/* =============================
   /assets/site.css
   JNH Sports Global Theme
   ============================= */

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

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

body {
  font-family: Arial, "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
  background: #F5F0E6;
  color: #0A1F44;
  line-height: 1.6;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

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

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

button,
input,
select,
textarea {
  font: inherit;
  color: inherit;
  background: none;
  border: none;
  appearance: none;
  -webkit-appearance: none;
}

:focus-visible {
  outline: 3px solid #FFA500;
  outline-offset: 2px;
  border-radius: 2px;
}

::selection {
  background: #0A1F44;
  color: #F5F0E6;
}

/* ----- CSS Variables ----- */
:root {
  --paper: #F5F0E6;
  --ink: #0A1F44;
  --accent: #FFA500;
  --secondary-accent: #C0392B;
  --gray: #3E4A5B;
  --line: #D8D3C8;
  --white: #FFFFFF;
  --highlight: #F1C40F;

  --font-body: Arial, "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
  --font-heading: Georgia, "Times New Roman", "Songti SC", "SimSun", serif;
  --font-display: Impact, "Arial Narrow Bold", "Helvetica Neue", Arial, sans-serif;

  --shadow-sm: 0 1px 3px rgba(10, 31, 68, 0.08);
  --shadow-md: 0 6px 16px rgba(10, 31, 68, 0.14);

  --container-max: 1200px;
  --radius: 2px;
}

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

.container {
  max-width: var(--container-max);
  margin-inline: auto;
  padding-inline: 1.25rem;
}

/* ----- Skip Link ----- */
.skip-link {
  position: fixed;
  top: -100%;
  left: 1rem;
  z-index: 2000;
  background: var(--ink);
  color: var(--paper);
  padding: 0.75rem 1.5rem;
  font-weight: 700;
  font-size: 0.875rem;
  border-radius: 0 0 4px 4px;
  transition: top 0.2s ease;
}

.skip-link:focus-visible {
  top: 0;
  color: var(--paper);
}

/* ----- Scroll Progress Bar ----- */
.progress-bar {
  position: fixed;
  top: 0;
  left: 0;
  height: 3px;
  width: 0%;
  background: var(--accent);
  z-index: 1500;
  pointer-events: none;
  transition: width 0.08s ease-out;
}

@media (prefers-reduced-motion: reduce) {
  .progress-bar {
    display: none;
  }
}

/* ----- Header Top Meta Bar ----- */
.site-header {
  background: var(--ink);
  color: var(--paper);
}

.header-meta {
  background: var(--accent);
  color: var(--ink);
  position: relative;
  overflow: hidden;
}

.header-meta::after {
  content: "";
  position: absolute;
  right: -3rem;
  top: 0;
  bottom: 0;
  width: 8rem;
  background: var(--ink);
  transform: skewX(-30deg);
  opacity: 0.92;
  pointer-events: none;
}

.header-meta-inner {
  position: relative;
  z-index: 1;
  display: flex;
  align-items: center;
  gap: 0.625rem;
  min-height: 1.75rem;
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.header-meta-sep {
  width: 5px;
  height: 5px;
  background: var(--ink);
  transform: rotate(45deg);
  flex: 0 0 auto;
}

/* ----- Header Brand Block ----- */
.header-main {
  background: var(--ink);
  padding: 1.75rem 0 0;
}

.header-main-inner {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
}

.brand-link {
  display: inline-flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  padding: 0.25rem 1.5rem 1.5rem;
  margin: 0 auto;
  position: relative;
  transition: opacity 0.2s ease;
}

.brand-link:hover {
  opacity: 0.92;
}

.brand-cn {
  font-family: var(--font-heading);
  font-size: clamp(1.5rem, 4.5vw, 2.75rem);
  font-weight: 700;
  letter-spacing: 0.06em;
  line-height: 1.25;
  color: var(--paper);
  text-shadow: 0 2px 0 rgba(255, 165, 0, 0.35);
}

.brand-en {
  font-family: var(--font-body);
  font-size: 0.6875rem;
  letter-spacing: 0.35em;
  text-transform: uppercase;
  color: var(--accent);
  margin-top: 0.375rem;
  padding-left: 0.35em;
  font-weight: 700;
}

