/* ===========================================================
   毕钰涵 · 平面设计师作品集 2026
   配色直接取自原稿：主黄 #FFB900 / 黑 #111 / 米白 #FEFBF0
   =========================================================== */

:root{
  --y:#FFB900;          /* 品牌黄，取自封面色带 */
  --y-dk:#E0A200;       /* 深一档，用于悬停 */
  --y-lt:#FFF6DC;       /* 浅黄底 */
  --ink:#111111;
  --ink-2:#5A5A5A;
  --cream:#FEFBF0;      /* 页面底色，取自原稿背景 */
  --white:#FFFFFF;
  --line:#111111;
  --shadow:5px 5px 0 var(--ink);
  --shadow-sm:3px 3px 0 var(--ink);
  --r-lg:22px;
  --r-md:16px;
  --r-pill:999px;
  --bar:64px;           /* 顶栏高度 */
  --ease:cubic-bezier(.22,.8,.28,1);
}

*,*::before,*::after{box-sizing:border-box}
/* 别让 display 覆盖 hidden 属性（灯箱 / 返回顶部） */
[hidden]{display:none!important}

html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{
  margin:0;
  background:var(--cream);
  color:var(--ink);
  font-family:"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Source Han Sans SC","Noto Sans CJK SC",system-ui,sans-serif;
  font-size:16px;
  line-height:1.7;
  overflow-x:hidden;
}
img{max-width:100%;display:block;height:auto}
a{color:inherit;text-decoration:none}
button{font:inherit;color:inherit;cursor:pointer}
h1,h2,h3{font-weight:900;letter-spacing:-.02em;line-height:1.15;margin:0}
::selection{background:var(--y);color:var(--ink)}

.skip{position:absolute;left:-9999px;top:0;z-index:99;background:var(--y);padding:10px 18px;border-radius:0 0 12px 0;font-weight:700}
.skip:focus{left:0}

.wrap{width:min(1240px,100% - 48px);margin-inline:auto}

/* 锚点跳转时给固定顶栏让位 */
section[id],.work[id]{scroll-margin-top:calc(var(--bar) + 8px)}

/* ---------- 滚动进度条 ---------- */
.scrollbar{position:fixed;inset:0 0 auto;height:4px;z-index:60;background:transparent;pointer-events:none}
.scrollbar span{display:block;height:100%;width:0;background:var(--y);transition:width .1s linear}

/* ---------- 顶栏 ---------- */
.topbar{
  position:fixed;inset:0 0 auto;z-index:50;height:var(--bar);
  display:flex;align-items:center;gap:24px;
  padding:0 clamp(16px,3vw,32px);
  background:rgba(254,251,240,.86);
  backdrop-filter:saturate(1.4) blur(14px);
  -webkit-backdrop-filter:saturate(1.4) blur(14px);
  border-bottom:2px solid transparent;
  transition:border-color .3s var(--ease),transform .35s var(--ease);
}
.topbar.is-stuck{border-bottom-color:var(--ink)}
.topbar.is-hidden{transform:translateY(-100%)}

.brand{display:flex;align-items:baseline;gap:10px;flex:0 0 auto}
.brand b{font-size:22px;font-weight:900;letter-spacing:.02em}
.brand i{font-style:normal;font-size:12px;font-weight:700;color:var(--ink-2);letter-spacing:.06em}

.nav{margin-left:auto;display:flex;align-items:center;gap:4px;flex-wrap:wrap;justify-content:flex-end}
.nav a{
  position:relative;padding:7px 12px;border-radius:var(--r-pill);
  font-size:14px;font-weight:700;color:var(--ink-2);
  transition:background .2s var(--ease),color .2s var(--ease);
  white-space:nowrap;
}
.nav a:hover{background:var(--y-lt);color:var(--ink)}
.nav a.is-active{background:var(--y);color:var(--ink)}
.nav a[data-no]{font-variant-numeric:tabular-nums;padding:7px 10px}

