/* ============================================================
   STUDIO — 模板展示页 · 低调奢华 / 简约大气
   纯原生，无外部依赖；效果语汇取自
   Effect.Labs / freefrontend / Transitions.dev / Animate.css
   ============================================================ */

:root{
  --bg:#0C0C0E;
  --bg-2:#131317;
  --ink:#EDE9E0;
  --ink-2:#A8A298;
  --ink-soft:#6E6A62;
  --line:rgba(237,233,224,.12);
  --line-strong:rgba(237,233,224,.22);
  --accent:#C9A24A;        /* 香槟金 */
  --accent-2:#E0BC6E;
  --ease:cubic-bezier(.22,.61,.36,1);
  --gut:clamp(20px,5vw,72px);

  --font-sans:"PingFang SC","Microsoft YaHei",-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;
  --font-serif:"Songti SC","STSong","SimSun",Georgia,"Times New Roman",serif;
  --font-en:Georgia,"Times New Roman","Songti SC",serif;
}

*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{
  background:var(--bg);
  color:var(--ink);
  font-family:var(--font-sans);
  -webkit-font-smoothing:antialiased;
  line-height:1.6;
  overflow-x:hidden;
  cursor:none;
}
@media (hover:none){ body{cursor:auto} }

.display{font-family:var(--font-en);font-weight:400;letter-spacing:.01em;line-height:1.04}

img{display:block;max-width:100%}

/* ---------- 噪点底纹（low-key 质感） ---------- */
.hero__grain{
  position:fixed;inset:0;pointer-events:none;z-index:1;opacity:.05;
  background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='160' height='160'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.9' numOctaves='2'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
}

/* ---------- 导航 ---------- */
.nav{
  position:fixed;top:0;left:0;right:0;z-index:50;
  display:flex;align-items:center;justify-content:space-between;
  padding:22px var(--gut);
  mix-blend-mode:difference;     /* 自动反白，跨明度背景都清晰 */
  color:#fff;
}
.nav__brand{font-family:var(--font-serif);font-size:20px;letter-spacing:.04em;color:#fff;text-decoration:none}
.nav__brand span{font-size:.5em;vertical-align:super}
.nav__links{display:flex;gap:clamp(18px,3vw,40px)}
.nav__links a{color:#fff;text-decoration:none;font-size:13px;letter-spacing:.16em;text-transform:uppercase;opacity:.85;transition:opacity .3s}
.nav__links a:hover{opacity:1}
.nav__count{font-size:12px;letter-spacing:.18em;opacity:.7}

/* ---------- HERO ---------- */
.hero{
  position:relative;min-height:100vh;
  display:flex;flex-direction:column;justify-content:center;
  padding:0 var(--gut);
  z-index:2;
}
.hero__eyebrow{font-size:12px;letter-spacing:.4em;color:var(--accent);margin-bottom:28px;opacity:0;animation:fadeUp 1s var(--ease) .2s forwards}
.hero__title{font-size:clamp(54px,13vw,180px)}
.hero__title .line{display:block;overflow:hidden}
.hero__title .line span{
  display:block;transform:translateY(110%);
  animation:lineUp 1.1s var(--ease) forwards;
}
.hero__title .line:nth-child(2) span{animation-delay:.16s;color:var(--accent-2)}
.hero__sub{
  margin-top:34px;max-width:46ch;color:var(--ink-2);font-size:clamp(14px,1.6vw,18px);
  opacity:0;animation:fadeUp 1s var(--ease) .7s forwards;
}
.hero__scroll{
  position:absolute;bottom:34px;left:var(--gut);
  font-size:12px;letter-spacing:.24em;color:var(--ink-soft);
  display:flex;align-items:center;gap:12px;opacity:0;animation:fadeUp 1s var(--ease) 1s forwards;
}
.hero__scroll i{display:block;width:46px;height:1px;background:var(--ink-soft);position:relative;overflow:hidden}
.hero__scroll i::after{content:"";position:absolute;inset:0;background:var(--accent);transform:translateX(-100%);animation:slideX 2.4s var(--ease) infinite}

@keyframes lineUp{to{transform:translateY(0)}}
@keyframes fadeUp{from{opacity:0;transform:translateY(18px)}to{opacity:1;transform:none}}
@keyframes slideX{50%{transform:translateX(0)}100%{transform:translateX(100%)}}

