/* ================================================================
   星空体育 skyreplay-xk.com.cn
   /assets/site.css —— 全站共享样式
   设计原型：深空任务控制台 / 技术蓝图 / 星芒金信标
   ================================================================ */

/* ---------- 01 · 设计令牌 ---------- */
:root {
  --color-bg: #050A1F;
  --color-bg-secondary: #0A1E3C;
  --color-bg-tertiary: #1E1B4B;
  --color-gold: #E8B96A;
  --color-gold-hover: #F2CA7C;
  --color-purple: #7B6CF6;
  --color-text-primary: #E5EAF2;
  --color-text-secondary: #AEB9C9;
  --color-grid: #22304D;
  --color-glass: rgba(255, 255, 255, 0.06);
  --color-warning: #F2A65A;
  --color-on-gold: #12182D;

  --font-heading: "Noto Sans SC", "Helvetica Neue", "PingFang SC", "Microsoft YaHei", sans-serif;
  --font-body: "Noto Sans SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  --font-editorial: "Noto Serif SC", "Songti SC", "STSong", "SimSun", serif;
  --font-number: "JetBrains Mono", "Space Mono", "Cascadia Code", Consolas, monospace;

  --max-width: 1200px;
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --speed: 0.25s;
}

/* ---------- 02 · Reset 与基础 ---------- */
*,
*::before,
*::after {
  box-sizing: border-box;
}

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

body {
  margin: 0;
  min-height: 100vh;
  overflow-x: hidden;
  font-family: var(--font-body);
  font-size: 1rem;
  line-height: 1.75;
  color: var(--color-text-primary);
  background-color: var(--color-bg);
  background-image:
    radial-gradient(1px 1px at 12% 22%, rgba(255, 255, 255, 0.30), transparent),
    radial-gradient(1px 1px at 32% 45%, rgba(255, 255, 255, 0.18), transparent),
    radial-gradient(1px 1px at 47% 12%, rgba(232, 185, 106, 0.35), transparent),
    radial-gradient(1px 1px at 62% 35%, rgba(255, 255, 255, 0.14), transparent),
    radial-gradient(1px 1px at 78% 28%, rgba(123, 108, 246, 0.35), transparent),
    radial-gradient(1px 1px at 92% 61%, rgba(255, 255, 255, 0.20), transparent),
    radial-gradient(1px 1px at 36% 72%, rgba(255, 255, 255, 0.10), transparent),
    radial-gradient(1px 1px at 68% 88%, rgba(232, 185, 106, 0.18), transparent),
    radial-gradient(1px 1px at 14% 77%, rgba(123, 108, 246, 0.14), transparent),
    radial-gradient(ellipse at 80% 15%, rgba(30, 27, 75, 0.60), transparent 55%),
    radial-gradient(ellipse at 18% 30%, rgba(10, 30, 60, 0.70), transparent 60%);
  font-variant-numeric: tabular-nums;
}

main {
  display: block;
}

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

::selection {
  background: rgba(232, 185, 106, 0.28);
  color: var(--color-text-primary);
}

:focus-visible {
  outline: 2px solid var(--color-gold);
  outline-offset: 2px;
  border-radius: 4px;
}

/* ---------- 03 · 排版 ---------- */
h1,
h2,
h3,
h4,
h5,
h6 {
  margin: 0 0 0.5em;
  font-family: var(--font-heading);
  font-weight: 300;
  line-height: 1.3;
  letter-spacing: 0.06em;
  color: var(--color-text-primary);
}

h1 {
  font-size: clamp(2rem, 4vw, 3.6rem);
}

h2 {
  font-size: clamp(1.4rem, 2.4vw, 2.2rem);
}

h3 {
  font-size: 1.18rem;
  font-weight: 400;
  letter-spacing: 0.04em;
}

p {
  margin: 0 0 1em;
}

a {
  color: var(--color-gold);
  text-decoration: none;
}

a:hover {
  color: var(--color-gold-hover);
  text-decoration: underline;
}

/* ---------- 04 · Skip Link ---------- */
.skip-link {
  position: fixed;
  top: -72px;
  left: 16px;
  z-index: 9999;
  padding: 10px 20px;
  background: var(--color-gold);
  color: var(--color-on-gold);
  font-size: 0.875rem;
  font-weight: 600;
  border-radius: 0 0 10px 10px;
  text-decoration: none;
  transition: top 0.25s ease;
}

