/* roulang page: index */
:root {
  --primary: #0E9F8E;
  --primary-dark: #0B7C70;
  --accent: #F5A623;
  --accent-light: #FEF0DC;
  --accent-text: #B87A00;
  --bg: #FAFAF7;
  --bg-white: #FFFFFF;
  --bg-tint: #F0F7F5;
  --text: #1F2A2A;
  --text-secondary: #5B6B6B;
  --text-muted: #8A9A99;
  --border: #E3EBEA;
  --success: #27AE60;
  --error: #E74C3C;
  --radius: 12px;
  --radius-sm: 8px;
  --shadow-sm: 0 2px 8px rgba(31,42,42,0.06);
  --shadow-hover: 0 8px 20px rgba(31,42,42,0.10);
  --transition: all 0.25s ease-out;
  --container: 1200px;
  --header-height: 64px;
  --font-stack: "PingFang SC","Hiragino Sans GB","Microsoft YaHei","Noto Sans CJK SC",sans-serif;
}
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: var(--font-stack);
  font-size: 16px;
  line-height: 1.75;
  color: var(--text);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
  padding-bottom: 64px;
}
img { max-width: 100%; display: block; }
a { color: var(--primary); text-decoration: none; transition: var(--transition); }
a:hover { color: var(--primary-dark); }
ul, ol { padding-left: 1.5em; }
input, button { font-family: inherit; font-size: inherit; }
button { cursor: pointer; border: none; background: none; }
.container { max-width: var(--container); margin: 0 auto; padding: 0 24px; }
.focus-visible:focus-visible, a:focus-visible, button:focus-visible, input:focus-visible, summary:focus-visible {
  outline: 3px solid rgba(245, 166, 35, 0.35);
  outline-offset: 2px;
}
::selection { background: rgba(14, 159, 142, 0.2); }

/* ===== Header & Nav ===== */
.site-header {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 1000;
  height: var(--header-height);
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--border);
}
.header-inner {
  height: var(--header-height);
  display: flex;
  align-items: center;
  gap: 32px;
}
.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
}
.brand-icon {
  width: 32px;
  height: 32px;
  border-radius: 9px;
  background: var(--primary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 800;
  font-size: 17px;
  color: #fff;
  position: relative;
  box-shadow: 0 3px 8px rgba(14, 159, 142, 0.28);
}
.brand-dot::after { content: '3'; }
.brand-text {
  font-size: 20px;
  font-weight: 800;
  color: var(--text);
  letter-spacing: 0.5px;
}
.main-nav {
  display: flex;
  align-items: center;
  gap: 28px;
  flex: 1;
}
.nav-link {
  font-size: 15px;
  font-weight: 600;
  color: var(--text-secondary);
  padding: 8px 2px;
  border-bottom: 2px solid transparent;
  transition: var(--transition);
  position: relative;
}
.nav-link:hover { color: var(--primary); }
.nav-link.active {
  color: var(--primary);
  border-bottom-color: var(--primary);
}
.header-actions {
  display: flex;
  align-items: center;
  gap: 14px;
  flex-shrink: 0;
}
.search-box {
  position: relative;
  display: flex;
  align-items: center;
}
.search-icon {
  position: absolute;
  left: 12px;
  width: 17px;
  height: 17px;
  color: var(--text-muted);
  pointer-events: none;
  transition: var(--transition);
}
.search-input {
  width: 160px;
  height: 40px;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  background: var(--bg-white);
  padding: 0 14px 0 38px;
  font-size: 14px;
  color: var(--text);
  transition: var(--transition);
}
.search-input::placeholder { color: #B0BDBD; }
.search-input:focus {
  width: 240px;
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(245, 166, 35, 0.2);
}
.search-input:focus + .search-icon { color: var(--primary); }
.btn-ghost {
  font-size: 14px;
  font-weight: 600;
  color: var(--text-secondary);
  padding: 8px 6px;
  border-radius: var(--radius-sm);
  transition: var(--transition);
}
.btn-ghost:hover { color: var(--primary); background: rgba(14, 159, 142, 0.06); }
.btn-accent {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  height: 40px;
  padding: 0 24px;
  background: var(--accent);
  color: #fff;
  font-weight: 700;
  font-size: 15px;
  border-radius: var(--radius-sm);
  box-shadow: 0 3px 10px rgba(245, 166, 35, 0.25);
  transition: var(--transition);
}
.btn-accent:hover { background: #df9216; color: #fff; transform: translateY(1px); }
.nav-toggle { display: none; }

/* ===== Hero ===== */
.hero {
  position: relative;
  min-height: 640px;
  display: flex;
  align-items: center;
  color: #fff;
  background: linear-gradient(105deg, rgba(22, 38, 38, 0.92) 0%, rgba(31, 42, 42, 0.72) 55%, rgba(31, 42, 42, 0.35) 100%), url('/assets/images/backpic/back-1.png') center / cover no-repeat;
  padding: 140px 0 100px;
  overflow: hidden;
}
.hero::after {
  content: '';
  position: absolute;
  top: 40px; right: 24px;
  width: 260px; height: 260px;
  background-image: radial-gradient(rgba(255, 255, 255, 0.16) 1px, transparent 1px);
  background-size: 22px 22px;
  pointer-events: none;
}
.hero-content {
  position: relative;
  z-index: 2;
  max-width: 680px;
}
.hero-tag {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(14, 159, 142, 0.2);
  border: 1px solid rgba(14, 159, 142, 0.45);
  color: #e0f5f3;
  font-size: 13px;
  font-weight: 600;
  padding: 6px 16px;
  border-radius: 999px;
  margin-bottom: 24px;
  letter-spacing: 1px;
}
.hero h1 {
  font-size: clamp(34px, 5vw, 54px);
  font-weight: 800;
  line-height: 1.25;
  letter-spacing: 1px;
  margin-bottom: 22px;
  color: #fff;
}
.hero h1 .highlight { color: #F5A623; }
.hero-sub {
  font-size: 18px;
  line-height: 1.8;
  color: rgba(255, 255, 255, 0.88);
  margin-bottom: 38px;
  max-width: 560px;
}
.hero-ctas {
  display: flex;
  align-items: center;
  gap: 16px;
  flex-wrap: wrap;
}
.btn-hero {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  height: 48px;
  padding: 0 30px;
  border-radius: var(--radius-sm);
  font-weight: 700;
  font-size: 16px;
  transition: var(--transition);
}
.btn-hero-primary { background: var(--accent); color: #fff; box-shadow: 0 4px 16px rgba(245, 166, 35, 0.35); }
.btn-hero-primary:hover { background: #df9216; color: #fff; transform: translateY(1px); }
.btn-hero-outline {
  border: 1.5px solid rgba(255, 255, 255, 0.7);
  color: #fff;
  background: transparent;
}
.btn-hero-outline:hover { border-color: var(--accent); color: var(--accent); background: rgba(255, 255, 255, 0.06); }
.hero-scroll {
  position: absolute;
  bottom: 40px;
  left: 50%;
  transform: translateX(-50%);
  color: rgba(255, 255, 255, 0.75);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
  animation: floatDown 2s ease-in-out infinite;
  z-index: 2;
}
.hero-scroll svg { width: 22px; height: 22px; }
@keyframes floatDown {
  0%, 100% { transform: translate(-50%, 0); }
  50% { transform: translate(-50%, 10px); }
}

/* ===== Section Base ===== */
.section { padding: 100px 0; }
.section-tag {
  display: inline-block;
  font-size: 13px;
  font-weight: 700;
  color: var(--primary);
  text-transform: uppercase;
  letter-spacing: 1.5px;
  margin-bottom: 12px;
}
.section-title {
  font-size: clamp(26px, 3vw, 34px);
  font-weight: 800;
  color: var(--text);
  line-height: 1.35;
  margin-bottom: 16px;
}
.section-desc {
  font-size: 16px;
  color: var(--text-secondary);
  max-width: 720px;
  line-height: 1.8;
}

