:root {
  --bg: #07111f;
  --bg-alt: #0b1830;
  --panel: rgba(12, 24, 47, 0.72);
  --panel-strong: rgba(15, 29, 56, 0.94);
  --line: rgba(145, 189, 255, 0.16);
  --line-strong: rgba(145, 189, 255, 0.3);
  --text: #ebf2ff;
  --muted: #9db1cf;
  --accent: #77f2d5;
  --accent-soft: rgba(119, 242, 213, 0.15);
  --accent-warm: #ffc978;
  --shadow: 0 30px 80px rgba(2, 6, 18, 0.45);
  --radius-xl: 32px;
  --radius-lg: 24px;
  --radius-md: 18px;
  --container: 1180px;
  --font-ui: "Outfit", "Noto Sans SC", sans-serif;
  --font-body: "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
}

/* =========================
   微光阳公开学习版 2.0
   ========================= */

.learning-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1rem;
}

.learning-card {
  display: flex;
  min-height: 15rem;
  flex-direction: column;
  justify-content: space-between;
  gap: 1.2rem;
  padding: 1.35rem;
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  background:
    radial-gradient(circle at 16% 10%, rgba(119, 242, 213, 0.12), transparent 30%),
    linear-gradient(180deg, rgba(15, 29, 56, 0.86), rgba(8, 18, 34, 0.74));
  box-shadow: 0 20px 60px rgba(1, 6, 18, 0.24);
  transition: transform 0.2s ease, border-color 0.2s ease, background-color 0.2s ease;
}

.learning-card:hover,
.learning-card:focus-visible {
  transform: translateY(-3px);
  border-color: var(--line-strong);
}

.learning-card span {
  width: fit-content;
  padding: 0.35rem 0.62rem;
  border: 1px solid rgba(119, 242, 213, 0.22);
  border-radius: 999px;
  color: var(--accent);
  font-family: var(--font-ui);
  font-size: 0.78rem;
  letter-spacing: 0.08em;
}

.learning-card h3 {
  margin: auto 0 0;
  font-family: var(--font-ui);
  font-size: 1.45rem;
}

.learning-card p {
  margin: 0;
  color: var(--muted);
  line-height: 1.7;
}

.learning-card-wide {
  grid-column: span 3;
  min-height: 11rem;
}

.layer-grid {
  grid-template-columns: repeat(4, 1fr);
}

.day-grid,
.template-grid,
.compare-grid,
.check-grid {
  display: grid;
  gap: 1rem;
}

.day-grid,
.check-grid {
  grid-template-columns: repeat(7, 1fr);
}

.template-grid,
.compare-grid {
  grid-template-columns: repeat(2, 1fr);
}

.template-grid .template-card:first-child {
  grid-column: span 2;
}

.day-card,
.template-card,
.check-card {
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  background: rgba(12, 24, 47, 0.68);
  box-shadow: 0 18px 52px rgba(1, 6, 18, 0.22);
}

.day-card {
  min-height: 13rem;
  padding: 1rem;
}

.day-card span,
.check-card span {
  display: inline-flex;
  margin-bottom: 1rem;
  color: var(--accent);
  font-family: var(--font-ui);
  font-size: 0.78rem;
  letter-spacing: 0.08em;
}

.day-card h3,
.template-card h3 {
  margin: 0 0 0.7rem;
  font-family: var(--font-ui);
}

.day-card h3 {
  font-size: 1.05rem;
}

.template-card h3 {
  font-size: 1.18rem;
}

.day-card p,
.template-card p,
.check-card p,
.compare-card p {
  margin: 0;
  color: var(--muted);
  line-height: 1.7;
}

.template-card,
.check-card {
  padding: 1rem;
}

.check-card {
  min-height: 9rem;
}

.practice-grid {
  margin: 1rem 0;
}

.double-link-note {
  margin-top: 2rem;
}

.example-block,
.folder-tree,
.mini-code {
  overflow-x: auto;
  margin: 0;
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  background: rgba(4, 11, 22, 0.72);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.04);
}

.example-block,
.folder-tree {
  padding: 1.35rem;
}

.mini-code {
  padding: 1rem;
}

.example-block code,
.folder-tree code,
.mini-code code {
  color: #d7e6ff;
  font-family: "SFMono-Regular", Consolas, "Liberation Mono", monospace;
  font-size: 0.92rem;
  line-height: 1.8;
  white-space: pre;
}

@media (max-width: 1180px) {
  .nav-menu {
    gap: 0.35rem;
  }

  .nav-menu a {
    padding: 0.48rem 0.55rem;
    font-size: 0.86rem;
  }
}

@media (max-width: 1080px) {
  .learning-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .learning-card-wide {
    grid-column: span 2;
  }

  .layer-grid,
  .day-grid,
  .check-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 640px) {
  .learning-grid,
  .layer-grid,
  .day-grid,
  .template-grid,
  .compare-grid,
  .check-grid {
    grid-template-columns: 1fr;
  }

  .learning-card,
  .learning-card-wide {
    grid-column: auto;
    min-height: 12rem;
    padding: 1.1rem;
  }

  .template-grid .template-card:first-child {
    grid-column: auto;
  }

  .day-card,
  .check-card {
    min-height: auto;
  }

  .example-block,
  .folder-tree {
    padding: 1rem;
  }

  .example-block code,
  .folder-tree code,
  .mini-code code {
    font-size: 0.82rem;
  }
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: var(--font-body);
  color: var(--text);
  background:
    radial-gradient(circle at top, rgba(58, 111, 229, 0.16), transparent 32%),
    radial-gradient(circle at 85% 20%, rgba(119, 242, 213, 0.12), transparent 22%),
    linear-gradient(180deg, #06101d 0%, #081425 34%, #06111f 100%);
  min-height: 100vh;
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  background:
    linear-gradient(rgba(255, 255, 255, 0.02) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.02) 1px, transparent 1px);
  background-size: 72px 72px;
  mask-image: radial-gradient(circle at center, black 48%, transparent 95%);
  opacity: 0.28;
}

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

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

.site-shell {
  position: relative;
  overflow: hidden;
}

.container {
  width: min(var(--container), calc(100% - 2rem));
  margin: 0 auto;
}

.section {
  position: relative;
  padding: 6.2rem 0;
}

.section-heading {
  max-width: 760px;
  margin-bottom: 2.5rem;
}

.section-heading.narrow {
  max-width: 720px;
}

.section-heading h2,
.about-copy h2,
.action-box h2,
.milestone-copy h2 {
  margin: 0;
  font-family: var(--font-ui);
  font-size: clamp(2rem, 4vw, 3.2rem);
  line-height: 1.08;
  letter-spacing: -0.03em;
}

.section-heading p,
.about-copy p,
.action-box p,
.milestone-copy p,
.footer-note,
.hero-text {
  color: var(--muted);
  line-height: 1.8;
  font-size: 1rem;
}

.eyebrow,
.preview-label,
.reserve-label,
.panel-tag {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  margin: 0 0 1rem;
  color: var(--accent);
  font-size: 0.88rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.eyebrow::before,
.preview-label::before,
.reserve-label::before,
.panel-tag::before {
  content: "";
  width: 0.65rem;
  height: 0.65rem;
  border-radius: 999px;
  background: radial-gradient(circle, var(--accent) 0%, rgba(119, 242, 213, 0.1) 72%);
  box-shadow: 0 0 18px rgba(119, 242, 213, 0.7);
}

.topbar {
  position: sticky;
  top: 0;
  z-index: 30;
  padding: 1rem 0;
  backdrop-filter: blur(18px);
  background: linear-gradient(180deg, rgba(6, 16, 29, 0.78), rgba(6, 16, 29, 0.2));
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.95rem 1.2rem;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: rgba(7, 17, 31, 0.68);
  box-shadow: var(--shadow);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.9rem;
  min-width: 0;
}

.brand-mark {
  width: 2.7rem;
  height: 2.7rem;
  border-radius: 50%;
  background:
    radial-gradient(circle at 30% 30%, rgba(255, 255, 255, 0.85), transparent 25%),
    linear-gradient(135deg, rgba(119, 242, 213, 0.85), rgba(77, 122, 255, 0.8));
  box-shadow:
    inset 0 0 0 1px rgba(255, 255, 255, 0.25),
    0 0 24px rgba(119, 242, 213, 0.35);
}

.brand-text {
  display: flex;
  flex-direction: column;
  gap: 0.2rem;
  min-width: 0;
}

.brand-text strong {
  font-family: var(--font-ui);
  font-size: 1rem;
}

.brand-text span:last-child {
  color: var(--muted);
  font-size: 0.8rem;
}

.nav-menu {
  display: flex;
  align-items: center;
  gap: 1.1rem;
}

.nav-menu a {
  color: var(--muted);
  font-size: 0.94rem;
  transition: color 0.2s ease, transform 0.2s ease, background-color 0.2s ease, border-color 0.2s ease;
  border: 1px solid transparent;
  border-radius: 999px;
  padding: 0.52rem 0.78rem;
}

.nav-menu a:hover,
.nav-menu a:focus-visible {
  color: var(--text);
  transform: translateY(-1px);
}

.nav-menu a.is-current,
.nav-menu a[aria-current="page"] {
  color: var(--text);
  border-color: rgba(119, 242, 213, 0.18);
  background: rgba(119, 242, 213, 0.08);
  box-shadow: 0 0 0 1px rgba(119, 242, 213, 0.03);
}

.nav-menu a.nav-future {
  color: rgba(198, 213, 235, 0.56);
}

.nav-cta {
  padding: 0.82rem 1.2rem;
  border-radius: 999px;
  background: linear-gradient(135deg, rgba(119, 242, 213, 0.2), rgba(255, 201, 120, 0.2));
  border: 1px solid rgba(255, 255, 255, 0.12);
  color: var(--text) !important;
}

.nav-home-link {
  color: rgba(235, 242, 255, 0.78) !important;
  border-color: rgba(255, 201, 120, 0.18) !important;
  background: rgba(255, 201, 120, 0.08);
}

.nav-toggle {
  display: none;
  width: 3rem;
  height: 3rem;
  padding: 0;
  border: 1px solid var(--line);
  border-radius: 50%;
  background: rgba(9, 20, 37, 0.9);
  color: var(--text);
}

.nav-toggle span {
  display: block;
  width: 1.15rem;
  height: 2px;
  margin: 0.24rem auto;
  background: currentColor;
  border-radius: 999px;
}

.hero {
  padding-top: 2.4rem;
}

.hero-grid,
.about-grid {
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  gap: 2.5rem;
  align-items: center;
}

.hero-copy h1 {
  margin: 0;
  font-family: var(--font-ui);
  font-size: clamp(2.6rem, 4.55vw, 4.18rem);
  line-height: 1.13;
  letter-spacing: -0.045em;
  max-width: 13ch;
}

.hero-text {
  max-width: 56ch;
  margin: 1.8rem 0 0;
  font-size: 1.02rem;
  line-height: 1.88;
  color: #c4d4ea;
}

.hero-actions,
.action-buttons {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  margin-top: 2rem;
}

.button {
  display: inline-flex;
  justify-content: center;
  align-items: center;
  min-height: 3.25rem;
  padding: 0.95rem 1.35rem;
  border-radius: 999px;
  border: 1px solid transparent;
  font-weight: 700;
  transition: transform 0.25s ease, box-shadow 0.25s ease, border-color 0.25s ease, background 0.25s ease;
}

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

.button.primary {
  background: linear-gradient(135deg, #79f2d8 0%, #8eb9ff 100%);
  color: #04111d;
  box-shadow: 0 16px 36px rgba(119, 242, 213, 0.22);
}

.button.secondary,
.button.ghost {
  border-color: var(--line-strong);
  background: rgba(10, 21, 41, 0.8);
  color: var(--text);
}

.button.ghost {
  background: transparent;
}

.button.is-disabled {
  opacity: 0.72;
  cursor: default;
  pointer-events: none;
}

.hero-notes {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-top: 1.6rem;
}

.hero-guides {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 0.95rem;
  margin-top: 1.6rem;
}

.guide-card {
  display: grid;
  gap: 0.45rem;
  padding: 1rem 1rem 1.1rem;
  border: 1px solid rgba(145, 189, 255, 0.14);
  border-radius: 22px;
  background: linear-gradient(180deg, rgba(11, 24, 46, 0.72), rgba(9, 19, 36, 0.44));
  color: var(--text);
  transition: transform 0.22s ease, border-color 0.22s ease, background 0.22s ease;
}

