/* 张黑作品集 · 设计系统
   纸墨基调：暖纸底 / 深墨字 / 朱砂点缀；支持浅色、sepia、深色三档主题 */
:root {
  --paper: #f6f1e6;
  --paper-2: #efe7d7;
  --card: #fffcf5;
  --ink: #24201b;
  --ink-2: #5c534a;
  --ink-3: #8b8175;
  --line: rgba(36, 32, 27, .13);
  --line-2: rgba(36, 32, 27, .07);
  --accent: #9c3b21;
  --accent-soft: rgba(156, 59, 33, .1);
  --teal: #2f5d62;
  --shadow: 0 1px 2px rgba(36, 32, 27, .06), 0 8px 24px rgba(36, 32, 27, .08);
  --shadow-lg: 0 2px 6px rgba(36, 32, 27, .08), 0 18px 44px rgba(36, 32, 27, .14);
  --serif: "Songti SC", "STSong", "Noto Serif SC", "Source Han Serif SC", SimSun, serif;
  --sans: -apple-system, "PingFang SC", "Microsoft YaHei", "Hiragino Sans GB", sans-serif;
  --r: 14px;
  --r-s: 9px;
  --head-h: 58px;
}
html[data-theme="sepia"] {
  --paper: #f1e5cf; --paper-2: #e8dabf; --card: #f8f0e0;
  --ink: #2f2718; --ink-2: #6b5c42; --ink-3: #93835f;
  --line: rgba(47, 39, 24, .16); --line-2: rgba(47, 39, 24, .08);
  --accent: #8c4a1f; --shadow: 0 8px 24px rgba(47, 39, 24, .12);
}
html[data-theme="dark"] {
  --paper: #17171a; --paper-2: #121215; --card: #201f23;
  --ink: #e8e4dc; --ink-2: #a9a49b; --ink-3: #7b766e;
  --line: rgba(232, 228, 220, .14); --line-2: rgba(232, 228, 220, .07);
  --accent: #d1683f; --accent-soft: rgba(209, 104, 63, .14); --teal: #6fa3a8;
  --shadow: 0 1px 2px rgba(0, 0, 0, .5), 0 12px 30px rgba(0, 0, 0, .4);
  --shadow-lg: 0 2px 8px rgba(0, 0, 0, .55), 0 22px 50px rgba(0, 0, 0, .5);
}

* { box-sizing: border-box }
/* 组件常用 display:grid/flex，会盖掉 hidden 属性的默认 display:none，这里统一兜底 */
[hidden] { display: none !important }
html, body { margin: 0; padding: 0 }
body {
  background: var(--paper); color: var(--ink);
  font-family: var(--sans); font-size: 15px; line-height: 1.6;
  -webkit-font-smoothing: antialiased; overflow-x: hidden;
  transition: background .25s ease, color .25s ease;
}
html { scroll-behavior: smooth }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto } * { animation-duration: .01ms !important; transition-duration: .01ms !important } }
a { color: inherit; text-decoration: none }
img { display: block; max-width: 100% }
button, input, select, textarea { font: inherit; color: inherit }
::selection { background: var(--accent-soft); color: var(--ink) }

.wrap { max-width: 1180px; margin: 0 auto; padding: 0 18px }
.wrap-narrow { max-width: 860px; margin: 0 auto; padding: 0 18px }

