/* ============================================================
   湖南脉冲星网络科技 — 公司官网（Premium Edition）
   配色：深蓝(#0a1929) + 白 + 深绿(#00a896)
   ============================================================ */

:root {
  --navy: #0a1929;
  --navy-deep: #060f1a;
  --navy-light: #112640;
  --teal: #00a896;
  --teal-light: #00d4bf;
  --teal-glow: rgba(0, 168, 150, 0.35);
  --text: #1a1a2e;
  --text-muted: #647084;
  --text-light: #94a3b8;
  --bg-light: #f7f8fa;
  --border: #e4e7ec;
  --white: #ffffff;
  --radius: 16px;
  --radius-sm: 12px;
  --shadow: 0 4px 24px rgba(10, 25, 41, 0.06);
  --shadow-lg: 0 20px 60px rgba(10, 25, 41, 0.12);
  --transition: all 0.35s cubic-bezier(0.4, 0, 0.2, 1);
  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
}

/* ---- Reset ---- */
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 80px; }
body {
  margin: 0;
  font-family: "PingFang SC", "Microsoft YaHei", "Noto Sans CJK SC", system-ui, -apple-system, sans-serif;
  font-size: 16px;
  line-height: 1.7;
  color: var(--text);
  background: var(--white);
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}
a { color: inherit; text-decoration: none; }
img { display: block; max-width: 100%; }
button { font: inherit; cursor: pointer; border: none; background: none; }
ul { list-style: none; padding: 0; margin: 0; }

/* ---- Scroll Progress Bar ---- */
.scroll-progress {
  position: fixed;
  top: 0; left: 0;
  width: 0%; height: 2px;
  background: linear-gradient(90deg, var(--teal), var(--teal-light));
  box-shadow: 0 0 10px var(--teal-glow);
  z-index: 1000;
  transition: width 0.1s linear;
}

/* ---- Layout ---- */
.wrap { max-width: 1160px; margin: 0 auto; padding: 0 24px; }
.section-title {
  font-size: clamp(28px, 4vw, 40px);
  font-weight: 800;
  color: var(--navy);
  margin: 0 0 16px;
  letter-spacing: -0.03em;
  line-height: 1.2;
}
.section-desc {
  font-size: 17px;
  color: var(--text-muted);
  margin: 0 0 56px;
  max-width: 560px;
}

/* ---- Header ---- */
.site-header {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  height: 72px;
  background: rgba(10, 25, 41, 0.85);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  transition: var(--transition);
}
.site-header.scrolled {
  height: 60px;
  background: rgba(10, 25, 41, 0.96);
  box-shadow: 0 4px 30px rgba(0, 0, 0, 0.15);
}

.nav-wrap {
  max-width: 1160px;
  height: 100%;
  margin: 0 auto;
  padding: 0 24px;
  display: flex;
  align-items: center;
  gap: 40px;
}

.logo { display: flex; align-items: center; gap: 10px; color: var(--white); flex-shrink: 0; }
.logo-dot {
  width: 9px; height: 9px;
  background: var(--teal);
  border-radius: 50%;
  box-shadow: 0 0 0 0 rgba(0, 168, 150, 0.5);
  animation: pulse-dot 2s ease-out infinite;
}
@keyframes pulse-dot {
  0% { box-shadow: 0 0 0 0 rgba(0, 168, 150, 0.5); }
  70% { box-shadow: 0 0 0 8px rgba(0, 168, 150, 0); }
  100% { box-shadow: 0 0 0 0 rgba(0, 168, 150, 0); }
}
.logo-text { font-size: 18px; font-weight: 700; letter-spacing: 0.06em; }

.main-nav { display: flex; gap: 32px; flex: 1; }
.main-nav a {
  font-size: 14px;
  color: rgba(255, 255, 255, 0.7);
  transition: color 0.25s;
  position: relative;
}
.main-nav a::after {
  content: '';
  position: absolute;
  bottom: -6px; left: 50%;
  width: 0; height: 2px;
  background: var(--teal);
  transition: width 0.25s, left 0.25s;
}
.main-nav a:hover { color: var(--white); }
.main-nav a:hover::after { width: 100%; left: 0; }

.nav-cta {
  flex-shrink: 0;
  padding: 9px 22px;
  font-size: 14px;
  font-weight: 600;
  color: var(--teal);
  border: 1px solid rgba(0, 168, 150, 0.45);
  border-radius: 8px;
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}
.nav-cta::before {
  content: '';
  position: absolute;
  top: 0; left: -100%;
  width: 100%; height: 100%;
  background: linear-gradient(90deg, transparent, rgba(0, 168, 150, 0.15), transparent);
  transition: left 0.5s;
}
.nav-cta:hover {
  background: var(--teal);
  color: var(--white);
  border-color: var(--teal);
  box-shadow: 0 4px 20px rgba(0, 168, 150, 0.3);
}
.nav-cta:hover::before { left: 100%; }

