/* ICNAV · 深色工业设计系统
   来源：Stitch 项目 Semiconductor Directory & Hub 设计 token */

:root {
  /* 表面 */
  --bg: #0d1322;
  --bg-deep: #080e1d;
  --surface-low: #151b2b;
  --surface: #191f2f;
  --surface-high: #242a3a;
  --surface-highest: #2f3445;
  --surface-bright: #33394a;

  /* 描边 */
  --line: #2f3445;
  --line-soft: #3b494b;

  /* 文本 */
  --text: #dde2f8;
  --text-2: #b9cacb;
  --text-3: #849495;

  /* 强调 */
  --accent: #00f0ff;
  --accent-dim: #00dbe9;
  --accent-soft: #7df4ff;
  --accent-ink: #00363a;
  --accent-10: rgba(0, 240, 255, 0.1);
  --accent-20: rgba(0, 240, 255, 0.2);
  --accent-glow: rgba(0, 240, 255, 0.28);

  /* 语义色 */
  --ok: #00e599;
  --warn: #ffb800;
  --danger: #ff3b30;
  --danger-soft: #ffb4ab;
  --info: #adc6ff;
  --purple: #e1d2ff;

  /* 圆角 */
  --r-sm: 2px;
  --r: 4px;
  --r-lg: 8px;
  --r-xl: 12px;

  /* 字体 */
  --font-body: Inter, -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
    "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  --font-display: "Space Grotesk", Inter, -apple-system, "PingFang SC", "Microsoft YaHei", sans-serif;
  --font-mono: "JetBrains Mono", ui-monospace, SFMono-Regular, Consolas, "Liberation Mono", monospace;
}

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

html,
body {
  margin: 0;
  padding: 0;
}

body {
  background: var(--bg);
  color: var(--text);
  font: 400 14px/20px var(--font-body);
  -webkit-font-smoothing: antialiased;
  overscroll-behavior-y: none;
}

a {
  color: inherit;
  text-decoration: none;
}

button {
  font: inherit;
  color: inherit;
  background: none;
  border: none;
  cursor: pointer;
}

input,
select,
textarea {
  font: inherit;
  color: inherit;
}

::selection {
  background: var(--accent);
  color: var(--accent-ink);
}

::-webkit-scrollbar {
  width: 10px;
  height: 10px;
}

::-webkit-scrollbar-thumb {
  background: var(--surface-highest);
  border-radius: 999px;
  border: 3px solid var(--bg);
}

::-webkit-scrollbar-track {
  background: transparent;
}

/* 微型大写标签 */
.label {
  font: 500 10px/14px var(--font-mono);
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--text-3);
}

/* ---------- 顶部 ---------- */
.app-header {
  position: sticky;
  top: 0;
  z-index: 30;
  display: flex;
  align-items: center;
  gap: 20px;
  height: 56px;
  padding: 0 20px;
  background: rgba(13, 19, 34, 0.92);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--line);
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
}

.brand-mark {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 28px;
  height: 28px;
  border-radius: var(--r);
  background: var(--accent);
  color: var(--accent-ink);
  box-shadow: 0 0 12px var(--accent-glow);
}

.brand-text {
  display: flex;
  flex-direction: column;
  line-height: 1.1;
}

.brand-name {
  font: 700 15px/18px var(--font-display);
  letter-spacing: 0.04em;
  color: var(--accent-soft);
}

.brand-sub {
  font: 500 9px/12px var(--font-mono);
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--text-3);
}

/* ---------- 首屏搜索 ---------- */
.hero {
  padding: 28px 0 22px;
}

.hero-tabs {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 30px;
  margin-bottom: 18px;
}

.hero-tab {
  position: relative;
  padding: 4px 2px;
  font-size: 13px;
  color: #8a93a6;
  transition: color 0.15s;
}

