:root {
  color-scheme: light;
  --ink: #111827;
  --muted: #5b6472;
  --line: #dfe5ec;
  --paper: #f7f9fb;
  --white: #ffffff;
  --dark: #07111e;
  --teal: #0f766e;
  --cyan: #0891b2;
  --green: #16a34a;
  --amber: #d97706;
  --red: #be123c;
  --shadow: 0 24px 70px rgba(15, 23, 42, 0.12);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--ink);
  background: var(--paper);
  overflow-x: hidden;
  font-family:
    "Inter", "PingFang SC", "Microsoft YaHei", "Noto Sans SC", Arial,
    sans-serif;
  letter-spacing: 0;
}

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

.site-header {
  position: fixed;
  z-index: 20;
  top: 0;
  left: 0;
  right: 0;
  display: flex;
  align-items: center;
  gap: 28px;
  min-height: 72px;
  padding: 0 clamp(20px, 4vw, 56px);
  color: #eef6f8;
  background: rgba(7, 17, 30, 0.82);
  border-bottom: 1px solid rgba(255, 255, 255, 0.12);
  backdrop-filter: blur(18px);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  min-width: 220px;
  font-weight: 800;
}

.brand-mark {
  display: grid;
  place-items: center;
  width: 34px;
  height: 34px;
  border-radius: 8px;
  background: #e6fffb;
  color: #0f766e;
  font-size: 16px;
  font-weight: 900;
}

.brand-text {
  white-space: nowrap;
}

.main-nav {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: clamp(16px, 3vw, 34px);
  flex: 1;
  color: rgba(238, 246, 248, 0.78);
  font-size: 14px;
}

.main-nav a,
.nav-action {
  transition:
    color 0.2s ease,
    border-color 0.2s ease,
    background 0.2s ease;
}

.main-nav a:hover {
  color: #ffffff;
}

.nav-action {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 40px;
  padding: 0 18px;
  border: 1px solid rgba(255, 255, 255, 0.22);
  border-radius: 8px;
  color: #ffffff;
  font-size: 14px;
  white-space: nowrap;
}

.nav-action:hover {
  background: rgba(255, 255, 255, 0.1);
  border-color: rgba(255, 255, 255, 0.42);
}

.hero {
  position: relative;
  min-height: 760px;
  overflow: hidden;
  color: #ffffff;
  background:
    linear-gradient(135deg, rgba(5, 12, 24, 0.96), rgba(11, 36, 42, 0.9)),
    #07111e;
}

#routeCanvas,
.hero-shade {
  position: absolute;
  inset: 0;
}

.hero-shade {
  background:
    linear-gradient(90deg, rgba(7, 17, 30, 0.9) 0%, rgba(7, 17, 30, 0.48) 48%, rgba(7, 17, 30, 0.74) 100%),
    repeating-linear-gradient(
      0deg,
      rgba(255, 255, 255, 0.035) 0,
      rgba(255, 255, 255, 0.035) 1px,
      transparent 1px,
      transparent 52px
    );
}

.hero-inner {
  position: relative;
  z-index: 2;
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(360px, 480px);
  align-items: center;
  gap: clamp(36px, 5vw, 72px);
  width: min(1180px, calc(100% - 40px));
  min-height: 760px;
  margin: 0 auto;
  padding: 124px 0 72px;
}

.hero-inner > * {
  min-width: 0;
}

.hero-copy {
  max-width: 760px;
  min-width: 0;
}

.eyebrow {
  margin: 0 0 14px;
  color: var(--cyan);
  font-size: 12px;
  font-weight: 800;
  letter-spacing: 0.16em;
}

.hero .eyebrow,
.final-cta .eyebrow {
  color: #67e8f9;
}

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

h1 {
  max-width: 860px;
  margin-bottom: 24px;
  font-size: clamp(42px, 6vw, 76px);
  line-height: 1.04;
  letter-spacing: 0;
}

h1 span {
  display: block;
}

.hero-lede {
  max-width: 680px;
  margin-bottom: 34px;
  color: rgba(238, 246, 248, 0.82);
  font-size: clamp(17px, 2vw, 21px);
  line-height: 1.8;
  overflow-wrap: anywhere;
}

.hero-actions,
.hero-stats,
.panel-top,
.compare-heading,
.site-footer {
  display: flex;
  align-items: center;
}

