/* roulang page: index */
:root {
  --primary: #00635C;
  --primary-dark: #004B46;
  --accent: #D8FF3E;
  --bg: #F5F3EE;
  --surface: #FFFFFF;
  --ink: #161A17;
  --muted: #6C726E;
  --line: #E4E1DA;
  --dark: #111714;
  --radius-card: 14px;
  --radius-btn: 10px;
  --shadow-card: 0 2px 10px rgba(17,23,20,0.05);
  --shadow-hover: 0 16px 32px rgba(17,23,20,0.09);
  --transition: 0.3s ease-out;
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}
html {
  scroll-behavior: smooth;
}
body {
  font-family: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", "Helvetica Neue", sans-serif;
  font-size: 1rem;
  line-height: 1.75;
  color: var(--ink);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
}
a {
  color: var(--primary);
  text-decoration: none;
  transition: color 0.3s ease-out, background 0.3s ease-out, border-color 0.3s ease-out, box-shadow 0.3s ease-out, transform 0.3s ease-out, opacity 0.3s ease-out;
}
a:hover {
  color: var(--primary-dark);
}
img {
  max-width: 100%;
  height: auto;
  display: block;
}
a:focus-visible,
button:focus-visible {
  outline: 3px solid var(--accent);
  outline-offset: 2px;
}

/* ===== 左侧固定导航 ===== */
.side-nav {
  position: fixed;
  top: 0;
  left: 0;
  width: 260px;
  height: 100vh;
  background: var(--dark);
  z-index: 1040;
  display: flex;
  flex-direction: column;
  overflow-y: auto;
  overflow-x: hidden;
}
.brand-area {
  display: flex;
  align-items: center;
  gap: 12px;
  height: 88px;
  padding: 0 20px;
  flex-shrink: 0;
  border-bottom: 1px solid rgba(255,255,255,0.06);
}
.brand-mark {
  width: 42px;
  height: 42px;
  flex-shrink: 0;
  background: linear-gradient(135deg, var(--primary), var(--primary-dark));
  border-radius: 10px;
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.25rem;
  font-weight: 700;
  box-shadow: inset 0 0 0 1px rgba(255,255,255,0.12);
}
.brand-text {
  color: #fff;
  font-size: 1.125rem;
  font-weight: 700;
  letter-spacing: -0.01em;
  white-space: nowrap;
}
.nav-block {
  flex: 1;
  padding: 24px 0;
}
.nav-item {
  display: flex;
  align-items: center;
  gap: 14px;
  height: 50px;
  padding: 0 24px;
  color: rgba(255,255,255,0.62);
  font-size: 0.875rem;
  font-weight: 500;
  position: relative;
  transition: all var(--transition);
}
.nav-item .nav-icon {
  width: 20px;
  text-align: center;
  font-size: 0.9375rem;
  flex-shrink: 0;
}
.nav-item:hover {
  color: #fff;
  background: rgba(255,255,255,0.04);
}
.nav-item.active {
  color: #fff;
  font-weight: 600;
}
.nav-item.active::after {
  content: "";
  position: absolute;
  right: 0;
  top: 50%;
  transform: translateY(-50%);
  width: 3px;
  height: 22px;
  background: var(--accent);
  border-radius: 3px 0 0 3px;
}
.side-contact {
  padding: 20px 24px 28px;
  border-top: 1px solid rgba(255,255,255,0.06);
  flex-shrink: 0;
}
.side-contact-label {
  display: block;
  font-size: 0.75rem;
  color: rgba(255,255,255,0.35);
  margin-bottom: 10px;
  letter-spacing: 0.05em;
}
.side-contact-item {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 0.8125rem;
  color: rgba(255,255,255,0.55);
  padding: 4px 0;
  white-space: nowrap;
}
.side-contact-item i {
  width: 16px;
  text-align: center;
  color: rgba(255,255,255,0.35);
  font-size: 0.8125rem;
}

/* ===== 主内容区 ===== */
.main-wrap {
  margin-left: 260px;
  min-height: 100vh;
  background: var(--bg);
}
.content-shell {
  max-width: 1320px;
  margin: 0 auto;
  padding: 0 32px 0 56px;
  position: relative;
}

/* ===== 移动端顶部导航 ===== */
.mobile-nav {
  display: none;
  position: sticky;
  top: 0;
  z-index: 1060;
  align-items: center;
  justify-content: space-between;
  height: 64px;
  padding: 0 20px;
  background: var(--dark);
}
.mobile-brand {
  display: flex;
  align-items: center;
  gap: 10px;
  color: #fff;
  font-weight: 700;
  font-size: 1.0625rem;
}
.mobile-brand .brand-mark {
  width: 32px;
  height: 32px;
  font-size: 0.9375rem;
  border-radius: 8px;
}
.mobile-toggle {
  width: 42px;
  height: 42px;
  border: none;
  background: transparent;
  color: #fff;
  font-size: 1.25rem;
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: background var(--transition);
}
.mobile-toggle:hover {
  background: rgba(255,255,255,0.08);
}
.mobile-drawer {
  position: fixed;
  inset: 0;
  background: var(--dark);
  z-index: 1080;
  padding: 80px 28px 32px;
  display: flex;
  flex-direction: column;
  transform: translateX(-100%);
  transition: transform 0.32s ease-out;
}
.mobile-drawer.open {
  transform: translateX(0);
}
.mobile-close {
  position: absolute;
  top: 16px;
  right: 16px;
  width: 42px;
  height: 42px;
  background: transparent;
  border: 1px solid rgba(255,255,255,0.12);
  color: #fff;
  font-size: 1.125rem;
  border-radius: 50%;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background var(--transition);
}
.mobile-close:hover {
  background: rgba(255,255,255,0.1);
}
.mobile-drawer .drawer-link {
  display: block;
  color: rgba(255,255,255,0.72);
  font-size: 1rem;
  font-weight: 500;
  padding: 14px 0;
  border-bottom: 1px solid rgba(255,255,255,0.07);
  transition: color var(--transition), padding-left var(--transition);
}
.mobile-drawer .drawer-link:hover {
  color: var(--accent);
  padding-left: 6px;
}
.mobile-drawer .drawer-link.active {
  color: var(--accent);
  font-weight: 600;
}

/* ===== 按钮 ===== */
.btn-main-lg {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  height: 52px;
  padding: 0 32px;
  background: var(--primary);
  color: #fff;
  font-size: 1rem;
  font-weight: 600;
  border-radius: var(--radius-btn);
  border: 1px solid transparent;
  transition: all var(--transition);
}
.btn-main-lg:hover {
  background: var(--accent);
  color: var(--ink);
  transform: translateY(-2px);
  box-shadow: 0 10px 24px rgba(0,99,92,0.18);
}
.btn-link-more {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  height: 52px;
  padding: 0 16px;
  color: var(--primary);
  font-weight: 600;
  font-size: 0.9375rem;
  border-bottom: 2px solid transparent;
  transition: all var(--transition);
}
.btn-link-more:hover {
  color: var(--primary-dark);
  border-bottom-color: var(--primary);
}
.btn-accent-lg {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  height: 56px;
  padding: 0 38px;
  background: var(--accent);
  color: var(--dark);
  font-size: 1rem;
  font-weight: 700;
  border-radius: var(--radius-btn);
  border: 1px solid transparent;
  letter-spacing: 0.02em;
  transition: all var(--transition);
}
.btn-accent-lg:hover {
  background: var(--primary);
  color: #fff;
  transform: translateY(-3px);
  box-shadow: 0 12px 30px rgba(0,0,0,0.25);
}

/* ===== Hero ===== */
.hero-section {
  position: relative;
  padding: 88px 0 96px;
  overflow: hidden;
  background: var(--bg);
}
.hero-bg {
  position: absolute;
  inset: 0;
  background-image: url('/assets/images/backpic/back-2.png');
  background-size: cover;
  background-position: center;
  opacity: 0.12;
}
.hero-bg::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(100deg, rgba(245,243,238,0.96) 20%, rgba(245,243,238,0.82) 60%, rgba(245,243,238,0.38) 100%);
}
.hero-content-wrap {
  position: relative;
  z-index: 2;
}
.hero-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--primary);
  letter-spacing: 0.06em;
  margin-bottom: 18px;
  text-transform: none;
}
.hero-eyebrow::before {
  content: "";
  width: 30px;
  height: 2px;
  background: var(--accent);
  border-radius: 2px;
}
.hero-copy h1 {
  font-size: clamp(2.25rem, 5vw, 4rem);
  font-weight: 700;
  line-height: 1.12;
  letter-spacing: -0.02em;
  color: var(--ink);
  margin-bottom: 24px;
  max-width: 720px;
}
.hero-sub {
  font-size: 1.0625rem;
  line-height: 1.8;
  color: var(--muted);
  max-width: 600px;
  margin-bottom: 32px;
}
.hero-actions {
  display: flex;
  align-items: center;
  gap: 20px;
  flex-wrap: wrap;
  margin-bottom: 44px;
}
.hero-stats {
  display: flex;
  gap: 0;
  max-width: 560px;
  border-top: 1px solid var(--line);
}
.stat-item {
  flex: 1;
  padding: 20px 16px 0 0;
}
.stat-item strong {
  display: block;
  font-size: 1.75rem;
  font-weight: 700;
  color: var(--primary);
  line-height: 1.2;
  letter-spacing: -0.02em;
}
.stat-item span {
  display: block;
  font-size: 0.8125rem;
  color: var(--muted);
  margin-top: 4px;
}
.hero-video-frame {
  position: relative;
  aspect-ratio: 9 / 16;
  max-width: 360px;
  max-height: 600px;
  margin-left: auto;
  margin-right: 0;
  border-radius: 18px;
  overflow: hidden;
  background: var(--dark);
  box-shadow: var(--shadow-hover);
}
.hero-video-frame img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.hero-video-frame::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(17,23,20,0.12) 0%, transparent 30%, transparent 65%, rgba(17,23,20,0.28) 100%);
}
.play-btn {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 68px;
  height: 68px;
  border-radius: 50%;
  background: rgba(255,255,255,0.92);
  border: none;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--primary);
  font-size: 22px;
  padding-left: 4px;
  cursor: pointer;
  z-index: 3;
  box-shadow: 0 8px 24px rgba(17,23,20,0.22);
  transition: all var(--transition);
}
.play-btn:hover {
  background: var(--primary);
  color: #fff;
  transform: translate(-50%, -50%) scale(1.06);
}
.hero-frame-tag {
  position: absolute;
  left: 16px;
  bottom: 16px;
  z-index: 3;
  background: rgba(17,23,20,0.65);
  color: #fff;
  font-size: 0.75rem;
  padding: 6px 12px;
  border-radius: 20px;
  backdrop-filter: blur(6px);
  letter-spacing: 0.02em;
}

