/* 瑞灵科技 · 设计系统 */
:root {
  --bg-deep: #050b1e;
  --bg-panel: #0c1530;
  --bg-panel-hi: #111d42;
  --primary: #1a3a8f;
  --accent: #00d4ff;
  --accent-glow: rgba(0, 212, 255, 0.42);
  --silver: #e8ecf4;
  --text-main: #e8ecf4;
  --text-sub: #8a97b8;
  --text-dim: #5a6a8e;
  --border-soft: rgba(232, 236, 244, 0.08);
  --border-neon: rgba(0, 212, 255, 0.35);
  --gradient-main: linear-gradient(135deg, #1a3a8f 0%, #00d4ff 100%);
  --gradient-bg: radial-gradient(ellipse at top, #0c1530 0%, #050b1e 60%);
  --shadow-neon: 0 0 40px rgba(0, 212, 255, 0.18);
  --shadow-card: 0 20px 60px rgba(0, 10, 40, 0.55);
  --transition: 0.35s cubic-bezier(0.4, 0.1, 0.2, 1);
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 22px;
}

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

html { scroll-behavior: smooth; }

body {
  font-family: 'Noto Sans SC', 'PingFang SC', 'Microsoft YaHei', system-ui, sans-serif;
  background: var(--bg-deep);
  color: var(--text-main);
  line-height: 1.7;
  min-height: 100vh;
  overflow-x: hidden;
  position: relative;
}

/* 星点背景 */
body::before {
  content: '';
  position: fixed;
  inset: 0;
  background:
    radial-gradient(2px 2px at 20% 30%, rgba(255,255,255,0.4), transparent),
    radial-gradient(1px 1px at 65% 70%, rgba(0,212,255,0.5), transparent),
    radial-gradient(1.5px 1.5px at 80% 20%, rgba(255,255,255,0.3), transparent),
    radial-gradient(1px 1px at 10% 80%, rgba(0,212,255,0.4), transparent),
    radial-gradient(2px 2px at 45% 50%, rgba(255,255,255,0.35), transparent),
    radial-gradient(1px 1px at 90% 65%, rgba(0,212,255,0.3), transparent),
    var(--gradient-bg);
  background-size: 800px 800px, 600px 600px, 700px 700px, 500px 500px, 900px 900px, 650px 650px, 100% 100%;
  z-index: -2;
  animation: starDrift 120s linear infinite;
}

body::after {
  content: '';
  position: fixed;
  inset: 0;
  background: radial-gradient(ellipse at 70% 20%, rgba(0, 212, 255, 0.08) 0%, transparent 50%),
              radial-gradient(ellipse at 20% 80%, rgba(26, 58, 143, 0.15) 0%, transparent 55%);
  z-index: -1;
  pointer-events: none;
}

@keyframes starDrift {
  from { background-position: 0 0, 0 0, 0 0, 0 0, 0 0, 0 0, 0 0; }
  to { background-position: 800px 800px, -600px 600px, 700px -700px, -500px 500px, 900px -900px, -650px 650px, 0 0; }
}

a { color: inherit; text-decoration: none; transition: color var(--transition); }
img { max-width: 100%; height: auto; display: block; object-fit: cover; }
button { font-family: inherit; cursor: pointer; border: none; background: none; color: inherit; }

/* 导航 */
.nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  backdrop-filter: blur(18px);
  background: rgba(5, 11, 30, 0.72);
  border-bottom: 1px solid var(--border-soft);
  transition: all var(--transition);
}
.nav-inner {
  max-width: 1280px;
  margin: 0 auto;
  padding: 1.1rem 1.6rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.brand {
  display: flex;
  align-items: center;
  gap: 0.7rem;
  font-family: 'Orbitron', 'Noto Sans SC', sans-serif;
  font-weight: 700;
  font-size: 1.15rem;
  letter-spacing: 0.04em;
}
.brand-mark {
  width: 34px;
  height: 34px;
  border-radius: 10px;
  background: var(--gradient-main);
  display: grid;
  place-items: center;
  color: #fff;
  font-size: 1.05rem;
  box-shadow: var(--shadow-neon);
}
.brand-name { background: var(--gradient-main); -webkit-background-clip: text; background-clip: text; color: transparent; }

