2E5DE;
    --paper:#F6F6F2;
    --card:#FFFFFF;
    --sand:#EFF1EA;
    --moss:#4C6B63;
    --r-card:14px;
    --r-img:16px;
    --sh-1:0 1px 2px rgba(13,18,16,.04);
    --sh-2:0 10px 28px rgba(13,18,16,.09);
    --ease:cubic-bezier(.2,.7,.3,1);
    --dur:200ms;
  }

  *,*::before,*::after{box-sizing:border-box;}
  html{-webkit-text-size-adjust:100%;}
  body{
    margin:0;
    background:var(--paper);
    color:var(--text);
    font-family:"Noto Sans SC","PingFang SC","Microsoft YaHei","Hiragino Sans GB",system-ui,sans-serif;
    font-size:16px;
    line-height:1.75;
    -webkit-font-smoothing:antialiased;
    text-rendering:optimizeLegibility;
  }
  img{max-width:100%;display:block;}
  a{color:inherit;text-decoration:none;}
  button,input,textarea,select{font:inherit;color:inherit;}
  h1,h2,h3,h4,p,ul,ol,figure{margin:0;}
  ul,ol{padding:0;list-style:none;}
  .num{font-variant-numeric:tabular-nums;}

  ::selection{background:rgba(183,240,74,.55);color:#14200C;}
  ::-webkit-scrollbar{width:10px;height:10px;}
  ::-webkit-scrollbar-track{background:transparent;}
  ::-webkit-scrollbar-thumb{background:#CFD6CC;border-radius:8px;}
  ::-webkit-scrollbar-thumb:hover{background:#B9C2B5;}

  a:focus-visible,button:focus-visible,summary:focus-visible,input:focus-visible,textarea:focus-visible{
    outline:2px solid var(--accent);
    outline-offset:2px;
    border-radius:6px;
  }

  .wrap{
    width:100%;
    max-width:1200px;
    margin:0 auto;
    padding-left:20px;
    padding-right:20px;
  }
  @media (min-width:768px){
    .wrap{padding-left:32px;padding-right:32px;}
  }

  /* ---------- 顶部导航 ---------- */
  .site-header{
    position:sticky;
    top:0;
    z-index:70;
    background:rgba(246,246,242,.92);
    backdrop-filter:saturate(140%) blur(8px);
    -webkit-backdrop-filter:saturate(140%) blur(8px);
    border-bottom:1px solid transparent;
    transition:border-color var(--dur) var(--ease), background-color var(--dur) var(--ease);
  }
  .site-header.is-scrolled{
    border-bottom-color:var(--line);
    background:rgba(246,246,242,.97);
  }
  .brand{
    display:inline-flex;
    align-items:center;
    gap:10px;
  }
  .brand-mark{
    width:22px;
    height:22px;
    flex:none;
    border-radius:6px 2px 6px 2px;
    background:var(--ink-900);
    position:relative;
  }
  .brand-mark::after{
    content:"";
    position:absolute;
    right:-3px;
    bottom:-3px;
    width:9px;
    height:9px;
    background:var(--accent);
    border-radius:2px;
  }
  .brand-text{display:flex;flex-direction:column;line-height:1.12;}
  .brand-name{font-size:16px;font-weight:800;letter-spacing:-.01em;color:var(--text);}
  .brand-sub{font-size:11px;letter-spacing:.14em;color:var(--moss);}

  .nav-link{
    position:relative;
    font-size:14.5px;
    font-weight:500;
    color:#2C3633;
    padding:6px 0;
    transition:color var(--dur) var(--ease);
  }
  .nav-link::after{
    content:"";
    position:absolute;
    left:0;
    bottom:0;
    height:2px;
    width:0;
    background:var(--accent);
    transition:width var(--dur) var(--ease);
  }
  .nav-link:hover{color:var(--text);}
  .nav-link:hover::after{width:100%;}
  .nav-link.is-active{color:var(--text);font-weight:600;}
  .nav-link.is-active::after{width:100%;}

  /* ---------- 按钮 ---------- */
  .btn{
    display:inline-flex;
    align-items:center;
    justify-content:center;
    gap:8px;
    border-radius:999px;
    border:1px solid transparent;
    font-weight:600;
    line-height:1;
    cursor:pointer;
    transition:background-color var(--dur) var(--ease), border-color var(--dur) var(--ease), transform var(--dur) var(--ease), color var(--dur) var(--ease);
  }
  .btn:active{transform:scale(.98);}
  .btn-primary{
    background:var(--accent);
    color:var(--accent-ink);
    padding:14px 26px;
    font-size:15px;
  }
  .btn-primary:hover{background:var(--accent-hover);}
  .btn-sm{padding:10px 20px;font-size:14px;}
  .btn-arrow{display:inline-block;transition:transform var(--dur) var(--ease);}
  .btn:hover .btn-arrow{transform:translateX(3px);}
  .btn-ghost{
    background:transparent;
    border-color:var(--line);
    color:var(--text);
    padding:13px 24px;
    font-size:15px;
  }
  .btn-ghost:hover{background:var(--sand);border-color:var(--accent);}
  .btn-ghost-dark{
    background:transparent;
    border-color:rgba(255,255,255,.28);
    color:#fff;
    padding:13px 24px;
    font-size:15px;
  }
  .btn-ghost-dark:hover{border-color:var(--accent);color:var(--accent);}
  .link-cta{
    display:inline-flex;
    align-items:center;
    gap:6px;
    font-size:14px;
    font-weight:600;
    color:var(--text);
    position:relative;
  }
  .link-cta::after{
    content:"";
    position:absolute;
    left:0;
    bottom:-3px;
    height:2px;
    width:0;
    background:var(--accent);
    transition:width var(--dur) var(--ease);
  }
  .link-cta:hover::after{width:100%;}
  .link-cta:hover .btn-arrow{transform:translateX(3px);}

  /* ---------- 标签与徽章 ---------- */
  .badge{
    display:inline-flex;
    align-items:center;
    gap:6px;
    border-radius:6px;
    background:var(--sand);
    color:var(--moss);
    font-size:12.5px;
    letter-spacing:.02em;
    padding:4px 10px;
  }
  .badge-dark{
    background:rgba(255,255,255,.08);
    color:rgba(255,255,255,.82);
  }
  .eyebrow{
    display:inline-flex;
    align-items:center;
    gap:10px;
    font-size:12.5px;
    letter-spacing:.16em;
    color:var(--moss);
    text-transform:uppercase;
  }
  .eyebrow::before{
    content:"";
    width:12px;
    height:2px;
    background:var(--accent);
    display:block;
  }

  /* ---------- 标题体系 ---------- */
  .h1{
    font-size:clamp(1.9rem,4.4vw,3.2rem);
    font-weight:800;
    line-height:1.14;
    letter-spacing:-.02em;
  }
  .h2{
    font-size:clamp(1.4rem,2.4vw,2rem);
    font-weight:700;
    line-height:1.3;
    letter-spacing:-.01em;
    position:relative;
    padding-left:18px;
  }
  .h2::before{
    content:"";
    position:absolute;
    left:0;
    top:.35em;
    width:12px;
    height:.72em;
    background:var(--accent);
    border-radius:2px;
  }
  .h3{
    font-size:1.0625rem;
    font-weight:600;
    line-height:1.5;
  }
  .lead{font-size:17px;line-height:1.8;color:var(--muted);}
  .para{font-size:15.5px;line-height:1.85;color:var(--muted);}
  .meta-line{font-size:12.5px;letter-spacing:.02em;color:var(--faint);}

  /* ---------- 面包屑 ---------- */
  .crumb{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:12.5px;color:var(--faint);}
  .crumb a{color:var(--muted);transition:color var(--dur) var(--ease);}
  .crumb a:hover{color:var(--text);}
  .crumb .sep{color:#C6CCC2;}
  .crumb .current{color:var(--text);font-weight:600;}

  /* ---------- 分类短 Hero ---------- */
  .page-hero{
    background:var(--sand);
    border-bottom:1px solid var(--line);
    padding:34px 0 46px;
  }
  @media (min-width:768px){
    .page-hero{padding:42px 0 56px;}
  }
  .hero-note{
    margin-top:18px;
    font-size:15px;
    line-height:1.8;
    color:#4A5450;
    max-width:640px;
  }

  /* ---------- 媒体容器 ---------- */
  .media{
    position:relative;
    overflow:hidden;
    border-radius:var(--r-img);
    background-color:#EFF1EA;
    background-image:repeating-linear-gradient(45deg, rgba(76,107,99,.10) 0 8px, transparent 8px 16px);
    border:1px solid var(--line);
  }
  .media img{
    width:100%;
    height:100%;
    object-fit:cover;
    transition:transform var(--dur) var(--ease);
  }
  .ratio-16x10{aspect-ratio:16/10;}
  .ratio-16x9{aspect-ratio:16/9;}
  .ratio-21x9{aspect-ratio:21/9;}

  /* ---------- 编号要点 ---------- */
  .step-list{display:flex;flex-direction:column;gap:8px;}
  .step-item{
    display:flex;
    gap:18px;
    padding:20px 0;
    border-top:1px solid var(--line);
  }
  .step-list .step-item:last-child{border-bottom:1px solid var(--line);}
  .step-num{
    flex:none;
    width:40px;
    font-size:22px;
    font-weight:800;
    line-height:1.2;
    color:var(--accent-ink);
    background:var(--accent);
    border-radius:8px;
    height:32px;
    display:flex;
    align-items:center;
    justify-content:center;
    letter-spacing:-.02em;
  }
  .step-body h3{margin-bottom:6px;}
  .step-body p{font-size:14.5px;line-height:1.8;color:var(--muted);}

  /* ---------- 区域对照行 ---------- */
  .rowline{
    display:grid;
    gap:6px;
    padding:20px 0;
    border-top:1px solid var(--line);
  }
  @media (min-width:768px){
    .rowline{grid-template-columns:220px 1fr;gap:24px;align-items:baseline;}
  }
  .rowline:last-of-type{border-bottom:1px solid var(--line);}
  .rowline .row-title{font-size:15.5px;font-weight:600;}
  .rowline .row-desc{font-size:14.5px;line-height:1.8;color:var(--muted);}

