/* ========== 一感智能科技 全局样式 ========== */

/* -- CSS Variables -- */
:root {
  --primary: #1a56db;
  --primary-light: #3b82f6;
  --primary-dark: #1e40af;
  --primary-9: #1e3a8a;
  --primary-8: #1e40af;
  --accent: #06b6d4;
  --bg: #ffffff;
  --bg-light: #f0f5ff;
  --bg-gray: #f8fafc;
  --bg-dark: #0f172a;
  --text: #1e293b;
  --text-light: #64748b;
  --text-white: #ffffff;
  --border: #e2e8f0;
  --radius: 8px;
  --radius-lg: 12px;
  --shadow: 0 2px 8px rgba(0,0,0,.06);
  --shadow-lg: 0 8px 24px rgba(0,0,0,.1);
  --transition: .3s ease;
  --container: 1200px;
}

/* -- Reset -- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; overflow-x: hidden; }
body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  color: var(--text);
  background: var(--bg);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}
a { text-decoration: none; color: inherit; }
ul, ol { list-style: none; }
img { max-width: 100%; display: block; }
button { cursor: pointer; border: none; background: none; font: inherit; }

/* -- Container -- */
.container { max-width: 1440px; margin: 0 auto; padding: 0 40px; box-sizing: border-box; }

/* ========== Header ========== */
.header {
  position: fixed; top: 0; left: 0; width: 100%; z-index: 1000;
  background: rgba(255,255,255,.95); backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border);
  transition: box-shadow var(--transition);
}
.header.scrolled { box-shadow: 0 2px 12px rgba(0,0,0,.08); }
.header .container {
  display: flex; align-items: center; justify-content: space-between;
  height: 72px;
}
.logo {
  display: flex; align-items: center; gap: 8px;
  font-size: 20px; font-weight: 700; color: var(--primary);
}
.logo img { height: 36px; }

/* Nav */
.nav { display: flex; align-items: center; gap: 4px; }
.nav-item {
  position: relative; padding: 8px 16px; font-size: 15px; color: var(--text);
  border-radius: 6px; transition: color var(--transition), background var(--transition);
  cursor: pointer; white-space: nowrap;
}
.nav-item:hover, .nav-item.active { color: var(--primary); background: var(--bg-light); }
.nav-item .arrow { font-size: 10px; margin-left: 2px; transition: transform var(--transition); }
.nav-item:hover .arrow { transform: rotate(180deg); }

/* Dropdown */
.dropdown {
  position: absolute; top: 100%; left: 0; min-width: 180px;
  background: #fff; border-radius: var(--radius); border: 1px solid var(--border);
  box-shadow: var(--shadow-lg); padding: 8px 0;
  opacity: 0; visibility: hidden; transform: translateY(8px);
  transition: all var(--transition);
}
.nav-item:hover .dropdown { opacity: 1; visibility: visible; transform: translateY(0); }
.dropdown a {
  display: block; padding: 10px 20px; font-size: 14px; color: var(--text);
  transition: background var(--transition), color var(--transition);
}
.dropdown a:hover { background: var(--bg-light); color: var(--primary); }

/* Header Right */
.header-right { display: flex; align-items: center; gap: 16px; }
.header-phone {
  display: flex; align-items: center; gap: 6px;
  font-size: 14px; color: var(--text-light);
}
.header-phone svg { flex-shrink: 0; }

/* Mobile menu toggle */
.menu-toggle {
  display: none; flex-direction: column; gap: 5px; cursor: pointer;
  width: 28px; padding: 4px 0;
}
.menu-toggle span {
  display: block; height: 2px; background: var(--text);
  border-radius: 2px; transition: all var(--transition);
}
.menu-toggle.active span:nth-child(1) { transform: rotate(45deg) translate(5px, 5px); }
.menu-toggle.active span:nth-child(2) { opacity: 0; }
.menu-toggle.active span:nth-child(3) { transform: rotate(-45deg) translate(5px, -5px); }

