/* =========================================================
   乐竞中国区官网 · 全站共享 Site Kit
   文件：/assets/site.css
   设计语言：实时数据杂志 / 左右分屏 / 斜切 / 霓虹信号
   ========================================================= */

/* ---------- 设计变量 ---------- */
:root {
  --color-bg-deep: #0B1F3A;
  --color-bg-panel: #12294D;
  --color-bg-line: #1A3460;
  --color-accent-green: #3DFF83;
  --color-accent-orange: #FF5A1F;
  --color-body-text: #E8F0F8;
  --color-text-muted: #8DA4BC;
  --color-white: #FFFFFF;
  --color-bg-black: #040A14;
  --color-flow-cyan: #64E1FF;
  --grid-line: rgba(26, 52, 96, 0.5);

  --font-headings: "Oswald", "Noto Sans SC", "Microsoft YaHei", sans-serif;
  --font-body: "Inter", "Noto Sans SC", "Microsoft YaHei", sans-serif;
  --font-mono: "JetBrains Mono", "SFMono-Regular", Consolas, "Liberation Mono", monospace;

  --space-1: 8px;
  --space-2: 16px;
  --space-3: 24px;
  --space-4: 32px;
  --space-5: 48px;
  --space-6: 64px;
  --space-7: 96px;

  --radius-sm: 8px;
  --radius-md: 16px;
  --radius-lg: 28px;
  --radius-pill: 999px;

  --container-max: 1400px;
  --container-pad: clamp(20px, 4vw, 48px);

  --transition-fast: 0.2s ease;
  --transition-base: 0.3s ease;
}

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

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

body {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  background-color: var(--color-bg-deep);
  background-image:
    radial-gradient(900px 420px at 85% -10%, rgba(61, 255, 131, 0.06), transparent 60%),
    linear-gradient(var(--grid-line) 1px, transparent 1px),
    linear-gradient(90deg, var(--grid-line) 1px, transparent 1px);
  background-size: auto, 48px 48px, 48px 48px;
  color: var(--color-body-text);
  font-family: var(--font-body);
  font-size: 18px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

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

button {
  font-family: inherit;
}

/* ---------- 全局状态 ---------- */
:focus-visible {
  outline: 3px solid var(--color-accent-orange);
  outline-offset: 2px;
  border-radius: 4px;
}

::selection {
  background: var(--color-accent-green);
  color: var(--color-bg-black);
}

/* ---------- 基础排版 ---------- */
h1,
h2,
h3,
h4 {
  font-family: var(--font-headings);
  color: var(--color-white);
  margin: 0 0 0.5em;
}

h1 {
  font-size: clamp(40px, 6vw, 64px);
  font-weight: 900;
  line-height: 1;
  letter-spacing: 0.01em;
}

h2 {
  font-size: clamp(30px, 4vw, 48px);
  font-weight: 600;
  line-height: 1.1;
}

h3 {
  font-size: 24px;
  font-weight: 600;
}

p {
  margin-bottom: 1em;
}

a {
  color: var(--color-flow-cyan);
  transition: color var(--transition-fast);
}

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

/* ---------- 工具类 ---------- */
.site-container {
  max-width: var(--container-max);
  margin-inline: auto;
  padding-inline: var(--container-pad);
}

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
  border: 0;
}

.mono {
  font-family: var(--font-mono);
}

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

.text-white {
  color: var(--color-white);
}

.text-green {
  color: var(--color-accent-green);
}

.text-orange {
  color: var(--color-accent-orange);
}

.site-section {
  padding-block: clamp(48px, 8vw, 104px);
}

.site-section--tight {
  padding-block: clamp(32px, 5vw, 64px);
}

.section-slant {
  position: relative;
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 40px), 0 100%);
}

.section-slant--flip {
  position: relative;
  clip-path: polygon(0 40px, 100% 0, 100% 100%, 0 100%);
}

.glow-line {
  display: block;
  height: 2px;
  border: 0;
  background: linear-gradient(90deg, transparent 0%, rgba(61, 255, 131, 0.55) 25%, rgba(100, 225, 255, 0.5) 50%, rgba(255, 90, 31, 0.4) 75%, transparent 100%);
}

/* ---------- 网格 ---------- */
.grid-auto {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  gap: var(--space-4);
}

