/* ============================================================
   觉心精神分析协会 · v3「深渊书斋」
   墨黑 × 烛光琥珀 × 旧纸米白 · 衬线 · 颗粒 · 竖排
   ============================================================ */

:root{
  --ink:        #0c0a08;   /* 墨黑 */
  --ink-2:      #131009;   /* 深一层 */
  --surface:    #17130d;   /* 浮层 */
  --paper:      #ece3d0;   /* 旧纸 */
  --paper-dim:  #b3a78f;   /* 灰化纸 */
  --muted:      #8b7f6a;   /* 弱 */
  --gold:       #c9a05a;   /* 烛光琥珀 */
  --gold-soft:  rgba(201,160,90,.55);
  --line:       rgba(201,160,90,.16);
  --line-strong:rgba(201,160,90,.32);
  --serif: "Noto Serif SC","Songti SC","STSong","SimSun",serif;
  --latin: "Cormorant Garamond","Noto Serif SC",serif;
  --ease: cubic-bezier(.22,.61,.21,1);
}

*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
html:focus-within{scroll-behavior:smooth}
body{
  background:var(--ink);
  color:var(--paper);
  font-family:var(--serif);
  font-size:16px;
  line-height:1.9;
  letter-spacing:.02em;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
/* 胶片颗粒 */
body::after{
  content:"";position:fixed;inset:-50%;z-index:60;pointer-events:none;
  background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='240' height='240'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='2' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
  opacity:.05;
  animation:grain 9s steps(6) infinite;
}
@keyframes grain{
  0%,100%{transform:translate(0,0)}20%{transform:translate(-4%,3%)}
  40%{transform:translate(3%,-4%)}60%{transform:translate(-3%,-2%)}80%{transform:translate(4%,2%)}
}
@media (prefers-reduced-motion:reduce){body::after{animation:none}}

::selection{background:var(--gold);color:var(--ink)}
img{display:block;max-width:100%}
a{color:inherit;text-decoration:none}
button{font:inherit;color:inherit;background:none;border:0;cursor:pointer}

.skip{position:fixed;top:-100px;left:16px;z-index:200;background:var(--gold);color:var(--ink);padding:8px 16px;transition:top .3s}
.skip:focus{top:12px}

.vertical{writing-mode:vertical-rl;letter-spacing:.35em}

/* ---------- 头部 ---------- */
.header{
  position:fixed;inset:0 0 auto 0;z-index:100;
  display:flex;align-items:center;justify-content:space-between;
  padding:18px clamp(20px,4vw,56px);
  background:linear-gradient(rgba(12,10,8,.82),rgba(12,10,8,.55) 70%,transparent);
  backdrop-filter:blur(10px);-webkit-backdrop-filter:blur(10px);
  border-bottom:1px solid transparent;transition:border-color .4s,background .4s;
}
.header.scrolled{border-bottom-color:var(--line);background:rgba(12,10,8,.9)}
.scroll-progress{position:absolute;left:0;bottom:-1px;width:100%;height:1px}
.scroll-progress span{display:block;height:100%;width:0;background:linear-gradient(90deg,var(--gold-soft),var(--gold))}
.brand{display:flex;align-items:center;gap:12px}
.brand-mark{
  display:grid;place-items:center;width:40px;height:40px;
  border:1px solid var(--line-strong);color:var(--gold);
  font-size:20px;font-weight:900;
}
.brand-word{display:flex;flex-direction:column;line-height:1.3}
.brand-word strong{font-size:17px;letter-spacing:.28em}
.brand-word small{font-size:11px;color:var(--muted);letter-spacing:.22em}
.header nav{display:flex;gap:clamp(18px,3vw,40px);align-items:center}
.header nav a{
  font-size:14px;letter-spacing:.24em;color:var(--paper-dim);
  padding:6px 2px;position:relative;transition:color .3s;
}
.header nav a::after{
  content:"";position:absolute;left:0;bottom:0;width:100%;height:1px;
  background:var(--gold);transform:scaleX(0);transform-origin:right;transition:transform .45s var(--ease);
}
.header nav a:hover{color:var(--paper)}
.header nav a:hover::after{transform:scaleX(1);transform-origin:left}
.header nav a.nav-join{color:var(--gold)}
.menu-toggle{display:none;font-size:13px;letter-spacing:.2em;color:var(--paper)}

