/* roulang page: index */
:root {
  --color-bg: #F5F9FC;
  --color-surface: #FFFFFF;
  --color-primary: #1A6E8A;
  --color-primary-dark: #0F3B57;
  --color-primary-soft: #E1EEF5;
  --color-accent: #C9A227;
  --color-text: #1E2A33;
  --color-text-sub: #5A6E7C;
  --color-line: #DDE7F0;
  --radius-card: 16px;
  --radius-btn: 10px;
  --shadow-card: 0 4px 16px rgba(15,60,85,0.06);
  --shadow-hover: 0 12px 32px rgba(15,60,85,0.12);
  --shadow-nav: 0 4px 20px rgba(15,60,85,0.08);
  --shadow-btn: 0 6px 16px rgba(26,110,138,0.25);
  --font: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  --transition: 200ms cubic-bezier(0.25, 0.1, 0.25, 1);
  --container: 1200px;
  --space-section: 96px;
  --space-section-md: 72px;
  --space-section-sm: 56px;
}

*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  font-family: var(--font);
  background: var(--color-bg);
  color: var(--color-text);
  line-height: 1.8;
  font-size: 16px;
  overflow-x: hidden;
}
img { max-width: 100%; display: block; }
a { color: var(--color-primary); text-decoration: none; transition: color var(--transition); }
ul, ol { list-style: none; }
button, input { font-family: inherit; font-size: inherit; }
button { cursor: pointer; border: none; background: none; color: inherit; }
:focus-visible { outline: 2px solid var(--color-accent); outline-offset: 2px; }
::selection { background: var(--color-primary-soft); }

.container { max-width: var(--container); margin: 0 auto; padding: 0 24px; }
.section { padding: var(--space-section) 0; }
.section-heading { margin-bottom: 40px; }
.section-heading h2 {
  font-size: 34px;
  font-weight: 700;
  color: var(--color-text);
  letter-spacing: -0.01em;
  line-height: 1.3;
  position: relative;
  padding-bottom: 16px;
}
.section-heading h2::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 48px;
  height: 3px;
  background: var(--color-accent);
  border-radius: 2px;
}
.section-heading .heading-sub { margin-top: 12px; color: var(--color-text-sub); font-size: 15px; max-width: 640px; }
.section-heading-row {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 24px;
  flex-wrap: wrap;
}
.text-link { font-size: 15px; font-weight: 500; color: var(--color-primary); display: inline-flex; align-items: center; gap: 6px; }
.text-link:hover { text-decoration: underline; }

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 14px 32px;
  border-radius: var(--radius-btn);
  font-weight: 600;
  font-size: 15px;
  line-height: 1.4;
  border: 1px solid transparent;
  transition: background var(--transition), transform var(--transition), box-shadow var(--transition), color var(--transition), border-color var(--transition);
  text-align: center;
  white-space: nowrap;
}
.btn:hover { text-decoration: none; }
.btn-primary { background: var(--color-primary); color: #fff; box-shadow: 0 4px 14px rgba(26,110,138,0.18); }
.btn-primary:hover { background: #155973; transform: translateY(-2px); box-shadow: var(--shadow-btn); }
.btn-primary:active { transform: translateY(0); box-shadow: none; }
.btn-secondary { background: #fff; color: var(--color-primary); border-color: var(--color-primary); }
.btn-secondary:hover { background: var(--color-primary-soft); border-color: var(--color-primary); }
.btn-light { background: #fff; color: var(--color-primary-dark); }
.btn-light:hover { background: #f0f5f8; transform: translateY(-2px); box-shadow: 0 8px 20px rgba(0,0,0,0.12); }
.btn-sm { padding: 10px 20px; font-size: 14px; border-radius: 8px; }

.badge {
  display: inline-flex;
  align-items: center;
  padding: 4px 12px;
  border-radius: 999px;
  background: var(--color-primary-soft);
  color: var(--color-primary);
  font-size: 12px;
  font-weight: 500;
  line-height: 1.5;
  letter-spacing: 0.02em;
}

/* ========== Header & Nav ========== */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  height: 72px;
  display: flex;
  align-items: center;
  background: rgba(255,255,255,0.65);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  border-bottom: 1px solid rgba(255,255,255,0.3);
  transition: background 400ms cubic-bezier(0.25,0.1,0.25,1), box-shadow 400ms cubic-bezier(0.25,0.1,0.25,1);
}
.site-header.scrolled {
  background: rgba(255,255,255,0.92);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  box-shadow: var(--shadow-nav);
  border-bottom-color: transparent;
}
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  gap: 24px;
}
.logo {
  font-size: 22px;
  font-weight: 700;
  color: var(--color-primary-dark);
  letter-spacing: -0.01em;
  line-height: 1.2;
  flex-shrink: 0;
}
.logo:hover { color: var(--color-primary); }
.logo .logo-accent { color: var(--color-primary); }

.main-nav { display: flex; align-items: center; gap: 8px; flex: 1; justify-content: center; }
.main-nav a {
  font-size: 15px;
  font-weight: 500;
  color: var(--color-text);
  padding: 10px 14px;
  border-radius: 8px;
  position: relative;
  transition: color var(--transition), background var(--transition);
}
.main-nav a:hover { color: var(--color-primary); background: var(--color-primary-soft); }
.main-nav a.active { color: var(--color-primary); font-weight: 600; }
.main-nav a.active::after {
  content: "";
  position: absolute;
  left: 14px;
  right: 14px;
  bottom: 4px;
  height: 2px;
  background: var(--color-primary);
  border-radius: 2px;
}

.header-actions { display: flex; align-items: center; gap: 12px; flex-shrink: 0; }
.header-search { position: relative; display: flex; align-items: center; }
.search-toggle {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: 50%;
  color: var(--color-text);
  transition: background var(--transition), color var(--transition);
}
.search-toggle:hover { background: var(--color-primary-soft); color: var(--color-primary); }
.search-toggle svg { width: 18px; height: 18px; }
.search-drop {
  position: absolute;
  right: 0;
  top: calc(100% + 12px);
  width: 260px;
  background: var(--color-surface);
  border: 1px solid var(--color-line);
  border-radius: 999px;
  box-shadow: var(--shadow-card);
  padding: 6px 8px 6px 20px;
  display: none;
  align-items: center;
  gap: 8px;
  opacity: 0;
  transform: translateY(-8px);
  transition: opacity 200ms, transform 200ms;
}
.search-drop.open { display: flex; opacity: 1; transform: translateY(0); }
.search-drop input {
  flex: 1;
  border: none;
  outline: none;
  font-size: 14px;
  background: transparent;
  color: var(--color-text);
  min-width: 0;
}
.search-drop input::placeholder { color: var(--color-text-sub); }
.search-drop button {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background: var(--color-primary-soft);
  color: var(--color-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}
.search-drop button svg { width: 16px; height: 16px; }

.nav-toggle {
  display: none;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: 10px;
  color: var(--color-text);
}
.nav-toggle svg { width: 22px; height: 22px; }
.nav-toggle:hover { background: var(--color-primary-soft); color: var(--color-primary); }

/* ========== Hero ========== */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  position: relative;
  padding: 140px 0 80px;
  background:
    linear-gradient(120deg, rgba(15,55,90,0.35) 0%, rgba(15,55,90,0.55) 100%),
    url('/assets/images/backpic/back-1.webp') center / cover no-repeat;
  color: #fff;
}
.hero-content { position: relative; z-index: 2; max-width: 760px; }
.hero h1 {
  font-size: 58px;
  font-weight: 700;
  line-height: 1.2;
  letter-spacing: -0.01em;
  color: #fff;
  margin-bottom: 24px;
}
.hero h1 .line { display: block; }
.hero-sub {
  font-size: 17px;
  line-height: 1.8;
  color: rgba(255,255,255,0.9);
  max-width: 560px;
  margin-bottom: 40px;
}
.hero-actions { display: flex; gap: 16px; flex-wrap: wrap; }
.hero-actions .btn-secondary { background: rgba(255,255,255,0.12); color: #fff; border-color: rgba(255,255,255,0.5); backdrop-filter: blur(4px); }
.hero-actions .btn-secondary:hover { background: rgba(255,255,255,0.25); border-color: #fff; }
.hero-scroll {
  position: absolute;
  bottom: 32px;
  left: 50%;
  transform: translateX(-50%);
  width: 44px;
  height: 44px;
  border-radius: 50%;
  border: 2px solid rgba(255,255,255,0.6);
  display: flex;
  align-items: center;
  justify-content: center;
  color: rgba(255,255,255,0.8);
  transition: border-color var(--transition), color var(--transition), transform var(--transition);
  z-index: 2;
}
.hero-scroll:hover { border-color: #fff; color: #fff; transform: translateX(-50%) translateY(4px); }
.hero-scroll svg { width: 18px; height: 18px; }

/* ========== About ========== */
.about-section { padding: var(--space-section) 0; }
.about-grid {
  display: grid;
  grid-template-columns: 58% 42%;
  gap: 64px;
  align-items: center;
}
.about-text h2 {
  font-size: 34px;
  font-weight: 700;
  color: var(--color-text);
  letter-spacing: -0.01em;
  line-height: 1.3;
  margin-bottom: 16px;
  position: relative;
  padding-bottom: 16px;
}
.about-text h2::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 48px;
  height: 3px;
  background: var(--color-accent);
  border-radius: 2px;
}
.about-text p { margin-top: 16px; color: var(--color-text-sub); font-size: 15px; line-height: 1.8; }
.about-text p strong { color: var(--color-text); font-weight: 600; }
.about-image {
  border-radius: var(--radius-card);
  overflow: hidden;
  box-shadow: var(--shadow-card);
  background: var(--color-primary-soft);
  aspect-ratio: 4/3;
}
.about-image img { width: 100%; height: 100%; object-fit: cover; }

/* ========== Featured ========== */
.featured-section { padding: var(--space-section) 0; background: var(--color-surface); }
.featured-grid {
  display: grid;
  grid-template-columns: 1fr 1fr 0.85fr;
  gap: 24px;
  align-items: stretch;
}
.featured-card {
  background: var(--color-surface);
  border-radius: var(--radius-card);
  box-shadow: var(--shadow-card);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  transition: transform var(--transition), box-shadow var(--transition);
  border: 1px solid rgba(221, 231, 240, 0.4);
}
.featured-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-hover); }
.card-img {
  position: relative;
  overflow: hidden;
  aspect-ratio: 3/2;
  background: var(--color-primary-soft);
}
.card-img img { width: 100%; height: 100%; object-fit: cover; transition: transform 400ms cubic-bezier(0.25,0.1,0.25,1); }
.featured-card:hover .card-img img { transform: scale(1.03); }
.card-badge {
  position: absolute;
  top: 16px;
  left: 16px;
  z-index: 2;
  box-shadow: 0 2px 8px rgba(15,60,85,0.12);
}
.featured-card.tall { flex-direction: column; }
.featured-card.tall .card-img { aspect-ratio: 4/4.4; flex: 1; }
.card-body { padding: 20px 24px 24px; display: flex; flex-direction: column; flex: 1; }
.card-body h3 { font-size: 19px; font-weight: 600; color: var(--color-text); line-height: 1.4; margin-bottom: 8px; }
.card-body p { font-size: 14px; color: var(--color-text-sub); line-height: 1.75; flex: 1; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
.card-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-top: 16px;
  font-size: 13px;
  color: var(--color-text-sub);
}
.card-link { color: var(--color-primary); font-weight: 500; display: inline-flex; align-items: center; gap: 4px; }
.card-link:hover { text-decoration: underline; }
.card-link .arrow { transition: transform var(--transition); display: inline-block; }
.card-link:hover .arrow { transform: translateX(4px); }

/* ========== News ========== */
.news-section { padding: var(--space-section) 0; }
.news-list { background: var(--color-surface); border-radius: var(--radius-card); box-shadow: var(--shadow-card); padding: 4px 24px; }
.news-row { border-bottom: 1px solid var(--color-line); }
.news-row:last-child { border-bottom: none; }
.news-row-link {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 20px 8px;
  border-radius: 8px;
  transition: background var(--transition);
}
.news-row-link:hover { background: var(--color-bg); }
.news-row-body { flex: 1; min-width: 0; }
.news-row-body h3 {
  font-size: 18px;
  font-weight: 600;
  color: var(--color-text);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  transition: color var(--transition);
}
.news-row-link:hover .news-row-body h3 { color: var(--color-primary); }
.news-row-body p {
  font-size: 14px;
  color: var(--color-text-sub);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  margin-top: 2px;
}
.news-row-meta { display: flex; align-items: center; gap: 16px; flex-shrink: 0; }
.news-row-meta time { font-size: 13px; color: var(--color-text-sub); }
.news-arrow {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background: var(--color-primary-soft);
  color: var(--color-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 16px;
  flex-shrink: 0;
  transition: background var(--transition), transform var(--transition), color var(--transition);
}
.news-row-link:hover .news-arrow { background: var(--color-primary); color: #fff; transform: translateX(4px); }

