/* ========== 甜蜜宠所 Site Kit 共享样式 ========== */

/* ---------- 1. 设计令牌 ---------- */
:root {
  --color-page: #FFF8E7;
  --color-purple: #2D1B4E;
  --color-orange: #D96C42;
  --color-cream: #FFF8E7;
  --color-pink: #FFE4EC;
  --color-green: #B8FF29;
  --color-yellow: #F5FF3D;
  --color-new: #FF4D8D;
  --color-update: #1E6FFF;
  --color-done: #00D4B8;
  --color-tag-bg: #D8E2F0;
  --color-ink: #1A1A1A;

  --bg-body: var(--color-page);
  --text-body: var(--color-ink);

  --font-head: "PingFang SC", "Noto Sans CJK SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  --font-body: "Source Han Serif SC", STSong, "Songti SC", "SimSun", serif;
  --font-mono: "JetBrains Mono", "SF Mono", "Cascadia Mono", Consolas, monospace;

  --content-width: 1200px;
  --content-gutter: clamp(1rem, 4vw, 2.5rem);
  --header-h: 78px;

  --radius-sm: 4px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --radius-pill: 999px;

  --shadow-sm: 0 2px 8px rgba(26, 26, 26, .08);
  --shadow-md: 0 6px 20px rgba(26, 26, 26, .14);
  --shadow-lg: 0 12px 32px rgba(26, 26, 26, .18);

  --sp-1: .25rem;
  --sp-2: .5rem;
  --sp-3: .75rem;
  --sp-4: 1rem;
  --sp-5: 1.5rem;
  --sp-6: 2rem;
  --sp-7: 3rem;
  --sp-8: 4.5rem;
}

/* ---------- 2. 重置与基础 ---------- */
*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
}

body {
  min-height: 100vh;
  font-family: var(--font-body);
  font-size: 1rem;
  line-height: 1.6;
  color: var(--text-body);
  background-color: var(--bg-body);
  background-image: radial-gradient(rgba(26, 26, 26, .045) 1px, transparent 1px);
  background-size: 24px 24px;
}

img,
svg {
  display: block;
  max-width: 100%;
}

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

ul,
ol {
  list-style: none;
}

button,
input {
  font: inherit;
  color: inherit;
}

button {
  background: none;
  border: 0;
  cursor: pointer;
}

input {
  border: 0;
  outline: none;
}

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

/* ---------- 3. 无障碍与通用工具 ---------- */
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
  border: 0;
}

:focus-visible {
  outline: 3px solid var(--color-green);
  outline-offset: 2px;
}

.skip-link {
  position: fixed;
  top: -120px;
  left: 1rem;
  z-index: 1200;
  display: inline-block;
  padding: .6em 1.2em;
  background: var(--color-green);
  color: var(--color-ink);
  font-family: var(--font-head);
  font-weight: 700;
  font-size: .875rem;
  border: 2px solid var(--color-ink);
  border-radius: var(--radius-sm);
  transition: top .25s ease;
}

.skip-link:focus-visible {
  top: 1rem;
}

.progress-bar {
  position: fixed;
  top: 0;
  left: 0;
  z-index: 1100;
  height: 3px;
  width: 0;
  background: linear-gradient(90deg, var(--color-green), var(--color-yellow));
  pointer-events: none;
}

/* ---------- 4. 页头 ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--color-purple);
  color: #fff;
}

.header-inner {
  max-width: var(--content-width);
  margin: 0 auto;
  min-height: 72px;
  padding: 0 var(--content-gutter);
  display: flex;
  align-items: center;
  gap: clamp(.75rem, 2vw, 1.75rem);
  position: relative;
}

.brand-block {
  display: flex;
  align-items: center;
  gap: .75rem;
  flex-shrink: 0;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: .6rem;
}

.brand-mark {
  width: 34px;
  height: 34px;
  transition: transform .25s ease;
}

.brand:hover .brand-mark,
.brand:focus-visible .brand-mark {
  transform: rotate(-6deg);
}

