/* ===========================
   合肥海仁鑫启科技有限公司 - 企业官网
   全站共享样式
   =========================== */

/* ===== CSS Variables ===== */
:root {
  --color-primary: #0A1628;
  --color-primary-light: #1a2a45;
  --color-accent: #2563EB;
  --color-accent-light: #3b82f6;
  --color-accent-dark: #1d4ed8;
  --color-gradient: linear-gradient(135deg, #2563EB 0%, #0EA5E9 100%);
  --color-gradient-dark: linear-gradient(135deg, #0A1628 0%, #16284a 100%);
  --color-text: #1e293b;
  --color-text-light: #64748b;
  --color-text-white: #f8fafc;
  --color-bg: #ffffff;
  --color-bg-light: #f8fafc;
  --color-bg-section: #f1f5f9;
  --color-border: #e2e8f0;
  --color-success: #10b981;
  --color-shadow: 0 4px 6px -1px rgba(0,0,0,0.07), 0 2px 4px -1px rgba(0,0,0,0.04);
  --color-shadow-lg: 0 10px 30px -3px rgba(0,0,0,0.1), 0 4px 6px -2px rgba(0,0,0,0.05);
  --color-shadow-xl: 0 20px 50px -5px rgba(0,0,0,0.12), 0 10px 15px -3px rgba(0,0,0,0.04);
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 20px;
  --radius-full: 9999px;
  --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --max-width: 1200px;
  --header-height: 72px;
}

/* ===== Reset ===== */
*, *::before, *::after {
  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", "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Helvetica, Arial, sans-serif;
  color: var(--color-text);
  background: var(--color-bg);
  line-height: 1.7;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

ul, ol {
  list-style: none;
}

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

button {
  border: none;
  cursor: pointer;
  font-family: inherit;
}

input, textarea, select {
  font-family: inherit;
  font-size: inherit;
}

/* ===== Container ===== */
.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
}

/* ===== Section ===== */
.section {
  padding: 100px 0;
}

.section--gray {
  background: var(--color-bg-section);
}

.section--dark {
  background: var(--color-gradient-dark);
  color: var(--color-text-white);
}

.section-header {
  text-align: center;
  max-width: 680px;
  margin: 0 auto 60px;
}

.section-header .eyebrow {
  display: inline-block;
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--color-accent);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  margin-bottom: 12px;
  padding: 6px 16px;
  background: rgba(37, 99, 235, 0.08);
  border-radius: var(--radius-full);
}

.section-header h2 {
  font-size: 2.5rem;
  font-weight: 700;
  line-height: 1.3;
  margin-bottom: 16px;
  letter-spacing: -0.02em;
}

.section-header p {
  font-size: 1.125rem;
  color: var(--color-text-light);
  line-height: 1.8;
}

.section--dark .section-header h2 {
  color: var(--color-text-white);
}

.section--dark .section-header p {
  color: rgba(248, 250, 252, 0.7);
}

/* ===== Buttons ===== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 14px 32px;
  font-size: 1rem;
  font-weight: 600;
  border-radius: var(--radius-sm);
  transition: var(--transition);
  white-space: nowrap;
  cursor: pointer;
}

.btn--primary {
  background: var(--color-gradient);
  color: #fff;
  box-shadow: 0 4px 14px rgba(37, 99, 235, 0.3);
}

.btn--primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 25px rgba(37, 99, 235, 0.4);
}

.btn--outline {
  background: transparent;
  color: var(--color-accent);
  border: 2px solid var(--color-accent);
}

.btn--outline:hover {
  background: var(--color-accent);
  color: #fff;
}

.btn--white {
  background: #fff;
  color: var(--color-primary);
  box-shadow: var(--color-shadow);
}

.btn--white:hover {
  transform: translateY(-2px);
  box-shadow: var(--color-shadow-lg);
}

.btn--ghost-white {
  background: transparent;
  color: #fff;
  border: 2px solid rgba(255, 255, 255, 0.3);
}

.btn--ghost-white:hover {
  background: rgba(255, 255, 255, 0.1);
  border-color: rgba(255, 255, 255, 0.6);
}

.btn--lg {
  padding: 16px 40px;
  font-size: 1.0625rem;
}

/* ===== Header / Navigation ===== */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--header-height);
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  z-index: 1000;
  transition: var(--transition);
  border-bottom: 1px solid transparent;
}

.header--scrolled {
  box-shadow: var(--color-shadow);
  border-bottom-color: var(--color-border);
}

