/* roulang page: index */
:root {
  --color-bg: #0F1216;
  --color-surface: #161B22;
  --color-surface-2: #1C232C;
  --color-border: rgba(255, 255, 255, 0.10);
  --color-text: #F1EFE9;
  --color-text-sub: #A7ADB4;
  --color-primary: #C5A15C;
  --color-primary-hover: #D8BD85;
  --color-accent: #4E9C94;
  --color-error: #D16B5A;
  --color-success: #3F9E7E;
  --radius-lg: 16px;
  --radius-md: 10px;
  --radius-sm: 8px;
  --shadow-card: 0 6px 28px rgba(0, 0, 0, 0.28);
  --shadow-hover: 0 14px 44px rgba(0, 0, 0, 0.38), 0 0 0 1px rgba(197, 161, 92, 0.18);
  --transition: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
  --font-head: "Noto Serif SC", "Source Han Serif SC", "Songti SC", serif;
  --font-body: "Noto Sans SC", "Source Han Sans SC", "Microsoft YaHei", sans-serif;
  --font-num: "Inter", "DIN Alternate", "Helvetica Neue", Arial, sans-serif;
}
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}
html {
  scroll-behavior: smooth;
}
body {
  background: var(--color-bg);
  color: var(--color-text);
  font-family: var(--font-body);
  font-size: 0.9375rem;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}
img {
  max-width: 100%;
  display: block;
}
a {
  color: inherit;
  text-decoration: none;
}
button {
  font-family: inherit;
  cursor: pointer;
  border: none;
  background: none;
  color: inherit;
}
input, textarea {
  font-family: inherit;
  font-size: 0.9375rem;
  color: var(--color-text);
}
:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
}
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}
.section-head {
  text-align: center;
  margin-bottom: 56px;
}
.section-head h2 {
  font-family: var(--font-head);
  font-size: clamp(1.5rem, 2vw + 0.75rem, 2.25rem);
  font-weight: 600;
  line-height: 1.3;
  margin-bottom: 14px;
}
.section-head p {
  color: var(--color-text-sub);
  font-size: 0.9375rem;
  max-width: 680px;
  margin: 0 auto;
}
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 28px;
  border-radius: var(--radius-md);
  font-weight: 500;
  font-size: 0.9375rem;
  line-height: 1.4;
  transition: all var(--transition);
  border: 1px solid transparent;
  cursor: pointer;
  text-align: center;
}
.btn-primary {
  background: var(--color-primary);
  color: #111821;
}
.btn-primary:hover {
  background: var(--color-primary-hover);
  box-shadow: 0 10px 30px rgba(197, 161, 92, 0.28);
  transform: translateY(-1px);
}
.btn-primary:active {
  filter: brightness(0.95);
  transform: translateY(0);
}
.btn-outline {
  background: transparent;
  border-color: var(--color-border);
  color: var(--color-text);
}
.btn-outline:hover {
  border-color: var(--color-primary);
  color: var(--color-primary);
}
.btn-sm {
  padding: 9px 20px;
  font-size: 0.875rem;
}
.btn-block {
  width: 100%;
}
.text-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  color: var(--color-text);
  font-size: 0.875rem;
  font-weight: 500;
  transition: all var(--transition);
}
.text-link:hover {
  color: var(--color-primary);
}
.text-link i {
  transition: transform var(--transition);
}
.text-link:hover i {
  transform: translateX(4px);
}
.badge {
  display: inline-block;
  padding: 4px 12px;
  border-radius: 999px;
  border: 1px solid var(--color-primary);
  color: var(--color-primary);
  font-size: 0.75rem;
  line-height: 1.5;
  white-space: nowrap;
}
.tag {
  display: inline-block;
  padding: 5px 14px;
  border-radius: 999px;
  border: 1px solid var(--color-border);
  font-size: 0.8125rem;
  color: var(--color-text-sub);
  transition: all var(--transition);
  cursor: pointer;
  background: var(--color-surface-2);
}
.tag:hover {
  border-color: var(--color-primary);
  color: var(--color-primary);
}
/* Topbar */
.topbar {
  background: #0A0D10;
  border-bottom: 1px solid var(--color-border);
  height: 48px;
  display: flex;
  align-items: center;
}
.topbar-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
}
.topbar-domain {
  font-size: 0.8125rem;
  color: var(--color-text-sub);
  font-family: var(--font-num);
  letter-spacing: 0.02em;
}
.topbar-right {
  display: flex;
  align-items: center;
  gap: 20px;
  font-size: 0.8125rem;
  color: var(--color-text-sub);
}
.topbar-right a {
  transition: color var(--transition);
}
.topbar-right a:hover {
  color: var(--color-primary);
}
/* Navbar */
.navbar {
  position: sticky;
  top: 0;
  z-index: 100;
  height: 76px;
  background: rgba(15, 18, 22, 0.9);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--color-border);
  display: flex;
  align-items: center;
}
.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
}
.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-shrink: 0;
}
.brand-mark {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 34px;
  height: 34px;
  border: 1px solid rgba(197, 161, 92, 0.4);
  border-radius: 10px;
  background: rgba(197, 161, 92, 0.08);
}
.brand-mark svg {
  display: block;
}
.brand-name {
  font-family: var(--font-head);
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--color-text);
  letter-spacing: 0.02em;
}
.nav-links {
  display: flex;
  align-items: center;
  gap: 36px;
}
.nav-link {
  position: relative;
  padding: 8px 0;
  font-size: 0.9375rem;
  color: var(--color-text-sub);
  transition: color var(--transition);
  font-weight: 400;
}
.nav-link::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 100%;
  height: 2px;
  background: var(--color-primary);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--transition);
  border-radius: 2px;
}
.nav-link:hover {
  color: var(--color-text);
}
.nav-link:hover::after {
  transform: scaleX(1);
}
.nav-link.active {
  color: var(--color-text);
}
.nav-link.active::after {
  transform: scaleX(1);
}
.nav-actions {
  display: flex;
  align-items: center;
  gap: 16px;
}
.nav-cta {
  font-size: 0.8125rem;
}
.hamburger {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 40px;
  height: 40px;
  border-radius: 8px;
  border: 1px solid var(--color-border);
  align-items: center;
  transition: border-color var(--transition);
}
.hamburger:hover {
  border-color: var(--color-primary);
}
.hamburger span {
  display: block;
  width: 20px;
  height: 2px;
  background: var(--color-text);
  border-radius: 2px;
  transition: all var(--transition);
}
.hamburger.open span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}
.hamburger.open span:nth-child(2) {
  opacity: 0;
}
.hamburger.open span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}
/* Drawer */
.drawer-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.65);
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
  z-index: 200;
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.2s ease;
}
.drawer-overlay.active {
  opacity: 1;
  visibility: visible;
}
.drawer {
  position: fixed;
  top: 0;
  right: 0;
  width: min(80vw, 320px);
  height: 100vh;
  background: var(--color-surface);
  border-left: 1px solid var(--color-border);
  z-index: 210;
  transform: translateX(100%);
  transition: transform 0.25s cubic-bezier(0.4, 0, 0.2, 1);
  padding: 24px;
  display: flex;
  flex-direction: column;
  overflow-y: auto;
}
.drawer.open {
  transform: translateX(0);
}
.drawer-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-bottom: 20px;
  border-bottom: 1px solid var(--color-border);
  margin-bottom: 20px;
}
.drawer-close {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.25rem;
  color: var(--color-text-sub);
  background: var(--color-surface-2);
  transition: background var(--transition), color var(--transition);
}
.drawer-close:hover {
  background: var(--color-border);
  color: var(--color-text);
}
.drawer-nav {
  display: flex;
  flex-direction: column;
  gap: 4px;
  flex: 1;
}
.drawer-link {
  padding: 14px 16px;
  font-size: 1rem;
  color: var(--color-text-sub);
  border-radius: var(--radius-md);
  transition: all var(--transition);
}
.drawer-link:hover {
  background: var(--color-surface-2);
  color: var(--color-text);
}
.drawer-link.active {
  background: rgba(197, 161, 92, 0.1);
  color: var(--color-primary);
}
.drawer-cta {
  margin-top: 20px;
  width: 100%;
}
/* Hero */
.hero {
  padding: 96px 0 80px;
  background: linear-gradient(180deg, #0F1216 0%, #11161C 100%);
  border-bottom: 1px solid var(--color-border);
}
.hero-inner {
  display: grid;
  grid-template-columns: 7fr 5fr;
  gap: 64px;
  align-items: center;
}
.hero-tag {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 16px;
  border-radius: 999px;
  background: rgba(197, 161, 92, 0.1);
  border: 1px solid rgba(197, 161, 92, 0.25);
  color: var(--color-primary);
  font-size: 0.8125rem;
  font-weight: 500;
  margin-bottom: 28px;
}
.hero-content h1 {
  font-family: var(--font-head);
  font-size: clamp(2.25rem, 4vw + 1rem, 3.5rem);
  line-height: 1.15;
  font-weight: 600;
  margin-bottom: 24px;
  color: var(--color-text);
}
.hero-content h1 .accent {
  color: var(--color-primary);
}
.hero-desc {
  font-size: 1rem;
  color: var(--color-text-sub);
  line-height: 1.7;
  max-width: 440px;
  margin-bottom: 36px;
}
.hero-actions {
  display: flex;
  gap: 16px;
  margin-bottom: 40px;
  flex-wrap: wrap;
}
.hero-trust {
  display: flex;
  align-items: center;
  gap: 16px;
  flex-wrap: wrap;
}
.trust-item {
  font-size: 0.8125rem;
  color: var(--color-text-sub);
}
.trust-dot {
  width: 4px;
  height: 4px;
  border-radius: 50%;
  background: var(--color-primary);
  opacity: 0.6;
}
.hero-visual {
  position: relative;
}
.hero-visual-inner {
  position: relative;
  border-radius: var(--radius-lg);
  overflow: hidden;
  min-height: 460px;
  background-size: cover;
  background-position: center;
  border: 1px solid var(--color-border);
  box-shadow: var(--shadow-card);
}
.hero-visual-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(15, 18, 22, 0.35) 0%, rgba(15, 18, 22, 0.75) 100%);
}
.hero-visual-content {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  padding: 32px;
}
.visual-badge {
  display: inline-block;
  padding: 4px 14px;
  border-radius: 999px;
  background: rgba(15, 18, 22, 0.6);
  border: 1px solid rgba(255, 255, 255, 0.2);
  font-size: 0.8125rem;
  color: var(--color-text);
  margin-bottom: 10px;
  backdrop-filter: blur(4px);
}
.hero-visual-content p {
  font-family: var(--font-head);
  font-size: 1.25rem;
  color: var(--color-text);
  letter-spacing: 0.05em;
}
/* Pain */
.pain {
  padding: 64px 0;
  background: var(--color-surface);
  border-bottom: 1px solid var(--color-border);
}
.pain-grid {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  gap: 40px;
}
.pain-item {
  display: flex;
  align-items: flex-start;
  gap: 16px;
  padding: 20px 0;
  border-bottom: 1px solid var(--color-border);
}
.pain-icon {
  width: 44px;
  height: 44px;
  border-radius: 12px;
  background: rgba(197, 161, 92, 0.08);
  border: 1px solid rgba(197, 161, 92, 0.2);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1rem;
  color: var(--color-primary);
  flex-shrink: 0;
}
.pain-item p {
  font-size: 0.9375rem;
  color: var(--color-text-sub);
  line-height: 1.6;
}
/* Solutions */
.solutions {
  padding: 96px 0;
  border-bottom: 1px solid var(--color-border);
  background: var(--color-bg);
}
.solutions-grid {
  display: grid;
  grid-template-columns: 1.35fr 1fr;
  gap: 24px;
  align-items: stretch;
}
.solution-col {
  display: grid;
  grid-template-rows: 1fr 1fr;
  gap: 24px;
}
.solution-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  box-shadow: var(--shadow-card);
  transition: all var(--transition);
}
.solution-card:hover {
  border-color: rgba(197, 161, 92, 0.5);
  box-shadow: var(--shadow-hover);
  transform: translateY(-2px);
}
.solution-card-large {
  min-height: 100%;
}
.card-media {
  position: relative;
  overflow: hidden;
  border-radius: 0;
  aspect-ratio: 16 / 9;
}
.card-media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.4s ease;
}
.solution-card:hover .card-media img {
  transform: scale(1.04);
}
.card-body {
  padding: 28px;
  display: flex;
  flex-direction: column;
  flex: 1;
}
.card-number {
  font-family: var(--font-head);
  font-size: 0.9375rem;
  color: var(--color-primary);
  letter-spacing: 0.1em;
  margin-bottom: 8px;
  font-weight: 600;
}
.card-body h3 {
  font-family: var(--font-head);
  font-size: 1.25rem;
  font-weight: 500;
  line-height: 1.4;
  margin-bottom: 12px;
}
.card-body > p {
  font-size: 0.875rem;
  color: var(--color-text-sub);
  line-height: 1.6;
  margin-bottom: 16px;
}
.feature-list {
  list-style: none;
  padding: 0;
  margin: 0 0 20px;
