/* roulang page: index */
:root{
  --bg:#F4F4F0; --surface:#FFFFFF; --surface-2:#EDEEE8;
  --ink:#0E1013; --ink-2:#2B3036; --muted:#6C7278; --line:#E2E3DC;
  --accent:#FF5A1E; --accent-strong:#E8470D; --accent-soft:#FFF1EA;
  --signal:#0FB5A5; --dark:#101418;
  --radius-card:16px; --radius-img:12px; --radius-btn:10px;
  --shadow-1:0 1px 2px rgba(14,16,19,.04);
  --shadow-2:0 16px 36px -18px rgba(14,16,19,.28);
  --font-cn:"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",sans-serif;
  --font-mono:ui-monospace,"JetBrains Mono",Consolas,"Courier New",monospace;
  --space-section:clamp(56px,7vw,108px);
  --container:1200px;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;background:var(--bg);color:var(--ink);
  font-family:var(--font-cn);font-size:16px;line-height:1.75;
  font-variant-numeric:tabular-nums;
}
img{max-width:100%;display:block;height:auto}
a{color:inherit;text-decoration:none}
ul,ol{margin:0;padding:0;list-style:none}
h1,h2,h3,h4,p{margin:0}
button,input,select,textarea{font:inherit;color:inherit}
:focus-visible{outline:2px solid var(--accent);outline-offset:2px;border-radius:4px}
.mono{font-family:var(--font-mono);font-variant-numeric:tabular-nums}
.container{width:100%;max-width:var(--container);margin:0 auto;padding:0 24px}
@media (min-width:1024px) and (max-width:1279px){:root{--container:1080px}}
@media (max-width:767px){.container{padding:0 16px}}

/* ---------- 通用元素 ---------- */
.badge{display:inline-flex;align-items:center;gap:6px;height:26px;padding:0 12px;border-radius:999px;background:var(--accent-soft);color:var(--accent-strong);font-size:12px;font-weight:700;letter-spacing:.06em}
.tag{display:inline-flex;align-items:center;height:26px;padding:0 10px;border-radius:6px;background:var(--surface-2);color:var(--ink-2);font-family:var(--font-mono);font-size:12px}
.eyebrow{font-size:12px;font-weight:700;letter-spacing:.18em;color:var(--muted);text-transform:uppercase}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;border-radius:var(--radius-btn);border:1px solid transparent;font-weight:700;cursor:pointer;transition:transform .18s cubic-bezier(.2,.7,.2,1),background-color .18s,border-color .18s,color .18s,box-shadow .18s;white-space:nowrap}
.btn-sm{height:32px;padding:0 14px;font-size:13px}
.btn-md{height:40px;padding:0 18px;font-size:14px}
.btn-lg{height:52px;padding:0 28px;font-size:16px}
.btn-primary{background:var(--accent);color:#fff}
.btn-primary:hover{background:var(--accent-strong);transform:translateY(-1px)}
.btn-primary:active{transform:translateY(1px)}
.btn-outline{border-color:var(--ink);color:var(--ink);background:transparent}
.btn-outline:hover{background:var(--ink);color:#fff;transform:translateY(-1px)}
.btn-outline:active{transform:translateY(1px)}
.btn-light{border-color:rgba(255,255,255,.5);color:#fff;background:transparent}
.btn-light:hover{background:rgba(255,255,255,.12);transform:translateY(-1px)}
.btn-ghost{color:var(--ink);background:transparent;padding:0 4px}
.btn-ghost svg{transition:transform .18s}
.btn-ghost:hover svg{transform:translateX(8px)}
.btn[disabled],.btn.is-disabled{opacity:.4;pointer-events:none}
.text-link{position:relative;color:var(--ink-2);font-weight:600;display:inline-flex;align-items:center;gap:6px}
.text-link::after{content:"";position:absolute;left:0;bottom:-2px;height:1px;width:0;background:var(--accent);transition:width .22s ease}
.text-link:hover::after{width:100%}
.card{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius-card);box-shadow:var(--shadow-1);transition:transform .18s cubic-bezier(.2,.7,.2,1),border-color .18s,box-shadow .18s}
.card:hover{transform:translateY(-4px);border-color:var(--accent);box-shadow:var(--shadow-2)}
.section{padding:var(--space-section) 0}
.section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;margin-bottom:24px}
.section-head h2{font-size:clamp(1.5rem,2.4vw,2.25rem);font-weight:800;letter-spacing:-.02em;line-height:1.2;display:flex;align-items:center;gap:12px}
.section-head h2::before{content:"";width:4px;height:1.05em;background:var(--accent);border-radius:2px;flex:none}
.section-head p{margin-top:10px;color:var(--muted);font-size:15px;max-width:640px}
.ruler{height:10px;background:repeating-linear-gradient(90deg,var(--line) 0 1px,transparent 1px 16px);opacity:.9;border-radius:2px}

/* ---------- 导航 ---------- */
.site-header{position:sticky;top:0;z-index:80;background:rgba(255,255,255,.78);backdrop-filter:blur(14px) saturate(140%);-webkit-backdrop-filter:blur(14px) saturate(140%);border-bottom:1px solid var(--line)}
.header-inner{display:flex;align-items:center;gap:28px;height:64px}
.logo{display:flex;align-items:center;gap:10px;flex:none}
.logo-mark{width:34px;height:34px;border-radius:10px;background:var(--ink);color:var(--accent);display:grid;place-items:center;flex:none}
.logo-text{font-weight:800;font-size:16px;letter-spacing:-.01em}
.logo-text em{font-style:normal;color:var(--muted);font-weight:600}
.main-nav{display:flex;align-items:center;gap:26px;flex:1;min-width:0}
.nav-link{position:relative;padding:20px 0;font-size:14px;font-weight:600;color:var(--ink-2);white-space:nowrap}
.nav-link::after{content:"";position:absolute;left:0;right:0;bottom:14px;height:2px;background:var(--accent);transform:scaleX(0);transform-origin:left;transition:transform .2s ease}
.nav-link:hover{color:var(--ink)}
.nav-link:hover::after,.nav-link.is-active::after{transform:scaleX(1)}
.nav-link.is-active{color:var(--ink);font-weight:700}
.header-tools{display:flex;align-items:center;gap:14px;flex:none}
.command-search{position:relative;display:flex;align-items:center;width:240px;height:40px;border:1px solid var(--line);border-radius:var(--radius-btn);background:var(--surface);transition:width .24s ease,border-color .18s,box-shadow .18s}
.command-search:focus-within{width:320px;border-color:var(--accent);box-shadow:0 0 0 3px rgba(255,90,30,.18)}
.command-search svg{position:absolute;left:11px;color:var(--muted);pointer-events:none}
.command-search input{width:100%;height:100%;border:0;background:transparent;padding:0 46px 0 36px;font-size:13px;outline:none}
.command-search input::placeholder{color:var(--muted)}
.command-search kbd{position:absolute;right:8px;font-family:var(--font-mono);font-size:11px;color:var(--muted);border:1px solid var(--line);border-radius:6px;padding:1px 6px;background:var(--surface-2)}
.nav-toggle{display:none;width:44px;height:44px;align-items:center;justify-content:center;border:1px solid var(--line);border-radius:var(--radius-btn);background:var(--surface);cursor:pointer}
.nav-mobile-extra{display:none}
.nav-scrim{display:none}

@media (max-width:1023px){
  .command-search{width:190px}
  .command-search:focus-within{width:230px}
  .logo-text em{display:none}
}
@media (max-width:767px){
  .header-inner{gap:12px;height:60px}
  .header-tools .command-search,
  .header-tools .ghost-link,
  .header-tools .btn-primary{display:none}
  .nav-toggle{display:inline-flex}
  .main-nav{position:fixed;top:0;right:0;width:min(320px,86vw);height:100%;background:var(--surface);border-left:1px solid var(--line);flex-direction:column;align-items:stretch;gap:0;padding:78px 20px 28px;transform:translateX(102%);transition:transform .28s cubic-bezier(.2,.7,.2,1);z-index:90;overflow-y:auto}
  .main-nav.is-open{transform:translateX(0)}
  .nav-link{padding:14px 0;border-bottom:1px solid var(--line);font-size:15px}
  .nav-link::after{bottom:8px}
  .nav-mobile-extra{display:block;margin-top:22px}
  .nav-mobile-extra .command-search{width:100%;margin-bottom:14px}
  .nav-mobile-extra .command-search:focus-within{width:100%}
  .nav-mobile-extra .btn{width:100%;height:48px}
  .nav-scrim{display:none;position:fixed;inset:0;background:rgba(14,16,19,.42);z-index:85}
  .nav-scrim.is-open{display:block}
}

/* ---------- Hero ---------- */
.hero{position:relative;overflow:hidden;padding:clamp(40px,6vw,84px) 0 clamp(44px,6vw,84px)}
.hero-bg{position:absolute;inset:0;background:url('/assets/images/backpic/back-1.webp') center/cover no-repeat;opacity:.16}
.hero::after{content:"";position:absolute;inset:0;background:linear-gradient(180deg,rgba(244,244,240,.72),rgba(244,244,240,.96))}
.hero-grid{position:relative;z-index:2;display:grid;grid-template-columns:7fr 5fr;gap:48px;align-items:center}
.hero h1{font-size:clamp(2.25rem,4.6vw,3.75rem);font-weight:800;letter-spacing:-.03em;line-height:1.08;margin-bottom:16px}
.hero h1 span{color:var(--accent)}
.hero-sub{font-size:clamp(1rem,1.3vw,1.125rem);color:var(--ink-2);max-width:560px;margin-bottom:22px}
.hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin-bottom:26px}
.trust-bar{display:grid;grid-template-columns:repeat(4,1fr);gap:16px;border-top:1px solid var(--line);padding-top:18px;max-width:620px}
.trust-item dt{font-size:12px;color:var(--muted);letter-spacing:.08em}
.trust-item dd{margin:2px 0 0;font-family:var(--font-mono);font-size:14px;font-weight:700}
.hero-visual{position:relative}
.hero-visual .visual-frame{position:relative;border:1px solid var(--line);border-radius:20px;overflow:hidden;background:var(--surface);box-shadow:var(--shadow-2)}
.hero-visual .visual-frame img{width:100%;aspect-ratio:16/10;object-fit:cover}
.hero-visual .visual-panel{position:absolute;left:-18px;bottom:-22px;width:min(250px,72%);background:var(--surface);border:1px solid var(--line);border-radius:var(--radius-card);padding:16px;box-shadow:var(--shadow-2)}
.hero-visual .visual-panel .row{display:flex;align-items:center;justify-content:space-between;gap:10px;font-size:13px;color:var(--muted)}
.hero-visual .visual-panel .row b{font-family:var(--font-mono);color:var(--ink);font-size:15px}
.hero-visual .visual-panel .dot{width:8px;height:8px;border-radius:50%;background:var(--signal);display:inline-block;margin-right:6px}
.hero-ruler{margin-top:30px}
@media (max-width:1023px){
  .hero-grid{grid-template-columns:1fr;gap:36px}
  .hero-visual .visual-panel{position:static;width:100%;margin-top:16px}
}
@media (max-width:767px){
  .trust-bar{grid-template-columns:repeat(2,1fr);gap:14px}
  .hero-actions .btn{flex:1 1 auto}
}

