/* roulang page: index */
:root {
  --brand: #1F3D2B;
  --brand-dark: #172E20;
  --accent: #A87532;
  --bg: #FFFFFF;
  --bg-alt: #F6F6F4;
  --bg-deep: #F1F1EF;
  --text: #171717;
  --text-body: #3D3D3D;
  --text-muted: #8A8A8E;
  --border: #E5E5E3;
  --success: #2D7D5B;
  --warning: #B95C3B;
  --shadow-sm: 0 1px 2px rgba(0,0,0,0.04), 0 2px 8px rgba(0,0,0,0.04);
  --shadow-md: 0 8px 20px rgba(0,0,0,0.08), 0 2px 6px rgba(0,0,0,0.05);
  --shadow-lg: 0 20px 40px -12px rgba(0,0,0,0.15);
  --radius: 12px;
  --radius-full: 9999px;
}

* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: auto; }
body {
  font-family: system-ui, -apple-system, "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.8;
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; transition: all 0.2s ease-out; }
button { font-family: inherit; cursor: pointer; }
ul, ol { list-style: none; }

.container { max-width: 1200px; margin: 0 auto; padding: 0 16px; }
@media (min-width: 768px) { .container { padding: 0 24px; } }

/* 顶部信息条 */
.topbar {
  background: var(--brand-dark);
  color: rgba(255, 255, 255, 0.88);
  font-size: 12px;
  line-height: 1;
}
.topbar .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 36px;
  gap: 12px;
}
.topbar-domain {
  font-weight: 600;
  opacity: 0.7;
  letter-spacing: 0.02em;
}
.topbar-safe {
  color: #E8C99B;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 12px;
}
.topbar-safe i { font-size: 11px; }
.topbar-action {
  color: #ffffff;
  font-weight: 500;
  padding: 4px 14px;
  border: 1px solid rgba(255, 255, 255, 0.25);
  border-radius: var(--radius-full);
  font-size: 12px;
  transition: all 0.2s ease-out;
}
.topbar-action:hover {
  background: rgba(255, 255, 255, 0.12);
  border-color: rgba(255, 255, 255, 0.45);
}

/* 主导航 */
.main-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid rgba(0, 0, 0, 0.05);
  transition: box-shadow 0.2s ease;
}
.main-header.scrolled {
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.06);
}
.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 68px;
  gap: 16px;
}
.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
}
.brand-logo {
  width: 38px;
  height: 38px;
  border-radius: 10px;
  background: linear-gradient(135deg, var(--brand) 0%, var(--brand-dark) 100%);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-size: 18px;
  font-weight: 700;
  box-shadow: 0 4px 12px rgba(31, 61, 43, 0.25);
}
.brand-text { display: flex; flex-direction: column; line-height: 1.2; }
.brand-name {
  font-size: 17px;
  font-weight: 700;
  color: var(--brand);
  letter-spacing: 0.01em;
}
.brand-sub {
  font-size: 11px;
  color: var(--text-muted);
  font-weight: 500;
}
.nav-menu {
  display: flex;
  align-items: center;
  gap: 4px;
}
.nav-link {
  padding: 8px 14px;
  font-size: 15px;
  font-weight: 500;
  color: var(--text);
  border-radius: 8px;
  position: relative;
  transition: color 0.2s ease, background 0.2s ease;
  white-space: nowrap;
}
.nav-link:hover {
  color: var(--brand);
  background: rgba(31, 61, 43, 0.04);
}
.nav-link.active {
  color: var(--brand);
  font-weight: 600;
}
.nav-link.active::after {
  content: '';
  position: absolute;
  left: 14px;
  right: 14px;
  bottom: 2px;
  height: 2px;
  background: var(--brand);
  border-radius: 2px;
}
.nav-actions {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
}

/* 按钮 */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-weight: 500;
  border-radius: var(--radius-full);
  transition: all 0.2s ease-out;
  border: none;
  white-space: nowrap;
}
.btn-primary {
  background: var(--brand);
  color: #ffffff;
  padding: 10px 24px;
  font-size: 15px;
  box-shadow: 0 2px 6px rgba(31, 61, 43, 0.15);
}
.btn-primary:hover {
  background: var(--brand-dark);
  box-shadow: 0 4px 14px rgba(31, 61, 43, 0.28);
  transform: translateY(-1px);
}
.btn-outline {
  background: transparent;
  border: 1px solid var(--brand);
  color: var(--brand);
  padding: 10px 24px;
  font-size: 15px;
}
.btn-outline:hover {
  background: rgba(31, 61, 43, 0.05);
  transform: translateY(-1px);
}
.btn-lg {
  padding: 16px 44px;
  font-size: 16px;
}
.btn-sm {
  padding: 6px 18px;
  font-size: 13px;
}
.btn-accent {
  background: var(--accent);
  color: #ffffff;
  border: none;
}
.btn-accent:hover {
  background: #8F5F28;
  box-shadow: 0 4px 12px rgba(168, 117, 50, 0.3);
  transform: translateY(-1px);
}
.btn i { font-size: 15px; }

/* Hero */
.hero {
  position: relative;
  padding: 88px 0 72px;
  min-height: 85vh;
  display: flex;
  align-items: center;
  overflow: hidden;
  background-color: var(--bg);
}
.hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(31, 61, 43, 0.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(31, 61, 43, 0.05) 1px, transparent 1px);
  background-size: 48px 48px;
  mask-image: linear-gradient(135deg, rgba(0,0,0,0.6) 0%, transparent 60%);
  -webkit-mask-image: linear-gradient(135deg, rgba(0,0,0,0.6) 0%, transparent 60%);
  pointer-events: none;
}
.hero::after {
  content: '';
  position: absolute;
  top: -20%;
  right: -10%;
  width: 480px;
  height: 480px;
  background: radial-gradient(circle, rgba(31, 61, 43, 0.08) 0%, transparent 70%);
  pointer-events: none;
}
.hero-bg {
  position: absolute;
  inset: 0;
  background-image: url('/assets/images/backpic/back-1.webp');
  background-size: cover;
  background-position: center;
  opacity: 0.12;
  pointer-events: none;
}
.hero .container {
  position: relative;
  z-index: 2;
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 56px;
  align-items: center;
  width: 100%;
}
.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(31, 61, 43, 0.06);
  color: var(--brand);
  font-size: 13px;
  font-weight: 600;
  padding: 6px 16px;
  border-radius: var(--radius-full);
  margin-bottom: 24px;
  border: 1px solid rgba(31, 61, 43, 0.1);
}
.hero-badge i { font-size: 12px; color: var(--accent); }
.hero h1 {
  font-size: clamp(2rem, 5vw, 3.25rem);
  font-weight: 700;
  line-height: 1.15;
  letter-spacing: -0.01em;
  color: var(--text);
  margin-bottom: 16px;
}
.hero-sub {
  font-size: 17px;
  color: var(--brand);
  font-weight: 600;
  margin-bottom: 12px;
  letter-spacing: 0.02em;
}
.hero-desc {
  font-size: 16px;
  color: var(--text-body);
  line-height: 1.75;
  max-width: 520px;
  margin-bottom: 32px;
}
.hero-actions {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
  margin-bottom: 36px;
}
.hero-trust {
  display: flex;
  gap: 28px;
  flex-wrap: wrap;
}
.hero-trust-item {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  color: var(--text-muted);
}
.hero-trust-item i {
  color: var(--success);
  font-size: 15px;
}
.hero-visual {
  position: relative;
}
.hero-screen {
  position: relative;
  border-radius: 18px;
  overflow: hidden;
  box-shadow: var(--shadow-lg);
  border: 1px solid rgba(0, 0, 0, 0.06);
  transform: perspective(1200px) rotateY(-4deg) rotateX(1deg);
  transition: transform 0.3s ease;
}
.hero-screen:hover {
  transform: perspective(1200px) rotateY(0deg) rotateX(0deg);
}
.hero-screen img {
  width: 100%;
  border-radius: 18px;
}
.hero-screen-float {
  position: absolute;
  bottom: -16px;
  left: -16px;
  background: var(--bg);
  border-radius: 14px;
  box-shadow: var(--shadow-md);
  padding: 14px 18px;
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 13px;
  border: 1px solid rgba(0, 0, 0, 0.04);
}
.hero-screen-float i {
  color: var(--success);
  font-size: 18px;
}

