/* roulang page: index */
:root{
  --primary:#E24B3C;
  --primary-dark:#B7372C;
  --primary-soft:#FBE7E3;
  --night:#2A1E33;
  --night-2:#382843;
  --teal:#1E9E8A;
  --teal-soft:#E2F3F0;
  --gold:#F0B429;
  --bg:#FAF6F2;
  --bg-2:#F2EAE3;
  --line:#E7DCD4;
  --ink:#221826;
  --ink-2:#4A3B4F;
  --ink-3:#7C6E80;
  --white:#FFFFFF;
  --r-card:16px;
  --r-btn:10px;
  --r-img:14px;
  --sh-1:0 1px 2px rgba(34,24,38,.04);
  --sh-2:0 6px 18px rgba(34,24,38,.07);
  --sh-3:0 14px 32px rgba(34,24,38,.12);
  --ease:cubic-bezier(.32,.72,.36,1);
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  margin:0;
  font-family:-apple-system,"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Noto Sans SC",sans-serif;
  font-size:16px;
  line-height:1.75;
  color:var(--ink);
  background:var(--bg);
  -webkit-font-smoothing:antialiased;
  font-variant-numeric:tabular-nums;
}
img{max-width:100%;display:block;border:0}
a{color:inherit;text-decoration:none;transition:color .2s var(--ease)}
h1,h2,h3,h4,p,ul,ol,figure{margin:0}
ul,ol{padding:0;list-style:none}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer}
:focus-visible{outline:2px solid var(--primary);outline-offset:2px;border-radius:4px}
.container{width:100%;max-width:1200px;margin:0 auto;padding:0 24px}

/* ============ header ============ */
.site-header{
  position:sticky;top:0;z-index:120;
  background:rgba(250,246,242,.9);
  -webkit-backdrop-filter:saturate(140%) blur(8px);
  backdrop-filter:saturate(140%) blur(8px);
  border-bottom:1px solid var(--line);
  transition:box-shadow .25s var(--ease);
}
.site-header.is-scrolled{box-shadow:var(--sh-2)}
.header-inner{display:flex;align-items:center;height:72px;gap:28px;transition:height .25s var(--ease)}
.site-header.is-scrolled .header-inner{height:60px}
.logo{display:inline-flex;align-items:center;gap:10px;font-weight:800;font-size:17px;letter-spacing:-.01em;color:var(--ink);white-space:nowrap}
.logo-mark{
  width:34px;height:34px;flex:0 0 34px;border-radius:11px;
  background:linear-gradient(135deg,var(--primary) 0%,#F0775F 100%);
  color:#fff;display:grid;place-items:center;font-size:16px;font-weight:800;
  box-shadow:0 4px 12px rgba(226,75,60,.28);
}
.logo:hover .logo-mark{transform:translateY(-1px)}
.logo-mark{transition:transform .2s var(--ease)}
.main-nav{display:flex;align-items:center;gap:6px;margin-left:8px}
.main-nav a{
  position:relative;display:inline-block;padding:10px 12px;
  font-size:15px;color:var(--ink-2);border-radius:8px;
}
.main-nav a::after{
  content:"";position:absolute;left:12px;right:12px;bottom:4px;height:2px;
  background:transparent;border-radius:2px;transition:background .2s var(--ease);
}
.main-nav a:hover{color:var(--primary)}
.main-nav a.is-active{color:var(--primary);font-weight:600}
.main-nav a.is-active::after{background:var(--primary)}
.header-actions{margin-left:auto;display:flex;align-items:center;gap:12px}

/* ============ buttons ============ */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:46px;padding:0 22px;border-radius:var(--r-btn);
  font-size:15px;font-weight:600;letter-spacing:.01em;
  transition:background .2s var(--ease),color .2s var(--ease),transform .15s var(--ease),box-shadow .2s var(--ease),border-color .2s var(--ease);
  border:1.5px solid transparent;
}
.btn-primary{background:var(--primary);color:#fff;box-shadow:0 6px 16px rgba(226,75,60,.24)}
.btn-primary:hover{background:var(--primary-dark);transform:translateY(-1px);box-shadow:0 10px 22px rgba(226,75,60,.3)}
.btn-ghost{background:transparent;color:var(--primary);border-color:var(--primary)}
.btn-ghost:hover{background:var(--primary);color:#fff;transform:translateY(-1px)}
.btn-night{background:transparent;color:#fff;border-color:rgba(255,255,255,.42)}
.btn-night:hover{background:#fff;color:var(--night);border-color:#fff}
.btn-sm{height:38px;padding:0 16px;font-size:14px}
.btn-block{width:100%}
.btn:active{transform:translateY(1px)}
.link-arrow{
  display:inline-flex;align-items:center;gap:6px;font-size:14px;font-weight:600;color:var(--primary);
}
.link-arrow .arw{transition:transform .2s var(--ease)}
.link-arrow:hover .arw{transform:translateX(3px)}
.text-link{font-size:14px;color:var(--ink-2);border-bottom:1px solid var(--line);padding-bottom:1px}
.text-link:hover{color:var(--primary);border-color:var(--primary)}

/* ============ mobile drawer ============ */
.menu-toggle{display:none;width:42px;height:42px;border-radius:10px;border:1px solid var(--line);background:#fff;align-items:center;justify-content:center}
.menu-toggle span,.menu-toggle span::before,.menu-toggle span::after{
  content:"";display:block;width:18px;height:2px;background:var(--ink);border-radius:2px;transition:.2s var(--ease)
}
.menu-toggle span::before{transform:translateY(-6px)}
.menu-toggle span::after{transform:translateY(4px)}
.drawer-mask{
  position:fixed;inset:0;background:rgba(34,24,38,.4);opacity:0;visibility:hidden;
  transition:opacity .25s var(--ease),visibility .25s;z-index:130;
}
.drawer-mask.is-open{opacity:1;visibility:visible}
.drawer{
  position:fixed;top:0;right:0;bottom:0;width:82%;max-width:340px;z-index:140;
  background:var(--bg);padding:24px 22px;transform:translateX(102%);
  transition:transform .28s var(--ease);box-shadow:var(--sh-3);
  display:flex;flex-direction:column;gap:20px;overflow-y:auto;
}
.drawer.is-open{transform:translateX(0)}
.drawer-head{display:flex;align-items:center;justify-content:space-between}
.drawer-close{width:38px;height:38px;border-radius:10px;border:1px solid var(--line);display:grid;place-items:center;font-size:18px;color:var(--ink-2);background:#fff}
.drawer-nav{display:flex;flex-direction:column;gap:4px}
.drawer-nav a{padding:13px 12px;border-radius:10px;font-size:15px;color:var(--ink-2);font-weight:500}
.drawer-nav a:hover,.drawer-nav a.is-active{background:var(--primary-soft);color:var(--primary)}

/* ============ hero ============ */
.hero{
  position:relative;overflow:hidden;
  padding:68px 0 76px;
  background:linear-gradient(158deg,#FFF9F4 0%,#FAF6F2 46%,#F4E9E0 100%);
  border-bottom:1px solid var(--line);
}
.hero::before{
  content:"";position:absolute;right:-140px;top:-160px;width:520px;height:520px;border-radius:50%;
  background:radial-gradient(circle at 30% 30%,rgba(226,75,60,.16),rgba(240,180,41,.08) 55%,rgba(250,246,242,0) 72%);
  pointer-events:none;
}
.hero::after{
  content:"";position:absolute;left:-120px;bottom:-180px;width:420px;height:420px;border-radius:50%;
  background:radial-gradient(circle,rgba(30,158,138,.12),rgba(250,246,242,0) 70%);
  pointer-events:none;
}
.hero-grid{position:relative;display:grid;grid-template-columns:1.06fr .94fr;gap:52px;align-items:center}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  padding:6px 14px;border-radius:999px;background:#fff;border:1px solid var(--line);
  font-size:13px;color:var(--ink-2);box-shadow:var(--sh-1);
}
.eyebrow i{width:7px;height:7px;border-radius:50%;background:var(--teal);display:inline-block}
.hero h1{
  margin-top:20px;
  font-size:clamp(30px,4.4vw,46px);
  line-height:1.24;font-weight:800;letter-spacing:-.01em;color:var(--ink);
}
.hero h1 em{font-style:normal;color:var(--primary)}
.hero-sub{margin-top:18px;font-size:17px;line-height:1.7;color:var(--ink-2);max-width:30em}
.hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:28px}
.hero-badges{display:flex;flex-wrap:wrap;gap:10px;margin-top:26px}
.badge{
  display:inline-flex;align-items:center;gap:7px;
  padding:7px 14px;border-radius:999px;background:#fff;border:1px solid var(--line);
  font-size:13px;color:var(--ink-2);
}
.badge svg{width:15px;height:15px;flex:0 0 15px}
.badge .dot-teal{color:var(--teal)}
.hero-media{position:relative}
.hero-media img{
  width:100%;aspect-ratio:4/3;object-fit:cover;border-radius:20px;
  box-shadow:0 22px 48px rgba(34,24,38,.18);
}
.float-card{
  position:absolute;left:-16px;bottom:-20px;
  background:#fff;border-radius:14px;padding:14px 18px;border:1px solid var(--line);
  box-shadow:var(--sh-2);display:flex;align-items:center;gap:14px;
}
.float-card .fc-num{font-size:22px;font-weight:800;color:var(--primary);line-height:1.1}
.float-card .fc-label{font-size:12.5px;color:var(--ink-3);line-height:1.4}
.float-card .fc-div{width:1px;height:30px;background:var(--line)}

