/* 营销首页 · 落地页平台自研设计（湖蓝 / 石墨 / 晨光） */
:root {
  --blue: #1f6feb;
  --blue-deep: #1857c9;
  --ink: #1c2433;
  --muted: #667085;
  --line: #e2e8f0;
  --bg: #ffffff;
  --bg-soft: #f5f8fc;
  --blue-tint: #edf4ff;
  --green: #0e9f6e;
  --amber: #cf7a09;
  font-family: "Segoe UI Variable Text", "Segoe UI", -apple-system, "PingFang SC", "Microsoft YaHei UI", "Microsoft YaHei", system-ui, sans-serif;
}

* { box-sizing: border-box; margin: 0; padding: 0 }
html { scroll-behavior: smooth }
body { background: var(--bg); color: var(--ink); line-height: 1.7; -webkit-font-smoothing: antialiased }
a { color: inherit }
img, svg { display: block }
.skip-link {
  position: absolute; left: 12px; top: -48px; z-index: 99;
  background: var(--blue); color: #fff; padding: 9px 16px; border-radius: 8px;
  font-size: 13px; text-decoration: none; transition: top .2s;
}
.skip-link:focus { top: 12px }

/* —— 顶栏 —— */
.topbar {
  position: sticky; top: 0; z-index: 40;
  display: flex; align-items: center; gap: 26px;
  height: 66px; padding: 0 clamp(18px, 4vw, 44px);
  background: #ffffffd9; backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--line);
}
.brand { display: flex; align-items: center; gap: 11px; text-decoration: none }
.brand-mark {
  display: grid; place-items: center; width: 36px; height: 36px;
  border-radius: 10px; background: linear-gradient(135deg, #1f6feb, #1857c9);
  color: #fff; font-weight: 700; font-size: 17px; box-shadow: 0 6px 14px #1f6feb33;
}
.brand-copy b { font-size: 15px; letter-spacing: .5px; display: block }
.brand-copy small { display: block; font-size: 10px; color: var(--muted); margin-top: 1px }
.topbar nav { display: flex; gap: 4px; margin-left: auto }
.topbar nav a {
  text-decoration: none; font-size: 13px; color: #3a465a;
  padding: 8px 13px; border-radius: 8px; transition: background .15s, color .15s;
}
.topbar nav a:hover { background: var(--bg-soft); color: var(--blue) }

/* —— 按钮 —— */
.button {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  height: 44px; padding: 0 22px; border-radius: 9px;
  background: linear-gradient(135deg, #1f6feb, #1857c9); color: #fff;
  font-size: 14px; font-weight: 600; text-decoration: none; letter-spacing: .5px;
  box-shadow: 0 10px 22px #1f6feb33; transition: filter .15s, transform .15s;
}
.button:hover { filter: brightness(1.07) }
.button:active { transform: translateY(1px) }
.button-small { height: 38px; padding: 0 16px; font-size: 13px }
.button-secondary {
  background: #fff; color: var(--ink); border: 1px solid var(--line); box-shadow: none;
}
.button-secondary:hover { border-color: #9db9ef; color: var(--blue); filter: none }
.button-light { background: #fff; color: var(--blue-deep); box-shadow: 0 10px 24px #0006 }

