/* =========================================================
   完美体育官网 / site.css
   共享样式：全站基础、头部、页脚、通用组件
   ========================================================= */

/* ---------- CSS 变量 ---------- */
:root {
  --green-950: #071f18;
  --green-900: #0b3b2e;
  --green-800: #12483c;
  --green-700: #1e5a4b;
  --green-600: #2b6e5c;
  --ice-500: #a8dadc;
  --ice-300: #cce8e9;
  --gold-500: #e6b422;
  --gold-300: #f2d06b;
  --cream-100: #f5f3ef;
  --ink-900: #1a1c1b;
  --line-green: #dce5df;

  --font-head: "Arial Black", "Noto Sans SC", sans-serif;
  --font-body: "Noto Sans SC", "Microsoft YaHei", sans-serif;
  --font-data: "Roboto Mono", Consolas, monospace;

  --radius-panel: 0px;
  --radius-btn: 4px;
  --radius-tag: 4px;
  --radius-pill: 999px;

  --space-xs: 4px;
  --space-sm: 8px;
  --space-md: 16px;
  --space-lg: 24px;
  --space-xl: 32px;
  --space-2xl: 48px;
  --space-3xl: 64px;

  --content-width: 1200px;
  --content-pad: 24px;
  --header-offset: 96px;

  --ease: 0.2s ease;
  --ease-slow: 0.3s ease;
}

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

html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
  scroll-padding-top: var(--header-offset);
}

body {
  min-height: 100vh;
  background-color: var(--green-900);
  background-image:
    linear-gradient(rgba(168, 218, 220, 0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(168, 218, 220, 0.03) 1px, transparent 1px);
  background-size: 40px 40px;
  color: var(--cream-100);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

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

a {
  color: var(--ice-500);
  text-decoration: underline;
  text-underline-offset: 3px;
  transition: color var(--ease);
}

a:hover {
  color: var(--gold-300);
}

button,
input,
select,
textarea {
  font: inherit;
  color: inherit;
}

[hidden] {
  display: none !important;
}

::selection {
  background: var(--gold-500);
  color: var(--green-900);
}

:focus-visible {
  outline: 2px solid var(--gold-500);
  outline-offset: 3px;
}

/* ---------- 排版 ---------- */
h1,
h2,
h3,
h4 {
  font-family: var(--font-head);
  line-height: 1.3;
  font-weight: 700;
  color: var(--cream-100);
}

h1 {
  font-size: clamp(2rem, 4vw, 2.75rem);
}

h2 {
  font-size: clamp(1.6rem, 3vw, 2.1rem);
}

h3 {
  font-size: 1.375rem;
}

h4 {
  font-size: 1.125rem;
}

p {
  color: rgba(245, 243, 239, 0.8);
}

small {
  font-size: 0.875rem;
}

/* ---------- 布局与容器 ---------- */
.container {
  width: 100%;
  max-width: var(--content-width);
  margin-inline: auto;
  padding-inline: var(--content-pad);
}

.main-content {
  display: block;
  min-height: calc(100vh - 320px);
}

.section {
  padding-block: var(--space-3xl);
}

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

/* ---------- 无障碍跳转 ---------- */
.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
  z-index: 3000;
  background: var(--gold-500);
  color: var(--green-900);
  font-weight: 600;
  padding: 10px 18px;
  font-size: 14px;
  text-decoration: none;
  border-radius: 0 0 var(--radius-btn) 0;
}

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

/* ---------- 滚动进度条 ---------- */
.scroll-progress {
  position: fixed;
  top: 0;
  left: 0;
  z-index: 1300;
  width: 100%;
  height: 3px;
  background: linear-gradient(90deg, var(--gold-500), var(--ice-500));
  transform: scaleX(0);
  transform-origin: left center;
  pointer-events: none;
}

/* ---------- 头部悬浮胶囊导航 ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  padding: 14px 20px 0;
}

