/* ============================================================================
 * qwenwork.css — 一探科技博客 · 第一套皮肤
 * 视觉来源：Test26 frontend/index.html（hero / 卡片 / footer / modal 全套）
 * 风格：Swiss-ish QwenWork 绿系
 *   - 三档绿色（--green-500 主） + 紫 / 橙 辅助
 *   - Geist Mono + Noto Sans SC
 *   - 暗色模式 via @media (prefers-color-scheme: dark)
 *   - 关键视觉：
 *     · Hero 双栏 + IDE 风格文件列表窗口（hero-frame）
 *     · 两个浮动 SVG 印章（stamp-anchor 圆形 / stamp-list 矩形）
 *     · 卡片三色 peel 角（v1 绿 / v2 紫 / v3 橙）
 *     · Modal 4 态（idle/ready/uploading/success/error）
 *     · Footer 三列 + 虚线 meta 行
 * ========================================================================== */

/* ---------- 浅色 token（Test26 全套） ---------- */
:root {
  --green-50: #F2FBF5;
  --green-100: #E2F6E8;
  --green-200: #C2EFCF;
  --green-300: #8FE5A9;
  --green-400: #5AF39A;
  --green-500: #41D87E;
  --green-600: #2FBE6A;
  --green-700: #1f9853;
  --green-ink: #0c5528;
  --ink: #1c2c21;
  --ink-2: #314338;
  --ink-3: #5b6a61;
  --ink-4: #8a958f;
  --line: #e6ece7;
  --line-2: #dde5df;
  --bg: #ffffff;
  --bg-soft: #f7faf8;
  --bg-warm: #fbf7ee;
  --orange: #F57C00;
  --orange-soft: #FFF3E0;
  --orange-ink: #7a5b00;
  --purple: #7C5CFF;
  --purple-soft: #EFE9FF;
  --shadow-stamp: 0 1px 0 rgba(255,255,255,.5) inset, 0 18px 40px -12px rgba(28,44,33,.18);
  --paper-shadow: 0 1px 0 rgba(28,44,33,.04), 0 8px 24px -8px rgba(28,44,33,.12);
  --paper-shadow-md: 0 1px 0 rgba(28,44,33,.04), 0 18px 40px -12px rgba(28,44,33,.18);
  --radius: 14px;
  --radius-lg: 22px;
  --maxw: 1200px;
}

/* ---------- 全局 / Reset ---------- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  font-family: "Noto Sans SC", -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  color: var(--ink);
  background: var(--bg);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}
a { color: inherit; text-decoration: none; }
img, svg { display: block; max-width: 100%; }
code, kbd, samp { font-family: "Geist Mono", ui-monospace, SFMono-Regular, Menlo, monospace; }
::selection { background: var(--green-500); color: var(--ink); }

/* ---------- 容器 ---------- */
.container { max-width: var(--maxw); margin: 0 auto; padding: 0 28px; }

/* ---------- Topbar ---------- */
.topbar {
  position: sticky; top: 0; z-index: 50;
  background: rgba(255,255,255,.82);
  backdrop-filter: saturate(160%) blur(12px);
  -webkit-backdrop-filter: saturate(160%) blur(12px);
  border-bottom: 1px solid var(--line);
}
.topbar-inner {
  display: flex; align-items: center; justify-content: space-between;
  padding: 14px 0;
}
.brand { display: flex; align-items: center; gap: 12px; font-weight: 800; }
.brand-mark {
  width: 38px; height: 38px;
  color: var(--ink); /* 黑圆用 ink 颜色（暗色模式下自动反相） */
  flex-shrink: 0;
}
.brand-mark-disc { color: inherit; }
.brand-text { display: flex; flex-direction: column; line-height: 1.1; }
.brand-text .name { font-size: 15px; font-weight: 800; letter-spacing: -.01em; }
.brand-text small { font-size: 10px; font-weight: 500; color: var(--ink-4); letter-spacing: .18em; margin-top: 2px; }
.nav-actions { display: flex; align-items: center; gap: 8px; }
.nav-link {
  padding: 8px 12px; border-radius: 8px; font-size: 13.5px; color: var(--ink-2); font-weight: 500;
  transition: background .15s, color .15s;
}
.nav-link:hover { background: var(--green-50); color: var(--ink); }
.theme-toggle {
  width: 36px; height: 36px; border-radius: 9px; background: transparent;
  border: 1px solid var(--line); display: grid; place-items: center; cursor: pointer;
  color: var(--ink-2);
  transition: background .15s, color .15s, border-color .15s;
}
.theme-toggle:hover { background: var(--green-50); color: var(--ink); border-color: var(--green-200); }
.theme-toggle svg { width: 16px; height: 16px; }
.skin-switcher {
  display: flex; align-items: center; gap: 8px;
  font-size: 12px; color: var(--ink-3);
}
.skin-switcher .skin-label {
  font-family: "Geist Mono", ui-monospace, monospace;
  font-size: 10.5px; letter-spacing: .12em; text-transform: uppercase;
  color: var(--ink-4); font-weight: 600;
}
.skin-switcher select {
  height: 32px; padding: 0 10px;
  border: 1px solid var(--line); border-radius: 8px;
  background: transparent; color: var(--ink-2);
  font-size: 13px; font-weight: 500; cursor: pointer;
}