  /* ---------- 卡片 ---------- */
  .card{
    background:var(--card);
    border:1px solid var(--line);
    border-radius:var(--r-card);
    box-shadow:var(--sh-1);
    transition:transform var(--dur) var(--ease), box-shadow var(--dur) var(--ease), border-color var(--dur) var(--ease);
  }
  .card:hover{
    transform:translateY(-3px);
    box-shadow:var(--sh-2);
    border-color:rgba(183,240,74,.65);
  }
  .card-pad{padding:22px;}
  .device-card{
    background:var(--card);
    border:1px solid var(--line);
    border-radius:var(--r-card);
    padding:22px;
    box-shadow:var(--sh-1);
    transition:border-color var(--dur) var(--ease), transform var(--dur) var(--ease);
  }
  .device-card:hover{border-color:rgba(183,240,74,.65);transform:translateY(-3px);}
  .device-card .bar{
    width:3px;
    height:22px;
    background:var(--accent);
    border-radius:2px;
    margin-bottom:14px;
  }

  /* ---------- FAQ ---------- */
  .faq-item{border-top:1px solid var(--line);}
  .faq-item:last-of-type{border-bottom:1px solid var(--line);}
  .faq-item summary{
    list-style:none;
    cursor:pointer;
    display:flex;
    align-items:center;
    justify-content:space-between;
    gap:20px;
    padding:18px 0 18px 0;
    font-size:16px;
    font-weight:600;
    position:relative;
    transition:padding-left var(--dur) var(--ease), color var(--dur) var(--ease);
  }
  .faq-item summary::-webkit-details-marker{display:none;}
  .faq-item summary::before{
    content:"";
    position:absolute;
    left:0;
    top:16px;
    bottom:16px;
    width:3px;
    background:var(--accent);
    border-radius:2px;
    transform:scaleY(0);
    transform-origin:top;
    transition:transform var(--dur) var(--ease);
  }
  .faq-item[open] summary{padding-left:14px;}
  .faq-item[open] summary::before{transform:scaleY(1);}
  .faq-item summary:hover{color:var(--moss);}
  .faq-icon{
    position:relative;
    width:22px;
    height:22px;
    flex:none;
    transition:transform var(--dur) var(--ease);
  }
  .faq-icon::before,.faq-icon::after{
    content:"";
    position:absolute;
    background:var(--moss);
    border-radius:2px;
  }
  .faq-icon::before{width:12px;height:1.5px;left:5px;top:10.3px;}
  .faq-icon::after{width:1.5px;height:12px;left:10.3px;top:5px;}
  .faq-item[open] .faq-icon{transform:rotate(45deg);}
  .faq-answer{
    padding:0 0 20px 0;
    font-size:14.5px;
    line-height:1.85;
    color:var(--muted);
    max-width:680px;
  }
  .faq-item[open] .faq-answer{padding-left:14px;}

  /* ---------- 深色 CTA ---------- */
  .cta-dark{
    background:var(--ink-900);
    color:#fff;
    border-top:1px solid rgba(255,255,255,.08);
    padding:64px 0;
  }
  @media (min-width:768px){
    .cta-dark{padding:88px 0;}
  }
  .cta-dark p{color:rgba(255,255,255,.68);}

  /* ---------- 页脚 ---------- */
  .site-footer{
    background:var(--ink-900);
    color:rgba(255,255,255,.72);
    padding:56px 0 0;
    border-top:1px solid rgba(255,255,255,.08);
  }
  .site-footer .brand-name{color:#fff;}
  .site-footer .brand-sub{color:rgba(183,240,74,.85);}
  .site-footer .brand-mark{background:#fff;}
  .footer-desc{
    margin-top:14px;
    font-size:14px;
    line-height:1.8;
    color:rgba(255,255,255,.62);
    max-width:280px;
  }
  .footer-h{
    font-size:13px;
    font-weight:600;
    letter-spacing:.06em;
    color:#fff;
    margin-bottom:14px;
  }
  .footer-links{display:flex;flex-direction:column;gap:10px;}
  .footer-link{
    font-size:14px;
    color:rgba(255,255,255,.72);
    transition:color var(--dur) var(--ease);
    width:fit-content;
  }
  a.footer-link:hover{color:var(--accent);text-decoration:underline;text-underline-offset:4px;}
  .footer-bottom{
    margin-top:44px;
    border-top:1px solid rgba(255,255,255,.12);
    padding:18px 0 22px;
    display:flex;
    flex-wrap:wrap;
    gap:8px 24px;
    justify-content:space-between;
    font-size:12.5px;
    color:rgba(255,255,255,.5);
  }

  /* ---------- 移动端底部 Tab ---------- */
  .tabbar{
    position:fixed;
    left:0;
    right:0;
    bottom:0;
    z-index:80;
    display:flex;
    background:rgba(255,255,255,.97);
    backdrop-filter:blur(10px);
    -webkit-backdrop-filter:blur(10px);
    border-top:1px solid var(--line);
    padding-bottom:env(safe-area-inset-bottom);
  }
  .tab-item{
    flex:1;
    height:56px;
    display:flex;
    flex-direction:column;
    align-items:center;
    justify-content:center;
    gap:3px;
    font-size:12px;
    color:var(--muted);
    position:relative;
    transition:color var(--dur) var(--ease);
  }
  .tab-item svg{width:22px;height:22px;stroke:currentColor;fill:none;stroke-width:1.5;stroke-linecap:round;stroke-linejoin:round;}
  .tab-item::before{
    content:"";
    position:absolute;
    top:0;
    left:50%;
    width:24px;
    height:2px;
    background:var(--accent);
    transform:translateX(-50%) scaleX(0);
    transition:transform var(--dur) var(--ease);
  }
  .tab-item.is-active{color:var(--text);font-weight:600;}
  .tab-item.is-active svg{stroke:var(--moss);}
  .tab-item.is-active::before{transform:translateX(-50%) scaleX(1);}
  @media (min-width:768px){
    .tabbar{display:none;}
  }

  /* ---------- 移动端固定转化条 ---------- */
  .sticky-cta{
    position:fixed;
    left:0;
    right:0;
    bottom:calc(56px + env(safe-area-inset-bottom));
    z-index:79;
    display:flex;
    align-items:center;
    justify-content:space-between;
    gap:14px;
    padding:10px 20px;
    background:var(--ink-900);
    color:#fff;
    border-top:1px solid rgba(255,255,255,.12);
  }
  .sticky-cta .txt{font-size:12.5px;color:rgba(255,255,255,.78);line-height:1.4;}
  @media (min-width:768px){
    .sticky-cta{display:none;}
  }

  body{padding-bottom:0;}
  @media (max-width:767px){
    body{padding-bottom:120px;}
  }

  /* ---------- 入场动效 ---------- */
  .reveal{opacity:0;transform:translateY(12px);transition:opacity 480ms var(--ease),transform 480ms var(--ease);}
  .reveal.is-in{opacity:1;transform:none;}

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

/* roulang page: category3 */
:root{
  --lime:#B7F04A;
  --lime-fg:#14200C;
  --ink:#0D1210;
  --ink-2:#16201C;
  --paper:#F6F6F2;
  --card:#FFFFFF;
  --soft:#EFF1EA;
  --sage:#4C6B63;
  --text:#12171A;
  --text-2:#5F6A66;
  --text-3:#8B948E;
  --line:#E2E5DE;
  --line-dark:rgba(255,255,255,.12);
  --r-card:14px;
  --r-img:16px;
  --r-input:10px;
  --r-badge:6px;
  --sh-1:0 1px 2px rgba(13,18,16,.04);
  --sh-2:0 10px 28px rgba(13,18,16,.09);
  --ease:cubic-bezier(.2,.7,.3,1);
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;}
body{
  margin:0;
  background:var(--paper);
  color:var(--text);
  font-family:"Noto Sans SC","PingFang SC","Microsoft YaHei","Hiragino Sans GB",system-ui,sans-serif;
  font-size:16px;
  line-height:1.75;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;}
a{color:inherit;text-decoration:none;}
button,input,textarea{font:inherit;color:inherit;}
button{cursor:pointer;border:0;background:none;}
h1,h2,h3,h4,p,ul,ol{margin:0;}
ul,ol{padding:0;list-style:none;}
:focus-visible{outline:2px solid var(--lime);outline-offset:2px;border-radius:4px;}

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

/* ---------- header ---------- */
.site-header{
  position:sticky;top:0;z-index:70;
  background:rgba(246,246,242,.88);
  -webkit-backdrop-filter:saturate(140%) blur(10px);
  backdrop-filter:saturate(140%) blur(10px);
  border-bottom:1px solid transparent;
  transition:border-color .2s var(--ease),background-color .2s var(--ease);
}
.site-header.is-scrolled{border-bottom-color:var(--line);background:rgba(246,246,242,.96);}
.brand{display:inline-flex;align-items:center;gap:10px;}
.brand-mark{
  width:22px;height:22px;flex:0 0 22px;background:var(--lime);
  clip-path:polygon(0 0,100% 0,100% 68%,68% 100%,0 100%);
  position:relative;
}
.brand-mark::after{
  content:"";position:absolute;left:5px;top:5px;width:6px;height:6px;
  background:var(--lime-fg);opacity:.75;
}
.brand-text{display:flex;flex-direction:column;line-height:1.05;}
.brand-name{font-size:16px;font-weight:800;letter-spacing:-.01em;color:var(--text);}
.brand-sub{font-size:11px;letter-spacing:.14em;color:var(--text-3);margin-top:2px;}
.brand:hover .brand-mark{background:#a9e63c;}

