/* ============================================================
   9b娱乐 · 「暖橙几何」设计系统
   风格：现代波普 × 几何层叠 × 高饱和度暖色
   配色：暖橙(#FF6B35) + 碧蓝绿(#2EC4B6) + 琥珀金(#FFD700)
   背景：暖白(#FFFBF5)
   ============================================================ */

/* 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: #FFFBF5;
  color: #1A1A2E;
  line-height: 1.6;
}

::selection {
  background: #FF6B35;
  color: #fff;
}

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

.section {
  padding: 100px 0;
  position: relative;
}

.section:nth-child(even) {
  background: linear-gradient(135deg, #FFF8F0 0%, #FFF0E5 100%);
}

/* 几何装饰 — 圆点 + 斜线 */
.section::before {
  content: '';
  position: absolute;
  width: 180px;
  height: 180px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(255, 107, 53, 0.08) 0%, transparent 70%);
  pointer-events: none;
  z-index: 0;
}

.section:nth-child(odd)::before {
  top: -60px;
  right: -40px;
}

.section:nth-child(even)::before {
  bottom: -60px;
  left: -40px;
}

.section > .container {
  position: relative;
  z-index: 1;
}

/* ===== 导航 ===== */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 1000;
  background: rgba(255, 251, 245, 0.92);
  backdrop-filter: blur(14px);
  border-bottom: 1px solid rgba(255, 107, 53, 0.15);
  transition: box-shadow 0.3s;
}

.site-header:hover {
  box-shadow: 0 2px 24px rgba(255, 107, 53, 0.06);
}

.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: 1.35rem;
  text-decoration: none;
  color: #1A1A2E;
  letter-spacing: -0.3px;
}

.logo-icon {
  width: 40px;
  height: 40px;
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.2rem;
  background: linear-gradient(135deg, #FF6B35, #FF8F65);
  color: #fff;
  box-shadow: 0 4px 12px rgba(255, 107, 53, 0.3);
}

.main-nav {
  display: flex;
  align-items: center;
  gap: 32px;
  list-style: none;
}

.main-nav a {
  text-decoration: none;
  font-size: 0.9rem;
  font-weight: 600;
  color: #3D3D5C;
  transition: color 0.25s, transform 0.25s;
  position: relative;
  padding: 4px 0;
}

.main-nav a::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 0;
  height: 2.5px;
  background: linear-gradient(90deg, #FF6B35, #2EC4B6);
  border-radius: 2px;
  transition: width 0.3s ease;
}

.main-nav a:hover {
  color: #FF6B35;
  transform: translateY(-1px);
}

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

.nav-cta {
  padding: 10px 24px;
  border-radius: 50px;
  color: #fff !important;
  font-weight: 700;
  background: linear-gradient(135deg, #FF6B35, #FF8F65) !important;
  box-shadow: 0 4px 16px rgba(255, 107, 53, 0.3);
  transition: box-shadow 0.3s, transform 0.3s !important;
}

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

.nav-cta:hover {
  box-shadow: 0 8px 28px rgba(255, 107, 53, 0.4) !important;
  transform: translateY(-2px) !important;
}

.menu-toggle {
  display: none;
  width: 36px;
  height: 36px;
  border: none;
  background: rgba(255, 107, 53, 0.1);
  border-radius: 8px;
  cursor: pointer;
  align-items: center;
  justify-content: center;
  font-size: 1.2rem;
  color: #FF6B35;
}

/* ===== HERO ===== */
.hero {
  min-height: 85vh;
  display: flex;
  align-items: center;
  margin-top: 72px;
  background: linear-gradient(160deg, #FFFBF5 0%, #FFF3EC 50%, #FFF0E5 100%);
  position: relative;
  overflow: hidden;
}

.hero::after {
  content: '';
  position: absolute;
  width: 400px;
  height: 400px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(46, 196, 182, 0.12) 0%, transparent 70%);
  bottom: -120px;
  right: -80px;
  pointer-events: none;
}

.hero .container {
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: 48px;
  align-items: center;
  position: relative;
  z-index: 1;
}

.hero-content {
  max-width: 640px;
}

.hero-eyebrow {
  display: inline-block;
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 2px;
  padding: 6px 18px;
  border-radius: 50px;
  margin-bottom: 20px;
  background: linear-gradient(135deg, rgba(255, 107, 53, 0.12), rgba(46, 196, 182, 0.12));
  color: #FF6B35;
  border: 1px solid rgba(255, 107, 53, 0.15);
}

.hero h1 {
  font-size: 3.6rem;
  line-height: 1.1;
  margin-bottom: 20px;
  font-weight: 900;
  letter-spacing: -1px;
  background: linear-gradient(135deg, #1A1A2E 40%, #FF6B35 70%, #2EC4B6 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero p {
  font-size: 1.15rem;
  opacity: 0.75;
  max-width: 520px;
  margin-bottom: 36px;
  color: #4A4A6A;
  line-height: 1.7;
}

