:root {
  --ink: #181b46;
  --muted: #667089;
  --line: rgba(83, 101, 155, 0.14);
  --primary: #4b54ff;
  --primary-deep: #2d42f6;
  --surface: rgba(255, 255, 255, 0.92);
  --shadow: 0 24px 70px rgba(77, 103, 168, 0.14);
  --font-ui: "HarmonyOS Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: var(--font-ui);
  color: var(--ink);
  background:
    radial-gradient(circle at top left, rgba(187, 210, 255, 0.5), transparent 36%),
    linear-gradient(180deg, #f4f7ff 0%, #edf4ff 38%, #f8fbff 100%);
}

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

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

.tutorial-shell {
  width: min(1100px, calc(100% - 40px));
  margin: 0 auto;
}

.tutorial-hero {
  position: sticky;
  top: 0;
  z-index: 10;
  backdrop-filter: blur(18px);
  background: rgba(244, 247, 255, 0.84);
  border-bottom: 1px solid rgba(83, 101, 155, 0.08);
}

.tutorial-hero .tutorial-shell {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 18px 0;
}

.tutorial-brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  font-size: 22px;
  font-weight: 700;
  color: #423bff;
}

.tutorial-brand__logo {
  width: 40px;
  height: 40px;
  border-radius: 12px;
  box-shadow: 0 12px 24px rgba(93, 124, 239, 0.22);
}

.tutorial-nav {
  display: flex;
  align-items: center;
  gap: 28px;
  font-size: 15px;
  font-weight: 600;
  color: rgba(24, 27, 70, 0.8);
}

.tutorial-nav a:hover {
  color: var(--primary);
}

.tutorial-main {
  padding: 34px 0 72px;
}

.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 20px;
  color: rgba(24, 27, 70, 0.52);
  font-size: 14px;
}

.article {
  padding: 42px;
  border: 1px solid var(--line);
  border-radius: 32px;
  background: var(--surface);
  box-shadow: var(--shadow);
}

.article__eyebrow {
  margin: 0 0 16px;
  color: rgba(24, 27, 70, 0.42);
  font-size: 14px;
  letter-spacing: 0.24em;
}

.article__header h1 {
  margin: 0;
  font-size: clamp(34px, 5vw, 48px);
  line-height: 1.14;
}

.article__meta {
  display: flex;
  flex-wrap: wrap;
  gap: 18px;
  margin-top: 18px;
  color: rgba(24, 27, 70, 0.56);
  font-size: 14px;
}

.article__lead {
  margin: 24px 0 0;
  color: #49526e;
  font-size: 16px;
  line-height: 1.75;
}

.article__section + .article__section {
  margin-top: 44px;
}

.article__section h2 {
  margin: 0 0 16px;
  font-size: 24px;
}

.article__section h3 {
  margin: 0;
  font-size: 18px;
}

.article__section p,
.article__section li {
  color: #4f5877;
  font-size: 14px;
  line-height: 1.72;
}

.article__figure {
  margin: 24px 0 0;
}

.article__figure img {
  width: min(100%, 940px);
  margin: 0 auto;
  border-radius: 24px;
  border: 1px solid rgba(88, 108, 166, 0.12);
  box-shadow: 0 16px 38px rgba(70, 94, 173, 0.12);
}

.article__figure figcaption {
  margin-top: 12px;
  color: rgba(24, 27, 70, 0.56);
  font-size: 12px;
  text-align: center;
}

.steps {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
}

.step-card,
.faq-item,
.feature-grid article {
  padding: 22px 20px;
  border: 1px solid var(--line);
  border-radius: 22px;
  background: rgba(255, 255, 255, 0.72);
}

.step-card strong {
  display: block;
  font-size: 16px;
}

.step-card p {
  margin: 10px 0 0;
}

.notice {
  margin-top: 18px;
  padding: 18px 20px;
  border-left: 4px solid var(--primary);
  border-radius: 18px;
  background: rgba(75, 84, 255, 0.06);
}

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

.notice p {
  margin: 8px 0 0;
}

.doc-linkgroup {
  display: grid;
  gap: 12px;
  margin-bottom: 20px;
}

.doc-linkbox {
  display: inline-flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 10px;
  padding: 12px 16px;
  border-radius: 18px;
  background: rgba(255, 255, 255, 0.76);
  border: 1px solid var(--line);
  font-size: 14px;
}

