/* roulang page: index */
:root{
  --c-primary:#123B36;
  --c-primary-deep:#0C2A26;
  --c-accent:#D9602F;
  --c-accent-hover:#B94E23;
  --c-accent-soft:#FBE4D6;
  --c-teal:#2F6D62;
  --c-bg:#FBF7F2;
  --c-surface:#FFFFFF;
  --c-tint:#F1F5F2;
  --c-line:#E7DFD5;
  --c-ink:#1B2320;
  --c-ink2:#5C6A66;
  --r-card:16px;
  --r-sm:12px;
  --r-pill:999px;
  --r-img:14px;
  --sh-1:0 2px 4px rgba(18,59,54,.05);
  --sh-2:0 14px 32px -14px rgba(18,59,54,.22);
  --container:1200px;
  --ease:180ms ease;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  font-family:"PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",sans-serif;
  font-size:16px;
  line-height:1.75;
  color:var(--c-ink);
  background:var(--c-bg);
  font-variant-numeric:tabular-nums;
}
img{max-width:100%;display:block;border-radius:var(--r-img)}
a{color:inherit;text-decoration:none}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer}
ul,ol{list-style:none;margin:0;padding:0}
h1,h2,h3,h4,p{margin:0}
h1,h2,h3,h4{line-height:1.25;letter-spacing:-.01em;color:var(--c-primary-deep)}
svg{display:block}
:focus-visible{outline:2px solid var(--c-accent);outline-offset:2px;border-radius:6px}

.container{width:100%;max-width:var(--container);margin:0 auto;padding:0 24px}
.section{padding:96px 0}
.section--tint{background:var(--c-tint)}
.section--surface{background:var(--c-surface)}
.section--deep{background:var(--c-primary-deep)}

.eyebrow{
  display:inline-block;
  font-size:13px;
  font-weight:600;
  letter-spacing:.06em;
  color:var(--c-accent);
  margin-bottom:12px;
}
.section-head{display:flex;flex-wrap:wrap;align-items:flex-end;justify-content:space-between;gap:24px;margin-bottom:40px}
.section-head h2{font-size:clamp(24px,2.6vw,34px)}
.section-head p{max-width:720px;margin-top:12px;font-size:15px;color:var(--c-ink2)}

.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:48px;padding:0 24px;border-radius:var(--r-sm);
  font-size:15px;font-weight:600;letter-spacing:.01em;
  transition:transform var(--ease),background-color var(--ease),color var(--ease),border-color var(--ease),box-shadow var(--ease);
  border:1.5px solid transparent;
}
.btn--primary{background:var(--c-accent);color:#fff;box-shadow:0 8px 18px -12px rgba(217,96,47,.9)}
.btn--primary:hover{background:var(--c-accent-hover);transform:translateY(-1px);box-shadow:var(--sh-2)}
.btn--ghost{background:transparent;color:var(--c-primary);border-color:var(--c-primary)}
.btn--ghost:hover{background:var(--c-primary);color:#fff;transform:translateY(-1px)}
.btn--light{background:#fff;color:var(--c-primary-deep)}
.btn--light:hover{background:var(--c-accent-soft);transform:translateY(-1px)}
.btn--outline-light{background:transparent;color:#fff;border-color:rgba(255,255,255,.6)}
.btn--outline-light:hover{background:rgba(255,255,255,.14);border-color:#fff;transform:translateY(-1px)}
.btn--sm{height:40px;padding:0 18px;font-size:14px;border-radius:10px}
.btn:active{transform:translateY(0)}

.link-more{
  display:inline-flex;align-items:center;gap:6px;
  font-size:14px;font-weight:600;color:var(--c-accent);
  border-bottom:1px solid transparent;padding-bottom:2px;
  transition:border-color var(--ease),color var(--ease),transform var(--ease);
}
.link-more:hover{color:var(--c-accent-hover);border-bottom-color:var(--c-accent-hover);transform:translateY(-3px)}

.badge{
  display:inline-flex;align-items:center;gap:6px;
  padding:4px 12px;border-radius:var(--r-pill);
  font-size:12px;font-weight:600;line-height:1.6;
}
.badge--accent{background:var(--c-accent-soft);color:var(--c-accent-hover)}
.badge--teal{background:#E3EFEA;color:var(--c-teal)}
.badge--line{border:1px solid var(--c-line);color:var(--c-ink2);background:#fff}

/* ============ header ============ */
.site-header{
  position:sticky;top:0;z-index:80;
  background:rgba(251,247,242,.94);
  backdrop-filter:blur(12px);
  -webkit-backdrop-filter:blur(12px);
  border-bottom:1px solid transparent;
  transition:border-color var(--ease),box-shadow var(--ease);
}
.site-header.is-stuck{border-bottom-color:var(--c-line);box-shadow:0 8px 24px -20px rgba(18,59,54,.8)}
.nav-bar__inner{display:flex;align-items:center;justify-content:space-between;gap:16px;height:74px}
.logo{display:flex;align-items:center;gap:10px;min-width:0}
.logo__mark{
  flex:0 0 auto;width:40px;height:40px;border-radius:13px;
  background:linear-gradient(160deg,var(--c-primary),var(--c-teal));
  color:#fff;display:grid;place-items:center;font-size:18px;font-weight:700;
}
.logo__text{min-width:0}
.logo__text strong{display:block;font-size:16px;line-height:1.25;color:var(--c-primary-deep);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.logo__text small{display:block;font-size:12px;line-height:1.4;color:var(--c-ink2);letter-spacing:.02em}
.nav-actions{display:flex;align-items:center;gap:20px}
.nav-link{font-size:14px;color:var(--c-ink2);transition:color var(--ease)}
.nav-link:hover{color:var(--c-accent)}
.nav-toggle{
  display:none;width:42px;height:42px;border-radius:12px;border:1px solid var(--c-line);
  background:#fff;place-items:center;
}
.nav-toggle span{display:block;width:18px;height:2px;background:var(--c-primary);border-radius:2px;position:relative}
.nav-toggle span::before,.nav-toggle span::after{content:"";position:absolute;left:0;width:18px;height:2px;background:var(--c-primary);border-radius:2px}
.nav-toggle span::before{top:-6px}
.nav-toggle span::after{top:6px}

.nav-tabs{border-top:1px solid var(--c-line)}
.nav-tabs__inner{display:flex;gap:8px;overflow-x:auto;padding:10px 24px;scrollbar-width:none}
.nav-tabs__inner::-webkit-scrollbar{display:none}
.tab{
  display:inline-flex;align-items:center;gap:7px;white-space:nowrap;
  padding:8px 16px;border-radius:var(--r-pill);background:var(--c-tint);
  font-size:14px;color:var(--c-ink2);transition:background var(--ease),color var(--ease),transform var(--ease);
}
.tab:hover{background:#E3EDE8;color:var(--c-primary);transform:translateY(-1px)}
.tab.is-active{background:var(--c-primary);color:#fff}
.tab.is-active::before{content:"";width:6px;height:6px;border-radius:50%;background:var(--c-accent)}

.mobile-drawer{
  position:fixed;inset:0;z-index:90;background:var(--c-bg);
  padding:20px 20px 32px;display:none;flex-direction:column;gap:4px;
  overflow-y:auto;
}
.mobile-drawer__top{display:flex;align-items:center;justify-content:space-between;margin-bottom:16px}
.drawer-close{width:42px;height:42px;border-radius:12px;border:1px solid var(--c-line);background:#fff;font-size:20px;color:var(--c-primary);display:grid;place-items:center}
.mobile-drawer a.drawer-link{
  display:flex;align-items:center;justify-content:space-between;
  min-height:52px;border-bottom:1px solid var(--c-line);font-size:15px;color:var(--c-ink);
}
.mobile-drawer a.drawer-link:hover{color:var(--c-accent)}
.mobile-drawer .btn{width:100%;margin-top:20px}
body.nav-open .mobile-drawer{display:flex}
body.nav-open{overflow:hidden}

/* ============ hero ============ */
.hero{
  position:relative;overflow:hidden;
  padding:88px 0 80px;
  background-image:linear-gradient(180deg,rgba(251,247,242,.94),rgba(251,247,242,.99)),url('/assets/images/5f45d3e79a698217.jpg');
  background-size:cover;background-position:center;
}
.hero::before{
  content:"";position:absolute;right:-160px;top:-180px;width:520px;height:520px;border-radius:50%;
  background:radial-gradient(circle,rgba(18,59,54,.13),rgba(18,59,54,0) 68%);
  pointer-events:none;
}
.hero__grid{position:relative;display:grid;grid-template-columns:1.12fr .88fr;gap:52px;align-items:center}
.hero__tagline{display:inline-flex;align-items:center;gap:8px;padding:6px 14px;border-radius:var(--r-pill);background:#fff;border:1px solid var(--c-line);font-size:13px;color:var(--c-teal);box-shadow:var(--sh-1)}
.hero__tagline i{width:6px;height:6px;border-radius:50%;background:var(--c-accent);display:block}
.hero h1{
  margin-top:20px;
  font-size:clamp(30px,4.4vw,52px);
  line-height:1.18;
  letter-spacing:-.015em;
  color:var(--c-primary-deep);
}
.hero h1 em{font-style:normal;color:var(--c-accent)}
.hero__lead{margin-top:20px;font-size:16px;line-height:1.85;color:var(--c-ink2);max-width:620px}
.hero__actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:30px}
.hero__badges{display:flex;flex-wrap:wrap;gap:10px;margin-top:26px}
.hero__badges li{display:inline-flex;align-items:center;gap:7px;font-size:13px;color:var(--c-ink2)}
.hero__badges li::before{content:"";width:7px;height:7px;border-radius:50%;background:var(--c-teal);flex:0 0 auto}

