/* ========================================
   送水宝 官网样式
   移动优先 + 响应式设计
   ======================================== */

/* ---------- CSS 变量（设计系统） ---------- */
:root {
  --color-primary: #14b8a6;
  --color-primary-dark: #0d9488;
  --color-primary-light: #5eead4;
  --color-accent: #3b82f6;
  --color-accent-dark: #2563eb;

  --color-dark-950: #020617;
  --color-dark-900: #0f172a;
  --color-dark-800: #1e293b;
  --color-dark-700: #334155;
  --color-dark-600: #475569;
  --color-dark-500: #64748b;
  --color-dark-400: #94a3b8;
  --color-dark-300: #cbd5e1;
  --color-dark-200: #e2e8f0;
  --color-dark-100: #f1f5f9;
  --color-dark-50: #f8fafc;

  --color-white: #ffffff;

  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI',
    'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', 'Helvetica Neue',
    sans-serif;

  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.08);
  --shadow-lg: 0 10px 25px -3px rgba(0, 0, 0, 0.1);
  --shadow-xl: 0 20px 50px -6px rgba(0, 0, 0, 0.12);

  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-xl: 24px;

  --transition: 0.3s ease;
}

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

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-sans);
  color: var(--color-dark-800);
  background: var(--color-white);
  line-height: 1.6;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

ul {
  list-style: none;
}

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

::selection {
  background: rgba(20, 184, 166, 0.3);
}

/* ---------- 工具类 ---------- */
.container {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 1rem;
}

@media (min-width: 640px) {
  .container { padding: 0 1.5rem; }
}

@media (min-width: 1024px) {
  .container { padding: 0 2rem; }
}

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

.section {
  padding: 5rem 0;
}

@media (min-width: 768px) {
  .section { padding: 6rem 0; }
}

@media (min-width: 1024px) {
  .section { padding: 7rem 0; }
}

.section-badge {
  display: inline-block;
  padding: 0.375rem 1rem;
  border-radius: 999px;
  font-size: 0.8125rem;
  font-weight: 600;
  margin-bottom: 1rem;
  letter-spacing: 0.01em;
}

.section-title {
  font-size: 1.75rem;
  font-weight: 900;
  color: var(--color-dark-900);
  line-height: 1.15;
  letter-spacing: -0.02em;
}

@media (min-width: 640px) {
  .section-title { font-size: 2.25rem; }
}

@media (min-width: 1024px) {
  .section-title { font-size: 3rem; }
}

.section-subtitle {
  color: var(--color-dark-400);
  font-size: 1.0625rem;
  line-height: 1.7;
  margin-top: 0.75rem;
}

/* ---------- 滚动动画 ---------- */
.animate-on-scroll {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}

.animate-on-scroll.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ========================================
   导航栏
   ======================================== */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  transition: background var(--transition), box-shadow var(--transition);
}

.navbar.scrolled {
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  box-shadow: 0 1px 0 var(--color-dark-100);
}

.navbar-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 4rem;
}

@media (min-width: 1024px) {
  .navbar-inner { height: 5rem; }
}

/* Logo */
.navbar-logo {
  display: flex;
  align-items: center;
  gap: 0.625rem;
  font-size: 1.25rem;
  font-weight: 800;
  color: var(--color-dark-900);
}

.navbar-logo-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 2.25rem;
  height: 2.25rem;
  border-radius: var(--radius-md);
  background: linear-gradient(135deg, var(--color-primary), var(--color-accent));
  box-shadow: 0 4px 12px rgba(20, 184, 166, 0.3);
}

.navbar-logo-icon svg {
  width: 1.25rem;
  height: 1.25rem;
  color: #fff;
}

/* 桌面导航 */
.nav-links {
  display: none;
  align-items: center;
  gap: 2rem;
}

@media (min-width: 1024px) {
  .nav-links { display: flex; }
}

.nav-links a {
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--color-dark-600);
  transition: color var(--transition);
  position: relative;
}

