/* ============================================================
   开球 OS 官网 - 全站共享样式
   高级赛事绿 / 深色科技极简 / 毛玻璃 UI / 响应式
   ============================================================ */

/* ---------- 变量与基础 ---------- */
:root {
  --green: #21e691;
  --green-soft: #6ef7ba;
  --green-dim: #12b26b;
  --green-deep: #0a4d33;
  --bg: #050907;
  --bg-soft: #0a120d;
  --bg-card: rgba(255, 255, 255, 0.045);
  --glass: rgba(10, 26, 18, 0.55);
  --glass-strong: rgba(8, 20, 14, 0.75);
  --border: rgba(33, 230, 145, 0.16);
  --border-soft: rgba(255, 255, 255, 0.08);
  --text: #edf7f1;
  --text-soft: #a9bdb1;
  --text-dim: #6d8377;
  --radius: 16px;
  --radius-lg: 24px;
  --shadow: 0 20px 60px rgba(0, 0, 0, 0.45);
  --font: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
}

* { margin: 0; padding: 0; box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
ul { list-style: none; }

::selection { background: var(--green); color: #04130b; }

/* ---------- 工具类 ---------- */
.container { width: min(1160px, 92%); margin: 0 auto; }

.section { padding: 96px 0; position: relative; }

.section-tag {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  letter-spacing: 2px;
  color: var(--green);
  text-transform: uppercase;
  margin-bottom: 14px;
}
.section-tag::before {
  content: "";
  width: 22px;
  height: 2px;
  background: var(--green);
  border-radius: 2px;
}

.section-title {
  font-size: clamp(26px, 4vw, 40px);
  font-weight: 700;
  line-height: 1.3;
  margin-bottom: 14px;
  background: linear-gradient(120deg, #ffffff 30%, var(--green-soft) 70%, var(--green) 100%);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

.section-sub {
  color: var(--text-soft);
  font-size: 16px;
  max-width: 640px;
}

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

/* 毛玻璃卡片 */
.glass-card {
  background: var(--glass);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
  box-shadow: var(--shadow);
}

/* ---------- 按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 14px 34px;
  border-radius: 999px;
  font-size: 15px;
  font-weight: 600;
  letter-spacing: 0.5px;
  cursor: pointer;
  border: none;
  transition: transform 0.25s ease, box-shadow 0.25s ease, background 0.25s ease, color 0.25s ease;
  white-space: nowrap;
}
.btn-green {
  background: linear-gradient(135deg, var(--green) 0%, var(--green-dim) 100%);
  color: #04130b;
  box-shadow: 0 10px 30px rgba(33, 230, 145, 0.28);
}
.btn-green:hover {
  transform: translateY(-3px);
  box-shadow: 0 16px 40px rgba(33, 230, 145, 0.4);
}
.btn-ghost {
  background: var(--glass);
  border: 1px solid var(--border);
  color: var(--text);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
}
.btn-ghost:hover {
  border-color: var(--green);
  color: var(--green);
  transform: translateY(-3px);
}
.btn-lg { padding: 16px 42px; font-size: 16px; }