/* —— Hero —— */
.hero {
  display: grid; grid-template-columns: 1.05fr 1fr; gap: clamp(28px, 5vw, 64px);
  align-items: center; padding: clamp(48px, 7vw, 88px) clamp(18px, 5vw, 56px) clamp(40px, 6vw, 72px);
  background:
    radial-gradient(900px 420px at 85% -10%, #dbeafe 0%, transparent 60%),
    radial-gradient(700px 380px at -10% 30%, #eef4ff 0%, transparent 55%),
    var(--bg);
}
.eyebrow {
  display: inline-flex; align-items: center; gap: 9px;
  font-size: 11px; font-weight: 600; letter-spacing: 2.5px; color: var(--blue);
  background: var(--blue-tint); border: 1px solid #d4e5ff; border-radius: 999px; padding: 7px 14px;
}
.eyebrow span { width: 7px; height: 7px; border-radius: 50%; background: var(--blue); box-shadow: 0 0 0 4px #1f6feb22 }
.hero h1 {
  margin: 22px 0 18px; font-size: clamp(30px, 4.4vw, 46px);
  line-height: 1.28; font-weight: 700; letter-spacing: .3px;
}
.hero h1 em { font-style: normal; color: var(--blue) }
.hero-lead { color: var(--muted); font-size: 15px; max-width: 52ch }
.hero-actions { display: flex; gap: 13px; flex-wrap: wrap; margin-top: 30px }
.assurance-list { list-style: none; display: flex; gap: 9px; flex-wrap: wrap; margin-top: 26px }
.assurance-list li {
  font-size: 12px; color: #3a465a; background: #fff;
  border: 1px solid var(--line); border-radius: 999px; padding: 7px 13px;
}
.assurance-list li::before { content: "✓"; color: var(--green); font-weight: 700; margin-right: 7px }

/* —— 产品窗口示意 —— */
.product-window {
  border: 1px solid var(--line); border-radius: 16px; background: #fff;
  box-shadow: 0 24px 60px #1c24331f; overflow: hidden;
}
.window-bar {
  display: flex; align-items: center; gap: 12px; height: 42px; padding: 0 15px;
  background: #f8fafc; border-bottom: 1px solid var(--line);
  font-size: 11px; color: var(--muted);
}
.window-dots { display: flex; gap: 6px }
.window-dots i { width: 10px; height: 10px; border-radius: 50%; background: #d7dde7 }
.window-dots i:first-child { background: #f3b6b6 }
.window-dots i:nth-child(2) { background: #f3dcb2 }
.window-dots i:last-child { background: #b9e3c4 }
.window-bar b { font-weight: 600 }
.window-secure { margin-left: auto; display: flex; align-items: center; gap: 6px; color: var(--green) }
.window-secure i { width: 7px; height: 7px; border-radius: 50%; background: var(--green) }
.window-body { display: grid; grid-template-columns: 132px 1fr; min-height: 330px }
.demo-sidebar { background: #10141b; padding: 16px 10px; display: flex; flex-direction: column; gap: 4px }
.demo-sidebar b {
  color: #fff; font-size: 12px; letter-spacing: 1px; padding: 6px 10px 14px;
}
.demo-sidebar span { color: #8b95a6; font-size: 11px; padding: 7px 10px; border-radius: 7px }
.demo-sidebar span.active { color: #a9c7ff; background: #16233f }
.demo-main { padding: 20px 22px; display: flex; flex-direction: column; gap: 16px }
.demo-heading { display: flex; align-items: center; justify-content: space-between; gap: 12px }
.demo-heading small { display: block; font-size: 10px; color: var(--muted); letter-spacing: 1.5px }
.demo-heading strong { font-size: 16px; letter-spacing: .3px }
.demo-heading > span {
  font-size: 11px; color: var(--green); background: #e7f7f0;
  border-radius: 999px; padding: 5px 11px;
}
.status-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 10px }
.status-grid article {
  border: 1px solid var(--line); border-radius: 11px; padding: 12px;
  display: flex; gap: 10px; align-items: flex-start; background: #fbfcfe;
}
.status-icon {
  display: grid; place-items: center; min-width: 30px; height: 30px;
  border-radius: 8px; font-size: 11px; font-weight: 700;
}
.status-icon.page { background: var(--blue-tint); color: var(--blue) }
.status-icon.domain { background: #e7f7f0; color: var(--green) }
.status-icon.track { background: #fdf3e3; color: var(--amber) }
.status-grid small { display: block; font-size: 10px; color: var(--muted) }
.status-grid b { font-size: 12px }
.delivery-card { border: 1px solid var(--line); border-radius: 12px; padding: 15px 16px; margin-top: auto }
.delivery-card header { display: flex; justify-content: space-between; align-items: center; gap: 10px; margin-bottom: 13px }
.delivery-card header small { display: block; font-size: 10px; color: var(--muted) }
.delivery-card header b { font-size: 13px }
.tag { font-size: 10px; color: var(--blue); background: var(--blue-tint); border-radius: 999px; padding: 4px 10px }
.delivery-steps { display: flex; flex-wrap: wrap; gap: 7px }
.delivery-steps span {
  display: inline-flex; align-items: center; gap: 6px; font-size: 11px; color: var(--muted);
  border: 1px dashed var(--line); border-radius: 999px; padding: 5px 11px;
}
.delivery-steps span i {
  font-style: normal; display: grid; place-items: center; width: 16px; height: 16px;
  border-radius: 50%; background: #eef1f6; font-size: 9px;
}
.delivery-steps .done { color: var(--green); border-color: #bfe8d6; background: #f2fbf7 }
.delivery-steps .done i { background: var(--green); color: #fff }
.delivery-steps .current { color: var(--blue); border-color: #b8d2fa; background: var(--blue-tint); border-style: solid }
.delivery-steps .current i { background: var(--blue); color: #fff }
.delivery-detail { display: grid; grid-template-columns: repeat(3, 1fr); gap: 10px; margin-top: 13px }
.delivery-detail small { display: block; font-size: 10px; color: var(--muted) }
.delivery-detail b { font-size: 12px }