.nav-links {
  display: flex;
  gap: 2rem;
  list-style: none;
  font-size: 0.95rem;
}
.nav-links a {
  color: var(--text-sub);
  position: relative;
  padding: 0.4rem 0;
  transition: color var(--transition);
}
.nav-links a:hover, .nav-links a.active { color: var(--accent); }
.nav-links a::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--gradient-main);
  transition: width var(--transition);
}
.nav-links a:hover::after, .nav-links a.active::after { width: 100%; }

.nav-cta {
  padding: 0.55rem 1.3rem;
  border-radius: 999px;
  background: var(--gradient-main);
  color: #fff;
  font-weight: 500;
  font-size: 0.92rem;
  box-shadow: 0 0 20px rgba(0, 212, 255, 0.25);
  transition: transform var(--transition), box-shadow var(--transition);
}
.nav-cta:hover { transform: translateY(-2px); box-shadow: 0 0 32px rgba(0, 212, 255, 0.55); }

.nav-burger {
  display: none;
  width: 28px;
  height: 24px;
  position: relative;
}
.nav-burger span {
  position: absolute;
  left: 0; right: 0;
  height: 2px;
  background: var(--text-main);
  transition: all var(--transition);
}
.nav-burger span:nth-child(1) { top: 4px; }
.nav-burger span:nth-child(2) { top: 11px; }
.nav-burger span:nth-child(3) { top: 18px; }
.nav.open .nav-burger span:nth-child(1) { top: 11px; transform: rotate(45deg); }
.nav.open .nav-burger span:nth-child(2) { opacity: 0; }
.nav.open .nav-burger span:nth-child(3) { top: 11px; transform: rotate(-45deg); }

/* 容器 */
.container { max-width: 1280px; margin: 0 auto; padding: 0 1.6rem; }
.section { padding: clamp(4rem, 8vw, 7rem) 0; position: relative; }

/* 通用标题 */
.section-tag {
  display: inline-block;
  font-family: 'Orbitron', sans-serif;
  font-size: 0.78rem;
  letter-spacing: 0.25em;
  color: var(--accent);
  text-transform: uppercase;
  padding: 0.35rem 0.9rem;
  border: 1px solid var(--border-neon);
  border-radius: 999px;
  margin-bottom: 1.2rem;
  background: rgba(0, 212, 255, 0.06);
}
.section-title {
  font-size: clamp(1.8rem, 4vw, 2.7rem);
  font-weight: 700;
  line-height: 1.25;
  margin-bottom: 1rem;
  letter-spacing: -0.01em;
}
.section-title em {
  font-style: normal;
  background: var(--gradient-main);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.section-desc {
  color: var(--text-sub);
  font-size: clamp(0.95rem, 1.4vw, 1.05rem);
  max-width: 620px;
  line-height: 1.8;
}
.section-head {
  text-align: center;
  margin-bottom: 3.5rem;
}
.section-head .section-desc { margin: 0 auto; }

/* 按钮 */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
  padding: 0.85rem 1.8rem;
  border-radius: 999px;
  font-weight: 500;
  font-size: 0.98rem;
  transition: all var(--transition);
  cursor: pointer;
}
.btn-primary {
  background: var(--gradient-main);
  color: #fff;
  box-shadow: 0 10px 30px rgba(0, 212, 255, 0.25);
}
.btn-primary:hover { transform: translateY(-3px); box-shadow: 0 14px 40px rgba(0, 212, 255, 0.45); }
.btn-ghost {
  border: 1px solid var(--border-neon);
  color: var(--silver);
  background: rgba(0, 212, 255, 0.04);
}
.btn-ghost:hover { background: rgba(0, 212, 255, 0.12); border-color: var(--accent); }
.btn-sm { padding: 0.55rem 1.15rem; font-size: 0.88rem; }

