/* 东莞入户网 - 样式表 */
:root {
  --c-danfeng: #C83C23;
  --c-danfeng-dark: #A32D18;
  --c-danfeng-light: #FEF2F0;
  --c-blue: #0EA5E9;
  --c-cyan: #06B6D4;
  --c-orange: #F59E0B;
  --c-orange-deep: #F97316;
  --c-green: #10B981;
  --c-lime: #84CC16;
  --c-purple: #8B5CF6;
  --c-pink: #EC4899;
  --c-indigo: #2563EB;
  --c-text: #1F2937;
  --c-text-muted: #6B7280;
  --c-bg: #F9FAFB;
  --c-white: #FFFFFF;
  --radius-sm: 12px;
  --radius-md: 18px;
  --radius-lg: 28px;
  --shadow-sm: 0 4px 14px rgba(0,0,0,.06);
  --shadow-md: 0 10px 30px rgba(0,0,0,.08);
  --shadow-lg: 0 18px 45px rgba(0,0,0,.12);
  --transition: .25s ease;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: "PingFang SC","Microsoft YaHei","Hiragino Sans GB","Helvetica Neue",Arial,sans-serif;
  color: var(--c-text);
  line-height: 1.7;
  background: var(--c-white);
  -webkit-font-smoothing: antialiased;
}
h1,h2,h3,h4,h5,h6,p { margin: 0; }
ul,ol { margin: 0; padding: 0; list-style: none; }
a { color: inherit; text-decoration: none; }
img { max-width: 100%; height: auto; display: block; }
button { font-family: inherit; cursor: pointer; border: none; background: none; }

.skip-link {
  position: absolute; left: -999px; top: auto; width: 1px; height: 1px; overflow: hidden;
}
.skip-link:focus {
  position: fixed; left: 16px; top: 16px; width: auto; height: auto; z-index: 10000;
  background: var(--c-danfeng); color: #fff; padding: 10px 16px; border-radius: var(--radius-sm);
}

.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
}

/* 按钮 */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  padding: 12px 24px; border-radius: 50px; font-size: 15px; font-weight: 600;
  transition: transform var(--transition), box-shadow var(--transition), opacity var(--transition);
}
.btn:hover { transform: translateY(-2px); }
.btn-primary {
  background: linear-gradient(135deg, var(--c-danfeng), var(--c-orange-deep));
  color: #fff; box-shadow: 0 8px 20px rgba(200,60,35,.32);
}
.btn-secondary {
  background: rgba(255,255,255,.92); color: var(--c-danfeng);
  border: 2px solid rgba(255,255,255,.6);
}
.btn-secondary:hover { background: #fff; }
.btn-nav {
  background: linear-gradient(135deg, var(--c-danfeng), var(--c-orange-deep));
  color: #fff; padding: 9px 18px; font-size: 14px;
}
.btn-nav-ghost {
  color: var(--c-danfeng); border: 1.5px solid var(--c-danfeng);
  padding: 9px 18px; font-size: 14px; font-weight: 600; border-radius: 50px;
}
.btn-nav-ghost:hover { background: var(--c-danfeng-light); }

/* 导航栏 */
.navbar {
  position: fixed; top: 0; left: 0; right: 0; z-index: 1000;
  background: #FFFFFF; height: 84px;
  transition: box-shadow var(--transition);
}
.navbar.scrolled { box-shadow: 0 2px 0 rgba(0,0,0,.05), 0 8px 24px rgba(0,0,0,.04); }
.nav-container {
  height: 100%; display: flex; align-items: center; justify-content: space-between;
}
.logo img { height: 60px; width: auto; }
.nav-menu { display: flex; gap: 28px; }
.nav-menu a {
  font-size: 15px; font-weight: 500; color: var(--c-text);
  position: relative; padding: 6px 0;
}
.nav-menu a::after {
  content: ''; position: absolute; left: 0; bottom: 0; width: 0; height: 2px;
  background: var(--c-danfeng); border-radius: 2px; transition: width var(--transition);
}
.nav-menu a:hover, .nav-menu a.active { color: var(--c-danfeng); }
.nav-menu a:hover::after, .nav-menu a.active::after { width: 100%; }
.nav-cta { display: flex; gap: 12px; align-items: center; }
.menu-toggle { display: none; align-items: center; gap: 6px; color: var(--c-text); font-size: 14px; font-weight: 600; }