.news-empty {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 64px 24px;
  gap: 8px;
  background: var(--color-primary-soft);
  border-radius: 12px;
  text-align: center;
}
.news-empty .empty-icon {
  width: 56px;
  height: 56px;
  border-radius: 50%;
  background: var(--color-surface);
  color: var(--color-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 24px;
  margin-bottom: 8px;
}
.news-empty p { font-size: 16px; font-weight: 600; color: var(--color-text); }
.news-empty span { font-size: 14px; color: var(--color-text-sub); }

/* ========== Stats ========== */
.stats-section {
  padding: 72px 0;
  background: var(--color-primary-soft);
  position: relative;
  overflow: hidden;
}
.stats-section::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(45deg, rgba(15,60,85,0.05) 25%, transparent 25%, transparent 75%, rgba(15,60,85,0.05) 75%),
    linear-gradient(45deg, rgba(15,60,85,0.05) 25%, transparent 25%, transparent 75%, rgba(15,60,85,0.05) 75%);
  background-size: 24px 24px;
  background-position: 0 0, 12px 12px;
  opacity: 0.8;
  pointer-events: none;
}
.stats-grid {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  text-align: center;
}
.stats-item { position: relative; padding: 16px 8px; }
.stats-item + .stats-item::before {
  content: "";
  position: absolute;
  left: -12px;
  top: 20%;
  bottom: 20%;
  width: 1px;
  background: rgba(15,60,85,0.12);
}
.stats-number {
  font-size: 44px;
  font-weight: 700;
  color: var(--color-primary-dark);
  line-height: 1.2;
  letter-spacing: -0.01em;
}
.stats-number .unit { font-size: 22px; font-weight: 600; margin-left: 2px; }
.stats-label { font-size: 14px; color: var(--color-text-sub); margin-top: 8px; }

/* ========== FAQ ========== */
.faq-section { padding: var(--space-section) 0; }
.faq-list { max-width: 860px; display: flex; flex-direction: column; gap: 16px; }
.faq-item {
  background: var(--color-surface);
  border-radius: var(--radius-card);
  box-shadow: 0 2px 8px rgba(15,60,85,0.04);
  border: 1px solid rgba(221,231,240,0.6);
  overflow: hidden;
  transition: box-shadow var(--transition);
}
.faq-item.open { box-shadow: var(--shadow-card); }
.faq-question {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  text-align: left;
  padding: 20px 24px;
  font-size: 16px;
  font-weight: 600;
  color: var(--color-text);
  background: none;
  border: none;
  cursor: pointer;
  transition: color var(--transition);
}
.faq-question:hover { color: var(--color-primary); }
.faq-icon {
  width: 26px;
  height: 26px;
  border-radius: 50%;
  background: var(--color-primary-soft);
  color: var(--color-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
  font-weight: 500;
  flex-shrink: 0;
  transition: transform 200ms, background var(--transition), color var(--transition);
  line-height: 1;
}
.faq-item.open .faq-icon { transform: rotate(45deg); background: var(--color-primary); color: #fff; }
.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 300ms cubic-bezier(0.25,0.1,0.25,1);
}
.faq-answer-inner { padding: 0 24px 20px; font-size: 14px; color: var(--color-text-sub); line-height: 1.8; }
.faq-item.open .faq-answer { max-height: 300px; }

/* ========== Subscribe ========== */
.subscribe-section {
  padding: 96px 0;
  background: var(--color-primary-dark);
  color: #fff;
  text-align: center;
  position: relative;
  overflow: hidden;
}
.subscribe-section::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(45deg, rgba(255,255,255,0.02) 25%, transparent 25%, transparent 75%, rgba(255,255,255,0.02) 75%),
    linear-gradient(45deg, rgba(255,255,255,0.02) 25%, transparent 25%, transparent 75%, rgba(255,255,255,0.02) 75%);
  background-size: 24px 24px;
  background-position: 0 0, 12px 12px;
  pointer-events: none;
}
.subscribe-inner { position: relative; z-index: 1; max-width: 640px; margin: 0 auto; }
.subscribe-inner h2 { font-size: 32px; font-weight: 700; color: #fff; line-height: 1.3; margin-bottom: 12px; }
.subscribe-inner .subscribe-sub { font-size: 15px; color: rgba(255,255,255,0.75); }
.subscribe-form {
  display: flex;
  gap: 12px;
  max-width: 520px;
  margin: 32px auto 0;
  text-align: left;
}
.subscribe-form input {
  flex: 1;
  padding: 14px 20px;
  border-radius: var(--radius-btn);
  border: 1px solid rgba(255,255,255,0.35);
  background: rgba(255,255,255,0.9);
  font-size: 15px;
  color: var(--color-text);
  outline: none;
  transition: border-color var(--transition), box-shadow var(--transition);
}
.subscribe-form input::placeholder { color: var(--color-text-sub); }
.subscribe-form input:focus { border-color: #fff; box-shadow: 0 0 0 3px rgba(255,255,255,0.2); }
.subscribe-form input.error { border-color: #D9534F; box-shadow: 0 0 0 3px rgba(217,83,79,0.2); }
.form-feedback { margin-top: 12px; font-size: 14px; line-height: 1.6; }
.form-feedback.success { color: #7dd87d; display: flex; align-items: center; justify-content: center; gap: 8px; }
.form-feedback.error { color: #f0a9a6; }
.form-feedback.success .check {
  width: 20px;
  height: 20px;
  border-radius: 50%;
  background: #2e8b57;
  color: #fff;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 13px;
  font-weight: 700;
}

/* ========== Footer ========== */
.site-footer {
  background: var(--color-primary-dark);
  color: rgba(255,255,255,0.7);
  padding: 64px 0 28px;
  position: relative;
  overflow: hidden;
}
.site-footer::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(45deg, rgba(255,255,255,0.02) 25%, transparent 25%, transparent 75%, rgba(255,255,255,0.02) 75%),
    linear-gradient(45deg, rgba(255,255,255,0.02) 25%, transparent 25%, transparent 75%, rgba(255,255,255,0.02) 75%);
  background-size: 24px 24px;
  background-position: 0 0, 12px 12px;
  pointer-events: none;
}
.footer-grid {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 48px;
  margin-bottom: 48px;
}
.footer-brand .logo { color: #fff; font-size: 20px; }
.footer-brand .logo:hover { color: #fff; }
.footer-brand p { font-size: 14px; line-height: 1.8; margin: 16px 0 20px; max-width: 320px; }
.footer-socials { display: flex; gap: 12px; }
.footer-socials a {
  width: 38px;
  height: 38px;
  border-radius: 50%;
  border: 1px solid rgba(255,255,255,0.3);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 13px;
  color: rgba(255,255,255,0.7);
  transition: background var(--transition), border-color var(--transition), color var(--transition);
}
.footer-socials a:hover { background: var(--color-primary); border-color: var(--color-primary); color: #fff; }
.footer-col h4 { font-size: 14px; font-weight: 600; color: #fff; margin-bottom: 16px; }
.footer-col a {
  display: block;
  padding: 4px 0;
  font-size: 13px;
  color: rgba(255,255,255,0.55);
  transition: color var(--transition);
}
.footer-col a:hover { color: #fff; }
.footer-bottom {
  position: relative;
  z-index: 1;
  border-top: 1px solid rgba(255,255,255,0.08);
  padding-top: 24px;
  text-align: center;
  font-size: 13px;
  color: rgba(255,255,255,0.4);
}

/* ========== Mobile Nav Drawer ========== */
@media (max-width: 767px) {
  .main-nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: #F5F9FC;
    flex-direction: column;
    justify-content: center;
    gap: 8px;
    padding: 80px 32px 40px;
    z-index: 998;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-12px);
    transition: opacity 300ms cubic-bezier(0.25,0.1,0.25,1), transform 300ms cubic-bezier(0.25,0.1,0.25,1), visibility 300ms;
  }
  .main-nav.open { opacity: 1; visibility: visible; transform: translateY(0); }
  .main-nav a {
    font-size: 22px;
    line-height: 48px;
    padding: 4px 12px;
    border-bottom: 1px solid var(--color-line);
    border-radius: 0;
    color: var(--color-text);
  }
  .main-nav a.active { color: var(--color-primary); }
  .main-nav a.active::after { display: none; }
  .nav-toggle { display: flex; }
  body.no-scroll { overflow: hidden; }
  .header-cta-mobile { display: block; }
}

@media (max-width: 1023px) and (min-width: 768px) {
  .main-nav a { padding: 10px 10px; font-size: 14px; }
}

/* ========== Responsive ========== */
@media (max-width: 1023px) {
  :root { --space-section: 72px; }
  .hero h1 { font-size: 44px; }
  .featured-grid { grid-template-columns: 1fr 1fr; }
  .featured-card.tall { grid-column: span 2; }
  .featured-card.tall .card-img { aspect-ratio: 16/9; flex: none; }
  .footer-grid { grid-template-columns: 1fr 1fr; gap: 40px; }
  .stats-grid { grid-template-columns: repeat(2, 1fr); gap: 40px 24px; }
  .stats-item + .stats-item::before { display: none; }
}

@media (max-width: 767px) {
  :root { --space-section: 56px; }
  .container { padding: 0 16px; }
  .site-header { height: 60px; }
  .header-inner { gap: 12px; }
  .logo { font-size: 19px; }
  .header-actions .btn { display: none; }
  .header-search { display: none; }

  .hero { padding: 100px 0 60px; }
  .hero h1 { font-size: 34px; }
  .hero-sub { font-size: 15px; }
  .hero-actions { flex-direction: column; align-items: stretch; }
  .hero-actions .btn { width: 100%; }

  .about-grid { grid-template-columns: 1fr; gap: 32px; }
  .about-text h2 { font-size: 28px; }
  .about-image { aspect-ratio: 4/3; }

  .section-heading h2 { font-size: 28px; }
  .featured-grid { grid-template-columns: 1fr; }
  .featured-card.tall { grid-column: span 1; }
  .featured-card.tall .card-img { aspect-ratio: 3/2; flex: none; }

  .news-list { padding: 4px 16px; }
  .news-row-link { flex-direction: column; align-items: flex-start; gap: 10px; padding: 16px 8px; }
  .news-row-meta { width: 100%; justify-content: space-between; }
  .news-row-meta time { order: 2; }
  .news-row-meta .badge { order: 1; }
  .news-arrow { display: none; }

  .stats-grid { grid-template-columns: repeat(2, 1fr); gap: 24px; }
  .stats-number { font-size: 32px; }

  .faq-question { font-size: 15px; padding: 16px 20px; }
  .faq-answer-inner { padding: 0 20px 16px; }

  .subscribe-section { padding: 64px 0; }
  .subscribe-inner h2 { font-size: 26px; }
  .subscribe-form { flex-direction: column; gap: 12px; }
  .subscribe-form .btn { width: 100%; }

  .footer-grid { grid-template-columns: 1fr; gap: 32px; }
  .footer-brand p { max-width: 100%; }
}

@media (max-width: 520px) {
  .about-grid { gap: 24px; }
  .about-text p { font-size: 14px; }
  .section-heading-row { flex-direction: column; align-items: flex-start; }
  .news-row-body h3 { font-size: 16px; }
  .news-row-body p { font-size: 13px; }
  .stats-item { padding: 8px; }
  .stats-label { font-size: 13px; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}

