/* ===== 主题变量 ===== */
:root {
  --bg-primary: linear-gradient(135deg, #0a0e27 0%, #1a1f3a 100%);
  --bg-solid: #0a0e27;
  --bg-card: rgba(255,255,255,0.03);
  --bg-card-hover: rgba(255,255,255,0.06);
  --bg-navbar-scroll: rgba(10, 14, 39, 0.85);
  --bg-footer: rgba(0,0,0,0.3);
  --bg-input: rgba(255,255,255,0.04);
  --bg-overlay: linear-gradient(180deg, rgba(10,14,39,0.3) 0%, rgba(10,14,39,0.9) 100%);
  --text-primary: #fff;
  --text-body: #b8c5d6;
  --text-muted: #6b7a8d;
  --text-dim: #4a5568;
  --border-card: rgba(255,255,255,0.06);
  --border-input: rgba(255,255,255,0.1);
  --border-light: rgba(255,255,255,0.05);
  --accent: #00d4ff;
  --accent-dark: #00a8cc;
  --accent-orange: #ff6b35;
  --accent-orange-light: #ff8f5e;
  --shadow-card: rgba(0,0,0,0.3);
  --hero-radial1: rgba(0,212,255,0.08);
  --hero-radial2: rgba(255,107,53,0.06);
  --stats-bg: rgba(255,255,255,0.02);
  --mobile-nav-bg: rgba(10,14,39,0.95);
  --compare-bad-bg: rgba(255,68,68,0.08);
  --compare-bad-text: #ff6b6b;
  --compare-good-bg: rgba(0,212,255,0.08);
  --compare-good-text: #00d4ff;
  --compare-bad-cell: #8b6b6b;
  --compare-bad-cell-bg: rgba(255,68,68,0.02);
  --compare-good-cell: #b8c5d6;
  --compare-good-cell-bg: rgba(0,212,255,0.02);
}

[data-theme="light"] {
  --bg-primary: linear-gradient(135deg, #f0f4f8 0%, #e2e8f0 100%);
  --bg-solid: #f0f4f8;
  --bg-card: rgba(255,255,255,0.8);
  --bg-card-hover: rgba(255,255,255,0.95);
  --bg-navbar-scroll: rgba(240, 244, 248, 0.9);
  --bg-footer: rgba(0,0,0,0.03);
  --bg-input: rgba(0,0,0,0.04);
  --bg-overlay: linear-gradient(180deg, rgba(240,244,248,0.3) 0%, rgba(240,244,248,0.95) 100%);
  --text-primary: #1a202c;
  --text-body: #4a5568;
  --text-muted: #718096;
  --text-dim: #a0aec0;
  --border-card: rgba(0,0,0,0.08);
  --border-input: rgba(0,0,0,0.15);
  --border-light: rgba(0,0,0,0.06);
  --shadow-card: rgba(0,0,0,0.08);
  --hero-radial1: rgba(0,180,220,0.06);
  --hero-radial2: rgba(255,107,53,0.04);
  --stats-bg: rgba(0,0,0,0.02);
  --mobile-nav-bg: rgba(240,244,248,0.97);
  --compare-bad-bg: rgba(255,68,68,0.06);
  --compare-bad-text: #e53e3e;
  --compare-good-bg: rgba(0,180,220,0.06);
  --compare-good-text: #0099bb;
  --compare-bad-cell: #9b5555;
  --compare-bad-cell-bg: rgba(255,68,68,0.03);
  --compare-good-cell: #4a5568;
  --compare-good-cell-bg: rgba(0,180,220,0.03);
}

/* ===== 全局基础 ===== */
* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  font-family: 'PingFang SC', 'Microsoft YaHei', 'Source Han Sans CN', sans-serif;
  background: var(--bg-primary);
  color: var(--text-body);
  overflow-x: hidden;
  transition: background 0.4s ease, color 0.4s ease;
}

/* ===== 导航栏 ===== */
.navbar {
  position: fixed; top: 0; left: 0; right: 0; z-index: 1000;
  padding: 20px 40px;
  transition: all 0.4s ease;
  background: transparent;
}
.navbar.scrolled {
  background: var(--bg-navbar-scroll);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  padding: 12px 40px;
  box-shadow: 0 4px 30px var(--shadow-card);
}
.nav-logo {
  display: flex; align-items: center; gap: 8px;
  font-size: 22px; font-weight: 800; color: #fff;
  text-decoration: none;
}
.nav-logo img {
  height: 36px; width: auto;
}
.nav-logo-text {
  background: linear-gradient(135deg, #00d4ff, #ff6b35);
  -webkit-background-clip: text; -webkit-text-fill-color: transparent;
  background-clip: text;
}
.nav-link {
  color: rgba(255,255,255,0.7); text-decoration: none; font-size: 15px;
  padding: 8px 16px; border-radius: 8px; transition: all 0.3s;
  position: relative;
}
.nav-link:hover { color: #fff; }
.nav-link::after {
  content: ''; position: absolute; bottom: 4px; left: 50%; width: 0; height: 2px;
  background: linear-gradient(90deg, #00d4ff, #ff6b35);
  transition: all 0.3s; transform: translateX(-50%);
}
.nav-link:hover::after { width: 60%; }