.nav-link{
  position:relative;font-size:14.5px;color:var(--text-2);
  padding:6px 0;transition:color .2s var(--ease);
}
.nav-link::after{
  content:"";position:absolute;left:0;right:0;bottom:0;height:2px;background:var(--lime);
  transform:scaleX(0);transform-origin:left;transition:transform .2s var(--ease);
}
.nav-link:hover{color:var(--text);}
.nav-link:hover::after{transform:scaleX(1);}
.nav-link.is-active{color:var(--text);font-weight:600;}
.nav-link.is-active::after{transform:scaleX(1);}

/* ---------- buttons ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  border-radius:999px;font-weight:600;font-size:15px;
  padding:12px 24px;border:1px solid transparent;
  transition:background-color .2s var(--ease),border-color .2s var(--ease),transform .2s var(--ease),color .2s var(--ease);
}
.btn-sm{padding:9px 18px;font-size:14px;}
.btn-primary{background:var(--lime);color:var(--lime-fg);}
.btn-primary:hover{background:#a9e63c;}
.btn-primary:active{transform:scale(.98);}
.btn-ghost{background:transparent;border-color:var(--line);color:var(--text);}
.btn-ghost:hover{border-color:var(--lime);background:var(--soft);}
.btn-ghost-dark{background:transparent;border-color:rgba(255,255,255,.28);color:#fff;}
.btn-ghost-dark:hover{border-color:var(--lime);color:var(--lime);}
.btn-arrow{transition:transform .2s var(--ease);}
.btn:hover .btn-arrow{transform:translateX(3px);}

.link-cta{
  display:inline-flex;align-items:center;gap:6px;font-size:14px;font-weight:600;
  color:var(--text);position:relative;
}
.link-cta::after{
  content:"";position:absolute;left:0;bottom:-3px;height:2px;width:100%;
  background:var(--lime);transform:scaleX(0);transform-origin:left;
  transition:transform .2s var(--ease);
}
.link-cta:hover::after{transform:scaleX(1);}
.link-cta .btn-arrow{transition:transform .2s var(--ease);}
.link-cta:hover .btn-arrow{transform:translateX(3px);}

/* ---------- badges / tags ---------- */
.badge{
  display:inline-block;border-radius:var(--r-badge);background:var(--soft);
  color:var(--sage);font-size:12.5px;letter-spacing:.02em;padding:4px 10px;
}
.badge-dark{background:rgba(255,255,255,.08);color:rgba(255,255,255,.82);}
.tag{
  display:inline-flex;align-items:center;border-radius:999px;border:1px solid var(--line);
  padding:6px 14px;font-size:13px;color:var(--text-2);background:#fff;
  transition:border-color .2s var(--ease),color .2s var(--ease);
}
.tag:hover{border-color:var(--lime);color:var(--text);}

/* ---------- section titles ---------- */
.sec-title{position:relative;padding-top:14px;font-size:clamp(1.4rem,2.4vw,2rem);font-weight:700;line-height:1.3;letter-spacing:-.01em;}
.sec-title::before{content:"";position:absolute;top:0;left:0;width:12px;height:3px;background:var(--lime);border-radius:2px;}
.sec-lead{color:var(--text-2);font-size:15px;margin-top:12px;max-width:640px;}

.eyebrow{font-size:12.5px;letter-spacing:.16em;color:var(--text-3);text-transform:uppercase;}

/* ---------- hero ---------- */
.page-hero{
  background:var(--soft);
  border-bottom:1px solid var(--line);
  padding:40px 0 44px;
}
@media(min-width:768px){.page-hero{padding:56px 0 60px;}}
.crumb{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:12.5px;color:var(--text-3);}
.crumb a{color:var(--text-2);transition:color .2s var(--ease);}
.crumb a:hover{color:var(--text);text-decoration:underline;text-decoration-color:var(--lime);text-underline-offset:4px;}
.crumb .sep{color:var(--line);}
.crumb .current{color:var(--text);}
h1.page-h1{
  font-size:clamp(1.9rem,4.4vw,3.2rem);
  font-weight:800;line-height:1.14;letter-spacing:-.02em;
  margin-top:22px;max-width:820px;
}
.page-sub{margin-top:16px;font-size:16px;line-height:1.75;color:var(--text-2);max-width:640px;}
.hero-actions{margin-top:26px;display:flex;flex-wrap:wrap;gap:14px;align-items:center;}

/* ---------- sections ---------- */
.section{padding:56px 0;}
@media(min-width:768px){.section{padding:80px 0;}}
@media(min-width:1024px){.section{padding:104px 0;}}

/* ---------- timeline ---------- */
.timeline{position:relative;margin-top:40px;}
.timeline::before{
  content:"";position:absolute;left:19px;top:10px;bottom:10px;width:1px;background:var(--line);
}
.tl-item{position:relative;padding:0 0 38px 62px;}
.tl-item:last-child{padding-bottom:0;}
.tl-dot{
  position:absolute;left:0;top:0;width:40px;height:40px;border-radius:999px;
  background:#fff;border:1px solid var(--line);
  display:flex;align-items:center;justify-content:center;
  font-size:13.5px;font-weight:800;color:var(--sage);
  font-variant-numeric:tabular-nums;letter-spacing:-.02em;
  transition:border-color .2s var(--ease),background-color .2s var(--ease);
}
.tl-dot.is-key{background:var(--lime);border-color:var(--lime);color:var(--lime-fg);}
.tl-item:hover .tl-dot{border-color:rgba(183,240,74,.75);}
.tl-title{font-size:1.0625rem;font-weight:600;line-height:1.5;}
.tl-text{margin-top:8px;color:var(--text-2);font-size:15px;max-width:660px;}
.tl-meta{margin-top:10px;display:flex;flex-wrap:wrap;gap:8px;}
@media(max-width:639px){
  .timeline::before{left:15px;}
  .tl-item{padding-left:48px;}
  .tl-dot{width:32px;height:32px;font-size:12px;}
}

/* ---------- checklist ---------- */
.check-list{margin-top:22px;display:grid;gap:14px;}
.check-item{display:flex;gap:12px;align-items:flex-start;font-size:15px;color:var(--text-2);line-height:1.7;}
.check-item strong{color:var(--text);font-weight:600;}
.check-ico{flex:0 0 18px;margin-top:4px;color:var(--lime);}

/* ---------- image placeholder ---------- */
.ph{
  background-color:var(--soft);
  background-image:repeating-linear-gradient(45deg,rgba(76,107,99,.10) 0 6px,transparent 6px 12px);
}
.img-card{border-radius:var(--r-img);overflow:hidden;border:1px solid var(--line);background:#fff;}
.img-card img{width:100%;height:100%;object-fit:cover;aspect-ratio:16/10;transition:transform .35s var(--ease);}
.img-card:hover img{transform:scale(1.03);}

/* ---------- data strip ---------- */
.data-strip{background:var(--ink);color:#fff;padding:44px 0;}
@media(min-width:768px){.data-strip{padding:56px 0;}}
.data-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:28px 20px;}
@media(min-width:768px){.data-grid{grid-template-columns:repeat(4,minmax(0,1fr));}}
.data-num{font-size:30px;font-weight:800;letter-spacing:-.02em;color:var(--lime);font-variant-numeric:tabular-nums;line-height:1.1;}
.data-label{margin-top:8px;font-size:12.5px;letter-spacing:.02em;color:rgba(255,255,255,.68);}

/* ---------- notes ---------- */
.note-list{margin-top:26px;border-top:1px solid var(--line);}
.note-item{border-bottom:1px solid var(--line);padding:20px 0;display:grid;gap:8px;}
@media(min-width:768px){.note-item{grid-template-columns:200px 1fr;gap:24px;align-items:start;}}
.note-h{font-size:15.5px;font-weight:600;}
.note-p{font-size:14.5px;color:var(--text-2);line-height:1.8;}

/* ---------- faq ---------- */
.faq-wrap{max-width:760px;margin:36px auto 0;}
.faq-item{border-top:1px solid var(--line);transition:box-shadow .2s var(--ease),padding-left .2s var(--ease);}
.faq-item:last-child{border-bottom:1px solid var(--line);}
.faq-item[open]{box-shadow:inset 3px 0 0 0 var(--lime);padding-left:16px;}
.faq-q{
  list-style:none;cursor:pointer;display:flex;align-items:flex-start;justify-content:space-between;gap:16px;
  padding:18px 0;font-size:16px;font-weight:600;line-height:1.6;
}
.faq-q::-webkit-details-marker{display:none;}
.faq-ico{position:relative;flex:0 0 16px;width:16px;height:16px;margin-top:5px;transition:transform .2s var(--ease);}
.faq-ico::before,.faq-ico::after{content:"";position:absolute;background:var(--sage);border-radius:2px;}
.faq-ico::before{left:0;top:7px;width:16px;height:2px;}
.faq-ico::after{left:7px;top:0;width:2px;height:16px;}
.faq-item[open] .faq-ico{transform:rotate(45deg);}
.faq-a{font-size:14.5px;line-height:1.8;color:var(--text-2);padding:0 0 20px;max-width:660px;}

/* ---------- cta ---------- */
.cta-band{background:var(--ink);color:#fff;padding:64px 0;text-align:center;}
@media(min-width:768px){.cta-band{padding:88px 0;}}
.cta-band h2{font-size:clamp(1.4rem,2.6vw,2.1rem);font-weight:700;line-height:1.3;letter-spacing:-.01em;}
.cta-band p{margin:14px auto 0;max-width:560px;color:rgba(255,255,255,.70);font-size:15px;}
.cta-actions{margin-top:28px;display:flex;justify-content:center;flex-wrap:wrap;gap:14px;}

