/* ==========================================================
   6688体育线上 · Site Kit 共享样式
   ========================================================== */

/* ---------- 变量 ---------- */
:root {
  --cream: #F5F0E6;
  --ink: #1D1613;
  --signal: #E85D30;
  --royal: #1F3A5F;
  --gold: #D4AF37;
  --glass: rgba(255, 255, 255, 0.55);
  --deep: rgba(30, 20, 15, 0.92);
  --mist: #C8C0B8;

  --font-heading: "Archivo Black", "PingFang SC", "Microsoft YaHei", sans-serif;
  --font-sub: "Archivo SemiExpanded", "PingFang SC", "Microsoft YaHei", sans-serif;
  --font-body: "Noto Sans SC", "Helvetica Neue", "PingFang SC", "Microsoft YaHei", sans-serif;
  --font-mono: "JetBrains Mono", "SFMono-Regular", Consolas, monospace;

  --rail-width: 84px;
  --content-max: 1200px;
  --header-height: 60px;

  --radius-pill: 999px;
  --radius-card: 16px;
  --radius-small: 8px;

  --shadow-float: 0 12px 40px rgba(29, 22, 19, 0.16);
  --shadow-card: 0 2px 16px rgba(29, 22, 19, 0.06);

  --transition: 300ms cubic-bezier(0.4, 0, 0.2, 1);
}

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

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

body {
  font-family: var(--font-body);
  font-size: 1rem;
  line-height: 1.7;
  color: var(--ink);
  background-color: var(--cream);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

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

a {
  color: inherit;
}

ul {
  list-style: none;
}

/* ---------- 无障碍 ---------- */
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

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

.skip-link {
  position: fixed;
  top: -120px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 300;
  background: var(--signal);
  color: #FFFFFF;
  font-size: 14px;
  font-weight: 600;
  padding: 14px 28px;
  border-radius: 0 0 16px 16px;
  text-decoration: none;
  transition: top var(--transition);
}

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

/* ---------- 阅读进度条 ---------- */
.reading-progress {
  position: fixed;
  top: 0;
  left: 0;
  height: 3px;
  width: 0;
  background: var(--signal);
  z-index: 220;
  border-radius: 0 2px 2px 0;
  pointer-events: none;
}

@media (min-width: 768px) {
  .reading-progress {
    left: var(--rail-width);
  }
}

/* ---------- 页面主体偏移 ---------- */
@media (min-width: 768px) {
  body {
    padding-left: var(--rail-width);
  }
}

@media (max-width: 767px) {
  body {
    padding-top: var(--header-height);
  }
}

/* ---------- 品牌轨 ---------- */
.brand-rail {
  position: fixed;
  top: 0;
  left: 0;
  bottom: 0;
  width: var(--rail-width);
  background: var(--deep);
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 28px 0 24px;
  z-index: 200;
}

.brand-mark {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  transition: opacity var(--transition);
}

.brand-mark:hover {
  opacity: 0.82;
}

.brand-dot {
  width: 10px;
  height: 10px;
  background: var(--signal);
  border-radius: 50%;
  flex-shrink: 0;
  box-shadow: 0 0 8px rgba(232, 93, 48, 0.6);
}

.brand-texts {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 2px;
}

.brand-name {
  font-family: var(--font-heading);
  font-size: 18px;
  font-weight: 700;
  color: var(--cream);
  line-height: 1.15;
  letter-spacing: 0.04em;
}

.brand-sub {
  font-family: var(--font-sub);
  font-size: 9px;
  letter-spacing: 0.22em;
  color: rgba(245, 240, 230, 0.5);
  line-height: 1.2;
  white-space: nowrap;
}

/* 品牌轨装饰轴 */
.rail-axis {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 10px;
  margin-top: auto;
  margin-bottom: 48px;
}

.axis-line {
  display: block;
  width: 1px;
  height: 56px;
  background: linear-gradient(to bottom, transparent, rgba(232, 93, 48, 0.7), transparent);
}

.axis-caption {
  font-family: var(--font-mono);
  font-size: 9px;
  letter-spacing: 0.24em;
  color: rgba(245, 240, 230, 0.45);
  writing-mode: vertical-rl;
  text-transform: uppercase;
}

