/* roulang page: index */
/* ===== 设计变量 ===== */
:root {
  --primary: #2B6CB0;
  --primary-light: #EBF4FF;
  --primary-dark: #1A4A7A;
  --secondary: #2FB5A4;
  --secondary-light: #E6F7F5;
  --accent: #E08A00;
  --accent-dark: #C97B00;
  --accent-active: #B06D00;
  --bg-warm: #F7F7F5;
  --surface: #FFFFFF;
  --text-primary: #1F2937;
  --text-secondary: #4B5563;
  --text-muted: #9CA3AF;
  --border: #E5E7EB;
  --footer-bg: #102A43;
  --footer-text: #B0C4D9;
  --radius-lg: 10px;
  --radius-sm: 6px;
  --radius-pill: 999px;
  --shadow: 0 1px 2px rgba(16,24,40,0.04), 0 4px 16px rgba(16,24,40,0.06);
  --shadow-hover: 0 2px 4px rgba(16,24,40,0.05), 0 12px 24px rgba(16,24,40,0.08);
  --transition: all 0.25s ease;
}

/* ===== 基础 Reset ===== */
*, *::before, *::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}
html {
  scroll-behavior: smooth;
}
body {
  font-family: -apple-system, "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
  font-size: 16px;
  line-height: 1.75;
  background: var(--bg-warm);
  color: var(--text-primary);
  -webkit-font-smoothing: antialiased;
  letter-spacing: 0.01em;
}
a {
  color: var(--primary);
  text-decoration: none;
  transition: var(--transition);
}
a:hover {
  color: var(--primary-dark);
  text-decoration: none;
}
img {
  max-width: 100%;
  display: block;
}
button {
  font-family: inherit;
}
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding-left: 24px;
  padding-right: 24px;
}
.section {
  padding: 88px 0;
}
.section-divider {
  border: 0;
  border-top: 1px solid var(--border);
  margin: 0;
}
.text-muted {
  color: var(--text-muted);
}

/* ===== 布局工具 ===== */
.section-head {
  text-align: center;
  max-width: 760px;
  margin: 0 auto 56px;
}
.section-head h2 {
  font-size: 28px;
  font-weight: 700;
  line-height: 1.3;
  color: var(--text-primary);
  margin-bottom: 16px;
}
.section-head p {
  font-size: 16px;
  color: var(--text-secondary);
}
.section-head .head-badge {
  display: inline-block;
  padding: 4px 14px;
  border-radius: var(--radius-pill);
  background: var(--primary-light);
  color: var(--primary);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.04em;
  margin-bottom: 12px;
}

/* ===== 按钮体系 ===== */
.btn-main {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  height: 48px;
  min-width: 160px;
  padding: 0 24px;
  border-radius: var(--radius-sm);
  font-size: 15px;
  font-weight: 600;
  border: none;
  background: var(--accent);
  color: #fff;
  cursor: pointer;
  transition: var(--transition);
  box-shadow: 0 2px 8px rgba(224,138,0,0.25);
}
.btn-main:hover {
  background: var(--accent-dark);
  color: #fff;
  transform: translateY(-1px);
  box-shadow: 0 4px 12px rgba(224,138,0,0.3);
}
.btn-main:active {
  background: var(--accent-active);
  transform: translateY(0);
}
.btn-outline {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  height: 44px;
  min-width: 160px;
  padding: 0 24px;
  border-radius: var(--radius-sm);
  font-size: 15px;
  font-weight: 600;
  border: 1.5px solid var(--primary);
  background: transparent;
  color: var(--primary);
  cursor: pointer;
  transition: var(--transition);
}
.btn-outline:hover {
  background: var(--primary-light);
  color: var(--primary-dark);
  transform: translateY(-1px);
}
.btn-outline:active {
  background: var(--primary-light);
  transform: translateY(0);
}
.btn-link-arrow {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  color: var(--primary);
  font-weight: 600;
  font-size: 15px;
}
.btn-link-arrow i {
  transition: transform 0.25s ease;
}
.btn-link-arrow:hover i {
  transform: translateX(4px);
}

/* ===== 导航 ===== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: rgba(247,247,245,0.85);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid rgba(229,231,235,0.6);
  transition: var(--transition);
}
.site-header.scrolled {
  background: rgba(255,255,255,0.94);
  box-shadow: 0 4px 20px rgba(16,24,40,0.05);
}
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 68px;
  gap: 16px;
}

/* Logo */
.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
}
.brand-badge {
  width: 38px;
  height: 38px;
  background: var(--primary);
  color: #fff;
  font-size: 17px;
  font-weight: 800;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 8px;
  transform: rotate(-4deg);
  border: 2px solid #fff;
  box-shadow: 0 0 0 2px var(--primary), 0 2px 6px rgba(43,108,176,0.2);
  letter-spacing: -0.5px;
}
.brand-text {
  font-size: 20px;
  font-weight: 800;
  color: var(--text-primary);
  letter-spacing: 0.01em;
  white-space: nowrap;
}

/* 分段chip导航 */
.nav-seg {
  display: flex;
  background: var(--primary-light);
  border-radius: var(--radius-pill);
  padding: 4px;
  gap: 2px;
}
.nav-chip {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 8px 18px;
  border-radius: var(--radius-pill);
  font-size: 14px;
  font-weight: 500;
  color: var(--text-secondary);
  background: transparent;
  border: none;
  cursor: pointer;
  transition: var(--transition);
  white-space: nowrap;
}
.nav-chip:hover {
  color: var(--primary);
  background: rgba(255,255,255,0.5);
}
.nav-chip.active {
  background: var(--primary);
  color: #fff;
  box-shadow: 0 2px 8px rgba(43,108,176,0.25);
  font-weight: 600;
}
.nav-cta {
  height: 40px;
  min-width: 110px;
  padding: 0 20px;
  font-size: 14px;
  flex-shrink: 0;
}
.nav-toggle {
  display: none;
  width: 42px;
  height: 42px;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  background: var(--surface);
  color: var(--text-primary);
  font-size: 18px;
  cursor: pointer;
  align-items: center;
  justify-content: center;
  transition: var(--transition);
}
.nav-toggle:hover {
  border-color: var(--primary);
  color: var(--primary);
}

/* 移动端抽屉 */
.mobile-nav {
  position: fixed;
  top: 68px;
  right: 0;
  width: 280px;
  height: calc(100vh - 68px);
  background: var(--surface);
  border-left: 1px solid var(--border);
  box-shadow: -8px 0 24px rgba(16,24,40,0.08);
  padding: 24px;
  z-index: 999;
  transform: translateX(100%);
  transition: transform 0.3s ease;
  display: flex;
  flex-direction: column;
  gap: 12px;
}
.mobile-nav.open {
  transform: translateX(0);
}
.mobile-nav a {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 14px 16px;
  border-radius: var(--radius-sm);
  font-size: 15px;
  font-weight: 600;
  color: var(--text-secondary);
  background: transparent;
  border: none;
  min-height: 48px;
}
.mobile-nav a.active {
  background: var(--primary);
  color: #fff;
}
.mobile-overlay {
  position: fixed;
  inset: 0;
  background: rgba(16,24,40,0.4);
  z-index: 998;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.3s ease;
}
.mobile-overlay.open {
  opacity: 1;
  pointer-events: auto;
}

