/* ============================================================
   RAINBOW OCEAN — Nordic-minimal footwear site
   Author: built for 凌洋國際有限公司
   No external assets. No web fonts.
   ============================================================ */

:root{
  --paper:#f2efe9;
  --paper-2:#e9e5dd;
  --white:#fbfaf7;
  --ink:#15161a;
  --ink-2:#4a4b4f;
  --ink-3:#7c7b77;
  --stone:#9d988e;
  --line:rgba(21,22,26,.13);
  --line-2:rgba(21,22,26,.07);
  --olive:#5b6551;
  --clay:#9a6a50;
  --sans:"Helvetica Neue",Helvetica,Arial,"PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
  --gut:clamp(20px,5vw,72px);
  --ease:cubic-bezier(.22,.61,.36,1);
}

*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  margin:0;
  background:var(--paper);
  color:var(--ink);
  font-family:var(--sans);
  font-size:16px;
  line-height:1.65;
  font-weight:400;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}
img{display:block;max-width:100%;height:auto}
a{color:inherit;text-decoration:none}
h1,h2,h3,h4,p,dl,dd,figure,blockquote{margin:0}
ul,ol{margin:0;padding:0;list-style:none}

/* language switch ------------------------------------------------ */
.en{display:none}
html[lang^="en"] .zh{display:none}
html[lang^="en"] .en{display:inline}
html[lang^="en"] body{font-family:var(--sans)}

/* ============================================================
   header
   ============================================================ */
.hdr{
  position:sticky;top:0;z-index:50;
  background:rgba(242,239,233,.86);
  backdrop-filter:saturate(140%) blur(10px);
  -webkit-backdrop-filter:saturate(140%) blur(10px);
  border-bottom:1px solid transparent;
  transition:border-color .3s var(--ease),background .3s var(--ease);
}
.hdr.is-stuck{border-bottom-color:var(--line);background:rgba(242,239,233,.95)}
.hdr-in{
  display:flex;align-items:center;gap:clamp(16px,3vw,48px);
  padding:0 var(--gut);
  height:clamp(58px,7vh,76px);
}
.brand{display:flex;align-items:baseline;gap:10px;flex-shrink:0}
.brand-en{
  font-size:14px;letter-spacing:.16em;font-weight:500;
}
.brand-cn{
  font-size:10px;letter-spacing:.22em;color:var(--ink-3);
  text-transform:uppercase;
}
.nav{
  display:flex;gap:clamp(14px,2.2vw,34px);
  margin-left:auto;
  font-size:11.5px;letter-spacing:.16em;text-transform:uppercase;
  color:var(--ink-2);
}
.nav a{position:relative;padding:4px 0;transition:color .25s var(--ease)}
.nav a::after{
  content:"";position:absolute;left:0;bottom:0;width:0;height:1px;
  background:var(--ink);transition:width .3s var(--ease);
}
.nav a:hover{color:var(--ink)}
.nav a:hover::after{width:100%}
.lang{
  display:flex;align-items:center;gap:5px;
  font-size:11px;letter-spacing:.1em;color:var(--stone);
  flex-shrink:0;
}
.lang button{
  background:none;border:0;padding:3px 2px;cursor:pointer;
  font:inherit;color:inherit;letter-spacing:.1em;
  transition:color .2s var(--ease);
}
.lang button.on,.lang button:hover{color:var(--ink)}
.lang-sep{opacity:.5}