/* ---------- footer ---------- */
.site-footer{background:var(--ink);color:#fff;padding:56px 0 0;border-top:1px solid var(--line-dark);}
.site-footer .brand-name{color:#fff;}
.site-footer .brand-sub{color:rgba(255,255,255,.52);}
.footer-desc{margin-top:16px;font-size:14px;line-height:1.8;color:rgba(255,255,255,.62);max-width:280px;}
.footer-h{font-size:13px;font-weight:600;letter-spacing:.06em;color:rgba(255,255,255,.92);margin-bottom:16px;}
.footer-links{display:flex;flex-direction:column;gap:10px;}
.footer-link{font-size:14px;color:rgba(255,255,255,.72);transition:color .2s var(--ease);width:fit-content;}
.footer-link:hover{color:var(--lime);text-decoration:underline;text-underline-offset:4px;}
.footer-bottom{
  margin-top:48px;border-top:1px solid var(--line-dark);
  padding:20px 0 24px;display:flex;flex-wrap:wrap;gap:10px 24px;justify-content:space-between;
  font-size:12.5px;color:rgba(255,255,255,.52);
}

/* ---------- mobile nav ---------- */
.mobile-tab{
  position:fixed;left:0;right:0;bottom:0;z-index:80;display:none;
  height:56px;padding-bottom:env(safe-area-inset-bottom);
  background:rgba(255,255,255,.97);border-top:1px solid var(--line);
  -webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px);
}
.mobile-tab-inner{display:grid;grid-template-columns:repeat(5,1fr);height:56px;}
.tab-item{
  position:relative;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:2px;
  font-size:11px;color:var(--text-3);transition:color .2s var(--ease);
}
.tab-item svg{width:22px;height:22px;stroke:currentColor;fill:none;stroke-width:1.5;}
.tab-item.is-active{color:var(--lime-fg);}
.tab-item.is-active svg{stroke:var(--sage);}
.tab-item.is-active::before{
  content:"";position:absolute;top:0;left:50%;transform:translateX(-50%);
  width:22px;height:2px;background:var(--lime);border-radius:0 0 2px 2px;
}
.mobile-cta{
  position:fixed;left:0;right:0;z-index:75;display:none;
  align-items:center;justify-content:space-between;gap:12px;
  padding:10px 16px;background:rgba(13,18,16,.95);color:#fff;
}
.mobile-cta span{font-size:13px;color:rgba(255,255,255,.78);}
@media(max-width:767px){
  .mobile-tab{display:block;}
  .mobile-cta{display:flex;bottom:calc(56px + env(safe-area-inset-bottom));}
  body{padding-bottom:calc(126px + env(safe-area-inset-bottom));}
}

/* ---------- reveal ---------- */
.reveal{opacity:0;transform:translateY(12px);transition:opacity .5s var(--ease),transform .5s var(--ease);}
.reveal.is-in{opacity:1;transform:none;}
@media(prefers-reduced-motion:reduce){
  *{transition-duration:.01ms !important;animation-duration:.01ms !important;}
  .reveal{opacity:1;transform:none;}
  .img-card:hover img{transform:none;}
}

/* roulang page: category2 */
*,*::before,*::after{box-sizing:border-box}
:root{
  --ink:#0D1210; --ink2:#16201C; --paper:#F6F6F2; --card:#FFFFFF; --soft:#EFF1EA;
  --acc:#B7F04A; --acc-fg:#14200C; --sage:#4C6B63; --line:#E2E5DE;
  --t1:#12171A; --t2:#5F6A66; --t3:#8B948E;
  --r-card:14px; --r-media:16px; --r-input:10px;
  --sh-1:0 1px 2px rgba(13,18,16,.04);
  --sh-2:0 10px 28px rgba(13,18,16,.09);
  --ease:cubic-bezier(.2,.7,.3,1); --dur:200ms;
}
html{scroll-behavior:smooth}
body{
  margin:0;background:var(--paper);color:var(--t1);
  font-family:"Noto Sans SC","PingFang SC","Microsoft YaHei","Hiragino Sans GB",system-ui,sans-serif;
  font-size:16px;line-height:1.75;
  -webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility;
}
a{color:inherit;text-decoration:none}
img{max-width:100%;display:block}
button,input,textarea,select{font:inherit;color:inherit}
h1,h2,h3,h4,p,figure,ul,ol{margin:0}
ul,ol{padding:0;list-style:none}
:focus-visible{outline:2px solid var(--acc);outline-offset:2px;border-radius:4px}
.num{font-variant-numeric:tabular-nums}

.wrap{width:100%;max-width:1200px;margin:0 auto;padding-left:20px;padding-right:20px}
@media(min-width:768px){.wrap{padding-left:32px;padding-right:32px}}

/* ---------- header ---------- */
.site-header{
  position:sticky;top:0;z-index:60;
  background:rgba(246,246,242,.86);
  -webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);
  border-bottom:1px solid transparent;
  transition:border-color var(--dur) var(--ease),background-color var(--dur) var(--ease);
}
.site-header.is-scrolled{border-bottom-color:var(--line);background:rgba(246,246,242,.95)}
.brand{display:inline-flex;align-items:center;gap:10px}
.brand-mark{
  width:18px;height:18px;display:inline-block;background:var(--acc);flex:none;
  border-radius:4px 10px 4px 4px;box-shadow:inset 0 0 0 1px rgba(20,32,12,.16);
}
.brand-text{display:flex;flex-direction:column;line-height:1}
.brand-name{font-size:16px;font-weight:800;letter-spacing:-.01em}
.brand-sub{font-size:11px;color:var(--t3);margin-top:4px;letter-spacing:.06em}
.nav-link{
  position:relative;font-size:14.5px;font-weight:500;color:var(--t2);
  padding:6px 0;transition:color var(--dur) var(--ease);white-space:nowrap;
}
.nav-link::after{
  content:"";position:absolute;left:0;right:0;bottom:0;height:2px;background:var(--acc);
  transform:scaleX(0);transform-origin:left;transition:transform var(--dur) var(--ease);
}
.nav-link:hover{color:var(--t1)}
.nav-link:hover::after{transform:scaleX(1)}
.nav-link.is-active{color:var(--t1);font-weight:600}
.nav-link.is-active::after{transform:scaleX(1)}

/* ---------- buttons ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  border-radius:999px;font-weight:600;font-size:15px;padding:12px 24px;
  border:1px solid transparent;cursor:pointer;
  transition:background-color var(--dur) var(--ease),border-color var(--dur) var(--ease),
             color var(--dur) var(--ease),transform var(--dur) var(--ease);
}
.btn-primary{background:var(--acc);color:var(--acc-fg)}
.btn-primary:hover{background:#a9e63c}
.btn-primary:active{transform:scale(.98)}
.btn-sm{padding:9px 18px;font-size:14px}
.btn-ghost{background:transparent;border-color:var(--line);color:var(--t1)}
.btn-ghost:hover{border-color:var(--acc);background:var(--soft)}
.btn-outline-light{background:transparent;border-color:rgba(255,255,255,.28);color:#fff}
.btn-outline-light:hover{border-color:var(--acc);color:var(--acc)}
.btn-arrow{transition:transform var(--dur) var(--ease);display:inline-block}
.btn:hover .btn-arrow{transform:translateX(3px)}

.link-more{
  position:relative;display:inline-flex;align-items:center;gap:6px;
  font-size:14px;font-weight:600;color:var(--t1);
}
.link-more::after{
  content:"";position:absolute;left:0;right:0;bottom:-3px;height:2px;background:var(--acc);
  transform:scaleX(0);transform-origin:left;transition:transform var(--dur) var(--ease);
}
.link-more:hover::after{transform:scaleX(1)}
.link-more .btn-arrow{transition:transform var(--dur) var(--ease)}
.link-more:hover .btn-arrow{transform:translateX(3px)}

/* ---------- badges / titles ---------- */
.badge{
  display:inline-flex;align-items:center;border-radius:6px;background:var(--soft);
  color:var(--sage);font-size:12.5px;letter-spacing:.02em;padding:4px 10px;font-weight:500;
}
.badge-dark{background:rgba(255,255,255,.08);color:rgba(255,255,255,.8)}
.sec-title{
  position:relative;padding-left:16px;font-weight:700;line-height:1.3;
  font-size:clamp(1.4rem,2.4vw,2rem);letter-spacing:-.01em;
}
.sec-title::before{
  content:"";position:absolute;left:0;top:.18em;width:3px;height:1.05em;
  background:var(--acc);border-radius:2px;
}
.eyebrow{font-size:12.5px;letter-spacing:.16em;color:var(--t3);text-transform:uppercase}

/* ---------- media ---------- */
.media{
  position:relative;overflow:hidden;border-radius:var(--r-media);background-color:var(--soft);
  background-image:repeating-linear-gradient(45deg,rgba(76,107,99,.12) 0 5px,transparent 5px 11px);
}
.media img{width:100%;height:100%;object-fit:cover;transition:transform var(--dur) var(--ease)}
.media-16x10{aspect-ratio:16/10}
.media-4x3{aspect-ratio:4/3}

/* ---------- compare columns ---------- */
.cmp-item{padding:18px 0;border-top:1px solid var(--line)}
.cmp-item:last-child{border-bottom:1px solid var(--line)}
.cmp-right{border-top:1px solid var(--line);margin-top:36px;padding-top:36px}
@media(min-width:768px){
  .cmp-right{border-top:0;border-left:1px solid var(--line);margin-top:0;padding-top:0;padding-left:48px}
}
.cmp-h{font-size:17px;font-weight:700;margin-bottom:6px}
.cmp-p{font-size:14.5px;line-height:1.8;color:var(--t2)}
.point-dot{width:6px;height:6px;background:var(--acc);border-radius:2px;flex:none;margin-top:11px}

/* ---------- flow ---------- */
.flow-step{display:flex;gap:16px;padding:16px 0;border-top:1px solid var(--line)}
.flow-step:last-child{border-bottom:1px solid var(--line)}
.flow-num{
  flex:none;width:34px;height:34px;border-radius:10px;display:flex;align-items:center;justify-content:center;
  background:var(--soft);color:var(--sage);font-weight:700;font-size:14px;font-variant-numeric:tabular-nums;
}