/* Hero */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding-top: 6rem;
  position: relative;
  overflow: hidden;
}
.hero-inner {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 4rem;
  align-items: center;
}
.hero-title {
  font-family: 'Orbitron', 'Noto Sans SC', sans-serif;
  font-size: clamp(2.2rem, 5.6vw, 4rem);
  line-height: 1.1;
  font-weight: 800;
  margin-bottom: 1.6rem;
  letter-spacing: -0.02em;
}
.hero-title span {
  background: var(--gradient-main);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  display: inline-block;
}
.hero-sub {
  color: var(--text-sub);
  font-size: clamp(1rem, 1.5vw, 1.12rem);
  line-height: 1.8;
  margin-bottom: 2.4rem;
  max-width: 520px;
}
.hero-actions { display: flex; gap: 1rem; flex-wrap: wrap; margin-bottom: 3rem; }
.hero-stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.2rem;
  padding: 1.6rem;
  border: 1px solid var(--border-soft);
  border-radius: var(--radius-md);
  background: rgba(12, 21, 48, 0.45);
  backdrop-filter: blur(10px);
}
.hero-stat-num {
  font-family: 'Orbitron', sans-serif;
  font-size: clamp(1.5rem, 2.6vw, 2.1rem);
  font-weight: 700;
  color: var(--accent);
  line-height: 1;
}
.hero-stat-label {
  font-size: 0.82rem;
  color: var(--text-dim);
  margin-top: 0.4rem;
  letter-spacing: 0.05em;
}

.hero-visual {
  position: relative;
  aspect-ratio: 1 / 1;
  max-width: 480px;
  justify-self: end;
}
.hero-visual-frame {
  position: absolute;
  inset: 0;
  border-radius: 30% 70% 70% 30% / 30% 30% 70% 70%;
  background: var(--gradient-main);
  opacity: 0.25;
  filter: blur(50px);
  animation: blob 18s ease-in-out infinite;
}
.hero-visual img {
  position: absolute;
  inset: 6%;
  width: 88%;
  height: 88%;
  border-radius: var(--radius-lg);
  object-fit: cover;
  border: 1px solid var(--border-neon);
  box-shadow: 0 30px 80px rgba(0, 212, 255, 0.2);
}
.hero-visual-orbit {
  position: absolute;
  inset: -10%;
  border: 1px dashed rgba(0, 212, 255, 0.25);
  border-radius: 50%;
  animation: spin 40s linear infinite;
}
.hero-visual-orbit::before {
  content: '';
  position: absolute;
  top: 50%;
  right: -6px;
  width: 12px; height: 12px;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 14px var(--accent);
}

@keyframes spin { to { transform: rotate(360deg); } }
@keyframes blob {
  0%, 100% { border-radius: 30% 70% 70% 30% / 30% 30% 70% 70%; }
  50% { border-radius: 70% 30% 30% 70% / 70% 70% 30% 30%; }
}

/* 业务卡片网格 */
.grid-cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1.6rem;
}
.card {
  position: relative;
  padding: 2rem 1.8rem;
  background: rgba(12, 21, 48, 0.55);
  backdrop-filter: blur(12px);
  border: 1px solid var(--border-soft);
  border-radius: var(--radius-md);
  transition: all var(--transition);
  overflow: hidden;
}
.card::before {
  content: '';
  position: absolute;
  inset: -1px;
  border-radius: var(--radius-md);
  background: linear-gradient(135deg, transparent, var(--border-neon), transparent);
  opacity: 0;
  transition: opacity var(--transition);
  z-index: -1;
  padding: 1px;
  -webkit-mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
  -webkit-mask-composite: xor;
  mask-composite: exclude;
}
.card:hover::before { opacity: 1; }
.card:hover {
  transform: translateY(-6px);
  background: rgba(17, 29, 66, 0.7);
  box-shadow: var(--shadow-card);
}
.card-icon {
  width: 52px; height: 52px;
  border-radius: 12px;
  display: grid;
  place-items: center;
  background: rgba(0, 212, 255, 0.1);
  color: var(--accent);
  margin-bottom: 1.2rem;
  font-size: 1.4rem;
  border: 1px solid var(--border-neon);
}
.card-title {
  font-size: 1.2rem;
  font-weight: 600;
  margin-bottom: 0.7rem;
  letter-spacing: -0.01em;
}
.card-desc { color: var(--text-sub); font-size: 0.95rem; line-height: 1.7; }