.header--dark {
  background: rgba(10, 22, 40, 0.95);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
}

.header--dark .nav__logo-text {
  color: #fff;
}

.header--dark .nav__link {
  color: rgba(248, 250, 252, 0.8);
}

.header--dark .nav__link:hover,
.header--dark .nav__link.active {
  color: #fff;
}

.header--dark .nav__toggle span {
  background: #fff;
}

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

.nav__logo {
  display: flex;
  align-items: center;
  gap: 12px;
}

.nav__logo-icon {
  width: 40px;
  height: 40px;
  background: var(--color-gradient);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.25rem;
  font-weight: 800;
  color: #fff;
  flex-shrink: 0;
}

.nav__logo-text {
  font-size: 1.125rem;
  font-weight: 700;
  color: var(--color-primary);
  letter-spacing: -0.01em;
}

.nav__logo-text small {
  display: block;
  font-size: 0.6875rem;
  font-weight: 500;
  color: var(--color-text-light);
  letter-spacing: 0.02em;
}

.header--dark .nav__logo-text small {
  color: rgba(248, 250, 252, 0.6);
}

.nav__menu {
  display: flex;
  align-items: center;
  gap: 8px;
}

.nav__link {
  padding: 8px 18px;
  font-size: 0.9375rem;
  font-weight: 500;
  color: var(--color-text);
  border-radius: var(--radius-sm);
  transition: var(--transition);
  position: relative;
}

.nav__link:hover {
  color: var(--color-accent);
}

.nav__link.active {
  color: var(--color-accent);
  font-weight: 600;
}

.nav__link.active::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 50%;
  transform: translateX(-50%);
  width: 24px;
  height: 3px;
  background: var(--color-accent);
  border-radius: 2px;
}

.nav__cta {
  margin-left: 12px;
  padding: 10px 24px;
  font-size: 0.875rem;
}

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

.nav__toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--color-primary);
  border-radius: 2px;
  transition: var(--transition);
}

/* ===== Hero ===== */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  background: var(--color-gradient-dark);
  color: #fff;
  overflow: hidden;
  padding-top: var(--header-height);
}

.hero__bg {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background:
    radial-gradient(ellipse at 20% 30%, rgba(37, 99, 235, 0.25) 0%, transparent 50%),
    radial-gradient(ellipse at 80% 70%, rgba(14, 165, 233, 0.2) 0%, transparent 50%);
}

.hero__grid {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-image:
    linear-gradient(rgba(255,255,255,0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,0.03) 1px, transparent 1px);
  background-size: 60px 60px;
}

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

.hero__badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 18px;
  background: rgba(37, 99, 235, 0.15);
  border: 1px solid rgba(37, 99, 235, 0.3);
  border-radius: var(--radius-full);
  font-size: 0.875rem;
  color: var(--color-accent-light);
  margin-bottom: 28px;
}

.hero__badge::before {
  content: '';
  width: 8px;
  height: 8px;
  background: var(--color-accent-light);
  border-radius: 50%;
  animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.5; transform: scale(1.3); }
}

.hero__title {
  font-size: 3.75rem;
  font-weight: 800;
  line-height: 1.2;
  letter-spacing: -0.03em;
  margin-bottom: 24px;
}

.hero__title .gradient-text {
  background: var(--color-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero__subtitle {
  font-size: 1.25rem;
  color: rgba(248, 250, 252, 0.7);
  line-height: 1.8;
  margin-bottom: 40px;
  max-width: 580px;
}

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

.hero__stats {
  display: flex;
  gap: 48px;
  margin-top: 64px;
  padding-top: 40px;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.hero__stat-num {
  font-size: 2.5rem;
  font-weight: 800;
  background: var(--color-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero__stat-label {
  font-size: 0.875rem;
  color: rgba(248, 250, 252, 0.6);
  margin-top: 4px;
}

/* ===== Page Banner (inner pages) ===== */
.page-banner {
  position: relative;
  padding: calc(var(--header-height) + 80px) 0 80px;
  background: var(--color-gradient-dark);
  color: #fff;
  text-align: center;
  overflow: hidden;
}

.page-banner__bg {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background:
    radial-gradient(ellipse at 30% 40%, rgba(37, 99, 235, 0.2) 0%, transparent 50%),
    radial-gradient(ellipse at 70% 60%, rgba(14, 165, 233, 0.15) 0%, transparent 50%);
}

