/* iThink — colour tokens, buttons, header and footer shared by every page.
   Every colour is sampled from the iThink logo: sun, flame, crimson (big leaf), plum to magenta (small leaf).
   Text uses the deeper end of each ramp so it stays readable. */
:root{
  --ink:#2A2526; --body:#575049; --mut:#8D847D; --line:#EDE6DD;
  --peach:#FFF4E8; --sunny:#FFF6D9; --paper:#FBF8F4;
  --sun:#FCC419; --flame:#F47A26; --crimson:#E4263B; --magenta:#D6197F; --plum:#5E2584; --deep:#32114D;
  --heat:linear-gradient(100deg,#E0531C 0%,#D21E5F 100%);
  --logo:linear-gradient(100deg,#FCC419 0%,#F47A26 28%,#E4263B 55%,#D6197F 78%,#5E2584 100%);
  --wa:#1FA855;
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{background:#fff;color:var(--body);font-size:16px;line-height:1.8;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;text-rendering:optimizeLegibility}
body.lang-zh{font-family:'Noto Sans SC','Plus Jakarta Sans',system-ui,-apple-system,'PingFang SC','Microsoft YaHei',sans-serif;letter-spacing:.01em}
body.lang-en{font-family:'Plus Jakarta Sans','Noto Sans SC',system-ui,-apple-system,'Segoe UI',sans-serif;letter-spacing:0}
img{display:block;max-width:100%;height:auto}
a{color:inherit;text-decoration:none}
button{font-family:inherit}
h1,h2,h3,h4{color:var(--ink)}
body.lang-zh h1,body.lang-zh h2,body.lang-zh h3,body.lang-zh h4{font-weight:900;letter-spacing:.01em}
body.lang-en h1,body.lang-en h2,body.lang-en h3,body.lang-en h4{font-family:'Plus Jakarta Sans','Noto Sans SC',sans-serif;font-weight:800;letter-spacing:-.02em}
.wrap{max-width:1180px;margin:0 auto;padding:0 24px}
.mono{font-family:'DM Mono','Noto Sans SC',ui-monospace,monospace;font-variant-numeric:tabular-nums}
.nb{white-space:nowrap}
:focus-visible{outline:2px solid var(--crimson);outline-offset:3px;border-radius:4px}
.ic{display:block;width:20px;height:20px;flex:none;fill:currentColor}
/* anchors land below the sticky header, not under it */
:target,section[id],div[id="try"]{scroll-margin-top:88px}

.btn{display:inline-flex;align-items:center;justify-content:center;gap:9px;font-family:inherit;font-weight:700;font-size:15.5px;line-height:1.3;padding:14px 24px;border-radius:999px;border:0;cursor:pointer;transition:transform .18s,background .2s,color .2s,box-shadow .2s}
.btn:hover{transform:translateY(-2px)}
.btn-wa{background:var(--wa);color:#fff;box-shadow:0 12px 24px -12px rgba(31,168,85,.75)}
.btn-wa:hover{background:#178A45;color:#fff}
.btn-ln{border:2px solid var(--ink);color:var(--ink);padding:12px 22px;background:transparent}
.btn-ln:hover{background:var(--ink);color:#fff}
.btn-hot{background:var(--heat);color:#fff;box-shadow:0 12px 24px -12px rgba(210,30,95,.7)}
.btn-light{background:#fff;color:var(--ink);box-shadow:0 14px 30px -14px rgba(0,0,0,.45)}
.motto{display:inline-block;font:800 15px/1.2 'Plus Jakarta Sans',sans-serif;background:var(--logo);-webkit-background-clip:text;background-clip:text;color:transparent}