.hero-panel{
  background:var(--c-surface);border:1px solid var(--c-line);border-radius:20px;
  padding:28px;box-shadow:var(--sh-2);
}
.hero-panel__top{display:flex;align-items:center;gap:20px}
.ring{
  flex:0 0 auto;width:132px;height:132px;border-radius:50%;
  background:conic-gradient(var(--c-accent) 0 68%,#EAE3D8 68% 100%);
  display:grid;place-items:center;
}
.ring__inner{
  width:104px;height:104px;border-radius:50%;background:#fff;
  display:grid;place-items:center;text-align:center;line-height:1.3;
}
.ring__inner strong{display:block;font-size:22px;color:var(--c-primary)}
.ring__inner span{display:block;font-size:11px;color:var(--c-ink2)}
.hero-panel__meta h3{font-size:16px}
.hero-panel__meta p{font-size:13px;color:var(--c-ink2);margin-top:6px}
.tier-list{margin-top:22px;display:grid;gap:10px}
.tier{
  display:flex;align-items:center;justify-content:space-between;gap:12px;
  padding:12px 14px;border-radius:var(--r-sm);background:var(--c-tint);
  border:1px solid transparent;transition:border-color var(--ease),background var(--ease);
}
.tier:hover{border-color:rgba(217,96,47,.35);background:#fff}
.tier__name{font-size:14px;font-weight:600;color:var(--c-primary-deep)}
.tier__note{font-size:12px;color:var(--c-ink2)}
.tier__dot{width:8px;height:8px;border-radius:50%;background:var(--c-teal);flex:0 0 auto}
.tier--hot .tier__dot{background:var(--c-accent)}
.hero-panel .btn{width:100%;margin-top:20px}

/* ============ metrics ============ */
.metrics{background:var(--c-tint);padding:56px 0;border-top:1px solid var(--c-line);border-bottom:1px solid var(--c-line)}
.metrics__head{display:flex;flex-wrap:wrap;align-items:baseline;gap:14px;margin-bottom:28px}
.metrics__head h2{font-size:22px}
.metrics__head p{font-size:14px;color:var(--c-ink2)}
.metrics__grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.metric{border-left:3px solid var(--c-teal);padding-left:16px}
.metric:nth-child(2){border-left-color:var(--c-accent)}
.metric__num{display:block;font-size:34px;font-weight:700;color:var(--c-primary);line-height:1.1}
.metric__num small{font-size:15px;font-weight:600;margin-left:4px;color:var(--c-ink2)}
.metric__label{display:block;margin-top:8px;font-size:14px;font-weight:600;color:var(--c-ink)}
.metric p{font-size:13px;color:var(--c-ink2);margin-top:4px}

/* ============ download ============ */
.dl-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.dl-card{
  background:var(--c-surface);border:1px solid var(--c-line);border-radius:var(--r-card);
  padding:28px;display:flex;flex-direction:column;gap:12px;
  transition:border-color var(--ease),box-shadow var(--ease),transform var(--ease);
}
.dl-card:hover{border-color:rgba(217,96,47,.3);box-shadow:var(--sh-2);transform:translateY(-2px)}
.dl-card__icon{
  width:48px;height:48px;border-radius:14px;background:var(--c-tint);
  display:grid;place-items:center;color:var(--c-primary);
}
.dl-card h3{font-size:18px}
.dl-card p{font-size:14px;color:var(--c-ink2);line-height:1.75}
.dl-card__file{font-size:12px;color:var(--c-ink2);letter-spacing:.04em}
.dl-card .btn{margin-top:auto;width:100%}
.dl-note{
  margin-top:22px;display:flex;align-items:flex-start;gap:10px;
  padding:14px 18px;border-radius:var(--r-sm);background:#FFF9EC;border-left:3px solid #F2B441;
  font-size:13px;color:var(--c-ink2);
}
.dl-note::before{content:"";flex:0 0 auto;width:8px;height:8px;border-radius:50%;background:#F2B441;margin-top:8px}

/* ============ features ============ */
.feature-wrap{display:grid;grid-template-columns:.78fr 1.22fr;gap:48px;align-items:start}
.feature-intro h2{font-size:clamp(24px,2.6vw,34px)}
.feature-intro p{margin-top:16px;font-size:15px;color:var(--c-ink2)}
.feature-intro .btn{margin-top:26px}
.feature-grid{display:grid;grid-template-columns:1fr 1fr;gap:20px}
.feature-card{
  background:var(--c-surface);border:1px solid var(--c-line);border-radius:var(--r-card);
  padding:26px;transition:border-color var(--ease),box-shadow var(--ease),transform var(--ease);
}
.feature-card:hover{border-color:rgba(217,96,47,.3);box-shadow:var(--sh-2);transform:translateY(-2px)}
.feature-card:nth-child(2){margin-top:28px}
.feature-card:nth-child(4){margin-top:-4px}
.feature-card__icon{
  width:44px;height:44px;border-radius:13px;background:var(--c-accent-soft);
  display:grid;place-items:center;color:var(--c-accent-hover);margin-bottom:16px;
}
.feature-card h3{font-size:17px}
.feature-card ul{margin-top:14px;display:grid;gap:8px}
.feature-card li{position:relative;padding-left:16px;font-size:14px;color:var(--c-ink2)}
.feature-card li::before{content:"";position:absolute;left:0;top:11px;width:7px;height:2px;background:var(--c-teal);border-radius:2px}

/* ============ cities ============ */
.region-tabs{display:flex;flex-wrap:wrap;gap:10px;margin-bottom:26px}
.region-tab{
  padding:8px 18px;border-radius:var(--r-pill);border:1px solid var(--c-line);
  background:#fff;font-size:14px;color:var(--c-ink2);transition:all var(--ease);
}
.region-tab:hover{border-color:var(--c-teal);color:var(--c-primary)}
.region-tab.is-active{background:var(--c-primary);border-color:var(--c-primary);color:#fff}
.city-group{display:none}
.city-group.is-active{display:block}
.city-chips{display:flex;flex-wrap:wrap;gap:10px}
.city-chip{
  padding:9px 18px;border-radius:var(--r-pill);background:var(--c-surface);
  border:1px solid var(--c-line);font-size:14px;color:var(--c-ink);
  transition:border-color var(--ease),color var(--ease),transform var(--ease),background var(--ease);
}
.city-chip:hover{border-color:var(--c-accent);color:var(--c-accent-hover);background:var(--c-accent-soft);transform:translateY(-2px)}
.city-foot{margin-top:26px;font-size:14px;color:var(--c-ink2)}

/* ============ scenes ============ */
.scene-grid{display:grid;grid-template-columns:1fr 1fr;gap:22px}
.scene-card{
  display:grid;grid-template-columns:150px 1fr;gap:20px;align-items:center;
  background:var(--c-surface);border:1px solid var(--c-line);border-radius:var(--r-card);
  padding:18px;transition:border-color var(--ease),transform var(--ease),box-shadow var(--ease);
}
.scene-card:hover{border-color:var(--c-accent);transform:translate(2px,-2px);box-shadow:var(--sh-1)}
.scene-card:nth-child(2){margin-top:34px}
.scene-card:nth-child(3){margin-top:-18px}
.scene-card__img{aspect-ratio:4/3;overflow:hidden;border-radius:var(--r-img);background:var(--c-tint)}
.scene-card__img img{width:100%;height:100%;object-fit:cover}
.scene-card h3{font-size:17px}
.scene-card p{margin-top:8px;font-size:14px;color:var(--c-ink2);line-height:1.7}

