/* ============================================================
   上海峥呈信息科技有限公司 官网样式
   深空蓝 + 科技青 浅色科技平台风格
   ============================================================ */

:root {
  --primary: #0A2540;
  --primary-light: #1B4D7A;
  --accent: #00C2A8;
  --accent-light: #5EEAD4;
  --accent-dark: #00867A;
  --bg: #F7FAFC;
  --bg-soft: #EDF4F8;
  --bg-card: #FFFFFF;
  --text: #1A2B42;
  --text-light: #5A6B82;
  --text-muted: #8A9BB2;
  --border: #DCE6EF;
  --dark: #061A2E;
  --gradient-primary: linear-gradient(135deg, #0A2540, #061A2E);
  --gradient-accent: linear-gradient(135deg, #00C2A8, #00867A);
  --gradient-hero: linear-gradient(135deg, #0A2540 0%, #1B4D7A 50%, #00867A 100%);
  --gradient-card: linear-gradient(145deg, #FFFFFF, #F7FAFC);
  --shadow-sm: 0 2px 8px rgba(10, 37, 64, 0.06);
  --shadow-md: 0 8px 28px rgba(10, 37, 64, 0.10);
  --shadow-lg: 0 16px 48px rgba(10, 37, 64, 0.14);
  --radius: 10px;
  --radius-sm: 6px;
  --font: 'Noto Sans SC', 'HarmonyOS Sans SC', 'Source Han Sans CN', 'PingFang SC', 'Microsoft YaHei', sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', 'Consolas', monospace;
}

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

html { scroll-behavior: smooth; }

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

a { color: inherit; text-decoration: none; transition: color 0.2s; }
a:hover { color: var(--accent); }
img { max-width: 100%; display: block; }

.container { max-width: 1200px; margin: 0 auto; padding: 0 24px; }

/* ============ 导航 ============ */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255, 255, 255, 0.96);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
  box-shadow: var(--shadow-sm);
}
.nav-wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
  gap: 24px;
}
.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-shrink: 0;
}
.brand-mark {
  width: 38px;
  height: 38px;
  border-radius: 8px;
  background: var(--gradient-hero);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-weight: 800;
  font-size: 18px;
  letter-spacing: -1px;
  box-shadow: 0 4px 12px rgba(0, 194, 168, 0.3);
}
.brand-text { display: flex; flex-direction: column; line-height: 1.2; }
.brand-text .name { font-size: 15px; font-weight: 700; color: var(--primary); white-space: nowrap; letter-spacing: -0.3px; }
.main-nav {
  display: flex;
  gap: 4px;
  align-items: center;
}
.main-nav a {
  padding: 8px 14px;
  font-size: 14px;
  font-weight: 500;
  color: var(--text-light);
  border-radius: var(--radius-sm);
  transition: all 0.2s;
  white-space: nowrap;
}
.main-nav a:hover { color: var(--primary); background: var(--bg-soft); }
.main-nav a.active { color: var(--accent-dark); background: rgba(0, 194, 168, 0.08); font-weight: 600; }
.nav-auth { display: flex; align-items: center; gap: 10px; flex-shrink: 0; }
.user-name { font-size: 13px; color: var(--text); font-weight: 500; margin-right: 4px; }
.link-logout { background: none; border: none; color: var(--text-muted); font-size: 13px; cursor: pointer; padding: 4px 8px; border-radius: 4px; }
.link-logout:hover { color: var(--accent-dark); background: var(--bg-soft); }

/* ============ 按钮 ============ */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  padding: 10px 22px;
  font-size: 14px;
  font-weight: 600;
  border-radius: var(--radius-sm);
  border: none;
  cursor: pointer;
  transition: all 0.25s;
  font-family: var(--font);
  text-decoration: none;
  white-space: nowrap;
}
.btn-sm { padding: 7px 16px; font-size: 13px; }
.btn-lg { padding: 14px 32px; font-size: 15px; }
.btn-accent { background: var(--gradient-accent); color: #fff; box-shadow: 0 4px 14px rgba(0, 194, 168, 0.3); }
.btn-accent:hover { transform: translateY(-2px); box-shadow: 0 8px 24px rgba(0, 194, 168, 0.4); color: #fff; }
.btn-dark { background: var(--primary); color: #fff; }
.btn-dark:hover { background: var(--dark); color: #fff; transform: translateY(-2px); }
.btn-outline-dark { background: transparent; color: var(--primary); border: 1.5px solid var(--primary); }
.btn-outline-dark:hover { background: var(--primary); color: #fff; }
.btn-ghost-light { background: rgba(255,255,255,0.12); color: #fff; border: 1px solid rgba(255,255,255,0.3); backdrop-filter: blur(8px); }
.btn-ghost-light:hover { background: rgba(255,255,255,0.22); color: #fff; }

