/* ==========================================================================
   BOB半岛 / 半岛赛事 —— 全站共享样式
   File: /assets/site.css
   ========================================================================== */

/* --------------------------------------------------------------------------
   1. 设计令牌
   -------------------------------------------------------------------------- */
:root {
  --color-snow-blue: #1B5E8F;
  --color-snow-white: #F5F8FA;
  --color-accent: #FF5A36;
  --color-deep-blue: #0F2B3D;
  --color-ice-blue: #C9E4F0;
  --color-gold: #F4B942;
  --color-gray-blue: #6B7A8C;
  --color-alert: #C1121F;

  --font-sans: "Noto Sans SC", "Noto Sans CJK SC", "PingFang SC", "Microsoft YaHei", system-ui, -apple-system, sans-serif;
  --font-serif: "Noto Serif SC", "Noto Serif CJK SC", "Source Serif SC", "Songti SC", "SimSun", serif;
  --font-mono: "IBM Plex Mono", "Roboto Mono", "SF Mono", "Cascadia Mono", ui-monospace, monospace;

  --header-height: 64px;
  --container-max: 1200px;
  --transition: 0.22s ease;
  --transition-reveal: 0.45s ease;
}

/* --------------------------------------------------------------------------
   2. Reset 与基础排版
   -------------------------------------------------------------------------- */
*,
*::before,
*::after {
  box-sizing: border-box;
}

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

body {
  margin: 0;
  font-family: var(--font-serif);
  font-size: 1rem;
  line-height: 1.8;
  color: var(--color-deep-blue);
  background: var(--color-snow-white);
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
}

main {
  display: block;
}

#main-content:focus {
  outline: none;
}

#main-content,
[data-scroll-target] {
  scroll-margin-top: calc(var(--header-height) + 16px);
}

img {
  max-width: 100%;
  height: auto;
}

a {
  color: var(--color-snow-blue);
}

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-sans);
  color: var(--color-deep-blue);
  line-height: 1.3;
  margin: 0 0 0.5em;
}

h1 {
  font-weight: 200;
  font-size: clamp(2.5rem, 6vw, 6rem);
  line-height: 1.1;
  letter-spacing: 0.02em;
}

h2 {
  font-weight: 700;
  font-size: 1.5rem;
}

h3 {
  font-weight: 700;
  font-size: 1.125rem;
}

p {
  margin: 0 0 1em;
}

ul,
ol {
  margin: 0;
  padding-left: 1.25em;
}

/* --------------------------------------------------------------------------
   3. 容器
   -------------------------------------------------------------------------- */
.container,
.container-narrow {
  width: 100%;
  margin-inline: auto;
  padding-inline: 20px;
}

.container {
  max-width: var(--container-max);
}

.container-narrow {
  max-width: 780px;
}

@media (min-width: 768px) {
  .container,
  .container-narrow {
    padding-inline: 32px;
  }
}

/* --------------------------------------------------------------------------
   4. 焦点与可访问性
   -------------------------------------------------------------------------- */
:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
}

.skip-link {
  position: fixed;
  top: 0;
  left: 8px;
  z-index: 500;
  transform: translateY(-200%);
  background: var(--color-deep-blue);
  color: #fff;
  border: 2px solid var(--color-accent);
  padding: 10px 18px;
  font-family: var(--font-sans);
  font-size: 0.875rem;
  font-weight: 600;
  text-decoration: none;
  transition: transform var(--transition);
}

.skip-link:focus {
  transform: translateY(0);
}

/* --------------------------------------------------------------------------
   5. 头部 —— 紧凑命令栏
   -------------------------------------------------------------------------- */
.scroll-progress {
  position: fixed;
  top: 0;
  left: 0;
  z-index: 300;
  width: 0;
  height: 2px;
  background: var(--color-accent);
  pointer-events: none;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 90;
  background: var(--color-snow-blue);
  border-bottom: 2px solid var(--color-accent);
}