/* 抽屉菜单 */
.drawer-overlay {
  position: fixed; inset: 0; background: rgba(0,0,0,.45);
  opacity: 0; pointer-events: none; transition: opacity var(--transition); z-index: 1001;
}
.drawer-overlay.active { opacity: 1; pointer-events: auto; }
.drawer {
  position: fixed; top: 0; right: 0; bottom: 0; width: min(340px, 85vw);
  background: #fff; z-index: 1002;
  transform: translateX(100%); transition: transform .3s cubic-bezier(.25,.8,.25,1);
  display: flex; flex-direction: column;
}
.drawer.active { transform: translateX(0); }
.drawer-header {
  display: flex; align-items: center; justify-content: space-between;
  padding: 18px 20px; border-bottom: 1px solid #F3F4F6;
}
.drawer-header img { height: 45px; width: auto; }
.drawer-close { width: 40px; height: 40px; border-radius: 50%; display: flex; align-items: center; justify-content: center; background: #F3F4F6; }
.drawer-menu { flex: 1; overflow-y: auto; padding: 16px; }
.drawer-menu li { margin-bottom: 8px; }
.drawer-menu a {
  display: flex; align-items: center; gap: 14px; padding: 14px 12px;
  border-radius: var(--radius-md); font-size: 16px; font-weight: 500;
  color: var(--c-text); transition: background var(--transition);
}
.drawer-menu a:hover { background: #F9FAFB; }
.drawer-icon {
  width: 34px; height: 34px; border-radius: 10px; display: flex; align-items: center; justify-content: center;
  color: #fff; flex-shrink: 0;
}
.drawer-footer { padding: 16px; border-top: 1px solid #F3F4F6; display: flex; flex-direction: column; gap: 10px; }
.btn-drawer-tel { background: var(--c-danfeng); color: #fff; border-radius: 50px; padding: 12px; font-weight: 600; }
.btn-drawer-wechat { background: var(--c-green); color: #fff; border-radius: 50px; padding: 12px; font-weight: 600; }

/* Hero */
.hero {
  position: relative; min-height: 100vh; display: flex; align-items: center;
  padding: 140px 0 120px; overflow: hidden;
}
.hero-media { position: absolute; inset: 0; z-index: 0; }
.hero-media img { width: 100%; height: 100%; object-fit: cover; animation: heroZoom 22s infinite alternate ease-in-out; }
@keyframes heroZoom {
  from { transform: scale(1); }
  to { transform: scale(1.12); }
}
.hero-gradient {
  position: absolute; inset: 0;
  background: linear-gradient(115deg, rgba(160,30,20,.94) 0%, rgba(200,60,35,.82) 40%, rgba(249,115,22,.55) 100%);
}
.hero-wrap {
  width: 100%; max-width: 1200px; margin: 0 auto; padding: 0 20px;
  display: grid; grid-template-columns: 1.15fr .9fr; gap: 48px; align-items: center;
  position: relative; z-index: 1;
}
.hero-content { color: #fff; }
.hero-tag {
  display: inline-block; padding: 8px 18px; border-radius: 50px;
  background: rgba(255,255,255,.16); backdrop-filter: blur(6px);
  font-size: 14px; margin-bottom: 24px; border: 1px solid rgba(255,255,255,.18);
}
.hero h1 { font-size: clamp(42px, 7.5vw, 76px); line-height: 1.08; font-weight: 800; margin-bottom: 24px; text-shadow: 0 8px 40px rgba(0,0,0,.25); }
.hero-lead { font-size: clamp(18px, 2.8vw, 26px); margin-bottom: 20px; opacity: .98; line-height: 1.6; }
.hero-conditions {
  display: inline; background: rgba(0,0,0,.28); color: #fff;
  padding: 4px 10px; border-radius: 8px; font-weight: 800;
  box-decoration-break: clone; -webkit-box-decoration-break: clone;
}
.hero-highlight {
  background: linear-gradient(180deg, transparent 55%, rgba(255,255,255,.32) 55%);
  padding: 0 5px; border-radius: 4px; font-weight: 800;
}
.hero-sub { font-size: 16px; opacity: .88; margin-bottom: 38px; }
.hero-actions { display: flex; gap: 16px; flex-wrap: wrap; }
.hero-trust {
  display: flex; flex-wrap: wrap; gap: 14px 28px; margin-top: 36px;
}
.trust-item {
  display: flex; align-items: center; gap: 8px;
  background: rgba(255,255,255,.12); backdrop-filter: blur(4px);
  padding: 8px 16px; border-radius: 50px; font-size: 14px;
  border: 1px solid rgba(255,255,255,.14);
}
.trust-item svg { color: #FCD34D; }
.hero-card {
  background: rgba(255,255,255,.12); backdrop-filter: blur(14px);
  border: 1px solid rgba(255,255,255,.22); border-radius: 28px;
  padding: 38px 32px; color: #fff; text-align: center;
  box-shadow: 0 24px 60px rgba(0,0,0,.22);
  transform: translateY(0); transition: transform .5s ease;
}
.hero-card:hover { transform: translateY(-6px); }
.hero-card-icon {
  width: 70px; height: 70px; margin: 0 auto 18px;
  background: rgba(255,255,255,.2); border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
}
.hero-card-title { font-size: 26px; font-weight: 800; margin-bottom: 10px; }
.hero-card-text { font-size: 15px; opacity: .9; }
.hero-wave { position: absolute; left: 0; right: 0; bottom: -1px; height: 110px; z-index: 2; }
.hero-wave svg { width: 100%; height: 100%; }