/* ===== Hero 区 ===== */
.hero {
  position: relative; min-height: 100vh; display: flex; align-items: center;
  justify-content: center; text-align: center; overflow: hidden;
}
.hero-bg {
  position: absolute; inset: 0; z-index: 0;
  background: radial-gradient(ellipse at 50% 50%, var(--hero-radial1) 0%, transparent 60%),
              radial-gradient(ellipse at 80% 20%, var(--hero-radial2) 0%, transparent 50%);
}
.hero-overlay {
  position: absolute; inset: 0; z-index: 1;
  background: var(--bg-overlay);
}
.hero-content { position: relative; z-index: 2; max-width: 900px; padding: 0 20px; }
.hero-title {
  font-size: clamp(36px, 6vw, 72px); font-weight: 900; color: #fff;
  line-height: 1.2; margin-bottom: 20px;
  background: linear-gradient(135deg, #ffffff 0%, #e0e8f0 100%);
  -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text;
}
.hero-subtitle {
  font-size: clamp(16px, 2.5vw, 22px); color: var(--text-body);
  margin-bottom: 40px; letter-spacing: 2px;
}
.hero-tags { display: flex; flex-wrap: wrap; gap: 12px; justify-content: center; margin-bottom: 48px; }
.hero-tag {
  padding: 10px 24px; border-radius: 50px; font-size: 14px; color: var(--text-primary);
  background: var(--bg-card); border: 1px solid var(--border-card);
  backdrop-filter: blur(10px); transition: all 0.3s; cursor: default;
}
.hero-tag:hover {
  background: rgba(0,212,255,0.15); border-color: rgba(0,212,255,0.4);
  box-shadow: 0 0 20px rgba(0,212,255,0.2);
}
.hero-cta { display: flex; gap: 20px; justify-content: center; flex-wrap: wrap; }

/* ===== 按钮系统 ===== */
.btn-primary {
  padding: 16px 40px; border-radius: 12px; font-size: 16px; font-weight: 600;
  color: #fff; border: none; cursor: pointer; text-decoration: none;
  background: linear-gradient(135deg, #ff6b35, #ff8f5e);
  box-shadow: 0 8px 32px rgba(255,107,53,0.3);
  transition: all 0.3s; position: relative; overflow: hidden;
}
.btn-primary::before {
  content: ''; position: absolute; top: 0; left: -100%; width: 100%; height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255,255,255,0.2), transparent);
  transition: left 0.5s;
}
.btn-primary:hover::before { left: 100%; }
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 12px 40px rgba(255,107,53,0.4); }

.btn-outline {
  padding: 16px 40px; border-radius: 12px; font-size: 16px; font-weight: 600;
  color: #fff; background: transparent; border: 2px solid rgba(255,255,255,0.2);
  cursor: pointer; text-decoration: none; transition: all 0.3s;
}
.btn-outline:hover {
  border-color: #00d4ff; color: #00d4ff;
  box-shadow: 0 0 30px rgba(0,212,255,0.15);
}

/* ===== 数据条 ===== */
.stats-bar {
  display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px;
  padding: 80px 40px;
  background: var(--stats-bg);
  border-top: 1px solid var(--border-light);
  border-bottom: 1px solid var(--border-light);
}
.stat-item { text-align: center; }
.stat-number {
  font-size: clamp(36px, 5vw, 56px); font-weight: 900;
  background: linear-gradient(135deg, #00d4ff, #00a8cc);
  -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text;
}
.stat-label { font-size: 15px; color: var(--text-muted); margin-top: 8px; }

/* ===== 通用区块 ===== */
.section { padding: 120px 40px; }
.section-title {
  font-size: clamp(28px, 4vw, 48px); font-weight: 800; color: #fff;
  text-align: center; margin-bottom: 16px;
}
.section-subtitle {
  font-size: 18px; color: var(--text-muted); text-align: center;
  margin-bottom: 64px; max-width: 600px; margin-left: auto; margin-right: auto;
}

/* ===== 服务卡片 ===== */
.services-grid {
  display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 24px; max-width: 1200px; margin: 0 auto;
}
.service-card {
  background: var(--bg-card);
  border: 1px solid var(--border-card);
  border-radius: 20px; padding: 40px 32px;
  backdrop-filter: blur(10px);
  transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
  position: relative; overflow: hidden;
}
.service-card::before {
  content: ''; position: absolute; inset: 0; border-radius: 20px;
  background: linear-gradient(135deg, rgba(0,212,255,0.1), rgba(255,107,53,0.05));
  opacity: 0; transition: opacity 0.4s;
}
.service-card:hover {
  transform: translateY(-8px);
  border-color: rgba(0,212,255,0.3);
  box-shadow: 0 20px 60px var(--shadow-card), 0 0 40px rgba(0,212,255,0.1);
}
.service-card:hover::before { opacity: 1; }
.service-card-icon {
  width: 64px; height: 64px; border-radius: 16px;
  background: linear-gradient(135deg, rgba(0,212,255,0.15), rgba(0,212,255,0.05));
  display: flex; align-items: center; justify-content: center;
  margin-bottom: 24px; font-size: 28px; position: relative; z-index: 1;
}
.service-card-title {
  font-size: 22px; font-weight: 700; color: #fff;
  margin-bottom: 12px; position: relative; z-index: 1;
}
.service-card-desc { font-size: 15px; line-height: 1.7; margin-bottom: 24px; position: relative; z-index: 1; color: var(--text-body); }
.service-card-link {
  color: #00d4ff; text-decoration: none; font-size: 14px; font-weight: 600;
  position: relative; z-index: 1; transition: all 0.3s;
}
.service-card-link:hover { color: #ff6b35; }

/* ===== 案例轮播 ===== */
.cases-scroll {
  display: flex; gap: 24px; overflow-x: auto; padding: 0 40px 20px;
  scroll-snap-type: x mandatory; -webkit-overflow-scrolling: touch;
  scrollbar-width: none;
}
.cases-scroll::-webkit-scrollbar { display: none; }
.case-card {
  flex: 0 0 320px; scroll-snap-align: start;
  border-radius: 16px; overflow: hidden;
  background: var(--bg-card); border: 1px solid var(--border-card);
  transition: all 0.3s; cursor: pointer;
}
.case-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 16px 48px var(--shadow-card);
}
.case-thumb {
  width: 100%; height: 200px; object-fit: cover;
  background: linear-gradient(135deg, #1a1f3a, #2a2f5a);
}
.case-info { padding: 20px; }
.case-name { font-size: 16px; font-weight: 600; color: #fff; margin-bottom: 8px; }
.case-meta { display: flex; gap: 12px; font-size: 13px; color: var(--text-muted); }