.split-layout {
  display: grid;
  grid-template-columns: repeat(12, 1fr);
  gap: clamp(24px, 4vw, 64px);
  align-items: start;
}

.split-layout__primary {
  grid-column: 1 / span 6;
}

.split-layout__secondary {
  grid-column: 7 / -1;
}

/* ---------- 顶部数据状态条 ---------- */
.status-strip {
  position: sticky;
  top: 0;
  z-index: 400;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
  padding: 8px var(--container-pad);
  background: var(--color-bg-black);
  border-bottom: 1px solid var(--color-bg-line);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.12em;
  color: var(--color-text-muted);
}

.status-strip__dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--color-accent-green);
  animation: pulse-dot 2.4s ease-out infinite;
}

@keyframes pulse-dot {
  0%, 100% {
    box-shadow: 0 0 0 0 rgba(61, 255, 131, 0.45);
  }
  50% {
    box-shadow: 0 0 0 7px rgba(61, 255, 131, 0);
  }
}

.status-strip__message {
  color: var(--color-body-text);
}

.status-strip__divider {
  width: 36px;
  height: 1px;
  background: var(--color-accent-green);
  transform: skewX(-30deg);
  opacity: 0.6;
}

.status-strip__extra {
  color: var(--color-text-muted);
}

/* ---------- 刊头 ---------- */
.site-header {
  position: relative;
  background: linear-gradient(180deg, var(--color-bg-black) 0%, #0D2240 30%, var(--color-bg-deep) 100%);
  border-bottom: 1px solid var(--color-bg-line);
}

.skip-link {
  position: fixed;
  top: -120px;
  left: 16px;
  z-index: 500;
  padding: 12px 20px;
  border-radius: 0 0 var(--radius-md) var(--radius-md);
  background: var(--color-accent-green);
  color: var(--color-bg-black);
  font-weight: 700;
  font-size: 14px;
  text-decoration: none;
  transition: top var(--transition-fast);
}

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

.masthead {
  padding: clamp(24px, 5vw, 56px) 0 clamp(16px, 3vw, 28px);
  text-align: center;
}

.masthead__brand {
  position: relative;
  display: inline-flex;
  flex-direction: column;
  align-items: center;
  text-decoration: none;
  color: var(--color-white);
}

.masthead__name {
  font-family: var(--font-headings);
  font-size: clamp(52px, 11vw, 92px);
  font-weight: 900;
  line-height: 0.9;
  letter-spacing: 0.08em;
  color: var(--color-white);
  text-shadow: 0 0 16px rgba(100, 225, 255, 0.18), 0 0 40px rgba(61, 255, 131, 0.08);
}

.masthead__kicker {
  margin-top: 10px;
  font-family: var(--font-mono);
  font-size: clamp(10px, 1.6vw, 12px);
  letter-spacing: 0.42em;
  text-transform: uppercase;
  color: var(--color-flow-cyan);
}

@media (min-width: 1200px) {
  .masthead__brand::before,
  .masthead__brand::after {
    content: "";
    position: absolute;
    top: 50%;
    width: clamp(60px, 10vw, 140px);
    height: 1px;
  }

  .masthead__brand::before {
    right: calc(100% + 36px);
    background: linear-gradient(90deg, transparent, var(--color-accent-green));
  }

  .masthead__brand::after {
    left: calc(100% + 36px);
    background: linear-gradient(90deg, var(--color-accent-green), transparent);
  }
}

.site-header__navrow {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 54px;
  border-top: 1px solid var(--color-bg-line);
  border-bottom: 1px solid var(--color-bg-line);
}

.main-nav {
  display: flex;
  align-items: center;
  justify-content: center;
}

.main-nav::before,
.main-nav::after {
  content: "";
  display: block;
  width: clamp(48px, 6vw, 96px);
  height: 2px;
  margin-inline: 18px;
  background: linear-gradient(90deg, transparent, var(--color-accent-green) 30%, transparent 70%);
  transform: skewX(-28deg);
  opacity: 0.75;
}

.main-nav__list {
  display: flex;
  align-items: center;
  justify-content: center;
  flex-wrap: wrap;
  gap: 2px;
  list-style: none;
}

