/* ============================================================
   紫韵新艺 · base.css —— 结构层（皮肤与结构分离·第 2 层）
   只管布局 / 栅格 / 排版骨架 / 响应式。不依赖任何具体配色（只用 --c-*）。
   ============================================================ */
*{box-sizing:border-box;margin:0;padding:0}
html{background:var(--c-bg);scroll-behavior:smooth}
body{font-family:var(--c-sans);line-height:1.8;color:var(--c-fg);-webkit-font-smoothing:antialiased;
  overflow-x:hidden;background:transparent;transition:color .5s var(--c-ease),background .5s var(--c-ease);
  font-feature-settings:"liga" 1,"calt" 1}
/* 全局 35mm 颗粒叠层 */
body::after{content:"";position:fixed;inset:0;pointer-events:none;z-index:9999;
  background:var(--c-noise);opacity:.035;mix-blend-mode:overlay}

/* 通用排版 */
.wrap{max-width:var(--c-maxw);margin:0 auto;padding:0 clamp(16px,4vw,40px)}
.band{padding:clamp(46px,7vw,92px) 0}
.eyebrow{font-size:11px;letter-spacing:4px;text-transform:uppercase;color:var(--c-gold);font-weight:600}
.sec-head{display:flex;align-items:flex-end;gap:18px;margin-bottom:26px}
.sec-idx{font-family:var(--c-display);font-size:clamp(46px,7vw,84px);line-height:.78;
  color:transparent;-webkit-text-stroke:2px var(--c-gold);flex:none}
.sec-head h2{font-family:var(--c-serif);font-weight:600;color:var(--c-fg-strong);
  font-size:clamp(28px,5vw,46px);line-height:1.05;letter-spacing:1px}
.sec-head .lat{display:block;font-family:var(--c-display);font-style:italic;font-size:16px;color:var(--c-muted);margin-top:5px}
.rule{display:flex;align-items:center;gap:12px;margin:34px 0;color:var(--c-gold)}
.rule::before,.rule::after{content:"";height:1px;flex:1;background:linear-gradient(90deg,transparent,var(--c-gold),transparent)}
.rule .dot{width:6px;height:6px;transform:rotate(45deg);background:var(--c-gold)}
.dropcap{float:left;font-family:var(--c-display);font-weight:700;color:var(--c-violet);
  font-size:62px;line-height:.78;margin:6px 14px 0 0}
.read-more{display:inline-block;margin-top:14px;color:var(--c-violet);text-decoration:none;
  font-size:14px;letter-spacing:.5px;border-bottom:1.5px solid var(--c-card-border);padding-bottom:2px;transition:color .25s,border-color .25s}
.read-more:hover{color:var(--c-gold);border-color:var(--c-gold)}

/* 导航（品牌 + 链接 + 切换） */
.nav{position:sticky;top:0;z-index:50;display:flex;align-items:center;gap:16px;
  padding:12px clamp(16px,4vw,40px);background:color-mix(in srgb,var(--c-bg) 76%,transparent);
  backdrop-filter:blur(16px) saturate(1.2);border-bottom:1px solid var(--c-rule)}
.brand{display:flex;align-items:center;gap:11px;text-decoration:none;color:var(--c-fg-strong)}
.brand .wm{font-family:var(--c-display);font-size:21px;font-weight:600;letter-spacing:.4px}
.links{display:flex;gap:22px;margin-left:auto;flex-wrap:wrap}
.links a{color:var(--c-muted);text-decoration:none;font-size:13.5px;transition:color .25s}
.links a:hover{color:var(--c-violet)}
.toggle{font-family:var(--c-sans);font-size:12.5px;color:var(--c-fg);background:transparent;
  border:1px solid var(--c-card-border);border-radius:999px;padding:6px 13px;cursor:pointer;transition:all .25s}
.toggle:hover{background:var(--c-gold);color:#fff;border-color:var(--c-gold)}

/* Hero */
.hero{max-width:var(--c-maxw);margin:0 auto;padding:clamp(44px,7vw,96px) clamp(16px,4vw,40px) 40px}
.hero-grid{display:grid;grid-template-columns:1.05fr .95fr;gap:clamp(28px,5vw,60px);align-items:center}
.kicker{font-size:11px;letter-spacing:4px;text-transform:uppercase;color:var(--c-gold);font-weight:600;margin-bottom:20px}
.display{font-family:var(--c-display);font-weight:600;color:var(--c-fg-strong);
  font-size:clamp(50px,9vw,108px);line-height:.98;letter-spacing:.5px}
.display em{font-style:italic;color:var(--c-violet);font-weight:500}
.sub{margin-top:24px;max-width:44ch;color:var(--c-muted);font-size:clamp(15px,2vw,18px)}
.sub b{color:var(--c-violet);font-weight:600}
.cta{display:inline-block;margin-top:32px;padding:13px 30px;border-radius:999px;
  background:var(--c-violet);color:#fff;font-weight:600;text-decoration:none;
  transition:transform .25s var(--c-ease),box-shadow .25s}
.cta:hover{transform:translateY(-3px) scale(1.03);box-shadow:0 14px 34px rgba(122,95,160,.3)}