.guide-card:hover,
.guide-card:focus-visible {
  transform: translateY(-2px);
  border-color: rgba(119, 242, 213, 0.34);
}

.guide-card strong {
  font-family: var(--font-ui);
  font-size: 1rem;
  line-height: 1.3;
}

.guide-card span:last-child {
  color: var(--muted);
  font-size: 0.9rem;
  line-height: 1.6;
}

.guide-kicker {
  color: var(--accent);
  font-size: 0.8rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.guide-card-new {
  background: linear-gradient(180deg, rgba(16, 34, 60, 0.88), rgba(11, 23, 40, 0.68));
  box-shadow: 0 18px 40px rgba(10, 22, 44, 0.36);
}

.note-chip {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  padding: 0.72rem 1rem;
  border-radius: 999px;
  border: 1px solid var(--line);
  background: rgba(8, 18, 34, 0.72);
  color: #c7d5ec;
  font-size: 0.94rem;
}

.note-dot {
  width: 0.5rem;
  height: 0.5rem;
  border-radius: 50%;
  background: var(--accent-warm);
  box-shadow: 0 0 14px rgba(255, 201, 120, 0.8);
}

.hero-visual {
  position: relative;
  min-height: 39rem;
  isolation: isolate;
}

.orbit-glow {
  position: absolute;
  border-radius: 50%;
  filter: blur(12px);
}

.orbit-a {
  inset: 4% auto auto 10%;
  width: 18rem;
  height: 18rem;
  background: radial-gradient(circle, rgba(77, 122, 255, 0.3), transparent 70%);
}

.orbit-b {
  right: 0;
  bottom: 8%;
  width: 15rem;
  height: 15rem;
  background: radial-gradient(circle, rgba(119, 242, 213, 0.22), transparent 72%);
}

.soft-card,
.feature-card,
.path-card,
.preview-card,
.reserve-card,
.action-box,
.milestone-shell,
.portrait-card {
  border: 1px solid var(--line);
  background: linear-gradient(180deg, rgba(13, 24, 46, 0.9), rgba(8, 17, 32, 0.76));
  box-shadow: var(--shadow);
  backdrop-filter: blur(14px);
}

.journey-visual {
  position: relative;
  min-height: 39rem;
}

.journey-core {
  position: absolute;
  inset: 1.5rem 4.5rem 7rem 0;
  padding: 0;
  border-radius: 36px;
  border: 1px solid rgba(145, 189, 255, 0.14);
  background: linear-gradient(180deg, rgba(13, 25, 48, 0.82), rgba(7, 16, 31, 0.58));
  box-shadow: var(--shadow);
  overflow: hidden;
}

.journey-media {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(180deg, rgba(7, 15, 28, 0.18), rgba(7, 15, 28, 0.54)),
    url("./assets/hero-composite.png");
  background-size: cover, 200% 100%;
  background-position: center, left center;
  background-repeat: no-repeat;
  filter: brightness(1.08) saturate(1.02);
}

.journey-media::after {
  content: "";
  position: absolute;
  inset: 0;
  background:
    linear-gradient(90deg, rgba(7, 15, 28, 0.22) 0%, rgba(7, 15, 28, 0.1) 28%, rgba(7, 15, 28, 0.16) 100%),
    linear-gradient(180deg, rgba(7, 15, 28, 0.04), rgba(7, 15, 28, 0.14) 58%, rgba(7, 15, 28, 0.3) 100%);
}

.journey-tag-wrap {
  position: absolute;
  z-index: 1;
  left: 1.1rem;
  bottom: 0.95rem;
}

.journey-tag {
  margin: 0;
  padding: 0.46rem 0.76rem;
  border-radius: 999px;
  background: rgba(7, 15, 28, 0.22);
  border: 1px solid rgba(255, 255, 255, 0.08);
  backdrop-filter: blur(8px);
  font-size: 0.74rem;
}

.journey-tag::before {
  width: 0.5rem;
  height: 0.5rem;
  box-shadow: 0 0 12px rgba(119, 242, 213, 0.5);
}

.journey-bridge {
  position: absolute;
  z-index: 2;
  left: 1.2rem;
  bottom: 16.2rem;
  width: 12.8rem;
  pointer-events: none;
}

.journey-bridge h3 {
  margin: 0;
  font-family: var(--font-ui);
  font-size: clamp(1.08rem, 1.35vw, 1.28rem);
  line-height: 1.32;
  letter-spacing: -0.03em;
  color: #eef4ff;
  text-shadow: 0 10px 30px rgba(5, 10, 20, 0.4);
}

.compass-card,
.milestone-badge,
.path-card,
.preview-card,
.reserve-card {
  border-radius: var(--radius-lg);
}

.compass-card {
  position: absolute;
  right: 0;
  bottom: 2.2rem;
  width: min(17.4rem, 80%);
  min-height: 16.2rem;
  border: 1px solid rgba(145, 189, 255, 0.14);
  background: linear-gradient(180deg, rgba(15, 29, 54, 0.9), rgba(8, 17, 32, 0.76));
  box-shadow: var(--shadow);
  overflow: hidden;
}

.compass-media {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(180deg, rgba(7, 15, 28, 0.1), rgba(7, 15, 28, 0.46)),
    url("./assets/hero-composite.png");
  background-size: cover, 200% 100%;
  background-position: center, right center;
  background-repeat: no-repeat;
}

.compass-media::after {
  content: "";
  position: absolute;
  inset: 0;
  background:
    linear-gradient(180deg, rgba(7, 15, 28, 0.02) 38%, rgba(7, 15, 28, 0.22) 58%, rgba(7, 15, 28, 0.42) 100%),
    linear-gradient(90deg, rgba(7, 15, 28, 0.1), transparent 28%, rgba(7, 15, 28, 0.12));
}

.compass-copy {
  position: absolute;
  left: 0.85rem;
  right: 0.85rem;
  bottom: 0.8rem;
  padding: 0.62rem 0.78rem;
  border-radius: 16px;
  border: 1px solid rgba(255, 255, 255, 0.06);
  background: rgba(7, 15, 28, 0.18);
  backdrop-filter: blur(8px);
}

.compass-copy span {
  display: block;
  margin-bottom: 0.22rem;
  color: #c0d3ef;
  font-size: 0.78rem;
  letter-spacing: 0.04em;
}

.compass-copy strong {
  font-family: var(--font-ui);
  font-size: 0.92rem;
  line-height: 1.34;
  font-weight: 600;
}

.comfort {
  padding-top: 2.4rem;
}

.comfort-grid,
.value-grid,
.preview-grid,
.expansion-grid {
  display: grid;
  gap: 1.25rem;
}

.comfort-grid {
  grid-template-columns: repeat(4, minmax(0, 1fr));
}

.soft-card {
  padding: 1.5rem;
  border-radius: var(--radius-lg);
  background: linear-gradient(180deg, rgba(13, 24, 46, 0.72), rgba(9, 18, 34, 0.44));
}

.soft-card h3,
.feature-card h3,
.path-card h3,
.preview-card h3,
.reserve-card h3 {
  margin: 1rem 0 0.6rem;
  font-family: var(--font-ui);
  font-size: 1.25rem;
}

.soft-card p,
.feature-card p,
.path-card p,
.preview-card p,
.reserve-card p {
  margin: 0;
  color: var(--muted);
  line-height: 1.7;
}

.card-icon {
  display: grid;
  place-items: center;
  width: 3rem;
  height: 3rem;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(119, 242, 213, 0.25), rgba(119, 242, 213, 0.08));
  color: var(--accent);
  font-size: 1.15rem;
}

.value-grid {
  grid-template-columns: 1.3fr 1fr 1fr;
  align-items: stretch;
}

.feature-card {
  padding: 1.4rem;
  min-height: 15rem;
  border-radius: var(--radius-xl);
}

.feature-wide {
  grid-row: span 2;
}

.feature-visual.horizon {
  position: relative;
  min-height: 16rem;
  margin-bottom: 1rem;
  border-radius: var(--radius-lg);
  overflow: hidden;
  background:
    linear-gradient(180deg, rgba(118, 164, 255, 0.16), rgba(119, 242, 213, 0.02)),
    radial-gradient(circle at bottom, rgba(255, 201, 120, 0.22), transparent 48%),
    rgba(255, 255, 255, 0.02);
}

.horizon-stage {
  position: relative;
  width: 100%;
  height: 100%;
  padding: 1rem;
}

.horizon-window {
  position: absolute;
  inset: auto;
  bottom: 20%;
  width: 22%;
  height: 46%;
  border-radius: 20px 20px 10px 10px;
  border: 1px solid rgba(255, 255, 255, 0.16);
  background: rgba(255, 255, 255, 0.05);
}

.horizon-window.one {
  left: 10%;
}

.horizon-window.two {
  left: 36%;
  height: 58%;
}

.horizon-window.three {
  left: 62%;
  width: 20%;
  height: 42%;
}

.signal-card {
  position: absolute;
  padding: 0.9rem 1rem;
  border-radius: 18px;
  background: rgba(8, 17, 32, 0.58);
  border: 1px solid rgba(255, 255, 255, 0.12);
  backdrop-filter: blur(12px);
}

.signal-card small {
  display: block;
  color: var(--muted);
  margin-bottom: 0.35rem;
}

.signal-card strong {
  font-family: var(--font-ui);
  font-size: 0.95rem;
  line-height: 1.4;
}

.signal-main {
  left: 1rem;
  top: 1rem;
  width: 48%;
}

.signal-side {
  right: 1rem;
  bottom: 1rem;
  width: 38%;
}

.horizon-stage::before {
  content: "";
  position: absolute;
  left: 1rem;
  right: 1rem;
  bottom: 0.9rem;
  height: 2.6rem;
  border-radius: 999px;
  background:
    linear-gradient(90deg, rgba(255, 255, 255, 0.06), rgba(255, 255, 255, 0.02)),
    rgba(8, 17, 32, 0.36);
  border: 1px solid rgba(255, 255, 255, 0.08);
}

.horizon-stage::after {
  content: "";
  position: absolute;
  left: 12%;
  right: 12%;
  top: 58%;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(255, 201, 120, 0.4), transparent);
}

.feature-badge {
  display: inline-flex;
  align-items: center;
  padding: 0.45rem 0.8rem;
  border-radius: 999px;
  background: rgba(119, 242, 213, 0.1);
  color: var(--accent);
  font-size: 0.82rem;
  margin-bottom: 1.1rem;
}

.path-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 1.1rem;
  position: relative;
}

.path-grid::before {
  content: "";
  position: absolute;
  left: 10%;
  right: 10%;
  top: 2.2rem;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(119, 242, 213, 0.52), transparent);
}

.path-card {
  position: relative;
  padding: 2rem 1.4rem 1.6rem;
}

.path-index {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 3rem;
  height: 3rem;
  border-radius: 50%;
  margin-bottom: 1.5rem;
  background: linear-gradient(135deg, rgba(119, 242, 213, 0.18), rgba(77, 122, 255, 0.18));
  border: 1px solid rgba(119, 242, 213, 0.24);
  color: var(--text);
  font-family: var(--font-ui);
  font-weight: 700;
}

.milestone-shell {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 2rem;
  align-items: center;
  padding: 2rem;
  border-radius: var(--radius-xl);
  background:
    radial-gradient(circle at 20% 20%, rgba(255, 201, 120, 0.08), transparent 24%),
    linear-gradient(180deg, rgba(14, 24, 46, 0.85), rgba(8, 17, 32, 0.65));
}

.milestone-badge {
  position: relative;
  display: grid;
  place-items: center;
  min-height: 18rem;
  background:
    radial-gradient(circle, rgba(255, 201, 120, 0.15), transparent 40%),
    linear-gradient(180deg, rgba(20, 33, 60, 0.95), rgba(7, 15, 28, 0.9));
}

.badge-ring {
  position: absolute;
  width: 12rem;
  height: 12rem;
  border-radius: 50%;
  border: 1px solid rgba(255, 201, 120, 0.28);
  box-shadow:
    0 0 0 1rem rgba(255, 201, 120, 0.04),
    0 0 90px rgba(255, 201, 120, 0.14);
}

.badge-core {
  position: relative;
  text-align: center;
}

.badge-core small {
  display: block;
  margin-bottom: 0.7rem;
  color: var(--muted);
}

.badge-core strong {
  font-family: var(--font-ui);
  font-size: 2rem;
}

.preview-grid {
  grid-template-columns: 1.2fr 1fr 1fr;
  align-items: stretch;
}