.menu-btn { display: none; }

/* ---- Hero ---- */
.hero {
  background: var(--navy);
  color: var(--white);
  padding: 180px 0 120px;
  position: relative;
  overflow: hidden;
  min-height: 100vh;
  display: flex;
  align-items: center;
}
.hero-bg {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.55;
  transform: scale(1.05);
  will-change: transform;
}
.hero-overlay {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse at 30% 50%, rgba(0, 168, 150, 0.12) 0%, transparent 50%),
    radial-gradient(ellipse at 80% 20%, rgba(0, 212, 191, 0.08) 0%, transparent 40%),
    linear-gradient(180deg, rgba(10, 25, 41, 0.3) 0%, rgba(10, 25, 41, 0.85) 100%);
  pointer-events: none;
}
.hero-grid {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(255,255,255,0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,0.03) 1px, transparent 1px);
  background-size: 60px 60px;
  opacity: 0.4;
  mask-image: radial-gradient(ellipse at center, black 0%, transparent 70%);
  -webkit-mask-image: radial-gradient(ellipse at center, black 0%, transparent 70%);
  animation: grid-drift 20s linear infinite;
}
@keyframes grid-drift {
  0% { transform: translateY(0); }
  100% { transform: translateY(60px); }
}

.hero-particles {
  position: absolute;
  inset: 0;
  overflow: hidden;
  pointer-events: none;
}
.hero-particles span {
  position: absolute;
  width: 4px; height: 4px;
  background: var(--teal);
  border-radius: 50%;
  opacity: 0.4;
  animation: float-up 12s linear infinite;
}
@keyframes float-up {
  0% { transform: translateY(100vh) scale(0); opacity: 0; }
  10% { opacity: 0.4; }
  90% { opacity: 0.4; }
  100% { transform: translateY(-10vh) scale(1.5); opacity: 0; }
}

.hero-inner {
  position: relative;
  z-index: 2;
  max-width: 1160px;
  margin: 0 auto;
  padding: 0 24px;
}

.hero-tag {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-size: 13px;
  color: rgba(255, 255, 255, 0.55);
  margin: 0 0 28px;
  letter-spacing: 0.04em;
}
.hero-tag::before {
  content: '';
  width: 24px; height: 1px;
  background: var(--teal);
}

.hero h1 {
  font-size: clamp(40px, 5.5vw, 64px);
  font-weight: 800;
  line-height: 1.1;
  letter-spacing: -0.03em;
  margin: 0 0 30px;
}
.hero h1 span {
  display: inline;
  background: linear-gradient(135deg, var(--white) 0%, var(--teal-light) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-sub {
  font-size: clamp(16px, 2vw, 20px);
  line-height: 1.85;
  color: rgba(255, 255, 255, 0.72);
  margin: 0 0 44px;
  max-width: 640px;
}
.hero-sub strong { color: var(--white); font-weight: 600; }

.hero-btns { display: flex; gap: 18px; flex-wrap: wrap; }

.hero-trust {
  margin-top: 56px;
  font-size: 13px;
  color: rgba(255, 255, 255, 0.4);
  letter-spacing: 0.02em;
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
}
.hero-trust::before {
  content: '';
  width: 32px; height: 1px;
  background: rgba(0, 168, 150, 0.5);
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 15px 34px;
  font-size: 15px;
  font-weight: 600;
  border-radius: 10px;
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}
.btn::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(90deg, transparent, rgba(255,255,255,0.2), transparent);
  transform: translateX(-100%);
  transition: transform 0.6s;
}
.btn:hover::after { transform: translateX(100%); }
.btn-primary {
  background: var(--teal);
  color: var(--white);
  box-shadow: 0 8px 30px rgba(0, 168, 150, 0.35);
}
.btn-primary:hover {
  background: #009080;
  transform: translateY(-2px);
  box-shadow: 0 12px 40px rgba(0, 168, 150, 0.45);
}
.btn-ghost {
  border: 1px solid rgba(255, 255, 255, 0.25);
  color: var(--white);
  background: rgba(255, 255, 255, 0.05);
}
.btn-ghost:hover {
  border-color: var(--teal);
  background: rgba(0, 168, 150, 0.12);
  transform: translateY(-2px);
}

/* ---- Scroll Reveal ---- */
.reveal {
  opacity: 0;
  transform: translateY(40px);
  transition: opacity 0.8s var(--ease-out), transform 0.8s var(--ease-out);
}
.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}
.reveal.delay-1 { transition-delay: 0.1s; }
.reveal.delay-2 { transition-delay: 0.2s; }
.reveal.delay-3 { transition-delay: 0.3s; }
.reveal.delay-4 { transition-delay: 0.4s; }

/* ---- Promise ---- */
.promise { padding: 100px 0; background: var(--navy); color: var(--white); position: relative; overflow: hidden; }
.promise::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0; height: 1px;
  background: linear-gradient(90deg, transparent, rgba(0, 168, 150, 0.6), transparent);
}
.promise-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}
.promise-item {
  padding: 32px 28px;
  border-radius: var(--radius-sm);
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(255, 255, 255, 0.08);
  backdrop-filter: blur(10px);
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}
.promise-item::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0; height: 2px;
  background: linear-gradient(90deg, var(--teal), var(--teal-light));
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.4s var(--ease-out);
}
.promise-item:hover {
  background: rgba(255, 255, 255, 0.08);
  border-color: rgba(0, 168, 150, 0.3);
  transform: translateY(-4px);
  box-shadow: 0 20px 50px rgba(0, 0, 0, 0.2);
}
.promise-item:hover::before { transform: scaleX(1); }
.promise-item strong {
  display: block;
  font-size: 16px;
  font-weight: 700;
  color: var(--white);
  margin-bottom: 12px;
}
.promise-item p {
  font-size: 14px;
  line-height: 1.75;
  color: rgba(255, 255, 255, 0.55);
  margin: 0;
}