/* 板块通用 */
.section-pad {
  padding: 76px 0;
}
.section-alt {
  background: var(--bg-alt);
}
.section-head {
  text-align: center;
  margin-bottom: 48px;
}
.section-head h2 {
  font-size: clamp(1.5rem, 3vw, 2.25rem);
  font-weight: 700;
  line-height: 1.25;
  margin-bottom: 10px;
  color: var(--text);
}
.section-head .section-dot {
  display: inline-block;
  width: 32px;
  height: 2px;
  background: var(--brand);
  border-radius: 2px;
  margin-bottom: 12px;
}
.section-head p {
  font-size: 15px;
  color: var(--text-muted);
  max-width: 560px;
  margin: 0 auto;
}
.section-head-left {
  text-align: left;
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  margin-bottom: 36px;
  gap: 16px;
  flex-wrap: wrap;
}
.section-head-left h2 {
  font-size: clamp(1.5rem, 3vw, 2rem);
  font-weight: 700;
  color: var(--text);
  display: flex;
  align-items: center;
  gap: 12px;
}
.section-head-left h2::before {
  content: '';
  width: 4px;
  height: 24px;
  background: var(--brand);
  border-radius: 4px;
}
.section-head-left p {
  color: var(--text-muted);
  font-size: 14px;
}
.section-head-left .view-all {
  color: var(--brand);
  font-weight: 500;
  font-size: 14px;
  display: inline-flex;
  align-items: center;
  gap: 6px;
}
.section-head-left .view-all:hover {
  text-decoration: underline;
}

/* 价值特性 */
.feature-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}
.feature-card {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px 22px;
  transition: all 0.25s ease-out;
  box-shadow: var(--shadow-sm);
  text-align: center;
}
.feature-card:hover {
  border-color: var(--brand);
  box-shadow: var(--shadow-md);
  transform: translateY(-4px);
}
.feature-icon {
  width: 56px;
  height: 56px;
  margin: 0 auto 16px;
  border-radius: 14px;
  background: rgba(31, 61, 43, 0.08);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--brand);
  font-size: 22px;
  transition: all 0.25s ease;
}
.feature-card:hover .feature-icon {
  background: var(--brand);
  color: #ffffff;
  transform: scale(1.05);
}
.feature-card h3 {
  font-size: 16px;
  font-weight: 600;
  color: var(--text);
  margin-bottom: 6px;
}
.feature-card p {
  font-size: 13px;
  color: var(--text-muted);
  line-height: 1.6;
}

/* 轮播 */
.carousel-wrap {
  position: relative;
  max-width: 980px;
  margin: 0 auto;
}
.carousel-viewport {
  overflow: hidden;
  border-radius: 18px;
  box-shadow: var(--shadow-lg);
  border: 1px solid rgba(0, 0, 0, 0.06);
}
.carousel-track {
  display: flex;
  transition: transform 0.4s ease-in-out;
}
.carousel-slide {
  min-width: 100%;
  flex-shrink: 0;
}
.carousel-slide img {
  width: 100%;
  height: auto;
  border-radius: 18px;
}
.carousel-btn {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  width: 46px;
  height: 46px;
  border-radius: 50%;
  background: var(--bg);
  border: 1px solid var(--border);
  box-shadow: var(--shadow-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text);
  font-size: 16px;
  transition: all 0.2s ease-out;
  z-index: 3;
}
.carousel-btn:hover {
  background: var(--brand);
  color: #ffffff;
  border-color: var(--brand);
}
.carousel-btn.prev { left: -12px; }
.carousel-btn.next { right: -12px; }
@media (max-width: 768px) {
  .carousel-btn.prev { left: 6px; }
  .carousel-btn.next { right: 6px; }
}
.carousel-dots {
  display: flex;
  justify-content: center;
  gap: 8px;
  margin-top: 20px;
}
.carousel-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--text-faint, #BDBDBD);
  border: none;
  padding: 0;
  transition: all 0.25s ease;
}
.carousel-dot.active {
  background: var(--brand);
  width: 28px;
  border-radius: 4px;
}
.carousel-tags {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 24px;
}
.carousel-tag {
  font-size: 13px;
  font-weight: 500;
  color: var(--text-body);
  background: var(--bg-alt);
  padding: 6px 16px;
  border-radius: var(--radius-full);
  border: 1px solid var(--border);
}

/* 系统要求 */
.requirements-wrap {
  max-width: 920px;
  margin: 0 auto;
  background: var(--bg);
  border-radius: var(--radius);
  border: 1px solid var(--border);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
}
.req-section {
  padding: 28px 32px;
}
.req-section + .req-section {
  border-top: 1px solid var(--border);
}
.req-section-title {
  font-size: 16px;
  font-weight: 600;
  color: var(--text);
  margin-bottom: 16px;
  display: flex;
  align-items: center;
  gap: 8px;
}
.req-section-title i {
  color: var(--brand);
  font-size: 17px;
}
.req-list {
  display: flex;
  flex-direction: column;
}
.req-item {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  padding: 10px 0;
  border-bottom: 1px solid rgba(0, 0, 0, 0.05);
  gap: 16px;
}
.req-item:last-child { border-bottom: none; }
.req-name {
  font-size: 14px;
  color: var(--text-muted);
  flex-shrink: 0;
  min-width: 90px;
}
.req-value {
  font-size: 14px;
  color: var(--text-body);
  text-align: right;
  font-weight: 500;
}

/* 评价墙 */
.review-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.review-card {
  background: var(--bg-alt);
  border-radius: var(--radius);
  padding: 28px 24px;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.03);
  transition: all 0.2s ease-out;
  border: 1px solid transparent;
}
.review-card:hover {
  border-color: rgba(31, 61, 43, 0.08);
  box-shadow: var(--shadow-sm);
}
.review-stars {
  color: var(--accent);
  font-size: 14px;
  margin-bottom: 12px;
  letter-spacing: 2px;
}
.review-text {
  font-size: 14px;
  color: var(--text-body);
  line-height: 1.7;
  margin-bottom: 16px;
}
.review-meta {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 13px;
  color: var(--text-muted);
}
.review-avatar {
  width: 34px;
  height: 34px;
  border-radius: 50%;
  background: var(--brand);
  color: #ffffff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 13px;
  font-weight: 600;
}
.review-env {
  font-size: 12px;
  color: var(--text-muted);
  background: var(--bg);
  padding: 2px 10px;
  border-radius: var(--radius-full);
  border: 1px solid var(--border);
}

/* 下载 CTA */
.download-zone {
  background: linear-gradient(135deg, var(--brand) 0%, var(--brand-dark) 100%);
  border-radius: 20px;
  padding: 56px 40px;
  text-align: center;
  position: relative;
  overflow: hidden;
  margin: 0 auto;
  max-width: 980px;
}
.download-zone::before {
  content: '';
  position: absolute;
  top: -60%;
  left: -30%;
  width: 320px;
  height: 320px;
  background: rgba(255, 255, 255, 0.04);
  border-radius: 50%;
}
.download-zone::after {
  content: '';
  position: absolute;
  bottom: -80%;
  right: -20%;
  width: 400px;
  height: 400px;
  background: rgba(168, 117, 50, 0.12);
  border-radius: 50%;
}
.download-zone h2 {
  color: #ffffff;
  font-size: clamp(1.5rem, 3vw, 2.1rem);
  font-weight: 700;
  margin-bottom: 8px;
  position: relative;
  z-index: 1;
}
.download-zone p {
  color: rgba(255, 255, 255, 0.72);
  font-size: 14px;
  margin-bottom: 28px;
  position: relative;
  z-index: 1;
}
.download-actions {
  display: flex;
  justify-content: center;
  gap: 16px;
  flex-wrap: wrap;
  position: relative;
  z-index: 1;
  margin-bottom: 20px;
}
.download-meta {
  color: rgba(255, 255, 255, 0.55);
  font-size: 13px;
  margin-bottom: 8px;
  position: relative;
  z-index: 1;
}
.download-secure {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  color: rgba(255, 255, 255, 0.75);
  font-size: 13px;
  position: relative;
  z-index: 1;
}
.download-secure i {
  color: #E8C99B;
  font-size: 16px;
}