/* ---------- Hero ---------- */
.hero {
  position: relative; overflow: hidden;
  padding: 88px 0 80px;
  background:
    radial-gradient(1100px 540px at 85% -8%, var(--green-50) 0%, transparent 60%),
    radial-gradient(800px 480px at -5% 35%, #fff 0%, transparent 60%),
    var(--bg-warm);
}
.hero-grid {
  display: grid; grid-template-columns: 1.1fr .9fr; gap: 64px; align-items: center;
}
.hero-text .eyebrow {
  display: inline-flex; align-items: center; gap: 8px;
  font-family: "Geist Mono", ui-monospace, monospace;
  font-size: 11px; letter-spacing: .16em; text-transform: uppercase;
  color: var(--ink-3); font-weight: 600;
  padding: 5px 11px; border-radius: 999px;
  background: var(--bg-warm); border: 1px solid var(--line);
}
.eyebrow .dot { width: 6px; height: 6px; border-radius: 50%; background: var(--green-500); box-shadow: 0 0 0 3px rgba(65,216,126,.18); }
.hero h1 {
  margin-top: 18px; font-weight: 800; letter-spacing: -.025em; color: var(--ink);
  font-size: clamp(46px, 7vw, 80px); line-height: 1.05;
}
.hero h1 .line { display: block; }
.hero h1 .accent {
  color: var(--ink); position: relative; display: inline-block;
  background: linear-gradient(180deg, transparent 65%, var(--green-400) 65%, var(--green-400) 92%, transparent 92%);
  padding: 0 4px; margin-left: 6px;
}
.hero .sub {
  margin-top: 22px; font-size: 18px; color: var(--ink-3); max-width: 580px; line-height: 1.65;
}
.hero .sub strong { color: var(--ink); font-weight: 700; }
.hero-meta { margin-top: 32px; display: flex; flex-wrap: wrap; gap: 10px; }
.chip {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 9px 14px; background: #fff; border: 1px solid var(--line);
  border-radius: 999px; font-size: 13.5px; color: var(--ink-2); font-weight: 500;
  box-shadow: 0 1px 0 rgba(28,44,33,.03);
}
.chip .pip { width: 6px; height: 6px; border-radius: 50%; background: var(--green-500); }
.chip.purple .pip { background: var(--purple); }
.chip.orange .pip { background: var(--orange); }

/* ---------- Hero right: IDE 风格文件列表窗口 ---------- */
.hero-illust {
  position: relative; aspect-ratio: 1.05/1; max-width: 520px; margin-left: auto;
}
/* 点阵背景（仅在 .hero-illust 内） */
.hero-illust::before {
  content: ""; position: absolute; inset: 8%; border-radius: 28px;
  background-image: radial-gradient(circle, var(--ink-4) 1px, transparent 1.4px);
  background-size: 18px 18px; opacity: .18; z-index: 0;
}
.hero-frame {
  position: relative; z-index: 1; height: 100%;
  background: var(--bg-soft);
  border: 1px solid var(--line-2);
  border-radius: 24px;
  box-shadow: var(--shadow-stamp);
  overflow: hidden; display: flex; flex-direction: column;
}
.hero-frame-bar {
  display: flex; align-items: center; justify-content: space-between;
  padding: 0 14px; height: 36px; flex: none;
  background: #fff; border-bottom: 1px solid var(--line);
}
.hero-frame-dots { display: flex; gap: 6px; align-items: center; }
.hero-frame-dots span { width: 10px; height: 10px; border-radius: 50%; display: block; border: 1px solid rgba(0,0,0,.06); }
.hero-frame-title {
  font-family: "Geist Mono", ui-monospace, monospace;
  font-size: 11px; font-weight: 600; letter-spacing: .08em;
  color: var(--ink-3); text-transform: uppercase;
}
.hero-frame-meta {
  font-family: "Geist Mono", ui-monospace, monospace;
  font-size: 10.5px; color: var(--ink-4); font-weight: 600;
  padding: 2px 7px; border-radius: 5px; background: var(--bg-soft); border: 1px solid var(--line);
}
.hero-frame-body {
  flex: 1; padding: 14px; display: flex; flex-direction: column; gap: 10px; justify-content: center;
}
.hero-pinboard {
  flex: 1; display: flex; flex-direction: column; gap: 10px; justify-content: center;
}
.bubble-row {
  display: flex; align-items: center; gap: 12px; padding: 11px 13px;
  background: #fff; border: 1px solid var(--line); border-radius: 12px;
  text-decoration: none; color: inherit;
  transition: transform .2s, border-color .2s, box-shadow .2s;
}
.bubble-row:hover {
  transform: translateX(2px);
  border-color: var(--green-300);
  box-shadow: 0 6px 18px -8px rgba(31,152,83,.25);
}
.bubble-num {
  width: 30px; height: 30px; border-radius: 8px; background: var(--green-500);
  color: var(--ink); font-weight: 800; font-size: 13px; display: grid; place-items: center; flex: none;
  font-family: "Geist Mono", ui-monospace, monospace;
}
.bubble-row.v2 .bubble-num { background: var(--purple); color: #fff; }
.bubble-row.v3 .bubble-num { background: var(--orange); color: #fff; }
.bubble-text { flex: 1; min-width: 0; line-height: 1.3; }
.bubble-speaker {
  font-family: "Geist Mono", ui-monospace, monospace;
  font-size: 10px; letter-spacing: .1em; text-transform: uppercase;
  color: var(--ink-4); font-weight: 600; margin-bottom: 3px;
}
.bubble-title {
  font-size: 13.5px; font-weight: 700; color: var(--ink);
  overflow: hidden; text-overflow: ellipsis; white-space: nowrap;
}
.bubble-tag {
  font-family: "Geist Mono", ui-monospace, monospace;
  font-size: 10px; letter-spacing: .08em; text-transform: uppercase; font-weight: 700;
  padding: 3px 7px; border-radius: 5px; flex: none;
}
.bubble-tag.green { background: var(--green-100); color: var(--green-700); }
.bubble-tag.purple { background: var(--purple-soft); color: var(--purple); }
.bubble-tag.orange { background: var(--orange-soft); color: var(--orange-ink); }

