/* roulang page: index */
:root {
  --bg: #0B0A12;
  --card: #16131E;
  --card2: #1D1929;
  --border: #262230;
  --border-soft: rgba(255,255,255,0.08);
  --text: #F5F3F7;
  --text2: #B8B2C4;
  --grad: linear-gradient(135deg, #7C3AED 0%, #C026D3 50%, #F43F5E 100%);
  --accent: #2DD4BF;
  --warn: #F59E0B;
  --radius: 20px;
  --radius-sm: 10px;
  --radius-full: 999px;
  --font: 'PingFang SC', 'Microsoft YaHei', 'HarmonyOS Sans SC', 'Source Han Sans SC', system-ui, -apple-system, sans-serif;
  --shadow-1: 0 2px 12px rgba(0,0,0,0.18);
  --shadow-2: 0 8px 30px rgba(0,0,0,0.24);
  --transition: 0.28s cubic-bezier(0.4, 0, 0.2, 1);
}
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  line-height: 1.8;
  font-size: 16px;
  overflow-x: hidden;
}
img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; transition: color var(--transition); }
a:hover { color: var(--accent); }
button, input, select, textarea { font-family: var(--font); outline: none; }
.container { max-width: 1200px; margin: 0 auto; padding: 0 24px; position: relative; }
.section { padding: 100px 0; }
.section-tight { padding: 72px 0; }
.text-secondary { color: var(--text2); }
.gradient-text {
  background: var(--grad);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}
.section-title {
  font-size: clamp(1.6rem, 3vw, 2.2rem);
  font-weight: 800;
  line-height: 1.4;
  margin-bottom: 12px;
  letter-spacing: -0.02em;
}
.section-sub {
  color: var(--text2);
  font-size: 1rem;
  margin-bottom: 48px;
  max-width: 620px;
}
.text-center { text-align: center; }
.mx-auto { margin-left: auto; margin-right: auto; }
/* === NAV === */
.nav-dock {
  position: fixed;
  top: 14px;
  left: 50%;
  transform: translateX(-50%);
  width: min(1200px, calc(100% - 32px));
  z-index: 1000;
  border-radius: var(--radius-full);
  background: rgba(13,10,20,0.82);
  -webkit-backdrop-filter: blur(14px);
  backdrop-filter: blur(14px);
  border: 1px solid var(--border-soft);
  box-shadow: 0 4px 20px rgba(0,0,0,0.25);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 10px 20px 10px 16px;
  transition: box-shadow 0.3s;
}
.nav-dock.scrolled { box-shadow: 0 8px 32px rgba(0,0,0,0.45); }
.nav-brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 800;
  font-size: 0.98rem;
  color: var(--text);
  white-space: nowrap;
}
.nav-brand .brand-badge {
  width: 34px;
  height: 34px;
  border-radius: 50%;
  background: var(--grad);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-size: 0.85rem;
  flex-shrink: 0;
  box-shadow: 0 0 16px rgba(192,38,211,0.35);
}
.nav-links {
  display: flex;
  align-items: center;
  gap: 4px;
  flex: 1;
  justify-content: center;
  margin: 0 16px;
}
.nav-links a {
  padding: 8px 18px;
  border-radius: var(--radius-full);
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--text2);
  white-space: nowrap;
  transition: all var(--transition);
}
.nav-links a:hover { color: var(--accent); }
.nav-links a.active {
  background: var(--grad);
  color: #fff;
  font-weight: 600;
}
.nav-cta {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
}
.nav-cta .btn-nav {
  padding: 8px 20px;
  border-radius: var(--radius-full);
  background: rgba(124,58,237,0.18);
  border: 1px solid rgba(124,58,237,0.4);
  color: #fff;
  font-size: 0.85rem;
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition);
  white-space: nowrap;
}
.nav-cta .btn-nav:hover {
  background: var(--grad);
  border-color: transparent;
  transform: translateY(-1px);
}
.nav-burger {
  display: none;
  width: 38px;
  height: 38px;
  border-radius: 50%;
  background: rgba(255,255,255,0.08);
  border: 1px solid var(--border-soft);
  color: var(--text);
  font-size: 1rem;
  cursor: pointer;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

/* === HERO === */
.hero {
  position: relative;
  min-height: 640px;
  display: flex;
  align-items: center;
  padding: 160px 0 80px;
  background-image: url('/assets/images/backpic/back-1.png');
  background-size: cover;
  background-position: center;
  overflow: hidden;
}
.hero-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(120deg, rgba(11,10,18,0.94) 0%, rgba(11,10,18,0.82) 40%, rgba(124,58,237,0.38) 100%);
}
.hero-inner {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 60px;
  align-items: center;
  position: relative;
  z-index: 2;
}
.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 16px;
  border-radius: var(--radius-full);
  background: rgba(45,212,191,0.12);
  border: 1px solid rgba(45,212,191,0.3);
  color: var(--accent);
  font-size: 0.8rem;
  font-weight: 600;
  margin-bottom: 20px;
  letter-spacing: 0.02em;
}
.hero h1 {
  font-size: clamp(2.1rem, 5vw, 3.4rem);
  font-weight: 800;
  line-height: 1.3;
  margin-bottom: 16px;
  letter-spacing: -0.03em;
}
.hero-lead {
  color: var(--text2);
  font-size: 1.05rem;
  line-height: 1.9;
  margin-bottom: 28px;
  max-width: 480px;
}
.hero-actions {
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
}
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 28px;
  border-radius: var(--radius-full);
  font-size: 0.92rem;
  font-weight: 600;
  cursor: pointer;
  border: 1px solid transparent;
  transition: all var(--transition);
  line-height: 1.4;
  text-decoration: none;
}
.btn-primary {
  background: var(--grad);
  color: #fff;
  box-shadow: 0 4px 20px rgba(192,38,211,0.25);
}
.btn-primary:hover {
  filter: brightness(1.15);
  color: #fff;
  transform: translateY(-2px);
  box-shadow: 0 8px 28px rgba(192,38,211,0.35);
}
.btn-primary:active { transform: translateY(0) scale(0.98); }
.btn-secondary {
  background: transparent;
  border-color: var(--border);
  color: var(--text);
}
.btn-secondary:hover {
  border-color: var(--accent);
  color: var(--accent);
  transform: translateY(-2px);
}
.btn-secondary:active { transform: scale(0.98); }

/* Hero query card */
.query-card {
  background: rgba(255,255,255,0.04);
  border: 1px solid var(--border-soft);
  border-radius: 24px;
  padding: 32px 28px;
  backdrop-filter: blur(10px);
}
.query-card .q-title {
  font-size: 1.1rem;
  font-weight: 700;
  margin-bottom: 4px;
}
.query-card .q-sub {
  font-size: 0.82rem;
  color: var(--text2);
  margin-bottom: 20px;
}
.query-form .form-group { margin-bottom: 14px; }
.query-form label {
  display: block;
  font-size: 0.8rem;
  color: var(--text2);
  margin-bottom: 6px;
  letter-spacing: 0.02em;
}
.query-form input {
  width: 100%;
  height: 46px;
  border-radius: var(--radius-sm);
  background: #100D18;
  border: 1px solid var(--border);
  color: var(--text);
  padding: 0 14px;
  font-size: 0.88rem;
  transition: all var(--transition);
}
.query-form input::placeholder { color: rgba(184,178,196,0.5); }
.query-form input:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(45,212,191,0.12);
}
.query-form .btn-query {
  width: 100%;
  height: 46px;
  border-radius: var(--radius-full);
  background: var(--grad);
  border: none;
  color: #fff;
  font-size: 0.9rem;
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition);
  margin-top: 4px;
}
.query-form .btn-query:hover {
  filter: brightness(1.12);
  transform: translateY(-1px);
}
.privacy-note {
  font-size: 0.75rem;
  color: var(--text2);
  margin-top: 14px;
  display: flex;
  align-items: flex-start;
  gap: 6px;
  line-height: 1.6;
}
.privacy-note i { color: var(--accent); margin-top: 3px; }

/* === PAIN POINTS === */
.pain-section { background: var(--bg); }
.pain-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.pain-card {
  background: var(--card);
  border: 1px solid var(--border-soft);
  border-radius: var(--radius);
  padding: 32px 26px;
  transition: all var(--transition);
}
.pain-card:hover {
  transform: translateY(-4px);
  border-color: rgba(124,58,237,0.4);
  box-shadow: var(--shadow-2);
}
.pain-icon {
  width: 46px;
  height: 46px;
  border-radius: 50%;
  background: var(--grad);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-size: 1rem;
  margin-bottom: 18px;
  box-shadow: 0 4px 14px rgba(192,38,211,0.3);
}
.pain-card h3 {
  font-size: 1.2rem;
  font-weight: 700;
  margin-bottom: 10px;
}
.pain-card p {
  color: var(--text2);
  font-size: 0.9rem;
  line-height: 1.7;
}