/* 资讯卡片 */
.news-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.news-card {
  background: var(--bg);
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid var(--border);
  box-shadow: var(--shadow-sm);
  transition: all 0.25s ease-out;
  display: block;
}
.news-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
}
.news-card:hover .news-card-title {
  color: var(--brand);
}
.news-cover {
  position: relative;
  aspect-ratio: 16 / 9;
  overflow: hidden;
  background: var(--bg-deep);
}
.news-cover img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.3s ease;
}
.news-card:hover .news-cover img {
  transform: scale(1.03);
}
.news-tag {
  position: absolute;
  top: 12px;
  left: 12px;
  background: var(--brand);
  color: #ffffff;
  font-size: 11px;
  font-weight: 500;
  padding: 3px 12px;
  border-radius: var(--radius-full);
  border: none;
}
.news-body {
  padding: 20px;
}
.news-card-title {
  font-size: 16px;
  font-weight: 600;
  color: var(--text);
  line-height: 1.45;
  margin-bottom: 8px;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  transition: color 0.2s ease;
}
.news-desc {
  font-size: 13px;
  color: var(--text-muted);
  line-height: 1.6;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  margin-bottom: 12px;
}
.news-meta {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 12px;
  color: var(--text-faint, #BDBDBD);
  border-top: 1px solid rgba(0, 0, 0, 0.04);
  padding-top: 12px;
}
.news-meta .dot {
  width: 2px;
  height: 2px;
  border-radius: 50%;
  background: #ccc;
}
.empty-state {
  grid-column: 1 / -1;
  background: var(--bg-alt);
  border-radius: var(--radius);
  border: 1px dashed var(--border);
  padding: 56px 24px;
  text-align: center;
  color: var(--text-muted);
  font-size: 14px;
}
.empty-state i {
  font-size: 32px;
  color: var(--text-faint, #BDBDBD);
  margin-bottom: 12px;
  display: block;
}

/* FAQ */
.faq-wrap {
  max-width: 800px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 14px;
}
.faq-item {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  transition: all 0.25s ease-out;
}
.faq-item.open {
  border-color: rgba(31, 61, 43, 0.25);
  box-shadow: var(--shadow-sm);
}
.faq-question {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 20px 24px;
  background: transparent;
  border: none;
  font-size: 15px;
  font-weight: 600;
  color: var(--text);
  text-align: left;
  transition: color 0.2s ease;
}
.faq-question:hover { color: var(--brand); }
.faq-icon {
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background: var(--bg-alt);
  border: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--brand);
  font-size: 14px;
  flex-shrink: 0;
  transition: all 0.25s ease;
}
.faq-item.open .faq-icon {
  background: var(--brand);
  color: #ffffff;
  transform: rotate(45deg);
}
.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.3s ease-out;
}
.faq-answer-inner {
  padding: 0 24px 20px;
  font-size: 14px;
  color: var(--text-body);
  line-height: 1.75;
  border-top: 1px solid rgba(0, 0, 0, 0.05);
  padding-top: 16px;
}

/* 最终 CTA */
.final-cta {
  background-color: var(--bg-deep);
  background-image: url('/assets/images/backpic/back-3.png');
  background-size: cover;
  background-position: center;
  border-radius: 20px;
  padding: 60px 40px;
  text-align: center;
  position: relative;
  overflow: hidden;
  margin: 0 auto;
  max-width: 980px;
}
.final-cta::before {
  content: '';
  position: absolute;
  inset: 0;
  background: rgba(255, 255, 255, 0.82);
  border-radius: 20px;
}
.final-cta .final-inner {
  position: relative;
  z-index: 1;
}
.final-cta h2 {
  font-size: clamp(1.5rem, 3vw, 2.1rem);
  font-weight: 700;
  color: var(--text);
  margin-bottom: 10px;
}
.final-cta p {
  color: var(--text-muted);
  font-size: 15px;
  margin-bottom: 28px;
}

/* 页脚 */
.site-footer {
  background: #141A16;
  color: rgba(255, 255, 255, 0.72);
  padding: 56px 0 0;
}
.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 40px;
  padding-bottom: 40px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}
.footer-brand .brand-name {
  color: #ffffff;
  margin-bottom: 10px;
}
.footer-brand .brand-sub {
  color: rgba(255, 255, 255, 0.5);
  font-size: 13px;
  margin-bottom: 16px;
}
.footer-brand p {
  font-size: 13px;
  color: rgba(255, 255, 255, 0.5);
  line-height: 1.7;
  max-width: 280px;
}
.footer-col h4 {
  color: #ffffff;
  font-size: 15px;
  font-weight: 600;
  margin-bottom: 16px;
}
.footer-col ul li {
  margin-bottom: 8px;
}
.footer-col ul li a {
  font-size: 13px;
  color: rgba(255, 255, 255, 0.55);
  transition: all 0.2s ease;
}
.footer-col ul li a:hover {
  color: #E8C99B;
  padding-left: 4px;
}
.footer-bottom {
  padding: 20px 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
  font-size: 12px;
  color: rgba(255, 255, 255, 0.4);
}
.footer-bottom .icp {
  font-size: 12px;
}

/* 汉堡菜单 */
.hamburger {
  display: none;
  width: 40px;
  height: 40px;
  border-radius: 10px;
  border: 1px solid var(--border);
  background: var(--bg);
  align-items: center;
  justify-content: center;
  font-size: 18px;
  color: var(--text);
}
.mobile-drawer {
  position: fixed;
  top: 0;
  right: 0;
  width: 300px;
  height: 100vh;
  background: var(--bg);
  z-index: 100;
  padding: 80px 24px 24px;
  transform: translateX(100%);
  transition: transform 0.3s ease;
  box-shadow: -12px 0 40px rgba(0, 0, 0, 0.12);
  overflow-y: auto;
}
.mobile-drawer.open {
  transform: translateX(0);
}
.mobile-drawer-close {
  position: absolute;
  top: 16px;
  right: 16px;
  width: 36px;
  height: 36px;
  border-radius: 10px;
  border: 1px solid var(--border);
  background: var(--bg);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 16px;
  color: var(--text);
}
.mobile-drawer nav {
  display: flex;
  flex-direction: column;
  gap: 4px;
}
.mobile-drawer nav a {
  padding: 14px 16px;
  font-size: 15px;
  font-weight: 500;
  color: var(--text);
  border-radius: var(--radius);
  transition: all 0.2s ease;
}
.mobile-drawer nav a:hover,
.mobile-drawer nav a.active {
  background: rgba(31, 61, 43, 0.06);
  color: var(--brand);
}
.mobile-drawer .drawer-actions {
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin-top: 24px;
  padding-top: 20px;
  border-top: 1px solid var(--border);
}
.mobile-drawer .btn {
  justify-content: center;
}
.drawer-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.4);
  z-index: 90;
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.3s ease;
}
.drawer-overlay.active {
  opacity: 1;
  visibility: visible;
}
body.drawer-lock {
  overflow: hidden;
}

/* 响应式断点 */
@media (max-width: 1024px) {
  .nav-menu { display: none; }
  .nav-actions .btn-outline { display: none; }
  .hamburger { display: flex; }
  .feature-grid { grid-template-columns: repeat(2, 1fr); }
  .news-grid { grid-template-columns: repeat(2, 1fr); }
  .review-grid { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .hero .container { grid-template-columns: 1fr; gap: 40px; }
  .hero { padding-top: 64px; }
  .hero-visual { max-width: 520px; margin: 0 auto; }
}
@media (max-width: 768px) {
  .topbar .container { justify-content: space-between; }
  .topbar-safe span { display: none; }
  .section-pad { padding: 56px 0; }
  .feature-grid { grid-template-columns: repeat(2, 1fr); gap: 14px; }
  .news-grid { grid-template-columns: 1fr; }
  .review-grid { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr 1fr; gap: 24px; }
  .download-zone { padding: 40px 24px; }
  .final-cta { padding: 40px 24px; }
}
@media (max-width: 640px) {
  .nav-actions .btn-primary { padding: 8px 18px; font-size: 14px; }
  .hero-actions { flex-direction: column; }
  .hero-actions .btn { width: 100%; justify-content: center; }
  .hero-trust { gap: 16px; }
  .feature-grid { grid-template-columns: 1fr 1fr; gap: 12px; }
  .feature-card { padding: 22px 16px; }
  .feature-card h3 { font-size: 15px; }
  .footer-grid { grid-template-columns: 1fr; }
  .footer-bottom { flex-direction: column; text-align: center; }
  .review-grid { grid-template-columns: 1fr; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    transition: none !important;
    animation: none !important;
  }
}

a:focus-visible, button:focus-visible {
  outline: 2px solid var(--brand);
  outline-offset: 2px;
}