/* ---------- form ---------- */
.form-card{
  background:#fff;border:1px solid var(--line);border-radius:var(--r-card);
  padding:28px;box-shadow:var(--sh-1);
}
.field{display:block;margin-bottom:18px}
.field-label{display:block;font-size:13px;font-weight:600;margin-bottom:8px;letter-spacing:.01em}
.field input,.field textarea{
  width:100%;background:#fff;border:1px solid var(--line);border-radius:var(--r-input);
  padding:12px 14px;font-size:15px;line-height:1.6;
  transition:border-color var(--dur) var(--ease),box-shadow var(--dur) var(--ease),background-color var(--dur) var(--ease);
}
.field textarea{min-height:118px;resize:vertical}
.field input::placeholder,.field textarea::placeholder{color:var(--t3)}
.field input:focus,.field textarea:focus{
  outline:none;border-color:var(--acc);box-shadow:0 0 0 3px rgba(183,240,74,.28);
}
.form-note{font-size:12.5px;color:var(--t3);line-height:1.7}

/* ---------- faq ---------- */
.faq{border-top:1px solid var(--line)}
.faq details{border-bottom:1px solid var(--line)}
.faq summary{
  list-style:none;cursor:pointer;display:flex;align-items:flex-start;gap:16px;
  padding:20px 16px;position:relative;font-size:16px;font-weight:600;line-height:1.6;
  transition:color var(--dur) var(--ease);
}
.faq summary::-webkit-details-marker{display:none}
.faq summary::before{
  content:"";position:absolute;left:0;top:22px;bottom:22px;width:3px;background:var(--acc);
  border-radius:2px;transform:scaleY(0);transform-origin:top;transition:transform var(--dur) var(--ease);
}
.faq details[open] summary::before{transform:scaleY(1)}
.faq summary:hover{color:var(--sage)}
.faq-q{flex:1}
.faq-ico{flex:none;color:var(--t3);transition:transform var(--dur) var(--ease),color var(--dur) var(--ease);margin-top:2px}
.faq details[open] .faq-ico{transform:rotate(45deg);color:var(--sage)}
.faq-a{padding:0 16px 22px 16px;font-size:14.5px;line-height:1.85;color:var(--t2);max-width:74ch}

/* ---------- footer ---------- */
.site-footer{background:var(--ink);color:rgba(255,255,255,.86);padding:56px 0 22px;margin-top:0}
.site-footer .brand-name{color:#fff}
.site-footer .brand-sub{color:rgba(255,255,255,.55)}
.footer-h{font-size:13px;font-weight:700;letter-spacing:.08em;color:#fff;margin:0 0 16px}
.footer-links{display:flex;flex-direction:column;gap:10px}
.footer-link{
  font-size:14px;color:rgba(255,255,255,.72);width:fit-content;
  transition:color var(--dur) var(--ease);
}
.footer-link:hover{color:var(--acc);text-decoration:underline;text-underline-offset:3px}
.footer-desc{font-size:14px;line-height:1.8;color:rgba(255,255,255,.66);margin:16px 0 0;max-width:34ch}
.footer-bottom{
  margin-top:40px;padding-top:20px;border-top:1px solid rgba(255,255,255,.12);
  display:flex;flex-wrap:wrap;gap:8px 20px;justify-content:space-between;
  font-size:12.5px;color:rgba(255,255,255,.5);
}

/* ---------- mobile tabbar & cta ---------- */
.tabbar{display:none}
.mobile-cta{display:none}
@media(max-width:767px){
  body{padding-bottom:136px}
  .tabbar{
    display:flex;position:fixed;left:0;right:0;bottom:0;z-index:70;
    background:rgba(255,255,255,.97);-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);
    border-top:1px solid var(--line);padding-bottom:env(safe-area-inset-bottom);
  }
  .tab-item{
    flex:1;height:56px;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:3px;
    font-size:12px;color:var(--t3);position:relative;transition:color var(--dur) var(--ease);
  }
  .tab-item svg{width:22px;height:22px;stroke:currentColor;stroke-width:1.5;fill:none;stroke-linecap:round;stroke-linejoin:round}
  .tab-item.is-active{color:var(--sage);font-weight:600}
  .tab-item.is-active::before{
    content:"";position:absolute;top:0;left:50%;transform:translateX(-50%);
    width:22px;height:2px;background:var(--acc);border-radius:2px;
  }
  .mobile-cta{
    display:flex;align-items:center;justify-content:space-between;gap:12px;
    position:fixed;left:0;right:0;bottom:calc(56px + env(safe-area-inset-bottom));z-index:65;
    background:var(--ink);padding:10px 20px;border-top:1px solid rgba(255,255,255,.12);
  }
  .mobile-cta p{margin:0;font-size:12.5px;color:rgba(255,255,255,.72);line-height:1.4}
}

/* ---------- motion ---------- */
.reveal{opacity:0;transform:translateY(12px);transition:opacity .5s var(--ease),transform .5s var(--ease)}
.reveal.is-in{opacity:1;transform:none}
@media (prefers-reduced-motion: reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{animation:none !important;transition:none !important}
  .reveal{opacity:1;transform:none}
}

/* roulang page: category4 */
:root{
  --brand:#B7F04A;
  --brand-ink:#14200C;
  --ink:#0D1210;
  --ink-2:#16201C;
  --paper:#F6F6F2;
  --card:#FFFFFF;
  --soft:#EFF1EA;
  --sub:#4C6B63;
  --body:#12171A;
  --muted:#5F6A66;
  --faint:#8B948E;
  --line:#E2E5DE;
  --line-dark:rgba(255,255,255,.12);
  --r-pill:999px;
  --r-card:14px;
  --r-img:16px;
  --r-input:10px;
  --r-badge:6px;
  --sh-1:0 1px 2px rgba(13,18,16,.04);
  --sh-2:0 10px 28px rgba(13,18,16,.09);
  --ease:cubic-bezier(.2,.7,.3,1);
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  background:var(--paper);
  color:var(--body);
  font-family:"Noto Sans SC","PingFang SC","Microsoft YaHei","Hiragino Sans GB",system-ui,sans-serif;
  font-size:16px;
  line-height:1.75;
  -webkit-font-smoothing:antialiased;
}
img{display:block;max-width:100%;height:auto;}
a{color:inherit;text-decoration:none;}
button,input,textarea{font:inherit;color:inherit;}
button{cursor:pointer;border:0;background:none;}
h1,h2,h3,h4,p{margin:0;}
ul,ol{margin:0;padding:0;list-style:none;}
:focus-visible{outline:2px solid var(--brand);outline-offset:2px;border-radius:4px;}
::selection{background:var(--brand);color:var(--brand-ink);}
body::-webkit-scrollbar{width:10px;}
body::-webkit-scrollbar-thumb{background:#CDD3C9;border-radius:8px;}
body::-webkit-scrollbar-track{background:var(--paper);}

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

/* ============ 通用按钮 ============ */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  border-radius:var(--r-pill);
  font-weight:600;font-size:15px;line-height:1;
  padding:14px 24px;
  transition:background-color .2s var(--ease),border-color .2s var(--ease),transform .2s var(--ease),color .2s var(--ease);
  white-space:nowrap;
}
.btn-sm{padding:10px 18px;font-size:14px;}
.btn-primary{background:var(--brand);color:var(--brand-ink);}
.btn-primary:hover{background:#A9E33B;}
.btn-primary:active{transform:scale(.98);}
.btn-arrow{transition:transform .2s var(--ease);font-size:15px;}
.btn:hover .btn-arrow{transform:translateX(3px);}
.btn-ghost{background:transparent;border:1px solid var(--line);color:var(--body);}
.btn-ghost:hover{border-color:var(--brand);background:var(--soft);}
.btn-dark-ghost{background:transparent;border:1px solid rgba(255,255,255,.28);color:#fff;}
.btn-dark-ghost:hover{border-color:var(--brand);color:var(--brand);}

.link-cta{
  display:inline-flex;align-items:center;gap:6px;
  font-size:14px;font-weight:600;color:var(--body);
  position:relative;transition:color .2s var(--ease);
}
.link-cta::after{
  content:"";position:absolute;left:0;bottom:-3px;height:2px;width:100%;
  background:var(--brand);transform:scaleX(0);transform-origin:left;
  transition:transform .2s var(--ease);
}
.link-cta:hover::after{transform:scaleX(1);}
.link-cta .arw{transition:transform .2s var(--ease);}
.link-cta:hover .arw{transform:translateX(3px);}

.badge{
  display:inline-block;
  border-radius:var(--r-badge);
  background:var(--soft);
  color:var(--sub);
  font-size:12.5px;letter-spacing:.02em;
  padding:4px 10px;
  line-height:1.5;
}
.badge-dark{background:rgba(255,255,255,.08);color:rgba(255,255,255,.8);}

/* ============ 头部 ============ */
.site-header{
  position:sticky;top:0;z-index:50;
  background:rgba(246,246,242,.92);
  backdrop-filter:blur(8px);
  border-bottom:1px solid transparent;
  transition:border-color .2s var(--ease),background-color .2s var(--ease);
}
.site-header.is-scrolled{border-bottom-color:var(--line);background:rgba(246,246,242,.96);}
.brand{display:inline-flex;align-items:center;gap:10px;}
.brand-mark{
  position:relative;width:26px;height:26px;flex:0 0 26px;
  background:var(--ink);border-radius:7px 7px 7px 2px;
}
.brand-mark::after{
  content:"";position:absolute;right:-3px;bottom:-3px;
  width:10px;height:10px;border-radius:2px;background:var(--brand);
}
.brand-text{display:flex;flex-direction:column;line-height:1.15;}
.brand-name{font-size:16px;font-weight:800;letter-spacing:-.01em;color:var(--ink);}
.brand-sub{font-size:11px;color:var(--faint);letter-spacing:.06em;}

.nav-link{
  position:relative;font-size:15px;color:var(--muted);
  padding:6px 0;transition:color .2s var(--ease);
}
.nav-link::after{
  content:"";position:absolute;left:0;right:0;bottom:-2px;height:2px;
  background:var(--brand);transform:scaleX(0);transform-origin:left;
  transition:transform .2s var(--ease);
}
.nav-link:hover{color:var(--ink);}
.nav-link:hover::after{transform:scaleX(1);}
.nav-link.is-active{color:var(--ink);font-weight:600;}
.nav-link.is-active::after{transform:scaleX(1);}