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.feature-list li {
  position: relative;
  padding-left: 20px;
  font-size: 0.875rem;
  color: var(--color-text-sub);
  line-height: 1.6;
}
.feature-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 9px;
  width: 8px;
  height: 8px;
  background: var(--color-primary);
  border-radius: 2px;
  flex-shrink: 0;
}
.solution-card-large .card-body {
  justify-content: center;
}
/* Stats */
.stats {
  padding: 96px 0;
  background: var(--color-surface-2);
  border-bottom: 1px solid var(--color-border);
}
.stats-grid {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  flex-wrap: wrap;
}
.stat-item {
  flex: 1;
  text-align: center;
  padding: 24px 16px;
  min-width: 150px;
}
.stat-divider {
  width: 1px;
  height: 64px;
  background: rgba(197, 161, 92, 0.25);
  flex-shrink: 0;
}
.stat-number {
  display: block;
  font-family: var(--font-num);
  font-size: clamp(2.5rem, 6vw, 4rem);
  line-height: 1;
  font-weight: 600;
  color: var(--color-accent);
  margin-bottom: 12px;
}
.stat-label {
  font-size: 0.875rem;
  color: var(--color-text-sub);
}
/* News */
.news {
  padding: 96px 0;
  border-bottom: 1px solid var(--color-border);
}
.news-grid {
  display: grid;
  grid-template-columns: 8fr 4fr;
  gap: 40px;
  align-items: start;
}
.news-list {
  display: flex;
  flex-direction: column;
}
.news-row {
  display: grid;
  grid-template-columns: 88px 1fr auto;
  gap: 24px;
  align-items: center;
  padding: 24px 16px;
  border-radius: var(--radius-md);
  transition: background var(--transition);
  border-bottom: 1px solid var(--color-border);
}
.news-row:last-child {
  border-bottom: none;
}
.news-row:hover {
  background: var(--color-surface);
}
.news-date {
  text-align: center;
}
.news-date strong {
  display: block;
  font-family: var(--font-num);
  font-size: 1.75rem;
  font-weight: 600;
  color: var(--color-primary);
  line-height: 1.2;
}
.news-date em {
  font-style: normal;
  font-size: 0.75rem;
  color: var(--color-text-sub);
}
.news-body {
  min-width: 0;
}
.news-title {
  display: block;
  font-size: 1rem;
  font-weight: 500;
  color: var(--color-text);
  line-height: 1.5;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  margin-bottom: 4px;
  transition: color var(--transition);
}
.news-row:hover .news-title {
  color: var(--color-primary);
}
.news-excerpt {
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  font-size: 0.8125rem;
  color: var(--color-text-sub);
  line-height: 1.6;
}
.news-side {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-shrink: 0;
}
.news-arrow {
  font-size: 1.125rem;
  color: var(--color-text-sub);
  transition: all var(--transition);
}
.news-row:hover .news-arrow {
  color: var(--color-primary);
  transform: translateX(3px);
}
.news-sidebar {
  display: flex;
  flex-direction: column;
  gap: 24px;
}
.sidebar-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 28px;
  box-shadow: var(--shadow-card);
}
.sidebar-card h3 {
  font-family: var(--font-head);
  font-size: 1.125rem;
  font-weight: 500;
  margin-bottom: 16px;
}
.sidebar-card p {
  font-size: 0.875rem;
  color: var(--color-text-sub);
  margin-bottom: 16px;
}
.tag-cloud {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}
.sidebar-card-cta {
  background: var(--color-surface-2);
  border-color: rgba(197, 161, 92, 0.2);
}
/* Empty State */
.empty-state {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 48px;
  border: 1px dashed var(--color-border);
  border-radius: var(--radius-lg);
  background: var(--color-surface);
  text-align: center;
  min-height: 240px;
}
.empty-state .empty-icon {
  font-size: 2.5rem;
  color: var(--color-text-sub);
  margin-bottom: 16px;
  opacity: 0.5;
}
.empty-state p {
  font-size: 1rem;
  color: var(--color-text);
  font-weight: 500;
  margin-bottom: 8px;
}
.empty-state span {
  font-size: 0.8125rem;
  color: var(--color-text-sub);
}
/* Contact */
.contact {
  padding: 96px 0;
  background: var(--color-surface-2);
  border-bottom: 1px solid var(--color-border);
}
.contact-grid {
  display: grid;
  grid-template-columns: 5fr 7fr;
  gap: 64px;
  align-items: center;
}
.contact-info h2 {
  font-family: var(--font-head);
  font-size: clamp(1.5rem, 2vw + 0.75rem, 2.25rem);
  font-weight: 600;
  line-height: 1.3;
  margin-bottom: 20px;
}
.contact-info > p {
  font-size: 0.9375rem;
  color: var(--color-text-sub);
  margin-bottom: 32px;
  line-height: 1.7;
}
.contact-list {
  list-style: none;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 16px;
}
.contact-list li {
  display: flex;
  align-items: center;
  gap: 14px;
  font-size: 0.875rem;
  color: var(--color-text-sub);
}
.contact-list i {
  width: 20px;
  color: var(--color-primary);
  font-size: 1rem;
}
.contact-form-wrap {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 40px;
  box-shadow: var(--shadow-card);
}
.contact-form {
  display: flex;
  flex-direction: column;
  gap: 20px;
}
.form-group {
  display: flex;
  flex-direction: column;
  gap: 6px;
}
.form-group label {
  font-size: 0.8125rem;
  color: var(--color-text-sub);
  letter-spacing: 0.06em;
  text-transform: uppercase;
}
.form-group input,
.form-group textarea {
  width: 100%;
  background: var(--color-surface-2);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  height: 48px;
  padding: 0 16px;
  transition: border-color var(--transition), box-shadow var(--transition);
}
.form-group textarea {
  height: auto;
  min-height: 120px;
  padding: 12px 16px;
  resize: vertical;
}
.form-group input:focus,
.form-group textarea:focus {
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(197, 161, 92, 0.15);
  outline: none;
}
.form-group input::placeholder,
.form-group textarea::placeholder {
  color: rgba(167, 173, 180, 0.6);
}
.privacy-text {
  font-size: 0.75rem;
  color: var(--color-text-sub);
  text-align: center;
  line-height: 1.5;
}
.privacy-text i {
  margin-right: 4px;
  font-size: 0.6875rem;
}
.form-success {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 48px 24px;
  gap: 8px;
}
.form-success i {
  font-size: 2.5rem;
  color: var(--color-success);
  margin-bottom: 12px;
}
.form-success h4 {
  font-size: 1.125rem;
  font-weight: 500;
}
.form-success p {
  font-size: 0.875rem;
  color: var(--color-text-sub);
  max-width: 280px;
}
/* FAQ */
.faq {
  padding: 96px 0;
}
.faq-list {
  max-width: 860px;
  margin: 0 auto;
}
.faq-item {
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  margin-bottom: 12px;
  background: var(--color-surface);
  overflow: hidden;
  transition: border-color var(--transition);
}
.faq-item:hover {
  border-color: rgba(197, 161, 92, 0.3);
}
.faq-q {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  padding: 22px 28px;
  text-align: left;
  font-size: 1rem;
  font-weight: 500;
  color: var(--color-text);
  transition: color var(--transition);
  gap: 16px;
}
.faq-q:hover {
  color: var(--color-primary);
}
.faq-icon {
  font-size: 1.5rem;
  font-weight: 300;
  color: var(--color-text-sub);
  transition: all var(--transition);
  flex-shrink: 0;
  line-height: 1;
}
.faq-item.open .faq-icon {
  transform: rotate(45deg);
  color: var(--color-primary);
}
.faq-item.open .faq-q {
  color: var(--color-primary);
}
.faq-a {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.25s cubic-bezier(0.4, 0, 0.2, 1);
}
.faq-item.open .faq-a {
  max-height: 400px;
}
.faq-a-inner {
  padding: 0 28px 24px;
}
.faq-a-inner p {
  font-size: 0.9375rem;
  color: var(--color-text-sub);
  line-height: 1.7;
}
/* Footer */
.footer {
  background: #0A0D10;
  border-top: 1px solid var(--color-border);
  padding: 64px 0 32px;
}
.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1.5fr;
  gap: 48px;
  padding-bottom: 48px;
  border-bottom: 1px solid var(--color-border);
  margin-bottom: 24px;
}
.footer-brand .brand-name {
  font-size: 1.25rem;
  margin-bottom: 16px;
}
.footer-brand p {
  font-size: 0.875rem;
  color: var(--color-text-sub);
  line-height: 1.7;
  max-width: 320px;
}
.footer h3 {
  font-family: var(--font-head);
  font-size: 1rem;
  font-weight: 500;
  margin-bottom: 20px;
  color: var(--color-text);
}
.footer-nav {
  display: flex;
  flex-direction: column;
}
.footer-nav a {
  padding: 6px 0;
  font-size: 0.875rem;
  color: var(--color-text-sub);
  transition: color var(--transition);
}
.footer-nav a:hover {
  color: var(--color-primary);
}
.footer-contact p {
  font-size: 0.875rem;
  color: var(--color-text-sub);
  padding: 6px 0;
}
.footer-bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 0.8125rem;
  color: var(--color-text-sub);
  flex-wrap: wrap;
  gap: 12px;
}
/* Modal */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.65);
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
  z-index: 300;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 16px;
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.2s ease, visibility 0.2s ease;
}
.modal-overlay.active {
  opacity: 1;
  visibility: visible;
}
.modal {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: 20px;
  width: min(92vw, 500px);
  padding: 40px;
  position: relative;
  box-shadow: 0 24px 64px rgba(0, 0, 0, 0.45);
  transform: scale(0.96) translateY(12px);
  transition: transform 0.25s cubic-bezier(0.4, 0, 0.2, 1);
  max-height: 90vh;
  overflow-y: auto;
}
.modal-overlay.active .modal {
  transform: scale(1) translateY(0);
}
.modal-close {
  position: absolute;
  top: 16px;
  right: 16px;
  width: 40px;
  height: 40px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.25rem;
  color: var(--color-text-sub);
  background: var(--color-surface-2);
  transition: all var(--transition);
}
.modal-close:hover {
  background: var(--color-border);
  color: var(--color-text);
}
.modal h3 {
  font-family: var(--font-head);
  font-size: 1.375rem;
  font-weight: 500;
  margin-bottom: 8px;
}
.modal-sub {
  font-size: 0.875rem;
  color: var(--color-text-sub);
  margin-bottom: 24px;
}
.modal .contact-form-wrap {
  background: transparent;
  border: none;
  padding: 0;
  box-shadow: none;
}
/* Scroll reveal */
.reveal {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}
.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}
/* Responsive */
@media (max-width: 1023px) {
  .hero-inner {
    grid-template-columns: 1fr;
    gap: 40px;
  }
  .hero-visual-inner {
    min-height: 320px;
  }
  .solutions-grid {
    grid-template-columns: 1fr;
  }
  .solution-col {
    grid-template-rows: auto;
  }
  .news-grid {
    grid-template-columns: 1fr;
  }
  .contact-grid {
    grid-template-columns: 1fr;
    gap: 40px;
  }
  .stats-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 24px;
  }
  .stat-divider {
    display: none;
  }
  .footer-grid {
    grid-template-columns: 1fr 1fr;
    gap: 32px;
  }
}
@media (max-width: 767px) {
  .topbar-right span {
    display: none;
  }
  .nav-links {
    display: none;
  }
  .nav-cta {
    display: none;
  }
  .hamburger {
    display: flex;
  }
  .hero {
    padding: 64px 0 56px;
  }
  .hero-content h1 {
    font-size: 1.875rem;
  }
  .hero-actions {
    flex-direction: column;
  }
  .hero-actions .btn {
    width: 100%;
  }
  .hero-trust {
    gap: 10px;
  }
  .pain-grid {
    grid-template-columns: 1fr;
    gap: 16px;
  }
  .solutions,
  .stats,
  .news,
  .contact,
  .faq {
    padding: 64px 0;
  }
  .section-head {
    margin-bottom: 36px;
  }
  .news-row {
    grid-template-columns: 60px 1fr;
    gap: 16px;
    padding: 18px 12px;
  }
  .news-side {
    display: none;
  }
  .news-date strong {
    font-size: 1.375rem;
  }
  .contact-form-wrap {
    padding: 24px;
  }
  .footer-grid {
    grid-template-columns: 1fr;
    gap: 28px;
  }
  .footer-bottom {
    flex-direction: column;
    text-align: center;
  }
  .stats-grid {
    grid-template-columns: 1fr 1fr;
    gap: 16px;
  }
  .stat-item {
    padding: 16px;
    min-width: 0;
  }
  .stat-number {
    font-size: 2.25rem;
  }
  .modal {
    padding: 28px;
  }
}
@media (max-width: 480px) {
  .container {
    padding: 0 16px;
  }
  .hero-visual-inner {
    min-height: 240px;
  }
  .stats-grid {
    grid-template-columns: 1fr;
  }
  .card-body {
    padding: 20px;
  }
  .faq-q {
    padding: 18px 20px;
    font-size: 0.9375rem;
  }
  .faq-a-inner {
    padding: 0 20px 20px;
  }
}
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
  .reveal {
    opacity: 1;
    transform: none;
  }
  .solution-card:hover {
    transform: none;
  }
  .collapse-panel {
    transition: none;
  }
}

