/* ==========================================================================
   球速体育 共享样式 / Rapid Qiusu Shared CSS
   技术蓝图 · 框架导航 · 编辑刊物混合气质
   ========================================================================== */

/* ---------- 1. CSS 变量 ---------- */
:root {
  --color-bg: #F5F0E6;
  --color-ink: #1A1D1D;
  --color-blue: #0A2A4A;
  --color-green: #00E676;
  --color-gold: #FFB300;
  --color-line: #D0D0D0;
  --color-gray: #5F6B6B;
  --color-dark: #004D40;

  --font-heading: 'Source Serif Pro', 'Noto Serif SC', 'Songti SC', 'SimSun', serif;
  --font-body: 'Helvetica Neue', 'Noto Sans SC', 'PingFang SC', 'Microsoft YaHei', sans-serif;
  --font-data: 'Roboto Mono', 'SFMono-Regular', 'Consolas', 'Menlo', monospace;

  --header-h: 56px;
  --nav-w: 208px;
  --aux-w: 28px;
  --radius: 2px;
  --shadow: 0 2px 12px rgba(26, 29, 29, 0.08);
  --ease: 0.25s ease;
}

/* ---------- 2. Reset & Base ---------- */
html {
  box-sizing: border-box;
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

*, *::before, *::after {
  box-sizing: inherit;
}

body {
  margin: 0;
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.6;
  color: var(--color-ink);
  background-color: var(--color-bg);
  background-image:
    linear-gradient(rgba(10, 42, 74, 0.028) 1px, transparent 1px),
    linear-gradient(90deg, rgba(10, 42, 74, 0.028) 1px, transparent 1px);
  background-size: 40px 40px;
  padding-top: var(--header-h);
  min-height: 100vh;
}

h1, h2, h3, h4, h5, h6 {
  margin: 0;
  font-family: var(--font-heading);
  font-weight: 700;
  line-height: 1.25;
  letter-spacing: 0.01em;
}

p {
  margin: 0 0 1em;
}

a {
  color: var(--color-blue);
  text-decoration: underline;
  text-underline-offset: 3px;
  text-decoration-color: var(--color-line);
  transition: color var(--ease), text-decoration-color var(--ease);
}

a:hover {
  color: var(--color-green);
  text-decoration-color: var(--color-green);
}

ul, ol {
  margin: 0;
  padding: 0;
  list-style: none;
}

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

button {
  font: inherit;
  cursor: pointer;
  border: none;
  background: none;
  color: inherit;
  padding: 0;
}

input, textarea, select {
  font: inherit;
}

::selection {
  background: rgba(0, 230, 118, 0.25);
  color: var(--color-ink);
}

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

.skip-link {
  position: fixed;
  top: calc(var(--header-h) * -1);
  left: 16px;
  z-index: 300;
  display: inline-block;
  padding: 12px 20px;
  background: var(--color-green);
  color: var(--color-blue);
  font-family: var(--font-body);
  font-weight: 700;
  font-size: 14px;
  text-decoration: none;
  border-radius: 0 0 4px 4px;
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.2);
  transition: top 0.25s ease;
}

.skip-link:focus {
  top: 0;
  color: var(--color-blue);
  text-decoration: none;
}

/* ---------- 4. 页头结构 ---------- */
.site-header {
  position: relative;
  z-index: 200;
}

/* --- 滚动进度条 --- */
.scroll-progress {
  position: fixed;
  top: 0;
  left: 0;
  width: 0%;
  height: 3px;
  background: linear-gradient(90deg, var(--color-green) 0%, var(--color-gold) 100%);
  z-index: 999;
  pointer-events: none;
}

/* --- 顶部细条 --- */
.header-topbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--header-h);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  padding: 0 24px;
  background: var(--color-blue);
  border-bottom: 1px solid rgba(0, 230, 118, 0.22);
  z-index: 210;
}

.header-brand {
  display: flex;
  align-items: center;
  flex-shrink: 0;
}

.brand-link {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  color: #FFFFFF;
}

.brand-link:hover {
  color: var(--color-gold);
  text-decoration: none;
}

.brand-glyph {
  font-size: 16px;
  color: var(--color-gold);
  transition: transform 0.3s ease;
  display: inline-block;
}

.brand-link:hover .brand-glyph {
  transform: rotate(90deg);
}

.brand-name {
  font-family: var(--font-heading);
  font-size: 22px;
  font-weight: 700;
  letter-spacing: 0.06em;
  color: #FFFFFF;
  white-space: nowrap;
}

.header-meta {
  display: flex;
  align-items: center;
  gap: 24px;
  flex: 1;
  justify-content: flex-end;
}