/* ============ Hero ============ */
.page-hero{
  background:var(--soft);
  border-bottom:1px solid var(--line);
  padding:34px 0 44px;
}
@media (min-width:768px){ .page-hero{padding:44px 0 60px;} }
.crumbs{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:12.5px;color:var(--faint);letter-spacing:.02em;}
.crumbs a{color:var(--sub);transition:color .2s var(--ease);}
.crumbs a:hover{color:var(--ink);text-decoration:underline;text-decoration-color:var(--brand);text-underline-offset:3px;}
.crumbs .sep{color:#C3C9BE;}
.crumbs .cur{color:var(--muted);}
h1.hero-title{
  font-size:clamp(1.9rem,4.4vw,3.6rem);
  font-weight:800;line-height:1.14;letter-spacing:-.02em;color:var(--ink);
  margin:18px 0 14px;max-width:24ch;
}
.hero-lead{font-size:16px;color:var(--muted);max-width:52ch;line-height:1.75;}
.hero-tags{display:flex;flex-wrap:wrap;gap:8px;margin-top:20px;}

/* ============ 板块 ============ */
.section{padding:56px 0;}
@media (min-width:768px){ .section{padding:76px 0;} }
@media (min-width:1024px){ .section{padding:96px 0;} }
.sec-head{display:flex;flex-direction:column;gap:12px;margin-bottom:32px;}
.sec-title{
  position:relative;padding-left:16px;
  font-size:clamp(1.4rem,2.4vw,2rem);font-weight:700;line-height:1.3;color:var(--ink);
  letter-spacing:-.01em;
}
.sec-title::before{
  content:"";position:absolute;left:0;top:.28em;width:12px;height:1.05em;
  background:linear-gradient(180deg,var(--brand),rgba(183,240,74,.45));
  border-radius:3px;
}
.sec-desc{font-size:15px;color:var(--muted);max-width:62ch;line-height:1.8;}
.sec-rule{height:1px;background:var(--line);border:0;margin:0;}

/* ============ 卡片矩阵 2×2 ============ */
.matrix{display:grid;grid-template-columns:1fr;gap:20px;}
@media (min-width:768px){ .matrix{grid-template-columns:repeat(2,minmax(0,1fr));gap:24px;} }
.mcard{
  background:var(--card);
  border:1px solid var(--line);
  border-radius:var(--r-card);
  box-shadow:var(--sh-1);
  overflow:hidden;
  display:flex;flex-direction:column;
  transition:transform .2s var(--ease),box-shadow .2s var(--ease),border-color .2s var(--ease);
}
.mcard:hover{transform:translateY(-3px);box-shadow:var(--sh-2);border-color:rgba(183,240,74,.65);}
.media{
  position:relative;aspect-ratio:16/10;overflow:hidden;
  background-color:#E7EAE2;
  background-image:repeating-linear-gradient(45deg,rgba(13,18,16,.06) 0 2px,transparent 2px 9px);
}
.media > img{width:100%;height:100%;object-fit:cover;transition:transform .3s var(--ease);}
.mcard:hover .media > img{transform:scale(1.03);}
.mcard-body{padding:22px;display:flex;flex-direction:column;gap:10px;flex:1;}
.mcard-index{display:flex;align-items:center;gap:10px;}
.num{
  font-size:13px;font-weight:800;letter-spacing:.02em;color:var(--brand-ink);
  background:var(--brand);border-radius:var(--r-badge);
  padding:2px 8px;font-variant-numeric:tabular-nums;
}
.mcard-title{font-size:1.0625rem;font-weight:600;line-height:1.5;color:var(--ink);}
.mcard-text{font-size:14px;line-height:1.75;color:var(--muted);}
.mcard-foot{margin-top:auto;padding-top:14px;border-top:1px solid var(--line);font-size:13px;color:var(--faint);}

/* ============ 排查顺序列表 ============ */
.order-list{border-top:1px solid var(--line);}
.order-item{
  display:grid;grid-template-columns:52px 1fr;gap:16px;
  padding:22px 0;border-bottom:1px solid var(--line);
  transition:background-color .2s var(--ease);
}
@media (min-width:768px){ .order-item{grid-template-columns:88px 1fr;gap:24px;padding:26px 0;} }
.order-item:hover{background:rgba(239,241,234,.6);}
.order-no{
  font-size:22px;font-weight:800;color:var(--brand);letter-spacing:-.02em;
  font-variant-numeric:tabular-nums;line-height:1.2;
}
.order-body h3{font-size:1.0625rem;font-weight:600;color:var(--ink);margin-bottom:6px;}
.order-body p{font-size:14.5px;color:var(--muted);line-height:1.8;max-width:70ch;}

/* ============ 信息块 ============ */
.infoblock{
  background:var(--soft);border:1px solid var(--line);border-radius:var(--r-card);
  padding:26px;
}
@media (min-width:768px){ .infoblock{padding:34px;} }
.info-grid{display:grid;grid-template-columns:1fr;gap:18px;}
@media (min-width:768px){ .info-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:22px 40px;} }
.info-item{display:flex;gap:12px;align-items:flex-start;}
.tick{
  flex:0 0 18px;width:18px;height:18px;margin-top:5px;
  border-radius:5px;background:var(--brand);
  display:flex;align-items:center;justify-content:center;
}
.tick svg{width:11px;height:11px;stroke:var(--brand-ink);}
.info-item h3{font-size:15px;font-weight:600;color:var(--ink);margin-bottom:4px;}
.info-item p{font-size:14px;color:var(--muted);line-height:1.75;}

/* ============ FAQ ============ */
.faq{max-width:760px;margin:0 auto;}
.faq-item{border-top:1px solid var(--line);padding:0 0 0 0;transition:border-color .2s var(--ease);}
.faq-item:last-child{border-bottom:1px solid var(--line);}
.faq-item[open]{border-left:3px solid var(--brand);padding-left:16px;}
.faq summary{
  list-style:none;cursor:pointer;
  display:flex;align-items:center;justify-content:space-between;gap:18px;
  padding:20px 0;
  font-size:16px;font-weight:600;color:var(--ink);line-height:1.5;
}
.faq summary::-webkit-details-marker{display:none;}
.faq-icon{
  flex:0 0 22px;width:22px;height:22px;position:relative;
  transition:transform .2s var(--ease);
}
.faq-icon::before,.faq-icon::after{
  content:"";position:absolute;left:50%;top:50%;background:var(--muted);border-radius:2px;
  transform:translate(-50%,-50%);
}
.faq-icon::before{width:13px;height:1.5px;}
.faq-icon::after{width:1.5px;height:13px;}
.faq-item[open] .faq-icon{transform:rotate(45deg);}
.faq-item[open] .faq-icon::before,.faq-item[open] .faq-icon::after{background:var(--brand-ink);}
.faq-answer{
  font-size:14.5px;line-height:1.8;color:var(--muted);
  padding:0 34px 22px 0;
}

/* ============ CTA 深色区 ============ */
.cta-band{background:var(--ink);color:#fff;padding:64px 0;}
@media (min-width:768px){ .cta-band{padding:88px 0;} }
.cta-inner{max-width:720px;margin:0 auto;text-align:center;display:flex;flex-direction:column;align-items:center;gap:16px;}
.cta-inner h2{font-size:clamp(1.4rem,2.4vw,2rem);font-weight:700;line-height:1.3;letter-spacing:-.01em;}
.cta-inner p{font-size:15px;color:rgba(255,255,255,.7);line-height:1.8;max-width:46ch;}

/* ============ 页脚 ============ */
.site-footer{background:var(--ink);color:rgba(255,255,255,.72);padding:56px 0 0;}
.footer-brand .brand-name{color:#fff;}
.footer-brand .brand-sub{color:rgba(255,255,255,.5);}
.footer-brand .brand-mark{background:#fff;}
.footer-desc{font-size:14px;line-height:1.8;color:rgba(255,255,255,.6);margin-top:14px;max-width:34ch;}
.footer-h{
  font-size:13px;font-weight:600;color:#fff;letter-spacing:.04em;margin-bottom:14px;
  text-transform:none;
}
.footer-links{display:flex;flex-direction:column;gap:10px;}
.footer-link{
  font-size:14px;color:rgba(255,255,255,.72);
  transition:color .2s var(--ease);
  width:fit-content;
}
.footer-link:hover{color:var(--brand);text-decoration:underline;text-underline-offset:3px;}
.footer-bottom{
  margin-top:44px;padding:20px 0 28px;border-top:1px solid var(--line-dark);
  display:flex;flex-wrap:wrap;gap:10px;justify-content:space-between;
  font-size:12.5px;color:rgba(255,255,255,.5);letter-spacing:.02em;
}

/* ============ 移动端底部 Tab ============ */
.mobile-tab{
  position:fixed;left:0;right:0;bottom:0;z-index:60;
  display:flex;
  height:calc(56px + env(safe-area-inset-bottom));
  padding-bottom:env(safe-area-inset-bottom);
  background:rgba(255,255,255,.97);
  border-top:1px solid var(--line);
  backdrop-filter:blur(8px);
}
.mobile-tab a{
  flex:1;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:3px;
  font-size:11.5px;color:var(--muted);position:relative;
  transition:color .2s var(--ease);
}
.mobile-tab a svg{width:22px;height:22px;stroke:currentColor;fill:none;stroke-width:1.5;}
.mobile-tab a.is-active{color:var(--brand-ink);font-weight:600;}
.mobile-tab a.is-active::before{
  content:"";position:absolute;top:0;left:50%;transform:translateX(-50%);
  width:26px;height:2px;background:var(--brand);border-radius:0 0 3px 3px;
}
.mobile-tab a.is-active svg{stroke:var(--brand-ink);}
.mobile-tab a.is-active svg path[data-fill]{fill:var(--brand);}
.mobile-tab a:active{background:var(--soft);}

