/* roulang page: index */
:root{
  --green:#0FA97A;
  --green-soft:rgba(15,169,122,.08);
  --ink:#101319;
  --ink-2:#2B3038;
  --lime:#D6F24A;
  --paper:#F7F6F2;
  --card:#FFFFFF;
  --line:#E3E1DB;
  --dark:#0D0F12;
  --muted:#5C646F;
  --warn:#F2A93B;
  --err:#E2544A;
  --r-card:16px;
  --r-img:12px;
  --r-input:12px;
  --r-pill:999px;
  --sh-1:0 1px 2px rgba(16,19,25,.04), 0 8px 24px -12px rgba(16,19,25,.14);
  --sh-2:0 2px 4px rgba(16,19,25,.06), 0 18px 40px -16px rgba(16,19,25,.22);
  --maxw:1200px;
  --font:system-ui,-apple-system,"PingFang SC","HarmonyOS Sans SC","Source Han Sans SC","Microsoft YaHei",sans-serif;
  --mono:ui-monospace,"SF Mono",Menlo,Consolas,monospace;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;font-family:var(--font);background:var(--paper);color:var(--ink);
  font-size:16px;line-height:1.85;-webkit-font-smoothing:antialiased;overflow-x:hidden;
}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
button{font:inherit;color:inherit;cursor:pointer;border:0;background:none}
h1,h2,h3,h4,p,ul,ol,figure,blockquote{margin:0;padding:0}
ul,ol{list-style:none}
input,textarea,select{font:inherit;color:inherit}
:focus-visible{outline:2px solid var(--green);outline-offset:2px;border-radius:4px}
::selection{background:var(--lime);color:var(--ink)}

.container{width:100%;max-width:var(--maxw);margin:0 auto;padding:0 32px}
.section{padding:112px 0}
.section-head{display:flex;flex-wrap:wrap;align-items:flex-end;justify-content:space-between;gap:20px;margin-bottom:48px}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;font-size:12px;letter-spacing:.14em;
  font-family:var(--mono);color:var(--green);text-transform:uppercase;margin-bottom:12px;
}
.eyebrow::before{content:"";width:18px;height:2px;background:var(--green);display:block}
h2{font-size:clamp(28px,3.4vw,42px);line-height:1.16;font-weight:700;letter-spacing:-.01em}
h3{font-size:20px;line-height:1.4;font-weight:650}
.section-desc{color:var(--muted);font-size:15px;max-width:520px}
.dot{width:6px;height:6px;border-radius:50%;background:var(--green);display:inline-block;flex:0 0 auto}
.dot.pulse{animation:breathe 1.6s ease-in-out infinite}
@keyframes breathe{0%,100%{opacity:1}50%{opacity:.35}}

/* ---------- 按钮 ---------- */
.btn-primary,.btn-ghost,.btn-line,.arrow-btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;transition:all .2s cubic-bezier(.16,.84,.44,1)}
.btn-primary{
  background:var(--lime);color:var(--ink);border-radius:var(--r-pill);height:52px;padding:0 28px;
  font-weight:700;font-size:15px;border:1px solid var(--lime);
}
.btn-primary:hover{filter:brightness(.94);transform:translateY(-1px)}
.btn-primary:active{transform:scale(.985)}
.btn-ghost{
  background:transparent;color:var(--ink);border:1px solid var(--ink);border-radius:var(--r-pill);
  height:52px;padding:0 28px;font-weight:600;font-size:15px;
}
.btn-ghost:hover{background:var(--ink);color:#fff}
.btn-ghost:active{transform:scale(.985)}
.btn-line{
  background:transparent;color:var(--ink);border:1px solid var(--line);border-radius:var(--r-pill);
  height:44px;padding:0 22px;font-weight:600;font-size:14px;background:#fff;
}
.btn-line:hover{border-color:var(--ink);transform:translateY(-1px)}
.btn-lime{
  background:var(--lime);color:var(--ink);border-radius:var(--r-pill);padding:12px 18px;
  font-size:14px;font-weight:700;display:inline-flex;align-items:center;transition:all .2s;
}
.btn-lime:hover{filter:brightness(.94);transform:translateY(-1px)}

/* ---------- 徽章 ---------- */
.badge{
  display:inline-flex;align-items:center;gap:6px;border-radius:var(--r-pill);
  font-size:12px;line-height:1;padding:7px 12px;font-family:var(--mono);white-space:nowrap;
}
.badge-green{border:1px solid var(--green);color:var(--green);background:rgba(255,255,255,.9)}
.badge-soft{background:var(--green-soft);color:var(--green);border:1px solid rgba(15,169,122,.24)}
.badge-lime{border:1px solid var(--lime);color:var(--ink);background:rgba(214,242,74,.28)}

/* ---------- 导航 ---------- */
.site-header{
  position:fixed;top:0;left:0;right:0;z-index:120;
  background:rgba(247,246,242,.94);
  border-bottom:1px solid transparent;
  transition:background .24s ease,border-color .24s ease,box-shadow .24s ease;
}
.site-header.scrolled{background:rgba(255,255,255,.96);border-bottom-color:var(--line);box-shadow:0 6px 20px -18px rgba(16,19,25,.5)}
.nav-inner{
  max-width:var(--maxw);margin:0 auto;padding:0 32px;height:68px;
  display:flex;align-items:center;gap:24px;transition:height .24s ease;
}
.site-header.scrolled .nav-inner{height:60px}
.brand{display:flex;align-items:center;gap:10px;flex:0 0 auto;color:var(--ink)}
.brand-mark{color:var(--ink);display:flex;transition:color .2s}
.brand:hover .brand-mark{color:var(--green)}
.brand-text{font-size:16px;font-weight:700;letter-spacing:-.01em;white-space:nowrap}
.nav-links{display:flex;align-items:center;gap:28px;margin-left:12px}
.nav-links a{position:relative;font-size:15px;color:var(--ink-2);padding:6px 0;white-space:nowrap}
.nav-links a::after{
  content:"";position:absolute;left:0;bottom:0;height:2px;width:0;background:var(--green);
  transition:width .18s cubic-bezier(.16,.84,.44,1);
}
.nav-links a:hover::after{width:20px}
.nav-links a.active{color:var(--ink);font-weight:650}
.nav-links a.active::after{width:20px}
.nav-actions{margin-left:auto;display:flex;align-items:center;gap:14px}
.search{position:relative;display:flex;align-items:center}
.search svg{position:absolute;left:12px;color:var(--muted);pointer-events:none}
.search input{
  width:200px;height:40px;border-radius:var(--r-pill);border:1px solid var(--line);
  background:#fff;padding:0 14px 0 36px;font-size:14px;transition:width .24s ease,border-color .2s;
}
.search input::placeholder{color:#96A0AB}
.search input:focus{width:280px;border-color:var(--green);outline:none;box-shadow:0 0 0 3px rgba(15,169,122,.16)}
.link-login{font-size:15px;color:var(--ink-2);padding:8px 4px}
.link-login:hover{color:var(--green)}
.burger{display:none;width:44px;height:44px;border-radius:12px;align-items:center;justify-content:center;border:1px solid var(--line);background:#fff}
.burger span{display:block;width:18px;height:2px;background:var(--ink);position:relative;border-radius:2px}
.burger span::before,.burger span::after{content:"";position:absolute;left:0;width:18px;height:2px;background:var(--ink);border-radius:2px}
.burger span::before{top:-6px}
.burger span::after{top:6px}

.drawer{
  position:fixed;top:0;right:0;bottom:0;width:82vw;max-width:340px;background:#fff;z-index:220;
  transform:translateX(102%);transition:transform .28s cubic-bezier(.16,.84,.44,1);
  padding:22px 20px 32px;overflow-y:auto;box-shadow:-24px 0 60px -30px rgba(16,19,25,.4);
}
.drawer.open{transform:translateX(0)}
.drawer-mask{
  position:fixed;inset:0;background:rgba(16,19,25,.32);z-index:210;opacity:0;pointer-events:none;
  transition:opacity .28s ease;
}
.drawer-mask.open{opacity:1;pointer-events:auto}
.drawer-top{display:flex;align-items:center;justify-content:space-between;margin-bottom:22px}
.drawer-close{width:40px;height:40px;border-radius:12px;border:1px solid var(--line);display:flex;align-items:center;justify-content:center;font-size:18px}
.drawer nav{display:flex;flex-direction:column;gap:2px;margin-bottom:22px}
.drawer nav a{padding:14px 4px;font-size:16px;font-weight:600;border-bottom:1px solid var(--line)}
.drawer nav a.active{color:var(--green)}
.drawer .search{width:100%;margin-bottom:18px}
.drawer .search input{width:100%}
.drawer .search input:focus{width:100%}
.drawer-foot{margin-top:26px;padding-top:18px;border-top:1px solid var(--line);font-size:13px;color:var(--muted);font-family:var(--mono)}

/* ---------- Hero ---------- */
.hero{padding:132px 0 96px;position:relative;overflow:hidden}
.hero::before{
  content:"";position:absolute;inset:0;pointer-events:none;opacity:.9;
  background-image:linear-gradient(rgba(16,19,25,.035) 1px,transparent 1px),linear-gradient(90deg,rgba(16,19,25,.035) 1px,transparent 1px);
  background-size:8px 8px;
  mask-image:radial-gradient(ellipse 70% 60% at 70% 20%,#000 0%,transparent 72%);
  -webkit-mask-image:radial-gradient(ellipse 70% 60% at 70% 20%,#000 0%,transparent 72%);
}
.hero-grid{position:relative;display:grid;grid-template-columns:6fr 6fr;gap:56px;align-items:center;min-height:560px}
.hero-copy{padding-right:40px}
.hero-copy h1{
  font-size:clamp(40px,6.2vw,76px);line-height:1.06;letter-spacing:-.02em;font-weight:800;
  margin:22px 0 18px;
}
.hero-sub{font-size:19px;color:var(--ink-2);line-height:1.7;max-width:26ch}
.hero-cta{display:flex;flex-wrap:wrap;gap:14px;margin:32px 0 26px}
.trust{display:flex;flex-wrap:wrap;gap:26px;padding-top:20px;border-top:1px solid var(--line)}
.trust li{display:flex;align-items:center;gap:8px;font-size:13px;font-family:var(--mono);color:var(--muted)}
.hero-visual{position:relative}
.hero-visual::after{
  content:"";position:absolute;inset:0;transform:translate(12px,12px);border-radius:var(--r-img);z-index:0;
  background-image:linear-gradient(rgba(15,169,122,.14) 1px,transparent 1px),linear-gradient(90deg,rgba(15,169,122,.14) 1px,transparent 1px);
  background-size:8px 8px;
}
.hero-frame{position:relative;z-index:1;border-radius:var(--r-img);overflow:hidden;border:1px solid var(--line);background:#fff;box-shadow:var(--sh-1)}
.hero-frame img{width:100%;height:100%;aspect-ratio:4/3;object-fit:cover}
.float-badge{
  position:absolute;left:16px;bottom:16px;z-index:2;display:inline-flex;align-items:center;gap:8px;
  background:#fff;border-radius:var(--r-pill);padding:8px 14px;font-size:13px;font-weight:600;
  box-shadow:var(--sh-1);border:1px solid var(--line);
}

