/* ===========================================================
   需求雷达 DemandRadar — 主样式
   移动优先 / 明暗双主题 / 无外部依赖
   =========================================================== */

:root {
  --bg: #f6f7fb;
  --bg-soft: #eef1f8;
  --card: #ffffff;
  --card-2: #fbfcfe;
  --text: #0e1729;
  --text-2: #38455c;
  --muted: #6b7891;
  --line: #e4e8f2;
  --line-strong: #d3d9e8;
  --accent: #5b5bd6;
  --accent-2: #8b5cf6;
  --accent-soft: #eef0ff;
  --ok: #10b981;
  --shadow-sm: 0 1px 2px rgba(16, 24, 40, .04), 0 1px 3px rgba(16, 24, 40, .06);
  --shadow-md: 0 6px 16px -6px rgba(16, 24, 40, .12), 0 2px 6px rgba(16, 24, 40, .05);
  --shadow-lg: 0 24px 60px -20px rgba(16, 24, 40, .28);
  --radius: 18px;
  --radius-sm: 12px;
  --maxw: 1200px;
  --gutter: 18px;
  --header-h: 62px;
  --ease: cubic-bezier(.22, .61, .36, 1);
}

html[data-theme="dark"] {
  --bg: #080d18;
  --bg-soft: #0d1424;
  --card: #111a2c;
  --card-2: #0e1626;
  --text: #e9edf7;
  --text-2: #c2cbdd;
  --muted: #8b99b3;
  --line: #1e2a42;
  --line-strong: #2a3854;
  --accent: #8b8cf7;
  --accent-2: #a78bfa;
  --accent-soft: #1b2140;
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, .3);
  --shadow-md: 0 10px 24px -12px rgba(0, 0, 0, .7);
  --shadow-lg: 0 30px 70px -24px rgba(0, 0, 0, .8);
}

* { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; scroll-padding-top: calc(var(--header-h) + 76px); }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Inter", "PingFang SC",
    "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", sans-serif;
  font-size: 15px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

body.no-scroll { overflow: hidden; }

a { color: inherit; text-decoration: none; }
button { font-family: inherit; cursor: pointer; }
img, svg { display: block; }

::selection { background: color-mix(in srgb, var(--accent) 24%, transparent); }

.icon {
  width: 18px; height: 18px;
  stroke: currentColor;
  stroke-width: 1.7;
  fill: none;
  stroke-linecap: round;
  stroke-linejoin: round;
  flex: none;
}

/* ---------- 语言切换（静态页用 CSS 控制，爬虫可同时看到中英） ---------- */
html[data-lang="zh"] .l-en { display: none !important; }
html[data-lang="en"] .l-zh { display: none !important; }

/* ---------- 布局容器 ---------- */
.wrap {
  width: 100%;
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 0 var(--gutter);
}

/* ---------- Header ---------- */
.header {
  position: sticky; top: 0; z-index: 60;
  height: var(--header-h);
  background: color-mix(in srgb, var(--bg) 82%, transparent);
  backdrop-filter: saturate(180%) blur(14px);
  -webkit-backdrop-filter: saturate(180%) blur(14px);
  border-bottom: 1px solid color-mix(in srgb, var(--line) 70%, transparent);
}
.header .wrap { height: 100%; display: flex; align-items: center; gap: 12px; }

.brand { display: flex; align-items: center; gap: 10px; font-weight: 700; letter-spacing: -.01em; min-width: 0; }
.brand-mark {
  width: 34px; height: 34px; border-radius: 11px; flex: none;
  background: linear-gradient(150deg, var(--accent), var(--accent-2));
  display: grid; place-items: center;
  box-shadow: 0 6px 14px -6px color-mix(in srgb, var(--accent) 70%, transparent);
}
.brand-mark .icon { width: 19px; height: 19px; stroke: #fff; stroke-width: 1.9; }
.brand-name { display: block; font-size: 15.5px; line-height: 1.15; white-space: nowrap; }
.brand-sub { display: block; font-size: 11px; font-weight: 500; color: var(--muted); letter-spacing: .02em; white-space: nowrap; }

.nav { margin-left: auto; display: flex; align-items: center; gap: 2px; }
.nav a {
  padding: 7px 11px; border-radius: 9px; font-size: 13.5px; color: var(--text-2); font-weight: 500;
  transition: background .18s, color .18s;
  white-space: nowrap;
}
.nav a:hover { background: var(--bg-soft); color: var(--text); }
.nav a.active { color: var(--accent); background: var(--accent-soft); }

.icon-btn {
  width: 36px; height: 36px; border-radius: 10px; flex: none;
  border: 1px solid var(--line); background: var(--card); color: var(--text-2);
  display: grid; place-items: center;
  transition: transform .18s var(--ease), border-color .18s, color .18s, background .18s;
}
.icon-btn:hover { color: var(--accent); border-color: color-mix(in srgb, var(--accent) 40%, var(--line)); }
.icon-btn:active { transform: scale(.94); }