.hero-actions {
  gap: 14px;
  flex-wrap: wrap;
  margin-bottom: 46px;
}

.primary-button,
.secondary-button,
.plan-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  border-radius: 8px;
  font-weight: 800;
  transition:
    transform 0.2s ease,
    box-shadow 0.2s ease,
    background 0.2s ease;
}

.primary-button {
  padding: 0 24px;
  background: #e6fffb;
  color: #0b4f4a;
  box-shadow: 0 18px 40px rgba(103, 232, 249, 0.18);
}

.primary-button:hover,
.secondary-button:hover,
.plan-button:hover {
  transform: translateY(-2px);
}

.secondary-button {
  padding: 0 22px;
  border: 1px solid rgba(255, 255, 255, 0.22);
  color: #ffffff;
}

.hero-stats {
  gap: 12px;
  flex-wrap: wrap;
}

.hero-stats div {
  min-width: 152px;
  padding: 16px 18px;
  border: 1px solid rgba(255, 255, 255, 0.14);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.07);
}

.hero-stats span {
  display: block;
  margin-bottom: 4px;
  font-size: 28px;
  font-weight: 900;
}

.hero-stats small,
.metric-grid small,
.panel-label {
  color: rgba(238, 246, 248, 0.62);
}

.command-panel {
  min-width: 0;
  min-height: 520px;
  padding: 24px;
  border: 1px solid rgba(255, 255, 255, 0.16);
  border-radius: 8px;
  background: rgba(6, 16, 29, 0.72);
  box-shadow: 0 32px 80px rgba(0, 0, 0, 0.32);
  backdrop-filter: blur(20px);
}

.panel-top {
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 26px;
}

.panel-top strong,
.panel-label {
  display: block;
}

.panel-top strong {
  margin-top: 6px;
  font-size: 20px;
}

.status-pill {
  padding: 7px 10px;
  border-radius: 8px;
  background: rgba(22, 163, 74, 0.18);
  color: #bbf7d0;
  font-size: 12px;
  font-weight: 900;
}

.traffic-map {
  position: relative;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
  min-height: 220px;
  margin-bottom: 22px;
  padding: 16px;
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: 8px;
  background:
    linear-gradient(90deg, rgba(255, 255, 255, 0.08) 1px, transparent 1px),
    linear-gradient(rgba(255, 255, 255, 0.08) 1px, transparent 1px);
  background-size: 34px 34px;
}

.traffic-map::before,
.traffic-map::after {
  content: "";
  position: absolute;
  inset: 50% 18px auto 18px;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(103, 232, 249, 0.72), transparent);
}

.traffic-map::after {
  inset: 18px auto 18px 50%;
  width: 1px;
  height: auto;
}

.node {
  position: relative;
  z-index: 1;
  display: grid;
  place-items: center;
  min-height: 64px;
  border: 1px solid rgba(255, 255, 255, 0.16);
  border-radius: 8px;
  background: rgba(7, 17, 30, 0.76);
  color: rgba(238, 246, 248, 0.8);
  font-size: 13px;
  font-weight: 800;
}

.node.active {
  grid-column: 1 / -1;
  border-color: rgba(103, 232, 249, 0.55);
  background: rgba(8, 145, 178, 0.2);
  color: #ffffff;
}

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

.metric-grid div {
  padding: 14px;
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.08);
}

.metric-grid strong {
  display: block;
  margin-top: 6px;
  color: #ffffff;
}

.signal-list {
  display: grid;
  grid-template-columns: 1.4fr 0.8fr 1.1fr 0.7fr;
  gap: 8px;
  margin-top: 20px;
}

.signal-list span {
  height: 8px;
  border-radius: 8px;
  background: #67e8f9;
}

.signal-list span:nth-child(2) {
  background: #86efac;
}

.signal-list span:nth-child(3) {
  background: #fbbf24;
}

.signal-list span:nth-child(4) {
  background: #fb7185;
}

.panel-note {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 8px;
  margin-top: 20px;
}

.panel-note span {
  display: grid;
  place-items: center;
  min-height: 34px;
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.07);
  color: rgba(238, 246, 248, 0.78);
  font-size: 12px;
  font-weight: 800;
}

.trust-band {
  position: relative;
  z-index: 5;
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 1px;
  width: min(1180px, calc(100% - 40px));
  margin: -36px auto 0;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--line);
  box-shadow: var(--shadow);
}

