/* ============================================
   杭州先验科技有限公司 - 官网样式
   ============================================ */

:root {
  --bg-primary: #0A1628;
  --bg-secondary: #1E3A8A;
  --accent-start: #00D4FF;
  --accent-end: #4A5BFF;
  --text-primary: #FFFFFF;
  --text-secondary: #E2E8F0;
  --text-dark: #1A202C;
  --text-muted: #4A5568;
  --glass-bg: rgba(30, 58, 138, 0.25);
  --glass-border: rgba(255, 255, 255, 0.1);
  --shadow: 0 8px 32px rgba(0, 0, 0, 0.3);
  --shadow-hover: 0 16px 48px rgba(74, 91, 255, 0.25);
  --transition: 300ms ease-out;
  --ease-smooth: cubic-bezier(0.4, 0, 0.2, 1);
  --section-gap: 100px;
  --container-max: 1200px;
  --header-height: 72px;
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: "Inter", "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
  font-size: 16px;
  line-height: 1.6;
  color: var(--text-primary);
  background: var(--bg-primary);
  overflow-x: hidden;
}

a {
  color: inherit;
  text-decoration: none;
}

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

ul {
  list-style: none;
}

.container {
  width: 100%;
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 24px;
}

/* ---- Typography ---- */
.gradient-text {
  background: linear-gradient(135deg, var(--accent-start), var(--accent-end));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.section-label {
  display: inline-block;
  font-size: 14px;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--accent-start);
  margin-bottom: 12px;
}

.section-title {
  font-size: clamp(32px, 5vw, 48px);
  font-weight: 700;
  line-height: 1.2;
  margin-bottom: 16px;
}

.section-desc {
  font-size: 18px;
  color: var(--text-secondary);
  max-width: 640px;
}

/* ---- Buttons ---- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 14px 28px;
  font-size: 16px;
  font-weight: 600;
  border-radius: 8px;
  border: none;
  cursor: pointer;
  transition: transform var(--transition), box-shadow var(--transition), filter var(--transition);
}

.btn-primary {
  background: linear-gradient(135deg, var(--accent-start), var(--accent-end));
  color: var(--text-primary);
  box-shadow: 0 4px 20px rgba(74, 91, 255, 0.4);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 32px rgba(74, 91, 255, 0.5);
  filter: brightness(1.1);
}

.btn-outline {
  background: transparent;
  color: var(--text-primary);
  border: 1px solid rgba(255, 255, 255, 0.3);
}

.btn-outline:hover {
  transform: translateY(-2px);
  border-color: var(--accent-start);
  background: rgba(0, 212, 255, 0.08);
}

.btn-sm {
  padding: 10px 20px;
  font-size: 14px;
}

/* ---- Header ---- */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  height: var(--header-height);
  background: rgba(10, 22, 40, 0.85);
  backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--glass-border);
  transition: background var(--transition);
}

.header.scrolled {
  background: rgba(10, 22, 40, 0.95);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
}

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  font-size: 18px;
}

.logo-icon {
  width: 36px;
  height: 36px;
  background: linear-gradient(135deg, var(--accent-start), var(--accent-end));
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.logo-icon svg {
  width: 20px;
  height: 20px;
}

.nav {
  display: flex;
  align-items: center;
  gap: 36px;
}

.nav-link {
  font-size: 15px;
  color: var(--text-secondary);
  transition: color var(--transition);
  position: relative;
}

.nav-link:hover,
.nav-link.active {
  color: var(--text-primary);
}

.nav-link.active::after {
  content: "";
  position: absolute;
  bottom: -4px;
  left: 0;
  right: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--accent-start), var(--accent-end));
  border-radius: 1px;
}

.header-cta {
  display: flex;
  align-items: center;
  gap: 16px;
}

.hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px;
}

.hamburger span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--text-primary);
  transition: transform var(--transition), opacity var(--transition);
}

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

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

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

.mobile-nav {
  display: none;
  position: fixed;
  top: var(--header-height);
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(10, 22, 40, 0.98);
  backdrop-filter: blur(20px);
  padding: 32px 24px;
  flex-direction: column;
  gap: 8px;
  z-index: 999;
}

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

.mobile-nav .nav-link {
  font-size: 20px;
  padding: 16px 0;
  border-bottom: 1px solid var(--glass-border);
}

