/* roulang page: index */
/* ===== 设计变量 ===== */
:root {
  --brand: #0E7C7B;
  --brand-dark: #0B5D5A;
  --accent: #FF8A3D;
  --accent-dark: #FF6B4A;
  --bg: #F6F8F7;
  --card: #FFFFFF;
  --ink: #0C1F1E;
  --text: #1F2937;
  --text-light: #6B7280;
  --border-soft: rgba(11, 93, 90, 0.08);
  --shadow-card: 0 8px 30px rgba(11, 93, 90, 0.10);
  --shadow-card-hover: 0 12px 40px rgba(11, 93, 90, 0.16);
  --radius-lg: 20px;
  --radius-md: 12px;
  --radius-pill: 999px;
}

/* ===== 基础 reset ===== */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}
html {
  scroll-behavior: smooth;
}
body {
  font-family: ui-sans-serif, "PingFang SC", "HarmonyOS Sans SC", "Microsoft YaHei", sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.75;
  font-size: 15px;
  -webkit-font-smoothing: antialiased;
}
a {
  color: inherit;
  text-decoration: none;
}
img {
  max-width: 100%;
  display: block;
  object-fit: cover;
}
button, input {
  font-family: inherit;
}

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

/* ===== 导航 ===== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(246, 248, 247, 0.85);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid transparent;
  transition: border-color 0.25s ease, box-shadow 0.25s ease;
  height: 72px;
}
.site-header.is-scrolled {
  border-bottom-color: var(--border-soft);
  box-shadow: 0 4px 20px rgba(11, 93, 90, 0.06);
}
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
  gap: 16px;
}
.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
}
.logo-mark {
  width: 38px;
  height: 38px;
  border-radius: 12px;
  background: linear-gradient(135deg, #0E7C7B, #0B5D5A);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 800;
  font-size: 20px;
  line-height: 1;
  box-shadow: 0 4px 12px rgba(11, 93, 90, 0.25);
}
.logo-text {
  font-size: 18px;
  font-weight: 700;
  color: var(--text);
  letter-spacing: -0.3px;
  white-space: nowrap;
}
.logo-suffix {
  font-size: 12px;
  color: var(--text-light);
  margin-left: 2px;
  font-weight: 400;
  white-space: nowrap;
}
.main-nav {
  display: flex;
  align-items: center;
  gap: 6px;
}
.nav-chip {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  height: 36px;
  padding: 0 14px;
  border-radius: 999px;
  font-size: 14px;
  font-weight: 500;
  color: #4B5563;
  transition: background 0.2s ease, color 0.2s ease;
  white-space: nowrap;
}
.nav-chip:hover {
  background: rgba(14, 124, 123, 0.08);
  color: var(--brand-dark);
}
.nav-chip.active {
  background: linear-gradient(135deg, #0E7C7B, #0B5D5A);
  color: #fff;
  font-weight: 600;
  box-shadow: 0 4px 12px rgba(14, 124, 123, 0.25);
}
.btn-primary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  height: 44px;
  padding: 0 24px;
  border-radius: 12px;
  background: linear-gradient(135deg, #FF8A3D, #FF6B4A);
  color: #fff;
  font-weight: 700;
  font-size: 14px;
  border: none;
  cursor: pointer;
  transition: all 0.2s ease;
  box-shadow: 0 6px 18px rgba(255, 107, 74, 0.28);
  white-space: nowrap;
}
.btn-primary:hover {
  filter: brightness(1.08);
  transform: translateY(-2px);
  box-shadow: 0 10px 26px rgba(255, 107, 74, 0.34);
}
.btn-primary:active {
  transform: translateY(1px);
  box-shadow: 0 4px 12px rgba(255, 107, 74, 0.2);
}
.btn-secondary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  height: 44px;
  padding: 0 24px;
  border-radius: 12px;
  background: #fff;
  color: var(--brand-dark);
  font-weight: 600;
  font-size: 14px;
  border: 1.5px solid var(--brand);
  cursor: pointer;
  transition: all 0.2s ease;
  white-space: nowrap;
}
.btn-secondary:hover {
  background: rgba(14, 124, 123, 0.05);
  transform: translateY(-2px);
}
.btn-secondary:active {
  transform: translateY(1px);
}
.btn-lg {
  height: 48px;
  padding: 0 32px;
  font-size: 15px;
}
.btn-sm {
  height: 36px;
  padding: 0 16px;
  font-size: 13px;
}
.menu-toggle {
  display: none;
  width: 40px;
  height: 40px;
  border-radius: 10px;
  border: 1px solid var(--border-soft);
  background: #fff;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  color: var(--brand-dark);
  font-size: 20px;
  transition: background 0.2s ease;
}
.menu-toggle:hover {
  background: rgba(14, 124, 123, 0.06);
}

/* ===== Hero ===== */
.hero {
  position: relative;
  min-height: 560px;
  display: flex;
  align-items: center;
  overflow: hidden;
  background-color: var(--bg);
}
.hero-bg {
  position: absolute;
  inset: 0;
  background-image: url('/assets/images/backpic/back-1.png');
  background-size: cover;
  background-position: center;
  z-index: 0;
}
.hero-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(105deg, rgba(12, 31, 30, 0.72) 0%, rgba(14, 124, 123, 0.42) 55%, rgba(246, 248, 247, 0.15) 100%);
  z-index: 1;
}
.hero-content {
  position: relative;
  z-index: 2;
  padding: 80px 0;
  max-width: 660px;
}
.hero h1 {
  font-size: 42px;
  font-weight: 800;
  line-height: 1.2;
  color: #fff;
  letter-spacing: -0.5px;
  margin-bottom: 16px;
  text-shadow: 0 4px 20px rgba(0, 0, 0, 0.25);
}
.hero-sub {
  font-size: 17px;
  line-height: 1.75;
  color: rgba(255, 255, 255, 0.92);
  max-width: 540px;
  margin-bottom: 28px;
}
.hero-actions {
  display: flex;
  align-items: center;
  gap: 14px;
  flex-wrap: wrap;
  margin-bottom: 40px;
}
.hero-actions .btn-secondary {
  background: rgba(255, 255, 255, 0.12);
  border-color: rgba(255, 255, 255, 0.6);
  color: #fff;
  backdrop-filter: blur(4px);
}
.hero-actions .btn-secondary:hover {
  background: rgba(255, 255, 255, 0.2);
}
.hero-trust {
  display: flex;
  align-items: center;
  gap: 22px;
  flex-wrap: wrap;
  border-top: 1px solid rgba(255, 255, 255, 0.25);
  padding-top: 20px;
}
.hero-trust span {
  font-size: 13px;
  color: rgba(255, 255, 255, 0.85);
  position: relative;
  padding-left: 14px;
}
.hero-trust span::before {
  content: '';
  position: absolute;
  left: 0;
  top: 50%;
  transform: translateY(-50%);
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--accent);
}

