/* ==========================================================
   迪研记 DiyLab — 站点样式
   深色工业风为默认主题，light 由 [data-theme="light"] 覆盖
   ========================================================== */

:root {
  --bg: #0c0f14;
  --bg-alt: #11161d;
  --surface: #151b23;
  --surface-2: #1c242e;
  --border: #263140;
  --text: #e8eef6;
  --text-soft: #a9b6c6;
  --muted: #7b8a9c;
  --accent: #ffb02e;
  --accent-soft: rgba(255, 176, 46, .14);
  --cyan: #45d0e0;
  --green: #56d364;
  --radius: 14px;
  --radius-sm: 9px;
  --shadow: 0 10px 30px rgba(0, 0, 0, .35);
  --shadow-hover: 0 18px 44px rgba(0, 0, 0, .45);
  --maxw: 1180px;
  --font: "PingFang SC", "HarmonyOS Sans SC", "Microsoft YaHei", "Noto Sans SC", system-ui, -apple-system, "Segoe UI", sans-serif;
  --mono: "JetBrains Mono", "Cascadia Code", "SFMono-Regular", Consolas, monospace;
}

[data-theme="light"] {
  --bg: #f5f7fa;
  --bg-alt: #ffffff;
  --surface: #ffffff;
  --surface-2: #f0f3f7;
  --border: #dfe5ed;
  --text: #17202b;
  --text-soft: #4b5867;
  --muted: #6d7b8c;
  --accent: #c97a00;
  --accent-soft: rgba(201, 122, 0, .12);
  --cyan: #0e8fa8;
  --shadow: 0 10px 26px rgba(20, 35, 60, .08);
  --shadow-hover: 0 18px 40px rgba(20, 35, 60, .14);
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font);
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
  transition: background .3s ease, color .3s ease;
}

img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
h1, h2, h3, h4 { line-height: 1.3; margin: 0 0 .6em; font-weight: 700; letter-spacing: -.01em; }
p { margin: 0 0 1em; }
code { font-family: var(--mono); font-size: .92em; }

.container { width: 100%; max-width: var(--maxw); margin: 0 auto; padding: 0 22px; }
.sr-only { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); }

/* ---------- 顶部导航 ---------- */
.site-header {
  position: sticky; top: 0; z-index: 50;
  background: color-mix(in srgb, var(--bg) 86%, transparent);
  backdrop-filter: saturate(160%) blur(12px);
  border-bottom: 1px solid var(--border);
}
.nav { display: flex; align-items: center; gap: 18px; height: 66px; }
.logo { display: flex; align-items: center; gap: 10px; font-weight: 800; font-size: 1.06rem; letter-spacing: .02em; }
.logo-mark {
  width: 34px; height: 34px; display: grid; place-items: center;
  border-radius: 10px; color: #0b0e13; background: var(--accent);
  box-shadow: 0 0 0 1px var(--border), 0 6px 16px var(--accent-soft);
}
.logo-sub { font-size: .74rem; color: var(--muted); font-weight: 600; letter-spacing: .16em; text-transform: uppercase; }
.nav-links { display: flex; gap: 4px; margin-left: auto; }
.nav-links a {
  padding: 8px 14px; border-radius: 999px; font-size: .94rem; font-weight: 600;
  color: var(--text-soft); transition: .2s;
}
.nav-links a:hover { color: var(--text); background: var(--surface-2); }
.nav-links a.active { color: var(--accent); background: var(--accent-soft); }
.icon-btn {
  width: 38px; height: 38px; display: grid; place-items: center; cursor: pointer;
  border-radius: 10px; border: 1px solid var(--border); background: var(--surface);
  color: var(--text-soft); transition: .2s; flex: none;
}
.icon-btn:hover { color: var(--accent); border-color: var(--accent); transform: translateY(-1px); }
.nav-toggle { display: none; }

/* ---------- 通用区块 ---------- */
.section { padding: 84px 0; }
.section-alt { background: var(--bg-alt); border-block: 1px solid var(--border); }
.section-head { max-width: 660px; margin-bottom: 40px; }
.eyebrow {
  display: inline-block; font-size: .76rem; font-weight: 700; letter-spacing: .18em;
  text-transform: uppercase; color: var(--accent); margin-bottom: 12px;
}
.section-title { font-size: clamp(1.6rem, 3.4vw, 2.3rem); }
.section-desc { color: var(--text-soft); margin: 0; font-size: 1.02rem; }

