/* roulang page: index */
:root {
  --bg: #0A111E;
  --bg-deep: #060A11;
  --panel: rgba(255, 255, 255, 0.05);
  --panel-border: rgba(255, 255, 255, 0.08);
  --text-strong: #E6EDF6;
  --text-sub: #A0AFC2;
  --text-dim: #6B7A8D;
  --accent: #38BDF8;
  --cyan: #22D3EE;
  --amber: #F59E0B;
  --success: #10B981;
  --danger: #EF4444;
  --radius-lg: 16px;
  --radius-md: 12px;
  --radius-sm: 10px;
  --radius-pill: 999px;
  --shadow-card: 0 8px 24px rgba(0, 0, 0, 0.2);
  --shadow-lift: 0 16px 40px rgba(0, 0, 0, 0.35), 0 0 0 1px rgba(56, 189, 248, 0.3);
  --glow-amber: 0 0 12px rgba(245, 158, 11, 0.4), 0 4px 14px rgba(245, 158, 11, 0.2);
  --transition: 180ms ease-out;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: radial-gradient(ellipse at 20% 10%, #101F33 0%, #0A111E 60%, #070C14 100%);
  color: var(--text-strong);
  font-family: "Inter", "PingFang SC", "Microsoft YaHei", "Noto Sans SC", system-ui, sans-serif;
  font-size: 17px;
  line-height: 1.8;
  -webkit-font-smoothing: antialiased;
}

a {
  color: inherit;
  text-decoration: none;
}

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

button,
input,
textarea {
  font-family: inherit;
  font-size: inherit;
  color: inherit;
}

button {
  cursor: pointer;
}

:focus-visible {
  outline: 2px solid #22D3EE;
  outline-offset: 2px;
}

.container {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 32px;
}

.section {
  padding: 80px 32px;
}

.section-inner {
  max-width: 1280px;
  margin: 0 auto;
}

.section-header {
  margin-bottom: 40px;
}

.section-header h2 {
  font-size: 30px;
  line-height: 1.25;
  font-weight: 700;
  margin: 0 0 10px;
  letter-spacing: 0.01em;
}

.section-header p {
  margin: 0;
  font-size: 15px;
  color: var(--text-sub);
  max-width: 640px;
}

.app-sidebar {
  position: fixed;
  top: 0;
  left: 0;
  width: 224px;
  height: 100vh;
  background: rgba(6, 10, 17, 0.82);
  border-right: 1px solid rgba(255, 255, 255, 0.06);
  backdrop-filter: blur(16px);
  display: flex;
  flex-direction: column;
  padding: 28px 18px 24px;
  z-index: 120;
}

.brand-block {
  padding: 0 10px 24px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.07);
}

.brand-link {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 20px;
  font-weight: 700;
  letter-spacing: 0.02em;
  color: #fff;
}

.brand-icon {
  width: 34px;
  height: 34px;
  border-radius: 10px;
  background: rgba(56, 189, 248, 0.12);
  border: 1px solid rgba(56, 189, 248, 0.45);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--accent);
  flex-shrink: 0;
}

.brand-accent {
  background: linear-gradient(135deg, #22D3EE, #F59E0B);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

.brand-sub {
  font-size: 12px;
  color: var(--text-sub);
  margin-top: 8px;
  letter-spacing: 0.04em;
}

.side-nav {
  margin-top: 22px;
  display: flex;
  flex-direction: column;
  gap: 6px;
  flex: 1;
}

.nav-link {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 14px;
  border-radius: 12px;
  font-size: 15px;
  font-weight: 500;
  color: var(--text-sub);
  border-left: 2px solid transparent;
  transition: background var(--transition), border-color var(--transition), color var(--transition);
}

.nav-link:hover {
  background: rgba(255, 255, 255, 0.04);
  border-left-color: var(--cyan);
  color: #fff;
}

.nav-link.active {
  background: rgba(245, 158, 11, 0.1);
  border-left-color: var(--amber);
  color: #fff;
}

.side-footer {
  padding-top: 18px;
  border-top: 1px solid rgba(255, 255, 255, 0.07);
}

.btn-login {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 16px;
  border-radius: 12px;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(245, 158, 11, 0.5);
  color: #E6EDF6;
  font-size: 14px;
  font-weight: 600;
  transition: background var(--transition), box-shadow var(--transition), transform var(--transition);
}

.btn-login:hover {
  background: rgba(245, 158, 11, 0.12);
  box-shadow: 0 0 12px rgba(245, 158, 11, 0.2);
}

.btn-login:active {
  transform: scale(0.98);
}

.mobile-header {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: 64px;
  background: rgba(10, 17, 30, 0.85);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
  align-items: center;
  justify-content: space-between;
  padding: 0 20px;
  z-index: 130;
}

.mobile-brand {
  font-size: 20px;
  font-weight: 700;
  color: #fff;
}

.mobile-brand span {
  background: linear-gradient(135deg, #22D3EE, #F59E0B);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

.mobile-toggle {
  background: transparent;
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: 10px;
  width: 42px;
  height: 42px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #E6EDF6;
}

.mobile-drawer {
  position: fixed;
  top: 64px;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(6, 10, 17, 0.98);
  z-index: 110;
  display: flex;
  flex-direction: column;
  padding: 32px 24px 40px;
  transform: translateX(100%);
  transition: transform 0.2s ease-out;
  overflow-y: auto;
}

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

.drawer-link {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 16px 8px;
  font-size: 20px;
  font-weight: 600;
  color: var(--text-sub);
  border-bottom: 1px solid rgba(255, 255, 255, 0.07);
}

.drawer-link.active {
  color: #fff;
}

.drawer-footer {
  margin-top: auto;
  display: flex;
  flex-direction: column;
  gap: 14px;
  padding-top: 24px;
}

body.no-scroll {
  overflow: hidden;
}

.app-main {
  margin-left: 224px;
  min-height: 100vh;
}

.hero {
  background-image: linear-gradient(rgba(10, 17, 30, 0.76), rgba(10, 17, 30, 0.88)), url('/assets/images/backpic/back-1.png');
  background-size: cover;
  background-position: center;
  padding: 110px 32px 96px;
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: "";
  position: absolute;
  top: -120px;
  right: -120px;
  width: 420px;
  height: 420px;
  background: radial-gradient(circle, rgba(56, 189, 248, 0.22), transparent 65%);
  pointer-events: none;
}

.hero::after {
  content: "";
  position: absolute;
  bottom: -80px;
  left: 10%;
  width: 260px;
  height: 260px;
  background: radial-gradient(circle, rgba(245, 158, 11, 0.12), transparent 65%);
  pointer-events: none;
}

.hero-inner {
  position: relative;
  z-index: 1;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 7px 14px;
  border-radius: 999px;
  background: rgba(34, 211, 238, 0.1);
  border: 1px solid rgba(34, 211, 238, 0.4);
  color: var(--cyan);
  font-size: 13px;
  font-weight: 500;
  margin-bottom: 20px;
}

.hero h1 {
  font-size: 54px;
  line-height: 1.15;
  font-weight: 700;
  letter-spacing: -0.01em;
  margin: 0 0 18px;
  color: #fff;
}

.hero-sub {
  font-size: 18px;
  color: var(--text-sub);
  margin: 0 0 32px;
  max-width: 520px;
  line-height: 1.7;
}

.hero-visual {
  position: relative;
  border-radius: 20px;
  overflow: hidden;
  border: 1px solid rgba(255, 255, 255, 0.12);
  box-shadow: 0 24px 60px rgba(0, 0, 0, 0.35);
}

.hero-visual img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  min-height: 420px;
}

.ticker-section {
  padding: 28px 32px;
  background: rgba(10, 17, 30, 0.6);
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
}

.ticker-inner {
  max-width: 1280px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 14px 22px;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: 16px;
}

.ticker-dot {
  width: 8px;
  height: 8px;
  border-radius: 999px;
  background: var(--cyan);
  box-shadow: 0 0 10px var(--cyan);
  flex-shrink: 0;
}

.ticker-label {
  flex-shrink: 0;
  font-size: 13px;
  font-weight: 600;
  color: var(--cyan);
  background: rgba(34, 211, 238, 0.1);
  border: 1px solid rgba(34, 211, 238, 0.3);
  padding: 5px 12px;
  border-radius: 999px;
}

.ticker-text {
  font-size: 15px;
  color: var(--text-sub);
  margin: 0;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.stats-section {
  padding: 72px 32px 40px;
}

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

.stat-card {
  background: var(--panel);
  border: 1px solid var(--panel-border);
  backdrop-filter: blur(14px);
  border-radius: var(--radius-lg);
  padding: 28px 24px;
  text-align: center;
  box-shadow: var(--shadow-card);
  transition: transform var(--transition), box-shadow var(--transition);
}

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

.stat-num {
  font-size: 36px;
  font-weight: 700;
  line-height: 1.1;
  color: #fff;
  letter-spacing: -0.02em;
  font-variant-numeric: tabular-nums;
  margin-bottom: 8px;
}

.stat-num span {
  color: var(--cyan);
}

.stat-label {
  font-size: 14px;
  color: var(--text-sub);
}

.timeline-section {
  padding: 80px 32px;
}

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

.step-card {
  position: relative;
  background: var(--panel);
  border: 1px solid var(--panel-border);
  backdrop-filter: blur(14px);
  border-radius: var(--radius-lg);
  padding: 28px 24px;
  box-shadow: var(--shadow-card);
  transition: transform var(--transition), box-shadow var(--transition);
}

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

.step-card::before {
  content: "";
  position: absolute;
  top: 30px;
  right: 100%;
  width: 24px;
  border-top: 1px dashed rgba(255, 255, 255, 0.18);
}

.step-card:first-child::before {
  display: none;
}

.step-num {
  width: 40px;
  height: 40px;
  border-radius: 999px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 16px;
  font-weight: 700;
  margin-bottom: 16px;
  background: rgba(255, 255, 255, 0.07);
  border: 1px solid rgba(255, 255, 255, 0.12);
  color: var(--text-dim);
}

.step-card.done .step-num {
  background: rgba(34, 211, 238, 0.14);
  border-color: rgba(34, 211, 238, 0.5);
  color: var(--cyan);
}

.step-card.current .step-num {
  background: rgba(245, 158, 11, 0.18);
  border-color: var(--amber);
  color: var(--amber);
  box-shadow: 0 0 14px rgba(245, 158, 11, 0.4);
}

.step-title {
  font-size: 18px;
  font-weight: 600;
  margin: 0 0 8px;
  color: #fff;
}

.step-desc {
  font-size: 14px;
  color: var(--text-sub);
  margin: 0 0 14px;
  line-height: 1.65;
}

.step-status {
  display: inline-block;
  font-size: 12px;
  padding: 3px 10px;
  border-radius: 999px;
  font-weight: 500;
}

.status-done {
  color: var(--cyan);
  border: 1px solid rgba(34, 211, 238, 0.5);
  background: rgba(34, 211, 238, 0.08);
}

.status-current {
  color: var(--amber);
  border: 1px solid rgba(245, 158, 11, 0.55);
  background: rgba(245, 158, 11, 0.1);
  box-shadow: 0 0 10px rgba(245, 158, 11, 0.25);
}

.status-todo {
  color: var(--text-dim);
  border: 1px solid rgba(255, 255, 255, 0.12);
  background: rgba(255, 255, 255, 0.04);
}

.features-section {
  padding: 80px 32px;
}

.feature-grid {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: 24px;
}

.feature-large {
  grid-column: span 4;
  grid-row: span 2;
}

.feature-col {
  grid-column: span 2;
  grid-row: span 2;
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.feature-mid {
  grid-column: span 3;
}

