/* ===================================================
   餐饮AI短视频量产系统·官网 全局样式
   主色：抖音蓝 #2563EB / 暖橙 #FF7D29
   =================================================== */

/* ---------- 基础重置 ---------- */
* { margin: 0; padding: 0; box-sizing: border-box; -webkit-tap-highlight-color: transparent; }
html { scroll-behavior: smooth; font-size: 14px; }
body {
  font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", "Hiragino Sans GB", Arial, sans-serif;
  font-size: 16px;
  line-height: 1.6;
  color: #1F2937;
  background-color: #F9FAFB;
  -webkit-font-smoothing: antialiased;
}
a { text-decoration: none; color: inherit; }
ul, ol { list-style: none; }
img, video { max-width: 100%; display: block; }
button { border: none; outline: none; cursor: pointer; font-family: inherit; }
input, textarea, select { font-family: inherit; outline: none; }

/* ---------- CSS 变量 ---------- */
:root {
  --primary: #2563EB;
  --primary-dark: #1D4ED8;
  --primary-light: #DBEAFE;
  --accent: #FF7D29;
  --accent-dark: #E96A18;
  --accent-light: #FFF1E5;
  --success: #10B981;
  --danger: #EF4444;
  --gray-50: #F9FAFB;
  --gray-100: #F3F4F6;
  --gray-200: #E5E7EB;
  --gray-300: #D1D5DB;
  --gray-500: #6B7280;
  --gray-700: #374151;
  --gray-800: #1F2937;
  --gray-900: #111827;
  --white: #FFFFFF;
  --radius: 8px;
  --radius-lg: 16px;
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.05);
  --shadow: 0 4px 12px rgba(0,0,0,0.08);
  --shadow-lg: 0 10px 30px rgba(0,0,0,0.12);
  --shadow-primary: 0 8px 20px rgba(37,99,235,0.25);
  --shadow-accent: 0 8px 20px rgba(255,125,41,0.3);
  --container: 1200px;
}

/* ---------- 容器 ---------- */
.container { max-width: var(--container); margin: 0 auto; padding: 0 16px; }

/* ---------- 通用按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  padding: 14px 28px;
  font-size: 16px;
  font-weight: 700;
  border-radius: var(--radius);
  transition: all .25s ease;
  white-space: nowrap;
}
.btn-primary { background: var(--primary); color: #fff; box-shadow: var(--shadow-primary); }
.btn-primary:hover { background: var(--primary-dark); transform: translateY(-2px); }
.btn-accent { background: var(--accent); color: #fff; box-shadow: var(--shadow-accent); }
.btn-accent:hover { background: var(--accent-dark); transform: translateY(-2px); }
.btn-outline { background: #fff; color: var(--primary); border: 2px solid var(--primary); }
.btn-outline:hover { background: var(--primary); color: #fff; }
.btn-lg { padding: 18px 36px; font-size: 18px; }
.btn-block { width: 100%; }
.btn-ghost { background: rgba(255,255,255,0.15); color: #fff; border: 1px solid rgba(255,255,255,0.4); }
.btn-ghost:hover { background: rgba(255,255,255,0.25); }

/* ---------- 通用标题 ---------- */
.section { padding: 60px 0; }
.section-title {
  text-align: center;
  margin-bottom: 40px;
}
.section-title h2 {
  font-size: 28px;
  font-weight: 800;
  color: var(--gray-900);
  line-height: 1.2;
  margin-bottom: 12px;
}
.section-title h2 .hl { color: var(--accent); }
.section-title p {
  font-size: 16px;
  color: var(--gray-500);
  line-height: 1.6;
}
.section-tag {
  display: inline-block;
  padding: 4px 12px;
  background: var(--primary-light);
  color: var(--primary);
  font-size: 13px;
  font-weight: 700;
  border-radius: 999px;
  margin-bottom: 12px;
}

/* ---------- 顶部导航 ---------- */
.header {
  position: fixed; top: 0; left: 0; right: 0;
  background: rgba(255,255,255,0.96);
  backdrop-filter: saturate(180%) blur(10px);
  box-shadow: var(--shadow-sm);
  z-index: 100;
  transition: box-shadow .3s;
}
.header.scrolled { box-shadow: var(--shadow); }
.nav {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 16px;
  height: 60px;
  display: flex; align-items: center; justify-content: space-between;
}
.logo {
  display: flex; align-items: center; gap: 8px;
  font-size: 18px; font-weight: 800; color: var(--gray-900);
}
.logo-icon {
  width: 36px; height: 36px;
  border-radius: 8px;
  object-fit: contain;
}
.nav-menu {
  display: flex; align-items: center; gap: 28px;
}
.nav-menu a {
  font-size: 15px; font-weight: 500; color: var(--gray-700);
  position: relative; padding: 6px 0;
  transition: color .2s;
}
.nav-menu a:hover, .nav-menu a.active { color: var(--primary); }
.nav-menu a.active::after {
  content: ''; position: absolute; bottom: -8px; left: 0; right: 0;
  height: 3px; background: var(--primary); border-radius: 2px;
}
.nav-cta { display: flex; align-items: center; gap: 12px; }
.nav-cta .btn { padding: 8px 18px; font-size: 14px; }
.hamburger {
  display: none;
  width: 30px; height: 30px;
  flex-direction: column; justify-content: center; gap: 6px;
  background: transparent;
}
.hamburger span {
  display: block; height: 3px; background: var(--gray-800); border-radius: 2px;
  transition: all .3s;
}
.hamburger.open span:nth-child(1) { transform: translateY(9px) rotate(45deg); }
.hamburger.open span:nth-child(2) { opacity: 0; }
.hamburger.open span:nth-child(3) { transform: translateY(-9px) rotate(-45deg); }