/* ============ steps ============ */
.steps-wrap{display:grid;grid-template-columns:.9fr 1.1fr;gap:48px;align-items:center}
.step{display:flex;gap:18px;padding:18px 0;border-bottom:1px dashed var(--c-line)}
.step:last-child{border-bottom:0}
.step__num{font-size:22px;font-weight:700;color:var(--c-accent);line-height:1.2;flex:0 0 auto;letter-spacing:.02em}
.step h3{font-size:16px}
.step p{margin-top:6px;font-size:14px;color:var(--c-ink2)}
.shots{display:flex;gap:16px;overflow-x:auto;padding-bottom:12px;scroll-snap-type:x mandatory;scrollbar-width:none}
.shots::-webkit-scrollbar{display:none}
.shot{
  flex:0 0 200px;scroll-snap-align:start;background:var(--c-surface);
  border:1px solid var(--c-line);border-radius:var(--r-card);padding:12px;
}
.shot__img{aspect-ratio:9/16;overflow:hidden;border-radius:var(--r-img);background:var(--c-tint)}
.shot__img img{width:100%;height:100%;object-fit:cover}
.shot span{display:block;margin-top:10px;font-size:13px;text-align:center;color:var(--c-ink2)}

/* ============ forums ============ */
.forum-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.forum-card{
  display:flex;align-items:center;justify-content:space-between;gap:16px;
  background:var(--c-surface);border:1px solid var(--c-line);border-radius:var(--r-card);
  padding:22px 24px;transition:border-color var(--ease),box-shadow var(--ease);
}
.forum-card:hover{border-color:rgba(217,96,47,.3);box-shadow:var(--sh-2)}
.forum-card h3{font-size:16px}
.forum-card p{margin-top:6px;font-size:13px;color:var(--c-ink2)}
.forum-card__arrow{flex:0 0 auto;color:var(--c-accent);transition:transform var(--ease)}
.forum-card:hover .forum-card__arrow{transform:translateX(4px)}

/* ============ cases ============ */
.case-list{display:grid;gap:18px}
.case-card{
  display:grid;grid-template-columns:56px 1fr auto;gap:20px;align-items:center;
  background:var(--c-surface);border:1px solid var(--c-line);border-radius:var(--r-card);padding:24px;
}
.case-card__quote{font-size:44px;line-height:1;color:rgba(18,59,54,.16);font-family:Georgia,serif}
.case-card h3{font-size:17px}
.case-card p{margin-top:8px;font-size:14px;color:var(--c-ink2)}

/* ============ plans ============ */
.plan-switch{display:inline-flex;padding:5px;background:var(--c-tint);border-radius:var(--r-pill);gap:4px;margin-bottom:32px}
.plan-switch span{padding:8px 20px;border-radius:var(--r-pill);font-size:14px;color:var(--c-ink2);cursor:default}
.plan-switch span.is-active{background:var(--c-primary);color:#fff}
.plan-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;align-items:start}
.plan{
  position:relative;background:var(--c-surface);border:1px solid var(--c-line);
  border-radius:var(--r-card);padding:30px;transition:box-shadow var(--ease),transform var(--ease),border-color var(--ease);
}
.plan:hover{box-shadow:var(--sh-2);transform:translateY(-2px)}
.plan--hot{border:1.5px solid var(--c-accent);transform:translateY(-8px);box-shadow:var(--sh-2)}
.plan--hot:hover{transform:translateY(-10px)}
.plan__flag{
  position:absolute;top:-13px;right:22px;background:var(--c-accent);color:#fff;
  font-size:12px;font-weight:600;padding:3px 12px;border-radius:var(--r-pill);
}
.plan h3{font-size:18px}
.plan__scope{margin-top:6px;font-size:13px;color:var(--c-ink2)}
.plan__price{margin-top:18px;font-size:26px;font-weight:700;color:var(--c-primary);letter-spacing:-.01em}
.plan__price small{font-size:13px;font-weight:500;color:var(--c-ink2);margin-left:6px}
.plan ul{margin-top:20px;display:grid;gap:10px}
.plan li{display:flex;gap:10px;font-size:14px;color:var(--c-ink2)}
.plan li svg{flex:0 0 auto;margin-top:5px;color:var(--c-teal)}
.plan .btn{width:100%;margin-top:24px}

/* ============ feedback ============ */
.fb-grid{columns:3;column-gap:20px}
.fb-card{
  break-inside:avoid;margin-bottom:20px;background:var(--c-surface);
  border:1px solid var(--c-line);border-radius:var(--r-card);padding:22px;
  transition:border-color var(--ease),box-shadow var(--ease);
}
.fb-card:hover{border-color:rgba(217,96,47,.3);box-shadow:var(--sh-1)}
.fb-card__top{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-bottom:12px}
.fb-card__top strong{font-size:14px;color:var(--c-primary-deep)}
.fb-card p{font-size:14px;color:var(--c-ink2);line-height:1.75}

/* ============ quote bar ============ */
.quote-bar{display:grid;grid-template-columns:200px 1fr;gap:40px;align-items:center}
.quote-bar__big{font-size:48px;font-weight:700;color:var(--c-primary);line-height:1.1}
.quote-bar__big span{display:block;font-size:14px;font-weight:500;color:var(--c-ink2);margin-top:8px}
.quote-list{display:grid;grid-template-columns:repeat(3,1fr);gap:0}
.quote-item{padding:0 24px;border-left:1px solid var(--c-line)}
.quote-item:first-child{border-left:0;padding-left:0}
.quote-item p{font-size:14px;color:var(--c-ink)}
.quote-item span{display:block;margin-top:10px;font-size:13px;color:var(--c-ink2)}

/* ============ news ============ */
.news-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.news-card{
  background:var(--c-surface);border:1px solid var(--c-line);border-radius:var(--r-card);
  overflow:hidden;transition:border-color var(--ease),box-shadow var(--ease),transform var(--ease);
}
.news-card:hover{border-color:rgba(217,96,47,.3);box-shadow:var(--sh-2);transform:translateY(-2px)}
.news-card__link{display:flex;flex-direction:column;height:100%}
.news-card__thumb{aspect-ratio:16/10;overflow:hidden;background:var(--c-tint)}
.news-card__thumb img{width:100%;height:100%;object-fit:cover;border-radius:0;transition:transform 320ms ease}
.news-card:hover .news-card__thumb img{transform:scale(1.04)}
.news-card__body{padding:20px 22px 22px;display:flex;flex-direction:column;gap:10px;flex:1}
.news-card__title{font-size:16px;line-height:1.55;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.news-card__excerpt{
  font-size:13px;color:var(--c-ink2);line-height:1.75;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
}
.news-card__meta{margin-top:auto;display:flex;align-items:center;justify-content:space-between;font-size:12px;color:var(--c-ink2)}
.news-card__more{color:var(--c-accent);font-weight:600}
.empty-state{
  text-align:center;padding:56px 24px;border:1px dashed var(--c-line);border-radius:var(--r-card);
  background:var(--c-surface);
}
.empty-state svg{margin:0 auto 16px;color:var(--c-ink2);opacity:.7}
.empty-state p{font-size:15px;color:var(--c-ink2);margin-bottom:20px}

/* ============ faq ============ */
.faq{max-width:900px;margin:0 auto;display:grid;gap:12px}
.faq__item{background:var(--c-surface);border:1px solid var(--c-line);border-radius:var(--r-sm);overflow:hidden;transition:border-color var(--ease)}
.faq__item.is-open{border-color:rgba(217,96,47,.4)}
.faq__q{
  width:100%;display:flex;align-items:center;justify-content:space-between;gap:16px;
  padding:18px 22px;text-align:left;font-size:15px;font-weight:600;color:var(--c-primary-deep);
}
.faq__q:hover{color:var(--c-accent-hover)}
.faq__sign{position:relative;flex:0 0 auto;width:16px;height:16px}
.faq__sign::before,.faq__sign::after{content:"";position:absolute;background:var(--c-accent);border-radius:2px;transition:transform var(--ease),opacity var(--ease)}
.faq__sign::before{left:0;top:7px;width:16px;height:2px}
.faq__sign::after{left:7px;top:0;width:2px;height:16px}
.faq__item.is-open .faq__sign::after{transform:rotate(90deg);opacity:0}
.faq__a{max-height:0;overflow:hidden;transition:max-height 260ms ease}
.faq__a p{padding:0 22px 20px;font-size:14px;line-height:1.85;color:var(--c-ink2)}
.faq__item.is-open .faq__a{max-height:420px}

/* ============ cta ============ */
.cta-box{
  background:var(--c-primary);border-radius:20px;padding:56px;
  display:grid;grid-template-columns:1.1fr .9fr;gap:32px;align-items:center;
}
.cta-box h2{color:#fff;font-size:clamp(24px,2.6vw,32px)}
.cta-box p{margin-top:14px;font-size:15px;color:rgba(255,255,255,.78);max-width:520px}
.cta-box__actions{display:flex;flex-wrap:wrap;gap:14px;justify-content:flex-end}
.cta-box__note{margin-top:18px;display:flex;align-items:center;gap:8px;font-size:13px;color:rgba(255,255,255,.7)}
.cta-box__note::before{content:"";width:8px;height:8px;border-radius:50%;background:#F2B441}

