/* =================================================
   浩瀚观赛 · 全站共享样式表
   角色：Reset / 变量 / 中文排版 / 头部 / 页脚 / 通用组件
   ================================================= */

/* ---------- 1. Reset ---------- */
*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

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

body {
  min-height: 100vh;
  font-family: var(--font-body);
  font-size: 1rem;
  line-height: 1.8;
  color: var(--color-primary);
  background: var(--color-surface);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

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

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

a {
  color: var(--color-primary);
  text-underline-offset: 3px;
}

ul,
ol {
  list-style: none;
}

h1,
h2,
h3,
h4,
h5,
h6 {
  font-family: var(--font-heading);
  font-weight: 900;
  line-height: 1.2;
  text-wrap: balance;
}

p {
  text-wrap: pretty;
}

/* ---------- 2. 变量 ---------- */
:root {
  --color-primary: #0B1B3A;
  --color-accent: #C3272B;
  --color-surface: #F5F5F0;
  --color-gold: #E9B872;
  --color-teal: #1A4C54;
  --color-purple: #3E2A5A;
  --color-green: #1F3D2B;
  --color-gray: #E6E6E6;
  --color-text-muted: #6b7280;

  --font-heading: "PingFang SC", "Microsoft YaHei", "Heiti SC", "Noto Sans CJK SC", sans-serif;
  --font-body: "Songti SC", "Noto Serif CJK SC", "SimSun", "Source Han Serif SC", serif;
  --font-index: "PingFang SC", "Microsoft YaHei", "Noto Sans CJK SC", sans-serif;

  --container-width: 1240px;
  --radius: 12px;
}

/* ---------- 3. 容器与正文骨架 ---------- */
.container,
.wrap {
  max-width: var(--container-width);
  margin-inline: auto;
  padding-inline: 2rem;
}

.page-shell {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 300px;
  grid-template-areas: "main aside";
  gap: 2.5rem;
  padding: 2.5rem 0;
}

.page-shell--extends {
  grid-template-columns: minmax(0, 1fr) 280px 220px;
  grid-template-areas: "main aside extras";
}

.page-main {
  grid-area: main;
  min-width: 0;
}

.page-aside {
  grid-area: aside;
}

.page-extras {
  grid-area: extras;
}

.section {
  padding: 3.5rem 0;
}

.section__kicker {
  font-family: var(--font-index);
  font-size: 0.75rem;
  font-weight: 500;
  letter-spacing: 0.3em;
  text-transform: uppercase;
  color: var(--color-accent);
  margin-bottom: 0.5rem;
}

.section__title {
  font-size: clamp(2rem, 4vw, 3.25rem);
  margin-bottom: 1.5rem;
}

/* ---------- 4. 排版工具 ---------- */
.text-gold { color: var(--color-gold); }
.text-accent { color: var(--color-accent); }
.text-teal { color: var(--color-teal); }
.text-muted { color: var(--color-text-muted); }
.text-center { text-align: center; }

/* ---------- 5. 跳过链接 ---------- */
.skip-link {
  position: fixed;
  top: -100%;
  left: 1rem;
  z-index: 9999;
  padding: 0.65rem 1.25rem;
  background: var(--color-accent);
  color: var(--color-surface);
  font-family: var(--font-index);
  font-size: 0.9rem;
  text-decoration: none;
  border-radius: 0 0 8px 8px;
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.3);
  transition: top 0.2s ease;
}

.skip-link:focus {
  top: 0;
}

/* ---------- 6. 头部 ---------- */
.site-header {
  position: relative;
  background: var(--color-primary);
  color: var(--color-surface);
}

.site-header::before {
  content: "";
  display: block;
  height: 6px;
  background: repeating-linear-gradient(
    -45deg,
    var(--color-gold) 0 8px,
    var(--color-accent) 8px 16px,
    var(--color-teal) 16px 24px,
    var(--color-purple) 24px 32px
  );
}

.site-header__inner {
  max-width: var(--container-width);
  margin-inline: auto;
  padding: 1.25rem 2rem 0;
}

