/* ================================
   91营销宝官网 - 主样式表
   ================================ */

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

:root {
  --primary: #FF6200;
  --primary-dark: #E05500;
  --primary-light: #FF8533;
  --primary-bg: #FFF3EC;
  --secondary: #1A1A2E;
  --text-main: #1A1A2E;
  --text-muted: #666;
  --text-light: #999;
  --border: #EBEBEB;
  --card-bg: #fff;
  --section-bg: #F8F9FC;
  --radius: 12px;
  --radius-sm: 8px;
  --radius-lg: 20px;
  --shadow: 0 4px 20px rgba(0,0,0,.08);
  --shadow-hover: 0 8px 32px rgba(0,0,0,.14);
  --transition: all .25s ease;
}

html { scroll-behavior: smooth; }

body {
  font-family: -apple-system, BlinkMacSystemFont, 'PingFang SC', 'Microsoft YaHei', sans-serif;
  color: var(--text-main);
  background: #fff;
  font-size: 15px;
  line-height: 1.6;
  overflow-x: hidden;
}

a { text-decoration: none; color: inherit; }
img { max-width: 100%; display: block; }
button { cursor: pointer; border: none; background: none; font-family: inherit; }

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

/* ---------- Buttons ---------- */
.btn-primary {
  display: inline-flex; align-items: center; gap: 6px;
  background: var(--primary); color: #fff;
  padding: 10px 22px; border-radius: 50px;
  font-size: 14px; font-weight: 500;
  transition: var(--transition);
}
.btn-primary:hover { background: var(--primary-dark); transform: translateY(-1px); }

.btn-ghost {
  display: inline-flex; align-items: center;
  color: var(--text-main); padding: 10px 20px;
  font-size: 14px; border-radius: 50px;
  border: 1px solid var(--border);
  transition: var(--transition);
}
.btn-ghost:hover { border-color: var(--primary); color: var(--primary); }

.btn-outline {
  display: inline-flex; align-items: center; gap: 8px;
  border: 2px solid var(--primary); color: var(--primary);
  padding: 12px 32px; border-radius: 50px;
  font-size: 15px; font-weight: 500;
  transition: var(--transition);
}
.btn-outline:hover { background: var(--primary); color: #fff; }

/* ---------- Section Headers ---------- */
.section-header { text-align: center; margin-bottom: 50px; }
.section-tag {
  display: inline-block;
  background: var(--primary-bg); color: var(--primary);
  padding: 5px 16px; border-radius: 50px;
  font-size: 13px; font-weight: 500; margin-bottom: 14px;
}
.section-title { font-size: 32px; font-weight: 700; color: var(--text-main); margin-bottom: 12px; }
.section-desc { font-size: 15px; color: var(--text-muted); max-width: 540px; margin: 0 auto; }

/* ================================
   HEADER
   ================================ */
.header {
  position: fixed; top: 0; left: 0; right: 0; z-index: 1000;
  background: rgba(255,255,255,.95);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid transparent;
  transition: var(--transition);
  height: 70px;
}
.header.scrolled { border-bottom-color: var(--border); box-shadow: 0 2px 16px rgba(0,0,0,.07); }
.header .container {
  display: flex; align-items: center; gap: 32px; height: 70px;
}

.logo { display: flex; align-items: center; gap: 8px; }
.logo-icon {
  width: 38px; height: 38px; background: var(--primary); color: #fff;
  border-radius: 10px; display: flex; align-items: center; justify-content: center;
  font-size: 13px; font-weight: 700;
}
.logo-text { font-size: 18px; font-weight: 700; color: var(--text-main); }

.nav { display: flex; gap: 8px; flex: 1; }
.nav a {
  padding: 7px 14px; border-radius: 8px; font-size: 14px;
  color: var(--text-muted); transition: var(--transition);
}
.nav a:hover { color: var(--primary); background: var(--primary-bg); }

.header-btns { display: flex; align-items: center; gap: 10px; }

.menu-toggle {
  display: none; flex-direction: column; gap: 5px;
  padding: 8px;
}
.menu-toggle span {
  display: block; width: 22px; height: 2px;
  background: var(--text-main); border-radius: 2px; transition: var(--transition);
}

