/* =========================================================
   绿色弹跳官网样式
   视觉：夜场球场深绿 + 网球黄绿 + 粉笔白线；浅色段落用米白「纸面」穿插
   字体：复用小程序的阿里妈妈数黑体（标题）与 DIN（数字），均已按页面用字子集化
   ========================================================= */

/* ---------- 字体 ---------- */
@font-face {
  font-family: "GB ShuHei";
  src: url("../fonts/shuheiti.woff2") format("woff2");
  font-weight: 700;
  font-display: swap;
}
@font-face {
  font-family: "GB DIN";
  src: url("../fonts/din-black.woff2") format("woff2");
  font-weight: 900;
  font-display: swap;
}
@font-face {
  font-family: "GB DIN";
  src: url("../fonts/din-medium.woff2") format("woff2");
  font-weight: 500;
  font-display: swap;
}

/* ---------- 设计变量 ---------- */
:root {
  /* 夜场球场：由深到浅三档 */
  --court: #07150f;
  --court-2: #0c2018;
  --court-3: #132c22;
  /* 粉笔白：球场线与深色底上的文字 */
  --chalk: #eef3ea;
  --chalk-dim: rgba(238, 243, 234, .62);
  --line: rgba(238, 243, 234, .12);
  /* 网球黄绿：全站唯一强调色 */
  --ball: #d8f24a;
  --ball-hot: #e9ff6e;
  /* 小程序主色，用在少量辅助元素 */
  --brand: #30ac91;
  /* 纸面：浅色段落 */
  --paper: #f3f1ea;
  --paper-2: #fbfaf6;
  --ink: #0b1a14;
  --ink-dim: #56665e;
  --rule: rgba(11, 26, 20, .12);

  --f-display: "GB ShuHei", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  --f-num: "GB DIN", "DIN Alternate", "Helvetica Neue", Arial, sans-serif;
  --f-body: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", sans-serif;

  --ease: cubic-bezier(.22, 1, .36, 1);
  --gutter: clamp(16px, 4vw, 56px);
  --radius: 28px;
}

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

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

body {
  margin: 0;
  background: var(--court);
  color: var(--chalk);
  font-family: var(--f-body);
  font-size: 16px;
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

/* 全屏颗粒噪点，给纯色背景一点胶片质感 */
body::after {
  content: "";
  position: fixed;
  inset: 0;
  z-index: 90;
  pointer-events: none;
  opacity: .07;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='160' height='160'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.9' numOctaves='2' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
  mix-blend-mode: overlay;
}

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

a { color: inherit; text-decoration: none; }

main { overflow-x: clip; }

h1, h2, h3, p, ol, ul, dl, dd { margin: 0; }
ol, ul { padding: 0; list-style: none; }

h1, h2, h3 {
  font-family: var(--f-display);
  font-weight: 700;
  letter-spacing: .01em;
}

h2 {
  font-size: clamp(36px, 5.4vw, 80px);
  line-height: 1.1;
}

h3 {
  font-size: clamp(22px, 2vw, 30px);
  line-height: 1.3;
}

strong { font-weight: 700; }

::selection { background: var(--ball); color: var(--ink); }

/* SVG 图形库：不能 display:none，否则渐变引用失效 */
.sprite { position: absolute; width: 0; height: 0; overflow: hidden; }

.num {
  font-family: var(--f-num);
  font-variant-numeric: tabular-nums;
}

.container {
  width: 100%;
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 var(--gutter);
}

/* 有 JS 时先隐藏入场元素，由 GSAP 负责显示；爬虫读取的 HTML 文本不受影响 */
.js [data-reveal],
.js [data-hero-fade],
.js .hero__title { visibility: hidden; }

/* ---------- Lenis 平滑滚动所需样式（同 lenis.css） ---------- */
html.lenis, html.lenis body { height: auto; }
.lenis.lenis-smooth { scroll-behavior: auto !important; }
.lenis.lenis-smooth [data-lenis-prevent] { overscroll-behavior: contain; }
.lenis.lenis-stopped { overflow: hidden; }
.lenis.lenis-smooth iframe { pointer-events: none; }

/* ---------- 通用组件 ---------- */
.section {
  position: relative;
  padding: clamp(96px, 13vw, 176px) 0;
}

.section--paper { background: var(--paper); color: var(--ink); }
.section--court { background: var(--court); color: var(--chalk); }

.section__head { max-width: 760px; margin-bottom: clamp(48px, 6vw, 88px); }
.section__head h2 { margin-top: 20px; }

.section__desc {
  margin-top: 24px;
  max-width: 560px;
  font-size: clamp(16px, 1.25vw, 18px);
  color: var(--ink-dim);
}
.section--court .section__desc { color: var(--chalk-dim); }
.section--court .section__desc strong { color: var(--chalk); }

/* 段落编号标签：「01 关于」 */
.label {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  font-size: 14px;
  letter-spacing: .24em;
  color: var(--ink-dim);
}
.label .num {
  display: inline-grid;
  place-items: center;
  width: 34px;
  height: 34px;
  border-radius: 50%;
  background: var(--ink);
  color: var(--ball);
  font-size: 13px;
  font-weight: 500;
  letter-spacing: 0;
}
.label--dark { color: var(--chalk-dim); }
.label--dark .num { background: var(--ball); color: var(--ink); }

/* 高亮文字 */
.hl { color: var(--ball); }

/* 按钮 */
.btn {
  position: relative;
  display: inline-flex;
  align-items: center;
  gap: 10px;
  height: 58px;
  padding: 0 28px;
  border-radius: 999px;
  font-size: 16px;
  font-weight: 600;
  white-space: nowrap;
  transition: background-color .4s var(--ease), color .4s var(--ease), border-color .4s var(--ease);
}
.btn__icon { width: 20px; height: 20px; transition: transform .4s var(--ease); }
.btn:hover .btn__icon { transform: translateX(4px); }

.btn--ball { background: var(--ball); color: var(--ink); }
.btn--ball:hover { background: var(--ball-hot); }

.btn--ghost { border: 1px solid rgba(238, 243, 234, .28); color: var(--chalk); }
.btn--ghost:hover { border-color: var(--chalk); background: rgba(238, 243, 234, .06); }