/* ---------- 价值点 ---------- */
.value-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:20px}
.value-item{display:flex;gap:18px;padding:28px;background:var(--surface);border:1px solid var(--line);border-radius:var(--radius-card);transition:transform .18s cubic-bezier(.2,.7,.2,1),border-color .18s,box-shadow .18s}
.value-item:hover{transform:translateY(-4px);border-color:var(--accent);box-shadow:var(--shadow-2)}
.value-item:nth-child(2){margin-top:26px}
.value-item:nth-child(4){margin-top:26px}
.value-num{font-family:var(--font-mono);font-size:30px;font-weight:700;color:var(--line);line-height:1;flex:none}
.value-icon{width:40px;height:40px;border-radius:10px;background:var(--accent-soft);color:var(--accent-strong);display:grid;place-items:center;margin-bottom:12px}
.value-item h3{font-size:1.125rem;font-weight:700;margin-bottom:8px}
.value-item p{color:var(--muted);font-size:15px}
@media (max-width:767px){
  .value-grid{grid-template-columns:1fr}
  .value-item:nth-child(2),.value-item:nth-child(4){margin-top:0}
  .value-item{padding:22px}
}

/* ---------- 功能轮播 ---------- */
.shots{background:var(--surface-2);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.shot-tabs{display:flex;flex-wrap:wrap;gap:8px;margin-bottom:26px}
.shot-tab{height:38px;padding:0 16px;border-radius:999px;border:1px solid var(--line);background:var(--surface);font-size:14px;font-weight:600;color:var(--ink-2);cursor:pointer;transition:background-color .18s,color .18s,border-color .18s}
.shot-tab:hover{border-color:var(--ink)}
.shot-tab.is-active{background:var(--ink);border-color:var(--ink);color:#fff}
.shot-panel{display:none;grid-template-columns:6fr 6fr;gap:36px;align-items:center}
.shot-panel.is-active{display:grid}
.shot-panel .shot-img{border:1px solid var(--line);border-radius:20px;overflow:hidden;background:var(--surface)}
.shot-panel .shot-img img{width:100%;aspect-ratio:16/10;object-fit:cover}
.shot-panel h3{font-size:1.375rem;font-weight:800;margin-bottom:10px;letter-spacing:-.01em}
.shot-panel p{color:var(--ink-2);margin-bottom:16px}
.shot-tags{display:flex;flex-wrap:wrap;gap:8px}
.shot-dots{display:flex;gap:8px;margin-top:26px}
.shot-dot{width:10px;height:10px;border-radius:50%;border:1px solid var(--line);background:var(--surface);cursor:pointer;padding:0}
.shot-dot.is-active{background:var(--accent);border-color:var(--accent)}
@media (max-width:1023px){.shot-panel.is-active{grid-template-columns:1fr;gap:22px}}
@media (max-width:767px){
  .shot-tab{height:34px;padding:0 12px;font-size:13px}
}

/* ---------- 系统要求 ---------- */
.spec-grid{display:grid;grid-template-columns:1fr 1fr;gap:28px}
.spec-col{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius-card);padding:26px}
.spec-col h3{font-size:1.125rem;font-weight:800;display:flex;align-items:center;gap:10px;margin-bottom:8px}
.spec-col .meta{font-family:var(--font-mono);font-size:12px;color:var(--muted);margin-bottom:14px}
.spec-table{width:100%;border-collapse:collapse}
.spec-table tr{border-bottom:1px solid var(--line)}
.spec-table tr:last-child{border-bottom:0}
.spec-table th{text-align:left;font-weight:500;color:var(--muted);font-size:14px;padding:12px 0;width:40%}
.spec-table td{text-align:right;font-family:var(--font-mono);font-size:14px;font-weight:600;padding:12px 0}
.spec-foot{margin-top:18px;font-size:14px;color:var(--muted)}
@media (max-width:767px){
  .spec-grid{grid-template-columns:1fr}
  .spec-table th,.spec-table td{display:block;width:100%;text-align:left;padding:4px 0}
  .spec-table tr{padding:10px 0}
}

/* ---------- 评价墙 ---------- */
.reviews{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.review{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius-card);padding:26px;display:flex;flex-direction:column;gap:14px;transition:transform .18s,border-color .18s,box-shadow .18s}
.review:hover{transform:translateY(-4px);border-color:var(--accent);box-shadow:var(--shadow-2)}
.review:nth-child(2){transform:translateY(18px)}
.review:nth-child(2):hover{transform:translateY(14px)}
.stars{display:flex;gap:2px;color:var(--accent)}
.review blockquote{margin:0;font-size:15px;color:var(--ink-2);line-height:1.8}
.review-user{display:flex;align-items:center;gap:12px;border-top:1px solid var(--line);padding-top:14px}
.avatar{width:38px;height:38px;border-radius:50%;background:var(--surface-2);border:1px solid var(--line);display:grid;place-items:center;font-weight:700;color:var(--ink-2);font-size:14px;flex:none}
.review-user b{display:block;font-size:14px}
.review-user span{font-family:var(--font-mono);font-size:12px;color:var(--muted)}
@media (max-width:1023px){.reviews{grid-template-columns:1fr 1fr}.review:nth-child(2){transform:none}}
@media (max-width:767px){.reviews{grid-template-columns:1fr}.review{padding:22px}}

/* ---------- 下载区 ---------- */
.download{background:var(--dark);color:#fff}
.download-inner{display:grid;grid-template-columns:1fr auto;gap:36px;align-items:center}
.download h2{font-size:clamp(1.5rem,2.4vw,2.25rem);font-weight:800;letter-spacing:-.02em;margin-bottom:10px}
.download p{color:rgba(255,255,255,.72);max-width:560px;margin-bottom:22px}
.download-actions{display:flex;flex-wrap:wrap;gap:12px;margin-bottom:16px}
.download-meta{font-family:var(--font-mono);font-size:12px;color:rgba(255,255,255,.6)}
.qr-box{width:160px;height:160px;border-radius:var(--radius-img);border:1px dashed rgba(255,255,255,.4);display:grid;place-items:center;text-align:center;font-size:12px;color:rgba(255,255,255,.65);padding:12px;line-height:1.6}
@media (max-width:767px){.download-inner{grid-template-columns:1fr;gap:24px}.qr-box{width:100%;max-width:220px;height:150px}}

/* ---------- 资讯列表 ---------- */
.post-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.post-card{display:flex;flex-direction:column;overflow:hidden}
.post-thumb img{width:100%;aspect-ratio:16/10;object-fit:cover;border-radius:var(--radius-img)}
.post-thumb{padding:12px 12px 0}
.post-body{padding:18px 20px 22px;display:flex;flex-direction:column;gap:12px;flex:1}
.post-body .badge{align-self:flex-start}
.card-title{font-size:1.0625rem;font-weight:700;line-height:1.5;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.card-title a:hover{color:var(--accent-strong)}
.card-desc{font-size:14px;color:var(--muted);display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden}
.post-meta{margin-top:auto;display:flex;align-items:center;justify-content:space-between;gap:12px;border-top:1px solid var(--line);padding-top:12px;font-size:13px;color:var(--muted)}
.empty-state{border:1px dashed var(--line);border-radius:var(--radius-card);padding:44px 24px;text-align:center;background:var(--surface)}
.empty-state p{color:var(--muted);margin-bottom:16px}
.loading{display:block;height:14px;border-radius:3px;background:linear-gradient(90deg,var(--surface-2) 0%,#f7f7f4 50%,var(--surface-2) 100%);background-size:200% 100%;animation:shimmer 1.4s infinite linear}
@keyframes shimmer{0%{background-position:200% 0}100%{background-position:-200% 0}}
.error-note{border-left:3px solid var(--accent);background:var(--surface);padding:14px 18px;border-radius:0 var(--radius-btn) var(--radius-btn) 0;color:var(--ink-2);font-size:14px}
@media (max-width:1023px){.post-grid{grid-template-columns:1fr 1fr}}
@media (max-width:767px){.post-grid{grid-template-columns:1fr}}

/* ---------- FAQ ---------- */
.faq-list{border-top:1px solid var(--line)}
.faq-item{border-bottom:1px solid var(--line)}
.faq-item summary{display:flex;align-items:center;justify-content:space-between;gap:18px;padding:20px 0;font-size:1.0625rem;font-weight:700;cursor:pointer;list-style:none}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary::after{content:"";width:14px;height:14px;flex:none;background:
  linear-gradient(var(--accent),var(--accent)) center/14px 2px no-repeat,
  linear-gradient(var(--accent),var(--accent)) center/2px 14px no-repeat;
  transition:transform .25s ease}
.faq-item[open] summary::after{transform:rotate(45deg)}
.faq-item .faq-body{padding:0 0 22px 16px;border-left:3px solid var(--accent);color:var(--ink-2);font-size:15px;line-height:1.85}
@media (max-width:767px){.faq-item summary{font-size:1rem}}

