/* ============================================================
   BSPORTS必一 · 全站共享样式
   深海蓝精密网格 / 悬浮胶囊导航 / 锐角数据浮岛 / 橙绿数据信号
   ============================================================ */

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

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

body {
  min-height: 100vh;
  overflow-x: hidden;
}

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

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

button {
  background: none;
  border: 0;
  cursor: pointer;
}

ul, ol {
  list-style: none;
}

a {
  color: inherit;
  text-decoration: none;
}

[hidden] {
  display: none !important;
}

::selection {
  background: var(--orange);
  color: #fff;
}

:root {
  --navy: #0A1F44;
  --navy-deep: #123A6B;
  --orange: #FF6B35;
  --green: #00E676;
  --green-2: #00C853;
  --white: #FFFFFF;
  --blue-gray: #A4B3D1;
  --line: #2B3A67;
  --light: #F0F4F8;
  --dark: #050D1F;

  --font-heading: "Archivo Black", "Arial Black", "PingFang SC", "Microsoft YaHei", sans-serif;
  --font-body: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
  --font-data: "Roboto Mono", "SFMono-Regular", "Consolas", "Liberation Mono", monospace;

  --container: 1280px;
  --header-height: 56px;
  --radius-pill: 999px;
  --transition: 0.25s cubic-bezier(0.2, 0.65, 0.3, 1);
  --z-header: 1000;
  --z-skip: 2000;
}

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

/* ---------- 2. 基础 ---------- */
body {
  font-family: var(--font-body);
  font-size: 1rem;
  line-height: 1.7;
  color: var(--white);
  background-color: var(--navy);
  background-image:
    linear-gradient(rgba(43, 58, 103, 0.26) 1px, transparent 1px),
    linear-gradient(90deg, rgba(43, 58, 103, 0.26) 1px, transparent 1px);
  background-size: 48px 48px;
}

body::before {
  content: "";
  position: fixed;
  top: -20vw;
  right: -15vw;
  width: 60vw;
  height: 60vw;
  min-width: 420px;
  min-height: 420px;
  background: radial-gradient(circle, rgba(255, 107, 53, 0.10) 0%, transparent 65%);
  background-repeat: no-repeat;
  pointer-events: none;
  z-index: 0;
}

.container {
  width: 100%;
  max-width: var(--container);
  margin: 0 auto;
  padding-left: 1rem;
  padding-right: 1rem;
}

.main-content {
  position: relative;
  z-index: 1;
  min-height: 70vh;
  padding-top: calc(var(--header-height) + 3rem);
}

.section {
  padding: 4rem 0;
}

.section-compact {
  padding: 2rem 0;
}

.divider {
  border: 0;
  height: 1px;
  background: linear-gradient(90deg, var(--line) 0%, transparent 100%);
}

/* ---------- 3. 无障碍与进度条 ---------- */
.skip-link {
  position: fixed;
  top: 1rem;
  left: 1rem;
  z-index: var(--z-skip);
  background: var(--orange);
  color: #fff;
  font-weight: 600;
  padding: 0.75rem 1.25rem;
  transform: translateY(-300%);
  transition: transform 0.25s ease;
}

.skip-link:focus {
  transform: translateY(0);
}

.scroll-progress {
  position: fixed;
  top: 0;
  left: 0;
  width: 0%;
  height: 3px;
  background: linear-gradient(90deg, var(--orange) 0%, var(--green) 100%);
  z-index: calc(var(--z-header) + 20);
  pointer-events: none;
}

/* ---------- 4. 页头：悬浮胶囊导航 ---------- */
.site-header {
  position: fixed;
  top: 1rem;
  left: 0;
  right: 0;
  z-index: var(--z-header);
  width: calc(100% - 2rem);
  width: min(calc(100% - 2rem), var(--container));
  margin: 0 auto;
}

@supports (padding: env(safe-area-inset-top)) {
  .site-header {
    top: max(1rem, env(safe-area-inset-top));
  }
}

.header-pill {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: var(--header-height);
  padding: 0 6px 0 20px;
  background: rgba(10, 31, 68, 0.88);
  border: 1px solid rgba(43, 58, 103, 0.9);
  border-radius: var(--radius-pill);
  box-shadow: 0 10px 30px rgba(5, 13, 31, 0.55);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
}

.brand-mark {
  display: inline-flex;
  align-items: center;
  gap: 0.625rem;
  color: var(--white);
}

.brand-cube {
  position: relative;
  flex: none;
  width: 26px;
  height: 26px;
  background: var(--orange);
}

.brand-cube::after {
  content: "";
  position: absolute;
  right: 0;
  bottom: 0;
  width: 12px;
  height: 12px;
  background: var(--navy);
}

