/* Figtree = 免费字体里最贴近 samalive 所用 Proxima Nova 的一款（2026-09-19 定稿） */
@import url('https://fonts.googleapis.com/css2?family=Sacramento&family=Figtree:wght@400;500;600;700&display=swap');

:root{
  --bg:#1a1a1a; --fg:#f0f0f0; --muted:#9a9a9a; --line:rgba(255,255,255,.10); --ph:#0f0f0f;
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{background:var(--bg);color:var(--fg);font-family:"Figtree",-apple-system,"Helvetica Neue",Arial,sans-serif;line-height:1.6;-webkit-font-smoothing:antialiased}
/* sticky footer（2026-09-19 阿乐要求：footer 要和其他板块一样贴底）——
   内容不足一屏时（如 about）把 footer 顶到视口底部，避免下方留一大片空白；
   内容超过一屏时完全无副作用（正常文档流高度已足够） */
body{min-height:100vh;display:flex;flex-direction:column}
body>main,body>section{flex:1 0 auto}
.footer{flex-shrink:0}
a{color:inherit;text-decoration:none}

/* nav */
.nav{position:sticky;top:0;z-index:20;display:flex;justify-content:space-between;align-items:center;padding:16px 7vw;background:rgba(26,26,26,.72);backdrop-filter:blur(12px)}
.nav-brand{font-family:"Sacramento",cursive;font-weight:400;font-size:36px;white-space:nowrap;letter-spacing:.02em;color:#c8c8c8;-webkit-text-stroke:1.4px #c8c8c8;text-shadow:none}
.nav-links{display:flex;gap:2vw;align-items:center;font-size:13px;flex-wrap:wrap;justify-content:flex-end}
.nav-links a{color:var(--fg);transition:color .25s;letter-spacing:.04em;white-space:nowrap}
.nav-links a:hover{color:#fff}
.nav-links a.active,.nav-links .series.active{color:#fff;opacity:1;font-weight:600;text-decoration:underline;text-underline-offset:6px;text-decoration-thickness:1.5px;text-decoration-color:rgba(255,255,255,.9)}
/* hamburger (portrait only) */
.hamburger{display:none;flex-direction:column;justify-content:center;gap:5px;background:none;border:none;cursor:pointer;padding:8px;width:32px;height:32px}
.hamburger span{display:block;height:2px;background:var(--fg);border-radius:2px;transition:transform .3s,opacity .3s}
.hamburger.open span:nth-child(1){transform:translateY(7px)rotate(45deg)}
.hamburger.open span:nth-child(2){opacity:0}
.hamburger.open span:nth-child(3){transform:translateY(-7px)rotate(-45deg)}

/* landscape folders grid (modeled on samalive.co /landscape) */
.folders{padding:96px 8.33vw 64px;display:grid;grid-template-columns:1fr 1fr;gap:0}
.folder-tile{position:relative;display:block;aspect-ratio:3/2;overflow:hidden;background:var(--ph)}
.folder-tile img{width:100%;height:100%;object-fit:cover;display:block;transition:transform .6s cubic-bezier(.2,.8,.2,1),filter .6s;-webkit-user-drag:none}
.folder-tile:hover img{transform:scale(1.03);filter:brightness(1.08)}
.folder-label{position:absolute;left:50%;top:50%;transform:translate(-50%,-50%);font-size:15px;font-weight:600;letter-spacing:2.5px;text-transform:uppercase;color:rgba(226,225,225,.9);white-space:nowrap}
@media(max-width:768px){.folders{padding:28px 24px 48px;grid-template-columns:1fr 1fr}.folder-label{font-size:12px;letter-spacing:1.6px}}

