/* ============ BSPORT体育網 Shared Foundation ============ */

:root {
  --c-bg: #0A0E1A;
  --c-bg-deep: #060810;
  --c-bg-panel: #121A2C;
  --c-accent: #00FF66;
  --c-accent-2: #FF6A00;
  --c-accent-3: #F9C74F;
  --c-text: #E8F0FF;
  --c-text-dim: #9AA8C0;
  --c-border: rgba(154, 168, 192, 0.16);
  --c-border-strong: rgba(0, 255, 102, 0.45);

  --font-head: "Arial Narrow", "DIN Condensed", "Oswald", "Roboto Condensed", "Impact", "Arial Black", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  --font-body: "PingFang SC", "Hiragino Sans GB", "Source Han Sans SC", "Noto Sans SC", "Microsoft YaHei", sans-serif;
  --font-data: "Roboto Mono", "JetBrains Mono", "SF Mono", "Cascadia Mono", Consolas, monospace;

  --space-1: 4px;
  --space-2: 8px;
  --space-3: 12px;
  --space-4: 16px;
  --space-5: 24px;
  --space-6: 32px;
  --space-7: 48px;
  --space-8: 64px;
  --space-9: 96px;

  --radius-xs: 2px;
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --radius-pill: 999px;

  --container: 1200px;
  --header-h: 80px;
  --ease-out: cubic-bezier(0.22, 1, 0.36, 1);
  --shadow-panel: 0 16px 48px rgba(0, 0, 0, 0.45);
}

/* ---------- Reset & Base ---------- */

*,
*::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: 16px;
  line-height: 1.65;
  color: var(--c-text);
  background-color: var(--c-bg);
  background-image:
    linear-gradient(rgba(154, 168, 192, 0.045) 1px, transparent 1px),
    linear-gradient(90deg, rgba(154, 168, 192, 0.045) 1px, transparent 1px);
  background-size: 44px 44px;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

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

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

a:hover {
  color: var(--c-accent-3);
}

ul,
ol {
  list-style: none;
}

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

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

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

::selection {
  background: rgba(0, 255, 102, 0.25);
  color: var(--c-text);
}

/* ---------- Typography ---------- */

h1,
h2,
h3,
h4 {
  font-family: var(--font-head);
  font-weight: 800;
  line-height: 1.15;
  letter-spacing: 0.02em;
  color: var(--c-text);
}

h1 {
  font-size: clamp(30px, 5vw, 52px);
}

h2 {
  font-size: clamp(26px, 4vw, 40px);
}

h3 {
  font-size: clamp(20px, 2.6vw, 26px);
}

h4 {
  font-size: 18px;
}

/* ---------- Layout Utilities ---------- */

.container {
  width: 100%;
  max-width: var(--container);
  margin-inline: auto;
  padding-inline: var(--space-5);
}

.section {
  padding-block: var(--space-8);
  position: relative;
}

.section-head {
  margin-bottom: var(--space-6);
  max-width: 720px;
}

.section-label {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-family: var(--font-data);
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--c-accent);
}

.section-label::before {
  content: "";
  width: 18px;
  height: 1px;
  background: var(--c-accent-2);
}

.section-title {
  margin: var(--space-2) 0 var(--space-3);
}

.section-desc {
  color: var(--c-text-dim);
  font-size: 16px;
  max-width: 60ch;
}

.index-num {
  font-family: var(--font-data);
  font-size: 13px;
  letter-spacing: 0.1em;
  color: var(--c-text-dim);
}

.coord-label {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-data);
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--c-text-dim);
  text-transform: uppercase;
}

.coord-label::before {
  content: "+";
  color: var(--c-accent);
  font-size: 14px;
  line-height: 1;
}

#main-content {
  scroll-margin-top: calc(var(--header-h) + var(--space-4));
}

.page-main {
  flex: 1 0 auto;
  width: 100%;
  padding-top: calc(var(--header-h) + var(--space-5));
}

