/* ==========================================================
   6688体育平台 — 共享样式表 /assets/site.css
   ========================================================== */

/* ---------- 1. CSS 变量 ---------- */
:root {
  --color-primary: #0A1A3F;
  --color-primary-light: #1E3A6E;
  --color-accent: #FF6B00;
  --color-accent-soft: #FF8C42;
  --color-bg: #F5F7FA;
  --color-white: #FFFFFF;
  --color-text: #2D3436;
  --color-text-soft: #95A5A6;
  --color-text-on-dark: rgba(255, 255, 255, 0.72);

  --header-height: 72px;
  --container-width: 1200px;
  --container-padding: 24px;

  --radius-sm: 8px;
  --radius-md: 16px;
  --radius-lg: 24px;
  --radius-pill: 999px;

  --font-display: "Arial Black", "Arial Bold", "Microsoft YaHei", sans-serif;
  --font-body: "Microsoft YaHei", "PingFang SC", "Helvetica Neue", Arial, sans-serif;
  --font-mono: "Roboto Mono", "SF Mono", "Consolas", "Courier New", monospace;
  --font-num: "DIN Alternate", "Bahnschrift", "Arial Narrow", Arial, sans-serif;

  --shadow-sm: 0 2px 8px rgba(10, 26, 63, 0.06);
  --shadow-md: 0 8px 28px rgba(10, 26, 63, 0.1);
  --shadow-accent: 0 6px 24px rgba(255, 107, 0, 0.32);

  --transition-fast: 0.2s ease;
  --transition-base: 0.35s cubic-bezier(0.4, 0, 0.2, 1);

  --section-space: clamp(4rem, 8vw, 7rem);
}

/* ---------- 2. 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 {
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.8;
  color: var(--color-text);
  background: var(--color-bg);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

img,
video,
canvas {
  display: block;
  max-width: 100%;
  height: auto;
}

a {
  color: var(--color-accent);
  text-decoration: none;
  transition: color var(--transition-fast);
}

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

ul,
ol {
  list-style: none;
}

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

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

h1,
h2,
h3,
h4,
h5,
h6 {
  line-height: 1.25;
  font-weight: 700;
}

:focus-visible {
  outline: 3px solid var(--color-accent);
  outline-offset: 3px;
  border-radius: 4px;
}

/* ---------- 3. 布局工具 ---------- */
.container {
  width: min(100% - var(--container-padding) * 2, var(--container-width));
  margin-inline: auto;
}

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

.section--tight {
  padding-block: calc(var(--section-space) / 1.5);
}

.section--dark {
  background: var(--color-primary);
  color: var(--color-white);
}

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

.page-body {
  padding-top: var(--header-height);
  min-height: 60vh;
}

#main-content {
  min-height: 60vh;
}

/* ---------- 4. 排版 ---------- */
.display-title {
  font-family: var(--font-display);
  font-size: clamp(40px, 7vw, 76px);
  font-weight: 900;
  letter-spacing: -0.02em;
  line-height: 1.06;
  color: var(--color-primary);
  word-break: break-word;
}

.display-title--light {
  color: var(--color-white);
}

.section-title {
  font-size: clamp(24px, 3.5vw, 38px);
  font-weight: 800;
  line-height: 1.2;
  letter-spacing: -0.01em;
  color: var(--color-primary);
  margin-bottom: 0.4em;
}

.section-title--light {
  color: var(--color-white);
}

.title-index {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.12em;
  color: var(--color-accent);
  display: inline-block;
  margin-right: 8px;
  text-transform: uppercase;
  vertical-align: middle;
}

.section-kicker {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 13px;
  font-family: var(--font-mono);
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--color-accent);
  margin-bottom: 12px;
}

.section-kicker::before {
  content: "";
  width: 24px;
  height: 2px;
  background: var(--color-accent);
  border-radius: 2px;
  flex-shrink: 0;
}

.lead {
  font-size: 18px;
  line-height: 1.9;
  color: var(--color-text-soft);
  max-width: 680px;
}

.lead--light {
  color: var(--color-text-on-dark);
}

/* ---------- 5. 头部 ---------- */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  height: var(--header-height);
  background: transparent;
  transition: background-color var(--transition-base), box-shadow var(--transition-base);
}

.site-header[data-scrolled] {
  background: var(--color-primary);
  box-shadow: 0 4px 24px rgba(10, 26, 63, 0.28);
}

.site-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  height: 100%;
  width: min(100% - var(--container-padding) * 2, var(--container-width));
  margin-inline: auto;
  position: relative;
  z-index: 1;
}

/* 品牌 */
.site-brand {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
  color: var(--color-white);
}