/* roulang page: category1 */
:root {
  --color-bg: #F5F9FC;
  --color-surface: #FFFFFF;
  --color-primary: #1A6E8A;
  --color-primary-dark: #0F3B57;
  --color-primary-soft: #E1EEF5;
  --color-accent: #C9A227;
  --color-text: #1E2A33;
  --color-text-sub: #5A6E7C;
  --color-line: #DDE7F0;
  --radius-card: 16px;
  --radius-btn: 10px;
  --radius-input: 10px;
  --shadow-card: 0 4px 16px rgba(15, 60, 85, 0.06);
  --shadow-hover: 0 12px 32px rgba(15, 60, 85, 0.12);
  --shadow-nav: 0 4px 20px rgba(15, 60, 85, 0.08);
  --font-stack: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  --ease: cubic-bezier(0.25, 0.1, 0.25, 1);
}
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}
html {
  scroll-behavior: smooth;
}
body {
  font-family: var(--font-stack);
  font-size: 16px;
  line-height: 1.8;
  color: var(--color-text);
  background: var(--color-bg);
  -webkit-font-smoothing: antialiased;
}
img {
  max-width: 100%;
  display: block;
}
a {
  color: inherit;
  text-decoration: none;
}
button {
  font-family: inherit;
  border: none;
  background: none;
  cursor: pointer;
  color: inherit;
}
input {
  font-family: inherit;
}
ul,
ol {
  list-style: none;
}
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}
.section-head {
  margin-bottom: 40px;
}
.section-tag {
  display: inline-block;
  font-size: 13px;
  font-weight: 500;
  color: var(--color-primary);
  background: var(--color-primary-soft);
  padding: 4px 14px;
  border-radius: 999px;
  letter-spacing: 0.02em;
  margin-bottom: 14px;
}
.section-head h2 {
  font-size: 34px;
  line-height: 1.3;
  letter-spacing: -0.01em;
  font-weight: 700;
  position: relative;
  padding-bottom: 14px;
}
.section-head h2::after {
  content: "";
  display: block;
  width: 48px;
  height: 4px;
  background: var(--color-accent);
  border-radius: 2px;
  position: absolute;
  left: 0;
  bottom: 0;
}
.section-desc {
  font-size: 15px;
  color: var(--color-text-sub);
  margin-top: 18px;
  max-width: 640px;
}
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-size: 15px;
  font-weight: 600;
  padding: 14px 32px;
  border-radius: var(--radius-btn);
  transition: all 0.2s var(--ease);
  line-height: 1.4;
}
.btn:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
}
.btn-primary {
  background: var(--color-primary);
  color: #fff;
}
.btn-primary:hover {
  background: #155973;
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(26, 110, 138, 0.22);
}
.btn-primary:active {
  transform: translateY(0);
  box-shadow: none;
}
.btn-outline {
  background: var(--color-surface);
  color: var(--color-primary);
  border: 1px solid var(--color-primary);
}
.btn-outline:hover {
  background: var(--color-primary-soft);
}
.btn-outline:active {
  background: var(--color-primary-soft);
}
.btn-sm {
  padding: 9px 20px;
  font-size: 14px;
}
.btn-lg {
  padding: 16px 40px;
  font-size: 16px;
}
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: rgba(255, 255, 255, 0.65);
  -webkit-backdrop-filter: blur(8px);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid rgba(255, 255, 255, 0.3);
  box-shadow: 0 2px 12px rgba(15, 60, 85, 0.06);
  transition: background 0.4s var(--ease), box-shadow 0.4s var(--ease);
}
.site-header.scrolled {
  background: rgba(255, 255, 255, 0.92);
  -webkit-backdrop-filter: blur(16px);
  backdrop-filter: blur(16px);
  box-shadow: var(--shadow-nav);
}
.header-inner {
  height: 72px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}
.logo {
  font-size: 24px;
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--color-primary-dark);
  white-space: nowrap;
}
.logo-accent {
  color: var(--color-primary);
}
.main-nav {
  display: flex;
  align-items: center;
  gap: 32px;
}
.main-nav a {
  font-size: 15px;
  font-weight: 500;
  color: var(--color-text);
  position: relative;
  padding: 6px 0;
  transition: color 0.2s var(--ease);
}
.main-nav a::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 2px;
  background: var(--color-primary);
  border-radius: 2px;
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.2s var(--ease);
}
.main-nav a:hover {
  color: var(--color-primary);
}
.main-nav a.active {
  color: var(--color-primary);
}
.main-nav a.active::after {
  transform: scaleX(1);
}
.header-actions {
  display: flex;
  align-items: center;
  gap: 14px;
}
.header-search {
  position: relative;
}
.search-toggle {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  color: var(--color-text);
  transition: background 0.2s var(--ease), color 0.2s var(--ease);
}
.search-toggle svg,
.search-drop svg {
  width: 18px;
  height: 18px;
}
.search-toggle:hover {
  background: var(--color-primary-soft);
  color: var(--color-primary);
}
.search-toggle:focus-visible,
.nav-toggle:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
}
.search-drop {
  position: absolute;
  right: 0;
  top: calc(100% + 12px);
  display: flex;
  align-items: center;
  background: var(--color-surface);
  border: 1px solid var(--color-line);
  border-radius: 999px;
  padding: 4px 4px 4px 16px;
  box-shadow: 0 8px 24px rgba(15, 60, 85, 0.1);
  opacity: 0;
  visibility: hidden;
  transform: translateY(-8px);
  transition: opacity 0.2s var(--ease), transform 0.2s var(--ease), visibility 0.2s;
  z-index: 99;
}
.search-drop.open {
  opacity: 1;
  visibility: visible;
  transform: none;
}
.search-drop input {
  border: none;
  outline: none;
  width: 220px;
  font-size: 14px;
  color: var(--color-text);
  background: transparent;
}
.search-drop input::placeholder {
  color: var(--color-text-sub);
}
.search-drop button {
  width: 34px;
  height: 34px;
  border-radius: 50%;
  background: var(--color-primary);
  color: #fff;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  transition: background 0.2s var(--ease);
}
.search-drop button:hover {
  background: #155973;
}
.nav-toggle {
  display: none;
  width: 40px;
  height: 40px;
  border-radius: 10px;
  align-items: center;
  justify-content: center;
  color: var(--color-text);
}
.nav-toggle svg {
  width: 22px;
  height: 22px;
}
.nav-toggle:hover {
  background: var(--color-primary-soft);
}
.mobile-menu {
  position: fixed;
  inset: 0;
  z-index: 990;
  background: rgba(255, 255, 255, 0.97);
  -webkit-backdrop-filter: blur(24px);
  backdrop-filter: blur(24px);
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: 32px 40px;
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.3s var(--ease), visibility 0.3s;
}
.mobile-menu.open {
  opacity: 1;
  visibility: visible;
}
.mobile-nav {
  display: flex;
  flex-direction: column;
}
.mobile-nav a {
  font-size: 22px;
  line-height: 56px;
  font-weight: 600;
  color: var(--color-text);
  border-bottom: 1px solid var(--color-line);
  transition: color 0.2s var(--ease);
}
.mobile-nav a:last-child {
  border-bottom: none;
}
.mobile-nav a:hover,
.mobile-nav a.active {
  color: var(--color-primary);
}
.page-hero {
  position: relative;
  min-height: 420px;
  display: flex;
  align-items: center;
  padding: 140px 0 90px;
  background:
    linear-gradient(rgba(245, 249, 252, 0.94), rgba(234, 242, 248, 0.97)),
    url('/assets/images/backpic/back-1.webp') center/cover no-repeat;
  background-color: #EAF2F8;
  border-bottom: 1px solid var(--color-line);
  overflow: hidden;
}
.hero-inner {
  max-width: 1200px;
}
.hero-subtop {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  font-weight: 500;
  color: var(--color-primary);
  background: rgba(255, 255, 255, 0.7);
  padding: 6px 16px;
  border-radius: 999px;
  border: 1px solid var(--color-line);
  margin-bottom: 24px;
  letter-spacing: 0.02em;
}
.page-hero h1 {
  font-size: 44px;
  line-height: 1.3;
  letter-spacing: -0.01em;
  font-weight: 700;
  color: var(--color-primary-dark);
  max-width: 760px;
  margin-bottom: 20px;
}
.hero-sub {
  font-size: 17px;
  line-height: 1.8;
  color: var(--color-text-sub);
  max-width: 620px;
  margin-bottom: 32px;
}
.hero-actions {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}
.content-grid-section {
  padding: 96px 0 72px;
}
.content-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  margin-top: 8px;
}
.content-card {
  background: var(--color-surface);
  border-radius: var(--radius-card);
  overflow: hidden;
  box-shadow: var(--shadow-card);
  transition: transform 0.2s var(--ease), box-shadow 0.2s var(--ease);
  display: flex;
  flex-direction: column;
}
.content-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-hover);
}
.content-card.card-wide {
  grid-column: 1 / -1;
  display: grid;
  grid-template-columns: 1.2fr 1fr;
}
.card-media {
  position: relative;
  aspect-ratio: 16 / 9;
  overflow: hidden;
  background: var(--color-primary-soft);
}
.card-media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.4s var(--ease);
}
.content-card:hover .card-media img {
  transform: scale(1.03);
}
.card-badge {
  position: absolute;
  top: 12px;
  left: 12px;
  background: rgba(15, 59, 87, 0.85);
  color: #fff;
  font-size: 12px;
  font-weight: 500;
  padding: 4px 12px;
  border-radius: 999px;
  letter-spacing: 0.02em;
  z-index: 2;
}
.card-body {
  padding: 20px 20px 24px;
  display: flex;
  flex-direction: column;
  flex: 1;
}
.card-wide .card-body {
  padding: 32px 32px 32px 0;
  justify-content: center;
}
.card-wide .card-media {
  height: 100%;
  min-height: 240px;
  aspect-ratio: auto;
  border-radius: 0;
}
.card-body h3 {
  font-size: 18px;
  line-height: 1.5;
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: 10px;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  transition: color 0.2s var(--ease);
}
.card-wide .card-body h3 {
  font-size: 22px;
}
.content-card:hover .card-body h3 {
  color: var(--color-primary);
}
.card-body p {
  font-size: 14px;
  line-height: 1.7;
  color: var(--color-text-sub);
  margin-bottom: 16px;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.card-meta {
  margin-top: auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 13px;
  color: var(--color-text-sub);
}
.card-link {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  color: var(--color-primary);
  font-weight: 500;
  font-size: 14px;
}
.card-link:hover {
  text-decoration: underline;
}
.card-link svg {
  width: 14px;
  height: 14px;
  transition: transform 0.2s var(--ease);
}
.card-link:hover svg {
  transform: translateX(3px);
}
.pagination {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 8px;
  margin-top: 48px;
  flex-wrap: wrap;
}
.page-link {
  min-width: 42px;
  height: 42px;
  padding: 0 14px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 999px;
  border: 1px solid var(--color-line);
  background: var(--color-surface);
  font-size: 14px;
  font-weight: 500;
  color: var(--color-text-sub);
  transition: all 0.2s var(--ease);
}
.page-link:hover {
  border-color: var(--color-primary);
  color: var(--color-primary);
}
.page-link.active {
  background: var(--color-primary);
  border-color: var(--color-primary);
  color: #fff;
}
.page-link.next {
  padding: 0 20px;
}
.seo-block {
  margin-top: 40px;
  background: var(--color-primary-soft);
  border-radius: var(--radius-card);
  padding: 28px 32px;
  border: 1px solid var(--color-line);
}
.seo-block p {
  font-size: 14px;
  line-height: 1.9;
  color: var(--color-text-sub);
}
.guide-section {
  padding: 96px 0;
  background: var(--color-surface);
  border-top: 1px solid var(--color-line);
  border-bottom: 1px solid var(--color-line);
}
.guide-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items: center;
}
.guide-media {
  border-radius: var(--radius-card);
  overflow: hidden;
  box-shadow: var(--shadow-card);
  aspect-ratio: 4 / 3;
  background: var(--color-primary-soft);
}
.guide-media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.guide-content .section-tag {
  margin-bottom: 16px;
}
.guide-content h2 {
  font-size: 32px;
  line-height: 1.3;
  letter-spacing: -0.01em;
  font-weight: 700;
  color: var(--color-primary-dark);
  margin-bottom: 20px;
  position: relative;
  padding-bottom: 14px;
}
.guide-content h2::after {
  content: "";
  display: block;
  width: 48px;
  height: 4px;
  background: var(--color-accent);
  border-radius: 2px;
  position: absolute;
  left: 0;
  bottom: 0;
}
.guide-content p {
  font-size: 15px;
  line-height: 1.9;
  color: var(--color-text-sub);
  margin-bottom: 20px;
}
.guide-content ul {
  margin-bottom: 28px;
}
.guide-content ul li {
  position: relative;
  padding-left: 24px;
  font-size: 15px;
  line-height: 2;
  color: var(--color-text);
}
.guide-content ul li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 13px;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--color-primary);
}
.stats-section {
  padding: 80px 0;
  background: var(--color-bg);
  border-bottom: 1px solid var(--color-line);
  position: relative;
  overflow: hidden;
}
.stats-section::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image: radial-gradient(rgba(15, 59, 87, 0.04) 1px, transparent 1px);
  background-size: 24px 24px;
  pointer-events: none;
}
.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 32px;
  text-align: center;
  position: relative;
  z-index: 1;
}
.stat-item {
  padding: 16px;
  border-left: 1px solid var(--color-line);
}
.stat-item:first-child {
  border-left: none;
}
.stat-num {
  display: block;
  font-size: 46px;
  font-weight: 700;
  line-height: 1.2;
  color: var(--color-primary-dark);
  letter-spacing: -0.01em;
  margin-bottom: 6px;
}
.stat-label {
  font-size: 14px;
  color: var(--color-text-sub);
}
.faq-section {
  padding: 96px 0;
}
.faq-list {
  max-width: 860px;
  margin: 0 auto;
  background: var(--color-surface);
  border-radius: var(--radius-card);
  box-shadow: var(--shadow-card);
  overflow: hidden;
}
.faq-item {
  border-bottom: 1px solid #EDF3F8;
}
.faq-item:last-child {
  border-bottom: none;
}
.faq-question {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 0 28px;
  min-height: 64px;
  font-size: 16px;
  font-weight: 600;
  color: var(--color-text);
  text-align: left;
  transition: color 0.2s var(--ease), background 0.2s var(--ease);
}
.faq-question:hover {
  color: var(--color-primary);
}
.faq-question .icon {
  flex-shrink: 0;
  width: 28px;
  height: 28px;
  border-radius: 50%;
  border: 1px solid var(--color-line);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
  color: var(--color-primary);
  transition: transform 0.3s var(--ease), background 0.3s var(--ease), color 0.3s var(--ease);
}
.faq-item.open .faq-question .icon {
  transform: rotate(45deg);
  background: var(--color-primary);
  color: #fff;
  border-color: var(--color-primary);
}
.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.4s var(--ease);
}
.faq-answer p {
  padding: 0 28px 24px;
  font-size: 14px;
  line-height: 1.9;
  color: var(--color-text-sub);
}
.faq-item.open .faq-answer {
  max-height: 240px;
}
.cta-band {
  padding: 80px 0;
  background: var(--color-primary-soft);
  border-top: 1px solid var(--color-line);
  text-align: center;
}
.cta-inner {
  max-width: 720px;
}
.cta-band h2 {
  font-size: 34px;
  line-height: 1.3;
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--color-primary-dark);
  margin-bottom: 12px;
}
.cta-band p {
  font-size: 16px;
  color: var(--color-text-sub);
  margin-bottom: 32px;
}
.site-footer {
  background: var(--color-primary-dark);
  color: rgba(255, 255, 255, 0.78);
  padding: 72px 0 0;
  position: relative;
  overflow: hidden;
}
.site-footer::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image: radial-gradient(rgba(255, 255, 255, 0.06) 1px, transparent 1px);
  background-size: 32px 32px;
  pointer-events: none;
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.6fr 1fr 1fr 1fr;
  gap: 48px;
  padding-bottom: 48px;
  position: relative;
  z-index: 1;
}
.footer-brand .logo {
  color: #fff;
  font-size: 26px;
  margin-bottom: 14px;
  display: block;
}
.footer-brand p {
  font-size: 14px;
  line-height: 1.8;
  color: rgba(255, 255, 255, 0.65);
  max-width: 320px;
  margin-bottom: 20px;
}
.footer-socials {
  display: flex;
  gap: 10px;
}
.footer-socials a {
  width: 38px;
  height: 38px;
  border-radius: 50%;
  border: 1px solid rgba(255, 255, 255, 0.3);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 14px;
  color: rgba(255, 255, 255, 0.8);
  transition: background 0.2s var(--ease), border-color 0.2s var(--ease), color 0.2s var(--ease);
}
.footer-socials a:hover {
  background: var(--color-primary);
  border-color: var(--color-primary);
  color: #fff;
}
.footer-col h4 {
  font-size: 14px;
  font-weight: 600;
  color: #fff;
  margin-bottom: 18px;
}
.footer-col a {
  display: block;
  font-size: 13px;
  line-height: 2.2;
  color: rgba(255, 255, 255, 0.6);
  transition: color 0.2s var(--ease);
}
.footer-col a:hover {
  color: #fff;
}
.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.14);
  padding: 20px 0;
  font-size: 13px;
  text-align: center;
  color: rgba(255, 255, 255, 0.5);
  position: relative;
  z-index: 1;
}
@media (max-width: 1023px) {
  .main-nav {
    gap: 20px;
  }
  .content-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .content-card.card-wide {
    grid-template-columns: 1fr 1fr;
  }
  .card-wide .card-body {
    padding: 24px 24px 24px 0;
  }
  .card-wide .card-body h3 {
    font-size: 20px;
  }
  .stats-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 24px;
  }
  .stat-item {
    border-left: none;
    border-top: 1px solid var(--color-line);
    padding-top: 24px;
  }
  .stat-item:nth-child(1),
  .stat-item:nth-child(2) {
    border-top: none;
    padding-top: 16px;
  }
  .footer-grid {
    grid-template-columns: 1fr 1fr;
    gap: 40px;
  }
  .page-hero h1 {
    font-size: 38px;
  }
}
@media (max-width: 767px) {
  .container {
    padding: 0 16px;
  }
  .header-inner {
    height: 60px;
  }
  .main-nav {
    display: none;
  }
  .header-actions .btn-primary {
    display: none;
  }
  .nav-toggle {
    display: inline-flex;
  }
  .search-drop {
    right: -6px;
    width: calc(100vw - 32px);
  }
  .search-drop input {
    width: 100%;
  }
  .page-hero {
    min-height: 360px;
    padding: 100px 0 64px;
  }
  .page-hero h1 {
    font-size: 30px;
  }
  .hero-sub {
    font-size: 15px;
  }
  .hero-actions {
    flex-direction: column;
    align-items: stretch;
  }
  .hero-actions .btn {
    width: 100%;
  }
  .content-grid-section {
    padding: 64px 0 48px;
  }
  .section-head h2 {
    font-size: 28px;
  }
  .content-grid {
    grid-template-columns: 1fr;
    gap: 16px;
  }
  .content-card.card-wide {
    grid-template-columns: 1fr;
  }
  .card-wide .card-body {
    padding: 20px;
  }
  .card-wide .card-media {
    min-height: 180px;
  }
  .content-card.card-wide .card-media {
    aspect-ratio: 16 / 9;
  }
  .card-wide .card-body h3 {
    font-size: 18px;
  }
  .pagination {
    gap: 6px;
  }
  .page-link {
    min-width: 36px;
    height: 36px;
    padding: 0 10px;
    font-size: 13px;
  }
  .seo-block {
    padding: 20px;
  }
  .guide-section {
    padding: 64px 0;
  }
  .guide-grid {
    grid-template-columns: 1fr;
    gap: 32px;
  }
  .guide-content h2 {
    font-size: 26px;
  }
  .stats-section {
    padding: 56px 0;
  }
  .stats-grid {
    grid-template-columns: 1fr 1fr;
    gap: 20px;
  }
  .stat-num {
    font-size: 36px;
  }
  .faq-section {
    padding: 64px 0;
  }
  .faq-question {
    padding: 0 16px;
    min-height: 56px;
    font-size: 15px;
  }
  .faq-answer p {
    padding: 0 16px 20px;
  }
  .cta-band {
    padding: 56px 0;
  }
  .cta-band h2 {
    font-size: 26px;
  }
  .cta-band .btn {
    width: 100%;
  }
  .footer-grid {
    grid-template-columns: 1fr;
    gap: 32px;
    padding-bottom: 32px;
  }
  .footer-brand p {
    max-width: 100%;
  }
}
@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
  *,
  *::before,
  *::after {
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
  }
}