/* ---- About ---- */
.about { padding: 120px 0; background: var(--bg-light); position: relative; overflow: hidden; }
.about::before {
  content: '';
  position: absolute;
  top: -200px; right: -200px;
  width: 500px; height: 500px;
  background: radial-gradient(circle, rgba(0, 168, 150, 0.08) 0%, transparent 70%);
  pointer-events: none;
}

.about-layout {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 80px;
  align-items: center;
}

.about-text h2 { font-size: clamp(28px, 3.5vw, 40px); font-weight: 800; color: var(--navy); margin: 0 0 28px; letter-spacing: -0.03em; }
.about-text p { font-size: 16px; line-height: 1.9; color: #475569; margin: 0 0 20px; }
.about-slogan {
  margin-top: 32px;
  font-size: 22px;
  font-weight: 700;
  color: var(--navy);
  padding-left: 24px;
  border-left: 4px solid var(--teal);
  background: linear-gradient(90deg, var(--navy), var(--teal));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.about-visual-wrap {
  position: relative;
}
.about-visual {
  border-radius: var(--radius);
  box-shadow: var(--shadow-lg);
  position: relative;
  z-index: 2;
  transition: transform 0.6s var(--ease-out);
}
.about-visual-wrap::before {
  content: '';
  position: absolute;
  inset: -20px;
  background: linear-gradient(135deg, rgba(0, 168, 150, 0.15), transparent 60%);
  border-radius: 28px;
  z-index: 1;
  opacity: 0.6;
}

.about-stats {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1px;
  background: var(--border);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  overflow: hidden;
  margin-top: 40px;
}
.stat {
  background: var(--white);
  padding: 32px 24px;
  text-align: center;
  transition: var(--transition);
}
.stat:hover { background: #f0fdfa; }
.stat strong {
  display: block;
  font-size: 36px;
  font-weight: 800;
  color: var(--navy);
  margin-bottom: 6px;
  letter-spacing: -0.02em;
}
.stat span { font-size: 13px; color: var(--text-muted); }

/* ---- Business ---- */
.business { padding: 120px 0; position: relative; }
.business::before {
  content: '';
  position: absolute;
  bottom: -150px; left: -150px;
  width: 400px; height: 400px;
  background: radial-gradient(circle, rgba(0, 168, 150, 0.06) 0%, transparent 70%);
  pointer-events: none;
}

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

.biz-card {
  padding: 44px 40px;
  border-radius: var(--radius);
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}
.biz-card::before {
  content: '';
  position: absolute;
  inset: 0;
  border-radius: var(--radius);
  padding: 1px;
  background: linear-gradient(135deg, rgba(0, 168, 150, 0.4), transparent 50%);
  -webkit-mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
  -webkit-mask-composite: xor;
  mask-composite: exclude;
  opacity: 0;
  transition: opacity 0.4s;
  pointer-events: none;
}
.biz-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-lg);
}
.biz-card:hover::before { opacity: 1; }

.biz-360 {
  background: var(--navy);
  color: var(--white);
}
.biz-product {
  background: var(--bg-light);
  border: 1px solid var(--border);
}

.biz-label {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 12px;
  font-weight: 600;
  padding: 5px 14px;
  border-radius: 6px;
  margin-bottom: 22px;
  letter-spacing: 0.04em;
}
.biz-label::before {
  content: '';
  width: 6px; height: 6px;
  border-radius: 50%;
}
.biz-360 .biz-label { background: rgba(0, 168, 150, 0.15); color: var(--teal-light); }
.biz-360 .biz-label::before { background: var(--teal-light); box-shadow: 0 0 8px var(--teal); }
.biz-product .biz-label { background: #e0f5f2; color: var(--teal); }
.biz-product .biz-label::before { background: var(--teal); }

.biz-card h3 { font-size: 24px; font-weight: 700; margin: 0 0 18px; }
.biz-360 h3 { color: var(--white); }
.biz-product h3 { color: var(--navy); }

.biz-card > p { font-size: 15px; line-height: 1.85; margin: 0 0 28px; }
.biz-360 > p { color: rgba(255, 255, 255, 0.65); }
.biz-product > p { color: #475569; }

.biz-list { margin-bottom: 28px; }
.biz-list li {
  font-size: 14px;
  line-height: 1.65;
  padding: 12px 0;
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
  display: flex;
  align-items: baseline;
  gap: 10px;
}
.biz-360 .biz-list li { color: rgba(255, 255, 255, 0.75); }
.biz-product .biz-list li {
  color: #475569;
  border-bottom: 1px solid var(--border);
}
.biz-list li:last-child { border-bottom: none; }
.biz-list li::before {
  content: '';
  flex-shrink: 0;
  width: 5px; height: 5px;
  border-radius: 50%;
  background: var(--teal);
}

.biz-note { font-size: 14px; color: rgba(255, 255, 255, 0.4); margin: 0 0 20px; }
.biz-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 15px;
  font-weight: 600;
  color: var(--teal);
  transition: gap 0.25s;
}
.biz-link::after { content: '→'; transition: transform 0.25s; }
.biz-link:hover { gap: 14px; }
.biz-link:hover::after { transform: translateX(4px); }

/* ---- Methodology ---- */
.methodology { padding: 120px 0; background: var(--white); position: relative; overflow: hidden; }
.methodology-visual {
  position: absolute;
  right: -10%; top: 50%;
  transform: translateY(-50%);
  width: 45%;
  opacity: 0.08;
  pointer-events: none;
}