/* 浮动贴纸（对角线分布：右上 + 左下） */
.stamp-wrap { position: absolute; width: 130px; height: 130px; pointer-events: none; z-index: 3; }
.stamp-anchor { top: -10px; right: -12px; transform: rotate(-7deg); }
.stamp-list { bottom: -12px; left: -14px; width: 148px; transform: rotate(6deg); }
.stamp-float-slow { animation: float-slow 7s ease-in-out infinite; }
.stamp-float-medium { animation: float-medium 5.5s ease-in-out infinite; }
@keyframes float-slow {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-8px); }
}
@keyframes float-medium {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-6px); }
}
.stamp-anchor .stamp-float-slow,
.stamp-list .stamp-float-medium { display: block; width: 100%; height: 100%; }
.stamp-svg { width: 100%; height: 100%; }

/* ---------- Section ---------- */
.section { padding: 80px 0; position: relative; }
.all-section { background: var(--bg-warm); }
.section-head { margin-bottom: 48px; max-width: 780px; }
.section-head .eyebrow {
  display: inline-flex; align-items: center; gap: 8px;
  font-family: "Geist Mono", ui-monospace, monospace;
  font-size: 11px; letter-spacing: .16em; text-transform: uppercase;
  color: var(--ink-3); font-weight: 600;
}
.section-head .eyebrow .dot { width: 6px; height: 6px; border-radius: 50%; background: var(--green-500); }
.section-head h2 {
  margin-top: 14px; font-weight: 800; letter-spacing: -.02em; color: var(--ink);
  font-size: clamp(28px, 3.4vw, 42px); line-height: 1.15;
}
.section-head h2 .allCount,
.section-head h2 .pinnedCount {
  display: inline-block;
  font-family: "Geist Mono", ui-monospace, monospace;
  color: var(--green-700);
  padding: 0 10px;
  margin: 0 2px;
  border-radius: 8px;
  background: var(--green-100);
  vertical-align: 4px;
  font-size: 0.62em;
  letter-spacing: 0;
}
@media (prefers-color-scheme: dark) {
  .section-head h2 .allCount,
  .section-head h2 .pinnedCount { background: var(--green-50); color: var(--green-500); }
}
.section-head p { margin-top: 14px; font-size: 16px; color: var(--ink-3); max-width: 640px; }

/* ---------- 文章卡片网格 ---------- */
.article-grid {
  display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px;
}
.article-grid[data-state="loading"] { opacity: .6; }
.article-grid [hidden] { display: none; }
.article-empty, .article-error {
  grid-column: 1/-1; text-align: center;
  padding: 48px 20px; color: var(--ink-4); font-size: 14.5px;
  border: 1px dashed var(--line-2); border-radius: var(--radius-lg);
  background: var(--bg-soft);
}
a.article-card {
  position: relative; background: #fff; border: 1px solid var(--line-2);
  border-radius: var(--radius-lg); padding: 28px;
  box-shadow: var(--paper-shadow);
  display: flex; flex-direction: column; gap: 14px; min-height: 340px;
  color: inherit; cursor: pointer;
  transition: transform .25s, box-shadow .25s, border-color .25s;
}
a.article-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--paper-shadow-md);
  border-color: var(--green-300);
}