/* ============ footer ============ */
.site-footer{background:var(--c-primary-deep);color:#fff;padding:72px 0 0;margin-top:0}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1.1fr;gap:40px;padding-bottom:48px}
.footer-brand .logo__text strong{color:#fff}
.footer-brand .logo__text small{color:rgba(255,255,255,.6)}
.footer-brand .logo__mark{background:rgba(255,255,255,.12);color:#fff}
.footer-brand p{margin-top:18px;font-size:13px;line-height:1.85;color:rgba(255,255,255,.65);max-width:320px}
.footer-col h3{font-size:14px;color:#fff;letter-spacing:.04em;margin-bottom:16px}
.footer-col ul{display:grid;gap:10px}
.footer-col a{font-size:13px;color:rgba(255,255,255,.66);transition:color var(--ease)}
.footer-col a:hover{color:var(--c-accent-soft)}
.footer-bottom{
  border-top:1px solid rgba(255,255,255,.14);padding:22px 0;
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:14px;
  font-size:13px;color:rgba(255,255,255,.55);
}
.to-top{
  display:inline-flex;align-items:center;gap:8px;font-size:13px;color:rgba(255,255,255,.75);
  border:1px solid rgba(255,255,255,.25);border-radius:var(--r-pill);padding:7px 16px;
  transition:background var(--ease),color var(--ease),border-color var(--ease);
}
.to-top:hover{background:rgba(255,255,255,.12);color:#fff;border-color:rgba(255,255,255,.5)}

/* ============ responsive ============ */
@media(max-width:1199px){
  .container{padding:0 22px}
  .hero__grid{gap:40px}
  .feature-wrap{gap:36px}
}
@media(max-width:991px){
  .section{padding:72px 0}
  .hero{padding:64px 0 60px}
  .hero__grid{grid-template-columns:1fr;gap:36px}
  .hero-panel{max-width:520px}
  .metrics__grid{grid-template-columns:repeat(2,1fr);gap:24px}
  .dl-grid{grid-template-columns:1fr;gap:16px}
  .feature-wrap{grid-template-columns:1fr;gap:32px}
  .feature-card:nth-child(2){margin-top:0}
  .feature-card:nth-child(4){margin-top:0}
  .scene-grid{grid-template-columns:1fr}
  .scene-card:nth-child(2),.scene-card:nth-child(3){margin-top:0}
  .steps-wrap{grid-template-columns:1fr;gap:32px}
  .forum-grid{grid-template-columns:1fr 1fr}
  .plan-grid{grid-template-columns:1fr;gap:18px}
  .plan--hot{transform:none}
  .plan--hot:hover{transform:translateY(-2px)}
  .fb-grid{columns:2}
  .quote-bar{grid-template-columns:1fr;gap:24px}
  .quote-list{grid-template-columns:1fr;gap:20px}
  .quote-item{border-left:0;padding:0;border-top:1px solid var(--c-line);padding-top:18px}
  .quote-item:first-child{border-top:0;padding-top:0}
  .news-grid{grid-template-columns:1fr 1fr}
  .cta-box{grid-template-columns:1fr;padding:40px;gap:24px}
  .cta-box__actions{justify-content:flex-start}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px}
  .nav-actions .nav-link{display:none}
  .nav-toggle{display:grid}
}
@media(max-width:767px){
  .section{padding:56px 0}
  .container{padding:0 16px}
  .nav-tabs__inner{padding:10px 16px}
  .logo__text strong{font-size:15px;max-width:180px}
  .hero__actions .btn{flex:1 1 100%}
  .section-head{margin-bottom:28px}
  .forum-grid{grid-template-columns:1fr}
  .news-grid{grid-template-columns:1fr}
  .fb-grid{columns:1}
  .metrics__grid{grid-template-columns:1fr 1fr;gap:20px}
  .metric__num{font-size:28px}
  .case-card{grid-template-columns:1fr;gap:14px}
  .case-card__quote{display:none}
  .plan{padding:24px}
  .cta-box{padding:32px 24px;border-radius:16px}
  .cta-box__actions .btn{width:100%}
  .footer-grid{grid-template-columns:1fr;gap:28px}
  .scene-card{grid-template-columns:1fr}
  .scene-card__img{aspect-ratio:16/9}
  .shot{flex:0 0 168px}
  .hero-panel{padding:22px}
  .ring{width:112px;height:112px}
  .ring__inner{width:88px;height:88px}
  .ring__inner strong{font-size:19px}
}
@media(max-width:520px){
  .hero{padding:48px 0 48px}
  .hero__badges{gap:8px 14px}
  .dl-card{padding:22px}
  .feature-grid{grid-template-columns:1fr}
  .region-tab{padding:7px 14px;font-size:13px}
  .city-chip{padding:8px 14px;font-size:13px}
  .metrics__grid{grid-template-columns:1fr}
  .footer-bottom{flex-direction:column;align-items:flex-start}
}