/* 通用 section */
.section { padding: 92px 0; }
.section-head { text-align: center; max-width: 720px; margin: 0 auto 54px; }
.section-label {
  display: inline-block; padding: 6px 16px; border-radius: 50px; font-size: 13px; font-weight: 700;
  letter-spacing: .5px; margin-bottom: 14px;
}
.section-head h2 { font-size: clamp(26px, 4vw, 38px); font-weight: 800; margin-bottom: 12px; }
.section-head p { color: var(--c-text-muted); font-size: 17px; }

.section-cyan { background: linear-gradient(180deg, #F0FDFF 0%, #E0F7FA 100%); }
.section-red { background: linear-gradient(135deg, var(--c-danfeng) 0%, #E85335 100%); color: #fff; }
.section-red .section-head h2, .section-red .section-head p { color: #fff; }
.section-orange { background: linear-gradient(180deg, #FFFBF0 0%, #FFF4E0 100%); }
.section-green { background: linear-gradient(180deg, #F0FDF7 0%, #E0F8F0 100%); }
.section-purple { background: linear-gradient(180deg, #FAF5FF 0%, #F3E8FF 100%); }
.section-pink { background: linear-gradient(180deg, #FFF5F9 0%, #FCE7F3 100%); }
.section-blue { background: linear-gradient(180deg, #EFF6FF 0%, #DBEAFE 100%); }

/* 核心优势 */
.advantage-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 22px; }
.adv-card {
  background: #fff; border-radius: var(--radius-lg); padding: 28px 22px;
  box-shadow: var(--shadow-sm); transition: transform var(--transition), box-shadow var(--transition);
}
.adv-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-md); }
.adv-icon {
  width: 54px; height: 54px; border-radius: 16px; display: flex; align-items: center; justify-content: center;
  margin-bottom: 18px; color: #fff;
}
.adv-blue .adv-icon { background: linear-gradient(135deg, var(--c-blue), var(--c-cyan)); }
.adv-orange .adv-icon { background: linear-gradient(135deg, var(--c-orange), var(--c-orange-deep)); }
.adv-green .adv-icon { background: linear-gradient(135deg, var(--c-green), var(--c-lime)); }
.adv-purple .adv-icon { background: linear-gradient(135deg, var(--c-purple), var(--c-pink)); }
.adv-card h3 { font-size: 19px; margin-bottom: 10px; }
.adv-card p { font-size: 14.5px; color: var(--c-text-muted); line-height: 1.65; }
.adv-card strong { color: var(--c-text); }