.method-list {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  margin-bottom: 48px;
  position: relative;
  z-index: 2;
}
.method-item {
  padding: 36px 32px;
  border-radius: var(--radius-sm);
  background: var(--bg-light);
  border: 1px solid var(--border);
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}
.method-item::after {
  content: '';
  position: absolute;
  bottom: 0; left: 0; right: 0; height: 3px;
  background: linear-gradient(90deg, var(--teal), var(--teal-light));
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.5s var(--ease-out);
}
.method-item:hover {
  background: var(--white);
  border-color: rgba(0, 168, 150, 0.25);
  transform: translateY(-4px);
  box-shadow: 0 16px 45px rgba(10, 25, 41, 0.08);
}
.method-item:hover::after { transform: scaleX(1); }
.method-num {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 40px; height: 40px;
  border-radius: 50%;
  background: var(--navy);
  color: var(--white);
  font-size: 13px;
  font-weight: 700;
  margin-bottom: 20px;
  position: relative;
}
.method-num::after {
  content: '';
  position: absolute;
  inset: -4px;
  border-radius: 50%;
  border: 1px solid var(--teal);
  opacity: 0.3;
}
.method-item h3 {
  font-size: 18px;
  font-weight: 700;
  color: var(--navy);
  margin: 0 0 12px;
}
.method-item p {
  font-size: 14px;
  line-height: 1.75;
  color: var(--text-muted);
  margin: 0;
}

.method-footer {
  text-align: center;
  padding: 36px;
  border-radius: var(--radius-sm);
  background: linear-gradient(135deg, var(--navy) 0%, var(--navy-light) 100%);
  border: 1px solid rgba(0, 168, 150, 0.2);
  position: relative;
  z-index: 2;
  overflow: hidden;
}
.method-footer::before {
  content: '';
  position: absolute;
  top: 0; left: -100%;
  width: 100%; height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255,255,255,0.05), transparent);
  animation: shimmer 4s infinite;
}
@keyframes shimmer {
  0% { left: -100%; }
  100% { left: 100%; }
}
.method-footer p {
  font-size: 20px;
  font-weight: 700;
  color: var(--white);
  margin: 0;
  position: relative;
  z-index: 2;
}

/* ---- News ---- */
.news { padding: 120px 0; background: var(--bg-light); }

.news-list { max-width: 800px; margin: 0 auto; }
.news-item {
  display: flex;
  gap: 32px;
  padding: 32px 0;
  border-bottom: 1px solid var(--border);
  transition: var(--transition);
}
.news-item:first-child { padding-top: 0; }
.news-item:hover { padding-left: 12px; }
.news-item time {
  flex-shrink: 0;
  font-size: 13px;
  color: var(--text-light);
  font-weight: 600;
  min-width: 60px;
  padding-top: 2px;
}
.news-tag {
  display: inline-block;
  font-size: 11px;
  padding: 3px 10px;
  border-radius: 4px;
  background: #e0f5f2;
  color: var(--teal);
  margin-bottom: 10px;
  font-weight: 600;
}
.news-item h3 { font-size: 18px; font-weight: 700; color: var(--navy); margin: 0 0 10px; transition: color 0.25s; }
.news-item:hover h3 { color: var(--teal); }
.news-item p { font-size: 14px; color: var(--text-muted); line-height: 1.75; margin: 0 0 12px; }
.news-item a {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 13px;
  color: var(--teal);
  font-weight: 600;
}
.news-item a::after { content: '→'; transition: transform 0.25s; }
.news-item a:hover::after { transform: translateX(4px); }

.news-empty {
  text-align: center;
  color: var(--text-light);
  font-size: 15px;
  padding: 48px 0;
}

/* ---- Contact ---- */
.contact { padding: 120px 0; background: var(--navy); color: var(--white); position: relative; overflow: hidden; }
.contact::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0; height: 1px;
  background: linear-gradient(90deg, transparent, rgba(0, 168, 150, 0.5), transparent);
}
.contact::after {
  content: '';
  position: absolute;
  bottom: -100px; right: -100px;
  width: 400px; height: 400px;
  background: radial-gradient(circle, rgba(0, 168, 150, 0.1) 0%, transparent 60%);
  pointer-events: none;
}

.contact-layout {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 80px;
  align-items: center;
  position: relative;
  z-index: 2;
}
.contact-text h2 { font-size: clamp(28px, 3.5vw, 40px); font-weight: 800; margin: 0 0 20px; letter-spacing: -0.03em; }
.contact-text p { font-size: 17px; color: rgba(255, 255, 255, 0.6); margin: 0; }

.contact-info { display: flex; flex-direction: column; gap: 22px; }
.contact-item {
  display: flex;
  align-items: baseline;
  gap: 18px;
  padding: 20px 24px;
  border-radius: var(--radius-sm);
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(255, 255, 255, 0.08);
  transition: var(--transition);
}
.contact-item:hover {
  background: rgba(255, 255, 255, 0.08);
  border-color: rgba(0, 168, 150, 0.3);
  transform: translateX(6px);
}
.contact-item:last-child { border-bottom: none; padding-bottom: 20px; }
.ci-label { font-size: 13px; color: rgba(255, 255, 255, 0.4); min-width: 48px; }
.ci-value { font-size: 15px; color: rgba(255, 255, 255, 0.9); }
.ci-value a { color: var(--teal-light); transition: opacity 0.2s; }
.ci-value a:hover { opacity: 0.8; }

