/* ============================================================
   Qunli Shoes — temporary introduction site
   Palette: paper / ink / forest / clay / sand
   ============================================================ */
:root{
  --paper:#f3f0e8;
  --paper-deep:#ebe5d8;
  --ink:#17231c;
  --forest:#173e30;
  --clay:#c4663e;
  --sand:#e4d6bf;
  --muted:#5f675b;
  --line:rgba(23,35,28,.16);
  --serif:"Songti SC","STSong","Noto Serif CJK SC","Source Han Serif SC",Georgia,"Times New Roman",serif;
  --sans:-apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei","Segoe UI",sans-serif;
}

*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
section[id]{scroll-margin-top:84px}
body{
  background:var(--paper);
  color:var(--ink);
  font-family:var(--sans);
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
a{color:inherit}
img,svg{display:block;max-width:100%}

/* paper grain */
.grain{
  position:fixed; inset:0; z-index:200; pointer-events:none; opacity:.28;
  background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='140' height='140'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.9' numOctaves='2'/%3E%3C/filter%3E%3Crect width='140' height='140' filter='url(%23n)' opacity='.2'/%3E%3C/svg%3E");
  mix-blend-mode:multiply;
}

/* ---------- header ---------- */
.site-header{
  position:sticky; top:0; z-index:100;
  display:flex; align-items:center; gap:24px;
  padding:16px clamp(22px,4vw,56px);
  background:rgba(243,240,232,.9);
  -webkit-backdrop-filter:blur(12px);
  backdrop-filter:blur(12px);
  border-bottom:1px solid var(--line);
}
.brand{display:flex; align-items:baseline; gap:11px; text-decoration:none; color:var(--ink)}
.brand-main{font-family:var(--serif); font-size:21px; font-weight:700; letter-spacing:.13em}
.brand-sub{font-size:10px; letter-spacing:.26em; color:var(--muted)}
.site-nav{display:flex; gap:28px; margin-left:auto}
.site-nav a{
  position:relative; padding-bottom:4px;
  font-size:10.5px; letter-spacing:.18em; text-transform:uppercase;
  text-decoration:none; color:var(--muted); transition:color .2s;
}
.site-nav a::after{
  content:""; position:absolute; left:0; bottom:0;
  width:0; height:1px; background:var(--ink); transition:width .25s;
}
.site-nav a:hover, .site-nav a.active{color:var(--ink)}
.site-nav a:hover::after, .site-nav a.active::after{width:100%}
.site-header.scrolled{box-shadow:0 8px 30px rgba(23,35,28,.06)}
.lang-toggle{display:flex; align-items:center; gap:2px}
.lang-toggle button{
  appearance:none; border:0; background:none; cursor:pointer;
  font-family:var(--sans); font-size:11px; letter-spacing:.14em;
  color:var(--muted); padding:6px 8px; transition:color .2s;
}
.lang-toggle button:hover{color:var(--ink)}
.lang-toggle button.active{color:var(--ink); box-shadow:inset 0 -1px 0 var(--ink)}
.lang-toggle .sep{color:var(--line); font-size:11px}