/* ---------- 页脚 ---------- */
.site-footer{background:var(--dark);color:#fff;padding:clamp(44px,5vw,72px) 0 26px}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:32px;padding-bottom:32px;border-bottom:1px solid rgba(255,255,255,.12)}
.footer-brand .logo-text{color:#fff}
.footer-brand p{color:rgba(255,255,255,.66);font-size:14px;margin-top:14px;max-width:320px}
.footer-col h4{font-size:13px;letter-spacing:.14em;color:rgba(255,255,255,.55);font-weight:700;margin-bottom:14px}
.footer-col li{margin-bottom:10px}
.footer-col a{color:rgba(255,255,255,.82);font-size:14px;position:relative}
.footer-col a:hover{color:#fff}
.footer-col .mono{font-family:var(--font-mono);font-size:13px;color:rgba(255,255,255,.72)}
.footer-bottom{display:flex;flex-wrap:wrap;justify-content:space-between;gap:12px;padding-top:20px;font-size:13px;color:rgba(255,255,255,.55)}
@media (max-width:1023px){.footer-grid{grid-template-columns:1fr 1fr}}
@media (max-width:767px){.footer-grid{grid-template-columns:1fr;gap:26px}}

/* ---------- 入场动效 ---------- */
.reveal{opacity:0;transform:translateY(12px);transition:opacity .5s ease,transform .5s cubic-bezier(.2,.7,.2,1)}
.reveal.is-in{opacity:1;transform:none}
@media (prefers-reduced-motion: reduce){
  *{animation:none!important;transition:none!important}
  .reveal{opacity:1;transform:none}
  html{scroll-behavior:auto}
}

/* roulang page: article */
:root{
  --bg:#F4F4F0;
  --surface:#FFFFFF;
  --surface-2:#EDEEE8;
  --ink:#0E1013;
  --ink-2:#2B3036;
  --muted:#6C7278;
  --line:#E2E3DC;
  --accent:#FF5A1E;
  --accent-strong:#E8470D;
  --accent-soft:#FFF1EA;
  --signal:#0FB5A5;
  --dark:#101418;
  --radius-sm:10px;
  --radius:16px;
  --radius-lg:20px;
  --shadow-1:0 1px 2px rgba(14,16,19,.04);
  --shadow-2:0 16px 36px -18px rgba(14,16,19,.28);
  --ease:cubic-bezier(.2,.7,.2,1);
  --sans:"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",sans-serif;
  --mono:ui-monospace,"JetBrains Mono",Consolas,"Courier New",monospace;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  background:var(--bg);
  color:var(--ink-2);
  font-family:var(--sans);
  font-size:16px;
  line-height:1.75;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;height:auto}
a{color:inherit;text-decoration:none}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer}
input,textarea,select{font:inherit}
ul,ol{margin:0}
h1,h2,h3,h4{color:var(--ink);margin:0}
p{margin:0}
::selection{background:var(--accent);color:#fff}
:focus-visible{outline:2px solid var(--accent);outline-offset:2px}
.mono{font-family:var(--mono);font-variant-numeric:tabular-nums}
.container{width:min(1200px,100% - 48px);margin-inline:auto}
@media (max-width:1279px){.container{width:min(1080px,100% - 40px)}}
@media (max-width:767px){.container{width:calc(100% - 32px)}}

/* ---------- 通用按钮 / 标签 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  border-radius:var(--radius-sm);font-weight:700;letter-spacing:.01em;
  border:1px solid transparent;white-space:nowrap;cursor:pointer;
  transition:transform .18s var(--ease),background-color .18s var(--ease),color .18s var(--ease),border-color .18s var(--ease),box-shadow .18s var(--ease),filter .18s var(--ease);
}
.btn-sm{height:32px;padding:0 12px;font-size:13px}
.btn-md{height:40px;padding:0 18px;font-size:15px}
.btn-lg{height:52px;padding:0 26px;font-size:16px}
.btn-primary{background:var(--accent);color:#fff}
.btn-primary:hover{background:var(--accent-strong);transform:translateY(-1px);box-shadow:var(--shadow-2)}
.btn-primary:active{transform:translateY(1px)}
.btn-outline{border-color:var(--ink);color:var(--ink);background:transparent}
.btn-outline:hover{background:var(--ink);color:#fff;transform:translateY(-1px)}
.btn-outline:active{transform:translateY(1px)}
.btn-block{width:100%}
.text-link{position:relative;font-size:14px;font-weight:700;color:var(--ink)}
.text-link::after{content:"";position:absolute;left:0;bottom:-3px;height:1px;width:0;background:var(--accent);transition:width .22s var(--ease)}
.text-link:hover::after{width:100%}
.ghost-link{display:inline-flex;align-items:center;gap:6px;font-size:14px;font-weight:700;color:var(--ink-2)}
.ghost-link svg{transition:transform .22s var(--ease)}
.ghost-link:hover svg{transform:translateX(8px)}
.badge{
  display:inline-flex;align-items:center;gap:6px;
  padding:4px 12px;border-radius:999px;background:var(--accent-soft);
  color:var(--accent-strong);font-size:12px;font-weight:700;letter-spacing:.06em;
}
.tag-pill{
  display:inline-flex;align-items:center;height:30px;padding:0 14px;border-radius:999px;
  border:1px solid var(--line);background:var(--surface);color:var(--ink-2);
  font-size:13px;font-weight:600;transition:border-color .18s var(--ease),color .18s var(--ease),transform .18s var(--ease);
}
.tag-pill:hover{border-color:var(--accent);color:var(--accent-strong);transform:translateY(-2px)}

/* ---------- 导航 ---------- */
.site-header{
  position:sticky;top:0;z-index:60;
  background:rgba(255,255,255,.78);
  -webkit-backdrop-filter:blur(14px) saturate(140%);
  backdrop-filter:blur(14px) saturate(140%);
  border-bottom:1px solid var(--line);
}
.header-inner{display:flex;align-items:center;gap:24px;min-height:64px}
.logo{display:inline-flex;align-items:center;gap:10px;font-weight:800;font-size:16px;letter-spacing:-.01em;color:var(--ink)}
.logo-mark{width:32px;height:32px;border-radius:9px;background:var(--ink);color:#fff;display:grid;place-items:center;flex:none}
.logo-text em{font-style:normal;color:var(--accent)}
.main-nav{display:flex;align-items:center;gap:2px;margin-left:6px}
.nav-link{position:relative;display:inline-flex;align-items:center;height:44px;padding:0 12px;font-size:15px;color:var(--ink-2);border-radius:8px;transition:color .18s var(--ease),background-color .18s var(--ease)}
.nav-link::after{content:"";position:absolute;left:12px;right:12px;bottom:6px;height:2px;background:var(--accent);transform:scaleX(0);transform-origin:left;transition:transform .22s var(--ease)}
.nav-link:hover{color:var(--ink);background:var(--surface-2)}
.nav-link.is-active{color:var(--ink);font-weight:700}
.nav-link.is-active::after{transform:scaleX(1)}
.header-tools{display:flex;align-items:center;gap:14px;margin-left:auto}
.command-search{
  display:flex;align-items:center;gap:8px;width:240px;height:40px;padding:0 10px;
  border:1px solid var(--line);border-radius:var(--radius-sm);background:var(--surface);color:var(--muted);
  transition:width .22s var(--ease),border-color .18s var(--ease),box-shadow .18s var(--ease);
}
.command-search input{flex:1;min-width:0;border:0;background:none;outline:none;font-size:14px;color:var(--ink)}
.command-search input::placeholder{color:var(--muted)}
.command-search kbd{font-family:var(--mono);font-size:11px;line-height:1;padding:3px 5px;border:1px solid var(--line);border-radius:6px;background:var(--surface-2);color:var(--muted)}
.command-search:focus-within{width:320px;border-color:var(--accent);box-shadow:0 0 0 3px rgba(255,90,30,.18)}
.nav-mobile-extra{display:none}
.nav-toggle{display:none;width:44px;height:44px;border:1px solid var(--line);border-radius:var(--radius-sm);background:var(--surface);color:var(--ink);place-items:center}
.nav-backdrop{display:none;position:fixed;inset:0;background:rgba(14,16,19,.42);z-index:70}
.nav-backdrop.is-show{display:block}

/* ---------- 文章头 ---------- */
.article-hero{
  position:relative;
  background-image:linear-gradient(180deg,rgba(16,20,24,.86),rgba(16,20,24,.72)),url("/assets/images/backpic/back-1.webp");
  background-size:cover;background-position:center;
  color:#fff;padding:clamp(36px,6vw,72px) 0 clamp(32px,5vw,60px);
}
.article-hero::after{
  content:"";position:absolute;left:0;right:0;bottom:0;height:6px;
  background-image:repeating-linear-gradient(90deg,rgba(255,255,255,.34) 0 1px,transparent 1px 14px);
  opacity:.5;
}
.breadcrumb{display:flex;align-items:center;gap:8px;font-size:12px;color:rgba(255,255,255,.72);margin-bottom:18px;flex-wrap:wrap}
.breadcrumb a{color:rgba(255,255,255,.86)}
.breadcrumb a:hover{color:#fff;text-decoration:underline;text-underline-offset:3px}
.breadcrumb .crumb-current{max-width:280px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;color:rgba(255,255,255,.6)}
.article-hero h1{
  color:#fff;font-size:clamp(1.75rem,3.6vw,2.5rem);font-weight:800;line-height:1.2;
  letter-spacing:-.02em;max-width:900px;
}
.article-hero .hero-note{margin-top:14px;font-size:14px;color:rgba(255,255,255,.72);max-width:720px}
.meta-row{display:flex;align-items:center;gap:12px;flex-wrap:wrap;margin-top:18px;font-size:13px;color:rgba(255,255,255,.78)}
.meta-row .sep{width:1px;height:12px;background:rgba(255,255,255,.28)}
.meta-row .mono{font-size:13px}
.meta-pill{display:inline-flex;align-items:center;gap:6px;height:26px;padding:0 12px;border-radius:999px;background:var(--accent-soft);color:var(--accent-strong);font-size:12px;font-weight:700;letter-spacing:.06em}