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

.nav-links a:hover {
  color: var(--color-dark-900);
}

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

/* CTA 按钮 */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.625rem 1.25rem;
  font-size: 0.875rem;
  font-weight: 600;
  border-radius: var(--radius-lg);
  transition: all var(--transition);
  cursor: pointer;
  border: none;
  font-family: inherit;
  white-space: nowrap;
}

.btn-primary {
  background: linear-gradient(135deg, var(--color-primary), var(--color-primary-dark));
  color: #fff;
  box-shadow: 0 4px 14px rgba(20, 184, 166, 0.3);
}

.btn-primary:hover {
  background: linear-gradient(135deg, var(--color-primary-dark), var(--color-primary-dark));
  box-shadow: 0 6px 20px rgba(20, 184, 166, 0.4);
  transform: translateY(-1px);
}

.btn-outline {
  border: 1px solid var(--color-dark-200);
  color: var(--color-dark-700);
  background: transparent;
}

.btn-outline:hover {
  border-color: var(--color-dark-300);
  background: var(--color-dark-50);
}

.btn-lg {
  padding: 0.875rem 2rem;
  font-size: 0.9375rem;
  border-radius: var(--radius-lg);
}

/* 桌面 CTA 按钮 */
.nav-cta {
  display: none;
}

@media (min-width: 1024px) {
  .nav-cta { display: inline-flex; }
}

/* 移动端菜单按钮 */
.menu-toggle {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 2.5rem;
  height: 2.5rem;
  border: none;
  background: transparent;
  cursor: pointer;
  color: var(--color-dark-700);
  border-radius: var(--radius-sm);
}

@media (min-width: 1024px) {
  .menu-toggle { display: none; }
}

.menu-toggle:hover {
  background: var(--color-dark-100);
}

.menu-toggle svg {
  width: 1.5rem;
  height: 1.5rem;
}

/* 移动端菜单面板 */
.mobile-menu {
  position: fixed;
  top: 0;
  right: 0;
  bottom: 0;
  width: 280px;
  background: var(--color-white);
  box-shadow: -10px 0 40px rgba(0, 0, 0, 0.15);
  z-index: 200;
  transform: translateX(100%);
  transition: transform 0.35s cubic-bezier(0.4, 0, 0.2, 1);
  padding: 1.5rem;
  display: flex;
  flex-direction: column;
}

.mobile-menu.open {
  transform: translateX(0);
}

.mobile-menu-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.4);
  z-index: 199;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.35s ease;
}

.mobile-menu-overlay.open {
  opacity: 1;
  pointer-events: auto;
}

.mobile-menu-close {
  align-self: flex-end;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 2.5rem;
  height: 2.5rem;
  border: none;
  background: transparent;
  cursor: pointer;
  border-radius: var(--radius-sm);
  color: var(--color-dark-600);
  margin-bottom: 1.5rem;
}

.mobile-menu-close:hover {
  background: var(--color-dark-50);
}

.mobile-menu a {
  display: block;
  padding: 0.75rem 0.5rem;
  font-size: 0.9375rem;
  font-weight: 500;
  color: var(--color-dark-700);
  border-radius: var(--radius-sm);
  transition: all var(--transition);
}

.mobile-menu a:hover {
  background: var(--color-dark-50);
  color: var(--color-dark-900);
}

.mobile-menu .btn {
  margin-top: 1rem;
  justify-content: center;
}

/* ========================================
   Hero 首屏
   ======================================== */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  background: var(--color-dark-950);
  overflow: hidden;
}

/* 背景光晕 */
.hero-bg {
  position: absolute;
  inset: 0;
  pointer-events: none;
  overflow: hidden;
}

.hero-orb {
  position: absolute;
  border-radius: 50%;
  filter: blur(80px);
  opacity: 0.15;
}

.hero-orb-1 {
  width: 400px;
  height: 400px;
  top: -10%;
  left: 20%;
  background: var(--color-primary);
}

