:root {
  --page-bg: #eef4fb;
  --page-bg-soft: #f7fbff;
  --panel-bg: rgba(255, 255, 255, 0.88);
  --panel-solid: #ffffff;
  --panel-muted: #f4f8fc;
  --line: rgba(31, 68, 112, 0.12);
  --line-strong: rgba(31, 68, 112, 0.2);
  --text-main: #14212f;
  --text-secondary: #5f6f80;
  --brand: #2f6bff;
  --brand-deep: #1d4ed8;
  --accent: #0e7ac4;
  --accent-soft: rgba(14, 122, 196, 0.12);
  --hero-glow: rgba(47, 107, 255, 0.1);
  --shadow-soft: 0 18px 48px rgba(20, 52, 88, 0.08);
  --radius-xl: 28px;
  --radius-lg: 22px;
  --radius-md: 18px;

  --el-color-primary: #2f6bff;
  --el-color-primary-light-3: #5d8cff;
  --el-color-primary-light-5: #88acff;
  --el-color-primary-light-7: #b2cbff;
  --el-color-primary-light-8: #cadcff;
  --el-color-primary-light-9: #e8f0ff;
  --el-color-primary-dark-2: #1d4ed8;
  --el-border-radius-base: 14px;
  --el-border-radius-round: 999px;
  --el-font-size-base: 15px;
  --el-fill-color-blank: #ffffff;
  --el-bg-color: #ffffff;
  --el-bg-color-page: #f4efe8;
  --el-bg-color-overlay: #ffffff;
  --el-text-color-primary: #1f2328;
  --el-text-color-regular: #66707a;
  --el-border-color: rgba(81, 62, 46, 0.12);
  --el-border-color-light: rgba(81, 62, 46, 0.08);
  --el-fill-color-light: #f7f2ec;
  --el-fill-color-lighter: #fbf7f2;
  --el-fill-color-dark: #ebe3d9;
  --el-mask-color: rgba(15, 20, 24, 0.4);
}

html.dark {
  --page-bg: #111418;
  --page-bg-soft: #171b20;
  --panel-bg: rgba(23, 27, 32, 0.88);
  --panel-solid: #181d22;
  --panel-muted: #1d2329;
  --line: rgba(255, 255, 255, 0.08);
  --line-strong: rgba(255, 255, 255, 0.14);
  --text-main: #f3f5f7;
  --text-secondary: #a0a8b2;
  --brand: #6e98ff;
  --brand-deep: #4f7eff;
  --accent: #59b8ff;
  --accent-soft: rgba(89, 184, 255, 0.14);
  --hero-glow: rgba(110, 152, 255, 0.12);
  --shadow-soft: 0 20px 50px rgba(0, 0, 0, 0.28);

  --el-color-primary: #6e98ff;
  --el-color-primary-light-3: #8ab0ff;
  --el-color-primary-light-5: #a8c7ff;
  --el-color-primary-light-7: #c9ddff;
  --el-color-primary-light-8: #dbe8ff;
  --el-color-primary-light-9: #edf4ff;
  --el-color-primary-dark-2: #4f7eff;
  --el-fill-color-blank: #181d22;
  --el-bg-color: #181d22;
  --el-bg-color-page: #111418;
  --el-bg-color-overlay: #1c2127;
  --el-text-color-primary: #f3f5f7;
  --el-text-color-regular: #a0a8b2;
  --el-border-color: rgba(255, 255, 255, 0.08);
  --el-border-color-light: rgba(255, 255, 255, 0.06);
  --el-fill-color-light: #1d2329;
  --el-fill-color-lighter: #20272e;
  --el-fill-color-dark: #0f1317;
  --el-mask-color: rgba(0, 0, 0, 0.62);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family:
    "PingFang SC",
    "Hiragino Sans GB",
    "Microsoft YaHei",
    "Noto Sans CJK SC",
    sans-serif;
  color: var(--text-main);
  background:
    radial-gradient(circle at top left, var(--hero-glow), transparent 24%),
    linear-gradient(180deg, var(--page-bg) 0%, var(--page-bg-soft) 100%);
  transition:
    background-color 220ms ease,
    color 220ms ease;
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  background-image:
    linear-gradient(var(--line) 1px, transparent 1px),
    linear-gradient(90deg, var(--line) 1px, transparent 1px);
  background-size: 28px 28px;
  mask-image: linear-gradient(180deg, rgba(0, 0, 0, 0.18), transparent 80%);
}

a {
  color: inherit;
}

.app-shell {
  width: min(1180px, calc(100% - 32px));
  margin: 0 auto;
  padding: 0 0 48px;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 30;
  display: flex;
  align-items: center;
  justify-content: flex-start;
  gap: 24px;
  width: 100vw;
  margin-left: calc(50% - 50vw);
  padding: 16px max(20px, calc((100vw - 1180px) / 2));
  border: 0;
  border-bottom: 1px solid var(--line);
  border-radius: 0;
  background: var(--panel-bg);
  backdrop-filter: blur(14px);
  box-shadow: var(--shadow-soft);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
}