/* ---------- 顶栏 ---------- */
.topbar {
  position: sticky; top: 0; z-index: 40;
  background: var(--paper); background: color-mix(in srgb, var(--paper) 88%, transparent);
  backdrop-filter: saturate(1.4) blur(12px);
  border-bottom: 1px solid var(--line-2);
}
.topbar-in { height: var(--head-h); display: flex; align-items: center; gap: 14px }
.brand { display: flex; align-items: center; gap: 10px; font-family: var(--serif); font-size: 19px; letter-spacing: .5px }
.brand .seal {
  width: 30px; height: 30px; border-radius: 7px; background: var(--accent); color: #fff;
  display: grid; place-items: center; font-size: 15px; font-family: var(--serif); line-height: 1;
  box-shadow: 0 2px 8px rgba(156, 59, 33, .35);
}
.brand small { font-family: var(--sans); font-size: 11px; color: var(--ink-3); letter-spacing: 2px; display: block; margin-top: -2px }
.spacer { flex: 1 }
.nav-links { display: flex; gap: 4px; align-items: center }
.nav-links a, .btn {
  padding: 7px 13px; border-radius: 999px; font-size: 13.5px; color: var(--ink-2);
  border: 1px solid transparent; transition: .18s ease; white-space: nowrap; cursor: pointer;
}
.nav-links a:hover, .btn:hover { color: var(--ink); background: var(--paper-2) }
.nav-links a.on { color: var(--accent); background: var(--accent-soft) }
.btn { display: inline-flex; align-items: center; gap: 6px; background: var(--card); border-color: var(--line) }
.btn:hover { border-color: var(--ink-3) }
.btn.primary { background: var(--accent); color: #fff; border-color: transparent }
.btn.primary:hover { background: color-mix(in srgb, var(--accent) 88%, #000); color: #fff }
.btn.ghost { background: transparent }
.btn.sm { padding: 5px 11px; font-size: 12.5px }
.btn.icon { padding: 7px 9px }
.btn:disabled { opacity: .45; cursor: not-allowed }

/* ---------- 首页 hero ---------- */
.hero { padding: 40px 0 26px; position: relative }
.hero-grid { display: grid; grid-template-columns: 1.1fr .9fr; gap: 34px; align-items: center }
.hero h1 { font-family: var(--serif); font-size: clamp(30px, 4.6vw, 46px); line-height: 1.22; margin: 0 0 14px; letter-spacing: 1px }
.hero h1 em { font-style: normal; color: var(--accent) }
.hero p.lead { color: var(--ink-2); font-size: 15.5px; max-width: 46ch; margin: 0 0 20px }
.hero .meta { display: flex; flex-wrap: wrap; gap: 10px 22px; color: var(--ink-3); font-size: 13px }
.hero .meta b { font-family: var(--serif); font-size: 21px; color: var(--ink); font-weight: 400; margin-right: 4px }
.hero-art { position: relative; height: 320px }
.hero-art .bk {
  position: absolute; width: 128px; aspect-ratio: 2/3; border-radius: 6px; overflow: hidden;
  box-shadow: var(--shadow-lg); border: 1px solid var(--line-2);
  transition: transform .5s cubic-bezier(.2, .7, .3, 1);
}
.hero-art .bk img { width: 100%; height: 100%; object-fit: cover }
.hero-art .bk:nth-child(1) { left: 4%; top: 26px; transform: rotate(-7deg) }
.hero-art .bk:nth-child(2) { left: 32%; top: 0; transform: rotate(3deg); z-index: 2 }
.hero-art .bk:nth-child(3) { left: 60%; top: 34px; transform: rotate(-3deg) }
.hero-art:hover .bk:nth-child(1) { transform: rotate(-11deg) translateY(-8px) }
.hero-art:hover .bk:nth-child(2) { transform: rotate(0deg) translateY(-14px) }
.hero-art:hover .bk:nth-child(3) { transform: rotate(6deg) translateY(-6px) }
@media (max-width: 860px) {
  .hero-grid { grid-template-columns: 1fr }
  .hero-art { height: 210px; order: -1 }
  .hero-art .bk { width: 92px }
  .hero { padding-top: 22px }
}
@media (max-width: 560px) {
  .topbar-in { gap: 8px }
  .brand { font-size: 17px; white-space: nowrap }
  .brand small { display: none }
  .nav-links a, .btn { padding: 6px 10px; font-size: 13px }
}
@media (max-width: 380px) {
  .topbar-in { gap: 4px }
  .brand { font-size: 15.5px; gap: 7px; min-width: 0 }
  .brand .seal { width: 26px; height: 26px; font-size: 13px; flex: none }
  .nav-links { gap: 2px }
  .nav-links a, .btn { padding: 5px 7px; font-size: 12.5px }
}