.btn {
  display: inline-flex; align-items: center; gap: 8px; padding: 12px 22px;
  border-radius: 999px; font-weight: 700; font-size: .95rem; border: 1px solid transparent;
  cursor: pointer; transition: .22s ease; background: var(--accent); color: #0b0e13;
}
.btn:hover { transform: translateY(-2px); box-shadow: 0 10px 24px var(--accent-soft); }
.btn-ghost { background: transparent; color: var(--text); border-color: var(--border); }
.btn-ghost:hover { border-color: var(--accent); color: var(--accent); box-shadow: none; background: var(--accent-soft); }

/* ---------- Hero ---------- */
.hero { position: relative; overflow: hidden; padding: 96px 0 80px; }
.hero::before {
  content: ""; position: absolute; inset: 0; z-index: 0; pointer-events: none;
  background-image: linear-gradient(var(--border) 1px, transparent 1px), linear-gradient(90deg, var(--border) 1px, transparent 1px);
  background-size: 52px 52px;
  mask-image: radial-gradient(ellipse 80% 60% at 50% 0%, #000 20%, transparent 78%);
  opacity: .55;
}
.hero::after {
  content: ""; position: absolute; z-index: 0; pointer-events: none;
  width: 620px; height: 620px; right: -180px; top: -220px; border-radius: 50%;
  background: radial-gradient(circle, var(--accent-soft), transparent 68%);
}
.hero .container { position: relative; z-index: 1; }
.hero-grid { display: grid; grid-template-columns: 1.15fr .85fr; gap: 52px; align-items: center; }
.badge {
  display: inline-flex; align-items: center; gap: 8px; padding: 7px 14px; margin-bottom: 22px;
  border: 1px solid var(--border); border-radius: 999px; background: var(--surface);
  font-size: .84rem; color: var(--text-soft);
}
.dot { width: 7px; height: 7px; border-radius: 50%; background: var(--green); box-shadow: 0 0 0 4px rgba(86, 211, 100, .18); }
.hero h1 { font-size: clamp(2.3rem, 5.4vw, 3.9rem); letter-spacing: -.03em; margin-bottom: 18px; }
.hero h1 em { font-style: normal; color: var(--accent); }
.hero-lead { font-size: 1.12rem; color: var(--text-soft); max-width: 54ch; margin-bottom: 30px; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 14px; margin-bottom: 38px; }
.hero-stats { display: flex; flex-wrap: wrap; gap: 34px; padding-top: 26px; border-top: 1px dashed var(--border); }
.stat b { display: block; font-size: 1.9rem; line-height: 1.2; font-family: var(--mono); color: var(--accent); }
.stat span { font-size: .88rem; color: var(--muted); }
.hero-art { filter: drop-shadow(0 24px 46px rgba(0, 0, 0, .4)); }

/* ---------- 卡片 ---------- */
.card-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(320px, 1fr)); gap: 26px; }
.card {
  display: flex; flex-direction: column; overflow: hidden;
  background: var(--surface); border: 1px solid var(--border);
  border-radius: var(--radius); box-shadow: var(--shadow);
  transition: transform .25s ease, box-shadow .25s ease, border-color .25s ease;
}
.card:hover { transform: translateY(-6px); box-shadow: var(--shadow-hover); border-color: color-mix(in srgb, var(--accent) 45%, var(--border)); }
.chip-bili { left: auto; right: 12px; background: #fb7299; color: #fff; }
.card-cover { position: relative; aspect-ratio: 16 / 10; background: var(--surface-2); overflow: hidden; }
.card-cover img { width: 100%; height: 100%; object-fit: cover; transition: transform .5s ease; }
.card:hover .card-cover img { transform: scale(1.05); }
.chip {
  position: absolute; left: 12px; top: 12px; z-index: 2;
  padding: 5px 11px; border-radius: 999px; font-size: .76rem; font-weight: 700;
  background: rgba(8, 11, 16, .72); color: #fff; backdrop-filter: blur(6px); letter-spacing: .03em;
}
.card-body { padding: 20px 22px 22px; display: flex; flex-direction: column; gap: 10px; flex: 1; }
.card-meta { display: flex; gap: 14px; font-size: .8rem; color: var(--muted); font-family: var(--mono); }
.card-title { font-size: 1.16rem; margin: 0; }
.card-title a:hover { color: var(--accent); }
.card-excerpt { color: var(--text-soft); font-size: .94rem; margin: 0; flex: 1; }
.tags { display: flex; flex-wrap: wrap; gap: 7px; }
.tag {
  font-size: .76rem; padding: 3px 9px; border-radius: 6px; font-family: var(--mono);
  background: var(--surface-2); color: var(--text-soft); border: 1px solid var(--border);
}
.tag-accent { color: var(--accent); border-color: var(--accent-soft); background: var(--accent-soft); }