/* ---------- 顶部导航 ---------- */
.nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  transition: background 0.3s ease, border-color 0.3s ease, backdrop-filter 0.3s ease;
  border-bottom: 1px solid transparent;
}
.nav.scrolled {
  background: var(--glass-strong);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom-color: var(--border-soft);
}
.nav-inner {
  width: min(1200px, 94%);
  margin: 0 auto;
  height: 74px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
}
.nav-logo {
  display: flex;
  align-items: center;
  gap: 12px;
  font-weight: 700;
  font-size: 19px;
  letter-spacing: 1px;
  flex-shrink: 0;
}
.nav-logo img { height: 40px; width: auto; }
.nav-logo .logo-text b { color: #fff; font-weight: 700; }
.nav-logo .logo-text span { color: var(--green); }
.nav-menu {
  display: flex;
  align-items: center;
  gap: 34px;
}
.nav-menu a {
  font-size: 15px;
  color: var(--text-soft);
  position: relative;
  padding: 6px 0;
  transition: color 0.25s ease;
}
.nav-menu a::after {
  content: "";
  position: absolute;
  left: 0; bottom: 0;
  width: 0; height: 2px;
  background: var(--green);
  border-radius: 2px;
  transition: width 0.3s ease;
}
.nav-menu a:hover, .nav-menu a.active { color: #fff; }
.nav-menu a:hover::after, .nav-menu a.active::after { width: 100%; }
.nav-toggle {
  display: none;
  width: 42px; height: 42px;
  border: 1px solid var(--border);
  border-radius: 10px;
  background: var(--glass);
  cursor: pointer;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 5px;
}
.nav-toggle span {
  display: block;
  width: 18px; height: 2px;
  background: var(--text);
  border-radius: 2px;
  transition: transform 0.3s ease, opacity 0.3s ease;
}
.nav-toggle.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-toggle.open span:nth-child(2) { opacity: 0; }
.nav-toggle.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ---------- 页脚 ---------- */
.footer {
  border-top: 1px solid var(--border-soft);
  background: linear-gradient(180deg, transparent, rgba(5, 14, 9, 0.9));
  padding: 56px 0 34px;
  position: relative;
}
.footer-inner {
  width: min(1200px, 94%);
  margin: 0 auto;
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1.4fr;
  gap: 40px;
}
.footer h4 {
  font-size: 15px;
  color: #fff;
  margin-bottom: 16px;
  letter-spacing: 1px;
}
.footer-links a {
  display: block;
  color: var(--text-soft);
  font-size: 14px;
  padding: 5px 0;
  transition: color 0.2s ease, padding-left 0.2s ease;
}
.footer-links a:hover { color: var(--green); padding-left: 6px; }
.footer-brand p { color: var(--text-dim); font-size: 14px; margin-top: 10px; max-width: 280px; }
.footer-brand img { height: 36px; width: auto; margin-bottom: 4px; }
.footer-qr { text-align: center; }
.footer-qr img { width: 104px; height: 104px; border-radius: 12px; border: 1px solid var(--border); padding: 4px; background: #fff; margin: 0 auto 8px; }
.footer-qr span { font-size: 12px; color: var(--text-dim); }
.footer-bottom {
  margin-top: 44px;
  padding-top: 22px;
  border-top: 1px solid var(--border-soft);
  text-align: center;
  color: var(--text-dim);
  font-size: 13px;
}

/* ---------- 通用内页 Hero ---------- */
.page-hero {
  position: relative;
  padding: 168px 0 96px;
  text-align: center;
  overflow: hidden;
}
.page-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse 700px 340px at 50% -10%, rgba(33, 230, 145, 0.14), transparent 65%),
    radial-gradient(ellipse 500px 300px at 85% 110%, rgba(33, 230, 145, 0.08), transparent 60%);
  pointer-events: none;
}
.page-hero .container { position: relative; z-index: 2; }
.page-hero .section-title { font-size: clamp(30px, 5vw, 52px); }
.page-hero .section-sub { margin: 0 auto; }