.header-tagline {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 13px;
  color: rgba(255, 255, 255, 0.6);
  white-space: nowrap;
}

.meta-slash {
  font-family: var(--font-data);
  color: var(--color-green);
  font-size: 12px;
}

.header-access {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-data);
  font-size: 11px;
  color: var(--color-green);
  letter-spacing: 0.04em;
  white-space: nowrap;
  border: 1px solid rgba(0, 230, 118, 0.25);
  padding: 3px 10px;
  border-radius: 2px;
}

.access-pulse {
  width: 6px;
  height: 6px;
  background: var(--color-green);
  border-radius: 50%;
  flex-shrink: 0;
  box-shadow: 0 0 6px rgba(0, 230, 118, 0.7);
}

/* --- 汉堡按钮 --- */
.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 44px;
  height: 44px;
  padding: 10px;
  border: 1px solid rgba(255, 255, 255, 0.15);
  border-radius: 2px;
  background: transparent;
  z-index: 230;
}

.nav-toggle-bar {
  display: block;
  width: 100%;
  height: 2px;
  background: var(--color-green);
  border-radius: 1px;
  transition: background 0.2s ease;
}

.nav-toggle:hover .nav-toggle-bar {
  background: var(--color-gold);
}

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

.nav-toggle-bar {
  transition: transform 0.3s ease, opacity 0.3s ease, background 0.2s ease;
}

/* --- 左侧导航轨道 --- */
.site-nav {
  position: fixed;
  top: var(--header-h);
  left: 0;
  bottom: 0;
  width: var(--nav-w);
  display: flex;
  flex-direction: column;
  background: var(--color-blue);
  border-right: 1px solid rgba(0, 230, 118, 0.15);
  z-index: 200;
  overflow-y: auto;
  overscroll-behavior: contain;
}

.nav-rail-label {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 20px 24px 12px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.rail-label-code {
  font-family: var(--font-data);
  font-size: 11px;
  color: var(--color-gold);
  letter-spacing: 0.15em;
}

.rail-label-text {
  font-family: var(--font-body);
  font-size: 12px;
  color: rgba(255, 255, 255, 0.45);
}

.nav-rail {
  flex: 1;
  display: flex;
  flex-direction: column;
  padding: 8px 0;
}

.nav-item {
  position: relative;
}

.nav-link {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 14px 20px 14px 24px;
  text-decoration: none;
  border-left: 3px solid transparent;
  background: transparent;
  transition: background 0.2s ease, border-color 0.25s ease;
}

.nav-link:hover {
  text-decoration: none;
  background: rgba(0, 230, 118, 0.04);
  border-left-color: rgba(0, 230, 118, 0.55);
}

.nav-link[aria-current="page"] {
  background: rgba(0, 230, 118, 0.08);
  border-left-color: var(--color-green);
}

.nav-index {
  font-family: var(--font-data);
  font-size: 11px;
  color: rgba(255, 255, 255, 0.3);
  letter-spacing: 0.08em;
  min-width: 20px;
  transition: color 0.2s ease;
}

.nav-link:hover .nav-index {
  color: var(--color-green);
}

.nav-link[aria-current="page"] .nav-index {
  color: var(--color-gold);
}

.nav-label {
  font-family: var(--font-body);
  font-size: 15px;
  font-weight: 500;
  color: rgba(255, 255, 255, 0.75);
  letter-spacing: 0.05em;
  transition: color 0.2s ease;
}

.nav-link:hover .nav-label {
  color: #FFFFFF;
}

.nav-link[aria-current="page"] .nav-label {
  color: #FFFFFF;
  font-weight: 700;
}

.nav-rail-footer {
  padding: 16px 20px;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.rail-version {
  font-family: var(--font-data);
  font-size: 11px;
  color: var(--color-gold);
  letter-spacing: 0.1em;
}

.rail-domain {
  font-family: var(--font-data);
  font-size: 10px;
  color: rgba(255, 255, 255, 0.3);
  letter-spacing: 0.06em;
  word-break: break-all;
}

/* --- 右侧辅助竖排链接 --- */
.header-auxrail {
  position: fixed;
  right: 0;
  top: var(--header-h);
  bottom: 0;
  width: var(--aux-w);
  display: none;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 18px;
  z-index: 80;
  pointer-events: none;
}

.auxrail-link {
  writing-mode: vertical-rl;
  font-family: var(--font-data);
  font-size: 10px;
  letter-spacing: 0.18em;
  text-decoration: none;
  color: var(--color-gray);
  pointer-events: auto;
  padding: 6px 2px;
  transition: color 0.25s ease;
  border-left: 1px solid transparent;
}

.auxrail-link:hover {
  color: var(--color-green);
  border-left-color: var(--color-green);
  text-decoration: none;
}