/* ===== Hero ===== */
.hero {
  position: relative;
  padding: 96px 0 88px;
  background-image: url('/assets/images/backpic/back-1.png');
  background-size: cover;
  background-position: center;
  background-repeat: no-repeat;
}
.hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(90deg, #ffffff 0%, rgba(255,255,255,0.92) 40%, rgba(255,255,255,0.55) 70%, rgba(255,255,255,0.3) 100%);
  pointer-events: none;
}
.hero .container {
  position: relative;
  z-index: 2;
}
.hero-grid {
  display: grid;
  grid-template-columns: 54% 46%;
  gap: 56px;
  align-items: center;
}
.hero-copy .hero-stamp {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 16px;
  border-radius: var(--radius-pill);
  background: var(--secondary-light);
  color: #138F80;
  font-size: 13px;
  font-weight: 600;
  margin-bottom: 20px;
  border: 1px dashed var(--secondary);
}
.hero-copy h1 {
  font-size: 40px;
  font-weight: 800;
  line-height: 1.25;
  color: var(--text-primary);
  margin-bottom: 24px;
}
.hero-copy .hero-sub {
  font-size: 16px;
  line-height: 1.8;
  color: var(--text-secondary);
  max-width: 480px;
  margin-bottom: 32px;
}
.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  align-items: center;
}
.hero-visual {
  position: relative;
}
.hero-visual .hero-card {
  background: var(--surface);
  border-radius: var(--radius-lg);
  border: 1px solid var(--border);
  box-shadow: var(--shadow);
  padding: 12px;
  transform: rotate(1deg);
  transition: var(--transition);
}
.hero-visual .hero-card:hover {
  transform: rotate(0deg) translateY(-4px);
  box-shadow: var(--shadow-hover);
}
.hero-visual .hero-card img {
  width: 100%;
  border-radius: 8px;
  object-fit: cover;
  aspect-ratio: 4/3;
}
.hero-card-caption {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 6px 4px;
}
.hero-card-caption .cap-left {
  font-size: 13px;
  font-weight: 600;
  color: var(--text-primary);
}
.hero-card-caption .cap-right {
  font-size: 12px;
  color: var(--text-muted);
  font-family: "JetBrains Mono", "SFMono-Regular", Consolas, monospace;
}

/* ===== 痛点区 ===== */
.pain-section {
  background: var(--surface);
}
.pain-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.pain-card {
  background: var(--bg-warm);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 32px 24px;
  text-align: center;
  transition: var(--transition);
  position: relative;
}
.pain-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-hover);
  border-color: #D1D9E2;
}
.pain-icon {
  width: 56px;
  height: 56px;
  margin: 0 auto 20px;
  border-radius: 14px;
  background: var(--primary-light);
  color: var(--primary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 24px;
}
.pain-card h3 {
  font-size: 17px;
  font-weight: 700;
  margin-bottom: 10px;
  color: var(--text-primary);
}
.pain-card p {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.7;
  margin-bottom: 0;
}

/* ===== 解决方案区 ===== */
.solution-section {
  background: var(--bg-warm);
}
.solution-grid {
  display: grid;
  grid-template-columns: 1fr 360px;
  gap: 48px;
  align-items: start;
}
.solution-left {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow);
  padding: 28px;
}
.solution-left .list-title {
  font-size: 18px;
  font-weight: 700;
  margin-bottom: 20px;
  color: var(--text-primary);
  display: flex;
  align-items: center;
  gap: 10px;
}
.solution-left .list-title i {
  color: var(--secondary);
}
.entry-list {
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.entry-row {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 14px 16px;
  border-radius: var(--radius-sm);
  border: 1px solid transparent;
  transition: var(--transition);
  cursor: pointer;
}
.entry-row:hover {
  background: var(--primary-light);
  border-color: #D6E6F7;
}
.entry-status {
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--secondary);
  flex-shrink: 0;
  position: relative;
}
.entry-status::after {
  content: '';
  position: absolute;
  inset: -4px;
  border-radius: 50%;
  background: rgba(47,181,164,0.2);
}
.entry-code {
  font-family: "JetBrains Mono", "SFMono-Regular", Consolas, monospace;
  font-size: 15px;
  font-weight: 600;
  color: var(--text-primary);
  flex-shrink: 0;
}
.entry-name {
  font-size: 14px;
  color: var(--text-muted);
  flex: 1;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.btn-copy {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 14px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
  background: var(--surface);
  font-size: 13px;
  font-weight: 500;
  color: var(--text-secondary);
  cursor: pointer;
  transition: var(--transition);
  flex-shrink: 0;
}
.btn-copy:hover {
  border-color: var(--primary);
  color: var(--primary);
  background: var(--primary-light);
}
.btn-copy.copied {
  border-color: var(--secondary);
  color: #138F80;
  background: var(--secondary-light);
}
.solution-more {
  margin-top: 20px;
  display: flex;
  justify-content: center;
}
.solution-right {
  position: sticky;
  top: 88px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow);
  padding: 32px 28px;
}
.solution-right .side-badge {
  display: inline-block;
  padding: 4px 12px;
  border-radius: var(--radius-pill);
  background: var(--secondary-light);
  color: #138F80;
  font-size: 12px;
  font-weight: 600;
  margin-bottom: 16px;
}
.solution-right h3 {
  font-size: 20px;
  font-weight: 700;
  margin-bottom: 16px;
}
.solution-right p {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.8;
  margin-bottom: 16px;
}
.solution-right ul {
  list-style: none;
  padding: 0;
  margin: 0 0 20px;
}
.solution-right ul li {
  position: relative;
  padding-left: 22px;
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.7;
  margin-bottom: 10px;
}
.solution-right ul li::before {
  content: '✓';
  position: absolute;
  left: 0;
  color: var(--secondary);
  font-weight: 700;
}

/* ===== 数据区 ===== */
.stats-section {
  background: var(--surface);
}
.stats-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
  max-width: 880px;
  margin: 0 auto;
}
.stats-card {
  background: var(--bg-warm);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 36px 32px;
  text-align: center;
  transition: var(--transition);
}
.stats-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-hover);
}
.stats-num {
  font-family: "JetBrains Mono", "SFMono-Regular", Consolas, monospace;
  font-size: 42px;
  font-weight: 700;
  color: var(--text-primary);
  line-height: 1.2;
  font-variant-numeric: tabular-nums;
  margin-bottom: 8px;
}
.stats-num small {
  font-size: 20px;
  color: var(--text-muted);
  font-weight: 400;
}
.stats-label {
  font-size: 14px;
  color: var(--text-secondary);
}