.preview-lead {
  grid-row: span 2;
}

.preview-card {
  overflow: hidden;
}

.preview-visual {
  min-height: 12rem;
  border-bottom: 1px solid var(--line);
  background-size: cover;
  background-position: center;
  position: relative;
  overflow: hidden;
}

.preview-copy {
  padding: 1.35rem;
}

.preview-copy a {
  display: inline-block;
  margin-top: 1rem;
  color: var(--accent);
  font-weight: 700;
}

.preview-scene {
  position: absolute;
  inset: 0;
}

.preview-scene-start {
  padding: 1rem;
}

.scene-window,
.mini-window {
  position: absolute;
  border-radius: 18px;
  border: 1px solid rgba(255, 255, 255, 0.14);
  background: rgba(8, 17, 32, 0.52);
  backdrop-filter: blur(14px);
}

.scene-window {
  top: 1rem;
  left: 1rem;
  width: min(70%, 15rem);
  padding: 0.95rem 1rem;
}

.scene-window small,
.mini-window {
  color: var(--muted);
}

.scene-window strong {
  display: block;
  margin-top: 0.45rem;
  font-family: var(--font-ui);
  line-height: 1.4;
}

.scene-list {
  position: absolute;
  right: 1rem;
  bottom: 1rem;
  display: grid;
  gap: 0.55rem;
}

.scene-list span,
.faq-pill {
  display: inline-flex;
  align-items: center;
  padding: 0.55rem 0.8rem;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.1);
  font-size: 0.84rem;
}

.mini-window {
  left: 1rem;
  bottom: 1rem;
  padding: 0.85rem 0.95rem;
  width: calc(100% - 2rem);
  line-height: 1.55;
}

.stack-icons {
  position: absolute;
  top: 1rem;
  right: 1rem;
  display: flex;
  gap: 0.6rem;
}

.stack-icons span {
  width: 2.5rem;
  height: 2.5rem;
  border-radius: 18px;
  background: linear-gradient(135deg, rgba(119, 242, 213, 0.25), rgba(142, 185, 255, 0.18));
  border: 1px solid rgba(255, 255, 255, 0.14);
}

.ai-orbit {
  position: absolute;
  top: 1.2rem;
  right: 1.3rem;
  width: 5.8rem;
  height: 5.8rem;
}

.ai-dot,
.ai-ring {
  position: absolute;
  inset: 0;
  border-radius: 50%;
}

.ai-ring {
  border: 1px solid rgba(119, 242, 213, 0.2);
  box-shadow: 0 0 0 0.7rem rgba(119, 242, 213, 0.03);
}

.ai-dot {
  inset: 32%;
  background: radial-gradient(circle, rgba(255, 255, 255, 0.72), rgba(119, 242, 213, 0.7));
  box-shadow: 0 0 24px rgba(119, 242, 213, 0.35);
}

.visual-faq .preview-scene {
  display: flex;
  flex-wrap: wrap;
  align-content: center;
  gap: 0.7rem;
  padding: 1rem;
}

.visual-start {
  background:
    radial-gradient(circle at 30% 30%, rgba(119, 242, 213, 0.32), transparent 24%),
    linear-gradient(180deg, rgba(118, 164, 255, 0.25), rgba(8, 17, 32, 0.45)),
    linear-gradient(90deg, rgba(255, 255, 255, 0.05) 1px, transparent 1px),
    linear-gradient(rgba(255, 255, 255, 0.05) 1px, transparent 1px);
  background-size: auto, auto, 42px 42px, 42px 42px;
}

.visual-tools {
  background:
    linear-gradient(135deg, rgba(255, 201, 120, 0.16), rgba(119, 242, 213, 0.08)),
    radial-gradient(circle at 72% 32%, rgba(119, 242, 213, 0.2), transparent 24%);
}

.visual-ai {
  background:
    linear-gradient(135deg, rgba(142, 185, 255, 0.18), rgba(119, 242, 213, 0.08)),
    radial-gradient(circle at 28% 68%, rgba(255, 255, 255, 0.12), transparent 22%);
}

.visual-faq {
  background:
    linear-gradient(135deg, rgba(255, 201, 120, 0.12), rgba(142, 185, 255, 0.08)),
    radial-gradient(circle at 72% 40%, rgba(255, 201, 120, 0.18), transparent 22%);
}

.about-grid {
  gap: 3rem;
  align-items: stretch;
}

.about-portrait {
  position: relative;
  min-height: 25rem;
}

.portrait-glow {
  position: absolute;
  inset: 2rem 3rem 2rem 1rem;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(119, 242, 213, 0.18), transparent 66%);
  filter: blur(16px);
}

.portrait-card {
  position: relative;
  display: grid;
  grid-template-rows: auto 1fr;
  min-height: 25rem;
  padding: 1.4rem;
  border-radius: var(--radius-xl);
  overflow: hidden;
  background:
    radial-gradient(circle at 20% 20%, rgba(255, 201, 120, 0.08), transparent 25%),
    linear-gradient(180deg, rgba(14, 25, 48, 0.88), rgba(8, 17, 32, 0.72));
}

.portrait-stack {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.portrait-figure {
  position: relative;
  flex: 0 0 13rem;
  width: 13rem;
  aspect-ratio: 0.83;
  border-radius: 28px;
  overflow: hidden;
  border: 1px solid rgba(255, 255, 255, 0.12);
  background:
    radial-gradient(circle at top, rgba(119, 242, 213, 0.14), transparent 28%),
    linear-gradient(180deg, rgba(15, 27, 49, 0.38), rgba(7, 15, 28, 0.78));
  box-shadow:
    0 0 42px rgba(119, 242, 213, 0.12),
    inset 0 1px 0 rgba(255, 255, 255, 0.06);
}

.portrait-image {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center 24%;
  transform: scale(1.02);
  filter: saturate(0.96) contrast(1.02);
}

.portrait-figure::after {
  content: "";
  position: absolute;
  inset: 0;
  background:
    linear-gradient(180deg, rgba(7, 15, 28, 0.02) 35%, rgba(7, 15, 28, 0.68) 100%),
    linear-gradient(90deg, rgba(7, 15, 28, 0.14), transparent 36%, transparent 74%, rgba(7, 15, 28, 0.14));
  pointer-events: none;
}

.portrait-overlay {
  position: absolute;
  left: 0.85rem;
  right: 0.85rem;
  bottom: 0.85rem;
  padding: 0.8rem 0.9rem;
  border-radius: 18px;
  border: 1px solid rgba(255, 255, 255, 0.1);
  background: rgba(7, 15, 28, 0.38);
  backdrop-filter: blur(12px);
}

.portrait-overlay span {
  display: block;
  color: #bdd1ed;
  font-size: 0.76rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.portrait-overlay strong {
  display: block;
  margin-top: 0.35rem;
  font-family: var(--font-ui);
  line-height: 1.4;
}

.portrait-notes {
  display: grid;
  gap: 0.55rem;
  max-width: 16rem;
}

.portrait-notes span:first-child {
  color: var(--accent);
  font-size: 0.82rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.portrait-notes span:last-child {
  color: #d9e6f8;
  line-height: 1.7;
}

.portrait-desk {
  display: grid;
  align-content: end;
  gap: 1rem;
  margin-top: 1.5rem;
}

.desk-card {
  padding: 1rem 1rem 1.05rem;
  border-radius: 18px;
  border: 1px solid rgba(255, 255, 255, 0.1);
  background: rgba(255, 255, 255, 0.05);
}

.desk-card small {
  display: block;
  margin-bottom: 0.4rem;
  color: var(--muted);
}

.desk-card strong {
  font-family: var(--font-ui);
  line-height: 1.45;
}

.desk-card-side {
  margin-left: 2rem;
}

.expansion-grid {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.reserve-card,
.action-box {
  padding: 1.5rem;
}

.reserve-card {
  background: linear-gradient(180deg, rgba(12, 23, 45, 0.78), rgba(8, 17, 32, 0.54));
}

.action-box {
  border-radius: var(--radius-xl);
  text-align: center;
}

.action-box p {
  max-width: 40rem;
  margin-left: auto;
  margin-right: auto;
}

.action-buttons {
  justify-content: center;
}

.footer {
  padding: 2rem 0 3rem;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 1.5rem;
  padding: 2rem;
  border-top: 1px solid var(--line);
}

.footer-brand {
  margin-bottom: 1rem;
}

.footer-links {
  display: flex;
  flex-direction: column;
  gap: 1rem;
  align-items: flex-start;
}

.footer-links a {
  color: var(--muted);
}

.footer-links a:hover,
.footer-links a:focus-visible {
  color: var(--text);
}

[data-reveal] {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity 0.65s ease, transform 0.65s ease;
}

[data-reveal].is-visible {
  opacity: 1;
  transform: translateY(0);
}

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

  [data-reveal] {
    opacity: 1;
    transform: none;
    transition: none;
  }

  .button,
  .nav-menu a {
    transition: none;
  }
}

@media (max-width: 1080px) {
  .hero-grid,
  .about-grid,
  .milestone-shell,
  .footer-grid,
  .value-grid,
  .preview-grid,
  .comfort-grid,
  .path-grid,
  .expansion-grid {
    grid-template-columns: 1fr 1fr;
  }

  .hero-copy h1 {
    max-width: 12ch;
  }

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

  .preview-lead,
  .feature-wide {
    grid-row: span 1;
  }

  .path-grid::before {
    display: none;
  }
}

@media (max-width: 860px) {
  .nav {
    border-radius: 28px;
    padding: 1rem;
  }

  .nav-toggle {
    display: inline-block;
  }

  .nav-menu {
    position: absolute;
    top: calc(100% + 0.8rem);
    left: 1rem;
    right: 1rem;
    display: none;
    flex-direction: column;
    align-items: stretch;
    padding: 1rem;
    border: 1px solid var(--line);
    border-radius: 24px;
    background: rgba(7, 17, 31, 0.96);
    box-shadow: var(--shadow);
  }

  .nav-menu.is-open {
    display: flex;
  }

  .nav-menu a {
    padding: 0.85rem 0.5rem;
    font-size: 1rem;
  }

  .hero-grid,
  .about-grid,
  .milestone-shell,
  .footer-grid,
  .value-grid,
  .preview-grid,
  .comfort-grid,
  .path-grid,
  .expansion-grid {
    grid-template-columns: 1fr;
  }

  .section {
    padding: 4.6rem 0;
  }

  .hero-visual {
    min-height: 34rem;
  }

  .journey-visual {
    min-height: 34rem;
  }

  .journey-core {
    inset: 0 0 7rem;
  }

  .journey-bridge {
    left: 0.9rem;
    bottom: 17.6rem;
  }

  .compass-card {
    width: min(17rem, 78%);
  }
}

@media (max-width: 640px) {
  .container {
    width: min(var(--container), calc(100% - 1.1rem));
  }

  .topbar {
    padding-top: 0.6rem;
  }

  .nav {
    border-radius: 24px;
  }

  .brand-text span:last-child {
    display: none;
  }

  .hero {
    padding-top: 1.6rem;
  }

  .hero-copy h1 {
    font-size: clamp(2.18rem, 10vw, 3.2rem);
    max-width: none;
    line-height: 1.12;
  }

  .hero-text,
  .section-heading p,
  .about-copy p,
  .action-box p,
  .milestone-copy p {
    font-size: 0.98rem;
    line-height: 1.72;
  }

  .button {
    width: 100%;
  }

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

  .hero-notes {
    flex-direction: column;
  }

  .hero-guides {
    gap: 0.8rem;
  }

  .hero-visual {
    min-height: 25.5rem;
  }

  .journey-visual {
    min-height: 25.5rem;
  }

  .journey-core,
  .compass-card {
    position: relative;
    inset: auto;
    width: 100%;
  }

  .journey-core {
    min-height: 17rem;
    border-radius: 28px;
  }

  .journey-tag-wrap {
    left: 0.9rem;
    bottom: 0.8rem;
  }

  .journey-bridge {
    position: relative;
    right: auto;
    bottom: auto;
    width: auto;
    margin: 0.8rem 0 0.35rem;
    padding: 0 0.15rem;
  }

  .journey-bridge h3 {
    font-size: 1.08rem;
    line-height: 1.38;
  }

  .compass-card {
    min-height: 14.8rem;
    margin-top: 1rem;
  }

  .journey-media {
    background-size: cover, 235% 100%;
    background-position: center, 32% center;
    filter: brightness(1.1) saturate(1.02);
  }

  .compass-media {
    background-size: cover, 250% 100%;
    background-position: center, 72% center;
  }

