/* ============================================
   YIBO sports data — shared site kit
   harbor-yibo.com.cn
   ============================================ */

:root {
  --clr-deep: #0B2545;
  --clr-deep-dark: #081834;
  --clr-deep-light: #13315C;
  --clr-orange: #FF6B35;
  --clr-cyan: #00D9FF;
  --clr-light: #F4F6F8;
  --clr-ink: #1A1A2E;
  --clr-mist: #A0C4FF;
  --clr-warm: #EAEAEA;
  --clr-green: #2ECC71;
  --clr-yellow: #F1C40F;

  --font-heading: 'Noto Sans SC', 'Microsoft YaHei', sans-serif;
  --font-body: 'Source Han Sans SC', 'PingFang SC', 'Microsoft YaHei', sans-serif;
  --font-mono: 'Roboto Mono', 'SF Mono', monospace;

  --container-w: 1240px;
  --header-h: 76px;
  --radius: 4px;
  --transition: 0.25s cubic-bezier(0.4, 0, 0.2, 1);

  --shadow-sm: 0 2px 8px rgba(11, 37, 69, 0.08);
  --shadow-md: 0 8px 24px rgba(11, 37, 69, 0.12);
  --shadow-lg: 0 16px 48px rgba(11, 37, 69, 0.18);
}

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

* {
  margin: 0;
  padding: 0;
}

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

body {
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.75;
  color: var(--clr-ink);
  background-color: var(--clr-light);
  background-image:
    linear-gradient(rgba(160, 196, 255, 0.06) 1px, transparent 1px),
    linear-gradient(90deg, rgba(160, 196, 255, 0.06) 1px, transparent 1px);
  background-size: 28px 28px;
}

#main-content {
  min-height: 60vh;
}

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

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

ul,
ol {
  list-style: none;
}

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

h1,
h2,
h3,
h4 {
  font-family: var(--font-heading);
  font-weight: 900;
  color: var(--clr-deep);
  line-height: 1.3;
  letter-spacing: 0.02em;
}

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

.container {
  max-width: var(--container-w);
  margin-inline: auto;
  padding-inline: 24px;
}

.section {
  padding-block: 80px;
}

.section-head {
  max-width: 720px;
  margin-bottom: 48px;
}

.section-num {
  display: block;
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 500;
  letter-spacing: 0.14em;
  color: var(--clr-orange);
  margin-bottom: 8px;
}

.section-title {
  font-size: clamp(28px, 4vw, 44px);
  line-height: 1.25;
  margin-bottom: 16px;
}

.section-desc {
  font-size: 16px;
  line-height: 1.8;
  color: rgba(26, 26, 46, 0.72);
}

.grid {
  display: grid;
  gap: 24px;
}

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

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

.card {
  position: relative;
  background: #fff;
  border: 1px solid var(--clr-warm);
  border-top: 3px solid var(--clr-deep);
  border-radius: var(--radius);
  padding: 32px;
  box-shadow: var(--shadow-sm);
  transition:
    transform var(--transition),
    box-shadow var(--transition),
    border-top-color var(--transition);
}

.card::after {
  content: '';
  position: absolute;
  top: 16px;
  right: 16px;
  width: 20px;
  height: 20px;
  border-right: 2px solid var(--clr-orange);
  border-bottom: 2px solid var(--clr-orange);
  opacity: 0.6;
  transition:
    opacity var(--transition),
    transform var(--transition);
}

.card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
  border-top-color: var(--clr-orange);
}

.card:hover::after {
  opacity: 1;
  transform: translate(2px, 2px);
}

.panel {
  background: var(--clr-warm);
  border: 1px solid rgba(11, 37, 69, 0.1);
  border-radius: var(--radius);
  padding: 24px;
  box-shadow:
    inset 2px 2px 0 rgba(255, 255, 255, 0.8),
    inset -2px -2px 0 rgba(11, 37, 69, 0.04);
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 10px 24px;
  border: 2px solid transparent;
  border-radius: 2px;
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 14px;
  line-height: 1.5;
  text-align: center;
  cursor: pointer;
  transition:
    background var(--transition),
    border-color var(--transition),
    color var(--transition),
    transform var(--transition),
    box-shadow var(--transition);
}

.btn-primary {
  background: var(--clr-orange);
  color: #fff;
  box-shadow: 0 4px 12px rgba(255, 107, 53, 0.28);
}

.btn-primary:hover,
.btn-primary:focus-visible {
  background: #e85a24;
  transform: translateY(-2px);
  box-shadow: 0 8px 20px rgba(255, 107, 53, 0.32);
}

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

.btn-ghost:hover,
.btn-ghost:focus-visible {
  background: rgba(0, 217, 255, 0.1);
  transform: translateY(-2px);
}

.tag {
  display: inline-block;
  padding: 4px 12px 4px 14px;
  background: var(--clr-deep);
  color: #fff;
  border-left: 3px solid var(--clr-orange);
  border-radius: 0 2px 2px 0;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  line-height: 1.5;
}

