/* ============================================
   安心大神报单 — 全局样式（浅色/深色双主题）
   ============================================ */

/* ===== Dark Theme (default) ===== */
:root {
  --primary: #6366f1;
  --primary-light: #818cf8;
  --primary-dark: #4f46e5;
  --primary-rgb: 99, 102, 241;
  --secondary: #8b5cf6;
  --secondary-rgb: 139, 92, 246;
  --accent: #f43f5e;
  --success: #10b981;
  --warning: #f59e0b;
  --danger: #ef4444;

  --bg: #0a0a0f;
  --bg-raised: #12121a;
  --bg-card: rgba(255,255,255,0.03);
  --bg-card-hover: rgba(255,255,255,0.06);
  --border: rgba(255,255,255,0.07);
  --border-hover: rgba(255,255,255,0.14);

  --text: #f1f5f9;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;

  --navbar-bg: rgba(10, 10, 15, 0.85);
  --mobile-menu-bg: rgba(10,10,15,0.95);
  --section-alt: rgba(255,255,255,0.01);

  --shadow-sm: 0 2px 8px rgba(0,0,0,0.15);
  --shadow: 0 4px 24px rgba(0,0,0,0.3);
  --shadow-lg: 0 8px 40px rgba(0,0,0,0.4);

  --radius: 16px;
  --radius-sm: 12px;
  --radius-xs: 8px;

  --font: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

/* ===== Light Theme ===== */
[data-theme="light"] {
  --bg: #f8f9fc;
  --bg-raised: #ffffff;
  --bg-card: rgba(255,255,255,0.8);
  --bg-card-hover: rgba(255,255,255,1);
  --border: rgba(0,0,0,0.08);
  --border-hover: rgba(0,0,0,0.15);

  --text: #1e293b;
  --text-secondary: #475569;
  --text-muted: #94a3b8;

  --navbar-bg: rgba(248, 249, 252, 0.88);
  --mobile-menu-bg: rgba(248,249,252,0.98);
  --section-alt: rgba(0,0,0,0.02);

  --shadow-sm: 0 2px 8px rgba(0,0,0,0.06);
  --shadow: 0 4px 24px rgba(0,0,0,0.08);
  --shadow-lg: 0 8px 40px rgba(0,0,0,0.12);
}

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

html {
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  overflow-x: hidden;
  transition: background var(--transition), color var(--transition);
}

a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }
button { cursor: pointer; font-family: inherit; border: none; background: none; color: inherit; }
input, textarea, select { font-family: inherit; }

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

.gradient-text {
  background: linear-gradient(135deg, var(--primary), var(--secondary), var(--accent));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* ===== Theme Toggle ===== */
.theme-toggle {
  position: relative;
  width: 52px;
  height: 28px;
  background: rgba(255,255,255,0.1);
  border-radius: 14px;
  border: 1px solid var(--border);
  cursor: pointer;
  transition: var(--transition);
  flex-shrink: 0;
}

[data-theme="light"] .theme-toggle {
  background: rgba(0,0,0,0.08);
}

.theme-toggle-inner {
  position: absolute;
  top: 3px;
  left: 3px;
  width: 20px;
  height: 20px;
  border-radius: 50%;
  background: var(--primary);
  transition: var(--transition);
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 2px 6px rgba(var(--primary-rgb), 0.4);
}

[data-theme="light"] .theme-toggle-inner {
  left: 27px;
  background: #f59e0b;
  box-shadow: 0 2px 6px rgba(245, 158, 11, 0.4);
}

.theme-toggle-inner svg {
  width: 12px;
  height: 12px;
  fill: #fff;
}

.theme-icon-moon { display: block; }
.theme-icon-sun { display: none; }
[data-theme="light"] .theme-icon-moon { display: none; }
[data-theme="light"] .theme-icon-sun { display: block; }

/* ===== Navbar ===== */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  padding: 16px 0;
  transition: var(--transition);
}