/* ===== Features ===== */
.features { background: var(--bg-white); }
.features-head {
  text-align: center;
  margin-bottom: 64px;
}
.features-head .section-desc { margin: 0 auto; }
.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
  align-items: start;
}
.feature-card {
  position: relative;
  background: var(--bg-white);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 36px 30px 32px;
  box-shadow: var(--shadow-sm);
  transition: var(--transition);
  overflow: hidden;
}
.feature-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 4px;
  height: 100%;
  background: var(--primary);
  border-radius: 0 4px 4px 0;
}
.feature-card:nth-child(2) { margin-top: 40px; }
.feature-card:nth-child(3) { margin-top: 16px; }
.feature-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-hover);
  border-color: var(--primary);
}
.feature-num {
  font-size: 13px;
  font-weight: 800;
  color: var(--primary);
  letter-spacing: 2px;
  display: inline-block;
  background: var(--bg-tint);
  padding: 4px 12px;
  border-radius: 999px;
  margin-bottom: 20px;
  font-variant-numeric: tabular-nums;
}
.feature-icon {
  width: 48px;
  height: 48px;
  border-radius: 12px;
  background: rgba(14, 159, 142, 0.1);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--primary);
  margin-bottom: 18px;
}
.feature-icon svg { width: 24px; height: 24px; }
.feature-title { font-size: 20px; font-weight: 700; margin-bottom: 10px; color: var(--text); }
.feature-desc { font-size: 15px; color: var(--text-secondary); line-height: 1.75; margin-bottom: 18px; }
.feature-link {
  font-size: 14px;
  font-weight: 600;
  color: var(--primary);
  display: inline-flex;
  align-items: center;
  gap: 4px;
  transition: var(--transition);
}
.feature-link:hover { color: var(--primary-dark); gap: 8px; }
.feature-link svg { width: 15px; height: 15px; }

/* ===== Scenario ===== */
.scenario { background: var(--bg-tint); }
.scenario-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  align-items: center;
  gap: 64px;
}
.scenario-copy { padding-right: 20px; }
.scenario-copy .section-desc { margin-bottom: 30px; }
.scenario-visual { position: relative; }
.scenario-img {
  border-radius: 16px;
  box-shadow: var(--shadow-hover);
  width: 100%;
  height: auto;
  object-fit: cover;
  position: relative;
  z-index: 1;
}
.scenario-float-card {
  position: absolute;
  bottom: -22px;
  right: -18px;
  z-index: 2;
  background: var(--bg-white);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 16px 24px;
  box-shadow: var(--shadow-hover);
  display: flex;
  flex-direction: column;
  gap: 2px;
  min-width: 140px;
}
.float-label {
  font-size: 12px;
  color: var(--text-muted);
  font-weight: 600;
}
.float-value {
  font-size: 26px;
  font-weight: 800;
  color: var(--primary);
  font-variant-numeric: tabular-nums;
}
.btn-outline {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  height: 48px;
  padding: 0 30px;
  border: 1.5px solid var(--primary);
  border-radius: var(--radius-sm);
  color: var(--primary);
  font-weight: 700;
  font-size: 16px;
  background: transparent;
  transition: var(--transition);
}
.btn-outline:hover {
  background: rgba(14, 159, 142, 0.08);
  border-color: var(--primary-dark);
  color: var(--primary-dark);
}

/* ===== Social Proof ===== */
.social-proof { background: var(--bg-white); }
.social-head { text-align: center; margin-bottom: 56px; }
.social-head .section-desc { margin: 0 auto; }
.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  background: var(--bg-tint);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 36px 24px;
  margin-bottom: 48px;
}
.stat-item { text-align: center; }
.stat-num {
  font-size: 38px;
  font-weight: 800;
  color: var(--primary);
  font-variant-numeric: tabular-nums;
  line-height: 1.2;
}
.stat-label { font-size: 14px; color: var(--text-secondary); margin-top: 6px; }
.testimonials-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.testimonial-card {
  background: var(--bg-white);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px;
  box-shadow: var(--shadow-sm);
  transition: var(--transition);
}
.testimonial-card:hover {
  box-shadow: var(--shadow-hover);
  transform: translateY(-2px);
  border-color: var(--primary);
}
.testimonial-stars {
  color: var(--accent);
  font-size: 16px;
  letter-spacing: 2px;
  margin-bottom: 12px;
}
.testimonial-text {
  font-size: 15px;
  color: var(--text-secondary);
  line-height: 1.7;
  margin-bottom: 16px;
}
.testimonial-author {
  display: flex;
  align-items: center;
  gap: 10px;
}
.testimonial-avatar {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: var(--bg-tint);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 14px;
  color: var(--primary);
  border: 1px solid var(--border);
}
.testimonial-name { font-size: 14px; font-weight: 600; color: var(--text); }

/* ===== Latest News ===== */
.latest-news { background: var(--bg); }
.latest-news .section-head {
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
  margin-bottom: 48px;
  gap: 24px;
  flex-wrap: wrap;
}
.latest-news .section-head .section-desc { margin-bottom: 0; }
.news-list { display: flex; flex-direction: column; gap: 24px; }
.news-item {
  display: flex;
  gap: 24px;
  background: var(--bg-white);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 18px;
  box-shadow: var(--shadow-sm);
  transition: var(--transition);
}
.news-item:hover {
  box-shadow: var(--shadow-hover);
  transform: translateY(-2px);
  border-color: var(--primary);
}
.news-thumb {
  width: 180px;
  height: 112px;
  flex-shrink: 0;
  border-radius: var(--radius-sm);
  overflow: hidden;
}
.news-thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.3s ease-out;
}
.news-item:hover .news-thumb img { transform: scale(1.04); }
.news-body {
  flex: 1;
  display: flex;
  flex-direction: column;
  justify-content: center;
  min-width: 0;
}
.news-meta {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 8px;
  flex-wrap: wrap;
}
.news-cat {
  font-size: 12px;
  font-weight: 700;
  color: var(--accent-text);
  background: var(--accent-light);
  border-radius: 999px;
  padding: 3px 12px;
}
.news-date {
  font-size: 13px;
  color: var(--text-muted);
}
.news-title {
  font-size: 18px;
  font-weight: 700;
  margin-bottom: 6px;
  line-height: 1.5;
}
.news-title a { color: var(--text); }
.news-title a:hover { color: var(--primary); }
.news-excerpt {
  font-size: 14px;
  color: var(--text-secondary);
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  margin-bottom: 8px;
}
.news-link {
  font-size: 14px;
  font-weight: 600;
  color: var(--primary);
  display: inline-flex;
  align-items: center;
  gap: 4px;
  align-self: flex-start;
  transition: var(--transition);
}
.news-link:hover { gap: 8px; color: var(--primary-dark); }
.news-link svg { width: 15px; height: 15px; }
.empty-state {
  background: var(--bg-white);
  border: 1px dashed var(--border);
  border-radius: var(--radius);
  padding: 80px 24px;
  text-align: center;
  color: var(--text-muted);
}
.empty-state svg {
  width: 40px;
  height: 40px;
  color: var(--border);
  margin-bottom: 14px;
}