/* 带箭头的文字链接 */
.link-arrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  margin-top: 40px;
  padding-bottom: 6px;
  border-bottom: 1px solid currentColor;
  font-weight: 600;
  color: var(--ball);
}
.link-arrow svg { width: 20px; height: 20px; transition: transform .4s var(--ease); }
.link-arrow:hover svg { transform: translateX(6px); }

/* 手机样机：钛金属渐变中框 + 黑色屏幕边 + 灵动岛 + 侧键 + 玻璃反光
   屏幕比例与截图一致（750 × 1624），所有尺寸按机身宽度 --w 等比计算，改 --w 即可整体缩放 */
.phone {
  --w: 300px;
  position: relative;
  width: var(--w);
  padding: calc(var(--w) * .03);
  border: calc(var(--w) * .014) solid transparent;
  border-radius: calc(var(--w) * .18);
  background:
    linear-gradient(#050606, #050606) padding-box,
    linear-gradient(140deg, #e3e8e5, #6c736f 22%, #262b28 48%, #7d8580 74%, #e6ebe8) border-box;
  box-shadow:
    0 60px 100px -40px rgba(0, 0, 0, .55),
    0 24px 44px -20px rgba(0, 0, 0, .45);
}
/* 侧键：左侧静音键 + 两个音量键（box-shadow 复制出来），右侧电源键 */
.phone::before,
.phone::after {
  content: "";
  position: absolute;
  width: calc(var(--w) * .014);
  height: calc(var(--w) * .1);
  border-radius: 2px;
  background: #8c938f;
}
.phone::before {
  left: calc(var(--w) * -.028);
  top: calc(var(--w) * .38);
  box-shadow: 0 calc(var(--w) * .17) 0 #8c938f, 0 calc(var(--w) * .31) 0 #8c938f;
}
.phone::after {
  right: calc(var(--w) * -.028);
  top: calc(var(--w) * .56);
  height: calc(var(--w) * .2);
}
.phone__screen {
  position: relative;
  overflow: hidden;
  aspect-ratio: 750 / 1624;
  border-radius: calc(var(--w) * .15);
  background: #fff;
  isolation: isolate;
}
.phone__screen img { display: block; width: 100%; height: auto; }
/* 灵动岛：落在截图状态栏的时间和信号图标之间 */
.phone__screen::before {
  content: "";
  position: absolute;
  z-index: 3;
  top: calc(var(--w) * .022);
  left: 50%;
  width: 32%;
  height: calc(var(--w) * .088);
  border-radius: 999px;
  background: #000;
  transform: translateX(-50%);
}
/* 玻璃反光 */
.phone__screen::after {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 4;
  pointer-events: none;
  background: linear-gradient(118deg, rgba(255, 255, 255, .2), rgba(255, 255, 255, .03) 26%, transparent 38%);
}
/* 鼠标聚光：JS 写入 --mx/--my，卡片表面跟随出现一圈柔光 */
.spot { position: relative; isolation: isolate; overflow: hidden; }
.spot::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -1;
  opacity: 0;
  background: radial-gradient(420px circle at var(--mx, 50%) var(--my, 50%), rgba(216, 242, 74, .22), transparent 60%);
  transition: opacity .5s var(--ease);
}
.spot:hover::before { opacity: 1; }

/* =========================================================
   导航
   ========================================================= */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 80;
  display: flex;
  align-items: center;
  gap: 32px;
  height: 76px;
  padding: 0 var(--gutter);
  color: var(--chalk);
  transition: transform .6s var(--ease), background-color .5s var(--ease), border-color .5s var(--ease);
  border-bottom: 1px solid transparent;
}
/* 滚动后加深色毛玻璃，保证在浅色段落上也看得清 */
.nav.is-scrolled {
  background: rgba(7, 21, 15, .92);
  -webkit-backdrop-filter: blur(16px) saturate(140%);
  backdrop-filter: blur(16px) saturate(140%);
  border-color: var(--line);
}
/* 向下滚动时收起 */
.nav.is-hidden { transform: translateY(-100%); }

.nav__brand { display: flex; align-items: center; gap: 12px; }
.nav__logo { width: 36px; height: 36px; border-radius: 50%; }
.nav__name { font-family: var(--f-display); font-size: 20px; letter-spacing: .06em; }

.nav__links { display: flex; gap: 32px; margin-left: auto; font-size: 15px; }
.nav__links a { position: relative; color: var(--chalk-dim); transition: color .3s; }
.nav__links a::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: -6px;
  height: 2px;
  background: var(--ball);
  transform: scaleX(0);
  transform-origin: right;
  transition: transform .5s var(--ease);
}
.nav__links a:hover { color: var(--chalk); }
.nav__links a:hover::after { transform: scaleX(1); transform-origin: left; }

.nav__cta {
  height: 40px;
  padding: 0 20px;
  border-radius: 999px;
  background: var(--ball);
  color: var(--ink);
  font-size: 14px;
  font-weight: 600;
  line-height: 40px;
  transition: background-color .3s;
}
.nav__cta:hover { background: var(--ball-hot); }

.nav__toggle {
  display: none;
  position: relative;
  width: 44px;
  height: 44px;
  margin-left: auto;
  padding: 0;
  border: 0;
  border-radius: 50%;
  background: rgba(238, 243, 234, .08);
  cursor: pointer;
}
.nav__toggle span {
  position: absolute;
  left: 13px;
  right: 13px;
  height: 2px;
  background: var(--chalk);
  transition: transform .5s var(--ease);
}
.nav__toggle span:first-child { top: 17px; }
.nav__toggle span:last-child { top: 25px; }
.menu-open .nav__toggle span:first-child { transform: translateY(4px) rotate(45deg); }
.menu-open .nav__toggle span:last-child { transform: translateY(-4px) rotate(-45deg); }

/* 移动端全屏菜单 */
.drawer {
  position: fixed;
  inset: 0;
  z-index: 70;
  display: flex;
  align-items: flex-end;
  padding: 120px var(--gutter) 64px;
  background: var(--court);
  clip-path: circle(0 at calc(100% - 38px) 38px);
  transition: clip-path .8s var(--ease);
}
.menu-open .drawer { clip-path: circle(150% at calc(100% - 38px) 38px); }
.drawer__links { display: grid; gap: 8px; }
.drawer__links a { font-family: var(--f-display); font-size: 40px; line-height: 1.4; }

/* =========================================================
   首屏
   ========================================================= */
.hero {
  position: relative;
  display: flex;
  align-items: center;
  min-height: 100vh;
  min-height: 100svh;
  padding: 140px 0 120px;
  overflow: hidden;
  background: var(--court);
}

