/* ===== 设计令牌 ===== */
:root {
  --color-primary: #1B4332;
  --color-primary-dark: #143525;
  --color-primary-light: #2D6A4F;
  --color-accent: #D4A574;
  --color-accent-light: #E8C9A0;
  --color-accent-dark: #B8895A;
  --color-success: #52B788;
  --color-bg: #FAF8F5;
  --color-bg-alt: #F3EFE8;
  --color-bg-dark: #143525;
  --color-text: #2D2D2D;
  --color-text-light: #6B6B6B;
  --color-text-on-dark: #F5F3EF;
  --color-border: #E0DBD2;
  --color-white: #FFFFFF;
  --font-display: 'Noto Serif SC', 'Songti SC', 'SimSun', serif;
  --font-body: 'Noto Sans SC', 'PingFang SC', 'Microsoft YaHei', sans-serif;
  --max-width: 1200px;
  --section-padding: 100px 0;
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 16px;
  --shadow-sm: 0 2px 8px rgba(27, 67, 50, 0.06);
  --shadow-md: 0 8px 24px rgba(27, 67, 50, 0.1);
  --shadow-lg: 0 16px 48px rgba(27, 67, 50, 0.15);
  --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

/* ===== 重置与基础 ===== */
*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.7;
  color: var(--color-text);
  background-color: var(--color-bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}
img { max-width: 100%; display: block; }
a { text-decoration: none; color: inherit; }
ul, ol { list-style: none; }
button { font-family: inherit; cursor: pointer; border: none; background: none; }

.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
}

/* ===== 导航栏 ===== */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: rgba(250, 248, 245, 0.92);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid transparent;
  transition: var(--transition);
}
.navbar.scrolled {
  border-bottom-color: var(--color-border);
  box-shadow: var(--shadow-sm);
}
.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
}
.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-display);
  font-size: 22px;
  font-weight: 700;
  color: var(--color-primary);
}
.logo-mark {
  width: 36px;
  height: 36px;
  background: linear-gradient(135deg, var(--color-primary), var(--color-primary-light));
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-accent);
  font-size: 18px;
  font-weight: 900;
}
.nav-links {
  display: flex;
  align-items: center;
  gap: 36px;
}
.nav-links a {
  font-size: 15px;
  font-weight: 500;
  color: var(--color-text);
  position: relative;
  transition: var(--transition);
}
.nav-links a::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--color-accent);
  transition: var(--transition);
}
.nav-links a:hover { color: var(--color-primary); }
.nav-links a:hover::after { width: 100%; }
.nav-cta {
  padding: 10px 24px;
  background: var(--color-primary);
  color: var(--color-white);
  border-radius: var(--radius-sm);
  font-size: 14px;
  font-weight: 500;
  transition: var(--transition);
}
.nav-cta:hover {
  background: var(--color-primary-dark);
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
}
.mobile-menu-btn {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: 8px;
}
.mobile-menu-btn span {
  width: 24px;
  height: 2px;
  background: var(--color-primary);
  transition: var(--transition);
}