/* 产品卡片 */
.product-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 1.8rem;
}
.product-card {
  background: rgba(12, 21, 48, 0.6);
  backdrop-filter: blur(10px);
  border: 1px solid var(--border-soft);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: all var(--transition);
  cursor: pointer;
  display: flex;
  flex-direction: column;
}
.product-card:hover {
  transform: translateY(-8px);
  border-color: var(--border-neon);
  box-shadow: var(--shadow-card);
}
.product-img-wrap {
  aspect-ratio: 4 / 3;
  overflow: hidden;
  position: relative;
}
.product-img-wrap img {
  width: 100%; height: 100%;
  object-fit: cover;
  transition: transform 0.8s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}
.product-card:hover .product-img-wrap img { transform: scale(1.08); }
.product-badge {
  position: absolute;
  top: 14px; left: 14px;
  padding: 0.35rem 0.8rem;
  background: rgba(0, 212, 255, 0.15);
  color: var(--accent);
  border: 1px solid var(--border-neon);
  border-radius: 999px;
  font-size: 0.75rem;
  letter-spacing: 0.05em;
  backdrop-filter: blur(8px);
}
.product-info { padding: 1.5rem 1.4rem; flex: 1; display: flex; flex-direction: column; }
.product-cat {
  font-size: 0.78rem;
  color: var(--accent);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  margin-bottom: 0.5rem;
  font-family: 'Orbitron', sans-serif;
}
.product-name {
  font-size: 1.08rem;
  font-weight: 600;
  margin-bottom: 0.6rem;
  line-height: 1.4;
}
.product-meta {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  margin-bottom: 1rem;
  font-size: 0.85rem;
  color: var(--text-sub);
}
.product-rating {
  color: #ffc53d;
  letter-spacing: 0.1em;
  font-size: 0.9rem;
}
.product-bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-top: auto;
  padding-top: 0.8rem;
  border-top: 1px solid var(--border-soft);
}
.product-price {
  font-family: 'Orbitron', sans-serif;
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--accent);
}
.product-price small { font-size: 0.8rem; color: var(--text-dim); font-weight: 400; margin-left: 0.2rem; }

/* 数据展示墙 */
.stats-wall {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 1.4rem;
  padding: 2.5rem;
  background: linear-gradient(135deg, rgba(26, 58, 143, 0.25), rgba(0, 212, 255, 0.08));
  border: 1px solid var(--border-neon);
  border-radius: var(--radius-lg);
  backdrop-filter: blur(14px);
}
.stats-wall-item { text-align: center; padding: 1rem 0.5rem; }
.stats-wall-num {
  font-family: 'Orbitron', sans-serif;
  font-size: clamp(2rem, 4vw, 2.8rem);
  font-weight: 800;
  background: var(--gradient-main);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  line-height: 1;
  margin-bottom: 0.5rem;
}
.stats-wall-label {
  font-size: 0.92rem;
  color: var(--text-sub);
  letter-spacing: 0.05em;
}