/* ========== Buttons ========== */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  padding: 12px 28px; font-size: 15px; font-weight: 600;
  border-radius: 6px; transition: all var(--transition);
  white-space: nowrap;
}
.btn-primary {
  background: var(--primary); color: #fff;
}
.btn-primary:hover { background: var(--primary-dark); transform: translateY(-1px); box-shadow: 0 4px 12px rgba(26,86,219,.3); }
.btn-outline {
  border: 2px solid var(--primary); color: var(--primary); background: transparent;
}
.btn-outline:hover { background: var(--primary); color: #fff; }
.btn-white {
  background: #fff; color: var(--primary);
}
.btn-white:hover { background: var(--bg-light); }
.btn-sm { padding: 8px 20px; font-size: 14px; }
.btn-lg { padding: 16px 36px; font-size: 16px; }

/* ========== Sections ========== */
.section { padding: 80px 0; }
.section-light { background: var(--bg-light); }
.section-gray { background: var(--bg-gray); }
.section-dark { background: var(--bg-dark); color: #fff; }
.section-blue { background: linear-gradient(135deg, var(--primary-9) 0%, var(--primary) 100%); color: #fff; }

.section-title { text-align: center; margin-bottom: 48px; }
.section-title h2 { font-size: 32px; font-weight: 700; margin-bottom: 12px; }
.section-title p { font-size: 16px; color: var(--text-light); max-width: 600px; margin: 0 auto; }
.section-dark .section-title p,
.section-blue .section-title p { color: rgba(255,255,255,.7); }

/* ========== Page Banner ========== */
.page-banner {
  padding: 140px 0 80px;
  background: linear-gradient(135deg, var(--primary-9) 0%, var(--primary) 60%, var(--accent) 100%);
  color: #fff; text-align: center;
}
.page-banner h1 { font-size: 42px; font-weight: 700; margin-bottom: 16px; }
.page-banner p { font-size: 18px; opacity: .85; max-width: 600px; margin: 0 auto; }

/* ========== Product Video Section ========== */
.product-video {
  background: #f5f7fa;
  padding: 80px 0;
}
.product-video .section-header {
  text-align: center;
  margin-bottom: 40px;
}
.product-video .section-header h2 {
  font-size: 32px;
  font-weight: 700;
  margin-bottom: 12px;
}
.product-video .blue-line {
  width: 40px;
  height: 3px;
  background: var(--primary);
  margin: 0 auto;
}
.video-wrapper {
  max-width: 960px;
  margin: 0 auto;
  border-radius: 8px;
  overflow: hidden;
  aspect-ratio: 16 / 9;
  background: #000;
}
.video-wrapper video {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

/* ========== Hero Banner ========== */
.hero {
  position: relative; padding: 160px 0 100px;
  background: linear-gradient(135deg, var(--primary-9) 0%, var(--primary) 50%, var(--accent) 100%);
  color: #fff; overflow: hidden;
}
.hero::before {
  content: ''; position: absolute; top: 0; left: 0; width: 100%; height: 100%;
  background: radial-gradient(ellipse at 30% 50%, rgba(255,255,255,.08) 0%, transparent 60%);
}
.hero .container { position: relative; z-index: 1; }
.hero-content { max-width: 640px; }
.hero-tag {
  display: inline-block; padding: 6px 16px; font-size: 13px; font-weight: 500;
  background: rgba(255,255,255,.15); border-radius: 20px; margin-bottom: 20px;
}
.hero h1 { font-size: 48px; font-weight: 700; line-height: 1.2; margin-bottom: 20px; }
.hero p { font-size: 18px; opacity: .85; margin-bottom: 32px; line-height: 1.7; }
.hero-actions { display: flex; gap: 16px; flex-wrap: wrap; }

/* ========== Feature Cards (4 columns) ========== */
.feature-grid {
  display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px;
}
.feature-card {
  padding: 32px 24px; background: #fff; border-radius: var(--radius-lg);
  border: 1px solid var(--border); text-align: center;
  transition: transform var(--transition), box-shadow var(--transition);
}
.feature-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); }
.feature-card .icon {
  width: 120px; height: 120px; margin: 0 auto 20px;
  display: flex; align-items: center; justify-content: center;
  background: transparent; border-radius: 12px; color: var(--primary);
}
.feature-card .icon img {
  width: 100%; height: 100%; object-fit: contain;
}
.feature-card h4 { font-size: 18px; margin-bottom: 8px; }
.feature-card p { font-size: 14px; color: var(--text-light); line-height: 1.6; }