.navbar.scrolled {
  background: var(--navbar-bg);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border);
  padding: 12px 0;
}

.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

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

.nav-brand-logo {
  width: 36px;
  height: 36px;
  border-radius: 10px;
  object-fit: contain;
  /* === LOGO 图标地址 === */
  /* 请将下方 url() 中的地址替换为你的 logo 图片地址 */
  /* background: url('你的logo地址') center/contain no-repeat; */
  background: var(--primary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
  color: #fff;
  font-weight: 800;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 32px;
}

.nav-links a {
  font-size: 14px;
  font-weight: 500;
  color: var(--text-secondary);
  transition: var(--transition);
  position: relative;
}

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

.nav-links a::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--primary);
  transition: var(--transition);
  border-radius: 1px;
}

.nav-links a:hover::after { width: 100%; }

.nav-right {
  display: flex;
  align-items: center;
  gap: 16px;
}

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: 4px;
}

.nav-toggle span {
  width: 22px;
  height: 2px;
  background: var(--text);
  border-radius: 2px;
  transition: var(--transition);
}

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

.hero-bg {
  position: absolute;
  inset: 0;
  z-index: 0;
}

.hero-orb {
  position: absolute;
  border-radius: 50%;
  filter: blur(100px);
  opacity: 0.35;
  animation: float 20s ease-in-out infinite;
}

[data-theme="light"] .hero-orb {
  opacity: 0.18;
  filter: blur(120px);
}

.hero-orb-1 {
  width: 500px;
  height: 500px;
  background: var(--primary);
  top: -10%;
  right: -5%;
  animation-delay: 0s;
}

.hero-orb-2 {
  width: 400px;
  height: 400px;
  background: var(--secondary);
  bottom: -10%;
  left: -5%;
  animation-delay: -7s;
}

.hero-orb-3 {
  width: 300px;
  height: 300px;
  background: var(--accent);
  top: 40%;
  left: 50%;
  opacity: 0.2;
  animation-delay: -14s;
}

[data-theme="light"] .hero-orb-3 {
  opacity: 0.1;
}

#particleCanvas {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
}

@keyframes float {
  0%, 100% { transform: translate(0, 0) scale(1); }
  25% { transform: translate(30px, -30px) scale(1.05); }
  50% { transform: translate(-20px, 20px) scale(0.95); }
  75% { transform: translate(20px, 10px) scale(1.02); }
}

.hero-content {
  position: relative;
  z-index: 1;
  text-align: center;
  max-width: 760px;
  padding-top: 80px;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 18px;
  background: rgba(var(--primary-rgb), 0.12);
  border: 1px solid rgba(var(--primary-rgb), 0.2);
  border-radius: 100px;
  font-size: 13px;
  font-weight: 600;
  color: var(--primary-light);
  margin-bottom: 28px;
  backdrop-filter: blur(8px);
}

[data-theme="light"] .hero-badge {
  background: rgba(var(--primary-rgb), 0.08);
  border-color: rgba(var(--primary-rgb), 0.15);
  color: var(--primary-dark);
}

.hero-title {
  font-size: clamp(2.5rem, 6vw, 3.8rem);
  font-weight: 900;
  line-height: 1.12;
  letter-spacing: -0.03em;
  margin-bottom: 24px;
}

.hero-desc {
  font-size: 18px;
  color: var(--text-secondary);
  line-height: 1.75;
  margin-bottom: 40px;
  max-width: 580px;
  margin-left: auto;
  margin-right: auto;
}

.hero-actions {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 16px;
  margin-bottom: 56px;
  flex-wrap: wrap;
}

/* ===== Buttons ===== */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 14px 30px;
  border-radius: var(--radius-sm);
  font-size: 15px;
  font-weight: 600;
  transition: var(--transition);
  white-space: nowrap;
}