/* ---------- 首页 Hero 视频层 ---------- */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  overflow: hidden;
}
.hero-media {
  position: absolute;
  inset: 0;
  z-index: 1;
}
.hero-media video,
.hero-media .hero-fallback {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.hero-fallback {
  background: var(--bg-soft) url("../images/banner-fallback.jpg") center/cover no-repeat;
  opacity: 1;
}
.hero-media video.show { opacity: 1; }
.hero-media video {
  opacity: 0;
  transition: opacity 0.6s ease;
}
.hero-overlay {
  position: absolute;
  inset: 0;
  z-index: 2;
  background:
    linear-gradient(180deg, rgba(5, 9, 7, 0.55) 0%, rgba(5, 9, 7, 0.25) 40%, rgba(5, 9, 7, 0.75) 82%, var(--bg) 100%);
  pointer-events: none;
}
.hero-content {
  position: relative;
  z-index: 3;
  padding: 140px 20px 120px;
  max-width: 900px;
  margin: 0 auto;
}
.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 20px;
  border-radius: 999px;
  background: var(--glass);
  border: 1px solid var(--border);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  font-size: 13px;
  letter-spacing: 2px;
  color: var(--green-soft);
  margin-bottom: 28px;
}
.hero-badge::before {
  content: "";
  width: 7px; height: 7px;
  border-radius: 50%;
  background: var(--green);
  box-shadow: 0 0 12px var(--green);
  animation: pulse 2s infinite;
}
@keyframes pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.5; transform: scale(0.8); }
}
.hero-title {
  font-size: clamp(34px, 6vw, 66px);
  font-weight: 800;
  line-height: 1.18;
  margin-bottom: 20px;
  text-shadow: 0 4px 30px rgba(0, 0, 0, 0.6);
}
.hero-title em {
  font-style: normal;
  background: linear-gradient(120deg, var(--green) 0%, var(--green-soft) 100%);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}
.hero-sub {
  font-size: clamp(16px, 2.4vw, 22px);
  color: var(--text-soft);
  letter-spacing: 2px;
  margin-bottom: 44px;
  text-shadow: 0 2px 16px rgba(0, 0, 0, 0.7);
}
.hero-actions { display: flex; justify-content: center; gap: 18px; flex-wrap: wrap; }
.hero-scroll {
  position: absolute;
  bottom: 66px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 3;
  width: 26px; height: 44px;
  border: 2px solid rgba(237, 247, 241, 0.45);
  border-radius: 16px;
  display: flex;
  justify-content: center;
  padding-top: 8px;
}
.hero-scroll::after {
  content: "";
  width: 4px; height: 9px;
  border-radius: 4px;
  background: var(--green);
  animation: scrollDot 1.6s infinite;
}
@keyframes scrollDot {
  0% { transform: translateY(0); opacity: 1; }
  70% { transform: translateY(14px); opacity: 0; }
  100% { transform: translateY(0); opacity: 0; }
}

/* ---------- 首页：亮点卡片 ---------- */
.features-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 26px;
  margin-top: 56px;
}
.feature-card {
  padding: 36px 32px;
  position: relative;
  overflow: hidden;
  transition: transform 0.3s ease, border-color 0.3s ease, box-shadow 0.3s ease;
}
.feature-card::before {
  content: "";
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 2px;
  background: linear-gradient(90deg, transparent, var(--green), transparent);
  opacity: 0;
  transition: opacity 0.3s ease;
}
.feature-card:hover {
  transform: translateY(-6px);
  border-color: rgba(33, 230, 145, 0.4);
  box-shadow: 0 24px 60px rgba(0, 0, 0, 0.5);
}
.feature-card:hover::before { opacity: 1; }
.feature-icon {
  width: 54px; height: 54px;
  border-radius: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, rgba(33, 230, 145, 0.18), rgba(33, 230, 145, 0.05));
  border: 1px solid var(--border);
  margin-bottom: 22px;
}
.feature-icon svg { width: 28px; height: 28px; stroke: var(--green); }
.feature-card h3 { font-size: 21px; font-weight: 700; margin-bottom: 12px; }
.feature-card p { color: var(--text-soft); font-size: 15px; }

/* ---------- 首页：数据模块 ---------- */
.stats {
  background: var(--bg-soft);
  border-top: 1px solid var(--border-soft);
  border-bottom: 1px solid var(--border-soft);
}
.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 30px;
  text-align: center;
}
.stat-item { padding: 12px 8px; }
.stat-num {
  font-size: clamp(32px, 4.6vw, 52px);
  font-weight: 800;
  background: linear-gradient(120deg, #fff 10%, var(--green) 90%);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  line-height: 1.2;
}
.stat-label { color: var(--text-soft); font-size: 15px; margin-top: 8px; letter-spacing: 1px; }

/* ---------- 首页：底部简介 ---------- */
.closing {
  text-align: center;
  background:
    radial-gradient(ellipse 900px 420px at 50% 120%, rgba(33, 230, 145, 0.1), transparent 65%);
}
.closing-title { font-size: clamp(22px, 3.4vw, 38px); font-weight: 700; line-height: 1.5; }
.closing-title em {
  font-style: normal;
  background: linear-gradient(120deg, var(--green), var(--green-soft));
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