/* ===== 通用板块头 ===== */
.section-head {
  max-width: 760px;
  margin-bottom: 52px;
}
.section-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--primary);
  letter-spacing: 0.06em;
  margin-bottom: 12px;
}
.section-eyebrow::before {
  content: "";
  width: 26px;
  height: 2px;
  background: var(--accent);
  border-radius: 2px;
}
.section-head h2 {
  font-size: clamp(1.5rem, 3vw, 2rem);
  font-weight: 650;
  line-height: 1.2;
  letter-spacing: -0.02em;
  color: var(--ink);
  margin-bottom: 14px;
}
.section-desc {
  color: var(--muted);
  font-size: 0.9375rem;
  line-height: 1.8;
  max-width: 640px;
  margin-bottom: 0;
}

/* ===== 爆款片段卡区 ===== */
.section-fragment {
  background: var(--surface);
  padding: 96px 0;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}
.fragment-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 32px;
  align-items: start;
}
.fragment-card {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius-card);
  overflow: hidden;
  transition: transform var(--transition), box-shadow var(--transition);
}
.fragment-card:nth-child(even) {
  margin-top: 56px;
}
.fragment-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-hover);
}
.fragment-media {
  position: relative;
  aspect-ratio: 4 / 5;
  overflow: hidden;
  background: var(--bg);
}
.fragment-media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--transition);
}
.fragment-card:hover .fragment-media img {
  transform: scale(1.03);
}
.fragment-play {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%) scale(0.85);
  width: 54px;
  height: 54px;
  border-radius: 50%;
  background: rgba(255,255,255,0.9);
  color: var(--primary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 17px;
  padding-left: 3px;
  opacity: 0;
  box-shadow: 0 6px 20px rgba(17,23,20,0.18);
  transition: all var(--transition);
}
.fragment-card:hover .fragment-play {
  opacity: 1;
  transform: translate(-50%, -50%) scale(1);
}
.fragment-body {
  padding: 24px;
}
.fragment-num {
  display: inline-block;
  font-size: 0.8125rem;
  font-weight: 700;
  color: var(--primary);
  margin-bottom: 8px;
  letter-spacing: 0.08em;
}
.fragment-body h3 {
  font-size: 1.25rem;
  font-weight: 600;
  letter-spacing: -0.01em;
  margin-bottom: 8px;
  color: var(--ink);
}
.fragment-body p {
  font-size: 0.875rem;
  color: var(--muted);
  line-height: 1.7;
  margin-bottom: 14px;
}
.fragment-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--primary);
}
.fragment-link:hover {
  color: var(--primary-dark);
  gap: 10px;
}

/* ===== 种草清单区 ===== */
.section-checklist {
  padding: 96px 0;
}
.checklist {
  border-top: 1px solid var(--line);
  margin-bottom: 36px;
}
.checklist-row {
  display: flex;
  align-items: center;
  gap: 24px;
  min-height: 84px;
  padding: 18px 20px;
  border-bottom: 1px solid var(--line);
  transition: background var(--transition);
}
.checklist-row:hover {
  background: rgba(0,99,92,0.04);
}
.check-num {
  font-size: 1.625rem;
  font-weight: 700;
  color: var(--primary);
  width: 56px;
  flex-shrink: 0;
  font-variant-numeric: tabular-nums;
  letter-spacing: -0.02em;
  transition: color var(--transition);
}
.checklist-row:hover .check-num {
  color: var(--primary-dark);
}
.check-main {
  flex: 1;
  min-width: 0;
}
.check-title {
  font-size: 1.0625rem;
  font-weight: 600;
  color: var(--ink);
  margin-bottom: 4px;
  transition: transform var(--transition), color var(--transition);
}
.checklist-row:hover .check-title {
  transform: translateX(-4px);
  color: var(--primary);
}
.check-desc {
  font-size: 0.875rem;
  color: var(--muted);
  margin-bottom: 0;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.check-metric {
  flex-shrink: 0;
  font-size: 1rem;
  font-weight: 600;
  color: var(--primary);
  text-align: right;
  min-width: 90px;
  font-variant-numeric: tabular-nums;
}
.check-arrow {
  flex-shrink: 0;
  width: 22px;
  text-align: center;
  color: var(--primary);
  opacity: 0;
  transform: translateX(-6px);
  transition: all var(--transition);
}
.checklist-row:hover .check-arrow {
  opacity: 1;
  transform: translateX(0);
}
.checklist-cta {
  text-align: center;
  padding-top: 8px;
}
.checklist-cta a {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 0.9375rem;
  font-weight: 600;
  color: var(--primary);
  padding: 12px 20px;
  border: 1px solid transparent;
  border-radius: var(--radius-btn);
  transition: all var(--transition);
}
.checklist-cta a:hover {
  border-color: var(--primary);
  background: rgba(0,99,92,0.04);
  gap: 12px;
}

/* ===== 评论 / 口碑条 ===== */
.section-testimonials {
  background: var(--surface);
  padding: 96px 0;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}
.testi-scroll {
  display: flex;
  gap: 24px;
  overflow-x: auto;
  scroll-snap-type: x mandatory;
  padding: 8px 4px 20px;
  scrollbar-width: thin;
  scrollbar-color: var(--line) transparent;
}
.testi-scroll::-webkit-scrollbar {
  height: 6px;
}
.testi-scroll::-webkit-scrollbar-thumb {
  background: var(--line);
  border-radius: 6px;
}
.testi-scroll::-webkit-scrollbar-track {
  background: transparent;
}
.testi-card {
  min-width: 320px;
  max-width: 320px;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius-card);
  padding: 24px;
  scroll-snap-align: start;
  display: flex;
  flex-direction: column;
  gap: 14px;
  transition: box-shadow var(--transition), transform var(--transition);
}
.testi-card:hover {
  box-shadow: var(--shadow-card);
  transform: translateY(-2px);
}
.testi-top {
  display: flex;
  align-items: center;
  gap: 12px;
}
.testi-avatar {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-size: 0.9375rem;
  font-weight: 600;
  flex-shrink: 0;
}
.av-1 { background: #00635C; }
.av-2 { background: #2F7E6E; }
.av-3 { background: #4E6E5E; }
.av-4 { background: #476B8A; }
.av-5 { background: #7A6845; }
.testi-id strong {
  display: block;
  font-size: 0.9375rem;
  font-weight: 600;
  color: var(--ink);
  line-height: 1.3;
}
.testi-id span {
  display: block;
  font-size: 0.75rem;
  color: var(--muted);
  line-height: 1.4;
}
.testi-stars {
  font-size: 0.875rem;
  color: var(--primary);
  letter-spacing: 0.1em;
}
.testi-text {
  font-size: 0.875rem;
  color: var(--ink);
  line-height: 1.7;
  margin-bottom: 0;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

/* ===== 深色 CTA ===== */
.cta-section {
  position: relative;
  background: var(--dark);
  padding: 96px 0;
  overflow: hidden;
}
.cta-section::before {
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse at 25% 45%, rgba(0,99,92,0.4) 0%, transparent 55%),
              radial-gradient(ellipse at 78% 75%, rgba(216,255,62,0.06) 0%, transparent 45%);
}
.cta-inner {
  position: relative;
  z-index: 2;
  max-width: 640px;
  margin: 0 auto;
  text-align: center;
}
.cta-kicker {
  display: inline-block;
  font-size: 0.8125rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  color: var(--accent);
  margin-bottom: 16px;
}
.cta-inner h2 {
  color: #fff;
  font-size: clamp(1.625rem, 3.4vw, 2.375rem);
  font-weight: 650;
  line-height: 1.25;
  letter-spacing: -0.02em;
  margin-bottom: 18px;
}
.cta-inner p {
  color: rgba(255,255,255,0.62);
  font-size: 1rem;
  line-height: 1.8;
  margin-bottom: 36px;
}
.cta-note {
  display: block;
  color: rgba(255,255,255,0.38);
  font-size: 0.8125rem;
  margin-top: 20px;
}

/* ===== 最新动态列表 ===== */
.section-news {
  padding: 96px 0;
  background: var(--bg);
}
.news-list {
  max-width: 920px;
}
.news-item {
  display: flex;
  gap: 24px;
  align-items: flex-start;
  padding: 22px 0;
  border-bottom: 1px solid var(--line);
  transition: background var(--transition);
}
.news-item:first-child {
  border-top: 1px solid var(--line);
}
.news-item:hover {
  background: rgba(0,99,92,0.03);
}
.news-thumb {
  width: 200px;
  height: 126px;
  flex-shrink: 0;
  border-radius: 12px;
  overflow: hidden;
  background: var(--line);
}
.news-thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--transition);
}
.news-item:hover .news-thumb img {
  transform: scale(1.04);
}
.news-body {
  flex: 1;
  min-width: 0;
}
.news-meta {
  display: flex;
  align-items: center;
  gap: 14px;
  margin-bottom: 8px;
}
.news-cat {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--primary);
  background: rgba(0,99,92,0.08);
  padding: 3px 10px;
  border-radius: 20px;
}
.news-date {
  font-size: 0.75rem;
  color: var(--muted);
}
.news-title {
  font-size: 1.0625rem;
  font-weight: 600;
  color: var(--ink);
  line-height: 1.5;
  margin-bottom: 6px;
  transition: color var(--transition);
}
.news-item:hover .news-title {
  color: var(--primary);
}
.news-excerpt {
  font-size: 0.875rem;
  color: var(--muted);
  line-height: 1.7;
  margin-bottom: 0;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.news-more {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--primary);
  margin-top: 8px;
}
.news-empty {
  text-align: center;
  padding: 56px 24px;
  color: var(--muted);
  font-size: 0.9375rem;
  border: 1px dashed var(--line);
  border-radius: var(--radius-card);
  background: var(--surface);
}

/* ===== FAQ ===== */
.section-faq {
  background: var(--surface);
  padding: 96px 0;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}
.faq-wrap {
  max-width: 820px;
}
.faq-accordion .accordion-item {
  background: transparent;
  border: none;
  border-bottom: 1px solid var(--line);
}
.faq-accordion .accordion-item:first-of-type {
  border-bottom: 1px solid var(--line);
}
.faq-accordion .accordion-button {
  background: transparent;
  box-shadow: none;
  color: var(--ink);
  font-size: 1rem;
  font-weight: 600;
  padding: 22px 44px 22px 0;
  line-height: 1.6;
  transition: color var(--transition);
}
.faq-accordion .accordion-button:hover {
  color: var(--primary);
  background: transparent;
}
.faq-accordion .accordion-button:not(.collapsed) {
  color: var(--primary);
  background: transparent;
  box-shadow: none;
}
.faq-accordion .accordion-button::after {
  background-image: none;
  content: "+";
  font-size: 1.5rem;
  font-weight: 300;
  color: var(--primary);
  width: 24px;
  height: 24px;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: transform 0.3s ease-out, color 0.3s ease-out;
}
.faq-accordion .accordion-button:not(.collapsed)::after {
  transform: rotate(45deg);
  color: var(--primary-dark);
}
.faq-accordion .accordion-body {
  padding: 0 44px 24px 0;
  color: var(--muted);
  font-size: 0.9375rem;
  line-height: 1.8;
}
.faq-accordion .accordion-body:last-child {
  border-bottom: 1px solid var(--line);
}