/* ===== 资讯区 ===== */
.news-section {
  background: var(--bg-warm);
}
.news-section .section-head {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  max-width: 100%;
  margin-bottom: 40px;
  gap: 24px;
}
.news-section .section-head .head-left {
  text-align: left;
}
.news-section .section-head h2 {
  margin-bottom: 8px;
}
.news-section .section-head p {
  margin-bottom: 0;
}
.news-list {
  display: flex;
  flex-direction: column;
  gap: 16px;
}
.news-card {
  display: block;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow);
  padding: 28px 32px;
  transition: var(--transition);
  position: relative;
}
.news-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-hover);
  border-color: #C9D7E8;
}
.news-card-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 10px;
}
.news-chip {
  display: inline-block;
  padding: 3px 12px;
  border-radius: var(--radius-pill);
  background: rgba(43,108,176,0.1);
  color: var(--primary);
  font-size: 13px;
  font-weight: 600;
}
.news-date {
  font-size: 12px;
  color: var(--text-muted);
  font-family: "JetBrains Mono", "SFMono-Regular", Consolas, monospace;
}
.news-card h3 {
  font-size: 17px;
  font-weight: 600;
  color: var(--primary);
  margin-bottom: 8px;
  line-height: 1.5;
}
.news-card h3:hover {
  text-decoration: underline;
  text-underline-offset: 3px;
}
.news-excerpt {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.7;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  margin-bottom: 0;
}
.news-empty {
  text-align: center;
  padding: 56px 24px;
  background: var(--surface);
  border: 1px dashed var(--border);
  border-radius: var(--radius-lg);
  color: var(--text-muted);
  font-size: 14px;
}
.news-empty .empty-icon {
  display: block;
  font-size: 40px;
  margin-bottom: 12px;
  opacity: 0.5;
}

/* ===== 证言区 ===== */
.testimonial-section {
  background: var(--surface);
}
.testimonial-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
}
.testimonial-card {
  background: var(--bg-warm);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 28px;
  transition: var(--transition);
  position: relative;
}
.testimonial-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-hover);
}
.testimonial-stars {
  color: var(--accent);
  font-size: 14px;
  margin-bottom: 14px;
  letter-spacing: 2px;
}
.testimonial-card blockquote {
  font-size: 15px;
  line-height: 1.8;
  color: var(--text-primary);
  margin: 0 0 20px;
  padding: 0;
  border: none;
}
.testimonial-person {
  display: flex;
  align-items: center;
  gap: 12px;
}
.testimonial-avatar {
  width: 42px;
  height: 42px;
  border-radius: 50%;
  background: var(--primary-light);
  color: var(--primary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 15px;
}
.testimonial-name {
  font-size: 14px;
  font-weight: 600;
  color: var(--text-primary);
}
.testimonial-tag {
  font-size: 12px;
  color: var(--text-muted);
}

/* ===== FAQ ===== */
.faq-section {
  background: var(--bg-warm);
}
.accordion {
  max-width: 800px;
  margin: 0 auto;
}
.accordion-item {
  background: transparent;
  border: none;
  border-bottom: 1px solid var(--border);
}
.accordion-button {
  background: transparent;
  color: var(--text-primary);
  font-size: 16px;
  font-weight: 600;
  padding: 24px 12px;
  border: none;
  box-shadow: none;
  display: flex;
  align-items: center;
  gap: 14px;
  transition: var(--transition);
  position: relative;
}
.accordion-button::after {
  content: '';
  width: 18px;
  height: 18px;
  background-image: none;
  border: 2px solid var(--primary);
  border-radius: 50%;
  position: absolute;
  right: 16px;
  top: 50%;
  transform: translateY(-50%);
  transition: var(--transition);
}
.accordion-button:not(.collapsed)::after {
  border-color: var(--primary);
  background: var(--primary);
}
.accordion-button:not(.collapsed) {
  background: transparent;
  color: var(--primary);
  box-shadow: none;
}
.accordion-button:focus {
  box-shadow: none;
  outline: none;
}
.accordion-icon {
  width: 22px;
  height: 22px;
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  background: var(--primary-light);
  color: var(--primary);
  font-size: 14px;
  font-weight: 700;
  transition: transform 0.25s ease;
}
.accordion-button:not(.collapsed) .accordion-icon {
  transform: rotate(45deg);
  background: var(--primary);
  color: #fff;
}
.accordion-body {
  padding: 8px 12px 28px;
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.85;
}
.accordion-body p {
  margin-bottom: 10px;
}
.accordion-body p:last-child {
  margin-bottom: 0;
}

/* ===== CTA ===== */
.cta-section {
  background: var(--primary);
  color: #fff;
  padding: 72px 0;
  text-align: center;
}
.cta-section h2 {
  font-size: 28px;
  font-weight: 700;
  color: #fff;
  margin-bottom: 12px;
}
.cta-section p {
  font-size: 15px;
  color: rgba(255,255,255,0.85);
  margin-bottom: 32px;
  max-width: 560px;
  margin-left: auto;
  margin-right: auto;
}
.cta-section .btn-main {
  background: #fff;
  color: var(--primary);
  box-shadow: 0 4px 16px rgba(0,0,0,0.15);
  min-width: 200px;
}
.cta-section .btn-main:hover {
  background: var(--primary-light);
  color: var(--primary-dark);
}

/* ===== 页脚 ===== */
.site-footer {
  background: var(--footer-bg);
  color: var(--footer-text);
  padding: 64px 0 0;
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.2fr 1fr 1fr;
  gap: 48px;
  padding-bottom: 48px;
}
.footer-brand {
  margin-bottom: 16px;
  display: flex;
  align-items: center;
  gap: 10px;
}
.footer-brand .brand-badge {
  width: 34px;
  height: 34px;
  font-size: 14px;
  border-width: 1.5px;
}
.footer-brand-text {
  font-size: 18px;
  font-weight: 700;
  color: #fff;
}
.footer-desc {
  font-size: 13px;
  line-height: 1.8;
  color: var(--footer-text);
  margin-bottom: 0;
}
.footer-title {
  font-size: 15px;
  font-weight: 600;
  color: #fff;
  margin-bottom: 20px;
}
.footer-links {
  list-style: none;
  padding: 0;
  margin: 0;
}
.footer-links li {
  margin-bottom: 12px;
}
.footer-links a {
  color: var(--footer-text);
  font-size: 14px;
  transition: var(--transition);
}
.footer-links a:hover {
  color: #66A3FF;
  padding-left: 4px;
}
.footer-disclaim {
  font-size: 13px;
  line-height: 1.8;
  color: var(--footer-text);
  margin-bottom: 0;
}
.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.1);
  padding: 20px 0;
  text-align: center;
}
.footer-bottom p {
  font-size: 13px;
  color: rgba(176,196,217,0.7);
  margin-bottom: 0;
}

/* ===== 响应式 ===== */
@media (max-width: 991px) {
  .hero-grid {
    grid-template-columns: 1fr;
    gap: 40px;
  }
  .hero {
    padding: 64px 0;
  }
  .hero-copy h1 {
    font-size: 34px;
  }
  .pillars-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .solution-grid {
    grid-template-columns: 1fr;
  }
  .solution-right {
    position: static;
  }
  .nav-seg {
    display: none;
  }
  .nav-toggle {
    display: flex;
  }
  .nav-cta {
    display: none;
  }
  .footer-grid {
    grid-template-columns: 1fr 1fr;
  }
  .stats-grid {
    max-width: 100%;
  }
}