.trust-band span {
  display: grid;
  place-items: center;
  min-height: 72px;
  padding: 14px;
  background: #ffffff;
  color: #273244;
  font-size: 15px;
  font-weight: 900;
  text-align: center;
}

.section {
  width: min(1180px, calc(100% - 40px));
  margin: 0 auto;
  padding: 96px 0;
}

.section-heading {
  max-width: 760px;
  margin-bottom: 34px;
}

.section-heading.centered {
  margin-inline: auto;
  text-align: center;
}

.section-heading h2,
.final-cta h2 {
  margin-bottom: 14px;
  font-size: clamp(30px, 4vw, 48px);
  line-height: 1.16;
  letter-spacing: 0;
}

.section-heading p:not(.eyebrow),
.intro-layout p,
.scenario-copy p,
.final-cta p,
.faq-list p,
.delivery-grid p,
.process-track p,
.plan-summary {
  color: var(--muted);
  line-height: 1.8;
}

.intro-section {
  padding-bottom: 54px;
}

.intro-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(280px, 460px);
  gap: 34px;
  align-items: start;
}

.intro-layout > p {
  margin: 0;
  font-size: 19px;
}

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

.capability-strip span {
  padding: 10px 13px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #ffffff;
  color: #253041;
  font-weight: 800;
}

.models-section {
  padding-top: 72px;
}

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

.model-grid article,
.advantage-grid article {
  min-height: 220px;
  padding: 24px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #ffffff;
  box-shadow: 0 12px 34px rgba(15, 23, 42, 0.05);
}

.model-grid article {
  position: relative;
  overflow: hidden;
}

.model-grid article::after {
  content: "";
  position: absolute;
  inset: auto 0 0;
  height: 4px;
  background: linear-gradient(90deg, var(--teal), var(--cyan));
}

.model-grid span {
  display: inline-flex;
  align-items: center;
  min-height: 30px;
  margin-bottom: 42px;
  padding: 0 10px;
  border-radius: 8px;
  background: #eef5f6;
  color: #0f766e;
  font-size: 12px;
  font-weight: 900;
}

.model-grid h3,
.advantage-grid strong,
.contact-grid h3 {
  display: block;
  margin-bottom: 10px;
  color: var(--ink);
  font-size: 20px;
}

.model-grid p,
.advantage-grid p,
.contact-copy p,
.contact-grid p {
  margin: 0;
  color: var(--muted);
  line-height: 1.8;
}

.contact-link {
  display: inline-flex;
  grid-column: 2;
  align-items: center;
  justify-content: center;
  width: fit-content;
  min-height: 36px;
  margin-top: 14px;
  padding: 0 14px;
  border-radius: 8px;
  background: #e6fffb;
  color: #0f766e;
  font-size: 14px;
  font-weight: 900;
  transition:
    background 0.2s ease,
    transform 0.2s ease;
}

.contact-link:hover {
  background: #ccfbf1;
  transform: translateY(-1px);
}

.plans-section {
  width: min(1240px, calc(100% - 40px));
}

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

.plan-card {
  position: relative;
  display: flex;
  flex-direction: column;
  min-height: 460px;
  padding: 28px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #ffffff;
  box-shadow: 0 12px 34px rgba(15, 23, 42, 0.06);
}

.plan-card.highlighted {
  color: #ffffff;
  background:
    linear-gradient(135deg, rgba(7, 17, 30, 0.96), rgba(15, 118, 110, 0.92)),
    #07111e;
  border-color: rgba(15, 118, 110, 0.8);
  box-shadow: var(--shadow);
}

.plan-card.is-active:not(.highlighted),
.plan-card:hover:not(.highlighted) {
  border-color: rgba(15, 118, 110, 0.42);
  box-shadow: 0 24px 58px rgba(15, 23, 42, 0.1);
}

.plan-card.highlighted .plan-summary,
.plan-card.highlighted li {
  color: rgba(238, 246, 248, 0.78);
}

.plan-badge {
  align-self: flex-start;
  margin-bottom: 16px;
  padding: 7px 10px;
  border-radius: 8px;
  background: #fbbf24;
  color: #1f2937;
  font-size: 12px;
  font-weight: 900;
}

