/* 广州鲸游星驱科技官网 - 科技感单页样式 */
/* 设计参考：深色底、冷色高亮、清晰层级、适度动效 */

:root {
  --bg-dark: #0a0a0f;
  --bg-card: #111118;
  --text-primary: #f0f0f5;
  --text-secondary: #a0a0b0;
  --accent-start: #3b82f6;
  --accent-end: #8b5cf6;
  --accent-glow: rgba(59, 130, 246, 0.15);
  --border-subtle: rgba(255, 255, 255, 0.08);
  --font-sans: 'Inter', 'Noto Sans SC', system-ui, sans-serif;
  --space-unit: 1rem;
  --container-max: 960px;
  --section-padding: clamp(3rem, 8vw, 5rem);
}

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

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: var(--font-sans);
  font-size: 1rem;
  line-height: 1.6;
  color: var(--text-primary);
  background-color: var(--bg-dark);
  -webkit-font-smoothing: antialiased;
  position: relative;
}

/* 全站固定波浪背景（TRAE 风格滚动） */
.site-waves {
  position: fixed;
  inset: 0;
  z-index: -1;
  pointer-events: none;
  overflow: hidden;
}

.site-waves .wave-svg {
  position: absolute;
  bottom: 0;
  left: 0;
  width: 200%;
  height: 35%;
  min-height: 160px;
  fill: none;
  stroke-linecap: round;
}

.site-waves .wave-svg-1 .wave-path {
  fill: rgba(59, 130, 246, 0.08);
  stroke: rgba(59, 130, 246, 0.06);
  stroke-width: 0.5;
}

.site-waves .wave-svg-2 .wave-path {
  fill: rgba(139, 92, 246, 0.06);
  stroke: rgba(139, 92, 246, 0.05);
  stroke-width: 0.5;
}

.site-waves .wave-svg-3 .wave-path {
  fill: rgba(59, 130, 246, 0.04);
  stroke: rgba(255, 255, 255, 0.025);
  stroke-width: 0.5;
}

.site-waves .wave-svg {
  will-change: transform;
}

.site-waves .wave-svg-1 {
  animation: wave-roll 24s linear infinite;
}

.site-waves .wave-svg-2 {
  animation: wave-roll 30s linear infinite reverse;
}

.site-waves .wave-svg-3 {
  animation: wave-roll 36s linear infinite;
}

@media (prefers-reduced-motion: reduce) {
  .site-waves .wave-svg-1,
  .site-waves .wave-svg-2,
  .site-waves .wave-svg-3 {
    animation: none;
  }
}

/* ----- 右侧圆点导航 ----- */
.nav-dots {
  position: fixed;
  top: 50%;
  right: 1.5rem;
  z-index: 100;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  transform: translateY(-50%);
}

.nav-dot {
  display: block;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.25);
  border: 2px solid transparent;
  text-indent: -9999px;
  overflow: hidden;
  transition: background 0.2s, transform 0.2s, border-color 0.2s;
}

.nav-dot:hover {
  background: rgba(255, 255, 255, 0.5);
  transform: scale(1.2);
}

.nav-dot:focus-visible {
  outline: 2px solid var(--accent-start);
  outline-offset: 2px;
  background: rgba(255, 255, 255, 0.5);
}

.nav-dot.active {
  background: var(--accent-start);
  border-color: rgba(255, 255, 255, 0.3);
  transform: scale(1.25);
}

.btn:focus-visible,
.contact-link:focus-visible {
  outline: 2px solid var(--accent-start);
  outline-offset: 2px;
  border-radius: 2px;
}

/* ----- 语言切换 ----- */
.lang-switcher {
  position: fixed;
  top: 1.25rem;
  right: 4rem;
  z-index: 101;
  display: flex;
  align-items: center;
  gap: 0.25rem;
}

.lang-btn {
  font-family: var(--font-sans);
  font-size: 0.875rem;
  color: var(--text-secondary);
  background: none;
  border: none;
  padding: 0.25rem 0.5rem;
  cursor: pointer;
  border-radius: 4px;
  transition: color 0.2s, background 0.2s;
}

.lang-btn:hover {
  color: var(--text-primary);
}

.lang-btn.active {
  color: var(--accent-start);
  font-weight: 600;
}

.lang-btn:focus-visible {
  outline: 2px solid var(--accent-start);
  outline-offset: 2px;
}

