:root {
  --blue: #2f73d9;
  --blue-dark: #1f56aa;
  --blue-soft: #e8f1ff;
  --green: #12a46a;
  --orange: #f28b2e;
  --red: #e2473f;
  --ink: #1f2a37;
  --muted: #667085;
  --line: #d9e2ef;
  --bg: #f3f6fb;
  --card: #ffffff;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: "Microsoft YaHei", "PingFang SC", Arial, sans-serif;
  color: var(--ink);
  background: var(--bg);
  line-height: 1.7;
}

a {
  color: inherit;
  text-decoration: none;
}

.container {
  width: min(1180px, calc(100% - 32px));
  margin: 0 auto;
}

.topbar {
  position: sticky;
  top: 0;
  z-index: 20;
  background: #fff;
  border-bottom: 1px solid var(--line);
  box-shadow: 0 2px 10px rgba(31, 86, 170, 0.05);
}

.topbar-inner {
  min-height: 68px;
  display: flex;
  align-items: center;
  gap: 22px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  min-width: 220px;
}

.brand-mark {
  width: 42px;
  height: 42px;
  border-radius: 8px;
  display: grid;
  place-items: center;
  background: var(--blue);
  color: #fff;
  font-size: 22px;
  font-weight: 800;
}

.brand strong,
.brand small {
  display: block;
}

.brand small {
  color: var(--muted);
  font-size: 12px;
  margin-top: -2px;
}

.nav {
  display: flex;
  gap: 4px;
  margin-left: auto;
}

.nav a {
  padding: 9px 12px;
  border-radius: 6px;
  color: #344054;
  font-size: 14px;
}

.nav a:hover {
  background: var(--blue-soft);
  color: var(--blue-dark);
}

.contact-pill,
.primary-btn,
.copy-btn {
  background: var(--blue);
  color: #fff;
  border: 0;
  border-radius: 6px;
  font-weight: 700;
  cursor: pointer;
}

.contact-pill {
  padding: 9px 14px;
  white-space: nowrap;
}

.band {
  background:
    linear-gradient(180deg, rgba(232, 241, 255, 0.96), rgba(243, 246, 251, 1)),
    radial-gradient(circle at 20% 0%, rgba(47, 115, 217, 0.18), transparent 30%);
  border-bottom: 1px solid var(--line);
}

.hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 390px;
  gap: 28px;
  padding: 54px 0 42px;
  align-items: center;
}

.label {
  display: inline-flex;
  align-items: center;
  padding: 4px 10px;
  border: 1px solid #bad3fa;
  border-radius: 999px;
  color: var(--blue-dark);
  background: rgba(255, 255, 255, 0.74);
  font-size: 13px;
}

h1 {
  margin: 16px 0 14px;
  max-width: 760px;
  font-size: 44px;
  line-height: 1.18;
  letter-spacing: 0;
}

.hero-copy p {
  max-width: 780px;
  margin: 0;
  color: #475467;
  font-size: 17px;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 24px;
}

.hero-stats {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 10px;
  max-width: 620px;
  margin: 22px 0 0;
}

.hero-stats div {
  padding: 12px;
  border: 1px solid #c8d9f0;
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.72);
}

.hero-stats dt {
  color: var(--blue-dark);
  font-size: 24px;
  font-weight: 800;
  line-height: 1.1;
}

.hero-stats dd {
  margin: 4px 0 0;
  color: #53657d;
  font-size: 13px;
}

.primary-btn,
.secondary-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 0 18px;
}

.secondary-btn {
  border: 1px solid #b9c8dd;
  border-radius: 6px;
  background: #fff;
  color: #344054;
  font-weight: 700;
}

.service-line {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 22px;
}

.service-line span {
  background: #fff;
  border: 1px solid var(--line);
  color: #3c506a;
  border-radius: 999px;
  padding: 5px 10px;
  font-size: 13px;
}

.hero-panel,
.post,
.side-card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 8px;
}

.hero-panel {
  overflow: hidden;
  box-shadow: 0 14px 32px rgba(31, 86, 170, 0.1);
}

.panel-head {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 13px 16px;
  color: #fff;
  background: var(--blue);
}

.panel-head span {
  font-size: 13px;
  opacity: 0.88;
}

.mini-contact {
  display: grid;
  grid-template-columns: 76px 1fr;
  gap: 12px;
  align-items: center;
  padding: 14px;
  background: #fff8f2;
  border-bottom: 1px solid #f2d2b3;
}

.mini-contact img {
  width: 76px;
  height: 76px;
  border-radius: 8px;
  border: 1px solid #f2c291;
  background: #fff;
  object-fit: cover;
}

.mini-contact b,
.mini-contact span {
  display: block;
}

.mini-contact b {
  font-size: 18px;
}

.mini-contact span {
  color: #c35a08;
  font-weight: 800;
}

.thread-rank {
  list-style: none;
  padding: 8px 14px 14px;
  margin: 0;
}

.thread-rank li {
  display: grid;
  grid-template-columns: 26px 1fr;
  gap: 8px;
  padding: 10px 0;
  border-bottom: 1px solid #edf1f7;
}