.hero-orb-2 {
  width: 350px;
  height: 350px;
  bottom: -10%;
  right: 10%;
  background: var(--color-accent);
}

.hero-orb-3 {
  width: 500px;
  height: 300px;
  top: 40%;
  left: 50%;
  transform: translate(-50%, -50%);
  background: linear-gradient(135deg, var(--color-primary), var(--color-accent));
  opacity: 0.08;
}

/* 网格背景 */
.hero-grid {
  position: absolute;
  inset: 0;
  opacity: 0.025;
  background-image: radial-gradient(circle at 1px 1px, #fff 1px, transparent 0);
  background-size: 40px 40px;
  pointer-events: none;
}

.hero-content {
  position: relative;
  z-index: 10;
  text-align: center;
  padding: 7rem 0 4rem;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.375rem 1rem;
  border-radius: 999px;
  border: 1px solid rgba(20, 184, 166, 0.3);
  background: rgba(20, 184, 166, 0.05);
  color: var(--color-primary-light);
  font-size: 0.8125rem;
  font-weight: 500;
  margin-bottom: 1.5rem;
  opacity: 0;
  transform: translateY(20px);
  animation: fadeInUp 0.6s ease forwards;
}

.hero-badge-dot {
  width: 0.5rem;
  height: 0.5rem;
  border-radius: 50%;
  background: var(--color-primary-light);
  animation: pulse 2s ease-in-out infinite;
}

.hero-title {
  font-size: 2rem;
  font-weight: 900;
  line-height: 1.12;
  color: var(--color-white);
  letter-spacing: -0.02em;
  opacity: 0;
  transform: translateY(20px);
  animation: fadeInUp 0.6s ease 0.1s forwards;
}

@media (min-width: 640px) {
  .hero-title { font-size: 2.75rem; }
}

@media (min-width: 1024px) {
  .hero-title { font-size: 3.75rem; }
}

.hero-desc {
  font-size: 1rem;
  color: var(--color-dark-300);
  margin-top: 1.25rem;
  line-height: 1.7;
  opacity: 0;
  transform: translateY(20px);
  animation: fadeInUp 0.6s ease 0.2s forwards;
}

@media (min-width: 640px) {
  .hero-desc { font-size: 1.125rem; }
}

.hero-actions {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  margin-top: 2rem;
  justify-content: center;
  align-items: center;
  opacity: 0;
  transform: translateY(20px);
  animation: fadeInUp 0.6s ease 0.3s forwards;
}

@media (min-width: 640px) {
  .hero-actions { flex-direction: row; }
}

/* 信任徽章 */
.hero-trust-banner {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.25rem;
  margin-top: 1.25rem;
  padding: 0.75rem 1.5rem;
  border-radius: 999px;
  background: rgba(20, 184, 166, 0.12);
  border: 1px solid rgba(20, 184, 166, 0.3);
  opacity: 0;
  transform: translateY(20px);
  animation: fadeInUp 0.6s ease 0.25s forwards;
}

.hero-trust-banner > span:first-of-type {
  display: flex;
  align-items: center;
  gap: 0.625rem;
  color: var(--color-primary-light);
  font-size: 0.8125rem;
  font-weight: 600;
}

.hero-trust-banner > span:first-of-type svg {
  flex-shrink: 0;
  color: var(--color-primary);
}

.hero-trust-sub {
  font-size: 0.6875rem;
  color: var(--color-dark-400);
  font-weight: 400;
}

@media (min-width: 640px) {
  .hero-trust-banner { padding: 0.75rem 2rem; }
  .hero-trust-banner > span:first-of-type { font-size: 0.875rem; }
  .hero-trust-sub { font-size: 0.75rem; }
}

.hero-stats {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1.5rem;
  margin-top: 3.5rem;
  padding-top: 2.5rem;
  border-top: 1px solid rgba(51, 65, 85, 0.5);
  opacity: 0;
  animation: fadeInUp 0.6s ease 0.4s forwards;
}

