/* ==========================================================
   非凡体育（中国）官网 — 全站共享样式
   文件：/assets/site.css
   ========================================================== */

/* ---------- 1. CSS 变量 ---------- */
:root {
  --brand-main: #0A1F44;
  --brand-accent: #FF6B35;
  --gold-point: #FFD700;
  --bg-base: #F5F4F0;
  --ink-text: #1C1B1A;
  --muted-text: #6B7280;
  --line-divider: #D1D5DB;
  --dark-surface: #07172E;
  --orange-soft: #FF8C5A;

  --heading-font: Georgia, 'Times New Roman', 'Noto Serif SC', 'Source Han Serif SC', serif;
  --body-font: 'Open Sans', 'Noto Sans SC', 'Source Han Sans SC', system-ui, sans-serif;
  --data-font: 'Roboto Mono', 'SFMono-Regular', Menlo, monospace;

  --h1-size: clamp(48px, 7vw, 88px);
  --h2-size: clamp(30px, 4vw, 56px);
  --h3-size: clamp(20px, 3vw, 28px);
  --body-size: clamp(16px, 2vw, 20px);

  --rail-width: 220px;
  --header-h-mobile: 62px;
  --max-content: 1200px;
  --content-pad: 20px;

  --ease-fast: 0.2s ease;
  --ease-med: 0.35s cubic-bezier(0.4, 0, 0.2, 1);
  --ease-out: 0.5s cubic-bezier(0.16, 1, 0.3, 1);

  --shadow-panel: 0 8px 32px rgba(7, 23, 46, 0.22);
  --shadow-rail: 4px 0 24px rgba(7, 23, 46, 0.18);
}

/* ---------- 2. Reset 与基础 ---------- */
*, *::before, *::after {
  box-sizing: border-box;
}

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

body {
  margin: 0;
  font-family: var(--body-font);
  font-size: var(--body-size);
  line-height: 1.65;
  color: var(--ink-text);
  background-color: var(--bg-base);
  padding-top: var(--header-h-mobile);
}

@media (min-width: 900px) {
  body {
    padding-top: 0;
    padding-left: var(--rail-width);
  }
}

body.nav-locked {
  overflow: hidden;
}

body::after {
  content: "";
  position: fixed;
  inset: var(--header-h-mobile) 0 0 0;
  z-index: 105;
  background: rgba(7, 23, 46, 0.55);
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--ease-med);
}

body.nav-locked::after {
  opacity: 1;
  pointer-events: auto;
}

@media (min-width: 900px) {
  body::after {
    display: none;
  }
}

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

a {
  color: inherit;
  text-decoration: none;
  transition: color var(--ease-fast);
}

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

ul, ol {
  margin: 0;
  padding: 0;
  list-style: none;
}

h1, h2, h3, h4, h5, h6 {
  margin: 0;
  font-family: var(--heading-font);
  font-weight: 700;
  line-height: 1.12;
  letter-spacing: -0.01em;
}

h1 { font-size: var(--h1-size); }
h2 { font-size: var(--h2-size); }
h3 { font-size: var(--h3-size); }

p {
  margin: 0 0 1em;
}

code, kbd, .mono {
  font-family: var(--data-font);
}

:focus-visible {
  outline: 3px solid var(--brand-accent);
  outline-offset: 3px;
}

::selection {
  background: var(--brand-accent);
  color: #fff;
}

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

/* ---------- 3. 容器与网格 ---------- */
.container {
  width: min(var(--max-content), 100% - 2 * var(--content-pad));
  margin-inline: auto;
}

.page-shell {
  min-height: 65vh;
}

.section {
  padding-block: clamp(48px, 8vw, 96px);
}

.content-grid {
  display: grid;
  grid-template-columns: repeat(12, 1fr);
  gap: 20px;
}

@media (min-width: 768px) {
  .content-grid {
    gap: 28px;
  }
}

.col-3 { grid-column: span 3; }
.col-4 { grid-column: span 4; }
.col-5 { grid-column: span 5; }
.col-6 { grid-column: span 6; }
.col-7 { grid-column: span 7; }
.col-8 { grid-column: span 8; }
.col-9 { grid-column: span 9; }
.col-12 { grid-column: span 12; }

