/* ============================================================
   Base64Deco — "Letterpress Foundry" 铸字工坊风 / 浅色
   设计隐喻：Base64 字母表 = 64 个铸造铅字。
   编码是把字节"浇铸"成铅字行，解码是反向拆版。
   字体：Bodoni Moda（展示衬线）+ Karla（正文）+ IBM Plex Mono（铅字等宽）。
   ============================================================ */

:root {
  --paper: #f7f3e9;
  --paper-2: #efe9da;
  --card: #fdfbf4;
  --card-2: #f5f1e4;

  --ink: #262b21;
  --ink-soft: #59614f;
  --ink-faint: #919a85;

  --accent: #bf4128;          /* 铅丹朱 */
  --accent-deep: #9c3018;
  --accent-soft: rgba(191, 65, 40, .11);
  --verdigris: #3f6e5a;       /* 铜绿 */
  --verdigris-soft: rgba(63, 110, 90, .10);
  --err: #9e2a2b;
  --err-soft: rgba(158, 42, 43, .08);

  --line: #ddd4bf;
  --line-2: #c9bfa5;

  --radius: 14px;
  --radius-sm: 9px;
  --max-width: 1280px;
  --mono: "IBM Plex Mono", "SF Mono", Consolas, monospace;
  --sans: "Karla", "PingFang SC", "Microsoft YaHei", -apple-system, "Segoe UI", sans-serif;
  --display: "Bodoni Moda", Georgia, serif;

  --shadow-sm: 0 1px 2px rgba(38, 43, 33, .06), 0 4px 12px rgba(38, 43, 33, .05);
  --shadow-md: 0 2px 6px rgba(38, 43, 33, .07), 0 18px 40px rgba(38, 43, 33, .10);
}

* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }

body {
  font-family: var(--sans);
  color: var(--ink);
  line-height: 1.7;
  font-size: 16px;
  position: relative;
  background: var(--paper);
}

/* 纸张纤维横纹 + 渐晕 */
body::before {
  content: "";
  position: fixed; inset: 0; z-index: 0; pointer-events: none;
  background-image:
    repeating-linear-gradient(0deg, transparent 0 3px, rgba(38, 43, 33, .016) 3px 4px),
    radial-gradient(1200px 600px at 50% -10%, rgba(255, 253, 246, .7), transparent 60%);
}

main, .site-header, .site-footer { position: relative; z-index: 1; }

::selection { background: var(--accent-soft); }

.inner { max-width: var(--max-width); margin: 0 auto; padding: 0 28px; }

/* ============ Header ============ */

.site-header {
  background: rgba(247, 243, 233, .92);
  backdrop-filter: blur(8px);
  border-bottom: 3px double var(--line-2);
  position: sticky; top: 0; z-index: 50;
}
.site-header .inner { display: flex; align-items: center; justify-content: space-between; height: 66px; }
.logo { display: flex; align-items: center; gap: 11px; font-family: var(--display); font-weight: 700; font-size: 1.2rem; letter-spacing: -.01em; color: var(--ink); text-decoration: none; }
.logo:hover { color: var(--accent-deep); }
.logo-img { width: 38px; height: 38px; display: block; }
.logo .b64-tag {
  font-family: var(--mono); font-size: .62rem; font-weight: 600; letter-spacing: .08em;
  color: var(--accent-deep); background: var(--accent-soft);
  border: 1px solid rgba(191, 65, 40, .25); border-radius: 5px; padding: 2px 7px;
  transform: translateY(-2px);
}
.nav-links { display: flex; gap: 2px; list-style: none; }
.nav-links a {
  text-decoration: none; color: var(--ink-soft); font-weight: 600; font-size: .9rem;
  padding: 8px 14px; border-radius: 8px; transition: all .18s;
}
.nav-links a:hover { color: var(--accent-deep); background: var(--accent-soft); }