/* ============ sections ============ */
.section{padding:72px 0}
.section--alt{background:var(--bg-2)}
.section--white{background:#fff}
.section--dark{background:var(--night);color:#fff;padding:80px 0}
.section-head{max-width:720px;margin-bottom:40px}
.section-head.center{margin-left:auto;margin-right:auto;text-align:center}
.kicker{
  display:inline-block;font-size:13px;font-weight:600;letter-spacing:.06em;
  color:var(--primary);text-transform:uppercase;
}
.section h2{
  margin-top:10px;
  font-size:clamp(24px,3vw,34px);line-height:1.32;font-weight:800;letter-spacing:-.01em;
}
.section-desc{margin-top:12px;font-size:15.5px;color:var(--ink-2);line-height:1.75}
.section--dark h2{color:#fff}
.section--dark .section-desc{color:rgba(255,255,255,.72)}

/* ============ chips strip ============ */
.chip-strip{display:flex;flex-wrap:wrap;gap:12px}
.chip{
  display:inline-flex;align-items:center;gap:9px;
  padding:11px 20px;border-radius:999px;border:1.5px solid var(--line);
  background:#fff;font-size:14.5px;font-weight:600;color:var(--ink-2);
  transition:.2s var(--ease);
}
.chip i{
  width:20px;height:20px;border-radius:6px;display:grid;place-items:center;
  background:var(--primary-soft);color:var(--primary);font-size:12px;font-weight:800;font-style:normal;
}
.chip:hover{border-color:var(--primary);color:var(--primary);transform:translateY(-2px);box-shadow:var(--sh-2)}
.chip:nth-child(2) i{background:var(--teal-soft);color:var(--teal)}
.chip:nth-child(3) i{background:#F3E9F7;color:#7C4A96}
.chip:nth-child(4) i{background:#FCF1DA;color:#B5860B}

/* ============ stats ============ */
.stats{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.stat{
  background:rgba(255,255,255,.72);border-radius:var(--r-card);padding:26px 22px;
  transition:.25s var(--ease);
}
.stat:hover{background:#fff;box-shadow:var(--sh-2);transform:translateY(-2px)}
.stat-num{font-size:32px;font-weight:800;color:var(--primary);line-height:1.15;letter-spacing:-.02em}
.stat-num small{font-size:16px;font-weight:700;margin-left:2px}
.stat-label{margin-top:8px;font-size:13px;color:var(--ink-3);line-height:1.6}

/* ============ feature asymmetric grid ============ */
.feature-grid{display:grid;grid-template-columns:1.55fr 1fr;gap:24px}
.fcard{
  background:#fff;border:1px solid var(--line);border-radius:var(--r-card);
  padding:28px;display:flex;flex-direction:column;gap:14px;
  transition:.25s var(--ease);position:relative;overflow:hidden;
}
.fcard:hover{transform:translateY(-3px);box-shadow:var(--sh-3);border-color:#DCCEC4}
.fcard--lead{justify-content:space-between;background:linear-gradient(150deg,#fff 0%,#FFF6F2 100%)}
.fcard-icon{
  width:46px;height:46px;border-radius:13px;display:grid;place-items:center;
  background:var(--primary-soft);color:var(--primary);
}
.fcard--alt .fcard-icon{background:var(--teal-soft);color:var(--teal)}
.fcard h3{font-size:20px;font-weight:800;line-height:1.4}
.fcard p{font-size:14.5px;color:var(--ink-2);line-height:1.7}
.fcard--lead h3{font-size:24px}
.fcard--lead p{font-size:15.5px;max-width:30em}
.fcard-side{display:grid;grid-template-rows:1fr 1fr;gap:24px}
.fcard-media{
  margin-top:auto;border-radius:var(--r-img);overflow:hidden;
}
.fcard-media img{width:100%;aspect-ratio:16/9;object-fit:cover;transition:transform .4s var(--ease)}
.fcard:hover .fcard-media img{transform:scale(1.03)}

/* ============ track ============ */
.track{
  display:flex;gap:20px;overflow-x:auto;padding:6px 4px 22px;
  scroll-snap-type:x mandatory;-webkit-overflow-scrolling:touch;
}
.track::-webkit-scrollbar{height:6px}
.track::-webkit-scrollbar-thumb{background:#D9CBC2;border-radius:999px}
.run-card{
  flex:0 0 286px;scroll-snap-align:start;
  background:#fff;border:1px solid var(--line);border-radius:var(--r-card);
  padding:22px;display:flex;flex-direction:column;gap:12px;
  transition:.25s var(--ease);
}
.run-card:hover{transform:translateY(-4px);box-shadow:var(--sh-3)}
.run-city{display:flex;align-items:center;justify-content:space-between;gap:10px}
.run-city b{font-size:17px;font-weight:800}
.pill{
  display:inline-flex;align-items:center;padding:4px 11px;border-radius:999px;
  font-size:12.5px;font-weight:600;background:var(--teal-soft);color:#127A6A;
}
.pill--warm{background:var(--primary-soft);color:var(--primary)}
.pill--gold{background:#FCF1DA;color:#9A6F06}
.run-meta{font-size:13.5px;color:var(--ink-3);display:flex;flex-direction:column;gap:5px}
.run-meta span{display:flex;align-items:center;gap:7px}
.run-tags{display:flex;flex-wrap:wrap;gap:8px;margin-top:auto;padding-top:6px}
.tag{
  display:inline-flex;padding:4px 10px;border-radius:999px;border:1px solid var(--line);
  font-size:12.5px;color:var(--ink-2);background:var(--bg);
}
.track-foot{display:flex;justify-content:flex-end;margin-top:4px}

/* ============ split ============ */
.split{display:grid;grid-template-columns:1fr 1fr;gap:52px;align-items:center}
.split-media img{width:100%;aspect-ratio:4/3;object-fit:cover;border-radius:var(--r-card);box-shadow:var(--sh-2)}
.point-list{display:flex;flex-direction:column;gap:22px;margin-top:26px}
.point{display:flex;gap:16px}
.point-num{
  flex:0 0 34px;width:34px;height:34px;border-radius:11px;display:grid;place-items:center;
  background:var(--primary-soft);color:var(--primary);font-weight:800;font-size:14px;
}
.point h3{font-size:17px;font-weight:800;line-height:1.5}
.point p{font-size:14.5px;color:var(--ink-2);margin-top:4px;line-height:1.7}
.compliance{
  margin-top:28px;padding-top:18px;border-top:1px dashed var(--line);
  font-size:13px;color:var(--ink-3);line-height:1.8;
}

/* ============ timeline ============ */
.timeline{position:relative;display:grid;grid-template-columns:repeat(4,1fr);gap:24px;margin-top:12px}
.timeline::before{
  content:"";position:absolute;left:5%;right:5%;top:27px;height:0;
  border-top:1px dashed #D6C6BC;
}
.step{position:relative;padding-top:0;text-align:left}
.step-num{
  position:relative;z-index:2;width:54px;height:54px;border-radius:50%;
  display:grid;place-items:center;font-size:17px;font-weight:800;
  background:#fff;border:1.5px solid var(--line);color:var(--primary);
  box-shadow:var(--sh-1);transition:.25s var(--ease);
}
.step:hover .step-num{background:var(--primary);color:#fff;border-color:var(--primary);box-shadow:0 8px 20px rgba(226,75,60,.28)}
.step h3{margin-top:16px;font-size:17px;font-weight:800}
.step p{margin-top:6px;font-size:14px;color:var(--ink-2);line-height:1.7}