@media (max-width: 767px) {
  .col-3, .col-4, .col-5, .col-6, .col-7, .col-8, .col-9, .col-12 {
    grid-column: span 12;
  }
}

/* ---------- 4. 按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 12px 24px;
  border: 2px solid transparent;
  border-radius: 4px;
  font-family: var(--body-font);
  font-size: 0.95rem;
  font-weight: 600;
  line-height: 1.2;
  cursor: pointer;
  transition: background var(--ease-fast), color var(--ease-fast), border-color var(--ease-fast), transform var(--ease-fast);
}

.btn:active {
  transform: translateY(1px);
}

.btn--accent {
  background: var(--brand-accent);
  color: #fff;
}

.btn--accent:hover {
  background: var(--orange-soft);
  color: #fff;
}

.btn--ghost {
  background: transparent;
  color: #fff;
  border-color: rgba(255, 255, 255, 0.5);
}

.btn--ghost:hover {
  border-color: #fff;
  color: var(--gold-point);
}

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

.btn--outline:hover {
  background: var(--brand-main);
  color: #fff;
}

/* ---------- 5. 头部 · 跳转链接 ---------- */
.skip-link {
  position: fixed;
  top: -80px;
  left: 16px;
  z-index: 300;
  padding: 12px 20px;
  background: var(--brand-accent);
  color: #fff;
  font-weight: 700;
  border-radius: 0 0 6px 6px;
  box-shadow: var(--shadow-panel);
  transition: top var(--ease-med);
}

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

/* ---------- 6. 头部 · 移动顶栏 ---------- */
.mobile-header-bar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 120;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: var(--header-h-mobile);
  padding: 0 16px;
  background: var(--dark-surface);
  border-bottom: 3px solid var(--brand-accent);
}

@media (min-width: 900px) {
  .mobile-header-bar {
    display: none;
  }
}

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

.brand-mark--compact {
  color: #fff;
}

.brand-mark--compact:hover {
  color: var(--gold-point);
}

.brand-wing {
  width: 36px;
  height: 24px;
  flex: none;
  filter: drop-shadow(0 2px 4px rgba(255, 107, 53, 0.4));
  transition: filter var(--ease-fast);
}

.brand-word {
  font-family: var(--heading-font);
  font-size: 1.2rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  color: inherit;
}

/* 汉堡按钮 */
.nav-toggle {
  display: inline-flex;
  flex-direction: column;
  justify-content: center;
  gap: 6px;
  width: 44px;
  height: 44px;
  padding: 8px;
  background: transparent;
  border: 0;
  border-radius: 4px;
  cursor: pointer;
}

.nav-toggle:hover {
  background: rgba(255, 255, 255, 0.08);
}

.nav-toggle-line {
  display: block;
  width: 28px;
  height: 3px;
  background: #fff;
  border-radius: 3px;
  transition: transform var(--ease-med), opacity var(--ease-med);
}

.nav-toggle[aria-expanded="true"] .nav-toggle-line:nth-child(1) {
  transform: translateY(9px) 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(-9px) rotate(-45deg);
}

/* ---------- 7. 头部 · 轨道导航 ---------- */
.rail-nav {
  position: fixed;
  top: var(--header-h-mobile);
  bottom: 0;
  left: 0;
  z-index: 110;
  display: flex;
  flex-direction: column;
  width: var(--rail-width);
  padding: 24px 0 20px;
  background: var(--brand-main);
  color: #fff;
  overflow-y: auto;
  transform: translateX(-100%);
  transition: transform var(--ease-med);
}

.rail-nav::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--brand-accent) 0 40%, var(--gold-point) 40% 100%);
  z-index: 1;
}

.rail-nav::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 6px;
  background: linear-gradient(90deg, var(--brand-accent) 0 33%, var(--gold-point) 33% 66%, transparent 66%);
  opacity: 0.7;
}