@media (max-width: 767px) {
  .section {
    padding: 48px 0;
  }
  .section-head {
    margin-bottom: 36px;
  }
  .section-head h2 {
    font-size: 22px;
  }
  .hero {
    padding: 48px 0 40px;
  }
  .hero-copy h1 {
    font-size: 28px;
  }
  .hero-card-caption .cap-right {
    display: none;
  }
  .pain-grid {
    grid-template-columns: 1fr;
    gap: 16px;
  }
  .stats-grid {
    grid-template-columns: 1fr;
    gap: 16px;
  }
  .stats-card {
    padding: 24px;
  }
  .stats-num {
    font-size: 32px;
  }
  .testimonial-grid {
    grid-template-columns: 1fr;
    gap: 16px;
  }
  .footer-grid {
    grid-template-columns: 1fr;
    gap: 32px;
  }
  .news-section .section-head {
    flex-direction: column;
    align-items: flex-start;
  }
  .news-card {
    padding: 20px;
  }
  .entry-row {
    flex-wrap: wrap;
    gap: 10px;
  }
  .btn-copy {
    margin-left: auto;
  }
  .entry-name {
    width: 100%;
    order: 3;
  }
  .hero-actions {
    flex-direction: column;
    align-items: stretch;
  }
  .hero-actions .btn-main,
  .hero-actions .btn-outline {
    width: 100%;
  }
  .cta-section {
    padding: 48px 0;
  }
  .cta-section h2 {
    font-size: 22px;
  }
  .accordion-button {
    font-size: 15px;
    padding-right: 40px;
  }
  .accordion-button::after {
    right: 8px;
  }
}

@media (max-width: 520px) {
  .container {
    padding-left: 16px;
    padding-right: 16px;
  }
  .brand-text {
    font-size: 17px;
  }
  .brand-badge {
    width: 32px;
    height: 32px;
    font-size: 14px;
  }
  .header-inner {
    height: 60px;
  }
  .mobile-nav {
    top: 60px;
    height: calc(100vh - 60px);
  }
}

/* 复古手作风点缀 */
.pain-card::before,
.stats-card::before {
  content: '';
  position: absolute;
  top: -1px;
  right: -1px;
  width: 24px;
  height: 24px;
  border-top: 3px solid var(--secondary);
  border-right: 3px solid var(--secondary);
  border-radius: 0 10px 0 0;
  opacity: 0.4;
}
.pain-card::after,
.stats-card::after {
  content: '';
  position: absolute;
  bottom: -1px;
  left: -1px;
  width: 24px;
  height: 24px;
  border-bottom: 3px solid var(--secondary);
  border-left: 3px solid var(--secondary);
  border-radius: 0 0 0 10px;
  opacity: 0.4;
}

/* roulang page: article */
:root {
            --primary: #2B6CB0;
            --primary-light: #EBF4FF;
            --primary-dark: #1A4D82;
            --secondary: #2FB5A4;
            --accent: #E08A00;
            --accent-hover: #C97B00;
            --accent-active: #B06D00;
            --bg-warm: #F7F7F5;
            --surface: #FFFFFF;
            --text-primary: #1F2937;
            --text-secondary: #4B5563;
            --text-muted: #9CA3AF;
            --border: #E5E7EB;
            --footer-bg: #102A43;
            --footer-text: #B0C4D9;
            --radius-lg: 10px;
            --radius-md: 6px;
            --radius-pill: 999px;
            --shadow-card: 0 1px 2px rgba(16, 24, 40, 0.04), 0 4px 16px rgba(16, 24, 40, 0.06);
            --shadow-card-hover: 0 2px 4px rgba(16, 24, 40, 0.05), 0 12px 24px rgba(16, 24, 40, 0.08);
            --transition-base: all 0.25s ease;
        }

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

        html {
            scroll-behavior: smooth;
        }

        body {
            margin: 0;
            font-family: -apple-system, "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
            font-size: 16px;
            line-height: 1.75;
            color: var(--text-primary);
            background: var(--bg-warm);
            -webkit-font-smoothing: antialiased;
        }

        a {
            color: var(--primary);
            text-decoration: none;
            transition: color 0.2s ease;
        }

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

        img {
            max-width: 100%;
            height: auto;
        }

        button,
        input {
            font-family: inherit;
        }

        .container {
            max-width: 1200px;
            padding-left: 40px;
            padding-right: 40px;
        }

        @media (max-width: 767px) {
            .container {
                padding-left: 24px;
                padding-right: 24px;
            }
        }

        /* ===== 按钮 ===== */
        .btn-main {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            background: var(--accent);
            color: #fff;
            border: none;
            border-radius: var(--radius-md);
            height: 48px;
            min-width: 160px;
            padding: 0 24px;
            font-size: 15px;
            font-weight: 600;
            cursor: pointer;
            transition: var(--transition-base);
            text-decoration: none;
        }

        .btn-main:hover {
            background: var(--accent-hover);
            color: #fff;
            transform: translateY(-1px);
            box-shadow: 0 8px 20px rgba(224, 138, 0, 0.25);
            text-decoration: none;
        }

        .btn-main:active {
            background: var(--accent-active);
            transform: translateY(0);
            box-shadow: none;
        }

        .btn-outline {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            background: transparent;
            color: var(--primary);
            border: 1.5px solid var(--primary);
            border-radius: var(--radius-md);
            height: 44px;
            padding: 0 22px;
            font-size: 14px;
            font-weight: 600;
            cursor: pointer;
            transition: var(--transition-base);
            text-decoration: none;
        }

        .btn-outline:hover {
            background: var(--primary-light);
            color: var(--primary-dark);
            transform: translateY(-1px);
            text-decoration: none;
        }

        .btn-outline:active {
            transform: translateY(0);
        }

        /* ===== Header / 导航 ===== */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 1000;
            background: transparent;
            transition: background 0.3s ease, box-shadow 0.3s ease, border-color 0.3s ease;
            border-bottom: 1px solid transparent;
        }

        .site-header.scrolled {
            background: rgba(255, 255, 255, 0.92);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border-bottom: 1px solid var(--border);
            box-shadow: 0 2px 10px rgba(16, 24, 40, 0.04);
        }

        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 68px;
            gap: 16px;
        }

        .brand {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            flex-shrink: 0;
            text-decoration: none;
        }

        .brand-badge {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 36px;
            height: 36px;
            background: var(--primary);
            color: #fff;
            font-size: 15px;
            font-weight: 800;
            border-radius: 8px;
            letter-spacing: -0.02em;
            box-shadow: 0 2px 8px rgba(43, 108, 176, 0.25);
        }

        .brand-text {
            font-size: 20px;
            font-weight: 800;
            color: var(--text-primary);
            letter-spacing: 0;
            white-space: nowrap;
        }

        .nav-seg {
            display: flex;
            align-items: center;
            gap: 4px;
            background: var(--primary-light);
            border-radius: var(--radius-pill);
            padding: 4px;
        }

        .nav-chip {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            padding: 9px 18px;
            border-radius: var(--radius-pill);
            font-size: 14px;
            font-weight: 500;
            color: var(--text-secondary);
            background: transparent;
            border: none;
            cursor: pointer;
            transition: var(--transition-base);
            text-decoration: none;
            white-space: nowrap;
        }

        .nav-chip:hover {
            color: var(--primary);
            background: rgba(43, 108, 176, 0.08);
            text-decoration: none;
        }

        .nav-chip.active {
            background: var(--primary);
            color: #fff;
            box-shadow: 0 2px 8px rgba(43, 108, 176, 0.25);
        }

        .nav-chip.active:hover {
            color: #fff;
            background: var(--primary);
        }

        .nav-toggle {
            display: none;
            width: 44px;
            height: 44px;
            border: 1px solid var(--border);
            background: var(--surface);
            border-radius: var(--radius-md);
            color: var(--text-primary);
            font-size: 18px;
            align-items: center;
            justify-content: center;
            cursor: pointer;
            transition: var(--transition-base);
        }