/* === SOLUTION === */
.solution-section { background: linear-gradient(180deg, var(--bg) 0%, #100D18 100%); }
.solution-main {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 40px;
  background: var(--card);
  border: 1px solid var(--border-soft);
  border-radius: 24px;
  padding: 44px;
  margin-bottom: 24px;
  align-items: center;
  transition: all var(--transition);
}
.solution-main:hover { border-color: rgba(124,58,237,0.35); }
.solution-main-content h3 {
  font-size: 1.5rem;
  font-weight: 700;
  margin-bottom: 14px;
  line-height: 1.4;
}
.solution-main-content p {
  color: var(--text2);
  font-size: 0.95rem;
  margin-bottom: 20px;
  line-height: 1.8;
}
.solution-main-img img {
  border-radius: 16px;
  width: 100%;
  object-fit: cover;
  aspect-ratio: 16/10;
}
.solution-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
}
.solution-card {
  background: var(--card2);
  border: 1px solid var(--border-soft);
  border-radius: var(--radius);
  padding: 28px 26px;
  transition: all var(--transition);
}
.solution-card:hover {
  transform: translateY(-4px);
  border-color: rgba(45,212,191,0.35);
}
.solution-card .step {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background: rgba(45,212,191,0.15);
  color: var(--accent);
  font-size: 0.8rem;
  font-weight: 700;
  margin-bottom: 12px;
}
.solution-card h4 {
  font-size: 1.05rem;
  font-weight: 700;
  margin-bottom: 8px;
  color: var(--text);
}
.solution-card p {
  color: var(--text2);
  font-size: 0.88rem;
  line-height: 1.7;
}
.solution-card ul {
  list-style: none;
  margin-top: 10px;
  padding: 0;
}
.solution-card ul li {
  font-size: 0.83rem;
  color: var(--text2);
  padding: 3px 0;
  display: flex;
  align-items: center;
  gap: 6px;
}
.solution-card ul li i { color: var(--accent); font-size: 0.7rem; }

/* === DATA === */
.data-section { background: var(--bg); position: relative; overflow: hidden; }
.data-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}
.data-item {
  text-align: center;
  background: var(--card);
  border: 1px solid var(--border-soft);
  border-radius: var(--radius);
  padding: 36px 16px;
  transition: all var(--transition);
  position: relative;
  overflow: hidden;
}
.data-item::before {
  content: '';
  position: absolute;
  top: -30px;
  left: 50%;
  transform: translateX(-50%);
  width: 72px;
  height: 72px;
  background: radial-gradient(circle, rgba(192,38,211,0.25) 0%, transparent 70%);
  border-radius: 50%;
}
.data-item:hover { transform: translateY(-4px); border-color: rgba(124,58,237,0.4); }
.data-number {
  font-size: clamp(2rem, 4vw, 2.8rem);
  font-weight: 800;
  line-height: 1.2;
  background: var(--grad);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}
.data-label {
  font-size: 0.85rem;
  color: var(--text2);
  margin-top: 6px;
  letter-spacing: 0.03em;
}

/* === NEWS / CMS === */
.news-section { background: linear-gradient(180deg, var(--bg), #0D0B16); }
.news-list {
  display: flex;
  flex-direction: column;
  gap: 28px;
}
.news-card {
  display: grid;
  grid-template-columns: 0.9fr 1.1fr;
  gap: 28px;
  background: var(--card);
  border: 1px solid var(--border-soft);
  border-radius: var(--radius);
  overflow: hidden;
  transition: all var(--transition);
}
.news-card:hover {
  transform: translateY(-4px);
  border-color: rgba(124,58,237,0.35);
  box-shadow: var(--shadow-2);
}
.news-card:nth-child(even) { direction: rtl; }
.news-card:nth-child(even) > * { direction: ltr; }
.news-thumb {
  position: relative;
  overflow: hidden;
  min-height: 180px;
}
.news-thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.5s ease;
}
.news-card:hover .news-thumb img { transform: scale(1.04); }
.news-body {
  padding: 28px 28px 28px 0;
  display: flex;
  flex-direction: column;
  justify-content: center;
}
.news-card:nth-child(even) .news-body { padding: 28px 0 28px 28px; }
.news-meta {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 10px;
  font-size: 0.8rem;
  color: var(--text2);
}
.news-tag {
  display: inline-block;
  padding: 3px 12px;
  border-radius: var(--radius-full);
  background: rgba(45,212,191,0.12);
  border: 1px solid rgba(45,212,191,0.25);
  color: var(--accent);
  font-size: 0.75rem;
  font-weight: 600;
  white-space: nowrap;
}
.news-body h3 {
  font-size: 1.15rem;
  font-weight: 700;
  margin-bottom: 10px;
  line-height: 1.5;
}
.news-body h3 a { color: var(--text); }
.news-body h3 a:hover { color: var(--accent); }
.news-body p {
  color: var(--text2);
  font-size: 0.88rem;
  line-height: 1.7;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  margin-bottom: 14px;
}
.news-link {
  font-size: 0.82rem;
  color: var(--accent);
  font-weight: 600;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  cursor: pointer;
  transition: all var(--transition);
}
.news-link:hover { color: var(--text); gap: 10px; }
.empty-state {
  border: 1px dashed var(--border);
  border-radius: var(--radius);
  padding: 50px 30px;
  text-align: center;
  color: var(--text2);
  font-size: 0.92rem;
  background: rgba(22,19,30,0.4);
}
.empty-state i {
  font-size: 2rem;
  display: block;
  margin-bottom: 12px;
  color: var(--border);
}

/* === CTA BANNER === */
.cta-section {
  position: relative;
  padding: 100px 0;
  background-image: url('/assets/images/backpic/back-2.png');
  background-size: cover;
  background-position: center;
  border-radius: 0;
  overflow: hidden;
}
.cta-section .cta-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(120deg, rgba(11,10,18,0.88) 0%, rgba(124,58,237,0.48) 100%);
}
.cta-content {
  position: relative;
  z-index: 2;
  text-align: center;
  max-width: 700px;
  margin: 0 auto;
}
.cta-content h2 {
  font-size: clamp(1.7rem, 3.4vw, 2.4rem);
  font-weight: 800;
  line-height: 1.4;
  margin-bottom: 16px;
}
.cta-content p {
  color: var(--text2);
  font-size: 0.98rem;
  margin-bottom: 28px;
  line-height: 1.8;
}
.cta-content .btn {
  font-size: 1rem;
  padding: 14px 36px;
}

/* === REVEAL MODAL === */
.reveal-modal {
  background: var(--card);
  border-radius: 24px;
  border: 1px solid var(--border-soft);
  padding: 36px 32px 28px;
  max-width: 480px;
  margin: 0 auto;
  box-shadow: var(--shadow-2);
}
.reveal-modal .modal-title {
  font-size: 1.25rem;
  font-weight: 700;
  margin-bottom: 6px;
  color: var(--text);
}
.reveal-modal .modal-sub {
  font-size: 0.82rem;
  color: var(--text2);
  margin-bottom: 22px;
}
.reveal-modal label {
  display: block;
  font-size: 0.8rem;
  color: var(--text2);
  margin-bottom: 5px;
}
.reveal-modal input,
.reveal-modal select,
.reveal-modal textarea {
  width: 100%;
  height: 46px;
  border-radius: var(--radius-sm);
  background: #100D18;
  border: 1px solid var(--border);
  color: var(--text);
  padding: 8px 14px;
  font-size: 0.88rem;
  transition: all var(--transition);
  margin-bottom: 16px;
}
.reveal-modal input:focus,
.reveal-modal select:focus,
.reveal-modal textarea:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(45,212,191,0.12);
}
.reveal-modal textarea { height: auto; line-height: 1.6; }
.reveal-modal .btn-submit {
  width: 100%;
  height: 48px;
  border-radius: var(--radius-full);
  background: var(--grad);
  color: #fff;
  border: none;
  font-size: 0.92rem;
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition);
  margin-top: 4px;
}
.reveal-modal .btn-submit:hover {
  filter: brightness(1.12);
  transform: translateY(-1px);
  box-shadow: 0 6px 20px rgba(192,38,211,0.35);
}
.reveal-modal .privacy-note {
  margin-top: 18px;
  text-align: center;
  font-size: 0.75rem;
  color: var(--text2);
}
.reveal-modal .close-button {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background: rgba(255,255,255,0.08);
  border: 1px solid var(--border-soft);
  color: var(--text);
  font-size: 1rem;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all var(--transition);
  right: 16px;
  top: 16px;
}
.reveal-modal .close-button:hover {
  background: rgba(244,63,94,0.2);
  color: #fff;
}

/* === FAQ === */
.faq-section { background: var(--bg); }
.faq-wrap { max-width: 820px; margin: 0 auto; }
.faq-item {
  background: var(--card);
  border: 1px solid var(--border-soft);
  border-radius: var(--radius);
  margin-bottom: 16px;
  overflow: hidden;
  transition: all var(--transition);
}
.faq-item:hover { border-color: rgba(124,58,237,0.3); }
.faq-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 20px 24px;
  cursor: pointer;
  font-size: 1rem;
  font-weight: 600;
  color: var(--text);
  transition: color var(--transition);
}
.faq-head:hover { color: var(--accent); }
.faq-head .faq-icon {
  width: 26px;
  height: 26px;
  border-radius: 50%;
  background: rgba(124,58,237,0.15);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.8rem;
  color: #a78bfa;
  flex-shrink: 0;
  transition: transform 0.3s ease, background 0.3s ease;
}
.faq-item.active .faq-icon {
  transform: rotate(45deg);
  background: var(--grad);
  color: #fff;
}
.faq-body {
  max-height: 0;
  overflow: hidden;
  padding: 0 24px;
  color: var(--text2);
  font-size: 0.9rem;
  line-height: 1.8;
  transition: max-height 0.35s ease, padding 0.35s ease;
}
.faq-item.active .faq-body {
  max-height: 300px;
  padding: 0 24px 20px;
}
.faq-body p { margin-bottom: 8px; }
.faq-body ul { padding-left: 18px; margin-top: 6px; }
.faq-body ul li { margin-bottom: 4px; }