.header-inner {
  display: flex;
  align-items: center;
  gap: 12px;
  min-height: var(--header-height);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  margin-right: auto;
  flex: none;
  text-decoration: none;
}

.brand-mark {
  flex: none;
  width: 26px;
  height: 26px;
  background: var(--color-accent);
  clip-path: polygon(50% 0, 100% 100%, 50% 72%, 0 100%);
}

.brand-text {
  display: flex;
  flex-direction: column;
  line-height: 1;
}

.brand-name {
  font-family: var(--font-sans);
  font-weight: 800;
  font-size: 1.125rem;
  letter-spacing: 0.06em;
  color: #fff;
  line-height: 1.3;
}

.brand-sub {
  font-family: var(--font-mono);
  font-size: 0.625rem;
  letter-spacing: 0.18em;
  color: var(--color-ice-blue);
  line-height: 1.2;
}

.site-nav {
  display: flex;
}

.nav-list {
  display: flex;
  align-items: stretch;
  list-style: none;
  margin: 0;
  padding: 0;
}

.nav-item {
  display: flex;
  align-items: stretch;
}

.nav-link {
  position: relative;
  display: flex;
  align-items: center;
  gap: 5px;
  min-height: var(--header-height);
  padding: 0 13px;
  font-family: var(--font-sans);
  font-size: 0.8125rem;
  font-weight: 500;
  letter-spacing: 0.02em;
  color: rgba(245, 248, 250, 0.85);
  text-decoration: none;
  transition: color var(--transition), background-color var(--transition);
}

.nav-link[aria-current="page"] {
  color: #fff;
}

.nav-index {
  font-family: var(--font-mono);
  font-size: 0.625rem;
  letter-spacing: 0.05em;
  color: var(--color-ice-blue);
  opacity: 0.8;
  transition: color var(--transition), opacity var(--transition);
}

.nav-label {
  white-space: nowrap;
}

@media (min-width: 901px) {
  .nav-item + .nav-item {
    border-left: 1px solid rgba(245, 248, 250, 0.14);
  }

  .nav-link:hover {
    color: #fff;
    background: rgba(15, 43, 61, 0.16);
  }

  .nav-link::after {
    content: "";
    position: absolute;
    left: 13px;
    right: 13px;
    bottom: 0;
    height: 2px;
    background: var(--color-accent);
    transform: scaleX(0);
    transform-origin: left center;
    transition: transform var(--transition);
  }

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

  .nav-link:hover .nav-index,
  .nav-link[aria-current="page"] .nav-index {
    color: var(--color-accent);
    opacity: 1;
  }
}

.header-cta {
  flex: none;
  padding: 8px 14px;
  font-size: 0.8125rem;
  letter-spacing: 0.04em;
}

.cta-full {
  display: inline;
}

.cta-short {
  display: none;
}

.nav-toggle {
  display: none;
  align-items: center;
  gap: 8px;
  margin: 0;
  padding: 7px 10px;
  background: transparent;
  border: 1px solid rgba(245, 248, 250, 0.4);
  color: #fff;
  font-family: var(--font-sans);
  font-size: 0.75rem;
  line-height: 1;
  cursor: pointer;
  transition: background-color var(--transition), border-color var(--transition);
}

.nav-toggle:hover {
  background: rgba(15, 43, 61, 0.18);
  border-color: rgba(245, 248, 250, 0.7);
}

.nav-toggle-box {
  position: relative;
  display: inline-block;
  width: 16px;
  height: 12px;
}

.nav-toggle-bar {
  position: absolute;
  top: 5px;
  left: 0;
  width: 16px;
  height: 2px;
  background: #fff;
  transition: transform var(--transition);
}

.nav-toggle-bar:nth-child(1) {
  transform: translateY(-3px);
}

.nav-toggle-bar:nth-child(2) {
  transform: translateY(3px);
}

.nav-toggle[aria-expanded="true"] .nav-toggle-bar:nth-child(1) {
  transform: translateY(0) rotate(45deg);
}