/* ---- Footer ---- */
.site-footer {
  background: var(--navy-deep);
  color: rgba(255, 255, 255, 0.5);
  padding: 56px 0 28px;
}
.footer-inner {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  padding-bottom: 36px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}
.footer-left .logo { margin-bottom: 18px; }
.footer-left p { font-size: 13px; line-height: 1.9; margin: 0; }
.footer-right { display: flex; gap: 32px; }
.footer-right a { font-size: 13px; color: rgba(255, 255, 255, 0.5); transition: color 0.25s; position: relative; }
.footer-right a::after {
  content: '';
  position: absolute;
  bottom: -4px; left: 0;
  width: 0; height: 1px;
  background: var(--teal);
  transition: width 0.25s;
}
.footer-right a:hover { color: var(--teal-light); }
.footer-right a:hover::after { width: 100%; }

.footer-bottom {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
  padding-top: 28px;
  font-size: 12px;
  color: rgba(255, 255, 255, 0.3);
}
.footer-sep { color: rgba(255, 255, 255, 0.15); }

/* ---- Back to top ---- */
.back-top {
  position: fixed;
  bottom: 32px; right: 32px;
  width: 48px; height: 48px;
  border-radius: 50%;
  background: var(--navy);
  color: var(--white);
  font-size: 18px;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  pointer-events: none;
  transition: var(--transition);
  z-index: 50;
  border: 1px solid rgba(255, 255, 255, 0.1);
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.2);
}
.back-top.show { opacity: 1; pointer-events: auto; }
.back-top:hover {
  background: var(--teal);
  transform: translateY(-3px);
  box-shadow: 0 8px 30px rgba(0, 168, 150, 0.4);
}

/* ---- Mouse Glow Effect for Cards ---- */
.glow-card {
  position: relative;
  overflow: hidden;
}
.glow-card .glow {
  position: absolute;
  width: 200px; height: 200px;
  background: radial-gradient(circle, rgba(0, 168, 150, 0.18) 0%, transparent 70%);
  border-radius: 50%;
  pointer-events: none;
  opacity: 0;
  transition: opacity 0.3s;
  transform: translate(-50%, -50%);
  z-index: 10;
}
.glow-card:hover .glow { opacity: 1; }

/* ============================================================
   Responsive
   ============================================================ */
@media (max-width: 900px) {
  .main-nav { display: none; }
  .nav-cta { display: none; }
  .menu-btn {
    display: flex;
    flex-direction: column;
    justify-content: center;
    gap: 5px;
    width: 40px; height: 40px;
    margin-left: auto;
  }
  .menu-btn span { width: 20px; height: 2px; background: var(--white); transition: 0.2s; }
  .menu-btn[aria-expanded="true"] span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
  .menu-btn[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
  .menu-btn[aria-expanded="true"] span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }
  .main-nav.open {
    display: flex;
    position: fixed;
    top: 60px; left: 0; right: 0;
    flex-direction: column;
    gap: 0;
    background: rgba(10, 25, 41, 0.98);
    padding: 16px 24px 24px;
  }
  .main-nav.open a {
    padding: 14px 0;
    font-size: 15px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.06);
  }

  .hero { padding: 140px 0 100px; min-height: auto; }
  .hero-bg { opacity: 0.45; }

  .about-layout { grid-template-columns: 1fr; gap: 48px; }
  .about-visual-wrap { order: -1; }
  .biz-grid { grid-template-columns: 1fr; }
  .contact-layout { grid-template-columns: 1fr; gap: 48px; }

  .promise-grid { grid-template-columns: 1fr 1fr; gap: 16px; }
  .method-list { grid-template-columns: 1fr; gap: 16px; }

  .news-item { flex-direction: column; gap: 10px; }
  .footer-inner { flex-direction: column; gap: 28px; }
  .footer-right { flex-wrap: wrap; gap: 20px; }
}

@media (max-width: 600px) {
  .promise-grid { grid-template-columns: 1fr; }
  .about-stats { grid-template-columns: 1fr; }
  .biz-card { padding: 32px 24px; }
  .method-item { padding: 28px 24px; }
  .back-top { bottom: 20px; right: 20px; }
}

/* ---- Reduced Motion ---- */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
  html { scroll-behavior: auto; }
}

/* ============================================================
   首页 Hero 关键词带
   ============================================================ */
.hero-keywords {
  margin: 18px 0 0;
  font-size: 13px;
  color: rgba(255, 255, 255, 0.65);
  line-height: 1.8;
}
.hero-keywords a {
  color: var(--teal-light);
  text-decoration: underline;
  text-underline-offset: 3px;
  transition: var(--transition);
}
.hero-keywords a:hover { color: #fff; }

/* ============================================================
   GEO 优化落地页（geo-optimization.html）
   ============================================================ */
.geo-hero {
  background:
    radial-gradient(circle at 75% 20%, rgba(0, 168, 150, 0.25), transparent 45%),
    linear-gradient(145deg, #0a1929 0%, #060f1a 100%);
  color: #fff;
  padding: 130px 0 100px;
  text-align: center;
  position: relative;
}
.geo-hero h1 {
  font-size: clamp(2rem, 5.5vw, 3.6rem);
  font-weight: 800;
  line-height: 1.25;
  letter-spacing: -0.02em;
  margin: 16px 0 24px;
}
.geo-hero h1 span { color: var(--teal-light); }
.geo-hero .hero-sub {
  font-size: 16px;
  line-height: 1.9;
  color: rgba(255, 255, 255, 0.85);
  margin: 0 0 32px;
}
.geo-hero .hero-sub strong { color: var(--teal-light); }
.geo-hero .hero-tag {
  font-size: 13px;
  letter-spacing: 0.12em;
  color: var(--teal-light);
  text-transform: uppercase;
}