/* ===== 板块通用 ===== */
.section {
  padding: 80px 0;
}
.section-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 44px;
  gap: 16px;
  flex-wrap: wrap;
}
.section-head-left {
  display: flex;
  align-items: center;
  gap: 10px;
}
.section-kicker {
  display: inline-flex;
  align-items: center;
  height: 28px;
  padding: 0 12px;
  border-radius: 999px;
  background: rgba(14, 124, 123, 0.1);
  color: var(--brand-dark);
  font-size: 12px;
  font-weight: 600;
  white-space: nowrap;
}
.section-title {
  font-size: 30px;
  font-weight: 700;
  color: var(--text);
  letter-spacing: -0.3px;
  position: relative;
  padding-left: 14px;
}
.section-title::before {
  content: '';
  position: absolute;
  left: 0;
  top: 50%;
  transform: translateY(-50%);
  width: 4px;
  height: 24px;
  border-radius: 4px;
  background: linear-gradient(180deg, var(--brand), var(--accent));
}
.more-link {
  font-size: 13px;
  color: var(--brand-dark);
  font-weight: 500;
  display: inline-flex;
  align-items: center;
  gap: 4px;
  transition: color 0.2s ease;
}
.more-link:hover {
  color: var(--accent-dark);
}

/* ===== 痛点卡片 ===== */
.pain-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}
.pain-card {
  background: var(--card);
  border-radius: 20px;
  padding: 28px;
  border: 1px solid var(--border-soft);
  box-shadow: var(--shadow-card);
  transition: all 0.25s ease;
}
.pain-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-card-hover);
  border-color: rgba(14, 124, 123, 0.2);
}
.pain-icon {
  width: 44px;
  height: 44px;
  border-radius: 12px;
  background: rgba(14, 124, 123, 0.1);
  color: var(--brand);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 20px;
  margin-bottom: 16px;
}
.pain-card h3 {
  font-size: 18px;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 8px;
}
.pain-card p {
  font-size: 14px;
  color: var(--text-light);
  line-height: 1.7;
}

/* ===== 解决方案 ===== */
.solution-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
}
.solution-card {
  background: var(--card);
  border-radius: 20px;
  padding: 32px;
  border: 1px solid var(--border-soft);
  box-shadow: var(--shadow-card);
  transition: all 0.25s ease;
  display: flex;
  flex-direction: column;
}
.solution-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-card-hover);
  border-color: rgba(14, 124, 123, 0.2);
}
.solution-card .solution-img {
  border-radius: 16px;
  overflow: hidden;
  margin-bottom: 20px;
  aspect-ratio: 16/9;
}
.solution-card .solution-img img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.solution-num {
  font-size: 14px;
  font-weight: 800;
  color: var(--accent);
  letter-spacing: 1px;
  margin-bottom: 6px;
}
.solution-card h3 {
  font-size: 20px;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 10px;
}
.solution-card > p {
  font-size: 14px;
  color: var(--text-light);
  line-height: 1.7;
  margin-bottom: 16px;
}
.solution-features {
  list-style: none;
  margin-top: auto;
}
.solution-features li {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 14px;
  color: var(--text);
  padding: 4px 0;
}
.solution-features li::before {
  content: '✓';
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: rgba(14, 124, 123, 0.12);
  color: var(--brand);
  font-size: 11px;
  font-weight: 700;
  flex-shrink: 0;
}

/* ===== 数据成绩 ===== */
.stats-section {
  background: linear-gradient(135deg, #0C1F1E 0%, #0B5D5A 100%);
  position: relative;
  overflow: hidden;
}
.stats-section::before {
  content: '';
  position: absolute;
  width: 260px;
  height: 260px;
  border-radius: 50%;
  border: 40px solid rgba(255, 255, 255, 0.04);
  top: -80px;
  right: -60px;
}
.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  position: relative;
  z-index: 1;
}
.stat-card {
  background: rgba(255, 255, 255, 0.1);
  border-radius: 16px;
  padding: 24px 20px;
  text-align: center;
  border: 1px solid rgba(255, 255, 255, 0.1);
}
.stat-num {
  font-size: 38px;
  font-weight: 800;
  color: #fff;
  font-variant-numeric: tabular-nums;
  line-height: 1.2;
  margin-bottom: 4px;
}
.stat-label {
  font-size: 13px;
  color: rgba(255, 255, 255, 0.7);
}

/* ===== 证言 ===== */
.testi-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}
.testi-card {
  background: var(--card);
  border-radius: 20px;
  padding: 28px;
  border: 1px solid var(--border-soft);
  box-shadow: var(--shadow-card);
  position: relative;
  transition: all 0.25s ease;
  overflow: hidden;
}
.testi-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 4px;
  height: 100%;
  background: linear-gradient(180deg, var(--accent), var(--accent-dark));
}
.testi-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-card-hover);
}
.testi-quote {
  font-size: 36px;
  line-height: 1;
  color: var(--brand);
  opacity: 0.3;
  font-weight: 800;
  margin-bottom: 8px;
}
.testi-text {
  font-size: 14px;
  color: var(--text);
  line-height: 1.75;
  margin-bottom: 20px;
}
.testi-user {
  display: flex;
  align-items: center;
  gap: 12px;
}
.testi-avatar {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  overflow: hidden;
  flex-shrink: 0;
  border: 2px solid var(--brand);
}
.testi-avatar img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.testi-name {
  font-size: 14px;
  font-weight: 700;
  color: var(--text);
}
.testi-role {
  font-size: 12px;
  color: var(--text-light);
}

/* ===== 资讯列表 ===== */
.latest-list {
  display: flex;
  flex-direction: column;
  gap: 16px;
}
.latest-card {
  display: flex;
  align-items: center;
  gap: 18px;
  background: var(--card);
  border-radius: 20px;
  padding: 16px 18px;
  border: 1px solid var(--border-soft);
  box-shadow: var(--shadow-card);
  transition: all 0.25s ease;
}
.latest-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-card-hover);
  border-color: rgba(14, 124, 123, 0.2);
}
.latest-thumb {
  width: 112px;
  height: 84px;
  border-radius: 12px;
  overflow: hidden;
  flex-shrink: 0;
}
.latest-thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.latest-info {
  flex: 1;
  min-width: 0;
}
.latest-info .chip {
  display: inline-block;
  height: 22px;
  line-height: 22px;
  padding: 0 10px;
  border-radius: 999px;
  background: rgba(14, 124, 123, 0.1);
  color: var(--brand-dark);
  font-size: 12px;
  font-weight: 600;
  margin-bottom: 4px;
}
.latest-info h3 {
  font-size: 16px;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 2px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.latest-info p {
  font-size: 13px;
  color: var(--text-light);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  margin-bottom: 2px;
}
.latest-info time {
  font-size: 12px;
  color: #9CA3AF;
}
.empty-state {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 60px 20px;
  background: var(--card);
  border-radius: 20px;
  border: 1px dashed rgba(11, 93, 90, 0.2);
  color: var(--text-light);
  font-size: 15px;
}
.empty-state .empty-icon {
  font-size: 36px;
  margin-bottom: 12px;
  opacity: 0.4;
}