/* ===== 页脚 ===== */
.footer {
  background: var(--dark);
  color: rgba(255,255,255,0.6);
  padding: 64px 0 24px;
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.3fr 1fr 1.2fr;
  gap: 48px;
  padding-bottom: 40px;
  border-bottom: 1px solid rgba(255,255,255,0.08);
}
.footer-logo {
  color: #fff;
  font-size: 1.25rem;
  font-weight: 700;
  margin-bottom: 12px;
  display: flex;
  align-items: center;
  gap: 10px;
}
.footer-logo .brand-mark {
  width: 34px;
  height: 34px;
  font-size: 0.9375rem;
  border-radius: 8px;
}
.footer-brand p {
  font-size: 0.875rem;
  line-height: 1.8;
  color: rgba(255,255,255,0.5);
  max-width: 340px;
  margin-bottom: 0;
}
.footer-col h4 {
  color: #fff;
  font-size: 0.9375rem;
  font-weight: 600;
  margin-bottom: 16px;
}
.footer-col a {
  display: block;
  color: rgba(255,255,255,0.5);
  font-size: 0.875rem;
  padding: 6px 0;
  transition: color var(--transition);
}
.footer-col a:hover {
  color: var(--accent);
}
.footer-contact-item {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 0.875rem;
  color: rgba(255,255,255,0.5);
  padding: 6px 0;
}
.footer-contact-item i {
  width: 16px;
  color: rgba(255,255,255,0.3);
}
.footer-bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
  padding-top: 24px;
  font-size: 0.75rem;
  color: rgba(255,255,255,0.3);
}
.footer-icp {
  font-size: 0.75rem;
}

/* ===== 响应式 ===== */
@media (min-width: 1200px) {
  .side-nav { width: 260px; }
  .main-wrap { margin-left: 260px; }
}
@media (min-width: 992px) and (max-width: 1199.98px) {
  .side-nav { width: 88px; }
  .main-wrap { margin-left: 88px; }
  .brand-area { justify-content: center; padding: 0; }
  .brand-text { display: none; }
  .nav-item { justify-content: center; padding: 0; gap: 0; }
  .nav-item .nav-text {
    display: none;
    position: absolute;
    left: 64px;
    top: 50%;
    transform: translateY(-50%);
    background: var(--primary);
    color: #fff;
    padding: 5px 12px;
    border-radius: 6px;
    font-size: 0.75rem;
    white-space: nowrap;
    z-index: 1050;
    box-shadow: 0 4px 14px rgba(0,0,0,0.26);
    width: auto;
  }
  .nav-item:hover .nav-text {
    display: block;
  }
  .side-contact { display: none; }
  .content-shell { padding-left: 40px; padding-right: 24px; }
}
@media (max-width: 991.98px) {
  .side-nav { display: none; }
  .main-wrap { margin-left: 0; }
  .mobile-nav { display: flex; }
  .content-shell { padding: 0 24px; }
  .section-fragment, .section-checklist, .section-testimonials, .cta-section, .section-news, .section-faq { padding: 72px 0; }
  .hero-section { padding: 64px 0 72px; }
  .hero-video-frame { margin: 0 auto; max-width: 320px; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 767.98px) {
  .fragment-grid { grid-template-columns: 1fr; }
  .fragment-card:nth-child(even) { margin-top: 0; }
  .news-item { flex-direction: column; gap: 14px; }
  .news-thumb { width: 100%; height: auto; aspect-ratio: 16 / 9; }
  .checklist-row { min-height: 80px; padding: 16px 8px; }
  .check-desc { white-space: normal; }
  .check-metric { min-width: 64px; font-size: 0.875rem; }
  .hero-stats { flex-wrap: wrap; }
  .stat-item { min-width: 30%; }
}
@media (max-width: 575.98px) {
  body { font-size: 0.9375rem; }
  .content-shell { padding: 0 18px; }
  .section-fragment, .section-checklist, .section-testimonials, .cta-section, .section-news, .section-faq { padding: 48px 0; }
  .hero-section { padding: 44px 0 56px; }
  .hero-copy h1 { font-size: 2rem; }
  .hero-sub { font-size: 0.9375rem; }
  .hero-actions { gap: 12px; }
  .btn-main-lg { width: 100%; }
  .btn-link-more { justify-content: center; width: 100%; height: 44px; }
  .hero-video-frame { max-width: 280px; }
  .hero-stats { margin-top: 8px; }
  .stat-item strong { font-size: 1.375rem; }
  .fragment-body { padding: 18px; }
  .checklist-row { flex-wrap: wrap; gap: 6px 14px; }
  .check-num { width: 40px; font-size: 1.375rem; }
  .check-main { width: calc(100% - 60px); }
  .check-metric { margin-left: 54px; text-align: left; min-width: 0; }
  .check-arrow { display: none; }
  .testi-card { min-width: 260px; max-width: 260px; }
  .section-head { margin-bottom: 32px; }
  .footer-grid { grid-template-columns: 1fr; gap: 32px; padding-bottom: 28px; }
  .footer-bottom { flex-direction: column; align-items: flex-start; }
}

/* roulang page: article */
:root {
    --primary: #00635C;
    --primary-dark: #004B46;
    --accent: #D8FF3E;
    --bg: #F5F3EE;
    --surface: #FFFFFF;
    --ink: #161A17;
    --muted: #6C726E;
    --line: #E4E1DA;
    --dark: #111714;
    --radius-lg: 14px;
    --radius-md: 10px;
    --radius-sm: 8px;
    --shadow-sm: 0 2px 10px rgba(17,23,20,0.05);
    --shadow-lg: 0 16px 32px rgba(17,23,20,0.09);
    --transition: all 0.3s ease-out;
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", "Helvetica Neue", sans-serif;
    font-size: 1rem;
    line-height: 1.75;
    color: var(--ink);
    background-color: var(--bg);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

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

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

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

button {
    font-family: inherit;
}

.container {
    max-width: 1320px;
}

.btn-primary {
    background-color: var(--primary);
    border-color: var(--primary);
    color: #fff;
    border-radius: var(--radius-md);
    padding: 12px 28px;
    font-weight: 500;
    transition: var(--transition);
}

.btn-primary:hover,
.btn-primary:focus {
    background-color: var(--accent);
    border-color: var(--accent);
    color: var(--ink);
    box-shadow: none;
    transform: translateY(-2px);
}

.btn-outline-primary {
    background: transparent;
    border: 1px solid var(--primary);
    color: var(--primary);
    border-radius: var(--radius-md);
    padding: 12px 28px;
    font-weight: 500;
    transition: var(--transition);
}

.btn-outline-primary:hover,
.btn-outline-primary:focus {
    background: rgba(0, 99, 92, 0.1);
    border-color: var(--primary);
    color: var(--primary);
    box-shadow: none;
}

/* ===== 桌面端侧边导航 ===== */
.side-nav {
    position: fixed;
    top: 0;
    left: 0;
    width: 260px;
    height: 100vh;
    background: var(--dark);
    display: flex;
    flex-direction: column;
    padding: 0 20px;
    z-index: 1040;
    overflow-y: auto;
}

.side-nav-logo {
    display: flex;
    flex-direction: column;
    padding: 28px 12px 22px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.08);
    transition: var(--transition);
}

.side-nav-logo:hover {
    background: rgba(255, 255, 255, 0.02);
}

.logo-main {
    font-size: 1.4rem;
    font-weight: 700;
    color: #fff;
    letter-spacing: -0.02em;
    line-height: 1.2;
}

.logo-sub {
    font-size: 0.75rem;
    color: rgba(255, 255, 255, 0.45);
    margin-top: 4px;
    letter-spacing: 0.02em;
}

.side-nav-links {
    list-style: none;
    padding: 20px 0;
    flex: 1;
}

.side-nav-link {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 14px 12px;
    color: rgba(255, 255, 255, 0.65);
    font-size: 0.875rem;
    border-radius: var(--radius-sm);
    transition: var(--transition);
    position: relative;
}

.side-nav-link:hover {
    color: #fff;
    background: rgba(255, 255, 255, 0.06);
}

.side-nav-link.active {
    color: #fff;
    background: rgba(255, 255, 255, 0.08);
}

.side-nav-link.active::after {
    content: '';
    position: absolute;
    right: 0;
    top: 50%;
    transform: translateY(-50%);
    width: 2px;
    height: 20px;
    background: var(--accent);
    border-radius: 2px;
}

.nav-icon {
    font-size: 0.875rem;
    color: var(--accent);
    width: 20px;
    text-align: center;
    flex-shrink: 0;
}

.side-nav-contact {
    padding: 12px;
    border-top: 1px solid rgba(255, 255, 255, 0.08);
}

.contact-detail {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 0.75rem;
    color: rgba(255, 255, 255, 0.5);
    margin-bottom: 8px;
}

.contact-detail i {
    color: var(--accent);
    width: 14px;
    text-align: center;
    font-size: 0.7rem;
}

.side-nav-footer {
    padding: 14px 12px;
    font-size: 0.75rem;
    color: rgba(255, 255, 255, 0.3);
    border-top: 1px solid rgba(255, 255, 255, 0.08);
}

/* ===== 移动端顶部导航 ===== */
.mobile-topbar {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: 64px;
    background: var(--dark);
    align-items: center;
    justify-content: space-between;
    padding: 0 20px;
    z-index: 1050;
}

.mobile-logo {
    display: flex;
    align-items: center;
    gap: 8px;
}

.mobile-logo::before {
    content: '九';
    width: 28px;
    height: 28px;
    background: var(--accent);
    color: var(--dark);
    font-size: 0.8rem;
    font-weight: 700;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 6px;
}

.mobile-logo-text {
    color: #fff;
    font-size: 1.1rem;
    font-weight: 700;
    letter-spacing: -0.01em;
}

.mobile-menu-toggle {
    background: none;
    border: none;
    color: #fff;
    font-size: 1.4rem;
    cursor: pointer;
    padding: 6px 8px;
    border-radius: 6px;
}