/* ===== FAQ ===== */
.faq-section { background: var(--bg-white); }
.faq-head { text-align: center; margin-bottom: 48px; }
.faq-head .section-desc { margin: 0 auto; }
.faq-list { max-width: 800px; margin: 0 auto; }
.faq-item {
  border-bottom: 1px solid var(--border);
  padding: 20px 4px;
  transition: var(--transition);
  border-radius: 8px;
}
.faq-item[open] {
  background: var(--bg-tint);
  padding: 20px 24px;
  border-radius: var(--radius);
  border-bottom-color: transparent;
  margin-bottom: 8px;
}
.faq-item summary {
  cursor: pointer;
  list-style: none;
  font-size: 17px;
  font-weight: 700;
  color: var(--text);
  padding-right: 44px;
  position: relative;
  transition: var(--transition);
  line-height: 1.6;
}
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary:hover { color: var(--primary); }
.faq-item summary::after {
  content: '';
  position: absolute;
  right: 4px;
  top: 50%;
  width: 16px;
  height: 16px;
  transform: translateY(-50%);
  background:
    linear-gradient(0deg, var(--primary), var(--primary)) center / 100% 2px no-repeat,
    linear-gradient(90deg, var(--primary), var(--primary)) center / 2px 100% no-repeat;
  transition: transform 0.25s ease-out;
}
.faq-item[open] summary::after {
  transform: translateY(-50%) rotate(45deg);
  background:
    linear-gradient(0deg, var(--accent), var(--accent)) center / 100% 2px no-repeat,
    linear-gradient(90deg, var(--accent), var(--accent)) center / 2px 100% no-repeat;
}
.faq-a {
  padding: 16px 0 4px;
  font-size: 15px;
  color: var(--text-secondary);
  line-height: 1.8;
}

/* ===== Sticky CTA ===== */
.sticky-cta {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  background: #1F2A2A;
  color: #fff;
  z-index: 999;
  padding: 10px 0;
  box-shadow: 0 -4px 16px rgba(31, 42, 42, 0.18);
}
.sticky-cta-inner {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 20px;
  flex-wrap: wrap;
}
.sticky-text { font-size: 15px; font-weight: 600; }
.sticky-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  height: 40px;
  padding: 0 24px;
  background: var(--accent);
  color: #fff;
  border-radius: var(--radius-sm);
  font-size: 15px;
  font-weight: 700;
  transition: var(--transition);
}
.sticky-btn:hover { background: #df9216; color: #fff; transform: translateY(1px); }
.sticky-close {
  position: absolute;
  right: 16px;
  top: 50%;
  transform: translateY(-50%);
  color: rgba(255, 255, 255, 0.7);
  font-size: 22px;
  line-height: 1;
  width: 36px;
  height: 36px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: var(--transition);
}
.sticky-close:hover { color: #fff; background: rgba(255, 255, 255, 0.12); }

/* ===== Footer ===== */
.site-footer {
  background: #1F2A2A;
  color: #C4D0D0;
  padding: 72px 0 0;
  font-size: 14px;
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr;
  gap: 48px;
  padding-bottom: 48px;
}
.footer-brand .footer-logo {
  font-size: 22px;
  font-weight: 800;
  color: #fff;
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 14px;
}
.footer-brand .footer-logo .brand-icon {
  width: 28px;
  height: 28px;
  font-size: 14px;
}
.footer-brand p { color: #98A9A8; line-height: 1.7; max-width: 280px; }
.footer-links h4 {
  font-size: 15px;
  font-weight: 700;
  color: #fff;
  margin-bottom: 16px;
}
.footer-links a {
  display: block;
  color: #C4D0D0;
  padding: 5px 0;
  transition: var(--transition);
}
.footer-links a:hover { color: var(--accent); }
.footer-links span {
  display: block;
  color: #98A9A8;
  padding: 5px 0;
}
.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  padding: 22px 0;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
  color: #8A9A99;
  font-size: 13px;
}
.footer-bottom a { color: #C4D0D0; }
.footer-bottom a:hover { color: var(--accent); }

/* ===== Responsive ===== */
@media (max-width: 1024px) {
  .features-grid { gap: 20px; }
  .feature-card { padding: 28px 24px; }
  .header-inner { gap: 20px; }
  .search-input { width: 140px; }
  .search-input:focus { width: 190px; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 768px) {
  body { padding-bottom: 56px; }
  .container { padding: 0 16px; }
  .section { padding: 68px 0; }
  .header-inner { gap: 12px; justify-content: space-between; }
  .brand-text { font-size: 18px; }
  .main-nav {
    position: fixed;
    top: var(--header-height);
    left: 0;
    right: 0;
    background: var(--bg-white);
    border-bottom: 1px solid var(--border);
    box-shadow: var(--shadow-hover);
    display: none;
    flex-direction: column;
    align-items: stretch;
    padding: 16px 24px;
    gap: 4px;
    z-index: 999;
  }
  .main-nav.open { display: flex; }
  .nav-link {
    padding: 12px 4px;
    font-size: 16px;
    border-bottom: 1px solid var(--border);
  }
  .nav-link.active { border-bottom-color: var(--primary); }
  .nav-toggle {
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    width: 44px;
    height: 44px;
    gap: 5px;
    flex-shrink: 0;
  }
  .nav-toggle span {
    display: block;
    width: 22px;
    height: 2px;
    background: var(--text);
    border-radius: 2px;
    transition: var(--transition);
  }
  .nav-toggle.active span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
  .nav-toggle.active span:nth-child(2) { opacity: 0; }
  .nav-toggle.active span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }
  .search-box { display: none; }
  .btn-ghost { display: none; }
  .btn-accent { height: 40px; padding: 0 18px; font-size: 14px; }
  .hero { padding: 120px 0 90px; min-height: 540px; }
  .hero h1 { font-size: 32px; }
  .hero-sub { font-size: 16px; }
  .features-grid { grid-template-columns: 1fr; }
  .feature-card:nth-child(2) { margin-top: 0; }
  .feature-card:nth-child(3) { margin-top: 0; }
  .scenario-grid { grid-template-columns: 1fr; gap: 48px; }
  .scenario-copy { padding-right: 0; }
  .scenario-float-card { right: 8px; bottom: -18px; }
  .stats-grid { grid-template-columns: repeat(2, 1fr); gap: 20px; }
  .testimonials-grid { grid-template-columns: 1fr; }
  .news-item { flex-direction: column; padding: 14px; gap: 14px; }
  .news-thumb { width: 100%; height: 140px; }
  .news-title { font-size: 17px; }
  .footer-grid { grid-template-columns: 1fr; gap: 32px; }
  .sticky-cta-inner { flex-direction: column; gap: 8px; padding: 8px 40px; }
  .sticky-text { font-size: 14px; }
  .sticky-btn { width: 100%; max-width: 280px; }
  .sticky-close { right: 8px; }
}

@media (max-width: 520px) {
  .btn-accent { padding: 0 14px; font-size: 13px; }
  .hero { padding: 110px 0 80px; }
  .hero h1 { font-size: 28px; line-height: 1.4; }
  .hero-sub { font-size: 15px; }
  .news-thumb { height: 120px; }
  .stats-grid { grid-template-columns: repeat(2, 1fr); padding: 24px 12px; }
  .stat-num { font-size: 30px; }
  .footer-bottom { flex-direction: column; text-align: center; }
}

/* roulang page: category1 */
/* ========== 设计变量 ========== */
:root {
  --primary: #0E9F8E;
  --primary-dark: #0B7C70;
  --accent: #F5A623;
  --accent-dark: #E0940E;
  --bg: #FAFAF7;
  --bg-white: #FFFFFF;
  --bg-mist: #F0F7F5;
  --text-main: #1F2A2A;
  --text-secondary: #5B6B6B;
  --text-muted: #8A9A99;
  --border: #E3EBEA;
  --success: #27AE60;
  --error: #E74C3C;
  --radius-btn: 8px;
  --radius-card: 12px;
  --radius-sm: 8px;
  --shadow-base: 0 2px 8px rgba(31,42,42,0.06);
  --shadow-hover: 0 8px 20px rgba(31,42,42,0.10);
  --transition: all 0.25s ease-out;
  --header-height: 64px;
  --container: 1200px;
}