.skip-link:focus {
  top: 0;
  outline: none;
  text-decoration: none;
}

/* ---------- 05 · 布局容器与网格 ---------- */
.container {
  width: min(100% - 32px, var(--max-width));
  margin-inline: auto;
}

.section {
  padding-block: clamp(3rem, 6vw, 5rem);
}

.grid {
  display: grid;
  grid-template-columns: repeat(12, 1fr);
  gap: 24px;
}

.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: 1 / -1; }

/* ---------- 06 · 按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 10px 22px;
  border-radius: 10px;
  font-family: var(--font-heading);
  font-size: 0.875rem;
  font-weight: 400;
  letter-spacing: 0.04em;
  line-height: 1.5;
  text-decoration: none;
  cursor: pointer;
  border: 1px solid transparent;
  background: transparent;
  transition:
    background var(--speed) ease,
    color var(--speed) ease,
    border-color var(--speed) ease,
    transform var(--speed) ease,
    box-shadow var(--speed) ease;
}

.btn--primary {
  background: linear-gradient(135deg, #F0C97E, var(--color-gold));
  color: var(--color-on-gold);
  font-weight: 500;
  border-color: transparent;
  box-shadow: 0 4px 20px rgba(232, 185, 106, 0.18);
}

.btn--primary:hover {
  background: linear-gradient(135deg, #F5D69A, #ECBE6E);
  color: var(--color-on-gold);
  transform: translateY(-1px);
  box-shadow: 0 8px 28px rgba(232, 185, 106, 0.24);
  text-decoration: none;
}

.btn--ghost {
  background: rgba(255, 255, 255, 0.03);
  border-color: var(--color-grid);
  color: var(--color-text-primary);
}

.btn--ghost:hover {
  border-color: rgba(232, 185, 106, 0.50);
  color: var(--color-gold);
  background: rgba(232, 185, 106, 0.05);
  text-decoration: none;
}

.btn--sm {
  padding: 6px 14px;
  font-size: 0.8rem;
  border-radius: 8px;
}

/* ---------- 07 · 面包屑 ---------- */
.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  list-style: none;
  margin: 0 0 24px;
  padding: 0;
  font-family: var(--font-number);
  font-size: 0.78rem;
  color: var(--color-text-secondary);
  letter-spacing: 0.04em;
}

.breadcrumb li {
  display: flex;
  align-items: center;
}

.breadcrumb li + li::before {
  content: "/";
  margin: 0 10px;
  color: var(--color-grid);
}

.breadcrumb a {
  color: var(--color-text-secondary);
  text-decoration: none;
}

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

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

/* ---------- 08 · 章节标题 ---------- */
.section-heading {
  display: flex;
  align-items: baseline;
  gap: 16px;
  margin: 0 0 28px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--color-grid);
}

.section-heading__index {
  font-family: var(--font-number);
  font-size: 0.8rem;
  letter-spacing: 0.08em;
  color: var(--color-gold);
  flex-shrink: 0;
}

.section-heading__title {
  margin: 0;
  font-family: var(--font-heading);
  font-size: clamp(1.4rem, 2.4vw, 2.2rem);
  font-weight: 300;
  letter-spacing: 0.06em;
  color: var(--color-text-primary);
  line-height: 1.2;
}

/* ---------- 09 · 图片容器 ---------- */
.img-frame {
  position: relative;
  overflow: hidden;
  border-radius: var(--radius-md);
  background: linear-gradient(140deg, var(--color-bg-secondary), var(--color-bg-tertiary));
  border: 1px solid var(--color-grid);
}

.img-frame--landscape { aspect-ratio: 16 / 9; }
.img-frame--portrait { aspect-ratio: 3 / 4; }
.img-frame--square { aspect-ratio: 1 / 1; }

.img-frame img,
.img-frame picture,
.img-frame video {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.img-frame--placeholder::before {
  content: "IMG / GRID";
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-number);
  font-size: 0.68rem;
  letter-spacing: 0.18em;
  color: var(--color-grid);
  background-image:
    linear-gradient(var(--color-grid) 1px, transparent 1px),
    linear-gradient(90deg, var(--color-grid) 1px, transparent 1px);
  background-size: 24px 24px;
  background-position: center;
}

