:root {
  --primary: #ff6b35;
  --primary-dark: #ef5521;
  --secondary: #2e7dd6;
  --secondary-dark: #1e65bb;
  --accent: #ffd166;
  --accent-soft: #fff3d6;
  --bg: #faf6f0;
  --bg-soft: #f0e9e1;
  --text: #2d3436;
  --text-light: #6f7a85;
  --white: #ffffff;
  --radius: 20px;
  --radius-sm: 12px;
  --shadow-sm: 0 2px 8px rgba(0,0,0,0.04);
  --shadow-md: 0 8px 30px rgba(0,0,0,0.08);
  --shadow-lg: 0 24px 60px rgba(0,0,0,0.10);
  --transition: all 0.35s cubic-bezier(0.22, 0.61, 0.36, 1);
}

/* 基础重置 */
*, *::before, *::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  font-family: system-ui, 'PingFang SC', 'Microsoft YaHei', sans-serif;
  overflow-x: hidden;
  background: var(--bg);
  color: var(--text);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

::selection {
  background: var(--primary);
  color: #fff;
}

a {
  color: inherit;
}

img {
  display: block;
  max-width: 100%;
}

/* 核心布局 */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

.section {
  padding: 90px 0;
  position: relative;
}

.section:nth-child(even) {
  background: var(--bg-soft);
}

/* 导航 */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 1000;
  background: rgba(250, 246, 240, 0.92);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid rgba(0, 0, 0, 0.04);
  transition: box-shadow 0.35s ease;
}

.site-header:hover {
  box-shadow: var(--shadow-sm);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 800;
  font-size: 1.25rem;
  text-decoration: none;
  color: var(--text);
  letter-spacing: -0.01em;
  transition: opacity 0.2s;
}

.logo:hover {
  opacity: 0.85;
}

.logo-icon {
  width: 38px;
  height: 38px;
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1rem;
  background: linear-gradient(135deg, var(--primary), var(--accent));
  color: #fff;
  box-shadow: 0 4px 12px rgba(255, 107, 53, 0.25);
  position: relative;
}

.logo-icon::after {
  content: '';
  position: absolute;
  inset: 3px;
  border-radius: 9px;
  border: 1px solid rgba(255, 255, 255, 0.25);
  pointer-events: none;
}

.main-nav {
  display: flex;
  align-items: center;
  gap: 28px;
  list-style: none;
}

.main-nav a {
  text-decoration: none;
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--text);
  position: relative;
  padding: 6px 2px;
  transition: color 0.25s;
}

.main-nav a::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 0;
  height: 2.5px;
  background: var(--primary);
  border-radius: 2px;
  transition: width 0.3s ease;
}

.main-nav a:hover {
  color: var(--primary);
}

.main-nav a:hover::after {
  width: 100%;
}

.nav-cta {
  padding: 10px 24px;
  border-radius: 50px;
  background: var(--primary);
  color: #fff !important;
  font-weight: 600 !important;
  box-shadow: 0 4px 16px rgba(255, 107, 53, 0.3);
  transition: all 0.3s ease;
}

.nav-cta::after {
  display: none;
}

.nav-cta:hover {
  background: var(--primary-dark);
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(255, 107, 53, 0.35);
  color: #fff !important;
}

.menu-toggle {
  display: none;
  width: 42px;
  height: 42px;
  border: none;
  background: rgba(0, 0, 0, 0.04);
  border-radius: 10px;
  cursor: pointer;
  align-items: center;
  justify-content: center;
  position: relative;
  transition: background 0.2s;
}

.menu-toggle:hover {
  background: rgba(0, 0, 0, 0.08);
}

.menu-toggle::before {
  content: '';
  width: 18px;
  height: 2px;
  background: var(--text);
  border-radius: 2px;
  box-shadow: 0 -6px 0 var(--text), 0 6px 0 var(--text);
}

/* Hero */
.hero {
  min-height: 85vh;
  display: flex;
  align-items: center;
  position: relative;
  overflow: hidden;
  padding: 120px 0 80px;
  background: var(--bg);
}

.hero::before {
  content: '';
  position: absolute;
  top: -120px;
  right: -80px;
  width: 460px;
  height: 460px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(46, 125, 214, 0.10) 0%, transparent 70%);
  pointer-events: none;
  z-index: 1;
}

.hero::after {
  content: '';
  position: absolute;
  bottom: 60px;
  left: -30px;
  width: 260px;
  height: 180px;
  background-image: radial-gradient(circle, rgba(255, 107, 53, 0.14) 2px, transparent 2.5px);
  background-size: 22px 22px;
  pointer-events: none;
  z-index: 1;
}

