/* roulang page: index */
:root {
  --bg-0: #070D1F;
  --bg-1: #0C1934;
  --surface-glass: rgba(18, 38, 64, 0.55);
  --line-1: rgba(46, 218, 230, 0.24);
  --line-2: rgba(242, 166, 90, 0.5);
  --primary: #2DE3E4;
  --primary-strong: #73F2F3;
  --accent: #F2A65A;
  --text-strong: #EAF3FF;
  --text-body: #B9C8E5;
  --text-weak: #7E91B5;
  --radius-card: 18px;
  --radius-btn: 11px;
  --radius-img: 12px;
  --shadow-card: 0 8px 30px rgba(0,0,0,0.35);
  --shadow-hover: 0 12px 40px rgba(45,227,228,0.15);
}
*,*::before,*::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; font-size: 16px; }
body {
  font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
  background: var(--bg-0);
  color: var(--text-body);
  line-height: 1.75;
  overflow-x: hidden;
  min-height: 100vh;
}
img { max-width: 100%; display: block; }
a { color: var(--primary); text-decoration: none; transition: color .2s ease; }
a:hover { color: var(--primary-strong); }
button { font-family: inherit; cursor: pointer; }
input,textarea { font-family: inherit; }
.container { max-width: 80rem; margin: 0 auto; padding-left: 2.5rem; padding-right: 2.5rem; }
@media (max-width: 768px) {
  .container { padding-left: 1.75rem; padding-right: 1.75rem; }
}
@media (max-width: 520px) {
  .container { padding-left: 1rem; padding-right: 1rem; }
}
.section { padding: 7rem 0; position: relative; }
@media (max-width: 768px) {
  .section { padding: 4.5rem 0; }
}
.section-head { max-width: 680px; margin-bottom: 3.5rem; }
.section-eyebrow {
  display: inline-block;
  font-size: .8rem;
  font-weight: 600;
  letter-spacing: .12em;
  color: var(--primary);
  text-transform: uppercase;
  padding: .35rem .9rem;
  border: 1px solid var(--line-1);
  border-radius: 999px;
  background: rgba(45,227,228,0.06);
  margin-bottom: 1.1rem;
}
.section-head h2 {
  font-size: clamp(1.8rem, 3.2vw, 2.4rem);
  font-weight: 700;
  color: var(--text-strong);
  line-height: 1.25;
  letter-spacing: -.01em;
  margin-bottom: .8rem;
}
.section-head p { color: var(--text-body); font-size: 1rem; max-width: 560px; line-height: 1.75; }

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: .5rem;
  font-size: .95rem;
  font-weight: 600;
  padding: .75rem 1.6rem;
  border-radius: var(--radius-btn);
  transition: all .25s ease;
  border: 1px solid transparent;
  line-height: 1.4;
  white-space: nowrap;
}
.btn-primary {
  background: var(--primary);
  color: #071128;
}
.btn-primary:hover {
  background: var(--primary-strong);
  color: #071128;
  box-shadow: 0 0 20px rgba(45,227,228,0.55);
  transform: translateY(-1px);
}
.btn-primary:active { transform: scale(.98); box-shadow: none; }
.btn-ghost {
  background: transparent;
  border-color: var(--primary);
  color: var(--primary);
}
.btn-ghost:hover {
  background: rgba(45,228,230,0.08);
  color: var(--primary-strong);
  border-color: var(--primary-strong);
}
.btn-accent {
  background: transparent;
  border: 1px solid var(--line-2);
  color: var(--accent);
}
.btn-accent:hover { background: rgba(242,166,90,0.08); color: #ffd3a1; border-color: var(--accent); }

/* ---- 顶部信息条 ---- */
.topbar {
  background: #030715;
  height: 36px;
  border-bottom: 1px solid rgba(46,218,230,0.18);
  display: flex;
  align-items: center;
  font-size: .8rem;
}
.topbar-inner { display: flex; justify-content: space-between; align-items: center; width: 100%; }
.topbar-domain { font-family: 'Consolas', 'JetBrains Mono', monospace; color: var(--text-weak); font-size: .78rem; letter-spacing: .03em; }
.topbar-links { display: flex; align-items: center; gap: 1.2rem; }
.topbar-links a { color: var(--text-body); transition: color .2s; }
.topbar-links a:hover { color: var(--primary); }
.topbar-links .sep { width: 1px; height: 12px; background: rgba(255,255,255,0.1); }
@media (max-width: 520px) {
  .topbar-domain { display: none; }
  .topbar-links { margin-left: auto; }
}

/* ---- 主导航 ---- */
.main-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(7,13,31,0.75);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--line-1);
  height: 72px;
}
.nav-inner { height: 72px; display: flex; align-items: center; justify-content: space-between; gap: 1.5rem; }
.brand { display: flex; align-items: center; gap: .7rem; flex-shrink: 0; }
.brand-badge {
  width: 38px; height: 38px;
  border-radius: 10px;
  background: linear-gradient(135deg, rgba(45,227,228,0.2), rgba(242,166,90,0.15));
  border: 1px solid var(--line-1);
  display: flex; align-items: center; justify-content: center;
  font-family: 'Consolas', monospace;
  font-size: .85rem;
  font-weight: 800;
  color: var(--primary);
  letter-spacing: -.02em;
}
.brand-name {
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--text-strong);
  letter-spacing: .01em;
  white-space: nowrap;
}
.main-nav { display: flex; align-items: center; gap: .4rem; }
.nav-link {
  position: relative;
  display: inline-flex;
  align-items: center;
  padding: .6rem 1.05rem;
  font-size: .92rem;
  font-weight: 500;
  color: var(--text-body);
  border-radius: 8px;
  transition: color .2s ease, background .2s ease;
  white-space: nowrap;
}
.nav-link::after {
  content: '';
  position: absolute;
  bottom: 2px;
  left: 50%;
  transform: translateX(-50%);
  width: 0;
  height: 3px;
  border-radius: 3px;
  background: var(--primary);
  transition: width .25s ease;
}
.nav-link:hover { color: var(--text-strong); background: rgba(45,227,228,0.06); }
.nav-link:hover::after,
.nav-link.active::after { width: 60%; }
.nav-link.active { color: var(--primary); }
.nav-cta { margin-left: .5rem; }
.mobile-menu-btn { display: none; background: none; border: 1px solid var(--line-1); color: var(--text-strong); width: 42px; height: 42px; border-radius: 10px; font-size: 1rem; align-items: center; justify-content: center; }
.mobile-menu-btn:hover { background: rgba(45,227,228,0.08); }
@media (max-width: 900px) {
  .main-nav { display: none; }
  .mobile-menu-btn { display: flex; }
  .nav-cta { display: none; }
}
.mobile-drawer {
  position: fixed;
  top: 108px;
  left: 0;
  right: 0;
  background: rgba(7,13,31,0.92);
  backdrop-filter: blur(16px);
  padding: 1.5rem;
  border-bottom: 1px solid var(--line-1);
  z-index: 45;
  display: none;
}
.mobile-drawer.open { display: block; }
.mobile-drawer a {
  display: block;
  padding: .9rem .5rem;
  font-size: 1rem;
  color: var(--text-body);
  border-bottom: 1px solid rgba(46,218,230,0.1);
}
.mobile-drawer a:hover, .mobile-drawer a.active { color: var(--primary); }
.mobile-drawer .btn { margin-top: 1rem; width: 100%; }

/* ---- Hero ---- */
.hero {
  position: relative;
  min-height: 92vh;
  display: flex;
  align-items: center;
  overflow: hidden;
}
.hero-bg {
  position: absolute;
  inset: 0;
  background-size: cover;
  background-position: center;
  z-index: 0;
}
.hero-bg::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(to bottom, rgba(7,13,31,0.82), rgba(7,13,31,0.86) 50%, var(--bg-0) 100%);
}
.hero-content {
  position: relative;
  z-index: 1;
  max-width: 780px;
  padding-top: 5rem;
  padding-bottom: 5rem;
}
.hero-tag {
  display: inline-block;
  font-size: .8rem;
  letter-spacing: .16em;
  color: var(--secondary-text, #d4b6fe);
  padding: .4rem 1.1rem;
  border: 1px solid rgba(212,182,254,0.3);
  border-radius: 999px;
  background: rgba(212,182,254,0.08);
  margin-bottom: 1.6rem;
  text-transform: uppercase;
}
.hero h1 {
  font-size: clamp(2.2rem, 5vw, 3.6rem);
  font-weight: 900;
  line-height: 1.14;
  letter-spacing: -.015em;
  color: var(--text-strong);
  margin-bottom: 1.4rem;
}
.hero h1 .grad {
  background: linear-gradient(90deg, var(--primary), #72f6e8);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.hero-sub {
  font-size: 1.05rem;
  color: var(--text-body);
  max-width: 600px;
  line-height: 1.8;
  margin-bottom: 2.2rem;
}
.hero-ctas { display: flex; gap: 1rem; flex-wrap: wrap; margin-bottom: 3.5rem; }
.hero-stats {
  display: flex;
  gap: 3rem;
  flex-wrap: wrap;
  border-top: 1px solid rgba(46,218,230,0.2);
  padding-top: 1.8rem;
}
.stat { display: flex; flex-direction: column; gap: .2rem; }
.stat-num {
  font-family: 'Consolas', 'JetBrains Mono', monospace;
  font-size: 1.9rem;
  font-weight: 800;
  color: var(--accent);
  letter-spacing: -.02em;
}
.stat-label { font-size: .82rem; color: var(--text-weak); }

/* ---- 通用卡片 ---- */
.glass-card {
  background: var(--surface-glass);
  border: 1px solid var(--line-1);
  border-radius: var(--radius-card);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  box-shadow: var(--shadow-card);
  transition: transform .25s ease, box-shadow .25s ease, border-color .25s ease;
}
.glass-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-hover);
  border-color: rgba(46,218,230,0.5);
}

/* ---- 卖点区 ---- */
.feature-band { display: flex; flex-direction: column; gap: 2rem; }
.feature-row { display: flex; align-items: center; gap: 4rem; }
.feature-row.reverse { flex-direction: row-reverse; }
.feature-text { flex: 1; }
.feature-text .feature-icon {
  width: 52px; height: 52px;
  border-radius: 14px;
  display: flex; align-items: center; justify-content: center;
  font-size: 1.3rem;
  background: rgba(45,227,228,0.1);
  border: 1px solid var(--line-1);
  color: var(--primary);
  margin-bottom: 1.1rem;
}
.feature-text h3 { font-size: 1.4rem; font-weight: 700; color: var(--text-strong); margin-bottom: .7rem; }
.feature-text p { color: var(--text-body); font-size: .95rem; line-height: 1.75; }
.feature-more { display: inline-flex; align-items: center; gap: .5rem; margin-top: 1rem; font-size: .9rem; color: var(--primary); font-weight: 600; }
.feature-more:hover { color: var(--primary-strong); }
.feature-visual {
  flex: 1;
  border-radius: 20px;
  overflow: hidden;
  position: relative;
  border: 1px solid var(--line-1);
  box-shadow: var(--shadow-card);
  min-height: 240px;
  background: var(--bg-1);
}
.feature-visual img { width: 100%; height: 100%; object-fit: cover; min-height: 240px; }
.feature-visual::before {
  content: '';
  position: absolute;
  inset: 0;
  border-radius: 20px;
  box-shadow: inset 0 0 0 1px rgba(255,255,255,0.04);
  pointer-events: none;
  z-index: 1;
}
@media (max-width: 768px) {
  .feature-row, .feature-row.reverse { flex-direction: column; gap: 2rem; }
  .feature-visual { min-height: 200px; width: 100%; }
}

/* ---- 演示区 ---- */
.showcase-section { background: var(--bg-1); }
.showcase-block {
  display: flex;
  align-items: center;
  gap: 4rem;
  padding: 3rem 0;
}
.showcase-block.reverse { flex-direction: row-reverse; }
.showcase-media { flex: 1.1; }
.showcase-text { flex: .9; }
.showcase-text h3 { font-size: 1.7rem; font-weight: 700; color: var(--text-strong); margin: .8rem 0 .8rem; }
.showcase-text p { color: var(--text-body); line-height: 1.8; font-size: .95rem; }
.browser-frame {
  border-radius: 16px;
  border: 1px solid var(--line-1);
  background: #0a1429;
  box-shadow: 0 20px 60px rgba(0,0,0,0.45);
  overflow: hidden;
}
.browser-bar {
  height: 38px;
  background: rgba(12,25,52,0.9);
  border-bottom: 1px solid rgba(46,218,230,0.15);
  display: flex;
  align-items: center;
  padding: 0 1rem;
  gap: .45rem;
}
.browser-dot { width: 10px; height: 10px; border-radius: 50%; }
.browser-dot:nth-child(1) { background: rgba(242,166,90,0.7); }
.browser-dot:nth-child(2) { background: rgba(242,166,90,0.4); }
.browser-dot:nth-child(3) { background: rgba(46,218,230,0.5); }
.browser-url {
  margin-left: .8rem;
  font-family: 'Consolas', monospace;
  font-size: .72rem;
  color: var(--text-weak);
  background: rgba(255,255,255,0.05);
  padding: .2rem .7rem;
  border-radius: 6px;
}
.browser-frame img { width: 100%; object-fit: cover; }
@media (max-width: 768px) {
  .showcase-block, .showcase-block.reverse { flex-direction: column; gap: 2rem; padding: 2rem 0; }
}