.hero-tab:hover {
  color: var(--text);
}

.hero-tab.is-active {
  color: #fff;
  font-weight: 600;
}

.hero-tab.is-active::after {
  content: "";
  position: absolute;
  left: 50%;
  bottom: -4px;
  width: 22px;
  height: 2px;
  margin-left: -11px;
  border-radius: 2px;
  background: #fff;
}

.hero-search {
  display: flex;
  max-width: 720px;
  height: 48px;
  margin: 0 auto;
  overflow: hidden;
  border-radius: 6px;
  background: #fff;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.35);
}

.hero-search input {
  flex: 1;
  min-width: 0;
  padding: 0 18px;
  border: none;
  outline: none;
  background: #fff;
  color: #1b1b1d;
  font-size: 14px;
}

.hero-search input::placeholder {
  color: #9aa0ad;
}

.hero-go {
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  width: 66px;
  background: #f2696c;
  color: #fff;
  transition: background-color 0.15s;
}

.hero-go:hover {
  background: #e5565a;
}

.hot-panel {
  max-width: 920px;
  margin: 22px auto 0;
  padding: 14px 18px 16px;
  background: #141a29;
  border: 1px solid var(--line);
  border-radius: 8px;
}

.hot-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--line);
}

.hot-title {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 13px;
  color: var(--text);
}

.hot-title svg {
  color: #f2696c;
}

.hot-cta {
  padding: 4px 10px;
  border: 1px solid var(--line-soft);
  border-radius: 4px;
  font-size: 11px;
  color: var(--text-2);
  transition: color 0.15s, border-color 0.15s;
}

.hot-cta:hover {
  color: var(--accent);
  border-color: var(--accent);
}

.hot-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 12px 18px;
  padding-top: 14px;
}

.hot-item {
  display: flex;
  align-items: center;
  gap: 8px;
  min-width: 0;
  cursor: pointer;
}

.hot-avatar {
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  width: 22px;
  height: 22px;
  overflow: hidden;
  border-radius: 50%;
  background: var(--surface-high);
  font: 500 9px var(--font-mono);
  color: var(--text-2);
}

.hot-avatar img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.hot-name {
  overflow: hidden;
  font-size: 12px;
  color: var(--text-2);
  text-overflow: ellipsis;
  white-space: nowrap;
}

.hot-item:hover .hot-name {
  color: #fff;
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-left: auto;
  flex-shrink: 0;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  height: 32px;
  padding: 0 12px;
  border: 1px solid var(--line-soft);
  border-radius: var(--r);
  background: var(--surface-low);
  color: var(--text);
  font: 500 11px/1 var(--font-mono);
  letter-spacing: 0.04em;
  text-transform: uppercase;
  white-space: nowrap;
  transition: background-color 0.15s, border-color 0.15s, color 0.15s;
}

.btn:hover {
  background: var(--surface-high);
  border-color: var(--text-3);
}

.btn-primary {
  background: var(--accent);
  border-color: var(--accent);
  color: var(--accent-ink);
  font-weight: 600;
  box-shadow: 0 0 16px var(--accent-glow);
}

.btn-primary:hover {
  background: var(--accent-soft);
  border-color: var(--accent-soft);
}

.btn.is-on {
  background: var(--accent-10);
  border-color: var(--accent);
  color: var(--accent);
}

.btn-count {
  font: 10px var(--font-mono);
  color: var(--text-3);
}

.btn.is-on .btn-count {
  color: var(--accent);
}

/* ---------- 移动端 chips ---------- */
.chips {
  display: none;
  gap: 6px;
  padding: 8px 16px;
  overflow-x: auto;
  background: var(--bg);
  border-bottom: 1px solid var(--line);
  scrollbar-width: none;
}

.chips::-webkit-scrollbar {
  display: none;
}

.chip {
  flex-shrink: 0;
  height: 26px;
  padding: 0 10px;
  border: 1px solid var(--line-soft);
  border-radius: 999px;
  font: 500 11px/1 var(--font-mono);
  letter-spacing: 0.03em;
  color: var(--text-2);
  background: var(--surface-low);
}