/* 时间线 */
.timeline { position: relative; max-width: 860px; margin: 0 auto; padding-left: 2.4rem; }
.timeline::before {
  content: '';
  position: absolute;
  left: 10px;
  top: 0; bottom: 0;
  width: 1px;
  background: linear-gradient(to bottom, var(--accent), transparent);
}
.timeline-item {
  position: relative;
  padding: 0 0 2.6rem 2rem;
}
.timeline-item::before {
  content: '';
  position: absolute;
  left: -1.9rem;
  top: 0.3rem;
  width: 12px; height: 12px;
  border-radius: 50%;
  background: var(--bg-deep);
  border: 2px solid var(--accent);
  box-shadow: 0 0 12px var(--accent-glow);
}
.timeline-date {
  font-family: 'Orbitron', sans-serif;
  color: var(--accent);
  font-size: 0.9rem;
  letter-spacing: 0.1em;
  margin-bottom: 0.4rem;
}
.timeline-title { font-size: 1.12rem; font-weight: 600; margin-bottom: 0.5rem; }
.timeline-desc { color: var(--text-sub); font-size: 0.94rem; line-height: 1.7; }

/* 页脚 */
.footer {
  border-top: 1px solid var(--border-soft);
  padding: 4rem 0 2rem;
  background: rgba(5, 11, 30, 0.5);
  margin-top: 4rem;
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr repeat(3, 1fr);
  gap: 3rem;
  margin-bottom: 3rem;
}
.footer-col h4 {
  font-size: 0.95rem;
  margin-bottom: 1.2rem;
  color: var(--text-main);
  letter-spacing: 0.05em;
}
.footer-col ul { list-style: none; }
.footer-col ul li { margin-bottom: 0.6rem; }
.footer-col ul li a { color: var(--text-sub); font-size: 0.9rem; transition: color var(--transition); }
.footer-col ul li a:hover { color: var(--accent); }
.footer-desc { color: var(--text-sub); font-size: 0.92rem; line-height: 1.8; margin-top: 1rem; }
.footer-bottom {
  padding-top: 2rem;
  border-top: 1px solid var(--border-soft);
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 1rem;
  font-size: 0.85rem;
  color: var(--text-dim);
}
.footer-bottom a { color: var(--text-sub); transition: color var(--transition); }
.footer-bottom a:hover { color: var(--accent); }

/* 返回顶部 */
.back-top {
  position: fixed;
  right: 24px;
  bottom: 24px;
  width: 52px; height: 52px;
  border-radius: 50%;
  background: var(--gradient-main);
  display: grid;
  place-items: center;
  color: #fff;
  box-shadow: 0 10px 30px rgba(0, 212, 255, 0.35);
  cursor: pointer;
  opacity: 0;
  visibility: hidden;
  transform: translateY(20px);
  transition: all var(--transition);
  z-index: 90;
}
.back-top.show { opacity: 1; visibility: visible; transform: translateY(0); }
.back-top:hover { transform: translateY(-4px); box-shadow: 0 14px 40px rgba(0, 212, 255, 0.55); }
.back-top svg { width: 22px; height: 22px; }

/* 漂浮客服 */
.chat-fab {
  position: fixed;
  right: 24px;
  bottom: 96px;
  width: 56px; height: 56px;
  border-radius: 50%;
  background: linear-gradient(135deg, #00d4ff, #1a3a8f);
  display: grid;
  place-items: center;
  color: #fff;
  box-shadow: 0 10px 30px rgba(0, 212, 255, 0.4);
  cursor: pointer;
  z-index: 91;
  transition: all var(--transition);
}
.chat-fab::after {
  content: '';
  position: absolute;
  inset: -6px;
  border-radius: 50%;
  border: 1px solid var(--accent);
  opacity: 0.5;
  animation: pulse 2s ease-out infinite;
}
@keyframes pulse {
  0% { transform: scale(1); opacity: 0.5; }
  100% { transform: scale(1.6); opacity: 0; }
}
.chat-fab:hover { transform: translateY(-4px); }
.chat-fab svg { width: 26px; height: 26px; }

