/* ================================================
   宝威体育 · 全站共享 CSS
   文件路径：/assets/site.css
   ================================================ */

/* ---------- Reset ---------- */
*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-padding-top: calc(var(--header-height) + 1rem);
}

html,
body {
  overflow-x: hidden;
}

body {
  font-family: var(--font-body);
  font-size: 1rem;
  line-height: 1.75;
  background-color: var(--color-bg);
  color: var(--color-text-dark);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

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

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

ul,
ol {
  list-style: none;
}

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

h1,
h2,
h3,
h4 {
  font-family: var(--font-heading);
  line-height: 1.15;
  font-weight: 900;
  color: inherit;
}

p {
  max-width: 65ch;
}

::selection {
  background: var(--color-primary);
  color: var(--color-bg);
}

::-webkit-scrollbar {
  width: 0.65rem;
}

::-webkit-scrollbar-track {
  background: var(--color-bg);
}

::-webkit-scrollbar-thumb {
  background: var(--color-bg-deep);
  border: 1px solid rgba(57, 255, 20, 0.2);
  border-radius: 2px;
}

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

/* ---------- 设计变量 ---------- */
:root {
  --color-bg: #0A192F;
  --color-bg-deep: #112240;
  --color-bg-light: #F5F7FA;
  --color-primary: #39FF14;
  --color-secondary: #FF6B35;
  --color-accent: #00E5FF;
  --color-text-dark: #E6F1FF;
  --color-text-dim: #8892B0;
  --color-text-light: #0A192F;
  --color-border-light: rgba(10, 25, 47, 0.15);
  --color-border-dark: rgba(230, 241, 255, 0.1);

  --font-heading: "Archivo Black", "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
  --font-body: "Inter", "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
  --font-mono: "Roboto Mono", "SFMono-Regular", Consolas, "Liberation Mono", monospace;

  --header-height: 4.5rem;
  --content-width: 76rem;
  --content-narrow: 50rem;

  --space-1: 0.5rem;
  --space-2: 1rem;
  --space-3: 2rem;
  --space-4: 4rem;
  --space-5: 6rem;
  --space-6: 8rem;

  --duration: 0.25s;
  --ease: cubic-bezier(0.4, 0, 0.2, 1);
  color-scheme: dark;
}

/* ---------- 工具类 ---------- */
.visually-hidden {
  position: absolute !important;
  width: 1px !important;
  height: 1px !important;
  padding: 0 !important;
  margin: -1px !important;
  overflow: hidden !important;
  clip: rect(0 0 0 0) !important;
  white-space: nowrap !important;
  border: 0 !important;
}

.container {
  width: min(100% - 2rem, var(--content-width));
  margin-inline: auto;
}

.content-narrow {
  width: min(100% - 2rem, var(--content-narrow));
  margin-inline: auto;
}

/* ---------- 跳转链接 ---------- */
.skip-link {
  position: fixed;
  top: 0.75rem;
  left: 0.75rem;
  z-index: 1000;
  padding: 0.75rem 1.25rem;
  background: var(--color-primary);
  color: var(--color-bg);
  font-weight: 700;
  font-size: 0.875rem;
  border-radius: 2px;
  transform: translateY(-250%);
  transition: transform var(--duration) var(--ease);
}

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

/* ---------- 页头 ---------- */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  height: var(--header-height);
  background-color: transparent;
  border-bottom: 1px solid transparent;
  transition: background-color var(--duration) var(--ease),
    border-color var(--duration) var(--ease),
    box-shadow var(--duration) var(--ease);
}

.site-header::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 0;
  background: linear-gradient(180deg, rgba(10, 25, 47, 0.72) 0%, rgba(10, 25, 47, 0.12) 100%);
  pointer-events: none;
  transition: opacity var(--duration) var(--ease);
}

.site-header.is-scrolled {
  background-color: rgba(10, 25, 47, 0.96);
  border-bottom-color: rgba(57, 255, 20, 0.14);
  box-shadow: 0 4px 24px rgba(0, 0, 0, 0.3);
}

.site-header.is-scrolled::before {
  opacity: 0;
}

.site-header__inner {
  position: relative;
  z-index: 1;
  display: flex;
  align-items: center;
  gap: var(--space-2);
  height: 100%;
  width: min(100% - 2rem, var(--content-width));
  margin-inline: auto;
}