.menu-btn { display: none; flex-direction: column; gap: 5px; background: none; border: none; cursor: pointer; padding: 8px; }
.menu-btn .bar { width: 20px; height: 2px; background: var(--ink); border-radius: 2px; transition: all .2s; }
.menu-btn[aria-expanded="true"] .bar:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.menu-btn[aria-expanded="true"] .bar:nth-child(2) { opacity: 0; }
.menu-btn[aria-expanded="true"] .bar:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ============ Hero ============ */

.hero { padding: 64px 0 30px; }
.hero .inner { display: grid; grid-template-columns: 1.15fr .85fr; gap: 48px; align-items: center; }
.eyebrow {
  display: inline-flex; align-items: center; gap: 10px;
  font-family: var(--mono); font-size: .68rem; font-weight: 600; letter-spacing: .18em;
  color: var(--accent-deep); text-transform: uppercase;
  border-top: 1px solid var(--line-2); border-bottom: 1px solid var(--line-2);
  padding: 7px 2px; margin-bottom: 20px;
}
.eyebrow::before { content: ""; width: 7px; height: 7px; background: var(--accent); border-radius: 2px; }
.hero h1 {
  font-family: var(--display); font-weight: 700;
  font-size: clamp(2.3rem, 4.6vw, 3.5rem); line-height: 1.08; letter-spacing: -.015em;
  color: var(--ink); margin-bottom: 20px;
}
.hero h1 em { font-style: italic; color: var(--accent); }
.lead { font-size: 1.06rem; color: var(--ink-soft); max-width: 540px; margin-bottom: 24px; }
.hero-trust { list-style: none; display: grid; gap: 10px; }
.hero-trust li { display: flex; align-items: center; gap: 10px; font-size: .92rem; font-weight: 600; color: var(--ink); }
.hero-trust svg { flex: none; }

.hero-art { position: relative; }
.hero-art svg { width: 100%; height: auto; display: block; }
.hero-art::after {
  content: ""; position: absolute; inset: -14px; z-index: -1; pointer-events: none;
  border: 1px solid var(--line); border-radius: 20px;
}

/* ============ 工具区（印刷工单） ============ */

.tool-section { padding: 34px 0 26px; }
.workspace {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow-md);
  overflow: hidden;
}
/* 双线印刷边框 */
.workspace::before {
  content: ""; display: block; height: 5px;
  background:
    linear-gradient(var(--ink), var(--ink)) 0 0 / 100% 1.5px no-repeat,
    linear-gradient(var(--line-2), var(--line-2)) 0 3.5px / 100% 1px no-repeat;
}

.job-head {
  display: flex; align-items: center; justify-content: space-between; gap: 14px;
  padding: 14px 22px; border-bottom: 1px solid var(--line);
  background: linear-gradient(var(--card-2), var(--card));
}
.job-title { font-family: var(--mono); font-size: .74rem; font-weight: 600; letter-spacing: .14em; color: var(--ink-soft); text-transform: uppercase; }
.job-no { font-family: var(--display); font-style: italic; font-size: .9rem; color: var(--ink-faint); }
.job-status {
  font-family: var(--mono); font-size: .68rem; font-weight: 600; letter-spacing: .08em;
  color: var(--verdigris); background: var(--verdigris-soft);
  border: 1px solid rgba(63, 110, 90, .25); border-radius: 999px; padding: 3px 12px;
}
.job-status.bad { color: var(--err); background: var(--err-soft); border-color: rgba(158, 42, 43, .3); }

.console { padding: 20px 22px 8px; }

.mode-tabs { display: flex; gap: 8px; flex-wrap: wrap; margin-bottom: 16px; }
.mode-tab {
  font-family: var(--mono); font-size: .78rem; font-weight: 600; letter-spacing: .06em;
  padding: 8px 18px; border-radius: 8px; cursor: pointer;
  background: var(--card); color: var(--ink-soft);
  border: 1.6px solid var(--line-2); transition: all .16s;
}
.mode-tab:hover { border-color: var(--ink); color: var(--ink); }
.mode-tab.on { background: var(--ink); color: var(--paper); border-color: var(--ink); }