/* 球场顶灯：右上角一束偏黄绿的光，向四周压暗 */
.hero__glow {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(60% 70% at 78% 18%, rgba(216, 242, 74, .16), transparent 60%),
    radial-gradient(50% 60% at 70% 70%, rgba(48, 172, 145, .18), transparent 70%),
    radial-gradient(120% 90% at 50% 120%, #000 0%, transparent 60%);
}

/* 透视球场：外层给透视，中间层沿 X 轴倒下成地面，SVG 在地面内旋转（由 GSAP 控制） */
.hero__court {
  position: absolute;
  top: 50%;
  right: -10vw;
  width: min(70vw, 1100px);
  aspect-ratio: 1;
  perspective: 1200px;
  perspective-origin: 50% 0;
  transform: translateY(-40%);
  pointer-events: none;
  -webkit-mask-image: linear-gradient(180deg, transparent 8%, #000 38%);
  mask-image: linear-gradient(180deg, transparent 8%, #000 38%);
}
.hero__court-plane {
  position: absolute;
  inset: 0;
  transform: rotateX(62deg);
}
.court {
  position: absolute;
  top: 50%;
  left: 50%;
  width: 40%;
  height: auto;
  transform: translate(-50%, -50%) rotate(-38deg);
  overflow: visible;
}
.court__line {
  stroke: rgba(238, 243, 234, .6);
  stroke-width: 8;
}
.court__net {
  stroke: var(--ball);
  stroke-width: 9;
  stroke-linecap: round;
  filter: drop-shadow(0 0 18px rgba(216, 242, 74, .8));
}

.hero__inner {
  position: relative;
  z-index: 2;
  width: 100%;
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 var(--gutter);
}

.hero__eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 8px 16px;
  border: 1px solid var(--line);
  border-radius: 999px;
  font-size: 14px;
  color: var(--chalk-dim);
  background: rgba(7, 21, 15, .4);
}
.hero__eyebrow .dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--ball);
  box-shadow: 0 0 0 4px rgba(216, 242, 74, .2);
  animation: pulse 2.4s ease-in-out infinite;
}
@keyframes pulse {
  50% { box-shadow: 0 0 0 8px rgba(216, 242, 74, 0); }
}

.hero__title {
  margin-top: 28px;
  font-size: clamp(52px, 8.4vw, 136px);
  line-height: 1.06;
  letter-spacing: .02em;
}
/* 每一行是一个遮罩，字从下方升起 */
.hero__line { display: block; overflow: hidden; padding-bottom: .08em; }
.hero__line-inner { display: inline-block; }

/* 句号位置的网球：从天而降，弹三下停稳 */
.hero__ball {
  position: relative;
  display: inline-block;
  width: .28em;
  height: .28em;
  margin-left: .1em;
  vertical-align: baseline;
}
.hero__ball-body {
  position: absolute;
  inset: 0;
  transform-origin: 50% 100%;
  filter: drop-shadow(0 0 24px rgba(216, 242, 74, .45));
}
.hero__ball-body svg { width: 100%; height: 100%; }
/* 落地时扩散的光圈 */
.hero__ball-shadow {
  position: absolute;
  left: -40%;
  right: -40%;
  bottom: -.06em;
  height: .12em;
  border: 2px solid var(--ball);
  border-radius: 50%;
  opacity: 0;
}

.hero__lead {
  max-width: 560px;
  margin-top: 32px;
  font-size: clamp(16px, 1.3vw, 19px);
  color: var(--chalk-dim);
}
.hero__lead strong { color: var(--chalk); }

.hero__actions { display: flex; flex-wrap: wrap; gap: 14px; margin-top: 44px; }

/* 首屏手机：立在球场上，底部超出首屏、被斜向标语带压住 */
.hero__device {
  position: absolute;
  z-index: 1;
  top: 15%;
  right: 9%;
  margin: 0;
  pointer-events: none;
}
.js .hero__device { visibility: hidden; }
/* 手机背后的一团光 */
.hero__device::before {
  content: "";
  position: absolute;
  inset: 10% -40% 0;
  background: radial-gradient(closest-side, rgba(216, 242, 74, .22), transparent);
}
/* 3D 倾斜：--tx / --ty 由鼠标位置驱动，单位为度 */
.hero__device .phone {
  --w: clamp(280px, 24vw, 360px);
  transform: perspective(1800px) rotateX(calc(6deg + var(--tx, 0) * 1deg)) rotateY(calc(-16deg + var(--ty, 0) * 1deg)) rotateZ(3deg);
}

/* 滚动提示：一条细线里有个小点往下走 */
.hero__scroll {
  position: absolute;
  left: 50%;
  bottom: 32px;
  z-index: 2;
  width: 26px;
  height: 44px;
  margin-left: -13px;
  border: 1.5px solid rgba(238, 243, 234, .35);
  border-radius: 999px;
}
.hero__scroll span {
  position: absolute;
  top: 8px;
  left: 50%;
  width: 6px;
  height: 6px;
  margin-left: -3px;
  border-radius: 50%;
  background: var(--ball);
  animation: scroll-dot 2s var(--ease) infinite;
}
@keyframes scroll-dot {
  0% { transform: translateY(0); opacity: 0; }
  30% { opacity: 1; }
  100% { transform: translateY(20px); opacity: 0; }
}

/* =========================================================
   斜向标语带
   ========================================================= */
.ticker {
  position: relative;
  z-index: 5;
  margin: -28px -2vw;
  padding: 18px 0;
  overflow: hidden;
  background: var(--ball);
  color: var(--ink);
  transform: rotate(-2deg);
  box-shadow: 0 20px 50px -20px rgba(0, 0, 0, .4);
}
.ticker__track {
  display: flex;
  align-items: center;
  gap: 32px;
  width: max-content;
  font-family: var(--f-display);
  font-size: clamp(20px, 2.4vw, 34px);
  white-space: nowrap;
}
.ticker__track i {
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--ink);
}

/* =========================================================
   01 关于
   ========================================================= */
.about { padding-top: clamp(140px, 16vw, 220px); }
.about__title { margin-top: 20px; font-size: clamp(22px, 2vw, 28px); color: var(--ink-dim); }