/* ---------- cover ---------- */
.hero{
  max-width:1400px; margin:0 auto;
  display:grid; grid-template-columns:1.06fr .94fr;
  align-items:center; gap:clamp(30px,5vw,70px);
  min-height:calc(100svh - 72px);
  padding:clamp(36px,4.5vw,64px) clamp(22px,4vw,56px) 96px;
  position:relative;
}
.eyebrow{
  font-size:10.5px; letter-spacing:.28em; text-transform:uppercase;
  color:var(--muted); margin-bottom:24px;
}
.hero h1{
  font-family:var(--serif); font-weight:500;
  font-size:clamp(48px,7vw,108px);
  line-height:1.02; letter-spacing:-.035em;
  margin-bottom:28px;
}
html[data-lang="zh"] .hero h1{
  font-size:clamp(46px,6.6vw,100px);
  line-height:1.12; letter-spacing:0;
}
.hero-lede{
  max-width:520px; font-size:16px; line-height:1.85;
  color:#3d473e; margin-bottom:30px;
}
.hero-mail{
  display:inline-block; font-size:14px; letter-spacing:.04em;
  color:var(--forest); text-decoration:none;
  border-bottom:1px solid var(--forest); padding-bottom:4px;
  transition:color .2s, border-color .2s;
}
.hero-mail:hover{color:var(--clay); border-color:var(--clay)}
.hero-art{justify-self:center; width:min(42vw,560px)}
.hero-art svg{width:100%; height:auto; overflow:visible}
.scroll-cue{
  position:absolute; left:50%; bottom:26px; transform:translateX(-50%);
  display:flex; flex-direction:column; align-items:center; gap:8px;
  color:var(--muted); text-decoration:none; transition:color .2s;
}
.scroll-cue:hover{color:var(--clay)}
.cue-line{width:1px; height:30px; background:currentColor; opacity:.4}
.scroll-cue svg{display:block; animation:cueDrop 2.4s ease-in-out infinite}
@keyframes cueDrop{
  0%,100%{transform:translateY(0); opacity:.65}
  50%{transform:translateY(6px); opacity:1}
}
.ring-text{
  font-family:var(--sans); font-size:9px; letter-spacing:.32em;
  fill:rgba(23,35,28,.55); text-transform:uppercase;
  transform-origin:300px 300px;
  animation:spin 52s linear infinite;
}
@keyframes spin{to{transform:rotate(360deg)}}

/* ---------- marquee ---------- */
.marquee{padding:16px 0; overflow:hidden}
.marquee-track{
  display:flex; gap:28px; width:max-content; white-space:nowrap;
  font-size:10px; letter-spacing:.28em; text-transform:uppercase; color:var(--muted);
  animation:marquee 36s linear infinite;
}
@keyframes marquee{to{transform:translateX(-50%)}}

/* ---------- shared sections ---------- */
.section{max-width:1400px; margin:0 auto; padding:clamp(56px,7.5vw,104px) clamp(22px,4vw,56px)}
.section-heading{
  font-family:var(--serif); font-weight:500;
  font-size:clamp(30px,3.6vw,48px);
  line-height:1.1; letter-spacing:-.02em;
  color:var(--ink); max-width:900px; margin-bottom:38px;
}
html[data-lang="zh"] .section-heading{line-height:1.28; letter-spacing:0}

/* ---------- story ---------- */
.story-grid{
  display:grid; grid-template-columns:1fr 1fr;
  gap:clamp(40px,6vw,90px); align-items:start;
}
.story blockquote{
  font-family:var(--serif); font-weight:500;
  font-size:clamp(26px,2.9vw,42px); line-height:1.2;
  letter-spacing:-.015em; color:var(--forest);
  position:sticky; top:120px;
}
html[data-lang="zh"] .story blockquote{line-height:1.5; letter-spacing:0}
.story-text p{
  font-size:16px; line-height:1.95; color:#3d473e;
  max-width:560px; margin-bottom:20px;
}
.story-text p:last-child{margin-bottom:0}

.timeline{
  display:grid; grid-template-columns:repeat(4,1fr);
  gap:clamp(28px,4vw,48px);
  margin-top:clamp(60px,8vw,100px);
}
.milestone{padding:0}
.year{
  font-family:var(--serif); font-size:clamp(34px,3.4vw,48px);
  line-height:1; color:var(--clay); margin-bottom:14px;
}
.milestone h3{
  font-size:11px; letter-spacing:.16em; text-transform:uppercase;
  font-weight:600; margin-bottom:8px;
}
.milestone p{font-size:13.5px; line-height:1.75; color:var(--muted); max-width:230px}