.site-header__progress {
  position: absolute;
  bottom: 0;
  left: 0;
  z-index: 3;
  height: 2px;
  width: 0%;
  background: linear-gradient(90deg, var(--color-primary), var(--color-accent));
  transition: width 0.1s linear;
}

/* ---------- 品牌 ---------- */
.site-brand {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  flex-shrink: 0;
}

.site-brand__mark {
  display: block;
  width: 2.25rem;
  height: 2.25rem;
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary) 40%, var(--color-secondary) 42%, var(--color-secondary) 100%);
  clip-path: polygon(0 0, 100% 0, 100% 78%, 78% 100%, 0 100%);
  transition: transform var(--duration) var(--ease);
}

.site-brand:hover .site-brand__mark,
.site-brand:focus-visible .site-brand__mark {
  transform: rotate(-6deg) scale(1.05);
}

.site-brand__text {
  display: flex;
  flex-direction: column;
  line-height: 1.2;
}

.site-brand__text strong {
  font-family: var(--font-heading);
  font-size: 1.125rem;
  letter-spacing: 0.08em;
  color: var(--color-text-dark);
}

.site-brand__text small {
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  color: var(--color-text-dim);
  letter-spacing: 0.16em;
}

.site-brand--footer .site-brand__mark {
  width: 2.5rem;
  height: 2.5rem;
}

/* ---------- 导航 ---------- */
.site-nav {
  margin-left: auto;
}

.site-nav__list {
  display: flex;
  align-items: center;
  gap: 0.25rem;
}

.site-nav__item {
  margin: 0;
}

.site-nav__link {
  position: relative;
  display: inline-block;
  padding: 0.625rem 0.875rem;
  font-size: 0.9375rem;
  font-weight: 500;
  color: var(--color-text-dark);
  letter-spacing: 0.02em;
  transition: color var(--duration) var(--ease);
}

.site-nav__link::after {
  content: "";
  position: absolute;
  left: 0.875rem;
  right: 0.875rem;
  bottom: 0.375rem;
  height: 2px;
  background: var(--color-primary);
  transform: scaleX(0);
  transform-origin: right;
  transition: transform var(--duration) var(--ease);
}

.site-nav__link:hover,
.site-nav__link:focus-visible {
  color: var(--color-accent);
}

.site-nav__link:hover::after,
.site-nav__link:focus-visible::after,
.site-nav__link[aria-current="page"]::after {
  transform: scaleX(1);
  transform-origin: left;
}

.site-nav__link[aria-current="page"] {
  color: var(--color-primary);
}

.site-nav__item--cta {
  display: none;
}

/* ---------- 页头 CTA ---------- */
.site-header__cta {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.5rem 1.25rem;
  background: linear-gradient(135deg, var(--color-secondary), #ff8a55);
  color: var(--color-bg);
  font-weight: 700;
  font-size: 0.875rem;
  letter-spacing: 0.06em;
  border-radius: 2px;
  white-space: nowrap;
  box-shadow: 0 2px 0 rgba(0, 0, 0, 0.2);
  transition: background var(--duration) var(--ease),
    box-shadow var(--duration) var(--ease),
    transform var(--duration) var(--ease);
}

.site-header__cta:hover,
.site-header__cta:focus-visible {
  background: linear-gradient(135deg, var(--color-primary), #6cff52);
  box-shadow: 0 0 20px rgba(57, 255, 20, 0.35);
  transform: translateY(-1px);
}

/* ---------- 移动端导航按钮 ---------- */
.nav-toggle {
  display: none;
  margin-left: auto;
  padding: 0.5rem;
  border: 1px solid rgba(230, 241, 255, 0.18);
  border-radius: 4px;
  line-height: 0;
}

.nav-toggle__bar {
  display: block;
  width: 1.25rem;
  height: 2px;
  background: var(--color-text-dark);
  margin: 4px 0;
  border-radius: 1px;
  transition: transform var(--duration) var(--ease),
    opacity var(--duration) var(--ease);
}

.nav-toggle[aria-expanded="true"] .nav-toggle__bar:nth-child(1) {
  transform: translateY(6px) rotate(45deg);
}

.nav-toggle[aria-expanded="true"] .nav-toggle__bar:nth-child(2) {
  opacity: 0;
}

.nav-toggle[aria-expanded="true"] .nav-toggle__bar:nth-child(3) {
  transform: translateY(-6px) rotate(-45deg);
}