.burger{display:none;margin-left:auto;width:44px;height:44px;border:2px solid var(--ink);
  background:var(--white);border-radius:14px;position:relative}
.burger span{position:absolute;left:11px;right:11px;height:2.5px;background:var(--ink);border-radius:2px;transition:.28s var(--ease)}
.burger span:nth-child(1){top:14px}
.burger span:nth-child(2){top:21px}
.burger span:nth-child(3){top:28px}
.burger[aria-expanded="true"] span:nth-child(1){top:21px;transform:rotate(45deg)}
.burger[aria-expanded="true"] span:nth-child(2){opacity:0}
.burger[aria-expanded="true"] span:nth-child(3){top:21px;transform:rotate(-45deg)}

/* ---------- 首页 ---------- */
.hero{position:relative;padding-top:var(--bar);background:var(--ink)}
.hero-stage{position:relative;max-width:1920px;margin-inline:auto;line-height:0}
.hero-stage>img{width:100%;height:auto}

/* 热区：默认隐形，悬停时轮廓 + 标签浮现 */
.hot{position:absolute;display:block;border-radius:var(--r-pill);outline:0 solid var(--ink);
  transition:background .22s var(--ease),outline-width .22s var(--ease),transform .22s var(--ease)}
.hot:hover,.hot:focus-visible{
  background:rgba(255,185,0,.22);
  outline:3px solid var(--ink);
  outline-offset:2px;
  transform:scale(1.03);
}
.hot-chip{display:grid;place-items:center}
.hot-chip span{
  opacity:0;transform:translateY(6px);
  background:var(--ink);color:var(--y);
  font-size:13px;font-weight:800;line-height:1;
  padding:8px 14px;border-radius:var(--r-pill);
  transition:.24s var(--ease);pointer-events:none;
}
.hot-chip:hover span,.hot-chip:focus-visible span{opacity:1;transform:none}
.hot-line{border-radius:10px}

.scroll-cue{
  position:absolute;left:50%;bottom:20px;transform:translateX(-50%);
  display:flex;flex-direction:column;align-items:center;gap:8px;
  font-size:12px;font-weight:800;letter-spacing:.12em;color:var(--white);
  opacity:.85;transition:opacity .2s
}
.scroll-cue:hover{opacity:1}
.scroll-cue span{background:rgba(17,17,17,.72);color:var(--white);
  padding:7px 14px;border-radius:var(--r-pill);backdrop-filter:blur(6px);
  -webkit-backdrop-filter:blur(6px)}
.scroll-cue i{width:2px;height:34px;background:linear-gradient(var(--y),transparent);animation:cue 1.6s infinite}
@keyframes cue{0%{transform:scaleY(.3);transform-origin:top}50%{transform:scaleY(1);transform-origin:top}51%{transform-origin:bottom}100%{transform:scaleY(.3);transform-origin:bottom}}

/* ---------- 区块通用 ---------- */
.sec{padding:clamp(64px,9vw,120px) 0}
.sec-head{margin-bottom:clamp(28px,4vw,48px)}
.sec-tag{
  display:inline-block;background:var(--ink);color:var(--y);
  font-size:12px;font-weight:900;letter-spacing:.16em;
  padding:6px 14px;border-radius:var(--r-pill);margin-bottom:14px;
}
.sec-head h2{font-size:clamp(30px,5vw,52px)}
.sec-head p{margin:10px 0 0;color:var(--ink-2);font-weight:600}

/* ---------- 简历 ---------- */
.shot{position:relative;margin:0;border:3px solid var(--ink);border-radius:var(--r-lg);
  overflow:hidden;background:var(--white);box-shadow:var(--shadow);line-height:0}
.shot>img{width:100%}

.facts{
  list-style:none;margin:22px 0 0;padding:0;
  display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:14px;
}
.facts li{
  background:var(--white);border:2.5px solid var(--ink);border-radius:var(--r-md);
  padding:16px 18px;display:flex;flex-direction:column;gap:4px;
  box-shadow:var(--shadow-sm);transition:transform .2s var(--ease),box-shadow .2s var(--ease)
}
.facts li:hover{transform:translate(-2px,-2px);box-shadow:6px 6px 0 var(--ink)}
.facts b{font-size:12px;font-weight:800;letter-spacing:.08em;color:var(--ink-2)}
.facts span,.facts a{font-size:16px;font-weight:800;word-break:break-all}
.facts a{border-bottom:2.5px solid var(--y);transition:background .2s}
.facts a:hover{background:var(--y)}