.card-head { display: flex; align-items: center; justify-content: space-between; gap: 10px; }
.card-head .num {
  font-family: "Geist Mono", ui-monospace, monospace;
  font-size: 12px; letter-spacing: .16em; color: var(--ink-4); font-weight: 600;
}
.badge {
  display: inline-flex; align-items: center; gap: 5px;
  font-family: "Geist Mono", ui-monospace, monospace;
  font-size: 10.5px; letter-spacing: .1em; text-transform: uppercase;
  padding: 4px 9px; border-radius: 6px; font-weight: 600;
  background: var(--green-100); color: var(--green-700);
}
.badge.purple { background: var(--purple-soft); color: var(--purple); }
.badge.orange { background: var(--orange-soft); color: var(--orange-ink); }
.badge.new {
  background: var(--green-500); color: var(--ink);
  box-shadow: 0 4px 12px -3px rgba(31,152,83,.45);
}
a.article-card h3 {
  font-weight: 800; color: var(--ink); letter-spacing: -.015em;
  font-size: clamp(20px, 1.6vw, 23px); line-height: 1.3;
}
a.article-card .desc {
  font-size: 14.5px; color: var(--ink-3); line-height: 1.65; flex: 1;
}
.card-tags { display: flex; flex-wrap: wrap; gap: 8px; margin-top: auto; padding-top: 4px; }
.tag {
  display: inline-flex; align-items: center;
  font-family: "Geist Mono", ui-monospace, monospace;
  font-size: 11px; letter-spacing: .04em;
  padding: 4px 10px; border-radius: 999px; font-weight: 500;
  background: var(--bg-warm); color: var(--ink-2);
  border: 1px solid var(--line-2);
}
.tag:hover { background: var(--green-50); border-color: var(--green-300); color: var(--green-700); }
.card-arrow {
  margin-top: 8px; display: inline-flex; align-items: center; gap: 6px;
  font-size: 13.5px; font-weight: 600; color: var(--green-700);
}
.card-arrow .arrow { transition: transform .2s; }
a.article-card:hover .card-arrow { color: var(--green-600); }
a.article-card:hover .arrow { transform: translateX(4px); }

/* 卡片底部置顶 chip（与阅读箭头同行） */
.card-foot {
  display: flex; align-items: baseline; justify-content: space-between;
  gap: 10px; margin-top: 8px;
}
.card-actions {
  display: inline-flex; align-items: center; gap: 6px;
  opacity: 0;
  transition: opacity .18s ease;
}
.article-card:hover .card-actions,
.article-card:focus-within .card-actions { opacity: 1; }
@media (prefers-reduced-motion: reduce) {
  .card-actions { transition: none; }
}
.info-btn {
  display: inline-flex; align-items: center; gap: 5px;
  font-family: "Geist Mono", ui-monospace, monospace;
  font-size: 10.5px; letter-spacing: .08em; text-transform: uppercase;
  font-weight: 600;
  padding: 4px 9px; border-radius: 6px;
  background: transparent; color: var(--ink-3);
  border: 1px solid var(--line);
  cursor: pointer;
  transition: background .15s, color .15s, border-color .15s;
}
.info-btn:hover { background: var(--purple-50, var(--green-50)); color: var(--purple-700, var(--green-700)); border-color: var(--purple-300, var(--green-300)); }
.info-btn svg { width: 11px; height: 11px; flex: none; }
.pin-chip {
  display: inline-flex; align-items: center; gap: 5px;
  font-family: "Geist Mono", ui-monospace, monospace;
  font-size: 10.5px; letter-spacing: .08em; text-transform: uppercase;
  font-weight: 600;
  padding: 4px 9px; border-radius: 6px;
  background: transparent; color: var(--ink-3);
  border: 1px solid var(--line);
  cursor: pointer;
  transition: background .15s, color .15s, border-color .15s;
}
.pin-chip:hover { background: var(--green-50); color: var(--green-700); border-color: var(--green-300); }
.pin-chip svg { width: 11px; height: 11px; flex: none; }
.pin-chip.is-pinned {
  background: var(--green-500); color: var(--ink);
  border-color: var(--green-700);
  box-shadow: 0 4px 12px -3px rgba(31,152,83,.45);
}
.pin-chip.is-pinned:hover { background: var(--green-700); color: var(--green-50); }

/* ---------- Upload modal ---------- */
.upload-trigger {
  background: transparent; border: none; cursor: pointer; padding: 0; margin: 0;
  font: inherit; letter-spacing: inherit; color: var(--ink-3);
  display: inline-flex; align-items: center; gap: 4px;
  transition: color .15s;
}
.upload-trigger:hover { color: var(--green-700); }
.upload-trigger:focus-visible {
  outline: 2px solid var(--green-500); outline-offset: 3px; border-radius: 3px;
}