/* ===== Hero 区 ===== */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding: 120px 0 80px;
  background: var(--color-primary-dark);
  overflow: hidden;
}
.hero-bg {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-image: url('https://aka.doubaocdn.com/s/2P7d2xjrOA');
  background-size: cover;
  background-position: center;
  opacity: 0.35;
}
.hero-overlay {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: linear-gradient(135deg, rgba(20, 53, 37, 0.92) 0%, rgba(27, 67, 50, 0.85) 50%, rgba(20, 53, 37, 0.9) 100%);
}
.hero-content {
  position: relative;
  z-index: 2;
  max-width: 760px;
  margin: 0 auto;
  text-align: center;
}
.hero-left { width: 100%; }
.hero-subtitle { margin-left: auto; margin-right: auto; }
.hero-actions { justify-content: center; }
.hero-stats { justify-content: center; }
.hero-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 16px;
  background: rgba(212, 165, 116, 0.15);
  border: 1px solid rgba(212, 165, 116, 0.3);
  border-radius: 100px;
  color: var(--color-accent-light);
  font-size: 13px;
  font-weight: 500;
  margin-bottom: 24px;
}
.hero-eyebrow-dot {
  width: 6px;
  height: 6px;
  background: var(--color-accent);
  border-radius: 50%;
  animation: pulse 2s infinite;
}
@keyframes pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.5; transform: scale(1.3); }
}
.hero-title {
  font-family: var(--font-display);
  font-size: 52px;
  font-weight: 900;
  line-height: 1.25;
  color: var(--color-text-on-dark);
  margin-bottom: 24px;
  letter-spacing: -0.5px;
}
.hero-title .accent {
  color: var(--color-accent);
  position: relative;
}
.hero-title .accent::after {
  content: '';
  position: absolute;
  bottom: 4px;
  left: 0;
  right: 0;
  height: 3px;
  background: var(--color-accent);
  opacity: 0.4;
  border-radius: 2px;
}
.hero-subtitle {
  font-size: 18px;
  line-height: 1.8;
  color: rgba(245, 243, 239, 0.75);
  margin-bottom: 40px;
  max-width: 520px;
}
.hero-actions {
  display: flex;
  gap: 16px;
  margin-bottom: 48px;
}
.btn-primary {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 16px 36px;
  background: var(--color-accent);
  color: var(--color-primary-dark);
  border-radius: var(--radius-sm);
  font-size: 16px;
  font-weight: 600;
  transition: var(--transition);
}
.btn-primary:hover {
  background: var(--color-accent-light);
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(212, 165, 116, 0.3);
}
.btn-secondary {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 16px 36px;
  background: transparent;
  color: var(--color-text-on-dark);
  border: 1px solid rgba(245, 243, 239, 0.3);
  border-radius: var(--radius-sm);
  font-size: 16px;
  font-weight: 500;
  transition: var(--transition);
}
.btn-secondary:hover {
  border-color: var(--color-accent);
  color: var(--color-accent);
  background: rgba(212, 165, 116, 0.08);
}
.hero-stats {
  display: flex;
  gap: 48px;
}
.hero-stat {
  display: flex;
  flex-direction: column;
}
.hero-stat-number {
  font-family: var(--font-display);
  font-size: 36px;
  font-weight: 700;
  color: var(--color-accent);
  line-height: 1.2;
}
.hero-stat-label {
  font-size: 13px;
  color: rgba(245, 243, 239, 0.6);
  margin-top: 4px;
}

/* ===== 通用区块 ===== */
.section {
  padding: var(--section-padding);
}
.section-header {
  text-align: center;
  max-width: 680px;
  margin: 0 auto 64px;
}
.section-eyebrow {
  display: inline-block;
  font-size: 13px;
  font-weight: 600;
  color: var(--color-accent-dark);
  text-transform: uppercase;
  letter-spacing: 2px;
  margin-bottom: 16px;
}
.section-title {
  font-family: var(--font-display);
  font-size: 38px;
  font-weight: 700;
  color: var(--color-primary);
  line-height: 1.3;
  margin-bottom: 16px;
}
.section-desc {
  font-size: 17px;
  color: var(--color-text-light);
  line-height: 1.8;
}

/* ===== 关于我们 ===== */
.about {
  background: var(--color-bg);
}
.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 80px;
  align-items: center;
}
.about-image {
  position: relative;
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-lg);
}
.about-image img {
  width: 100%;
  height: 480px;
  object-fit: cover;
}
.about-image-badge {
  position: absolute;
  bottom: 24px;
  left: 24px;
  background: var(--color-primary);
  color: var(--color-white);
  padding: 16px 24px;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  gap: 12px;
}
.about-image-badge-number {
  font-family: var(--font-display);
  font-size: 32px;
  font-weight: 900;
  color: var(--color-accent);
  line-height: 1;
}
.about-image-badge-text {
  font-size: 13px;
  line-height: 1.4;
  color: rgba(255, 255, 255, 0.8);
}
.about-content .section-eyebrow { text-align: left; }
.about-content .section-title { text-align: left; margin-bottom: 24px; }
.about-text {
  font-size: 16px;
  line-height: 1.9;
  color: var(--color-text-light);
  margin-bottom: 20px;
}
.about-features {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
  margin-top: 32px;
}
.about-feature {
  display: flex;
  align-items: flex-start;
  gap: 12px;
}
.about-feature-icon {
  flex-shrink: 0;
  width: 28px;
  height: 28px;
  background: rgba(212, 165, 116, 0.15);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-accent-dark);
}
.about-feature-text {
  font-size: 14px;
  font-weight: 500;
  color: var(--color-text);
  line-height: 1.5;
  padding-top: 3px;
}