/* ---------- 文章布局 ---------- */
.article-layout{display:grid;grid-template-columns:minmax(0,1fr) 280px;gap:56px;align-items:start;padding:56px 0 88px}
.article-main{min-width:0;background:var(--surface);border:1px solid var(--line);border-radius:var(--radius-lg);padding:clamp(22px,3vw,44px);box-shadow:var(--shadow-1)}
.article-body{max-width:740px;font-size:17px;line-height:1.9;color:var(--ink-2);overflow-wrap:anywhere}
.article-body > *:first-child{margin-top:0}
.article-body h2{position:relative;margin:2.1em 0 .8em;padding-left:15px;font-size:clamp(1.35rem,2.2vw,1.75rem);font-weight:800;letter-spacing:-.02em;line-height:1.32;color:var(--ink);scroll-margin-top:96px}
.article-body h2::before{content:"";position:absolute;left:0;top:.42em;width:3px;height:18px;background:var(--accent);border-radius:2px}
.article-body h3{margin:1.7em 0 .55em;font-size:1.15rem;font-weight:700;line-height:1.45;color:var(--ink);scroll-margin-top:96px}
.article-body h4{margin:1.4em 0 .5em;font-size:1.02rem;font-weight:700;color:var(--ink)}
.article-body p{margin:0 0 1.1em}
.article-body a{color:var(--accent-strong);border-bottom:1px solid currentColor}
.article-body a:hover{color:var(--accent)}
.article-body ul,.article-body ol{margin:0 0 1.1em;padding-left:1.4em}
.article-body li{margin:.35em 0}
.article-body ul li::marker{color:var(--accent)}
.article-body ol li::marker{color:var(--accent);font-family:var(--mono)}
.article-body blockquote{margin:1.4em 0;padding:16px 20px;border-left:3px solid var(--accent);background:var(--surface-2);border-radius:0 12px 12px 0;color:var(--ink-2)}
.article-body img{border-radius:12px;margin:1.4em auto;border:1px solid var(--line)}
.article-body figure{margin:1.4em 0}
.article-body figcaption{text-align:center;font-size:13px;color:var(--muted);margin-top:.6em}
.article-body hr{border:0;border-top:1px solid var(--line);margin:2em 0}
.article-body code{font-family:var(--mono);font-size:.9em;background:var(--surface-2);border:1px solid var(--line);border-radius:6px;padding:1px 5px}
.article-body pre{background:var(--surface-2);border:1px solid var(--line);border-radius:12px;padding:16px;overflow-x:auto;font-family:var(--mono);font-size:14px;line-height:1.7}
.article-body pre code{border:0;background:none;padding:0}
.article-body table{width:100%;border-collapse:collapse;margin:1.4em 0;font-size:15px}
.article-body th,.article-body td{border-bottom:1px solid var(--line);padding:10px 12px;text-align:left}
.article-body th{color:var(--muted);font-weight:700;font-size:13px;letter-spacing:.06em}
.article-body td.mono,.article-body td:last-child{font-variant-numeric:tabular-nums}

.tag-row{display:flex;flex-wrap:wrap;gap:10px;margin-top:40px}
.tail-divider{height:1px;background:var(--line);margin:32px 0}
.tail-title{font-size:1.15rem;font-weight:800;letter-spacing:-.01em;margin-bottom:18px}
.related-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:20px}
.related-card{
  display:flex;flex-direction:column;background:var(--surface);border:1px solid var(--line);
  border-radius:var(--radius);overflow:hidden;box-shadow:var(--shadow-1);
  transition:transform .18s var(--ease),border-color .18s var(--ease),box-shadow .18s var(--ease);
}
.related-card:hover{transform:translateY(-4px);border-color:var(--accent);box-shadow:var(--shadow-2)}
.related-card figure{margin:0;aspect-ratio:16/10;overflow:hidden;background:var(--surface-2)}
.related-card img{width:100%;height:100%;object-fit:cover}
.related-card .rc-body{padding:18px;display:flex;flex-direction:column;gap:8px;flex:1}
.related-card h4{font-size:15px;font-weight:700;line-height:1.5;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.related-card p{font-size:13px;color:var(--muted);display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.rc-meta{font-family:var(--mono);font-size:12px;color:var(--muted);margin-top:auto}
.back-row{margin-top:28px;display:flex;flex-wrap:wrap;gap:12px}

.empty-state{
  border:1px dashed var(--line);border-radius:var(--radius);padding:44px 24px;text-align:center;background:var(--surface-2);
}
.empty-state .empty-title{font-size:1.1rem;font-weight:800;color:var(--ink);margin-bottom:8px}
.empty-state p{color:var(--muted);font-size:14px;margin-bottom:18px}

/* ---------- 侧栏 ---------- */
.article-side{position:sticky;top:88px;display:grid;gap:20px}
.side-card{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);padding:20px;box-shadow:var(--shadow-1)}
.side-card h3{font-size:13px;font-weight:800;letter-spacing:.14em;color:var(--muted);margin-bottom:14px;text-transform:uppercase}
.toc-list{list-style:none;padding:0;display:grid;gap:2px;max-height:320px;overflow:auto}
.toc-list a{display:block;padding:7px 10px;font-size:14px;color:var(--muted);border-left:2px solid transparent;transition:background-color .18s var(--ease),color .18s var(--ease),border-color .18s var(--ease)}
.toc-list .lvl-3 a{padding-left:24px;font-size:13px}
.toc-list a:hover{background:var(--surface-2);color:var(--ink)}
.toc-list a.is-current{color:var(--accent-strong);border-left-color:var(--accent);font-weight:700}
.toc-empty{font-size:13px;color:var(--muted);border:1px dashed var(--line);border-radius:var(--radius-sm);padding:14px;text-align:center}
.dl-card{background:var(--dark);color:#fff;border-color:transparent}
.dl-card h3{color:rgba(255,255,255,.6)}
.dl-card p{font-size:13.5px;color:rgba(255,255,255,.7);line-height:1.7;margin-bottom:16px}
.dl-card .dl-ver{display:flex;justify-content:space-between;font-family:var(--mono);font-size:12px;color:rgba(255,255,255,.62);margin-top:14px;padding-top:12px;border-top:1px solid rgba(255,255,255,.14)}
.mini-list{list-style:none;padding:0;display:grid;gap:4px}
.mini-list a{display:flex;flex-direction:column;gap:4px;padding:10px;border-radius:var(--radius-sm);transition:background-color .18s var(--ease)}
.mini-list a:hover{background:var(--surface-2)}
.mini-list strong{font-size:14px;font-weight:700;color:var(--ink);display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.mini-list span{font-family:var(--mono);font-size:12px;color:var(--muted)}

/* ---------- 尾部 CTA ---------- */
.cta-band{background:var(--surface-2);border-radius:var(--radius-lg);padding:clamp(24px,3.4vw,40px);display:flex;flex-wrap:wrap;gap:20px;align-items:center;justify-content:space-between;margin-bottom:72px}
.cta-band h2{font-size:clamp(1.3rem,2.2vw,1.7rem);font-weight:800;letter-spacing:-.02em;margin-bottom:8px}
.cta-band p{font-size:14.5px;color:var(--muted);max-width:560px}
.cta-actions{display:flex;gap:12px;flex-wrap:wrap}

/* ---------- 页脚 ---------- */
.site-footer{background:var(--dark);color:#fff;padding:56px 0 24px}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1fr;gap:32px}
.site-footer .logo{color:#fff}
.site-footer .logo-mark{background:var(--accent)}
.footer-brand p{color:rgba(255,255,255,.62);font-size:14px;line-height:1.8;margin-top:16px;max-width:330px}
.footer-col h4{color:rgba(255,255,255,.55);font-size:12px;font-weight:700;letter-spacing:.16em;margin-bottom:16px}
.footer-col ul{list-style:none;padding:0;display:grid;gap:10px}
.footer-col a,.footer-col span{color:rgba(255,255,255,.8);font-size:14px}
.footer-col a:hover{color:#fff;text-decoration:underline;text-underline-offset:3px}
.footer-bottom{display:flex;flex-wrap:wrap;gap:12px;justify-content:space-between;margin-top:44px;padding-top:18px;border-top:1px solid rgba(255,255,255,.12);font-size:13px;color:rgba(255,255,255,.55)}

/* ---------- 响应式 ---------- */
@media (max-width:1279px){
  .article-layout{gap:40px}
}
@media (max-width:1023px){
  .header-tools .command-search,
  .header-tools .ghost-link,
  .header-tools .btn-primary{display:none}
  .nav-toggle{display:grid}
  .main-nav{
    position:fixed;top:0;right:0;height:100vh;width:min(340px,86vw);
    background:var(--surface);border-left:1px solid var(--line);
    flex-direction:column;align-items:stretch;gap:6px;padding:24px;
    margin:0;transform:translateX(102%);transition:transform .28s var(--ease);
    box-shadow:var(--shadow-2);z-index:80;overflow-y:auto;
  }
  .main-nav.is-open{transform:translateX(0)}
  .main-nav .nav-link{height:48px;font-size:16px;border-radius:var(--radius-sm)}
  .main-nav .nav-link::after{display:none}
  .main-nav .nav-link.is-active{background:var(--accent-soft);color:var(--accent-strong)}
  .nav-mobile-extra{display:grid;gap:14px;margin-top:20px;padding-top:20px;border-top:1px solid var(--line)}
  .nav-mobile-extra .command-search{width:100%}
  .nav-mobile-extra .command-search:focus-within{width:100%}
  .nav-mobile-extra .btn{width:100%;height:48px}
  .article-layout{grid-template-columns:1fr;gap:36px}
  .article-side{position:static}
  .related-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
  .footer-grid{grid-template-columns:1fr 1fr;gap:28px}
}
@media (max-width:767px){
  .header-inner{gap:12px}
  .article-hero{padding:32px 0 34px}
  .article-hero h1{font-size:1.6rem}
  .meta-row{gap:8px;font-size:12px}
  .meta-row .sep{display:none}
  .article-main{padding:20px;border-radius:var(--radius)}
  .article-body{font-size:16px;line-height:1.85}
  .cta-band{padding:22px;border-radius:var(--radius)}
  .related-grid{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr}
  .back-row .btn{width:100%}
}
@media (max-width:520px){
  .logo-text{font-size:15px}
  .article-hero h1{font-size:1.45rem}
}
@media (prefers-reduced-motion:reduce){
  *{animation-duration:.001ms !important;transition-duration:.001ms !important;scroll-behavior:auto !important}
  .related-card:hover,.btn:hover,.tag-pill:hover{transform:none}
}