/* ---------- 10 · 共享头部 ---------- */
.site-header {
  position: sticky;
  top: 10px;
  z-index: 1000;
  margin-top: 10px;
  padding: 0 16px;
}

.site-header__inner {
  position: relative;
  max-width: 1320px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  gap: 12px;
  min-height: 56px;
  padding: 6px 10px 6px 16px;
  background: rgba(7, 14, 36, 0.78);
  border: 1px solid rgba(34, 48, 77, 0.90);
  border-radius: var(--radius-lg);
  backdrop-filter: blur(18px) saturate(140%);
  -webkit-backdrop-filter: blur(18px) saturate(140%);
  box-shadow:
    0 10px 32px rgba(0, 0, 0, 0.38),
    inset 0 0 0 1px rgba(232, 185, 106, 0.06);
}

/* ---------- 11 · 品牌 ---------- */
.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
  color: var(--color-text-primary);
  text-decoration: none;
}

.brand:hover {
  color: var(--color-text-primary);
  text-decoration: none;
}

.brand__mark {
  position: relative;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 34px;
  height: 34px;
  border: 1px solid rgba(232, 185, 106, 0.72);
  border-radius: 50%;
  flex-shrink: 0;
}

.brand__mark::before {
  content: "";
  width: 10px;
  height: 10px;
  background: var(--color-gold);
  clip-path: polygon(50% 0%, 61% 39%, 100% 50%, 61% 61%, 50% 100%, 39% 61%, 0% 50%, 39% 39%);
  filter: drop-shadow(0 0 6px rgba(232, 185, 106, 0.65));
}

.brand__mark::after {
  content: "";
  position: absolute;
  inset: -4px;
  border: 1px dashed rgba(232, 185, 106, 0.26);
  border-radius: 50%;
  animation: brand-orbit 14s linear infinite;
}

@keyframes brand-orbit {
  to { transform: rotate(360deg); }
}

.brand__text {
  display: inline-flex;
  flex-direction: column;
  line-height: 1.15;
}

.brand__text strong {
  font-family: var(--font-heading);
  font-size: 1rem;
  font-weight: 400;
  letter-spacing: 0.12em;
  color: var(--color-text-primary);
}

.brand__text small {
  font-family: var(--font-number);
  font-size: 0.62rem;
  letter-spacing: 0.22em;
  color: var(--color-text-secondary);
  text-transform: uppercase;
}

/* ---------- 12 · 主导航 ---------- */
.site-nav {
  margin-inline: auto;
  min-width: 0;
}

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

.site-nav__item {
  margin: 0;
}

.site-nav__link {
  position: relative;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 10px;
  font-family: var(--font-heading);
  font-size: 0.875rem;
  letter-spacing: 0.06em;
  color: var(--color-text-secondary);
  text-decoration: none;
  white-space: nowrap;
  border-radius: 6px;
  transition:
    color var(--speed) ease,
    background var(--speed) ease;
}

.site-nav__link::before {
  content: attr(data-index);
  font-family: var(--font-number);
  font-size: 0.68rem;
  color: var(--color-grid);
  letter-spacing: 0.04em;
  transition: color var(--speed) ease;
}

.site-nav__link:hover {
  color: var(--color-text-primary);
  background: var(--color-glass);
  text-decoration: none;
}

.site-nav__link:hover::before {
  color: var(--color-purple);
}

.site-nav__link[aria-current="page"] {
  color: var(--color-gold);
  background: rgba(232, 185, 106, 0.07);
}

.site-nav__link[aria-current="page"]::before {
  color: var(--color-gold);
}

.site-nav__link[aria-current="page"]::after {
  content: "";
  position: absolute;
  left: 12px;
  right: 12px;
  bottom: 2px;
  height: 2px;
  background: var(--color-gold);
  border-radius: 2px;
}

/* ---------- 13 · 头部状态区 ---------- */
.site-header__utils {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
}

