/* ============================================================
   码途导航 · 次级页面样式 (pages.css)
   只服务 start.html / submit.html / 404.html
   复用 base.css 的设计变量与 .btn/.chip/.tag/.toast 等原语
   ============================================================ */

/* ---------- 0. 共享：页面外壳 ---------- */
[hidden] {
  display: none !important;
}

.pg {
  --pg-grid: rgba(15, 23, 42, 0.05);
}

[data-theme="dark"] .pg {
  --pg-grid: rgba(148, 163, 184, 0.08);
}

/* 背景：柔和渐变光斑 + 极淡网格纹理（纯 CSS，无图片） */
.pg-bg {
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  background-color: var(--bg);
  overflow: hidden;
}
.pg-bg::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image: var(--grad-hero);
}
.pg-bg::after {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(to right, var(--pg-grid) 1px, transparent 1px),
    linear-gradient(to bottom, var(--pg-grid) 1px, transparent 1px);
  background-size: 46px 46px;
  -webkit-mask-image: radial-gradient(ellipse 92% 78% at 50% 30%, #000 10%, transparent 88%);
  mask-image: radial-gradient(ellipse 92% 78% at 50% 30%, #000 10%, transparent 88%);
}

.pg-body {
  display: flex;
  flex-direction: column;
  min-height: 100vh;
  min-height: 100dvh;
}

/* 顶部条 */
.pg-top {
  position: relative;
  z-index: 3;
  flex: 0 0 auto;
}
.pg-top-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  height: var(--header-h);
  max-width: 1120px;
  margin-inline: auto;
  padding-inline: var(--gutter);
}
.pg-top-left,
.pg-top-right {
  display: flex;
  align-items: center;
  gap: 8px;
  min-width: 0;
}
.pg-top-right {
  justify-content: flex-end;
}
.pg-top-sep {
  width: 1px;
  height: 16px;
  flex: none;
  background: var(--border-strong);
}

/* 品牌标识 */
.pg-brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  min-width: 0;
  color: var(--text);
  font-weight: 700;
  letter-spacing: -0.01em;
}
.pg-brand-mark {
  width: 30px;
  height: 30px;
  flex: none;
  filter: drop-shadow(0 5px 12px rgba(79, 70, 229, 0.32));
  transition: transform 0.25s var(--ease);
}
.pg-brand:hover .pg-brand-mark {
  transform: rotate(-6deg) scale(1.04);
}
.pg-brand-name {
  font-size: 16px;
  white-space: nowrap;
}
.pg-brand-sub {
  font-size: 10.5px;
  font-weight: 600;
  letter-spacing: 0.14em;
  color: var(--text-3);
  text-transform: uppercase;
  white-space: nowrap;
}

/* 文字链接 */
.pg-top-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  height: 34px;
  padding: 0 10px;
  border-radius: var(--r-xs);
  color: var(--text-2);
  font-size: 13.5px;
  font-weight: 500;
  white-space: nowrap;
  transition: background-color 0.18s, color 0.18s;
}
.pg-top-link:hover {
  background: var(--surface-3);
  color: var(--text);
}
.pg-top-link svg {
  width: 15px;
  height: 15px;
  flex: none;
}

/* 主题切换图标：浅色显示月亮，深色显示太阳 */
[data-theme-toggle] .icon-sun {
  display: none;
}
[data-theme-toggle] .icon-moon {
  display: block;
}
[data-theme="dark"] [data-theme-toggle] .icon-sun {
  display: block;
}
[data-theme="dark"] [data-theme-toggle] .icon-moon {
  display: none;
}

/* 极简页脚 */
.pg-footer {
  position: relative;
  z-index: 1;
  flex: 0 0 auto;
  padding: 4px var(--gutter) 22px;
}
.pg-footer-inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 8px 18px;
  max-width: 1120px;
  margin-inline: auto;
  color: var(--text-3);
  font-size: 12.5px;
}
.pg-footer-links {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 16px;
}
.pg-footer a {
  color: var(--text-2);
  transition: color 0.18s;
}
.pg-footer a:hover {
  color: var(--primary);
}

.pg-noscript {
  max-width: 760px;
  margin: 0 auto;
  padding: 12px 16px;
  border-radius: var(--r-md);
  border: 1px solid var(--border);
  background: var(--warn-soft);
  color: var(--text);
  font-size: 13px;
  text-align: center;
}