/* ===== 合作流程 ===== */
.process-timeline {
  display: flex; justify-content: center; gap: 0; max-width: 1100px;
  margin: 0 auto; position: relative;
}
.process-step {
  flex: 1; text-align: center; padding: 0 16px; position: relative;
}
.process-dot {
  width: 48px; height: 48px; border-radius: 50%; margin: 0 auto 20px;
  background: linear-gradient(135deg, rgba(0,212,255,0.2), rgba(0,212,255,0.05));
  border: 2px solid rgba(0,212,255,0.3);
  display: flex; align-items: center; justify-content: center;
  font-size: 20px; transition: all 0.3s; position: relative; z-index: 2;
}
.process-step:hover .process-dot {
  background: linear-gradient(135deg, #00d4ff, #00a8cc);
  box-shadow: 0 0 30px rgba(0,212,255,0.4);
  transform: scale(1.15);
}
.process-line {
  position: absolute; top: 24px; left: calc(50% + 24px); right: calc(-50% + 24px);
  height: 2px; background: rgba(0,212,255,0.15); z-index: 1;
}
.process-step:last-child .process-line { display: none; }
.process-name { font-size: 16px; font-weight: 600; color: #fff; margin-bottom: 8px; }
.process-desc { font-size: 13px; color: var(--text-muted); }

/* ===== 客户评价 ===== */
.testimonials-grid {
  display: grid; grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 24px; max-width: 1100px; margin: 0 auto;
}
.testimonial-card {
  background: var(--bg-card); border: 1px solid var(--border-card);
  border-radius: 20px; padding: 36px; transition: all 0.3s;
}
.testimonial-card:hover {
  border-color: rgba(255,107,53,0.3);
  box-shadow: 0 12px 40px var(--shadow-card);
}
.testimonial-stars { color: #ffd700; font-size: 18px; margin-bottom: 16px; }
.testimonial-text { font-size: 15px; line-height: 1.8; margin-bottom: 24px; font-style: italic; }
.testimonial-author { display: flex; align-items: center; gap: 16px; }
.testimonial-avatar {
  width: 48px; height: 48px; border-radius: 50%;
  background: linear-gradient(135deg, #00d4ff, #ff6b35);
  display: flex; align-items: center; justify-content: center;
  font-size: 20px; font-weight: 700; color: #fff;
}
.testimonial-name { font-size: 15px; font-weight: 600; color: #fff; }
.testimonial-role { font-size: 13px; color: var(--text-muted); }

/* ===== 底部 CTA ===== */
.cta-section {
  text-align: center; padding: 120px 40px;
  background: radial-gradient(ellipse at center, rgba(255,107,53,0.08) 0%, transparent 60%);
}
.cta-title {
  font-size: clamp(28px, 4vw, 44px); font-weight: 800; color: #fff; margin-bottom: 40px;
}

/* ===== Footer ===== */
.footer {
  padding: 60px 40px 30px;
  background: var(--bg-footer);
  border-top: 1px solid var(--border-light);
}
.footer-grid {
  display: grid; grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 40px; max-width: 1200px; margin: 0 auto 40px;
}
.footer-brand { font-size: 24px; font-weight: 800; margin-bottom: 16px; }
.footer-desc { font-size: 14px; line-height: 1.8; color: var(--text-muted); }
.footer-title { font-size: 16px; font-weight: 600; color: var(--text-primary); margin-bottom: 20px; }
.footer-link {
  display: block; color: var(--text-muted); text-decoration: none;
  font-size: 14px; margin-bottom: 12px; transition: color 0.3s;
}
.footer-link:hover { color: #00d4ff; }
.footer-bottom {
  display: flex; align-items: center; justify-content: center; gap: 16px; flex-wrap: wrap;
  text-align: center; padding-top: 30px;
  border-top: 1px solid var(--border-light);
  font-size: 13px; color: var(--text-dim);
}