/* roulang page: category1 */
:root {
      --primary: #1F3D2B;
      --primary-dark: #172E20;
      --primary-light: #2D5B3F;
      --accent: #A87532;
      --bg-white: #FFFFFF;
      --bg-gray: #F6F6F4;
      --bg-deep: #F1F1EF;
      --text-main: #171717;
      --text-body: #3D3D3D;
      --text-light: #8A8A8E;
      --text-muted: #BDBDBD;
      --border: rgba(0, 0, 0, 0.06);
      --radius: 12px;
      --radius-sm: 8px;
      --shadow: 0 1px 2px rgba(0, 0, 0, 0.04), 0 2px 8px rgba(0, 0, 0, 0.04);
      --shadow-hover: 0 8px 20px rgba(0, 0, 0, 0.08), 0 2px 6px rgba(0, 0, 0, 0.05);
      --transition: all 0.2s ease-out;
    }
    * {
      margin: 0;
      padding: 0;
      box-sizing: border-box;
    }
    html {
      font-family: system-ui, -apple-system, "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
      color: var(--text-main);
      background: var(--bg-white);
      line-height: 1.6;
      -webkit-font-smoothing: antialiased;
    }
    body {
      background: var(--bg-white);
      font-size: 1rem;
      color: var(--text-body);
    }
    a {
      color: inherit;
      text-decoration: none;
      transition: var(--transition);
    }
    img {
      max-width: 100%;
      height: auto;
      display: block;
    }
    button {
      font-family: inherit;
      cursor: pointer;
    }
    a:focus-visible,
    button:focus-visible {
      outline: 2px solid var(--primary);
      outline-offset: 2px;
      border-radius: 4px;
    }
    .container {
      width: 100%;
      max-width: 1200px;
      margin: 0 auto;
      padding-left: 16px;
      padding-right: 16px;
    }
    @media (min-width: 768px) {
      .container {
        padding-left: 24px;
        padding-right: 24px;
      }
    }

    /* ===== Topbar ===== */
    .topbar {
      background: var(--primary-dark);
      color: rgba(255, 255, 255, 0.85);
      font-size: 12px;
      height: 36px;
      line-height: 36px;
    }
    .topbar-inner {
      display: flex;
      align-items: center;
      gap: 16px;
      height: 36px;
    }
    .topbar-domain {
      background: rgba(255, 255, 255, 0.1);
      border-radius: 4px;
      padding: 2px 10px;
      font-weight: 500;
      letter-spacing: 0.02em;
      white-space: nowrap;
    }
    .topbar-tip {
      color: #D6E0D8;
    }
    .topbar-action {
      margin-left: auto;
      color: #F0D9B8;
      font-weight: 500;
      border-bottom: 1px solid rgba(240, 217, 184, 0.4);
      padding-bottom: 1px;
      white-space: nowrap;
    }
    .topbar-action:hover {
      color: #fff;
      border-color: #fff;
    }
    @media (max-width: 640px) {
      .topbar-action {
        display: none;
      }
    }

    /* ===== Main Nav ===== */
    .main-nav-wrap {
      position: sticky;
      top: 0;
      z-index: 50;
      background: rgba(255, 255, 255, 0.95);
      backdrop-filter: blur(8px);
      -webkit-backdrop-filter: blur(8px);
      border-bottom: 1px solid var(--border);
      transition: box-shadow 0.2s ease;
    }
    .main-nav-wrap.scrolled {
      box-shadow: 0 4px 16px rgba(0, 0, 0, 0.04);
    }
    .main-nav {
      display: flex;
      flex-wrap: wrap;
      align-items: center;
      gap: 16px;
      min-height: 68px;
    }
    .brand {
      display: flex;
      align-items: center;
      gap: 10px;
      margin-right: auto;
      flex-shrink: 0;
    }
    .brand-logo {
      width: 32px;
      height: 32px;
      border-radius: 8px;
      background: var(--primary);
      color: #fff;
      font-size: 18px;
      font-weight: 700;
      display: flex;
      align-items: center;
      justify-content: center;
    }
    .brand-text {
      display: flex;
      flex-direction: column;
      line-height: 1.2;
    }
    .brand-name {
      font-size: 17px;
      font-weight: 700;
      color: var(--text-main);
      letter-spacing: 0.01em;
    }
    .brand-sub {
      font-size: 11px;
      color: var(--text-light);
      letter-spacing: 0.04em;
    }
    .nav-menu {
      display: flex;
      align-items: center;
      gap: 28px;
    }
    .nav-link {
      position: relative;
      font-size: 15px;
      font-weight: 500;
      color: var(--text-body);
      padding: 8px 2px;
      white-space: nowrap;
    }
    .nav-link::after {
      content: '';
      position: absolute;
      left: 0;
      bottom: 2px;
      width: 0;
      height: 2px;
      border-radius: 2px;
      background: var(--primary);
      transition: width 0.25s ease;
    }
    .nav-link:hover {
      color: var(--primary);
    }
    .nav-link:hover::after {
      width: 100%;
    }
    .nav-link.active {
      color: var(--primary);
      font-weight: 600;
    }
    .nav-link.active::after {
      width: 100%;
    }
    .nav-actions {
      display: flex;
      align-items: center;
      gap: 10px;
      flex-shrink: 0;
    }
    .mobile-toggle {
      display: none;
      flex-direction: column;
      justify-content: center;
      gap: 5px;
      width: 40px;
      height: 40px;
      border: 1px solid var(--border);
      border-radius: 8px;
      background: var(--bg-white);
      padding: 8px;
      flex-shrink: 0;
    }
    .mobile-toggle span {
      display: block;
      height: 2px;
      background: var(--text-main);
      border-radius: 2px;
      transition: var(--transition);
    }
    .mobile-toggle.active span:nth-child(1) {
      transform: translateY(7px) rotate(45deg);
    }
    .mobile-toggle.active span:nth-child(2) {
      opacity: 0;
    }
    .mobile-toggle.active span:nth-child(3) {
      transform: translateY(-7px) rotate(-45deg);
    }
    @media (max-width: 1023px) {
      .mobile-toggle {
        display: flex;
      }
      .nav-menu {
        display: none;
        width: 100%;
        flex-direction: column;
        gap: 0;
        padding: 8px 0 12px;
      }
      .nav-menu.open {
        display: flex;
      }
      .nav-link {
        width: 100%;
        text-align: left;
        font-size: 15px;
        padding: 12px 0;
        border-bottom: 1px solid var(--border);
      }
      .nav-link::after {
        display: none;
      }
      .nav-actions {
        display: none;
        width: 100%;
        flex-direction: row;
        padding: 12px 0 4px;
        gap: 10px;
      }
      .nav-actions.open {
        display: flex;
      }
    }

    /* ===== Buttons ===== */
    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 8px;
      border-radius: 999px;
      font-weight: 500;
      font-size: 15px;
      line-height: 1;
      padding: 14px 28px;
      transition: var(--transition);
      white-space: nowrap;
      border: 1px solid transparent;
    }
    .btn-primary {
      background: var(--primary);
      color: #fff;
      box-shadow: 0 2px 6px rgba(31, 61, 43, 0.2);
    }
    .btn-primary:hover {
      background: var(--primary-dark);
      transform: translateY(-1px);
      box-shadow: 0 4px 12px rgba(31, 61, 43, 0.25);
    }
    .btn-outline {
      background: var(--bg-white);
      border-color: var(--primary);
      color: var(--primary);
    }
    .btn-outline:hover {
      background: rgba(31, 61, 43, 0.05);
      transform: translateY(-1px);
      box-shadow: 0 4px 12px rgba(31, 61, 43, 0.1);
    }
    .btn-sm {
      padding: 10px 20px;
      font-size: 14px;
    }
    .btn-lg {
      padding: 18px 40px;
      font-size: 16px;
    }
    .btn-block {
      width: 100%;
    }
    .btn svg {
      width: 18px;
      height: 18px;
    }

