/* ==========================================================
   承古丝 · 造今饰 — 手作蚕丝首饰独立站
   风格基调源自作品集 PDF：暖黑 × 宣纸米 × 古铜金，衬线字体
   ========================================================== */
:root{
  --bg:#161210;
  --bg-soft:#1e1813;
  --paper:#e9dfcb;
  --ink:#f1e8d6;
  --ink-dim:#b3a58c;
  --gold:#c8b088;
  --line:rgba(233,223,203,.14);
  --serif:"Noto Serif SC","Source Han Serif SC","STSong","SimSun",serif;
  --en:"Cormorant Garamond",Georgia,serif;
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  background:var(--bg);
  color:var(--ink);
  font-family:var(--serif);
  font-weight:300;
  line-height:1.9;
  letter-spacing:.06em;
  overflow-x:hidden;
}
img{display:block;max-width:100%}
a{color:inherit;text-decoration:none}
::selection{background:var(--gold);color:#161210}

/* ---------- 通用 ---------- */
.reveal{opacity:0;transform:translateY(26px);transition:opacity .9s ease,transform .9s ease}
.reveal.on{opacity:1;transform:none}
.delay-1{transition-delay:.15s}
.delay-2{transition-delay:.3s}
.delay-3{transition-delay:.45s}

.section-no{
  font-size:.85rem;color:var(--gold);letter-spacing:.5em;margin-bottom:.8rem;
}
.section-no.light{color:rgba(241,232,214,.75)}
.section-head{text-align:center;padding:0 1.4rem;margin-bottom:3.2rem}
.section-head h2{
  font-weight:300;font-size:clamp(1.6rem,3.6vw,2.4rem);
  letter-spacing:.28em;text-indent:.28em;
}
.section-head h2 em{
  display:block;font-family:var(--en);font-style:normal;font-weight:300;
  font-size:.78rem;color:var(--ink-dim);letter-spacing:.42em;margin-top:.55rem;
}
.section-lede{color:var(--ink-dim);font-size:.92rem;margin-top:1.1rem}

/* ---------- 导航 ---------- */
.nav{
  position:fixed;inset:0 0 auto 0;z-index:50;
  transition:background .5s ease,border-color .5s ease;
  border-bottom:1px solid transparent;
}
.nav.scrolled{background:rgba(22,18,16,.86);backdrop-filter:blur(10px);border-color:var(--line)}
.nav-inner{
  max-width:1280px;margin:0 auto;padding:1.05rem 1.6rem;
  display:flex;align-items:center;justify-content:space-between;gap:1rem;
}
.brand{display:flex;align-items:center;gap:.7rem}
.brand-seal{
  width:2.1rem;height:2.1rem;display:grid;place-items:center;
  background:var(--gold);color:#161210;font-weight:600;font-size:1.12rem;border-radius:4px;
}
.brand-name{letter-spacing:.24em;font-size:1.02rem}
.brand-name i{color:var(--gold);font-style:normal}
.nav-links{display:flex;gap:2.1rem}
.nav-links a{
  font-size:.88rem;letter-spacing:.22em;color:var(--ink-dim);
  padding-bottom:.25rem;border-bottom:1px solid transparent;transition:.35s;
}
.nav-links a:hover{color:var(--ink);border-color:var(--gold)}
.nav-toggle{display:none;background:none;border:none;cursor:pointer;padding:.4rem}
.nav-toggle span{display:block;width:20px;height:1px;background:var(--ink);margin:5px 0;transition:.3s}

