/* a4zbabz · 样式表
 * 设计：冷调骨白纸面 + 墨黑字 + 钴蓝主色 + 信号橙点缀
 * 结构元素（平台 / 版本 / 日期 / 状态）都承载真实信息，不做装饰。
 */

/* ---------- 自托管字体（不依赖 Google Fonts，国内可直连） ---------- */
@font-face {
  font-family: "Tektur";
  src: url("../fonts/Tektur-Regular.ttf") format("truetype");
  font-weight: 400;
  font-display: swap;
}
@font-face {
  font-family: "Tektur";
  src: url("../fonts/Tektur-Medium.ttf") format("truetype");
  font-weight: 500;
  font-display: swap;
}
@font-face {
  font-family: "InstrumentSans";
  src: url("../fonts/InstrumentSans-Regular.ttf") format("truetype");
  font-weight: 400;
  font-display: swap;
}
@font-face {
  font-family: "InstrumentSans";
  src: url("../fonts/InstrumentSans-Bold.ttf") format("truetype");
  font-weight: 700;
  font-display: swap;
}
@font-face {
  font-family: "GeistMono";
  src: url("../fonts/GeistMono-Regular.ttf") format("truetype");
  font-weight: 400;
  font-display: swap;
}

/* ---------- 设计变量 ---------- */
:root {
  --paper: #eff0ec;
  --panel: #ffffff;
  --panel-2: #f7f8f5;
  --ink: #171a19;
  --ink-2: #3d413e;
  --muted: #5e655f;
  --line: #d3d6cf;
  --line-2: #bcbfb8;
  --accent: #1f5bd8;
  --accent-ink: #17419c;
  --signal: #e4572e;
  --ok: #2e9e63;

  --radius: 5px;
  --radius-sm: 2px;
  --wrap: 1080px;

  --font-display: "Tektur", "PingFang SC", "Microsoft YaHei", "Noto Sans CJK SC",
    sans-serif;
  --font-body: "InstrumentSans", "PingFang SC", "Microsoft YaHei",
    "Noto Sans CJK SC", "Hiragino Sans GB", sans-serif;
  --font-mono: "GeistMono", ui-monospace, "SFMono-Regular", Consolas, monospace;
}

/* ---------- 基础 ---------- */
*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--font-body);
  font-size: clamp(15px, 0.6vw + 13.5px, 16.5px);
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

a {
  color: var(--accent);
  text-decoration: none;
}
a:hover {
  color: var(--accent-ink);
  text-decoration: underline;
  text-underline-offset: 3px;
}

:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
  border-radius: var(--radius-sm);
}

img {
  max-width: 100%;
  display: block;
}

hr {
  border: 0;
  border-top: 1px solid var(--line);
  margin: 0;
}

.wrap {
  width: 100%;
  max-width: var(--wrap);
  margin: 0 auto;
  padding: 0 24px;
}

.skip {
  position: absolute;
  left: -9999px;
  top: 0;
  background: var(--ink);
  color: #fff;
  padding: 10px 16px;
  z-index: 100;
}
.skip:focus {
  left: 12px;
  top: 12px;
}

/* ---------- 页头 ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  background: rgba(239, 240, 236, 0.86);
  backdrop-filter: saturate(140%) blur(8px);
  border-bottom: 1px solid var(--line);
}
.site-header .wrap {
  display: flex;
  align-items: center;
  gap: 20px;
  height: 62px;
}
.brand {
  font-family: var(--font-display);
  font-weight: 500;
  font-size: 21px;
  letter-spacing: 0.01em;
  color: var(--ink);
  text-decoration: none;
}
.brand:hover {
  color: var(--ink);
  text-decoration: none;
}
.brand b {
  color: var(--accent);
  font-weight: 500;
}
.site-nav {
  margin-left: auto;
  display: flex;
  gap: 4px;
  align-items: center;
}
.site-nav a {
  color: var(--ink-2);
  text-decoration: none;
  padding: 7px 12px;
  border-radius: var(--radius-sm);
  font-size: 15px;
}
.site-nav a:hover {
  color: var(--ink);
  background: rgba(23, 26, 25, 0.05);
  text-decoration: none;
}
.site-nav a[aria-current="page"] {
  color: var(--ink);
  font-weight: 700;
}
.nav-toggle {
  display: none;
}