.brand-name {
  font-family: var(--font-head);
  font-weight: 700;
  font-size: 1.375rem;
  letter-spacing: .06em;
  white-space: nowrap;
}

.brand-code {
  font-family: var(--font-mono);
  font-size: .5625rem;
  letter-spacing: .14em;
  color: var(--color-green);
  opacity: .65;
  white-space: nowrap;
}

.header-search {
  position: relative;
  margin-left: auto;
  flex-shrink: 0;
}

.header-search-input {
  display: block;
  width: clamp(170px, 20vw, 250px);
  height: 38px;
  padding: 0 .875rem 0 2.35rem;
  border: 1.5px solid rgba(255, 255, 255, .28);
  border-radius: var(--radius-pill);
  background: rgba(255, 255, 255, .08);
  color: #fff;
  font-size: .875rem;
  line-height: 1;
  transition: border-color .2s, background .2s, box-shadow .2s;
}

.header-search-input::placeholder {
  color: rgba(255, 255, 255, .55);
}

.header-search-input:focus {
  border-color: var(--color-green);
  background: rgba(255, 255, 255, .16);
  box-shadow: 0 0 0 3px rgba(184, 255, 41, .25);
}

.header-search-input::-webkit-search-decoration,
.header-search-input::-webkit-search-cancel-button {
  -webkit-appearance: none;
}

.header-search-icon {
  position: absolute;
  left: .8rem;
  top: 50%;
  transform: translateY(-50%);
  color: rgba(255, 255, 255, .6);
  pointer-events: none;
}

.site-nav {
  display: flex;
  align-items: center;
  gap: .5rem;
  flex-shrink: 0;
}

.nav-group {
  display: flex;
  align-items: center;
  gap: .375rem;
}

.nav-group + .nav-group {
  border-left: 1px solid rgba(255, 255, 255, .18);
  padding-left: .75rem;
}

.nav-group-label {
  font-family: var(--font-mono);
  font-size: .5625rem;
  letter-spacing: .18em;
  writing-mode: vertical-rl;
  color: var(--color-yellow);
  opacity: .55;
  margin-right: .25rem;
  user-select: none;
}

.nav-link {
  position: relative;
  display: inline-block;
  padding: .4em .35em;
  font-family: var(--font-head);
  font-size: .875rem;
  font-weight: 600;
  color: rgba(255, 255, 255, .9);
  transition: color .2s;
}

.nav-link::after {
  content: "";
  position: absolute;
  left: .35em;
  right: .35em;
  bottom: 0;
  height: 2px;
  background: var(--color-green);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform .2s ease;
}

.nav-link:hover,
.nav-link:focus-visible {
  color: var(--color-green);
}

.nav-link:hover::after,
.nav-link:focus-visible::after {
  transform: scaleX(1);
}

.nav-link[aria-current="page"] {
  color: var(--color-green);
}

.nav-link[aria-current="page"]::after {
  transform: scaleX(1);
}

.header-tape {
  height: 6px;
  background: repeating-linear-gradient(90deg, var(--color-green) 0 16px, var(--color-yellow) 0 32px, var(--color-new) 0 48px, var(--color-update) 0 64px, var(--color-done) 0 80px);
}

.nav-toggle {
  display: none;
  margin-left: auto;
  width: 44px;
  height: 44px;
  padding: .5rem;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  border: 2px solid rgba(255, 255, 255, .28);
  border-radius: var(--radius-sm);
  transition: border-color .2s;
}

.nav-toggle:hover {
  border-color: var(--color-green);
}

.nav-toggle-bar {
  display: block;
  width: 100%;
  height: 2px;
  background: #fff;
  border-radius: 1px;
  transition: transform .25s ease, opacity .25s ease;
}

.nav-toggle.is-active {
  border-color: var(--color-green);
}

.nav-toggle.is-active .nav-toggle-bar:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.nav-toggle.is-active .nav-toggle-bar:nth-child(2) {
  opacity: 0;
}

