/* ============================================
   加拿大预测网 - SaaS Landing Page
   自定义样式表
   ============================================ */

/* ---------- CSS 变量 & 全局设置 ---------- */
:root {
  --color-primary: #4f46e5;
  --color-primary-dark: #4338ca;
  --color-primary-light: #818cf8;
  --color-primary-bg: #eef2ff;
  --color-dark: #1e293b;
  --color-gray: #64748b;
  --color-light: #f8fafc;
  --radius-lg: 1rem;
  --radius-xl: 1.25rem;
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.06), 0 1px 2px rgba(0, 0, 0, 0.04);
  --shadow-md: 0 4px 20px rgba(0, 0, 0, 0.08);
  --shadow-lg: 0 12px 40px rgba(0, 0, 0, 0.12);
  --transition-base: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

html {
  scroll-behavior: smooth;
  font-size: 16px;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC',
    'Microsoft YaHei', 'Helvetica Neue', Arial, sans-serif;
  color: var(--color-dark);
  line-height: 1.6;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* ---------- 自定义滚动条 ---------- */
::-webkit-scrollbar {
  width: 8px;
}

::-webkit-scrollbar-track {
  background: #f1f5f9;
}

::-webkit-scrollbar-thumb {
  background: #c7d2fe;
  border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
  background: #a5b4fc;
}

/* ---------- Navbar ---------- */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  padding: 1rem 0;
  transition: var(--transition-base);
}

.navbar.scrolled {
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  box-shadow: var(--shadow-sm);
  padding: 0.75rem 0;
}

.navbar .nav-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 1.5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.navbar .nav-logo {
  display: flex;
  align-items: center;
  gap: 0.625rem;
  text-decoration: none;
  color: var(--color-dark);
  font-weight: 700;
  font-size: 1.375rem;
  white-space: nowrap;
}

.navbar .nav-logo .logo-icon {
  width: 40px;
  height: 40px;
  background: linear-gradient(135deg, #4f46e5, #818cf8);
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-size: 1.25rem;
}

.navbar .nav-links {
  display: flex;
  align-items: center;
  gap: 2rem;
  list-style: none;
}

.navbar .nav-links a {
  text-decoration: none;
  color: #475569;
  font-weight: 500;
  font-size: 0.95rem;
  transition: var(--transition-base);
  position: relative;
}

.navbar .nav-links a::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--color-primary);
  border-radius: 1px;
  transition: width 0.3s ease;
}

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

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

.navbar .nav-links a.active {
  color: var(--color-primary);
}

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

.navbar .btn-nav {
  background: var(--color-primary);
  color: #fff !important;
  padding: 0.625rem 1.5rem;
  border-radius: 50px;
  font-weight: 600;
  transition: var(--transition-base);
  box-shadow: 0 4px 14px rgba(79, 70, 229, 0.35);
}

.navbar .btn-nav:hover {
  background: var(--color-primary-dark);
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(79, 70, 229, 0.45);
}

.navbar .btn-nav::after {
  display: none !important;
}

/* Hamburger */
.hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  background: none;
  border: none;
  padding: 4px;
  z-index: 1001;
}

.hamburger span {
  display: block;
  width: 26px;
  height: 2.5px;
  background: var(--color-dark);
  border-radius: 3px;
  transition: var(--transition-base);
}

.hamburger.active span:nth-child(1) {
  transform: rotate(45deg) translate(5px, 5px);
}

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

.hamburger.active span:nth-child(3) {
  transform: rotate(-45deg) translate(5px, -5px);
}

/* Mobile Menu */
.mobile-menu {
  display: none;
  position: fixed;
  top: 0;
  right: -100%;
  width: 80%;
  max-width: 360px;
  height: 100vh;
  background: #fff;
  box-shadow: -4px 0 30px rgba(0, 0, 0, 0.1);
  padding: 5rem 2rem 2rem;
  transition: right 0.4s cubic-bezier(0.4, 0, 0.2, 1);
  z-index: 1000;
}

.mobile-menu.open {
  right: 0;
}

.mobile-menu a {
  display: block;
  padding: 0.875rem 0;
  color: var(--color-dark);
  text-decoration: none;
  font-size: 1.1rem;
  font-weight: 500;
  border-bottom: 1px solid #f1f5f9;
  transition: var(--transition-base);
}

.mobile-menu a:hover,
.mobile-menu a.active {
  color: var(--color-primary);
}

.mobile-menu .btn-nav {
  display: inline-block;
  margin-top: 1.5rem;
  background: var(--color-primary);
  color: #fff !important;
  padding: 0.75rem 2rem;
  border-radius: 50px;
  font-weight: 600;
  text-align: center;
  border-bottom: none !important;
}