/* ---------- 移动导航开关 ---------- */
.nav-toggle {
  display: none;
  position: relative;
  width: 40px;
  height: 40px;
  background: transparent;
  border: 1px solid rgba(245, 240, 230, 0.25);
  border-radius: 50%;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 5px;
  cursor: pointer;
  padding: 0;
  transition: border-color var(--transition), background var(--transition);
}

.nav-toggle:hover {
  border-color: var(--signal);
}

.toggle-bar {
  display: block;
  width: 16px;
  height: 2px;
  background: var(--cream);
  border-radius: 2px;
  transition: transform var(--transition), opacity var(--transition), background var(--transition);
}

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

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

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

/* ---------- 悬浮胶囊导航 ---------- */
.site-nav {
  position: fixed;
  top: 20px;
  right: 24px;
  z-index: 210;
  background: var(--glass);
  backdrop-filter: blur(16px) saturate(1.2);
  -webkit-backdrop-filter: blur(16px) saturate(1.2);
  border: 1px solid rgba(245, 240, 230, 0.4);
  border-radius: var(--radius-pill);
  box-shadow: var(--shadow-float);
  padding: 6px;
}

.nav-list {
  display: flex;
  align-items: center;
  gap: 2px;
}

.nav-link {
  display: block;
  padding: 10px 16px;
  border-radius: var(--radius-pill);
  font-family: var(--font-sub);
  font-size: 14px;
  font-weight: 500;
  color: var(--ink);
  text-decoration: none;
  line-height: 1;
  white-space: nowrap;
  position: relative;
  transition: color var(--transition), background var(--transition);
}

.nav-link::after {
  content: '';
  position: absolute;
  left: 50%;
  bottom: 3px;
  width: 0;
  height: 2px;
  background: var(--signal);
  transform: translateX(-50%);
  transition: width var(--transition);
}

.nav-link:hover,
.nav-link:focus-visible {
  color: var(--signal);
  background: rgba(232, 93, 48, 0.07);
}

.nav-link:hover::after,
.nav-link:focus-visible::after,
.nav-link[aria-current="page"]::after {
  width: 18px;
}

.nav-link[aria-current="page"] {
  color: var(--signal);
  font-weight: 600;
}

/* ---------- 返回顶部 ---------- */
.scroll-top {
  position: fixed;
  right: 24px;
  bottom: 28px;
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: var(--signal);
  color: #FFFFFF;
  border: none;
  box-shadow: var(--shadow-float);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  z-index: 180;
  opacity: 0;
  pointer-events: none;
  transform: translateY(16px);
  transition: opacity var(--transition), transform var(--transition), background var(--transition);
}

.scroll-top.is-visible {
  opacity: 1;
  pointer-events: auto;
  transform: translateY(0);
}

.scroll-top:hover {
  background: var(--ink);
}

.scroll-top-icon {
  font-size: 20px;
  line-height: 1;
}

/* ==========================================================
   移动端自适应（<= 767px）
   ========================================================== */
@media (max-width: 767px) {
  .brand-rail {
    flex-direction: row;
    justify-content: space-between;
    align-items: center;
    width: auto;
    height: var(--header-height);
    right: 0;
    bottom: auto;
    padding: 0 12px 0 16px;
  }

  .brand-texts {
    flex-direction: row;
    align-items: baseline;
  }

  .brand-name {
    font-size: 16px;
  }

  .brand-sub {
    font-size: 10px;
  }

  .rail-axis {
    display: none;
  }

  .nav-toggle {
    display: flex;
  }

  .site-nav {
    top: calc(var(--header-height) + 8px);
    left: 12px;
    right: 12px;
    border-radius: 20px;
    padding: 12px;
    border: 1px solid rgba(245, 240, 230, 0.45);
    transform: none;
    opacity: 1;
    pointer-events: auto;
    transition: transform var(--transition), opacity var(--transition);
  }

  .js-enabled .site-nav {
    transform: translateY(-12px);
    opacity: 0;
    pointer-events: none;
  }

  .js-enabled .site-nav[data-open] {
    transform: translateY(0);
    opacity: 1;
    pointer-events: auto;
  }