/* ---------- Grid ---------- */

.grid {
  display: grid;
  gap: var(--space-5);
}

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

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

.grid-4 {
  grid-template-columns: repeat(4, minmax(0, 1fr));
}

@media (max-width: 999px) {
  .grid-3,
  .grid-4 {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 600px) {
  .grid-2,
  .grid-3,
  .grid-4 {
    grid-template-columns: 1fr;
  }
}

/* ---------- Panel ---------- */

.panel {
  position: relative;
  overflow: hidden;
  background: linear-gradient(160deg, rgba(18, 26, 44, 0.85), rgba(10, 14, 26, 0.92));
  border: 1px solid var(--c-border);
  border-radius: var(--radius-md);
  padding: var(--space-5);
  box-shadow: var(--shadow-panel);
}

.panel::before {
  content: "";
  position: absolute;
  top: 10px;
  left: 10px;
  width: 14px;
  height: 14px;
  border-top: 2px solid rgba(0, 255, 102, 0.6);
  border-left: 2px solid rgba(0, 255, 102, 0.6);
  pointer-events: none;
}

.panel::after {
  content: "";
  position: absolute;
  right: 10px;
  bottom: 10px;
  width: 14px;
  height: 14px;
  border-right: 2px solid rgba(255, 106, 0, 0.45);
  border-bottom: 2px solid rgba(255, 106, 0, 0.45);
  pointer-events: none;
}

.panel-head {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: var(--space-3);
  padding-bottom: var(--space-3);
  border-bottom: 1px solid var(--c-border);
  margin-bottom: var(--space-4);
}

.panel-title {
  font-size: 16px;
  font-weight: 700;
  letter-spacing: 0.04em;
}

.panel-body {
  color: var(--c-text-dim);
  font-size: 15px;
}

/* ---------- Buttons ---------- */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 24px;
  border: 1px solid transparent;
  border-radius: var(--radius-sm);
  font-size: 15px;
  font-weight: 700;
  line-height: 1;
  letter-spacing: 0.02em;
  cursor: pointer;
  transition: transform 0.18s var(--ease-out), box-shadow 0.22s var(--ease-out), background-color 0.22s, border-color 0.22s, color 0.22s;
}

.btn-primary {
  background: var(--c-accent);
  color: #060810;
}

.btn-primary:hover {
  box-shadow: 0 6px 28px rgba(0, 255, 102, 0.32);
  transform: translateY(-2px);
  color: #060810;
}

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

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

.btn-warn {
  background: var(--c-accent-2);
  color: #060810;
}

.btn-warn:hover {
  box-shadow: 0 6px 26px rgba(255, 106, 0, 0.3);
  transform: translateY(-2px);
  color: #060810;
}

/* ---------- Badges & Data ---------- */

.badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 12px;
  border-radius: var(--radius-pill);
  font-family: var(--font-data);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.06em;
  white-space: nowrap;
  background: rgba(0, 255, 102, 0.1);
  border: 1px solid rgba(0, 255, 102, 0.28);
  color: var(--c-accent);
}

.badge-warn {
  background: rgba(255, 106, 0, 0.1);
  border-color: rgba(255, 106, 0, 0.3);
  color: var(--c-accent-2);
}

.badge-henan {
  background: rgba(249, 199, 79, 0.1);
  border-color: rgba(249, 199, 79, 0.3);
  color: var(--c-accent-3);
}

.data-num {
  font-family: var(--font-data);
  font-size: 1.6em;
  font-weight: 500;
  font-variant-numeric: tabular-nums;
  letter-spacing: -0.02em;
  color: var(--c-text);
}

.data-num.is-accent {
  color: var(--c-accent);
}

/* ---------- Breadcrumb ---------- */

.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-4) 0;
  font-size: 14px;
  color: var(--c-text-dim);
}