/* ---------- numbers ---------- */
.numbers{
  background:var(--paper); color:var(--ink);
}
.numbers-inner{max-width:1400px; margin:0 auto; padding:clamp(48px,7vw,88px) clamp(22px,4vw,56px)}
.number-grid{
  display:grid; grid-template-columns:repeat(4,1fr);
  gap:clamp(24px,3.5vw,44px);
}
.number-item{padding:0}
.number{
  font-family:var(--serif); font-size:clamp(40px,5vw,70px);
  line-height:1; letter-spacing:-.02em; margin-bottom:12px; color:var(--forest);
}
.number .unit{font-size:.36em; vertical-align:super; letter-spacing:0; margin-left:2px; opacity:.7}
.number-item p{font-size:10px; letter-spacing:.18em; text-transform:uppercase; color:var(--muted)}

/* ---------- products ---------- */
.section-head{
  display:grid; grid-template-columns:1.1fr .9fr;
  gap:40px; align-items:end; margin-bottom:48px;
}
.section-head h2{
  font-family:var(--serif); font-weight:500;
  font-size:clamp(34px,4.2vw,56px); line-height:1.08; letter-spacing:-.025em;
}
html[data-lang="zh"] .section-head h2{line-height:1.22; letter-spacing:0}
.section-lede{font-size:15px; line-height:1.85; color:#3d473e; max-width:480px}
.product-grid{display:grid; grid-template-columns:repeat(4,1fr); gap:18px}
.product-card{
  background:var(--paper-deep); border:1px solid var(--line); border-radius:2px;
  overflow:hidden; transition:transform .35s, box-shadow .35s;
}
.product-card:hover{transform:translateY(-6px); box-shadow:0 18px 40px rgba(23,35,28,.12)}
.product-art{background:#f0e5d1; aspect-ratio:16/9; overflow:hidden}
.product-art img{width:100%; height:100%; object-fit:cover; display:block}
.product-info{padding:24px 24px 28px}
.product-info h3{font-family:var(--serif); font-size:25px; font-weight:600; margin-bottom:8px}
.product-info p{font-size:14px; line-height:1.75; color:var(--muted)}

/* ---------- craft ---------- */
.principles{display:grid; grid-template-columns:repeat(3,1fr); gap:clamp(24px,4vw,54px)}
.principle{padding:0}
.principle h3{font-family:var(--serif); font-size:clamp(22px,2.2vw,30px); font-weight:600; margin-bottom:12px}
.principle p{font-size:14.5px; line-height:1.85; color:var(--muted)}

/* ---------- certifications ---------- */
.certifications{
  max-width:1400px; margin:0 auto;
  padding:0 clamp(22px,4vw,56px) clamp(64px,9vw,110px);
}
.certifications .section-heading{font-size:clamp(30px,3.6vw,48px); margin-bottom:28px}
.cert-grid{display:grid; grid-template-columns:repeat(3,1fr); gap:clamp(24px,4vw,48px)}
.cert-card{padding:0}
.cert-card h3{
  font-family:var(--serif); font-size:clamp(23px,2.3vw,30px);
  font-weight:600; line-height:1.15; margin-bottom:8px;
}
.cert-tag{
  font-size:10px; letter-spacing:.18em; text-transform:uppercase;
  color:var(--clay); margin-bottom:14px;
}
.cert-desc{font-size:14.5px; line-height:1.85; color:var(--muted)}
.cert-note{
  margin-top:34px;
  font-size:10px; letter-spacing:.14em; text-transform:uppercase; color:var(--muted);
}

/* ---------- contact ---------- */
.contact{background:var(--paper); color:var(--ink)}
.contact-inner{
  max-width:1400px; margin:0 auto;
  padding:clamp(56px,8vw,104px) clamp(22px,4vw,56px) clamp(64px,9vw,112px);
}
.contact h2{
  font-family:var(--serif); font-weight:500;
  font-size:clamp(34px,4.6vw,68px); line-height:1.08;
  letter-spacing:-.025em; max-width:900px; margin-bottom:22px;
}
html[data-lang="zh"] .contact h2{line-height:1.28; letter-spacing:0}
.contact-lede{
  font-size:15px; line-height:1.85; max-width:560px;
  color:#3d473e; margin-bottom:30px;
}
.contact-mail{
  display:inline-block; font-family:var(--serif);
  font-size:clamp(22px,2.6vw,34px); color:var(--forest);
  text-decoration:none; border-bottom:1px solid var(--forest);
  padding-bottom:5px; margin-bottom:30px;
  transition:color .2s, border-color .2s;
}
.contact-mail:hover{color:var(--clay); border-color:var(--clay)}
.contact-loc{font-size:10px; letter-spacing:.18em; text-transform:uppercase; color:var(--muted)}