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

.site-brand__mark {
  font-family: var(--font-display);
  font-size: 20px;
  font-weight: 900;
  letter-spacing: -0.5px;
  background: var(--color-accent);
  color: var(--color-white);
  padding: 3px 12px;
  border-radius: var(--radius-pill);
  line-height: 1.4;
  box-shadow: 0 2px 12px rgba(255, 107, 0, 0.35);
  transition: background-color var(--transition-fast), transform var(--transition-fast);
}

.site-brand:hover .site-brand__mark {
  background: var(--color-accent-soft);
  transform: scale(1.04);
}

.site-brand__text {
  display: flex;
  flex-direction: column;
  line-height: 1.25;
}

.site-brand__name {
  font-size: 17px;
  font-weight: 700;
  letter-spacing: 0.02em;
  color: var(--color-white);
}

.site-brand__tag {
  font-size: 10px;
  letter-spacing: 0.14em;
  color: rgba(255, 255, 255, 0.55);
  white-space: nowrap;
}

/* 导航 */
.site-nav__list {
  display: flex;
  align-items: center;
  gap: 2px;
}

.site-nav__link {
  display: block;
  padding: 8px 14px;
  border-radius: var(--radius-pill);
  color: rgba(255, 255, 255, 0.88);
  font-size: 14px;
  font-weight: 500;
  line-height: 1.4;
  white-space: nowrap;
  transition: color var(--transition-fast), background-color var(--transition-fast), transform var(--transition-fast);
}

.site-nav__link:hover {
  color: var(--color-white);
  background: rgba(255, 255, 255, 0.1);
  transform: translateY(-1px);
}

.site-nav__link[aria-current="page"] {
  color: var(--color-accent);
  background: rgba(255, 107, 0, 0.14);
  font-weight: 700;
}

/* 头部 CTA */
.site-header__cta {
  flex-shrink: 0;
}

/* 移动导航按钮 */
.site-nav-toggle {
  display: none;
  width: 44px;
  height: 44px;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 5px;
  border-radius: var(--radius-md);
  transition: background-color var(--transition-fast);
  flex-shrink: 0;
}

.site-nav-toggle:hover {
  background: rgba(255, 255, 255, 0.08);
}

.site-nav-toggle__bar {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--color-white);
  border-radius: 2px;
  transition: transform var(--transition-fast), opacity var(--transition-fast), background-color var(--transition-fast);
}

.site-nav-toggle[aria-expanded="true"] .site-nav-toggle__bar:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

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

.site-nav-toggle[aria-expanded="true"] .site-nav-toggle__bar:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* ---------- 6. 移动端导航（<1024px） ---------- */
@media (max-width: 1023px) {
  .site-nav-toggle {
    display: flex;
  }

  .site-header__cta {
    display: none;
  }

  .site-nav {
    position: fixed;
    top: 0;
    right: 0;
    bottom: 0;
    width: min(320px, 86vw);
    background: var(--color-primary);
    padding: calc(var(--header-height) + 24px) 24px 32px;
    overflow-y: auto;
    -webkit-overflow-scrolling: touch;
    transform: translateX(105%);
    transition: transform var(--transition-base);
    box-shadow: -12px 0 40px rgba(10, 26, 63, 0.3);
    z-index: 1001;
  }

  .site-nav[data-open] {
    transform: translateX(0);
  }

  .site-nav__list {
    flex-direction: column;
    align-items: stretch;
    gap: 6px;
  }

  .site-nav__link {
    padding: 13px 18px;
    font-size: 17px;
    width: 100%;
    border-radius: var(--radius-md);
  }

  body.nav-open {
    overflow: hidden;
  }
}

/* ---------- 7. 按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 10px 26px;
  border-radius: var(--radius-pill);
  font-size: 15px;
  font-weight: 700;
  line-height: 1.4;
  cursor: pointer;
  text-align: center;
  white-space: nowrap;
  transition: background-color var(--transition-fast), color var(--transition-fast), transform var(--transition-fast), box-shadow var(--transition-fast);
}

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

.btn--accent:hover {
  background: var(--color-accent-soft);
  color: var(--color-white);
  transform: translateY(-2px);
  box-shadow: var(--shadow-accent);
}

.btn--ghost {
  background: transparent;
  color: var(--color-white);
  border: 2px solid rgba(255, 255, 255, 0.6);
}

.btn--ghost:hover {
  border-color: var(--color-white);
  color: var(--color-white);
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(255, 255, 255, 0.12);
}

.btn--ghost-dark {
  background: transparent;
  color: var(--color-primary);
  border: 2px solid var(--color-primary-light);
}

.btn--ghost-dark:hover {
  border-color: var(--color-primary);
  color: var(--color-primary);
  transform: translateY(-2px);
  box-shadow: var(--shadow-sm);
}