/* ================================
   HERO
   ================================ */
.hero {
  background: linear-gradient(135deg, #1A1A2E 0%, #16213E 50%, #0F3460 100%);
  padding-top: 70px; min-height: 100vh;
  display: flex; flex-direction: column; justify-content: center;
  position: relative; overflow: hidden;
}
.hero::before {
  content: ''; position: absolute; top: -100px; right: -100px;
  width: 600px; height: 600px;
  background: radial-gradient(circle, rgba(255,98,0,.15) 0%, transparent 70%);
  border-radius: 50%; pointer-events: none;
}
.hero::after {
  content: ''; position: absolute; bottom: 80px; left: -50px;
  width: 400px; height: 400px;
  background: radial-gradient(circle, rgba(255,98,0,.08) 0%, transparent 70%);
  border-radius: 50%; pointer-events: none;
}
.hero .container {
  display: grid; grid-template-columns: 1fr 1fr;
  align-items: center; gap: 60px;
  padding-top: 60px; padding-bottom: 80px;
  position: relative; z-index: 1;
}
.hero-badge {
  display: inline-flex; align-items: center; gap: 6px;
  background: rgba(255,98,0,.2); color: #FF8533;
  padding: 6px 16px; border-radius: 50px;
  font-size: 13px; margin-bottom: 20px;
  border: 1px solid rgba(255,98,0,.3);
}
.hero-title {
  font-size: 52px; font-weight: 800; line-height: 1.15;
  color: #fff; margin-bottom: 20px;
}
.hero-title .highlight { color: var(--primary); }
.hero-desc { font-size: 16px; color: rgba(255,255,255,.65); line-height: 1.8; margin-bottom: 36px; }
.hero-actions { display: flex; gap: 14px; margin-bottom: 50px; }
.btn-hero-primary {
  display: inline-flex; align-items: center; gap: 8px;
  background: var(--primary); color: #fff;
  padding: 14px 32px; border-radius: 50px; font-size: 15px; font-weight: 600;
  transition: var(--transition);
}
.btn-hero-primary:hover { background: var(--primary-dark); transform: translateY(-2px); box-shadow: 0 8px 24px rgba(255,98,0,.4); }
.btn-hero-ghost {
  display: inline-flex; align-items: center; gap: 8px;
  border: 1px solid rgba(255,255,255,.3); color: rgba(255,255,255,.85);
  padding: 14px 32px; border-radius: 50px; font-size: 15px; font-weight: 500;
  transition: var(--transition);
}
.btn-hero-ghost:hover { border-color: rgba(255,255,255,.6); color: #fff; }

.hero-stats { display: flex; align-items: center; gap: 24px; }
.stat-item { text-align: center; }
.stat-num { display: block; font-size: 28px; font-weight: 800; color: var(--primary); }
.stat-label { font-size: 12px; color: rgba(255,255,255,.5); margin-top: 2px; }
.stat-divider { width: 1px; height: 32px; background: rgba(255,255,255,.15); }

/* Phone Mockup */
.hero-visual { position: relative; display: flex; justify-content: center; }
.phone-mockup {
  width: 260px; height: 520px;
  background: #0d0d1a;
  border-radius: 36px;
  border: 3px solid rgba(255,255,255,.12);
  padding: 16px;
  box-shadow: 0 30px 80px rgba(0,0,0,.4), 0 0 0 1px rgba(255,255,255,.05);
  position: relative;
}
.phone-screen {
  width: 100%; height: 100%;
  background: #fff; border-radius: 24px; overflow: hidden;
}
.mock-activity { padding: 12px; height: 100%; display: flex; flex-direction: column; gap: 8px; }
.mock-header { display: flex; justify-content: space-between; align-items: center; }
.mock-logo-sm { font-size: 12px; font-weight: 700; color: var(--primary); }
.mock-tag { background: var(--primary); color: #fff; font-size: 10px; padding: 2px 8px; border-radius: 10px; }
.mock-banner {
  background: linear-gradient(135deg, var(--primary) 0%, #FF8533 100%);
  border-radius: 10px; padding: 14px; flex: 1;
  display: flex; align-items: flex-end;
}
.mock-title { font-size: 16px; font-weight: 700; color: #fff; line-height: 1.3; }
.mock-sub { font-size: 11px; color: rgba(255,255,255,.85); margin-top: 4px; }
.mock-product { padding: 4px 0; }
.mock-product-card { display: flex; gap: 10px; align-items: center; }
.mock-product-img { width: 44px; height: 44px; background: #f0f0f0; border-radius: 8px; flex-shrink: 0; }
.mock-pname { font-size: 11px; font-weight: 500; }
.mock-pprice { font-size: 16px; font-weight: 700; color: var(--primary); }
.mock-pprice span { font-size: 11px; }
.mock-ori { font-size: 11px; color: #999; text-decoration: line-through; margin-left: 4px; font-weight: 400; }
.mock-btn {
  width: 100%; padding: 10px;
  background: var(--primary); color: #fff;
  border-radius: 20px; font-size: 13px; font-weight: 600; cursor: default;
}
.mock-share { display: flex; align-items: center; gap: 6px; padding: 4px 0; }
.mock-avatar {
  width: 22px; height: 22px; border-radius: 50%;
  background: linear-gradient(135deg, #667eea, #764ba2);
  border: 2px solid #fff;
}
.mock-share-text { font-size: 10px; color: #999; }