  .compass-copy {
    left: 0.7rem;
    right: 0.7rem;
    bottom: 0.7rem;
  }

  .milestone-shell,
  .action-box,
  .soft-card,
  .feature-card,
  .path-card,
  .preview-copy,
  .reserve-card {
    padding-left: 1.15rem;
    padding-right: 1.15rem;
  }

  .milestone-badge {
    min-height: 14rem;
  }

  .badge-ring {
    width: 9rem;
    height: 9rem;
  }

  .scene-window {
    width: calc(100% - 2rem);
  }

  .scene-list {
    left: 1rem;
    right: 1rem;
  }

  .scene-list span,
  .faq-pill,
  .mini-window {
    font-size: 0.8rem;
  }

  .portrait-stack {
    flex-direction: column;
    align-items: flex-start;
  }

  .portrait-figure {
    width: 100%;
    flex-basis: auto;
    aspect-ratio: 1.1;
  }

  .portrait-image {
    object-position: center 20%;
  }

  .desk-card-side {
    margin-left: 0;
  }

  .footer-grid {
    padding: 1.5rem 0 0;
  }
}

/* =========================
   从零开始页面样式
   ========================= */

.page-shell {
  overflow: visible;
}

.start-hero {
  padding-top: 2.6rem;
}

.start-hero-shell {
  display: grid;
  grid-template-columns: 1.02fr 0.98fr;
  gap: 2rem;
  align-items: center;
  padding: 2rem;
  border: 1px solid var(--line);
  border-radius: 34px;
  background:
    radial-gradient(circle at 15% 15%, rgba(119, 242, 213, 0.12), transparent 24%),
    linear-gradient(180deg, rgba(12, 22, 43, 0.88), rgba(8, 17, 32, 0.72));
  box-shadow: var(--shadow);
}

.start-hero-copy h1 {
  margin: 0;
  font-family: var(--font-ui);
  font-size: clamp(2.5rem, 4.6vw, 4rem);
  line-height: 1.1;
  letter-spacing: -0.045em;
  max-width: 11ch;
}

.start-hero-text {
  max-width: 54ch;
  margin: 1.35rem 0 0;
  color: #bed0e9;
  line-height: 1.86;
}

.start-hero-notes {
  display: flex;
  flex-wrap: wrap;
  gap: 0.7rem;
  margin-top: 1.5rem;
}

.mini-note {
  display: inline-flex;
  align-items: center;
  min-height: 2.5rem;
  padding: 0.65rem 0.95rem;
  border-radius: 999px;
  border: 1px solid rgba(255, 255, 255, 0.1);
  background: rgba(255, 255, 255, 0.04);
  color: #d4e1f4;
  font-size: 0.92rem;
}

.start-hero-visual {
  position: relative;
  min-height: 23rem;
}

.fog-orbit {
  position: absolute;
  border-radius: 50%;
  filter: blur(16px);
}

.orbit-one {
  top: 8%;
  left: 4%;
  width: 12rem;
  height: 12rem;
  background: radial-gradient(circle, rgba(119, 242, 213, 0.18), transparent 66%);
}

.orbit-two {
  right: 0;
  bottom: 6%;
  width: 11rem;
  height: 11rem;
  background: radial-gradient(circle, rgba(142, 185, 255, 0.18), transparent 68%);
}

.clarity-board {
  position: absolute;
  inset: 0;
  border-radius: 30px;
  border: 1px solid rgba(145, 189, 255, 0.14);
  background:
    linear-gradient(180deg, rgba(9, 18, 34, 0.18), rgba(9, 18, 34, 0.78)),
    radial-gradient(circle at center, rgba(255, 255, 255, 0.04), transparent 56%);
  overflow: hidden;
}

.clarity-line {
  position: absolute;
  background: linear-gradient(90deg, rgba(119, 242, 213, 0.1), rgba(119, 242, 213, 0.52), rgba(142, 185, 255, 0.16));
  height: 1px;
}

.line-a {
  left: 18%;
  right: 18%;
  top: 35%;
}

.line-b {
  left: 22%;
  right: 22%;
  bottom: 28%;
}

.clarity-node {
  position: absolute;
  padding: 0.7rem 1rem;
  border-radius: 999px;
  border: 1px solid rgba(255, 255, 255, 0.1);
  background: rgba(255, 255, 255, 0.06);
  color: #eef4ff;
  font-weight: 600;
  backdrop-filter: blur(12px);
}

.node-a {
  top: 18%;
  left: 8%;
}

.node-b {
  top: 20%;
  right: 14%;
}

.node-c {
  top: 44%;
  left: 24%;
}

.node-d {
  top: 44%;
  right: 18%;
}

.node-e {
  bottom: 15%;
  left: 16%;
}

.node-f {
  bottom: 14%;
  right: 24%;
}

.reason-grid,
.role-board,
.relation-grid,
.next-grid {
  display: grid;
  gap: 1.15rem;
}

.reason-grid {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.reason-card,
.role-cluster,
.term-card,
.relation-panel,
.compare-card,
.summary-card,
.next-card {
  border: 1px solid var(--line);
  background: linear-gradient(180deg, rgba(13, 24, 46, 0.84), rgba(8, 17, 32, 0.64));
  box-shadow: var(--shadow);
  backdrop-filter: blur(14px);
}

.reason-card {
  padding: 1.4rem;
  border-radius: 24px;
}

.reason-icon {
  display: grid;
  place-items: center;
  width: 2.8rem;
  height: 2.8rem;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(119, 242, 213, 0.22), rgba(119, 242, 213, 0.06));
  color: var(--accent);
  font-size: 1rem;
}

.reason-card h3,
.group-heading h3,
.relation-head h3,
.compare-a,
.compare-b,
.next-card h3 {
  margin: 1rem 0 0.55rem;
  font-family: var(--font-ui);
}

.reason-card p,
.cluster-label,
.group-kicker,
.relation-lead,
.relation-note,
.compare-card p,
.summary-card p,
.next-card p {
  margin: 0;
  color: var(--muted);
  line-height: 1.72;
}

.role-board {
  grid-template-columns: 1.2fr 1fr 0.95fr;
  align-items: start;
}

.role-cluster {
  padding: 1.35rem;
  border-radius: 24px;
  background: linear-gradient(180deg, rgba(12, 22, 43, 0.56), rgba(8, 17, 32, 0.42));
  box-shadow: none;
  border-color: rgba(145, 189, 255, 0.1);
}

.role-cluster-soft {
  background: linear-gradient(180deg, rgba(10, 20, 39, 0.36), rgba(8, 17, 32, 0.24));
  border-style: dashed;
}

.cluster-label {
  margin-bottom: 0.85rem;
  color: var(--accent);
  font-size: 0.88rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.cluster-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.7rem;
}

.cluster-tags span {
  display: inline-flex;
  align-items: center;
  min-height: 2.35rem;
  padding: 0.62rem 0.9rem;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(255, 255, 255, 0.08);
}

.term-group + .term-group {
  margin-top: 3.4rem;
}

.group-heading {
  margin-bottom: 1.25rem;
}

.group-kicker {
  color: var(--accent);
  font-size: 0.82rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.term-grid {
  display: grid;
  gap: 1rem;
}

.term-grid-connection {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.term-grid-ai {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.term-card {
  border-radius: 28px;
  padding: 1.35rem 1.45rem;
}

.term-card-connection {
  background:
    radial-gradient(circle at top left, rgba(119, 242, 213, 0.08), transparent 30%),
    linear-gradient(180deg, rgba(13, 24, 46, 0.9), rgba(8, 17, 32, 0.72));
}

.term-card-ai {
  background:
    radial-gradient(circle at top left, rgba(142, 185, 255, 0.1), transparent 32%),
    linear-gradient(180deg, rgba(13, 24, 46, 0.9), rgba(8, 17, 32, 0.72));
}

.term-head {
  display: flex;
  align-items: center;
  gap: 0.9rem;
  margin-bottom: 1rem;
}

.term-icon {
  display: grid;
  place-items: center;
  width: 2.7rem;
  height: 2.7rem;
  border-radius: 18px;
  background: rgba(255, 255, 255, 0.06);
  color: var(--accent);
  font-size: 0.92rem;
  font-weight: 700;
}

.term-head h4 {
  margin: 0;
  font-family: var(--font-ui);
  font-size: 1.2rem;
}

.term-body {
  display: grid;
  gap: 0.75rem;
}

.term-body p {
  margin: 0;
  color: #c4d4ea;
  line-height: 1.64;
  font-size: 0.96rem;
}

.term-body strong {
  color: var(--text);
}

.relation-grid {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.relation-panel {
  border-radius: 28px;
  padding: 1.65rem;
  background:
    radial-gradient(circle at top right, rgba(119, 242, 213, 0.08), transparent 28%),
    linear-gradient(180deg, rgba(15, 27, 50, 0.92), rgba(8, 17, 32, 0.76));
  transform: translateY(0);
}

.relation-head {
  margin-bottom: 0.9rem;
}

.relation-head h3 {
  margin-top: 0.45rem;
  font-size: 1.4rem;
  line-height: 1.28;
}

.relation-lead {
  margin: 0 0 1rem;
  color: #c5d6ec;
  line-height: 1.72;
}

.relation-flow {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.65rem;
  margin-bottom: 1rem;
}

.flow-node,
.stack-node {
  border-radius: 18px;
  border: 1px solid rgba(255, 255, 255, 0.1);
  background: rgba(255, 255, 255, 0.05);
  color: #eff4ff;
}

.flow-node {
  flex: 1;
  padding: 1rem 0.85rem;
  text-align: center;
  font-weight: 700;
}

.flow-node-soft {
  color: #d6e3f7;
  background: rgba(255, 255, 255, 0.03);
  border-style: dashed;
}

.flow-arrow {
  color: var(--accent);
  font-size: 1.2rem;
  font-weight: 700;
}

.relation-stack {
  display: grid;
  gap: 0.7rem;
  margin-bottom: 1rem;
}

.stack-node {
  padding: 0.95rem 1rem;
}

.confusion-stack {
  display: grid;
  gap: 1rem;
}

.compare-card {
  display: grid;
  gap: 0.85rem;
  padding: 1.25rem 1.35rem;
  border-radius: 26px;
}

.compare-a,
.compare-b {
  margin: 0;
  font-size: 1.1rem;
}

.compare-divider {
  color: var(--accent-warm);
  font-family: var(--font-ui);
  font-size: 1.4rem;
  font-weight: 800;
}

.summary-card {
  border-radius: 30px;
  padding: 1.75rem;
  text-align: center;
  background:
    radial-gradient(circle at top, rgba(119, 242, 213, 0.05), transparent 26%),
    linear-gradient(180deg, rgba(12, 23, 45, 0.52), rgba(8, 17, 32, 0.34));
  box-shadow: none;
  border-color: rgba(145, 189, 255, 0.1);
}

.summary-card h2 {
  max-width: 18ch;
  margin: 0 auto 1rem;
  font-family: var(--font-ui);
  font-size: clamp(1.8rem, 3.5vw, 2.7rem);
  line-height: 1.18;
}

.summary-card p {
  max-width: 42rem;
  margin: 0 auto;
}

.next-grid {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.next-card {
  border-radius: 26px;
  padding: 1.4rem;
}

.next-label {
  color: var(--accent);
  font-size: 0.82rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.next-link {
  display: inline-flex;
  align-items: center;
  margin-top: 1rem;
  min-height: 2.6rem;
  padding: 0.68rem 0.92rem;
  border-radius: 999px;
  color: #c8d9ef;
  font-weight: 700;
  border: 1px solid rgba(255, 255, 255, 0.08);
  background: rgba(255, 255, 255, 0.05);
}

.next-link.is-disabled {
  opacity: 0.92;
  cursor: default;
}

@media (max-width: 1080px) {
  .start-hero-shell,
  .reason-grid,
  .role-board,
  .relation-grid,
  .next-grid,
  .term-grid-ai {
    grid-template-columns: 1fr 1fr;
  }

  .term-grid-connection {
    grid-template-columns: 1fr 1fr;
  }

  .role-cluster-soft {
    grid-column: span 2;
  }
}

@media (max-width: 860px) {
  .start-hero-shell,
  .reason-grid,
  .role-board,
  .relation-grid,
  .next-grid,
  .term-grid-connection,
  .term-grid-ai {
    grid-template-columns: 1fr;
  }