.btn-primary {
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  color: #fff;
  box-shadow: 0 4px 20px rgba(var(--primary-rgb), 0.35);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 32px rgba(var(--primary-rgb), 0.5);
}

.btn-outline {
  background: transparent;
  border: 1px solid var(--border-hover);
  color: var(--text-secondary);
}

.btn-outline:hover {
  border-color: var(--primary);
  color: var(--primary-light);
  background: rgba(var(--primary-rgb), 0.05);
}

.btn-lg { padding: 16px 36px; font-size: 16px; }

/* ===== Hero Stats ===== */
.hero-stats {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 40px;
  padding: 32px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  backdrop-filter: blur(12px);
  max-width: 560px;
  margin: 0 auto;
}

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

.hero-stat strong {
  display: block;
  font-size: 28px;
  font-weight: 900;
}

.hero-stat span {
  display: block;
  font-size: 12px;
  font-weight: 500;
  color: var(--text-muted);
  margin-top: 4px;
  letter-spacing: 0.02em;
}

.hero-stat-divider {
  width: 1px;
  height: 40px;
  background: var(--border);
}

.hero-scroll {
  position: absolute;
  bottom: 32px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 1;
}

.scroll-mouse {
  width: 24px;
  height: 38px;
  border: 2px solid var(--text-muted);
  border-radius: 12px;
  display: flex;
  justify-content: center;
  padding-top: 6px;
  opacity: 0.5;
}

.scroll-dot {
  width: 3px;
  height: 8px;
  background: var(--text-muted);
  border-radius: 2px;
  animation: scrollDot 2s ease-in-out infinite;
}

@keyframes scrollDot {
  0%, 100% { opacity: 1; transform: translateY(0); }
  50% { opacity: 0.3; transform: translateY(10px); }
}

/* ===== Sections ===== */
.section {
  padding: 110px 0;
  position: relative;
}

.section-alt {
  background: var(--section-alt);
}

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

.section-tag {
  display: inline-block;
  padding: 5px 16px;
  background: rgba(var(--primary-rgb), 0.08);
  border-radius: 100px;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.04em;
  color: var(--primary-light);
  margin-bottom: 16px;
  text-transform: uppercase;
}

[data-theme="light"] .section-tag {
  color: var(--primary-dark);
}

.section-title {
  font-size: clamp(1.8rem, 4vw, 2.6rem);
  font-weight: 900;
  letter-spacing: -0.02em;
  margin-bottom: 14px;
}

.section-desc {
  font-size: 17px;
  color: var(--text-secondary);
  max-width: 520px;
  margin: 0 auto;
  line-height: 1.7;
}

/* ===== Feature Grid ===== */
.feature-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.feature-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 36px 32px;
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}

.feature-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: linear-gradient(90deg, transparent, var(--c, var(--primary)), transparent);
  opacity: 0;
  transition: var(--transition);
}

.feature-card:hover {
  background: var(--bg-card-hover);
  border-color: var(--border-hover);
  transform: translateY(-6px);
  box-shadow: var(--shadow);
}

.feature-card:hover::before { opacity: 1; }

.feature-icon {
  width: 52px;
  height: 52px;
  border-radius: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 24px;
  margin-bottom: 22px;
  position: relative;
}

.feature-icon::after {
  content: '';
  position: absolute;
  inset: 0;
  border-radius: 14px;
  background: var(--c, var(--primary));
  opacity: 0.1;
}

.feature-card h3 {
  font-size: 18px;
  font-weight: 700;
  margin-bottom: 10px;
  letter-spacing: -0.01em;
}

.feature-card p {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.75;
}

/* ===== Stats Grid ===== */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}

.stat-card {
  text-align: center;
  padding: 44px 20px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  transition: var(--transition);
}

.stat-card:hover {
  background: var(--bg-card-hover);
  transform: translateY(-6px);
  box-shadow: var(--shadow);
}