.site-header__masthead {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  padding-bottom: 0.75rem;
}

.site-header__nav-toggle {
  display: none;
  position: absolute;
  left: 0;
  top: 50%;
  transform: translateY(-50%);
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 0.5rem 0.6rem;
  background: transparent;
  border: 1px solid var(--color-teal);
  border-radius: 6px;
  cursor: pointer;
  transition: background-color 0.25s;
}

.site-header__nav-toggle:hover {
  background: rgba(255, 255, 255, 0.04);
}

.site-header__nav-toggle-bar {
  display: block;
  width: 22px;
  height: 2px;
  margin: 3px 0;
  background: var(--color-surface);
  border-radius: 2px;
  transition: transform 0.3s ease, opacity 0.3s ease;
}

.site-header__nav-toggle.is-active .site-header__nav-toggle-bar:nth-child(1) {
  transform: translateY(8px) rotate(45deg);
}

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

.site-header__nav-toggle.is-active .site-header__nav-toggle-bar:nth-child(3) {
  transform: translateY(-8px) rotate(-45deg);
}

.site-header__brand {
  display: inline-flex;
  align-items: center;
  gap: 0.75rem;
  color: var(--color-surface);
  text-decoration: none;
}

.site-header__brand-mark {
  position: relative;
  width: 46px;
  height: 46px;
  flex: 0 0 auto;
}

.site-header__brand-mark::before {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 28px;
  height: 28px;
  background: var(--color-surface);
  clip-path: polygon(0 100%, 50% 10%, 100% 100%);
}

.site-header__brand-mark::after {
  content: "";
  position: absolute;
  right: 0;
  top: 0;
  width: 20px;
  height: 20px;
  border-radius: 50%;
  background: var(--color-accent);
  border: 2px solid var(--color-gold);
}

.site-header__brand-copy {
  display: flex;
  flex-direction: column;
}

.site-header__brand-name {
  font-family: var(--font-heading);
  font-size: 1.65rem;
  font-weight: 900;
  line-height: 1.1;
  letter-spacing: 0.08em;
}

.site-header__brand-tagline {
  font-family: var(--font-index);
  font-size: 0.68rem;
  letter-spacing: 0.24em;
  color: var(--color-gold);
  margin-top: 0.25rem;
}

.site-header__edition {
  position: absolute;
  right: 0;
  top: 50%;
  transform: translateY(-50%);
  font-family: var(--font-index);
  font-size: 0.72rem;
  letter-spacing: 0.16em;
  color: var(--color-gold);
  border: 1px solid var(--color-teal);
  border-radius: 999px;
  padding: 0.3rem 0.85rem;
  white-space: nowrap;
}

.site-nav {
  border-top: 1px solid rgba(255, 255, 255, 0.08);
}

.site-nav__list {
  display: flex;
  justify-content: center;
  gap: 0.25rem;
}

.site-nav__item {
  position: relative;
}

.site-nav__link {
  position: relative;
  display: block;
  padding: 0.85rem 1.2rem;
  color: rgba(255, 255, 255, 0.8);
  font-family: var(--font-index);
  font-size: 0.925rem;
  font-weight: 500;
  letter-spacing: 0.05em;
  text-decoration: none;
  transition: color 0.2s ease, background-color 0.2s ease;
}

.site-nav__link:hover {
  color: var(--color-gold);
  background: rgba(255, 255, 255, 0.04);
}

.site-nav__link[aria-current="page"] {
  color: var(--color-gold);
  box-shadow: inset 0 -3px 0 var(--color-accent);
}

/* ---------- 7. 页脚 ---------- */
.site-footer {
  position: relative;
  margin-top: 5rem;
  background: var(--color-primary);
  color: var(--color-surface);
}

.site-footer::before {
  content: "";
  display: block;
  height: 6px;
  background: repeating-linear-gradient(
    -45deg,
    var(--color-gold) 0 8px,
    var(--color-accent) 8px 16px,
    var(--color-teal) 16px 24px,
    var(--color-purple) 24px 32px
  );
}