/* ---------- GROUP / 区块 ---------- */
.group{padding:clamp(70px,10vw,150px) var(--gut);position:relative;z-index:2}
.group__head{display:flex;gap:clamp(20px,4vw,56px);align-items:flex-end;margin-bottom:clamp(34px,5vw,64px);border-bottom:1px solid var(--line);padding-bottom:28px}
.group__no{font-family:var(--font-en);font-size:clamp(28px,5vw,56px);color:var(--accent);line-height:1}
.group__title h2{font-size:clamp(30px,5.5vw,64px)}
.group__title h2 em{font-style:italic;color:var(--accent-2)}
.group__title p{margin-top:12px;max-width:54ch;color:var(--ink-2);font-size:15px}

/* ---------- GRID / 卡片 ---------- */
.grid{display:grid;gap:clamp(16px,2vw,28px)}
.grid--4{grid-template-columns:repeat(4,1fr)}
.grid--2{grid-template-columns:repeat(2,1fr)}
@media (max-width:1100px){.grid--4{grid-template-columns:repeat(2,1fr)}}
@media (max-width:720px){.grid--4,.grid--2{grid-template-columns:1fr}}

.card{
  position:relative;display:block;text-decoration:none;color:var(--ink);
  aspect-ratio:3/4;overflow:hidden;border-radius:2px;
  background:var(--bg-2);
  border:1px solid var(--line);
  transition:transform .6s var(--ease),border-color .6s var(--ease);
  /* 入场（Animate.css 风格） */
  opacity:0;transform:translateY(40px);
}
.card.is-in{opacity:1;transform:none}
.card:hover{transform:translateY(-6px);border-color:var(--line-strong)}
@media (prefers-reduced-motion:reduce){.card{opacity:1;transform:none;transition:none}}

.card__media{position:absolute;inset:0;overflow:hidden;background:var(--bg-2)}
.card__media::before{
  content:"";position:absolute;inset:-8%;background-image:var(--lqip,none);
  background-size:cover;background-position:center;filter:blur(18px);transform:scale(1.12);
  z-index:0;
}
.card__media img{
  position:absolute;inset:0;width:100%;height:100%;object-fit:cover;z-index:1;
  opacity:0;
  transition:opacity .6s var(--ease),transform 1s var(--ease),filter .6s var(--ease);
}
.card__media img.is-loaded{opacity:1}
.card:hover .card__media img{transform:scale(1.06);filter:saturate(1.04)}
.card__scrim{
  position:absolute;inset:0;z-index:2;
  background:
    linear-gradient(to top,rgba(8,8,10,.96) 0%,rgba(8,8,10,.88) 26%,rgba(8,8,10,.5) 48%,rgba(8,8,10,.1) 70%,rgba(8,8,10,0) 84%),
    linear-gradient(to bottom,rgba(8,8,10,.68) 0%,rgba(8,8,10,.24) 16%,rgba(8,8,10,0) 36%);
  transition:opacity .6s var(--ease);
}
.card:hover .card__scrim{opacity:.92}

.card__head{position:absolute;left:0;right:0;top:0;padding:18px 20px;display:flex;justify-content:space-between;align-items:flex-start;z-index:4}
.card__tag{font-size:11px;letter-spacing:.2em;text-transform:uppercase;color:rgba(255,255,255,.82);backdrop-filter:blur(2px)}
.card__name{margin:0 0 8px;font-family:var(--font-serif);font-size:clamp(19px,1.6vw,24px);color:#fff;font-weight:600;line-height:1.2;text-shadow:0 1px 18px rgba(0,0,0,.55)}