.mobile-menu-toggle:hover {
    background: rgba(255, 255, 255, 0.1);
}

.mobile-menu {
    position: fixed;
    inset: 0;
    background: var(--dark);
    z-index: 1060;
    display: none;
    flex-direction: column;
    padding: 20px 24px;
    transform: translateX(100%);
    transition: transform 0.3s ease-out;
}

.mobile-menu.open {
    display: flex;
    transform: translateX(0);
}

.mobile-menu-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding-bottom: 20px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.mobile-menu-brand {
    color: #fff;
    font-size: 1.2rem;
    font-weight: 700;
}

.mobile-menu-close {
    background: none;
    border: none;
    color: #fff;
    font-size: 1.4rem;
    cursor: pointer;
    padding: 6px 8px;
    border-radius: 6px;
}

.mobile-menu-close:hover {
    background: rgba(255, 255, 255, 0.1);
}

.mobile-menu-list {
    list-style: none;
    padding: 24px 0;
    flex: 1;
}

.mobile-menu-list li {
    margin-bottom: 8px;
}

.mobile-menu-list a {
    display: block;
    padding: 14px 12px;
    color: rgba(255, 255, 255, 0.75);
    font-size: 1rem;
    border-radius: var(--radius-sm);
    transition: var(--transition);
}

.mobile-menu-list a:hover,
.mobile-menu-list a.active {
    color: #fff;
    background: rgba(255, 255, 255, 0.08);
}

.mobile-menu-footer {
    padding: 16px 12px;
    font-size: 0.75rem;
    color: rgba(255, 255, 255, 0.35);
    border-top: 1px solid rgba(255, 255, 255, 0.08);
}

/* ===== 主内容区 ===== */
.page-main {
    margin-left: 260px;
    min-height: 100vh;
    padding: 56px 64px 80px;
}

.article-wrap {
    max-width: 860px;
    margin: 0 auto;
}

/* ===== 面包屑 ===== */
.breadcrumb-nav {
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: 8px;
    font-size: 0.875rem;
    color: var(--muted);
    margin-bottom: 44px;
}

.breadcrumb-nav a {
    color: var(--muted);
    text-decoration: none;
    transition: var(--transition);
}

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

.breadcrumb-divider {
    color: var(--line);
    font-size: 0.75rem;
}

.breadcrumb-current {
    color: var(--ink);
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    max-width: 320px;
}

/* ===== 文章标题区 ===== */
.article-header {
    margin-bottom: 40px;
    padding-bottom: 32px;
    border-bottom: 1px solid var(--line);
}

.article-meta {
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: 16px;
    margin-bottom: 18px;
}

.article-category-badge {
    background: rgba(0, 99, 92, 0.1);
    color: var(--primary);
    font-size: 0.8rem;
    font-weight: 600;
    padding: 4px 14px;
    border-radius: 20px;
    letter-spacing: 0.02em;
}

.article-date,
.article-author {
    font-size: 0.85rem;
    color: var(--muted);
    display: inline-flex;
    align-items: center;
    gap: 6px;
}

.article-date i,
.article-author i {
    font-size: 0.8rem;
    color: var(--primary);
}

.article-title {
    font-size: clamp(1.8rem, 3.5vw, 2.4rem);
    font-weight: 700;
    line-height: 1.25;
    letter-spacing: -0.02em;
    color: var(--ink);
    margin: 0;
    text-rendering: optimizeLegibility;
}

/* ===== 正文区 ===== */
.article-content {
    font-size: 1rem;
    line-height: 1.9;
    color: var(--ink);
    max-width: 720px;
}

.article-content h2 {
    font-size: 1.5rem;
    font-weight: 650;
    margin: 44px 0 16px;
    line-height: 1.3;
    letter-spacing: -0.01em;
    color: var(--ink);
    position: relative;
    padding-left: 16px;
}

.article-content h2::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0.25em;
    bottom: 0.25em;
    width: 4px;
    background: var(--primary);
    border-radius: 4px;
}

.article-content h3 {
    font-size: 1.2rem;
    font-weight: 600;
    margin: 32px 0 12px;
    line-height: 1.3;
    color: var(--ink);
}

.article-content p {
    margin-bottom: 20px;
}

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

.article-content a:hover {
    color: var(--primary-dark);
    text-decoration: underline;
}

.article-content ul,
.article-content ol {
    margin-bottom: 20px;
    padding-left: 1.5rem;
}

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

.article-content blockquote {
    border-left: 4px solid var(--primary);
    padding: 16px 24px;
    margin: 28px 0;
    background: rgba(0, 99, 92, 0.04);
    border-radius: 0 var(--radius-md) var(--radius-md) 0;
    color: var(--muted);
    font-style: normal;
    line-height: 1.7;
}

.article-content figure {
    margin: 32px 0;
}

.article-content figcaption {
    margin-top: 12px;
    font-size: 0.85rem;
    color: var(--muted);
    text-align: center;
}

.article-content img {
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--line);
}

.article-content table {
    width: 100%;
    border-collapse: collapse;
    margin: 24px 0;
    font-size: 0.9rem;
}

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

.article-content th {
    background: rgba(0, 99, 92, 0.06);
    font-weight: 600;
}

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

/* ===== 内容未找到 ===== */
.article-not-found {
    background: var(--surface);
    border: 1px solid var(--line);
    border-radius: var(--radius-lg);
    padding: 48px 32px;
    text-align: center;
    box-shadow: var(--shadow-sm);
}

.article-not-found p {
    font-size: 1.1rem;
    color: var(--muted);
    margin-bottom: 20px;
}

/* ===== 相关推荐 ===== */
.related-articles {
    margin-top: 64px;
    padding-top: 40px;
    border-top: 1px solid var(--line);
}

.section-title {
    font-size: 1.4rem;
    font-weight: 650;
    margin-bottom: 24px;
    color: var(--ink);
    letter-spacing: -0.01em;
    display: flex;
    align-items: center;
    gap: 12px;
}

.section-title::after {
    content: '';
    flex: 1;
    height: 1px;
    background: var(--line);
    max-width: 120px;
}

.related-featured-link {
    display: flex;
    align-items: center;
    background: var(--surface);
    border: 1px solid var(--line);
    border-radius: var(--radius-lg);
    overflow: hidden;
    transition: var(--transition);
    margin-bottom: 16px;
    text-decoration: none;
}

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

.related-featured-link:hover .related-thumb {
    transform: scale(1.03);
}

.related-thumb {
    width: 220px;
    height: 140px;
    object-fit: cover;
    flex-shrink: 0;
    transition: transform 0.3s ease-out;
}

.related-featured-info {
    padding: 24px;
    flex: 1;
}

.related-tag {
    display: inline-block;
    background: rgba(0, 99, 92, 0.08);
    color: var(--primary);
    font-size: 0.75rem;
    font-weight: 600;
    padding: 4px 12px;
    border-radius: 20px;
    margin-bottom: 10px;
    letter-spacing: 0.02em;
}

.related-featured-info h3 {
    font-size: 1.15rem;
    font-weight: 650;
    margin-bottom: 8px;
    color: var(--ink);
    line-height: 1.3;
}

.related-featured-info p {
    font-size: 0.875rem;
    color: var(--muted);
    margin: 0;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
    line-height: 1.6;
}

.related-list-links {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.related-list-link {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 16px 20px;
    border: 1px solid var(--line);
    border-radius: var(--radius-lg);
    background: var(--surface);
    transition: var(--transition);
    text-decoration: none;
}

.related-list-link:hover {
    border-color: var(--primary);
    box-shadow: var(--shadow-sm);
    transform: translateX(4px);
}

.related-list-arrow {
    color: var(--primary);
    font-size: 1.125rem;
    flex-shrink: 0;
    font-weight: 600;
}

.related-list-link h4 {
    font-size: 0.95rem;
    font-weight: 600;
    margin-bottom: 4px;
    color: var(--ink);
    line-height: 1.3;
}

.related-list-meta {
    font-size: 0.8rem;
    color: var(--muted);
}

/* ===== 返回入口 ===== */
.article-back {
    margin-top: 48px;
    text-align: center;
}

.back-link {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--muted);
    padding: 10px 20px;
    border: 1px solid var(--line);
    border-radius: var(--radius-md);
    transition: var(--transition);
    text-decoration: none;
}

.back-link:hover {
    color: var(--primary);
    border-color: var(--primary);
    background: rgba(0, 99, 92, 0.04);
}

/* ===== 页脚 ===== */
.footer {
    margin-left: 260px;
    background: var(--dark);
    color: rgba(255, 255, 255, 0.7);
    padding: 56px 0 24px;
}

.content-shell {
    max-width: 1320px;
    padding: 0 64px;
    margin: 0 auto;
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr;
    gap: 48px;
    padding-bottom: 40px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.footer-logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 1.25rem;
    font-weight: 700;
    color: #fff;
    margin-bottom: 14px;
    letter-spacing: -0.01em;
}

.brand-mark {
    background: var(--accent);
    color: var(--dark);
    font-size: 0.875rem;
    font-weight: 700;
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 8px;
    flex-shrink: 0;
}

.footer-brand p {
    font-size: 0.875rem;
    line-height: 1.7;
    color: rgba(255, 255, 255, 0.5);
    max-width: 360px;
    margin: 0;
}

.footer-col h4 {
    font-size: 0.9rem;
    font-weight: 600;
    color: #fff;
    margin-bottom: 18px;
    letter-spacing: 0.02em;
}

.footer-col a {
    display: block;
    font-size: 0.85rem;
    color: rgba(255, 255, 255, 0.55);
    margin-bottom: 12px;
    transition: var(--transition);
    text-decoration: none;
}

.footer-col a:hover {
    color: var(--accent);
    padding-left: 4px;
}

.footer-contact-item {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 0.85rem;
    color: rgba(255, 255, 255, 0.55);
    margin-bottom: 12px;
}

.footer-contact-item i {
    color: var(--accent);
    width: 16px;
    text-align: center;
    font-size: 0.8rem;
}

.footer-bottom {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: 24px;
    font-size: 0.8rem;
    color: rgba(255, 255, 255, 0.35);
}

.footer-bottom a {
    color: rgba(255, 255, 255, 0.35);
    text-decoration: none;
}

.footer-bottom a:hover {
    color: var(--accent);
}

/* ===== 响应式 ===== */
@media (min-width: 1200px) {
    .side-nav {
        width: 260px;
    }
    .page-main {
        margin-left: 260px;
    }
    .footer {
        margin-left: 260px;
    }
}

