/* =========================================================
   SIAM COMPASS — base.css
   三个首页版式共用的：字体、重置、容器、按钮、导航、页脚、表单
   ========================================================= */

/* ---------- Fonts (self-hosted, latin subset) ---------- */
@font-face{font-family:'Cormorant';src:url('../fonts/cormorant.woff2') format('woff2');font-weight:300 700;font-style:normal;font-display:swap}
@font-face{font-family:'Cormorant';src:url('../fonts/cormorant-italic.woff2') format('woff2');font-weight:300 700;font-style:italic;font-display:swap}
@font-face{font-family:'Inter';src:url('../fonts/inter.woff2') format('woff2');font-weight:300 700;font-style:normal;font-display:swap}
@font-face{font-family:'Jost';src:url('../fonts/jost.woff2') format('woff2');font-weight:300 700;font-style:normal;font-display:swap}
@font-face{font-family:'Playfair';src:url('../fonts/playfair.woff2') format('woff2');font-weight:400 700;font-style:normal;font-display:swap}
@font-face{font-family:'Playfair';src:url('../fonts/playfair-italic.woff2') format('woff2');font-weight:400 700;font-style:italic;font-display:swap}

/* ---------- Reset ---------- */
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body,h1,h2,h3,h4,h5,p,figure,blockquote,dl,dd{margin:0}
ul,ol{margin:0;padding:0;list-style:none}
img,svg,video{display:block;max-width:100%}
button,input,select,textarea{font:inherit;color:inherit}
button{background:none;border:0;cursor:pointer}
a{color:inherit;text-decoration:none}
:focus-visible{outline:2px solid currentColor;outline-offset:3px}
::selection{background:#c9a24a;color:#111}

/* ---------- Container ---------- */
.container{width:100%;max-width:1360px;margin-inline:auto;padding-inline:clamp(20px,4vw,56px)}
.container--narrow{max-width:1040px}
.container--wide{max-width:1560px}

/* ---------- Generic type helpers ---------- */
.eyebrow{
  font-family:'Inter',sans-serif;font-size:11px;font-weight:500;
  letter-spacing:.2em;text-transform:uppercase;line-height:1;
  display:inline-flex;align-items:center;gap:10px;
}
.eyebrow::before{content:"";width:26px;height:1px;background:currentColor;opacity:.55}
.eyebrow--plain::before{display:none}
.lede{font-size:clamp(1rem,1.05vw + .7rem,1.2rem);line-height:1.75;font-weight:300}
.muted{opacity:.68}
.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap;border:0}
.skip-link{position:absolute;left:-999px;top:0;z-index:999;background:#fff;color:#111;padding:12px 18px}
.skip-link:focus{left:12px;top:12px}

/* ---------- Buttons ---------- */
.btn{
  --btn-bg:#111;--btn-fg:#fff;--btn-bd:#111;
  display:inline-flex;align-items:center;justify-content:center;gap:.7em;
  padding:1.02em 1.9em;border:1px solid var(--btn-bd);
  background:var(--btn-bg);color:var(--btn-fg);
  font-family:'Inter',sans-serif;font-size:12.5px;font-weight:500;
  letter-spacing:.14em;text-transform:uppercase;line-height:1;
  transition:background .35s,color .35s,border-color .35s,transform .35s;
  white-space:nowrap;
}
.btn:hover{transform:translateY(-1px)}
.btn--ghost{--btn-bg:transparent;--btn-fg:currentColor;--btn-bd:currentColor}
.btn--light{--btn-bg:#fff;--btn-fg:#111;--btn-bd:#fff}
.btn--block{width:100%}
.btn svg{width:14px;height:14px;flex:none;transition:transform .35s}
.btn:hover svg{transform:translateX(4px)}
.btn--lg{padding:1.15em 2.1em;font-size:13px}

/* 文字箭头链接 */
.link-arrow{
  display:inline-flex;align-items:center;gap:.65em;
  font-family:'Inter',sans-serif;font-size:12px;font-weight:500;
  letter-spacing:.14em;text-transform:uppercase;
  padding-bottom:6px;border-bottom:1px solid currentColor;
}
.link-arrow svg{width:15px;height:15px;transition:transform .35s}
.link-arrow:hover svg{transform:translateX(5px)}

/* ---------- Header / Nav ---------- */
.site-header{
  position:fixed;inset:0 0 auto;z-index:100;
  transition:background .45s ease,box-shadow .45s ease,backdrop-filter .45s;
}
.site-header__inner{
  display:flex;align-items:center;gap:clamp(16px,2.6vw,44px);
  height:var(--header-h,86px);
  transition:height .45s ease;
}
.brand{display:flex;align-items:center;gap:12px;flex:none}
.brand__mark{width:30px;height:30px;flex:none}
.brand__name{
  font-family:'Cormorant',serif;font-size:23px;font-weight:500;
  letter-spacing:.16em;text-transform:uppercase;line-height:1;white-space:nowrap;
}
.brand__sub{
  display:block;font-family:'Inter',sans-serif;font-size:8.5px;font-weight:400;
  letter-spacing:.32em;text-transform:uppercase;opacity:.55;margin-top:4px;
}