.nav-toggle.is-active .nav-toggle-bar:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* ---------- 5. 页脚 ---------- */
.site-footer {
  margin-top: var(--sp-8);
  background: var(--color-ink);
  color: rgba(255, 255, 255, .72);
}

.footer-tape {
  height: 8px;
  background: repeating-linear-gradient(90deg, var(--color-green) 0 16px, var(--color-yellow) 0 32px, var(--color-new) 0 48px, var(--color-update) 0 64px, var(--color-done) 0 80px);
}

.footer-inner {
  max-width: var(--content-width);
  margin: 0 auto;
  padding: var(--sp-7) var(--content-gutter) var(--sp-5);
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1.5fr;
  gap: var(--sp-6);
}

.footer-brand-name {
  display: block;
  font-family: var(--font-head);
  font-weight: 700;
  font-size: 1.75rem;
  letter-spacing: .08em;
  color: var(--color-yellow);
}

.footer-tagline {
  display: block;
  margin-top: .35rem;
  font-size: .875rem;
  color: rgba(255, 255, 255, .55);
}

.footer-icp {
  display: block;
  margin-top: .75rem;
  font-family: var(--font-mono);
  font-size: .75rem;
  color: rgba(255, 255, 255, .55);
}

.footer-col {
  min-width: 0;
}

.footer-col-title {
  display: block;
  font-family: var(--font-mono);
  font-size: .6875rem;
  font-weight: 600;
  letter-spacing: .18em;
  text-transform: uppercase;
  color: var(--color-green);
  margin-bottom: .625rem;
}

.footer-link {
  display: block;
  padding: .3em 0;
  font-size: .875rem;
  color: rgba(255, 255, 255, .7);
  transition: color .2s, transform .2s;
}

.footer-link:hover,
.footer-link:focus-visible {
  color: var(--color-yellow);
  transform: translateX(3px);
}

.footer-contact-item {
  display: block;
  padding: .3em 0;
  font-family: var(--font-mono);
  font-size: .8125rem;
  color: rgba(255, 255, 255, .65);
}

.footer-meta {
  grid-column: 1 / -1;
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: .75rem;
  margin-top: var(--sp-4);
  padding-top: var(--sp-4);
  border-top: 1px solid rgba(255, 255, 255, .14);
  font-family: var(--font-mono);
  font-size: .75rem;
  color: rgba(255, 255, 255, .45);
}

.footer-copy {
  color: rgba(255, 255, 255, .6);
}

.footer-code {
  letter-spacing: .08em;
  color: rgba(255, 255, 255, .4);
}

/* ---------- 6. 正文容器与分区 ---------- */
.page-wrap {
  max-width: var(--content-width);
  margin: 0 auto;
  padding: 0 var(--content-gutter);
}

#main-content {
  scroll-margin-top: calc(var(--header-h) + 8px);
}

.section-block {
  margin: var(--sp-7) 0;
}

.section-title {
  font-family: var(--font-head);
  font-size: clamp(1.625rem, 3.5vw, 2.25rem);
  font-weight: 700;
  line-height: 1.2;
  letter-spacing: .02em;
  margin-bottom: var(--sp-5);
  position: relative;
}

.section-title::before {
  content: "■";
  display: inline-block;
  margin-right: .5rem;
  font-size: .8em;
  color: var(--color-orange);
}

.section-lead {
  max-width: 52em;
  font-size: .9375rem;
  color: rgba(26, 26, 26, .72);
  margin-bottom: var(--sp-5);
}

/* ---------- 7. 面包屑 ---------- */
.breadcrumbs {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: .5rem;
  margin: var(--sp-5) 0 var(--sp-4);
  font-family: var(--font-mono);
  font-size: .75rem;
  color: rgba(26, 26, 26, .55);
}

.breadcrumbs a {
  padding: .15em 0;
  transition: color .2s;
}

.breadcrumbs a:hover,
.breadcrumbs a:focus-visible {
  color: var(--color-orange);
}