.btn--lg {
  padding: 14px 36px;
  font-size: 16px;
}

.btn--sm {
  padding: 6px 16px;
  font-size: 13px;
}

/* ---------- 8. 胶囊标签 ---------- */
.tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 14px;
  border-radius: var(--radius-pill);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.04em;
  background: rgba(255, 107, 0, 0.1);
  color: var(--color-accent);
  border: 1px solid rgba(255, 107, 0, 0.2);
  transition: background-color var(--transition-fast), color var(--transition-fast), border-color var(--transition-fast);
}

.tag:hover {
  background: var(--color-accent);
  color: var(--color-white);
  border-color: var(--color-accent);
}

.tag--dark {
  background: rgba(255, 255, 255, 0.1);
  color: rgba(255, 255, 255, 0.8);
  border: 1px solid rgba(255, 255, 255, 0.18);
}

.tag--dark:hover {
  background: var(--color-accent);
  color: var(--color-white);
  border-color: var(--color-accent);
}

/* ---------- 9. 面包屑 ---------- */
.breadcrumbs {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 6px;
  font-size: 13px;
  color: var(--color-text-soft);
  margin-bottom: 32px;
}

.breadcrumbs li {
  display: flex;
  align-items: center;
  gap: 6px;
}

.breadcrumbs li + li::before {
  content: "/";
  color: var(--color-text-soft);
  opacity: 0.6;
  font-family: var(--font-mono);
}

.breadcrumbs a {
  color: var(--color-text-soft);
  transition: color var(--transition-fast);
}

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

.breadcrumbs__current {
  color: var(--color-text);
  font-weight: 600;
}

/* ---------- 10. 页脚 ---------- */
.site-footer {
  background: var(--color-primary);
  color: rgba(255, 255, 255, 0.8);
  padding-top: 60px;
  position: relative;
  overflow: hidden;
}

.site-footer::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: linear-gradient(90deg, var(--color-accent) 0%, transparent 35%, rgba(255, 107, 0, 0.5) 70%, var(--color-accent) 100%);
}

.site-footer::after {
  content: "";
  position: absolute;
  right: -80px;
  bottom: -100px;
  width: 260px;
  height: 260px;
  border: 2px solid rgba(255, 107, 0, 0.1);
  border-radius: 50%;
  pointer-events: none;
}

.site-footer__top {
  display: grid;
  grid-template-columns: 1.1fr 2fr;
  gap: clamp(32px, 5vw, 72px);
  padding-bottom: 48px;
  position: relative;
  z-index: 1;
}

.site-footer__intro {
  max-width: 420px;
}

.site-footer__brand {
  display: inline-flex;
  flex-direction: column;
  gap: 4px;
}

.site-footer__brand-name {
  font-family: var(--font-display);
  font-size: 22px;
  font-weight: 900;
  color: var(--color-white);
  letter-spacing: -0.01em;
}

.site-footer__brand-tag {
  font-size: 13px;
  color: var(--color-accent);
  letter-spacing: 0.04em;
}

.site-footer__trust {
  margin-top: 18px;
  font-size: 13px;
  line-height: 1.9;
  color: rgba(255, 255, 255, 0.5);
}

.site-footer__cols {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

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

.site-footer__heading {
  font-size: 13px;
  font-weight: 700;
  color: var(--color-white);
  letter-spacing: 0.14em;
  text-transform: uppercase;
  margin-bottom: 18px;
  padding-bottom: 10px;
  position: relative;
}

.site-footer__heading::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 28px;
  height: 3px;
  background: var(--color-accent);
  border-radius: 2px;
}

.site-footer__list li {
  margin-bottom: 10px;
  font-size: 14px;
  line-height: 1.6;
  color: rgba(255, 255, 255, 0.62);
}

.site-footer__list a {
  color: rgba(255, 255, 255, 0.62);
  text-decoration: none;
  transition: color var(--transition-fast), padding-left var(--transition-fast), opacity var(--transition-fast);
}

.site-footer__list a:hover {
  color: var(--color-accent);
  padding-left: 4px;
  opacity: 1;
}

.site-footer__label {
  display: block;
  font-size: 11px;
  font-family: var(--font-mono);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: rgba(255, 255, 255, 0.32);
  margin-bottom: 2px;
}

.site-footer__list--contact li {
  margin-bottom: 12px;
  font-size: 13px;
  color: rgba(255, 255, 255, 0.82);
  line-height: 1.5;
  word-break: break-all;
}

.site-footer__bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  padding-block: 20px;
  position: relative;
  z-index: 1;
}

.site-footer__bottom-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 8px 24px;
  font-size: 13px;
  color: rgba(255, 255, 255, 0.4);
}

/* ---------- 11. Bento 网格 ---------- */
.bento {
  display: grid;
  grid-template-columns: repeat(12, 1fr);
  gap: clamp(16px, 2vw, 24px);
}

