:root {
  --ink: #17212b;
  --text: #344150;
  --muted: #6e7b88;
  --line: #dfe7ee;
  --paper: #ffffff;
  --soft: #f4f8f8;
  --mint: #28b99a;
  --teal: #087f8c;
  --blue: #2f6fed;
  --coral: #e06651;
  --purple: #7764d8;
  --amber: #c9912c;
  --shadow: 0 24px 70px rgba(20, 37, 53, 0.14);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--text);
  background: var(--soft);
  font-family: "Microsoft YaHei", "PingFang SC", "Noto Sans CJK SC", Arial, sans-serif;
  line-height: 1.65;
}

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

.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: 32px;
  min-height: 76px;
  padding: 0 6vw;
  background: rgba(255, 255, 255, 0.9);
  border-bottom: 1px solid rgba(223, 231, 238, 0.9);
  backdrop-filter: blur(18px);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  min-width: 214px;
}

.brand-symbol {
  display: grid;
  place-items: center;
  width: 42px;
  height: 42px;
  color: #ffffff;
  background: linear-gradient(135deg, var(--teal), var(--mint));
  border-radius: 8px;
  font-weight: 900;
}

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

.brand strong {
  color: var(--ink);
  font-size: 18px;
}

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

.nav {
  display: flex;
  justify-content: center;
  gap: 26px;
  color: #425061;
  font-size: 15px;
}

.nav a {
  padding: 8px 0;
  border-bottom: 2px solid transparent;
}

.nav a:hover {
  border-color: var(--mint);
}

.header-action,
.button,
.contact-form button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 0 20px;
  border-radius: 8px;
  font-weight: 800;
}

.header-action,
.button.primary,
.contact-form button {
  color: #ffffff;
  background: var(--ink);
  border: 1px solid var(--ink);
}

.button.ghost {
  color: var(--ink);
  background: #ffffff;
  border: 1px solid var(--line);
}

.hero {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(360px, 520px);
  gap: 56px;
  align-items: center;
  min-height: calc(100vh - 76px);
  padding: 80px 6vw 96px;
  background:
    radial-gradient(circle at 15% 20%, rgba(40, 185, 154, 0.18), transparent 28%),
    linear-gradient(135deg, #ffffff 0%, #eef8f5 100%);
}

.label {
  margin: 0 0 14px;
  color: var(--teal);
  font-size: 13px;
  font-weight: 900;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

h1,
h2,
h3,
p {
  margin-top: 0;
}

h1 {
  max-width: 850px;
  margin-bottom: 24px;
  color: var(--ink);
  font-size: clamp(44px, 7vw, 78px);
  line-height: 1.05;
  letter-spacing: 0;
}

h2 {
  color: var(--ink);
  font-size: clamp(30px, 4vw, 50px);
  line-height: 1.16;
  letter-spacing: 0;
}

h3 {
  color: var(--ink);
  line-height: 1.32;
}

.hero-lead {
  max-width: 740px;
  margin-bottom: 30px;
  color: #445465;
  font-size: 20px;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-bottom: 34px;
}

.trust-strip {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.trust-strip span {
  padding: 8px 12px;
  color: #2f4a56;
  background: rgba(255, 255, 255, 0.78);
  border: 1px solid var(--line);
  border-radius: 8px;
  font-weight: 700;
}

.hero-product {
  min-height: 560px;
  padding: 28px;
  background: rgba(255, 255, 255, 0.92);
  border: 1px solid var(--line);
  border-radius: 8px;
  box-shadow: var(--shadow);
}

.product-top {
  display: flex;
  justify-content: space-between;
  gap: 18px;
  color: var(--muted);
  font-weight: 700;
}

.product-top strong {
  color: var(--coral);
}

.radar {
  position: relative;
  display: grid;
  place-items: center;
  height: 310px;
  margin: 26px 0;
  background:
    linear-gradient(#eef3f5 1px, transparent 1px),
    linear-gradient(90deg, #eef3f5 1px, transparent 1px);
  background-size: 28px 28px;
  border: 1px solid #dbe7ea;
  border-radius: 8px;
  overflow: hidden;
}

.radar-ring {
  position: absolute;
  border: 2px solid rgba(8, 127, 140, 0.25);
  border-radius: 50%;
}

.ring-one {
  width: 220px;
  height: 220px;
}

.ring-two {
  width: 138px;
  height: 138px;
}

.radar-core {
  display: grid;
  place-items: center;
  width: 76px;
  height: 76px;
  color: #ffffff;
  background: var(--teal);
  border-radius: 50%;
  font-size: 28px;
  font-weight: 900;
  box-shadow: 0 0 0 18px rgba(40, 185, 154, 0.12);
}