/* roulang page: article */
:root {
  --color-bg: #F5F9FC;
  --color-surface: #FFFFFF;
  --color-primary: #1A6E8A;
  --color-primary-dark: #0F3B57;
  --color-primary-soft: #E1EEF5;
  --color-accent: #C9A227;
  --color-text: #1E2A33;
  --color-text-sub: #5A6E7C;
  --color-line: #DDE7F0;
  --radius-card: 16px;
  --radius-btn: 10px;
  --shadow-card: 0 4px 16px rgba(15, 60, 85, 0.06);
  --shadow-hover: 0 12px 32px rgba(15, 60, 85, 0.12);
  --shadow-header: 0 4px 20px rgba(15, 60, 85, 0.08);
  --transition: 0.2s cubic-bezier(0.25, 0.1, 0.25, 1);
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  background: var(--color-bg);
  color: var(--color-text);
  line-height: 1.8;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
}

img {
  max-width: 100%;
  display: block;
}

a {
  color: var(--color-primary);
  text-decoration: none;
  transition: color var(--transition);
}

a:hover {
  color: var(--color-primary-dark);
}

button {
  font-family: inherit;
  cursor: pointer;
}

input,
textarea {
  font-family: inherit;
}

a:focus-visible,
button:focus-visible,
input:focus-visible,
textarea:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding-left: 24px;
  padding-right: 24px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  background: var(--color-primary);
  color: #fff;
  border: 1px solid transparent;
  border-radius: var(--radius-btn);
  padding: 14px 32px;
  font-size: 15px;
  font-weight: 600;
  line-height: 1.2;
  text-decoration: none;
  transition: all var(--transition);
}

.btn:hover {
  background: #155973;
  color: #fff;
  transform: translateY(-2px);
  box-shadow: 0 12px 32px rgba(26, 110, 138, 0.25);
}

.btn:active {
  transform: translateY(0);
  box-shadow: var(--shadow-card);
}

.btn:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
}

.btn-sm {
  padding: 10px 20px;
  font-size: 14px;
  border-radius: 8px;
}

.btn-lg {
  padding: 16px 40px;
  font-size: 16px;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid rgba(221, 231, 240, 0.7);
  box-shadow: var(--shadow-header);
  transition: box-shadow var(--transition), background var(--transition);
}

.site-header.scrolled {
  box-shadow: 0 6px 24px rgba(15, 60, 85, 0.12);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
  gap: 24px;
}

.logo {
  font-size: 24px;
  font-weight: 700;
  color: var(--color-primary-dark);
  letter-spacing: -0.01em;
  line-height: 1.2;
  white-space: nowrap;
}

.logo .logo-accent {
  color: var(--color-primary);
}

.main-nav {
  display: flex;
  align-items: center;
  gap: 32px;
  margin-left: auto;
}

.main-nav a {
  position: relative;
  font-size: 15px;
  font-weight: 500;
  color: var(--color-text);
  padding: 8px 2px;
  text-decoration: none;
  transition: color var(--transition);
}

.main-nav a::after {
  content: '';
  position: absolute;
  left: 0;
  bottom: 0;
  width: 100%;
  height: 2px;
  background: var(--color-primary);
  border-radius: 2px;
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--transition);
}

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

.main-nav a.active {
  color: var(--color-primary);
}

.main-nav a.active::after {
  transform: scaleX(1);
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 16px;
}

.header-search {
  position: relative;
}

.search-toggle {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border: 1px solid var(--color-line);
  border-radius: 10px;
  background: #fff;
  color: var(--color-text);
  transition: all var(--transition);
}

.search-toggle:hover {
  border-color: var(--color-primary);
  color: var(--color-primary);
}

.search-toggle svg {
  width: 18px;
  height: 18px;
}

.search-drop {
  position: absolute;
  top: calc(100% + 12px);
  right: 0;
  width: 260px;
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 8px;
  background: #fff;
  border: 1px solid var(--color-line);
  border-radius: 12px;
  box-shadow: var(--shadow-hover);
  opacity: 0;
  visibility: hidden;
  transform: translateY(8px);
  transition: all var(--transition);
  z-index: 10;
}

.search-drop.open {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.search-drop input {
  flex: 1;
  border: none;
  outline: none;
  font-size: 14px;
  padding: 8px 10px;
  background: transparent;
  color: var(--color-text);
}

.search-drop button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 34px;
  height: 34px;
  border: none;
  border-radius: 8px;
  background: var(--color-primary-soft);
  color: var(--color-primary);
  transition: background var(--transition);
}

.search-drop button:hover {
  background: var(--color-primary);
  color: #fff;
}

.search-drop button svg {
  width: 16px;
  height: 16px;
}

.nav-toggle {
  display: none;
  width: 40px;
  height: 40px;
  border: 1px solid var(--color-line);
  border-radius: 10px;
  background: #fff;
  color: var(--color-text);
  align-items: center;
  justify-content: center;
}

.nav-toggle svg {
  width: 20px;
  height: 20px;
}

.nav-toggle.active {
  color: var(--color-primary);
  border-color: var(--color-primary);
}

.breadcrumb {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px;
  padding: 24px 0 20px;
  font-size: 13px;
  color: var(--color-text-sub);
}

.breadcrumb a {
  color: var(--color-text-sub);
  transition: color var(--transition);
}

.breadcrumb a:hover {
  color: var(--color-primary);
}

.breadcrumb .sep {
  color: #B8C6D1;
}

.breadcrumb .current {
  color: var(--color-text-sub);
  max-width: 240px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  display: inline-block;
  vertical-align: bottom;
}

.article-main {
  padding: 8px 0 96px;
}

.article-wrap {
  max-width: 720px;
  margin: 0 auto;
  background: var(--color-surface);
  border-radius: 20px;
  padding: 48px;
  box-shadow: var(--shadow-card);
  border: 1px solid var(--color-line);
}

.article-header {
  margin-bottom: 32px;
  padding-bottom: 24px;
  border-bottom: 1px solid var(--color-line);
}