.breadcrumbs-sep {
  opacity: .45;
}

/* ---------- 8. 按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: .5rem;
  padding: .55em 1.35em;
  font-family: var(--font-head);
  font-weight: 600;
  font-size: .875rem;
  line-height: 1.4;
  color: var(--color-ink);
  background: var(--color-cream);
  border: 2px solid var(--color-ink);
  border-radius: var(--radius-sm);
  transition: transform .15s ease, box-shadow .15s ease, background .15s ease;
}

.btn:hover,
.btn:focus-visible {
  transform: translate(-2px, -2px);
  box-shadow: 4px 4px 0 var(--color-ink);
}

.btn--primary {
  background: var(--color-green);
}

.btn--dark {
  background: var(--color-purple);
  color: #fff;
}

/* ---------- 9. 首屏错位双色块 ---------- */
.hero-split {
  display: grid;
  grid-template-columns: minmax(0, 1.15fr) minmax(0, .85fr);
  border: 3px solid var(--color-ink);
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: var(--color-purple);
  box-shadow: var(--shadow-lg);
}

.hero-split-main {
  position: relative;
  padding: clamp(2rem, 5vw, 4rem);
  background: var(--color-purple);
  color: #fff;
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.hero-split-side {
  padding: clamp(2rem, 5vw, 4rem);
  background: var(--color-orange);
  color: var(--color-ink);
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.hero-title {
  font-family: var(--font-head);
  font-size: clamp(1.75rem, 4vw, 2.75rem);
  font-weight: 700;
  line-height: 1.15;
  letter-spacing: .03em;
}

.hero-sub {
  font-size: .9375rem;
  margin-top: var(--sp-4);
  max-width: 42em;
  color: rgba(255, 255, 255, .78);
}

.hero-side-title {
  font-family: var(--font-head);
  font-size: 1.125rem;
  font-weight: 700;
}

.hero-side-text {
  font-size: .875rem;
  margin-top: .5rem;
}

/* ---------- 10. 卡片网格与卡片 ---------- */
.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
  gap: var(--sp-5);
}

.card {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: .5rem;
  padding: var(--sp-5);
  background: var(--color-cream);
  border: 2px solid var(--color-ink);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
  transition: transform .2s ease, box-shadow .2s ease, background .2s ease;
}

.card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
}

.card--pink {
  background: var(--color-pink);
}

.card--green {
  background: var(--color-green);
}

.card--yellow {
  background: var(--color-yellow);
}

.card--dark {
  background: var(--color-purple);
  color: #fff;
}

.card-title {
  font-family: var(--font-head);
  font-weight: 700;
  font-size: 1rem;
  line-height: 1.3;
}

.card-meta {
  font-family: var(--font-mono);
  font-size: .75rem;
  color: rgba(26, 26, 26, .55);
}

.card--dark .card-meta {
  color: rgba(255, 255, 255, .55);
}

.card-footer {
  margin-top: auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: .5rem;
}

/* ---------- 11. 磁贴矩阵 ---------- */
.tile-matrix {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: var(--sp-4);
}

.tile {
  position: relative;
  display: block;
  padding: var(--sp-5) var(--sp-4);
  border: 2px solid var(--color-ink);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
  overflow: hidden;
  transition: transform .2s ease, box-shadow .2s ease;
}

.tile:hover,
.tile:focus-visible {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
}

.tile--purple {
  background: var(--color-purple);
  color: #fff;
}

.tile--orange {
  background: var(--color-orange);
  color: var(--color-ink);
}

.tile--pink {
  background: var(--color-pink);
}

.tile--green {
  background: var(--color-green);
}

.tile--yellow {
  background: var(--color-yellow);
}

.tile--blue {
  background: var(--color-update);
  color: #fff;
}

.tile--teal {
  background: var(--color-done);
  color: var(--color-ink);
}

.tile-title {
  display: block;
  font-family: var(--font-head);
  font-weight: 700;
  font-size: 1.125rem;
  line-height: 1.3;
}