/* ========== Feature Rows (alternating left-right) ========== */
.feature-row {
  display: flex; align-items: center; gap: 60px;
  padding: 60px 0;
}
.feature-row.reverse { flex-direction: row-reverse; }
.feature-row .feature-img {
  flex: 1; min-height: 320px;
  background-size: cover; background-position: center;
  border-radius: var(--radius-lg); overflow: hidden;
}
.feature-row .feature-img img {
  width: 100%; height: 100%; object-fit: cover;
  border-radius: var(--radius-lg);
}
.feature-row .feature-text { flex: 1; }
.feature-row .feature-text h3 {
  font-size: 28px; font-weight: 700; margin-bottom: 16px;
}
.feature-row .feature-text p {
  font-size: 15px; color: var(--text-light); line-height: 1.8; margin-bottom: 20px;
}
.feature-list { display: flex; flex-direction: column; gap: 12px; }
.feature-list li {
  display: flex; align-items: flex-start; gap: 10px;
  font-size: 14px; color: var(--text);
}
.feature-list li::before {
  content: ''; flex-shrink: 0; width: 20px; height: 20px; margin-top: 2px;
  background: var(--primary); border-radius: 50%;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%23fff' stroke-width='3'%3E%3Cpath d='M5 12l5 5L20 7'/%3E%3C/svg%3E");
  background-size: 12px; background-repeat: no-repeat; background-position: center;
}

/* Blue background variant for alternating rows */
.feature-section-blue {
  background: linear-gradient(135deg, var(--primary-9) 0%, var(--primary) 100%);
  color: #fff; padding: 0;
}
.feature-section-blue .feature-text h3 { color: #fff; }
.feature-section-blue .feature-text p { color: rgba(255,255,255,.8); }
.feature-section-blue .feature-list li { color: rgba(255,255,255,.9); }
.feature-section-blue .feature-list li::before {
  background: rgba(255,255,255,.2);
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%23fff' stroke-width='3'%3E%3Cpath d='M5 12l5 5L20 7'/%3E%3C/svg%3E");
  background-size: 12px; background-repeat: no-repeat; background-position: center;
}

/* ========== Stats ========== */
.stats {
  display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px;
  text-align: center; padding: 40px 0;
}
.stat-item { padding: 24px; }
.stat-num {
  font-size: 48px; font-weight: 700; color: var(--primary);
  line-height: 1;
}
.stat-arrow { color: #22c55e; font-size: 20px; margin-left: 4px; }
.stat-unit { font-size: 14px; color: var(--text-light); margin-top: 8px; }
.section-dark .stat-num,
.section-blue .stat-num { color: #fff; }
.section-dark .stat-unit,
.section-blue .stat-unit { color: rgba(255,255,255,.7); }

/* ========== Video Demo ========== */
.video-demo {
  max-width: 900px; margin: 0 auto;
  border-radius: var(--radius-lg); overflow: hidden;
  background: var(--bg-gray); aspect-ratio: 16/9;
  display: flex; align-items: center; justify-content: center;
  border: 1px solid var(--border);
}
.video-demo .play-btn {
  width: 80px; height: 80px; border-radius: 50%;
  background: var(--primary); color: #fff;
  display: flex; align-items: center; justify-content: center;
  box-shadow: 0 4px 20px rgba(26,86,219,.3);
  transition: transform var(--transition);
}
.video-demo .play-btn:hover { transform: scale(1.1); }

/* ========== Service Cards (bottom row) ========== */
.service-grid {
  display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px;
}
.service-card {
  padding: 32px 24px; background: #fff; border-radius: var(--radius-lg);
  border: 1px solid var(--border); text-align: center;
  transition: transform var(--transition), box-shadow var(--transition);
}
.service-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); }
.service-card .icon {
  width: 48px; height: 48px; margin: 0 auto 16px; color: var(--primary);
}
.service-card h4 { font-size: 16px; font-weight: 600; margin-bottom: 8px; }
.service-card p { font-size: 13px; color: var(--text-light); line-height: 1.6; }