/* ============ dark security ============ */
.security-grid{display:grid;grid-template-columns:.95fr 1.05fr;gap:56px;align-items:start}
.security h2{color:#fff;font-size:clamp(24px,3vw,34px);font-weight:800;line-height:1.32}
.security .lead{margin-top:14px;font-size:15.5px;color:rgba(255,255,255,.72);line-height:1.8}
.sec-list{display:flex;flex-direction:column;gap:14px}
.sec-item{
  display:flex;gap:16px;align-items:flex-start;
  background:rgba(255,255,255,.06);border:1px solid rgba(255,255,255,.1);
  border-radius:14px;padding:20px 22px;transition:.25s var(--ease);
}
.sec-item:hover{background:rgba(255,255,255,.11);transform:translateX(4px)}
.sec-icon{
  flex:0 0 38px;width:38px;height:38px;border-radius:11px;display:grid;place-items:center;
  background:rgba(30,158,138,.18);color:#5FD7C2;
}
.sec-item h3{font-size:16.5px;font-weight:800;color:#fff}
.sec-item p{font-size:14px;color:rgba(255,255,255,.66);margin-top:4px;line-height:1.7}

/* ============ city cloud ============ */
.city-cloud{display:flex;flex-wrap:wrap;gap:11px;margin-top:6px}
.city{
  padding:10px 18px;border-radius:999px;background:#fff;border:1px solid var(--line);
  font-size:14px;color:var(--ink-2);transition:.2s var(--ease);
}
.city:hover{background:var(--primary);border-color:var(--primary);color:#fff;transform:translateY(-2px)}
.city-note{margin-top:20px;font-size:13.5px;color:var(--ink-3)}

/* ============ plans ============ */
.plans{display:grid;grid-template-columns:1fr 1fr;gap:24px;max-width:900px;margin:0 auto}
.plan{
  position:relative;background:#fff;border:1px solid var(--line);border-radius:var(--r-card);
  padding:30px;transition:.25s var(--ease);
}
.plan:hover{box-shadow:var(--sh-3);transform:translateY(-3px)}
.plan--pro{border:1.5px solid var(--primary);box-shadow:0 10px 28px rgba(226,75,60,.12)}
.plan-flag{
  position:absolute;top:-13px;right:22px;background:var(--primary);color:#fff;
  font-size:12.5px;font-weight:700;padding:4px 14px;border-radius:999px;letter-spacing:.02em;
}
.plan h3{font-size:20px;font-weight:800}
.plan .plan-desc{margin-top:6px;font-size:13.5px;color:var(--ink-3)}
.plan ul{margin-top:20px;display:flex;flex-direction:column;gap:13px}
.plan li{display:flex;gap:11px;align-items:flex-start;font-size:14.5px;color:var(--ink-2);line-height:1.65}
.check{
  flex:0 0 20px;width:20px;height:20px;border-radius:50%;display:grid;place-items:center;
  background:var(--teal-soft);color:var(--teal);margin-top:2px;
}
.plan--pro .check{background:var(--primary-soft);color:var(--primary)}
.plan-foot{margin-top:24px}

/* ============ reviews ============ */
.reviews{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.review{
  background:#fff;border:1px solid var(--line);border-radius:var(--r-card);padding:24px;
  display:flex;flex-direction:column;gap:14px;transition:.25s var(--ease);
}
.review:hover{transform:translateY(-3px);box-shadow:var(--sh-3)}
.review-top{display:flex;align-items:center;gap:12px}
.avatar{
  width:42px;height:42px;border-radius:50%;display:grid;place-items:center;
  background:linear-gradient(140deg,#F6D6CE,#EFC1B6);color:#8C3A2C;font-weight:800;font-size:16px;
}
.review-name{font-size:15px;font-weight:700}
.review-city{font-size:12.5px;color:var(--ink-3)}
.stars{color:var(--gold);font-size:13px;letter-spacing:2px;line-height:1}
.review p{font-size:14.5px;color:var(--ink-2);line-height:1.75}
.review .tag{align-self:flex-start;margin-top:auto}

/* ============ download ============ */
.download-box{
  display:grid;grid-template-columns:1.25fr .75fr;gap:40px;align-items:center;
  background:#fff;border:1px solid var(--line);border-radius:20px;padding:38px;
  box-shadow:var(--sh-2);
}
.ver-row{display:flex;gap:14px;padding:14px 0;border-bottom:1px solid var(--line);font-size:14.5px}
.ver-row:last-of-type{border-bottom:0}
.ver-key{flex:0 0 84px;color:var(--ink-3);font-size:13.5px}
.ver-val{color:var(--ink-2)}
.qr{
  width:150px;height:150px;border-radius:14px;border:1.5px dashed #D6C6BC;
  display:grid;place-items:center;background:var(--bg-2);color:var(--ink-3);
  font-size:12.5px;text-align:center;line-height:1.6;padding:12px;margin:0 auto;
}
.dl-actions{display:flex;flex-direction:column;gap:10px;margin-top:18px}

/* ============ news ============ */
.news-head{display:flex;align-items:flex-end;justify-content:space-between;gap:20px;margin-bottom:32px;flex-wrap:wrap}
.news-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:20px}
.news-card{
  display:flex;flex-direction:column;gap:11px;background:#fff;border:1px solid var(--line);
  border-radius:var(--r-card);padding:22px;transition:.25s var(--ease);
}
.news-card:hover{transform:translateY(-3px);box-shadow:var(--sh-3);border-color:#DCCEC4}
.news-meta{display:flex;align-items:center;gap:12px;font-size:12.5px;color:var(--ink-3)}
.news-card h3{font-size:17px;font-weight:800;line-height:1.5;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.news-card p{font-size:14px;color:var(--ink-2);line-height:1.7;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.empty-state{
  text-align:center;padding:56px 20px;border:1px dashed var(--line);border-radius:var(--r-card);background:#fff;
}
.empty-state p{font-size:15px;color:var(--ink-2);margin-bottom:18px}

/* ============ faq ============ */
.faq{max-width:860px;margin:0 auto}
.faq-item{border-top:1px solid var(--line)}
.faq-item:last-child{border-bottom:1px solid var(--line)}
.faq-q{
  width:100%;display:flex;align-items:center;justify-content:space-between;gap:18px;
  padding:20px 4px;text-align:left;font-size:16.5px;font-weight:700;color:var(--ink);
  transition:color .2s var(--ease);
}
.faq-q:hover{color:var(--primary)}
.faq-icon{position:relative;flex:0 0 18px;width:18px;height:18px}
.faq-icon::before,.faq-icon::after{
  content:"";position:absolute;background:var(--ink-3);border-radius:2px;transition:.2s var(--ease);
}
.faq-icon::before{left:0;right:0;top:8px;height:2px}
.faq-icon::after{top:0;bottom:0;left:8px;width:2px}
.faq-item.is-open .faq-icon::after{transform:scaleY(0)}
.faq-item.is-open .faq-q{color:var(--primary)}
.faq-a{max-height:0;overflow:hidden;transition:max-height .2s var(--ease)}
.faq-item.is-open .faq-a{max-height:420px}
.faq-a-inner{padding:0 4px 22px;border-left:3px solid transparent;padding-left:14px;transition:border-color .2s var(--ease)}
.faq-item.is-open .faq-a-inner{border-left-color:var(--primary)}
.faq-a-inner p{font-size:15px;line-height:1.8;color:var(--ink-2)}

/* ============ cta band ============ */
.cta-band{background:var(--night);color:#fff;padding:64px 0}
.cta-inner{
  display:flex;align-items:center;justify-content:space-between;gap:34px;flex-wrap:wrap;
  background:rgba(255,255,255,.05);border:1px solid rgba(255,255,255,.12);
  border-radius:20px;padding:40px;
}
.cta-inner h2{font-size:clamp(22px,2.6vw,30px);font-weight:800;line-height:1.4;color:#fff;max-width:24em}
.cta-inner p{margin-top:10px;font-size:14.5px;color:rgba(255,255,255,.68);line-height:1.75;max-width:34em}
.cta-actions{display:flex;gap:12px;flex-wrap:wrap}
.cta-note{margin-top:22px;font-size:12.5px;color:rgba(255,255,255,.5);line-height:1.8}