main { padding-top: 60px; }

/* ---------- Hero 首屏 ---------- */
.hero {
  position: relative;
  background: linear-gradient(135deg, #1E40AF 0%, #2563EB 55%, #FF7D29 130%);
  color: #fff;
  padding: 70px 0 80px;
  overflow: hidden;
}
.hero::before {
  content: '';
  position: absolute; inset: 0;
  background-image:
    radial-gradient(circle at 20% 30%, rgba(255,255,255,0.12) 0%, transparent 40%),
    radial-gradient(circle at 80% 70%, rgba(255,125,41,0.25) 0%, transparent 50%);
}
.hero .container { position: relative; z-index: 2; }
.hero-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 36px;
  align-items: center;
}
.hero-tag {
  display: inline-flex; align-items: center; gap: 6px;
  padding: 6px 14px;
  background: rgba(255,255,255,0.16);
  border: 1px solid rgba(255,255,255,0.3);
  border-radius: 999px;
  font-size: 13px; font-weight: 600;
  margin-bottom: 16px;
}
.hero-tag .dot {
  width: 6px; height: 6px; background: #10B981; border-radius: 50%;
  box-shadow: 0 0 8px #10B981;
}
.hero h1 {
  font-size: 32px;
  font-weight: 900;
  line-height: 1.2;
  margin-bottom: 16px;
}
.hero h1 .accent { color: #FFD580; }
.hero-sub {
  font-size: 16px;
  line-height: 1.7;
  opacity: 0.95;
  margin-bottom: 24px;
}
.hero-points {
  display: grid; gap: 10px;
  margin-bottom: 28px;
}
.hero-points li {
  display: flex; align-items: center; gap: 8px;
  font-size: 15px;
}
.hero-points .check {
  width: 22px; height: 22px; border-radius: 50%;
  background: var(--accent);
  display: inline-flex; align-items: center; justify-content: center;
  font-size: 13px; font-weight: 800;
}
.hero-cta { display: flex; flex-wrap: wrap; gap: 12px; margin-bottom: 24px; }
.hero-stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
  padding-top: 22px;
  border-top: 1px solid rgba(255,255,255,0.2);
}
.hero-stats .item .num {
  font-size: 24px; font-weight: 900; color: #FFD580;
  display: flex; align-items: baseline; gap: 2px;
}
.hero-stats .item .num small { font-size: 13px; opacity: 0.9; }
.hero-stats .item .label { font-size: 12px; opacity: 0.85; }

/* Hero 右侧手机演示 */
.hero-visual {
  position: relative;
}
.hero-phone {
  position: relative;
  margin: 0 auto;
  width: 240px;
  height: 480px;
  border-radius: 36px;
  background: #0f172a;
  padding: 10px;
  box-shadow: 0 30px 60px rgba(0,0,0,0.4), inset 0 0 0 2px rgba(255,255,255,0.1);
}
.hero-phone::before {
  content: '';
  position: absolute;
  top: 14px; left: 50%; transform: translateX(-50%);
  width: 90px; height: 22px;
  background: #000; border-radius: 14px; z-index: 3;
}
.phone-screen {
  width: 100%; height: 100%;
  background: linear-gradient(180deg, #FF7D29 0%, #ef4444 100%);
  border-radius: 28px;
  overflow: hidden;
  position: relative;
}
.phone-video {
  position: absolute; inset: 0;
  display: flex; flex-direction: column; justify-content: space-between;
  color: #fff;
}
.hero-video {
  position: absolute; inset: 0;
  width: 100%; height: 100%;
  object-fit: cover;
}
.phone-overlay {
  position: relative; z-index: 2;
  display: flex; flex-direction: column; justify-content: space-between;
  height: 100%;
  padding: 50px 14px 18px;
  background: linear-gradient(180deg, rgba(0,0,0,0.1), rgba(0,0,0,0.65));
}
.phone-title { font-size: 14px; font-weight: 800; margin-bottom: 6px; line-height: 1.3; }
.phone-desc { font-size: 12px; opacity: 0.9; line-height: 1.5; }
.phone-bottom { display: flex; align-items: center; justify-content: space-between; }
.phone-poi {
  display: inline-flex; align-items: center; gap: 4px;
  background: rgba(0,0,0,0.5); padding: 4px 8px; border-radius: 4px;
  font-size: 11px;
}
.phone-actions { display: flex; flex-direction: column; gap: 14px; align-items: center; font-size: 11px; }
.phone-actions .ico {
  width: 36px; height: 36px; background: rgba(0,0,0,0.4); border-radius: 50%;
  display: flex; align-items: center; justify-content: center; font-size: 16px;
}
.phone-floats {
  position: absolute;
  top: 60px;
  left: -20px;
  z-index: 20;
  pointer-events: none;
}
.float-card {
  position: absolute;
  background: #fff; color: var(--gray-800);
  padding: 10px 16px; border-radius: 10px;
  box-shadow: 0 6px 20px rgba(0,0,0,0.18);
  font-size: 13px; font-weight: 600;
  display: flex; align-items: center; gap: 8px;
  white-space: nowrap;
  animation: float 3s ease-in-out infinite;
  pointer-events: auto;
}
.float-card .em { color: var(--accent); font-weight: 800; }
.float-card.f1 { top: 20px; left: 0; }
.float-card.f2 { top: 110px; left: 10px; animation-delay: 0.6s; }
.float-card.f3 { top: 200px; left: -10px; animation-delay: 1.2s; }
@keyframes float {
  0%,100% { transform: translateY(0); }
  50% { transform: translateY(-6px); }
}

/* ---------- 痛点 4 大问题 ---------- */
.pain {
  background: #fff;
}
.pain-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
}
.pain-card {
  padding: 24px 20px;
  background: var(--gray-50);
  border: 1px solid var(--gray-200);
  border-radius: var(--radius-lg);
  position: relative;
  transition: all .3s;
}
.pain-card:hover { transform: translateY(-4px); box-shadow: var(--shadow); border-color: var(--accent); }
.pain-card .icon {
  width: 48px; height: 48px;
  background: var(--accent-light);
  border-radius: 12px;
  display: flex; align-items: center; justify-content: center;
  font-size: 26px; margin-bottom: 16px;
}
.pain-card h3 { font-size: 18px; font-weight: 800; color: var(--gray-900); margin-bottom: 8px; }
.pain-card p { font-size: 14px; color: var(--gray-500); line-height: 1.7; }
.pain-card .tag {
  position: absolute; top: 20px; right: 20px;
  font-size: 12px; color: var(--danger); font-weight: 700;
  background: #FEE2E2; padding: 2px 8px; border-radius: 4px;
}