/* ============================================================
   1. 起始页 start.html
   ============================================================ */
.st-main {
  position: relative;
  z-index: 1;
  flex: 1 0 auto;
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: clamp(24px, 3.4vh, 36px);
  width: 100%;
  max-width: 1120px;
  margin-inline: auto;
  padding: clamp(16px, 3.4vh, 34px) var(--gutter) clamp(10px, 2vh, 22px);
}

/* --- 时钟与问候 --- */
.st-clock-region {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 12px;
  text-align: center;
  animation: float-in 0.6s var(--ease) both;
}
.st-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 5px 13px 5px 10px;
  border-radius: var(--r-full);
  border: 1px solid var(--border);
  background: var(--surface);
  box-shadow: var(--shadow-xs);
  color: var(--text-2);
  font-size: 12px;
  font-weight: 500;
  line-height: 1.5;
}
.st-eyebrow b {
  color: var(--text);
  font-weight: 700;
  letter-spacing: 0.04em;
}
.st-eyebrow-dot {
  width: 6px;
  height: 6px;
  flex: none;
  border-radius: 50%;
  background: var(--primary);
  box-shadow: 0 0 0 3px var(--primary-soft);
  animation: pulse-dot 2.6s var(--ease) infinite;
}

.st-clock {
  display: flex;
  align-items: baseline;
  justify-content: center;
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-feature-settings: "tnum" 1;
  font-weight: 700;
  font-size: clamp(48px, 8vw, 96px);
  line-height: 1;
  letter-spacing: -0.045em;
  color: var(--text);
}
.st-clock .st-colon {
  margin: 0 clamp(2px, 0.5vw, 8px);
  color: var(--primary);
  transform: translateY(-0.05em);
  animation: st-blink 2s var(--ease) infinite;
}
@keyframes st-blink {
  0%,
  45% {
    opacity: 1;
  }
  55%,
  100% {
    opacity: 0.22;
  }
}

.st-daterow {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  gap: 4px 12px;
  font-size: 14.5px;
  line-height: 1.6;
}
.st-date {
  color: var(--text-2);
  font-weight: 500;
}
.st-dot {
  width: 4px;
  height: 4px;
  flex: none;
  border-radius: 50%;
  background: var(--text-3);
}
.st-greet {
  color: var(--text-2);
}

/* --- 搜索区 --- */
.st-search {
  display: flex;
  flex-direction: column;
  gap: 13px;
  width: 100%;
  max-width: 740px;
  margin-inline: auto;
  animation: float-in 0.6s var(--ease) 0.06s both;
}
.st-search-box {
  display: flex;
  align-items: center;
  gap: 10px;
  width: 100%;
  height: 64px;
  padding: 8px 8px 8px 22px;
  border-radius: 22px;
  border: 1px solid var(--border);
  background: var(--surface);
  box-shadow: var(--shadow-md);
  transition: border-color 0.2s, box-shadow 0.2s;
}
.st-search-box:focus-within {
  border-color: var(--primary);
  box-shadow: 0 0 0 4px var(--primary-soft), var(--shadow-md);
}
.st-search-ico {
  width: 21px;
  height: 21px;
  flex: none;
  color: var(--text-3);
  transition: color 0.2s;
}
.st-search-box:focus-within .st-search-ico {
  color: var(--primary);
}
.st-search-input {
  flex: 1 1 auto;
  min-width: 0;
  height: 100%;
  border: 0;
  background: transparent;
  color: var(--text);
  font-size: 17px;
}
.st-search-input:focus,
.st-search-input:focus-visible {
  outline: none;
}
.st-search-input::placeholder {
  color: var(--text-3);
}
.st-search-input::-webkit-search-cancel-button {
  -webkit-appearance: none;
  appearance: none;
}
.st-search-btn {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  flex: none;
  height: 48px;
  padding: 0 22px;
  border-radius: 16px;
  background-image: linear-gradient(135deg, var(--primary) 0%, var(--primary-2) 100%);
  color: #fff;
  font-size: 14.5px;
  font-weight: 600;
  box-shadow: var(--shadow-brand);
  transition: transform 0.18s var(--ease), filter 0.18s;
}
.st-search-btn:hover {
  transform: translateY(-1px);
  filter: brightness(1.06);
}
.st-search-btn:active {
  transform: translateY(0);
}
.st-search-btn svg {
  width: 17px;
  height: 17px;
}