.chat-panel {
  position: fixed;
  right: 24px;
  bottom: 164px;
  width: 340px;
  max-width: calc(100vw - 48px);
  height: 440px;
  max-height: calc(100vh - 200px);
  background: rgba(12, 21, 48, 0.96);
  backdrop-filter: blur(20px);
  border: 1px solid var(--border-neon);
  border-radius: var(--radius-md);
  box-shadow: 0 30px 80px rgba(0, 0, 0, 0.6);
  z-index: 92;
  opacity: 0;
  visibility: hidden;
  transform: translateY(20px) scale(0.95);
  transform-origin: bottom right;
  transition: all var(--transition);
  display: flex;
  flex-direction: column;
  overflow: hidden;
}
.chat-panel.show { opacity: 1; visibility: visible; transform: translateY(0) scale(1); }
.chat-header {
  padding: 1rem 1.2rem;
  background: var(--gradient-main);
  color: #fff;
  display: flex;
  align-items: center;
  gap: 0.7rem;
}
.chat-avatar {
  width: 36px; height: 36px;
  border-radius: 50%;
  background: rgba(255,255,255,0.2);
  display: grid; place-items: center;
}
.chat-title-wrap h5 { font-size: 0.95rem; font-weight: 600; margin-bottom: 2px; }
.chat-title-wrap p { font-size: 0.75rem; opacity: 0.85; }
.chat-close { margin-left: auto; width: 28px; height: 28px; border-radius: 50%; display: grid; place-items: center; transition: background var(--transition); }
.chat-close:hover { background: rgba(255,255,255,0.2); }
.chat-body {
  flex: 1;
  padding: 1rem;
  overflow-y: auto;
  display: flex;
  flex-direction: column;
  gap: 0.8rem;
}
.chat-msg {
  max-width: 80%;
  padding: 0.7rem 1rem;
  border-radius: 14px;
  font-size: 0.88rem;
  line-height: 1.5;
}
.chat-msg.bot {
  background: rgba(0, 212, 255, 0.12);
  color: var(--text-main);
  border: 1px solid var(--border-neon);
  align-self: flex-start;
  border-bottom-left-radius: 4px;
}
.chat-msg.user {
  background: var(--gradient-main);
  color: #fff;
  align-self: flex-end;
  border-bottom-right-radius: 4px;
}
.chat-input-wrap {
  padding: 0.8rem;
  border-top: 1px solid var(--border-soft);
  display: flex;
  gap: 0.5rem;
}
.chat-input {
  flex: 1;
  padding: 0.7rem 1rem;
  background: rgba(5, 11, 30, 0.6);
  border: 1px solid var(--border-soft);
  border-radius: 999px;
  color: var(--text-main);
  font-size: 0.88rem;
  outline: none;
  transition: border-color var(--transition);
}
.chat-input:focus { border-color: var(--accent); }
.chat-send {
  width: 40px; height: 40px;
  border-radius: 50%;
  background: var(--gradient-main);
  color: #fff;
  display: grid; place-items: center;
  transition: transform var(--transition);
}
.chat-send:hover { transform: scale(1.05); }

/* 页面头部 banner (非首页) */
.page-banner {
  padding: 10rem 0 5rem;
  text-align: center;
  position: relative;
}
.page-banner h1 {
  font-family: 'Orbitron', 'Noto Sans SC', sans-serif;
  font-size: clamp(2rem, 5vw, 3rem);
  font-weight: 700;
  margin-bottom: 1rem;
}
.page-banner h1 span { background: var(--gradient-main); -webkit-background-clip: text; background-clip: text; color: transparent; }
.page-banner .breadcrumb {
  color: var(--text-sub);
  font-size: 0.92rem;
  letter-spacing: 0.05em;
}
.page-banner .breadcrumb a { color: var(--accent); }
.page-banner .breadcrumb span { margin: 0 0.6rem; color: var(--text-dim); }

/* 两栏 */
.two-col {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 3rem;
  align-items: center;
}
.two-col img { border-radius: var(--radius-md); box-shadow: var(--shadow-card); border: 1px solid var(--border-soft); }