.page-banner__grid {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-image:
    linear-gradient(rgba(255,255,255,0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,0.03) 1px, transparent 1px);
  background-size: 60px 60px;
}

.page-banner__content {
  position: relative;
  z-index: 2;
}

.page-banner h1 {
  font-size: 3rem;
  font-weight: 800;
  letter-spacing: -0.02em;
  margin-bottom: 16px;
}

.page-banner p {
  font-size: 1.125rem;
  color: rgba(248, 250, 252, 0.7);
  max-width: 600px;
  margin: 0 auto;
}

.breadcrumb {
  display: flex;
  justify-content: center;
  gap: 8px;
  margin-top: 24px;
  font-size: 0.875rem;
  color: rgba(248, 250, 252, 0.5);
}

.breadcrumb a:hover {
  color: #fff;
}

/* ===== Card Grid ===== */
.card-grid {
  display: grid;
  gap: 28px;
}

.card-grid--2 { grid-template-columns: repeat(2, 1fr); }
.card-grid--3 { grid-template-columns: repeat(3, 1fr); }
.card-grid--4 { grid-template-columns: repeat(4, 1fr); }

/* ===== Product Card ===== */
.product-card {
  background: #fff;
  border-radius: var(--radius-lg);
  padding: 40px 32px;
  box-shadow: var(--color-shadow);
  border: 1px solid var(--color-border);
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}

.product-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: var(--color-gradient);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.4s ease;
}

.product-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--color-shadow-xl);
  border-color: transparent;
}

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

.product-card__icon {
  width: 64px;
  height: 64px;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.75rem;
  margin-bottom: 24px;
  background: linear-gradient(135deg, rgba(37, 99, 235, 0.1), rgba(14, 165, 233, 0.1));
}

.product-card__title {
  font-size: 1.375rem;
  font-weight: 700;
  margin-bottom: 12px;
  color: var(--color-primary);
}

.product-card__desc {
  font-size: 0.9375rem;
  color: var(--color-text-light);
  line-height: 1.8;
  margin-bottom: 20px;
}

.product-card__features {
  margin-bottom: 24px;
}

.product-card__features li {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  font-size: 0.9375rem;
  color: var(--color-text);
  margin-bottom: 10px;
}

.product-card__features li::before {
  content: '\2713';
  color: var(--color-accent);
  font-weight: 700;
  flex-shrink: 0;
  margin-top: 1px;
}

.product-card__link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 0.9375rem;
  font-weight: 600;
  color: var(--color-accent);
  transition: var(--transition);
}

.product-card__link:hover {
  gap: 12px;
}

/* ===== Feature Block ===== */
.feature-block {
  display: flex;
  gap: 20px;
  padding: 28px;
  border-radius: var(--radius-md);
  background: #fff;
  border: 1px solid var(--color-border);
  transition: var(--transition);
}

.feature-block:hover {
  box-shadow: var(--color-shadow-lg);
  border-color: transparent;
}

.feature-block__icon {
  width: 52px;
  height: 52px;
  flex-shrink: 0;
  border-radius: var(--radius-sm);
  background: linear-gradient(135deg, rgba(37, 99, 235, 0.1), rgba(14, 165, 233, 0.1));
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
}

.feature-block__title {
  font-size: 1.125rem;
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: 8px;
}

.feature-block__desc {
  font-size: 0.9375rem;
  color: var(--color-text-light);
  line-height: 1.7;
}

/* ===== About Section ===== */
.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items: center;
}

.about-text h2 {
  font-size: 2.25rem;
  font-weight: 700;
  margin-bottom: 24px;
  letter-spacing: -0.02em;
  color: var(--color-primary);
}

.about-text p {
  font-size: 1.0625rem;
  color: var(--color-text-light);
  line-height: 1.9;
  margin-bottom: 20px;
}

.about-text .highlight {
  color: var(--color-accent);
  font-weight: 600;
}

.about-visual {
  position: relative;
}

.about-visual__card {
  background: var(--color-gradient-dark);
  border-radius: var(--radius-lg);
  padding: 48px;
  color: #fff;
  position: relative;
  overflow: hidden;
}

.about-visual__card::before {
  content: '';
  position: absolute;
  top: -50%;
  right: -30%;
  width: 400px;
  height: 400px;
  background: radial-gradient(circle, rgba(37, 99, 235, 0.3) 0%, transparent 70%);
  border-radius: 50%;
}