.rail-nav[data-open="true"] {
  transform: translateX(0);
  box-shadow: var(--shadow-rail);
}

@media (min-width: 900px) {
  .rail-nav {
    top: 0;
    transform: none;
    box-shadow: var(--shadow-rail);
  }

  .rail-nav[data-open="true"] {
    box-shadow: var(--shadow-rail);
  }
}

/* 轨道品牌区 */
.rail-brand {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 0 20px 28px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.12);
  margin-bottom: 18px;
  color: #fff;
}

.rail-brand:hover {
  color: var(--gold-point);
}

.rail-brand:hover .brand-wing {
  filter: drop-shadow(0 0 8px rgba(255, 215, 0, 0.4));
}

.rail-brand-text {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.rail-brand-text strong {
  font-family: var(--heading-font);
  font-size: 1.35rem;
  line-height: 1.1;
}

.rail-brand-text small {
  font-size: 0.72rem;
  color: rgba(255, 255, 255, 0.65);
  letter-spacing: 0.08em;
}

/* 导航链接 */
.nav-links {
  display: flex;
  flex-direction: column;
  gap: 2px;
  padding: 0 14px;
}

.nav-link {
  position: relative;
  display: block;
  padding: 11px 18px;
  font-size: 0.95rem;
  font-weight: 600;
  color: rgba(255, 255, 255, 0.85);
  border-radius: 6px;
  transition: background var(--ease-fast), color var(--ease-fast), padding-left var(--ease-fast);
}

.nav-link::before {
  content: "";
  position: absolute;
  left: 0;
  top: 20%;
  bottom: 20%;
  width: 3px;
  border-radius: 0 3px 3px 0;
  background: transparent;
  transition: background var(--ease-fast);
}

.nav-link:hover {
  background: rgba(255, 255, 255, 0.06);
  color: #fff;
  padding-left: 22px;
}

.nav-link[aria-current="page"] {
  background: rgba(255, 107, 53, 0.14);
  color: var(--brand-accent);
}

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

.nav-link.is-active {
  background: rgba(255, 107, 53, 0.1);
  color: var(--orange-soft);
}

/* 轨道工具区 */
.rail-tools {
  margin-top: auto;
  display: flex;
  align-items: center;
  gap: 4px;
  padding: 18px 20px 4px;
  border-top: 1px solid rgba(255, 255, 255, 0.12);
}

.rail-tool {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 12px;
  background: transparent;
  border: 1px solid transparent;
  border-radius: 4px;
  color: rgba(255, 255, 255, 0.72);
  font-family: var(--body-font);
  font-size: 0.82rem;
  font-weight: 600;
  line-height: 1;
  white-space: nowrap;
  cursor: pointer;
  transition: color var(--ease-fast), border-color var(--ease-fast), background var(--ease-fast);
}

.rail-tool:hover {
  color: #fff;
  background: rgba(255, 255, 255, 0.06);
}

.rail-tool--icon {
  padding: 8px;
}

.rail-divider {
  flex: none;
  width: 1px;
  height: 18px;
  background: rgba(255, 255, 255, 0.18);
}

/* ---------- 8. 头部 · 快速入口 ---------- */
.quick-find {
  position: fixed;
  top: calc(var(--header-h-mobile) + 8px);
  left: 12px;
  right: 12px;
  z-index: 130;
  padding: 16px;
  background: var(--dark-surface);
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: 10px;
  box-shadow: var(--shadow-panel);
  opacity: 0;
  transform: translateY(-8px);
  visibility: hidden;
  pointer-events: none;
  transition: opacity var(--ease-med), transform var(--ease-med), visibility 0s linear var(--ease-med);
}

.quick-find[data-open="true"] {
  opacity: 1;
  transform: translateY(0);
  visibility: visible;
  pointer-events: auto;
  transition: opacity var(--ease-med), transform var(--ease-med), visibility 0s;
}

@media (min-width: 900px) {
  .quick-find {
    top: 84px;
    left: calc(var(--rail-width) + 16px);
    right: auto;
    min-width: 240px;
  }
}