/* ============ Hero ============ */
.hero {
  background: var(--gradient-hero);
  color: #fff;
  padding: 80px 0 90px;
  position: relative;
  overflow: hidden;
}
.hero::before {
  content: '';
  position: absolute;
  top: 0; right: 0;
  width: 60%;
  height: 100%;
  background: radial-gradient(ellipse at 70% 30%, rgba(0, 194, 168, 0.18) 0%, transparent 55%);
  pointer-events: none;
}
.hero::after {
  content: '';
  position: absolute;
  bottom: 0; left: 0;
  width: 100%;
  height: 2px;
  background: linear-gradient(90deg, transparent, var(--accent), transparent);
}
.hero-inner {
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: 60px;
  align-items: center;
  position: relative;
  z-index: 1;
}
.hero-eyebrow {
  display: inline-block;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 2px;
  color: var(--accent-light);
  font-family: var(--font-mono);
  padding: 6px 14px;
  background: rgba(0, 194, 168, 0.12);
  border-radius: 20px;
  border: 1px solid rgba(0, 194, 168, 0.3);
  margin-bottom: 24px;
}
.hero h1 {
  font-size: 44px;
  font-weight: 800;
  line-height: 1.25;
  margin-bottom: 20px;
  letter-spacing: -0.5px;
}
.hero h1 em { font-style: normal; color: var(--accent-light); }
.hero .lead {
  font-size: 16px;
  color: rgba(255, 255, 255, 0.82);
  line-height: 1.8;
  margin-bottom: 32px;
  max-width: 540px;
}
.hero-actions { display: flex; gap: 16px; flex-wrap: wrap; }
.hero-figure {
  position: relative;
}
.hero-figure img {
  width: 100%;
  border-radius: var(--radius);
  box-shadow: var(--shadow-lg);
}
.hero-figure .fig-badge {
  position: absolute;
  bottom: -20px;
  left: -20px;
  background: #fff;
  color: var(--primary);
  padding: 16px 24px;
  border-radius: var(--radius);
  box-shadow: var(--shadow-md);
  display: flex;
  flex-direction: column;
}
.hero-figure .fig-badge b { font-size: 28px; font-weight: 800; color: var(--accent-dark); }
.hero-figure .fig-badge span { font-size: 12px; color: var(--text-light); }

/* ============ 通用区块 ============ */
.section { padding: 72px 0; }
.section-soft { background: var(--bg-soft); }
.sec-head { margin-bottom: 48px; }
.sec-head.center { text-align: center; }
.sec-head.center .sec-sub { max-width: 640px; margin: 0 auto; }
.sec-eyebrow {
  display: block;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 2px;
  color: var(--accent-dark);
  font-family: var(--font-mono);
  margin-bottom: 12px;
}
.sec-head h2 {
  font-size: 32px;
  font-weight: 800;
  color: var(--primary);
  margin-bottom: 12px;
  letter-spacing: -0.3px;
}
.sec-sub { font-size: 15px; color: var(--text-light); line-height: 1.7; }
.sec-more {
  display: inline-block;
  font-size: 14px;
  font-weight: 600;
  color: var(--accent-dark);
  margin-top: 8px;
}
.sec-more:hover { color: var(--accent); }