/* 案例轮播 */
.carousel { position: relative; }
.carousel-viewport { overflow: hidden; border-radius: var(--radius-lg); }
.carousel-track { display: flex; transition: transform .5s cubic-bezier(.25,.8,.25,1); }
.case-card {
  flex: 0 0 calc(33.333% - 18px); margin-right: 18px; background: #fff;
  border-radius: var(--radius-lg); overflow: hidden; box-shadow: var(--shadow-sm);
  display: flex; flex-direction: column;
}
.case-photo { aspect-ratio: 4/3; overflow: hidden; flex-shrink: 0; }
.case-photo img { width: 100%; height: 100%; object-fit: cover; transition: transform .6s ease; }
.case-card:hover .case-photo img { transform: scale(1.05); }
.case-body { padding: 20px; flex: 1; display: flex; flex-direction: column; }
.case-body h4 { font-size: 17px; display: flex; align-items: center; gap: 8px; margin-bottom: 8px; }
.case-body h4 span { font-size: 12px; color: #fff; background: var(--c-danfeng); padding: 2px 8px; border-radius: 50px; font-weight: 600; }
.case-meta { font-size: 13px; color: var(--c-text-muted); margin-bottom: 10px; }
.case-review { font-size: 14px; color: var(--c-text); line-height: 1.6; position: relative; padding-left: 12px; border-left: 3px solid var(--c-danfeng); flex: 1; }
.carousel-btn {
  position: absolute; top: 50%; transform: translateY(-50%);
  width: 46px; height: 46px; border-radius: 50%; background: #fff; color: var(--c-text);
  box-shadow: var(--shadow-md); display: flex; align-items: center; justify-content: center; z-index: 5;
  transition: background var(--transition), color var(--transition);
}
.carousel-btn:hover { background: var(--c-danfeng); color: #fff; }
.carousel-btn.prev { left: -20px; }
.carousel-btn.next { right: -20px; }
.carousel-dots { display: flex; justify-content: center; gap: 8px; margin-top: 24px; }
.carousel-dot {
  width: 10px; height: 10px; border-radius: 50%; background: rgba(0,0,0,.15);
  transition: background var(--transition), transform var(--transition);
}
.carousel-dot.active { background: var(--c-danfeng); transform: scale(1.3); }

/* 数据墙 */
.stats-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; text-align: center; }
.stat-item { padding: 28px; border-radius: var(--radius-lg); background: rgba(255,255,255,.12); backdrop-filter: blur(4px); }
.stat-number { font-size: clamp(42px, 6vw, 68px); font-weight: 800; line-height: 1; margin-bottom: 8px; }
.stat-label { font-size: 16px; opacity: .9; }

/* 入户好处 */
.benefit-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.benefit-card {
  background: #fff; border-radius: var(--radius-md); padding: 24px 20px;
  box-shadow: var(--shadow-sm); transition: transform var(--transition), box-shadow var(--transition);
}
.benefit-card:hover { transform: translateY(-5px); box-shadow: var(--shadow-md); }
.benefit-icon {
  width: 46px; height: 46px; border-radius: 13px; display: flex; align-items: center; justify-content: center;
  margin-bottom: 14px; color: #fff;
}
.benefit-icon.b-1 { background: linear-gradient(135deg, #EF4444, #F97316); }
.benefit-icon.b-2 { background: linear-gradient(135deg, #EC4899, #F43F5E); }
.benefit-icon.b-3 { background: linear-gradient(135deg, #F59E0B, #EAB308); }
.benefit-icon.b-4 { background: linear-gradient(135deg, #0EA5E9, #06B6D4); }
.benefit-icon.b-5 { background: linear-gradient(135deg, #8B5CF6, #A855F7); }
.benefit-icon.b-6 { background: linear-gradient(135deg, #10B981, #22C55E); }
.benefit-icon.b-7 { background: linear-gradient(135deg, #14B8A6, #06B6D4); }
.benefit-icon.b-8 { background: linear-gradient(135deg, #6366F1, #818CF8); }
.benefit-icon.b-9 { background: linear-gradient(135deg, #D946EF, #EC4899); }
.benefit-icon.b-10 { background: linear-gradient(135deg, #F97316, #FB923C); }
.benefit-icon.b-11 { background: linear-gradient(135deg, #3B82F6, #60A5FA); }
.benefit-icon.b-12 { background: linear-gradient(135deg, #64748B, #94A3B8); }
.benefit-card h4 { font-size: 17px; margin-bottom: 6px; }
.benefit-card p { font-size: 14px; color: var(--c-text-muted); line-height: 1.55; }
.benefit-card.bg-1 { background: linear-gradient(135deg, #FFF5F3, #FFEBE8); }
.benefit-card.bg-2 { background: linear-gradient(135deg, #FFF0F5, #FCE7F3); }
.benefit-card.bg-3 { background: linear-gradient(135deg, #FFFBEB, #FEF3C7); }
.benefit-card.bg-4 { background: linear-gradient(135deg, #F0F9FF, #E0F2FE); }
.benefit-card.bg-5 { background: linear-gradient(135deg, #F5F3FF, #EDE9FE); }
.benefit-card.bg-6 { background: linear-gradient(135deg, #F0FDF4, #DCFCE7); }
.benefit-card.bg-7 { background: linear-gradient(135deg, #F0FDFA, #CCFBF1); }
.benefit-card.bg-8 { background: linear-gradient(135deg, #EEF2FF, #E0E7FF); }
.benefit-card.bg-9 { background: linear-gradient(135deg, #FDF4FF, #FAE8FF); }
.benefit-card.bg-10 { background: linear-gradient(135deg, #FFF7ED, #FFEDD5); }
.benefit-card.bg-11 { background: linear-gradient(135deg, #EFF6FF, #DBEAFE); }
.benefit-card.bg-12 { background: linear-gradient(135deg, #F8FAFC, #E2E8F0); }

