/*
 * 环球直播落地页样式（tiyu.shijiebeizb1.top）
 * - 纯静态、零外部依赖；CSP: default-src 'self'; style-src 'self'; script-src 'none'。
 * - 品牌色与环球主站一致（#37a4fc / #318afb）。
 * - 首屏为“夜场转播”深色舞台，浅 / 深色模式只切换下方内容区；斜切边与斜向光带呼应 HQ 标志的速度线。
 */

:root {
  color-scheme: light dark;

  --brand: #37a4fc;
  --brand-strong: #318afb;
  --brand-ink: #1570e8;
  --brand-deep: #0b5fd6;
  --cyan: #00b4ff;
  --gold: #ffd36b;

  --navy-950: #050c19;
  --navy-900: #081428;
  --navy-800: #0d1f3d;
  --on-navy: #ffffff;
  --on-navy-soft: rgb(214 228 250 / 84%);
  --on-navy-mute: rgb(214 228 250 / 72%);

  --bg: #eef4fc;
  --surface: #ffffff;
  --text: #152033;
  --muted: #55627a;
  --line: #d9e3f1;
  --label: #0b5fd6;
  --card-shadow: 0 1px 2px rgb(16 40 80 / 6%), 0 10px 28px rgb(16 40 80 / 7%);
  --focus: #0b5fd6;

  --gutter: 16px;
  --max: 1120px;
  --topbar-h: 60px;
  --cut: 28px;

  --font: "PingFang SC", "HarmonyOS Sans SC", "MiSans", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans CJK SC", "Source Han Sans SC", system-ui, -apple-system, "Segoe UI", sans-serif;
  --font-latin: "SF Pro Display", "Segoe UI", "Roboto", "Helvetica Neue", Arial, "PingFang SC", "Microsoft YaHei", sans-serif;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0b1424;
    --surface: #111c2f;
    --text: #e7eef9;
    --muted: #9eacc3;
    --line: #1f2c42;
    --label: #6cbcff;
    --card-shadow: none;
    --focus: #ffd36b;
  }
}

@media (min-width: 768px) {
  :root {
    --gutter: 32px;
    --topbar-h: 72px;
    --cut: 48px;
  }
}

/* ---------- 基础 ---------- */

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  -webkit-text-size-adjust: 100%;
  text-size-adjust: 100%;
  overflow-x: clip;
}

body {
  margin: 0;
  min-height: 100vh;
  overflow-x: clip;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font);
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

h1,
h2,
h3,
p,
ul {
  margin: 0;
}

p {
  text-wrap: pretty;
}

ul {
  padding: 0;
  list-style: none;
}

img,
svg {
  display: block;
}

a {
  color: inherit;
  text-decoration: none;
  -webkit-tap-highlight-color: transparent;
}

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

.icon {
  flex: none;
}

.sprite {
  position: absolute;
  width: 0;
  height: 0;
  overflow: hidden;
}

.wrap {
  width: 100%;
  max-width: calc(var(--max) + var(--gutter) * 2);
  margin-inline: auto;
  padding-inline: max(var(--gutter), env(safe-area-inset-left)) max(var(--gutter), env(safe-area-inset-right));
}

.skip-link {
  position: absolute;
  top: 8px;
  left: 8px;
  z-index: 100;
  padding: 10px 16px;
  border-radius: 10px;
  background: #ffffff;
  color: #0b2348;
  font-weight: 700;
  transform: translateY(-160%);
  transition: transform 0.2s ease;
}

.skip-link:focus-visible {
  --focus: #ffd36b;
  transform: none;
}

/* ---------- 顶栏（叠在首屏之上） ---------- */

.topbar {
  --focus: #ffd36b;

  position: absolute;
  inset: 0 0 auto;
  z-index: 10;
  padding-top: env(safe-area-inset-top);
  color: var(--on-navy);
}

.topbar__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  height: var(--topbar-h);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  min-width: 0;
  border-radius: 10px;
}

.brand__mark {
  width: 32px;
  height: 32px;
}

.brand__name {
  font-size: 22px;
  font-weight: 900;
  letter-spacing: 0.04em;
  transform: skewX(-8deg);
}

.brand__domain {
  padding: 2px 8px;
  border: 1px solid rgb(120 190 255 / 32%);
  border-radius: 999px;
  color: rgb(186 216 255 / 90%);
  font-family: var(--font-latin);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.14em;
}