  .nav-list {
    flex-direction: column;
    align-items: stretch;
    gap: 4px;
  }

  .nav-link {
    padding: 14px 20px;
    text-align: center;
    font-size: 15px;
    white-space: normal;
  }

  .nav-link::after {
    bottom: 4px;
  }

  .scroll-top {
    right: 16px;
    bottom: 20px;
  }
}

/* ==========================================================
   页脚
   ========================================================== */
.site-footer {
  background: var(--deep);
  color: rgba(245, 240, 230, 0.82);
  margin-top: 96px;
  position: relative;
}

.site-footer::before {
  content: '';
  display: block;
  height: 4px;
  background: linear-gradient(90deg, var(--signal), var(--gold));
}

.footer-inner {
  max-width: var(--content-max);
  margin: 0 auto;
  padding: 56px 24px 40px;
  display: grid;
  grid-template-columns: 2fr 1fr 1.2fr 1.4fr;
  gap: 40px 32px;
}

.footer-brand {
  position: relative;
  padding-left: 20px;
}

.footer-brand::before {
  content: '';
  position: absolute;
  left: 0;
  top: 4px;
  bottom: 4px;
  width: 3px;
  border-radius: 3px;
  background: linear-gradient(var(--signal), var(--gold));
}

.footer-mark {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  margin-bottom: 16px;
  transition: opacity var(--transition);
}

.footer-mark:hover {
  opacity: 0.82;
}

.footer-mark-text {
  font-family: var(--font-heading);
  font-size: 18px;
  font-weight: 700;
  color: var(--cream);
  letter-spacing: 0.02em;
}

.footer-title {
  font-family: var(--font-sub);
  font-size: 15px;
  font-weight: 600;
  color: var(--cream);
  margin-bottom: 12px;
}

.footer-trust {
  font-size: 13px;
  line-height: 1.8;
  color: rgba(245, 240, 230, 0.6);
  max-width: 320px;
}

.footer-col-title {
  font-family: var(--font-sub);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--signal);
  margin-bottom: 18px;
}

.footer-links a {
  display: inline-block;
  padding: 5px 0;
  font-size: 14px;
  color: rgba(245, 240, 230, 0.72);
  text-decoration: none;
  transition: color var(--transition), transform var(--transition);
}

.footer-links a:hover,
.footer-links a:focus-visible {
  color: var(--signal);
  transform: translateX(4px);
}

.footer-contact {
  margin-top: 20px;
  padding-top: 16px;
  border-top: 1px solid rgba(245, 240, 230, 0.12);
}

.footer-contact p {
  font-size: 13px;
  line-height: 1.7;
  color: rgba(245, 240, 230, 0.6);
}

.footer-note {
  font-size: 13px;
  line-height: 1.9;
  color: rgba(245, 240, 230, 0.55);
  border-left: 2px solid var(--signal);
  padding-left: 14px;
  margin-bottom: 20px;
}

.footer-bottom {
  max-width: var(--content-max);
  margin: 0 auto;
  padding: 20px 24px 28px;
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
  border-top: 1px solid rgba(245, 240, 230, 0.1);
  font-size: 13px;
  color: rgba(245, 240, 230, 0.45);
}

/* ---------- 页脚响应式 ---------- */
@media (max-width: 991px) {
  .footer-inner {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 767px) {
  .footer-inner {
    grid-template-columns: 1fr;
    gap: 32px;
    padding: 40px 20px 32px;
  }

  .footer-bottom {
    flex-direction: column;
    text-align: center;
    padding: 16px 20px 24px;
  }
}

/* ==========================================================
   通用组件
   ========================================================== */

/* ---------- 内容容器 ---------- */
.container {
  width: 100%;
  max-width: var(--content-max);
  margin: 0 auto;
  padding-left: 24px;
  padding-right: 24px;
}

@media (max-width: 767px) {
  .container {
    padding-left: 16px;
    padding-right: 16px;
  }
}

/* ---------- 区块 ---------- */
.section {
  padding: 88px 0;
}

.section--dark {
  background: var(--deep);
  color: var(--cream);
}

.section--dark h1,
.section--dark h2,
.section--dark h3 {
  color: var(--cream);
}