.statement {
  max-width: 1100px;
  margin-top: 28px;
  font-family: var(--f-display);
  font-size: clamp(28px, 3.6vw, 54px);
  line-height: 1.42;
  letter-spacing: .01em;
}

.facts {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  margin-top: clamp(64px, 8vw, 120px);
  border-top: 1px solid var(--rule);
}
.facts__item { padding: 32px 24px 0 0; }
.facts__item + .facts__item { padding-left: 24px; border-left: 1px solid var(--rule); }
.facts__num {
  font-size: clamp(44px, 5vw, 76px);
  font-weight: 900;
  line-height: 1;
  letter-spacing: -.02em;
}
.facts__num .dash { font-weight: 500; margin: 0 .04em; }
.facts__num small { font-family: var(--f-body); font-size: .32em; font-weight: 600; margin-left: 4px; letter-spacing: 0; }
.facts dd { margin-top: 14px; font-size: 15px; color: var(--ink-dim); }

/* =========================================================
   02 约球
   ========================================================= */
.play { padding-top: 0; }

.play__cards { display: grid; grid-template-columns: 1fr 1fr; gap: 24px; }

.mode {
  display: flex;
  flex-direction: column;
  padding: clamp(28px, 3.4vw, 48px);
  border: 1px solid var(--rule);
  border-radius: var(--radius);
  background: var(--paper-2);
  transition: transform .6s var(--ease), box-shadow .6s var(--ease);
}
.mode:hover { transform: translateY(-6px); box-shadow: 0 40px 80px -40px rgba(11, 26, 20, .35); }

.mode h3 { font-size: clamp(32px, 3.4vw, 48px); }
.mode__slogan { margin-top: 6px; font-size: 17px; color: var(--ink-dim); }

.mode__list { display: grid; gap: 12px; margin-top: 32px; }
.mode__list li { position: relative; padding-left: 26px; }
.mode__list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: .62em;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--ball);
  box-shadow: inset 0 0 0 1.5px var(--ink);
}

.mode__art { width: 100%; height: auto; margin-top: auto; padding-top: 40px; overflow: visible; }
.mode__arc { stroke: currentColor; stroke-width: 1.5; stroke-dasharray: 4 8; opacity: .5; }
.mode__ground { stroke: currentColor; stroke-width: 1.5; opacity: .25; }

/* 专业约球用深色反差 */
.mode--pro { background: var(--court); border-color: var(--court); color: var(--chalk); }
.mode--pro .mode__slogan { color: var(--chalk-dim); }
.mode--pro .mode__list li::before { box-shadow: none; }

/* 约球流程条 */
.flow {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 12px;
  margin-top: 40px;
}
.flow li {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 10px 20px 10px 10px;
  border: 1px solid var(--rule);
  border-radius: 999px;
  background: var(--paper-2);
  font-weight: 600;
}
.flow li + li::before {
  content: "";
  width: 24px;
  height: 1px;
  margin: 0 4px 0 -32px;
  background: var(--ink);
  opacity: .3;
}
.flow li + li { margin-left: 20px; }
.flow .num {
  display: inline-grid;
  place-items: center;
  width: 30px;
  height: 30px;
  border-radius: 50%;
  background: var(--ink);
  color: var(--ball);
  font-size: 14px;
  font-weight: 900;
}

/* =========================================================
   03 GTR 等级
   ========================================================= */
.gtr { overflow: hidden; }
.gtr::before {
  content: "";
  position: absolute;
  top: -20%;
  left: -10%;
  width: 70%;
  height: 80%;
  background: radial-gradient(closest-side, rgba(48, 172, 145, .16), transparent);
  pointer-events: none;
}

.gtr__intro {
  position: relative;
  display: grid;
  grid-template-columns: 1.5fr 1fr;
  gap: 48px;
  align-items: end;
}
.gtr__intro h2 { margin-top: 20px; }

/* 等级标尺 */
.meter {
  position: relative;
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 0 48px;
  align-items: end;
  margin-top: clamp(64px, 9vw, 128px);
}
.meter__ruler,
.meter__scale { grid-column: 1 / -1; }
.meter__readout { display: flex; align-items: flex-start; gap: 16px; }
.meter__tag {
  margin-top: 1.2em;
  padding: 4px 12px;
  border-radius: 8px;
  background: var(--ball);
  color: var(--ink);
  font-family: var(--f-num);
  font-size: 16px;
  font-weight: 900;
  letter-spacing: .1em;
}
.meter__value {
  font-size: clamp(96px, 19vw, 280px);
  font-weight: 900;
  line-height: .9;
  letter-spacing: -.03em;
}
.meter__desc {
  justify-self: end;
  max-width: 360px;
  min-height: 3.5em;
  padding-bottom: 12px;
  border-left: 2px solid var(--ball);
  padding-left: 20px;
  font-size: clamp(16px, 1.3vw, 19px);
  color: var(--chalk-dim);
}

.meter__ruler { position: relative; height: 72px; margin-top: 40px; }
.meter__ticks { position: absolute; inset: 0; display: flex; justify-content: space-between; align-items: flex-end; }
.meter__ticks i { width: 1px; height: 18px; background: rgba(238, 243, 234, .25); }
.meter__ticks i.major { height: 40px; background: rgba(238, 243, 234, .6); }
.meter__fill {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--brand), var(--ball));
  transform: scaleX(0);
  transform-origin: left;
}
.meter__thumb {
  position: absolute;
  left: 0;
  bottom: -14px;
  width: 30px;
  height: 30px;
  margin-left: -15px;
  filter: drop-shadow(0 0 16px rgba(216, 242, 74, .7));
}
.meter__thumb svg { width: 100%; height: 100%; }
.meter__scale {
  display: flex;
  justify-content: space-between;
  margin-top: 24px;
  font-size: 15px;
  font-weight: 500;
  color: var(--chalk-dim);
}
.meter__scale span { width: 0; display: flex; justify-content: center; }

/* 雷达图 + 六项因素 */
.gtr__grid {
  display: grid;
  grid-template-columns: 1fr 1.1fr;
  gap: clamp(40px, 6vw, 96px);
  align-items: center;
  margin-top: clamp(96px, 12vw, 160px);
}
.radar { width: 100%; max-width: 520px; height: auto; margin: 0 auto; overflow: visible; }
.radar__grid { fill: none; stroke: var(--line); stroke-width: 1; }
.radar__shape {
  fill: rgba(216, 242, 74, .14);
  stroke: var(--ball);
  stroke-width: 2;
  stroke-linejoin: round;
}
.radar__labels text {
  fill: var(--chalk-dim);
  font-size: 13px;
  font-family: var(--f-body);
  text-anchor: middle;
  dominant-baseline: middle;
}
.radar__labels text[text-anchor="start"] { text-anchor: start; }
.radar__labels text[text-anchor="end"] { text-anchor: end; }