/* roulang page: category1 */
:root{
  --bg:#F4F4F0;
  --surface:#FFFFFF;
  --surface-2:#EDEEE8;
  --ink:#0E1013;
  --ink-2:#2B3036;
  --muted:#6C7278;
  --line:#E2E3DC;
  --accent:#FF5A1E;
  --accent-strong:#E8470D;
  --accent-soft:#FFF1EA;
  --signal:#0FB5A5;
  --dark:#101418;
  --r-card:16px;
  --r-lg:20px;
  --r-btn:10px;
  --r-pill:999px;
  --sh-1:0 1px 2px rgba(14,16,19,.04);
  --sh-hover:0 16px 36px -18px rgba(14,16,19,.28);
  --ease:cubic-bezier(.2,.7,.2,1);
  --container:1200px;
  --mono:ui-monospace,"JetBrains Mono",Consolas,"Courier New",monospace;
}
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  background:var(--bg);
  color:var(--ink);
  font-family:"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei",system-ui,-apple-system,"Segoe 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{font:inherit;cursor:pointer;border:0;background:none;color:inherit;}
input{font:inherit;}
h1,h2,h3,h4,p,ul,ol,figure{margin:0;}
ul,ol{padding:0;list-style:none;}
:focus-visible{outline:2px solid var(--accent);outline-offset:2px;border-radius:6px;}
.mono{font-family:var(--mono);font-variant-numeric:tabular-nums;letter-spacing:-.01em;}
.container{width:100%;max-width:var(--container);margin:0 auto;padding:0 24px;}
@media (min-width:1024px) and (max-width:1279px){
  .container{max-width:1080px;}
}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  border-radius:var(--r-btn);font-weight:700;border:1px solid transparent;
  white-space:nowrap;text-align:center;
  transition:transform .18s var(--ease),background-color .18s var(--ease),color .18s var(--ease),border-color .18s var(--ease),box-shadow .18s var(--ease);
}
.btn svg{flex:0 0 auto;transition:transform .2s var(--ease);}
.btn-sm{height:32px;padding:0 14px;font-size:13px;}
.btn-md{height:40px;padding:0 18px;font-size:15px;}
.btn-lg{height:52px;padding:0 26px;font-size:16px;}
.btn-primary{background:var(--accent);color:#fff;box-shadow:0 6px 18px -10px rgba(255,90,30,.75);}
.btn-primary:hover{background:var(--accent-strong);transform:translateY(-1px);}
.btn-primary:active{transform:translateY(1px);}
.btn-outline{border-color:var(--ink);color:var(--ink);background:transparent;}
.btn-outline:hover{background:var(--ink);color:#fff;transform:translateY(-1px);}
.btn-outline:active{transform:translateY(1px);}
.btn-outline-invert{border-color:rgba(255,255,255,.4);color:#fff;}
.btn-outline-invert:hover{background:#fff;color:var(--ink);border-color:#fff;}
.btn-ghost{padding:0;font-weight:700;color:var(--ink);}
.btn-ghost:hover svg{transform:translateX(8px);}
.text-link{position:relative;font-weight:700;display:inline-block;}
.text-link::after{content:"";position:absolute;left:0;bottom:-3px;width:0;height:1px;background:currentColor;transition:width .24s var(--ease);}
.text-link:hover::after{width:100%;}

/* ---------- 头部导航 ---------- */
.site-header{
  position:sticky;top:0;z-index:60;
  background:rgba(255,255,255,.78);
  -webkit-backdrop-filter:blur(14px) saturate(140%);
  backdrop-filter:blur(14px) saturate(140%);
  border-bottom:1px solid var(--line);
}
.header-inner{display:flex;align-items:center;gap:20px;height:64px;}
.logo{display:flex;align-items:center;gap:10px;font-weight:800;letter-spacing:-.02em;flex:0 0 auto;}
.logo-mark{
  width:32px;height:32px;border-radius:9px;background:var(--ink);color:#fff;
  display:grid;place-items:center;flex:0 0 auto;
}
.logo-text{font-size:16px;line-height:1;white-space:nowrap;}
.logo-text em{font-style:normal;color:var(--muted);font-weight:600;}
.main-nav{display:flex;align-items:center;gap:2px;margin-left:6px;}
.nav-link{
  position:relative;padding:9px 12px;font-size:15px;line-height:1;color:var(--ink-2);
  border-radius:8px;transition:color .18s var(--ease),background-color .18s var(--ease);
}
.nav-link:hover{color:var(--ink);background:var(--surface-2);}
.nav-link.is-active{font-weight:700;color:var(--ink);}
.nav-link.is-active::after{content:"";position:absolute;left:12px;right:12px;bottom:0;height:2px;background:var(--accent);border-radius:2px;}
.header-tools{display:flex;align-items:center;gap:14px;margin-left:auto;flex:0 0 auto;}
.command-search{
  display:flex;align-items:center;gap:8px;height:40px;width:240px;padding:0 12px;
  border:1px solid var(--line);border-radius:var(--r-btn);background:var(--surface);color:var(--muted);
  transition:width .22s var(--ease),box-shadow .22s var(--ease),border-color .22s var(--ease);
}
.command-search input{
  flex:1 1 auto;min-width:0;border:0;outline:0;background:transparent;font-size:14px;color:var(--ink);
}
.command-search input::placeholder{color:var(--muted);}
.command-search kbd{
  font-family:var(--mono);font-size:11px;line-height:1;padding:4px 6px;border-radius:6px;
  border:1px solid var(--line);background:var(--surface-2);color:var(--muted);
}
.command-search:focus-within{width:320px;border-color:var(--accent);box-shadow:0 0 0 3px rgba(255,90,30,.18);}
.ghost-link{display:inline-flex;align-items:center;gap:6px;font-size:15px;font-weight:600;color:var(--ink-2);transition:color .18s var(--ease);}
.ghost-link:hover{color:var(--accent);}
.nav-toggle{
  display:none;width:44px;height:44px;border-radius:var(--r-btn);
  border:1px solid var(--line);background:var(--surface);color:var(--ink);
  place-items:center;
}
.nav-mobile-extra{display:none;}

/* ---------- 页面 Hero ---------- */
.page-hero{
  position:relative;overflow:hidden;background:var(--dark);color:#fff;
  min-height:clamp(260px,30vw,340px);display:flex;align-items:center;
}
.page-hero-bg{position:absolute;inset:0;background:url('/assets/images/backpic/back-2.webp') center/cover no-repeat;transform:scale(1.02);}
.page-hero-bg::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(96deg,rgba(16,20,24,.9) 0%,rgba(16,20,24,.72) 48%,rgba(16,20,24,.5) 100%);
}
.page-hero .container{position:relative;z-index:1;padding-top:clamp(40px,5vw,56px);padding-bottom:clamp(40px,5vw,56px);}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:12px;font-weight:700;letter-spacing:.18em;color:var(--accent);text-transform:uppercase;
}
.eyebrow-light{color:#FFB899;}
.page-hero h1{
  font-size:clamp(2rem,4vw,3rem);font-weight:800;letter-spacing:-.03em;line-height:1.1;
  margin:14px 0 0;
}
.page-hero .hero-sub{margin-top:12px;font-size:clamp(1rem,1.4vw,1.125rem);color:rgba(255,255,255,.8);max-width:560px;}
.crumb{
  margin-top:20px;display:flex;flex-wrap:wrap;align-items:center;gap:8px;
  font-size:12px;color:rgba(255,255,255,.55);
}
.crumb a{color:rgba(255,255,255,.75);transition:color .18s var(--ease);}
.crumb a:hover{color:#fff;}
.hero-meta{
  margin-top:18px;display:flex;flex-wrap:wrap;gap:10px;
}
.hero-chip{
  display:inline-flex;align-items:center;gap:6px;height:28px;padding:0 12px;border-radius:var(--r-pill);
  border:1px solid rgba(255,255,255,.22);background:rgba(255,255,255,.06);
  font-size:12px;font-weight:600;color:rgba(255,255,255,.85);
}

/* ---------- 布局 ---------- */
.content-layout{
  display:grid;grid-template-columns:minmax(0,2fr) minmax(0,1fr);
  gap:44px;padding:clamp(44px,5.5vw,76px) 0 clamp(48px,6vw,80px);
}
.main-col{min-width:0;}
.sidebar{position:sticky;top:88px;align-self:start;display:grid;gap:24px;min-width:0;}

/* ---------- 区块 ---------- */
.block + .block{margin-top:clamp(44px,5vw,68px);}
.block-title{
  position:relative;padding-left:16px;
  font-size:clamp(1.5rem,2.4vw,2.25rem);font-weight:800;letter-spacing:-.02em;line-height:1.2;
}
.block-title::before{
  content:"";position:absolute;left:0;top:.16em;width:4px;height:.9em;background:var(--accent);border-radius:2px;
}
.block-lead{margin-top:14px;color:var(--ink-2);font-size:16px;line-height:1.85;max-width:720px;}
.sub-title{font-size:1.125rem;font-weight:700;letter-spacing:-.01em;margin-bottom:10px;}
.body-text{color:var(--ink-2);font-size:16px;line-height:1.85;}
.body-text + .body-text{margin-top:14px;}