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

        .nav-toggle:focus-visible,
        .btn-main:focus-visible,
        .btn-outline:focus-visible,
        .nav-chip:focus-visible {
            outline: 2px solid var(--primary);
            outline-offset: 2px;
        }

        /* ===== 面包屑 ===== */
        .breadcrumb-wrap {
            background: var(--bg-warm);
            border-bottom: 1px solid var(--border);
            padding: 14px 0;
        }

        .breadcrumb-custom {
            display: flex;
            align-items: center;
            gap: 8px;
            margin: 0;
            padding: 0;
            list-style: none;
            font-size: 13px;
            color: var(--text-muted);
            flex-wrap: wrap;
        }

        .breadcrumb-custom a {
            color: var(--primary);
            text-decoration: none;
        }

        .breadcrumb-custom a:hover {
            text-decoration: underline;
            text-underline-offset: 2px;
        }

        .breadcrumb-custom .sep {
            color: var(--text-muted);
            font-size: 12px;
        }

        .breadcrumb-custom li:last-child {
            font-weight: 500;
            color: var(--text-secondary);
            white-space: nowrap;
            overflow: hidden;
            text-overflow: ellipsis;
            max-width: 300px;
        }

        @media (max-width: 520px) {
            .breadcrumb-custom li:last-child {
                max-width: 180px;
            }
        }

        /* ===== 文章主体 ===== */
        .article-section {
            padding: 48px 0 72px;
        }

        .article-card {
            background: var(--surface);
            border-radius: var(--radius-lg);
            box-shadow: var(--shadow-card);
            border: 1px solid var(--border);
            padding: 48px 56px;
            max-width: 900px;
            margin: 0 auto;
        }

        .article-header {
            text-align: center;
            padding-bottom: 32px;
            margin-bottom: 32px;
            border-bottom: 1px solid var(--border);
        }

        .article-cat-chip {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            background: var(--primary-light);
            color: var(--primary);
            font-size: 12px;
            font-weight: 600;
            padding: 6px 14px;
            border-radius: var(--radius-pill);
            margin-bottom: 18px;
            letter-spacing: 0.02em;
        }

        .article-title {
            font-size: 32px;
            font-weight: 800;
            line-height: 1.3;
            color: var(--text-primary);
            margin: 0 0 18px;
            letter-spacing: -0.01em;
        }

        .article-meta {
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 20px;
            flex-wrap: wrap;
            font-size: 13px;
            color: var(--text-muted);
        }

        .meta-item {
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }

        .meta-item i {
            color: var(--secondary);
            font-size: 14px;
        }

        .article-body {
            max-width: 760px;
            margin: 0 auto;
            font-size: 16px;
            line-height: 1.85;
            color: var(--text-primary);
        }

        .article-body h2 {
            font-size: 24px;
            font-weight: 700;
            line-height: 1.4;
            margin: 40px 0 16px;
            color: var(--text-primary);
            padding-bottom: 8px;
            border-bottom: 1px solid var(--border);
        }

        .article-body h3 {
            font-size: 19px;
            font-weight: 600;
            line-height: 1.4;
            margin: 28px 0 12px;
            color: var(--text-primary);
        }

        .article-body p {
            margin: 0 0 20px;
            color: var(--text-secondary);
        }

        .article-body ul,
        .article-body ol {
            margin: 0 0 20px;
            padding-left: 24px;
            color: var(--text-secondary);
        }

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

        .article-body img {
            max-width: 100%;
            height: auto;
            border-radius: 8px;
            margin: 24px 0;
            box-shadow: var(--shadow-card);
        }

        .article-body blockquote {
            border-left: 4px solid var(--secondary);
            background: var(--bg-warm);
            padding: 16px 20px;
            border-radius: 0 var(--radius-md) var(--radius-md) 0;
            margin: 24px 0;
            color: var(--text-secondary);
            font-size: 15px;
        }

        .article-body blockquote p {
            margin-bottom: 0;
            color: var(--text-secondary);
        }

        .article-body a {
            color: var(--primary);
            text-decoration: underline;
            text-underline-offset: 3px;
            text-decoration-thickness: 1px;
        }

        .article-body a:hover {
            color: var(--primary-dark);
            text-decoration-thickness: 2px;
        }

        .article-body code {
            font-family: "JetBrains Mono", "SFMono-Regular", Consolas, monospace;
            background: var(--bg-warm);
            border: 1px solid var(--border);
            padding: 2px 6px;
            border-radius: 4px;
            font-size: 0.88em;
            color: #B0563C;
        }

        .article-body pre {
            background: #1E293B;
            color: #E2E8F0;
            padding: 20px 24px;
            border-radius: var(--radius-md);
            overflow-x: auto;
            margin: 24px 0;
            font-family: "JetBrains Mono", "SFMono-Regular", Consolas, monospace;
            font-size: 14px;
            line-height: 1.6;
            box-shadow: var(--shadow-card);
        }

        .article-body pre code {
            background: none;
            border: none;
            padding: 0;
            color: inherit;
            font-size: inherit;
            font-family: inherit;
        }

        .article-body table {
            width: 100%;
            border-collapse: collapse;
            margin: 24px 0;
            font-size: 14px;
            color: var(--text-secondary);
        }

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

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

        .article-body hr {
            border: none;
            border-top: 1px solid var(--border);
            margin: 32px 0;
        }

        .article-empty {
            text-align: center;
            padding: 72px 24px;
        }

        .article-empty i {
            font-size: 44px;
            color: var(--text-muted);
            margin-bottom: 16px;
            display: block;
        }

        .article-empty p {
            font-size: 16px;
            color: var(--text-secondary);
            margin-bottom: 24px;
        }

        .article-back {
            text-align: center;
            margin-top: 40px;
            padding-top: 32px;
            border-top: 1px solid var(--border);
        }

        /* ===== 相关推荐 ===== */
        .related-section {
            padding: 72px 0;
            background: var(--bg-warm);
            border-top: 1px solid var(--border);
        }

        .section-head {
            display: flex;
            align-items: center;
            justify-content: space-between;
            margin-bottom: 32px;
        }

        .section-head h2 {
            font-size: 28px;
            font-weight: 700;
            color: var(--text-primary);
            margin: 0;
            letter-spacing: -0.01em;
        }

        .section-more {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-size: 14px;
            font-weight: 600;
            color: var(--primary);
            text-decoration: none;
            transition: var(--transition-base);
        }

        .section-more:hover {
            color: var(--primary-dark);
            text-decoration: none;
        }

        .section-more i {
            transition: transform 0.25s ease;
        }

        .section-more:hover i {
            transform: translateX(4px);
        }

        .related-card {
            background: var(--surface);
            border-radius: var(--radius-lg);
            box-shadow: var(--shadow-card);
            border: 1px solid var(--border);
            overflow: hidden;
            height: 100%;
            transition: var(--transition-base);
            text-decoration: none;
            display: block;
        }

        .related-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-card-hover);
            border-color: rgba(43, 108, 176, 0.15);
            text-decoration: none;
        }

        .related-card-img-wrap {
            position: relative;
            overflow: hidden;
            height: 180px;
            background: var(--primary-light);
        }

        .related-card-img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.4s ease;
        }

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

        .related-cat {
            position: absolute;
            top: 12px;
            left: 12px;
            background: rgba(255, 255, 255, 0.92);
            color: var(--primary);
            font-size: 12px;
            font-weight: 600;
            padding: 4px 12px;
            border-radius: var(--radius-pill);
            box-shadow: 0 1px 6px rgba(16, 24, 40, 0.08);
        }