@media (min-width: 992px) and (max-width: 1199.98px) {
    .side-nav {
        width: 88px;
        padding: 0 12px;
    }
    .side-nav-logo {
        justify-content: center;
        paddings: 24px 0;
        align-items: center;
    }
    .logo-main {
        font-size: 0;
        line-height: 0;
    }
    .logo-main::before {
        content: '九';
        font-size: 1.4rem;
        color: var(--accent);
        line-height: 1;
        font-weight: 700;
    }
    .logo-sub {
        display: none;
    }
    .side-nav-link {
        justify-content: center;
        padding: 14px 0;
    }
    .side-nav-link span:last-child {
        display: none;
    }
    .nav-icon {
        width: auto;
    }
    .side-nav-contact {
        display: none;
    }
    .side-nav-footer {
        font-size: 0;
        text-align: center;
        padding: 14px 0;
    }
    .side-nav-footer::before {
        content: 'lubhq.info';
        font-size: 0.6rem;
        color: rgba(255, 255, 255, 0.3);
        line-height: 1.4;
    }
    .page-main {
        margin-left: 88px;
        padding: 48px 32px;
    }
    .footer {
        margin-left: 88px;
    }
    .content-shell {
        padding: 0 32px;
    }
}

@media (max-width: 991.98px) {
    .side-nav {
        display: none;
    }
    .mobile-topbar {
        display: flex;
    }
    .mobile-menu {
        display: flex;
        transform: translateX(100%);
        transition: transform 0.3s ease-out;
    }
    .mobile-menu.open {
        transform: translateX(0);
    }
    .page-main {
        margin-left: 0;
        padding: 96px 24px 60px;
    }
    .footer {
        margin-left: 0;
    }
    .content-shell {
        padding: 0 24px;
    }
    .article-wrap {
        max-width: 100%;
    }
    .breadcrumb-nav {
        margin-bottom: 32px;
    }
    .article-title {
        font-size: 2rem;
    }
}

@media (max-width: 767.98px) {
    .page-main {
        padding: 88px 20px 48px;
    }
    .article-title {
        font-size: 1.75rem;
    }
    .article-meta {
        gap: 12px;
    }
    .related-featured-link {
        flex-direction: column;
        align-items: stretch;
    }
    .related-thumb {
        width: 100%;
        height: 160px;
        border-radius: var(--radius-lg) var(--radius-lg) 0 0;
    }
    .footer-grid {
        grid-template-columns: 1fr;
        gap: 32px;
        padding-bottom: 32px;
    }
    .footer-bottom {
        flex-direction: column;
        gap: 8px;
        align-items: flex-start;
    }
}

@media (max-width: 575.98px) {
    .page-main {
        padding: 80px 16px 40px;
        overflow-x: hidden;
    }
    .breadcrumb-current {
        max-width: 140px;
    }
    .article-header {
        margin-bottom: 28px;
        padding-bottom: 24px;
    }
    .article-meta {
        gap: 8px;
    }
    .article-date,
    .article-author {
        font-size: 0.8rem;
    }
    .article-content h2 {
        font-size: 1.3rem;
        margin-top: 32px;
    }
    .article-content h3 {
        font-size: 1.1rem;
    }
    .related-articles {
        margin-top: 40px;
        padding-top: 28px;
    }
    .related-featured-info {
        padding: 20px 18px;
    }
    .related-section-title {
        font-size: 1.2rem;
    }
    .content-shell {
        padding: 0 16px;
    }
    .footer {
        padding-top: 40px;
    }
}

/* roulang page: category1 */
:root {
            --primary: #00635C;
            --primary-dark: #004B46;
            --accent: #D8FF3E;
            --bg: #F5F3EE;
            --surface: #FFFFFF;
            --ink: #161A17;
            --muted: #6C726E;
            --line: #E4E1DA;
            --dark: #111714;
            --radius-card: 14px;
            --radius-btn: 10px;
            --shadow-sm: 0 2px 10px rgba(17, 23, 20, 0.05);
            --shadow-hover: 0 16px 32px rgba(17, 23, 20, 0.09);
            --transition: 0.3s ease-out;
        }

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

        html {
            scroll-behavior: smooth;
        }

        body {
            margin: 0;
            font-family: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", "Helvetica Neue", sans-serif;
            font-size: 1rem;
            line-height: 1.75;
            color: var(--ink);
            background: var(--bg);
            padding-left: 260px;
        }

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

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

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

        h1,
        h2,
        h3,
        h4 {
            font-weight: 700;
            line-height: 1.2;
            letter-spacing: -0.02em;
            margin: 0 0 0.5em;
        }

        p {
            margin-top: 0;
        }

        a:focus-visible,
        button:focus-visible,
        .accordion-button:focus-visible {
            outline: 3px solid var(--accent);
            outline-offset: 2px;
        }

        .content-shell {
            max-width: 1320px;
            margin: 0 auto;
            padding: 0 32px;
        }

        /* ========== 按钮 ========== */
        .btn {
            border-radius: var(--radius-btn);
            padding: 12px 28px;
            font-size: 1rem;
            font-weight: 600;
            transition: all var(--transition);
        }

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

        .btn-primary:hover,
        .btn-primary:focus {
            background: var(--accent);
            border-color: var(--accent);
            color: #000;
            transform: translateY(-2px);
            box-shadow: var(--shadow-hover);
        }

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

        .btn-outline-primary:hover {
            background: rgba(0, 99, 92, 0.1);
            border-color: var(--primary);
            color: var(--primary);
        }

        /* ========== 左侧导航 ========== */
        .side-nav {
            position: fixed;
            top: 0;
            left: 0;
            bottom: 0;
            width: 260px;
            background: var(--dark);
            display: flex;
            flex-direction: column;
            padding: 0 16px;
            z-index: 1000;
            transition: width var(--transition);
        }

        .side-nav-logo {
            display: flex;
            flex-direction: column;
            justify-content: center;
            height: 88px;
            color: #fff;
            padding: 0 12px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.08);
            gap: 2px;
        }

        .side-nav-logo:hover {
            color: #fff;
        }

        .logo-main {
            font-size: 1.25rem;
            font-weight: 700;
            letter-spacing: -0.02em;
        }

        .logo-sub {
            font-size: 0.75rem;
            color: rgba(255, 255, 255, 0.4);
        }

        .side-nav-links {
            list-style: none;
            margin: 0;
            padding: 24px 0;
            flex: 1;
        }

        .side-nav-links li {
            margin-bottom: 4px;
        }

        .side-nav-link {
            position: relative;
            display: flex;
            align-items: center;
            gap: 14px;
            height: 48px;
            padding: 0 14px;
            color: rgba(255, 255, 255, 0.65);
            font-size: 0.875rem;
            border-radius: 8px;
            transition: all var(--transition);
        }

        .side-nav-link .nav-icon {
            font-size: 1.05rem;
            width: 22px;
            text-align: center;
            color: var(--accent);
            opacity: 0.8;
        }

        .side-nav-link:hover {
            color: #fff;
            background: rgba(255, 255, 255, 0.05);
        }

        .side-nav-link.active {
            color: #fff;
            font-weight: 600;
            background: rgba(255, 255, 255, 0.06);
        }

        .side-nav-link.active::after {
            content: '';
            position: absolute;
            right: 0;
            top: 50%;
            transform: translateY(-50%);
            width: 3px;
            height: 22px;
            background: var(--accent);
            border-radius: 2px;
        }

        .side-nav-footer {
            padding: 16px 12px;
            color: rgba(255, 255, 255, 0.35);
            font-size: 0.75rem;
            border-top: 1px solid rgba(255, 255, 255, 0.08);
        }

        /* ========== 移动端顶部栏 ========== */
        .mobile-topbar {
            display: none;
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            height: 64px;
            background: var(--dark);
            align-items: center;
            justify-content: space-between;
            padding: 0 20px;
            z-index: 1100;
        }

        .mobile-logo {
            color: #fff;
            font-weight: 700;
            font-size: 1.125rem;
        }

        .mobile-toggle {
            background: transparent;
            border: 0;
            color: #fff;
            font-size: 1.25rem;
            padding: 8px;
            cursor: pointer;
        }

        .mobile-drawer {
            display: none;
            position: fixed;
            top: 0;
            right: 0;
            bottom: 0;
            width: min(320px, 85vw);
            background: var(--dark);
            flex-direction: column;
            padding: 24px;
            z-index: 1200;
            transform: translateX(100%);
            transition: transform 0.3s ease-out;
        }

        .mobile-drawer.open {
            transform: translateX(0);
        }

        .drawer-close {
            background: transparent;
            border: 0;
            color: #fff;
            font-size: 1.5rem;
            align-self: flex-end;
            cursor: pointer;
            padding: 8px;
        }

        .drawer-logo {
            color: #fff;
            font-size: 1.25rem;
            font-weight: 700;
            margin: 32px 0 24px;
            display: block;
        }

        .mobile-drawer ul {
            list-style: none;
            padding: 0;
            margin: 0;
        }

        .mobile-drawer li {
            margin-bottom: 8px;
        }

        .mobile-drawer a {
            display: flex;
            align-items: center;
            gap: 12px;
            color: rgba(255, 255, 255, 0.75);
            font-size: 1rem;
            padding: 12px;
            border-radius: 8px;
        }

        .mobile-drawer a:hover {
            background: rgba(255, 255, 255, 0.05);
            color: #fff;
        }

        .mobile-drawer i {
            width: 20px;
            text-align: center;
            color: var(--accent);
        }

        /* ========== 内容区 ========== */
        .content-main {
            padding: 0 32px;
        }

        .content-main section {
            padding: 80px 0;
        }

        .section-heading {
            font-size: clamp(1.5rem, 3vw, 2rem);
            font-weight: 650;
            margin-bottom: 12px;
        }

        .section-subhead {
            color: var(--muted);
            font-size: 0.95rem;
            margin-bottom: 40px;
            max-width: 720px;
        }

        /* ========== Hero ========== */
        .hero {
            padding-top: 96px !important;
            padding-bottom: 48px !important;
        }

        .breadcrumb {
            font-size: 0.875rem;
            color: var(--muted);
            margin-bottom: 24px;
            display: flex;
            align-items: center;
            flex-wrap: wrap;
        }

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

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

        .breadcrumb .sep {
            margin: 0 8px;
            color: #B7B5AF;
        }

        .breadcrumb .current {
            color: var(--primary);
            font-weight: 500;
        }

        .hero-title {
            font-size: clamp(2.25rem, 5vw, 3.6rem);
            margin-bottom: 24px;
        }

        .hero-title .brand {
            color: var(--primary);
        }

        .hero-lead {
            font-size: 1.125rem;
            color: var(--muted);
            max-width: 780px;
            margin-bottom: 16px;
        }

        .hero-lead strong {
            color: var(--ink);
            font-weight: 600;
        }

        .hero-stats {
            display: flex;
            flex-wrap: wrap;
            gap: 16px 48px;
            margin-top: 40px;
        }

        .stat-item {
            border-left: 3px solid var(--accent);
            padding-left: 16px;
        }