/* ============ footer ============ */
.site-footer{background:#1D1524;color:rgba(255,255,255,.7);padding:64px 0 0}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1.1fr;gap:36px}
.footer-brand .logo{color:#fff}
.footer-brand p{margin-top:16px;font-size:14px;line-height:1.8;color:rgba(255,255,255,.6);max-width:26em}
.footer-col h4{font-size:14px;font-weight:700;color:#fff;margin-bottom:16px;letter-spacing:.02em}
.footer-col ul{display:flex;flex-direction:column;gap:11px}
.footer-col a{font-size:14px;color:rgba(255,255,255,.62)}
.footer-col a:hover{color:#fff;text-decoration:underline;text-underline-offset:3px}
.footer-col li span{font-size:14px;color:rgba(255,255,255,.62)}
.footer-bottom{
  margin-top:48px;border-top:1px solid rgba(255,255,255,.1);
  padding:22px 0;display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;
  font-size:12.5px;color:rgba(255,255,255,.45);
}

/* ============ responsive ============ */
@media (max-width:1199px){
  .hero-grid{gap:40px}
  .reviews{grid-template-columns:repeat(3,1fr)}
}
@media (max-width:991px){
  .main-nav{display:none}
  .header-actions .btn-header{display:none}
  .menu-toggle{display:inline-flex}
  .header-inner{height:64px;gap:16px}
  .hero{padding:48px 0 60px}
  .hero-grid{grid-template-columns:1fr;gap:36px}
  .hero-media{max-width:560px}
  .split{grid-template-columns:1fr;gap:32px}
  .security-grid{grid-template-columns:1fr;gap:32px}
  .feature-grid{grid-template-columns:1fr}
  .fcard-side{grid-template-rows:auto auto}
  .stats{grid-template-columns:repeat(2,1fr)}
  .timeline{grid-template-columns:repeat(2,1fr);row-gap:32px}
  .timeline::before{display:none}
  .reviews{grid-template-columns:repeat(2,1fr)}
  .download-box{grid-template-columns:1fr;padding:30px}
  .news-grid{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px}
  .plans{grid-template-columns:1fr}
}
@media (max-width:767px){
  .container{padding:0 16px}
  .section{padding:44px 0}
  .section--dark{padding:48px 0}
  .hero h1{font-size:clamp(26px,7.4vw,32px)}
  .hero-sub{font-size:15.5px}
  .hero-actions .btn{width:100%;height:48px}
  .float-card{left:8px;bottom:-14px;padding:12px 14px;gap:10px}
  .float-card .fc-num{font-size:18px}
  .stats{gap:14px}
  .stat{padding:20px 16px}
  .stat-num{font-size:26px}
  .reviews{grid-template-columns:1fr}
  .timeline{grid-template-columns:1fr;row-gap:24px}
  .step{display:grid;grid-template-columns:54px 1fr;gap:16px;align-items:start}
  .step h3{margin-top:8px}
  .step p{margin-top:2px;grid-column:2}
  .news-head{flex-direction:column;align-items:flex-start;gap:12px}
  .cta-inner{padding:28px 22px;flex-direction:column;align-items:flex-start}
  .cta-actions{width:100%}
  .cta-actions .btn{width:100%;height:48px}
  .footer-grid{grid-template-columns:1fr}
  .footer-bottom{flex-direction:column;gap:8px}
  .run-card{flex:0 0 82%}
  .faq-q{font-size:15.5px;padding:18px 2px}
  .download-box{padding:24px}
}
@media (max-width:520px){
  .chip{width:100%;justify-content:flex-start}
  .stats{grid-template-columns:1fr}
  .logo{font-size:15.5px}
  .logo-mark{width:30px;height:30px;flex:0 0 30px;font-size:14px}
}

/* roulang page: category1 */
:root{
  --primary:#E24B3C;
  --primary-dark:#B7372C;
  --primary-soft:#FBE7E3;
  --night:#2A1E33;
  --night-2:#382843;
  --teal:#1E9E8A;
  --teal-soft:#E2F3F0;
  --gold:#F0B429;
  --bg:#FAF6F2;
  --bg-2:#F2EAE3;
  --line:#E7DCD4;
  --ink:#221826;
  --ink-2:#4A3B4F;
  --ink-3:#7C6E80;
  --white:#FFFFFF;
  --r-card:16px;
  --r-btn:10px;
  --r-img:14px;
  --sh-1:0 1px 2px rgba(34,24,38,.04);
  --sh-2:0 6px 18px rgba(34,24,38,.07);
  --sh-3:0 14px 32px rgba(34,24,38,.12);
  --ease:cubic-bezier(.32,.72,.36,1);
  --header-h:72px;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  font-family:-apple-system,"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Noto Sans SC",sans-serif;
  font-size:16px;
  line-height:1.75;
  color:var(--ink);
  background:var(--bg);
  -webkit-font-smoothing:antialiased;
  font-variant-numeric:tabular-nums;
}
img{max-width:100%;display:block;border:0}
a{color:inherit;text-decoration:none;transition:color .2s var(--ease)}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer}
h1,h2,h3,h4{margin:0;font-weight:800;letter-spacing:-.01em;color:var(--ink);line-height:1.32}
p{margin:0}
ul,ol{margin:0;padding:0;list-style:none}
.container{width:100%;max-width:1200px;margin:0 auto;padding:0 24px}
:focus-visible{outline:2px solid var(--primary);outline-offset:2px;border-radius:6px}

/* ============ header ============ */
.site-header{
  position:sticky;top:0;z-index:120;
  background:rgba(250,246,242,.9);
  -webkit-backdrop-filter:saturate(140%) blur(8px);
  backdrop-filter:saturate(140%) blur(8px);
  border-bottom:1px solid var(--line);
  transition:box-shadow .25s var(--ease);
}
.site-header.is-scrolled{box-shadow:var(--sh-2)}
.header-inner{display:flex;align-items:center;height:72px;gap:28px;transition:height .25s var(--ease)}
.site-header.is-scrolled .header-inner{height:60px}
.logo{display:inline-flex;align-items:center;gap:10px;font-weight:800;font-size:17px;letter-spacing:-.01em;color:var(--ink);white-space:nowrap}
.logo-mark{
  width:34px;height:34px;flex:0 0 34px;border-radius:11px;
  background:linear-gradient(135deg,var(--primary) 0%,#F0775F 100%);
  color:#fff;display:grid;place-items:center;font-size:16px;font-weight:800;
  box-shadow:0 4px 12px rgba(226,75,60,.28);
  transition:transform .2s var(--ease);
}
.logo:hover .logo-mark{transform:translateY(-1px)}
.main-nav{display:flex;align-items:center;gap:6px;margin-left:8px}
.main-nav a{position:relative;display:inline-block;padding:10px 12px;font-size:15px;color:var(--ink-2);border-radius:8px}
.main-nav a::after{content:"";position:absolute;left:12px;right:12px;bottom:4px;height:2px;background:transparent;border-radius:2px;transition:background .2s var(--ease)}
.main-nav a:hover{color:var(--primary)}
.main-nav a.is-active{color:var(--primary);font-weight:600}
.main-nav a.is-active::after{background:var(--primary)}
.header-actions{margin-left:auto;display:flex;align-items:center;gap:12px}

/* ============ buttons ============ */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:46px;padding:0 22px;border-radius:var(--r-btn);
  font-size:15px;font-weight:600;letter-spacing:.01em;
  transition:background .2s var(--ease),color .2s var(--ease),transform .15s var(--ease),box-shadow .2s var(--ease),border-color .2s var(--ease);
  border:1.5px solid transparent;
}
.btn-primary{background:var(--primary);color:#fff;box-shadow:0 6px 16px rgba(226,75,60,.24)}
.btn-primary:hover{background:var(--primary-dark);transform:translateY(-1px);box-shadow:0 10px 22px rgba(226,75,60,.3)}
.btn-ghost{background:transparent;color:var(--primary);border-color:var(--primary)}
.btn-ghost:hover{background:var(--primary);color:#fff;transform:translateY(-1px)}
.btn-sm{height:38px;padding:0 16px;font-size:14px}
.btn-block{width:100%}
.btn:active{transform:translateY(1px)}
.link-arrow{display:inline-flex;align-items:center;gap:6px;font-size:14px;font-weight:600;color:var(--primary)}
.link-arrow .arw{transition:transform .2s var(--ease)}
.link-arrow:hover .arw{transform:translateX(3px)}
.text-link{font-size:14px;color:var(--ink-2);border-bottom:1px solid var(--line);padding-bottom:1px}
.text-link:hover{color:var(--primary);border-color:var(--primary)}