.tool-row { display: flex; gap: 10px; align-items: center; flex-wrap: wrap; margin-bottom: 14px; }
.tool-switch {
  display: inline-flex; align-items: center; gap: 8px; cursor: pointer;
  font-family: var(--mono); font-size: .74rem; font-weight: 600; letter-spacing: .04em;
  color: var(--ink-soft); background: var(--card);
  border: 1.6px solid var(--line-2); border-radius: 8px; padding: 7px 13px;
  transition: all .16s; user-select: none;
}
.tool-switch:hover { border-color: var(--ink); color: var(--ink); }
.tool-switch.on { color: var(--accent-deep); border-color: rgba(191, 65, 40, .45); background: var(--accent-soft); }
.tool-switch .dot { width: 8px; height: 8px; border-radius: 50%; background: var(--line-2); transition: background .16s; }
.tool-switch.on .dot { background: var(--accent); }
.tool-hint { font-family: var(--mono); font-size: .7rem; color: var(--ink-faint); letter-spacing: .03em; }

/* 嗅探条 */
.sniff-bar {
  display: flex; align-items: center; gap: 10px; margin-bottom: 14px;
  font-family: var(--mono); font-size: .74rem; font-weight: 600; letter-spacing: .04em;
  color: var(--ink-soft); background: var(--card-2);
  border: 1px dashed var(--line-2); border-radius: 9px; padding: 9px 14px;
}
.sniff-bar .sniff-dot { width: 8px; height: 8px; border-radius: 2px; background: var(--verdigris); flex: none; }
.sniff-bar.img .sniff-dot { background: var(--accent); }
.sniff-bar.txt .sniff-dot { background: var(--ink-faint); }
.sniff-bar b { color: var(--ink); }

/* 警告条 */
.alert-bar {
  display: flex; gap: 12px; align-items: flex-start;
  border-radius: var(--radius-sm); padding: 12px 16px; margin: 0 0 14px;
  font-size: .88rem; line-height: 1.55;
}
.alert-err { background: var(--err-soft); border: 1px solid rgba(158, 42, 43, .3); color: #7c2223; }
.alert-warn { background: var(--accent-soft); border: 1px solid rgba(191, 65, 40, .3); color: var(--accent-deep); }
.al-badge { font-family: var(--mono); font-weight: 700; flex: none; transform: translateY(1px); }
.alert-bar strong { font-weight: 700; }
.alert-bar code { font-family: var(--mono); font-size: .82em; background: rgba(38, 43, 33, .07); padding: 1px 5px; border-radius: 4px; }

/* IO 双栏 */
.io-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; padding: 0 22px 20px; }
.pane { display: flex; flex-direction: column; gap: 10px; min-width: 0; }
.pane-head { display: flex; align-items: center; justify-content: space-between; gap: 10px; }
.pane-label {
  display: inline-flex; align-items: center; gap: 9px;
  font-family: var(--mono); font-size: .7rem; font-weight: 600; letter-spacing: .14em;
  text-transform: uppercase; color: var(--ink-soft);
}
.pane-label .swatch { width: 9px; height: 9px; border-radius: 2.5px; background: var(--verdigris); }
.pane.pane-out .pane-label .swatch { background: var(--accent); }
.pane-tools { display: flex; gap: 6px; }
.mini-btn {
  font-family: var(--mono); font-size: .7rem; font-weight: 600; letter-spacing: .04em;
  color: var(--ink-soft); background: var(--card);
  border: 1.4px solid var(--line-2); border-radius: 7px; padding: 5px 11px;
  cursor: pointer; transition: all .15s;
}
.mini-btn:hover { color: var(--ink); border-color: var(--ink); }
.mini-btn.primary { color: var(--accent-deep); border-color: rgba(191, 65, 40, .4); background: var(--accent-soft); }
.mini-btn.primary:hover { border-color: var(--accent); }
.mini-btn.copied { color: var(--verdigris); border-color: rgba(63, 110, 90, .4); background: var(--verdigris-soft); }

