/* roulang page: index */
:root{
  --paper:#F7F4EF;
  --sand:#EFE9E0;
  --ink:#141210;
  --muted:#6B655C;
  --line:#DED7CB;
  --lime:#C8F04B;
  --violet:#6E6273;
  --r:14px;
  --r-lg:20px;
  --shadow:0 12px 32px rgba(20,18,16,.10);
  --ease:cubic-bezier(.2,.7,.3,1);
  --wrap:1200px;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;
  background:var(--paper);
  color:var(--ink);
  font-family:system-ui,"Noto Sans SC","PingFang SC","Microsoft YaHei",sans-serif;
  font-size:16px;
  line-height:1.85;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}
img{display:block;max-width:100%;height:auto}
a{color:inherit;text-decoration:none}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer}
ul,ol{margin:0;padding:0;list-style:none}
p{margin:0}
h1,h2,h3,h4{margin:0;font-weight:700;letter-spacing:-.02em;line-height:1.25}
:focus-visible{outline:2px solid var(--violet);outline-offset:3px;border-radius:6px}
.wrap{width:100%;max-width:var(--wrap);margin:0 auto;padding:0 20px}
@media(min-width:1024px){.wrap{padding:0 40px}}
.num{font-variant-numeric:tabular-nums}

/* ============ header / nav ============ */
.site-header{
  position:sticky;top:0;z-index:80;
  background:rgba(247,244,239,.92);
  backdrop-filter:saturate(180%) blur(12px);
  border-bottom:1px solid transparent;
  transition:border-color .24s var(--ease),background .24s var(--ease);
}
.site-header.scrolled{border-bottom-color:var(--line);background:rgba(247,244,239,.97)}
.head-inner{display:flex;align-items:center;gap:18px;height:72px;transition:height .24s var(--ease)}
.site-header.scrolled .head-inner{height:60px}
.brand{display:flex;flex-direction:column;line-height:1.1;flex-shrink:0}
.brand-name{font-size:17px;font-weight:800;letter-spacing:-.03em}
.brand-name em{font-style:normal;color:var(--violet)}
.brand-sub{font-size:11px;letter-spacing:.16em;color:var(--muted);margin-top:4px}
.nav-main{display:none;align-items:center;gap:6px;margin-left:14px}
@media(min-width:768px){.nav-main{display:flex}}
.nav-link{
  position:relative;padding:8px 12px;font-size:14.5px;font-weight:600;color:#3A352E;
  border-radius:8px;transition:color .2s var(--ease),background .2s var(--ease);
}
.nav-link::after{
  content:"";position:absolute;left:12px;right:12px;bottom:2px;height:2px;
  background:var(--lime);transform:scaleX(0);transform-origin:left;
  transition:transform .24s var(--ease);
}
.nav-link:hover{color:var(--ink)}
.nav-link:hover::after{transform:scaleX(1)}
.nav-link.active{color:var(--ink)}
.nav-link.active::after{transform:scaleX(1)}
.head-right{position:relative;display:flex;align-items:center;gap:10px;margin-left:auto}
.hot-btn{
  display:none;align-items:center;gap:8px;font-size:14px;font-weight:600;
  padding:8px 12px;border-radius:8px;color:#3A352E;transition:background .2s var(--ease),color .2s var(--ease);
}
@media(min-width:768px){.hot-btn{display:inline-flex}}
.hot-btn:hover{background:var(--sand);color:var(--ink)}
.hot-dot{width:6px;height:6px;border-radius:50%;background:var(--lime);box-shadow:0 0 0 3px rgba(200,240,75,.28)}
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:13px 26px;border-radius:999px;font-size:15px;font-weight:700;
  transition:background .22s var(--ease),color .22s var(--ease),border-color .22s var(--ease),transform .22s var(--ease);
  white-space:nowrap;
}
.btn:active{transform:translateY(1px)}
.btn-primary{background:var(--ink);color:var(--paper);border:1px solid var(--ink)}
.btn-primary:hover{background:var(--lime);color:var(--ink);border-color:var(--lime)}
.btn-ghost{background:transparent;color:var(--ink);border:1px solid rgba(20,18,16,.55);border-radius:10px}
.btn-ghost:hover{background:var(--ink);color:var(--paper);border-color:var(--ink)}
.btn-sm{padding:9px 18px;font-size:13.5px;border-radius:999px}
.btn-light{background:var(--paper);color:var(--ink);border:1px solid var(--paper)}
.btn-light:hover{background:var(--lime);border-color:var(--lime)}
.btn-outline-light{background:transparent;color:var(--paper);border:1px solid rgba(247,244,239,.4);border-radius:10px}
.btn-outline-light:hover{background:var(--paper);color:var(--ink);border-color:var(--paper)}
.link-arrow{display:inline-flex;align-items:center;gap:6px;font-size:14px;font-weight:700;color:var(--ink)}
.link-arrow svg{transition:transform .22s var(--ease)}
.link-arrow:hover svg{transform:translateX(3px)}
.link-arrow:hover{color:var(--violet)}

/* mega panel */
.mega-panel{
  position:absolute;top:calc(100% + 12px);right:0;
  width:min(680px,calc(100vw - 32px));
  background:var(--paper);border:1px solid var(--line);border-radius:var(--r-lg);
  box-shadow:var(--shadow);padding:22px;
  display:grid;grid-template-columns:1.35fr .95fr;gap:22px;
  opacity:0;visibility:hidden;transform:translateY(8px);
  transition:opacity .16s var(--ease),transform .16s var(--ease),visibility .16s;
}
.head-right:hover .mega-panel,
.head-right:focus-within .mega-panel,
.mega-panel.is-open{opacity:1;visibility:visible;transform:translateY(0)}
.mega-col-title{font-size:11px;letter-spacing:.18em;color:var(--muted);margin-bottom:10px}
.mega-item{display:flex;gap:10px;padding:10px;border-radius:10px;transition:background .2s var(--ease)}
.mega-item:hover{background:var(--sand)}
.mega-item b{display:block;font-size:14px;line-height:1.4}
.mega-item span{display:block;font-size:12.5px;color:var(--muted);line-height:1.5;margin-top:2px}
.mega-card{background:var(--sand);border:1px solid var(--line);border-radius:var(--r);overflow:hidden}
.mega-card img{width:100%;aspect-ratio:4/3;object-fit:cover}
.mega-card-body{padding:12px 14px}
.mega-card-body b{font-size:14px;display:block}
.mega-card-body span{font-size:12.5px;color:var(--muted)}
.menu-btn{display:inline-flex;flex-direction:column;justify-content:center;gap:5px;width:42px;height:42px;border:1px solid var(--line);border-radius:10px;align-items:center}
@media(min-width:768px){.menu-btn{display:none}}
.menu-btn i{display:block;width:18px;height:2px;background:var(--ink);transition:transform .24s var(--ease),opacity .24s var(--ease)}
.menu-btn.is-open i:nth-child(1){transform:translateY(7px) rotate(45deg)}
.menu-btn.is-open i:nth-child(2){opacity:0}
.menu-btn.is-open i:nth-child(3){transform:translateY(-7px) rotate(-45deg)}
.drawer{
  display:none;border-top:1px solid var(--line);background:var(--paper);
  padding:18px 20px 26px;
}
.drawer.is-open{display:block}
.drawer-group{margin-bottom:16px}
.drawer-group h4{font-size:11px;letter-spacing:.18em;color:var(--muted);margin-bottom:8px}
.drawer-group a{display:block;padding:9px 0;font-size:15px;font-weight:600;border-bottom:1px solid var(--line)}
.drawer-group a:hover{color:var(--violet)}

/* ============ section base ============ */
.sec{padding:64px 0}
@media(min-width:1024px){.sec{padding:96px 0}}
.sec-sand{background:var(--sand)}
.sec-dark{
  background:var(--ink);color:var(--paper);
  border-top:1px solid rgba(247,244,239,.10);
  border-bottom:1px solid rgba(247,244,239,.10);
}
.sec-dark .sec-lead,.sec-dark .eyebrow{color:#B7B1A6}
.sec-head{display:flex;flex-wrap:wrap;gap:18px;align-items:flex-end;justify-content:space-between;margin-bottom:36px}
.eyebrow{display:inline-flex;align-items:center;gap:10px;font-size:12px;letter-spacing:.18em;color:var(--muted);text-transform:uppercase}
.eyebrow::before{content:"";width:24px;height:2px;background:var(--lime);flex-shrink:0}
.sec-title{font-size:clamp(25px,3.2vw,38px);letter-spacing:-.025em;margin-top:12px;max-width:24ch}
.sec-lead{color:var(--muted);max-width:64ch;margin-top:14px;font-size:15.5px}