/* Modal 容器 */
.upload-modal {
  position: fixed; inset: 0; z-index: 200;
  display: none; align-items: center; justify-content: center; padding: 24px;
}
.upload-modal[aria-hidden="false"] { display: flex; }
.upload-overlay {
  position: absolute; inset: 0;
  background: rgba(12,14,12,.42);
  backdrop-filter: blur(10px) saturate(1.2);
  -webkit-backdrop-filter: blur(10px) saturate(1.2);
  animation: upload-fade-in .22s ease-out;
}
@keyframes upload-fade-in { from { opacity: 0; } to { opacity: 1; } }
.upload-panel {
  position: relative; width: 100%; max-width: 520px; max-height: 90vh; overflow: auto;
  background: #fff; border: 1px solid var(--line-2); border-radius: 22px;
  box-shadow: 0 30px 80px -20px rgba(12,14,12,.42), inset 0 1px rgba(255,255,255,.5);
  animation: upload-panel-in .28s cubic-bezier(.22,1,.36,1);
}
@keyframes upload-panel-in {
  from { opacity: 0; transform: translateY(14px) scale(.97); }
  to { opacity: 1; transform: none; }
}
.upload-head { display: flex; align-items: center; justify-content: space-between; padding: 20px 24px 4px; }
.upload-head h3 { font-size: 17px; font-weight: 800; color: var(--ink); letter-spacing: -.01em; }
.upload-head .upload-head-sub { font-size: 12px; color: var(--ink-4); font-weight: 500; margin-top: 2px; }
.upload-close {
  width: 32px; height: 32px; border-radius: 8px; background: transparent; border: none; cursor: pointer;
  color: var(--ink-3); font-size: 22px; line-height: 1; display: grid; place-items: center;
  transition: background .15s, color .15s;
}
.upload-close:hover { background: var(--bg-soft); color: var(--ink); }
.upload-body { padding: 18px 24px 24px; }
.upload-view { display: none; }
.upload-body[data-state="idle"] .upload-view-form,
.upload-body[data-state="ready"] .upload-view-form { display: block; }
.upload-body[data-state="uploading"] .upload-view-uploading { display: block; }
.upload-body[data-state="success"] .upload-view-success { display: block; }
.upload-body[data-state="error"] .upload-view-error { display: block; }

/* Drop 区 */
.upload-drop {
  position: relative; border: 2px dashed var(--line-2); border-radius: 14px;
  background: var(--bg-soft);
  transition: border-color .18s, background .18s, transform .18s;
}
.upload-drop:hover { border-color: var(--green-300); }
.upload-drop.is-dragover {
  border-style: solid; border-color: var(--green-500);
  background: var(--green-50); transform: scale(1.005);
}
.upload-drop.has-file {
  border-style: solid; border-color: var(--green-200); background: #fff;
}
.upload-drop input[type=file] {
  position: absolute; inset: 0; opacity: 0; cursor: pointer; width: 100%; height: 100%;
}
.upload-drop-empty { padding: 32px 20px; text-align: center; pointer-events: none; }
.upload-drop-ico {
  width: 44px; height: 44px; margin: 0 auto 12px; border-radius: 12px;
  background: #fff; display: grid; place-items: center; color: var(--ink-3);
  box-shadow: inset 0 -2px 0 rgba(0,0,0,.04), 0 1px 0 rgba(0,0,0,.04);
  border: 1px solid var(--line);
}
.upload-drop-ico svg { width: 22px; height: 22px; }
.upload-drop-title { font-size: 14.5px; font-weight: 700; color: var(--ink); margin-bottom: 4px; }
.upload-drop-sub { font-size: 12.5px; color: var(--ink-4); }
.upload-drop-sub b { color: var(--green-700); font-weight: 600; }
.upload-drop-filled {
  display: flex; align-items: center; gap: 12px; padding: 14px 16px;
  pointer-events: none;
}
.upload-drop-filled-ico {
  width: 40px; height: 40px; border-radius: 10px; background: var(--green-100);
  color: var(--green-700); display: grid; place-items: center; flex: none;
}
.upload-drop-filled-ico svg { width: 20px; height: 20px; }
.upload-drop-filled-info { flex: 1; min-width: 0; }
.upload-drop-filled-name {
  font-size: 13.5px; font-weight: 700; color: var(--ink);
  white-space: nowrap; overflow: hidden; text-overflow: ellipsis;
}
.upload-drop-filled-size {
  font-size: 11.5px; color: var(--ink-4); margin-top: 2px;
  font-family: "Geist Mono", ui-monospace, monospace;
}
.file-remove {
  position: absolute; top: 8px; right: 8px; background: #fff; border: 1px solid var(--line);
  border-radius: 6px; padding: 4px 10px; font-size: 11.5px; color: var(--ink-2);
  cursor: pointer; font-weight: 600; pointer-events: auto;
  transition: background .15s, color .15s, border-color .15s;
}
.file-remove:hover { color: var(--ink); border-color: var(--line-2); background: var(--bg-soft); }
.upload-drop:not(.has-file) .upload-drop-filled { display: none; }
.upload-drop.has-file .upload-drop-empty { display: none; }
.upload-drop:not(.has-file) .file-remove { display: none; }

