/* AB 娱乐体育 共享 Site Kit */

/* ===== 设计变量 ===== */
:root {
  --color-snow: #F7F5F0;
  --color-navy: #1F3A5F;
  --color-red: #C2372D;
  --color-gold: #D4AF37;
  --color-stone: #4A4A4A;
  --color-sky: #89C6D0;
  --color-snowblue: #A8C4DC;
  --color-dark: #141414;
  --color-fog: #EDE8E0;
  --color-pine: #5A7D6E;

  --font-heading: "Noto Sans SC", "Source Han Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
  --font-body: "Noto Serif SC", "Source Han Serif SC", "Songti SC", STSong, serif;
  --font-data: "Roboto Mono", "SFMono-Regular", Consolas, monospace;

  --container: 76rem;
  --space-section: clamp(3rem, 7vw, 6rem);
  --radius: 1rem;
  --shadow-sm: 0 1px 3px rgba(20, 20, 20, 0.08);
  --shadow-md: 0 10px 24px rgba(20, 20, 20, 0.12);

  color-scheme: light;
}

/* ===== 基础重置 ===== */
*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
}

body {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  font-family: var(--font-body);
  font-size: 1rem;
  line-height: 1.75;
  background: var(--color-snow);
  color: var(--color-stone);
}

body,
h1,
h2,
h3,
h4,
p,
ul,
ol,
figure {
  margin: 0;
}

ul,
ol {
  padding: 0;
}

a {
  color: var(--color-navy);
  text-decoration: none;
}

a:hover {
  color: var(--color-red);
}

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

button {
  font: inherit;
}

address {
  font-style: normal;
}

::selection {
  background: var(--color-red);
  color: var(--color-snow);
}

h1,
h2,
h3,
h4 {
  font-family: var(--font-heading);
  font-weight: 900;
  line-height: 1.2;
  color: var(--color-navy);
}

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

/* ===== 通用布局 ===== */
.container {
  max-width: var(--container);
  margin-inline: auto;
  padding-inline: 1.5rem;
}

.section {
  padding-block: var(--space-section);
}

.section--fog {
  background: var(--color-fog);
}

.section--dark {
  background: var(--color-navy);
  color: var(--color-snow);
}

.section--dark .section-title {
  color: var(--color-snow);
}

.section--dark .section-intro {
  color: rgba(255, 255, 255, 0.78);
}

.section-title {
  font-size: clamp(2rem, 4vw, 2.75rem);
  margin-bottom: 0.75rem;
}

.section-intro {
  max-width: 60ch;
  font-size: 1.125rem;
  color: var(--color-stone);
}

.prose {
  max-width: 72ch;
  font-size: 1.0625rem;
}

.prose p {
  margin-bottom: 1.25rem;
}

.prose h2 {
  margin-top: 2.5rem;
}

.prose ul,
.prose ol {
  margin: 1rem 0 1.25rem 1.5rem;
}

.prose li {
  margin-bottom: 0.5rem;
}

/* ===== 网格 ===== */
.grid {
  display: grid;
  gap: 1.5rem;
}

.grid--12 {
  grid-template-columns: repeat(12, 1fr);
}

.grid__item {
  min-width: 0;
}

/* ===== 按钮 ===== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.875rem 1.5rem;
  border: 2px solid transparent;
  border-radius: 0.75rem;
  background: transparent;
  font-family: var(--font-heading);
  font-weight: 900;
  font-size: 0.9375rem;
  line-height: 1;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  cursor: pointer;
  text-decoration: none;
  transition:
    transform 180ms ease,
    box-shadow 180ms ease,
    background 180ms ease,
    color 180ms ease,
    border-color 180ms ease;
}

.btn--primary {
  background: var(--color-red);
  color: var(--color-snow);
  box-shadow: 0 5px 0 #7D1D16;
}

.btn--primary:hover {
  background: #A42C23;
  color: var(--color-snow);
  box-shadow: 0 3px 0 #7D1D16;
  transform: translateY(2px);
}

.btn--gold {
  background: var(--color-gold);
  color: var(--color-dark);
  box-shadow: 0 5px 0 #9C7E22;
}