/* ============ mobile drawer ============ */
.menu-toggle{display:none;width:42px;height:42px;border-radius:10px;border:1px solid var(--line);background:#fff;align-items:center;justify-content:center}
.menu-toggle span,.menu-toggle span::before,.menu-toggle span::after{content:"";display:block;width:18px;height:2px;background:var(--ink);border-radius:2px;transition:.2s var(--ease)}
.menu-toggle span::before{transform:translateY(-6px)}
.menu-toggle span::after{transform:translateY(4px)}
.drawer-mask{position:fixed;inset:0;background:rgba(34,24,38,.4);opacity:0;visibility:hidden;transition:opacity .25s var(--ease),visibility .25s;z-index:130}
.drawer-mask.is-open{opacity:1;visibility:visible}
.drawer{
  position:fixed;top:0;right:0;bottom:0;width:82%;max-width:340px;z-index:140;
  background:var(--bg);padding:24px 22px;transform:translateX(102%);
  transition:transform .28s var(--ease);box-shadow:var(--sh-3);
  display:flex;flex-direction:column;gap:20px;overflow-y:auto;
}
.drawer.is-open{transform:translateX(0)}
.drawer-head{display:flex;align-items:center;justify-content:space-between}
.drawer-close{width:38px;height:38px;border-radius:10px;border:1px solid var(--line);display:grid;place-items:center;font-size:18px;color:var(--ink-2);background:#fff}
.drawer-close:hover{color:var(--primary);border-color:var(--primary)}
.drawer-nav{display:flex;flex-direction:column;gap:4px}
.drawer-nav a{padding:13px 12px;border-radius:10px;font-size:15px;color:var(--ink-2);font-weight:500}
.drawer-nav a:hover,.drawer-nav a.is-active{background:var(--primary-soft);color:var(--primary)}

/* ============ 分类头部（矮版） ============ */
.cat-hero{padding:28px 0 24px;background:linear-gradient(160deg,#FFF9F4 0%,#FAF6F2 62%,#F5EBE2 100%);border-bottom:1px solid var(--line)}
.cat-hero-box{
  display:grid;grid-template-columns:minmax(0,1fr) 260px;gap:28px;align-items:center;
  background:#fff;border:1px solid var(--line);border-radius:var(--r-card);
  padding:22px 26px;box-shadow:var(--sh-1);
}
.crumb{display:flex;align-items:center;gap:8px;font-size:12.5px;color:var(--ink-3);margin-bottom:10px}
.crumb a:hover{color:var(--primary)}
.crumb-current{color:var(--primary);font-weight:600}
.cat-hero h1{font-size:clamp(26px,3.4vw,36px);margin-bottom:8px}
.cat-desc{font-size:15px;color:var(--ink-2);line-height:1.7}
.cat-tags{display:flex;flex-wrap:wrap;gap:8px;margin-top:14px}
.tag{
  display:inline-flex;align-items:center;height:28px;padding:0 12px;border-radius:999px;
  font-size:12.5px;font-weight:600;color:var(--teal);background:var(--teal-soft);
  border:1px solid rgba(30,158,138,.22);
}
.cat-hero-media{border-radius:var(--r-img);overflow:hidden;height:172px;background:var(--bg-2);border:1px solid var(--line)}
.cat-hero-media img{width:100%;height:100%;object-fit:cover}

/* ============ 筛选条 ============ */
.filter-bar{
  position:sticky;top:var(--header-h);z-index:90;
  background:rgba(242,234,227,.94);
  -webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px);
  border-bottom:1px solid var(--line);
  transition:top .25s var(--ease);
}
.filter-inner{display:flex;align-items:center;gap:16px;min-height:62px;flex-wrap:wrap;padding-top:10px;padding-bottom:10px}
.filter-left{display:flex;align-items:center;gap:8px;flex-wrap:wrap}
.filter-label{font-size:12.5px;color:var(--ink-3);font-weight:600;letter-spacing:.04em}
.chip{
  display:inline-flex;align-items:center;height:34px;padding:0 15px;border-radius:999px;
  font-size:13.5px;color:var(--ink-2);background:#fff;border:1px solid var(--line);
  transition:all .2s var(--ease);
}
.chip:hover{border-color:var(--primary);color:var(--primary)}
.chip.is-on{background:var(--primary);border-color:var(--primary);color:#fff;box-shadow:0 4px 12px rgba(226,75,60,.22)}
.filter-right{margin-left:auto;display:inline-flex;background:#fff;border:1px solid var(--line);border-radius:999px;padding:3px}
.sort{height:28px;padding:0 16px;border-radius:999px;font-size:13.5px;color:var(--ink-3);transition:all .2s var(--ease)}
.sort:hover{color:var(--primary)}
.sort.is-on{background:var(--night);color:#fff}

/* ============ 通用板块 ============ */
.section{padding:64px 0}
.section-alt{background:var(--bg-2);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:20px;margin-bottom:28px;flex-wrap:wrap}
.section-head h2{font-size:clamp(22px,2.6vw,30px)}
.section-head p{font-size:14px;color:var(--ink-3);margin-top:6px}
.section-head .link-arrow{flex:0 0 auto}

/* ============ 列表 ============ */
.post-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:24px}
.post-card{
  display:flex;flex-direction:column;background:#fff;border:1px solid var(--line);
  border-radius:var(--r-card);overflow:hidden;box-shadow:var(--sh-1);
  transition:transform .22s var(--ease),box-shadow .22s var(--ease),border-color .22s var(--ease);
}
.post-card:hover{transform:translateY(-4px);box-shadow:var(--sh-3);border-color:#DCCEC4}
.post-thumb{aspect-ratio:16/9;overflow:hidden;background:var(--bg-2);position:relative}
.post-thumb img{width:100%;height:100%;object-fit:cover;transition:transform .45s var(--ease)}
.post-card:hover .post-thumb img{transform:scale(1.04)}
.badge-cat{
  position:absolute;left:14px;top:14px;height:26px;padding:0 11px;border-radius:999px;
  display:inline-flex;align-items:center;font-size:12px;font-weight:600;
  background:rgba(42,30,51,.82);color:#fff;backdrop-filter:blur(4px);
}
.post-body{padding:20px;display:flex;flex-direction:column;gap:10px;flex:1}
.post-title{font-size:17px;font-weight:700;line-height:1.55;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.post-title a:hover{color:var(--primary)}
.post-excerpt{font-size:14px;color:var(--ink-2);line-height:1.7;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.post-meta{display:flex;align-items:center;gap:8px;font-size:12.5px;color:var(--ink-3);margin-top:auto;padding-top:6px}
.meta-dot{color:var(--line)}

/* ============ 要点速览 ============ */
.point-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:20px}
.point-card{
  background:#fff;border:1px solid var(--line);border-left:3px solid var(--teal);
  border-radius:12px;padding:20px 22px;transition:transform .2s var(--ease),box-shadow .2s var(--ease);
}
.point-card:hover{transform:translateY(-3px);box-shadow:var(--sh-2)}
.point-card h3{font-size:15.5px;margin-bottom:6px}
.point-card p{font-size:13.5px;color:var(--ink-2);line-height:1.7}

/* ============ 标签云 ============ */
.tag-cloud{display:flex;flex-wrap:wrap;gap:10px}
.tag-cloud span{
  display:inline-flex;align-items:center;height:36px;padding:0 16px;border-radius:999px;
  font-size:13.5px;color:var(--ink-2);background:#fff;border:1px solid var(--line);
  transition:all .2s var(--ease);cursor:default;
}
.tag-cloud span:hover{background:var(--primary);border-color:var(--primary);color:#fff;transform:translateY(-2px);box-shadow:0 6px 16px rgba(226,75,60,.22)}

/* ============ 精选小卡 ============ */
.pick-list{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:20px}
.pick-item{
  display:flex;gap:14px;align-items:flex-start;background:#fff;border:1px solid var(--line);
  border-radius:12px;padding:14px;transition:box-shadow .2s var(--ease),transform .2s var(--ease);
}
.pick-item:hover{transform:translateY(-3px);box-shadow:var(--sh-2)}
.pick-thumb{width:76px;height:76px;flex:0 0 76px;border-radius:10px;overflow:hidden;background:var(--bg-2)}
.pick-thumb img{width:100%;height:100%;object-fit:cover}
.pick-body h3{font-size:14.5px;line-height:1.5;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.pick-body h3 a:hover{color:var(--primary)}
.pick-body time{display:block;font-size:12px;color:var(--ink-3);margin-top:6px}