    /* ===== Page Hero ===== */
    .page-hero {
      background:
        radial-gradient(circle at 80% 20%, rgba(168, 117, 50, 0.08), transparent 40%),
        radial-gradient(circle at 10% 80%, rgba(31, 61, 43, 0.05), transparent 40%),
        var(--bg-gray);
      border-bottom: 1px solid var(--border);
      padding: 72px 0 56px;
    }
    .page-hero-inner {
      text-align: center;
      max-width: 760px;
    }
    .breadcrumb {
      display: flex;
      justify-content: center;
      align-items: center;
      gap: 8px;
      font-size: 14px;
      color: var(--text-light);
      margin-bottom: 24px;
    }
    .breadcrumb a {
      color: var(--text-light);
    }
    .breadcrumb a:hover {
      color: var(--primary);
    }
    .breadcrumb .sep {
      color: var(--text-muted);
    }
    .breadcrumb .current {
      color: var(--primary);
      font-weight: 500;
    }
    .page-hero h1 {
      font-size: clamp(2rem, 5vw, 3.25rem);
      font-weight: 700;
      line-height: 1.15;
      letter-spacing: -0.01em;
      color: var(--text-main);
      margin-bottom: 16px;
    }
    .page-hero p {
      font-size: 17px;
      color: var(--text-light);
      line-height: 1.7;
      max-width: 640px;
      margin: 0 auto;
    }

    /* ===== Content Section ===== */
    .section {
      padding: 72px 0;
    }
    .section-gray {
      background: var(--bg-gray);
    }
    .section-heading {
      text-align: center;
      max-width: 640px;
      margin: 0 auto 48px;
    }
    .section-heading h2 {
      font-size: clamp(1.5rem, 3vw, 2.25rem);
      font-weight: 700;
      color: var(--text-main);
      line-height: 1.25;
      margin-bottom: 10px;
      position: relative;
    }
    .section-heading h2::after {
      content: '';
      display: block;
      width: 32px;
      height: 2px;
      border-radius: 2px;
      background: var(--primary);
      margin: 14px auto 0;
    }
    .section-heading p {
      color: var(--text-light);
      font-size: 15px;
      margin-top: 12px;
    }
    .content-grid {
      display: grid;
      grid-template-columns: 1fr;
      gap: 40px;
    }
    @media (min-width: 1024px) {
      .content-grid {
        grid-template-columns: 2fr 1fr;
        gap: 48px;
      }
    }
    .content-main {
      min-width: 0;
    }
    .content-main .lead {
      font-size: 17px;
      color: var(--text-body);
      line-height: 1.85;
      margin-bottom: 24px;
    }
    .content-main h3 {
      font-size: 20px;
      font-weight: 600;
      color: var(--text-main);
      margin: 32px 0 12px;
      position: relative;
      padding-left: 12px;
    }
    .content-main h3::before {
      content: '';
      position: absolute;
      left: 0;
      top: 6px;
      bottom: 6px;
      width: 3px;
      border-radius: 2px;
      background: var(--primary);
    }
    .content-main p {
      color: var(--text-body);
      line-height: 1.8;
      margin-bottom: 16px;
    }
    .content-img {
      border-radius: 12px;
      border: 1px solid var(--border);
      margin: 24px 0;
      width: 100%;
      box-shadow: var(--shadow);
    }
    .styled-list {
      margin: 16px 0 20px;
      padding-left: 0;
      list-style: none;
      counter-reset: custom;
      display: grid;
      gap: 12px;
    }
    .styled-list li {
      counter-increment: custom;
      display: flex;
      gap: 12px;
      align-items: flex-start;
      line-height: 1.7;
      color: var(--text-body);
    }
    .styled-list li::before {
      content: counter(custom, decimal-leading-zero);
      font-weight: 600;
      color: var(--primary);
      background: rgba(31, 61, 43, 0.08);
      border-radius: 6px;
      font-size: 13px;
      padding: 2px 8px;
      flex-shrink: 0;
      margin-top: 2px;
    }

    /* ===== Sidebar ===== */
    .content-side {
      display: grid;
      gap: 24px;
      align-content: start;
    }
    .side-card {
      background: var(--bg-gray);
      border-radius: 12px;
      padding: 24px;
      border: 1px solid var(--border);
    }
    .side-card h4 {
      font-size: 16px;
      font-weight: 600;
      color: var(--text-main);
      margin-bottom: 10px;
    }
    .side-card p {
      font-size: 14px;
      color: var(--text-light);
      line-height: 1.65;
      margin-bottom: 16px;
    }
    .side-card .btn {
      margin-top: 4px;
    }
    .spec-list {
      display: grid;
      gap: 12px;
    }
    .spec-list dt {
      font-size: 13px;
      color: var(--text-light);
      font-weight: 500;
    }
    .spec-list dd {
      font-size: 14px;
      color: var(--text-body);
      line-height: 1.55;
      margin-top: 2px;
    }
    .side-links {
      list-style: none;
      display: grid;
      gap: 10px;
    }
    .side-links a {
      display: inline-flex;
      align-items: center;
      gap: 6px;
      font-size: 14px;
      color: var(--primary);
    }
    .side-links a::before {
      content: '';
      width: 6px;
      height: 6px;
      border-radius: 50%;
      background: var(--accent);
      flex-shrink: 0;
    }
    .side-links a:hover {
      color: var(--primary-dark);
      text-decoration: underline;
    }

    /* ===== Index List ===== */
    .index-list {
      border-top: 1px solid rgba(0, 0, 0, 0.08);
    }
    .index-item {
      display: flex;
      gap: 24px;
      align-items: flex-start;
      padding: 24px 0;
      border-bottom: 1px solid rgba(0, 0, 0, 0.08);
      transition: var(--transition);
    }
    .index-item:hover {
      background: var(--bg-gray);
      padding-left: 12px;
      padding-right: 12px;
      border-radius: 8px;
    }
    .index-num {
      font-size: 24px;
      font-weight: 700;
      color: var(--text-muted);
      width: 48px;
      flex-shrink: 0;
      line-height: 1.2;
    }
    .index-body h3 {
      font-size: 17px;
      font-weight: 600;
      color: var(--text-main);
      margin-bottom: 6px;
    }
    .index-body h3 a {
      color: inherit;
    }
    .index-body h3 a:hover {
      color: var(--primary);
    }
    .index-body p {
      font-size: 14px;
      color: var(--text-light);
      line-height: 1.6;
      margin-bottom: 8px;
    }
    .index-meta {
      font-size: 13px;
      color: var(--text-muted);
    }

    /* ===== FAQ ===== */
    .faq-list {
      max-width: 800px;
      margin: 0 auto;
      display: grid;
      gap: 16px;
    }
    .faq-item {
      background: var(--bg-white);
      border: 1px solid var(--border);
      border-radius: 12px;
      overflow: hidden;
      transition: var(--transition);
    }
    .faq-item:hover {
      border-color: rgba(31, 61, 43, 0.2);
    }
    .faq-question {
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 16px;
      padding: 20px 24px;
      cursor: pointer;
      font-size: 16px;
      font-weight: 500;
      color: var(--text-main);
    }
    .faq-icon {
      width: 24px;
      height: 24px;
      border: 1px solid var(--border);
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 18px;
      font-weight: 400;
      color: var(--primary);
      flex-shrink: 0;
      transition: transform 0.25s ease, background 0.25s ease;
    }
    .faq-answer {
      display: none;
      padding: 0 24px 20px;
      color: var(--text-body);
      font-size: 15px;
      line-height: 1.75;
      border-top: 1px solid var(--border);
      padding-top: 16px;
      margin-top: 0;
    }
    .faq-item.active .faq-icon {
      transform: rotate(45deg);
      background: var(--primary);
      border-color: var(--primary);
      color: #fff;
    }

