*, *::before, *::after { margin:0; padding:0; box-sizing:border-box; }

:root {
  --coral: #FF6B4A;
  --coral-soft: #FFB09A;
  --coral-bg: #FFF0EA;
  --mint: #2EC4B6;
  --mint-soft: #A8E6DF;
  --mint-bg: #E8F8F6;
  --sun: #FFD166;
  --dark: #2D2A26;
  --dark-soft: #6B6560;
  --cream: #FDF8F2;
  --white: #FFFFFF;
  --shadow-sm: 0 2px 12px rgba(45,42,38,0.05);
  --shadow-md: 0 8px 32px rgba(45,42,38,0.08);
  --shadow-lg: 0 20px 60px rgba(45,42,38,0.10);
  --radius-lg: 28px;
  --radius-md: 18px;
  --radius-sm: 12px;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: system-ui, 'PingFang SC', 'Microsoft YaHei', sans-serif;
  overflow-x: hidden;
  background-color: var(--cream);
  background-image: radial-gradient(rgba(255,107,74,0.04) 1px, transparent 1px);
  background-size: 28px 28px;
  color: var(--dark);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

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

::-webkit-scrollbar { width: 10px; }
::-webkit-scrollbar-track { background: var(--cream); }
::-webkit-scrollbar-thumb { background: var(--coral-soft); border-radius: 20px; }
::-webkit-scrollbar-thumb:hover { background: var(--coral); }

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

.section {
  padding: 80px 0;
  position: relative;
}

.section:nth-child(even) {
  background: rgba(46,196,182,0.05);
}

/* ===== 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(20px) saturate(1.4);
  -webkit-backdrop-filter: blur(20px) saturate(1.4);
  border-bottom: 1px solid rgba(255,107,74,0.12);
  transition: box-shadow 0.3s;
}

.site-header:hover {
  box-shadow: 0 4px 24px rgba(255,107,74,0.06);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 68px;
  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(--dark);
  letter-spacing: -0.02em;
}

.logo-icon {
  width: 38px;
  height: 38px;
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.1rem;
  background: linear-gradient(135deg, var(--coral), var(--sun));
  color: #fff;
  box-shadow: 0 4px 14px rgba(255,107,74,0.35);
  transform: rotate(-8deg);
  transition: transform 0.3s;
}

.logo:hover .logo-icon {
  transform: rotate(0deg) scale(1.05);
}

.main-nav {
  display: flex;
  align-items: center;
  gap: 30px;
  list-style: none;
}

.main-nav a {
  position: relative;
  text-decoration: none;
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--dark);
  transition: color 0.3s;
  padding: 4px 0;
}

.main-nav a::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--coral);
  border-radius: 4px;
  transition: width 0.35s cubic-bezier(0.25,1,0.5,1);
}

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

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

.nav-cta {
  background: linear-gradient(135deg, var(--coral), #FF8A65);
  color: #fff !important;
  padding: 8px 22px !important;
  border-radius: 50px;
  font-weight: 600;
  font-size: 0.85rem !important;
  box-shadow: 0 4px 16px rgba(255,107,74,0.35);
  transition: all 0.3s !important;
}

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

.nav-cta:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 28px rgba(255,107,74,0.45);
}

.menu-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  width: 40px;
  height: 40px;
  align-items: center;
  justify-content: center;
  background: transparent;
  border: none;
  cursor: pointer;
  border-radius: 8px;
}

.menu-toggle span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--dark);
  border-radius: 4px;
  transition: 0.3s;
}

.menu-toggle:hover span {
  background: var(--coral);
}

/* ===== Hero ===== */
.hero {
  min-height: 70vh;
  display: flex;
  align-items: center;
  padding-top: 68px;
  position: relative;
  overflow: hidden;
  background: 
    radial-gradient(ellipse at 80% 20%, rgba(255,107,74,0.08), transparent 60%),
    radial-gradient(ellipse at 20% 90%, rgba(46,196,182,0.1), transparent 50%),
    var(--cream);
}