/* ---- 证据区 ---- */
.proof-section {
  background: var(--bg-0);
  position: relative;
  overflow: hidden;
}
.proof-section::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image: linear-gradient(rgba(46,218,230,0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(46,218,230,0.04) 1px, transparent 1px);
  background-size: 60px 60px;
  pointer-events: none;
}
.proof-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1.5rem;
  position: relative;
  z-index: 1;
}
@media (max-width: 900px) {
  .proof-grid { grid-template-columns: repeat(2, 1fr); }
}
.proof-card {
  padding: 2.2rem 1.5rem;
  text-align: center;
  background: rgba(18,38,64,0.35);
  border: 1px solid rgba(46,218,230,0.12);
  border-radius: 18px;
  transition: border-color .25s;
}
.proof-card:hover { border-color: var(--line-2); }
.proof-num {
  font-family: 'Consolas', 'JetBrains Mono', monospace;
  font-size: 2.4rem;
  font-weight: 800;
  color: var(--accent);
  letter-spacing: -.02em;
  line-height: 1.1;
}
.proof-label { margin-top: .6rem; font-size: .9rem; color: var(--text-body); }

/* ---- 价格区 ---- */
.pricing-section { background: var(--bg-1); }
.pricing-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.8rem;
  align-items: center;
}
@media (max-width: 900px) {
  .pricing-grid { grid-template-columns: 1fr; max-width: 460px; margin: 0 auto; }
}
.price-card {
  background: rgba(18,38,64,0.55);
  border: 1px solid var(--line-1);
  border-radius: 22px;
  padding: 2.4rem 2rem;
  position: relative;
  transition: transform .25s, box-shadow .25s;
}
.price-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-hover); }
.price-card.recommended {
  border-color: var(--line-2);
  background: rgba(18,38,64,0.65);
  transform: scale(1.03);
  box-shadow: 0 15px 50px rgba(242,166,90,0.1);
}
.price-card.recommended:hover { transform: scale(1.03) translateY(-4px); }
.price-recommend-tag {
  position: absolute;
  top: -13px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--accent);
  color: #2a1705;
  font-size: .75rem;
  font-weight: 800;
  padding: .25rem 1rem;
  border-radius: 999px;
  letter-spacing: .06em;
}
.price-name { font-size: 1.05rem; font-weight: 600; color: var(--text-strong); margin-bottom: .4rem; }
.price-desc { font-size: .85rem; color: var(--text-weak); margin-bottom: 1.6rem; }
.price-amount {
  font-family: 'Consolas', monospace;
  font-size: 2.2rem;
  font-weight: 800;
  color: var(--primary);
  line-height: 1.1;
}
.price-amount small { font-size: .8rem; font-weight: 400; color: var(--text-weak); margin-left: .2rem; }
.price-features { list-style: none; margin: 1.6rem 0 2rem; display: flex; flex-direction: column; gap: .65rem; }
.price-features li { display: flex; align-items: center; gap: .6rem; font-size: .9rem; color: var(--text-body); }
.price-features li i { color: var(--primary); font-size: .85rem; width: 16px; }

/* ---- FAQ ---- */
.faq-section { background: var(--bg-0); }
.faq-layout {
  display: grid;
  grid-template-columns: 1.4fr .9fr;
  gap: 3.5rem;
  align-items: start;
}
@media (max-width: 900px) {
  .faq-layout { grid-template-columns: 1fr; gap: 2.5rem; }
}
.faq-list { display: flex; flex-direction: column; }
.faq-item {
  border-bottom: 1px solid rgba(46,218,230,0.1);
  padding: 1.2rem 0;
}
.faq-q {
  display: flex;
  align-items: flex-start;
  gap: .9rem;
  cursor: pointer;
  user-select: none;
}
.faq-q .q-mark {
  font-size: 1.05rem;
  font-weight: 800;
  color: var(--primary);
  background: rgba(45,227,228,0.1);
  width: 30px;
  height: 30px;
  border-radius: 8px;
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
}
.faq-q .q-text { font-size: 1rem; font-weight: 600; color: var(--text-strong); flex: 1; line-height: 1.5; }
.faq-q .q-toggle { color: var(--text-weak); font-size: 1rem; transition: transform .25s; margin-top: .15rem; }
.faq-item.open .q-toggle { transform: rotate(45deg); color: var(--primary); }
.faq-a {
  max-height: 0;
  overflow: hidden;
  transition: max-height .25s ease, padding .25s ease;
  padding: 0 1rem 0 3.9rem;
  color: var(--text-body);
  font-size: .9rem;
  line-height: 1.75;
}
.faq-item.open .faq-a { max-height: 500px; padding-top: .7rem; padding-bottom: .5rem; }
.faq-side {
  background: var(--surface-glass);
  border: 1px solid var(--line-1);
  border-radius: 20px;
  padding: 2rem;
  backdrop-filter: blur(14px);
  position: sticky;
  top: 100px;
}
.faq-side h3 { font-size: 1.2rem; color: var(--text-strong); margin-bottom: .6rem; }
.faq-side p { font-size: .88rem; color: var(--text-weak); margin-bottom: 1.5rem; }
.contact-form { display: flex; flex-direction: column; gap: .9rem; }
.contact-form input,
.contact-form textarea {
  background: rgba(18,38,64,0.5);
  border: 1px solid var(--line-1);
  border-radius: 10px;
  padding: .8rem 1rem;
  color: var(--text-strong);
  font-size: .9rem;
  transition: border-color .2s, box-shadow .2s;
}
.contact-form input:focus,
.contact-form textarea:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(45,227,228,0.2);
}
.contact-form textarea { resize: vertical; min-height: 90px; }
.contact-form input::placeholder,
.contact-form textarea::placeholder { color: var(--text-weak); }
.contact-tips {
  margin-top: 1.2rem;
  font-size: .78rem;
  color: var(--text-weak);
  display: flex;
  align-items: center;
  gap: .5rem;
}
.contact-tips i { color: var(--accent); }

/* ---- 最新信息 ---- */
.latest-section { background: var(--bg-1); }
.latest-head { display: flex; justify-content: space-between; align-items: flex-end; margin-bottom: 2.5rem; flex-wrap: wrap; gap: 1rem; }
.latest-head .more-link { font-size: .9rem; color: var(--primary); }
.news-list { display: flex; flex-direction: column; gap: 1.1rem; }
.news-card {
  display: flex;
  align-items: center;
  gap: 1.8rem;
  background: rgba(18,38,64,0.45);
  border: 1px solid rgba(46,218,230,0.1);
  border-radius: 16px;
  padding: 1.5rem 1.8rem;
  transition: transform .25s, border-color .25s, box-shadow .25s;
  position: relative;
}
@media (max-width: 600px) {
  .news-card { flex-direction: column; align-items: flex-start; gap: .8rem; }
}
.news-card:hover {
  transform: translateY(-4px);
  border-color: rgba(46,218,230,0.5);
  box-shadow: var(--shadow-hover);
}
.news-meta {
  flex-shrink: 0;
  width: 130px;
  display: flex;
  flex-direction: column;
  gap: .3rem;
}
@media (max-width: 600px) {
  .news-meta { width: auto; }
}
.news-cat {
  font-size: .72rem;
  font-weight: 600;
  color: var(--accent);
  background: rgba(242,166,90,0.1);
  padding: .2rem .7rem;
  border-radius: 999px;
  align-self: flex-start;
  letter-spacing: .04em;
}
.news-date {
  font-family: 'Consolas', monospace;
  font-size: .78rem;
  color: var(--text-weak);
}
.news-body { flex: 1; min-width: 0; }
.news-body h3 {
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--text-strong);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  margin-bottom: .3rem;
}
@media (max-width: 600px) {
  .news-body h3 { white-space: normal; }
}
.news-body p {
  font-size: .86rem;
  color: var(--text-body);
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  line-height: 1.65;
}
.news-arrow { color: var(--text-weak); font-size: 1rem; transition: color .2s, transform .2s; flex-shrink: 0; }
.news-card:hover .news-arrow { color: var(--primary); transform: translateX(3px); }
.empty-state {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  height: 160px;
  background: rgba(18,38,64,0.3);
  border: 1px dashed var(--line-1);
  border-radius: 16px;
  color: var(--text-weak);
  font-size: .9rem;
}
.empty-state i { font-size: 1.6rem; margin-bottom: .6rem; color: rgba(46,218,230,0.4); }

/* ---- 底部CTA ---- */
.cta-section {
  position: relative;
  padding: 7rem 0;
  text-align: center;
  overflow: hidden;
}
.cta-bg {
  position: absolute;
  inset: 0;
  background-size: cover;
  background-position: center;
  z-index: 0;
}
.cta-bg::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(7,13,31,0.92), rgba(7,13,31,0.88));
}
.cta-content { position: relative; z-index: 1; max-width: 640px; margin: 0 auto; }
.cta-content h2 {
  font-size: clamp(1.8rem, 3.5vw, 2.6rem);
  font-weight: 700;
  color: var(--text-strong);
  line-height: 1.3;
  margin-bottom: 1.2rem;
  letter-spacing: -.01em;
}
.cta-content p { color: var(--text-body); font-size: 1rem; margin-bottom: 2rem; line-height: 1.8; }

/* ---- 页脚 ---- */
.footer {
  background: #050a18;
  border-top: 1px solid var(--line-1);
  padding-top: 4rem;
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr 1.2fr;
  gap: 2.5rem;
  padding-bottom: 3rem;
  border-bottom: 1px solid rgba(255,255,255,0.05);
}
@media (max-width: 900px) {
  .footer-grid { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 520px) {
  .footer-grid { grid-template-columns: 1fr; }
}
.footer-brand .brand { margin-bottom: 1rem; }
.footer-brand p { font-size: .88rem; color: var(--text-weak); max-width: 260px; line-height: 1.7; }
.footer h4 {
  font-size: .95rem;
  color: var(--text-strong);
  font-weight: 700;
  margin-bottom: 1.2rem;
  letter-spacing: .02em;
}
.footer-links { list-style: none; display: flex; flex-direction: column; gap: .55rem; }
.footer-links a { color: var(--text-weak); font-size: .88rem; transition: color .2s; }
.footer-links a:hover { color: var(--primary); }
.footer-contact { list-style: none; display: flex; flex-direction: column; gap: .7rem; }
.footer-contact li { display: flex; align-items: center; gap: .7rem; font-size: .88rem; color: var(--text-weak); }
.footer-contact li i { color: var(--primary); width: 16px; text-align: center; }
.footer-bottom {
  padding: 1.5rem 0;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: .8rem;
  font-size: .8rem;
  color: var(--text-weak);
}
.footer-bottom .domain { font-family: 'Consolas', monospace; letter-spacing: .03em; }

/* ---- 浮动CTA ---- */
.floating-cta-desktop {
  position: fixed;
  right: 28px;
  bottom: 28px;
  z-index: 60;
  display: flex;
  flex-direction: column-reverse;
  align-items: center;
  gap: .8rem;
}
.fab-main {
  width: 60px;
  height: 60px;
  border-radius: 50%;
  background: var(--primary);
  border: none;
  color: #071128;
  font-size: 1.4rem;
  box-shadow: 0 8px 30px rgba(45,227,228,0.4);
  transition: transform .2s, box-shadow .2s;
  position: relative;
  z-index: 2;
}
.fab-main:hover { transform: scale(1.06); box-shadow: 0 10px 40px rgba(45,227,228,0.55); }
.fab-menu {
  display: flex;
  flex-direction: column;
  gap: .5rem;
  opacity: 0;
  pointer-events: none;
  transform: translateY(10px);
  transition: opacity .25s, transform .25s;
}
.floating-cta-desktop:hover .fab-menu,
.floating-cta-desktop.active .fab-menu { opacity: 1; pointer-events: auto; transform: translateY(0); }
.fab-menu a {
  width: 46px; height: 46px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(18,38,64,0.9);
  border: 1px solid var(--line-1);
  color: var(--primary);
  font-size: 1rem;
  text-decoration: none;
  transition: all .2s;
}
.fab-menu a:hover { background: var(--primary); color: #071128; }
@media (max-width: 900px) {
  .floating-cta-desktop { display: none; }
}
.mobile-bottom-cta {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  z-index: 60;
  padding: .8rem 1rem;
  background: rgba(7,13,31,0.92);
  backdrop-filter: blur(14px);
  border-top: 1px solid var(--line-1);
  display: none;
  transform: translateY(0);
  transition: transform .3s ease;
}
.mobile-bottom-cta.hidden-cta { transform: translateY(100%); }
.mobile-bottom-cta .btn { width: 100%; }
@media (max-width: 900px) {
  .mobile-bottom-cta { display: block; }
  body { padding-bottom: 70px; }
}
@media (max-width: 900px) {
  .hero { min-height: 80vh; }
  .hero h1 { font-size: clamp(1.9rem, 8vw, 2.6rem); }
}