/* ===== FAQ ===== */
.faq-list {
  max-width: 760px;
  margin: 0 auto;
}
.faq-item {
  border: 1px solid var(--border-soft);
  border-radius: 16px;
  background: var(--card);
  margin-bottom: 12px;
  overflow: hidden;
  transition: border-color 0.2s ease;
}
.faq-item.open {
  border-color: rgba(14, 124, 123, 0.25);
}
.faq-question {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 18px 22px;
  font-size: 15px;
  font-weight: 700;
  color: var(--text);
  cursor: pointer;
  user-select: none;
  gap: 12px;
}
.faq-icon {
  flex-shrink: 0;
  width: 24px;
  height: 24px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 20px;
  color: var(--brand);
  transition: transform 0.2s ease;
  font-weight: 400;
}
.faq-item.open .faq-icon {
  transform: rotate(45deg);
}
.faq-answer {
  max-height: 0;
  overflow: hidden;
  padding: 0 22px;
  font-size: 14px;
  color: #4B5563;
  line-height: 1.75;
  transition: max-height 0.25s ease, padding 0.25s ease;
}
.faq-item.open .faq-answer {
  max-height: 400px;
  padding: 0 22px 18px;
}

/* ===== CTA ===== */
.cta-section {
  padding: 24px 0 80px;
}
.cta-box {
  background: linear-gradient(135deg, #0E7C7B, #0B5D5A);
  border-radius: 28px;
  padding: 64px 40px;
  text-align: center;
  position: relative;
  overflow: hidden;
}
.cta-box::before {
  content: '';
  position: absolute;
  width: 200px;
  height: 200px;
  border-radius: 50%;
  border: 30px solid rgba(255, 255, 255, 0.06);
  top: -60px;
  right: -40px;
}
.cta-box::after {
  content: '';
  position: absolute;
  width: 120px;
  height: 120px;
  border-radius: 50%;
  border: 20px solid rgba(255, 255, 255, 0.04);
  bottom: -40px;
  left: -20px;
}
.cta-box h2 {
  font-size: 30px;
  font-weight: 800;
  color: #fff;
  margin-bottom: 12px;
  position: relative;
  z-index: 1;
}
.cta-box p {
  font-size: 15px;
  color: rgba(255, 255, 255, 0.85);
  margin-bottom: 28px;
  position: relative;
  z-index: 1;
}
.cta-actions {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 14px;
  flex-wrap: wrap;
  position: relative;
  z-index: 1;
}
.cta-actions .btn-primary {
  min-width: 160px;
}
.cta-actions .btn-secondary {
  background: rgba(255, 255, 255, 0.1);
  border-color: rgba(255, 255, 255, 0.5);
  color: #fff;
}
.cta-actions .btn-secondary:hover {
  background: rgba(255, 255, 255, 0.2);
}

/* ===== 页脚 ===== */
.site-footer {
  background: #0C1F1E;
  color: #9CA3AF;
  padding: 64px 0 0;
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1.2fr;
  gap: 40px;
  padding-bottom: 48px;
}
.footer-brand .logo {
  margin-bottom: 14px;
}
.footer-brand .logo-text {
  color: #fff;
}
.footer-brand .footer-desc {
  font-size: 13px;
  color: #9CA3AF;
  line-height: 1.7;
  max-width: 300px;
}
.footer-col h4 {
  font-size: 15px;
  font-weight: 700;
  color: #fff;
  margin-bottom: 16px;
}
.footer-links {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.footer-links a {
  font-size: 14px;
  color: #9CA3AF;
  transition: color 0.2s ease;
}
.footer-links a:hover {
  color: #fff;
}
.footer-safety {
  font-size: 13px;
  line-height: 1.7;
  color: #9CA3AF;
  background: rgba(255, 255, 255, 0.04);
  border-radius: 12px;
  padding: 16px 20px;
  border-left: 3px solid var(--accent);
}
.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  padding: 20px 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 8px;
  font-size: 12px;
  color: #6B7280;
}
.footer-bottom a {
  color: #9CA3AF;
}
.footer-bottom a:hover {
  color: #fff;
}

/* ===== 响应式 ===== */
@media (max-width: 1023px) {
  .section {
    padding: 56px 0;
  }
  .menu-toggle {
    display: flex;
  }
  .main-nav {
    position: fixed;
    top: 72px;
    left: 0;
    right: 0;
    background: #fff;
    padding: 16px 24px 20px;
    flex-direction: column;
    align-items: stretch;
    display: none;
    box-shadow: 0 12px 40px rgba(11, 93, 90, 0.14);
    border-radius: 0 0 16px 16px;
    z-index: 49;
    gap: 4px;
  }
  .main-nav.is-open {
    display: flex;
  }
  .nav-chip {
    justify-content: flex-start;
    height: 44px;
  }
  .hero {
    min-height: 480px;
  }
  .hero h1 {
    font-size: 34px;
  }
  .hero-content {
    padding: 60px 0;
  }
  .pain-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .stats-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .testi-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .footer-grid {
    grid-template-columns: 1fr 1fr;
    gap: 32px;
  }
}