.header-inner {
  max-width: var(--content-width);
  margin-inline: auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  background: rgba(9, 45, 35, 0.88);
  border: 1px solid rgba(168, 218, 220, 0.2);
  border-radius: var(--radius-pill);
  padding: 8px 10px 8px 22px;
  box-shadow: 0 10px 36px rgba(0, 0, 0, 0.25), inset 0 1px 0 rgba(255, 255, 255, 0.03);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
  flex-shrink: 0;
}

.brand-mark {
  width: 40px;
  height: 40px;
  color: var(--gold-500);
  flex-shrink: 0;
}

.brand-name {
  font-family: var(--font-head);
  font-size: 18px;
  letter-spacing: 0.08em;
  color: var(--cream-100);
  white-space: nowrap;
}

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

.nav-list {
  display: flex;
  align-items: center;
  gap: 2px;
  list-style: none;
  margin: 0;
  padding: 0;
}

.nav-list a {
  display: block;
  padding: 8px 14px;
  border-radius: var(--radius-pill);
  font-size: 14px;
  font-weight: 500;
  color: rgba(245, 243, 239, 0.86);
  text-decoration: none;
  transition: background var(--ease), color var(--ease);
}

.nav-list a:hover,
.nav-list a:focus-visible {
  background: rgba(230, 180, 34, 0.14);
  color: var(--gold-300);
}

.nav-list a[aria-current="page"] {
  background: var(--gold-500);
  color: var(--green-900);
  font-weight: 700;
}

.nav-toggle {
  display: none;
  position: relative;
  align-items: center;
  justify-content: center;
  width: 42px;
  height: 42px;
  border: 1px solid rgba(168, 218, 220, 0.28);
  border-radius: 50%;
  background: transparent;
  cursor: pointer;
  transition: border-color var(--ease), background var(--ease);
}

.nav-toggle:hover,
.nav-toggle:focus-visible {
  border-color: var(--gold-500);
  background: rgba(230, 180, 34, 0.1);
}

.nav-toggle span {
  display: block;
  position: absolute;
  left: 50%;
  top: 50%;
  width: 18px;
  height: 2px;
  margin-left: -9px;
  margin-top: -1px;
  background: var(--ice-500);
  border-radius: 2px;
  transition: transform var(--ease), opacity var(--ease), background var(--ease);
}

.nav-toggle span:nth-child(1) {
  transform: translateY(-6px);
}

.nav-toggle span:nth-child(2) {
  transform: translateY(0);
}

.nav-toggle span:nth-child(3) {
  transform: translateY(6px);
}

.nav-toggle[aria-expanded="true"] span {
  background: var(--gold-300);
}

.nav-toggle[aria-expanded="true"] span:nth-child(1) {
  transform: translateY(0) rotate(45deg);
}

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

.nav-toggle[aria-expanded="true"] span:nth-child(3) {
  transform: translateY(0) rotate(-45deg);
}

/* 平板端头部紧凑 */
@media (min-width: 769px) and (max-width: 1100px) {
  .header-inner {
    padding-left: 16px;
  }

  .brand-mark {
    width: 34px;
    height: 34px;
  }

  .brand-name {
    font-size: 15px;
  }

  .nav-list a {
    padding: 6px 10px;
    font-size: 13px;
  }
}

/* 移动端导航下拉 */
@media (max-width: 768px) {
  .site-header {
    padding: 10px 12px 0;
  }

  .header-inner {
    padding: 6px 6px 6px 16px;
    gap: 8px;
  }

  .brand-mark {
    width: 34px;
    height: 34px;
  }

  .brand-name {
    font-size: 16px;
  }

  .nav-toggle {
    display: flex;
  }

  .site-nav {
    position: absolute;
    top: calc(100% + 6px);
    left: 12px;
    right: 12px;
    z-index: 1001;
    flex-direction: column;
    align-items: stretch;
    padding: 12px;
    max-height: calc(100vh - 88px);
    overflow-y: auto;
    background: rgba(7, 31, 24, 0.97);
    border: 1px solid rgba(168, 218, 220, 0.18);
    border-radius: 16px;
    box-shadow: 0 18px 40px rgba(0, 0, 0, 0.3);
    opacity: 0;
    visibility: hidden;
    transform: translateY(-8px);
    transition: opacity var(--ease-slow), transform var(--ease-slow), visibility var(--ease-slow);
  }

