/* =========================================================
   Pine Wind Studio · 松风
   Design system — drawn from clay, ink, rice-paper and fire.
   Authentic 中式美学 for a Western eye. Restraint over ornament.
   ========================================================= */

:root {
  /* — clay & earth — */
  --ink:        #15120e;   /* warm near-black — drama, ground */
  --ink-soft:   #1d1812;
  --ink-90:     rgba(21,18,14,.90);
  --umber:      #3a2a20;   /* 紫泥 purple clay */
  --clay:       #b9824f;   /* 段泥 duan ni tan */
  --clay-light: #cda079;
  --amber:      #a86a3d;   /* 柴烧 wood-fire amber */
  --stone:      #6f655a;
  --mist:       #b7ad9e;

  /* — paper & light — */
  --paper:      #f3ede1;   /* rice-paper warm white */
  --paper-dim:  #e8decd;
  --paper-deep: #ddd0ba;

  /* — the single accent: seal cinnabar (印泥) — used like a stamp, rarely — */
  --seal:       #9c3a2c;
  --celadon:    #889a86;

  /* type */
  --serif: "Cormorant Garamond", "Songti SC", Georgia, "Times New Roman", serif;
  --sans:  "Inter", "PingFang SC", "Helvetica Neue", system-ui, sans-serif;
  --han:   "Noto Serif SC", "Songti SC", "STSong", serif;
  --brush: "Ma Shan Zheng", "Noto Serif SC", "STKaiti", cursive;

  /* rhythm */
  --gutter: clamp(20px, 5vw, 90px);
  --maxw: 1320px;
  --ease: cubic-bezier(.22, .61, .36, 1);

  --label-tracking: .28em;
}

/* ---------- reset ---------- */
*, *::before, *::after { box-sizing: border-box; }
* { margin: 0; padding: 0; }
html { -webkit-font-smoothing: antialiased; text-rendering: optimizeLegibility; scroll-behavior: smooth; }
body {
  font-family: var(--sans);
  background: var(--paper);
  color: var(--ink);
  font-size: 17px;
  line-height: 1.75;
  font-weight: 350;
  overflow-x: hidden;
}
img, video { display: block; max-width: 100%; height: auto; }
a { color: inherit; text-decoration: none; }
button { font: inherit; cursor: pointer; background: none; border: none; color: inherit; }

/* ---------- type primitives ---------- */
.display {
  font-family: var(--serif);
  font-weight: 300;
  line-height: 1.04;
  letter-spacing: .005em;
  font-size: clamp(2.6rem, 7vw, 6rem);
}
.h2 {
  font-family: var(--serif);
  font-weight: 300;
  line-height: 1.1;
  font-size: clamp(2rem, 4.4vw, 3.6rem);
  letter-spacing: .01em;
}
.h3 {
  font-family: var(--serif);
  font-weight: 400;
  font-size: clamp(1.5rem, 2.6vw, 2.2rem);
  line-height: 1.18;
}
.eyebrow {
  font-family: var(--sans);
  font-weight: 500;
  font-size: .72rem;
  letter-spacing: var(--label-tracking);
  text-transform: uppercase;
}
.han { font-family: var(--han); font-weight: 500; }
.brush { font-family: var(--brush); font-weight: 400; }
.lede {
  font-family: var(--serif);
  font-size: clamp(1.35rem, 2.3vw, 1.9rem);
  line-height: 1.5;
  font-weight: 300;
  font-style: italic;
  color: var(--umber);
}
.measure { max-width: 62ch; }
.measure-sm { max-width: 44ch; }

/* seal — the cinnabar stamp motif */
.seal-mark {
  display: inline-grid;
  place-items: center;
  width: 2.6em; height: 2.6em;
  background: var(--seal);
  color: var(--paper);
  font-family: var(--han);
  font-size: .9rem;
  line-height: 1;
  border-radius: 4px;
  box-shadow: 0 0 0 1px rgba(255,255,255,.06) inset;
  letter-spacing: 0;
}