.topbar__link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  min-height: 40px;
  padding: 0 14px;
  border: 1px solid rgb(255 255 255 / 22%);
  border-radius: 999px;
  background: rgb(255 255 255 / 6%);
  font-size: 14px;
  font-weight: 600;
  white-space: nowrap;
  transition: background-color 0.2s ease, border-color 0.2s ease;
}

.topbar__link:hover {
  border-color: rgb(255 255 255 / 40%);
  background: rgb(255 255 255 / 12%);
}

@media (max-width: 359px) {
  .brand__domain {
    display: none;
  }
}

/* ---------- 首屏：夜场转播舞台 ---------- */

.hero {
  --focus: #ffd36b;

  position: relative;
  isolation: isolate;
  overflow: hidden;
  padding-top: calc(var(--topbar-h) + env(safe-area-inset-top));
  padding-bottom: var(--cut);
  color: var(--on-navy);
  background:
    radial-gradient(70% 55% at 50% 22%, rgb(55 164 252 / 30%), transparent 70%),
    radial-gradient(50% 40% at 0% 100%, rgb(0 180 255 / 14%), transparent 70%),
    linear-gradient(165deg, #0b1f42 0%, var(--navy-900) 50%, var(--navy-950) 100%);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - var(--cut)), 0 100%);
}

/* 斜向速度光带，呼应 HQ 标志 */
.hero::before {
  content: "";
  position: absolute;
  inset: -20% -40%;
  z-index: -1;
  background:
    linear-gradient(162deg,
      transparent 0 34%,
      rgb(0 180 255 / 16%) 34% 34.6%,
      transparent 34.6% 37%,
      rgb(55 164 252 / 10%) 37% 39.5%,
      transparent 39.5% 62%,
      rgb(0 180 255 / 9%) 62% 62.4%,
      transparent 62.4%);
  pointer-events: none;
}

/* 底部细噪纹：横向扫描线，营造转播画面质感 */
.hero::after {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -1;
  background: repeating-linear-gradient(0deg, rgb(255 255 255 / 2.2%) 0 1px, transparent 1px 4px);
  mask-image: linear-gradient(180deg, transparent 30%, #000 100%);
  -webkit-mask-image: linear-gradient(180deg, transparent 30%, #000 100%);
  pointer-events: none;
}

.hero__grid {
  display: grid;
  gap: 8px;
  padding-top: 4px;
  padding-bottom: 28px;
}

.hero__copy {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
}

.hero__stage {
  order: -1;
}

.eyebrow {
  padding: 5px 14px;
  border: 1px solid rgb(120 190 255 / 38%);
  border-radius: 999px;
  background: rgb(55 164 252 / 12%);
  color: #d6ebff;
  font-size: 12.5px;
  font-weight: 700;
  letter-spacing: 0.12em;
  line-height: 1.4;
}

.hero__title {
  margin-top: 10px;
  font-size: clamp(46px, 13vw, 84px);
  font-weight: 900;
  line-height: 1.05;
  letter-spacing: 0.04em;
  transform: skewX(-8deg);
}

.hero__brand {
  background: linear-gradient(100deg, #8fd6ff 0%, var(--brand) 55%, var(--brand-strong) 100%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.hero__slogan {
  margin-top: 10px;
  font-size: clamp(20px, 5.6vw, 30px);
  font-weight: 800;
  letter-spacing: 0.06em;
  line-height: 1.35;
}

.hero__slogan span {
  padding-bottom: 2px;
  background: linear-gradient(90deg, var(--cyan), var(--brand-strong)) left bottom / 100% 3px no-repeat;
}

.hero__lead {
  max-width: 30em;
  margin-top: 14px;
  color: var(--on-navy-soft);
  font-size: 15px;
  line-height: 1.7;
}

/* 备用线路入口：/lines 由 tiyu-landing 服务渲染 */
.cta__lines {
  margin-top: 14px;
  color: var(--on-navy-mute);
  font-size: 13px;
  line-height: 1.5;
}

.cta__lines a {
  color: var(--on-navy-soft);
  text-decoration: underline;
  text-decoration-color: rgb(214 228 250 / 40%);
  text-underline-offset: 3px;
}

.cta__lines a:hover {
  color: var(--on-navy);
  text-decoration-color: currentColor;
}

/* ---------- 按钮 ---------- */

.cta {
  display: grid;
  gap: 12px;
  width: 100%;
  max-width: 420px;
  margin-top: 24px;
}

.cta__download {
  display: grid;
  gap: 8px;
}

.cta__note {
  color: var(--on-navy-mute);
  font-size: 12.5px;
  line-height: 1.4;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  min-height: 54px;
  padding: 0 22px;
  border-radius: 14px;
  font-size: 17px;
  font-weight: 700;
  letter-spacing: 0.02em;
  line-height: 1.2;
  white-space: nowrap;
  transition: transform 0.15s ease, box-shadow 0.2s ease, background-color 0.2s ease;
}