/* —— 价值条 —— */
.value-strip {
  display: grid; grid-template-columns: repeat(3, 1fr); gap: 1px;
  background: #16305c; padding: 26px clamp(18px, 5vw, 56px);
}
.value-strip article { background: #12294e; padding: 20px 24px; border-radius: 12px }
.value-strip b { display: block; color: #7fb0ff; font-size: 12px; letter-spacing: 2.5px; margin-bottom: 8px }
.value-strip span { color: #c6d5ec; font-size: 13px }

/* —— 通用小节 —— */
.section { padding: clamp(56px, 8vw, 96px) clamp(18px, 5vw, 56px) }
.section-heading { max-width: 640px; margin-bottom: 42px }
.section-heading.centered { margin-left: auto; margin-right: auto; text-align: center }
.section-label {
  display: inline-block; font-size: 11px; font-weight: 700; letter-spacing: 2.5px;
  color: var(--blue); background: var(--blue-tint); border-radius: 999px; padding: 6px 13px;
}
.section-heading h2 { font-size: clamp(24px, 3vw, 32px); line-height: 1.4; margin: 16px 0 12px; letter-spacing: .3px }
.section-heading h2::after {
  content: ""; display: block; width: 44px; height: 3px; border-radius: 2px;
  background: linear-gradient(90deg, #1f6feb, #1857c9); margin-top: 14px;
}
.section-heading.centered h2::after { margin-left: auto; margin-right: auto }
.section-heading > p { color: var(--muted); font-size: 14px }

/* —— 能力卡片 —— */
.feature-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px }
.feature-card {
  border: 1px solid var(--line); border-radius: 13px; background: #fff;
  padding: 24px 22px; transition: transform .2s, box-shadow .2s, border-color .2s;
}
.feature-card:hover { transform: translateY(-3px); box-shadow: 0 16px 36px #1c243317; border-color: #c4d8f8 }
.feature-icon {
  display: grid; place-items: center; width: 42px; height: 42px;
  border-radius: 11px; background: var(--blue-tint); color: var(--blue); margin-bottom: 16px;
}
.feature-icon svg { width: 21px; height: 21px; fill: none; stroke: currentColor; stroke-width: 1.7; stroke-linecap: round; stroke-linejoin: round }
.feature-card h3 { font-size: 15px; margin-bottom: 9px; letter-spacing: .3px }
.feature-card p { color: var(--muted); font-size: 13px }