/* ---------- 解决方案流程 ---------- */
.solution { background: var(--gray-50); }
.solution-intro {
  background: #fff; padding: 24px 20px; border-radius: var(--radius-lg);
  text-align: center; margin-bottom: 30px;
  box-shadow: var(--shadow-sm);
}
.solution-intro .label {
  display: inline-block; padding: 4px 14px; background: var(--accent); color: #fff;
  font-size: 13px; font-weight: 700; border-radius: 999px; margin-bottom: 12px;
}
.solution-intro h3 {
  font-size: 22px; font-weight: 900; color: var(--gray-900); line-height: 1.3;
}
.solution-intro h3 .em { color: var(--accent); }
.solution-flow {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
}
.flow-step {
  background: #fff; padding: 20px;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  display: flex; gap: 14px;
  border-left: 4px solid var(--primary);
}
.flow-step.user { border-left-color: var(--accent); background: linear-gradient(90deg, var(--accent-light), #fff); }
.flow-step .step-num {
  flex-shrink: 0;
  width: 44px; height: 44px;
  background: var(--primary); color: #fff;
  border-radius: 12px;
  display: flex; align-items: center; justify-content: center;
  font-size: 20px; font-weight: 900;
}
.flow-step.user .step-num { background: var(--accent); }
.flow-step h4 { font-size: 16px; font-weight: 800; margin-bottom: 6px; color: var(--gray-900); }
.flow-step p { font-size: 14px; color: var(--gray-500); line-height: 1.6; }
.flow-step .role {
  display: inline-block; font-size: 11px; font-weight: 700;
  padding: 2px 8px; border-radius: 4px; margin-bottom: 6px;
  background: var(--primary-light); color: var(--primary);
}
.flow-step.user .role { background: var(--accent-light); color: var(--accent); }

/* ---------- 五大核心优势 ---------- */
.advantages { background: #fff; }
.advantage-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
}
.adv-card {
  padding: 24px;
  background: var(--gray-50);
  border-radius: var(--radius-lg);
  border: 1px solid var(--gray-200);
  position: relative;
  overflow: hidden;
  transition: all .3s;
}
.adv-card:hover { transform: translateY(-4px); box-shadow: var(--shadow); }
.adv-card::before {
  content: '';
  position: absolute; top: 0; left: 0; right: 0; height: 4px;
  background: linear-gradient(90deg, var(--primary), var(--accent));
}
.adv-card .head {
  display: flex; align-items: center; gap: 14px; margin-bottom: 14px;
}
.adv-card .num {
  width: 48px; height: 48px;
  background: linear-gradient(135deg, var(--primary), #1E40AF);
  color: #fff;
  border-radius: 12px;
  display: flex; align-items: center; justify-content: center;
  font-size: 20px; font-weight: 900;
}
.adv-card h3 { font-size: 18px; font-weight: 800; color: var(--gray-900); flex: 1; line-height: 1.3; }
.adv-card .body p { font-size: 14px; color: var(--gray-500); line-height: 1.7; margin-bottom: 8px; }
.adv-card .body .em { color: var(--accent); font-weight: 700; }
.adv-card .vs {
  background: #fff; padding: 12px 14px; border-radius: 8px;
  margin-top: 12px; font-size: 13px;
}
.adv-card .vs .bad { color: var(--gray-500); margin-bottom: 4px; }
.adv-card .vs .bad::before { content: '✗ '; color: var(--danger); font-weight: 800; }
.adv-card .vs .good { color: var(--gray-900); font-weight: 600; }
.adv-card .vs .good::before { content: '✓ '; color: var(--success); font-weight: 800; }

/* ---------- 实测数据 ---------- */
.data-block {
  background: linear-gradient(135deg, #111827 0%, #1E3A8A 100%);
  color: #fff;
  padding: 60px 0;
  position: relative;
  overflow: hidden;
}
.data-block::before {
  content: '';
  position: absolute; inset: 0;
  background-image: radial-gradient(circle at 80% 50%, rgba(255,125,41,0.2) 0%, transparent 50%);
}
.data-block .container { position: relative; z-index: 2; }
.data-block .section-title h2 { color: #fff; }
.data-block .section-title p { color: rgba(255,255,255,0.7); }
.data-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
}
.data-card {
  background: rgba(255,255,255,0.08);
  border: 1px solid rgba(255,255,255,0.15);
  backdrop-filter: blur(10px);
  padding: 24px 18px;
  border-radius: var(--radius-lg);
  text-align: center;
}
.data-card .v {
  font-size: 32px;
  font-weight: 900;
  color: var(--accent);
  line-height: 1;
  margin-bottom: 8px;
  display: flex; align-items: baseline; justify-content: center; gap: 4px;
}
.data-card .v small { font-size: 16px; color: #fff; }
.data-card .label { font-size: 14px; opacity: 0.85; line-height: 1.4; }