.main-nav__link {
  position: relative;
  display: block;
  padding: 14px 18px;
  color: var(--color-body-text);
  font-size: 15px;
  font-weight: 500;
  letter-spacing: 0.12em;
  text-decoration: none;
  white-space: nowrap;
  transition: color var(--transition-fast);
}

.main-nav__link::after {
  content: "";
  position: absolute;
  right: 18px;
  bottom: 8px;
  left: 18px;
  height: 2px;
  border-radius: 2px;
  background: var(--color-accent-green);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--transition-base);
}

.main-nav__link:hover {
  color: var(--color-white);
}

.main-nav__link:hover::after,
.main-nav__link:focus-visible::after {
  transform: scaleX(1);
}

.main-nav__link[aria-current="page"] {
  color: var(--color-white);
}

.main-nav__link[aria-current="page"]::after {
  transform: scaleX(1);
}

.nav-toggle {
  display: none;
  align-items: center;
  gap: 10px;
  padding: 10px 18px;
  background: var(--color-bg-panel);
  border: 1px solid var(--color-bg-line);
  border-radius: var(--radius-pill);
  color: var(--color-body-text);
  font-size: 14px;
  line-height: 1;
  cursor: pointer;
  transition: border-color var(--transition-fast), background var(--transition-fast);
}

.nav-toggle:hover,
.nav-toggle[aria-expanded="true"] {
  border-color: var(--color-accent-green);
  background: var(--color-bg-deep);
}

.nav-toggle__bars {
  display: flex;
  flex-direction: column;
  gap: 4px;
  width: 16px;
}

.nav-toggle__bar {
  height: 2px;
  border-radius: 2px;
  background: var(--color-accent-green);
  transition: transform var(--transition-fast), opacity var(--transition-fast);
}

.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);
}

/* 移动导航 */
@media (max-width: 900px) {
  .site-header__navrow {
    justify-content: flex-end;
  }

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

  .main-nav::before,
  .main-nav::after {
    display: none;
  }

  .main-nav {
    position: absolute;
    top: calc(100% + 8px);
    right: 0;
    left: 0;
    z-index: 120;
    padding: 10px;
    background: var(--color-bg-panel);
    border: 1px solid var(--color-bg-line);
    border-radius: 0 0 var(--radius-lg) var(--radius-lg);
    box-shadow: 0 24px 48px rgba(4, 10, 20, 0.55);
    opacity: 0;
    visibility: hidden;
    transform: translateY(-8px);
    transition: opacity var(--transition-fast), transform var(--transition-fast), visibility var(--transition-fast);
  }

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

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

  .main-nav__link {
    padding: 12px 18px;
    border-radius: var(--radius-sm);
  }

  .main-nav__link::after {
    display: none;
  }

  .main-nav__link:hover {
    background: var(--color-bg-deep);
  }

  .main-nav__link[aria-current="page"] {
    background: rgba(61, 255, 131, 0.08);
  }
}

/* ---------- 滚动进度 / 返回顶部 ---------- */
.scroll-progress {
  position: fixed;
  top: 0;
  left: 0;
  z-index: 600;
  width: 0%;
  height: 3px;
  background: linear-gradient(90deg, var(--color-flow-cyan), var(--color-accent-green) 70%, var(--color-accent-orange));
  pointer-events: none;
}

.back-to-top {
  position: fixed;
  right: 24px;
  bottom: 24px;
  z-index: 550;
  display: grid;
  place-items: center;
  width: 46px;
  height: 46px;
  border: 1px solid var(--color-bg-line);
  border-radius: 50%;
  background: var(--color-bg-panel);
  color: var(--color-accent-green);
  font-size: 20px;
  line-height: 1;
  cursor: pointer;
  opacity: 0;
  visibility: hidden;
  transform: translateY(10px);
  transition: opacity var(--transition-base), transform var(--transition-base), visibility var(--transition-base), border-color var(--transition-fast);
}

.back-to-top:hover {
  border-color: var(--color-accent-green);
}

.back-to-top.is-visible {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

/* ---------- 页脚 ---------- */
.site-footer {
  margin-top: auto;
  background: var(--color-bg-black);
  border-top: 1px solid var(--color-bg-line);
  color: var(--color-text-muted);
  font-size: 15px;
  line-height: 1.7;
}