  .site-nav[data-open] {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
  }

  .nav-list {
    flex-direction: column;
    align-items: stretch;
    gap: 2px;
    width: 100%;
  }

  .nav-list a {
    padding: 12px 16px;
    border-radius: 8px;
  }
}

/* ---------- 页脚 ---------- */
.site-footer {
  margin-top: var(--space-3xl);
  padding: 56px 24px 28px;
  background: var(--green-950);
  border-top: 1px solid rgba(168, 218, 220, 0.12);
  color: rgba(245, 243, 239, 0.7);
}

.footer-grid {
  max-width: var(--content-width);
  margin-inline: auto;
  display: grid;
  grid-template-columns: 1.3fr 0.9fr 0.7fr 1.2fr;
  gap: 40px;
  padding-bottom: 36px;
  border-bottom: 1px solid rgba(168, 218, 220, 0.12);
}

.footer-brand .brand {
  margin-bottom: 12px;
}

.footer-tagline {
  margin-top: 12px;
  font-size: 15px;
  color: rgba(245, 243, 239, 0.72);
}

.footer-trust {
  margin-top: 10px;
  font-size: 13px;
  line-height: 1.8;
  color: rgba(245, 243, 239, 0.45);
  font-family: var(--font-data);
}

.footer-title {
  font-family: var(--font-head);
  font-size: 12px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--gold-500);
  margin-bottom: 14px;
}

.footer-nav ul,
.footer-info ul {
  list-style: none;
  margin: 0;
  padding: 0;
}

.footer-nav li,
.footer-info li {
  margin-bottom: 2px;
}

.footer-nav a,
.footer-info a {
  color: rgba(245, 243, 239, 0.8);
  text-decoration: none;
  font-size: 14px;
  line-height: 2;
  transition: color var(--ease);
}

.footer-nav a:hover,
.footer-info a:hover {
  color: var(--gold-300);
}

.contact-line {
  display: flex;
  gap: 8px;
  font-size: 14px;
  line-height: 2;
  color: rgba(245, 243, 239, 0.78);
}

.contact-label {
  color: var(--ice-500);
  font-family: var(--font-data);
  font-size: 12px;
  letter-spacing: 0.06em;
}

.brand--footer .brand-mark {
  width: 34px;
  height: 34px;
}

.brand--footer .brand-name {
  font-size: 16px;
}

.footer-bottom {
  max-width: var(--content-width);
  margin-inline: auto;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 10px 24px;
  padding-top: 20px;
  font-family: var(--font-data);
  font-size: 13px;
  color: rgba(245, 243, 239, 0.5);
}

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

.footer-icp {
  letter-spacing: 0.04em;
}

@media (max-width: 992px) {
  .footer-grid {
    grid-template-columns: 1fr 1fr;
    gap: 32px 40px;
  }
}

@media (max-width: 600px) {
  .site-footer {
    padding: 40px 16px 20px;
  }

  .footer-grid {
    grid-template-columns: 1fr;
    gap: 28px;
  }

  .footer-bottom {
    align-items: flex-start;
  }
}

/* ---------- 按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 10px 22px;
  border: 1px solid transparent;
  border-radius: var(--radius-btn);
  font-family: var(--font-body);
  font-size: 15px;
  font-weight: 600;
  line-height: 1.6;
  text-decoration: none;
  cursor: pointer;
  transition: background var(--ease), color var(--ease), border-color var(--ease);
}

.btn-gold {
  background: var(--gold-500);
  color: var(--green-900);
}

.btn-gold:hover {
  background: var(--gold-300);
  color: var(--green-900);
}

.btn-outline {
  background: transparent;
  border-color: var(--ice-500);
  color: var(--ice-500);
}

