/* ═══════════════════════════════════════════════════════════════
   SHARED BASE CSS — for /knowledge/ pages only
   Mirrors header/footer/typography/buttons/container from v155 baseline.
   ═══════════════════════════════════════════════════════════════ */

*,*::before,*::after{box-sizing:border-box}

:root{
  --green:#1a5c2e;
  --green-dark:#154d26;
  --green-light:#7fcb96;
  --green-pale:#a3d4b0;
  --green-bg:#eaf3de;
  --green-surface:#f0f4f1;
  --text:#2c2c2a;
  --muted:#5f5e5a;
  --hint:#888780;
  --border:rgba(44,44,42,0.12);
  --border-s:rgba(44,44,42,0.25);
  --bg:#fff;
  --bg-s:#f8f9f7;
  --r-sm:6px;
  --r-md:10px;
  --r-lg:14px;
}

html{scroll-behavior:smooth}
body{font-family:'Segoe UI',-apple-system,BlinkMacSystemFont,sans-serif;color:var(--text);background:var(--bg);line-height:1.6;margin:0;padding:0}

.container{max-width:1160px;margin:0 auto;padding:0 28px}

.btn{display:inline-flex;align-items:center;justify-content:center;gap:6px;font-size:14px;font-weight:500;padding:10px 22px;border-radius:var(--r-md);border:none;cursor:pointer;text-decoration:none;transition:opacity .15s,transform .1s;font-family:inherit;line-height:1.2}
.btn:hover{transform:translateY(-1px)}
.btn-primary{background:var(--green);color:#fff}
.btn-primary:hover{opacity:.9}
.btn-white{background:#fff;color:var(--green)}
.btn-white:hover{opacity:.92}
.btn-outline{background:transparent;color:var(--green);border:1.5px solid var(--green)}
.btn-outline:hover{background:var(--green-bg)}

.topbar{background:var(--green);padding:6px 0}
.topbar-i{display:flex;justify-content:space-between;align-items:center;gap:16px;flex-wrap:wrap}
.topbar span,.topbar a{font-size:12px;color:var(--green-pale);text-decoration:none}
.topbar a:hover{color:#fff}
.topbar-links{display:flex;gap:16px}

.nav{position:sticky;top:0;z-index:100;background:var(--bg);border-bottom:.5px solid var(--border);box-shadow:0 1px 8px rgba(0,0,0,.04)}
.nav-i{display:flex;justify-content:space-between;align-items:center;gap:20px;padding:14px 0}
.nav-logo{display:flex;align-items:center;gap:10px;text-decoration:none;color:inherit}
.logo-icon{width:38px;height:38px;background:var(--green);border-radius:9px;display:flex;align-items:center;justify-content:center;flex-shrink:0}
.logo-name{font-size:15px;font-weight:600;color:var(--text);line-height:1.2}
.logo-tagline{font-size:11px;color:var(--hint);line-height:1.2}
.nav-links{display:flex;gap:2px}
.nav-links a{font-size:13px;color:var(--muted);text-decoration:none;padding:6px 12px;border-radius:var(--r-sm);transition:background .15s,color .15s;cursor:pointer}
.nav-links a:hover{background:var(--bg-s);color:var(--text)}
.nav-links a.active{color:var(--green);font-weight:500;background:var(--green-bg)}
.nav-r{display:flex;align-items:center;gap:14px}
.nav-phone{font-size:14px;font-weight:600;color:var(--green);text-decoration:none;display:flex;align-items:center;gap:6px}
.nav-phone:hover{opacity:.85}
.nav-hamburger{display:none;background:none;border:none;cursor:pointer;width:36px;height:36px;flex-direction:column;gap:4px;justify-content:center;align-items:center;padding:0}
.nav-hamburger span{width:20px;height:2px;background:var(--text);transition:all .25s}

.mobile-menu{position:fixed;top:0;left:0;right:0;bottom:0;background:#fff;z-index:200;transform:translateY(-100%);transition:transform .3s ease-out;overflow-y:auto;display:flex;flex-direction:column}
.mobile-menu.open{transform:translateY(0)}
.mob-header{display:flex;justify-content:space-between;align-items:center;padding:14px 20px;border-bottom:1px solid var(--border)}
.mob-header-logo{display:flex;align-items:center;gap:10px}
.mob-header-name{font-size:15px;font-weight:600;color:var(--text);line-height:1.2}
.mob-header-tag{font-size:11px;color:var(--hint);line-height:1.2}
.mob-header-right{display:flex;align-items:center;gap:12px}
.mob-header-phone{font-size:14px;font-weight:600;color:var(--green);text-decoration:none}
.mob-close{background:none;border:none;font-size:22px;cursor:pointer;color:var(--text);padding:4px 8px;line-height:1}
.mob-links{padding:8px 0;flex:1}
.mob-links a{display:block;padding:14px 24px;font-size:15px;color:var(--text);text-decoration:none;border-bottom:1px solid var(--border);transition:background .15s}
.mob-links a:hover,.mob-links a.active{background:var(--green-bg);color:var(--green);font-weight:500}

.footer{background:#0e2a16;color:#fff;padding:32px 0 0;margin-top:64px}
.ft-main{display:flex;justify-content:space-between;align-items:center;gap:24px;padding-bottom:24px;border-bottom:1px solid rgba(255,255,255,.08);flex-wrap:wrap}
.ft-brand{display:flex;align-items:center;gap:10px}
.ft-name{font-size:14.5px;font-weight:600;color:#fff;line-height:1.2}
.ft-tag{font-size:11.5px;color:var(--green-pale);line-height:1.2}
.ft-info{display:flex;flex-wrap:wrap;gap:16px 28px;font-size:12.5px;color:var(--green-pale);flex:1;justify-content:center}
.ft-info span{display:inline-flex;align-items:center;gap:6px}
.ft-bot{display:flex;justify-content:space-between;align-items:center;padding:14px 28px;font-size:11.5px;color:var(--green-pale);opacity:.7;max-width:1160px;margin:0 auto}
.ft-copy,.ft-dom{font-size:11.5px}

.th140-zalo-fab{display:none;position:fixed;bottom:18px;right:18px;width:48px;height:48px;background:#0068ff;border-radius:50%;align-items:center;justify-content:center;color:#fff;text-decoration:none;box-shadow:0 4px 14px rgba(0,104,255,.35);z-index:90;transition:transform .15s}
.th140-zalo-fab:hover{transform:scale(1.05)}

@media(max-width:980px){
  .nav-i{padding:12px 0}
  .nav-links,.nav-r .nav-phone,.nav-r .th140-nav-cta,.th140-nav-cta{display:none}
  .nav-hamburger{display:flex}
  .topbar{display:none}
  .ft-main{flex-direction:column;align-items:flex-start;text-align:left}
  .ft-info{justify-content:flex-start;font-size:12px}
  .ft-bot{flex-direction:column;gap:6px;text-align:center}
  .th140-zalo-fab{display:inline-flex}
}
@media(max-width:700px){
  .container{padding:0 20px}
  .logo-name{font-size:14px}
  .logo-tagline{display:none}
  .ft-bot{padding:14px 20px}
}