.card__body{position:absolute;left:0;right:0;bottom:0;padding:20px;z-index:4;transition:transform .6s var(--ease)}
.card:hover .card__body{transform:translateY(0)}
.card__style{font-size:13px;color:rgba(255,255,255,.92);margin-bottom:8px}
.card__desc{font-size:12.5px;line-height:1.55;color:rgba(255,255,255,.66);max-height:0;opacity:0;overflow:hidden;transition:max-height .6s var(--ease),opacity .5s var(--ease)}
.card:hover .card__desc{max-height:120px;opacity:1}
.card__foot{display:flex;align-items:center;justify-content:space-between;margin-top:14px}
.card__swatches{display:flex;gap:8px}
.sw{width:18px;height:18px;border-radius:50%;background:var(--s);box-shadow:0 0 0 1px rgba(255,255,255,.25) inset;position:relative}
.sw::after{content:attr(data-k);position:absolute;left:50%;bottom:-16px;transform:translateX(-50%);font-size:9px;letter-spacing:.1em;color:rgba(255,255,255,.6);white-space:nowrap;opacity:0;transition:opacity .3s}
.card:hover .sw::after{opacity:1}
.card__cta{font-size:12px;letter-spacing:.16em;color:var(--accent-2);display:inline-flex;align-items:center;gap:6px}
.card__cta::after{content:"→";transition:transform .4s var(--ease)}
.card:hover .card__cta::after{transform:translateX(5px)}

/* ---------- FOOTER ---------- */
.foot{padding:clamp(80px,12vw,160px) var(--gut) 90px;text-align:center;position:relative;z-index:2;border-top:1px solid var(--line)}
.foot p.display{font-size:clamp(28px,6vw,72px)}
.foot__meta{margin-top:18px;font-size:12px;letter-spacing:.22em;color:var(--ink-soft)}

/* ---------- 自定义光标（低调奢华） ---------- */
.cursor-dot,.cursor-ring{position:fixed;top:0;left:0;pointer-events:none;z-index:9999;border-radius:50%;mix-blend-mode:difference;opacity:0}
.cursor-dot{width:6px;height:6px;background:#fff;transform:translate(-50%,-50%)}
.cursor-ring{width:38px;height:38px;border:1px solid rgba(255,255,255,.7);transform:translate(-50%,-50%);transition:width .3s var(--ease),height .3s var(--ease),background .3s,border-color .3s}
body.has-cursor .cursor-dot,body.has-cursor .cursor-ring{opacity:1}
.cursor-ring.is-view{width:62px;height:62px;border-color:var(--accent);background:rgba(201,162,74,.12)}
@media (hover:none){.cursor-dot,.cursor-ring{display:none}}
@media (hover:none){body{cursor:auto}}

/* ---------- 页面转场遮罩（Transitions.dev 风格共享元素过渡） ---------- */
.transition-overlay{
  position:fixed;inset:0;z-index:9000;background:var(--accent);
  clip-path:circle(0 at 50% 50%);pointer-events:none;
}
.transition-overlay.is-on{clip-path:circle(150% at var(--ox,50%) var(--oy,50%));transition:clip-path .42s var(--ease)}
.transition-overlay__mark{
  position:absolute;left:50%;top:50%;transform:translate(-50%,-50%);
  font-family:var(--font-serif);color:#0C0C0E;font-size:clamp(22px,4vw,40px);letter-spacing:.1em;opacity:0;
}
.transition-overlay.is-on .transition-overlay__mark{opacity:1;transition:opacity .3s .1s}

/* ---------- 移动端自适应 ---------- */
@media (max-width:820px){
  .nav{padding:16px 18px}
  .nav__links{display:none}
  .nav__count{display:none}
  .hero{padding:0 18px}
  .hero__title{font-size:clamp(46px,14.5vw,96px);line-height:1.12}
  .hero__sub{font-size:14px;margin-top:22px;max-width:none}
  .hero__scroll{left:18px;bottom:22px}
  .group{padding:clamp(48px,12vw,90px) 18px}
  .group__head{flex-direction:column;align-items:flex-start;gap:12px;padding-bottom:20px}
  .group__no{font-size:34px}
  .group__title h2{font-size:clamp(28px,9vw,44px)}
  .group__title p{font-size:14px;margin-top:8px}
  .foot{padding:70px 18px 90px}
  .card__desc{max-height:none;opacity:.85}
  .card__body{transform:none}
  .wb-back{left:12px;bottom:12px;padding:9px 13px;font-size:12px}
  .wb-notice-btn{right:12px;bottom:12px;padding:8px 11px;font-size:10px}
}
@media (max-width:480px){
  .hero__title{font-size:clamp(40px,15vw,72px)}
}