/* roulang page: category1 */
:root {
  --color-bg: #0F1216;
  --color-surface: #161B22;
  --color-surface-2: #1C232C;
  --color-border: rgba(255, 255, 255, 0.10);
  --color-text: #F1EFE9;
  --color-text-sub: #A7ADB4;
  --color-primary: #C5A15C;
  --color-primary-hover: #D8BD85;
  --color-accent: #4E9C94;
  --color-error: #D16B5A;
  --color-success: #3F9E7E;
  --font-serif: "Noto Serif SC", "Source Han Serif SC", "Songti SC", serif;
  --font-sans: "Noto Sans SC", "Source Han Sans SC", "Microsoft YaHei", sans-serif;
  --font-num: "Inter", "DIN Alternate", "Helvetica Neue", Arial, sans-serif;
  --radius-lg: 16px;
  --radius-btn: 10px;
  --radius-img: 12px;
  --radius-badge: 999px;
  --shadow-card: 0 6px 28px rgba(0, 0, 0, 0.28);
  --shadow-card-hover: 0 14px 44px rgba(0, 0, 0, 0.38), 0 0 0 1px rgba(197, 161, 92, 0.18);
  --shadow-btn-hover: 0 10px 30px rgba(197, 161, 92, 0.28);
  --transition: cubic-bezier(0.4, 0, 0.2, 1) 0.25s;
}
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: var(--font-sans);
  font-size: 0.9375rem;
  line-height: 1.7;
  color: var(--color-text);
  background: var(--color-bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}
img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; transition: color var(--transition); }
button { font-family: inherit; cursor: pointer; border: none; background: none; color: inherit; }
input, textarea { font-family: inherit; font-size: 0.9375rem; color: var(--color-text); outline: none; }
ul, ol { list-style: none; }
.container { max-width: 1200px; margin: 0 auto; padding: 0 24px; }
.section { padding: 96px 0; }
.section-title {
  font-family: var(--font-serif);
  font-size: clamp(1.5rem, 2vw + 0.75rem, 2.25rem);
  line-height: 1.3;
  font-weight: 600;
  margin-bottom: 16px;
}
.section-sub { color: var(--color-text-sub); font-size: 0.9375rem; max-width: 640px; margin-bottom: 48px; }
.text-gold { color: var(--color-primary); }
.text-accent { color: var(--color-accent); }