.btn--gold:hover {
  background: #C2A02E;
  color: var(--color-dark);
  box-shadow: 0 3px 0 #9C7E22;
  transform: translateY(2px);
}

.btn--outline {
  border-color: var(--color-navy);
  color: var(--color-navy);
}

.btn--outline:hover {
  background: var(--color-navy);
  color: var(--color-snow);
  box-shadow: 0 5px 0 var(--color-dark);
  transform: translateY(-2px);
}

.btn:focus-visible {
  outline: 3px solid var(--color-gold);
  outline-offset: 3px;
}

/* ===== 标签 ===== */
.tag {
  display: inline-flex;
  align-items: center;
  gap: 0.25rem;
  padding: 0.25rem 0.75rem;
  border-radius: 999px;
  font-family: var(--font-heading);
  font-size: 0.75rem;
  font-weight: 900;
  letter-spacing: 0.04em;
  background: var(--color-fog);
  color: var(--color-navy);
}

.tag--red {
  background: rgba(194, 55, 45, 0.12);
  color: var(--color-red);
}

.tag--gold {
  background: rgba(212, 175, 55, 0.16);
  color: #8A6C17;
}

.tag--blue {
  background: rgba(137, 198, 208, 0.2);
  color: #1F5D6B;
}

.tag--green {
  background: rgba(90, 125, 110, 0.16);
  color: var(--color-pine);
}

/* ===== 卡片 ===== */
.card {
  background: var(--color-snow);
  border: 1px solid rgba(31, 58, 95, 0.08);
  border-radius: var(--radius);
  padding: 1.5rem;
  box-shadow: var(--shadow-sm);
}

.card--red {
  border-top: 4px solid var(--color-red);
}

.card--gold {
  border-top: 4px solid var(--color-gold);
}

.card__title {
  font-size: 1.25rem;
  margin-bottom: 0.5rem;
}

.card__meta {
  font-family: var(--font-data);
  font-size: 0.875rem;
  color: rgba(31, 58, 95, 0.75);
  margin-bottom: 0.5rem;
}

.card__body {
  color: var(--color-stone);
}

/* ===== Bento ===== */
.bento {
  display: grid;
  grid-template-columns: repeat(12, 1fr);
  gap: 1.25rem;
}

.bento__item {
  grid-column: span 4;
  min-height: 12rem;
  padding: 1.5rem;
  background: var(--color-snow);
  border: 1px solid rgba(31, 58, 95, 0.08);
  border-radius: 1.5rem 1rem;
  box-shadow: var(--shadow-sm);
  position: relative;
}

.bento__item--wide {
  grid-column: span 8;
}

.bento__item--full {
  grid-column: 1 / -1;
}

.bento__item--center {
  grid-column: 3 / 11;
}

/* ===== 媒体占位 ===== */
.media-frame {
  position: relative;
  display: block;
  overflow: hidden;
  aspect-ratio: 4 / 3;
  background: linear-gradient(135deg, var(--color-snowblue), var(--color-fog));
  border-radius: var(--radius);
}

.media-frame--wide {
  aspect-ratio: 16 / 6;
}

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

.media-frame::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 4px;
  background: var(--color-gold);
  opacity: 0.85;
}

.media-frame__img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.media-frame__label {
  position: absolute;
  left: 1rem;
  bottom: 1rem;
  padding: 0.375rem 0.75rem;
  background: var(--color-navy);
  color: var(--color-snow);
  border-radius: 999px;
  font-family: var(--font-heading);
  font-size: 0.8125rem;
  font-weight: 900;
  z-index: 1;
}

/* ===== 框景首屏 ===== */
.frame-screen {
  position: relative;
  padding: clamp(1.5rem, 5vw, 3rem);
  background: var(--color-snow);
  border: 2px solid var(--color-navy);
  border-radius: 1.5rem;
  box-shadow: var(--shadow-md);
}

.frame-screen::before,
.frame-screen::after {
  content: "";
  position: absolute;
  height: 4px;
  width: 4.5rem;
}

.frame-screen::before {
  top: -2px;
  left: 3rem;
  background: var(--color-red);
}

.frame-screen::after {
  bottom: -2px;
  right: 3rem;
  background: var(--color-gold);
}