/* 语言下拉选择器 */
.lang-dd { position: relative; flex: none; }
.lang-dd summary { list-style: none; }
.lang-dd summary::-webkit-details-marker { display: none; }
.lang-btn {
  display: inline-flex; align-items: center; gap: 5px;
  border: 1px solid var(--line); background: var(--card);
  border-radius: 10px; padding: 7px 11px;
  font-size: 13px; font-weight: 600; color: var(--text);
  cursor: pointer; white-space: nowrap; line-height: 1.2;
  transition: all .18s;
}
.lang-btn:hover { color: var(--accent); border-color: color-mix(in srgb, var(--accent) 40%, var(--line)); }
.lang-caret { width: 14px; height: 14px; transition: transform .18s; }
.lang-dd[open] .lang-caret { transform: rotate(180deg); }
.lang-dd[open] .lang-btn { color: var(--accent); border-color: color-mix(in srgb, var(--accent) 40%, var(--line)); }
.lang-menu {
  position: absolute; right: 0; top: calc(100% + 6px); z-index: 60;
  min-width: 150px; padding: 6px;
  background: var(--card); border: 1px solid var(--line);
  border-radius: 12px; box-shadow: 0 10px 28px rgba(0,0,0,.16);
  display: flex; flex-direction: column; gap: 2px;
}
.lang-item {
  display: flex; align-items: center; justify-content: space-between; gap: 10px;
  padding: 7px 10px; border-radius: 8px;
  font-size: 13px; color: var(--text); text-decoration: none; white-space: nowrap;
}
.lang-item:hover { background: color-mix(in srgb, var(--accent) 10%, transparent); }
.lang-item.on { background: var(--accent); color: #fff; font-weight: 600; }
.lang-item.on:hover { background: var(--accent); }
@media (max-width: 620px) {
  .lang-menu { position: fixed; right: 10px; left: 10px; top: 58px; min-width: 0; }
}

/* ---------- Hero ---------- */
.hero { position: relative; overflow: hidden; padding: 46px 0 34px; }
.hero::before, .hero::after {
  content: ""; position: absolute; border-radius: 50%; filter: blur(70px);
  opacity: .5; pointer-events: none; z-index: 0;
}
.hero::before {
  width: 520px; height: 520px; top: -280px; left: -140px;
  background: radial-gradient(circle at 30% 30%, #a5b4fc, transparent 70%);
}
.hero::after {
  width: 460px; height: 460px; top: -200px; right: -120px;
  background: radial-gradient(circle at 60% 40%, #f0abfc, transparent 70%);
}
html[data-theme="dark"] .hero::before { background: radial-gradient(circle at 30% 30%, #3730a3, transparent 70%); opacity: .55; }
html[data-theme="dark"] .hero::after { background: radial-gradient(circle at 60% 40%, #4c1d95, transparent 70%); opacity: .5; }

.hero .wrap { position: relative; z-index: 1; }

.hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 356px;
  gap: 44px;
  align-items: start;
}

.eyebrow {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 5px 12px 5px 8px; border-radius: 999px;
  background: var(--card); border: 1px solid var(--line);
  font-size: 12.5px; color: var(--text-2); font-weight: 500;
  box-shadow: var(--shadow-sm);
}
.eyebrow .dot {
  width: 7px; height: 7px; border-radius: 50%; background: var(--ok);
  box-shadow: 0 0 0 3px color-mix(in srgb, var(--ok) 20%, transparent);
  animation: pulse 2.4s infinite;
}
@keyframes pulse {
  0%, 100% { box-shadow: 0 0 0 3px color-mix(in srgb, var(--ok) 18%, transparent); }
  50% { box-shadow: 0 0 0 6px color-mix(in srgb, var(--ok) 6%, transparent); }
}

h1.hero-title {
  margin: 16px 0 0;
  font-size: clamp(28px, 3.3vw, 44px);
  line-height: 1.18;
  letter-spacing: -.025em;
  font-weight: 800;
}
h1.hero-title .grad {
  background: linear-gradient(100deg, var(--accent), var(--accent-2) 60%, #ec4899);
  -webkit-background-clip: text; background-clip: text; color: transparent;
}
.hero-desc {
  margin: 14px 0 0; max-width: 660px;
  color: var(--text-2); font-size: clamp(14px, 1.5vw, 16px); line-height: 1.75;
}

/* search */
.search-shell {
  margin-top: 22px; display: flex; gap: 10px; max-width: 620px;
}
.search-box {
  flex: 1; display: flex; align-items: center; gap: 10px; min-width: 0;
  background: var(--card); border: 1px solid var(--line-strong);
  border-radius: 14px; padding: 0 14px; height: 50px;
  box-shadow: var(--shadow-sm);
  transition: border-color .2s, box-shadow .2s;
}
.search-box:focus-within {
  border-color: color-mix(in srgb, var(--accent) 55%, var(--line));
  box-shadow: 0 0 0 4px color-mix(in srgb, var(--accent) 12%, transparent);
}
.search-box .icon { color: var(--muted); }
.search-box input {
  flex: 1; border: 0; outline: 0; background: transparent;
  font-size: 15px; color: var(--text); min-width: 0;
}
.search-box input::placeholder { color: var(--muted); }
.search-box input::-webkit-search-cancel-button,
.search-box input::-webkit-search-decoration { -webkit-appearance: none; appearance: none; }
.search-clear {
  border: 0; background: var(--bg-soft); color: var(--muted);
  width: 22px; height: 22px; border-radius: 50%;
  display: none; place-items: center; font-size: 13px; line-height: 1;
}
.search-clear.show { display: grid; }

.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  height: 50px; padding: 0 18px; border-radius: 14px;
  font-size: 14px; font-weight: 600;
  border: 1px solid var(--line-strong); background: var(--card); color: var(--text);
  box-shadow: var(--shadow-sm);
  transition: transform .16s var(--ease), box-shadow .2s, border-color .2s, background .2s;
  white-space: nowrap;
}
.btn:hover { border-color: color-mix(in srgb, var(--accent) 40%, var(--line-strong)); }
.btn:active { transform: translateY(1px) scale(.99); }
.btn-primary {
  background: linear-gradient(140deg, var(--accent), var(--accent-2));
  border-color: transparent; color: #fff;
  box-shadow: 0 10px 24px -12px color-mix(in srgb, var(--accent) 90%, transparent);
}
.btn-primary:hover { filter: brightness(1.04); }
.btn-sm { height: 38px; padding: 0 12px; border-radius: 10px; font-size: 12.5px; gap: 6px; }
.btn-sm .icon { width: 15px; height: 15px; }

