/* nst.css - 诺税通税务平台介绍页（配色适配 dcos 蓝 #007FFF，航税云） */
body { overflow-x: hidden; }

/* ===== Hero ===== */
.nst-hero {
  background: linear-gradient(135deg, #065FD4 0%, #0A8DFF 55%, #2AA6ED 100%);
  padding: 92px 0 84px;
  color: #fff;
  text-align: center;
  position: relative;
  overflow: hidden;
}
.nst-hero::after {
  content: "";
  position: absolute;
  right: -120px;
  top: -120px;
  width: 420px;
  height: 420px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.07);
}
.nst-hero::before {
  content: "";
  position: absolute;
  left: -100px;
  bottom: -140px;
  width: 380px;
  height: 380px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.06);
}
.nst-wrap { max-width: 1200px; margin: 0 auto; padding: 0 24px; position: relative; z-index: 1; }
.nst-hero h1 { font-size: 44px; font-weight: 700; margin: 0 0 10px; letter-spacing: 1px; }
.nst-hero .en { font-size: 15px; letter-spacing: 6px; color: rgba(255,255,255,.75); margin-bottom: 18px; text-transform: uppercase; }
.nst-hero .sub { font-size: 17px; line-height: 1.9; color: rgba(255,255,255,.92); max-width: 880px; margin: 0 auto 22px; }
.nst-hero .tags { display: flex; flex-wrap: wrap; gap: 12px; justify-content: center; }
.nst-hero .tags span {
  display: inline-block;
  padding: 6px 18px;
  border-radius: 999px;
  font-size: 14px;
  color: #fff;
  background: rgba(255,255,255,.16);
  border: 1px solid rgba(255,255,255,.35);
}
.nst-hero .btns { display: flex; flex-wrap: wrap; gap: 16px; justify-content: center; margin-top: 34px; }
.nst-btn {
  display: inline-block;
  padding: 14px 46px;
  border-radius: 999px;
  font-size: 17px;
  font-weight: 600;
  transition: all .3s ease;
}
.nst-btn-solid { background: #fff; color: #0A8DFF; box-shadow: 0 6px 20px rgba(0,0,0,.15); }
.nst-btn-solid:hover { transform: translateY(-3px); box-shadow: 0 10px 26px rgba(0,0,0,.22); color: #0A8DFF; }
.nst-btn-ghost { border: 1px solid rgba(255,255,255,.75); color: #fff; }
.nst-btn-ghost:hover { background: rgba(255,255,255,.14); color: #fff; }

/* ===== 通用 section ===== */
.nst-section { padding: 70px 0; }
.nst-section.alt { background: #F7FAFF; }
.nst-section.deep { background: linear-gradient(180deg, #F7FAFF 0%, #fff 100%); }
.nst-sec-title { text-align: center; font-size: 32px; font-weight: 700; color: #222; margin-bottom: 10px; }
.nst-sec-sub { text-align: center; color: #888; font-size: 15px; margin-bottom: 44px; line-height: 1.8; }

/* ===== 网格与卡片 ===== */
.nst-grid-4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }
.nst-grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 26px; }
.nst-grid-2 { display: grid; grid-template-columns: repeat(2, 1fr); gap: 26px; }
.nst-card {
  background: #fff;
  border: 1px solid #EAF3FF;
  border-radius: 14px;
  padding: 30px 26px;
  box-shadow: 0 4px 18px rgba(0,127,255,.06);
  transition: .3s;
}
.nst-card:hover { transform: translateY(-6px); box-shadow: 0 12px 30px rgba(0,127,255,.14); border-color: #2AA6ED; }
.nst-card .ico {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 52px;
  height: 52px;
  border-radius: 12px;
  background: linear-gradient(135deg, #2AA6ED, #007FFF);
  color: #fff;
  font-size: 22px;
  margin-bottom: 18px;
  box-shadow: 0 4px 12px rgba(0,127,255,.18);
}
.nst-card h3 { margin: 0 0 12px; font-size: 19px; font-weight: 600; color: #222; }
.nst-card p { margin: 0; font-size: 14px; line-height: 1.9; color: #666; }

/* 挑战卡片（白底浅蓝图标） */
.nst-pain { text-align: center; }
.nst-pain .ico {
  width: 60px;
  height: 60px;
  margin: 0 auto 18px;
  border-radius: 50%;
  background: #F0F7FF;
  color: #007FFF;
  font-size: 26px;
  display: flex;
  align-items: center;
  justify-content: center;
}
.nst-pain h3 { font-size: 18px; color: #222; margin: 0 0 10px; font-weight: 600; }
.nst-pain p { font-size: 14px; line-height: 1.85; color: #777; margin: 0; }

/* ===== 平台介绍（左右图文） ===== */
.nst-intro { display: grid; grid-template-columns: 1.15fr 1fr; gap: 44px; align-items: center; }
.nst-intro .l p { color: #555; line-height: 2; font-size: 15px; margin: 0 0 16px; }
.nst-intro .l .point { display: flex; align-items: flex-start; gap: 10px; margin-bottom: 12px; font-size: 15px; color: #444; line-height: 1.7; }
.nst-intro .l .point i { color: #007FFF; margin-top: 4px; }
.nst-intro .r {
  background: linear-gradient(160deg, #0A8DFF, #065FD4);
  border-radius: 16px;
  padding: 34px 30px;
  color: #fff;
  box-shadow: 0 12px 34px rgba(0,127,255,.28);
}
.nst-intro .r h3 { margin: 0 0 18px; font-size: 21px; font-weight: 600; }
.nst-intro .r li { display: flex; align-items: center; gap: 10px; padding: 10px 0; border-bottom: 1px dashed rgba(255,255,255,.25); font-size: 14px; line-height: 1.6; }
.nst-intro .r li:last-child { border-bottom: none; }
.nst-intro .r li i { color: #BEE3FF; }