/* === Topbar === */
.topbar {
  height: 48px;
  background: #0A0D10;
  border-bottom: 1px solid var(--color-border);
  display: flex;
  align-items: center;
}
.topbar .container { display: flex; align-items: center; justify-content: space-between; width: 100%; }
.topbar-domain { font-size: 13px; color: var(--color-text-sub); font-family: var(--font-num); letter-spacing: 0.02em; }
.topbar-right { display: flex; align-items: center; gap: 24px; }
.topbar-link { font-size: 13px; color: var(--color-text-sub); transition: color var(--transition); }
.topbar-link:hover { color: var(--color-primary); }
.topbar-btn {
  font-size: 13px;
  color: var(--color-primary);
  border: 1px solid rgba(197, 161, 92, 0.4);
  border-radius: var(--radius-badge);
  padding: 3px 16px;
  transition: all var(--transition);
}
.topbar-btn:hover { background: rgba(197, 161, 92, 0.1); border-color: var(--color-primary); }

/* === Main Nav === */
.main-nav {
  position: sticky;
  top: 0;
  z-index: 1000;
  height: 76px;
  background: rgba(15, 18, 22, 0.9);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--color-border);
  display: flex;
  align-items: center;
}
.main-nav .container { display: flex; align-items: center; justify-content: space-between; width: 100%; }
.brand { display: flex; align-items: center; gap: 12px; }
.brand-mark {
  width: 38px;
  height: 38px;
  border: 1.5px solid var(--color-primary);
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  flex-shrink: 0;
}
.brand-mark::before {
  content: "";
  width: 16px;
  height: 16px;
  border: 2px solid var(--color-primary);
  border-radius: 50%;
  border-left-color: transparent;
  animation: spin 8s linear infinite;
}
.brand-mark::after {
  content: "";
  position: absolute;
  width: 6px;
  height: 6px;
  background: var(--color-accent);
  border-radius: 50%;
}
@keyframes spin { to { transform: rotate(360deg); } }
.brand-name {
  font-family: var(--font-serif);
  font-size: 20px;
  font-weight: 600;
  color: var(--color-text);
  letter-spacing: 0.02em;
}
.nav-links { display: flex; align-items: center; gap: 36px; }
.nav-link {
  font-size: 0.9375rem;
  color: var(--color-text-sub);
  padding: 6px 0;
  position: relative;
  transition: color var(--transition);
}
.nav-link::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 0;
  height: 2px;
  background: var(--color-primary);
  transition: width var(--transition);
}
.nav-link:hover { color: var(--color-text); }
.nav-link:hover::after { width: 100%; }
.nav-link.active { color: var(--color-primary); }
.nav-link.active::after { width: 100%; }
.nav-cta { margin-left: 12px; }
.hamburger { display: none; width: 40px; height: 40px; border-radius: 8px; align-items: center; justify-content: center; gap: 5px; flex-direction: column; }
.hamburger span { display: block; width: 20px; height: 2px; background: var(--color-text); border-radius: 2px; transition: all var(--transition); }
.mobile-drawer {
  position: fixed;
  top: 0;
  right: -320px;
  width: min(80vw, 320px);
  height: 100vh;
  background: var(--color-surface);
  z-index: 1100;
  transition: right 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  padding: 24px;
  display: flex;
  flex-direction: column;
}
.mobile-drawer.open { right: 0; }
.drawer-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.65);
  z-index: 1050;
  opacity: 0;
  visibility: hidden;
  transition: all 0.3s var(--transition);
}
.drawer-overlay.open { opacity: 1; visibility: visible; }
.mobile-drawer .nav-link { font-size: 1.125rem; padding: 14px 0; border-bottom: 1px solid var(--color-border); }
.mobile-drawer .drawer-cta { margin-top: 24px; }

/* === Buttons === */
.btn-primary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: var(--color-primary);
  color: #111821;
  font-size: 0.9375rem;
  font-weight: 500;
  padding: 12px 32px;
  border-radius: var(--radius-btn);
  transition: all var(--transition);
  gap: 8px;
}
.btn-primary:hover { background: var(--color-primary-hover); box-shadow: var(--shadow-btn-hover); transform: translateY(-2px); color: #111821; }
.btn-primary:active { filter: brightness(0.95); transform: translateY(0); }
.btn-primary:focus-visible { outline: 2px solid var(--color-primary); outline-offset: 2px; }
.btn-outline {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: transparent;
  border: 1px solid var(--color-border);
  color: var(--color-text);
  font-size: 0.9375rem;
  padding: 12px 32px;
  border-radius: var(--radius-btn);
  transition: all var(--transition);
  gap: 8px;
}
.btn-outline:hover { border-color: var(--color-primary); color: var(--color-primary); transform: translateY(-2px); }
.btn-outline:focus-visible { outline: 2px solid var(--color-primary); outline-offset: 2px; }
.btn-sm { padding: 8px 20px; font-size: 0.875rem; }

/* === Hero === */
.cat-hero {
  position: relative;
  min-height: 420px;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 120px 0 80px;
  overflow: hidden;
  background: url('/assets/images/backpic/back-1.png') center/cover no-repeat;
}
.cat-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(15,18,22,0.92) 0%, rgba(15,18,22,0.72) 50%, rgba(15,18,22,0.88) 100%);
}
.cat-hero::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 0;
  width: 100%;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--color-primary), transparent);
}
.cat-hero-content { position: relative; z-index: 1; }
.cat-hero .cat-badge {
  display: inline-block;
  font-size: 13px;
  color: var(--color-primary);
  border: 1px solid rgba(197, 161, 92, 0.4);
  border-radius: var(--radius-badge);
  padding: 5px 20px;
  margin-bottom: 24px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}
.cat-hero h1 {
  font-family: var(--font-serif);
  font-size: clamp(2.25rem, 4vw + 1rem, 3.5rem);
  line-height: 1.15;
  font-weight: 600;
  margin-bottom: 24px;
}
.cat-hero p {
  font-size: 1.0625rem;
  color: var(--color-text-sub);
  max-width: 580px;
  margin: 0 auto;
  line-height: 1.8;
}
.breadcrumb {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-size: 13px;
  color: var(--color-text-sub);
  margin-bottom: 24px;
}
.breadcrumb a { color: var(--color-text-sub); }
.breadcrumb a:hover { color: var(--color-primary); }
.breadcrumb .sep { color: var(--color-border); }