/* ---------- 设备网格 ---------- */
.device-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:20px;margin-top:28px;}
.device-card{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--r-card);
  padding:24px;box-shadow:var(--sh-1);
  transition:transform .18s var(--ease),border-color .18s var(--ease),box-shadow .18s var(--ease);
}
.device-card:nth-child(even){margin-top:28px;}
.device-card:hover{transform:translateY(-4px);border-color:var(--accent);box-shadow:var(--sh-hover);}
.device-icon{
  width:40px;height:40px;border-radius:12px;display:grid;place-items:center;
  background:var(--accent-soft);color:var(--accent);margin-bottom:16px;
}
.device-card h3{font-size:1.0625rem;font-weight:700;line-height:1.35;}
.device-card p{margin-top:8px;font-size:14.5px;line-height:1.8;color:var(--muted);}
.tag-row{display:flex;flex-wrap:wrap;gap:8px;margin-top:16px;}
.tag{
  display:inline-flex;align-items:center;height:24px;padding:0 10px;border-radius:var(--r-pill);
  background:var(--accent-soft);color:var(--accent-strong);font-size:12px;font-weight:700;
}
.tag-mono{
  display:inline-flex;align-items:center;height:24px;padding:0 10px;border-radius:6px;
  background:var(--surface-2);color:var(--ink-2);font-family:var(--mono);font-size:12px;font-weight:600;
}

/* ---------- 规格表 ---------- */
.spec-wrap{margin-top:26px;overflow-x:auto;}
.spec-table{width:100%;border-collapse:collapse;min-width:520px;}
.spec-table th{
  text-align:left;font-size:12px;font-weight:700;letter-spacing:.14em;color:var(--muted);
  padding:0 16px 12px 0;border-bottom:1px solid var(--ink);
}
.spec-table td{
  padding:0 16px 0 0;font-size:15px;color:var(--ink-2);border-bottom:1px solid var(--line);
}
.spec-table tr{height:52px;}
.spec-table td:first-child{color:var(--muted);width:26%;}
.spec-table td.spec-val{font-family:var(--mono);font-variant-numeric:tabular-nums;font-weight:600;color:var(--ink);width:32%;}
.spec-table tr:hover td{background:var(--surface-2);}
.spec-note{margin-top:18px;font-size:14.5px;color:var(--muted);}

/* ---------- 图片 ---------- */
.figure{margin-top:28px;}
.figure-frame{
  border:1px solid var(--line);border-radius:var(--r-lg);overflow:hidden;background:var(--surface-2);
}
.figure-frame img{width:100%;object-fit:cover;}
.figure-frame.ratio-16-10 img{aspect-ratio:16/10;}
.figure-frame.ratio-4-3 img{aspect-ratio:4/3;}
.figure figcaption{margin-top:12px;font-size:13px;color:var(--muted);text-align:center;}

.media-row{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1.1fr);gap:28px;align-items:center;margin-top:26px;}
.media-row .figure{margin-top:0;}
.dot-list{margin-top:14px;display:grid;gap:10px;}
.dot-list li{position:relative;padding-left:18px;font-size:15px;color:var(--ink-2);}
.dot-list li::before{
  content:"";position:absolute;left:0;top:.62em;width:8px;height:8px;border-radius:2px;background:var(--accent);
}

/* ---------- 步骤 ---------- */
.steps{margin-top:28px;border-top:1px solid var(--line);}
.step{
  display:grid;grid-template-columns:64px minmax(0,1fr);gap:20px;
  padding:22px 0;border-bottom:1px solid var(--line);transition:background-color .18s var(--ease);
}
.step:hover{background:var(--surface-2);}
.step-no{
  font-family:var(--mono);font-size:13px;font-weight:700;color:var(--accent);
  letter-spacing:.06em;padding-top:3px;
}
.step h3{font-size:1.0625rem;font-weight:700;}
.step p{margin-top:6px;font-size:14.5px;line-height:1.8;color:var(--muted);}

/* ---------- 侧栏 ---------- */
.side-card{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--r-card);
  padding:24px;box-shadow:var(--sh-1);
}
.side-card h3{font-size:1rem;font-weight:800;letter-spacing:-.01em;margin-bottom:6px;}
.side-card .side-desc{font-size:13.5px;color:var(--muted);line-height:1.75;margin-bottom:14px;}
.side-list{display:grid;}
.side-list li{
  position:relative;padding:11px 0 11px 16px;font-size:14.5px;color:var(--ink-2);
  border-bottom:1px dashed var(--line);
}
.side-list li:last-child{border-bottom:0;}
.side-list li::before{content:"";position:absolute;left:0;top:19px;width:8px;height:2px;background:var(--accent);border-radius:2px;}
.side-card.dark{background:var(--dark);border-color:#1D242B;color:#fff;}
.side-card.dark h3{color:#fff;}
.side-card.dark .side-desc{color:rgba(255,255,255,.6);}
.side-card.dark .side-list li{color:rgba(255,255,255,.78);border-color:rgba(255,255,255,.12);}
.side-card .btn{width:100%;margin-top:18px;}
.side-links{display:grid;gap:12px;}
.side-links a{display:flex;align-items:center;justify-content:space-between;gap:10px;font-size:14.5px;font-weight:600;color:var(--ink-2);transition:color .18s var(--ease);}
.side-links a:hover{color:var(--accent);}
.side-links a svg{flex:0 0 auto;transition:transform .2s var(--ease);}
.side-links a:hover svg{transform:translateX(4px);}
.side-stat{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:14px;margin-top:6px;}
.side-stat div{border-left:2px solid var(--accent);padding-left:12px;}
.side-stat strong{display:block;font-family:var(--mono);font-size:1.25rem;font-weight:700;letter-spacing:-.02em;}
.side-stat span{font-size:12px;color:var(--muted);}

/* ---------- FAQ ---------- */
.faq{margin-top:26px;border-top:1px solid var(--line);}
.faq-item{border-bottom:1px solid var(--line);}
.faq-item summary{
  display:flex;align-items:center;justify-content:space-between;gap:20px;
  padding:20px 0;font-size:17px;font-weight:700;line-height:1.5;cursor:pointer;list-style:none;
}
.faq-item summary::-webkit-details-marker{display:none;}
.faq-item summary:hover{color:var(--accent-strong);}
.faq-icon{
  flex:0 0 auto;width:22px;height:22px;color:var(--accent);
  transition:transform .25s var(--ease);
}
.faq-item[open] .faq-icon{transform:rotate(45deg);}
.faq-body{
  padding:0 0 22px 16px;margin-bottom:6px;border-left:3px solid var(--accent);
  color:var(--ink-2);font-size:15.5px;line-height:1.85;max-width:720px;
}

/* ---------- 底部 CTA ---------- */
.cta-strip{
  background:var(--surface-2);border:1px solid var(--line);border-radius:var(--r-lg);
  padding:clamp(30px,4vw,48px);
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:26px;
  margin-bottom:clamp(48px,6vw,80px);
}
.cta-strip h2{font-size:clamp(1.35rem,2.1vw,1.875rem);font-weight:800;letter-spacing:-.02em;line-height:1.25;}
.cta-strip p{margin-top:10px;font-size:15px;color:var(--muted);max-width:520px;}
.cta-actions{display:flex;flex-wrap:wrap;gap:12px;}

/* ---------- 页脚 ---------- */
.site-footer{background:var(--dark);color:rgba(255,255,255,.72);}
.footer-grid{
  display:grid;grid-template-columns:1.6fr 1fr 1fr 1fr;gap:32px;
  padding:clamp(48px,6vw,72px) 0 34px;
}
.footer-brand .logo-mark{background:var(--accent);color:#fff;}
.footer-brand .logo-text{color:#fff;}
.footer-brand .logo-text em{color:rgba(255,255,255,.55);}
.footer-brand p{margin-top:16px;font-size:14px;line-height:1.85;color:rgba(255,255,255,.6);max-width:320px;}
.footer-col h4{font-size:13px;font-weight:700;letter-spacing:.12em;color:#fff;margin-bottom:16px;}
.footer-col ul{display:grid;gap:11px;}
.footer-col li{font-size:14px;}
.footer-col a{transition:color .18s var(--ease);}
.footer-col a:hover{color:var(--accent);}
.footer-col .mono{font-size:13.5px;color:rgba(255,255,255,.65);}
.footer-bottom{
  display:flex;flex-wrap:wrap;gap:10px;justify-content:space-between;
  border-top:1px solid rgba(255,255,255,.12);padding:20px 0 30px;
  font-size:13px;color:rgba(255,255,255,.5);
}

/* ---------- 入场动效 ---------- */
.rise{opacity:0;animation:rise .62s var(--ease) forwards;}
.rise-2{animation-delay:.06s;}
.rise-3{animation-delay:.12s;}
.rise-4{animation-delay:.18s;}
@keyframes rise{from{opacity:0;transform:translateY(12px);}to{opacity:1;transform:translateY(0);}}

