/* dsp.css - 电商数电开票系统（税航票帮手）介绍页
   配色适配 dcos 蓝 #007FFF + 柠檬黄 CTA，与全站品牌统一 */
body { overflow-x: hidden; }

/* ===== Hero ===== */
.dsp-hero {
  background: linear-gradient(135deg, #065FD4 0%, #0A8DFF 55%, #2AA6ED 100%);
  padding: 88px 0 0;
  color: #fff;
  text-align: center;
  position: relative;
  overflow: hidden;
}
.dsp-hero::after {
  content: "";
  position: absolute;
  right: -120px; top: -120px;
  width: 440px; height: 440px;
  border-radius: 50%;
  background: rgba(255,255,255,.07);
}
.dsp-hero::before {
  content: "";
  position: absolute;
  left: -110px; bottom: -150px;
  width: 400px; height: 400px;
  border-radius: 50%;
  background: rgba(255,255,255,.06);
}
.dsp-wrap { max-width: 1200px; margin: 0 auto; padding: 0 24px; position: relative; z-index: 1; }
.dsp-hero h1 { font-size: 46px; font-weight: 800; margin: 0 0 12px; letter-spacing: 2px; }
.dsp-hero .en { font-size: 15px; letter-spacing: 6px; color: rgba(255,255,255,.75); margin-bottom: 18px; text-transform: uppercase; }
.dsp-hero .sub { font-size: 17px; line-height: 1.9; color: rgba(255,255,255,.92); max-width: 860px; margin: 0 auto 24px; }
.dsp-hero .tags { display: flex; flex-wrap: wrap; gap: 12px; justify-content: center; }
.dsp-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);
}
.dsp-hero .btns { display: flex; flex-wrap: wrap; gap: 16px; justify-content: center; margin-top: 34px; }
.dsp-btn {
  display: inline-block; padding: 14px 46px; border-radius: 999px;
  font-size: 17px; font-weight: 700; transition: all .3s ease;
}
.dsp-btn-solid { background: #F7E02C; color: #0A2F6C; box-shadow: 0 6px 20px rgba(0,0,0,.18); }
.dsp-btn-solid:hover { transform: translateY(-3px); box-shadow: 0 10px 28px rgba(0,0,0,.26); color: #0A2F6C; }
.dsp-btn-ghost { border: 1px solid rgba(255,255,255,.75); color: #fff; }
.dsp-btn-ghost:hover { background: rgba(255,255,255,.14); color: #fff; }

/* ===== Hero 平台 logo 条 ===== */
.dsp-hero-plats {
  margin-top: 46px;
  background: rgba(255,255,255,.1);
  border-top: 1px solid rgba(255,255,255,.18);
  padding: 20px 0;
  backdrop-filter: blur(4px);
}
.dsp-hero-plats .dsp-wrap { display: flex; align-items: center; justify-content: center; gap: 12px; flex-wrap: wrap; }
.dsp-hero-plats .lab { font-size: 14px; color: rgba(255,255,255,.92); margin-right: 6px; }
.dsp-hero-plats .plat {
  display: inline-flex; align-items: center; justify-content: center;
  width: 56px; height: 56px; border-radius: 12px;
  background: #fff; padding: 9px;
  box-shadow: 0 3px 10px rgba(0,0,0,.14);
  transition: transform .25s ease;
}
.dsp-hero-plats .plat:hover { transform: translateY(-3px); }
.dsp-hero-plats img { height: 100%; width: auto; object-fit: contain; display: block; }

/* ===== 通用 section ===== */
.dsp-section { padding: 70px 0; }
.dsp-section.alt { background: #F7FAFF; }
.dsp-sec-title { text-align: center; font-size: 32px; font-weight: 700; color: #222; margin-bottom: 10px; }
.dsp-sec-sub { text-align: center; color: #888; font-size: 15px; margin-bottom: 44px; line-height: 1.8; }

/* ===== 网格与卡片 ===== */
.dsp-grid-4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }
.dsp-grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 26px; }
.dsp-grid-2 { display: grid; grid-template-columns: repeat(2, 1fr); gap: 26px; }
.dsp-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;
}
.dsp-card:hover { transform: translateY(-6px); box-shadow: 0 12px 30px rgba(0,127,255,.14); border-color: #2AA6ED; }
.dsp-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);
}
.dsp-card h3 { margin: 0 0 12px; font-size: 19px; font-weight: 600; color: #222; }
.dsp-card p { margin: 0; font-size: 14px; line-height: 1.9; color: #666; }