.plan-head {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  align-items: end;
  margin-bottom: 18px;
}

.plan-tier {
  font-size: 22px;
  font-weight: 900;
}

.plan-head strong {
  font-size: clamp(38px, 5vw, 54px);
  line-height: 0.95;
}

.plan-head strong small {
  margin-right: 8px;
  color: inherit;
  font-size: 16px;
  font-weight: 900;
  opacity: 0.72;
  vertical-align: middle;
}

.plan-summary {
  min-height: 88px;
  margin-bottom: 18px;
}

.plan-card ul {
  display: grid;
  gap: 13px;
  margin: 0 0 26px;
  padding: 0;
  list-style: none;
}

.plan-card li {
  position: relative;
  padding-left: 22px;
  color: #364152;
  line-height: 1.6;
}

.plan-card li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.68em;
  width: 8px;
  height: 8px;
  border-radius: 3px;
  background: var(--teal);
}

.plan-card.highlighted li::before {
  background: #67e8f9;
}

.plan-button {
  margin-top: auto;
  border: 1px solid var(--line);
  color: #101827;
  background: #ffffff;
}

.plan-button.dark {
  border-color: #e6fffb;
  background: #e6fffb;
  color: #0b4f4a;
}

.compare-shell {
  margin-top: 26px;
  padding: 28px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #ffffff;
  box-shadow: 0 12px 34px rgba(15, 23, 42, 0.06);
}

.compare-heading {
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 20px;
}

.compare-heading h3 {
  margin: 0;
  font-size: 24px;
}

.compare-heading p {
  margin: 0;
  color: var(--muted);
}

.compare-table {
  display: grid;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 8px;
}

.compare-row {
  display: grid;
  grid-template-columns: 1.2fr repeat(3, 1fr);
}

.compare-row span {
  min-width: 0;
  padding: 16px;
  border-right: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  line-height: 1.5;
  word-break: keep-all;
}

.compare-row span:last-child {
  border-right: 0;
}

.compare-row:last-child span {
  border-bottom: 0;
}

.header-row span {
  background: #eef5f6;
  color: #1f2937;
  font-weight: 900;
}

.terms-section {
  padding-top: 20px;
  padding-bottom: 82px;
}

.terms-box {
  position: relative;
  display: grid;
  grid-template-columns: 210px minmax(0, 1fr);
  gap: 28px;
  overflow: hidden;
  padding: 30px;
  border: 1px solid rgba(190, 18, 60, 0.28);
  border-radius: 8px;
  background:
    linear-gradient(135deg, rgba(255, 241, 242, 0.96), rgba(255, 255, 255, 0.98)),
    #ffffff;
  box-shadow: 0 22px 58px rgba(15, 23, 42, 0.1);
}

.terms-box::before {
  content: "";
  position: absolute;
  inset: 0 auto 0 0;
  width: 6px;
  background: linear-gradient(180deg, #be123c, #d97706);
}

.terms-label {
  display: grid;
  place-items: center;
  align-self: start;
  min-height: 58px;
  padding: 0 18px;
  border-radius: 8px;
  background: #be123c;
  color: #ffffff;
  font-size: 16px;
  font-weight: 900;
  text-align: center;
}

.terms-content h2 {
  margin-bottom: 12px;
  color: #881337;
  font-size: clamp(26px, 3vw, 38px);
  line-height: 1.18;
}

.terms-content > p {
  max-width: 920px;
  margin-bottom: 20px;
  color: #4b5563;
  font-size: 17px;
  line-height: 1.85;
}

.terms-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
}

.terms-grid div {
  min-height: 138px;
  padding: 18px;
  border: 1px solid rgba(190, 18, 60, 0.16);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.78);
}

.terms-grid strong {
  display: block;
  margin-bottom: 10px;
  color: #111827;
  font-size: 17px;
}

.terms-grid span {
  display: block;
  color: #5b6472;
  line-height: 1.75;
}

.delivery-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 18px;
}

.delivery-grid article {
  min-height: 260px;
  padding: 24px;
  border-top: 4px solid var(--teal);
  border-radius: 8px;
  background: #ffffff;
  box-shadow: 0 12px 34px rgba(15, 23, 42, 0.06);
}