/* === FOOTER === */
.footer {
  background: #08070D;
  border-top: 1px solid rgba(124,58,237,0.2);
  padding: 64px 0 24px;
  position: relative;
}
.footer::before {
  content: '';
  position: absolute;
  top: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 60%;
  height: 1px;
  background: var(--grad);
  opacity: 0.6;
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr;
  gap: 48px;
  margin-bottom: 48px;
}
.footer-brand .f-logo {
  font-size: 1rem;
  font-weight: 800;
  color: var(--text);
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 14px;
}
.footer-brand p {
  font-size: 0.85rem;
  color: var(--text2);
  line-height: 1.7;
  max-width: 300px;
}
.footer-col h4 {
  font-size: 0.9rem;
  font-weight: 700;
  margin-bottom: 16px;
  color: var(--text);
}
.footer-col ul { list-style: none; }
.footer-col ul li { margin-bottom: 9px; }
.footer-col ul li a {
  font-size: 0.83rem;
  color: var(--text2);
  transition: all var(--transition);
}
.footer-col ul li a:hover { color: var(--accent); padding-left: 4px; }
.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.06);
  padding-top: 24px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 10px;
  font-size: 0.78rem;
  color: rgba(184,178,196,0.6);
}
.footer-bottom a { color: rgba(184,178,196,0.6); }
.footer-bottom a:hover { color: var(--accent); }

/* === BACK TO TOP === */
.back-top {
  position: fixed;
  bottom: 28px;
  right: 28px;
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: var(--grad);
  color: #fff;
  border: none;
  font-size: 0.9rem;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 4px 16px rgba(192,38,211,0.35);
  z-index: 999;
  transition: all var(--transition);
  opacity: 0;
  visibility: hidden;
}
.back-top.show { opacity: 1; visibility: visible; }
.back-top:hover { transform: translateY(-3px); filter: brightness(1.15); }

/* === RESPONSIVE === */
@media screen and (max-width: 1024px) {
  .hero-inner { grid-template-columns: 1fr; gap: 40px; }
  .hero { padding-top: 140px; }
  .pain-grid { grid-template-columns: repeat(3, 1fr); gap: 16px; }
  .pain-card { padding: 24px 20px; }
  .solution-main { grid-template-columns: 1fr; padding: 32px; }
  .data-grid { grid-template-columns: repeat(2, 1fr); gap: 16px; }
  .section { padding: 80px 0; }
  .nav-links { gap: 2px; }
  .nav-links a { padding: 8px 12px; font-size: 0.8rem; }
}
@media screen and (max-width: 768px) {
  .section { padding: 60px 0; }
  .nav-dock { width: calc(100% - 20px); top: 10px; padding: 8px 12px; border-radius: 20px; }
  .nav-links {
    position: absolute;
    top: calc(100% + 8px);
    left: 0;
    right: 0;
    flex-direction: column;
    background: rgba(13,10,20,0.95);
    border-radius: 16px;
    border: 1px solid var(--border-soft);
    padding: 12px;
    gap: 4px;
    display: none;
    -webkit-backdrop-filter: blur(20px);
    backdrop-filter: blur(20px);
    box-shadow: var(--shadow-2);
  }
  .nav-links.open { display: flex; }
  .nav-links a { width: 100%; text-align: center; padding: 10px; }
  .nav-burger { display: flex; }
  .nav-cta .btn-nav { display: none; }
  .hero { min-height: auto; padding: 120px 0 56px; }
  .hero h1 { font-size: clamp(1.8rem, 6vw, 2.4rem); }
  .pain-grid { grid-template-columns: 1fr; gap: 16px; }
  .solution-grid { grid-template-columns: 1fr; gap: 16px; }
  .news-card { grid-template-columns: 1fr; gap: 0; }
  .news-body { padding: 20px 20px 24px; }
  .news-card:nth-child(even) { direction: ltr; }
  .news-card:nth-child(even) .news-body { padding: 20px 20px 24px; }
  .news-thumb { min-height: auto; aspect-ratio: 16/10; }
  .footer-grid { grid-template-columns: 1fr; gap: 32px; }
  .footer-bottom { flex-direction: column; text-align: center; }
  .back-top { bottom: 16px; right: 16px; width: 38px; height: 38px; }
  .hero-actions .btn { width: 100%; justify-content: center; }
  .data-grid { gap: 12px; }
  .data-item { padding: 24px 12px; }
}
@media screen and (max-width: 520px) {
  .query-card { padding: 24px 18px; }
  .solution-main { padding: 24px 18px; }
  .reveal-modal { padding: 28px 18px 20px; }
  .section-title { font-size: 1.5rem; }
  .solution-main-content h3 { font-size: 1.25rem; }
  .data-grid { grid-template-columns: repeat(2, 1fr); }
  .cta-section { padding: 64px 0; }
}

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

/* roulang page: category1 */
:root {
  --bg: #0B0A12;
  --card: #16131E;
  --card-2: #1D1929;
  --border: #262230;
  --border-soft: rgba(255,255,255,0.08);
  --text: #F5F3F7;
  --text-sub: #B8B2C4;
  --grad: linear-gradient(135deg, #7C3AED, #C026D3, #F43F5E);
  --accent: #2DD4BF;
  --warn: #F59E0B;
  --radius-sm: 10px;
  --radius-card: 20px;
  --radius-full: 999px;
  --section-space: 110px;
  --font-stack: 'PingFang SC', 'Microsoft YaHei', 'HarmonyOS Sans SC', 'Source Han Sans SC', system-ui, -apple-system, sans-serif;
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-stack);
  background: var(--bg);
  color: var(--text);
  line-height: 1.8;
  font-size: 0.95rem;
  overflow-x: hidden;
}

a {
  color: inherit;
  text-decoration: none;
  transition: color 0.25s ease;
}

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

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

input, textarea {
  font-family: inherit;
}

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

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

.section {
  padding: var(--section-space) 0;
}

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

.section-alt {
  background: linear-gradient(180deg, var(--bg) 0%, #0D0B14 50%, var(--bg) 100%);
}

.section-head {
  text-align: center;
  max-width: 720px;
  margin: 0 auto 56px;
}

.section-head .eyebrow {
  display: inline-block;
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  color: var(--accent);
  border: 1px solid rgba(45, 212, 191, 0.3);
  background: rgba(45, 212, 191, 0.06);
  padding: 4px 14px;
  border-radius: var(--radius-full);
  margin-bottom: 14px;
  text-transform: uppercase;
}

.section-head h2 {
  font-size: clamp(1.6rem, 3vw, 2.2rem);
  font-weight: 800;
  line-height: 1.3;
  letter-spacing: -0.02em;
  margin-bottom: 14px;
}

.section-head p {
  color: var(--text-sub);
  font-size: 1rem;
  line-height: 1.8;
}

/* 按钮 */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 28px;
  border-radius: var(--radius-full);
  font-weight: 600;
  font-size: 0.95rem;
  border: none;
  cursor: pointer;
  transition: transform 0.25s ease, box-shadow 0.25s ease, filter 0.25s ease, border-color 0.25s ease, color 0.25s ease;
  line-height: 1.4;
  white-space: nowrap;
}

.btn i {
  font-size: 0.85rem;
}

.btn-primary {
  background: var(--grad);
  color: #fff;
  box-shadow: 0 8px 24px rgba(192, 38, 211, 0.25);
}

.btn-primary:hover {
  transform: translateY(-2px);
  filter: brightness(1.12);
  box-shadow: 0 12px 30px rgba(192, 38, 211, 0.35);
  color: #fff;
}

.btn-primary:active {
  transform: translateY(0) scale(0.98);
}

.btn-ghost {
  background: transparent;
  color: var(--text);
  border: 1px solid rgba(255, 255, 255, 0.18);
}

.btn-ghost:hover {
  border-color: var(--accent);
  color: var(--accent);
  transform: translateY(-2px);
}

.btn-ghost:active {
  transform: translateY(0) scale(0.98);
}

.btn-lg {
  padding: 14px 36px;
  font-size: 1rem;
}

/* Dock 导航 */
.nav-dock {
  position: fixed;
  top: 14px;
  left: 50%;
  transform: translateX(-50%);
  width: min(1200px, calc(100% - 32px));
  z-index: 1000;
  display: flex;
  align-items: center;
  padding: 10px 12px 10px 18px;
  background: rgba(13, 10, 20, 0.82);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border: 1px solid var(--border-soft);
  border-radius: var(--radius-full);
  box-shadow: 0 4px 18px rgba(0, 0, 0, 0.28);
  transition: box-shadow 0.3s ease;
}

.nav-dock.scrolled {
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.45);
}

.nav-brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  font-size: 1rem;
  color: var(--text);
  letter-spacing: -0.01em;
}

.brand-badge {
  width: 32px;
  height: 32px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  background: var(--grad);
  color: #fff;
  font-size: 0.9rem;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 4px;
  margin-left: 24px;
}

.nav-links a {
  padding: 8px 16px;
  border-radius: var(--radius-full);
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--text-sub);
  transition: background 0.25s ease, color 0.25s ease;
}

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

.nav-links a.active {
  background: var(--grad);
  color: #fff;
}

.nav-cta {
  margin-left: auto;
  display: flex;
  align-items: center;
  gap: 10px;
}

.btn-nav {
  background: var(--grad);
  color: #fff;
  border: none;
  border-radius: var(--radius-full);
  padding: 8px 18px;
  font-size: 0.85rem;
  font-weight: 600;
  transition: filter 0.25s ease, transform 0.25s ease;
}

.btn-nav:hover {
  filter: brightness(1.15);
  transform: translateY(-1px);
}

.btn-nav:active {
  transform: scale(0.97);
}

.nav-burger {
  display: none;
  width: 38px;
  height: 38px;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  border: 1px solid var(--border-soft);
  background: rgba(255, 255, 255, 0.04);
  color: var(--text);
  font-size: 1rem;
}

/* Hero */
.page-hero {
  position: relative;
  min-height: 640px;
  display: flex;
  align-items: center;
  padding: 180px 0 110px;
  background-size: cover;
  background-position: center;
}

.hero-mask {
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(11, 10, 18, 0.78) 10%, rgba(11, 10, 18, 0.62) 55%, rgba(11, 10, 18, 0.85) 100%);
}

.hero-inner {
  position: relative;
  z-index: 2;
  text-align: center;
  max-width: 860px;
  margin: 0 auto;
}