.hero::before {
  content: '';
  position: absolute;
  width: 300px;
  height: 300px;
  border-radius: 50%;
  border: 3px dashed rgba(255,107,74,0.2);
  top: -100px;
  right: -80px;
  animation: spin 30s linear infinite;
}

.hero::after {
  content: '';
  position: absolute;
  width: 160px;
  height: 160px;
  border-radius: 50%;
  background: rgba(255,209,102,0.2);
  bottom: -40px;
  left: 10%;
  filter: blur(2px);
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

.hero .container {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 60px;
  align-items: center;
  width: 100%;
  position: relative;
  z-index: 1;
}

.hero-content {
  max-width: 720px;
}

.hero-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 0.8rem;
  font-weight: 700;
  padding: 6px 18px;
  border-radius: 50px;
  background: linear-gradient(135deg, var(--coral-bg), var(--mint-bg));
  color: var(--coral);
  margin-bottom: 20px;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.hero-eyebrow::before {
  content: '⚡';
  font-size: 0.9rem;
}

.hero h1 {
  font-size: clamp(2.4rem, 5vw, 3.6rem);
  font-weight: 800;
  line-height: 1.12;
  margin-bottom: 20px;
  letter-spacing: -0.03em;
  color: var(--dark);
}

.hero p {
  font-size: 1.05rem;
  opacity: 0.62;
  max-width: 560px;
  margin-bottom: 36px;
  line-height: 1.7;
  color: var(--dark-soft);
}

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

.hero-image {
  border-radius: var(--radius-lg);
  overflow: hidden;
  position: relative;
  box-shadow: var(--shadow-lg);
  background: linear-gradient(135deg, var(--mint-bg), var(--coral-bg));
  transform: rotate(2deg);
  transition: transform 0.4s;
}

.hero-image:hover {
  transform: rotate(0deg) scale(1.01);
}

.hero-image::before {
  content: '✦';
  position: absolute;
  top: 20px;
  right: 24px;
  font-size: 2rem;
  color: var(--white);
  z-index: 1;
  text-shadow: 0 2px 12px rgba(0,0,0,0.1);
}

.hero-image img {
  width: 100%;
  height: 100%;
  min-height: 340px;
  object-fit: cover;
  display: block;
}

/* ===== 按钮 ===== */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 14px 32px;
  border-radius: 50px;
  font-weight: 600;
  font-size: 0.92rem;
  cursor: pointer;
  border: none;
  text-decoration: none;
  transition: all 0.3s cubic-bezier(0.25,1,0.5,1);
  letter-spacing: 0.02em;
}

.btn-primary {
  background: linear-gradient(135deg, var(--coral), #FF8A65);
  color: #fff;
  box-shadow: 0 6px 20px rgba(255,107,74,0.35);
}

.btn-primary:hover {
  transform: translateY(-3px);
  box-shadow: 0 12px 32px rgba(255,107,74,0.45);
}

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

.btn-outline:hover {
  background: var(--mint);
  color: #fff;
  transform: translateY(-3px);
  box-shadow: 0 8px 24px rgba(46,196,182,0.3);
}

/* ===== 标签/标题 ===== */
.section-label {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  margin-bottom: 14px;
  color: var(--coral);
}

.section-label::before {
  content: '';
  width: 24px;
  height: 2px;
  background: var(--coral);
  border-radius: 4px;
  display: inline-block;
}

.section-title {
  font-size: clamp(1.6rem, 3vw, 2.3rem);
  font-weight: 800;
  margin-bottom: 14px;
  letter-spacing: -0.02em;
  line-height: 1.2;
  color: var(--dark);
}

.section-desc {
  max-width: 600px;
  opacity: 0.6;
  margin-bottom: 44px;
  color: var(--dark-soft);
  font-size: 1rem;
  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 {
  border-radius: var(--radius-md);
  padding: 32px 28px;
  background: var(--white);
  border: 1px solid rgba(0,0,0,0.04);
  border-top: 4px solid transparent;
  transition: all 0.35s cubic-bezier(0.25,1,0.5,1);
  box-shadow: var(--shadow-sm);
  position: relative;
  overflow: hidden;
}