/* ========== Reset & Base ========== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans CJK SC", sans-serif;
  font-size: 16px;
  line-height: 1.75;
  color: var(--text-main);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}
img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; transition: var(--transition); }
ul, ol { list-style: none; }
button { font-family: inherit; cursor: pointer; border: none; background: none; }
input { font-family: inherit; }
h1, h2, h3, h4 { font-weight: 700; line-height: 1.3; }

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

/* ========== 按钮 ========== */
.btn-primary,
.btn-accent {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  height: 48px;
  padding: 0 28px;
  font-size: 16px;
  font-weight: 600;
  border-radius: var(--radius-btn);
  transition: var(--transition);
  white-space: nowrap;
  border: none;
}
.btn-accent {
  background: var(--accent);
  color: #fff;
}
.btn-accent:hover {
  background: var(--accent-dark);
  transform: translateY(1px);
  box-shadow: 0 6px 16px rgba(245,166,35,0.3);
}
.btn-outline {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  height: 48px;
  padding: 0 28px;
  font-size: 16px;
  font-weight: 600;
  border-radius: var(--radius-btn);
  border: 1.5px solid rgba(255,255,255,0.7);
  color: #fff;
  background: transparent;
  transition: var(--transition);
  white-space: nowrap;
}
.btn-outline:hover {
  border-color: var(--primary);
  background: rgba(14,159,142,0.15);
  transform: translateY(1px);
}
.btn-outline-dark {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  height: 48px;
  padding: 0 28px;
  font-size: 16px;
  font-weight: 600;
  border-radius: var(--radius-btn);
  border: 1.5px solid var(--border);
  color: var(--text-main);
  background: transparent;
  transition: var(--transition);
}
.btn-outline-dark:hover {
  border-color: var(--primary);
  background: rgba(14,159,142,0.06);
  color: var(--primary-dark);
}
.btn-sm {
  height: 36px;
  padding: 0 18px;
  font-size: 14px;
  border-radius: 6px;
}
a:focus-visible,
button:focus-visible,
input:focus-visible {
  outline: 3px solid rgba(245,166,35,0.35);
  outline-offset: 2px;
}

/* ========== 徽章/标签 ========== */
.badge {
  display: inline-flex;
  align-items: center;
  padding: 3px 14px;
  font-size: 13px;
  font-weight: 500;
  border-radius: 999px;
  background: #FEF0DC;
  color: #B87A00;
  line-height: 1.5;
}
.badge-primary {
  background: #E0F5F3;
  color: var(--primary-dark);
}
.badge-light {
  background: rgba(255,255,255,0.14);
  color: #fff;
  border: 1px solid rgba(255,255,255,0.25);
}

/* ========== Header / Nav ========== */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  height: var(--header-height);
  background: rgba(255,255,255,0.92);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--border);
}
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: var(--header-height);
  gap: 20px;
}
.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
}
.brand-icon {
  width: 30px;
  height: 30px;
  border-radius: 8px;
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-weight: 800;
  font-size: 16px;
  position: relative;
  flex-shrink: 0;
}
.brand-icon::after {
  content: "3";
  font-size: 15px;
  font-weight: 800;
  color: #fff;
  line-height: 1;
  margin-top: 1px;
}
.brand-text {
  font-size: 18px;
  font-weight: 800;
  color: var(--text-main);
  letter-spacing: 0.5px;
}
.main-nav {
  display: flex;
  align-items: center;
  gap: 6px;
  flex: 1;
  justify-content: center;
}
.nav-link {
  display: block;
  padding: 8px 16px;
  font-size: 15px;
  font-weight: 500;
  color: var(--text-secondary);
  border-radius: 6px;
  transition: var(--transition);
  white-space: nowrap;
}
.nav-link:hover {
  color: var(--primary);
  background: rgba(14,159,142,0.06);
}
.nav-link.active {
  color: var(--primary-dark);
  font-weight: 600;
}
.header-actions {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-shrink: 0;
}
.search-box {
  position: relative;
  display: flex;
  align-items: center;
}
.search-icon {
  position: absolute;
  left: 12px;
  width: 17px;
  height: 17px;
  color: var(--text-muted);
  pointer-events: none;
}
.search-input {
  width: 160px;
  height: 36px;
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 0 12px 0 36px;
  font-size: 14px;
  color: var(--text-main);
  background: #fff;
  transition: var(--transition);
  outline: none;
}
.search-input:focus {
  width: 240px;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(14,159,142,0.12);
}
.search-input::placeholder { color: #B0BDBD; }
.btn-ghost {
  display: inline-flex;
  align-items: center;
  height: 36px;
  padding: 0 14px;
  font-size: 14px;
  font-weight: 500;
  color: var(--text-secondary);
  border-radius: 6px;
  transition: var(--transition);
  white-space: nowrap;
}
.btn-ghost:hover {
  color: var(--primary);
  background: rgba(14,159,142,0.06);
}
.btn-accent.small {
  height: 40px;
  padding: 0 22px;
  font-size: 14px;
}
.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 44px;
  height: 44px;
  padding: 0 10px;
  border-radius: 8px;
}
.nav-toggle span {
  display: block;
  height: 2px;
  width: 22px;
  background: var(--text-main);
  border-radius: 2px;
  transition: var(--transition);
}
.nav-toggle:hover span { background: var(--primary); }

/* ========== Hero ========== */
.hero {
  position: relative;
  min-height: 78vh;
  display: flex;
  align-items: center;
  background-image: url('/assets/images/backpic/back-1.png');
  background-size: cover;
  background-position: center;
  background-repeat: no-repeat;
  padding: calc(var(--header-height) + 40px) 0 80px;
  isolation: isolate;
}
.hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(100deg, rgba(20,32,32,0.86) 0%, rgba(20,32,32,0.66) 45%, rgba(20,32,32,0.28) 100%);
  z-index: -1;
}
.hero-content {
  max-width: 620px;
  color: #fff;
}
.hero-badge {
  display: inline-flex;
  align-items: center;
  padding: 5px 16px;
  font-size: 13px;
  font-weight: 500;
  border-radius: 999px;
  background: rgba(255,255,255,0.12);
  border: 1px solid rgba(255,255,255,0.22);
  color: rgba(255,255,255,0.92);
  margin-bottom: 24px;
  letter-spacing: 0.5px;
}
.hero h1 {
  font-size: clamp(36px, 5vw, 56px);
  font-weight: 800;
  line-height: 1.2;
  margin-bottom: 18px;
  letter-spacing: 0.5px;
}
.hero h1 span {
  color: var(--accent);
}
.hero-desc {
  font-size: 17px;
  line-height: 1.8;
  color: rgba(255,255,255,0.88);
  margin-bottom: 34px;
  max-width: 540px;
}
.hero-actions {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}
.scroll-indicator {
  position: absolute;
  bottom: 28px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  color: rgba(255,255,255,0.7);
  font-size: 13px;
  gap: 6px;
  animation: floatDown 2s ease-in-out infinite;
}
.scroll-indicator .arrow {
  width: 20px;
  height: 20px;
  border-right: 2px solid rgba(255,255,255,0.7);
  border-bottom: 2px solid rgba(255,255,255,0.7);
  transform: rotate(45deg);
}
@keyframes floatDown {
  0%, 100% { transform: translateX(-50%) translateY(0); }
  50% { transform: translateX(-50%) translateY(8px); }
}

