:root {
  --bg-white:    #ffffff;
  --bg-light:    #f5faf6;
  --bg-card:     #ffffff;
  --bg-surface:  #eef5ef;
  --border:      #d4e5d6;
  --border-light:#e8f2e9;
  --text-primary:   #1a2e1a;
  --text-secondary: #4a6a4a;
  --text-muted:     #7a9a7a;
  --accent:       #4a9e4f;
  --accent-light: #6dbb70;
  --accent-bg:    rgba(74,158,79,0.06);
  --accent-bg-hover: rgba(74,158,79,0.12);
  --gradient-accent: linear-gradient(135deg, #4a9e4f, #66bb6a);
  --radius: 12px;
  --radius-lg: 20px;
  --shadow-sm: 0 2px 12px rgba(0,0,0,0.04);
  --shadow-md: 0 4px 24px rgba(0,0,0,0.06);
  --shadow-lg: 0 8px 40px rgba(0,0,0,0.08);
}

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

html { scroll-behavior: smooth; scroll-padding-top: 72px; }

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", "Hiragino Sans GB", "Helvetica Neue", Arial, sans-serif;
  background: var(--bg-white);
  color: var(--text-primary);
  line-height: 1.6;
  overflow-x: hidden;
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
  position: relative;
  z-index: 1;
}

/* ===== 顶部导航 ===== */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: rgba(255,255,255,0.94);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border-light);
  transition: all 0.3s;
}

.header.scrolled { box-shadow: 0 2px 20px rgba(0,0,0,0.06); }

.header-inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
}

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
}

.logo-img {
  height: 40px;
  width: auto;
  object-fit: contain;
}

.logo-text {
  font-size: 16px;
  font-weight: 700;
  color: var(--text-primary);
  white-space: nowrap;
}

.nav-links {
  display: flex;
  list-style: none;
  gap: 4px;
}

.nav-links a {
  display: block;
  padding: 8px 18px;
  border-radius: 8px;
  font-size: 14px;
  font-weight: 500;
  color: var(--text-secondary);
  text-decoration: none;
  transition: all 0.25s;
}

.nav-links a:hover,
.nav-links a.active {
  color: var(--accent);
  background: var(--accent-bg);
}

.menu-toggle {
  display: none;
  background: none;
  border: none;
  width: 36px;
  height: 36px;
  cursor: pointer;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 5px;
  padding: 4px;
}

.menu-toggle span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--text-secondary);
  border-radius: 2px;
  transition: all 0.3s;
}

.menu-toggle.open span:nth-child(1) { transform: rotate(45deg) translate(5px, 5px); background: var(--accent); }
.menu-toggle.open span:nth-child(2) { opacity: 0; }
.menu-toggle.open span:nth-child(3) { transform: rotate(-45deg) translate(5px, -5px); background: var(--accent); }

/* ===== 区块通用 ===== */
.section { padding: 100px 0; position: relative; }
.section-top { padding: 120px 0 100px; position: relative; }

.section-header {
  text-align: center;
  margin-bottom: 56px;
}

.section-tag {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 3px;
  color: var(--accent);
  margin-bottom: 16px;
}

.section-tag::before,
.section-tag::after {
  content: '';
  width: 28px;
  height: 1px;
  background: var(--accent);
  opacity: 0.3;
}

.section-title {
  font-size: clamp(26px, 3.5vw, 38px);
  font-weight: 800;
  color: var(--text-primary);
  line-height: 1.3;
  margin-bottom: 14px;
}

.section-title .hl {
  color: var(--accent);
}

.section-subtitle {
  font-size: 15px;
  color: var(--text-muted);
  max-width: 580px;
  margin: 0 auto;
  line-height: 1.7;
}

/* ===== Hero（首页）===== */
.hero {
  padding: 170px 0 120px;
  text-align: center;
  position: relative;
  background: linear-gradient(180deg, #f5faf6 0%, #ffffff 100%);
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 20px;
  background: var(--accent-bg);
  border: 1px solid var(--border);
  border-radius: 9999px;
  font-size: 13px;
  font-weight: 600;
  color: var(--accent);
  margin-bottom: 32px;
  letter-spacing: 0.5px;
}

.hero-badge .dot {
  width: 6px;
  height: 6px;
  background: var(--accent);
  border-radius: 50%;
  animation: pulse-dot 2s infinite;
}