.glass-card {
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.06), transparent), var(--panel);
  border: 1px solid var(--panel-border);
  backdrop-filter: blur(14px);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-card);
  overflow: hidden;
  transition: transform var(--transition), box-shadow var(--transition);
}

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

.feature-media img {
  width: 100%;
  height: 180px;
  object-fit: cover;
  border-radius: 0;
}

.feature-large .feature-media img {
  height: 260px;
}

.feature-body {
  padding: 26px 28px;
}

.feature-body h3 {
  font-size: 21px;
  font-weight: 600;
  margin: 0 0 10px;
  color: #fff;
}

.feature-body p {
  font-size: 15px;
  line-height: 1.75;
  color: var(--text-sub);
  margin: 0;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.feature-icon {
  width: 44px;
  height: 44px;
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(56, 189, 248, 0.12);
  border: 1px solid rgba(56, 189, 248, 0.3);
  color: var(--accent);
  margin-bottom: 18px;
}

.pricing-section {
  padding: 80px 32px;
}

.table-scroll {
  overflow-x: auto;
  border-radius: var(--radius-lg);
}

.version-table {
  width: 100%;
  min-width: 720px;
  border-collapse: separate;
  border-spacing: 0;
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: var(--radius-lg);
  overflow: hidden;
}

.version-table th,
.version-table td {
  padding: 14px 18px;
  text-align: center;
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
  font-size: 15px;
  vertical-align: middle;
  min-height: 44px;
}

.version-table th {
  font-size: 18px;
  font-weight: 600;
  color: #fff;
  background: rgba(255, 255, 255, 0.04);
}

.version-table th:first-child,
.version-table td:first-child {
  text-align: left;
}

.version-table tr:last-child th,
.version-table tr:last-child td {
  border-bottom: none;
}

.version-name {
  font-size: 21px;
  font-weight: 700;
}

.version-desc {
  font-size: 13px;
  color: var(--text-sub);
  margin-top: 4px;
}

.recommend-col {
  background: rgba(245, 158, 11, 0.07);
  border-left: 1px solid rgba(245, 158, 11, 0.3);
  border-right: 1px solid rgba(245, 158, 11, 0.3);
  position: relative;
}

.version-tag {
  display: inline-block;
  font-size: 12px;
  font-weight: 600;
  color: var(--amber);
  background: rgba(245, 158, 11, 0.14);
  border: 1px solid rgba(245, 158, 11, 0.5);
  border-radius: 999px;
  padding: 2px 10px;
  margin-bottom: 10px;
}

.ic-check,
.ic-minus {
  width: 20px;
  height: 20px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 999px;
}

.ic-check {
  color: var(--success);
  background: rgba(16, 185, 129, 0.12);
}

.ic-minus {
  color: var(--text-dim);
  background: rgba(255, 255, 255, 0.05);
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  border-radius: var(--radius-md);
  font-weight: 600;
  font-size: 15px;
  line-height: 1;
  padding: 14px 24px;
  border: 1px solid transparent;
  transition: all var(--transition);
  text-decoration: none;
  cursor: pointer;
  white-space: nowrap;
}

.btn:active {
  transform: scale(0.98);
}

.btn-amber {
  background: var(--amber);
  color: #0A111E;
  box-shadow: var(--glow-amber);
}

.btn-amber:hover {
  background: #FBBF24;
  box-shadow: 0 0 18px rgba(245, 158, 11, 0.55), 0 6px 18px rgba(245, 158, 11, 0.28);
  filter: brightness(1.06);
}

.btn-glass {
  background: rgba(255, 255, 255, 0.05);
  border-color: rgba(255, 255, 255, 0.14);
  color: #E6EDF6;
  backdrop-filter: blur(8px);
}

.btn-glass:hover {
  background: rgba(255, 255, 255, 0.1);
  border-color: rgba(255, 255, 255, 0.24);
}

.btn-cyan {
  background: rgba(34, 211, 238, 0.12);
  border-color: rgba(34, 211, 238, 0.5);
  color: var(--cyan);
}

.btn-cyan:hover {
  background: rgba(34, 211, 238, 0.2);
  box-shadow: 0 0 14px rgba(34, 211, 238, 0.25);
}

.btn-gray {
  background: rgba(255, 255, 255, 0.05);
  border-color: rgba(255, 255, 255, 0.1);
  color: var(--text-sub);
}

.btn-gray:hover {
  color: #fff;
  background: rgba(255, 255, 255, 0.1);
}

.cta-section {
  padding: 80px 32px;
  background-image: linear-gradient(rgba(10, 17, 30, 0.82), rgba(10, 17, 30, 0.92)), url('/assets/images/backpic/back-2.webp');
  background-size: cover;
  background-position: center;
}

.cta-panel {
  background: rgba(10, 17, 30, 0.7);
  border: 1px solid rgba(255, 255, 255, 0.1);
  backdrop-filter: blur(16px);
  border-radius: 20px;
  overflow: hidden;
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
}

.cta-copy {
  padding: 48px 44px;
}

.cta-copy h2 {
  font-size: 32px;
  font-weight: 700;
  line-height: 1.25;
  margin: 0 0 16px;
  color: #fff;
}

.cta-copy p {
  font-size: 16px;
  color: var(--text-sub);
  margin: 0 0 26px;
  max-width: 440px;
}

.cta-points {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.cta-points li {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 15px;
  color: var(--text-strong);
}

.cta-point-icon {
  width: 20px;
  height: 20px;
  border-radius: 999px;
  background: rgba(34, 211, 238, 0.12);
  border: 1px solid rgba(34, 211, 238, 0.4);
  color: var(--cyan);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.cta-form-wrap {
  padding: 44px;
  background: rgba(255, 255, 255, 0.04);
  border-left: 1px solid rgba(255, 255, 255, 0.08);
}

.form-label {
  display: block;
  font-size: 13px;
  color: var(--text-sub);
  margin-bottom: 6px;
}

.form-control {
  width: 100%;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: 10px;
  padding: 12px 14px;
  color: #E6EDF6;
  font-size: 15px;
  margin-bottom: 18px;
  transition: border-color var(--transition), box-shadow var(--transition);
}

.form-control::placeholder {
  color: rgba(160, 175, 194, 0.65);
}

.form-control:focus {
  outline: none;
  border-color: var(--cyan);
  box-shadow: 0 0 0 3px rgba(34, 211, 238, 0.15);
}

textarea.form-control {
  min-height: 88px;
  resize: vertical;
}

.form-success {
  text-align: center;
  padding: 60px 20px;
}

.form-success .success-icon {
  width: 56px;
  height: 56px;
  border-radius: 999px;
  background: rgba(16, 185, 129, 0.12);
  border: 1px solid rgba(16, 185, 129, 0.5);
  color: var(--success);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 24px;
  margin: 0 auto 18px;
}

.form-success h3 {
  font-size: 22px;
  margin: 0 0 10px;
  color: #fff;
}

.form-success p {
  font-size: 15px;
  color: var(--text-sub);
  margin: 0;
}

.latest-section {
  padding: 80px 32px;
}

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

.post-item {
  display: flex;
  align-items: center;
  gap: 24px;
  padding: 20px 16px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
  border-radius: 12px;
  transition: background var(--transition);
}

.post-item:hover {
  background: rgba(255, 255, 255, 0.03);
}

.post-item:hover .post-title {
  color: var(--cyan);
}

.post-item:hover .post-arrow {
  transform: translateX(4px);
}

.post-date {
  writing-mode: vertical-rl;
  text-orientation: mixed;
  font-size: 12px;
  line-height: 1.5;
  color: var(--text-dim);
  letter-spacing: 0.1em;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(255, 255, 255, 0.06);
  border-radius: 10px;
  padding: 10px 6px;
  min-height: 56px;
  flex-shrink: 0;
}

.post-main {
  flex: 1;
  min-width: 0;
}

.post-title {
  font-size: 18px;
  font-weight: 600;
  color: #fff;
  margin: 0 0 8px;
  transition: color var(--transition);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.post-excerpt {
  font-size: 14px;
  color: var(--text-sub);
  margin: 0;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.post-meta {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-shrink: 0;
}

.tag {
  display: inline-block;
  font-size: 12px;
  font-weight: 500;
  padding: 4px 10px;
  border-radius: 999px;
}

.tag-cyan {
  color: var(--cyan);
  border: 1px solid rgba(34, 211, 238, 0.45);
  background: rgba(34, 211, 238, 0.08);
}

.post-arrow {
  width: 28px;
  height: 28px;
  border-radius: 999px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(255, 255, 255, 0.05);
  color: var(--text-sub);
  transition: transform var(--transition), color var(--transition), background var(--transition);
}

.post-item:hover .post-arrow {
  color: var(--cyan);
  background: rgba(34, 211, 238, 0.1);
}

.empty-state {
  text-align: center;
  padding: 56px 24px;
  border: 1px dashed rgba(255, 255, 255, 0.2);
  border-radius: var(--radius-lg);
  background: rgba(255, 255, 255, 0.02);
  color: var(--text-sub);
  font-size: 15px;
}

.empty-state .empty-icon {
  font-size: 28px;
  margin-bottom: 10px;
  display: block;
  color: var(--text-dim);
}

.faq-section {
  padding: 80px 32px;
}

.faq-list {
  max-width: 860px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.faq-item {
  background: var(--panel);
  border: 1px solid var(--panel-border);
  backdrop-filter: blur(14px);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-card);
  transition: box-shadow var(--transition);
}

.faq-item[open] {
  box-shadow: var(--shadow-lift);
}

.faq-item summary {
  list-style: none;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 22px 26px;
  font-size: 17px;
  font-weight: 600;
  color: #fff;
  cursor: pointer;
  user-select: none;
}

.faq-item summary::-webkit-details-marker {
  display: none;
}

.faq-arrow {
  width: 28px;
  height: 28px;
  border-radius: 999px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(255, 255, 255, 0.06);
  color: var(--text-sub);
  flex-shrink: 0;
  transition: transform var(--transition), color var(--transition);
}

.faq-item[open] .faq-arrow {
  transform: rotate(180deg);
  color: var(--amber);
}

.faq-body {
  padding: 0 26px 24px;
  font-size: 16px;
  line-height: 1.75;
  color: var(--text-sub);
}

.faq-body p {
  margin: 0;
}

.site-footer {
  background: var(--bg-deep);
  border-top: 1px solid rgba(255, 255, 255, 0.06);
  padding: 56px 32px 28px;
}

.footer-grid {
  max-width: 1280px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1.4fr 0.8fr 1fr;
  gap: 48px;
  margin-bottom: 36px;
}

.footer-brand {
  font-size: 22px;
  font-weight: 700;
  color: #fff;
  margin-bottom: 12px;
}

.footer-about {
  font-size: 14px;
  line-height: 1.75;
  color: var(--text-sub);
  margin: 0;
  max-width: 380px;
}

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

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

.footer-links a {
  font-size: 14px;
  color: var(--text-sub);
  transition: color var(--transition);
}

.footer-links a:hover {
  color: var(--cyan);
}

.footer-contact {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 10px;
  font-size: 14px;
  color: var(--text-sub);
}

.footer-contact li {
  display: flex;
  align-items: center;
  gap: 10px;
}

.footer-bottom {
  max-width: 1280px;
  margin: 0 auto;
  padding-top: 22px;
  border-top: 1px solid rgba(255, 255, 255, 0.06);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
}

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

.footer-icp a {
  color: var(--text-dim);
  font-size: 13px;
}

.footer-icp a:hover {
  color: var(--text-sub);
}

@media (max-width: 1200px) {
  .hero h1 {
    font-size: 44px;
  }
}

@media (max-width: 1024px) {
  .app-sidebar {
    width: 180px;
    padding: 22px 14px 18px;
  }