/* ---------- layout ---------- */
.wrap { width: 100%; max-width: var(--maxw); margin-inline: auto; padding-inline: var(--gutter); }
.section { padding-block: clamp(64px, 12vh, 160px); }
.section--tight { padding-block: clamp(48px, 8vh, 110px); }
.dark { background: var(--ink); color: var(--paper); }
.dark .lede { color: var(--clay-light); }
.paper-deep { background: var(--paper-dim); }

/* ---------- buttons / links ---------- */
.btn {
  display: inline-flex; align-items: center; gap: .7em;
  font-family: var(--sans); font-weight: 500;
  font-size: .76rem; letter-spacing: var(--label-tracking); text-transform: uppercase;
  padding: 1.05em 1.9em;
  border: 1px solid currentColor;
  border-radius: 2px;
  transition: background .5s var(--ease), color .5s var(--ease), opacity .4s;
  color: var(--ink);
}
.btn:hover { background: var(--ink); color: var(--paper); }
.dark .btn, .hero .btn { color: var(--paper); }
.dark .btn:hover, .hero .btn:hover { background: var(--paper); color: var(--ink); }
.btn--seal { border-color: var(--seal); color: var(--seal); }
.btn--seal:hover { background: var(--seal); color: var(--paper); }

.link-underline {
  display: inline-flex; align-items: center; gap: .6em;
  font-family: var(--sans); font-weight: 500;
  font-size: .76rem; letter-spacing: var(--label-tracking); text-transform: uppercase;
  padding-bottom: .35em;
  border-bottom: 1px solid currentColor;
  transition: gap .4s var(--ease), opacity .3s;
}
.link-underline:hover { gap: 1em; }
.link-underline .arrow { transition: transform .4s var(--ease); }
.link-underline:hover .arrow { transform: translateX(4px); }

/* ---------- header ---------- */
.site-header {
  position: fixed; inset: 0 0 auto 0; z-index: 100;
  display: flex; align-items: center; justify-content: space-between;
  padding: 22px var(--gutter);
  color: var(--paper);
  transition: background .6s var(--ease), color .6s var(--ease), padding .5s var(--ease), box-shadow .6s;
}
.site-header.solid {
  background: var(--paper);
  color: var(--ink);
  padding-block: 14px;
  box-shadow: 0 1px 0 rgba(21,18,14,.08);
}
.brandmark { display: flex; align-items: baseline; gap: .65rem; }
.brandmark .cn { font-family: var(--han); font-size: 1.35rem; letter-spacing: .12em; font-weight: 500; }
.brandmark .en {
  font-family: var(--serif); font-size: 1.15rem; font-weight: 400; letter-spacing: .12em;
  text-transform: uppercase;
}
.nav { display: flex; align-items: center; gap: clamp(18px, 2.4vw, 40px); }
.nav a {
  font-family: var(--sans); font-size: .74rem; font-weight: 500;
  letter-spacing: .2em; text-transform: uppercase; opacity: .85;
  position: relative; padding-block: 4px;
  transition: opacity .3s;
}
.nav a::after {
  content:""; position:absolute; left:0; bottom:0; height:1px; width:0; background:currentColor;
  transition: width .4s var(--ease);
}
.nav a:hover { opacity: 1; }
.nav a:hover::after { width:100%; }
.nav .cart { font-family: var(--serif); font-size: .95rem; letter-spacing: .04em; }
.nav-toggle { display:none; }