.st-engines {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  gap: 6px;
}
.st-engine {
  display: inline-flex;
  align-items: center;
  height: 30px;
  padding: 0 13px;
  border-radius: var(--r-full);
  border: 1px solid transparent;
  background: transparent;
  color: var(--text-2);
  font-size: 13px;
  font-weight: 500;
  transition: background-color 0.18s, color 0.18s, border-color 0.18s, transform 0.18s var(--ease);
}
.st-engine:hover {
  background: var(--surface-3);
  color: var(--text);
}
.st-engine.is-active {
  color: var(--primary);
  background: var(--primary-soft);
  border-color: var(--primary-soft-2);
  font-weight: 600;
  box-shadow: var(--shadow-xs);
}

.st-hint {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  gap: 7px;
  color: var(--text-3);
  font-size: 12.5px;
}
.st-hint-sep {
  color: var(--border-strong);
}

/* --- 区块标题 --- */
.st-section {
  width: 100%;
  animation: float-in 0.6s var(--ease) 0.1s both;
}
.st-sechead {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 11px;
  padding-inline: 2px;
}
.st-sechead h2 {
  font-size: 12.5px;
  font-weight: 700;
  letter-spacing: 0.1em;
  color: var(--text-3);
}
.st-sechead span,
.st-sechead-link {
  font-size: 12px;
  color: var(--text-3);
}
.st-sechead-link {
  transition: color 0.18s;
}
.st-sechead-link:hover {
  color: var(--primary);
}

/* --- 快捷链接卡片 --- */
.st-quick-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 12px;
}
.st-qcard {
  display: flex;
  flex-direction: column;
  gap: 9px;
  min-width: 0;
  padding: 12px 12px 10px;
  border-radius: var(--r-lg);
  border: 1px solid var(--border);
  background: var(--surface);
  box-shadow: var(--shadow-xs);
  transition: transform 0.2s var(--ease), box-shadow 0.2s var(--ease), border-color 0.2s;
}
.st-qcard:hover {
  transform: translateY(-2px);
  border-color: var(--border-strong);
  box-shadow: var(--shadow-md);
}
.st-qcard-head {
  display: flex;
  align-items: center;
  gap: 9px;
  min-width: 0;
}
.st-qcard-ico {
  display: grid;
  place-items: center;
  width: 28px;
  height: 28px;
  flex: none;
  border-radius: var(--r-xs);
  background: var(--surface-3);
  background: color-mix(in srgb, var(--gc, var(--primary)) 13%, transparent);
  color: var(--gc, var(--primary));
  font-size: 15px;
  line-height: 1;
}
.st-qcard-ico svg {
  width: 16px;
  height: 16px;
}
.st-qcard-name {
  min-width: 0;
  overflow: hidden;
  color: var(--text);
  font-size: 13.5px;
  font-weight: 600;
  white-space: nowrap;
  text-overflow: ellipsis;
}
.st-qcard-count {
  flex: none;
  margin-left: auto;
  color: var(--text-3);
  font-size: 10.5px;
  letter-spacing: 0.02em;
}
.st-qcard-links {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px 3px;
}
.st-qlink {
  display: block;
  min-width: 0;
  padding: 4px 7px;
  border-radius: 7px;
  overflow: hidden;
  color: var(--text-2);
  font-size: 12.5px;
  line-height: 1.5;
  white-space: nowrap;
  text-overflow: ellipsis;
  transition: background-color 0.16s, color 0.16s;
}
.st-qlink:hover {
  background: var(--surface-3);
  color: var(--primary);
}

.st-empty {
  grid-column: 1 / -1;
  padding: 26px 18px;
  border: 1px dashed var(--border-strong);
  border-radius: var(--r-lg);
  background: var(--surface-2);
  color: var(--text-3);
  font-size: 13px;
  text-align: center;
}

/* --- 分类入口 --- */
.st-cats {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 7px;
}
.st-cat {
  height: 30px;
  padding: 0 10px;
  gap: 5px;
  font-size: 12px;
}
.st-cat-dot {
  width: 7px;
  height: 7px;
  flex: none;
  border-radius: 50%;
  background: var(--gc, var(--primary));
}