.delivery-grid article:nth-child(2) {
  border-color: var(--cyan);
}

.delivery-grid article:nth-child(3) {
  border-color: var(--amber);
}

.delivery-grid article:nth-child(4) {
  border-color: var(--red);
}

.feature-index {
  display: block;
  margin-bottom: 46px;
  color: #9aa5b1;
  font-size: 13px;
  font-weight: 900;
}

.delivery-grid h3,
.process-track h3,
.operation-grid h3 {
  margin-bottom: 10px;
  font-size: 20px;
}

.operation-section {
  display: grid;
  grid-template-columns: minmax(300px, 430px) minmax(0, 1fr);
  gap: clamp(32px, 5vw, 68px);
  align-items: start;
}

.operation-copy {
  position: sticky;
  top: 96px;
}

.operation-copy h2 {
  margin-bottom: 16px;
  font-size: clamp(30px, 4vw, 48px);
  line-height: 1.16;
}

.operation-copy p:not(.eyebrow),
.operation-grid p {
  color: var(--muted);
  line-height: 1.8;
}

.operation-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
}

.operation-grid article {
  min-height: 190px;
  padding: 24px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #ffffff;
  box-shadow: 0 12px 34px rgba(15, 23, 42, 0.05);
}

.operation-grid article::before {
  content: "";
  display: block;
  width: 36px;
  height: 5px;
  margin-bottom: 42px;
  border-radius: 8px;
  background: var(--teal);
}

.operation-grid article:nth-child(2)::before {
  background: var(--cyan);
}

.operation-grid article:nth-child(3)::before {
  background: var(--amber);
}

.operation-grid article:nth-child(4)::before {
  background: var(--red);
}

.advantages-section {
  width: min(1240px, calc(100% - 40px));
}

.advantage-grid article {
  position: relative;
  overflow: hidden;
  min-height: 198px;
  transition:
    transform 0.2s ease,
    border-color 0.2s ease,
    box-shadow 0.2s ease;
}

.advantage-grid article::before {
  content: "";
  position: absolute;
  inset: 0 0 auto;
  height: 4px;
  background: linear-gradient(90deg, var(--teal), var(--cyan));
  opacity: 0.86;
}

.advantage-grid article:hover {
  transform: translateY(-3px);
  border-color: rgba(15, 118, 110, 0.36);
  box-shadow: 0 22px 52px rgba(15, 23, 42, 0.1);
}

.advantage-icon {
  position: relative;
  display: grid;
  place-items: center;
  width: 58px;
  height: 58px;
  margin-bottom: 34px;
  border: 1px solid #cfe3e5;
  border-radius: 8px;
  color: #0f766e;
  background:
    linear-gradient(135deg, rgba(230, 255, 251, 0.96), rgba(236, 253, 245, 0.72)),
    #ffffff;
  box-shadow:
    inset 0 0 0 1px rgba(255, 255, 255, 0.8),
    0 14px 28px rgba(15, 118, 110, 0.12);
}

.advantage-icon::after {
  content: "";
  position: absolute;
  right: -6px;
  bottom: -6px;
  width: 18px;
  height: 18px;
  border-radius: 6px;
  background: #0891b2;
  box-shadow: 0 8px 18px rgba(8, 145, 178, 0.24);
}

.advantage-icon svg {
  position: relative;
  z-index: 1;
  width: 28px;
  height: 28px;
  fill: none;
  stroke: currentColor;
  stroke-width: 1.8;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.advantage-grid article:nth-child(2) .advantage-icon {
  color: #0891b2;
}

.advantage-grid article:nth-child(3) .advantage-icon {
  color: #d97706;
  border-color: #f4d7a8;
  background: linear-gradient(135deg, rgba(255, 251, 235, 0.98), rgba(236, 253, 245, 0.62));
}

.advantage-grid article:nth-child(4) .advantage-icon {
  color: #0f766e;
}

.advantage-grid article:nth-child(5) .advantage-icon {
  color: #4f46e5;
  border-color: #d8dcff;
  background: linear-gradient(135deg, rgba(238, 242, 255, 0.98), rgba(230, 255, 251, 0.62));
}

.advantage-grid article:nth-child(6) .advantage-icon {
  color: #be123c;
  border-color: #ffd3dd;
  background: linear-gradient(135deg, rgba(255, 241, 242, 0.98), rgba(236, 253, 245, 0.62));
}