/* ---------- 领域 ---------- */
.domain-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: 22px; }
.domain {
  padding: 30px 26px; border-radius: var(--radius); border: 1px solid var(--border);
  background: var(--surface); transition: .25s;
}
.domain:hover { transform: translateY(-4px); border-color: color-mix(in srgb, var(--accent) 45%, var(--border)); }
.domain-icon { width: 46px; height: 46px; border-radius: 12px; display: grid; place-items: center; background: var(--accent-soft); color: var(--accent); margin-bottom: 16px; }
.domain h3 { font-size: 1.12rem; margin-bottom: 8px; }
.domain p { color: var(--text-soft); margin: 0; font-size: .95rem; }
.domain ul { margin: 14px 0 0; padding-left: 18px; color: var(--muted); font-size: .9rem; }
.domain li { margin-bottom: 4px; }

/* ---------- 时间线 / 动态 ---------- */
.timeline { position: relative; padding-left: 26px; }
.timeline::before { content: ""; position: absolute; left: 6px; top: 6px; bottom: 6px; width: 2px; background: var(--border); }
.tl-item { position: relative; padding-bottom: 26px; }
.tl-item::before {
  content: ""; position: absolute; left: -26px; top: 9px; width: 10px; height: 10px;
  border-radius: 50%; background: var(--accent); box-shadow: 0 0 0 4px var(--accent-soft);
}
.tl-date { font-family: var(--mono); font-size: .8rem; color: var(--muted); }
.tl-title { font-weight: 700; margin: 2px 0 2px; }
.tl-desc { color: var(--text-soft); font-size: .93rem; margin: 0; }
.timeline-scroll { max-height: 620px; overflow-y: auto; padding-right: 10px; }
.timeline-scroll::-webkit-scrollbar { width: 6px; }
.timeline-scroll::-webkit-scrollbar-thumb { background: var(--border); border-radius: 3px; }

/* 制作日志列表（详情页侧栏） */
.log-list { margin: 0; font-size: .92rem; }
.log-list div { display: flex; gap: 10px; padding: 8px 0; border-bottom: 1px dashed var(--border); }
.log-list div:last-child { border-bottom: 0; }
.log-list time { font-family: var(--mono); font-size: .8rem; color: var(--muted); flex: none; }
.log-list span { color: var(--text-soft); }
.tl-video {
  display: inline-block; margin-left: 6px; padding: 1px 7px; border-radius: 999px;
  font-size: .68rem; font-weight: 700; vertical-align: middle;
  background: #fb7299; color: #fff;
}
.tl-title a { color: inherit; }
.tl-title a:hover { color: var(--accent); }

/* 相关视频（B站） */
.video-list { display: flex; flex-direction: column; gap: 2px; }
.video-list a {
  display: grid; grid-template-columns: auto 1fr auto; align-items: baseline; gap: 10px;
  padding: 9px 0; border-bottom: 1px dashed var(--border); color: var(--text-soft); font-size: .92rem;
}
.video-list a:last-child { border-bottom: 0; }
.video-list a:hover { color: var(--accent); }
.video-list time { font-family: var(--mono); font-size: .78rem; color: var(--muted); }
.video-list em { font-style: normal; font-family: var(--mono); font-size: .78rem; color: var(--muted); }

/* ---------- 筛选栏 ---------- */
.filters { display: flex; flex-wrap: wrap; gap: 10px; margin-bottom: 32px; }
.filter {
  cursor: pointer; padding: 8px 16px; border-radius: 999px; font-size: .9rem; font-weight: 600;
  border: 1px solid var(--border); background: var(--surface); color: var(--text-soft); transition: .2s;
}
.filter:hover { color: var(--text); border-color: var(--accent); }
.filter.active { background: var(--accent); border-color: var(--accent); color: #0b0e13; }
.result-count { color: var(--muted); font-size: .9rem; font-family: var(--mono); margin-left: 4px; }
.empty { padding: 60px 0; text-align: center; color: var(--muted); }