/* ---------- 工具条 ---------- */
.toolbar {
  position: sticky; top: var(--head-h); z-index: 30;
  background: var(--paper); background: color-mix(in srgb, var(--paper) 92%, transparent);
  backdrop-filter: blur(10px); border-top: 1px solid var(--line-2); border-bottom: 1px solid var(--line);
}
.toolbar-in { display: flex; align-items: center; gap: 10px; padding-top: 10px; padding-bottom: 10px; flex-wrap: wrap }
.chips { display: flex; gap: 6px; overflow-x: auto; scrollbar-width: none; flex: 1; min-width: 200px }
.chips::-webkit-scrollbar { display: none }
.chip {
  padding: 6px 13px; border-radius: 999px; font-size: 13px; color: var(--ink-2);
  background: var(--card); border: 1px solid var(--line); cursor: pointer; white-space: nowrap; transition: .16s;
}
.chip:hover { color: var(--ink); border-color: var(--ink-3) }
.chip.on { background: var(--ink); color: var(--paper); border-color: var(--ink) }
.chip .n { opacity: .55; font-size: 11.5px; margin-left: 4px }
.search { position: relative; display: flex; align-items: center }
.search input {
  width: 210px; padding: 8px 12px 8px 32px; border-radius: 999px; border: 1px solid var(--line);
  background: var(--card); outline: none; font-size: 13.5px; transition: .18s;
}
.search input:focus { border-color: var(--ink-3); width: 260px }
.search svg { position: absolute; left: 11px; width: 15px; height: 15px; color: var(--ink-3); pointer-events: none }
@media (max-width: 620px) {
  .search input, .search input:focus { width: 100% }
  .search { flex: 1; min-width: 160px }
  .chips { order: 3; flex-basis: 100%; flex-wrap: wrap; overflow: visible }
}

/* ---------- 作品网格 ---------- */
.sec { padding: 26px 0 8px }
.sec-h { display: flex; align-items: baseline; gap: 12px; margin: 0 0 16px }
.sec-h h2 { font-family: var(--serif); font-size: 21px; margin: 0; font-weight: 400; letter-spacing: .5px }
.sec-h .hint { color: var(--ink-3); font-size: 12.5px }
.sec-h .rule { flex: 1; height: 1px; background: var(--line); }

.grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(168px, 1fr)); gap: 22px 18px }
@media (max-width: 520px) { .grid { grid-template-columns: repeat(auto-fill, minmax(140px, 1fr)); gap: 18px 13px } }

.card { position: relative; display: flex; flex-direction: column; cursor: pointer }
.cover {
  position: relative; aspect-ratio: 2/3; border-radius: 5px; overflow: hidden; background: var(--paper-2);
  box-shadow: var(--shadow); transition: transform .28s cubic-bezier(.2, .7, .3, 1), box-shadow .28s;
  border: 1px solid var(--line-2);
}
.cover img { width: 100%; height: 100%; object-fit: cover; animation: coverIn .5s ease both }
@keyframes coverIn { from { opacity: 0 } to { opacity: 1 } }
/* ?static=1：关掉入场动画，页面直接呈现终态（也便于截图核对） */
html.hd-static .cover img, html.hd-static .fade { animation: none }
.cover::after {
  content: ''; position: absolute; inset: 0; pointer-events: none;
  background: linear-gradient(105deg, rgba(255, 255, 255, .16), transparent 42%);
  opacity: 0; transition: opacity .3s;
}
.card:hover .cover { transform: translateY(-6px); box-shadow: var(--shadow-lg) }
.card:hover .cover::after { opacity: 1 }
.card .title {
  font-family: var(--serif); font-size: 15.5px; margin: 11px 0 2px; line-height: 1.35;
  display: -webkit-box; -webkit-line-clamp: 1; -webkit-box-orient: vertical; overflow: hidden;
}
.card .sub { font-size: 12px; color: var(--ink-3); margin-bottom: 7px; min-height: 17px;
  display: -webkit-box; -webkit-line-clamp: 1; -webkit-box-orient: vertical; overflow: hidden }
.card .tags { display: flex; gap: 6px; align-items: center; flex-wrap: wrap; font-size: 11px; color: var(--ink-3) }
.card .tags .cat { color: var(--accent); background: var(--accent-soft); padding: 1px 7px; border-radius: 999px }
.card .tags .dot { width: 3px; height: 3px; border-radius: 50%; background: var(--ink-3); opacity: .6; flex: none }
.card .go {
  position: absolute; left: 0; right: 0; bottom: 0; padding: 9px 12px; font-size: 12.5px; color: #fff;
  background: linear-gradient(transparent, rgba(0, 0, 0, .62)); opacity: 0; transition: opacity .22s;
  display: flex; align-items: center; gap: 6px; pointer-events: none;
}
.card:hover .go { opacity: 1 }
.ribbon {
  position: absolute; top: 9px; left: 9px; z-index: 2; font-size: 11px; padding: 2px 8px; border-radius: 999px;
  background: rgba(20, 16, 12, .58); color: #fff8ef; backdrop-filter: blur(4px);
}
.pct { position: absolute; right: 9px; top: 9px; z-index: 2; font-size: 11px; padding: 2px 7px; border-radius: 999px; background: var(--accent); color: #fff }