/* ============ hero ============ */
.hero{padding:48px 0 64px;position:relative;overflow:hidden}
@media(min-width:1024px){.hero{padding:64px 0 88px}}
.hero-grid{display:grid;gap:36px;align-items:start}
@media(min-width:1024px){.hero-grid{grid-template-columns:7fr 5fr;gap:52px}}
.hero h1{font-size:clamp(33px,4.9vw,60px);line-height:1.06;letter-spacing:-.035em;margin-top:18px;max-width:19ch}
.hero h1 em{font-style:normal;position:relative;white-space:nowrap}
.hero h1 em::after{content:"";position:absolute;left:0;right:0;bottom:4px;height:8px;background:rgba(200,240,75,.55);z-index:-1;border-radius:2px}
.hero-lead{margin-top:20px;max-width:56ch;color:#4A453D;font-size:15.8px}
.hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:28px}
.trust-row{display:flex;flex-wrap:wrap;gap:10px;margin-top:26px}
.trust-chip{
  display:inline-flex;align-items:center;gap:7px;font-size:12.5px;font-weight:600;
  padding:7px 14px;border:1px solid var(--line);border-radius:999px;background:rgba(255,255,255,.55);
}
.trust-chip i{width:6px;height:6px;border-radius:50%;background:var(--lime);flex-shrink:0}
.portal{
  background:#fff;border:1px solid var(--line);border-radius:var(--r-lg);
  padding:14px;box-shadow:0 1px 0 rgba(20,18,16,.03);
}
.portal-media{position:relative;border-radius:var(--r);overflow:hidden}
.portal-media img{width:100%;aspect-ratio:16/10;object-fit:cover;transition:transform .5s var(--ease)}
.portal:hover .portal-media img{transform:scale(1.04)}
.portal-stat{
  position:absolute;left:12px;bottom:12px;background:rgba(20,18,16,.86);
  color:var(--paper);border-radius:12px;padding:10px 14px;display:flex;align-items:center;gap:10px;
}
.portal-stat b{font-size:22px;color:var(--lime);line-height:1;font-variant-numeric:tabular-nums}
.portal-stat span{font-size:11.5px;color:#C9C3B8;line-height:1.35;max-width:8em}
.portal-grid{display:grid;grid-template-columns:1fr 1fr;gap:10px;margin-top:12px}
.portal-item{
  display:block;padding:13px 14px;border:1px solid var(--line);border-radius:12px;
  background:var(--paper);transition:border-color .22s var(--ease),transform .22s var(--ease),box-shadow .22s var(--ease);
}
.portal-item:hover{border-color:var(--ink);transform:translateY(-3px);box-shadow:var(--shadow)}
.portal-item b{display:block;font-size:14px}
.portal-item span{display:block;font-size:12px;color:var(--muted);line-height:1.5;margin-top:2px}

/* ============ metrics ============ */
.metric-grid{display:grid;grid-template-columns:1fr 1fr;gap:16px;margin-top:34px}
@media(min-width:900px){.metric-grid{grid-template-columns:repeat(4,1fr);gap:22px}}
.metric{border-top:1px solid rgba(247,244,239,.18);padding-top:16px}
.metric b{display:block;font-size:clamp(32px,4vw,48px);line-height:1;font-weight:800;color:var(--lime);letter-spacing:-.04em;font-variant-numeric:tabular-nums;transition:opacity .2s var(--ease)}
.metric:hover b{opacity:.82}
.metric b small{font-size:14px;color:#B7B1A6;font-weight:600;margin-left:6px;letter-spacing:0}
.metric p{font-size:13px;color:#B7B1A6;margin-top:10px;line-height:1.7}
.metric-note{font-size:12px;color:#8B857A;margin-top:26px;text-align:right}

/* ============ service matrix ============ */
.matrix{display:grid;gap:16px;grid-template-columns:1fr}
@media(min-width:768px){.matrix{grid-template-columns:1fr 1fr}}
@media(min-width:1024px){
  .matrix{grid-template-columns:repeat(4,1fr);grid-template-rows:auto auto}
  .m-card.big{grid-column:span 2;grid-row:span 2}
}
.m-card{
  background:#fff;border:1px solid var(--line);border-radius:var(--r);
  padding:22px;display:flex;flex-direction:column;gap:10px;
  transition:transform .22s var(--ease),box-shadow .22s var(--ease),border-color .22s var(--ease);
}
.m-card:hover{transform:translateY(-4px);border-color:var(--ink);box-shadow:var(--shadow)}
.m-card.big{padding:0;overflow:hidden;gap:0}
.m-card.big img{width:100%;aspect-ratio:16/9;object-fit:cover;transition:transform .5s var(--ease)}
.m-card.big:hover img{transform:scale(1.04)}
.m-card.big .m-body{padding:22px;display:flex;flex-direction:column;gap:12px}
.icon-box{
  width:38px;height:38px;border-radius:10px;display:grid;place-items:center;
  background:var(--sand);color:var(--ink);border:1px solid var(--line);flex-shrink:0;
}
.m-card h3{font-size:17px}
.m-card p{font-size:14px;color:var(--muted);line-height:1.75}
.m-list{display:flex;flex-direction:column;gap:7px;margin-top:2px}
.m-list li{font-size:13.5px;color:#4A453D;padding-left:16px;position:relative}
.m-list li::before{content:"";position:absolute;left:0;top:.72em;width:8px;height:1px;background:var(--lime)}

/* ============ compare ============ */
.compare{display:grid;gap:18px;align-items:start}
@media(min-width:900px){.compare{grid-template-columns:1fr 64px 1fr;gap:26px}}
.cmp-col{background:#fff;border:1px solid var(--line);border-radius:var(--r);padding:22px}
.cmp-col.after{background:#fff;border-color:rgba(110,98,115,.35)}
.cmp-col h3{font-size:16px;margin-bottom:14px}
.cmp-col li{display:flex;gap:10px;font-size:14px;line-height:1.7;padding:8px 0;border-bottom:1px dashed var(--line);color:#3A352E}
.cmp-col li:last-child{border-bottom:0}
.cmp-mark{width:20px;height:20px;border-radius:50%;display:grid;place-items:center;flex-shrink:0;font-size:12px;font-weight:700;margin-top:3px}
.cmp-mark.no{background:rgba(110,98,115,.12);color:var(--violet)}
.cmp-mark.yes{background:rgba(200,240,75,.5);color:var(--ink)}
.cmp-mid{display:none}
@media(min-width:900px){
  .cmp-mid{display:grid;place-items:center;position:relative;height:100%}
  .cmp-mid::before{content:"";position:absolute;top:0;bottom:0;width:1px;background:var(--line)}
  .cmp-mid span{position:relative;z-index:1;width:44px;height:44px;border-radius:50%;background:var(--ink);color:var(--lime);display:grid;place-items:center}
}

/* ============ timeline ============ */
.timeline{display:grid;gap:26px;grid-template-columns:1fr}
@media(min-width:768px){.timeline{grid-template-columns:repeat(4,1fr);gap:20px}}
.tl-item{position:relative;padding-top:28px}
.tl-item::before{content:"";position:absolute;left:0;top:0;right:0;height:1px;background:var(--line)}
.tl-item::after{content:"";position:absolute;left:0;top:-4px;width:9px;height:9px;border-radius:50%;background:var(--lime);box-shadow:0 0 0 3px rgba(200,240,75,.22)}
.tl-num{font-size:clamp(26px,3vw,36px);font-weight:800;letter-spacing:-.04em;color:var(--ink);line-height:1;font-variant-numeric:tabular-nums}
.tl-item h3{font-size:15.5px;margin-top:10px}
.tl-item p{font-size:13.5px;color:var(--muted);margin-top:6px;line-height:1.7}

/* ============ badges ============ */
.badge{display:inline-flex;align-items:center;gap:6px;font-size:12px;font-weight:600;padding:5px 10px;border-radius:6px;border:1px solid var(--line);background:rgba(255,255,255,.6)}
.badge-cat{color:var(--violet);background:rgba(110,98,115,.10);border-color:rgba(110,98,115,.24)}
.badge-18{background:var(--ink);color:var(--paper);border-color:var(--ink);letter-spacing:.06em}
.badge-lime{background:rgba(200,240,75,.45);border-color:rgba(160,196,40,.5);color:#2B3113}
.badge-row{display:flex;flex-wrap:wrap;gap:10px;margin-top:26px}

/* ============ boundary ============ */
.split{display:grid;gap:28px;align-items:start}
@media(min-width:1024px){.split{grid-template-columns:5fr 7fr;gap:46px}}
.rule-list li{display:flex;gap:14px;padding:16px 0;border-bottom:1px solid var(--line)}
.rule-list li:first-child{border-top:1px solid var(--line)}
.rule-list b{display:block;font-size:15px}
.rule-list p{font-size:13.8px;color:var(--muted);margin-top:4px;line-height:1.7}