/* ========== Case Cards ========== */
.case-grid {
  display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px;
}
.case-card {
  background: #fff; border-radius: var(--radius-lg); overflow: hidden;
  border: 1px solid var(--border);
  transition: transform var(--transition), box-shadow var(--transition);
}
.case-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); }
.case-card .case-img {
  height: 200px; background-size: cover; background-position: center;
  background-color: var(--bg-gray);
}
.case-card .case-body { padding: 20px; }
.case-card .case-tag {
  display: inline-block; padding: 4px 10px; font-size: 12px;
  background: var(--bg-light); color: var(--primary); border-radius: 4px;
  margin-bottom: 8px;
}
.case-card h4 { font-size: 16px; margin-bottom: 8px; }
.case-card p { font-size: 13px; color: var(--text-light); line-height: 1.6; }

/* ========== News List ========== */
.news-list { display: flex; flex-direction: column; gap: 24px; }
.news-item {
  display: flex; gap: 24px; padding: 24px;
  background: #fff; border-radius: var(--radius-lg);
  border: 1px solid var(--border);
  transition: transform var(--transition), box-shadow var(--transition);
}
.news-item:hover { transform: translateY(-2px); box-shadow: var(--shadow-lg); }
.news-item .news-img {
  flex-shrink: 0; width: 240px; height: 160px;
  background-size: cover; background-position: center;
  background-color: var(--bg-gray); border-radius: var(--radius);
}
.news-item .news-body { flex: 1; }
.news-item .news-date { font-size: 13px; color: var(--text-light); margin-bottom: 8px; }
.news-item h4 { font-size: 18px; margin-bottom: 8px; }
.news-item p { font-size: 14px; color: var(--text-light); line-height: 1.6; }

/* ========== Contact Form ========== */
.contact-grid {
  display: grid; grid-template-columns: 1fr 1fr; gap: 48px;
  align-items: start;
}
.contact-form { display: flex; flex-direction: column; gap: 16px; }
.form-group { display: flex; flex-direction: column; gap: 6px; }
.form-group label { font-size: 14px; font-weight: 500; }
.form-group input,
.form-group textarea,
.form-group select {
  padding: 12px 16px; font-size: 14px;
  border: 1px solid var(--border); border-radius: 6px;
  background: #fff; color: var(--text);
  transition: border-color var(--transition);
}
.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
  outline: none; border-color: var(--primary); box-shadow: 0 0 0 3px rgba(26,86,219,.1);
}
.form-group textarea { resize: vertical; min-height: 120px; }

.contact-info { display: flex; flex-direction: column; gap: 24px; }
.contact-info-item { display: flex; gap: 16px; align-items: flex-start; }
.contact-info-item .ci-icon {
  flex-shrink: 0; width: 48px; height: 48px;
  background: var(--bg-light); border-radius: 10px;
  display: flex; align-items: center; justify-content: center;
  color: var(--primary);
}
.contact-info-item h4 { font-size: 15px; margin-bottom: 4px; }
.contact-info-item p { font-size: 14px; color: var(--text-light); }

/* ========== Partner Grid ========== */
.partner-grid {
  display: grid; grid-template-columns: repeat(5, 1fr); gap: 20px;
}
.partner-item {
  height: 80px; display: flex; align-items: center; justify-content: center;
  background: #fff; border-radius: var(--radius); border: 1px solid var(--border);
  font-size: 14px; color: var(--text-light); font-weight: 500;
  transition: border-color var(--transition), box-shadow var(--transition);
}
.partner-item:hover { border-color: var(--primary); box-shadow: var(--shadow); }

/* ========== CTA ========== */
.cta {
  padding: 80px 0; text-align: center;
  background: linear-gradient(rgba(0,0,0,0.5), rgba(0,0,0,0.5)), url('../images/banners/cta-water.jpg') center/cover no-repeat;
  color: #fff;
}
.cta h2 { font-size: 32px; font-weight: 700; margin-bottom: 16px; }
.cta p { font-size: 16px; opacity: .85; margin-bottom: 32px; max-width: 500px; margin-left: auto; margin-right: auto; }