/* ---------- 目录卡片（热区） ---------- */
/* 六个板块：桌面一排六张，平板三张，手机两张 —— 与原稿目录一致 */
.toc{display:grid;gap:clamp(12px,1.8vw,24px);grid-template-columns:repeat(6,minmax(0,1fr))}
@media (max-width:1180px){.toc{grid-template-columns:repeat(3,minmax(0,1fr))}}
@media (max-width:600px){.toc{grid-template-columns:repeat(2,minmax(0,1fr))}}
.toc-card{
  position:relative;display:block;text-align:center;
  background:var(--white);border:3px solid var(--ink);border-radius:var(--r-lg);
  padding:clamp(26px,3.4vw,44px) 20px;
  box-shadow:var(--shadow);
  cursor:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='30' height='30' viewBox='0 0 30 30'%3E%3Cpath d='M6 2l16 12-7 1.2 4.2 8.2-3.2 1.6-4.1-8.3L6 22z' fill='%23fff' stroke='%23111' stroke-width='2' stroke-linejoin='round'/%3E%3C/svg%3E") 6 2, pointer;
  transition:transform .24s var(--ease),box-shadow .24s var(--ease),background .24s var(--ease);
}
.toc-card:hover,.toc-card:focus-visible{
  transform:translate(-4px,-4px);
  box-shadow:9px 9px 0 var(--ink);
  background:var(--y-lt);
  outline:none;
}
.toc-card:focus-visible{border-color:var(--y-dk)}
.toc-no{display:block;font-size:clamp(26px,3.4vw,38px);font-weight:900;color:var(--y);
  -webkit-text-stroke:1.5px var(--ink);letter-spacing:.02em;line-height:1;margin-bottom:10px}
.toc-name{display:block;font-size:17px;font-weight:900}
.toc-note{display:block;margin-top:6px;font-size:12px;font-weight:600;color:var(--ink-2)}
.toc-arrow{position:absolute;right:16px;top:16px;width:26px;height:26px;opacity:0;
  transform:translate(-4px,4px);transition:.24s var(--ease)}
.toc-card:hover .toc-arrow,.toc-card:focus-visible .toc-arrow{opacity:1;transform:none}

/* ---------- 作品板块 ---------- */
.work{padding:clamp(40px,6vw,80px) 0 clamp(48px,7vw,96px)}
.work:nth-child(odd){background:var(--white)}
.work:nth-child(even){background:var(--cream)}
/* 板块标题条：整幅吸顶，内容由内层 .wrap 控制宽度 */
.work-head{position:sticky;top:var(--bar);z-index:20;
  padding:16px 0 14px;margin-bottom:22px;border-bottom:2.5px solid var(--ink);
  background:var(--white)}
.work:nth-child(even) .work-head{background:var(--cream)}
.work-head .row{display:flex;align-items:baseline;gap:14px;flex-wrap:wrap}
.work-no{font-size:clamp(24px,3vw,32px);font-weight:900;color:var(--y);-webkit-text-stroke:1.4px var(--ink)}
.work-title{font-size:clamp(22px,3vw,32px)}
.work-en{font-size:11px;font-weight:800;letter-spacing:.18em;color:var(--ink-2)}
.work-note{margin:6px 0 0;font-size:13px;font-weight:700;color:var(--ink-2)}

/* 长图原样铺满：上限即导出原宽，不再二次缩放 */
.strip{display:block;line-height:0;width:100%;max-width:2560px;margin-inline:auto}
.piece{display:block;width:100%;height:auto}

/* 滚动淡入 */
.reveal{opacity:0;transform:translateY(26px);transition:opacity .6s var(--ease),transform .6s var(--ease)}
.reveal.is-in{opacity:1;transform:none}