@media (max-width: 767px) {
  .site-header {
    height: 60px;
  }
  .logo-text {
    font-size: 16px;
  }
  .logo-suffix {
    display: none;
  }
  .logo-mark {
    width: 32px;
    height: 32px;
    font-size: 16px;
    border-radius: 10px;
  }
  .btn-primary {
    height: 38px;
    padding: 0 16px;
    font-size: 13px;
  }
  .main-nav {
    top: 60px;
  }
  .hero {
    min-height: 420px;
  }
  .hero h1 {
    font-size: 28px;
  }
  .hero-sub {
    font-size: 15px;
  }
  .hero-content {
    padding: 48px 0;
  }
  .hero-actions {
    flex-direction: column;
    align-items: stretch;
    gap: 10px;
  }
  .hero-actions .btn-primary,
  .hero-actions .btn-secondary {
    width: 100%;
  }
  .hero-trust {
    flex-direction: row;
    gap: 12px;
  }
  .hero-trust span {
    font-size: 12px;
    padding-left: 10px;
  }
  .section-head {
    margin-bottom: 28px;
  }
  .section-title {
    font-size: 24px;
  }
  .pain-grid {
    grid-template-columns: 1fr;
  }
  .solution-grid {
    grid-template-columns: 1fr;
  }
  .testi-grid {
    grid-template-columns: 1fr;
  }
  .latest-card {
    flex-direction: row;
    align-items: flex-start;
    padding: 14px;
  }
  .latest-thumb {
    width: 88px;
    height: 66px;
  }
  .latest-info h3 {
    font-size: 15px;
  }
  .latest-info p {
    font-size: 12px;
  }
  .cta-box {
    padding: 48px 24px;
    border-radius: 20px;
  }
  .cta-box h2 {
    font-size: 24px;
  }
  .cta-actions {
    flex-direction: column;
    align-items: stretch;
  }
  .cta-actions .btn-primary,
  .cta-actions .btn-secondary {
    width: 100%;
  }
  .footer-grid {
    grid-template-columns: 1fr;
    gap: 24px;
    padding-bottom: 32px;
  }
  .footer-bottom {
    flex-direction: column;
    text-align: center;
    justify-content: center;
  }
}

/* roulang page: category1 */
:root{
  --deep:#0E7C7B;--pine:#0B5D5A;--cta:#FF8A3D;--coral:#FF6B4A;
  --mist:#F6F8F7;--ink:#0C1F1E;--card:#FFFFFF;--muted:#6B7280;
  --line:rgba(11,93,90,0.08);
  --radius-lg:20px;--radius-xl:28px;--radius-md:12px;
  --shadow:0 8px 30px rgba(11,93,90,0.10);
  --shadow-hover:0 12px 40px rgba(11,93,90,0.16);
  --font:ui-sans-serif,"PingFang SC","HarmonyOS Sans SC","Microsoft YaHei",sans-serif;
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{
  font-family:var(--font);background:var(--mist);color:#1f2937;
  line-height:1.75;-webkit-font-smoothing:antialiased;
}
.container{max-width:1200px;margin:0 auto;padding:0 24px}
a{text-decoration:none;color:inherit}
img{display:block;max-width:100%;object-fit:cover}
button{font-family:inherit;cursor:pointer;border:none;background:none}

/* header/nav */
.site-header{
  position:sticky;top:0;z-index:100;height:72px;
  background:rgba(246,248,247,0.85);
  backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);
  border-bottom:1px solid transparent;
  transition:background .3s,border-color .3s,box-shadow .3s;
}
.site-header.scrolled{
  background:rgba(246,248,247,0.95);
  border-bottom-color:var(--line);
  box-shadow:0 4px 20px rgba(11,93,90,0.06);
}
.header-inner{display:flex;align-items:center;justify-content:space-between;height:72px;gap:12px}
.logo{display:flex;align-items:center;gap:10px;flex-shrink:0}
.logo-mark{
  width:38px;height:38px;border-radius:16px;
  background:linear-gradient(135deg,var(--deep),var(--pine));
  color:#fff;font-size:20px;font-weight:800;
  display:flex;align-items:center;justify-content:center;
  letter-spacing:-1px;
}
.logo-text{font-size:17px;font-weight:800;color:var(--ink);letter-spacing:-0.3px;white-space:nowrap}
.logo-sub{display:block;font-size:11px;font-weight:400;color:var(--muted);letter-spacing:1px;line-height:1}
.main-nav{display:flex;align-items:center;gap:6px;flex-wrap:nowrap;overflow-x:auto;scrollbar-width:none;margin:0 8px}
.main-nav::-webkit-scrollbar{display:none}
.nav-chip{
  display:inline-flex;align-items:center;justify-content:center;
  height:38px;padding:0 16px;border-radius:999px;
  font-size:14px;font-weight:500;color:#4B5563;
  transition:all .2s ease;white-space:nowrap;
}
.nav-chip:hover{background:rgba(11,93,90,0.06);color:var(--deep)}
.nav-chip.active{background:var(--deep);color:#fff;font-weight:600;box-shadow:0 4px 12px rgba(14,124,123,0.22)}
.btn{
  display:inline-flex;align-items:center;justify-content:center;
  height:44px;padding:0 26px;border-radius:var(--radius-md);
  font-size:15px;font-weight:700;transition:all .22s ease;
}
.btn-primary{
  background:linear-gradient(135deg,var(--cta),var(--coral));
  color:#fff !important;box-shadow:0 6px 20px rgba(255,106,74,0.3);
}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 10px 26px rgba(255,106,74,0.38)}
.btn-primary:active{transform:translateY(1px)}
.btn-secondary{background:#fff;color:var(--deep);border:1.5px solid var(--deep)}
.btn-secondary:hover{background:rgba(14,124,123,0.06)}
.btn-lg{height:52px;padding:0 34px;font-size:16px;border-radius:14px}
.cta-nav{height:40px;padding:0 22px;font-size:14px}
.nav-toggle{display:none;flex-direction:column;gap:5px;width:42px;height:42px;align-items:center;justify-content:center;border-radius:12px}
.nav-toggle span{display:block;width:20px;height:2px;background:var(--ink);border-radius:2px;transition:all .3s}
.nav-toggle.open span:nth-child(1){transform:translateY(4px) rotate(45deg)}
.nav-toggle.open span:nth-child(2){opacity:0}
.nav-toggle.open span:nth-child(3){transform:translateY(-6px) rotate(-45deg)}

/* hero */
.hero{position:relative;min-height:560px;display:flex;align-items:center;padding:80px 0;overflow:hidden}
.hero-bg{position:absolute;inset:0;background-size:cover;background-position:center;z-index:0}
.hero-overlay{position:absolute;inset:0;background:linear-gradient(100deg,rgba(12,31,30,0.88),rgba(12,31,30,0.55) 60%,rgba(14,124,123,0.25));z-index:1}
.hero-content{position:relative;z-index:2;max-width:720px}
.hero h1{
  font-size:44px;line-height:1.2;font-weight:800;color:#fff;
  letter-spacing:-0.5px;margin-bottom:20px;text-wrap:balance;
}
.hero-sub{
  font-size:17px;color:rgba(255,255,255,0.88);line-height:1.8;
  max-width:600px;margin-bottom:30px;
}
.hero-actions{display:flex;gap:14px;flex-wrap:wrap;margin-bottom:36px}
.hero-trust{
  display:flex;align-items:center;gap:0;flex-wrap:wrap;
  padding-top:20px;border-top:1px solid rgba(255,255,255,0.14);
}
.hero-trust span{
  font-size:13px;color:rgba(255,255,255,0.75);padding:0 24px;
  position:relative;
}
.hero-trust span:first-child{padding-left:0}
.hero-trust span:not(:last-child)::after{
  content:'';position:absolute;right:0;top:50%;transform:translateY(-50%);
  width:1px;height:14px;background:rgba(255,255,255,0.2);
}

