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

:root {
  --bg: #FDF8F2;
  --bg-alt: #FFF2E8;
  --primary: #FF5A3C;
  --primary-soft: rgba(255, 90, 60, 0.08);
  --secondary: #2EC4B6;
  --secondary-soft: rgba(46, 196, 182, 0.08);
  --accent: #FFB800;
  --accent-soft: rgba(255, 184, 0, 0.1);
  --ink: #1E1E24;
  --ink-soft: #5A5A6E;
  --card: #FFFFFF;
  --border: #F0E5DA;
  --shadow: 0 8px 32px rgba(30, 30, 36, 0.07);
  --shadow-lg: 0 16px 48px rgba(30, 30, 36, 0.1);
  --radius: 20px;
  --radius-lg: 28px;
  --pill: 50px;
}

body {
  font-family: system-ui, 'PingFang SC', 'Microsoft YaHei', sans-serif;
  overflow-x: hidden;
  background: var(--bg);
  color: var(--ink);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

/* ===== 容器与布局 ===== */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

.section {
  padding: 96px 0;
  position: relative;
}

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

/* ===== 导航 ===== */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 1000;
  background: rgba(253, 248, 242, 0.92);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border);
  box-shadow: 0 2px 20px rgba(30, 30, 36, 0.03);
}

.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(--ink);
  letter-spacing: -0.02em;
}

.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;
  font-weight: 900;
  box-shadow: 0 4px 12px rgba(255, 90, 60, 0.25);
}

.main-nav {
  display: flex;
  align-items: center;
  gap: 4px;
  list-style: none;
}

.main-nav a {
  text-decoration: none;
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--ink-soft);
  padding: 8px 16px;
  border-radius: 12px;
  transition: all 0.25s ease;
}

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

.nav-cta {
  padding: 10px 24px !important;
  border-radius: var(--pill) !important;
  background: var(--primary);
  color: #fff !important;
  font-weight: 700;
  box-shadow: 0 4px 16px rgba(255, 90, 60, 0.25);
  margin-left: 12px;
}

.nav-cta:hover {
  background: #e64e32 !important;
  transform: translateY(-1px);
  box-shadow: 0 6px 20px rgba(255, 90, 60, 0.35);
}

.menu-toggle {
  display: none;
  background: none;
  border: none;
  font-size: 1.5rem;
  cursor: pointer;
  color: var(--ink);
  width: 44px;
  height: 44px;
  align-items: center;
  justify-content: center;
  border-radius: 12px;
  background: var(--bg-alt);
}

.menu-toggle:hover {
  background: var(--primary-soft);
}

/* ===== Hero ===== */
.hero {
  min-height: 85vh;
  display: flex;
  align-items: center;
  position: relative;
  background:
    radial-gradient(circle at 90% 20%, rgba(255, 90, 60, 0.08) 0%, transparent 40%),
    radial-gradient(circle at 10% 85%, rgba(46, 196, 182, 0.08) 0%, transparent 40%);
  padding-top: 72px;
}

.hero::before {
  content: '';
  position: absolute;
  right: -80px;
  top: 30%;
  width: 360px;
  height: 360px;
  border-radius: 50%;
  border: 2px dashed rgba(255, 90, 60, 0.3);
  pointer-events: none;
}

.hero::after {
  content: '';
  position: absolute;
  left: -120px;
  bottom: 10%;
  width: 240px;
  height: 240px;
  border-radius: 50%;
  background: var(--secondary-soft);
  filter: blur(60px);
  pointer-events: none;
}

.hero-content {
  max-width: 720px;
  position: relative;
  z-index: 2;
}

.hero-eyebrow {
  display: inline-block;
  font-size: 0.85rem;
  font-weight: 800;
  padding: 6px 18px;
  border-radius: var(--pill);
  background: var(--primary);
  color: #fff;
  margin-bottom: 20px;
  letter-spacing: 0.02em;
  box-shadow: 0 4px 12px rgba(255, 90, 60, 0.2);
}

.hero h1 {
  font-size: 3.6rem;
  line-height: 1.12;
  margin-bottom: 24px;
  font-weight: 900;
  letter-spacing: -0.03em;
  color: var(--ink);
}

.hero h1::after {
  content: '';
  display: block;
  width: 100px;
  height: 8px;
  background: linear-gradient(90deg, var(--primary), var(--accent));
  border-radius: 4px;
  margin-top: 20px;
}