@media (min-width: 768px) {
  .hero-stats { grid-template-columns: repeat(4, 1fr); }
}

.hero-stat-value {
  font-size: 1.5rem;
  font-weight: 900;
  color: var(--color-white);
}

@media (min-width: 1024px) {
  .hero-stat-value { font-size: 2rem; }
}

.hero-stat-label {
  font-size: 0.8125rem;
  color: var(--color-dark-400);
  margin-top: 0.25rem;
}

/* 底部渐变过渡 */
.hero-fade {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 8rem;
  background: linear-gradient(to top, var(--color-white), transparent);
  pointer-events: none;
}

/* ========================================
   通用板块头部
   ======================================== */
.section-header {
  text-align: center;
  max-width: 48rem;
  margin: 0 auto 3.5rem;
}

@media (min-width: 768px) {
  .section-header { margin-bottom: 4rem; }
}

/* ========================================
   痛点板块
   ======================================== */
.pain-points {
  background: var(--color-white);
}

.pain-points .section-badge {
  background: #fef2f2;
  color: #ef4444;
}

.pain-points-grid {
  display: grid;
  gap: 1.25rem;
}

@media (min-width: 640px) {
  .pain-points-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (min-width: 1024px) {
  .pain-points-grid { grid-template-columns: repeat(3, 1fr); }
}

.pain-card {
  background: var(--color-white);
  border: 1px solid var(--color-dark-100);
  border-radius: var(--radius-lg);
  padding: 1.75rem;
  transition: all var(--transition);
}

.pain-card:hover {
  border-color: var(--color-dark-200);
  box-shadow: var(--shadow-lg);
  transform: translateY(-2px);
}

.pain-card-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 3rem;
  height: 3rem;
  border-radius: var(--radius-md);
  margin-bottom: 1rem;
  box-shadow: var(--shadow-md);
}

.pain-card-icon svg {
  width: 1.5rem;
  height: 1.5rem;
  color: #fff;
}

.pain-card h3 {
  font-size: 1.0625rem;
  font-weight: 700;
  color: var(--color-dark-900);
  margin-bottom: 0.5rem;
}

.pain-card p {
  font-size: 0.9375rem;
  color: var(--color-dark-400);
  line-height: 1.65;
}

/* ---------- 各卡片的图标颜色 ---------- */
.pain-icon-red { background: linear-gradient(135deg, #ef4444, #e11d48); }
.pain-icon-orange { background: linear-gradient(135deg, #f97316, #d97706); }
.pain-icon-blue { background: linear-gradient(135deg, #3b82f6, #0891b2); }
.pain-icon-purple { background: linear-gradient(135deg, #8b5cf6, #7c3aed); }
.pain-icon-pink { background: linear-gradient(135deg, #ec4899, #e11d48); }
.pain-icon-teal { background: linear-gradient(135deg, #14b8a6, #059669); }

/* ========================================
   解决方案板块
   ======================================== */
.solution {
  position: relative;
  background: var(--color-dark-950);
  overflow: hidden;
}

.solution-bg {
  position: absolute;
  inset: 0;
  pointer-events: none;
}

.solution-orb-1 {
  position: absolute;
  width: 400px;
  height: 400px;
  top: 0;
  right: -10%;
  background: rgba(20, 184, 166, 0.08);
  border-radius: 50%;
  filter: blur(80px);
}

.solution-orb-2 {
  position: absolute;
  width: 350px;
  height: 350px;
  bottom: 0;
  left: -10%;
  background: rgba(59, 130, 246, 0.06);
  border-radius: 50%;
  filter: blur(80px);
}

.solution-grid-bg {
  position: absolute;
  inset: 0;
  opacity: 0.025;
  background-image: radial-gradient(circle at 1px 1px, #fff 1px, transparent 0);
  background-size: 40px 40px;
}

.solution .container {
  position: relative;
  z-index: 10;
}

.solution .section-badge {
  background: rgba(20, 184, 166, 0.1);
  color: var(--color-primary-light);
}