/* ---------- 首屏 ---------- */
.hero{position:relative;min-height:100svh;display:flex;flex-direction:column;justify-content:flex-end;overflow:hidden}
.hero-art{position:absolute;inset:0;will-change:transform;transition:transform .6s var(--ease)}
.hero-art img{width:100%;height:100%;object-fit:cover;transform:scale(1.08);animation:kenburns 26s ease-in-out infinite alternate}
@keyframes kenburns{from{transform:scale(1.08) translateY(0)}to{transform:scale(1.16) translateY(-2%)}}
@media (prefers-reduced-motion:reduce){.hero-art img{animation:none}}
.hero-shade{
  position:absolute;inset:0;
  background:
    linear-gradient(180deg,rgba(12,10,8,.45) 0%,rgba(12,10,8,.08) 34%,rgba(12,10,8,.62) 68%,var(--ink) 100%),
    radial-gradient(120% 90% at 24% 78%,rgba(12,10,8,.72),transparent 60%);
}
.hero-side{
  position:absolute;right:clamp(18px,3.4vw,52px);top:50%;transform:translateY(-50%);
  color:var(--gold-soft);font-size:14px;z-index:3;
  border-left:1px solid var(--line);padding-left:14px;
}
.hero-content{position:relative;z-index:3;padding:0 clamp(24px,6vw,96px) clamp(96px,14vh,150px);max-width:980px}
.eyebrow{
  font-family:var(--latin);font-size:12px;letter-spacing:.42em;
  color:var(--gold);text-transform:uppercase;margin-bottom:18px;
}
.school{font-size:13px;letter-spacing:.34em;color:var(--paper-dim);margin-bottom:26px}
.hero h1{
  font-size:clamp(44px,7.6vw,96px);font-weight:900;line-height:1.22;
  letter-spacing:.06em;color:var(--paper);
  text-shadow:0 2px 40px rgba(0,0,0,.55);
}
.title-period{color:var(--gold)}
.hero-copy{
  margin-top:28px;font-size:clamp(15px,1.5vw,17.5px);color:var(--paper-dim);
  max-width:34em;line-height:2.1;
}
.actions{display:flex;gap:26px;align-items:center;margin-top:40px;flex-wrap:wrap}
.button{
  display:inline-flex;align-items:center;gap:10px;
  padding:14px 30px;font-size:14.5px;letter-spacing:.22em;
  border:1px solid var(--line-strong);color:var(--paper);
  transition:all .4s var(--ease);
}
.button.primary{background:var(--gold);border-color:var(--gold);color:var(--ink);font-weight:700}
.button.primary:hover{background:#dab877;transform:translateY(-2px)}
.button.primary span{transition:transform .4s}
.button.primary:hover span{transform:translate(2px,-2px)}
.button.light:hover{border-color:var(--gold);color:var(--gold)}
.text-link{font-size:14px;letter-spacing:.2em;color:var(--paper-dim);border-bottom:1px solid var(--line-strong);padding-bottom:4px;transition:color .3s,border-color .3s}
.text-link:hover{color:var(--gold);border-color:var(--gold)}
.hero-bottom{
  position:relative;z-index:3;
  display:flex;justify-content:space-between;align-items:center;gap:20px;
  padding:18px clamp(24px,6vw,96px);border-top:1px solid var(--line);
  font-size:12px;letter-spacing:.24em;color:var(--muted);
}
.hero-bottom a{color:var(--paper-dim);transition:color .3s}
.hero-bottom a:hover{color:var(--gold)}
.hero-bottom button{font-size:12px;letter-spacing:.24em;color:var(--muted);transition:color .3s}
.hero-bottom button:hover{color:var(--paper)}