/* ---------- 案例展示 ---------- */
.cases { background: var(--gray-50); }
.case-tabs {
  display: flex; flex-wrap: wrap; gap: 8px; justify-content: center;
  margin-bottom: 24px;
}
.case-tab {
  padding: 8px 18px;
  background: #fff; border: 1px solid var(--gray-200);
  border-radius: 999px; font-size: 14px; font-weight: 600;
  color: var(--gray-700); cursor: pointer;
  transition: all .2s;
}
.case-tab.active, .case-tab:hover {
  background: var(--primary); color: #fff; border-color: var(--primary);
}
.case-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 14px;
}
.case-card {
  background: #fff;
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  transition: all .3s;
  cursor: pointer;
}
.case-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); }
.case-video {
  position: relative;
  width: 100%;
  aspect-ratio: 9 / 16;
  background: linear-gradient(180deg, #1f2937, #000);
  overflow: hidden;
}
.case-video .thumb {
  position: absolute; inset: 0;
  display: flex; align-items: flex-end; padding: 12px;
  color: #fff;
  background-position: center;
  background-size: cover;
}
.case-video .play-btn {
  position: absolute; top: 50%; left: 50%; transform: translate(-50%,-50%);
  width: 48px; height: 48px; border-radius: 50%;
  background: rgba(255,255,255,0.85);
  display: flex; align-items: center; justify-content: center;
  font-size: 18px; color: var(--gray-900);
}
.case-video .badge {
  position: absolute; top: 8px; left: 8px;
  background: var(--accent); color: #fff;
  padding: 3px 8px; font-size: 11px; font-weight: 700; border-radius: 4px;
}
.case-video .views {
  position: absolute; bottom: 8px; left: 8px;
  background: rgba(0,0,0,0.6); color: #fff;
  padding: 3px 8px; font-size: 11px; border-radius: 4px;
}
.case-info { padding: 14px; }
.case-info h4 { font-size: 14px; font-weight: 700; margin-bottom: 6px; color: var(--gray-900); line-height: 1.3; }
.case-info .meta { font-size: 12px; color: var(--gray-500); margin-bottom: 8px; }
.case-info .data-row {
  display: flex; gap: 10px; padding-top: 8px; border-top: 1px dashed var(--gray-200);
}
.case-info .data-row .d {
  flex: 1; text-align: center;
}
.case-info .data-row .d .v { font-size: 14px; font-weight: 800; color: var(--accent); }
.case-info .data-row .d .l { font-size: 11px; color: var(--gray-500); }

/* 各案例缩略图渐变（占位） */
.bg-hotpot { background: linear-gradient(180deg, rgba(0,0,0,0.2), rgba(0,0,0,0.85)), linear-gradient(135deg, #DC2626 0%, #7C2D12 100%); }
.bg-bbq    { background: linear-gradient(180deg, rgba(0,0,0,0.2), rgba(0,0,0,0.85)), linear-gradient(135deg, #B45309 0%, #1F2937 100%); }
.bg-tea    { background: linear-gradient(180deg, rgba(0,0,0,0.2), rgba(0,0,0,0.85)), linear-gradient(135deg, #BE185D 0%, #6B21A8 100%); }
.bg-china  { background: linear-gradient(180deg, rgba(0,0,0,0.2), rgba(0,0,0,0.85)), linear-gradient(135deg, #92400E 0%, #166534 100%); }
.bg-snack  { background: linear-gradient(180deg, rgba(0,0,0,0.2), rgba(0,0,0,0.85)), linear-gradient(135deg, #B45309 0%, #DC2626 100%); }
.bg-noodle { background: linear-gradient(180deg, rgba(0,0,0,0.2), rgba(0,0,0,0.85)), linear-gradient(135deg, #D97706 0%, #4C1D95 100%); }

/* ---------- 价格套餐 ---------- */
.pricing { background: #fff; }
.pricing-switch {
  display: inline-flex; padding: 4px;
  background: var(--gray-100);
  border-radius: 999px;
  margin-bottom: 30px;
}
.pricing-switch button {
  padding: 8px 20px;
  border-radius: 999px;
  font-size: 14px; font-weight: 600;
  color: var(--gray-500);
  background: transparent;
  transition: all .2s;
}
.pricing-switch button.on { background: var(--primary); color: #fff; }
.pricing-switch-wrap { text-align: center; }
.pricing-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 20px;
}
.price-card {
  background: #fff;
  padding: 28px 24px;
  border-radius: var(--radius-lg);
  border: 2px solid var(--gray-200);
  position: relative;
  transition: all .3s;
}
.price-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); }
.price-card.featured {
  border-color: var(--accent);
  box-shadow: var(--shadow-accent);
  transform: scale(1.02);
}
.price-card.featured::before {
  content: '🔥 最受欢迎';
  position: absolute; top: -14px; left: 50%; transform: translateX(-50%);
  background: var(--accent); color: #fff;
  padding: 4px 14px; font-size: 12px; font-weight: 700;
  border-radius: 999px; white-space: nowrap;
}
.price-card .name { font-size: 18px; font-weight: 800; color: var(--gray-900); margin-bottom: 6px; }
.price-card .desc { font-size: 13px; color: var(--gray-500); margin-bottom: 16px; }
.price-card .price {
  display: flex; align-items: baseline; gap: 4px; margin-bottom: 16px;
}
.price-card .price .currency { font-size: 18px; color: var(--gray-700); }
.price-card .price .number { font-size: 38px; font-weight: 900; color: var(--gray-900); line-height: 1; }
.price-card .price .unit { font-size: 14px; color: var(--gray-500); }
.price-card .original {
  font-size: 13px; color: var(--gray-500); text-decoration: line-through; margin-bottom: 16px;
}
.price-card ul { display: grid; gap: 10px; margin-bottom: 22px; }
.price-card li {
  display: flex; align-items: flex-start; gap: 8px;
  font-size: 14px; color: var(--gray-700); line-height: 1.5;
}
.price-card li::before {
  content: '✓'; color: var(--success); font-weight: 800; flex-shrink: 0;
}
.price-card li .em { color: var(--accent); font-weight: 700; }
.price-card .btn { width: 100%; }
.pricing-note {
  text-align: center;
  margin-top: 24px;
  font-size: 13px;
  color: var(--gray-500);
}
.pricing-note .em { color: var(--accent); font-weight: 700; }

/* 免费试用横幅 */
.free-trial-banner {
  margin-top: 30px;
  background: linear-gradient(135deg, var(--accent), #DC2626);
  color: #fff;
  padding: 24px;
  border-radius: var(--radius-lg);
  text-align: center;
}
.free-trial-banner h3 { font-size: 20px; font-weight: 900; margin-bottom: 8px; }
.free-trial-banner p { opacity: 0.95; margin-bottom: 16px; font-size: 14px; }