/* ============================================================
   2. 收录申请页 submit.html
   ============================================================ */
.sub-top {
  position: sticky;
  top: 0;
  z-index: 50;
  background: var(--glass);
  -webkit-backdrop-filter: blur(14px);
  backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--border);
}
.sub-top-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  height: var(--header-h);
  max-width: 1120px;
  margin-inline: auto;
  padding-inline: var(--gutter);
}
.sub-nav {
  display: flex;
  align-items: center;
  gap: 4px;
}

.sub-main {
  position: relative;
  z-index: 1;
  flex: 1 0 auto;
  width: 100%;
  max-width: 1120px;
  margin-inline: auto;
  padding: clamp(26px, 5vh, 52px) var(--gutter) clamp(36px, 6vh, 64px);
}

.sub-card {
  max-width: 720px;
  margin-inline: auto;
  padding: clamp(20px, 4vw, 36px);
  border-radius: var(--r-xl);
  border: 1px solid var(--border);
  background: var(--surface);
  box-shadow: var(--shadow-md);
}

.sub-head {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 8px;
  margin-bottom: 18px;
}
.sub-title {
  font-size: clamp(22px, 3vw, 27px);
  letter-spacing: -0.02em;
}
.sub-subtitle {
  color: var(--text-2);
  font-size: 14px;
  line-height: 1.65;
}

.sub-demo {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  margin-bottom: 22px;
  padding: 12px 14px;
  border-radius: var(--r-md);
  border: 1px solid color-mix(in srgb, var(--warn) 30%, transparent);
  background: var(--warn-soft);
  color: var(--text-2);
  font-size: 12.8px;
  line-height: 1.6;
}
.sub-demo > svg {
  width: 17px;
  height: 17px;
  flex: none;
  margin-top: 2px;
  color: var(--warn);
}
.sub-demo p {
  overflow-wrap: anywhere;
}
.sub-demo strong {
  color: var(--text);
  font-weight: 600;
}
.sub-demo code {
  padding: 1px 5px;
  border-radius: 5px;
  border: 1px solid var(--border);
  background: var(--surface);
  color: var(--text);
  font-family: var(--font-mono);
  font-size: 0.94em;
  overflow-wrap: anywhere;
}

/* 表单 */
.sub-form {
  display: flex;
  flex-direction: column;
  gap: 16px;
}
.sub-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
}
.sub-field {
  display: flex;
  flex-direction: column;
  gap: 6px;
  min-width: 0;
}
.sub-label {
  display: flex;
  align-items: center;
  gap: 4px;
  color: var(--text-2);
  font-size: 13px;
  font-weight: 600;
}
.sub-req {
  color: var(--danger);
}
.sub-input,
.sub-select,
.sub-textarea {
  width: 100%;
  border: 1px solid var(--border);
  border-radius: var(--r-sm);
  background: var(--surface-2);
  color: var(--text);
  font-size: 15px;
  transition: border-color 0.18s, box-shadow 0.18s, background-color 0.18s;
}
.sub-input,
.sub-select {
  height: 44px;
  padding: 0 14px;
}
.sub-textarea {
  min-height: 92px;
  padding: 10px 14px;
  line-height: 1.65;
  resize: vertical;
}
.sub-input::placeholder,
.sub-textarea::placeholder {
  color: var(--text-3);
}
.sub-input:focus,
.sub-input:focus-visible,
.sub-select:focus,
.sub-select:focus-visible,
.sub-textarea:focus,
.sub-textarea:focus-visible {
  outline: none;
  border-color: var(--primary);
  background: var(--surface);
  box-shadow: 0 0 0 3px var(--primary-soft);
}
.sub-select-wrap {
  position: relative;
}
.sub-select {
  -webkit-appearance: none;
  appearance: none;
  padding-right: 40px;
  cursor: pointer;
}
.sub-select-chevron {
  position: absolute;
  top: 50%;
  right: 13px;
  width: 16px;
  height: 16px;
  color: var(--text-3);
  pointer-events: none;
  transform: translateY(-50%);
}

.sub-field.is-invalid .sub-input,
.sub-field.is-invalid .sub-select,
.sub-field.is-invalid .sub-textarea {
  border-color: var(--danger);
  background: var(--surface);
  box-shadow: 0 0 0 3px var(--danger-soft);
}
.sub-error {
  color: var(--danger);
  font-size: 12.5px;
  line-height: 1.5;
  overflow-wrap: anywhere;
}
.sub-error:empty {
  display: none;
}
.sub-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  color: var(--text-3);
  font-size: 12px;
}
.sub-count {
  flex: none;
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
}
.sub-count.is-warn {
  color: var(--warn);
}