/* ---------- 通用 section ---------- */
.section{padding:clamp(90px,13vh,150px) clamp(24px,6vw,96px);position:relative}
.section-label{
  display:flex;justify-content:space-between;align-items:baseline;gap:16px;
  border-top:1px solid var(--line-strong);padding-top:16px;margin-bottom:clamp(44px,7vh,72px);
  font-size:12px;letter-spacing:.34em;color:var(--gold);
}
.section-label span:last-child{font-family:var(--latin);color:var(--muted);letter-spacing:.3em;font-size:11px}
h2{font-size:clamp(30px,4.4vw,54px);font-weight:900;line-height:1.4;letter-spacing:.05em}
.lead{font-size:clamp(17px,1.8vw,20px);color:var(--paper);font-weight:600}

/* ---------- 壹 / 定位 ---------- */
.intro-grid{display:grid;grid-template-columns:1.1fr 1fr;gap:clamp(36px,6vw,96px);align-items:start}
.intro-copy p+p{margin-top:18px}
.intro-copy p:not(.lead){color:var(--paper-dim)}
.intro-note{
  border-left:2px solid var(--gold);padding-left:18px;margin-top:26px;
  color:var(--paper);font-size:15px;
}
.principles{display:grid;grid-template-columns:repeat(3,1fr);gap:1px;background:var(--line);margin-top:clamp(56px,9vh,90px);border:1px solid var(--line)}
.principles article{
  background:var(--ink);padding:clamp(28px,3.4vw,44px);
  transition:background .5s var(--ease);
}
.principles article:hover{background:var(--surface)}
.principles span{
  font-size:15px;color:var(--gold);letter-spacing:.3em;
  display:block;margin-bottom:20px;
}
.principles h3{font-size:22px;letter-spacing:.14em;margin-bottom:14px}
.principles p{font-size:14.5px;color:var(--paper-dim);line-height:1.95}

/* ---------- 引文幕间 ---------- */
.interlude{
  padding:clamp(80px,12vh,140px) clamp(24px,6vw,96px);
  text-align:center;border-top:1px solid var(--line);border-bottom:1px solid var(--line);
  background:radial-gradient(60% 120% at 50% 50%,rgba(201,160,90,.06),transparent 70%);
}
.interlude-quote{
  font-size:clamp(22px,3.4vw,38px);font-weight:600;letter-spacing:.08em;line-height:1.8;
}
.interlude-cite{margin-top:22px;font-family:var(--latin);font-size:13px;letter-spacing:.3em;color:var(--muted)}

/* ---------- 贰 / 意象 ---------- */
.archive-head{display:grid;grid-template-columns:1.2fr 1fr auto;gap:clamp(24px,4vw,64px);align-items:end;margin-bottom:clamp(40px,6vh,64px)}
.archive-head p{color:var(--paper-dim);font-size:15px}
.archive-hint{font-size:12px;letter-spacing:.2em;color:var(--muted);white-space:nowrap}
.archive-hint b{color:var(--gold)}
.archive-track{
  display:flex;gap:clamp(16px,2vw,28px);overflow-x:auto;
  padding-bottom:20px;cursor:grab;scrollbar-width:none;
}
.archive-track::-webkit-scrollbar{display:none}
.archive-track.is-dragging{cursor:grabbing}
.archive-card{
  position:relative;flex:0 0 clamp(300px,34vw,460px);aspect-ratio:4/5;
  overflow:hidden;border:1px solid var(--line);
}
.archive-card-wide{flex-basis:clamp(360px,46vw,640px);aspect-ratio:4/3}
.archive-card-tall{flex-basis:clamp(260px,26vw,360px)}
.archive-card img{
  width:100%;height:100%;object-fit:cover;
  filter:brightness(.86) saturate(.94);
  transition:transform 1.1s var(--ease),filter .8s;
}
.archive-card:hover img{transform:scale(1.05);filter:brightness(1) saturate(1)}
.archive-card figcaption{
  position:absolute;inset:auto 0 0 0;padding:22px 24px;
  background:linear-gradient(transparent,rgba(12,10,8,.92) 55%);
  display:flex;flex-direction:column;gap:6px;
}
.archive-card figcaption span{font-size:12px;letter-spacing:.28em;color:var(--gold)}
.archive-card figcaption strong{font-size:16.5px;font-weight:600;letter-spacing:.08em}