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

.btn--primary {
  color: #ffffff;
  background: linear-gradient(135deg, var(--brand-ink) 0%, var(--brand-deep) 100%);
  box-shadow: 0 10px 26px rgb(11 95 214 / 45%), inset 0 1px 0 rgb(255 255 255 / 22%);
}

.btn--primary:hover {
  background: linear-gradient(135deg, #0f66de 0%, #0a58c8 100%);
  box-shadow: 0 14px 32px rgb(11 95 214 / 55%), inset 0 1px 0 rgb(255 255 255 / 22%);
}

.btn--light {
  color: #0b2348;
  background: #ffffff;
  box-shadow: 0 10px 24px rgb(0 0 0 / 22%);
}

.btn--light:hover {
  background: #eef6ff;
}

.btn__android {
  color: #1a9f53;
}

.btn__arrow {
  margin-left: -2px;
  transition: transform 0.2s ease;
}

.btn--primary:hover .btn__arrow {
  transform: translateX(3px);
}

/* ---------- 舞台：中圈 + App 图标 + 浮动标签 ---------- */

/* 手机端舞台收小、不显示浮动标签（内容在功能区都有），保证首屏露出两个按钮 */
.stage {
  position: relative;
  width: min(100%, 220px);
  aspect-ratio: 1 / 0.86;
  margin-inline: auto;
}

/* 中圈 + 转播扫光 */
.stage__ring {
  position: absolute;
  top: 50%;
  left: 50%;
  width: 82%;
  aspect-ratio: 1;
  border: 2px solid rgb(255 255 255 / 11%);
  border-radius: 50%;
  transform: translate(-50%, -50%);
}

.stage__ring::before {
  content: "";
  position: absolute;
  inset: -2px;
  border-radius: 50%;
  background: conic-gradient(from 0deg, transparent 0 290deg, rgb(55 164 252 / 32%) 360deg);
  mask-image: radial-gradient(circle, transparent 0 62%, #000 63%);
  -webkit-mask-image: radial-gradient(circle, transparent 0 62%, #000 63%);
  animation: sweep 6s linear infinite;
}

.stage__ring::after {
  content: "";
  position: absolute;
  inset: 22%;
  border: 1px dashed rgb(255 255 255 / 10%);
  border-radius: 50%;
}

.stage__icon {
  position: absolute;
  top: 50%;
  left: 50%;
  width: 46%;
  height: auto;
  aspect-ratio: 1;
  border-radius: 24%;
  background: #ffffff;
  box-shadow:
    0 0 0 6px rgb(255 255 255 / 7%),
    0 22px 50px rgb(2 30 90 / 60%),
    0 0 80px rgb(55 164 252 / 35%);
  transform: translate(-50%, -50%) rotate(-4deg);
}

.stage__chips {
  display: none;
  position: absolute;
  inset: 0;
}

.chip {
  position: absolute;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 11px 6px 9px;
  border: 1px solid rgb(120 190 255 / 30%);
  border-radius: 999px;
  background: rgb(10 28 58 / 78%);
  color: #e6f1ff;
  font-size: 12.5px;
  font-weight: 600;
  line-height: 1.3;
  white-space: nowrap;
  box-shadow: 0 8px 20px rgb(0 0 0 / 28%);
  -webkit-backdrop-filter: blur(8px);
  backdrop-filter: blur(8px);
  animation: float 5s ease-in-out infinite;
}

.chip .icon {
  color: var(--cyan);
}

.chip--score {
  top: 10%;
  left: 0;
}

.chip--chat {
  top: 46%;
  right: 0;
  animation-delay: -1.6s;
}

.chip--diamond {
  bottom: 6%;
  left: 6%;
  animation-delay: -3.2s;
}

.chip--diamond .icon {
  color: #7cc4ff;
}

/* ---------- 赛事类型条 ---------- */

.rail {
  position: relative;
  border-top: 1px solid rgb(255 255 255 / 8%);
  background: rgb(5 12 25 / 45%);
}

/* 深色模式下首屏与页面底色接近，沿斜切边描一条细光边（该区域与 .hero 的 clip-path 斜边重合） */
@media (prefers-color-scheme: dark) {
  .rail::after {
    content: "";
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    height: var(--cut);
    background: linear-gradient(to bottom right, transparent calc(50% - 2.5px), rgb(120 190 255 / 34%) calc(50% - 1.5px), rgb(120 190 255 / 34%) calc(50% - 0.5px), transparent 50%);
    pointer-events: none;
  }
}