/* ---------- 数据面板 ---------- */
.hero-panel {
  background: color-mix(in srgb, var(--card) 86%, transparent);
  border: 1px solid var(--line);
  border-radius: 20px;
  padding: 16px;
  box-shadow: var(--shadow-md);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
}
.panel-head {
  display: flex; align-items: center; gap: 8px;
  font-size: 11.5px; font-weight: 650; letter-spacing: .06em; text-transform: uppercase;
  color: var(--muted);
  padding-bottom: 12px; margin-bottom: 12px;
  border-bottom: 1px dashed var(--line);
}
.panel-head .dot {
  width: 6px; height: 6px; border-radius: 50%; background: var(--ok);
  box-shadow: 0 0 0 3px color-mix(in srgb, var(--ok) 18%, transparent);
}
.panel-head .live { margin-left: auto; font-size: 10.5px; color: var(--ok); letter-spacing: .02em; text-transform: none; }

.stats { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 8px; }
.stat {
  background: var(--card-2);
  border: 1px solid var(--line); border-radius: 13px;
  padding: 11px 12px;
}
.stat b { display: block; font-size: 20px; font-weight: 750; letter-spacing: -.02em; line-height: 1.25; font-variant-numeric: tabular-nums; }
.stat span { font-size: 11.5px; color: var(--muted); letter-spacing: .01em; }
.panel-note { margin: 12px 0 0; font-size: 11.5px; line-height: 1.65; color: var(--muted); }
.panel-note b { color: var(--text-2); font-weight: 600; }

/* ---------- Category nav ---------- */
.cat-bar {
  position: sticky; top: var(--header-h); z-index: 40;
  background: color-mix(in srgb, var(--bg) 90%, transparent);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid color-mix(in srgb, var(--line) 70%, transparent);
}
.cat-wrap {
  position: relative;
  max-width: var(--maxw); margin: 0 auto; padding: 9px var(--gutter);
}
.cat-wrap::before, .cat-wrap::after {
  content: ""; position: absolute; top: 0; bottom: 0; width: 46px;
  pointer-events: none; z-index: 2; opacity: 0; transition: opacity .22s;
}
.cat-wrap::before { left: 0; background: linear-gradient(90deg, var(--bg) 30%, transparent); }
.cat-wrap::after { right: 0; background: linear-gradient(270deg, var(--bg) 30%, transparent); }
.cat-bar.has-overflow .cat-wrap::after { opacity: 1; }
.cat-bar.has-overflow.is-scrolled .cat-wrap::before { opacity: 1; }
.cat-scroll {
  display: flex; gap: 8px; overflow-x: auto;
  padding: 2px 1px 4px;
  scrollbar-width: none; -webkit-overflow-scrolling: touch;
  scroll-behavior: smooth;
  cursor: grab;
}
.cat-scroll::-webkit-scrollbar { display: none; }
.cat-scroll.dragging { cursor: grabbing; scroll-behavior: auto; }
.cat-scroll.dragging .chip { pointer-events: none; }

.chip {
  display: inline-flex; align-items: center; gap: 7px;
  padding: 7px 12px; border-radius: 999px;
  border: 1px solid var(--line); background: var(--card); color: var(--text-2);
  font-size: 12.8px; font-weight: 550; white-space: nowrap;
  transition: all .18s var(--ease);
}
.chip:hover { border-color: var(--line-strong); transform: translateY(-1px); }
.chip .c-dot { width: 7px; height: 7px; border-radius: 50%; background: currentColor; opacity: .9; }
.chip .c-count {
  font-size: 11px; font-weight: 600; color: var(--muted);
  background: var(--bg-soft); padding: 1px 6px; border-radius: 999px;
}
.chip[aria-pressed="true"] {
  color: #fff; border-color: transparent;
  background: linear-gradient(140deg, var(--accent), var(--accent-2));
  box-shadow: 0 8px 20px -12px color-mix(in srgb, var(--accent) 90%, transparent);
}
.chip[aria-pressed="true"] .c-count { background: rgba(255, 255, 255, .22); color: #fff; }

/* ---------- Toolbar ---------- */
.toolbar {
  display: flex; align-items: center; gap: 10px; flex-wrap: wrap;
  padding: 18px 0 4px;
}
.result-line { font-size: 13px; color: var(--muted); margin-right: auto; }
.result-line b { color: var(--text); font-weight: 650; }
.tool-group { display: flex; align-items: center; gap: 8px; }
.seg {
  display: flex; gap: 2px; padding: 3px;
  background: var(--bg-soft); border-radius: 11px; border: 1px solid var(--line);
}
.seg button {
  border: 0; background: transparent; color: var(--muted);
  font-size: 12.5px; font-weight: 600; padding: 6px 11px; border-radius: 8px;
  transition: all .16s;
}
.seg button[aria-pressed="true"] { background: var(--card); color: var(--text); box-shadow: var(--shadow-sm); }

.toggle-fav {
  display: inline-flex; align-items: center; gap: 6px;
  height: 34px; padding: 0 12px; border-radius: 10px;
  border: 1px solid var(--line); background: var(--card); color: var(--text-2);
  font-size: 12.5px; font-weight: 600;
}
.toggle-fav[aria-pressed="true"] { color: #e11d48; border-color: #fecdd3; background: #fff1f2; }
html[data-theme="dark"] .toggle-fav[aria-pressed="true"] { background: #2a1220; border-color: #4c1d34; }
.toggle-fav .icon { width: 15px; height: 15px; }
.toggle-fav[aria-pressed="true"] .icon { fill: currentColor; }

/* ---------- Grid & cards ---------- */
.grid {
  display: grid; gap: 14px; padding: 12px 0 8px;
  grid-template-columns: repeat(auto-fill, minmax(330px, 1fr));
}
.card {
  position: relative;
  display: flex; flex-direction: column; gap: 10px;
  padding: 16px 16px 13px;
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow-sm);
  overflow: hidden;
  transition: transform .22s var(--ease), box-shadow .22s var(--ease), border-color .22s;
  opacity: 0; transform: translateY(10px);
}
.card.in { opacity: 1; transform: none; }
.card::after {
  content: ""; position: absolute; inset: 0 0 auto 0; height: 2px;
  background: linear-gradient(90deg, var(--cat-color, var(--accent)), transparent 85%);
  opacity: .7;
}
.card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-md);
  border-color: color-mix(in srgb, var(--cat-color, var(--accent)) 34%, var(--line));
}
.card:focus-within { border-color: color-mix(in srgb, var(--accent) 50%, var(--line)); }