/* ---------- hero ---------- */
.hero {
  position: relative; min-height: 100svh;
  display: grid; align-items: end;
  color: var(--paper);
  overflow: hidden;
}
.hero__media { position:absolute; inset:0; z-index:0; }
.hero__media img { width:100%; height:100%; object-fit:cover; }
.hero__media::after {
  content:""; position:absolute; inset:0;
  background:
    radial-gradient(120% 90% at 70% 30%, rgba(21,18,14,.15), rgba(21,18,14,.78) 75%),
    linear-gradient(180deg, rgba(21,18,14,.45) 0%, rgba(21,18,14,.1) 35%, rgba(21,18,14,.85) 100%);
}
.hero__inner { position:relative; z-index:2; width:100%; }
.hero__cn {
  font-family: var(--brush);
  font-size: clamp(5rem, 18vw, 15rem);
  line-height:.9; color: var(--paper);
  opacity:.96; margin-bottom: .1em;
  text-shadow: 0 8px 60px rgba(0,0,0,.5);
}
.hero__headline { max-width: 18ch; }
.hero__sub { margin-top: 1.4rem; max-width: 46ch; color: var(--paper-dim); font-size: 1.05rem; }
.hero__cta { margin-top: 2.6rem; display:flex; gap: 1.2rem; flex-wrap:wrap; }
.hero__scroll {
  position:absolute; left: var(--gutter); bottom: 26px; z-index:2;
  font-family:var(--sans); font-size:.66rem; letter-spacing:.3em; text-transform:uppercase;
  display:flex; align-items:center; gap:.8em; opacity:.7;
}
.hero__scroll .line { width:46px; height:1px; background:currentColor; transform-origin:left; animation: scrollline 2.6s var(--ease) infinite; }
@keyframes scrollline { 0%,100%{transform:scaleX(.3);opacity:.4} 50%{transform:scaleX(1);opacity:1} }

/* ---------- intro / philosophy ---------- */
.intro { text-align:center; }
.intro .eyebrow { color: var(--seal); display:block; margin-bottom: 1.6rem; }
.intro__char {
  font-family:var(--brush); font-size: clamp(4rem,10vw,8rem); color: var(--paper-deep);
  line-height:1; margin-bottom: .2em; user-select:none;
}
.divider-cn { display:flex; align-items:center; justify-content:center; gap:1.2rem; margin: 2.4rem 0; color: var(--stone); }
.divider-cn span { height:1px; width:min(120px, 22vw); background: linear-gradient(90deg, transparent, var(--stone)); }
.divider-cn span:last-child { background: linear-gradient(90deg, var(--stone), transparent); }
.divider-cn .han { font-size: 1.1rem; letter-spacing:.2em; }

/* ---------- two masters ---------- */
.masters { display:grid; grid-template-columns: 1fr 1fr; }
.master {
  position:relative; min-height: clamp(520px, 80vh, 820px);
  display:flex; align-items:flex-end; overflow:hidden;
  color: var(--paper);
}
.master img { position:absolute; inset:0; width:100%; height:100%; object-fit:cover; transition: transform 1.4s var(--ease); filter: saturate(.96); }
.master::after { content:""; position:absolute; inset:0; background: linear-gradient(180deg, rgba(21,18,14,.05) 0%, rgba(21,18,14,.15) 40%, rgba(21,18,14,.92) 100%); }
.master:hover img { transform: scale(1.04); }
.master__body { position:relative; z-index:2; padding: clamp(28px,4vw,56px); }
.master__body .eyebrow { color: var(--clay-light); }
.master__name { font-family:var(--serif); font-weight:300; font-size: clamp(2rem,3.4vw,3rem); margin: .35rem 0 .2rem; }
.master__name .han { font-size:.5em; opacity:.8; margin-left:.6em; letter-spacing:.1em; }
.master__craft { color: var(--paper-dim); max-width: 38ch; margin-bottom:1.4rem; font-size: .98rem; }