/* ---------- 响应式 ---------- */
@media (max-width:1180px){
  .command-search{width:190px;}
  .command-search:focus-within{width:250px;}
}
@media (max-width:1023px){
  .header-inner{gap:14px;}
  .main-nav{
    position:fixed;top:0;right:0;z-index:55;
    width:min(330px,88vw);height:100vh;
    display:flex;flex-direction:column;align-items:stretch;gap:4px;
    background:var(--surface);padding:88px 22px 26px;
    box-shadow:-14px 0 44px -22px rgba(14,16,19,.45);
    border-left:1px solid var(--line);
    transform:translateX(105%);transition:transform .3s var(--ease);
    overflow-y:auto;margin-left:0;
  }
  .main-nav.is-open{transform:translateX(0);}
  .nav-link{padding:14px 12px;font-size:16px;border-radius:10px;}
  .nav-link.is-active::after{left:12px;right:auto;width:18px;bottom:8px;}
  .header-tools .command-search,
  .header-tools .ghost-link,
  .header-tools > .btn{display:none;}
  .nav-toggle{display:grid;}
  .nav-mobile-extra{display:grid;gap:14px;margin-top:22px;padding-top:22px;border-top:1px solid var(--line);}
  .nav-mobile-extra .command-search{width:100%;}
  .nav-mobile-extra .command-search:focus-within{width:100%;}
  .nav-mobile-extra .btn{width:100%;height:48px;}
  .content-layout{grid-template-columns:minmax(0,1fr);gap:36px;}
  .sidebar{position:static;top:auto;}
  .device-card:nth-child(even){margin-top:0;}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px 28px;}
}
@media (max-width:767px){
  .container{padding:0 16px;}
  .logo-text{font-size:15px;}
  .device-grid{grid-template-columns:minmax(0,1fr);gap:16px;}
  .device-card{padding:20px;}
  .media-row{grid-template-columns:minmax(0,1fr);gap:20px;}
  .step{grid-template-columns:44px minmax(0,1fr);gap:14px;}
  .spec-table{min-width:0;}
  .spec-table thead{display:none;}
  .spec-table tr{display:block;height:auto;padding:14px 0;border-bottom:1px solid var(--line);}
  .spec-table td{display:block;width:auto !important;padding:2px 0;border-bottom:0;}
  .spec-table td:first-child{font-size:12px;font-weight:700;letter-spacing:.12em;color:var(--muted);}
  .faq-item summary{font-size:16px;padding:18px 0;}
  .cta-strip{flex-direction:column;align-items:flex-start;}
  .cta-actions{width:100%;}
  .cta-actions .btn{flex:1 1 100%;}
  .footer-grid{grid-template-columns:minmax(0,1fr);gap:28px;}
  .footer-bottom{flex-direction:column;gap:8px;}
  .side-stat{grid-template-columns:repeat(2,minmax(0,1fr));}
}
@media (max-width:400px){
  .page-hero h1{font-size:1.75rem;}
  .hero-chip{font-size:11px;padding:0 10px;}
}
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{animation-duration:.001ms !important;animation-iteration-count:1 !important;transition-duration:.001ms !important;scroll-behavior:auto !important;}
  .rise{opacity:1;transform:none;}
}

/* roulang page: category2 */
:root{
  --bg:#F4F4F0;
  --surface:#FFFFFF;
  --surface-2:#EDEEE8;
  --ink:#0E1013;
  --ink-2:#2B3036;
  --muted:#6C7278;
  --line:#E2E3DC;
  --accent:#FF5A1E;
  --accent-strong:#E8470D;
  --accent-soft:#FFF1EA;
  --signal:#0FB5A5;
  --dark:#101418;
  --r-card:16px;
  --r-img:20px;
  --r-btn:10px;
  --r-pill:999px;
  --sh-1:0 1px 2px rgba(14,16,19,.04);
  --sh-2:0 16px 36px -18px rgba(14,16,19,.28);
  --ease:cubic-bezier(.2,.7,.2,1);
  --font-sans:"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",sans-serif;
  --font-mono:ui-monospace,"JetBrains Mono",Consolas,"Courier New",monospace;
  --section-space:clamp(56px,7vw,108px);
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  margin:0;
  background:var(--bg);
  color:var(--ink);
  font-family:var(--font-sans);
  font-size:16px;
  line-height:1.75;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}
img{max-width:100%;display:block;height:auto}
a{color:inherit;text-decoration:none}
button,input{font:inherit;color:inherit}
h1,h2,h3,h4,p,ul,ol,figure{margin:0}
ul,ol{padding:0;list-style:none}
:focus-visible{outline:2px solid var(--accent);outline-offset:2px}
.mono{font-family:var(--font-mono);font-variant-numeric:tabular-nums}

.container{width:100%;max-width:1200px;margin:0 auto;padding:0 24px}

/* ---------- header ---------- */
.site-header{
  position:sticky;top:0;z-index:70;
  background:rgba(255,255,255,.78);
  -webkit-backdrop-filter:blur(14px) saturate(140%);
  backdrop-filter:blur(14px) saturate(140%);
  border-bottom:1px solid var(--line);
}
.header-inner{display:flex;align-items:center;gap:16px;height:64px}
.logo{display:inline-flex;align-items:center;gap:10px;flex:none}
.logo-mark{
  width:34px;height:34px;border-radius:10px;display:grid;place-items:center;
  background:var(--ink);color:#fff;flex:none;
}
.logo-text{font-size:16px;font-weight:800;letter-spacing:-.01em;color:var(--ink);white-space:nowrap}
.logo-text em{font-style:normal;color:var(--accent)}
.main-nav{display:flex;align-items:center;gap:2px;margin-left:8px}
.nav-link{
  position:relative;display:inline-flex;align-items:center;height:40px;
  padding:0 12px;border-radius:8px;font-size:15px;color:var(--ink-2);
  transition:color .18s var(--ease),background-color .18s var(--ease);
}
.nav-link::after{
  content:"";position:absolute;left:12px;right:12px;bottom:6px;height:2px;
  background:var(--accent);transform:scaleX(0);transform-origin:left;
  transition:transform .2s var(--ease);
}
.nav-link:hover{color:var(--ink);background:var(--surface-2)}
.nav-link.is-active{font-weight:700;color:var(--ink)}
.nav-link.is-active::after{transform:scaleX(1)}
.header-tools{display:flex;align-items:center;gap:12px;margin-left:auto}
.nav-mobile-extra{display:none}
.command-search{
  display:flex;align-items:center;gap:8px;height:40px;width:240px;
  padding:0 10px;background:var(--surface);color:var(--muted);
  border:1px solid var(--line);border-radius:var(--r-btn);
  transition:width .24s var(--ease),border-color .18s var(--ease),box-shadow .18s var(--ease);
}
.command-search input{
  flex:1;min-width:0;border:0;background:transparent;outline:none;
  font-size:14px;color:var(--ink);
}
.command-search input::placeholder{color:var(--muted)}
.command-search kbd{
  font-family:var(--font-mono);font-size:11px;color:var(--muted);
  border:1px solid var(--line);background:var(--surface-2);
  border-radius:6px;padding:2px 6px;
}
.command-search:focus-within{
  width:320px;border-color:var(--accent);
  box-shadow:0 0 0 3px rgba(255,90,30,.18);
}
.text-link{
  position:relative;display:inline-block;font-size:14px;font-weight:600;
  color:var(--ink-2);padding-bottom:2px;
}
.text-link::after{
  content:"";position:absolute;left:0;bottom:0;height:1px;width:100%;
  background:currentColor;transform:scaleX(0);transform-origin:left;
  transition:transform .22s var(--ease);
}
.text-link:hover::after{transform:scaleX(1)}
.nav-toggle{
  display:none;align-items:center;justify-content:center;
  width:44px;height:44px;border:1px solid var(--line);border-radius:var(--r-btn);
  background:var(--surface);cursor:pointer;
}
.nav-toggle:hover{background:var(--surface-2)}

/* ---------- buttons ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  border:1px solid transparent;border-radius:var(--r-btn);
  font-weight:700;cursor:pointer;white-space:nowrap;text-align:center;
  transition:transform .16s var(--ease),background-color .18s var(--ease),
             color .18s var(--ease),border-color .18s var(--ease),box-shadow .18s var(--ease);
}
.btn-sm{height:32px;padding:0 14px;font-size:13px}
.btn-md{height:40px;padding:0 18px;font-size:15px}
.btn-lg{height:52px;padding:0 26px;font-size:16px}
.btn-primary{background:var(--accent);color:#fff;box-shadow:0 1px 0 rgba(14,16,19,.12)}
.btn-primary:hover{background:var(--accent-strong);transform:translateY(-1px)}
.btn-primary:active{transform:translateY(1px)}
.btn-secondary{background:transparent;color:var(--ink);border-color:var(--ink)}
.btn-secondary:hover{background:var(--ink);color:#fff}
.btn-ghost{background:transparent;color:var(--ink);padding:0;height:auto;font-weight:600}
.btn-ghost svg{transition:transform .18s var(--ease)}
.btn-ghost:hover svg{transform:translateX(8px)}
.btn[disabled],.is-disabled{opacity:.4;cursor:not-allowed;pointer-events:none}

/* ---------- hero ---------- */
.cat-hero{
  position:relative;display:flex;align-items:center;
  min-height:300px;padding:clamp(48px,6vw,84px) 0;
  color:#fff;
  background-image:linear-gradient(rgba(16,20,24,.67),rgba(16,20,24,.67)),url("/assets/images/backpic/back-1.webp");
  background-size:cover;background-position:center;
}
.cat-hero .eyebrow{color:#FFB79C}
.cat-hero h1{
  font-size:clamp(1.9rem,3.6vw,2.85rem);line-height:1.12;
  font-weight:800;letter-spacing:-.03em;margin:0 0 14px;max-width:22ch;
}
.cat-hero .sub{
  font-size:clamp(1rem,1.3vw,1.125rem);color:rgba(255,255,255,.84);
  margin:0 0 18px;max-width:640px;
}
.breadcrumb{display:flex;align-items:center;gap:8px;flex-wrap:wrap;font-size:12px;color:rgba(255,255,255,.66)}
.breadcrumb a:hover{color:#fff;text-decoration:underline}

/* ---------- sections ---------- */
.section{padding-top:calc(var(--section-space)/2);padding-bottom:calc(var(--section-space)/2)}
.section-head{
  display:flex;align-items:flex-end;justify-content:space-between;
  gap:24px;flex-wrap:wrap;margin-bottom:24px;
}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;margin-bottom:12px;
  font-size:12px;font-weight:700;letter-spacing:.18em;color:var(--accent);
}
.section-title{font-size:clamp(1.5rem,2.4vw,2.25rem);font-weight:800;letter-spacing:-.02em;line-height:1.2}
.section-desc{color:var(--muted);font-size:15px;max-width:62ch;margin-top:12px}