    /* ===== CTA ===== */
    .cta-section {
      background:
        linear-gradient(rgba(255, 255, 255, 0.92), rgba(255, 255, 255, 0.92)),
        url('/assets/images/backpic/back-1.webp') center/cover no-repeat;
      text-align: center;
      padding: 88px 0;
      border-top: 1px solid var(--border);
    }
    .cta-section h2 {
      font-size: clamp(1.75rem, 3.5vw, 2.5rem);
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 20px;
    }
    .cta-actions {
      display: flex;
      flex-wrap: wrap;
      justify-content: center;
      gap: 16px;
      margin-bottom: 20px;
    }
    .cta-tip {
      font-size: 14px;
      color: var(--text-light);
      display: inline-flex;
      align-items: center;
      gap: 8px;
    }
    .cta-tip::before {
      content: '✓';
      display: inline-flex;
      align-items: center;
      justify-content: center;
      width: 20px;
      height: 20px;
      border-radius: 50%;
      background: rgba(45, 125, 91, 0.12);
      color: #2D7D5B;
      font-size: 12px;
    }

    /* ===== Footer ===== */
    .site-footer {
      background: #111411;
      color: rgba(255, 255, 255, 0.7);
      padding: 64px 0 0;
      font-size: 14px;
    }
    .footer-grid {
      display: grid;
      grid-template-columns: 1fr;
      gap: 40px;
      padding-bottom: 48px;
    }
    @media (min-width: 768px) {
      .footer-grid {
        grid-template-columns: 2fr 1fr 1fr 1fr;
        gap: 32px;
      }
    }
    .footer-brand .brand {
      margin-bottom: 16px;
    }
    .footer-brand .brand-logo {
      background: var(--accent);
      color: #fff;
    }
    .footer-brand .brand-name {
      color: #fff;
    }
    .footer-brand .brand-sub {
      color: rgba(255, 255, 255, 0.5);
    }
    .footer-brand p {
      font-size: 14px;
      line-height: 1.7;
      color: rgba(255, 255, 255, 0.55);
      max-width: 280px;
    }
    .footer-col h4 {
      font-size: 15px;
      font-weight: 600;
      color: #fff;
      margin-bottom: 16px;
    }
    .footer-col ul {
      list-style: none;
      display: grid;
      gap: 10px;
    }
    .footer-col a {
      color: rgba(255, 255, 255, 0.55);
      font-size: 14px;
      transition: var(--transition);
    }
    .footer-col a:hover {
      color: #fff;
      text-decoration: underline;
      text-underline-offset: 4px;
    }
    .footer-bottom {
      border-top: 1px solid rgba(255, 255, 255, 0.08);
      padding: 20px 0;
      display: flex;
      flex-wrap: wrap;
      justify-content: space-between;
      align-items: center;
      gap: 12px;
      font-size: 13px;
      color: rgba(255, 255, 255, 0.4);
    }
    .icp {
      color: rgba(255, 255, 255, 0.3);
    }

    /* ===== Focus / Reduced Motion ===== */
    @media (prefers-reduced-motion: reduce) {
      *,
      *::before,
      *::after {
        animation-duration: 0.01ms !important;
        transition-duration: 0.01ms !important;
      }
    }