.mobile-overlay {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.4);
  z-index: 999;
  opacity: 0;
  transition: opacity 0.3s ease;
}

.mobile-overlay.show {
  display: block;
  opacity: 1;
}

/* ---------- Hero Section ---------- */
.hero-section {
  padding: 8rem 0 6rem;
  background: linear-gradient(180deg, #eef2ff 0%, #ffffff 100%);
  position: relative;
  overflow: hidden;
}

.hero-section::before {
  content: '';
  position: absolute;
  top: -200px;
  right: -200px;
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, rgba(79, 70, 229, 0.06) 0%, transparent 70%);
  border-radius: 50%;
  pointer-events: none;
}

.hero-section::after {
  content: '';
  position: absolute;
  bottom: -100px;
  left: -100px;
  width: 400px;
  height: 400px;
  background: radial-gradient(circle, rgba(129, 140, 248, 0.08) 0%, transparent 70%);
  border-radius: 50%;
  pointer-events: none;
}

.hero-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 1.5rem;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
  align-items: center;
  position: relative;
  z-index: 1;
}

.hero-content h1 {
  font-size: clamp(2rem, 5vw, 3.25rem);
  font-weight: 800;
  line-height: 1.15;
  color: var(--color-dark);
  margin-bottom: 1.5rem;
  letter-spacing: -0.02em;
}

.hero-content h1 .highlight {
  background: linear-gradient(135deg, #4f46e5, #818cf8);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-content p {
  font-size: 1.125rem;
  color: var(--color-gray);
  line-height: 1.7;
  margin-bottom: 2.5rem;
  max-width: 480px;
}

.hero-buttons {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
}

.btn-primary {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  background: var(--color-primary);
  color: #fff;
  padding: 0.875rem 2rem;
  border-radius: 50px;
  font-weight: 600;
  font-size: 1rem;
  text-decoration: none;
  transition: var(--transition-base);
  box-shadow: 0 6px 24px rgba(79, 70, 229, 0.35);
  border: none;
  cursor: pointer;
}

.btn-primary:hover {
  background: var(--color-primary-dark);
  transform: translateY(-3px);
  box-shadow: 0 10px 30px rgba(79, 70, 229, 0.45);
}

.btn-outline {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  background: #fff;
  color: var(--color-primary);
  padding: 0.875rem 2rem;
  border-radius: 50px;
  font-weight: 600;
  font-size: 1rem;
  text-decoration: none;
  border: 2px solid #e0e7ff;
  transition: var(--transition-base);
  cursor: pointer;
}

.btn-outline:hover {
  border-color: var(--color-primary);
  background: var(--color-primary-bg);
  transform: translateY(-3px);
  box-shadow: var(--shadow-md);
}

.hero-image {
  display: flex;
  justify-content: center;
  align-items: center;
}

.hero-image img {
  max-width: 100%;
  height: auto;
  border-radius: var(--radius-xl);
  box-shadow: 0 25px 60px rgba(0, 0, 0, 0.12);
}

/* ---------- Section 通用 ---------- */
.section {
  padding: 5rem 0;
}

.section-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 1.5rem;
}

.section-header {
  text-align: center;
  margin-bottom: 3.5rem;
}

.section-badge {
  display: inline-block;
  background: var(--color-primary-bg);
  color: var(--color-primary);
  padding: 0.375rem 1.25rem;
  border-radius: 50px;
  font-weight: 600;
  font-size: 0.875rem;
  margin-bottom: 1rem;
}

.section-title {
  font-size: clamp(1.6rem, 4vw, 2.25rem);
  font-weight: 800;
  color: var(--color-dark);
  margin-bottom: 1rem;
  letter-spacing: -0.01em;
}

.section-desc {
  font-size: 1.05rem;
  color: var(--color-gray);
  max-width: 560px;
  margin: 0 auto;
  line-height: 1.7;
}

/* ---------- Features ---------- */
.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.75rem;
}

.feature-card {
  background: #fff;
  border-radius: var(--radius-xl);
  padding: 2.5rem 2rem;
  transition: var(--transition-base);
  border: 1px solid #f1f5f9;
  position: relative;
  overflow: hidden;
}

.feature-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, #4f46e5, #818cf8);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.4s ease;
}

.feature-card:hover {
  transform: translateY(-10px);
  box-shadow: var(--shadow-lg);
  border-color: transparent;
}

.feature-card:hover::before {
  transform: scaleX(1);
}

.feature-icon {
  width: 60px;
  height: 60px;
  background: var(--color-primary-bg);
  border-radius: 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  color: var(--color-primary);
  margin-bottom: 1.5rem;
  transition: var(--transition-base);
}