/* === Intro section === */
.intro-section { background: var(--color-bg); }
.intro-grid {
  display: grid;
  grid-template-columns: 7fr 5fr;
  gap: 64px;
  align-items: center;
}
.intro-content h2 { margin-bottom: 24px; }
.intro-content p { color: var(--color-text-sub); margin-bottom: 20px; font-size: 1rem; line-height: 1.85; }
.intro-content p strong { color: var(--color-text); font-weight: 500; }
.intro-points { margin-top: 32px; display: grid; gap: 16px; }
.intro-point { display: flex; gap: 12px; align-items: flex-start; }
.intro-point .point-icon {
  width: 22px;
  height: 22px;
  flex-shrink: 0;
  border-radius: 50%;
  background: rgba(78, 156, 148, 0.15);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-top: 3px;
}
.intro-point .point-icon svg { width: 12px; height: 12px; stroke: var(--color-accent); }
.intro-point p { margin: 0; font-size: 0.9375rem; color: var(--color-text); }
.intro-point p span { color: var(--color-text-sub); }
.intro-image {
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--color-border);
  box-shadow: var(--shadow-card);
}
.intro-image img { width: 100%; height: 380px; object-fit: cover; transition: transform 0.5s ease; }
.intro-image:hover img { transform: scale(1.04); }

/* === Sub categories === */
.subcats-section { background: var(--color-surface); border-top: 1px solid var(--color-border); border-bottom: 1px solid var(--color-border); }
.subcat-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 32px; }
.subcat-card {
  display: flex;
  gap: 24px;
  background: var(--color-surface-2);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 28px;
  transition: all var(--transition);
  align-items: center;
}
.subcat-card:hover {
  border-color: rgba(197, 161, 92, 0.5);
  box-shadow: var(--shadow-card-hover);
  transform: translateY(-2px);
}
.subcat-thumb {
  width: 120px;
  height: 100px;
  flex-shrink: 0;
  border-radius: var(--radius-img);
  overflow: hidden;
}
.subcat-thumb img { width: 100%; height: 100%; object-fit: cover; transition: transform 0.5s ease; }
.subcat-card:hover .subcat-thumb img { transform: scale(1.04); }
.subcat-info h3 { font-size: 1.25rem; font-weight: 500; font-family: var(--font-serif); margin-bottom: 8px; }
.subcat-info p { font-size: 0.875rem; color: var(--color-text-sub); margin-bottom: 12px; }
.subcat-link { font-size: 0.875rem; color: var(--color-primary); display: inline-flex; align-items: center; gap: 6px; }
.subcat-link .arrow { transition: transform var(--transition); }
.subcat-link:hover .arrow { transform: translateX(4px); }

/* === Scenarios === */
.scenarios-section { background: var(--color-bg); }
.scenarios-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 20px 48px; }
.scenario-item { display: flex; gap: 16px; align-items: flex-start; padding: 20px; border-radius: var(--radius-lg); border: 1px solid transparent; transition: all var(--transition); }
.scenario-item:hover { background: var(--color-surface); border-color: var(--color-border); }
.scenario-icon {
  width: 28px;
  height: 28px;
  flex-shrink: 0;
  border-radius: 50%;
  background: rgba(78, 156, 148, 0.12);
  display: flex;
  align-items: center;
  justify-content: center;
}
.scenario-icon svg { width: 14px; height: 14px; stroke: var(--color-accent); }
.scenario-item h3 { font-size: 1rem; font-weight: 500; margin-bottom: 4px; }
.scenario-item p { font-size: 0.875rem; color: var(--color-text-sub); }

/* === FAQ === */
.faq-section { background: var(--color-surface); border-top: 1px solid var(--color-border); border-bottom: 1px solid var(--color-border); }
.faq-wrap { max-width: 860px; margin: 0 auto; }
.faq-item {
  border-bottom: 1px solid var(--color-border);
}
.faq-item:last-child { border-bottom: none; }
.faq-question {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 24px 4px;
  font-size: 1rem;
  font-weight: 500;
  color: var(--color-text);
  cursor: pointer;
  transition: color var(--transition);
  gap: 24px;
}
.faq-question:hover { color: var(--color-primary); }
.faq-question.active { color: var(--color-primary); }
.faq-icon {
  width: 28px;
  height: 28px;
  flex-shrink: 0;
  border: 1px solid var(--color-border);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  transition: all var(--transition);
}
.faq-icon::before,
.faq-icon::after {
  content: "";
  position: absolute;
  background: var(--color-text-sub);
  border-radius: 2px;
  transition: all var(--transition);
}
.faq-icon::before { width: 10px; height: 2px; }
.faq-icon::after { width: 2px; height: 10px; }
.faq-question.active .faq-icon { border-color: var(--color-primary); }
.faq-question.active .faq-icon::before,
.faq-question.active .faq-icon::after { background: var(--color-primary); }
.faq-question.active .faq-icon::after { transform: scaleY(0); }
.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}
.faq-answer-inner { padding: 0 4px 24px; color: var(--color-text-sub); font-size: 0.9375rem; line-height: 1.8; max-width: 720px; }

/* === CTA === */
.cta-banner {
  background: linear-gradient(135deg, #0A0D10 0%, #161B22 50%, #1C232C 100%);
  border-top: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
  padding: 64px 0;
}
.cta-flex {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 48px;
}
.cta-banner h2 { font-family: var(--font-serif); font-size: clamp(1.25rem, 1.5vw + 0.5rem, 1.75rem); font-weight: 600; margin-bottom: 8px; }
.cta-banner p { color: var(--color-text-sub); font-size: 0.9375rem; }

/* === Footer === */
.footer {
  background: #0A0D10;
  border-top: 1px solid var(--color-border);
  padding: 64px 0 32px;
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1.2fr;
  gap: 48px;
  margin-bottom: 48px;
}
.footer-brand .brand-name { font-size: 1.25rem; display: block; margin-bottom: 12px; }
.footer-brand p { font-size: 0.875rem; color: var(--color-text-sub); line-height: 1.7; }
.footer-nav h3, .footer-contact h3 {
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--color-text);
  margin-bottom: 16px;
  letter-spacing: 0.06em;
}
.footer-nav a {
  display: block;
  font-size: 0.875rem;
  color: var(--color-text-sub);
  padding: 8px 0;
  transition: color var(--transition);
}
.footer-nav a:hover { color: var(--color-primary); }
.footer-contact p { font-size: 0.875rem; color: var(--color-text-sub); margin-bottom: 8px; }
.footer-bottom {
  border-top: 1px solid var(--color-border);
  padding-top: 32px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 13px;
  color: var(--color-text-sub);
}

/* === Modal === */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.65);
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
  z-index: 2000;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
  opacity: 0;
  visibility: hidden;
  transition: all 0.2s ease;
}
.modal-overlay.open { opacity: 1; visibility: visible; }
.modal-box {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: 20px;
  width: min(92vw, 500px);
  max-height: 90vh;
  overflow-y: auto;
  padding: 40px;
  position: relative;
  transform: scale(0.96) translateY(12px);
  transition: transform 0.25s cubic-bezier(0.4, 0, 0.2, 1);
}
.modal-overlay.open .modal-box { transform: scale(1) translateY(0); }
.modal-close {
  position: absolute;
  top: 16px;
  right: 16px;
  width: 40px;
  height: 40px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background var(--transition);
  font-size: 20px;
  color: var(--color-text-sub);
}
.modal-close:hover { background: var(--color-surface-2); color: var(--color-text); }
.modal-box h3 { font-family: var(--font-serif); font-size: 1.25rem; font-weight: 500; margin-bottom: 8px; }
.modal-sub { font-size: 0.875rem; color: var(--color-text-sub); margin-bottom: 32px; }
.form-group { margin-bottom: 20px; }
.form-group label { display: block; font-size: 12px; letter-spacing: 0.06em; color: var(--color-text-sub); margin-bottom: 8px; }
.form-input {
  width: 100%;
  height: 48px;
  background: var(--color-surface-2);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-btn);
  padding: 0 16px;
  font-size: 0.9375rem;
  color: var(--color-text);
  transition: all var(--transition);
}
.form-input::placeholder { color: rgba(167, 173, 180, 0.6); }
.form-input:focus { border-color: var(--color-primary); box-shadow: 0 0 0 3px rgba(197, 161, 92, 0.15); }
textarea.form-input { height: auto; min-height: 100px; padding: 12px 16px; resize: vertical; }
.form-privacy {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 12px;
  color: var(--color-text-sub);
  margin-top: 16px;
}
.form-privacy svg { width: 14px; height: 14px; flex-shrink: 0; stroke: var(--color-text-sub); }
.form-submit { width: 100%; margin-top: 8px; }
.success-block {
  background: rgba(78, 156, 148, 0.12);
  border: 1px solid rgba(78, 156, 148, 0.3);
  border-radius: var(--radius-lg);
  padding: 32px;
  text-align: center;
  display: none;
}
.success-block.visible { display: block; }
.success-icon {
  width: 48px;
  height: 48px;
  margin: 0 auto 16px;
  background: rgba(78, 156, 148, 0.2);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
}
.success-icon svg { width: 24px; height: 24px; stroke: var(--color-accent); }
.success-block p { font-size: 0.9375rem; color: var(--color-text); }