.stat-number {
  font-size: 48px;
  font-weight: 900;
  line-height: 1;
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* 数字 + 后缀同行 */
.stat-value-row {
  display: flex;
  align-items: baseline;
  justify-content: center;
  gap: 4px;
  line-height: 1;
}

.stat-suffix {
  font-size: 20px;
  font-weight: 700;
  color: var(--secondary);
  /* 与数字底部对齐 */
  padding-bottom: 4px;
}

.stat-label {
  font-size: 14px;
  color: var(--text-secondary);
  margin-top: 12px;
  font-weight: 500;
}

/* ===== How It Works ===== */
.steps-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
  position: relative;
}

.steps-grid::before {
  content: '';
  position: absolute;
  top: 48px;
  left: calc(16.66% + 24px);
  right: calc(16.66% + 24px);
  height: 2px;
  background: linear-gradient(90deg, var(--primary), var(--secondary));
  opacity: 0.2;
}

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

.step-number {
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  color: #fff;
  font-size: 18px;
  font-weight: 800;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 20px;
  position: relative;
  z-index: 1;
  box-shadow: 0 4px 16px rgba(var(--primary-rgb), 0.3);
}

.step-card h3 {
  font-size: 18px;
  font-weight: 700;
  margin-bottom: 10px;
}

.step-card p {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.7;
  max-width: 260px;
  margin: 0 auto;
}

/* ===== FAQ ===== */
.faq-list {
  max-width: 700px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.faq-item {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  overflow: hidden;
  transition: var(--transition);
}

.faq-item.open {
  border-color: rgba(var(--primary-rgb), 0.3);
  background: var(--bg-card-hover);
  box-shadow: 0 2px 12px rgba(var(--primary-rgb), 0.08);
}

.faq-question {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 22px 24px;
  font-size: 15px;
  font-weight: 600;
  text-align: left;
  transition: var(--transition);
  gap: 16px;
}

.faq-question:hover { color: var(--primary-light); }

.faq-arrow {
  transition: var(--transition);
  flex-shrink: 0;
  color: var(--text-muted);
}

.faq-item.open .faq-arrow { transform: rotate(180deg); color: var(--primary-light); }

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.35s ease, padding 0.35s ease;
}

.faq-item.open .faq-answer {
  max-height: 300px;
}

.faq-answer p {
  padding: 0 24px 22px;
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.75;
}

/* ===== Contact / CTA ===== */
.cta-section {
  position: relative;
}

.cta-card {
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  border-radius: 24px;
  padding: 72px 48px;
  text-align: center;
  position: relative;
  overflow: hidden;
}

.cta-card::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(circle at 30% 50%, rgba(255,255,255,0.1) 0%, transparent 50%),
              radial-gradient(circle at 70% 80%, rgba(255,255,255,0.08) 0%, transparent 40%);
}

.cta-card h2 {
  font-size: clamp(1.6rem, 3.5vw, 2.2rem);
  font-weight: 900;
  color: #fff;
  margin-bottom: 16px;
  position: relative;
}

.cta-card p {
  font-size: 16px;
  color: rgba(255,255,255,0.8);
  margin-bottom: 36px;
  max-width: 480px;
  margin-left: auto;
  margin-right: auto;
  position: relative;
  line-height: 1.7;
}

.cta-actions {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 16px;
  position: relative;
  flex-wrap: wrap;
}

.btn-white {
  background: #fff;
  color: var(--primary-dark);
  font-weight: 700;
  box-shadow: 0 4px 20px rgba(0,0,0,0.15);
}

.btn-white:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 32px rgba(0,0,0,0.2);
}

.btn-white-outline {
  background: transparent;
  border: 1px solid rgba(255,255,255,0.3);
  color: #fff;
}

.btn-white-outline:hover {
  background: rgba(255,255,255,0.1);
  border-color: rgba(255,255,255,0.5);
}

.contact-info {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 40px;
  margin-top: 40px;
  position: relative;
  flex-wrap: wrap;
}