/* roulang page: article */
:root{
  --c-primary:#123B36;
  --c-primary-deep:#0C2A26;
  --c-accent:#D9602F;
  --c-accent-hover:#B94E23;
  --c-accent-soft:#FBE4D6;
  --c-teal:#2F6D62;
  --c-bg:#FBF7F2;
  --c-surface:#FFFFFF;
  --c-tint:#F1F5F2;
  --c-line:#E7DFD5;
  --c-ink:#1B2320;
  --c-ink2:#5C6A66;
  --r-card:16px;
  --r-sm:12px;
  --r-pill:999px;
  --r-img:14px;
  --sh-1:0 2px 4px rgba(18,59,54,.05);
  --sh-2:0 14px 32px -14px rgba(18,59,54,.22);
  --container:1200px;
  --ease:180ms ease;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  font-family:"PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",sans-serif;
  font-size:16px;line-height:1.75;color:var(--c-ink);background:var(--c-bg);
  font-variant-numeric:tabular-nums;
}
h1,h2,h3,h4{margin:0;line-height:1.25;letter-spacing:-.01em;color:var(--c-primary-deep)}
p{margin:0}
img{max-width:100%;display:block;border-radius:var(--r-img)}
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}
:focus-visible{outline:2px solid var(--c-accent);outline-offset:2px}
.container{width:100%;max-width:var(--container);margin:0 auto;padding:0 24px}
.section{padding:96px 0}
.section--tint{background:var(--c-tint)}
.section--surface{background:var(--c-surface)}
.eyebrow{display:inline-block;font-size:13px;font-weight:600;letter-spacing:.06em;color:var(--c-accent);margin-bottom:12px}
.section-head{display:flex;flex-wrap:wrap;align-items:flex-end;justify-content:space-between;gap:24px;margin-bottom:36px}
.section-head h2{font-size:clamp(24px,2.6vw,34px)}
.section-head p{max-width:700px;margin-top:10px;font-size:15px;color:var(--c-ink2)}
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:48px;padding:0 24px;border-radius:var(--r-sm);
  font-size:15px;font-weight:600;letter-spacing:.01em;border:1.5px solid transparent;
  transition:transform var(--ease),background-color var(--ease),color var(--ease),border-color var(--ease),box-shadow var(--ease);
}
.btn--primary{background:var(--c-accent);color:#fff;box-shadow:0 8px 18px -12px rgba(217,96,47,.9)}
.btn--primary:hover{background:var(--c-accent-hover);transform:translateY(-1px);box-shadow:var(--sh-2)}
.btn--ghost{background:transparent;color:var(--c-primary);border-color:var(--c-primary)}
.btn--ghost:hover{background:var(--c-primary);color:#fff;transform:translateY(-1px)}
.btn--light{background:#fff;color:var(--c-primary-deep)}
.btn--light:hover{background:var(--c-accent-soft);transform:translateY(-1px)}
.btn--outline-light{background:transparent;color:#fff;border-color:rgba(255,255,255,.6)}
.btn--outline-light:hover{background:rgba(255,255,255,.14);border-color:#fff;transform:translateY(-1px)}
.btn--sm{height:40px;padding:0 18px;font-size:14px;border-radius:10px}
.btn:active{transform:translateY(0)}
.badge{display:inline-flex;align-items:center;gap:6px;padding:4px 12px;border-radius:var(--r-pill);font-size:12px;font-weight:600;line-height:1.6}
.badge--accent{background:var(--c-accent-soft);color:var(--c-accent-hover)}
.badge--teal{background:#E3EFEA;color:var(--c-teal)}
.badge--line{border:1px solid var(--c-line);color:var(--c-ink2);background:#fff}
/* header */
.site-header{
  position:sticky;top:0;z-index:80;background:rgba(251,247,242,.94);
  backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);
  border-bottom:1px solid transparent;transition:border-color var(--ease),box-shadow var(--ease);
}
.site-header.is-stuck{border-bottom-color:var(--c-line);box-shadow:0 8px 24px -20px rgba(18,59,54,.8)}
.nav-bar__inner{display:flex;align-items:center;justify-content:space-between;gap:16px;height:74px}
.logo{display:flex;align-items:center;gap:10px;min-width:0}
.logo__mark{
  flex:0 0 auto;width:40px;height:40px;border-radius:13px;
  background:linear-gradient(160deg,var(--c-primary),var(--c-teal));
  color:#fff;display:grid;place-items:center;font-size:18px;font-weight:700;
}
.logo__text{min-width:0}
.logo__text strong{display:block;font-size:16px;line-height:1.25;color:var(--c-primary-deep);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.logo__text small{display:block;font-size:12px;line-height:1.4;color:var(--c-ink2);letter-spacing:.02em}
.nav-actions{display:flex;align-items:center;gap:18px}
.nav-link{font-size:14px;color:var(--c-ink2);transition:color var(--ease)}
.nav-link:hover{color:var(--c-accent)}
.nav-toggle{display:none;width:42px;height:42px;border-radius:12px;border:1px solid var(--c-line);background:#fff;place-items:center}
.nav-toggle span{display:block;width:18px;height:2px;background:var(--c-primary);border-radius:2px;position:relative}
.nav-toggle span::before,.nav-toggle span::after{content:"";position:absolute;left:0;width:18px;height:2px;background:var(--c-primary);border-radius:2px}
.nav-toggle span::before{top:-6px}
.nav-toggle span::after{top:6px}
.nav-tabs{border-top:1px solid var(--c-line)}
.nav-tabs__inner{display:flex;gap:8px;overflow-x:auto;padding:10px 24px;scrollbar-width:none}
.nav-tabs__inner::-webkit-scrollbar{display:none}
.tab{
  display:inline-flex;align-items:center;gap:6px;height:38px;padding:0 16px;border-radius:var(--r-pill);
  background:var(--c-tint);color:var(--c-ink2);font-size:14px;font-weight:500;white-space:nowrap;
  transition:background-color var(--ease),color var(--ease),transform var(--ease);
}
.tab:hover{background:#E3EAE5;color:var(--c-primary);transform:translateY(-1px)}
.tab.is-active{background:var(--c-primary);color:#fff}
.tab.is-active::before{content:"";width:6px;height:6px;border-radius:50%;background:var(--c-accent)}
.mobile-drawer{
  position:fixed;inset:0;z-index:90;background:var(--c-bg);padding:20px 20px 32px;
  display:none;flex-direction:column;gap:4px;overflow-y:auto;
}
.mobile-drawer__top{display:flex;align-items:center;justify-content:space-between;margin-bottom:16px}
.drawer-close{width:42px;height:42px;border-radius:12px;border:1px solid var(--c-line);background:#fff;font-size:20px;color:var(--c-primary);display:grid;place-items:center}
.mobile-drawer a.drawer-link{display:flex;align-items:center;justify-content:space-between;min-height:52px;border-bottom:1px solid var(--c-line);font-size:15px;color:var(--c-ink)}
.mobile-drawer a.drawer-link:hover{color:var(--c-accent)}
.mobile-drawer .btn{width:100%;margin-top:20px}
body.nav-open .mobile-drawer{display:flex}
body.nav-open{overflow:hidden}
/* article band */
.article-band{position:relative;overflow:hidden;background:var(--c-tint);border-bottom:1px solid var(--c-line);padding:26px 0 28px}
.article-band::after{
  content:"";position:absolute;inset:0;pointer-events:none;opacity:.55;
  background-image:linear-gradient(rgba(18,59,54,.06) 1px,transparent 1px),linear-gradient(90deg,rgba(18,59,54,.06) 1px,transparent 1px);
  background-size:34px 34px;
}
.article-band .container{position:relative;z-index:1}
.breadcrumb{display:flex;flex-wrap:wrap;align-items:center;gap:8px;font-size:13px;color:var(--c-ink2)}
.breadcrumb a{transition:color var(--ease)}
.breadcrumb a:hover{color:var(--c-accent)}
.breadcrumb .sep{color:#BFB6AA}
.breadcrumb .now{color:var(--c-primary);font-weight:600}
.band-title{display:flex;flex-wrap:wrap;align-items:center;gap:12px;margin-top:14px}
.band-title h2{font-size:18px;font-weight:600;color:var(--c-primary)}
.band-title span{font-size:13px;color:var(--c-ink2)}
/* layout */
.article-wrap{padding:52px 0 88px}
.article-layout{display:grid;grid-template-columns:minmax(0,1fr) 320px;gap:48px;align-items:start}
.article{min-width:0}
.article-head{padding-bottom:26px;border-bottom:1px solid var(--c-line)}
.article-head h1{font-size:clamp(26px,3.4vw,40px);line-height:1.3}
.article-meta{display:flex;flex-wrap:wrap;align-items:center;gap:10px 18px;margin-top:20px;font-size:13px;color:var(--c-ink2)}
.article-meta .dot{width:4px;height:4px;border-radius:50%;background:#C9C0B4}
.article-cover{margin-top:26px;border-radius:var(--r-card);overflow:hidden;background:var(--c-tint);box-shadow:var(--sh-1)}
.article-cover img{width:100%;aspect-ratio:16/9;object-fit:cover;border-radius:0}
.article-body{font-size:16px;line-height:1.85;color:var(--c-ink);padding-top:34px;max-width:760px}
.article-body>*+*{margin-top:1.2em}
.article-body h2{font-size:22px;position:relative;padding-left:15px;margin-top:2.1em}
.article-body h2::before{content:"";position:absolute;left:0;top:.16em;bottom:.16em;width:3px;border-radius:2px;background:var(--c-accent)}
.article-body h3{font-size:18px;margin-top:1.8em;color:var(--c-primary)}
.article-body ul,.article-body ol{padding-left:1.4em}
.article-body ul li{list-style:disc}
.article-body ol li{list-style:decimal}
.article-body li+li{margin-top:.45em}
.article-body blockquote{margin:1.7em 0;padding:18px 22px;background:var(--c-tint);border-left:3px solid var(--c-teal);border-radius:0 var(--r-sm) var(--r-sm) 0;color:var(--c-ink2)}
.article-body img{margin:1.6em 0;border-radius:var(--r-img)}
.article-body figure{margin:1.7em 0}
.article-body figcaption{font-size:13px;color:var(--c-ink2);text-align:center;margin-top:8px}
.article-body a{color:var(--c-accent);text-decoration:underline;text-underline-offset:3px}
.article-body a:hover{color:var(--c-accent-hover)}
.article-body table{width:100%;border-collapse:collapse;font-size:14px;margin:1.7em 0}
.article-body th,.article-body td{border:1px solid var(--c-line);padding:10px 12px;text-align:left;vertical-align:top}
.article-body th{background:var(--c-tint);color:var(--c-primary);font-weight:600}
.article-body pre{overflow-x:auto;background:var(--c-primary-deep);color:#E6EFEB;padding:16px 18px;border-radius:var(--r-sm);font-size:13px;line-height:1.7}
.article-body code{font-family:ui-monospace,Menlo,Consolas,monospace;font-size:.92em}
.article-body hr{border:0;border-top:1px solid var(--c-line);margin:2em 0}
/* article foot */
.article-foot{margin-top:40px;padding-top:26px;border-top:1px solid var(--c-line);display:flex;flex-wrap:wrap;gap:20px;justify-content:space-between;align-items:flex-start}
.tag-list{display:flex;flex-wrap:wrap;gap:8px}
.tag{display:inline-flex;align-items:center;height:30px;padding:0 14px;border-radius:var(--r-pill);background:var(--c-tint);color:var(--c-teal);font-size:13px;border:1px solid transparent;transition:background-color var(--ease),border-color var(--ease),color var(--ease)}
.tag:hover{background:var(--c-accent-soft);border-color:#F3C7AF;color:var(--c-accent-hover)}
.share-group{display:flex;flex-wrap:wrap;gap:8px}
.share-btn{display:inline-flex;align-items:center;gap:6px;height:36px;padding:0 14px;border-radius:var(--r-sm);border:1px solid var(--c-line);background:#fff;font-size:13px;color:var(--c-ink2);transition:border-color var(--ease),color var(--ease),transform var(--ease)}
.share-btn:hover{border-color:#F3C7AF;color:var(--c-accent-hover);transform:translateY(-1px)}
.back-row{margin-top:34px;display:flex;flex-wrap:wrap;gap:12px}
/* sidebar */
.article-side{display:flex;flex-direction:column;gap:20px;position:sticky;top:110px}
.side-card{background:var(--c-surface);border:1px solid var(--c-line);border-radius:var(--r-card);padding:22px;box-shadow:var(--sh-1);transition:border-color var(--ease),box-shadow var(--ease)}
.side-card:hover{border-color:rgba(217,96,47,.35);box-shadow:var(--sh-2)}
.side-card h3{font-size:15px;margin-bottom:14px;display:flex;align-items:center;gap:8px}
.side-card h3::before{content:"";width:6px;height:6px;border-radius:50%;background:var(--c-accent)}
.side-list{display:flex;flex-direction:column;gap:2px}
.side-list a{display:flex;align-items:center;justify-content:space-between;gap:10px;padding:11px 10px;border-radius:10px;font-size:14px;color:var(--c-ink);transition:background-color var(--ease),color var(--ease)}
.side-list a:hover{background:var(--c-tint);color:var(--c-primary)}
.side-list a span{font-size:12px;color:var(--c-ink2)}
.side-info{font-size:13px;color:var(--c-ink2);display:flex;flex-direction:column;gap:10px}
.side-info div{display:flex;justify-content:space-between;gap:12px;padding-bottom:10px;border-bottom:1px dashed var(--c-line)}
.side-info div:last-child{border-bottom:0;padding-bottom:0}
.side-info b{color:var(--c-primary);font-weight:600}
.side-download{background:var(--c-primary-deep);border-color:var(--c-primary-deep);color:#fff}
.side-download h3{color:#fff}
.side-download p{font-size:13px;color:rgba(255,255,255,.72);line-height:1.7;margin-bottom:16px}
.side-download .btn{width:100%;margin-bottom:10px;height:44px;font-size:14px}
/* related */
.rel-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:20px}
.rel-card{background:var(--c-surface);border:1px solid var(--c-line);border-radius:var(--r-card);overflow:hidden;box-shadow:var(--sh-1);transition:transform var(--ease),box-shadow var(--ease),border-color var(--ease);display:flex;flex-direction:column}
.rel-card:hover{transform:translateY(-2px);border-color:rgba(217,96,47,.35);box-shadow:var(--sh-2)}
.rel-card__img{aspect-ratio:16/10;background:var(--c-tint);overflow:hidden}
.rel-card__img img{width:100%;height:100%;object-fit:cover;border-radius:0;transition:transform 320ms ease}
.rel-card:hover .rel-card__img img{transform:scale(1.04)}
.rel-card__body{padding:20px;display:flex;flex-direction:column;gap:10px;flex:1}
.rel-card__body h3{font-size:16px;line-height:1.5}
.rel-card__body p{font-size:13px;color:var(--c-ink2);line-height:1.7}
.rel-card__more{margin-top:auto;font-size:13px;color:var(--c-accent);font-weight:600}
/* guide list */
.guide-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:20px}
.guide-item{display:flex;gap:16px;background:var(--c-surface);border:1px solid var(--c-line);border-radius:var(--r-card);padding:22px;box-shadow:var(--sh-1);transition:border-color var(--ease),transform var(--ease)}
.guide-item:hover{border-color:rgba(217,96,47,.35);transform:translateY(-2px)}
.guide-num{flex:0 0 auto;width:40px;height:40px;border-radius:12px;background:var(--c-tint);color:var(--c-primary);display:grid;place-items:center;font-weight:700;font-size:15px}
.guide-item h3{font-size:15px;margin-bottom:6px}
.guide-item p{font-size:13px;color:var(--c-ink2);line-height:1.7}
.guide-item a{color:var(--c-accent);font-size:13px;font-weight:600}
.guide-item a:hover{color:var(--c-accent-hover)}
/* CTA */
.cta-box{background:var(--c-primary-deep);border-radius:20px;padding:40px;color:#fff;display:flex;align-items:center;justify-content:space-between;gap:32px;flex-wrap:wrap;position:relative;overflow:hidden}
.cta-box::before{content:"";position:absolute;right:-120px;top:-120px;width:340px;height:340px;border-radius:50%;background:radial-gradient(circle,rgba(217,96,47,.28),rgba(217,96,47,0) 70%);pointer-events:none}
.cta-box h2{color:#fff;font-size:clamp(22px,2.4vw,30px)}
.cta-box p{margin-top:10px;font-size:14px;color:rgba(255,255,255,.75);max-width:620px}
.cta-actions{display:flex;flex-wrap:wrap;gap:12px;position:relative;z-index:1}
.cta-note{margin-top:16px;display:flex;align-items:center;gap:8px;font-size:12px;color:rgba(255,255,255,.62)}
.cta-note::before{content:"";width:7px;height:7px;border-radius:50%;background:#F2B441}
/* empty */
.empty-state{text-align:center;padding:72px 24px;background:var(--c-surface);border:1px solid var(--c-line);border-radius:var(--r-card);box-shadow:var(--sh-1)}
.empty-state svg{width:56px;height:56px;margin:0 auto 18px;color:#C3BBAF}
.empty-state h3{font-size:20px;margin-bottom:10px}
.empty-state p{font-size:14px;color:var(--c-ink2);margin-bottom:22px}
/* footer */
.site-footer{background:var(--c-primary-deep);color:#fff;padding:72px 0 28px;margin-top:0}
.footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1.1fr;gap:40px}
.footer-brand .logo{margin-bottom:18px}
.footer-brand .logo__text strong{color:#fff}
.footer-brand .logo__text small{color:rgba(255,255,255,.6)}
.footer-brand .logo__mark{background:linear-gradient(160deg,#1E5A52,#2F6D62)}
.footer-brand p{font-size:13px;line-height:1.8;color:rgba(255,255,255,.66);max-width:340px}
.footer-col h3{font-size:15px;color:#fff;margin-bottom:16px}
.footer-col ul{display:flex;flex-direction:column;gap:10px}
.footer-col a{font-size:13px;color:rgba(255,255,255,.66);transition:color var(--ease)}
.footer-col a:hover{color:var(--c-accent-soft)}
.footer-bottom{margin-top:48px;padding-top:22px;border-top:1px solid rgba(255,255,255,.14);display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:12px;font-size:12px;color:rgba(255,255,255,.5)}
.to-top{color:rgba(255,255,255,.7)}
.to-top:hover{color:#fff}
/* responsive */
@media (max-width:1199px){
  .article-layout{grid-template-columns:minmax(0,1fr) 290px;gap:32px}
  .section{padding:72px 0}
}
@media (max-width:991px){
  .nav-actions .nav-link{display:none}
  .nav-toggle{display:grid}
  .article-layout{grid-template-columns:minmax(0,1fr)}
  .article-side{position:static;flex-direction:row;flex-wrap:wrap}
  .article-side>*{flex:1 1 260px}
  .rel-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px}
  .article-body{max-width:none}
}
@media (max-width:767px){
  .container{padding:0 16px}
  .section{padding:56px 0}
  .nav-bar__inner{height:64px}
  .nav-actions .btn--sm{padding:0 14px;font-size:13px}
  .article-wrap{padding:36px 0 64px}
  .article-side{flex-direction:column}
  .article-side>*{flex:1 1 auto}
  .rel-grid{grid-template-columns:minmax(0,1fr)}
  .guide-grid{grid-template-columns:minmax(0,1fr)}
  .cta-box{padding:28px}
  .cta-actions .btn{width:100%}
  .article-foot{flex-direction:column}
  .footer-grid{grid-template-columns:1fr;gap:26px}
  .article-body h2{font-size:20px}
}
@media (max-width:520px){
  .logo__text strong{font-size:14px}
  .logo__text small{font-size:11px}
  .article-head h1{font-size:23px}
  .band-title h2{font-size:16px}
  .btn{height:44px;padding:0 18px;font-size:14px}
}