.chip.is-active {
  background: var(--accent);
  border-color: var(--accent);
  color: var(--accent-ink);
  font-weight: 600;
}

/* ---------- 布局 ---------- */
.layout {
  display: grid;
  grid-template-columns: 224px minmax(0, 1fr);
  align-items: start;
  max-width: 1480px;
  margin: 0 auto;
}

.sidebar {
  position: sticky;
  top: 56px;
  max-height: calc(100vh - 56px);
  overflow-y: auto;
  padding: 12px 10px 32px;
  background: var(--bg-deep);
  border-right: 1px solid var(--line);
  min-height: calc(100vh - 56px);
}

.sidebar-group + .sidebar-group {
  margin-top: 18px;
}

.sidebar-group-title {
  margin-bottom: 4px;
  padding: 0 8px;
  font: 500 9px/14px var(--font-mono);
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--text-3);
}

.sidebar-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  height: 30px;
  padding: 0 8px;
  border-radius: var(--r);
  font-size: 13px;
  color: var(--text-2);
  text-align: left;
  transition: background-color 0.12s, color 0.12s;
}

.sidebar-item:hover {
  background: var(--surface);
  color: var(--text);
}

.sidebar-item.is-active {
  background: var(--accent);
  color: var(--accent-ink);
  font-weight: 600;
  box-shadow: 0 0 14px var(--accent-glow);
}

.sidebar-item span {
  font: 10px var(--font-mono);
  color: var(--text-3);
}

.sidebar-item.is-active span {
  color: var(--accent-ink);
  opacity: 0.75;
}

/* ---------- 内容区 ---------- */
.content {
  min-height: calc(100vh - 56px);
  padding: 16px 20px 56px;
}

.toolbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  min-height: 28px;
  margin-bottom: 14px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--line);
}

.toolbar-title {
  display: flex;
  align-items: baseline;
  gap: 8px;
}

.toolbar-title strong {
  font: 600 18px/26px var(--font-display);
  letter-spacing: -0.01em;
  color: var(--text);
}

.toolbar-title span {
  font: 500 10px/14px var(--font-mono);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text-3);
}

.toolbar-meta {
  font: 500 10px/14px var(--font-mono);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--accent);
}

.category-block + .category-block {
  margin-top: 26px;
}

.category-head {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 10px;
}

.category-head h2 {
  margin: 0;
  font: 600 13px/18px var(--font-body);
  color: var(--text);
}

.category-head .cat-count {
  display: inline-flex;
  align-items: center;
  height: 16px;
  padding: 0 6px;
  border: 1px solid var(--line-soft);
  border-radius: var(--r-sm);
  font: 10px/1 var(--font-mono);
  color: var(--text-3);
}

.category-head .cat-group {
  margin-left: auto;
  font: 500 9px/14px var(--font-mono);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text-3);
}

.grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(252px, 1fr));
  gap: 10px;
}

/* ---------- 卡片 ---------- */
.card {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 12px;
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  background: var(--surface-low);
  transition: border-color 0.15s, background-color 0.15s, transform 0.15s;
}

.card:hover {
  background: var(--surface);
  border-color: var(--line-soft);
}

.card:hover .card-logo {
  border-color: var(--accent);
  color: var(--accent);
}

.card-top {
  display: flex;
  align-items: center;
  gap: 8px;
}

.card-logo {
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  width: 26px;
  height: 26px;
  overflow: hidden;
  border: 1px solid var(--line-soft);
  border-radius: var(--r);
  background: var(--bg-deep);
  font: 500 10px var(--font-mono);
  color: var(--text-2);
  transition: border-color 0.15s, color 0.15s;
}