/* ========== Section 通用 ========== */
.section {
  padding: 80px 0;
}
.section-mist {
  background: var(--bg-mist);
}
.section-white {
  background: var(--bg-white);
}
.section-head {
  text-align: center;
  max-width: 680px;
  margin: 0 auto 52px;
}
.section-head .badge {
  margin-bottom: 14px;
}
.section-head h2 {
  font-size: 32px;
  font-weight: 800;
  color: var(--text-main);
  margin-bottom: 14px;
}
.section-head p {
  color: var(--text-secondary);
  font-size: 16px;
  line-height: 1.75;
}

/* ========== 分类简介 ========== */
.cat-intro {
  padding: 72px 0 40px;
  background: var(--bg);
}
.cat-intro-card {
  background: var(--bg-white);
  border: 1px solid var(--border);
  border-radius: var(--radius-card);
  padding: 36px 40px;
  display: flex;
  gap: 30px;
  align-items: flex-start;
  box-shadow: var(--shadow-base);
  position: relative;
  overflow: hidden;
}
.cat-intro-card::before {
  content: '';
  position: absolute;
  width: 4px;
  height: 100%;
  left: 0;
  top: 0;
  background: linear-gradient(180deg, var(--primary), var(--primary-dark));
}
.cat-intro-card .cat-num {
  font-size: 44px;
  font-weight: 800;
  color: var(--primary);
  line-height: 1;
  font-variant-numeric: tabular-nums;
  flex-shrink: 0;
  opacity: 0.85;
}
.cat-intro-card h2 {
  font-size: 24px;
  margin-bottom: 10px;
  color: var(--text-main);
}
.cat-intro-card p {
  color: var(--text-secondary);
  font-size: 15px;
  line-height: 1.8;
  max-width: 760px;
}

/* ========== 内容方向卡片 ========== */
.content-cards {
  padding: 56px 0 80px;
  background: var(--bg);
}
.cards-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}
.content-card {
  background: var(--bg-white);
  border: 1px solid var(--border);
  border-radius: var(--radius-card);
  overflow: hidden;
  transition: var(--transition);
  box-shadow: var(--shadow-base);
  display: flex;
  flex-direction: column;
}
.content-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-hover);
  border-color: rgba(14,159,142,0.3);
}
.card-thumb {
  position: relative;
  aspect-ratio: 4 / 3;
  overflow: hidden;
  background: var(--bg-mist);
}
.card-thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.4s ease-out;
}
.content-card:hover .card-thumb img {
  transform: scale(1.05);
}
.card-thumb .badge {
  position: absolute;
  top: 12px;
  left: 12px;
  background: rgba(255,255,255,0.88);
  color: var(--primary-dark);
  backdrop-filter: blur(4px);
}
.card-body {
  padding: 20px 20px 18px;
  display: flex;
  flex-direction: column;
  flex: 1;
}
.card-body h3 {
  font-size: 17px;
  font-weight: 700;
  margin-bottom: 8px;
  color: var(--text-main);
  line-height: 1.45;
}
.card-body p {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.7;
  flex: 1;
  margin-bottom: 14px;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.card-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 14px;
  border-top: 1px solid var(--border);
}
.card-meta .date {
  font-size: 13px;
  color: var(--text-muted);
  font-variant-numeric: tabular-nums;
}
.card-meta .more {
  font-size: 14px;
  font-weight: 600;
  color: var(--primary);
  display: inline-flex;
  align-items: center;
  gap: 4px;
}
.card-meta .more::after {
  content: '→';
  transition: transform 0.2s ease-out;
}
.card-meta .more:hover::after {
  transform: translateX(3px);
}

/* 空状态 */
.empty-state {
  grid-column: 1 / -1;
  text-align: center;
  padding: 64px 24px;
  background: var(--bg-white);
  border: 1px dashed var(--border);
  border-radius: var(--radius-card);
  color: var(--text-muted);
  font-size: 15px;
}
.empty-state .empty-icon {
  font-size: 44px;
  display: block;
  margin-bottom: 16px;
  opacity: 0.4;
}

/* ========== 核心价值 错层编号卡 ========== */
.value-section {
  padding: 80px 0;
  background: var(--bg-white);
}
.value-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  align-items: start;
}
.value-card {
  background: var(--bg-white);
  border: 1px solid var(--border);
  border-radius: var(--radius-card);
  padding: 36px 28px 30px;
  position: relative;
  box-shadow: var(--shadow-base);
  transition: var(--transition);
  overflow: hidden;
}
.value-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 4px;
  height: 100%;
  background: linear-gradient(180deg, var(--primary), var(--primary-dark));
  opacity: 0;
  transition: var(--transition);
}
.value-card:hover::before {
  opacity: 1;
}
.value-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-hover);
  border-color: rgba(14,159,142,0.2);
}
.value-card:nth-child(2) {
  margin-top: 24px;
}
.value-num {
  font-size: 52px;
  font-weight: 800;
  color: var(--border);
  line-height: 1;
  margin-bottom: 18px;
  font-variant-numeric: tabular-nums;
  transition: var(--transition);
}
.value-card:hover .value-num {
  color: rgba(14,159,142,0.25);
}
.value-card h3 {
  font-size: 20px;
  font-weight: 700;
  margin-bottom: 12px;
  color: var(--text-main);
}
.value-card p {
  font-size: 15px;
  color: var(--text-secondary);
  line-height: 1.75;
}
.value-icon {
  position: absolute;
  top: 28px;
  right: 24px;
  width: 48px;
  height: 48px;
  border-radius: 12px;
  background: var(--bg-mist);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 20px;
  color: var(--primary);
}
.value-card:nth-child(2) .value-icon {
  background: #FEF0DC;
  color: #B87A00;
}
.value-card:nth-child(3) .value-icon {
  background: #E0F5F3;
  color: var(--primary-dark);
}

/* ========== 适用人群 ========== */
.audience-section {
  padding: 80px 0;
  background: var(--bg-mist);
}
.audience-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.audience-card {
  background: var(--bg-white);
  border: 1px solid var(--border);
  border-radius: var(--radius-card);
  padding: 30px 26px;
  text-align: center;
  transition: var(--transition);
  box-shadow: var(--shadow-base);
}
.audience-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-hover);
  border-color: rgba(14,159,142,0.2);
}
.audience-avatar {
  width: 60px;
  height: 60px;
  border-radius: 16px;
  background: linear-gradient(135deg, var(--primary), var(--primary-dark));
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 24px;
  margin: 0 auto 18px;
  color: #fff;
}
.audience-card:nth-child(2) .audience-avatar {
  background: linear-gradient(135deg, #F5A623, #E0940E);
}
.audience-card:nth-child(3) .audience-avatar {
  background: linear-gradient(135deg, #3FA9A0, #0E9F8E);
}
.audience-card h3 {
  font-size: 18px;
  font-weight: 700;
  margin-bottom: 10px;
  color: var(--text-main);
}
.audience-card p {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.7;
}

/* ========== 阅读路径 流程 ========== */
.process-section {
  padding: 80px 0;
  background: var(--bg-white);
}
.process-steps {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  counter-reset: step;
}
.process-step {
  position: relative;
  background: var(--bg-white);
  border: 1px solid var(--border);
  border-radius: var(--radius-card);
  padding: 30px 24px 26px;
  text-align: center;
  box-shadow: var(--shadow-base);
  transition: var(--transition);
}
.process-step:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-hover);
  border-color: rgba(14,159,142,0.2);
}
.process-step .step-num {
  width: 36px;
  height: 36px;
  border-radius: 10px;
  background: var(--primary);
  color: #fff;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 16px;
  font-size: 15px;
  font-variant-numeric: tabular-nums;
}
.process-step:nth-child(2) .step-num {
  background: var(--accent);
}
.process-step:nth-child(3) .step-num {
  background: var(--primary-dark);
}
.process-step:nth-child(4) .step-num {
  background: #3FA9A0;
}
.process-step h3 {
  font-size: 17px;
  font-weight: 700;
  margin-bottom: 8px;
  color: var(--text-main);
}
.process-step p {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.7;
}
.process-step::after {
  content: '→';
  position: absolute;
  top: 50%;
  right: -20px;
  transform: translateY(-50%);
  font-size: 20px;
  color: var(--text-muted);
  z-index: 2;
}
.process-step:last-child::after {
  display: none;
}