/* ========== Footer ========== */
.footer {
  background: var(--bg-dark); color: rgba(255,255,255,.7);
  padding: 60px 0 0;
}
.footer-grid {
  display: grid; grid-template-columns: 1.5fr 1fr 1fr 1fr; gap: 40px;
  padding-bottom: 40px;
}
.footer-brand .logo { color: #fff; font-size: 18px; margin-bottom: 12px; }
.footer-brand p { font-size: 14px; line-height: 1.7; }
.footer-col h4 {
  font-size: 15px; font-weight: 600; color: #fff; margin-bottom: 16px;
}
.footer-col a {
  display: block; font-size: 14px; color: rgba(255,255,255,.6);
  padding: 4px 0; transition: color var(--transition);
}
.footer-col a:hover { color: #fff; }
.footer-bottom {
  border-top: 1px solid rgba(255,255,255,.1);
  padding: 20px 0; display: flex; justify-content: space-between;
  font-size: 13px; color: rgba(255,255,255,.4);
}

/* ========== Hero Stats Bar ========== */
.hero-stats {
  display: flex; align-items: center; gap: 32px;
  padding: 40px 48px; background: #fff; border-radius: var(--radius-lg);
  box-shadow: 0 12px 40px rgba(0,0,0,.1);
  margin-top: -60px; position: relative; z-index: 10;
}
.hero-stats .hs-highlight {
  display: flex; gap: 24px; flex-shrink: 0;
}
.hero-stats .hs-item {
  display: flex; align-items: center; gap: 12px;
  padding: 12px 16px; background: var(--bg-light); border-radius: var(--radius);
}
.hero-stats .hs-item .hs-icon {
  width: 40px; height: 40px; color: var(--primary);
  display: flex; align-items: center; justify-content: center;
  flex-shrink: 0;
}
.hero-stats .hs-item span { font-size: 13px; color: var(--text-light); white-space: nowrap; }
.hero-stats .hs-nums {
  display: flex; gap: 24px; flex: 1; justify-content: space-around;
}
.hero-stats .hs-num {
  text-align: center;
}
.hero-stats .hs-num strong {
  display: flex; align-items: center; justify-content: center; gap: 6px;
  font-size: 28px; font-weight: 700; color: var(--primary); line-height: 1;
}
.hero-stats .hs-num strong svg { flex-shrink: 0; }
.hero-stats .hs-num small {
  display: block; font-size: 12px; color: var(--text-light); margin-top: 4px;
}

/* ========== Why Choose - Image Section ========== */
.why-image {
  border-radius: var(--radius-lg); overflow: hidden; margin-bottom: 40px;
  max-height: 400px;
}
.why-image img { width: 100%; height: 100%; object-fit: cover; }
.why-points {
  display: grid; grid-template-columns: repeat(2, 1fr); gap: 32px;
}
.why-point {
  display: flex; gap: 16px; align-items: flex-start;
}
.why-point .wp-icon {
  flex-shrink: 0; width: 48px; height: 48px;
  background: var(--bg-light); border-radius: 10px;
  display: flex; align-items: center; justify-content: center;
  color: var(--primary);
}
.why-point h4 { font-size: 16px; margin-bottom: 4px; }
.why-point p { font-size: 13px; color: var(--text-light); line-height: 1.6; }

/* ========== Product Intro Section ========== */
.product-intro-section { padding: 0; }

/* ========== Pain Point Cards ========== */
.pain-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
}
.pain-card {
  padding: 32px;
  background: #fff;
  border-radius: var(--radius-lg);
  border: 1px solid var(--border);
  transition: transform var(--transition), box-shadow var(--transition);
}
.pain-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); }
.pain-num {
  display: inline-flex; align-items: center; justify-content: center;
  width: 40px; height: 40px; border-radius: 50%;
  background: var(--bg-light); color: var(--primary);
  font-size: 16px; font-weight: 700; margin-bottom: 16px;
}
.pain-card h4 { font-size: 18px; font-weight: 600; margin-bottom: 8px; }
.pain-card p { font-size: 14px; color: var(--text-light); line-height: 1.7; }