/* ---------- split rows ---------- */
.split{
  display:grid;grid-template-columns:1fr 1fr;
  gap:clamp(24px,4vw,56px);align-items:center;
}
.split.reverse > .split-media{order:2}
.media-frame{
  border-radius:var(--r-img);overflow:hidden;background:var(--surface-2);
  border:1px solid var(--line);box-shadow:var(--sh-1);
}
.media-frame img{width:100%;aspect-ratio:16/10;object-fit:cover;transition:transform .5s var(--ease)}
.media-frame.ratio-4x3 img{aspect-ratio:4/3}
.media-frame:hover img{transform:scale(1.025)}
.split-body p{color:var(--ink-2);margin-bottom:14px}
.split-body h2{font-size:clamp(1.35rem,2vw,1.9rem);font-weight:800;letter-spacing:-.02em;line-height:1.25;margin-bottom:14px}
.tag-list{display:flex;flex-wrap:wrap;gap:8px;margin:18px 0}
.tag{
  font-family:var(--font-mono);font-variant-numeric:tabular-nums;
  font-size:12px;padding:4px 10px;border-radius:var(--r-pill);
  background:var(--surface-2);color:var(--ink-2);border:1px solid var(--line);
}
.badge{
  display:inline-flex;align-items:center;gap:6px;font-size:12px;font-weight:700;
  padding:4px 12px;border-radius:var(--r-pill);background:var(--accent-soft);color:var(--accent-strong);
}
.feature-list{display:grid;gap:12px;margin:18px 0 24px}
.feature-list li{position:relative;padding-left:20px;color:var(--ink-2);font-size:15px}
.feature-list li::before{
  content:"";position:absolute;left:0;top:.6em;width:8px;height:8px;
  background:var(--accent);border-radius:2px;
}
.btn-row{display:flex;flex-wrap:wrap;gap:12px;align-items:center}

/* ---------- steps ---------- */
.steps{display:grid;grid-template-columns:repeat(4,1fr);gap:0}
.step{
  position:relative;padding:28px 24px 0 0;border-top:1px solid var(--line);
}
.step::before{
  content:"";position:absolute;top:-1px;left:0;width:34px;height:3px;background:var(--accent);
}
.step-num{font-family:var(--font-mono);font-size:12px;letter-spacing:.1em;color:var(--muted)}
.step h3{font-size:1.0625rem;font-weight:700;margin:10px 0 8px}
.step p{color:var(--muted);font-size:14px;line-height:1.7}

/* ---------- rows ---------- */
.rows{border-top:1px solid var(--line)}
.row{
  display:grid;grid-template-columns:12px 1fr auto;gap:20px;align-items:start;
  padding:20px 12px 20px 0;border-bottom:1px solid var(--line);
  transition:background-color .18s var(--ease);
}
.row::before{
  content:"";width:3px;height:100%;min-height:28px;border-radius:2px;
  background:var(--line);transition:background-color .18s var(--ease);
}
.row:hover{background:var(--surface-2)}
.row:hover::before{background:var(--accent)}
.row h3{font-size:1.0625rem;font-weight:700;margin-bottom:4px}
.row p{color:var(--muted);font-size:14px;line-height:1.7}
.row .row-meta{font-family:var(--font-mono);font-size:12px;color:var(--muted);padding-top:4px}

/* ---------- empty state ---------- */
.empty-state{
  border:1px dashed var(--line);border-radius:var(--r-card);
  background:var(--surface);padding:clamp(24px,3vw,32px);
  display:flex;align-items:center;justify-content:space-between;
  gap:24px;flex-wrap:wrap;margin-top:32px;
}
.empty-state .empty-main{display:flex;align-items:center;gap:16px;min-width:260px}
.empty-icon{
  width:44px;height:44px;flex:none;border-radius:12px;display:grid;place-items:center;
  background:var(--accent-soft);color:var(--accent-strong);
}
.empty-state h3{font-size:1.0625rem;font-weight:700;margin-bottom:2px}
.empty-state p{color:var(--muted);font-size:14px}

/* ---------- faq ---------- */
.faq{border-top:1px solid var(--line)}
.faq-item{border-bottom:1px solid var(--line)}
.faq-q{
  width:100%;display:flex;align-items:center;justify-content:space-between;
  gap:16px;padding:20px 0;background:none;border:0;cursor:pointer;
  text-align:left;font-size:18px;font-weight:700;color:var(--ink);
}
.faq-icon{flex:none;width:22px;height:22px;display:grid;place-items:center;color:var(--accent);transition:transform .25s var(--ease)}
.faq-item.is-open .faq-icon{transform:rotate(45deg)}
.faq-a{display:grid;grid-template-rows:0fr;transition:grid-template-rows .28s var(--ease)}
.faq-item.is-open .faq-a{grid-template-rows:1fr}
.faq-a > div{overflow:hidden;padding-left:16px;border-left:3px solid transparent;transition:border-color .25s var(--ease)}
.faq-item.is-open .faq-a > div{border-left-color:var(--accent);padding-bottom:20px}
.faq-a p{color:var(--ink-2);font-size:15px;max-width:74ch}

/* ---------- cta band ---------- */
.cta-band{
  background:var(--surface-2);border:1px solid var(--line);border-radius:20px;
  padding:clamp(28px,4vw,48px);
  display:grid;grid-template-columns:1.1fr .9fr;gap:clamp(24px,4vw,48px);align-items:center;
}
.cta-band h2{font-size:clamp(1.4rem,2.2vw,2rem);font-weight:800;letter-spacing:-.02em;line-height:1.25;margin-bottom:12px}
.cta-band .cta-desc{color:var(--ink-2);font-size:15px;margin-bottom:22px;max-width:52ch}
.field{display:grid;gap:8px}
.label{font-size:13px;font-weight:700;letter-spacing:.06em;color:var(--ink-2)}
.input{
  height:44px;width:100%;padding:0 14px;background:#fff;
  border:1px solid var(--line);border-radius:var(--r-btn);
  transition:border-color .18s var(--ease),box-shadow .18s var(--ease);
}
.input::placeholder{color:var(--muted)}
.input:focus{outline:none;border-color:var(--accent);box-shadow:0 0 0 3px rgba(255,90,30,.18)}
.form-row{display:flex;gap:12px;flex-wrap:wrap}
.form-row .input{flex:1;min-width:180px}
.form-error{display:none;color:#C4320A;font-size:13px;margin-top:10px}
.form-error.is-visible{display:block}
.form-note{font-size:12px;color:var(--muted);margin-top:10px}

/* ---------- loading / skeleton ---------- */
.skeleton{height:14px;border-radius:3px;background:#E6E7E0;position:relative;overflow:hidden}
.skeleton::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(90deg,transparent,rgba(255,255,255,.72),transparent);
  animation:shimmer 1.4s infinite;
}
@keyframes shimmer{0%{transform:translateX(-100%)}100%{transform:translateX(100%)}}

/* ---------- reveal ---------- */
.reveal{opacity:0;transform:translateY(12px);transition:opacity .5s var(--ease),transform .5s var(--ease);transition-delay:var(--d,0ms)}
.reveal.is-in{opacity:1;transform:none}

/* ---------- footer ---------- */
.site-footer{background:var(--dark);color:#fff;padding:clamp(48px,6vw,72px) 0 0}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:32px}
.site-footer .logo-mark{background:#fff;color:var(--dark)}
.site-footer .logo-text{color:#fff}
.site-footer .logo-text em{color:var(--accent)}
.footer-brand p{color:rgba(255,255,255,.62);font-size:14px;line-height:1.8;margin-top:16px;max-width:34ch}
.footer-col h4{font-size:13px;font-weight:700;letter-spacing:.12em;color:rgba(255,255,255,.5);margin-bottom:16px}
.footer-col ul{display:grid;gap:10px}
.footer-col a{font-size:14px;color:rgba(255,255,255,.8);transition:color .18s var(--ease)}
.footer-col a:hover{color:var(--accent)}
.footer-col .mono{font-size:13px;color:rgba(255,255,255,.7)}
.footer-bottom{
  margin-top:48px;border-top:1px solid rgba(255,255,255,.12);
  padding:20px 0 28px;display:flex;align-items:center;justify-content:space-between;
  gap:12px;flex-wrap:wrap;font-size:13px;color:rgba(255,255,255,.5);
}

/* ---------- responsive ---------- */
@media (max-width:1279px){
  .container{max-width:1080px}
}
@media (max-width:1023px){
  .split{grid-template-columns:1fr}
  .split.reverse > .split-media{order:0}
  .steps{grid-template-columns:repeat(2,1fr)}
  .step{padding-right:20px}
  .cta-band{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr 1fr}
}
@media (max-width:767px){
  .container{padding:0 18px}
  .header-inner{gap:10px}
  .header-tools .command-search,
  .header-tools .ghost-link,
  .header-tools .btn-primary{display:none}
  .nav-toggle{display:inline-flex}
  .main-nav{
    position:fixed;top:0;right:0;bottom:0;z-index:80;
    width:min(88vw,360px);margin:0;padding:76px 20px 28px;
    flex-direction:column;align-items:stretch;gap:4px;overflow-y:auto;
    background:#fff;box-shadow:-18px 0 40px -24px rgba(14,16,19,.4);
    transform:translateX(102%);transition:transform .3s var(--ease);
  }
  .main-nav.is-open{transform:translateX(0)}
  .nav-link{height:48px;font-size:16px;padding:0 12px}
  .nav-link::after{bottom:10px}
  .nav-mobile-extra{display:flex;flex-direction:column;gap:12px;order:-1;margin-bottom:12px}
  .nav-mobile-extra .command-search{width:100%}
  .nav-mobile-extra .command-search:focus-within{width:100%}
  .nav-mobile-extra .btn{width:100%;height:48px}
  .row{grid-template-columns:12px 1fr;gap:16px}
  .row .row-meta{grid-column:2;padding-top:0}
  .empty-state{align-items:flex-start}
  .footer-grid{grid-template-columns:1fr;gap:28px}
  .footer-bottom{flex-direction:column;align-items:flex-start}
}
@media (max-width:520px){
  .steps{grid-template-columns:1fr}
  .faq-q{font-size:16px}
  .btn-lg{width:100%}
  .form-row .btn{width:100%}
}
@media (prefers-reduced-motion:reduce){
  *{animation-duration:.001ms !important;animation-iteration-count:1 !important;transition-duration:.001ms !important}
  .reveal{opacity:1;transform:none}
}