/* ========== FAQ ========== */
.faq-section {
  padding: 80px 0;
  background: var(--bg-mist);
}
.faq-list {
  max-width: 800px;
  margin: 0 auto;
}
.faq-item {
  border-bottom: 1px solid var(--border);
  transition: background 0.25s ease-out;
}
.faq-item:last-child {
  border-bottom: none;
}
.faq-item.open {
  background: rgba(240,247,245,0.7);
}
.faq-question {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 20px 8px;
  cursor: pointer;
  width: 100%;
  text-align: left;
}
.faq-question h3 {
  font-size: 17px;
  font-weight: 600;
  color: var(--text-main);
  flex: 1;
  line-height: 1.5;
}
.faq-toggle {
  position: relative;
  width: 20px;
  height: 20px;
  flex-shrink: 0;
}
.faq-toggle::before,
.faq-toggle::after {
  content: '';
  position: absolute;
  background: var(--text-secondary);
  border-radius: 2px;
  transition: var(--transition);
}
.faq-toggle::before {
  width: 2px;
  height: 20px;
  top: 0;
  left: 9px;
}
.faq-toggle::after {
  width: 20px;
  height: 2px;
  top: 9px;
  left: 0;
}
.faq-item.open .faq-toggle::before {
  transform: rotate(45deg);
  opacity: 0;
}
.faq-item.open .faq-toggle::after {
  background: var(--primary);
}
.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.3s ease-out, padding 0.3s ease-out;
  padding: 0 8px;
}
.faq-item.open .faq-answer {
  max-height: 300px;
  padding: 0 8px 20px;
}
.faq-answer p {
  font-size: 15px;
  color: var(--text-secondary);
  line-height: 1.75;
}

/* ========== CTA ========== */
.cta-section {
  padding: 70px 0;
  background: linear-gradient(120deg, #1F2A2A 0%, #253535 100%);
  color: #fff;
  text-align: center;
}
.cta-inner {
  max-width: 680px;
  margin: 0 auto;
}
.cta-inner h2 {
  font-size: 32px;
  font-weight: 800;
  margin-bottom: 16px;
  color: #fff;
}
.cta-inner p {
  font-size: 16px;
  color: rgba(255,255,255,0.8);
  margin-bottom: 30px;
  line-height: 1.8;
}
.cta-actions {
  display: flex;
  gap: 16px;
  justify-content: center;
  flex-wrap: wrap;
}
.cta-actions .btn-outline {
  border-color: rgba(255,255,255,0.45);
}
.cta-actions .btn-outline:hover {
  border-color: var(--primary);
  background: rgba(14,159,142,0.2);
}

/* ========== Footer ========== */
.site-footer {
  background: #1F2A2A;
  color: #C4D0D0;
  padding: 60px 0 0;
  font-size: 14px;
}
.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: 40px;
  padding-bottom: 40px;
}
.footer-brand .footer-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 16px;
}
.footer-logo .brand-icon {
  background: linear-gradient(135deg, var(--primary), var(--primary-dark));
}
.footer-logo span:last-child {
  font-size: 18px;
  font-weight: 700;
  color: #fff;
}
.footer-brand p {
  color: #9AA8A8;
  line-height: 1.7;
  max-width: 300px;
}
.footer-links h4 {
  color: #fff;
  font-size: 15px;
  font-weight: 600;
  margin-bottom: 14px;
}
.footer-links a,
.footer-links span {
  display: block;
  color: #9AA8A8;
  font-size: 14px;
  margin-bottom: 10px;
  transition: var(--transition);
  cursor: default;
}
.footer-links a:hover {
  color: var(--primary);
  padding-left: 4px;
}
.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.1);
  padding: 20px 0;
  text-align: center;
  color: #7A8A8A;
  font-size: 13px;
}

/* ========== 响应式 ========== */
@media (max-width: 1024px) {
  .cards-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .value-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .value-card:nth-child(3) {
    grid-column: 1 / -1;
    margin-top: 0;
  }
  .value-card:nth-child(2) {
    margin-top: 0;
  }
  .audience-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .process-steps {
    grid-template-columns: repeat(2, 1fr);
  }
  .process-step::after {
    display: none;
  }
  .cat-intro-card {
    padding: 28px 28px;
  }
}

@media (max-width: 768px) {
  .container {
    padding-left: 16px;
    padding-right: 16px;
  }
  .site-header {
    height: 60px;
  }
  .header-inner {
    height: 60px;
  }
  .main-nav {
    position: fixed;
    top: 60px;
    left: 0;
    right: 0;
    background: #fff;
    flex-direction: column;
    align-items: stretch;
    padding: 16px;
    gap: 4px;
    border-bottom: 1px solid var(--border);
    box-shadow: 0 8px 20px rgba(31,42,42,0.08);
    display: none;
    max-height: calc(100vh - 60px);
    overflow-y: auto;
  }
  .main-nav.open {
    display: flex;
  }
  .nav-link {
    padding: 12px 16px;
    font-size: 16px;
  }
  .nav-toggle {
    display: flex;
  }
  .header-actions .btn-ghost {
    display: none;
  }
  .search-input {
    width: 130px;
  }
  .search-input:focus {
    width: 160px;
  }
  .hero {
    min-height: 70vh;
    padding-top: calc(var(--header-height) + 20px);
  }
  .hero h1 {
    font-size: 30px;
  }
  .hero-desc {
    font-size: 15px;
  }
  .hero-actions {
    flex-direction: column;
    align-items: flex-start;
    width: 100%;
  }
  .hero-actions .btn-accent,
  .hero-actions .btn-outline {
    width: 100%;
  }
  .section {
    padding: 56px 0;
  }
  .section-head h2 {
    font-size: 26px;
  }
  .cards-grid {
    grid-template-columns: 1fr;
  }
  .value-grid {
    grid-template-columns: 1fr;
  }
  .value-card:nth-child(2) {
    margin-top: 0;
  }
  .value-card:nth-child(3) {
    grid-column: auto;
  }
  .audience-grid {
    grid-template-columns: 1fr;
  }
  .process-steps {
    grid-template-columns: 1fr;
  }
  .cat-intro-card {
    flex-direction: column;
    gap: 12px;
    padding: 24px 20px;
  }
  .cat-intro-card .cat-num {
    font-size: 36px;
  }
  .cta-inner h2 {
    font-size: 26px;
  }
  .footer-grid {
    grid-template-columns: 1fr;
    gap: 32px;
  }
}

@media (max-width: 520px) {
  .header-actions .btn-accent.small {
    display: none;
  }
  .search-box {
    display: none;
  }
  .header-actions {
    gap: 4px;
  }
  .brand-text {
    font-size: 16px;
  }
  .hero {
    background-position: 70% center;
  }
  .cta-actions {
    flex-direction: column;
    width: 100%;
  }
  .cta-actions .btn-accent,
  .cta-actions .btn-outline {
    width: 100%;
  }
}