/* sections */
.section{padding:90px 0}
.section-head{display:flex;align-items:flex-end;justify-content:space-between;gap:20px;margin-bottom:48px;flex-wrap:wrap}
.section-tag{
  display:inline-flex;align-items:center;font-size:13px;font-weight:600;color:var(--deep);
  background:rgba(14,124,123,0.08);border-radius:999px;padding:6px 14px;margin-bottom:14px;
}
.section-title{font-size:30px;font-weight:800;color:var(--ink);letter-spacing:-0.3px;line-height:1.3}
.section-title .accent{color:var(--deep)}
.section-desc{font-size:15px;color:var(--muted);max-width:640px;line-height:1.8}

/* feature cards */
.feature-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:22px}
.feature-card{
  background:#fff;border-radius:var(--radius-lg);padding:30px 24px;
  box-shadow:var(--shadow);border:1px solid var(--line);
  transition:transform .25s ease,box-shadow .25s ease,border-color .25s ease;
}
.feature-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-hover);border-color:rgba(14,124,123,0.2)}
.feature-icon{width:48px;height:48px;border-radius:14px;background:rgba(14,124,123,0.08);display:flex;align-items:center;justify-content:center;margin-bottom:20px;font-size:22px}
.feature-card h3{font-size:18px;font-weight:700;color:var(--ink);margin-bottom:10px}
.feature-card p{font-size:14px;color:var(--muted);line-height:1.7}

/* scenarios */
.scenario-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:22px}
.scenario-card{
  background:#fff;border-radius:var(--radius-lg);padding:28px;box-shadow:var(--shadow);
  border:1px solid var(--line);display:flex;gap:20px;align-items:flex-start;
  transition:transform .25s,box-shadow .25s;
}
.scenario-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-hover)}
.scenario-num{
  font-size:26px;font-weight:800;color:var(--cta);line-height:1;
  min-width:48px;text-align:center;padding-top:4px;
}
.scenario-card h3{font-size:17px;font-weight:700;color:var(--ink);margin-bottom:8px}
.scenario-card p{font-size:14px;color:var(--muted);line-height:1.7}

/* steps */
.steps-wrap{background:linear-gradient(135deg,var(--deep),var(--pine));border-radius:var(--radius-xl);padding:52px;position:relative;overflow:hidden}
.steps-wrap::before{content:'';position:absolute;right:-60px;top:-60px;width:220px;height:220px;border-radius:50%;background:rgba(255,255,255,0.05)}
.steps-wrap::after{content:'';position:absolute;left:40%;bottom:-80px;width:240px;height:240px;border-radius:50%;background:rgba(255,255,255,0.03)}
.steps-title{font-size:28px;font-weight:800;color:#fff;margin-bottom:16px;position:relative;z-index:1}
.steps-sub{color:rgba(255,255,255,0.8);font-size:15px;position:relative;z-index:1;margin-bottom:44px;max-width:560px}
.steps-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;position:relative;z-index:1}
.step-card{background:rgba(255,255,255,0.12);border-radius:18px;padding:26px;color:#fff;border:1px solid rgba(255,255,255,0.12);transition:transform .25s,background .25s}
.step-card:hover{transform:translateY(-3px);background:rgba(255,255,255,0.16)}
.step-number{font-size:32px;font-weight:800;color:#fff;opacity:0.9;margin-bottom:14px;font-variant-numeric:tabular-nums}
.step-card h4{font-size:17px;font-weight:700;margin-bottom:8px}
.step-card p{font-size:14px;color:rgba(255,255,255,0.78);line-height:1.7}

/* featured content cards */
.content-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.content-card{
  background:#fff;border-radius:var(--radius-lg);overflow:hidden;
  box-shadow:var(--shadow);border:1px solid var(--line);
  transition:transform .25s,box-shadow .25s;
}
.content-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-hover)}
.content-card-cover{position:relative;height:200px;overflow:hidden}
.content-card-cover img{width:100%;height:100%;object-fit:cover;transition:transform .4s ease}
.content-card:hover .content-card-cover img{transform:scale(1.04)}
.content-card-body{padding:24px}
.content-card-body h3{font-size:18px;font-weight:700;color:var(--ink);margin-bottom:10px;line-height:1.4}
.content-card-body p{font-size:14px;color:var(--muted);line-height:1.7;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;margin-bottom:16px}
.card-link{display:inline-flex;align-items:center;gap:6px;font-size:14px;font-weight:600;color:var(--deep);transition:gap .2s}
.card-link:hover{gap:10px;color:var(--pine)}
.card-link::after{content:'→';font-size:15px;transition:translate .2s}
.card-link:hover::after{transform:translateX(3px)}

/* FAQ */
.faq-grid{display:grid;grid-template-columns:1fr 1fr;gap:16px}
.faq-item{
  background:#fff;border-radius:var(--radius-md);border:1px solid var(--line);
  overflow:hidden;transition:box-shadow .25s;align-self:start;
}
.faq-item.active{box-shadow:var(--shadow)}
.faq-q{
  width:100%;display:flex;align-items:center;justify-content:space-between;
  padding:18px 22px;font-size:15px;font-weight:600;color:var(--ink);
  text-align:left;gap:12px;transition:background .2s;
}
.faq-q:hover{background:rgba(14,124,123,0.03)}
.faq-q::before{
  content:'';flex-shrink:0;width:22px;height:22px;border-radius:50%;
  background:rgba(14,124,123,0.1);color:var(--deep);font-size:14px;font-weight:700;
  display:flex;align-items:center;justify-content:center;
  content:'+';transition:transform .25s ease,background .25s;
}
.faq-item.active .faq-q::before{content:'+';transform:rotate(45deg);background:var(--deep);color:#fff}
.faq-a{max-height:0;overflow:hidden;transition:max-height .25s ease}
.faq-item.active .faq-a{max-height:240px}
.faq-a-inner{padding:0 22px 20px;font-size:14px;color:#4B5563;line-height:1.75}