.sub-check {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  padding: 11px 14px;
  border-radius: var(--r-sm);
  border: 1px solid var(--border);
  background: var(--surface-2);
  cursor: pointer;
  transition: border-color 0.18s, background-color 0.18s;
}
.sub-check:hover {
  border-color: var(--border-strong);
  background: var(--surface-3);
}
.sub-check input {
  width: 17px;
  height: 17px;
  flex: none;
  margin-top: 2px;
  accent-color: var(--primary);
}
.sub-check span {
  color: var(--text-2);
  font-size: 13.5px;
  line-height: 1.55;
}

.sub-actions {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-top: 6px;
}
.sub-submit {
  height: 46px;
  padding: 0 24px;
  font-size: 14.5px;
}
.sub-submit[disabled] {
  cursor: progress;
  opacity: 0.78;
  transform: none;
  box-shadow: var(--shadow-brand);
}
.sub-spinner {
  display: none;
  width: 16px;
  height: 16px;
  flex: none;
  border-radius: 50%;
  border: 2px solid rgba(255, 255, 255, 0.42);
  border-top-color: #fff;
  animation: spin 0.7s linear infinite;
}
.sub-submit.is-pending .sub-spinner {
  display: block;
}
.sub-note {
  margin-left: auto;
  color: var(--text-3);
  font-size: 12px;
}

/* 成功状态 */
.sub-success {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 12px;
  padding: 12px 0 6px;
  text-align: center;
  animation: float-in 0.45s var(--ease) both;
}
.sub-success-ico {
  display: grid;
  place-items: center;
  width: 64px;
  height: 64px;
  margin-bottom: 4px;
  border-radius: 50%;
  background-image: linear-gradient(135deg, var(--primary) 0%, var(--primary-2) 100%);
  color: #fff;
  box-shadow: var(--shadow-brand);
}
.sub-success-ico svg {
  width: 30px;
  height: 30px;
}
.sub-success h2 {
  font-size: 21px;
}
.sub-success > p {
  max-width: 460px;
  color: var(--text-2);
  font-size: 14px;
  line-height: 1.65;
}
.sub-receipt {
  display: inline-flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  gap: 6px 10px;
  max-width: 100%;
  padding: 9px 16px;
  border-radius: var(--r-sm);
  border: 1px dashed var(--border-strong);
  background: var(--surface-2);
  color: var(--text-2);
  font-size: 13px;
}
.sub-receipt code {
  color: var(--text);
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: 13.5px;
  letter-spacing: 0.04em;
  overflow-wrap: anywhere;
}
.sub-success-site {
  color: var(--text) !important;
  font-size: 13.5px !important;
  font-weight: 600;
}
.sub-success-actions {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 10px;
  margin-top: 6px;
}
.sub-success-hint {
  color: var(--text-3) !important;
  font-size: 12px !important;
}

/* ============================================================
   3. 404 页 404.html
   ============================================================ */
.nf-main {
  position: relative;
  z-index: 1;
  flex: 1 0 auto;
  display: grid;
  place-items: center;
  overflow: hidden;
  padding: clamp(24px, 5vh, 56px) var(--gutter);
  text-align: center;
}
.nf-glow {
  position: absolute;
  top: 50%;
  left: 50%;
  width: min(680px, 92vw);
  height: min(680px, 92vw);
  border-radius: 50%;
  background: radial-gradient(circle at center, rgba(99, 102, 241, 0.18), rgba(6, 182, 212, 0.08) 46%, transparent 68%);
  transform: translate(-50%, -50%);
  pointer-events: none;
}
.nf-box {
  position: relative;
  z-index: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 14px;
  max-width: 620px;
}
.nf-badge {
  display: inline-flex;
  align-items: center;
  height: 24px;
  padding: 0 10px;
  border-radius: var(--r-full);
  border: 1px solid var(--border);
  background: var(--surface);
  color: var(--text-3);
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.16em;
}
.nf-code {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: clamp(88px, 19vw, 190px);
  font-weight: 800;
  line-height: 0.88;
  letter-spacing: -0.06em;
  user-select: none;
}
.nf-desc {
  max-width: 460px;
  color: var(--text-2);
  font-size: 15.5px;
  line-height: 1.7;
}
.nf-actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  gap: 10px;
  margin-top: 6px;
}
.nf-hint {
  color: var(--text-2);
  font-size: 12.5px;
}