/* ---------- 客户口碑 ---------- */
.testimonials { background: var(--gray-50); }
.test-grid {
  display: grid; grid-template-columns: 1fr; gap: 16px;
}
.test-card {
  background: #fff; padding: 22px;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  position: relative;
}
.test-card::before {
  content: '"';
  position: absolute; top: 8px; right: 18px;
  font-size: 60px; font-family: Georgia, serif; color: var(--primary-light);
  line-height: 1;
}
.test-card .quote { font-size: 14px; line-height: 1.7; color: var(--gray-700); margin-bottom: 16px; }
.test-card .quote .em { color: var(--accent); font-weight: 700; background: var(--accent-light); padding: 1px 6px; border-radius: 3px; }
.test-card .meta { display: flex; align-items: center; gap: 12px; }
.test-card .avatar {
  width: 44px; height: 44px; border-radius: 50%;
  background: linear-gradient(135deg, var(--primary), var(--accent));
  display: flex; align-items: center; justify-content: center;
  color: #fff; font-size: 16px; font-weight: 800;
}
.avatar-img {
  width: 44px; height: 44px; border-radius: 50%;
  object-fit: cover; flex-shrink: 0;
}
.test-card .info .name { font-size: 14px; font-weight: 700; color: var(--gray-900); }
.test-card .info .role { font-size: 12px; color: var(--gray-500); }
.test-card .stars { color: #FFB400; margin-bottom: 8px; font-size: 14px; }

/* ---------- FAQ ---------- */
.faq { background: #fff; }
.faq-list {
  max-width: 800px; margin: 0 auto;
  display: grid; gap: 12px;
}
.faq-item {
  background: var(--gray-50);
  border: 1px solid var(--gray-200);
  border-radius: var(--radius);
  overflow: hidden;
  transition: all .2s;
}
.faq-item.open { border-color: var(--primary); background: #fff; box-shadow: var(--shadow-sm); }
.faq-q {
  display: flex; align-items: center; justify-content: space-between; gap: 12px;
  padding: 18px 20px; cursor: pointer;
  font-size: 15px; font-weight: 700; color: var(--gray-900);
}
.faq-q::after {
  content: '+'; font-size: 24px; color: var(--primary); transition: transform .3s;
  font-weight: 300;
}
.faq-item.open .faq-q::after { transform: rotate(45deg); }
.faq-a {
  max-height: 0; overflow: hidden; transition: max-height .3s ease;
  font-size: 14px; color: var(--gray-700); line-height: 1.7;
}
.faq-item.open .faq-a { max-height: 500px; padding: 0 20px 18px; }

/* ---------- 底部 CTA ---------- */
.cta-bottom {
  background: linear-gradient(135deg, var(--primary) 0%, var(--accent) 100%);
  color: #fff;
  padding: 60px 0;
  text-align: center;
}
.cta-bottom h2 { font-size: 26px; font-weight: 900; line-height: 1.3; margin-bottom: 12px; }
.cta-bottom p { font-size: 15px; opacity: 0.95; margin-bottom: 24px; }
.cta-bottom .btn-group { display: flex; flex-wrap: wrap; gap: 12px; justify-content: center; }

/* ---------- 页脚 ---------- */
.footer {
  background: var(--gray-900); color: #9CA3AF;
  padding: 50px 0 24px;
}
.footer-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 30px;
  margin-bottom: 30px;
}
.footer-col .logo { color: #fff; margin-bottom: 14px; }
.footer-col h4 { font-size: 15px; font-weight: 700; color: #fff; margin-bottom: 14px; }
.footer-col p { font-size: 13px; line-height: 1.7; margin-bottom: 8px; }
.footer-col ul { display: grid; gap: 8px; }
.footer-col a { font-size: 13px; color: #9CA3AF; transition: color .2s; }
.footer-col a:hover { color: #fff; }
.footer-qr {
  display: flex; gap: 14px; margin-top: 12px;
}
.footer-qr .qr {
  text-align: center;
}
.footer-qr .qr-img {
  width: 90px; height: 90px;
  background: #fff; border-radius: 8px;
  display: flex; align-items: center; justify-content: center;
  color: var(--gray-500); font-size: 11px;
  background-image:
    repeating-linear-gradient(0deg, #000 0 2px, transparent 2px 6px),
    repeating-linear-gradient(90deg, #000 0 2px, transparent 2px 6px);
  background-size: 8px 8px;
  margin-bottom: 6px;
}
.footer-qr .qr p { font-size: 12px; }
.footer-bot {
  border-top: 1px solid #374151;
  padding-top: 20px;
  font-size: 12px;
  text-align: center;
  line-height: 1.8;
}

/* ---------- 浮动咨询按钮 ---------- */
.float-ctas {
  position: fixed; right: 14px; bottom: 80px;
  z-index: 50;
  display: flex; flex-direction: column; gap: 10px;
}
.float-cta {
  width: 52px; height: 52px;
  border-radius: 50%;
  background: var(--primary);
  color: #fff;
  display: flex; flex-direction: column; align-items: center; justify-content: center;
  box-shadow: var(--shadow-lg);
  cursor: pointer;
  transition: all .2s;
  font-size: 10px; font-weight: 600;
  gap: 1px;
}
.float-cta:hover { transform: scale(1.05); }
.float-cta .ico { font-size: 18px; }
.float-cta.accent { background: var(--accent); }

/* 底部移动端固定 CTA 栏 */
.mobile-cta-bar {
  position: fixed; bottom: 0; left: 0; right: 0;
  z-index: 50;
  display: none;
  background: #fff;
  box-shadow: 0 -4px 12px rgba(0,0,0,0.08);
  padding: 10px 14px;
  gap: 10px;
}
.mobile-cta-bar .btn { flex: 1; padding: 12px; font-size: 14px; }