.lang-sep {
  color: var(--text-secondary);
  font-size: 0.875rem;
}

@media (max-width: 640px) {
  .lang-switcher {
    right: 3rem;
    top: 1rem;
  }
}

.skip-link {
  position: absolute;
  top: -3rem;
  left: 1rem;
  padding: 0.5rem 1rem;
  background: var(--accent-start);
  color: var(--bg-dark);
  text-decoration: none;
  font-weight: 600;
  z-index: 200;
  border-radius: 6px;
  transition: top 0.2s;
}

.skip-link:focus {
  top: 1rem;
  outline: 2px solid var(--text-primary);
  outline-offset: 2px;
}

.footer-sep {
  color: var(--text-secondary);
}

/* ----- Hero ----- */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 6rem 1.5rem 4rem;
  overflow: hidden;
}

/* 波浪滚动背景层（TRAE 风格） */
.hero-waves {
  position: absolute;
  inset: 0;
  z-index: 2;
  pointer-events: none;
  overflow: hidden;
}

.wave-svg {
  position: absolute;
  bottom: 0;
  left: 0;
  width: 200%;
  height: 40%;
  min-height: 180px;
  fill: none;
  stroke-linecap: round;
}

.wave-svg-1 .wave-path {
  fill: rgba(59, 130, 246, 0.09);
  stroke: rgba(59, 130, 246, 0.07);
  stroke-width: 0.5;
}

.wave-svg-2 .wave-path {
  fill: rgba(139, 92, 246, 0.06);
  stroke: rgba(139, 92, 246, 0.05);
  stroke-width: 0.5;
}

.wave-svg-3 .wave-path {
  fill: rgba(59, 130, 246, 0.04);
  stroke: rgba(255, 255, 255, 0.03);
  stroke-width: 0.5;
}

.hero-waves .wave-svg {
  will-change: transform;
}

.wave-svg-1 {
  animation: wave-roll 22s linear infinite;
}

.wave-svg-2 {
  animation: wave-roll 28s linear infinite reverse;
}

.wave-svg-3 {
  animation: wave-roll 34s linear infinite;
}

@media (prefers-reduced-motion: reduce) {
  .wave-svg-1,
  .wave-svg-2,
  .wave-svg-3 {
    animation: none;
  }
}

@keyframes wave-roll {
  0% { transform: translateX(0); }
  100% { transform: translateX(-50%); }
}

.hero-bg {
  position: absolute;
  inset: 0;
  z-index: 1;
  background:
    radial-gradient(ellipse 80% 50% at 50% 20%, var(--accent-glow) 0%, transparent 50%),
    linear-gradient(180deg, var(--bg-dark) 0%, #0d0d14 100%);
  pointer-events: none;
}

.hero-bg::after {
  content: '';
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(255,255,255,0.02) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,0.02) 1px, transparent 1px);
  background-size: 60px 60px;
  pointer-events: none;
}

.hero-content {
  position: relative;
  z-index: 3;
  text-align: center;
  max-width: 640px;
}

.hero-title {
  margin: 0 0 0.5rem;
  font-size: clamp(2rem, 5vw, 3rem);
  font-weight: 700;
  letter-spacing: -0.02em;
  background: linear-gradient(135deg, var(--text-primary) 0%, var(--text-secondary) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-subtitle {
  margin: 0 0 1.5rem;
  font-size: 1.1rem;
  color: var(--text-secondary);
  font-weight: 500;
}

.hero-desc {
  margin: 0 0 2rem;
  font-size: 1rem;
  color: var(--text-secondary);
  line-height: 1.7;
}

.btn {
  display: inline-block;
  padding: 0.75rem 1.5rem;
  font-family: inherit;
  font-size: 0.95rem;
  font-weight: 600;
  text-decoration: none;
  border-radius: 8px;
  transition: opacity 0.2s, transform 0.2s;
}

.btn-primary {
  color: var(--bg-dark);
  background: linear-gradient(135deg, var(--accent-start), var(--accent-end));
}

.btn-primary:hover {
  opacity: 0.9;
  transform: translateY(-1px);
}

/* ----- Container ----- */
.container {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 1.5rem;
}

/* ----- Section common ----- */
section {
  padding: var(--section-padding) 0;
}