/* ---------- 价值区 ---------- */
.value-grid{display:grid;grid-template-columns:5fr 7fr;gap:64px;align-items:start}
.value-head h2{margin-bottom:14px}
.value-head p{color:var(--muted);font-size:15px;max-width:30ch}
.value-rows{border-top:1px solid var(--line)}
.value-row{
  position:relative;display:flex;gap:18px;padding:26px 20px 26px 22px;border-bottom:1px solid var(--line);
  transition:background .2s ease;
}
.value-row::before{
  content:"";position:absolute;left:0;top:24px;bottom:24px;width:3px;background:var(--green);
  transform:scaleY(0);transform-origin:top;transition:transform .24s cubic-bezier(.16,.84,.44,1);
}
.value-row:hover{background:var(--paper)}
.value-row:hover::before{transform:scaleY(1)}
.value-ico{
  flex:0 0 auto;width:40px;height:40px;border-radius:12px;border:1px solid var(--line);background:#fff;
  display:flex;align-items:center;justify-content:center;color:var(--green);
}
.value-row h3{font-size:17px;margin-bottom:4px}
.value-row p{font-size:14px;color:var(--muted);line-height:1.75;max-width:52ch}

/* ---------- 截图轮播 ---------- */
.shots-track{
  display:flex;gap:24px;overflow-x:auto;scroll-snap-type:x mandatory;padding:4px 4px 22px;
  scrollbar-width:none;
}
.shots-track::-webkit-scrollbar{display:none}
.shot{
  flex:0 0 calc((100% - 48px) / 2.5);scroll-snap-align:start;background:#fff;border:1px solid var(--line);
  border-radius:var(--r-card);box-shadow:var(--sh-1);overflow:hidden;transition:transform .24s ease,box-shadow .24s ease;
}
.shot:hover{transform:translateY(-3px);box-shadow:var(--sh-2)}
.shot-media{aspect-ratio:16/10;overflow:hidden;border-bottom:1px solid var(--line)}
.shot-media img{width:100%;height:100%;object-fit:cover;transition:transform .24s ease-out}
.shot:hover .shot-media img{transform:scale(1.03)}
.shot-body{padding:20px 22px 24px}
.shot-body h3{font-size:16px;font-weight:700;margin-bottom:6px}
.shot-body p{font-size:14px;color:var(--muted);line-height:1.7}
.shots-ctrl{display:flex;align-items:center;gap:18px;margin-top:8px}
.arrow-btn{
  width:36px;height:36px;border-radius:50%;border:1px solid var(--ink);background:transparent;
  font-size:15px;color:var(--ink);flex:0 0 auto;
}
.arrow-btn:hover{background:var(--ink);color:#fff}
.progress{flex:1;height:3px;background:var(--line);border-radius:999px;overflow:hidden}
.progress span{display:block;height:100%;width:20%;background:var(--lime);border-radius:999px;transition:width .2s ease}

/* ---------- 系统要求 ---------- */
.spec-wrap{background:#fff;border:1px solid var(--line);border-radius:var(--r-card);box-shadow:var(--sh-1);overflow:hidden}
.spec-row{
  position:relative;display:grid;grid-template-columns:1.2fr 1fr 1fr;gap:20px;align-items:center;
  min-height:56px;padding:10px 24px;border-bottom:1px solid var(--line);transition:background .18s ease;
}
.spec-row:last-child{border-bottom:0}
.spec-row:nth-child(even){background:var(--paper)}
.spec-row:hover::before{transform:scaleY(1)}
.spec-row::before{
  content:"";position:absolute;left:0;top:8px;bottom:8px;width:3px;background:var(--green);
  transform:scaleY(0);transform-origin:center;transition:transform .2s ease;
}
.spec-head{background:var(--ink) !important;color:#fff;font-family:var(--mono);font-size:13px;letter-spacing:.06em}
.spec-head::before{display:none}
.spec-name{font-size:15px;color:var(--ink-2);font-weight:600}
.spec-val{font-family:var(--mono);font-size:14px;color:var(--ink-2)}
.spec-note{display:flex;align-items:center;gap:8px;font-size:13px;color:var(--muted);margin-top:16px}

/* ---------- 评价墙 ---------- */
.reviews{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.rev-col{display:flex;flex-direction:column;gap:24px}
.rev-col:nth-child(1){margin-top:32px}
.rev-col:nth-child(2){margin-top:0}
.rev-col:nth-child(3){margin-top:64px}
.rev-card{
  background:#fff;border:1px solid var(--line);border-radius:var(--r-card);padding:22px;box-shadow:var(--sh-1);
  transition:transform .24s ease,box-shadow .24s ease;
}
.rev-card:hover{transform:translateY(-3px);box-shadow:var(--sh-2)}
.rev-top{display:flex;align-items:center;gap:12px;margin-bottom:14px}
.avatar{
  width:32px;height:32px;border-radius:50%;flex:0 0 auto;
  background:linear-gradient(140deg,rgba(15,169,122,.32),rgba(15,169,122,.12));
  display:flex;align-items:center;justify-content:center;font-family:var(--mono);font-size:12px;color:var(--green);font-weight:700;
}
.rev-name{font-size:14px;font-weight:650}
.rev-card p{font-size:14px;line-height:1.7;color:var(--ink-2)}
.rev-date{display:block;text-align:right;font-family:var(--mono);font-size:12px;color:var(--muted);margin-top:14px}

/* ---------- 最新信息 ---------- */
.news-grid{display:grid;grid-template-columns:6fr 5fr;gap:32px;align-items:start}
.news-lead{
  display:block;background:#fff;border:1px solid var(--line);border-radius:var(--r-card);
  overflow:hidden;box-shadow:var(--sh-1);transition:transform .24s ease,box-shadow .24s ease;
}
.news-lead:hover{transform:translateY(-3px);box-shadow:var(--sh-2)}
.news-lead-media{position:relative;aspect-ratio:16/9;overflow:hidden}
.news-lead-media img{width:100%;height:100%;object-fit:cover;transition:transform .24s ease-out}
.news-lead:hover .news-lead-media img{transform:scale(1.03)}
.news-lead-media .badge{position:absolute;left:16px;top:16px}
.news-lead h3{font-size:22px;font-weight:700;padding:24px 26px 8px;line-height:1.35}
.news-lead p{padding:0 26px;font-size:15px;color:var(--muted);line-height:1.8;
  display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden;}
.news-lead .meta{display:block;padding:16px 26px 24px;font-family:var(--mono);font-size:12px;color:var(--muted)}
.news-list{border-top:1px solid var(--line)}
.news-list li{border-bottom:1px solid var(--line)}
.news-list a{
  position:relative;display:block;padding:20px 34px 20px 16px;transition:background .18s ease;
}
.news-list a::before{
  content:"";position:absolute;left:0;top:16px;bottom:16px;width:3px;background:var(--green);
  transform:scaleY(0);transform-origin:top;transition:transform .22s cubic-bezier(.16,.84,.44,1);
}
.news-list a:hover{background:var(--paper)}
.news-list a:hover::before{transform:scaleY(1)}
.news-list h3{font-size:16px;font-weight:650;line-height:1.5;margin:8px 0 6px;transition:color .18s}
.news-list a:hover h3{color:var(--green)}
.news-list p{font-size:13px;color:var(--muted);line-height:1.7;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;}
.news-list .meta{display:block;font-family:var(--mono);font-size:12px;color:#96A0AB;margin-top:8px}
.news-list .arrow{
  position:absolute;right:10px;top:50%;transform:translateY(-50%);color:var(--muted);
  transition:transform .2s ease,color .2s ease;
}
.news-list a:hover .arrow{transform:translate(4px,-50%);color:var(--green)}
.tag{font-size:12px;font-family:var(--mono);color:var(--green)}
.empty-state{
  border:1px dashed var(--line);border-radius:var(--r-card);background:#fff;
  padding:56px 24px;text-align:center;color:var(--muted);
}
.empty-state svg{color:var(--line);margin:0 auto 14px}
.empty-state p{font-size:14px}

/* ---------- 下载 CTA ---------- */
.download{background:var(--dark);color:#fff;position:relative;overflow:hidden}
.download::before{
  content:"";position:absolute;inset:0;
  background-image:linear-gradient(rgba(255,255,255,.07) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.07) 1px,transparent 1px);
  background-size:8px 8px;opacity:.45;
}
.download .container{position:relative}
.download h2{color:#fff}
.download .section-desc{color:#9AA2AD}
.dl-grid{display:grid;grid-template-columns:1fr 200px;gap:56px;align-items:center}
.dl-btns{display:flex;flex-wrap:wrap;gap:14px;margin-top:32px}
.dl-btn{
  display:flex;flex-direction:column;gap:4px;border-radius:var(--r-pill);padding:12px 26px;
  border:1px solid rgba(255,255,255,.18);color:#fff;transition:all .2s ease;min-width:190px;
}
.dl-btn:hover{background:rgba(255,255,255,.08);transform:translateY(-1px)}
.dl-btn strong{font-size:15px;font-weight:700}
.dl-btn span{font-family:var(--mono);font-size:12px;color:#9AA2AD}
.dl-btn.primary{background:var(--lime);border-color:var(--lime);color:var(--ink)}
.dl-btn.primary span{color:rgba(16,19,25,.6)}
.dl-btn.primary:hover{filter:brightness(.94);background:var(--lime)}
.qr{
  width:120px;height:120px;background:#fff;border-radius:var(--r-img);display:flex;align-items:center;
  justify-content:center;margin:0 auto 12px;color:var(--ink);
}
.qr-cap{font-size:13px;color:#9AA2AD;text-align:center;font-family:var(--mono)}
.dl-check{margin-top:34px;font-family:var(--mono);font-size:13px;color:#9AA2AD;border-top:1px solid rgba(255,255,255,.12);padding-top:18px}

/* ---------- FAQ ---------- */
.faq-grid{display:grid;grid-template-columns:5fr 7fr;gap:64px;align-items:start}
.faq-side{position:sticky;top:100px}
.faq-side h2{margin-bottom:14px}
.faq-side p{color:var(--muted);font-size:15px;max-width:28ch;margin-bottom:22px}
.faq-list{border-top:1px solid var(--line)}
.faq-item{border-bottom:1px solid var(--line)}
.faq-q{
  width:100%;display:flex;align-items:center;justify-content:space-between;gap:18px;text-align:left;
  padding:22px 4px;font-size:16px;font-weight:650;color:var(--ink);transition:color .18s;
}
.faq-q:hover{color:var(--green)}
.faq-sign{
  flex:0 0 auto;width:24px;height:24px;border-radius:50%;border:1px solid var(--line);position:relative;
  transition:transform .18s ease,border-color .18s;
}
.faq-sign::before,.faq-sign::after{content:"";position:absolute;left:6px;right:6px;top:11px;height:1.5px;background:var(--ink)}
.faq-sign::after{transform:rotate(90deg);transition:transform .18s ease}
.faq-item.open .faq-sign::after{transform:rotate(0deg)}
.faq-item.open .faq-q{color:var(--green)}
.faq-item.open .faq-sign{border-color:var(--green)}
.faq-a{max-height:0;overflow:hidden;transition:max-height .28s ease}
.faq-a p{padding:0 4px 24px;font-size:15px;line-height:1.8;color:var(--ink-2);max-width:62ch}