/* ---------- 弹窗 ---------- */
.modal-mask {
  position: fixed; inset: 0;
  background: rgba(0,0,0,0.6);
  z-index: 200;
  display: none;
  align-items: center; justify-content: center;
  padding: 20px;
}
.modal-mask.show { display: flex; animation: fadeIn .25s; }
@keyframes fadeIn { from { opacity: 0; } to { opacity: 1; } }
.modal {
  background: #fff;
  border-radius: var(--radius-lg);
  max-width: 480px; width: 100%;
  position: relative;
  animation: slideUp .3s;
}
@keyframes slideUp { from { transform: translateY(20px); opacity: 0; } to { transform: translateY(0); opacity: 1; } }
.modal-header {
  background: linear-gradient(135deg, var(--primary), var(--accent));
  color: #fff;
  padding: 16px 24px 14px;
  border-radius: var(--radius-lg) var(--radius-lg) 0 0;
  position: relative;
}
.modal-header h3 { font-size: 18px; font-weight: 900; margin-bottom: 2px; }
.modal-header p { font-size: 12px; opacity: 0.95; }
.modal-close {
  position: absolute; top: 14px; right: 14px;
  width: 32px; height: 32px; border-radius: 50%;
  background: rgba(255,255,255,0.2); color: #fff;
  display: flex; align-items: center; justify-content: center;
  font-size: 18px; cursor: pointer;
}
.modal-body { padding: 20px 24px; }
.form-group { margin-bottom: 12px; }
.form-group label {
  display: block; font-size: 13px; font-weight: 600; color: var(--gray-700);
  margin-bottom: 4px;
}
.form-group label .req { color: var(--danger); }
.form-input, .form-select, .form-textarea {
  width: 100%;
  padding: 10px 12px;
  border: 1.5px solid var(--gray-200);
  border-radius: var(--radius);
  font-size: 14px;
  transition: border-color .2s;
  background: #fff;
}
.form-input:focus, .form-select:focus, .form-textarea:focus { border-color: var(--primary); }
.form-textarea { min-height: 100px; resize: vertical; }
.form-error { font-size: 12px; color: var(--danger); margin-top: 4px; display: none; }
.form-error.show { display: block; }
.char-count { font-size: 12px; color: var(--gray-400); text-align: right; margin-top: 4px; }
.char-count .char-used { font-weight: 600; }
.form-success {
  text-align: center; padding: 30px 20px;
}
.form-success .ico {
  width: 64px; height: 64px; border-radius: 50%;
  background: var(--success); color: #fff;
  display: flex; align-items: center; justify-content: center;
  font-size: 32px; margin: 0 auto 16px;
}
.form-success h3 { font-size: 20px; font-weight: 800; color: var(--gray-900); margin-bottom: 8px; }
.form-success p { color: var(--gray-500); font-size: 14px; }

/* ---------- 移动端 菜单 ---------- */
.mobile-menu {
  position: fixed; top: 60px; right: 0;
  width: 75%; max-width: 300px;
  height: calc(100vh - 60px);
  background: #fff;
  box-shadow: -4px 0 16px rgba(0,0,0,0.1);
  z-index: 99;
  transform: translateX(100%);
  transition: transform .3s;
  overflow-y: auto;
  padding: 20px 0;
}
.mobile-menu.open { transform: translateX(0); }
.mobile-menu a {
  display: block;
  padding: 14px 24px;
  font-size: 15px; font-weight: 500; color: var(--gray-700);
  border-bottom: 1px solid var(--gray-100);
}
.mobile-menu a.active { color: var(--primary); font-weight: 700; }
.mobile-menu .menu-cta {
  padding: 20px 24px;
  display: flex; flex-direction: column; gap: 10px;
}

/* ---------- 视口淡入 ---------- */
.fade-in { opacity: 0; transform: translateY(20px); transition: opacity .6s ease, transform .6s ease; }
.fade-in.visible { opacity: 1; transform: translateY(0); }

/* ---------- 连锁品牌网格（PC 6×2，平板 4×3，移动 3×4） ---------- */
.brand-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 10px;
}
.brand-card {
  background: #fff;
  padding: 18px 14px;
  border-radius: 12px;
  text-align: center;
  border: 1px solid var(--gray-200);
  transition: all 0.25s;
}
.brand-card:hover { transform: translateY(-3px); box-shadow: var(--shadow); border-color: var(--primary); }
.brand-card .ic { font-size: 24px; margin-bottom: 6px; }
.brand-card h4 { font-size: 14px; font-weight: 700; color: var(--gray-800); margin-bottom: 2px; }
.brand-card p { font-size: 12px; color: var(--gray-500); }
@media (min-width: 768px) {
  .brand-grid { grid-template-columns: repeat(4, 1fr); gap: 14px; }
  .brand-card { padding: 20px; }
  .brand-card .ic { font-size: 28px; }
  .brand-card h4 { font-size: 14px; }
}
@media (min-width: 1024px) {
  .brand-grid { grid-template-columns: repeat(6, 1fr); gap: 16px; }
  .brand-card .ic { font-size: 30px; margin-bottom: 8px; }
}

/* ---------- 12 行业网格（PC 6×2，平板 4×3，移动 3×4） ---------- */
.industry-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 10px;
}
.industry-grid .help-card { padding: 16px 10px; }
.industry-grid .help-card .ic { width: 44px; height: 44px; font-size: 22px; margin-bottom: 10px; }
.industry-grid .help-card h4 { font-size: 14px; }
.industry-grid .help-card p { font-size: 11px; line-height: 1.4; }
@media (min-width: 768px) {
  .industry-grid { grid-template-columns: repeat(4, 1fr); gap: 14px; }
  .industry-grid .help-card { padding: 20px 14px; }
  .industry-grid .help-card h4 { font-size: 15px; }
  .industry-grid .help-card p { font-size: 12px; }
}
@media (min-width: 1024px) {
  .industry-grid { grid-template-columns: repeat(6, 1fr); gap: 16px; }
}