/* ============ rail ============ */
.rail{display:flex;gap:16px;overflow-x:auto;padding:4px 4px 16px;scroll-snap-type:x mandatory}
.rail::-webkit-scrollbar{height:6px}
.rail::-webkit-scrollbar-track{background:var(--sand);border-radius:999px}
.rail::-webkit-scrollbar-thumb{background:#C7BFB0;border-radius:999px}
.rail::-webkit-scrollbar-thumb:hover{background:var(--violet)}
.rail > *{flex:0 0 290px;scroll-snap-align:start}
@media(min-width:768px){.rail > *{flex:0 0 320px}}
.scene-card{background:#fff;border:1px solid var(--line);border-radius:var(--r);overflow:hidden;transition:transform .22s var(--ease),box-shadow .22s var(--ease),border-color .22s var(--ease)}
.scene-card:hover{transform:translateY(-4px);border-color:var(--ink);box-shadow:var(--shadow)}
.scene-card img{width:100%;aspect-ratio:4/3;object-fit:cover;transition:transform .5s var(--ease)}
.scene-card:hover img{transform:scale(1.04)}
.scene-body{padding:16px}
.scene-body h3{font-size:15.5px}
.scene-body p{font-size:13px;color:var(--muted);margin-top:6px;line-height:1.65}
.scene-tags{display:flex;flex-wrap:wrap;gap:6px;margin-top:12px}

/* ============ news ============ */
.news-grid{display:grid;gap:18px;grid-template-columns:1fr}
@media(min-width:640px){.news-grid{grid-template-columns:1fr 1fr}}
@media(min-width:1024px){.news-grid{grid-template-columns:repeat(3,1fr);gap:22px}}
.news-card{background:#fff;border:1px solid var(--line);border-radius:var(--r);overflow:hidden;transition:transform .22s var(--ease),box-shadow .22s var(--ease),border-color .22s var(--ease);height:100%}
.news-card:hover{transform:translateY(-4px);border-color:var(--ink);box-shadow:var(--shadow)}
.news-link{display:flex;flex-direction:column;height:100%}
.news-thumb{overflow:hidden}
.news-thumb img{width:100%;aspect-ratio:16/10;object-fit:cover;transition:transform .5s var(--ease)}
.news-card:hover .news-thumb img{transform:scale(1.04)}
.news-body{padding:18px;display:flex;flex-direction:column;gap:10px;flex:1}
.news-title{font-size:16px;line-height:1.5;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.news-sum{font-size:13.5px;color:var(--muted);line-height:1.7;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.news-meta{font-size:12.5px;color:#8B857A;margin-top:auto;padding-top:8px;border-top:1px solid var(--line)}
.empty-state{
  border:1px dashed var(--line);border-radius:var(--r);
  padding:52px 20px;text-align:center;color:var(--muted);background:rgba(255,255,255,.55);
}
.empty-state svg{margin:0 auto 12px;color:var(--violet);opacity:.7}
.empty-state p{font-size:14.5px}

/* ============ guard ============ */
.guard-grid{display:grid;gap:16px;grid-template-columns:1fr}
@media(min-width:640px){.guard-grid{grid-template-columns:1fr 1fr}}
.guard-item{display:flex;gap:14px;padding:20px;border:1px solid rgba(247,244,239,.16);border-radius:var(--r);background:rgba(247,244,239,.04)}
.guard-item .icon-box{background:rgba(200,240,75,.14);border-color:rgba(200,240,75,.3);color:var(--lime)}
.guard-item b{display:block;font-size:15px}
.guard-item p{font-size:13.5px;color:#B7B1A6;margin-top:4px;line-height:1.7}

/* ============ quick qa / voices / city ============ */
.qa-grid{display:grid;gap:16px;grid-template-columns:1fr}
@media(min-width:768px){.qa-grid{grid-template-columns:repeat(3,1fr)}}
.qa-card{background:var(--paper);border:1px solid var(--line);border-radius:var(--r);padding:18px}
.qa-card b{font-size:14.5px;display:block}
.qa-card p{font-size:13.5px;color:var(--muted);margin-top:6px;line-height:1.7}
.city-cloud{display:flex;flex-wrap:wrap;gap:10px;margin-top:26px}
.city-cloud span{
  padding:8px 16px;border-radius:999px;border:1px solid var(--line);
  font-size:13.5px;color:#3A352E;background:#fff;cursor:default;
  transition:background .2s var(--ease),color .2s var(--ease),border-color .2s var(--ease);
}
.city-cloud span:hover{background:var(--ink);color:var(--paper);border-color:var(--ink)}
.voice-grid{display:grid;gap:16px;grid-template-columns:1fr}
@media(min-width:768px){.voice-grid{grid-template-columns:repeat(3,1fr)}}
.voice-card{background:#fff;border:1px solid var(--line);border-radius:var(--r);padding:22px;display:flex;flex-direction:column;gap:14px}
.voice-card .quote{font-size:34px;line-height:1;color:var(--lime);font-family:Georgia,serif}
.voice-card p{font-size:14px;color:#3A352E;line-height:1.8}
.voice-user{display:flex;align-items:center;gap:10px;margin-top:auto;padding-top:12px;border-top:1px solid var(--line)}
.avatar{width:40px;height:40px;border-radius:50%;background:var(--sand);border:1px solid var(--line);display:grid;place-items:center;font-size:14px;font-weight:700;color:var(--violet);flex-shrink:0}
.voice-user b{font-size:13.5px;display:block;line-height:1.3}
.voice-user span{font-size:11.5px;color:var(--muted)}

/* ============ faq ============ */
.faq{border-top:1px solid var(--line)}
.faq-item{border-bottom:1px solid var(--line)}
.faq-item summary{
  list-style:none;cursor:pointer;display:flex;align-items:center;justify-content:space-between;gap:18px;
  padding:20px 0;font-size:15.8px;font-weight:700;line-height:1.6;
}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary::after{
  content:"+";font-size:22px;font-weight:400;color:var(--muted);line-height:1;
  transition:transform .22s var(--ease),color .22s var(--ease);flex-shrink:0;
}
.faq-item[open] summary::after{content:"−";color:var(--ink);transform:rotate(180deg)}
.faq-item summary:hover{color:var(--violet)}
.faq-body{padding:0 0 22px;font-size:14.5px;color:var(--muted);line-height:1.85;max-width:78ch}

/* ============ form ============ */
.join-grid{display:grid;gap:32px;align-items:start}
@media(min-width:1024px){.join-grid{grid-template-columns:5fr 7fr;gap:52px}}
.join-form{background:rgba(247,244,239,.05);border:1px solid rgba(247,244,239,.16);border-radius:var(--r-lg);padding:24px}
@media(min-width:640px){.join-form{padding:30px}}
.form-grid{display:grid;gap:16px;grid-template-columns:1fr}
@media(min-width:640px){.form-grid{grid-template-columns:1fr 1fr}}
.field{display:flex;flex-direction:column;gap:6px}
.field.full{grid-column:1/-1}
.field label{font-size:12.5px;letter-spacing:.06em;color:#B7B1A6}
.field input,.field select{
  width:100%;padding:12px 14px;border-radius:10px;font-size:15px;
  border:1px solid rgba(247,244,239,.22);background:rgba(247,244,239,.06);color:var(--paper);
  transition:border-color .2s var(--ease),box-shadow .2s var(--ease),background .2s var(--ease);
}
.field input::placeholder{color:rgba(247,244,239,.38)}
.field input:focus,.field select:focus{
  outline:none;border-color:var(--lime);box-shadow:0 0 0 3px rgba(200,240,75,.28);background:rgba(247,244,239,.1);
}
.field select option{color:#141210;background:#F7F4EF}
.chip-set{display:flex;flex-wrap:wrap;gap:8px}
.chip-check{
  display:inline-flex;align-items:center;gap:8px;padding:8px 14px;border-radius:999px;
  border:1px solid rgba(247,244,239,.22);font-size:13px;color:#D9D3C8;cursor:pointer;
  transition:border-color .2s var(--ease),background .2s var(--ease),color .2s var(--ease);
}
.chip-check:hover{border-color:rgba(200,240,75,.6);color:var(--paper)}
.chip-check input{accent-color:#C8F04B;width:14px;height:14px}
.chip-check:has(input:checked){background:rgba(200,240,75,.16);border-color:var(--lime);color:var(--paper)}
.agree{display:flex;gap:10px;align-items:flex-start;font-size:13px;color:#B7B1A6;line-height:1.7}
.agree input{margin-top:4px;accent-color:#C8F04B;flex-shrink:0;width:15px;height:15px}
.agree a{color:var(--lime);border-bottom:1px solid rgba(200,240,75,.4)}
.form-foot{display:flex;flex-wrap:wrap;align-items:center;gap:14px;margin-top:6px}
.form-hint{font-size:12px;color:#8B857A;line-height:1.6}

