/* Autobox marketing site — blueprint / drafting room tone */
:root {
  --brand: #2774e5;
  --brand-dark: #1d66d2;
  --brand-deeper: #1554ad;
  --ink: #152033;
  --ink-soft: #4a5568;
  --line: #d5e0ef;
  --paper: #f4f7fb;
  --white: #ffffff;
  --vip: #facc15;
  --radius: 6px;
  --shadow-soft: 0 12px 40px rgba(21, 84, 173, 0.08);
  --font-display: "Outfit", "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
  --font-body: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
  --shell: min(1120px, calc(100% - 2.5rem));
  --header-h: 64px;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.65;
  color: var(--ink);
  background: var(--paper);
  -webkit-font-smoothing: antialiased;
}

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

a {
  color: var(--brand-dark);
  text-decoration-thickness: 1px;
  text-underline-offset: 0.18em;
}

a:hover {
  color: var(--brand-deeper);
}

.shell {
  width: var(--shell);
  margin-inline: auto;
}

.skip-link {
  position: absolute;
  left: -999px;
  top: 0;
  background: var(--brand);
  color: #fff;
  padding: 0.5rem 1rem;
  z-index: 100;
}

.skip-link:focus {
  left: 0.5rem;
  top: 0.5rem;
}

/* Header */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  height: var(--header-h);
  background: rgba(244, 247, 251, 0.92);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid transparent;
  transition: border-color 0.25s ease, background 0.25s ease;
}

.site-header.is-scrolled {
  border-bottom-color: var(--line);
  background: rgba(255, 255, 255, 0.94);
}

.header-inner {
  height: var(--header-h);
  display: flex;
  align-items: center;
  gap: 1.5rem;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
  color: inherit;
  text-decoration: none;
  flex-shrink: 0;
}

.brand img {
  width: 28px;
  height: 28px;
  border-radius: 4px;
}

.brand-name {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.2rem;
  letter-spacing: -0.02em;
}

.nav {
  display: flex;
  gap: 1.35rem;
  margin-left: auto;
}

.nav a {
  color: var(--ink-soft);
  text-decoration: none;
  font-size: 0.95rem;
  font-weight: 500;
}

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

.header-cta {
  flex-shrink: 0;
}

.nav-toggle {
  display: none;
  width: 40px;
  height: 40px;
  margin-left: auto;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--white);
  padding: 0;
  cursor: pointer;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 5px;
}

.nav-toggle span {
  display: block;
  width: 16px;
  height: 1.5px;
  background: var(--ink);
}

.mobile-nav {
  display: none;
  flex-direction: column;
  gap: 0.75rem;
  padding: 1rem 1.25rem 1.25rem;
  background: var(--white);
  border-bottom: 1px solid var(--line);
}

.mobile-nav a {
  text-decoration: none;
  color: var(--ink);
  font-weight: 500;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 40px;
  padding: 0 1.1rem;
  border-radius: var(--radius);
  font-family: var(--font-body);
  font-weight: 600;
  font-size: 0.95rem;
  text-decoration: none;
  border: 1px solid transparent;
  transition: background 0.2s ease, border-color 0.2s ease, color 0.2s ease, transform 0.2s ease;
  cursor: pointer;
}

.btn-primary {
  background: var(--brand);
  color: #fff;
  border-color: var(--brand-dark);
}

.btn-primary:hover {
  background: var(--brand-dark);
  color: #fff;
  transform: translateY(-1px);
}

.btn-ghost {
  background: transparent;
  color: #fff;
  border-color: rgba(255, 255, 255, 0.45);
}

.btn-ghost:hover {
  background: rgba(255, 255, 255, 0.1);
  color: #fff;
  border-color: rgba(255, 255, 255, 0.75);
}

.btn-lg {
  min-height: 48px;
  padding: 0 1.4rem;
  font-size: 1rem;
}

/* Hero */
.hero {
  position: relative;
  display: flex;
  align-items: center;
  overflow: hidden;
  color: #fff;
  isolation: isolate;
  padding: 2rem 0 1.75rem;
}

.hero-visual {
  position: absolute;
  inset: 0;
  z-index: -1;
  background:
    radial-gradient(ellipse 65% 70% at 82% 48%, rgba(255, 255, 255, 0.12), transparent 52%),
    linear-gradient(145deg, #174fad 0%, #1f5fbf 42%, #2a70d4 100%);
}

