:root {
  color-scheme: light;
  --ink: #07111f;
  --muted: #5e6d82;
  --line: #d7e2f1;
  --paper: #f4f8fd;
  --white: #ffffff;
  --blue: #2364f0;
  --green: #0ca678;
  --orange: #f97316;
  --navy: #08162c;
  --shadow: 0 24px 70px rgba(17, 35, 63, 0.16);
  --radius: 8px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: "Microsoft YaHei", "PingFang SC", "Noto Sans CJK SC", sans-serif;
  color: var(--ink);
  background:
    linear-gradient(90deg, rgba(35, 100, 240, 0.06) 1px, transparent 1px),
    linear-gradient(180deg, rgba(35, 100, 240, 0.045) 1px, transparent 1px),
    var(--paper);
  background-size: 40px 40px;
}

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

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

.site-header {
  position: fixed;
  inset: 0 0 auto;
  z-index: 30;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 22px;
  height: 76px;
  padding: 0 clamp(18px, 4vw, 58px);
  color: var(--ink);
  background: rgba(255, 255, 255, 0.94);
  box-shadow: 0 10px 34px rgba(18, 39, 70, 0.08);
  backdrop-filter: blur(18px);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  min-width: 210px;
}

.brand img {
  width: 42px;
  height: 42px;
  border-radius: 8px;
}

.brand span {
  display: grid;
  gap: 2px;
  line-height: 1.05;
}

.brand strong {
  font-size: 18px;
  font-weight: 900;
}

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

.nav-links {
  display: flex;
  align-items: center;
  gap: 4px;
  padding: 6px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: rgba(244, 248, 253, 0.8);
}

.nav-links a {
  padding: 8px 12px;
  border-radius: 999px;
  font-size: 14px;
}

.nav-links a:hover {
  background: #eaf1fb;
}

.header-action,
.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius);
  border: 1px solid transparent;
  font-weight: 900;
  white-space: nowrap;
}

.header-action {
  min-height: 42px;
  padding: 0 18px;
  color: #fff;
  background: var(--blue);
  box-shadow: 0 12px 30px rgba(35, 100, 240, 0.28);
}

.hero {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 0.92fr) minmax(430px, 1.08fr);
  gap: clamp(30px, 5vw, 72px);
  align-items: center;
  min-height: 94vh;
  padding: 132px clamp(18px, 5vw, 72px) 68px;
  overflow: hidden;
  color: #fff;
  background:
    radial-gradient(circle at 92% 12%, rgba(12, 166, 120, 0.24), transparent 28%),
    linear-gradient(135deg, #061022 0%, #092451 56%, #07111f 100%);
}

.hero-bg {
  position: absolute;
  inset: 0;
  opacity: 0.13;
}

.hero-bg img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center top;
}

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

.hero-label {
  display: inline-flex;
  align-items: center;
  min-height: 34px;
  padding: 0 12px;
  margin-bottom: 22px;
  border: 1px solid rgba(66, 229, 177, 0.38);
  border-radius: 999px;
  color: #42e5b1;
  background: rgba(66, 229, 177, 0.08);
  font-size: 14px;
  font-weight: 900;
}

.hero h1 {
  max-width: 820px;
  margin: 0;
  font-size: clamp(48px, 7.2vw, 100px);
  line-height: 0.98;
  letter-spacing: 0;
}

.hero-copy {
  max-width: 720px;
  margin: 28px 0 0;
  color: rgba(255, 255, 255, 0.82);
  font-size: clamp(18px, 1.8vw, 23px);
  line-height: 1.74;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 34px;
}

.button {
  min-height: 52px;
  padding: 0 22px;
  transition: transform 160ms ease, box-shadow 160ms ease;
}

.button:hover {
  transform: translateY(-2px);
}

.button.primary {
  color: #fff;
  background: var(--blue);
  box-shadow: 0 18px 42px rgba(35, 100, 240, 0.32);
}

.button.quiet {
  color: #fff;
  border-color: rgba(255, 255, 255, 0.24);
  background: rgba(255, 255, 255, 0.08);
}

.button.quiet.light {
  color: #fff;
  border-color: rgba(255, 255, 255, 0.32);
}