.radar-point {
  position: absolute;
  width: 14px;
  height: 14px;
  background: var(--coral);
  border: 3px solid #ffffff;
  border-radius: 50%;
  box-shadow: 0 6px 18px rgba(224, 102, 81, 0.35);
}

.point-a {
  top: 60px;
  left: 38%;
}

.point-b {
  right: 20%;
  top: 120px;
}

.point-c {
  bottom: 66px;
  left: 26%;
}

.point-d {
  right: 32%;
  bottom: 44px;
}

.insight-list {
  display: grid;
  gap: 12px;
}

.insight-list div {
  display: grid;
  grid-template-columns: 86px 1fr;
  gap: 16px;
  align-items: center;
  padding: 16px;
  background: #f7faf9;
  border: 1px solid var(--line);
  border-radius: 8px;
}

.insight-list span {
  color: var(--muted);
  font-size: 14px;
}

.insight-list strong {
  color: var(--ink);
}

.section {
  padding: 82px 6vw;
}

.section-title {
  display: grid;
  grid-template-columns: minmax(0, 0.9fr) minmax(320px, 0.6fr);
  gap: 42px;
  align-items: end;
  margin-bottom: 36px;
}

.section-title.narrow {
  display: block;
  max-width: 860px;
}

.problem-grid,
.audience-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 18px;
}

.problem-grid article,
.audience-grid article,
.solution-card,
.contact-form {
  background: #ffffff;
  border: 1px solid var(--line);
  border-radius: 8px;
}

.problem-grid article {
  min-height: 260px;
  padding: 28px;
}

.problem-grid span {
  color: var(--mint);
  font-weight: 900;
}

.problem-grid p,
.solution-card p,
.audience-grid p,
.workspace-copy li,
.plan-list p,
.contact-intro,
.contact-points span {
  color: #526272;
}

.solutions-section {
  background: #ffffff;
  border-block: 1px solid var(--line);
}

.solution-grid {
  display: grid;
  grid-template-columns: repeat(5, minmax(210px, 1fr));
  gap: 18px;
}

.solution-card {
  min-height: 430px;
  padding: 26px 22px;
}

.card-icon {
  display: grid;
  place-items: center;
  width: 52px;
  height: 52px;
  margin-bottom: 22px;
  color: #ffffff;
  background: var(--accent);
  border-radius: 8px;
  font-size: 24px;
  font-weight: 900;
}

.solution-card h3 {
  margin-bottom: 10px;
  font-size: 24px;
}

.solution-card ul {
  display: grid;
  gap: 8px;
  margin: 22px 0 0;
  padding-left: 20px;
  color: #384b5b;
}

.blue {
  --accent: var(--blue);
}

.green {
  --accent: var(--teal);
}

.coral {
  --accent: var(--coral);
}

.purple {
  --accent: var(--purple);
}

.amber {
  --accent: var(--amber);
}

.workspace-section {
  background: #101923;
}

.workspace-section h2,
.workspace-section h3 {
  color: #ffffff;
}

.workspace-section .label {
  color: #7bd8c6;
}

.workspace {
  display: grid;
  grid-template-columns: minmax(360px, 0.95fr) 1fr;
  gap: 42px;
  align-items: center;
}

.workspace-panel {
  padding: 22px;
  background: #172330;
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: 8px;
  box-shadow: 0 28px 80px rgba(0, 0, 0, 0.35);
}

.window-bar {
  display: flex;
  gap: 8px;
  margin-bottom: 22px;
}

.window-bar span {
  width: 12px;
  height: 12px;
  background: #7bd8c6;
  border-radius: 50%;
}

.workspace-row {
  padding: 20px;
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: 8px;
}

.workspace-row + .workspace-row {
  margin-top: 12px;
}

.workspace-row strong {
  display: block;
  color: #ffffff;
  margin-bottom: 6px;
}

.workspace-row p {
  margin-bottom: 0;
  color: #b7c4ce;
}

.workspace-copy ol {
  display: grid;
  gap: 16px;
  margin: 18px 0 0;
  padding-left: 22px;
}

.workspace-copy strong {
  color: #ffffff;
}

.audience-grid {
  grid-template-columns: repeat(4, 1fr);
}

.audience-grid article {
  min-height: 210px;
  padding: 26px;
}

.contact-section {
  display: grid;
  grid-template-columns: minmax(0, 0.9fr) minmax(360px, 0.65fr);
  gap: 54px;
  align-items: start;
  background:
    linear-gradient(135deg, rgba(8, 127, 140, 0.1), transparent 55%),
    #f8fbfa;
}