/* ============ 产品/内容卡片 ============ */
.product-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}
.product-card {
  background: var(--bg-card);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  transition: all 0.3s;
  border: 1px solid var(--border);
}
.product-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-md); border-color: rgba(0, 194, 168, 0.3); }
.pc-img { height: 200px; overflow: hidden; position: relative; background: var(--gradient-primary); }
.pc-img img { width: 100%; height: 100%; object-fit: cover; transition: transform 0.4s; }
.product-card:hover .pc-img img { transform: scale(1.05); }
.pc-body { padding: 24px; }
.pc-tag {
  display: inline-block;
  font-size: 11px;
  font-weight: 600;
  color: var(--accent-dark);
  background: rgba(0, 194, 168, 0.1);
  padding: 4px 10px;
  border-radius: 4px;
  margin-bottom: 12px;
  letter-spacing: 0.5px;
}
.pc-body h3 { font-size: 20px; font-weight: 700; color: var(--primary); margin-bottom: 10px; }
.pc-body p { font-size: 14px; color: var(--text-light); line-height: 1.7; margin-bottom: 14px; }
.pc-body ul { list-style: none; margin-bottom: 18px; }
.pc-body ul li { font-size: 13px; color: var(--text-light); padding: 4px 0 4px 20px; position: relative; }
.pc-body ul li::before { content: '▸'; position: absolute; left: 0; color: var(--accent); font-weight: 700; }

/* ============ 内容卡片网格（ESB/ETLV/AI/案例用） ============ */
.content-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 28px;
}
.content-card {
  background: var(--bg-card);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  transition: all 0.3s;
  border: 1px solid var(--border);
  display: flex;
  flex-direction: column;
}
.content-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-md); border-color: rgba(0, 194, 168, 0.3); }
.cc-img {
  height: 220px;
  overflow: hidden;
  position: relative;
  background: var(--gradient-primary);
}
.cc-img img { width: 100%; height: 100%; object-fit: cover; transition: transform 0.4s; }
.content-card:hover .cc-img img { transform: scale(1.05); }
.cc-img.img-fallback, .cc-img-coach.img-fallback, .kc-img.img-fallback {
  display: flex; align-items: center; justify-content: center;
}
.cc-emoji { font-size: 56px; line-height: 1; }
.cc-img-coach .cc-emoji { font-size: 48px; }
.kc-img .cc-emoji { font-size: 64px; }
.cc-num {
  position: absolute;
  top: 16px;
  left: 16px;
  font-size: 14px;
  font-weight: 700;
  color: #fff;
  font-family: var(--font-mono);
  background: rgba(10, 37, 64, 0.7);
  padding: 4px 12px;
  border-radius: 20px;
  backdrop-filter: blur(6px);
}
.cc-body { padding: 24px; flex: 1; display: flex; flex-direction: column; }
.cc-body h3 { font-size: 18px; font-weight: 700; color: var(--primary); margin-bottom: 10px; }
.cc-body p { font-size: 14px; color: var(--text-light); line-height: 1.7; flex: 1; }
.cc-body .cc-tag {
  display: inline-block;
  font-size: 12px;
  color: var(--accent-dark);
  background: rgba(0, 194, 168, 0.08);
  padding: 4px 10px;
  border-radius: 4px;
  margin-top: 12px;
  align-self: flex-start;
}

/* ============ 信息发布卡片（解决方案/协同发布） ============ */
.coach-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}
.coach-card {
  background: var(--bg-card);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  transition: all 0.3s;
  border: 1px solid var(--border);
  display: flex;
  flex-direction: column;
}
.coach-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-md); }
.cc-img-coach {
  height: 180px;
  overflow: hidden;
  position: relative;
  background: var(--gradient-primary);
}
.cc-img-coach img { width: 100%; height: 100%; object-fit: cover; }
.coop-badge {
  position: absolute;
  top: 12px;
  right: 12px;
  background: var(--accent);
  color: #fff;
  font-size: 11px;
  font-weight: 600;
  padding: 4px 10px;
  border-radius: 4px;
  letter-spacing: 0.5px;
  box-shadow: 0 2px 8px rgba(0, 194, 168, 0.4);
}
.cc-body-coach { padding: 20px; flex: 1; display: flex; flex-direction: column; }
.cc-body-coach h3 { font-size: 16px; font-weight: 700; color: var(--primary); margin-bottom: 8px; line-height: 1.4; }
.cc-meta { font-size: 12px; color: var(--accent-dark); font-weight: 500; margin-bottom: 8px; }
.cc-desc { font-size: 13px; color: var(--text-light); line-height: 1.6; flex: 1; margin-bottom: 14px; }
.cc-foot { display: flex; justify-content: space-between; align-items: center; padding-top: 14px; border-top: 1px solid var(--border); }
.cc-price { font-size: 20px; font-weight: 800; color: var(--primary); }
.cc-price small { font-size: 12px; font-weight: 400; color: var(--text-muted); }