@media (max-width: 767px) {
  .section {
    padding: 56px 0;
  }
}

/* ---------- 区块眉标 ---------- */
.section-label {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--signal);
  margin-bottom: 20px;
}

.section-label::before {
  content: '';
  width: 26px;
  height: 2px;
  background: var(--signal);
}

/* ---------- 按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 28px;
  border-radius: var(--radius-pill);
  background: var(--signal);
  color: #FFFFFF;
  font-family: var(--font-body);
  font-size: 14px;
  font-weight: 600;
  line-height: 1;
  text-decoration: none;
  border: 2px solid transparent;
  cursor: pointer;
  transition: background var(--transition), color var(--transition), border-color var(--transition), transform var(--transition);
}

.btn:hover,
.btn:focus-visible {
  background: var(--ink);
  color: var(--cream);
  transform: translateY(-2px);
}

.btn--ghost {
  background: transparent;
  border-color: var(--ink);
  color: var(--ink);
}

.btn--ghost:hover,
.btn--ghost:focus-visible {
  background: var(--ink);
  color: var(--cream);
  border-color: var(--ink);
}

.btn--light {
  background: var(--cream);
  color: var(--ink);
  border-color: var(--cream);
}

.btn--light:hover,
.btn--light:focus-visible {
  background: transparent;
  border-color: var(--cream);
  color: var(--cream);
}

/* ---------- 网格 ---------- */
.grid {
  display: grid;
  gap: 28px;
}

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

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

@media (max-width: 767px) {
  .grid--2,
  .grid--3 {
    grid-template-columns: minmax(0, 1fr);
  }
}

/* ---------- 卡片 ---------- */
.card {
  background: #FFFFFF;
  border-radius: var(--radius-card);
  padding: 28px;
  border: 1px solid rgba(200, 192, 184, 0.65);
  box-shadow: var(--shadow-card);
  transition: transform var(--transition), box-shadow var(--transition);
}

.card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-float);
}

/* ---------- 展签 ---------- */
.exhibit-tag {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 5px 14px;
  border: 1px solid var(--mist);
  border-radius: var(--radius-pill);
  background: var(--glass);
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--royal);
  line-height: 1;
  letter-spacing: 0.04em;
}

/* ---------- 数字高亮 ---------- */
.stat-num {
  font-family: var(--font-mono);
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 600;
  color: var(--signal);
  line-height: 1.1;
  font-variant-numeric: tabular-nums;
}

/* ---------- 面包屑 ---------- */
.breadcrumbs {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  padding: 16px 0;
  font-size: 13px;
}

.breadcrumbs li {
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

.breadcrumbs li + li::before {
  content: '·';
  color: var(--mist);
}

.breadcrumbs a {
  color: var(--ink);
  text-decoration: none;
  transition: color var(--transition);
}

.breadcrumbs a:hover,
.breadcrumbs a:focus-visible {
  color: var(--signal);
}

.breadcrumbs [aria-current="page"] {
  color: var(--mist);
  cursor: default;
}

/* ---------- 图片容器 ---------- */
.img-frame {
  position: relative;
  overflow: hidden;
  border-radius: var(--radius-card);
  background: var(--mist);
}

.img-frame img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.6s cubic-bezier(0.4, 0, 0.2, 1);
}

.img-frame:hover img {
  transform: scale(1.03);
}

.img-frame--wide {
  aspect-ratio: 16 / 9;
}

.img-frame--square {
  aspect-ratio: 1 / 1;
}

.img-frame--portrait {
  aspect-ratio: 4 / 5;
}

/* ---------- 滚动显现 ---------- */
[data-reveal] {
  opacity: 1;
  transform: none;
}

.js-enabled [data-reveal] {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.7s cubic-bezier(0.4, 0, 0.2, 1), transform 0.7s cubic-bezier(0.4, 0, 0.2, 1);
}

.js-enabled [data-reveal].is-revealed {
  opacity: 1;
  transform: translateY(0);
}

/* ==========================================================
   无障碍：降低动效
   ========================================================== */
@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;
    transition-delay: 0s !important;
  }

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

  .scroll-top {
    transition: none;
  }
}