/* ---- Hero ---- */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  background: linear-gradient(160deg, #0A1628 0%, #1E3A8A 50%, #4A5BFF 100%);
  overflow: hidden;
  padding-top: var(--header-height);
}

.hero-canvas {
  position: absolute;
  inset: 0;
  pointer-events: none;
}

.hero-glow {
  position: absolute;
  width: 200px;
  height: 200px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(0, 212, 255, 0.15) 0%, transparent 70%);
  pointer-events: none;
  transform: translate(-50%, -50%);
  transition: opacity 0.3s;
  opacity: 0;
  z-index: 1;
}

.hero-glow.active {
  opacity: 1;
}

.hero-particles {
  position: absolute;
  inset: 0;
  overflow: hidden;
}

.particle {
  position: absolute;
  width: 4px;
  height: 4px;
  background: rgba(0, 212, 255, 0.6);
  border-radius: 50%;
  animation: float-particle 8s infinite ease-in-out;
}

@keyframes float-particle {
  0%, 100% { transform: translateY(0) scale(1); opacity: 0.3; }
  50% { transform: translateY(-30px) scale(1.2); opacity: 0.8; }
}

.hero-lines {
  position: absolute;
  inset: 0;
  opacity: 0.15;
}

.hero-lines svg {
  width: 100%;
  height: 100%;
}

.hero-content {
  position: relative;
  z-index: 2;
  max-width: 720px;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 16px;
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: 100px;
  font-size: 14px;
  color: var(--accent-start);
  margin-bottom: 24px;
  backdrop-filter: blur(8px);
}

.hero-title {
  font-size: clamp(40px, 6vw, 64px);
  font-weight: 700;
  line-height: 1.15;
  margin-bottom: 20px;
}

.hero-subtitle {
  font-size: clamp(16px, 2.5vw, 22px);
  color: var(--text-secondary);
  margin-bottom: 40px;
  letter-spacing: 0.05em;
}

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

.hero-stats {
  display: flex;
  gap: 48px;
  margin-top: 64px;
  padding-top: 32px;
  border-top: 1px solid var(--glass-border);
}

.hero-stat-value {
  font-size: 32px;
  font-weight: 700;
  color: var(--accent-start);
}

.hero-stat-label {
  font-size: 14px;
  color: var(--text-secondary);
  margin-top: 4px;
}

/* ---- Sections ---- */
.section {
  padding: var(--section-gap) 0;
}

.section-dark {
  background: var(--bg-primary);
}

.section-gradient {
  background: linear-gradient(180deg, var(--bg-primary) 0%, rgba(30, 58, 138, 0.3) 100%);
}

.section-header {
  text-align: center;
  margin-bottom: 64px;
}

.section-header .section-desc {
  margin: 0 auto;
}

/* ---- Glass Cards ---- */
.card-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.card {
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: 16px;
  padding: 32px;
  backdrop-filter: blur(12px);
  transition: transform var(--transition), box-shadow var(--transition);
}

.card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-hover);
}

.card-icon {
  width: 48px;
  height: 48px;
  margin-bottom: 20px;
  color: var(--accent-start);
}

.card-title {
  font-size: 22px;
  font-weight: 700;
  margin-bottom: 12px;
}

.card-desc {
  font-size: 15px;
  color: var(--text-secondary);
  line-height: 1.7;
}

/* ---- Trust Section ---- */
.trust-section {
  background: linear-gradient(180deg, rgba(30, 58, 138, 0.2) 0%, var(--bg-primary) 100%);
}

.trust-stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
  margin-bottom: 64px;
}

.trust-stat {
  text-align: center;
  padding: 32px;
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: 16px;
  backdrop-filter: blur(12px);
}

.trust-stat-value {
  font-size: 48px;
  font-weight: 700;
  background: linear-gradient(135deg, var(--accent-start), var(--accent-end));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.trust-stat-label {
  font-size: 16px;
  color: var(--text-secondary);
  margin-top: 8px;
}

.trust-badge {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
  margin-bottom: 48px;
  padding: 16px 24px;
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: 12px;
  max-width: 400px;
  margin-left: auto;
  margin-right: auto;
}

.trust-badge svg {
  width: 32px;
  height: 32px;
  color: var(--accent-start);
}