.status-chip {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 4px 12px 4px 10px;
  border: 1px solid rgba(232, 185, 106, 0.28);
  border-radius: 999px;
  background: rgba(232, 185, 106, 0.10);
  color: var(--color-gold);
  font-family: var(--font-heading);
  font-size: 0.72rem;
  letter-spacing: 0.08em;
  white-space: nowrap;
  line-height: 1.6;
}

.status-chip__dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--color-gold);
  animation: pulse 2.2s ease-out infinite;
}

@keyframes pulse {
  0%, 100% {
    box-shadow: 0 0 0 0 rgba(232, 185, 106, 0.55);
  }
  50% {
    box-shadow: 0 0 0 4px rgba(232, 185, 106, 0);
  }
}

/* ---------- 14 · 汉堡按钮 ---------- */
.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 4px;
  width: 40px;
  height: 40px;
  padding: 0;
  background: transparent;
  border: 1px solid var(--color-grid);
  border-radius: 10px;
  cursor: pointer;
  transition: border-color var(--speed) ease;
}

.nav-toggle:hover {
  border-color: rgba(232, 185, 106, 0.50);
}

.nav-toggle__bar {
  display: block;
  width: 18px;
  height: 2px;
  background: var(--color-text-primary);
  border-radius: 2px;
  transition:
    transform 0.25s ease,
    opacity 0.2s ease,
    background 0.2s ease;
}

.nav-toggle:hover .nav-toggle__bar {
  background: var(--color-gold);
}

.nav-toggle[aria-expanded="true"] .nav-toggle__bar:nth-child(1) {
  transform: translateY(6px) 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(-6px) rotate(-45deg);
}

/* ---------- 15 · 滚动进度条 ---------- */
.scroll-progress {
  position: fixed;
  top: 0;
  left: 0;
  width: 0;
  height: 2px;
  z-index: 1001;
  background: linear-gradient(90deg, var(--color-gold) 0%, var(--color-purple) 100%);
  border-radius: 0 2px 2px 0;
  pointer-events: none;
  box-shadow: 0 0 8px rgba(232, 185, 106, 0.35);
}

/* ---------- 16 · 响应式头部（移动导航） ---------- */
@media (max-width: 860px) {
  .site-header {
    top: 0;
    margin-top: 0;
    padding: 8px 12px;
  }

  .site-header__inner {
    border-radius: var(--radius-md);
    padding-left: 12px;
  }

  .site-nav {
    position: absolute;
    top: calc(100% + 6px);
    left: 0;
    right: 0;
    z-index: 20;
    margin-inline: 0;
    padding: 10px 12px;
    background: rgba(7, 14, 36, 0.96);
    border: 1px solid rgba(232, 185, 106, 0.18);
    border-radius: var(--radius-md);
    box-shadow: 0 18px 40px rgba(0, 0, 0, 0.40);
    opacity: 0;
    visibility: hidden;
    transform: translateY(-6px);
    transition:
      opacity 0.25s ease,
      transform 0.25s ease,
      visibility 0.25s;
  }

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

  .site-nav__list {
    flex-direction: column;
    align-items: stretch;
    gap: 2px;
  }

  .site-nav__link {
    justify-content: flex-start;
    padding: 11px 14px;
    border-radius: 8px;
    border-bottom: 1px solid rgba(34, 48, 77, 0.50);
  }

  .site-nav__item:last-child .site-nav__link {
    border-bottom: none;
  }

  .site-nav__link[aria-current="page"] {
    background: rgba(232, 185, 106, 0.08);
  }

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

  .nav-toggle {
    display: inline-flex;
  }
}

@media (max-width: 520px) {
  .status-chip {
    display: none;
  }

  .brand__text small {
    display: none;
  }
}

/* ---------- 17 · 共享页脚 ---------- */
.site-footer {
  margin-top: clamp(60px, 8vw, 96px);
  position: relative;
  overflow: hidden;
  background: linear-gradient(180deg, rgba(6, 12, 30, 0.94) 0%, rgba(4, 8, 22, 0.98) 100%);
  border-top: 1px solid var(--color-grid);
}

.site-footer::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: min(320px, 40vw);
  height: 1px;
  background: linear-gradient(90deg, var(--color-gold), transparent);
  box-shadow: 0 0 8px rgba(232, 185, 106, 0.30);
}