.scenario-section {
  display: grid;
  grid-template-columns: minmax(320px, 520px) minmax(0, 1fr);
  gap: clamp(38px, 6vw, 86px);
  align-items: center;
}

.scenario-visual {
  position: relative;
  min-height: 420px;
  border: 1px solid #cfd8e3;
  border-radius: 8px;
  background:
    linear-gradient(90deg, rgba(15, 23, 42, 0.08) 1px, transparent 1px),
    linear-gradient(rgba(15, 23, 42, 0.08) 1px, transparent 1px),
    #ffffff;
  background-size: 42px 42px;
  box-shadow: var(--shadow);
}

.stack-block {
  position: absolute;
  display: grid;
  place-items: center;
  min-width: 132px;
  min-height: 58px;
  padding: 0 18px;
  border-radius: 8px;
  color: #ffffff;
  font-weight: 900;
  box-shadow: 0 16px 30px rgba(15, 23, 42, 0.16);
}

.block-a {
  left: 32px;
  top: 44px;
  background: #0f766e;
}

.block-b {
  right: 34px;
  top: 118px;
  background: #111827;
}

.block-c {
  left: 76px;
  bottom: 118px;
  background: #0891b2;
}

.block-d {
  right: 58px;
  bottom: 42px;
  background: #d97706;
}

.stack-line {
  position: absolute;
  height: 2px;
  background: #94a3b8;
  transform-origin: left center;
}

.line-a {
  left: 160px;
  top: 118px;
  width: 178px;
  transform: rotate(18deg);
}

.line-b {
  left: 188px;
  top: 232px;
  width: 176px;
  transform: rotate(-19deg);
}

.line-c {
  right: 142px;
  bottom: 102px;
  width: 148px;
  transform: rotate(16deg);
}

.scenario-copy h2 {
  font-size: clamp(30px, 4vw, 48px);
  line-height: 1.16;
}

.scenario-list {
  display: grid;
  gap: 14px;
  margin-top: 26px;
}

.scenario-list p {
  margin: 0;
  padding: 18px 20px;
  border-left: 4px solid var(--teal);
  border-radius: 8px;
  background: #ffffff;
  box-shadow: 0 12px 34px rgba(15, 23, 42, 0.05);
}

.process-track {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 18px;
}

.process-track article {
  position: relative;
  min-height: 236px;
  padding: 24px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #ffffff;
}

.process-track span {
  display: grid;
  place-items: center;
  width: 42px;
  height: 42px;
  margin-bottom: 46px;
  border-radius: 8px;
  background: #0f766e;
  color: #ffffff;
  font-weight: 900;
}

.faq-section {
  display: grid;
  grid-template-columns: minmax(260px, 420px) minmax(0, 1fr);
  gap: 50px;
}

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

details {
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #ffffff;
}

summary {
  cursor: pointer;
  padding: 20px 22px;
  font-size: 18px;
  font-weight: 900;
}

details p {
  margin: 0;
  padding: 0 22px 22px;
}

.contact-section {
  display: grid;
  grid-template-columns: minmax(300px, 430px) minmax(0, 1fr);
  gap: clamp(34px, 5vw, 72px);
  align-items: start;
}

.contact-copy h2 {
  margin-bottom: 16px;
  font-size: clamp(30px, 4vw, 48px);
  line-height: 1.16;
}

.compliance-note {
  margin-top: 24px;
  padding: 18px 20px;
  border-left: 4px solid var(--teal);
  border-radius: 8px;
  background: #ffffff;
  box-shadow: 0 12px 34px rgba(15, 23, 42, 0.05);
}

.contact-grid {
  display: grid;
  gap: 14px;
}

.contact-grid article {
  display: grid;
  grid-template-columns: 58px minmax(0, 1fr);
  column-gap: 18px;
  align-items: start;
  min-height: 132px;
  padding: 22px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #ffffff;
  box-shadow: 0 12px 34px rgba(15, 23, 42, 0.05);
}

.contact-grid span {
  display: grid;
  grid-row: span 2;
  place-items: center;
  width: 48px;
  height: 48px;
  border-radius: 8px;
  background: #0f766e;
  color: #ffffff;
  font-weight: 900;
}

.final-cta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 28px;
  width: min(1180px, calc(100% - 40px));
  margin: 40px auto 0;
  padding: clamp(36px, 5vw, 58px);
  border-radius: 8px;
  color: #ffffff;
  background:
    linear-gradient(135deg, rgba(7, 17, 30, 0.96), rgba(10, 72, 74, 0.94)),
    #07111e;
}