@keyframes pulse-dot {
  0%, 100% { box-shadow: 0 0 0 0 rgba(74,158,79,0.5); }
  50% { box-shadow: 0 0 0 8px rgba(74,158,79,0); }
}

.hero h1 {
  font-size: clamp(36px, 5.5vw, 60px);
  font-weight: 900;
  color: var(--text-primary);
  line-height: 1.15;
  margin-bottom: 20px;
  letter-spacing: -0.5px;
}

.hero h1 .accent {
  color: var(--accent);
}

.hero-desc {
  font-size: clamp(15px, 1.8vw, 19px);
  color: var(--text-secondary);
  margin-bottom: 48px;
  line-height: 1.7;
  max-width: 620px;
  margin-left: auto;
  margin-right: auto;
}

.hero-stats {
  display: flex;
  gap: 56px;
  justify-content: center;
  flex-wrap: wrap;
  margin-bottom: 52px;
}

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

.hero-stat:not(:last-child)::after {
  content: '';
  position: absolute;
  right: -28px;
  top: 10%;
  height: 60%;
  width: 1px;
  background: var(--border);
}

.hero-stat .num {
  font-size: clamp(30px, 4.5vw, 48px);
  font-weight: 900;
  color: var(--accent);
  line-height: 1;
  font-variant-numeric: tabular-nums;
}

.hero-stat .lbl {
  font-size: 13px;
  color: var(--text-muted);
  margin-top: 10px;
  letter-spacing: 0.5px;
}

.btn-primary {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 14px 36px;
  background: var(--gradient-accent);
  color: #fff;
  border: none;
  border-radius: 9999px;
  font-size: 15px;
  font-weight: 700;
  cursor: pointer;
  text-decoration: none;
  transition: all 0.3s;
  box-shadow: 0 4px 20px rgba(74,158,79,0.25);
  letter-spacing: 0.5px;
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 28px rgba(74,158,79,0.35);
}

.btn-outline {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 14px 36px;
  background: transparent;
  color: var(--accent);
  border: 2px solid var(--border);
  border-radius: 9999px;
  font-size: 15px;
  font-weight: 600;
  cursor: pointer;
  text-decoration: none;
  transition: all 0.3s;
}

.btn-outline:hover {
  border-color: var(--accent);
  background: var(--accent-bg);
}

.hero-btns {
  display: flex;
  gap: 16px;
  justify-content: center;
  flex-wrap: wrap;
}

/* ===== 关于我们 ===== */
.section-alt { background: var(--bg-light); }

.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 56px;
  align-items: center;
}

.about-desc {
  font-size: 15px;
  color: var(--text-secondary);
  line-height: 1.85;
  margin-bottom: 28px;
}

.about-features {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.about-feature {
  display: flex;
  align-items: flex-start;
  gap: 16px;
  padding: 18px 22px;
  background: var(--bg-white);
  border-radius: var(--radius);
  border: 1px solid var(--border-light);
  transition: all 0.3s;
}

.about-feature:hover {
  border-color: var(--accent);
  box-shadow: var(--shadow-sm);
}

.about-feature .fi {
  width: 44px;
  height: 44px;
  min-width: 44px;
  background: var(--accent-bg);
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 20px;
}

.about-feature h4 {
  font-size: 15px;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 4px;
}

.about-feature p {
  font-size: 13px;
  color: var(--text-muted);
  line-height: 1.5;
}

.about-card {
  background: var(--bg-white);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-lg);
  padding: 44px;
  text-align: center;
  box-shadow: var(--shadow-md);
}

.about-card .big-icon {
  width: 80px;
  height: 80px;
  background: var(--accent-bg);
  border: 2px solid var(--border);
  border-radius: 20px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 36px;
  margin: 0 auto 24px;
}

.about-card h3 {
  font-size: 20px;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 10px;
}

.about-card > p {
  font-size: 14px;
  color: var(--text-muted);
  line-height: 1.6;
  margin-bottom: 28px;
}

.cert-list {
  display: flex;
  gap: 10px;
  justify-content: center;
  flex-wrap: wrap;
}

.cert-item {
  padding: 8px 16px;
  background: var(--accent-bg);
  color: var(--accent);
  border: 1px solid var(--border);
  border-radius: 8px;
  font-size: 13px;
  font-weight: 600;
}