/* ---------- 提问交互 ---------- */
.questions{
  display:grid;grid-template-columns:1fr 1.35fr;gap:clamp(40px,6vw,100px);
  background:var(--ink-2);border-top:1px solid var(--line);border-bottom:1px solid var(--line);
}
.question-aside p:not(.eyebrow){color:var(--muted);font-size:14.5px;margin-top:16px}
.question-tabs{display:flex;flex-direction:column;gap:2px;margin-top:34px;border-top:1px solid var(--line)}
.question-tabs button{
  text-align:left;padding:16px 6px;font-size:16px;letter-spacing:.14em;
  color:var(--muted);border-bottom:1px solid var(--line);
  display:flex;justify-content:space-between;align-items:center;
  transition:color .3s,padding-left .4s var(--ease);
}
.question-tabs button::after{content:"→";opacity:0;transition:opacity .3s,transform .4s;transform:translateX(-8px)}
.question-tabs button:hover{color:var(--paper)}
.question-tabs button[aria-selected="true"]{color:var(--gold);padding-left:16px}
.question-tabs button[aria-selected="true"]::after{opacity:1;transform:none}
#question-panel{
  position:relative;padding:clamp(32px,4vw,56px);
  border:1px solid var(--line-strong);background:var(--surface);
  align-self:center;
}
.quote-mark{
  position:absolute;top:-8px;left:22px;font-size:110px;line-height:1;
  font-family:var(--latin);color:var(--gold);opacity:.3;pointer-events:none;
}
#question-title{font-size:clamp(22px,2.6vw,32px);font-weight:700;line-height:1.6;letter-spacing:.05em;margin-bottom:22px}
#question-copy{color:var(--paper-dim);line-height:2.05}
.question-foot{
  display:block;margin-top:28px;padding-top:18px;border-top:1px dashed var(--line-strong);
  font-size:13px;letter-spacing:.2em;color:var(--muted);
}

/* ---------- 叁 / 活动 ---------- */
.section-heading{display:grid;grid-template-columns:1.2fr 1fr;gap:clamp(24px,5vw,80px);align-items:end;margin-bottom:clamp(44px,7vh,72px)}
.section-heading p{color:var(--paper-dim);font-size:15px;line-height:2}
.activity-list{border-top:1px solid var(--line-strong)}
.activity-list details{border-bottom:1px solid var(--line)}
.activity-list summary{
  list-style:none;display:grid;grid-template-columns:70px 1fr auto 40px;align-items:center;gap:clamp(14px,3vw,36px);
  padding:clamp(22px,3.4vh,34px) 8px;cursor:pointer;transition:padding-left .4s var(--ease);
}
.activity-list summary::-webkit-details-marker{display:none}
.activity-list summary:hover{padding-left:22px}
.activity-list summary:hover h3{color:var(--gold)}
.activity-no{font-family:var(--latin);font-size:15px;letter-spacing:.2em;color:var(--muted)}
.activity-list h3{font-size:clamp(20px,2.4vw,28px);font-weight:700;letter-spacing:.1em;transition:color .3s}
.frequency{font-size:12.5px;letter-spacing:.26em;color:var(--muted)}
.detail-sign{font-size:22px;color:var(--gold);transition:transform .45s var(--ease)}
details[open] .detail-sign{transform:rotate(45deg)}
.activity-body{
  padding:0 8px clamp(26px,4vh,40px) calc(70px + clamp(14px,3vw,36px));
  display:flex;flex-direction:column;gap:12px;
}
.activity-english{font-family:var(--latin);font-size:11px;letter-spacing:.4em;color:var(--gold)}
.activity-body p{max-width:52em;color:var(--paper-dim)}
.activity-note{font-size:13px;letter-spacing:.22em;color:var(--muted)}
.schedule-note{margin-top:26px;font-size:13px;letter-spacing:.16em;color:var(--muted)}