/* ===== 套餐卡片（服务详情页） ===== */
.pricing-grid {
  display: grid; grid-template-columns: repeat(3, 1fr);
  gap: 24px; max-width: 1200px; margin: 0 auto; align-items: start;
}
.pricing-card {
  background: var(--bg-card); border: 1px solid var(--border-card);
  border-radius: 24px; padding: 40px 32px; transition: all 0.4s; position: relative;
}
.pricing-card.featured {
  background: var(--bg-card-hover);
  border-color: rgba(255,215,0,0.3);
  transform: scale(1.05);
  box-shadow: 0 20px 60px var(--shadow-card), 0 0 40px rgba(255,215,0,0.1);
}
.pricing-badge {
  position: absolute; top: -14px; left: 50%; transform: translateX(-50%);
  padding: 6px 24px; border-radius: 50px; font-size: 13px; font-weight: 700;
  background: linear-gradient(135deg, #ffd700, #ffaa00);
  color: #1a1a2e; white-space: nowrap;
}
.pricing-name { font-size: 24px; font-weight: 700; color: #fff; text-align: center; margin-bottom: 8px; }
.pricing-price {
  font-size: 42px; font-weight: 900; text-align: center; margin-bottom: 4px;
  background: linear-gradient(135deg, #00d4ff, #00a8cc);
  -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text;
}
.pricing-original {
  text-align: center; font-size: 14px; color: var(--text-muted);
  text-decoration: line-through; margin-bottom: 32px;
}
.pricing-list { list-style: none; margin-bottom: 32px; }
.pricing-list li {
  padding: 10px 0; font-size: 14px; border-bottom: 1px solid var(--border-light);
  display: flex; align-items: center; gap: 10px;
}
.pricing-list .check { color: #00d4ff; }
.pricing-list .cross { color: #4a5568; }
.pricing-formats { margin-bottom: 32px; }
.pricing-format-title { font-size: 14px; font-weight: 600; color: #fff; margin-bottom: 12px; }
.pricing-format-item {
  display: flex; justify-content: space-between; padding: 8px 0;
  font-size: 13px; border-bottom: 1px solid var(--border-light);
}
.pricing-format-count { color: #00d4ff; font-weight: 600; }
.pricing-suit { font-size: 13px; color: var(--text-muted); text-align: center; margin-bottom: 24px; }
.pricing-btn {
  display: block; width: 100%; padding: 16px; border-radius: 12px;
  font-size: 16px; font-weight: 600; text-align: center;
  text-decoration: none; transition: all 0.3s; cursor: pointer; border: none;
}
.pricing-btn-primary {
  background: linear-gradient(135deg, #ff6b35, #ff8f5e); color: #fff;
  box-shadow: 0 8px 24px rgba(255,107,53,0.3);
}
.pricing-btn-primary:hover { transform: translateY(-2px); box-shadow: 0 12px 32px rgba(255,107,53,0.4); }
.pricing-btn-outline {
  background: transparent; color: #fff;
  border: 2px solid rgba(255,255,255,0.15);
}
.pricing-btn-outline:hover { border-color: #00d4ff; color: #00d4ff; }

/* ===== 视频模板图鉴 ===== */
.template-block {
  display: grid; grid-template-columns: 1fr 1fr; gap: 48px;
  max-width: 1100px; margin: 0 auto 80px; align-items: center;
}
.template-block.reverse { direction: rtl; }
.template-block.reverse > * { direction: ltr; }
.template-media {
  border-radius: 20px; overflow: hidden; position: relative;
  background: rgba(255,255,255,0.03); aspect-ratio: 16/9;
}
.template-video-placeholder {
  width: 100%; height: 100%; min-height: 240px;
  background: linear-gradient(135deg, #1a1f3a, #2a2f5a);
  display: flex; align-items: center; justify-content: center;
  font-size: 48px; cursor: pointer; transition: all 0.3s;
}
.template-video-placeholder:hover { background: linear-gradient(135deg, #2a2f5a, #3a3f7a); }
.template-thumbs { display: flex; gap: 12px; margin-top: 16px; }
.template-thumb {
  flex: 1; height: 80px; border-radius: 12px;
  background: linear-gradient(135deg, #1a1f3a, #2a2f5a);
  cursor: pointer; transition: all 0.3s;
}
.template-thumb:hover { opacity: 0.8; transform: scale(1.03); }
.template-info { padding: 20px 0; }
.template-name {
  font-size: 28px; font-weight: 800; color: #fff; margin-bottom: 16px;
  display: flex; align-items: center; gap: 12px;
}
.template-name-badge {
  padding: 4px 12px; border-radius: 6px; font-size: 12px; font-weight: 600;
  background: rgba(0,212,255,0.15); color: #00d4ff;
}
.template-desc { font-size: 15px; line-height: 1.8; margin-bottom: 20px; }
.template-scenes { font-size: 14px; color: #6b7a8d; margin-bottom: 16px; }
.template-scenes strong { color: #fff; }
.template-difficulty { display: flex; gap: 4px; margin-bottom: 24px; }
.template-difficulty-dot {
  width: 8px; height: 8px; border-radius: 50%;
  background: rgba(0,212,255,0.2);
}
.template-difficulty-dot.active { background: #00d4ff; }

/* ===== 专业价值对比区 ===== */
.compare-section {
  max-width: 1000px; margin: 0 auto;
  background: var(--stats-bg); border-radius: 24px;
  border: 1px solid var(--border-card); overflow: hidden;
}
.compare-header {
  display: grid; grid-template-columns: 1fr 1fr;
  text-align: center; padding: 24px;
}
.compare-header-left {
  background: var(--compare-bad-bg); color: var(--compare-bad-text);
  font-weight: 700; font-size: 18px; padding: 16px;
}
.compare-header-right {
  background: var(--compare-good-bg); color: var(--compare-good-text);
  font-weight: 700; font-size: 18px; padding: 16px;
}
.compare-row {
  display: grid; grid-template-columns: 1fr 1fr;
  border-bottom: 1px solid var(--border-light);
}
.compare-cell {
  padding: 20px 24px; font-size: 14px; line-height: 1.6;
  display: flex; align-items: center; gap: 10px;
}
.compare-cell.bad { color: var(--compare-bad-cell); background: var(--compare-bad-cell-bg); }
.compare-cell.good { color: var(--compare-good-cell); background: var(--compare-good-cell-bg); }
.compare-quote {
  max-width: 800px; margin: 60px auto 0; text-align: center;
  font-size: clamp(18px, 3vw, 26px); font-weight: 700; color: #fff;
  line-height: 1.6; padding: 0 20px;
}
.compare-quote span {
  background: linear-gradient(135deg, #00d4ff, #ff6b35);
  -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text;
}