.nav{display:flex;align-items:center;gap:clamp(14px,1.8vw,30px);margin-inline:auto}
.nav__item{position:relative}
.nav__link{
  display:inline-flex;align-items:center;gap:6px;
  font-family:'Inter',sans-serif;font-size:12.5px;font-weight:400;
  letter-spacing:.11em;text-transform:uppercase;padding:10px 0;
  position:relative;
}
.nav__link::after{
  content:"";position:absolute;left:0;bottom:2px;width:100%;height:1px;
  background:currentColor;transform:scaleX(0);transform-origin:left;
  transition:transform .4s cubic-bezier(.2,.7,.3,1);
}
.nav__item:hover .nav__link::after,.nav__link[aria-expanded="true"]::after{transform:scaleX(1)}
.nav__link .chev{width:9px;height:9px;opacity:.6}

/* Mega menu */
.mega{
  position:absolute;top:100%;left:50%;translate:-50% 0;
  width:min(1120px,calc(100vw - 48px));
  background:#fff;color:#16211d;
  padding:clamp(28px,3vw,44px);
  display:grid;grid-template-columns:repeat(4,1fr);gap:clamp(20px,3vw,46px);
  box-shadow:0 40px 80px -30px rgba(0,0,0,.35),0 0 0 1px rgba(0,0,0,.06);
  opacity:0;visibility:hidden;translate:-50% 10px;
  transition:opacity .32s,translate .32s,visibility .32s;
  z-index:50;
}
.nav__item:hover > .mega,.nav__item:focus-within > .mega,.mega.is-open{opacity:1;visibility:visible;translate:-50% 0}
.mega__col h4{
  font-family:'Inter',sans-serif;font-size:10.5px;font-weight:600;
  letter-spacing:.2em;text-transform:uppercase;opacity:.45;
  padding-bottom:14px;margin-bottom:10px;border-bottom:1px solid rgba(0,0,0,.1);
}
.mega__col li + li{margin-top:2px}
.mega__col a{
  display:block;padding:6px 0;font-size:13.5px;font-weight:400;
  opacity:.82;transition:opacity .25s,transform .25s;
}
.mega__col a:hover{opacity:1;transform:translateX(3px)}
.mega__feature{position:relative;overflow:hidden;min-height:220px;display:flex;align-items:flex-end;padding:18px}
.mega__feature img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;transition:transform 1.2s}
.mega__feature:hover img{transform:scale(1.05)}
.mega__feature span{position:relative;color:#fff;font-size:13px;line-height:1.5;letter-spacing:.02em;text-shadow:0 2px 14px rgba(0,0,0,.85),0 0 30px rgba(0,0,0,.6)}
.mega__feature::after{content:"";position:absolute;inset:0;background:linear-gradient(to top,rgba(0,0,0,.85),rgba(0,0,0,.25) 55%,transparent)}

.nav-actions{display:flex;align-items:center;gap:14px;flex:none}
.lang{display:flex;align-items:center;gap:6px;font-size:11px;letter-spacing:.14em;text-transform:uppercase;opacity:.8}
.lang select{border:0;background:none;font-size:11px;letter-spacing:.14em;text-transform:uppercase;padding:4px 0;cursor:pointer;appearance:none}
.lang svg{width:9px;height:9px;pointer-events:none}
.header-phone{display:flex;align-items:center;gap:8px;font-size:12px;letter-spacing:.06em;opacity:.85}
.header-phone svg{width:14px;height:14px}

.burger{display:none;width:44px;height:44px;align-items:center;justify-content:center}
.burger span{display:block;width:22px;height:1px;background:currentColor;position:relative;transition:.3s}
.burger span::before,.burger span::after{content:"";position:absolute;left:0;width:22px;height:1px;background:currentColor;transition:.3s}
.burger span::before{top:-6px}.burger span::after{top:6px}

/* Mobile nav drawer */
.mobile-nav{
  position:fixed;inset:0;z-index:99;background:#fff;color:#111;
  padding:100px 24px 40px;overflow:auto;
  transform:translateY(-100%);transition:transform .5s cubic-bezier(.6,.05,.3,1);
}
.mobile-nav.is-open{transform:none}
.mobile-nav__group + .mobile-nav__group{margin-top:26px;border-top:1px solid rgba(0,0,0,.08);padding-top:22px}
.mobile-nav__group > a{font-family:'Cormorant',serif;font-size:28px;display:block;padding:6px 0}
.mobile-nav__sub{display:flex;flex-wrap:wrap;gap:8px 16px;margin-top:12px}
.mobile-nav__sub a{font-size:12.5px;letter-spacing:.06em;opacity:.65}
.mobile-nav__cta{margin-top:32px;display:flex;flex-direction:column;gap:12px}
body.nav-open{overflow:hidden}