.frame-screen__content {
  position: relative;
  z-index: 1;
}

/* ===== 面包屑 ===== */
.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  list-style: none;
  padding: 1rem 0;
  font-family: var(--font-heading);
  font-size: 0.875rem;
}

.breadcrumb li {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.breadcrumb li + li::before {
  content: "/";
  color: var(--color-gold);
  font-weight: 900;
}

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

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

.breadcrumb [aria-current="page"] {
  color: var(--color-red);
  font-weight: 900;
}

/* ===== 数据 ===== */
.data-number {
  font-family: var(--font-data);
  font-size: 2.5rem;
  font-weight: 700;
  line-height: 1;
  color: var(--color-red);
}

.data-label {
  font-family: var(--font-heading);
  font-size: 0.875rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  color: var(--color-navy);
}

/* ===== 时间线 ===== */
.timeline {
  list-style: none;
  position: relative;
  margin: 2rem 0;
  padding: 0;
}

.timeline__item {
  position: relative;
  margin: 0 0 2rem 1rem;
  padding-left: 2rem;
  border-left: 2px solid var(--color-fog);
}

.timeline__item:last-child {
  margin-bottom: 0;
}

.timeline__dot {
  position: absolute;
  left: -1.15rem;
  top: 0.25rem;
  width: 1rem;
  height: 1rem;
  border-radius: 50%;
  background: var(--color-gold);
  box-shadow: 0 0 0 4px var(--color-snow);
}

.timeline__date {
  display: block;
  font-family: var(--font-data);
  font-weight: 700;
  color: var(--color-red);
}

.timeline__title {
  font-family: var(--font-heading);
  font-weight: 900;
  color: var(--color-navy);
}

.timeline__body {
  color: var(--color-stone);
  margin-top: 0.25rem;
}

/* ===== 技能路径 ===== */
.path {
  list-style: none;
  display: grid;
  gap: 1.25rem;
  padding: 0;
}

.path__step {
  position: relative;
  padding: 1.5rem 1.75rem;
  background: var(--color-snow);
  border-left: 4px solid var(--color-gold);
  border-radius: 0 1rem 1rem 0;
  box-shadow: var(--shadow-sm);
}

.path__step::before {
  content: attr(data-step);
  position: absolute;
  top: -0.75rem;
  left: 1rem;
  background: var(--color-red);
  color: var(--color-snow);
  font-family: var(--font-data);
  font-size: 0.875rem;
  font-weight: 700;
  padding: 0.25rem 0.5rem;
  border-radius: 0.25rem;
}

.path__step-title {
  font-family: var(--font-heading);
  font-weight: 900;
  color: var(--color-navy);
  margin-bottom: 0.25rem;
}

.path__step-body {
  color: var(--color-stone);
}

/* ===== 头部 ===== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background:
    radial-gradient(circle at 82% 18%, rgba(212, 175, 55, 0.14), transparent 34%),
    linear-gradient(115deg, var(--color-navy) 0%, #11283F 100%);
  color: var(--color-snow);
  box-shadow: 0 4px 16px rgba(20, 20, 20, 0.18);
}

.site-header::before {
  content: "";
  display: block;
  height: 4px;
  background: linear-gradient(90deg, var(--color-gold) 0%, var(--color-gold) 30%, var(--color-red) 30%, var(--color-red) 60%, var(--color-snow) 60%, var(--color-snow) 100%);
}

.site-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 0.75rem;
  max-width: var(--container);
  margin-inline: auto;
  padding: 0.75rem 1.5rem;
}

.skip-link {
  position: absolute;
  top: -100%;
  left: 1.25rem;
  z-index: 1000;
  background: var(--color-gold);
  color: var(--color-dark);
  padding: 0.75rem 1.25rem;
  border-radius: 0 0 0.75rem 0.75rem;
  font-weight: 700;
  text-decoration: none;
}

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

.skip-link:focus-visible {
  outline: 3px solid var(--color-red);
  outline-offset: 2px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.75rem;
  flex: 0 0 auto;
  color: var(--color-snow);
  text-decoration: none;
  line-height: 1.2;
}