/* ============ 案例卡片 ============ */
.case-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 28px;
}
.case-card {
  background: var(--bg-card);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  transition: all 0.3s;
  border: 1px solid var(--border);
}
.case-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-md); }
.kc-img { height: 240px; overflow: hidden; background: var(--gradient-primary); }
.kc-img img { width: 100%; height: 100%; object-fit: cover; transition: transform 0.4s; }
.case-card:hover .kc-img img { transform: scale(1.05); }
.kc-body { padding: 24px; }
.kc-quote { font-size: 15px; color: var(--text); line-height: 1.7; margin-bottom: 14px; font-style: italic; border-left: 3px solid var(--accent); padding-left: 14px; }
.kc-name { font-size: 16px; font-weight: 700; color: var(--primary); margin-bottom: 4px; }
.kc-tag { font-size: 12px; color: var(--accent-dark); font-weight: 500; }

/* ============ 数据统计带 ============ */
.stats-band {
  background: var(--gradient-primary);
  padding: 56px 0;
  color: #fff;
}
.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  text-align: center;
}
.stat-item b { display: block; font-size: 36px; font-weight: 800; color: var(--accent-light); margin-bottom: 6px; }
.stat-item span { font-size: 14px; color: rgba(255, 255, 255, 0.7); }

/* ============ 时间线 ============ */
.timeline { max-width: 800px; margin: 0 auto; position: relative; }
.timeline::before {
  content: '';
  position: absolute;
  left: 100px;
  top: 0;
  bottom: 0;
  width: 2px;
  background: var(--border);
}
.tl-item { position: relative; padding: 0 0 32px 140px; }
.tl-item:last-child { padding-bottom: 0; }
.tl-date {
  position: absolute;
  left: 0;
  top: 0;
  width: 90px;
  text-align: right;
  font-size: 14px;
  font-weight: 700;
  color: var(--accent-dark);
  font-family: var(--font-mono);
}
.tl-item::before {
  content: '';
  position: absolute;
  left: 96px;
  top: 4px;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--accent);
  border: 2px solid #fff;
  box-shadow: 0 0 0 2px var(--accent);
}
.tl-item h4 { font-size: 16px; font-weight: 700; color: var(--primary); margin-bottom: 6px; }
.tl-item p { font-size: 14px; color: var(--text-light); }

/* ============ 价值卡片 ============ */
.value-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}
.value-card {
  background: var(--bg-card);
  border-radius: var(--radius);
  padding: 32px 24px;
  text-align: center;
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--border);
  transition: all 0.3s;
}
.value-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-md); border-color: rgba(0, 194, 168, 0.3); }
.vc-icon { font-size: 36px; margin-bottom: 16px; }
.value-card h4 { font-size: 16px; font-weight: 700; color: var(--primary); margin-bottom: 8px; }
.value-card p { font-size: 13px; color: var(--text-light); }

/* ============ 关于我们 ============ */
.about-lead {
  font-size: 20px;
  font-weight: 600;
  color: var(--primary);
  text-align: center;
  margin-bottom: 20px;
  max-width: 800px;
  margin-left: auto;
  margin-right: auto;
}
.about-para {
  font-size: 15px;
  color: var(--text-light);
  line-height: 1.9;
  max-width: 800px;
  margin: 0 auto;
  text-align: center;
}

/* ============ CTA 带 ============ */
.cta-band {
  background: var(--gradient-accent);
  padding: 56px 0;
  text-align: center;
  color: #fff;
}
.cta-band h2 { font-size: 28px; font-weight: 800; margin-bottom: 14px; }
.cta-band p { font-size: 15px; opacity: 0.9; margin-bottom: 24px; }

/* ============ 页面 Hero ============ */
.page-hero {
  background: var(--gradient-primary);
  color: #fff;
  padding: 56px 0;
}
.page-hero .crumb { font-size: 13px; color: rgba(255,255,255,0.6); margin-bottom: 16px; }
.page-hero .crumb a { color: var(--accent-light); }
.page-hero h1 { font-size: 32px; font-weight: 800; margin-bottom: 10px; }
.page-hero p { font-size: 14px; color: rgba(255,255,255,0.7); }