  .start-hero-shell {
    padding: 1.35rem;
  }

  .start-hero-visual {
    min-height: 18rem;
  }

  .role-cluster-soft {
    grid-column: auto;
  }

  .relation-flow {
    flex-direction: column;
    align-items: stretch;
  }

  .flow-arrow {
    align-self: center;
    transform: rotate(90deg);
  }
}

@media (max-width: 640px) {
  .start-hero {
    padding-top: 1.7rem;
  }

  .start-hero-copy h1 {
    font-size: clamp(2.18rem, 10vw, 3.1rem);
    max-width: none;
  }

  .start-hero-text {
    font-size: 0.98rem;
    line-height: 1.78;
  }

  .start-hero-notes {
    flex-direction: column;
  }

  .clarity-node {
    padding: 0.55rem 0.8rem;
    font-size: 0.86rem;
  }

  .term-card,
  .relation-panel,
  .compare-card,
  .next-card,
  .role-cluster,
  .reason-card {
    padding-left: 1.1rem;
    padding-right: 1.1rem;
  }

  .summary-card {
    padding: 1.5rem 1.15rem;
  }
}

/* =========================
   迈出第一步页面样式
   ========================= */

.step-hero {
  padding-top: 2.6rem;
}

.step-hero-shell,
.step-finish-shell {
  border: 1px solid var(--line);
  border-radius: 34px;
  background:
    radial-gradient(circle at 12% 12%, rgba(119, 242, 213, 0.12), transparent 24%),
    radial-gradient(circle at 86% 18%, rgba(142, 185, 255, 0.13), transparent 26%),
    linear-gradient(180deg, rgba(12, 22, 43, 0.9), rgba(8, 17, 32, 0.76));
  box-shadow: var(--shadow);
}

.step-hero-shell {
  display: grid;
  grid-template-columns: 1.02fr 0.98fr;
  gap: 2rem;
  align-items: center;
  padding: 2rem;
}

.step-hero-copy h1,
.device-card h3,
.download-card h3,
.install-card h3,
.subscription-card h3,
.node-card h3,
.step-finish-shell h2 {
  margin: 0;
  font-family: var(--font-ui);
}

.step-hero-copy h1 {
  font-size: clamp(2.58rem, 4.7vw, 4.08rem);
  line-height: 1.08;
  letter-spacing: -0.045em;
  max-width: 11ch;
}

.step-hero-subtitle,
.step-hero-text,
.device-card p,
.download-card p,
.reminder-box p,
.install-tip,
.why-note,
.subscription-card p,
.node-card p,
.step-finish-shell p,
.finish-list {
  margin: 0;
  color: #c4d4ea;
  line-height: 1.8;
}

.step-hero-subtitle {
  margin-top: 1.2rem;
  font-size: 1.08rem;
  color: #e8f1ff;
  max-width: 40rem;
}

.step-hero-text {
  margin-top: 1rem;
  max-width: 55ch;
}

.step-hero-actions,
.step-finish-actions,
.download-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  margin-top: 1.9rem;
}

.step-hero-visual {
  position: relative;
  min-height: 24rem;
}

.step-hero-media {
  position: relative;
  display: grid;
  place-items: center;
  min-height: 24rem;
  padding: 1rem;
  border: 1px solid rgba(145, 189, 255, 0.14);
  border-radius: 30px;
  background:
    linear-gradient(180deg, rgba(9, 18, 34, 0.34), rgba(9, 18, 34, 0.74)),
    radial-gradient(circle at center, rgba(255, 255, 255, 0.03), transparent 58%);
  box-shadow:
    inset 0 0 0 1px rgba(255, 255, 255, 0.03),
    0 24px 58px rgba(3, 10, 22, 0.28);
  overflow: hidden;
}

.step-hero-media img {
  display: block;
  width: 100%;
  height: auto;
  max-height: 100%;
  object-fit: contain;
  border-radius: 24px;
}

.step-aura {
  position: absolute;
  border-radius: 50%;
  filter: blur(16px);
}

.step-aura-a {
  top: 8%;
  left: 4%;
  width: 12rem;
  height: 12rem;
  background: radial-gradient(circle, rgba(119, 242, 213, 0.18), transparent 68%);
}

.step-aura-b {
  right: 0;
  bottom: 7%;
  width: 10rem;
  height: 10rem;
  background: radial-gradient(circle, rgba(255, 201, 120, 0.14), transparent 68%);
}

.step-console {
  position: absolute;
  inset: 0;
  border-radius: 30px;
  border: 1px solid rgba(145, 189, 255, 0.14);
  background:
    linear-gradient(180deg, rgba(9, 18, 34, 0.18), rgba(9, 18, 34, 0.78)),
    radial-gradient(circle at center, rgba(255, 255, 255, 0.03), transparent 56%);
  overflow: hidden;
}

.step-console-card {
  position: absolute;
  display: grid;
  gap: 0.35rem;
  padding: 1rem 1.1rem;
  border-radius: 24px;
  border: 1px solid rgba(255, 255, 255, 0.1);
  background: rgba(255, 255, 255, 0.06);
  backdrop-filter: blur(14px);
}

.step-console-card small {
  color: var(--accent);
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.step-console-card strong {
  font-family: var(--font-ui);
  font-size: 1.15rem;
}

.step-console-card span {
  color: var(--muted);
  line-height: 1.65;
}

.step-console-main {
  top: 12%;
  left: 8%;
  right: 24%;
}

.step-console-side {
  right: 8%;
  bottom: 12%;
  left: 34%;
}

.step-console-track {
  position: absolute;
  height: 1px;
  background: linear-gradient(90deg, rgba(119, 242, 213, 0.12), rgba(119, 242, 213, 0.56), rgba(142, 185, 255, 0.16));
}

.track-one {
  top: 34%;
  left: 18%;
  right: 12%;
}

.track-two {
  bottom: 30%;
  left: 14%;
  right: 26%;
}

.step-console-chip {
  position: absolute;
  padding: 0.68rem 0.95rem;
  border-radius: 999px;
  border: 1px solid rgba(255, 255, 255, 0.1);
  background: rgba(255, 255, 255, 0.05);
  color: #eef4ff;
  font-weight: 600;
}

.chip-phone {
  top: 19%;
  right: 10%;
}

.chip-pc {
  top: 44%;
  left: 11%;
}

.chip-download {
  top: 44%;
  right: 26%;
}

.chip-install {
  bottom: 18%;
  left: 16%;
}

.chip-import {
  bottom: 18%;
  right: 12%;
}

.device-grid,
.download-grid,
.install-grid,
.subscription-grid,
.node-grid {
  display: grid;
  gap: 1.15rem;
}

.device-grid,
.download-grid,
.install-grid,
.subscription-grid {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.node-grid {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.device-card,
.download-card,
.install-card,
.subscription-card,
.node-card,
.why-shell,
.step-finish-shell {
  border: 1px solid var(--line);
  border-radius: 28px;
  background: linear-gradient(180deg, rgba(13, 24, 46, 0.88), rgba(8, 17, 32, 0.68));
  box-shadow: var(--shadow);
}

.device-card,
.download-card,
.install-card,
.subscription-card,
.node-card,
.why-shell {
  padding: 1.45rem;
}

.device-card {
  background:
    radial-gradient(circle at top left, rgba(119, 242, 213, 0.08), transparent 30%),
    linear-gradient(180deg, rgba(13, 24, 46, 0.9), rgba(8, 17, 32, 0.72));
}

.download-card {
  background:
    radial-gradient(circle at top left, rgba(142, 185, 255, 0.1), transparent 30%),
    linear-gradient(180deg, rgba(13, 24, 46, 0.9), rgba(8, 17, 32, 0.72));
}

.install-card,
.subscription-card-main,
.node-card {
  background:
    radial-gradient(circle at top left, rgba(255, 201, 120, 0.08), transparent 28%),
    linear-gradient(180deg, rgba(13, 24, 46, 0.9), rgba(8, 17, 32, 0.72));
}

.device-kicker,
.download-kicker,
.install-kicker,
.subscription-kicker,
.finish-title {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 2rem;
  padding: 0.35rem 0.78rem;
  border-radius: 999px;
  background: rgba(119, 242, 213, 0.12);
  color: var(--accent);
  font-size: 0.82rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.device-head h3,
.download-head h3,
.install-head h3,
.subscription-head h3,
.node-card h3 {
  margin-top: 0.95rem;
  font-size: 1.42rem;
  line-height: 1.3;
}

.device-tag,
.download-name,
.action-placeholder {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 2.5rem;
  padding: 0.62rem 0.92rem;
  border-radius: 999px;
  border: 1px solid rgba(255, 255, 255, 0.08);
  background: rgba(255, 255, 255, 0.05);
  color: #eef4ff;
  font-weight: 700;
}

.device-tag,
.download-name,
.device-tip,
.device-extra,
.reminder-box,
.install-tip,
.why-note,
.subscription-tip,
.download-extra,
.next-hint-card {
  margin-top: 1rem;
}

.device-tip,
.reminder-box,
.install-tip,
.subscription-tip,
.why-note,
.next-hint-card {
  padding: 0.95rem 1rem;
  border-radius: 20px;
  border: 1px solid rgba(255, 255, 255, 0.08);
  background: rgba(255, 255, 255, 0.04);
}

.device-extra,
.download-extra {
  color: #d7e4f6;
}

.action-placeholder-soft {
  border-style: dashed;
  color: #d3e0f3;
}

.reminder-box h4,
.subscription-meta small {
  margin: 0 0 0.45rem;
  color: var(--accent);
  font-size: 0.9rem;
  letter-spacing: 0.04em;
}

.step-list {
  margin: 1rem 0 0;
  padding-left: 1.2rem;
  color: #ebf2ff;
  line-height: 1.82;
}

.step-list li + li {
  margin-top: 0.45rem;
}

.why-shell {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.subscription-grid {
  align-items: start;
}

.subscription-meta {
  display: grid;
  gap: 0.95rem;
  margin-top: 1rem;
}

.subscription-meta strong {
  color: #eef4ff;
  font-weight: 700;
  line-height: 1.64;
}

.step-finish-shell {
  padding: 1.85rem;
}

.step-finish-shell h2 {
  font-size: clamp(2rem, 3.8vw, 3rem);
  line-height: 1.1;
  letter-spacing: -0.03em;
}

.step-finish-shell p {
  margin-top: 1rem;
  max-width: 54ch;
}

.finish-checklist {
  margin-top: 1.4rem;
  padding: 1.2rem;
  border-radius: 24px;
  border: 1px solid rgba(145, 189, 255, 0.12);
  background: rgba(11, 22, 42, 0.44);
}

.finish-title {
  margin-bottom: 0.85rem;
}

.finish-list {
  margin: 0;
  padding-left: 1.2rem;
}

.finish-list li + li {
  margin-top: 0.45rem;
}

.next-hint-card h3 {
  margin: 0 0 0.5rem;
  font-family: var(--font-ui);
  font-size: 1.2rem;
}

.next-hint-card p {
  max-width: 46rem;
}

.finish-soft-note {
  margin: 1rem 0 0;
  color: var(--muted);
  line-height: 1.75;
}

.section-bridge {
  margin-top: 0.85rem;
  max-width: 48rem;
  color: #d8e5f7;
}

.entry-grid {
  display: grid;
  grid-template-columns: 1.18fr 0.82fr;
  gap: 1.15rem;
}

.entry-card,
.entry-tip-card {
  border: 1px solid var(--line);
  border-radius: 28px;
  box-shadow: var(--shadow);
}

.entry-card {
  padding: 1.45rem;
  background: linear-gradient(180deg, rgba(13, 24, 46, 0.9), rgba(8, 17, 32, 0.7));
}

.entry-card-main {
  background:
    radial-gradient(circle at top left, rgba(119, 242, 213, 0.1), transparent 32%),
    linear-gradient(180deg, rgba(13, 24, 46, 0.92), rgba(8, 17, 32, 0.72));
  border-color: rgba(119, 242, 213, 0.2);
  box-shadow:
    0 26px 60px rgba(3, 10, 22, 0.34),
    0 0 0 1px rgba(119, 242, 213, 0.06);
}

.entry-card-backup {
  background:
    radial-gradient(circle at top left, rgba(142, 185, 255, 0.05), transparent 28%),
    linear-gradient(180deg, rgba(11, 21, 40, 0.76), rgba(8, 17, 32, 0.58));
  border-color: rgba(145, 189, 255, 0.08);
  box-shadow: 0 18px 42px rgba(3, 10, 22, 0.22);
  opacity: 0.92;
}

.entry-head h3,
.entry-tip-card h3 {
  margin: 0;
  font-family: var(--font-ui);
}

