/* ============================================
   Procreate 厚涂教学网 · Dark Studio Theme
   ============================================ */
:root{
  --bg:#0a0a0a;
  --bg-2:#141414;
  --bg-3:#1c1c1c;
  --line:#2a2a2a;
  --text:#ece8e1;
  --text-mute:#8a847a;
  --accent:#c9a368;      /* 油画赭石 */
  --accent-2:#a87b4a;
  --maxw:1240px;
  --serif:'Cormorant Garamond','Noto Serif SC',serif;
  --sans:'Inter','PingFang SC','Microsoft YaHei',sans-serif;
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  background:var(--bg);
  color:var(--text);
  font-family:var(--sans);
  font-size:15px;
  line-height:1.7;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none;transition:color .25s ease}
a:hover{color:var(--accent)}

/* ---------- NAV ---------- */
.nav{
  position:fixed;top:0;left:0;right:0;z-index:100;
  display:flex;align-items:center;justify-content:space-between;
  padding:22px 48px;
  background:rgba(10,10,10,.72);
  backdrop-filter:blur(14px);
  border-bottom:1px solid var(--line);
}
.nav .brand{
  font-family:var(--serif);
  font-size:22px;
  letter-spacing:.18em;
  font-weight:500;
  text-transform:uppercase;
}
.nav .brand span{color:var(--accent)}
.nav .brand a{color:inherit;text-decoration:none}
.nav .brand img{height:40px;width:auto;display:block}
.nav ul{display:flex;gap:42px;list-style:none}
.nav ul a{
  font-size:13px;
  letter-spacing:.18em;
  text-transform:uppercase;
  color:var(--text-mute);
  position:relative;
  padding:6px 0;
}
.nav ul a.active,.nav ul a:hover,.nav ul .current-menu-item>a,.nav ul .current_page_item>a{color:var(--text)}
.nav ul a.active::after,.nav ul .current-menu-item>a::after,.nav ul .current_page_item>a::after{
  content:'';position:absolute;left:0;right:0;bottom:-2px;
  height:1px;background:var(--accent);
}
@media(max-width:768px){
  .nav{padding:16px 20px;flex-wrap:wrap;gap:12px}
  .nav ul{gap:20px;width:100%;justify-content:space-between}
  .nav ul a{font-size:11px;letter-spacing:.12em}
}

/* ---------- HERO (simple static image) ---------- */
.hero-simple{
  position:relative;
  height:100vh;min-height:640px;
  background:#0a0a0a;
  overflow:hidden;
}
/* background image pinned to right, blurred fade on its left edge */
.hero-img{
  position:absolute;
  top:0;right:0;
  width:62%;height:100%;
  background-size:cover;
  background-position:center;
  -webkit-mask-image:linear-gradient(90deg,transparent 0%,#000 28%,#000 100%);
          mask-image:linear-gradient(90deg,transparent 0%,#000 28%,#000 100%);
}
.hero-simple::before{
  content:'';position:absolute;
  top:0;bottom:0;left:36%;width:26%;z-index:1;
  background:linear-gradient(90deg,#0a0a0a 0%,rgba(10,10,10,.55) 50%,transparent 100%);
  pointer-events:none;
  filter:blur(10px);
}
.hero-simple::after{
  content:'';position:absolute;inset:0;z-index:1;pointer-events:none;
  background:linear-gradient(180deg,transparent 70%,rgba(10,10,10,.85) 100%);
}
.hero-overlay{
  position:absolute;inset:0;z-index:2;
  display:flex;align-items:center;
  padding:0 48px;
  pointer-events:none;
}
.hero-overlay .hero-inner{
  pointer-events:auto;
  max-width:var(--maxw);margin:0 auto;
  width:100%;
}
.hero-overlay .text-col{
  max-width:480px;
}
.hero-simple .eyebrow{
  font-size:12px;
  letter-spacing:.4em;
  text-transform:uppercase;
  color:var(--accent);
  margin-bottom:28px;
}
.hero-simple h1{
  font-family:var(--serif);
  font-size:clamp(40px,6.2vw,84px);
  line-height:1.05;
  font-weight:400;
  letter-spacing:-.01em;
}
.hero-simple h1 em{
  font-style:italic;
  color:var(--accent);
}
.hero-simple p.lead{
  margin-top:32px;
  max-width:560px;
  color:var(--text-mute);
  font-size:16px;
}
/* (entrance animations removed for a calmer, more standard look) */
.hero-overlay .scrub-hint{
  position:absolute;
  bottom:48px;left:48px;
  font-size:11px;letter-spacing:.3em;text-transform:uppercase;
  color:var(--text-mute);
  display:flex;align-items:center;gap:14px;
  pointer-events:none;
}
.hero-overlay .scrub-hint::before{
  content:'';width:36px;height:1px;background:var(--accent);
}
@media(max-width:900px){
  .hero-img{
    width:100%;
    -webkit-mask-image:linear-gradient(180deg,transparent 0%,#000 45%);
            mask-image:linear-gradient(180deg,transparent 0%,#000 45%);
  }
  .hero-simple::before{display:none}
  .hero-overlay{padding:0 24px;align-items:flex-end}
  .hero-overlay .hero-inner{padding-bottom:80px}
  .hero-overlay .scrub-hint{left:24px;bottom:24px}
}

