/* ==========================================================================
   FB体育·CN — 全站共享样式
   文件：/assets/site.css
   设计语言：极简文字建筑 × 体育竞技数据面板
   ========================================================================== */

/* ---------- 设计变量 ---------- */
:root {
  --fb-green: #1B5E20;
  --fb-green-light: #2E7D32;
  --fb-orange: #FF6D00;
  --fb-orange-dark: #E65100;
  --fb-gold: #C9A227;
  --fb-carbon: #121212;
  --fb-carbon-light: #1C1C1C;
  --fb-white: #FFFFFF;
  --fb-light: #F5F5F5;
  --fb-gray: #9E9E9E;
  --fb-dark: #424242;
  --fb-heading: Impact, 'Noto Sans SC', 'Roboto', sans-serif;
  --fb-body: 'Roboto', 'Noto Sans SC', sans-serif;
  --fb-mono: 'Roboto Mono', 'Noto Sans SC', monospace;
  --fb-max: 1240px;
  --fb-gutter: clamp(16px, 4vw, 48px);
  --fb-radius: 6px;
  --fb-shadow: 0 1px 3px rgba(18, 18, 18, 0.08);
}

/* ---------- 重置与基础 ---------- */
*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-size: 16px;
  line-height: 1.75;
  -webkit-text-size-adjust: 100%;
  text-rendering: optimizeLegibility;
  scroll-behavior: smooth;
}

body {
  font-family: var(--fb-body);
  font-size: 1rem;
  color: var(--fb-dark);
  background: var(--fb-white);
  overflow-x: hidden;
  min-height: 100vh;
}

main {
  display: block;
}

ul,
ol {
  list-style: none;
}

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

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

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

::selection {
  background: var(--fb-green);
  color: var(--fb-white);
}

a:focus-visible,
button:focus-visible,
[tabindex]:focus-visible {
  outline: 3px solid var(--fb-orange);
  outline-offset: 3px;
  border-radius: 2px;
}

:focus:not(:focus-visible) {
  outline: none;
}

/* ---------- 跳转链接 ---------- */
.skip-link {
  position: fixed;
  top: 12px;
  left: 50%;
  z-index: 10000;
  transform: translate(-50%, -400%);
  background: var(--fb-green);
  color: var(--fb-white);
  font-family: var(--fb-body);
  font-size: 0.875rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  padding: 10px 24px;
  border-radius: var(--fb-radius);
  box-shadow: 0 6px 24px rgba(18, 18, 18, 0.35);
  transition: transform 0.2s ease;
}

.skip-link:focus {
  transform: translate(-50%, 0);
}

/* ---------- 页头：战术计分板 ---------- */
.site-header {
  position: relative;
  background: var(--fb-carbon);
  color: var(--fb-white);
  border-bottom: 3px solid var(--fb-green);
}

.site-header__progress {
  position: fixed;
  top: 0;
  left: 0;
  z-index: 1000;
  width: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--fb-green), var(--fb-orange));
  box-shadow: 0 0 10px rgba(255, 109, 0, 0.25);
  transition: width 0.2s linear;
}

.site-header__top {
  position: relative;
  max-width: var(--fb-max);
  margin: 0 auto;
  padding: 20px var(--fb-gutter);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
}

.site-header__top::before {
  content: 'FB';
  position: absolute;
  right: 9%;
  top: 50%;
  transform: translateY(-50%);
  z-index: 0;
  font-family: var(--fb-heading);
  font-size: 4.2rem;
  line-height: 1;
  color: rgba(255, 255, 255, 0.035);
  letter-spacing: 0.02em;
  pointer-events: none;
  user-select: none;
}

.site-header__brand,
.site-header__actions {
  position: relative;
  z-index: 1;
}

.site-header__brand {
  display: flex;
  align-items: center;
  gap: 14px;
  min-width: 0;
}

.site-header__logo {
  display: flex;
  flex-direction: column;
  line-height: 1.05;
  color: var(--fb-white);
  transition: opacity 0.2s ease;
}

.site-header__logo:hover {
  opacity: 0.85;
}

.site-header__logo-main {
  font-family: var(--fb-heading);
  font-size: clamp(1.6rem, 3.2vw, 2.2rem);
  font-weight: 900;
  letter-spacing: 0.03em;
  text-transform: uppercase;
  white-space: nowrap;
}

.site-header__logo-dot {
  color: var(--fb-orange);
}

.site-header__logo-sub {
  font-size: 0.72rem;
  font-weight: 500;
  letter-spacing: 0.42em;
  text-transform: uppercase;
  color: var(--fb-gray);
  margin-top: 4px;
  padding-left: 2px;
}

