/* Hezhou Dolphin E-Commerce — static site styles.
   Palette ref: project 040 (ink / paper / brass). Single accent = brass. */
:root{
  --ink:#0B1B2B; --ink-2:#12263A;
  --paper:#F7F5F0; --paper-2:#EEEAE1;
  --brass:#B98A4B; --brass-dk:#9A6F38;
  --slate:#5B6B7A; --line:#DAD3C6;
  --ok:#2F7D5B; --err:#B4432E;
  --container:1160px; --radius:8px; --radius-sm:6px;
  --shadow:0 1px 2px rgba(11,27,43,.06);
  --font-sans:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,"Helvetica Neue","PingFang SC","Microsoft YaHei","Noto Sans SC",sans-serif;
  --font-display:Georgia,"Times New Roman","Songti SC","Noto Serif SC",serif;
}
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;background:var(--paper);color:var(--ink);font-family:var(--font-sans);font-size:17px;line-height:1.7;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}
img,svg{max-width:100%;display:block}
a{color:inherit;text-decoration:none}

/* i18n visibility (default html data-lang="en") */
html[data-lang="en"] [data-i18n="zh"]{display:none !important}
html[data-lang="zh"] [data-i18n="en"]{display:none !important}

.container{max-width:var(--container);margin-inline:auto;padding-inline:clamp(20px,5vw,40px)}
.section{padding-block:clamp(56px,9vw,112px)}
.section--tight{padding-block:clamp(40px,6vw,72px)}
.section--ink{background:var(--ink);color:var(--paper)}
.section--paper2{background:var(--paper-2)}
.center{text-align:center;margin-inline:auto}

h1,h2,h3,h4{font-family:var(--font-display);font-weight:700;line-height:1.1;letter-spacing:-0.01em;margin:0 0 .5em}
.h-xl{font-size:clamp(2.2rem,5.2vw,3.8rem);line-height:1.05}
.h-lg{font-size:clamp(1.7rem,3vw,2.6rem)}
.h-md{font-size:clamp(1.3rem,2.2vw,1.7rem)}
.eyebrow{font-family:var(--font-sans);font-size:.8rem;font-weight:600;letter-spacing:.14em;text-transform:uppercase;color:var(--brass-dk);margin:0 0 1rem}
.section--ink .eyebrow,.page-head .eyebrow{color:var(--brass)}
.lead{font-size:clamp(1.05rem,1.6vw,1.25rem);color:var(--slate);max-width:64ch}
.section--ink .lead,.page-head .lead{color:#C9D2DA}
p{margin:0 0 1rem}
.muted{color:var(--slate)}

.btn{display:inline-flex;align-items:center;gap:.5em;padding:.8em 1.4em;border-radius:var(--radius-sm);font-weight:600;font-size:.98rem;border:1.5px solid transparent;cursor:pointer;transition:background .18s,border-color .18s,color .18s,transform .18s}
.btn--primary{background:var(--brass);color:var(--ink);border-color:var(--brass)}
.btn--primary:hover{background:var(--brass-dk);border-color:var(--brass-dk)}
.btn--ghost{background:transparent;border-color:currentColor;color:var(--ink)}
.section--ink .btn--ghost,.page-head .btn--ghost{color:var(--paper)}
.btn--ghost:hover{border-color:var(--brass);color:var(--brass)}
.btn:focus-visible{outline:2px solid var(--brass);outline-offset:3px}

.site-header{position:sticky;top:0;z-index:50;background:rgba(247,245,240,.9);-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px);border-bottom:1px solid var(--line)}
.nav{display:flex;align-items:center;justify-content:space-between;gap:1.5rem;min-height:68px}
.brand{display:flex;align-items:center;gap:.65rem;font-weight:700}
.brand svg{width:34px;height:34px;border-radius:9px}
.brand .brand-name{font-family:var(--font-display);font-size:1.05rem;line-height:1.1}
.brand .brand-sub{display:block;font-family:var(--font-sans);font-size:.7rem;font-weight:500;letter-spacing:.03em;color:var(--slate)}
.nav-links{display:flex;align-items:center;gap:1.6rem;list-style:none;margin:0;padding:0}
.nav-links a{font-size:.95rem;font-weight:500;padding:.3em 0;border-bottom:2px solid transparent}
.nav-links a:hover,.nav-links a[aria-current="page"]{border-bottom-color:var(--brass);color:var(--brass-dk)}
.nav-actions{display:flex;align-items:center;gap:.9rem}
.lang-switch{display:inline-flex;border:1px solid var(--line);border-radius:999px;overflow:hidden}
.lang-switch button{background:transparent;border:0;padding:.3em .7em;font-size:.82rem;font-weight:600;color:var(--slate);cursor:pointer}
.lang-switch button[aria-pressed="true"]{background:var(--ink);color:var(--paper)}
.nav-toggle{display:none;background:transparent;border:0;cursor:pointer;padding:.4em;color:var(--ink)}
.nav-toggle svg{width:26px;height:26px}

.hero{background:var(--ink);color:var(--paper)}
.hero .container{display:grid;grid-template-columns:1.1fr .9fr;gap:clamp(32px,5vw,64px);align-items:center;padding-block:clamp(64px,10vw,128px)}
.hero h1{color:var(--paper)}
.hero .lead{color:#C9D2DA}
.hero-cta{display:flex;flex-wrap:wrap;gap:1rem;margin-top:2rem}
.hero-art{position:relative;aspect-ratio:1/1;max-width:420px;margin-inline:auto;width:100%}
.hero-art svg{width:100%;height:100%}