.card-logo img {
  width: 100%;
  height: 100%;
  object-fit: contain;
}

.card-name {
  flex: 1;
  min-width: 0;
  overflow: hidden;
  font: 600 13px/18px var(--font-body);
  color: var(--text);
  text-overflow: ellipsis;
  white-space: nowrap;
}

.card-name a:hover {
  color: var(--accent);
}

.fav {
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  width: 22px;
  height: 22px;
  border-radius: var(--r-sm);
  color: var(--text-3);
  transition: color 0.12s, background-color 0.12s;
}

.fav:hover {
  background: var(--surface-high);
  color: var(--text-2);
}

.fav.is-on {
  color: var(--accent);
  filter: drop-shadow(0 0 6px var(--accent-glow));
}

.card-host {
  font: 400 10px/14px var(--font-mono);
  letter-spacing: 0.02em;
  color: var(--text-3);
}

.card-desc {
  display: -webkit-box;
  overflow: hidden;
  font-size: 12px;
  line-height: 1.55;
  color: var(--text-2);
  -webkit-box-orient: vertical;
  -webkit-line-clamp: 2;
}

.card-desc mark,
.card-name mark {
  padding: 0 2px;
  border-radius: var(--r-sm);
  background: var(--accent-20);
  color: var(--accent-soft);
}

.card-foot {
  display: flex;
  align-items: center;
  gap: 6px;
  margin-top: 2px;
  padding-top: 8px;
  border-top: 1px solid var(--line);
  font: 400 10px/14px var(--font-mono);
  color: var(--text-3);
}

/* ---------- 空状态 ---------- */
.empty {
  padding: 64px 16px;
  border: 1px dashed var(--line-soft);
  border-radius: var(--r-lg);
  font-size: 13px;
  color: var(--text-3);
  text-align: center;
}

.empty strong {
  display: block;
  margin-bottom: 6px;
  font: 600 14px var(--font-display);
  color: var(--text-2);
}

/* ---------- 详情抽屉 ---------- */
.drawer-mask {
  position: fixed;
  inset: 0;
  z-index: 40;
  background: rgba(4, 8, 16, 0.6);
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.18s;
}

.drawer-mask.is-open {
  opacity: 1;
  pointer-events: auto;
}

.drawer {
  position: fixed;
  top: 0;
  right: 0;
  z-index: 41;
  display: flex;
  flex-direction: column;
  width: 420px;
  max-width: 92vw;
  height: 100%;
  background: var(--surface-low);
  border-left: 1px solid var(--line-soft);
  transform: translateX(100%);
  transition: transform 0.22s ease;
}

.drawer.is-open {
  transform: translateX(0);
}

.drawer-head {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 16px;
  border-bottom: 1px solid var(--line);
}

.drawer-body {
  flex: 1;
  overflow-y: auto;
  padding: 16px;
}

.drawer-close {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 26px;
  height: 26px;
  margin-left: auto;
  border: 1px solid var(--line-soft);
  border-radius: var(--r);
  color: var(--text-2);
}

.drawer-close:hover {
  background: var(--surface-high);
  color: var(--text);
}

.drawer-title {
  font: 600 16px/22px var(--font-display);
}

.drawer-sub {
  font: 400 11px/16px var(--font-mono);
  color: var(--text-3);
}

.kv {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px;
  padding: 10px 0;
  border-bottom: 1px solid var(--line);
}

.kv dt {
  font: 500 10px/14px var(--font-mono);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text-3);
}

.kv dd {
  margin: 0;
  font-size: 12px;
  color: var(--text);
  text-align: right;
  word-break: break-all;
}

.drawer-actions {
  display: flex;
  gap: 8px;
  padding: 16px;
  border-top: 1px solid var(--line);
}

/* ---------- 页脚 ---------- */
.site-footer {
  padding: 20px;
  border-top: 1px solid var(--line);
  font: 400 10px/16px var(--font-mono);
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--text-3);
  text-align: center;
}