/* ===== 核心业务 ===== */
.business-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.biz-card {
  background: var(--bg-white);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-lg);
  padding: 36px 28px;
  text-align: center;
  transition: all 0.35s;
  box-shadow: var(--shadow-sm);
}

.biz-card:hover {
  border-color: var(--accent);
  box-shadow: var(--shadow-lg);
  transform: translateY(-4px);
}

.biz-card .icon {
  width: 64px;
  height: 64px;
  background: var(--accent-bg);
  border-radius: 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 30px;
  margin: 0 auto 20px;
  transition: all 0.35s;
}

.biz-card:hover .icon {
  background: var(--gradient-accent);
}

.biz-card h3 {
  font-size: 17px;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 10px;
}

.biz-card p {
  font-size: 13px;
  color: var(--text-muted);
  line-height: 1.65;
}

/* ===== 光储充一体化详情 ===== */
.feature-detail-section .section-header {
  margin-bottom: 56px;
}

.feature-detail {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  align-items: center;
  margin-bottom: 56px;
}

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

.feature-detail.reverse {
  direction: rtl;
}

.feature-detail.reverse > * {
  direction: ltr;
}

.feature-detail-text h3 {
  font-size: 22px;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 24px;
}

.feature-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.feature-list li {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  font-size: 15px;
  color: var(--text-secondary);
  line-height: 1.7;
}

.feature-list .marker {
  width: 8px;
  height: 8px;
  min-width: 8px;
  margin-top: 9px;
  background: var(--accent);
  border-radius: 50%;
  box-shadow: 0 0 0 4px var(--accent-bg);
}

.feature-desc {
  font-size: 15px;
  color: var(--text-secondary);
  line-height: 1.85;
}

.feature-detail-img {
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-lg);
  border: 1px solid var(--border-light);
}

.feature-detail-img img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

/* ===== 系统优势及特点 ===== */
.advantage-section .section-header {
  margin-bottom: 56px;
}

.advantage-intro {
  display: grid;
  grid-template-areas:
    "top-left    center    top-right"
    "bottom-left center    bottom-right";
  grid-template-columns: 1fr 260px 1fr;
  grid-template-rows: 1fr 1fr;
  gap: 36px 48px;
  align-items: stretch;
  justify-items: stretch;
  max-width: 1100px;
  margin: 0 auto;
}

.advantage-center {
  width: 260px;
  height: 260px;
  border-radius: 50%;
  overflow: hidden;
  background: var(--bg-white);
  box-shadow: 0 12px 56px rgba(74, 158, 79, 0.18);
  border: 4px solid var(--accent-light);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
  transition: all 0.4s;
  align-self: center;
}

.advantage-center img {
  width: 100%;
  height: 100%;
  object-fit: contain;
  display: block;
}

.advantage-card {
  background: var(--bg-white);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-lg);
  padding: 28px;
  box-shadow: var(--shadow-sm);
  transition: all 0.35s;
  display: flex;
  flex-direction: column;
  height: 100%;
}

.advantage-card:hover {
  border-color: var(--accent);
  box-shadow: var(--shadow-lg);
  transform: translateY(-3px);
}

.advantage-num {
  display: inline-block;
  font-size: 13px;
  font-weight: 700;
  color: var(--accent);
  background: var(--accent-bg);
  padding: 4px 12px;
  border-radius: 20px;
  margin-bottom: 14px;
}

.advantage-card h4 {
  font-size: 17px;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 14px;
  line-height: 1.4;
}

.advantage-card ul {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 8px;
  flex: 1;
}

.advantage-card li {
  position: relative;
  padding-left: 18px;
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.6;
}

.advantage-card li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 10px;
  width: 6px;
  height: 6px;
  background: var(--accent-light);
  border-radius: 50%;
}

/* ===== 技术实力 ===== */
.tech-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  align-items: start;
}

.tech-list {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.tech-item {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 20px 24px;
  background: var(--bg-white);
  border: 1px solid var(--border-light);
  border-radius: var(--radius);
  transition: all 0.3s;
  box-shadow: var(--shadow-sm);
}

.tech-item:hover {
  border-color: var(--accent);
  box-shadow: var(--shadow-md);
}

.tech-item .n {
  width: 40px;
  height: 40px;
  min-width: 40px;
  background: var(--accent-bg);
  border: 1px solid var(--border);
  color: var(--accent);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 800;
  font-size: 14px;
}