.hero-inner .eyebrow {
  display: inline-block;
  padding: 6px 18px;
  border-radius: var(--radius-full);
  background: rgba(45, 212, 191, 0.08);
  border: 1px solid rgba(45, 212, 191, 0.3);
  color: var(--accent);
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  margin-bottom: 24px;
}

.hero-inner h1 {
  font-size: clamp(2.1rem, 5vw, 3.4rem);
  font-weight: 800;
  line-height: 1.25;
  letter-spacing: -0.02em;
  margin-bottom: 22px;
  background: linear-gradient(120deg, #fff, #E4E0F0);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-inner .hero-desc {
  font-size: 1.05rem;
  color: var(--text-sub);
  max-width: 640px;
  margin: 0 auto 36px;
  line-height: 1.9;
}

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

.hero-meta {
  display: flex;
  justify-content: center;
  gap: 28px;
  margin-top: 48px;
  flex-wrap: wrap;
}

.hero-meta span {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 0.85rem;
  color: var(--text-sub);
}

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

/* 价值卡片 */
.value-card {
  background: var(--card);
  border: 1px solid var(--border-soft);
  border-radius: var(--radius-card);
  padding: 36px 28px;
  height: 100%;
  transition: transform 0.3s ease, border-color 0.3s ease, box-shadow 0.3s ease;
}

.value-card:hover {
  transform: translateY(-4px);
  border-color: rgba(255, 255, 255, 0.16);
  box-shadow: 0 14px 36px rgba(0, 0, 0, 0.3);
}

.value-icon {
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: var(--grad);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-size: 1.1rem;
  margin-bottom: 20px;
}

.value-card h3 {
  font-size: 1.2rem;
  font-weight: 700;
  margin-bottom: 12px;
}

.value-card p {
  color: var(--text-sub);
  font-size: 0.92rem;
  line-height: 1.75;
  margin-bottom: 0;
}

/* 图文交错 */
.split-block {
  display: flex;
  align-items: center;
  gap: 56px;
}

.split-media {
  flex: 0 0 46%;
  position: relative;
}

.split-media img {
  width: 100%;
  aspect-ratio: 16 / 10;
  object-fit: cover;
  border-radius: 16px;
  border: 1px solid var(--border-soft);
  box-shadow: 0 8px 28px rgba(0, 0, 0, 0.3);
  transition: transform 0.5s ease;
}

.split-block:hover .split-media img {
  transform: scale(1.02);
}

.split-media::after {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: 16px;
  background: linear-gradient(180deg, rgba(11, 10, 18, 0.1) 0%, rgba(11, 10, 18, 0.02) 40%, rgba(11, 10, 18, 0.35) 100%);
  pointer-events: none;
}

.split-content {
  flex: 1;
  padding-left: 16px;
}

.split-content .tag {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  color: var(--accent);
  background: rgba(45, 212, 191, 0.08);
  border: 1px solid rgba(45, 212, 191, 0.25);
  padding: 4px 12px;
  border-radius: var(--radius-full);
  margin-bottom: 16px;
}

.split-content h2 {
  font-size: clamp(1.6rem, 3vw, 2.1rem);
  font-weight: 800;
  line-height: 1.3;
  margin-bottom: 16px;
}

.split-content .lead {
  font-size: 1rem;
  color: var(--text-sub);
  line-height: 1.9;
  margin-bottom: 22px;
}

.check-list li {
  position: relative;
  padding-left: 30px;
  color: var(--text-sub);
  font-size: 0.92rem;
  line-height: 1.7;
  margin-bottom: 10px;
}

.check-list li::before {
  content: "\f00c";
  font-family: "Font Awesome 6 Free";
  font-weight: 900;
  position: absolute;
  left: 0;
  top: 2px;
  color: var(--accent);
  font-size: 0.85rem;
}

/* 数据徽章 */
.badge-card {
  background: var(--grad);
  border-radius: var(--radius-card);
  padding: 36px 20px 30px;
  text-align: center;
  height: 100%;
  position: relative;
  overflow: hidden;
}

.badge-card::before {
  content: "";
  position: absolute;
  width: 140px;
  height: 140px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.08);
  top: -40px;
  right: -40px;
}

.badge-num {
  font-size: clamp(2rem, 4vw, 2.8rem);
  font-weight: 800;
  color: #fff;
  line-height: 1.1;
  margin-bottom: 6px;
}

.badge-label {
  color: rgba(255, 255, 255, 0.85);
  font-size: 0.85rem;
  font-weight: 500;
  letter-spacing: 0.03em;
}

.badge-card .badge-icon {
  font-size: 1.2rem;
  color: rgba(255, 255, 255, 0.7);
  margin-bottom: 10px;
}

.badge-wrap {
  padding: 0 12px;
  margin-bottom: 24px;
}

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

.accordion {
  background: transparent;
  list-style: none;
  margin: 0;
}

.accordion-item {
  background: var(--card);
  border: 1px solid var(--border-soft);
  border-radius: var(--radius-card);
  margin-bottom: 16px;
  overflow: hidden;
  transition: border-color 0.3s ease, box-shadow 0.3s ease;
}

.accordion-item.is-active {
  border-color: rgba(45, 212, 191, 0.2);
  box-shadow: 0 8px 28px rgba(0, 0, 0, 0.18);
}

.accordion-title {
  display: block;
  position: relative;
  padding: 22px 56px 22px 24px;
  background: transparent !important;
  border: none !important;
  color: var(--text) !important;
  font-size: 1rem;
  font-weight: 600;
  line-height: 1.5;
  transition: color 0.25s ease;
}

.accordion-title:hover,
.accordion-title:focus {
  color: var(--accent) !important;
  background: rgba(255, 255, 255, 0.02) !important;
}

.accordion-title::before {
  content: none !important;
}

.accordion-title::after {
  content: "+";
  position: absolute;
  right: 24px;
  top: 50%;
  transform: translateY(-50%);
  width: 28px;
  height: 28px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  background: rgba(45, 212, 191, 0.1);
  color: var(--accent);
  font-size: 1.1rem;
  font-weight: 400;
  line-height: 1;
  transition: transform 0.3s ease, background 0.3s ease;
}

.accordion-item.is-active .accordion-title::after {
  transform: translateY(-50%) rotate(45deg);
  background: var(--grad);
  color: #fff;
}

.accordion-content {
  background: transparent !important;
  border: none !important;
  padding: 0 24px 24px !important;
  color: var(--text-sub);
  font-size: 0.9rem;
  line-height: 1.8;
}

/* CTA 区块 */
.cta-band {
  position: relative;
  padding: 100px 0;
  background-size: cover;
  background-position: center;
  text-align: center;
}

.cta-mask {
  position: absolute;
  inset: 0;
  background: linear-gradient(120deg, rgba(124, 58, 237, 0.42) 0%, rgba(11, 10, 18, 0.78) 50%, rgba(11, 10, 18, 0.92) 100%);
}

.cta-inner {
  position: relative;
  z-index: 2;
  max-width: 660px;
  margin: 0 auto;
}

.cta-inner h2 {
  font-size: clamp(1.6rem, 3.4vw, 2.4rem);
  font-weight: 800;
  line-height: 1.3;
  margin-bottom: 16px;
}

.cta-inner p {
  color: var(--text-sub);
  font-size: 1rem;
  line-height: 1.8;
  margin-bottom: 32px;
}

.cta-actions {
  display: flex;
  justify-content: center;
  gap: 14px;
  flex-wrap: wrap;
}

/* Footer */
.footer {
  background: #08070D;
  border-top: 1px solid var(--border-soft);
  padding: 80px 0 28px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.6fr 0.8fr 0.9fr;
  gap: 48px;
  padding-bottom: 48px;
}

.f-logo {
  font-size: 1.05rem;
  font-weight: 700;
  margin-bottom: 14px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.footer-brand p {
  color: var(--text-sub);
  font-size: 0.88rem;
  line-height: 1.85;
  max-width: 380px;
}

.footer-col h4 {
  font-size: 0.95rem;
  font-weight: 700;
  margin-bottom: 18px;
  color: var(--text);
}

.footer-col ul li {
  margin-bottom: 12px;
}

.footer-col ul a {
  color: var(--text-sub);
  font-size: 0.88rem;
  transition: color 0.2s ease;
}

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

.footer-bottom {
  border-top: 1px solid var(--border-soft);
  padding-top: 24px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
  font-size: 0.8rem;
  color: rgba(184, 178, 196, 0.7);
}

/* Reveal 弹层 */
.reveal {
  background: var(--card);
  border: 1px solid var(--border-soft);
  border-radius: 24px;
  color: var(--text);
  padding: 32px;
  box-shadow: 0 24px 60px rgba(0, 0, 0, 0.5);
}

.reveal h3 {
  font-size: 1.3rem;
  font-weight: 700;
  text-align: center;
  margin-bottom: 6px;
}

.reveal .form-subtitle {
  text-align: center;
  color: var(--text-sub);
  font-size: 0.85rem;
  margin-bottom: 24px;
}

.reveal .close-button {
  color: var(--text-sub);
  right: 18px;
  top: 14px;
  width: 34px;
  height: 34px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.04);
  font-size: 1rem;
  line-height: 1;
}

.reveal .close-button:hover {
  color: #fff;
  background: rgba(255, 255, 255, 0.1);
}

.form-field {
  margin-bottom: 16px;
}

.form-field label {
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--text-sub);
  display: block;
  margin-bottom: 6px;
}

.form-field input,
.form-field textarea {
  width: 100%;
  height: 46px;
  background: #100D18;
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 0 16px;
  color: var(--text);
  font-size: 0.9rem;
  outline: none;
  transition: border-color 0.25s ease, box-shadow 0.25s ease;
}

.form-field textarea {
  height: auto;
  min-height: 80px;
  padding: 12px 16px;
  resize: vertical;
}

.form-field input:focus,
.form-field textarea:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(45, 212, 191, 0.15);
}