.feature-card:hover .feature-icon {
  background: var(--color-primary);
  color: #fff;
  transform: scale(1.05);
}

.feature-card h3 {
  font-weight: 700;
  font-size: 1.2rem;
  margin-bottom: 0.75rem;
  color: var(--color-dark);
}

.feature-card p {
  color: var(--color-gray);
  font-size: 0.95rem;
  line-height: 1.7;
}

/* ---------- Stats ---------- */
.stats-section {
  background: linear-gradient(135deg, #4f46e5, #4338ca);
  padding: 4rem 0;
  position: relative;
  overflow: hidden;
}

.stats-section::before {
  content: '';
  position: absolute;
  top: -100px;
  right: -100px;
  width: 300px;
  height: 300px;
  background: rgba(255, 255, 255, 0.05);
  border-radius: 50%;
}

.stats-section::after {
  content: '';
  position: absolute;
  bottom: -80px;
  left: -80px;
  width: 250px;
  height: 250px;
  background: rgba(255, 255, 255, 0.04);
  border-radius: 50%;
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 2rem;
  position: relative;
  z-index: 1;
}

.stat-item {
  text-align: center;
  color: #fff;
}

.stat-number {
  font-size: 2.75rem;
  font-weight: 800;
  margin-bottom: 0.5rem;
  line-height: 1;
  font-variant-numeric: tabular-nums;
}

.stat-suffix {
  font-size: 1.25rem;
  font-weight: 400;
}

.stat-label {
  font-size: 1rem;
  opacity: 0.85;
  font-weight: 500;
}

/* ---------- Testimonials ---------- */
.testimonials-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.75rem;
}

.testimonial-card {
  background: #fff;
  border-radius: var(--radius-xl);
  padding: 2rem;
  border: 1px solid #f1f5f9;
  transition: var(--transition-base);
}

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

.testimonial-stars {
  color: #f59e0b;
  font-size: 1rem;
  margin-bottom: 1rem;
  letter-spacing: 2px;
}

.testimonial-text {
  color: var(--color-dark);
  font-size: 0.95rem;
  line-height: 1.7;
  margin-bottom: 1.5rem;
  font-style: italic;
}

.testimonial-author {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.testimonial-author img {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  object-fit: cover;
  border: 2px solid var(--color-primary-bg);
}

.testimonial-author .author-info h4 {
  font-weight: 600;
  font-size: 0.95rem;
  color: var(--color-dark);
}

.testimonial-author .author-info span {
  font-size: 0.8rem;
  color: var(--color-gray);
}

/* ---------- FAQ Accordion ---------- */
.faq-list {
  max-width: 760px;
  margin: 0 auto;
}

.faq-item {
  background: #fff;
  border-radius: var(--radius-lg);
  margin-bottom: 0.75rem;
  border: 1px solid #f1f5f9;
  overflow: hidden;
  transition: var(--transition-base);
}

.faq-item:hover {
  border-color: #e0e7ff;
}

.faq-question {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1.25rem 1.5rem;
  background: none;
  border: none;
  cursor: pointer;
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--color-dark);
  text-align: left;
  transition: var(--transition-base);
  gap: 1rem;
}

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

.faq-question i {
  transition: transform 0.35s ease;
  color: var(--color-gray);
  font-size: 0.9rem;
  flex-shrink: 0;
}

.faq-item.active .faq-question i {
  transform: rotate(180deg);
  color: var(--color-primary);
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.4s ease, padding 0.4s ease;
}

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

.faq-answer-inner {
  padding: 0 1.5rem 1.25rem;
  color: var(--color-gray);
  font-size: 0.95rem;
  line-height: 1.75;
}

/* ---------- CTA Section ---------- */
.cta-section {
  background: linear-gradient(135deg, #4f46e5, #4338ca);
  padding: 5rem 0;
  position: relative;
  overflow: hidden;
}

.cta-section .cta-dots {
  position: absolute;
  inset: 0;
  background-image: radial-gradient(rgba(255, 255, 255, 0.1) 1px, transparent 1px);
  background-size: 30px 30px;
  opacity: 0.4;
}

.cta-section .cta-content {
  position: relative;
  z-index: 1;
  text-align: center;
  color: #fff;
  max-width: 640px;
  margin: 0 auto;
}

.cta-section h2 {
  font-size: clamp(1.75rem, 4vw, 2.5rem);
  font-weight: 800;
  margin-bottom: 1rem;
  letter-spacing: -0.01em;
}