/* ---------- film (渔) ---------- */
.film { display:grid; grid-template-columns: minmax(0, 1.05fr) minmax(0, 1fr); gap: clamp(32px,6vw,90px); align-items:center; }
.film__video { position:relative; justify-self:center; width:100%; max-width: 380px; }
.film__video video {
  width:100%; aspect-ratio: 9/16; object-fit:cover; border-radius:3px;
  box-shadow: 0 40px 90px -30px rgba(0,0,0,.8), 0 0 0 1px rgba(255,255,255,.05);
  background: var(--ink-soft);
}
.film__badge {
  position:absolute; top:18px; left:18px; z-index:3;
  display:flex; align-items:center; gap:.6em;
  font-family:var(--sans); font-size:.62rem; letter-spacing:.24em; text-transform:uppercase; color:var(--paper);
  background: rgba(21,18,14,.45); backdrop-filter: blur(6px); padding:.55em .85em; border-radius:2px;
}
.film__badge .dot { width:6px; height:6px; border-radius:50%; background: var(--seal); animation: pulse 2s infinite; }
@keyframes pulse { 0%,100%{opacity:1} 50%{opacity:.3} }
.film__char { font-family:var(--brush); font-size: clamp(3.4rem,7vw,6rem); color: var(--clay-light); line-height:1; }
.film__meta { font-family:var(--sans); font-size:.78rem; letter-spacing:.18em; text-transform:uppercase; color:var(--stone); margin-top: 1.8rem; display:grid; gap:.5rem; }
.film__meta b { color: var(--paper-dim); font-weight:500; }

/* ---------- collections ---------- */
.collections { display:grid; grid-template-columns: repeat(3, 1fr); gap: clamp(14px, 2vw, 30px); }
.col-card { position:relative; display:block; overflow:hidden; background: var(--umber); aspect-ratio: 3/4; color: var(--paper); border-radius:2px; }
.col-card img { position:absolute; inset:0; width:100%; height:100%; object-fit:cover; transition: transform 1.2s var(--ease), filter 1.2s; filter: brightness(.82) saturate(.95); }
.col-card::after { content:""; position:absolute; inset:0; background: linear-gradient(180deg, transparent 30%, rgba(21,18,14,.85)); }
.col-card:hover img { transform: scale(1.05); filter: brightness(.9); }
.col-card__body { position:absolute; inset:auto 0 0 0; z-index:2; padding: clamp(20px,2.4vw,34px); }
.col-card__num { font-family:var(--serif); font-style:italic; opacity:.7; font-size:.9rem; }
.col-card__title { font-family:var(--serif); font-weight:300; font-size: clamp(1.5rem,2.2vw,2.1rem); margin:.1rem 0 .5rem; }
.col-card__title .han { font-size:.55em; opacity:.75; margin-left:.5em; }
.col-card__desc { font-size:.9rem; color: var(--paper-dim); max-width: 34ch; opacity:0; max-height:0; transition: opacity .5s, max-height .6s var(--ease); }
.col-card:hover .col-card__desc { opacity:1; max-height: 120px; }

/* ---------- editorial split (journal / about) ---------- */
.split { display:grid; grid-template-columns: 1fr 1fr; gap: clamp(28px,5vw,80px); align-items:center; }
.split__media img { width:100%; aspect-ratio: 4/5; object-fit:cover; border-radius:2px; }
.split--rev .split__media { order:2; }

/* ---------- product grid ---------- */
.product-grid { display:grid; grid-template-columns: repeat(3, 1fr); gap: clamp(16px,2.4vw,40px); }
.product { display:block; }
.product__media { position:relative; overflow:hidden; background: var(--paper-deep); aspect-ratio: 4/5; border-radius:2px; }
.product__media img { width:100%; height:100%; object-fit:cover; transition: transform 1.1s var(--ease); }
.product:hover .product__media img { transform: scale(1.045); }
.product__tag { position:absolute; top:14px; left:14px; font-family:var(--sans); font-size:.6rem; letter-spacing:.2em; text-transform:uppercase; background: var(--paper); color:var(--ink); padding:.4em .7em; border-radius:2px; }
.product__name { font-family:var(--serif); font-size:1.4rem; font-weight:400; margin-top:1rem; }
.product__maker { font-family:var(--sans); font-size:.72rem; letter-spacing:.16em; text-transform:uppercase; color: var(--stone); margin-top:.25rem; }
.product__price { font-family:var(--serif); font-style:italic; font-size:1.1rem; margin-top:.5rem; color: var(--umber); }