/* 入户方式 */
.method-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 24px; }
.method-card {
  background: #fff; border-radius: var(--radius-lg); overflow: hidden; box-shadow: var(--shadow-sm);
  transition: transform var(--transition), box-shadow var(--transition);
}
.method-card:hover { transform: translateY(-5px); box-shadow: var(--shadow-md); }
.method-head {
  padding: 22px 24px; color: #fff; display: flex; align-items: center; gap: 16px;
}
.method-head.m-1 { background: linear-gradient(135deg, #0EA5E9, #06B6D4); }
.method-head.m-2 { background: linear-gradient(135deg, #8B5CF6, #A855F7); }
.method-head.m-3 { background: linear-gradient(135deg, #EC4899, #F43F5E); }
.method-head.m-4 { background: linear-gradient(135deg, #10B981, #22C55E); }
.method-num {
  width: 44px; height: 44px; border-radius: 50%; background: rgba(255,255,255,.2);
  display: flex; align-items: center; justify-content: center; font-weight: 800; font-size: 16px;
}
.method-head h3 { font-size: 20px; }
.method-body { padding: 22px 24px; }
.method-item { padding: 14px 0; border-bottom: 1px dashed #E5E7EB; }
.method-item:last-child { border-bottom: none; }
.method-item strong { color: var(--c-text); font-size: 15px; }
.method-item p { font-size: 14px; color: var(--c-text-muted); margin-top: 4px; line-height: 1.6; }

/* 办理流程 */
.timeline { position: relative; max-width: 900px; margin: 0 auto; }
.timeline::before {
  content: ''; position: absolute; left: 50%; top: 0; bottom: 0; width: 3px;
  background: linear-gradient(180deg, var(--c-danfeng), var(--c-purple), var(--c-blue));
  transform: translateX(-50%); border-radius: 3px;
}
.timeline-item { display: flex; justify-content: flex-end; padding-right: 50%; position: relative; margin-bottom: 30px; }
.timeline-item:nth-child(even) { justify-content: flex-start; padding-right: 0; padding-left: 50%; }
.timeline-dot {
  position: absolute; left: 50%; top: 0; transform: translateX(-50%);
  width: 46px; height: 46px; border-radius: 50%; color: #fff; display: flex; align-items: center; justify-content: center;
  font-weight: 800; box-shadow: 0 0 0 6px rgba(255,255,255,.7); z-index: 2;
}
.timeline-content {
  width: calc(100% - 50px); background: #fff; padding: 22px 24px; border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
}
.timeline-item:nth-child(odd) .timeline-content { margin-right: 24px; }
.timeline-item:nth-child(even) .timeline-content { margin-left: 24px; }
.timeline-content h4 { font-size: 18px; margin-bottom: 6px; }
.timeline-content p { font-size: 14px; color: var(--c-text-muted); }

