/* ============================================
   幻实科技 FDE 官网样式 (dofde.com)
   响应式设计 - 兼容 PC / 平板 / 手机
   ============================================ */

:root {
  --primary: #0a4de6;
  --primary-dark: #083bb0;
  --primary-light: #e8efff;
  --accent: #00c6a2;
  --dark: #0b1b33;
  --text: #23324a;
  --text-light: #5b6b85;
  --bg: #ffffff;
  --bg-soft: #f6f8fc;
  --border: #e4e9f2;
  --radius: 14px;
  --shadow: 0 6px 24px rgba(11, 27, 51, 0.08);
  --shadow-lg: 0 16px 48px rgba(11, 27, 51, 0.14);
  --max-w: 1200px;
  --nav-h: 68px;
}

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

html { scroll-behavior: smooth; }

body {
  font-family: "PingFang SC", "HarmonyOS Sans SC", "Microsoft YaHei", "Hiragino Sans GB", system-ui, -apple-system, sans-serif;
  color: var(--text);
  background: var(--bg);
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
}

img { max-width: 100%; display: block; }
a { color: var(--primary); text-decoration: none; }
a:hover { color: var(--primary-dark); }

.container {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 24px;
}

/* ---------- 顶部导航 ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255, 255, 255, 0.94);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
}

.nav-wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: var(--nav-h);
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  color: var(--dark);
  font-size: 1.15rem;
}

.brand-mark {
  width: 38px;
  height: 38px;
  border-radius: 10px;
  background: linear-gradient(135deg, var(--primary), var(--accent));
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.85rem;
  font-weight: 800;
  letter-spacing: 0.5px;
  flex-shrink: 0;
}

.brand small {
  display: block;
  font-size: 0.66rem;
  font-weight: 500;
  color: var(--text-light);
  letter-spacing: 2px;
  line-height: 1.2;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 6px;
  list-style: none;
}

.nav-links a {
  color: var(--text);
  font-size: 0.95rem;
  padding: 8px 14px;
  border-radius: 8px;
  font-weight: 500;
  transition: all 0.2s;
}

.nav-links a:hover { color: var(--primary); background: var(--primary-light); }
.nav-links a.active { color: var(--primary); font-weight: 700; }

.nav-cta {
  background: var(--primary) !important;
  color: #fff !important;
  padding: 9px 20px !important;
  border-radius: 999px !important;
  font-weight: 600;
  box-shadow: 0 4px 14px rgba(10, 77, 230, 0.32);
}

.nav-cta:hover { background: var(--primary-dark) !important; }

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px;
}

.nav-toggle span {
  width: 22px;
  height: 2.5px;
  background: var(--dark);
  border-radius: 2px;
  transition: all 0.25s;
}

/* ---------- 通用区块 ---------- */
.section { padding: 80px 0; }
.section-soft { background: var(--bg-soft); }

.section-head { text-align: center; max-width: 760px; margin: 0 auto 56px; }

.eyebrow {
  display: inline-block;
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 3px;
  color: var(--primary);
  text-transform: uppercase;
  margin-bottom: 12px;
}

.section-head h2 {
  font-size: clamp(1.6rem, 3.2vw, 2.3rem);
  color: var(--dark);
  line-height: 1.35;
  margin-bottom: 16px;
}

.section-head p { color: var(--text-light); font-size: 1.02rem; }

/* ---------- Hero ---------- */
.hero {
  background:
    radial-gradient(900px 420px at 85% -10%, rgba(0, 198, 162, 0.14), transparent 60%),
    radial-gradient(1000px 520px at 10% -20%, rgba(10, 77, 230, 0.16), transparent 60%),
    linear-gradient(180deg, #f2f6ff 0%, #ffffff 100%);
  padding: 96px 0 80px;
  overflow: hidden;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 56px;
  align-items: center;
}

.hero h1 {
  font-size: clamp(1.9rem, 4.2vw, 3.1rem);
  color: var(--dark);
  line-height: 1.28;
  margin-bottom: 20px;
  font-weight: 800;
}

.hero h1 .grad {
  background: linear-gradient(92deg, var(--primary), var(--accent));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.hero-sub {
  font-size: 1.1rem;
  color: var(--text-light);
  max-width: 560px;
  margin-bottom: 36px;
}