/* legacy hero rules kept for backward compatibility (unused) */
.hero{
  position:relative;
  min-height:100vh;
  display:flex;align-items:center;
  padding:120px 48px 80px;
  overflow:hidden;
}
.hero-bg{
  position:absolute;inset:0;z-index:0;
  background:#000;
}
.hero-bg img{
  width:100%;height:100%;object-fit:cover;
  object-position:center 20%;
  opacity:.55;
  filter:contrast(1.05) saturate(.9);
}
.hero-bg::after{
  content:'';position:absolute;inset:0;
  background:linear-gradient(90deg,rgba(10,10,10,.92) 0%,rgba(10,10,10,.55) 45%,rgba(10,10,10,.2) 100%),
             linear-gradient(180deg,rgba(10,10,10,.6) 0%,transparent 30%,rgba(10,10,10,.85) 100%);
}
.hero-inner{
  position:relative;z-index:2;
  max-width:var(--maxw);margin:0 auto;width:100%;
}
.hero .eyebrow{
  font-size:12px;letter-spacing:.4em;text-transform:uppercase;
  color:var(--accent);margin-bottom:28px;
}
.hero h1{
  font-family:var(--serif);
  font-size:clamp(40px,6.2vw,84px);
  line-height:1.05;
  font-weight:400;
  letter-spacing:-.01em;
  max-width:880px;
}
.hero h1 em{font-style:italic;color:var(--accent)}
.hero p.lead{
  margin-top:32px;
  max-width:560px;
  color:var(--text-mute);
  font-size:16px;
}
.hero-cta{display:flex;gap:18px;margin-top:48px;flex-wrap:wrap}
.btn{
  display:inline-flex;align-items:center;gap:10px;
  padding:14px 28px;
  border:1px solid var(--line);
  font-size:12px;letter-spacing:.22em;text-transform:uppercase;
  color:var(--text);
  transition:all .3s ease;
}
.btn:hover{border-color:var(--accent);color:var(--accent)}
.btn-primary{background:var(--accent);color:#111;border-color:var(--accent)}
.btn-primary:hover{background:transparent;color:var(--accent)}

.hero-meta{
  position:absolute;bottom:40px;left:48px;right:48px;
  z-index:2;
  display:flex;justify-content:space-between;align-items:flex-end;
  font-size:11px;letter-spacing:.25em;text-transform:uppercase;
  color:var(--text-mute);
}
.hero-meta .scroll{display:flex;align-items:center;gap:12px}
.hero-meta .scroll::before{content:'';width:40px;height:1px;background:var(--text-mute)}
@media(max-width:768px){
  .hero{padding:120px 24px 60px}
  .hero-meta{left:24px;right:24px;font-size:10px}
}