.form-field input::placeholder,
.form-field textarea::placeholder {
  color: rgba(184, 178, 196, 0.5);
}

.btn-submit {
  width: 100%;
  padding: 14px 24px;
  border: none;
  border-radius: var(--radius-full);
  background: var(--grad);
  color: #fff;
  font-size: 0.95rem;
  font-weight: 600;
  transition: filter 0.25s ease, transform 0.25s ease;
}

.btn-submit:hover {
  filter: brightness(1.12);
  transform: translateY(-1px);
}

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

.privacy-note {
  display: flex;
  align-items: flex-start;
  gap: 6px;
  font-size: 0.75rem;
  color: var(--text-sub);
  line-height: 1.6;
  margin-top: 16px;
}

.privacy-note i {
  color: var(--accent);
  margin-top: 3px;
}

/* 响应式 */
@media (max-width: 1023px) {
  :root {
    --section-space: 80px;
  }

  .page-hero {
    padding: 150px 0 80px;
    min-height: 560px;
  }

  .split-block {
    gap: 32px;
  }

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

@media (max-width: 768px) {
  .section {
    padding: 64px 0;
  }

  .nav-dock {
    width: calc(100% - 20px);
    border-radius: 20px;
    padding: 8px 10px 8px 14px;
    top: 10px;
  }

  .nav-brand {
    font-size: 0.9rem;
  }

  .brand-badge {
    width: 28px;
    height: 28px;
    font-size: 0.8rem;
  }

  .nav-links {
    display: none;
    position: absolute;
    top: calc(100% + 10px);
    left: 0;
    right: 0;
    background: rgba(13, 10, 20, 0.96);
    border: 1px solid var(--border-soft);
    border-radius: 16px;
    padding: 10px;
    flex-direction: column;
    align-items: stretch;
    gap: 4px;
    margin-left: 0;
    backdrop-filter: blur(14px);
    box-shadow: 0 16px 40px rgba(0, 0, 0, 0.4);
  }

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

  .nav-links a {
    padding: 12px 16px;
    border-radius: 12px;
  }

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

  .btn-nav {
    padding: 8px 14px;
    font-size: 0.8rem;
  }

  .page-hero {
    min-height: 520px;
    padding: 130px 0 64px;
  }

  .hero-inner h1 {
    font-size: clamp(1.8rem, 4.2vw, 2.6rem);
  }

  .hero-inner .hero-desc {
    font-size: 0.95rem;
  }

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

  .hero-actions .btn {
    width: 100%;
    max-width: 320px;
  }

  .hero-meta {
    gap: 14px;
    flex-direction: column;
    align-items: center;
  }

  .split-block {
    flex-direction: column;
    gap: 24px;
  }

  .split-media {
    flex: 0 0 auto;
    width: 100%;
  }

  .split-content {
    padding-left: 0;
  }

  .footer-grid {
    grid-template-columns: 1fr;
    gap: 28px;
  }

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

  .badge-wrap {
    padding: 0 8px;
  }

  .badge-card {
    padding: 26px 14px 22px;
  }
}

@media (max-width: 520px) {
  .container {
    padding: 0 16px;
  }

  .nav-brand span:not(.brand-badge) {
    max-width: 130px;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
  }

  .btn-nav {
    display: none;
  }

  .value-card {
    padding: 24px 20px;
  }

  .split-content h2 {
    font-size: 1.4rem;
  }

  .badge-wrap {
    flex: 0 0 50%;
    max-width: 50%;
  }

  .section-head {
    margin-bottom: 36px;
  }

  .faq-wrap .accordion-title {
    padding: 18px 48px 18px 18px;
    font-size: 0.92rem;
  }

  .accordion-content {
    padding: 0 18px 18px !important;
  }

  .reveal {
    padding: 24px 18px;
  }
}

/* Foundation 覆盖 */
.row {
  max-width: 1200px;
}

a:not(.btn):not(.nav-links a) {
  -webkit-tap-highlight-color: transparent;
}

input:focus,
textarea:focus {
  outline: none;
}

/* roulang page: article */
/* ============ 设计变量 ============ */
:root {
  --bg: #0B0A12;
  --card: #16131E;
  --card-2: #1D1929;
  --border: #262230;
  --border-soft: rgba(255,255,255,0.08);
  --text: #F5F3F7;
  --text-dim: #B8B2C4;
  --brand-1: #7C3AED;
  --brand-2: #C026D3;
  --brand-3: #F43F5E;
  --grad: linear-gradient(135deg, #7C3AED, #C026D3, #F43F5E);
  --accent: #2DD4BF;
  --warn: #F59E0B;
  --radius-lg: 20px;
  --radius-md: 12px;
  --radius-sm: 10px;
  --pill: 999px;
  --transition: all .3s ease;
}

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

html { scroll-behavior: smooth; }

body {
  background: var(--bg);
  color: var(--text);
  font-family: 'PingFang SC','Microsoft YaHei','HarmonyOS Sans SC','Source Han Sans SC',system-ui,-apple-system,sans-serif;
  line-height: 1.8;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  position: relative;
}

body::before {
  content: "";
  position: fixed;
  top: 0; left: 0; right: 0; bottom: 0;
  background-image:
    linear-gradient(rgba(255,255,255,0.018) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,0.018) 1px, transparent 1px);
  background-size: 44px 44px;
  pointer-events: none;
  z-index: 0;
}

img { max-width: 100%; height: auto; border: 0; }
a { color: var(--text-dim); text-decoration: none; transition: var(--transition); }
a:hover { color: var(--accent); }
button { font-family: inherit; cursor: pointer; }
input, select, textarea { font-family: inherit; }

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

/* ============ 容器 ============ */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}
.container.narrow { max-width: 800px; }

/* ============ 按钮 ============ */
.btn-primary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  background: var(--grad);
  color: #fff;
  border: none;
  padding: 12px 28px;
  border-radius: var(--pill);
  font-size: 0.95rem;
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition);
  box-shadow: 0 4px 20px rgba(192,38,211,0.25);
}
.btn-primary:hover {
  filter: brightness(1.1);
  transform: translateY(-2px);
  box-shadow: 0 8px 32px rgba(192,38,211,0.35);
  color: #fff;
}
.btn-primary:active { transform: translateY(-1px) scale(0.98); }

.btn-secondary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  background: transparent;
  border: 1px solid var(--border);
  border-radius: var(--pill);
  color: var(--text);
  padding: 12px 28px;
  font-size: 0.95rem;
  font-weight: 500;
  cursor: pointer;
  transition: var(--transition);
}
.btn-secondary:hover {
  border-color: var(--accent);
  color: var(--accent);
  transform: translateY(-2px);
  background: rgba(45,212,191,0.05);
}

.btn-lg { padding: 16px 42px; font-size: 1.05rem; }
.btn-block { display: flex; width: 100%; justify-content: center; margin-top: 8px; }

/* ============ 导航 Dock ============ */
.nav-dock {
  position: fixed;
  top: 16px;
  left: 50%;
  transform: translateX(-50%);
  width: min(1200px, calc(100% - 32px));
  z-index: 1200;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  padding: 10px 20px;
  background: rgba(13,10,20,0.82);
  -webkit-backdrop-filter: blur(14px);
  backdrop-filter: blur(14px);
  border: 1px solid var(--border-soft);
  border-radius: var(--pill);
  box-shadow: 0 8px 32px rgba(0,0,0,0.3);
  transition: var(--transition);
}
.nav-dock.scrolled {
  background: rgba(13,10,20,0.94);
  box-shadow: 0 14px 48px rgba(0,0,0,0.45);
}

.nav-brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  font-size: 1.05rem;
  color: var(--text);
  white-space: nowrap;
}
.nav-brand:hover { color: var(--text); }

.brand-badge {
  width: 36px;
  height: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--grad);
  border-radius: 12px;
  color: #fff;
  font-size: 0.95rem;
  box-shadow: 0 4px 16px rgba(192,38,211,0.4);
  flex-shrink: 0;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 4px;
}
.nav-links a {
  padding: 8px 18px;
  border-radius: var(--pill);
  font-weight: 500;
  font-size: 0.9rem;
  color: var(--text-dim);
  transition: var(--transition);
  white-space: nowrap;
}
.nav-links a:hover { color: var(--accent); }
.nav-links a.active { background: var(--grad); color: #fff; }

.nav-cta {
  display: flex;
  align-items: center;
  gap: 10px;
}
.btn-nav {
  background: var(--grad);
  color: #fff;
  border: none;
  padding: 8px 22px;
  border-radius: var(--pill);
  font-weight: 600;
  cursor: pointer;
  font-size: 0.9rem;
  transition: var(--transition);
  white-space: nowrap;
}
.btn-nav:hover { filter: brightness(1.1); transform: translateY(-1px); color: #fff; }

.nav-burger {
  display: none;
  background: transparent;
  border: 1px solid var(--border-soft);
  color: var(--text);
  width: 40px;
  height: 40px;
  border-radius: 50%;
  cursor: pointer;
  align-items: center;
  justify-content: center;
  font-size: 1rem;
  transition: var(--transition);
}
.nav-burger:hover { border-color: var(--accent); color: var(--accent); }

/* ============ 文章头部区 ============ */
.article-hero {
  position: relative;
  background: url('/assets/images/backpic/back-2.png') center/cover no-repeat;
  padding: 156px 0 76px;
}
.article-hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(11,10,18,0.76), rgba(11,10,18,0.92) 70%, var(--bg) 100%);
}
.article-hero .container { position: relative; z-index: 2; }

.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  font-size: 0.85rem;
  color: var(--text-dim);
  margin-bottom: 24px;
}
.breadcrumb a { color: var(--accent); font-weight: 500; }
.breadcrumb a:hover { color: #7ee7d8; }
.breadcrumb .sep { color: var(--text-dim); opacity: 0.5; }
.breadcrumb .current { color: var(--text-dim); opacity: 0.8; }