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

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 14px 30px;
  border-radius: 999px;
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  border: none;
  transition: all 0.22s;
  line-height: 1.2;
}

.btn-primary {
  background: linear-gradient(92deg, var(--primary), #2f6bff);
  color: #fff;
  box-shadow: 0 8px 24px rgba(10, 77, 230, 0.35);
}
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 12px 30px rgba(10, 77, 230, 0.42); color: #fff; }

.btn-outline {
  background: #fff;
  color: var(--primary);
  border: 1.5px solid var(--primary);
}
.btn-outline:hover { background: var(--primary-light); color: var(--primary-dark); }

.hero-stats {
  display: flex;
  gap: 40px;
  margin-top: 48px;
  flex-wrap: wrap;
}

.stat-num {
  font-size: 1.9rem;
  font-weight: 800;
  color: var(--dark);
  line-height: 1.2;
}

.stat-num em { font-style: normal; color: var(--primary); }
.stat-label { font-size: 0.85rem; color: var(--text-light); }

/* Hero 视觉卡 */
.hero-visual { position: relative; }

.hero-card {
  background: #fff;
  border-radius: 18px;
  box-shadow: var(--shadow-lg);
  border: 1px solid var(--border);
  padding: 26px;
  position: relative;
  z-index: 2;
}

.hero-card h3 { font-size: 1rem; color: var(--dark); margin-bottom: 16px; display: flex; align-items: center; gap: 8px; }
.hero-card h3::before { content: ""; width: 8px; height: 8px; border-radius: 50%; background: var(--accent); }

.flow-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 14px;
  border-radius: 10px;
  background: var(--bg-soft);
  margin-bottom: 10px;
  font-size: 0.9rem;
}

.flow-item .fi-ico {
  width: 34px; height: 34px;
  border-radius: 9px;
  background: var(--primary-light);
  color: var(--primary);
  display: flex; align-items: center; justify-content: center;
  font-weight: 700; font-size: 0.8rem; flex-shrink: 0;
}

.flow-item b { color: var(--dark); font-weight: 600; }

.hero-blob {
  position: absolute;
  width: 320px; height: 320px;
  border-radius: 50%;
  background: linear-gradient(135deg, rgba(10,77,230,.14), rgba(0,198,162,.14));
  top: -60px; right: -50px;
  z-index: 1;
  filter: blur(2px);
}

/* ---------- 卡片网格 ---------- */
.grid { display: grid; gap: 24px; }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }
.grid-2 { grid-template-columns: repeat(2, 1fr); }

.card {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 30px 26px;
  transition: all 0.25s;
  box-shadow: 0 2px 10px rgba(11,27,51,0.04);
}

.card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
  border-color: rgba(10, 77, 230, 0.3);
}

.card-ico {
  width: 52px; height: 52px;
  border-radius: 13px;
  background: var(--primary-light);
  color: var(--primary);
  display: flex; align-items: center; justify-content: center;
  font-size: 1.5rem;
  margin-bottom: 18px;
}

.card h3 { font-size: 1.12rem; color: var(--dark); margin-bottom: 10px; }
.card p { font-size: 0.92rem; color: var(--text-light); }
.card ul { margin-top: 12px; padding-left: 0; list-style: none; }
.card ul li {
  font-size: 0.88rem; color: var(--text-light);
  padding: 4px 0 4px 20px; position: relative;
}
.card ul li::before {
  content: "✓"; position: absolute; left: 0;
  color: var(--accent); font-weight: 700;
}

/* ---------- 行业标签 ---------- */
.industry-tag {
  display: inline-block;
  padding: 5px 14px;
  border-radius: 999px;
  background: var(--primary-light);
  color: var(--primary);
  font-size: 0.82rem;
  font-weight: 600;
  margin: 4px 4px 0 0;
}

/* ---------- 城市网络 ---------- */
.city-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }

.city-card {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px;
  text-align: center;
  transition: all 0.25s;
  position: relative;
  overflow: hidden;
}

.city-card::before {
  content: "";
  position: absolute; top: 0; left: 0; right: 0; height: 4px;
  background: linear-gradient(90deg, var(--primary), var(--accent));
}