.site-header__badge {
  font-family: var(--fb-mono);
  font-size: 0.72rem;
  letter-spacing: 0.1em;
  white-space: nowrap;
  color: var(--fb-gold);
  background: rgba(201, 162, 39, 0.08);
  border: 1px solid var(--fb-gold);
  border-radius: 2px 0 2px 2px;
  padding: 4px 10px;
}

.site-header__actions {
  display: flex;
  align-items: center;
  gap: 14px;
  flex-shrink: 0;
}

.site-header__status {
  display: inline-flex;
  align-items: center;
  font-size: 0.8rem;
  letter-spacing: 0.03em;
  white-space: nowrap;
  color: var(--fb-light);
  background: rgba(27, 94, 32, 0.35);
  border-left: 3px solid var(--fb-green);
  padding: 6px 12px;
}

.site-header__status::before {
  content: '';
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: #66BB6A;
  margin-right: 8px;
  box-shadow: 0 0 6px rgba(102, 187, 106, 0.6);
}

.site-header__cta {
  border-radius: 6px 6px 6px 0;
}

.site-header__bottom {
  background: var(--fb-carbon-light);
  border-top: 1px solid rgba(255, 255, 255, 0.07);
}

.site-header__strip {
  height: 3px;
  background: repeating-linear-gradient(
    -45deg,
    var(--fb-green) 0,
    var(--fb-green) 12px,
    transparent 12px,
    transparent 24px
  );
  border-top: 1px solid rgba(255, 255, 255, 0.05);
}

/* ---------- 导航 ---------- */
.site-nav {
  max-width: var(--fb-max);
  margin: 0 auto;
  padding: 0 var(--fb-gutter);
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 54px;
}

.site-nav__toggle {
  display: none;
}

.site-nav__list {
  display: flex;
  align-items: center;
  gap: 2px;
  width: 100%;
}

.site-nav__item {
  position: relative;
}

.site-nav__link {
  display: block;
  padding: 17px 18px;
  font-size: 0.88rem;
  font-weight: 500;
  letter-spacing: 0.08em;
  color: var(--fb-light);
  transition: background 0.2s ease, color 0.2s ease;
}

.site-nav__link:hover {
  background: rgba(27, 94, 32, 0.55);
  color: var(--fb-white);
}

.site-nav__link[aria-current="page"] {
  background: var(--fb-green);
  color: var(--fb-white);
  font-weight: 700;
}

.site-nav__link[aria-current="page"]::after {
  content: '';
  position: absolute;
  left: 50%;
  bottom: -6px;
  transform: translateX(-50%);
  border-left: 6px solid transparent;
  border-right: 6px solid transparent;
  border-bottom: 6px solid var(--fb-orange);
}

/* ---------- 页脚：战报信息栏 ---------- */
.site-footer {
  position: relative;
  background: var(--fb-carbon);
  color: var(--fb-light);
  border-top: 4px solid var(--fb-gold);
}

.site-footer::before {
  content: '';
  position: absolute;
  top: -4px;
  left: 0;
  width: 180px;
  height: 4px;
  background: var(--fb-orange);
}

.site-footer__top {
  max-width: var(--fb-max);
  margin: 0 auto;
  padding: 48px var(--fb-gutter) 32px;
  display: grid;
  grid-template-columns: 1.2fr 1fr 1fr;
  gap: 40px;
}

.site-footer__brand-col {
  max-width: 46ch;
}

.site-footer__logo {
  font-family: var(--fb-heading);
  font-size: 1.9rem;
  font-weight: 900;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--fb-white);
}

.site-footer__logo-dot {
  color: var(--fb-orange);
}

.site-footer__trust {
  margin-top: 16px;
  padding-left: 14px;
  border-left: 3px solid var(--fb-green);
  font-size: 0.85rem;
  line-height: 1.9;
  color: var(--fb-gray);
}

.site-footer__heading {
  position: relative;
  font-family: var(--fb-heading);
  font-size: 1.05rem;
  font-weight: 900;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--fb-white);
  padding-bottom: 10px;
  margin-bottom: 18px;
  border-bottom: 2px solid var(--fb-green);
}

.site-footer__heading::after {
  content: '';
  position: absolute;
  left: 0;
  bottom: -2px;
  width: 42px;
  height: 2px;
  background: var(--fb-orange);
}

.site-footer__contact-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--fb-white);
  background: rgba(27, 94, 32, 0.35);
  border: 1px solid rgba(27, 94, 32, 0.8);
  border-radius: var(--fb-radius);
  padding: 8px 16px;
  margin-bottom: 16px;
  transition: background 0.2s ease, border-color 0.2s ease, color 0.2s ease;
}

.site-footer__contact-link:hover {
  background: var(--fb-green);
  border-color: var(--fb-green);
  color: var(--fb-white);
}

.site-footer__contact-list {
  display: grid;
  gap: 8px;
  font-size: 0.83rem;
  line-height: 1.7;
  color: var(--fb-gray);
}