.geo-block { padding: 90px 0; background: var(--white); }
.geo-block-dark { background: var(--navy); color: var(--white); }
.geo-block-dark .section-title { color: var(--white); }
.geo-block-dark .section-desc { color: rgba(255, 255, 255, 0.7); }

.geo-compare {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
  margin: 48px auto 0;
  max-width: 900px;
}
.geo-col {
  background: var(--bg-light);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 32px;
}
.geo-col h3 {
  font-size: 18px;
  font-weight: 700;
  color: var(--navy);
  margin: 0 0 14px;
}
.geo-col p {
  font-size: 15px;
  line-height: 1.85;
  color: var(--text);
  margin: 0 0 12px;
}
.geo-col-accent {
  background: linear-gradient(160deg, rgba(0, 168, 150, 0.08), rgba(0, 168, 150, 0.16));
  border-color: rgba(0, 168, 150, 0.4);
}
.geo-col-accent h3 { color: var(--teal); }
.geo-fade { color: var(--text-muted) !important; font-size: 14px !important; }
.geo-highlight {
  color: var(--teal) !important;
  font-weight: 600;
}
.geo-note {
  max-width: 720px;
  margin: 36px auto 0;
  text-align: center;
  font-size: 15px;
  line-height: 2;
  color: var(--text-muted);
}

.geo-services {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
  margin-top: 48px;
}
.gs-item {
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: var(--radius-sm);
  padding: 28px;
  transition: var(--transition);
}
.gs-item:hover {
  background: rgba(255, 255, 255, 0.1);
  border-color: var(--teal);
  transform: translateY(-3px);
}
.gs-item h3 {
  font-size: 16px;
  font-weight: 600;
  color: var(--teal-light);
  margin: 0 0 10px;
}
.gs-item p {
  font-size: 14px;
  line-height: 1.75;
  color: rgba(255, 255, 255, 0.75);
  margin: 0;
}

.geo-audience {
  max-width: 720px;
  margin: 40px auto 0;
}
.geo-audience ul {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: 14px;
}
.geo-audience li {
  padding: 18px 24px;
  background: var(--bg-light);
  border-left: 3px solid var(--teal);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  font-size: 15px;
  line-height: 1.7;
  color: var(--text);
}
.geo-audience li strong { color: var(--navy); }

.geo-cta {
  background:
    radial-gradient(circle at 25% 50%, rgba(0, 168, 150, 0.2), transparent 50%),
    linear-gradient(145deg, #0a1929, #112640);
  color: #fff;
  padding: 90px 0;
  text-align: center;
}
.geo-cta h2 {
  font-size: clamp(1.5rem, 3.5vw, 2.2rem);
  font-weight: 700;
  margin: 0 0 16px;
}
.geo-cta p {
  color: rgba(255, 255, 255, 0.75);
  font-size: 15px;
  margin: 0 0 32px;
}
.geo-cta .btn-primary { background: var(--teal); }
.geo-cta .btn-primary:hover { background: var(--teal-light); }

@media (max-width: 768px) {
  .geo-compare { grid-template-columns: 1fr; }
  .geo-services { grid-template-columns: 1fr; }
  .geo-hero { padding: 100px 0 70px; }
  .geo-block { padding: 64px 0; }
}

/* ============================================================
   顶部导航 - 电话按钮
   ============================================================ */
.nav-phone {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  margin-left: 12px;
  padding: 8px 16px;
  background: linear-gradient(135deg, var(--teal), var(--teal-light));
  color: var(--white) !important;
  border-radius: 100px;
  font-size: 14px;
  font-weight: 600;
  transition: var(--transition);
  white-space: nowrap;
}
.nav-phone:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px var(--teal-glow);
}
.nav-phone .phone-icon {
  font-size: 16px;
}
.phone-banner {
  display: none;
  background: linear-gradient(90deg, var(--teal), var(--teal-light));
  color: var(--white);
  text-align: center;
  padding: 10px 16px;
  font-size: 14px;
  font-weight: 600;
  letter-spacing: 0.02em;
}

/* ============================================================
   FAQ 常见问题
   ============================================================ */
.faq { padding: 100px 0; background: var(--white); }
.faq-list {
  max-width: 820px;
  margin: 48px auto 0;
  display: flex;
  flex-direction: column;
  gap: 14px;
}
.faq-item {
  background: var(--bg-light);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 0;
  transition: var(--transition);
  overflow: hidden;
}
.faq-item:hover {
  border-color: var(--teal);
  box-shadow: 0 4px 16px rgba(0, 168, 150, 0.08);
}
.faq-item[open] {
  border-color: var(--teal);
  background: var(--white);
  box-shadow: var(--shadow);
}
.faq-item summary {
  cursor: pointer;
  padding: 22px 28px;
  font-size: 16px;
  font-weight: 600;
  color: var(--text);
  list-style: none;
  position: relative;
  transition: var(--transition);
}
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary::after {
  content: "+";
  position: absolute;
  right: 28px;
  top: 50%;
  transform: translateY(-50%);
  font-size: 26px;
  font-weight: 300;
  color: var(--teal);
  transition: transform 0.3s;
}
.faq-item[open] summary::after {
  transform: translateY(-50%) rotate(45deg);
}
.faq-item summary:hover { color: var(--teal); }
.faq-answer {
  padding: 0 28px 24px;
  color: var(--text-muted);
  font-size: 15px;
  line-height: 1.85;
}
.faq-answer p { margin: 0 0 12px; }
.faq-answer p:last-child { margin-bottom: 0; }
.faq-answer ul {
  list-style: disc;
  padding-left: 20px;
  margin: 8px 0;
}
.faq-answer ul li { margin-bottom: 6px; }
.faq-answer a {
  color: var(--teal);
  text-decoration: underline;
  text-underline-offset: 3px;
}