/* roulang page: article */
:root {
  --primary: #1F3D2B;
  --primary-dark: #172E20;
  --accent: #A87532;
  --page-bg: #FFFFFF;
  --surface-1: #F6F6F4;
  --surface-2: #F1F1EF;
  --text-title: #171717;
  --text-body: #3D3D3D;
  --text-muted: #8A8A8E;
  --text-dim: #BDBDBD;
  --radius: 12px;
  --radius-sm: 8px;
  --shadow-sm: 0 1px 2px rgba(0,0,0,0.04), 0 2px 8px rgba(0,0,0,0.04);
  --shadow-hover: 0 8px 20px rgba(0,0,0,0.08), 0 2px 6px rgba(0,0,0,0.05);
  --shadow-btn: 0 4px 12px rgba(31,61,43,0.25);
  --font-main: system-ui, -apple-system, "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
}
* {
  box-sizing: border-box;
}
html {
  scroll-behavior: auto;
}
body {
  margin: 0;
  font-family: var(--font-main);
  font-size: 1rem;
  line-height: 1.8;
  color: var(--text-body);
  background: var(--page-bg);
  -webkit-font-smoothing: antialiased;
}
img {
  max-width: 100%;
  height: auto;
  display: block;
}
a {
  color: inherit;
  text-decoration: none;
  transition: color 0.2s ease;
}
button {
  font-family: inherit;
  cursor: pointer;
}
ul, ol {
  margin: 0;
  padding: 0;
  list-style: none;
}
a:focus-visible,
button:focus-visible {
  outline: 2px solid var(--primary);
  outline-offset: 2px;
  border-radius: 4px;
}
.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding-left: 16px;
  padding-right: 16px;
}
@media (min-width: 768px) {
  .container {
    padding-left: 24px;
    padding-right: 24px;
  }
}
/* ===== Header ===== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid rgba(0, 0, 0, 0.06);
  transition: box-shadow 0.2s ease;
}
.site-header.scrolled {
  box-shadow: 0 1px 12px rgba(0, 0, 0, 0.05);
}
.topbar {
  background: var(--primary-dark);
  color: rgba(255, 255, 255, 0.88);
  font-size: 0.8125rem;
  height: 38px;
  display: flex;
  align-items: center;
}
.topbar-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}
.topbar-domain {
  font-weight: 600;
  letter-spacing: 0.02em;
  color: #cfd9cf;
}
.topbar-safety {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  color: rgba(255, 255, 255, 0.75);
  font-size: 12px;
}
.topbar-safety svg {
  width: 14px;
  height: 14px;
  stroke: var(--accent);
}
.topbar-action {
  color: #fff;
  font-weight: 600;
  font-size: 12px;
  padding: 4px 12px;
  border: 1px solid rgba(255, 255, 255, 0.3);
  border-radius: 99px;
  transition: background 0.2s, border-color 0.2s;
}
.topbar-action:hover {
  background: rgba(255, 255, 255, 0.12);
  border-color: rgba(255, 255, 255, 0.6);
}
@media (max-width: 767px) {
  .topbar-action {
    display: none;
  }
}
.main-nav {
  border-bottom: 1px solid rgba(0, 0, 0, 0.04);
}
.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
  gap: 20px;
}
.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
}
.brand-logo {
  width: 36px;
  height: 36px;
  border-radius: 10px;
  background: linear-gradient(135deg, var(--primary), var(--primary-dark));
  color: #fff;
  font-size: 20px;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
  letter-spacing: 0;
  box-shadow: 0 4px 12px rgba(31, 61, 43, 0.2);
}
.brand-text {
  display: flex;
  flex-direction: column;
  line-height: 1.2;
}
.brand-name {
  font-size: 17px;
  font-weight: 700;
  color: var(--text-title);
  letter-spacing: 0.02em;
}
.brand-sub {
  font-size: 12px;
  color: var(--text-muted);
  letter-spacing: 0.04em;
}
.nav-menu {
  display: none;
  align-items: center;
  gap: 32px;
}
@media (min-width: 1024px) {
  .nav-menu {
    display: flex;
  }
}
.nav-link {
  position: relative;
  font-size: 0.9375rem;
  font-weight: 500;
  color: var(--text-body);
  padding: 8px 2px;
  transition: color 0.2s;
}
.nav-link::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 100%;
  height: 2px;
  border-radius: 2px;
  background: var(--primary);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.25s ease;
}
.nav-link:hover {
  color: var(--primary);
}
.nav-link:hover::after {
  transform: scaleX(1);
}
.nav-link.active {
  color: var(--primary);
  font-weight: 600;
}
.nav-link.active::after {
  transform: scaleX(1);
}
.nav-actions {
  display: none;
  align-items: center;
  gap: 12px;
  flex-shrink: 0;
}
@media (min-width: 1024px) {
  .nav-actions {
    display: flex;
  }
}
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-weight: 600;
  border-radius: 99px;
  transition: transform 0.2s ease, box-shadow 0.2s ease, background 0.2s ease, border-color 0.2s;
  line-height: 1.5;
  white-space: nowrap;
}
.btn-primary {
  background: var(--primary);
  color: #fff;
  box-shadow: 0 1px 2px rgba(0, 0, 0, 0.08);
}
.btn-primary:hover {
  background: var(--primary-dark);
  transform: translateY(-1px);
  box-shadow: var(--shadow-btn);
}
.btn-outline {
  background: rgba(31, 61, 43, 0.04);
  color: var(--primary);
  border: 1px solid rgba(31, 61, 43, 0.35);
}
.btn-outline:hover {
  background: rgba(31, 61, 43, 0.08);
  transform: translateY(-1px);
  border-color: var(--primary);
}
.btn-lg {
  padding: 16px 44px;
  font-size: 1rem;
}
.btn-md {
  padding: 12px 28px;
  font-size: 0.9375rem;
}
.btn-sm {
  padding: 8px 20px;
  font-size: 0.875rem;
}
.hamburger {
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 42px;
  height: 42px;
  padding: 10px;
  background: transparent;
  border: 1px solid rgba(0, 0, 0, 0.08);
  border-radius: 10px;
  transition: background 0.2s;
}
.hamburger:hover {
  background: var(--surface-1);
}
.hamburger span {
  display: block;
  height: 2px;
  width: 100%;
  background: var(--text-title);
  border-radius: 2px;
  transition: transform 0.3s, opacity 0.3s;
}
.hamburger.active span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}
.hamburger.active span:nth-child(2) {
  opacity: 0;
}
.hamburger.active span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}
@media (min-width: 1024px) {
  .hamburger {
    display: none;
  }
}
.mobile-menu {
  position: fixed;
  top: 0;
  right: -320px;
  width: 300px;
  height: 100vh;
  background: #fff;
  z-index: 100;
  padding: 96px 28px 40px;
  box-shadow: 0 12px 40px rgba(0, 0, 0, 0.16);
  transition: right 0.3s ease;
  overflow-y: auto;
}
.mobile-menu.open {
  right: 0;
}
.mobile-menu .nav-menu {
  display: flex;
  flex-direction: column;
  gap: 20px;
  align-items: flex-start;
  padding: 0;
}
.mobile-menu .nav-link {
  font-size: 1.0625rem;
}
.mobile-menu .nav-actions {
  display: flex;
  flex-direction: column;
  align-items: stretch;
  gap: 12px;
  margin-top: 40px;
  width: 100%;
}
.mobile-menu .nav-actions .btn {
  width: 100%;
}
.mobile-close {
  position: absolute;
  top: 24px;
  right: 24px;
  width: 40px;
  height: 40px;
  border: 1px solid rgba(0, 0, 0, 0.08);
  border-radius: 10px;
  background: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 22px;
  color: var(--text-title);
}
.mobile-close:hover {
  background: var(--surface-1);
}
@media (min-width: 1024px) {
  .mobile-menu {
    display: none;
  }
}
body.lock-scroll {
  overflow: hidden;
}
.menu-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.35);
  z-index: 90;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.3s;
}
.menu-overlay.show {
  opacity: 1;
  pointer-events: auto;
}
/* ===== Article header ===== */
.article-header {
  background: var(--surface-1);
  border-bottom: 1px solid rgba(0, 0, 0, 0.04);
  padding: 48px 0 40px;
}
.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  font-size: 0.875rem;
  color: var(--text-muted);
  margin-bottom: 20px;
}
.breadcrumb a {
  color: var(--text-muted);
  transition: color 0.2s;
}
.breadcrumb a:hover {
  color: var(--primary);
}
.breadcrumb-sep {
  color: var(--text-dim);
}
.breadcrumb-current {
  color: var(--primary);
  font-weight: 500;
  max-width: 240px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.article-header h1 {
  font-size: clamp(1.6rem, 3.5vw, 2.4rem);
  font-weight: 700;
  line-height: 1.28;
  color: var(--text-title);
  letter-spacing: -0.01em;
  margin: 0 0 18px;
  max-width: 860px;
}
.article-meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
  font-size: 0.875rem;
  color: var(--text-muted);
}
.meta-item {
  display: inline-flex;
  align-items: center;
  gap: 6px;
}
.meta-dot {
  color: var(--text-dim);
}
.meta-cate {
  color: var(--primary);
  font-weight: 600;
  background: rgba(31, 61, 43, 0.08);
  padding: 3px 12px;
  border-radius: 99px;
  font-size: 0.8125rem;
}
/* ===== Article content ===== */
.article-section {
  padding: 56px 0 32px;
  background: #fff;
}
.article-container {
  max-width: 720px;
  margin: 0 auto;
}
.article-content {
  font-size: 1.0625rem;
  line-height: 1.85;
  color: var(--text-body);
}
.article-content p {
  margin: 0 0 1.35em;
}
.article-content h2,
.article-content h3,
.article-content h4,
.article-content h5 {
  color: var(--text-title);
  font-weight: 700;
  line-height: 1.35;
  margin: 1.8em 0 0.7em;
}
.article-content h2 {
  font-size: 1.45rem;
}
.article-content h3 {
  font-size: 1.25rem;
  border-left: 4px solid var(--primary);
  padding-left: 12px;
}
.article-content h4 {
  font-size: 1.1rem;
}
.article-content h5 {
  font-size: 1rem;
}
.article-content ul,
.article-content ol {
  padding-left: 24px;
  margin: 0 0 1.35em;
}
.article-content ul {
  list-style: disc;
}
.article-content ol {
  list-style: decimal;
}
.article-content li {
  margin-bottom: 0.5em;
}
.article-content img {
  width: 100%;
  border-radius: var(--radius);
  margin: 1.5em 0;
  border: 1px solid rgba(0, 0, 0, 0.05);
  box-shadow: var(--shadow-sm);
}
.article-content blockquote {
  border-left: 4px solid var(--primary);
  background: rgba(31, 61, 43, 0.04);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  padding: 18px 22px;
  margin: 1.5em 0;