.hero-content {
  max-width: 760px;
  position: relative;
  z-index: 2;
}

.hero-eyebrow {
  display: inline-block;
  font-size: 0.82rem;
  font-weight: 700;
  padding: 6px 18px;
  border-radius: 50px;
  margin-bottom: 20px;
  background: var(--accent-soft);
  color: var(--primary);
  letter-spacing: 0.5px;
  position: relative;
}

.hero-eyebrow::after {
  content: '';
  position: absolute;
  bottom: -8px;
  left: 22px;
  width: 0;
  height: 0;
  border-left: 7px solid transparent;
  border-right: 7px solid transparent;
  border-top: 8px solid var(--accent-soft);
}

.hero h1 {
  font-size: 3.4rem;
  line-height: 1.15;
  margin-bottom: 16px;
  font-weight: 800;
  letter-spacing: -0.02em;
  color: var(--text);
}

.hero p {
  font-size: 1.1rem;
  opacity: 0.75;
  max-width: 560px;
  margin-bottom: 36px;
  color: var(--text-light);
  border-left: 4px solid var(--primary);
  padding-left: 18px;
  line-height: 1.75;
}

.hero-buttons {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}

.hero-image {
  border-radius: 24px;
  overflow: hidden;
  position: relative;
  box-shadow: var(--shadow-lg);
}

.hero-image::before {
  content: '';
  position: absolute;
  top: -14px;
  right: -14px;
  width: 100%;
  height: 100%;
  border: 3px solid var(--secondary);
  border-radius: 24px;
  z-index: -1;
  opacity: 0.5;
}

.hero-image img {
  width: 100%;
  height: auto;
  object-fit: cover;
  transition: transform 0.6s ease;
}

.hero-image:hover img {
  transform: scale(1.02);
}

/* 按钮 */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 14px 30px;
  border-radius: 50px;
  font-weight: 600;
  font-size: 0.95rem;
  cursor: pointer;
  border: none;
  text-decoration: none;
  transition: var(--transition);
  letter-spacing: 0.02em;
}

.btn-primary {
  background: linear-gradient(135deg, var(--primary), #ff8c5a);
  color: #fff;
  box-shadow: 0 6px 20px rgba(255, 107, 53, 0.3);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 10px 30px rgba(255, 107, 53, 0.4);
}

.btn-outline {
  background: transparent;
  border: 2px solid var(--secondary);
  color: var(--secondary);
}

.btn-outline:hover {
  background: var(--secondary);
  color: #fff;
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(46, 125, 214, 0.25);
}

/* 标签/标题 */
.section-label {
  display: inline-block;
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 3px;
  margin-bottom: 14px;
  text-transform: uppercase;
  color: var(--primary);
  background: var(--accent-soft);
  padding: 5px 16px;
  border-radius: 50px;
}

.section-title {
  font-size: 2.3rem;
  font-weight: 800;
  margin-bottom: 14px;
  color: var(--text);
  letter-spacing: -0.01em;
  position: relative;
  display: inline-block;
}

.section-title::after {
  content: '';
  position: absolute;
  bottom: -6px;
  left: 0;
  width: 52px;
  height: 5px;
  background: var(--primary);
  border-radius: 4px;
}

.section-desc {
  max-width: 640px;
  opacity: 0.7;
  margin-bottom: 48px;
  color: var(--text-light);
  font-size: 1.05rem;
}

/* 卡片网格 */
.cards-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 26px;
}

.category-card {
  border-radius: var(--radius);
  padding: 30px 28px;
  border: 1px solid rgba(0, 0, 0, 0.05);
  background: var(--white);
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}

.category-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 4px;
  background: linear-gradient(90deg, var(--primary), var(--accent));
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.4s ease;
}

.category-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-md);
  border-color: rgba(255, 107, 53, 0.15);
}

.category-card:hover::before {
  transform: scaleX(1);
}

.card-icon {
  width: 52px;
  height: 52px;
  border-radius: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 18px;
  font-size: 1.4rem;
  background: linear-gradient(135deg, var(--accent-soft), #ffe8d6);
  color: var(--primary);
}

.card-link {
  font-weight: 700;
  font-size: 0.85rem;
  text-decoration: none;
  color: var(--primary);
  display: inline-flex;
  align-items: center;
  gap: 4px;
  transition: gap 0.25s ease;
}

.card-link:hover {
  gap: 8px;
}

/* 特性块 */
.feature-block {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
}

.feature-image {
  border-radius: 24px;
  overflow: hidden;
  position: relative;
  box-shadow: var(--shadow-md);
}

.feature-image::after {
  content: '';
  position: absolute;
  bottom: -16px;
  left: -16px;
  width: 60px;
  height: 60px;
  border-radius: 50%;
  background: var(--accent);
  opacity: 0.3;
  z-index: 0;
}

.feature-image img {
  width: 100%;
  height: auto;
  object-fit: cover;
  transition: transform 0.6s ease;
}