/* ============================================================
   文章页 (Article)
   ============================================================ */
.article {
  padding: 60px 0 80px;
  background: var(--white);
}
.article .wrap {
  max-width: 820px;
}
.breadcrumb {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  color: var(--text-muted);
  margin-bottom: 24px;
}
.breadcrumb a {
  color: var(--teal);
  transition: var(--transition);
}
.breadcrumb a:hover { text-decoration: underline; }
.breadcrumb span { color: var(--text-light); }

.article-head {
  margin-bottom: 40px;
  padding-bottom: 30px;
  border-bottom: 1px solid var(--border);
}
.article-cat {
  display: inline-block;
  padding: 4px 14px;
  background: rgba(0, 168, 150, 0.1);
  color: var(--teal);
  border-radius: 100px;
  font-size: 12px;
  font-weight: 600;
  margin-bottom: 16px;
}
.article-head h1 {
  font-size: clamp(1.6rem, 4vw, 2.4rem);
  font-weight: 800;
  color: var(--navy);
  line-height: 1.35;
  letter-spacing: -0.02em;
  margin: 0 0 16px;
}
.article-meta {
  font-size: 13px;
  color: var(--text-muted);
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
  margin: 0;
}
.meta-sep { color: var(--text-light); }

.article-body {
  font-size: 16px;
  line-height: 1.95;
  color: var(--text);
}
.article-body .lead {
  font-size: 17px;
  color: var(--text);
  margin: 0 0 32px;
  padding: 20px 24px;
  background: var(--bg-light);
  border-left: 3px solid var(--teal);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
}
.article-body h2 {
  font-size: 20px;
  font-weight: 700;
  color: var(--navy);
  margin: 40px 0 16px;
  letter-spacing: -0.01em;
}
.article-body p {
  margin: 0 0 16px;
  color: var(--text);
}
.article-body ul, .article-body ol {
  margin: 0 0 20px 0;
  padding-left: 24px;
}
.article-body ul li, .article-body ol li {
  margin-bottom: 8px;
  line-height: 1.85;
}
.article-body ul { list-style: disc; }
.article-body ol { list-style: decimal; }
.article-body a {
  color: var(--teal);
  text-decoration: underline;
  text-underline-offset: 3px;
}
.article-body strong { color: var(--navy); }

.article-cta {
  background: linear-gradient(135deg, #0a1929, #112640);
  color: var(--white);
  padding: 32px;
  border-radius: var(--radius);
  margin-top: 48px;
  text-align: center;
}
.article-cta p {
  margin: 0 0 8px;
  color: rgba(255, 255, 255, 0.85);
  font-size: 15px;
}
.article-cta p:last-of-type { margin-bottom: 20px; }
.article-cta a {
  color: var(--teal-light);
  text-decoration: none;
  font-weight: 600;
}
.article-cta a:hover { text-decoration: underline; }
.article-cta .btn {
  display: inline-block;
  margin-top: 8px;
  background: var(--teal);
  color: var(--white);
  padding: 12px 28px;
  border-radius: 100px;
  font-weight: 600;
  text-decoration: none;
}
.article-cta .btn:hover { background: var(--teal-light); }

/* ============================================================
   联系我们 - 电话 CTA
   ============================================================ */
.contact-phone-cta {
  display: inline-flex;
  flex-direction: column;
  margin-top: 28px;
  padding: 22px 36px;
  background: linear-gradient(135deg, var(--teal), var(--teal-light));
  color: var(--white) !important;
  border-radius: var(--radius-sm);
  text-align: center;
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}
.contact-phone-cta:hover {
  transform: translateY(-3px);
  box-shadow: 0 12px 30px var(--teal-glow);
}
.contact-phone-cta .cta-label {
  font-size: 13px;
  opacity: 0.9;
  margin-bottom: 4px;
  letter-spacing: 0.05em;
}
.contact-phone-cta .cta-num {
  font-size: 28px;
  font-weight: 800;
  letter-spacing: 0.02em;
  font-family: 'SF Mono', 'Monaco', 'Inconsolata', monospace, sans-serif;
}