.brand-text {
  font-family: var(--font-heading);
  font-size: 1rem;
  font-weight: 900;
  line-height: 1;
  letter-spacing: 0.02em;
}

.brand-text em {
  font-style: normal;
  color: var(--green);
}

.header-tools {
  display: flex;
  align-items: center;
  gap: 0.625rem;
}

.online-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.375rem 0.75rem;
  background: rgba(5, 13, 31, 0.4);
  border: 1px solid var(--line);
  border-radius: var(--radius-pill);
  font-family: var(--font-data);
  font-size: 0.6875rem;
  letter-spacing: 0.08em;
  color: var(--blue-gray);
}

.online-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--green);
  animation: online-pulse 2s infinite;
}

.online-text {
  color: var(--white);
}

@keyframes online-pulse {
  0% {
    box-shadow: 0 0 0 0 rgba(0, 230, 118, 0.4);
  }
  70% {
    box-shadow: 0 0 0 6px rgba(0, 230, 118, 0);
  }
  100% {
    box-shadow: 0 0 0 0 rgba(0, 230, 118, 0);
  }
}

.nav-toggle {
  display: inline-flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 5px;
  width: 44px;
  height: 44px;
  background: rgba(5, 13, 31, 0.4);
  border: 1px solid var(--line);
  border-radius: var(--radius-pill);
  transition: border-color var(--transition), background var(--transition);
}

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

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

.site-header[data-open] .nav-toggle-bar:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.site-header[data-open] .nav-toggle-bar:nth-child(2) {
  opacity: 0;
}

.site-header[data-open] .nav-toggle-bar:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* ---------- 5. 导航浮岛 ---------- */
.site-nav {
  position: absolute;
  top: calc(100% + 0.75rem);
  left: 0;
  right: 0;
  opacity: 0;
  visibility: hidden;
  transform: translateY(-10px);
  transition: opacity var(--transition), transform var(--transition), visibility var(--transition);
}

.site-header[data-open] .site-nav {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.nav-island {
  width: min(880px, 100%);
  margin-left: auto;
  padding: 1.25rem;
  background: rgba(10, 31, 68, 0.97);
  border: 1px solid var(--line);
  box-shadow: 0 24px 60px rgba(5, 13, 31, 0.6);
  backdrop-filter: blur(24px);
  -webkit-backdrop-filter: blur(24px);
  max-height: calc(100vh - 120px);
  overflow-y: auto;
  overscroll-behavior: contain;
}

.nav-island-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 0.75rem;
  padding-bottom: 0.5rem;
  border-bottom: 1px solid var(--line);
}

.nav-kicker {
  font-family: var(--font-data);
  font-size: 0.75rem;
  letter-spacing: 0.14em;
  color: var(--green);
}

.nav-close-hint {
  font-family: var(--font-data);
  font-size: 0.6875rem;
  letter-spacing: 0.08em;
  color: var(--blue-gray);
}

.nav-search {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  height: 44px;
  margin-bottom: 1rem;
  padding: 0 0.875rem;
  background: rgba(5, 13, 31, 0.6);
  border: 1px solid var(--line);
  transition: border-color var(--transition);
}

.nav-search:focus-within {
  border-color: var(--orange);
}

.nav-search-icon {
  position: relative;
  flex: none;
  width: 14px;
  height: 14px;
  border: 2px solid var(--blue-gray);
  border-radius: 50%;
}

.nav-search-icon::after {
  content: "";
  position: absolute;
  right: -5px;
  bottom: -3px;
  width: 6px;
  height: 2px;
  background: var(--blue-gray);
  transform: rotate(45deg);
}

.nav-search-input {
  flex: 1;
  min-width: 0;
  background: transparent;
  border: 0;
  outline: none;
  color: var(--white);
  font-size: 0.9375rem;
}

.nav-search-input::placeholder {
  color: var(--blue-gray);
}

.nav-search-input::-webkit-search-cancel-button {
  -webkit-appearance: none;
}

.nav-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.625rem;
}

.nav-link {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.75rem 0.875rem;
  background: rgba(18, 58, 107, 0.28);
  border: 1px solid var(--line);
  font-weight: 500;
  font-size: 0.9375rem;
  color: var(--white);
  transition: background var(--transition), border-color var(--transition), transform var(--transition);
}

.nav-link::before {
  content: attr(data-index);
  font-family: var(--font-data);
  font-size: 0.75rem;
  color: var(--green-2);
}

.nav-link::after {
  content: "→";
  margin-left: auto;
  font-size: 0.875rem;
  color: var(--orange);
  opacity: 0;
  transform: translateX(-4px);
  transition: opacity var(--transition), transform var(--transition);
}

.nav-link:hover {
  background: rgba(255, 107, 53, 0.10);
  border-color: rgba(255, 107, 53, 0.65);
  transform: translateY(-1px);
}