.solution .section-title {
  color: var(--color-white);
}

.solution .section-subtitle {
  color: var(--color-dark-400);
}

.solution-cards {
  display: grid;
  gap: 1.5rem;
}

@media (min-width: 1024px) {
  .solution-cards { grid-template-columns: repeat(2, 1fr); }
}

.solution-card {
  border: 1px solid var(--color-dark-700);
  border-radius: var(--radius-xl);
  padding: 1.75rem;
  background: rgba(30, 41, 59, 0.5);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  transition: border-color var(--transition);
}

.solution-card:hover {
  border-color: var(--color-dark-600);
}

@media (min-width: 640px) {
  .solution-card { padding: 2rem; }
}

@media (min-width: 1024px) {
  .solution-card { padding: 2.5rem; }
}

.solution-card-header {
  display: flex;
  align-items: center;
  gap: 1rem;
  margin-bottom: 1.25rem;
}

.solution-card-number {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 2.75rem;
  height: 2.75rem;
  border-radius: var(--radius-lg);
  background: linear-gradient(135deg, var(--color-primary), var(--color-accent));
  color: #fff;
  font-size: 1.125rem;
  font-weight: 900;
  flex-shrink: 0;
}

.solution-card h3 {
  font-size: 1.125rem;
  font-weight: 700;
  color: var(--color-white);
}

.solution-card > p {
  color: var(--color-dark-300);
  font-size: 0.9375rem;
  line-height: 1.65;
  margin-bottom: 1.25rem;
}

.solution-card ul {
  display: flex;
  flex-direction: column;
  gap: 0.625rem;
}

.solution-card ul li {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  color: var(--color-dark-300);
  font-size: 0.9375rem;
}

.solution-card ul li::before {
  content: '';
  display: inline-block;
  width: 1.25rem;
  height: 1.25rem;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 24 24' fill='none' stroke='%2314b8a6' stroke-width='2.5' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='20 6 9 17 4 12'/%3E%3C/svg%3E");
  background-size: contain;
  flex-shrink: 0;
}

/* 流程条 */
.solution-flow {
  margin-top: 2.5rem;
  padding: 1.75rem;
  border: 1px solid var(--color-dark-700);
  border-radius: var(--radius-xl);
  background: linear-gradient(135deg, rgba(30, 41, 59, 0.6), rgba(15, 23, 42, 0.6));
}

@media (min-width: 768px) {
  .solution-flow { padding: 2.5rem; }
}

.solution-flow-steps {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1rem;
}

@media (min-width: 1024px) {
  .solution-flow-steps { flex-direction: row; }
}

.flow-step {
  display: flex;
  align-items: center;
  gap: 1rem;
  text-align: center;
}

@media (min-width: 1024px) {
  .flow-step { flex-direction: row; text-align: center; }
}

.flow-step-circle {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 3rem;
  height: 3rem;
  border-radius: var(--radius-lg);
  font-weight: 700;
  color: #fff;
  flex-shrink: 0;
}

.flow-step-circle.step-1 { background: var(--color-primary); }
.flow-step-circle.step-2 { background: var(--color-accent); }
.flow-step-circle.step-3 { background: #10b981; }
.flow-step-circle.step-4 { background: #8b5cf6; }

.flow-step-info {
  min-width: 0;
}

.flow-step-info .name {
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--color-white);
}

.flow-step-info .desc {
  font-size: 0.75rem;
  color: var(--color-dark-400);
}

.flow-arrow {
  color: var(--color-dark-600);
  flex-shrink: 0;
}

.flow-arrow svg {
  width: 1.5rem;
  height: 1.5rem;
}

@media (max-width: 1023px) {
  .flow-arrow svg { transform: rotate(90deg); }
}

/* ========================================
   核心功能板块
   ======================================== */
.features {
  background: var(--color-dark-50);
}

.features .section-badge {
  background: rgba(20, 184, 166, 0.1);
  color: var(--color-primary-dark);
}