/* ---------- top strip + header. The header bar (menu, language, WhatsApp) stays on screen while scrolling. ---------- */
.strip{background:var(--deep);color:#EFE2FB;font-size:13px;text-align:center;padding:8px 16px;line-height:1.5}
.strip b{color:var(--sun);font-weight:700}
.hd{position:sticky;top:0;z-index:80;background:#fff;border-bottom:1px solid var(--line)}
body.admin-bar .hd{top:32px}
.hd-in{position:relative;display:flex;align-items:center;gap:20px;height:70px}
.hd-logo{flex:none;display:flex;align-items:center;min-height:44px}
.hd-logo img{height:46px;width:auto}
.hd-nav{margin-left:auto;display:flex;align-items:center;gap:26px;font-size:14.5px;font-weight:500;color:var(--body)}
.hd-nav>a,.hd-nav .drop-btn{padding:8px 0;border:0;border-bottom:2px solid transparent;background:none;font:inherit;color:inherit;cursor:pointer;white-space:nowrap;transition:border-color .2s,color .2s}
.hd-nav>a:hover,.hd-nav>a.on,.hd-nav .drop-btn:hover,.hd-nav .nav-drop.on .drop-btn{color:var(--ink);border-bottom-color:var(--flame)}
.hd-nav .nav-home{display:none}
.hd-nav .drop-btn{display:inline-flex;align-items:center;gap:6px}
.hd-nav .drop-btn svg{transition:transform .25s}
.hd-nav .nav-drop{position:relative}
.hd-nav .nav-drop:hover .drop-btn svg,.hd-nav .nav-drop.open .drop-btn svg{transform:rotate(180deg)}
.hd-nav .drop-panel{position:absolute;top:calc(100% + 10px);left:-18px;min-width:330px;background:#fff;border:1px solid var(--line);border-radius:16px;box-shadow:0 26px 50px -26px rgba(40,20,10,.45);padding:8px;opacity:0;visibility:hidden;transform:translateY(6px);transition:opacity .2s,transform .2s,visibility .2s}
.hd-nav .drop-panel::before{content:"";position:absolute;left:0;right:0;top:-12px;height:12px}
.hd-nav .nav-drop:hover .drop-panel,.hd-nav .nav-drop.open .drop-panel,.hd-nav .nav-drop:focus-within .drop-panel{opacity:1;visibility:visible;transform:none}
.hd-nav .drop-item{display:block;padding:11px 14px;border-radius:11px;transition:background .2s}
.hd-nav .drop-item:hover{background:var(--paper)}
.hd-nav .di-name{display:flex;align-items:center;gap:8px;font-size:15px;font-weight:700;color:var(--ink);line-height:1.5}
.hd-nav .di-name em{font-style:normal;font-size:11px;font-weight:700;color:#fff;background:var(--heat);padding:1px 9px;border-radius:999px}
.hd-nav .di-sub{display:block;font-size:13px;color:var(--mut);line-height:1.5}
.lang{display:flex;flex:none;border:1px solid var(--line);border-radius:999px;padding:3px;background:#fff}
.lang>*{display:grid;place-items:center;font:500 12px 'DM Mono','Noto Sans SC',monospace;color:var(--mut);padding:5px 11px;border-radius:999px;line-height:1.4}
.lang .on{background:var(--ink);color:#fff}
.lang a:hover{color:var(--ink)}
.hd-wa{display:inline-flex;flex:none;align-items:center;gap:7px;background:var(--wa);color:#fff;font-weight:700;font-size:14px;padding:10px 17px;border-radius:999px;white-space:nowrap}
.hd-wa:hover{background:#178A45}
.burger{display:none;flex:none;width:44px;height:44px;border:0;background:none;cursor:pointer;flex-direction:column;justify-content:center;align-items:center;gap:6px;margin-right:-8px}
.burger span{display:block;width:24px;height:2.5px;border-radius:2px;background:var(--ink);transition:transform .3s,opacity .3s}
body.nav-open .burger span:nth-child(1){transform:translateY(8.5px) rotate(45deg)}
body.nav-open .burger span:nth-child(2){opacity:0}
body.nav-open .burger span:nth-child(3){transform:translateY(-8.5px) rotate(-45deg)}

/* ---------- closing band + footer ---------- */
.cband{background:linear-gradient(100deg,#5E2584 0%,#B01C74 26%,#E4263B 56%,#F47A26 84%,#FCC419 100%);color:#fff;padding:76px 0}
.cband-in{display:flex;align-items:center;justify-content:space-between;gap:30px;flex-wrap:wrap}
.cband h2{color:#fff;font-size:clamp(28px,3.8vw,44px);line-height:1.22}
.cband p{margin-top:10px;font-size:17px;color:rgba(255,255,255,.92);max-width:32em}
.cband .btn svg{color:var(--wa)}
.ftr{background:#fff;padding:54px 0 28px;color:var(--body)}
.ft{display:grid;grid-template-columns:1.5fr 1fr 1fr 1.45fr;gap:40px;align-items:start}
.ft-brand img{height:60px;width:auto}
.ft-brand .motto{font-size:17px;margin-top:14px}
.ft-brand p{font-size:14px;line-height:1.8;margin-top:10px;max-width:22em}
.ft-col h4{font:500 12px 'DM Mono','Noto Sans SC',monospace;letter-spacing:.1em;text-transform:uppercase;color:var(--mut);margin-bottom:10px}
.ft-col a{display:block;font-size:14.5px;line-height:1.5;padding:5px 0;color:var(--ink)}
.ft-col a:hover{color:var(--crimson)}
.ft-col p{font-size:14px;line-height:1.7;margin-bottom:6px}
.ft-col p a{display:inline;padding:0;font-weight:700}
.ft-bot{display:flex;justify-content:space-between;gap:10px 24px;flex-wrap:wrap;margin-top:34px;padding-top:18px;border-top:1px solid var(--line);font-size:12.5px;line-height:1.7;color:var(--mut)}
.ft-credit{flex-basis:100%;text-align:center}
.ft-credit a{color:var(--body);text-decoration:underline;text-underline-offset:3px}

