/* ==========================================================================
   凤凰体育APP · 全站共享样式 /assets/site.css
   ========================================================================== */

/* ---------- 1. 变量与重置 ---------- */
:root {
  --paper: #F5F0E6;
  --rice: #F8F4E9;
  --ink: #0A1D2E;
  --deep-ink: #1A1B1E;
  --neon: #C0FF00;
  --alert: #8B1E2D;
  --silver: #B0B7C0;
  --mid-blue: #2D6A9F;
  --font-display: 'Noto Sans SC', 'PingFang SC', 'Microsoft YaHei', sans-serif;
  --font-body: 'Noto Sans SC', 'PingFang SC', 'Microsoft YaHei', sans-serif;
  --font-data: 'Roboto Mono', 'SFMono-Regular', Consolas, 'Liberation Mono', monospace;
  --font-index: 'IBM Plex Mono', 'SFMono-Regular', Consolas, 'Liberation Mono', monospace;
  --container-w: 1280px;
  --gutter: clamp(1rem, 3.5vw, 2.75rem);
  --chamfer: polygon(0 0, calc(100% - 14px) 0, 100% 14px, 100% 100%, 14px 100%, 0 calc(100% - 14px));
  --chamfer-sm: polygon(0 0, calc(100% - 8px) 0, 100% 8px, 100% 100%, 8px 100%, 0 calc(100% - 8px));
  --ease: cubic-bezier(0.22, 1, 0.36, 1);
  --dur: 0.32s;
}

*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: 6.5rem;
}

body {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  font-family: var(--font-body);
  font-size: 1rem;
  line-height: 1.75;
  color: var(--ink);
  background-color: var(--paper);
  background-image:
    linear-gradient(rgba(45, 106, 159, 0.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(45, 106, 159, 0.05) 1px, transparent 1px);
  background-size: 36px 36px;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

#main-content {
  flex: 1 0 auto;
}

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

ul,
ol {
  list-style: none;
}

a {
  color: var(--mid-blue);
  text-decoration: none;
  transition: color 0.2s var(--ease), background-color 0.2s var(--ease), padding-left 0.2s var(--ease);
}

a:hover {
  color: var(--ink);
}

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

::selection {
  background: var(--neon);
  color: var(--ink);
}

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

h1, h2, h3, h4 {
  font-family: var(--font-display);
  font-weight: 900;
  line-height: 1.2;
  letter-spacing: -0.02em;
  color: var(--ink);
}

h1 {
  font-size: clamp(2.5rem, 6vw, 4.5rem);
  line-height: 1.05;
}

h2 {
  font-size: clamp(1.75rem, 3.5vw, 2.75rem);
  margin-bottom: 1rem;
}

h3 {
  font-size: 1.375rem;
  margin-bottom: 0.75rem;
}

p + p {
  margin-top: 0.75em;
}

em {
  font-style: normal;
}

/* ---------- 2. 布局容器 ---------- */
.container {
  width: 100%;
  max-width: var(--container-w);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

/* ---------- 3. 无障碍 ---------- */
.skip-link {
  position: fixed;
  top: 0.75rem;
  left: 0.75rem;
  z-index: 3000;
  display: inline-block;
  padding: 0.625rem 1.125rem;
  background: var(--ink);
  color: var(--neon);
  font-weight: 700;
  letter-spacing: 0.05em;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.35);
  transform: translateY(-250%);
  transition: transform 0.25s var(--ease);
}

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

/* ---------- 4. 按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.75rem 1.5rem;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: 0.9375rem;
  letter-spacing: 0.04em;
  border: 2px solid var(--ink);
  background: transparent;
  color: var(--ink);
  clip-path: var(--chamfer-sm);
  cursor: pointer;
  transition: background-color 0.25s var(--ease), color 0.25s var(--ease), border-color 0.25s var(--ease), transform 0.25s var(--ease);
}

.btn:hover {
  background: var(--ink);
  border-color: var(--ink);
  color: var(--neon);
  transform: translate(-2px, -2px);
}

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

.btn-primary:hover {
  background: var(--ink);
  border-color: var(--ink);
  color: var(--neon);
}

.btn-ghost {
  border-color: var(--silver);
  color: var(--ink);
}

.btn-ghost:hover {
  border-color: var(--ink);
  background: var(--ink);
  color: var(--neon);
}