.hero-grid {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.055) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.055) 1px, transparent 1px);
  background-size: 40px 40px;
  mask-image: linear-gradient(90deg, rgba(0, 0, 0, 0.28), rgba(0, 0, 0, 0.7) 55%, rgba(0, 0, 0, 0.35));
  opacity: 0.45;
}

.hero-stage {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 0.78fr) minmax(0, 1.22fr);
  gap: clamp(1.1rem, 2.5vw, 2rem);
  align-items: center;
  width: var(--shell);
}

.hero-copy {
  max-width: 22.5rem;
  display: flex;
  flex-direction: column;
  align-items: flex-start;
}

.hero-brand {
  margin: 0 0 0.55rem;
  font-family: var(--font-display);
  font-size: clamp(1.75rem, 3.2vw, 2.35rem);
  font-weight: 700;
  letter-spacing: -0.035em;
  line-height: 1.05;
  color: #fff;
}

.hero-title {
  margin: 0 0 0.45rem;
  font-family: var(--font-body);
  font-size: clamp(0.98rem, 1.6vw, 1.12rem);
  font-weight: 600;
  line-height: 1.45;
  letter-spacing: -0.01em;
  color: #fff;
  max-width: 20em;
}

.hero-lead {
  margin: 0 0 0.55rem;
  font-size: 0.88rem;
  line-height: 1.65;
  color: rgba(255, 255, 255, 0.78);
  max-width: 24em;
}

.hero-disclaimer {
  margin: 0 0 1.1rem;
  font-size: 0.82rem;
  font-weight: 600;
  line-height: 1.4;
  letter-spacing: 0.02em;
  color: #9fd0ff;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.55rem;
}

.hero-actions .btn {
  flex-direction: column;
  align-items: flex-start;
  gap: 0.08rem;
  min-width: 8.25rem;
  min-height: 2.75rem;
  padding: 0.4rem 1rem;
  line-height: 1.15;
  border-radius: 6px;
  font-size: 0.9rem;
}

.hero-actions .btn-primary {
  background: #fff;
  color: var(--brand-deeper);
  border-color: #fff;
  box-shadow: 0 6px 18px rgba(8, 35, 90, 0.18);
}

.hero-actions .btn-primary:hover {
  background: #f3f7ff;
  color: var(--brand-deeper);
  border-color: #f3f7ff;
  transform: translateY(-1px);
}

.hero-actions .btn-ghost {
  background: rgba(255, 255, 255, 0.06);
  border-color: rgba(255, 255, 255, 0.5);
}

.hero-actions .btn-ghost:hover {
  background: rgba(255, 255, 255, 0.14);
  border-color: #fff;
}

.hero-actions .btn-sub {
  font-size: 0.68rem;
  font-weight: 500;
  opacity: 0.75;
  letter-spacing: 0.02em;
}

.hero-note {
  margin: 0.65rem 0 0;
  font-size: 0.75rem;
  line-height: 1.45;
  color: rgba(255, 255, 255, 0.58);
}

.hero-note a {
  color: #fff;
  text-decoration: underline;
  text-underline-offset: 2px;
}

.hero-note a:hover {
  opacity: 0.9;
}

.hero-shot {
  min-width: 0;
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: 0.55rem;
}

.hero-buildmeta {
  margin: 0;
  width: 520px;
  max-width: 100%;
  font-size: 0.72rem;
  line-height: 1.45;
  letter-spacing: 0.01em;
  color: rgba(255, 255, 255, 0.55);
  text-align: center;
}

/* 产品预览略缩小，首屏更紧凑 */
.hero-frame {
  width: 520px;
  max-width: 100%;
  aspect-ratio: 604 / 381;
  border-radius: 10px;
  background: transparent;
  position: relative;
  box-shadow:
    0 1px 2px rgba(0, 0, 0, 0.08),
    0 4px 12px rgba(0, 0, 0, 0.12),
    0 14px 32px rgba(0, 0, 0, 0.24);
}

.hero-carousel .carousel-viewport {
  position: relative;
  width: 100%;
  height: 100%;
  border-radius: 10px;
  overflow: hidden;
  background: transparent;
}