  .app-main {
    margin-left: 180px;
  }

  .section {
    padding: 64px 24px;
  }

  .hero {
    padding: 80px 24px 70px;
  }

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

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

  .step-card:nth-child(2)::before {
    display: none;
  }

  .feature-grid {
    grid-template-columns: repeat(4, 1fr);
  }

  .feature-large {
    grid-column: span 4;
    grid-row: auto;
  }

  .feature-col {
    grid-column: span 4;
    grid-row: auto;
  }

  .feature-mid {
    grid-column: span 2;
  }

  .cta-form-wrap {
    border-left: 0;
    border-top: 1px solid rgba(255, 255, 255, 0.08);
  }

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

@media (max-width: 768px) {
  .app-sidebar {
    display: none;
  }

  .mobile-header {
    display: flex;
  }

  .app-main {
    margin-left: 0;
    padding-top: 64px;
  }

  .section {
    padding: 48px 20px;
  }

  .hero {
    padding: 56px 20px 48px;
  }

  .hero h1 {
    font-size: 38px;
    line-height: 1.2;
  }

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

  .hero-visual {
    margin-top: 16px;
  }

  .hero-visual img {
    min-height: 260px;
  }

  .ticker-section {
    padding: 18px 20px;
  }

  .ticker-inner {
    align-items: flex-start;
    flex-direction: column;
    gap: 6px;
  }

  .ticker-text {
    white-space: normal;
    font-size: 14px;
  }

  .stats-section {
    padding: 48px 20px 24px;
  }

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

  .timeline-section,
  .features-section,
  .pricing-section,
  .cta-section,
  .latest-section,
  .faq-section {
    padding: 48px 20px;
  }

  .steps-grid {
    grid-template-columns: 1fr;
    gap: 16px;
    padding-left: 0;
  }

  .step-card::before {
    display: none !important;
  }

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

  .feature-large,
  .feature-col,
  .feature-mid {
    grid-column: auto;
    grid-row: auto;
  }

  .feature-col {
    gap: 16px;
  }

  .feature-large .feature-media img {
    height: 200px;
  }

  .cta-copy,
  .cta-form-wrap {
    padding: 32px 24px;
  }

  .cta-copy h2 {
    font-size: 26px;
  }

  .post-item {
    flex-direction: column;
    align-items: flex-start;
    gap: 10px;
    padding: 20px 16px;
  }

  .post-date {
    writing-mode: horizontal-tb;
    padding: 6px 12px;
    min-height: auto;
    font-size: 12px;
  }

  .post-excerpt {
    white-space: normal;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
  }

  .post-meta {
    width: 100%;
    justify-content: space-between;
  }

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

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

  .faq-item summary {
    padding: 18px 20px;
    font-size: 16px;
  }

  .faq-body {
    padding: 0 20px 20px;
  }
}

@media (max-width: 520px) {
  .stats-grid {
    grid-template-columns: 1fr;
  }

  .stat-num {
    font-size: 30px;
  }

  .section-header h2 {
    font-size: 24px;
  }

  .btn {
    padding: 12px 18px;
    font-size: 14px;
  }
}

/* roulang page: article */
:root {
  --bg-deep:#0A111E;
  --bg-deeper:#070C14;
  --bg-elev:#0B0F17;
  --card-bg:rgba(255,255,255,0.05);
  --card-border:rgba(255,255,255,0.08);
  --blue:#38BDF8;
  --cyan:#22D3EE;
  --amber:#F59E0B;
  --green:#10B981;
  --red:#EF4444;
  --text:#E6EDF6;
  --text-2:#A0AFC2;
  --text-3:#6B7A8D;
  --r-lg:16px;
  --r-md:12px;
  --r-sm:10px;
  --sidebar-w:220px;
  --font-sans:"Inter","PingFang SC","Microsoft YaHei","Noto Sans SC",system-ui,sans-serif;
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{
  font-family:var(--font-sans);
  background:radial-gradient(ellipse at 20% 10%,#101F33 0%,transparent 60%),linear-gradient(180deg,#0A111E 0%,#070C14 100%);
  color:var(--text);
  line-height:1.7;
  -webkit-font-smoothing:antialiased;
  min-height:100vh;
}
a{color:inherit;text-decoration:none}
img{max-width:100%;display:block}
button{font-family:inherit;cursor:pointer}
:focus-visible{outline:2px solid var(--cyan);outline-offset:2px;border-radius:4px}

/* ===== 侧边栏 ===== */
.app-sidebar{
  position:fixed;top:0;left:0;width:var(--sidebar-w);height:100vh;
  background:rgba(10,17,30,0.92);backdrop-filter:blur(14px);
  border-right:1px solid rgba(255,255,255,0.06);
  display:flex;flex-direction:column;padding:28px 20px;z-index:100;
}
.brand-block{padding-bottom:28px;border-bottom:1px solid rgba(255,255,255,0.06)}
.brand-link{display:inline-flex;align-items:center;gap:10px;font-size:20px;font-weight:700;letter-spacing:.02em}
.brand-icon{
  width:34px;height:34px;border-radius:8px;
  background:rgba(56,189,248,0.12);border:1px solid rgba(56,189,248,0.25);
  display:flex;align-items:center;justify-content:center;color:var(--blue);
}
.brand-accent{
  background:linear-gradient(135deg,var(--cyan),var(--amber));
  -webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent;
}
.brand-sub{margin-top:6px;font-size:12px;color:var(--text-3);letter-spacing:.04em}
.side-nav{margin-top:24px;display:flex;flex-direction:column;gap:4px;flex:1}
.nav-link{
  display:flex;align-items:center;gap:12px;padding:11px 14px;border-radius:10px;
  font-size:15px;color:var(--text-2);transition:all .18s ease-out;position:relative;
}
.nav-link svg{flex-shrink:0}
.nav-link:hover{color:var(--text);background:rgba(255,255,255,0.04)}
.nav-link:hover::before{
  content:'';position:absolute;left:-20px;top:50%;transform:translateY(-50%);
  width:2px;height:22px;background:var(--cyan);border-radius:2px;
}
.nav-link.active{color:#fff;background:rgba(255,255,255,0.06)}
.nav-link.active::before{
  content:'';position:absolute;left:-20px;top:50%;transform:translateY(-50%);
  width:2px;height:22px;background:var(--amber);border-radius:2px;
}
.side-footer{padding-top:16px;border-top:1px solid rgba(255,255,255,0.06)}
.btn-login{
  display:flex;align-items:center;justify-content:center;gap:8px;
  padding:10px 16px;border-radius:10px;border:1px solid rgba(245,158,11,0.5);
  color:var(--amber);font-size:14px;font-weight:500;transition:all .18s ease-out;
}
.btn-login:hover{background:rgba(245,158,11,0.1);box-shadow:0 0 16px rgba(245,158,11,0.2);color:#fff}
.btn-login:active{transform:scale(.98)}

/* ===== 主内容壳 ===== */
.main-shell{margin-left:var(--sidebar-w);min-height:100vh;display:flex;flex-direction:column}
.page-main{flex:1;padding:40px 32px 80px;max-width:1280px;width:100%;margin:0 auto}

/* ===== 移动端头部 ===== */
.mobile-topbar{
  display:none;position:sticky;top:0;z-index:90;height:64px;
  align-items:center;justify-content:space-between;padding:0 20px;
  background:rgba(10,17,30,0.85);backdrop-filter:blur(12px);
  border-bottom:1px solid rgba(255,255,255,0.06);
}
.mobile-brand{font-size:18px;font-weight:700}
.mobile-brand span{color:var(--cyan)}
.mobile-hamburger{
  width:40px;height:40px;border:none;background:rgba(255,255,255,0.04);
  border-radius:10px;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:5px;
  border:1px solid rgba(255,255,255,0.08);
}
.mobile-hamburger span{display:block;width:18px;height:2px;background:var(--text);border-radius:2px;transition:all .25s}
.mobile-hamburger.active span:nth-child(1){transform:translateY(7px) rotate(45deg)}
.mobile-hamburger.active span:nth-child(2){opacity:0}
.mobile-hamburger.active span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}

/* ===== 移动抽屉 ===== */
.mobile-drawer{
  position:fixed;top:0;left:0;width:100%;height:100vh;z-index:200;
  background:rgba(7,12,20,0.98);
  display:flex;flex-direction:column;padding:100px 32px 40px;
  transform:translateX(-100%);transition:transform .3s ease-out;visibility:hidden;
}
.mobile-drawer.open{transform:translateX(0);visibility:visible}
.drawer-nav{display:flex;flex-direction:column;gap:8px}
.drawer-link{
  display:flex;align-items:center;gap:14px;padding:14px 16px;border-radius:12px;
  font-size:20px;font-weight:500;color:var(--text-2);transition:all .18s;
  background:rgba(255,255,255,0.02);border:1px solid transparent;
}
.drawer-link:hover,.drawer-link.active{color:#fff;background:rgba(255,255,255,0.05);border-color:rgba(56,189,248,0.2)}
.drawer-login{
  margin-top:32px;display:flex;align-items:center;justify-content:center;gap:8px;
  padding:14px;border-radius:12px;border:1px solid rgba(245,158,11,0.5);
  color:var(--amber);font-size:16px;font-weight:500;
}
.mobile-overlay{
  position:fixed;top:0;left:0;width:100%;height:100vh;z-index:150;
  background:rgba(0,0,0,0.55);opacity:0;pointer-events:none;transition:opacity .3s;
}
.mobile-overlay.show{opacity:1;pointer-events:auto}

/* ===== 面包屑 ===== */
.breadcrumb{
  display:flex;align-items:center;gap:8px;flex-wrap:wrap;
  font-size:13px;color:var(--text-3);margin-bottom:28px;
  padding:0 2px;
}
.breadcrumb a{color:var(--text-3);transition:color .18s}
.breadcrumb a:hover{color:var(--cyan)}
.breadcrumb .sep{color:rgba(255,255,255,0.2)}
.breadcrumb .current{color:var(--text-2);max-width:280px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}

/* ===== 文章卡片 ===== */
.article-card{
  background:var(--card-bg);border:1px solid var(--card-border);
  border-radius:var(--r-lg);backdrop-filter:blur(14px);
  box-shadow:0 8px 30px rgba(0,0,0,0.25);
  padding:48px 40px 56px;position:relative;overflow:hidden;
}
.article-card::before{
  content:'';position:absolute;top:0;left:0;right:0;height:1px;
  background:linear-gradient(90deg,transparent,rgba(56,189,248,0.4),rgba(245,158,11,0.4),transparent);
}
.article-header{max-width:760px;margin:0 auto 32px;text-align:center}
.article-header h1{
  font-size:34px;line-height:1.3;font-weight:700;letter-spacing:-0.01em;
  color:#fff;margin-bottom:20px;
}
.article-meta{
  display:flex;align-items:center;justify-content:center;gap:16px;flex-wrap:wrap;
  font-size:13px;color:var(--text-3);
}
.article-meta .meta-item{display:inline-flex;align-items:center;gap:6px}
.article-meta .cat-tag{
  display:inline-flex;align-items:center;padding:2px 12px;border-radius:999px;
  border:1px solid rgba(34,211,238,0.4);color:var(--cyan);font-size:12px;font-weight:500;
}