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

.hero-image {
  border-radius: 20px;
  overflow: hidden;
  box-shadow: 0 24px 64px rgba(255, 107, 53, 0.15), 0 8px 24px rgba(0, 0, 0, 0.06);
  transform: perspective(1000px) rotateY(-3deg);
  transition: transform 0.5s ease;
}

.hero-image:hover {
  transform: perspective(1000px) rotateY(0deg);
}

.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: 50px;
  font-weight: 700;
  font-size: 0.95rem;
  cursor: pointer;
  border: none;
  text-decoration: none;
  transition: all 0.3s cubic-bezier(0.34, 1.56, 0.64, 1);
  letter-spacing: 0.2px;
}

.btn-primary {
  color: #fff;
  background: linear-gradient(135deg, #FF6B35, #FF8F65);
  box-shadow: 0 6px 20px rgba(255, 107, 53, 0.3);
}

.btn-primary:hover {
  transform: translateY(-3px) scale(1.03);
  box-shadow: 0 12px 36px rgba(255, 107, 53, 0.4);
}

.btn-outline {
  background: transparent;
  border: 2px solid #FF6B35;
  color: #FF6B35;
}

.btn-outline:hover {
  background: #FF6B35;
  color: #fff;
  transform: translateY(-3px);
  box-shadow: 0 8px 24px rgba(255, 107, 53, 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: #2EC4B6;
  position: relative;
  padding-left: 36px;
}

.section-label::before {
  content: '';
  position: absolute;
  left: 0;
  top: 50%;
  transform: translateY(-50%);
  width: 24px;
  height: 2px;
  background: linear-gradient(90deg, #2EC4B6, transparent);
  border-radius: 2px;
}

.section-title {
  font-size: 2.4rem;
  font-weight: 800;
  margin-bottom: 14px;
  letter-spacing: -0.5px;
  color: #1A1A2E;
}

.section-desc {
  max-width: 600px;
  opacity: 0.7;
  margin-bottom: 44px;
  font-size: 1.05rem;
  color: #4A4A6A;
  line-height: 1.7;
}

/* ===== 卡片网格 ===== */
.cards-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(270px, 1fr));
  gap: 28px;
}

.category-card {
  border-radius: 16px;
  padding: 32px 28px;
  background: #fff;
  border: 1px solid rgba(255, 107, 53, 0.08);
  transition: all 0.4s cubic-bezier(0.34, 1.56, 0.64, 1);
  position: relative;
  overflow: hidden;
}

.category-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 4px;
  background: linear-gradient(90deg, #FF6B35, #2EC4B6);
  opacity: 0;
  transition: opacity 0.4s;
}

.category-card:hover {
  transform: translateY(-8px);
  box-shadow: 0 16px 48px rgba(255, 107, 53, 0.10), 0 4px 16px rgba(0, 0, 0, 0.04);
  border-color: rgba(255, 107, 53, 0.2);
}

.category-card:hover::before {
  opacity: 1;
}

.card-icon {
  width: 52px;
  height: 52px;
  border-radius: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 18px;
  font-size: 1.5rem;
  background: linear-gradient(135deg, rgba(255, 107, 53, 0.1), rgba(46, 196, 182, 0.1));
  color: #FF6B35;
  transition: transform 0.3s;
}

.category-card:hover .card-icon {
  transform: scale(1.08);
}

.category-card h3 {
  font-size: 1.2rem;
  font-weight: 700;
  margin-bottom: 8px;
  color: #1A1A2E;
}

.category-card p {
  font-size: 0.9rem;
  opacity: 0.6;
  line-height: 1.6;
  margin-bottom: 16px;
  color: #4A4A6A;
}

.card-link {
  font-weight: 700;
  font-size: 0.85rem;
  text-decoration: none;
  color: #FF6B35;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  transition: gap 0.3s;
}

.card-link:hover {
  gap: 12px;
}

/* ===== 特性块 ===== */
.feature-block {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items: center;
}

.feature-image {
  border-radius: 16px;
  overflow: hidden;
  box-shadow: 0 16px 48px rgba(46, 196, 182, 0.12);
  position: relative;
}

.feature-image::after {
  content: '';
  position: absolute;
  inset: 0;
  border: 2px solid rgba(46, 196, 182, 0.1);
  border-radius: 16px;
  pointer-events: none;
}

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

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

.feature-text h3 {
  font-size: 1.8rem;
  font-weight: 800;
  margin-bottom: 16px;
  color: #1A1A2E;
  letter-spacing: -0.3px;
}