/* ============ footer ============ */
.site-footer{background:var(--ink);color:var(--paper);padding:56px 0 24px}
@media(min-width:1024px){.site-footer{padding:72px 0 28px}}
.foot-grid{display:grid;gap:32px;grid-template-columns:1fr}
@media(min-width:768px){.foot-grid{grid-template-columns:1.4fr 1fr 1fr 1fr;gap:28px}}
.foot-brand b{font-size:17px;display:block;letter-spacing:-.02em}
.foot-brand p{font-size:13.5px;color:#B7B1A6;margin-top:12px;line-height:1.8;max-width:30ch}
.foot-title{font-size:12px;letter-spacing:.18em;color:#8B857A;margin-bottom:14px}
.foot-links a{display:block;font-size:13.8px;color:#D9D3C8;padding:6px 0;transition:color .2s var(--ease)}
.foot-links a:hover{color:var(--lime)}
.foot-bottom{margin-top:40px;padding-top:20px;border-top:1px solid rgba(247,244,239,.14);display:flex;flex-wrap:wrap;gap:12px;justify-content:space-between;align-items:center;font-size:12.5px;color:#8B857A}
.foot-bottom a:hover{color:var(--lime)}
.foot-18{margin-top:16px}

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

/* roulang page: article */
:root{
  --paper:#F7F4EF;
  --sand:#EFE9E0;
  --ink:#141210;
  --muted:#6B655C;
  --line:#DED7CB;
  --lime:#C8F04B;
  --violet:#6E6273;
  --r:14px;
  --r-lg:20px;
  --shadow:0 12px 32px rgba(20,18,16,.10);
  --ease:cubic-bezier(.2,.7,.3,1);
  --wrap:1200px;
}
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;
  background:var(--paper);
  color:var(--ink);
  font-family:system-ui,"Noto Sans SC","PingFang SC","Microsoft YaHei",sans-serif;
  font-size:16px;
  line-height:1.85;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}
img{display:block;max-width:100%;height:auto}
a{color:inherit;text-decoration:none}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer}
:focus-visible{outline:2px solid var(--violet);outline-offset:3px;border-radius:6px}
.wrap{width:100%;max-width:var(--wrap);margin:0 auto;padding:0 20px}
@media(min-width:1024px){.wrap{padding:0 40px}}

/* ============ header / nav ============ */
.site-header{
  position:sticky;top:0;z-index:80;
  background:rgba(247,244,239,.92);
  backdrop-filter:saturate(180%) blur(12px);
  border-bottom:1px solid transparent;
  transition:border-color .24s var(--ease),background .24s var(--ease);
}
.site-header.scrolled{border-bottom-color:var(--line);background:rgba(247,244,239,.97)}
.head-inner{display:flex;align-items:center;height:72px;gap:10px;transition:height .24s var(--ease)}
.site-header.scrolled .head-inner{height:60px}
.brand{display:flex;flex-direction:column;line-height:1.1;flex-shrink:0}
.brand-name{font-size:16px;font-weight:800;letter-spacing:-.03em}
.brand-name em{font-style:normal;color:var(--violet)}
.brand-sub{font-size:10.5px;letter-spacing:.1em;color:var(--muted);margin-top:4px;max-width:230px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.nav-main{display:none}
@media(min-width:860px){.nav-main{display:flex;align-items:center;gap:4px;margin-left:16px}}
.nav-link{
  position:relative;padding:8px 12px;font-size:14.5px;font-weight:600;color:#3A352E;
  border-radius:8px;transition:color .2s var(--ease),background .2s var(--ease);white-space:nowrap;
}
.nav-link::after{
  content:"";position:absolute;left:12px;right:12px;bottom:2px;height:2px;
  background:var(--lime);transform:scaleX(0);transform-origin:left;
  transition:transform .24s var(--ease);
}
.nav-link:hover{color:var(--ink)}
.nav-link:hover::after{transform:scaleX(1)}
.nav-link.active{color:var(--ink)}
.nav-link.active::after{transform:scaleX(1)}
.head-right{margin-left:auto;display:flex;align-items:center;gap:8px;position:relative}
.hot-btn{
  display:none;align-items:center;gap:8px;font-size:14px;font-weight:600;
  padding:8px 12px;border-radius:8px;color:#3A352E;
  transition:background .2s var(--ease),color .2s var(--ease);
}
@media(min-width:1024px){.hot-btn{display:inline-flex}}
.hot-btn:hover{background:var(--sand);color:var(--ink)}
.hot-dot{width:6px;height:6px;border-radius:50%;background:var(--lime);display:inline-block}
.head-cta{display:none}
@media(min-width:768px){.head-cta{display:inline-flex}}
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:13px 26px;border-radius:999px;font-size:15px;font-weight:700;
  transition:background .22s var(--ease),color .22s var(--ease),border-color .22s var(--ease),transform .22s var(--ease),box-shadow .22s var(--ease);
  white-space:nowrap;
}
.btn:active{transform:translateY(1px)}
.btn-primary{background:var(--ink);color:var(--paper);border:1px solid var(--ink)}
.btn-primary:hover{background:var(--lime);color:var(--ink);border-color:var(--lime)}
.btn-ghost{background:transparent;color:var(--ink);border:1px solid rgba(20,18,16,.55);border-radius:10px}
.btn-ghost:hover{background:var(--ink);color:var(--paper);border-color:var(--ink)}
.btn-light{background:var(--paper);color:var(--ink);border:1px solid var(--paper)}
.btn-light:hover{background:var(--lime);border-color:var(--lime)}
.btn-sm{padding:9px 18px;font-size:13.5px;border-radius:999px}
.link-arrow{display:inline-flex;align-items:center;gap:6px;font-size:14px;font-weight:700;color:var(--ink);transition:color .2s var(--ease)}
.link-arrow svg{transition:transform .22s var(--ease)}
.link-arrow:hover{color:var(--violet)}
.link-arrow:hover svg{transform:translateX(3px)}

/* mega panel */
.mega-panel{
  position:absolute;top:calc(100% + 14px);right:0;
  width:min(680px,calc(100vw - 32px));
  background:var(--paper);border:1px solid var(--line);border-radius:var(--r-lg);
  box-shadow:var(--shadow);padding:22px;
  display:none;grid-template-columns:1.35fr .95fr;gap:22px;
  opacity:0;visibility:hidden;transform:translateY(8px);
  transition:opacity .16s var(--ease),transform .16s var(--ease),visibility .16s;
}
@media(min-width:1024px){
  .head-right:hover .mega-panel,.head-right:focus-within .mega-panel,.mega-panel.is-open{
    display:grid;opacity:1;visibility:visible;transform:translateY(0);
  }
}
.mega-col-title{font-size:11px;letter-spacing:.18em;color:var(--muted);margin:0 0 10px}
.mega-item{display:flex;gap:10px;padding:10px;border-radius:10px;transition:background .2s var(--ease)}
.mega-item:hover{background:var(--sand)}
.mega-item b{display:block;font-size:14px;line-height:1.4}
.mega-item span{display:block;font-size:12.5px;color:var(--muted);line-height:1.5;margin-top:2px}
.mega-card{background:var(--sand);border:1px solid var(--line);border-radius:var(--r);overflow:hidden;display:block}
.mega-card img{width:100%;aspect-ratio:4/3;object-fit:cover}
.mega-card-body{padding:12px 14px}
.mega-card-body b{font-size:14px;display:block}
.mega-card-body span{font-size:12.5px;color:var(--muted)}
.menu-btn{
  display:inline-flex;flex-direction:column;justify-content:center;gap:5px;
  width:42px;height:42px;border:1px solid var(--line);border-radius:10px;align-items:center;
  transition:border-color .2s var(--ease),background .2s var(--ease);
}
.menu-btn:hover{border-color:var(--ink);background:var(--sand)}
@media(min-width:860px){.menu-btn{display:none}}
.menu-btn i{display:block;width:18px;height:2px;background:var(--ink);transition:transform .24s var(--ease),opacity .24s var(--ease)}
.menu-btn.is-open i:nth-child(1){transform:translateY(7px) rotate(45deg)}
.menu-btn.is-open i:nth-child(2){opacity:0}
.menu-btn.is-open i:nth-child(3){transform:translateY(-7px) rotate(-45deg)}
.drawer{display:none;border-top:1px solid var(--line);background:var(--paper);padding:18px 20px 26px}
.drawer.is-open{display:block}
.drawer-group{margin-bottom:16px}
.drawer-group h4{font-size:11px;letter-spacing:.18em;color:var(--muted);margin:0 0 8px}
.drawer-group a{display:block;padding:9px 0;font-size:15px;font-weight:600;border-bottom:1px solid var(--line)}
.drawer-group a:hover{color:var(--violet)}