.brand-mark {
  display: grid;
  place-items: center;
  width: 44px;
  height: 44px;
  border-radius: 14px;
  font-weight: 800;
  color: #fff;
  background: linear-gradient(135deg, var(--brand), var(--brand-deep));
  box-shadow: 0 12px 30px rgba(47, 107, 255, 0.24);
}

.brand-text {
  display: flex;
  flex-direction: column;
  gap: 3px;
}

.brand-text strong,
.hero-copy h1,
.section-heading h2,
.info-card h3,
.scene-copy h3,
.cta-card h2,
.promise-panel h2 {
  font-family:
    "Avenir Next",
    "Segoe UI",
    "PingFang SC",
    "Hiragino Sans GB",
    "Microsoft YaHei",
    sans-serif;
}

.brand-text strong {
  font-size: 1rem;
}

.brand-text small {
  font-size: 0.78rem;
  color: var(--text-secondary);
}

.site-nav {
  display: flex;
  margin-left: auto;
  gap: 18px;
  flex-wrap: wrap;
}

.site-nav a {
  text-decoration: none;
  font-size: 0.95rem;
  color: var(--text-secondary);
}

.site-nav a:hover {
  color: var(--brand);
}

.site-nav a::after {
  content: "";
  display: block;
  height: 2px;
  margin-top: 6px;
  background: currentColor;
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 180ms ease;
}

.site-nav a:hover::after {
  transform: scaleX(1);
}

.theme-toggle {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: var(--text-secondary);
  font-size: 0.92rem;
  white-space: nowrap;
}

.theme-toggle-btn {
  padding: 0;
  border: 0;
  background: transparent;
  cursor: pointer;
}

.theme-toggle-pill {
  position: relative;
  display: inline-flex;
  align-items: center;
  width: 58px;
  height: 26px;
  padding: 0 3px;
  border: 1px solid var(--line-strong);
  border-radius: 999px;
  background: linear-gradient(180deg, #f7f9fc, #eef2f7);
  transition: background 180ms ease, border-color 180ms ease;
}

.theme-toggle-pill.dark {
  background: linear-gradient(180deg, #e4ebf5, #d9e2ee);
}

.theme-toggle-knob {
  display: grid;
  place-items: center;
  width: 20px;
  height: 20px;
  border-radius: 50%;
  background: #fff;
  box-shadow: 0 2px 6px rgba(18, 28, 45, 0.16);
  transform: translateX(0);
  transition: transform 180ms ease;
}

.theme-toggle-pill.dark .theme-toggle-knob {
  transform: translateX(32px);
}

.theme-toggle-sun {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: #343c48;
  box-shadow:
    0 -6px 0 -4px #343c48,
    0 6px 0 -4px #343c48,
    6px 0 0 -4px #343c48,
    -6px 0 0 -4px #343c48;
}

.theme-toggle-moon {
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: #343c48;
  box-shadow: 3px 0 0 0 #fff;
  transform: translateX(-1px);
}

.hero-section,
.strip-section,
.content-section {
  padding-top: 22px;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.08fr 0.92fr;
  gap: 18px;
  padding: 34px 40px 30px;
  border: 1px solid var(--line);
  border-radius: var(--radius-xl);
  background:
    linear-gradient(135deg, var(--hero-glow) 0, var(--hero-glow) 180px, transparent 180px),
    var(--panel-bg);
  backdrop-filter: blur(10px);
  box-shadow: var(--shadow-soft);
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin: 0 0 14px;
  font-size: 0.82rem;
  font-weight: 700;
  letter-spacing: 0.14em;
  color: var(--accent);
}

.eyebrow::before {
  content: "";
  width: 26px;
  height: 2px;
  background: currentColor;
}

.hero-copy h1 {
  margin: 0;
  max-width: none;
  font-size: clamp(2.2rem, 4.2vw, 3.4rem);
  line-height: 1.05;
  letter-spacing: -0.05em;
  text-wrap: balance;
}

.hero-text,
.strip-card p,
.info-card p,
.scene-copy p,
.cta-card p,
.site-footer p,
.promise-item {
  color: var(--text-secondary);
  line-height: 1.74;
}

.hero-text {
  max-width: 420px;
  margin: 12px 0 0;
  font-size: 0.92rem;
}

.hero-actions,
.cta-actions {
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
  margin-top: 16px;
}

.hero-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 14px;
}

.hero-tags .el-tag {
  padding-inline: 16px;
}

.strip-card.el-card,
.info-card.el-card,
.scene-card.el-card,
.promise-panel.el-card,
.cta-card.el-card {
  border-color: var(--line);
  background: var(--panel-solid);
  box-shadow: var(--shadow-soft);
}