.float-card {
  position: absolute; background: #fff;
  border-radius: 12px; padding: 12px 16px;
  box-shadow: 0 8px 32px rgba(0,0,0,.15);
  display: flex; align-items: center; gap: 10px;
  animation: float 3s ease-in-out infinite;
}
.float-card i { font-size: 20px; color: var(--primary); }
.fc-num { font-size: 16px; font-weight: 700; color: var(--text-main); margin: 0; }
.fc-label { font-size: 11px; color: var(--text-muted); margin: 0; }
.fc1 { left: -30px; top: 100px; animation-delay: 0s; }
.fc2 { right: -20px; bottom: 120px; animation-delay: 1.5s; }

@keyframes float {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-8px); }
}

.hero-wave {
  position: absolute; bottom: 0; left: 0; right: 0; height: 80px;
}
.hero-wave svg { width: 100%; height: 100%; }

/* ================================
   FEATURES
   ================================ */
.features { padding: 100px 0; background: #fff; }

.feature-tabs {
  display: flex; gap: 12px; justify-content: center;
  margin-bottom: 40px;
}
.ftab {
  padding: 9px 28px; border-radius: 50px; font-size: 14px; font-weight: 500;
  border: 1px solid var(--border); color: var(--text-muted);
  transition: var(--transition);
}
.ftab.active { background: var(--primary); color: #fff; border-color: var(--primary); }
.ftab:hover:not(.active) { border-color: var(--primary); color: var(--primary); }

.feature-grid {
  display: grid; grid-template-columns: repeat(auto-fill, minmax(250px, 1fr)); gap: 20px;
}
.feature-card[data-cat="game"] { display: none; }
.feature-card.show { display: block; }

.feature-card {
  background: var(--card-bg); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 24px;
  transition: var(--transition); position: relative;
  cursor: default;
}
.feature-card:hover { box-shadow: var(--shadow-hover); transform: translateY(-4px); border-color: var(--primary-light); }
.feature-card.featured { border-color: var(--primary); }

.fcard-badge {
  position: absolute; top: 16px; right: 16px;
  background: var(--primary); color: #fff;
  font-size: 11px; padding: 3px 10px; border-radius: 50px;
}
.fcard-icon {
  width: 48px; height: 48px; border-radius: 12px;
  display: flex; align-items: center; justify-content: center;
  font-size: 20px; margin-bottom: 14px;
}
.feature-card h3 { font-size: 16px; font-weight: 600; margin-bottom: 8px; }
.feature-card p { font-size: 13px; color: var(--text-muted); line-height: 1.6; margin-bottom: 14px; }
.fcard-tags { display: flex; flex-wrap: wrap; gap: 6px; }
.fcard-tags span {
  font-size: 11px; color: var(--primary);
  background: var(--primary-bg); padding: 3px 10px; border-radius: 20px;
}

/* ================================
   ADVANTAGES
   ================================ */
.advantages { padding: 100px 0; background: var(--section-bg); }
.adv-grid {
  display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px;
}
.adv-card {
  background: #fff; border-radius: var(--radius); padding: 28px 22px;
  border: 1px solid var(--border); transition: var(--transition);
}
.adv-card:hover { box-shadow: var(--shadow); transform: translateY(-3px); }
.adv-icon {
  width: 50px; height: 50px; background: var(--primary-bg); border-radius: 12px;
  display: flex; align-items: center; justify-content: center;
  color: var(--primary); font-size: 22px; margin-bottom: 14px;
}
.adv-card h3 { font-size: 15px; font-weight: 600; margin-bottom: 8px; }
.adv-card p { font-size: 13px; color: var(--text-muted); line-height: 1.65; }