/* ---------- newsletter ---------- */
.signup { text-align:center; }
.signup form { display:flex; gap:.6rem; max-width: 460px; margin: 2rem auto 0; flex-wrap:wrap; justify-content:center; }
.signup input {
  flex:1 1 240px; background:transparent; border:none; border-bottom:1px solid var(--stone);
  padding:.9em .2em; font-family:var(--serif); font-size:1.05rem; color:inherit;
}
.signup input::placeholder { color: var(--stone); }
.signup input:focus { outline:none; border-color: var(--seal); }

/* ---------- footer ---------- */
.site-footer { background: var(--ink); color: var(--mist); padding-block: clamp(56px,8vh,96px); }
.footer-grid { display:grid; grid-template-columns: 1.4fr 1fr 1fr 1fr; gap: clamp(28px,4vw,60px); }
.site-footer h4 { font-family:var(--sans); font-size:.7rem; letter-spacing:.22em; text-transform:uppercase; color: var(--paper-dim); margin-bottom:1.2rem; font-weight:600; }
.site-footer ul { list-style:none; display:grid; gap:.7rem; }
.site-footer a { font-size:.92rem; opacity:.78; transition:opacity .3s; }
.site-footer a:hover { opacity:1; color: var(--paper); }
.footer-brand .cn { font-family:var(--brush); font-size:3rem; color:var(--paper); line-height:1; }
.footer-brand .en { font-family:var(--serif); letter-spacing:.16em; text-transform:uppercase; font-size:1.05rem; color:var(--paper-dim); margin-top:.4rem; }
.footer-bottom { display:flex; justify-content:space-between; gap:1rem; flex-wrap:wrap; margin-top: clamp(40px,6vh,70px); padding-top: 1.6rem; border-top:1px solid rgba(255,255,255,.1); font-size:.78rem; opacity:.6; }

/* ---------- ambient sound toggle ---------- */
.sound-toggle{
  position:fixed; left:18px; bottom:18px; z-index:120;
  display:flex; align-items:center; gap:.55em;
  padding:.6em .9em; border-radius:30px;
  background:rgba(21,18,14,.55); color:var(--paper); backdrop-filter:blur(8px);
  border:1px solid rgba(244,239,225,.18);
  font-family:var(--sans); font-size:.62rem; letter-spacing:.2em; text-transform:uppercase;
  cursor:pointer; transition:opacity .4s var(--ease), background .4s; opacity:.65;
}
.sound-toggle:hover{ opacity:1; }
.sound-toggle .lbl{ opacity:.85; }
.sound-toggle .bars{ display:inline-flex; align-items:flex-end; gap:2px; height:12px; }
.sound-toggle .bars i{ width:2px; height:4px; background:var(--clay-light); border-radius:1px; transition:height .3s; }
.sound-toggle.on .bars i{ animation:eq 1s ease-in-out infinite; }
.sound-toggle.on .bars i:nth-child(2){ animation-delay:.2s; }
.sound-toggle.on .bars i:nth-child(3){ animation-delay:.4s; }
@keyframes eq{ 0%,100%{height:4px} 50%{height:12px} }
.sound-toggle:not(.on) .bars i{ height:3px; opacity:.5; }
@media (max-width:560px){ .sound-toggle{ left:12px; bottom:12px; padding:.5em .75em; } }