.quick-find-label {
  margin: 0 0 8px;
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--gold-point);
}

.quick-find-list a {
  display: block;
  padding: 9px 12px;
  border-radius: 6px;
  color: rgba(255, 255, 255, 0.85);
  font-size: 0.9rem;
  font-weight: 600;
  transition: background var(--ease-fast), color var(--ease-fast), padding-left var(--ease-fast);
}

.quick-find-list a:hover {
  background: rgba(255, 107, 53, 0.14);
  color: var(--orange-soft);
  padding-left: 16px;
}

/* ---------- 9. 面包屑 ---------- */
.breadcrumbs {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  align-items: center;
  padding: 16px 0;
  font-size: 0.85rem;
  color: var(--muted-text);
}

.breadcrumbs a {
  color: var(--muted-text);
}

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

.breadcrumbs .sep {
  color: var(--line-divider);
}

.breadcrumbs [aria-current="page"] {
  color: var(--ink-text);
  font-weight: 600;
}

/* ---------- 10. 媒体容器 ---------- */
.media-frame {
  position: relative;
  overflow: hidden;
  background: var(--line-divider);
  border-radius: 4px;
}

.media-frame--16x9 { aspect-ratio: 16 / 9; }
.media-frame--4x3 { aspect-ratio: 4 / 3; }
.media-frame--3x2 { aspect-ratio: 3 / 2; }
.media-frame--1x1 { aspect-ratio: 1 / 1; }

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

.media-placeholder {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  background:
    linear-gradient(135deg, rgba(10, 31, 68, 0.08) 25%, transparent 25%) 0 0 / 20px 20px,
    linear-gradient(-135deg, rgba(10, 31, 68, 0.08) 25%, transparent 25%) 0 0 / 20px 20px,
    var(--bg-base);
  color: var(--brand-main);
  font-family: var(--heading-font);
  font-size: 1rem;
  letter-spacing: 0.1em;
}

.media-frame--dark .media-placeholder {
  background: var(--brand-main);
  color: rgba(255, 255, 255, 0.5);
}

/* ---------- 11. 数据面板 ---------- */
.data-panel {
  padding: 28px 24px;
  background: #fff;
  border-left: 4px solid var(--brand-accent);
  box-shadow: 0 2px 12px rgba(7, 23, 46, 0.06);
  border-radius: 0 8px 8px 0;
}

.data-panel__number {
  font-family: var(--data-font);
  font-size: clamp(32px, 5vw, 52px);
  font-weight: 700;
  line-height: 1;
  color: var(--brand-main);
}

.data-panel__label {
  margin-top: 8px;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--muted-text);
}

.data-panel__note {
  margin-top: 4px;
  font-size: 0.78rem;
  color: var(--muted-text);
}

/* ---------- 12. 折叠面板 ---------- */
.accordion {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.accordion__item {
  background: #fff;
  border-radius: 6px;
  box-shadow: 0 1px 6px rgba(7, 23, 46, 0.05);
  overflow: hidden;
}

.accordion__trigger {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  width: 100%;
  padding: 18px 20px;
  background: transparent;
  border: 0;
  cursor: pointer;
  font-family: var(--body-font);
  font-size: 1rem;
  font-weight: 600;
  color: var(--ink-text);
  text-align: left;
  transition: background var(--ease-fast), color var(--ease-fast);
}

.accordion__trigger:hover {
  background: rgba(255, 107, 53, 0.06);
  color: var(--brand-main);
}

.accordion__icon {
  flex: none;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 22px;
  height: 22px;
  border-radius: 50%;
  border: 2px solid var(--brand-main);
  color: var(--brand-main);
  font-size: 0.8rem;
  line-height: 1;
  transition: transform var(--ease-med), background var(--ease-med), color var(--ease-med), border-color var(--ease-med);
}

.accordion__trigger[aria-expanded="true"] .accordion__icon {
  transform: rotate(45deg);
  background: var(--brand-accent);
  border-color: var(--brand-accent);
  color: #fff;
}