.tech-item h4 {
  font-size: 15px;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 2px;
}

.tech-item p {
  font-size: 12px;
  color: var(--text-muted);
}

.tech-highlight {
  background: var(--bg-white);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-lg);
  padding: 48px 36px;
  text-align: center;
  box-shadow: var(--shadow-md);
}

.tech-highlight .big {
  font-size: 72px;
  font-weight: 900;
  line-height: 1;
  color: var(--accent);
  margin-bottom: 10px;
}

.tech-highlight .big-label {
  font-size: 16px;
  color: var(--text-secondary);
  margin-bottom: 36px;
}

.tech-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  justify-content: center;
}

.tech-tags span {
  padding: 8px 18px;
  background: var(--accent-bg);
  border: 1px solid var(--border);
  border-radius: 9999px;
  font-size: 13px;
  font-weight: 500;
  color: var(--accent);
}

/* ===== 联系我们 ===== */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1.3fr;
  gap: 52px;
  align-items: start;
}

.contact-info-list {
  display: flex;
  flex-direction: column;
  gap: 16px;
  margin-bottom: 24px;
}

.contact-info-item {
  display: flex;
  align-items: flex-start;
  gap: 16px;
  padding: 16px 20px;
  background: var(--bg-white);
  border: 1px solid var(--border-light);
  border-radius: var(--radius);
  transition: all 0.3s;
  box-shadow: var(--shadow-sm);
}

.contact-info-item:hover {
  border-color: var(--accent);
  box-shadow: var(--shadow-md);
}

.contact-info-item .ico {
  width: 46px;
  height: 46px;
  min-width: 46px;
  background: var(--accent-bg);
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 20px;
}

.contact-info-item h4 {
  font-size: 14px;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 2px;
}

.contact-info-item p {
  font-size: 14px;
  color: var(--text-muted);
}

.contact-qr-box {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 20px;
  background: var(--bg-white);
  border: 1px solid var(--border-light);
  border-radius: var(--radius);
  box-shadow: var(--shadow-sm);
}

.qr-placeholder {
  width: 84px;
  height: 84px;
  min-width: 84px;
  background: var(--bg-surface);
  border: 2px dashed var(--border);
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 11px;
  color: var(--text-muted);
  text-align: center;
  line-height: 1.4;
}

.qr-info h4 {
  font-size: 14px;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 4px;
}

.qr-info p {
  font-size: 12px;
  color: var(--text-muted);
}

.contact-form {
  background: var(--bg-white);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-lg);
  padding: 40px;
  box-shadow: var(--shadow-md);
}

.contact-form h3 {
  font-size: 20px;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 24px;
}

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

.form-group { margin-bottom: 16px; }

.form-group label {
  display: block;
  font-size: 13px;
  font-weight: 600;
  color: var(--text-secondary);
  margin-bottom: 6px;
}

.form-group input,
.form-group textarea,
.form-group select {
  width: 100%;
  padding: 12px 16px;
  background: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: 10px;
  font-size: 14px;
  color: var(--text-primary);
  transition: all 0.3s;
  font-family: inherit;
  resize: vertical;
}

.form-group input::placeholder,
.form-group textarea::placeholder { color: var(--text-muted); }

.form-group select {
  color: var(--text-secondary);
  cursor: pointer;
}

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(74,158,79,0.1);
}

.btn-submit {
  width: 100%;
  padding: 14px;
  background: var(--gradient-accent);
  color: #fff;
  border: none;
  border-radius: 12px;
  font-size: 16px;
  font-weight: 700;
  cursor: pointer;
  transition: all 0.3s;
  font-family: inherit;
  box-shadow: 0 4px 16px rgba(74,158,79,0.25);
}

.btn-submit:hover {
  box-shadow: 0 6px 24px rgba(74,158,79,0.35);
  transform: translateY(-1px);
}

/* ===== 页脚 ===== */
.footer {
  background: #f0f7f1;
  border-top: 1px solid var(--border-light);
  padding: 56px 0 28px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 40px;
  margin-bottom: 44px;
}

.footer-logo-wrap {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 16px;
}

.footer-logo-img {
  height: 36px;
  width: auto;
  object-fit: contain;
}

.footer-logo-text {
  font-size: 16px;
  font-weight: 700;
  color: var(--text-primary);
}