/* ============ 认证表单 ============ */
.auth-wrap {
  min-height: 70vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 60px 24px;
  background: var(--bg-soft);
}
.auth-card {
  background: #fff;
  border-radius: var(--radius);
  box-shadow: var(--shadow-md);
  padding: 40px;
  max-width: 460px;
  width: 100%;
}
.auth-card h1 { font-size: 26px; font-weight: 800; color: var(--primary); margin-bottom: 8px; }
.auth-sub { font-size: 14px; color: var(--text-light); margin-bottom: 28px; }
.form-item { margin-bottom: 18px; }
.form-item label { display: block; font-size: 13px; font-weight: 600; color: var(--text); margin-bottom: 6px; }
.form-item input {
  width: 100%;
  padding: 12px 14px;
  font-size: 14px;
  border: 1.5px solid var(--border);
  border-radius: var(--radius-sm);
  font-family: var(--font);
  transition: border-color 0.2s;
  background: var(--bg);
}
.form-item input:focus { outline: none; border-color: var(--accent); background: #fff; }
.form-tip { font-size: 12px; color: var(--text-muted); margin-top: 6px; }
.form-tip.beian { color: var(--accent-dark); background: rgba(0, 194, 168, 0.06); padding: 8px 12px; border-radius: 4px; }
.agree-row { display: flex; align-items: flex-start; gap: 8px; margin-bottom: 14px; font-size: 13px; }
.agree-row input[type="checkbox"] { margin-top: 3px; flex-shrink: 0; }
.agree-row label { font-weight: 400; color: var(--text-light); line-height: 1.6; }
.agree-row a { color: var(--accent-dark); font-weight: 500; }
.form-error {
  display: none;
  background: #FFF0F0;
  color: #D32F2F;
  font-size: 13px;
  padding: 10px 14px;
  border-radius: var(--radius-sm);
  margin-bottom: 16px;
  border: 1px solid #FFCDD2;
}
.auth-actions { margin-top: 24px; }
.auth-actions .btn { width: 100%; }
.auth-switch { text-align: center; font-size: 14px; color: var(--text-light); margin-top: 20px; }
.auth-switch a { color: var(--accent-dark); font-weight: 600; }

/* ============ 支付页 ============ */
.pay-wrap {
  min-height: 70vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 60px 24px;
  background: var(--bg-soft);
}
.pay-card {
  background: #fff;
  border-radius: var(--radius);
  box-shadow: var(--shadow-md);
  padding: 40px;
  max-width: 560px;
  width: 100%;
}
.pay-head { text-align: center; margin-bottom: 28px; }
.pay-head h1 { font-size: 24px; font-weight: 800; color: var(--primary); margin-bottom: 8px; }
.pay-head p { font-size: 14px; color: var(--text-light); }
.pay-body { display: flex; flex-direction: column; gap: 24px; }
.pay-order { background: var(--bg-soft); border-radius: var(--radius-sm); padding: 20px; }
.po-row { display: flex; justify-content: space-between; padding: 8px 0; font-size: 14px; border-bottom: 1px dashed var(--border); }
.po-row:last-child { border-bottom: none; }
.po-row span { color: var(--text-light); }
.po-row b { color: var(--text); font-weight: 600; }
.po-total b { color: var(--accent-dark); font-size: 18px; }
.pay-qr-area { text-align: center; }
.scan-tip { font-size: 16px; font-weight: 700; color: var(--primary); margin-bottom: 8px; }
.pay-qr-area p { font-size: 13px; color: var(--text-light); }
.qr-box {
  display: inline-block;
  padding: 16px;
  background: #fff;
  border: 2px solid var(--border);
  border-radius: var(--radius-sm);
  margin: 12px 0;
}
.qr-box img { width: 200px; height: 200px; object-fit: contain; }
.pay-actions { display: flex; justify-content: center; }