.article-header h1 {
  font-size: 38px;
  font-weight: 700;
  line-height: 1.3;
  letter-spacing: -0.01em;
  color: var(--color-text);
  margin-bottom: 16px;
}

.article-meta {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 10px;
  font-size: 14px;
  color: var(--color-text-sub);
}

.article-meta .dot {
  color: #B8C6D1;
}

.article-body {
  font-size: 17px;
  line-height: 1.8;
  color: #2C3A47;
}

.article-body p {
  margin-bottom: 1.6em;
}

.article-body h2 {
  font-size: 26px;
  font-weight: 700;
  color: var(--color-text);
  margin: 32px 0 16px;
}

.article-body h3 {
  font-size: 20px;
  font-weight: 600;
  color: var(--color-text);
  margin: 24px 0 12px;
}

.article-body h4 {
  font-size: 17px;
  font-weight: 600;
  color: var(--color-text);
  margin: 20px 0 8px;
}

.article-body img {
  max-width: 100%;
  height: auto;
  border-radius: 12px;
  margin: 24px 0;
}

.article-body blockquote {
  border-left: 4px solid var(--color-primary);
  background: #F2F7FB;
  border-radius: 8px;
  padding: 16px 20px;
  margin: 24px 0;
  color: var(--color-text-sub);
  font-style: normal;
}

.article-body ul,
.article-body ol {
  margin: 16px 0 24px;
  padding-left: 24px;
}

.article-body li {
  margin-bottom: 8px;
}

.article-body li::marker {
  color: var(--color-primary);
}

.article-body a {
  color: var(--color-primary);
  text-decoration: underline;
  text-underline-offset: 2px;
}

.article-body a:hover {
  color: var(--color-primary-dark);
}

.article-body table {
  width: 100%;
  border-collapse: collapse;
  margin: 24px 0;
  font-size: 15px;
}

.article-body th,
.article-body td {
  border: 1px solid var(--color-line);
  padding: 10px 14px;
  text-align: left;
}

.article-body th {
  background: var(--color-primary-soft);
  font-weight: 600;
}

.article-body pre,
.article-body code {
  background: #F2F7FB;
  border-radius: 6px;
  font-family: "SFMono-Regular", Consolas, monospace;
}

.article-body code {
  padding: 2px 6px;
  font-size: 0.9em;
}

.article-body pre {
  padding: 16px;
  overflow-x: auto;
  margin: 24px 0;
}

.article-body pre code {
  background: none;
  padding: 0;
}

.article-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin: 40px 0 32px;
  padding-top: 24px;
  border-top: 1px solid var(--color-line);
}

.tag {
  display: inline-flex;
  align-items: center;
  padding: 6px 14px;
  background: var(--color-primary-soft);
  color: var(--color-primary);
  border-radius: 999px;
  font-size: 13px;
  font-weight: 500;
}

.article-pager {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
  margin-top: 24px;
}

.pager-card {
  background: var(--color-bg);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-card);
  padding: 20px 24px;
  transition: all var(--transition);
}

.pager-card:hover {
  border-color: var(--color-primary);
  box-shadow: var(--shadow-hover);
  transform: translateY(-2px);
}

.pager-label {
  display: block;
  font-size: 12px;
  color: var(--color-text-sub);
  margin-bottom: 6px;
}

.pager-card a {
  font-size: 16px;
  font-weight: 600;
  color: var(--color-text);
  transition: color var(--transition);
}

.pager-card a:hover {
  color: var(--color-primary);
}

.article-empty {
  max-width: 720px;
  margin: 80px auto;
  text-align: center;
  padding: 60px 32px;
  background: var(--color-surface);
  border-radius: var(--radius-card);
  border: 1px solid var(--color-line);
  box-shadow: var(--shadow-card);
}

.empty-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 80px;
  height: 80px;
  border-radius: 20px;
  background: var(--color-primary-soft);
  color: var(--color-primary);
  margin-bottom: 24px;
}

.empty-icon svg {
  width: 40px;
  height: 40px;
}

.article-empty h1 {
  font-size: 28px;
  font-weight: 700;
  margin-bottom: 12px;
  color: var(--color-text);
}

.article-empty p {
  color: var(--color-text-sub);
  margin-bottom: 32px;
}

.related-section {
  padding: 80px 0;
  background: var(--color-surface);
  border-top: 1px solid var(--color-line);
}

.section-head {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-bottom: 32px;
}

.section-head h2 {
  font-size: 32px;
  font-weight: 700;
  color: var(--color-text);
  letter-spacing: -0.01em;
}

.section-head .bar {
  width: 48px;
  height: 4px;
  background: var(--color-accent);
  border-radius: 2px;
}

.related-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.related-card {
  display: flex;
  flex-direction: column;
  background: var(--color-bg);
  border-radius: var(--radius-card);
  overflow: hidden;
  text-decoration: none;
  border: 1px solid var(--color-line);
  transition: all var(--transition);
}

.related-card:hover {
  box-shadow: var(--shadow-hover);
  transform: translateY(-4px);
  border-color: transparent;
}

.related-card:hover .read-link {
  color: var(--color-primary);
}

.related-card:hover h3 {
  color: var(--color-primary);
}

.related-img {
  aspect-ratio: 16 / 9;
  overflow: hidden;
  background: var(--color-primary-soft);
}

.related-img img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.related-body {
  padding: 20px;
  display: flex;
  flex-direction: column;
  gap: 8px;
  flex: 1;
}

.badge {
  display: inline-flex;
  align-items: center;
  align-self: flex-start;
  padding: 4px 12px;
  background: var(--color-primary-soft);
  color: var(--color-primary);
  border-radius: 999px;
  font-size: 12px;
  font-weight: 500;
}

.related-body h3 {
  font-size: 20px;
  font-weight: 600;
  color: var(--color-text);
  transition: color var(--transition);
}

.related-body p {
  font-size: 14px;
  color: var(--color-text-sub);
  line-height: 1.6;
  flex: 1;
}

.read-link {
  font-size: 14px;
  font-weight: 600;
  color: var(--color-text-sub);
  transition: color var(--transition);
}

.cta-band {
  padding: 80px 0;
  text-align: center;
  background: linear-gradient(135deg, rgba(234, 242, 248, 0.92), rgba(220, 235, 243, 0.88)), url('/assets/images/backpic/back-1.webp') center/cover no-repeat;
  border-top: 1px solid var(--color-line);
}

.cta-band h2 {
  font-size: 32px;
  font-weight: 700;
  color: var(--color-primary-dark);
  margin-bottom: 12px;
  letter-spacing: -0.01em;
}

.cta-band p {
  font-size: 16px;
  color: var(--color-text-sub);
  margin-bottom: 32px;
}

.site-footer {
  background: var(--color-primary-dark);
  color: #C6D6E2;
  padding: 72px 0 0;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr 1fr;
  gap: 48px;
  padding-bottom: 48px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.footer-brand .logo {
  color: #fff;
  font-size: 24px;
  font-weight: 700;
  margin-bottom: 16px;
}

.footer-brand p {
  font-size: 14px;
  line-height: 1.8;
  color: #9FB6C6;
  margin-bottom: 20px;
  max-width: 300px;
}

.footer-socials {
  display: flex;
  gap: 12px;
}

.footer-socials a {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border: 1px solid rgba(255, 255, 255, 0.2);
  border-radius: 50%;
  color: #C6D6E2;
  font-size: 13px;
  text-decoration: none;
  transition: all var(--transition);
}

.footer-socials a:hover {
  background: var(--color-primary);
  border-color: var(--color-primary);
  color: #fff;
}

.footer-col h4 {
  color: #fff;
  font-size: 14px;
  font-weight: 600;
  margin-bottom: 16px;
}

.footer-col a {
  display: block;
  color: #9FB6C6;
  font-size: 13px;
  line-height: 2.2;
  text-decoration: none;
  transition: color var(--transition);
}

.footer-col a:hover {
  color: #fff;
}

.footer-bottom {
  padding: 24px 0;
  text-align: center;
  font-size: 13px;
  color: #8AA3B5;
}

@media (prefers-reduced-motion: reduce) {
  * {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}

@media (max-width: 1024px) {
  .main-nav {
    gap: 20px;
  }

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

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

  .related-card:last-child {
    grid-column: span 2;
  }

  .related-card:last-child .related-img {
    aspect-ratio: 21 / 9;
  }

  .article-header h1 {
    font-size: 34px;
  }
}

@media (max-width: 767px) {
  .header-inner {
    height: 60px;
    gap: 12px;
  }

  .main-nav {
    position: fixed;
    top: 60px;
    left: 0;
    right: 0;
    background: rgba(255, 255, 255, 0.98);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border-bottom: 1px solid var(--color-line);
    box-shadow: var(--shadow-header);
    padding: 16px 24px 24px;
    display: none;
    flex-direction: column;
    align-items: flex-start;
    margin: 0;
    gap: 0;
  }

  .main-nav.open {
    display: flex;
  }

  .main-nav a {
    display: block;
    width: 100%;
    font-size: 22px;
    line-height: 48px;
    border-bottom: 1px solid #EDF3F8;
  }

  .main-nav a:last-child {
    border-bottom: none;
  }

  .main-nav a::after {
    display: none;
  }

  .main-nav a.active {
    font-weight: 600;
  }

  .nav-toggle {
    display: inline-flex;
  }

  .header-actions .btn-sm {
    display: none;
  }

  .search-drop {
    right: -60px;
  }

  .article-main {
    padding: 8px 0 64px;
  }

  .article-wrap {
    padding: 28px 20px;
  }

  .article-header h1 {
    font-size: 28px;
  }

  .article-meta {
    font-size: 13px;
    gap: 6px;
  }

  .article-body {
    font-size: 16px;
  }

  .article-body h2 {
    font-size: 22px;
  }

  .article-body h3 {
    font-size: 18px;
  }

  .article-pager {
    grid-template-columns: 1fr;
  }

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

  .related-card:last-child {
    grid-column: span 1;
  }

  .related-card:last-child .related-img {
    aspect-ratio: 16 / 9;
  }

  .section-head h2 {
    font-size: 26px;
  }

  .cta-band {
    padding: 60px 0;
  }

  .cta-band h2 {
    font-size: 24px;
  }

  .cta-band p {
    font-size: 15px;
  }

  .footer-grid {
    grid-template-columns: 1fr;
    gap: 32px;
  }

  .breadcrumb {
    padding-top: 16px;
  }
}

@media (max-width: 520px) {
  .container {
    padding-left: 16px;
    padding-right: 16px;
  }

  .article-header h1 {
    font-size: 24px;
  }

  .article-wrap {
    padding: 24px 16px;
    border-radius: 14px;
  }

  .btn-lg {
    width: 100%;
  }

  .breadcrumb .current {
    max-width: 160px;
  }

  .footer-grid {
    gap: 24px;
  }
}

/* roulang page: category2 */
:root {
  --color-bg: #F5F9FC;
  --color-surface: #FFFFFF;
  --color-primary: #1A6E8A;
  --color-primary-dark: #0F3B57;
  --color-primary-soft: #E1EEF5;
  --color-accent: #C9A227;
  --color-text: #1E2A33;
  --color-text-sub: #5A6E7C;
  --color-line: #DDE7F0;
  --color-white: #FFFFFF;
  --color-danger: #D9534F;
  --color-success: #2E9B68;
  --font-stack: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  --container-max: 1200px;
  --container-pad: 24px;
  --radius-card: 16px;
  --radius-btn: 10px;
  --radius-input: 10px;
  --radius-round: 999px;
  --shadow-card: 0 4px 16px rgba(15, 60, 85, 0.06);
  --shadow-hover: 0 12px 32px rgba(15, 60, 85, 0.12);
  --shadow-nav: 0 4px 20px rgba(15, 60, 85, 0.08);
  --transition: 0.2s cubic-bezier(0.25, 0.1, 0.25, 1);
  --transition-slow: 0.4s cubic-bezier(0.25, 0.1, 0.25, 1);
}

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

html {
  scroll-behavior: smooth;
}

html:focus-within {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-stack);
  font-size: 16px;
  line-height: 1.8;
  color: var(--color-text);
  background-color: var(--color-bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

img {
  max-width: 100%;
  display: block;
}

a {
  color: var(--color-primary);
  text-decoration: none;
  transition: color var(--transition);
}

a:hover {
  color: var(--color-primary-dark);
}

button {
  font-family: inherit;
  cursor: pointer;
  border: none;
  background: none;
}

input {
  font-family: inherit;
  border: none;
  outline: none;
}

ul,
ol {
  list-style: none;
}

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

.section {
  padding: 96px 0;
}

.section-head {
  max-width: 720px;
  margin-bottom: 48px;
}

.section-title {
  font-size: 36px;
  font-weight: 700;
  line-height: 1.3;
  letter-spacing: -0.01em;
  color: var(--color-text);
  margin-bottom: 16px;
}