/* ---- 背景纹理装饰 ---- */
.bg-grid-overlay::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image: linear-gradient(rgba(46,218,230,0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(46,218,230,0.03) 1px, transparent 1px);
  background-size: 50px 50px;
  pointer-events: none;
}

/* ---- 焦点可见性 ---- */
a:focus-visible, button:focus-visible, input:focus-visible, textarea:focus-visible {
  outline: 2px solid var(--primary);
  outline-offset: 2px;
  border-radius: 4px;
}

/* ---- 标题微调 ---- */
.text-gradient {
  background: linear-gradient(90deg, var(--primary), #72f6e8);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
::selection { background: rgba(45,227,228,0.3); color: var(--text-strong); }

/* roulang page: category1 */
/* ========== Design Tokens ========== */
:root {
  --bg-0: #070D1F;
  --bg-1: #0C1934;
  --surface-glass: rgba(18, 38, 64, 0.55);
  --line-1: rgba(46, 218, 230, 0.24);
  --line-2: rgba(242, 166, 90, 0.5);
  --primary: #2DE3E4;
  --primary-strong: #73F2F3;
  --accent: #F2A65A;
  --text-strong: #EAF3FF;
  --text-body: #B9C8E5;
  --text-weak: #7E91B5;
  --font-sans: -apple-system, PingFang SC, Microsoft YaHei, Noto Sans SC, sans-serif;
  --font-mono: "JetBrains Mono", Consolas, monospace;
  --radius-card: 18px;
  --radius-btn: 12px;
  --radius-input: 10px;
  --shadow-card: 0 8px 30px rgba(0, 0, 0, 0.35);
  --shadow-hover: 0 12px 40px rgba(45, 227, 228, 0.15);
}

/* ========== Reset ========== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: var(--font-sans);
  background: var(--bg-0);
  color: var(--text-body);
  line-height: 1.75;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; display: block; }
a { color: var(--primary); text-decoration: none; transition: color .2s ease; }
a:hover { color: var(--primary-strong); }
button { font-family: inherit; cursor: pointer; border: none; background: none; }
input, textarea { font-family: inherit; font-size: 14px; }
ul, ol { list-style: none; }

.container {
  width: min(80rem, 100% - 3rem);
  margin-inline: auto;
}

/* ========== Topbar ========== */
.topbar {
  background: #050A17;
  border-bottom: 1px solid rgba(46, 218, 230, 0.15);
  height: 36px;
  display: flex;
  align-items: center;
  position: relative;
  z-index: 50;
}
.topbar-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: min(80rem, 100% - 3rem);
  margin-inline: auto;
}
.topbar-domain {
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--text-weak);
  letter-spacing: .04em;
}
.topbar-actions { display: flex; align-items: center; gap: 14px; }
.topbar-link {
  font-size: 13px;
  color: var(--text-body);
  display: inline-flex;
  align-items: center;
  gap: 6px;
}
.topbar-link i { color: var(--primary); font-size: 12px; }
.topbar-link:hover { color: var(--primary); }
.topbar-divider { width: 1px; height: 14px; background: rgba(255,255,255,.12); }

/* ========== Header / Nav ========== */
.header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(7, 13, 31, 0.85);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid rgba(46, 218, 230, 0.2);
  height: 72px;
  display: flex;
  align-items: center;
  transition: box-shadow .2s ease;
}
.header.scrolled { box-shadow: 0 4px 30px rgba(0,0,0,.4); }
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: min(80rem, 100% - 3rem);
  margin-inline: auto;
  gap: 24px;
}
.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
}
.brand-badge {
  width: 36px;
  height: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, rgba(45,227,228,.2), rgba(45,227,228,.05));
  border: 1px solid rgba(46,218,230,.4);
  border-radius: 10px;
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 14px;
  color: var(--primary);
  letter-spacing: .02em;
}
.brand-name {
  font-size: 18px;
  font-weight: 700;
  color: var(--text-strong);
  letter-spacing: .01em;
  white-space: nowrap;
}
.brand-name:hover { color: var(--primary-strong); }

.main-nav { display: flex; align-items: center; gap: 6px; }
.nav-link {
  position: relative;
  padding: 10px 16px;
  font-size: 15px;
  font-weight: 500;
  color: var(--text-body);
  border-radius: 8px;
  transition: color .2s ease, background .2s ease;
}
.nav-link:hover { color: var(--primary); background: rgba(45,227,228,.05); }
.nav-link.active {
  color: var(--primary);
  font-weight: 600;
}
.nav-link.active::after {
  content: "";
  position: absolute;
  bottom: 2px;
  left: 50%;
  transform: translateX(-50%);
  width: 18px;
  height: 3px;
  border-radius: 3px;
  background: var(--primary);
  box-shadow: 0 0 8px rgba(45,227,228,.5);
}

.header-cta {
  margin-left: auto;
  flex-shrink: 0;
}
.nav-toggle {
  display: none;
  font-size: 20px;
  color: var(--text-strong);
  padding: 8px;
  border-radius: 8px;
  border: 1px solid rgba(255,255,255,.12);
  background: rgba(255,255,255,.03);
}

/* ========== Buttons ========== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-size: 15px;
  font-weight: 600;
  padding: 12px 28px;
  border-radius: var(--radius-btn);
  transition: all .22s ease;
  text-align: center;
}
.btn-primary {
  background: var(--primary);
  color: #06121F;
  border: 1px solid transparent;
}
.btn-primary:hover {
  background: var(--primary-strong);
  color: #06121F;
  box-shadow: 0 0 20px rgba(45,227,228,.55);
  transform: translateY(-1px);
}
.btn-primary:active {
  transform: scale(.98);
  box-shadow: none;
}
.btn-ghost {
  background: transparent;
  color: var(--primary);
  border: 1px solid rgba(46,218,230,.5);
}
.btn-ghost:hover {
  background: rgba(45,228,230,.08);
  border-color: var(--primary);
  color: var(--primary-strong);
}
.btn-ghost:active { transform: scale(.98); }
.btn-sm { padding: 9px 20px; font-size: 14px; }
.btn-lg { padding: 16px 40px; font-size: 16px; }

/* ========== Category Hero ========== */
.category-hero {
  position: relative;
  min-height: 480px;
  display: flex;
  align-items: center;
  background-image: url('/assets/images/backpic/back-1.png');
  background-size: cover;
  background-position: center;
  padding: 100px 0 80px;
}
.category-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(7,13,31,.82) 0%, rgba(7,13,31,.72) 50%, var(--bg-0) 100%);
}
.category-hero::after {
  content: "";
  position: absolute;
  inset: 0;
  background-image: linear-gradient(rgba(45,227,228,.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(45,227,228,.03) 1px, transparent 1px);
  background-size: 48px 48px;
  pointer-events: none;
}
.category-hero .container {
  position: relative;
  z-index: 2;
}
.breadcrumb {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  color: var(--text-weak);
  margin-bottom: 20px;
  font-family: var(--font-mono);
}
.breadcrumb a { color: var(--text-weak); }
.breadcrumb a:hover { color: var(--primary); }
.breadcrumb .sep { color: rgba(255,255,255,.3); }
.category-hero h1 {
  font-size: 2.9rem;
  font-weight: 900;
  color: var(--text-strong);
  letter-spacing: -0.01em;
  line-height: 1.18;
  margin-bottom: 16px;
  max-width: 760px;
}
.category-hero .lead {
  font-size: 17px;
  color: var(--text-body);
  max-width: 620px;
  line-height: 1.75;
  margin-bottom: 28px;
}
.hero-actions { display: flex; gap: 14px; flex-wrap: wrap; }

/* ========== Section Base ========== */
.section { padding: 96px 0; }
.section-alt { background: var(--bg-1); position: relative; }
.section-dark { background: #050A17; }
.section-header {
  max-width: 680px;
  margin-bottom: 56px;
}
.section-tag {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--primary);
  font-family: var(--font-mono);
  margin-bottom: 12px;
}
.section-tag::before {
  content: "";
  width: 20px;
  height: 1px;
  background: var(--primary);
}
.section-title {
  font-size: 30px;
  font-weight: 700;
  color: var(--text-strong);
  letter-spacing: -0.01em;
  line-height: 1.3;
  margin-bottom: 14px;
}
.section-desc {
  font-size: 16px;
  color: var(--text-body);
  line-height: 1.75;
}

/* ========== Split Feature ========== */
.split-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items: center;
  margin-bottom: 88px;
}
.split-grid:last-child { margin-bottom: 0; }
.split-grid.reverse .split-media { order: 2; }
.split-grid.reverse .split-content { order: 1; }
.split-media {
  position: relative;
  border-radius: 16px;
  overflow: hidden;
  border: 1px solid rgba(46,218,230,.2);
  box-shadow: var(--shadow-card);
}
.split-media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  aspect-ratio: 16 / 11;
}
.split-media::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, transparent 55%, rgba(7,13,31,.65) 100%);
  pointer-events: none;
}
.media-badge {
  position: absolute;
  bottom: 16px;
  left: 16px;
  z-index: 2;
  background: rgba(7,13,31,.75);
  border: 1px solid rgba(46,218,230,.35);
  border-radius: 999px;
  padding: 6px 14px;
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--primary);
  letter-spacing: .04em;
  backdrop-filter: blur(8px);
}
.split-content h3 {
  font-size: 24px;
  font-weight: 700;
  color: var(--text-strong);
  margin-bottom: 14px;
  line-height: 1.3;
}
.split-content p {
  font-size: 15px;
  color: var(--text-body);
  line-height: 1.8;
  margin-bottom: 20px;
}
.split-points { margin-top: 16px; }
.split-points li {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  font-size: 14px;
  color: var(--text-body);
  margin-bottom: 10px;
  line-height: 1.6;
}
.split-points li i {
  color: var(--primary);
  font-size: 14px;
  margin-top: 3px;
}

/* ========== Timeline / Scenarios ========== */
.timeline {
  position: relative;
  max-width: 780px;
  margin: 0 auto;
  padding-left: 40px;
}
.timeline::before {
  content: "";
  position: absolute;
  left: 14px;
  top: 0;
  bottom: 0;
  width: 2px;
  background: linear-gradient(180deg, rgba(46,218,230,.5), rgba(46,218,230,.08));
}
.timeline-item {
  position: relative;
  margin-bottom: 48px;
  padding: 28px 32px;
  background: var(--surface-glass);
  border: 1px solid var(--line-1);
  border-radius: var(--radius-card);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  box-shadow: var(--shadow-card);
  transition: transform .2s ease, border-color .2s ease, box-shadow .2s ease;
}
.timeline-item:last-child { margin-bottom: 0; }
.timeline-item:hover {
  transform: translateY(-4px);
  border-color: var(--primary);
  box-shadow: var(--shadow-hover);
}
.timeline-item::before {
  content: "";
  position: absolute;
  left: -36px;
  top: 34px;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--bg-0);
  border: 3px solid var(--primary);
  box-shadow: 0 0 0 4px rgba(45,227,228,.15);
}
.timeline-num {
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 700;
  color: var(--accent);
  letter-spacing: .05em;
  margin-bottom: 6px;
}
.timeline-item h3 {
  font-size: 20px;
  font-weight: 600;
  color: var(--text-strong);
  margin-bottom: 8px;
}
.timeline-item p {
  font-size: 14px;
  color: var(--text-body);
  line-height: 1.7;
}
.timeline-tags { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 14px; }
.timeline-tags span {
  display: inline-block;
  font-size: 12px;
  padding: 4px 12px;
  border-radius: 999px;
  background: rgba(45,227,228,.08);
  border: 1px solid rgba(46,218,230,.25);
  color: #c9f4f5;
}