  color: var(--text-muted);
}
.article-content blockquote p {
  margin-bottom: 0;
}
.article-content pre {
  background: #1c1c1c;
  color: #e5e5e5;
  border-radius: var(--radius-sm);
  padding: 20px;
  overflow-x: auto;
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
  font-size: 0.9rem;
  line-height: 1.6;
  margin: 1.5em 0;
}
.article-content code {
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
  font-size: 0.9em;
  background: rgba(0, 0, 0, 0.06);
  padding: 2px 6px;
  border-radius: 4px;
}
.article-content pre code {
  background: transparent;
  padding: 0;
}
.article-content a {
  color: var(--primary);
  border-bottom: 1px solid rgba(31, 61, 43, 0.25);
}
.article-content a:hover {
  border-bottom-color: var(--primary);
}
.not-found {
  text-align: center;
  padding: 64px 24px;
  background: var(--surface-1);
  border-radius: var(--radius);
}
.not-found-icon {
  width: 72px;
  height: 72px;
  margin: 0 auto 20px;
  border-radius: 50%;
  background: rgba(31, 61, 43, 0.06);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--primary);
}
.not-found h2 {
  font-size: 1.5rem;
  color: var(--text-title);
  margin: 0 0 12px;
}
.not-found p {
  color: var(--text-muted);
  margin: 0 0 28px;
}
/* ===== Article tags ===== */
.article-tags-section {
  padding: 24px 0 48px;
  background: #fff;
}
.tags-inner {
  max-width: 720px;
  margin: 0 auto;
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  padding-top: 20px;
  border-top: 1px solid rgba(0, 0, 0, 0.06);
}
.tag {
  display: inline-flex;
  align-items: center;
  padding: 5px 16px;
  border-radius: 99px;
  background: var(--surface-1);
  border: 1px solid rgba(0, 0, 0, 0.05);
  font-size: 0.8125rem;
  color: var(--text-muted);
  transition: background 0.2s, color 0.2s;
}
.tag:hover {
  background: var(--primary);
  color: #fff;
}
/* ===== Related ===== */
.related-section {
  padding: 64px 0 48px;
  background: var(--surface-1);
}
.related-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 32px;
}
.related-header h2 {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--text-title);
  margin: 0;
  position: relative;
  padding-left: 14px;
}
.related-header h2::before {
  content: "";
  position: absolute;
  left: 0;
  top: 50%;
  transform: translateY(-50%);
  width: 4px;
  height: 22px;
  border-radius: 4px;
  background: var(--primary);
}
.related-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 24px;
}
@media (min-width: 768px) {
  .related-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}
@media (min-width: 1024px) {
  .related-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}
.related-card {
  background: #fff;
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid rgba(0, 0, 0, 0.05);
  box-shadow: var(--shadow-sm);
  transition: transform 0.2s ease, box-shadow 0.2s ease;
  display: block;
}
.related-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-hover);
}
.related-card .card-img {
  position: relative;
  overflow: hidden;
  aspect-ratio: 16 / 9;
  background: var(--surface-2);
}
.related-card .card-img img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.35s ease;
}
.related-card:hover .card-img img {
  transform: scale(1.03);
}
.related-card .card-body {
  padding: 20px;
}
.related-card .card-tag {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--primary);
  background: rgba(31, 61, 43, 0.08);
  padding: 2px 10px;
  border-radius: 99px;
  margin-bottom: 10px;
}
.related-card h3 {
  font-size: 1.0625rem;
  font-weight: 600;
  color: var(--text-title);
  line-height: 1.45;
  margin: 0 0 8px;
  transition: color 0.2s;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.related-card:hover h3 {
  color: var(--primary);
}
.related-card .card-desc {
  font-size: 0.875rem;
  color: var(--text-muted);
  line-height: 1.6;
  margin: 0 0 14px;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.related-card .card-meta {
  font-size: 0.8125rem;
  color: var(--text-dim);
  display: flex;
  align-items: center;
  gap: 6px;
}
.back-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 0.9375rem;
  font-weight: 500;
  color: var(--primary);
  margin-top: 36px;
  transition: gap 0.2s;
}
.back-link:hover {
  gap: 12px;
}
/* ===== FAQ ===== */
.faq-section {
  padding: 72px 0 56px;
  background: #fff;
}
.faq-header {
  text-align: center;
  margin-bottom: 40px;
}
.faq-header h2 {
  font-size: clamp(1.5rem, 3vw, 2rem);
  font-weight: 700;
  color: var(--text-title);
  margin: 0 0 8px;
  display: inline-flex;
  align-items: center;
  gap: 10px;
}
.faq-header h2::after {
  content: "";
  width: 32px;
  height: 2px;
  background: var(--primary);
  border-radius: 2px;
  display: block;
}
.faq-header p {
  color: var(--text-muted);
  font-size: 0.9375rem;
  margin: 0;
}
.faq-list {
  max-width: 800px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 14px;
}
.faq-item {
  background: #fff;
  border: 1px solid rgba(0, 0, 0, 0.07);
  border-radius: var(--radius);
  overflow: hidden;
  transition: box-shadow 0.2s ease;
}
.faq-item:hover {
  box-shadow: var(--shadow-sm);
}
.faq-question {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 18px 22px;
  cursor: pointer;
  user-select: none;
  font-size: 1rem;
  font-weight: 600;
  color: var(--text-title);
  background: transparent;
  border: none;
  width: 100%;
  text-align: left;
  transition: background 0.2s;
}
.faq-question:hover {
  background: var(--surface-1);
}
.faq-icon {
  width: 24px;
  height: 24px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 16px;
  color: var(--primary);
  background: rgba(31, 61, 43, 0.06);
  transition: transform 0.3s ease;
  flex-shrink: 0;
  font-weight: 400;
}
.faq-item.active .faq-icon {
  transform: rotate(45deg);
  background: var(--primary);
  color: #fff;
}
.faq-answer {
  max-height: 0;
  overflow: hidden;
  border-top: 0 solid transparent;
  transition: max-height 0.35s ease, padding 0.25s ease, border-color 0.25s;
}
.faq-item.active .faq-answer {
  max-height: 340px;
  border-top-width: 1px;
  border-color: rgba(0, 0, 0, 0.06);
  padding: 16px 22px;
}
.faq-answer p {
  margin: 0;
  color: var(--text-muted);
  font-size: 0.9375rem;
  line-height: 1.75;
}
/* ===== CTA ===== */
.cta-section {
  padding: 64px 0 72px;
  background: var(--primary);
  position: relative;
  overflow: hidden;
}
.cta-section::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    radial-gradient(circle at 20% 20%, rgba(168, 117, 50, 0.18), transparent 60%),
    radial-gradient(circle at 80% 80%, rgba(255, 255, 255, 0.05), transparent 50%);
  pointer-events: none;
}
.cta-inner {
  position: relative;
  text-align: center;
  max-width: 680px;
  margin: 0 auto;
}
.cta-inner h2 {
  color: #fff;
  font-size: clamp(1.5rem, 3vw, 2.1rem);
  font-weight: 700;
  margin: 0 0 12px;
}
.cta-inner p {
  color: rgba(255, 255, 255, 0.75);
  font-size: 0.9375rem;
  margin: 0 0 32px;
}
.cta-buttons {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 14px;
}
@media (min-width: 640px) {
  .cta-buttons {
    flex-direction: row;
    justify-content: center;
  }
}
.cta-btn-download {
  background: #fff;
  color: var(--primary-dark);
  font-weight: 700;
  padding: 15px 44px;
  border-radius: 99px;
  font-size: 1rem;
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.2);
  transition: transform 0.2s ease, box-shadow 0.2s ease, background 0.2s ease;
  display: inline-flex;
  align-items: center;
  gap: 10px;
}
.cta-btn-download:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.25);
  background: #f8f8f6;
}
.cta-btn-download svg {
  width: 20px;
  height: 20px;
}
.cta-btn-web {
  background: transparent;
  color: #fff;
  border: 1px solid rgba(255, 255, 255, 0.4);
  padding: 15px 38px;
  border-radius: 99px;
  font-size: 1rem;
  font-weight: 600;
  transition: background 0.2s, border-color 0.2s;
  display: inline-flex;
  align-items: center;
  gap: 8px;
}
.cta-btn-web:hover {
  background: rgba(255, 255, 255, 0.1);
  border-color: rgba(255, 255, 255, 0.7);
}
.cta-safety {
  margin-top: 24px;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  color: rgba(255, 255, 255, 0.55);
  font-size: 0.8125rem;
}
.cta-safety svg {
  width: 16px;
  height: 16px;
  stroke: var(--accent);
}
/* ===== Footer ===== */
.site-footer {
  background: var(--primary-dark);
  color: rgba(255, 255, 255, 0.7);
  padding: 60px 0 0;
  font-size: 0.9375rem;
}
.footer-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 40px;
  padding-bottom: 48px;
}
@media (min-width: 768px) {
  .footer-grid {
    grid-template-columns: 2fr 1fr 1fr 1fr;
  }
}
.footer-brand .brand {
  margin-bottom: 16px;
}
.footer-brand .brand-logo {
  background: rgba(255, 255, 255, 0.12);
  color: #fff;
  box-shadow: none;
}
.footer-brand .brand-name {
  color: #fff;
}
.footer-brand .brand-sub {
  color: rgba(255, 255, 255, 0.5);
}
.footer-brand p {
  font-size: 0.875rem;
  line-height: 1.7;
  color: rgba(255, 255, 255, 0.55);
  max-width: 320px;
  margin: 0;
}
.footer-col h4 {
  color: #fff;
  font-size: 0.9375rem;
  font-weight: 600;
  margin: 0 0 16px;
  letter-spacing: 0.02em;
}
.footer-col ul {
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.footer-col a {
  color: rgba(255, 255, 255, 0.55);
  font-size: 0.875rem;
  transition: color 0.2s;
}
.footer-col a:hover {
  color: #fff;
}
.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  padding: 20px 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  font-size: 0.8125rem;
  color: rgba(255, 255, 255, 0.4);
}
@media (min-width: 768px) {
  .footer-bottom {
    flex-direction: row;
  }
}
/* ===== Reduced motion ===== */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
  }
}