.hero-panel {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1px;
  max-width: 760px;
  margin-top: 56px;
  border: 1px solid rgba(255, 255, 255, 0.16);
  border-radius: var(--radius);
  overflow: hidden;
  background: rgba(255, 255, 255, 0.16);
}

.hero-panel div {
  padding: 20px;
  background: rgba(255, 255, 255, 0.08);
  backdrop-filter: blur(14px);
}

.hero-panel strong,
.hero-panel span {
  display: block;
}

.hero-panel strong {
  color: #42e5b1;
  font-size: 13px;
}

.hero-panel span {
  margin-top: 8px;
  color: #fff;
  font-size: 18px;
  font-weight: 900;
}

.hero-preview {
  align-self: end;
  padding: 10px;
  border-radius: 10px;
  background: rgba(255, 255, 255, 0.12);
  border: 1px solid rgba(255, 255, 255, 0.16);
  box-shadow: 0 34px 90px rgba(0, 0, 0, 0.34);
}

.hero-preview img {
  width: 100%;
  aspect-ratio: 16 / 9;
  object-fit: cover;
  object-position: center top;
  border-radius: var(--radius);
}

.preview-badge {
  position: absolute;
  right: 28px;
  bottom: 28px;
  min-width: 168px;
  padding: 14px 16px;
  border-radius: var(--radius);
  color: var(--ink);
  background: #fff;
  box-shadow: 0 18px 40px rgba(8, 22, 44, 0.22);
}

.preview-badge span,
.preview-badge strong {
  display: block;
}

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

.preview-badge strong {
  margin-top: 4px;
  color: var(--blue);
  font-size: 28px;
}

.section,
.position-section {
  padding: clamp(76px, 8vw, 120px) 0;
}

.section-inner {
  width: min(1180px, calc(100% - 36px));
  margin: 0 auto;
}

.position-section {
  color: #fff;
  background: #07111f;
}

.position-grid {
  display: grid;
  grid-template-columns: minmax(320px, 0.9fr) minmax(320px, 1.1fr);
  gap: clamp(32px, 6vw, 92px);
  align-items: center;
}

.position-grid h2,
.split-head h2,
.problem-title h2,
.contact-cta h2 {
  margin: 0;
  font-size: clamp(32px, 4.4vw, 58px);
  line-height: 1.12;
  letter-spacing: 0;
}

.position-copy {
  border-left: 3px solid #42e5b1;
  padding-left: 28px;
}

.position-copy p,
.split-head p,
.problem-title p,
.contact-cta p {
  margin: 0;
  color: var(--muted);
  font-size: 18px;
  line-height: 1.78;
}

.position-copy p,
.problem-title p,
.contact-cta p {
  color: rgba(255, 255, 255, 0.72);
}

.split-head {
  display: grid;
  grid-template-columns: minmax(320px, 0.96fr) minmax(320px, 0.78fr);
  gap: clamp(28px, 5vw, 72px);
  align-items: end;
  margin-bottom: 42px;
}

.workflow-section {
  background: transparent;
}

.scenario-section {
  background: #fff;
}

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

.scenario-grid article {
  position: relative;
  display: grid;
  align-content: start;
  min-height: 296px;
  padding: 24px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  background:
    linear-gradient(180deg, rgba(35, 100, 240, 0.06), transparent 48%),
    #fff;
  box-shadow: 0 16px 44px rgba(18, 39, 70, 0.08);
}

.scenario-grid article::after {
  content: "";
  position: absolute;
  inset: auto 24px 0;
  height: 4px;
  background: linear-gradient(90deg, var(--blue), var(--green), var(--orange));
}

.scenario-grid span {
  justify-self: start;
  padding: 7px 10px;
  border-radius: 999px;
  color: var(--blue);
  background: rgba(35, 100, 240, 0.09);
  font-size: 13px;
  font-weight: 900;
}

.scenario-grid strong {
  display: block;
  margin-top: 22px;
  font-size: 22px;
  line-height: 1.34;
}

.scenario-grid p {
  margin: 16px 0 0;
  color: var(--muted);
  line-height: 1.72;
}