.article-hero h1 {
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 800;
  line-height: 1.28;
  margin: 0 0 20px;
  max-width: 860px;
  color: var(--text);
}
@supports ((-webkit-background-clip: text) or (background-clip: text)) {
  .article-hero h1 {
    color: transparent;
    background: linear-gradient(120deg, #fff 30%, #c4b5fd 100%);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
  }
}

.article-meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 18px;
  margin-top: 20px;
}
.meta-item {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  font-size: 0.85rem;
  color: var(--text-dim);
}
.meta-item i { color: var(--accent); font-size: 0.9rem; }
.meta-tag {
  background: rgba(45,212,191,0.12);
  color: var(--accent);
  border-radius: var(--pill);
  padding: 3px 14px;
  font-size: 0.8rem;
  display: inline-block;
}

/* ============ 正文阅读区 ============ */
.article-body {
  padding: 72px 0 96px;
  position: relative;
  z-index: 1;
}

.article-content {
  color: var(--text);
  font-size: 1rem;
  line-height: 1.9;
}
.article-content h2 {
  font-size: clamp(1.5rem, 2.5vw, 1.9rem);
  font-weight: 700;
  line-height: 1.4;
  margin: 48px 0 20px;
  position: relative;
  padding-left: 18px;
}
.article-content h2::before {
  content: '';
  position: absolute;
  left: 0;
  top: 12%;
  bottom: 12%;
  width: 4px;
  background: var(--grad);
  border-radius: 4px;
}
.article-content h3 {
  font-size: 1.25rem;
  font-weight: 700;
  margin: 36px 0 16px;
  color: #fff;
}
.article-content h4 {
  font-size: 1.05rem;
  font-weight: 600;
  margin: 28px 0 14px;
  color: var(--text);
}
.article-content p { margin-bottom: 1.5em; }
.article-content a {
  color: var(--accent);
  text-decoration: underline;
  text-underline-offset: 4px;
  text-decoration-color: rgba(45,212,191,0.4);
}
.article-content a:hover { color: #7ee7d8; text-decoration-color: #7ee7d8; }

.article-content img {
  border-radius: 16px;
  max-width: 100%;
  height: auto;
  margin: 32px auto;
  display: block;
  border: 1px solid var(--border-soft);
}

.article-content blockquote {
  border-left: 4px solid var(--accent);
  background: rgba(45,212,191,0.06);
  padding: 20px 24px;
  border-radius: 0 12px 12px 0;
  margin: 32px 0;
  color: var(--text-dim);
  font-size: 0.95rem;
}
.article-content blockquote p:last-child { margin-bottom: 0; }

.article-content ul,
.article-content ol { margin: 0 0 1.5em 1.5em; }
.article-content li { margin-bottom: 0.6em; }
.article-content li::marker { color: var(--accent); }

.article-content code {
  background: var(--card-2);
  border: 1px solid var(--border);
  padding: 2px 8px;
  border-radius: 6px;
  font-size: 0.88em;
  color: #f0abfc;
}
.article-content pre {
  background: var(--card-2);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 24px;
  overflow-x: auto;
  margin: 32px 0;
  line-height: 1.7;
}
.article-content pre code {
  background: none;
  border: none;
  padding: 0;
  color: var(--text);
}

.article-content table {
  width: 100%;
  border-collapse: collapse;
  margin: 32px 0;
  background: var(--card);
  border-radius: 12px;
  overflow: hidden;
}
.article-content th,
.article-content td {
  border: 1px solid var(--border);
  padding: 12px 16px;
  text-align: left;
  font-size: 0.92rem;
}
.article-content th {
  background: var(--card-2);
  color: #fff;
  font-weight: 600;
}
.article-content td { color: var(--text-dim); }

/* ============ 标签区 ============ */
.article-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 48px;
  padding-top: 32px;
  border-top: 1px solid var(--border-soft);
}
.article-tags .tag {
  background: rgba(45,212,191,0.1);
  color: var(--accent);
  padding: 5px 16px;
  border-radius: var(--pill);
  font-size: 0.8rem;
  border: 1px solid rgba(45,212,191,0.18);
  transition: var(--transition);
}
.article-tags .tag:hover {
  background: rgba(45,212,191,0.18);
  transform: translateY(-2px);
}

/* ============ 相关推荐 ============ */
.related-section {
  margin-top: 72px;
  padding-top: 48px;
  border-top: 1px solid var(--border-soft);
}
.related-section .section-head {
  text-align: center;
  margin-bottom: 40px;
}
.related-section .section-head h2 {
  font-size: clamp(1.6rem, 3vw, 2.1rem);
  font-weight: 700;
}
.related-section .section-head p {
  color: var(--text-dim);
  margin-top: 8px;
  font-size: 0.95rem;
}

.related-grid { margin-top: 8px; }
.related-grid .columns { margin-bottom: 24px; }

.related-card {
  display: flex;
  flex-direction: column;
  height: 100%;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: var(--transition);
}
.related-card:hover {
  transform: translateY(-6px);
  border-color: rgba(192,38,211,0.5);
  box-shadow: 0 10px 36px rgba(0,0,0,0.35);
}
.related-card .card-img {
  width: 100%;
  height: 160px;
  object-fit: cover;
  display: block;
  border-radius: 0;
  border: none;
  margin: 0;
  transition: transform .5s ease;
}
.related-card:hover .card-img { transform: scale(1.03); }
.related-card .card-body {
  padding: 20px 22px 24px;
  display: flex;
  flex-direction: column;
  flex: 1;
}
.card-tag {
  align-self: flex-start;
  background: rgba(45,212,191,0.12);
  color: var(--accent);
  font-size: 0.75rem;
  font-weight: 600;
  padding: 3px 12px;
  border-radius: var(--pill);
  margin-bottom: 12px;
}
.related-card h3 {
  font-size: 1rem;
  font-weight: 600;
  line-height: 1.5;
  color: var(--text);
  margin-bottom: 10px;
}
.related-card p {
  font-size: 0.85rem;
  color: var(--text-dim);
  line-height: 1.7;
  flex: 1;
  margin-bottom: 0;
}
.card-link {
  color: var(--accent);
  font-size: 0.85rem;
  font-weight: 600;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  margin-top: 16px;
  transition: var(--transition);
}
.card-link i { transition: transform .3s ease; }
.card-link:hover i { transform: translateX(4px); }

/* ============ 返回入口 ============ */
.article-back {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 14px;
  margin-top: 48px;
}

/* ============ 内容未找到 ============ */
.not-found {
  text-align: center;
  padding: 90px 24px;
  background: var(--card);
  border: 1px dashed var(--border);
  border-radius: var(--radius-lg);
}
.not-found i {
  font-size: 3rem;
  color: var(--text-dim);
  margin-bottom: 24px;
}
.not-found h2 {
  font-size: 1.8rem;
  font-weight: 700;
  margin-bottom: 16px;
}
.not-found p { color: var(--text-dim); margin-bottom: 32px; }

/* ============ CTA 区块 ============ */
.cta-block {
  position: relative;
  padding: 96px 0;
  text-align: center;
  background: url('/assets/images/backpic/back-1.png') center/cover no-repeat;
}
.cta-block::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(124,58,237,0.92), rgba(192,38,211,0.86), rgba(244,63,94,0.78));
}
.cta-block .container { position: relative; z-index: 1; }
.cta-block h2 {
  font-size: clamp(1.8rem, 3vw, 2.5rem);
  font-weight: 800;
  color: #fff;
  margin-bottom: 14px;
}
.cta-block p {
  color: rgba(255,255,255,0.85);
  font-size: 1.05rem;
  margin-bottom: 36px;
}

/* ============ 表单弹层 ============ */
.reveal {
  background: var(--card);
  border: 1px solid var(--border-soft);
  border-radius: 24px;
  padding: 36px;
  max-width: 480px;
  color: var(--text);
  box-shadow: 0 24px 80px rgba(0,0,0,0.5);
  overflow: visible;
}
.reveal .modal-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 16px;
  margin-bottom: 24px;
}
.reveal h3 { font-size: 1.4rem; font-weight: 700; margin-bottom: 6px; }
.reveal .sub-desc {
  color: var(--text-dim);
  font-size: 0.875rem;
  line-height: 1.7;
}
.reveal .close-button {
  width: 38px;
  height: 38px;
  border-radius: 50%;
  background: rgba(255,255,255,0.06);
  border: 1px solid var(--border-soft);
  color: var(--text);
  font-size: 1.2rem;
  line-height: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: var(--transition);
  flex-shrink: 0;
}
.reveal .close-button:hover {
  background: rgba(255,255,255,0.12);
  color: #fff;
  transform: rotate(90deg);
}

.form-field { margin-bottom: 18px; }
.form-field label {
  display: block;
  font-size: 0.85rem;
  color: var(--text-dim);
  font-weight: 500;
  margin-bottom: 8px;
}
.form-field input,
.form-field select,
.form-field textarea {
  width: 100%;
  height: 46px;
  background: #100D18;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text);
  padding: 0 16px;
  font-size: 0.9rem;
  transition: var(--transition);
  appearance: none;
}
.form-field select {
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='10' height='6'%3E%3Cpath d='M1 1l4 4 4-4' stroke='%23B8B2C4' stroke-width='1.5' fill='none' stroke-linecap='round'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 16px center;
  padding-right: 40px;
}
.form-field textarea { height: auto; padding: 14px 16px; resize: vertical; }
.form-field input:focus,
.form-field select:focus,
.form-field textarea:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(45,212,191,0.15);
}

.privacy-note {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  font-size: 0.75rem;
  color: var(--text-dim);
  line-height: 1.7;
  margin-bottom: 20px;
  background: rgba(255,255,255,0.03);
  border-radius: 10px;
  padding: 12px 14px;
  border: 1px solid var(--border-soft);
}
.privacy-note i { color: var(--accent); margin-top: 3px; flex-shrink: 0; }