/* ===== 痛点卡（图片 + 图标） ===== */
.dsp-pain { text-align: center; padding: 26px 22px 30px; }
.dsp-pain .pic { height: 92px; display: flex; align-items: center; justify-content: center; margin-bottom: 6px; }
.dsp-pain .pic img { max-height: 88px; max-width: 100%; object-fit: contain; }
.dsp-pain h3 { font-size: 18px; color: #222; margin: 0 0 10px; font-weight: 700; position: relative; padding-bottom: 12px; }
.dsp-pain h3::after { content: ""; position: absolute; left: 50%; bottom: 0; transform: translateX(-50%); width: 26px; height: 3px; border-radius: 2px; background: linear-gradient(90deg, #2AA6ED, #007FFF); }
.dsp-pain p { font-size: 13.5px; line-height: 1.85; color: #777; margin: 0; }

/* ===== 合规警示条 ===== */
.dsp-warn {
  background: linear-gradient(90deg, #0A2F6C 0%, #0D3E8C 100%);
  padding: 34px 0; color: #fff; text-align: center;
}
.dsp-warn .dsp-wrap { max-width: 1000px; }
.dsp-warn .t { font-size: 22px; font-weight: 700; margin-bottom: 10px; }
.dsp-warn .t i { color: #F7E02C; margin-right: 10px; }
.dsp-warn .s { font-size: 14.5px; color: rgba(255,255,255,.85); line-height: 1.9; margin-bottom: 20px; }
.dsp-warn .go {
  display: inline-block; padding: 11px 34px; border-radius: 999px;
  background: #F7E02C; color: #0A2F6C; font-size: 15px; font-weight: 700;
  transition: all .3s ease;
}
.dsp-warn .go:hover { transform: translateY(-2px); box-shadow: 0 8px 20px rgba(247,224,44,.35); color: #0A2F6C; }

/* ===== 方案总览（左右图文） ===== */
.dsp-intro { display: grid; grid-template-columns: 1.05fr 1fr; gap: 44px; align-items: center; }
.dsp-intro .l p { color: #555; line-height: 2; font-size: 15px; margin: 0 0 16px; }
.dsp-intro .l .point { display: flex; align-items: flex-start; gap: 10px; margin-bottom: 12px; font-size: 15px; color: #444; line-height: 1.7; }
.dsp-intro .l .point i { color: #007FFF; margin-top: 4px; }
.dsp-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);
}
.dsp-intro .r h3 { margin: 0 0 18px; font-size: 21px; font-weight: 600; }
.dsp-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; }
.dsp-intro .r li:last-child { border-bottom: none; }
.dsp-intro .r li i { color: #BEE3FF; }

/* ===== 平台聚合徽章 ===== */
.dsp-plats { display: flex; flex-wrap: wrap; gap: 12px; justify-content: center; margin-bottom: 34px; }
.dsp-plats span {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 9px 22px; background: #fff; border: 1px solid #E4EEFB;
  border-radius: 999px; font-size: 14px; color: #2A3B55;
  box-shadow: 0 2px 10px rgba(0,127,255,.06);
  transition: .25s;
}
.dsp-plats span:hover { border-color: #007FFF; color: #007FFF; transform: translateY(-2px); }
.dsp-plats i { color: #007FFF; }
.dsp-stat {
  display: flex; flex-wrap: wrap; justify-content: center; gap: 12px;
  margin-bottom: 8px;
}
.dsp-stat div {
  padding: 18px 44px; text-align: center;
  border-left: 1px solid #DCE6F5; font-size: 14px; color: #7A869C;
}
.dsp-stat div:first-child { border-left: none; }
.dsp-stat b { display: block; font-size: 38px; font-weight: 800; color: #0A2F6C; line-height: 1.2; margin-bottom: 6px; }