.city-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); }
.city-name { font-size: 1.35rem; font-weight: 800; color: var(--dark); margin-bottom: 4px; }
.city-en { font-size: 0.75rem; letter-spacing: 2px; color: var(--text-light); text-transform: uppercase; }
.city-status {
  display: inline-block; margin-top: 14px;
  font-size: 0.8rem; font-weight: 600;
  color: #0a8f6f; background: rgba(0,198,162,.12);
  padding: 4px 14px; border-radius: 999px;
}

.city-coming {
  border-style: dashed;
  background: transparent;
}
.city-coming .city-status { color: var(--text-light); background: var(--bg-soft); }

/* ---------- 步骤流程 ---------- */
.steps { counter-reset: step; display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }

.step {
  position: relative;
  background: #fff;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 30px 24px;
}

.step::before {
  counter-increment: step;
  content: "0" counter(step);
  font-size: 2.4rem;
  font-weight: 800;
  color: var(--primary);
  opacity: 0.18;
  display: block;
  margin-bottom: 6px;
  line-height: 1;
}

.step h3 { font-size: 1.05rem; color: var(--dark); margin-bottom: 8px; }
.step p { font-size: 0.9rem; color: var(--text-light); }

/* ---------- FAQ ---------- */
.faq-list { max-width: 820px; margin: 0 auto; }

details.faq {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: 12px;
  margin-bottom: 14px;
  overflow: hidden;
}

details.faq summary {
  list-style: none;
  cursor: pointer;
  padding: 20px 24px;
  font-weight: 600;
  color: var(--dark);
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  font-size: 1rem;
}

details.faq summary::-webkit-details-marker { display: none; }
details.faq summary::after {
  content: "+";
  font-size: 1.4rem;
  color: var(--primary);
  font-weight: 400;
  flex-shrink: 0;
  transition: transform 0.2s;
}
details.faq[open] summary::after { transform: rotate(45deg); }
details.faq .faq-body { padding: 0 24px 20px; color: var(--text-light); font-size: 0.94rem; }

/* ---------- 双通道 CTA ---------- */
.cta-duo { display: grid; grid-template-columns: 1fr 1fr; gap: 24px; }

.cta-panel {
  border-radius: 18px;
  padding: 44px 36px;
  position: relative;
  overflow: hidden;
}

.cta-panel.dark {
  background: linear-gradient(135deg, #0b1b33, #123a7a);
  color: #fff;
}

.cta-panel.light {
  background: linear-gradient(135deg, #eef4ff, #e6faf5);
  border: 1px solid var(--border);
}

.cta-panel h3 { font-size: 1.45rem; margin-bottom: 12px; color: var(--dark); }
.cta-panel.dark h3 { color: #fff; }
.cta-panel p { font-size: 0.95rem; margin-bottom: 24px; }
.cta-panel.light p { color: var(--text-light); }
.cta-panel.dark p { color: rgba(255,255,255,0.82); }
.cta-panel.dark .btn-outline { background: transparent; color: #fff; border-color: rgba(255,255,255,0.6); }
.cta-panel.dark .btn-outline:hover { background: rgba(255,255,255,0.12); color: #fff; }

/* ---------- 联系页 & 表单 ---------- */
.contact-grid { display: grid; grid-template-columns: 0.9fr 1.1fr; gap: 48px; align-items: start; }

.contact-card {
  background: linear-gradient(135deg, #0b1b33, #123a7a);
  border-radius: 18px;
  color: #fff;
  padding: 36px;
}

.contact-card h3 { font-size: 1.3rem; margin-bottom: 22px; }

.contact-item {
  display: flex; align-items: center; gap: 14px;
  padding: 14px 0;
  border-bottom: 1px solid rgba(255,255,255,0.12);
  font-size: 0.95rem;
}

.contact-item:last-child { border-bottom: none; }
.contact-item .ci-ico {
  width: 40px; height: 40px; flex-shrink: 0;
  border-radius: 10px; background: rgba(255,255,255,0.12);
  display: flex; align-items: center; justify-content: center;
  font-size: 1.1rem;
}