.process-line {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 0;
  padding: 0;
  margin: 0;
  list-style: none;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  background: #fff;
  box-shadow: var(--shadow);
}

.process-line li {
  position: relative;
  min-height: 214px;
  padding: 28px;
  border-right: 1px solid var(--line);
}

.process-line li:last-child {
  border-right: 0;
}

.process-line span {
  color: var(--blue);
  font-size: 13px;
  font-weight: 900;
}

.process-line strong {
  display: block;
  margin-top: 36px;
  font-size: 28px;
}

.process-line p {
  margin: 12px 0 0;
  color: var(--muted);
  line-height: 1.7;
}

.dark-section {
  color: #fff;
  background:
    linear-gradient(135deg, rgba(35, 100, 240, 0.16), transparent 42%),
    #07111f;
}

.problem-layout {
  display: grid;
  grid-template-columns: minmax(320px, 0.82fr) minmax(360px, 1.18fr);
  gap: clamp(32px, 6vw, 82px);
  align-items: start;
}

.problem-title p {
  margin-top: 24px;
}

.problem-table {
  display: grid;
  border: 1px solid rgba(255, 255, 255, 0.16);
  border-radius: var(--radius);
  overflow: hidden;
  background: rgba(255, 255, 255, 0.08);
}

.problem-table div {
  display: grid;
  grid-template-columns: 190px 1fr;
  gap: 24px;
  padding: 24px 26px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.14);
}

.problem-table div:last-child {
  border-bottom: 0;
}

.problem-table strong {
  font-size: 20px;
}

.problem-table span {
  color: rgba(255, 255, 255, 0.72);
  line-height: 1.7;
}

.screen-section {
  background: #fff;
}

.version-section {
  background: #fff;
}

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

.version-grid article {
  display: grid;
  align-content: start;
  min-height: 324px;
  padding: 24px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: #fff;
  box-shadow: 0 16px 44px rgba(18, 39, 70, 0.08);
}

.version-grid strong {
  display: block;
  font-size: 22px;
  line-height: 1.3;
}

.version-grid p {
  margin: 16px 0 20px;
  color: var(--muted);
  line-height: 1.72;
}

.version-grid ul {
  display: grid;
  gap: 10px;
  padding: 18px 0 0;
  margin: auto 0 0;
  border-top: 1px solid var(--line);
  color: var(--ink);
  font-weight: 800;
  list-style: none;
}

.version-grid li {
  position: relative;
  padding-left: 18px;
}

.version-grid li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.72em;
  width: 7px;
  height: 7px;
  border-radius: 999px;
  background: var(--blue);
}

.answer-section {
  background:
    linear-gradient(180deg, rgba(35, 100, 240, 0.07), transparent 42%),
    #edf4fc;
}

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

.answer-grid article {
  min-height: 284px;
  padding: 26px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: #fff;
  box-shadow: 0 16px 44px rgba(18, 39, 70, 0.08);
}

.answer-grid span,
.topic-grid span,
.page-card span {
  display: inline-flex;
  align-items: center;
  min-height: 32px;
  padding: 0 10px;
  border-radius: 999px;
  color: var(--blue);
  background: rgba(35, 100, 240, 0.09);
  font-size: 13px;
  font-weight: 900;
}

.answer-grid h3 {
  margin: 22px 0 0;
  font-size: 26px;
  line-height: 1.24;
}

.answer-grid p {
  margin: 16px 0 0;
  color: var(--muted);
  line-height: 1.76;
}

.topic-section {
  background: #fff;
}

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

.topic-grid a {
  display: grid;
  align-content: start;
  min-height: 236px;
  padding: 24px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background:
    linear-gradient(180deg, rgba(12, 166, 120, 0.07), transparent 48%),
    #fff;
  box-shadow: 0 16px 44px rgba(18, 39, 70, 0.08);
  transition: transform 160ms ease, border-color 160ms ease;
}

.topic-grid a:hover {
  border-color: rgba(35, 100, 240, 0.42);
  transform: translateY(-3px);
}

.topic-grid strong {
  display: block;
  margin-top: 20px;
  font-size: 22px;
  line-height: 1.32;
}