/* ---------- 通用标签 / 徽章 ---------- */
.chip {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  font-size: 12px;
  line-height: 1;
  padding: 5px 9px;
  border: 1px solid var(--line-2);
  border-radius: var(--radius-sm);
  color: var(--muted);
  background: var(--panel);
  white-space: nowrap;
}
.chip--platform {
  border-color: color-mix(in srgb, var(--accent) 42%, var(--line-2));
  color: var(--accent-ink);
  background: color-mix(in srgb, var(--accent) 7%, var(--panel));
}
.chip--tag {
  background: transparent;
  border-style: dashed;
}
.status {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 12px;
  color: var(--muted);
}
.status::before {
  content: "";
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--muted);
}
.status[data-s="在线"]::before {
  background: var(--ok);
}
.status[data-s="开发中"]::before {
  background: var(--signal);
}
.status[data-s="已下线"]::before {
  background: var(--line-2);
}

.meta {
  font-family: var(--font-mono);
  font-size: 12.5px;
  color: var(--muted);
  letter-spacing: -0.01em;
}

/* ---------- 按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 18px;
  border-radius: var(--radius-sm);
  border: 1px solid transparent;
  font-size: 15px;
  font-weight: 700;
  cursor: pointer;
  text-decoration: none;
  transition: transform 0.12s ease, background 0.15s ease, border-color 0.15s ease;
}
.btn:hover {
  text-decoration: none;
}
.btn--primary {
  background: var(--ink);
  color: #fff;
}
.btn--primary:hover {
  background: #000;
  color: #fff;
}
.btn--ghost {
  background: transparent;
  border-color: var(--line-2);
  color: var(--ink);
}
.btn--ghost:hover {
  border-color: var(--ink);
  color: var(--ink);
  background: rgba(23, 26, 25, 0.04);
}

/* ---------- Hero ---------- */
.hero {
  padding: clamp(40px, 7vw, 84px) 0 clamp(28px, 4vw, 44px);
}
.hero .wrap {
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  gap: clamp(28px, 5vw, 64px);
  align-items: center;
}
.hero-kicker {
  font-size: 14px;
  color: var(--muted);
  margin: 0 0 14px;
}
.hero h1 {
  font-family: var(--font-display);
  font-weight: 500;
  font-size: clamp(30px, 4.6vw, 52px);
  line-height: 1.12;
  letter-spacing: -0.015em;
  margin: 0 0 18px;
  text-wrap: balance;
}
.hero h1 .zh {
  font-family: var(--font-body);
  font-weight: 700;
  letter-spacing: -0.02em;
}
.hero p.lead {
  font-size: clamp(16px, 1.1vw + 14px, 18.5px);
  color: var(--ink-2);
  max-width: 34em;
  margin: 0 0 26px;
}
.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

/* 右侧「工作台」货架：全页唯一一处强视觉 */
.shelf {
  position: relative;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background:
    linear-gradient(var(--line) 1px, transparent 1px) 0 0 / 100% 22px,
    linear-gradient(90deg, var(--line) 1px, transparent 1px) 0 0 / 22px 100%,
    var(--panel-2);
  background-blend-mode: normal;
  padding: 18px;
  box-shadow: 0 18px 40px -28px rgba(23, 26, 25, 0.5);
}
.shelf-label {
  font-family: var(--font-mono);
  font-size: 11.5px;
  color: var(--muted);
  margin: 0 0 12px;
}
.shelf-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
}
.shelf-item {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 10px;
  display: flex;
  align-items: center;
  gap: 10px;
  min-height: 60px;
}
.shelf-item img {
  width: 34px;
  height: 34px;
  border-radius: 6px;
  flex: none;
}
.shelf-item .n {
  font-size: 13.5px;
  font-weight: 700;
  line-height: 1.25;
}
.shelf-item .p {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--muted);
}
.shelf-item--wide {
  grid-column: span 2;
  justify-content: space-between;
}
.shelf-qr {
  width: 62px;
  height: 62px;
  flex: none;
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  background: #fff;
  padding: 3px;
}