/* === Reveal animation === */
.reveal { opacity: 0; transform: translateY(16px); transition: opacity 0.6s ease, transform 0.6s cubic-bezier(0.4, 0, 0.2, 1); }
.reveal.visible { opacity: 1; transform: translateY(0); }
@media (prefers-reduced-motion: reduce) {
  * { animation: none !important; transition: none !important; }
  .reveal { opacity: 1; transform: none; }
}

/* === Responsive === */
@media (max-width: 1024px) {
  .nav-links { gap: 20px; }
  .intro-grid { gap: 40px; }
  .subcat-grid { gap: 24px; }
  .subcat-card { flex-direction: column; align-items: flex-start; }
  .subcat-thumb { width: 100%; height: 160px; }
}
@media (max-width: 768px) {
  .section { padding: 64px 0; }
  .nav-links { display: none; }
  .nav-cta { display: none; }
  .hamburger { display: flex; }
  .topbar-right .topbar-link { display: none; }
  .intro-grid { grid-template-columns: 1fr; gap: 32px; }
  .subcat-grid { grid-template-columns: 1fr; }
  .scenarios-grid { grid-template-columns: 1fr; gap: 12px; }
  .cta-flex { flex-direction: column; text-align: center; gap: 24px; }
  .footer-grid { grid-template-columns: 1fr; gap: 32px; }
  .footer-bottom { flex-direction: column; gap: 12px; text-align: center; }
  .cat-hero { padding: 80px 0 60px; min-height: 360px; }
  .cat-hero h1 { font-size: clamp(1.75rem, 5vw, 2.25rem); }
  .breadcrumb { flex-wrap: wrap; }
}
@media (max-width: 520px) {
  .container { padding: 0 16px; }
  .topbar { height: 44px; }
  .subcat-card { padding: 20px; }
  .scenario-item { padding: 16px 8px; }
  .modal-box { padding: 32px 24px; }
  .cta-banner { padding: 48px 0; }
}

/* roulang page: article */
:root {
    --color-bg: #0F1216;
    --color-surface: #161B22;
    --color-surface-2: #1C232C;
    --color-border: rgba(255,255,255,0.10);
    --color-text: #F1EFE9;
    --color-text-sub: #A7ADB4;
    --color-primary: #C5A15C;
    --color-primary-hover: #D8BD85;
    --color-accent: #4E9C94;
    --color-error: #D16B5A;
    --color-success: #3F9E7E;
    --font-serif: "Noto Serif SC","Source Han Serif SC","Songti SC",serif;
    --font-sans: "Noto Sans SC","Source Han Sans SC","Microsoft YaHei",sans-serif;
    --font-num: "Inter","DIN Alternate","Helvetica Neue",Arial,sans-serif;
    --radius-lg: 16px;
    --radius-md: 12px;
    --radius-sm: 10px;
    --shadow-card: 0 6px 28px rgba(0,0,0,0.28);
    --shadow-card-hover: 0 14px 44px rgba(0,0,0,0.38),0 0 0 1px rgba(197,161,92,0.18);
    --shadow-btn: 0 10px 30px rgba(197,161,92,0.28);
    --container-max: 1200px;
    --transition: cubic-bezier(0.4,0,0.2,1) 0.25s;
}

*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
    margin:0;
    background:var(--color-bg);
    color:var(--color-text);
    font-family:var(--font-sans);
    font-size:0.9375rem;
    line-height:1.7;
    -webkit-font-smoothing:antialiased;
    text-rendering:optimizeLegibility;
}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
button{font-family:inherit;cursor:pointer;border:none;background:none}
ul,ol{margin:0;padding:0}

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

:focus-visible{outline:2px solid var(--color-primary);outline-offset:3px;border-radius:4px}

/* ===== 顶部信息条 ===== */
.topbar{
    background:#0A0D10;
    border-bottom:1px solid var(--color-border);
    font-size:13px;
    height:48px;
    display:flex;
    align-items:center;
}
.topbar-inner{display:flex;width:100%;align-items:center;justify-content:space-between}
.topbar-domain{color:var(--color-text-sub);letter-spacing:.02em}
.topbar-links{display:flex;align-items:center;gap:24px}
.topbar-link{color:var(--color-text-sub);transition:color 0.25s var(--transition)}
.topbar-link:hover{color:var(--color-primary)}
.topbar-tel{color:var(--color-primary);font-weight:500}

/* ===== 主导航 ===== */
.site-header{
    position:sticky;
    top:0;
    z-index:100;
    height:76px;
    background:rgba(15,18,22,0.9);
    -webkit-backdrop-filter:blur(12px);
    backdrop-filter:blur(12px);
    border-bottom:1px solid var(--color-border);
}
.header-inner{
    height:76px;
    display:flex;
    align-items:center;
    justify-content:space-between;
    gap:28px;
}
.brand{display:flex;align-items:center;gap:12px;flex-shrink:0}
.brand-mark{
    width:36px;height:36px;
    border-radius:10px;
    background:
        radial-gradient(circle at 30% 30%,rgba(197,161,92,0.5),transparent 62%),
        linear-gradient(135deg,rgba(197,161,92,0.32),rgba(78,156,148,0.22));
    border:1px solid var(--color-border);
    position:relative;
}
.brand-mark::after{
    content:'';
    position:absolute;
    inset:8px;
    border-radius:5px;
    border:1px solid rgba(241,239,233,0.5);
}
.brand-name{
    font-family:var(--font-serif);
    font-weight:600;
    font-size:20px;
    letter-spacing:.02em;
    white-space:nowrap;
}
.nav-links{display:flex;align-items:center;gap:8px}
.nav-link{
    display:inline-block;
    padding:8px 14px;
    font-size:14px;
    color:var(--color-text-sub);
    position:relative;
    transition:color 0.25s var(--transition);
    white-space:nowrap;
}
.nav-link::after{
    content:'';
    position:absolute;
    bottom:0;
    left:50%;
    width:0;
    height:2px;
    background:var(--color-primary);
    transition:left 0.25s var(--transition),width 0.25s var(--transition);
}
.nav-link:hover{color:var(--color-text)}
.nav-link:hover::after{left:14px;width:calc(100% - 28px)}
.nav-link.active{color:var(--color-text)}
.nav-link.active::after{left:14px;width:calc(100% - 28px)}
.header-actions{display:flex;align-items:center;gap:12px}

/* ===== 按钮 ===== */
.btn{
    display:inline-flex;
    align-items:center;
    justify-content:center;
    gap:8px;
    padding:12px 28px;
    border-radius:var(--radius-sm);
    font-size:14px;
    font-weight:500;
    border:1px solid transparent;
    line-height:1;
    transition:all 0.25s var(--transition);
    user-select:none;
}
.btn-primary{
    background:var(--color-primary);
    color:#111821;
}
.btn-primary:hover{
    background:var(--color-primary-hover);
    color:#0F1216;
    box-shadow:var(--shadow-btn);
    transform:translateY(-1px);
}
.btn-primary:active{
    filter:brightness(0.95);
    transform:translateY(0);
}
.btn-outline{
    background:transparent;
    border-color:var(--color-border);
    color:var(--color-text);
}
.btn-outline:hover{
    border-color:var(--color-primary);
    color:var(--color-primary);
}
.btn-sm{padding:9px 20px;font-size:13px}
.btn-block{width:100%}

/* ===== 汉堡菜单 ===== */
.menu-toggle{
    display:none;
    width:42px;height:42px;
    border-radius:10px;
    background:var(--color-surface);
    border:1px solid var(--color-border);
    flex-direction:column;
    gap:5px;
    align-items:center;
    justify-content:center;
}
.menu-toggle span{width:20px;height:2px;background:var(--color-text);transition:transform 0.3s var(--transition),opacity 0.3s var(--transition)}

/* 移动端抽屉 */
.mobile-drawer{
    position:fixed;
    top:0;
    right:-340px;
    width:min(80vw,320px);
    height:100vh;
    background:var(--color-surface);
    z-index:200;
    padding:24px;
    display:flex;
    flex-direction:column;
    gap:14px;
    border-left:1px solid var(--color-border);
    transition:right 0.35s var(--transition);
}
.mobile-drawer.open{right:0}
.drawer-overlay{
    position:fixed;
    inset:0;
    background:rgba(0,0,0,0.6);
    z-index:150;
    opacity:0;
    pointer-events:none;
    transition:opacity 0.25s var(--transition);
}
.drawer-overlay.open{opacity:1;pointer-events:auto}
.drawer-header{
    display:flex;
    align-items:center;
    justify-content:space-between;
    padding-bottom:16px;
    border-bottom:1px solid var(--color-border);
}
.drawer-close{
    width:38px;height:38px;
    border-radius:50%;
    background:var(--color-surface-2);
    color:var(--color-text);
    font-size:18px;
    line-height:1;
    display:flex;
    align-items:center;
    justify-content:center;
    transition:background 0.2s;
}
.drawer-close:hover{background:var(--color-border)}
.drawer-nav{display:flex;flex-direction:column;gap:2px}
.drawer-link{
    padding:14px 10px;
    border-radius:10px;
    color:var(--color-text-sub);
    font-size:15px;
    border-bottom:1px solid var(--color-border);
    transition:background 0.2s,color 0.2s;
}
.drawer-link:hover,
.drawer-link.active{
    color:var(--color-primary);
    background:var(--color-surface-2);
}