/* ========== Process / Steps ========== */
.process-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}
.process-item {
  position: relative;
  padding: 32px 24px 28px;
  background: var(--surface-glass);
  border: 1px solid var(--line-1);
  border-radius: var(--radius-card);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  box-shadow: var(--shadow-card);
  transition: transform .22s ease, border-color .22s ease, box-shadow .22s ease;
}
.process-item:hover {
  transform: translateY(-6px);
  border-color: var(--line-2);
  box-shadow: var(--shadow-hover);
}
.process-step {
  font-family: var(--font-mono);
  font-size: 14px;
  font-weight: 700;
  color: var(--accent);
  margin-bottom: 14px;
  display: inline-flex;
  align-items: center;
  gap: 8px;
}
.process-step::before {
  content: "";
  width: 6px;
  height: 6px;
  background: var(--accent);
  border-radius: 50%;
  display: inline-block;
}
.process-item h3 {
  font-size: 18px;
  font-weight: 600;
  color: var(--text-strong);
  margin-bottom: 10px;
}
.process-item p {
  font-size: 14px;
  color: var(--text-body);
  line-height: 1.7;
}

/* ========== FAQ Section ========== */
.faq-wrap {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 56px;
  align-items: start;
}
.faq-list {
  border-top: 1px solid rgba(255,255,255,.1);
}
.faq-item {
  border-bottom: 1px solid rgba(255,255,255,.1);
}
.faq-q {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 22px 0;
  cursor: pointer;
  width: 100%;
  text-align: left;
  font-size: 16px;
  font-weight: 600;
  color: var(--text-strong);
  transition: color .2s ease;
}
.faq-q:hover { color: var(--primary); }
.faq-q .q-badge {
  flex-shrink: 0;
  width: 28px;
  height: 28px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(45,227,228,.1);
  border: 1px solid rgba(46,218,230,.3);
  border-radius: 8px;
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 700;
  color: var(--primary);
}
.faq-a {
  max-height: 0;
  overflow: hidden;
  transition: max-height .25s ease, padding .25s ease;
  padding-left: 42px;
  padding-right: 20px;
}
.faq-item.active .faq-a {
  max-height: 300px;
  padding-bottom: 20px;
}
.faq-a p {
  font-size: 14px;
  color: var(--text-body);
  line-height: 1.75;
}
.faq-icon { margin-left: auto; font-size: 14px; color: var(--text-weak); transition: transform .25s ease; }
.faq-item.active .faq-icon { transform: rotate(45deg); color: var(--primary); }

.faq-side {
  padding: 36px 32px;
  background: var(--surface-glass);
  border: 1px solid var(--line-1);
  border-radius: var(--radius-card);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  box-shadow: var(--shadow-card);
}
.faq-side h3 {
  font-size: 20px;
  font-weight: 700;
  color: var(--text-strong);
  margin-bottom: 8px;
}
.faq-side > p {
  font-size: 14px;
  color: var(--text-body);
  margin-bottom: 24px;
}
.form-group { margin-bottom: 16px; }
.form-group label {
  display: block;
  font-size: 13px;
  color: var(--text-weak);
  margin-bottom: 6px;
  font-weight: 500;
}
.form-control {
  width: 100%;
  padding: 12px 14px;
  background: rgba(18,38,64,.5);
  border: 1px solid var(--line-1);
  border-radius: var(--radius-input);
  color: var(--text-strong);
  font-size: 14px;
  transition: border-color .2s ease, box-shadow .2s ease;
}
.form-control::placeholder { color: rgba(126,145,181,.5); }
.form-control:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(45,227,228,.2);
}
textarea.form-control { min-height: 90px; resize: vertical; }
.form-submit { width: 100%; margin-top: 8px; }
.form-tip {
  font-size: 12px;
  color: var(--text-weak);
  text-align: center;
  margin-top: 14px;
}

/* ========== CTA Section ========== */
.cta-section {
  position: relative;
  padding: 110px 0;
  background-image: url('/assets/images/backpic/back-2.png');
  background-size: cover;
  background-position: center;
  text-align: center;
}
.cta-section::before {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(7,13,31,.82), rgba(10,20,40,.9));
}
.cta-section .container { position: relative; z-index: 2; }
.cta-title {
  font-size: 32px;
  font-weight: 800;
  color: var(--text-strong);
  letter-spacing: -0.01em;
  margin-bottom: 14px;
  line-height: 1.3;
}
.cta-desc {
  font-size: 16px;
  color: var(--text-body);
  max-width: 560px;
  margin: 0 auto 32px;
  line-height: 1.75;
}
.cta-actions {
  display: flex;
  justify-content: center;
  gap: 16px;
  flex-wrap: wrap;
}
.cta-tip {
  font-size: 13px;
  color: var(--text-weak);
  margin-top: 20px;
  font-family: var(--font-mono);
}

/* ========== Footer ========== */
.footer {
  background: #050A17;
  border-top: 1px solid rgba(46,218,230,.25);
  padding: 68px 0 0;
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr 1.2fr;
  gap: 40px;
  padding-bottom: 44px;
}
.footer-brand .brand { margin-bottom: 14px; }
.footer-brand p {
  font-size: 14px;
  color: var(--text-weak);
  line-height: 1.7;
  max-width: 280px;
}
.footer h4 {
  font-size: 15px;
  font-weight: 600;
  color: var(--text-strong);
  margin-bottom: 16px;
  letter-spacing: .02em;
}
.footer-links li { margin-bottom: 10px; }
.footer-links a {
  font-size: 14px;
  color: var(--text-body);
  transition: color .2s ease;
}
.footer-links a:hover { color: var(--primary); }
.footer-contact li {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 14px;
  color: var(--text-body);
  margin-bottom: 12px;
}
.footer-contact i {
  color: var(--primary);
  font-size: 13px;
  width: 16px;
  text-align: center;
}
.footer-bottom {
  border-top: 1px solid rgba(255,255,255,.08);
  padding: 22px 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 8px;
}
.footer-bottom span {
  font-size: 13px;
  color: var(--text-weak);
}
.footer-bottom .domain {
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--text-weak);
}

/* ========== Floating CTA ========== */
.float-cta {
  position: fixed;
  right: 28px;
  bottom: 28px;
  z-index: 200;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 12px;
}
.float-main {
  width: 64px;
  height: 64px;
  border-radius: 50%;
  background: var(--primary);
  color: #06121F;
  font-size: 22px;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 8px 30px rgba(45,227,228,.4);
  transition: transform .2s ease, background .2s ease, box-shadow .2s ease;
}
.float-main:hover {
  transform: scale(1.06);
  background: var(--primary-strong);
  box-shadow: 0 10px 36px rgba(45,227,228,.55);
}
.float-menu {
  position: absolute;
  bottom: 76px;
  right: 0;
  display: flex;
  flex-direction: column;
  gap: 8px;
  opacity: 0;
  pointer-events: none;
  transform: translateY(10px);
  transition: opacity .22s ease, transform .22s ease;
}
.float-cta.open .float-menu {
  opacity: 1;
  pointer-events: auto;
  transform: translateY(0);
}
.float-menu a {
  display: flex;
  align-items: center;
  gap: 8px;
  background: var(--bg-1);
  border: 1px solid rgba(46,218,230,.3);
  color: var(--text-strong);
  padding: 10px 16px;
  border-radius: 999px;
  font-size: 13px;
  white-space: nowrap;
  box-shadow: var(--shadow-card);
  transition: border-color .2s ease, color .2s ease;
}
.float-menu a:hover { border-color: var(--primary); color: var(--primary); }

/* ========== Mobile Responsive ========== */
@media (max-width: 1024px) {
  .process-grid { grid-template-columns: repeat(2, 1fr); gap: 18px; }
  .footer-grid { grid-template-columns: 1fr 1fr; gap: 32px; }
  .split-grid { gap: 40px; }
}

@media (max-width: 768px) {
  .section { padding: 68px 0; }
  .category-hero { min-height: 420px; padding: 80px 0 60px; }
  .category-hero h1 { font-size: 2.1rem; }
  .split-grid { grid-template-columns: 1fr; gap: 36px; }
  .split-grid.reverse .split-media { order: 1; }
  .split-grid.reverse .split-content { order: 2; }
  .split-media img { aspect-ratio: 16 / 10; }
  .process-grid { grid-template-columns: 1fr; gap: 16px; }
  .faq-wrap { grid-template-columns: 1fr; gap: 36px; }
  .footer-grid { grid-template-columns: 1fr; gap: 28px; }
  .header-cta { display: none; }
  .nav-toggle { display: block; }
  .main-nav {
    display: none;
    position: absolute;
    top: 72px;
    left: 0;
    right: 0;
    background: rgba(7,13,31,.97);
    flex-direction: column;
    padding: 20px;
    gap: 6px;
    border-bottom: 1px solid rgba(46,218,230,.2);
    backdrop-filter: blur(16px);
  }
  .main-nav.open { display: flex; }
  .nav-link { width: 100%; padding: 12px 16px; }
  .nav-link.active::after { display: none; }
  .nav-link.active { background: rgba(45,227,228,.08); border-radius: 8px; }
  .float-cta { right: 16px; bottom: 16px; }
  .float-main { width: 56px; height: 56px; font-size: 18px; }
  .cta-title { font-size: 26px; }
  .timeline { padding-left: 28px; }
  .timeline-item { padding: 22px 20px; }
  .category-hero .lead { font-size: 15px; }
}

@media (max-width: 520px) {
  .container { width: min(80rem, 100% - 2rem); }
  .topbar-domain { font-size: 12px; }
  .topbar-link span { display: none; }
  .brand-name { font-size: 16px; }
  .category-hero h1 { font-size: 1.8rem; }
  .section-title { font-size: 24px; }
  .process-grid { grid-template-columns: 1fr; }
  .faq-side { padding: 24px 20px; }
  .hero-actions .btn { width: 100%; }
  .footer-bottom { flex-direction: column; text-align: center; }
}

/* roulang page: article */
:root {
  --bg-0: #070D1F;
  --bg-1: #0C1934;
  --surface-glass: rgba(18, 38, 64, 0.55);
  --line-1: rgba(46, 218, 230, 0.24);
  --line-2: rgba(242, 166, 90, 0.5);
  --primary: #2DE3E4;
  --primary-strong: #73F2F3;
  --accent: #F2A65A;
  --text-strong: #EAF3FF;
  --text-body: #B9C8E5;
  --text-weak: #7E91B5;
  --radius-card: 18px;
  --radius-btn: 10px;
  --shadow-card: 0 8px 30px rgba(0, 0, 0, 0.35);
  --shadow-hover: 0 12px 40px rgba(45, 227, 228, 0.15);
}

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

html {
  scroll-behavior: smooth;
}

body {
  background-color: var(--bg-0);
  background-image: linear-gradient(rgba(45, 227, 228, 0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(45, 227, 228, 0.03) 1px, transparent 1px);
  background-size: 44px 44px;
  color: var(--text-body);
  font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
  font-size: 16px;
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
}

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

a {
  color: var(--primary);
  transition: color .2s;
}

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

.container {
  width: 100%;
  max-width: 80rem;
  margin-inline: auto;
  padding-inline: 1rem;
}

@media (min-width: 768px) {
  .container {
    padding-inline: 1.75rem;
  }
}

@media (min-width: 1024px) {
  .container {
    padding-inline: 2.5rem;
  }
}

/* ===== 顶部信息条 ===== */
.top-info {
  position: relative;
  background: #05080F;
  border-bottom: 1px solid rgba(46, 218, 230, 0.1);
}

.top-info::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: -1px;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(45, 227, 228, 0.7), transparent);
}

.top-info-inner {
  height: 36px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.domain-text {
  font-family: Consolas, "JetBrains Mono", monospace;
  font-size: .75rem;
  color: var(--text-weak);
  letter-spacing: .08em;
}

.top-actions {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.top-actions a {
  font-size: .75rem;
  color: var(--text-body);
  text-decoration: none;
  transition: color .2s;
}

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

/* ===== 主导航 ===== */
.main-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(7, 13, 31, 0.78);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--line-1);
}

.main-header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
  gap: 2rem;
}

.brand {
  display: flex;
  align-items: center;
  gap: .65rem;
  text-decoration: none;
  flex-shrink: 0;
}

.brand-badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 34px;
  height: 34px;
  border-radius: 9px;
  background: linear-gradient(135deg, rgba(45, 227, 228, 0.18), rgba(45, 227, 228, 0.04));
  border: 1px solid rgba(45, 227, 228, 0.35);
  color: var(--primary);
  font-family: Consolas, monospace;
  font-size: .8rem;
  font-weight: 700;
}