/* roulang page: category1 */
:root{
  --c-primary:#123B36;
  --c-primary-deep:#0C2A26;
  --c-accent:#D9602F;
  --c-accent-hover:#B94E23;
  --c-accent-soft:#FBE4D6;
  --c-teal:#2F6D62;
  --c-bg:#FBF7F2;
  --c-surface:#FFFFFF;
  --c-tint:#F1F5F2;
  --c-line:#E7DFD5;
  --c-ink:#1B2320;
  --c-ink2:#5C6A66;
  --r-card:16px;
  --r-sm:12px;
  --r-pill:999px;
  --r-img:14px;
  --sh-1:0 2px 4px rgba(18,59,54,.05);
  --sh-2:0 14px 32px -14px rgba(18,59,54,.22);
  --container:1200px;
  --ease:180ms ease;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  font-family:"PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,-apple-system,"Segoe UI",sans-serif;
  font-size:16px;
  line-height:1.75;
  color:var(--c-ink);
  background:var(--c-bg);
  font-variant-numeric:tabular-nums;
}
h1,h2,h3,h4,p,figure,ul,ol{margin:0}
ul,ol{padding:0;list-style:none}
img{max-width:100%;display:block;border-radius:var(--r-img)}
a{color:inherit;text-decoration:none}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer}
:focus-visible{outline:2px solid var(--c-accent);outline-offset:2px}
h1{font-size:clamp(26px,3.4vw,42px);line-height:1.25;letter-spacing:-.01em;color:var(--c-primary-deep)}
h2{font-size:clamp(24px,2.6vw,34px);line-height:1.3;letter-spacing:-.01em;color:var(--c-primary-deep)}
h3{font-size:18px;line-height:1.45;color:var(--c-primary-deep)}
.container{width:100%;max-width:var(--container);margin:0 auto;padding:0 24px}
.section{padding:96px 0}
.section--tint{background:var(--c-tint)}
.section--surface{background:var(--c-surface)}
.eyebrow{display:inline-block;font-size:13px;font-weight:600;letter-spacing:.06em;color:var(--c-accent);margin-bottom:12px}
.section-head{display:flex;flex-wrap:wrap;align-items:flex-end;justify-content:space-between;gap:24px;margin-bottom:40px}
.section-head p{max-width:760px;margin-top:12px;font-size:15px;color:var(--c-ink2)}
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  height:48px;padding:0 24px;border-radius:var(--r-sm);
  font-size:15px;font-weight:600;letter-spacing:.01em;border:1.5px solid transparent;
  transition:transform var(--ease),background-color var(--ease),color var(--ease),border-color var(--ease),box-shadow var(--ease);
}
.btn--primary{background:var(--c-accent);color:#fff;box-shadow:0 8px 18px -12px rgba(217,96,47,.9)}
.btn--primary:hover{background:var(--c-accent-hover);transform:translateY(-1px);box-shadow:var(--sh-2)}
.btn--ghost{background:transparent;color:var(--c-primary);border-color:var(--c-primary)}
.btn--ghost:hover{background:var(--c-primary);color:#fff;transform:translateY(-1px)}
.btn--sm{height:40px;padding:0 18px;font-size:14px;border-radius:10px}
.btn:active{transform:translateY(0)}
.badge{display:inline-flex;align-items:center;gap:6px;padding:4px 12px;border-radius:var(--r-pill);font-size:12px;font-weight:600;line-height:1.6}
.badge--accent{background:var(--c-accent-soft);color:var(--c-accent-hover)}
.badge--teal{background:#E3EFEA;color:var(--c-teal)}