.cta-section p {
  font-size: 1.1rem;
  opacity: 0.9;
  margin-bottom: 2.5rem;
  line-height: 1.7;
}

.cta-section .btn-white {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  background: #fff;
  color: var(--color-primary);
  padding: 0.875rem 2.25rem;
  border-radius: 50px;
  font-weight: 700;
  font-size: 1rem;
  text-decoration: none;
  transition: var(--transition-base);
  box-shadow: 0 6px 24px rgba(0, 0, 0, 0.15);
}

.cta-section .btn-white:hover {
  transform: translateY(-3px);
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
  background: #f8fafc;
}

/* ---------- Footer ---------- */
.footer {
  background: #0f172a;
  color: #cbd5e1;
  padding: 4rem 0 2rem;
}

.footer-grid {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 1.5rem;
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 3rem;
}

.footer-brand .logo-icon {
  width: 40px;
  height: 40px;
  background: linear-gradient(135deg, #4f46e5, #818cf8);
  border-radius: 12px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-size: 1.25rem;
  margin-bottom: 1rem;
}

.footer-brand h3 {
  color: #fff;
  font-weight: 700;
  font-size: 1.25rem;
  margin-bottom: 0.75rem;
}

.footer-brand p {
  font-size: 0.875rem;
  line-height: 1.7;
  margin-bottom: 1.25rem;
  max-width: 280px;
}

.footer-social {
  display: flex;
  gap: 0.75rem;
}

.footer-social a {
  width: 36px;
  height: 36px;
  border-radius: 10px;
  background: rgba(255, 255, 255, 0.08);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #cbd5e1;
  font-size: 1rem;
  text-decoration: none;
  transition: var(--transition-base);
}

.footer-social a:hover {
  background: var(--color-primary);
  color: #fff;
  transform: translateY(-2px);
}

.footer-col h4 {
  color: #fff;
  font-weight: 700;
  font-size: 1rem;
  margin-bottom: 1.25rem;
}

.footer-col ul {
  list-style: none;
}

.footer-col ul li {
  margin-bottom: 0.625rem;
}

.footer-col ul li a {
  color: #94a3b8;
  text-decoration: none;
  font-size: 0.9rem;
  transition: var(--transition-base);
}

.footer-col ul li a:hover {
  color: #fff;
  padding-left: 4px;
}

.footer-bottom {
  max-width: 1200px;
  margin: 3rem auto 0;
  padding: 1.5rem 1.5rem 0;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 1rem;
  font-size: 0.85rem;
}

.footer-bottom a {
  color: #94a3b8;
  text-decoration: none;
  transition: color 0.2s;
}

.footer-bottom a:hover {
  color: #fff;
}

/* ---------- Page Header (关于/联系 页面) ---------- */
.page-header {
  padding: 9rem 0 4rem;
  background: linear-gradient(180deg, #eef2ff 0%, #ffffff 100%);
  text-align: center;
}

.page-header h1 {
  font-size: clamp(1.8rem, 4vw, 2.75rem);
  font-weight: 800;
  color: var(--color-dark);
  margin-bottom: 1rem;
  letter-spacing: -0.01em;
}

.page-header p {
  font-size: 1.1rem;
  color: var(--color-gray);
  max-width: 560px;
  margin: 0 auto;
  line-height: 1.7;
}

/* ---------- About Page ---------- */
.about-content {
  padding: 4rem 0 5rem;
}

.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
  align-items: center;
}

.about-image img {
  width: 100%;
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-lg);
}

.about-text h2 {
  font-size: 2rem;
  font-weight: 800;
  color: var(--color-dark);
  margin-bottom: 1.25rem;
  letter-spacing: -0.01em;
}

.about-text p {
  color: var(--color-gray);
  line-height: 1.8;
  margin-bottom: 1rem;
  font-size: 0.95rem;
}

.about-values {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
  margin-top: 2rem;
}

.about-value-item {
  text-align: center;
  padding: 1.5rem 1rem;
  background: #fff;
  border-radius: var(--radius-lg);
  border: 1px solid #f1f5f9;
  transition: var(--transition-base);
}

.about-value-item:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
}

.about-value-item i {
  font-size: 1.5rem;
  color: var(--color-primary);
  margin-bottom: 0.75rem;
}

.about-value-item h4 {
  font-weight: 700;
  font-size: 1rem;
  color: var(--color-dark);
}

/* ---------- Contact Page ---------- */
.contact-content {
  padding: 4rem 0 5rem;
}

.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1.2fr;
  gap: 4rem;
}

.contact-info h2 {
  font-size: 2rem;
  font-weight: 800;
  color: var(--color-dark);
  margin-bottom: 1rem;
  letter-spacing: -0.01em;
}