/* ===== 文章正文 ===== */
.article-body{max-width:760px;margin:0 auto;font-size:17px;line-height:1.8;color:var(--text)}
.article-body p{text-indent:2em;margin-bottom:1.4em}
.article-body h2{
  font-size:26px;font-weight:700;line-height:1.35;color:#fff;
  margin:36px 0 16px;padding-bottom:8px;
  border-bottom:1px solid rgba(255,255,255,0.06);
}
.article-body h3{font-size:22px;font-weight:600;line-height:1.4;color:var(--text);margin:30px 0 14px}
.article-body h4{font-size:18px;font-weight:600;color:var(--text);margin:24px 0 12px}
.article-body a{color:var(--cyan);border-bottom:1px solid rgba(34,211,238,0.3);transition:color .18s,border-color .18s}
.article-body a:hover{color:#fff;border-color:var(--cyan)}
.article-body img{border-radius:16px;margin:32px auto;box-shadow:0 8px 30px rgba(0,0,0,0.4)}
.article-body figure{margin:32px auto;text-align:center}
.article-body figcaption{font-size:14px;color:var(--text-3);margin-top:12px;text-align:center}
.article-body blockquote{
  border-left:4px solid var(--amber);background:rgba(245,158,11,0.06);
  padding:16px 20px;margin:28px 0;border-radius:0 12px 12px 0;
  color:var(--text-2);font-size:16px;
}
.article-body blockquote p{text-indent:0;margin:0}
.article-body ul,.article-body ol{margin:20px 0;padding-left:1.5em}
.article-body ul li{margin-bottom:8px;list-style:disc}
.article-body ol li{margin-bottom:8px;list-style:decimal}
.article-body li::marker{color:var(--blue)}
.article-body table{
  width:100%;border-collapse:collapse;background:var(--bg-elev);
  border-radius:12px;margin:28px 0;font-size:14px;overflow:hidden;
}
.article-body th{
  background:rgba(255,255,255,0.05);padding:12px 16px;text-align:left;
  color:#fff;font-weight:600;
}
.article-body td{padding:12px 16px;border-top:1px solid rgba(255,255,255,0.06);color:var(--text-2)}
.article-body code{
  background:var(--bg-elev);padding:2px 6px;border-radius:4px;
  font-family:ui-monospace,SFMono-Regular,Menlo,monospace;font-size:13px;color:var(--cyan);
}
.article-body pre{
  background:var(--bg-elev);border:1px solid rgba(255,255,255,0.06);
  border-radius:12px;padding:20px;margin:28px 0;overflow-x:auto;
  font-size:14px;line-height:1.6;
}
.article-body pre code{background:none;padding:0;color:var(--text-2)}

/* ===== 空态 ===== */
.article-empty{
  max-width:760px;margin:0 auto;padding:80px 20px;text-align:center;
  border:1px dashed rgba(255,255,255,0.15);border-radius:16px;
}
.article-empty p{font-size:18px;color:var(--text-2);margin-bottom:20px}
.article-empty a{
  display:inline-flex;align-items:center;gap:8px;padding:10px 28px;
  border-radius:10px;background:var(--amber);color:#0A111E;font-weight:600;font-size:14px;
  box-shadow:0 0 12px rgba(245,158,11,0.4);transition:all .18s;
}
.article-empty a:hover{filter:brightness(1.08)}

/* ===== 文章底部导航 ===== */
.article-bottom-nav{
  max-width:760px;margin:40px auto 0;display:flex;align-items:center;
  justify-content:space-between;gap:20px;flex-wrap:wrap;
  padding:20px 0;border-top:1px solid rgba(255,255,255,0.06);
  border-bottom:1px solid rgba(255,255,255,0.06);
}
.article-nav-left a{
  display:inline-flex;align-items:center;gap:8px;font-size:14px;color:var(--text-2);
  transition:color .18s;
}
.article-nav-left a:hover{color:var(--cyan)}
.article-nav-right{display:flex;align-items:center;gap:10px;font-size:13px;color:var(--text-3)}
.article-nav-right a{transition:color .18s}
.article-nav-right a:hover{color:var(--cyan)}

/* ===== 相关阅读 ===== */
.related-section{margin-top:56px}
.related-section > h2{
  font-size:22px;font-weight:600;margin-bottom:24px;color:#fff;
  display:flex;align-items:center;gap:10px;
}
.related-section > h2::before{
  content:'';width:3px;height:18px;border-radius:3px;
  background:linear-gradient(180deg,var(--cyan),var(--amber));
}
.related-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.related-card{
  background:var(--card-bg);border:1px solid var(--card-border);
  border-radius:var(--r-md);overflow:hidden;transition:all .18s ease-out;
  display:flex;flex-direction:column;
}
.related-card:hover{transform:translateY(-4px);box-shadow:0 16px 40px rgba(0,0,0,0.35),0 0 0 1px rgba(56,189,248,0.3)}
.related-card img{width:100%;height:120px;object-fit:cover}
.related-card .related-info{padding:16px 18px;flex:1;display:flex;flex-direction:column;gap:6px}
.related-card h3{font-size:15px;font-weight:600;color:var(--text);line-height:1.5;transition:color .18s}
.related-card:hover h3{color:var(--cyan)}
.related-card .related-date{font-size:12px;color:var(--text-3)}

/* ===== CTA ===== */
.article-cta{
  margin-top:56px;background:var(--card-bg);border:1px solid var(--card-border);
  border-radius:var(--r-lg);backdrop-filter:blur(14px);
  padding:48px 40px;text-align:center;position:relative;overflow:hidden;
}
.article-cta::before{
  content:'';position:absolute;top:0;left:50%;transform:translateX(-50%);
  width:280px;height:80px;background:radial-gradient(ellipse,rgba(245,158,11,0.12),transparent 70%);
}
.article-cta h2{font-size:26px;font-weight:700;color:#fff;margin-bottom:12px;position:relative}
.article-cta p{font-size:15px;color:var(--text-2);max-width:560px;margin:0 auto 28px;position:relative}
.btn-amber{
  display:inline-flex;align-items:center;gap:8px;padding:12px 36px;
  border-radius:12px;background:var(--amber);color:#0A111E;font-weight:600;font-size:15px;
  box-shadow:0 0 12px rgba(245,158,11,0.4),0 4px 14px rgba(245,158,11,0.2);
  transition:all .18s ease-out;position:relative;border:none;
}
.btn-amber:hover{filter:brightness(1.08);box-shadow:0 0 20px rgba(245,158,11,0.6),0 6px 20px rgba(245,158,11,0.3)}
.btn-amber:active{transform:scale(.98)}

/* ===== 页脚 ===== */
.site-footer{
  background:#060A11;border-top:1px solid rgba(255,255,255,0.05);
  padding:64px 40px 32px;
}
.footer-grid{
  max-width:1060px;margin:0 auto;display:grid;
  grid-template-columns:1.4fr 1fr 1.2fr;gap:48px;
}
.footer-brand{font-size:18px;font-weight:700;color:#fff;margin-bottom:12px}
.footer-about{font-size:14px;color:var(--text-3);line-height:1.7;max-width:280px}
.footer-title{font-size:14px;font-weight:600;color:#fff;margin-bottom:16px}
.footer-links{list-style:none;display:flex;flex-direction:column;gap:10px}
.footer-links a{font-size:14px;color:var(--text-3);transition:color .18s}
.footer-links a:hover{color:var(--cyan)}
.footer-contact{list-style:none;display:flex;flex-direction:column;gap:12px}
.footer-contact li{display:flex;align-items:center;gap:10px;font-size:14px;color:var(--text-3)}
.footer-contact svg{color:var(--blue);flex-shrink:0}
.footer-bottom{
  max-width:1060px;margin:48px auto 0;padding-top:24px;
  border-top:1px solid rgba(255,255,255,0.05);
  display:flex;align-items:center;justify-content:space-between;flex-wrap:wrap;gap:12px;
  font-size:13px;color:var(--text-3);
}
.footer-icp a{color:var(--text-3);transition:color .18s}
.footer-icp a:hover{color:var(--cyan)}

/* ===== 响应式 ===== */
@media (max-width:1024px){
  .app-sidebar{width:180px;padding:24px 16px}
  .main-shell{margin-left:180px}
  .nav-link{padding:10px 12px;font-size:14px}
  .nav-link svg{width:18px;height:18px}
  .related-grid{grid-template-columns:repeat(3,1fr)}
}

@media (max-width:768px){
  .app-sidebar{display:none}
  .main-shell{margin-left:0}
  .mobile-topbar{display:flex}
  .page-main{padding:24px 20px 60px}
  .article-card{padding:32px 24px 40px;border-radius:14px}
  .article-header h1{font-size:26px}
  .article-body{font-size:16px}
  .article-body h2{font-size:22px}
  .article-meta{gap:10px}
  .related-grid{grid-template-columns:1fr}
  .article-cta{padding:36px 24px}
  .article-bottom-nav{flex-direction:column;align-items:flex-start}
  .site-footer{padding:48px 20px 24px}
  .footer-grid{grid-template-columns:1fr;gap:32px}
  .footer-bottom{flex-direction:column;align-items:flex-start}
  .breadcrumb{font-size:12px;margin-bottom:20px}
}

@media (max-width:520px){
  .page-main{padding:20px 16px 48px}
  .article-card{padding:26px 18px 32px}
  .article-header h1{font-size:22px;line-height:1.35}
  .article-meta{font-size:12px;gap:8px;flex-wrap:wrap}
  .article-bottom-nav{gap:12px}
  .article-cta h2{font-size:22px}
  .article-cta{padding:28px 18px}
  .related-card img{height:100px}
  .btn-amber{width:100%;justify-content:center}
}

/* roulang page: category2 */
:root {
    --bg-deep: #0A111E;
    --bg-soft: #101F33;
    --bg-darker: #060A11;
    --accent-blue: #38BDF8;
    --accent-cyan: #22D3EE;
    --accent-amber: #F59E0B;
    --text-title: #E6EDF6;
    --text-body: #E6EDF6;
    --text-secondary: #A0AFC2;
    --text-muted: #6B7A8D;
    --glass-bg: rgba(255, 255, 255, 0.05);
    --glass-border: rgba(255, 255, 255, 0.08);
    --radius-card: 16px;
    --radius-small: 12px;
    --radius-input: 10px;
    --shadow-card: 0 8px 24px rgba(0, 0, 0, 0.2);
    --shadow-hover: 0 16px 40px rgba(0, 0, 0, 0.35), 0 0 0 1px rgba(56, 189, 248, 0.3);
    --shadow-btn: 0 0 12px rgba(245, 158, 11, 0.4), 0 4px 14px rgba(245, 158, 11, 0.2);
  }

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

  html {
    scroll-behavior: smooth;
  }

  body {
    font-family: "Inter", "PingFang SC", "Microsoft YaHei", "Noto Sans SC", system-ui, sans-serif;
    background: var(--bg-deep);
    background-image: radial-gradient(ellipse at 20% 10%, #101F33 0%, #0A111E 60%, #070C14 100%);
    color: var(--text-body);
    line-height: 1.8;
    font-size: 17px;
    min-height: 100vh;
  }

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

  a {
    color: var(--accent-blue);
    text-decoration: none;
    transition: color 0.18s ease-out;
  }

  a:hover {
    color: var(--accent-cyan);
  }

  button,
  input,
  select,
  textarea {
    font-family: inherit;
    font-size: 16px;
  }

  /* ===== 应用框架 ===== */
  .app-shell {
    display: flex;
    min-height: 100vh;
  }

  .app-main {
    flex: 1;
    margin-left: 240px;
    min-width: 0;
  }

  /* ===== 左侧导航 ===== */
  .app-sidebar {
    position: fixed;
    top: 0;
    left: 0;
    width: 240px;
    height: 100vh;
    background: rgba(7, 12, 20, 0.92);
    backdrop-filter: blur(16px);
    border-right: 1px solid var(--glass-border);
    display: flex;
    flex-direction: column;
    z-index: 1000;
    padding: 32px 20px 24px;
  }