/* ---------- back to top + the phone action bar ---------- */
.tt{position:fixed;right:18px;bottom:24px;width:46px;height:46px;border:0;border-radius:50%;background:var(--ink);color:#fff;font-size:18px;line-height:1;cursor:pointer;display:grid;place-items:center;z-index:70;opacity:0;visibility:hidden;transition:opacity .25s,visibility .25s}
.tt.on{opacity:.94;visibility:visible}
.mb{display:none;position:fixed;left:0;right:0;bottom:0;z-index:75;grid-template-columns:1fr 1fr}
.mb a{display:flex;align-items:center;justify-content:center;gap:7px;padding:15px 0;font-weight:700;font-size:15px;line-height:1.6;color:#fff}
.mb .w{background:var(--wa)}.mb .c{background:var(--ink)}

@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto}}

/* anything a finger may press is at least 44px tall, on tablets held sideways too */
@media (max-width:1024px),(pointer:coarse){
  .lang>*{min-width:46px;min-height:44px;font-size:13px}
  .hd-wa{min-height:44px}
  .hd-nav>a,.hd-nav .drop-btn{min-height:44px;display:inline-flex;align-items:center}
  .ft-col a{padding:11px 0}
  .ft-col p a{display:inline-block;padding:11px 0}
  .ft-credit a{display:inline-block;padding:12px 0}
}
@media (max-width:980px){
  /* phones and tablets: the menu folds into the three-line button and opens as a sheet under the header */
  .burger{display:flex}
  .hd .lang{margin-left:auto}
  .hd-nav{display:none;position:absolute;left:0;right:0;top:100%;margin:0;flex-direction:column;align-items:stretch;gap:0;background:#fff;border-top:1px solid var(--line);border-bottom:1px solid var(--line);box-shadow:0 30px 40px -28px rgba(40,20,10,.5);padding:6px 24px 18px;max-height:calc(100vh - 120px);overflow-y:auto;font-size:16px}
  body.nav-open .hd-nav{display:flex}
  .hd-nav .nav-home{display:block}
  .hd-nav>a{padding:13px 0;border-bottom:1px solid var(--line);color:var(--ink);font-weight:700}
  .hd-nav>a:hover,.hd-nav>a.on{border-bottom-color:var(--line);color:var(--crimson)}
  .hd-nav .nav-drop{border-bottom:1px solid var(--line);padding:10px 0 6px}
  .hd-nav .drop-btn{pointer-events:none;padding:0 0 4px;border:0;font:500 12px 'DM Mono','Noto Sans SC',monospace;letter-spacing:.1em;color:var(--mut)}
  .hd-nav .drop-btn svg{display:none}
  .hd-nav .drop-panel{position:static;min-width:0;opacity:1;visibility:visible;transform:none;border:0;box-shadow:none;padding:0}
  .hd-nav .drop-panel::before{display:none}
  .hd-nav>a{display:flex}
  .hd-nav .drop-item{padding:9px 0}
  .ft{grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:26px 24px}
  .ft-brand,.ft-contact{grid-column:1/-1}
}
@media (max-width:782px){body.admin-bar .hd{top:46px}}
@media (max-width:640px){
  .strip{font-size:12px}
  .hd-in{height:62px;gap:10px}
  .hd-logo img{height:40px}
  .hd-wa{display:none}
  .cband{padding:52px 0}
  .cband .btn{width:100%}
  .ftr{padding-top:42px}
  .ft-contact p{margin-bottom:0}
  .ft-bot{flex-direction:column;gap:4px;margin-top:22px}
  .ft-credit{text-align:left}
  .mb{display:grid}
  body{padding-bottom:54px}
  .tt{bottom:68px}
}