.form-success {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 36px 20px;
  text-align: center;
}
.form-success i { font-size: 2.6rem; color: var(--accent); margin-bottom: 16px; }
.form-success h4 { font-size: 1.1rem; margin-bottom: 8px; }
.form-success p { font-size: 0.85rem; color: var(--text-dim); }

/* ============ 页脚 ============ */
.footer {
  background: #08070D;
  border-top: 1px solid rgba(255,255,255,0.06);
  padding: 64px 0 24px;
  position: relative;
  z-index: 1;
}
.footer::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: var(--grad);
  opacity: 0.5;
}
.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: 48px;
  margin-bottom: 48px;
}
.footer-brand .f-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 1.2rem;
  font-weight: 700;
  margin-bottom: 16px;
  color: var(--text);
}
.footer-brand p {
  color: var(--text-dim);
  font-size: 0.9rem;
  line-height: 1.8;
  max-width: 400px;
}
.footer-col h4 {
  font-size: 0.95rem;
  color: var(--text);
  font-weight: 600;
  margin-bottom: 20px;
}
.footer-col ul { list-style: none; }
.footer-col li { margin-bottom: 12px; }
.footer-col a { color: var(--text-dim); font-size: 0.85rem; }
.footer-col a:hover { color: var(--accent); }
.footer-bottom {
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 8px;
  padding-top: 24px;
  border-top: 1px solid rgba(255,255,255,0.06);
  color: var(--text-dim);
  font-size: 0.8rem;
  opacity: 0.75;
}

/* ============ 响应式 ============ */
@media (max-width: 1024px) {
  .container { padding: 0 20px; }
  .article-hero { padding-top: 142px; }
  .nav-dock { width: calc(100% - 28px); }
}

@media (max-width: 768px) {
  .nav-dock {
    width: calc(100% - 20px);
    border-radius: 20px;
    padding: 10px 14px;
    top: 10px;
  }
  .nav-links {
    display: none;
    position: absolute;
    top: calc(100% + 10px);
    left: 0;
    right: 0;
    background: rgba(13,10,20,0.97);
    border: 1px solid var(--border-soft);
    border-radius: 16px;
    padding: 12px;
    flex-direction: column;
    align-items: stretch;
    gap: 4px;
    box-shadow: 0 16px 48px rgba(0,0,0,0.45);
    -webkit-backdrop-filter: blur(14px);
    backdrop-filter: blur(14px);
  }
  .nav-links.open { display: flex; }
  .nav-links a { padding: 12px 16px; border-radius: 12px; }

  .nav-burger { display: flex; }
  .nav-brand { font-size: 0.95rem; }
  .brand-badge { width: 32px; height: 32px; font-size: 0.85rem; border-radius: 10px; }
  .btn-nav { padding: 8px 16px; font-size: 0.85rem; }

  .article-hero { padding: 128px 0 56px; }
  .article-body { padding: 56px 0 72px; }
  .related-section { margin-top: 48px; }
  .cta-block { padding: 72px 0; }
  .reveal { padding: 28px 24px; }

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

@media (max-width: 480px) {
  .nav-dock { padding: 8px 12px; }
  .nav-brand { font-size: 0.85rem; gap: 8px; }
  .brand-badge { display: none; }
  .nav-cta .btn-nav { padding: 7px 14px; font-size: 0.8rem; }
  .article-hero h1 { font-size: 1.85rem; }
  .article-back { flex-direction: column; align-items: center; }
  .article-back .btn-primary,
  .article-back .btn-secondary { width: 100%; max-width: 300px; }
  .privacy-note { flex-direction: column; }
}

/* roulang page: category2 */
:root {
  --bg: #0B0A12;
  --card: #16131E;
  --card-2: #1D1929;
  --border: rgba(255, 255, 255, 0.08);
  --text: #F5F3F7;
  --text-weak: #B8B2C4;
  --gradient: linear-gradient(135deg, #7C3AED, #C026D3, #F43F5E);
  --accent: #2DD4BF;
  --warn: #F59E0B;
  --radius-sm: 10px;
  --radius-card: 20px;
  --radius-full: 999px;
  --radius-modal: 24px;
  --shadow-1: 0 4px 20px rgba(0, 0, 0, 0.3);
  --shadow-2: 0 8px 32px rgba(0, 0, 0, 0.4);
  --font-family: 'PingFang SC', 'Microsoft YaHei', 'HarmonyOS Sans SC', 'Source Han Sans SC', system-ui, -apple-system, sans-serif;
}
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: var(--font-family);
  background: var(--bg);
  color: var(--text);
  line-height: 1.8;
  font-size: 0.95rem;
  overflow-x: hidden;
}
img { max-width: 100%; display: block; }
a { color: var(--accent); text-decoration: none; transition: color 0.3s ease; }
a:hover { color: #5eead4; }
button { font-family: var(--font-family); cursor: pointer; }
input, select, textarea { font-family: var(--font-family); }
.container { max-width: 1200px; margin: 0 auto; padding: 0 24px; }
.section-pad { padding: 100px 0; }
.section-pad-sm { padding: 60px 0; }

/* 导航 */
.nav-wrapper {
  position: fixed;
  top: 12px;
  left: 0;
  right: 0;
  z-index: 999;
  display: flex;
  justify-content: center;
  padding: 0 16px;
  pointer-events: none;
}
.nav-dock {
  pointer-events: auto;
  width: min(1200px, calc(100% - 32px));
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: rgba(13, 10, 20, 0.82);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border: 1px solid var(--border);
  border-radius: var(--radius-full);
  padding: 10px 20px;
  transition: box-shadow 0.3s ease, background 0.3s ease;
}
.nav-dock.scrolled {
  box-shadow: 0 8px 30px rgba(0, 0, 0, 0.5);
  background: rgba(11, 10, 18, 0.92);
}
.nav-brand {
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--text);
  font-weight: 700;
  font-size: 1.05rem;
  white-space: nowrap;
}
.brand-badge {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: var(--gradient);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-size: 0.9rem;
  flex-shrink: 0;
}
.nav-links {
  display: flex;
  align-items: center;
  gap: 4px;
  margin: 0 auto;
  padding: 0 20px;
}
.nav-links a {
  padding: 8px 18px;
  border-radius: var(--radius-full);
  color: var(--text-weak);
  font-size: 0.9rem;
  font-weight: 500;
  transition: all 0.3s ease;
  white-space: nowrap;
}
.nav-links a:hover { color: var(--accent); background: rgba(255, 255, 255, 0.04); }
.nav-links a.active {
  background: var(--gradient);
  color: #fff;
  font-weight: 600;
}
.btn-nav {
  background: var(--gradient);
  color: #fff;
  border: none;
  border-radius: var(--radius-full);
  padding: 9px 24px;
  font-size: 0.85rem;
  font-weight: 600;
  transition: all 0.3s ease;
  white-space: nowrap;
}
.btn-nav:hover { filter: brightness(1.15); transform: translateY(-2px); }
.btn-nav:active { transform: scale(0.97); }
.nav-burger {
  display: none;
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid var(--border);
  color: var(--text);
  width: 38px;
  height: 38px;
  border-radius: 50%;
  align-items: center;
  justify-content: center;
  font-size: 1rem;
  margin-left: 8px;
}

/* 分类页 Hero */
.cat-hero {
  position: relative;
  padding: 180px 0 100px;
  background: url('/assets/images/backpic/back-1.png') center/cover no-repeat;
  min-height: 540px;
  display: flex;
  align-items: center;
}
.cat-hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(11, 10, 18, 0.75) 0%, rgba(11, 10, 18, 0.85) 100%);
}
.cat-hero .container { position: relative; z-index: 2; }
.cat-hero .cat-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(45, 212, 191, 0.12);
  border: 1px solid rgba(45, 212, 191, 0.3);
  color: var(--accent);
  padding: 6px 16px;
  border-radius: var(--radius-full);
  font-size: 0.85rem;
  font-weight: 600;
  margin-bottom: 20px;
}
.cat-hero h1 {
  font-size: clamp(2.1rem, 5vw, 3.2rem);
  font-weight: 800;
  line-height: 1.3;
  margin-bottom: 20px;
  max-width: 720px;
  letter-spacing: -0.01em;
}
.cat-hero .lead {
  color: var(--text-weak);
  font-size: 1.05rem;
  max-width: 620px;
  margin-bottom: 32px;
}
.cat-hero-actions { display: flex; gap: 16px; flex-wrap: wrap; }

/* 按钮 */
.btn-primary {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: var(--gradient);
  color: #fff !important;
  border: none;
  border-radius: var(--radius-full);
  padding: 12px 30px;
  font-size: 0.9rem;
  font-weight: 600;
  transition: all 0.3s ease;
}
.btn-primary:hover { filter: brightness(1.15); transform: translateY(-2px); color: #fff !important; }
.btn-primary:active { transform: scale(0.97); }
.btn-secondary {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: transparent;
  color: var(--text) !important;
  border: 1px solid rgba(255, 255, 255, 0.2);
  border-radius: var(--radius-full);
  padding: 12px 30px;
  font-size: 0.9rem;
  font-weight: 500;
  transition: all 0.3s ease;
}
.btn-secondary:hover { border-color: var(--accent); color: var(--accent) !important; transform: translateY(-2px); }