.contact-info > p {
  color: var(--color-gray);
  line-height: 1.7;
  margin-bottom: 2rem;
}

.contact-detail {
  display: flex;
  align-items: flex-start;
  gap: 1rem;
  margin-bottom: 1.5rem;
}

.contact-detail .contact-icon {
  width: 48px;
  height: 48px;
  background: var(--color-primary-bg);
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-primary);
  font-size: 1.15rem;
  flex-shrink: 0;
}

.contact-detail h4 {
  font-weight: 600;
  color: var(--color-dark);
  margin-bottom: 0.25rem;
}

.contact-detail p {
  color: var(--color-gray);
  font-size: 0.9rem;
}

/* Contact Form */
.contact-form-wrap {
  background: #fff;
  border-radius: var(--radius-xl);
  padding: 2.5rem;
  border: 1px solid #f1f5f9;
  box-shadow: var(--shadow-md);
}

.contact-form-wrap h3 {
  font-weight: 700;
  font-size: 1.35rem;
  color: var(--color-dark);
  margin-bottom: 1.5rem;
}

.form-group {
  margin-bottom: 1.25rem;
}

.form-group label {
  display: block;
  font-weight: 500;
  font-size: 0.9rem;
  color: var(--color-dark);
  margin-bottom: 0.5rem;
}

.form-group input,
.form-group textarea,
.form-group select {
  width: 100%;
  padding: 0.75rem 1rem;
  border: 2px solid #e2e8f0;
  border-radius: 12px;
  font-size: 0.95rem;
  font-family: inherit;
  color: var(--color-dark);
  transition: var(--transition-base);
  background: #f8fafc;
  outline: none;
}

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
  border-color: var(--color-primary);
  background: #fff;
  box-shadow: 0 0 0 3px rgba(79, 70, 229, 0.1);
}

.form-group textarea {
  resize: vertical;
  min-height: 140px;
}

.form-submit {
  width: 100%;
  background: var(--color-primary);
  color: #fff;
  border: none;
  padding: 0.875rem;
  border-radius: 12px;
  font-weight: 600;
  font-size: 1rem;
  cursor: pointer;
  transition: var(--transition-base);
  font-family: inherit;
}

.form-submit:hover {
  background: var(--color-primary-dark);
  box-shadow: 0 6px 20px rgba(79, 70, 229, 0.35);
}

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

.form-result {
  margin-top: 1rem;
  padding: 0.75rem 1rem;
  border-radius: 10px;
  font-weight: 500;
  font-size: 0.9rem;
  display: none;
}

.form-result.success {
  display: block;
  background: #f0fdf4;
  color: #16a34a;
  border: 1px solid #bbf7d0;
}

.form-result.error {
  display: block;
  background: #fef2f2;
  color: #dc2626;
  border: 1px solid #fecaca;
}

/* ---------- 动画 ---------- */
.fade-in-up {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

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

.fade-in-up-delay-1 { transition-delay: 0.1s; }
.fade-in-up-delay-2 { transition-delay: 0.2s; }
.fade-in-up-delay-3 { transition-delay: 0.3s; }
.fade-in-up-delay-4 { transition-delay: 0.4s; }

/* Count-up animation */
@keyframes countUp {
  from { opacity: 0; transform: translateY(20px); }
  to { opacity: 1; transform: translateY(0); }
}

.count-up {
  animation: countUp 0.6s ease forwards;
}

/* ---------- 响应式 ---------- */
@media (max-width: 1024px) {
  .features-grid {
    grid-template-columns: repeat(2, 1fr);
  }

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

  .about-grid {
    grid-template-columns: 1fr;
    gap: 2.5rem;
  }

  .contact-grid {
    grid-template-columns: 1fr;
    gap: 2.5rem;
  }
}

@media (max-width: 768px) {
  .navbar .nav-links {
    display: none;
  }

  .hamburger {
    display: flex;
  }

  .mobile-menu {
    display: block;
  }

  .hero-container {
    grid-template-columns: 1fr;
    text-align: center;
    gap: 2.5rem;
  }

  .hero-content p {
    max-width: 100%;
  }

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

  .hero-image {
    order: -1;
  }

  .hero-image img {
    max-width: 80%;
  }

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

  .stats-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 2.5rem;
  }

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

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

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

  .section {
    padding: 3.5rem 0;
  }

  .contact-form-wrap {
    padding: 1.5rem;
  }
}

@media (max-width: 480px) {
  .hero-buttons {
    flex-direction: column;
  }

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

  .about-values {
    grid-template-columns: 1fr;
  }
}