.category-card::before {
  content: '';
  position: absolute;
  top: 0;
  right: 0;
  width: 60px;
  height: 60px;
  background: radial-gradient(circle, rgba(255,107,74,0.06) 0%, transparent 70%);
  border-radius: 0 0 0 60px;
  transition: 0.3s;
}

.category-card:nth-child(1) { border-top-color: var(--coral); }
.category-card:nth-child(2) { border-top-color: var(--mint); }
.category-card:nth-child(3) { border-top-color: var(--sun); }
.category-card:nth-child(4) { border-top-color: var(--coral-soft); }

.category-card:hover {
  transform: translateY(-6px) rotate(-0.3deg);
  box-shadow: var(--shadow-md);
}

.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(--coral-bg), var(--mint-bg));
}

.category-card h3 {
  font-size: 1.1rem;
  font-weight: 700;
  margin-bottom: 10px;
  color: var(--dark);
}

.category-card p {
  font-size: 0.9rem;
  color: var(--dark-soft);
  opacity: 0.75;
  margin-bottom: 16px;
  line-height: 1.6;
}

.card-link {
  font-weight: 600;
  font-size: 0.85rem;
  text-decoration: none;
  color: var(--coral);
  display: inline-flex;
  align-items: center;
  gap: 4px;
  transition: gap 0.3s;
}

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

.card-link::after {
  content: '→';
  transition: transform 0.3s;
}

/* ===== 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;
  box-shadow: var(--shadow-md);
}

.feature-image::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, transparent 50%, rgba(255,107,74,0.08));
  z-index: 1;
  pointer-events: none;
}

.feature-image img {
  width: 100%;
  height: 100%;
  min-height: 300px;
  object-fit: cover;
  display: block;
  transition: transform 0.6s;
}

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

.feature-text {
  padding: 20px 0;
}

.feature-text h3 {
  font-size: 1.4rem;
  font-weight: 700;
  margin-bottom: 14px;
  color: var(--dark);
  line-height: 1.3;
}

.feature-text p {
  color: var(--dark-soft);
  opacity: 0.7;
  margin-bottom: 20px;
  line-height: 1.7;
}

.feature-list {
  list-style: none;
  margin-top: 10px;
}

.feature-list li {
  padding: 8px 0;
  display: flex;
  align-items: center;
  gap: 12px;
  font-weight: 500;
  color: var(--dark);
}

.feature-list li::before {
  content: '';
  width: 8px;
  height: 8px;
  background: var(--mint);
  border-radius: 2px;
  transform: rotate(45deg);
  flex-shrink: 0;
  box-shadow: 0 2px 6px rgba(46,196,182,0.3);
}

/* ===== 数据条 ===== */
.stats-bar {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  text-align: center;
}

.stat-item {
  padding: 32px 20px;
  border-radius: var(--radius-md);
  background: var(--white);
  border: none;
  box-shadow: var(--shadow-sm);
  position: relative;
  overflow: hidden;
  transition: all 0.3s;
}

.stat-item::before {
  content: '';
  position: absolute;
  top: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 36px;
  height: 3px;
  background: linear-gradient(90deg, var(--coral), var(--mint));
  border-radius: 0 0 6px 6px;
}

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

.stat-number {
  font-size: 2.6rem;
  font-weight: 800;
  color: var(--coral);
  line-height: 1.1;
  display: block;
  margin-bottom: 8px;
  letter-spacing: -0.03em;
}

.stat-label {
  font-size: 0.88rem;
  opacity: 0.55;
  margin-top: 6px;
  color: var(--dark-soft);
  font-weight: 500;
}

/* ===== 内容墙 ===== */
.content-wall {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 28px;
}

.content-wall-item {
  border-radius: var(--radius-md);
  overflow: hidden;
  background: var(--white);
  border: 1px solid rgba(0,0,0,0.04);
  box-shadow: var(--shadow-sm);
  transition: all 0.35s cubic-bezier(0.25,1,0.5,1);
  position: relative;
}

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

.content-wall-item img {
  width: 100%;
  height: 220px;
  object-fit: cover;
  transition: transform 0.6s;
}