.section-bar {
  width: 48px;
  height: 4px;
  background: var(--color-accent);
  border-radius: 2px;
  margin-bottom: 20px;
}

.section-sub {
  font-size: 16px;
  color: var(--color-text-sub);
  line-height: 1.8;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-size: 15px;
  font-weight: 600;
  padding: 14px 32px;
  border-radius: var(--radius-btn);
  transition: all var(--transition);
  text-align: center;
  line-height: 1.4;
  position: relative;
}

.btn:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
}

.btn-primary {
  background: var(--color-primary);
  color: var(--color-white);
  box-shadow: 0 4px 14px rgba(26, 110, 138, 0.2);
}

.btn-primary:hover {
  background: #155973;
  color: var(--color-white);
  transform: translateY(-2px);
  box-shadow: var(--shadow-hover);
}

.btn-primary:active {
  transform: translateY(0);
  box-shadow: 0 2px 8px rgba(26, 110, 138, 0.15);
}

.btn-outline {
  background: var(--color-surface);
  color: var(--color-primary);
  border: 1px solid var(--color-primary);
}

.btn-outline:hover {
  background: var(--color-primary-soft);
  color: var(--color-primary-dark);
  transform: translateY(-2px);
  box-shadow: var(--shadow-card);
}

.btn-outline:active {
  transform: translateY(0);
  box-shadow: none;
}

.btn-sm {
  padding: 10px 22px;
  font-size: 14px;
}

/* ===== Header / Nav ===== */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  height: 72px;
  background: rgba(255, 255, 255, 0.65);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  border-bottom: 1px solid rgba(255, 255, 255, 0.3);
  box-shadow: 0 2px 12px rgba(15, 60, 85, 0.06);
  transition: background var(--transition-slow), box-shadow var(--transition-slow), height var(--transition-slow);
}

.site-header.scrolled {
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  box-shadow: var(--shadow-nav);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
}

.logo {
  font-size: 24px;
  font-weight: 700;
  color: var(--color-primary-dark);
  letter-spacing: -0.01em;
  display: inline-flex;
  align-items: center;
  gap: 2px;
  white-space: nowrap;
}

.logo .logo-accent {
  color: var(--color-primary);
}

.main-nav {
  display: flex;
  align-items: center;
  gap: 36px;
}

.main-nav a {
  font-size: 15px;
  font-weight: 500;
  color: var(--color-text);
  padding: 8px 0;
  position: relative;
  line-height: 1.4;
}

.main-nav a::after {
  content: '';
  position: absolute;
  left: 0;
  bottom: 0;
  width: 100%;
  height: 2px;
  background: var(--color-primary);
  border-radius: 2px;
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--transition);
}

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

.main-nav a:hover::after {
  transform: scaleX(1);
}

.main-nav a.active {
  color: var(--color-primary);
}

.main-nav a.active::after {
  transform: scaleX(1);
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 14px;
}

.header-search {
  position: relative;
}

.search-toggle {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: var(--radius-round);
  color: var(--color-text);
  transition: background var(--transition), color var(--transition);
}

.search-toggle:hover {
  background: var(--color-primary-soft);
  color: var(--color-primary);
}

.search-toggle svg {
  width: 20px;
  height: 20px;
}

.search-toggle:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
}

.search-drop {
  position: absolute;
  top: 48px;
  right: 0;
  display: flex;
  align-items: center;
  gap: 6px;
  background: var(--color-surface);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-round);
  padding: 6px 8px 6px 16px;
  box-shadow: var(--shadow-card);
  min-width: 260px;
  opacity: 0;
  visibility: hidden;
  transform: translateY(-8px);
  transition: opacity var(--transition), transform var(--transition), visibility var(--transition);
}

.search-drop.open {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.search-drop input {
  flex: 1;
  font-size: 14px;
  color: var(--color-text);
  background: transparent;
  border: none;
  outline: none;
}

.search-drop input::placeholder {
  color: var(--color-text-sub);
}

.search-drop button {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 34px;
  height: 34px;
  border-radius: var(--radius-round);
  background: var(--color-primary);
  color: var(--color-white);
  transition: background var(--transition);
}

.search-drop button:hover {
  background: var(--color-primary-dark);
}

.search-drop button svg {
  width: 16px;
  height: 16px;
}

.nav-toggle {
  display: none;
  align-items: center;
  justify-content: center;
  width: 42px;
  height: 42px;
  border-radius: var(--radius-btn);
  color: var(--color-text);
  transition: background var(--transition);
}

.nav-toggle:hover {
  background: var(--color-primary-soft);
}

.nav-toggle svg {
  width: 22px;
  height: 22px;
}

.nav-toggle:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
}

/* ===== Category Hero ===== */
.cat-hero {
  position: relative;
  min-height: 400px;
  padding: 160px 0 80px;
  background-color: #EAF2F8;
  overflow: hidden;
}

.cat-hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background: url('/assets/images/backpic/back-1.webp') right center / cover no-repeat;
  opacity: 0.22;
  z-index: 0;
}

.cat-hero::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 80px;
  background: linear-gradient(180deg, rgba(245, 249, 252, 0), rgba(245, 249, 252, 1));
  z-index: 1;
}

.cat-hero .container {
  position: relative;
  z-index: 2;
}

.cat-hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: var(--color-surface);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-round);
  padding: 6px 18px;
  font-size: 13px;
  font-weight: 600;
  color: var(--color-primary);
  box-shadow: var(--shadow-card);
  margin-bottom: 20px;
}

.cat-hero-badge::before {
  content: '';
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--color-accent);
}

.cat-hero h1 {
  font-size: 48px;
  font-weight: 700;
  line-height: 1.25;
  letter-spacing: -0.01em;
  color: var(--color-primary-dark);
  margin-bottom: 18px;
}

.cat-hero-desc {
  font-size: 17px;
  line-height: 1.8;
  color: var(--color-text-sub);
  max-width: 640px;
  margin-bottom: 32px;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
}

/* ===== Features ===== */
.features {
  background: var(--color-surface);
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}

.feature-card {
  background: var(--color-bg);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-card);
  padding: 32px 24px;
  transition: box-shadow var(--transition), transform var(--transition);
}

.feature-card:hover {
  box-shadow: var(--shadow-card);
  transform: translateY(-4px);
}

.feature-icon {
  width: 48px;
  height: 48px;
  border-radius: 12px;
  background: var(--color-primary-soft);
  color: var(--color-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 18px;
}

.feature-icon svg {
  width: 22px;
  height: 22px;
}

.feature-card h3 {
  font-size: 18px;
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: 8px;
}

.feature-card p {
  font-size: 14px;
  line-height: 1.7;
  color: var(--color-text-sub);
}

/* ===== Content Cards ===== */
.content-cards {
  background: var(--color-bg);
}

.card-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.content-card {
  background: var(--color-surface);
  border-radius: var(--radius-card);
  overflow: hidden;
  box-shadow: var(--shadow-card);
  transition: box-shadow var(--transition), transform var(--transition);
  display: flex;
  flex-direction: column;
}

.content-card:hover {
  box-shadow: var(--shadow-hover);
  transform: translateY(-4px);
}

.card-media {
  position: relative;
  aspect-ratio: 16 / 9;
  overflow: hidden;
  background: var(--color-primary-soft);
}

.card-media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--transition-slow);
}

.content-card:hover .card-media img {
  transform: scale(1.04);
}

.card-badge {
  position: absolute;
  top: 12px;
  left: 12px;
  background: var(--color-accent);
  color: var(--color-white);
  font-size: 12px;
  font-weight: 600;
  padding: 3px 12px;
  border-radius: var(--radius-round);
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.12);
}

.card-body {
  padding: 22px 22px 24px;
  flex: 1;
  display: flex;
  flex-direction: column;
}

.card-title {
  font-size: 18px;
  font-weight: 600;
  color: var(--color-text);
  line-height: 1.45;
  margin-bottom: 8px;
}

.card-title a {
  color: inherit;
}

.card-title a:hover {
  color: var(--color-primary);
}

.card-desc {
  font-size: 14px;
  line-height: 1.7;
  color: var(--color-text-sub);
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  margin-bottom: 16px;
}

.card-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-top: auto;
  padding-top: 12px;
  border-top: 1px solid var(--color-line);
  font-size: 13px;
  color: var(--color-text-sub);
}

.card-meta .meta-tag {
  background: var(--color-primary-soft);
  color: var(--color-primary);
  padding: 2px 10px;
  border-radius: var(--radius-round);
  font-weight: 500;
  font-size: 12px;
}

.card-link {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  font-size: 14px;
  font-weight: 600;
  color: var(--color-primary);
}

.card-link:hover {
  color: var(--color-primary-dark);
}

.card-link svg {
  width: 15px;
  height: 15px;
  transition: transform var(--transition);
}

.card-link:hover svg {
  transform: translateX(4px);
}

/* ===== Scenarios ===== */
.scenarios {
  background: var(--color-surface);
}

.scenarios-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.scenario-card {
  border: 1px solid var(--color-line);
  border-radius: var(--radius-card);
  padding: 32px 28px;
  background: var(--color-bg);
  position: relative;
  overflow: hidden;
  transition: box-shadow var(--transition), transform var(--transition);
}

.scenario-card:hover {
  box-shadow: var(--shadow-card);
  transform: translateY(-4px);
}

.scenario-num {
  font-size: 40px;
  font-weight: 700;
  color: var(--color-primary-soft);
  line-height: 1;
  margin-bottom: 14px;
}

.scenario-card h3 {
  font-size: 18px;
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: 10px;
}

.scenario-card p {
  font-size: 14px;
  line-height: 1.75;
  color: var(--color-text-sub);
}

/* ===== Steps ===== */
.steps {
  background: var(--color-primary-dark);
  position: relative;
  overflow: hidden;
}

.steps::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image: radial-gradient(circle, rgba(255, 255, 255, 0.06) 1px, transparent 1px);
  background-size: 24px 24px;
  opacity: 0.5;
  z-index: 0;
}

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

.steps .section-title,
.steps .section-sub {
  color: var(--color-white);
}

.steps .section-bar {
  background: var(--color-accent);
}

.steps .section-sub {
  color: rgba(255, 255, 255, 0.7);
}

.steps-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  margin-top: 48px;
}

.step-item {
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(255, 255, 255, 0.14);
  border-radius: var(--radius-card);
  padding: 28px 22px;
  text-align: center;
  transition: background var(--transition), border-color var(--transition);
}

.step-item:hover {
  background: rgba(255, 255, 255, 0.1);
  border-color: rgba(255, 255, 255, 0.25);
}

.step-num {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  border-radius: var(--radius-round);
  background: var(--color-accent);
  color: var(--color-white);
  font-size: 16px;
  font-weight: 700;
  margin-bottom: 16px;
}

.step-item h3 {
  font-size: 16px;
  font-weight: 600;
  color: var(--color-white);
  margin-bottom: 8px;
}

.step-item p {
  font-size: 13px;
  line-height: 1.7;
  color: rgba(255, 255, 255, 0.7);
}

/* ===== FAQ ===== */
.faq {
  background: var(--color-bg);
}

.faq-list {
  display: flex;
  flex-direction: column;
  gap: 16px;
  max-width: 860px;
}

.faq-item {
  background: var(--color-surface);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-card);
  overflow: hidden;
  transition: box-shadow var(--transition);
}

.faq-item:hover {
  box-shadow: var(--shadow-card);
}

.faq-question {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 20px 24px;
  background: none;
  font-size: 16px;
  font-weight: 600;
  color: var(--color-text);
  text-align: left;
  line-height: 1.5;
  border: none;
  cursor: pointer;
  transition: color var(--transition);
}

.faq-question:hover {
  color: var(--color-primary);
}

.faq-question:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: -2px;
  border-radius: var(--radius-card);
}

.faq-icon {
  flex-shrink: 0;
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background: var(--color-primary-soft);
  color: var(--color-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
  font-weight: 400;
  transition: transform var(--transition), background var(--transition);
}

.faq-item.open .faq-icon {
  transform: rotate(45deg);
  background: var(--color-primary);
  color: var(--color-white);
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height var(--transition-slow);
}

.faq-answer-inner {
  padding: 0 24px 20px;
  font-size: 14px;
  line-height: 1.8;
  color: var(--color-text-sub);
}

/* ===== CTA Band ===== */
.cta-band {
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
  padding: 80px 0;
  position: relative;
  overflow: hidden;
}

.cta-band::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image: radial-gradient(circle, rgba(255, 255, 255, 0.07) 1px, transparent 1px);
  background-size: 28px 28px;
  z-index: 0;
}

.cta-inner {
  position: relative;
  z-index: 1;
  text-align: center;
  max-width: 640px;
  margin: 0 auto;
}

.cta-inner h2 {
  font-size: 36px;
  font-weight: 700;
  color: var(--color-white);
  line-height: 1.35;
  margin-bottom: 14px;
}

