:root {
  color-scheme: light;
  --ink: #0b172a;
  --ink-soft: #536276;
  --blue: #0866ff;
  --blue-deep: #054ec4;
  --blue-pale: #eaf2ff;
  --surface: #ffffff;
  --page: #f5f8fc;
  --line: #dce5f0;
  --navy: #07152b;
  --cyan: #21c7d9;
  --success: #0b7a53;
  --radius: 8px;
  --shadow: 0 18px 50px rgba(31, 73, 125, .12);
  --container: 1200px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--page);
  font-family: "PingFang SC", "Microsoft YaHei", system-ui, sans-serif;
  font-size: 16px;
  line-height: 1.65;
  letter-spacing: 0;
  overflow-x: hidden;
}

main {
  color: var(--ink);
}

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

button,
input,
select,
textarea {
  font: inherit;
}

main img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.container {
  width: min(calc(100% - 48px), var(--container));
  margin-inline: auto;
}

main .container::before,
main .container::after {
  display: none;
}

.skip-link {
  position: fixed;
  left: 16px;
  top: -60px;
  z-index: 100;
  background: var(--navy);
  color: white;
  padding: 10px 14px;
  border-radius: 6px;
}

.skip-link:focus {
  top: 16px;
}

.nav {
  position: sticky;
  top: 0;
  z-index: 30;
  height: 72px;
  background: rgba(255, 255, 255, .94);
  border-bottom: 1px solid rgba(220, 229, 240, .9);
  backdrop-filter: blur(14px);
}

.nav-inner {
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  font-weight: 750;
  white-space: nowrap;
}

.brand-mark {
  width: 32px;
  height: 32px;
  border-radius: 7px;
  background: var(--blue);
  display: grid;
  place-items: center;
  color: white;
  font: 700 15px/1 ui-monospace, monospace;
  box-shadow: inset 0 0 0 1px rgba(255, 255, 255, .28);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 30px;
  color: #3b4d64;
  font-size: 14px;
}

.nav-links a:hover {
  color: var(--blue);
}

.button {
  min-height: 46px;
  padding: 0 20px;
  border: 1px solid transparent;
  border-radius: var(--radius);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 9px;
  font-weight: 650;
  cursor: pointer;
  white-space: nowrap;
  transition: transform .2s ease, background .2s ease, border-color .2s ease, box-shadow .2s ease;
}

.button:active {
  transform: scale(.98);
}

main .button:focus-visible,
main a:focus-visible,
main input:focus-visible,
main select:focus-visible,
main textarea:focus-visible {
  outline: 3px solid rgba(8, 102, 255, .28);
  outline-offset: 3px;
}

.button-primary {
  color: white;
  background: var(--blue-deep);
  box-shadow: 0 10px 24px rgba(8, 102, 255, .2);
}

.button-primary:hover {
  background: #0343aa;
  transform: translateY(-1px);
}

.button-secondary {
  color: var(--ink);
  background: white;
  border-color: #c7d4e4;
}

.button-secondary:hover {
  border-color: var(--blue);
  color: var(--blue);
}

.button-compact {
  min-height: 42px;
  padding-inline: 16px;
  font-size: 14px;
}

.arrow {
  font-size: 18px;
  line-height: 1;
}

.hero {
  min-height: calc(100dvh - 72px);
  display: flex;
  align-items: center;
  position: relative;
  overflow: hidden;
  background: linear-gradient(120deg, #f8fbff 0%, #f2f7ff 56%, #e9f2ff 100%);
  border-bottom: 1px solid var(--line);
}

.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  opacity: .55;
  background-image: linear-gradient(rgba(8, 102, 255, .06) 1px, transparent 1px), linear-gradient(90deg, rgba(8, 102, 255, .06) 1px, transparent 1px);
  background-size: 56px 56px;
  mask-image: linear-gradient(to right, black, transparent 78%);
  pointer-events: none;
}

.hero-grid {
  position: relative;
  display: grid;
  grid-template-columns: .95fr 1.05fr;
  gap: 78px;
  align-items: center;
  padding: 0;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  padding: 6px 10px;
  border: 1px solid #b9d0f5;
  border-radius: 5px;
  color: var(--blue-deep);
  background: rgba(255, 255, 255, .72);
  font-size: 12px;
  font-weight: 700;
}