.final-cta div {
  max-width: 760px;
}

.final-cta p {
  margin-bottom: 0;
  color: rgba(238, 246, 248, 0.78);
}

.primary-button.light {
  flex: 0 0 auto;
  background: #ffffff;
  color: #0b4f4a;
}

.wechat-float {
  position: fixed;
  z-index: 40;
  top: 50%;
  right: 22px;
  width: 226px;
  padding: 16px;
  border: 1px solid rgba(15, 118, 110, 0.24);
  border-radius: 8px;
  color: #122033;
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.98), rgba(247, 252, 252, 0.96)),
    #ffffff;
  box-shadow: 0 24px 70px rgba(15, 23, 42, 0.18);
  transform: translateY(-50%);
  transition:
    border-color 0.2s ease,
    box-shadow 0.2s ease;
  will-change: top;
}

.wechat-float:hover {
  border-color: rgba(15, 118, 110, 0.48);
  box-shadow: 0 28px 80px rgba(15, 23, 42, 0.22);
}

.wechat-float__top {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 14px;
}

.wechat-float__mark {
  display: grid;
  place-items: center;
  flex: 0 0 auto;
  width: 38px;
  height: 38px;
  border-radius: 8px;
  background: #0f766e;
  color: #ffffff;
  font-weight: 900;
}

.wechat-float strong,
.wechat-float small {
  display: block;
}

.wechat-float strong {
  margin-bottom: 2px;
  font-size: 15px;
}

.wechat-float small {
  color: #64748b;
  font-size: 12px;
}

.wechat-qr {
  display: grid;
  place-items: center;
  min-height: 154px;
  margin-bottom: 12px;
  border: 1px solid #d8e5eb;
  border-radius: 8px;
  background:
    linear-gradient(90deg, rgba(15, 118, 110, 0.07) 1px, transparent 1px),
    linear-gradient(rgba(15, 118, 110, 0.07) 1px, transparent 1px),
    #ffffff;
  background-size: 18px 18px;
}

.wechat-qr img {
  display: block;
  width: 124px;
  height: 124px;
  margin-bottom: 8px;
  border-radius: 6px;
  background: #ffffff;
  object-fit: contain;
}

.wechat-qr__grid {
  display: grid;
  grid-template-columns: repeat(4, 16px);
  gap: 7px;
  margin-bottom: 8px;
}

.wechat-qr__grid span {
  width: 16px;
  height: 16px;
  border-radius: 4px;
  background: #0f766e;
}

.wechat-qr__grid span:nth-child(3n) {
  background: #0891b2;
}

.wechat-qr__grid span:nth-child(4n) {
  opacity: 0.28;
}

.wechat-qr em {
  color: #64748b;
  font-size: 12px;
  font-style: normal;
  font-weight: 800;
}

.wechat-float p {
  margin: 0 0 12px;
  color: #516070;
  font-size: 13px;
  line-height: 1.7;
}

.wechat-action {
  display: grid;
  place-items: center;
  min-height: 40px;
  border-radius: 8px;
  background: #0f766e;
  color: #ffffff;
  font-size: 14px;
  font-weight: 900;
  transition:
    background 0.2s ease,
    transform 0.2s ease;
}

.wechat-action:hover {
  background: #0b5f59;
  transform: translateY(-1px);
}

.site-footer {
  justify-content: space-between;
  width: min(1180px, calc(100% - 40px));
  margin: 0 auto;
  padding: 34px 0;
  color: #6b7280;
  font-size: 14px;
}

@media (max-width: 980px) {
  .wechat-float {
    right: 14px;
    width: 202px;
  }

  .site-header {
    gap: 16px;
  }

  .brand {
    min-width: auto;
  }

  .brand-text {
    display: none;
  }

  .main-nav {
    justify-content: flex-start;
    overflow-x: auto;
    padding: 4px 0;
  }

  .hero-inner,
  .intro-layout,
  .operation-section,
  .contact-section,
  .scenario-section,
  .faq-section {
    grid-template-columns: 1fr;
  }