textarea#text-input {
  width: 100%; min-height: 220px; resize: vertical;
  font-family: var(--mono); font-size: .86rem; line-height: 1.65;
  color: var(--ink); background: var(--card);
  border: 1.6px solid var(--line-2); border-radius: var(--radius-sm);
  padding: 14px 16px; outline: none; transition: border-color .16s, box-shadow .16s;
}
textarea#text-input:focus { border-color: var(--verdigris); box-shadow: 0 0 0 3px var(--verdigris-soft); }
textarea#text-input.drag-over { border-color: var(--accent); box-shadow: 0 0 0 3px var(--accent-soft); }

.out-area {
  min-height: 220px; max-height: 420px; overflow: auto;
  font-family: var(--mono); font-size: .86rem; line-height: 1.65;
  color: var(--ink); background: var(--card-2);
  border: 1.6px solid var(--line-2); border-left: 4px solid var(--accent);
  border-radius: var(--radius-sm); padding: 14px 16px;
  white-space: pre-wrap; word-break: break-all; overflow-wrap: anywhere;
}
.out-area.empty { color: var(--ink-faint); border-left-color: var(--line-2); }
.out-area .out-err { color: var(--err); }

.stats-row { display: flex; gap: 8px; flex-wrap: wrap; }
.stat {
  font-family: var(--mono); font-size: .68rem; font-weight: 600; letter-spacing: .03em;
  color: var(--ink-soft); background: var(--card);
  border: 1px solid var(--line); border-radius: 7px; padding: 4px 10px;
}
.stat b { color: var(--ink); font-weight: 700; }

/* 图片嗅探预览卡 */
.img-card {
  display: grid; grid-template-columns: 130px 1fr; gap: 16px; align-items: start;
  background: var(--card-2); border: 1.6px solid var(--line-2);
  border-left: 4px solid var(--accent); border-radius: var(--radius-sm); padding: 14px;
}
.img-card img { width: 130px; height: 130px; object-fit: contain; background:
  repeating-conic-gradient(#efe9da 0% 25%, #fdfbf4 0% 50%) 0 0 / 16px 16px;
  border: 1px solid var(--line); border-radius: 8px; }
.img-card .img-facts { display: grid; gap: 6px; font-family: var(--mono); font-size: .74rem; color: var(--ink-soft); }
.img-card .img-facts b { color: var(--ink); }
.img-card .img-facts .img-actions { display: flex; gap: 6px; margin-top: 6px; }

/* ============ 图片工坊 ============ */

.workshop { border-top: 1px solid var(--line); padding: 22px; background: linear-gradient(var(--card), var(--card-2)); }
.ws-head { display: flex; align-items: baseline; justify-content: space-between; gap: 12px; margin-bottom: 14px; flex-wrap: wrap; }
.ws-title { font-family: var(--display); font-weight: 700; font-size: 1.25rem; color: var(--ink); }
.ws-title .no { font-style: italic; color: var(--accent); }
.ws-sub { font-family: var(--mono); font-size: .7rem; color: var(--ink-faint); letter-spacing: .06em; }

.dropzone {
  border: 2px dashed var(--line-2); border-radius: var(--radius-sm);
  background: var(--card); padding: 34px 20px; text-align: center; cursor: pointer;
  transition: all .18s;
}
.dropzone:hover, .dropzone.drag-over { border-color: var(--accent); background: var(--accent-soft); }
.dropzone .dz-icon { margin-bottom: 10px; }
.dropzone .dz-main { font-weight: 700; font-size: .96rem; color: var(--ink); }
.dropzone .dz-sub { font-family: var(--mono); font-size: .7rem; color: var(--ink-faint); margin-top: 4px; letter-spacing: .04em; }