.tile-count {
  display: block;
  margin-top: .375rem;
  font-family: var(--font-mono);
  font-size: .75rem;
  opacity: .72;
}

/* ---------- 12. 条目列表行 ---------- */
.entry-list {
  border-top: 2px solid var(--color-ink);
}

.entry-row {
  display: grid;
  grid-template-columns: 2.5rem minmax(0, 1fr) auto auto;
  gap: .75rem;
  align-items: center;
  padding: .7rem 1rem;
  background: var(--color-cream);
  border-bottom: 1px solid rgba(26, 26, 26, .16);
  transition: background .2s ease;
}

.entry-row:hover {
  background: var(--color-pink);
}

.entry-index {
  font-family: var(--font-mono);
  font-size: .75rem;
  font-weight: 600;
  color: rgba(26, 26, 26, .45);
}

.entry-name {
  font-family: var(--font-head);
  font-weight: 600;
  font-size: .9375rem;
  line-height: 1.3;
}

.entry-meta {
  font-family: var(--font-mono);
  font-size: .75rem;
  color: rgba(26, 26, 26, .55);
}

/* ---------- 13. 标签云与标签块 ---------- */
.tag-cloud {
  display: flex;
  flex-wrap: wrap;
  gap: .5rem;
  padding: var(--sp-5);
  background: var(--color-tag-bg);
  border: 2px solid var(--color-ink);
  border-radius: var(--radius-md);
}

.tag-chip {
  display: inline-flex;
  align-items: center;
  gap: .25em;
  padding: .3em .8em;
  font-family: var(--font-head);
  font-weight: 600;
  font-size: .8125rem;
  color: var(--color-ink);
  background: var(--color-cream);
  border: 1.5px solid var(--color-ink);
  border-radius: var(--radius-pill);
  transition: background .2s, transform .15s;
}

.tag-chip:hover,
.tag-chip:focus-visible {
  background: var(--color-green);
  transform: translateY(-2px);
}

.tag-chip--s {
  font-size: .71875rem;
  background: var(--color-yellow);
}

.tag-chip--m {
  font-size: .8125rem;
  background: var(--color-cream);
}

.tag-chip--l {
  font-size: .9375rem;
  background: var(--color-pink);
}

/* ---------- 14. 状态徽标 ---------- */
.status-badge {
  display: inline-flex;
  align-items: center;
  gap: .35em;
  padding: .28em .7em;
  font-family: var(--font-mono);
  font-size: .71875rem;
  font-weight: 600;
  line-height: 1;
  border-radius: var(--radius-pill);
  white-space: nowrap;
}

.status-badge--new {
  background: var(--color-new);
  color: #fff;
}

.status-badge--update {
  background: var(--color-update);
  color: #fff;
}

.status-badge--update::before {
  content: "";
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: currentColor;
  animation: pulse-dot 1.6s ease-in-out infinite;
}

.status-badge--done {
  background: var(--color-done);
  color: var(--color-ink);
}

@keyframes pulse-dot {
  0%, 100% {
    opacity: 1;
  }
  50% {
    opacity: .25;
  }
}

/* ---------- 15. 榜单与计分板 ---------- */
.rank-list {
  border-top: 2px solid var(--color-ink);
}

.rank-row {
  display: grid;
  grid-template-columns: 3rem minmax(0, 1fr) auto;
  gap: 1rem;
  align-items: center;
  padding: .875rem 1rem;
  background: var(--color-cream);
  border-bottom: 1px solid rgba(26, 26, 26, .16);
  transition: background .2s ease;
}

.rank-row:hover {
  background: var(--color-pink);
}

.serial-mark {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 1.5rem;
  line-height: 1;
  color: rgba(26, 26, 26, .22);
}

.serial-mark--top {
  color: var(--color-orange);
}

.rank-name {
  font-family: var(--font-head);
  font-weight: 600;
  font-size: .9375rem;
}