/* —— 左右分栏小节 —— */
.split-section {
  display: grid; grid-template-columns: 1fr 1fr; gap: clamp(30px, 5vw, 70px); align-items: center;
}
.split-section.reverse .split-copy { order: 2 }
.check-list { list-style: none; margin-top: 22px; display: flex; flex-direction: column; gap: 11px }
.check-list li { font-size: 14px; color: #3a465a; padding-left: 30px; position: relative }
.check-list li::before {
  content: "✓"; position: absolute; left: 0; top: 1px;
  display: grid; place-items: center; width: 20px; height: 20px;
  border-radius: 50%; background: var(--blue-tint); color: var(--blue); font-size: 11px; font-weight: 700;
}
.domain-demo, .tracking-demo {
  border: 1px solid var(--line); border-radius: 14px; background: #fff;
  box-shadow: 0 18px 44px #1c243314; padding: 20px; display: flex; flex-direction: column; gap: 10px;
}
.demo-panel-head { display: flex; justify-content: space-between; align-items: center; gap: 12px; padding-bottom: 12px; border-bottom: 1px solid var(--line) }
.demo-panel-head small { display: block; font-size: 10px; color: var(--muted); letter-spacing: 1.5px }
.demo-panel-head b { font-size: 14px }
.demo-panel-head > span { font-size: 11px; color: var(--muted); border: 1px solid var(--line); border-radius: 999px; padding: 4px 11px }
.domain-row { display: flex; align-items: center; gap: 12px; border: 1px solid var(--line); border-radius: 11px; padding: 13px 14px }
.domain-row .type { font-size: 10px; font-weight: 700; border-radius: 6px; padding: 4px 8px; flex: none }
.domain-row .type.fixed { background: var(--blue-tint); color: var(--blue) }
.domain-row .type.wildcard { background: #f0edfc; color: #6d5bd0 }
.domain-row > div { min-width: 0; flex: 1 }
.domain-row b { display: block; font-size: 13px; font-family: Consolas, monospace; overflow-wrap: anywhere }
.domain-row small { display: block; font-size: 11px; color: var(--muted) }
.domain-row em { font-style: normal; font-size: 11px; flex: none }
.domain-row em.ready { color: var(--green); background: #e7f7f0; border-radius: 999px; padding: 4px 10px }
.domain-row em.waiting { color: var(--amber); background: #fdf3e3; border-radius: 999px; padding: 4px 10px }
.provider-row { display: flex; align-items: center; gap: 12px; border: 1px solid var(--line); border-radius: 11px; padding: 13px 14px }
.provider-row.active { border-color: #b8d2fa; background: #f7faff }
.provider-mark {
  display: grid; place-items: center; width: 34px; height: 34px; border-radius: 9px;
  background: var(--blue-tint); color: var(--blue); font-size: 13px; font-weight: 700; flex: none;
}
.provider-mark.server { background: #e7f7f0; color: var(--green) }
.provider-mark.link { background: #fdf3e3; color: var(--amber) }
.provider-row > div { flex: 1; min-width: 0 }
.provider-row b { display: block; font-size: 13px }
.provider-row small { display: block; font-size: 11px; color: var(--muted) }
.provider-row em { font-style: normal; font-size: 11px; color: var(--muted); flex: none }

/* —— 角色 —— */
#roles { background: var(--bg-soft) }
.role-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px }
.role-grid article {
  background: #fff; border: 1px solid var(--line); border-radius: 13px; padding: 26px 24px;
}
.role-grid article > span {
  display: inline-grid; place-items: center; width: 34px; height: 34px;
  border-radius: 9px; background: #10141b; color: #7fb0ff; font-size: 12px; font-weight: 700; margin-bottom: 15px;
}
.role-grid h3 { font-size: 15px; margin-bottom: 9px }
.role-grid p { color: var(--muted); font-size: 13px }

/* —— 流程 —— */
.workflow-list { list-style: none; display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; counter-reset: step }
.workflow-list li { border: 1px solid var(--line); border-radius: 13px; padding: 22px; position: relative; background: #fff }
.workflow-list li > span {
  display: grid; place-items: center; width: 34px; height: 34px; border-radius: 50%;
  background: linear-gradient(135deg, #1f6feb, #1857c9); color: #fff; font-weight: 700; font-size: 14px;
  margin-bottom: 15px; box-shadow: 0 8px 16px #1f6feb33;
}
.workflow-list h3 { font-size: 14px; margin-bottom: 8px }
.workflow-list p { color: var(--muted); font-size: 12.5px }