.ws-panel { display: grid; grid-template-columns: minmax(220px, 340px) 1fr; gap: 22px; align-items: start; }
.ws-preview-wrap { position: relative; }
.ws-preview {
  width: 100%; border: 1px solid var(--line); border-radius: var(--radius-sm); display: block;
  background: repeating-conic-gradient(#efe9da 0% 25%, #fdfbf4 0% 50%) 0 0 / 16px 16px;
}
.ws-controls { display: grid; gap: 14px; }
.ctrl-row { display: flex; align-items: center; gap: 12px; flex-wrap: wrap; }
.ctrl-label { font-family: var(--mono); font-size: .7rem; font-weight: 600; letter-spacing: .1em; text-transform: uppercase; color: var(--ink-soft); min-width: 72px; }
select.fmt-select, input[type="range"].q-range {
  accent-color: var(--accent);
}
select.fmt-select {
  font-family: var(--mono); font-size: .8rem; font-weight: 600; color: var(--ink);
  background: var(--card); border: 1.6px solid var(--line-2); border-radius: 8px;
  padding: 7px 12px; cursor: pointer; outline: none;
}
select.fmt-select:focus { border-color: var(--accent); }
input[type="range"].q-range { flex: 1; min-width: 140px; height: 4px; cursor: pointer; }
.q-val { font-family: var(--mono); font-size: .76rem; font-weight: 600; color: var(--accent-deep); min-width: 38px; }
.q-note { font-family: var(--mono); font-size: .68rem; color: var(--ink-faint); }

.ws-info { display: flex; gap: 8px; flex-wrap: wrap; }
.ws-actions { display: flex; gap: 8px; flex-wrap: wrap; }
.ws-actions .mini-btn { padding: 8px 16px; font-size: .74rem; }

.pixels-details { border: 1px solid var(--line); border-radius: var(--radius-sm); background: var(--card); padding: 0 14px; }
.pixels-details summary {
  cursor: pointer; list-style: none; padding: 11px 0;
  font-family: var(--mono); font-size: .72rem; font-weight: 600; letter-spacing: .08em;
  color: var(--ink-soft); text-transform: uppercase;
}
.pixels-details summary::-webkit-details-marker { display: none; }
.pixels-details summary::before { content: "+ "; color: var(--accent); }
.pixels-details[open] summary::before { content: "− "; }
.pixels-body { padding: 0 0 14px; }
.pixels-note { font-size: .8rem; color: var(--ink-soft); margin-bottom: 10px; }
.pixels-val {
  font-family: var(--mono); font-size: .72rem; color: var(--ink);
  background: var(--card-2); border: 1px solid var(--line);
  border-radius: 7px; padding: 10px 12px; max-height: 100px; overflow: auto;
  white-space: pre-wrap; word-break: break-all;
}

/* ============ 内容区 ============ */

.content-section { padding: 54px 0 8px; }
.sec-no {
  display: block; font-family: var(--mono); font-size: .68rem; font-weight: 600;
  letter-spacing: .2em; color: var(--accent-deep); text-transform: uppercase; margin-bottom: 12px;
}
.content-section h2 {
  font-family: var(--display); font-weight: 700;
  font-size: clamp(1.7rem, 3vw, 2.3rem); line-height: 1.15; color: var(--ink);
  margin-bottom: 12px; letter-spacing: -.01em;
}
.sec-sub { color: var(--ink-soft); font-size: 1rem; max-width: 640px; margin-bottom: 30px; }

.feature-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; }
.feature {
  background: var(--card); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 22px 20px; box-shadow: var(--shadow-sm);
  border-top: 3px solid var(--line-2); transition: all .2s;
}
.feature:hover { border-top-color: var(--accent); transform: translateY(-3px); box-shadow: var(--shadow-md); }
.f-icon {
  width: 40px; height: 40px; border-radius: 10px; display: flex; align-items: center; justify-content: center;
  background: var(--accent-soft); color: var(--accent-deep); margin-bottom: 14px;
}
.feature h3 { font-family: var(--display); font-weight: 700; font-size: 1.08rem; color: var(--ink); margin-bottom: 8px; }
.feature p { font-size: .87rem; color: var(--ink-soft); line-height: 1.62; }
.feature code { font-family: var(--mono); font-size: .82em; background: var(--card-2); border: 1px solid var(--line); padding: 1px 5px; border-radius: 4px; color: var(--accent-deep); }