/* ===== 核心优势 ===== */
.advantages {
  background: var(--color-bg-alt);
}
.advantages-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}
.advantage-card {
  background: var(--color-white);
  border-radius: var(--radius-lg);
  padding: 40px 32px;
  transition: var(--transition);
  border: 1px solid transparent;
  position: relative;
  overflow: hidden;
}
.advantage-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: var(--color-accent);
  transform: scaleX(0);
  transform-origin: left;
  transition: var(--transition);
}
.advantage-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-lg);
  border-color: var(--color-border);
}
.advantage-card:hover::before {
  transform: scaleX(1);
}
.advantage-icon {
  width: 56px;
  height: 56px;
  background: linear-gradient(135deg, var(--color-primary), var(--color-primary-light));
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-accent);
  margin-bottom: 24px;
}
.advantage-title {
  font-family: var(--font-display);
  font-size: 20px;
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: 12px;
}
.advantage-desc {
  font-size: 14px;
  line-height: 1.8;
  color: var(--color-text-light);
}

/* ===== 服务流程 ===== */
.process {
  background: var(--color-bg);
}
.process-timeline {
  position: relative;
  max-width: 900px;
  margin: 0 auto;
}
.process-line {
  position: absolute;
  top: 40px;
  left: 10%;
  right: 10%;
  height: 2px;
  background: linear-gradient(90deg, var(--color-accent), var(--color-primary-light), var(--color-accent));
  opacity: 0.3;
}
.process-steps {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  position: relative;
}
.process-step {
  text-align: center;
  position: relative;
}
.process-step-number {
  width: 80px;
  height: 80px;
  margin: 0 auto 24px;
  background: var(--color-white);
  border: 2px solid var(--color-accent);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-display);
  font-size: 28px;
  font-weight: 900;
  color: var(--color-accent-dark);
  position: relative;
  z-index: 2;
  transition: var(--transition);
}
.process-step:hover .process-step-number {
  background: var(--color-accent);
  color: var(--color-white);
  transform: scale(1.1);
  box-shadow: 0 8px 24px rgba(212, 165, 116, 0.4);
}
.process-step-title {
  font-family: var(--font-display);
  font-size: 18px;
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: 10px;
}
.process-step-desc {
  font-size: 14px;
  line-height: 1.7;
  color: var(--color-text-light);
  padding: 0 8px;
}

/* ===== 常见问题 ===== */
.faq {
  background: var(--color-bg-alt);
}
.faq-list {
  max-width: 800px;
  margin: 0 auto;
}
.faq-item {
  background: var(--color-white);
  border-radius: var(--radius-md);
  margin-bottom: 16px;
  overflow: hidden;
  border: 1px solid var(--color-border);
  transition: var(--transition);
}
.faq-item:hover {
  border-color: var(--color-accent);
}
.faq-item.active {
  border-color: var(--color-accent);
  box-shadow: var(--shadow-md);
}
.faq-question {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 24px 28px;
  text-align: left;
  font-size: 16px;
  font-weight: 600;
  color: var(--color-primary);
  transition: var(--transition);
}
.faq-question:hover {
  color: var(--color-accent-dark);
}
.faq-icon {
  flex-shrink: 0;
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background: rgba(212, 165, 116, 0.15);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: var(--transition);
  margin-left: 16px;
}
.faq-item.active .faq-icon {
  background: var(--color-accent);
  transform: rotate(45deg);
}
.faq-icon svg {
  width: 14px;
  height: 14px;
  color: var(--color-accent-dark);
  transition: var(--transition);
}
.faq-item.active .faq-icon svg {
  color: var(--color-white);
}
.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}
.faq-item.active .faq-answer {
  max-height: 300px;
}
.faq-answer-inner {
  padding: 0 28px 24px;
  font-size: 15px;
  line-height: 1.8;
  color: var(--color-text-light);
}