/* CTA */
.cta-section{padding:20px 0 90px}
.cta-box{
  border-radius:var(--radius-xl);background:linear-gradient(135deg,var(--deep),var(--pine));
  padding:60px 40px;text-align:center;position:relative;overflow:hidden;
}
.cta-box::before{
  content:'';position:absolute;right:-50px;top:-50px;width:200px;height:200px;border-radius:50%;
  background:rgba(255,255,255,0.05);
}
.cta-box::after{
  content:'';position:absolute;left:-30px;bottom:-70px;width:180px;height:180px;border-radius:50%;
  background:rgba(255,255,255,0.04);
}
.cta-title{font-size:28px;font-weight:800;color:#fff;margin-bottom:16px;position:relative;z-index:1}
.cta-desc{font-size:15px;color:rgba(255,255,255,0.85);max-width:520px;margin:0 auto 32px;position:relative;z-index:1}
.cta-actions{display:flex;gap:14px;justify-content:center;flex-wrap:wrap;position:relative;z-index:1}
.btn-ghost{background:rgba(255,255,255,0.14);border:1px solid rgba(255,255,255,0.35);color:#fff;backdrop-filter:blur(4px)}
.btn-ghost:hover{background:rgba(255,255,255,0.22)}

/* footer */
.site-footer{background:var(--ink);color:#9CA3AF;padding:64px 0 0}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1.2fr;gap:48px;padding-bottom:48px}
.footer-brand .logo{margin-bottom:16px}
.footer-brand .logo-text{color:#fff}
.footer-brand .logo-sub{color:rgba(255,255,255,0.5)}
.footer-desc{font-size:14px;color:#9CA3AF;line-height:1.75;margin-top:4px}
.footer-col h4{font-size:15px;font-weight:700;color:#fff;margin-bottom:18px}
.footer-links{list-style:none}
.footer-links li{margin-bottom:10px}
.footer-links a{font-size:14px;color:#9CA3AF;transition:color .2s}
.footer-links a:hover{color:#fff}
.footer-safety{font-size:14px;color:#9CA3AF;line-height:1.75}
.footer-bottom{
  display:flex;align-items:center;justify-content:space-between;gap:12px;flex-wrap:wrap;
  border-top:1px solid rgba(255,255,255,0.08);padding:20px 0 22px;
  font-size:12px;color:#6B7280;
}
.footer-bottom a{color:#9CA3AF;transition:color .2s}
.footer-bottom a:hover{color:#fff}

/* js helper */
.js-only{display:none}

/* responsive */
@media (max-width:1024px){
  .feature-grid{grid-template-columns:repeat(2,1fr)}
  .content-grid{grid-template-columns:repeat(2,1fr)}
  .steps-grid{grid-template-columns:1fr 1fr}
}

@media (max-width:768px){
  .site-header,.header-inner{height:60px}
  .nav-toggle{display:flex}
  .logo-text{font-size:15px}
  .logo-sub{display:none}
  .cta-nav{height:38px;padding:0 16px;font-size:13px}
  .main-nav{
    display:block;position:fixed;top:60px;left:0;right:0;bottom:0;
    background:var(--mist);padding:20px 24px;overflow-y:auto;
    transform:translateX(100%);transition:transform .3s ease;z-index:90;
    border-top:1px solid var(--line);
  }
  .main-nav.open{transform:translateX(0)}
  .nav-chip{display:block;width:100%;height:48px;margin-bottom:8px;justify-content:flex-start;border-radius:12px}
  .hero{padding:56px 0;min-height:520px}
  .hero h1{font-size:30px}
  .hero-sub{font-size:15px}
  .hero-trust span{padding:0 14px}
  .section{padding:56px 0}
  .section-title{font-size:24px}
  .feature-grid{grid-template-columns:1fr}
  .scenario-grid{grid-template-columns:1fr}
  .steps-grid{grid-template-columns:1fr}
  .content-grid{grid-template-columns:1fr}
  .faq-grid{grid-template-columns:1fr}
  .steps-wrap{padding:36px 24px}
  .steps-title,.cta-title{font-size:22px}
  .cta-box{padding:44px 22px}
  .footer-grid{grid-template-columns:1fr;gap:32px;padding-bottom:32px}
  .footer-bottom{flex-direction:column;align-items:flex-start}
  .hero-trust{gap:8px 0}
  .hero-trust span:not(:last-child)::after{display:none}
  .hero-trust span{padding-right:20px}
}

@media (max-width:520px){
  .container{padding:0 18px}
  .hero-actions .btn{width:100%}
  .hero-trust{flex-wrap:wrap}
  .hero-trust span{width:100%;padding:4px 0}
  .content-card-cover{height:180px}
}

/* roulang page: article */
:root {
  --primary: #0E7C7B;
  --primary-dark: #0B5D5A;
  --accent: #FF8A3D;
  --accent-dark: #FF6B4A;
  --bg: #F6F8F7;
  --card-bg: #FFFFFF;
  --dark: #0C1F1E;
  --text: #1F2937;
  --text-muted: #6B7280;
  --text-light: #9CA3AF;
  --border: rgba(11, 93, 90, 0.08);
  --radius-lg: 20px;
  --radius-md: 12px;
  --radius-pill: 999px;
  --shadow-default: 0 8px 30px rgba(11, 93, 90, 0.10);
  --shadow-hover: 0 12px 40px rgba(11, 93, 90, 0.16);
}

* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: ui-sans-serif, "PingFang SC", "HarmonyOS Sans SC", "Microsoft YaHei", sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.75;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
}
a { text-decoration: none; color: var(--primary); transition: color .2s ease; }
a:hover { color: var(--primary-dark); }
img { max-width: 100%; display: block; object-fit: cover; }
button { font-family: inherit; }