.doc-linkbox span {
  font-weight: 700;
}

.doc-linkbox a {
  color: #ff7a1a;
  word-break: break-all;
}

.doc-linkbox a:hover {
  color: #d85d00;
}

.quickstart {
  display: grid;
  grid-template-columns: minmax(0, 0.9fr) minmax(0, 1.1fr);
  gap: 22px;
  align-items: start;
}

.quickstart__copy {
  padding: 24px;
  border: 1px solid var(--line);
  border-radius: 24px;
  background: rgba(255, 255, 255, 0.72);
  font-size: 14px;
}

.quickstart__copy ol {
  margin: 0;
  padding-left: 22px;
}

.quickstart__figure {
  margin: 0;
}

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

.feature-grid article img {
  width: 52px;
  height: 52px;
  margin-bottom: 14px;
}

.feature-grid article p {
  margin: 10px 0 0;
}

.faq-list {
  display: grid;
  gap: 16px;
}

.faq-item {
  padding: 0;
  overflow: hidden;
}

.faq-trigger {
  display: flex;
  align-items: center;
  gap: 18px;
  width: 100%;
  padding: 18px 18px;
  border: 0;
  background: transparent;
  text-align: left;
  color: var(--ink);
}

.faq-trigger__icon {
  flex: 0 0 auto;
  color: #f37d16;
  font-size: 28px;
  line-height: 1;
  transition: transform 180ms ease;
}

.faq-trigger__title {
  font-size: 15px;
  font-weight: 700;
  line-height: 1.45;
}

.faq-item.is-open .faq-trigger__icon {
  transform: rotate(45deg);
}

.faq-answer {
  display: none;
  padding: 0 18px 18px 58px;
}

.faq-item.is-open .faq-answer {
  display: block;
}

.faq-answer p {
  margin: 0;
  font-size: 13px;
  line-height: 1.7;
}

.faq-answer__download {
  margin-top: 12px !important;
  color: #4f5877;
  font-size: 13px !important;
}

.faq-answer__download a {
  color: #f37d16;
  word-break: break-all;
}

.faq-answer__download a:hover {
  color: #d85d00;
}

.faq-answer img {
  width: min(100%, 640px);
  margin-top: 16px;
  border-radius: 18px;
  border: 1px solid rgba(88, 108, 166, 0.12);
  box-shadow: 0 12px 28px rgba(70, 94, 173, 0.1);
}

.article__section--support {
  margin-top: 52px;
}

.support-box {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 156px;
  gap: 24px;
  align-items: center;
  padding: 24px;
  border-radius: 28px;
  background:
    linear-gradient(180deg, rgba(169, 203, 255, 0.64), rgba(95, 146, 255, 0.28)),
    url("./assets/image/center/banner3-1.png") center center / cover no-repeat;
}

.support-box img {
  width: 156px;
  height: 156px;
  border-radius: 18px;
  background: #fff;
}

.support-actions {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  margin-top: 18px;
}

.support-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 138px;
  height: 44px;
  padding: 0 20px;
  border-radius: 999px;
  color: #fff;
  font-weight: 700;
  background: linear-gradient(90deg, #524cff 0%, #a4b6fd 100%);
  box-shadow: 0 12px 28px rgba(92, 96, 224, 0.24);
}

.support-button--ghost {
  color: var(--primary);
  background: rgba(255, 255, 255, 0.78);
  box-shadow: none;
  border: 1px solid rgba(75, 84, 255, 0.18);
}

@media (max-width: 900px) {
  .tutorial-hero .tutorial-shell,
  .quickstart,
  .support-box {
    grid-template-columns: 1fr;
  }

  .tutorial-hero .tutorial-shell {
    display: grid;
  }

  .tutorial-nav {
    flex-wrap: wrap;
    gap: 16px;
  }

  .steps,
  .feature-grid {
    grid-template-columns: 1fr;
  }

  .article {
    padding: 28px 20px;
  }

  .faq-trigger__title {
    font-size: 14px;
  }

  .faq-answer {
    padding: 0 14px 16px 44px;
  }

  .faq-answer img {
    width: 100%;
  }
}