        .related-card-body {
            padding: 20px 20px 22px;
        }

        .related-title {
            font-size: 16px;
            font-weight: 600;
            color: var(--text-primary);
            margin: 0 0 10px;
            line-height: 1.5;
            transition: color 0.2s ease;
        }

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

        .related-summary {
            font-size: 14px;
            line-height: 1.6;
            color: var(--text-secondary);
            margin: 0 0 14px;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }

        .related-more {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-size: 13px;
            font-weight: 600;
            color: var(--primary);
        }

        .related-more i {
            transition: transform 0.25s ease;
            font-size: 12px;
        }

        .related-card:hover .related-more i {
            transform: translateX(4px);
        }

        /* ===== CTA ===== */
        .entry-cta {
            background: var(--primary);
            padding: 72px 0;
            text-align: center;
        }

        .entry-cta h2 {
            color: #fff;
            font-size: 30px;
            font-weight: 700;
            letter-spacing: -0.01em;
            margin: 0 0 12px;
        }

        .entry-cta p {
            color: rgba(255, 255, 255, 0.8);
            font-size: 16px;
            margin: 0 auto 28px;
            max-width: 520px;
        }

        .entry-cta .btn-main {
            min-width: 200px;
        }

        /* ===== Footer ===== */
        .site-footer {
            background: var(--footer-bg);
            padding: 56px 0 0;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 1.4fr 1fr 1fr;
            gap: 48px;
            padding-bottom: 40px;
        }

        .footer-brand {
            display: flex;
            align-items: center;
            gap: 10px;
            margin-bottom: 16px;
        }

        .footer-brand .brand-badge {
            background: rgba(255, 255, 255, 0.12);
            color: #fff;
            box-shadow: none;
        }

        .footer-brand-text {
            font-size: 18px;
            font-weight: 700;
            color: #fff;
        }

        .footer-desc {
            font-size: 14px;
            line-height: 1.7;
            color: var(--footer-text);
            margin: 0;
            max-width: 360px;
        }

        .footer-title {
            font-size: 15px;
            font-weight: 600;
            color: #fff;
            margin: 0 0 16px;
        }

        .footer-links {
            list-style: none;
            padding: 0;
            margin: 0;
            display: flex;
            flex-direction: column;
            gap: 10px;
        }

        .footer-links a {
            color: var(--footer-text);
            font-size: 14px;
            text-decoration: none;
            transition: color 0.2s ease;
        }

        .footer-links a:hover {
            color: #66A3FF;
        }

        .footer-disclaim {
            font-size: 13px;
            line-height: 1.7;
            color: var(--footer-text);
            margin: 0;
        }

        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.08);
            padding: 20px 0;
            text-align: center;
            background: rgba(0, 0, 0, 0.12);
        }

        .footer-bottom p {
            margin: 0;
            font-size: 13px;
            color: var(--footer-text);
            letter-spacing: 0.02em;
        }

        /* ===== 响应式 ===== */
        @media (max-width: 991px) {
            .article-card {
                padding: 40px 32px;
            }

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

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

            .nav-seg {
                display: none;
                position: absolute;
                top: 100%;
                left: 0;
                right: 0;
                background: var(--surface);
                padding: 16px 24px;
                flex-direction: column;
                align-items: stretch;
                gap: 8px;
                border-bottom: 1px solid var(--border);
                box-shadow: 0 12px 24px rgba(16, 24, 40, 0.08);
                border-radius: 0 0 var(--radius-lg) var(--radius-lg);
            }

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

            .nav-chip {
                justify-content: center;
                padding: 12px 18px;
            }

            .nav-cta {
                margin-right: 8px;
            }
        }

        @media (max-width: 767px) {
            .article-section {
                padding: 32px 0 48px;
            }

            .article-card {
                padding: 32px 20px;
            }

            .article-title {
                font-size: 26px;
            }

            .article-meta {
                gap: 12px;
                font-size: 12px;
            }

            .section-head {
                flex-direction: column;
                align-items: flex-start;
                gap: 12px;
            }

            .section-head h2 {
                font-size: 22px;
            }

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

            .entry-cta {
                padding: 48px 0;
            }

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

            .brand-text {
                font-size: 18px;
            }
        }

        @media (max-width: 520px) {
            .article-card {
                padding: 24px 16px;
            }

            .article-title {
                font-size: 22px;
            }

            .article-body {
                font-size: 15px;
            }

            .article-body h2 {
                font-size: 20px;
            }

            .footer-bottom p {
                font-size: 12px;
            }
        }

/* roulang page: category1 */
:root {
  --primary: #2B6CB0;
  --primary-light: #EBF4FF;
  --secondary: #2FB5A4;
  --accent: #E08A00;
  --bg-warm: #F7F7F5;
  --surface: #FFFFFF;
  --text-primary: #1F2937;
  --text-secondary: #4B5563;
  --text-muted: #9CA3AF;
  --border: #E5E7EB;
  --footer-bg: #102A43;
  --footer-text: #B0C4D9;
  --radius-lg: 10px;
  --radius-md: 6px;
  --shadow: 0 1px 2px rgba(16,24,40,0.04), 0 4px 16px rgba(16,24,40,0.06);
  --shadow-hover: 0 2px 4px rgba(16,24,40,0.05), 0 12px 24px rgba(16,24,40,0.08);
  --font-main: -apple-system, "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
  --font-mono: "JetBrains Mono", "SFMono-Regular", Consolas, monospace;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: var(--font-main);
  font-size: 16px;
  line-height: 1.75;
  color: var(--text-primary);
  background-color: var(--bg-warm);
  background-image: radial-gradient(circle at 2px 2px, rgba(16,24,40,0.025) 1px, transparent 0);
  background-size: 28px 28px;
  -webkit-font-smoothing: antialiased;
}

a {
  color: var(--primary);
  text-decoration: none;
  transition: color .25s ease;
}

a:hover {
  color: #1e5387;
}

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

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

h1, h2, h3, h4, h5, h6, p, ul {
  margin-top: 0;
}

ul {
  list-style: none;
  margin-bottom: 0;
}

a:focus-visible,
button:focus-visible {
  outline: 3px solid rgba(43,108,176,0.35);
  outline-offset: 2px;
  border-radius: 4px;
}

.container {
  --bs-gutter-x: 40px;
  width: 100%;
  max-width: 1200px;
  margin-right: auto;
  margin-left: auto;
  padding-right: calc(var(--bs-gutter-x) * 0.5);
  padding-left: calc(var(--bs-gutter-x) * 0.5);
}

@media (max-width: 767px) {
  .container {
    --bs-gutter-x: 24px;
  }
}

.row {
  --bs-gutter-x: 24px;
  --bs-gutter-y: 24px;
}

.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: 68px;
  background: transparent;
  transition: background .3s ease, box-shadow .3s ease, backdrop-filter .3s ease;
  z-index: 1000;
}

.site-header.scrolled {
  background: rgba(255,255,255,0.8);
  -webkit-backdrop-filter: blur(12px);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
  box-shadow: 0 1px 8px rgba(16,24,40,0.04);
}

.header-inner {
  display: flex;
  align-items: center;
  height: 68px;
  gap: 20px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--text-primary);
  font-weight: 800;
  text-decoration: none;
  flex-shrink: 0;
}