.nav-link:hover::after {
  opacity: 1;
  transform: translateX(0);
}

.nav-link[aria-current="page"] {
  background: rgba(255, 107, 53, 0.14);
  border-color: var(--orange);
}

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

.nav-link[aria-current="page"]::after {
  opacity: 1;
}

.nav-empty {
  margin-top: 0.75rem;
  padding: 0.75rem 0.875rem;
  border: 1px dashed var(--line);
  font-family: var(--font-data);
  font-size: 0.8125rem;
  color: var(--blue-gray);
}

.nav-island-foot {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  margin-top: 1rem;
  padding-top: 1rem;
  border-top: 1px solid var(--line);
}

.nav-foot-note {
  font-family: var(--font-data);
  font-size: 0.75rem;
  letter-spacing: 0.12em;
  color: var(--blue-gray);
}

/* ---------- 6. 按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.75rem 1.25rem;
  border: 1px solid transparent;
  font-weight: 600;
  font-size: 0.9375rem;
  line-height: 1.2;
  cursor: pointer;
  transition: background var(--transition), border-color var(--transition), color var(--transition), transform var(--transition);
}

.btn-primary {
  background: var(--orange);
  color: #fff;
}

.btn-primary:hover {
  background: #ff8355;
  transform: translateY(-2px);
}

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

.btn-ghost:hover {
  border-color: var(--orange);
  color: var(--orange);
}

.nav-cta {
  font-family: var(--font-data);
  font-weight: 500;
  letter-spacing: 0.04em;
}

/* ---------- 7. 页脚 ---------- */
.site-footer {
  position: relative;
  z-index: 1;
  margin-top: 6rem;
  background: var(--dark);
  border-top: 1px solid rgba(43, 58, 103, 0.8);
}

.footer-top {
  display: grid;
  grid-template-columns: repeat(12, 1fr);
  gap: 2rem;
  padding: 4rem 0 2rem;
}

.footer-brand {
  grid-column: span 4;
}

.footer-contact {
  grid-column: span 4;
}

.footer-col {
  grid-column: span 2;
}

.footer-logo {
  font-family: var(--font-heading);
  font-size: 1.5rem;
  font-weight: 900;
  line-height: 1.2;
  margin-bottom: 0.875rem;
  color: var(--white);
}

.footer-logo em {
  font-style: normal;
  color: var(--green);
}

.footer-desc {
  margin-bottom: 0.875rem;
  font-size: 0.875rem;
  color: var(--blue-gray);
}

.footer-trust {
  margin-top: 0.5rem;
  padding: 0.875rem 1rem;
  background: rgba(18, 58, 107, 0.25);
  border-left: 2px solid var(--orange);
  font-size: 0.8125rem;
  line-height: 1.7;
  color: var(--blue-gray);
}

.footer-title {
  margin-bottom: 0.875rem;
  font-family: var(--font-heading);
  font-size: 0.875rem;
  font-weight: 900;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--white);
}

.footer-li {
  font-size: 0.875rem;
  line-height: 1.6;
  color: var(--blue-gray);
}

.footer-li + .footer-li {
  margin-top: 0.5rem;
}

.footer-li-note {
  font-size: 0.8125rem;
  color: var(--blue-gray);
}

.footer-link {
  color: var(--blue-gray);
  transition: color var(--transition);
}

.footer-link:hover {
  color: var(--orange);
}

.footer-bottom {
  border-top: 1px solid var(--line);
  padding: 1.25rem 0;
  background: rgba(5, 13, 31, 0.8);
}

.footer-bottom-inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 0.5rem 1rem;
  font-family: var(--font-data);
  font-size: 0.75rem;
  color: var(--blue-gray);
}

/* ---------- 8. 布局与内容组件 ---------- */
.section-head {
  margin-bottom: 2rem;
}

.kicker {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-family: var(--font-data);
  font-size: 0.75rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--green);
}

.kicker::before {
  content: "";
  width: 18px;
  height: 2px;
  background: var(--orange);
}

.section-title {
  margin-top: 0.5rem;
  font-family: var(--font-heading);
  font-size: clamp(1.75rem, 3.5vw, 2.75rem);
  font-weight: 900;
  line-height: 1.15;
  color: var(--white);
}

.section-title .accent {
  color: var(--orange);
}

.lead {
  font-size: 1.125rem;
  color: var(--blue-gray);
}

.grid {
  display: grid;
  gap: 1.25rem;
}

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

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

.card {
  padding: 1.5rem;
  background: var(--navy-deep);
  border: 1px solid var(--line);
  transition: border-color var(--transition), transform var(--transition), background var(--transition);
}

.card:hover {
  border-color: var(--orange);
  transform: translateY(-4px);
}

.tag {
  display: inline-flex;
  align-items: center;
  padding: 0.25rem 0.625rem;
  border: 1px solid var(--line);
  font-family: var(--font-data);
  font-size: 0.6875rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--blue-gray);
}