/* 画框 + 墨入水显影 */
.plate{position:relative;padding:13px;border:1px solid var(--c-card-border);border-radius:8px;
  background:var(--c-card-2);box-shadow:0 24px 60px rgba(90,66,128,.14)}
.plate .art{position:relative;aspect-ratio:4/5;overflow:hidden;border-radius:4px;background:var(--c-card-2)}
.plate .art svg,.plate .art img{width:100%;height:100%;display:block;object-fit:cover}
.plate .art{clip-path:circle(0% at 50% 55%);filter:blur(14px);opacity:0;
  transition:clip-path 1.9s var(--c-ease),filter 1.9s var(--c-ease),opacity 1.2s ease}
.plate.revealed .art{clip-path:circle(150% at 50% 55%);filter:blur(0);opacity:1}
.plate figcaption{margin-top:12px;font-family:var(--c-display);font-style:italic;font-size:14px;color:var(--c-muted);text-align:center}
.vine{position:absolute;width:74px;height:74px;pointer-events:none}
.vine.tl{top:8px;left:8px}.vine.br{right:8px;bottom:8px;transform:rotate(180deg)}
.vine path{fill:none;stroke:var(--c-gold);stroke-width:1.3;opacity:.8}
.vine .leaf{fill:var(--c-violet);opacity:.5}
.scroll-cue{margin-top:48px;text-align:center;font-size:12.5px;letter-spacing:2px;color:var(--c-muted)}
.scroll-cue span{display:block;margin:8px auto 0;width:1px;height:32px;background:linear-gradient(var(--c-gold),transparent);animation:cue 1.8s var(--c-ease) infinite}
@keyframes cue{0%{transform:scaleY(.2);opacity:.3}50%{transform:scaleY(1);opacity:1}100%{transform:scaleY(.2);opacity:.3}}

/* 大图分隔 Banner（矩形·浅紫纸感） */
.banner{position:relative;border:1px solid var(--c-card-border);border-radius:14px;
  overflow:hidden;aspect-ratio:16/5.6;display:flex;align-items:flex-end;
  padding:clamp(20px,3vw,42px);background:linear-gradient(120deg,var(--c-banner-1),var(--c-banner-2))}
.banner .deco{position:absolute;inset:0;width:100%;height:100%;pointer-events:none;opacity:.95}
.banner .banner-img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;z-index:1}
.banner.has-img::before{content:"";position:absolute;inset:0;z-index:2;
  background:linear-gradient(90deg,rgba(240,235,246,.94) 0%,rgba(240,235,246,.82) 34%,rgba(240,235,246,.18) 68%,rgba(240,235,246,.05) 100%)}
[data-theme="dark"] .banner.has-img::before{
  background:linear-gradient(90deg,rgba(13,10,18,.94) 0%,rgba(13,10,18,.82) 34%,rgba(13,10,18,.2) 68%,rgba(13,10,18,.06) 100%)}
.banner::after{content:"";position:absolute;inset:0;background:var(--c-noise);opacity:.05;mix-blend-mode:overlay;z-index:2}
.banner .bcontent{position:relative;z-index:3;color:var(--c-banner-ink);max-width:62%}
.banner .bcontent .eyebrow{color:var(--c-violet-deep)}
.banner .bcontent h3{font-family:var(--c-serif);font-weight:700;font-size:clamp(24px,4.2vw,42px);
  color:var(--c-banner-ink);margin-top:6px;line-height:1.1}
.banner .bcontent .bdesc{margin-top:8px;font-size:clamp(13px,1.6vw,15px);color:var(--c-banner-muted);max-width:46ch;line-height:1.65}
.banner .tag{position:absolute;top:18px;right:24px;z-index:3;font-size:11px;letter-spacing:2px;
  text-transform:uppercase;color:var(--c-violet-deep);border:1px solid rgba(122,95,160,.4);border-radius:999px;padding:4px 12px}

/* 新闻 */
.news-grid{display:grid;grid-template-columns:1.15fr .85fr;gap:36px;margin-top:34px}
.lead-card{background:var(--c-card);border:1px solid var(--c-card-border);border-radius:12px;overflow:hidden;
  transition:transform .3s var(--c-ease),box-shadow .3s}
.lead-card:hover{transform:translateY(-4px);box-shadow:0 18px 44px rgba(90,66,128,.12)}
.lead-card .thumb{aspect-ratio:16/9;position:relative;background:var(--c-card-2);overflow:hidden}
.lead-card .thumb svg,.lead-card .thumb img{width:100%;height:100%;display:block;object-fit:cover}
.lead-card .body{padding:22px}
.lead-card h3{font-family:var(--c-serif);font-weight:600;color:var(--c-fg-strong);font-size:24px;line-height:1.2}
.lead-card p{margin-top:12px;color:var(--c-muted);font-size:15px}
.news-list .ni{display:flex;gap:14px;padding:15px 0;border-bottom:1px solid var(--c-rule)}
.news-list .ni:last-child{border-bottom:none}
.news-list .d{font-family:var(--c-display);color:var(--c-gold);font-size:14px;flex:none;width:50px;padding-top:2px}
.news-list .ni a{color:var(--c-fg-strong);text-decoration:none;font-size:15px;transition:color .2s}
.news-list .ni a:hover{color:var(--c-violet)}