  .brand-block {
    padding-bottom: 28px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.06);
  }

  .brand-link {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 20px;
    font-weight: 700;
    color: var(--text-title);
    letter-spacing: 0.5px;
  }

  .brand-link:hover {
    color: var(--text-title);
  }

  .brand-icon {
    width: 36px;
    height: 36px;
    border-radius: 10px;
    background: linear-gradient(135deg, rgba(56, 189, 248, 0.15), rgba(245, 158, 11, 0.12));
    border: 1px solid rgba(56, 189, 248, 0.25);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--accent-cyan);
  }

  .brand-accent {
    background: linear-gradient(100deg, var(--accent-cyan) 20%, var(--accent-amber) 90%);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    color: transparent;
  }

  .brand-sub {
    font-size: 12px;
    color: var(--text-muted);
    margin-top: 6px;
    padding-left: 46px;
    letter-spacing: 1px;
  }

  .side-nav {
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 6px;
    padding-top: 24px;
  }

  .nav-link {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px 14px;
    border-radius: var(--radius-small);
    color: var(--text-secondary);
    font-size: 15px;
    font-weight: 500;
    position: relative;
    transition: all 0.18s ease-out;
  }

  .nav-link svg {
    flex-shrink: 0;
  }

  .nav-link:hover {
    background: rgba(255, 255, 255, 0.04);
    color: var(--text-title);
  }

  .nav-link:hover::before {
    content: "";
    position: absolute;
    left: 0;
    top: 20%;
    height: 60%;
    width: 2px;
    background: var(--accent-cyan);
    border-radius: 2px;
  }

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

  .nav-link.active::before {
    content: "";
    position: absolute;
    left: 0;
    top: 20%;
    height: 60%;
    width: 2px;
    background: var(--accent-amber);
    border-radius: 2px;
  }

  .side-footer {
    border-top: 1px solid rgba(255, 255, 255, 0.06);
    padding-top: 20px;
  }

  .btn-login {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    width: 100%;
    padding: 11px 16px;
    border-radius: var(--radius-small);
    border: 1px solid rgba(245, 158, 11, 0.4);
    color: var(--accent-amber);
    font-size: 14px;
    font-weight: 600;
    transition: all 0.18s ease-out;
  }

  .btn-login:hover {
    background: rgba(245, 158, 11, 0.08);
    box-shadow: 0 0 10px rgba(245, 158, 11, 0.15);
    color: var(--accent-amber);
  }

  .btn-login:active {
    transform: scale(0.98);
  }

  /* ===== 移动端顶部导航 ===== */
  .mobile-header {
    display: none;
    position: sticky;
    top: 0;
    height: 64px;
    background: rgba(10, 17, 30, 0.85);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid rgba(255, 255, 255, 0.06);
    align-items: center;
    justify-content: space-between;
    padding: 0 20px;
    z-index: 1000;
  }

  .mobile-brand {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 18px;
    font-weight: 700;
    color: var(--text-title);
  }

  .mobile-burger {
    width: 42px;
    height: 42px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 5px;
    border-radius: 10px;
    background: transparent;
    border: 1px solid rgba(255, 255, 255, 0.1);
    cursor: pointer;
  }

  .mobile-burger span {
    width: 18px;
    height: 2px;
    background: var(--text-body);
    border-radius: 2px;
    transition: all 0.2s;
  }

  .mobile-menu {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(7, 12, 20, 0.98);
    z-index: 999;
    padding: 90px 32px 40px;
    flex-direction: column;
    gap: 8px;
  }

  .mobile-menu.open {
    display: flex;
  }

  .mobile-menu .nav-link {
    font-size: 20px;
    padding: 16px 12px;
  }

  .mobile-menu .btn-login {
    margin-top: 24px;
  }

  .mobile-menu .menu-close {
    position: absolute;
    top: 16px;
    right: 20px;
    width: 42px;
    height: 42px;
    display: flex;
    align-items: center;
    justify-content: center;
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 10px;
    background: transparent;
    color: var(--text-body);
    font-size: 22px;
    cursor: pointer;
  }

  /* ===== 容器与板块 ===== */
  .page-container {
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 32px;
  }

  .section-block {
    padding: 80px 32px;
  }

  .section-title {
    font-size: 32px;
    font-weight: 700;
    color: var(--text-title);
    line-height: 1.25;
    margin-bottom: 40px;
  }

  .section-subtitle {
    font-size: 16px;
    color: var(--text-secondary);
    margin-top: -28px;
    margin-bottom: 40px;
  }

  /* ===== Hero ===== */
  .page-hero {
    position: relative;
    padding: 100px 32px 80px;
    background-image: linear-gradient(135deg, rgba(10, 17, 30, 0.92), rgba(16, 31, 51, 0.85)), url('/assets/images/backpic/back-1.png');
    background-repeat: no-repeat;
    background-position: center;
    background-size: cover;
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
  }

  .page-hero::before {
    content: "";
    position: absolute;
    top: 0;
    right: 0;
    width: 500px;
    height: 400px;
    background: radial-gradient(circle, rgba(34, 211, 238, 0.08) 0%, transparent 70%);
    pointer-events: none;
  }

  .page-hero-inner {
    max-width: 1280px;
    margin: 0 auto;
    display: flex;
    align-items: center;
    gap: 48px;
    flex-wrap: wrap;
  }

  .page-hero-text {
    flex: 1.2;
    min-width: 320px;
  }

  .page-hero h1 {
    font-size: 52px;
    font-weight: 700;
    line-height: 1.15;
    color: var(--text-title);
    margin-bottom: 20px;
    letter-spacing: 1px;
  }

  .page-hero h1 .accent {
    background: linear-gradient(100deg, var(--accent-cyan), var(--accent-amber));
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
  }

  .page-hero p.lead {
    font-size: 18px;
    color: var(--text-secondary);
    max-width: 520px;
    line-height: 1.8;
    margin-bottom: 32px;
  }

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

  .btn-primary {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background: var(--accent-amber);
    color: #0A111E;
    font-size: 16px;
    font-weight: 600;
    padding: 14px 28px;
    border-radius: var(--radius-small);
    box-shadow: var(--shadow-btn);
    transition: all 0.18s ease-out;
    border: none;
    cursor: pointer;
  }

  .btn-primary:hover {
    background: #FBBF24;
    box-shadow: 0 0 18px rgba(245, 158, 11, 0.5), 0 6px 20px rgba(245, 158, 11, 0.25);
    color: #0A111E;
  }

  .btn-primary:active {
    transform: scale(0.98);
  }

  .btn-ghost {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background: var(--glass-bg);
    border: 1px solid rgba(255, 255, 255, 0.14);
    color: var(--text-body);
    font-size: 16px;
    font-weight: 500;
    padding: 14px 28px;
    border-radius: var(--radius-small);
    backdrop-filter: blur(10px);
    transition: all 0.18s ease-out;
    cursor: pointer;
  }

  .btn-ghost:hover {
    background: rgba(255, 255, 255, 0.1);
    border-color: rgba(34, 211, 238, 0.4);
    color: var(--accent-cyan);
  }

  .btn-ghost:active {
    transform: scale(0.98);
  }

  .page-hero-visual {
    flex: 0.8;
    min-width: 280px;
  }

  .hero-img-wrap {
    border-radius: 20px;
    overflow: hidden;
    border: 1px solid rgba(255, 255, 255, 0.1);
    box-shadow: 0 20px 50px rgba(0, 0, 0, 0.35);
  }

  .hero-badges {
    display: flex;
    gap: 12px;
    margin-top: 20px;
    flex-wrap: wrap;
  }

  .badge-hero {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    font-size: 13px;
    font-weight: 500;
    color: var(--accent-cyan);
    padding: 6px 14px;
    border-radius: 999px;
    background: rgba(34, 211, 238, 0.08);
    border: 1px solid rgba(34, 211, 238, 0.25);
  }

  /* ===== 玻璃卡片 ===== */
  .glass-card {
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-card);
    backdrop-filter: blur(14px);
    box-shadow: var(--shadow-card);
    padding: 28px;
    transition: transform 0.18s ease-out, box-shadow 0.18s ease-out;
    position: relative;
    overflow: hidden;
  }

  .glass-card::before {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: linear-gradient(180deg, rgba(255, 255, 255, 0.08), transparent);
  }

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

  .glass-card .card-icon {
    width: 48px;
    height: 48px;
    border-radius: 14px;
    background: rgba(56, 189, 248, 0.1);
    border: 1px solid rgba(56, 189, 248, 0.2);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--accent-cyan);
    margin-bottom: 16px;
  }

  .glass-card h3 {
    font-size: 20px;
    font-weight: 600;
    color: var(--text-title);
    line-height: 1.4;
    margin-bottom: 8px;
  }

  .glass-card p {
    font-size: 14px;
    line-height: 1.7;
    color: var(--text-secondary);
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
  }

  /* ===== 错位网格 ===== */
  .feature-grid {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: 24px;
  }

  .feature-grid .col-right {
    display: grid;
    grid-template-rows: 1fr 1fr;
    gap: 24px;
  }

  .feature-grid-bottom {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 24px;
    margin-top: 24px;
  }

  .feature-card-large .card-icon {
    width: 56px;
    height: 56px;
    border-radius: 16px;
  }

  .feature-card-large h3 {
    font-size: 22px;
  }

  .feature-card-large p {
    font-size: 15px;
    -webkit-line-clamp: 3;
  }

  /* ===== 流程时间线 ===== */
  .process-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
    counter-reset: step;
  }

  .process-item {
    position: relative;
    padding: 24px;
    border-radius: var(--radius-card);
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    backdrop-filter: blur(14px);
    transition: transform 0.18s ease-out, box-shadow 0.18s ease-out;
  }

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

  .process-item .step-num {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 16px;
    font-weight: 600;
    margin-bottom: 14px;
    font-variant-numeric: tabular-nums;
  }

  .step-done .step-num {
    background: rgba(16, 185, 129, 0.15);
    border: 1px solid rgba(16, 185, 129, 0.4);
    color: #10B981;
  }

  .step-active .step-num {
    background: rgba(245, 158, 11, 0.15);
    border: 1px solid var(--accent-amber);
    color: var(--accent-amber);
    box-shadow: 0 0 12px rgba(245, 158, 11, 0.4);
  }

  .step-idle .step-num {
    background: rgba(255, 255, 255, 0.04);
    border: 1px solid rgba(255, 255, 255, 0.1);
    color: var(--text-muted);
  }

  .process-item .step-name {
    font-size: 18px;
    font-weight: 600;
    color: var(--text-title);
    margin-bottom: 6px;
  }

  .process-item .step-desc {
    font-size: 14px;
    color: var(--text-secondary);
    line-height: 1.7;
  }

  .process-item .step-tag {
    display: inline-block;
    margin-top: 12px;
    font-size: 12px;
    padding: 3px 10px;
    border-radius: 999px;
    font-weight: 500;
  }

  .tag-done {
    color: var(--accent-cyan);
    background: rgba(34, 211, 238, 0.08);
    border: 1px solid rgba(34, 211, 238, 0.3);
  }

  .tag-active {
    color: var(--accent-amber);
    background: rgba(245, 158, 11, 0.08);
    border: 1px solid rgba(245, 158, 11, 0.35);
  }

  .tag-idle {
    color: var(--text-muted);
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid rgba(255, 255, 255, 0.08);
  }

  /* ===== 解决方案 ===== */
  .solution-row {
    display: flex;
    align-items: center;
    gap: 48px;
    margin-bottom: 56px;
    flex-wrap: wrap;
  }