/* ===== 国补场景（整版横幅背景 + tab 切换） ===== */
.dsp-section.gb-sec {
  background: #EAF1FC;
}
.dsp-gb-tab { display: grid; grid-template-columns: 250px 1fr; gap: 30px; align-items: start; }
.gb-tabs { display: flex; flex-direction: column; gap: 10px; }
.gb-tab {
  display: flex; align-items: center; gap: 10px; width: 100%; text-align: left;
  padding: 15px 18px; border-radius: 10px; cursor: pointer;
  background: rgba(255,255,255,.82); border: 1px solid #DCE8F8; color: #2B3A52;
  font-size: 15px; font-weight: 600; transition: all .25s;
}
.gb-tab i { color: #007FFF; font-size: 17px; }
.gb-tab:hover { border-color: #007FFF; }
.gb-tab.active {
  background: #007FFF; color: #fff; border-color: #007FFF;
  box-shadow: 0 6px 18px rgba(0,127,255,.25);
}
.gb-tab.active i { color: #fff; }
.gb-panels { position: relative; min-height: 240px; }
.gb-panel { display: none; }
.gb-panel.active { display: grid; grid-template-columns: 1fr 320px; gap: 34px; align-items: center; }
.gb-panel h3 { font-size: 24px; font-weight: 700; color: #0A2F6C; margin: 0 0 12px; }
.gb-panel .gb-desc { font-size: 15px; line-height: 2; color: #44536B; margin: 0 0 18px; }
.gb-panel ul { list-style: none; padding: 0; margin: 0; }
.gb-panel li { padding: 7px 0 7px 26px; position: relative; font-size: 14px; color: #2B3A52; line-height: 1.7; }
.gb-panel li::before {
  content: "\f00c"; font-family: "Font Awesome 5 Pro"; font-weight: 900;
  position: absolute; left: 0; top: 8px; color: #007FFF; font-size: 13px;
}
.gb-pic {
  height: 210px; border-radius: 14px; border: 2px dashed #B9CFEE;
  background: rgba(255,255,255,.65);
  display: flex; align-items: center; justify-content: center;
  color: #8FA6C8; font-size: 13px; letter-spacing: 1px;
}

/* ===== 场景对照 ===== */
.dsp-vs { display: grid; grid-template-columns: repeat(3, 1fr); gap: 26px; }
.dsp-vs-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;
}
.dsp-vs-card:hover { transform: translateY(-6px); box-shadow: 0 12px 30px rgba(0,127,255,.14); }
.dsp-vs-card .tag {
  display: inline-block; padding: 3px 14px; border-radius: 20px;
  font-size: 13px; color: #007FFF; background: #F0F7FF; margin-bottom: 14px;
}
.dsp-vs-card h3 { margin: 0 0 16px; font-size: 19px; font-weight: 700; color: #222; }
.dsp-vs-card .before, .dsp-vs-card .after { display: flex; gap: 12px; align-items: flex-start; }
.dsp-vs-card .before { margin-bottom: 14px; }
.dsp-vs-card .before .ic { flex: none; width: 34px; height: 34px; border-radius: 8px; background: #F1F3F7; color: #98A3B5; display: flex; align-items: center; justify-content: center; font-size: 15px; }
.dsp-vs-card .after .ic { flex: none; width: 34px; height: 34px; border-radius: 8px; background: linear-gradient(135deg, #2AA6ED, #007FFF); color: #fff; display: flex; align-items: center; justify-content: center; font-size: 15px; }
.dsp-vs-card p { margin: 0; font-size: 13.5px; line-height: 1.8; color: #666; }
.dsp-vs-card .before p { color: #9AA3B5; }

/* ===== 能力矩阵（图片图标卡） ===== */
.dsp-ability { text-align: left; }
.dsp-ability .pic { height: 54px; display: flex; align-items: center; margin-bottom: 14px; }
.dsp-ability .pic img { max-height: 50px; max-width: 100%; object-fit: contain; }
.dsp-ability h3 { margin: 0 0 8px; font-size: 18px; font-weight: 700; color: #222; }
.dsp-ability p { font-size: 13.5px; line-height: 1.8; color: #777; margin: 0; }