/* ---------- 5. 通用组件 ---------- */
.data-value {
  font-family: var(--font-data);
  font-weight: 700;
  font-variant-numeric: tabular-nums;
  letter-spacing: 0.02em;
}

.pulse-dot {
  display: inline-block;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--neon);
  box-shadow: 0 0 0 0 rgba(192, 255, 0, 0.45);
  animation: pulse-dot 2s ease-out infinite;
  flex: none;
}

@keyframes pulse-dot {
  0% { box-shadow: 0 0 0 0 rgba(192, 255, 0, 0.45); }
  55% { box-shadow: 0 0 0 7px rgba(192, 255, 0, 0); }
  100% { box-shadow: 0 0 0 0 rgba(192, 255, 0, 0); }
}

.section-label {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  font-family: var(--font-index);
  font-size: 0.8125rem;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--mid-blue);
}

.section-label::before {
  content: '';
  display: block;
  width: 30px;
  height: 2px;
  background: var(--neon);
  clip-path: polygon(0 0, 100% 0, calc(100% - 5px) 100%, 0 100%);
}

.chamfer-panel {
  background: var(--rice);
  border: 1px solid var(--silver);
  clip-path: var(--chamfer);
  padding: clamp(1.25rem, 3vw, 2.5rem);
}

.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.375rem;
  padding-block: 0.875rem 0;
  font-family: var(--font-data);
  font-size: 0.8125rem;
  letter-spacing: 0.04em;
  color: var(--silver);
  text-transform: uppercase;
}

.breadcrumb a {
  color: var(--mid-blue);
}

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

.breadcrumb-sep {
  color: var(--silver);
  margin-inline: 0.125rem;
}

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

.media-frame {
  position: relative;
  overflow: hidden;
  background: var(--deep-ink);
  border: 1px solid var(--silver);
  clip-path: var(--chamfer-sm);
}

.media-frame::before {
  content: '';
  display: block;
  padding-bottom: 56.25%;
}

.media-frame--square::before { padding-bottom: 100%; }
.media-frame--portrait::before { padding-bottom: 125%; }
.media-frame--wide::before { padding-bottom: 42.5%; }

.media-frame > img,
.media-frame > .media-placeholder {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
}

.media-frame > img {
  object-fit: cover;
}

.media-placeholder {
  display: grid;
  place-items: center;
  background: linear-gradient(135deg, var(--deep-ink) 0%, var(--ink) 100%);
  color: var(--silver);
  font-family: var(--font-data);
  font-size: 0.8125rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  text-align: center;
  padding: 1rem;
}

.timeline {
  position: relative;
  padding-left: 2rem;
  border-left: 2px solid var(--silver);
}

.timeline-item {
  position: relative;
  padding-bottom: 1.75rem;
}

.timeline-item::before {
  content: '';
  position: absolute;
  left: -2rem;
  top: 0.375rem;
  width: 10px;
  height: 10px;
  background: var(--paper);
  border: 2px solid var(--mid-blue);
  transform: rotate(45deg);
  margin-left: -6px;
}

.timeline-date {
  font-family: var(--font-data);
  font-weight: 700;
  font-size: 0.8125rem;
  color: var(--mid-blue);
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.page-hero {
  position: relative;
  padding-block: clamp(2.5rem, 6vw, 5rem);
  border-bottom: 1px solid var(--silver);
}

.page-overline {
  display: flex;
  align-items: center;
  gap: 0.75em;
  margin-bottom: 0.625rem;
  font-family: var(--font-index);
  font-size: 0.8125rem;
  font-weight: 700;
  letter-spacing: 0.14em;
  color: var(--mid-blue);
  text-transform: uppercase;
}

.page-overline::before {
  content: '';
  width: 2.5rem;
  height: 2px;
  background: var(--neon);
  clip-path: polygon(0 0, 100% 0, calc(100% - 5px) 100%, 0 100%);
}

.page-title {
  margin-bottom: 0.875rem;
  max-width: 18ch;
}

.page-lede {
  max-width: 56ch;
  font-size: 1.0625rem;
  color: var(--deep-ink);
}

/* ---------- 6. 头部 ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: var(--paper);
}

.header-status {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.625rem;
  height: 2.125rem;
  overflow: hidden;
  background: var(--deep-ink);
  color: var(--silver);
  font-family: var(--font-data);
  font-size: 0.75rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  transition: height 0.32s var(--ease), opacity 0.28s var(--ease);
}

.header-status::after {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  bottom: 0;
  width: 3px;
  background: var(--neon);
  opacity: 0.65;
}