.hero p {
  font-size: 1.15rem;
  opacity: 0.7;
  max-width: 560px;
  margin-bottom: 36px;
  color: var(--ink-soft);
  line-height: 1.7;
}

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

.hero-image {
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-lg);
  transform: rotate(3deg);
  border: 6px solid #fff;
  position: relative;
  z-index: 1;
}

.hero-image img {
  width: 100%;
  height: auto;
  display: block;
}

/* ===== 按钮 ===== */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 14px 32px;
  border-radius: var(--pill);
  font-weight: 700;
  font-size: 0.95rem;
  cursor: pointer;
  border: none;
  text-decoration: none;
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  letter-spacing: 0.01em;
}

.btn:active {
  transform: scale(0.97);
}

.btn-primary {
  background: var(--primary);
  color: #fff;
  box-shadow: 0 8px 24px rgba(255, 90, 60, 0.3);
}

.btn-primary:hover {
  background: #e64e32;
  transform: translateY(-2px);
  box-shadow: 0 12px 32px rgba(255, 90, 60, 0.4);
}

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

.btn-outline:hover {
  border-color: var(--primary);
  color: var(--primary);
  background: var(--primary-soft);
  transform: translateY(-2px);
}

/* ===== 标签/标题 ===== */
.section-label {
  display: inline-block;
  font-size: 0.8rem;
  font-weight: 800;
  letter-spacing: 3px;
  text-transform: uppercase;
  margin-bottom: 14px;
  color: var(--primary);
  background: var(--primary-soft);
  padding: 4px 14px;
  border-radius: var(--pill);
}

.section-title {
  font-size: 2.4rem;
  font-weight: 900;
  margin-bottom: 16px;
  letter-spacing: -0.02em;
  line-height: 1.2;
  color: var(--ink);
}

.section-title::after {
  content: '';
  display: block;
  width: 48px;
  height: 5px;
  background: linear-gradient(90deg, var(--secondary), var(--accent));
  border-radius: 3px;
  margin-top: 12px;
}

.section-desc {
  max-width: 600px;
  opacity: 0.7;
  margin-bottom: 48px;
  color: var(--ink-soft);
  font-size: 1.05rem;
  line-height: 1.7;
}

/* ===== 卡片网格 ===== */
.cards-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 28px;
}

.category-card {
  background: var(--card);
  border-radius: var(--radius);
  padding: 32px;
  border: 1px solid var(--border);
  transition: all 0.35s cubic-bezier(0.4, 0, 0.2, 1);
  position: relative;
  overflow: hidden;
}

.category-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 24px;
  right: 24px;
  height: 4px;
  border-radius: 0 0 4px 4px;
  background: linear-gradient(90deg, var(--primary), var(--accent));
  opacity: 0.9;
}

.category-card:nth-child(even)::before {
  background: linear-gradient(90deg, var(--secondary), var(--accent));
}

.category-card:hover {
  transform: translateY(-6px) rotate(-0.5deg);
  box-shadow: var(--shadow-lg);
  border-color: transparent;
}

.card-icon {
  width: 52px;
  height: 52px;
  border-radius: 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 20px;
  font-size: 1.4rem;
  background: linear-gradient(135deg, var(--primary), var(--accent));
  color: #fff;
  box-shadow: 0 4px 16px rgba(255, 90, 60, 0.25);
}

.category-card:nth-child(even) .card-icon {
  background: linear-gradient(135deg, var(--secondary), #5ED4C8);
  box-shadow: 0 4px 16px rgba(46, 196, 182, 0.3);
}

.category-card h3 {
  font-size: 1.15rem;
  font-weight: 800;
  margin-bottom: 8px;
  color: var(--ink);
}

.category-card p {
  font-size: 0.9rem;
  color: var(--ink-soft);
  margin-bottom: 16px;
  line-height: 1.5;
}

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

.card-link::after {
  content: '→';
  transition: transform 0.2s ease;
}

.card-link:hover::after {
  transform: translateX(4px);
}

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

.feature-image {
  border-radius: var(--radius-lg);
  overflow: hidden;
  position: relative;
}

.feature-image::after {
  content: '';
  position: absolute;
  inset: 0;
  border-radius: var(--radius-lg);
  box-shadow: inset 0 0 0 4px rgba(46, 196, 182, 0.2);
}

.feature-image img {
  width: 100%;
  height: auto;
  display: block;
  transition: transform 0.6s ease;
}