.features-grid {
  display: grid;
  gap: 1.25rem;
}

@media (min-width: 640px) {
  .features-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (min-width: 1024px) {
  .features-grid { grid-template-columns: repeat(3, 1fr); }
}

.feature-card {
  background: var(--color-white);
  border: 1px solid var(--color-dark-100);
  border-radius: var(--radius-lg);
  padding: 1.75rem;
  transition: all var(--transition);
}

.feature-card:hover {
  border-color: var(--color-dark-200);
  box-shadow: var(--shadow-lg);
  transform: translateY(-2px);
}

.feature-card-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 3rem;
  height: 3rem;
  border-radius: var(--radius-lg);
  margin-bottom: 1rem;
  color: #fff;
  transition: transform var(--transition);
}

.feature-card:hover .feature-card-icon {
  transform: scale(1.1);
}

.feature-card-icon svg {
  width: 1.5rem;
  height: 1.5rem;
}

.feature-card h3 {
  font-size: 1.0625rem;
  font-weight: 700;
  color: var(--color-dark-900);
  margin-bottom: 0.5rem;
}

.feature-card p {
  font-size: 0.9375rem;
  color: var(--color-dark-400);
  line-height: 1.65;
}

/* 功能图标颜色 */
.feat-icon-1 { background: linear-gradient(135deg, #3b82f6, #06b6d4); }
.feat-icon-2 { background: linear-gradient(135deg, #10b981, #14b8a6); }
.feat-icon-3 { background: linear-gradient(135deg, #f97316, #f59e0b); }
.feat-icon-4 { background: linear-gradient(135deg, #ef4444, #ec4899); }
.feat-icon-5 { background: linear-gradient(135deg, #8b5cf6, #6366f1); }
.feat-icon-6 { background: linear-gradient(135deg, #6366f1, #3b82f6); }

/* ========================================
   商业模式板块
   ======================================== */
.business {
  background: var(--color-white);
}

.business .section-badge {
  background: rgba(20, 184, 166, 0.1);
  color: var(--color-primary-dark);
}

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

@media (min-width: 1024px) {
  .business-grid { grid-template-columns: repeat(4, 1fr); }
}

.business-card {
  text-align: center;
  padding: 1.5rem;
  border: 1px solid var(--color-dark-100);
  border-radius: var(--radius-lg);
  transition: all var(--transition);
}

.business-card:hover {
  border-color: var(--color-primary);
  background: rgba(20, 184, 166, 0.03);
}

.business-card-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 3.25rem;
  height: 3.25rem;
  border-radius: var(--radius-lg);
  background: linear-gradient(135deg, var(--color-primary), var(--color-accent));
  margin-bottom: 1rem;
  color: #fff;
  box-shadow: 0 4px 14px rgba(20, 184, 166, 0.25);
  transition: transform var(--transition);
}

.business-card:hover .business-card-icon {
  transform: scale(1.1);
}

.business-card-icon svg {
  width: 1.5rem;
  height: 1.5rem;
}

.business-card h3 {
  font-size: 0.9375rem;
  font-weight: 700;
  color: var(--color-dark-900);
  margin-bottom: 0.375rem;
}

.business-card p {
  font-size: 0.8125rem;
  color: var(--color-dark-400);
  line-height: 1.6;
}

/* 高亮横幅 */
.business-highlight {
  margin-top: 2.5rem;
  padding: 2rem;
  background: linear-gradient(135deg, var(--color-primary), var(--color-accent));
  border-radius: var(--radius-xl);
  text-align: center;
  position: relative;
  overflow: hidden;
}

.business-highlight::before {
  content: '';
  position: absolute;
  top: -50%;
  right: -20%;
  width: 15rem;
  height: 15rem;
  background: rgba(255, 255, 255, 0.05);
  border-radius: 50%;
  filter: blur(40px);
}

.business-highlight::after {
  content: '';
  position: absolute;
  bottom: -30%;
  left: -10%;
  width: 12rem;
  height: 12rem;
  background: rgba(255, 255, 255, 0.05);
  border-radius: 50%;
  filter: blur(40px);
}