/* ---------- 页脚 ---------- */
.site-footer{background:var(--ink);color:#fff;padding:76px 0 0}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:40px;padding-bottom:56px}
.footer-brand{display:flex;align-items:center;gap:10px;margin-bottom:16px}
.footer-brand .brand-mark{color:#fff}
.footer-brand span{font-size:16px;font-weight:700}
.footer-about{font-size:14px;color:rgba(255,255,255,.72);line-height:1.8;max-width:30ch}
.footer-col h4{font-size:13px;color:#9AA2AD;letter-spacing:.12em;font-weight:600;margin-bottom:18px;font-family:var(--mono)}
.footer-col a,.footer-col p{display:block;font-size:14px;color:rgba(255,255,255,.78);margin-bottom:12px;transition:color .18s}
.footer-col a:hover{color:var(--lime)}
.footer-bottom{
  border-top:1px solid rgba(255,255,255,.1);padding:22px 0 30px;display:flex;flex-wrap:wrap;gap:14px;
  align-items:center;justify-content:space-between;font-size:13px;color:rgba(255,255,255,.5);font-family:var(--mono);
}

/* ---------- 动效 ---------- */
.reveal{opacity:0;transform:translateY(12px);transition:opacity .32s cubic-bezier(.16,.84,.44,1),transform .32s cubic-bezier(.16,.84,.44,1)}
.reveal.in{opacity:1;transform:none}

@media (prefers-reduced-motion:reduce){
  *{animation:none !important;transition-duration:.01ms !important}
  .reveal{transform:none;opacity:1}
  html{scroll-behavior:auto}
}

/* ---------- 响应式 ---------- */
@media (max-width:1279px){
  .nav-links{gap:20px}
  .search input{width:160px}
  .search input:focus{width:220px}
  .hero-grid{gap:40px}
}
@media (max-width:1023px){
  .nav-links{display:none}
  .burger{display:flex}
  .search{display:none}
  .hero-grid{grid-template-columns:1fr;gap:40px}
  .hero-copy{padding-right:0}
  .hero{padding:112px 0 72px}
  .hero-visual{max-width:640px}
  .value-grid,.faq-grid,.news-grid,.dl-grid{grid-template-columns:1fr;gap:36px}
  .faq-side{position:static}
  .reviews{grid-template-columns:repeat(2,1fr)}
  .rev-col:nth-child(1),.rev-col:nth-child(3){margin-top:0}
  .rev-col:nth-child(2){margin-top:32px}
  .shot{flex:0 0 calc((100% - 24px) / 2)}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px}
}
@media (max-width:767px){
  .container{padding:0 18px}
  .section{padding:64px 0}
  .nav-inner{padding:0 18px;height:60px;gap:12px}
  .link-login{display:none}
  .hero{padding:96px 0 56px}
  .hero-copy h1{margin:18px 0 14px}
  .hero-cta{gap:12px}
  .hero-cta .btn-primary,.hero-cta .btn-ghost{width:100%}
  .trust{gap:16px}
  .shot{flex:0 0 82vw}
  .reviews{display:flex;overflow-x:auto;scroll-snap-type:x mandatory;gap:16px;padding-bottom:12px}
  .rev-col{flex:0 0 82vw;scroll-snap-align:start;margin-top:0 !important;gap:16px}
  .spec-row{grid-template-columns:1fr;gap:2px;padding:14px 18px;min-height:0}
  .spec-row .spec-val{font-size:13px}
  .spec-head{display:none}
  .news-list a{padding-right:28px}
  .footer-grid{grid-template-columns:1fr;gap:24px;padding-bottom:36px}
  .site-footer{padding-top:56px}
}
@media (max-width:419px){
  .brand-text{font-size:13px;line-height:1.25;white-space:normal;max-width:112px}
  .trust li:nth-child(3){display:none}
  .dl-btn{width:100%;min-width:0}
}

/* roulang page: article */
:root{
  --ink:#101319;
  --ink-2:#2B3038;
  --green:#0FA97A;
  --lime:#D6F24A;
  --paper:#F7F6F2;
  --card:#FFFFFF;
  --line:#E3E1DB;
  --muted:#5C646F;
  --dark:#0D0F12;
  --warn:#F2A93B;
  --danger:#E2544A;
  --r-card:16px;
  --r-img:12px;
  --r-pill:999px;
  --sh1:0 1px 2px rgba(16,19,25,.04),0 8px 24px -12px rgba(16,19,25,.14);
  --sh2:0 2px 4px rgba(16,19,25,.06),0 18px 40px -16px rgba(16,19,25,.22);
  --sans:system-ui,-apple-system,"PingFang SC","HarmonyOS Sans SC","Source Han Sans SC","Microsoft YaHei",sans-serif;
  --mono:ui-monospace,"SF Mono",Menlo,Consolas,monospace;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;background:var(--paper);color:var(--ink);
  font-family:var(--sans);font-size:16px;line-height:1.85;
  -webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility;
}
img{max-width:100%;display:block;object-fit:cover}
a{color:inherit;text-decoration:none}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer}
input{font:inherit}
h1,h2,h3,h4{margin:0}
p{margin:0}
:focus-visible{outline:2px solid var(--green);outline-offset:2px;border-radius:4px}
.container{max-width:1200px;margin:0 auto;padding:0 32px}
.skip{position:absolute;left:-9999px;top:0;background:var(--ink);color:#fff;padding:10px 16px;border-radius:0 0 12px 0;z-index:200}
.skip:focus{left:0}

/* ============ 导航 ============ */
.site-header{
  position:sticky;top:0;z-index:60;
  background:rgba(247,246,242,.94);
  border-bottom:1px solid transparent;
  transition:border-color .24s ease,background .24s ease;
}
.site-header.is-scrolled{border-bottom-color:var(--line)}
.nav-inner{
  max-width:1280px;margin:0 auto;padding:0 32px;height:68px;
  display:flex;align-items:center;gap:24px;
  transition:height .24s ease;
}
.site-header.is-scrolled .nav-inner{height:60px}
.brand{display:flex;align-items:center;gap:10px;flex:none}
.brand-mark{display:inline-flex;color:var(--ink);transition:color .2s ease}
.brand:hover .brand-mark{color:var(--green)}
.brand-text{font-size:16px;font-weight:700;letter-spacing:-.01em;white-space:nowrap}
.nav-links{display:flex;align-items:center;gap:28px;margin-left:12px}
.nav-links a{position:relative;font-size:15px;color:var(--ink-2);padding:6px 0;transition:color .2s ease}
.nav-links a::after{
  content:"";position:absolute;left:0;bottom:0;height:2px;width:0;
  background:var(--green);transition:width .18s ease;
}
.nav-links a:hover{color:var(--ink)}
.nav-links a:hover::after{width:20px}
.nav-links a.active{color:var(--ink);font-weight:600}
.nav-links a.active::after{width:20px}
.nav-actions{margin-left:auto;display:flex;align-items:center;gap:14px}
.search{
  display:flex;align-items:center;gap:8px;width:200px;height:40px;
  padding:0 14px;background:var(--card);border:1px solid var(--line);
  border-radius:var(--r-pill);transition:width .24s ease,border-color .2s ease;
}
.search:focus-within{width:280px;border-color:var(--green)}
.search svg{color:var(--muted);flex:none}
.search input{border:0;outline:0;background:transparent;width:100%;font-size:14px;color:var(--ink)}
.search input::placeholder{color:#98A0AA}
.link-login{font-size:15px;color:var(--ink-2);padding:8px 4px;transition:color .2s ease}
.link-login:hover{color:var(--green)}
.btn-lime{
  display:inline-flex;align-items:center;justify-content:center;
  height:40px;padding:0 18px;border-radius:var(--r-pill);
  background:var(--lime);color:var(--ink);font-size:14px;font-weight:700;
  transition:transform .18s ease,filter .18s ease;
}
.btn-lime:hover{filter:brightness(.94);transform:translateY(-1px)}
.btn-lime:active{transform:scale(.985)}
.burger{
  display:none;width:44px;height:44px;align-items:center;justify-content:center;
  border-radius:12px;border:1px solid var(--line);background:var(--card);
}
.burger span{display:block;width:16px;height:1.6px;background:var(--ink);position:relative}
.burger span::before,.burger span::after{content:"";position:absolute;left:0;width:16px;height:1.6px;background:var(--ink)}
.burger span::before{top:-5px}
.burger span::after{top:5px}

/* 抽屉 */
.drawer{position:fixed;inset:0;z-index:140;background:rgba(16,19,25,.42);opacity:0;visibility:hidden;transition:opacity .28s ease,visibility .28s ease}
.drawer.open{opacity:1;visibility:visible}
.drawer-panel{
  position:absolute;top:0;right:0;height:100%;width:280px;max-width:86vw;
  background:var(--paper);border-left:1px solid var(--line);
  padding:22px 20px;display:flex;flex-direction:column;gap:16px;
  transform:translateX(100%);transition:transform .28s ease;
}
.drawer.open .drawer-panel{transform:none}
.drawer-head{display:flex;align-items:center;justify-content:space-between;gap:12px}
.drawer-head .brand-text{font-size:15px}
.drawer-close{width:38px;height:38px;border-radius:12px;border:1px solid var(--line);background:var(--card);font-size:18px;line-height:1;color:var(--ink-2)}
.drawer-links{display:flex;flex-direction:column;gap:2px;border-top:1px solid var(--line);border-bottom:1px solid var(--line);padding:10px 0}
.drawer-links a{padding:11px 4px;font-size:15px;color:var(--ink-2);border-radius:10px}
.drawer-links a.active{color:var(--green);font-weight:600}
.drawer-search{width:100%}
.drawer-search:focus-within{width:100%}
.drawer-cta{width:100%;height:46px}
.drawer-foot{font-size:12.5px;color:var(--muted);margin-top:auto;line-height:1.7}