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

.feature-text .section-title {
  font-size: 2.1rem;
}

.feature-text .section-title::after {
  background: linear-gradient(90deg, var(--secondary), var(--accent));
}

.feature-list {
  list-style: none;
  margin-top: 8px;
}

.feature-list li {
  padding: 8px 0;
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 0.98rem;
  color: var(--ink-soft);
}

.feature-list li::before {
  content: '✓';
  font-weight: 900;
  color: #fff;
  background: var(--secondary);
  width: 22px;
  height: 22px;
  border-radius: 50%;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 0.7rem;
  flex-shrink: 0;
}

/* ===== 数据条 ===== */
.stats-bar {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 28px;
  text-align: center;
}

.stat-item {
  background: var(--card);
  padding: 36px 24px;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  transition: all 0.3s ease;
  position: relative;
  overflow: hidden;
}

.stat-item::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(circle at 50% 100%, var(--primary-soft) 0%, transparent 60%);
  opacity: 0;
  transition: opacity 0.3s ease;
}

.stat-item:hover::before {
  opacity: 1;
}

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

.stat-number {
  font-size: 3.2rem;
  font-weight: 900;
  color: var(--primary);
  letter-spacing: -0.03em;
  line-height: 1.1;
  position: relative;
  z-index: 1;
}

.stat-item:nth-child(2) .stat-number { color: var(--secondary); }
.stat-item:nth-child(3) .stat-number { color: var(--accent); }
.stat-item:nth-child(4) .stat-number { color: var(--primary); }

.stat-label {
  font-size: 0.95rem;
  opacity: 0.6;
  margin-top: 8px;
  color: var(--ink-soft);
  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: 28px;
}

.content-wall-item {
  background: var(--card);
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid var(--border);
  transition: all 0.35s cubic-bezier(0.4, 0, 0.2, 1);
  position: relative;
}

.content-wall-item::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  z-index: 2;
  background: var(--primary);
}

.content-wall-item:nth-child(2n)::before { background: var(--secondary); }
.content-wall-item:nth-child(3n)::before { background: var(--accent); }

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

.content-wall-item img {
  width: 100%;
  height: 200px;
  object-fit: cover;
  display: block;
  transition: transform 0.6s ease;
}

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

.content-wall-body {
  padding: 24px;
}

.content-wall-body h3 {
  font-size: 1.1rem;
  font-weight: 800;
  margin-bottom: 6px;
  color: var(--ink);
}

.content-wall-body p {
  font-size: 0.9rem;
  color: var(--ink-soft);
  margin-bottom: 12px;
  line-height: 1.5;
}

.content-wall-body .card-link {
  color: var(--primary);
}

/* ===== FAQ ===== */
.faq-list {
  max-width: 800px;
  margin: 0 auto;
}

.faq-item {
  background: var(--card);
  border: 1px solid var(--border);
  border-left: 4px solid var(--primary);
  border-radius: 14px;
  margin-bottom: 12px;
  overflow: hidden;
  box-shadow: 0 2px 8px rgba(30, 30, 36, 0.03);
  transition: all 0.3s ease;
}

.faq-item:nth-child(2n) {
  border-left-color: var(--secondary);
}

.faq-item:nth-child(3n) {
  border-left-color: var(--accent);
}

.faq-item:hover {
  box-shadow: var(--shadow);
}

.faq-item.open {
  box-shadow: var(--shadow);
}

.faq-item .faq-question {
  padding: 20px 24px;
  font-weight: 700;
  display: flex;
  justify-content: space-between;
  align-items: center;
  cursor: pointer;
  font-size: 1rem;
  color: var(--ink);
  transition: color 0.2s ease;
}

.faq-item.open .faq-question {
  color: var(--primary);
}

.faq-item .faq-question::after {
  content: '+';
  font-size: 1.4rem;
  font-weight: 400;
  color: var(--ink-soft);
  transition: transform 0.3s ease;
}

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

.faq-item .faq-answer {
  padding: 0 24px 20px;
  display: none;
  color: var(--ink-soft);
  font-size: 0.95rem;
  line-height: 1.7;
}

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

/* ===== CTA横幅 ===== */
.cta-banner {
  padding: 80px 48px;
  text-align: center;
  border-radius: var(--radius-lg);
  background: linear-gradient(135deg, var(--primary) 0%, #FF7A55 50%, var(--accent) 100%);
  color: #fff;
  position: relative;
  overflow: hidden;
  box-shadow: 0 20px 60px rgba(255, 90, 60, 0.35);
}