.feature-image:hover img {
  transform: scale(1.03);
}

.feature-text {
  padding-left: 8px;
}

.feature-text .section-title {
  margin-bottom: 20px;
}

.feature-list {
  list-style: none;
  margin-top: 24px;
}

.feature-list li {
  padding: 9px 0;
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 1rem;
  color: var(--text);
}

.feature-list li::before {
  content: '✓';
  font-weight: 800;
  color: var(--primary);
  flex-shrink: 0;
  width: 24px;
  height: 24px;
  border-radius: 50%;
  background: var(--accent-soft);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.8rem;
}

/* 数据条 */
.stats-bar {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 26px;
  text-align: center;
}

.stat-item {
  padding: 36px 24px;
  border-radius: var(--radius);
  border: 1px solid rgba(0, 0, 0, 0.04);
  background: var(--white);
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}

.stat-item::after {
  content: '';
  position: absolute;
  bottom: -20px;
  right: -20px;
  width: 80px;
  height: 80px;
  border-radius: 50%;
  background: var(--accent-soft);
  opacity: 0.6;
  transition: transform 0.4s ease;
}

.stat-item:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
}

.stat-item:hover::after {
  transform: scale(1.5);
}

.stat-number {
  font-size: 2.6rem;
  font-weight: 800;
  color: var(--primary);
  line-height: 1.2;
  letter-spacing: -0.02em;
  position: relative;
  z-index: 1;
}

.stat-label {
  font-size: 0.9rem;
  opacity: 0.6;
  margin-top: 8px;
  color: var(--text-light);
  position: relative;
  z-index: 1;
  font-weight: 500;
}

/* 内容墙 */
.content-wall {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 26px;
}

.content-wall-item {
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid rgba(0, 0, 0, 0.04);
  background: var(--white);
  transition: var(--transition);
}

.content-wall-item:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-md);
}

.content-wall-item img {
  width: 100%;
  height: 200px;
  object-fit: cover;
  transition: transform 0.5s ease;
}

.content-wall-item:hover img {
  transform: scale(1.05);
}

.content-wall-body {
  padding: 22px;
}

.content-wall-body h3 {
  font-size: 1.05rem;
  font-weight: 700;
  margin-bottom: 6px;
}

.content-wall-body p {
  font-size: 0.85rem;
  color: var(--text-light);
  opacity: 0.8;
}

/* FAQ */
.faq-list {
  max-width: 820px;
  margin: 0 auto;
}

.faq-item {
  border: 1px solid rgba(0, 0, 0, 0.05);
  border-radius: 18px;
  margin-bottom: 12px;
  overflow: hidden;
  cursor: pointer;
  background: var(--white);
  transition: var(--transition);
}

.faq-item:hover {
  border-color: rgba(255, 107, 53, 0.25);
  box-shadow: var(--shadow-sm);
}

.faq-item.open {
  border-color: rgba(255, 107, 53, 0.2);
  box-shadow: var(--shadow-md);
}

.faq-item .faq-question {
  padding: 18px 24px;
  font-weight: 600;
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 1rem;
  color: var(--text);
  transition: color 0.2s;
}

.faq-question::after {
  content: '+';
  font-size: 1.5rem;
  font-weight: 300;
  color: var(--primary);
  transition: transform 0.35s cubic-bezier(0.22, 0.61, 0.36, 1);
  flex-shrink: 0;
  margin-left: 16px;
  line-height: 1;
}

.faq-item.open .faq-question::after {
  transform: rotate(45deg);
}

.faq-item .faq-answer {
  padding: 0 24px 18px;
  display: none;
  opacity: 0;
  color: var(--text-light);
  font-size: 0.95rem;
  line-height: 1.7;
  transition: opacity 0.35s ease;
}

.faq-item.open .faq-answer {
  display: block;
  opacity: 0.75;
}

/* CTA横幅 */
.cta-banner {
  padding: 64px 40px;
  text-align: center;
  border-radius: 28px;
  color: #fff;
  background: linear-gradient(135deg, var(--primary) 0%, #ff8c5a 60%, var(--accent) 120%);
  position: relative;
  overflow: hidden;
  box-shadow: 0 20px 60px rgba(255, 107, 53, 0.3);
}

.cta-banner::before {
  content: '';
  position: absolute;
  top: -40px;
  right: -20px;
  width: 180px;
  height: 180px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.1);
  pointer-events: none;
}

.cta-banner::after {
  content: '';
  position: absolute;
  bottom: -60px;
  left: -40px;
  width: 200px;
  height: 200px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.08);
  pointer-events: none;
}

.cta-banner h2 {
  color: #fff;
  font-size: 2rem;
  font-weight: 800;
  margin-bottom: 12px;
  position: relative;
  z-index: 1;
}

