:root {
  --ink: #132033;
  --muted: #667389;
  --line: #dbe3ee;
  --paper: #ffffff;
  --soft: #f4f7fb;
  --brand: #06376f;
  --brand-2: #146a7b;
  --accent: #9ee82a;
  --warm: #f3b23f;
  --shadow: 0 18px 48px rgba(19, 32, 51, 0.16);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--ink);
  font-family: "Microsoft YaHei", "PingFang SC", "Segoe UI", Arial, sans-serif;
  background: var(--paper);
  line-height: 1.65;
}

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

img {
  display: block;
  max-width: 100%;
}

.site-header {
  position: fixed;
  z-index: 20;
  top: 0;
  left: 0;
  right: 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 14px clamp(18px, 4vw, 56px);
  background: rgba(255, 255, 255, 0.92);
  border-bottom: 1px solid rgba(219, 227, 238, 0.82);
  backdrop-filter: blur(16px);
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  min-width: 230px;
}

.brand img {
  width: 44px;
  height: 44px;
  object-fit: cover;
  object-position: top center;
  border-radius: 50%;
}

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

.brand strong {
  font-size: 16px;
}

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

.main-nav {
  display: flex;
  gap: clamp(16px, 3vw, 36px);
  color: #35425a;
  font-size: 15px;
}

.main-nav a {
  padding: 8px 0;
}

.header-action,
.primary-button,
.secondary-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  border-radius: 8px;
  font-weight: 700;
}

.header-action,
.primary-button {
  color: #071322;
  background: var(--accent);
  box-shadow: 0 10px 26px rgba(158, 232, 42, 0.24);
}

.header-action {
  min-width: 108px;
  padding: 0 18px;
}

.secondary-button {
  color: #ffffff;
  border: 1px solid rgba(255, 255, 255, 0.58);
  padding: 0 22px;
}

.hero {
  position: relative;
  min-height: 92vh;
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(320px, 0.58fr);
  align-items: center;
  gap: clamp(28px, 5vw, 76px);
  padding: 112px clamp(18px, 5vw, 72px) 64px;
  overflow: hidden;
  color: #ffffff;
  background: #101820 url("login_runner_bg.png") center / cover no-repeat;
}

.hero-overlay {
  position: absolute;
  inset: 0;
  background:
    linear-gradient(90deg, rgba(6, 16, 31, 0.92) 0%, rgba(6, 16, 31, 0.72) 46%, rgba(6, 16, 31, 0.45) 100%),
    linear-gradient(180deg, rgba(6, 16, 31, 0.25), rgba(6, 16, 31, 0.74));
}

.hero-content,
.hero-panel {
  position: relative;
  z-index: 1;
}

.eyebrow {
  margin: 0 0 12px;
  color: var(--accent);
  font-size: 13px;
  font-weight: 800;
  text-transform: uppercase;
}

.hero h1 {
  margin: 0;
  max-width: 780px;
  font-size: clamp(42px, 6.2vw, 86px);
  line-height: 1.02;
}

.hero-copy {
  max-width: 700px;
  margin: 24px 0 0;
  color: rgba(255, 255, 255, 0.82);
  font-size: clamp(17px, 2vw, 22px);
}

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

.hero-actions .primary-button {
  min-width: 132px;
  padding: 0 24px;
}

.hero-panel {
  align-self: end;
  width: min(100%, 460px);
  margin-left: auto;
  padding: 24px;
  color: var(--ink);
  background: rgba(255, 255, 255, 0.93);
  border: 1px solid rgba(255, 255, 255, 0.64);
  border-radius: 8px;
  box-shadow: var(--shadow);
}

.panel-topline {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 18px;
  color: var(--muted);
  font-size: 14px;
}

.panel-topline strong {
  color: var(--brand-2);
}

.metric-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
}

.metric-grid div {
  min-height: 92px;
  padding: 14px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #f9fbff;
}

.metric-grid span,
.metric-grid strong {
  display: block;
}

.metric-grid span {
  color: var(--muted);
  font-size: 13px;
}

.metric-grid strong {
  margin-top: 6px;
  font-size: 30px;
  line-height: 1;
}

.flow-list {
  display: grid;
  gap: 10px;
  margin-top: 18px;
}

.flow-list p {
  display: flex;
  gap: 10px;
  margin: 0;
  color: #35425a;
  font-size: 14px;
}

.flow-list span {
  width: 10px;
  height: 10px;
  flex: 0 0 auto;
  margin-top: 7px;
  border-radius: 50%;
  background: var(--accent);
}

.section {
  padding: 84px clamp(18px, 5vw, 72px);
}

.compact-band {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 1px;
  padding-top: 0;
  padding-bottom: 0;
  background: var(--line);
}

.stat {
  min-height: 126px;
  display: grid;
  align-content: center;
  gap: 4px;
  padding: 24px;
  background: #ffffff;
}

.stat strong {
  color: var(--brand);
  font-size: 28px;
}

.stat span {
  color: var(--muted);
}

.section-heading {
  max-width: 840px;
  margin-bottom: 36px;
}

.section-heading.narrow {
  max-width: 640px;
}

.section-heading h2,
.contact-copy h2 {
  margin: 0;
  font-size: clamp(30px, 4vw, 50px);
  line-height: 1.16;
}

.section-heading p:not(.eyebrow),
.contact-copy > p {
  margin: 14px 0 0;
  color: var(--muted);
  font-size: 17px;
}