/* ---------- 移动端导航（< 960px） ---------- */
@media (max-width: 959px) {
  .site-header__cta {
    display: none;
  }

  .nav-toggle {
    display: block;
  }

  .site-nav {
    margin-left: 0;
    position: fixed;
    top: var(--header-height);
    left: 0;
    right: 0;
    bottom: 0;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: flex-start;
    padding-top: var(--space-4);
    overflow-y: auto;
    background: rgba(10, 25, 47, 0.97);
    transform: translateY(12px);
    opacity: 0;
    visibility: hidden;
    transition: opacity var(--duration) var(--ease),
      transform var(--duration) var(--ease),
      visibility 0s linear var(--duration);
  }

  .site-nav::before {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--color-primary), var(--color-accent) 60%, transparent 100%);
  }

  .site-nav[data-open] {
    transform: translateY(0);
    opacity: 1;
    visibility: visible;
    transition: opacity var(--duration) var(--ease),
      transform var(--duration) var(--ease),
      visibility 0s;
  }

  .site-nav__list {
    flex-direction: column;
    align-items: stretch;
    width: min(100% - 2rem, 30rem);
  }

  .site-nav__link {
    display: block;
    padding: 0.875rem var(--space-2);
    font-size: 1.0625rem;
    text-align: center;
    border-bottom: 1px solid rgba(230, 241, 255, 0.08);
  }

  .site-nav__link::after {
    display: none;
  }

  .site-nav__link:hover,
  .site-nav__link:focus-visible {
    color: var(--color-primary);
    background: rgba(57, 255, 20, 0.06);
  }

  .site-nav__link[aria-current="page"] {
    color: var(--color-primary);
    border-left: 3px solid var(--color-primary);
    padding-left: calc(var(--space-2) - 3px);
  }

  .site-nav__item--cta {
    display: block;
    margin-top: var(--space-3);
    padding-top: var(--space-2);
    border-top: 1px solid rgba(230, 241, 255, 0.08);
  }

  .site-nav__link--cta {
    display: block;
    margin: 0 auto;
    padding: 0.875rem 2rem;
    width: fit-content;
    background: linear-gradient(135deg, var(--color-secondary), #ff8a55);
    color: var(--color-bg) !important;
    font-weight: 700;
    border-radius: 2px;
    border-bottom: none;
    letter-spacing: 0.08em;
  }
}

/* ---------- 页脚 ---------- */
.site-footer {
  position: relative;
  overflow: hidden;
  background: var(--color-bg-deep);
  border-top: 2px solid rgba(57, 255, 20, 0.22);
}

.site-footer::before {
  content: "";
  position: absolute;
  top: 0;
  right: -6rem;
  width: 40%;
  height: 100%;
  background: linear-gradient(180deg, rgba(0, 229, 255, 0.05), transparent 60%);
  transform: skewX(-10deg);
  pointer-events: none;
}

.site-footer__inner {
  position: relative;
  z-index: 1;
  display: grid;
  gap: var(--space-4);
  width: min(100% - 2rem, var(--content-width));
  margin-inline: auto;
  padding-block: var(--space-5) var(--space-4);
}

.site-footer__brand p {
  margin-top: var(--space-2);
  color: var(--color-text-dim);
  font-size: 0.9375rem;
  line-height: 1.7;
}

.site-footer__nav {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-3);
}

.site-footer__col h3,
.site-footer__contact h3 {
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.18em;
  color: var(--color-primary);
  margin-bottom: var(--space-2);
}

.site-footer__col ul {
  display: grid;
  gap: 0.625rem;
}

.site-footer__col a {
  display: inline-block;
  color: var(--color-text-dark);
  font-size: 0.9375rem;
  opacity: 0.82;
  transition: color var(--duration) var(--ease),
    opacity var(--duration) var(--ease),
    padding-left var(--duration) var(--ease);
}

.site-footer__col a:hover,
.site-footer__col a:focus-visible {
  color: var(--color-accent);
  opacity: 1;
  padding-left: 0.25rem;
}

.site-footer__contact-line {
  display: flex;
  gap: var(--space-2);
  margin-bottom: 0.75rem;
  font-size: 0.9rem;
  color: var(--color-text-dim);
}

.site-footer__contact-label {
  flex-shrink: 0;
  min-width: 3.5rem;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--color-text-dim);
  padding-top: 4px;
}