/* ============ section base ============ */
.sec{padding:56px 0}
@media(min-width:1024px){.sec{padding:80px 0}}
.sec-sand{background:var(--sand)}
.sec-dark{background:var(--ink);color:var(--paper);border-top:1px solid rgba(247,244,239,.12);border-bottom:1px solid rgba(247,244,239,.12)}
.eyebrow{display:inline-flex;align-items:center;gap:10px;font-size:12px;letter-spacing:.18em;color:var(--muted);text-transform:uppercase}
.eyebrow::before{content:"";width:24px;height:2px;background:var(--lime);flex-shrink:0}
.sec-dark .eyebrow{color:#B7B1A6}
.sec-title{font-size:clamp(25px,3.2vw,38px);letter-spacing:-.025em;margin:12px 0 0;line-height:1.2}
.sec-lead{color:var(--muted);max-width:64ch;margin:14px 0 0;font-size:15.5px}
.badge{
  display:inline-flex;align-items:center;gap:6px;padding:4px 10px;border-radius:6px;
  font-size:12px;line-height:1.6;border:1px solid var(--line);background:rgba(247,244,239,.7);color:var(--muted);
}
.badge-cat{color:var(--violet);background:rgba(110,98,115,.10);border-color:rgba(110,98,115,.28)}
.badge-audit{color:#3F5B00;background:rgba(200,240,75,.30);border-color:rgba(200,240,75,.75)}

/* ============ article top / crumbs ============ */
.arc-top{padding:26px 0 0}
.crumbs{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13px;color:var(--muted)}
.crumbs a{color:var(--muted);transition:color .2s var(--ease)}
.crumbs a:hover{color:var(--ink)}
.crumbs .sep{color:#B7B1A6}
.crumbs .now{color:var(--ink);font-weight:700}
.arc-bar{
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:12px;
  margin-top:22px;padding-bottom:16px;border-bottom:1px solid var(--line);
}
.arc-date{font-size:13px;color:var(--muted);font-variant-numeric:tabular-nums}

/* ============ article head ============ */
.arc-head{padding:26px 0 0}
.arc-head h1{
  font-size:clamp(27px,3.9vw,44px);
  line-height:1.24;
  letter-spacing:-.032em;
  margin:0;
  max-width:24ch;
  overflow-wrap:anywhere;
}
.arc-meta{display:flex;flex-wrap:wrap;align-items:center;gap:10px 16px;margin:20px 0 0;font-size:13.5px;color:var(--muted)}
.arc-meta .dot{width:4px;height:4px;border-radius:50%;background:var(--line)}
.arc-rule{height:1px;background:var(--line);margin-top:26px}
.arc-cover{margin-top:26px}
.arc-cover img{width:100%;aspect-ratio:16/9;object-fit:cover;border-radius:var(--r-lg);border:1px solid var(--line)}
.arc-cover figcaption{font-size:12px;color:var(--muted);margin-top:10px}

/* ============ points card ============ */
.points-card{
  background:var(--paper);border:1px solid var(--line);border-radius:var(--r-lg);
  padding:26px 24px;box-shadow:none;
}
@media(min-width:1024px){.points-card{padding:34px 36px;display:grid;grid-template-columns:5fr 7fr;gap:36px;align-items:start}}
.points-card h2{font-size:clamp(20px,2.4vw,26px);letter-spacing:-.02em;margin:10px 0 0;line-height:1.35}
.points-list{list-style:none;margin:18px 0 0;padding:0}
.points-list li{
  position:relative;padding-left:22px;margin-bottom:14px;font-size:15px;color:#2C2721;line-height:1.75;
}
.points-list li:last-child{margin-bottom:0}
.points-list li::before{
  content:"";position:absolute;left:0;top:.72em;width:12px;height:2px;background:var(--lime);
}

/* ============ reading area ============ */
.arc-grid{display:grid;gap:40px}
@media(min-width:1024px){
  .arc-grid{grid-template-columns:minmax(0,1fr) 288px;gap:56px;align-items:start}
}
.article-body{max-width:720px;min-width:0}
.article-body h2{font-size:24px;line-height:1.4;letter-spacing:-.02em;margin:2em 0 .7em}
.article-body h3{font-size:19px;line-height:1.45;letter-spacing:-.01em;margin:1.7em 0 .6em}
.article-body h4{font-size:16.5px;margin:1.5em 0 .5em}
.article-body p{margin:0 0 1.2em;font-size:16px;line-height:1.9;color:#241F1A}
.article-body a{
  color:var(--ink);font-weight:600;
  border-bottom:1px solid rgba(20,18,16,.18);
  background-image:linear-gradient(var(--lime),var(--lime));
  background-repeat:no-repeat;background-position:0 100%;background-size:0% 3px;
  transition:background-size .24s var(--ease),color .2s var(--ease);
}
.article-body a:hover{background-size:100% 3px;color:#000}
.article-body ul,.article-body ol{margin:0 0 1.3em;padding-left:0;list-style:none}
.article-body ul li{position:relative;padding-left:20px;margin-bottom:.6em;font-size:16px;line-height:1.85}
.article-body ul li::before{content:"";position:absolute;left:0;top:.78em;width:10px;height:2px;background:var(--violet)}
.article-body ol{counter-reset:ord}
.article-body ol li{position:relative;padding-left:34px;margin-bottom:.7em;font-size:16px;line-height:1.85;counter-increment:ord}
.article-body ol li::before{
  content:counter(ord,decimal-leading-zero);
  position:absolute;left:0;top:.12em;font-size:13px;font-weight:800;color:#6E7A1E;
  font-variant-numeric:tabular-nums;letter-spacing:.02em;
}
.article-body blockquote{
  margin:1.7em 0;padding:18px 22px;background:var(--sand);
  border-left:3px solid var(--lime);border-radius:0 var(--r) var(--r) 0;color:#3A352E;
}
.article-body blockquote p:last-child{margin-bottom:0}
.article-body img{border-radius:var(--r);margin:1.5em 0;width:100%}
.article-body figure{margin:1.6em 0}
.article-body figcaption{font-size:12px;color:var(--muted);margin-top:8px;text-align:center}
.article-body hr{border:0;border-top:1px solid var(--line);margin:2.2em 0}
.article-body table{width:100%;border-collapse:collapse;margin:1.5em 0;font-size:14.5px}
.article-body th,.article-body td{border:1px solid var(--line);padding:10px 12px;text-align:left}
.article-body th{background:var(--sand);font-weight:700}
.article-body code{background:var(--sand);border:1px solid var(--line);border-radius:6px;padding:1px 6px;font-size:13.5px}
.article-body pre{background:var(--ink);color:#EDE8DF;border-radius:var(--r);padding:16px 18px;overflow:auto;font-size:13.5px}
.article-body pre code{background:none;border:0;color:inherit;padding:0}

/* side cards */
.arc-side{display:grid;gap:16px}
@media(min-width:1024px){.arc-side{position:sticky;top:92px}}
.side-card{background:var(--paper);border:1px solid var(--line);border-radius:var(--r);padding:20px}
.side-title{font-size:11px;letter-spacing:.18em;color:var(--muted);margin:0 0 12px}
.side-list{list-style:none;margin:0;padding:0}
.side-list li{position:relative;padding-left:16px;font-size:13.5px;line-height:1.7;color:#2C2721;margin-bottom:10px}
.side-list li:last-child{margin-bottom:0}
.side-list li::before{content:"";position:absolute;left:0;top:.75em;width:8px;height:2px;background:var(--lime)}
.side-card-dark{background:var(--ink);color:#EDE8DF;border-color:var(--ink)}
.side-card-dark .side-title{color:#B7B1A6}
.side-card-dark p{font-size:13.5px;line-height:1.75;color:#D9D3C8;margin:0 0 14px}
.side-card-dark .badge{background:rgba(200,240,75,.12);border-color:rgba(200,240,75,.45);color:var(--lime)}

/* empty state */
.empty-state{
  border:1px dashed var(--line);border-radius:var(--r-lg);padding:44px 26px;text-align:center;background:var(--sand);
}
.empty-state h2{font-size:20px;margin:0 0 10px;letter-spacing:-.02em}
.empty-state p{color:var(--muted);font-size:14.5px;margin:0 0 20px}

/* ============ author ============ */
.author-card{
  display:flex;flex-wrap:wrap;align-items:center;gap:16px;
  background:var(--paper);border:1px solid var(--line);border-radius:var(--r-lg);
  padding:22px 24px;
}
.author-avatar{
  width:48px;height:48px;border-radius:50%;flex-shrink:0;
  background:var(--ink);color:var(--lime);display:flex;align-items:center;justify-content:center;
  font-weight:800;font-size:17px;letter-spacing:0;
}
.author-meta{flex:1 1 240px;min-width:0}
.author-meta b{font-size:15px;display:block}
.author-meta p{font-size:13.5px;color:var(--muted);margin:4px 0 0;line-height:1.7}