/* ============================================================
   hero
   ============================================================ */
.hero{padding:clamp(40px,7vw,88px) var(--gut) 0}
.hero-copy{
  display:grid;
  grid-template-columns:minmax(0,1.05fr) minmax(0,.95fr);
  gap:clamp(24px,5vw,72px);
  align-items:end;
  padding-bottom:clamp(28px,4vw,48px);
}
.eyebrow{
  grid-column:1 / -1;
  font-size:11px;letter-spacing:.2em;text-transform:uppercase;
  color:var(--ink-3);
  padding-bottom:clamp(18px,3vw,34px);
  border-bottom:1px solid var(--line);
  margin-bottom:clamp(20px,3vw,38px);
}
.hero h1{
  font-size:clamp(2.5rem,6.4vw,5.4rem);
  line-height:.98;
  font-weight:300;
  letter-spacing:-.03em;
}
.lede{
  font-size:clamp(.95rem,1.15vw,1.06rem);
  line-height:1.75;
  color:var(--ink-2);
  max-width:46ch;
}
.hero-media{position:relative;overflow:hidden;background:var(--paper-2)}
.hero-media img{
  width:100%;
  aspect-ratio:16/7;
  object-fit:cover;
  animation:heroIn 1.4s var(--ease) both;
}
@keyframes heroIn{from{transform:scale(1.045);opacity:.4}to{transform:scale(1);opacity:1}}
.hero-media figcaption{
  position:absolute;right:0;bottom:0;
  background:var(--ink);color:var(--paper);
  font-size:10.5px;letter-spacing:.14em;text-transform:uppercase;
  padding:9px 14px;
}
.hero-meta{
  display:grid;grid-template-columns:repeat(3,1fr);
  gap:clamp(16px,3vw,48px);
  padding:clamp(20px,3vw,32px) 0 clamp(40px,6vw,76px);
  border-bottom:1px solid var(--line);
}
.hero-meta dt{
  font-size:10.5px;letter-spacing:.2em;text-transform:uppercase;
  color:var(--stone);margin-bottom:7px;
}
.hero-meta dd{font-size:13.5px;color:var(--ink-2);line-height:1.5}

/* ============================================================
   section shell
   ============================================================ */
.sec{padding:clamp(56px,9vw,120px) var(--gut)}
.sec-alt{background:var(--paper-2)}
.sec-head{
  display:grid;
  grid-template-columns:clamp(44px,6vw,88px) minmax(0,1fr) auto;
  align-items:baseline;
  gap:clamp(12px,2vw,28px);
  padding-bottom:clamp(28px,4vw,52px);
  border-bottom:1px solid var(--line);
  margin-bottom:clamp(30px,5vw,64px);
}
.num{
  font-size:11px;letter-spacing:.14em;color:var(--stone);
  font-variant-numeric:tabular-nums;
}
.sec-head h2{
  font-size:clamp(1.45rem,2.9vw,2.5rem);
  font-weight:400;
  letter-spacing:-.015em;
  line-height:1.1;
}
.sec-note{
  font-size:10.5px;letter-spacing:.18em;text-transform:uppercase;
  color:var(--ink-3);white-space:nowrap;
}
@media (max-width:720px){
  .sec-note{display:none}
  .sec-head{grid-template-columns:36px minmax(0,1fr)}
}

/* ============================================================
   about
   ============================================================ */
.about-grid{
  display:grid;
  grid-template-columns:minmax(0,1fr) minmax(0,.92fr);
  gap:clamp(32px,6vw,88px);
  align-items:start;
}
.about-text p{color:var(--ink-2);font-size:14.5px;line-height:1.8;max-width:60ch}
.about-text p + p{margin-top:1.15em}
.about-text .lead{
  font-size:clamp(1.1rem,1.9vw,1.5rem);
  line-height:1.45;
  color:var(--ink);
  letter-spacing:-.01em;
  margin-bottom:1.1em;
  max-width:34ch;
}
.facts{
  display:grid;grid-template-columns:repeat(2,minmax(0,1fr));
  gap:0;margin-top:clamp(28px,4vw,44px);
  border-top:1px solid var(--line);
}
.facts > div{
  padding:14px 0 13px;
  border-bottom:1px solid var(--line-2);
  display:flex;justify-content:space-between;align-items:baseline;gap:12px;
}
.facts > div:nth-child(odd){padding-right:18px}
.facts > div:nth-child(even){padding-left:18px;border-left:1px solid var(--line-2)}
.facts dt{font-size:11px;letter-spacing:.1em;text-transform:uppercase;color:var(--stone)}
.facts dd{font-size:13.5px;font-variant-numeric:tabular-nums;text-align:right}