/* ---------- 产品能力（编号模块） ---------- */
.cap-list { display: flex; flex-direction: column; gap: 28px; margin-top: 56px; }
.cap-row {
  padding: 40px 38px;
  display: grid;
  grid-template-columns: 96px 1fr;
  gap: 30px;
  align-items: start;
  transition: transform 0.3s ease, border-color 0.3s ease;
}
.cap-row:hover { transform: translateX(8px); border-color: rgba(33, 230, 145, 0.4); }
.cap-num {
  font-size: 42px;
  font-weight: 800;
  color: transparent;
  -webkit-text-stroke: 1.5px var(--green);
  line-height: 1;
  padding-top: 6px;
}
.cap-row h3 { font-size: 22px; font-weight: 700; margin-bottom: 14px; }
.cap-points {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 14px 26px;
}
.cap-points li {
  color: var(--text-soft);
  font-size: 15px;
  padding-left: 24px;
  position: relative;
}
.cap-points li::before {
  content: "";
  position: absolute;
  left: 0; top: 10px;
  width: 9px; height: 9px;
  border-radius: 50%;
  background: var(--green);
  box-shadow: 0 0 10px rgba(33, 230, 145, 0.5);
}
.cap-full p { color: var(--text-soft); font-size: 15px; }

/* ---------- 四端互通 ---------- */
.eco-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 22px;
  margin-top: 56px;
}
.eco-card {
  padding: 34px 26px;
  text-align: center;
  transition: transform 0.3s ease, border-color 0.3s ease;
}
.eco-card:hover { transform: translateY(-6px); border-color: rgba(33, 230, 145, 0.4); }
.eco-icon {
  width: 74px; height: 74px;
  margin: 0 auto 20px;
  border-radius: 20px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, rgba(33, 230, 145, 0.2), rgba(33, 230, 145, 0.06));
  border: 1px solid var(--border);
}
.eco-icon svg { width: 36px; height: 36px; stroke: var(--green); fill: none; stroke-width: 1.6; }
.eco-card h3 { font-size: 19px; margin-bottom: 12px; }
.eco-card p { color: var(--text-soft); font-size: 14px; }
.eco-banner {
  margin-top: 64px;
  padding: 44px 40px;
  text-align: center;
  background: var(--glass);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
  position: relative;
  overflow: hidden;
}
.eco-banner::before {
  content: "";
  position: absolute;
  inset: -40% -20%;
  background: radial-gradient(ellipse at center, rgba(33, 230, 145, 0.12), transparent 60%);
  pointer-events: none;
}
.eco-banner h3 {
  font-size: clamp(20px, 3vw, 30px);
  font-weight: 700;
  position: relative;
  z-index: 1;
}
.eco-banner p { color: var(--text-soft); margin-top: 10px; position: relative; z-index: 1; }
.eco-banner em {
  font-style: normal;
  background: linear-gradient(120deg, var(--green), var(--green-soft));
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

/* ---------- 球房商家入驻 ---------- */
.merit-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  margin-top: 56px;
}
.merit-card {
  padding: 32px 28px;
  transition: transform 0.3s ease, border-color 0.3s ease;
}
.merit-card:hover { transform: translateY(-6px); border-color: rgba(33, 230, 145, 0.4); }
.merit-card .merit-icon {
  width: 46px; height: 46px;
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 18px;
  background: var(--glass);
  border: 1px solid var(--border);
}
.merit-card .merit-icon svg { width: 22px; height: 22px; stroke: var(--green); fill: none; stroke-width: 2; }
.merit-card h3 { font-size: 18px; margin-bottom: 10px; }
.merit-card p { color: var(--text-soft); font-size: 14px; }

.steps {
  margin-top: 56px;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 22px;
  counter-reset: step;
}
.step-card {
  padding: 30px 24px;
  position: relative;
  transition: transform 0.3s ease, border-color 0.3s ease;
}
.step-card:hover { transform: translateY(-6px); border-color: rgba(33, 230, 145, 0.4); }
.step-num {
  width: 44px; height: 44px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--green), var(--green-dim));
  color: #04130b;
  font-weight: 800;
  font-size: 18px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 18px;
}
.step-card h3 { font-size: 17px; margin-bottom: 10px; }
.step-card p { color: var(--text-soft); font-size: 14px; }
.step-arrow {
  position: absolute;
  top: 42px; right: -16px;
  color: var(--green);
  font-size: 20px;
  z-index: 3;
}