/* ---------- SECTION ---------- */
section{padding:120px 40px;position:relative}
.section-head{max-width:var(--maxw);margin:0 auto 64px}
.section-head .num{
  font-family:var(--serif);font-style:italic;
  color:var(--accent);font-size:14px;letter-spacing:.2em;
  margin-bottom:18px;
}
.section-head h2{
  font-family:var(--serif);
  font-size:clamp(32px,4.2vw,56px);
  font-weight:400;line-height:1.1;
  max-width:760px;
}
.section-head h2 em{font-style:italic;color:var(--accent)}
.section-head p{
  max-width:560px;margin-top:20px;
  color:var(--text-mute);font-size:15px;
}
.section-divider{
  max-width:var(--maxw);margin:0 auto;
  height:1px;background:var(--line);
}
@media(max-width:768px){section{padding:80px 24px}}

/* ---------- COURSE GRID ---------- */
.courses{
  max-width:var(--maxw);margin:0 auto;
  display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:24px;
}
.course{
  position:relative;cursor:pointer;
  background:var(--bg-2);
  border:1px solid var(--line);
  overflow:hidden;
}
.course .thumb{
  aspect-ratio:3/4;
  background:#000;overflow:hidden;position:relative;
}
.course .thumb img{
  width:100%;height:100%;object-fit:cover;
  filter:contrast(1.03);
}
.course .thumb::after{
  content:'';position:absolute;inset:0;
  background:linear-gradient(180deg,transparent 55%,rgba(10,10,10,.95));
}
.course .body{
  position:absolute;bottom:0;left:0;right:0;
  padding:18px 18px 20px;z-index:2;
}
.course .tag{
  font-size:10px;letter-spacing:.3em;text-transform:uppercase;
  color:var(--accent);margin-bottom:10px;display:block;
}
.course h3{
  font-family:var(--serif);font-size:19px;font-weight:500;
  line-height:1.2;margin-bottom:8px;
}
.course .meta{
  font-size:11px;letter-spacing:.15em;color:var(--text-mute);
  text-transform:uppercase;
  display:flex;justify-content:space-between;margin-top:14px;
  border-top:1px solid rgba(255,255,255,.08);padding-top:12px;
}
@media(max-width:900px){.courses{grid-template-columns:1fr;gap:20px}}

/* ---------- TUTORIAL: GEOMETRY GRID ---------- */
.geo-grid{
  max-width:var(--maxw);margin:0 auto;
  display:grid;grid-template-columns:repeat(2,1fr);gap:24px;
}
.geo-grid figure{
  background:#f4ede0;
  padding:24px;
  border:1px solid var(--line);
  position:relative;
}
.geo-grid img{width:100%;height:auto;filter:contrast(1.03)}
.geo-grid figcaption{
  position:absolute;top:18px;right:24px;
  font-family:var(--serif);font-style:italic;
  color:#2a2622;font-size:14px;letter-spacing:.05em;
}
@media(max-width:768px){.geo-grid{grid-template-columns:1fr}}

/* ---------- TUTORIAL: PHASES ---------- */
.phases{max-width:var(--maxw);margin:0 auto}
.phase{
  display:grid;grid-template-columns:1fr 1fr;gap:64px;
  align-items:center;
  padding:80px 0;
  border-top:1px solid var(--line);
}
.phase:first-child{border-top:none}
.phase.reverse .phase-img{order:2}
.phase-img{
  position:relative;
  background:#000;
  overflow:hidden;
}
.phase-img img{width:100%;height:auto;display:block;object-fit:contain;object-position:center;background:#000}
.phase-img .badge{
  position:absolute;top:18px;left:18px;
  background:rgba(10,10,10,.85);
  border:1px solid var(--accent);
  color:var(--accent);
  font-size:11px;letter-spacing:.25em;text-transform:uppercase;
  padding:8px 14px;
}
.phase-text .step{
  font-family:var(--serif);font-style:italic;
  color:var(--accent);font-size:14px;letter-spacing:.2em;
  margin-bottom:18px;
}
.phase-text h3{
  font-family:var(--serif);
  font-size:clamp(28px,3.4vw,44px);
  font-weight:400;line-height:1.15;margin-bottom:24px;
}
.phase-text p{color:var(--text-mute);margin-bottom:16px;font-size:15px}
.phase-text ul{list-style:none;margin-top:24px}
.phase-text ul li{
  padding:10px 0 10px 22px;
  position:relative;
  border-bottom:1px solid var(--line);
  font-size:14px;color:var(--text);
}
.phase-text ul li::before{
  content:'';position:absolute;left:0;top:18px;
  width:8px;height:1px;background:var(--accent);
}
@media(max-width:900px){
  .phase{grid-template-columns:1fr;gap:32px;padding:50px 0}
  .phase.reverse .phase-img{order:0}
}