.site-footer__container {
  max-width: var(--container-width);
  margin-inline: auto;
  padding: 3rem 2rem 1.75rem;
}

.site-footer__top {
  display: grid;
  grid-template-columns: 1.4fr 0.8fr 0.8fr 1.2fr;
  gap: 2.5rem;
}

.site-footer__brand-group {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
}

.site-footer__brand-name {
  font-family: var(--font-heading);
  font-size: 1.6rem;
  font-weight: 900;
  letter-spacing: 0.05em;
}

.site-footer__tagline {
  margin-top: 0.75rem;
  font-size: 0.9rem;
  color: rgba(255, 255, 255, 0.7);
  max-width: 28ch;
}

.site-footer__heading {
  font-family: var(--font-index);
  font-size: 0.72rem;
  font-weight: 500;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--color-gold);
  margin-bottom: 1rem;
  padding-bottom: 0.5rem;
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.site-footer__links li,
.site-footer__contact p {
  margin-bottom: 0.55rem;
}

.site-footer__links a {
  color: rgba(255, 255, 255, 0.7);
  text-decoration: none;
  font-size: 0.9rem;
  transition: color 0.2s ease;
}

.site-footer__links a:hover {
  color: var(--color-gold);
}

.site-footer__contact {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
}

.site-footer__contact p {
  font-size: 0.9rem;
  color: rgba(255, 255, 255, 0.7);
  word-break: break-all;
}

.site-footer__bottom {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: center;
  gap: 0.75rem;
  margin-top: 2.5rem;
  padding-top: 1.5rem;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  font-size: 0.8rem;
  color: rgba(255, 255, 255, 0.55);
}

/* ---------- 8. 按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.8rem 1.8rem;
  border: 2px solid transparent;
  border-radius: 4px;
  font-family: var(--font-heading);
  font-size: 0.875rem;
  font-weight: 700;
  line-height: 1.2;
  text-decoration: none;
  cursor: pointer;
  transition: background-color 0.2s ease, border-color 0.2s ease, color 0.2s ease, transform 0.2s ease;
}

.btn:active {
  transform: translateY(1px);
}

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

.btn--primary:hover {
  background: #a01f23;
}

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

.btn--outline:hover {
  background: var(--color-accent);
  color: var(--color-surface);
}

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

.btn--gold:hover {
  background: #d9a75f;
}

/* ---------- 9. 面包屑 ---------- */
.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.5rem;
  padding: 1.25rem 0;
  font-size: 0.875rem;
}

.breadcrumb a {
  color: var(--color-teal);
  text-decoration: none;
}

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

.breadcrumb__sep {
  color: var(--color-gray);
}

.breadcrumb__current {
  color: var(--color-primary);
}

/* ---------- 10. 网格与卡片 ---------- */
.grid {
  display: grid;
  gap: 2rem;
}

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

.grid--3 {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.card {
  background: var(--color-surface);
  border: 1px solid var(--color-gray);
  border-radius: var(--radius);
  padding: 1.75rem;
  box-shadow: 0 4px 16px rgba(11, 27, 58, 0.06);
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.card:hover {
  transform: translateY(-4px);
  box-shadow: 0 12px 28px rgba(11, 27, 58, 0.1);
}

.card--dark {
  background: var(--color-primary);
  color: var(--color-surface);
}

/* ---------- 11. 目录组件 ---------- */
.toc {
  border-left: 4px solid var(--color-accent);
  background: var(--color-surface);
  padding: 2rem 1.5rem;
  box-shadow: 0 2px 8px rgba(11, 27, 58, 0.08);
}

.toc__title {
  font-family: var(--font-heading);
  font-size: 0.85rem;
  font-weight: 900;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--color-accent);
  margin-bottom: 1.25rem;
}

.toc__list {
  counter-reset: toc-index;
}

.toc__item {
  margin-bottom: 0.6rem;
}

.toc__link {
  display: inline-flex;
  align-items: baseline;
  gap: 0.6rem;
  color: var(--color-primary);
  text-decoration: none;
  font-size: 0.9375rem;
  transition: color 0.2s ease;
}