/* ========== Scenario Cards ========== */
.scenario-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}
.scenario-card {
  padding: 32px 24px;
  background: #fff;
  border-radius: var(--radius-lg);
  border: 1px solid var(--border);
  text-align: center;
  transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
}
.scenario-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
  border-color: var(--primary);
}
.scenario-card h4 { font-size: 15px; font-weight: 600; color: var(--text); }

/* ========== Screenshot Grid ========== */
.screenshot-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}
.screenshot-item {
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--border);
  transition: transform var(--transition), box-shadow var(--transition);
}
.screenshot-item:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); }
.screenshot-item img {
  width: 100%;
  height: auto;
  display: block;
}
.screenshot-item p {
  padding: 12px 16px;
  font-size: 13px;
  color: var(--text-light);
  text-align: center;
  background: transparent;
}

/* ========== Responsive: New Components ========== */
@media (max-width: 1024px) {
  .pain-grid { grid-template-columns: 1fr; }
  .scenario-grid { grid-template-columns: repeat(2, 1fr); }
  .screenshot-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 768px) {
  .scenario-grid { grid-template-columns: 1fr; }
  .screenshot-grid { grid-template-columns: 1fr; }
}

/* ========== Animations ========== */
.fade-in {
  opacity: 0; transform: translateY(24px);
  transition: opacity .6s ease, transform .6s ease;
}
.fade-in.visible { opacity: 1; transform: translateY(0); }

/* ========== Responsive ========== */
@media (max-width: 1024px) {
  .hero-stats { flex-direction: column; gap: 20px; padding: 24px; margin-top: -40px; }
  .hero-stats .hs-highlight { flex-wrap: wrap; }
  .hero-stats .hs-nums { flex-wrap: wrap; gap: 16px; }
  .why-points { grid-template-columns: 1fr; }
  .feature-grid, .stats, .service-grid { grid-template-columns: repeat(2, 1fr); }
  .feature-row { flex-direction: column; gap: 32px; }
  .feature-row.reverse { flex-direction: column; }
  .feature-row .feature-img { min-height: 240px; width: 100%; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .contact-grid { grid-template-columns: 1fr; }
  .case-grid { grid-template-columns: repeat(2, 1fr); }
  .partner-grid { grid-template-columns: repeat(3, 1fr); }
}

@media (max-width: 768px) {
  .header .container { height: 60px; }
  .nav {
    display: none; position: fixed; top: 60px; left: 0; width: 100%;
    background: #fff; flex-direction: column; padding: 16px;
    border-bottom: 1px solid var(--border); box-shadow: var(--shadow-lg);
    gap: 0;
  }
  .nav.active { display: flex; }
  .nav-item { padding: 12px 16px; width: 100%; }
  .dropdown {
    position: static; opacity: 1; visibility: visible; transform: none;
    box-shadow: none; border: none; padding: 0 0 0 16px;
    display: none;
  }
  .nav-item:hover .dropdown,
  .nav-item.open .dropdown { display: block; }
  .menu-toggle { display: flex; }
  .header-right { display: none; }

  .hero-stats { margin-top: -30px; padding: 20px; }
  .hero-stats .hs-num strong { font-size: 22px; }
  .hero { padding: 120px 0 60px; }
  .hero h1 { font-size: 32px; }
  .page-banner { padding: 100px 0 50px; }
  .page-banner h1 { font-size: 28px; }
  .section { padding: 50px 0; }
  .section-title h2 { font-size: 24px; }

  .feature-grid, .service-grid { grid-template-columns: 1fr; }
  .stats { grid-template-columns: repeat(2, 1fr); gap: 16px; }
  .stat-num { font-size: 36px; }

  .news-item { flex-direction: column; }
  .news-item .news-img { width: 100%; height: 180px; }

  .footer-grid { grid-template-columns: 1fr; gap: 24px; }
  .footer-bottom { flex-direction: column; gap: 8px; text-align: center; }
  .case-grid { grid-template-columns: 1fr; }
  .partner-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 480px) {
  .hero h1 { font-size: 26px; }
  .hero-actions { flex-direction: column; }
  .btn-lg { padding: 14px 28px; font-size: 15px; }
  .stats { grid-template-columns: 1fr 1fr; }
}