.nav-toggle[aria-expanded="true"] .nav-toggle-bar:nth-child(2) {
  transform: translateY(0) rotate(-45deg);
}

.nav-toggle-text {
  white-space: nowrap;
}

/* 头部移动端状态 */
@media (max-width: 900px) {
  .header-inner {
    gap: 8px;
    min-height: 56px;
  }

  .brand-name {
    font-size: 1rem;
  }

  .brand-sub {
    font-size: 0.5625rem;
  }

  .header-cta {
    padding: 6px 10px;
    font-size: 0.75rem;
  }

  .nav-toggle {
    display: inline-flex;
  }

  .site-nav {
    position: absolute;
    top: calc(100% + 2px);
    left: 0;
    right: 0;
    display: block;
    background: var(--color-deep-blue);
    border-top: 1px solid rgba(245, 248, 250, 0.2);
    box-shadow: 0 10px 20px rgba(15, 43, 61, 0.3);
    opacity: 0;
    visibility: hidden;
    transform: translateY(-8px);
    transition: opacity var(--transition), transform var(--transition), visibility var(--transition);
  }

  .site-nav[data-open="true"] {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
  }

  .nav-list {
    flex-direction: column;
    align-items: stretch;
    padding: 8px 0;
  }

  .nav-item + .nav-item {
    border-left: 0;
  }

  .nav-link {
    min-height: 44px;
    padding: 0 20px;
    border-left: 3px solid transparent;
    color: rgba(245, 248, 250, 0.8);
  }

  .nav-link::after,
  .nav-link:hover::after,
  .nav-link[aria-current="page"]::after {
    display: none;
  }

  .nav-link:hover,
  .nav-link[aria-current="page"] {
    background: rgba(201, 228, 240, 0.08);
    border-left-color: var(--color-accent);
    color: #fff;
  }
}

@media (max-width: 420px) {
  .cta-full {
    display: none;
  }

  .cta-short {
    display: inline;
  }

  .nav-toggle-text {
    display: none;
  }

  .brand-mark {
    width: 22px;
    height: 22px;
  }

  .brand-name {
    font-size: 0.9375rem;
  }
}

/* --------------------------------------------------------------------------
   6. 页脚
   -------------------------------------------------------------------------- */
.site-footer {
  background: var(--color-deep-blue);
  color: rgba(245, 248, 250, 0.72);
  border-top: 2px solid var(--color-accent);
}

.footer-inner {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr 1.3fr;
  gap: 48px 40px;
  padding-top: 56px;
  padding-bottom: 48px;
}

.footer-brand {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
}

.footer-logo {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-sans);
  font-weight: 800;
  font-size: 1.375rem;
  letter-spacing: 0.04em;
  line-height: 1;
  color: #fff;
}

.footer-logo::before {
  content: "";
  flex: none;
  width: 20px;
  height: 20px;
  background: var(--color-accent);
  clip-path: polygon(50% 0, 100% 100%, 50% 72%, 0 100%);
}

.footer-slogan {
  margin-top: 8px;
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  letter-spacing: 0.22em;
  color: var(--color-accent);
}

.footer-about {
  margin: 18px 0 0;
  max-width: 32em;
  font-family: var(--font-serif);
  font-size: 0.875rem;
  line-height: 1.8;
  color: rgba(245, 248, 250, 0.6);
}

.footer-site-nav,
.footer-legal,
.footer-contact {
  display: flex;
  flex-direction: column;
}

.footer-heading {
  display: flex;
  align-items: center;
  gap: 8px;
  margin: 0 0 18px;
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  font-weight: 400;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--color-ice-blue);
}

.footer-heading::before {
  content: "";
  flex: none;
  width: 8px;
  height: 8px;
  background: var(--color-accent);
}