.site-footer__inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: clamp(40px, 6vw, 64px) 16px 32px;
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1.5fr;
  gap: 40px 32px;
}

.site-footer__brand {
  padding-right: 16px;
}

.site-footer__logo {
  margin: 0;
  display: flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-heading);
  font-size: 1.35rem;
  font-weight: 300;
  letter-spacing: 0.14em;
  color: var(--color-text-primary);
}

.site-footer__logo::before {
  content: "";
  width: 14px;
  height: 14px;
  background: var(--color-gold);
  clip-path: polygon(50% 0%, 61% 39%, 100% 50%, 61% 61%, 50% 100%, 39% 61%, 0% 50%, 39% 39%);
  filter: drop-shadow(0 0 6px rgba(232, 185, 106, 0.50));
}

.site-footer__en {
  display: block;
  margin-top: 4px;
  font-family: var(--font-number);
  font-size: 0.68rem;
  letter-spacing: 0.28em;
  color: var(--color-text-secondary);
}

.site-footer__desc {
  margin-top: 14px;
  max-width: 32em;
  font-size: 0.875rem;
  line-height: 1.8;
  color: var(--color-text-secondary);
}

.site-footer__heading {
  margin: 0 0 16px;
  font-family: var(--font-number);
  font-size: 0.72rem;
  font-weight: 500;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--color-text-secondary);
}

.site-footer__list {
  list-style: none;
  margin: 0;
  padding: 0;
}

.site-footer__list li {
  margin-bottom: 8px;
}

.site-footer__list a {
  display: inline-block;
  color: var(--color-text-primary);
  font-size: 0.875rem;
  text-decoration: none;
  transition:
    color var(--speed) ease,
    padding-left var(--speed) ease;
}

.site-footer__list a:hover {
  color: var(--color-gold);
  padding-left: 4px;
}

.site-footer__contact {
  list-style: none;
  margin: 0;
  padding: 0;
}

.site-footer__contact li {
  display: flex;
  gap: 10px;
  margin-bottom: 10px;
  font-size: 0.85rem;
  color: var(--color-text-primary);
  line-height: 1.6;
  word-break: break-word;
}

.site-footer__label {
  flex-shrink: 0;
  min-width: 2.6em;
  font-family: var(--font-number);
  font-size: 0.70rem;
  letter-spacing: 0.08em;
  color: var(--color-gold);
  padding-top: 4px;
}

.site-footer__trust {
  margin-top: 14px;
  padding-left: 12px;
  border-left: 2px solid var(--color-purple);
  font-size: 0.80rem;
  line-height: 1.7;
  color: var(--color-text-secondary);
}

.site-footer__bottom {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 18px 16px;
  border-top: 1px solid var(--color-grid);
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  font-family: var(--font-number);
  font-size: 0.78rem;
  letter-spacing: 0.04em;
  color: var(--color-text-secondary);
}

.site-footer__bottom p {
  margin: 0;
}

/* ---------- 18 · 页脚响应式 ---------- */
@media (max-width: 900px) {
  .site-footer__inner {
    grid-template-columns: 1fr 1fr;
  }

  .col-3,
  .col-4 {
    grid-column: span 6;
  }

  .col-5,
  .col-6,
  .col-7,
  .col-8,
  .col-9 {
    grid-column: 1 / -1;
  }
}

@media (max-width: 560px) {
  .site-footer__inner {
    grid-template-columns: 1fr;
    gap: 28px;
  }

  .site-footer__bottom {
    flex-direction: column;
    text-align: center;
  }

  .col-3,
  .col-4,
  .col-5,
  .col-6,
  .col-7,
  .col-8,
  .col-9 {
    grid-column: 1 / -1;
  }
}

/* ---------- 19 · 滚动显现 ---------- */
html.js-reveal [data-reveal] {
  opacity: 0;
  transform: translateY(16px);
  transition:
    opacity 0.4s ease,
    transform 0.4s ease;
  will-change: opacity, transform;
}

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

/* ---------- 20 · 减弱动效 ---------- */
@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;
  }

  .brand__mark::after,
  .status-chip__dot {
    animation: none;
  }

  html.js-reveal [data-reveal],
  .site-nav,
  .site-nav[data-open="true"] {
    opacity: 1;
    transform: none;
    transition: none;
  }
}