.site-footer::before {
  content: "";
  display: block;
  height: 3px;
  background: linear-gradient(90deg, transparent 0%, var(--color-accent-green) 15%, var(--color-flow-cyan) 50%, rgba(255, 90, 31, 0.6) 85%, transparent 100%);
}

.site-footer__inner {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr;
  gap: clamp(32px, 5vw, 64px);
  max-width: var(--container-max);
  margin-inline: auto;
  padding: clamp(40px, 6vw, 64px) var(--container-pad) clamp(32px, 5vw, 48px);
}

.site-footer__col {
  min-width: 0;
}

.site-footer__col--brand {
  max-width: 44ch;
}

.site-footer__brand {
  margin-bottom: 12px;
  font-family: var(--font-headings);
  font-size: 32px;
  font-weight: 900;
  letter-spacing: 0.06em;
  color: var(--color-white);
}

.site-footer__tagline {
  margin-bottom: 10px;
  color: var(--color-body-text);
}

.site-footer__trust {
  font-size: 14px;
}

.site-footer__heading {
  margin-bottom: 16px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--color-bg-line);
  font-family: var(--font-headings);
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--color-white);
}

.site-footer__copyright,
.site-footer__icp,
.site-footer__contact {
  margin-bottom: 6px;
}

.site-footer__links {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin-bottom: 16px;
  list-style: none;
}

.site-footer__link {
  color: var(--color-text-muted);
  text-decoration: none;
  transition: color var(--transition-fast);
}

.site-footer__link:hover {
  color: var(--color-accent-green);
}

.site-footer__contact {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.04em;
  color: var(--color-flow-cyan);
}

/* ---------- 通用按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 28px;
  border: 1px solid transparent;
  border-radius: var(--radius-pill);
  font-family: var(--font-body);
  font-size: 16px;
  font-weight: 600;
  line-height: 1.2;
  text-decoration: none;
  cursor: pointer;
  transition: background var(--transition-fast), color var(--transition-fast), border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.btn--primary {
  background: var(--color-accent-green);
  color: var(--color-bg-black);
}

.btn--primary:hover {
  background: var(--color-white);
  color: var(--color-bg-black);
  box-shadow: 0 0 0 4px rgba(61, 255, 131, 0.15);
}

.btn--ghost {
  background: transparent;
  border-color: var(--color-bg-line);
  color: var(--color-body-text);
}

.btn--ghost:hover {
  background: rgba(61, 255, 131, 0.06);
  border-color: var(--color-accent-green);
  color: var(--color-accent-green);
}

/* ---------- 面包屑 ---------- */
.breadcrumbs {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-bottom: 24px;
  list-style: none;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.08em;
  color: var(--color-text-muted);
}

.breadcrumbs li {
  display: flex;
  align-items: center;
  gap: 12px;
}

.breadcrumbs li + li::before {
  content: "/";
  color: var(--color-bg-line);
}

.breadcrumbs a {
  color: var(--color-text-muted);
  text-decoration: none;
  transition: color var(--transition-fast);
}

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

/* ---------- 子页首屏 ---------- */
.page-hero {
  position: relative;
  padding: clamp(40px, 7vw, 88px) 0 clamp(32px, 5vw, 64px);
  border-bottom: 1px solid var(--color-bg-line);
}

.page-hero::after {
  content: "";
  position: absolute;
  right: 0;
  bottom: -1px;
  width: clamp(120px, 30vw, 320px);
  height: 3px;
  background: linear-gradient(90deg, transparent, var(--color-accent-green));
}

.page-hero__title {
  max-width: 18ch;
  margin-bottom: 16px;
}

.page-hero__intro {
  max-width: 64ch;
  color: var(--color-text-muted);
}

/* ---------- 章节标 ---------- */
.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 16px;
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 500;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--color-flow-cyan);
}

.eyebrow::before {
  content: "";
  width: 36px;
  height: 2px;
  background: var(--color-accent-green);
  transform: skewX(-30deg);
}

/* ---------- 信息卡片 ---------- */
.card {
  position: relative;
  padding: 28px;
  border: 1px solid var(--color-bg-line);
  border-radius: var(--radius-lg);
  background: var(--color-bg-panel);
  transition: border-color var(--transition-base), background var(--transition-base), transform var(--transition-base);
}