.brand-name {
  font-size: 1.08rem;
  font-weight: 700;
  color: var(--text-strong);
  letter-spacing: .01em;
  white-space: nowrap;
}

.main-nav {
  display: flex;
  align-items: center;
  gap: 1.75rem;
}

.main-nav .nav-link {
  position: relative;
  color: var(--text-body);
  font-size: .95rem;
  text-decoration: none;
  padding: .35rem 0;
  transition: color .2s;
}

.main-nav .nav-link::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -2px;
  width: 100%;
  height: 3px;
  border-radius: 3px;
  background: var(--primary);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform .25s;
}

.main-nav .nav-link:hover {
  color: var(--text-strong);
}

.main-nav .nav-link:hover::after,
.main-nav .nav-link.active::after {
  transform: scaleX(1);
}

.main-nav .nav-link.active {
  color: var(--text-strong);
}

.nav-cta {
  margin-left: .75rem;
}

.nav-toggle {
  display: none;
  background: none;
  border: 1px solid var(--line-1);
  border-radius: 8px;
  width: 42px;
  height: 38px;
  cursor: pointer;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 5px;
  padding: 0;
}

.nav-toggle span {
  display: block;
  width: 20px;
  height: 2px;
  background: var(--text-strong);
  border-radius: 2px;
  transition: all .3s;
}

.nav-toggle.active span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.nav-toggle.active span:nth-child(2) {
  opacity: 0;
}

.nav-toggle.active span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

@media (max-width: 920px) {
  .nav-toggle {
    display: flex;
  }

  .main-nav {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: rgba(7, 13, 31, 0.96);
    border-bottom: 1px solid var(--line-1);
    flex-direction: column;
    align-items: stretch;
    padding: 1rem 1.5rem 1.5rem;
    gap: .25rem;
    display: none;
  }

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

  .main-nav .nav-link {
    padding: .8rem 0;
    font-size: 1rem;
    border-bottom: 1px solid rgba(126, 145, 181, 0.1);
  }

  .nav-cta {
    margin: 1rem 0 0;
    width: 100%;
  }

  .nav-cta .btn {
    width: 100%;
  }
}

/* ===== 按钮 ===== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: .4rem;
  padding: .65rem 1.25rem;
  border-radius: var(--radius-btn);
  font-size: .95rem;
  font-weight: 600;
  text-decoration: none;
  border: 1px solid transparent;
  cursor: pointer;
  transition: all .22s ease;
  white-space: nowrap;
}

.btn-primary {
  background: var(--primary);
  color: #06222A;
}

.btn-primary:hover {
  background: var(--primary-strong);
  box-shadow: 0 0 20px rgba(45, 227, 228, 0.55);
  transform: translateY(-1px);
}

.btn-primary:active {
  transform: scale(0.98);
  box-shadow: none;
}

.btn-ghost {
  background: transparent;
  color: var(--primary);
  border-color: rgba(45, 227, 228, 0.45);
}

.btn-ghost:hover {
  background: rgba(45, 227, 228, 0.08);
  border-color: var(--primary);
}

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

/* ===== 文章 Hero 区 ===== */
.article-hero {
  position: relative;
  padding: 3.5rem 0 2.75rem;
  background:
    linear-gradient(180deg, rgba(7, 13, 31, 0.88), rgba(7, 13, 31, 0.78)),
    url("/assets/images/backpic/back-2.png") center / cover no-repeat;
  border-bottom: 1px solid var(--line-1);
}

.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: .5rem;
  font-size: .85rem;
  color: var(--text-weak);
  margin-bottom: 1.5rem;
}

.breadcrumb a {
  color: var(--text-body);
  text-decoration: none;
}

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

.category-badge {
  display: inline-block;
  padding: .3rem .9rem;
  border-radius: 999px;
  background: rgba(242, 166, 90, 0.12);
  border: 1px solid rgba(242, 166, 90, 0.35);
  color: var(--accent);
  font-size: .8rem;
  font-weight: 600;
}

.article-header h1 {
  font-size: clamp(1.85rem, 4vw, 2.75rem);
  line-height: 1.28;
  font-weight: 800;
  color: var(--text-strong);
  letter-spacing: -0.01em;
  margin: .85rem 0 1.15rem;
  max-width: 48rem;
}

.article-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 1.25rem;
  align-items: center;
  font-size: .85rem;
  color: var(--text-weak);
}

.article-meta i {
  color: var(--primary);
  width: 1.1rem;
  margin-right: .25rem;
}

/* ===== 正文区 ===== */
.article-wrap {
  padding: 3rem 0 4rem;
  background-image: linear-gradient(rgba(45, 227, 228, 0.02) 1px, transparent 1px),
    linear-gradient(90deg, rgba(45, 227, 228, 0.02) 1px, transparent 1px);
  background-size: 40px 40px;
}

.article-layout {
  max-width: 46rem;
  margin: 0 auto;
}

.article-content {
  font-size: 1.02rem;
  line-height: 1.85;
  color: var(--text-body);
}

.article-content h2 {
  font-size: 1.55rem;
  font-weight: 700;
  color: var(--text-strong);
  margin: 2.5rem 0 1rem;
  padding-left: .8rem;
  border-left: 3px solid var(--primary);
  line-height: 1.4;
}

.article-content h3 {
  font-size: 1.2rem;
  font-weight: 600;
  color: var(--text-strong);
  margin: 2rem 0 .75rem;
}

.article-content p {
  margin-bottom: 1.25rem;
}

.article-content a {
  color: var(--primary);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.article-content a:hover {
  color: var(--primary-strong);
}

.article-content ul,
.article-content ol {
  margin: 0 0 1.4rem;
  padding-left: 1.5rem;
}

.article-content li {
  margin-bottom: .5rem;
}

.article-content blockquote {
  border-left: 3px solid var(--accent);
  background: rgba(242, 166, 90, 0.06);
  padding: .9rem 1.2rem;
  margin: 1.5rem 0;
  border-radius: 0 8px 8px 0;
  color: var(--text-strong);
}

.article-content img {
  border-radius: 12px;
  border: 1px solid var(--line-1);
  max-width: 100%;
  height: auto;
  margin: 1.75rem auto;
}

.article-content table {
  width: 100%;
  border-collapse: collapse;
  margin: 1.5rem 0;
  font-size: .95rem;
}

.article-content th,
.article-content td {
  border: 1px solid var(--line-1);
  padding: .6rem .9rem;
  text-align: left;
}

.article-content th {
  background: rgba(45, 227, 228, 0.08);
  color: var(--text-strong);
}

.article-tags {
  margin-top: 2.5rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--line-1);
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: .5rem;
  font-size: .88rem;
  color: var(--text-weak);
}

.article-tags .tag {
  padding: .25rem .75rem;
  border-radius: 999px;
  background: rgba(45, 227, 228, 0.08);
  border: 1px solid rgba(45, 227, 228, 0.2);
  color: var(--primary);
}

/* ===== 相关推荐 ===== */
.related-section {
  margin-top: 3rem;
  padding-top: 2.5rem;
  border-top: 1px solid var(--line-1);
}

.related-title {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--text-strong);
  margin-bottom: 1.25rem;
}

.related-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1rem;
}

@media (min-width: 640px) {
  .related-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 1024px) {
  .related-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

.related-card {
  display: flex;
  flex-direction: column;
  background: var(--surface-glass);
  border: 1px solid var(--line-1);
  border-radius: var(--radius-card);
  overflow: hidden;
  text-decoration: none;
  box-shadow: var(--shadow-card);
  transition: transform .25s, border-color .25s, box-shadow .25s;
}

.related-card:hover {
  transform: translateY(-4px);
  border-color: rgba(45, 227, 228, 0.55);
  box-shadow: var(--shadow-hover);
}

.related-img {
  aspect-ratio: 16 / 9;
  object-fit: cover;
  width: 100%;
  border-bottom: 1px solid var(--line-1);
}

.related-body {
  padding: 1rem 1.15rem 1.25rem;
}

.related-body h3 {
  font-size: .98rem;
  font-weight: 600;
  color: var(--text-strong);
  line-height: 1.5;
  margin-bottom: .45rem;
}

.related-body p {
  font-size: .85rem;
  color: var(--text-weak);
  line-height: 1.55;
}

/* ===== 上一篇/下一篇 ===== */
.article-pager {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  margin-top: 2rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--line-1);
}

.article-pager a {
  font-size: .9rem;
  color: var(--text-body);
  text-decoration: none;
  padding: .55rem 1rem;
  border: 1px solid var(--line-1);
  border-radius: var(--radius-btn);
  transition: all .2s;
}

.article-pager a:hover {
  color: var(--primary);
  border-color: var(--primary);
}

/* ===== 内容未找到 ===== */
.not-found {
  text-align: center;
  padding: 3rem 1rem;
  background: var(--surface-glass);
  border: 1px solid var(--line-1);
  border-radius: var(--radius-card);
}

.not-found-icon {
  font-size: 2.5rem;
  color: var(--accent);
  margin-bottom: 1rem;
}

.not-found h2 {
  font-size: 1.4rem;
  color: var(--text-strong);
  margin-bottom: .5rem;
}

.not-found p {
  color: var(--text-weak);
  margin-bottom: 1.5rem;
}

/* ===== 底部 CTA ===== */
.article-cta {
  position: relative;
  padding: 4rem 0;
  background:
    linear-gradient(180deg, rgba(7, 13, 31, 0.9), rgba(12, 25, 52, 0.92)),
    url("/assets/images/backpic/back-1.png") center / cover;
  border-top: 1px solid var(--line-1);
  border-bottom: 1px solid var(--line-1);
  text-align: center;
}

.article-cta h2 {
  font-size: 1.8rem;
  color: var(--text-strong);
  font-weight: 700;
  margin-bottom: .75rem;
}

.article-cta p {
  color: var(--text-body);
  max-width: 30rem;
  margin: 0 auto 1.5rem;
}

/* ===== 页脚 ===== */
.footer {
  background: var(--bg-1);
  border-top: 1px solid rgba(45, 227, 228, 0.3);
  padding: 4rem 0 1.5rem;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 2.25rem;
  padding-bottom: 2.5rem;
  border-bottom: 1px solid rgba(126, 145, 181, 0.15);
}

@media (min-width: 768px) {
  .footer-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 1024px) {
  .footer-grid {
    grid-template-columns: 1.4fr 1fr 1fr 1.2fr;
  }
}

.footer h4 {
  font-size: .9rem;
  font-weight: 700;
  color: var(--text-strong);
  margin-bottom: 1rem;
  letter-spacing: .04em;
}

.footer-links {
  list-style: none;
  padding: 0;
  margin: 0;
}

.footer-links li {
  margin-bottom: .5rem;
}

.footer-links a {
  color: var(--text-body);
  text-decoration: none;
  font-size: .9rem;
  transition: color .2s;
}

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

.footer-contact {
  list-style: none;
  padding: 0;
  margin: 0;
  font-size: .9rem;
  color: var(--text-body);
  line-height: 1.9;
}

.footer-contact i {
  color: var(--primary);
  width: 1.2rem;
  margin-right: .35rem;
}

.footer-brand p {
  color: var(--text-weak);
  font-size: .9rem;
  max-width: 24rem;
  line-height: 1.7;
  margin: .9rem 0 0;
}

.footer-bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: .75rem;
  padding-top: 1.5rem;
  font-size: .82rem;
  color: var(--text-weak);
  font-family: Consolas, "JetBrains Mono", monospace;
}

/* ===== 浮动 CTA ===== */
.float-cta {
  position: fixed;
  right: 1.5rem;
  bottom: 1.5rem;
  z-index: 90;
  transition: opacity .3s, transform .3s;
}

.float-main {
  width: 64px;
  height: 64px;
  border-radius: 50%;
  background: var(--primary);
  color: #06222A;
  border: none;
  font-size: 1.5rem;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 8px 30px rgba(45, 227, 228, 0.35);
  transition: all .25s;
}

.float-main:hover {
  background: var(--primary-strong);
  transform: scale(1.05);
}

.float-menu {
  position: absolute;
  right: 0;
  bottom: 72px;
  display: flex;
  flex-direction: column;
  gap: .5rem;
  opacity: 0;
  transform: translateY(8px);
  pointer-events: none;
  transition: all .25s;
}

.float-menu.open {
  opacity: 1;
  transform: translateY(0);
  pointer-events: auto;
}

.float-menu a {
  white-space: nowrap;
  background: var(--surface-glass);
  border: 1px solid var(--line-1);
  border-radius: 999px;
  padding: .45rem .95rem;
  color: var(--text-strong);
  font-size: .85rem;
  text-decoration: none;
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  transition: all .2s;
}