/* ---------- footer ---------- */
.site-footer{background:transparent; color:var(--muted)}
.site-footer-inner{
  max-width:1400px; margin:0 auto;
  display:flex; justify-content:space-between; flex-wrap:wrap; gap:16px;
  padding:22px clamp(22px,4vw,56px);
  font-size:9.5px; letter-spacing:.14em; text-transform:uppercase;
}
.site-footer a{color:var(--muted); text-decoration:none; border-bottom:1px solid var(--line); padding-bottom:2px}
.site-footer a:hover{color:var(--ink)}
.footer-brand{letter-spacing:.2em}

/* ---------- reveal ---------- */
.js .reveal{opacity:0; transform:translateY(22px); transition:opacity .8s cubic-bezier(.2,.6,.2,1), transform .8s cubic-bezier(.2,.6,.2,1)}
.js .reveal.visible{opacity:1; transform:none}

/* ---------- language ---------- */
html[data-lang="zh"] .lang-en,
html[data-lang="en"] .lang-zh{display:none !important}

/* ---------- responsive ---------- */
@media (max-width:1100px){
  .product-grid{grid-template-columns:1fr 1fr}
}

@media (max-width:980px){
  .hero{grid-template-columns:1fr; gap:40px}
  .hero-art{width:min(70vw,430px); margin:0 auto}
  .story-grid{grid-template-columns:1fr}
  .story blockquote{position:static}
  .timeline{grid-template-columns:1fr 1fr}
  .number-grid{grid-template-columns:1fr 1fr}
  .section-head{grid-template-columns:1fr; gap:22px}
  .product-grid{grid-template-columns:1fr 1fr}
  .cert-grid{grid-template-columns:1fr}
  .principles{grid-template-columns:1fr; gap:30px}
}

@media (max-width:760px){
  .site-header{padding:14px 20px; gap:14px}
  .site-nav{display:none}
  .lang-toggle{margin-left:auto}
  .brand-main{font-size:19px}
  .brand-sub{font-size:9px; letter-spacing:.2em}
  .hero{padding:24px 20px 84px; min-height:calc(100svh - 60px)}
  .hero h1{font-size:clamp(44px,12vw,68px)}
  html[data-lang="zh"] .hero h1{font-size:clamp(42px,11vw,64px)}
  .hero-art{width:min(78vw,340px)}
  .scroll-cue{bottom:16px}
  .section{padding:56px 20px}
  .timeline{grid-template-columns:1fr}
  .number-grid{grid-template-columns:1fr 1fr}
  .product-grid{grid-template-columns:1fr}
  .number{font-size:44px}
  .certifications{padding:0 20px 64px}
  .cert-grid{grid-template-columns:1fr; gap:30px}
  .contact-inner{padding:56px 20px 64px}
  .site-footer-inner{padding:18px 20px; font-size:9px}
  .marquee-track{font-size:9px; gap:18px; letter-spacing:.22em}
}

@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  .ring-text{animation:none}
  .marquee-track{animation:none}
  .scroll-cue svg{animation:none}
  .js .reveal{opacity:1; transform:none; transition:none}
}

/* short laptop screens: keep the cover comfortably inside one viewport */
@media (min-width:981px) and (max-height:700px){
  .hero-art{width:min(34vw,420px)}
  .hero{min-height:auto; padding-top:28px; padding-bottom:84px}
}