/* ===== CTA 区 ===== */
.cta {
  background: var(--color-primary-dark);
  position: relative;
  overflow: hidden;
  padding: 100px 0;
}
.cta-bg {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-image: url('https://aka.doubaocdn.com/s/2P7d2xjrOA');
  background-size: cover;
  background-position: center;
  opacity: 0.2;
}
.cta-content {
  position: relative;
  z-index: 2;
  text-align: center;
  max-width: 720px;
  margin: 0 auto;
}
.cta-title {
  font-family: var(--font-display);
  font-size: 40px;
  font-weight: 900;
  color: var(--color-text-on-dark);
  line-height: 1.3;
  margin-bottom: 20px;
}
.cta-title .accent { color: var(--color-accent); }
.cta-desc {
  font-size: 17px;
  color: rgba(245, 243, 239, 0.7);
  margin-bottom: 40px;
  line-height: 1.8;
}
.cta-actions {
  display: flex;
  gap: 16px;
  justify-content: center;
}

/* ===== 页脚 ===== */
.footer {
  background: #0F2A1D;
  padding: 48px 0 28px;
  color: rgba(245, 243, 239, 0.6);
  text-align: center;
}
.footer-simple {
  margin-bottom: 20px;
}
.footer-logo {
  justify-content: center;
  color: var(--color-text-on-dark);
  margin-bottom: 8px;
}
.footer-slogan {
  font-size: 14px;
  color: rgba(245, 243, 239, 0.5);
}
.footer-bottom {
  border-top: 1px solid rgba(245, 243, 239, 0.1);
  padding-top: 20px;
  font-size: 13px;
  color: rgba(245, 243, 239, 0.4);
}

/* ===== 友情链接 ===== */
.flink-wrap {
  margin-top: 24px;
  opacity: 0.6;
}
.flink-toggle {
  cursor: pointer;
  user-select: none;
  font-size: 13px;
  color: rgba(245, 243, 239, 0.7);
  transition: var(--transition);
}
.flink-toggle:hover {
  color: var(--color-accent);
}
.flink-box {
  margin-top: 8px;
  font-size: 13px;
  line-height: 2;
}
.flink-box.hidden {
  display: none;
}
.flink-box a {
  color: rgba(245, 243, 239, 0.6);
  margin-right: 16px;
  transition: var(--transition);
}
.flink-box a:hover {
  color: var(--color-accent);
}

/* ===== 滚动动画 ===== */
.reveal {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}
.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ===== 移动端菜单 ===== */
.mobile-menu {
  display: none;
  position: fixed;
  top: 72px;
  left: 0;
  right: 0;
  background: var(--color-bg);
  border-bottom: 1px solid var(--color-border);
  padding: 24px;
  z-index: 999;
}
.mobile-menu.open { display: block; }
.mobile-menu a {
  display: block;
  padding: 14px 0;
  font-size: 16px;
  font-weight: 500;
  color: var(--color-text);
  border-bottom: 1px solid var(--color-border);
}
.mobile-menu a:last-child { border-bottom: none; }

/* ===== 响应式 ===== */
@media (max-width: 1024px) {
  .hero-title { font-size: 42px; }
  .about-grid { grid-template-columns: 1fr; gap: 48px; }
  .advantages-grid { grid-template-columns: repeat(2, 1fr); }
  .process-steps { grid-template-columns: repeat(2, 1fr); gap: 40px; }
  .process-line { display: none; }
}

@media (max-width: 768px) {
  .nav-links, .nav-cta { display: none; }
  .mobile-menu-btn { display: flex; }
  .hero { padding: 100px 0 60px; min-height: auto; }
  .hero-title { font-size: 32px; }
  .hero-subtitle { font-size: 16px; }
  .hero-actions { flex-direction: column; }
  .btn-primary, .btn-secondary { justify-content: center; }
  .hero-stats { flex-wrap: wrap; gap: 24px; }
  .hero-stat-number { font-size: 28px; }
  .section { padding: 64px 0; }
  .section-title { font-size: 28px; }
  .advantages-grid { grid-template-columns: 1fr; }
  .process-steps { grid-template-columns: 1fr; }
  .about-features { grid-template-columns: 1fr; }
  .cta-title { font-size: 28px; }
  .cta-actions { flex-direction: column; align-items: center; }
}