.rank-metric {
  display: flex;
  align-items: center;
  gap: .75rem;
}

.metric-bar {
  width: 120px;
  height: 6px;
  background: rgba(26, 26, 26, .1);
  border-radius: 3px;
  overflow: hidden;
}

.metric-bar-fill {
  display: block;
  height: 100%;
  background: var(--color-green);
}

.metric-bar-fill--hot {
  background: var(--color-orange);
}

.metric-bar-fill--top {
  background: var(--color-update);
}

.trend-mark {
  font-family: var(--font-mono);
  font-size: .71875rem;
  font-weight: 600;
}

.trend-mark--up {
  color: var(--color-new);
}

.trend-mark--down {
  color: var(--color-update);
}

.trend-mark--flat {
  color: rgba(26, 26, 26, .38);
}

/* ---------- 16. 索引条 ---------- */
.index-bar {
  display: flex;
  flex-wrap: wrap;
  gap: .375rem;
}

.index-link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 32px;
  height: 32px;
  padding: 0 .5em;
  font-family: var(--font-mono);
  font-size: .8125rem;
  font-weight: 600;
  color: var(--color-ink);
  background: var(--color-cream);
  border: 1.5px solid var(--color-ink);
  border-radius: var(--radius-sm);
  transition: background .2s, color .2s, transform .15s;
}

.index-link:hover,
.index-link:focus-visible {
  background: var(--color-yellow);
  transform: translateY(-2px);
}

.index-link--active {
  background: var(--color-ink);
  color: var(--color-yellow);
}

/* ---------- 17. 横向滑轨 ---------- */
.h-scroll {
  display: flex;
  gap: var(--sp-4);
  overflow-x: auto;
  scroll-snap-type: x mandatory;
  padding: .25rem .25rem var(--sp-4);
  -webkit-overflow-scrolling: touch;
}

.h-scroll > * {
  flex: 0 0 auto;
  scroll-snap-align: start;
}

.h-scroll::-webkit-scrollbar {
  height: 6px;
}

.h-scroll::-webkit-scrollbar-thumb {
  background: var(--color-ink);
  border-radius: 3px;
}

/* ---------- 18. 对照表 ---------- */
.dt-grid {
  border: 2px solid var(--color-ink);
  border-radius: var(--radius-md);
  overflow: hidden;
  background: var(--color-cream);
}

.dt-row {
  display: grid;
  grid-template-columns: 150px 1fr;
}

.dt-row + .dt-row {
  border-top: 1px solid rgba(26, 26, 26, .14);
}

.dt-th {
  padding: .7rem 1rem;
  background: var(--color-purple);
  color: #fff;
  font-family: var(--font-head);
  font-size: .8125rem;
  font-weight: 700;
}

.dt-td {
  padding: .7rem 1rem;
  font-size: .875rem;
}

/* ---------- 19. 筛选双栏 ---------- */
.filter-layout {
  display: grid;
  grid-template-columns: 260px minmax(0, 1fr);
  gap: var(--sp-6);
  align-items: start;
}

.filter-panel {
  position: sticky;
  top: calc(var(--header-h) + 16px);
  padding: var(--sp-5);
  background: var(--color-pink);
  border: 2px solid var(--color-ink);
  border-radius: var(--radius-md);
}

.filter-title {
  font-family: var(--font-head);
  font-weight: 700;
  font-size: 1rem;
  margin-bottom: var(--sp-4);
  display: flex;
  align-items: center;
  gap: .5rem;
}

.filter-option {
  display: flex;
  align-items: center;
  gap: .5rem;
  width: 100%;
  padding: .45em .25em;
  font-size: .875rem;
  background: none;
  border-radius: var(--radius-sm);
  transition: background .15s;
}

.filter-option:hover {
  background: rgba(26, 26, 26, .05);
}

.filter-option input {
  accent-color: var(--color-orange);
}

.filter-results {
  min-width: 0;
}

/* ---------- 20. 媒体容器 ---------- */
.media-frame {
  position: relative;
  display: block;
  overflow: hidden;
  aspect-ratio: 16 / 10;
  border: 2px solid var(--color-ink);
  border-radius: var(--radius-md);
  background: var(--color-tag-bg);
}

