/* LAC AI作品集课程 - 产品落地页样式 */
* { margin: 0; padding: 0; box-sizing: border-box; }

:root {
  --primary: #e63946;
  --primary-dark: #c1121f;
  --text-dark: #1a1a1a;
  --text-body: #333333;
  --text-light: #666666;
  --text-muted: #999999;
  --bg-white: #ffffff;
  --bg-light: #fafafa;
  --bg-dark: #1a1a1a;
  --border-light: #e0e0e0;
  --border-lighter: #f0f0f0;
}

html { scroll-behavior: smooth; }

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  color: var(--text-body);
  background: var(--bg-white);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

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

/* 导航栏 */
.navbar {
  position: fixed; top: 0; left: 0; right: 0; z-index: 1000;
  background: rgba(255,255,255,0.95); backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border-lighter);
  transition: all 0.3s;
}
.navbar .container { display: flex; align-items: center; justify-content: space-between; height: 64px; }
.logo { font-size: 22px; font-weight: 800; color: var(--text-dark); letter-spacing: -0.5px; }
.logo span { color: var(--primary); }
.nav-links { display: flex; gap: 32px; list-style: none; }
.nav-links a { text-decoration: none; color: var(--text-body); font-size: 14px; font-weight: 500; transition: color 0.2s; }
.nav-links a:hover { color: var(--primary); }
.nav-cta {
  background: var(--primary); color: #fff; padding: 8px 20px; border-radius: 6px;
  text-decoration: none; font-size: 14px; font-weight: 600; transition: all 0.2s;
}
.nav-cta:hover { background: var(--primary-dark); transform: translateY(-1px); }

/* Hero区域 */
.hero {
  padding: 140px 0 100px; background: linear-gradient(135deg, #fff5f5 0%, #ffffff 50%, #fef2f2 100%);
  position: relative; overflow: hidden;
}
.hero::before {
  content: ''; position: absolute; top: -200px; right: -200px; width: 600px; height: 600px;
  background: radial-gradient(circle, rgba(230,57,70,0.08) 0%, transparent 70%);
  border-radius: 50%;
}
.hero .container { position: relative; z-index: 1; display: grid; grid-template-columns: 1.2fr 1fr; gap: 60px; align-items: center; }
.hero-badge {
  display: inline-block; background: rgba(230,57,70,0.1); color: var(--primary);
  padding: 6px 16px; border-radius: 20px; font-size: 13px; font-weight: 600; margin-bottom: 20px;
}
.hero h1 { font-size: 48px; font-weight: 800; color: var(--text-dark); line-height: 1.2; margin-bottom: 20px; letter-spacing: -1px; }
.hero h1 .highlight { color: var(--primary); }
.hero-subtitle { font-size: 18px; color: var(--text-light); margin-bottom: 32px; line-height: 1.7; }
.hero-features { display: flex; gap: 24px; margin-bottom: 36px; flex-wrap: wrap; }
.hero-feature { display: flex; align-items: center; gap: 8px; font-size: 14px; color: var(--text-body); font-weight: 500; }
.hero-feature::before { content: '✓'; color: var(--primary); font-weight: 700; }
.hero-cta-group { display: flex; gap: 16px; align-items: center; }
.btn-primary {
  display: inline-block; background: var(--primary); color: #fff; padding: 14px 36px;
  border-radius: 8px; text-decoration: none; font-size: 16px; font-weight: 600;
  transition: all 0.2s; border: none; cursor: pointer;
}
.btn-primary:hover { background: var(--primary-dark); transform: translateY(-2px); box-shadow: 0 8px 24px rgba(230,57,70,0.3); }
.btn-secondary {
  display: inline-block; background: transparent; color: var(--text-dark); padding: 14px 36px;
  border-radius: 8px; text-decoration: none; font-size: 16px; font-weight: 600;
  border: 2px solid var(--border-light); transition: all 0.2s;
}
.btn-secondary:hover { border-color: var(--primary); color: var(--primary); }
.hero-price { font-size: 14px; color: var(--text-light); }
.hero-price .original { text-decoration: line-through; color: var(--text-muted); }
.hero-price .current { color: var(--primary); font-size: 20px; font-weight: 700; }

.hero-image { position: relative; }
.hero-image img { width: 100%; border-radius: 16px; box-shadow: 0 20px 60px rgba(0,0,0,0.15); }

/* 通用Section */
.section { padding: 80px 0; }
.section-header { text-align: center; margin-bottom: 60px; }
.section-label { color: var(--primary); font-size: 14px; font-weight: 700; letter-spacing: 2px; text-transform: uppercase; margin-bottom: 12px; }
.section-title { font-size: 36px; font-weight: 800; color: var(--text-dark); margin-bottom: 16px; letter-spacing: -0.5px; }
.section-desc { font-size: 16px; color: var(--text-light); max-width: 640px; margin: 0 auto; line-height: 1.7; }