.topic-grid p {
  margin: 14px 0 0;
  color: var(--muted);
  line-height: 1.7;
}

.app-section {
  color: #fff;
  background:
    linear-gradient(135deg, rgba(12, 166, 120, 0.18), transparent 42%),
    #07111f;
}

.app-layout {
  display: grid;
  grid-template-columns: minmax(320px, 0.78fr) minmax(380px, 1.22fr);
  gap: clamp(32px, 6vw, 82px);
  align-items: start;
}

.app-layout h2 {
  margin: 0;
  font-size: clamp(32px, 4.4vw, 58px);
  line-height: 1.12;
}

.app-layout > div > p {
  margin: 24px 0 0;
  color: rgba(255, 255, 255, 0.72);
  font-size: 18px;
  line-height: 1.78;
}

.app-list {
  display: grid;
  gap: 14px;
}

.app-list article {
  display: grid;
  grid-template-columns: 110px 1fr;
  gap: 10px 22px;
  padding: 24px 26px;
  border: 1px solid rgba(255, 255, 255, 0.16);
  border-radius: var(--radius);
  background: rgba(255, 255, 255, 0.08);
}

.app-list span {
  grid-row: span 2;
  align-self: start;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 36px;
  border-radius: 999px;
  color: #42e5b1;
  background: rgba(66, 229, 177, 0.1);
  font-size: 13px;
  font-weight: 900;
}

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

.app-list p {
  margin: 0;
  color: rgba(255, 255, 255, 0.72);
  line-height: 1.7;
}

.product-showcase {
  display: grid;
  grid-template-columns: minmax(0, 1.08fr) minmax(330px, 0.92fr);
  gap: 18px;
}

.feature-screen,
.module-grid figure,
.qr-card {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: #fff;
  box-shadow: var(--shadow);
  overflow: hidden;
}

.feature-screen img {
  width: 100%;
  aspect-ratio: 16 / 9;
  object-fit: cover;
  object-position: center top;
}

.primary-screen img {
  aspect-ratio: 16 / 10;
}

.screen-stack {
  display: grid;
  gap: 18px;
}

.screen-caption {
  padding: 22px 24px 24px;
}

.screen-caption strong {
  display: block;
  font-size: 24px;
}

.screen-caption p {
  margin: 10px 0 0;
  color: var(--muted);
  line-height: 1.68;
}

.module-section {
  background: #edf4fc;
}

.onboarding-section {
  color: #fff;
  background:
    linear-gradient(135deg, rgba(249, 115, 22, 0.16), transparent 38%),
    linear-gradient(315deg, rgba(12, 166, 120, 0.14), transparent 34%),
    #07111f;
}

.onboarding-layout {
  display: grid;
  grid-template-columns: minmax(320px, 0.82fr) minmax(380px, 1.18fr);
  gap: clamp(32px, 6vw, 82px);
  align-items: start;
}

.section-kicker {
  display: inline-flex;
  align-items: center;
  min-height: 34px;
  padding: 0 12px;
  margin-bottom: 22px;
  border: 1px solid rgba(66, 229, 177, 0.36);
  border-radius: 999px;
  color: #42e5b1;
  background: rgba(66, 229, 177, 0.08);
  font-size: 14px;
  font-weight: 900;
}

.onboarding-copy h2 {
  margin: 0;
  font-size: clamp(32px, 4.4vw, 58px);
  line-height: 1.12;
  letter-spacing: 0;
}

.onboarding-copy p {
  margin: 24px 0 0;
  color: rgba(255, 255, 255, 0.72);
  font-size: 18px;
  line-height: 1.78;
}

.onboarding-steps {
  display: grid;
  gap: 14px;
  padding: 0;
  margin: 0;
  list-style: none;
}

.onboarding-steps li {
  display: grid;
  grid-template-columns: 48px 1fr;
  gap: 8px 20px;
  padding: 24px 26px;
  border: 1px solid rgba(255, 255, 255, 0.16);
  border-radius: var(--radius);
  background: rgba(255, 255, 255, 0.08);
}