.site-footer__contact-item strong {
  font-weight: 600;
  color: var(--fb-white);
}

.site-footer__legal-list {
  display: grid;
  gap: 10px;
}

.site-footer__legal-link {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-size: 0.85rem;
  color: var(--fb-light);
  transition: color 0.2s ease;
}

.site-footer__legal-link::before {
  content: '';
  width: 7px;
  height: 7px;
  background: var(--fb-orange);
  transform: skewX(-24deg);
  transition: transform 0.2s ease, background 0.2s ease;
}

.site-footer__legal-link:hover {
  color: var(--fb-orange);
}

.site-footer__legal-link:hover::before {
  transform: skewX(0deg);
  background: var(--fb-gold);
}

.site-footer__bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.07);
}

.site-footer__bottom-inner {
  max-width: var(--fb-max);
  margin: 0 auto;
  padding: 18px var(--fb-gutter);
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 8px 20px;
  font-family: var(--fb-mono);
  font-size: 0.75rem;
  color: var(--fb-gray);
}

/* ---------- 通用组件 ---------- */
.main-content {
  min-height: 60vh;
}

.main-content:focus {
  outline: none;
}

.content-wrap {
  max-width: var(--fb-max);
  margin: 0 auto;
  padding: 0 var(--fb-gutter);
}

.section {
  padding: 48px 0;
}

.section--alt {
  background: var(--fb-light);
}

/* 按钮 */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 11px 24px;
  font-family: var(--fb-body);
  font-size: 0.92rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  border: none;
  border-radius: var(--fb-radius);
  transition: background 0.2s ease, color 0.2s ease, transform 0.2s ease, box-shadow 0.2s ease;
}

.btn--green {
  background: var(--fb-green);
  color: var(--fb-white);
}

.btn--green:hover {
  background: var(--fb-green-light);
  color: var(--fb-white);
  transform: translateY(-2px);
  box-shadow: 0 4px 16px rgba(27, 94, 32, 0.28);
}

.btn--green:active {
  transform: translateY(0);
}

.btn--accent {
  background: var(--fb-orange);
  color: var(--fb-white);
  border-radius: 6px 6px 6px 0;
}

.btn--accent:hover {
  background: var(--fb-orange-dark);
  color: var(--fb-white);
  transform: translateY(-2px);
  box-shadow: 0 4px 16px rgba(255, 109, 0, 0.32);
}

.btn--accent:active {
  transform: translateY(0);
}

.btn--outline {
  border: 2px solid var(--fb-green);
  background: transparent;
  color: var(--fb-green);
}

.btn--outline:hover {
  background: var(--fb-green);
  color: var(--fb-white);
}

/* 标签 */
.tag {
  display: inline-flex;
  align-items: center;
  font-family: var(--fb-mono);
  font-size: 0.75rem;
  letter-spacing: 0.08em;
  color: var(--fb-gold);
  background: transparent;
  border: 1px solid var(--fb-gold);
  border-radius: 2px 0 2px 2px;
  padding: 4px 10px;
  white-space: nowrap;
}

/* 卡片面板 */
.panel {
  background: var(--fb-white);
  border: 1px solid #E3E3E3;
  border-radius: var(--fb-radius);
  padding: 24px;
  box-shadow: var(--fb-shadow);
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.panel:hover {
  transform: translateY(-4px);
  box-shadow: 0 10px 28px rgba(18, 18, 18, 0.12);
}

/* 面包屑 */
.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 4px;
  padding: 16px 0;
  font-size: 0.82rem;
  color: var(--fb-gray);
}

.breadcrumb a {
  font-weight: 500;
  color: var(--fb-green);
  transition: color 0.2s ease;
}

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

.breadcrumb__sep {
  color: var(--fb-gray);
  margin: 0 4px;
}

/* 分区标题 */
.section-title {
  position: relative;
  font-family: var(--fb-heading);
  font-size: clamp(1.7rem, 3.4vw, 2.5rem);
  font-weight: 900;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--fb-dark);
  padding-bottom: 12px;
  margin-bottom: 28px;
  border-bottom: 4px solid var(--fb-green);
}

.section-title::after {
  content: '';
  position: absolute;
  left: 0;
  bottom: -4px;
  width: 64px;
  height: 4px;
  background: var(--fb-orange);
}

.section-title--center {
  text-align: center;
}

.section-title--center::after {
  left: 50%;
  transform: translateX(-50%);
}

/* 栅格 */
.grid {
  display: grid;
  gap: 24px;
}

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

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

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

/* 图片容器 */
.image-frame {
  display: block;
  position: relative;
  overflow: hidden;
  aspect-ratio: 16 / 9;
  border: 1px solid #E3E3E3;
  border-radius: var(--fb-radius);
  background:
    repeating-linear-gradient(-45deg, rgba(18, 18, 18, 0.035) 0, rgba(18, 18, 18, 0.035) 10px, transparent 10px, transparent 20px),
    var(--fb-light);
}