/* 路由输入 */
.upload-field { margin-top: 16px; }
.upload-field label {
  display: block; font-size: 12.5px; font-weight: 600; color: var(--ink-2);
  margin-bottom: 6px; letter-spacing: .02em;
}
.upload-input-wrap {
  display: flex; align-items: stretch;
  border: 1.5px solid var(--line-2); border-radius: 10px; background: #fff; overflow: hidden;
  transition: border-color .15s, box-shadow .15s;
}
.upload-input-wrap:focus-within {
  border-color: var(--green-500);
  box-shadow: 0 0 0 3px rgba(65,216,126,.18);
}
.upload-input-wrap.is-error {
  border-color: #e85a5a; box-shadow: 0 0 0 3px rgba(232,90,90,.15);
}
.upload-input-wrap .prefix {
  display: flex; align-items: center; padding: 0 12px; font-size: 12.5px;
  color: var(--ink-4); font-family: "Geist Mono", ui-monospace, monospace;
  background: var(--bg-soft); border-right: 1px solid var(--line-2);
  white-space: nowrap;
}
.upload-input-wrap input {
  flex: 1; border: none; outline: none; padding: 11px 14px; font-size: 13.5px;
  color: var(--ink); background: transparent;
  font-family: "Geist Mono", ui-monospace, monospace;
}
.upload-input-wrap input::placeholder { color: var(--ink-4); }
.upload-input-wrap textarea {
  flex: 1; border: none; outline: none; padding: 10px 14px; font-size: 13.5px;
  color: var(--ink); background: transparent;
  font-family: "Geist Mono", ui-monospace, monospace;
  resize: vertical; min-height: 44px; line-height: 1.5;
}
.upload-input-wrap textarea::placeholder { color: var(--ink-4); }
.upload-input-wrap-block { align-items: flex-start; }
.upload-input-wrap .upload-link-preview {
  flex: 1; padding: 11px 14px; font-size: 13.5px; color: var(--ink-2);
  font-family: "Geist Mono", ui-monospace, monospace;
  overflow: hidden; text-overflow: ellipsis; white-space: nowrap;
}
.upload-hint { margin-top: 6px; font-size: 11.5px; color: var(--ink-4); min-height: 1em; letter-spacing: .01em; }
.upload-hint.is-error { color: #d04545; }
.upload-meta-check {
  margin-top: 14px; padding: 12px 14px;
  border: 1px solid var(--line); border-radius: 10px;
  background: var(--bg-soft);
  font-size: 12.5px; color: var(--ink-3);
}
.upload-meta-check[hidden] { display: none; }
.upload-meta-check-title { font-weight: 600; color: var(--ink-2); margin-bottom: 8px; font-size: 12px; letter-spacing: .02em; }
.upload-meta-hint { margin: 0 0 8px; font-size: 11.5px; color: var(--ink-4); line-height: 1.55; }
.upload-meta-hint[hidden] { display: none; }
.upload-meta-list { list-style: none; margin: 0; padding: 0; display: flex; flex-direction: column; gap: 5px; }
.upload-meta-list li { display: flex; align-items: flex-start; gap: 8px; font-family: "Geist Mono", ui-monospace, monospace; font-size: 11.5px; line-height: 1.5; }
.upload-meta-list li .dot {
  flex-shrink: 0; margin-top: 5px; width: 8px; height: 8px; border-radius: 50%;
  background: var(--line-2); transition: background .2s;
}
.upload-meta-list li.ok .dot { background: var(--green-500); }
.upload-meta-list li.missing .dot { background: #ffb84d; }
.upload-meta-list li .txt { color: var(--ink-3); }
.upload-meta-list li.ok .txt { color: var(--ink-2); }
.upload-meta-list li.missing .txt { color: var(--ink-3); }
.upload-meta-warning {
  margin-top: 10px; padding-top: 10px; border-top: 1px dashed var(--line-2);
  font-size: 12px; color: #a36f1f; line-height: 1.55;
}
.upload-meta-warning[hidden] { display: none; }

/* 主提交按钮 */
.upload-submit {
  margin-top: 18px; width: 100%;
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  background: #0c0e0c; color: #fff; border: none; border-radius: 10px; padding: 13px 20px;
  font-size: 14px; font-weight: 600; cursor: pointer;
  box-shadow: inset 0 1px rgba(255,255,255,.06), 0 6px 16px -6px rgba(12,14,12,.3);
  transition: background .18s, transform .18s, box-shadow .18s;
}
.upload-submit:hover:not(:disabled) { background: #262926; }
.upload-submit:active:not(:disabled) { transform: translateY(1px); }
.upload-submit:disabled {
  background: var(--line-2); color: var(--ink-4); cursor: not-allowed; box-shadow: none;
}

/* 上传中 */
.upload-view-uploading { text-align: center; padding: 20px 0 12px; }
.upload-spinner {
  width: 46px; height: 46px; margin: 0 auto 14px; border-radius: 50%;
  border: 3px solid var(--green-100); border-top-color: var(--green-500);
  animation: upload-spin .8s linear infinite;
}
@keyframes upload-spin { to { transform: rotate(360deg); } }
.upload-view-uploading p { font-size: 14px; color: var(--ink-2); font-weight: 500; }