.carousel-slide {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  border-radius: 10px;
  opacity: 0;
  transform: scale(1.018) translateY(6px);
  transition:
    opacity 0.85s cubic-bezier(0.22, 1, 0.36, 1),
    transform 0.85s cubic-bezier(0.22, 1, 0.36, 1);
  pointer-events: none;
  will-change: opacity, transform;
}

.carousel-slide.is-active {
  opacity: 1;
  transform: scale(1) translateY(0);
  z-index: 1;
}

.carousel-slide.is-leaving {
  opacity: 0;
  transform: scale(0.992) translateY(-4px);
  z-index: 0;
}

.carousel-dots {
  position: absolute;
  left: 50%;
  bottom: 0.75rem;
  transform: translateX(-50%);
  display: flex;
  gap: 0.45rem;
  z-index: 2;
  padding: 0.35rem 0.5rem;
  border-radius: 99px;
  background: rgba(15, 35, 70, 0.28);
  backdrop-filter: blur(6px);
}

.carousel-dots button {
  width: 7px;
  height: 7px;
  padding: 0;
  border: none;
  border-radius: 99px;
  background: rgba(255, 255, 255, 0.45);
  cursor: pointer;
  transition: width 0.35s ease, background 0.35s ease, opacity 0.35s ease;
  opacity: 0.85;
}

.carousel-dots button.is-active {
  width: 22px;
  background: #fff;
  opacity: 1;
}

.carousel-dots button:hover {
  background: rgba(255, 255, 255, 0.85);
}

.hero-photo {
  width: 100%;
  height: 100%;
  display: block;
  object-fit: cover;
  border-radius: 10px;
  background: transparent;
}

/* App window mockups (CAD gallery) */
.win {
  background: #f3f6fb;
  border-radius: 8px;
  overflow: hidden;
  border: 1px solid rgba(15, 40, 80, 0.18);
  box-shadow: 0 18px 50px rgba(8, 30, 70, 0.28);
  color: var(--ink);
  font-size: 12px;
}

.win-hero {
  transform: perspective(1200px) rotateY(-4deg) rotateX(2deg);
  transform-origin: center right;
}

.win-chrome {
  display: flex;
  align-items: center;
  gap: 0.65rem;
  height: 32px;
  padding: 0 0.75rem;
  background: #e8eef7;
  border-bottom: 1px solid #d5deea;
}

.win-dots {
  width: 42px;
  height: 8px;
  border-radius: 99px;
  background:
    radial-gradient(circle at 4px 4px, #ff5f57 3.2px, transparent 3.5px),
    radial-gradient(circle at 16px 4px, #febc2e 3.2px, transparent 3.5px),
    radial-gradient(circle at 28px 4px, #28c840 3.2px, transparent 3.5px);
}

.win-title {
  font-size: 11px;
  color: #5a6a80;
  font-weight: 500;
}

.win-body {
  display: grid;
  grid-template-columns: 118px 1fr;
  min-height: 320px;
}

.win-side {
  background: var(--brand);
  color: #fff;
  padding: 0.75rem 0.55rem;
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
}

.win-logo {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 13px;
  padding: 0.25rem 0.4rem 0.6rem;
}

.win-side ul {
  list-style: none;
  margin: 0;
  padding: 0;
  flex: 1;
}

.win-side li {
  padding: 0.4rem 0.5rem;
  border-radius: 4px;
  font-size: 11px;
  opacity: 0.85;
}

.win-side li.on {
  background: rgba(255, 255, 255, 0.18);
  opacity: 1;
  font-weight: 600;
}

.win-side-cta {
  margin-top: auto;
  text-align: center;
  background: #facc15;
  color: #1a2540;
  font-weight: 700;
  font-size: 11px;
  padding: 0.45rem 0.35rem;
  border-radius: 4px;
}

.win-main {
  padding: 0.9rem 1rem 1rem;
  background: #f9fafc;
}

.win-main h3 {
  margin: 0 0 0.75rem;
  font-size: 13px;
}

.win-row {
  display: grid;
  grid-template-columns: 64px 1fr;
  gap: 0.5rem;
  align-items: center;
  margin-bottom: 0.5rem;
}