/* —— 服务保障 —— */
.service-card {
  display: grid; grid-template-columns: 1.1fr 1fr; gap: clamp(24px, 4vw, 56px); align-items: center;
  border: 1px solid var(--line); border-radius: 16px; background: #fff;
  padding: clamp(28px, 4vw, 46px); box-shadow: 0 18px 44px #1c243312;
}
.service-card h2 { font-size: clamp(21px, 2.6vw, 27px); margin: 14px 0 12px }
.service-card > div > p { color: var(--muted); font-size: 14px }
.service-points { display: grid; grid-template-columns: 1fr 1fr; gap: 11px }
.service-points span {
  display: flex; align-items: center; gap: 9px; font-size: 13px; color: #3a465a;
  border: 1px solid var(--line); border-radius: 10px; padding: 12px 14px; background: var(--bg-soft);
}
.service-points i {
  font-style: normal; display: grid; place-items: center; width: 20px; height: 20px;
  border-radius: 50%; background: #e7f7f0; color: var(--green); font-size: 11px; font-weight: 700; flex: none;
}

/* —— FAQ —— */
.faq-list { max-width: 760px; display: flex; flex-direction: column; gap: 10px }
.faq-list details { border: 1px solid var(--line); border-radius: 12px; background: #fff; padding: 0 20px }
.faq-list summary {
  list-style: none; cursor: pointer; display: flex; justify-content: space-between; align-items: center;
  gap: 14px; padding: 17px 0; font-size: 14.5px; font-weight: 600;
}
.faq-list summary::-webkit-details-marker { display: none }
.faq-list summary span { color: var(--blue); font-size: 17px; transition: transform .2s }
.faq-list details[open] summary span { transform: rotate(45deg) }
.faq-list p { color: var(--muted); font-size: 13.5px; padding: 0 0 18px }

/* —— CTA 与页脚 —— */
.cta {
  display: flex; align-items: center; justify-content: space-between; gap: 24px; flex-wrap: wrap;
  margin: 0 clamp(18px, 5vw, 56px) clamp(56px, 8vw, 96px);
  background: linear-gradient(120deg, #16305c, #1f6feb);
  border-radius: 18px; padding: clamp(30px, 4vw, 46px) clamp(24px, 4vw, 52px);
  color: #fff; box-shadow: 0 24px 60px #1f6feb2e;
}
.cta small { display: block; font-size: 12px; letter-spacing: 2px; color: #a9c7ff; margin-bottom: 9px }
.cta h2 { font-size: clamp(20px, 2.8vw, 28px); letter-spacing: .5px }
footer {
  background: #10141b; color: #8b95a6; padding: 34px clamp(18px, 5vw, 56px);
  display: flex; align-items: center; justify-content: space-between; gap: 18px; flex-wrap: wrap;
}
.footer-brand { display: flex; align-items: center; gap: 11px }
.footer-brand b { color: #e6edf3; font-size: 13px; display: block }
.footer-brand small { display: block; font-size: 11px }
footer > span { font-size: 12px }
footer a { color: #a9c7ff; font-size: 12px; text-decoration: none }
footer a:hover { text-decoration: underline }

/* —— 响应式 —— */
@media (max-width: 1080px) {
  .feature-grid { grid-template-columns: repeat(2, 1fr) }
  .workflow-list { grid-template-columns: repeat(2, 1fr) }
  .hero { grid-template-columns: 1fr; }
  .hero .product-window { max-width: 640px }
}
@media (max-width: 880px) {
  .topbar nav { display: none }
  .split-section { grid-template-columns: 1fr }
  .split-section.reverse .split-copy { order: 0 }
  .role-grid { grid-template-columns: 1fr }
  .value-strip { grid-template-columns: 1fr; }
  .service-card { grid-template-columns: 1fr }
}
@media (max-width: 640px) {
  .feature-grid, .workflow-list { grid-template-columns: 1fr }
  .window-body { grid-template-columns: 1fr }
  .demo-sidebar { display: none }
  .status-grid { grid-template-columns: 1fr }
  .delivery-detail { grid-template-columns: 1fr }
  .service-points { grid-template-columns: 1fr }
  .cta { flex-direction: column; align-items: flex-start }
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto }
  .feature-card, .button { transition: none }
}