.tag[data-tone="green"] {
  border-color: rgba(0, 230, 118, 0.4);
  color: var(--green);
}

.tag[data-tone="orange"] {
  border-color: rgba(255, 107, 53, 0.4);
  color: var(--orange);
}

.data-chip {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.25rem 0.625rem;
  background: rgba(18, 58, 107, 0.5);
  border: 1px solid var(--line);
  font-family: var(--font-data);
  font-size: 0.75rem;
  font-weight: 500;
  line-height: 1.6;
  color: var(--white);
}

.data-chip[data-tone="green"] {
  border-color: rgba(0, 230, 118, 0.4);
  color: var(--green);
}

.data-chip[data-tone="orange"] {
  border-color: rgba(255, 107, 53, 0.4);
  color: var(--orange);
}

.media-frame {
  position: relative;
  overflow: hidden;
  aspect-ratio: 16 / 9;
  background: var(--dark);
}

.media-frame[data-ratio="4/3"] {
  aspect-ratio: 4 / 3;
}

.media-frame[data-ratio="1/1"] {
  aspect-ratio: 1 / 1;
}

.media-frame::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(5, 13, 31, 0.65), rgba(18, 58, 107, 0.15) 55%, rgba(255, 107, 53, 0.08));
  pointer-events: none;
}

.media-frame > img,
.media-frame > video {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.media-frame > [data-media] {
  width: 100%;
  height: 100%;
  background-color: var(--navy-deep);
  background-size: cover;
  background-position: center;
}

.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.5rem;
  margin-bottom: 2rem;
  font-family: var(--font-data);
  font-size: 0.8125rem;
  color: var(--blue-gray);
}

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

.breadcrumb-item + .breadcrumb-item::before {
  content: "/";
  color: var(--line);
}

.breadcrumb-item a {
  color: var(--blue-gray);
  transition: color var(--transition);
}

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

.breadcrumb-item[aria-current="page"] {
  color: var(--white);
}

/* ---------- 9. 手风琴 ---------- */
.accordion {
  border: 1px solid var(--line);
  background: rgba(18, 58, 107, 0.22);
}

.accordion + .accordion {
  border-top: 0;
}

.accordion-trigger {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  width: 100%;
  padding: 1.125rem 1.25rem;
  font-family: var(--font-heading);
  font-size: 1rem;
  font-weight: 900;
  text-align: left;
  color: var(--white);
  transition: color var(--transition);
}

.accordion-trigger:hover,
.accordion-trigger[aria-expanded="true"] {
  color: var(--orange);
}

.accordion-icon {
  flex: none;
  width: 10px;
  height: 10px;
  border-right: 2px solid var(--orange);
  border-bottom: 2px solid var(--orange);
  transform: rotate(45deg);
  transition: transform var(--transition);
}

.accordion-trigger[aria-expanded="true"] .accordion-icon {
  transform: rotate(225deg);
}

.accordion-panel {
  padding: 0 1.25rem 1.25rem;
  background: rgba(5, 13, 31, 0.2);
  font-size: 0.9375rem;
  line-height: 1.75;
  color: var(--blue-gray);
}

/* ---------- 10. 滚动显现 ---------- */
html.js [data-reveal] {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity 0.5s ease, transform 0.5s ease;
}

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

/* ---------- 11. 平板适配 ---------- */
@media (max-width: 1024px) {
  .footer-brand,
  .footer-contact {
    grid-column: span 6;
  }

  .footer-col {
    grid-column: span 3;
  }

  .grid-3 {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

/* ---------- 12. 移动端适配 ---------- */
@media (max-width: 720px) {
  .site-header {
    width: calc(100% - 1rem);
  }

  .header-pill {
    padding-left: 0.75rem;
  }

  .brand-text {
    font-size: 0.8125rem;
  }

  .online-badge {
    display: none;
  }

  .site-nav {
    top: calc(100% + 0.5rem);
  }

  .nav-island {
    width: 100%;
    padding: 0.875rem;
  }

  .nav-grid {
    grid-template-columns: 1fr;
    gap: 0.5rem;
  }

  .nav-island-foot {
    flex-direction: column;
    align-items: stretch;
  }

  .nav-cta {
    width: 100%;
  }

  .footer-top {
    grid-template-columns: 1fr;
    gap: 1.5rem;
    padding-top: 2.5rem;
  }

  .footer-brand,
  .footer-contact,
  .footer-col {
    grid-column: 1 / -1;
  }

  .footer-bottom-inner {
    flex-direction: column;
    align-items: flex-start;
  }

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

/* ---------- 13. 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;
  }

  .online-dot {
    animation: none;
  }

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