/* ---------- Footer ---------- */
.site-footer{position:relative;z-index:2}
.footer-top{
  display:grid;grid-template-columns:1.35fr repeat(3,.8fr) 1.15fr;
  gap:clamp(24px,3vw,54px);
  padding-block:clamp(52px,6vw,88px) clamp(36px,4vw,56px);
}
.footer-brand .brand{margin-bottom:20px}
.footer-brand p{font-size:13.5px;line-height:1.8;font-weight:300;opacity:.72;max-width:32ch}
.footer-col h5,.footer-newsletter h5{
  font-family:'Inter',sans-serif;font-size:10.5px;font-weight:600;
  letter-spacing:.2em;text-transform:uppercase;opacity:.45;margin-bottom:18px;
}
.footer-col a,.footer-col li{font-size:13.5px;line-height:2.05;opacity:.8;font-weight:300}
.footer-col a:hover{opacity:1;text-decoration:underline;text-underline-offset:3px}
.footer-newsletter p{font-size:13.5px;line-height:1.7;opacity:.72;margin-bottom:16px}
.footer-newsletter form{display:flex;border-bottom:1px solid currentColor;padding-bottom:8px;gap:10px}
.footer-newsletter input{flex:1;background:none;border:0;font-size:13px;min-width:0;outline:none}
.footer-newsletter input::placeholder{color:currentColor;opacity:.45}
.footer-newsletter button{opacity:.8}
.footer-newsletter button:hover{opacity:1}
.footer-bottom{
  border-top:1px solid currentColor;
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:16px;
  padding-block:24px;font-size:11.5px;letter-spacing:.04em;opacity:.55;
}
.footer-legal{display:flex;flex-wrap:wrap;gap:18px}
.footer-social{display:flex;gap:14px}
.footer-social a{width:32px;height:32px;border:1px solid currentColor;border-radius:50%;display:grid;place-items:center;opacity:.7}
.footer-social a:hover{opacity:1}
.footer-social svg{width:14px;height:14px}
.footer-cred{display:flex;flex-wrap:wrap;gap:22px;align-items:center;font-size:11px;letter-spacing:.06em;opacity:.6}
.footer-cred strong{font-weight:500;letter-spacing:.1em}

/* ---------- Forms ---------- */
.field{display:flex;flex-direction:column;gap:8px}
.field label{font-family:'Inter',sans-serif;font-size:10.5px;letter-spacing:.16em;text-transform:uppercase;opacity:.55}
.field input,.field select,.field textarea{
  width:100%;background:transparent;border:0;border-bottom:1px solid rgba(0,0,0,.22);
  padding:10px 0;font-size:14.5px;font-weight:300;border-radius:0;
  transition:border-color .3s;appearance:none;
}
.field textarea{resize:vertical;min-height:68px;line-height:1.6}
.field input:focus,.field select:focus,.field textarea:focus{outline:none;border-bottom-color:currentColor}
.field--boxed input,.field--boxed select,.field--boxed textarea{
  border:1px solid rgba(0,0,0,.16);padding:13px 14px;background:#fff;
}
.form-note{font-size:11px;line-height:1.6;opacity:.5;letter-spacing:.02em}

/* ---------- Reveal ---------- */
.reveal{opacity:0;transform:translateY(26px);transition:opacity .9s cubic-bezier(.2,.7,.3,1),transform .9s cubic-bezier(.2,.7,.3,1);transition-delay:var(--d,0ms)}
.reveal.is-in{opacity:1;transform:none}
@media (prefers-reduced-motion:reduce){
  .reveal{opacity:1;transform:none;transition:none}
  html{scroll-behavior:auto}
  *{animation-duration:.001ms !important;transition-duration:.001ms !important}
}

/* ---------- Responsive header ---------- */
@media (max-width:1180px){
  .nav{display:none}
  .burger{display:flex}
  .header-phone{display:none}
}
@media (max-width:900px){
  .lang{display:none}
  .site-header__inner{gap:12px}
  .nav-actions{gap:10px}
  .site-header .btn{padding:.9em 1.15em;font-size:10.5px;letter-spacing:.1em}
}
@media (max-width:440px){
  .nav-actions > .btn{display:none}
}
@media (max-width:860px){
  .site-header__inner{height:68px}
  .brand__name{font-size:19px}
  .brand__sub{display:none}
  .brand__mark{width:25px;height:25px}
  .footer-top{grid-template-columns:1fr 1fr;gap:32px}
  .footer-brand{grid-column:1/-1}
  .footer-newsletter{grid-column:1/-1}
  .footer-bottom{flex-direction:column;align-items:flex-start}
}