.footer-link-list {
  display: flex;
  flex-direction: column;
  gap: 10px;
  list-style: none;
  margin: 0;
  padding: 0;
}

.footer-link-list a {
  font-family: var(--font-serif);
  font-size: 0.875rem;
  color: rgba(245, 248, 250, 0.68);
  text-decoration: none;
  transition: color var(--transition), padding-left var(--transition);
}

.footer-link-list a:hover {
  color: var(--color-accent);
  padding-left: 4px;
}

.footer-contact-list {
  display: flex;
  flex-direction: column;
  gap: 8px;
  list-style: none;
  margin: 0;
  padding: 0;
  font-family: var(--font-serif);
  font-size: 0.84375rem;
  line-height: 1.6;
  color: rgba(245, 248, 250, 0.68);
}

.footer-contact-list li {
  position: relative;
  padding-left: 16px;
}

.footer-contact-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.75em;
  width: 6px;
  height: 1px;
  background: var(--color-accent);
}

.footer-bottom {
  border-top: 1px solid rgba(245, 248, 250, 0.14);
  background: rgba(11, 32, 46, 0.7);
}

.footer-bottom-inner {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 24px;
  align-items: center;
  justify-content: center;
  padding-top: 16px;
  padding-bottom: 16px;
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  letter-spacing: 0.06em;
  color: rgba(245, 248, 250, 0.5);
}

.footer-copy,
.footer-icp,
.footer-trust {
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

@media (max-width: 900px) {
  .footer-inner {
    grid-template-columns: 1fr 1fr;
    gap: 40px 24px;
  }
}

@media (max-width: 620px) {
  .footer-inner {
    grid-template-columns: 1fr;
    gap: 36px;
  }
}

/* --------------------------------------------------------------------------
   7. 通用按钮
   -------------------------------------------------------------------------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  padding: 10px 20px;
  border: 1px solid transparent;
  border-radius: 0;
  font-family: var(--font-sans);
  font-size: 0.875rem;
  font-weight: 600;
  line-height: 1.4;
  text-decoration: none;
  cursor: pointer;
  transition: background-color var(--transition), color var(--transition), border-color var(--transition), transform 0.1s ease;
}

.btn:active {
  transform: scale(0.98);
}

.btn-accent {
  background: var(--color-accent);
  color: #fff;
  border-color: var(--color-accent);
}

.btn-accent:hover {
  background: var(--color-deep-blue);
  border-color: var(--color-deep-blue);
  color: #fff;
}

.btn-outline {
  background: transparent;
  color: var(--color-snow-blue);
  border-color: var(--color-snow-blue);
}

.btn-outline:hover {
  background: var(--color-snow-blue);
  color: #fff;
}

/* --------------------------------------------------------------------------
   8. 页面标题区与章节体系
   -------------------------------------------------------------------------- */
.page-header {
  padding: 56px 0 40px;
  margin-bottom: 56px;
  border-bottom: 1px solid rgba(107, 122, 140, 0.3);
}

.page-kicker {
  display: block;
  margin-bottom: 12px;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--color-accent);
}

.page-title {
  margin: 0;
  font-family: var(--font-sans);
  font-weight: 200;
  font-size: clamp(2.25rem, 5vw, 4.5rem);
  line-height: 1.1;
  letter-spacing: 0.04em;
  color: var(--color-deep-blue);
}

.section {
  padding: clamp(56px, 8vw, 96px) 0;
}

.section--tint {
  background: var(--color-ice-blue);
}

.section--dark {
  background: var(--color-deep-blue);
  color: rgba(245, 248, 250, 0.78);
}

.section--dark .section-title,
.section--dark .chapter-title,
.section--dark .page-title,
.section--dark h2,
.section--dark h3 {
  color: #fff;
}

.section--dark .section-lead {
  color: rgba(245, 248, 250, 0.72);
}

.section-header {
  max-width: 720px;
  margin-bottom: 48px;
}

.section-kicker {
  display: block;
  margin-bottom: 8px;
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--color-accent);
}