.gtr__factors h3 { font-size: clamp(26px, 2.6vw, 38px); }
.factors { margin-top: 32px; counter-reset: f; }
.factors li {
  position: relative;
  display: grid;
  grid-template-columns: 48px 180px 1fr;
  gap: 0 16px;
  padding: 18px 0;
  border-top: 1px solid var(--line);
  color: var(--chalk-dim);
  counter-increment: f;
}
.factors li::before {
  content: counter(f, decimal-leading-zero);
  font-family: var(--f-num);
  font-weight: 500;
  color: var(--ball);
}
.factors b { font-family: var(--f-display); font-weight: 700; font-size: 18px; color: var(--chalk); }

/* 定级赛 */
.placement {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 48px;
  align-items: center;
  margin-top: clamp(96px, 12vw, 160px);
  padding: clamp(28px, 4vw, 56px);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: linear-gradient(135deg, var(--court-3), var(--court-2));
}
.placement__text h3 { font-size: clamp(26px, 2.6vw, 38px); }
.placement__text p { max-width: 520px; margin-top: 16px; color: var(--chalk-dim); }

.placement__visual { display: grid; justify-items: center; gap: 28px; }
.placement__dots { display: grid; grid-template-columns: repeat(8, 22px); gap: 12px; }
.placement__dots i {
  width: 22px;
  height: 22px;
  border: 1.5px solid rgba(238, 243, 234, .35);
  border-radius: 50%;
}
.placement__badge {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  padding: 10px 12px 10px 22px;
  border-radius: 999px;
  background: var(--chalk);
  color: var(--ink);
  font-weight: 600;
}
/* 「定」字圆圈，和小程序里的定级标记一致 */
.placement__state {
  display: inline-grid;
  place-items: center;
  min-width: 44px;
  height: 44px;
  padding: 0 8px;
  border-radius: 999px;
  background: var(--ink);
  color: var(--ball);
  font-family: var(--f-num);
  font-size: 20px;
  font-weight: 900;
}

.gtr__note { margin-top: 48px; max-width: 640px; color: var(--chalk-dim); }

/* =========================================================
   04 赛事：桌面端整段钉住、横向滚动
   ========================================================= */
.events { padding: 0; }
.events__pin {
  display: flex;
  flex-direction: column;
  justify-content: center;
  min-height: 100vh;
  padding: 92px 0 32px;
  overflow: hidden;
}
/* 标题在左、说明在右，压低段头高度给卡片和截图留空间 */
.events__head {
  display: grid;
  grid-template-columns: 1.6fr 1fr;
  gap: 0 48px;
  align-items: end;
  margin-bottom: 40px;
}
.events__head .label { grid-column: 1 / -1; }
.events__head h2 { margin-top: 20px; font-size: clamp(34px, 4.2vw, 64px); }
.events__head .section__desc { margin-top: 0; }

.events__track {
  display: flex;
  gap: 24px;
  width: max-content;
  --stage-h: clamp(380px, 50vh, 460px);
  /* 左右留白与容器对齐，横向滚动结束时最后一张卡片贴着右边距 */
  padding: 0 max(var(--gutter), calc((100vw - 1280px) / 2 + var(--gutter)));
}

.stage {
  position: relative;
  display: flex;
  flex-direction: column;
  width: clamp(300px, 28vw, 400px);
  height: var(--stage-h);
  padding: 32px;
  border: 1px solid var(--rule);
  border-radius: var(--radius);
  background: var(--paper-2);
  transition: background-color .5s var(--ease), color .5s var(--ease);
}
.stage:hover { background: var(--ink); color: var(--chalk); }
.stage:hover p { color: var(--chalk-dim); }

.stage__num {
  font-size: clamp(44px, 6vh, 64px);
  font-weight: 900;
  line-height: 1;
  color: transparent;
  -webkit-text-stroke: 1.5px var(--ink);
  transition: -webkit-text-stroke-color .5s var(--ease);
}
.stage:hover .stage__num { -webkit-text-stroke-color: var(--ball); }
.stage__art {
  width: 100%;
  height: clamp(72px, 11vh, 120px);
  margin: clamp(12px, 2vh, 24px) 0 clamp(16px, 2.6vh, 28px);
  overflow: visible;
}
.stage__art * { fill: none; stroke: currentColor; stroke-width: 2.5; stroke-linecap: round; stroke-linejoin: round; }
.stage__art .fill-ball { fill: var(--ball); }
.stage__art .ink-on-ball { stroke: var(--ink); }
.stage__art .art-num { fill: currentColor; stroke: none; font-family: var(--f-num); font-weight: 900; font-size: 48px; text-anchor: middle; }
.stage__art .art-num--ball { fill: var(--ball); }
.stage h3 { margin-top: auto; font-size: 26px; }
.stage p { margin-top: 10px; color: var(--ink-dim); font-size: 15px; transition: color .5s var(--ease); }

.events__progress { margin-top: 32px; }
.events__progress span {
  display: block;
  height: 2px;
  background: var(--ink);
  transform: scaleX(0);
  transform-origin: left;
}
.events__progress::before {
  content: "";
  display: block;
  height: 2px;
  margin-bottom: -2px;
  background: var(--rule);
}

/* =========================================================
   05 战队与俱乐部
   ========================================================= */
.clan__grid { display: grid; grid-template-columns: 1fr 1fr; gap: 24px; }

.duo {
  padding: clamp(28px, 3.6vw, 52px);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--court-2);
}
.duo__kicker { font-size: 14px; letter-spacing: .2em; color: var(--ball); }
.duo h3 { max-width: calc(100% - clamp(80px, 10vw, 150px)); margin-top: 16px; font-size: clamp(26px, 2.6vw, 38px); }
.duo > p:not(.duo__kicker) { max-width: 30em; margin-top: 18px; color: var(--chalk-dim); }