/* FAQ */
.faq-list { max-width: 860px; margin: 0 auto; }
.faq-item {
  background: #fff; border-radius: var(--radius-md); margin-bottom: 12px;
  box-shadow: var(--shadow-sm); overflow: hidden;
}
.faq-q {
  width: 100%; display: flex; align-items: center; justify-content: space-between;
  padding: 18px 22px; font-size: 16px; font-weight: 600; text-align: left; color: var(--c-text);
}
.faq-q svg { flex-shrink: 0; color: var(--c-text-muted); transition: transform var(--transition); }
.faq-item.active .faq-q svg { transform: rotate(180deg); color: var(--c-danfeng); }
.faq-a {
  max-height: 0; overflow: hidden; transition: max-height .35s ease, padding .35s ease;
}
.faq-item.active .faq-a { max-height: 400px; padding: 0 22px 18px; }
.faq-a p { font-size: 15px; color: var(--c-text-muted); line-height: 1.7; }

/* 关于我们 */
.about-grid { display: grid; grid-template-columns: 1.1fr .9fr; gap: 48px; align-items: center; }
.about-content h2 { font-size: clamp(24px, 3.6vw, 34px); margin: 14px 0 18px; }
.about-content > p { font-size: 15.5px; color: var(--c-text-muted); margin-bottom: 14px; }
.promise-list { display: grid; grid-template-columns: repeat(2, 1fr); gap: 10px; margin: 22px 0; }
.promise-list li {
  display: flex; align-items: center; gap: 8px; font-size: 15px; font-weight: 600;
  background: #fff; padding: 10px 14px; border-radius: 50px; color: var(--c-text);
}
.promise-list svg { color: var(--c-green); }
.contact-block {
  background: #fff; border-radius: var(--radius-md); padding: 20px 22px; box-shadow: var(--shadow-sm);
}
.contact-block p { font-size: 15px; margin-bottom: 6px; color: var(--c-text-muted); }
.contact-block a { color: var(--c-danfeng); font-weight: 700; }
.about-media img { border-radius: var(--radius-lg); box-shadow: var(--shadow-md); }

/* 页脚 */
.footer {
  background: linear-gradient(135deg, #1F2937 0%, #111827 100%);
  color: #E5E7EB; padding: 64px 0 28px;
}
.footer-grid { display: grid; grid-template-columns: 1.6fr 1fr 1.2fr; gap: 40px; margin-bottom: 40px; }
.footer-brand img { height: 50px; width: auto; margin-bottom: 16px; }
.footer-brand p { font-size: 14px; color: #9CA3AF; line-height: 1.7; }
.footer-links h4, .footer-contact h4 { font-size: 16px; color: #fff; margin-bottom: 16px; }
.footer-links ul { display: grid; grid-template-columns: repeat(2, 1fr); gap: 8px 20px; }
.footer-links li { margin-bottom: 0; }
.footer-links a { font-size: 14px; color: #9CA3AF; transition: color var(--transition); }
.footer-links a:hover { color: #fff; }
.footer-contact p { font-size: 14px; color: #9CA3AF; margin-bottom: 8px; }
.footer-contact a { color: #fff; }
.footer-bottom {
  border-top: 1px solid rgba(255,255,255,.1); padding-top: 24px;
  display: flex; flex-wrap: wrap; justify-content: center; gap: 12px 28px; font-size: 13px; color: #9CA3AF; text-align: center;
}
.footer-bottom a { color: #D1D5DB; text-decoration: underline; }

/* 浮动按钮 */
.fab-group { position: fixed; right: 18px; bottom: 24px; z-index: 900; display: flex; flex-direction: column; gap: 12px; }
.fab {
  width: 52px; height: 52px; border-radius: 50%; display: flex; align-items: center; justify-content: center;
  color: #fff; box-shadow: var(--shadow-md); transition: transform var(--transition), opacity var(--transition);
}
.fab:hover { transform: scale(1.08); }
.fab-phone { background: linear-gradient(135deg, var(--c-danfeng), var(--c-orange-deep)); }
.fab-wechat { background: linear-gradient(135deg, var(--c-green), #22C55E); }
.fab-top { background: #374151; opacity: 0; pointer-events: none; }
.fab-top.visible { opacity: 1; pointer-events: auto; }