/* ================================
   INDUSTRIES
   ================================ */
.industries { padding: 100px 0; background: #fff; }

.industry-tabs {
  display: flex; gap: 10px; justify-content: center;
  flex-wrap: wrap; margin-bottom: 48px;
}
.itab {
  padding: 10px 24px; border-radius: 50px; font-size: 14px; font-weight: 500;
  border: 1px solid var(--border); color: var(--text-muted);
  transition: var(--transition);
}
.itab.active { background: var(--primary); color: #fff; border-color: var(--primary); }
.itab:hover:not(.active) { border-color: var(--primary); color: var(--primary); }

.industry-content { position: relative; min-height: 400px; }
.ind-panel { display: none; }
.ind-panel.active { display: grid; grid-template-columns: 1fr 1fr; gap: 60px; align-items: center; }

.ind-icon {
  width: 60px; height: 60px; background: var(--primary-bg); border-radius: 16px;
  display: flex; align-items: center; justify-content: center;
  color: var(--primary); font-size: 26px; margin-bottom: 18px;
}
.ind-left h3 { font-size: 26px; font-weight: 700; margin-bottom: 12px; }
.ind-desc { font-size: 15px; color: var(--text-muted); line-height: 1.7; margin-bottom: 24px; }
.ind-features { display: flex; flex-wrap: wrap; gap: 10px; margin-bottom: 32px; }
.ind-feat {
  display: flex; align-items: center; gap: 6px;
  font-size: 13px; color: var(--text-main); font-weight: 500;
}
.ind-feat i { color: var(--primary); font-size: 13px; }
.btn-ind {
  display: inline-flex; align-items: center; gap: 8px;
  background: var(--primary); color: #fff;
  padding: 12px 28px; border-radius: 50px; font-size: 14px; font-weight: 500;
  transition: var(--transition);
}
.btn-ind:hover { background: var(--primary-dark); transform: translateY(-2px); }

.ind-right { display: flex; justify-content: center; align-items: center; }
.ind-mock-card {
  width: 300px; border-radius: var(--radius-lg); overflow: hidden;
  box-shadow: var(--shadow-hover);
}
.imc-header { padding: 24px 22px; }
.imc-title { font-size: 18px; font-weight: 700; color: #fff; }
.imc-sub { font-size: 13px; color: rgba(255,255,255,.8); margin-top: 4px; }
.imc-body { background: #fff; padding: 20px 22px; }
.imc-row {
  display: flex; justify-content: space-between; align-items: center;
  padding: 10px 0; border-bottom: 1px solid var(--border);
  font-size: 14px;
}
.imc-row:last-child { border-bottom: none; }
.imc-row span { color: var(--text-muted); }
.imc-row strong { font-weight: 600; }

/* ================================
   NUMBERS
   ================================ */
.numbers-section {
  padding: 80px 0;
  background: linear-gradient(135deg, #1A1A2E, #0F3460);
}
.numbers-grid {
  display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px;
}
.num-card {
  text-align: center; padding: 32px 20px;
}
.num-icon {
  width: 56px; height: 56px; background: rgba(255,98,0,.2); border-radius: 14px;
  display: flex; align-items: center; justify-content: center;
  color: var(--primary); font-size: 24px; margin: 0 auto 16px;
}
.num-val {
  font-size: 48px; font-weight: 800; color: #fff; line-height: 1;
  margin-bottom: 8px;
}
.num-val span { font-size: 28px; color: var(--primary); }
.num-label { font-size: 13px; color: rgba(255,255,255,.55); }