.about-visual__stats {
  position: relative;
  z-index: 2;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 32px;
}

.about-visual__stat {
  text-align: center;
}

.about-visual__num {
  font-size: 2.5rem;
  font-weight: 800;
  background: var(--color-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.about-visual__label {
  font-size: 0.9375rem;
  color: rgba(248, 250, 252, 0.6);
  margin-top: 4px;
}

/* ===== Values Cards ===== */
.values-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}

.value-card {
  text-align: center;
  padding: 40px 24px;
  border-radius: var(--radius-md);
  background: #fff;
  border: 1px solid var(--color-border);
  transition: var(--transition);
}

.value-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--color-shadow-lg);
  border-color: transparent;
}

.value-card__icon {
  width: 72px;
  height: 72px;
  margin: 0 auto 24px;
  border-radius: 50%;
  background: linear-gradient(135deg, rgba(37, 99, 235, 0.08), rgba(14, 165, 233, 0.08));
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 2rem;
}

.value-card__title {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: 12px;
}

.value-card__desc {
  font-size: 0.9375rem;
  color: var(--color-text-light);
  line-height: 1.7;
}

/* ===== Timeline ===== */
.timeline {
  position: relative;
  max-width: 800px;
  margin: 0 auto;
  padding-left: 40px;
}

.timeline::before {
  content: '';
  position: absolute;
  left: 12px;
  top: 8px;
  bottom: 8px;
  width: 2px;
  background: linear-gradient(to bottom, var(--color-accent), var(--color-accent-light), transparent);
}

.timeline__item {
  position: relative;
  padding-bottom: 40px;
}

.timeline__item:last-child {
  padding-bottom: 0;
}

.timeline__dot {
  position: absolute;
  left: -34px;
  top: 4px;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: #fff;
  border: 3px solid var(--color-accent);
  box-shadow: 0 0 0 4px rgba(37, 99, 235, 0.1);
}

.timeline__year {
  font-size: 1.25rem;
  font-weight: 800;
  color: var(--color-accent);
  margin-bottom: 8px;
}

.timeline__title {
  font-size: 1.125rem;
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: 8px;
}

.timeline__desc {
  font-size: 0.9375rem;
  color: var(--color-text-light);
  line-height: 1.7;
}

/* ===== Stats Section ===== */
.stats-row {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 32px;
}

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

.stat-item__num {
  font-size: 3rem;
  font-weight: 800;
  background: var(--color-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  line-height: 1.1;
}

.stat-item__label {
  font-size: 1rem;
  color: var(--color-text-light);
  margin-top: 8px;
}

.section--dark .stat-item__label {
  color: rgba(248, 250, 252, 0.7);
}

/* ===== Product Detail ===== */
.product-detail {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items: center;
  margin-bottom: 100px;
}

.product-detail:last-child {
  margin-bottom: 0;
}

.product-detail--reverse .product-detail__visual {
  order: -1;
}

.product-detail__content h3 {
  font-size: 2rem;
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: 20px;
  letter-spacing: -0.02em;
}

.product-detail__content > p {
  font-size: 1.0625rem;
  color: var(--color-text-light);
  line-height: 1.9;
  margin-bottom: 28px;
}

.product-detail__list {
  margin-bottom: 32px;
}

.product-detail__list li {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  margin-bottom: 16px;
  font-size: 1rem;
  color: var(--color-text);
}

.product-detail__list li::before {
  content: '';
  width: 24px;
  height: 24px;
  flex-shrink: 0;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--color-accent), var(--color-accent-light));
  margin-top: 2px;
  position: relative;
}

.product-detail__list li::after {
  content: '\2713';
  position: absolute;
  left: 7px;
  top: 2px;
  color: #fff;
  font-size: 0.75rem;
  font-weight: 700;
}

.product-detail__visual {
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: var(--color-gradient-dark);
  min-height: 380px;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  padding: 48px;
}

.product-detail__visual::before {
  content: '';
  position: absolute;
  top: -30%;
  right: -20%;
  width: 300px;
  height: 300px;
  background: radial-gradient(circle, rgba(37, 99, 235, 0.25) 0%, transparent 70%);
  border-radius: 50%;
}

.product-detail__visual-icon {
  font-size: 5rem;
  position: relative;
  z-index: 2;
}

.product-detail__visual-label {
  position: relative;
  z-index: 2;
  color: #fff;
  font-size: 1.5rem;
  font-weight: 700;
  margin-top: 16px;
}

