/* ====== Global ====== */
:root{
  --blue:#0b5ea8;
  --blue-dark:#084a84;
  --text:#1c1c1c;
  --muted:#6b7280;
  --bg:#ffffff;
  --border:#e5e7eb;
  --maxw:1100px;
  --shadow:0 10px 24px rgba(0,0,0,.12);
  --radius:14px;
}
*{ box-sizing:border-box; }
html,body{ margin:0; padding:0; font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Microsoft YaHei", "Noto Sans CJK SC", Arial, sans-serif; color:var(--text); background:#fff; }
a{ color:inherit; }
.container{ max-width:var(--maxw); margin:0 auto; padding:0 16px; }
.section{ padding:44px 0; }
.section.tight{ padding:28px 0; }
.section-title{
  text-align:center;
  color:#1f6fbf;
  font-size:22px;
  font-weight:800;
  margin:0 0 16px;
  letter-spacing:.5px;
}
.section-subtitle{
  text-align:center;
  color:var(--muted);
  font-size:13px;
  margin:0 0 28px;
}
.lead{ font-size:14px; color:#333; line-height:1.9; }
.hr{ height:1px; background:var(--border); margin:18px 0; }

.btn{
  display:inline-flex; align-items:center; justify-content:center;
  height:38px; padding:0 16px;
  border-radius:8px; border:1px solid transparent;
  background:var(--blue); color:#fff;
  text-decoration:none; font-weight:700; font-size:13px;
  cursor:pointer;
}
.btn:hover{ background:var(--blue-dark); }
.btn.ghost{ background:#fff; color:var(--blue); border-color:var(--blue); }
.btn.ghost:hover{ background:#f3f8ff; }

/* ===== Header + Nav ===== */
.site-header{ background:var(--bg); border-bottom:1px solid var(--border); }
.top-header{
  max-width:var(--maxw);
  margin:0 auto;
  padding:18px 16px 10px;
  display:flex;
  align-items:flex-end;
  justify-content:space-between;
  gap:12px;
}
.brand-title{
  font-size:30px;
  font-weight:800;
  color:#1f6fbf;
  line-height:1.1;
  letter-spacing:.5px;
  white-space:nowrap;
}
.brand-subtitle{
  margin-top:6px;
  font-size:13px;
  color:#7a7a7a;
}
.brand-right{ display:flex; align-items:center; gap:14px; }
.brand-slogan{
  font-size:28px;
  font-weight:800;
  width: 90px;
  overflow: hidden;
  color:#1f6fbf;
  white-space:nowrap;
}
.main-nav{ background:var(--blue); }
.menu{
  max-width:var(--maxw);
  margin:0 auto;
  padding:0 6px;
  list-style:none;
  display:flex;
  align-items:stretch;
  justify-content:center;
  gap:0;
}
.menu-item{ position:relative; display:flex; align-items:stretch; }
.menu-link{
  display:flex; align-items:center; justify-content:center;
  height:44px; padding:0 18px;
  color:#fff; text-decoration:none; font-size:15px;
  white-space:nowrap;
  border-left:1px solid rgba(255,255,255,.15);
  background:transparent;
}
.menu-item:first-child .menu-link{ border-left:none; }
.menu-link:hover{ background:rgba(255,255,255,.12); }
.menu-link.active{ background:rgba(255,255,255,.18); font-weight:800; }
.menu-link.as-button{ border:0; cursor:pointer; font-family:inherit; }

.has-sub .submenu{
  position:absolute; top:44px; left:0;
  min-width:220px;
  background:#fff; border:1px solid var(--border);
  box-shadow:var(--shadow);
  list-style:none; padding:8px 0; margin:0;
  display:none; z-index:50;
}
.has-sub .submenu a{
  display:block; padding:10px 14px;
  color:var(--text); text-decoration:none; font-size:14px;
}
.has-sub .submenu a:hover{ background:#f3f4f6; }

.sub-toggle{
  display:none;
  width:34px; border:0; background:transparent;
  cursor:pointer; position:relative;
}
.sub-toggle::after{
  content:"";
  width:0;height:0;
  border-left:5px solid transparent;
  border-right:5px solid transparent;
  border-top:6px solid #fff;
  position:absolute; left:50%; top:50%;
  transform:translate(-50%,-35%);
  opacity:.95;
}

.nav-toggle{
  display:none;
  width:42px; height:38px;
  border:1px solid var(--border);
  border-radius:8px;
  background:#fff;
  cursor:pointer;
  padding:8px;
}
.nav-toggle span{ display:block; height:2px; background:#111; margin:5px 0; }