.bento > * {
  min-width: 0;
}

/* ---------- 12. 卡片 ---------- */
.card {
  background: var(--color-white);
  border-radius: var(--radius-lg);
  padding: clamp(20px, 3vw, 32px);
  box-shadow: var(--shadow-sm);
  transition: transform var(--transition-base), box-shadow var(--transition-base);
  position: relative;
  overflow: hidden;
}

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

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

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

.card__title {
  font-size: 19px;
  font-weight: 800;
  color: var(--color-primary);
  margin-bottom: 8px;
  line-height: 1.35;
}

.card__index {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  color: var(--color-accent);
  text-transform: uppercase;
  display: block;
  margin-bottom: 12px;
}

.card__body {
  font-size: 14px;
  color: var(--color-text-soft);
  line-height: 1.8;
}

.card--dark .card__title {
  color: var(--color-white);
}

.card--dark .card__body {
  color: rgba(255, 255, 255, 0.62);
}

.card--dark:hover {
  box-shadow: 0 12px 36px rgba(10, 26, 63, 0.3);
}

/* ---------- 13. 图片容器 ---------- */
.image-frame {
  position: relative;
  display: block;
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-light) 100%);
  isolation: isolate;
}

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

.image-frame--portrait::before {
  padding-top: 125%;
}

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

.image-frame--hero::before {
  padding-top: 42%;
}

.image-frame img,
.image-frame > * {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.image-frame__placeholder {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 8px;
  color: rgba(255, 255, 255, 0.45);
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.08em;
  text-align: center;
  padding: 20px;
}

.image-frame__placeholder::before {
  content: "";
  width: 48px;
  height: 4px;
  border-radius: 4px;
  background: rgba(255, 107, 0, 0.6);
  margin-bottom: 4px;
}

/* ---------- 14. 页头（Hero 模板） ---------- */
.page-hero {
  background: var(--color-primary);
  color: var(--color-white);
  padding-top: calc(var(--header-height) + clamp(40px, 7vw, 84px));
  padding-bottom: clamp(36px, 6vw, 72px);
  position: relative;
  overflow: hidden;
}

.page-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(255, 107, 0, 0.08) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 107, 0, 0.08) 1px, transparent 1px);
  background-size: 60px 60px;
  pointer-events: none;
  -webkit-mask-image: radial-gradient(ellipse at 70% 0%, black 0%, transparent 70%);
  mask-image: radial-gradient(ellipse at 70% 0%, black 0%, transparent 70%);
}

.page-hero__inner {
  position: relative;
  z-index: 1;
}

.page-hero__title {
  font-family: var(--font-display);
  font-size: clamp(32px, 5vw, 56px);
  font-weight: 900;
  line-height: 1.08;
  letter-spacing: -0.02em;
  margin-bottom: 16px;
}

.page-hero__sub {
  font-size: 17px;
  line-height: 1.8;
  color: rgba(255, 255, 255, 0.68);
  max-width: 640px;
}

.page-hero--compact {
  padding-top: calc(var(--header-height) + 24px);
  padding-bottom: 24px;
}

/* ---------- 15. Reveal 动效 ---------- */
html.js-enabled [data-reveal] {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity 0.7s ease, transform 0.7s cubic-bezier(0.22, 1, 0.36, 1);
  will-change: opacity, transform;
}

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

/* ---------- 16. 跳转链接 ---------- */
.skip-link {
  position: fixed;
  top: -100px;
  left: 16px;
  z-index: 2000;
  background: var(--color-accent);
  color: var(--color-white);
  padding: 10px 22px;
  border-radius: var(--radius-pill);
  font-weight: 700;
  font-size: 14px;
  box-shadow: var(--shadow-accent);
  transition: top var(--transition-fast);
}

.skip-link:focus,
.skip-link:focus-visible {
  top: 12px;
}

/* ---------- 17. 响应式调整 ---------- */
@media (max-width: 1023px) {
  .site-footer__top {
    grid-template-columns: 1fr;
    gap: 40px;
  }

  .site-footer__intro {
    max-width: 100%;
  }
}

@media (max-width: 767px) {
  :root {
    --header-height: 60px;
    --container-padding: 20px;
  }

  .site-footer__cols {
    grid-template-columns: 1fr 1fr;
    gap: 32px 20px;
  }

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

  .lead {
    font-size: 16px;
  }

  .page-hero__sub {
    font-size: 15px;
  }
}

@media (max-width: 479px) {
  .site-footer__cols {
    grid-template-columns: 1fr;
  }

  .site-footer__col:first-child {
    grid-column: auto;
  }

  .site-brand__tag {
    display: none;
  }
}

/* ---------- 18. 无障碍弱动态 ---------- */
@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;
  }

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

  .site-nav {
    transition: none;
  }
}