/* ---------- AI 专题 ---------- */
.ai-hero {
  position: relative;
  padding: 170px 0 110px;
  text-align: center;
  overflow: hidden;
  background:
    radial-gradient(ellipse 800px 420px at 50% -10%, rgba(33, 230, 145, 0.18), transparent 62%),
    var(--bg);
}
.ai-hero .ai-big-title {
  font-size: clamp(32px, 5.4vw, 62px);
  font-weight: 800;
  line-height: 1.3;
  margin: 18px auto 20px;
  max-width: 900px;
}
.ai-hero .ai-big-title em {
  font-style: normal;
  background: linear-gradient(120deg, var(--green) 0%, var(--green-soft) 100%);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}
.ai-flow {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  margin-top: 70px;
}
.ai-flow-card {
  padding: 34px 28px;
  text-align: left;
  position: relative;
}
.ai-flow-card .flow-step {
  font-size: 13px;
  letter-spacing: 2px;
  color: var(--green);
  margin-bottom: 10px;
  font-weight: 600;
}
.ai-flow-card h3 { font-size: 20px; margin-bottom: 12px; }
.ai-flow-card p { color: var(--text-soft); font-size: 14px; }
.ai-diagram {
  margin-top: 70px;
  padding: 46px 40px;
  text-align: center;
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  background: var(--glass);
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
  position: relative;
  overflow: hidden;
}
.ai-diagram::before {
  content: "";
  position: absolute;
  inset: -50% -30%;
  background: radial-gradient(ellipse at 50% 0%, rgba(33, 230, 145, 0.14), transparent 55%);
  pointer-events: none;
}
.ai-diagram h3 { font-size: clamp(20px, 3vw, 30px); font-weight: 700; position: relative; z-index: 1; }
.ai-diagram p { color: var(--text-soft); margin-top: 12px; position: relative; z-index: 1; }
.ai-chain {
  display: flex;
  align-items: center;
  justify-content: center;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 30px;
  position: relative;
  z-index: 1;
}
.ai-chain .cell {
  padding: 12px 22px;
  border-radius: 999px;
  background: rgba(33, 230, 145, 0.1);
  border: 1px solid var(--border);
  font-size: 14px;
  font-weight: 500;
}
.ai-chain .cell.hot {
  background: linear-gradient(135deg, var(--green), var(--green-dim));
  color: #04130b;
  font-weight: 700;
  border: none;
}
.ai-chain .arrow { color: var(--green); font-size: 18px; }

/* ---------- 关于我们 ---------- */
.about-brand {
  display: grid;
  grid-template-columns: 1.1fr 1fr;
  gap: 50px;
  align-items: center;
  margin-top: 50px;
}
.about-brand .ab-logo { text-align: center; }
.about-brand .ab-logo img {
  width: 220px;
  margin: 0 auto 22px;
  filter: drop-shadow(0 10px 30px rgba(33, 230, 145, 0.2));
}
.about-brand h3 { font-size: 22px; font-weight: 700; margin-bottom: 16px; }
.about-brand p { color: var(--text-soft); font-size: 15px; margin-bottom: 14px; }
.about-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 9px 20px;
  border-radius: 999px;
  background: rgba(33, 230, 145, 0.1);
  border: 1px solid var(--border);
  color: var(--green-soft);
  font-size: 14px;
  letter-spacing: 1px;
}
.club-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 22px;
  margin-top: 44px;
}
.club-card {
  padding: 28px 24px;
  text-align: center;
  transition: transform 0.3s ease, border-color 0.3s ease;
}
.club-card:hover { transform: translateY(-5px); border-color: rgba(33, 230, 145, 0.4); }
.club-card .club-icon {
  width: 52px; height: 52px;
  margin: 0 auto 16px;
  border-radius: 14px;
  background: linear-gradient(135deg, rgba(33, 230, 145, 0.18), rgba(33, 230, 145, 0.05));
  border: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 800;
  color: var(--green);
  font-size: 18px;
}
.club-card h4 { font-size: 16px; margin-bottom: 6px; }
.club-card p { color: var(--text-dim); font-size: 13px; }