.product-detail__visual-content {
  position: relative;
  z-index: 2;
  text-align: center;
}

/* ===== Contact Section ===== */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1.2fr;
  gap: 60px;
}

.contact-info__item {
  display: flex;
  gap: 20px;
  margin-bottom: 32px;
}

.contact-info__icon {
  width: 56px;
  height: 56px;
  flex-shrink: 0;
  border-radius: var(--radius-md);
  background: linear-gradient(135deg, rgba(37, 99, 235, 0.08), rgba(14, 165, 233, 0.08));
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
}

.contact-info__label {
  font-size: 0.8125rem;
  color: var(--color-text-light);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 4px;
}

.contact-info__value {
  font-size: 1.0625rem;
  font-weight: 600;
  color: var(--color-primary);
}

.contact-info__value a {
  color: var(--color-accent);
}

/* ===== Contact Form ===== */
.contact-form {
  background: #fff;
  border-radius: var(--radius-lg);
  padding: 48px;
  box-shadow: var(--color-shadow-lg);
  border: 1px solid var(--color-border);
}

.form-group {
  margin-bottom: 24px;
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
}

.form-label {
  display: block;
  font-size: 0.9375rem;
  font-weight: 600;
  color: var(--color-primary);
  margin-bottom: 8px;
}

.form-label .required {
  color: #ef4444;
}

.form-input,
.form-textarea,
.form-select {
  width: 100%;
  padding: 14px 18px;
  border: 2px solid var(--color-border);
  border-radius: var(--radius-sm);
  font-size: 1rem;
  color: var(--color-text);
  background: var(--color-bg-light);
  transition: var(--transition);
}

.form-input:focus,
.form-textarea:focus,
.form-select:focus {
  outline: none;
  border-color: var(--color-accent);
  background: #fff;
  box-shadow: 0 0 0 4px rgba(37, 99, 235, 0.08);
}

.form-textarea {
  resize: vertical;
  min-height: 130px;
}

.form-success {
  display: none;
  padding: 16px 20px;
  background: rgba(16, 185, 129, 0.1);
  border: 1px solid rgba(16, 185, 129, 0.3);
  border-radius: var(--radius-sm);
  color: var(--color-success);
  font-size: 0.9375rem;
  margin-bottom: 24px;
}

.form-success.show {
  display: flex;
  align-items: center;
  gap: 10px;
}

/* ===== CTA Section ===== */
.cta-section {
  position: relative;
  padding: 80px 0;
  background: var(--color-gradient);
  color: #fff;
  text-align: center;
  overflow: hidden;
}

.cta-section::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background:
    radial-gradient(ellipse at 20% 50%, rgba(255,255,255,0.1) 0%, transparent 50%),
    radial-gradient(ellipse at 80% 50%, rgba(255,255,255,0.08) 0%, transparent 50%);
}

.cta-section__content {
  position: relative;
  z-index: 2;
}

.cta-section h2 {
  font-size: 2.5rem;
  font-weight: 800;
  margin-bottom: 16px;
  letter-spacing: -0.02em;
}

.cta-section p {
  font-size: 1.125rem;
  color: rgba(255, 255, 255, 0.85);
  margin-bottom: 32px;
}

/* ===== Footer ===== */
.footer {
  background: var(--color-primary);
  color: rgba(248, 250, 252, 0.7);
  padding: 72px 0 0;
}

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

.footer__brand {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 20px;
}

.footer__brand-icon {
  width: 40px;
  height: 40px;
  background: var(--color-gradient);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.25rem;
  font-weight: 800;
  color: #fff;
}

.footer__brand-text {
  font-size: 1.125rem;
  font-weight: 700;
  color: #fff;
}

.footer__about {
  font-size: 0.9375rem;
  line-height: 1.8;
  max-width: 320px;
  margin-bottom: 24px;
}

.footer__col-title {
  font-size: 1rem;
  font-weight: 700;
  color: #fff;
  margin-bottom: 20px;
}

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

.footer__col ul li a {
  font-size: 0.9375rem;
  color: rgba(248, 250, 252, 0.6);
  transition: var(--transition);
}

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

.footer__contact-item {
  font-size: 0.9375rem;
  color: rgba(248, 250, 252, 0.6);
  margin-bottom: 12px;
  display: flex;
  align-items: flex-start;
  gap: 8px;
}

.footer__bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  padding: 24px 0;
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.875rem;
  color: rgba(248, 250, 252, 0.5);
}