.btn-outline:hover {
  background: transparent;
  border-color: var(--gold-300);
  color: var(--gold-300);
}

.btn-sm {
  padding: 6px 14px;
  font-size: 13px;
}

/* ---------- 面包屑 ---------- */
.breadcrumbs {
  margin-bottom: 24px;
  font-family: var(--font-data);
  font-size: 13px;
  color: rgba(245, 243, 239, 0.5);
}

.breadcrumbs a {
  color: var(--ice-500);
  text-decoration: none;
}

.breadcrumbs a:hover {
  color: var(--gold-300);
}

.breadcrumbs [aria-current="page"] {
  color: var(--gold-300);
}

/* ---------- 章节标题 ---------- */
.section-head {
  margin-bottom: 32px;
}

.section-kicker {
  display: block;
  margin-bottom: 6px;
  font-family: var(--font-data);
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--gold-500);
  text-transform: uppercase;
}

.section-title {
  font-family: var(--font-head);
  font-size: clamp(1.75rem, 2.5vw + 1rem, 2.25rem);
  line-height: 1.25;
}

.section-desc {
  margin-top: 8px;
  font-size: 15px;
  color: rgba(245, 243, 239, 0.65);
}

/* ---------- Bento 信息板 ---------- */
.bento-grid {
  display: grid;
  grid-template-columns: repeat(12, 1fr);
  gap: 18px;
}

.bento-card {
  position: relative;
  padding: 24px;
  background: linear-gradient(160deg, rgba(18, 72, 60, 0.9), rgba(11, 59, 46, 0.94));
  border: 1px solid rgba(168, 218, 220, 0.14);
  border-radius: var(--radius-panel);
  overflow: hidden;
  transition: border-color var(--ease-slow), background var(--ease-slow);
}

.bento-card:hover {
  border-color: rgba(230, 180, 34, 0.45);
  background: linear-gradient(160deg, rgba(30, 90, 75, 0.88), rgba(18, 72, 60, 0.94));
}

.bento-main {
  grid-column: span 8;
}

.bento-side {
  grid-column: span 4;
}

.bento-half {
  grid-column: span 6;
}

.bento-third {
  grid-column: span 4;
}

.bento-full {
  grid-column: span 12;
}

.cut-edge {
  --cut-size: 14px;
  clip-path: polygon(0 0, calc(100% - var(--cut-size)) 0, 100% var(--cut-size), 100% 100%, var(--cut-size) 100%, 0 calc(100% - var(--cut-size)));
}

@media (max-width: 1024px) {
  .bento-main {
    grid-column: span 12;
  }

  .bento-side {
    grid-column: span 6;
  }

  .bento-half {
    grid-column: span 12;
  }

  .bento-third {
    grid-column: span 6;
  }
}

@media (max-width: 640px) {
  .bento-grid {
    gap: 14px;
  }

  .bento-card {
    padding: 18px;
  }

  .bento-side,
  .bento-third {
    grid-column: span 12;
  }
}

/* ---------- 数据面板 ---------- */
.data-panel {
  padding: 24px;
  background: rgba(18, 72, 60, 0.6);
  border: 1px solid rgba(168, 218, 220, 0.14);
  border-radius: var(--radius-panel);
}

.data-panel__header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 18px;
}

.data-panel__title {
  font-family: var(--font-data);
  font-size: 13px;
  letter-spacing: 0.08em;
  color: var(--ice-500);
  text-transform: uppercase;
}

.data-panel__value {
  font-family: var(--font-data);
  font-size: 2.2rem;
  font-weight: 700;
  line-height: 1.2;
  color: var(--gold-500);
}

.data-panel__value small {
  font-size: 0.55em;
  color: rgba(245, 243, 239, 0.5);
}

.data-row {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  padding: 10px 0;
  border-bottom: 1px solid rgba(168, 218, 220, 0.12);
}