.duo__list { display: grid; gap: 0; margin-top: 32px; }
.duo__list li { padding: 14px 0; border-top: 1px solid var(--line); }
.duo__list li::before { content: "→"; margin-right: 12px; color: var(--ball); }

.duo__art {
  position: absolute;
  top: 28px;
  right: 28px;
  width: clamp(80px, 9vw, 128px);
  height: auto;
  opacity: .9;
  transition: transform .8s var(--ease);
}
.duo__art path,
.duo__art rect { fill: none; stroke: var(--chalk-dim); stroke-width: 2; stroke-linecap: round; stroke-linejoin: round; }
.duo__art .fill-ball { fill: var(--ball); stroke: none; }
.duo:hover .duo__art { transform: rotate(-8deg) scale(1.06); }

/* =========================================================
   06 社区
   ========================================================= */
.bento {
  display: grid;
  grid-template-columns: 1.25fr 1fr;
  grid-template-rows: auto auto;
  gap: 24px;
}
.bento__item {
  padding: clamp(28px, 3.4vw, 48px);
  border: 1px solid var(--rule);
  border-radius: var(--radius);
  background: var(--paper-2);
}
.bento__item h3 { font-size: clamp(26px, 2.4vw, 34px); }
.bento__item > p { margin-top: 14px; color: var(--ink-dim); }

/* 排行榜卡片用网球黄绿铺满，作为本段视觉重心 */
.bento__item--rank { grid-row: span 2; display: flex; flex-direction: column; background: var(--ball); border-color: var(--ball); }

.bento__item--rank::before { background: radial-gradient(420px circle at var(--mx, 50%) var(--my, 50%), rgba(255, 255, 255, .5), transparent 60%); }

.boards { display: grid; margin-top: 28px; }
.boards > div { display: grid; grid-template-columns: 120px 1fr; gap: 16px; padding: 16px 0; border-top: 1px solid rgba(11, 26, 20, .18); }
.boards dt { font-family: var(--f-display); font-size: 18px; }
.boards dd { color: rgba(11, 26, 20, .7); }

.podium { display: flex; align-items: flex-end; justify-content: center; gap: 12px; margin-top: auto; padding-top: 48px; }
.podium__col { display: flex; flex-direction: column; align-items: center; gap: 12px; width: 30%; }
.podium__col i { width: 48px; height: 48px; border-radius: 50%; background: var(--ink); box-shadow: inset 0 0 0 3px var(--ball), 0 0 0 2px var(--ink); }
.podium__col span {
  display: grid;
  place-items: start center;
  padding-top: 14px;
  width: 100%;
  border-radius: 14px 14px 0 0;
  background: var(--ink);
  color: var(--ball);
  font-size: 32px;
  font-weight: 900;
}
.podium__col--1 span { height: 150px; }
.podium__col--2 span { height: 110px; }
.podium__col--3 span { height: 80px; }

.bubbles { display: grid; gap: 10px; margin-top: 28px; }
.bubbles span {
  justify-self: start;
  padding: 10px 16px;
  border-radius: 18px 18px 18px 4px;
  background: var(--paper);
  font-size: 15px;
}
.bubbles .me { justify-self: end; border-radius: 18px 18px 4px 18px; background: var(--ink); color: var(--chalk); }

/* 弹珠：小程序主色的玻璃珠 */
.marbles { display: flex; gap: 10px; margin-top: 28px; }
.marbles i {
  width: 34px;
  height: 34px;
  border-radius: 50%;
  background: radial-gradient(circle at 32% 28%, #fff 0 8%, #7fe0c8 20%, var(--brand) 55%, #13574a 100%);
  box-shadow: 0 8px 14px -6px rgba(19, 87, 74, .6);
}

/* =========================================================
   开始使用
   ========================================================= */
.start { overflow: hidden; }
.start::before {
  content: "";
  position: absolute;
  right: -10%;
  bottom: -30%;
  width: 60%;
  height: 100%;
  background: radial-gradient(closest-side, rgba(216, 242, 74, .14), transparent);
}
.start__inner {
  position: relative;
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: 64px;
  align-items: center;
}
.steps { margin-top: 48px; }
.steps li {
  display: grid;
  grid-template-columns: 64px 1fr;
  gap: 16px;
  padding: 24px 0;
  border-top: 1px solid var(--line);
}
.steps .num { font-size: 28px; font-weight: 900; line-height: 1.2; color: var(--ball); }
.steps b { display: block; font-family: var(--f-display); font-weight: 700; font-size: clamp(18px, 1.6vw, 22px); color: var(--chalk); }
.steps div { color: var(--chalk-dim); }

.start__qr { position: relative; display: grid; justify-items: center; }
.qr {
  position: relative;
  z-index: 2;
  padding: 24px 24px 20px;
  border-radius: var(--radius);
  background: var(--chalk);
  color: var(--ink);
  text-align: center;
  box-shadow: 0 50px 100px -30px rgba(0, 0, 0, .7);
}
.qr__code {
  display: grid;
  place-items: center;
  align-content: center;
  gap: 10px;
  width: 220px;
  height: 220px;
  border-radius: 18px;
  background:
    linear-gradient(var(--chalk), var(--chalk)) padding-box,
    repeating-linear-gradient(45deg, var(--ink) 0 6px, transparent 6px 12px) border-box;
  border: 2px dashed transparent;
  font-size: 14px;
  color: var(--ink-dim);
}
.qr__code img { width: 164px; height: 164px; border-radius: 50%; }
.qr__tip { margin-top: 16px; font-size: 14px; font-weight: 600; }

/* 不停弹跳的网球：上升减速、下落加速，落地压扁 */
.start__bouncer { position: absolute; top: -40px; right: 4%; width: 64px; height: 260px; }
.start__bouncer-ball {
  position: absolute;
  left: 0;
  bottom: 12px;
  width: 64px;
  height: 64px;
  transform-origin: 50% 100%;
  animation: bounce 1.4s infinite;
}
.start__bouncer-ball svg { width: 100%; height: 100%; }
.start__bouncer-shadow {
  position: absolute;
  left: 6px;
  right: 6px;
  bottom: 0;
  height: 12px;
  border-radius: 50%;
  background: rgba(216, 242, 74, .35);
  filter: blur(4px);
  animation: bounce-shadow 1.4s infinite;
}
@keyframes bounce {
  0% { translate: 0 0; scale: 1.2 .8; animation-timing-function: cubic-bezier(.33, 1, .68, 1); }
  10% { translate: 0 -30px; scale: .92 1.08; animation-timing-function: cubic-bezier(.33, 1, .68, 1); }
  50% { translate: 0 -180px; scale: 1 1; animation-timing-function: cubic-bezier(.32, 0, .67, 0); }
  90% { translate: 0 -30px; scale: .92 1.08; animation-timing-function: cubic-bezier(.32, 0, .67, 0); }
  100% { translate: 0 0; scale: 1.2 .8; }
}
@keyframes bounce-shadow {
  0%, 100% { scale: 1.1 1; opacity: 1; animation-timing-function: cubic-bezier(.33, 1, .68, 1); }
  50% { scale: .4 1; opacity: .25; animation-timing-function: cubic-bezier(.32, 0, .67, 0); }
}