@media (min-width: 960px){
  .has-sub:hover > .submenu{ display:block; }
}

@media (max-width: 959px){
  .brand-title{ font-size:22px; }
  .brand-slogan{ font-size:18px; }
  .nav-toggle{ display:inline-flex; flex-direction:column; justify-content:center; }
  .menu{
    flex-direction:column;
    align-items:stretch;
    justify-content:flex-start;
    padding:0;
    display:none;
  }
  .menu.open{ display:flex; }
  .menu-link{
    border-left:none;
    border-top:1px solid rgba(255,255,255,.18);
    justify-content:flex-start;
    padding:0 12px;
  }
  .menu-item{ flex-direction:column; }
  .sub-toggle{ display:block; position:absolute; right:6px; top:0; height:44px; }
  .has-sub{ position:relative; }
  .has-sub .submenu{
    position:static;
    border:0; box-shadow:none; padding:0;
    display:none;
  }
  .has-sub.open .submenu{ display:block; }
  .has-sub .submenu a{ padding:12px 12px; border-top:1px solid #f0f0f0; }
  .has-sub .submenu a:hover{ background:#f9fafb; }
}

/* ===== Hero (Home) ===== */
.hero{
  position:relative;
  min-height:420px;
  background: radial-gradient(1200px 500px at 70% 30%, rgba(255,255,255,.12), rgba(0,0,0,.75)),
              linear-gradient(120deg, #0b1220, #0b5ea8);
  color:#fff;
  overflow:hidden;
}
.hero .container{ position:relative; padding:54px 16px; }
.hero h1{
  font-size:44px; margin:0 0 8px; font-weight:900; letter-spacing:1px;
}
.hero h2{
  font-size:36px; margin:0 0 8px; font-weight:900; letter-spacing:1px;
}
.hero .tagline{ font-size:14px; opacity:.95; margin:10px 0 0; line-height:1.7; }
.hero .badge{ display:inline-block; margin-top:12px; padding:6px 10px; border-radius:999px; background:rgba(255,255,255,.12); font-weight:700; font-size:12px; }
.hero .dots{
  position:absolute; left:50%; bottom:14px;
  transform:translateX(-50%);
  display:flex; gap:8px;
}
.hero .dot{
  width:9px; height:9px; border-radius:50%;
  border:1px solid rgba(255,255,255,.7);
  background:transparent; cursor:pointer;
}
.hero .dot.active{ background:#fff; }

/* ===== Cards ===== */
.grid{ display:grid; gap:18px; }
.grid.cols-3{ grid-template-columns: repeat(3, 1fr); }
.grid.cols-4{ grid-template-columns: repeat(4, 1fr); }
@media (max-width: 959px){
  .grid.cols-3, .grid.cols-4{ grid-template-columns:1fr; }
}
.card{
  border:1px solid var(--border);
  border-radius:var(--radius);
  background:#fff;
  box-shadow:0 2px 10px rgba(0,0,0,.04);
  overflow:hidden;
}
.card-body{ padding:18px; }
.card h3{ margin:0 0 10px; font-size:16px; }
.card p{ margin:0 0 14px; color:#444; font-size:13px; line-height:1.8; }
.card.center{ text-align:center; }
.icon{
  width:44px; height:44px;
  margin:6px auto 10px;
  border-radius:12px;
  display:flex; align-items:center; justify-content:center;
  background:#f1f7ff;
  color:var(--blue);
}

/* ===== Tables ===== */
.table-wrap{ overflow:auto; border:1px solid var(--border); border-radius:12px; }
table{ border-collapse:collapse; width:100%; min-width:780px; }
th,td{ border:1px solid var(--border); padding:10px 12px; font-size:13px; vertical-align:top; }
th{ background:#f4f8ff; color:#0b5ea8; font-weight:900; }
thead th{ position:sticky; top:0; z-index:1; }
.caption{ text-align:center; color:#111; font-weight:800; margin:0 0 12px; }

/* ===== Blog / Case cards ===== */
.case-meta{ font-size:12px; color:var(--muted); margin-top:8px; display:flex; gap:12px; justify-content:flex-start; }
.case-meta span{ display:inline-flex; align-items:center; gap:6px; }

/* ===== Gallery ===== */
.gallery{
  display:grid;
  grid-template-columns: repeat(4, 1fr);
  gap:16px;
}
@media (max-width: 959px){
  .gallery{ grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 520px){
  .gallery{ grid-template-columns: 1fr; }
}
.figure{
  border:1px solid var(--border);
  border-radius:14px;
  overflow:hidden;
  background:#fff;
}
.figure .ph{
  height:140px;
  background:linear-gradient(135deg, #e5e7eb, #f8fafc);
}
.figure figcaption{
  padding:10px 12px;
  font-size:12px;
  color:#555;
}

/* ===== Testimonials (Experience) ===== */
.tabs{
  display:flex; gap:10px; justify-content:center; align-items:center;
}
.pager{ font-size:12px; color:var(--muted); }