/* 微信弹窗 */
.modal {
  position: fixed; inset: 0; z-index: 2000;
  display: flex; align-items: center; justify-content: center;
  opacity: 0; pointer-events: none; transition: opacity var(--transition); padding: 20px;
}
.modal.active { opacity: 1; pointer-events: auto; }
.modal-overlay { position: absolute; inset: 0; background: rgba(0,0,0,.55); }
.modal-content {
  position: relative; background: #fff; border-radius: var(--radius-lg); padding: 32px;
  text-align: center; max-width: 360px; width: 100%; box-shadow: var(--shadow-lg);
  transform: translateY(20px) scale(.96); transition: transform var(--transition);
}
.modal.active .modal-content { transform: translateY(0) scale(1); }
.modal-content img { margin: 0 auto 16px; border-radius: var(--radius-sm); }
.modal-content p { font-size: 15px; color: var(--c-text-muted); }
.modal-content .wechat-id { color: var(--c-text); font-weight: 700; font-size: 16px; margin-top: 4px; }
.modal-close {
  position: absolute; top: 12px; right: 12px; width: 34px; height: 34px;
  border-radius: 50%; background: #F3F4F6; color: var(--c-text);
  display: flex; align-items: center; justify-content: center;
}

/* 滚动动画 */
.reveal { opacity: 0; transform: translateY(28px); transition: opacity .6s ease, transform .6s ease; }
.reveal.visible { opacity: 1; transform: translateY(0); }

/* 响应式 */
@media (max-width: 1024px) {
  .advantage-grid { grid-template-columns: repeat(2, 1fr); }
  .case-card { flex: 0 0 calc(50% - 12px); margin-right: 12px; }
  .benefit-grid { grid-template-columns: repeat(2, 1fr); }
  .method-grid { grid-template-columns: 1fr; }
}

@media (max-width: 900px) {
  .nav-menu, .nav-cta { display: none; }
  .menu-toggle { display: flex; }
  .navbar { height: 72px; }
  .logo img { height: 48px; }
  .hero { padding: 110px 0 100px; }
  .hero-wrap { grid-template-columns: 1fr; gap: 28px; }
  .hero-card { display: none; }
  .hero h1 { font-size: 34px; }
  .hero h1 br { display: none; }
  .hero-lead { font-size: 18px; }
  .hero-actions { flex-direction: column; align-items: flex-start; }
  .hero-actions .btn { width: auto; }
  .hero-trust { gap: 10px 16px; margin-top: 28px; }
  .trust-item { padding: 7px 13px; font-size: 13px; }
  .section { padding: 68px 0; }
  .section-head { margin-bottom: 38px; }
  .stats-grid { grid-template-columns: 1fr; gap: 14px; }
  .about-grid { grid-template-columns: 1fr; }
  .about-media { order: -1; }
  .footer-grid { grid-template-columns: 1fr; gap: 32px; }
  .carousel-btn { display: none; }
  .carousel-viewport { border-radius: 0; }
  .case-card { flex: 0 0 100%; margin-right: 0; }
  .case-photo { aspect-ratio: 16/9; }
  .case-body { padding: 16px; }
  .case-body h4 { font-size: 16px; }
  .case-review { font-size: 13px; line-height: 1.55; }
  .timeline::before { left: 20px; }
  .timeline-item, .timeline-item:nth-child(even) { justify-content: flex-start; padding-left: 56px; padding-right: 0; }
  .timeline-dot { left: 20px; transform: translateX(-50%); }
  .timeline-content { width: 100%; margin-left: 0 !important; margin-right: 0 !important; }
}

@media (max-width: 640px) {
  .container { padding: 0 16px; }
  .advantage-grid { grid-template-columns: 1fr; }
  .benefit-grid { grid-template-columns: 1fr; }
  .hero h1 { font-size: 32px; }
  .hero-lead { font-size: 17px; }
  .hero-trust { flex-direction: column; gap: 8px; }
  .promise-list { grid-template-columns: 1fr; }
  .footer-bottom { flex-direction: column; gap: 6px; }
  .fab { width: 48px; height: 48px; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation-duration: .01ms !important; transition-duration: .01ms !important; }
  html { scroll-behavior: auto; }
}