/* gallery-strips (justified, modeled on samalive.co) */
.strips{padding:96px 7vw 64px}
.strip-row{display:flex;gap:5px;margin-bottom:5px;width:100%}
/* width + aspect-ratio 只作「占位」：图片加载前若 .strip-item 没有确定尺寸，高度会塌陷为 0，
   所有行叠在视口顶部 → loading="lazy" 失效，整页图片被一次性拉取（实测 19.6MB / 37 张）。
   加上占位后首屏只请求 9 张 / 5.2MB。strips.js 之后写入内联 width/height 覆盖本行，justified 布局不变。
   比例取值来自 HTML 的 data-ar（全站 3/2 与 2/3 为主，另有 4/3、3/4 各一处）。 */
.strip-item{position:relative;flex-shrink:0;width:30%;aspect-ratio:3/2;overflow:hidden;background:var(--ph);cursor:pointer}
.strip-item[data-ar="2/3"]{aspect-ratio:2/3}
.strip-item[data-ar="4/3"]{aspect-ratio:4/3}
.strip-item[data-ar="3/4"]{aspect-ratio:3/4}
.strip-row[data-full] .strip-item{width:100%}
.strip-item img{display:block;width:100%;height:100%;object-fit:cover;transition:transform .6s cubic-bezier(.2,.8,.2,1),filter .6s;-webkit-user-drag:none}
.strip-item:hover img{transform:scale(1.03);filter:brightness(1.08)}
@media(max-width:768px){.strips{padding:28px 24px 48px}}

/* ===== before/after compare slider (presets page, modeled on samalive) ===== */
.compare{padding:96px 7vw}
.compare-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(340px,1fr));gap:44px 36px}
.ba{position:relative;width:100%;aspect-ratio:3/2;background:var(--ph);user-select:none;overflow:hidden}
.ba img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;pointer-events:none;-webkit-user-drag:none}
.ba-after{z-index:1}
.ba-before{z-index:2;clip-path:inset(0 50% 0 0);will-change:clip-path}
.ba-handle{position:absolute;top:0;left:50%;width:4px;height:100%;background:#fff;transform:translateX(-2px);cursor:ew-resize;z-index:3;will-change:left}
.ba-handle::before,.ba-handle::after{content:"";position:absolute;top:50%;width:0;height:0;border-top:12px solid transparent;border-bottom:12px solid transparent;cursor:ew-resize;transition:all .2s ease-out}
.ba-handle::before{left:-24px;border-right:16px solid #fff}
.ba-handle::after{right:-24px;border-left:16px solid #fff}
.ba-label{position:absolute;bottom:10px;font-size:11px;letter-spacing:.1em;color:#fff;text-shadow:0 1px 4px rgba(0,0,0,.8);z-index:2;pointer-events:none}
.ba-label.l{left:12px}.ba-label.r{right:12px}
/* caption：完全对标 samalive —— 两行同字号/同字重(600)/同灰色，居中，行高 2.2（2026-09-19） */
.ba-cap{margin-top:14px;text-align:center;font-size:13px;font-weight:600;line-height:2.2;color:rgba(226,225,225,.7)}
.ba-cap>span{display:block}

/* ===== Presets page: intro heading + bottom note (2026-09-19, 对标 samalive presets 板块) ===== */
.preset-intro{padding:96px 7vw 0;text-align:center}
.preset-intro h1{font-size:16px;font-weight:600;letter-spacing:.34em;text-transform:uppercase;color:var(--fg);padding-left:.17em}
.preset-intro p{max-width:880px;margin:34px auto 0;font-size:13.5px;line-height:2;color:var(--muted)}
.preset-note{padding:0 7vw 96px;text-align:center;font-size:13px;letter-spacing:.02em;color:var(--muted)}

/* lightbox (large image only, transparent grey background — matches samalive) */
.lightbox{position:fixed;inset:0;z-index:100;background:rgba(26,26,26,.94);display:none;flex-direction:column;padding:22px}
.lightbox.open{display:flex}
.lb-top{display:flex;justify-content:flex-end;align-items:center;gap:18px;color:var(--muted);font-size:13px;flex:none}
.lb-close{background:none;border:none;color:var(--fg);font-size:22px;cursor:pointer;line-height:1;padding:0 4px}
.lb-stage{flex:1;display:flex;align-items:center;justify-content:center;position:relative;min-height:0;padding:0}
.lb-img{max-width:calc(100vw - 40px);max-height:calc(100vh - 88px);width:auto;height:auto;object-fit:contain;background:transparent}
.lb-nav{position:absolute;top:50%;transform:translateY(-50%);font-size:34px;color:var(--fg);background:none;border:none;cursor:pointer;padding:10px 16px;opacity:.7;transition:opacity .2s}
.lb-nav:hover{opacity:1}
.lb-prev{left:6px}.lb-next{right:6px}