/* ===== 文章横幅 ===== */
.article-banner{
    background:
        linear-gradient(100deg,rgba(15,18,22,0.92) 0%,rgba(15,18,22,0.76) 62%,rgba(15,18,22,0.5) 100%),
        url('/assets/images/backpic/back-1.png') center/cover no-repeat;
    border-bottom:1px solid var(--color-border);
    padding:56px 0 44px;
}
.article-banner .container{max-width:880px}

/* 面包屑 */
.breadcrumb{
    display:flex;
    flex-wrap:wrap;
    align-items:center;
    gap:10px;
    font-size:13px;
    color:var(--color-text-sub);
    margin-bottom:20px;
}
.breadcrumb a{color:rgba(197,161,92,0.85);transition:color 0.2s}
.breadcrumb a:hover{color:var(--color-primary-hover)}
.breadcrumb-sep{color:rgba(255,255,255,0.18);font-size:12px}
.breadcrumb-current{
    color:var(--color-text-sub);
    max-width:180px;
    overflow:hidden;
    text-overflow:ellipsis;
    white-space:nowrap;
}

.article-title{
    font-family:var(--font-serif);
    font-weight:600;
    font-size:clamp(1.55rem,3vw,2.4rem);
    line-height:1.32;
    margin:0 0 18px;
    letter-spacing:.01em;
    color:var(--color-text);
}
.article-meta{
    display:flex;
    flex-wrap:wrap;
    align-items:center;
    gap:8px;
    font-size:13px;
    color:var(--color-text-sub);
}
.meta-item{display:inline-flex;align-items:center}
.meta-item .label{opacity:.7;margin-right:4px}
.meta-dot{
    width:4px;height:4px;
    border-radius:50%;
    background:var(--color-primary);
    display:inline-block;
    margin:0 6px;
}

/* ===== 正文区域 ===== */
.article-main{padding-bottom:80px}
.article-wrapper{max-width:760px;margin:0 auto;padding:56px 0 0}

.article-cover{
    border-radius:var(--radius-md);
    overflow:hidden;
    border:1px solid var(--color-border);
    margin-bottom:40px;
    box-shadow:var(--shadow-card);
}
.article-cover img{width:100%;height:auto}

.article-body{
    font-size:0.9375rem;
    color:var(--color-text);
    line-height:1.7;
}
.article-body > *:first-child{margin-top:0}
.article-body > *:last-child{margin-bottom:0}

.article-body p{margin:0 0 1.5rem;line-height:1.75;text-align:justify}
.article-body h2{
    font-family:var(--font-serif);
    font-size:1.4rem;
    font-weight:600;
    line-height:1.4;
    padding:16px 0 10px;
    margin:2.25rem 0 1rem;
    border-bottom:1px solid var(--color-border);
    position:relative;
}
.article-body h2::before{
    content:'';
    position:absolute;
    bottom:-1px;
    left:0;
    width:56px;
    height:2px;
    background:var(--color-primary);
}
.article-body h3{
    font-family:var(--font-serif);
    font-size:1.15rem;
    font-weight:600;
    color:var(--color-primary);
    margin:1.8rem 0 .6rem;
}
.article-body blockquote{
    background:var(--color-surface);
    border-left:3px solid var(--color-primary);
    padding:1rem 1.5rem;
    color:var(--color-text-sub);
    border-radius:0 var(--radius-md) var(--radius-md) 0;
    margin:1.5rem 0;
}
.article-body blockquote p{margin-bottom:.5rem}
.article-body blockquote p:last-child{margin-bottom:0}
.article-body img{
    max-width:100%;
    border-radius:var(--radius-md);
    margin:1.5rem 0;
    border:1px solid var(--color-border);
}
.article-body ul,
.article-body ol{
    margin:1rem 0 1.5rem;
    padding-left:1.4em;
}
.article-body li{margin-bottom:.5rem}
.article-body a{
    color:var(--color-primary);
    text-decoration:underline;
    text-underline-offset:3px;
}
.article-body a:hover{color:var(--color-primary-hover)}
.article-body strong{color:var(--color-text);font-weight:600}
.article-body code{
    background:var(--color-surface-2);
    border:1px solid var(--color-border);
    border-radius:6px;
    padding:.2em .45em;
    font-size:.9em;
    font-family:"JetBrains Mono","SFMono-Regular",Consolas,monospace;
}
.article-body pre{
    background:var(--color-surface-2);
    border:1px solid var(--color-border);
    border-radius:var(--radius-md);
    padding:1.25rem;
    overflow-x:auto;
    margin:1.5rem 0;
}
.article-body pre code{background:none;border:none;padding:0}
.article-body table{
    width:100%;
    border-collapse:collapse;
    margin:1.5rem 0;
    font-size:.9rem;
}
.article-body th{
    background:var(--color-surface-2);
    border:1px solid var(--color-border);
    padding:.75rem 1rem;
    text-align:left;
    font-weight:500;
    color:var(--color-primary);
}
.article-body td{
    border:1px solid var(--color-border);
    padding:.7rem 1rem;
}
.article-body hr{
    border:none;
    border-top:1px solid var(--color-border);
    margin:2rem 0;
}

/* ===== 标签区 ===== */
.article-tags{
    display:flex;
    flex-wrap:wrap;
    gap:10px;
    margin:44px 0 0;
    padding-top:24px;
    border-top:1px solid var(--color-border);
}
.tag{
    display:inline-flex;
    align-items:center;
    padding:6px 16px;
    border:1px solid rgba(197,161,92,0.55);
    border-radius:999px;
    font-size:12px;
    color:var(--color-primary);
    transition:background 0.2s,border-color 0.2s;
}
.tag:hover{background:rgba(197,161,92,0.1);border-color:var(--color-primary)}

/* ===== 文章导航 ===== */
.post-navigation{
    display:flex;
    align-items:center;
    justify-content:space-between;
    gap:20px;
    margin:44px 0 0;
    padding:24px 0;
    border-top:1px solid var(--color-border);
    border-bottom:1px solid var(--color-border);
}
.post-nav-side{flex:1;display:flex;min-width:0}
.post-nav-side.next{justify-content:flex-end}
.post-nav-link{
    display:flex;
    flex-direction:column;
    gap:6px;
    color:var(--color-text-sub);
    transition:color 0.25s;
    max-width:100%;
}
.post-nav-link:hover{color:var(--color-primary)}
.post-nav-label{font-size:12px;color:var(--color-text-sub);opacity:.7}
.post-nav-title{
    font-size:14px;
    font-weight:500;
    color:var(--color-text);
    max-width:200px;
    overflow:hidden;
    text-overflow:ellipsis;
    white-space:nowrap;
    transition:color 0.25s;
}
.post-nav-link:hover .post-nav-title{color:var(--color-primary)}
.post-nav-placeholder{visibility:hidden}
.back-to-list{
    flex-shrink:0;
    font-size:13px;
    color:var(--color-primary);
    border:1px solid rgba(197,161,92,0.5);
    border-radius:999px;
    padding:9px 20px;
    transition:background 0.25s,border-color 0.25s;
}
.back-to-list:hover{background:rgba(197,161,92,0.12);border-color:var(--color-primary)}