.partner-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}

.partner-logo {
  display: flex;
  align-items: center;
  justify-content: center;
  height: 80px;
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: 12px;
  font-size: 18px;
  font-weight: 600;
  color: rgba(255, 255, 255, 0.4);
  filter: grayscale(100%);
  transition: filter var(--transition), color var(--transition), transform var(--transition);
}

.partner-logo:hover {
  filter: grayscale(0%);
  color: var(--text-primary);
  transform: scale(1.02);
}

/* ---- Page Hero (inner pages) ---- */
.page-hero {
  padding: calc(var(--header-height) + 80px) 0 80px;
  background: linear-gradient(160deg, #0A1628 0%, #1E3A8A 60%, #2D3A8A 100%);
  text-align: center;
}

.page-hero .section-desc {
  margin: 0 auto;
}

/* ---- Services Detail ---- */
.service-detail {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  align-items: start;
  margin-bottom: 64px;
}

.service-list {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.service-item {
  display: flex;
  gap: 16px;
  padding: 20px;
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: 12px;
  backdrop-filter: blur(8px);
}

.service-item-icon {
  flex-shrink: 0;
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, rgba(0, 212, 255, 0.2), rgba(74, 91, 255, 0.2));
  border-radius: 8px;
  color: var(--accent-start);
}

.service-item h4 {
  font-size: 16px;
  font-weight: 600;
  margin-bottom: 4px;
}

.service-item p {
  font-size: 14px;
  color: var(--text-secondary);
}

/* ---- Process Steps ---- */
.process-steps {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 16px;
  margin: 64px 0;
}

.process-step {
  text-align: center;
  position: relative;
}

.process-step::after {
  content: "";
  position: absolute;
  top: 28px;
  right: -8px;
  width: calc(100% - 56px);
  height: 2px;
  background: linear-gradient(90deg, var(--accent-start), transparent);
  transform: translateX(50%);
}

.process-step:last-child::after {
  display: none;
}

.process-num {
  width: 56px;
  height: 56px;
  margin: 0 auto 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 20px;
  font-weight: 700;
  background: linear-gradient(135deg, var(--accent-start), var(--accent-end));
  border-radius: 50%;
}

.process-step h4 {
  font-size: 15px;
  font-weight: 600;
  margin-bottom: 8px;
}

.process-step p {
  font-size: 13px;
  color: var(--text-secondary);
}

/* ---- Advantages ---- */
.advantage-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.advantage-card {
  padding: 28px;
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: 16px;
  text-align: center;
}

.advantage-card .card-icon {
  margin: 0 auto 16px;
}

/* ---- Contact ---- */
.contact-layout {
  display: grid;
  grid-template-columns: 1fr 1.2fr;
  gap: 48px;
}

.contact-info {
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.contact-item {
  display: flex;
  gap: 16px;
  padding: 24px;
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: 12px;
}

.contact-item-icon {
  flex-shrink: 0;
  width: 44px;
  height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, rgba(0, 212, 255, 0.2), rgba(74, 91, 255, 0.2));
  border-radius: 10px;
  color: var(--accent-start);
}

.contact-item h4 {
  font-size: 14px;
  color: var(--text-secondary);
  margin-bottom: 4px;
}

.contact-item p {
  font-size: 16px;
  font-weight: 500;
}

.contact-form {
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: 16px;
  padding: 40px;
  backdrop-filter: blur(12px);
}

.form-title {
  font-size: 24px;
  font-weight: 700;
  margin-bottom: 8px;
}

.form-subtitle {
  font-size: 14px;
  color: var(--text-secondary);
  margin-bottom: 32px;
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

.form-group {
  margin-bottom: 20px;
}

.form-group label {
  display: block;
  font-size: 14px;
  font-weight: 500;
  margin-bottom: 8px;
  color: var(--text-secondary);
}

.form-group label .required {
  color: #FF6B6B;
}

.form-group input,
.form-group textarea {
  width: 100%;
  padding: 12px 16px;
  font-size: 15px;
  font-family: inherit;
  color: var(--text-primary);
  background: rgba(10, 22, 40, 0.6);
  border: 1px solid var(--glass-border);
  border-radius: 8px;
  transition: border-color var(--transition), box-shadow var(--transition);
}