/* ---------- 首屏 ---------- */
.hero{
  position:relative;min-height:100svh;
  max-width:1280px;margin:0 auto;
  display:grid;grid-template-columns:1.05fr .95fr;align-items:center;gap:3vw;
  padding:7.2rem 1.6rem 4rem;
}
.hero-text{max-width:34rem}
.hero-eyebrow{color:var(--gold);letter-spacing:.62em;font-size:.8rem;margin-bottom:2rem}
.hero-title{
  font-weight:200;line-height:1.45;
  font-size:clamp(2.1rem,4.6vw,3.4rem);letter-spacing:.1em;
}
.hero-title .dot{color:var(--gold)}
.hero-slogan{
  margin-top:1.6rem;font-size:1.15rem;letter-spacing:.5em;color:var(--gold);
}
.hero-sub{margin-top:1.5rem;color:var(--ink-dim);font-size:.94rem}
.btn-line{
  display:inline-block;margin-top:2.6rem;padding:.95rem 2.7rem;
  border:1px solid var(--gold);color:var(--ink);
  letter-spacing:.42em;text-indent:.42em;font-size:.88rem;
  transition:.4s;
}
.btn-line:hover{background:var(--gold);color:#161210}
.hero-figure{
  height:min(82vh,46rem);overflow:hidden;
  border:1px solid var(--line);
}
.hero-figure img{width:100%;height:100%;object-fit:cover}
.scroll-hint{
  position:absolute;left:50%;bottom:1.6rem;transform:translateX(-50%);
  color:var(--ink-dim);font-size:.72rem;letter-spacing:.4em;display:flex;flex-direction:column;align-items:center;gap:.5rem;
}
.scroll-hint span{width:1px;height:44px;background:linear-gradient(var(--gold),transparent);animation:drip 2.2s infinite}
@keyframes drip{0%{transform:scaleY(0);transform-origin:top}55%{transform:scaleY(1);transform-origin:top}56%{transform-origin:bottom}100%{transform:scaleY(0);transform-origin:bottom}}

/* ---------- 作品网格 ---------- */
.works{max-width:1280px;margin:0 auto;padding:7rem 1.6rem 4.5rem}
.works-alt{padding-top:2rem}
.grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(240px,1fr));gap:1.35rem}
.card{
  position:relative;cursor:pointer;overflow:hidden;background:var(--bg-soft);
  border:1px solid var(--line);
}
.card figure{aspect-ratio:3/4;overflow:hidden}
.card img{
  width:100%;height:100%;object-fit:cover;
  filter:saturate(.96);
  transform:scale(1.02);transition:transform 1.1s cubic-bezier(.2,.7,.25,1),filter .8s;
}
.card:hover img{transform:scale(1.09)}
.card-veil{
  position:absolute;inset:auto 0 0 0;padding:2.6rem 1.15rem 1.05rem;
  background:linear-gradient(transparent,rgba(12,9,7,.88));
}
.card-no{font-family:var(--en);font-size:.72rem;letter-spacing:.34em;color:var(--gold)}
.card-name{
  font-size:1.04rem;letter-spacing:.3em;margin-top:.28rem;font-weight:400;
}
.card-hint{
  position:absolute;top:.95rem;right:1rem;color:var(--ink-dim);
  font-size:.7rem;letter-spacing:.3em;opacity:0;transition:.45s;
}
.card:hover .card-hint{opacity:1;color:var(--gold)}

/* ---------- 工艺 ---------- */
.craft{position:relative;padding:8.5rem 1.6rem;overflow:hidden}
.craft-bg{
  position:absolute;inset:0;
  background:url("../assets/work/w036_gufa_qusi.jpg") center/cover no-repeat;
  filter:brightness(.32) saturate(.85) blur(2px);
  transform:scale(1.06);
}
.craft-bg::after{content:"";position:absolute;inset:0;background:radial-gradient(ellipse at center,transparent 0%,rgba(15,11,9,.9) 100%)}
.craft-panel{
  position:relative;max-width:900px;margin:0 auto;text-align:center;
}
.craft-panel h2{font-weight:300;letter-spacing:.3em;font-size:clamp(1.5rem,3.4vw,2.3rem);text-indent:.3em}
.craft-quote{
  margin-top:2rem;color:var(--ink);opacity:.92;letter-spacing:.34em;
  font-size:1.02rem;line-height:2.5;font-weight:300;
}
.craft-list{
  list-style:none;margin-top:3.4rem;
  display:grid;grid-template-columns:repeat(auto-fit,minmax(170px,1fr));gap:1.1rem;
  text-align:center;
}
.craft-list b{
  display:block;font-weight:400;font-size:1.22rem;letter-spacing:.5em;text-indent:.5em;
  color:var(--gold);margin-bottom:.5rem;
}
.craft-list span{font-size:.84rem;color:var(--ink-dim)}

/* ---------- 品牌故事 ---------- */
.story{padding:8rem 1.6rem;border-top:1px solid var(--line)}
.story-inner{max-width:760px;margin:0 auto;text-align:center}
.story-text{
  margin-top:2.4rem;font-size:clamp(1rem,2vw,1.18rem);
  line-height:2.5;color:var(--ink);opacity:.94;font-weight:300;
}
.story-sign{margin-top:2.6rem;color:var(--gold);letter-spacing:.4em;font-size:.9rem}