.entry-kicker {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 2rem;
  padding: 0.35rem 0.78rem;
  border-radius: 999px;
  background: rgba(119, 242, 213, 0.12);
  color: var(--accent);
  font-size: 0.82rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.entry-head h3 {
  margin-top: 0.95rem;
  font-size: 1.52rem;
  line-height: 1.28;
}

.entry-lead,
.entry-card p,
.entry-tip-card p {
  margin: 0;
  color: #c6d7ee;
  line-height: 1.78;
}

.entry-lead {
  margin-top: 0.8rem;
  color: #eaf2ff;
}

.entry-card p + p {
  margin-top: 0.8rem;
}

.entry-flow {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
  align-items: center;
  margin-top: 1rem;
}

.entry-flow span {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 2.45rem;
  padding: 0.62rem 0.92rem;
  border-radius: 999px;
  border: 1px solid rgba(255, 255, 255, 0.08);
  background: rgba(255, 255, 255, 0.05);
  color: #eef4ff;
  font-weight: 700;
}

.entry-flow b {
  color: var(--accent);
  font-size: 1rem;
}

.entry-flow-soft span {
  border-style: dashed;
  color: #d7e4f7;
}

.entry-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  margin-top: 1.2rem;
}

.entry-card-backup .entry-kicker {
  background: rgba(142, 185, 255, 0.08);
  color: #cfe0ff;
}

.entry-card-backup .button.secondary {
  border-color: rgba(145, 189, 255, 0.14);
  background: rgba(255, 255, 255, 0.03);
  color: #dce8ff;
}

.entry-card-backup .button.ghost {
  color: #b8c8df;
}

.entry-tip-card {
  margin-top: 1.15rem;
  padding: 1.2rem 1.35rem;
  background:
    radial-gradient(circle at top right, rgba(255, 201, 120, 0.08), transparent 28%),
    linear-gradient(180deg, rgba(13, 24, 46, 0.84), rgba(8, 17, 32, 0.62));
}

.entry-tip-card h3 {
  font-size: 1.28rem;
  margin-bottom: 0.65rem;
}

.guide-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1.15rem;
}

.guide-grid .guide-card {
  display: flex;
  flex-direction: column;
  gap: 1rem;
  padding: 1.15rem;
  border: 1px solid rgba(145, 189, 255, 0.14);
  border-radius: 28px;
  background:
    radial-gradient(circle at top left, rgba(142, 185, 255, 0.08), transparent 30%),
    linear-gradient(180deg, rgba(12, 23, 44, 0.9), rgba(8, 17, 33, 0.74));
  box-shadow: var(--shadow);
}

.guide-card-clickable {
  transition:
    transform 180ms ease,
    box-shadow 180ms ease,
    border-color 180ms ease;
}

.guide-card-link {
  display: flex;
  flex-direction: column;
  gap: 1rem;
  color: inherit;
  text-decoration: none;
  cursor: pointer;
}

.guide-card-clickable:hover,
.guide-card-clickable:focus-within {
  transform: translateY(-4px);
  border-color: rgba(119, 242, 213, 0.22);
  box-shadow:
    0 28px 64px rgba(3, 10, 22, 0.3),
    0 0 0 1px rgba(119, 242, 213, 0.06);
}

.guide-card-clickable:hover .guide-shot,
.guide-card-clickable:focus-within .guide-shot {
  border-color: rgba(119, 242, 213, 0.14);
}

.guide-grid .guide-card-wide {
  grid-column: span 3;
}

.guide-shot,
.guide-shot-stack {
  display: grid;
  gap: 0.85rem;
}

.guide-shot {
  padding: 0.45rem;
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: 22px;
  background: rgba(7, 17, 31, 0.72);
  overflow: hidden;
}

.guide-shot img {
  display: block;
  width: 100%;
  height: auto;
  border-radius: 18px;
  object-fit: cover;
}

.guide-shot-narrow img {
  max-height: 31rem;
  object-fit: contain;
  margin: 0 auto;
}

.guide-shot-docs {
  align-self: center;
  padding: 0.35rem;
}

.guide-shot-docs img {
  max-height: 22rem;
  object-fit: contain;
  margin: 0 auto;
}

.guide-copy {
  display: grid;
  gap: 0.7rem;
}

.guide-step {
  margin: 0;
  color: var(--accent);
  font-size: 0.82rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.guide-copy h3 {
  margin: 0;
  font-family: var(--font-ui);
  font-size: 1.34rem;
  line-height: 1.32;
}

.guide-copy p:last-child {
  margin: 0;
  color: #c7d7ee;
  line-height: 1.78;
}

.guide-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.8rem;
  margin-top: 0.2rem;
}

.guide-shot-duo {
  display: grid;
  grid-template-columns: 0.47fr 0.53fr;
  gap: 1rem;
  align-items: start;
}

#tool-backup .section-heading {
  max-width: 44rem;
}

#tool-backup .device-card {
  padding: 1.2rem;
  border-color: rgba(145, 189, 255, 0.08);
  background:
    radial-gradient(circle at top left, rgba(119, 242, 213, 0.04), transparent 24%),
    linear-gradient(180deg, rgba(11, 21, 40, 0.74), rgba(8, 17, 32, 0.58));
  box-shadow: 0 16px 34px rgba(3, 10, 22, 0.2);
}

#tool-backup .device-kicker {
  opacity: 0.84;
}

#tool-backup .device-card h3 {
  font-size: 1.2rem;
}

#tool-backup .device-card p,
#tool-backup .device-visual-note {
  color: #c0d0e3;
}

.device-visual,
.download-visual,
.service-step-visual,
.import-visual,
.node-preview-visual {
  margin-top: 1rem;
}

.device-visual,
.download-visual,
.service-step-visual,
.import-visual,
.node-preview-shell {
  border: 1px solid rgba(145, 189, 255, 0.12);
  border-radius: 22px;
  background: rgba(9, 19, 37, 0.55);
}

.device-visual {
  padding: 1rem;
}

.device-visual-note,
.download-fit,
.step-subheading p,
.service-step-card p,
.import-card p,
.import-tip,
.node-preview-copy p {
  margin: 0;
  color: #c7d7ee;
  line-height: 1.76;
}

.device-visual-note {
  margin-top: 0.85rem;
  font-size: 0.94rem;
}

.device-phone-frame {
  width: 11rem;
  margin: 0 auto;
  padding: 0.65rem;
  border-radius: 26px;
  border: 1px solid rgba(255, 255, 255, 0.08);
  background: linear-gradient(180deg, rgba(16, 28, 54, 0.95), rgba(9, 18, 34, 0.92));
  box-shadow: inset 0 0 0 1px rgba(255, 255, 255, 0.03);
}

.device-phone-screen {
  display: grid;
  justify-items: center;
  gap: 0.9rem;
  padding: 1rem 0.85rem;
  border-radius: 20px;
  background:
    radial-gradient(circle at top, rgba(119, 242, 213, 0.12), transparent 32%),
    linear-gradient(180deg, rgba(10, 21, 41, 0.92), rgba(7, 16, 31, 0.96));
}

.app-icon {
  display: grid;
  place-items: center;
  width: 3.3rem;
  height: 3.3rem;
  border-radius: 22px;
  color: #04111d;
  font-family: var(--font-ui);
  font-size: 1.3rem;
  font-weight: 800;
}

.app-icon-stash {
  background: linear-gradient(135deg, #79f2d8 0%, #b1fbef 100%);
  box-shadow: 0 12px 26px rgba(119, 242, 213, 0.18);
}

.app-icon-desktop {
  background: linear-gradient(135deg, #8eb9ff 0%, #c1d8ff 100%);
  box-shadow: 0 12px 26px rgba(142, 185, 255, 0.18);
}

.app-lines,
.desktop-panels,
.download-preview,
.phone-import-list,
.desktop-import-body,
.service-list,
.service-action-board,
.node-panel {
  display: grid;
  gap: 0.45rem;
}

.app-lines span,
.desktop-panels span,
.download-preview span,
.phone-import-list span,
.desktop-import-body span,
.service-list span,
.service-action-board span,
.node-row {
  display: block;
  min-height: 2rem;
  padding: 0.45rem 0.7rem;
  border-radius: 14px;
  background: rgba(255, 255, 255, 0.05);
  color: #eaf2ff;
}

.device-desktop-frame {
  max-width: 15rem;
  margin: 0 auto;
  border-radius: 22px;
  border: 1px solid rgba(255, 255, 255, 0.08);
  background: linear-gradient(180deg, rgba(14, 25, 48, 0.95), rgba(8, 17, 32, 0.94));
  overflow: hidden;
}

.device-desktop-bar,
.service-window-bar,
.desktop-import-bar,
.phone-import-top {
  height: 1.1rem;
  background: linear-gradient(90deg, rgba(119, 242, 213, 0.2), rgba(142, 185, 255, 0.12));
}

.device-desktop-body {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 0.9rem;
  align-items: center;
  padding: 1rem;
}

.download-visual {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 1rem;
  align-items: center;
  padding: 1rem;
}

.download-fit {
  margin-top: 0.85rem;
  color: #eaf2ff;
}

.download-preview {
  min-height: 5.2rem;
}

.download-preview span:nth-child(1) {
  width: 76%;
}

.download-preview span:nth-child(2) {
  width: 92%;
}

.download-preview span:nth-child(3) {
  width: 60%;
}

.step-subheading {
  margin-top: 2rem;
  margin-bottom: 1.5rem;
}

.service-step-grid,
.import-grid {
  display: grid;
  gap: 1.15rem;
}

.service-step-grid {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.import-grid {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.service-step-card,
.import-card {
  border: 1px solid var(--line);
  border-radius: 26px;
  background: linear-gradient(180deg, rgba(13, 24, 46, 0.86), rgba(8, 17, 32, 0.66));
  box-shadow: var(--shadow);
  padding: 1.35rem;
}

.service-step-card h3,
.import-card h3 {
  margin: 1rem 0 0.7rem;
  font-family: var(--font-ui);
  font-size: 1.32rem;
  line-height: 1.32;
}

.service-step-visual,
.import-visual {
  padding: 0.95rem;
}

.service-window,
.phone-import-ui,
.desktop-import-ui {
  border-radius: 18px;
  border: 1px solid rgba(255, 255, 255, 0.08);
  background: linear-gradient(180deg, rgba(13, 24, 46, 0.92), rgba(7, 16, 31, 0.95));
  overflow: hidden;
}

.service-list,
.service-action-board,
.phone-import-list,
.desktop-import-body {
  padding: 0.9rem;
}

.service-list .is-focus,
.phone-import-list .is-focus,
.desktop-import-body .is-focus,
.node-row.is-active {
  border: 1px solid rgba(119, 242, 213, 0.3);
  background: rgba(119, 242, 213, 0.12);
}

.service-action-board .is-accent {
  border: 1px solid rgba(255, 201, 120, 0.28);
  background: rgba(255, 201, 120, 0.12);
}

.return-flow {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  gap: 0.7rem;
  min-height: 8.6rem;
}

.return-flow span {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 2.6rem;
  padding: 0.62rem 0.95rem;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.05);
  color: #eef4ff;
  font-weight: 700;
}

.return-flow b {
  color: var(--accent);
  font-size: 1.1rem;
}

.import-tip {
  margin-top: 1rem;
  padding: 0.95rem 1rem;
  border-radius: 18px;
  border: 1px solid rgba(255, 255, 255, 0.08);
  background: rgba(255, 255, 255, 0.04);
}

.node-preview-shell {
  display: grid;
  grid-template-columns: 0.95fr 1.05fr;
  gap: 1rem;
  align-items: center;
  padding: 1rem;
  margin-bottom: 1.15rem;
}

.node-panel {
  padding: 0.95rem;
  border-radius: 18px;
  background: linear-gradient(180deg, rgba(13, 24, 46, 0.92), rgba(7, 16, 31, 0.95));
}

.node-preview-copy p {
  max-width: 44ch;
}

@media (max-width: 1080px) {
  .entry-grid,
  .step-hero-shell,
  .node-grid {
    grid-template-columns: 1fr 1fr;
  }

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

  .guide-grid .guide-card-wide {
    grid-column: span 2;
  }

  .service-step-grid {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 860px) {
  .entry-grid,
  .guide-grid,
  .step-hero-shell,
  .device-grid,
  .download-grid,
  .install-grid,
  .subscription-grid,
  .node-grid,
  .service-step-grid,
  .import-grid,
  .node-preview-shell {
    grid-template-columns: 1fr;
  }