  .operation-copy {
    position: static;
  }

  .hero-inner {
    padding-top: 110px;
  }

  .command-panel {
    min-height: auto;
  }

  .plan-grid,
  .delivery-grid,
  .model-grid,
  .advantage-grid,
  .terms-grid,
  .trust-band,
  .process-track {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .terms-box {
    grid-template-columns: 1fr;
  }

  .terms-label {
    justify-self: start;
  }

  .plan-summary {
    min-height: auto;
  }
}

@media (max-width: 680px) {
  .wechat-float {
    top: auto !important;
    right: 14px;
    bottom: 14px;
    left: 14px;
    display: flex;
    flex-direction: column;
    gap: 10px;
    width: auto;
    padding: 12px;
    transform: none;
  }

  .wechat-float__top {
    margin: 0;
    min-width: 0;
  }

  .wechat-float__top div {
    min-width: 0;
  }

  .wechat-float__mark {
    width: 34px;
    height: 34px;
  }

  .wechat-float strong {
    font-size: 14px;
  }

  .wechat-float small {
    overflow: hidden;
    font-size: 11px;
    text-overflow: ellipsis;
    white-space: nowrap;
  }

  .wechat-qr {
    display: none;
  }

  .wechat-float p {
    display: none;
  }

  .wechat-action {
    width: 100%;
    min-width: 0;
    min-height: 38px;
    padding: 0 8px;
    white-space: nowrap;
  }

  .site-header {
    min-height: 64px;
    padding: 0 14px;
    gap: 10px;
  }

  .main-nav {
    display: none;
  }

  .nav-action {
    display: none;
  }

  .hero,
  .hero-inner {
    min-height: auto;
  }

  .hero-inner {
    width: calc(100vw - 28px);
    max-width: calc(100vw - 28px);
    padding: 102px 0 52px;
  }

  .hero-copy,
  .hero-lede,
  .command-panel {
    max-width: calc(100vw - 28px);
  }

  h1 {
    font-size: 38px;
  }

  .hero-stats div {
    flex: 1 1 150px;
    min-width: 0;
  }

  .hero-stats {
    display: grid;
    grid-template-columns: 1fr;
  }

  .command-panel {
    width: 100%;
    max-width: 100%;
    overflow: hidden;
    padding: 18px;
  }

  .panel-top {
    align-items: flex-start;
    flex-direction: column;
  }

  .traffic-map {
    grid-template-columns: 1fr;
  }

  .metric-grid,
  .panel-note {
    grid-template-columns: 1fr;
  }

  .section,
  .plans-section,
  .advantages-section,
  .trust-band,
  .final-cta,
  .site-footer {
    width: min(100% - 28px, 1180px);
  }

  .section {
    padding: 68px 0;
  }

  .plan-grid,
  .delivery-grid,
  .operation-grid,
  .model-grid,
  .advantage-grid,
  .terms-grid,
  .trust-band,
  .process-track {
    grid-template-columns: 1fr;
  }

  .terms-section {
    padding-top: 0;
    padding-bottom: 60px;
  }

  .terms-box {
    padding: 24px 20px;
  }

  .contact-grid article {
    grid-template-columns: 1fr;
  }

  .contact-grid span {
    grid-row: auto;
    margin-bottom: 18px;
  }

  .contact-link {
    grid-column: auto;
  }

  .compare-shell {
    padding: 16px;
  }

  .compare-heading,
  .final-cta,
  .site-footer {
    align-items: flex-start;
    flex-direction: column;
  }

  .compare-table {
    overflow-x: auto;
  }

  .compare-row {
    min-width: 640px;
  }

  .scenario-visual {
    min-height: 360px;
  }

  .stack-block {
    min-width: 112px;
    min-height: 52px;
    font-size: 13px;
  }

  .block-a {
    left: 18px;
  }

  .block-b {
    right: 18px;
  }

  .block-c {
    left: 28px;
  }

  .block-d {
    right: 24px;
  }
}

@media (max-width: 520px) {
  .hero-inner,
  .section,
  .plans-section,
  .advantages-section,
  .terms-section,
  .trust-band,
  .final-cta,
  .site-footer {
    width: min(362px, calc(100vw - 28px));
    max-width: min(362px, calc(100vw - 28px));
    margin-left: 14px;
    margin-right: 14px;
  }

  .hero-copy,
  .hero-lede,
  .command-panel {
    max-width: min(362px, calc(100vw - 28px));
  }
}