/* 继续阅读条 */
.resume {
  display: flex; align-items: center; gap: 14px; padding: 12px 16px; margin-bottom: 22px;
  background: var(--card); border: 1px solid var(--line); border-radius: var(--r); box-shadow: var(--shadow);
}
.resume img { width: 38px; aspect-ratio: 2/3; border-radius: 3px; object-fit: cover }
.resume .t { font-family: var(--serif); font-size: 15px }
.resume .d { font-size: 12px; color: var(--ink-3) }
.resume .bar { flex: 1; height: 4px; background: var(--paper-2); border-radius: 2px; overflow: hidden; min-width: 40px }
.resume .bar i { display: block; height: 100%; background: var(--accent) }

/* 系列分组 */
.series { margin-bottom: 26px }
.series-h { display: flex; align-items: center; gap: 10px; margin: 0 0 12px }
.series-h h3 { font-family: var(--serif); font-size: 17px; margin: 0; font-weight: 400 }
.series-h .rule { flex: 1; height: 1px; background: var(--line-2) }
.series-h .n { font-size: 12px; color: var(--ink-3) }
.sgrid { display: grid; grid-template-columns: repeat(auto-fill, minmax(132px, 1fr)); gap: 16px 14px }

/* 空态 */
.empty { text-align: center; padding: 70px 20px; color: var(--ink-3) }
.empty h3 { font-family: var(--serif); color: var(--ink-2); font-weight: 400; margin: 0 0 6px }

/* ---------- 页脚 ---------- */
.foot { margin-top: 46px; border-top: 1px solid var(--line); padding: 26px 0 40px; color: var(--ink-3); font-size: 13px }
.foot-in { display: flex; gap: 18px; align-items: center; flex-wrap: wrap }
.foot a:hover { color: var(--accent) }

/* ---------- 弹层 / 提示 ---------- */
.toast {
  position: fixed; left: 50%; bottom: 26px; transform: translate(-50%, 14px); z-index: 999;
  background: var(--ink); color: var(--paper); padding: 9px 18px; border-radius: 999px; font-size: 13.5px;
  opacity: 0; pointer-events: none; transition: .25s ease; max-width: 84vw; text-align: center;
}
.toast.on { opacity: 1; transform: translate(-50%, 0) }
.mask { position: fixed; inset: 0; background: rgba(20, 16, 12, .48); opacity: 0; pointer-events: none; transition: opacity .22s; z-index: 90 }
.mask.on { opacity: 1; pointer-events: auto }

/* 表单 */
.f { display: grid; gap: 14px }
.f-row { display: grid; gap: 5px }
.f-row.two { grid-template-columns: 1fr 1fr; gap: 12px }
@media (max-width: 560px) { .f-row.two { grid-template-columns: 1fr } }
label.lb { font-size: 12.5px; color: var(--ink-2) }
input.tf, select.tf, textarea.tf {
  width: 100%; padding: 9px 11px; border-radius: var(--r-s); border: 1px solid var(--line);
  background: var(--card); outline: none; transition: border-color .16s; font-size: 14px;
}
input.tf:focus, select.tf:focus, textarea.tf:focus { border-color: var(--accent) }
textarea.tf { resize: vertical; min-height: 92px; line-height: 1.6 }
.note { font-size: 12px; color: var(--ink-3); line-height: 1.6 }

/* 通用淡入 */
.rise { animation: rise .5s cubic-bezier(.2, .7, .3, 1) both }
@keyframes rise { from { opacity: 0; transform: translateY(14px) } to { opacity: 1; transform: none } }
.fade { animation: fade .6s ease both }
@keyframes fade { from { opacity: 0 } to { opacity: 1 } }