.data-row:last-child {
  border-bottom: none;
}

.data-label {
  font-family: var(--font-data);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: rgba(245, 243, 239, 0.6);
  text-transform: uppercase;
}

.data-value {
  font-family: var(--font-data);
  font-size: 14px;
  font-weight: 600;
  color: var(--ice-500);
}

.data-value strong {
  color: var(--gold-300);
}

/* ---------- 米白底衬 ---------- */
.panel-light {
  background: var(--cream-100);
  color: var(--ink-900);
}

.panel-light h1,
.panel-light h2,
.panel-light h3,
.panel-light h4 {
  color: var(--ink-900);
}

.panel-light p {
  color: rgba(26, 28, 27, 0.75);
}

.panel-light a {
  color: var(--green-700);
}

.panel-light a:hover {
  color: var(--gold-500);
}

/* ---------- 标签 ---------- */
.tag {
  display: inline-block;
  padding: 4px 10px;
  border-radius: var(--radius-tag);
  border: 1px solid rgba(168, 218, 220, 0.32);
  background: rgba(168, 218, 220, 0.1);
  color: var(--ice-500);
  font-family: var(--font-data);
  font-size: 12px;
  line-height: 1.5;
  letter-spacing: 0.04em;
}

.tag-gold {
  border-color: rgba(230, 180, 34, 0.4);
  background: rgba(230, 180, 34, 0.12);
  color: var(--gold-300);
}

/* ---------- 标签页 ---------- */
.tab-list {
  display: flex;
  gap: 4px;
  list-style: none;
  margin: 0 0 20px;
  padding: 0;
  border-bottom: 1px solid rgba(168, 218, 220, 0.16);
  overflow-x: auto;
}

.tab-btn {
  padding: 10px 16px;
  background: none;
  border: none;
  border-bottom: 2px solid transparent;
  color: rgba(245, 243, 239, 0.6);
  font-size: 14px;
  font-weight: 500;
  white-space: nowrap;
  cursor: pointer;
  transition: color var(--ease), border-color var(--ease);
}

.tab-btn:hover {
  color: var(--ice-500);
}

.tab-btn[aria-selected="true"] {
  color: var(--gold-500);
  border-bottom-color: var(--gold-500);
}

.tab-panel:focus-visible {
  outline-offset: -2px;
}

/* ---------- 媒体占位容器 ---------- */
.media-frame {
  position: relative;
  overflow: hidden;
  background-color: rgba(18, 72, 60, 0.5);
  background-image:
    linear-gradient(45deg, rgba(168, 218, 220, 0.07) 25%, transparent 25%, transparent 75%, rgba(168, 218, 220, 0.07) 75%),
    linear-gradient(45deg, rgba(168, 218, 220, 0.07) 25%, transparent 25%, transparent 75%, rgba(168, 218, 220, 0.07) 75%);
  background-size: 28px 28px;
  background-position: 0 0, 14px 14px;
  border: 1px solid rgba(168, 218, 220, 0.14);
  border-radius: var(--radius-panel);
}

.media-frame::before {
  content: "";
  display: block;
  padding-bottom: 62.5%;
}

.media-frame--wide::before {
  padding-bottom: 56.25%;
}

.media-frame--portrait::before {
  padding-bottom: 125%;
}

.media-frame--square::before {
  padding-bottom: 100%;
}

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

/* ---------- 分隔与装饰 ---------- */
.divider-line {
  border: 0;
  height: 1px;
  margin: 24px 0;
  background: linear-gradient(90deg, rgba(168, 218, 220, 0.25), transparent);
}

.panel-light .divider-line {
  background: linear-gradient(90deg, var(--line-green), transparent);
}

.slash-line {
  height: 2px;
  width: 72px;
  background: var(--gold-500);
  transform: skewX(-14deg);
}

/* ---------- 全站响应与动效偏好 ---------- */
@media (max-width: 600px) {
  :root {
    --content-pad: 16px;
  }

  body {
    background-size: 28px 28px;
  }
}

@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;
  }

  .scroll-progress {
    display: none;
  }
}