.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 6px;
  margin-bottom: 24px;
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--clr-mist);
}

.breadcrumb a {
  color: var(--clr-orange);
  transition: color var(--transition);
}

.breadcrumb a:hover,
.breadcrumb a:focus-visible {
  color: var(--clr-deep);
}

.breadcrumb-sep {
  opacity: 0.6;
}

.data-label {
  display: block;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--clr-mist);
  margin-bottom: 4px;
}

.data-value {
  display: block;
  font-family: var(--font-mono);
  font-size: 30px;
  font-weight: 700;
  line-height: 1.2;
  color: var(--clr-deep);
}

.diag-line {
  display: block;
  width: 100%;
  height: 3px;
  margin: 40px 0;
  background: linear-gradient(90deg, var(--clr-orange), var(--clr-cyan), transparent);
  transform: skewX(-20deg);
}

.img-frame {
  position: relative;
  display: block;
  background: var(--clr-deep);
  border-radius: var(--radius);
  overflow: hidden;
}

.img-frame::before {
  content: '';
  display: block;
  padding-bottom: 66.67%;
}

.img-frame > img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.img-caption {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  z-index: 1;
  padding: 8px 12px;
  font-family: var(--font-mono);
  font-size: 11px;
  color: #fff;
  background: linear-gradient(transparent, rgba(11, 37, 69, 0.85));
}

[data-reveal] {
  opacity: 0;
  transform: translateY(24px);
  transition:
    opacity 0.6s ease,
    transform 0.6s ease;
}

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

/* ============================================
   Header
   ============================================ */

.site-header {
  position: sticky;
  top: 0;
  z-index: 900;
  background: var(--clr-deep);
  color: #fff;
  border-bottom: 1px solid rgba(160, 196, 255, 0.18);
  box-shadow: 0 4px 20px rgba(11, 37, 69, 0.18);
}

.skip-link {
  position: absolute;
  top: -60px;
  left: 24px;
  z-index: 1000;
  padding: 12px 20px;
  background: var(--clr-orange);
  color: #fff;
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 14px;
  border-radius: 0 0 4px 4px;
  box-shadow: var(--shadow-md);
  transition: top 0.25s ease;
}

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

.scroll-progress {
  position: absolute;
  top: 0;
  left: 0;
  z-index: 905;
  height: 3px;
  width: 0;
  background: linear-gradient(90deg, var(--clr-orange), var(--clr-cyan));
  pointer-events: none;
  will-change: width;
}

.header-inner {
  max-width: var(--container-w);
  margin-inline: auto;
  padding-inline: 24px;
  min-height: var(--header-h);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  position: relative;
}

.brand-link {
  display: inline-flex;
  flex-direction: column;
  gap: 3px;
  line-height: 1;
}

.brand-name {
  font-family: var(--font-heading);
  font-weight: 900;
  font-size: 26px;
  letter-spacing: 0.04em;
  color: #fff;
  line-height: 1;
}

.brand-name::after {
  content: '.';
  color: var(--clr-orange);
}

.brand-meta {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 6px;
  font-family: var(--font-mono);
  font-size: 11px;
  line-height: 1.4;
  color: var(--clr-mist);
}

.brand-domain {
  letter-spacing: 0.08em;
}

.brand-sep {
  opacity: 0.4;
}

.brand-status {
  display: inline-flex;
  align-items: center;
  gap: 5px;
}

.status-dot {
  display: inline-block;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--clr-green);
  flex: none;
}

.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 5px;
  width: 44px;
  height: 44px;
  border: 1px solid rgba(255, 255, 255, 0.2);
  border-radius: var(--radius);
  background: rgba(255, 255, 255, 0.04);
  cursor: pointer;
  transition:
    border-color var(--transition),
    background var(--transition);
  position: relative;
  z-index: 920;
}

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

.nav-toggle-bar {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--clr-orange);
  border-radius: 1px;
  transition:
    transform 0.3s ease,
    opacity 0.3s ease;
}

.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-panel {
  display: flex;
  align-items: center;
}

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

.site-nav a {
  position: relative;
  padding: 8px 12px;
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 14px;
  color: rgba(255, 255, 255, 0.75);
  border-radius: 2px;
  white-space: nowrap;
  transition: color var(--transition);
}

.site-nav a::after {
  content: '';
  position: absolute;
  left: 12px;
  right: 12px;
  bottom: 2px;
  height: 2px;
  background: var(--clr-orange);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--transition);
}

.site-nav a:hover,
.site-nav a:focus-visible {
  color: #fff;
}

.site-nav a:hover::after,
.site-nav a:focus-visible::after {
  transform: scaleX(1);
}

.site-nav a[aria-current="page"] {
  color: #fff;
}

.site-nav a[aria-current="page"]::before {
  content: '';
  position: absolute;
  left: 2px;
  top: 50%;
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: var(--clr-orange);
  transform: translateY(-50%);
}

.nav-meta {
  display: none;
}

/* ============================================
   Footer
   ============================================ */