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

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

.content-wall-body h4 {
  font-size: 1.05rem;
  font-weight: 700;
  margin-bottom: 8px;
  color: var(--dark);
}

.content-wall-body p {
  font-size: 0.86rem;
  color: var(--dark-soft);
  opacity: 0.7;
  line-height: 1.6;
}

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

.faq-item {
  border: 1px solid rgba(0,0,0,0.06);
  border-radius: var(--radius-sm);
  margin-bottom: 10px;
  overflow: hidden;
  cursor: pointer;
  background: var(--white);
  transition: all 0.3s;
  box-shadow: var(--shadow-sm);
}

.faq-item:hover {
  border-color: rgba(255,107,74,0.2);
}

.faq-item.open {
  border-color: var(--coral-soft);
  box-shadow: 0 4px 20px rgba(255,107,74,0.08);
}

.faq-item .faq-question {
  padding: 18px 24px;
  font-weight: 600;
  font-size: 0.95rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  color: var(--dark);
}

.faq-item .faq-question::after {
  content: '+';
  font-size: 1.3rem;
  font-weight: 400;
  color: var(--coral);
  transition: transform 0.3s;
  flex-shrink: 0;
}

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

.faq-item .faq-answer {
  padding: 0 24px 18px;
  display: none;
  opacity: 0.65;
  font-size: 0.9rem;
  line-height: 1.7;
  color: var(--dark-soft);
}

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

/* ===== CTA横幅 ===== */
.cta-banner {
  padding: 64px 24px;
  text-align: center;
  border-radius: var(--radius-lg);
  color: #fff;
  background: linear-gradient(135deg, var(--coral) 0%, #FF8A65 50%, var(--sun) 100%);
  position: relative;
  overflow: hidden;
  box-shadow: 0 16px 48px rgba(255,107,74,0.35);
}

.cta-banner::before {
  content: '⚡';
  position: absolute;
  right: 6%;
  top: 50%;
  transform: translateY(-50%);
  font-size: 100px;
  opacity: 0.15;
  color: #fff;
}

.cta-banner::after {
  content: '';
  position: absolute;
  width: 200px;
  height: 200px;
  border-radius: 50%;
  background: rgba(255,255,255,0.08);
  top: -60px;
  left: -60px;
}

.cta-banner h2 {
  color: #fff;
  font-size: clamp(1.5rem, 3vw, 2.2rem);
  font-weight: 800;
  margin-bottom: 16px;
  letter-spacing: -0.02em;
  position: relative;
  z-index: 1;
}

.cta-banner p {
  color: rgba(255,255,255,0.85);
  font-size: 1rem;
  max-width: 500px;
  margin: 0 auto 30px;
  line-height: 1.7;
  position: relative;
  z-index: 1;
}

.cta-banner .btn-primary {
  background: #fff;
  color: var(--coral);
  box-shadow: 0 8px 24px rgba(0,0,0,0.1);
  position: relative;
  z-index: 1;
}

.cta-banner .btn-primary:hover {
  transform: translateY(-3px);
  box-shadow: 0 12px 32px rgba(0,0,0,0.15);
}

/* ===== 页脚 ===== */
.site-footer {
  padding: 64px 0 28px;
  background: #F0EADD;
  border-top: 1px solid rgba(255,107,74,0.08);
}

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

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

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

.footer-brand p {
  font-size: 0.88rem;
  color: var(--dark-soft);
  opacity: 0.6;
  line-height: 1.7;
}

.footer-col h4 {
  font-size: 0.9rem;
  font-weight: 700;
  margin-bottom: 16px;
  color: var(--dark);
  letter-spacing: 0.02em;
}

.footer-col ul {
  list-style: none;
}

.footer-col ul li {
  margin-bottom: 10px;
}

.footer-col ul a {
  text-decoration: none;
  font-size: 0.88rem;
  color: var(--dark-soft);
  opacity: 0.65;
  transition: 0.2s;
}

.footer-col ul a:hover {
  color: var(--coral);
  opacity: 1;
}

.footer-bottom {
  border-top: 1px solid rgba(45,42,38,0.08);
  margin-top: 48px;
  padding-top: 20px;
  text-align: center;
  font-size: 0.82rem;
  color: var(--dark-soft);
  opacity: 0.6;
}