/* 摄影（3 幅 + 解读） */
.photo-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(280px,1fr));gap:24px;margin-top:34px}
.photo-card{background:var(--c-card);border:1px solid var(--c-card-border);border-radius:12px;overflow:hidden;
  transition:transform .3s var(--c-ease),box-shadow .3s,border-color .3s}
.photo-card:hover{transform:translateY(-6px);border-color:var(--c-gold);box-shadow:0 22px 50px rgba(90,66,128,.14)}
.photo-card .frame{aspect-ratio:4/5;position:relative;background:var(--c-card-2);overflow:hidden}
.photo-card .frame svg,.photo-card .frame img{width:100%;height:100%;display:block;object-fit:cover}
.photo-card .note{padding:18px}
.photo-card .note .t{font-family:var(--c-serif);font-weight:600;color:var(--c-fg-strong);font-size:20px}
.photo-card .note p{margin-top:8px;color:var(--c-muted);font-size:14px}

/* 拉片 */
.film-block{display:grid;grid-template-columns:1.1fr .9fr;gap:34px;margin-top:34px;align-items:center}
.film-still{aspect-ratio:16/9;border:1px solid var(--c-card-border);border-radius:12px;overflow:hidden;position:relative;background:var(--c-card-2)}
.film-still svg,.film-still img{width:100%;height:100%;display:block;object-fit:cover}
.film-text h3{font-family:var(--c-serif);font-weight:600;color:var(--c-fg-strong);font-size:clamp(24px,3.5vw,34px)}
.film-text .meta{color:var(--c-violet-deep);font-size:13px;letter-spacing:1px;margin-top:6px;font-weight:500}
.film-text p{margin-top:14px;color:var(--c-muted);font-size:15.5px}

/* AIGC 关键词 */
.aigc-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(260px,1fr));gap:24px;margin-top:34px}
.aigc-card{background:var(--c-card);border:1px solid var(--c-card-border);border-radius:12px;overflow:hidden;
  transition:transform .3s var(--c-ease),box-shadow .3s,border-color .3s}
.aigc-card:hover{transform:translateY(-5px);border-color:var(--c-gold);box-shadow:0 20px 46px rgba(90,66,128,.12)}
.aigc-card .img{aspect-ratio:4/3;position:relative;background:var(--c-card-2);overflow:hidden}
.aigc-card .img svg,.aigc-card .img img{width:100%;height:100%;display:block;object-fit:cover}
.aigc-card .prompt{padding:16px;font-family:var(--c-display);font-style:italic;font-size:14px;color:var(--c-muted);line-height:1.55}
.aigc-card .prompt b{color:var(--c-violet);font-style:normal;font-weight:600}

/* 剧本 */
.script-block{display:grid;grid-template-columns:.9fr 1.1fr;gap:34px;margin-top:34px;align-items:center}
.script-img{aspect-ratio:4/5;border:1px solid var(--c-card-border);border-radius:12px;overflow:hidden;position:relative;background:var(--c-card-2)}
.script-img svg,.script-img img{width:100%;height:100%;display:block;object-fit:cover}
.script-text h3{font-family:var(--c-serif);font-weight:600;color:var(--c-fg-strong);font-size:clamp(24px,3.5vw,34px)}
.script-text .meta{color:var(--c-violet-deep);font-size:13px;letter-spacing:1px;margin-top:6px;font-weight:500}
.script-text p{margin-top:14px;color:var(--c-muted);font-size:15.5px}

/* 页脚 */
footer{display:flex;align-items:center;gap:16px;justify-content:center;flex-wrap:wrap;
  padding:50px 20px;border-top:1px solid var(--c-rule);color:var(--c-muted);font-size:13px}
footer p{text-align:center}
footer .wm{font-size:15px}

/* 入场动效 + 响应式 */
.js .reveal{opacity:0;transform:translateY(20px);transition:opacity .8s var(--c-ease),transform .8s var(--c-ease)}
.reveal.in{opacity:1;transform:none}
@media(max-width:860px){
  .hero-grid,.news-grid,.film-block,.script-block{grid-template-columns:1fr}
  .plate{max-width:400px;margin:0 auto}
  .banner{aspect-ratio:16/7}.banner .bcontent{max-width:100%}
}
@media(max-width:680px){.links{display:none}.banner{border-radius:10px;aspect-ratio:16/8}}
/* 减少动画：关闭内容入场/墨入水/滚动提示（纯装饰流光在 skin.css 保留） */
@media(prefers-reduced-motion:reduce){
  .reveal{opacity:1!important;transform:none!important}
  .plate .art{clip-path:none!important;filter:none!important;opacity:1!important}
  .scroll-cue span{animation:none!important}
}