/* ===== Forms ===== */
.form{
  max-width:880px;
  margin:0 auto;
  border:1px solid var(--border);
  border-radius:18px;
  padding:22px;
  background:#fff;
}
.form-grid{
  display:grid;
  grid-template-columns: repeat(3, 1fr);
  gap:14px;
}
@media (max-width: 959px){
  .form-grid{ grid-template-columns:1fr; }
}
.field label{ display:block; font-size:12px; color:#444; margin-bottom:6px; }
.field input, .field textarea{
  width:100%;
  border:1px solid var(--border);
  border-radius:10px;
  padding:10px 12px;
  font-size:14px;
  outline:none;
}
.field textarea{ min-height:120px; resize:vertical; }

/* ===== Footer ===== */
.footer{
  background:#3f3f3f;
  color:#d7d7d7;
  padding:26px 0;
  margin-top:40px;
}
.footer a{ color:#d7d7d7; text-decoration:none; }
.footer a:hover{ text-decoration:underline; }
.footer .links{ display:flex; gap:16px; flex-wrap:wrap; justify-content:center; font-size:12px; }
.footer .copy{ text-align:center; font-size:12px; margin-top:10px; opacity:.9; }

/* ===== Helpers ===== */
.note{ font-size:12px; color:var(--muted); line-height:1.7; }
.placeholder{
  background:#fff7ed;
  border:1px dashed #fdba74;
  padding:12px 14px;
  border-radius:12px;
  color:#7c2d12;
  font-size:12px;
  line-height:1.7;
}
/* === 修复手机端导航展开问题 === */
@media (max-width: 959px) {
  /* 汉堡按钮固定在右上角 */
  .nav-toggle {
    display:inline-flex;
    flex-direction:column;
    justify-content:center;
    align-items:center;
    position:absolute;
    right:16px;
    top:20px;
    background:#fff;
    border:1px solid #ddd;
    border-radius:6px;
    padding:8px;
    z-index:1000;
  }
  .nav-toggle span {
    width:22px;
    height:2px;
    background:#000;
    margin:4px 0;
    transition:0.3s;
  }

  /* 展开时三条横线变叉叉 */
  .menu.open + .nav-toggle span:nth-child(1) {
    transform:rotate(45deg) translate(5px,5px);
  }
  .menu.open + .nav-toggle span:nth-child(2) {
    opacity:0;
  }
  .menu.open + .nav-toggle span:nth-child(3) {
    transform:rotate(-45deg) translate(5px,-5px);
  }

  /* 移动端导航菜单 */
  .main-nav {
    position:relative;
  }
  .menu {
    display:none;
    flex-direction:column;
    background:var(--blue);
    width:100%;
    border-top:1px solid rgba(255,255,255,0.2);
    text-align:left;
  }
  .menu.open {
    display:flex !important;
  }

  .menu-item {
    border-bottom:1px solid rgba(255,255,255,0.15);
  }

  .menu-link {
    display:block;
    padding:12px 18px;
    height:auto;
    font-size:16px;
    text-align:left;
  }

  /* 下拉子菜单 */
  .submenu {
    display:none;
    flex-direction:column;
    background:#f9f9f9;
    padding:0;
  }
  .has-sub.open .submenu {
    display:flex;
  }
  .submenu a {
    color:#000;
    padding:10px 18px;
    font-size:15px;
  }
}

@media (max-width: 959px) {
  /* 汉堡按钮本体 */
  .nav-toggle{
    background: var(--blue, #1f6fbf) !important;
    border: 1px solid rgba(255,255,255,.35) !important;
    border-radius: 8px;
    padding: 10px;
    z-index: 9999;
  }

  /* ✅ 如果你用的是 span 三条线 */
  .nav-toggle span{
    display: block !important;
    width: 24px !important;
    height: 2px !important;
    margin: 5px 0 !important;
    background-color: #fff !important; /* 用 background-color 更稳 */
    border-radius: 2px;
    opacity: 1 !important;
  }

  /* ✅ 如果你用的是 svg 图标（很多模板是这样） */
  .nav-toggle svg,
  .nav-toggle svg *{
    fill: #fff !important;
    stroke: #fff !important;
  }
}
/* ======== 修复：移动端汉堡按钮线条不显示 ======== */
@media (max-width: 959px) {
  .nav-toggle {
    position: absolute;
    right: 16px;
    top: 20px;
    z-index: 2000;
    background-color: var(--blue, #1f6fbf);
    border: 1px solid rgba(255,255,255,0.3);
    border-radius: 6px;
    padding: 10px;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
  }

  .nav-toggle span {
    display: block !important;
    width: 24px !important;
    height: 3px !important;
    margin: 4px 0 !important;
    background-color: #ffffff !important;
    border-radius: 2px;
    opacity: 1 !important;
    transition: transform 0.3s ease, opacity 0.3s ease;
  }
 .nav-toggle{height:58px}
  /* 点击展开时的动画（可选） */
  .menu.open + .nav-toggle span:nth-child(1) {
    transform: rotate(45deg) translate(5px, 5px);
  }
  .menu.open + .nav-toggle span:nth-child(2) {
    opacity: 0;
  }
  .menu.open + .nav-toggle span:nth-child(3) {
    transform: rotate(-45deg) translate(5px, -5px);
  }
 
}