.onboarding-steps span {
  grid-row: span 2;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 42px;
  height: 42px;
  border-radius: 999px;
  color: #07111f;
  background: #42e5b1;
  font-weight: 900;
}

.onboarding-steps strong {
  font-size: 22px;
}

.onboarding-steps p {
  margin: 0;
  color: rgba(255, 255, 255, 0.72);
  line-height: 1.7;
}

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

.module-grid figure {
  margin: 0;
}

.module-grid img {
  width: 100%;
  aspect-ratio: 16 / 9;
  object-fit: cover;
  object-position: center top;
}

.module-grid figcaption {
  padding: 18px 20px 20px;
  font-weight: 900;
  line-height: 1.45;
}

.faq-section {
  background: #fff;
}

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

.faq-list details {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: #fff;
  box-shadow: 0 12px 34px rgba(18, 39, 70, 0.06);
}

.faq-list summary {
  cursor: pointer;
  padding: 22px 24px;
  color: var(--ink);
  font-size: 20px;
  font-weight: 900;
}

.faq-list p {
  margin: 0;
  padding: 0 24px 24px;
  color: var(--muted);
  line-height: 1.76;
}

.contact-cta {
  padding: 86px 0;
  color: #fff;
  background:
    radial-gradient(circle at 88% 20%, rgba(249, 115, 22, 0.22), transparent 26%),
    linear-gradient(135deg, #07111f, #0a2c68);
}

.cta-grid {
  display: grid;
  grid-template-columns: minmax(320px, 1fr) 280px;
  gap: 42px;
  align-items: center;
}

.contact-cta p {
  max-width: 780px;
  margin-top: 22px;
}

.cta-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 30px;
}

.qr-card {
  display: grid;
  gap: 12px;
  justify-items: center;
  padding: 22px;
  color: var(--ink);
  text-align: center;
}

.qr-card img {
  width: 190px;
  border-radius: 8px;
}

.qr-card strong {
  font-size: 20px;
}

.qr-card span {
  color: var(--muted);
  font-size: 13px;
  line-height: 1.5;
}

.topic-page {
  background: #f4f8fd;
}

.page-hero {
  position: relative;
  padding: 132px clamp(18px, 5vw, 72px) 72px;
  color: #fff;
  overflow: hidden;
  background:
    radial-gradient(circle at 86% 18%, rgba(12, 166, 120, 0.22), transparent 28%),
    linear-gradient(135deg, #061022 0%, #0a2c68 58%, #07111f 100%);
}

.page-hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 0.92fr) minmax(380px, 1.08fr);
  gap: clamp(30px, 5vw, 68px);
  align-items: center;
}

.page-hero h1 {
  max-width: 820px;
  margin: 0;
  font-size: clamp(42px, 6.4vw, 82px);
  line-height: 1.02;
  letter-spacing: 0;
}

.page-hero p {
  max-width: 760px;
  margin: 26px 0 0;
  color: rgba(255, 255, 255, 0.82);
  font-size: clamp(17px, 1.7vw, 22px);
  line-height: 1.76;
}

.page-visual {
  margin: 0;
  padding: 10px;
  border: 1px solid rgba(255, 255, 255, 0.16);
  border-radius: 10px;
  background: rgba(255, 255, 255, 0.12);
  box-shadow: 0 34px 90px rgba(0, 0, 0, 0.34);
}

.page-visual img {
  width: 100%;
  aspect-ratio: 16 / 10;
  object-fit: cover;
  object-position: center top;
  border-radius: var(--radius);
}

.page-section {
  background: #07111f;
  color: #fff;
}

.page-split {
  display: grid;
  grid-template-columns: minmax(320px, 0.82fr) minmax(360px, 1.18fr);
  gap: clamp(32px, 6vw, 82px);
  align-items: start;
}

.page-split h2 {
  margin: 0;
  font-size: clamp(32px, 4.4vw, 58px);
  line-height: 1.12;
  letter-spacing: 0;
}

.page-copy {
  display: grid;
  gap: 18px;
}

.page-copy p {
  margin: 0;
  color: rgba(255, 255, 255, 0.74);
  font-size: 18px;
  line-height: 1.82;
}