/* =========================================================
   常见问题
   ========================================================= */
.faq__inner { display: grid; grid-template-columns: 1fr 1.5fr; gap: 64px; align-items: start; }
.faq__head { position: sticky; top: 120px; }
.faq__head h2 { margin-top: 20px; font-size: clamp(34px, 4.2vw, 60px); }

.qa { border-bottom: 1px solid var(--rule); }
.qa:first-child { border-top: 1px solid var(--rule); }
.qa summary {
  position: relative;
  padding: 26px 56px 26px 0;
  font-family: var(--f-display);
  font-size: clamp(18px, 1.6vw, 22px);
  line-height: 1.45;
  list-style: none;
  cursor: pointer;
  transition: color .3s;
}
.qa summary::-webkit-details-marker { display: none; }
/* 右侧加号，展开时转成减号 */
.qa summary::before,
.qa summary::after {
  content: "";
  position: absolute;
  right: 12px;
  top: 50%;
  width: 18px;
  height: 2px;
  background: currentColor;
  transition: transform .5s var(--ease);
}
.qa summary::after { transform: rotate(90deg); }
.qa[open] summary::after { transform: rotate(0); }
.qa summary:hover { color: var(--brand); }
.qa__body { overflow: hidden; }
.qa__body p { padding: 0 48px 28px 0; color: var(--ink-dim); }

/* =========================================================
   页脚
   ========================================================= */
.footer {
  position: relative;
  overflow: hidden;
  padding: 96px 0 0;
  background: #040d09;
  color: var(--chalk-dim);
}
.footer__top { display: flex; justify-content: space-between; gap: 48px; padding-bottom: 64px; }
.footer__brand img { border-radius: 50%; }
.footer__slogan { margin-top: 18px; font-family: var(--f-display); font-size: 22px; color: var(--chalk); }
.footer__cols { display: flex; gap: clamp(40px, 7vw, 120px); }
.footer__cols div { display: grid; align-content: start; gap: 12px; }
.footer__title { margin-bottom: 4px; font-size: 13px; letter-spacing: .2em; color: rgba(238, 243, 234, .4); }
.footer__cols a { transition: color .3s; }
.footer__cols a:hover { color: var(--ball); }
/* 公司业务与登记信息融入页脚，沿用全站细分隔线、字体和深绿配色。 */
.footer__company {
  display: grid;
  grid-template-columns: 1.15fr 1fr;
  gap: clamp(40px, 7vw, 120px);
  padding: 40px 0;
  border-top: 1px solid var(--line);
  scroll-margin-top: 120px;
}
.footer__company h3 { margin-top: 16px; font-size: clamp(20px, 2vw, 28px); color: var(--chalk); }
.footer__intro { margin-top: 18px; max-width: 560px; font-size: 14px; line-height: 1.9; }
.footer__contact { display: grid; align-content: start; gap: 24px; }
.footer__contact dd { max-width: 440px; font-size: 14px; }
.footer__contact a { font-size: clamp(26px, 3vw, 36px); line-height: 1.2; color: var(--chalk); transition: color .3s; }
.footer__contact a:hover { color: var(--ball); }
.footer__bottom {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 8px 32px;
  padding: 24px 0;
  border-top: 1px solid var(--line);
  font-size: 13px;
  color: rgba(238, 243, 234, .45);
}
.footer__giant {
  margin: 0 0 -.18em;
  font-family: var(--f-display);
  font-size: 23vw;
  line-height: 1;
  text-align: center;
  white-space: nowrap;
  color: transparent;
  -webkit-text-stroke: 1px rgba(238, 243, 234, .12);
  user-select: none;
}

/* =========================================================
   文档页（GTR 说明等）
   ========================================================= */
.doc-hero {
  position: relative;
  padding: 180px 0 96px;
  overflow: hidden;
  background: var(--court);
}
.doc-hero .hero__glow { opacity: .8; }
.doc-hero__ball {
  position: absolute;
  top: 50%;
  right: 8%;
  width: clamp(160px, 22vw, 320px);
  aspect-ratio: 1;
  margin-top: calc(clamp(160px, 22vw, 320px) / -2 + 40px);
  filter: drop-shadow(0 0 60px rgba(216, 242, 74, .35));
  animation: spin 40s linear infinite;
}
.doc-hero__ball svg { width: 100%; height: 100%; }
@keyframes spin {
  to { rotate: 360deg; }
}
.crumbs { position: relative; display: flex; gap: 10px; font-size: 14px; color: var(--chalk-dim); }
.crumbs a:hover { color: var(--ball); }
.doc-hero h1 { position: relative; margin-top: 28px; font-size: clamp(44px, 7vw, 104px); line-height: 1.08; }
.doc-hero__lead { position: relative; max-width: 720px; margin-top: 28px; font-size: clamp(16px, 1.3vw, 19px); color: var(--chalk-dim); }
.doc-hero__meta { position: relative; margin-top: 24px; font-size: 13px; color: rgba(238, 243, 234, .45); }

.doc { padding: clamp(72px, 9vw, 120px) 0; background: var(--paper); color: var(--ink); }
.doc__layout { display: grid; grid-template-columns: 240px 1fr; gap: clamp(40px, 6vw, 96px); align-items: start; }
.doc__toc { position: sticky; top: 120px; display: grid; gap: 4px; font-size: 14px; }
.doc__toc p { margin-bottom: 8px; font-size: 13px; letter-spacing: .2em; color: var(--ink-dim); }
.doc__toc a { padding: 6px 0 6px 14px; border-left: 2px solid var(--rule); color: var(--ink-dim); transition: color .3s, border-color .3s; }
.doc__toc a:hover,
.doc__toc a.is-active { color: var(--ink); border-color: var(--ball); }