.float-menu a:hover {
  border-color: var(--primary);
  color: var(--primary);
}

.mobile-cta-bar {
  display: none;
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  z-index: 90;
  height: 54px;
  align-items: center;
  justify-content: center;
  background: rgba(7, 13, 31, 0.92);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-top: 1px solid var(--line-1);
  transform: translateY(100%);
  transition: transform .3s;
}

.mobile-cta-bar.show {
  transform: translateY(0);
}

.mobile-cta-bar a {
  display: flex;
  width: 90%;
  height: 40px;
  align-items: center;
  justify-content: center;
  background: var(--primary);
  color: #06222A;
  border-radius: 10px;
  font-weight: 700;
  font-size: .95rem;
  text-decoration: none;
}

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

  .mobile-cta-bar {
    display: flex;
  }

  .article-wrap {
    padding: 2rem 0 3rem;
  }

  .article-hero {
    padding: 2.5rem 0 2rem;
  }

  .article-pager {
    flex-direction: column;
    align-items: stretch;
  }

  .article-pager a {
    text-align: center;
  }
}

/* roulang page: category2 */
:root {
  --bg-0: #0B101F;
  --bg-1: #151B2D;
  --surface-glass: rgba(20, 30, 52, 0.68);
  --line-1: rgba(46, 218, 230, 0.24);
  --line-2: rgba(242, 166, 90, 0.5);
  --primary: #2DE3E4;
  --primary-strong: #73F2F3;
  --accent: #F2A65A;
  --text-strong: #EAF3FF;
  --text-body: #B9C8E5;
  --text-weak: #7E91B5;
  --radius-card: 18px;
  --radius-btn: 8px;
  --shadow-card: 0 8px 30px rgba(0,0,0,0.35);
  --font-mono: 'JetBrains Mono', 'Consolas', monospace;
}
* { margin:0; padding:0; box-sizing:border-box; }
html { scroll-behavior:smooth; }
body {
  background: var(--bg-0);
  color: var(--text-body);
  font-family: -apple-system, 'PingFang SC', 'Microsoft YaHei', 'Noto Sans SC', sans-serif;
  font-size: 16px;
  line-height: 1.75;
  overflow-x: hidden;
}
body::before {
  content: '';
  position: fixed;
  inset: 0;
  background-image: linear-gradient(rgba(45,227,228,0.025) 1px, transparent 1px), linear-gradient(90deg, rgba(45,227,228,0.025) 1px, transparent 1px);
  background-size: 48px 48px;
  pointer-events: none;
  z-index: 0;
}
a { color: var(--primary); text-decoration: none; transition: color 0.25s; }
a:hover { color: var(--primary-strong); }
img { max-width: 100%; display: block; }
.container { max-width: 80rem; margin: 0 auto; padding: 0 2.5rem; position: relative; z-index: 1; }
section { position: relative; z-index: 1; }

/* Topbar */
.topbar {
  background: #050A16;
  height: 36px;
  display: flex;
  align-items: center;
  border-bottom: 1px solid rgba(45,227,228,0.12);
  font-size: 13px;
}
.topbar .container { display: flex; justify-content: space-between; align-items: center; width: 100%; }
.topbar-domain { font-family: var(--font-mono); color: var(--text-weak); letter-spacing: 0.02em; }
.topbar-actions a { color: var(--text-body); margin-left: 20px; font-size: 13px; }
.topbar-actions a:hover { color: var(--primary); }
.topbar-actions i { margin-right: 4px; color: var(--accent); }

/* Main Nav */
.main-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(7,13,31,0.82);
  backdrop-filter: blur(14px);
  border-bottom: 1px solid rgba(46,218,230,0.18);
  height: 72px;
}
.main-header .container { display: flex; align-items: center; justify-content: space-between; height: 100%; }
.brand { display: flex; align-items: center; gap: 10px; }
.brand-badge {
  width: 34px; height: 34px;
  background: linear-gradient(135deg, var(--primary) 0%, #1E6E8A 100%);
  border-radius: 8px;
  display: flex; align-items: center; justify-content: center;
  font-family: var(--font-mono);
  font-weight: 800;
  font-size: 13px;
  color: #071022;
  letter-spacing: 0.02em;
}
.brand-name { font-size: 19px; font-weight: 800; color: var(--text-strong); letter-spacing: 0.01em; }
.main-nav { display: flex; gap: 28px; }
.nav-link { font-size: 15px; color: var(--text-body); font-weight: 500; position: relative; padding: 26px 0; }
.nav-link::after {
  content: '';
  position: absolute;
  left: 0; bottom: 14px;
  width: 0; height: 3px;
  background: var(--primary);
  border-radius: 2px;
  transition: width 0.3s;
}
.nav-link:hover { color: var(--text-strong); }
.nav-link:hover::after { width: 100%; }
.nav-link.active { color: var(--text-strong); }
.nav-link.active::after { width: 100%; }
.nav-cta {
  background: var(--primary);
  color: #071022;
  padding: 8px 18px;
  border-radius: var(--radius-btn);
  font-weight: 700;
  font-size: 14px;
  transition: all 0.25s;
}
.nav-cta:hover { background: var(--primary-strong); color: #071022; box-shadow: 0 0 20px rgba(45,227,228,0.55); transform: none; }

/* Category Hero */
.cat-hero {
  background-size: cover;
  background-position: center;
  padding: 100px 0 80px;
  border-bottom: 1px solid rgba(46,218,230,0.2);
  position: relative;
}
.cat-hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(7,13,31,0.88) 0%, rgba(7,13,31,0.72) 50%, rgba(7,13,31,0.94) 100%);
  z-index: 0;
}
.cat-hero .container { position: relative; z-index: 2; display: flex; align-items: center; gap: 60px; }
.cat-hero-content { max-width: 640px; }
.cat-hero h1 {
  font-size: 38px;
  font-weight: 900;
  color: var(--text-strong);
  line-height: 1.25;
  letter-spacing: -0.01em;
  margin-bottom: 14px;
}
.cat-hero h1 .highlight {
  background: linear-gradient(90deg, var(--primary), #A8F0F1);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.cat-hero p.desc {
  font-size: 16px;
  color: var(--text-body);
  margin-bottom: 26px;
  max-width: 520px;
  line-height: 1.8;
}
.cat-ctas { display: flex; gap: 14px; }
.btn-primary {
  background: var(--primary);
  color: #071022;
  padding: 10px 26px;
  border-radius: var(--radius-btn);
  font-weight: 700;
  font-size: 14px;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  transition: all 0.25s;
  border: none;
  cursor: pointer;
}
.btn-primary:hover { background: var(--primary-strong); color: #071022; box-shadow: 0 0 20px rgba(45,227,228,0.55); }
.btn-primary:active { transform: scale(0.98); }
.btn-ghost {
  background: transparent;
  border: 1px solid var(--primary);
  color: var(--primary);
  padding: 10px 26px;
  border-radius: var(--radius-btn);
  font-weight: 600;
  font-size: 14px;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  transition: all 0.25s;
  cursor: pointer;
}
.btn-ghost:hover { background: rgba(45,228,230,0.08); color: var(--primary); }
.cat-hero-side {
  flex-shrink: 0;
  width: 400px;
  border: 1px solid var(--line-1);
  border-radius: 16px;
  overflow: hidden;
  box-shadow: var(--shadow-card);
  background: var(--surface-glass);
  backdrop-filter: blur(14px);
}
.cat-hero-side img { width: 100%; height: 250px; object-fit: cover; }
.cat-hero-side .side-meta {
  padding: 16px 16px 20px;
}
.side-meta span {
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--accent);
  display: block;
  margin-bottom: 8px;
}

/* Section Titles */
.section-label {
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--primary);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  margin-bottom: 8px;
}
.section-title {
  font-size: 30px;
  font-weight: 800;
  color: var(--text-strong);
  line-height: 1.35;
  margin-bottom: 14px;
  letter-spacing: -0.01em;
}
.section-sub {
  font-size: 16px;
  color: var(--text-body);
  max-width: 640px;
  margin-bottom: 48px;
  line-height: 1.8;
}

/* Intro Timeline */
.intro-section { padding: 96px 0; }
.timeline-wrap { display: flex; flex-direction: column; gap: 0; }
.timeline-item {
  display: flex;
  gap: 32px;
  padding: 36px 0;
  border-bottom: 1px solid rgba(46,218,230,0.14);
  position: relative;
}
.timeline-item:last-child { border-bottom: none; }
.timeline-num {
  font-family: var(--font-mono);
  font-size: 34px;
  font-weight: 800;
  color: var(--accent);
  line-height: 1;
  min-width: 66px;
  opacity: 0.9;
}
.timeline-content { flex: 1; }
.timeline-content h3 { font-size: 20px; font-weight: 700; color: var(--text-strong); margin-bottom: 10px; }
.timeline-content p { font-size: 15px; color: var(--text-body); line-height: 1.8; max-width: 640px; }
.timeline-tag {
  display: inline-block;
  background: rgba(242,166,90,0.12);
  color: var(--accent);
  border-radius: 999px;
  padding: 2px 14px;
  font-size: 12px;
  font-weight: 600;
  margin-right: 8px;
  margin-top: 10px;
  border: 1px solid rgba(242,166,90,0.25);
}

/* Feature Grid (打破等宽) */
.feature-section { padding: 96px 0; background: rgba(12,25,52,0.5); border-top: 1px solid rgba(46,218,230,0.1); border-bottom: 1px solid rgba(46,218,230,0.1); }
.feature-layout { display: grid; grid-template-columns: 1.2fr 0.8fr 1fr; gap: 24px; }
.feature-card {
  background: var(--surface-glass);
  border: 1px solid var(--line-1);
  border-radius: var(--radius-card);
  padding: 32px 26px;
  backdrop-filter: blur(14px);
  box-shadow: var(--shadow-card);
  transition: transform 0.3s, border-color 0.3s;
  position: relative;
  overflow: hidden;
}
.feature-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0;
  width: 100%; height: 2px;
  background: linear-gradient(90deg, var(--primary), var(--accent));
  opacity: 0.5;
}
.feature-card:hover { transform: translateY(-4px); border-color: var(--primary); }
.feature-card.dark-card { background: rgba(10,18,36,0.8); }
.feature-card.wide-card { grid-column: span 1; }
.feature-card .icon-box {
  width: 48px; height: 48px;
  border-radius: 12px;
  background: rgba(45,227,228,0.12);
  border: 1px solid rgba(45,227,228,0.25);
  display: flex; align-items: center; justify-content: center;
  margin-bottom: 18px;
  color: var(--primary);
  font-size: 20px;
}
.feature-card h3 { font-size: 18px; color: var(--text-strong); font-weight: 700; margin-bottom: 10px; }
.feature-card p { font-size: 14px; color: var(--text-body); line-height: 1.75; }

/* Showcase Section */
.showcase-section { padding: 96px 0; }
.showcase-item { display: flex; flex-direction: row; gap: 60px; align-items: center; margin-bottom: 100px; }
.showcase-item.reverse { flex-direction: row-reverse; }
.showcase-item:last-child { margin-bottom: 0; }
.showcase-image {
  width: 55%;
  border: 1px solid var(--line-1);
  border-radius: 14px;
  overflow: hidden;
  box-shadow: var(--shadow-card);
  position: relative;
  background: var(--surface-glass);
}
.showcase-image img { width: 100%; height: 320px; object-fit: cover; }
.showcase-text { width: 45%; }
.showcase-text h3 { font-size: 23px; font-weight: 800; color: var(--text-strong); margin-bottom: 14px; line-height: 1.4; }
.showcase-text p { font-size: 15px; color: var(--text-body); line-height: 1.85; margin-bottom: 14px; }
.showcase-list { list-style: none; }
.showcase-list li { position: relative; padding-left: 26px; margin-bottom: 10px; font-size: 14px; color: var(--text-body); }
.showcase-list li::before {
  content: '→';
  position: absolute;
  left: 0;
  color: var(--primary);
  font-size: 14px;
}

/* Scenario Section */
.scenario-section { padding: 96px 0; background: rgba(12,25,52,0.4); }
.scenario-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; }
.scenario-card {
  background: rgba(18,38,64,0.45);
  border: 1px solid var(--line-1);
  border-radius: 16px;
  padding: 32px 22px;
  text-align: center;
  transition: border-color 0.3s, transform 0.3s;
}
.scenario-card:hover { border-color: var(--primary); transform: translateY(-4px); }
.scenario-card i { font-size: 24px; color: var(--accent); margin-bottom: 14px; }
.scenario-card h4 { color: var(--text-strong); font-size: 16px; font-weight: 700; margin-bottom: 8px; }
.scenario-card p { font-size: 13px; color: var(--text-weak); line-height: 1.6; }