/* ===== FAQ ===== */
.faq-list { max-width: 800px; margin: 0 auto; }
.faq-item {
  border: 1px solid var(--border-card); border-radius: 16px;
  margin-bottom: 12px; overflow: hidden; transition: all 0.3s;
}
.faq-item:hover { border-color: rgba(0,212,255,0.2); }
.faq-question {
  padding: 24px 28px; font-size: 16px; font-weight: 600; color: var(--text-primary);
  cursor: pointer; display: flex; justify-content: space-between; align-items: center;
  background: var(--bg-card); transition: background 0.3s;
}
.faq-question:hover { background: var(--bg-card-hover); }
.faq-arrow { transition: transform 0.3s; font-size: 14px; color: var(--text-muted); }
.faq-item.open .faq-arrow { transform: rotate(180deg); color: #00d4ff; }
.faq-answer {
  max-height: 0; overflow: hidden; transition: max-height 0.4s ease, padding 0.3s;
  padding: 0 28px; font-size: 15px; line-height: 1.8; color: var(--text-body);
}
.faq-item.open .faq-answer { max-height: 300px; padding: 0 28px 24px; }

/* ===== 签约页 ===== */
.stepper {
  display: flex; justify-content: center; gap: 0; max-width: 700px;
  margin: 0 auto 60px; position: relative;
}
.step-item {
  display: flex; flex-direction: column; align-items: center;
  flex: 1; position: relative;
}
.step-circle {
  width: 40px; height: 40px; border-radius: 50%;
  background: var(--bg-card); border: 2px solid var(--border-input);
  display: flex; align-items: center; justify-content: center;
  font-size: 14px; font-weight: 700; color: var(--text-muted);
  transition: all 0.3s; margin-bottom: 10px; position: relative; z-index: 2;
}
.step-item.active .step-circle {
  background: linear-gradient(135deg, #00d4ff, #00a8cc);
  border-color: #00d4ff; color: #fff;
  box-shadow: 0 0 20px rgba(0,212,255,0.4);
}
.step-item.done .step-circle {
  background: linear-gradient(135deg, #00d4ff, #00a8cc);
  border-color: #00d4ff; color: #fff;
}
.step-label { font-size: 12px; color: var(--text-muted); text-align: center; }
.step-item.active .step-label { color: #00d4ff; }
.step-line {
  position: absolute; top: 20px; left: calc(50% + 20px);
  right: calc(-50% + 20px); height: 2px;
  background: var(--border-input); z-index: 1;
}
.step-item.done .step-line { background: #00d4ff; }
.step-item:last-child .step-line { display: none; }

/* ===== 签名画布 ===== */
.signature-pad {
  border: 2px dashed var(--border-input); border-radius: 16px;
  background: var(--bg-card); cursor: crosshair;
  touch-action: none;
}

/* ===== 表单 ===== */
.form-group { margin-bottom: 24px; }
.form-label {
  display: block; font-size: 14px; font-weight: 600;
  color: var(--text-primary); margin-bottom: 8px;
}
.form-input {
  width: 100%; padding: 14px 18px; border-radius: 12px;
  background: var(--bg-input); border: 1px solid var(--border-input);
  color: var(--text-primary); font-size: 15px; outline: none; transition: all 0.3s;
}
.form-input:focus {
  border-color: var(--accent); background: rgba(0,212,255,0.05);
  box-shadow: 0 0 20px rgba(0,212,255,0.1);
}
.form-input::placeholder { color: var(--text-dim); }
select.form-input {
  -webkit-appearance: menulist; appearance: menulist;
  cursor: pointer;
}
select.form-input option {
  background: var(--bg-solid); color: var(--text-primary);
  padding: 10px;
}
textarea.form-input { min-height: 100px; resize: vertical; }

/* ===== 滚动动画 ===== */
.reveal {
  opacity: 0; transform: translateY(40px);
  transition: opacity 0.8s ease, transform 0.8s ease;
}
.reveal.visible { opacity: 1; transform: translateY(0); }

/* ===== 粒子背景 ===== */
#particles-canvas {
  position: absolute; inset: 0; z-index: 0; pointer-events: none;
}

/* ===== 移动端汉堡菜单 ===== */
.mobile-toggle {
  display: none; flex-direction: column; gap: 5px;
  cursor: pointer; padding: 8px; z-index: 1001;
  -webkit-tap-highlight-color: transparent; touch-action: manipulation;
}
.mobile-toggle span {
  width: 24px; height: 2px; background: #fff;
  transition: all 0.3s; border-radius: 2px;
}
.mobile-nav {
  display: none; position: fixed; inset: 0; z-index: 999;
  background: var(--mobile-nav-bg); backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  flex-direction: column; align-items: center; justify-content: center; gap: 24px;
}
.mobile-nav.open { display: flex; animation: fadeIn 0.25s ease; }
@keyframes fadeIn { from { opacity: 0; } to { opacity: 1; } }

/* ===== 响应式 ===== */
@media (max-width: 1024px) {
  .pricing-grid { grid-template-columns: 1fr; max-width: 420px; }
  .pricing-card.featured { transform: scale(1); }
  .template-block { grid-template-columns: 1fr; gap: 24px; }
  .template-block.reverse { direction: ltr; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 768px) {
  .section { padding: 80px 20px; }
  .navbar { padding: 12px 16px; }
  .navbar.scrolled { padding: 8px 16px; }
  .nav-links { display: none !important; }
  .mobile-toggle { display: flex; }
  /* Hero 手机端防重叠 */
  .hero { min-height: auto; padding: 120px 16px 60px; align-items: flex-start; }
  .hero-content { padding: 0 8px; }
  .hero-content > div:first-child { margin-bottom: 20px !important; }
  .hero-content > div:first-child img { height: 40px !important; }
  .hero-content > div:first-child span { font-size: 28px !important; }
  .hero-title { margin-bottom: 12px; }
  .hero-subtitle { margin-bottom: 24px; }
  .hero-tags { gap: 8px; margin-bottom: 32px; }
  .hero-tag { font-size: 12px; padding: 6px 12px; }
  .hero-cta { flex-direction: column; align-items: center; }
  /* 统计条 */
  .stats-bar { grid-template-columns: repeat(2, 1fr); padding: 40px 20px; }
  /* 时间线 */
  .process-timeline { flex-direction: column; gap: 24px; }
  .process-line { display: none !important; }
  /* 评价 */
  .testimonials-grid { grid-template-columns: 1fr; }
  /* 页脚 */
  .footer-grid { grid-template-columns: 1fr; }
  /* 对比表 */
  .compare-header, .compare-row { grid-template-columns: 1fr; }
  /* 步进器 */
  .stepper { gap: 0; }
  .step-label { font-size: 10px; }
  /* 定价 */
  .pricing-type-grid { grid-template-columns: 1fr 1fr; }
  .pricing-duration-grid { grid-template-columns: repeat(2, 1fr); }
  /* 子页面头部适配 */
  .section[style*="padding-top:160px"] { padding-top: 120px !important; padding-bottom: 40px !important; }
  /* 弹窗适配 */
  .modal-content { max-width: 95vw !important; padding: 20px !important; max-height: 90vh; overflow-y: auto; }
  /* 合同预览 */
  .contract-preview { max-height: 50vh; }
}