.media-frame img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform .35s ease;
}

.media-frame:hover img {
  transform: scale(1.03);
}

/* ---------- 21. 显现动画 ---------- */
[data-reveal] {
  opacity: 0;
  transform: translateY(14px);
  transition: opacity .4s ease, transform .4s ease;
}

[data-reveal].is-revealed {
  opacity: 1;
  transform: none;
}

/* ---------- 22. 响应式断点 ---------- */
@media (max-width: 1100px) {
  .brand-code {
    display: none;
  }

  .header-search-input,
  .header-search-input:focus {
    width: 170px;
  }
}

@media (max-width: 900px) {
  .header-inner {
    flex-wrap: wrap;
    min-height: 64px;
    padding-top: .75rem;
    padding-bottom: .75rem;
    gap: .75rem;
    position: static;
  }

  .header-search {
    order: 3;
    width: 100%;
    margin-left: 0;
  }

  .header-search-input,
  .header-search-input:focus {
    width: 100%;
  }

  .nav-toggle {
    display: inline-flex;
    margin-left: auto;
  }

  .site-nav {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    flex-direction: column;
    align-items: stretch;
    gap: 1.5rem;
    padding: 1.5rem var(--content-gutter) 2rem;
    background: var(--color-purple);
    border-top: 2px solid var(--color-green);
    box-shadow: var(--shadow-lg);
  }

  .site-nav[data-open] {
    display: flex;
  }

  .nav-group {
    flex-direction: column;
    align-items: stretch;
    gap: .125rem;
  }

  .nav-group + .nav-group {
    border-left: 0;
    padding-left: 0;
  }

  .nav-group-label {
    writing-mode: horizontal-tb;
    margin: 0 0 .5rem 0;
    font-size: .6875rem;
    opacity: .6;
  }

  .nav-link {
    width: 100%;
    padding: .45em 0;
    font-size: 1rem;
    border-bottom: 1px solid rgba(255, 255, 255, .1);
  }

  .nav-link::after {
    display: none;
  }

  .nav-link[aria-current="page"] {
    background: rgba(184, 255, 41, .12);
    padding-left: .5em;
    border-radius: var(--radius-sm);
  }

  .header-tape {
    height: 4px;
  }

  .filter-layout {
    grid-template-columns: 1fr;
  }

  .filter-panel {
    position: static;
  }

  .hero-split {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 720px) {
  .footer-inner {
    grid-template-columns: 1fr;
    gap: var(--sp-5);
    padding-top: var(--sp-6);
  }

  .footer-meta {
    flex-direction: column;
  }
}

@media (max-width: 600px) {
  .brand-name {
    font-size: 1.125rem;
  }

  .brand-mark {
    width: 30px;
    height: 30px;
  }

  .section-block {
    margin: var(--sp-6) 0;
  }

  .card-grid {
    grid-template-columns: 1fr;
  }

  .tile-matrix {
    grid-template-columns: 1fr 1fr;
    gap: var(--sp-3);
  }

  .entry-row {
    grid-template-columns: 2rem minmax(0, 1fr) auto;
  }

  .entry-meta {
    display: none;
  }

  .dt-row {
    grid-template-columns: 100px 1fr;
  }

  .rank-row {
    grid-template-columns: 2.5rem minmax(0, 1fr);
  }

  .rank-metric {
    display: none;
  }
}

/* ---------- 23. 减少动态偏好 ---------- */
@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  *,
  *::before,
  *::after {
    transition-duration: .01ms !important;
    animation-duration: .01ms !important;
    animation-iteration-count: 1 !important;
  }

  [data-reveal] {
    opacity: 1;
    transform: none;
    transition: none;
  }

  .status-badge--update::before {
    animation: none;
  }
}