/* ============================================================
   Portfolio — style.css
   深色极简作品集样式（无依赖，纯 CSS）
   ============================================================ */

:root{
  --bg:#0b0b0d;
  --bg-soft:#131317;
  --fg:#ececef;
  --muted:#8d8d96;
  --line:#232329;
  --accent:#d8b58a;
  --radius:14px;
  --maxw:1360px;
  --gap:clamp(14px,2.2vw,28px);
  --ease:cubic-bezier(.22,.61,.36,1);
}

*{box-sizing:border-box}
html{scroll-behavior:smooth}
section[id]{scroll-margin-top:110px}
body{
  margin:0;background:var(--bg);color:var(--fg);
  font:16px/1.65 ui-sans-serif,system-ui,-apple-system,"Segoe UI",Roboto,"Helvetica Neue",Arial,"PingFang SC","Microsoft YaHei",sans-serif;
  -webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility;
}
img,video{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
h1,h2,h3{line-height:1.15;letter-spacing:-.02em;margin:0}
p{margin:0}
.wrap{width:100%;max-width:var(--maxw);margin:0 auto;padding:0 clamp(18px,4vw,56px)}
.muted{color:var(--muted)}

/* ---------- 顶部导航 ---------- */
.site-header{
  position:sticky;top:0;z-index:50;
  backdrop-filter:blur(14px);
  background:color-mix(in srgb,var(--bg) 78%,transparent);
  border-bottom:1px solid transparent;transition:border-color .3s var(--ease)
}
.site-header.scrolled{border-bottom-color:var(--line)}
.header-inner{display:flex;align-items:center;justify-content:space-between;height:64px}
.brand{font-weight:600;letter-spacing:.02em;font-size:clamp(20px,2.2vw,27px);line-height:1.25}
.nav{display:flex;gap:clamp(16px,2.4vw,32px);font-size:14px}
.nav a{color:var(--muted);transition:color .2s var(--ease)}
.nav a:hover{color:var(--fg)}

/* ---------- Hero ---------- */
.hero{padding:clamp(72px,12vh,160px) 0 clamp(48px,7vh,96px)}
.eyebrow{
  font-size:12px;letter-spacing:.18em;text-transform:uppercase;
  color:var(--accent);margin-bottom:22px
}
.hero h1{font-size:clamp(34px,6.4vw,78px);font-weight:600;max-width:20ch}
.lead{margin-top:26px;max-width:56ch;font-size:clamp(15px,1.6vw,18px);color:#c9c9d2}
.lead .muted{display:block;margin-top:8px;font-size:.94em}
.hero-actions{display:flex;gap:12px;margin-top:38px;flex-wrap:wrap}
.btn{
  display:inline-block;padding:12px 22px;border-radius:999px;
  border:1px solid var(--line);font-size:14px;letter-spacing:.02em;
  transition:transform .2s var(--ease),border-color .2s var(--ease),background .2s var(--ease)
}
.btn:hover{transform:translateY(-1px);border-color:#3a3a44}
.btn.ghost{color:var(--muted)}

/* ---------- 区块标题 ---------- */
.section-title{
  font-size:13px;letter-spacing:.2em;text-transform:uppercase;color:var(--muted);
  font-weight:500;padding-bottom:18px;border-bottom:1px solid var(--line);margin-bottom:36px
}

/* ---------- 作品网格 ---------- */
.work{padding:clamp(40px,6vh,80px) 0}
.grid{display:grid;grid-template-columns:repeat(2,1fr);gap:var(--gap)}
.card{display:block}
.card-media{
  position:relative;overflow:hidden;border-radius:var(--radius);
  background:var(--bg-soft);aspect-ratio:4/5
}
.card-media img{
  width:100%;height:100%;object-fit:cover;
  transition:transform .8s var(--ease),filter .5s var(--ease)
}
.card:hover .card-media img{transform:scale(calc(var(--zoom, 1) * 1.035))}
/* 特色大卡片（跨两列、16:9） */
.card.featured{grid-column:1/-1}
.card.featured .card-media{aspect-ratio:16/9}
.card.featured .card-body h3{font-size:clamp(17px,2.1vw,24px)}