.site-footer__contact-note {
  margin-top: var(--space-2);
  padding-top: var(--space-2);
  border-top: 1px solid rgba(230, 241, 255, 0.08);
  font-size: 0.75rem;
  color: var(--color-text-dim);
  line-height: 1.7;
  max-width: 42ch;
}

.site-footer__meta {
  position: relative;
  z-index: 1;
  border-top: 1px solid rgba(230, 241, 255, 0.08);
  background: rgba(10, 25, 47, 0.5);
}

.site-footer__meta-inner {
  width: min(100% - 2rem, var(--content-width));
  margin-inline: auto;
  padding-block: var(--space-2);
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2) var(--space-3);
  justify-content: space-between;
  align-items: center;
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  color: var(--color-text-dim);
}

.site-footer__trust {
  max-width: 56ch;
  font-size: 0.75rem;
  line-height: 1.6;
}

/* ---------- 按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.75rem 1.75rem;
  background: var(--color-bg-deep);
  color: var(--color-text-dark);
  font-family: var(--font-body);
  font-size: 0.9375rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  border: 1px solid var(--color-border-dark);
  border-radius: 4px;
  cursor: pointer;
  transition: background-color var(--duration) var(--ease),
    color var(--duration) var(--ease),
    border-color var(--duration) var(--ease),
    box-shadow var(--duration) var(--ease),
    transform var(--duration) var(--ease);
}

.btn:hover,
.btn:focus-visible {
  border-color: var(--color-accent);
  color: var(--color-accent);
  box-shadow: 0 0 0 1px rgba(0, 229, 255, 0.3),
    0 4px 16px rgba(0, 229, 255, 0.15);
  transform: translateY(-1px);
}

.btn--primary {
  background: var(--color-primary);
  border-color: var(--color-primary);
  color: var(--color-bg);
  font-weight: 700;
}

.btn--primary:hover,
.btn--primary:focus-visible {
  background: var(--color-accent);
  border-color: var(--color-accent);
  color: var(--color-bg);
  box-shadow: 0 4px 20px rgba(0, 229, 255, 0.3);
}

.btn--ghost {
  background: transparent;
  border-color: rgba(57, 255, 20, 0.4);
  color: var(--color-primary);
}

.btn--ghost:hover,
.btn--ghost:focus-visible {
  background: rgba(57, 255, 20, 0.1);
  border-color: var(--color-primary);
  color: var(--color-primary);
}

/* ---------- 标签 ---------- */
.tag {
  display: inline-flex;
  align-items: center;
  padding: 0.25rem 0.75rem;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.1em;
  background: rgba(57, 255, 20, 0.12);
  color: var(--color-primary);
  border: 1px solid rgba(57, 255, 20, 0.3);
  border-radius: 2px;
}

.tag--hot {
  background: rgba(255, 107, 53, 0.12);
  border-color: rgba(255, 107, 53, 0.35);
  color: var(--color-secondary);
}

/* ---------- 面包屑 ---------- */
.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.5rem;
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  color: var(--color-text-dim);
}

.breadcrumb a {
  color: var(--color-text-dim);
  transition: color var(--duration) var(--ease);
}

.breadcrumb a:hover,
.breadcrumb a:focus-visible {
  color: var(--color-accent);
}

.breadcrumb__separator {
  opacity: 0.5;
}

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

/* ---------- 章节 ---------- */
.section {
  position: relative;
  padding-block: clamp(4rem, 10vw, var(--space-6));
}

.section--light {
  background: var(--color-bg-light);
  color: var(--color-text-light);
}

.section--light p {
  color: rgba(10, 25, 47, 0.75);
}

.section__header {
  display: flex;
  align-items: baseline;
  gap: var(--space-2);
  margin-bottom: var(--space-4);
  padding-bottom: var(--space-2);
  border-bottom: 1px dashed var(--color-border-dark);
}

.section--light .section__header {
  border-color: var(--color-border-light);
}

.section__number {
  font-family: var(--font-mono);
  font-size: 0.875rem;
  color: var(--color-primary);
  letter-spacing: 0.2em;
}

.section--light .section__number {
  color: var(--color-secondary);
}

.section__title {
  font-size: clamp(1.875rem, 5vw, 2.5rem);
  letter-spacing: 0.02em;
}