.brand-badge {
  width: 36px;
  height: 36px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: var(--primary);
  color: #fff;
  font-family: var(--font-mono);
  font-weight: 800;
  font-size: 14px;
  border-radius: 50%;
  border: 2px solid #fff;
  box-shadow: 0 0 0 2px var(--primary), 0 2px 6px rgba(43,108,176,0.25);
}

.brand-text {
  font-size: 20px;
  letter-spacing: -0.01em;
}

.nav-seg {
  display: flex;
  align-items: center;
  gap: 4px;
  background: var(--primary-light);
  padding: 4px;
  border-radius: 999px;
  margin: 0 auto;
}

.nav-chip {
  display: inline-flex;
  align-items: center;
  padding: 8px 18px;
  border-radius: 999px;
  font-size: 14px;
  font-weight: 500;
  color: var(--text-secondary);
  text-decoration: none;
  white-space: nowrap;
  transition: all .25s ease;
}

.nav-chip:hover {
  color: var(--primary);
  background: rgba(255,255,255,0.55);
}

.nav-chip.active {
  background: var(--primary);
  color: #fff;
  box-shadow: 0 2px 8px rgba(43,108,176,0.25);
}

.nav-cta {
  margin-left: auto;
  height: 40px;
  padding: 0 18px;
  font-size: 14px;
  box-shadow: none;
  flex-shrink: 0;
}

.nav-toggle {
  display: none;
  width: 44px;
  height: 44px;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  background: var(--surface);
  color: var(--text-primary);
  font-size: 18px;
  transition: all .25s ease;
}

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

.btn-main {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  height: 48px;
  padding: 0 28px;
  background: var(--accent);
  color: #fff !important;
  border: 1px solid var(--accent);
  border-radius: var(--radius-md);
  font-size: 16px;
  font-weight: 600;
  text-decoration: none;
  box-shadow: 0 2px 0 #C97B00;
  transition: all .25s ease;
  white-space: nowrap;
}

.btn-main:hover {
  background: #C97B00;
  border-color: #C97B00;
  color: #fff !important;
  transform: translateY(-1px);
  box-shadow: 0 4px 0 #B06D00, 0 8px 16px rgba(224,138,0,0.18);
}

.btn-main:active {
  transform: translateY(1px);
  box-shadow: 0 1px 0 #B06D00;
}

.btn-ghost {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  height: 48px;
  padding: 0 24px;
  background: transparent;
  color: var(--primary);
  border: 1.5px solid var(--primary);
  border-radius: var(--radius-md);
  font-size: 16px;
  font-weight: 600;
  text-decoration: none;
  transition: all .25s ease;
  white-space: nowrap;
}

.btn-ghost:hover {
  background: var(--primary-light);
  color: var(--primary);
  transform: translateY(-1px);
}

.page-hero {
  position: relative;
  padding: 168px 0 96px;
  background:
    linear-gradient(to right, rgba(247,247,245,0.97) 0%, rgba(247,247,245,0.9) 42%, rgba(247,247,245,0.72) 68%, rgba(247,247,245,0.55) 100%),
    url('/assets/images/backpic/back-1.png') center/cover no-repeat;
  border-bottom: 1px solid var(--border);
}

.hero-inner {
  max-width: 720px;
}

.hero-tag {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  font-weight: 600;
  color: var(--secondary);
  border: 1px solid rgba(47,181,164,0.3);
  background: rgba(47,181,164,0.06);
  padding: 5px 14px;
  border-radius: 999px;
  margin-bottom: 20px;
}

.page-hero h1 {
  font-size: 40px;
  line-height: 1.25;
  font-weight: 800;
  color: var(--text-primary);
  margin-bottom: 16px;
  letter-spacing: -0.01em;
}

.hero-sub {
  font-size: 17px;
  color: var(--text-secondary);
  line-height: 1.8;
  margin-bottom: 28px;
  max-width: 600px;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-bottom: 28px;
}

.hero-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 20px;
  font-size: 14px;
  color: var(--text-secondary);
}

.hero-meta span {
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.hero-meta i {
  color: var(--secondary);
}

.section-block {
  padding: 88px 0;
}

.section-head {
  max-width: 680px;
  margin: 0 auto 48px;
  text-align: center;
}

.section-kicker {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 600;
  color: var(--secondary);
  border: 1px solid rgba(47,181,164,0.28);
  background: rgba(47,181,164,0.06);
  padding: 4px 14px;
  border-radius: 999px;
  letter-spacing: 0.02em;
}

.section-title {
  font-size: 28px;
  font-weight: 700;
  line-height: 1.35;
  color: var(--text-primary);
  margin: 14px 0 12px;
}

.section-desc {
  font-size: 16px;
  color: var(--text-secondary);
  line-height: 1.75;
  max-width: 560px;
  margin-left: auto;
  margin-right: auto;
}

.entry-card {
  position: relative;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow);
  transition: transform .25s ease, box-shadow .25s ease;
  height: 100%;
  overflow: hidden;
}

.entry-card::after {
  content: "";
  position: absolute;
  inset: 8px;
  border: 1px solid rgba(43,108,176,0.08);
  border-radius: 6px;
  pointer-events: none;
  z-index: 2;
}

.entry-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-hover);
}

.card-media {
  height: 170px;
  overflow: hidden;
  position: relative;
  background: var(--primary-light);
}

.card-media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform .35s ease;
}

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

.entry-card-body {
  padding: 20px 22px 24px;
  position: relative;
  z-index: 3;
}

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

.entry-card-text {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.7;
  margin-bottom: 14px;
}

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

.entry-card-link i {
  margin-left: 6px;
  transition: transform .25s ease;
}

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

.scenario-section {
  padding: 88px 0;
  background:
    linear-gradient(rgba(16,42,67,0.84), rgba(16,42,67,0.88)),
    url('/assets/images/backpic/back-3.webp') center/cover fixed no-repeat;
}

.scenario-section .section-kicker {
  color: #5EEAD4;
  border-color: rgba(94,234,212,0.3);
  background: rgba(94,234,212,0.08);
}

.scenario-section .section-title {
  color: #fff;
}

.scenario-section .section-desc {
  color: var(--footer-text);
}

.scenario-card {
  background: rgba(255,255,255,0.06);
  border: 1px solid rgba(255,255,255,0.14);
  border-radius: var(--radius-lg);
  padding: 28px 26px;
  height: 100%;
  color: #fff;
  transition: all .25s ease;
}

.scenario-card:hover {
  background: rgba(255,255,255,0.1);
  transform: translateY(-2px);
}

.scenario-num {
  font-family: var(--font-mono);
  font-size: 26px;
  font-weight: 700;
  color: #5EEAD4;
  line-height: 1;
}

.scenario-card h3 {
  font-size: 18px;
  color: #fff;
  font-weight: 600;
  margin: 16px 0 10px;
}

.scenario-card p {
  font-size: 14px;
  color: var(--footer-text);
  line-height: 1.75;
  margin-bottom: 0;
}

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

.step-card {
  position: relative;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow);
  padding: 30px 24px 26px;
  transition: all .25s ease;
}

.step-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-hover);
}

.step-card:not(:last-child)::after {
  content: "";
  position: absolute;
  top: 48px;
  right: -24px;
  width: 24px;
  border-top: 2px dashed var(--border);
  z-index: 2;
}