  .solution-row.reverse {
    flex-direction: row-reverse;
  }

  .solution-visual {
    flex: 1;
    min-width: 300px;
  }

  .solution-visual img {
    border-radius: 20px;
    border: 1px solid var(--glass-border);
    box-shadow: var(--shadow-card);
  }

  .solution-content {
    flex: 1;
    min-width: 300px;
  }

  .solution-content h3 {
    font-size: 26px;
    font-weight: 600;
    color: var(--text-title);
    margin-bottom: 12px;
  }

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

  .solution-list {
    list-style: none;
    padding: 0;
  }

  .solution-list li {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 8px 0;
    font-size: 15px;
    color: var(--text-body);
  }

  .solution-list li svg {
    flex-shrink: 0;
    color: var(--accent-cyan);
  }

  /* ===== 数据指标 ===== */
  .stats-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
    margin-top: 40px;
  }

  .stat-item {
    text-align: center;
    padding: 32px 20px;
    border-radius: var(--radius-card);
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    backdrop-filter: blur(14px);
  }

  .stat-num {
    font-size: 42px;
    font-weight: 700;
    color: var(--text-title);
    font-variant-numeric: tabular-nums;
    line-height: 1.2;
  }

  .stat-num .suffix {
    font-size: 20px;
    color: var(--accent-cyan);
    margin-left: 2px;
  }

  .stat-label {
    font-size: 14px;
    color: var(--text-secondary);
    margin-top: 8px;
  }

  /* ===== FAQ ===== */
  .faq-list {
    max-width: 860px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    gap: 16px;
  }

  .faq-item {
    border-radius: var(--radius-card);
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    backdrop-filter: blur(14px);
    overflow: hidden;
    transition: border-color 0.18s ease-out;
  }

  .faq-item.open {
    border-color: rgba(34, 211, 238, 0.3);
  }

  .faq-question {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 22px 24px;
    cursor: pointer;
    font-size: 17px;
    font-weight: 600;
    color: var(--text-title);
    background: transparent;
    border: none;
    width: 100%;
    text-align: left;
    transition: background 0.15s ease-out;
  }

  .faq-question:hover {
    background: rgba(255, 255, 255, 0.02);
  }

  .faq-question .faq-arrow {
    width: 20px;
    height: 20px;
    transition: transform 0.2s ease-out;
    color: var(--text-secondary);
    flex-shrink: 0;
  }

  .faq-item.open .faq-arrow {
    transform: rotate(180deg);
    color: var(--accent-cyan);
  }

  .faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.25s ease-out;
    padding: 0 24px;
    color: var(--text-secondary);
    font-size: 15px;
    line-height: 1.75;
  }

  .faq-item.open .faq-answer {
    max-height: 300px;
    padding-bottom: 20px;
  }

  /* ===== CTA ===== */
  .cta-section {
    position: relative;
    padding: 80px 32px;
    background-image: linear-gradient(135deg, rgba(10, 17, 30, 0.95), rgba(16, 31, 51, 0.88)), url('/assets/images/backpic/back-2.webp');
    background-repeat: no-repeat;
    background-position: center;
    background-size: cover;
    border-top: 1px solid rgba(255, 255, 255, 0.05);
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
  }

  .cta-inner {
    max-width: 720px;
    margin: 0 auto;
    text-align: center;
  }

  .cta-inner h2 {
    font-size: 36px;
    font-weight: 700;
    color: var(--text-title);
    margin-bottom: 16px;
  }

  .cta-inner p {
    font-size: 17px;
    color: var(--text-secondary);
    margin-bottom: 32px;
  }

  .cta-form {
    background: rgba(10, 17, 30, 0.7);
    border: 1px solid var(--glass-border);
    border-radius: 20px;
    backdrop-filter: blur(14px);
    padding: 32px;
    text-align: left;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
  }

  .form-group {
    display: flex;
    flex-direction: column;
    gap: 6px;
  }

  .form-group.full {
    grid-column: 1 / -1;
  }

  .form-group label {
    font-size: 13px;
    color: var(--text-secondary);
    font-weight: 500;
  }

  .form-group input,
  .form-group textarea {
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 10px;
    padding: 12px 14px;
    color: var(--text-body);
    font-size: 15px;
    outline: none;
    transition: border-color 0.18s ease-out, box-shadow 0.18s ease-out;
  }

  .form-group input:focus,
  .form-group textarea:focus {
    border-color: var(--accent-cyan);
    box-shadow: 0 0 0 3px rgba(34, 211, 238, 0.1);
  }

  .form-group textarea {
    min-height: 80px;
    resize: vertical;
  }

  .cta-form .btn-primary {
    grid-column: 1 / -1;
    justify-content: center;
    width: 100%;
  }

  /* ===== 页脚 ===== */
  .site-footer {
    background: #060A11;
    border-top: 1px solid rgba(255, 255, 255, 0.05);
    padding: 60px 32px 24px;
  }

  .footer-grid {
    max-width: 1280px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: 2fr 1fr 1.5fr;
    gap: 48px;
  }

  .footer-brand {
    font-size: 20px;
    font-weight: 700;
    color: var(--text-title);
    margin-bottom: 10px;
  }

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

  .footer-title {
    font-size: 15px;
    font-weight: 600;
    color: var(--text-title);
    margin-bottom: 16px;
  }

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

  .footer-links a {
    font-size: 14px;
    color: var(--text-secondary);
    transition: color 0.15s;
  }

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

  .footer-contact li {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 14px;
    color: var(--text-secondary);
  }

  .footer-contact svg {
    color: var(--accent-cyan);
    flex-shrink: 0;
  }

  .footer-bottom {
    max-width: 1280px;
    margin: 40px auto 0;
    padding-top: 24px;
    border-top: 1px solid rgba(255, 255, 255, 0.05);
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 12px;
  }

  .footer-bottom p {
    font-size: 13px;
    color: var(--text-muted);
  }

  .footer-icp a {
    color: var(--text-muted);
  }

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

  /* ===== focus 可访问性 ===== */
  :focus-visible {
    outline: 2px solid var(--accent-cyan);
    outline-offset: 2px;
  }

  /* ===== 响应式 ===== */
  @media (max-width: 1200px) {
    .feature-grid {
      grid-template-columns: 1.5fr 1fr;
    }
  }

  @media (max-width: 1024px) {
    .app-sidebar {
      width: 180px;
      padding: 24px 16px;
    }

    .app-main {
      margin-left: 180px;
    }

    .brand-sub {
      padding-left: 0;
      font-size: 11px;
    }

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

    .page-hero h1 {
      font-size: 42px;
    }

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

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

  @media (max-width: 768px) {
    .app-sidebar {
      display: none;
    }

    .app-main {
      margin-left: 0;
    }

    .mobile-header {
      display: flex;
    }

    .section-block {
      padding: 48px 20px;
    }

    .page-hero {
      padding: 64px 20px 48px;
    }

    .page-hero-inner {
      flex-direction: column;
      gap: 32px;
    }

    .page-hero h1 {
      font-size: 36px;
    }

    .page-hero p.lead {
      font-size: 16px;
    }

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

    .feature-grid .col-right {
      grid-template-rows: auto auto;
    }

    .feature-grid-bottom {
      grid-template-columns: 1fr;
    }

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

    .solution-row {
      flex-direction: column;
      gap: 24px;
      margin-bottom: 40px;
    }

    .solution-row.reverse {
      flex-direction: column;
    }

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

    .stat-num {
      font-size: 32px;
    }

    .cta-form {
      grid-template-columns: 1fr;
      padding: 24px;
    }

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

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

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

  @media (max-width: 520px) {
    .page-container {
      padding: 0 20px;
    }

    .page-hero {
      padding: 48px 20px 40px;
    }

    .page-hero h1 {
      font-size: 30px;
    }

    .hero-actions {
      flex-direction: column;
      width: 100%;
    }

    .btn-primary,
    .btn-ghost {
      justify-content: center;
      width: 100%;
    }

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

    .process-grid {
      gap: 16px;
    }

    .section-block {
      padding: 40px 16px;
    }

    .cta-section {
      padding: 48px 16px;
    }
  }

/* roulang page: category1 */
:root {
    --bg-deep: #0A111E;
    --bg-side: rgba(10,17,30,0.92);
    --bg-main: #0A111E;
    --accent-blue: #38BDF8;
    --accent-cyan: #22D3EE;
    --accent-amber: #F59E0B;
    --text-primary: #E6EDF6;
    --text-secondary: #A0AFC2;
    --text-muted: #6B7A8D;
    --border-glass: rgba(255,255,255,0.08);
    --card-bg: rgba(255,255,255,0.05);
    --radius-lg: 16px;
    --radius-md: 12px;
    --radius-sm: 10px;
    --shadow-card: 0 8px 24px rgba(0,0,0,0.2);
    --shadow-hover: 0 16px 40px rgba(0,0,0,0.35);
    --font-stack: "Inter","PingFang SC","Microsoft YaHei","Noto Sans SC",system-ui,sans-serif;
  }

  * { box-sizing: border-box; margin: 0; padding: 0; }
  html { scroll-behavior: smooth; }
  body {
    background: var(--bg-deep);
    background-image: radial-gradient(ellipse at 20% 10%, #101F33 0%, #0A111E 60%, #070C14 100%);
    background-attachment: fixed;
    color: var(--text-primary);
    font-family: var(--font-stack);
    font-size: 17px;
    line-height: 1.8;
    min-height: 100vh;
    -webkit-font-smoothing: antialiased;
  }
  a { color: inherit; text-decoration: none; }
  img { max-width: 100%; display: block; }
  button { font-family: inherit; cursor: pointer; }
  input, textarea { font-family: inherit; }

  ::selection { background: rgba(56,189,248,0.25); }

  /* ===== Layout ===== */
  .app-sidebar {
    position: fixed;
    left: 0; top: 0;
    width: 220px;
    height: 100vh;
    display: flex;
    flex-direction: column;
    background: rgba(10,17,30,0.92);
    backdrop-filter: blur(12px);
    border-right: 1px solid rgba(255,255,255,0.06);
    z-index: 40;
  }
  .app-main {
    margin-left: 220px;
    padding: 32px;
    min-height: 100vh;
  }
  .container-inner { max-width: 1280px; margin: 0 auto; }

  /* ===== Sidebar brand ===== */
  .brand-block { padding: 28px 20px 16px; border-bottom: 1px solid rgba(255,255,255,0.05); }
  .brand-link { display: flex; align-items: center; gap: 10px; font-size: 20px; font-weight: 700; color: #fff; }
  .brand-icon {
    width: 34px; height: 34px;
    display: flex; align-items: center; justify-content: center;
    background: rgba(56,189,248,0.1);
    border: 1px solid rgba(56,189,248,0.3);
    border-radius: 8px;
    color: var(--accent-blue);
  }
  .brand-accent {
    background: linear-gradient(90deg, var(--accent-cyan), var(--accent-amber));
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
    font-weight: 700;
  }
  .brand-sub { margin-top: 8px; font-size: 12px; color: var(--text-muted); letter-spacing: 0.4px; }

  /* ===== Sidebar nav ===== */
  .side-nav { flex: 1; padding: 20px 0; display: flex; flex-direction: column; gap: 2px; }
  .nav-link {
    position: relative;
    display: flex; align-items: center;
    gap: 12px;
    padding: 13px 24px;
    font-size: 14px;
    font-weight: 500;
    color: var(--text-secondary);
    border-left: 2px solid transparent;
    transition: background 0.18s ease-out, color 0.18s ease-out, border-color 0.18s ease-out;
  }
  .nav-link svg { color: var(--text-muted); transition: color 0.18s ease-out; flex-shrink: 0; }
  .nav-link:hover {
    background: rgba(255,255,255,0.04);
    color: var(--text-primary);
    border-left-color: var(--accent-cyan);
  }
  .nav-link:hover svg { color: var(--accent-cyan); }
  .nav-link.active {
    color: #fff;
    border-left-color: var(--accent-amber);
    background: rgba(255,255,255,0.04);
  }
  .nav-link.active svg { color: var(--accent-amber); }