/* ===== 工具类 ===== */
.text-accent {
  color: var(--coral);
  position: relative;
  display: inline-block;
  z-index: 1;
}

.text-accent::after {
  content: '';
  position: absolute;
  bottom: 2px;
  left: 0;
  width: 100%;
  height: 8px;
  background: rgba(255,107,74,0.15);
  border-radius: 8px;
  z-index: -1;
}

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

.seo-description {
  max-width: 600px;
  margin: 0 auto 48px;
  opacity: 0.55;
  font-size: 1rem;
  line-height: 1.7;
  color: var(--dark-soft);
}

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

/* ===== 响应式 ===== */
@media (max-width: 768px) {
  .feature-block {
    grid-template-columns: 1fr;
    gap: 32px;
  }

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

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

  .main-nav {
    display: none;
  }

  .menu-toggle {
    display: flex;
  }

  .main-nav.open {
    display: flex;
    flex-direction: column;
    position: absolute;
    top: 68px;
    left: 0;
    width: 100%;
    background: var(--cream);
    padding: 24px;
    gap: 16px;
    box-shadow: 0 12px 32px rgba(45,42,38,0.1);
    border-bottom: 1px solid rgba(255,107,74,0.08);
  }

  .main-nav.open a {
    font-size: 1rem;
    padding: 10px 0;
    border-bottom: 1px solid rgba(0,0,0,0.04);
  }

  .main-nav.open .nav-cta {
    border-bottom: none;
    text-align: center;
    padding: 12px 24px !important;
  }

  .hero {
    padding-top: 88px;
  }

  .hero .container {
    grid-template-columns: 1fr;
    gap: 40px;
  }

  .hero-image {
    transform: rotate(0deg);
  }

  .hero-image img {
    min-height: 240px;
  }

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

  .section {
    padding: 60px 0;
  }

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

  .cta-banner::before {
    font-size: 60px;
  }

  .faq-item .faq-question {
    font-size: 0.9rem;
    padding: 16px 18px;
  }
}

@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;
    width: 100%;
  }

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

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

  .hero p {
    font-size: 0.95rem;
  }

  .section-title {
    font-size: 1.4rem;
  }

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

  .stat-item {
    padding: 24px 16px;
  }

  .feature-block {
    gap: 24px;
  }

  .cta-banner h2 {
    font-size: 1.3rem;
  }

  .cta-banner p {
    font-size: 0.85rem;
  }

  .footer-bottom {
    font-size: 0.78rem;
  }

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

  .logo {
    font-size: 1.05rem;
  }
}

/* ===== 额外细节 ===== */
.section:last-of-type .container {
  padding-bottom: 20px;
}

.hero-content .hero-eyebrow + h1 {
  margin-top: 4px;
}

.feature-text .btn {
  margin-top: 8px;
}

.stats-bar .stat-item:first-child .stat-number {
  color: var(--coral);
}

.stats-bar .stat-item:nth-child(2) .stat-number {
  color: var(--mint);
}

.stats-bar .stat-item:nth-child(3) .stat-number {
  color: var(--sun);
}

.stats-bar .stat-item:nth-child(4) .stat-number {
  color: #7B68EE;
}

.category-card .card-icon:nth-child(1) {
  background: linear-gradient(135deg, var(--coral-bg), var(--coral-soft));
}

.category-card:nth-child(2) .card-icon {
  background: linear-gradient(135deg, var(--mint-bg), var(--mint-soft));
}

.category-card:nth-child(3) .card-icon {
  background: linear-gradient(135deg, #FFFAE8, #FFE59A);
}

.category-card:nth-child(4) .card-icon {
  background: linear-gradient(135deg, #F0EBFF, #D4C5FF);
}

a:focus-visible {
  outline: 3px solid var(--mint);
  outline-offset: 2px;
  border-radius: 4px;
}

.btn:focus-visible {
  box-shadow: 0 0 0 4px rgba(46,196,182,0.3);
}