/* ---------- cart drawer ---------- */
.cart-overlay{ position:fixed; inset:0; background:rgba(21,18,14,.5); opacity:0; visibility:hidden; transition:opacity .4s var(--ease), visibility .4s; z-index:200; }
.cart-overlay.open{ opacity:1; visibility:visible; }
.cart-drawer{ position:fixed; top:0; right:0; height:100%; width:min(420px,92vw); background:var(--paper); color:var(--ink);
  transform:translateX(100%); transition:transform .5s var(--ease); z-index:201; display:flex; flex-direction:column; box-shadow:-20px 0 60px -20px rgba(0,0,0,.4); }
.cart-drawer.open{ transform:none; }
.cart-drawer__head{ display:flex; align-items:center; justify-content:space-between; padding:22px var(--gutter); border-bottom:1px solid rgba(21,18,14,.1); }
.cart-drawer__head h3{ font-family:var(--serif); font-weight:400; font-size:1.4rem; }
.cart-close{ font-size:1.4rem; line-height:1; color:var(--stone); }
.cart-items{ flex:1; overflow-y:auto; padding:8px var(--gutter); }
.cart-empty{ text-align:center; color:var(--stone); font-family:var(--serif); font-style:italic; padding:3rem 1rem; }
.cart-row{ display:grid; grid-template-columns:64px 1fr auto; gap:1rem; align-items:center; padding:1.1rem 0; border-bottom:1px solid rgba(21,18,14,.08); }
.cart-row img{ width:64px; height:80px; object-fit:cover; border-radius:2px; background:var(--paper-dim); }
.cart-row .nm{ font-family:var(--serif); font-size:1.05rem; line-height:1.2; }
.cart-row .mk{ font-size:.72rem; color:var(--stone); margin-top:.2rem; }
.cart-row .qty{ display:inline-flex; align-items:center; gap:.6rem; margin-top:.4rem; font-size:.85rem; }
.cart-row .qty button{ width:22px; height:22px; border:1px solid rgba(21,18,14,.2); border-radius:2px; color:var(--stone); }
.cart-row .pr{ font-family:var(--serif); font-style:italic; color:var(--umber); white-space:nowrap; }
.cart-row .rm{ display:block; font-size:.66rem; letter-spacing:.1em; text-transform:uppercase; color:var(--stone); margin-top:.5rem; text-align:right; }
.cart-foot{ padding:18px var(--gutter) 26px; border-top:1px solid rgba(21,18,14,.1); }
.cart-foot .sub{ display:flex; justify-content:space-between; font-family:var(--serif); font-size:1.2rem; margin-bottom:1rem; }
.cart-foot .btn{ width:100%; justify-content:center; }
.cart-foot .note{ font-size:.74rem; color:var(--stone); text-align:center; margin-top:.8rem; }

/* ---------- scroll reveal ---------- */
.reveal { opacity:0; transform: translateY(26px); transition: opacity 1s var(--ease), transform 1s var(--ease); }
.reveal.in { opacity:1; transform:none; }
.reveal.d1 { transition-delay:.12s; }
.reveal.d2 { transition-delay:.24s; }
.reveal.d3 { transition-delay:.36s; }
@media (prefers-reduced-motion: reduce) {
  .reveal { opacity:1 !important; transform:none !important; }
  * { animation: none !important; scroll-behavior:auto; }
}

/* ---------- responsive ---------- */
@media (max-width: 900px) {
  body { font-size: 16px; }
  .masters { grid-template-columns: 1fr; }
  .film { grid-template-columns: 1fr; gap: 2.4rem; }
  .film__meta { justify-items:center; text-align:center; }
  .collections { grid-template-columns: 1fr; }
  .product-grid { grid-template-columns: 1fr 1fr; }
  .split { grid-template-columns: 1fr; }
  .split--rev .split__media { order:0; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .nav { display:none; position:fixed; inset:0; background:var(--ink); color:var(--paper);
         flex-direction:column; justify-content:center; gap:2rem; font-size:1.1rem; z-index:99; }
  .nav.open { display:flex; }
  .nav a { font-size:1rem; }
  .nav-toggle { display:flex; flex-direction:column; gap:5px; z-index:101; }
  .nav-toggle span { width:26px; height:1.5px; background:currentColor; transition: transform .4s var(--ease), opacity .3s; }
  .nav-toggle.open span:nth-child(1){ transform: translateY(6.5px) rotate(45deg); }
  .nav-toggle.open span:nth-child(2){ opacity:0; }
  .nav-toggle.open span:nth-child(3){ transform: translateY(-6.5px) rotate(-45deg); }
}
@media (max-width: 560px) {
  .product-grid { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; }
  .hero__cta .btn { width:100%; justify-content:center; }
}