.brand:hover {
  color: var(--color-snow);
}

.brand__mark {
  display: grid;
  place-items: center;
  width: 2.75rem;
  height: 2.75rem;
  background: var(--color-red);
  color: var(--color-snow);
  font-family: var(--font-heading);
  font-weight: 900;
  font-size: 1.125rem;
  clip-path: polygon(0 0, 100% 0, calc(100% - 0.625rem) 100%, 0 100%);
  transition: transform 180ms ease;
}

.brand:hover .brand__mark {
  transform: translateX(2px);
}

.brand__text {
  font-family: var(--font-heading);
  font-size: 1.125rem;
  font-weight: 900;
  letter-spacing: 0.02em;
}

.site-header__tagline {
  display: block;
  margin-top: 0.15rem;
  font-size: 0.6875rem;
  font-weight: 700;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--color-gold);
}

.site-nav {
  flex: 0 1 auto;
  display: flex;
  align-items: center;
  justify-content: flex-end;
}

.site-nav__list {
  display: flex;
  align-items: center;
  gap: 1.5rem;
  list-style: none;
  padding: 0;
  margin: 0;
}

.site-nav__link {
  display: inline-block;
  position: relative;
  padding: 0.5rem 0;
  border-bottom: 3px solid transparent;
  color: rgba(255, 255, 255, 0.85);
  font-family: var(--font-heading);
  font-weight: 900;
  font-size: 0.8125rem;
  line-height: 1;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  text-decoration: none;
  transition: color 180ms ease, border-color 180ms ease;
}

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

.site-nav__link::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: -3px;
  height: 3px;
  background: var(--color-gold);
  transform: scaleX(0);
  transform-origin: right;
  transition: transform 180ms ease;
}

.site-nav__link:hover::after,
.site-nav__link:focus-visible::after {
  transform: scaleX(1);
  transform-origin: left;
}

.site-nav__link[aria-current="page"] {
  color: var(--color-gold);
  border-bottom-color: var(--color-red);
}

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

.nav-toggle {
  display: none;
}

.back-to-top {
  position: fixed;
  right: 1.5rem;
  bottom: 1.5rem;
  z-index: 200;
  width: 3.25rem;
  height: 3.25rem;
  border: none;
  border-radius: 0.75rem;
  background: var(--color-red);
  color: var(--color-snow);
  font-size: 1.25rem;
  font-weight: 900;
  cursor: pointer;
  box-shadow: var(--shadow-md);
  opacity: 0;
  visibility: hidden;
  transform: translateY(0.75rem);
  transition:
    opacity 180ms ease,
    transform 180ms ease,
    visibility 180ms ease,
    background 180ms ease;
}

.back-to-top.is-visible {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.back-to-top:hover {
  background: var(--color-navy);
}

.back-to-top:focus-visible {
  outline: 3px solid var(--color-gold);
  outline-offset: 2px;
}

/* ===== 页脚 ===== */
.site-footer {
  background: var(--color-navy);
  color: rgba(255, 255, 255, 0.82);
  border-top: 4px solid var(--color-gold);
}

.site-footer__top {
  max-width: var(--container);
  margin-inline: auto;
  display: grid;
  grid-template-columns: 1.5fr 0.8fr 1.1fr;
  gap: 2.5rem;
  padding: 3rem 1.5rem 2.5rem;
}

.site-footer__col {
  min-width: 0;
}

.site-footer__col--brand {
  max-width: 36rem;
}

.site-footer__col--links,
.site-footer__col--contact {
  display: flex;
  flex-direction: column;
}

.site-footer__trust {
  max-width: 36ch;
  margin-top: 1rem;
  font-size: 0.9375rem;
  color: rgba(255, 255, 255, 0.65);
}

.site-footer__heading {
  font-family: var(--font-heading);
  font-size: 0.875rem;
  font-weight: 900;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--color-gold);
  margin-bottom: 1.25rem;
}

.site-footer__links,
.site-footer__contact {
  list-style: none;
  margin: 0;
  padding: 0;
}

.site-footer__links li {
  margin-bottom: 0.75rem;
}

.site-footer__links a {
  color: rgba(255, 255, 255, 0.85);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color 180ms ease, border-color 180ms ease;
}

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

.site-footer__contact-item {
  margin-bottom: 0.5rem;
  font-family: var(--font-data);
  font-size: 0.9375rem;
  color: rgba(255, 255, 255, 0.9);
}