/* ===== 新定价交互模块 ===== */
.pricing-type-grid {
  display: grid; grid-template-columns: repeat(3, 1fr);
  gap: 16px; max-width: 900px; margin: 0 auto 48px;
}
.pricing-type-card {
  background: var(--bg-card); border: 2px solid var(--border-card);
  border-radius: 16px; padding: 28px 20px; text-align: center;
  cursor: pointer; transition: all 0.3s;
}
.pricing-type-card:hover {
  border-color: rgba(0,212,255,0.3); transform: translateY(-4px);
  box-shadow: 0 12px 36px var(--shadow-card);
}
.pricing-type-card.active {
  border-color: #00d4ff; background: rgba(0,212,255,0.06);
  box-shadow: 0 0 30px rgba(0,212,255,0.15);
}
.pricing-type-name {
  font-size: 18px; font-weight: 700; color: var(--text-primary); margin-bottom: 8px;
}
.pricing-type-base {
  font-size: 14px; color: #00d4ff; font-weight: 600;
}
.pricing-type-desc {
  font-size: 12px; color: var(--text-muted); margin-top: 6px;
}

.pricing-detail-panel {
  max-width: 700px; margin: 0 auto;
  background: var(--bg-card); border: 1px solid var(--border-card);
  border-radius: 20px; padding: 40px; display: none;
}
.pricing-detail-panel.show { display: block; }

.pricing-duration-grid {
  display: grid; grid-template-columns: repeat(4, 1fr);
  gap: 12px; margin-bottom: 32px;
}
.duration-btn {
  padding: 16px 8px; border-radius: 12px; text-align: center;
  background: var(--bg-card); border: 2px solid var(--border-card);
  cursor: pointer; transition: all 0.3s;
}
.duration-btn:hover {
  border-color: rgba(0,212,255,0.3); background: rgba(0,212,255,0.04);
}
.duration-btn.active {
  border-color: #00d4ff; background: rgba(0,212,255,0.08);
}
.duration-label { font-size: 13px; color: var(--text-muted); margin-bottom: 6px; }
.duration-price { font-size: 22px; font-weight: 800; color: var(--text-primary); }
.duration-unit { font-size: 12px; color: var(--text-muted); }
.duration-btn.active .duration-price { color: #00d4ff; }
.duration-btn.active .duration-label { color: #00d4ff; }
.duration-tag {
  display: inline-block; padding: 2px 8px; border-radius: 4px;
  font-size: 11px; font-weight: 600; margin-top: 6px;
  background: rgba(255,107,53,0.15); color: #ff6b35;
}

.pricing-content-box {
  background: rgba(0,212,255,0.04); border: 1px solid rgba(0,212,255,0.12);
  border-radius: 16px; padding: 28px; display: none;
}
.pricing-content-box.show { display: block; }
.pricing-content-title {
  font-size: 20px; font-weight: 700; color: #fff; margin-bottom: 8px;
}
.pricing-content-total {
  font-size: 32px; font-weight: 900; margin-bottom: 4px;
  background: linear-gradient(135deg, #00d4ff, #00a8cc);
  -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text;
}
.pricing-content-monthly { font-size: 14px; color: var(--text-muted); margin-bottom: 20px; }
.pricing-content-list { list-style: none; }
.pricing-content-list li {
  padding: 10px 0; font-size: 14px; color: var(--text-body);
  border-bottom: 1px solid var(--border-light);
  display: flex; align-items: center; gap: 10px;
}
.pricing-content-list li::before {
  content: '✓'; color: #00d4ff; font-weight: 700;
}
.pricing-cta-row {
  margin-top: 28px; display: flex; gap: 16px; justify-content: center;
}

/* ===== 主题切换按钮 ===== */
.theme-toggle {
  width: 40px; height: 40px; border-radius: 10px;
  background: var(--bg-card); border: 1px solid var(--border-card);
  cursor: pointer; display: flex; align-items: center; justify-content: center;
  font-size: 18px; transition: all 0.3s; color: var(--text-primary);
  flex-shrink: 0;
}
.theme-toggle:hover {
  border-color: var(--accent); background: var(--bg-card-hover);
  box-shadow: 0 0 16px rgba(0,212,255,0.15);
}