/* ----- Navigation Toggle (Mobile) ----- */
.nav-toggle {
  position: absolute;
  right: 0.75rem;
  top: 50%;
  transform: translateY(-50%);
  display: none;
  align-items: center;
  gap: 0.5rem;
  border: 1px solid rgba(245, 240, 230, 0.3);
  border-radius: var(--radius);
  padding: 0.5rem 0.625rem;
  color: var(--paper);
  font-size: 0.8125rem;
  font-weight: 700;
  cursor: pointer;
  z-index: 20;
  transition: border-color 0.2s ease, background 0.2s ease;
}

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

.nav-toggle-box {
  width: 1.125rem;
  height: 0.8125rem;
  display: inline-flex;
  flex-direction: column;
  justify-content: space-between;
}

.nav-toggle-line {
  display: block;
  height: 2px;
  background: currentColor;
  border-radius: 2px;
  transition: transform 0.2s ease, opacity 0.2s ease;
}

.nav-toggle[aria-expanded="true"] .nav-toggle-line:nth-child(1) {
  transform: translateY(0.34375rem) rotate(45deg);
}

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

.nav-toggle[aria-expanded="true"] .nav-toggle-line:nth-child(3) {
  transform: translateY(-0.34375rem) rotate(-45deg);
}

/* ----- Site Navigation ----- */
.site-nav {
  background: var(--ink);
  border-top: 1px solid rgba(245, 240, 230, 0.12);
}

.nav-container {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 0.25rem;
}

.nav-link {
  position: relative;
  display: block;
  padding: 0.875rem 1.25rem;
  color: var(--paper);
  font-family: var(--font-body);
  font-size: 0.875rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  transition: color 0.2s ease;
}

.nav-link::after {
  content: "";
  position: absolute;
  left: 1.25rem;
  right: 1.25rem;
  bottom: 0.375rem;
  height: 2px;
  background: var(--accent);
  transform: skewX(-30deg) scaleX(0);
  transform-origin: left center;
  transition: transform 0.2s ease;
}

.nav-link:hover,
.nav-link:focus-visible {
  color: var(--accent);
}

.nav-link:hover::after,
.nav-link:focus-visible::after,
.nav-link[aria-current="page"]::after {
  transform: skewX(-30deg) scaleX(1);
}

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

/* ----- Mobile Nav Behavior ----- */
@media (max-width: 767px) {
  .nav-toggle {
    display: inline-flex;
  }

  .header-main {
    padding-bottom: 0.75rem;
  }

  .header-main-inner {
    justify-content: flex-start;
  }

  .brand-link {
    margin: 0;
    align-items: flex-start;
    padding: 0.25rem 0 0.5rem;
    padding-right: 5rem;
  }

  .site-nav {
    display: none;
  }

  .site-nav[data-open="true"] {
    display: block;
  }

  .nav-container {
    flex-direction: column;
    align-items: stretch;
    padding: 0.5rem 0 0.75rem;
  }

  .nav-link {
    border-bottom: 1px solid rgba(245, 240, 230, 0.08);
  }

  .nav-link::after {
    left: 1rem;
    right: auto;
    width: 2rem;
    bottom: auto;
    top: 50%;
    height: 2px;
    transform: translateY(-50%) scaleX(0);
    transform-origin: left center;
  }

  .nav-link:hover::after,
  .nav-link[aria-current="page"]::after {
    transform: translateY(-50%) scaleX(1);
  }
}

@media (min-width: 768px) {
  .nav-toggle {
    display: none;
  }

  .site-nav {
    display: block;
  }
}

/* ----- Footer ----- */
.site-footer {
  background: var(--ink);
  color: var(--paper);
  margin-top: auto;
  border-top: 4px solid var(--accent);
  padding: 3rem 0 0;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.6fr 1fr 1fr 1.3fr;
  gap: 2.5rem 2rem;
  padding-bottom: 2.5rem;
}

.footer-brand-mark {
  display: inline-block;
  font-family: var(--font-heading);
  font-size: 2rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  color: var(--paper);
  line-height: 1.3;
  margin-bottom: 0.875rem;
  padding-bottom: 0.25rem;
  border-bottom: 2px solid var(--accent);
}

.footer-trust {
  font-family: var(--font-body);
  font-size: 0.875rem;
  line-height: 1.75;
  color: rgba(245, 240, 230, 0.7);
  max-width: 30ch;
}

.footer-nav-col,
.footer-contact-col {
  display: flex;
  flex-direction: column;
}