/* ===== 导航 ===== */
.site-header {
  position: sticky;
  top: 0;
  background: rgba(246, 248, 247, 0.92);
  -webkit-backdrop-filter: blur(12px);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
  z-index: 50;
  transition: box-shadow .3s ease, background .3s ease;
}
.site-header.scrolled {
  box-shadow: 0 4px 20px rgba(11, 93, 90, 0.06);
  background: rgba(246, 248, 247, 0.96);
}
.logo-mark {
  width: 40px;
  height: 40px;
  background: linear-gradient(135deg, var(--primary), var(--primary-dark));
  color: #fff;
  border-radius: 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 800;
  font-size: 20px;
  flex-shrink: 0;
  box-shadow: 0 4px 12px rgba(14, 124, 123, 0.25);
}
.logo-text {
  font-size: 17px;
  font-weight: 800;
  color: var(--dark);
  letter-spacing: -0.2px;
  white-space: nowrap;
}
.main-nav {
  display: flex;
  align-items: center;
  gap: 8px;
}
.nav-chip {
  display: inline-flex;
  align-items: center;
  height: 36px;
  padding: 0 16px;
  border-radius: 999px;
  font-size: 14px;
  font-weight: 500;
  color: #4B5563;
  background: transparent;
  transition: all .2s ease;
  white-space: nowrap;
  border: none;
  cursor: pointer;
}
.nav-chip:hover {
  background: rgba(14, 124, 123, 0.06);
  color: var(--primary);
}
.nav-chip.active {
  background: var(--primary);
  color: #fff;
  font-weight: 600;
  box-shadow: 0 2px 10px rgba(14, 124, 123, 0.18);
}
.nav-cta {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  height: 40px;
  padding: 0 20px;
  border-radius: 12px;
  background: linear-gradient(135deg, var(--accent), var(--accent-dark));
  color: #fff;
  font-weight: 700;
  font-size: 14px;
  box-shadow: 0 4px 14px rgba(255, 138, 61, 0.35);
  transition: all .25s ease;
  white-space: nowrap;
  flex-shrink: 0;
  border: none;
  cursor: pointer;
}
.nav-cta:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 20px rgba(255, 138, 61, 0.4);
  color: #fff;
  filter: brightness(1.05);
}
.nav-cta:active {
  transform: translateY(0);
  filter: brightness(0.95);
}
.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  width: 44px;
  height: 44px;
  border: none;
  background: transparent;
  cursor: pointer;
  gap: 5px;
  border-radius: 10px;
  transition: background .2s;
}
.nav-toggle:hover { background: rgba(14, 124, 123, 0.06); }
.nav-toggle span {
  display: block;
  width: 20px;
  height: 2px;
  background: var(--dark);
  border-radius: 2px;
  transition: transform .3s ease, opacity .3s ease;
}
.nav-toggle.open span:nth-child(1) { transform: rotate(45deg) translate(5px, 5px); }
.nav-toggle.open span:nth-child(2) { opacity: 0; }
.nav-toggle.open span:nth-child(3) { transform: rotate(-45deg) translate(5px, -5px); }

/* ===== 按钮 ===== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  height: 44px;
  padding: 0 28px;
  border-radius: 12px;
  font-size: 15px;
  font-weight: 700;
  transition: all .3s ease;
  border: none;
  cursor: pointer;
  line-height: 1;
  white-space: nowrap;
}
.btn-primary {
  background: linear-gradient(135deg, var(--accent), var(--accent-dark));
  color: #fff;
  box-shadow: 0 4px 14px rgba(255, 138, 61, 0.3);
}
.btn-primary:hover {
  filter: brightness(1.08);
  transform: translateY(-2px);
  box-shadow: 0 8px 20px rgba(255, 138, 61, 0.35);
  color: #fff;
}
.btn-primary:active {
  transform: translateY(0);
  filter: brightness(0.96);
}
.btn-outline {
  background: #fff;
  border: 1.5px solid var(--primary);
  color: var(--primary);
}
.btn-outline:hover {
  background: rgba(14, 124, 123, 0.05);
  transform: translateY(-2px);
  color: var(--primary);
  box-shadow: 0 6px 18px rgba(14, 124, 123, 0.1);
}
.btn-outline:active {
  transform: translateY(0);
}
.btn-light {
  background: rgba(255, 255, 255, 0.16);
  border: 1px solid rgba(255, 255, 255, 0.55);
  color: #fff;
}
.btn-light:hover {
  background: rgba(255, 255, 255, 0.26);
  color: #fff;
  transform: translateY(-2px);
}
.btn-lg {
  height: 52px;
  padding: 0 36px;
  font-size: 16px;
}

/* ===== 面包屑 ===== */
.breadcrumb {
  padding-top: 28px;
  padding-bottom: 12px;
  font-size: 13px;
  color: var(--text-muted);
}
.breadcrumb a {
  color: var(--text-muted);
  transition: color .2s;
}
.breadcrumb a:hover {
  color: var(--primary);
}
.breadcrumb-sep {
  margin: 0 8px;
  color: #D1D5DB;
}
.breadcrumb-current {
  color: #374151;
  font-weight: 500;
}

/* ===== 文章页 ===== */
.article-header {
  padding-bottom: 20px;
}
.article-header h1 {
  font-size: 30px;
  font-weight: 800;
  line-height: 1.35;
  color: var(--dark);
  letter-spacing: -0.3px;
  margin: 18px 0 0;
}
.article-meta {
  display: flex;
  align-items: center;
  gap: 16px;
  flex-wrap: wrap;
  font-size: 13px;
  color: var(--text-muted);
}
.chip-cat {
  display: inline-flex;
  align-items: center;
  height: 26px;
  padding: 0 12px;
  background: rgba(14, 124, 123, 0.1);
  color: var(--primary-dark);
  border-radius: 999px;
  font-size: 12px;
  font-weight: 600;
}
.meta-item {
  display: inline-flex;
  align-items: center;
  gap: 4px;
}
.article-cover {
  margin: 8px 0 32px;
  border-radius: 20px;
  overflow: hidden;
  box-shadow: var(--shadow-default);
}
.article-cover img {
  width: 100%;
  height: auto;
  aspect-ratio: 16 / 9;
  object-fit: cover;
}
.article-body {
  max-width: 760px;
  font-size: 16px;
  line-height: 1.9;
  color: #1F2937;
}
.article-body h2 {
  font-size: 24px;
  font-weight: 700;
  margin-top: 40px;
  margin-bottom: 16px;
  color: var(--dark);
  line-height: 1.4;
}
.article-body h3 {
  font-size: 20px;
  font-weight: 700;
  margin-top: 32px;
  margin-bottom: 12px;
  color: var(--dark);
}
.article-body p {
  margin-bottom: 24px;
}
.article-body img {
  border-radius: 16px;
  margin: 32px 0;
  box-shadow: var(--shadow-default);
}
.article-body blockquote {
  border-left: 4px solid var(--primary);
  background: #EEF6F5;
  padding: 16px 20px;
  border-radius: 0 12px 12px 0;
  margin: 24px 0 32px;
  color: #374151;
}
.article-body ul {
  list-style: none;
  margin: 0 0 24px;
  padding: 0;
}
.article-body ul li {
  position: relative;
  padding-left: 24px;
  margin-bottom: 10px;
}
.article-body ul li::before {
  content: '';
  position: absolute;
  left: 4px;
  top: 10px;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--primary);
}
.article-body ol {
  padding-left: 20px;
  margin-bottom: 24px;
}
.article-body ol li {
  margin-bottom: 8px;
}
.article-body a {
  color: var(--primary);
  text-decoration: underline;
  text-underline-offset: 3px;
  text-decoration-color: rgba(14, 124, 123, 0.3);
}
.article-body a:hover {
  text-decoration-color: var(--primary);
  color: var(--primary-dark);
}
.article-body table {
  width: 100%;
  border-collapse: collapse;
  margin: 24px 0;
  font-size: 15px;
}
.article-body th {
  background: rgba(14, 124, 123, 0.06);
  color: var(--dark);
  font-weight: 700;
  text-align: left;
  padding: 12px 16px;
  border-bottom: 2px solid rgba(14, 124, 123, 0.15);
}
.article-body td {
  padding: 10px 16px;
  border-bottom: 1px solid rgba(11, 93, 90, 0.08);
}
.not-found {
  text-align: center;
  padding: 70px 24px;
  background: #fff;
  border-radius: 20px;
  box-shadow: var(--shadow-default);
}
.not-found p {
  font-size: 18px;
  color: var(--text-muted);
  margin-bottom: 24px;
}
.article-footer-nav {
  margin-top: 48px;
  padding-top: 24px;
  border-top: 1px solid var(--border);
  display: flex;
  justify-content: center;
  gap: 16px;
  flex-wrap: wrap;
}