.rail__list {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 8px;
  padding-top: 16px;
  padding-bottom: 14px;
}

.rail__list li {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
  color: var(--on-navy-soft);
  font-size: 13px;
  font-weight: 600;
  white-space: nowrap;
}

.rail__list .icon {
  color: var(--brand);
}

/* ---------- 功能区 ---------- */

.features {
  padding-block: 44px 56px;
}

.section-head {
  max-width: 640px;
  margin-bottom: 28px;
}

.kicker {
  color: var(--label);
  font-family: var(--font-latin);
  font-size: 12px;
  font-weight: 800;
  letter-spacing: 0.16em;
}

.section-head h2 {
  margin-top: 8px;
  font-size: clamp(26px, 7.2vw, 40px);
  font-weight: 900;
  line-height: 1.25;
  letter-spacing: 0.02em;
}

.section-head__desc {
  margin-top: 10px;
  color: var(--muted);
  font-size: 15px;
}

.feature-list {
  display: grid;
  gap: 12px;
}

.feature {
  position: relative;
  display: grid;
  grid-template-columns: 48px minmax(0, 1fr);
  column-gap: 14px;
  align-content: start;
  padding: 18px 18px 20px;
  border: 1px solid transparent;
  border-radius: 18px;
  background:
    linear-gradient(118deg,
      transparent 0 70%,
      rgb(55 164 252 / 9%) 70% 73%,
      transparent 73% 76%,
      rgb(0 180 255 / 7%) 76% 77.5%,
      transparent 77.5%),
    var(--surface);
  box-shadow: var(--card-shadow);
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.feature__icon {
  grid-row: 1 / span 3;
  display: grid;
  place-items: center;
  width: 48px;
  height: 48px;
  border-radius: 14px;
  background: linear-gradient(135deg, var(--brand) 0%, var(--brand-deep) 100%);
  color: #ffffff;
  box-shadow: 0 8px 18px rgb(21 112 232 / 28%);
  transform: skewX(-6deg);
}

.feature__icon .icon {
  transform: skewX(6deg);
}

.feature__tag {
  color: var(--label);
  font-family: var(--font-latin);
  font-size: 11.5px;
  font-weight: 800;
  letter-spacing: 0.14em;
  line-height: 1.6;
}

.feature__title {
  margin-top: 2px;
  font-size: 18px;
  font-weight: 800;
  line-height: 1.4;
}

.feature__desc {
  margin-top: 6px;
  color: var(--muted);
  font-size: 14.5px;
  line-height: 1.7;
}

@media (prefers-color-scheme: dark) {
  .feature {
    border-color: var(--line);
  }

  .get__card {
    border: 1px solid rgb(120 190 255 / 18%);
  }
}

@media (hover: hover) {
  .feature:hover {
    transform: translateY(-3px);
    box-shadow: 0 2px 4px rgb(16 40 80 / 6%), 0 18px 40px rgb(16 40 80 / 12%);
  }
}

/* ---------- 下载卡片 ---------- */

.get {
  padding-bottom: 56px;
}

.get__card {
  --focus: #ffd36b;

  position: relative;
  isolation: isolate;
  overflow: hidden;
  display: grid;
  justify-items: center;
  gap: 18px;
  padding: 32px 20px 28px;
  border-radius: 24px;
  color: var(--on-navy);
  text-align: center;
  background:
    radial-gradient(60% 80% at 100% 0%, rgb(55 164 252 / 30%), transparent 70%),
    linear-gradient(150deg, var(--navy-800) 0%, var(--navy-900) 60%, var(--navy-950) 100%);
  box-shadow: 0 20px 50px rgb(8 20 40 / 22%);
}

.get__card::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -1;
  background:
    linear-gradient(160deg,
      transparent 0 58%,
      rgb(0 180 255 / 14%) 58% 58.8%,
      transparent 58.8% 62%,
      rgb(55 164 252 / 9%) 62% 66%,
      transparent 66%);
  pointer-events: none;
}

.get__icon {
  width: 80px;
  height: 80px;
  border-radius: 22px;
  background: #ffffff;
  box-shadow: 0 0 0 5px rgb(255 255 255 / 8%), 0 14px 30px rgb(0 0 0 / 35%);
}

.get__title {
  font-size: clamp(22px, 6vw, 30px);
  font-weight: 900;
  line-height: 1.3;
  letter-spacing: 0.02em;
}