/* ================================
   TEMPLATES
   ================================ */
.templates { padding: 100px 0; background: var(--section-bg); }
.template-grid {
  display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px;
  margin-bottom: 40px;
}
.tmpl-card {
  border-radius: var(--radius); overflow: hidden;
  border: 1px solid var(--border); background: #fff;
  transition: var(--transition);
}
.tmpl-card:hover { box-shadow: var(--shadow-hover); transform: translateY(-4px); }
.tmpl-preview {
  height: 160px; position: relative; display: flex; align-items: flex-end; padding: 16px;
}
.tp1 { background: linear-gradient(135deg, #FF6200, #FF8533); }
.tp2 { background: linear-gradient(135deg, #E91E63, #FF5722); }
.tp3 { background: linear-gradient(135deg, #9C27B0, #3F51B5); }
.tp4 { background: linear-gradient(135deg, #F57F17, #E65100); }
.tp5 { background: linear-gradient(135deg, #1565C0, #0097A7); }
.tp6 { background: linear-gradient(135deg, #2E7D32, #1B5E20); }
.tp-tag {
  position: absolute; top: 12px; right: 12px;
  background: rgba(255,255,255,.25); color: #fff;
  font-size: 11px; padding: 3px 10px; border-radius: 10px;
  backdrop-filter: blur(4px);
}
.tp-title { font-size: 18px; font-weight: 700; color: #fff; line-height: 1.35; }
.tmpl-info {
  display: flex; justify-content: space-between; align-items: center;
  padding: 12px 16px;
}
.tmpl-cat { font-size: 13px; color: var(--text-muted); }
.tmpl-use { font-size: 12px; color: var(--primary); }
.tmpl-use i { margin-right: 3px; }
.tmpl-more { text-align: center; }

/* ================================
   WHY US
   ================================ */
.why-us { padding: 100px 0; background: #fff; }
.why-grid {
  display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px;
}
.why-card {
  background: var(--section-bg); border-radius: var(--radius);
  padding: 32px 24px; position: relative; transition: var(--transition);
}
.why-card:hover { background: var(--primary-bg); }
.why-num {
  font-size: 40px; font-weight: 800; color: var(--border);
  line-height: 1; margin-bottom: 14px;
}
.why-card:hover .why-num { color: rgba(255,98,0,.15); }
.why-icon {
  width: 48px; height: 48px; background: var(--primary-bg); border-radius: 12px;
  display: flex; align-items: center; justify-content: center;
  color: var(--primary); font-size: 20px; margin-bottom: 14px;
}
.why-card h3 { font-size: 16px; font-weight: 600; margin-bottom: 8px; }
.why-card p { font-size: 13px; color: var(--text-muted); line-height: 1.65; }

/* ================================
   NEWS
   ================================ */
.news { padding: 100px 0; background: var(--section-bg); }
.news-grid {
  display: grid; grid-template-columns: 1.6fr 1fr 1fr; gap: 20px;
}
.news-card {
  background: #fff; border-radius: var(--radius); overflow: hidden;
  border: 1px solid var(--border); transition: var(--transition);
}
.news-card:hover { box-shadow: var(--shadow-hover); transform: translateY(-3px); }
.news-img { height: 180px; background: #e0e0e0; }
.main-news .news-img { height: 220px; }
.ni1 { background: linear-gradient(135deg, #1565C0, #42A5F5); }
.ni2 { background: linear-gradient(135deg, #2E7D32, #66BB6A); }
.ni3 { background: linear-gradient(135deg, #E65100, #FFA726); }
.news-content { padding: 20px; }
.news-meta { display: flex; align-items: center; gap: 12px; margin-bottom: 10px; }
.news-cat {
  background: var(--primary-bg); color: var(--primary);
  font-size: 11px; padding: 3px 10px; border-radius: 10px;
}
.news-date { font-size: 12px; color: var(--text-light); }
.news-card h3 { font-size: 15px; font-weight: 600; margin-bottom: 8px; line-height: 1.5; }
.main-news h3 { font-size: 17px; }
.news-card p { font-size: 13px; color: var(--text-muted); line-height: 1.6; margin-bottom: 14px; }
.news-link {
  display: inline-flex; align-items: center; gap: 5px;
  font-size: 13px; color: var(--primary); font-weight: 500;
}
.news-link:hover i { transform: translateX(3px); }
.news-link i { transition: var(--transition); }

/* ================================
   CTA
   ================================ */
.cta-section { padding: 80px 0; background: var(--section-bg); }
.cta-box {
  background: linear-gradient(135deg, #1A1A2E, #0F3460);
  border-radius: var(--radius-lg); padding: 56px 60px;
  display: grid; grid-template-columns: 1fr 1fr; gap: 60px; align-items: center;
}
.cta-left h2 { font-size: 28px; font-weight: 700; color: #fff; margin-bottom: 12px; }
.cta-left p { font-size: 15px; color: rgba(255,255,255,.65); margin-bottom: 24px; line-height: 1.7; }
.cta-tags { display: flex; gap: 20px; flex-wrap: wrap; }
.cta-tags span {
  display: flex; align-items: center; gap: 6px;
  color: rgba(255,255,255,.75); font-size: 14px;
}
.cta-tags i { color: var(--primary); }