.cta-inner p {
  font-size: 16px;
  color: rgba(255, 255, 255, 0.8);
  margin-bottom: 32px;
}

.cta-actions {
  display: flex;
  justify-content: center;
  gap: 14px;
  flex-wrap: wrap;
}

.cta-band .btn-primary {
  background: var(--color-accent);
  color: var(--color-primary-dark);
}

.cta-band .btn-primary:hover {
  background: #b8911e;
  color: var(--color-primary-dark);
}

.cta-band .btn-outline {
  background: transparent;
  color: var(--color-white);
  border-color: rgba(255, 255, 255, 0.6);
}

.cta-band .btn-outline:hover {
  background: rgba(255, 255, 255, 0.12);
  color: var(--color-white);
}

/* ===== Footer ===== */
.site-footer {
  background: var(--color-primary-dark);
  color: rgba(255, 255, 255, 0.7);
  padding-top: 72px;
  padding-bottom: 28px;
  position: relative;
  overflow: hidden;
}

.site-footer::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image: radial-gradient(circle, rgba(255, 255, 255, 0.04) 1px, transparent 1px);
  background-size: 20px 20px;
  z-index: 0;
}

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

.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr 1fr;
  gap: 48px;
  padding-bottom: 48px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.12);
}

.footer-brand .logo {
  color: var(--color-white);
  margin-bottom: 14px;
}

.footer-brand .logo .logo-accent {
  color: var(--color-accent);
}

.footer-brand p {
  font-size: 14px;
  line-height: 1.75;
  color: rgba(255, 255, 255, 0.6);
  max-width: 320px;
  margin-bottom: 20px;
}

.footer-socials {
  display: flex;
  gap: 12px;
}

.footer-socials a {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 38px;
  height: 38px;
  border-radius: 50%;
  border: 1px solid rgba(255, 255, 255, 0.3);
  color: rgba(255, 255, 255, 0.7);
  font-size: 14px;
  transition: background var(--transition), color var(--transition), border-color var(--transition);
}

.footer-socials a:hover {
  background: var(--color-primary);
  border-color: var(--color-primary);
  color: var(--color-white);
}

.footer-col h4 {
  font-size: 14px;
  font-weight: 600;
  color: var(--color-white);
  margin-bottom: 18px;
}

.footer-col a {
  display: block;
  font-size: 13px;
  line-height: 2.2;
  color: rgba(255, 255, 255, 0.55);
  transition: color var(--transition);
}

.footer-col a:hover {
  color: var(--color-white);
}

.footer-bottom {
  padding-top: 24px;
  text-align: center;
  font-size: 13px;
  color: rgba(255, 255, 255, 0.45);
}

/* ===== Responsive ===== */
@media (max-width: 1023px) {
  .section {
    padding: 72px 0;
  }

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

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

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

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

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

  .cat-hero h1 {
    font-size: 40px;
  }

  .main-nav {
    gap: 20px;
  }

  .main-nav a {
    font-size: 14px;
  }
}

@media (max-width: 767px) {
  .container {
    padding-left: 16px;
    padding-right: 16px;
  }

  .section {
    padding: 56px 0;
  }

  .site-header {
    height: 60px;
  }

  .main-nav {
    position: fixed;
    top: 60px;
    left: 0;
    right: 0;
    bottom: 0;
    background: var(--color-surface);
    flex-direction: column;
    align-items: flex-start;
    gap: 0;
    padding: 24px 32px;
    box-shadow: var(--shadow-nav);
    transform: translateX(100%);
    transition: transform var(--transition-slow);
    overflow-y: auto;
    z-index: 999;
  }

  .main-nav.open {
    transform: translateX(0);
  }

  .main-nav a {
    font-size: 22px;
    line-height: 48px;
    color: var(--color-text);
    border-bottom: 1px solid var(--color-line);
    width: 100%;
    padding: 8px 0;
  }

  .main-nav a::after {
    display: none;
  }

  .main-nav a.active {
    color: var(--color-primary);
  }

  .nav-toggle {
    display: flex;
  }

  .header-actions .btn-sm {
    display: none;
  }

  .search-drop {
    position: fixed;
    top: 60px;
    left: 16px;
    right: 16px;
    min-width: auto;
    z-index: 1001;
  }

  .cat-hero {
    min-height: 360px;
    padding: 120px 0 60px;
  }

  .cat-hero h1 {
    font-size: 32px;
  }

  .cat-hero-desc {
    font-size: 15px;
  }

  .section-title {
    font-size: 28px;
  }

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

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

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

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

  .footer-grid {
    grid-template-columns: 1fr;
    gap: 32px;
  }

  .cta-band {
    padding: 56px 0;
  }

  .cta-inner h2 {
    font-size: 28px;
  }

  .hero-actions .btn {
    width: 100%;
  }

  .cta-actions .btn {
    width: 100%;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}

/* roulang page: category3 */
:root {
  --color-bg: #F5F9FC;
  --color-surface: #FFFFFF;
  --color-primary: #1A6E8A;
  --color-primary-dark: #0F3B57;
  --color-primary-soft: #E1EEF5;
  --color-accent: #C9A227;
  --color-text: #1E2A33;
  --color-text-sub: #5A6E7C;
  --color-line: #DDE7F0;
  --radius-card: 16px;
  --radius-btn: 10px;
  --radius-input: 10px;
  --shadow-card: 0 4px 16px rgba(15, 60, 85, 0.06);
  --shadow-hover: 0 12px 32px rgba(15, 60, 85, 0.12);
  --shadow-nav: 0 4px 20px rgba(15, 60, 85, 0.08);
  --container-w: 1200px;
  --space-section: 96px;
  --font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  --transition: cubic-bezier(0.25, 0.1, 0.25, 1);
}
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}
html {
  scroll-behavior: smooth;
}
body {
  font-family: var(--font-family);
  background: var(--color-bg);
  color: var(--color-text);
  line-height: 1.8;
  -webkit-font-smoothing: antialiased;
}
body.menu-open {
  overflow: hidden;
}
img {
  max-width: 100%;
  display: block;
}
a {
  color: var(--color-primary);
  text-decoration: none;
  transition: color 0.2s ease;
}
a:hover {
  color: #155973;
}
button {
  font-family: inherit;
  border: none;
  background: none;
  cursor: pointer;
  color: inherit;
}
input {
  font-family: inherit;
  outline: none;
}
ul, ol {
  list-style: none;
}
:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
}
.container {
  max-width: var(--container-w);
  margin: 0 auto;
  padding-left: 24px;
  padding-right: 24px;
}
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-size: 15px;
  font-weight: 600;
  line-height: 1.2;
  padding: 14px 32px;
  border-radius: var(--radius-btn);
  transition: all 0.2s var(--transition);
  white-space: nowrap;
}
.btn-primary {
  background: var(--color-primary);
  color: #fff;
}
.btn-primary:hover {
  background: #155973;
  color: #fff;
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(26, 110, 138, 0.25);
}
.btn-primary:active {
  transform: translateY(0);
  box-shadow: none;
}
.btn-outline {
  border: 1px solid var(--color-primary);
  color: var(--color-primary);
  background: #fff;
}
.btn-outline:hover {
  background: var(--color-primary-soft);
  color: var(--color-primary);
  transform: translateY(-2px);
}
.btn-outline-light {
  border: 1px solid rgba(255, 255, 255, 0.8);
  color: #fff;
  background: rgba(255, 255, 255, 0.12);
}
.btn-outline-light:hover {
  background: rgba(255, 255, 255, 0.22);
  color: #fff;
  transform: translateY(-2px);
}
.btn-lg {
  padding: 16px 40px;
  font-size: 16px;
}
.btn-sm {
  padding: 10px 20px;
  font-size: 14px;
}

/* ========== Header / Nav ========== */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 72px;
  z-index: 100;
  background: rgba(255, 255, 255, 0.65);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  border-bottom: 1px solid rgba(255, 255, 255, 0.3);
  box-shadow: 0 2px 12px rgba(15, 60, 85, 0.06);
  transition: background 0.4s var(--transition), box-shadow 0.4s var(--transition);
}
.site-header.is-scrolled {
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  box-shadow: var(--shadow-nav);
}
.inner-page .site-header {
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  box-shadow: var(--shadow-nav);
}
.inner-page .site-header.is-scrolled {
  box-shadow: 0 6px 28px rgba(15, 60, 85, 0.14);
}
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
}
.logo {
  font-size: 24px;
  font-weight: 700;
  color: var(--color-primary-dark);
  letter-spacing: -0.01em;
  line-height: 1.3;
  flex-shrink: 0;
}
.logo .logo-accent {
  color: var(--color-primary);
}
.main-nav {
  display: flex;
  align-items: center;
  gap: 32px;
}
.main-nav a {
  font-size: 15px;
  font-weight: 500;
  color: var(--color-text);
  padding: 8px 2px;
  position: relative;
  transition: color 0.2s ease;
}
.main-nav a:hover {
  color: var(--color-primary);
}
.main-nav a.active {
  color: var(--color-primary);
  font-weight: 600;
}
.main-nav a.active::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 0;
  width: 100%;
  height: 2px;
  background: var(--color-primary);
  border-radius: 2px;
}
.header-actions {
  display: flex;
  align-items: center;
  gap: 16px;
}
.header-search {
  position: relative;
}
.search-toggle {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: var(--radius-btn);
  color: var(--color-text);
  transition: background 0.2s ease, color 0.2s ease;
}
.search-toggle:hover {
  background: var(--color-primary-soft);
  color: var(--color-primary);
}
.search-toggle svg {
  width: 20px;
  height: 20px;
}
.search-drop {
  position: absolute;
  top: calc(100% + 8px);
  right: 0;
  display: none;
  align-items: center;
  background: #fff;
  border: 1px solid var(--color-line);
  border-radius: 999px;
  box-shadow: var(--shadow-card);
  padding: 4px 4px 4px 16px;
  z-index: 20;
}
.search-drop.search-open {
  display: flex;
}
.search-drop input {
  width: 220px;
  border: none;
  font-size: 14px;
  color: var(--color-text);
  background: transparent;
}
.search-drop input::placeholder {
  color: var(--color-text-sub);
}
.search-drop button {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: var(--color-primary);
  color: #fff;
  transition: background 0.2s ease;
}
.search-drop button:hover {
  background: #155973;
}
.search-drop button svg {
  width: 16px;
  height: 16px;
}
.nav-toggle {
  display: none;
  width: 44px;
  height: 44px;
  border-radius: var(--radius-btn);
  align-items: center;
  justify-content: center;
  color: var(--color-text);
}
.nav-toggle:hover {
  background: var(--color-primary-soft);
  color: var(--color-primary);
}
.nav-toggle svg {
  width: 24px;
  height: 24px;
}

/* ========== Page Hero ========== */
.page-hero {
  position: relative;
  min-height: 420px;
  padding: 120px 0 80px;
  background: #EAF2F8;
  display: flex;
  align-items: center;
  overflow: hidden;
}
.page-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image: url('/assets/images/backpic/back-1.webp');
  background-size: cover;
  background-position: center;
  opacity: 0.2;
  pointer-events: none;
}
.page-hero::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(234, 242, 248, 0.5) 0%, rgba(225, 238, 245, 0.85) 100%);
  pointer-events: none;
}
.page-hero .container {
  position: relative;
  z-index: 2;
}
.hero-kicker {
  display: inline-block;
  padding: 6px 16px;
  background: var(--color-accent);
  color: #fff;
  font-size: 13px;
  font-weight: 600;
  border-radius: 999px;
  margin-bottom: 20px;
  letter-spacing: 0.02em;
}
.page-hero h1 {
  font-size: 48px;
  font-weight: 700;
  color: var(--color-primary-dark);
  line-height: 1.3;
  letter-spacing: -0.01em;
  margin-bottom: 16px;
}
.hero-subtitle {
  font-size: 17px;
  color: #3A5060;
  max-width: 640px;
  line-height: 1.8;
  margin-bottom: 32px;
}
.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
}
.scroll-indicator {
  position: absolute;
  bottom: 32px;
  left: 50%;
  transform: translateX(-50%);
  width: 44px;
  height: 44px;
  border: 1.5px solid rgba(15, 60, 85, 0.35);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: rgba(15, 60, 85, 0.55);
  z-index: 3;
  transition: all 0.2s ease;
}
.scroll-indicator:hover {
  border-color: var(--color-primary);
  color: var(--color-primary);
}
.scroll-indicator svg {
  width: 20px;
  height: 20px;
}