.auxrail-dot {
  width: 3px;
  height: 3px;
  border-radius: 50%;
  background: var(--color-gold);
  flex-shrink: 0;
}

/* ---------- 5. 页脚 ---------- */
.site-footer {
  background: var(--color-dark);
  color: rgba(255, 255, 255, 0.75);
  border-top: 2px solid var(--color-gold);
  font-size: 14px;
  line-height: 1.7;
}

.footer-main {
  max-width: 1280px;
  margin: 0 auto;
  padding: 56px 32px 40px;
  display: grid;
  grid-template-columns: 1.6fr 0.9fr 0.9fr 1.3fr;
  gap: 40px;
}

.footer-brand-block {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.footer-brand {
  font-family: var(--font-heading);
  font-size: 26px;
  font-weight: 700;
  color: #FFFFFF;
  letter-spacing: 0.08em;
}

.footer-claim {
  font-family: var(--font-data);
  font-size: 12px;
  color: var(--color-green);
  letter-spacing: 0.08em;
  margin: 0;
}

.footer-trust {
  font-size: 13px;
  line-height: 1.8;
  color: rgba(255, 255, 255, 0.5);
  margin: 8px 0 0;
  max-width: 320px;
}

.footer-column {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.footer-heading {
  font-family: var(--font-data);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--color-gold);
  margin: 0;
  padding-bottom: 8px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-list {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.footer-list a {
  color: rgba(255, 255, 255, 0.6);
  text-decoration: none;
  font-size: 13px;
  transition: color 0.2s ease, padding-left 0.2s ease;
}

.footer-list a:hover {
  color: var(--color-green);
  padding-left: 4px;
}

.footer-contact-list {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.footer-contact-list li {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.contact-label {
  font-family: var(--font-data);
  font-size: 10px;
  color: var(--color-green);
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.contact-value {
  font-size: 13px;
  color: rgba(255, 255, 255, 0.65);
  word-break: break-all;
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  padding: 16px 32px;
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: center;
  gap: 8px 24px;
  max-width: 1280px;
  margin: 0 auto;
}

.footer-copyright,
.footer-icp {
  font-family: var(--font-data);
  font-size: 11px;
  color: rgba(255, 255, 255, 0.35);
  margin: 0;
}

/* ---------- 6. 正文容器 ---------- */
.page-container {
  width: 100%;
  max-width: 1280px;
  margin: 0 auto;
  padding: 48px 32px 96px;
}

#main-content {
  min-height: 70vh;
  outline: none;
}

/* ---------- 7. 通用组件 ---------- */
/* 按钮 */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 10px 26px;
  font-family: var(--font-body);
  font-size: 14px;
  font-weight: 600;
  line-height: 1.5;
  text-decoration: none;
  border: 1px solid var(--color-blue);
  border-radius: var(--radius);
  background: transparent;
  color: var(--color-blue);
  cursor: pointer;
  transition: all 0.25s ease;
}

.btn:hover {
  text-decoration: none;
  background: rgba(10, 42, 74, 0.06);
  border-color: var(--color-blue);
  color: var(--color-blue);
}

.btn-primary {
  background: var(--color-blue);
  color: #FFFFFF;
  border-color: var(--color-blue);
}

.btn-primary:hover {
  background: var(--color-dark);
  border-color: var(--color-dark);
  color: #FFFFFF;
}

.btn-ghost {
  border-color: var(--color-line);
  color: var(--color-gray);
}

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

/* 面包屑 */
.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 4px 0;
  margin: 0 0 32px;
  font-family: var(--font-data);
  font-size: 12px;
  color: var(--color-gray);
}

.breadcrumb li {
  display: inline-flex;
  align-items: center;
}

.breadcrumb li + li::before {
  content: "/";
  color: var(--color-line);
  margin: 0 10px;
}

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

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

.breadcrumb [aria-current="page"] {
  color: var(--color-ink);
  font-weight: 700;
}

/* 标签 */
.tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 12px;
  font-family: var(--font-data);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.06em;
  border: 1px solid var(--color-line);
  border-radius: 2px;
  color: var(--color-gray);
  background: rgba(255, 255, 255, 0.5);
  transition: border-color 0.2s ease, color 0.2s ease;
}

.tag-gold {
  border-color: var(--color-gold);
  color: #8a6400;
  background: rgba(255, 179, 0, 0.1);
}

.tag-green {
  border-color: var(--color-green);
  color: #006b3f;
  background: rgba(0, 230, 118, 0.1);
}

/* 图片框架 */
.image-frame {
  position: relative;
  display: block;
  overflow: hidden;
  background: var(--color-blue);
  border: 1px solid var(--color-line);
  border-radius: 2px;
}