.about-media{display:grid;gap:clamp(14px,2vw,22px)}
.about-media figure{position:relative}
.about-media img{width:100%;object-fit:cover}
.fig-a img{aspect-ratio:4/3}
.fig-b img{aspect-ratio:3/2}
.about-media figcaption{
  font-size:11px;color:var(--ink-3);letter-spacing:.06em;
  padding-top:9px;
}
.fig-b{margin-left:clamp(0px,4vw,48px)}

/* ============================================================
   lines
   ============================================================ */
.lines{
  display:grid;grid-template-columns:repeat(4,minmax(0,1fr));
  gap:clamp(12px,1.8vw,24px);
}
.line-card{
  position:relative;display:block;
  background:var(--white);
  border:1px solid var(--line-2);
  padding:0 0 clamp(14px,2vw,20px);
  transition:background .3s var(--ease),border-color .3s var(--ease);
}
.line-card img{
  width:100%;aspect-ratio:4/5;object-fit:cover;
  filter:saturate(.94);
  transition:transform .9s var(--ease),filter .4s var(--ease);
}
.line-card:hover img{transform:scale(1.03);filter:saturate(1)}
.line-num{
  position:absolute;top:10px;left:12px;z-index:2;
  font-size:10.5px;letter-spacing:.16em;
  color:var(--white);
  mix-blend-mode:difference;
}
.line-body{padding:clamp(14px,1.6vw,20px) clamp(12px,1.4vw,18px) 0}
.line-body h3{
  font-size:clamp(.95rem,1.2vw,1.08rem);
  font-weight:500;letter-spacing:-.005em;
  margin-bottom:6px;
}
.line-body p{font-size:11.5px;letter-spacing:.05em;color:var(--ink-3)}

/* ============================================================
   products
   ============================================================ */
.grid{
  display:grid;grid-template-columns:repeat(3,minmax(0,1fr));
  gap:0;
  border-top:1px solid var(--line);
}
.grid > *{min-width:0}
.item{
  padding:clamp(18px,2.4vw,30px);
  border-bottom:1px solid var(--line);
  border-right:1px solid var(--line);
}
.item:nth-child(3n){border-right:0}
@media (min-width:1081px){
  .item:last-child, .item:nth-last-child(2), .item:nth-last-child(3){border-bottom:0}
}
.item-media{overflow:hidden;background:var(--paper-2)}
.item-media img{
  width:100%;aspect-ratio:4/5;object-fit:cover;
  transition:transform 1s var(--ease);
}
.item:hover .item-media img{transform:scale(1.035)}
.item-body{padding-top:clamp(12px,1.6vw,18px)}
.code{
  font-size:10.5px;letter-spacing:.18em;
  color:var(--stone);
  font-variant-numeric:tabular-nums;
  margin-bottom:8px;
}
.item h3{
  font-size:clamp(.98rem,1.25vw,1.12rem);
  font-weight:500;line-height:1.35;
  margin-bottom:12px;
}
.spec{
  display:grid;gap:6px;
  border-top:1px solid var(--line-2);
  padding-top:11px;
}
.spec > div{display:flex;justify-content:space-between;gap:10px;align-items:baseline}
.spec dt{font-size:10.5px;letter-spacing:.12em;text-transform:uppercase;color:var(--stone)}
.spec dd{font-size:12.5px;color:var(--ink-2);text-align:right;font-variant-numeric:tabular-nums}
.note{
  margin-top:clamp(20px,3vw,32px);
  font-size:11.5px;color:var(--ink-3);line-height:1.7;max-width:78ch;
}

/* ============================================================
   craft
   ============================================================ */
.steps{
  display:grid;grid-template-columns:repeat(4,minmax(0,1fr));
  gap:clamp(16px,2.4vw,36px);
  margin-bottom:clamp(36px,5vw,64px);
}
.steps li{border-top:2px solid var(--ink);padding-top:14px}
.step-num{
  display:block;font-size:10.5px;letter-spacing:.18em;
  color:var(--stone);margin-bottom:clamp(16px,2.4vw,30px);
  font-variant-numeric:tabular-nums;
}
.steps h3{font-size:clamp(.98rem,1.2vw,1.1rem);font-weight:500;margin-bottom:9px}
.steps p{font-size:13px;line-height:1.75;color:var(--ink-2)}