/* ===== About Page (samalive style) ===== */
.about-page{padding:96px 7vw 80px}
.about-row{display:flex;gap:60px;align-items:flex-start}
.about-photo{flex-shrink:0}
.about-photo img{width:220px;height:220px;object-fit:cover;border-radius:50%;display:block}
.about-text{flex:1;min-width:0}
.about-text h2{font-size:28px;font-weight:700;letter-spacing:.02em;margin-bottom:28px;color:var(--fg)}
/* 2026-09-19 阿乐删掉副标题 "Photographer (slot reserved)"，其样式一并移除 */
.about-text p{color:var(--muted);font-size:15px;line-height:1.85;margin-bottom:20px}
.about-text blockquote{border-left:2px solid rgba(255,255,255,.18);padding-left:20px;font-style:italic;color:#b0b0b0;font-size:15px;line-height:1.7;margin:36px 0}

@media(max-width:768px){
  .about-row{flex-direction:column;align-items:center;text-align:center;gap:32px}
  .about-photo img{width:180px;height:180px}
  .about-page{padding:64px 24px 56px}
  /* 竖屏引语：文字改回左对齐（横屏就是这么排的），左竖杠才会紧贴文字；
     若跟着段落一起居中，整宽容器 + 居中文字会把竖杠甩到容器最左边（2026-09-19 阿乐反馈） */
  .about-text blockquote{text-align:start}
}

/* footer */
.footer{padding:56px 7vw 32px;display:grid;grid-template-columns:1fr auto;gap:32px}
.footer h3{font-size:13px;letter-spacing:.14em;margin-bottom:10px;font-weight:600}
.footer p{color:var(--fg);font-size:12.5px;font-weight:600}
.foot-col{grid-column:2;justify-self:end;padding-right:8vw}
.foot-col a{color:var(--fg);text-decoration:underline;text-underline-offset:4px;text-decoration-thickness:1px;text-decoration-color:rgba(240,240,240,.55);font-weight:600}
.foot-col a:hover{color:#fff;text-decoration-color:#fff}
.foot-bottom{grid-column:1/-1;text-align:center;color:var(--muted);font-size:12px;margin-top:24px}

@media(max-width:768px){
  /* hamburger menu: portrait shows, nav hidden */
  .hamburger{display:flex;margin-left:auto}
  .nav-brand{margin-right:0}
  .nav-links{display:none;position:absolute;top:100%;left:0;right:0;flex-direction:column;gap:0;background:#1a1a1a;border-bottom:1px solid var(--line);padding:12px 20px 16px}
  .nav-links.open{display:flex}
  .nav-links a{padding:10px 0;font-size:14px;border-bottom:1px solid rgba(255,255,255,.06)}
  .nav-links a:last-of-type{border-bottom:none}

  /* 竖屏（≤768px）footer 保持横屏的相对位置：
     .foot-col 留在显式第 1 列（否则 grid-column:2 会生成「隐式列」，
     而 .foot-bottom 的 grid-column:1/-1 里 -1 只按【显式列】解析 → 版权行被压进窄列、左偏且折行） */
  .footer{grid-template-columns:1fr}
  .foot-col{grid-column:1}
  .nav{padding:14px 24px}
  .compare{padding:48px 24px}
  .preset-intro{padding:48px 24px 0}
  .preset-intro p{margin-top:20px;line-height:1.9}
  .preset-note{padding:0 24px 48px}
}

/* 图片下载温和防护：禁拖拽 / 禁 iOS 长按「存储图像」菜单
   （仅供劝退顺手存图，非绝对保护；刻意不写 user-select:none 到 body，避免影响邮箱复制） */
img{-webkit-user-drag:none;-webkit-touch-callout:none;user-select:none;-webkit-user-select:none}