.contact-item small { display: block; opacity: 0.65; font-size: 0.75rem; }
.contact-item a { color: #fff; font-weight: 600; }
.contact-item a:hover { opacity: 0.8; }

.form-card {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: 18px;
  padding: 36px;
  box-shadow: var(--shadow);
}

.form-card h3 { color: var(--dark); margin-bottom: 6px; font-size: 1.25rem; }
.form-card > p { color: var(--text-light); font-size: 0.9rem; margin-bottom: 24px; }

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

.field { margin-bottom: 16px; }

.field label {
  display: block;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--dark);
  margin-bottom: 6px;
}

.field label .req { color: #e5484d; }

.field input, .field select, .field textarea {
  width: 100%;
  padding: 12px 14px;
  border: 1.5px solid var(--border);
  border-radius: 10px;
  font-size: 0.95rem;
  font-family: inherit;
  color: var(--text);
  background: #fff;
  transition: border-color 0.2s, box-shadow 0.2s;
}

.field input:focus, .field select:focus, .field textarea:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(10, 77, 230, 0.12);
}

.field textarea { resize: vertical; min-height: 120px; }

.form-note { font-size: 0.8rem; color: var(--text-light); margin-top: 12px; }

.form-success {
  display: none;
  background: rgba(0, 198, 162, 0.1);
  border: 1px solid rgba(0, 198, 162, 0.4);
  color: #0a8f6f;
  border-radius: 10px;
  padding: 14px 18px;
  font-size: 0.9rem;
  margin-bottom: 18px;
}

.form-success.show { display: block; }

/* ---------- 页面通用 hero（内页） ---------- */
.page-hero {
  background:
    radial-gradient(800px 400px at 90% -20%, rgba(0,198,162,0.12), transparent 60%),
    radial-gradient(800px 400px at 0% -30%, rgba(10,77,230,0.14), transparent 60%),
    linear-gradient(180deg, #f2f6ff, #fff);
  padding: 72px 0 56px;
  text-align: center;
}

.page-hero h1 {
  font-size: clamp(1.7rem, 3.5vw, 2.5rem);
  color: var(--dark);
  margin-bottom: 14px;
  font-weight: 800;
}

.page-hero p { color: var(--text-light); max-width: 680px; margin: 0 auto; font-size: 1.02rem; }

/* 面包屑 */
.breadcrumb {
  font-size: 0.85rem;
  color: var(--text-light);
  margin-bottom: 18px;
}

.breadcrumb a { color: var(--text-light); }
.breadcrumb a:hover { color: var(--primary); }
.breadcrumb .sep { margin: 0 8px; }

/* ---------- 表格（加盟流程等） ---------- */
.table-wrap { overflow-x: auto; border-radius: var(--radius); border: 1px solid var(--border); background: #fff; }

table.data { width: 100%; border-collapse: collapse; font-size: 0.92rem; min-width: 560px; }

table.data th {
  background: var(--bg-soft);
  color: var(--dark);
  text-align: left;
  padding: 14px 18px;
  font-weight: 700;
  border-bottom: 1px solid var(--border);
  white-space: nowrap;
}

table.data td {
  padding: 14px 18px;
  border-bottom: 1px solid var(--border);
  color: var(--text-light);
  vertical-align: top;
}

table.data tr:last-child td { border-bottom: none; }
table.data td b { color: var(--dark); }

/* ---------- 高亮横幅 ---------- */
.banner {
  background: linear-gradient(92deg, var(--primary), #2f6bff);
  border-radius: 18px;
  color: #fff;
  padding: 48px 40px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 32px;
  flex-wrap: wrap;
  box-shadow: 0 16px 40px rgba(10, 77, 230, 0.28);
}

.banner h3 { font-size: 1.5rem; margin-bottom: 8px; }
.banner p { opacity: 0.88; font-size: 0.98rem; }
.banner .btn { background: #fff; color: var(--primary); }
.banner .btn:hover { background: #f0f4ff; color: var(--primary-dark); }

/* ---------- 页脚 ---------- */
.site-footer {
  background: var(--dark);
  color: rgba(255,255,255,0.72);
  padding: 64px 0 28px;
  margin-top: 0;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr 1.2fr;
  gap: 40px;
  margin-bottom: 44px;
}