/* ===== 客户案例 ===== */
.dsp-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;
}
.dsp-case-item:hover { transform: translateY(-4px); box-shadow: 0 10px 26px rgba(0,127,255,.12); }
.dsp-case-item .head { display: flex; align-items: center; gap: 14px; margin-bottom: 14px; }
.dsp-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;
}
.dsp-case-item h3 { margin: 0; font-size: 18px; font-weight: 600; color: #222; }
.dsp-case-item .ind { font-size: 13px; color: #007FFF; }
.dsp-case-item ul { margin: 0; padding: 0; list-style: none; }
.dsp-case-item li { position: relative; padding: 6px 0 6px 20px; font-size: 14px; line-height: 1.75; color: #666; }
.dsp-case-item li::before { content: ""; position: absolute; left: 2px; top: 15px; width: 6px; height: 6px; border-radius: 50%; background: #007FFF; }
.dsp-case-item .data { display: flex; flex-wrap: wrap; gap: 26px; margin-top: 14px; padding-top: 16px; border-top: 1px dashed #E4EEFB; }
.dsp-case-item .data div { text-align: center; }
.dsp-case-item .data b { display: block; font-size: 26px; font-weight: 800; color: #007FFF; line-height: 1.2; }
.dsp-case-item .data span { font-size: 12.5px; color: #98A3B5; }

/* ===== 用户评价 ===== */
.dsp-quotes { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; margin-top: 40px; }
.dsp-quote {
  background: #fff; border: 1px solid #EAF3FF; border-radius: 14px;
  padding: 26px 26px 22px; box-shadow: 0 4px 18px rgba(0,127,255,.06);
}
.dsp-quote .q { font-size: 14px; line-height: 1.95; color: #555; margin: 0 0 16px; }
.dsp-quote .q i { color: #007FFF; opacity: .45; margin-right: 4px; }
.dsp-quote .who { display: flex; align-items: center; gap: 12px; }
.dsp-quote .who img { width: 40px; height: 40px; border-radius: 50%; object-fit: cover; }
.dsp-quote .who .nm { font-size: 13.5px; color: #222; font-weight: 600; }
.dsp-quote .who .co { font-size: 12px; color: #98A3B5; }

/* ===== 公司实力徽章 ===== */
.dsp-cap { display: flex; flex-wrap: wrap; gap: 16px; justify-content: center; margin-bottom: 8px; }
.dsp-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);
}
.dsp-cap i { color: #007FFF; }

/* ===== FAQ ===== */
.dsp-faq { max-width: 900px; margin: 0 auto; }
.dsp-faq-item {
  background: #fff; border: 1px solid #EAF3FF; border-radius: 12px;
  margin-bottom: 14px; overflow: hidden;
  box-shadow: 0 2px 10px rgba(0,127,255,.05);
}
.dsp-faq-item summary {
  cursor: pointer; list-style: none; padding: 18px 24px;
  font-size: 15.5px; font-weight: 600; color: #222;
  display: flex; align-items: center; justify-content: space-between; gap: 14px;
}
.dsp-faq-item summary::-webkit-details-marker { display: none; }
.dsp-faq-item summary::after {
  content: "\f078"; font-family: "Font Awesome 5 Pro"; font-weight: 300;
  color: #007FFF; transition: transform .25s ease; flex: none;
}
.dsp-faq-item[open] summary::after { transform: rotate(180deg); }
.dsp-faq-item .ans { padding: 0 24px 18px; font-size: 14px; line-height: 1.95; color: #666; }

/* ===== 数据来源脚注 ===== */
.dsp-note { text-align: center; font-size: 12px; color: #A9B2C3; margin-top: 26px; line-height: 1.8; }

/* ===== 响应式 ===== */
@media screen and (max-width: 992px) {
  .dsp-grid-4 { grid-template-columns: 1fr 1fr; }
  .dsp-grid-3 { grid-template-columns: 1fr 1fr; }
  .dsp-grid-2, .dsp-vs { grid-template-columns: 1fr; }
  .dsp-intro, .dsp-gb-tab { grid-template-columns: 1fr; }
  .dsp-hero h1 { font-size: 34px; }
  .dsp-quotes { grid-template-columns: 1fr; }
}
@media screen and (max-width: 600px) {
  .dsp-grid-4, .dsp-grid-3 { grid-template-columns: 1fr; }
  .dsp-hero { padding-top: 64px; }
  .dsp-hero h1 { font-size: 27px; }
  .dsp-sec-title { font-size: 25px; }
  .dsp-section { padding: 52px 0; }
  .dsp-stat div { padding: 12px 22px; }
  .dsp-stat b { font-size: 30px; }
  .gb-panels { min-height: 0; }
  .gb-panel.active { grid-template-columns: 1fr; gap: 20px; }
  .gb-pic { height: 170px; }
  .gb-tab { padding: 12px 14px; font-size: 14px; }
  .gb-panel h3 { font-size: 20px; }
}