/* 支付弹窗 */
.pay-modal-mask {
  position: fixed;
  inset: 0;
  background: rgba(6, 26, 46, 0.6);
  backdrop-filter: blur(6px);
  display: none;
  align-items: center;
  justify-content: center;
  z-index: 200;
  padding: 24px;
}
.pay-modal-mask.show { display: flex; }
.pay-modal {
  background: #fff;
  border-radius: var(--radius);
  padding: 40px;
  max-width: 380px;
  width: 100%;
  text-align: center;
  box-shadow: var(--shadow-lg);
}
.pay-modal h2 { font-size: 20px; font-weight: 700; color: var(--primary); margin-bottom: 16px; }
.pm-amount { font-size: 32px; font-weight: 800; color: var(--accent-dark); margin-bottom: 20px; }
.pm-tip { font-size: 13px; color: var(--text-light); line-height: 1.6; margin-bottom: 20px; }
.pay-modal .btn { width: 100%; }

/* ============ 协议页 ============ */
.agreement-wrap {
  max-width: 860px;
  margin: 0 auto;
  padding: 56px 24px;
}
.agreement-wrap h1 {
  font-size: 28px;
  font-weight: 800;
  color: var(--primary);
  text-align: center;
  margin-bottom: 8px;
}
.agreement-wrap .update-date {
  text-align: center;
  font-size: 13px;
  color: var(--text-muted);
  margin-bottom: 36px;
}
.agreement-wrap h2 {
  font-size: 18px;
  font-weight: 700;
  color: var(--primary);
  margin: 28px 0 12px;
}
.agreement-wrap p {
  font-size: 14px;
  color: var(--text-light);
  line-height: 1.9;
  margin-bottom: 12px;
}
.agreement-wrap ul { margin: 0 0 12px 20px; }
.agreement-wrap li { font-size: 14px; color: var(--text-light); line-height: 1.9; }

/* ============ 页脚 ============ */
.site-footer {
  background: var(--dark);
  color: rgba(255, 255, 255, 0.7);
  padding: 56px 0 24px;
}
.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: 48px;
  margin-bottom: 40px;
}
.footer-brand {
  font-size: 16px;
  font-weight: 700;
  color: #fff;
  margin-bottom: 12px;
  line-height: 1.4;
}
.footer-col p { font-size: 13px; line-height: 1.8; margin-bottom: 6px; }
.footer-col h5 { font-size: 14px; font-weight: 600; color: #fff; margin-bottom: 14px; }
.footer-col a { display: block; font-size: 13px; color: rgba(255,255,255,0.6); padding: 4px 0; }
.footer-col a:hover { color: var(--accent-light); }
.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.1);
  padding-top: 20px;
  text-align: center;
  font-size: 13px;
  color: rgba(255,255,255,0.5);
}
.footer-bottom a { color: rgba(255,255,255,0.5); }
.footer-bottom a:hover { color: var(--accent-light); }

/* ============ 返回官网按钮（商城用） ============ */
.back-to-site {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 16px;
  background: var(--gradient-accent);
  color: #fff;
  font-size: 13px;
  font-weight: 600;
  border-radius: var(--radius-sm);
  text-decoration: none;
  box-shadow: 0 4px 12px rgba(0, 194, 168, 0.3);
  transition: all 0.25s;
}
.back-to-site:hover { transform: translateY(-2px); box-shadow: 0 8px 20px rgba(0, 194, 168, 0.4); color: #fff; }

/* ============ 响应式 ============ */
@media (max-width: 1024px) {
  .hero-inner { grid-template-columns: 1fr; gap: 40px; }
  .product-grid, .coach-grid { grid-template-columns: repeat(2, 1fr); }
  .content-grid, .case-grid { grid-template-columns: 1fr; }
  .value-grid { grid-template-columns: repeat(2, 1fr); }
  .stats-grid { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: 1fr; gap: 32px; }
  .main-nav { display: none; }
}
@media (max-width: 640px) {
  .hero h1 { font-size: 30px; }
  .product-grid, .coach-grid, .value-grid, .stats-grid { grid-template-columns: 1fr; }
  .section { padding: 48px 0; }
  .sec-head h2 { font-size: 24px; }
  .auth-card, .pay-card { padding: 28px 20px; }
  .timeline::before { left: 60px; }
  .tl-item { padding-left: 90px; }
  .tl-date { width: 52px; }
  .tl-item::before { left: 56px; }
}