/* ===== 日间模式补充覆盖 ===== */
[data-theme="light"] .hero-title {
  background: linear-gradient(135deg, #1a202c 0%, #2d3748 100%);
  -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text;
}
[data-theme="light"] .nav-logo { color: #1a202c; }
[data-theme="light"] .nav-link { color: rgba(26,32,44,0.7); }
[data-theme="light"] .nav-link:hover { color: #1a202c; }
[data-theme="light"] .section-title,
[data-theme="light"] .service-card-title,
[data-theme="light"] .case-name,
[data-theme="light"] .process-name,
[data-theme="light"] .testimonial-name,
[data-theme="light"] .pricing-name,
[data-theme="light"] .pricing-format-title,
[data-theme="light"] .pricing-content-title,
[data-theme="light"] .cta-title,
[data-theme="light"] .compare-quote,
[data-theme="light"] .template-name,
[data-theme="light"] .footer-brand {
  color: #1a202c;
}
[data-theme="light"] .mobile-toggle span { background: #1a202c; }
[data-theme="light"] .pricing-type-card.active { background: rgba(0,180,220,0.06); }
[data-theme="light"] .duration-btn.active { background: rgba(0,180,220,0.06); }
[data-theme="light"] .pricing-content-box { background: rgba(0,180,220,0.04); border-color: rgba(0,180,220,0.12); }
[data-theme="light"] .btn-primary { color: #fff; }
[data-theme="light"] .pricing-btn-primary { color: #fff; }
[data-theme="light"] .pricing-btn-outline { color: #1a202c; border-color: rgba(0,0,0,0.15); }
[data-theme="light"] .pricing-btn-outline:hover { border-color: #0099bb; color: #0099bb; }
[data-theme="light"] .btn-outline { color: #1a202c; border-color: rgba(0,0,0,0.2); }
[data-theme="light"] .btn-outline:hover { border-color: #0099bb; color: #0099bb; }
[data-theme="light"] .template-video-placeholder {
  background: linear-gradient(135deg, #e2e8f0, #cbd5e0);
}
[data-theme="light"] .template-video-placeholder:hover { background: linear-gradient(135deg, #cbd5e0, #b2c0cc); }
[data-theme="light"] .template-thumb {
  background: linear-gradient(135deg, #e2e8f0, #cbd5e0);
}
[data-theme="light"] .case-thumb {
  background: linear-gradient(135deg, #e2e8f0, #cbd5e0);
}
[data-theme="light"] .template-media {
  background: rgba(0,0,0,0.03);
}
[data-theme="light"] .template-scenes strong { color: #1a202c; }
[data-theme="light"] .template-difficulty-dot { background: rgba(0,180,220,0.15); }
[data-theme="light"] .template-difficulty-dot.active { background: #0099bb; }
[data-theme="light"] .pricing-list .cross { color: var(--text-dim); }
[data-theme="light"] .hero-tag { color: #1a202c; }
[data-theme="light"] .hero-tag:hover { background: rgba(0,180,220,0.1); border-color: rgba(0,180,220,0.3); }
[data-theme="light"] .service-card:hover::before {
  background: linear-gradient(135deg, rgba(0,180,220,0.08), rgba(255,107,53,0.04));
}
[data-theme="light"] .pricing-card.featured {
  box-shadow: 0 20px 60px rgba(0,0,0,0.1), 0 0 40px rgba(255,215,0,0.08);
}

/* ===== 案例页：筛选栏 ===== */
.filter-bar {
  display: flex; gap: 12px; justify-content: center; flex-wrap: wrap;
  max-width: 1200px; margin: 0 auto; padding: 0 20px;
}
.filter-btn {
  padding: 10px 24px; border-radius: 999px; border: 1px solid var(--border-card);
  background: var(--bg-card); color: var(--text-body); font-size: 15px; font-weight: 600;
  cursor: pointer; transition: all 0.3s ease;
}
.filter-btn:hover { border-color: var(--accent); color: var(--accent); }
.filter-btn.active {
  background: linear-gradient(135deg, var(--accent), var(--accent-orange));
  color: #fff; border-color: transparent;
}

/* ===== 案例页：卡片网格 ===== */
.portfolio-grid {
  display: grid; grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 24px; max-width: 1200px; margin: 0 auto; padding: 0 20px;
}
.portfolio-card {
  background: var(--bg-card); border: 1px solid var(--border-card);
  border-radius: 16px; overflow: hidden; cursor: pointer;
  transition: transform 0.3s ease, box-shadow 0.3s ease, border-color 0.3s ease;
}
.portfolio-card:hover {
  transform: translateY(-6px);
  box-shadow: 0 12px 40px rgba(0,212,255,0.12);
  border-color: rgba(0,212,255,0.2);
}
.portfolio-thumb {
  height: 160px; display: flex; align-items: center; justify-content: center;
  font-size: 56px; overflow: hidden;
  background: linear-gradient(135deg, rgba(0,212,255,0.06), rgba(255,107,53,0.04));
}
.portfolio-thumb.has-image {
  padding: 0; position: relative;
}
.portfolio-thumb img {
  width: 100%; height: 100%; object-fit: cover;
  transition: transform 0.3s ease;
}
.portfolio-card:hover .portfolio-thumb img {
  transform: scale(1.05);
}
.portfolio-thumb .play-badge {
  position: absolute; bottom: 12px; right: 12px;
  width: 52px; height: 52px; border-radius: 50%;
  background: rgba(255,107,53,0.9); border: 3px solid rgba(255,255,255,0.95);
  display: flex; align-items: center; justify-content: center;
  font-size: 20px; color: #fff; pointer-events: none;
  box-shadow: 0 4px 16px rgba(255,107,53,0.5);
  transition: transform 0.3s ease, background 0.3s ease;
}
.portfolio-card:hover .play-badge {
  transform: scale(1.2); background: rgba(255,107,53,1);
  box-shadow: 0 6px 24px rgba(255,107,53,0.7);
}
.portfolio-info { padding: 20px; }
.portfolio-title { font-size: 18px; font-weight: 700; color: var(--text-primary); margin-bottom: 8px; }
.portfolio-tags { display: flex; gap: 8px; flex-wrap: wrap; margin-bottom: 12px; }
.portfolio-tag {
  padding: 3px 10px; border-radius: 999px; font-size: 12px; font-weight: 600;
  background: rgba(0,212,255,0.08); color: var(--accent); border: 1px solid rgba(0,212,255,0.15);
}
.portfolio-stats {
  display: flex; gap: 12px; font-size: 13px; color: var(--text-muted);
}