/* ========== Section Common ========== */
.section {
  padding: var(--space-section) 0;
}
.section-head {
  text-align: center;
  margin-bottom: 48px;
}
.section-title {
  font-size: 34px;
  font-weight: 700;
  color: var(--color-text);
  letter-spacing: -0.01em;
  line-height: 1.3;
  position: relative;
  display: inline-block;
  margin-bottom: 16px;
}
.section-title::after {
  content: "";
  position: absolute;
  bottom: -12px;
  left: 50%;
  transform: translateX(-50%);
  width: 48px;
  height: 3px;
  border-radius: 2px;
  background: var(--color-accent);
}
.section-subtitle {
  font-size: 16px;
  color: var(--color-text-sub);
  max-width: 680px;
  margin: 20px auto 0;
  line-height: 1.8;
}

/* ========== Stats Bar ========== */
.stats-section {
  padding: 48px 0;
  background: #fff;
  border-top: 1px solid var(--color-line);
  border-bottom: 1px solid var(--color-line);
}
.stats-bar {
  display: flex;
  align-items: center;
  justify-content: center;
  background-image: linear-gradient(rgba(15, 55, 90, 0.035) 1px, transparent 1px), linear-gradient(90deg, rgba(15, 55, 90, 0.035) 1px, transparent 1px);
  background-size: 24px 24px;
  border-radius: var(--radius-card);
  padding: 40px 32px;
}
.stat-item {
  flex: 1;
  text-align: center;
  padding: 16px 8px;
  position: relative;
}
.stat-item:not(:last-child)::after {
  content: "";
  position: absolute;
  right: 0;
  top: 50%;
  transform: translateY(-50%);
  width: 1px;
  height: 48px;
  background: var(--color-line);
}
.stat-num {
  font-size: 44px;
  font-weight: 700;
  color: var(--color-primary);
  line-height: 1.2;
  letter-spacing: -0.01em;
}
.stat-label {
  font-size: 14px;
  color: var(--color-text-sub);
  margin-top: 8px;
}

/* ========== Data Grid ========== */
.data-section {
  background: var(--color-bg);
}
.data-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
}
.data-card {
  background: var(--color-surface);
  border-radius: var(--radius-card);
  box-shadow: var(--shadow-card);
  overflow: hidden;
  transition: transform 0.2s var(--transition), box-shadow 0.2s var(--transition);
  display: flex;
  flex-direction: column;
}
.data-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-hover);
}
.data-card-img {
  width: 100%;
  height: 190px;
  object-fit: cover;
  background: var(--color-primary-soft);
}
.data-card-body {
  padding: 24px 24px 28px;
  display: flex;
  flex-direction: column;
  flex: 1;
}
.card-tag {
  display: inline-block;
  align-self: flex-start;
  background: var(--color-primary-soft);
  color: var(--color-primary);
  font-size: 12px;
  font-weight: 600;
  padding: 4px 14px;
  border-radius: 999px;
  margin-bottom: 14px;
  letter-spacing: 0.02em;
}
.data-card h3 {
  font-size: 19px;
  font-weight: 600;
  color: var(--color-text);
  line-height: 1.4;
  margin-bottom: 10px;
  letter-spacing: -0.01em;
}
.data-card p {
  font-size: 14px;
  color: var(--color-text-sub);
  line-height: 1.7;
  flex: 1;
}
.card-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  margin-top: 16px;
  font-size: 14px;
  font-weight: 600;
  color: var(--color-primary);
  transition: gap 0.2s ease;
}
.card-link:hover {
  gap: 10px;
}
.card-link svg {
  width: 16px;
  height: 16px;
  transition: transform 0.2s ease;
}
.seo-note {
  margin-top: 48px;
  background: var(--color-primary-soft);
  border-radius: var(--radius-card);
  padding: 28px 36px;
  font-size: 15px;
  color: #2C4A5A;
  line-height: 1.8;
  text-align: center;
}

/* ========== Scenarios ========== */
.scenarios-section {
  background: #fff;
}
.scenario-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}
.scenario-card {
  background: var(--color-bg);
  border-radius: var(--radius-card);
  padding: 32px 24px;
  text-align: center;
  transition: transform 0.2s var(--transition), box-shadow 0.2s var(--transition);
}
.scenario-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-hover);
}
.scenario-icon {
  width: 64px;
  height: 64px;
  margin: 0 auto 20px;
  background: var(--color-surface);
  border-radius: 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-primary);
  box-shadow: var(--shadow-card);
}
.scenario-icon svg {
  width: 28px;
  height: 28px;
}
.scenario-card h3 {
  font-size: 17px;
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: 10px;
}
.scenario-card p {
  font-size: 14px;
  color: var(--color-text-sub);
  line-height: 1.7;
}

/* ========== Process ========== */
.process-section {
  background: var(--color-bg);
}
.process-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 32px;
  counter-reset: process;
}
.process-step {
  position: relative;
  background: var(--color-surface);
  border-radius: var(--radius-card);
  padding: 36px 24px 32px;
  box-shadow: var(--shadow-card);
  text-align: left;
}
.process-step::before {
  counter-increment: process;
  content: "0" counter(process);
  font-size: 15px;
  font-weight: 700;
  color: var(--color-accent);
  letter-spacing: 0.04em;
  display: block;
  margin-bottom: 12px;
}
.step-num {
  width: 36px;
  height: 36px;
  background: var(--color-primary-soft);
  color: var(--color-primary);
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 15px;
  margin-bottom: 16px;
}
.process-step h3 {
  font-size: 18px;
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: 10px;
  letter-spacing: -0.01em;
}
.process-step p {
  font-size: 14px;
  color: var(--color-text-sub);
  line-height: 1.7;
}

/* ========== FAQ ========== */
.faq-section {
  background: #fff;
}
.faq-list {
  max-width: 860px;
  margin: 0 auto;
  background: var(--color-surface);
  border-radius: var(--radius-card);
  box-shadow: var(--shadow-card);
  overflow: hidden;
}
.faq-item {
  border-bottom: 1px solid #EDF3F8;
}
.faq-item:last-child {
  border-bottom: none;
}
.faq-question {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 0 28px;
  min-height: 60px;
  font-size: 16px;
  font-weight: 600;
  color: var(--color-text);
  text-align: left;
  transition: background 0.2s ease, color 0.2s ease;
}
.faq-question:hover {
  background: #F8FBFD;
  color: var(--color-primary);
}
.faq-icon {
  width: 28px;
  height: 28px;
  border-radius: 50%;
  border: 1.5px solid var(--color-line);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
  font-weight: 400;
  color: var(--color-text-sub);
  flex-shrink: 0;
  transition: transform 0.3s var(--transition), background 0.2s ease, color 0.2s ease;
  line-height: 1;
}
.faq-item.active .faq-icon {
  transform: rotate(45deg);
  background: var(--color-primary);
  border-color: var(--color-primary);
  color: #fff;
}
.faq-answer {
  max-height: 0;
  overflow: hidden;
  padding: 0 28px;
  font-size: 15px;
  color: var(--color-text-sub);
  line-height: 1.8;
  transition: max-height 0.3s var(--transition), padding 0.3s var(--transition);
}
.faq-item.active .faq-answer {
  max-height: 320px;
  padding: 0 28px 24px;
}

/* ========== CTA ========== */
.cta-section {
  padding: 80px 0;
}
.cta-banner {
  background: var(--color-primary-dark);
  background-image: linear-gradient(135deg, rgba(26, 110, 138, 0.35) 0%, rgba(15, 59, 87, 0.9) 100%);
  border-radius: 24px;
  padding: 64px 48px;
  text-align: center;
  color: #fff;
  position: relative;
  overflow: hidden;
}
.cta-banner::before {
  content: "";
  position: absolute;
  top: 0;
  right: 0;
  width: 260px;
  height: 260px;
  background: rgba(201, 162, 39, 0.08);
  border-radius: 50%;
  pointer-events: none;
}
.cta-title {
  font-size: 30px;
  font-weight: 700;
  margin-bottom: 12px;
  letter-spacing: -0.01em;
  position: relative;
  z-index: 1;
}
.cta-subtitle {
  font-size: 16px;
  opacity: 0.85;
  margin-bottom: 32px;
  position: relative;
  z-index: 1;
}
.cta-actions {
  position: relative;
  z-index: 1;
}

/* ========== Footer ========== */
.site-footer {
  background: var(--color-primary-dark);
  background-image: linear-gradient(rgba(255, 255, 255, 0.025) 1px, transparent 1px), linear-gradient(90deg, rgba(255, 255, 255, 0.025) 1px, transparent 1px);
  background-size: 32px 32px;
  color: rgba(255, 255, 255, 0.75);
  padding: 72px 0 0;
}
.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 48px;
  padding-bottom: 56px;
}
.footer-brand .logo {
  color: #fff;
  font-size: 26px;
  margin-bottom: 14px;
  display: block;
}
.footer-brand p {
  font-size: 14px;
  line-height: 1.8;
  color: rgba(255, 255, 255, 0.65);
  margin-bottom: 20px;
  max-width: 320px;
}
.footer-socials {
  display: flex;
  gap: 12px;
}
.footer-socials a {
  width: 40px;
  height: 40px;
  border: 1px solid rgba(255, 255, 255, 0.3);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 13px;
  color: rgba(255, 255, 255, 0.8);
  transition: all 0.2s ease;
}
.footer-socials a:hover {
  background: var(--color-primary);
  border-color: var(--color-primary);
  color: #fff;
  transform: translateY(-2px);
}
.footer-col h4 {
  font-size: 15px;
  font-weight: 600;
  color: #fff;
  margin-bottom: 18px;
  letter-spacing: 0.02em;
}
.footer-col a {
  display: block;
  font-size: 14px;
  color: rgba(255, 255, 255, 0.6);
  line-height: 2.4;
  transition: color 0.2s ease, padding-left 0.2s ease;
}
.footer-col a:hover {
  color: #fff;
  padding-left: 4px;
}
.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  padding: 24px 0;
  text-align: center;
  font-size: 13px;
  color: rgba(255, 255, 255, 0.45);
}

/* ========== Responsive ========== */
@media (max-width: 1023px) {
  :root {
    --space-section: 72px;
  }
  .data-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .scenario-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .process-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .footer-grid {
    grid-template-columns: 1fr 1fr;
  }
  .main-nav {
    gap: 20px;
  }
  .main-nav a {
    font-size: 14px;
  }
}
@media (max-width: 767px) {
  :root {
    --space-section: 56px;
  }
  .container {
    padding-left: 16px;
    padding-right: 16px;
  }
  .site-header {
    height: 60px;
  }
  .header-inner {
    height: 60px;
  }
  .main-nav {
    position: fixed;
    top: 0;
    right: 0;
    width: 100%;
    height: 100vh;
    background: rgba(255, 255, 255, 0.98);
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 0;
    z-index: 90;
    transform: translateX(100%);
    transition: transform 0.4s var(--transition);
    padding: 80px 24px 40px;
  }
  .main-nav.nav-open {
    transform: translateX(0);
  }
  .main-nav a {
    font-size: 22px;
    line-height: 48px;
    padding: 8px 0;
    border-bottom: 1px solid #EDF3F8;
    width: 100%;
    text-align: center;
  }
  .main-nav a.active::after {
    display: none;
  }
  .nav-toggle {
    display: flex;
  }
  .header-actions .btn-primary {
    display: none;
  }
  .page-hero {
    padding: 100px 0 64px;
    min-height: 360px;
  }
  .page-hero h1 {
    font-size: 32px;
  }
  .hero-subtitle {
    font-size: 15px;
  }
  .hero-actions .btn {
    width: 100%;
  }
  .hero-actions {
    flex-direction: column;
    gap: 12px;
  }
  .stats-bar {
    flex-direction: column;
    gap: 24px;
    padding: 32px 24px;
  }
  .stat-item:not(:last-child)::after {
    display: none;
  }
  .stat-item {
    padding: 12px 0;
  }
  .stat-num {
    font-size: 34px;
  }
  .data-grid {
    grid-template-columns: 1fr;
    gap: 20px;
  }
  .scenario-grid,
  .process-grid {
    grid-template-columns: 1fr;
    gap: 16px;
  }
  .section-title {
    font-size: 26px;
  }
  .seo-note {
    padding: 20px;
    font-size: 14px;
    text-align: left;
  }
  .faq-question {
    padding: 0 18px;
    font-size: 15px;
  }
  .faq-answer {
    padding: 0 18px;
  }
  .faq-item.active .faq-answer {
    padding: 0 18px 20px;
  }
  .cta-banner {
    padding: 48px 24px;
    border-radius: 16px;
  }
  .cta-title {
    font-size: 24px;
  }
  .cta-actions .btn {
    width: 100%;
  }
  .footer-grid {
    grid-template-columns: 1fr;
    gap: 32px;
  }
  .search-drop {
    position: fixed;
    top: 60px;
    left: 16px;
    right: 16px;
    width: auto;
  }
  .search-drop input {
    width: 100%;
  }
}
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
  }
  html {
    scroll-behavior: auto;
  }
}