.image-frame::after {
  content: 'FB';
  position: absolute;
  right: 10px;
  bottom: 6px;
  z-index: 2;
  font-family: var(--fb-heading);
  font-size: 1.1rem;
  color: rgba(18, 18, 18, 0.22);
  letter-spacing: 0.04em;
  pointer-events: none;
  user-select: none;
}

.image-frame img {
  position: relative;
  z-index: 1;
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.35s ease;
}

.image-frame:hover img {
  transform: scale(1.02);
}

.image-frame--portrait {
  aspect-ratio: 4 / 5;
}

.image-frame--wide {
  aspect-ratio: 21 / 9;
}

/* 滚动显现 */
.reveal {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity 0.5s ease, transform 0.5s ease;
}

.reveal.is-visible {
  opacity: 1;
  transform: translateY(0);
}

/* ---------- 响应式 ---------- */
@media (max-width: 1024px) {
  .site-nav__link {
    padding: 17px 12px;
    font-size: 0.84rem;
    letter-spacing: 0.04em;
  }

  .site-header__status {
    display: none;
  }

  .site-footer__top {
    grid-template-columns: 1fr 1fr;
    gap: 32px;
  }

  .site-footer__brand-col {
    grid-column: 1 / -1;
    max-width: 100%;
  }

  .grid--4 {
    grid-template-columns: repeat(2, 1fr);
  }

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

@media (max-width: 860px) {
  .site-header__top::before {
    display: none;
  }

  .site-header__bottom {
    min-height: 48px;
  }

  .site-nav {
    flex-wrap: wrap;
    min-height: 0;
  }

  .site-nav__toggle {
    display: flex;
    align-items: center;
    justify-content: space-between;
    width: 100%;
    padding: 16px 0;
    font-size: 0.85rem;
    font-weight: 700;
    letter-spacing: 0.16em;
    text-transform: uppercase;
    color: var(--fb-white);
    background: none;
  }

  .site-nav__toggle-text {
    font-size: 0.85rem;
    font-weight: 700;
    letter-spacing: 0.16em;
  }

  .site-nav__toggle-bars {
    display: block;
    width: 26px;
    line-height: 0;
  }

  .site-nav__toggle-bar {
    display: block;
    width: 100%;
    height: 3px;
    border-radius: 2px;
    background: var(--fb-orange);
    transition: transform 0.2s ease, opacity 0.2s ease;
  }

  .site-nav__toggle-bar + .site-nav__toggle-bar {
    margin-top: 5px;
  }

  .site-nav[data-open] .site-nav__toggle-bar:nth-child(1) {
    transform: translateY(8px) rotate(45deg);
  }

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

  .site-nav[data-open] .site-nav__toggle-bar:nth-child(3) {
    transform: translateY(-8px) rotate(-45deg);
  }

  .site-nav__list {
    display: none;
    flex-direction: column;
    width: 100%;
    padding-bottom: 12px;
  }

  .site-nav[data-open] .site-nav__list {
    display: flex;
  }

  html:not(.js) .site-nav__list {
    display: flex;
  }

  html:not(.js) .site-nav__toggle {
    display: none;
  }

  .site-nav__item {
    width: 100%;
    border-top: 1px solid rgba(255, 255, 255, 0.06);
  }

  .site-nav__link {
    width: 100%;
    padding: 14px 6px;
    font-size: 0.9rem;
  }

  .site-nav__link[aria-current="page"] {
    background: var(--fb-green);
    color: var(--fb-white);
    box-shadow: inset 4px 0 0 var(--fb-orange);
  }

  .site-nav__link[aria-current="page"]::after {
    display: none;
  }
}

@media (max-width: 640px) {
  .section {
    padding: 32px 0;
  }

  .grid--2,
  .grid--3,
  .grid--4 {
    grid-template-columns: 1fr;
  }

  .site-footer__top {
    grid-template-columns: 1fr;
    padding: 36px var(--fb-gutter) 20px;
  }

  .site-footer__brand-col {
    grid-column: auto;
  }
}

@media (max-width: 480px) {
  .site-header__badge {
    display: none;
  }

  .site-header__top {
    padding-top: 12px;
    padding-bottom: 12px;
  }

  .site-header__logo-main {
    font-size: 1.45rem;
  }

  .site-header__cta {
    padding: 8px 16px;
    font-size: 0.82rem;
  }

  .site-footer__bottom-inner {
    flex-direction: column;
    align-items: flex-start;
    gap: 4px;
  }
}

/* ---------- 减少动效 ---------- */
@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;
  }

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