.breadcrumb a {
  color: var(--c-text-dim);
}

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

.breadcrumb li + li::before {
  content: "/";
  margin-right: var(--space-2);
  color: rgba(154, 168, 192, 0.4);
}

/* ---------- Image Frame ---------- */

.img-frame {
  position: relative;
  display: block;
  width: 100%;
  aspect-ratio: var(--ratio, 16 / 9);
  overflow: hidden;
  background-color: var(--c-bg-panel);
  background-image: linear-gradient(115deg, rgba(154, 168, 192, 0.08) 25%, rgba(0, 255, 102, 0.06) 50%, rgba(154, 168, 192, 0.08) 75%);
  border: 1px solid var(--c-border);
  border-radius: var(--radius-md);
}

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

.img-frame::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(115deg, transparent 32%, rgba(0, 255, 102, 0.07) 50%, transparent 68%);
  pointer-events: none;
}

/* ---------- Reveal ---------- */

.reveal {
  opacity: 0;
  transform: translateY(26px);
  transition: opacity 0.6s var(--ease-out), transform 0.6s var(--ease-out);
}

.reveal.is-revealed {
  opacity: 1;
  transform: none;
}

/* ---------- Skip Link ---------- */

.skip-link {
  position: fixed;
  top: var(--space-3);
  left: var(--space-4);
  z-index: 200;
  padding: 10px 18px;
  border-radius: var(--radius-sm);
  background: var(--c-accent);
  color: #060810;
  font-size: 14px;
  font-weight: 700;
  box-shadow: 0 8px 24px rgba(0, 255, 102, 0.35);
  transform: translateY(-160%);
  transition: transform 0.25s var(--ease-out);
  pointer-events: auto;
}

.skip-link:focus {
  transform: none;
}

/* ---------- Header / Floating Capsule Nav ---------- */

.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  padding: var(--space-3) var(--space-5);
  pointer-events: none;
}

.nav-shell {
  max-width: var(--container);
  margin: 0 auto;
}

.nav-capsule {
  position: relative;
  display: flex;
  align-items: center;
  gap: var(--space-4);
  padding: 8px 10px 8px 16px;
  background: rgba(10, 14, 26, 0.84);
  border: 1px solid var(--c-border);
  border-radius: var(--radius-pill);
  box-shadow: 0 16px 44px rgba(0, 0, 0, 0.5), inset 0 1px 0 rgba(232, 240, 255, 0.05);
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
  pointer-events: auto;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
}

.brand:hover .brand-name strong {
  color: var(--c-accent);
}

.brand-mark {
  display: grid;
  place-items: center;
  width: 38px;
  height: 38px;
  background: linear-gradient(135deg, var(--c-accent), #00cc55);
  border-radius: 9px 3px 9px 3px;
  color: #060810;
  font-family: var(--font-head);
  font-size: 16px;
  font-weight: 900;
  letter-spacing: 0.02em;
  line-height: 1;
}

.brand-name {
  display: flex;
  flex-direction: column;
  line-height: 1;
}

.brand-name strong {
  font-family: var(--font-head);
  font-size: 20px;
  font-weight: 800;
  letter-spacing: 0.06em;
  color: var(--c-text);
}

.brand-name small {
  margin-top: 4px;
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 0.42em;
  color: var(--c-accent-3);
}

.site-nav {
  flex: 1;
  display: flex;
  justify-content: center;
}

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

.nav-link {
  display: inline-flex;
  align-items: center;
  padding: 9px 14px;
  border-radius: var(--radius-pill);
  font-size: 15px;
  font-weight: 500;
  white-space: nowrap;
  color: var(--c-text-dim);
  transition: background-color 0.2s, color 0.2s, box-shadow 0.2s;
}

.nav-link:hover {
  background: rgba(232, 240, 255, 0.07);
  color: var(--c-text);
}