/* ============ FAQ ============ */
.faq-wrap{max-width:860px;margin:0 auto;border-top:1px solid var(--line)}
.faq-item{border-bottom:1px solid var(--line)}
.faq-q{
  position:relative;display:flex;align-items:center;justify-content:space-between;gap:16px;
  width:100%;text-align:left;padding:20px 4px 20px 18px;font-size:16px;font-weight:700;color:var(--ink);
  transition:color .2s var(--ease);
}
.faq-q::before{
  content:"";position:absolute;left:0;top:22px;bottom:22px;width:3px;border-radius:3px;
  background:var(--primary);transform:scaleY(0);transform-origin:top;transition:transform .2s var(--ease);
}
.faq-q:hover{color:var(--primary)}
.faq-icon{position:relative;width:16px;height:16px;flex:0 0 16px}
.faq-icon::before,.faq-icon::after{content:"";position:absolute;background:var(--primary);border-radius:2px;transition:transform .2s var(--ease)}
.faq-icon::before{left:0;top:7px;width:16px;height:2px}
.faq-icon::after{left:7px;top:0;width:2px;height:16px}
.faq-item.is-open .faq-icon::after{transform:scaleY(0)}
.faq-item.is-open .faq-q::before{transform:scaleY(1)}
.faq-a{max-height:0;overflow:hidden;transition:max-height .25s var(--ease)}
.faq-a p{padding:0 4px 22px 18px;font-size:15px;line-height:1.8;color:var(--ink-2)}
.faq-item.is-open .faq-a{max-height:320px}

/* ============ 列表底部 ============ */
.list-foot{display:flex;flex-direction:column;align-items:center;gap:14px;margin-top:36px}
.list-foot .text-link{font-size:14px}

/* ============ 空态 ============ */
.empty-state{text-align:center;padding:56px 20px;background:#fff;border:1px dashed var(--line);border-radius:var(--r-card)}
.empty-icon{width:44px;height:44px;margin:0 auto 14px;border-radius:12px;border:1.5px solid var(--line);position:relative}
.empty-icon::before,.empty-icon::after{content:"";position:absolute;background:var(--line)}
.empty-icon::before{left:12px;right:12px;top:15px;height:2px}
.empty-icon::after{left:12px;right:12px;top:23px;height:2px}
.empty-state p{font-size:14.5px;color:var(--ink-3);margin-bottom:18px}

/* ============ footer ============ */
.site-footer{background:var(--night);color:rgba(255,255,255,.72);padding:64px 0 26px;margin-top:0}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1fr;gap:36px}
.footer-brand .logo{color:#fff;margin-bottom:16px}
.footer-brand p{font-size:13.5px;line-height:1.85;color:rgba(255,255,255,.6);max-width:330px}
.footer-col h4{font-size:14px;color:#fff;font-weight:700;margin-bottom:16px;letter-spacing:.02em}
.footer-col ul{display:flex;flex-direction:column;gap:10px}
.footer-col a,.footer-col span{font-size:14px;color:rgba(255,255,255,.6);line-height:1.6}
.footer-col a:hover{color:#fff;text-decoration:underline}
.footer-bottom{
  margin-top:44px;padding-top:20px;border-top:1px solid rgba(255,255,255,.12);
  display:flex;justify-content:space-between;gap:14px;flex-wrap:wrap;
  font-size:12.5px;color:rgba(255,255,255,.45);
}

/* ============ 响应式 ============ */
@media (max-width:1199.98px){
  .footer-grid{grid-template-columns:1.2fr 1fr 1fr}
  .footer-brand{grid-column:1 / -1}
  .footer-brand p{max-width:none}
}
@media (max-width:991.98px){
  .main-nav{display:none}
  .menu-toggle{display:inline-flex}
  .header-actions .btn-sm{display:none}
  .cat-hero-box{grid-template-columns:1fr;gap:18px}
  .cat-hero-media{height:150px;order:-1}
  .post-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
  .point-grid{grid-template-columns:1fr}
  .pick-list{grid-template-columns:1fr}
  .filter-inner{min-height:auto;padding-top:12px;padding-bottom:12px}
  .filter-right{margin-left:0}
  .section{padding:48px 0}
}
@media (max-width:767.98px){
  .container{padding:0 16px}
  .header-inner{height:64px;gap:12px}
  .site-header.is-scrolled .header-inner{height:58px}
  .cat-hero{padding:18px 0 18px}
  .cat-hero-box{padding:18px}
  .cat-hero h1{font-size:clamp(22px,6vw,28px)}
  .post-grid{grid-template-columns:1fr;gap:18px}
  .section{padding:40px 0}
  .tag-cloud span{height:33px;padding:0 13px;font-size:13px}
  .footer-grid{grid-template-columns:1fr 1fr;gap:26px}
  .footer-brand{grid-column:1 / -1}
  .footer-bottom{flex-direction:column;gap:8px}
  .btn{height:48px}
  .btn-sm{height:38px}
  .filter-bar{top:var(--header-h)}
  .faq-q{font-size:15px;padding:16px 2px 16px 16px}
  .faq-a p{padding:0 2px 18px 16px;font-size:14.5px}
}
@media (max-width:519.98px){
  .footer-grid{grid-template-columns:1fr}
  .pick-thumb{width:64px;height:64px;flex:0 0 64px}
}

/* roulang page: article */
:root{
  --primary:#E24B3C;
  --primary-dark:#B7372C;
  --primary-soft:#FBE7E3;
  --night:#2A1E33;
  --night-2:#382843;
  --teal:#1E9E8A;
  --teal-soft:#E2F3F0;
  --gold:#F0B429;
  --bg:#FAF6F2;
  --bg-2:#F2EAE3;
  --line:#E7DCD4;
  --ink:#221826;
  --ink-2:#4A3B4F;
  --ink-3:#7C6E80;
  --white:#FFFFFF;
  --r-card:16px;
  --r-btn:10px;
  --r-img:14px;
  --sh-1:0 1px 2px rgba(34,24,38,.04);
  --sh-2:0 6px 18px rgba(34,24,38,.07);
  --sh-3:0 14px 32px rgba(34,24,38,.12);
  --ease:cubic-bezier(.32,.72,.36,1);
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  font-family:-apple-system,"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Noto Sans SC",sans-serif;
  font-size:16px;
  line-height:1.75;
  color:var(--ink);
  background:var(--bg);
  -webkit-font-smoothing:antialiased;
  font-variant-numeric:tabular-nums;
}
h1,h2,h3,h4,h5,p,ul,ol,figure,blockquote{margin:0}
ul,ol{padding:0;list-style:none}
img{max-width:100%;display:block;border:0}
a{color:inherit;text-decoration:none;transition:color .2s var(--ease)}
a:hover{color:var(--primary)}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer}
:focus-visible{outline:2px solid var(--primary);outline-offset:2px;border-radius:6px}
.container{width:100%;max-width:1200px;margin:0 auto;padding:0 24px}

/* ============ header ============ */
.site-header{
  position:sticky;top:0;z-index:120;
  background:rgba(250,246,242,.92);
  -webkit-backdrop-filter:saturate(140%) blur(8px);
  backdrop-filter:saturate(140%) blur(8px);
  border-bottom:1px solid var(--line);
  transition:box-shadow .25s var(--ease);
}
.site-header.is-scrolled{box-shadow:var(--sh-2)}
.header-inner{display:flex;align-items:center;height:72px;gap:28px;transition:height .25s var(--ease)}
.site-header.is-scrolled .header-inner{height:60px}
.logo{display:inline-flex;align-items:center;gap:10px;font-weight:800;font-size:17px;letter-spacing:-.01em;color:var(--ink);white-space:nowrap}
.logo-mark{
  width:34px;height:34px;flex:0 0 34px;border-radius:11px;
  background:linear-gradient(135deg,var(--primary) 0%,#F0775F 100%);
  color:#fff;display:grid;place-items:center;font-size:16px;font-weight:800;
  box-shadow:0 4px 12px rgba(226,75,60,.28);
  transition:transform .2s var(--ease);
}
.logo:hover .logo-mark{transform:translateY(-1px)}
.main-nav{display:flex;align-items:center;gap:6px;margin-left:8px}
.main-nav a{position:relative;display:inline-block;padding:10px 12px;font-size:15px;color:var(--ink-2);border-radius:8px}
.main-nav a::after{content:"";position:absolute;left:12px;right:12px;bottom:4px;height:2px;background:transparent;border-radius:2px;transition:background .2s var(--ease)}
.main-nav a:hover{color:var(--primary)}
.main-nav a.is-active{color:var(--primary);font-weight:600}
.main-nav a.is-active::after{background:var(--primary)}
.header-actions{margin-left:auto;display:flex;align-items:center;gap:12px}