.footer-title {
  display: inline-block;
  align-self: flex-start;
  background: var(--accent);
  color: var(--ink);
  font-family: var(--font-body);
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  padding: 0.25rem 0.75rem 0.25rem 1rem;
  clip-path: polygon(0 0, 100% 0, calc(100% - 0.375rem) 100%, 0% 100%);
  margin-bottom: 1.125rem;
}

.footer-nav-col a,
.footer-contact-item {
  display: block;
  padding: 0.3125rem 0;
  color: rgba(245, 240, 230, 0.78);
  font-family: var(--font-body);
  font-size: 0.875rem;
  line-height: 1.6;
  transition: color 0.2s ease, transform 0.2s ease;
}

.footer-nav-col a:hover,
.footer-nav-col a:focus-visible {
  color: var(--accent);
  transform: translateX(0.25rem);
}

.footer-bottom {
  border-top: 1px solid rgba(245, 240, 230, 0.14);
  padding: 1.25rem 0;
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 0.5rem 1rem;
  font-family: var(--font-body);
  font-size: 0.75rem;
  color: rgba(245, 240, 230, 0.6);
}

@media (max-width: 900px) {
  .footer-grid {
    grid-template-columns: 1fr 1fr;
    gap: 2rem;
  }
}

@media (max-width: 480px) {
  .footer-grid {
    grid-template-columns: 1fr;
    gap: 1.75rem;
  }
}

/* ----- Top Link ----- */
.top-link {
  position: fixed;
  bottom: 1.25rem;
  right: 1.25rem;
  width: 2.75rem;
  height: 2.75rem;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--ink);
  color: var(--paper);
  border: 1px solid var(--accent);
  border-radius: var(--radius);
  font-size: 1.125rem;
  font-weight: 700;
  opacity: 0;
  visibility: hidden;
  transform: translateY(1rem);
  transition: opacity 0.3s ease, transform 0.3s ease, visibility 0.3s ease;
  z-index: 1400;
}

.top-link[data-visible="true"] {
  opacity: 1;
  visibility: visible;
  transform: none;
}

.top-link:hover,
.top-link:focus-visible {
  background: var(--accent);
  color: var(--ink);
}

/* ----- Page Building Blocks ----- */
.section {
  padding: 3.5rem 0;
}

.section-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  flex-wrap: wrap;
  margin-bottom: 2rem;
}

.section-title {
  font-family: var(--font-heading);
  font-size: clamp(1.375rem, 2.5vw, 2rem);
  font-weight: 700;
  color: var(--ink);
  display: flex;
  align-items: center;
  gap: 0.75rem;
  line-height: 1.3;
}

.section-title::before {
  content: "";
  display: inline-block;
  width: 0.375rem;
  height: 1.5em;
  background: var(--accent);
  transform: skewX(-15deg);
  flex: 0 0 auto;
}

.section-subtitle {
  font-family: var(--font-body);
  font-size: 0.875rem;
  color: var(--gray);
  max-width: 65ch;
}

/* ----- Grid ----- */
.grid {
  display: grid;
  gap: 1.5rem;
}

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

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

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

.grid-1-2 {
  grid-template-columns: 1fr 1.2fr;
}

@media (max-width: 900px) {
  .grid-3,
  .grid-4 {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 640px) {
  .grid-2,
  .grid-3,
  .grid-4,
  .grid-1-2 {
    grid-template-columns: 1fr;
  }
}

/* ----- Card ----- */
.card {
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 1.5rem;
  box-shadow: 0 1px 2px rgba(10, 31, 68, 0.04), 0 6px 16px rgba(10, 31, 68, 0.05);
  transition: box-shadow 0.25s ease, transform 0.25s ease;
}

.card:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}

.card-title {
  font-family: var(--font-heading);
  font-size: 1.125rem;
  font-weight: 700;
  color: var(--ink);
  margin-bottom: 0.5rem;
  line-height: 1.4;
}

.card-text {
  font-family: var(--font-body);
  font-size: 0.875rem;
  color: var(--gray);
  line-height: 1.7;
}

.card-meta {
  margin-top: 1rem;
  font-family: var(--font-body);
  font-size: 0.75rem;
  color: var(--gray);
  display: flex;
  align-items: center;
  gap: 0.5rem;
  flex-wrap: wrap;
}