/* 评价 */
.review-list { display: grid; gap: 1.2rem; }
.review-item {
  padding: 1.5rem;
  background: rgba(12, 21, 48, 0.6);
  border: 1px solid var(--border-soft);
  border-radius: var(--radius-md);
}
.review-head { display: flex; align-items: center; gap: 0.9rem; margin-bottom: 0.8rem; }
.review-avatar {
  width: 42px; height: 42px;
  border-radius: 50%;
  background: var(--gradient-main);
  color: #fff;
  display: grid; place-items: center;
  font-weight: 600;
  font-family: 'Orbitron', sans-serif;
}
.review-meta h6 { font-size: 0.95rem; font-weight: 600; margin-bottom: 2px; }
.review-meta span { font-size: 0.8rem; color: var(--text-dim); }
.review-stars { color: #ffc53d; margin-left: auto; font-size: 0.9rem; letter-spacing: 0.1em; }
.review-text { color: var(--text-sub); font-size: 0.92rem; line-height: 1.7; }

/* 订单表单 */
.order-form {
  padding: 2.2rem;
  background: rgba(12, 21, 48, 0.7);
  border: 1px solid var(--border-neon);
  border-radius: var(--radius-lg);
  backdrop-filter: blur(12px);
}
.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.2rem;
  margin-bottom: 1.2rem;
}
.form-group { display: flex; flex-direction: column; }
.form-group.full { grid-column: 1 / -1; }
.form-group label {
  font-size: 0.85rem;
  color: var(--text-sub);
  margin-bottom: 0.5rem;
  letter-spacing: 0.03em;
}
.form-group input,
.form-group select,
.form-group textarea {
  padding: 0.85rem 1rem;
  background: rgba(5, 11, 30, 0.6);
  border: 1px solid var(--border-soft);
  border-radius: var(--radius-sm);
  color: var(--text-main);
  font-size: 0.94rem;
  font-family: inherit;
  outline: none;
  transition: all var(--transition);
}
.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  border-color: var(--accent);
  background: rgba(5, 11, 30, 0.8);
  box-shadow: 0 0 0 3px rgba(0, 212, 255, 0.12);
}
.form-group textarea { resize: vertical; min-height: 120px; }
.form-summary {
  padding: 1.4rem;
  background: rgba(0, 212, 255, 0.06);
  border: 1px dashed var(--border-neon);
  border-radius: var(--radius-sm);
  margin-bottom: 1.5rem;
}
.form-summary-row {
  display: flex;
  justify-content: space-between;
  padding: 0.4rem 0;
  font-size: 0.92rem;
}
.form-summary-row.total {
  border-top: 1px solid var(--border-soft);
  margin-top: 0.5rem;
  padding-top: 0.8rem;
  font-weight: 600;
  color: var(--accent);
  font-size: 1.1rem;
}