.card-top { display: flex; align-items: center; gap: 8px; font-size: 11.5px; color: var(--muted); }
.platform {
  display: inline-flex; align-items: center; gap: 5px;
  padding: 3px 8px; border-radius: 7px;
  background: color-mix(in srgb, var(--cat-color, var(--accent)) 10%, var(--card));
  color: color-mix(in srgb, var(--cat-color, var(--accent)) 78%, var(--text));
  font-weight: 650; letter-spacing: .01em;
  border: 1px solid color-mix(in srgb, var(--cat-color, var(--accent)) 18%, transparent);
  max-width: 62%; overflow: hidden; text-overflow: ellipsis; white-space: nowrap;
}
.card-date { margin-left: auto; font-variant-numeric: tabular-nums; }

.card-title {
  margin: 0; font-size: 15.5px; font-weight: 680; line-height: 1.45;
  letter-spacing: -.012em;
  display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden;
  min-height: 2.9em;
}
.card-title a { color: inherit; }
.card-title a::after { content: ""; position: absolute; inset: 0; z-index: 1; border-radius: inherit; }
.card-title a:focus-visible { outline: none; }
.card-quote {
  margin: 0; font-size: 13px; line-height: 1.62; color: var(--muted);
  display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden;
  padding-left: 10px; border-left: 2px solid color-mix(in srgb, var(--cat-color, var(--accent)) 30%, var(--line));
  font-style: italic;
}
.card-tags { display: flex; flex-wrap: wrap; gap: 5px; }
.tag {
  font-size: 11px; padding: 3px 8px; border-radius: 6px;
  background: var(--bg-soft); color: var(--text-2); font-weight: 550;
  white-space: nowrap;
}
.card-foot {
  margin-top: auto; padding-top: 10px;
  border-top: 1px dashed var(--line);
  display: flex; align-items: center; gap: 9px;
  font-size: 11.5px; color: var(--muted);
}
.meter { display: flex; align-items: center; gap: 4px; flex: none; }
.meter i {
  width: 6px; height: 6px; border-radius: 50%;
  background: var(--line-strong); display: block;
}
.engagement { display: inline-flex; align-items: center; gap: 4px; min-width: 0; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.engagement .icon { width: 13px; height: 13px; }

.card-fav {
  margin-left: auto; flex: none; position: relative; z-index: 2;
  width: 28px; height: 28px; border-radius: 8px; display: grid; place-items: center;
  border: 1px solid transparent; background: transparent; color: var(--muted);
  transition: color .18s, background .18s, border-color .18s;
}
.card-fav:hover { color: #e11d48; background: #fff1f2; border-color: #fecdd3; }
.card-fav[aria-pressed="true"] { color: #e11d48; }
.card-fav[aria-pressed="true"] .icon { fill: currentColor; }
html[data-theme="dark"] .card-fav:hover { background: #2a1220; border-color: #4c1d34; }
.card-fav .icon { width: 15px; height: 15px; }

/* empty */
.empty {
  text-align: center; padding: 70px 20px; color: var(--muted);
  border: 1px dashed var(--line-strong); border-radius: var(--radius);
  background: var(--card-2); margin: 12px 0;
}
.empty .icon { width: 34px; height: 34px; margin: 0 auto 12px; color: var(--line-strong); }
.empty h3 { margin: 0 0 6px; color: var(--text); font-size: 16px; }
.empty p { margin: 0; font-size: 13.5px; }

/* ---------- Sections ---------- */
.section { padding: 46px 0; }
.section-head { max-width: 680px; margin-bottom: 22px; }
.section-head h2 {
  margin: 0 0 8px; font-size: clamp(21px, 2.6vw, 28px); letter-spacing: -.02em; font-weight: 780;
}
.section-head p { margin: 0; color: var(--text-2); font-size: 14.5px; line-height: 1.75; }

.steps { display: grid; gap: 12px; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); }
.step {
  padding: 18px; border-radius: var(--radius); background: var(--card);
  border: 1px solid var(--line); box-shadow: var(--shadow-sm);
}
.step .num {
  width: 26px; height: 26px; border-radius: 8px; display: grid; place-items: center;
  background: var(--accent-soft); color: var(--accent); font-size: 12.5px; font-weight: 750;
  margin-bottom: 10px;
}
.step h3 { margin: 0 0 6px; font-size: 15px; font-weight: 680; }
.step p { margin: 0; font-size: 13.3px; line-height: 1.7; color: var(--muted); }

.sources { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 18px; }
.source-pill {
  display: inline-flex; align-items: center; gap: 6px;
  padding: 7px 12px; border-radius: 999px; font-size: 12.5px; font-weight: 550;
  background: var(--card); border: 1px solid var(--line); color: var(--text-2);
}
.source-pill b { color: var(--text); font-weight: 650; }

/* ---------- Footer ---------- */
.footer {
  border-top: 1px solid var(--line);
  margin-top: 30px; padding: 30px 0 40px;
  background: var(--bg-soft);
}
.footer .wrap { display: flex; flex-wrap: wrap; gap: 22px; align-items: flex-start; }
.footer-brand { flex: 1 1 260px; }
.footer-brand p { margin: 10px 0 0; font-size: 12.8px; color: var(--muted); line-height: 1.7; max-width: 380px; }
.footer-col { flex: 0 1 150px; }
.footer-col-wide { flex: 0 1 190px; }
.footer-col h5 { margin: 0 0 8px; font-size: 12px; letter-spacing: .06em; text-transform: uppercase; color: var(--muted); }
.footer-col a { display: block; font-size: 13px; color: var(--text-2); padding: 3px 0; }
.footer-col a:hover { color: var(--accent); }
.footer-bottom {
  margin-top: 22px; padding-top: 16px; border-top: 1px solid var(--line);
  font-size: 12px; color: var(--muted); display: flex; flex-wrap: wrap; gap: 10px;
}
.footer-bottom span { margin-right: auto; }