/* 痛点区域 */
.pain-points { background: var(--bg-light); }
.pain-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }
.pain-card {
  background: #fff; padding: 32px 24px; border-radius: 12px;
  border-top: 4px solid var(--primary); transition: all 0.3s;
}
.pain-card:hover { transform: translateY(-4px); box-shadow: 0 12px 32px rgba(0,0,0,0.08); }
.pain-icon { font-size: 32px; margin-bottom: 16px; }
.pain-card h3 { font-size: 18px; font-weight: 700; color: var(--text-dark); margin-bottom: 10px; }
.pain-card p { font-size: 14px; color: var(--text-light); line-height: 1.6; }

/* 核心优势 */
.advantages-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 32px; }
.advantage-card {
  padding: 40px 32px; border-radius: 16px; background: #fff;
  border: 1px solid var(--border-lighter); transition: all 0.3s;
}
.advantage-card:hover { border-color: var(--primary); box-shadow: 0 12px 40px rgba(230,57,70,0.1); }
.advantage-number { font-size: 48px; font-weight: 800; color: var(--primary); opacity: 0.2; margin-bottom: 8px; }
.advantage-card h3 { font-size: 22px; font-weight: 700; color: var(--text-dark); margin-bottom: 14px; }
.advantage-card p { font-size: 15px; color: var(--text-light); line-height: 1.7; }

/* 课程体系 */
.curriculum { background: var(--bg-dark); color: #fff; }
.curriculum .section-title { color: #fff; }
.curriculum .section-desc { color: rgba(255,255,255,0.6); }
.stages { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; margin-top: 48px; }
.stage-card {
  background: rgba(255,255,255,0.05); border: 1px solid rgba(255,255,255,0.1);
  border-radius: 12px; padding: 28px 20px; transition: all 0.3s;
}
.stage-card:hover { background: rgba(230,57,70,0.15); border-color: var(--primary); }
.stage-week { color: var(--primary); font-size: 13px; font-weight: 700; margin-bottom: 8px; }
.stage-card h4 { font-size: 18px; font-weight: 700; margin-bottom: 12px; color: #fff; }
.stage-card p { font-size: 13px; color: rgba(255,255,255,0.6); line-height: 1.6; margin-bottom: 12px; }
.stage-output { background: rgba(230,57,70,0.2); padding: 8px 12px; border-radius: 6px; font-size: 12px; color: #ffb3b8; }

/* 七步方法论 */
.methodology-flow { display: flex; align-items: center; justify-content: center; gap: 0; margin-top: 48px; flex-wrap: wrap; }
.method-step {
  text-align: center; padding: 20px 16px; min-width: 120px; position: relative;
}
.method-step .step-num {
  width: 48px; height: 48px; border-radius: 50%; background: var(--primary); color: #fff;
  display: flex; align-items: center; justify-content: center; font-size: 18px; font-weight: 700;
  margin: 0 auto 12px;
}
.method-step h4 { font-size: 15px; font-weight: 700; color: var(--text-dark); margin-bottom: 4px; }
.method-step p { font-size: 12px; color: var(--text-light); }
.method-arrow { color: var(--border-light); font-size: 24px; font-weight: 300; }

/* 服务保障 */
.service { background: var(--bg-light); }
.service-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 32px; }
.service-main {
  background: #fff; border-radius: 16px; padding: 40px; border-left: 6px solid var(--primary);
}
.service-main h3 { font-size: 24px; font-weight: 700; color: var(--text-dark); margin-bottom: 20px; }
.service-item { display: flex; gap: 16px; margin-bottom: 20px; }
.service-item-icon {
  width: 44px; height: 44px; border-radius: 10px; background: rgba(230,57,70,0.1);
  display: flex; align-items: center; justify-content: center; font-size: 20px; flex-shrink: 0;
}
.service-item h4 { font-size: 16px; font-weight: 600; color: var(--text-dark); margin-bottom: 4px; }
.service-item p { font-size: 14px; color: var(--text-light); }
.service-extra { display: flex; flex-direction: column; gap: 20px; }
.service-extra-card {
  background: #fff; border-radius: 12px; padding: 24px; border: 1px solid var(--border-lighter);
}
.service-extra-card h4 { font-size: 16px; font-weight: 700; color: var(--text-dark); margin-bottom: 8px; }
.service-extra-card p { font-size: 14px; color: var(--text-light); }