/* ============ related ============ */
.rel-grid{display:grid;gap:16px;margin-top:26px}
@media(min-width:640px){.rel-grid{grid-template-columns:repeat(2,1fr)}}
@media(min-width:1024px){.rel-grid{grid-template-columns:repeat(3,1fr)}}
.rel-card{
  display:flex;gap:14px;align-items:flex-start;
  background:var(--paper);border:1px solid var(--line);border-radius:var(--r);
  padding:14px;transition:transform .22s var(--ease),box-shadow .22s var(--ease),border-color .22s var(--ease);
}
.rel-card:hover{transform:translateY(-4px);border-color:var(--ink);box-shadow:var(--shadow)}
.rel-thumb{width:64px;height:64px;flex-shrink:0;border-radius:10px;overflow:hidden;background:var(--sand)}
.rel-thumb img{width:100%;height:100%;object-fit:cover;transition:transform .22s var(--ease)}
.rel-card:hover .rel-thumb img{transform:scale(1.05)}
.rel-info{min-width:0}
.rel-info b{display:block;font-size:14.5px;line-height:1.5;letter-spacing:-.01em;overflow:hidden;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical}
.rel-info span{display:block;font-size:12.5px;color:var(--muted);margin-top:6px;font-variant-numeric:tabular-nums}
.rel-empty{font-size:14px;color:var(--muted);border:1px dashed var(--line);border-radius:var(--r);padding:22px;text-align:center;margin-top:22px}

/* ============ prev / next ============ */
.arc-nav-grid{display:grid;gap:14px}
@media(min-width:768px){.arc-nav-grid{grid-template-columns:1fr 1fr}}
.arc-nav-card{
  display:block;border:1px solid var(--line);border-radius:var(--r);background:var(--paper);
  padding:20px 22px;
  transition:background .22s var(--ease),color .22s var(--ease),border-color .22s var(--ease),transform .22s var(--ease);
}
.arc-nav-card span{display:block;font-size:11px;letter-spacing:.18em;color:var(--muted);transition:color .22s var(--ease)}
.arc-nav-card b{display:block;font-size:16px;margin-top:8px;letter-spacing:-.01em;line-height:1.5}
.arc-nav-card:hover{background:var(--ink);color:var(--paper);border-color:var(--ink);transform:translateY(-3px)}
.arc-nav-card:hover span{color:var(--lime)}
.arc-nav-right{text-align:right}

/* ============ cta band ============ */
.cta-band{background:var(--ink);color:var(--paper);padding:56px 0;border-top:1px solid rgba(247,244,239,.12)}
@media(min-width:1024px){.cta-band{padding:72px 0}}
.cta-band-inner{display:grid;gap:26px;align-items:center}
@media(min-width:1024px){.cta-band-inner{grid-template-columns:7fr 5fr;gap:40px}}
.cta-band h2{font-size:clamp(23px,3vw,36px);letter-spacing:-.028em;line-height:1.22;margin:0;max-width:22ch}
.cta-band p{color:#B7B1A6;font-size:15px;margin:14px 0 0;max-width:52ch}
.cta-actions{display:flex;flex-wrap:wrap;gap:12px}
@media(min-width:1024px){.cta-actions{justify-content:flex-end}}

/* ============ footer ============ */
.site-footer{background:var(--ink);color:#EDE8DF;padding:60px 0 26px;border-top:1px solid rgba(247,244,239,.12)}
.foot-grid{display:grid;gap:32px;grid-template-columns:1fr}
@media(min-width:768px){.foot-grid{grid-template-columns:1.6fr 1fr 1fr 1fr;gap:36px}}
.foot-brand b{font-size:16px;letter-spacing:-.02em;display:block;line-height:1.5}
.foot-brand p{font-size:13.5px;color:#B7B1A6;line-height:1.8;margin:12px 0 0;max-width:34ch}
.foot-18{margin-top:16px}
.foot-18 .badge{background:rgba(200,240,75,.12);border-color:rgba(200,240,75,.45);color:var(--lime)}
.foot-title{font-size:11px;letter-spacing:.18em;color:#8E887D;margin:0 0 14px}
.foot-links a{display:block;font-size:13.5px;color:#CFC9BE;padding:5px 0;transition:color .2s var(--ease)}
.foot-links a:hover{color:var(--lime)}
.foot-bottom{
  display:flex;flex-wrap:wrap;justify-content:space-between;gap:10px;
  margin-top:44px;padding-top:20px;border-top:1px solid rgba(247,244,239,.14);
  font-size:12.5px;color:#8E887D;
}
.foot-bottom span{overflow-wrap:anywhere}

@media (prefers-reduced-motion: reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{transition-duration:.001ms !important;animation-duration:.001ms !important}
}

/* roulang page: category1 */
:root{
  --paper:#F7F4EF;
  --sand:#EFE9E0;
  --ink:#141210;
  --muted:#6B655C;
  --line:#DED7CB;
  --lime:#C8F04B;
  --violet:#6E6273;
  --r:14px;
  --r-lg:20px;
  --shadow:0 12px 32px rgba(20,18,16,.10);
  --ease:cubic-bezier(.2,.7,.3,1);
  --wrap:1200px;
}
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;
  background:var(--paper);
  color:var(--ink);
  font-family:system-ui,"Noto Sans SC","PingFang SC","Microsoft YaHei",sans-serif;
  font-size:16px;
  line-height:1.85;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}
img{display:block;max-width:100%;height:auto}
a{color:inherit;text-decoration:none}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer}
h1,h2,h3,h4,p,ul,ol{margin:0}
ul,ol{padding:0;list-style:none}
.wrap{width:100%;max-width:var(--wrap);margin:0 auto;padding:0 20px}
@media(min-width:1024px){.wrap{padding:0 40px}}
.num{font-variant-numeric:tabular-nums}

/* ============ header / nav ============ */
.site-header{
  position:sticky;top:0;z-index:80;
  background:rgba(247,244,239,.92);
  backdrop-filter:saturate(180%) blur(12px);
  border-bottom:1px solid transparent;
  transition:border-color .24s var(--ease),background .24s var(--ease);
}
.site-header.scrolled{border-bottom-color:var(--line);background:rgba(247,244,239,.97)}
.head-inner{display:flex;align-items:center;gap:14px;height:72px;transition:height .24s var(--ease)}
.site-header.scrolled .head-inner{height:60px}
.brand{display:flex;flex-direction:column;line-height:1.1;flex-shrink:0}
.brand-name{font-size:17px;font-weight:800;letter-spacing:-.03em;white-space:nowrap}
.brand-name em{font-style:normal;color:var(--violet)}
.brand-sub{font-size:11px;letter-spacing:.16em;color:var(--muted);margin-top:4px;white-space:nowrap}
.nav-main{display:none;align-items:center;gap:6px;margin-left:14px}
@media(min-width:768px){.nav-main{display:flex}}
.nav-link{
  position:relative;padding:8px 12px;font-size:14.5px;font-weight:600;color:#3A352E;
  border-radius:8px;transition:color .2s var(--ease),background .2s var(--ease);
}
.nav-link::after{
  content:"";position:absolute;left:12px;right:12px;bottom:2px;height:2px;
  background:var(--lime);transform:scaleX(0);transform-origin:left;
  transition:transform .24s var(--ease);
}
.nav-link:hover{color:var(--ink)}
.nav-link:hover::after{transform:scaleX(1)}
.nav-link.active{color:var(--ink)}
.nav-link.active::after{transform:scaleX(1)}
.nav-link:focus-visible{outline:2px solid var(--violet);outline-offset:2px}
.head-right{margin-left:auto;display:flex;align-items:center;gap:10px;position:relative}
.hot-btn{
  display:none;align-items:center;gap:8px;font-size:14px;font-weight:600;
  padding:8px 12px;border-radius:8px;color:#3A352E;
  transition:background .2s var(--ease),color .2s var(--ease);
}
@media(min-width:768px){.hot-btn{display:inline-flex}}
.hot-btn:hover{background:var(--sand);color:var(--ink)}
.hot-btn .dot{width:6px;height:6px;border-radius:50%;background:var(--lime);display:inline-block}
/* mega panel */
.mega-panel{
  position:absolute;top:calc(100% + 12px);right:0;
  width:min(680px,calc(100vw - 32px));
  background:var(--paper);border:1px solid var(--line);border-radius:var(--r-lg);
  box-shadow:var(--shadow);padding:22px;
  display:grid;grid-template-columns:1.35fr .95fr;gap:22px;
  opacity:0;visibility:hidden;transform:translateY(8px);
  transition:opacity .16s var(--ease),transform .16s var(--ease),visibility .16s;
  z-index:90;
}
.head-right:hover .mega-panel,
.head-right:focus-within .mega-panel{opacity:1;visibility:visible;transform:translateY(0)}
.mega-col-title{font-size:11px;letter-spacing:.18em;color:var(--muted);margin-bottom:10px}
.mega-item{display:flex;gap:10px;padding:10px;border-radius:10px;transition:background .2s var(--ease)}
.mega-item:hover{background:var(--sand)}
.mega-item b{display:block;font-size:14px;line-height:1.4}
.mega-item span{display:block;font-size:12.5px;color:var(--muted);line-height:1.5;margin-top:2px}
.mega-card{background:var(--sand);border:1px solid var(--line);border-radius:var(--r);overflow:hidden}
.mega-card img{width:100%;aspect-ratio:4/3;object-fit:cover}
.mega-card-body{padding:12px 14px}
.mega-card-body b{font-size:14px;display:block}
.mega-card-body span{font-size:12.5px;color:var(--muted)}
.menu-btn{
  display:inline-flex;flex-direction:column;justify-content:center;gap:5px;
  width:42px;height:42px;border:1px solid var(--line);border-radius:10px;align-items:center;
  margin-left:auto;
}
@media(min-width:768px){.menu-btn{display:none}}
.menu-btn i{display:block;width:18px;height:2px;background:var(--ink);transition:transform .24s var(--ease),opacity .24s var(--ease)}
.menu-btn.is-open i:nth-child(1){transform:translateY(7px) rotate(45deg)}
.menu-btn.is-open i:nth-child(2){opacity:0}
.menu-btn.is-open i:nth-child(3){transform:translateY(-7px) rotate(-45deg)}
.drawer{display:none;border-top:1px solid var(--line);background:var(--paper);padding:18px 20px 26px}
.drawer.is-open{display:block}
.drawer-group{margin-bottom:16px}
.drawer-group h4{font-size:11px;letter-spacing:.18em;color:var(--muted);margin-bottom:8px}
.drawer-group a{display:block;padding:9px 0;font-size:15px;font-weight:600;border-bottom:1px solid var(--line)}
.drawer-group a:hover{color:var(--violet)}