/* ---------- 面包屑 ---------- */
.breadcrumb {
  display: flex; align-items: center; flex-wrap: wrap; gap: 7px;
  padding: 18px 0 0; font-size: 12.5px; color: var(--muted);
}
.breadcrumb a { color: var(--muted); }
.breadcrumb a:hover { color: var(--accent); }
.bc-sep { opacity: .5; }
.bc-here { color: var(--text-2); max-width: 60ch; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }

/* ---------- 详情页 ---------- */
.detail-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 316px;
  gap: 44px;
  align-items: start;
  padding-top: 18px;
  padding-bottom: 56px;
}
.detail-main { max-width: 760px; min-width: 0; }

.d-kicker { display: flex; align-items: center; gap: 10px; flex-wrap: wrap; margin-bottom: 10px; }
.d-cat {
  display: inline-flex; align-items: center; gap: 6px;
  padding: 4px 10px; border-radius: 7px; font-size: 12px; font-weight: 650;
  color: color-mix(in srgb, var(--cat-color, var(--accent)) 80%, var(--text));
  background: color-mix(in srgb, var(--cat-color, var(--accent)) 12%, var(--card));
  border: 1px solid color-mix(in srgb, var(--cat-color, var(--accent)) 22%, transparent);
}
.d-src { font-size: 12.5px; color: var(--muted); }

.d-h1 {
  margin: 0; font-size: clamp(23px, 2.6vw, 33px); line-height: 1.32;
  letter-spacing: -.022em; font-weight: 780;
}
.d-sub { margin: 10px 0 0; font-size: 14.5px; line-height: 1.65; color: var(--muted); }

.summary {
  margin: 22px 0 0; padding: 16px 18px;
  background: linear-gradient(150deg, color-mix(in srgb, var(--accent) 9%, var(--card)), var(--card) 70%);
  border: 1px solid color-mix(in srgb, var(--accent) 18%, var(--line));
  border-radius: 14px;
}
.summary-head {
  display: flex; align-items: center; gap: 7px;
  font-size: 11.5px; font-weight: 700; letter-spacing: .06em; text-transform: uppercase;
  color: color-mix(in srgb, var(--accent) 82%, var(--text));
  margin-bottom: 10px;
}
.summary-head .icon { width: 14px; height: 14px; }
.summary ul { margin: 0; padding: 0; list-style: none; display: grid; gap: 8px; }
.summary li { font-size: 13.8px; line-height: 1.7; color: var(--text-2); padding-left: 14px; position: relative; }
.summary li::before {
  content: ""; position: absolute; left: 0; top: .62em;
  width: 5px; height: 5px; border-radius: 50%; background: color-mix(in srgb, var(--accent) 60%, transparent);
}
.summary li b { color: var(--text); font-weight: 680; margin-right: 6px; }

.article-block { margin-top: 34px; }
.article-block h2 {
  margin: 0 0 12px; font-size: 19px; letter-spacing: -.012em; font-weight: 720;
  padding-bottom: 8px; border-bottom: 1px solid var(--line);
}
.article-block h3 { margin: 22px 0 8px; font-size: 15px; font-weight: 680; }
.article-block p { margin: 0 0 12px; font-size: 14.8px; line-height: 1.85; color: var(--text-2); }
.article-block p:last-child { margin-bottom: 0; }

.quote-card {
  margin: 0; padding: 18px 18px 16px;
  background: var(--card);
  border: 1px solid var(--line);
  border-left: 3px solid var(--cat-color, var(--accent));
  border-radius: 4px 14px 14px 4px;
}
.quote-card .q-en {
  margin: 0; font-size: 15px; line-height: 1.7; color: var(--text);
  font-style: italic;
}
.quote-card .q-zh {
  margin: 12px 0 0; padding-top: 12px; border-top: 1px dashed var(--line);
  font-size: 13.8px; line-height: 1.8; color: var(--text-2);
}
.quote-card cite {
  display: block; margin-top: 12px;
  font-size: 11.5px; font-style: normal; color: var(--muted);
  word-break: break-all;
}
.quote-card cite a { color: var(--muted); text-decoration: underline; text-decoration-style: dotted; text-underline-offset: 2px; }
.quote-card cite a:hover { color: var(--accent); }

.pain-box, .idea-box {
  margin: 4px 0 0; padding: 14px 16px;
  background: var(--card-2);
  border: 1px solid var(--line);
  border-radius: 12px;
}
.idea-box { background: color-mix(in srgb, var(--cat-color, var(--accent)) 6%, var(--card)); border-color: color-mix(in srgb, var(--cat-color, var(--accent)) 18%, var(--line)); }
.pain-label {
  display: flex; align-items: center; gap: 6px;
  font-size: 11.5px; font-weight: 700; letter-spacing: .05em; text-transform: uppercase;
  color: var(--muted); margin-bottom: 7px;
}
.pain-label .icon { width: 14px; height: 14px; color: var(--cat-color, var(--accent)); }
.pain-box p, .idea-box p { margin: 0; font-size: 14.5px; line-height: 1.82; color: var(--text); }

.checklist { margin: 0; padding-left: 22px; display: grid; gap: 8px; }
.checklist li { font-size: 14.2px; line-height: 1.75; color: var(--text-2); }
.checklist li::marker { color: var(--cat-color, var(--accent)); font-weight: 700; }