.status-text {
  font-family: var(--font-data);
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.site-header[data-scrolled="true"] .header-status {
  height: 0;
  opacity: 0;
}

.header-main {
  border-bottom: 1px solid var(--silver);
}

.header-inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.875rem;
  padding-block: clamp(1.125rem, 2.5vw, 1.75rem);
  transition: padding 0.32s var(--ease), gap 0.32s var(--ease);
}

.site-header[data-scrolled="true"] .header-inner {
  padding-block: 0.5rem 0.625rem;
  gap: 0.5rem;
}

.site-brand {
  display: inline-flex;
  align-items: center;
  gap: 0.75rem;
  color: var(--ink);
}

.brand-mark {
  display: grid;
  place-items: center;
  width: clamp(2.25rem, 3vw, 3rem);
  height: clamp(2.25rem, 3vw, 3rem);
  background: var(--ink);
  color: var(--neon);
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(1rem, 1.6vw, 1.375rem);
  line-height: 1;
  clip-path: var(--chamfer-sm);
  transition: transform 0.3s var(--ease), width 0.32s var(--ease), height 0.32s var(--ease), font-size 0.32s var(--ease);
  flex: none;
}

.site-brand:hover .brand-mark {
  transform: rotate(-5deg);
}

.brand-text {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(1.375rem, 4vw, 2.25rem);
  letter-spacing: 0.04em;
  line-height: 1;
  color: var(--ink);
  white-space: nowrap;
  transition: font-size 0.32s var(--ease);
}

.brand-app {
  display: inline-block;
  margin-left: 0.25rem;
  padding: 0.12em 0.42em 0.1em;
  font-family: var(--font-data);
  font-weight: 700;
  font-size: 0.58em;
  letter-spacing: 0.08em;
  background: var(--neon);
  color: var(--ink);
  clip-path: var(--chamfer-sm);
  vertical-align: middle;
  line-height: 1.4;
}

.site-header[data-scrolled="true"] .brand-mark {
  width: 2rem;
  height: 2rem;
  font-size: 0.9375rem;
}

.site-header[data-scrolled="true"] .brand-text {
  font-size: clamp(1.125rem, 2.4vw, 1.625rem);
}

.site-nav {
  width: 100%;
  max-height: 0;
  overflow: hidden;
  opacity: 0;
  visibility: hidden;
  transition: max-height 0.35s var(--ease), opacity 0.25s var(--ease), visibility 0.25s;
}

.site-nav[data-open="true"] {
  max-height: 70vh;
  opacity: 1;
  visibility: visible;
}

.nav-list {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
  list-style: none;
}

.nav-item {
  flex: none;
}

.nav-link {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.625rem 0.875rem;
  font-weight: 700;
  font-size: 0.9375rem;
  color: var(--ink);
  border-left: 3px solid transparent;
  transition: color 0.2s var(--ease), background-color 0.2s var(--ease), border-color 0.2s var(--ease);
}

.nav-link:hover {
  background: var(--rice);
  color: var(--ink);
  border-left-color: var(--neon);
}

.nav-link[aria-current="page"] {
  color: var(--ink);
  border-left-color: var(--neon);
  background: rgba(192, 255, 0, 0.12);
}

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

.nav-index {
  font-family: var(--font-data);
  font-size: 0.6875rem;
  font-weight: 400;
  letter-spacing: 0.05em;
  color: var(--mid-blue);
  padding: 0.1em 0.3em;
  transition: color 0.2s, background-color 0.2s;
}

.nav-toggle {
  display: inline-flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 0.25rem;
  padding: 0.5rem 0.75rem;
  position: absolute;
  top: 50%;
  right: var(--gutter);
  transform: translateY(-50%);
  color: var(--ink);
  background: var(--rice);
  border: 1px solid var(--silver);
  clip-path: var(--chamfer-sm);
  transition: border-color 0.2s var(--ease), background-color 0.2s var(--ease);
}

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

.nav-toggle-icon {
  display: flex;
  flex-direction: column;
  gap: 4px;
  width: 20px;
  align-items: stretch;
}

.nav-toggle-line {
  display: block;
  height: 2px;
  background: currentColor;
  transition: transform 0.25s var(--ease), opacity 0.2s var(--ease);
}

.nav-toggle.is-active .nav-toggle-line:nth-child(1) {
  transform: translateY(6px) rotate(45deg);
}