/* 图文交错区 */
.section-title-wrap { margin-bottom: 50px; }
.section-title-wrap .eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: var(--accent);
  font-size: 0.8rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin-bottom: 10px;
}
.section-title-wrap h2 {
  font-size: clamp(1.6rem, 3vw, 2.2rem);
  font-weight: 800;
  line-height: 1.35;
  margin-bottom: 14px;
}
.section-title-wrap p.section-desc {
  color: var(--text-weak);
  max-width: 640px;
}
.alt-row {
  display: flex;
  align-items: center;
  gap: 48px;
  margin-bottom: 60px;
}
.alt-row:last-child { margin-bottom: 0; }
.alt-row .alt-image {
  flex: 0 0 45%;
  border-radius: 16px;
  overflow: hidden;
  position: relative;
}
.alt-row .alt-image img {
  width: 100%;
  aspect-ratio: 16/10;
  object-fit: cover;
  border-radius: 16px;
}
.alt-row .alt-image::after {
  content: '';
  position: absolute;
  inset: 0;
  border-radius: 16px;
  border: 1px solid var(--border);
  pointer-events: none;
}
.alt-row .alt-content { flex: 1; }
.alt-row .alt-content .alt-tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: rgba(45, 212, 191, 0.1);
  color: var(--accent);
  font-size: 0.8rem;
  padding: 5px 14px;
  border-radius: var(--radius-full);
  font-weight: 600;
  margin-bottom: 16px;
}
.alt-row .alt-content h3 {
  font-size: 1.4rem;
  font-weight: 700;
  margin-bottom: 16px;
  line-height: 1.4;
}
.alt-row .alt-content p {
  color: var(--text-weak);
  font-size: 0.95rem;
  margin-bottom: 16px;
  line-height: 1.85;
}
.alt-row .alt-points {
  list-style: none;
  padding: 0;
  margin: 0 0 20px;
}
.alt-row .alt-points li {
  padding: 6px 0;
  display: flex;
  align-items: flex-start;
  gap: 10px;
  color: var(--text);
  font-size: 0.9rem;
}
.alt-row .alt-points li i {
  color: var(--accent);
  font-size: 0.8rem;
  margin-top: 6px;
}
/* 图右文左 */
.alt-row.image-right .alt-image { order: 2; }
.alt-row.image-right .alt-content { order: 1; }

/* 安全步骤区 */
.steps-section {
  background: linear-gradient(180deg, transparent, rgba(22, 19, 30, 0.4), transparent);
}
.steps-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  margin-top: 40px;
}
.step-card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius-card);
  padding: 30px 24px;
  position: relative;
  transition: transform 0.3s ease, border-color 0.3s ease, box-shadow 0.3s ease;
}
.step-card:hover {
  transform: translateY(-4px);
  border-color: rgba(45, 212, 191, 0.4);
  box-shadow: var(--shadow-1);
}
.step-num {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: var(--gradient);
  color: #fff;
  font-weight: 700;
  font-size: 1rem;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 16px;
}
.step-card h4 {
  font-size: 1.05rem;
  font-weight: 700;
  margin-bottom: 10px;
}
.step-card p {
  color: var(--text-weak);
  font-size: 0.85rem;
  line-height: 1.7;
}

/* FAQ */
.faq-section { background: rgba(11, 10, 18, 0.6); }
.faq-accordion-wrap {
  max-width: 860px;
  margin: 0 auto;
}
.accordion {
  list-style: none;
  background: transparent !important;
  border: none !important;
}
.accordion-item {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius-card);
  margin-bottom: 14px;
  overflow: hidden;
  transition: border-color 0.3s ease;
}
.accordion-item.is-active { border-color: rgba(45, 212, 191, 0.35); }
.accordion-title {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 20px 24px;
  font-size: 1rem;
  font-weight: 600;
  color: var(--text) !important;
  background: transparent !important;
  border: none !important;
  position: relative;
}
.accordion-title .faq-icon {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  border: 1px solid rgba(255, 255, 255, 0.14);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  font-size: 0.8rem;
  color: var(--accent);
  transition: transform 0.3s ease, background 0.3s ease, color 0.3s ease;
}
.accordion-item.is-active .faq-icon {
  transform: rotate(45deg);
  background: var(--gradient);
  color: #fff;
  border-color: transparent;
}
.accordion-content {
  padding: 0 24px 22px;
  color: var(--text-weak);
  font-size: 0.9rem;
  line-height: 1.8;
  background: transparent !important;
  border: none !important;
}
.accordion-content p { margin: 0; }

/* CTA 区 */
.cta-section {
  position: relative;
  padding: 90px 0;
  background: url('/assets/images/backpic/back-2.png') center/cover no-repeat;
  border-radius: 0;
}
.cta-section::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(124, 58, 237, 0.6), rgba(11, 10, 18, 0.85));
}
.cta-section .container { position: relative; z-index: 2; }
.cta-inner {
  text-align: center;
  max-width: 720px;
  margin: 0 auto;
}
.cta-inner h2 {
  font-size: clamp(1.7rem, 3.5vw, 2.4rem);
  font-weight: 800;
  margin-bottom: 16px;
  line-height: 1.35;
}
.cta-inner p {
  color: var(--text-weak);
  font-size: 1rem;
  margin-bottom: 30px;
}
.cta-inner .cta-actions { display: flex; gap: 16px; justify-content: center; flex-wrap: wrap; }

/* 页脚 */
.footer {
  background: #07060D;
  border-top: 2px solid transparent;
  border-image: var(--gradient) 1;
  padding: 60px 0 24px;
}
.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: 48px;
  margin-bottom: 40px;
}
.footer-brand .f-logo {
  font-size: 1.15rem;
  font-weight: 800;
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 14px;
}
.footer-brand p {
  color: var(--text-weak);
  font-size: 0.85rem;
  max-width: 360px;
  line-height: 1.8;
}
.footer-col h4 {
  font-size: 0.95rem;
  font-weight: 700;
  margin-bottom: 16px;
  color: var(--text);
}
.footer-col ul { list-style: none; padding: 0; margin: 0; }
.footer-col ul li { margin-bottom: 10px; }
.footer-col ul a {
  color: var(--text-weak);
  font-size: 0.85rem;
  transition: color 0.3s ease;
}
.footer-col ul a:hover { color: var(--accent); }
.footer-bottom {
  border-top: 1px solid var(--border);
  padding-top: 20px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 10px;
  color: rgba(184, 178, 196, 0.6);
  font-size: 0.78rem;
}

/* Reveal 弹层 */
.reveal {
  background: var(--card);
  border-radius: var(--radius-modal);
  border: 1px solid var(--border);
  padding: 40px !important;
  max-width: 480px;
  width: calc(100% - 32px);
}
.reveal .close-button {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.08);
  color: var(--text);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.2rem;
  right: 16px;
  top: 16px;
  line-height: 1;
}
.reveal .close-button:hover { background: rgba(255, 255, 255, 0.15); }
.modal-inner h3 {
  font-size: 1.4rem;
  font-weight: 800;
  margin-bottom: 10px;
}
.modal-inner > p {
  color: var(--text-weak);
  font-size: 0.9rem;
  margin-bottom: 24px;
}
.modal-inner form label {
  color: var(--text);
  font-size: 0.85rem;
  font-weight: 600;
  margin-bottom: 8px;
  display: block;
}
.modal-inner form input,
.modal-inner form select {
  width: 100%;
  background: #100D18;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text);
  padding: 12px 16px;
  font-size: 0.9rem;
  margin-bottom: 18px;
  height: auto;
  transition: border-color 0.3s ease, box-shadow 0.3s ease;
}
.modal-inner form input:focus,
.modal-inner form select:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(45, 212, 191, 0.15);
}
.btn-block { width: 100%; justify-content: center; }
.privacy-note {
  display: flex;
  align-items: flex-start;
  gap: 8px;
  color: var(--text-weak);
  font-size: 0.75rem;
  margin-top: 16px;
  line-height: 1.6;
}
.privacy-note i { color: var(--accent); margin-top: 4px; }

/* 返回入口 */
.back-link-row {
  display: flex;
  justify-content: center;
  gap: 12px;
  margin-top: 40px;
}

/* 响应式 */
@media (max-width: 1024px) {
  .section-pad { padding: 80px 0; }
  .cat-hero { padding: 160px 0 80px; }
  .alt-row { gap: 32px; }
  .steps-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 768px) {
  .section-pad { padding: 60px 0; }
  .nav-wrapper { top: 8px; padding: 0 10px; }
  .nav-dock {
    width: calc(100% - 20px);
    border-radius: 20px;
    padding: 8px 14px;
  }
  .nav-links {
    position: fixed;
    top: 70px;
    left: 50%;
    transform: translateX(-50%) translateY(-10px);
    width: calc(100% - 40px);
    background: rgba(13, 10, 20, 0.95);
    backdrop-filter: blur(14px);
    border: 1px solid var(--border);
    border-radius: 20px;
    flex-direction: column;
    padding: 16px;
    gap: 6px;
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
    z-index: 998;
  }
  .nav-links.open {
    opacity: 1;
    visibility: visible;
    transform: translateX(-50%) translateY(0);
  }
  .nav-links a { width: 100%; text-align: center; }
  .nav-burger { display: flex; }
  .btn-nav { display: none; }
  .cat-hero { padding: 140px 0 60px; min-height: auto; }
  .cat-hero h1 { font-size: 1.9rem; }
  .cat-hero .lead { font-size: 0.95rem; }
  .alt-row {
    flex-direction: column;
    gap: 24px;
    margin-bottom: 48px;
  }
  .alt-row .alt-image { flex: 0 0 100%; width: 100%; }
  .alt-row.image-right .alt-image { order: 0; }
  .alt-row.image-right .alt-content { order: 1; }
  .steps-grid { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; gap: 32px; }
  .footer-bottom { flex-direction: column; text-align: center; }
  .cta-section { padding: 60px 0; }
  .reveal { padding: 28px 20px !important; }
  .section-title-wrap { margin-bottom: 36px; }
}
@media (max-width: 520px) {
  .cat-hero-actions { flex-direction: column; align-items: stretch; }
  .btn-primary, .btn-secondary { justify-content: center; }
  .nav-dock { padding: 8px 12px; }
  .nav-brand { font-size: 0.85rem; }
  .brand-badge { width: 32px; height: 32px; font-size: 0.8rem; }
}