/* 字母表（Type Case） */
.alphabet-wrap { overflow-x: auto; padding-bottom: 6px; }
.alphabet-table { display: grid; grid-template-columns: repeat(16, 1fr); gap: 6px; min-width: 720px; }
.alpha-cell {
  background: var(--card); border: 1px solid var(--line); border-radius: 8px;
  padding: 8px 4px 6px; text-align: center; position: relative; transition: all .15s;
  cursor: default;
}
.alpha-cell:hover { border-color: var(--accent); background: var(--accent-soft); transform: translateY(-2px); }
.alpha-cell .ch { font-family: var(--mono); font-size: 1.02rem; font-weight: 700; color: var(--ink); display: block; line-height: 1.2; }
.alpha-cell .ix { font-family: var(--mono); font-size: .58rem; color: var(--ink-faint); display: block; }
.alpha-cell.hl { border-color: rgba(191, 65, 40, .5); background: var(--accent-soft); }
.alpha-cell.hl .ch { color: var(--accent-deep); }
.alpha-note { font-family: var(--mono); font-size: .72rem; color: var(--ink-faint); margin-top: 14px; letter-spacing: .03em; }

/* FAQ */
.faq-block { display: grid; gap: 12px; max-width: 820px; }
.faq-block details {
  background: var(--card); border: 1px solid var(--line); border-radius: var(--radius-sm);
  padding: 4px 20px; transition: border-color .18s;
}
.faq-block details[open] { border-color: var(--line-2); box-shadow: var(--shadow-sm); }
.faq-block summary {
  cursor: pointer; list-style: none; font-weight: 700; font-size: .98rem; color: var(--ink);
  padding: 13px 0; display: flex; align-items: center; justify-content: space-between; gap: 14px;
}
.faq-block summary::-webkit-details-marker { display: none; }
.faq-block summary::after {
  content: "+"; font-family: var(--mono); font-size: 1.1rem; color: var(--accent);
  flex: none; transition: transform .18s;
}
.faq-block details[open] summary::after { transform: rotate(45deg); }
.faq-block details p { color: var(--ink-soft); font-size: .92rem; padding: 0 0 16px; }
.faq-block code { font-family: var(--mono); font-size: .84em; background: var(--card-2); border: 1px solid var(--line); padding: 1px 5px; border-radius: 4px; color: var(--accent-deep); }

/* 文章占位 */
.article-list { display: grid; gap: 14px; }
.article-list a {
  display: block; background: var(--card); border: 1px solid var(--line);
  border-radius: var(--radius-sm); padding: 16px 20px; text-decoration: none;
  transition: all .18s;
}
.article-list a:hover { transform: translateY(-2px); border-color: var(--accent); box-shadow: var(--shadow-md); }
.article-list .article-title { font-weight: 700; font-size: 1.02rem; color: var(--ink); margin-bottom: 6px; line-height: 1.45; }
.article-list a:hover .article-title { color: var(--accent-deep); }
.article-list .article-desc { font-size: .86rem; color: var(--ink-soft); line-height: 1.6; }