/* ============ buttons ============ */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:46px;padding:0 22px;border-radius:var(--r-btn);
  font-size:15px;font-weight:600;letter-spacing:.01em;line-height:1;
  border:1.5px solid transparent;
  transition:background .2s var(--ease),color .2s var(--ease),transform .15s var(--ease),box-shadow .2s var(--ease),border-color .2s var(--ease);
}
.btn-primary{background:var(--primary);color:#fff;box-shadow:0 6px 16px rgba(226,75,60,.24)}
.btn-primary:hover{background:var(--primary-dark);color:#fff;transform:translateY(-1px);box-shadow:0 10px 22px rgba(226,75,60,.3)}
.btn-ghost{background:transparent;color:var(--primary);border-color:var(--primary)}
.btn-ghost:hover{background:var(--primary);color:#fff;transform:translateY(-1px)}
.btn-sm{height:38px;padding:0 16px;font-size:14px}
.btn-block{width:100%}
.btn:active{transform:translateY(1px)}
.link-arrow{display:inline-flex;align-items:center;gap:6px;font-size:14px;font-weight:600;color:var(--primary)}
.link-arrow .arw{transition:transform .2s var(--ease)}
.link-arrow:hover .arw{transform:translateX(3px)}

/* ============ mobile drawer ============ */
.menu-toggle{display:none;width:42px;height:42px;border-radius:10px;border:1px solid var(--line);background:#fff;align-items:center;justify-content:center}
.menu-toggle span,.menu-toggle span::before,.menu-toggle span::after{content:"";display:block;width:18px;height:2px;background:var(--ink);border-radius:2px;transition:.2s var(--ease)}
.menu-toggle span::before{transform:translateY(-6px)}
.menu-toggle span::after{transform:translateY(4px)}
.drawer-mask{position:fixed;inset:0;background:rgba(34,24,38,.4);opacity:0;visibility:hidden;transition:opacity .25s var(--ease),visibility .25s;z-index:130}
.drawer-mask.is-open{opacity:1;visibility:visible}
.drawer{
  position:fixed;top:0;right:0;bottom:0;width:82%;max-width:340px;z-index:140;
  background:var(--bg);padding:24px 22px;transform:translateX(102%);
  transition:transform .28s var(--ease);box-shadow:var(--sh-3);
  display:flex;flex-direction:column;gap:20px;overflow-y:auto;
}
.drawer.is-open{transform:translateX(0)}
.drawer-head{display:flex;align-items:center;justify-content:space-between}
.drawer-close{width:38px;height:38px;border-radius:10px;border:1px solid var(--line);display:grid;place-items:center;font-size:20px;color:var(--ink-2);background:#fff}
.drawer-nav{display:flex;flex-direction:column;gap:4px}
.drawer-nav a{padding:13px 12px;border-radius:10px;font-size:15px;color:var(--ink-2);font-weight:500}
.drawer-nav a:hover,.drawer-nav a.is-active{background:var(--primary-soft);color:var(--primary)}

/* ============ article topbar ============ */
.article-topbar{background:var(--bg-2);border-bottom:1px solid var(--line);padding:20px 0 18px}
.breadcrumb{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13.5px;color:var(--ink-3)}
.breadcrumb a{color:var(--ink-2)}
.breadcrumb a:hover{color:var(--primary)}
.breadcrumb .sep{color:#C9BAB0}
.breadcrumb .current{color:var(--primary);font-weight:600;max-width:520px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.meta-strip{display:flex;flex-wrap:wrap;align-items:center;gap:12px;margin-top:14px}
.cat-badge{display:inline-flex;align-items:center;height:28px;padding:0 14px;border-radius:999px;background:var(--primary-soft);color:var(--primary);font-size:13px;font-weight:600}
.cat-badge.is-teal{background:var(--teal-soft);color:var(--teal)}
.meta-chip{display:inline-flex;align-items:center;gap:6px;font-size:13px;color:var(--ink-3)}
.meta-chip::before{content:"";width:5px;height:5px;border-radius:50%;background:#D3C3BA}

/* ============ article head ============ */
.article-head{padding:44px 0 36px;background:linear-gradient(180deg,#FFF9F4 0%,var(--bg) 100%);border-bottom:1px solid var(--line)}
.article-head h1{
  font-size:clamp(28px,3.6vw,42px);font-weight:800;letter-spacing:-.01em;line-height:1.35;
  color:var(--ink);max-width:900px;
}
.article-sub{margin-top:16px;font-size:16px;color:var(--ink-2);max-width:760px;line-height:1.8}
.article-meta-row{
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:16px;
  margin-top:26px;padding-top:20px;border-top:1px dashed var(--line);
}
.meta-list{display:flex;flex-wrap:wrap;align-items:center;gap:18px;font-size:13.5px;color:var(--ink-3)}
.meta-list b{color:var(--ink-2);font-weight:600}
.share-group{display:flex;align-items:center;gap:8px}
.share-btn{
  height:34px;padding:0 14px;border-radius:999px;border:1px solid var(--line);
  background:#fff;font-size:13px;color:var(--ink-2);
  transition:all .2s var(--ease);
}
.share-btn:hover{border-color:var(--primary);color:var(--primary);background:var(--primary-soft)}
.share-btn:active{transform:translateY(1px)}
.share-btn.is-copied{border-color:var(--teal);color:var(--teal);background:var(--teal-soft)}

/* ============ layout ============ */
.article-main{padding:56px 0 72px;background:var(--bg)}
.article-layout{display:grid;grid-template-columns:minmax(0,1fr) 320px;gap:44px;align-items:start}
.article-primary{min-width:0}

/* key points */
.key-points{
  border:1px solid var(--line);background:#fff;border-radius:var(--r-card);
  padding:26px 28px;box-shadow:var(--sh-1);margin-bottom:34px;
  border-left:4px solid var(--primary);
}
.key-points h2{font-size:18px;font-weight:800;color:var(--ink);margin-bottom:14px;letter-spacing:-.01em}
.key-points ul{display:grid;gap:10px}
.key-points li{position:relative;padding-left:22px;font-size:14.5px;color:var(--ink-2);line-height:1.75}
.key-points li::before{
  content:"";position:absolute;left:0;top:9px;width:9px;height:9px;border-radius:50%;
  background:var(--teal-soft);border:2px solid var(--teal);
}

/* article body typography */
.article-body{font-size:16px;line-height:1.9;color:var(--ink-2);word-break:break-word}
.article-body p{font-size:16px;line-height:1.9;margin:0 0 18px}
.article-body h2{
  position:relative;font-size:24px;font-weight:800;color:var(--ink);letter-spacing:-.01em;
  line-height:1.5;margin:38px 0 16px;padding-left:14px;
  border-left:4px solid var(--primary);
}
.article-body h3{font-size:20px;font-weight:800;color:var(--ink);line-height:1.6;margin:28px 0 12px}
.article-body h4{font-size:17px;font-weight:700;color:var(--ink);margin:22px 0 10px}
.article-body ul,.article-body ol{margin:0 0 20px;padding-left:2px;display:grid;gap:8px}
.article-body ul>li{position:relative;padding-left:20px;line-height:1.85}
.article-body ul>li::before{content:"";position:absolute;left:2px;top:11px;width:7px;height:7px;border-radius:50%;background:var(--primary);opacity:.75}
.article-body ol{list-style:none;counter-reset:artnum}
.article-body ol>li{position:relative;padding-left:28px;counter-increment:artnum;line-height:1.85}
.article-body ol>li::before{
  content:counter(artnum);position:absolute;left:0;top:2px;width:20px;height:20px;border-radius:50%;
  background:var(--teal-soft);color:var(--teal);font-size:12px;font-weight:700;display:grid;place-items:center;
}
.article-body blockquote{
  margin:24px 0;padding:18px 22px;border-left:3px solid var(--primary);
  background:var(--bg-2);border-radius:0 12px 12px 0;color:var(--ink-2);font-style:normal;
}
.article-body blockquote p:last-child{margin-bottom:0}
.article-body img{border-radius:12px;margin:24px auto;box-shadow:var(--sh-1)}
.article-body figure{margin:24px 0}
.article-body figcaption{font-size:13px;color:var(--ink-3);text-align:center;margin-top:10px}
.article-body code{
  background:var(--bg-2);color:var(--primary-dark);border-radius:6px;padding:2px 7px;
  font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;font-size:14px;
}
.article-body pre{background:#2A1E33;color:#F6EFE9;border-radius:12px;padding:18px 20px;overflow-x:auto;margin:22px 0}
.article-body pre code{background:none;color:inherit;padding:0}
.article-body table{
  display:block;overflow-x:auto;width:100%;min-width:0;margin:22px 0;
  border:1px solid var(--line);border-radius:12px;background:#fff;
  border-collapse:collapse;font-size:14.5px;
}
.article-body th,.article-body td{padding:12px 16px;text-align:left;border-bottom:1px solid var(--line);white-space:nowrap}
.article-body th{background:var(--bg-2);font-weight:700;color:var(--ink)}
.article-body tr:last-child td{border-bottom:0}
.article-body a{color:var(--primary);text-decoration:underline;text-underline-offset:3px}
.article-body a:hover{color:var(--primary-dark)}
.article-body hr{border:0;border-top:1px dashed var(--line);margin:32px 0}