.craft-media{
  display:grid;
  grid-template-columns:1.35fr 1fr 1fr;
  grid-auto-rows:minmax(0,1fr);
  gap:clamp(12px,1.8vw,22px);
}
.craft-media figure{display:flex;flex-direction:column}
.craft-media img{width:100%;height:100%;object-fit:cover;aspect-ratio:4/3}
.craft-media figcaption{
  font-size:11px;color:var(--ink-3);line-height:1.5;
  padding-top:9px;max-width:34ch;
}
.cm-1 img{aspect-ratio:16/9}

/* ============================================================
   coop
   ============================================================ */
.coop-grid{
  display:grid;grid-template-columns:repeat(3,minmax(0,1fr));
  gap:clamp(24px,4vw,64px);
}
.coop-num{
  display:inline-block;
  font-size:10.5px;letter-spacing:.2em;
  color:var(--white);background:var(--ink);
  width:22px;height:22px;line-height:22px;text-align:center;
  margin-bottom:16px;
}
.coop-item h3{font-size:clamp(1.05rem,1.5vw,1.3rem);font-weight:500;margin-bottom:12px}
.coop-item p{font-size:13.5px;line-height:1.8;color:var(--ink-2)}
.coop-item ul{margin-top:14px;border-top:1px solid var(--line-2)}
.coop-item li{
  font-size:12.5px;color:var(--ink-2);
  padding:9px 0 9px 16px;
  border-bottom:1px solid var(--line-2);
  position:relative;
}
.coop-item li::before{
  content:"";position:absolute;left:0;top:17px;
  width:6px;height:1px;background:var(--stone);
}
.coop-band{position:relative;margin-top:clamp(36px,5vw,64px);overflow:hidden}
.coop-band img{width:100%;aspect-ratio:21/8;object-fit:cover}
.coop-band figcaption{
  position:absolute;left:0;bottom:0;
  background:var(--paper);
  font-size:10.5px;letter-spacing:.14em;text-transform:uppercase;
  color:var(--ink-2);
  padding:9px 14px;
}

/* ============================================================
   contact
   ============================================================ */
.contact-grid{
  display:grid;grid-template-columns:minmax(0,.85fr) minmax(0,1.15fr);
  gap:clamp(32px,6vw,88px);
  align-items:start;
}
.contact-copy .lead{
  font-size:clamp(1.1rem,1.9vw,1.5rem);
  line-height:1.45;letter-spacing:-.01em;max-width:30ch;
  margin-bottom:1.1em;
}
.contact-copy .small{font-size:13px;line-height:1.8;color:var(--ink-3);max-width:44ch}
.contact-info dl{
  display:grid;grid-template-columns:repeat(2,minmax(0,1fr));
  gap:0;border-top:1px solid var(--line);
}
.contact-info dl > div{
  padding:16px 0;
  border-bottom:1px solid var(--line-2);
}
.contact-info dl > div.wide{grid-column:1 / -1}
.contact-info dt{
  font-size:10.5px;letter-spacing:.18em;text-transform:uppercase;
  color:var(--stone);margin-bottom:6px;
}
.contact-info dd{font-size:13.5px;line-height:1.7;color:var(--ink)}
.contact-info dl > div:not(.wide):nth-child(even){padding-left:clamp(0px,2vw,28px)}
.todo{color:var(--clay)}
.todo .zh,.todo .en{letter-spacing:.08em}
.contact-info .lnk{border-bottom:1px solid var(--line-2);transition:color .25s var(--ease),border-color .25s var(--ease)}
.contact-info .lnk:hover{color:var(--olive);border-color:var(--olive)}