.business-highlight > * {
  position: relative;
  z-index: 1;
}

.business-highlight .label {
  color: rgba(255, 255, 255, 0.8);
  font-size: 0.9375rem;
  font-weight: 500;
  margin-bottom: 0.5rem;
}

.business-highlight .big-text {
  font-size: 1.5rem;
  font-weight: 900;
  color: #fff;
  line-height: 1.2;
}

@media (min-width: 640px) {
  .business-highlight .big-text { font-size: 2rem; }
}

.business-highlight .sub-text {
  color: rgba(255, 255, 255, 0.8);
  font-size: 0.9375rem;
  margin-top: 0.5rem;
}

/* ========================================
   模式对比板块
   ======================================== */
.comparison {
  background: var(--color-dark-50);
}

.comparison .section-badge {
  background: #eff6ff;
  color: var(--color-accent);
}

.compare-table {
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  border: 1px solid var(--color-dark-200);
  border-radius: var(--radius-lg);
  background: var(--color-white);
}

.compare-table table {
  width: 100%;
  border-collapse: collapse;
  min-width: 560px;
}

.compare-table thead th {
  padding: 0.875rem 1rem;
  font-size: 0.8125rem;
  font-weight: 600;
  text-align: center;
  background: var(--color-dark-900);
  color: var(--color-white);
  white-space: nowrap;
}

.compare-table thead th:first-child {
  text-align: left;
  border-right: 1px solid var(--color-dark-700);
}

.compare-table thead th:nth-child(2) {
  border-right: 1px solid var(--color-dark-700);
}

.compare-table thead .bad {
  color: #fca5a5;
}

.compare-table thead .good {
  color: #86efac;
}

.compare-table tbody td {
  padding: 0.875rem 1rem;
  font-size: 0.875rem;
  border-bottom: 1px solid var(--color-dark-100);
  text-align: center;
}

.compare-table tbody td:first-child {
  text-align: left;
  font-weight: 500;
  color: var(--color-dark-700);
  border-right: 1px solid var(--color-dark-100);
}

.compare-table tbody td:nth-child(2) {
  border-right: 1px solid var(--color-dark-100);
  color: var(--color-dark-400);
}

.compare-table tbody td:last-child {
  color: var(--color-dark-800);
  font-weight: 500;
}

.compare-table tbody tr:last-child td {
  border-bottom: none;
}

.compare-table tbody tr:nth-child(even) {
  background: var(--color-dark-50);
}

/* ========================================
   CTA 板块
   ======================================== */
.cta {
  position: relative;
  background: var(--color-dark-950);
  overflow: hidden;
  text-align: center;
}

.cta-bg {
  position: absolute;
  inset: 0;
  pointer-events: none;
}

.cta-orb {
  position: absolute;
  width: 500px;
  height: 500px;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  border-radius: 50%;
  background: linear-gradient(135deg, rgba(20, 184, 166, 0.15), rgba(59, 130, 246, 0.1), rgba(139, 92, 246, 0.08));
  filter: blur(80px);
}

.cta .container {
  position: relative;
  z-index: 10;
}

.cta-title {
  font-size: 1.75rem;
  font-weight: 900;
  color: var(--color-white);
  line-height: 1.2;
  letter-spacing: -0.01em;
}

@media (min-width: 640px) {
  .cta-title { font-size: 2.25rem; }
}

@media (min-width: 1024px) {
  .cta-title { font-size: 3rem; }
}

.cta-desc {
  color: var(--color-dark-300);
  font-size: 1rem;
  margin-top: 1rem;
  line-height: 1.7;
  max-width: 36rem;
  margin-left: auto;
  margin-right: auto;
}

.cta-actions {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  align-items: center;
  justify-content: center;
  margin-top: 2rem;
}

@media (min-width: 640px) {
  .cta-actions { flex-direction: row; }
}

.cta-actions .btn-outline {
  border-color: var(--color-dark-600);
  color: var(--color-dark-300);
}