.feature-text p {
  opacity: 0.7;
  margin-bottom: 20px;
  line-height: 1.7;
  color: #4A4A6A;
}

.feature-list {
  list-style: none;
}

.feature-list li {
  padding: 8px 0;
  display: flex;
  align-items: center;
  gap: 12px;
  font-weight: 500;
  color: #1A1A2E;
}

.feature-list li::before {
  content: '✦';
  font-weight: 700;
  color: #2EC4B6;
  font-size: 1.1rem;
}

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

.stat-item {
  padding: 32px 20px;
  border-radius: 16px;
  background: #fff;
  border: 1px solid rgba(255, 107, 53, 0.08);
  transition: transform 0.3s, box-shadow 0.3s;
}

.stat-item:hover {
  transform: translateY(-4px);
  box-shadow: 0 12px 32px rgba(255, 107, 53, 0.08);
}

.stat-number {
  font-size: 2.8rem;
  font-weight: 900;
  background: linear-gradient(135deg, #FF6B35, #FF8F65);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  line-height: 1.1;
}

.stat-label {
  font-size: 0.9rem;
  opacity: 0.6;
  margin-top: 8px;
  color: #4A4A6A;
  font-weight: 500;
}

/* ===== 内容墙 ===== */
.content-wall {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 28px;
}

.content-wall-item {
  border-radius: 16px;
  overflow: hidden;
  background: #fff;
  border: 1px solid rgba(255, 107, 53, 0.08);
  transition: all 0.4s cubic-bezier(0.34, 1.56, 0.64, 1);
}

.content-wall-item:hover {
  transform: translateY(-8px);
  box-shadow: 0 16px 48px rgba(255, 107, 53, 0.10);
  border-color: rgba(255, 107, 53, 0.2);
}

.content-wall-item img {
  width: 100%;
  height: 210px;
  object-fit: cover;
  transition: transform 0.6s ease;
}

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

.content-wall-body {
  padding: 24px 22px;
}

.content-wall-body h4 {
  font-size: 1.1rem;
  font-weight: 700;
  margin-bottom: 8px;
  color: #1A1A2E;
}

.content-wall-body p {
  font-size: 0.88rem;
  opacity: 0.6;
  line-height: 1.6;
  color: #4A4A6A;
}

.content-wall-body .card-link {
  margin-top: 14px;
  display: inline-flex;
}

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

.faq-item {
  border: 1px solid rgba(255, 107, 53, 0.1);
  border-radius: 12px;
  margin-bottom: 10px;
  overflow: hidden;
  cursor: pointer;
  background: #fff;
  transition: border-color 0.3s, box-shadow 0.3s;
}

.faq-item:hover {
  border-color: rgba(255, 107, 53, 0.25);
  box-shadow: 0 4px 16px rgba(255, 107, 53, 0.04);
}

.faq-item .faq-question {
  padding: 18px 24px;
  font-weight: 700;
  display: flex;
  justify-content: space-between;
  align-items: center;
  color: #1A1A2E;
  font-size: 1.02rem;
}

.faq-item .faq-question::after {
  content: '+';
  font-size: 1.3rem;
  font-weight: 300;
  color: #FF6B35;
  transition: transform 0.3s;
}

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

.faq-item .faq-answer {
  padding: 0 24px 18px;
  display: none;
  opacity: 0.7;
  line-height: 1.7;
  color: #4A4A6A;
}

.faq-item.open .faq-answer {
  display: block;
  animation: fadeSlide 0.35s ease;
}

@keyframes fadeSlide {
  from { opacity: 0; transform: translateY(-8px); }
  to { opacity: 0.7; transform: translateY(0); }
}

/* ===== CTA横幅 ===== */
.cta-banner {
  padding: 64px 32px;
  text-align: center;
  border-radius: 20px;
  background: linear-gradient(135deg, #FF6B35 0%, #FF8F65 50%, #2EC4B6 100%);
  color: #fff;
  position: relative;
  overflow: hidden;
  box-shadow: 0 16px 56px rgba(255, 107, 53, 0.25);
}

.cta-banner::before {
  content: '';
  position: absolute;
  width: 300px;
  height: 300px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.05);
  top: -80px;
  right: -60px;
  pointer-events: none;
}

.cta-banner::after {
  content: '';
  position: absolute;
  width: 200px;
  height: 200px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.04);
  bottom: -60px;
  left: -40px;
  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, 0.85);
  max-width: 500px;
  margin: 0 auto 28px;
  font-size: 1.05rem;
  position: relative;
  z-index: 1;
}

.cta-banner .btn-primary {
  background: #fff;
  color: #FF6B35;
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.12);
  position: relative;
  z-index: 1;
}

.cta-banner .btn-primary:hover {
  box-shadow: 0 12px 36px rgba(0, 0, 0, 0.18);
  transform: translateY(-3px) scale(1.03);
}