/* roulang page: article */
:root {
  --primary: #0E9F8E;
  --primary-dark: #0B7C70;
  --accent: #F5A623;
  --bg: #FAFAF7;
  --white: #fff;
  --bg-soft: #F0F7F5;
  --text: #1F2A2A;
  --text-secondary: #5B6B6B;
  --text-light: #8A9A99;
  --border: #E3EBEA;
  --success: #27AE60;
  --error: #E74C3C;
  --radius-btn: 8px;
  --radius-card: 12px;
  --shadow-sm: 0 2px 8px rgba(31,42,42,0.06);
  --shadow-hover: 0 8px 20px rgba(31,42,42,0.10);
  --header-height: 64px;
  --font-family: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans CJK SC", sans-serif;
}
* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { font-family: var(--font-family); background: var(--bg); color: var(--text); font-size: 16px; line-height: 1.75; -webkit-font-smoothing: antialiased; }
img { max-width: 100%; display: block; }
a { color: var(--primary); text-decoration: none; transition: color .25s ease; }
a:hover { color: var(--primary-dark); }
button { font-family: inherit; cursor: pointer; border: none; background: none; }
input, textarea { font-family: inherit; }
.container { max-width: 1200px; margin: 0 auto; padding-left: 24px; padding-right: 24px; }
.container-narrow { max-width: 760px; }

/* Header */
.site-header { position: sticky; top: 0; z-index: 100; background: rgba(255,255,255,.92); backdrop-filter: blur(14px); -webkit-backdrop-filter: blur(14px); border-bottom: 1px solid var(--border); height: 64px; }
.header-inner { display: flex; align-items: center; justify-content: space-between; height: 64px; gap: 24px; }
.brand { display: inline-flex; align-items: center; gap: 10px; font-size: 19px; font-weight: 800; color: var(--text); white-space: nowrap; }
.brand:hover { color: var(--text); }
.brand-icon { width: 30px; height: 30px; border-radius: 9px; background: var(--primary); display: inline-flex; align-items: center; justify-content: center; color: #fff; font-weight: 800; font-size: 15px; position: relative; }
.brand-icon::after { content: "3"; font-size: 16px; font-weight: 800; }
.main-nav { display: flex; align-items: center; gap: 8px; }
.nav-link { display: inline-flex; align-items: center; height: 38px; padding: 0 16px; border-radius: 999px; font-size: 15px; font-weight: 500; color: var(--text-secondary); }
.nav-link:hover { color: var(--primary); background: var(--bg-soft); }
.nav-link.active { color: var(--primary); background: var(--bg-soft); font-weight: 600; }
.header-actions { display: flex; align-items: center; gap: 14px; }
.search-box { position: relative; display: flex; align-items: center; }
.search-icon { position: absolute; left: 12px; width: 16px; height: 16px; color: var(--text-light); pointer-events: none; }
.search-input { width: 160px; height: 38px; border: 1px solid var(--border); background: var(--white); border-radius: 999px; padding: 0 16px 0 38px; font-size: 13px; color: var(--text); outline: none; transition: all .25s ease; }
.search-input:focus { width: 240px; border-color: var(--primary); box-shadow: 0 0 0 3px rgba(14,159,142,.15); }
.btn-ghost { display: inline-flex; align-items: center; justify-content: center; height: 38px; padding: 0 14px; border-radius: 8px; font-size: 14px; color: var(--text-secondary); font-weight: 500; }
.btn-ghost:hover { color: var(--primary); background: var(--bg-soft); }
.btn-accent { display: inline-flex; align-items: center; justify-content: center; height: 40px; padding: 0 22px; border-radius: 8px; background: var(--accent); color: #fff; font-size: 14px; font-weight: 600; transition: all .25s ease; white-space: nowrap; }
.btn-accent:hover { background: #e29415; color: #fff; transform: translateY(1px); box-shadow: 0 8px 20px rgba(245,166,35,.35); }
.nav-toggle { display: none; flex-direction: column; justify-content: center; align-items: center; gap: 5px; width: 40px; height: 40px; border-radius: 8px; padding: 0; flex-shrink: 0; }
.nav-toggle span { display: block; width: 20px; height: 2px; background: var(--text); border-radius: 2px; transition: all .3s ease; }
.nav-toggle.active span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-toggle.active span:nth-child(2) { opacity: 0; }
.nav-toggle.active span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* Buttons */
.btn { display: inline-flex; align-items: center; justify-content: center; gap: 8px; height: 48px; padding: 0 28px; border-radius: var(--radius-btn); font-size: 16px; font-weight: 600; transition: all .25s ease; }
.btn-accent-lg { background: var(--accent); color: #fff; }
.btn-accent-lg:hover { background: #e29415; color: #fff; transform: translateY(1px); box-shadow: 0 8px 20px rgba(245,166,35,.35); }
.btn-outline { background: transparent; border: 1.5px solid var(--primary); color: var(--primary); }
.btn-outline:hover { background: rgba(14,159,142,.10); border-color: var(--primary); color: var(--primary); }
.btn-outline-light { background: transparent; border: 1.5px solid rgba(255,255,255,.7); color: #fff; }
.btn-outline-light:hover { background: rgba(255,255,255,.12); border-color: #fff; color: #fff; }

/* Badge */
.badge { display: inline-flex; align-items: center; gap: 6px; height: 24px; padding: 0 12px; border-radius: 999px; font-size: 12px; font-weight: 600; background: #FEF0DC; color: #B87A00; white-space: nowrap; }
.badge-primary { background: #E0F5F3; color: var(--primary-dark); }

/* Page Hero */
.page-hero { background: linear-gradient(135deg, rgba(31,42,42,.86) 0%, rgba(11,124,112,.68) 100%), url('/assets/images/backpic/back-1.png') center/cover no-repeat; padding: 44px 0 36px; color: #fff; }
.hero-badge { display: inline-flex; align-items: center; gap: 6px; height: 28px; padding: 0 12px; border-radius: 999px; background: rgba(255,255,255,.14); color: #fff; font-size: 12px; font-weight: 600; margin-bottom: 14px; }
.breadcrumb { display: flex; align-items: center; flex-wrap: wrap; gap: 8px; font-size: 13px; color: rgba(255,255,255,.72); }
.breadcrumb a { color: rgba(255,255,255,.72); }
.breadcrumb a:hover { color: #fff; }
.breadcrumb-sep { color: rgba(255,255,255,.4); }
.breadcrumb-current { color: rgba(255,255,255,.9); max-width: 400px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }

/* Article */
.article-section { padding: 48px 0 16px; }
.article-card { background: var(--white); border: 1px solid var(--border); border-radius: var(--radius-card); box-shadow: var(--shadow-sm); padding: 48px 56px; margin-bottom: 32px; }
.article-title { font-size: clamp(26px, 4vw, 36px); font-weight: 800; line-height: 1.35; color: var(--text); margin-bottom: 16px; }
.article-meta { display: flex; align-items: center; flex-wrap: wrap; gap: 16px; margin-bottom: 32px; padding-bottom: 20px; border-bottom: 1px solid var(--border); }
.meta-item { display: inline-flex; align-items: center; gap: 6px; font-size: 13px; color: var(--text-light); }
.meta-item svg { width: 14px; height: 14px; }