.get__desc {
  max-width: 32em;
  margin-top: 8px;
  color: var(--on-navy-soft);
  font-size: 14.5px;
  line-height: 1.7;
}

.get__actions {
  display: grid;
  gap: 12px;
  width: 100%;
  max-width: 420px;
}

/* ---------- 页脚 ---------- */

.footer {
  padding: 28px 0 calc(32px + env(safe-area-inset-bottom));
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 13px;
  line-height: 1.75;
}

.footer__inner {
  display: grid;
  gap: 10px;
}

.footer__brand {
  display: flex;
  align-items: center;
  gap: 8px;
  color: var(--text);
  font-size: 15px;
  font-weight: 800;
}

.footer__domain {
  color: var(--muted);
  font-family: var(--font-latin);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.14em;
}

.footer__disclaimer {
  max-width: 56em;
}

/* ---------- 平板 ---------- */

@media (min-width: 600px) {
  .feature-list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 16px;
  }

  .feature {
    grid-template-columns: minmax(0, 1fr);
    padding: 24px 22px 26px;
  }

  .feature__icon {
    grid-row: auto;
    margin-bottom: 18px;
  }

  .rail__list {
    display: flex;
    justify-content: center;
    gap: 40px;
  }

  .rail__list li {
    flex-direction: row;
    gap: 8px;
    font-size: 14px;
  }
}

/* ---------- 桌面 ---------- */

@media (min-width: 960px) {
  .hero__grid {
    grid-template-columns: minmax(0, 1.08fr) minmax(0, 0.92fr);
    align-items: center;
    gap: 32px;
    min-height: clamp(540px, calc(86vh - var(--topbar-h)), 700px);
    padding-top: 24px;
    padding-bottom: 48px;
  }

  .hero__copy {
    align-items: flex-start;
    text-align: left;
  }

  .hero__stage {
    order: 0;
  }

  .hero__title {
    margin-top: 16px;
  }

  .stage {
    width: min(100%, 460px);
    aspect-ratio: 1;
  }

  /* 中线：贯穿首屏的球场中线（只在宽屏显示，避免手机上穿过标题与导语） */
  .stage::before {
    content: "";
    position: absolute;
    top: -60vh;
    bottom: -60vh;
    left: 50%;
    width: 2px;
    margin-left: -1px;
    background: linear-gradient(180deg, transparent, rgb(255 255 255 / 9%) 35%, rgb(255 255 255 / 9%) 65%, transparent);
    pointer-events: none;
  }

  .stage__chips {
    display: block;
  }

  .stage__icon {
    width: 42%;
  }

  .chip {
    padding: 8px 14px 8px 11px;
    font-size: 14px;
  }

  .chip--score {
    top: 14%;
    left: 2%;
  }

  .chip--chat {
    top: 48%;
    right: -2%;
  }

  .chip--diamond {
    bottom: 12%;
    left: 8%;
  }

  .hero__lead {
    font-size: 17px;
  }

  .cta {
    display: flex;
    flex-wrap: wrap;
    align-items: flex-start;
    gap: 14px;
    max-width: none;
    margin-top: 32px;
  }

  .cta .btn {
    min-width: 196px;
  }

  .cta__note {
    padding-left: 4px;
  }

  .rail__list {
    justify-content: flex-start;
    gap: 48px;
    padding-top: 18px;
    padding-bottom: 18px;
  }

  .features {
    padding-block: 72px 88px;
  }

  .section-head {
    margin-bottom: 36px;
  }

  .feature-list {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 20px;
  }

  .get {
    padding-bottom: 88px;
  }

  .get__card {
    grid-template-columns: auto minmax(0, 1fr) auto;
    align-items: center;
    justify-items: start;
    gap: 28px;
    padding: 36px 40px;
    text-align: left;
  }

  .get__icon {
    width: 88px;
    height: 88px;
    border-radius: 24px;
  }

  .get__actions {
    width: 260px;
  }

  .get__actions .cta__note {
    text-align: center;
  }

  .footer__inner {
    grid-template-columns: auto minmax(0, 1fr) auto;
    align-items: start;
    gap: 32px;
  }
}

/* ---------- 动效 ---------- */

@keyframes sweep {
  to {
    transform: rotate(360deg);
  }
}

@keyframes float {
  0%,
  100% {
    transform: translateY(0);
  }

  50% {
    transform: translateY(-5px);
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation: none !important;
    transition: none !important;
  }
}

/* 强制高对比模式下保留按钮边界 */
@media (forced-colors: active) {
  .btn,
  .topbar__link,
  .chip {
    border: 1px solid ButtonText;
  }
}