.thread-rank li:last-child {
  border-bottom: 0;
}

.thread-rank b {
  width: 22px;
  height: 22px;
  border-radius: 5px;
  display: grid;
  place-items: center;
  background: #eef5ff;
  color: var(--blue-dark);
  font-size: 12px;
}

.thread-rank a {
  color: #263850;
  font-size: 14px;
}

.layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 310px;
  gap: 18px;
  padding: 26px 0 46px;
}

.main-feed {
  display: grid;
  gap: 14px;
}

.post {
  scroll-margin-top: 88px;
  overflow: hidden;
}

.post.pinned {
  border-top: 3px solid var(--blue);
}

.post-meta {
  display: grid;
  grid-template-columns: 46px 1fr;
  gap: 12px;
  padding: 18px 20px;
  background: #f8fbff;
  border-bottom: 1px solid var(--line);
}

.avatar {
  width: 42px;
  height: 42px;
  display: grid;
  place-items: center;
  border-radius: 8px;
  background: var(--red);
  color: #fff;
  font-weight: 800;
}

.avatar.green {
  background: var(--green);
}

.avatar.blue {
  background: var(--blue);
}

.avatar.orange {
  background: var(--orange);
}

.post h2,
.side-card h2 {
  margin: 0;
  line-height: 1.35;
}

.post h2 {
  font-size: 22px;
}

.post-meta p {
  margin: 3px 0 0;
  color: var(--muted);
  font-size: 13px;
}

.post-body {
  padding: 20px;
}

.post-body p {
  margin-top: 0;
}

.module-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
}

.module-grid div,
.mode-list section,
.steps div,
.scenario-grid section,
.feature-table div,
.delivery-box {
  border: 1px solid #e4ebf5;
  border-radius: 8px;
  background: #fff;
  padding: 14px;
}

.module-grid h3,
.mode-list h3 {
  margin: 0 0 6px;
  color: var(--blue-dark);
  font-size: 17px;
}

.module-grid p,
.mode-list p {
  margin: 0;
  color: #53657d;
  font-size: 14px;
}

.mode-list,
.steps,
.scenario-grid {
  display: grid;
  gap: 10px;
}

.scenario-grid {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.scenario-grid b {
  display: block;
  color: var(--blue-dark);
  margin-bottom: 4px;
}

.scenario-grid p {
  margin: 0;
  color: #53657d;
  font-size: 14px;
}

.data-strip {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 10px;
  margin-top: 14px;
}

.data-strip div {
  padding: 12px;
  border-radius: 8px;
  background: #f8fbff;
  border: 1px solid #dbe8f8;
}

.data-strip strong,
.data-strip span {
  display: block;
}

.data-strip strong {
  color: var(--blue-dark);
}

.data-strip span {
  color: #53657d;
  font-size: 13px;
}

.feature-table {
  display: grid;
  gap: 10px;
}

.feature-table div {
  display: grid;
  grid-template-columns: 110px 1fr;
  gap: 14px;
  align-items: start;
}

.feature-table strong {
  color: var(--blue-dark);
}

.feature-table span {
  color: #53657d;
}

.steps div {
  display: grid;
  grid-template-columns: 46px 1fr;
  align-items: start;
}

.steps b {
  color: var(--blue);
  font-size: 18px;
}

.delivery-box {
  margin-top: 14px;
  background: #fbfdff;
}

.delivery-box h3 {
  margin: 0 0 8px;
  color: var(--blue-dark);
}

.delivery-box ul {
  margin: 0;
  padding-left: 20px;
  color: #53657d;
}

.faq-list {
  display: grid;
  gap: 10px;
}

.faq-list details {
  border: 1px solid #e4ebf5;
  border-radius: 8px;
  background: #fff;
  padding: 13px 14px;
}

.faq-list summary {
  cursor: pointer;
  font-weight: 700;
  color: var(--blue-dark);
}

.faq-list p {
  margin: 8px 0 0;
  color: #53657d;
}

.sidebar {
  display: grid;
  align-content: start;
  gap: 14px;
  position: sticky;
  top: 86px;
}

.side-card {
  padding: 18px;
}

.side-card h2 {
  font-size: 18px;
}

.side-card p {
  color: #53657d;
  margin: 8px 0 12px;
}

.contact-card {
  border-top: 3px solid var(--blue);
}

.wechat {
  margin: 12px 0;
  padding: 13px 12px;
  border: 1px dashed #97b9ed;
  border-radius: 8px;
  background: #f0f6ff;
  color: var(--blue-dark);
  font-size: 26px;
  font-weight: 800;
  text-align: center;
  letter-spacing: 0;
}

.qr-code {
  width: 100%;
  max-width: 220px;
  display: block;
  margin: 12px auto 10px;
  border-radius: 8px;
  border: 1px solid #f0c08d;
  background: #fff;
}