.doc__body { max-width: 760px; }
.doc__body section + section { margin-top: 80px; }
.doc__body h2 { font-size: clamp(28px, 3vw, 40px); scroll-margin-top: 100px; }
.doc__body h3 { margin-top: 36px; font-size: 22px; }
.doc__body p { margin-top: 18px; color: #2f3d36; }
.doc__body ul { margin-top: 18px; display: grid; gap: 10px; }
.doc__body ul li { position: relative; padding-left: 22px; color: #2f3d36; }
.doc__body ul li::before { content: ""; position: absolute; left: 0; top: .7em; width: 8px; height: 8px; border-radius: 50%; background: var(--brand); }

/* 一句话定义框：给 AI 摘要直接引用 */
.tldr {
  margin-top: 0;
  padding: 28px 32px;
  border-radius: 20px;
  background: var(--ink);
  color: var(--chalk);
}
.tldr b { display: block; margin-bottom: 8px; font-size: 13px; letter-spacing: .2em; color: var(--ball); }
.doc__body .tldr p { margin: 0; color: var(--chalk); font-size: 17px; }

/* 文档里的表格 */
.table-wrap { margin-top: 24px; overflow-x: auto; border: 1px solid var(--rule); border-radius: 18px; background: var(--paper-2); }
.doc table { width: 100%; border-collapse: collapse; font-size: 15px; }
.doc th,
.doc td { padding: 14px 18px; text-align: left; vertical-align: top; border-bottom: 1px solid var(--rule); }
.doc th { font-weight: 600; color: var(--ink-dim); background: var(--paper); white-space: nowrap; }
.doc tr:last-child td { border-bottom: 0; }
.doc td:first-child { font-family: var(--f-num); font-weight: 900; font-size: 18px; white-space: nowrap; }

.factor-list { margin-top: 24px; counter-reset: f; }
.factor-list li {
  padding: 18px 0 18px 56px;
  border-top: 1px solid var(--rule);
  position: relative;
  counter-increment: f;
  color: #2f3d36;
}
.factor-list li::before {
  content: counter(f, decimal-leading-zero);
  position: absolute;
  left: 0;
  top: 18px;
  font-family: var(--f-num);
  font-weight: 900;
  color: var(--brand);
}
.factor-list b { display: block; font-family: var(--f-display); font-weight: 700; font-size: 18px; color: var(--ink); }

/* =========================================================
   响应式
   ========================================================= */
@media (max-width: 1100px) {
  .nav__links,
  .nav__cta { display: none; }
  .nav__toggle { display: block; }

  .hero__court { right: -24vw; width: 90vw; opacity: .7; }
  .hero__device { right: 5%; top: 20%; }
  .hero__device .phone { --w: 240px; }

  .factors li { grid-template-columns: 40px 1fr; }
  .factors li span { grid-column: 2; }
  .factors b { grid-column: 2; }
}

@media (max-width: 1023px) {
  .gtr__intro,
  .gtr__grid,
  .start__inner,
  .faq__inner { grid-template-columns: 1fr; }
  .faq__head { position: static; }

  /* 赛事流程改为纵向两列卡片，不再钉住横向滚动 */
  .events { padding: clamp(96px, 13vw, 140px) 0; }
  .events__pin { min-height: 0; padding: 0; }
  .events__track {
    display: grid;
    grid-template-columns: 1fr 1fr;
    width: auto;
    padding: 0 var(--gutter);
  }
  .events__head { display: block; }
  .events__head .section__desc { margin-top: 24px; }
  .stage { width: auto; height: auto; }
  .events__progress { display: none; }

  .doc__layout { grid-template-columns: 1fr; }
  .doc__toc { display: none; }
  .doc-hero__ball { top: 110px; right: -40px; margin-top: 0; opacity: .5; }
}

@media (max-width: 720px) {
  /* 手机端：手机居中放在按钮下方，露出到约球入口，往下滑就能看到 */
  .hero { align-items: flex-start; padding: 120px 0 480px; }
  .hero__court { top: auto; bottom: -10%; right: -40vw; width: 130vw; transform: none; opacity: .55; }
  .hero__device { top: auto; right: auto; bottom: -100px; left: 50%; translate: -50% 0; }
  .hero__device .phone {
    --w: 250px;
    transform: perspective(1800px) rotateX(calc(4deg + var(--tx, 0) * 1deg)) rotateY(calc(-6deg + var(--ty, 0) * 1deg)) rotateZ(2deg);
  }
  .hero__actions .btn { width: 100%; justify-content: center; }
  .hero__scroll { display: none; }

  .facts { grid-template-columns: 1fr 1fr; }
  .facts__item:nth-child(3) { padding-left: 0; border-left: 0; }
  .facts__item:nth-child(n + 3) { margin-top: 24px; border-top: 1px solid var(--rule); }

  .play__cards,
  .clan__grid,
  .bento,
  .events__track { grid-template-columns: 1fr; }
  .bento__item--rank { grid-row: auto; }

  .flow li + li { margin-left: 0; }
  .flow li + li::before { display: none; }

  .meter { grid-template-columns: 1fr; }
  .meter__desc { justify-self: start; margin-top: 16px; }
  .meter__tag { margin-top: .6em; }
  .meter__ruler { height: 56px; }
  .meter__scale { font-size: 13px; }

  .factors li { grid-template-columns: 36px 1fr; }
  .placement { grid-template-columns: 1fr; }
  .placement__dots { grid-template-columns: repeat(8, 18px); gap: 10px; }
  .placement__dots i { width: 18px; height: 18px; }

  .boards > div { grid-template-columns: 1fr; gap: 4px; }
  .duo__art { width: 64px; top: 20px; right: 20px; }
  .duo h3 { max-width: calc(100% - 72px); }

  .start__bouncer { top: auto; bottom: -20px; right: 0; transform: scale(.7); transform-origin: bottom right; }

  .qa summary { padding-right: 44px; }
  .qa__body p { padding-right: 0; }

  /* 窄屏下公司简介与联系方式顺序排列，保持页脚留白。 */
  .footer__company { grid-template-columns: 1fr; gap: 32px; }
  .footer__top { flex-direction: column; }
  .footer__cols { flex-wrap: wrap; gap: 32px 48px; }
}