        .stat-num {
            font-size: 2rem;
            font-weight: 700;
            color: var(--primary);
            line-height: 1.2;
        }

        .stat-label {
            font-size: 0.875rem;
            color: var(--muted);
        }

        /* ========== 全宽配图 ========== */
        .full-image-block {
            position: relative;
            height: 440px;
            border-radius: var(--radius-card);
            background: url('/assets/images/backpic/back-1.png') center/cover no-repeat;
            margin: 32px 0 0;
            overflow: hidden;
            border: 1px solid var(--line);
        }

        .full-image-block::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(180deg, rgba(0, 0, 0, 0.02) 0%, rgba(17, 23, 20, 0.55) 100%);
        }

        .full-image-caption {
            position: absolute;
            left: 32px;
            bottom: 28px;
            color: #fff;
            font-size: 1rem;
            line-height: 1.6;
            z-index: 2;
            max-width: 520px;
            text-shadow: 0 2px 8px rgba(0, 0, 0, 0.35);
            margin: 0;
        }

        /* ========== 编号列表 ========== */
        .num-list {
            list-style: none;
            padding: 0;
            margin: 0;
        }

        .num-list li {
            display: flex;
            align-items: center;
            gap: 32px;
            padding: 28px 16px;
            border-bottom: 1px solid var(--line);
            transition: background var(--transition);
            cursor: default;
        }

        .num-list li:first-child {
            border-top: 1px solid var(--line);
        }

        .num-list li:hover {
            background: rgba(0, 99, 92, 0.04);
        }

        .num-key {
            font-size: 1.5rem;
            font-weight: 700;
            color: var(--primary);
            width: 56px;
            flex-shrink: 0;
            font-variant-numeric: tabular-nums;
        }

        .num-body {
            flex: 1;
        }

        .num-title {
            font-size: 1.125rem;
            font-weight: 600;
            margin-bottom: 4px;
            transition: transform var(--transition);
        }

        .num-desc {
            font-size: 0.875rem;
            color: var(--muted);
            margin: 0;
        }

        .num-arrow {
            color: var(--primary);
            opacity: 0;
            transform: translateX(-8px);
            transition: all var(--transition);
            font-size: 1.25rem;
            width: 24px;
            text-align: right;
        }

        .num-list li:hover .num-title {
            transform: translateX(4px);
            color: var(--primary);
        }

        .num-list li:hover .num-arrow {
            opacity: 1;
            transform: translateX(0);
        }

        /* ========== 典型应用场景 ========== */
        .scenario-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 48px;
            align-items: center;
        }

        .scenario-media img {
            width: 100%;
            border-radius: var(--radius-card);
            border: 1px solid var(--line);
            box-shadow: var(--shadow-sm);
        }

        .scenario-list {
            display: flex;
            flex-direction: column;
        }

        .scenario-row {
            padding: 20px 0;
            border-bottom: 1px solid var(--line);
            display: flex;
            gap: 24px;
            transition: padding-left var(--transition);
        }

        .scenario-row:last-child {
            border-bottom: 0;
        }

        .scenario-row:hover {
            padding-left: 8px;
        }

        .scenario-label {
            flex-shrink: 0;
            width: 96px;
            font-weight: 600;
            color: var(--primary);
        }

        .scenario-row p {
            margin: 0;
            color: var(--muted);
            font-size: 0.9375rem;
        }

        /* ========== 合作流程 ========== */
        .process-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
            margin-top: 40px;
        }

        .process-step {
            background: var(--surface);
            border: 1px solid var(--line);
            border-radius: var(--radius-card);
            padding: 28px 24px;
            transition: all var(--transition);
        }

        .process-step:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-hover);
            border-color: rgba(0, 99, 92, 0.3);
        }

        .process-num {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 44px;
            height: 44px;
            background: var(--primary);
            color: #fff;
            border-radius: 50%;
            font-size: 0.9375rem;
            font-weight: 700;
            margin-bottom: 16px;
            transition: background var(--transition);
        }

        .process-step:hover .process-num {
            background: var(--primary-dark);
        }

        .process-step h3 {
            font-size: 1.125rem;
            margin-bottom: 8px;
        }

        .process-step p {
            font-size: 0.875rem;
            color: var(--muted);
            margin: 0;
        }

        /* ========== FAQ ========== */
        .faq-section {
            background: var(--surface);
            border-top: 1px solid var(--line);
            border-bottom: 1px solid var(--line);
        }

        .faq-list {
            max-width: 860px;
            margin: 0 auto;
        }

        .accordion-item {
            background: transparent;
            border: 0;
            border-top: 1px solid var(--line);
            border-radius: 0 !important;
        }

        .accordion-item:first-child {
            border-top: 0;
        }

        .accordion-header {
            background: transparent;
        }

        .accordion-button {
            background: transparent;
            color: var(--ink);
            font-weight: 600;
            font-size: 1rem;
            font-family: inherit;
            padding: 22px 0;
            box-shadow: none;
            border-radius: 0 !important;
        }

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

        .accordion-button:focus {
            box-shadow: none;
            border-color: transparent;
        }

        .accordion-button::after {
            background-image: none;
            content: '+';
            font-size: 1.5rem;
            font-weight: 300;
            width: auto;
            height: auto;
            line-height: 1;
            color: var(--primary);
            transition: transform var(--transition);
        }

        .accordion-button:not(.collapsed)::after {
            transform: rotate(45deg);
            filter: none;
        }

        .accordion-body {
            padding: 0 32px 24px 0;
            color: var(--muted);
            font-size: 0.9375rem;
            line-height: 1.75;
        }

        .accordion-collapse {
            border-bottom: 1px solid var(--line);
        }

        /* ========== CTA ========== */
        .cta-section {
            background: var(--dark);
            color: #fff;
            text-align: center;
            padding: 96px 0;
            position: relative;
            overflow: hidden;
        }

        .cta-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background-image: radial-gradient(rgba(255, 255, 255, 0.06) 1px, transparent 1px);
            background-size: 24px 24px;
        }

        .cta-section .content-shell {
            position: relative;
            z-index: 2;
        }

        .cta-section h2 {
            color: #fff;
            font-size: clamp(1.75rem, 3vw, 2.5rem);
            margin-bottom: 16px;
        }

        .cta-section p {
            color: rgba(255, 255, 255, 0.7);
            margin-bottom: 40px;
            font-size: 1rem;
        }

        /* ========== 页脚 ========== */
        .footer {
            background: var(--dark);
            color: rgba(255, 255, 255, 0.7);
            padding: 64px 0 0;
        }

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

        .footer-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 1.25rem;
            font-weight: 700;
            color: #fff;
            margin-bottom: 16px;
        }

        .brand-mark {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 36px;
            height: 36px;
            background: var(--accent);
            color: var(--dark);
            font-weight: 700;
            border-radius: 8px;
            font-size: 1rem;
        }

        .footer-brand p {
            font-size: 0.875rem;
            color: rgba(255, 255, 255, 0.5);
            max-width: 340px;
            margin-bottom: 0;
            line-height: 1.7;
        }

        .footer-col h4 {
            color: #fff;
            font-size: 1rem;
            margin-bottom: 20px;
            font-weight: 600;
        }

        .footer-col a {
            display: block;
            color: rgba(255, 255, 255, 0.6);
            font-size: 0.875rem;
            padding: 6px 0;
        }

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

        .footer-contact-item {
            display: flex;
            align-items: center;
            gap: 12px;
            font-size: 0.875rem;
            padding: 6px 0;
            color: rgba(255, 255, 255, 0.6);
        }

        .footer-contact-item i {
            color: var(--accent);
            width: 16px;
        }

        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.08);
            padding: 24px 0;
            display: flex;
            justify-content: space-between;
            align-items: center;
            font-size: 0.8125rem;
            color: rgba(255, 255, 255, 0.4);
        }

        .footer-icp {
            color: rgba(255, 255, 255, 0.3);
        }

        /* ========== 响应式 ========== */
        @media (max-width: 1199.98px) {
            body {
                padding-left: 88px;
            }

            .side-nav {
                width: 88px;
                padding: 0 12px;
            }

            .side-nav-logo {
                align-items: center;
                padding: 0;
            }

            .logo-main {
                font-size: 1.5rem;
            }

            .logo-sub,
            .side-nav-footer {
                display: none;
            }

            .side-nav-link {
                justify-content: center;
                padding: 0;
            }

            .nav-text {
                display: none;
            }

            .side-nav-link:hover::after {
                content: attr(data-text);
                position: absolute;
                left: 88px;
                top: 50%;
                transform: translateY(-50%);
                background: var(--dark);
                color: #fff;
                padding: 8px 14px;
                border-radius: 8px;
                font-size: 0.8125rem;
                white-space: nowrap;
                z-index: 100;
                box-shadow: var(--shadow-hover);
            }

            .content-main {
                padding: 0 24px;
            }

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

        @media (max-width: 991.98px) {
            body {
                padding-left: 0;
                padding-top: 64px;
            }

            .side-nav {
                transform: translateX(-100%);
            }

            .mobile-topbar {
                display: flex;
            }

            .mobile-drawer {
                display: flex;
            }

            .content-main {
                padding: 0 20px;
            }

            .content-main section {
                padding: 56px 0;
            }

            .hero {
                padding-top: 64px !important;
            }

            .hero-title {
                font-size: clamp(2rem, 4.5vw, 3rem);
            }

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

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

        @media (max-width: 575.98px) {
            .content-main {
                padding: 0 16px;
            }

            .hero-title {
                font-size: 2rem;
            }

            .hero-stats {
                gap: 12px 24px;
            }

            .stat-num {
                font-size: 1.5rem;
            }

            .full-image-block {
                height: 300px;
            }

            .full-image-caption {
                left: 20px;
                bottom: 20px;
                font-size: 0.875rem;
            }

            .num-list li {
                flex-wrap: wrap;
                gap: 12px;
                padding: 20px 8px;
            }

            .num-key {
                width: 40px;
                font-size: 1.25rem;
            }

            .num-desc {
                width: 100%;
            }

            .num-arrow {
                display: none;
            }

            .scenario-row {
                flex-direction: column;
                gap: 8px;
            }

            .scenario-label {
                width: auto;
            }

            .process-grid {
                grid-template-columns: 1fr;
                gap: 16px;
            }

            .cta-section {
                padding: 72px 0;
            }

            .footer-bottom {
                flex-direction: column;
                gap: 8px;
                text-align: center;
            }
        }