.demand-row { display: flex; align-items: center; gap: 16px; flex-wrap: wrap; }
.demand-score { display: flex; align-items: baseline; gap: 3px; color: var(--cat-color, var(--accent)); }
.demand-score b { font-size: 34px; font-weight: 800; letter-spacing: -.03em; line-height: 1; }
.demand-score span { font-size: 13px; color: var(--muted); }
.demand-bars { display: flex; gap: 5px; }
.demand-bars i { width: 26px; height: 8px; border-radius: 4px; background: var(--line); display: block; }
.demand-note { flex: 1 1 240px; margin: 0 !important; font-size: 12.5px !important; color: var(--muted) !important; line-height: 1.65 !important; }

.faq-item {
  border: 1px solid var(--line); border-radius: 12px; background: var(--card);
  padding: 0 14px; margin-bottom: 8px;
}
.faq-item summary {
  cursor: pointer; padding: 12px 0; font-size: 14.2px; font-weight: 620; color: var(--text);
  list-style: none; display: flex; align-items: center; gap: 8px;
}
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary::before {
  content: "+"; color: var(--accent); font-weight: 700; font-size: 15px; width: 12px; display: inline-block;
}
.faq-item[open] summary::before { content: "−"; }
.faq-a {
  padding: 0 0 13px 20px; font-size: 13.8px; line-height: 1.82; color: var(--text-2);
  word-break: break-word;
}

.related { list-style: none; margin: 0; padding: 0; display: grid; gap: 8px; }
.related a {
  display: block; padding: 12px 14px;
  background: var(--card); border: 1px solid var(--line); border-radius: 12px;
  transition: border-color .18s, transform .18s;
}
.related a:hover { border-color: color-mix(in srgb, var(--accent) 40%, var(--line)); transform: translateX(2px); }
.rel-meta { display: block; font-size: 11px; color: var(--muted); margin-bottom: 3px; }
.rel-title { display: block; font-size: 14px; font-weight: 630; color: var(--text); line-height: 1.5; }
.rel-pain { display: block; margin-top: 3px; font-size: 12.5px; color: var(--muted); }

.detail-cta { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 34px; }
.detail-cta .btn { height: 44px; font-size: 13.5px; border-radius: 12px; }

/* 侧栏 */
.detail-side { position: sticky; top: calc(var(--header-h) + 18px); display: grid; gap: 14px; }
.side-card {
  background: var(--card); border: 1px solid var(--line); border-radius: 16px;
  padding: 15px 15px 14px; box-shadow: var(--shadow-sm);
}
.side-card h3 {
  margin: 0 0 10px; font-size: 12px; letter-spacing: .06em; text-transform: uppercase;
  color: var(--muted); font-weight: 700;
}
.fact-list { margin: 0; display: grid; gap: 8px; }
.fact-list > div { display: flex; align-items: baseline; justify-content: space-between; gap: 10px; }
.fact-list dt { font-size: 12.5px; color: var(--muted); flex: none; }
.fact-list dd { margin: 0; font-size: 12.8px; color: var(--text); font-weight: 600; text-align: right; }
.fact-list dd a { color: var(--accent); }
.side-tags { display: flex; flex-wrap: wrap; gap: 5px; margin-top: 12px; }
.side-actions { display: flex; gap: 6px; margin-top: 13px; }
.side-actions .btn { flex: 1 1 0; }
.side-actions .btn[aria-pressed="true"] { color: #e11d48; border-color: #fecdd3; }
.side-actions .btn[aria-pressed="true"] .icon { fill: currentColor; }

.side-list { list-style: none; margin: 0; padding: 0; display: grid; gap: 2px; }
.side-list a { display: block; padding: 7px 8px; border-radius: 8px; transition: background .16s; }
.side-list a:hover { background: var(--bg-soft); }
.side-list b {
  display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden;
  font-size: 12.8px; font-weight: 600; line-height: 1.5; color: var(--text-2);
}
.side-list span { display: block; font-size: 10.8px; color: var(--muted); margin-top: 2px; }
.side-more {
  display: flex; align-items: center; gap: 5px; margin-top: 10px; padding-top: 10px;
  border-top: 1px dashed var(--line); font-size: 12.3px; font-weight: 600; color: var(--accent);
}
.side-more .icon { width: 14px; height: 14px; }

/* ---------- 分类 / 总览页 ---------- */
.page-hero { padding: 26px 0 8px; position: relative; }
.page-hero-row { max-width: 760px; }
.cat-badge {
  display: inline-flex; align-items: center; gap: 6px;
  padding: 4px 10px; border-radius: 7px; font-size: 12px; font-weight: 650;
  color: color-mix(in srgb, var(--cat-color, var(--accent)) 82%, var(--text));
  background: color-mix(in srgb, var(--cat-color, var(--accent)) 12%, var(--card));
  border: 1px solid color-mix(in srgb, var(--cat-color, var(--accent)) 22%, transparent);
}
.page-hero h1 {
  margin: 12px 0 0; font-size: clamp(23px, 2.8vw, 33px); line-height: 1.32;
  letter-spacing: -.022em; font-weight: 790;
}
.page-hero p { margin: 10px 0 0; font-size: 14.8px; line-height: 1.8; color: var(--text-2); max-width: 680px; }
.page-hero-meta { display: flex; flex-wrap: wrap; gap: 18px; margin-top: 14px; font-size: 12.5px; color: var(--muted); }
.page-hero-meta b { color: var(--text); font-weight: 700; font-variant-numeric: tabular-nums; }

.lib-section { padding-top: 6px; }

.cat-switch { margin: 30px 0 10px; padding-top: 22px; border-top: 1px solid var(--line); }
.cat-switch h2 { margin: 0 0 12px; font-size: 15px; font-weight: 680; }
.cat-switch-list { display: flex; flex-wrap: wrap; gap: 8px; }
.cat-switch-list a {
  padding: 8px 14px; border-radius: 999px; font-size: 13px;
  background: var(--card); border: 1px solid var(--line); color: var(--text-2);
  transition: border-color .18s, color .18s;
}
.cat-switch-list a:hover { border-color: color-mix(in srgb, var(--cat-color, var(--accent)) 45%, var(--line)); color: var(--text); }