.cta-actions .btn-outline:hover {
  border-color: var(--color-dark-500);
  background: var(--color-dark-800);
}

.cta-trust {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  gap: 1.25rem;
  margin-top: 2.5rem;
  color: var(--color-dark-500);
  font-size: 0.8125rem;
}

.cta-trust-item {
  display: flex;
  align-items: center;
  gap: 0.375rem;
}

.cta-trust-item svg {
  width: 1.125rem;
  height: 1.125rem;
  color: var(--color-primary);
}

/* ========================================
   页脚
   ======================================== */
.footer {
  background: var(--color-dark-950);
  border-top: 1px solid var(--color-dark-800);
  padding: 3.5rem 0 2rem;
}

@media (min-width: 768px) {
  .footer { padding: 5rem 0 2rem; }
}

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

@media (min-width: 1024px) {
  .footer-grid { grid-template-columns: 2fr 1fr 1fr 1fr; }
}

.footer-brand {
  grid-column: span 2;
}

@media (min-width: 1024px) {
  .footer-brand { grid-column: span 1; }
}

.footer-logo {
  display: flex;
  align-items: center;
  gap: 0.625rem;
  font-size: 1.25rem;
  font-weight: 800;
  color: var(--color-white);
  margin-bottom: 1rem;
}

.footer-logo-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 2.25rem;
  height: 2.25rem;
  border-radius: var(--radius-md);
  background: linear-gradient(135deg, var(--color-primary), var(--color-accent));
  box-shadow: 0 4px 12px rgba(20, 184, 166, 0.3);
}

.footer-brand-desc {
  color: var(--color-dark-400);
  font-size: 0.875rem;
  line-height: 1.7;
  max-width: 18rem;
  margin-bottom: 1.25rem;
}

.footer-social {
  display: flex;
  gap: 0.5rem;
}

.footer-social a {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 2.25rem;
  height: 2.25rem;
  border-radius: var(--radius-sm);
  background: var(--color-dark-800);
  color: var(--color-dark-400);
  transition: all var(--transition);
}

.footer-social a:hover {
  background: var(--color-dark-700);
  color: var(--color-white);
}

.footer-social svg {
  width: 1rem;
  height: 1rem;
}

.footer-group h4 {
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--color-white);
  margin-bottom: 1rem;
}

.footer-group ul {
  display: flex;
  flex-direction: column;
  gap: 0.625rem;
}

.footer-group a {
  font-size: 0.875rem;
  color: var(--color-dark-400);
  transition: color var(--transition);
}

.footer-group a:hover {
  color: var(--color-white);
}

.footer-bottom {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.5rem;
  margin-top: 3rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--color-dark-800);
  font-size: 0.8125rem;
  color: var(--color-dark-500);
  text-align: center;
  line-height: 1.6;
}

@media (min-width: 640px) {
  .footer-bottom { flex-direction: row; justify-content: space-between; text-align: left; }
}

/* 联系方式列表 */
.footer-contact {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.footer-contact li {
  display: flex;
  align-items: flex-start;
  gap: 0.5rem;
  color: var(--color-dark-400);
  font-size: 0.8125rem;
  line-height: 1.6;
}

.footer-contact li svg {
  flex-shrink: 0;
  margin-top: 0.125rem;
  color: var(--color-dark-500);
}

.footer-contact a {
  color: var(--color-dark-400);
  transition: color var(--transition);
}

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

/* ICP 备案 */
.footer-icp {
  color: var(--color-dark-500);
  transition: color var(--transition);
}

.footer-icp:hover {
  color: var(--color-dark-300);
}

/* 底部分隔符 */
.footer-divider {
  color: var(--color-dark-700);
  margin: 0 0.5rem;
  display: none;
}

@media (min-width: 640px) {
  .footer-divider { display: inline; }
}

/* ========================================
   动画关键帧
   ======================================== */
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.5; }
}