/* 成功 */
.upload-view-success { text-align: center; padding: 8px 0 4px; }
.upload-success-icon {
  width: 56px; height: 56px; margin: 0 auto 14px; border-radius: 50%;
  background: var(--green-500); color: #fff; display: grid; place-items: center;
  box-shadow: 0 10px 24px -6px rgba(31,152,83,.5);
  animation: upload-success-pop .42s cubic-bezier(.22,1,.36,1);
}
@keyframes upload-success-pop {
  0% { transform: scale(.5); opacity: 0; }
  60% { transform: scale(1.08); }
  100% { transform: scale(1); opacity: 1; }
}
.upload-success-icon svg { width: 26px; height: 26px; }
.upload-view-success h4 {
  font-size: 18px; font-weight: 800; color: var(--ink);
  margin-bottom: 6px; letter-spacing: -.01em;
}
.upload-view-success p { font-size: 13px; color: var(--ink-3); margin-bottom: 14px; }
.upload-result-link {
  display: block; padding: 12px 16px; background: var(--green-50);
  border: 1px solid var(--green-200); border-radius: 10px;
  font-family: "Geist Mono", ui-monospace, monospace; font-size: 12.5px;
  color: var(--green-ink); text-decoration: none; word-break: break-all;
  transition: background .15s, border-color .15s;
}
.upload-result-link:hover { background: var(--green-100); border-color: var(--green-300); }
.upload-result-link[hidden] { display: none; }
.upload-result-link:empty { display: none; }
.upload-action-secondary {
  margin-top: 14px; width: 100%;
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  background: #fff; border: 1px solid var(--line-2); border-radius: 10px;
  padding: 11px 20px; font-size: 13.5px; font-weight: 600; cursor: pointer; color: var(--ink-2);
  transition: background .15s, border-color .15s, color .15s;
}
.upload-action-secondary:hover { background: var(--bg-soft); border-color: var(--line-2); color: var(--ink); }

/* 错误 */
.upload-view-error { text-align: center; padding: 8px 0 4px; }
.upload-error-icon {
  width: 56px; height: 56px; margin: 0 auto 14px; border-radius: 50%;
  background: #fff0f0; color: #d04545; display: grid; place-items: center;
  border: 1.5px solid #f5c4c4;
}
.upload-error-icon svg { width: 26px; height: 26px; }
.upload-view-error h4 {
  font-size: 17px; font-weight: 800; color: var(--ink);
  margin-bottom: 6px; letter-spacing: -.01em;
}
.upload-view-error p { font-size: 13px; color: var(--ink-3); margin-bottom: 6px; line-height: 1.6; }
.upload-view-error p b { color: var(--ink); font-weight: 600; }
.upload-error-hint {
  display: inline-block; margin: 8px 0 14px; padding: 6px 12px;
  font-size: 11.5px; color: var(--ink-2);
  font-family: "Geist Mono", ui-monospace, monospace;
  background: var(--bg-soft); border-radius: 7px;
}
.upload-error-hint:empty { display: none; }

@media (prefers-reduced-motion: reduce) {
  .upload-overlay, .upload-panel, .upload-success-icon, .upload-spinner { animation: none !important; }
}
@media (max-width: 560px) {
  .upload-panel { border-radius: 18px; }
  .upload-head, .upload-body { padding-left: 20px; padding-right: 20px; }
}

/* ---------- Footer ---------- */
.site-footer {
  margin-top: 40px; padding: 48px 0 36px;
  border-top: 1px solid var(--line);
  background: var(--bg-soft);
}
.footer-grid {
  display: grid; grid-template-columns: 1.4fr 1fr 1fr; gap: 40px; align-items: start;
}
.footer-grid h4 {
  font-family: "Geist Mono", ui-monospace, monospace;
  font-size: 11px; letter-spacing: .18em; text-transform: uppercase;
  color: var(--ink-3); font-weight: 600; margin-bottom: 12px;
}
.footer-grid p { font-size: 13.5px; color: var(--ink-2); line-height: 1.7; }
.footer-grid .footer-brand { font-size: 15px; font-weight: 800; color: var(--ink); margin-bottom: 8px; }
.footer-grid .footer-note { font-size: 13px; color: var(--ink-3); margin-top: 6px; }
.footer-grid a { color: var(--ink-2); text-decoration: underline; text-decoration-color: var(--line-2); text-underline-offset: 3px; }
.footer-grid a:hover { color: var(--green-700); text-decoration-color: var(--green-400); }
.footer-meta {
  margin-top: 32px; padding-top: 20px; border-top: 1px dashed var(--line);
  font-family: "Geist Mono", ui-monospace, monospace;
  font-size: 11.5px; color: var(--ink-4); letter-spacing: .02em;
  display: flex; justify-content: space-between; flex-wrap: wrap; gap: 12px;
}