.cta-banner p {
  color: rgba(255, 255, 255, 0.9);
  max-width: 500px;
  margin: 0 auto 28px;
  position: relative;
  z-index: 1;
  font-size: 1.05rem;
}

.cta-banner .btn-primary {
  background: #fff;
  color: var(--primary);
  box-shadow: 0 6px 24px rgba(0, 0, 0, 0.15);
  position: relative;
  z-index: 1;
}

.cta-banner .btn-primary:hover {
  transform: translateY(-3px);
  box-shadow: 0 12px 32px rgba(0, 0, 0, 0.2);
}

/* 页脚 */
.site-footer {
  padding: 64px 0 28px;
  background: var(--bg-soft);
  position: relative;
}

.site-footer::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 4px;
  background: linear-gradient(90deg, var(--primary), var(--accent), var(--secondary));
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 48px;
}

.footer-brand {
  padding-right: 40px;
}

.footer-brand .logo {
  margin-bottom: 16px;
}

.footer-brand p {
  font-size: 0.9rem;
  color: var(--text-light);
  line-height: 1.7;
  opacity: 0.85;
}

.footer-col {
  display: flex;
  flex-direction: column;
}

.footer-col h4 {
  font-size: 0.95rem;
  font-weight: 700;
  margin-bottom: 18px;
  color: var(--text);
  letter-spacing: 0.5px;
}

.footer-col a {
  display: block;
  padding: 6px 0;
  color: var(--text-light);
  text-decoration: none;
  font-size: 0.9rem;
  transition: color 0.2s ease, transform 0.2s ease;
}

.footer-col a:hover {
  color: var(--primary);
  transform: translateX(4px);
}

.footer-bottom {
  border-top: 1px solid rgba(0, 0, 0, 0.06);
  margin-top: 48px;
  padding-top: 24px;
  text-align: center;
  font-size: 0.85rem;
  color: var(--text-light);
  opacity: 0.7;
}

/* 工具类 */
.text-accent {
  color: var(--primary);
}

.text-center {
  text-align: center;
}

.seo-description {
  max-width: 620px;
  margin: 0 auto 48px;
  opacity: 0.7;
  color: var(--text-light);
  text-align: center;
  font-size: 1rem;
  line-height: 1.8;
}

.mt-0 {
  margin-top: 0 !important;
}

.mb-0 {
  margin-bottom: 0 !important;
}

/* 响应式 */
@media (max-width: 768px) {
  .section {
    padding: 60px 0;
  }

  .hero {
    min-height: auto;
    padding: 100px 0 60px;
  }

  .hero h1 {
    font-size: 2.2rem;
  }

  .hero p {
    font-size: 1rem;
  }

  .feature-block {
    grid-template-columns: 1fr;
    gap: 36px;
  }

  .feature-text {
    padding-left: 0;
  }

  .stats-bar {
    grid-template-columns: repeat(2, 1fr);
    gap: 16px;
  }

  .footer-grid {
    grid-template-columns: 1fr 1fr;
    gap: 32px;
  }

  .footer-brand {
    grid-column: 1 / -1;
    padding-right: 0;
  }

  .main-nav {
    display: none;
  }

  .menu-toggle {
    display: flex;
  }

  .main-nav.open {
    display: flex;
    flex-direction: column;
    position: absolute;
    top: 72px;
    left: 0;
    width: 100%;
    background: var(--bg);
    padding: 24px;
    gap: 16px;
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.08);
    border-bottom: 1px solid rgba(0, 0, 0, 0.04);
  }

  .main-nav.open a {
    font-size: 1rem;
    padding: 10px 0;
  }

  .main-nav.open .nav-cta {
    text-align: center;
    margin-top: 8px;
  }

  .cta-banner {
    padding: 48px 24px;
  }

  .cta-banner h2 {
    font-size: 1.6rem;
  }
}

@media (max-width: 480px) {
  .container {
    padding: 0 18px;
  }

  .hero h1 {
    font-size: 1.9rem;
  }

  .hero-buttons {
    flex-direction: column;
    width: 100%;
  }

  .hero-buttons .btn {
    width: 100%;
    justify-content: center;
  }

  .cards-grid,
  .content-wall,
  .stats-bar {
    grid-template-columns: 1fr;
  }

  .footer-grid {
    grid-template-columns: 1fr;
  }

  .section-title {
    font-size: 1.7rem;
  }

  .stat-item {
    padding: 24px 20px;
  }

  .stat-number {
    font-size: 2rem;
  }

  .faq-item .faq-question {
    font-size: 0.95rem;
    padding: 16px 18px;
  }

  .faq-item .faq-answer {
    padding: 0 18px 16px;
  }

  .cta-banner h2 {
    font-size: 1.4rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    transition: none !important;
    animation: none !important;
  }
}