.hub-block { margin-bottom: 30px; }
.hub-head { display: flex; align-items: baseline; gap: 10px; margin-bottom: 10px; padding-bottom: 8px; border-bottom: 1px solid var(--line); }
.hub-head h2 { margin: 0; font-size: 17px; font-weight: 720; letter-spacing: -.01em; }
.hub-head h2 a:hover { color: var(--accent); }
.hub-head span { font-size: 12px; color: var(--muted); background: var(--bg-soft); padding: 1px 8px; border-radius: 999px; }
.hub-list { list-style: none; margin: 0; padding: 0; display: grid; gap: 2px; grid-template-columns: repeat(auto-fill, minmax(300px, 1fr)); }
.hub-list a { display: block; padding: 8px 10px; border-radius: 9px; transition: background .16s; }
.hub-list a:hover { background: var(--card); box-shadow: var(--shadow-sm); }
.hub-title { display: block; font-size: 13.5px; font-weight: 560; line-height: 1.55; color: var(--text); }
.hub-meta { display: block; font-size: 11px; color: var(--muted); margin-top: 2px; }

/* ---------- 关于 / 文档 ---------- */
.doc { max-width: 780px; margin: 0 auto; padding: 34px 0 60px; }
.doc h1 { font-size: clamp(26px, 3.4vw, 36px); letter-spacing: -.025em; margin: 0 0 10px; }
.doc h2 { font-size: 19px; margin: 34px 0 10px; letter-spacing: -.01em; }
.doc h3 { font-size: 15.5px; margin: 22px 0 6px; }
.doc p, .doc li { color: var(--text-2); font-size: 14.6px; line-height: 1.85; }
.doc ul { padding-left: 20px; }
.doc li { margin: 6px 0; }
.doc .lead { font-size: 16px; color: var(--text); }
.doc code {
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
  font-size: .9em; background: var(--bg-soft); padding: 2px 6px; border-radius: 5px;
}
.note {
  margin: 20px 0; padding: 14px 16px; border-radius: 12px;
  background: var(--accent-soft); border: 1px solid color-mix(in srgb, var(--accent) 20%, transparent);
  font-size: 13.5px; line-height: 1.75; color: var(--text-2);
}

/* ---------- toast ---------- */
.toast {
  position: fixed; left: 50%; bottom: 26px; transform: translate(-50%, 20px);
  background: #0e1729; color: #fff; font-size: 13px; font-weight: 550;
  padding: 10px 16px; border-radius: 11px; z-index: 200;
  opacity: 0; pointer-events: none; transition: all .25s var(--ease);
  box-shadow: var(--shadow-lg);
}
.toast.show { opacity: 1; transform: translate(-50%, 0); }

/* ---------- Responsive ---------- */
@media (max-width: 1080px) {
  .hero-grid { grid-template-columns: minmax(0, 1fr); gap: 26px; }
  .hero-panel { max-width: 560px; }
  .stats { grid-template-columns: repeat(4, minmax(0, 1fr)); }
  .stat b { font-size: 18px; }
  .detail-grid { grid-template-columns: minmax(0, 1fr) 288px; gap: 28px; }
}

@media (max-width: 900px) {
  .grid { grid-template-columns: 1fr; }
  .detail-grid { grid-template-columns: minmax(0, 1fr); gap: 26px; }
  .detail-main { max-width: none; }
  .detail-side { position: static; grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); }
}

@media (max-width: 720px) {
  :root { --header-h: 58px; --gutter: 14px; }
  .nav { gap: 0; }
  .nav a { display: none; }
  .nav a.nav-about { display: inline-flex; padding: 6px 8px; font-size: 13px; }
  .brand-sub { display: none; }
  .lang-btn { padding: 6px 9px; font-size: 12px; }
  .header .wrap { gap: 8px; }
  .brand-name { font-size: 14.5px; }
  .hero { padding: 26px 0 22px; }
  .hero::before, .hero::after { filter: blur(56px); opacity: .34; }
  h1.hero-title { font-size: clamp(26px, 8vw, 34px); }
  .search-shell { flex-direction: column; }
  .search-box { height: 46px; }
  .btn { height: 46px; }
  .search-shell .btn { width: 100%; }
  .stats { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .hero-panel { padding: 12px; border-radius: 16px; }
  .stat { padding: 9px 10px; border-radius: 11px; }
  .stat b { font-size: 17px; }
  .stat span { font-size: 10.8px; }
  .panel-note { display: none; }
  .panel-head { padding-bottom: 9px; margin-bottom: 9px; }
  .cat-wrap { padding: 8px var(--gutter); }
    .toolbar { padding: 14px 0 2px; gap: 8px; }
  .result-line { width: 100%; }
  .grid { padding: 8px 0; gap: 12px; }
  .card { border-radius: 16px; padding: 14px 14px 12px; }
  .section { padding: 34px 0; }
  .footer .wrap { gap: 20px; }
  .footer-col, .footer-col-wide { flex: 1 1 130px; }
  .d-h1 { font-size: 24px; }
  .article-block { margin-top: 28px; }
  .article-block h2 { font-size: 17.5px; }
  .quote-card { padding: 14px; }
  .quote-card .q-en { font-size: 14px; }
  .summary { padding: 14px; }
  .demand-bars i { width: 20px; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation-duration: .001ms !important; transition-duration: .001ms !important; }
  .card { opacity: 1; transform: none; }
}