.cta-banner::before {
  content: '';
  position: absolute;
  width: 320px;
  height: 320px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.12);
  top: -100px;
  right: -80px;
}

.cta-banner::after {
  content: '';
  position: absolute;
  width: 200px;
  height: 200px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.08);
  bottom: -70px;
  left: -50px;
}

.cta-banner h2 {
  color: #fff;
  font-size: 2.2rem;
  font-weight: 900;
  margin-bottom: 12px;
  letter-spacing: -0.02em;
  position: relative;
  z-index: 1;
}

.cta-banner p {
  color: rgba(255, 255, 255, 0.9);
  font-size: 1.05rem;
  margin-bottom: 32px;
  position: relative;
  z-index: 1;
  max-width: 500px;
  margin-left: auto;
  margin-right: auto;
}

.cta-banner .btn-primary {
  background: #fff;
  color: var(--primary);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.15);
  position: relative;
  z-index: 1;
}

.cta-banner .btn-primary:hover {
  transform: translateY(-2px) scale(1.02);
  box-shadow: 0 12px 32px rgba(0, 0, 0, 0.2);
}

/* ===== 页脚 ===== */
.site-footer {
  background: var(--bg-alt);
  padding: 72px 0 32px;
  border-top: 2px solid #FFE8D8;
}

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

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

.footer-brand p {
  color: var(--ink-soft);
  font-size: 0.92rem;
  line-height: 1.7;
  max-width: 320px;
}

.footer-col h4 {
  font-size: 1rem;
  font-weight: 800;
  margin-bottom: 20px;
  color: var(--ink);
}

.footer-col a {
  color: var(--ink-soft);
  text-decoration: none;
  font-size: 0.9rem;
  display: block;
  padding: 5px 0;
  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(--ink-soft);
}

/* ===== 工具类 ===== */
.text-accent {
  color: var(--primary);
  font-weight: 700;
}

.text-accent--secondary {
  color: var(--secondary);
}

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

.seo-description {
  max-width: 600px;
  margin: 0 auto 48px;
  opacity: 0.7;
  color: var(--ink-soft);
  text-align: center;
  line-height: 1.7;
}

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

/* ===== 响应式 ===== */
@media (max-width: 992px) {
  .hero h1 {
    font-size: 2.8rem;
  }

  .hero-image {
    transform: rotate(1deg);
  }

  .feature-block {
    gap: 40px;
  }

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

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

  .cta-banner {
    padding: 56px 32px;
  }
}

@media (max-width: 768px) {
  .section {
    padding: 72px 0;
  }

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

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

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

  .main-nav {
    display: none;
    flex-direction: column;
    position: absolute;
    top: 72px;
    left: 0;
    width: 100%;
    background: var(--bg);
    padding: 24px;
    border-bottom: 1px solid var(--border);
    box-shadow: 0 16px 40px rgba(30, 30, 36, 0.08);
    gap: 8px;
  }

  .main-nav.open {
    display: flex;
  }

  .main-nav a {
    padding: 14px 16px;
    font-size: 1rem;
    border-radius: 12px;
  }

  .nav-cta {
    margin-left: 0;
    text-align: center;
  }

  .menu-toggle {
    display: flex;
  }

  .hero {
    min-height: auto;
    padding: 120px 0 64px;
  }

  .hero-content {
    max-width: 100%;
  }

  .hero h1 {
    font-size: 2.4rem;
  }

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

  .hero-image {
    margin-top: 32px;
    display: none;
  }

  .section-title {
    font-size: 2rem;
  }

  .card-link {
    font-size: 0.95rem;
  }

  .cta-banner h2 {
    font-size: 1.8rem;
  }

  .stat-number {
    font-size: 2.4rem;
  }
}

@media (max-width: 480px) {
  .cards-grid,
  .content-wall,
  .stats-bar {
    grid-template-columns: 1fr;
  }

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

  .hero-buttons {
    flex-direction: column;
  }

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

  .hero h1 {
    font-size: 2rem;
  }

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

  .section-label {
    font-size: 0.72rem;
  }

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

  .cta-banner h2 {
    font-size: 1.5rem;
  }

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

  .logo {
    font-size: 1.05rem;
  }

  .logo-icon {
    width: 34px;
    height: 34px;
    font-size: 0.9rem;
  }

  .header-inner {
    padding: 0 16px;
  }
}