.section-title {
  margin: 0 0 1.5rem;
  font-size: clamp(1.5rem, 3vw, 2rem);
  font-weight: 700;
  text-align: center;
  color: var(--text-primary);
}

/* ----- About ----- */
.about {
  background: linear-gradient(180deg, transparent 0%, rgba(17, 17, 24, 0.6) 100%);
}

.company-name-zh {
  margin: 0 0 0.25rem;
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--text-primary);
}

.company-name-en {
  margin: 0 0 1.5rem;
  font-size: 0.95rem;
  color: var(--text-secondary);
}

.about-intro {
  margin: 0 auto;
  max-width: 560px;
  color: var(--text-secondary);
  text-align: center;
}

/* ----- Products ----- */
.products {
  background: var(--bg-card);
}

.product-cards {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 1.5rem;
  justify-items: center;
  max-width: 720px;
  margin: 0 auto;
}

.product-card {
  width: 100%;
  max-width: 340px;
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--border-subtle);
  border-radius: 12px;
  padding: 1.5rem;
  transition: border-color 0.2s, box-shadow 0.2s;
}

.product-card:hover {
  border-color: rgba(59, 130, 246, 0.3);
  box-shadow: 0 0 24px var(--accent-glow);
}

.product-card-inner {
  text-align: center;
}

.product-icon {
  width: 64px;
  height: 64px;
  margin: 0 auto 1rem;
  border-radius: 16px;
  background: linear-gradient(135deg, var(--accent-start), var(--accent-end));
  opacity: 0.9;
}

.product-name {
  margin: 0 0 0.5rem;
  font-size: 1.15rem;
  font-weight: 600;
  color: var(--text-primary);
}

.product-desc {
  margin: 0 0 1rem;
  font-size: 0.9rem;
  color: var(--text-secondary);
}

.product-actions {
  display: flex;
  justify-content: center;
  gap: 0.75rem;
}

.product-cta {
  display: inline-block;
  padding: 0.5rem 1rem;
  font-size: 0.9rem;
  font-weight: 500;
  border-radius: 6px;
  background: rgba(255, 255, 255, 0.06);
  color: var(--text-secondary);
}

.product-cta:not(.product-cta-disabled) {
  color: var(--accent-start);
  text-decoration: none;
  transition: background 0.2s, color 0.2s;
}

.product-cta:not(.product-cta-disabled):hover {
  background: rgba(59, 130, 246, 0.15);
  color: var(--text-primary);
}

/* ----- Contact ----- */
.contact {
  background: linear-gradient(180deg, var(--bg-card) 0%, var(--bg-dark) 100%);
}

.contact-block {
  margin: 0 auto;
  max-width: 480px;
  font-style: normal;
  text-align: center;
}

.contact-company {
  margin: 0 0 1rem;
  font-weight: 600;
  color: var(--text-primary);
}

.contact-item {
  margin: 0 0 0.75rem;
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  justify-content: center;
  align-items: center;
}

.contact-icon {
  flex: 0 0 auto;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  color: var(--text-secondary);
}

.contact-icon svg {
  display: block;
}

.contact-value {
  color: var(--text-primary);
}

#contact-address {
  white-space: nowrap;
}

.contact-link {
  color: var(--accent-start);
  text-decoration: none;
}

.contact-link:hover {
  text-decoration: underline;
}

.contact-note {
  margin: 0;
  font-size: 0.85rem;
  color: var(--text-secondary);
  max-width: 480px;
  margin-left: auto;
  margin-right: auto;
}

/* ----- Footer ----- */
.site-footer {
  padding: 2rem 1.5rem;
  border-top: 1px solid var(--border-subtle);
  text-align: center;
}

.footer-legal {
  margin: 0 0 0.5rem;
  font-size: 0.9rem;
  color: var(--text-secondary);
}

.footer-links a {
  color: var(--text-secondary);
  text-decoration: none;
}

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

/* ----- Responsive ----- */
@media (max-width: 640px) {
  .nav-dots {
    right: 1rem;
    gap: 0.5rem;
  }

  .nav-dot {
    width: 10px;
    height: 10px;
  }

  .product-cards {
    grid-template-columns: 1fr;
  }

  .contact-item {
    flex-direction: row;
    justify-content: center;
  }
}