/* ---------- DemandHunt 新增：机会分 / 筛选面板 / 聚类 / 语言链接 ---------- */
.score {
  display: inline-flex; align-items: center; gap: 3px;
  font-size: 12px; font-weight: 750; letter-spacing: 0;
  padding: 2px 8px; border-radius: 999px;
  color: #9a3412; background: color-mix(in srgb, #f97316 12%, var(--card));
  border: 1px solid color-mix(in srgb, #f97316 22%, transparent);
  white-space: nowrap;
}
.score .icon { width: 12px; height: 12px; }
.score.mid { color: #1d4ed8; background: color-mix(in srgb, #3b82f6 10%, var(--card)); border-color: color-mix(in srgb, #3b82f6 20%, transparent); }
.score.hi { color: #166534; background: color-mix(in srgb, #10b981 12%, var(--card)); border-color: color-mix(in srgb, #10b981 22%, transparent); }
.score.big { font-size: 13px; padding: 4px 11px; margin-left: auto; }
.score-inline { font-weight: 800; color: var(--accent); }
.new-badge {
  font-size: 10px; font-weight: 800; letter-spacing: .06em;
  padding: 2px 6px; border-radius: 6px;
  color: #fff; background: linear-gradient(135deg, #f43f5e, #f97316);
  white-space: nowrap;
}
.card-top { display: flex; align-items: center; gap: 6px; }
.card-top .platform { flex: 1 1 auto; min-width: 0; }

.filters {
  display: flex; align-items: end; gap: 10px; flex-wrap: wrap;
  padding: 12px 14px; margin-bottom: 18px;
  background: var(--card); border: 1px solid var(--line);
  border-radius: 14px;
}
.filter { display: flex; flex-direction: column; gap: 4px; }
.filter > span { font-size: 11px; font-weight: 650; color: var(--muted); letter-spacing: .02em; }
.filter select {
  appearance: none; -webkit-appearance: none;
  border: 1px solid var(--line); background: var(--bg); color: var(--text);
  font: inherit; font-size: 13px; font-weight: 600;
  padding: 7px 30px 7px 11px; border-radius: 9px; cursor: pointer;
  background-image: url("data:image/svg+xml;charset=utf8,%3Csvg xmlns='http://www.w3.org/2000/svg' width='10' height='6' viewBox='0 0 10 6'%3E%3Cpath d='M1 1l4 4 4-4' stroke='%23888' stroke-width='1.6' fill='none' stroke-linecap='round'/%3E%3C/svg%3E");
  background-repeat: no-repeat; background-position: right 10px center;
}
.filter select:focus { outline: 2px solid color-mix(in srgb, var(--accent) 35%, transparent); outline-offset: 1px; }
.filter-reset {
  border: 1px dashed var(--line); background: transparent; color: var(--muted);
  font: inherit; font-size: 12.5px; font-weight: 600;
  padding: 8px 13px; border-radius: 9px; cursor: pointer; transition: all .16s;
}
.filter-reset:hover { color: var(--text); border-color: var(--muted); }

.cluster-row { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 14px; }
.cluster-chip {
  display: inline-flex; align-items: center; gap: 6px;
  font-size: 12.5px; font-weight: 650; text-decoration: none;
  color: var(--text); background: var(--card);
  border: 1px solid var(--line); border-radius: 999px; padding: 5px 11px;
  transition: all .16s;
}
.cluster-chip:hover { border-color: var(--accent); color: var(--accent); }
.cluster-chip span {
  font-size: 11px; font-weight: 700; color: var(--muted);
  background: var(--bg); border-radius: 999px; padding: 1px 7px;
}

.pay-chip {
  display: inline-flex; align-items: center; gap: 6px;
  font-size: 12.5px; font-weight: 700;
  padding: 5px 12px; border-radius: 999px;
}
.pay-chip .icon { width: 13px; height: 13px; }
.pay-chip.pay-0 { color: var(--muted); border: 1px dashed var(--line); }
.pay-chip.pay-1 { color: #1d4ed8; background: color-mix(in srgb, #3b82f6 10%, transparent); }
.pay-chip.pay-2 { color: #166534; background: color-mix(in srgb, #10b981 12%, transparent); }
.demand-side { display: flex; align-items: center; gap: 14px; flex-wrap: wrap; flex: 1 1 260px; }
.demand-side .demand-note { margin: 0; font-size: 12.5px; color: var(--muted); max-width: 420px; }
.cluster-link a { font-weight: 700; color: var(--accent); text-decoration: none; }
.side-list b { display: block; }

@media (max-width: 640px) {
  .filters { gap: 8px; padding: 10px 12px; }
  .filter { flex: 1 1 44%; }
  .filter select { width: 100%; }
  .score.big { margin-left: 0; }
}

/* ---------- 移动端头部 ---------- */
@media (max-width: 620px) {
  .header .wrap { gap: 6px; }
  .brand-sub { display: none; }
  .brand-name { font-size: 14px; }
  .lang-btn { padding: 6px 9px; font-size: 12.5px; }
  .nav a.nav-about { padding: 5px 4px; font-size: 12px; }
  .icon-btn { width: 32px; height: 32px; }
}
@media (max-width: 380px) {
  .lang-btn { padding: 5px 7px; font-size: 12px; }
}

/* ---------- 隐私政策 / 联系我们 ---------- */
.contact-mail { margin: 8px 0 0; }
.contact-mail a {
  display: inline-block; padding: 10px 16px; border-radius: 10px;
  background: color-mix(in srgb, var(--accent) 10%, var(--card));
  border: 1px solid color-mix(in srgb, var(--accent) 30%, var(--line));
  color: var(--accent); font-weight: 700; font-size: 16px;
  text-decoration: none; letter-spacing: .01em;
}
.contact-mail a:hover { border-color: var(--accent); }
.legal-cross { margin-top: 30px; padding-top: 18px; border-top: 1px dashed var(--line); color: var(--muted); }
.legal-cross a { color: var(--accent); text-decoration: none; }
.legal-cross a:hover { text-decoration: underline; }