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

main h1 {
  margin: 22px 0 24px;
  max-width: 620px;
  font-size: clamp(44px, 5vw, 68px);
  line-height: 1.08;
  letter-spacing: 0;
}

main h1 strong {
  color: var(--blue);
  font-weight: 780;
}

.hero-copy>p {
  max-width: 570px;
  margin-bottom: 30px;
  color: var(--ink-soft);
  font-size: 18px;
}

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

.hero-visual {
  position: relative;
  min-height: 560px;
}

.photo-shell {
  position: absolute;
  inset: 14px 0 42px 52px;
  overflow: hidden;
  border-radius: var(--radius);
  background: #bed2ea;
  box-shadow: var(--shadow);
}

.photo-shell::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(7, 21, 43, .02), rgba(7, 21, 43, .32));
}

.signal-panel {
  position: absolute;
  left: 0;
  bottom: 0;
  width: 250px;
  padding: 22px;
  color: white;
  background: var(--navy);
  border-radius: var(--radius);
  box-shadow: 0 20px 48px rgba(7, 21, 43, .24);
}

.signal-panel span {
  color: #a9c5ea;
  font-size: 12px;
}

.signal-panel strong {
  display: block;
  margin: 5px 0 10px;
  font-size: 28px;
  line-height: 1.2;
}

.signal-line {
  height: 3px;
  margin-top: 18px;
  background: linear-gradient(90deg, var(--cyan) 0 44%, var(--blue) 44% 72%, rgba(255, 255, 255, .16) 72%);
}

.ai-chip {
  position: absolute;
  right: -18px;
  top: 0;
  width: 150px;
  padding: 18px;
  color: var(--navy);
  background: white;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

.ai-chip svg {
  color: var(--blue);
}

.ai-chip strong {
  display: block;
  margin-top: 12px;
  line-height: 1.35;
}

.proof {
  background: white;
  border-bottom: 1px solid var(--line);
}

.proof-grid {
  display: grid;
  grid-template-columns: 1.3fr repeat(3, 1fr);
  align-items: stretch;
}

.proof-intro,
.proof-item {
  padding: 28px 30px;
  border-right: 1px solid var(--line);
}

.proof-item:last-child {
  border-right: 0;
}

.proof-intro {
  padding-left: 0;
  font-weight: 700;
}

.proof-item strong {
  display: block;
  font-size: 16px;
}

.proof-item span {
  color: var(--ink-soft);
  font-size: 13px;
}

section {
  padding: 112px 0 60px 0;
}

.section-head {
  max-width: 720px;
  margin-bottom: 54px;
}

main h2 {
  margin-bottom: 18px;
  font-size: clamp(34px, 4vw, 52px);
  line-height: 1.16;
  letter-spacing: 0;
}

.section-head p {
  color: var(--ink-soft);
  font-size: 17px;
  max-width: 650px;
}

.bridge {
  background: var(--navy);
  color: white;
  overflow: hidden;
}

.bridge-grid {
  display: grid;
  grid-template-columns: .92fr 1.08fr;
  align-items: center;
  gap: 80px;
}

.bridge h2 {
  max-width: 520px;
}

.bridge-copy p {
  color: #abc0dc;
  max-width: 540px;
}

.bridge-diagram {
  position: relative;
  min-height: 420px;
  display: grid;
  place-items: center;
}

.orbit {
  position: absolute;
  border: 1px solid rgba(90, 153, 237, .3);
  border-radius: 50%;
}

.orbit-one {
  width: 400px;
  height: 400px;
}

.orbit-two {
  width: 270px;
  height: 270px;
}

.core {
  position: relative;
  width: 174px;
  height: 174px;
  border-radius: 50%;
  background: var(--blue);
  display: grid;
  place-items: center;
  text-align: center;
  font-weight: 750;
  box-shadow: inset 0 0 0 10px rgba(255, 255, 255, .08);
}

.node {
  position: absolute;
  width: 126px;
  padding: 15px;
  border: 1px solid rgba(169, 197, 234, .32);
  border-radius: var(--radius);
  background: #0b2345;
  color: white;
  text-align: center;
  font-size: 14px;
}

.node:nth-of-type(1) {
  top: 16px;
  left: 32px;
}

.node:nth-of-type(2) {
  top: 56px;
  right: 0;
}

.node:nth-of-type(3) {
  bottom: 18px;
  right: 70px;
}

.node:nth-of-type(4) {
  bottom: 50px;
  left: 0;
}

.audience {
  background: white;
}

.audience-list {
  display: grid;
  grid-template-columns: 1.15fr .85fr;
  border-top: 1px solid var(--line);
}