/* ============ 合规页/文章页 ============ */

.article-content { padding: 40px 0 50px; }
.article-content .inner { max-width: 800px; }
.article-content h1 { font-family: var(--display); font-weight: 700; font-size: clamp(1.8rem, 4vw, 2.4rem); line-height: 1.2; color: var(--ink); margin-bottom: 14px; }
.article-meta {
  font-family: var(--mono); font-size: .72rem; color: var(--ink-faint); letter-spacing: .05em;
  border-bottom: 3px double var(--line-2); padding-bottom: 16px; margin-bottom: 26px;
}
.article-content h2 { font-family: var(--display); font-weight: 700; font-size: 1.45rem; color: var(--ink); margin: 38px 0 15px; }
.article-content h3 { font-weight: 700; font-size: 1.16rem; color: var(--ink); margin: 28px 0 12px; }
.article-content p { margin-bottom: 18px; color: #3d4437; font-size: 1.02rem; }
.article-content ul, .article-content ol { margin: 0 0 18px 26px; }
.article-content li { margin-bottom: 10px; color: #3d4437; font-size: 1.02rem; }
.article-content strong { color: var(--ink); }
.article-content code { font-family: var(--mono); font-size: .86em; background: var(--card-2); border: 1px solid var(--line); padding: 1px 6px; border-radius: 5px; color: var(--accent-deep); }
.article-content pre { background: var(--ink); color: #e9ede3; padding: 18px 20px; border-radius: 12px; overflow-x: auto; margin: 0 0 20px; font-family: var(--mono); font-size: .84rem; line-height: 1.7; }
.article-content pre code { background: none; border: none; color: inherit; padding: 0; }
.article-content blockquote { border-left: 4px solid var(--accent); background: var(--accent-soft); padding: 14px 20px; margin: 0 0 20px; color: var(--ink-soft); border-radius: 0 10px 10px 0; }
.article-content a { color: var(--accent-deep); }

/* ============ Footer ============ */

.site-footer { margin-top: 70px; border-top: 3px double var(--line-2); background: var(--paper-2); }
.site-footer .inner { padding: 34px 28px; }
.footer-links { display: flex; gap: 6px 22px; flex-wrap: wrap; margin-bottom: 16px; }
.footer-links a { color: var(--ink-soft); text-decoration: none; font-size: .86rem; font-weight: 600; }
.footer-links a:hover { color: var(--accent-deep); }
.copyright { font-family: var(--mono); font-size: .72rem; color: var(--ink-faint); letter-spacing: .04em; }
.colophon { font-family: var(--display); font-style: italic; font-size: .88rem; color: var(--ink-faint); margin-top: 6px; }

/* ============ 响应式 ============ */

@media (max-width: 1060px) {
  .hero .inner { grid-template-columns: 1fr; gap: 34px; }
  .hero-art { max-width: 460px; }
  .feature-grid { grid-template-columns: repeat(2, 1fr); }
  .io-grid { grid-template-columns: 1fr; }
  .ws-panel { grid-template-columns: 1fr; }
  .ws-preview { max-width: 380px; }
}

@media (max-width: 640px) {
  .inner { padding: 0 18px; }
  .menu-btn { display: flex; }
  .nav-links {
    position: absolute; top: 66px; left: 0; right: 0;
    flex-direction: column; gap: 0;
    background: var(--card); border-bottom: 1px solid var(--line);
    box-shadow: var(--shadow-md);
    opacity: 0; visibility: hidden; transform: translateY(-8px);
    transition: all .2s;
  }
  .nav-links.open { opacity: 1; visibility: visible; transform: translateY(0); }
  .nav-links li { list-style: none; }
  .nav-links a { display: block; padding: 11px 14px; font-size: .88rem; }
  .feature-grid { grid-template-columns: 1fr; }
  .img-card { grid-template-columns: 1fr; }
  .img-card img { width: 100%; height: auto; max-height: 220px; }
  .workspace .console, .io-grid, .workshop { padding-left: 14px; padding-right: 14px; }
  .hero { padding-top: 44px; }
}

/* 移动端导航保护：无 JS 汉堡按钮的页面（合规页）恢复可见压缩导航 */
@media (max-width: 640px) {
  .site-header .inner:not(:has(.menu-btn)) nav { display: block; }
  .site-header .inner:not(:has(.menu-btn)) .nav-links {
    position: static; opacity: 1; visibility: visible; transform: none;
    flex-direction: row; flex-wrap: wrap; gap: 0;
    background: none; border: none; box-shadow: none;
  }
  .site-header .inner:not(:has(.menu-btn)) .nav-links a { padding: 6px 9px; font-size: .8rem; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation: none !important; transition: none !important; }
  html { scroll-behavior: auto; }
}