/* ============ buttons / badges ============ */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:13px 26px;border-radius:999px;font-size:15px;font-weight:700;
  transition:background .22s var(--ease),color .22s var(--ease),border-color .22s var(--ease),transform .22s var(--ease);
  white-space:nowrap;
}
.btn:active{transform:translateY(1px)}
.btn:focus-visible{outline:2px solid var(--violet);outline-offset:2px}
.btn-primary{background:var(--ink);color:var(--paper);border:1px solid var(--ink)}
.btn-primary:hover{background:var(--lime);color:var(--ink);border-color:var(--lime)}
.btn-ghost{background:transparent;color:var(--ink);border:1px solid rgba(20,18,16,.55);border-radius:10px}
.btn-ghost:hover{background:var(--ink);color:var(--paper);border-color:var(--ink)}
.btn-sm{padding:9px 18px;font-size:13.5px;border-radius:999px}
.link-arrow{display:inline-flex;align-items:center;gap:6px;font-size:14px;font-weight:700;color:var(--ink)}
.link-arrow svg{transition:transform .22s var(--ease)}
.link-arrow:hover svg{transform:translateX(3px)}
.link-arrow:hover{color:var(--violet)}
.tag{
  display:inline-flex;align-items:center;gap:6px;padding:6px 14px;border-radius:6px;
  font-size:12.5px;font-weight:600;background:var(--paper);border:1px solid var(--line);color:#3A352E;
}
.tag-violet{background:rgba(110,98,115,.10);border-color:rgba(110,98,115,.28);color:var(--violet)}
.tag-lime{background:rgba(200,240,75,.28);border-color:rgba(20,18,16,.18);color:#2C2A20}
.badge{display:inline-flex;align-items:center;padding:4px 10px;border-radius:999px;font-size:11.5px;font-weight:700;letter-spacing:.04em}
.badge-18{background:var(--lime);color:var(--ink)}
.eyebrow{display:inline-flex;align-items:center;gap:10px;font-size:12px;letter-spacing:.18em;color:var(--muted);text-transform:uppercase}
.eyebrow::before{content:"";width:24px;height:2px;background:var(--lime);flex-shrink:0}
.sec{padding:64px 0}
@media(min-width:1024px){.sec{padding:88px 0}}
.sec-sand{background:var(--sand);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.sec-title{font-size:clamp(25px,3.2vw,38px);letter-spacing:-.025em;margin-top:12px;max-width:26ch;line-height:1.2}
.sec-lead{color:var(--muted);max-width:64ch;margin-top:14px;font-size:15.5px}

/* ============ page head ============ */
.page-head{
  position:relative;overflow:hidden;
  border-bottom:1px solid var(--line);
  background:linear-gradient(180deg,rgba(239,233,224,.75) 0%,rgba(247,244,239,0) 100%);
}
.page-head-bg{
  position:absolute;inset:0;
  background-image:url('/assets/images/82dd86b3fa566fea.webp');
  background-size:cover;background-position:center;
  opacity:.10;pointer-events:none;
}
.page-head-inner{position:relative;padding:40px 0 44px}
@media(min-width:1024px){.page-head-inner{padding:52px 0 56px}}
.head-grid{display:grid;gap:32px}
@media(min-width:1024px){.head-grid{grid-template-columns:1fr 320px;gap:56px;align-items:start}}
.crumb{font-size:13px;color:var(--muted);display:flex;flex-wrap:wrap;gap:8px;align-items:center}
.crumb a:hover{color:var(--ink);text-decoration:underline;text-decoration-color:var(--lime);text-underline-offset:4px}
.crumb .cur{color:var(--ink);font-weight:700}
.crumb .sep{color:var(--line)}
h1.page-h1{
  font-size:clamp(28px,4.3vw,44px);
  letter-spacing:-.035em;
  line-height:1.14;
  font-weight:800;
  margin-top:16px;
  max-width:22ch;
}
.page-lead{color:var(--muted);font-size:16px;max-width:58ch;margin-top:16px}
.head-stats{display:flex;flex-wrap:wrap;gap:28px;margin-top:24px}
.head-stats .s b{display:block;font-size:24px;letter-spacing:-.03em;line-height:1.2}
.head-stats .s span{font-size:12.5px;color:var(--muted)}
.tag-stack{display:flex;flex-direction:column;gap:10px}
.tag-stack .stack-title{font-size:11px;letter-spacing:.18em;color:var(--muted);margin-bottom:2px}
.tag-stack .tag{justify-content:flex-start;width:100%;padding:9px 14px;background:rgba(247,244,239,.85)}

/* ============ intro + metrics ============ */
.intro-grid{display:grid;gap:32px}
@media(min-width:1024px){.intro-grid{grid-template-columns:5fr 7fr;gap:56px;align-items:start}}
.point-list{display:flex;flex-direction:column;gap:16px;margin-top:22px}
.point-list li{display:flex;gap:12px;font-size:15.5px;color:#3A352E}
.point-list li::before{content:"";width:16px;height:2px;background:var(--lime);margin-top:14px;flex-shrink:0}
.point-list b{display:block;color:var(--ink)}
.point-list span{display:block;font-size:14px;color:var(--muted);line-height:1.7}
.metric-row{display:grid;gap:16px;grid-template-columns:1fr}
@media(min-width:640px){.metric-row{grid-template-columns:repeat(3,1fr)}}
.metric-box{
  border:1px solid var(--line);border-radius:var(--r);background:var(--paper);
  padding:20px 18px;transition:border-color .22s var(--ease),box-shadow .22s var(--ease),transform .22s var(--ease);
}
.metric-box:hover{border-color:var(--ink);box-shadow:var(--shadow);transform:translateY(-3px)}
.metric-box b{display:block;font-size:30px;letter-spacing:-.035em;line-height:1.1;color:var(--ink)}
.metric-box em{font-style:normal;font-size:13px;color:var(--muted);display:block;margin-top:6px}
.intro-note{
  margin-top:24px;background:var(--sand);border:1px solid var(--line);border-radius:var(--r);
  padding:18px 20px;font-size:14px;color:#3A352E;
}