.site-footer {
  position: relative;
  background: var(--clr-deep);
  color: rgba(255, 255, 255, 0.72);
}

.site-footer::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1;
  height: 4px;
  background: linear-gradient(90deg, var(--clr-orange), var(--clr-cyan) 70%, rgba(0, 217, 255, 0.3));
}

.site-footer::after {
  content: '';
  position: absolute;
  right: 0;
  bottom: 0;
  width: 220px;
  height: 100%;
  background: repeating-linear-gradient(
    135deg,
    rgba(0, 217, 255, 0.05) 0 6px,
    transparent 6px 12px
  );
  pointer-events: none;
}

.footer-top {
  position: relative;
  z-index: 1;
  max-width: var(--container-w);
  margin-inline: auto;
  padding: 64px 24px 48px;
  display: grid;
  grid-template-columns: minmax(260px, 2.2fr) 1fr 1fr 1.4fr;
  gap: 32px 48px;
}

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

.footer-brand-link {
  margin-bottom: 20px;
}

.footer-brand-link .brand-name {
  font-size: 28px;
}

.footer-trust {
  font-size: 14px;
  line-height: 1.8;
  color: rgba(255, 255, 255, 0.6);
  max-width: 340px;
}

.footer-col {
  padding-top: 4px;
}

.footer-heading {
  font-family: var(--font-heading);
  font-weight: 900;
  font-size: 13px;
  text-transform: uppercase;
  letter-spacing: 0.16em;
  color: #fff;
  margin-bottom: 18px;
  padding-bottom: 8px;
  position: relative;
}

.footer-heading::after {
  content: '';
  position: absolute;
  left: 0;
  bottom: 0;
  width: 22px;
  height: 2px;
  background: var(--clr-orange);
}

.footer-links li + li {
  margin-top: 10px;
}

.footer-links a {
  display: inline-block;
  font-size: 14px;
  color: rgba(255, 255, 255, 0.65);
  transition:
    color var(--transition),
    padding-left var(--transition);
}

.footer-links a:hover,
.footer-links a:focus-visible {
  color: var(--clr-cyan);
  padding-left: 4px;
}

.footer-contact li {
  font-size: 14px;
  line-height: 1.8;
  color: rgba(255, 255, 255, 0.65);
  word-break: break-all;
}

.footer-contact li + li {
  margin-top: 8px;
}

.contact-note {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--clr-mist);
}

.footer-bottom {
  position: relative;
  z-index: 1;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-bottom-inner {
  max-width: var(--container-w);
  margin-inline: auto;
  padding: 20px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
  font-family: var(--font-mono);
  font-size: 12px;
  color: rgba(255, 255, 255, 0.42);
  letter-spacing: 0.04em;
}

.footer-icp {
  white-space: nowrap;
}

/* ============================================
   Responsive
   ============================================ */

@media (max-width: 1100px) {
  .grid-3 {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 900px) {
  .nav-toggle {
    display: flex;
  }

  .nav-panel {
    position: fixed;
    inset: 0;
    z-index: 910;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    background: var(--clr-deep);
    padding: 88px 24px 40px;
    opacity: 0;
    visibility: hidden;
    transition:
      opacity 0.3s ease,
      visibility 0.3s ease;
  }

  .nav-panel[data-open="true"] {
    opacity: 1;
    visibility: visible;
  }

  .site-nav {
    flex-direction: column;
    width: 100%;
    max-width: 300px;
    gap: 0;
  }

  .site-nav a {
    width: 100%;
    padding: 14px 0;
    font-size: 19px;
    text-align: center;
    border-bottom: 1px solid rgba(255, 255, 255, 0.08);
    color: rgba(255, 255, 255, 0.85);
  }

  .site-nav a::after {
    left: 50%;
    right: auto;
    width: 40px;
    transform: translateX(-50%) scaleX(0);
  }

  .site-nav a:hover::after,
  .site-nav a:focus-visible::after {
    transform: translateX(-50%) scaleX(1);
  }

  .site-nav a[aria-current="page"] {
    color: var(--clr-orange);
  }

  .site-nav a[aria-current="page"]::before {
    display: none;
  }

  .nav-meta {
    display: block;
    margin-top: 32px;
    font-family: var(--font-mono);
    font-size: 12px;
    color: var(--clr-mist);
    letter-spacing: 0.1em;
    text-align: center;
  }

  .footer-top {
    grid-template-columns: 1fr 1fr;
  }

  .footer-brand-block {
    grid-column: 1 / -1;
  }
}

@media (max-width: 640px) {
  .section {
    padding-block: 56px;
  }

  .section-head {
    margin-bottom: 32px;
  }

  .footer-top {
    grid-template-columns: 1fr;
    gap: 32px;
  }

  .footer-brand-block {
    grid-column: auto;
  }

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

  .card {
    padding: 24px;
  }

  .header-inner {
    padding-inline: 16px;
  }

  .brand-name {
    font-size: 22px;
  }

  .brand-status {
    display: none;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }

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