/* Article Content */
.article-content { font-size: 16px; line-height: 1.8; color: var(--text); }
.article-content p { margin: 0 0 24px; }
.article-content h2 { font-size: 28px; font-weight: 700; line-height: 1.4; margin: 40px 0 16px; color: var(--text); padding-left: 16px; border-left: 4px solid var(--primary); }
.article-content h3 { font-size: 20px; font-weight: 700; line-height: 1.4; margin: 32px 0 12px; color: var(--text); }
.article-content img { border-radius: var(--radius-card); margin: 24px 0; box-shadow: var(--shadow-sm); }
.article-content blockquote { border-left: 4px solid var(--primary); background: var(--bg-soft); padding: 18px 22px; margin: 0 0 24px; border-radius: 0 var(--radius-card) var(--radius-card) 0; color: var(--text-secondary); }
.article-content blockquote p { margin: 0; }
.article-content ul, .article-content ol { margin: 0 0 24px; padding-left: 22px; }
.article-content li { margin-bottom: 8px; }
.article-content a { color: var(--primary); text-decoration: underline; text-underline-offset: 3px; }
.article-content a:hover { color: var(--primary-dark); }
.article-content code { background: var(--bg-soft); color: var(--primary-dark); padding: 2px 6px; border-radius: 4px; font-size: 14px; }
.article-content pre { background: #1F2A2A; color: #E8F0F0; padding: 20px 24px; border-radius: var(--radius-card); overflow-x: auto; margin: 0 0 24px; font-size: 14px; line-height: 1.7; }
.article-content pre code { background: transparent; color: inherit; padding: 0; }
.article-content table { width: 100%; border-collapse: collapse; margin: 0 0 24px; font-size: 14px; }
.article-content th, .article-content td { border: 1px solid var(--border); padding: 10px 14px; text-align: left; }
.article-content th { background: var(--bg-soft); font-weight: 600; }

/* Tags */
.article-tags { display: flex; flex-wrap: wrap; gap: 10px; padding-top: 24px; margin-top: 8px; border-top: 1px solid var(--border); }
.tag-pill { display: inline-flex; align-items: center; height: 28px; padding: 0 14px; border-radius: 999px; background: var(--bg-soft); color: var(--text-secondary); font-size: 12px; font-weight: 600; }
.tag-pill:hover { background: var(--primary); color: #fff; }

/* Not Found */
.not-found-box { background: var(--white); border: 1px solid var(--border); border-radius: var(--radius-card); box-shadow: var(--shadow-sm); text-align: center; padding: 80px 40px; margin: 32px 0 48px; }
.not-found-icon { width: 72px; height: 72px; margin: 0 auto 24px; border-radius: 20px; background: var(--bg-soft); display: flex; align-items: center; justify-content: center; font-size: 24px; font-weight: 800; color: var(--primary); }
.not-found-box h1 { font-size: 28px; font-weight: 800; margin-bottom: 12px; }
.not-found-box p { color: var(--text-secondary); margin-bottom: 28px; }

/* Related */
.related-section { background: var(--bg-soft); padding: 56px 0; }
.section-head { margin-bottom: 32px; text-align: center; }
.section-tag { display: inline-block; height: 26px; line-height: 26px; padding: 0 14px; border-radius: 999px; background: #E0F5F3; color: var(--primary-dark); font-size: 12px; font-weight: 600; margin-bottom: 10px; }
.section-head h2 { font-size: 28px; font-weight: 800; color: var(--text); }
.related-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; margin-bottom: 32px; }
.related-card { background: var(--white); border: 1px solid var(--border); border-radius: var(--radius-card); overflow: hidden; box-shadow: var(--shadow-sm); display: flex; flex-direction: column; transition: all .25s ease; }
.related-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-hover); border-color: rgba(14,159,142,.5); }
.related-thumb { aspect-ratio: 16/9; overflow: hidden; }
.related-thumb img { width: 100%; height: 100%; object-fit: cover; transition: transform .5s ease; }
.related-card:hover .related-thumb img { transform: scale(1.04); }
.related-body { padding: 20px 22px 22px; display: flex; flex-direction: column; flex: 1; }
.related-body .badge { align-self: flex-start; margin-bottom: 10px; }
.related-body h3 { font-size: 16px; font-weight: 700; line-height: 1.5; color: var(--text); margin-bottom: 8px; transition: color .25s ease; }
.related-card:hover .related-body h3 { color: var(--primary); }
.related-body p { font-size: 13px; color: var(--text-secondary); line-height: 1.6; margin-bottom: 16px; flex: 1; }
.related-link { font-size: 13px; font-weight: 600; color: var(--primary); display: inline-flex; align-items: center; gap: 4px; }
.related-link::after { content: "→"; transition: transform .25s ease; }
.related-card:hover .related-link::after { transform: translateX(4px); }
.related-footer { text-align: center; }

/* CTA */
.section-cta { background: linear-gradient(135deg, #1F2A2A 0%, #0B7C70 100%); padding: 64px 0; color: #fff; }
.cta-inner { display: flex; align-items: center; justify-content: space-between; gap: 40px; flex-wrap: wrap; }
.cta-inner h2 { font-size: 28px; font-weight: 800; margin-bottom: 8px; }
.cta-inner p { color: rgba(255,255,255,.75); max-width: 560px; }
.cta-buttons { display: flex; gap: 14px; flex-wrap: wrap; }

/* Footer */
.site-footer { background: #1F2A2A; color: #C4D0D0; padding: 56px 0 32px; }
.footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr; gap: 40px; margin-bottom: 40px; }
.footer-logo { display: flex; align-items: center; gap: 10px; font-size: 19px; font-weight: 800; color: #fff; margin-bottom: 16px; }
.footer-logo .brand-icon { background: var(--accent); }
.footer-brand p { font-size: 14px; color: #8A9A99; line-height: 1.7; max-width: 340px; }
.footer-links h4 { font-size: 15px; font-weight: 700; color: #fff; margin-bottom: 16px; }
.footer-links a, .footer-links span { display: block; font-size: 14px; color: #8A9A99; margin-bottom: 10px; transition: color .25s ease; }
.footer-links a:hover { color: var(--accent); }
.footer-bottom { border-top: 1px solid rgba(255,255,255,.08); padding-top: 24px; text-align: center; }
.footer-bottom p { font-size: 13px; color: #8A9A99; }

/* Focus Visible */
a:focus-visible, button:focus-visible, input:focus-visible { outline: 3px solid rgba(245,166,35,.35); outline-offset: 2px; }

/* Responsive */
@media (max-width: 1024px) {
  .related-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 768px) {
  .container { padding-left: 16px; padding-right: 16px; }
  .header-inner { gap: 12px; }
  .main-nav { position: fixed; top: 64px; left: 0; right: 0; background: var(--white); flex-direction: column; align-items: stretch; padding: 16px; gap: 4px; border-bottom: 1px solid var(--border); box-shadow: var(--shadow-hover); transform: translateY(-120%); transition: transform .3s ease; max-height: calc(100vh - 64px); overflow-y: auto; }
  .main-nav.open { transform: translateY(0); }
  .nav-link { height: 44px; border-radius: 8px; padding: 0 16px; }
  .search-box { display: none; }
  .btn-ghost { display: none; }
  .btn-accent { height: 40px; padding: 0 18px; font-size: 13px; }
  .nav-toggle { display: flex; }
  .article-section { padding: 32px 0 8px; }
  .article-card { padding: 28px 20px; }
  .article-title { font-size: 24px; }
  .article-content h2 { font-size: 22px; }
  .article-content h3 { font-size: 18px; }
  .related-grid { grid-template-columns: 1fr; gap: 16px; }
  .cta-inner { flex-direction: column; align-items: flex-start; }
  .cta-buttons { width: 100%; flex-direction: column; }
  .cta-buttons .btn { width: 100%; }
  .footer-grid { grid-template-columns: 1fr; gap: 32px; }
  .page-hero { padding: 32px 0 28px; }
  .not-found-box { padding: 56px 24px; }
}

@media (max-width: 520px) {
  .btn-accent { padding: 0 16px; }
  .brand-text { font-size: 17px; }
  .article-card { padding: 24px 16px; }
  .breadcrumb-current { max-width: 180px; }
  .breadcrumb a, .breadcrumb span { font-size: 12px; }
}