.footer-grid h4 {
  color: #fff;
  font-size: 1rem;
  margin-bottom: 18px;
  font-weight: 600;
}

.footer-grid p { font-size: 0.88rem; line-height: 1.9; }
.footer-grid ul { list-style: none; }
.footer-grid ul li { margin-bottom: 10px; }
.footer-grid ul a { color: rgba(255,255,255,0.72); font-size: 0.9rem; }
.footer-grid ul a:hover { color: #fff; }

.footer-brand {
  display: flex; align-items: center; gap: 10px;
  color: #fff; font-weight: 700; font-size: 1.1rem; margin-bottom: 14px;
}

.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.12);
  padding-top: 24px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 10px;
  font-size: 0.82rem;
}

.footer-bottom a { color: rgba(255,255,255,0.72); }
.footer-bottom a:hover { color: #fff; }

.icp-link { display: inline-flex; align-items: center; gap: 6px; }

/* ---------- 回到顶部 ---------- */
.back-top {
  position: fixed;
  right: 24px; bottom: 24px;
  width: 44px; height: 44px;
  border-radius: 50%;
  background: var(--primary);
  color: #fff;
  border: none;
  cursor: pointer;
  font-size: 1.1rem;
  box-shadow: 0 6px 18px rgba(10,77,230,0.4);
  opacity: 0;
  visibility: hidden;
  transition: all 0.25s;
  z-index: 90;
}

.back-top.show { opacity: 1; visibility: visible; }
.back-top:hover { background: var(--primary-dark); }

/* ============ 响应式 ============ */
@media (max-width: 1024px) {
  .grid-4 { grid-template-columns: repeat(2, 1fr); }
  .grid-3 { grid-template-columns: repeat(2, 1fr); }
  .steps { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 900px) {
  .hero-grid { grid-template-columns: 1fr; gap: 44px; }
  .hero-visual { max-width: 520px; }
  .city-grid { grid-template-columns: repeat(3, 1fr); }
  .contact-grid { grid-template-columns: 1fr; }
  .cta-duo { grid-template-columns: 1fr; }
}

@media (max-width: 768px) {
  .section { padding: 56px 0; }
  .hero { padding: 64px 0 56px; }
  .hero-stats { gap: 26px; }

  .nav-toggle { display: flex; }

  .nav-links {
    position: fixed;
    top: var(--nav-h);
    left: 0; right: 0;
    background: #fff;
    flex-direction: column;
    align-items: stretch;
    padding: 16px 24px 24px;
    gap: 4px;
    border-bottom: 1px solid var(--border);
    box-shadow: var(--shadow-lg);
    transform: translateY(-12px);
    opacity: 0;
    visibility: hidden;
    transition: all 0.25s;
  }

  .nav-links.open { transform: translateY(0); opacity: 1; visibility: visible; }
  .nav-links a { padding: 12px 14px; display: block; }
  .nav-cta { text-align: center; margin-top: 8px; }

  .grid-3, .grid-4, .grid-2, .steps, .city-grid { grid-template-columns: 1fr; }
  .form-row { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; gap: 32px; }
  .footer-bottom { justify-content: center; text-align: center; }
  .banner { padding: 36px 26px; }
  .form-card, .contact-card { padding: 26px 20px; }
  .cta-panel { padding: 34px 24px; }
}

@media (max-width: 480px) {
  .hero-actions .btn { width: 100%; }
  .hero-stats { flex-direction: column; gap: 18px; }
}

/* 无障碍：跳转链接 */
.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
  background: var(--primary);
  color: #fff;
  padding: 10px 18px;
  border-radius: 0 0 10px 0;
  z-index: 200;
}

.skip-link:focus { left: 0; }

/* 动画入场 */
@keyframes fadeUp {
  from { opacity: 0; transform: translateY(24px); }
  to { opacity: 1; transform: translateY(0); }
}

.anim { animation: fadeUp 0.7s ease both; }
.anim-d1 { animation-delay: 0.1s; }
.anim-d2 { animation-delay: 0.2s; }
.anim-d3 { animation-delay: 0.3s; }

@media (prefers-reduced-motion: reduce) {
  .anim { animation: none; }
  html { scroll-behavior: auto; }
}