.section-title {
  margin: 0 0 12px;
  font-family: var(--font-sans);
  font-weight: 200;
  font-size: clamp(2rem, 4vw, 3.5rem);
  line-height: 1.15;
  letter-spacing: 0.03em;
  color: var(--color-deep-blue);
}

.section-lead {
  margin: 0;
  max-width: 42em;
  font-family: var(--font-serif);
  font-size: 1.0625rem;
  line-height: 1.8;
  color: var(--color-gray-blue);
}

.chapter-header {
  display: flex;
  align-items: flex-end;
  gap: 20px;
  margin-bottom: 48px;
  padding-bottom: 20px;
  border-bottom: 1px solid rgba(107, 122, 140, 0.3);
}

.chapter-no {
  flex: none;
  font-family: var(--font-mono);
  font-weight: 200;
  font-size: clamp(3rem, 7vw, 5.5rem);
  line-height: 0.85;
  color: var(--color-accent);
}

.chapter-body {
  flex: 1;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
}

.chapter-label {
  display: block;
  margin-bottom: 6px;
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--color-gray-blue);
}

.chapter-title {
  margin: 0;
  font-family: var(--font-sans);
  font-weight: 200;
  font-size: clamp(1.75rem, 3.5vw, 3rem);
  line-height: 1.15;
  color: var(--color-deep-blue);
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 8px;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--color-accent);
}

.eyebrow::before {
  content: "";
  width: 28px;
  height: 1px;
  background: currentColor;
}

/* --------------------------------------------------------------------------
   9. 栅格与色带
   -------------------------------------------------------------------------- */
.grid {
  display: grid;
  gap: 24px;
}

.grid-2,
.grid-3,
.grid-4 {
  gap: 20px 24px;
}

.grid-2,
.grid-3,
.grid-4 {
  grid-template-columns: 1fr;
}

@media (min-width: 641px) {
  .grid-2 {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .grid-4 {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 901px) {
  .grid-3 {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .grid-4 {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

.band {
  display: block;
  height: 6px;
  margin: 0;
  border: 0;
  background: var(--color-snow-blue);
}

.band--stripes {
  background: repeating-linear-gradient(
    90deg,
    var(--color-snow-blue) 0,
    var(--color-snow-blue) 28px,
    var(--color-ice-blue) 28px,
    var(--color-ice-blue) 40px,
    var(--color-accent) 40px,
    var(--color-accent) 52px,
    var(--color-gold) 52px,
    var(--color-gold) 68px
  );
}

/* --------------------------------------------------------------------------
   10. 卡片、展签、说明牌、数据块
   -------------------------------------------------------------------------- */
.card {
  display: flex;
  flex-direction: column;
  padding: 28px;
  background: var(--color-snow-white);
  border: 1px solid rgba(107, 122, 140, 0.22);
  transition: border-color var(--transition), box-shadow var(--transition), transform var(--transition);
}

.card:hover {
  border-color: var(--color-snow-blue);
  box-shadow: 4px 4px 0 rgba(27, 94, 143, 0.1);
  transform: translate(-1px, -1px);
}

.card-media {
  margin: -28px -28px 20px;
}

.card-meta {
  margin-bottom: 8px;
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--color-gray-blue);
}

.card-title {
  margin: 0 0 10px;
  font-family: var(--font-sans);
  font-size: 1.125rem;
  font-weight: 700;
  line-height: 1.4;
  color: var(--color-deep-blue);
}

.card-text {
  margin: 0 0 16px;
  font-family: var(--font-serif);
  font-size: 0.9375rem;
  line-height: 1.75;
  color: var(--color-gray-blue);
}

.card-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  margin-top: auto;
  font-family: var(--font-sans);
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--color-snow-blue);
  text-decoration: none;
  transition: color var(--transition), gap var(--transition);
}