/* ============ scene cards ============ */
.card-grid{display:grid;gap:20px;grid-template-columns:1fr;margin-top:34px}
@media(min-width:640px){.card-grid{grid-template-columns:repeat(2,1fr)}}
@media(min-width:1024px){.card-grid{grid-template-columns:repeat(3,1fr)}}
.scene-card{
  background:var(--paper);border:1px solid var(--line);border-radius:var(--r);overflow:hidden;
  transition:transform .22s var(--ease),box-shadow .22s var(--ease),border-color .22s var(--ease);
  display:flex;flex-direction:column;
}
.scene-card:hover{transform:translateY(-4px);box-shadow:var(--shadow);border-color:var(--ink)}
.scene-thumb{aspect-ratio:4/3;overflow:hidden;background:var(--sand)}
.scene-thumb img{width:100%;height:100%;object-fit:cover;transition:transform .22s var(--ease)}
.scene-card:hover .scene-thumb img{transform:scale(1.04)}
.scene-body{padding:18px 20px 20px;display:flex;flex-direction:column;gap:10px;flex:1}
.scene-body h3{font-size:17.5px;font-weight:800;letter-spacing:-.02em;line-height:1.35}
.scene-body p{font-size:14px;color:var(--muted);line-height:1.75}
.scene-meta{margin-top:auto;padding-top:12px;border-top:1px solid var(--line);display:flex;justify-content:space-between;gap:10px;font-size:12.5px;color:var(--muted)}

/* ============ channel entries ============ */
.chan-grid{display:grid;gap:16px;grid-template-columns:1fr;margin-top:30px}
@media(min-width:640px){.chan-grid{grid-template-columns:repeat(2,1fr)}}
@media(min-width:1024px){.chan-grid{grid-template-columns:repeat(3,1fr)}}
.chan-item{
  display:flex;gap:14px;align-items:flex-start;padding:18px 20px;border:1px solid var(--line);
  border-radius:var(--r);background:var(--paper);
  transition:background .22s var(--ease),border-color .22s var(--ease),transform .22s var(--ease);
}
.chan-item:hover{background:var(--sand);border-color:var(--ink);transform:translateY(-3px)}
.chan-ico{
  width:38px;height:38px;flex-shrink:0;border-radius:10px;display:grid;place-items:center;
  background:rgba(200,240,75,.35);color:var(--ink);font-weight:800;font-size:14px;letter-spacing:-.02em;
}
.chan-item b{display:block;font-size:15.5px}
.chan-item span{display:block;font-size:13px;color:var(--muted);margin-top:2px}

/* ============ steps ============ */
.step-grid{display:grid;gap:24px;grid-template-columns:1fr;margin-top:34px}
@media(min-width:768px){.step-grid{grid-template-columns:repeat(3,1fr)}}
.step-item{padding-top:22px;border-top:1px solid var(--line)}
.step-item .sn{font-size:44px;line-height:1;font-weight:800;letter-spacing:-.05em;color:var(--ink);font-variant-numeric:tabular-nums}
.step-item .sn i{font-style:normal;color:var(--violet)}
.step-item h3{font-size:17px;margin-top:12px;font-weight:800;letter-spacing:-.02em}
.step-item p{font-size:14px;color:var(--muted);margin-top:8px}

/* ============ safety ============ */
.safety-grid{display:grid;gap:32px}
@media(min-width:1024px){.safety-grid{grid-template-columns:6fr 6fr;gap:56px;align-items:start}}
.check-list{display:flex;flex-direction:column;gap:12px;margin-top:20px}
.check-list li{
  display:flex;gap:12px;align-items:flex-start;background:var(--paper);border:1px solid var(--line);
  border-radius:12px;padding:14px 16px;font-size:14.5px;
  transition:border-color .22s var(--ease),transform .22s var(--ease);
}
.check-list li:hover{border-color:var(--ink);transform:translateY(-2px)}
.check-list .ck{width:20px;height:20px;flex-shrink:0;border-radius:50%;background:var(--lime);display:grid;place-items:center;font-size:11px;font-weight:800;margin-top:4px}
.check-list b{display:block;font-size:14.5px}
.check-list span{display:block;font-size:13px;color:var(--muted);line-height:1.7}

/* ============ faq ============ */
.faq-list{margin-top:28px;border-top:1px solid var(--line)}
.faq-item{border-bottom:1px solid var(--line)}
.faq-item summary{
  list-style:none;cursor:pointer;display:flex;align-items:center;justify-content:space-between;gap:16px;
  padding:20px 2px;font-size:16px;font-weight:700;letter-spacing:-.01em;
  transition:color .2s var(--ease);
}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary:hover{color:var(--violet)}
.faq-item summary:focus-visible{outline:2px solid var(--violet);outline-offset:4px;border-radius:6px}
.faq-item .fi{position:relative;width:18px;height:18px;flex-shrink:0}
.faq-item .fi::before,.faq-item .fi::after{
  content:"";position:absolute;background:var(--ink);transition:transform .24s var(--ease),opacity .24s var(--ease);
}
.faq-item .fi::before{left:0;top:8px;width:18px;height:2px}
.faq-item .fi::after{left:8px;top:0;width:2px;height:18px}
.faq-item[open] .fi::after{transform:scaleY(0);opacity:0}
.faq-body{padding:0 2px 22px;font-size:14.5px;color:var(--muted);max-width:74ch;line-height:1.85}

/* ============ news list ============ */
.news-head{display:flex;flex-wrap:wrap;gap:14px;align-items:flex-end;justify-content:space-between}
.news-grid{display:grid;gap:20px;grid-template-columns:1fr;margin-top:30px}
@media(min-width:640px){.news-grid{grid-template-columns:repeat(2,1fr)}}
@media(min-width:1024px){.news-grid{grid-template-columns:repeat(3,1fr)}}
.news-card{
  display:flex;flex-direction:column;gap:10px;padding:20px;border:1px solid var(--line);border-radius:var(--r);
  background:var(--paper);transition:transform .22s var(--ease),box-shadow .22s var(--ease),border-color .22s var(--ease);
  min-height:180px;
}
.news-card:hover{transform:translateY(-4px);box-shadow:var(--shadow);border-color:var(--ink)}
.news-card h3{font-size:16px;font-weight:800;line-height:1.45;letter-spacing:-.01em;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.news-card p{font-size:13.5px;color:var(--muted);line-height:1.7;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.news-meta{margin-top:auto;padding-top:12px;border-top:1px solid var(--line);display:flex;justify-content:space-between;gap:10px;font-size:12.5px;color:var(--muted)}
.empty-state{
  margin-top:30px;border:1px dashed var(--line);border-radius:var(--r);background:rgba(239,233,224,.5);
  padding:44px 20px;text-align:center;color:var(--muted);font-size:14.5px;
}
.empty-state .ico{width:44px;height:44px;margin:0 auto 12px;border-radius:12px;background:var(--sand);border:1px solid var(--line);display:grid;place-items:center;font-weight:800}

/* ============ related + back ============ */
.relate-wrap{display:grid;gap:26px}
@media(min-width:1024px){.relate-wrap{grid-template-columns:1fr auto;align-items:end;gap:40px}}
.relate-list{display:grid;gap:12px;grid-template-columns:1fr;margin-top:24px}
@media(min-width:640px){.relate-list{grid-template-columns:repeat(2,1fr)}}
@media(min-width:1024px){.relate-list{grid-template-columns:repeat(4,1fr)}}
.relate-item{
  display:flex;flex-direction:column;gap:6px;padding:14px 16px;border:1px solid var(--line);border-radius:12px;
  background:var(--paper);font-size:13.5px;font-weight:600;line-height:1.5;
  transition:background .22s var(--ease),border-color .22s var(--ease);
}
.relate-item:hover{background:var(--sand);border-color:var(--ink)}
.relate-item em{font-style:normal;font-size:12px;color:var(--muted);font-weight:400}

/* ============ footer ============ */
.site-footer{background:var(--ink);color:#E8E3D9;padding:56px 0 0;margin-top:0}
.foot-grid{display:grid;gap:32px;grid-template-columns:1fr}
@media(min-width:640px){.foot-grid{grid-template-columns:repeat(2,1fr)}}
@media(min-width:1024px){.foot-grid{grid-template-columns:1.5fr 1fr 1fr 1fr;gap:40px}}
.foot-brand b{color:#FFFFFF;font-size:16.5px;display:block;letter-spacing:-.02em}
.foot-brand p{font-size:13.5px;color:#A8A298;line-height:1.8;margin-top:12px;max-width:34ch}
.foot-18{margin-top:16px}
.foot-title{font-size:13px;letter-spacing:.18em;color:#8F897F;margin-bottom:14px}
.foot-links a{display:block;padding:6px 0;font-size:14px;color:#CFC9BE;transition:color .2s var(--ease),transform .2s var(--ease)}
.foot-links a:hover{color:var(--lime);transform:translateX(2px)}
.foot-bottom{
  border-top:1px solid rgba(255,255,255,.12);margin-top:44px;padding:18px 0 24px;
  display:flex;flex-wrap:wrap;gap:10px;justify-content:space-between;
  font-size:12.5px;color:#8F897F;
}

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