.step-num {
  font-family: var(--font-mono);
  font-size: 28px;
  font-weight: 700;
  color: var(--secondary);
  line-height: 1;
  display: inline-block;
  background: rgba(47,181,164,0.08);
  border-radius: 8px;
  padding: 8px 12px;
  margin-bottom: 18px;
}

.step-card h3 {
  font-size: 17px;
  font-weight: 600;
  margin-bottom: 8px;
}

.step-card p {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.7;
  margin-bottom: 0;
}

.guide-points {
  padding: 88px 0;
  background: var(--primary-light);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}

.guide-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 56px;
  align-items: center;
}

.guide-copy h2 {
  font-size: 28px;
  font-weight: 700;
  line-height: 1.35;
  margin-bottom: 16px;
}

.guide-copy p {
  font-size: 16px;
  color: var(--text-secondary);
  line-height: 1.8;
  margin-bottom: 24px;
}

.link-arrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 15px;
  font-weight: 600;
  color: var(--primary);
  border-bottom: 2px solid transparent;
  transition: all .25s ease;
}

.link-arrow:hover {
  color: #1e5387;
  border-bottom-color: var(--primary);
}

.link-arrow i {
  transition: transform .25s ease;
}

.link-arrow:hover i {
  transform: translateX(4px);
}

.guide-card {
  position: relative;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow);
  padding: 30px 34px;
}

.guide-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  bottom: 0;
  width: 4px;
  background: var(--secondary);
  border-radius: 4px 0 0 4px;
}

.guide-card h3 {
  font-size: 18px;
  font-weight: 600;
  margin-bottom: 14px;
}

.guide-list li {
  display: flex;
  gap: 12px;
  align-items: flex-start;
  padding: 11px 0;
  font-size: 15px;
  color: var(--text-secondary);
  border-bottom: 1px dashed var(--border);
  line-height: 1.6;
}

.guide-list li:last-child {
  border-bottom: 0;
}

.guide-list li i {
  color: var(--secondary);
  font-size: 14px;
  margin-top: 5px;
}

.faq-section {
  padding: 88px 0;
}

.faq-wrap {
  max-width: 760px;
  margin: 0 auto;
}

.accordion {
  --bs-accordion-bg: transparent;
  --bs-accordion-border-width: 0;
  --bs-accordion-border-color: transparent;
  --bs-accordion-border-radius: 0;
  --bs-accordion-inner-border-radius: 0;
  --bs-accordion-btn-padding-x: 0;
  --bs-accordion-btn-padding-y: 18px;
  --bs-accordion-body-padding-x: 0;
  --bs-accordion-body-padding-y: 0;
  --bs-accordion-btn-focus-box-shadow: none;
}

.accordion-item {
  background: transparent;
  border: none;
  border-bottom: 1px solid var(--border);
}

.accordion-button {
  background: transparent;
  color: var(--text-primary);
  font-weight: 600;
  font-size: 16px;
  box-shadow: none;
  padding-right: 28px;
  display: flex;
  align-items: center;
  gap: 10px;
}

.accordion-button::before {
  content: "+";
  font-family: var(--font-mono);
  font-size: 22px;
  font-weight: 400;
  color: var(--secondary);
  line-height: 1;
  transition: transform .25s ease;
  flex-shrink: 0;
}

.accordion-button:not(.collapsed)::before {
  transform: rotate(45deg);
}

.accordion-button:not(.collapsed) {
  background: transparent;
  color: var(--text-primary);
  box-shadow: none;
}

.accordion-button::after {
  display: none;
}

.accordion-body {
  padding: 0 0 22px 32px;
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.75;
}

.cta-section {
  background: var(--primary);
  padding: 76px 0;
  position: relative;
  overflow: hidden;
}

.cta-section::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image: radial-gradient(circle at 1px 1px, rgba(255,255,255,0.08) 1px, transparent 0);
  background-size: 22px 22px;
  pointer-events: none;
}

.cta-inner {
  position: relative;
  text-align: center;
  max-width: 680px;
  margin: 0 auto;
}

.cta-inner h2 {
  color: #fff;
  font-size: 28px;
  font-weight: 700;
  line-height: 1.35;
  margin-bottom: 14px;
}

.cta-inner p {
  color: rgba(255,255,255,0.85);
  font-size: 15px;
  line-height: 1.75;
  margin-bottom: 30px;
}

.site-footer {
  background: var(--footer-bg);
  color: var(--footer-text);
  padding: 56px 0 0;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 0.8fr 1fr;
  gap: 48px;
  padding-bottom: 40px;
}

.footer-brand {
  display: flex;
  align-items: center;
  gap: 10px;
  color: #fff;
  font-size: 18px;
  font-weight: 800;
  margin-bottom: 14px;
}

.footer-brand-text {
  letter-spacing: -0.01em;
}

.footer-desc {
  font-size: 14px;
  line-height: 1.8;
  margin-bottom: 0;
  max-width: 360px;
}

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

.footer-links {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.footer-links a {
  color: var(--footer-text);
  font-size: 14px;
  text-decoration: none;
  transition: color .25s ease;
}

.footer-links a:hover {
  color: #66A3FF;
}

.footer-disclaim {
  font-size: 13px;
  line-height: 1.7;
  color: rgba(176,196,217,0.75);
  max-width: 280px;
  margin-bottom: 0;
}

.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.1);
  padding: 18px 0;
  text-align: center;
}

.footer-bottom p {
  margin: 0;
  font-size: 13px;
  color: rgba(176,196,217,0.65);
}

@media (max-width: 1199px) {
  .container {
    max-width: 100%;
  }
}

@media (max-width: 991px) {
  .nav-toggle {
    display: flex;
  }

  .nav-seg {
    position: absolute;
    top: 68px;
    left: 16px;
    right: 16px;
    flex-direction: column;
    align-items: stretch;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 12px;
    box-shadow: var(--shadow-hover);
    display: none;
    margin: 0;
  }

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

  .nav-chip {
    text-align: center;
    justify-content: center;
    padding: 12px 16px;
  }

  .nav-cta {
    margin-left: 0;
  }

  .guide-row {
    grid-template-columns: 1fr;
    gap: 36px;
  }

  .steps-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 20px;
  }

  .step-card:not(:last-child)::after {
    display: none;
  }

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

  .scenario-section {
    background-attachment: scroll;
  }
}

@media (max-width: 767px) {
  .section-block,
  .scenario-section,
  .guide-points,
  .faq-section {
    padding: 48px 0;
  }

  .page-hero {
    padding: 128px 0 64px;
  }

  .page-hero h1 {
    font-size: 28px;
  }

  .hero-sub {
    font-size: 16px;
  }

  .hero-actions {
    flex-direction: column;
    align-items: stretch;
  }

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

  .section-title {
    font-size: 22px;
  }

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

  .step-card {
    padding: 24px 22px;
  }

  .guide-card {
    padding: 24px 22px;
  }

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

  .cta-inner h2 {
    font-size: 22px;
  }

  .brand-text {
    font-size: 18px;
  }

  .header-inner {
    gap: 12px;
  }

  .nav-cta {
    padding: 0 14px;
    font-size: 13px;
  }
}

@media (max-width: 480px) {
  .container {
    --bs-gutter-x: 20px;
  }

  .nav-cta span {
    display: none;
  }

  .nav-cta {
    width: 44px;
    padding: 0;
  }

  .brand-text {
    font-size: 17px;
  }
}