.contact-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  margin-top: 44px;
}
.contact-card {
  padding: 32px 28px;
  text-align: center;
  transition: transform 0.3s ease, border-color 0.3s ease;
}
.contact-card:hover { transform: translateY(-5px); border-color: rgba(33, 230, 145, 0.4); }
.contact-card .ct-icon {
  width: 52px; height: 52px;
  margin: 0 auto 16px;
  border-radius: 50%;
  background: var(--glass);
  border: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: center;
}
.contact-card .ct-icon svg { width: 24px; height: 24px; stroke: var(--green); fill: none; stroke-width: 1.8; }
.contact-card h4 { font-size: 17px; margin-bottom: 8px; }
.contact-card p { color: var(--text-soft); font-size: 14px; }
.contact-card a:hover { color: var(--green); }

.contact-split {
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: 28px;
  margin-top: 60px;
  align-items: stretch;
}
.contact-split .glass-card { padding: 38px 34px; }
.qr-big { text-align: center; }
.qr-big img {
  width: 168px; height: 168px;
  margin: 0 auto 14px;
  border-radius: 16px;
  border: 1px solid var(--border);
  padding: 6px;
  background: #fff;
}
.qr-big span { color: var(--text-soft); font-size: 14px; display: block; }
.cta-row { display: flex; gap: 14px; flex-wrap: wrap; margin-top: 22px; justify-content: center; }

/* ---------- 滚动渐入动画 ---------- */
.reveal {
  opacity: 0;
  transform: translateY(32px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}
.reveal.in { opacity: 1; transform: translateY(0); }
.reveal.d1 { transition-delay: 0.08s; }
.reveal.d2 { transition-delay: 0.16s; }
.reveal.d3 { transition-delay: 0.24s; }

/* ---------- 响应式 ---------- */
@media (max-width: 1024px) {
  .cap-row { grid-template-columns: 70px 1fr; }
  .merit-grid { grid-template-columns: repeat(2, 1fr); }
  .eco-grid { grid-template-columns: repeat(2, 1fr); }
  .steps { grid-template-columns: repeat(2, 1fr); }
  .club-grid { grid-template-columns: repeat(2, 1fr); }
  .contact-grid { grid-template-columns: repeat(2, 1fr); }
  .footer-inner { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 768px) {
  .section { padding: 72px 0; }
  .nav-toggle { display: flex; }
  .nav-menu {
    position: fixed;
    top: 74px; left: 0; right: 0;
    flex-direction: column;
    gap: 0;
    background: var(--glass-strong);
    backdrop-filter: blur(24px);
    -webkit-backdrop-filter: blur(24px);
    border-bottom: 1px solid var(--border-soft);
    padding: 12px 6%;
    transform: translateY(-16px);
    opacity: 0;
    pointer-events: none;
    transition: transform 0.3s ease, opacity 0.3s ease;
  }
  .nav-menu.open { transform: translateY(0); opacity: 1; pointer-events: auto; }
  .nav-menu a { display: block; padding: 14px 0; border-bottom: 1px solid rgba(255, 255, 255, 0.06); font-size: 16px; }
  .nav-menu a:last-child { border-bottom: none; }
  .features-grid { grid-template-columns: 1fr; }
  .stats-grid { grid-template-columns: repeat(2, 1fr); gap: 26px; }
  .cap-row { grid-template-columns: 1fr; gap: 14px; padding: 30px 26px; }
  .cap-points { grid-template-columns: 1fr; }
  .about-brand { grid-template-columns: 1fr; gap: 34px; text-align: center; }
  .about-brand .ab-logo img { margin: 0 auto 18px; }
  .contact-split { grid-template-columns: 1fr; }
  .hero-actions .btn { flex: 1; min-width: 200px; }
}

@media (max-width: 560px) {
  .merit-grid { grid-template-columns: 1fr; }
  .eco-grid { grid-template-columns: 1fr; }
  .steps { grid-template-columns: 1fr; }
  .club-grid { grid-template-columns: 1fr; }
  .contact-grid { grid-template-columns: 1fr; }
  .footer-inner { grid-template-columns: 1fr; gap: 28px; }
  .ai-chain { flex-direction: column; }
  .ai-chain .arrow { transform: rotate(90deg); }
  .step-arrow { display: none; }
  .hero { min-height: 92vh; }
  .hero-content { padding: 120px 16px 96px; }
  .hero-scroll { display: none; }
  .hero-actions { flex-direction: column; align-items: stretch; max-width: 320px; margin: 0 auto; }
  .hero-actions .btn { width: 100%; min-width: 0; }
}