/* header */
.site-header{
  position:sticky;top:0;z-index:80;background:rgba(251,247,242,.94);
  backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);
  border-bottom:1px solid transparent;transition:border-color var(--ease),box-shadow var(--ease);
}
.site-header.is-stuck{border-bottom-color:var(--c-line);box-shadow:0 8px 24px -20px rgba(18,59,54,.8)}
.nav-bar__inner{display:flex;align-items:center;justify-content:space-between;gap:16px;height:74px}
.logo{display:flex;align-items:center;gap:10px;min-width:0}
.logo__mark{
  flex:0 0 auto;width:40px;height:40px;border-radius:13px;
  background:linear-gradient(160deg,var(--c-primary),var(--c-teal));
  color:#fff;display:grid;place-items:center;font-size:18px;font-weight:700;
}
.logo__text{min-width:0}
.logo__text strong{display:block;font-size:16px;line-height:1.25;color:var(--c-primary-deep);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.logo__text small{display:block;font-size:12px;line-height:1.4;color:var(--c-ink2);letter-spacing:.02em}
.nav-actions{display:flex;align-items:center;gap:12px}
.nav-toggle{display:none;width:42px;height:42px;border-radius:12px;border:1px solid var(--c-line);background:#fff;place-items:center}
.nav-toggle span{display:block;width:18px;height:2px;background:var(--c-primary);border-radius:2px;position:relative}
.nav-toggle span::before,.nav-toggle span::after{content:"";position:absolute;left:0;width:18px;height:2px;background:var(--c-primary);border-radius:2px}
.nav-toggle span::before{top:-6px}
.nav-toggle span::after{top:6px}
.nav-tabs{border-top:1px solid var(--c-line)}
.nav-tabs__inner{display:flex;gap:8px;overflow-x:auto;padding:10px 24px;scrollbar-width:none}
.nav-tabs__inner::-webkit-scrollbar{display:none}
.tab{
  display:inline-flex;align-items:center;gap:6px;padding:8px 18px;border-radius:var(--r-pill);
  background:var(--c-tint);color:var(--c-ink2);font-size:14px;font-weight:500;white-space:nowrap;
  transition:background-color var(--ease),color var(--ease),box-shadow var(--ease);
}
.tab:hover{background:#E3ECE7;color:var(--c-primary)}
.tab.is-active{background:var(--c-primary);color:#fff}
.tab.is-active::after{content:"";width:6px;height:6px;border-radius:50%;background:var(--c-accent)}
.mobile-drawer{
  position:fixed;inset:0;z-index:90;background:var(--c-bg);padding:20px 20px 32px;
  display:none;flex-direction:column;gap:4px;overflow-y:auto;
}
.mobile-drawer__top{display:flex;align-items:center;justify-content:space-between;margin-bottom:16px}
.drawer-close{width:42px;height:42px;border-radius:12px;border:1px solid var(--c-line);background:#fff;font-size:20px;color:var(--c-primary);display:grid;place-items:center}
.mobile-drawer a.drawer-link{display:flex;align-items:center;justify-content:space-between;min-height:52px;border-bottom:1px solid var(--c-line);font-size:15px;color:var(--c-ink)}
.mobile-drawer a.drawer-link:hover{color:var(--c-accent)}
.mobile-drawer .btn{width:100%;margin-top:20px}
body.nav-open .mobile-drawer{display:flex}
body.nav-open{overflow:hidden}

/* 分类页头 */
.page-band{
  position:relative;overflow:hidden;padding:52px 0 48px;border-bottom:1px solid var(--c-line);
  background:linear-gradient(rgba(241,245,242,.94),rgba(241,245,242,.94)),url('/assets/images/cbd38b1440ba2f4c.webp') center/cover no-repeat;
}
.page-band::after{
  content:"";position:absolute;inset:0;pointer-events:none;
  background-image:linear-gradient(rgba(18,59,54,.06) 1px,transparent 1px),linear-gradient(90deg,rgba(18,59,54,.06) 1px,transparent 1px);
  background-size:44px 44px;
  -webkit-mask-image:linear-gradient(90deg,transparent,#000 45%);
  mask-image:linear-gradient(90deg,transparent,#000 45%);
}
.page-band .container{position:relative;z-index:1}
.breadcrumb{display:flex;align-items:center;gap:8px;font-size:13px;color:var(--c-ink2);flex-wrap:wrap}
.breadcrumb a:hover{color:var(--c-accent)}
.breadcrumb span{color:#A9B4B0}
.page-band__grid{display:grid;grid-template-columns:1.35fr .65fr;gap:40px;align-items:end;margin-top:22px}
.page-band__desc{margin-top:14px;font-size:16px;color:var(--c-ink2);max-width:640px}
.band-stats{display:grid;gap:12px}
.band-stat{background:#fff;border:1px solid var(--c-line);border-radius:var(--r-sm);padding:14px 18px;box-shadow:var(--sh-1)}
.band-stat strong{display:block;font-size:15px;color:var(--c-primary)}
.band-stat span{font-size:13px;color:var(--c-ink2);line-height:1.6}

/* 筛选条 */
.filter-section{padding:26px 0;background:var(--c-surface);border-bottom:1px solid var(--c-line)}
.filter-bar{display:flex;flex-wrap:wrap;align-items:center;gap:14px 26px}
.filter-group{display:flex;align-items:center;gap:8px;flex-wrap:wrap}
.filter-label{font-size:13px;color:var(--c-ink2)}
.chip{
  padding:7px 15px;border-radius:var(--r-pill);border:1px solid var(--c-line);background:#fff;
  font-size:13px;color:var(--c-ink2);
  transition:background-color var(--ease),color var(--ease),border-color var(--ease);
}
.chip:hover{border-color:rgba(217,96,47,.55);color:var(--c-accent-hover)}
.chip.is-active{background:var(--c-primary);border-color:var(--c-primary);color:#fff}
.filter-count{margin-left:auto}

/* 列表 */
.post-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.post-card{
  background:#fff;border:1px solid var(--c-line);border-radius:var(--r-card);overflow:hidden;
  box-shadow:var(--sh-1);transition:transform var(--ease),box-shadow var(--ease),border-color var(--ease);
}
.post-card:hover{transform:translateY(-2px);box-shadow:var(--sh-2);border-color:rgba(217,96,47,.4)}
.post-card__link{display:block;height:100%}
.post-card__thumb{aspect-ratio:16/10;background:var(--c-tint);overflow:hidden}
.post-card__thumb img{width:100%;height:100%;object-fit:cover;border-radius:0;transition:transform 320ms ease}
.post-card:hover .post-card__thumb img{transform:scale(1.03)}
.post-card__body{padding:16px 20px 12px;display:flex;flex-direction:column;gap:10px}
.post-card__body .badge{align-self:flex-start}
.post-card__body h3{font-size:17px;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.post-card__body p{font-size:14px;color:var(--c-ink2);line-height:1.7;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.post-card__meta{
  margin:0 20px;padding:12px 0 16px;border-top:1px solid var(--c-line);
  display:flex;align-items:center;justify-content:space-between;gap:12px;font-size:12px;color:var(--c-ink2);
}
.post-card__meta em{font-style:normal;color:var(--c-accent-hover);font-weight:600}
.empty-state{
  background:var(--c-surface);border:1px dashed var(--c-line);border-radius:var(--r-card);
  padding:56px 24px;text-align:center;display:grid;justify-items:center;gap:14px;
}
.empty-state svg{width:46px;height:46px;stroke:var(--c-teal);fill:none;stroke-width:1.6}
.empty-state p{font-size:14px;color:var(--c-ink2)}
.list-more{display:flex;justify-content:center;margin-top:36px}