.cta-form { display: flex; flex-direction: column; gap: 14px; }
.cta-form input,
.cta-form select {
  padding: 13px 18px;
  border: 1px solid rgba(255,255,255,.15);
  background: rgba(255,255,255,.08);
  border-radius: var(--radius-sm); font-size: 14px; color: #fff;
  outline: none; transition: var(--transition);
  font-family: inherit;
}
.cta-form input::placeholder { color: rgba(255,255,255,.4); }
.cta-form select { color: rgba(255,255,255,.7); }
.cta-form select option { color: #333; background: #fff; }
.cta-form input:focus,
.cta-form select:focus { border-color: var(--primary); background: rgba(255,98,0,.1); }

.btn-cta-submit {
  background: var(--primary); color: #fff;
  padding: 14px; border-radius: var(--radius-sm);
  font-size: 15px; font-weight: 600;
  display: flex; align-items: center; justify-content: center; gap: 8px;
  transition: var(--transition);
}
.btn-cta-submit:hover { background: var(--primary-dark); transform: translateY(-2px); }

/* ================================
   FOOTER
   ================================ */
.footer {
  background: #0d0d1a; padding: 60px 0 0;
}
.footer-grid {
  display: grid; grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 40px; padding-bottom: 48px;
}
.footer-brand .logo-icon { background: var(--primary); }
.footer-slogan { font-size: 14px; color: rgba(255,255,255,.45); margin-top: 12px; margin-bottom: 20px; }
.footer-social { display: flex; gap: 12px; }
.footer-social a {
  width: 36px; height: 36px; border-radius: 8px;
  background: rgba(255,255,255,.08); color: rgba(255,255,255,.5);
  display: flex; align-items: center; justify-content: center; font-size: 16px;
  transition: var(--transition);
}
.footer-social a:hover { background: var(--primary); color: #fff; }

.footer-col h4 { font-size: 14px; font-weight: 600; color: rgba(255,255,255,.85); margin-bottom: 16px; }
.footer-col a {
  display: block; font-size: 13px; color: rgba(255,255,255,.4);
  margin-bottom: 10px; transition: var(--transition);
}
.footer-col a:hover { color: rgba(255,255,255,.85); }

.footer-bottom {
  border-top: 1px solid rgba(255,255,255,.08);
  padding: 20px 0;
  display: flex; justify-content: space-between; align-items: center;
  flex-wrap: wrap; gap: 10px;
}
.footer-bottom p { font-size: 13px; color: rgba(255,255,255,.3); }
.footer-bottom a { color: rgba(255,255,255,.3); transition: var(--transition); }
.footer-bottom a:hover { color: rgba(255,255,255,.6); }

/* ================================
   PAGE LOADER
   ================================ */
.page-loader {
  position: fixed; top: 0; left: 0; right: 0; z-index: 9999;
  height: 3px; background: transparent;
  transition: opacity .3s ease;
}
.loader-bar {
  height: 100%; width: 0;
  background: linear-gradient(90deg, var(--primary), var(--primary-light), #fff);
  transition: width .1s ease;
  border-radius: 0 2px 2px 0;
  box-shadow: 0 0 8px rgba(255,98,0,.6);
}

/* ================================
   MOBILE MENU
   ================================ */
.mobile-overlay {
  display: none; position: fixed; inset: 0;
  background: rgba(0,0,0,.5); z-index: 1500;
  opacity: 0; transition: opacity .3s ease;
}
.mobile-overlay.show { display: block; opacity: 1; }

.mobile-menu {
  position: fixed; top: 0; right: 0; bottom: 0; z-index: 1600;
  width: 80%; max-width: 320px;
  background: #fff; box-shadow: -8px 0 32px rgba(0,0,0,.12);
  display: flex; flex-direction: column;
  transform: translateX(100%); transition: transform .3s ease;
  padding: 0;
}
.mobile-menu.open { transform: translateX(0); }

.mm-header {
  display: flex; align-items: center; justify-content: space-between;
  padding: 18px 20px; border-bottom: 1px solid var(--border);
}
.mm-close {
  width: 36px; height: 36px; border-radius: 8px;
  display: flex; align-items: center; justify-content: center;
  color: var(--text-muted); font-size: 18px; background: var(--section-bg);
  transition: var(--transition);
}
.mm-close:hover { background: var(--primary-bg); color: var(--primary); }