/* ---------- 网格 ---------- */
.grid {
  display: grid;
  gap: var(--space-3);
}

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

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

@media (min-width: 768px) {
  .grid--two {
    grid-template-columns: repeat(2, 1fr);
  }

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

@media (min-width: 1024px) {
  .grid--three {
    grid-template-columns: repeat(3, 1fr);
  }
}

/* ---------- 卡片 ---------- */
.card {
  position: relative;
  background: var(--color-bg-deep);
  border: 1px solid var(--color-border-dark);
  border-radius: 4px;
  padding: var(--space-3);
  transition: transform var(--duration) var(--ease),
    border-color var(--duration) var(--ease),
    box-shadow var(--duration) var(--ease);
}

.card:hover,
.card:focus-within {
  transform: translateY(-4px);
  border-color: rgba(0, 229, 255, 0.5);
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.35),
    0 0 0 1px rgba(0, 229, 255, 0.2);
}

.card--light {
  background: #ffffff;
  border-color: var(--color-border-light);
}

.card__title {
  font-family: var(--font-heading);
  font-size: 1.5rem;
  line-height: 1.2;
  margin-bottom: var(--space-1);
}

.card__meta {
  font-family: var(--font-mono);
  font-size: 0.8125rem;
  color: var(--color-text-dim);
  letter-spacing: 0.08em;
  margin-bottom: var(--space-2);
}

.card__action {
  display: inline-block;
  margin-top: var(--space-2);
  color: var(--color-primary);
  font-weight: 600;
  font-size: 0.9375rem;
  transition: color var(--duration) var(--ease);
}

.card__action::after {
  content: "\2192";
  display: inline-block;
  margin-left: 0.25rem;
  transition: transform var(--duration) var(--ease);
}

.card__action:hover,
.card__action:focus-visible {
  color: var(--color-accent);
}

.card__action:hover::after,
.card__action:focus-visible::after {
  transform: translateX(4px);
}

/* ---------- 面板 ---------- */
.panel {
  position: relative;
  background: var(--color-bg-deep);
  border: 1px solid var(--color-border-dark);
  padding: var(--space-4);
  clip-path: polygon(28px 0, 100% 0, 100% calc(100% - 28px), calc(100% - 28px) 100%, 0 100%, 0 28px);
}

.panel::after {
  content: "";
  position: absolute;
  top: 0;
  left: var(--space-4);
  right: var(--space-4);
  height: 2px;
  background: linear-gradient(90deg, rgba(57, 255, 20, 0.55), transparent 65%);
}

/* ---------- 首屏框景 ---------- */
.hero-frame {
  position: relative;
  max-width: var(--content-narrow);
  margin-inline: auto;
  padding: var(--space-4);
  background: rgba(17, 34, 64, 0.66);
  border: 1px solid rgba(230, 241, 255, 0.16);
  clip-path: polygon(28px 0, 100% 0, 100% calc(100% - 28px), calc(100% - 28px) 100%, 0 100%, 0 28px);
}

.hero-frame::before {
  content: "";
  position: absolute;
  top: 1rem;
  left: var(--space-4);
  right: var(--space-4);
  height: 4px;
  background: repeating-linear-gradient(90deg, rgba(0, 229, 255, 0.65) 0 2px, transparent 2px 12px);
}

.hero-frame::after {
  content: "";
  position: absolute;
  bottom: 1rem;
  left: var(--space-4);
  right: var(--space-4);
  height: 3px;
  background: linear-gradient(90deg, var(--color-primary), var(--color-accent) 55%, transparent);
  opacity: 0.55;
}

/* ---------- 图片占位容器 ---------- */
.image-frame {
  position: relative;
  aspect-ratio: 16 / 10;
  background: linear-gradient(135deg, var(--color-bg-deep), var(--color-bg));
  border: 1px dashed rgba(230, 241, 255, 0.2);
  overflow: hidden;
  clip-path: polygon(0 0, calc(100% - 20px) 0, 100% 20px, 100% 100%, 20px 100%, 0 calc(100% - 20px));
}

.image-frame::before {
  content: "";
  position: absolute;
  inset: 0;
  background: repeating-linear-gradient(135deg, rgba(57, 255, 20, 0.05) 0 2px, transparent 2px 12px);
}

.image-frame--light {
  background: #ffffff;
  border-color: var(--color-border-light);
}