  .guide-grid .guide-card-wide,
  .guide-shot-duo {
    grid-column: auto;
    grid-template-columns: 1fr;
  }

  .step-hero-shell,
  .step-finish-shell {
    padding: 1.35rem;
  }

  .step-hero-visual {
    min-height: auto;
  }

  .step-hero-media {
    min-height: 18rem;
  }

  .why-shell {
    align-items: stretch;
  }

  .node-preview-copy p {
    max-width: none;
  }
}

@media (max-width: 640px) {
  .step-hero {
    padding-top: 1.7rem;
  }

  .step-hero-copy h1 {
    font-size: clamp(2.18rem, 10vw, 3.1rem);
    max-width: none;
  }

  .step-hero-subtitle,
  .step-hero-text,
  .device-card p,
  .download-card p,
  .reminder-box p,
  .install-tip,
  .why-note,
  .subscription-card p,
  .node-card p,
  .step-finish-shell p,
  .finish-list {
    font-size: 0.98rem;
    line-height: 1.78;
  }

  .entry-actions,
  .step-hero-actions,
  .download-actions,
  .step-finish-actions {
    flex-direction: column;
    align-items: stretch;
  }

  .step-hero-visual {
    min-height: auto;
  }

  .step-hero-media {
    min-height: 13.5rem;
    padding: 0.7rem;
    border-radius: 22px;
  }

  .step-hero-media img {
    border-radius: 18px;
  }

  .device-card,
  .guide-grid .guide-card,
  .download-card,
  .install-card,
  .subscription-card,
  .node-card,
  .why-shell,
  .service-step-card,
  .import-card {
    padding-left: 1.1rem;
    padding-right: 1.1rem;
  }

  .download-visual,
  .node-preview-shell {
    grid-template-columns: 1fr;
  }

  .download-visual {
    justify-items: start;
  }

  .return-flow {
    flex-direction: column;
  }

  .entry-card-main,
  .entry-card-backup,
  .entry-tip-card,
  #tool-backup .device-card,
  .finish-checklist,
  .next-hint-card {
    border-radius: 24px;
  }

  .entry-actions .button {
    width: 100%;
    justify-content: center;
  }

  .entry-card-backup .button.secondary,
  .entry-card-backup .button.ghost {
    min-height: 3rem;
  }

  .guide-shot {
    padding: 0.35rem;
    border-radius: 18px;
  }

  .guide-shot img {
    border-radius: 14px;
  }

  .guide-shot-docs img {
    max-height: 14rem;
  }

  .guide-card-link {
    gap: 0.9rem;
  }

  .guide-actions .button {
    width: 100%;
    justify-content: center;
  }

  #tool-backup .device-visual {
    padding: 0.85rem;
  }

  .finish-list {
    line-height: 1.82;
  }

  .step-finish-actions {
    margin-top: 1rem;
  }

  .finish-soft-note {
    margin-top: 0.85rem;
  }
}

/* =========================
   AI新世界页面样式
   ========================= */

.ai-hero {
  padding-top: 2.6rem;
}

.ai-hero-shell,
.ai-finish-shell {
  border: 1px solid var(--line);
  border-radius: 34px;
  background:
    radial-gradient(circle at 14% 14%, rgba(119, 242, 213, 0.09), transparent 24%),
    radial-gradient(circle at 88% 18%, rgba(142, 185, 255, 0.13), transparent 28%),
    linear-gradient(180deg, rgba(10, 20, 40, 0.92), rgba(7, 15, 30, 0.8));
  box-shadow: var(--shadow);
}

.ai-hero-shell {
  display: grid;
  grid-template-columns: 0.96fr 1.04fr;
  gap: 2rem;
  align-items: center;
  padding: 2rem;
}

.ai-hero-copy h1,
.ai-context-card h3,
.ai-core-card h3,
.ai-entry-card h3,
.ai-horizon-card h3,
.ai-finish-shell h2 {
  margin: 0;
  font-family: var(--font-ui);
}

.ai-hero-copy h1 {
  font-size: clamp(2.5rem, 4.8vw, 4.12rem);
  line-height: 1.08;
  letter-spacing: -0.04em;
  max-width: 12ch;
}

.ai-hero-subtitle,
.ai-hero-text,
.ai-context-card p,
.ai-core-card p,
.ai-entry-card p,
.ai-horizon-card p,
.ai-finish-shell p {
  margin: 0;
  color: #c7d6ea;
  line-height: 1.82;
}

.ai-hero-subtitle {
  margin-top: 1.3rem;
  color: #ebf3ff;
  font-size: 1.08rem;
  max-width: 46rem;
}

.ai-hero-text {
  margin-top: 1.15rem;
  max-width: 58ch;
}

.ai-hero-actions,
.ai-finish-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  margin-top: 1.8rem;
}

.ai-hero-visual {
  position: relative;
}

.ai-hero-media {
  position: relative;
  padding: 0.85rem;
  border: 1px solid rgba(145, 189, 255, 0.11);
  border-radius: 30px;
  background:
    linear-gradient(180deg, rgba(9, 18, 34, 0.24), rgba(9, 18, 34, 0.72)),
    radial-gradient(circle at center, rgba(255, 255, 255, 0.03), transparent 58%);
  box-shadow:
    inset 0 0 0 1px rgba(255, 255, 255, 0.03),
    0 18px 42px rgba(3, 10, 22, 0.22);
  overflow: hidden;
}

.ai-hero-media img {
  display: block;
  width: 100%;
  height: auto;
  border-radius: 24px;
  object-fit: contain;
}

.ai-context-shell {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1.15rem;
}

.ai-context-card,
.ai-core-card,
.ai-entry-card,
.ai-horizon-card {
  border: 1px solid rgba(145, 189, 255, 0.12);
  border-radius: 28px;
  background:
    radial-gradient(circle at top left, rgba(142, 185, 255, 0.08), transparent 30%),
    linear-gradient(180deg, rgba(12, 23, 44, 0.88), rgba(8, 17, 33, 0.72));
  box-shadow: var(--shadow);
}

.ai-context-card {
  padding: 1.45rem;
}

.ai-context-kicker,
.ai-core-step,
.ai-entry-tag {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 2rem;
  padding: 0.35rem 0.78rem;
  border-radius: 999px;
  background: rgba(119, 242, 213, 0.1);
  color: var(--accent);
  font-size: 0.82rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.ai-context-card h3,
.ai-core-card h3,
.ai-entry-card h3,
.ai-horizon-card h3 {
  margin-top: 0.95rem;
  font-size: 1.4rem;
  line-height: 1.3;
}

.ai-core-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1.15rem;
}

.ai-core-card {
  padding: 1.4rem;
}

.ai-entry-grid {
  display: grid;
  grid-template-columns: 1.22fr 0.78fr;
  gap: 1.15rem;
}

.ai-entry-group {
  display: grid;
  gap: 1rem;
  padding: 1.15rem;
  border: 1px solid rgba(145, 189, 255, 0.12);
  border-radius: 30px;
  box-shadow: var(--shadow);
}

.ai-entry-group-platform {
  grid-template-columns: repeat(3, minmax(0, 1fr));
  background:
    radial-gradient(circle at top left, rgba(119, 242, 213, 0.07), transparent 24%),
    linear-gradient(180deg, rgba(11, 22, 42, 0.88), rgba(8, 17, 32, 0.72));
}

.ai-entry-group-deep {
  align-content: start;
  background:
    radial-gradient(circle at top left, rgba(142, 185, 255, 0.05), transparent 24%),
    linear-gradient(180deg, rgba(10, 20, 38, 0.78), rgba(7, 15, 29, 0.64));
  border-color: rgba(145, 189, 255, 0.08);
}

.ai-entry-group-label {
  grid-column: 1 / -1;
  margin: 0;
  color: #d6e3f6;
  font-size: 0.92rem;
}

.ai-entry-card {
  padding: 1.45rem;
  border-radius: 24px;
}

.ai-entry-card-platform {
  background:
    radial-gradient(circle at top left, rgba(119, 242, 213, 0.09), transparent 24%),
    linear-gradient(180deg, rgba(13, 24, 46, 0.92), rgba(8, 17, 33, 0.76));
  border: 1px solid rgba(119, 242, 213, 0.08);
  box-shadow:
    inset 0 0 0 1px rgba(255, 255, 255, 0.02),
    0 18px 34px rgba(3, 10, 22, 0.18);
}

.ai-entry-card-deep {
  background:
    radial-gradient(circle at top left, rgba(142, 185, 255, 0.05), transparent 24%),
    linear-gradient(180deg, rgba(10, 20, 39, 0.82), rgba(7, 15, 29, 0.66));
  border: 1px solid rgba(145, 189, 255, 0.08);
  box-shadow:
    inset 0 0 0 1px rgba(255, 255, 255, 0.02),
    0 14px 28px rgba(3, 10, 22, 0.14);
}

.ai-horizon {
  overflow: hidden;
}

.ai-horizon::before {
  content: "";
  position: absolute;
  inset: 12% auto auto 8%;
  width: 18rem;
  height: 18rem;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(119, 242, 213, 0.08), transparent 68%);
  filter: blur(12px);
  pointer-events: none;
}

.ai-horizon-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 1rem;
}

.ai-horizon-card {
  padding: 1.25rem;
  background:
    radial-gradient(circle at top right, rgba(255, 201, 120, 0.05), transparent 18%),
    linear-gradient(180deg, rgba(10, 21, 40, 0.7), rgba(8, 16, 31, 0.54));
  border-color: rgba(145, 189, 255, 0.08);
  box-shadow: 0 14px 28px rgba(3, 10, 22, 0.12);
}

.ai-horizon-card h3 {
  font-size: 1.18rem;
}

.ai-horizon-card p {
  color: #b7c8dd;
}

.ai-finish-shell {
  padding: 1.7rem;
}

.ai-finish-copy p {
  margin-top: 1rem;
  max-width: 50rem;
}

.ai-finish-note {
  margin-top: 1rem;
  color: var(--muted);
}

@media (max-width: 1080px) {
  .ai-hero-shell,
  .ai-context-shell,
  .ai-horizon-grid {
    grid-template-columns: 1fr 1fr;
  }

  .ai-entry-grid,
  .ai-entry-group-platform {
    grid-template-columns: 1fr 1fr;
  }

  .ai-core-grid {
    grid-template-columns: 1fr 1fr 1fr;
  }
}

@media (max-width: 860px) {
  .ai-hero-shell,
  .ai-context-shell,
  .ai-core-grid,
  .ai-entry-grid,
  .ai-entry-group-platform,
  .ai-horizon-grid {
    grid-template-columns: 1fr;
  }

  .ai-hero-shell,
  .ai-finish-shell {
    padding: 1.35rem;
  }

  .ai-hero-visual {
    order: -1;
  }

  .ai-entry-group {
    padding: 1rem;
  }
}

@media (max-width: 640px) {
  .ai-hero {
    padding-top: 1.7rem;
  }

  .ai-hero-copy h1 {
    font-size: clamp(2.16rem, 10vw, 3.12rem);
    max-width: none;
  }

  .ai-hero-subtitle,
  .ai-hero-text,
  .ai-context-card p,
  .ai-core-card p,
  .ai-entry-card p,
  .ai-horizon-card p,
  .ai-finish-shell p {
    font-size: 0.98rem;
    line-height: 1.78;
  }

  .ai-hero-actions,
  .ai-finish-actions {
    flex-direction: column;
    align-items: stretch;
  }

  .ai-hero-media {
    padding: 0.55rem;
    border-radius: 22px;
  }

  .ai-hero-media img {
    border-radius: 18px;
  }

  .ai-context-card,
  .ai-core-card,
  .ai-entry-card,
  .ai-horizon-card {
    padding-left: 1.1rem;
    padding-right: 1.1rem;
  }
}

/* =========================
   FAQ / 常见问题页样式
   ========================= */

.faq-hero {
  padding-top: 2.4rem;
}

.faq-hero-shell {
  display: grid;
  grid-template-columns: 1.02fr 0.98fr;
  gap: 2.4rem;
  align-items: center;
}

.faq-hero-copy h1 {
  margin: 0;
  max-width: 12.5ch;
  font-family: var(--font-ui);
  font-size: clamp(2.5rem, 4.6vw, 4.12rem);
  line-height: 1.12;
  letter-spacing: -0.045em;
}

.faq-hero-text {
  margin: 1.7rem 0 0;
  max-width: 57ch;
  color: #c4d4ea;
  font-size: 1.02rem;
  line-height: 1.9;
}