/* roulang page: category2 */
:root {
      --primary: #00635C;
      --primary-dark: #004B46;
      --accent: #D8FF3E;
      --bg: #F5F3EE;
      --surface: #FFFFFF;
      --ink: #161A17;
      --muted: #6C726E;
      --line: #E4E1DA;
      --dark: #111714;
      --radius-card: 14px;
      --radius-btn: 10px;
      --shadow-1: 0 2px 10px rgba(17, 23, 20, 0.05);
      --shadow-2: 0 16px 32px rgba(17, 23, 20, 0.09);
      --transition: 300ms ease-out;
    }

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

    html {
      scroll-behavior: smooth;
    }

    body {
      font-family: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", "Helvetica Neue", sans-serif;
      font-size: 1rem;
      line-height: 1.75;
      color: var(--ink);
      background-color: var(--bg);
      -webkit-font-smoothing: antialiased;
    }

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

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

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

    .container,
    .container-fluid {
      max-width: 1320px;
    }

    /* ===== Buttons ===== */
    .btn {
      border-radius: var(--radius-btn);
      padding: 12px 28px;
      font-size: 0.9375rem;
      font-weight: 600;
      letter-spacing: 0.01em;
      transition: background var(--transition), color var(--transition), border-color var(--transition), transform var(--transition), box-shadow var(--transition);
    }

    .btn:focus,
    .btn:active:focus {
      box-shadow: 0 0 0 0.25rem rgba(0, 99, 92, 0.18);
    }

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

    .btn-primary:hover,
    .btn-primary:active {
      background: var(--accent);
      border-color: var(--accent);
      color: var(--ink);
      transform: translateY(-2px);
      box-shadow: var(--shadow-2);
    }

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

    .btn-outline:hover,
    .btn-outline:active {
      background: rgba(0, 99, 92, 0.1);
      border-color: var(--primary);
      color: var(--primary);
      transform: translateY(-2px);
    }

    /* ===== Layout：左侧导航 + 内容区 ===== */
    .side-nav {
      position: fixed;
      top: 0;
      left: 0;
      width: 260px;
      height: 100vh;
      background: var(--dark);
      display: flex;
      flex-direction: column;
      justify-content: space-between;
      z-index: 1040;
      transition: width var(--transition);
    }

    .side-nav-logo {
      display: flex;
      align-items: center;
      gap: 12px;
      height: 88px;
      padding: 0 24px;
      background: rgba(255, 255, 255, 0.04);
      border-bottom: 1px solid rgba(255, 255, 255, 0.07);
      width: 100%;
      flex-shrink: 0;
    }

    .brand-mark {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      width: 36px;
      height: 36px;
      background: var(--primary);
      color: var(--accent);
      border-radius: 10px;
      font-size: 1.125rem;
      font-weight: 700;
      flex-shrink: 0;
      letter-spacing: 0;
    }

    .logo-main {
      color: #fff;
      font-size: 1.0625rem;
      font-weight: 700;
      letter-spacing: -0.02em;
      line-height: 1.2;
      white-space: nowrap;
    }

    .logo-sub {
      display: block;
      color: rgba(255, 255, 255, 0.45);
      font-size: 0.6875rem;
      letter-spacing: 0.02em;
      margin-top: 2px;
      font-weight: 400;
    }

    .side-nav-links {
      list-style: none;
      padding: 24px 0;
      margin: 0;
      flex: 1;
    }

    .side-nav-links li {
      margin: 0;
    }

    .side-nav-link {
      display: flex;
      align-items: center;
      gap: 12px;
      height: 48px;
      padding: 0 24px;
      color: rgba(255, 255, 255, 0.62);
      font-size: 0.875rem;
      font-weight: 500;
      position: relative;
      transition: background var(--transition), color var(--transition);
    }

    .side-nav-link::after {
      content: "";
      position: absolute;
      right: 0;
      top: 50%;
      transform: translateY(-50%);
      width: 2px;
      height: 0;
      background: var(--accent);
      transition: height var(--transition);
    }

    .side-nav-link:hover {
      color: #fff;
      background: rgba(255, 255, 255, 0.05);
    }

    .side-nav-link:hover::after,
    .side-nav-link.active::after {
      height: 24px;
    }

    .side-nav-link.active {
      color: #fff;
      background: rgba(0, 99, 92, 0.28);
    }

    .nav-icon {
      color: var(--accent);
      font-size: 0.875rem;
      width: 20px;
      text-align: center;
      flex-shrink: 0;
    }

    .side-nav-footer {
      padding: 20px 24px;
      color: rgba(255, 255, 255, 0.3);
      font-size: 0.75rem;
      text-align: center;
      border-top: 1px solid rgba(255, 255, 255, 0.07);
    }

    .content-shell {
      margin-left: 260px;
      min-height: 100vh;
      display: flex;
      flex-direction: column;
    }

    /* ===== Mobile Header ===== */
    .mobile-header {
      display: none;
    }

    .mobile-drawer {
      display: none;
    }

    /* ===== Page Hero ===== */
    .page-hero {
      position: relative;
      padding: 88px 64px 72px;
      background-size: cover;
      background-position: center 30%;
      color: #fff;
    }

    .page-hero::before {
      content: "";
      position: absolute;
      inset: 0;
      background: linear-gradient(100deg, rgba(17, 23, 20, 0.9) 0%, rgba(17, 23, 20, 0.72) 55%, rgba(17, 23, 20, 0.42) 100%);
    }

    .page-hero > * {
      position: relative;
      z-index: 1;
    }

    .breadcrumb-line {
      display: flex;
      align-items: center;
      gap: 10px;
      font-size: 0.8125rem;
      color: rgba(255, 255, 255, 0.6);
      margin-bottom: 28px;
    }

    .breadcrumb-line a {
      color: rgba(216, 255, 62, 0.85);
    }

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

    .breadcrumb-line span {
      color: rgba(255, 255, 255, 0.4);
    }

    .page-hero h1 {
      font-size: clamp(2rem, 4vw, 3rem);
      font-weight: 700;
      line-height: 1.15;
      letter-spacing: -0.02em;
      margin-bottom: 20px;
      max-width: 720px;
    }

    .hero-lead {
      font-size: 1.125rem;
      line-height: 1.8;
      color: rgba(255, 255, 255, 0.82);
      max-width: 640px;
      margin-bottom: 36px;
    }

    .hero-actions {
      display: flex;
      gap: 16px;
      flex-wrap: wrap;
    }

    .hero-actions .btn-outline {
      border-color: rgba(255, 255, 255, 0.5);
      color: #fff;
    }

    .hero-actions .btn-outline:hover {
      background: rgba(255, 255, 255, 0.12);
      border-color: #fff;
      color: var(--accent);
    }

    /* ===== Split 图文交换 ===== */
    .split-section {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 56px;
      align-items: center;
      padding: 72px 64px;
      background: var(--bg);
    }

    .split-section + .split-section {
      border-top: 1px solid var(--line);
    }

    .split-section.reverse .split-image {
      order: 2;
    }

    .split-section.reverse .split-content {
      order: 1;
    }

    .split-image {
      position: relative;
      border-radius: var(--radius-card);
      overflow: hidden;
      box-shadow: var(--shadow-1);
    }

    .split-image img {
      width: 100%;
      height: 360px;
      object-fit: cover;
      transition: transform 600ms ease-out;
    }

    .split-image:hover img {
      transform: scale(1.03);
    }

    .image-tag {
      position: absolute;
      left: 16px;
      bottom: 16px;
      background: rgba(17, 23, 20, 0.78);
      color: var(--accent);
      font-size: 0.75rem;
      font-weight: 600;
      padding: 6px 14px;
      border-radius: 999px;
      letter-spacing: 0.04em;
      backdrop-filter: blur(4px);
    }

    .section-eyebrow {
      display: inline-block;
      font-size: 0.75rem;
      font-weight: 700;
      letter-spacing: 0.14em;
      color: var(--primary);
      text-transform: uppercase;
      margin-bottom: 12px;
    }

    .split-content h2 {
      font-size: clamp(1.5rem, 2.6vw, 2rem);
      font-weight: 650;
      line-height: 1.25;
      letter-spacing: -0.02em;
      margin-bottom: 18px;
    }

    .split-content p {
      color: var(--muted);
      margin-bottom: 20px;
      font-size: 0.9375rem;
      line-height: 1.85;
    }

    .check-list {
      list-style: none;
      padding: 0;
      margin: 0 0 24px;
    }

    .check-list li {
      position: relative;
      padding-left: 28px;
      margin-bottom: 10px;
      font-size: 0.9375rem;
      color: var(--ink);
    }

    .check-list li::before {
      content: "✓";
      position: absolute;
      left: 0;
      top: 0;
      color: var(--primary);
      font-weight: 700;
      font-size: 0.9375rem;
    }

    .text-link {
      font-weight: 600;
      font-size: 0.875rem;
      color: var(--primary);
      border-bottom: 1px solid transparent;
      transition: border-color var(--transition), color var(--transition);
    }

    .text-link:hover {
      color: var(--primary-dark);
      border-bottom-color: var(--primary);
    }

    /* ===== Matrix 卡片矩阵 ===== */
    .matrix-section {
      padding: 72px 64px;
      background: var(--surface);
      border-top: 1px solid var(--line);
    }

    .section-head {
      max-width: 640px;
      margin-bottom: 48px;
    }

    .section-head h2 {
      font-size: clamp(1.5rem, 2.6vw, 2rem);
      font-weight: 650;
      letter-spacing: -0.02em;
      line-height: 1.25;
      margin-bottom: 12px;
    }

    .section-head p {
      color: var(--muted);
      font-size: 0.9375rem;
    }

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

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

    .matrix-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-2);
      border-color: rgba(0, 99, 92, 0.35);
    }

    .matrix-card:hover .matrix-icon {
      background: var(--primary);
      color: var(--accent);
    }

    .matrix-icon {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      width: 52px;
      height: 52px;
      background: rgba(0, 99, 92, 0.08);
      color: var(--primary);
      border-radius: 12px;
      font-size: 1.375rem;
      margin-bottom: 20px;
      transition: background var(--transition), color var(--transition);
    }

    .matrix-card h3 {
      font-size: 1.0625rem;
      font-weight: 600;
      margin-bottom: 10px;
    }

    .matrix-card p {
      font-size: 0.875rem;
      color: var(--muted);
      line-height: 1.7;
      margin: 0;
    }

    .card-index {
      display: block;
      font-size: 0.6875rem;
      font-weight: 700;
      letter-spacing: 0.12em;
      color: rgba(0, 99, 92, 0.45);
      margin-bottom: 6px;
    }

    /* ===== Stats 数据条 ===== */
    .stats-strip {
      background: var(--primary);
      padding: 48px 64px;
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 24px;
    }

    .stat-item {
      text-align: center;
      color: #fff;
      padding: 8px 0;
    }