.card:hover {
  border-color: rgba(61, 255, 131, 0.35);
  background: linear-gradient(180deg, var(--color-bg-panel) 0%, rgba(61, 255, 131, 0.05) 100%);
  transform: translateY(-2px);
}

.card__title {
  margin-bottom: 10px;
  font-family: var(--font-headings);
  font-size: 22px;
  font-weight: 600;
  color: var(--color-white);
}

.card__text {
  margin-bottom: 18px;
  font-size: 15px;
  color: var(--color-text-muted);
}

.card__link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 15px;
  font-weight: 600;
  color: var(--color-accent-green);
  text-decoration: none;
  transition: gap var(--transition-fast), color var(--transition-fast);
}

.card__link:hover {
  gap: 12px;
  color: var(--color-white);
}

/* ---------- 标签 / 数据 ---------- */
.tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 12px;
  border: 1px solid var(--color-bg-line);
  border-radius: var(--radius-pill);
  background: transparent;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--color-text-muted);
}

.tag--green {
  border-color: rgba(61, 255, 131, 0.45);
  background: rgba(61, 255, 131, 0.08);
  color: var(--color-accent-green);
}

.tag--orange {
  border-color: rgba(255, 90, 31, 0.45);
  background: rgba(255, 90, 31, 0.08);
  color: var(--color-accent-orange);
}

.tag--cyan {
  border-color: rgba(100, 225, 255, 0.45);
  background: rgba(100, 225, 255, 0.08);
  color: var(--color-flow-cyan);
}

.data-number {
  font-family: var(--font-mono);
  font-size: clamp(32px, 4vw, 46px);
  font-weight: 700;
  line-height: 1.05;
  letter-spacing: -0.02em;
  color: var(--color-white);
}

.data-number--green {
  color: var(--color-accent-green);
}

.data-number--orange {
  color: var(--color-accent-orange);
}

.data-number--cyan {
  color: var(--color-flow-cyan);
}

.data-label {
  display: block;
  margin-top: 6px;
  font-size: 13px;
  letter-spacing: 0.08em;
  color: var(--color-text-muted);
}

/* ---------- 图片容器 ---------- */
.image-frame {
  position: relative;
  overflow: hidden;
  aspect-ratio: 4 / 3;
  border: 1px solid var(--color-bg-line);
  border-radius: var(--radius-lg);
  background-color: var(--color-bg-panel);
  background-image:
    linear-gradient(45deg, rgba(61, 255, 131, 0.05) 25%, transparent 25%),
    linear-gradient(-45deg, rgba(100, 225, 255, 0.05) 25%, transparent 25%);
  background-size: 28px 28px;
}

.image-frame--wide {
  aspect-ratio: 16 / 9;
}

.image-frame--tall {
  aspect-ratio: 3 / 4;
}

.image-frame--hero {
  aspect-ratio: 16 / 10;
}

.image-frame img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.image-frame__caption {
  position: absolute;
  right: 12px;
  bottom: 12px;
  padding: 6px 12px;
  border-radius: var(--radius-pill);
  background: rgba(4, 10, 20, 0.72);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--color-body-text);
}

/* ---------- 主内容 / 滚动显现 ---------- */
.main-content,
#main-content {
  flex: 1;
}

[data-reveal] {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity 0.5s ease, transform 0.5s ease;
}

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

/* ---------- 响应式 ---------- */
@media (max-width: 900px) {
  .split-layout {
    grid-template-columns: 1fr;
  }

  .split-layout__primary,
  .split-layout__secondary {
    grid-column: 1;
  }

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

@media (max-width: 640px) {
  .status-strip {
    font-size: 11px;
    gap: 8px;
  }

  .status-strip__divider,
  .status-strip__extra {
    display: none;
  }

  .back-to-top {
    right: 16px;
    bottom: 16px;
    width: 42px;
    height: 42px;
  }
}

/* ---------- 减少动态 ---------- */
@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  *,
  *::before,
  *::after {
    animation-duration: 0.001s !important;
    animation-delay: 0s !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001s !important;
    transition-delay: 0s !important;
  }

  .status-strip__dot {
    animation: none;
  }

  [data-reveal] {
    opacity: 1 !important;
    transform: none !important;
  }
}