/* ============================================================
   footer
   ============================================================ */
.ftr{
  background:var(--ink);color:var(--paper);
  padding:clamp(36px,5vw,64px) var(--gut) clamp(28px,4vw,44px);
}
.ftr-in{
  display:grid;grid-template-columns:1fr auto;gap:clamp(20px,4vw,48px);
  align-items:start;
}
.ftr-mark{font-size:13px;letter-spacing:.2em;margin-bottom:8px}
.ftr-sub{font-size:11.5px;color:rgba(242,239,233,.55);letter-spacing:.06em}
.ftr-links{display:flex;gap:clamp(14px,2vw,28px);font-size:11px;letter-spacing:.14em;text-transform:uppercase;color:rgba(242,239,233,.7)}
.ftr-links a:hover{color:var(--paper)}
.ftr-copy{
  grid-column:1 / -1;
  margin-top:clamp(24px,4vw,44px);
  padding-top:18px;
  border-top:1px solid rgba(242,239,233,.16);
  font-size:11px;color:rgba(242,239,233,.45);letter-spacing:.04em;
}

/* ============================================================
   reveal
   ============================================================ */
.reveal{opacity:0;transform:translateY(16px)}
.reveal.is-in{
  opacity:1;transform:none;
  transition:opacity .9s var(--ease),transform .9s var(--ease);
  transition-delay:var(--d,0ms);
}
@media (prefers-reduced-motion:reduce){
  .reveal{opacity:1;transform:none}
  .hero-media img{animation:none}
  *{transition:none!important}
}

/* ============================================================
   responsive
   ============================================================ */
@media (max-width:1080px){
  .grid{grid-template-columns:repeat(2,minmax(0,1fr))}
  .item:nth-child(3n){border-right:1px solid var(--line)}
  .item:nth-child(2n){border-right:0}
  .lines{grid-template-columns:repeat(2,minmax(0,1fr))}
  .steps{grid-template-columns:repeat(2,minmax(0,1fr));gap:28px}
  .craft-media{grid-template-columns:1fr 1fr;grid-auto-rows:auto}
  .cm-1{grid-column:1 / -1}
  .cm-1 img{aspect-ratio:16/7}
  .about-grid{grid-template-columns:1fr;gap:36px}
  .fig-b{margin-left:0}
  .about-media{grid-template-columns:1fr 1fr;align-items:end}
  .coop-grid{grid-template-columns:1fr;gap:0}
  .coop-item{padding:24px 0;border-bottom:1px solid var(--line)}
  .contact-grid{grid-template-columns:1fr;gap:32px}
}

@media (max-width:760px){
  body{font-size:15px}
  .nav{display:none}
  .brand-en{font-size:12.5px;letter-spacing:.13em}
  .hero-copy{grid-template-columns:1fr;gap:22px;align-items:start}
  .hero h1{font-size:clamp(2.1rem,9.5vw,3rem)}
  .hero-media img{aspect-ratio:4/3}
  .hero-media figcaption{position:static;background:none;color:var(--ink-3);padding:9px 0 0;font-size:10px;letter-spacing:.12em}
  .hero-meta{grid-template-columns:1fr;gap:14px;padding-bottom:36px}
  .hero-meta > div{display:flex;justify-content:space-between;align-items:baseline;gap:14px;border-bottom:1px solid var(--line-2);padding-bottom:12px}
  .hero-meta dt{margin:0}
  .hero-meta dd{text-align:right;font-size:12.5px}
  .sec{padding:48px var(--gut)}
  .grid{grid-template-columns:1fr}
  .item{border-right:0!important;padding:20px 0}
  .item-media img{aspect-ratio:3/2}
  .lines{grid-template-columns:1fr}
  .line-card img{aspect-ratio:3/2}
  .steps{grid-template-columns:1fr;gap:22px}
  .craft-media{grid-template-columns:1fr}
  .cm-1 img,.craft-media img{aspect-ratio:3/2}
  .facts{grid-template-columns:1fr}
  .facts > div:nth-child(odd){padding-right:0}
  .facts > div:nth-child(even){padding-left:0;border-left:0}
  .about-media{grid-template-columns:1fr}
  .coop-band img{aspect-ratio:4/3}
  .contact-info dl{grid-template-columns:1fr}
  .contact-info dl > div:not(.wide):nth-child(even){padding-left:0}
  .ftr-in{grid-template-columns:1fr}
  .ftr-links{flex-wrap:wrap;gap:12px 20px}
  .coop-band figcaption{position:static;background:none;padding:9px 0 0;color:var(--ink-3)}
}