/* 区域 */
.region-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(250px,1fr));gap:20px}
.region-card{
  background:#fff;border:1px solid var(--c-line);border-radius:var(--r-card);padding:22px 22px 20px;
  box-shadow:var(--sh-1);transition:border-color var(--ease),transform var(--ease),box-shadow var(--ease);
}
.region-card:hover{border-color:rgba(217,96,47,.4);transform:translateY(-2px);box-shadow:var(--sh-2)}
.region-card h3{display:flex;align-items:center;gap:8px;font-size:17px;margin-bottom:8px}
.region-card h3::before{content:"";width:8px;height:8px;border-radius:50%;background:var(--c-accent);flex:0 0 auto}
.region-card p{font-size:14px;color:var(--c-ink2)}
.region-card ul{display:flex;flex-wrap:wrap;gap:6px;margin-top:14px}
.region-card li{font-size:12px;padding:3px 10px;border-radius:var(--r-pill);background:var(--c-tint);color:var(--c-teal)}

/* 场景 */
.scene-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:20px}
.scene-card{
  display:grid;grid-template-columns:180px 1fr;background:#fff;border:1px solid var(--c-line);
  border-radius:var(--r-card);overflow:hidden;
  transition:border-color var(--ease),transform var(--ease),box-shadow var(--ease);
}
.scene-card:hover{border-color:rgba(217,96,47,.45);transform:translateY(-2px);box-shadow:var(--sh-2)}
.scene-card img{width:100%;height:100%;object-fit:cover;border-radius:0}
.scene-card__body{padding:20px 22px}
.scene-card__body h3{font-size:17px;margin-bottom:8px}
.scene-card__body p{font-size:14px;color:var(--c-ink2)}
.scene-card__body .badge{margin-top:14px}

/* 说明 */
.notes-layout{display:grid;grid-template-columns:.92fr 1.08fr;gap:44px;align-items:center}
.notes-media img{width:100%;border-radius:var(--r-card);box-shadow:var(--sh-1)}
.notes-body h3{margin-bottom:8px}
.notes-body p{font-size:15px;color:var(--c-ink2);margin-bottom:24px}
.notes-body p:last-child{margin-bottom:0}

/* FAQ */
.faq-list{max-width:880px;display:grid;gap:12px}
.faq-item{background:#fff;border:1px solid var(--c-line);border-radius:var(--r-sm);overflow:hidden;transition:border-color var(--ease)}
.faq-item:hover{border-color:rgba(217,96,47,.35)}
.faq-q{
  width:100%;display:flex;align-items:center;justify-content:space-between;gap:16px;
  padding:18px 22px;text-align:left;font-size:15px;font-weight:600;color:var(--c-primary);
  transition:background-color var(--ease);
}
.faq-q:hover{background:var(--c-tint)}
.faq-icon{position:relative;width:16px;height:16px;flex:0 0 auto}
.faq-icon::before,.faq-icon::after{content:"";position:absolute;background:var(--c-accent);border-radius:2px}
.faq-icon::before{top:7px;left:0;width:16px;height:2px}
.faq-icon::after{top:0;left:7px;width:2px;height:16px;transition:transform var(--ease),opacity var(--ease)}
.faq-item.is-open .faq-icon::after{transform:rotate(90deg);opacity:0}
.faq-a{max-height:0;overflow:hidden;transition:max-height .28s ease}
.faq-a p{padding:0 22px 20px;font-size:14.5px;color:var(--c-ink2);line-height:1.85}
.faq-item.is-open .faq-a{max-height:400px}

/* CTA */
.cta-band{
  position:relative;overflow:hidden;background:var(--c-primary-deep);border-radius:20px;padding:56px;
  color:#fff;display:grid;grid-template-columns:1.05fr .95fr;gap:44px;align-items:center;
}
.cta-band::before{
  content:"";position:absolute;right:-120px;top:-140px;width:420px;height:420px;border-radius:50%;
  background:radial-gradient(circle,rgba(217,96,47,.28),rgba(217,96,47,0) 70%);pointer-events:none;
}
.cta-band__text{position:relative;z-index:1}
.cta-band h2{color:#fff}
.cta-band p{margin-top:14px;font-size:15px;color:rgba(255,255,255,.72);max-width:520px}
.cta-note{display:flex;align-items:flex-start;gap:8px;margin-top:22px;font-size:12.5px;color:rgba(255,255,255,.6);line-height:1.7}
.cta-note::before{content:"";flex:0 0 auto;width:8px;height:8px;border-radius:50%;background:#F2B441;margin-top:8px}
.dl-grid{position:relative;z-index:1;display:grid;gap:12px}
.dl-card{
  display:flex;align-items:center;justify-content:space-between;gap:16px;
  background:rgba(255,255,255,.08);border:1px solid rgba(255,255,255,.18);border-radius:var(--r-sm);
  padding:14px 18px;transition:background-color var(--ease),border-color var(--ease),transform var(--ease);
}
.dl-card:hover{background:rgba(255,255,255,.15);border-color:rgba(255,255,255,.42);transform:translateY(-1px)}
.dl-card__text strong{display:block;font-size:15px;color:#fff;font-weight:600}
.dl-card__text span{display:block;font-size:12px;color:rgba(255,255,255,.58);letter-spacing:.02em}
.dl-card__cta{
  flex:0 0 auto;display:inline-flex;align-items:center;justify-content:center;
  height:36px;padding:0 16px;border-radius:10px;background:var(--c-accent);color:#fff;
  font-size:13px;font-weight:600;transition:background-color var(--ease);
}
.dl-card:hover .dl-card__cta{background:var(--c-accent-hover)}

/* footer */
.site-footer{background:var(--c-primary-deep);color:#DCE7E3;padding:64px 0 0;margin-top:0}
.footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1fr;gap:40px;padding-bottom:48px}
.footer-brand .logo__text strong{color:#fff}
.footer-brand .logo__text small{color:rgba(255,255,255,.6)}
.footer-brand p{margin-top:16px;font-size:14px;line-height:1.8;color:rgba(255,255,255,.66);max-width:330px}
.footer-col h3{font-size:14px;color:#fff;margin-bottom:16px;letter-spacing:.04em}
.footer-col ul{display:grid;gap:10px}
.footer-col a{font-size:14px;color:rgba(255,255,255,.68);transition:color var(--ease)}
.footer-col a:hover{color:var(--c-accent)}
.footer-bottom{
  border-top:1px solid rgba(255,255,255,.12);padding:20px 0;
  display:flex;align-items:center;justify-content:space-between;gap:12px;flex-wrap:wrap;
  font-size:13px;color:rgba(255,255,255,.55);
}
.to-top{color:rgba(255,255,255,.78);transition:color var(--ease)}
.to-top:hover{color:var(--c-accent)}

@media (max-width:1199px){
  .post-grid{grid-template-columns:repeat(3,1fr);gap:20px}
  .scene-card{grid-template-columns:150px 1fr}
}
@media (max-width:991px){
  .nav-toggle{display:grid}
  .section{padding:72px 0}
  .page-band__grid{grid-template-columns:1fr;gap:24px;align-items:start}
  .post-grid{grid-template-columns:repeat(2,1fr);gap:16px}
  .scene-grid{grid-template-columns:1fr}
  .scene-card{grid-template-columns:160px 1fr}
  .notes-layout{grid-template-columns:1fr;gap:26px}
  .cta-band{grid-template-columns:1fr;padding:40px;gap:28px}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px}
  .filter-count{margin-left:0}
}
@media (max-width:767px){
  .section{padding:56px 0}
  .post-grid{grid-template-columns:1fr}
  .scene-card{grid-template-columns:1fr}
  .scene-card img{height:180px}
  .page-band{padding:36px 0 34px}
  .cta-band{padding:32px;border-radius:16px}
  .list-more .btn{width:100%}
  .dl-card{padding:12px 14px}
  .footer-bottom{justify-content:flex-start}
}
@media (max-width:520px){
  .container{padding:0 16px}
  .nav-tabs__inner{padding:10px 16px}
  .logo__text strong{font-size:15px}
  .logo__text small{font-size:11px}
  .nav-actions .nav-download{padding:0 14px;font-size:13px}
  .footer-grid{grid-template-columns:1fr}
  .faq-q{padding:16px 16px;font-size:14.5px}
  .faq-a p{padding:0 16px 18px}
  .dl-card__cta{height:34px;padding:0 12px;font-size:12px}
}