.footer-brand > p {
  font-size: 13px;
  line-height: 1.7;
  color: var(--text-muted);
}

.footer-col h4 {
  font-size: 13px;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 18px;
  letter-spacing: 1px;
}

.footer-col ul {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.footer-col ul li a {
  color: var(--text-muted);
  text-decoration: none;
  font-size: 13px;
  transition: color 0.2s;
}

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

.footer-bottom {
  border-top: 1px solid var(--border-light);
  padding-top: 24px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 13px;
  color: var(--text-muted);
  flex-wrap: wrap;
  gap: 12px;
}

.footer-bottom .links {
  display: flex;
  gap: 20px;
}

.footer-bottom .links a {
  color: var(--text-muted);
  text-decoration: none;
  font-size: 13px;
}

.footer-bottom .links a:hover { color: var(--accent); }

.footer-bottom a.icp-link {
  color: var(--text-muted);
  text-decoration: none;
  transition: color 0.2s;
}
.footer-bottom a.icp-link:hover {
  color: var(--accent);
  text-decoration: underline;
}

/* ===== Toast ===== */
.toast {
  position: fixed;
  top: 24px;
  left: 50%;
  transform: translateX(-50%) translateY(-120px);
  background: var(--accent);
  color: #fff;
  padding: 12px 30px;
  border-radius: 9999px;
  font-size: 14px;
  font-weight: 700;
  z-index: 9999;
  transition: transform 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
  box-shadow: 0 6px 24px rgba(74,158,79,0.3);
}

.toast.show { transform: translateX(-50%) translateY(0); }

/* ===== 回到顶部 ===== */
.back-to-top {
  position: fixed;
  bottom: 32px;
  right: 32px;
  width: 44px;
  height: 44px;
  background: var(--bg-white);
  border: 1px solid var(--border);
  color: var(--accent);
  border-radius: 50%;
  font-size: 18px;
  cursor: pointer;
  opacity: 0;
  pointer-events: none;
  transition: all 0.3s;
  z-index: 999;
  box-shadow: var(--shadow-md);
}

.back-to-top.visible {
  opacity: 1;
  pointer-events: auto;
}

.back-to-top:hover {
  border-color: var(--accent);
  background: var(--accent);
  color: #fff;
  transform: translateY(-2px);
}

/* ===== 响应式 ===== */
@media (max-width: 900px) {
  .header-inner { height: 56px; }

  .menu-toggle { display: flex; }

  .nav-links {
    position: fixed;
    top: 56px;
    left: 0;
    right: 0;
    background: rgba(255,255,255,0.98);
    backdrop-filter: blur(12px);
    flex-direction: column;
    padding: 16px;
    border-bottom: 1px solid var(--border-light);
    box-shadow: var(--shadow-md);
    transform: translateY(-120%);
    transition: transform 0.3s;
    gap: 2px;
  }

  .nav-links.open { transform: translateY(0); }

  .section { padding: 80px 0; }
  .section-top { padding: 100px 0 80px; }
  .hero { padding: 130px 0 80px; }
  .hero-stats { gap: 28px; }

  .hero-stat:not(:last-child)::after { display: none; }

  .about-grid,
  .tech-grid,
  .contact-grid,
  .feature-detail { grid-template-columns: 1fr; gap: 36px; }

  .feature-detail.reverse { direction: ltr; }

  .feature-detail-text h3 { font-size: 20px; margin-bottom: 20px; }

  .feature-detail-img { order: -1; }

  .business-grid { grid-template-columns: 1fr 1fr; gap: 16px; }

  .advantage-intro {
    grid-template-areas:
      "top-left"
      "top-right"
      "center"
      "bottom-left"
      "bottom-right";
    grid-template-columns: 1fr;
    grid-template-rows: auto;
    gap: 20px;
  }

  .advantage-center { width: 180px; height: 180px; margin: 12px auto; }

  .advantage-card { max-width: 480px; width: 100%; }

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

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

@media (max-width: 560px) {
  .business-grid { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; }
  .footer-bottom { flex-direction: column; text-align: center; }
  .hero-btns { flex-direction: column; align-items: center; }
  .hero-btns .btn-primary,
  .hero-btns .btn-outline { width: 100%; justify-content: center; }
  .hero-stat .num { font-size: 32px; }
}