/* ============================================================
   4. 响应式
   ============================================================ */
@media (max-width: 1199px) {
  .st-quick-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (max-width: 900px) {
  .st-main {
    gap: 24px;
    padding-top: 22px;
  }
  .st-quick-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 10px;
  }
  .st-clock {
    font-size: clamp(46px, 11vw, 78px);
  }
  .st-search-box {
    height: 58px;
    padding-left: 18px;
  }
  .st-search-btn {
    height: 44px;
    padding: 0 18px;
  }
  .st-search-input {
    font-size: 16px;
  }
  .sub-card {
    padding: 24px;
  }
  .sub-grid {
    gap: 14px;
  }
  .nf-desc {
    font-size: 15px;
  }
}

@media (max-width: 600px) {
  .pg-brand-sub {
    display: none;
  }
  .pg-top-inner {
    gap: 8px;
  }
  .pg-top-sep {
    display: none;
  }
  .pg-top-link {
    padding: 0 8px;
    font-size: 13px;
  }
  .pg-footer {
    padding-bottom: 18px;
  }
  .pg-footer-inner {
    flex-direction: column;
    align-items: center;
    gap: 6px;
    text-align: center;
  }

  .st-main {
    gap: 22px;
    padding-top: 18px;
    padding-bottom: 20px;
  }
  .st-eyebrow {
    font-size: 11.5px;
  }
  .st-clock {
    font-size: clamp(42px, 13.5vw, 66px);
  }
  .st-daterow {
    font-size: 13.5px;
  }
  .st-search {
    gap: 11px;
  }
  .st-search-box {
    height: 54px;
    padding: 6px 6px 6px 16px;
    border-radius: 17px;
    gap: 8px;
  }
  .st-search-ico {
    width: 18px;
    height: 18px;
  }
  .st-search-input {
    font-size: 16px;
  }
  .st-search-btn {
    height: 42px;
    padding: 0 16px;
    border-radius: 13px;
  }
  .st-engine {
    height: 28px;
    padding: 0 11px;
    font-size: 12.5px;
  }
  .st-hint {
    font-size: 12px;
  }
  .st-quick-grid {
    grid-template-columns: minmax(0, 1fr);
  }
  .st-qcard {
    padding: 12px 12px 10px;
  }
  .st-qlink {
    padding: 5px 7px;
    font-size: 13px;
  }
  .st-cat {
    height: 30px;
    font-size: 12px;
  }

  .sub-main {
    padding-top: 20px;
  }
  .sub-card {
    padding: 20px 16px;
    border-radius: var(--r-lg);
  }
  .sub-grid {
    grid-template-columns: minmax(0, 1fr);
  }
  .sub-input,
  .sub-select,
  .sub-textarea {
    font-size: 16px;
  }
  .sub-actions {
    flex-wrap: wrap;
  }
  .sub-submit {
    width: 100%;
  }
  .sub-note {
    display: none;
  }
  .sub-demo {
    font-size: 12.5px;
  }
  .sub-success h2 {
    font-size: 19px;
  }

  .nf-code {
    font-size: clamp(84px, 30vw, 130px);
  }
  .nf-desc {
    font-size: 14.5px;
  }
  .nf-actions {
    width: 100%;
    max-width: 320px;
    flex-direction: column;
    align-items: stretch;
  }
  .nf-actions .btn {
    width: 100%;
  }
}

@media (max-width: 400px) {
  .pg-top-link {
    font-size: 12.5px;
    padding: 0 6px;
  }
  .st-clock {
    font-size: 13vw;
  }
}

/* 矮屏桌面端：收紧纵向节奏，尽量一屏放得下（如 1440×900） */
@media (min-width: 901px) and (max-height: 940px) {
  .st-main {
    gap: 22px;
    padding-top: 14px;
  }
  .st-clock {
    font-size: clamp(46px, 7vw, 78px);
  }
  .st-qcard {
    padding: 10px 11px 8px;
  }
  .st-qlink {
    padding: 3px 7px;
  }
  .st-clock-region {
    gap: 9px;
  }
}

/* 移动端：收紧引擎 chip，保证 7 个在一行内排下 */
@media (max-width: 600px) {
  .st-engines {
    gap: 5px;
  }
  .st-engine {
    height: 28px;
    padding: 0 8px;
    font-size: 12px;
  }
}