.win-row label {
  color: var(--ink-soft);
  font-size: 11px;
}

.win-select {
  background: #fff;
  border: 1px solid #cfd9e8;
  border-radius: 4px;
  padding: 0.35rem 0.5rem;
  font-size: 11px;
}

.win-actions {
  display: flex;
  gap: 0.4rem;
  margin: 0.75rem 0;
}

.win-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.35rem 0.7rem;
  border-radius: 4px;
  border: 1px solid #b8c6da;
  background: #fff;
  font-size: 11px;
  font-weight: 600;
  color: var(--ink);
}

.win-btn.primary {
  background: var(--brand);
  border-color: var(--brand-dark);
  color: #fff;
}

.win-log {
  background: #fff;
  border: 1px solid #d7e0ec;
  border-radius: 4px;
  padding: 0.55rem 0.65rem;
  min-height: 72px;
}

.win-log p {
  margin: 0 0 0.2rem;
  color: #6a778c;
  font-size: 10.5px;
}

.win-log .ok {
  color: var(--brand-dark);
  font-weight: 600;
}

.win-panel {
  padding: 1rem;
  background: #f8fafc;
}

.win-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem;
  margin-bottom: 0.85rem;
}

.win-tags span {
  background: #e8f0fb;
  color: var(--brand-dark);
  border-radius: 3px;
  padding: 0.2rem 0.45rem;
  font-size: 10.5px;
  font-weight: 600;
}

.win-progress {
  height: 8px;
  background: #dde6f2;
  border-radius: 99px;
  overflow: hidden;
  margin-bottom: 0.85rem;
}

.win-progress i {
  display: block;
  height: 100%;
  background: linear-gradient(90deg, var(--brand), #5b9cf0);
}

.win-checklist {
  margin: 0 0 0.9rem;
  padding-left: 1.1rem;
  color: var(--ink-soft);
  font-size: 12px;
}

.win-diag {
  background: #fff;
  border: 1px solid #d7e0ec;
  border-radius: 4px;
  padding: 0.7rem 0.8rem;
  margin-bottom: 0.75rem;
}

.win-diag > div {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 0.35rem;
}

.win-diag p {
  margin: 0;
  color: var(--ink-soft);
  font-size: 11px;
}

.badge {
  font-size: 10px;
  font-weight: 700;
  padding: 0.15rem 0.4rem;
  border-radius: 3px;
}

.badge.bad {
  background: #ffe8e6;
  color: #c23b2e;
}

.win-error-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0.4rem;
  margin-bottom: 0.85rem;
}

.win-error-grid span {
  text-align: center;
  background: #fff;
  border: 1px solid #d5deea;
  border-radius: 4px;
  padding: 0.45rem 0.25rem;
  font-size: 11px;
  font-weight: 600;
}

.cad-panel .win-hero-banner {
  background: var(--brand);
  color: #fff;
  font-weight: 700;
  font-size: 13px;
  padding: 0.65rem 0.75rem;
  border-radius: 4px;
  margin-bottom: 0.55rem;
}

.win-muted {
  margin: 0 0 0.75rem;
  color: var(--ink-soft);
  font-size: 11px;
}

.win-mini-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.4rem;
  margin-top: 0.85rem;
}

.win-mini-grid span {
  background: #fff;
  border: 1px solid #d5deea;
  border-radius: 4px;
  padding: 0.5rem;
  font-size: 11px;
  font-weight: 600;
}

/* CAD gallery */
.cad-gallery {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1.75rem 1.5rem;
  align-items: stretch;
}

.cad-shot {
  display: flex;
  flex-direction: column;
  min-width: 0;
}

.cad-shot h3 {
  margin: 0.9rem 0 0.35rem;
  font-size: 1.08rem;
}

.cad-shot > p {
  margin: 0;
  color: var(--ink-soft);
  font-size: 0.95rem;
  line-height: 1.55;
  flex: 1;
}

.plugin-win {
  display: flex;
  flex-direction: column;
  height: 12.5rem;
  background: #f4f7fb;
  border: 1px solid var(--line);
  border-radius: 6px;
  overflow: hidden;
  box-shadow: var(--shadow-soft);
  flex-shrink: 0;
}

.plugin-bar {
  background: #1b6ca8;
  color: #fff;
  font-size: 12px;
  font-weight: 700;
  padding: 0.55rem 0.75rem;
  flex-shrink: 0;
}