.site-footer a {
  color: var(--text-2);
}

.site-footer a:hover {
  color: var(--accent);
}

/* ---------- 提交页 ---------- */
.submit-wrap {
  max-width: 560px;
  margin: 0 auto;
  padding: 32px 20px 64px;
}

.submit-head .label {
  display: block;
  margin-bottom: 8px;
  color: var(--accent);
}

.submit-head h1 {
  margin: 0 0 8px;
  font: 600 24px/32px var(--font-display);
  letter-spacing: -0.02em;
}

.submit-head p {
  margin: 0 0 24px;
  font-size: 13px;
  color: var(--text-2);
}

.field {
  margin-bottom: 16px;
}

.field label {
  display: flex;
  align-items: center;
  gap: 6px;
  margin-bottom: 6px;
  font: 500 10px/14px var(--font-mono);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text-3);
}

.field label.required::before {
  content: "";
  width: 4px;
  height: 4px;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 6px var(--accent-glow);
}

.field input[type="text"],
.field input[type="url"],
.field select,
.field textarea {
  width: 100%;
  height: 34px;
  padding: 0 10px;
  border: 1px solid var(--line-soft);
  border-radius: var(--r);
  background: var(--bg-deep);
  color: var(--text);
  font-size: 13px;
  outline: none;
  transition: border-color 0.15s, box-shadow 0.15s;
}

.field textarea {
  height: 76px;
  padding: 8px 10px;
  line-height: 1.5;
  resize: vertical;
}

.field input:focus,
.field select:focus,
.field textarea:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-10);
}

.field-hint {
  margin-top: 5px;
  font: 400 10px/14px var(--font-mono);
  color: var(--text-3);
}

.upload-box {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px;
  border: 1px dashed var(--line-soft);
  border-radius: var(--r);
  background: var(--bg-deep);
}

.upload-preview {
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  width: 40px;
  height: 40px;
  overflow: hidden;
  border: 1px solid var(--line-soft);
  border-radius: var(--r);
  background: var(--surface-low);
  font: 11px var(--font-mono);
  color: var(--text-3);
}

.upload-preview img {
  width: 100%;
  height: 100%;
  object-fit: contain;
}

.upload-meta {
  flex: 1;
  font-size: 12px;
  color: var(--text-2);
}

.upload-meta span {
  display: block;
  margin-top: 2px;
  font: 400 10px var(--font-mono);
  color: var(--text-3);
}

.upload-trigger {
  margin: 0;
  cursor: pointer;
  color: var(--accent);
  font: 500 11px var(--font-mono);
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.form-actions {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-top: 24px;
}

.form-msg {
  font: 400 11px/16px var(--font-mono);
}

.form-msg.is-error {
  color: var(--danger-soft);
}

.form-msg.is-ok {
  color: var(--ok);
}

/* ---------- 响应式 ---------- */
@media (max-width: 900px) {
  .app-header {
    gap: 10px;
    padding: 0 14px;
  }

  .brand-sub {
    display: none;
  }

  .hero {
    padding: 16px 0 14px;
  }

  .hero-tabs {
    gap: 18px;
    justify-content: flex-start;
    overflow-x: auto;
    padding-bottom: 4px;
    scrollbar-width: none;
  }

  .hero-tabs::-webkit-scrollbar {
    display: none;
  }

  .hero-tab {
    flex-shrink: 0;
  }

  .hero-search {
    height: 44px;
  }

  .hot-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .layout {
    grid-template-columns: minmax(0, 1fr);
  }

  .sidebar {
    display: none;
  }

  .chips {
    display: flex;
  }

  .content {
    padding: 12px 14px 40px;
  }

  .grid {
    grid-template-columns: minmax(0, 1fr);
  }

  .toolbar-title strong {
    font-size: 16px;
  }
}

@media (max-width: 560px) {
  .header-actions .btn-label {
    display: none;
  }

  .header-actions .btn {
    padding: 0 10px;
  }
}