/* ============================================================
   资质条（小图 + 名称，点击查看大图）
   ============================================================ */
.credentials {
  padding: 48px 0 56px;
  background: var(--bg-light);
  border-top: 1px solid var(--border);
}
.cred-row {
  display: flex;
  justify-content: center;
  align-items: flex-end;
  gap: 48px;
  flex-wrap: wrap;
}
.cred-item {
  margin: 0;
  text-align: center;
  max-width: 200px;
}
.cred-thumb {
  display: block;
  width: 148px;
  height: 105px;
  margin: 0 auto;
  padding: 8px;
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: 8px;
  box-shadow: 0 2px 10px rgba(10, 25, 41, 0.06);
  overflow: hidden;
  cursor: zoom-in;
  transition: var(--transition);
}
.cred-thumb:hover {
  border-color: var(--teal);
  transform: translateY(-3px);
  box-shadow: 0 8px 24px rgba(0, 168, 150, 0.15);
}
.cred-thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  border-radius: 4px;
}
.cred-item figcaption {
  margin-top: 10px;
  display: flex;
  flex-direction: column;
  gap: 2px;
}
.cred-name {
  font-size: 13px;
  font-weight: 600;
  color: var(--text);
}
.cred-sub {
  font-size: 11px;
  color: var(--text-muted);
  line-height: 1.5;
}
.cred-note {
  margin: 24px auto 0;
  max-width: 640px;
  text-align: center;
  font-size: 12px;
  line-height: 1.8;
  color: var(--text-muted);
}

/* ---- Lightbox 大图预览 ---- */
.lightbox {
  position: fixed;
  inset: 0;
  z-index: 1000;
  display: none;
  align-items: center;
  justify-content: center;
  background: rgba(6, 15, 26, 0.92);
  padding: 32px;
}
.lightbox.open { display: flex; }
.lightbox img {
  max-width: min(92vw, 900px);
  max-height: 88vh;
  border-radius: 8px;
  box-shadow: 0 24px 80px rgba(0, 0, 0, 0.5);
}
.lightbox-close {
  position: absolute;
  top: 20px;
  right: 24px;
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.12);
  color: var(--white);
  font-size: 26px;
  line-height: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: var(--transition);
}
.lightbox-close:hover {
  background: var(--teal);
  transform: rotate(90deg);
}

/* 文章页内的证书图 */
.article-cert {
  margin: 28px 0;
  background: var(--bg-light);
  border-radius: var(--radius);
  padding: 20px;
  text-align: center;
}
.article-cert img {
  max-width: min(100%, 420px);
  border-radius: 6px;
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.08);
  margin: 0 auto;
}
.article-cert figcaption {
  margin-top: 12px;
  font-size: 13px;
  color: var(--text-muted);
}

/* ============================================================
   Footer 重构
   ============================================================ */
.site-footer { background: var(--navy-deep); color: rgba(255, 255, 255, 0.85); }
.footer-top {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr 1fr;
  gap: 40px;
  padding: 60px 0 40px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}
.footer-col .logo {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 19px;
  font-weight: 700;
  color: var(--white);
  margin-bottom: 14px;
}
.footer-col .logo-dot {
  width: 10px; height: 10px;
  background: var(--teal);
  border-radius: 50%;
  box-shadow: 0 0 12px var(--teal);
}
.footer-desc {
  font-size: 13px;
  color: rgba(255, 255, 255, 0.65);
  line-height: 1.7;
  margin: 0 0 12px;
}
.footer-phone {
  font-size: 15px;
  color: var(--teal-light);
  margin: 0;
}
.footer-phone a { color: var(--teal-light); font-weight: 600; }
.footer-col h4 {
  font-size: 14px;
  font-weight: 600;
  color: var(--white);
  margin: 0 0 16px;
  letter-spacing: 0.05em;
}
.footer-col a {
  display: block;
  font-size: 13px;
  color: rgba(255, 255, 255, 0.65);
  margin-bottom: 8px;
  transition: var(--transition);
}
.footer-col a:hover { color: var(--teal-light); padding-left: 4px; }
.footer-col p {
  font-size: 13px;
  color: rgba(255, 255, 255, 0.65);
  margin: 0 0 8px;
  line-height: 1.7;
}
.footer-bottom {
  padding: 24px 0;
  font-size: 12px;
  color: rgba(255, 255, 255, 0.55);
  text-align: center;
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 10px;
}
.footer-bottom a { color: var(--teal-light); }
.footer-sep { color: rgba(255, 255, 255, 0.25); }

/* ============================================================
   响应式补充
   ============================================================ */
@media (max-width: 1024px) {
  .footer-top { grid-template-columns: 1fr 1fr; gap: 32px; }
  .nav-phone .phone-text { display: none; }
  .nav-phone { padding: 8px 12px; }
}

@media (max-width: 768px) {
  .nav-phone { display: none; }
  .phone-banner { display: block; }
  .cred-row { gap: 28px; }
  .cred-item { max-width: 160px; }
  .cred-thumb { width: 120px; height: 86px; }
  .footer-top { grid-template-columns: 1fr; gap: 28px; padding: 40px 0 28px; }
  .contact-phone-cta { padding: 18px 24px; }
  .contact-phone-cta .cta-num { font-size: 24px; }
  .article-head h1 { font-size: 1.5rem; }
  .article-body .lead { padding: 16px 18px; font-size: 15px; }
  .article-body h2 { font-size: 18px; margin: 32px 0 12px; }
  .faq-item summary { padding: 18px 22px; font-size: 15px; }
  .faq-item summary::after { right: 20px; }
  .faq-answer { padding: 0 22px 20px; font-size: 14px; }
}

@media (max-width: 600px) {
  .promise-grid { grid-template-columns: 1fr; }
  .about-stats { grid-template-columns: 1fr; }
  .biz-card { padding: 32px 24px; }
  .method-item { padding: 28px 24px; }
  .back-top { bottom: 20px; right: 20px; }
}