/* ============ 移动端固定转化条 ============ */
.mobile-cta{
  position:fixed;left:0;right:0;z-index:55;
  bottom:calc(56px + env(safe-area-inset-bottom));
  display:flex;align-items:center;justify-content:space-between;gap:12px;
  padding:10px 16px;
  background:rgba(13,18,16,.96);
  border-top:1px solid var(--line-dark);
}
.mobile-cta span{font-size:12.5px;color:rgba(255,255,255,.78);line-height:1.4;}
.mobile-cta .btn{padding:10px 18px;font-size:13.5px;}
@media (min-width:768px){
  .mobile-tab,.mobile-cta{display:none;}
}

/* 移动端为底部固定元素留白 */
@media (max-width:767px){
  body{padding-bottom:calc(56px + 66px + env(safe-area-inset-bottom));}
}

/* ============ 入场动效 ============ */
.reveal{opacity:0;transform:translateY(12px);transition:opacity .5s var(--ease),transform .5s var(--ease);}
.reveal.is-in{opacity:1;transform:none;}
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{animation:none !important;transition:none !important;}
  .reveal{opacity:1;transform:none;}
  html{scroll-behavior:auto;}
}

/* roulang page: category5 */
:root{
    --accent:#B7F04A;
    --accent-fg:#14200C;
    --ink:#0D1210;
    --ink-2:#16201C;
    --paper:#F6F6F2;
    --card:#FFFFFF;
    --block:#EFF1EA;
    --sage:#4C6B63;
    --text:#12171A;
    --text-2:#5F6A66;
    --text-3:#8B948E;
    --line:#E2E5DE;
    --line-dark:rgba(255,255,255,.12);
    --r-pill:999px;
    --r-card:14px;
    --r-img:16px;
    --r-input:10px;
    --r-badge:6px;
    --sh-1:0 1px 2px rgba(13,18,16,.04);
    --sh-2:0 10px 28px rgba(13,18,16,.09);
    --ease:cubic-bezier(.2,.7,.3,1);
  }

  *,*::before,*::after{box-sizing:border-box;}
  html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
  body{
    margin:0;
    background:var(--paper);
    color:var(--text);
    font-family:"Noto Sans SC","PingFang SC","Microsoft YaHei","Hiragino Sans GB",system-ui,sans-serif;
    font-size:16px;
    line-height:1.75;
    font-variant-numeric:tabular-nums;
    -webkit-font-smoothing:antialiased;
  }
  img{max-width:100%;display:block;}
  a{color:inherit;text-decoration:none;}
  button,input,textarea{font:inherit;color:inherit;}
  h1,h2,h3,h4,p{margin:0;}
  ul{margin:0;padding:0;list-style:none;}

  .wrap{width:100%;max-width:1200px;margin:0 auto;padding-left:20px;padding-right:20px;}
  @media (min-width:768px){ .wrap{padding-left:32px;padding-right:32px;} }

  a:focus-visible,button:focus-visible,summary:focus-visible,input:focus-visible,textarea:focus-visible{
    outline:2px solid var(--accent);
    outline-offset:2px;
    border-radius:4px;
  }

  /* ---------- Header ---------- */
  .site-header{
    position:sticky;top:0;z-index:60;
    background:rgba(246,246,242,.92);
    backdrop-filter:saturate(140%) blur(6px);
    transition:border-color 200ms var(--ease),background-color 200ms var(--ease);
    border-bottom:1px solid transparent;
  }
  .site-header.is-scrolled{border-bottom-color:var(--line);}
  .brand{display:inline-flex;align-items:center;gap:10px;}
  .brand-mark{
    width:22px;height:22px;display:inline-block;flex:none;
    background:var(--ink);
    border-radius:6px 3px 6px 3px;
    position:relative;
  }
  .brand-mark::after{
    content:"";position:absolute;right:-4px;bottom:-4px;width:11px;height:11px;
    background:var(--accent);border-radius:2px;
  }
  .brand-text{display:flex;flex-direction:column;line-height:1.1;}
  .brand-name{font-size:17px;font-weight:800;letter-spacing:-.02em;}
  .brand-sub{font-size:11px;color:var(--text-3);letter-spacing:.06em;}

  .nav-link{
    position:relative;font-size:14.5px;font-weight:500;color:var(--text-2);
    padding:6px 2px;transition:color 200ms var(--ease);
  }
  .nav-link::after{
    content:"";position:absolute;left:0;right:0;bottom:0;height:2px;
    background:var(--accent);transform:scaleX(0);transform-origin:left;
    transition:transform 200ms var(--ease);
  }
  .nav-link:hover{color:var(--text);}
  .nav-link:hover::after{transform:scaleX(1);}
  .nav-link.is-active{color:var(--text);font-weight:700;}
  .nav-link.is-active::after{transform:scaleX(1);}

  /* ---------- Buttons ---------- */
  .btn{
    display:inline-flex;align-items:center;justify-content:center;gap:8px;
    border-radius:var(--r-pill);border:1px solid transparent;
    font-weight:600;letter-spacing:.01em;cursor:pointer;
    transition:background-color 200ms var(--ease),border-color 200ms var(--ease),
               transform 200ms var(--ease),color 200ms var(--ease),box-shadow 200ms var(--ease);
    white-space:nowrap;
  }
  .btn-primary{background:var(--accent);color:var(--accent-fg);padding:12px 24px;font-size:15px;}
  .btn-primary:hover{background:#a9e63c;box-shadow:var(--sh-2);}
  .btn-primary:active{transform:scale(.98);}
  .btn-primary .btn-arrow{transition:transform 200ms var(--ease);}
  .btn-primary:hover .btn-arrow{transform:translateX(3px);}
  .btn-sm{padding:9px 18px;font-size:14px;}
  .btn-ghost{
    background:transparent;border-color:var(--line);color:var(--text);
    padding:12px 24px;font-size:15px;
  }
  .btn-ghost:hover{border-color:var(--accent);background:var(--block);}
  .btn-ghost-dark{
    background:transparent;border-color:rgba(255,255,255,.28);color:#fff;
    padding:12px 24px;font-size:15px;
  }
  .btn-ghost-dark:hover{border-color:var(--accent);color:var(--accent);}
  .btn-block{width:100%;}

  .link-cta{
    display:inline-flex;align-items:center;gap:6px;
    font-size:14px;font-weight:600;color:var(--text);
    position:relative;padding-bottom:2px;
  }
  .link-cta::after{
    content:"";position:absolute;left:0;right:0;bottom:0;height:2px;background:var(--accent);
    transform:scaleX(0);transform-origin:left;transition:transform 200ms var(--ease);
  }
  .link-cta:hover::after{transform:scaleX(1);}
  .link-cta .arw{transition:transform 200ms var(--ease);}
  .link-cta:hover .arw{transform:translateX(3px);}

  /* ---------- Section heading ---------- */
  .sec-title{
    display:flex;align-items:flex-start;gap:10px;
    font-size:clamp(1.4rem,2.4vw,2rem);font-weight:700;line-height:1.3;letter-spacing:-.01em;
  }
  .sec-title::before{
    content:"";flex:none;width:12px;height:3px;border-radius:2px;background:var(--accent);
    margin-top:.7em;
  }
  .sec-sub{color:var(--text-2);font-size:15px;max-width:640px;margin-top:12px;}

  .eyebrow{
    display:inline-flex;align-items:center;gap:8px;
    font-size:12.5px;letter-spacing:.06em;color:var(--sage);font-weight:600;
  }
  .eyebrow::before{content:"";width:18px;height:1px;background:var(--accent);}

  /* ---------- Hero ---------- */
  .cat-hero{background:var(--card);border-bottom:1px solid var(--line);}
  .cat-hero-inner{padding-top:26px;padding-bottom:34px;}
  .breadcrumb{font-size:12.5px;color:var(--text-3);display:flex;flex-wrap:wrap;gap:8px;align-items:center;}
  .breadcrumb a{color:var(--text-2);transition:color 200ms var(--ease);}
  .breadcrumb a:hover{color:var(--text);text-decoration:underline;text-decoration-color:var(--accent);text-underline-offset:4px;}
  .breadcrumb .sep{color:#c6cdc7;}
  .breadcrumb .cur{color:var(--text);}
  h1.page-h1{
    font-size:clamp(1.9rem,4.4vw,3.2rem);
    font-weight:800;line-height:1.14;letter-spacing:-.02em;
    margin-top:20px;max-width:20em;
  }
  .hero-lead{margin-top:16px;font-size:16px;color:var(--text-2);max-width:44em;}
  .hero-actions{margin-top:26px;display:flex;flex-wrap:wrap;gap:14px;align-items:center;}
  .hero-tags{margin-top:22px;display:flex;flex-wrap:wrap;gap:8px;}

  .badge{
    display:inline-block;background:var(--block);color:var(--sage);
    font-size:12.5px;letter-spacing:.02em;border-radius:var(--r-badge);
    padding:5px 10px;line-height:1.5;
  }
  .badge-dark{background:rgba(255,255,255,.08);color:rgba(255,255,255,.8);}

  /* ---------- Media ---------- */
  .img-frame{
    position:relative;border-radius:var(--r-img);overflow:hidden;
    background-color:var(--block);
    background-image:repeating-linear-gradient(45deg,rgba(76,107,99,.10) 0 6px,transparent 6px 12px);
  }
  .img-frame img{width:100%;height:100%;object-fit:cover;display:block;transition:transform 300ms var(--ease);}
  .ratio-16x10{aspect-ratio:16/10;}
  .ratio-16x9{aspect-ratio:16/9;}

  /* ---------- Content blocks ---------- */
  .section{padding-top:56px;padding-bottom:56px;}
  @media (min-width:768px){ .section{padding-top:80px;padding-bottom:80px;} }
  @media (min-width:1024px){ .section{padding-top:100px;padding-bottom:100px;} }

  .prose-cn p{font-size:16px;line-height:1.85;color:var(--text-2);margin-top:16px;max-width:38em;}
  .prose-cn p strong{color:var(--text);font-weight:600;}