.hero-qr-only {
  display: flex;
  align-items: center;
  justify-content: flex-start;
}

.mini-program-visual {
  display: block;
  width: min(100%, 360px);
  padding: 8px;
  border: 1px solid var(--line);
  border-radius: 24px;
  background: var(--panel-solid);
  box-shadow: var(--shadow-soft);
}

.mini-program-visual img {
  display: block;
  width: 100%;
  height: auto;
  border-radius: 16px;
  object-fit: cover;
}

.strip-card,
.info-card,
.scene-card,
.promise-panel,
.cta-card {
  border-radius: var(--radius-lg);
}

.strip-card .el-card__body,
.info-card .el-card__body,
.scene-card .el-card__body,
.promise-panel .el-card__body,
.cta-card .el-card__body {
  padding: 24px;
}

.strip-card strong {
  display: inline-block;
  margin-bottom: 10px;
  font-size: 1.08rem;
}

.content-section {
  padding-top: 92px;
}

.section-heading {
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
  gap: 20px;
  margin-bottom: 24px;
}

.section-heading h2 {
  margin: 0;
  max-width: 13ch;
  font-size: clamp(2rem, 4vw, 3rem);
  line-height: 1.08;
  text-wrap: balance;
}

.info-card {
  margin-bottom: 16px;
}

.info-card h3,
.scene-copy h3 {
  margin: 0 0 12px;
  font-size: 1.36rem;
}

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

.scene-card .el-card__body {
  display: grid;
  grid-template-columns: 96px 1fr;
  gap: 20px;
  align-items: center;
}

.scene-index {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 72px;
  width: fit-content;
  padding: 10px 14px;
  border-radius: 999px;
  background: var(--accent-soft);
  color: var(--accent);
  font-weight: 700;
  letter-spacing: 0.04em;
}

.scene-copy p {
  margin: 0;
}

.steps-panel {
  padding: 28px 24px;
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  background: var(--panel-bg);
  backdrop-filter: blur(10px);
  box-shadow: var(--shadow-soft);
}

.steps-panel .el-step__title {
  color: var(--text-main);
  font-weight: 700;
}

.steps-panel .el-step__description {
  color: var(--text-secondary);
}

.promise-panel {
  background:
    linear-gradient(135deg, var(--hero-glow) 0, var(--hero-glow) 220px, transparent 220px),
    var(--panel-solid);
}

.promise-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
}

.promise-panel h2 {
  margin: 0;
  max-width: 12ch;
  font-size: clamp(2rem, 4vw, 2.8rem);
  line-height: 1.08;
}

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

.promise-item {
  padding: 18px 20px;
  border: 1px solid var(--line);
  border-radius: 16px;
  background: var(--panel-muted);
}

.cta-card {
  text-align: center;
  background:
    linear-gradient(180deg, var(--hero-glow), transparent 220px),
    var(--panel-solid);
}

.cta-card h2 {
  margin: 0;
  font-size: clamp(2.1rem, 4vw, 3.2rem);
}

.cta-card p {
  max-width: 720px;
  margin: 16px auto 0;
}

.site-footer {
  display: flex;
  justify-content: space-between;
  gap: 24px;
  margin-top: 88px;
  padding-top: 24px;
  border-top: 1px solid var(--line);
}

.site-footer p {
  margin: 0;
  font-size: 0.94rem;
}

@media (max-width: 980px) {
  .hero-grid,
  .promise-grid {
    grid-template-columns: 1fr;
  }

  .site-header,
  .site-footer,
  .section-heading {
    flex-direction: column;
    align-items: flex-start;
  }

  .theme-toggle {
    align-self: flex-start;
  }

  .site-header {
    padding-inline: 20px;
  }
}

@media (max-width: 720px) {
  .app-shell {
    width: min(100% - 20px, 1180px);
    padding-top: 0;
  }

  .site-header {
    padding: 14px 16px;
  }

  .site-nav {
    gap: 12px;
  }

  .site-nav a {
    font-size: 0.88rem;
  }

  .hero-grid,
  .steps-panel,
  .strip-card,
  .info-card,
  .scene-card,
  .promise-panel,
  .cta-card {
    border-radius: 18px;
  }

  .hero-grid {
    padding: 26px 20px;
  }

  .hero-copy h1,
  .section-heading h2,
  .promise-panel h2,
  .cta-card h2 {
    max-width: none;
  }

  .hero-copy h1 {
    font-size: clamp(2rem, 10vw, 3rem);
  }

  .hero-actions,
  .cta-actions {
    flex-direction: column;
  }

  .hero-actions .el-button,
  .cta-actions .el-button {
    width: 100%;
  }

  .scene-card .el-card__body {
    grid-template-columns: 1fr;
  }

  .steps-panel {
    overflow-x: auto;
  }

  .site-footer {
    margin-top: 72px;
    padding-bottom: 24px;
  }
}