/* ===== 弹窗 ===== */
.modal-overlay {
  position: fixed; inset: 0; background: rgba(0,0,0,0.7);
  display: flex; align-items: center; justify-content: center;
  z-index: 9999; opacity: 0; pointer-events: none; transition: opacity 0.3s ease;
}
.modal-overlay.active { opacity: 1; pointer-events: auto; }
.modal-content {
  background: var(--bg-solid); border: 1px solid var(--border-card);
  border-radius: 20px; padding: 28px; max-width: 680px; width: 92%;
  position: relative; transform: translateY(20px); transition: transform 0.3s ease;
  max-height: 90vh; overflow-y: auto;
}
.modal-overlay.active .modal-content { transform: translateY(0); }
.modal-close {
  position: absolute; top: 16px; right: 20px; background: none; border: none;
  color: var(--text-muted); font-size: 28px; cursor: pointer; line-height: 1;
}
.modal-close:hover { color: var(--text-primary); }

/* ===== 弹窗响应式 ===== */
@media (max-width: 768px) {
  .modal-content { padding: 16px !important; margin: 8px; max-height: 95vh; }
  #modalTitle { font-size: 18px !important; margin-bottom: 12px !important; }
  #modalStats { gap: 8px; }
  #modalStats > div { min-width: 80px !important; padding: 10px !important; }
  #modalStats > div > div:last-child { font-size: 14px !important; }
  .portfolio-thumb .play-badge { width: 44px; height: 44px; font-size: 18px; }
}

/* ===== 二级导航：业务线下拉（桌面） ===== */
.nav-item { position: relative; }
.nav-top {
  display: flex; align-items: center; gap: 5px;
  background: none; border: none; cursor: pointer; font-family: inherit;
  color: rgba(255,255,255,0.7); font-size: 15px;
  padding: 8px 14px; border-radius: 8px; transition: all 0.3s; position: relative;
}
.nav-top:hover { color: #fff; }
.nav-top::after {
  content: ''; position: absolute; bottom: 4px; left: 50%; width: 0; height: 2px;
  background: linear-gradient(90deg,#00d4ff,#ff6b35);
  transition: all 0.3s; transform: translateX(-50%);
}
.nav-top:hover::after, .nav-item.open .nav-top::after { width: 60%; }
.nav-top .caret {
  font-size: 10px; color: var(--text-muted); display: inline-block; transition: transform 0.25s; line-height: 1;
}
.nav-item.open .nav-top .caret { transform: rotate(180deg); }
.nav-item.open .nav-top { color: #00d4ff; }
.nav-sub {
  position: absolute; top: calc(100% + 8px); left: 0; min-width: 188px;
  background: var(--bg-solid); border: 1px solid var(--border-card);
  border-radius: 14px; padding: 8px;
  box-shadow: 0 18px 48px var(--shadow-card);
  opacity: 0; visibility: hidden; transform: translateY(10px);
  transition: opacity .22s ease, transform .22s ease, visibility .22s;
  z-index: 1100;
}
.nav-item:hover .nav-sub, .nav-item.open .nav-sub, .nav-item:focus-within .nav-sub {
  opacity: 1; visibility: visible; transform: translateY(0);
}
.nav-sub a {
  display: flex; align-items: center; gap: 8px;
  padding: 9px 13px; border-radius: 9px; color: var(--text-body);
  font-size: 14px; text-decoration: none; transition: all .18s; white-space: nowrap;
}
.nav-sub a .ico { font-size: 15px; }
.nav-sub a:hover { background: rgba(0,212,255,0.08); color: #00d4ff; }
.nav-sub a.active { color: #00d4ff; font-weight: 700; background: rgba(0,212,255,0.1); }
.nav-link.active { color: #00d4ff !important; }

[data-theme="light"] .nav-top { color: rgba(26,32,44,0.7); }
[data-theme="light"] .nav-top:hover, [data-theme="light"] .nav-item.open .nav-top { color: #1a202c; }
[data-theme="light"] .nav-item.open .nav-top { color: #0099bb; }
[data-theme="light"] .nav-sub { background: #fff; }

/* ===== 二级导航：移动端手风琴 ===== */
.mobile-nav { justify-content: flex-start; overflow-y: auto; padding: 108px 24px 60px; gap: 16px; }
.m-group { text-align: center; width: 100%; }
.m-head {
  display: inline-flex; align-items: center; gap: 6px;
  font-size: 20px; font-weight: 800; color: rgba(255,255,255,0.85);
  cursor: pointer; padding: 4px 14px; user-select: none;
}
.m-head .caret { font-size: 12px; color: var(--text-muted); display: inline-block; transition: transform .25s; }
.m-group.open .m-head .caret { transform: rotate(180deg); }
.m-sub { display: none; flex-direction: column; gap: 4px; margin-top: 10px; }
.m-group.open .m-sub { display: flex; animation: fadeIn .2s ease; }
.m-sub .m-link {
  font-size: 16px; color: var(--text-muted); text-decoration: none;
  padding: 6px 14px; border-radius: 8px; transition: all .2s;
}
.m-sub .m-link:hover, .m-sub .m-link.active { color: #00d4ff; background: rgba(0,212,255,0.08); }
[data-theme="light"] .m-head { color: rgba(26,32,44,0.85); }

/* ===== 二级导航：当前业务线高亮（不展开） ===== */
.nav-item.active > .nav-top { color: #00d4ff; }
.nav-item.active > .nav-top::after { width: 60%; }
[data-theme="light"] .nav-item.active > .nav-top { color: #0099bb; }