/* FAQ */
.faq-section { padding: 96px 0; }
.faq-layout { display: grid; grid-template-columns: 1fr 360px; gap: 60px; }
.faq-list { display: flex; flex-direction: column; }
.faq-item {
  border-bottom: 1px solid rgba(46,218,230,0.15);
  padding: 20px 0;
}
.faq-item:first-child { padding-top: 0; }
.faq-question { display: flex; align-items: flex-start; gap: 12px; cursor: pointer; }
.faq-q {
  width: 28px; height: 28px;
  border-radius: 6px;
  background: rgba(45,227,228,0.12);
  border: 1px solid rgba(45,227,228,0.25);
  color: var(--primary);
  font-family: var(--font-mono);
  font-weight: 800;
  font-size: 13px;
  display: flex; align-items: center; justify-content: center;
  flex-shrink: 0;
  margin-top: 2px;
}
.faq-question h4 { font-size: 16px; color: var(--text-strong); font-weight: 600; flex: 1; }
.faq-icon { color: var(--text-weak); transition: transform 0.25s; }
.faq-item.open .faq-icon { transform: rotate(45deg); }
.faq-answer { display: none; padding: 14px 0 4px 40px; font-size: 14px; color: var(--text-body); line-height: 1.85; }
.faq-item.open .faq-answer { display: block; }

.faq-aside .faq-cta-card {
  background: var(--surface-glass);
  border: 1px solid var(--line-1);
  border-radius: var(--radius-card);
  padding: 28px;
  backdrop-filter: blur(14px);
  position: sticky;
  top: 96px;
}
.faq-cta-card h4 { color: var(--text-strong); font-size: 18px; font-weight: 700; margin-bottom: 10px; }
.faq-cta-card p { font-size: 14px; color: var(--text-body); margin-bottom: 20px; }
.faq-cta-card .btn-primary { width: 100%; justify-content: center; }
.contact-row { display: flex; align-items: center; gap: 10px; margin-top: 16px; color: var(--text-weak); font-size: 14px; }
.contact-row i { color: var(--accent); }

/* Bottom CTA */
.bottom-cta {
  padding: 100px 0;
  background-size: cover;
  background-position: center;
  position: relative;
}
.bottom-cta::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(7,13,31,0.92), rgba(7,13,31,0.85));
  z-index: 0;
}
.bottom-cta .container { position: relative; z-index: 2; text-align: center; }
.bottom-cta h2 { font-size: 34px; font-weight: 900; color: var(--text-strong); margin-bottom: 14px; line-height: 1.3; }
.bottom-cta p { color: var(--text-body); max-width: 480px; margin: 0 auto 28px; }
.bottom-cta .btn-primary { padding: 14px 36px; font-size: 16px; }

/* Footer */
.footer { background: var(--bg-1); border-top: 1px solid var(--line-1); padding: 64px 0 24px; position: relative; z-index: 1; }
.footer-grid { display: grid; grid-template-columns: 1.4fr 1fr 1fr 1.2fr; gap: 48px; margin-bottom: 40px; }
.footer-brand p { font-size: 14px; color: var(--text-weak); margin-top: 12px; line-height: 1.7; max-width: 280px; }
.footer h4 { color: var(--text-strong); font-size: 16px; font-weight: 700; margin-bottom: 16px; }
.footer-links { list-style: none; }
.footer-links li { margin-bottom: 10px; }
.footer-links a { color: var(--text-weak); font-size: 14px; transition: color 0.2s; }
.footer-links a:hover { color: var(--primary); }
.footer-contact { list-style: none; }
.footer-contact li { color: var(--text-weak); font-size: 14px; margin-bottom: 10px; }
.footer-contact i { color: var(--accent); margin-right: 8px; width: 16px; }
.footer-bottom {
  border-top: 1px solid rgba(46,218,230,0.12);
  padding-top: 24px;
  display: flex;
  justify-content: space-between;
  color: var(--text-weak);
  font-size: 13px;
  flex-wrap: wrap;
  gap: 10px;
}
.footer-bottom .domain { font-family: var(--font-mono); }

/* Floating CTA */
.float-cta {
  position: fixed;
  right: 24px;
  bottom: 24px;
  z-index: 200;
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: 12px;
}
.float-main-btn {
  width: 60px; height: 60px;
  border-radius: 50%;
  background: var(--primary);
  color: #071022;
  border: none;
  display: flex; align-items: center; justify-content: center;
  font-size: 20px;
  cursor: pointer;
  box-shadow: 0 4px 20px rgba(45,227,228,0.4);
  transition: all 0.3s;
}
.float-main-btn:hover { background: var(--primary-strong); transform: scale(1.05); }
.float-sub-btns { display: flex; flex-direction: column; gap: 10px; opacity: 0; pointer-events: none; transform: translateY(10px); transition: all 0.3s; }
.float-cta.open .float-sub-btns { opacity: 1; pointer-events: auto; transform: translateY(0); }
.float-sub-btn {
  width: 44px; height: 44px;
  border-radius: 50%;
  background: var(--surface-glass);
  border: 1px solid var(--line-1);
  color: var(--primary);
  font-size: 16px;
  display: flex; align-items: center; justify-content: center;
  backdrop-filter: blur(10px);
  cursor: pointer;
  transition: all 0.25s;
}
.float-sub-btn:hover { border-color: var(--primary); color: var(--primary-strong); }

/* Mobile Nav Toggle */
.mobile-nav-toggle { display: none; background: none; border: none; color: var(--text-strong); font-size: 24px; cursor: pointer; padding: 8px; }
@media (max-width: 1024px) {
  .container { padding: 0 1.5rem; }
  .main-nav { gap: 16px; }
  .nav-link { font-size: 14px; }
  .feature-layout { grid-template-columns: 1fr 1fr; }
  .feature-card.wide-card { grid-column: span 2; }
  .scenario-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 768px) {
  .topbar-actions a:first-child { display: none; }
  .main-header { height: auto; padding: 12px 0; }
  .main-header .container { flex-wrap: wrap; gap: 10px; }
  .mobile-nav-toggle { display: block; }
  .main-nav {
    display: none;
    width: 100%;
    flex-direction: column;
    gap: 0;
    background: rgba(7,13,31,0.96);
    padding: 10px 0;
    border-radius: 0 0 12px 12px;
  }
  .main-nav.open { display: flex; }
  .nav-link { padding: 12px 8px; }
  .nav-link::after { bottom: 6px; }
  .cat-hero { padding: 60px 0 48px; }
  .cat-hero .container { flex-direction: column; gap: 30px; }
  .cat-hero h1 { font-size: 30px; }
  .cat-hero-side { width: 100%; }
  .cat-hero-side img { height: 200px; }
  .intro-section, .feature-section, .showcase-section, .scenario-section, .faq-section, .bottom-cta { padding: 64px 0; }
  .display-grid { font-size: 14px; }
  .timeline-item { flex-direction: column; gap: 10px; padding: 24px 0; }
  .timeline-num { font-size: 24px; }
  .showcase-item, .showcase-item.reverse { flex-direction: column; gap: 32px; }
  .showcase-image, .showcase-text { width: 100%; }
  .showcase-image img { height: 220px; }
  .faq-layout { grid-template-columns: 1fr; gap: 32px; }
  .faq-aside .faq-cta-card { position: static; }
  .footer-grid { grid-template-columns: 1fr 1fr; gap: 32px; }
  .float-cta { display: none; }
}
@media (max-width: 520px) {
  .container { padding: 0 1rem; }
  .topbar-domain { font-size: 11px; }
  .brand-name { font-size: 16px; }
  .cat-hero h1 { font-size: 26px; }
  .cat-hero p.desc { font-size: 15px; }
  .cat-ctas { flex-direction: column; gap: 10px; }
  .btns { width: 100%; text-align: center; justify-content: center; }
  .section-title { font-size: 24px; }
  .feature-layout { grid-template-columns: 1fr; }
  .feature-card.wide-card { grid-column: span 1; }
  .scenario-grid { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; }
  .footer-bottom { flex-direction: column; gap: 6px; }
  .page-loading { font-size: 12px; }
}

/* roulang page: category3 */
:root {
    --bg-0: #070D1F;
    --bg-1: #0C1934;
    --surface-glass: rgba(18, 38, 64, 0.55);
    --line-1: rgba(46, 218, 230, 0.24);
    --line-2: rgba(242, 166, 90, 0.5);
    --primary: #2DE3E4;
    --primary-strong: #73F2F3;
    --accent: #F2A65A;
    --text-strong: #EAF3FF;
    --text-body: #B9C8E5;
    --text-weak: #7E91B5;
  }

  * { margin:0; padding:0; box-sizing:border-box; }
  html { scroll-behavior:smooth; }
  body {
    background: var(--bg-0);
    color: var(--text-body);
    font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
    font-size: 16px;
    line-height: 1.75;
    overflow-x: hidden;
  }
  body::before {
    content: "";
    position: fixed;
    inset: 0;
    background-image:
      linear-gradient(rgba(45, 227, 228, 0.032) 1px, transparent 1px),
      linear-gradient(90deg, rgba(45, 227, 228, 0.032) 1px, transparent 1px);
    background-size: 56px 56px;
    pointer-events: none;
    z-index: 0;
  }
  a { color: var(--primary); text-decoration: none; transition: color .2s ease; }
  a:hover { color: var(--primary-strong); }
  img { max-width: 100%; display: block; }
  .container { max-width: 80rem; margin: 0 auto; padding: 0 40px; }

  /* Topbar */
  .topbar { background: #030812; border-bottom: 1px solid rgba(45,227,228,0.12); height: 36px; display: flex; align-items: center; position: relative; z-index: 11; }
  .topbar-inner { display: flex; justify-content: space-between; align-items: center; font-size: 13px; width: 100%; }
  .topbar .domain { color: var(--text-weak); font-family: Consolas, "JetBrains Mono", monospace; }
  .topbar-actions { display: flex; gap: 14px; align-items: center; font-size: 13px; color: var(--text-body); }
  .topbar-actions .divider { width: 1px; height: 12px; background: var(--line-1); }

  /* Nav */
  .main-header { position: sticky; top: 0; z-index: 50; background: rgba(7,13,31,0.78); backdrop-filter: blur(14px); border-bottom: 1px solid var(--line-1); }
  .main-nav { height: 72px; display: flex; align-items: center; }
  .nav-inner { display: flex; align-items: center; gap: 32px; }
  .brand { display: flex; align-items: center; gap: 10px; flex-shrink: 0; }
  .brand-badge { width: 38px; height: 38px; border-radius: 12px; background: linear-gradient(135deg, rgba(45,227,228,0.2), rgba(45,227,228,0.04)); border: 1px solid var(--line-1); display: flex; align-items: center; justify-content: center; color: var(--primary); font-family: Consolas, "JetBrains Mono", monospace; font-weight: 700; }
  .brand-name { font-size: 22px; font-weight: 900; color: var(--text-strong); letter-spacing: -0.01em; white-space: nowrap; }
  .nav-links { display: flex; gap: 8px; flex: 1; overflow-x: auto; }
  .nav-link { padding: 8px 16px; color: var(--text-body); border-radius: 999px; font-size: 15px; font-weight: 500; transition: all .2s ease; position: relative; white-space: nowrap; }
  .nav-link:hover { color: var(--primary); background: rgba(45,227,228,0.06); }
  .nav-link.active { color: var(--primary); background: rgba(45,227,228,0.10); }
  .nav-link.active::after { content: ""; position: absolute; height: 3px; width: 20px; bottom: 2px; left: 50%; transform: translateX(-50%); background: var(--primary); border-radius: 999px; box-shadow: 0 0 10px rgba(45,227,228,0.8); }
  .nav-cta { margin-left: auto; flex-shrink: 0; }
  .nav-toggle { display: none; background: none; border: none; color: var(--primary); font-size: 22px; cursor: pointer; margin-left: auto; }

  /* Buttons */
  .btn { display: inline-flex; align-items: center; justify-content: center; gap: 8px; font-weight: 700; font-size: 15px; padding: 12px 24px; border-radius: 12px; cursor: pointer; border: none; transition: all .2s ease; }
  .btn-primary { background: var(--primary); color: #06121f; }
  .btn-primary:hover { background: var(--primary-strong); color: #06121f; box-shadow: 0 0 20px rgba(45,227,228,0.55); transform: translateY(-1px); }
  .btn-primary:active { transform: scale(0.98); box-shadow: none; }
  .btn-ghost { background: transparent; color: var(--primary); border: 1px solid var(--line-1); }
  .btn-ghost:hover { background: rgba(45,228,230,0.08); color: var(--primary); border-color: var(--primary); }
  .btn-lg { padding: 14px 32px; font-size: 16px; }