.card-link::after {
  content: "→";
  font-family: var(--font-mono);
}

.card-link:hover {
  gap: 10px;
  color: var(--color-accent);
}

.tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 10px;
  border: 1px solid currentColor;
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  letter-spacing: 0.08em;
  line-height: 1.4;
  white-space: nowrap;
}

.tag-accent {
  color: var(--color-accent);
}

.tag-blue {
  color: var(--color-snow-blue);
}

.tag-gold {
  color: var(--color-deep-blue);
  background: rgba(244, 185, 66, 0.14);
  border-color: var(--color-gold);
}

.tag-fill {
  color: var(--color-deep-blue);
  background: var(--color-ice-blue);
  border-color: var(--color-ice-blue);
}

.plate {
  padding: 20px 24px;
  background: var(--color-snow-white);
  border: 1px solid rgba(107, 122, 140, 0.2);
  border-left: 3px solid var(--color-accent);
  font-family: var(--font-serif);
  font-size: 0.9375rem;
  line-height: 1.75;
  color: var(--color-gray-blue);
}

.plate-label {
  display: block;
  margin-bottom: 6px;
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--color-snow-blue);
}

.stat {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 24px 20px;
  background: var(--color-snow-white);
  border: 1px solid rgba(107, 122, 140, 0.2);
  border-top: 3px solid var(--color-snow-blue);
}

.stat-value {
  font-family: var(--font-mono);
  font-weight: 300;
  font-size: clamp(1.75rem, 3vw, 2.5rem);
  line-height: 1;
  color: var(--color-deep-blue);
}

.stat-label {
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--color-gray-blue);
}

/* --------------------------------------------------------------------------
   11. 媒体容器（图片占位基础规则）
   -------------------------------------------------------------------------- */
.media {
  position: relative;
  overflow: hidden;
  background: var(--color-ice-blue);
  aspect-ratio: 16 / 9;
}

.media::before {
  content: "IMAGE / 待放置";
  position: absolute;
  inset: 0;
  z-index: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 12px;
  text-align: center;
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  letter-spacing: 0.18em;
  color: rgba(27, 94, 143, 0.55);
  background:
    linear-gradient(45deg, rgba(255, 255, 255, 0.3) 25%, transparent 25%, transparent 75%, rgba(255, 255, 255, 0.3) 75%),
    var(--color-ice-blue);
  background-size: 18px 18px;
}

.media img {
  position: relative;
  z-index: 1;
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.media--portrait {
  aspect-ratio: 3 / 4;
}

.media--wide {
  aspect-ratio: 21 / 9;
}

.media--square {
  aspect-ratio: 1 / 1;
}

/* --------------------------------------------------------------------------
   12. 面包屑
   -------------------------------------------------------------------------- */
.breadcrumb {
  margin-bottom: 24px;
  font-family: var(--font-mono);
  font-size: 0.75rem;
}

.breadcrumb ol {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  list-style: none;
  margin: 0;
  padding: 0;
}

.breadcrumb li + li::before {
  content: "/";
  margin-right: 8px;
  color: var(--color-gray-blue);
  opacity: 0.5;
}

.breadcrumb a {
  color: var(--color-gray-blue);
  text-decoration: none;
  transition: color var(--transition);
}

.breadcrumb a:hover {
  color: var(--color-snow-blue);
}

.breadcrumb [aria-current="page"] {
  color: var(--color-deep-blue);
}

/* --------------------------------------------------------------------------
   13. 滚动显现
   -------------------------------------------------------------------------- */
.js [data-reveal] {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity var(--transition-reveal), transform var(--transition-reveal);
}

.js [data-reveal="true"] {
  opacity: 1;
  transform: none;
}

/* --------------------------------------------------------------------------
   14. 降低动态偏好
   -------------------------------------------------------------------------- */
@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    transition-delay: 0s !important;
  }

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