/* ===== 表格 ===== */
.nst-table { width: 100%; border-collapse: collapse; background: #fff; border-radius: 12px; overflow: hidden; box-shadow: 0 4px 18px rgba(0,127,255,.06); }
.nst-table th { background: #007FFF; color: #fff; padding: 14px 18px; text-align: left; font-size: 15px; font-weight: 600; }
.nst-table td { padding: 14px 18px; border-bottom: 1px solid #F0F4FB; font-size: 14px; color: #555; line-height: 1.75; }
.nst-table tr:nth-child(even) td { background: #FAFCFF; }
.nst-table .k { color: #222; font-weight: 600; white-space: nowrap; }

/* ===== 部署模式 ===== */
.nst-mode { text-align: center; }
.nst-mode .ico {
  width: 64px; height: 64px;
  margin: 0 auto 18px;
  border-radius: 16px;
  background: linear-gradient(135deg, #2AA6ED, #007FFF);
  color: #fff; font-size: 26px;
  display: flex; align-items: center; justify-content: center;
  box-shadow: 0 6px 16px rgba(0,127,255,.2);
}
.nst-mode h3 { font-size: 19px; color: #222; margin: 0 0 10px; font-weight: 600; }
.nst-mode p { font-size: 14px; line-height: 1.85; color: #777; margin: 0; }

/* ===== 标签 ===== */
.nst-tag {
  display: inline-block;
  padding: 3px 14px;
  border-radius: 20px;
  font-size: 13px;
  color: #007FFF;
  background: #F0F7FF;
  margin-bottom: 12px;
}

/* ===== 客户案例 ===== */
.nst-case-item {
  background: #fff;
  border: 1px solid #EAF3FF;
  border-radius: 14px;
  padding: 28px 30px;
  box-shadow: 0 4px 18px rgba(0,127,255,.06);
  transition: .3s;
}
.nst-case-item:hover { transform: translateY(-4px); box-shadow: 0 10px 26px rgba(0,127,255,.12); }
.nst-case-item .head { display: flex; align-items: center; gap: 14px; margin-bottom: 14px; }
.nst-case-item .head .logo {
  width: 46px; height: 46px;
  border-radius: 10px;
  background: linear-gradient(135deg, #2AA6ED, #007FFF);
  color: #fff;
  font-size: 17px;
  font-weight: 700;
  display: flex; align-items: center; justify-content: center;
}
.nst-case-item h3 { margin: 0; font-size: 18px; font-weight: 600; color: #222; }
.nst-case-item .ind { font-size: 13px; color: #007FFF; }
.nst-case-item ul { margin: 0; padding: 0; list-style: none; }
.nst-case-item li { position: relative; padding: 6px 0 6px 20px; font-size: 14px; line-height: 1.75; color: #666; }
.nst-case-item li::before { content: ""; position: absolute; left: 2px; top: 15px; width: 6px; height: 6px; border-radius: 50%; background: #007FFF; }

/* ===== 能力条 ===== */
.nst-cap { display: flex; flex-wrap: wrap; gap: 16px; justify-content: center; margin-bottom: 8px; }
.nst-cap span {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 22px;
  background: #fff;
  border: 1px solid #EAF3FF;
  border-radius: 999px;
  font-size: 14px;
  color: #333;
  box-shadow: 0 2px 10px rgba(0,127,255,.06);
}
.nst-cap i { color: #007FFF; }

/* ===== 风险模型 ===== */
.nst-model { text-align: left; }
.nst-model .cat { display: flex; align-items: center; gap: 10px; margin-bottom: 16px; }
.nst-model .cat .b { width: 8px; height: 22px; border-radius: 4px; background: linear-gradient(180deg, #2AA6ED, #007FFF); }
.nst-model .cat h4 { margin: 0; font-size: 17px; font-weight: 600; color: #222; }
.nst-model .items { display: flex; flex-wrap: wrap; gap: 8px; }
.nst-model .items span {
  padding: 5px 14px;
  background: #F0F7FF;
  border-radius: 999px;
  font-size: 13px;
  color: #3A6EA5;
}

/* ===== CTA ===== */
.nst-callout {
  background: linear-gradient(135deg, #0A8DFF 0%, #2AA6ED 100%);
  border-radius: 18px;
  padding: 52px 40px;
  text-align: center;
  color: #fff;
  box-shadow: 0 14px 40px rgba(0,127,255,.3);
}
.nst-callout h3 { margin: 0 0 12px; font-size: 26px; font-weight: 700; }
.nst-callout p { margin: 0 0 28px; font-size: 15px; color: rgba(255,255,255,.9); line-height: 1.8; }
.nst-callout .btns { display: flex; flex-wrap: wrap; gap: 16px; justify-content: center; }

/* ===== 响应式 ===== */
@media screen and (max-width: 992px) {
  .nst-grid-4 { grid-template-columns: 1fr 1fr; }
  .nst-grid-3 { grid-template-columns: 1fr 1fr; }
  .nst-grid-2, .nst-case { grid-template-columns: 1fr; }
  .nst-intro { grid-template-columns: 1fr; }
  .nst-hero h1 { font-size: 34px; }
}
@media screen and (max-width: 600px) {
  .nst-grid-4, .nst-grid-3 { grid-template-columns: 1fr; }
  .nst-hero { padding: 64px 0; }
  .nst-hero h1 { font-size: 27px; }
  .nst-sec-title { font-size: 25px; }
  .nst-section { padding: 52px 0; }
  .nst-table { display: block; overflow-x: auto; white-space: nowrap; }
  .nst-callout { padding: 38px 22px; }
}