/* ---------- Responsive ---------- */
@media (max-width: 900px) {
  .hero { padding: 64px 0 48px; }
  .hero-grid { grid-template-columns: 1fr; gap: 40px; }
  .hero-illust { max-width: 480px; margin: 0 auto; }
  .section { padding: 56px 0; }
  .section-head { margin-bottom: 32px; }
  .article-grid { grid-template-columns: 1fr; gap: 14px; }
  a.article-card { min-height: 0; padding: 24px; }
  .footer-grid { grid-template-columns: 1fr; gap: 28px; }
  .container { padding: 0 20px; }
}
@media (max-width: 560px) {
  .topbar-inner { padding: 12px 0; }
  .brand-text small { display: none; }
  .nav-link { display: none; }
  .hero h1 { font-size: 42px; }
  .hero .sub { font-size: 16px; }
  .stamp-wrap { width: 96px; height: 96px; }
  .stamp-list { width: 112px; }
  .footer-meta { flex-direction: column; gap: 6px; }
}

/* ---------- 暗色主题（Test26 等价覆盖） ---------- */
@media (prefers-color-scheme: dark) {
  .topbar { background: rgba(14,20,17,.82); }
  .hero {
    background:
      radial-gradient(1100px 540px at 85% -8%, var(--green-50) 0%, transparent 60%),
      radial-gradient(800px 480px at -5% 35%, #1A2520 0%, transparent 60%),
      var(--bg);
  }
  :root {
    --green-50: #0E1F14;
    --green-100: #16301F;
    --green-200: #1F4628;
    --green-500: #41D87E;
    --green-600: #5AF39A;
    --green-700: #8FE5A9;
    --green-ink: #8FE5A9;
    --ink: #F5F8F6;
    --ink-2: #C7D2CC;
    --ink-3: #8FA399;
    --ink-4: #5E7269;
    --line: #1F2A24;
    --line-2: #2A3830;
    --bg: #0E1411;
    --bg-soft: #161E1A;
    --bg-warm: #1A1E15;
    --orange: #FFB85C;
    --orange-soft: #3A2A14;
    --orange-ink: #FFC857;
    --purple: #A48DFF;
    --purple-soft: #2A2148;
    --shadow-stamp: 0 1px 0 rgba(255,255,255,.04) inset, 0 18px 40px -12px rgba(0,0,0,.6);
    --paper-shadow: 0 1px 0 rgba(0,0,0,.4), 0 8px 24px -8px rgba(0,0,0,.5);
    --paper-shadow-md: 0 1px 0 rgba(0,0,0,.4), 0 18px 40px -12px rgba(0,0,0,.6);
  }
  /* Recolor surfaces for dark — Test26 uses #161E1A. */
  .hero-frame { background: #0E1411; }
  .hero-frame-bar { background: #161E1A; border-bottom-color: var(--line-2); }
  .hero-frame-meta { background: #0E1411; border-color: var(--line-2); }
  .bubble-row { background: #161E1A; border-color: var(--line-2); }
  .chip { background: var(--bg-soft); }
  .badge { background: var(--green-50); color: var(--green-500); }
  a.article-card { background: var(--bg-soft); }
  .tag { background: #1A2520; border-color: var(--line-2); color: var(--ink-2); }
  .tag:hover { background: var(--green-100); border-color: var(--green-700); color: var(--green-500); }
  .card-arrow { color: var(--green-500); }
  .upload-panel { background: var(--bg-soft); border-color: var(--line-2); }
  .upload-close:hover { background: #0E1411; }
  .upload-drop { background: #0E1411; }
  .upload-drop.is-dragover { background: rgba(65,216,126,.08); }
  .upload-drop.has-file { background: #1A2520; border-color: var(--green-700); }
  .upload-drop-ico { background: #1A2520; border-color: var(--line-2); color: var(--ink-2); }
  .upload-drop-filled-ico { background: var(--green-50); color: var(--green-500); }
  .file-remove { background: #1A2520; border-color: var(--line-2); color: var(--ink-2); }
  .upload-input-wrap { background: #1A2520; border-color: var(--line-2); }
  .upload-input-wrap .prefix { background: #0E1411; border-right-color: var(--line-2); }
  .upload-input-wrap.is-error { border-color: #ff8585; }
  .upload-meta-check { background: #0E1411; border-color: var(--line-2); }
  .upload-meta-warning { color: #ffb84d; }
  .upload-submit:disabled { background: #1A2520; }
  .upload-action-secondary { background: #1A2520; border-color: var(--line-2); color: var(--ink-2); }
  .upload-action-secondary:hover { background: #0E1411; }
  .upload-error-icon { background: #2A1414; color: #ff8585; border-color: #5a2828; }
  .upload-error-hint { background: #0E1411; }
  .upload-hint.is-error { color: #ff8585; }
  .upload-result-link { background: rgba(65,216,126,.08); border-color: var(--green-700); color: var(--green-500); }
  .upload-result-link:hover { background: rgba(65,216,126,.14); }
  .site-footer { background: #0A0F0C; }
  .footer-grid a:hover { color: var(--green-500); }
  .upload-trigger:hover { color: var(--green-500); }
  .hero-illust::before { opacity: .07; }
}