.footer__bottom a {
  color: rgba(248, 250, 252, 0.6);
  transition: var(--transition);
}

.footer__bottom a:hover {
  color: #fff;
}

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

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

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

/* ===== Responsive ===== */
@media (max-width: 1024px) {
  .hero__title { font-size: 2.75rem; }
  .card-grid--4 { grid-template-columns: repeat(2, 1fr); }
  .values-grid { grid-template-columns: repeat(2, 1fr); }
  .stats-row { grid-template-columns: repeat(2, 1fr); }
  .footer__grid { grid-template-columns: 1fr 1fr; gap: 36px; }
}

@media (max-width: 768px) {
  .section { padding: 64px 0; }
  .section-header h2 { font-size: 1.875rem; }
  .section-header { margin-bottom: 40px; }

  .nav__menu {
    position: fixed;
    top: var(--header-height);
    left: 0;
    right: 0;
    background: #fff;
    flex-direction: column;
    padding: 24px;
    gap: 4px;
    box-shadow: var(--color-shadow-lg);
    transform: translateY(-200%);
    transition: transform 0.3s ease;
    border-top: 1px solid var(--color-border);
  }

  .nav__menu.open {
    transform: translateY(0);
  }

  .nav__menu .nav__link {
    width: 100%;
    padding: 14px 18px;
  }

  .nav__cta {
    margin-left: 0;
    margin-top: 8px;
    width: 100%;
  }

  .nav__toggle {
    display: flex;
  }

  .hero { min-height: auto; padding: calc(var(--header-height) + 60px) 0 60px; }
  .hero__title { font-size: 2.25rem; }
  .hero__subtitle { font-size: 1.0625rem; }
  .hero__stats { flex-wrap: wrap; gap: 28px; }
  .hero__stat-num { font-size: 1.875rem; }

  .page-banner { padding: calc(var(--header-height) + 60px) 0 60px; }
  .page-banner h1 { font-size: 2.25rem; }

  .card-grid--2,
  .card-grid--3,
  .card-grid--4 { grid-template-columns: 1fr; }

  .about-grid,
  .product-detail,
  .contact-grid { grid-template-columns: 1fr; gap: 40px; }

  .product-detail--reverse .product-detail__visual { order: 0; }

  .values-grid { grid-template-columns: 1fr; }
  .stats-row { grid-template-columns: 1fr 1fr; gap: 24px; }

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

  .contact-form { padding: 32px 24px; }

  .footer__grid { grid-template-columns: 1fr; gap: 32px; }
  .footer__bottom { flex-direction: column; gap: 12px; text-align: center; }

  .cta-section h2 { font-size: 1.875rem; }
  .cta-section p { font-size: 1rem; }

  .timeline { padding-left: 32px; }
}

@media (max-width: 480px) {
  .hero__title { font-size: 1.875rem; }
  .hero__actions { flex-direction: column; }
  .hero__actions .btn { width: 100%; }
  .stats-row { grid-template-columns: 1fr; }
  .page-banner h1 { font-size: 1.875rem; }
  .section-header h2 { font-size: 1.625rem; }
}

/* ===== Footer 备案信息区（合规） ===== */
.footer__beian {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px;
  color: rgba(248, 250, 252, 0.6);
}

.footer__beian a {
  display: inline-flex;
  align-items: center;
  gap: 4px;
}

.beian-icon {
  display: inline-block;
  vertical-align: -2px;
  opacity: 0.85;
}

/* ===== 留资表单兜底卡片（contact 页） ===== */
.form-fallback {
  text-align: center;
  padding: 48px 24px;
  border: 1px dashed rgba(37, 99, 235, 0.25);
  border-radius: 16px;
  background: linear-gradient(180deg, rgba(37, 99, 235, 0.04), rgba(37, 99, 235, 0.01));
}

.form-fallback__icon { font-size: 2.5rem; margin-bottom: 12px; }

.form-fallback__title {
  font-size: 1.125rem;
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: 8px;
}

.form-fallback__desc {
  font-size: 0.9375rem;
  color: var(--color-text-light);
  margin-bottom: 20px;
}

.form-fallback__actions {
  display: flex;
  gap: 12px;
  justify-content: center;
  flex-wrap: wrap;
  margin-bottom: 16px;
}

.form-fallback__wechat {
  font-size: 0.875rem;
  color: var(--color-text-light);
}

.form-fallback__wechat strong { color: var(--color-primary); }