/* ============ 通用组件 ============ */
.badge{
  display:inline-flex;align-items:center;gap:6px;
  padding:4px 12px;border-radius:var(--r-pill);
  font-size:12px;font-weight:600;letter-spacing:.02em;
  border:1px solid rgba(15,169,122,.4);color:var(--green);background:rgba(15,169,122,.07);
}
.badge-soft{border-color:var(--line);color:var(--ink-2);background:var(--card)}
.dot{width:6px;height:6px;border-radius:50%;background:var(--green);display:inline-block;animation:breathe 1.6s ease-in-out infinite}
@keyframes breathe{0%,100%{opacity:1}50%{opacity:.35}}
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:46px;padding:0 22px;border-radius:var(--r-pill);
  font-size:15px;font-weight:650;transition:transform .18s ease,filter .18s ease,background .18s ease,color .18s ease,border-color .18s ease;
}
.btn-primary{background:var(--lime);color:var(--ink)}
.btn-primary:hover{filter:brightness(.94);transform:translateY(-1px)}
.btn-primary:active{transform:scale(.985)}
.btn-ghost{border:1px solid var(--ink);color:var(--ink);background:transparent}
.btn-ghost:hover{background:var(--ink);color:#fff}
.section{padding:96px 0}
.section-head{max-width:760px}
.section-head h2{font-size:clamp(28px,3.4vw,42px);line-height:1.16;font-weight:700;letter-spacing:-.02em}
.section-head p{margin-top:14px;font-size:16px;color:var(--muted);line-height:1.8}
.reveal{opacity:0;transform:translateY(12px);transition:opacity .32s cubic-bezier(.16,.84,.44,1),transform .32s cubic-bezier(.16,.84,.44,1)}
.reveal.in{opacity:1;transform:none}

/* ============ 文章头部 ============ */
.article-hero{padding:44px 0 28px}
.crumbs{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:14px;color:var(--muted);line-height:1.6}
.crumbs a{transition:color .2s ease}
.crumbs a:hover{color:var(--green)}
.crumbs .sep{color:#C7C5BF}
.crumbs .current{color:var(--muted)}
.article-title{
  margin:18px 0 0;max-width:820px;
  font-size:clamp(30px,4vw,46px);line-height:1.2;font-weight:800;letter-spacing:-.02em;
}
.article-meta{
  display:flex;flex-wrap:wrap;align-items:center;gap:14px;
  margin-top:20px;padding-top:18px;border-top:1px solid var(--line);
  font-family:var(--mono);font-size:13px;color:var(--muted);
}
.article-meta span{display:inline-flex;align-items:center;gap:6px}
.article-meta span+span{padding-left:14px;border-left:1px solid var(--line)}

/* ============ 文章布局 ============ */
.article-layout{
  display:grid;grid-template-columns:minmax(0,760px) 220px;
  justify-content:space-between;gap:64px;
  padding-bottom:72px;
}
.article-main{min-width:0}
.prose{font-size:16.5px;line-height:1.9;color:#1B2027}
.prose p{margin:0 0 18px}
.prose h2{
  position:relative;margin:48px 0 16px;padding-left:14px;
  font-size:clamp(22px,2.4vw,28px);line-height:1.32;font-weight:700;letter-spacing:-.01em;
  scroll-margin-top:96px;
}
.prose h2::before{
  content:"";position:absolute;left:0;top:.2em;bottom:.2em;width:4px;
  background:var(--green);border-radius:2px;
}
.prose h3{margin:32px 0 12px;font-size:20px;font-weight:650;line-height:1.4}
.prose ul{margin:0 0 18px;padding:0;list-style:none}
.prose ul li{position:relative;padding-left:20px;margin-bottom:8px}
.prose ul li::before{
  content:"";position:absolute;left:0;top:.72em;width:7px;height:7px;
  background:var(--green);border-radius:2px;
}
.prose ol{margin:0 0 18px;padding-left:22px}
.prose ol li{margin-bottom:8px}
.prose blockquote{
  margin:24px 0;padding:20px;background:var(--paper);
  border-left:3px solid var(--green);border-radius:0 12px 12px 0;color:var(--ink-2);
}
.prose blockquote p:last-child{margin-bottom:0}
.prose img{border-radius:var(--r-img);margin:24px auto}
.prose figure{margin:24px 0}
.prose figcaption{margin-top:10px;text-align:center;font-size:13px;color:var(--muted)}
.prose table{width:100%;border-collapse:collapse;margin:24px 0;font-size:15px}
.prose th,.prose td{border:1px solid var(--line);padding:12px 14px;text-align:left;vertical-align:top}
.prose th{background:var(--paper);font-weight:650}
.prose code{
  font-family:var(--mono);font-size:14px;background:var(--paper);
  border:1px solid var(--line);border-radius:6px;padding:1px 6px;
}
.prose pre{background:var(--dark);color:#E8EAEE;padding:20px;border-radius:var(--r-img);overflow:auto;font-family:var(--mono);font-size:14px}
.prose pre code{background:none;border:0;color:inherit;padding:0}
.prose a{color:var(--green);text-decoration:underline;text-underline-offset:3px}
.prose hr{border:0;border-top:1px solid var(--line);margin:32px 0}

/* 侧栏目录 */
.toc{position:sticky;top:100px;align-self:start;font-size:14px}
.toc-title{font-family:var(--mono);font-size:12px;letter-spacing:.08em;color:var(--muted);margin-bottom:14px;text-transform:uppercase}
.toc ol{list-style:none;margin:0;padding:0;border-left:1px solid var(--line)}
.toc li{margin:0}
.toc a{
  display:block;padding:6px 0 6px 14px;margin-left:-1px;
  border-left:2px solid transparent;color:var(--muted);line-height:1.6;
  transition:color .2s ease,border-color .2s ease;
}
.toc a:hover{color:var(--ink)}
.toc a.active{color:var(--green);border-left-color:var(--green);font-weight:600}
.toc-mobile{display:none;margin-bottom:28px;border:1px solid var(--line);border-radius:var(--r-img);background:var(--card)}
.toc-mobile summary{padding:14px 16px;font-size:15px;font-weight:600;cursor:pointer;list-style:none}
.toc-mobile summary::-webkit-details-marker{display:none}
.toc-mobile ol{margin:0;padding:0 16px 16px;list-style:none;border-top:1px solid var(--line)}
.toc-mobile li{padding:6px 0}
.toc-mobile a{color:var(--ink-2);font-size:14.5px}
.toc-mobile a:hover{color:var(--green)}

/* 空态 */
.empty-state{
  padding:48px 24px;text-align:center;background:var(--card);
  border:1px solid var(--line);border-radius:var(--r-card);
}
.empty-state svg{color:#C7C5BF;margin:0 auto 16px}
.empty-state p{font-size:15px;color:var(--muted);margin-bottom:20px}

/* 标签 / 分享 */
.tags{display:flex;flex-wrap:wrap;gap:10px;margin-top:48px;padding-top:28px;border-top:1px solid var(--line)}
.tag{
  padding:5px 14px;border-radius:var(--r-pill);border:1px solid var(--line);
  background:var(--card);font-size:13px;color:var(--ink-2);
  transition:border-color .2s ease,color .2s ease;
}
.tag:hover{border-color:var(--green);color:var(--green)}
.share{display:flex;flex-wrap:wrap;align-items:center;gap:12px;margin-top:20px}
.share-label{font-size:13px;color:var(--muted);font-family:var(--mono)}
.share-btn{
  display:inline-flex;align-items:center;gap:8px;height:40px;padding:0 16px;
  border:1px solid var(--line);border-radius:var(--r-pill);background:var(--card);
  font-size:14px;color:var(--ink-2);transition:border-color .2s ease,color .2s ease,transform .2s ease;
}
.share-btn:hover{border-color:var(--ink);color:var(--ink);transform:translateY(-1px)}

/* 上下篇 */
.post-nav{display:grid;grid-template-columns:1fr 1fr;gap:20px;margin-top:40px}
.post-card{
  display:block;padding:22px;background:var(--card);border:1px solid var(--line);
  border-radius:var(--r-card);box-shadow:var(--sh1);
  transition:transform .24s ease,box-shadow .24s ease,border-color .24s ease;
}
.post-card:hover{transform:translateY(-3px);box-shadow:var(--sh2);border-color:#D7D5CE}
.post-card .k{font-family:var(--mono);font-size:12px;color:var(--muted);letter-spacing:.06em}
.post-card .t{margin-top:10px;font-size:16px;font-weight:650;line-height:1.55}
.post-card .d{margin-top:8px;font-size:13.5px;color:var(--muted);line-height:1.7}
.post-card:hover .t{color:var(--green)}
.post-card.align-right{text-align:right}

/* 相关推荐 */
.related{padding:72px 0 0}
.related-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;margin-top:36px}
.card{
  display:flex;flex-direction:column;overflow:hidden;background:var(--card);
  border:1px solid var(--line);border-radius:var(--r-card);box-shadow:var(--sh1);
  transition:transform .24s ease,box-shadow .24s ease;
}
.card:hover{transform:translateY(-3px);box-shadow:var(--sh2)}
.card-media{position:relative;aspect-ratio:16/10;overflow:hidden;background:linear-gradient(135deg,rgba(15,169,122,.14),rgba(214,242,74,.16))}
.card-media img{width:100%;height:100%;transition:transform .28s ease-out}
.card:hover .card-media img{transform:scale(1.03)}
.card-media .badge{position:absolute;left:14px;top:14px;background:rgba(255,255,255,.94)}
.card-body{padding:20px 20px 22px;display:flex;flex-direction:column;gap:10px;flex:1}
.card-body h3{font-size:17px;font-weight:650;line-height:1.5}
.card-body p{font-size:14px;color:var(--muted);line-height:1.7}
.card-meta{display:flex;justify-content:space-between;align-items:center;gap:10px;margin-top:auto;font-family:var(--mono);font-size:12.5px;color:var(--muted);padding-top:12px;border-top:1px solid var(--line)}
.card-arrow{margin-left:auto;color:var(--muted);transition:transform .2s ease,color .2s ease}
.card:hover .card-arrow{transform:translateX(4px);color:var(--green)}

/* 返回 */
.back-row{display:flex;flex-wrap:wrap;gap:14px;padding:40px 0 96px}

/* ============ 页脚 ============ */
.site-footer{background:var(--ink);color:rgba(255,255,255,.78);padding:72px 0 0}
.footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1fr;gap:40px;padding-bottom:48px}
.footer-brand{display:flex;align-items:center;gap:10px;color:#fff;font-weight:700;font-size:16px;margin-bottom:14px}
.footer-brand .brand-mark{color:#fff}
.footer-about{font-size:14px;line-height:1.8;color:rgba(255,255,255,.6);max-width:290px}
.footer-col h4{font-size:13px;font-weight:600;letter-spacing:.08em;color:#9AA2AD;margin-bottom:16px}
.footer-col a,.footer-col p{display:block;font-size:14px;color:rgba(255,255,255,.78);margin-bottom:10px;transition:color .2s ease}
.footer-col a:hover{color:var(--lime)}
.footer-bottom{
  display:flex;flex-wrap:wrap;justify-content:space-between;gap:12px;
  border-top:1px solid rgba(255,255,255,.1);padding:20px 0;
  font-size:13px;color:#9AA2AD;font-family:var(--mono);
}