  /* ===== Sidebar footer ===== */
  .side-footer { padding: 16px 20px 28px; border-top: 1px solid rgba(255,255,255,0.05); }
  .btn-login {
    display: flex; align-items: center; justify-content: center;
    gap: 8px;
    width: 100%;
    padding: 11px 0;
    font-size: 14px;
    font-weight: 500;
    color: var(--text-primary);
    background: rgba(255,255,255,0.03);
    border: 1px solid rgba(255,255,255,0.12);
    border-radius: var(--radius-md);
    transition: all 0.18s ease-out;
  }
  .btn-login:hover { border-color: rgba(245,158,11,0.5); color: var(--accent-amber); box-shadow: 0 0 12px rgba(245,158,11,0.15); }
  .btn-login:active { transform: scale(0.98); }

  /* ===== Mobile topbar ===== */
  .mobile-topbar {
    display: none;
    position: fixed;
    top: 0; left: 0;
    width: 100%;
    height: 64px;
    align-items: center;
    justify-content: space-between;
    padding: 0 20px;
    background: rgba(10,17,30,0.85);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid rgba(255,255,255,0.06);
    z-index: 52;
  }
  .mobile-brand { display: flex; align-items: center; gap: 8px; color: #fff; font-size: 18px; font-weight: 700; }
  .mobile-brand .brand-accent { background: linear-gradient(90deg, var(--accent-cyan), var(--accent-amber)); -webkit-background-clip: text; background-clip: text; color: transparent; }
  .mobile-menu-btn {
    width: 42px; height: 42px;
    display: flex; align-items: center; justify-content: center;
    background: rgba(255,255,255,0.04);
    border: 1px solid rgba(255,255,255,0.1);
    border-radius: 10px;
    color: var(--text-primary);
  }
  .mobile-menu-btn:hover { border-color: rgba(56,189,248,0.4); }
  .mobile-menu-btn:active { transform: scale(0.96); }

  .mobile-drawer {
    display: flex;
    flex-direction: column;
    position: fixed;
    top: 64px; left: 0; right: 0; bottom: 0;
    background: rgba(7,12,20,0.98);
    backdrop-filter: blur(14px);
    padding: 24px 20px 32px;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-8px);
    transition: opacity 0.2s ease-out, transform 0.2s ease-out, visibility 0.2s ease-out;
    z-index: 51;
  }
  .mobile-drawer.open { opacity: 1; visibility: visible; transform: translateY(0); }
  .mobile-drawer .nav-link { font-size: 18px; padding: 15px 8px; border-left: none; border-bottom: 1px solid rgba(255,255,255,0.06); gap: 14px; }
  .mobile-drawer .nav-link:hover { background: transparent; border-left: none; color: #fff; }
  .mobile-drawer .nav-link.active { border-left: none; background: rgba(255,255,255,0.03); color: var(--accent-amber); border-bottom-color: rgba(245,158,11,0.2); }
  .mobile-drawer .drawer-cta { margin-top: auto; display: flex; flex-direction: column; gap: 12px; }
  .mobile-drawer .drawer-cta a:first-child { background: var(--accent-amber); color: #0A111E; font-weight: 600; text-align: center; padding: 13px; border-radius: 12px; }
  .mobile-drawer .drawer-cta a:last-child { text-align: center; color: var(--text-secondary); padding: 12px; border: 1px solid rgba(255,255,255,0.12); border-radius: 12px; }

  /* ===== Glass card / helpers ===== */
  .glass-card {
    background: rgba(255,255,255,0.05);
    border: 1px solid rgba(255,255,255,0.08);
    backdrop-filter: blur(14px);
    box-shadow: var(--shadow-card);
    border-radius: var(--radius-lg);
    position: relative;
    overflow: hidden;
  }
  .glass-card::before {
    content: '';
    position: absolute;
    top: 0; left: 0; right: 0;
    height: 60px;
    background: linear-gradient(180deg, rgba(255,255,255,0.06), transparent);
    pointer-events: none;
  }
  .glass-card-hover { transition: transform 0.2s ease-out, box-shadow 0.2s ease-out, border-color 0.2s ease-out; }
  .glass-card-hover:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-hover), 0 0 0 1px rgba(56,189,248,0.3);
    border-color: rgba(56,189,248,0.3);
  }

  .badge-tag {
    display: inline-flex; align-items: center;
    padding: 3px 12px;
    font-size: 12px;
    font-weight: 500;
    border-radius: 999px;
    color: var(--accent-cyan);
    background: rgba(34,211,238,0.08);
    border: 1px solid rgba(34,211,238,0.2);
  }
  .badge-amber {
    display: inline-flex; align-items: center;
    padding: 3px 12px;
    font-size: 12px;
    font-weight: 500;
    border-radius: 999px;
    color: var(--accent-amber);
    background: rgba(245,158,11,0.1);
    border: 1px solid rgba(245,158,11,0.25);
  }
  .badge-gray {
    display: inline-flex; align-items: center;
    padding: 3px 12px;
    font-size: 12px;
    font-weight: 500;
    border-radius: 999px;
    color: var(--text-muted);
    background: rgba(255,255,255,0.04);
    border: 1px solid rgba(255,255,255,0.08);
  }

  .section-title { font-size: 28px; font-weight: 700; line-height: 1.25; letter-spacing: -0.3px; margin-bottom: 12px; }
  .section-sub { font-size: 15px; color: var(--text-muted); }
  .section-header { margin-bottom: 36px; }

  .btn {
    display: inline-flex; align-items: center; justify-content: center;
    gap: 8px;
    padding: 13px 28px;
    font-size: 15px;
    font-weight: 600;
    border-radius: var(--radius-md);
    transition: all 0.18s ease-out;
    border: 1px solid transparent;
    white-space: nowrap;
  }
  .btn-amber {
    background: var(--accent-amber);
    color: #0A111E;
    box-shadow: 0 0 12px rgba(245,158,11,0.4), 0 4px 14px rgba(245,158,11,0.2);
  }
  .btn-amber:hover { filter: brightness(1.08); box-shadow: 0 0 18px rgba(245,158,11,0.55), 0 6px 20px rgba(245,158,11,0.3); }
  .btn-amber:active { transform: scale(0.98); }
  .btn-ghost {
    background: rgba(255,255,255,0.04);
    border-color: rgba(255,255,255,0.14);
    color: var(--text-primary);
    backdrop-filter: blur(6px);
  }
  .btn-ghost:hover { border-color: rgba(56,189,248,0.4); color: var(--accent-blue); background: rgba(56,189,248,0.05); box-shadow: 0 0 10px rgba(56,189,248,0.15); }
  .btn-ghost:active { transform: scale(0.98); }

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

  /* ===== Hero ===== */
  .hero-section {
    position: relative;
    overflow: hidden;
    border-radius: 24px;
    padding: 72px 64px;
    background-image: url('/assets/images/backpic/back-1.png');
    background-size: cover;
    background-position: center;
    min-height: 420px;
    display: flex;
    align-items: center;
  }
  .hero-section::before {
    content: '';
    position: absolute; inset: 0;
    background: linear-gradient(90deg, rgba(8,13,22,0.92) 0%, rgba(8,13,22,0.72) 45%, rgba(8,13,22,0.3) 100%);
    z-index: 1;
  }
  .hero-section::after {
    content: '';
    position: absolute; inset: 0;
    background-image:
      linear-gradient(rgba(56,189,248,0.05) 1px, transparent 1px),
      linear-gradient(90deg, rgba(56,189,248,0.05) 1px, transparent 1px);
    background-size: 28px 28px;
    pointer-events: none;
    z-index: 0;
  }
  .hero-content { position: relative; z-index: 2; max-width: 640px; }
  .hero-eyebrow {
    display: inline-flex; align-items: center; gap: 8px;
    font-size: 13px;
    color: var(--accent-cyan);
    background: rgba(34,211,238,0.08);
    border: 1px solid rgba(34,211,238,0.2);
    border-radius: 999px;
    padding: 6px 16px;
    margin-bottom: 24px;
    letter-spacing: 0.5px;
  }
  .hero-h1 { font-size: 48px; line-height: 1.15; font-weight: 700; color: #fff; margin-bottom: 20px; }
  .hero-h1 .hero-brand { display: block; }
  .hero-h1 .hero-cat {
    display: inline-block;
    margin-top: 10px;
    font-size: 30px;
    color: rgba(230,237,246,0.85);
    font-weight: 600;
    border-left: 3px solid var(--accent-amber);
    padding-left: 16px;
    line-height: 1.3;
  }
  .hero-desc { font-size: 16px; color: var(--text-secondary); max-width: 460px; margin-bottom: 32px; }
  .hero-actions { display: flex; gap: 16px; flex-wrap: wrap; }

  .hero-dot {
    position: absolute;
    border-radius: 50%;
    z-index: 1;
    animation: floatDot 5s ease-in-out infinite alternate;
    pointer-events: none;
  }
  .hero-dot-1 { width: 8px; height: 8px; background: rgba(56,189,248,0.7); top: 30%; right: 22%; }
  .hero-dot-2 { width: 5px; height: 5px; background: rgba(34,211,238,0.6); bottom: 26%; right: 36%; animation-duration: 4s; }
  .hero-dot-3 { width: 6px; height: 6px; background: rgba(245,158,11,0.5); top: 44%; right: 14%; animation-duration: 7s; }
  @keyframes floatDot {
    from { transform: translateY(0); opacity: 0.5; }
    to { transform: translateY(-10px); opacity: 1; }
  }

  /* ===== Stats ===== */
  .stats-container { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; }
  .stat-card { padding: 22px 24px; }
  .stat-num { font-size: 34px; font-weight: 700; color: #fff; font-variant-numeric: tabular-nums; line-height: 1.2; letter-spacing: -0.5px; }
  .stat-num span { color: var(--accent-amber); }
  .stat-label { margin-top: 6px; font-size: 13px; color: var(--text-muted); }

  /* ===== Timeline ===== */
  .timeline-wrap { position: relative; margin-top: 8px; }
  .timeline-wrap::before {
    content: '';
    position: absolute;
    left: 20px; top: 8px; bottom: 8px;
    width: 1px;
    background: dashed;
    border-left: 1px dashed rgba(255,255,255,0.14);
  }
  .timeline-item { position: relative; padding-left: 56px; padding-bottom: 36px; }
  .timeline-item:last-child { padding-bottom: 0; }
  .timeline-dot {
    position: absolute;
    left: 11px; top: 4px;
    width: 19px; height: 19px;
    border-radius: 50%;
    background: rgba(34,211,238,0.15);
    border: 2px solid var(--accent-cyan);
    box-shadow: 0 0 8px rgba(34,211,238,0.35);
    z-index: 1;
  }
  .timeline-dot.current {
    background: var(--accent-amber);
    border-color: var(--accent-amber);
    box-shadow: 0 0 14px rgba(245,158,11,0.5);
  }
  .timeline-dot.done {
    background: rgba(16,185,129,0.2);
    border-color: #10B981;
    box-shadow: 0 0 8px rgba(16,185,129,0.3);
  }
  .timeline-date { font-size: 13px; color: var(--text-muted); font-variant-numeric: tabular-nums; margin-bottom: 8px; letter-spacing: 0.3px; }
  .timeline-card { padding: 18px 22px; }
  .timeline-card h3 { font-size: 18px; font-weight: 600; color: var(--text-primary); margin-bottom: 6px; }
  .timeline-card p { font-size: 14px; color: var(--text-secondary); line-height: 1.7; }
  .timeline-meta { display: flex; align-items: center; gap: 10px; margin-bottom: 8px; }