/* ---------- 数据块 ---------- */
.stat {
  position: relative;
  display: grid;
  gap: 0.25rem;
  padding: var(--space-3);
  background: var(--color-bg-deep);
  border-left: 3px solid var(--color-primary);
}

.stat::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: linear-gradient(90deg, rgba(57, 255, 20, 0.5), transparent 45%);
}

.stat--accent {
  border-left-color: var(--color-secondary);
}

.stat--accent::before {
  background: linear-gradient(90deg, rgba(255, 107, 53, 0.5), transparent 45%);
}

.stat__value {
  font-family: var(--font-mono);
  font-size: 2rem;
  font-weight: 700;
  line-height: 1.1;
  color: var(--color-text-dark);
}

.stat__value em {
  font-style: normal;
  color: var(--color-primary);
}

.stat--accent .stat__value em {
  color: var(--color-secondary);
}

.stat__label {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--color-text-dim);
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.section--light .stat {
  background: #ffffff;
}

/* ---------- 刻度装饰条 ---------- */
.scale-bar {
  display: block;
  width: 100%;
  height: 0.625rem;
  background: repeating-linear-gradient(90deg, var(--color-text-dim) 0 1px, transparent 1px 10px);
  opacity: 0.7;
}

.scale-bar--accent {
  background: repeating-linear-gradient(90deg, var(--color-primary) 0 2px, transparent 2px 10px);
}

.scale-bar--wide {
  height: 1rem;
}

/* ---------- 斜切色带 ---------- */
.slant-band {
  display: block;
  min-height: 3rem;
  background: linear-gradient(115deg, transparent 32%, rgba(57, 255, 20, 0.16) 32%, rgba(0, 229, 255, 0.1) 38%, transparent 38%);
  pointer-events: none;
}

/* ---------- 正文 / 注释 ---------- */
.prose {
  font-size: 1rem;
  line-height: 1.85;
  color: var(--color-text-dark);
  max-width: 65ch;
}

.prose h2 {
  font-size: 1.75rem;
  margin-top: var(--space-4);
  margin-bottom: var(--space-2);
}

.prose p,
.prose ul,
.prose ol {
  margin-bottom: var(--space-2);
}

.prose a {
  color: var(--color-accent);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.prose ul {
  list-style: disc;
  padding-left: 1.5rem;
}

.note-text {
  padding-left: var(--space-2);
  border-left: 2px solid rgba(57, 255, 20, 0.35);
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--color-text-dim);
  letter-spacing: 0.05em;
  line-height: 1.7;
}

.section--light .note-text {
  color: rgba(10, 25, 47, 0.65);
  border-left-color: var(--color-secondary);
}

/* ---------- 内页首屏 ---------- */
.page-hero {
  padding-top: calc(var(--header-height) + var(--space-5));
  padding-bottom: var(--space-4);
  background: var(--color-bg);
  border-bottom: 2px solid rgba(57, 255, 20, 0.15);
}

.page-hero--light {
  background: var(--color-bg-light);
  color: var(--color-text-light);
  border-bottom-color: rgba(57, 255, 20, 0.4);
}

.page-hero--light .page-hero__lead {
  color: rgba(10, 25, 47, 0.68);
}

.page-hero__title {
  font-size: clamp(2.5rem, 8vw, 5rem);
  line-height: 1.02;
  letter-spacing: 0.01em;
}

.page-hero__lead {
  margin-top: var(--space-2);
  max-width: 42ch;
  color: var(--color-text-dim);
  font-size: 1.0625rem;
  line-height: 1.7;
}

/* ---------- 显现交互 ---------- */
.js-reveal [data-reveal] {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity 0.3s var(--ease),
    transform 0.3s var(--ease);
}

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

/* ---------- 响应式调整 ---------- */
@media (min-width: 768px) {
  .site-footer__inner {
    grid-template-columns: 1.2fr 2fr 1.4fr;
  }
}

@media (max-width: 767px) {
  .site-footer__inner {
    gap: var(--space-3);
    padding-top: var(--space-4);
  }

  .site-footer__nav {
    grid-template-columns: 1fr 1fr;
  }

  .site-footer__meta-inner {
    flex-direction: column;
    align-items: flex-start;
  }
}

@media (max-width: 479px) {
  .site-brand__text small {
    display: none;
  }

  .site-footer__nav {
    grid-template-columns: 1fr;
  }
}

@media (prefers-reduced-motion: no-preference) {
  html {
    scroll-behavior: smooth;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }

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