/* ---------- 详情页 ---------- */
.page-head { padding: 54px 0 8px; }
.crumb { font-size: .88rem; color: var(--muted); margin-bottom: 16px; }
.crumb a:hover { color: var(--accent); }
.detail-layout { display: grid; grid-template-columns: minmax(0, 1fr) 320px; gap: 44px; align-items: start; }
.detail-cover { border-radius: var(--radius); overflow: hidden; border: 1px solid var(--border); margin-bottom: 30px; }
.prose h2 { font-size: 1.35rem; margin-top: 40px; padding-left: 12px; border-left: 3px solid var(--accent); }
.prose h3 { font-size: 1.06rem; margin-top: 26px; color: var(--accent); }
.prose p, .prose li { color: var(--text-soft); }
.prose ul { padding-left: 20px; }
.prose li { margin-bottom: 8px; }
.prose blockquote {
  margin: 24px 0; padding: 14px 18px; border-left: 3px solid var(--cyan);
  background: var(--surface); border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  color: var(--text-soft); font-size: .95rem;
}
.prose img { border-radius: var(--radius-sm); border: 1px solid var(--border); }
.side-card { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); padding: 22px; margin-bottom: 22px; }
.side-card h3 { font-size: 1rem; margin-bottom: 14px; display: flex; align-items: center; gap: 8px; }
.spec-list { margin: 0; font-size: .92rem; }
.spec-list div { display: flex; justify-content: space-between; gap: 14px; padding: 9px 0; border-bottom: 1px dashed var(--border); }
.spec-list div:last-child { border-bottom: 0; }
.spec-list dt { color: var(--muted); flex: none; }
.spec-list dd { margin: 0; text-align: right; font-weight: 600; }
.bom { margin: 0; font-size: .9rem; }
.bom-row { display: flex; justify-content: space-between; gap: 12px; padding: 8px 0; border-bottom: 1px dashed var(--border); }
.bom-row:last-child { border-bottom: 0; }
.bom-row .qty { font-family: var(--mono); color: var(--accent); flex: none; }
.bom-row .note { display: block; color: var(--muted); font-size: .8rem; }
.pager { display: flex; justify-content: space-between; gap: 16px; margin-top: 48px; padding-top: 26px; border-top: 1px solid var(--border); }
.pager a { max-width: 46%; font-weight: 600; color: var(--text-soft); }
.pager a:hover { color: var(--accent); }
.pager small { display: block; font-family: var(--mono); font-size: .76rem; color: var(--muted); font-weight: 400; }

/* ---------- 关于页 ---------- */
.about-grid { display: grid; grid-template-columns: 1fr 1.25fr; gap: 46px; align-items: start; }
.contact-list { list-style: none; margin: 18px 0 0; padding: 0; font-size: .95rem; }
.contact-list li { display: flex; gap: 10px; align-items: center; padding: 9px 0; border-bottom: 1px dashed var(--border); color: var(--text-soft); }
.contact-list b { color: var(--text); }
.skills { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 12px; }

/* ---------- CTA ---------- */
.cta-box {
  text-align: center; padding: 56px 30px; border-radius: 20px;
  border: 1px solid var(--border); background:
    radial-gradient(ellipse at top, var(--accent-soft), transparent 70%), var(--surface);
}

/* ---------- 页脚 ---------- */
.site-footer { border-top: 1px solid var(--border); padding: 46px 0 28px; background: var(--bg-alt); }
.footer-grid { display: grid; grid-template-columns: 1.4fr 1fr 1fr; gap: 34px; }
.footer-grid h4 { font-size: .95rem; margin-bottom: 14px; }
.footer-grid ul { list-style: none; margin: 0; padding: 0; font-size: .92rem; }
.footer-grid li { margin-bottom: 8px; color: var(--text-soft); }
.footer-grid a:hover { color: var(--accent); }
.footer-bottom {
  margin-top: 34px; padding-top: 20px; border-top: 1px solid var(--border);
  display: flex; flex-wrap: wrap; gap: 10px; justify-content: space-between;
  font-size: .85rem; color: var(--muted);
}
.footer-bottom a { color: inherit; transition: .2s; }
.footer-bottom a:hover { color: var(--accent); }

/* ---------- 返回顶部 ---------- */
.to-top {
  position: fixed; right: 22px; bottom: 22px; z-index: 60; opacity: 0; pointer-events: none;
  transition: .25s;
}
.to-top.show { opacity: 1; pointer-events: auto; }

/* ---------- 响应式 ---------- */
@media (max-width: 960px) {
  .hero-grid { grid-template-columns: 1fr; gap: 34px; }
  .hero-art { max-width: 460px; margin: 0 auto; }
  .detail-layout { grid-template-columns: 1fr; gap: 30px; }
  .about-grid { grid-template-columns: 1fr; gap: 30px; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 720px) {
  .nav-links {
    position: absolute; left: 0; right: 0; top: 66px; flex-direction: column; gap: 2px;
    padding: 12px 22px 18px; background: var(--bg-alt); border-bottom: 1px solid var(--border);
    display: none;
  }
  .nav-links.open { display: flex; }
  .nav-toggle { display: grid; margin-left: auto; }
  .nav-links { margin-left: 0; }
  .section { padding: 62px 0; }
  .hero { padding: 66px 0 56px; }
  .card-grid { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; }
  .hero-stats { gap: 24px; }
}