/* 封面裁切：焦点(object-position) + 缩放 —— 编辑器与网站共用同一套 CSS 变量 */
.crop-img{
  width:100%;height:100%;object-fit:cover;
  object-position:var(--pos, 50% 50%);
  transform:scale(var(--zoom, 1));
  transform-origin:var(--pos, 50% 50%);
}

.card-body{padding:16px 4px 6px}
.card-body h3{font-size:clamp(15px,1.5vw,18px);font-weight:500}
.card-body .meta{margin-top:6px;font-size:13px;color:var(--muted)}

/* ---------- About ---------- */
.about{padding:clamp(56px,9vh,120px) 0}
.about-grid{display:grid;grid-template-columns:minmax(0,320px) minmax(0,1fr);gap:clamp(24px,4vw,64px);align-items:start}
.about-photo{border-radius:var(--radius);overflow:hidden;background:var(--bg-soft);aspect-ratio:3/4}
.about-photo img{width:100%;height:100%;object-fit:cover}
.about-text p+p{margin-top:16px}
.links{list-style:none;display:flex;flex-wrap:wrap;gap:22px;padding:0;margin:30px 0 0;font-size:14px}
.links a{color:var(--muted);border-bottom:1px solid var(--line);padding-bottom:2px;transition:color .2s var(--ease),border-color .2s var(--ease)}
.links a:hover{color:var(--fg);border-color:#3a3a44}

/* ---------- Contact 联系区 ---------- */
.contact{padding:clamp(48px,8vh,110px) 0}
.contact-inner{display:flex;flex-wrap:wrap;gap:clamp(24px,5vw,72px);align-items:flex-start;justify-content:space-between}
.contact-inner .muted{margin-bottom:14px}
.contact-mail{
  display:inline-block;font-size:clamp(18px,2.4vw,30px);font-weight:500;letter-spacing:-.01em;
  border-bottom:1px solid var(--line);padding-bottom:3px;transition:border-color .2s var(--ease),color .2s var(--ease)
}
.contact-mail:hover{border-color:var(--accent);color:var(--accent)}

/* ---------- 悬浮上一个 / 下一个（与内容列对齐 + 垂直居中） ---------- */
.float-nav{
  --fbtn:clamp(76px,6.4vw,108px);
  position:fixed;top:50%;left:0;right:0;transform:translateY(-50%);z-index:45;
  display:flex;justify-content:center;pointer-events:none
}
.float-inner{
  display:grid;
  grid-template-columns:minmax(0,1fr) min(var(--maxw), calc(100% - (var(--fbtn) + 24px) * 2)) minmax(0,1fr);
  align-items:center;width:100%;pointer-events:none
}
.float-btn.prev{grid-column:1;justify-self:center}
.float-btn.next{grid-column:3;justify-self:center}
.float-spacer{width:var(--fbtn);height:var(--fbtn);flex:0 0 auto}
.float-btn{
  pointer-events:auto;position:relative;flex:0 0 auto;display:flex;align-items:center;justify-content:center;
  width:var(--fbtn);height:var(--fbtn);border-radius:50%;
  background:color-mix(in srgb,var(--bg-soft) 88%,transparent);
  border:1px solid var(--line);backdrop-filter:blur(12px);
  font-size:calc(var(--fbtn) * 0.40);line-height:1;color:var(--fg);
  transition:transform .25s var(--ease),border-color .25s var(--ease),color .25s var(--ease)
}
.float-btn:hover{transform:scale(1.07);border-color:var(--accent);color:var(--accent)}
.float-label{
  position:absolute;top:50%;transform:translateY(-50%);white-space:nowrap;
  font-size:12px;color:var(--muted);opacity:0;transition:opacity .25s var(--ease);pointer-events:none
}
/* 标签向“外侧”弹出，避免遮住作品图 */
.float-btn.prev .float-label{right:calc(100% + 14px)}
.float-btn.next .float-label{left:calc(100% + 14px)}
.float-btn:hover .float-label{opacity:1}
@media (max-width:680px){
  .float-nav{--fbtn:58px;top:auto;bottom:14px;transform:none}
  .float-inner{display:flex;justify-content:space-between;padding:0 12px}
  .float-label{display:none}
}