.accordion__panel {
  display: grid;
  grid-template-rows: 0fr;
  transition: grid-template-rows var(--ease-med);
}

.accordion__panel[data-open="true"] {
  grid-template-rows: 1fr;
}

.accordion__inner {
  overflow: hidden;
  min-height: 0;
  padding: 0 20px 18px;
  color: var(--muted-text);
  font-size: 0.95rem;
  line-height: 1.7;
}

/* ---------- 13. 显现动效 ---------- */
.js-ready [data-reveal] {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity var(--ease-out), transform var(--ease-out);
}

.js-ready [data-reveal].is-visible {
  opacity: 1;
  transform: none;
}

@media (prefers-reduced-motion: reduce) {
  .js-ready [data-reveal] {
    opacity: 1;
    transform: none;
    transition: none;
  }
}

/* ---------- 14. 页脚 ---------- */
.site-footer {
  background: var(--dark-surface);
  color: rgba(255, 255, 255, 0.78);
  border-top: 4px solid var(--brand-accent);
  font-size: 0.95rem;
}

.footer-inner {
  width: min(var(--max-content), 100% - 2 * var(--content-pad));
  margin-inline: auto;
  padding-block: 56px 24px;
}

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

@media (min-width: 640px) {
  .footer-top {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 1000px) {
  .footer-top {
    grid-template-columns: 1.2fr 1fr 1.4fr;
    gap: 48px;
  }
}

.footer-brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  color: #fff;
}

.footer-brand:hover {
  color: var(--gold-point);
}

.footer-brand:hover .brand-wing {
  filter: drop-shadow(0 0 8px rgba(255, 215, 0, 0.4));
}

.footer-brand-word {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.footer-brand-word strong {
  font-family: var(--heading-font);
  font-size: 1.3rem;
  line-height: 1.1;
}

.footer-brand-word small {
  font-size: 0.75rem;
  color: rgba(255, 255, 255, 0.6);
  letter-spacing: 0.08em;
}

.footer-tagline {
  margin: 16px 0 0;
  font-size: 0.86rem;
  color: rgba(255, 255, 255, 0.55);
  line-height: 1.7;
}

.footer-heading {
  margin-bottom: 14px;
  font-family: var(--body-font);
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.16em;
  color: var(--gold-point);
}

.footer-links,
.footer-contact {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.footer-links a {
  display: inline-block;
  padding: 2px 0;
  color: rgba(255, 255, 255, 0.78);
  transition: color var(--ease-fast), padding-left var(--ease-fast);
}

.footer-links a:hover {
  color: var(--orange-soft);
  padding-left: 6px;
}

.footer-contact li {
  display: flex;
  flex-direction: column;
  gap: 2px;
  line-height: 1.5;
}

.contact-label {
  font-size: 0.72rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: rgba(255, 255, 255, 0.45);
}

.footer-contact-note {
  font-size: 0.78rem;
  color: rgba(255, 255, 255, 0.45);
}

.footer-trust {
  margin: 40px 0 0;
  padding: 20px 0;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
  font-size: 0.86rem;
  line-height: 1.8;
  color: rgba(255, 255, 255, 0.6);
}

.footer-bottom {
  display: flex;
  flex-direction: column;
  gap: 12px;
  align-items: center;
  padding-top: 18px;
  font-size: 0.8rem;
  color: rgba(255, 255, 255, 0.45);
  text-align: center;
}

.footer-meta {
  margin: 0;
}

@media (min-width: 768px) {
  .footer-bottom {
    flex-direction: row;
    justify-content: space-between;
    text-align: left;
  }
}

.footer-legal {
  display: inline-flex;
  align-items: center;
  gap: 10px;
}

.footer-legal a {
  color: rgba(255, 255, 255, 0.65);
  transition: color var(--ease-fast);
}

.footer-legal a:hover {
  color: var(--orange-soft);
}

.legal-divider {
  color: rgba(255, 255, 255, 0.2);
}

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