/* ===================================================
   功能页 / 案例页 / 解决方案页 / 帮助中心 共用样式
   =================================================== */
.page-hero {
  background: linear-gradient(135deg, #1E40AF 0%, #2563EB 100%);
  color: #fff;
  padding: 60px 0;
  text-align: center;
}
.page-hero .section-tag {
  background: rgba(255,255,255,0.15);
  color: #fff;
}
.page-hero h1 {
  font-size: 30px; font-weight: 900; margin-bottom: 12px;
}
.page-hero p { font-size: 15px; opacity: 0.95; max-width: 700px; margin: 0 auto; line-height: 1.7; }

/* 功能模块卡片 */
.feature-list {
  display: grid; grid-template-columns: 1fr; gap: 20px;
}
.feature-row {
  background: #fff;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  overflow: hidden;
  display: grid;
  grid-template-columns: 1fr;
}
.feature-row .feature-text {
  padding: 24px;
}
.feature-row .feature-tag {
  display: inline-block;
  font-size: 12px; font-weight: 700;
  padding: 3px 10px; border-radius: 4px;
  background: var(--accent-light); color: var(--accent);
  margin-bottom: 10px;
}
.feature-row h3 { font-size: 20px; font-weight: 800; color: var(--gray-900); margin-bottom: 10px; line-height: 1.3; }
.feature-row p { font-size: 14px; color: var(--gray-700); line-height: 1.7; margin-bottom: 14px; }
.feature-row ul li {
  display: flex; align-items: flex-start; gap: 8px;
  font-size: 14px; color: var(--gray-700); margin-bottom: 6px; line-height: 1.5;
}
.feature-row ul li::before { content: '●'; color: var(--primary); flex-shrink: 0; }
.feature-row .feature-visual {
  background: linear-gradient(135deg, var(--gray-100), #fff);
  display: flex; align-items: center; justify-content: center;
  padding: 30px 20px;
  min-height: 200px;
}
.visual-mock {
  width: 100%; max-width: 280px;
  background: #fff; border-radius: var(--radius);
  box-shadow: var(--shadow);
  overflow: hidden;
}
.visual-mock .head {
  background: var(--primary); color: #fff;
  padding: 10px 14px; font-size: 13px; font-weight: 700;
  display: flex; align-items: center; gap: 8px;
}
.visual-mock .head .dot { width: 8px; height: 8px; border-radius: 50%; background: #10B981; }
.visual-mock .body { padding: 14px; font-size: 13px; }
.visual-mock .item {
  display: flex; align-items: center; gap: 8px;
  padding: 8px 10px; background: var(--gray-50); border-radius: 6px;
  margin-bottom: 8px;
}
.visual-mock .item .ic { color: var(--primary); }
.visual-mock .item .lbl { flex: 1; color: var(--gray-700); }
.visual-mock .item .v { color: var(--accent); font-weight: 700; }
.visual-mock .progress {
  height: 6px; background: var(--gray-100); border-radius: 3px; overflow: hidden;
  margin: 6px 0 10px;
}
.visual-mock .progress .bar {
  height: 100%; background: linear-gradient(90deg, var(--primary), var(--accent));
  border-radius: 3px;
}

/* 标杆门店 */
.benchmark-list { display: grid; gap: 20px; grid-template-columns: 1fr; }
.benchmark-card {
  background: #fff;
  border-radius: var(--radius-lg);
  padding: 22px;
  box-shadow: var(--shadow-sm);
  border-left: 4px solid var(--accent);
}
.benchmark-card .store {
  display: flex; align-items: center; gap: 12px; margin-bottom: 14px;
}
.benchmark-card .store .ic {
  width: 48px; height: 48px; border-radius: 12px;
  background: var(--accent-light); color: var(--accent);
  display: flex; align-items: center; justify-content: center;
  font-size: 22px;
}
.benchmark-card h3 { font-size: 17px; font-weight: 800; color: var(--gray-900); }
.benchmark-card .loc { font-size: 12px; color: var(--gray-500); }
.benchmark-card .label { font-size: 13px; color: var(--gray-500); margin-bottom: 4px; }
.benchmark-card .before-after {
  display: grid; grid-template-columns: 1fr 1fr; gap: 10px;
  background: var(--gray-50); padding: 14px; border-radius: 8px; margin-top: 14px;
}
.benchmark-card .ba .l { font-size: 12px; color: var(--gray-500); }
.benchmark-card .ba .v { font-size: 18px; font-weight: 900; }
.benchmark-card .ba.before .v { color: var(--gray-500); text-decoration: line-through; }
.benchmark-card .ba.after .v { color: var(--accent); }

/* 解决方案对比 */
.solution-tabs {
  background: #fff; border-radius: var(--radius-lg); overflow: hidden;
  box-shadow: var(--shadow-sm);
}
.solution-tab-heads {
  display: grid; grid-template-columns: 1fr 1fr;
}
.solution-tab-heads .th {
  padding: 16px;
  text-align: center;
  font-weight: 700; font-size: 15px;
  background: var(--gray-100); color: var(--gray-700);
  cursor: pointer;
  transition: all .2s;
}
.solution-tab-heads .th.on { background: var(--primary); color: #fff; }
.solution-pane { display: none; padding: 24px; }
.solution-pane.on { display: block; }
.solution-pane h3 { font-size: 18px; font-weight: 800; color: var(--gray-900); margin-bottom: 12px; }
.solution-pane > p { font-size: 14px; color: var(--gray-700); line-height: 1.7; margin-bottom: 16px; }
.solution-feature-grid {
  display: grid; gap: 12px; grid-template-columns: 1fr;
  margin-bottom: 20px;
}
.solution-feature-grid .sf {
  background: var(--gray-50); padding: 14px;
  border-radius: 8px; border-left: 3px solid var(--primary);
}
.solution-feature-grid .sf h4 { font-size: 14px; font-weight: 700; margin-bottom: 4px; }
.solution-feature-grid .sf p { font-size: 13px; color: var(--gray-500); line-height: 1.5; }