/* ---------- 区块 ---------- */
.section {
  padding: clamp(30px, 5vw, 56px) 0;
  border-top: 1px solid var(--line);
}
.section-head {
  display: flex;
  align-items: baseline;
  gap: 16px;
  margin-bottom: 24px;
}
.section-head h2 {
  font-size: clamp(19px, 1.6vw + 15px, 24px);
  margin: 0;
  letter-spacing: -0.01em;
}
.section-head .more {
  margin-left: auto;
  font-size: 14px;
  white-space: nowrap;
}
.section-head p {
  margin: 0;
  color: var(--muted);
  font-size: 15px;
}

/* ---------- 作品网格 ---------- */
.works-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
}
.work {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 12px;
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 16px;
  transition: transform 0.14s ease, border-color 0.14s ease, box-shadow 0.14s ease;
}
.work:hover {
  transform: translateY(-3px);
  border-color: var(--line-2);
  box-shadow: 0 16px 30px -22px rgba(23, 26, 25, 0.55);
}
.work-top {
  display: flex;
  gap: 12px;
  align-items: flex-start;
}
.work-top img {
  width: 42px;
  height: 42px;
  border-radius: 8px;
  flex: none;
  border: 1px solid var(--line);
}
.work h3 {
  margin: 0;
  font-size: 17px;
  letter-spacing: -0.01em;
}
.work .tagline {
  color: var(--accent-ink);
  font-size: 13.5px;
  font-weight: 700;
  margin: 2px 0 0;
}
.work .desc {
  margin: 0;
  color: var(--ink-2);
  font-size: 14.5px;
}
.work-foot {
  margin-top: auto;
  padding-top: 12px;
  border-top: 1px dashed var(--line-2);
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
}
.work-foot .meta {
  margin-left: auto;
}
.chips {
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
}

/* ---------- 筛选 ---------- */
.filters {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  margin-bottom: 26px;
}
.filter {
  font: inherit;
  font-size: 14px;
  padding: 7px 14px;
  border-radius: 999px;
  border: 1px solid var(--line-2);
  background: transparent;
  color: var(--ink-2);
  cursor: pointer;
}
.filter:hover {
  border-color: var(--ink);
  color: var(--ink);
}
.filter[aria-pressed="true"] {
  background: var(--ink);
  border-color: var(--ink);
  color: #fff;
}
.count {
  color: var(--muted);
  font-family: var(--font-mono);
  font-size: 12.5px;
  margin-left: auto;
  align-self: center;
}

/* ---------- 笔记列表 ---------- */
.notes {
  border-top: 1px solid var(--line);
}
.note-row {
  display: grid;
  grid-template-columns: 108px 1fr auto;
  gap: 20px;
  align-items: baseline;
  padding: 20px 4px;
  border-bottom: 1px solid var(--line);
}
.note-row:hover {
  background: rgba(23, 26, 25, 0.025);
}
.note-row .date {
  font-family: var(--font-mono);
  font-size: 12.5px;
  color: var(--muted);
}
.note-row h3 {
  margin: 0 0 4px;
  font-size: 18px;
  letter-spacing: -0.01em;
}
.note-row:hover h3 a {
  color: var(--accent-ink);
}
.note-row h3 a {
  color: var(--ink);
  text-decoration: none;
}
.note-row .excerpt {
  margin: 0;
  color: var(--ink-2);
  font-size: 14.5px;
  max-width: 60ch;
}
.note-row .chips {
  justify-content: flex-end;
}