.image-frame::before {
  content: attr(data-label);
  position: absolute;
  top: 8px;
  left: 8px;
  z-index: 2;
  padding: 3px 8px;
  font-family: var(--font-data);
  font-size: 10px;
  letter-spacing: 0.08em;
  color: var(--color-green);
  background: rgba(10, 42, 74, 0.82);
  border: 1px solid rgba(0, 230, 118, 0.3);
}

.image-frame::after {
  content: "IMAGE / " attr(data-coord);
  position: absolute;
  right: 8px;
  bottom: 6px;
  z-index: 2;
  font-family: var(--font-data);
  font-size: 9px;
  color: rgba(255, 255, 255, 0.4);
  letter-spacing: 0.12em;
}

.image-frame img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.image-frame-16-9 { aspect-ratio: 16 / 9; }
.image-frame-4-3  { aspect-ratio: 4 / 3; }
.image-frame-3-4  { aspect-ratio: 3 / 4; }

/* 章节头部 */
.section-index {
  display: block;
  font-family: var(--font-data);
  font-size: 13px;
  letter-spacing: 0.1em;
  color: var(--color-gold);
  margin-bottom: 8px;
}

.section-title {
  font-family: var(--font-heading);
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 700;
  letter-spacing: 0.01em;
  line-height: 1.15;
  margin-bottom: 12px;
}

.section-meta {
  font-family: var(--font-data);
  font-size: 13px;
  color: var(--color-gray);
  margin-bottom: 24px;
}

/* 数据表 */
.data-table {
  width: 100%;
  border-collapse: collapse;
  font-family: var(--font-body);
  font-size: 14px;
}

.data-table th {
  font-family: var(--font-data);
  font-size: 11px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  text-align: left;
  padding: 10px 14px;
  border-bottom: 2px solid var(--color-blue);
  color: var(--color-blue);
  background: rgba(10, 42, 74, 0.05);
  white-space: nowrap;
}

.data-table td {
  padding: 12px 14px;
  border-bottom: 1px solid var(--color-line);
  color: var(--color-ink);
}

.data-table tbody tr {
  transition: background 0.2s ease;
}

.data-table tbody tr:hover {
  background: rgba(0, 230, 118, 0.06);
}

.data-table .num {
  font-family: var(--font-data);
  color: var(--color-blue);
  font-weight: 500;
}

/* 分区 */
.page-section {
  margin-bottom: 72px;
}

/* ---------- 8. 响应式 ---------- */
@media (min-width: 1024px) {
  body {
    padding-left: var(--nav-w);
  }

  .nav-toggle {
    display: none;
  }

  .header-topbar {
    padding-left: calc(var(--nav-w) + 24px);
  }

  .header-auxrail {
    display: flex;
  }
}

@media (min-width: 1600px) {
  body {
    padding-right: var(--aux-w);
  }
}

@media (max-width: 1023.98px) {
  body {
    padding-left: 0;
  }

  .site-nav {
    width: 280px;
    max-width: 85vw;
    transform: translateX(-100%);
    transition: transform 0.35s cubic-bezier(0.4, 0, 0.2, 1);
    box-shadow: none;
    top: 0;
    bottom: 0;
    padding-top: var(--header-h);
  }

  .site-nav[data-open] {
    transform: translateX(0);
    box-shadow: 8px 0 24px rgba(0, 0, 0, 0.25);
  }

  .nav-toggle {
    display: flex;
  }

  .header-topbar {
    padding: 0 16px;
  }

  .header-meta {
    gap: 16px;
  }

  .header-auxrail {
    display: none;
  }

  .footer-main {
    grid-template-columns: 1fr 1fr;
    padding: 48px 24px 32px;
    gap: 32px;
  }
}

@media (max-width: 767.98px) {
  .header-meta {
    display: none;
  }

  .header-topbar {
    justify-content: space-between;
  }

  .page-container {
    padding: 32px 18px 72px;
  }

  .footer-main {
    grid-template-columns: 1fr;
    gap: 28px;
  }

  .footer-bottom {
    flex-direction: column;
    text-align: center;
    gap: 6px;
    padding: 16px;
  }
}

@media (max-width: 479.98px) {
  .brand-name {
    font-size: 19px;
  }

  .brand-glyph {
    font-size: 14px;
  }

  .header-topbar {
    padding: 0 12px;
  }

  .nav-toggle {
    width: 40px;
    height: 40px;
  }
}

/* ---------- 9. 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;
  }

  .skip-link {
    transition: none;
  }

  .site-nav {
    transition: none;
  }

  .nav-toggle-bar {
    transition: none;
  }

  .brand-glyph,
  .brand-link:hover .brand-glyph {
    transition: none;
    transform: none;
  }
}