.copy-btn {
  width: 100%;
  min-height: 42px;
  font-size: 15px;
}

.contact-card small {
  display: block;
  margin-top: 10px;
  color: var(--muted);
}

.hot-list {
  list-style: none;
  padding: 0;
  margin: 10px 0 0;
}

.hot-list li {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 9px 0;
  border-bottom: 1px solid #edf1f7;
}

.hot-list li:last-child {
  border-bottom: 0;
}

.hot-list span {
  flex: 0 0 auto;
  min-width: 22px;
  height: 22px;
  border-radius: 5px;
  display: grid;
  place-items: center;
  background: #fff1e6;
  color: #c35a08;
  font-size: 12px;
}

.compact {
  margin-bottom: 0;
}

.side-stats {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 8px;
  margin-top: 10px;
}

.side-stats div {
  padding: 10px 6px;
  border-radius: 8px;
  background: #f8fbff;
  text-align: center;
}

.side-stats b,
.side-stats span {
  display: block;
}

.side-stats b {
  color: var(--blue-dark);
}

.side-stats span {
  color: var(--muted);
  font-size: 12px;
}

.site-links {
  list-style: none;
  padding: 0;
  margin: 10px 0 0;
}

.site-links li {
  padding: 8px 0;
  border-bottom: 1px solid #edf1f7;
}

.site-links li:last-child {
  border-bottom: 0;
}

.site-links a {
  color: var(--blue-dark);
  font-weight: 700;
  overflow-wrap: anywhere;
}

.footer {
  background: #1f2a37;
  color: #dce6f5;
}

.footer-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 22px 0;
}

.footer p {
  margin: 0;
}

.footer a {
  color: #fff;
  font-weight: 700;
}

.footer-links {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 12px;
}

.mobile-cta {
  display: none;
}

@media (max-width: 900px) {
  .topbar-inner {
    flex-wrap: wrap;
    padding: 10px 0;
  }

  .nav {
    order: 3;
    width: 100%;
    overflow-x: auto;
    margin-left: 0;
    padding-bottom: 2px;
  }

  .hero-grid,
  .layout {
    grid-template-columns: 1fr;
  }

  .sidebar {
    position: static;
  }

  h1 {
    font-size: 34px;
  }

  .data-strip {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 620px) {
  body {
    padding-bottom: 72px;
  }

  .container {
    width: min(100% - 22px, 1180px);
  }

  .topbar {
    position: static;
  }

  .topbar-inner {
    gap: 10px;
  }

  .brand {
    min-width: 0;
  }

  .brand-mark {
    width: 36px;
    height: 36px;
    font-size: 19px;
  }

  .brand small {
    display: none;
  }

  .contact-pill {
    margin-left: auto;
    padding: 8px 10px;
    font-size: 13px;
  }

  .nav {
    gap: 8px;
  }

  .nav a {
    flex: 0 0 auto;
    background: #f6f9ff;
    border: 1px solid #e2ebf7;
  }

  .hero-grid {
    padding: 26px 0 22px;
    gap: 16px;
  }

  h1 {
    font-size: 27px;
  }

  .hero-copy p {
    font-size: 15px;
  }

  .hero-actions a {
    flex: 1 1 150px;
  }

  .hero-stats,
  .module-grid,
  .scenario-grid {
    grid-template-columns: 1fr;
  }

  .service-line span {
    font-size: 12px;
  }

  .mini-contact {
    grid-template-columns: 88px 1fr;
  }

  .mini-contact img {
    width: 88px;
    height: 88px;
  }

  .post-meta {
    grid-template-columns: 40px 1fr;
    padding: 15px;
  }

  .avatar {
    width: 38px;
    height: 38px;
  }

  .post-body,
  .side-card {
    padding: 15px;
  }

  .post h2 {
    font-size: 19px;
  }

  .feature-table div {
    grid-template-columns: 1fr;
    gap: 4px;
  }

  .steps div {
    grid-template-columns: 40px 1fr;
  }

  .qr-code {
    max-width: 260px;
  }

  .footer-inner {
    display: block;
  }

  .footer a {
    display: inline-block;
    margin-top: 8px;
  }

  .footer-links {
    justify-content: flex-start;
    margin-top: 8px;
  }

  .mobile-cta {
    position: fixed;
    left: 10px;
    right: 10px;
    bottom: 10px;
    z-index: 30;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 10px;
    padding: 10px 12px;
    border: 1px solid #b9d0ef;
    border-radius: 8px;
    background: #fff;
    box-shadow: 0 12px 32px rgba(31, 42, 55, 0.18);
  }

  .mobile-cta span {
    min-width: 0;
    color: #344054;
    font-size: 14px;
  }

  .mobile-cta b {
    color: var(--blue-dark);
  }

  .mobile-cta a {
    flex: 0 0 auto;
    padding: 8px 12px;
    border-radius: 6px;
    background: var(--blue);
    color: #fff;
    font-weight: 700;
    font-size: 14px;
  }
}