.nav-link[aria-current="page"] {
  background: var(--c-accent);
  color: #060810;
  font-weight: 700;
  box-shadow: 0 4px 18px rgba(0, 255, 102, 0.28);
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  margin-left: auto;
  flex-shrink: 0;
}

.nav-search {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  padding: 8px 16px;
  border: 1px solid var(--c-border);
  border-radius: var(--radius-pill);
  font-size: 13px;
  font-weight: 500;
  color: var(--c-text-dim);
  transition: border-color 0.2s, color 0.2s, box-shadow 0.2s;
}

.nav-search:hover {
  border-color: var(--c-accent);
  color: var(--c-accent);
  box-shadow: 0 0 14px rgba(0, 255, 102, 0.12);
}

.nav-search-icon {
  position: relative;
  display: block;
  width: 13px;
  height: 13px;
  border: 1.6px solid currentColor;
  border-radius: 50%;
  flex-shrink: 0;
}

.nav-search-icon::before {
  content: "";
  position: absolute;
  right: -4px;
  bottom: -3px;
  width: 6px;
  height: 1.8px;
  background: currentColor;
  transform: rotate(45deg);
  transform-origin: left center;
}

.nav-toggle {
  display: none;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 5px;
  width: 44px;
  height: 44px;
  border: 1px solid var(--c-border);
  border-radius: var(--radius-pill);
  transition: border-color 0.2s;
}

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

.nav-toggle-bar {
  display: block;
  width: 16px;
  height: 2px;
  border-radius: 2px;
  background: var(--c-text);
  transition: transform 0.28s var(--ease-out), opacity 0.2s;
}

.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);
}

/* ---------- Scroll Progress ---------- */

.progress-track {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: rgba(232, 240, 255, 0.06);
  pointer-events: none;
}

.progress-bar {
  display: block;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, var(--c-accent), var(--c-accent-3) 55%, var(--c-accent-2));
  transform: scaleX(0);
  transform-origin: 0 50%;
}

/* ---------- Back to Top ---------- */

.back-to-top {
  position: fixed;
  right: 22px;
  bottom: 22px;
  z-index: 120;
  width: 46px;
  height: 46px;
  display: grid;
  place-items: center;
  border: 1px solid var(--c-border);
  border-radius: var(--radius-sm);
  background: rgba(18, 26, 44, 0.92);
  color: var(--c-accent);
  box-shadow: 0 10px 28px rgba(0, 0, 0, 0.5);
  opacity: 0;
  visibility: hidden;
  transform: translateY(12px);
  transition: opacity 0.25s, transform 0.25s var(--ease-out), visibility 0.25s, border-color 0.2s, box-shadow 0.2s;
  cursor: pointer;
  pointer-events: auto;
}

.back-to-top::before {
  content: "";
  width: 10px;
  height: 10px;
  border-top: 2px solid currentColor;
  border-left: 2px solid currentColor;
  transform: rotate(45deg);
  margin-top: 5px;
}

.back-to-top:hover {
  border-color: var(--c-accent);
  box-shadow: 0 0 22px rgba(0, 255, 102, 0.22);
}

.back-to-top.is-visible {
  opacity: 1;
  visibility: visible;
  transform: none;
}

/* ---------- Mobile Nav ---------- */

@media (max-width: 999px) {
  .site-header {
    padding: var(--space-2) var(--space-3);
  }

  .nav-capsule {
    padding: 8px 8px 8px 14px;
    border-radius: var(--radius-lg);
  }

  .nav-toggle {
    display: inline-flex;
  }

  .nav-search {
    display: none;
  }

  .site-nav {
    position: absolute;
    top: calc(100% + 8px);
    left: 0;
    right: 0;
    flex-direction: column;
    align-items: stretch;
    padding: var(--space-3);
    background: rgba(6, 8, 16, 0.97);
    border: 1px solid var(--c-border);
    border-radius: var(--radius-lg);
    box-shadow: 0 20px 50px rgba(0, 0, 0, 0.6);
    opacity: 0;
    visibility: hidden;
    transform: translateY(-8px);
    transition: opacity 0.22s var(--ease-out), transform 0.22s var(--ease-out), visibility 0.22s;
  }