/* ============ 响应式 ============ */
@media (max-width:1279px){
  .nav-links{gap:20px}
  .article-layout{grid-template-columns:minmax(0,1fr);gap:0}
  .toc{display:none}
  .toc-mobile{display:block}
}
@media (max-width:1080px){
  .nav-links{display:none}
  .burger{display:inline-flex}
  .search{width:168px}
  .search:focus-within{width:220px}
}
@media (max-width:1023px){
  .container{padding:0 24px}
  .nav-inner{padding:0 24px;gap:16px}
  .section{padding:72px 0}
  .related-grid{grid-template-columns:repeat(2,1fr)}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px}
}
@media (max-width:767px){
  .container{padding:0 18px}
  .nav-inner{padding:0 18px;height:60px}
  .site-header.is-scrolled .nav-inner{height:56px}
  .brand-text{font-size:15px}
  .link-login{display:none}
  .btn-lime{height:38px;padding:0 15px;font-size:13.5px}
  .section{padding:56px 0}
  .article-hero{padding:32px 0 20px}
  .article-meta{gap:10px;font-size:12.5px}
  .article-meta span+span{padding-left:10px}
  .post-nav{grid-template-columns:1fr}
  .post-card.align-right{text-align:left}
  .related-grid{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr;gap:28px;padding-bottom:32px}
  .back-row{padding:32px 0 64px}
  .btn{height:48px;width:100%}
  .back-row .btn{width:auto}
}
@media (max-width:560px){
  .search{display:none}
}
@media (max-width:420px){
  .brand-text{white-space:normal;line-height:1.15;font-size:13px;max-width:118px}
  .article-title{font-size:26px}
  .article-meta span:nth-child(4){display:none}
}
@media (prefers-reduced-motion:reduce){
  *{animation-duration:.01ms!important;animation-iteration-count:1!important;transition-duration:.01ms!important}
  .reveal{opacity:1;transform:none}
  html{scroll-behavior:auto}
}

/* roulang page: category1 */
:root{
  --brand:#0FA97A;
  --brand-soft:rgba(15,169,122,.08);
  --brand-line:rgba(15,169,122,.28);
  --ink:#101319;
  --ink-2:#2B3038;
  --ink-3:#5C646F;
  --lime:#D6F24A;
  --bg:#F7F6F2;
  --card:#FFFFFF;
  --line:#E3E1DB;
  --dark:#0D0F12;
  --warn:#F2A93B;
  --err:#E2544A;
  --r-card:16px;
  --r-img:12px;
  --r-pill:999px;
  --sh-1:0 1px 2px rgba(16,19,25,.04),0 8px 24px -12px rgba(16,19,25,.14);
  --sh-2:0 2px 4px rgba(16,19,25,.06),0 18px 40px -16px rgba(16,19,25,.22);
  --font:system-ui,-apple-system,"PingFang SC","HarmonyOS Sans SC","Source Han Sans SC","Microsoft YaHei",sans-serif;
  --mono:ui-monospace,"SF Mono",Menlo,Consolas,monospace;
  --s1:4px;--s2:8px;--s3:12px;--s4:16px;--s5:24px;--s6:32px;--s7:48px;--s8:64px;--s9:96px;--s10:128px;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  font-family:var(--font);
  font-size:16px;
  line-height:1.85;
  color:var(--ink);
  background:var(--bg);
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;object-fit:cover}
a{color:inherit;text-decoration:none}
button,input{font-family:inherit;font-size:inherit;color:inherit}
button{background:none;border:0;cursor:pointer}
h1,h2,h3,h4,p,ul,ol,figure,blockquote{margin:0}
ul,ol{padding:0;list-style:none}
:focus-visible{outline:2px solid var(--brand);outline-offset:2px;border-radius:4px}
::selection{background:var(--lime);color:var(--ink)}

.container{width:100%;max-width:1200px;margin:0 auto;padding:0 32px}
@media (min-width:1440px){.container{max-width:1280px}}

/* ============ 导航 ============ */
.site-header{
  position:sticky;top:0;z-index:60;
  background:transparent;
  border-bottom:1px solid transparent;
  transition:background .24s ease,height .24s ease,border-color .24s ease;
}
.site-header.is-scrolled{
  background:rgba(247,246,242,.94);
  border-bottom-color:var(--line);
}
.nav-inner{
  max-width:1280px;margin:0 auto;
  height:68px;padding:0 32px;
  display:flex;align-items:center;gap:32px;
  transition:height .24s ease;
}
.site-header.is-scrolled .nav-inner{height:60px}
.brand{display:flex;align-items:center;gap:10px;flex-shrink:0}
.brand-mark{color:var(--ink);display:inline-flex;transition:color .2s ease}
.brand:hover .brand-mark{color:var(--brand)}
.brand-text{
  font-size:16px;font-weight:700;letter-spacing:-.01em;
  color:var(--ink);white-space:nowrap;
}
.nav-links{
  display:flex;align-items:center;gap:28px;
  margin-left:auto;
}
.nav-links a{
  position:relative;
  font-size:15px;color:var(--ink-2);
  padding:6px 0;
  transition:color .18s ease;
}
.nav-links a::after{
  content:"";position:absolute;left:0;bottom:0;
  width:20px;height:2px;background:var(--brand);
  transform:scaleX(0);transform-origin:left;
  transition:transform .18s ease;
}
.nav-links a:hover{color:var(--ink)}
.nav-links a:hover::after,.nav-links a.active::after{transform:scaleX(1)}
.nav-links a.active{color:var(--ink);font-weight:600}
.nav-actions{display:flex;align-items:center;gap:16px;margin-left:auto}
.nav-links + .nav-actions{margin-left:0}
.search{
  display:flex;align-items:center;gap:8px;
  width:200px;height:38px;padding:0 14px;
  border:1px solid var(--line);border-radius:var(--r-pill);
  background:var(--card);
  transition:width .24s ease,border-color .2s ease,box-shadow .2s ease;
}
.search svg{color:var(--ink-3);flex-shrink:0}
.search input{
  width:100%;border:0;background:transparent;outline:none;
  font-size:14px;
}
.search input::placeholder{color:#98A0AA}
.search:focus-within{width:280px;border-color:var(--brand);box-shadow:0 0 0 3px var(--brand-soft)}
.link-login{font-size:15px;color:var(--ink-2);transition:color .18s ease}
.link-login:hover{color:var(--brand)}
.btn-lime{
  display:inline-flex;align-items:center;justify-content:center;
  height:38px;padding:0 18px;border-radius:var(--r-pill);
  background:var(--lime);color:var(--ink);
  font-size:14px;font-weight:700;letter-spacing:.01em;
  transition:filter .18s ease,transform .18s ease;
}
.btn-lime:hover{filter:brightness(.94);transform:translateY(-1px)}
.btn-lime:active{transform:scale(.985)}
.burger{
  display:none;width:40px;height:40px;border-radius:var(--r-pill);
  align-items:center;justify-content:center;
}
.burger span{
  display:block;width:18px;height:2px;background:var(--ink);border-radius:2px;
  position:relative;
}
.burger span::before,.burger span::after{
  content:"";position:absolute;left:0;width:18px;height:2px;background:var(--ink);border-radius:2px;
}
.burger span::before{top:-6px}
.burger span::after{top:6px}

/* ============ 抽屉 ============ */
.drawer-mask{
  position:fixed;inset:0;background:rgba(16,19,25,.42);
  opacity:0;visibility:hidden;transition:opacity .24s ease,visibility .24s ease;z-index:80;
}
.drawer-mask.open{opacity:1;visibility:visible}
.drawer{
  position:fixed;top:0;right:0;height:100%;width:300px;max-width:86vw;
  background:var(--card);z-index:90;
  transform:translateX(100%);
  transition:transform .28s cubic-bezier(.16,.84,.44,1);
  display:flex;flex-direction:column;gap:24px;
  padding:24px;overflow-y:auto;
}
.drawer.open{transform:translateX(0)}
.drawer-head{display:flex;align-items:center;justify-content:space-between}
.drawer-head .brand-text{font-size:15px}
.drawer-close{
  width:34px;height:34px;border-radius:var(--r-pill);
  border:1px solid var(--line);font-size:18px;line-height:1;
  display:flex;align-items:center;justify-content:center;
  transition:background .18s ease,color .18s ease;
}
.drawer-close:hover{background:var(--ink);color:#fff}
.drawer .search{width:100%}
.drawer .search:focus-within{width:100%}
.drawer-links{display:flex;flex-direction:column}
.drawer-links a{
  padding:14px 0;font-size:15px;color:var(--ink-2);
  border-bottom:1px solid var(--line);
  display:flex;justify-content:space-between;align-items:center;
  transition:color .18s ease,padding-left .18s ease;
}
.drawer-links a:hover{color:var(--brand);padding-left:6px}
.drawer-links a.active{color:var(--ink);font-weight:700}
.drawer-foot{margin-top:auto;font-size:13px;color:var(--ink-3);line-height:2}

/* ============ 分类页 Hero ============ */
.cat-hero{
  padding:96px 0 40px;
  border-bottom:1px solid var(--line);
  position:relative;
  overflow:hidden;
}
.cat-hero::before{
  content:"";position:absolute;inset:0;
  background-image:linear-gradient(rgba(16,19,25,.04) 1px,transparent 1px),linear-gradient(90deg,rgba(16,19,25,.04) 1px,transparent 1px);
  background-size:8px 8px;
  opacity:.6;pointer-events:none;
}
.cat-hero .container{position:relative;z-index:1}
.badge{
  display:inline-flex;align-items:center;gap:8px;
  height:30px;padding:0 14px;border-radius:var(--r-pill);
  border:1px solid var(--brand-line);background:var(--brand-soft);
  color:#0B7F5C;font-size:12px;font-weight:600;letter-spacing:.02em;
}
.badge .dot{
  width:6px;height:6px;border-radius:50%;background:var(--brand);
  animation:breathe 1.6s ease-in-out infinite;
}
@keyframes breathe{0%,100%{opacity:1;transform:scale(1)}50%{opacity:.45;transform:scale(.82)}}
.cat-hero h1{
  margin-top:24px;
  font-size:clamp(34px,5vw,60px);
  line-height:1.1;font-weight:800;letter-spacing:-.02em;
  max-width:960px;
}
.cat-hero .lead{
  margin-top:20px;max-width:640px;
  font-size:17px;color:var(--ink-2);
}
.crumb{
  display:flex;align-items:center;gap:8px;flex-wrap:wrap;
  font-size:14px;color:var(--ink-3);margin-bottom:22px;
}
.crumb a{color:var(--ink-3);transition:color .18s ease}
.crumb a:hover{color:var(--brand)}
.crumb span.sep{color:#C4C1B8}
.crumb .now{color:var(--ink-3)}

/* ============ 主体布局 ============ */
.section{padding:96px 0}
.section.tight{padding:72px 0}
.sec-head{max-width:720px;margin-bottom:48px}
.sec-head h2{
  font-size:clamp(28px,3.4vw,42px);
  line-height:1.16;font-weight:700;letter-spacing:-.015em;
}
.sec-head p{margin-top:14px;color:var(--ink-3);font-size:16px}
.eyebrow{
  display:block;font-family:var(--mono);font-size:13px;
  letter-spacing:.08em;color:var(--brand);margin-bottom:14px;text-transform:uppercase;
}