/* 帮助中心 */
.help-grid {
  display: grid; gap: 16px; grid-template-columns: 1fr 1fr;
  margin-bottom: 30px;
}
.help-card {
  background: #fff; border: 1px solid var(--gray-200);
  border-radius: var(--radius-lg);
  padding: 20px;
  text-align: center;
  cursor: pointer;
  transition: all .3s;
}
.help-card:hover {
  transform: translateY(-4px);
  border-color: var(--primary);
  box-shadow: var(--shadow);
}
.help-card .ic {
  width: 50px; height: 50px;
  background: var(--primary-light); color: var(--primary);
  border-radius: 12px;
  display: flex; align-items: center; justify-content: center;
  font-size: 24px; margin: 0 auto 12px;
}
.help-card h4 { font-size: 15px; font-weight: 700; margin-bottom: 4px; }
.help-card p { font-size: 12px; color: var(--gray-500); }

.help-tutorials {
  display: grid; gap: 14px; grid-template-columns: 1fr;
}
.tutorial-card {
  background: #fff; padding: 16px;
  border-radius: var(--radius);
  border: 1px solid var(--gray-200);
  display: flex; gap: 14px;
  align-items: center;
}
.tutorial-card .ic {
  flex-shrink: 0;
  width: 60px; height: 60px;
  background: linear-gradient(135deg, var(--primary), var(--accent));
  color: #fff; border-radius: 12px;
  display: flex; align-items: center; justify-content: center;
  font-size: 24px;
}
.tutorial-card h4 { font-size: 15px; font-weight: 700; margin-bottom: 4px; }
.tutorial-card p { font-size: 13px; color: var(--gray-500); }

/* 关于我们 */
.about-intro {
  background: #fff; padding: 30px 24px;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  margin-bottom: 30px;
}
.about-intro h3 { font-size: 22px; font-weight: 900; color: var(--gray-900); margin-bottom: 16px; line-height: 1.3; }
.about-intro p { font-size: 15px; line-height: 1.8; color: var(--gray-700); margin-bottom: 12px; }
.about-cert {
  display: grid; grid-template-columns: repeat(2, 1fr); gap: 12px;
}
.cert-card {
  background: #fff; padding: 18px;
  border-radius: var(--radius);
  border: 1px solid var(--gray-200);
  text-align: center;
}
.cert-card .ic {
  width: 40px; height: 40px;
  background: var(--accent-light); color: var(--accent);
  border-radius: 8px;
  display: flex; align-items: center; justify-content: center;
  font-size: 18px; margin: 0 auto 8px;
}
.cert-card h5 { font-size: 13px; font-weight: 700; margin-bottom: 4px; }
.cert-card p { font-size: 12px; color: var(--gray-500); }

/* ===================================================
   响应式 - 平板 / PC
   =================================================== */
@media (min-width: 768px) {
  html { font-size: 15px; }
  .section { padding: 80px 0; }
  .section-title h2 { font-size: 36px; }
  .section-title p { font-size: 17px; }

  /* Hero */
  .hero { padding: 90px 0; }
  .hero-grid { grid-template-columns: 1.2fr 1fr; gap: 50px; }
  .hero h1 { font-size: 44px; }
  .hero-sub { font-size: 18px; }
  .hero-stats .item .num { font-size: 30px; }

  /* 痛点 */
  .pain-grid { grid-template-columns: repeat(2, 1fr); gap: 20px; }

  /* 解决方案 */
  .solution-intro { padding: 36px 28px; }
  .solution-intro h3 { font-size: 28px; }
  .solution-flow { grid-template-columns: repeat(2, 1fr); gap: 18px; }

  /* 优势 */
  .advantage-grid { grid-template-columns: repeat(2, 1fr); gap: 20px; }

  /* 数据 */
  .data-block { padding: 80px 0; }
  .data-grid { grid-template-columns: repeat(4, 1fr); gap: 20px; }
  .data-card .v { font-size: 42px; }
  .data-card .v small { font-size: 20px; }

  /* 案例 */
  .case-grid { grid-template-columns: repeat(4, 1fr); gap: 16px; }

  /* 价格 */
  .pricing-grid { grid-template-columns: repeat(3, 1fr); gap: 24px; }

  /* 口碑 */
  .test-grid { grid-template-columns: repeat(2, 1fr); }

  /* CTA */
  .cta-bottom h2 { font-size: 36px; }

  /* 页脚 */
  .footer-grid { grid-template-columns: 2fr 1fr 1fr 1fr; gap: 40px; }

  /* 功能页 */
  .feature-row { grid-template-columns: 1.2fr 1fr; }
  .feature-row.reverse { grid-template-columns: 1fr 1.2fr; }
  .feature-row.reverse .feature-text { order: 2; }
  .feature-row.reverse .feature-visual { order: 1; }

  /* 标杆 */
  .benchmark-list { grid-template-columns: repeat(2, 1fr); }

  /* 解决方案 */
  .solution-feature-grid { grid-template-columns: repeat(2, 1fr); }

  /* 帮助 */
  .help-grid { grid-template-columns: repeat(4, 1fr); }
  .help-tutorials { grid-template-columns: repeat(2, 1fr); }

  /* 关于 */
  .about-cert { grid-template-columns: repeat(4, 1fr); }
}

@media (min-width: 1024px) {
  html { font-size: 16px; }
  .hero h1 { font-size: 52px; }
  .hero-phone { width: 280px; height: 560px; }

  .test-grid { grid-template-columns: repeat(3, 1fr); }
}

/* 移动端导航 */
@media (max-width: 767px) {
  .nav-menu, .nav-cta { display: none; }
  .hamburger { display: flex; }
  .float-ctas { right: 10px; bottom: 80px; }
  .mobile-cta-bar { display: flex; }
  .case-grid { grid-template-columns: repeat(2, 1fr); gap: 10px; }
  body { padding-bottom: 72px; }
}