.contact-item {
  display: flex;
  align-items: center;
  gap: 10px;
  color: rgba(255,255,255,0.9);
  font-size: 14px;
  font-weight: 500;
}

.contact-item svg {
  width: 18px;
  height: 18px;
  opacity: 0.7;
}

/* ===== Footer ===== */
.footer {
  padding: 48px 0 32px;
  border-top: 1px solid var(--border);
}

.footer-inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 24px;
}

.footer-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
}

.footer-bottom {
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
}

.footer-brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  font-size: 15px;
}

.footer-logo {
  width: 28px;
  height: 28px;
  border-radius: 8px;
  /* === LOGO 图标地址（与导航栏保持一致）=== */
  /* background: url('你的logo地址') center/contain no-repeat; */
  background: var(--primary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 14px;
  color: #fff;
  font-weight: 800;
}

.footer-copy {
  font-size: 13px;
  color: var(--text-muted);
}

.footer-links {
  display: flex;
  gap: 24px;
}

.footer-links a {
  font-size: 13px;
  color: var(--text-muted);
  transition: var(--transition);
}

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

/* 备案号 */
.footer-icp {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 12px;
}

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

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

.icp-sep {
  color: var(--text-muted);
  opacity: 0.4;
}

/* ===== Back to Top ===== */
.back-to-top {
  position: fixed;
  bottom: 32px;
  right: 32px;
  width: 46px;
  height: 46px;
  background: var(--primary);
  color: #fff;
  border-radius: var(--radius-xs);
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  visibility: hidden;
  transform: translateY(10px);
  transition: var(--transition);
  z-index: 900;
  box-shadow: 0 4px 16px rgba(var(--primary-rgb), 0.35);
}

.back-to-top.show {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.back-to-top:hover {
  background: var(--primary-dark);
  transform: translateY(-2px);
}

/* ===== Fade-up Animation ===== */
.fade-up {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.6s ease, transform 0.6s ease;
  transition-delay: var(--delay, 0s);
}

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

/* ===== Theme Transition Overlay ===== */
.theme-transitioning * {
  transition: background-color 0.4s ease, color 0.3s ease, border-color 0.3s ease, box-shadow 0.3s ease !important;
}

/* ===== Responsive ===== */
@media (max-width: 1024px) {
  .feature-grid { grid-template-columns: repeat(2, 1fr); }
  .stats-grid { grid-template-columns: repeat(2, 1fr); }
  .steps-grid { grid-template-columns: repeat(3, 1fr); gap: 24px; }
  .steps-grid::before { display: none; }
}

@media (max-width: 768px) {
  .nav-links { display: none; }
  .nav-links.open {
    display: flex;
    flex-direction: column;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--mobile-menu-bg);
    backdrop-filter: blur(12px);
    padding: 20px 24px;
    gap: 16px;
    border-bottom: 1px solid var(--border);
  }
  .nav-right .nav-btn { display: none; }
  .nav-toggle { display: flex; }

  .feature-grid { grid-template-columns: 1fr; max-width: 420px; margin: 0 auto; }
  .stats-grid { grid-template-columns: repeat(2, 1fr); }
  .steps-grid { grid-template-columns: 1fr; max-width: 320px; margin: 0 auto; }
  .hero-stats { flex-direction: column; gap: 20px; }
  .hero-stat-divider { width: 40px; height: 1px; }
  .cta-card { padding: 48px 24px; }
  .contact-info { flex-direction: column; gap: 16px; }

  .footer-top {
    flex-direction: column;
    gap: 16px;
    text-align: center;
  }
  .footer-links { justify-content: center; }
}

@media (max-width: 480px) {
  .stats-grid { grid-template-columns: 1fr; }
  .hero-actions { flex-direction: column; width: 100%; }
  .hero-actions .btn { width: 100%; justify-content: center; }
  .section { padding: 72px 0; }
}