.content-grid{display:grid;grid-template-columns:248px minmax(0,1fr);gap:56px;align-items:start}
.anchor-nav{position:sticky;top:104px}
.anchor-nav h2{
  font-size:13px;font-weight:600;letter-spacing:.08em;
  color:var(--ink-3);margin-bottom:14px;
}
.anchor-nav ul{display:flex;flex-direction:column}
.anchor-nav a{
  display:block;padding:10px 0 10px 14px;
  font-size:14px;color:var(--ink-2);
  border-left:1px solid var(--line);
  transition:color .18s ease,border-color .18s ease,padding-left .18s ease;
}
.anchor-nav a:hover{color:var(--brand);padding-left:18px}
.anchor-nav a.active{color:var(--brand);border-left-color:var(--brand);font-weight:600}
.anchor-note{
  margin-top:24px;padding:16px;border-radius:var(--r-img);
  background:var(--brand-soft);border:1px solid var(--brand-line);
  font-size:13px;line-height:1.8;color:var(--ink-2);
}

/* ============ 步骤卡 ============ */
.steps{border-top:1px solid var(--line)}
.step{
  position:relative;
  padding:34px 0;
  border-bottom:1px solid var(--line);
  scroll-margin-top:104px;
  transition:background .2s ease;
}
.step:hover{background:rgba(255,255,255,.6)}
.step::before{
  content:"";position:absolute;left:-18px;top:34px;bottom:34px;width:3px;
  background:var(--brand);border-radius:3px;
  transform:scaleY(0);transform-origin:top;
  transition:transform .22s cubic-bezier(.16,.84,.44,1);
}
.step:hover::before{transform:scaleY(1)}
.step-ghost{
  position:absolute;right:8px;top:18px;
  font-family:var(--mono);font-size:64px;font-weight:800;line-height:1;
  color:#E3E1DB;letter-spacing:-.03em;
  pointer-events:none;user-select:none;
}
.step-body{position:relative;z-index:1;padding-right:96px;max-width:760px}
.step-index{
  display:inline-block;font-family:var(--mono);font-size:20px;font-weight:700;
  color:var(--brand);line-height:1;letter-spacing:.01em;
}
.step h3{margin-top:14px;font-size:20px;font-weight:650;line-height:1.4}
.step p{margin-top:10px;font-size:16px;color:var(--ink-3);line-height:1.85}
.step-figure{
  margin-top:22px;border-radius:var(--r-img);overflow:hidden;
  border:1px solid var(--line);box-shadow:var(--sh-1);
}
.step-figure img{width:100%;aspect-ratio:16/9}
.step-list{margin-top:14px;display:flex;flex-direction:column;gap:8px}
.step-list li{
  position:relative;padding-left:20px;font-size:15px;color:var(--ink-2);
}
.step-list li::before{
  content:"";position:absolute;left:0;top:12px;
  width:7px;height:7px;border-radius:2px;background:var(--brand);
}

/* ============ 场景条目 ============ */
.scene-list{border-top:1px solid var(--line)}
.scene{
  display:grid;grid-template-columns:220px minmax(0,1fr);
  gap:32px;align-items:start;
  padding:28px 0;border-bottom:1px solid var(--line);
  position:relative;
  transition:background .2s ease;
}
.scene:hover{background:rgba(255,255,255,.7)}
.scene::before{
  content:"";position:absolute;left:-16px;top:28px;bottom:28px;width:3px;
  background:var(--brand);border-radius:3px;
  transform:scaleX(0);transform-origin:left;
  transition:transform .22s cubic-bezier(.16,.84,.44,1);
}
.scene:hover::before{transform:scaleX(1)}
.scene h3{font-size:18px;font-weight:650;display:flex;align-items:center;gap:10px}
.scene h3 .tag{
  font-family:var(--mono);font-size:12px;color:var(--brand);
  border:1px solid var(--brand-line);border-radius:var(--r-pill);
  padding:2px 10px;background:var(--brand-soft);
}
.scene p{font-size:15px;color:var(--ink-3)}

/* ============ 提示对照 ============ */
.prompt-panel{
  background:var(--card);border:1px solid var(--line);
  border-radius:var(--r-card);box-shadow:var(--sh-1);
  padding:8px 32px;
}
.prompt-row{
  display:grid;grid-template-columns:minmax(180px,260px) minmax(0,1fr);
  gap:28px;padding:22px 0;border-bottom:1px solid var(--line);
  position:relative;
}
.prompt-row:last-child{border-bottom:0}
.prompt-row::before{
  content:"";position:absolute;left:-20px;top:22px;bottom:22px;width:3px;
  background:var(--brand);border-radius:3px;
  transform:scaleY(0);transform-origin:top;
  transition:transform .22s cubic-bezier(.16,.84,.44,1);
}
.prompt-row:hover::before{transform:scaleY(1)}
.prompt-code{
  font-family:var(--mono);font-size:14px;color:var(--err);
  background:rgba(226,84,74,.07);border-radius:8px;
  padding:6px 12px;display:inline-block;line-height:1.6;height:fit-content;
}
.prompt-row p{font-size:15px;color:var(--ink-2)}
.prompt-row p strong{color:var(--ink);font-weight:600}

/* ============ FAQ ============ */
.faq-wrap{display:grid;grid-template-columns:320px minmax(0,1fr);gap:64px;align-items:start}
.faq-side{position:sticky;top:104px}
.faq-side h2{
  font-size:clamp(28px,3.4vw,42px);line-height:1.16;font-weight:700;letter-spacing:-.015em;
}
.faq-side p{margin-top:14px;color:var(--ink-3);font-size:15px}
.faq-list{border-top:1px solid var(--line)}
.faq-item{border-bottom:1px solid var(--line)}
.faq-q{
  width:100%;display:flex;align-items:center;justify-content:space-between;gap:24px;
  padding:22px 0;text-align:left;
  font-size:17px;font-weight:600;color:var(--ink);
  transition:color .18s ease;
}
.faq-q:hover{color:var(--brand)}
.faq-icon{
  position:relative;flex-shrink:0;width:20px;height:20px;
  transition:transform .18s ease;
}
.faq-icon::before,.faq-icon::after{
  content:"";position:absolute;left:50%;top:50%;background:var(--brand);border-radius:2px;
  transform:translate(-50%,-50%);
}
.faq-icon::before{width:14px;height:2px}
.faq-icon::after{width:2px;height:14px;transition:opacity .18s ease}
.faq-item.open .faq-icon{transform:rotate(180deg)}
.faq-item.open .faq-icon::after{opacity:0}
.faq-a{
  max-height:0;overflow:hidden;
  transition:max-height .28s cubic-bezier(.16,.84,.44,1);
}
.faq-a p{
  padding:0 40px 24px 0;font-size:15px;line-height:1.8;color:var(--ink-3);
  max-width:680px;
}
.faq-item.open .faq-a{max-height:320px}

/* ============ CTA ============ */
.cta-block{
  background:var(--card);border:1px solid var(--line);
  border-radius:var(--r-card);box-shadow:var(--sh-1);
  display:grid;grid-template-columns:minmax(0,1.15fr) minmax(0,.85fr);
  overflow:hidden;
}
.cta-copy{padding:56px 48px}
.cta-copy h2{
  font-size:clamp(26px,3vw,36px);line-height:1.2;font-weight:700;letter-spacing:-.015em;
}
.cta-copy p{margin-top:14px;color:var(--ink-3);font-size:16px;max-width:460px}
.cta-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:32px;align-items:center}
.btn-ghost{
  display:inline-flex;align-items:center;justify-content:center;
  height:52px;padding:0 28px;border-radius:var(--r-pill);
  border:1px solid var(--ink);color:var(--ink);
  font-size:15px;font-weight:600;
  transition:background .2s ease,color .2s ease,transform .18s ease;
}
.btn-ghost:hover{background:var(--ink);color:#fff;transform:translateY(-1px)}
.btn-ghost:active{transform:scale(.985)}
.btn-lime-lg{
  display:inline-flex;align-items:center;justify-content:center;
  height:52px;padding:0 28px;border-radius:var(--r-pill);
  background:var(--lime);color:var(--ink);font-size:15px;font-weight:700;
  transition:filter .18s ease,transform .18s ease;
}
.btn-lime-lg:hover{filter:brightness(.94);transform:translateY(-1px)}
.link-arrow{
  font-size:15px;font-weight:600;color:var(--brand);
  display:inline-flex;align-items:center;gap:8px;
}
.link-arrow span{transition:transform .2s ease}
.link-arrow:hover span{transform:translateX(4px)}
.cta-media{min-height:260px;background:#EFEDE6}
.cta-media img{width:100%;height:100%}

/* ============ 页脚 ============ */
.site-footer{background:var(--ink);color:rgba(255,255,255,.78);margin-top:96px}
.footer-grid{
  display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;
  gap:48px;padding:72px 0 48px;
}
.footer-brand{
  display:flex;align-items:center;gap:10px;
  color:#fff;font-size:16px;font-weight:700;letter-spacing:-.01em;
}
.footer-brand .brand-mark{color:var(--lime)}
.footer-about{margin-top:16px;font-size:14px;line-height:1.9;color:rgba(255,255,255,.6);max-width:280px}
.footer-col h4{
  font-size:13px;font-weight:600;letter-spacing:.1em;
  color:#9AA2AD;margin-bottom:18px;
}
.footer-col a,.footer-col p{
  display:block;font-size:14px;color:rgba(255,255,255,.78);
  margin-bottom:12px;transition:color .18s ease;
}
.footer-col a:hover{color:var(--lime)}
.footer-bottom{
  border-top:1px solid rgba(255,255,255,.12);
  padding:24px 0 40px;
  display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;
  font-family:var(--mono);font-size:13px;color:#8A929C;
}

/* ============ 动效 ============ */
.reveal{opacity:0;transform:translateY(12px);transition:opacity .32s cubic-bezier(.16,.84,.44,1),transform .32s cubic-bezier(.16,.84,.44,1)}
.reveal.in{opacity:1;transform:none}
.reveal.d1{transition-delay:.06s}
.reveal.d2{transition-delay:.12s}
.reveal.d3{transition-delay:.18s}

@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  .reveal{transform:none;transition:opacity .2s linear}
  .badge .dot{animation:none}
  *{transition-duration:.01ms !important}
}