  .site-nav[data-open] {
    opacity: 1;
    visibility: visible;
    transform: none;
  }

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

  .nav-link {
    justify-content: flex-start;
    padding: 13px 16px;
    border-radius: var(--radius-sm);
    font-size: 16px;
  }

  .nav-link[aria-current="page"] {
    background: rgba(0, 255, 102, 0.12);
    color: var(--c-accent);
    box-shadow: none;
  }
}

/* ---------- Footer ---------- */

.site-footer {
  position: relative;
  margin-top: auto;
  padding-top: var(--space-8);
  background-color: var(--c-bg-deep);
  background-image: radial-gradient(ellipse 60% 80% at 20% 0%, rgba(249, 199, 79, 0.06), transparent 60%);
  border-top: 1px solid rgba(154, 168, 192, 0.14);
}

.site-footer::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--c-accent) 0%, transparent 25%, transparent 70%, var(--c-accent-2) 100%);
  opacity: 0.55;
}

.footer-grid {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 var(--space-5);
  display: grid;
  grid-template-columns: 2.2fr 1fr 1fr 1.4fr;
  gap: var(--space-7);
}

.footer-brand .brand {
  margin-bottom: var(--space-4);
}

.footer-claim {
  max-width: 42ch;
  margin-bottom: var(--space-4);
  font-size: 14px;
  color: var(--c-text-dim);
}

.footer-locale {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-data);
  font-size: 12px;
  letter-spacing: 0.12em;
  color: var(--c-accent-3);
}

.footer-locale::before {
  content: "";
  width: 8px;
  height: 8px;
  background: var(--c-accent-3);
  border-radius: 2px;
  transform: rotate(45deg);
}

.footer-title {
  font-family: var(--font-data);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--c-accent);
  margin-bottom: var(--space-4);
  padding-bottom: var(--space-2);
  border-bottom: 1px solid rgba(154, 168, 192, 0.14);
}

.footer-links {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.footer-links a {
  display: inline-block;
  padding: 4px 0;
  font-size: 14px;
  color: var(--c-text-dim);
  transition: color 0.2s, transform 0.2s var(--ease-out);
}

.footer-links a:hover {
  color: var(--c-accent);
  transform: translateX(4px);
}

.footer-contact-list {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.footer-contact-list li {
  display: flex;
  gap: 10px;
  font-size: 14px;
  line-height: 1.5;
  color: var(--c-text-dim);
}

.contact-label {
  flex-shrink: 0;
  min-width: 44px;
  font-family: var(--font-data);
  font-size: 12px;
  letter-spacing: 0.04em;
  color: var(--c-accent-3);
}

.footer-bottom {
  max-width: var(--container);
  margin: var(--space-7) auto 0;
  padding: var(--space-4) var(--space-5);
  border-top: 1px solid rgba(154, 168, 192, 0.1);
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: center;
  gap: var(--space-3);
  font-size: 13px;
  color: var(--c-text-dim);
}

.footer-copyright {
  letter-spacing: 0.03em;
}

.footer-icp {
  font-family: var(--font-data);
  letter-spacing: 0.04em;
}

@media (max-width: 999px) {
  .footer-grid {
    grid-template-columns: 1fr 1fr;
    gap: var(--space-6);
  }
}

@media (max-width: 600px) {
  .site-footer {
    padding-top: var(--space-6);
  }

  .footer-grid {
    grid-template-columns: 1fr;
    gap: var(--space-6);
  }

  .footer-bottom {
    flex-direction: column;
    text-align: center;
  }
}

/* ---------- Reduced Motion ---------- */

@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: 0ms !important;
    scroll-behavior: auto !important;
  }

  .reveal {
    opacity: 1;
    transform: none;
  }
}