/* ---------- 笔记正文 ---------- */
.article {
  padding: clamp(34px, 6vw, 70px) 0 60px;
}
.article .wrap {
  max-width: 760px;
}
.article header {
  margin-bottom: 30px;
  padding-bottom: 22px;
  border-bottom: 1px solid var(--line);
}
.article h1 {
  font-size: clamp(26px, 3.4vw, 38px);
  line-height: 1.2;
  letter-spacing: -0.02em;
  margin: 8px 0 14px;
}
.article .back {
  font-size: 14px;
}
.prose {
  font-size: 17px;
  line-height: 1.8;
  color: var(--ink-2);
}
.prose h2 {
  color: var(--ink);
  font-size: 21px;
  margin: 38px 0 12px;
  letter-spacing: -0.01em;
}
.prose p {
  margin: 0 0 18px;
}
.prose ul {
  margin: 0 0 18px;
  padding-left: 1.2em;
}
.prose li {
  margin: 5px 0;
}
.prose li::marker {
  color: var(--accent);
}
.prose strong {
  color: var(--ink);
}
.prose code {
  font-family: var(--font-mono);
  font-size: 0.86em;
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  padding: 1px 5px;
}
.prose pre {
  background: var(--ink);
  color: #eef0ec;
  padding: 16px 18px;
  border-radius: var(--radius);
  overflow: auto;
  margin: 0 0 20px;
}
.prose pre code {
  background: none;
  border: 0;
  padding: 0;
  color: inherit;
  font-size: 13.5px;
  line-height: 1.6;
}

/* ---------- 关于 ---------- */
.about-grid {
  display: grid;
  grid-template-columns: 1.4fr 0.9fr;
  gap: clamp(28px, 5vw, 64px);
}
.about-grid h2 {
  margin-top: 0;
}
.fact-list {
  list-style: none;
  margin: 0;
  padding: 0;
  border-top: 1px solid var(--line);
}
.fact-list li {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  padding: 12px 0;
  border-bottom: 1px solid var(--line);
  font-size: 15px;
}
.fact-list .k {
  color: var(--muted);
}
.fact-list .v {
  font-family: var(--font-mono);
  font-size: 13.5px;
}

/* ---------- 页脚 ---------- */
.site-footer {
  border-top: 1px solid var(--line);
  padding: 30px 0 46px;
  color: var(--muted);
  font-size: 14px;
}
.site-footer .wrap {
  display: flex;
  flex-wrap: wrap;
  gap: 12px 24px;
  align-items: center;
}
.site-footer .sep {
  flex: 1;
}
.site-footer a {
  color: var(--ink-2);
}

/* ---------- 入场动效（一次，克制） ---------- */
@media (prefers-reduced-motion: no-preference) {
  .reveal {
    opacity: 0;
    transform: translateY(12px);
    animation: rise 0.6s cubic-bezier(0.2, 0.7, 0.2, 1) forwards;
  }
  .d1 {
    animation-delay: 0.05s;
  }
  .d2 {
    animation-delay: 0.13s;
  }
  .d3 {
    animation-delay: 0.21s;
  }
  .d4 {
    animation-delay: 0.29s;
  }
  @keyframes rise {
    to {
      opacity: 1;
      transform: none;
    }
  }
}

/* ---------- 响应式 ---------- */
@media (max-width: 900px) {
  .hero .wrap {
    grid-template-columns: 1fr;
  }
  .works-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .about-grid {
    grid-template-columns: 1fr;
  }
}
@media (max-width: 640px) {
  .wrap {
    padding: 0 18px;
  }
  .works-grid {
    grid-template-columns: 1fr;
  }
  .note-row {
    grid-template-columns: 1fr;
    gap: 6px;
  }
  .note-row .chips {
    justify-content: flex-start;
  }
  .section-head {
    flex-wrap: wrap;
  }
  .section-head .more {
    margin-left: 0;
  }
  .site-nav a {
    padding: 7px 9px;
  }
}