.nav-toggle.is-active .nav-toggle-line:nth-child(2) {
  opacity: 0;
}

.nav-toggle.is-active .nav-toggle-line:nth-child(3) {
  transform: translateY(-6px) rotate(-45deg);
}

.nav-toggle-text {
  font-family: var(--font-data);
  font-size: 0.6875rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.header-progress {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  z-index: 30;
  pointer-events: none;
  overflow: hidden;
  background: transparent;
}

.header-progress span {
  display: block;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, var(--mid-blue) 0%, var(--neon) 100%);
  transform: scaleX(0);
  transform-origin: left center;
}

/* ---------- 7. 页脚 ---------- */
.site-footer {
  position: relative;
  background: linear-gradient(180deg, var(--ink) 0%, var(--deep-ink) 100%);
  border-top: 4px solid var(--neon);
  color: var(--silver);
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1.2fr;
  gap: clamp(2rem, 4vw, 3.5rem);
  padding-block: clamp(2.5rem, 5vw, 4rem);
}

.site-brand--footer {
  color: var(--rice);
}

.site-brand--footer .brand-mark {
  background: var(--neon);
  color: var(--ink);
}

.site-brand--footer .brand-text {
  color: var(--rice);
}

.site-brand--footer .brand-app {
  background: var(--neon);
  color: var(--ink);
}

.footer-trust {
  margin-top: 1.125rem;
  font-size: 0.875rem;
  line-height: 1.85;
  color: rgba(240, 240, 245, 0.72);
  max-width: 36ch;
}

.footer-title {
  font-family: var(--font-data);
  font-size: 0.8125rem;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--neon);
  margin-bottom: 1rem;
}

.footer-links {
  display: grid;
  gap: 0.5rem;
}

.footer-links a {
  color: rgba(240, 240, 245, 0.8);
  font-size: 0.9375rem;
}

.footer-links a:hover {
  color: var(--neon);
  padding-left: 0.375rem;
}

.footer-contact {
  display: grid;
  gap: 0.625rem;
}

.footer-contact li {
  display: flex;
  align-items: flex-start;
  gap: 0.625rem;
  font-size: 0.9375rem;
  color: rgba(240, 240, 245, 0.8);
  line-height: 1.6;
}

.contact-label {
  flex: none;
  min-width: 2.5em;
  font-family: var(--font-data);
  font-size: 0.6875rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--silver);
}

.footer-bottom {
  border-top: 1px dashed rgba(176, 183, 192, 0.35);
  padding-block: 1rem;
}

.footer-bottom-inner {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: center;
  gap: 0.5rem;
  font-family: var(--font-data);
  font-size: 0.75rem;
  letter-spacing: 0.06em;
  color: rgba(176, 183, 192, 0.72);
}

.footer-bottom-inner p {
  margin: 0;
}

/* ---------- 8. 响应式 ---------- */
@media (min-width: 768px) {
  .nav-toggle {
    display: none;
  }

  .site-nav {
    max-height: none;
    overflow: visible;
    opacity: 1;
    visibility: visible;
  }

  .nav-list {
    flex-direction: row;
    flex-wrap: wrap;
    justify-content: center;
  }

  .nav-link {
    padding: 0.5rem 0.9rem;
    border-left: none;
    border-bottom: 2px solid transparent;
  }

  .nav-link:hover {
    background: transparent;
    border-bottom-color: var(--neon);
    border-left-color: transparent;
  }

  .nav-link[aria-current="page"] {
    background: transparent;
    border-bottom-color: var(--ink);
    border-left-color: transparent;
  }

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

@media (max-width: 991px) and (min-width: 768px) {
  .footer-grid {
    grid-template-columns: 1fr 1fr;
  }

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

@media (max-width: 767px) {
  .header-inner {
    position: relative;
    padding-top: 1rem;
    padding-bottom: 1rem;
  }

  .brand-mark {
    width: 2.25rem;
    height: 2.25rem;
    font-size: 0.9375rem;
  }

  .brand-text {
    font-size: 1.375rem;
  }

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

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

/* ---------- 9. 减动效与焦点 ---------- */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }

  html {
    scroll-behavior: auto;
  }

  .pulse-dot {
    animation: none;
    box-shadow: none;
  }

  .skip-link {
    transition: none;
  }

  .header-status,
  .header-inner,
  .brand-mark,
  .brand-text {
    transition: none;
  }

  .nav-toggle.is-active .nav-toggle-line {
    transition: none;
  }
}