    .stat-item strong {
      display: block;
      font-size: clamp(1.75rem, 3vw, 2.5rem);
      font-weight: 700;
      line-height: 1.2;
      color: var(--accent);
      letter-spacing: -0.02em;
    }

    .stat-item span {
      display: block;
      font-size: 0.8125rem;
      color: rgba(255, 255, 255, 0.72);
      margin-top: 6px;
      letter-spacing: 0.06em;
    }

    /* ===== Process 流程 ===== */
    .process-section {
      padding: 72px 64px;
      background: var(--bg);
      border-top: 1px solid var(--line);
    }

    .process-section .section-head {
      margin-bottom: 48px;
    }

    .process-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 32px;
    }

    .process-step {
      position: relative;
      background: var(--surface);
      border: 1px solid var(--line);
      border-radius: var(--radius-card);
      padding: 32px 28px;
      transition: box-shadow var(--transition), transform var(--transition);
    }

    .process-step:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-2);
    }

    .step-num {
      position: absolute;
      top: 20px;
      right: 22px;
      font-size: 2rem;
      font-weight: 700;
      color: rgba(0, 99, 92, 0.12);
      line-height: 1;
      letter-spacing: -0.03em;
    }

    .process-step i {
      font-size: 1.375rem;
      color: var(--primary);
      margin-bottom: 16px;
      display: inline-block;
    }

    .process-step h3 {
      font-size: 1.0625rem;
      font-weight: 600;
      margin-bottom: 10px;
    }

    .process-step p {
      font-size: 0.875rem;
      color: var(--muted);
      line-height: 1.7;
      margin: 0;
    }

    /* ===== FAQ ===== */
    .faq-section {
      padding: 72px 64px;
      background: var(--surface);
      border-top: 1px solid var(--line);
    }

    .faq-section .section-head {
      margin-bottom: 40px;
    }

    .accordion-item {
      background: transparent;
      border: 0;
      border-bottom: 1px solid var(--line);
    }

    .accordion-item:first-child {
      border-top: 1px solid var(--line);
    }

    .accordion-button {
      background: transparent;
      color: var(--ink);
      font-size: 1rem;
      font-weight: 600;
      padding: 24px 44px 24px 0;
      position: relative;
      box-shadow: none;
      border: 0;
      line-height: 1.5;
    }

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

    .accordion-button::before {
      content: "+";
      position: absolute;
      right: 4px;
      top: 50%;
      transform: translateY(-50%);
      font-size: 1.375rem;
      font-weight: 400;
      color: var(--primary);
      transition: transform 300ms ease-out;
      line-height: 1;
    }

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

    .accordion-button:not(.collapsed)::before {
      transform: translateY(-50%) rotate(45deg);
      color: var(--primary-dark);
    }

    .accordion-button:focus {
      box-shadow: none;
      border: 0;
    }

    .accordion-body {
      padding: 0 64px 24px 0;
      color: var(--muted);
      font-size: 0.875rem;
      line-height: 1.8;
    }

    /* ===== CTA ===== */
    .cta-section {
      background: var(--dark);
      padding: 88px 64px;
      text-align: center;
      position: relative;
      overflow: hidden;
    }

    .cta-section::before {
      content: "";
      position: absolute;
      inset: 0;
      background: radial-gradient(circle at 30% 20%, rgba(0, 99, 92, 0.55), transparent 60%),
        radial-gradient(circle at 75% 85%, rgba(216, 255, 62, 0.08), transparent 45%);
    }

    .cta-section > * {
      position: relative;
      z-index: 1;
    }

    .cta-section h2 {
      color: #fff;
      font-size: clamp(1.5rem, 3vw, 2.125rem);
      font-weight: 650;
      letter-spacing: -0.02em;
      margin-bottom: 16px;
    }

    .cta-section p {
      color: rgba(255, 255, 255, 0.65);
      max-width: 560px;
      margin: 0 auto 36px;
      font-size: 0.9375rem;
    }

    .btn-cta {
      background: var(--accent);
      border: 1px solid var(--accent);
      color: var(--ink);
      font-size: 1rem;
      font-weight: 700;
      padding: 14px 40px;
    }

    .btn-cta:hover {
      background: var(--primary);
      border-color: var(--primary);
      color: #fff;
      transform: translateY(-3px);
      box-shadow: var(--shadow-2);
    }

    /* ===== Footer ===== */
    .footer {
      background: var(--dark);
      color: rgba(255, 255, 255, 0.7);
      padding: 64px 64px 32px;
      margin-top: auto;
    }

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

    .footer-logo {
      display: flex;
      align-items: center;
      gap: 12px;
      color: #fff;
      font-size: 1.125rem;
      font-weight: 700;
      margin-bottom: 16px;
    }

    .footer-brand p {
      font-size: 0.875rem;
      line-height: 1.8;
      color: rgba(255, 255, 255, 0.5);
      max-width: 320px;
      margin: 0;
    }

    .footer-col h4 {
      color: #fff;
      font-size: 0.9375rem;
      font-weight: 600;
      margin-bottom: 18px;
    }

    .footer-col a {
      display: block;
      color: rgba(255, 255, 255, 0.55);
      font-size: 0.875rem;
      margin-bottom: 12px;
      transition: color var(--transition);
    }

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

    .footer-contact-item {
      display: flex;
      align-items: center;
      gap: 12px;
      font-size: 0.875rem;
      color: rgba(255, 255, 255, 0.55);
      margin-bottom: 12px;
    }

    .footer-contact-item i {
      color: var(--accent);
      width: 16px;
      text-align: center;
    }

    .footer-bottom {
      border-top: 1px solid rgba(255, 255, 255, 0.1);
      padding-top: 24px;
      display: flex;
      justify-content: space-between;
      align-items: center;
      gap: 12px;
      flex-wrap: wrap;
      font-size: 0.75rem;
      color: rgba(255, 255, 255, 0.35);
    }

    .footer-icp {
      letter-spacing: 0.04em;
    }

    /* ===== Responsive ===== */
    @media (max-width: 1199.98px) {
      .side-nav {
        width: 88px;
      }

      .side-nav-logo {
        justify-content: center;
        padding: 0 12px;
      }

      .side-nav-logo .logo-main,
      .side-nav-logo .logo-sub {
        display: none;
      }

      .side-nav-link {
        justify-content: center;
        padding: 0 12px;
        gap: 0;
      }

      .side-nav-link span:not(.nav-icon) {
        display: none;
      }

      .side-nav-footer {
        font-size: 0.625rem;
        padding: 14px 4px;
        word-break: break-all;
      }

      .content-shell {
        margin-left: 88px;
      }

      .page-hero,
      .split-section,
      .matrix-section,
      .process-section,
      .faq-section,
      .cta-section,
      .footer {
        padding-left: 48px;
        padding-right: 48px;
      }
    }

    @media (max-width: 991.98px) {
      .side-nav {
        display: none;
      }

      .content-shell {
        margin-left: 0;
      }

      .mobile-header {
        display: flex;
        align-items: center;
        justify-content: space-between;
        height: 68px;
        padding: 0 24px;
        background: var(--dark);
        position: sticky;
        top: 0;
        z-index: 1050;
      }

      .mobile-header .mobile-logo {
        display: flex;
        align-items: center;
        gap: 10px;
        color: #fff;
        font-size: 1.0625rem;
        font-weight: 700;
      }

      .mobile-header .brand-mark {
        width: 32px;
        height: 32px;
        font-size: 1rem;
      }

      .hamburger {
        background: transparent;
        border: 0;
        width: 40px;
        height: 40px;
        display: inline-flex;
        flex-direction: column;
        align-items: center;
        justify-content: center;
        gap: 5px;
        cursor: pointer;
        border-radius: 8px;
      }

      .hamburger span {
        display: block;
        width: 22px;
        height: 2px;
        background: #fff;
        border-radius: 2px;
        transition: background 300ms ease-out;
      }

      .hamburger:hover span {
        background: var(--accent);
      }

      .mobile-drawer {
        display: flex;
        position: fixed;
        inset: 0;
        background: var(--dark);
        flex-direction: column;
        justify-content: center;
        align-items: center;
        gap: 8px;
        z-index: 1060;
        opacity: 0;
        visibility: hidden;
        transition: opacity 300ms ease-out, visibility 300ms ease-out;
      }

      .mobile-drawer.open {
        opacity: 1;
        visibility: visible;
      }

      .drawer-close {
        position: absolute;
        top: 20px;
        right: 24px;
        background: transparent;
        border: 0;
        color: #fff;
        font-size: 2rem;
        line-height: 1;
        cursor: pointer;
        width: 44px;
        height: 44px;
      }

      .drawer-close:hover {
        color: var(--accent);
      }

      .mobile-drawer a {
        color: rgba(255, 255, 255, 0.72);
        font-size: 1.125rem;
        font-weight: 500;
        padding: 12px 28px;
        border-radius: 8px;
        transition: background var(--transition), color var(--transition);
      }

      .mobile-drawer a:hover,
      .mobile-drawer a.active {
        color: var(--accent);
        background: rgba(0, 99, 92, 0.3);
      }

      .page-hero {
        padding: 56px 32px 56px;
      }

      .split-section {
        grid-template-columns: 1fr;
        gap: 32px;
        padding: 56px 32px;
      }

      .split-section.reverse .split-image {
        order: 0;
      }

      .split-section.reverse .split-content {
        order: 1;
      }

      .split-image img {
        height: 300px;
      }

      .matrix-section,
      .process-section,
      .faq-section,
      .cta-section {
        padding: 56px 32px;
      }

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

      .stats-strip {
        padding: 40px 32px;
        grid-template-columns: repeat(2, 1fr);
        gap: 28px 16px;
      }

      .process-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 24px;
      }

      .footer {
        padding: 48px 32px 28px;
      }

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

    @media (max-width: 575.98px) {
      .page-hero {
        padding: 40px 20px 48px;
      }

      .page-hero h1 {
        font-size: 2rem;
      }

      .hero-lead {
        font-size: 0.9375rem;
      }

      .hero-actions .btn {
        padding: 10px 20px;
        font-size: 0.875rem;
      }

      .split-section,
      .matrix-section,
      .process-section,
      .faq-section,
      .cta-section {
        padding: 48px 20px;
      }

      .split-image img {
        height: 240px;
      }

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

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

      .stats-strip {
        grid-template-columns: 1fr 1fr;
        padding: 36px 20px;
      }

      .stat-item strong {
        font-size: 1.625rem;
      }

      .cta-section {
        padding: 56px 20px;
      }

      .cta-section p {
        font-size: 0.875rem;
      }

      .footer {
        padding: 40px 20px 24px;
      }

      .footer-bottom {
        flex-direction: column;
        align-items: flex-start;
        gap: 8px;
      }

      .accordion-body {
        padding-right: 32px;
      }
    }