.mm-nav { flex: 1; padding: 16px 0; overflow-y: auto; }
.mm-nav a {
  display: block; padding: 14px 24px; font-size: 15px;
  color: var(--text-main); border-left: 3px solid transparent;
  transition: var(--transition);
}
.mm-nav a:hover, .mm-nav a.active {
  color: var(--primary); background: var(--primary-bg);
  border-left-color: var(--primary);
}
.mm-btns { padding: 16px 20px; border-top: 1px solid var(--border); }

/* ================================
   NEWS IMAGE OVERLAY
   ================================ */
.news-img { position: relative; overflow: hidden; }
.ni-overlay {
  position: absolute; inset: 0;
  display: flex; align-items: center; justify-content: center;
  background: rgba(0,0,0,.2);
  opacity: 0; transition: var(--transition);
}
.ni-overlay i { font-size: 40px; color: #fff; }
.news-card:hover .ni-overlay { opacity: 1; }

/* ================================
   ABOUT SECTION
   ================================ */
.about-section {
  padding: 100px 0; background: var(--section-bg);
}
.about-grid {
  display: grid; grid-template-columns: 1fr 1fr;
  gap: 72px; align-items: start;
}
.about-desc {
  font-size: 15px; color: var(--text-muted); line-height: 1.85;
  margin-bottom: 36px;
}
.about-items { display: flex; flex-direction: column; gap: 20px; }
.about-item {
  display: flex; align-items: flex-start; gap: 16px;
  padding: 18px 20px; background: #fff; border-radius: var(--radius);
  border: 1px solid var(--border); transition: var(--transition);
}
.about-item:hover { box-shadow: var(--shadow); border-color: var(--primary-light); }
.ai-icon {
  width: 44px; height: 44px; border-radius: 12px;
  background: var(--primary-bg); color: var(--primary);
  display: flex; align-items: center; justify-content: center;
  font-size: 18px; flex-shrink: 0;
}
.about-item h4 { font-size: 14px; font-weight: 600; margin-bottom: 4px; }
.about-item p { font-size: 13px; color: var(--text-muted); margin: 0; }

/* 时间线 */
.about-milestones { display: flex; flex-direction: column; gap: 0; }
.milestone {
  display: grid; grid-template-columns: 60px 24px 1fr;
  gap: 0 16px; align-items: start;
  padding-bottom: 32px;
}
.milestone:last-child { padding-bottom: 0; }
.ms-year {
  font-size: 14px; font-weight: 700; color: var(--primary);
  padding-top: 2px; text-align: right;
}
.ms-line {
  display: flex; flex-direction: column; align-items: center;
  padding-top: 6px; position: relative;
}
.ms-line::before {
  content: ''; width: 10px; height: 10px;
  border-radius: 50%; background: var(--primary);
  flex-shrink: 0;
}
.ms-line::after {
  content: ''; flex: 1; width: 2px;
  background: linear-gradient(to bottom, var(--primary), var(--border));
  margin-top: 4px; min-height: 40px;
}
.milestone:last-child .ms-line::after { display: none; }
.ms-content h4 { font-size: 15px; font-weight: 600; margin-bottom: 4px; }
.ms-content p { font-size: 13px; color: var(--text-muted); line-height: 1.6; }

/* ================================
   FLOAT SERVICE
   ================================ */
.float-service {
  position: fixed; right: 24px; bottom: 40px;
  display: flex; flex-direction: column; gap: 10px; z-index: 999;
}
.fs-btn {
  width: 52px; height: 52px; border-radius: 50%;
  background: var(--primary); color: #fff;
  display: flex; flex-direction: column; align-items: center; justify-content: center;
  gap: 2px; box-shadow: 0 4px 16px rgba(255,98,0,.35);
  transition: var(--transition);
}
.fs-btn i { font-size: 18px; }
.fs-btn span { font-size: 9px; line-height: 1; }
.fs-btn:hover { background: var(--primary-dark); transform: scale(1.08); }
.fs-top { background: rgba(30,30,50,.7); box-shadow: 0 4px 16px rgba(0,0,0,.2); }
.fs-top:hover { background: var(--secondary); }
.fs-top i { font-size: 16px; }