.site-footer__address {
  font-style: normal;
  color: rgba(255, 255, 255, 0.7);
}

.site-footer__bottom {
  background: var(--color-dark);
}

.site-footer__bottom-inner {
  max-width: var(--container);
  margin-inline: auto;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem 1.5rem;
  padding: 1.25rem 1.5rem;
  font-family: var(--font-heading);
  font-size: 0.8125rem;
  color: rgba(255, 255, 255, 0.65);
}

.site-footer__copyright {
  margin: 0;
}

.site-footer__icp {
  color: rgba(255, 255, 255, 0.75);
  letter-spacing: 0.06em;
}

/* ===== 响应式：平板/手机 ===== */
@media (max-width: 50rem) {
  .nav-toggle {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 3rem;
    height: 3rem;
    padding: 0;
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: 0.75rem;
    background: transparent;
    color: var(--color-snow);
    cursor: pointer;
    position: relative;
  }

  .nav-toggle__bars,
  .nav-toggle__bars::before,
  .nav-toggle__bars::after {
    display: block;
    content: "";
    width: 1.25rem;
    height: 2px;
    background: var(--color-snow);
    border-radius: 2px;
    transition: transform 180ms ease, opacity 180ms ease;
  }

  .nav-toggle__bars {
    position: relative;
  }

  .nav-toggle__bars::before {
    position: absolute;
    top: -0.4rem;
    left: 0;
  }

  .nav-toggle__bars::after {
    position: absolute;
    top: 0.4rem;
    left: 0;
  }

  .nav-toggle[aria-expanded="true"] .nav-toggle__bars {
    background: transparent;
  }

  .nav-toggle[aria-expanded="true"] .nav-toggle__bars::before {
    transform: translateY(0.4rem) rotate(45deg);
  }

  .nav-toggle[aria-expanded="true"] .nav-toggle__bars::after {
    transform: translateY(-0.4rem) rotate(-45deg);
  }

  .site-nav {
    order: 3;
    flex: 0 0 100%;
    display: flex;
    flex-direction: column;
    align-items: stretch;
    max-height: 0;
    overflow: hidden;
    opacity: 0;
    visibility: hidden;
    transition:
      max-height 220ms ease,
      opacity 160ms ease,
      visibility 160ms ease;
  }

  .site-nav[data-open] {
    max-height: 26rem;
    opacity: 1;
    visibility: visible;
  }

  .site-nav__list {
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: 0.5rem 0 1rem;
  }

  .site-nav__link {
    padding: 0.875rem 0.5rem;
    border-bottom: 1px solid rgba(255, 255, 255, 0.12);
    text-transform: none;
    letter-spacing: 0.02em;
    font-size: 0.9375rem;
  }

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

  .site-nav__link[aria-current="page"] {
    color: var(--color-gold);
    border-left: 4px solid var(--color-gold);
    border-bottom-color: rgba(255, 255, 255, 0.12);
    background: rgba(212, 175, 55, 0.08);
  }

  .site-footer__top {
    grid-template-columns: 1.5fr 1fr;
    gap: 2rem;
  }

  .site-footer__col--brand {
    grid-column: 1 / -1;
  }
}

/* ===== 响应式：手机 ===== */
@media (max-width: 40rem) {
  .container,
  .site-header__inner,
  .site-footer__bottom-inner {
    padding-inline: 1.25rem;
  }

  .site-footer__top {
    grid-template-columns: 1fr;
    gap: 1.75rem;
    padding-top: 2.5rem;
    padding-bottom: 2rem;
  }

  .site-footer__col--brand {
    grid-column: auto;
  }

  .brand__text {
    font-size: 1rem;
  }

  .site-header__tagline {
    font-size: 0.625rem;
    letter-spacing: 0.08em;
  }

  .nav-toggle {
    width: 2.75rem;
    height: 2.75rem;
  }

  .back-to-top {
    right: 1rem;
    bottom: 1rem;
  }

  .bento__item,
  .bento__item--wide,
  .bento__item--full,
  .bento__item--center {
    grid-column: 1 / -1;
  }
}

/* ===== 减少动态偏好 ===== */
@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;
  }
}