/* empty state */
.empty-state{text-align:center;padding:56px 20px;border:1px dashed var(--line);border-radius:var(--r-card);background:#fff}
.empty-state .empty-icon{width:56px;height:56px;margin:0 auto 16px;border-radius:16px;border:1.5px solid var(--line);display:grid;place-items:center;color:var(--ink-3);font-size:24px}
.empty-state p{font-size:16px;color:var(--ink-2);margin-bottom:18px}

/* ============ sidebar ============ */
.article-side{position:sticky;top:96px;display:flex;flex-direction:column;gap:20px}
.side-card{background:#fff;border:1px solid var(--line);border-radius:var(--r-card);padding:22px;box-shadow:var(--sh-1)}
.side-title{display:flex;align-items:center;gap:8px;font-size:15px;font-weight:800;color:var(--ink);margin-bottom:14px}
.side-title::before{content:"";width:4px;height:15px;border-radius:2px;background:var(--primary)}
.toc-list{display:flex;flex-direction:column;gap:2px;max-height:320px;overflow-y:auto}
.toc-link{
  display:block;font-size:13.5px;color:var(--ink-2);padding:7px 10px;border-radius:8px;
  border-left:2px solid transparent;line-height:1.6;
  transition:all .18s var(--ease);
}
.toc-link.is-sub{padding-left:22px;font-size:13px;color:var(--ink-3)}
.toc-link:hover{background:var(--primary-soft);color:var(--primary);border-left-color:var(--primary)}
.hot-list{display:flex;flex-direction:column;gap:14px}
.hot-list li{display:flex;gap:10px;align-items:flex-start}
.hot-num{
  flex:0 0 22px;width:22px;height:22px;border-radius:7px;display:grid;place-items:center;
  font-size:12px;font-weight:800;background:var(--bg-2);color:var(--ink-3);margin-top:2px;
}
.hot-list li:nth-child(1) .hot-num{background:var(--primary);color:#fff}
.hot-list li:nth-child(2) .hot-num{background:var(--primary-soft);color:var(--primary)}
.hot-list li:nth-child(3) .hot-num{background:var(--teal-soft);color:var(--teal)}
.hot-list a{font-size:14px;color:var(--ink-2);line-height:1.65;display:block}
.hot-list a:hover{color:var(--primary)}
.hot-meta{display:block;font-size:12px;color:var(--ink-3);margin-top:4px}
.side-cta{display:flex;flex-direction:column;gap:10px;background:var(--night);border-radius:var(--r-card);padding:22px;color:#fff}
.side-cta h3{font-size:16px;font-weight:800;line-height:1.5}
.side-cta p{font-size:13px;color:rgba(255,255,255,.68);line-height:1.7}
.side-cta .btn-ghost{color:#fff;border-color:rgba(255,255,255,.45)}
.side-cta .btn-ghost:hover{background:#fff;color:var(--night);border-color:#fff}

/* ============ related ============ */
.related-section{padding:64px 0;background:var(--bg-2);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.section-head{display:flex;flex-wrap:wrap;align-items:flex-end;justify-content:space-between;gap:14px;margin-bottom:28px}
.section-head h2{font-size:clamp(22px,2.4vw,28px);font-weight:800;letter-spacing:-.01em;color:var(--ink)}
.section-head p{font-size:14px;color:var(--ink-3);margin-top:6px}
.related-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:24px}
.related-card{
  background:#fff;border:1px solid var(--line);border-radius:var(--r-card);overflow:hidden;
  box-shadow:var(--sh-1);transition:transform .25s var(--ease),box-shadow .25s var(--ease);
  display:flex;flex-direction:column;
}
.related-card:hover{transform:translateY(-4px);box-shadow:var(--sh-3)}
.related-thumb{position:relative;aspect-ratio:16/9;overflow:hidden;background:var(--bg-2)}
.related-thumb img{width:100%;height:100%;object-fit:cover;transition:transform .4s var(--ease)}
.related-card:hover .related-thumb img{transform:scale(1.04)}
.related-body{padding:18px 20px 20px}
.related-body h3{font-size:16px;font-weight:700;line-height:1.55;color:var(--ink);display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.related-body .rel-meta{margin-top:10px;font-size:12.5px;color:var(--ink-3);display:flex;align-items:center;gap:8px}
.tag-mini{display:inline-block;padding:2px 9px;border-radius:999px;background:var(--primary-soft);color:var(--primary);font-size:11.5px;font-weight:600}

/* ============ prev / next ============ */
.article-foot{padding:56px 0 72px;background:var(--bg)}
.pager-grid{display:grid;grid-template-columns:1fr 1fr;gap:20px}
.pager-item{
  display:flex;flex-direction:column;gap:8px;background:#fff;border:1px solid var(--line);
  border-radius:var(--r-card);padding:20px 22px;box-shadow:var(--sh-1);
  transition:transform .22s var(--ease),box-shadow .22s var(--ease),border-color .22s var(--ease);
}
.pager-item:hover{transform:translateY(-3px);box-shadow:var(--sh-2);border-color:#DCCCC2}
.pager-item .pager-label{display:inline-flex;align-items:center;gap:6px;font-size:12.5px;color:var(--ink-3);font-weight:600}
.pager-item strong{font-size:15.5px;font-weight:700;color:var(--ink);line-height:1.6}
.pager-item.next{align-items:flex-end;text-align:right}
.pager-back{margin-top:22px;font-size:14px;color:var(--ink-3);text-align:center}
.pager-back a{color:var(--primary);font-weight:600;border-bottom:1px solid transparent}
.pager-back a:hover{border-bottom-color:var(--primary)}

/* ============ footer ============ */
.site-footer{background:var(--night);color:rgba(255,255,255,.72);padding:64px 0 26px;margin-top:0}
.footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1fr;gap:36px}
.footer-brand .logo{color:#fff;margin-bottom:16px}
.footer-brand .logo-mark{background:linear-gradient(135deg,var(--primary) 0%,#F0775F 100%)}
.footer-brand p{font-size:14px;line-height:1.85;color:rgba(255,255,255,.6);max-width:340px}
.footer-col h4{font-size:14px;font-weight:700;color:#fff;margin-bottom:16px}
.footer-col ul{display:flex;flex-direction:column;gap:11px}
.footer-col a,.footer-col span{font-size:14px;color:rgba(255,255,255,.62);line-height:1.6}
.footer-col a:hover{color:#fff;text-decoration:underline}
.footer-bottom{
  margin-top:44px;padding-top:20px;border-top:1px solid rgba(255,255,255,.12);
  display:flex;flex-wrap:wrap;justify-content:space-between;gap:10px;
  font-size:12.5px;color:rgba(255,255,255,.45);
}

/* ============ responsive ============ */
@media (max-width:1199px){
  .article-layout{grid-template-columns:minmax(0,1fr) 290px;gap:32px}
}
@media (max-width:991px){
  .main-nav{display:none}
  .menu-toggle{display:flex}
  .header-actions .btn-sm{display:none}
  .article-layout{grid-template-columns:1fr}
  .article-side{position:static;top:auto}
  .related-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
  .footer-grid{grid-template-columns:1fr 1fr;gap:30px}
}
@media (max-width:767px){
  .container{padding:0 16px}
  .header-inner{height:62px}
  .article-topbar{padding:16px 0}
  .article-head{padding:32px 0 28px}
  .article-main{padding:36px 0 48px}
  .article-body h2{font-size:21px;margin-top:30px}
  .article-body h3{font-size:18px}
  .key-points{padding:20px 18px}
  .related-section{padding:44px 0}
  .related-grid{grid-template-columns:1fr}
  .pager-grid{grid-template-columns:1fr}
  .pager-item.next{align-items:flex-start;text-align:left}
  .article-foot{padding:40px 0 52px}
  .footer-grid{grid-template-columns:1fr;gap:26px}
  .footer-bottom{flex-direction:column}
  .meta-list{gap:12px}
  .breadcrumb .current{max-width:200px}
  .share-btn{padding:0 12px}
}
@media (max-width:520px){
  .article-head h1{font-size:26px}
  .meta-strip{gap:8px}
  .article-body p,.article-body{font-size:15.5px}
}