.faq-hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  margin-top: 2rem;
}

.faq-hero-visual {
  position: relative;
  min-height: 480px;
  display: grid;
  place-items: center;
}

.faq-beacon {
  position: absolute;
  border-radius: 50%;
  filter: blur(10px);
}

.faq-beacon-a {
  width: 18rem;
  height: 18rem;
  background: radial-gradient(circle, rgba(119, 242, 213, 0.2), transparent 68%);
  top: 10%;
  left: 6%;
}

.faq-beacon-b {
  width: 22rem;
  height: 22rem;
  background: radial-gradient(circle, rgba(255, 201, 120, 0.18), transparent 70%);
  right: 0;
  bottom: 4%;
}

.faq-lantern {
  position: relative;
  width: min(100%, 520px);
  min-height: 430px;
  border-radius: 40px;
  border: 1px solid rgba(145, 189, 255, 0.18);
  background:
    radial-gradient(circle at 50% 32%, rgba(119, 242, 213, 0.12), transparent 30%),
    linear-gradient(180deg, rgba(11, 25, 47, 0.96), rgba(7, 16, 31, 0.88));
  box-shadow: var(--shadow);
  overflow: hidden;
}

.faq-lantern::before {
  content: "";
  position: absolute;
  inset: 1.1rem;
  border-radius: 32px;
  border: 1px solid rgba(255, 255, 255, 0.06);
  pointer-events: none;
}

.faq-lantern-core,
.faq-lantern-ring {
  position: absolute;
  left: 50%;
  top: 40%;
  transform: translate(-50%, -50%);
  border-radius: 50%;
}

.faq-lantern-core {
  width: 6.8rem;
  height: 6.8rem;
  background:
    radial-gradient(circle at 35% 35%, rgba(255, 255, 255, 0.95), rgba(255, 201, 120, 0.82) 45%, rgba(119, 242, 213, 0.22) 78%, transparent 100%);
  box-shadow: 0 0 60px rgba(119, 242, 213, 0.25);
}

.faq-lantern-ring {
  width: 15rem;
  height: 15rem;
  border: 1px solid rgba(145, 189, 255, 0.16);
  box-shadow:
    0 0 0 22px rgba(119, 242, 213, 0.03),
    0 0 0 54px rgba(255, 201, 120, 0.02);
}

.faq-lantern-card {
  position: absolute;
  padding: 1rem 1.1rem;
  border-radius: 22px;
  border: 1px solid rgba(145, 189, 255, 0.18);
  background: rgba(8, 19, 37, 0.82);
  box-shadow: 0 18px 42px rgba(2, 6, 18, 0.34);
  max-width: 15rem;
}

.faq-lantern-card small,
.faq-forward-kicker,
.faq-role-label {
  display: block;
  color: var(--accent);
  font-size: 0.82rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.faq-lantern-card strong {
  display: block;
  margin-top: 0.45rem;
  font-family: var(--font-ui);
  font-size: 1rem;
  line-height: 1.5;
}

.faq-lantern-card-main {
  left: 1.5rem;
  bottom: 1.7rem;
}

.faq-lantern-card-side {
  right: 1.5rem;
  top: 1.6rem;
}

.faq-soft-grid,
.faq-role-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1.2rem;
}

.faq-soft-card,
.faq-role-card {
  padding: 1.5rem;
  border-radius: 24px;
  border: 1px solid rgba(145, 189, 255, 0.14);
  background: linear-gradient(180deg, rgba(12, 25, 48, 0.85), rgba(8, 17, 33, 0.88));
  box-shadow: 0 18px 40px rgba(2, 6, 18, 0.28);
}

.faq-soft-icon {
  width: 2.6rem;
  height: 2.6rem;
  display: inline-grid;
  place-items: center;
  border-radius: 50%;
  margin-bottom: 1rem;
  font-family: var(--font-ui);
  font-weight: 700;
  color: #06111d;
  background: linear-gradient(135deg, #79f2d8, #ffc978);
}

.faq-soft-card h3,
.faq-role-card h3,
.faq-forward-card h3 {
  margin: 0;
  font-family: var(--font-ui);
  font-size: 1.28rem;
  line-height: 1.35;
}

.faq-soft-card p,
.faq-role-card p,
.faq-forward-card p {
  margin: 0.85rem 0 0;
  color: var(--muted);
  line-height: 1.8;
}

.faq-accordion {
  display: grid;
  gap: 1rem;
}

.faq-item {
  border: 1px solid rgba(145, 189, 255, 0.16);
  border-radius: 24px;
  background: linear-gradient(180deg, rgba(11, 24, 46, 0.88), rgba(7, 16, 30, 0.92));
  box-shadow: 0 18px 40px rgba(2, 6, 18, 0.24);
  overflow: hidden;
}

.faq-item summary {
  list-style: none;
  cursor: pointer;
  padding: 1.35rem 1.5rem;
  font-family: var(--font-ui);
  font-size: 1.08rem;
  font-weight: 600;
  line-height: 1.5;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.faq-item summary::-webkit-details-marker {
  display: none;
}

.faq-item summary::after {
  content: "+";
  flex: 0 0 auto;
  width: 2rem;
  height: 2rem;
  display: inline-grid;
  place-items: center;
  border-radius: 50%;
  color: var(--accent);
  background: rgba(119, 242, 213, 0.08);
  border: 1px solid rgba(119, 242, 213, 0.18);
  font-size: 1.15rem;
}

.faq-item[open] summary::after {
  content: "-";
}

.faq-answer {
  padding: 0 1.5rem 1.45rem;
  color: var(--muted);
}

.faq-answer p + p {
  margin-top: 0.8rem;
}

.faq-forward-shell {
  padding: 2rem;
  border-radius: 32px;
  border: 1px solid rgba(145, 189, 255, 0.18);
  background:
    radial-gradient(circle at top left, rgba(119, 242, 213, 0.08), transparent 30%),
    linear-gradient(180deg, rgba(12, 24, 47, 0.92), rgba(8, 16, 31, 0.94));
  box-shadow: var(--shadow);
}

.faq-forward-copy h2 {
  margin: 0;
  font-family: var(--font-ui);
  font-size: clamp(2rem, 3.8vw, 3rem);
  line-height: 1.12;
  letter-spacing: -0.035em;
  max-width: 15ch;
}

.faq-forward-copy p {
  max-width: 64ch;
  color: var(--muted);
  line-height: 1.85;
}

.faq-forward-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  margin-top: 1.8rem;
}

.faq-forward-card {
  margin-top: 1.8rem;
  padding: 1.35rem 1.4rem;
  border-radius: 24px;
  border: 1px solid rgba(255, 255, 255, 0.08);
  background: rgba(7, 17, 31, 0.62);
  max-width: 28rem;
}

@media (max-width: 1080px) {
  .faq-hero-shell,
  .faq-soft-grid,
  .faq-role-grid {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 860px) {
  .faq-hero-shell,
  .faq-soft-grid,
  .faq-role-grid {
    grid-template-columns: 1fr;
  }

  .faq-hero-visual {
    order: -1;
    min-height: 400px;
  }

  .faq-forward-shell {
    padding: 1.5rem;
  }
}

@media (max-width: 640px) {
  .faq-hero {
    padding-top: 1.7rem;
  }

  .faq-hero-copy h1,
  .faq-forward-copy h2 {
    font-size: clamp(2.12rem, 10vw, 3rem);
    max-width: none;
  }

  .faq-hero-text,
  .faq-soft-card p,
  .faq-role-card p,
  .faq-answer,
  .faq-forward-copy p,
  .faq-forward-card p {
    font-size: 0.98rem;
    line-height: 1.78;
  }

  .faq-hero-actions,
  .faq-forward-actions {
    flex-direction: column;
    align-items: stretch;
  }

  .faq-hero-visual {
    min-height: 320px;
  }

  .faq-lantern {
    min-height: 320px;
    border-radius: 26px;
  }

  .faq-lantern::before {
    inset: 0.8rem;
    border-radius: 20px;
  }

  .faq-lantern-ring {
    width: 11rem;
    height: 11rem;
  }

  .faq-lantern-core {
    width: 5rem;
    height: 5rem;
  }

  .faq-lantern-card {
    max-width: 12rem;
    padding: 0.85rem 0.9rem;
  }

  .faq-item summary,
  .faq-answer,
  .faq-soft-card,
  .faq-role-card,
  .faq-forward-shell {
    padding-left: 1.1rem;
    padding-right: 1.1rem;
  }
}


/* =========================
   导航、页脚与学习地图精修
   ========================= */

.nav {
  flex-wrap: nowrap;
}

.nav-menu {
  min-width: 0;
  flex-wrap: nowrap;
  gap: 0.55rem;
}

.nav-menu a {
  white-space: nowrap;
  word-break: keep-all;
  flex: 0 0 auto;
}

.nav-home-link {
  padding-inline: 0.9rem !important;
}

.footer-grid {
  grid-template-columns: minmax(0, 1.2fr) minmax(18rem, 0.55fr);
  gap: 3rem;
  align-items: start;
}

.footer-links {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.7rem 1rem;
  justify-items: start;
  align-content: start;
}

.footer-links a {
  padding: 0.42rem 0;
  color: rgba(198, 213, 235, 0.78);
  white-space: nowrap;
}

.route-map {
  position: relative;
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1rem 1.2rem;
}

.route-map::before {
  content: "";
  position: absolute;
  left: 1.75rem;
  top: 2rem;
  bottom: 2rem;
  width: 1px;
  background: linear-gradient(180deg, transparent, rgba(119, 242, 213, 0.5), transparent);
  opacity: 0.55;
}

.route-stop {
  position: relative;
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 1rem;
  min-height: 12rem;
  padding: 1.15rem;
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  background:
    radial-gradient(circle at 14% 14%, rgba(119, 242, 213, 0.12), transparent 28%),
    linear-gradient(180deg, rgba(15, 29, 56, 0.86), rgba(8, 18, 34, 0.72));
  box-shadow: 0 20px 60px rgba(1, 6, 18, 0.25);
  transition: transform 0.2s ease, border-color 0.2s ease;
}

.route-stop:hover,
.route-stop:focus-visible {
  transform: translateY(-3px);
  border-color: var(--line-strong);
}

.route-number {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 3.3rem;
  height: 3.3rem;
  border: 1px solid rgba(119, 242, 213, 0.26);
  border-radius: 50%;
  color: var(--accent);
  background: rgba(119, 242, 213, 0.08);
  font-size: 0.78rem;
  font-weight: 700;
  box-shadow: 0 0 24px rgba(119, 242, 213, 0.14);
}

.route-stop h3 {
  margin: 0 0 0.75rem;
  font-family: var(--font-ui);
  font-size: 1.38rem;
}

.route-stop p {
  margin: 0;
  color: var(--muted);
  line-height: 1.75;
}

.route-stop-soft {
  grid-column: span 2;
  min-height: 8rem;
}

.obsidian-demo-card {
  margin: 0;
  padding: 0.8rem;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 28px;
  background:
    radial-gradient(circle at 18% 10%, rgba(119, 242, 213, 0.1), transparent 28%),
    rgba(8, 18, 34, 0.78);
  box-shadow: var(--shadow);
}

.obsidian-demo-card img {
  width: 100%;
  max-height: 760px;
  object-fit: contain;
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: 20px;
  background: #f7f7f7;
}

.obsidian-demo-card figcaption {
  margin: 0.85rem 0.35rem 0.2rem;
  color: var(--muted);
  font-size: 0.9rem;
  line-height: 1.6;
}

@media (max-width: 1080px) {
  .route-map {
    grid-template-columns: 1fr;
  }

  .route-stop-soft {
    grid-column: auto;
  }
}

@media (max-width: 860px) {
  .nav {
    flex-wrap: wrap;
  }

  .nav-menu {
    flex-wrap: nowrap;
  }

  .nav-menu a {
    width: 100%;
    white-space: nowrap;
  }

  .footer-grid {
    grid-template-columns: 1fr;
    gap: 1.5rem;
  }
}

@media (max-width: 640px) {
  .footer-links {
    grid-template-columns: 1fr;
  }

  .route-map::before {
    left: 1.35rem;
  }

  .route-stop {
    grid-template-columns: 1fr;
    min-height: auto;
    padding: 1rem;
  }

  .route-number {
    width: auto;
    height: auto;
    padding: 0.4rem 0.7rem;
    border-radius: 999px;
    justify-content: flex-start;
  }

  .obsidian-demo-card {
    padding: 0.55rem;
    border-radius: 22px;
  }

  .obsidian-demo-card img {
    border-radius: 16px;
  }
}