/* 人才扶持 */
.support-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }
.support-card {
  text-align: center; padding: 32px 20px; border-radius: 12px;
  background: linear-gradient(180deg, #fff 0%, #fafafa 100%); border: 1px solid var(--border-lighter);
}
.support-icon { font-size: 36px; margin-bottom: 16px; }
.support-card h4 { font-size: 16px; font-weight: 700; color: var(--text-dark); margin-bottom: 8px; }
.support-card p { font-size: 13px; color: var(--text-light); line-height: 1.6; }

/* 赠品 */
.bonus { background: var(--bg-light); }
.bonus-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.bonus-card {
  background: #fff; border-radius: 12px; padding: 32px 24px; position: relative; overflow: hidden;
  border: 1px solid var(--border-lighter);
}
.bonus-card::before {
  content: '赠品'; position: absolute; top: 16px; right: -28px; background: var(--primary); color: #fff;
  padding: 4px 32px; font-size: 11px; font-weight: 600; transform: rotate(45deg);
}
.bonus-icon { font-size: 32px; margin-bottom: 16px; }
.bonus-card h4 { font-size: 18px; font-weight: 700; color: var(--text-dark); margin-bottom: 10px; }
.bonus-card p { font-size: 14px; color: var(--text-light); line-height: 1.6; }

/* 学员案例 */
.cases-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.case-card {
  background: #fff; border-radius: 12px; overflow: hidden; border: 1px solid var(--border-lighter);
  transition: all 0.3s;
}
.case-card:hover { transform: translateY(-4px); box-shadow: 0 12px 32px rgba(0,0,0,0.1); }
.case-header { padding: 28px 24px; background: var(--bg-dark); color: #fff; }
.case-name { font-size: 22px; font-weight: 700; margin-bottom: 4px; }
.case-result { color: var(--primary); font-size: 15px; font-weight: 600; }
.case-body { padding: 24px; }
.case-body p { font-size: 14px; color: var(--text-light); line-height: 1.7; }

/* 适合人群 */
.audience { background: var(--bg-dark); color: #fff; }
.audience .section-title { color: #fff; }
.audience-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; margin-top: 48px; }
.audience-card {
  background: rgba(255,255,255,0.05); border: 1px solid rgba(255,255,255,0.1);
  border-radius: 12px; padding: 28px 20px; text-align: center;
}
.audience-icon { font-size: 32px; margin-bottom: 12px; }
.audience-card h4 { font-size: 16px; font-weight: 700; color: #fff; margin-bottom: 8px; }
.audience-card p { font-size: 13px; color: rgba(255,255,255,0.6); line-height: 1.6; }

/* 价格CTA */
.pricing {
  padding: 100px 0; background: linear-gradient(135deg, #1a1a1a 0%, #2d2d2d 100%); color: #fff;
  text-align: center;
}
.pricing-label { color: var(--primary); font-size: 14px; font-weight: 700; letter-spacing: 2px; margin-bottom: 16px; }
.pricing-title { font-size: 40px; font-weight: 800; margin-bottom: 20px; }
.pricing-desc { font-size: 16px; color: rgba(255,255,255,0.6); margin-bottom: 40px; max-width: 600px; margin-left: auto; margin-right: auto; }
.price-box { display: inline-flex; align-items: baseline; gap: 16px; margin-bottom: 40px; }
.price-original { font-size: 24px; color: rgba(255,255,255,0.4); text-decoration: line-through; }
.price-current { font-size: 64px; font-weight: 800; color: var(--primary); }
.price-unit { font-size: 18px; color: rgba(255,255,255,0.6); }
.pricing-features { display: flex; justify-content: center; gap: 32px; margin-bottom: 40px; flex-wrap: wrap; }
.pricing-feature { font-size: 15px; color: rgba(255,255,255,0.8); display: flex; align-items: center; gap: 8px; }
.pricing-feature::before { content: '✓'; color: var(--primary); font-weight: 700; }

/* 页脚 */
.footer { background: #0d0d0d; color: rgba(255,255,255,0.5); padding: 40px 0; text-align: center; font-size: 13px; }
.footer .logo { color: #fff; margin-bottom: 12px; }

/* 响应式 */
@media (max-width: 968px) {
  .hero .container { grid-template-columns: 1fr; }
  .hero h1 { font-size: 36px; }
  .pain-grid, .stages, .support-grid, .audience-grid { grid-template-columns: repeat(2, 1fr); }
  .advantages-grid, .cases-grid, .bonus-grid { grid-template-columns: 1fr; }
  .service-grid { grid-template-columns: 1fr; }
  .nav-links { display: none; }
  .methodology-flow { flex-direction: column; }
  .method-arrow { transform: rotate(90deg); }
}