/* ===== CTA 条 ===== */
.cta-banner {
  margin: 64px 0 0;
  background: linear-gradient(135deg, var(--primary), var(--primary-dark));
  border-radius: 28px;
  padding: 52px 40px;
  text-align: center;
  position: relative;
  overflow: hidden;
  box-shadow: 0 12px 40px rgba(11, 93, 90, 0.25);
}
.cta-banner::before {
  content: '';
  position: absolute;
  width: 220px;
  height: 220px;
  border-radius: 50%;
  border: 32px solid rgba(255, 255, 255, 0.05);
  top: -70px;
  right: -40px;
  pointer-events: none;
}
.cta-banner::after {
  content: '';
  position: absolute;
  width: 140px;
  height: 140px;
  border-radius: 50%;
  border: 20px solid rgba(255, 255, 255, 0.04);
  bottom: -50px;
  left: -20px;
  pointer-events: none;
}
.cta-inner {
  position: relative;
  z-index: 1;
}
.cta-banner h2 {
  color: #fff;
  font-size: 28px;
  font-weight: 800;
  margin-bottom: 12px;
  letter-spacing: -0.3px;
}
.cta-banner p {
  color: rgba(255, 255, 255, 0.85);
  font-size: 16px;
  margin-bottom: 28px;
  max-width: 560px;
  margin-left: auto;
  margin-right: auto;
}
.cta-buttons {
  display: flex;
  gap: 16px;
  justify-content: center;
  flex-wrap: wrap;
}

/* ===== 页脚 ===== */
.site-footer {
  background: var(--dark);
  color: var(--text-light);
  margin-top: 80px;
  padding-top: 60px;
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1.2fr;
  gap: 48px;
  padding-bottom: 44px;
}
.footer-brand .logo-text {
  color: #fff;
}
.footer-desc {
  margin-top: 16px;
  font-size: 14px;
  color: #9CA3AF;
  line-height: 1.8;
  max-width: 340px;
}
.footer-col h4 {
  color: #fff;
  font-size: 16px;
  font-weight: 700;
  margin-bottom: 18px;
}
.footer-links {
  list-style: none;
  padding: 0;
  margin: 0;
}
.footer-links li {
  margin-bottom: 10px;
}
.footer-links a {
  color: #9CA3AF;
  font-size: 14px;
  transition: color .2s, transform .2s;
  display: inline-block;
}
.footer-links a:hover {
  color: #fff;
  transform: translateX(3px);
}
.footer-safety {
  font-size: 14px;
  color: #9CA3AF;
  line-height: 1.8;
  background: rgba(255, 255, 255, 0.04);
  border-radius: 12px;
  padding: 16px 18px;
  border-left: 3px solid var(--accent);
}
.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  padding: 20px 0;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  font-size: 12px;
  color: #6B7280;
  flex-wrap: wrap;
}
.footer-bottom a {
  color: #6B7280;
  transition: color .2s;
}
.footer-bottom a:hover {
  color: #fff;
}

/* ===== 响应式 ===== */
@media (max-width: 1024px) {
  .main-nav {
    gap: 4px;
  }
  .nav-chip {
    padding: 0 12px;
    font-size: 13px;
  }
  .footer-grid {
    grid-template-columns: 1fr 1fr;
    gap: 36px;
  }
}

@media (max-width: 768px) {
  .site-header {
    height: 60px;
  }
  .main-nav {
    position: fixed;
    top: 60px;
    left: 0;
    right: 0;
    background: #fff;
    flex-direction: column;
    align-items: flex-start;
    padding: 16px 20px;
    gap: 6px;
    box-shadow: 0 12px 30px rgba(0, 0, 0, 0.12);
    display: none;
    z-index: 40;
    border-bottom: 1px solid var(--border);
  }
  .main-nav.open {
    display: flex;
  }
  .nav-chip {
    width: 100%;
    height: 42px;
    padding: 0 14px;
    border-radius: 12px;
    font-size: 14px;
  }
  .nav-toggle {
    display: flex;
  }
  .logo-text {
    font-size: 15px;
  }
  .logo-mark {
    width: 36px;
    height: 36px;
    font-size: 18px;
    border-radius: 14px;
  }
  .article-header h1 {
    font-size: 24px;
  }
  .cta-banner {
    padding: 36px 24px;
    border-radius: 20px;
  }
  .cta-banner h2 {
    font-size: 22px;
  }
  .cta-buttons {
    flex-direction: column;
    width: 100%;
  }
  .cta-buttons .btn {
    width: 100%;
  }
  .footer-grid {
    grid-template-columns: 1fr;
    gap: 32px;
  }
  .footer-bottom {
    flex-direction: column;
    justify-content: center;
    text-align: center;
    gap: 8px;
    padding: 20px 0;
  }
  .footer-desc {
    max-width: none;
  }
  .article-body h2 {
    font-size: 21px;
  }
  .breadcrumb {
    padding-top: 20px;
  }
}

@media (max-width: 520px) {
  .nav-cta {
    height: 36px;
    padding: 0 14px;
    font-size: 13px;
    border-radius: 10px;
  }
  .article-header h1 {
    font-size: 21px;
  }
  .article-meta {
    gap: 10px;
    font-size: 12px;
  }
  .article-cover {
    border-radius: 14px;
    margin-bottom: 24px;
  }
  .btn {
    height: 42px;
    padding: 0 22px;
    font-size: 14px;
  }
  .btn-lg {
    height: 48px;
    padding: 0 28px;
  }
}