.contact-points {
  display: grid;
  gap: 14px;
  max-width: 620px;
  margin-top: 28px;
}

.contact-points div {
  display: grid;
  gap: 4px;
  padding: 16px 18px;
  background: rgba(255, 255, 255, 0.72);
  border: 1px solid var(--line);
  border-radius: 8px;
}

.contact-points strong {
  color: var(--ink);
}

.contact-form {
  display: grid;
  gap: 18px;
  padding: 28px;
  box-shadow: var(--shadow);
}

.form-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
}

.contact-form label {
  display: grid;
  gap: 8px;
  color: var(--ink);
  font-weight: 800;
}

.contact-form select,
.contact-form input,
.contact-form textarea {
  width: 100%;
  min-height: 48px;
  padding: 0 12px;
  color: #263544;
  background: #f8fbfa;
  border: 1px solid var(--line);
  border-radius: 8px;
  font: inherit;
}

.contact-form textarea {
  min-height: 112px;
  padding-block: 10px;
  resize: vertical;
}

.contact-form button {
  width: 100%;
  cursor: pointer;
  font: inherit;
}

.form-note {
  margin: 0;
  color: var(--muted);
  font-size: 14px;
}

.form-note.warning {
  color: #b84c33;
  font-weight: 800;
}

.footer {
  display: flex;
  justify-content: center;
  gap: 14px;
  padding: 30px 6vw 42px;
  color: #657482;
  border-top: 1px solid var(--line);
}

.footer strong {
  color: var(--ink);
}

.admin-body {
  min-height: 100vh;
  background:
    radial-gradient(circle at 12% 16%, rgba(40, 185, 154, 0.2), transparent 28%),
    #f4f8f8;
}

.admin-shell {
  width: min(1180px, calc(100% - 40px));
  margin: 0 auto;
  padding: 42px 0;
}

.admin-card {
  padding: 32px;
  background: #ffffff;
  border: 1px solid var(--line);
  border-radius: 8px;
  box-shadow: var(--shadow);
}

.admin-head {
  display: flex;
  justify-content: space-between;
  gap: 24px;
  align-items: flex-start;
  margin-bottom: 28px;
  padding-bottom: 24px;
  border-bottom: 1px solid var(--line);
}

.admin-head h1 {
  margin-bottom: 10px;
  font-size: clamp(32px, 5vw, 54px);
}

.admin-login {
  display: grid;
  grid-template-columns: minmax(260px, 1fr) auto;
  gap: 16px;
  align-items: end;
}

.admin-login label,
.admin-editor label {
  display: grid;
  gap: 8px;
  color: var(--ink);
  font-weight: 800;
}

.admin-login input,
.admin-editor input,
.admin-editor textarea {
  width: 100%;
  padding: 12px;
  color: #263544;
  background: #f8fbfa;
  border: 1px solid var(--line);
  border-radius: 8px;
  font: inherit;
}

.admin-editor textarea {
  resize: vertical;
}

.editor-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
}

.editor-grid .wide {
  grid-column: 1 / -1;
}

.admin-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  align-items: center;
  margin-top: 24px;
  padding-top: 24px;
  border-top: 1px solid var(--line);
}

.is-hidden {
  display: none;
}

@media (max-width: 1180px) {
  .solution-grid,
  .audience-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .problem-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 920px) {
  .site-header {
    position: static;
    grid-template-columns: 1fr;
    gap: 16px;
    padding-block: 18px;
  }

  .nav {
    justify-content: flex-start;
    flex-wrap: wrap;
    gap: 16px;
  }

  .hero,
  .workspace,
  .contact-section,
  .section-title,
  .form-grid {
    grid-template-columns: 1fr;
  }

  .hero {
    min-height: auto;
  }

}

@media (max-width: 640px) {
  .site-header,
  .hero,
  .section {
    padding-inline: 20px;
  }

  h1 {
    font-size: 40px;
  }

  .hero-lead {
    font-size: 17px;
  }

  .solution-grid,
  .audience-grid {
    grid-template-columns: 1fr;
  }

  .hero-product,
  .workspace-panel {
    min-width: 0;
  }

  .hero-actions,
  .button {
    width: 100%;
  }

  .footer {
    flex-direction: column;
    align-items: center;
    text-align: center;
  }

  .admin-card {
    padding: 22px;
  }

  .admin-head,
  .admin-login {
    grid-template-columns: 1fr;
    flex-direction: column;
  }

  .editor-grid {
    grid-template-columns: 1fr;
  }
}