  .check-list{margin-top:22px;display:grid;gap:12px;}
  .check-list li{display:flex;gap:10px;align-items:flex-start;font-size:15px;color:var(--text-2);}
  .check-list li span.tick{
    flex:none;width:18px;height:18px;margin-top:4px;border-radius:50%;
    background:rgba(183,240,74,.28);color:var(--accent-fg);
    display:inline-flex;align-items:center;justify-content:center;
  }
  .check-list li span.tick svg{width:11px;height:11px;}

  .panel{background:var(--card);border:1px solid var(--line);border-radius:var(--r-card);box-shadow:var(--sh-1);}
  .panel-pad{padding:24px;}
  @media (min-width:768px){ .panel-pad{padding:32px;} }

  .divider-list{border-top:1px solid var(--line);}
  .divider-list li{
    border-bottom:1px solid var(--line);padding:18px 0;
    display:flex;gap:16px;align-items:flex-start;
  }
  .divider-list .num{
    flex:none;font-size:13px;font-weight:700;color:var(--sage);
    letter-spacing:.04em;padding-top:2px;min-width:26px;
  }
  .divider-list h4{font-size:16px;font-weight:600;line-height:1.5;}
  .divider-list p{font-size:14.5px;color:var(--text-2);line-height:1.8;margin-top:4px;}

  /* ---------- Stat band ---------- */
  .stat-band{
    position:relative;background-color:var(--ink);color:#fff;overflow:hidden;
  }
  .stat-band .bg{
    position:absolute;inset:0;
    background-image:url('/assets/images/backpic/back-3.png');
    background-size:cover;background-position:center;
    opacity:.28;
  }
  .stat-band .overlay{position:absolute;inset:0;background:rgba(13,18,16,.72);}
  .stat-band .inner{position:relative;padding-top:48px;padding-bottom:48px;}
  @media (min-width:768px){ .stat-band .inner{padding-top:64px;padding-bottom:64px;} }
  .stat-grid{display:grid;gap:26px;grid-template-columns:repeat(2,minmax(0,1fr));}
  @media (min-width:900px){ .stat-grid{grid-template-columns:repeat(4,minmax(0,1fr));gap:32px;} }
  .stat-item .k{
    font-size:clamp(1.5rem,2.6vw,2rem);font-weight:800;color:var(--accent);line-height:1.2;letter-spacing:-.02em;
  }
  .stat-item .v{margin-top:8px;font-size:12.5px;letter-spacing:.02em;color:rgba(255,255,255,.68);line-height:1.7;}
  .stat-item{border-top:1px solid var(--line-dark);padding-top:16px;}

  /* ---------- FAQ ---------- */
  .faq-list{border-bottom:1px solid var(--line);margin-top:32px;}
  .faq-item{border-top:1px solid var(--line);}
  .faq-item summary{
    position:relative;list-style:none;cursor:pointer;padding:20px 44px 20px 18px;
    font-size:16px;font-weight:600;line-height:1.6;color:var(--text);
    transition:color 200ms var(--ease);
  }
  .faq-item summary::-webkit-details-marker{display:none;}
  .faq-item summary::before{
    content:"";position:absolute;left:0;top:18px;bottom:18px;width:3px;border-radius:2px;
    background:var(--accent);opacity:0;transition:opacity 200ms var(--ease);
  }
  .faq-item summary::after{
    content:"+";position:absolute;right:8px;top:50%;transform:translateY(-50%);
    font-size:20px;font-weight:400;color:var(--sage);line-height:1;
    transition:transform 200ms var(--ease),color 200ms var(--ease);
  }
  .faq-item[open] summary::before{opacity:1;}
  .faq-item[open] summary::after{transform:translateY(-50%) rotate(45deg);color:var(--accent-fg);}
  .faq-item summary:hover{color:var(--sage);}
  .faq-body{padding:0 44px 22px 18px;font-size:14.5px;line-height:1.85;color:var(--text-2);}
  .faq-body p+p{margin-top:10px;}

  /* ---------- Form ---------- */
  .form-grid{display:grid;gap:18px;}
  @media (min-width:768px){ .form-grid{grid-template-columns:1fr 1fr;} .form-grid .full{grid-column:1/-1;} }
  .field label{display:block;font-size:13px;font-weight:600;margin-bottom:8px;color:var(--text);}
  .field input,.field textarea{
    width:100%;background:#fff;border:1px solid var(--line);border-radius:var(--r-input);
    padding:12px 14px;font-size:15px;transition:border-color 200ms var(--ease),box-shadow 200ms var(--ease);
  }
  .field textarea{min-height:130px;resize:vertical;line-height:1.8;}
  .field input::placeholder,.field textarea::placeholder{color:var(--text-3);}
  .field input:focus,.field textarea:focus{
    outline:none;border-color:var(--accent);box-shadow:0 0 0 3px rgba(183,240,74,.28);
  }
  .form-note{margin-top:14px;font-size:12.5px;color:var(--text-3);}
  .form-alert{
    display:none;margin-top:16px;padding:12px 14px;border-radius:var(--r-input);
    background:rgba(183,240,74,.22);color:#25400f;font-size:14px;font-weight:500;
  }
  .form-alert.is-on{display:block;}

  /* ---------- CTA ---------- */
  .cta-band{background:var(--ink);color:#fff;}
  .cta-inner{padding-top:64px;padding-bottom:64px;text-align:center;}
  @media (min-width:768px){ .cta-inner{padding-top:88px;padding-bottom:88px;} }
  .cta-inner h2{
    font-size:clamp(1.5rem,2.6vw,2.1rem);font-weight:800;line-height:1.3;letter-spacing:-.01em;
  }
  .cta-inner p{margin-top:14px;font-size:15px;color:rgba(255,255,255,.7);max-width:36em;margin-left:auto;margin-right:auto;}
  .cta-actions{margin-top:28px;display:flex;justify-content:center;}

  /* ---------- Sub links ---------- */
  .sub-links{display:grid;gap:0;}
  .sub-links a{
    display:flex;align-items:center;justify-content:space-between;gap:16px;
    padding:18px 4px;border-bottom:1px solid var(--line);
    font-size:15px;font-weight:600;color:var(--text);
    transition:color 200ms var(--ease),padding-left 200ms var(--ease);
  }
  .sub-links a .meta{font-size:13px;font-weight:400;color:var(--text-3);}
  .sub-links a:hover{color:var(--sage);padding-left:10px;}
  .sub-links a:hover .arw{transform:translateX(3px);}
  .sub-links .arw{transition:transform 200ms var(--ease);color:var(--sage);}
  .sub-links a[aria-current="page"]{color:var(--text-3);pointer-events:none;}

  /* ---------- Footer ---------- */
  .site-footer{background:var(--ink);color:#fff;}
  .site-footer .wrap{padding-top:56px;padding-bottom:28px;}
  .footer-brand .brand-name,.footer-brand .brand-sub{color:#fff;}
  .footer-brand .brand-sub{color:rgba(255,255,255,.55);}
  .footer-brand .brand-mark{background:#fff;}
  .footer-brand .brand-mark::after{background:var(--accent);}
  .footer-desc{margin-top:16px;font-size:14px;line-height:1.8;color:rgba(255,255,255,.66);max-width:26em;}
  .footer-h{font-size:13px;font-weight:700;letter-spacing:.06em;color:rgba(255,255,255,.9);margin-bottom:14px;}
  .footer-links{display:flex;flex-direction:column;gap:10px;}
  .footer-link{
    font-size:14px;color:rgba(255,255,255,.72);transition:color 200ms var(--ease);
  }
  .footer-link:hover{color:var(--accent);text-decoration:underline;text-underline-offset:4px;}
  .footer-bottom{
    margin-top:44px;padding-top:20px;border-top:1px solid var(--line-dark);
    display:flex;flex-wrap:wrap;gap:10px 20px;justify-content:space-between;
    font-size:12.5px;color:rgba(255,255,255,.55);
  }

  /* ---------- Mobile tab bar & cta bar ---------- */
  .mobile-tab{
    display:flex;position:fixed;left:0;right:0;bottom:0;z-index:70;
    background:rgba(255,255,255,.97);
    border-top:1px solid var(--line);
    padding-bottom:env(safe-area-inset-bottom);
    backdrop-filter:blur(6px);
  }
  .mobile-tab a{
    flex:1;height:56px;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:3px;
    font-size:12px;color:var(--text-3);position:relative;
    transition:color 200ms var(--ease);
  }
  .mobile-tab a svg{width:22px;height:22px;stroke-width:1.5;}
  .mobile-tab a.is-active{color:var(--sage);}
  .mobile-tab a.is-active svg{stroke:var(--accent);fill:none;}
  .mobile-tab a.is-active::before{
    content:"";position:absolute;top:0;left:50%;transform:translateX(-50%);
    width:22px;height:2px;border-radius:2px;background:var(--accent);
  }
  .mobile-cta{
    position:fixed;left:0;right:0;z-index:69;
    bottom:calc(56px + env(safe-area-inset-bottom));
    background:rgba(13,18,16,.96);
    padding:10px 16px;
    display:flex;align-items:center;justify-content:space-between;gap:12px;
  }
  .mobile-cta span{font-size:12.5px;color:rgba(255,255,255,.75);line-height:1.5;}

  @media (max-width:767px){
    body{padding-bottom:calc(56px + 62px + env(safe-area-inset-bottom));}
  }
  @media (min-width:768px){
    .mobile-tab,.mobile-cta{display:none;}
  }
  @media (max-width:767px){
    .mobile-tab,.mobile-cta{display:flex;}
  }

  /* ---------- Reveal animation ---------- */
  .reveal{opacity:0;transform:translateY(12px);transition:opacity 420ms var(--ease),transform 420ms var(--ease);}
  .reveal.is-in{opacity:1;transform:none;}
  @media (prefers-reduced-motion:reduce){
    .reveal{opacity:1;transform:none;transition:none;}
    *{animation-duration:.001ms !important;transition-duration:.001ms !important;}
    html{scroll-behavior:auto;}
  }