  /* Hero */
  .hero { position: relative; padding: 120px 0 140px; background: linear-gradient(180deg, rgba(7,13,31,0.92), rgba(7,13,31,0.74)), url('/assets/images/backpic/back-1.png') center center / cover no-repeat; overflow: hidden; }
  .hero-content { position: relative; z-index: 2; max-width: 920px; }
  .hero-kicker { display: inline-flex; align-items: center; gap: 8px; padding: 6px 16px; border-radius: 999px; background: rgba(45,227,228,0.08); border: 1px solid var(--line-1); color: var(--primary); font-size: 13px; font-weight: 600; letter-spacing: 0.02em; margin-bottom: 20px; }
  .hero h1 { font-size: 48px; line-height: 1.16; font-weight: 900; color: var(--text-strong); letter-spacing: -0.01em; margin-bottom: 20px; }
  .hero h1 .grad { background: linear-gradient(90deg, var(--primary), #B8F5FF); -webkit-background-clip: text; background-clip: text; color: transparent; }
  .hero-sub { font-size: 18px; color: var(--text-body); max-width: 640px; line-height: 1.7; margin-bottom: 32px; }
  .hero-actions { display: flex; gap: 16px; flex-wrap: wrap; margin-bottom: 56px; }
  .hero-metrics { display: flex; gap: 48px; flex-wrap: wrap; padding-top: 32px; border-top: 1px solid rgba(46,218,230,0.14); }
  .metric-number { font-family: Consolas, "JetBrains Mono", monospace; font-size: 32px; font-weight: 700; color: var(--accent); }
  .metric-label { color: var(--text-weak); font-size: 13px; margin-top: 4px; }

  /* Sections */
  .section { padding: 100px 0; scroll-margin-top: 80px; position: relative; z-index: 1; }
  .section-head { max-width: 740px; margin-bottom: 56px; }
  .section-title { font-size: 32px; font-weight: 700; color: var(--text-strong); line-height: 1.3; margin-bottom: 16px; }
  .section-sub { color: var(--text-body); font-size: 16px; line-height: 1.7; }
  .section-label { display: inline-block; font-size: 13px; font-weight: 600; color: var(--primary); letter-spacing: 0.08em; margin-bottom: 12px; }

  /* Industry grid */
  .grid-vertical { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; }
  .industry-card { position: relative; background: var(--surface-glass); border: 1px solid var(--line-1); border-radius: 18px; padding: 36px 24px 32px; box-shadow: 0 8px 30px rgba(0,0,0,0.35); backdrop-filter: blur(14px); transition: all .3s ease; height: 100%; }
  .industry-card:hover { border-color: rgba(45,227,228,0.5); transform: translateY(-4px); box-shadow: 0 12px 40px rgba(45,227,228,0.15); }
  .industry-icon { width: 52px; height: 52px; border-radius: 14px; background: rgba(45,227,228,0.08); border: 1px solid var(--line-1); display: flex; align-items: center; justify-content: center; font-size: 22px; color: var(--primary); margin-bottom: 20px; }
  .industry-card h3 { font-size: 20px; color: var(--text-strong); margin-bottom: 12px; }
  .industry-card p { font-size: 14px; color: var(--text-body); line-height: 1.7; }

  /* Split blocks */
  .split-block { display: grid; grid-template-columns: 1fr 1fr; gap: 56px; align-items: center; margin-bottom: 32px; }
  .split-block + .split-block { margin-top: 80px; }
  .split-media { border-radius: 16px; overflow: hidden; border: 1px solid rgba(46,218,230,0.18); box-shadow: 0 8px 30px rgba(0,0,0,0.35); background: var(--bg-1); }
  .split-media img { width: 100%; height: 100%; object-fit: cover; }
  .split-body h3 { font-size: 28px; color: var(--text-strong); line-height: 1.35; margin-bottom: 16px; }
  .split-body p { color: var(--text-body); line-height: 1.8; margin-bottom: 12px; }
  .list-dots { list-style: none; margin-top: 16px; padding: 0; }
  .list-dots li { position: relative; padding-left: 22px; margin-bottom: 10px; color: var(--text-body); }
  .list-dots li::before { content: ""; position: absolute; left: 0; top: 10px; width: 8px; height: 8px; border-radius: 50%; background: var(--accent); }

  /* Timeline */
  .timeline { position: relative; max-width: 780px; margin: 0 auto; padding-left: 28px; border-left: 1px solid var(--line-1); counter-reset: tl; }
  .timeline-item { position: relative; padding: 0 0 44px 32px; }
  .timeline-item::before { content: counter(tl); counter-increment: tl; position: absolute; left: -17px; top: 0; width: 34px; height: 34px; border-radius: 50%; background: var(--bg-1); border: 1px solid var(--primary); color: var(--primary); font-family: Consolas, "JetBrains Mono", monospace; display: flex; align-items: center; justify-content: center; font-weight: 700; font-size: 14px; }
  .timeline-item h4 { font-size: 20px; color: var(--text-strong); margin-bottom: 8px; }
  .timeline-item p { color: var(--text-body); font-size: 15px; }

  /* FAQ */
  .faq-layout { display: grid; grid-template-columns: 1.1fr 0.9fr; gap: 56px; align-items: start; }
  .faq-list { border-top: 1px solid rgba(46,218,230,0.18); }
  .faq-item { border-bottom: 1px solid rgba(46,218,230,0.18); padding: 20px 0; }
  .faq-q { display: flex; gap: 14px; cursor: pointer; align-items: flex-start; }
  .faq-q .q-mark { display: flex; width: 28px; height: 28px; border-radius: 8px; background: rgba(45,227,228,0.1); color: var(--primary); align-items: center; justify-content: center; font-family: Consolas, "JetBrains Mono", monospace; font-weight: 700; flex-shrink: 0; }
  .faq-q h3 { font-size: 17px; color: var(--text-strong); font-weight: 600; line-height: 1.5; padding-right: 20px; margin: 2px 0 0; }
  .faq-q .icon { margin-left: auto; color: var(--primary); transition: transform .25s ease; flex-shrink: 0; }
  .faq-item.open .faq-q .icon { transform: rotate(45deg); }
  .faq-a { max-height: 0; overflow: hidden; transition: max-height .25s ease; padding-left: 42px; color: var(--text-body); font-size: 14px; line-height: 1.7; }
  .faq-a-inner { padding: 12px 0 4px; }
  .faq-item.open .faq-a { max-height: 300px; }

  /* Contact card */
  .contact-card { background: linear-gradient(145deg, rgba(18,38,64,0.65), rgba(10,22,42,0.85)); border: 1px solid var(--line-1); border-radius: 20px; padding: 32px; position: sticky; top: 100px; box-shadow: 0 8px 30px rgba(0,0,0,0.35); }
  .contact-card h3 { color: var(--text-strong); margin-bottom: 8px; font-size: 22px; }
  .contact-card p { color: var(--text-weak); margin-bottom: 24px; font-size: 14px; }
  .field { width: 100%; background: rgba(18,38,64,0.5); border: 1px solid var(--line-1); border-radius: 10px; color: var(--text-strong); padding: 12px 14px; font-size: 15px; margin-bottom: 16px; transition: all .2s ease; font-family: inherit; }
  .field:focus { outline: none; border-color: var(--primary); box-shadow: 0 0 0 3px rgba(45,227,228,0.2); }
  textarea.field { min-height: 96px; resize: vertical; }
  .field-label { display: block; font-size: 13px; color: var(--text-weak); margin-bottom: 6px; }

  /* CTA */
  .cta-block { position: relative; padding: 96px 0; text-align: center; background: linear-gradient(180deg, rgba(7,13,31,0.88), rgba(7,13,31,0.92)), url('/assets/images/backpic/back-2.png') center center / cover no-repeat; border-top: 1px solid var(--line-1); border-bottom: 1px solid var(--line-1); }
  .cta-block h2 { font-size: 36px; color: var(--text-strong); margin-bottom: 16px; line-height: 1.3; }
  .cta-block p { color: var(--text-body); max-width: 640px; margin: 0 auto 32px; }

  /* Footer */
  .footer { background: var(--bg-1); border-top: 1px solid var(--line-1); padding: 64px 0 32px; }
  .footer-grid { display: grid; grid-template-columns: 1.4fr 1fr 1fr 1.2fr; gap: 40px; margin-bottom: 40px; }
  .footer-brand p { font-size: 14px; color: var(--text-weak); margin-top: 16px; max-width: 280px; }
  .footer h4 { color: var(--text-strong); font-size: 15px; margin-bottom: 16px; }
  .footer ul { list-style: none; padding: 0; }
  .footer-links li { margin-bottom: 10px; }
  .footer-links a { color: var(--text-body); font-size: 14px; }
  .footer-links a:hover { color: var(--primary); }
  .footer-contact li { color: var(--text-body); font-size: 14px; margin-bottom: 10px; }
  .footer-contact i { color: var(--primary); margin-right: 8px; width: 16px; }
  .footer-bottom { border-top: 1px solid rgba(46,218,230,0.12); padding-top: 24px; display: flex; justify-content: space-between; color: var(--text-weak); font-size: 13px; font-family: Consolas, "JetBrains Mono", monospace; flex-wrap: wrap; gap: 8px; }

  /* Floating CTA */
  .floating-cta { position: fixed; right: 28px; bottom: 28px; z-index: 60; display: flex; flex-direction: column; gap: 8px; align-items: flex-end; }
  .fab-main { width: 64px; height: 64px; border-radius: 50%; display: flex; align-items: center; justify-content: center; background: var(--primary); color: #06121f; font-size: 24px; box-shadow: 0 8px 30px rgba(45,227,228,0.5); cursor: pointer; border: none; transition: all .2s ease; }
  .fab-main:hover { background: var(--primary-strong); transform: scale(1.04); }
  .fab-menu { position: absolute; right: 0; bottom: 72px; display: flex; flex-direction: column; gap: 8px; opacity: 0; visibility: hidden; transform: translateY(6px); transition: all .2s ease; }
  .floating-cta.open .fab-menu { opacity: 1; visibility: visible; transform: translateY(0); }
  .fab-link { display: flex; align-items: center; gap: 8px; background: rgba(12,25,52,0.95); border: 1px solid var(--line-1); padding: 10px 16px; border-radius: 999px; color: var(--text-strong); font-size: 14px; box-shadow: 0 8px 30px rgba(0,0,0,0.35); white-space: nowrap; }
  .fab-link i { color: var(--primary); }
  .mobile-fab { display: none; }

  /* Responsive */
  @media (max-width: 1024px) {
    .container { padding: 0 28px; }
    .grid-vertical { grid-template-columns: repeat(2, 1fr); }
    .split-block { gap: 32px; }
    .faq-layout { grid-template-columns: 1fr; }
    .contact-card { position: static; }
    .footer-grid { grid-template-columns: 1fr 1fr; }
  }
  @media (max-width: 768px) {
    .container { padding: 0 20px; }
    .topbar-inner { flex-direction: row; }
    .main-nav { height: auto; padding: 16px 0; align-items: flex-start; }
    .nav-inner { flex-wrap: wrap; gap: 12px; }
    .nav-links { order: 3; width: 100%; overflow-x: auto; padding-bottom: 8px; -webkit-overflow-scrolling: touch; }
    .nav-toggle { display: block; }
    .nav-cta { display: none; }
    .hero { padding: 80px 0 100px; }
    .hero h1 { font-size: 40px; }
    .split-block { grid-template-columns: 1fr; }
    .grid-vertical { grid-template-columns: 1fr; }
    .section { padding: 64px 0; }
    .footer-grid { grid-template-columns: 1fr; gap: 32px; }
    .section-title { font-size: 26px; }
  }
  @media (max-width: 520px) {
    .container { padding: 0 16px; }
    .hero h1 { font-size: 32px; }
    .topbar-actions span:first-child { display: none; }
    .hero-actions { flex-direction: column; }
    .hero-actions .btn { width: 100%; }
    .floating-cta { display: none; }
    .mobile-fab { display: flex; position: fixed; bottom: 0; left: 0; right: 0; height: 54px; z-index: 60; align-items: center; justify-content: center; background: rgba(7,13,31,0.95); backdrop-filter: blur(12px); border-top: 1px solid var(--line-1); }
    .mobile-fab .btn { width: 90%; }
    body { padding-bottom: 54px; }
    .cta-block h2 { font-size: 28px; }
  }