/* ---------- VIDEO ---------- */
.video-wrap{
  max-width:var(--maxw);margin:0 auto;
  border:1px solid var(--line);
  background:#000;
}
.video-wrap video{width:100%;display:block}

/* ---------- ABOUT ---------- */
.about{
  max-width:var(--maxw);margin:0 auto;
  display:grid;grid-template-columns:280px 1fr;gap:64px;align-items:center;
}
.about .avatar{
  width:240px;height:240px;
  background:linear-gradient(135deg,#2a2218,#0a0a0a);
  border:1px solid var(--line);
  display:flex;align-items:center;justify-content:center;
  font-family:var(--serif);font-size:72px;color:var(--accent);
  font-style:italic;
  border-radius:50%;
  overflow:hidden;
  position:relative;
}
.about .avatar::after{
  content:'';position:absolute;inset:0;
  background:radial-gradient(circle at 30% 30%,rgba(201,163,104,.18),transparent 60%);
}
.about .avatar img{
  width:100%;height:100%;object-fit:cover;position:relative;z-index:1;
}
.about-text h3{
  font-family:var(--serif);font-size:36px;font-weight:400;margin-bottom:20px;
}
.about-text p{color:var(--text-mute);margin-bottom:14px;max-width:580px}
.about-text .sig{
  margin-top:28px;
  font-family:var(--serif);font-style:italic;
  color:var(--accent);font-size:18px;
}
@media(max-width:768px){
  .about{grid-template-columns:1fr;text-align:center}
  .about .avatar{margin:0 auto;width:180px;height:180px;font-size:54px}
  .about-text p{margin-left:auto;margin-right:auto}
}

/* ---------- RESOURCES ---------- */
.res-grid{
  max-width:var(--maxw);margin:0 auto;
  display:grid;grid-template-columns:repeat(3,1fr);gap:1px;
  background:var(--line);
  border:1px solid var(--line);
}
.res-item{
  background:var(--bg);
  padding:36px 32px;
}
.res-item .ic{
  font-family:var(--serif);font-style:italic;
  color:var(--accent);font-size:14px;letter-spacing:.2em;margin-bottom:18px;
}
.res-item h4{font-family:var(--serif);font-size:22px;font-weight:500;margin-bottom:10px}
.res-item p{color:var(--text-mute);font-size:13px;margin-bottom:18px}
.res-item .dl{
  font-size:11px;letter-spacing:.25em;text-transform:uppercase;color:var(--accent);
}
@media(max-width:768px){.res-grid{grid-template-columns:1fr}}

/* ---------- FOOTER ---------- */
footer{
  border-top:1px solid var(--line);
  padding:60px 48px 40px;
  background:#060606;
}
.foot-inner{
  max-width:var(--maxw);margin:0 auto;
  display:flex;justify-content:space-between;align-items:center;
  flex-wrap:wrap;gap:20px;
}
.foot-inner .brand-f{
  font-family:var(--serif);font-size:20px;letter-spacing:.18em;
  text-transform:uppercase;
}
.foot-inner small{color:var(--text-mute);font-size:12px;letter-spacing:.1em}

/* ---------- FACIAL FEATURES PAGE ---------- */
.feature-hero{
  padding:160px 48px 80px;
  text-align:center;
  border-bottom:1px solid var(--line);
}
.feature-hero .eyebrow{
  font-size:12px;letter-spacing:.4em;text-transform:uppercase;
  color:var(--accent);margin-bottom:24px;
}
.feature-hero h1{
  font-family:var(--serif);font-size:clamp(40px,5.5vw,72px);
  font-weight:400;line-height:1.05;
}
.feature-hero h1 em{font-style:italic;color:var(--accent)}
.feature-hero p{
  margin:28px auto 0;max-width:600px;color:var(--text-mute);
}