/* ---------- 项目实践 ---------- */
.practice{
  display:grid;grid-template-columns:1fr 1.4fr;gap:clamp(40px,6vw,100px);
  background:var(--ink-2);border-top:1px solid var(--line);border-bottom:1px solid var(--line);
}
.practice-content>p{color:var(--paper-dim)}
.numbers{display:flex;gap:clamp(28px,5vw,72px);margin:36px 0 40px;flex-wrap:wrap}
.numbers strong{
  display:block;font-size:clamp(44px,5vw,64px);font-weight:900;line-height:1;
  color:var(--gold);letter-spacing:.02em;
}
.numbers strong span{font-size:.36em;font-weight:400;letter-spacing:.2em;margin-left:6px;color:var(--paper-dim)}
.numbers p{font-size:13px;letter-spacing:.26em;color:var(--muted);margin-top:10px}
.practice blockquote{
  border-left:2px solid var(--gold);padding-left:22px;
  font-size:clamp(16px,1.7vw,19px);line-height:2;color:var(--paper);
}
.practice cite{display:block;margin-top:14px;font-style:normal;font-size:12.5px;letter-spacing:.22em;color:var(--muted)}

/* ---------- 肆 / 同行 ---------- */
.people-grid{display:grid;grid-template-columns:1fr 1fr;gap:clamp(20px,3vw,40px)}
.people-grid article{
  border:1px solid var(--line);padding:clamp(28px,3.6vw,48px);
  background:linear-gradient(160deg,var(--surface),var(--ink));
  transition:border-color .4s,transform .5s var(--ease);
}
.people-grid article:hover{border-color:var(--line-strong);transform:translateY(-4px)}
.person-role{font-size:12px;letter-spacing:.34em;color:var(--gold);margin-bottom:18px}
.people-grid h3{font-size:30px;font-weight:900;letter-spacing:.2em;margin-bottom:8px}
.person-title{font-size:13.5px;letter-spacing:.14em;color:var(--paper-dim);margin-bottom:18px;padding-bottom:18px;border-bottom:1px solid var(--line)}
.people-grid article p:last-child{font-size:14.5px;color:var(--paper-dim);line-height:2}

/* ---------- 学习空间 ---------- */
.library{
  display:grid;grid-template-columns:1fr 1.1fr;gap:clamp(40px,6vw,110px);
  background:var(--ink-2);border-top:1px solid var(--line);
}
.library>div:first-child p:not(.eyebrow){color:var(--paper-dim);margin:18px 0 30px;max-width:30em}
.library-index{display:flex;flex-direction:column;border-top:1px solid var(--line-strong)}
.library-index>span{
  font-family:var(--latin);font-size:11px;letter-spacing:.4em;color:var(--muted);
  padding:14px 4px;
}
.library-index a{
  display:grid;grid-template-columns:44px 1fr auto;gap:18px;align-items:baseline;
  padding:18px 4px;border-top:1px solid var(--line);
  font-family:var(--latin);color:var(--muted);
  transition:padding-left .4s var(--ease),background .4s;
}
.library-index a:hover{padding-left:18px;background:rgba(201,160,90,.05)}
.library-index a strong{font-family:var(--serif);font-size:17.5px;letter-spacing:.14em;color:var(--paper);font-weight:600}
.library-index a span{font-family:var(--serif);font-size:13px;letter-spacing:.12em}