/* ===== 相关推荐 ===== */
.related-posts{margin-top:64px}
.related-posts .section-header{
    display:flex;
    align-items:center;
    margin-bottom:24px;
}
.related-posts .section-header h2{
    font-family:var(--font-serif);
    font-size:1.4rem;
    font-weight:600;
    margin:0;
    padding-left:16px;
    border-left:3px solid var(--color-primary);
}
.related-grid{
    display:grid;
    grid-template-columns:repeat(3,1fr);
    gap:20px;
    max-width:960px;
    margin-left:auto;
    margin-right:auto;
}
.related-card{
    display:flex;
    align-items:stretch;
    background:var(--color-surface);
    border:1px solid var(--color-border);
    border-radius:var(--radius-md);
    overflow:hidden;
    transition:border-color 0.25s var(--transition),box-shadow 0.25s var(--transition),transform 0.25s var(--transition);
}
.related-card:hover{
    border-color:rgba(197,161,92,0.5);
    box-shadow:var(--shadow-card-hover);
    transform:translateY(-2px);
}
.related-thumb{
    flex:0 0 100px;
    width:100px;
    overflow:hidden;
    background:var(--color-surface-2);
}
.related-thumb img{
    width:100%;
    height:100%;
    object-fit:cover;
    transition:transform 0.4s var(--transition);
}
.related-card:hover .related-thumb img{transform:scale(1.04)}
.related-info{
    padding:14px 16px;
    display:flex;
    flex-direction:column;
    gap:6px;
    min-width:0;
}
.related-info h3{
    font-size:.9rem;
    font-weight:500;
    line-height:1.45;
    margin:0;
    overflow:hidden;
    text-overflow:ellipsis;
    display:-webkit-box;
    -webkit-line-clamp:2;
    -webkit-box-orient:vertical;
    color:var(--color-text);
}
.related-info p{
    font-size:.75rem;
    color:var(--color-text-sub);
    margin:0;
    overflow:hidden;
    text-overflow:ellipsis;
    display:-webkit-box;
    -webkit-line-clamp:2;
    -webkit-box-orient:vertical;
    line-height:1.5;
}
.related-date{
    font-size:11px;
    color:var(--color-text-sub);
    opacity:.7;
    margin-top:auto;
}

/* ===== 空状态 ===== */
.article-empty{
    text-align:center;
    background:var(--color-surface);
    border:1px dashed rgba(197,161,92,0.4);
    border-radius:var(--radius-lg);
    padding:80px 24px;
    margin:48px auto 0;
    max-width:640px;
}
.article-empty .empty-icon{
    font-size:3rem;
    color:var(--color-primary);
    display:block;
    margin-bottom:14px;
    line-height:1;
}
.article-empty h1{
    font-family:var(--font-serif);
    font-size:1.25rem;
    margin:0 0 12px;
    color:var(--color-text);
    font-weight:600;
}
.article-empty p{color:var(--color-text-sub);margin:0 0 24px;font-size:14px}

/* ===== 页脚 ===== */
.footer{
    background:#0A0D10;
    border-top:1px solid var(--color-border);
    padding:64px 0 32px;
    margin-top:40px;
}
.footer-grid{
    display:grid;
    grid-template-columns:1.4fr 1fr 1fr;
    gap:48px;
    margin-bottom:48px;
}
.footer-brand .brand-name{
    font-family:var(--font-serif);
    font-weight:600;
    font-size:20px;
    display:block;
    margin-bottom:12px;
}
.footer-brand p{
    font-size:14px;
    color:var(--color-text-sub);
    line-height:1.7;
    margin:0;
}
.footer-nav h3,
.footer-contact h3{
    font-size:14px;
    color:var(--color-text);
    font-weight:500;
    margin:0 0 16px;
}
.footer-nav a{
    display:block;
    padding:6px 0;
    font-size:14px;
    color:var(--color-text-sub);
    transition:color 0.2s;
}
.footer-nav a:hover{color:var(--color-primary)}
.footer-contact p{
    font-size:14px;
    color:var(--color-text-sub);
    margin:0 0 10px;
}
.footer-bottom{
    border-top:1px solid var(--color-border);
    padding-top:24px;
    display:flex;
    justify-content:space-between;
    flex-wrap:wrap;
    gap:8px;
    font-size:13px;
    color:var(--color-text-sub);
}

/* ===== 弹层 ===== */
.modal-overlay{
    position:fixed;
    inset:0;
    background:rgba(0,0,0,0.65);
    -webkit-backdrop-filter:blur(6px);
    backdrop-filter:blur(6px);
    z-index:300;
    display:flex;
    align-items:center;
    justify-content:center;
    padding:20px;
    opacity:0;
    pointer-events:none;
    transition:opacity 0.2s ease;
}
.modal-overlay.open{opacity:1;pointer-events:auto}
.modal-panel{
    background:var(--color-surface);
    border:1px solid var(--color-border);
    border-radius:20px;
    width:min(92vw,440px);
    padding:40px 32px;
    box-shadow:0 24px 64px rgba(0,0,0,0.5);
    transform:scale(0.96) translateY(12px);
    transition:transform 0.3s var(--transition);
    max-height:90vh;
    overflow-y:auto;
    position:relative;
}
.modal-overlay.open .modal-panel{transform:scale(1) translateY(0)}
.modal-close{
    position:absolute;
    top:18px;
    right:18px;
    width:40px;
    height:40px;
    border-radius:50%;
    background:var(--color-surface-2);
    color:var(--color-text-sub);
    font-size:18px;
    display:flex;
    align-items:center;
    justify-content:center;
    transition:background 0.2s,color 0.25s;
}
.modal-close:hover{background:var(--color-border);color:var(--color-text)}
.modal-panel h3{
    font-family:var(--font-serif);
    font-size:1.3rem;
    margin:0 0 8px;
}
.modal-panel > p{
    color:var(--color-text-sub);
    font-size:14px;
    margin:0 0 24px;
}
.modal-panel form{display:flex;flex-direction:column;gap:16px}
.form-field{display:flex;flex-direction:column;gap:6px}
.form-field label{
    font-size:12px;
    color:var(--color-text-sub);
    letter-spacing:.06em;
}
.form-field input,
.form-field textarea{
    background:var(--color-surface-2);
    border:1px solid var(--color-border);
    border-radius:var(--radius-sm);
    height:48px;
    padding:0 16px;
    color:var(--color-text);
    font-size:14px;
    outline:none;
    transition:border-color 0.25s,box-shadow 0.25s;
    font-family:inherit;
    width:100%;
}
.form-field textarea{
    height:auto;
    min-height:120px;
    padding:12px 16px;
    resize:vertical;
}
.form-field input:focus,
.form-field textarea:focus{
    border-color:var(--color-primary);
    box-shadow:0 0 0 3px rgba(197,161,92,0.15);
}
.form-field input::placeholder,
.form-field textarea::placeholder{
    color:rgba(167,173,180,0.55);
}
.privacy-note{
    font-size:12px;
    color:var(--color-text-sub);
    display:flex;
    align-items:center;
    gap:6px;
    margin:4px 0 0;
}
.privacy-icon{
    width:14px;
    height:14px;
    border-radius:4px;
    border:1px solid rgba(167,173,180,0.5);
    display:inline-block;
    position:relative;
    flex-shrink:0;
}
.privacy-icon::after{
    content:'';
    position:absolute;
    left:3px;
    top:6px;
    width:6px;
    height:3px;
    border-left:1.5px solid var(--color-accent);
    border-bottom:1.5px solid var(--color-accent);
    transform:rotate(-45deg);
}
.form-success{display:none;text-align:center;padding:32px 0}
.form-success .success-icon{
    width:56px;
    height:56px;
    border-radius:50%;
    background:rgba(63,158,126,0.12);
    color:var(--color-success);
    display:inline-flex;
    align-items:center;
    justify-content:center;
    font-size:26px;
    margin-bottom:16px;
}
.form-success p{color:var(--color-text);font-size:15px;margin:0}
.modal-panel.show-success form{display:none}
.modal-panel.show-success .form-success{display:block}

/* ===== 动效 ===== */
[data-fade]{
    opacity:0;
    transform:translateY(16px);
    transition:opacity 0.7s var(--transition),transform 0.7s var(--transition);
}
[data-fade].visible{opacity:1;transform:translateY(0)}

@media (prefers-reduced-motion: reduce){
    *,*::before,*::after{
        transition:none !important;
        animation:none !important;
    }
    html{scroll-behavior:auto}
    [data-fade]{opacity:1;transform:none}
}

/* ===== 响应式 ===== */
@media (max-width:1024px){
    .related-grid{grid-template-columns:repeat(2,1fr);max-width:100%}
    .related-card:last-child{display:none}
    .footer-grid{gap:32px}
}

@media (max-width:768px){
    .container{padding:0 16px}
    .topbar-links .topbar-mail{display:none}
    .nav-links{display:none}
    .menu-toggle{display:flex}
    .header-actions .btn{display:none}
    .article-banner{padding:40px 0 32px}
    .article-wrapper{padding-top:40px}
    .footer-grid{grid-template-columns:1fr;gap:32px}
    .related-grid{grid-template-columns:1fr}
    .related-card:last-child{display:flex}
    .post-navigation{flex-direction:column;align-items:stretch}
    .back-to-list{order:-1;align-self:flex-start}
    .post-nav-side.next{justify-content:flex-start}
    .modal-panel{padding:32px 20px}
}

@media (max-width:520px){
    .topbar-domain{display:none}
    .topbar-tel{font-size:12px}
    .brand-name{font-size:18px}
    .topbar-links{gap:0}
    .breadcrumb-current{max-width:130px}
    .related-thumb{flex-basis:80px;width:80px}
    .article-meta{font-size:12px;gap:4px}
    .article-meta .meta-item.hide-mobile{display:none}
}