.page-cards-section {
  background: #edf4fc;
}

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

.page-card {
  min-height: 248px;
  padding: 24px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: #fff;
  box-shadow: 0 16px 44px rgba(18, 39, 70, 0.08);
}

.page-card strong {
  display: block;
  margin-top: 20px;
  font-size: 22px;
  line-height: 1.32;
}

.page-card p {
  margin: 14px 0 0;
  color: var(--muted);
  line-height: 1.72;
}

.site-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 28px clamp(18px, 4vw, 58px);
  color: #d9e2ef;
  background: #07111f;
}

.site-footer nav {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 14px 18px;
}

.site-footer a {
  color: #fff;
  font-weight: 800;
}

.support-widget {
  position: fixed;
  right: 22px;
  bottom: 22px;
  z-index: 80;
  display: grid;
  justify-items: end;
  gap: 12px;
  width: min(360px, calc(100vw - 32px));
  pointer-events: none;
}

.support-panel {
  display: grid;
  gap: 14px;
  width: 100%;
  max-height: min(680px, calc(100vh - 110px));
  padding: 16px;
  border: 1px solid rgba(215, 226, 241, 0.92);
  border-radius: var(--radius);
  background: rgba(255, 255, 255, 0.98);
  box-shadow: 0 28px 78px rgba(8, 22, 44, 0.24);
  overflow: auto;
  opacity: 0;
  transform: translateY(14px) scale(0.98);
  pointer-events: none;
  transition: opacity 180ms ease, transform 180ms ease;
}

.support-widget.is-open .support-panel {
  opacity: 1;
  transform: translateY(0) scale(1);
  pointer-events: auto;
}

.support-head {
  display: grid;
  grid-template-columns: 46px 1fr auto;
  gap: 12px;
  align-items: center;
}

.support-avatar {
  width: 46px;
  height: 46px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  object-fit: cover;
  background: #fff;
}

.support-head strong {
  display: block;
  font-size: 18px;
  line-height: 1.2;
}

.support-head span,
.support-reply,
.support-copy-hint {
  color: var(--muted);
  font-size: 13px;
  line-height: 1.55;
}

.support-close,
.support-toggle {
  border: 0;
  cursor: pointer;
  font-family: inherit;
}

.support-close {
  width: 34px;
  height: 34px;
  border-radius: var(--radius);
  color: var(--muted);
  background: #eef4fb;
  font-size: 22px;
  line-height: 1;
}

.support-phone {
  display: grid;
  gap: 4px;
  padding: 14px;
  border-radius: var(--radius);
  color: #fff;
  background: linear-gradient(135deg, #0a2c68, #0ca678);
}

.support-phone span {
  font-size: 13px;
  color: rgba(255, 255, 255, 0.78);
}

.support-phone strong {
  font-size: 24px;
  letter-spacing: 0;
}

.support-quick {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
}

.support-quick a {
  min-height: 42px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius);
  font-weight: 900;
}

.support-call {
  color: #fff;
  background: var(--orange);
}

.support-wechat {
  color: var(--ink);
  border: 1px solid var(--line);
  background: #f4f8fd;
}

.support-qr {
  display: grid;
  grid-template-columns: 96px 1fr;
  gap: 12px;
  align-items: center;
  padding: 12px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: #fff;
}

.support-qr img {
  width: 96px;
  border-radius: var(--radius);
}

.support-qr strong {
  display: block;
  margin-bottom: 4px;
}

.support-form {
  display: grid;
  gap: 10px;
}

.support-form label {
  display: grid;
  gap: 6px;
  color: var(--ink);
  font-size: 13px;
  font-weight: 900;
}

.support-form input,
.support-form textarea,
.support-form select {
  width: 100%;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 11px 12px;
  color: var(--ink);
  background: #fff;
  font: inherit;
}

.support-form textarea {
  min-height: 74px;
  resize: vertical;
}

.support-submit,
.support-copy {
  min-height: 42px;
  border: 0;
  border-radius: var(--radius);
  color: #fff;
  background: var(--blue);
  cursor: pointer;
  font: inherit;
  font-weight: 900;
}