/* ---------- 伍 / 加入 ---------- */
.join{
  display:grid;grid-template-columns:1.3fr 1fr;gap:clamp(40px,6vw,110px);align-items:center;
  background:
    radial-gradient(70% 100% at 20% 20%,rgba(201,160,90,.07),transparent 60%),
    var(--ink);
}
.join-copy>p:not(.eyebrow){color:var(--paper-dim);margin-top:18px;line-height:2}
.join-secondary{font-size:14.5px}
.copy-row{
  display:flex;gap:16px;align-items:center;flex-wrap:wrap;margin-top:30px;
  padding:16px 20px;border:1px solid var(--line-strong);width:fit-content;
}
.copy-row>span{font-size:14px;letter-spacing:.2em;color:var(--muted)}
.copy-row strong{font-family:var(--latin);font-size:24px;letter-spacing:.12em;color:var(--gold);font-weight:600;margin-left:10px}
.copy-button{
  padding:10px 22px;font-size:13px;letter-spacing:.2em;
  border:1px solid var(--gold);color:var(--gold);
  transition:all .35s var(--ease);
}
.copy-button:hover{background:var(--gold);color:var(--ink)}
#copy-status{font-size:13px;letter-spacing:.14em;color:var(--gold);min-height:1.6em;margin-top:14px}
.qr-card{
  justify-self:center;text-align:center;
  border:1px solid var(--line-strong);padding:26px;background:var(--surface);
  max-width:330px;
}
.qr-card img{width:100%;aspect-ratio:1;object-fit:cover;filter:contrast(1.02)}
.qr-card figcaption{font-size:13px;letter-spacing:.16em;color:var(--paper-dim);margin:18px 0 12px;line-height:1.8}
.qr-card a{font-size:12.5px;letter-spacing:.2em;color:var(--gold);border-bottom:1px solid var(--line-strong);padding-bottom:3px;transition:color .3s,border-color .3s}
.qr-card a:hover{color:#dab877;border-color:#dab877}

/* ---------- 页脚 ---------- */
footer{
  display:grid;grid-template-columns:auto 1fr auto auto;gap:clamp(20px,4vw,60px);align-items:center;
  padding:clamp(36px,6vh,56px) clamp(24px,6vw,96px);
  border-top:1px solid var(--line-strong);font-size:13px;
}
.footer-brand{font-size:20px;font-weight:900;letter-spacing:.3em}
.footer-brand span{font-size:11px;font-weight:400;letter-spacing:.26em;color:var(--muted);margin-left:12px}
footer>p{color:var(--paper-dim);letter-spacing:.14em}
footer>div{display:flex;flex-direction:column;gap:4px;text-align:right}
footer>div span{color:var(--paper-dim);letter-spacing:.16em}
footer>div small{color:var(--muted);letter-spacing:.1em;font-size:11.5px}
/* 只作用于页脚右上角的「回到顶部」方块；:last-child 避免连左侧品牌一起套进 44×44 方框 */
footer>a:last-child{
  display:grid;place-items:center;width:44px;height:44px;
  border:1px solid var(--line-strong);color:var(--gold);font-size:16px;
  transition:all .35s;
}
footer>a:last-child:hover{background:var(--gold);color:var(--ink)}

/* ---------- 入场动效 ---------- */
.reveal{opacity:0;transform:translateY(34px);transition:opacity 1s var(--ease),transform 1s var(--ease)}
.reveal.visible{opacity:1;transform:none}
@media (prefers-reduced-motion:reduce){
  .reveal{opacity:1;transform:none;transition:none}
  html{scroll-behavior:auto}
}

/* ---------- 响应式 ---------- */
@media (max-width:1020px){
  .archive-head{grid-template-columns:1fr;gap:14px;align-items:start}
  .questions,.practice{grid-template-columns:1fr}
}
@media (max-width:860px){
  .menu-toggle{display:block}
  .header nav{
    position:fixed;inset:0;background:rgba(12,10,8,.97);
    flex-direction:column;justify-content:center;gap:34px;
    opacity:0;pointer-events:none;transition:opacity .4s;
  }
  .header nav.open{opacity:1;pointer-events:auto}
  .header nav a{font-size:20px}
  .hero-side{display:none}
  .intro-grid,.section-heading,.library,.join,.people-grid{grid-template-columns:1fr}
  .principles{grid-template-columns:1fr}
  .activity-body{padding-left:8px}
  .activity-list summary{grid-template-columns:44px 1fr auto;gap:14px}
  .frequency{display:none}
  footer{grid-template-columns:1fr;text-align:center;justify-items:center}
  footer>div{text-align:center}
  .hero-bottom span:first-child{display:none}
}