/* ================================
   QRCODE MODAL
   ================================ */
.qrcode-overlay {
  position: fixed; inset: 0; background: rgba(0,0,0,.55);
  display: flex; align-items: center; justify-content: center;
  z-index: 9999; opacity: 0; visibility: hidden;
  transition: opacity .3s, visibility .3s;
}
.qrcode-overlay.show { opacity: 1; visibility: visible; }
.qrcode-modal {
  background: #fff; border-radius: 16px; padding: 40px 36px 30px;
  max-width: 380px; width: 90%; text-align: center;
  position: relative; box-shadow: 0 20px 60px rgba(0,0,0,.25);
  transform: translateY(20px); transition: transform .3s;
}
.qrcode-overlay.show .qrcode-modal { transform: translateY(0); }
.qrcode-close {
  position: absolute; top: 12px; right: 16px;
  background: none; border: none; font-size: 28px;
  color: #999; cursor: pointer; line-height: 1;
  transition: color .2s;
}
.qrcode-close:hover { color: #333; }
.qrcode-body h3 {
  font-size: 20px; color: #1a1a2e; margin-bottom: 8px;
}
.qrcode-body > p {
  font-size: 14px; color: #888; margin-bottom: 24px;
}
.qrcode-img-box {
  width: 200px; height: 200px; margin: 0 auto 20px;
  border: 2px solid #eee; border-radius: 12px;
  overflow: hidden; display: flex; align-items: center; justify-content: center;
}
.qrcode-img-box img { width: 100%; height: 100%; object-fit: contain; }
.qrcode-placeholder {
  width: 200px; height: 200px; margin: 0 auto 20px;
  border: 2px dashed #ddd; border-radius: 12px;
  display: flex; flex-direction: column; align-items: center; justify-content: center;
  color: #ccc;
}
.qrcode-placeholder i { font-size: 48px; margin-bottom: 8px; }
.qrcode-placeholder p { font-size: 13px; color: #bbb; }
.qrcode-tips {
  display: flex; justify-content: center; gap: 16px; flex-wrap: wrap;
}
.qrcode-tips span {
  font-size: 12px; color: #666;
}
.qrcode-tips i { color: #2E7D32; margin-right: 4px; }
#backTop { display: none; }

/* ================================
   RESPONSIVE
   ================================ */
@media (max-width: 1024px) {
  .hero .container { grid-template-columns: 1fr; text-align: center; }
  .hero-content { max-width: 600px; margin: 0 auto; }
  .hero-actions, .hero-stats { justify-content: center; }
  .hero-visual { display: none; }
  .hero-title { font-size: 40px; }
  .adv-grid { grid-template-columns: repeat(2, 1fr); }
  .numbers-grid { grid-template-columns: repeat(2, 1fr); }
  .why-grid { grid-template-columns: repeat(2, 1fr); }
  .news-grid { grid-template-columns: 1fr; }
  .template-grid { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .about-grid { grid-template-columns: 1fr; gap: 40px; }
}

@media (max-width: 768px) {
  .nav, .header-btns { display: none; }
  .menu-toggle { display: flex; }
  .section-title { font-size: 24px; }
  .hero-title { font-size: 32px; }
  .hero-stats { flex-wrap: wrap; gap: 16px; }
  .feature-grid { grid-template-columns: 1fr 1fr; }
  .adv-grid { grid-template-columns: 1fr 1fr; }
  .numbers-grid { grid-template-columns: repeat(2, 1fr); }
  .ind-panel.active { grid-template-columns: 1fr; }
  .ind-right { display: none; }
  .why-grid { grid-template-columns: 1fr 1fr; }
  .template-grid { grid-template-columns: 1fr 1fr; }
  .cta-box { grid-template-columns: 1fr; padding: 40px 28px; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .about-grid { grid-template-columns: 1fr; }
}

@media (max-width: 480px) {
  .feature-grid { grid-template-columns: 1fr; }
  .template-grid { grid-template-columns: 1fr; }
  .why-grid { grid-template-columns: 1fr; }
  .numbers-grid { grid-template-columns: 1fr 1fr; }
  .hero-actions { flex-direction: column; }
  .btn-hero-primary, .btn-hero-ghost { justify-content: center; }
  .footer-grid { grid-template-columns: 1fr; }
  .milestone { grid-template-columns: 48px 20px 1fr; }
}