/* ----- Tag ----- */
.tag {
  display: inline-block;
  background: var(--accent);
  color: var(--ink);
  font-family: var(--font-body);
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  line-height: 1.5;
  padding: 0.1875rem 0.75rem;
  clip-path: polygon(0 0, 100% 0, calc(100% - 0.5rem) 100%, 0% 100%);
}

.tag-dark {
  background: var(--ink);
  color: var(--paper);
}

.tag-red {
  background: var(--secondary-accent);
  color: var(--white);
}

/* ----- Button ----- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  background: var(--ink);
  color: var(--paper);
  border: 1px solid var(--ink);
  border-radius: var(--radius);
  padding: 0.625rem 1.5rem;
  font-family: var(--font-body);
  font-size: 0.875rem;
  font-weight: 700;
  line-height: 1.4;
  cursor: pointer;
  transition: background 0.2s ease, border-color 0.2s ease, color 0.2s ease, transform 0.2s ease;
}

.btn:hover,
.btn:focus-visible {
  background: var(--accent);
  border-color: var(--accent);
  color: var(--ink);
  transform: translateY(-1px);
}

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

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

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

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

/* ----- Breadcrumb ----- */
.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.5rem;
  padding: 0.875rem 0;
  font-family: var(--font-body);
  font-size: 0.8125rem;
  color: var(--gray);
}

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

.breadcrumb-sep {
  color: var(--line);
  font-size: 0.75rem;
}

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

/* ----- Prose / Article Body ----- */
.prose {
  font-family: var(--font-body);
  font-size: 1rem;
  line-height: 1.9;
  color: var(--gray);
  max-width: 68ch;
}

.prose h1,
.prose h2,
.prose h3 {
  font-family: var(--font-heading);
  color: var(--ink);
  line-height: 1.35;
  margin-top: 2em;
  margin-bottom: 0.6em;
}

.prose h1 {
  font-size: 2rem;
}

.prose h2 {
  font-size: 1.5rem;
}

.prose h3 {
  font-size: 1.25rem;
}

.prose p {
  margin-bottom: 1.25em;
}

.prose ul,
.prose ol {
  margin-bottom: 1.25em;
  padding-left: 1.5em;
}

.prose li {
  margin-bottom: 0.375em;
}

.prose a {
  color: var(--accent);
  font-weight: 700;
  text-decoration: underline;
  text-underline-offset: 3px;
}

.prose blockquote {
  border-left: 4px solid var(--accent);
  padding-left: 1.25rem;
  margin: 1.5rem 0;
  color: var(--ink);
  font-style: italic;
}

/* ----- Image Placeholder ----- */
.img-placeholder {
  position: relative;
  display: block;
  width: 100%;
  background: var(--line);
  overflow: hidden;
  aspect-ratio: 16 / 9;
  border-radius: var(--radius);
}

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

.img-placeholder--portrait {
  aspect-ratio: 3 / 4;
}

.img-placeholder--wide {
  aspect-ratio: 21 / 9;
}

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

/* ----- Timeline ----- */
.timeline {
  position: relative;
  padding-left: 2rem;
  border-left: 2px solid var(--line);
  margin: 1rem 0;
}

.timeline-item {
  position: relative;
  padding-bottom: 2.25rem;
}

.timeline-item::before {
  content: "";
  position: absolute;
  left: calc(-2rem - 5px);
  top: 0.375rem;
  width: 0.875rem;
  height: 0.875rem;
  background: var(--accent);
  border: 2px solid var(--paper);
  box-shadow: 0 0 0 1px var(--ink);
  transform: rotate(45deg);
}

.timeline-item time {
  font-family: var(--font-body);
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--secondary-accent);
}

.timeline-item h3 {
  font-family: var(--font-heading);
  font-size: 1.125rem;
  color: var(--ink);
  margin: 0.1875rem 0 0.5rem;
  line-height: 1.4;
}

.timeline-item p {
  font-family: var(--font-body);
  font-size: 0.875rem;
  color: var(--gray);
  line-height: 1.7;
}

/* ----- Reveal Animation ----- */
[data-reveal] {
  opacity: 0;
  transform: translateY(1.25rem);
  transition: opacity 0.5s ease, transform 0.5s ease;
}

[data-reveal][data-revealed="true"] {
  opacity: 1;
  transform: none;
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

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

  .card,
  .btn,
  .nav-link {
    transition: none;
  }
}