.support-submit:disabled {
  cursor: wait;
  opacity: 0.62;
}

.support-copy {
  display: none;
  background: var(--green);
}

.support-copy.is-visible {
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

.support-reply {
  display: none;
  padding: 12px;
  border: 1px solid rgba(12, 166, 120, 0.28);
  border-radius: var(--radius);
  color: #0a5f48;
  background: rgba(12, 166, 120, 0.08);
}

.support-reply.is-visible {
  display: block;
}

.support-toggle {
  display: inline-grid;
  grid-template-columns: 42px auto;
  align-items: center;
  gap: 10px;
  min-height: 58px;
  padding: 8px 16px 8px 8px;
  border-radius: 999px;
  color: #fff;
  background: #07111f;
  box-shadow: 0 18px 48px rgba(8, 22, 44, 0.28);
  pointer-events: auto;
}

.support-toggle img {
  width: 42px;
  height: 42px;
  border-radius: 50%;
  object-fit: cover;
  background: #fff;
}

.support-toggle span {
  font-weight: 900;
  white-space: nowrap;
}

@media (max-width: 1040px) {
  .hero,
  .position-grid,
  .split-head,
  .problem-layout,
  .product-showcase,
  .app-layout,
  .onboarding-layout,
  .page-hero-grid,
  .page-split,
  .cta-grid {
    grid-template-columns: 1fr;
  }

  .hero {
    min-height: auto;
  }

  .process-line,
  .scenario-grid,
  .version-grid,
  .answer-grid,
  .topic-grid,
  .page-card-grid,
  .module-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .process-line li:nth-child(2) {
    border-right: 0;
  }

  .process-line li:nth-child(-n + 2) {
    border-bottom: 1px solid var(--line);
  }
}

@media (max-width: 820px) {
  .site-header {
    height: 68px;
  }

  .brand {
    min-width: auto;
  }

  .brand small {
    display: none;
  }

  .nav-links {
    display: none;
  }

  .header-action {
    min-height: 38px;
    padding: 0 14px;
    font-size: 14px;
  }

  .hero {
    padding-top: 104px;
  }

  .hero-panel,
  .process-line,
  .scenario-grid,
  .version-grid,
  .answer-grid,
  .topic-grid,
  .page-card-grid,
  .module-grid {
    grid-template-columns: 1fr;
  }

  .process-line li {
    min-height: auto;
    border-right: 0;
    border-bottom: 1px solid var(--line);
  }

  .process-line li:last-child {
    border-bottom: 0;
  }

  .problem-table div {
    grid-template-columns: 1fr;
    gap: 10px;
  }

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

  .app-list span {
    grid-row: auto;
    justify-self: start;
  }

  .onboarding-steps li {
    grid-template-columns: 1fr;
  }

  .onboarding-steps span {
    grid-row: auto;
  }
}

@media (max-width: 560px) {
  .brand img {
    width: 38px;
    height: 38px;
  }

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

  .hero h1 {
    font-size: 48px;
  }

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

  .hero-actions,
  .cta-actions {
    display: grid;
  }

  .hero-preview img,
  .page-visual img,
  .feature-screen img,
  .primary-screen img,
  .module-grid img {
    aspect-ratio: 4 / 3;
  }

  .preview-badge {
    position: static;
    margin: 10px 0 0 auto;
  }

  .site-footer {
    display: grid;
  }

  .site-footer nav {
    justify-content: flex-start;
  }

  .support-widget {
    right: 12px;
    bottom: 12px;
    width: calc(100vw - 24px);
  }

  .support-panel {
    max-height: calc(100vh - 92px);
    padding: 14px;
  }

  .support-head {
    grid-template-columns: 42px 1fr auto;
  }

  .support-avatar {
    width: 42px;
    height: 42px;
  }

  .support-phone strong {
    font-size: 21px;
  }

  .support-quick,
  .support-qr {
    grid-template-columns: 1fr;
  }

  .support-qr img {
    width: 128px;
    justify-self: center;
  }

  .support-toggle {
    grid-template-columns: 38px auto;
    min-height: 52px;
    padding: 7px 13px 7px 7px;
  }

  .support-toggle img {
    width: 38px;
    height: 38px;
  }
}