.audience-row {
  display: grid;
  grid-template-columns: 64px 1fr;
  gap: 22px;
  padding: 32px 0;
  border-bottom: 1px solid var(--line);
}

.audience-row:nth-child(2) {
  grid-column: 1;
}

.audience-row:nth-child(3) {
  grid-column: 1;
}

.audience-icon {
  width: 48px;
  height: 48px;
  display: grid;
  place-items: center;
  color: var(--blue);
  background: var(--blue-pale);
  border-radius: 7px;
}

.audience-row h3 {
  margin: 0 0 7px;
  font-size: 21px;
}

.audience-row p {
  margin: 0;
  color: var(--ink-soft);
}

.audience-photo {
  grid-column: 2;
  grid-row: 1 / span 3;
  margin-left: 60px;
  overflow: hidden;
  border-radius: var(--radius);
  min-height: 520px;
}

.support {
  background: #eef4fb;
}

.support-grid {
  display: grid;
  grid-template-columns: 1.2fr .8fr;
  grid-template-rows: 1fr 1fr;
  gap: 18px;
}

.support-card {
  position: relative;
  min-height: 250px;
  padding: 34px;
  background: white;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
}

.support-card:first-child {
  grid-row: 1 / span 2;
  min-height: 520px;
  background: var(--blue);
  color: white;
  border-color: var(--blue);
}

.support-card:first-child p {
  color: #dce9ff;
}

.support-number {
  font: 700 12px/1 ui-monospace, monospace;
  color: var(--blue);
}

.support-card:first-child .support-number {
  color: #b9d6ff;
}

.support-card h3 {
  margin: 54px 0 12px;
  font-size: 29px;
  line-height: 1.2;
}

.support-card p {
  color: var(--ink-soft);
  max-width: 470px;
}

.support-list {
  margin: 32px 0 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 16px;
}

.support-list li {
  display: grid;
  grid-template-columns: 92px 1fr;
  gap: 20px;
  align-items: baseline;
  padding-top: 16px;
  border-top: 1px solid rgba(255, 255, 255, .2);
}

.support-list strong {
  font-size: 22px;
}

.support-list span {
  color: #dce9ff;
  font-size: 14px;
}

.policy {
  background: white;
}

.policy-strip {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
}

.policy-item {
  min-height: 250px;
  padding: 32px;
  background: white;
}

.policy-item svg {
  color: var(--blue);
}

.policy-item h3 {
  margin: 48px 0 10px;
  font-size: 22px;
}

.policy-item p {
  margin: 0;
  color: var(--ink-soft);
}

.process {
  background: var(--navy);
  color: white;
}

.process .section-head p {
  color: #abc0dc;
}

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

.process-step {
  position: relative;
  padding: 26px 38px 26px 0;
  border-top: 1px solid #2b4669;
}

.process-step::before {
  content: "";
  position: absolute;
  width: 10px;
  height: 10px;
  top: -6px;
  left: 0;
  background: var(--cyan);
  border-radius: 50%;
  box-shadow: 0 0 0 6px var(--navy);
}

.process-step:not(:last-child)::after {
  content: "";
  position: absolute;
  right: 18px;
  top: 52px;
  width: 24px;
  height: 1px;
  background: #365477;
}

.process-step h3 {
  margin: 24px 0 8px;
  font-size: 20px;
}

.process-step p {
  margin: 0;
  color: #aebfd4;
  font-size: 14px;
}

.contact {
  height: fit-content;
  padding: 96px 0;
  background: linear-gradient(120deg, #eaf2ff, #f7fbff);
}

.contact-grid {
  display: grid;
  grid-template-columns: .82fr 1.18fr;
  gap: 70px;
  align-items: start;
}

.contact-copy {
  padding-top: 28px;
}

.contact-copy p {
  color: var(--ink-soft);
  max-width: 490px;
}

main .phone {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  margin-top: 22px;
  color: var(--blue-deep);
  font-size: 24px;
  font-weight: 750;
}

.form {
  padding: 36px;
  background: white;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

.form-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
}

.field {
  display: grid;
  gap: 8px;
}

.field-full {
  grid-column: 1 / -1;
}

main label {
  font-size: 14px;
  font-weight: 650;
}

.req {
  color: #e2342f;
}

main input,
main select,
main textarea {
  width: 100%;
  min-height: 48px;
  border: 1px solid #b9c7d8;
  border-radius: 7px;
  background: white;
  color: var(--ink);
  padding: 11px 13px;
}

main textarea {
  min-height: 104px;
  resize: vertical;
}

main input::placeholder,
main textarea::placeholder {
  color: #6b7b8f;
}

/* 弹窗 textarea 与 input 样式保持一致（修正 public.css 选择器遗漏） */
.zezao .main textarea {
  display: inline-block;
  width: 100%;
  text-align: left;
  padding: 5px 16px;
  border-radius: 5px;
  border: 1px solid rgba(0, 0, 0, 0.1);
  font-weight: normal;
  font-size: 14px;
  box-sizing: border-box;
}