.toc__link::before {
  counter-increment: toc-index;
  content: counter(toc-index) ".";
  font-family: var(--font-index);
  font-size: 0.72rem;
  color: var(--color-accent);
}

.toc__link:hover {
  color: var(--color-accent);
}

/* ---------- 12. 筛选组件 ---------- */
.filter-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  padding: 1rem 0 1.5rem;
}

.filter-bar__btn {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  padding: 0.5rem 1.25rem;
  border: 1px solid var(--color-teal);
  border-radius: 999px;
  background: transparent;
  color: var(--color-primary);
  font-family: var(--font-index);
  font-size: 0.85rem;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.25s ease;
}

.filter-bar__btn:hover {
  border-color: var(--color-accent);
  color: var(--color-accent);
}

.filter-bar__btn.is-active,
.filter-bar__btn[aria-pressed="true"] {
  background: var(--color-accent);
  border-color: var(--color-accent);
  color: var(--color-surface);
}

.is-hidden {
  display: none !important;
}

[hidden] {
  display: none !important;
}

/* ---------- 13. 媒体占位框架 ---------- */
.media-frame {
  position: relative;
  overflow: hidden;
  background: var(--color-teal);
  border-radius: 8px;
}

.media-frame::before {
  content: "";
  display: block;
  padding-top: 56.25%;
}

.media-frame--square::before {
  padding-top: 100%;
}

.media-frame--wide::before {
  padding-top: 50%;
}

.media-frame--tall::before {
  padding-top: 120%;
}

.media-frame__placeholder {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  background: linear-gradient(135deg, var(--color-teal) 0%, var(--color-primary) 100%);
  color: var(--color-surface);
  font-family: var(--font-index);
  font-size: 0.8rem;
  letter-spacing: 0.12em;
}

/* ---------- 14. 滚动渐显 ---------- */
.js [data-reveal] {
  opacity: 0;
  transform: translateY(22px);
  transition: opacity 0.6s ease, transform 0.6s ease;
  will-change: opacity, transform;
}

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

/* ---------- 15. 焦点可见性 ---------- */
:focus-visible {
  outline: 3px solid var(--color-gold);
  outline-offset: 2px;
}

/* ---------- 16. 响应式 ---------- */
@media (max-width: 1023px) {
  .page-shell,
  .page-shell--extends {
    grid-template-columns: 1fr;
    grid-template-areas: "main" "aside" "extras";
  }

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

  .site-header__edition {
    display: none;
  }
}

@media (max-width: 767px) {
  .container,
  .wrap {
    padding-inline: 1.25rem;
  }

  .site-header__inner {
    padding: 1rem 1.25rem 0;
  }

  .site-header__nav-toggle {
    display: flex;
  }

  .site-header__masthead {
    padding-bottom: 0.5rem;
  }

  .site-header__brand-name {
    font-size: 1.35rem;
  }

  .site-header__brand-mark {
    width: 36px;
    height: 36px;
  }

  .site-header__brand-tagline {
    letter-spacing: 0.12em;
    font-size: 0.62rem;
  }

  .site-nav {
    display: none;
    border-top: none;
    background: rgba(255, 255, 255, 0.03);
    margin: 0 -1.25rem;
    padding: 0 1.25rem;
  }

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

  .site-nav__list {
    flex-direction: column;
    gap: 0;
  }

  .site-nav__link {
    padding: 0.8rem 0.25rem;
    border-bottom: 1px solid rgba(255, 255, 255, 0.06);
  }

  .site-nav__link[aria-current="page"] {
    box-shadow: none;
  }

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

  .site-footer__container {
    padding: 2.5rem 1.25rem 1.5rem;
  }

  .site-footer__top {
    grid-template-columns: 1fr;
    gap: 2rem;
  }

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

/* ---------- 17. 偏好减弱动效 ---------- */
@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;
    scroll-behavior: auto !important;
  }

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