.product-section {
  background: var(--soft);
}

.feature-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
}

.feature-card {
  min-height: 238px;
  padding: 24px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--paper);
}

.feature-icon {
  display: inline-grid;
  place-items: center;
  width: 42px;
  height: 42px;
  color: #071322;
  background: var(--accent);
  border-radius: 8px;
  font-weight: 900;
}

.feature-card h3,
.scene-copy h3,
.service-steps h3 {
  margin: 18px 0 8px;
  font-size: 22px;
}

.feature-card p,
.scene-copy p,
.service-steps p {
  margin: 0;
  color: var(--muted);
}

.scene-layout {
  display: grid;
  grid-template-columns: minmax(0, 0.8fr) minmax(360px, 1fr);
  gap: clamp(30px, 5vw, 80px);
  align-items: center;
}

.check-list {
  display: grid;
  gap: 12px;
  margin: 24px 0 0;
  padding: 0;
  list-style: none;
}

.check-list li {
  position: relative;
  padding-left: 24px;
}

.check-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 10px;
  width: 10px;
  height: 10px;
  background: var(--warm);
  border-radius: 50%;
}

.workflow {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 12px;
}

.workflow div {
  min-height: 112px;
  display: grid;
  place-items: center;
  color: #ffffff;
  border-radius: 8px;
  background: linear-gradient(135deg, var(--brand), var(--brand-2));
  font-size: 20px;
  font-weight: 800;
  box-shadow: 0 12px 28px rgba(6, 55, 111, 0.18);
}

.workflow div:nth-child(2n) {
  background: linear-gradient(135deg, #2b6b58, #3e806c);
}

.workflow div:nth-child(7) {
  grid-column: span 2;
  background: linear-gradient(135deg, #a36d11, #c18a2b);
}

.service-section {
  background: #fbfcf6;
}

.service-steps {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 16px;
}

.service-steps article {
  min-height: 210px;
  padding: 24px;
  border: 1px solid #e2e7c9;
  border-radius: 8px;
  background: #ffffff;
}

.service-steps span {
  color: var(--brand-2);
  font-weight: 900;
}

.contact-section {
  display: grid;
  grid-template-columns: minmax(0, 0.78fr) minmax(360px, 0.72fr);
  gap: clamp(30px, 5vw, 76px);
  background: #111923;
  color: #ffffff;
}

.contact-copy > p {
  color: rgba(255, 255, 255, 0.74);
}

.contact-lines {
  display: grid;
  gap: 12px;
  margin-top: 30px;
}

.contact-lines p {
  display: grid;
  gap: 3px;
  margin: 0;
}

.contact-lines strong {
  color: var(--accent);
}

.contact-lines span {
  color: rgba(255, 255, 255, 0.76);
}

.contact-form {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
  padding: 24px;
  border: 1px solid rgba(255, 255, 255, 0.14);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.08);
}

.form-row {
  display: grid;
  gap: 8px;
}

.form-row.full,
.form-button,
.form-status {
  grid-column: 1 / -1;
}

label {
  color: rgba(255, 255, 255, 0.76);
  font-size: 14px;
}

input,
select,
textarea {
  width: 100%;
  min-height: 44px;
  color: #ffffff;
  border: 1px solid rgba(255, 255, 255, 0.22);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.1);
  padding: 10px 12px;
  font: inherit;
}

textarea {
  resize: vertical;
}

select option {
  color: var(--ink);
}

input:focus,
select:focus,
textarea:focus {
  outline: 2px solid rgba(158, 232, 42, 0.5);
  outline-offset: 2px;
}

.form-button {
  border: 0;
  cursor: pointer;
  font: inherit;
}

.form-button:disabled {
  cursor: wait;
  opacity: 0.7;
}

.form-status {
  min-height: 24px;
  margin: 0;
  color: var(--accent);
}

.form-status.error {
  color: #ffcf90;
}

.site-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  padding: 24px clamp(18px, 5vw, 72px);
  color: #617086;
  background: #ffffff;
  border-top: 1px solid var(--line);
}

.site-footer p {
  margin: 0;
}

@media (max-width: 980px) {
  .site-header {
    position: sticky;
    flex-wrap: wrap;
  }

  .main-nav {
    order: 3;
    width: 100%;
    justify-content: space-between;
  }

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

  .hero {
    padding-top: 76px;
  }

  .hero-panel {
    margin-left: 0;
  }

  .compact-band,
  .feature-grid,
  .service-steps {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 640px) {
  .site-header {
    padding: 12px 16px;
  }

  .brand {
    min-width: 0;
  }

  .brand strong {
    font-size: 14px;
  }

  .header-action {
    display: none;
  }

  .hero {
    min-height: auto;
    padding: 54px 18px 40px;
  }

  .hero h1 {
    font-size: 40px;
  }

  .hero-panel {
    padding: 18px;
  }

  .compact-band,
  .feature-grid,
  .service-steps,
  .contact-form,
  .workflow {
    grid-template-columns: 1fr;
  }

  .workflow div:nth-child(7) {
    grid-column: auto;
  }

  .section {
    padding: 56px 18px;
  }

  .contact-section {
    padding-top: 60px;
    padding-bottom: 60px;
  }

  .site-footer {
    align-items: flex-start;
    flex-direction: column;
  }
}