.form-group input:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--accent-start);
  box-shadow: 0 0 0 3px rgba(0, 212, 255, 0.15);
}

.form-group input.error,
.form-group textarea.error {
  border-color: #FF6B6B;
  box-shadow: 0 0 0 3px rgba(255, 107, 107, 0.15);
}

.form-group .error-msg {
  font-size: 13px;
  color: #FF6B6B;
  margin-top: 6px;
  display: none;
}

.form-group .error-msg.show {
  display: block;
}

.form-group textarea {
  resize: vertical;
  min-height: 120px;
}

.form-submit {
  width: 100%;
  margin-top: 8px;
}

.form-submit:disabled {
  opacity: 0.6;
  cursor: not-allowed;
}

.form-success,
.form-error {
  display: none;
  padding: 16px;
  border-radius: 8px;
  margin-top: 16px;
  font-size: 14px;
  text-align: center;
}

.form-success {
  background: rgba(0, 212, 255, 0.1);
  border: 1px solid rgba(0, 212, 255, 0.3);
  color: var(--accent-start);
}

.form-error {
  background: rgba(255, 107, 107, 0.1);
  border: 1px solid rgba(255, 107, 107, 0.3);
  color: #FF6B6B;
}

.form-success.show,
.form-error.show {
  display: block;
}

.loading-spinner {
  display: inline-block;
  width: 18px;
  height: 18px;
  border: 2px solid rgba(255, 255, 255, 0.3);
  border-top-color: #fff;
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

/* ---- CTA Banner ---- */
.cta-banner {
  text-align: center;
  padding: 80px 48px;
  background: linear-gradient(135deg, rgba(30, 58, 138, 0.5), rgba(74, 91, 255, 0.3));
  border: 1px solid var(--glass-border);
  border-radius: 24px;
  margin: 64px 0;
}

.cta-banner h2 {
  font-size: clamp(28px, 4vw, 40px);
  margin-bottom: 16px;
}

.cta-banner p {
  color: var(--text-secondary);
  margin-bottom: 32px;
  font-size: 18px;
}

/* ---- Footer ---- */
.footer {
  background: rgba(10, 22, 40, 0.95);
  border-top: 1px solid var(--glass-border);
  padding: 64px 0 32px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: 48px;
  margin-bottom: 48px;
}

.footer-brand p {
  color: var(--text-secondary);
  font-size: 14px;
  margin-top: 16px;
  max-width: 320px;
}

.footer-col h4 {
  font-size: 15px;
  font-weight: 600;
  margin-bottom: 20px;
}

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

.footer-col ul li a {
  font-size: 14px;
  color: var(--text-secondary);
  transition: color var(--transition);
}

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

.footer-bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-top: 32px;
  border-top: 1px solid var(--glass-border);
  font-size: 13px;
  color: var(--text-secondary);
}

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

.footer-icp:hover {
  color: var(--accent-start);
}

/* ---- Scroll Animation ---- */
.fade-in {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 500ms var(--ease-smooth), transform 500ms var(--ease-smooth);
}

.fade-in.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ---- Responsive ---- */
@media (max-width: 1023px) {
  .card-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .partner-grid {
    grid-template-columns: repeat(3, 1fr);
  }

  .process-steps {
    grid-template-columns: repeat(3, 1fr);
  }

  .process-step::after {
    display: none;
  }

  .service-detail {
    grid-template-columns: 1fr;
  }

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

@media (max-width: 767px) {
  :root {
    --section-gap: 64px;
  }

  .nav,
  .header-cta .btn-outline {
    display: none;
  }

  .hamburger {
    display: flex;
  }

  .hero-content {
    text-align: center;
  }

  .hero-actions {
    justify-content: center;
  }

  .hero-stats {
    justify-content: center;
    gap: 32px;
    flex-wrap: wrap;
  }

  .card-grid,
  .trust-stats,
  .advantage-grid {
    grid-template-columns: 1fr;
  }

  .partner-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .process-steps {
    grid-template-columns: 1fr;
    gap: 24px;
  }

  .contact-layout {
    grid-template-columns: 1fr;
  }

  .form-row {
    grid-template-columns: 1fr;
  }

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

  .footer-bottom {
    flex-direction: column;
    gap: 12px;
    text-align: center;
  }

  .hero-glow {
    display: none;
  }
}