/* ===== 页脚 ===== */
.site-footer {
  padding: 64px 0 32px;
  background: #1A1A2E;
  color: rgba(255, 255, 255, 0.8);
}

.site-footer .container {
  position: relative;
  z-index: 1;
}

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

.footer-brand .logo {
  color: #fff;
  margin-bottom: 14px;
}

.footer-brand p {
  opacity: 0.6;
  font-size: 0.88rem;
  line-height: 1.7;
  max-width: 300px;
}

.footer-col h4 {
  color: #fff;
  font-size: 0.95rem;
  font-weight: 700;
  margin-bottom: 18px;
  letter-spacing: 0.5px;
}

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

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

.footer-col ul li a {
  color: rgba(255, 255, 255, 0.6);
  text-decoration: none;
  font-size: 0.88rem;
  transition: color 0.3s, padding-left 0.3s;
}

.footer-col ul li a:hover {
  color: #FF6B35;
  padding-left: 4px;
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  margin-top: 48px;
  padding-top: 24px;
  text-align: center;
  font-size: 0.82rem;
  opacity: 0.5;
  color: rgba(255, 255, 255, 0.7);
}

/* ===== 工具类 ===== */
.text-accent {
  color: #FF6B35;
}

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

.seo-description {
  max-width: 600px;
  margin: 0 auto 52px;
  opacity: 0.7;
  font-size: 1.05rem;
  line-height: 1.7;
  color: #4A4A6A;
}

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

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

/* ===== 响应式 ===== */
@media (max-width: 1024px) {
  .hero h1 {
    font-size: 2.8rem;
  }
  .hero .container {
    grid-template-columns: 1fr;
    text-align: center;
  }
  .hero-content {
    max-width: 100%;
  }
  .hero p {
    max-width: 100%;
    margin-left: auto;
    margin-right: auto;
  }
  .hero-buttons {
    justify-content: center;
  }
  .hero-image {
    max-width: 500px;
    margin: 0 auto;
    transform: none;
  }
  .hero-image:hover {
    transform: none;
  }
  .feature-block {
    gap: 40px;
  }
  .footer-grid {
    gap: 32px;
  }
}

@media (max-width: 768px) {
  .section {
    padding: 72px 0;
  }
  .hero {
    min-height: auto;
    padding: 80px 0 60px;
  }
  .hero h1 {
    font-size: 2.2rem;
  }
  .hero p {
    font-size: 1rem;
  }
  .hero-buttons {
    flex-direction: column;
    align-items: center;
  }
  .hero-buttons .btn {
    width: 100%;
    max-width: 280px;
    justify-content: center;
  }
  .section-title {
    font-size: 1.8rem;
  }
  .feature-block {
    grid-template-columns: 1fr;
    gap: 32px;
  }
  .feature-block:nth-child(even) .feature-image {
    order: -1;
  }
  .stats-bar {
    grid-template-columns: repeat(2, 1fr);
    gap: 16px;
  }
  .stat-number {
    font-size: 2.2rem;
  }
  .footer-grid {
    grid-template-columns: 1fr 1fr;
    gap: 28px;
  }
  .footer-brand {
    grid-column: 1 / -1;
  }
  .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: rgba(255, 251, 245, 0.98);
    backdrop-filter: blur(14px);
    padding: 24px 28px;
    gap: 18px;
    border-bottom: 1px solid rgba(255, 107, 53, 0.1);
    box-shadow: 0 16px 48px rgba(0, 0, 0, 0.06);
  }
  .main-nav.open a {
    font-size: 1rem;
    padding: 6px 0;
  }
  .nav-cta {
    align-self: flex-start;
  }
  .cards-grid {
    grid-template-columns: 1fr 1fr;
    gap: 20px;
  }
  .content-wall {
    grid-template-columns: 1fr 1fr;
    gap: 20px;
  }
  .cta-banner {
    padding: 48px 24px;
  }
  .cta-banner h2 {
    font-size: 1.6rem;
  }
}

@media (max-width: 480px) {
  .hero h1 {
    font-size: 1.8rem;
  }
  .cards-grid,
  .content-wall,
  .stats-bar {
    grid-template-columns: 1fr;
  }
  .footer-grid {
    grid-template-columns: 1fr;
  }
  .hero-buttons {
    flex-direction: column;
    width: 100%;
  }
  .hero-buttons .btn {
    max-width: 100%;
  }
  .section-title {
    font-size: 1.5rem;
  }
  .stat-number {
    font-size: 1.8rem;
  }
  .cta-banner {
    padding: 40px 20px;
  }
  .cta-banner h2 {
    font-size: 1.3rem;
  }
  .category-card {
    padding: 24px 20px;
  }
}