/* ============ 响应式 ============ */
@media (max-width:1279px){
  .nav-links{gap:20px}
  .search{width:170px}
  .search:focus-within{width:220px}
}
@media (max-width:1023px){
  .nav-links{display:none}
  .link-login{display:none}
  .burger{display:flex}
  .nav-actions{gap:10px}
  .search{display:none}
  .content-grid{grid-template-columns:1fr;gap:32px}
  .anchor-nav{
    position:static;
    display:flex;gap:10px;overflow-x:auto;
    padding-bottom:8px;margin-bottom:8px;
    -webkit-overflow-scrolling:touch;
  }
  .anchor-nav h2{display:none}
  .anchor-nav ul{flex-direction:row;gap:10px}
  .anchor-nav a{
    white-space:nowrap;border:1px solid var(--line);border-radius:var(--r-pill);
    padding:8px 16px;background:var(--card);
  }
  .anchor-nav a.active{border-color:var(--brand);background:var(--brand-soft)}
  .anchor-note{margin-top:8px}
  .faq-wrap{grid-template-columns:1fr;gap:32px}
  .faq-side{position:static}
  .cta-block{grid-template-columns:1fr}
  .cta-media{min-height:220px;order:-1}
  .footer-grid{grid-template-columns:1fr 1fr;gap:40px}
}
@media (max-width:767px){
  .container{padding:0 18px}
  .nav-inner{padding:0 18px;height:60px}
  .site-header.is-scrolled .nav-inner{height:56px}
  .cat-hero{padding:64px 0 32px}
  .section{padding:56px 0}
  .section.tight{padding:48px 0}
  .sec-head{margin-bottom:32px}
  .step{padding:26px 0}
  .step-ghost{font-size:44px;top:16px;right:0}
  .step-body{padding-right:64px}
  .scene{grid-template-columns:1fr;gap:8px}
  .scene::before{display:none}
  .prompt-panel{padding:4px 20px}
  .prompt-row{grid-template-columns:1fr;gap:10px}
  .prompt-row::before{left:-12px}
  .cta-copy{padding:36px 24px}
  .cta-actions .btn-ghost,.cta-actions .btn-lime-lg{width:100%}
  .footer-grid{grid-template-columns:1fr;gap:32px;padding:56px 0 32px}
  .footer-bottom{font-family:var(--font);font-size:13px}
}
@media (max-width:419px){
  .brand-text{font-size:13px;line-height:1.25;white-space:normal;max-width:112px}
  .step-body{padding-right:52px}
}

/* roulang page: category2 */
/* ============ 设计变量 ============ */
:root{
  --green:#0FA97A;
  --lime:#D6F24A;
  --ink:#101319;
  --ink-2:#2B3038;
  --paper:#F7F6F2;
  --card:#FFFFFF;
  --dark:#0D0F12;
  --line:#E3E1DB;
  --muted:#5C646F;
  --warn:#F2A93B;
  --err:#E2544A;

  --r-card:16px;
  --r-img:12px;
  --r-pill:999px;

  --sh-1:0 1px 2px rgba(16,19,25,.04), 0 8px 24px -12px rgba(16,19,25,.14);
  --sh-2:0 2px 4px rgba(16,19,25,.06), 0 18px 40px -16px rgba(16,19,25,.22);

  --sans:system-ui,-apple-system,"PingFang SC","HarmonyOS Sans SC","Source Han Sans SC","Microsoft YaHei",sans-serif;
  --mono:ui-monospace,"SF Mono",Menlo,Consolas,monospace;

  --ease:cubic-bezier(.16,.84,.44,1);
}

/* ============ 基础重置 ============ */
*,*::before,*::after{box-sizing:border-box;}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;}
body{
  margin:0;
  font-family:var(--sans);
  font-size:17px;
  line-height:1.85;
  color:var(--ink);
  background:var(--paper);
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
img{max-width:100%;display:block;border:0;}
a{color:inherit;text-decoration:none;transition:color .18s var(--ease);}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer;}
input{font:inherit;color:inherit;}
h1,h2,h3,h4{margin:0;letter-spacing:-.02em;}
p{margin:0;}
ul{margin:0;padding:0;list-style:none;}
table{border-collapse:collapse;width:100%;}
:focus-visible{outline:2px solid var(--green);outline-offset:2px;border-radius:4px;}

/* ============ 容器与板块 ============ */
.container{width:100%;max-width:1200px;margin:0 auto;padding:0 32px;}
.section{padding:104px 0;}
.section--dark{background:var(--dark);color:#fff;}
.sec-head{max-width:760px;}
.sec-head h2{
  font-size:clamp(28px,3.4vw,42px);
  line-height:1.16;
  font-weight:700;
  margin:12px 0 14px;
}
.sec-head p{color:var(--muted);font-size:17px;line-height:1.8;}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-family:var(--mono);font-size:12px;letter-spacing:.12em;
  text-transform:uppercase;color:var(--green);
}
.eyebrow::before{content:"";width:6px;height:6px;border-radius:50%;background:var(--green);}

/* ============ 导航 ============ */
.site-header{
  position:sticky;top:0;z-index:70;
  background:rgba(247,246,242,.94);
  border-bottom:1px solid transparent;
  transition:border-color .2s var(--ease),background .2s var(--ease);
}
.site-header.scrolled{
  background:rgba(247,246,242,.98);
  border-bottom-color:var(--line);
}
.nav-inner{
  max-width:1200px;margin:0 auto;
  padding:0 32px;height:68px;
  display:flex;align-items:center;gap:22px;
  transition:height .2s var(--ease);
}
.site-header.scrolled .nav-inner{height:60px;}

.brand{display:flex;align-items:center;gap:10px;flex-shrink:0;}
.brand-mark{color:var(--ink);display:flex;transition:color .18s var(--ease);}
.brand:hover .brand-mark{color:var(--green);}
.brand-text{font-size:16px;font-weight:700;letter-spacing:-.01em;line-height:1.2;}

.nav-links{display:flex;align-items:center;gap:28px;margin-left:6px;}
.nav-links a{
  position:relative;
  font-size:15px;color:var(--ink-2);
  padding:6px 0;white-space:nowrap;
}
.nav-links a::after{
  content:"";position:absolute;left:0;bottom:0;width:20px;height:2px;
  background:var(--green);transform:scaleX(0);transform-origin:left;
  transition:transform .18s var(--ease);
}
.nav-links a:hover{color:var(--ink);}
.nav-links a:hover::after{transform:scaleX(1);}
.nav-links a.active{color:var(--ink);font-weight:600;}
.nav-links a.active::after{transform:scaleX(1);}

.nav-actions{display:flex;align-items:center;gap:14px;margin-left:auto;}
.search{
  display:flex;align-items:center;gap:8px;
  width:200px;height:38px;padding:0 14px;
  background:#fff;border:1px solid var(--line);border-radius:var(--r-pill);
  color:var(--muted);
  transition:width .2s var(--ease),border-color .18s var(--ease);
}
.search:focus-within{width:280px;border-color:var(--green);}
.search input{
  flex:1;min-width:0;border:0;background:transparent;outline:none;
  font-size:14px;color:var(--ink);
}
.search input::placeholder{color:#9AA2AD;}
.link-login{font-size:15px;color:var(--ink-2);}
.link-login:hover{color:var(--green);}

.btn-lime{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:40px;padding:0 18px;border-radius:var(--r-pill);
  background:var(--lime);color:var(--ink);
  font-size:15px;font-weight:700;white-space:nowrap;
  transition:filter .18s var(--ease),transform .18s var(--ease);
}
.btn-lime:hover{filter:brightness(.94);transform:translateY(-1px);}
.btn-lime:active{transform:scale(.985);}

.burger{
  display:none;width:44px;height:44px;
  align-items:center;justify-content:center;
  border:1px solid var(--line);border-radius:12px;background:#fff;
}
.burger span{position:relative;display:block;width:16px;height:2px;background:var(--ink);}
.burger span::before,.burger span::after{
  content:"";position:absolute;left:0;width:16px;height:2px;background:var(--ink);
}
.burger span::before{top:-5px;}
.burger span::after{top:5px;}

/* 抽屉 */
.drawer{
  position:fixed;top:0;right:0;bottom:0;z-index:90;
  width:min(330px,86vw);padding:26px 24px 32px;
  background:#fff;border-left:1px solid var(--line);
  transform:translateX(100%);
  transition:transform .28s var(--ease);
  display:flex;flex-direction:column;gap:18px;overflow-y:auto;
}
.drawer.open{transform:none;}
.drawer-nav a{
  display:block;padding:14px 0;font-size:16px;
  border-bottom:1px solid var(--line);color:var(--ink);
}
.drawer-nav a.active{color:var(--green);font-weight:700;}
.drawer .search{width:100%;}
.drawer .search:focus-within{width:100%;}
.drawer-note{font-size:13px;color:var(--muted);line-height:1.7;}
.drawer-mask{
  position:fixed;inset:0;z-index:80;background:rgba(16,19,25,.36);
  opacity:0;visibility:hidden;transition:opacity .24s var(--ease),visibility .24s;
}
.drawer-mask.open{opacity:1;visibility:visible;}

/* ============ 按钮 ============ */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:10px;
  height:52px;padding:0 28px;border-radius:var(--r-pill);
  font-size:16px;font-weight:700;white-space:nowrap;
  transition:filter .18s var(--ease),transform .18s var(--ease),background .18s var(--ease),color .18s var(--ease),border-color .18s var(--ease);
}
.btn--lime{background:var(--lime);color:var(--ink);}
.btn--lime:hover{filter:brightness(.94);transform:translateY(-1px);}
.btn--lime:active{transform:scale(.985);}
.btn--outline{border:1px solid var(--ink);color:var(--ink);}
.btn--outline:hover{background:var(--ink);color:#fff;}
.btn--ghost-light{border:1px solid rgba(255,255,255,.35);color:#fff;}
.btn--ghost-light:hover{background:rgba(255,255,255,.08);border-color:rgba(255,255,255,.6);}
.btn--sm{height:44px;padding:0 20px;font-size:15px;}
.btn small{font-family:var(--mono);font-size:13px;font-weight:400;opacity:.72;}

.link-arrow{
  display:inline-flex;align-items:center;gap:6px;
  font-size:15px;font-weight:600;color:var(--ink);
}
.link-arrow svg{transition:transform .18s var(--ease);}
.link-arrow:hover{color:var(--green);}
.link-arrow:hover svg{transform:translateX(4px);}

/* ============ Hero ============ */
.cat-hero{
  position:relative;overflow:hidden;
  background:
    linear-gradient(rgba(13,15,18,.93),rgba(13,15,18,.96)),
    url('/assets/images/backpic/back-2.webp') center/cover no-repeat,
    #0D0F12;
  color:#fff;
  padding:96px 0 104px;
  text-align:center;
}
.cat-hero::before{
  content:"";position:absolute;inset:0;pointer-events:none;
  background-image:
    linear-gradient(rgba(255,255,255,.055) 1px,transparent 1px),
    linear-gradient(90deg,rgba(255,255,255,.055) 1px,transparent 1px);
  background-size:8px 8px;
}
.cat-hero .inner{position:relative;max-width:900px;margin:0 auto;padding:0 32px;}
.hero-badge{
  display:inline-flex;align-items:center;gap:10px;
  padding:8px 16px;border-radius:var(--r-pill);
  border:1px solid rgba(214,242,74,.5);
  background:rgba(214,242,74,.08);
  font-family:var(--mono);font-size:12.5px;letter-spacing:.06em;color:var(--lime);
}
.hero-badge .dot{
  width:6px;height:6px;border-radius:50%;background:var(--green);
  animation:breathe 1.6s ease-in-out infinite;
}
@keyframes breathe{0%,100%{opacity:1;transform:scale(1);}50%{opacity:.45;transform:scale(.82);}}
.cat-hero h1{
  margin:24px 0 18px;
  font-size:clamp(34px,5vw,60px);
  line-height:1.08;font-weight:800;
}
.cat-hero .lede{
  max-width:640px;margin:0 auto;
  font-size:18px;line-height:1.8;color:rgba(255,255,255,.76);
}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;justify-content:center;margin-top:36px;}
.hero-trust{
  display:flex;flex-wrap:wrap;justify-content:center;gap:14px 28px;
  margin-top:36px;padding-top:26px;
  border-top:1px solid rgba(255,255,255,.1);
}
.trust-item{
  display:flex;align-items:center;gap:8px;
  font-family:var(--mono);font-size:13px;color:rgba(255,255,255,.62);
}
.trust-item::before{content:"";width:6px;height:6px;border-radius:50%;background:var(--green);flex-shrink:0;}