.crop-grid{
  max-width:var(--maxw);margin:0 auto;
  display:grid;grid-template-columns:repeat(2,1fr);gap:48px;
}
.crop-card{
  background:var(--bg-2);border:1px solid var(--line);
  padding:24px;
}
.crop-window{
  aspect-ratio:1/1;
  background:#000;overflow:hidden;position:relative;
  margin-bottom:20px;
}
.crop-window img{
  position:absolute;
  display:block;
  width:auto;
  height:auto !important;
  max-width:none !important;
  transform-origin:top left;
}
.crop-window.crop-eye img{width:340% !important;left:-145%;top:-90%}
.crop-window.crop-nose img{width:380% !important;left:-165%;top:-125%}
.crop-window.crop-mouth img{width:340% !important;left:-145%;top:-170%}
.crop-window.crop-hair img{width:280% !important;left:-90%;top:-40%}
.crop-card h3{
  font-family:var(--serif);font-size:24px;font-weight:500;margin-bottom:8px;
}
.crop-card .step-tag{
  font-size:11px;letter-spacing:.22em;text-transform:uppercase;
  color:var(--accent);margin-bottom:12px;display:block;
}
.crop-card p{color:var(--text-mute);font-size:14px}
.crop-note{
  max-width:900px;margin:80px auto 0;text-align:center;
  color:var(--text-mute);font-size:14px;
}
.crop-note a{
  color:var(--accent);border-bottom:1px solid var(--accent);
}
@media(max-width:768px){.crop-grid{grid-template-columns:1fr;gap:24px}}

/* ---------- UTIL ---------- */
.split-title{
  display:flex;align-items:baseline;justify-content:space-between;
  max-width:var(--maxw);margin:0 auto 48px;flex-wrap:wrap;gap:20px;
}
.split-title h2{
  font-family:var(--serif);font-size:clamp(28px,3.6vw,46px);
  font-weight:400;
}
.split-title h2 em{font-style:italic;color:var(--accent)}
.split-title .meta{
  font-size:11px;letter-spacing:.25em;text-transform:uppercase;color:var(--text-mute);
}
.foundation-eyebrow{
  font-family:var(--serif);font-style:italic;color:var(--accent);
  font-size:14px;letter-spacing:.2em;margin-bottom:14px;
}
.foundation-note{
  max-width:720px;margin:48px auto 0;color:var(--text-mute);font-size:14px;
}
.foundation-note strong{color:var(--text)}

/* ---------- HERO PRELOADER ---------- */
#heroLoader{
  position:fixed;inset:0;z-index:9999;
  background:#0a0a0a;
  display:flex;align-items:center;justify-content:center;
  transition:opacity .6s ease, visibility .6s ease;
}
#heroLoader.done{opacity:0;visibility:hidden;pointer-events:none}
.loader-inner{width:min(420px,80vw);text-align:center}
.loader-mark{
  font-family:var(--serif);font-size:32px;letter-spacing:.18em;
  text-transform:uppercase;color:var(--text);margin-bottom:36px;
}
.loader-mark span{color:var(--accent)}
.loader-text{
  font-size:11px;letter-spacing:.3em;text-transform:uppercase;
  color:var(--text-mute);margin-bottom:20px;
}
.loader-bar{
  width:100%;height:1px;background:var(--line);
  position:relative;overflow:hidden;
}
.loader-fill{
  position:absolute;left:0;top:0;height:100%;
  width:0%;background:var(--accent);
  transition:width .25s ease;
}
.loader-pct{
  margin-top:18px;
  font-family:var(--serif);font-style:italic;font-size:14px;
  color:var(--accent);letter-spacing:.15em;
}