.grid{display:grid;gap:clamp(18px,2.4vw,28px)}
.grid--2{grid-template-columns:repeat(2,1fr)}
.grid--3{grid-template-columns:repeat(3,1fr)}
.grid--4{grid-template-columns:repeat(4,1fr)}
.card{background:var(--paper);border:1px solid var(--line);border-radius:var(--radius);padding:clamp(22px,3vw,32px);box-shadow:var(--shadow);transition:border-color .18s,transform .18s}
.card:hover{border-color:var(--brass);transform:translateY(-2px)}
.card .ic{width:40px;height:40px;color:var(--brass-dk);margin-bottom:1rem}
.card h3{font-size:1.2rem;margin-bottom:.4rem}
.card p{color:var(--slate);font-size:.98rem;margin:0}
.section--ink .card{background:var(--ink-2);border-color:#1d344a}
.section--ink .card p{color:#AEBAC6}
.section--ink .card .ic{color:var(--brass)}

.stats{display:grid;grid-template-columns:repeat(4,1fr);gap:1.5rem;text-align:center}
.stat .num{font-family:var(--font-display);font-size:clamp(1.8rem,4vw,2.8rem);color:var(--brass);line-height:1}
.stat .lbl{font-size:.9rem;color:var(--slate);margin-top:.4rem}
.section--ink .stat .lbl{color:#AEBAC6}

.steps{counter-reset:step;display:grid;gap:1.2rem;max-width:760px}
.step{display:flex;gap:1rem;align-items:flex-start}
.step .n{flex:0 0 auto;width:38px;height:38px;border-radius:50%;border:1.5px solid var(--brass);color:var(--brass-dk);display:grid;place-items:center;font-weight:700;font-family:var(--font-display)}
.step h4{margin:.3rem 0 .2rem;font-size:1.05rem}
.step p{margin:0;color:var(--slate);font-size:.95rem}

.page-head{background:var(--ink);color:var(--paper)}
.page-head .container{padding-block:clamp(48px,7vw,88px)}
.page-head h1{color:var(--paper)}

.prose{max-width:74ch}
.prose h2{font-size:1.4rem;margin-top:2.2rem}
.prose h3{font-size:1.12rem;margin-top:1.5rem}
.prose p,.prose li{color:#2c3d4d}
.prose ul{padding-inline-start:1.2rem}
.prose li{margin-bottom:.4rem}

.split{display:grid;grid-template-columns:1fr 1fr;gap:clamp(28px,4vw,56px);align-items:center}
.contact-grid{display:grid;grid-template-columns:1.1fr .9fr;gap:clamp(28px,4vw,56px);align-items:start}
.info-list{list-style:none;margin:0;padding:0;display:grid;gap:1.3rem}
.info-list li{display:flex;gap:.9rem;align-items:flex-start}
.info-list .ic{flex:0 0 auto;width:26px;height:26px;color:var(--brass-dk);margin-top:2px}
.info-list .k{display:block;font-size:.78rem;letter-spacing:.08em;text-transform:uppercase;color:var(--slate)}
.info-list .v{font-weight:600}
.field{display:block;margin-bottom:1rem}
.field label{display:block;font-size:.85rem;font-weight:600;margin-bottom:.35rem}
.field input,.field textarea{width:100%;padding:.7em .85em;border:1px solid var(--line);border-radius:var(--radius-sm);font:inherit;background:#fff;color:var(--ink)}
.field input:focus,.field textarea:focus{outline:2px solid var(--brass);outline-offset:1px;border-color:var(--brass)}
.form-note{font-size:.85rem;color:var(--slate);margin-top:.5rem}

.site-footer{background:var(--ink);color:#C9D2DA;font-size:.92rem}
.site-footer .container{padding-block:clamp(44px,6vw,72px)}
.footer-top{display:grid;grid-template-columns:1.6fr 1fr 1.2fr;gap:2rem}
.site-footer h4{color:var(--paper);font-family:var(--font-sans);font-size:.82rem;letter-spacing:.1em;text-transform:uppercase;margin:0 0 1rem}
.site-footer a:hover{color:var(--brass)}
.site-footer ul{list-style:none;margin:0;padding:0;display:grid;gap:.6rem}
.footer-brand .brand-name{color:var(--paper);font-family:var(--font-display);font-size:1.2rem}
.footer-bottom{margin-top:2.5rem;padding-top:1.5rem;border-top:1px solid #1d344a;display:flex;flex-wrap:wrap;gap:1rem;justify-content:space-between;color:#8b98a5;font-size:.85rem}

.reveal{opacity:0;transform:translateY(16px);transition:opacity .5s ease-out,transform .5s ease-out}
.reveal.in{opacity:1;transform:none}

@media (max-width:900px){
  .hero .container{grid-template-columns:1fr}
  .hero-art{order:-1;max-width:300px}
  .grid--4{grid-template-columns:repeat(2,1fr)}
  .grid--3{grid-template-columns:repeat(2,1fr)}
  .stats{grid-template-columns:repeat(2,1fr)}
  .split,.contact-grid{grid-template-columns:1fr}
  .footer-top{grid-template-columns:1fr 1fr}
}
@media (max-width:640px){
  .nav-links,.nav-actions .btn{display:none}
  .nav-toggle{display:inline-flex}
  body.nav-open .nav-links{display:flex;position:absolute;top:68px;left:0;right:0;flex-direction:column;background:var(--paper);border-bottom:1px solid var(--line);padding:1rem clamp(20px,5vw,40px);gap:1rem}
  .grid--2,.grid--3,.grid--4{grid-template-columns:1fr}
  .footer-top{grid-template-columns:1fr}
}
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{animation:none !important;transition:none !important;scroll-behavior:auto !important}
  .reveal{opacity:1;transform:none}
}