/* ============ 平台切换 ============ */
.tabbar{
  display:flex;gap:4px;margin-top:34px;
  border-bottom:1px solid var(--line);
  overflow-x:auto;scrollbar-width:none;
}
.tabbar::-webkit-scrollbar{display:none;}
.tab{
  position:relative;padding:15px 20px;white-space:nowrap;
  font-size:15px;color:var(--muted);
  transition:color .18s var(--ease);
}
.tab::after{
  content:"";position:absolute;left:20px;right:20px;bottom:-1px;height:2px;
  background:var(--lime);transform:scaleX(0);
  transition:transform .18s var(--ease);
}
.tab:hover{color:var(--ink);}
.tab.active{color:var(--ink);font-weight:700;}
.tab.active::after{transform:scaleX(1);}

.panel{display:none;}
.panel.active{display:block;animation:fadeIn .16s ease-out;}
@keyframes fadeIn{from{opacity:0;}to{opacity:1;}}

.panel-head{
  display:flex;flex-wrap:wrap;align-items:baseline;gap:12px;
  margin:32px 0 18px;
}
.panel-head h3{font-size:22px;font-weight:650;}
.panel-head span{font-family:var(--mono);font-size:13px;color:var(--muted);}

.table-wrap{
  overflow-x:auto;background:#fff;
  border:1px solid var(--line);border-radius:var(--r-img);
}
.spec-table{min-width:560px;}
.spec-table th,.spec-table td{
  height:56px;padding:0 22px;text-align:left;
  border-bottom:1px solid var(--line);
  font-size:15px;color:var(--ink-2);
}
.spec-table th{
  font-size:13px;font-weight:600;letter-spacing:.06em;
  color:var(--muted);background:var(--paper);
}
.spec-table td:first-child{color:var(--ink-2);font-weight:600;}
.spec-table td:nth-child(2),.spec-table td:nth-child(3){
  font-family:var(--mono);font-size:14px;font-variant-numeric:tabular-nums;
}
.spec-table tbody tr:nth-child(odd){background:var(--paper);}
.spec-table tbody tr:hover td:first-child{box-shadow:inset 3px 0 0 var(--green);}
.spec-table tbody tr:last-child td{border-bottom:0;}

.dl-row{display:flex;flex-wrap:wrap;gap:12px;margin-top:24px;}
.hint{
  display:flex;align-items:flex-start;gap:8px;
  margin-top:18px;font-size:13px;color:var(--muted);
}
.hint svg{flex-shrink:0;margin-top:4px;color:var(--green);}

/* ============ 图文条目 ============ */
.media-list{border-top:1px solid var(--line);}
.media-row{
  display:grid;grid-template-columns:1fr 1fr;gap:56px;align-items:center;
  padding:48px 0;border-bottom:1px solid var(--line);
}
.media-row .fig{order:0;}
.media-row.flip .fig{order:2;}
.media-row.flip .txt{order:1;}
.fig{
  position:relative;border-radius:var(--r-img);overflow:hidden;
  border:1px solid var(--line);aspect-ratio:16/10;
  background:linear-gradient(135deg,rgba(15,169,122,.10),rgba(15,169,122,.02));
}
.fig img{width:100%;height:100%;object-fit:cover;transition:transform .24s var(--ease);}
.media-row:hover .fig img{transform:scale(1.03);}
.num{
  font-family:var(--mono);font-size:13px;letter-spacing:.14em;color:var(--green);
  display:block;margin-bottom:12px;
}
.txt h3{font-size:22px;font-weight:650;line-height:1.4;margin-bottom:12px;}
.txt p{color:var(--muted);font-size:16px;line-height:1.85;}

/* ============ 排查清单 ============ */
.check-list{
  display:grid;grid-template-columns:repeat(2,minmax(0,1fr));
  gap:0 48px;margin-top:36px;
}
.check-item{
  position:relative;padding:22px 0 22px 20px;
  border-bottom:1px solid var(--line);
  transition:background .18s var(--ease);
}
.check-item::before{
  content:"";position:absolute;left:0;top:24px;bottom:24px;width:3px;
  background:var(--green);transform:scaleY(0);transform-origin:top;
  transition:transform .18s var(--ease);
}
.check-item:hover{background:var(--paper);}
.check-item:hover::before{transform:scaleY(1);}
.check-item h4{font-size:17px;font-weight:650;margin-bottom:6px;}
.check-item p{font-size:14.5px;color:var(--muted);line-height:1.8;}

/* ============ FAQ ============ */
.faq-layout{
  display:grid;grid-template-columns:minmax(0,320px) minmax(0,1fr);
  gap:64px;align-items:start;margin-top:8px;
}
.faq-aside{position:sticky;top:100px;}
.faq-aside h2{
  font-size:clamp(26px,3vw,36px);line-height:1.2;font-weight:700;margin-bottom:14px;
}
.faq-aside p{font-size:16px;color:var(--muted);line-height:1.8;}
.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:20px;
  padding:22px 0;text-align:left;
  font-size:17px;font-weight:600;line-height:1.6;color:var(--ink);
}
.faq-q:hover{color:var(--green);}
.faq-icon{
  flex-shrink:0;font-family:var(--mono);font-size:20px;color:var(--green);
  transition:transform .18s var(--ease);
}
.faq-item.open .faq-icon{transform:rotate(180deg);}
.faq-a{max-height:0;overflow:hidden;transition:max-height .24s var(--ease);}
.faq-a p{
  margin:0 0 22px;font-size:15px;line-height:1.8;color:var(--ink-2);
  max-width:760px;
}

/* ============ CTA ============ */
.cta-box{
  position:relative;overflow:hidden;
  background:#fff;border:1px solid var(--line);border-radius:var(--r-card);
  padding:64px 40px;text-align:center;box-shadow:var(--sh-1);
}
.cta-box::before{
  content:"";position:absolute;inset:0;pointer-events:none;
  background-image:
    linear-gradient(rgba(16,19,25,.035) 1px,transparent 1px),
    linear-gradient(90deg,rgba(16,19,25,.035) 1px,transparent 1px);
  background-size:8px 8px;
}
.cta-box > *{position:relative;}
.cta-box h2{font-size:clamp(26px,3.2vw,38px);line-height:1.2;font-weight:700;margin-bottom:14px;}
.cta-box p{max-width:560px;margin:0 auto;color:var(--muted);font-size:17px;line-height:1.8;}
.cta-actions{display:flex;flex-wrap:wrap;gap:14px;justify-content:center;margin-top:32px;}
.cta-links{
  display:flex;flex-wrap:wrap;gap:28px;justify-content:center;
  margin-top:32px;padding-top:26px;border-top:1px solid var(--line);
}

/* ============ 页脚 ============ */
.site-footer{background:#101319;color:rgba(255,255,255,.78);padding:72px 0 28px;}
.footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1fr;gap:40px;}
.footer-brand{
  display:flex;align-items:center;gap:10px;
  color:#fff;font-size:16px;font-weight:700;letter-spacing:-.01em;
}
.footer-brand .brand-mark{color:var(--lime);}
.footer-about{margin-top:14px;font-size:14px;line-height:1.8;color:rgba(255,255,255,.66);max-width:280px;}
.footer-col h4{
  margin:0 0 16px;font-size:13px;font-weight:600;
  letter-spacing:.1em;color:#9AA2AD;
}
.footer-col a,.footer-col p{
  display:block;margin:0 0 10px;
  font-size:14px;color:rgba(255,255,255,.78);line-height:1.7;
}
.footer-col a:hover{color:var(--lime);}
.footer-bottom{
  display:flex;flex-wrap:wrap;gap:12px;justify-content:space-between;
  margin-top:48px;padding-top:20px;
  border-top:1px solid rgba(255,255,255,.1);
  font-size:13px;color:#9AA2AD;
  font-family:var(--mono);
}

/* ============ 进场动效 ============ */
.js .reveal{
  opacity:0;transform:translateY(12px);
  transition:opacity .32s var(--ease),transform .32s var(--ease);
}
.js .reveal.in{opacity:1;transform:none;}

@media (prefers-reduced-motion: reduce){
  html{scroll-behavior:auto;}
  .js .reveal{opacity:1;transform:none;transition:opacity .2s linear;}
  .hero-badge .dot{animation:none;}
  *{transition-duration:.01ms !important;animation-duration:.01ms !important;}
}

/* ============ 响应式 ============ */
@media (max-width:1100px){
  .nav-links{gap:18px;}
  .search{width:160px;}
  .search:focus-within{width:220px;}
}

@media (max-width:1023px){
  .container,.nav-inner{padding:0 24px;}
  .section{padding:84px 0;}
  .media-row{gap:40px;}
  .faq-layout{grid-template-columns:1fr;gap:32px;}
  .faq-aside{position:static;}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px;}
}

@media (max-width:940px){
  .nav-links,.link-login,.nav-actions > .search{display:none;}
  .burger{display:flex;}
}

@media (max-width:768px){
  body{font-size:16px;}
  .container,.nav-inner{padding:0 18px;}
  .section{padding:60px 0;}
  .cat-hero{padding:64px 0 72px;}
  .cat-hero .inner{padding:0 18px;}
  .cat-hero .lede{font-size:16.5px;}
  .hero-actions{flex-direction:column;align-items:stretch;}
  .hero-actions .btn{width:100%;}
  .hero-trust{gap:12px 20px;}
  .media-row{grid-template-columns:1fr;gap:22px;padding:36px 0;}
  .media-row .fig,.media-row.flip .fig{order:0;}
  .media-row.flip .txt{order:1;}
  .check-list{grid-template-columns:1fr;}
  .cta-box{padding:44px 22px;}
  .cta-actions{flex-direction:column;align-items:stretch;}
  .cta-actions .btn{width:100%;}
  .footer-grid{grid-template-columns:1fr;gap:28px;}
  .footer-bottom{flex-direction:column;gap:8px;}
  .tabbar{margin-top:24px;}
  .tab{padding:14px 16px;font-size:14.5px;}
  .tab::after{left:16px;right:16px;}
}

@media (max-width:420px){
  .brand-text{font-size:13px;line-height:1.2;max-width:118px;}
  .trust-item:nth-child(3){display:none;}
  .cta-links{gap:20px;}
}