  /* ===== Highlight grid ===== */
  .highlights-grid { display: grid; grid-template-columns: 1.35fr 1fr; grid-template-rows: 1fr 1fr; gap: 24px; }
  .highlight-card { padding: 26px; min-height: 180px; display: flex; flex-direction: column; }
  .highlight-card.featured { grid-row: span 2; }
  .highlight-icon { width: 44px; height: 44px; display: flex; align-items: center; justify-content: center; border-radius: 12px; background: rgba(56,189,248,0.1); border: 1px solid rgba(56,189,248,0.2); color: var(--accent-blue); margin-bottom: auto; }
  .highlight-title { font-size: 20px; font-weight: 600; margin-top: 16px; }
  .highlight-desc { font-size: 14px; color: var(--text-secondary); margin-top: 8px; line-height: 1.7; overflow: hidden; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; }
  .highlight-link { margin-top: 12px; font-size: 14px; font-weight: 500; color: var(--accent-cyan); display: inline-flex; align-items: center; gap: 6px; transition: gap 0.18s ease-out; }
  .highlight-link:hover { gap: 10px; color: #fff; }

  .highlight-card.cover-card { padding: 0; position: relative; }
  .cover-card-img { width: 100%; height: 100%; object-fit: cover; position: absolute; inset: 0; border-radius: var(--radius-lg); }
  .cover-card-overlay { position: absolute; inset: 0; background: linear-gradient(200deg, rgba(7,12,20,0.25) 20%, rgba(7,12,20,0.9) 100%); border-radius: var(--radius-lg); padding: 26px; display: flex; flex-direction: column; justify-content: flex-end; }
  .cover-card-overlay h3 { font-size: 20px; font-weight: 600; color: #fff; }
  .cover-card-overlay p { font-size: 14px; color: rgba(160,175,194,0.9); margin-top: 6px; line-height: 1.6; }
  .cover-card-overlay .badge-tag { align-self: flex-start; margin-bottom: auto; }

  /* ===== Scenario cards ===== */
  .scenarios-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }
  .scenario-card { padding: 26px 22px; }
  .scenario-icon { width: 40px; height: 40px; display: flex; align-items: center; justify-content: center; border-radius: 10px; background: rgba(245,158,11,0.08); border: 1px solid rgba(245,158,11,0.18); color: var(--accent-amber); margin-bottom: 18px; }
  .scenario-card h3 { font-size: 17px; font-weight: 600; margin-bottom: 10px; }
  .scenario-card p { font-size: 14px; color: var(--text-secondary); line-height: 1.7; }

  /* ===== FAQ + Guide ===== */
  .faq-grid { display: grid; grid-template-columns: 1fr 360px; gap: 40px; align-items: start; }
  .faq-item { border-radius: var(--radius-md); margin-bottom: 16px; }
  .faq-item .faq-question {
    width: 100%;
    display: flex; align-items: center; justify-content: space-between;
    gap: 16px;
    padding: 18px 22px;
    background: transparent;
    border: none;
    color: var(--text-primary);
    font-size: 16px;
    font-weight: 600;
    text-align: left;
  }
  .faq-item .faq-question .faq-arrow {
    width: 20px; height: 20px;
    display: inline-flex; align-items: center; justify-content: center;
    transition: transform 0.2s ease-out;
    color: var(--text-muted);
  }
  .faq-item.open .faq-question .faq-arrow { transform: rotate(180deg); color: var(--accent-cyan); }
  .faq-item .faq-answer {
    max-height: 0;
    overflow: hidden;
    padding: 0 22px;
    font-size: 15px;
    line-height: 1.8;
    color: var(--text-secondary);
    transition: max-height 0.3s ease-out, padding 0.3s ease-out;
  }
  .faq-item.open .faq-answer { max-height: 400px; padding: 0 22px 20px; }

  .guide-panel { padding: 28px 24px; position: sticky; top: 32px; }
  .guide-panel-title { display: flex; align-items: center; gap: 10px; font-size: 17px; font-weight: 600; margin-bottom: 18px; }
  .guide-panel-title svg { color: var(--accent-amber); }
  .guide-panel ul { list-style: none; }
  .guide-panel ul li { padding: 11px 0; border-bottom: 1px solid rgba(255,255,255,0.05); }
  .guide-panel ul li:last-child { border-bottom: none; }
  .guide-panel ul li a { font-size: 15px; color: var(--text-secondary); transition: color 0.18s, padding-left 0.18s ease-out; }
  .guide-panel ul li a:hover { color: var(--accent-cyan); padding-left: 4px; }
  .guide-panel p { margin-top: 16px; font-size: 13px; color: var(--text-muted); line-height: 1.7; border-top: 1px solid rgba(255,255,255,0.05); padding-top: 16px; }

  /* ===== CTA ===== */
  .cta-section { }
  .cta-card { padding: 48px; display: grid; grid-template-columns: 1fr 1.2fr; gap: 48px; align-items: center; border-radius: 20px; }
  .cta-title { font-size: 28px; font-weight: 700; margin-bottom: 12px; }
  .cta-desc { font-size: 15px; color: var(--text-secondary); margin-bottom: 24px; }
  .cta-points { list-style: none; display: flex; flex-direction: column; gap: 12px; margin-top: 20px; }
  .cta-points li { display: flex; align-items: center; gap: 10px; font-size: 14px; color: var(--text-secondary); }
  .cta-points li svg { color: #10B981; flex-shrink: 0; }
  .cta-form { display: grid; gap: 16px; }
  .cta-form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
  .form-field { display: flex; flex-direction: column; gap: 6px; }
  .form-field label { font-size: 13px; color: var(--text-muted); }
  .form-field input, .form-field textarea {
    background: rgba(10,17,30,0.5);
    border: 1px solid rgba(255,255,255,0.1);
    border-radius: 10px;
    padding: 12px 14px;
    font-size: 15px;
    color: var(--text-primary);
    transition: border-color 0.18s ease-out, box-shadow 0.18s ease-out;
  }
  .form-field input::placeholder, .form-field textarea::placeholder { color: var(--text-muted); }
  .form-field input:focus, .form-field textarea:focus { outline: none; border-color: var(--accent-cyan); box-shadow: 0 0 0 3px rgba(34,211,238,0.1); }
  .cta-submit { width: 100%; margin-top: 8px; justify-content: center; }
  .cta-submit.submitted { background: #10B981; box-shadow: 0 0 12px rgba(16,185,129,0.4); }

  /* ===== Footer ===== */
  .site-footer {
    background: #060A11;
    border-top: 1px solid rgba(255,255,255,0.05);
    margin-top: 80px;
    padding: 48px 32px 20px;
  }
  .footer-grid { max-width: 1280px; margin: 0 auto; display: grid; grid-template-columns: 1.4fr 1fr 1.2fr; gap: 48px; }
  .footer-brand { font-size: 20px; font-weight: 700; color: #fff; }
  .footer-about { margin-top: 12px; font-size: 14px; color: var(--text-muted); line-height: 1.8; max-width: 320px; }
  .footer-title { font-size: 15px; font-weight: 600; color: var(--text-primary); margin-bottom: 16px; }
  .footer-links { list-style: none; display: flex; flex-direction: column; gap: 10px; }
  .footer-links li a { font-size: 14px; color: var(--text-secondary); transition: color 0.18s ease-out; }
  .footer-links li a:hover { color: var(--accent-cyan); }
  .footer-contact { list-style: none; display: flex; flex-direction: column; gap: 12px; }
  .footer-contact li { display: flex; align-items: center; gap: 10px; font-size: 14px; color: var(--text-secondary); }
  .footer-contact svg { color: var(--text-muted); flex-shrink: 0; }
  .footer-bottom {
    max-width: 1280px; margin: 40px auto 0;
    padding-top: 20px;
    border-top: 1px solid rgba(255,255,255,0.05);
    display: flex; align-items: center; justify-content: space-between;
    font-size: 13px; color: var(--text-muted);
  }
  .footer-icp a { color: var(--text-muted); transition: color 0.18s; }
  .footer-icp a:hover { color: var(--accent-cyan); }

  /* ===== Breadcrumb ===== */
  .breadcrumb { display: flex; align-items: center; gap: 10px; font-size: 13px; color: var(--text-muted); margin-bottom: 28px; flex-wrap: wrap; }
  .breadcrumb a { transition: color 0.18s ease-out; }
  .breadcrumb a:hover { color: var(--accent-cyan); }
  .breadcrumb .sep { color: var(--text-muted); opacity: 0.5; }
  .breadcrumb .current { color: var(--text-secondary); }

  /* ===== Spacing utilities ===== */
  .section-space { margin-top: 80px; }

  /* ===== Responsive ===== */
  @media (max-width: 1024px) {
    .app-sidebar { width: 180px; }
    .app-main { margin-left: 180px; padding: 24px; }
    .nav-link { padding: 12px 16px; }
    .brand-block { padding: 24px 16px 14px; }
    .scenarios-grid { grid-template-columns: repeat(2, 1fr); }
    .cta-card { padding: 36px; grid-template-columns: 1fr; gap: 32px; }
    .hero-h1 { font-size: 40px; }
    .stats-container { grid-template-columns: repeat(2, 1fr); gap: 16px; }
    .faq-grid { grid-template-columns: 1fr; }
    .guide-panel { position: static; }
  }

  @media (max-width: 768px) {
    .app-sidebar { display: none; }
    .mobile-topbar { display: flex; }
    .mobile-drawer { display: flex; visibility: hidden; }
    .mobile-drawer.open { visibility: visible; }
    .app-main { margin-left: 0; padding: 20px; padding-top: 84px; }
    .container-inner { max-width: 100%; }
    .section-space { margin-top: 56px; }

    .hero-section { padding: 48px 24px; border-radius: 18px; min-height: auto; }
    .hero-h1 { font-size: 34px; }
    .hero-h1 .hero-cat { font-size: 22px; }
    .hero-desc { font-size: 15px; }
    .hero-actions { flex-direction: column; align-items: stretch; }
    .hero-actions .btn { width: 100%; }

    .stats-container { grid-template-columns: repeat(2, 1fr); gap: 14px; }
    .stat-card { padding: 16px 18px; }
    .stat-num { font-size: 28px; }

    .highlights-grid { grid-template-columns: 1fr; }
    .highlight-card.featured { grid-row: auto; }

    .scenarios-grid { grid-template-columns: 1fr 1fr; gap: 16px; }
    .scenario-card { padding: 18px 16px; }
    .scenario-card h3 { font-size: 15px; }
    .scenario-card p { font-size: 13px; }

    .faq-grid { gap: 24px; }
    .cta-card { padding: 22px; border-radius: 16px; }
    .cta-form-row { grid-template-columns: 1fr; gap: 12px; }
    .cta-title { font-size: 22px; }

    .site-footer { padding: 40px 20px 20px; }
    .footer-grid { grid-template-columns: 1fr; gap: 32px; }
    .footer-bottom { flex-direction: column; gap: 8px; align-items: flex-start; }
  }

  @media (max-width: 520px) {
    .hero-h1 { font-size: 28px; }
    .hero-h1 .hero-cat { font-size: 18px; }
    .stats-container { grid-template-columns: 1fr 1fr; }
    .scenarios-grid { grid-template-columns: 1fr; }
    .section-title { font-size: 22px; }
    .section-header { margin-bottom: 24px; }
    .section-space { margin-top: 48px; }
    .app-main { padding: 16px; padding-top: 76px; }
    .footer-grid { gap: 24px; }
  }