/* 详情页 */
.detail-hero {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 3.5rem;
  align-items: start;
}
.detail-gallery { position: sticky; top: 6rem; }
.detail-gallery-main {
  aspect-ratio: 4 / 3;
  border-radius: var(--radius-md);
  overflow: hidden;
  border: 1px solid var(--border-soft);
  margin-bottom: 1rem;
  background: var(--bg-panel);
}
.detail-gallery-thumbs { display: grid; grid-template-columns: repeat(4, 1fr); gap: 0.6rem; }
.detail-gallery-thumbs .thumb {
  aspect-ratio: 1;
  border-radius: var(--radius-sm);
  overflow: hidden;
  border: 1px solid var(--border-soft);
  cursor: pointer;
  transition: all var(--transition);
}
.detail-gallery-thumbs .thumb.active { border-color: var(--accent); box-shadow: 0 0 0 2px var(--accent-glow); }
.detail-title { font-size: clamp(1.6rem, 3.5vw, 2.2rem); font-weight: 700; margin-bottom: 0.8rem; line-height: 1.3; }
.detail-cat { color: var(--accent); font-family: 'Orbitron', sans-serif; font-size: 0.82rem; letter-spacing: 0.15em; margin-bottom: 0.6rem; }
.detail-meta { display: flex; align-items: center; gap: 1rem; margin-bottom: 1.5rem; color: var(--text-sub); font-size: 0.9rem; }
.detail-price-wrap {
  padding: 1.4rem 1.6rem;
  background: linear-gradient(135deg, rgba(0, 212, 255, 0.1), rgba(26, 58, 143, 0.1));
  border: 1px solid var(--border-neon);
  border-radius: var(--radius-md);
  margin-bottom: 1.6rem;
  display: flex;
  align-items: baseline;
  gap: 1rem;
}
.detail-price {
  font-family: 'Orbitron', sans-serif;
  font-size: 2.4rem;
  font-weight: 800;
  color: var(--accent);
}
.detail-price-old {
  font-size: 1rem;
  color: var(--text-dim);
  text-decoration: line-through;
}
.detail-price-save {
  margin-left: auto;
  padding: 0.35rem 0.8rem;
  background: rgba(0, 212, 255, 0.15);
  border-radius: 999px;
  color: var(--accent);
  font-size: 0.85rem;
}
.detail-desc { color: var(--text-sub); line-height: 1.85; margin-bottom: 2rem; }
.detail-features { margin-bottom: 2rem; }
.detail-features li {
  list-style: none;
  padding: 0.55rem 0 0.55rem 1.8rem;
  position: relative;
  color: var(--text-main);
  font-size: 0.94rem;
}
.detail-features li::before {
  content: '✓';
  position: absolute;
  left: 0;
  top: 0.55rem;
  width: 22px; height: 22px;
  background: var(--gradient-main);
  color: #fff;
  border-radius: 50%;
  display: grid;
  place-items: center;
  font-size: 0.75rem;
}
.detail-actions { display: flex; gap: 0.8rem; flex-wrap: wrap; }
.qty-wrap {
  display: inline-flex;
  align-items: center;
  border: 1px solid var(--border-soft);
  border-radius: 999px;
  overflow: hidden;
}
.qty-btn {
  width: 40px; height: 42px;
  display: grid; place-items: center;
  color: var(--text-sub);
  transition: all var(--transition);
}
.qty-btn:hover { background: rgba(0, 212, 255, 0.1); color: var(--accent); }
.qty-val {
  min-width: 50px;
  text-align: center;
  font-family: 'Orbitron', sans-serif;
  font-weight: 600;
}

/* 响应式 */
@media (max-width: 960px) {
  .hero-inner { grid-template-columns: 1fr; gap: 2.5rem; }
  .hero-visual { max-width: 380px; justify-self: center; }
  .two-col { grid-template-columns: 1fr; }
  .detail-hero { grid-template-columns: 1fr; gap: 2rem; }
  .detail-gallery { position: static; }
  .footer-grid { grid-template-columns: 1fr 1fr; gap: 2rem; }
}

@media (max-width: 720px) {
  .nav-links {
    position: fixed;
    top: 64px;
    left: 0; right: 0;
    flex-direction: column;
    gap: 0;
    background: rgba(5, 11, 30, 0.98);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border-soft);
    padding: 1.2rem 1.6rem 2rem;
    transform: translateY(-120%);
    transition: transform var(--transition);
  }
  .nav.open .nav-links { transform: translateY(0); }
  .nav-links li { border-bottom: 1px solid var(--border-soft); }
  .nav-links li:last-child { border-bottom: none; }
  .nav-links a { display: block; padding: 1rem 0; }
  .nav-burger { display: block; }
  .nav-cta { display: none; }
  .hero-stats { grid-template-columns: 1fr; }
  .form-row { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; }
  .chat-panel { width: calc(100vw - 32px); right: 16px; }
  .chat-fab { right: 16px; bottom: 88px; }
  .back-top { right: 16px; bottom: 16px; }
}

/* 进场动画 */
.reveal {
  opacity: 0;
  transform: translateY(30px);
  transition: all 0.7s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}
.reveal.active { opacity: 1; transform: translateY(0); }