/* ---------- 联系 ---------- */
.contact{padding:7.5rem 1.6rem;border-top:1px solid var(--line)}
.contact-cards{
  max-width:1080px;margin:0 auto;display:grid;
  grid-template-columns:repeat(auto-fit,minmax(230px,1fr));gap:1.3rem;
}
.c-card{
  display:block;color:inherit;text-decoration:none;
  border:1px solid var(--line);padding:2.4rem 1.6rem;text-align:center;
  transition:border-color .4s,transform .4s;
}
.c-card:hover{border-color:var(--gold);transform:translateY(-4px)}
.c-card:hover span{color:var(--gold)}
.c-card .ico{
  display:inline-grid;place-items:center;width:3rem;height:3rem;border-radius:50%;
  border:1px solid var(--gold);color:var(--gold);
  font-style:normal;font-size:.82rem;letter-spacing:.1em;
}
.c-card b{display:block;margin-top:1.1rem;font-weight:400;letter-spacing:.3em;font-size:1rem}
.c-card span{display:block;margin-top:.5rem;color:var(--ink-dim);font-size:.84rem;word-break:break-all}

/* ---------- 页脚 ---------- */
.footer{border-top:1px solid var(--line);padding:4rem 1.6rem 3rem;text-align:center}
.f-brand{letter-spacing:.5em;font-size:1.3rem}
.f-brand i{color:var(--gold);font-style:normal}
.f-sub{margin-top:.9rem;color:var(--ink-dim);font-size:.84rem;letter-spacing:.24em}
.f-copy{margin-top:2rem;color:rgba(179,165,140,.45);font-family:var(--en);font-size:.68rem;letter-spacing:.3em}

/* ---------- 灯箱 ---------- */
.lightbox{
  position:fixed;inset:0;z-index:90;display:none;
  align-items:center;justify-content:center;
  background:rgba(10,8,6,.94);backdrop-filter:blur(6px);
}
.lightbox.open{display:flex}
.lb-stage{max-width:min(92vw,880px);max-height:88vh;display:flex;flex-direction:column;align-items:center;gap:1rem}
.lb-stage img{max-height:76vh;max-width:92vw;object-fit:contain;border:1px solid var(--line)}
.lb-stage figcaption{color:var(--ink-dim);letter-spacing:.34em;font-size:.86rem;text-align:center}
.lb-close{
  position:absolute;top:1.1rem;right:1.4rem;z-index:2;
  background:none;border:none;color:var(--ink);font-size:2.2rem;font-weight:200;cursor:pointer;
}
.lb-arrow{
  position:absolute;top:50%;transform:translateY(-50%);
  background:none;border:1px solid var(--line);border-radius:50%;
  width:3rem;height:3rem;color:var(--ink);font-size:1.5rem;line-height:1;cursor:pointer;
  display:grid;place-items:center;transition:.35s;font-family:var(--en);
}
.lb-arrow:hover{border-color:var(--gold);color:var(--gold)}
.lb-prev{left:1.2rem}.lb-next{right:1.2rem}

/* ---------- 移动端 ---------- */
@media (max-width:900px){
  .hero{grid-template-columns:1fr;padding-top:6.4rem;gap:2.6rem}
  .hero-figure{height:auto;aspect-ratio:4/5}
  .nav-toggle{display:block}
  .nav-links{
    position:fixed;inset:0;background:rgba(20,16,13,.97);
    flex-direction:column;align-items:center;justify-content:center;gap:2.4rem;
    font-size:1.1rem;opacity:0;pointer-events:none;transition:opacity .4s;
  }
  .nav-links.open{opacity:1;pointer-events:auto}
  body.menu-open .nav-toggle span:nth-child(1){transform:translateY(6px) rotate(45deg)}
  body.menu-open .nav-toggle span:nth-child(2){opacity:0}
  body.menu-open .nav-toggle span:nth-child(3){transform:translateY(-6px) rotate(-45deg)}
  .grid{grid-template-columns:repeat(auto-fill,minmax(160px,1fr));gap:.8rem}
  .card-name{font-size:.9rem;letter-spacing:.2em}
  .lb-arrow{width:2.4rem;height:2.4rem}
  .lb-prev{left:.5rem}.lb-next{right:.5rem}
  .scroll-hint{display:none}
}