.form .button {
  margin-top: 22px;
  width: 100%;
}

.privacy {
  margin: 12px 0 0;
  color: #64748b;
  font-size: 12px;
  text-align: center;
}

.form-status {
  min-height: 24px;
  margin: 12px 0 0;
  color: var(--success);
  font-size: 14px;
  text-align: center;
}

footer {
  background: #050f21;
  color: #aebfd4;
  padding: 38px 0;
}

.footer-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 24px;
}

.footer-inner strong {
  color: white;
}

.footer-meta {
  font-size: 13px;
  text-align: right;
}

.reveal {
  opacity: 0;
  transform: translateY(22px);
  transition: opacity .6s cubic-bezier(.16, 1, .3, 1), transform .6s cubic-bezier(.16, 1, .3, 1);
}

.reveal.visible {
  opacity: 1;
  transform: none;
}

@media (max-width: 900px) {
  .nav-links {
    display: none;
  }

  .hero-grid,
  .bridge-grid,
  .contact-grid {
    grid-template-columns: 1fr;
    gap: 44px;
  }

  .hero {
    min-height: auto;
  }

  .hero-grid {
    padding: 56px 0 76px;
  }

  h1 {
    font-size: 46px;
  }

  .hero-visual {
    min-height: 480px;
  }

  .photo-shell {
    left: 30px;
  }

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

  .proof-intro {
    grid-column: 1 / -1;
    padding-left: 0;
  }

  .proof-item {
    border-top: 1px solid var(--line);
  }

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

  .audience-photo {
    grid-column: 1;
    grid-row: auto;
    margin: 36px 0 0;
    min-height: 420px;
  }

  .support-grid {
    grid-template-columns: 1fr;
    grid-template-rows: auto;
  }

  .support-card:first-child {
    grid-row: auto;
  }

  .process-line {
    grid-template-columns: 1fr 1fr;
    row-gap: 30px;
  }
}

@media (max-width: 640px) {
  .container {
    width: min(calc(100% - 32px), var(--container));
  }

  .nav {
    height: 64px;
  }

  .brand {
    font-size: 14px;
  }

  .nav .button {
    min-height: 40px;
    padding-inline: 12px;
  }

  section {
    padding: 72px 0;
  }

  h1 {
    font-size: 38px;
  }

  h2 {
    font-size: 34px;
  }

  .hero-copy>p {
    font-size: 16px;
  }

  .hero-actions {
    display: grid;
  }

  .hero-visual {
    min-height: 390px;
  }

  .photo-shell {
    inset: 22px 0 42px 20px;
  }

  .signal-panel {
    width: 210px;
    padding: 18px;
  }

  .signal-panel strong {
    font-size: 23px;
  }

  .ai-chip {
    right: -8px;
    width: 124px;
    padding: 14px;
    font-size: 13px;
  }

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

  .proof-intro,
  .proof-item {
    padding: 20px 0;
    border-right: 0;
  }

  .bridge-grid {
    gap: 36px;
  }

  .bridge-diagram {
    min-height: 340px;
    transform: scale(.85);
  }

  .audience-row {
    grid-template-columns: 48px 1fr;
    gap: 14px;
  }

  .audience-photo {
    min-height: 330px;
  }

  .support-card {
    padding: 26px;
  }

  .support-card:first-child {
    min-height: 480px;
  }

  .support-list li {
    grid-template-columns: 76px 1fr;
  }

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

  .policy-item {
    min-height: auto;
  }

  .process-line {
    grid-template-columns: 1fr;
  }

  .process-step {
    padding-bottom: 28px;
  }

  .process-step::after {
    display: none;
  }

  .contact-grid {
    gap: 36px;
  }

  .form {
    padding: 24px 18px;
  }

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

  .field-full {
    grid-column: 1;
  }

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

  .footer-meta {
    text-align: left;
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  *,
  *::before,
  *::after {
    animation-duration: .01ms !important;
    transition-duration: .01ms !important;
  }

  .reveal {
    opacity: 1;
    transform: none;
  }
}