/* ---------- 作品详情页 ---------- */
.project-hero{padding:clamp(40px,7vh,96px) 0 0}
.project-hero h1{font-size:clamp(28px,4.6vw,54px);font-weight:600}
.project-sub{margin-top:14px;color:var(--muted);font-size:clamp(14px,1.4vw,17px)}
.meta-bar{
  display:flex;flex-wrap:wrap;gap:clamp(20px,4vw,56px);
  margin:34px 0 0;padding:22px 0;border-top:1px solid var(--line);border-bottom:1px solid var(--line)
}
.meta-item{font-size:13px}
.meta-item dt{color:var(--muted);letter-spacing:.12em;text-transform:uppercase;font-size:11px;margin-bottom:6px}
.meta-item dd{margin:0;font-size:14px}
.project-body{padding:clamp(36px,6vh,72px) 0}
.project-body p{max-width:70ch;color:#c9c9d2}
.project-body p+p{margin-top:18px}
.figure{margin:clamp(28px,4vh,52px) 0}
.figure img,.figure video{border-radius:var(--radius);background:var(--bg-soft);width:100%}
.figure figcaption{margin-top:12px;font-size:13px;color:var(--muted)}
.gallery{display:grid;grid-template-columns:repeat(2,1fr);gap:var(--gap)}
.gallery .figure{margin:0}
.gallery .figure.wide{grid-column:1/-1}
.project-nav{
  display:flex;justify-content:space-between;gap:20px;
  padding:clamp(28px,5vh,56px) 0;border-top:1px solid var(--line);font-size:14px
}
.project-nav a{color:var(--muted);transition:color .2s var(--ease)}
.project-nav a:hover{color:var(--fg)}

/* ---------- 图片灯箱 ---------- */
.lightbox{
  position:fixed;inset:0;z-index:100;display:none;
  background:rgba(8,8,10,.94);backdrop-filter:blur(6px);
  align-items:center;justify-content:center;padding:3vh 3vw
}
.lightbox.open{display:flex}
.lightbox img{max-width:100%;max-height:94vh;border-radius:8px;object-fit:contain}
.lightbox-close{position:absolute;top:22px;right:26px;font-size:28px;line-height:1;color:#fff;opacity:.65;cursor:pointer;background:none;border:0}
.lightbox-close:hover{opacity:1}

/* ---------- 页脚 ---------- */
.site-footer{border-top:1px solid var(--line);margin-top:clamp(48px,8vh,120px)}
.footer-inner{display:flex;justify-content:space-between;align-items:center;height:88px;font-size:13px;color:var(--muted)}
.footer-inner a{color:var(--muted)}
.footer-inner a:hover{color:var(--fg)}

/* ---------- 入场动画 ---------- */
.reveal{opacity:0;transform:translateY(18px);transition:opacity .7s var(--ease),transform .7s var(--ease)}
.reveal.in{opacity:1;transform:none}

/* ---------- 响应式 ---------- */
@media (max-width:900px){
  .about-grid{grid-template-columns:1fr}
  .about-photo{max-width:280px}
}
@media (max-width:680px){
  .grid,.gallery{grid-template-columns:1fr}
  .card-media{aspect-ratio:4/3}
  .card.featured .card-media{aspect-ratio:16/10}
  .footer-inner{height:auto;flex-direction:column;gap:10px;padding:22px 0}
}

/* ---------- 打印/无动画偏好 ---------- */
@media (prefers-reduced-motion:reduce){
  .reveal{opacity:1;transform:none;transition:none}
  html{scroll-behavior:auto}
}