/* ---------- 页脚 ---------- */
.foot{background:var(--ink);color:var(--white);padding:clamp(56px,8vw,104px) 0 28px;position:relative}
.foot::before{content:"";position:absolute;inset:0 0 auto;height:6px;background:var(--y)}
.foot-main{display:flex;flex-wrap:wrap;gap:clamp(28px,5vw,80px);align-items:flex-start;justify-content:space-between}
.foot h2{font-size:clamp(30px,5.4vw,58px);letter-spacing:-.03em}
.foot h2 em{font-style:normal;color:var(--y)}
.foot-links{display:flex;flex-wrap:wrap;gap:14px}
.foot-links a{
  display:flex;flex-direction:column;gap:6px;
  background:rgba(255,255,255,.06);border:2.5px solid rgba(255,255,255,.28);
  border-radius:var(--r-md);padding:18px 22px;min-width:230px;
  transition:.24s var(--ease)
}
.foot-links a:hover{background:var(--y);border-color:var(--y);color:var(--ink);transform:translateY(-3px)}
.foot-links b{font-size:12px;font-weight:800;letter-spacing:.1em;opacity:.75}
.foot-links span{font-size:17px;font-weight:900;word-break:break-all}
.foot-bar{margin-top:clamp(40px,6vw,72px);padding-top:20px;border-top:1px solid rgba(255,255,255,.18);
  display:flex;flex-wrap:wrap;gap:14px;align-items:center;justify-content:space-between;
  font-size:13px;color:rgba(255,255,255,.7)}
.copy-btn{
  background:transparent;border:2px solid rgba(255,255,255,.35);color:var(--white);
  border-radius:var(--r-pill);padding:9px 18px;font-size:13px;font-weight:800;transition:.22s var(--ease)
}
.copy-btn:hover{background:var(--y);border-color:var(--y);color:var(--ink)}

/* ---------- 返回顶部 ---------- */
.totop{
  position:fixed;right:clamp(16px,3vw,30px);bottom:clamp(16px,3vw,30px);z-index:40;
  width:52px;height:52px;border:3px solid var(--ink);border-radius:var(--r-pill);
  background:var(--y);display:grid;place-items:center;box-shadow:var(--shadow-sm);
  transition:.24s var(--ease)
}
.totop:hover{transform:translate(-2px,-2px);box-shadow:6px 6px 0 var(--ink)}
.totop svg{width:24px;height:24px;fill:var(--ink)}

/* ---------- 提示 ---------- */
.toast{position:fixed;left:50%;bottom:34px;transform:translate(-50%,20px);z-index:95;
  background:var(--ink);color:var(--y);font-size:14px;font-weight:800;
  padding:12px 22px;border-radius:var(--r-pill);box-shadow:var(--shadow-sm);
  opacity:0;pointer-events:none;transition:.26s var(--ease)}
.toast.is-on{opacity:1;transform:translate(-50%,0)}

/* ---------- 响应式 ---------- */
@media (max-width:900px){
  :root{--bar:58px}
  .wrap{width:min(1240px,100% - 32px)}
  .nav{
    position:fixed;inset:var(--bar) 0 auto;margin:0;
    flex-direction:column;align-items:stretch;gap:2px;
    background:var(--cream);border-bottom:3px solid var(--ink);
    padding:12px 16px 20px;max-height:calc(100vh - var(--bar));overflow:auto;
    transform:translateY(-12px);opacity:0;pointer-events:none;
    transition:.26s var(--ease)
  }
  .nav.is-open{transform:none;opacity:1;pointer-events:auto}
  .nav a{padding:13px 16px;font-size:16px;border-radius:14px;text-align:left}
  .burger{display:block}
  .hot-chip span{font-size:11px;padding:6px 10px}
  .work-head{position:static}
  .foot-links a{min-width:100%}
  .scroll-cue{display:none}
}

@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{animation-duration:.001ms!important;transition-duration:.001ms!important}
  .reveal{opacity:1;transform:none}
}

/* 打印：只留作品 */
@media print{
  .topbar,.scrollbar,.totop,.toast,.scroll-cue,.toc,.hot{display:none!important}
  body{background:#fff}
  .work-head{position:static;background:#fff}
}