@media(max-width:768px){
  section{
    padding:72px 20px;
  }
  .section-head{
    margin-bottom:42px;
  }
  .section-head .num{
    font-size:12px;
    letter-spacing:.16em;
  }
  .section-head h2{
    font-size:clamp(30px,10vw,42px);
  }
  .section-head p{
    font-size:14px;
  }
  .hero-simple{
    height:680px !important;
    min-height:680px !important;
  }
  .hero-img{
    width:100% !important;
    height:62%;
    opacity:.85;
    top:0;
    right:0;
  }
  .hero-overlay{
    align-items:flex-end;
    padding:0 20px 56px;
  }
  .hero-overlay .hero-inner{
    padding-bottom:0;
  }
  .hero-overlay .text-col{
    max-width:100%;
  }
  .hero-simple .eyebrow{
    font-size:11px;
    letter-spacing:.22em;
    margin-bottom:18px;
  }
  .hero-simple h1{
    font-size:clamp(38px,11vw,50px);
    line-height:1.08;
    max-width:100%;
  }
  .hero-simple p.lead{
    margin-top:22px;
    font-size:14px;
    max-width:100%;
  }
  .hero-cta{
    width:100%;
    margin-top:30px;
    gap:12px;
  }
  .hero-cta .btn{
    width:100%;
    justify-content:center;
    padding:13px 18px;
  }
  .courses{
    grid-template-columns:1fr !important;
    gap:20px;
  }
  .course .thumb{
    aspect-ratio:4/5;
  }
  .course .body{
    padding:18px 16px 20px;
  }
  .course h3{
    font-size:22px;
  }
  .course .meta{
    gap:12px;
    flex-wrap:wrap;
  }
  .about{
    grid-template-columns:1fr !important;
    gap:22px !important;
    text-align:center;
  }
  .about .avatar{
    width:138px !important;
    height:138px !important;
    margin:0 auto;
    font-size:46px;
  }
  .about-text h3{
    font-size:26px;
    margin-bottom:14px;
  }
  .about-text p{
    max-width:100%;
    margin-left:auto;
    margin-right:auto;
    font-size:14px;
    margin-bottom:10px;
  }
  .about-text .sig{
    margin-top:18px;
  }
  .res-grid{
    grid-template-columns:1fr !important;
    gap:1px !important;
  }
  .res-item{
    padding:26px 20px !important;
  }
  .res-item .ic{
    font-size:12px;
    margin-bottom:14px;
  }
  .res-item h4{
    font-size:22px;
  }
  .res-item p{
    font-size:14px;
    margin-bottom:18px;
  }
  .feature-hero{
    padding:112px 20px 58px !important;
  }
  .feature-hero .eyebrow{
    font-size:11px;
    letter-spacing:.22em;
    margin-bottom:16px;
  }
  .feature-hero h1{
    font-size:clamp(36px,11vw,48px);
    line-height:1.08;
  }
  .feature-hero p{
    max-width:100%;
    margin-top:20px;
    font-size:14px;
  }
  .crop-grid{
    grid-template-columns:1fr !important;
    gap:24px !important;
  }
  .crop-card{
    padding:18px !important;
  }
  .crop-window{
    margin-bottom:16px;
  }
  .crop-card h3{
    font-size:22px;
  }
  .crop-note{
    margin-top:42px !important;
    padding:0 4px;
    font-size:14px;
  }
  .split-title{
    display:block;
    margin-bottom:32px !important;
  }
  .split-title .meta{
    margin-top:16px;
  }
  .foundation-eyebrow{
    font-size:12px;
    letter-spacing:.16em;
    margin-bottom:10px;
  }
  .geo-grid{
    grid-template-columns:1fr !important;
    gap:20px !important;
  }
  .geo-grid figure{
    padding:16px !important;
  }
  .geo-grid figcaption{
    top:12px;
    right:16px;
    font-size:12px;
  }
  .foundation-note{
    margin-top:32px !important;
    max-width:100%;
    font-size:14px;
  }
  .phase{
    grid-template-columns:1fr !important;
    gap:28px !important;
    padding:44px 0 !important;
  }
  .phase.reverse .phase-img{
    order:0 !important;
  }
  .phase-text .step{
    font-size:12px;
    letter-spacing:.16em;
    margin-bottom:12px;
  }
  .phase-text h3{
    font-size:clamp(28px,9vw,38px);
    margin-bottom:18px;
  }
  .phase-text ul{
    margin-top:18px;
  }
  .phase-text ul li{
    font-size:13px;
  }
}