/* ---------- 顶部栏：名字不贴顶 + 语言切换 ---------- */
.header-inner{height:auto;min-height:clamp(84px,10vh,112px);padding:12px 0;gap:18px}
.header-right{display:flex;align-items:center;gap:clamp(14px,2vw,30px);flex-wrap:wrap}
.lang-btn{
  font:inherit;font-size:13px;letter-spacing:.06em;color:var(--muted);cursor:pointer;
  background:none;border:1px solid var(--line);border-radius:999px;padding:7px 15px;
  transition:color .2s var(--ease),border-color .2s var(--ease)
}
.lang-btn:hover{color:var(--fg);border-color:#3a3a44}
@media (max-width:680px){
  .header-inner{min-height:74px}
  .nav{font-size:13px}
}

/* ============================================================
   排版风格变体：html[data-style="minimal|editorial|swiss"]
   ============================================================ */
/* ---------- B. Editorial（衬线标题 · 杂志感） ---------- */
html[data-style="editorial"] h1,
html[data-style="editorial"] .section-title,
html[data-style="editorial"] .card-body h3,
html[data-style="editorial"] .contact-mail{
  font-family:Georgia,"Times New Roman","Songti SC","SimSun",serif;font-weight:400
}
html[data-style="editorial"] .hero h1{font-size:clamp(30px,5.2vw,64px);letter-spacing:0;max-width:24ch}
html[data-style="editorial"] .section-title{
  text-transform:none;letter-spacing:0;font-size:clamp(20px,2.4vw,30px);color:var(--fg);
  border-bottom:0;padding-bottom:0;margin-bottom:26px
}
html[data-style="editorial"] .eyebrow{color:var(--fg);opacity:.55}
html[data-style="editorial"] .card-media{border-radius:0}
html[data-style="editorial"] .btn{border-radius:0;background:transparent}
html[data-style="editorial"] .about-text p{font-size:17px}
html[data-style="editorial"] .grid{gap:clamp(22px,3.4vw,44px)}

/* ---------- C. Swiss（瑞士网格 · 紧凑 · 3 列） ---------- */
html[data-style="swiss"] .hero{padding:clamp(56px,9vh,110px) 0 clamp(32px,5vh,64px)}
html[data-style="swiss"] .hero h1{font-size:clamp(28px,4.4vw,54px);font-weight:700;letter-spacing:-.035em}
html[data-style="swiss"] .section-title{
  border-bottom:2px solid var(--fg);padding-bottom:10px;color:var(--fg);letter-spacing:.06em;font-size:12px
}
html[data-style="swiss"] .grid{grid-template-columns:repeat(3,1fr);gap:clamp(10px,1.4vw,18px)}
html[data-style="swiss"] .card-media{border-radius:0;aspect-ratio:1/1}
html[data-style="swiss"] .card.featured .card-media{aspect-ratio:21/9}
html[data-style="swiss"] .card-body{padding:10px 2px 4px}
html[data-style="swiss"] .card-body h3{font-size:14px;font-weight:600;letter-spacing:-.01em}
html[data-style="swiss"] .card-body .meta{font-size:11px;text-transform:uppercase;letter-spacing:.08em}
html[data-style="swiss"] .btn{border-radius:0}
html[data-style="swiss"] .about-photo{border-radius:0;aspect-ratio:1/1}
@media (max-width:900px){
  html[data-style="swiss"] .grid{grid-template-columns:repeat(2,1fr)}
}
@media (max-width:680px){
  html[data-style="swiss"] .grid{grid-template-columns:1fr}
  html[data-style="swiss"] .card-media{aspect-ratio:4/3}
}

/* ---------- 风格切换条（只在 ?styles=1 预览时出现） ---------- */
#stylebar{
  position:fixed;left:50%;bottom:18px;transform:translateX(-50%);z-index:60;display:none;
  gap:8px;align-items:center;background:#0b0b0dee;border:1px solid var(--line);
  padding:8px 12px;border-radius:999px;backdrop-filter:blur(10px);font-size:12px;color:var(--muted)
}
#stylebar.show{display:flex}
#stylebar button{
  font:inherit;font-size:12px;padding:5px 12px;border-radius:999px;border:1px solid var(--line);
  background:transparent;color:var(--muted);cursor:pointer
}
#stylebar button.active{background:var(--accent);border-color:var(--accent);color:#151313;font-weight:600}