.plugin-body {
  display: grid;
  grid-template-columns: 88px 1fr;
  flex: 1;
  min-height: 0;
  background: #fff;
}

.plugin-side {
  background: #eef3f9;
  border-right: 1px solid var(--line);
  padding: 0.65rem;
  font-size: 10.5px;
  color: var(--ink-soft);
  line-height: 1.7;
}

.plugin-main {
  display: flex;
  flex-direction: column;
  padding: 0.65rem 0.75rem;
  min-height: 0;
}

.plugin-main p {
  margin: 0 0 0.4rem;
  font-size: 11px;
  font-weight: 600;
}

.plugin-list {
  flex: 1;
  min-height: 0;
}

.plugin-list i,
.plugin-form span {
  display: block;
  height: 18px;
  margin-bottom: 0.35rem;
  background: #e8eef7;
  border-radius: 3px;
}

.plugin-list.tall i {
  height: 22px;
}

.plugin-btns {
  display: flex;
  gap: 0.35rem;
  margin-top: auto;
  padding-top: 0.45rem;
}

.plugin-btns b,
.plugin-btns span {
  font-size: 10.5px;
  font-weight: 600;
  padding: 0.3rem 0.55rem;
  border-radius: 3px;
}

.plugin-btns b {
  background: #1b6ca8;
  color: #fff;
}

.plugin-btns span {
  background: #fff;
  border: 1px solid #c5d2e2;
  color: var(--ink);
}

.plugin-stack {
  grid-template-columns: 1fr;
  display: flex;
  flex-direction: column;
  padding: 0.65rem 0.75rem;
}

.plugin-alert {
  background: #fff4ef;
  color: #b54a2f;
  font-size: 11px;
  font-weight: 600;
  padding: 0.4rem 0.55rem;
  border-radius: 3px;
  margin-bottom: 0.5rem;
  flex-shrink: 0;
}

.plugin-alert.ok {
  background: #eaf7ef;
  color: #1f7a45;
}

.plugin-form {
  flex: 1;
}

/* Sections */
.section {
  padding: clamp(3.5rem, 8vw, 5.5rem) 0;
}

.section-head {
  max-width: 36rem;
  margin-bottom: 2.5rem;
}

.section-head h2 {
  margin: 0 0 0.65rem;
  font-family: var(--font-body);
  font-size: clamp(1.55rem, 3vw, 2rem);
  font-weight: 700;
  letter-spacing: -0.02em;
  line-height: 1.25;
}

.section-head p {
  margin: 0;
  color: var(--ink-soft);
  font-size: 1.05rem;
}

.section-head-wide {
  max-width: 42rem;
}

/* Feature articles (capabilities) */
.feature-list {
  display: flex;
  flex-direction: column;
  border-top: 1px solid var(--line);
}

.feature-article {
  display: grid;
  grid-template-columns: 3.25rem minmax(0, 1fr);
  gap: clamp(1rem, 3vw, 2.25rem);
  padding: clamp(1.75rem, 4vw, 2.5rem) 0;
  border-bottom: 1px solid var(--line);
  align-items: start;
}

.feature-index {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 3.25rem;
  height: 3.25rem;
  margin: 0;
  border-radius: 50%;
  background: rgba(39, 116, 229, 0.1);
  background: color-mix(in srgb, var(--brand) 12%, var(--white));
  font-family: var(--font-display);
  font-size: 1.05rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  color: var(--brand);
  line-height: 1;
  flex-shrink: 0;
}

.feature-body h3 {
  margin: 0 0 0.55rem;
  font-size: clamp(1.2rem, 2.2vw, 1.45rem);
  font-weight: 700;
  letter-spacing: -0.02em;
  line-height: 1.3;
  color: var(--ink);
}

.feature-lead {
  margin: 0 0 0.65rem;
  font-size: 1.02rem;
  font-weight: 500;
  line-height: 1.65;
  color: var(--ink);
}

.feature-body > p:last-child {
  margin: 0;
  color: var(--ink-soft);
  font-size: 0.98rem;
  line-height: 1.75;
  max-width: 46rem;
}

.feature-body a {
  font-weight: 600;
}

/* Pain */
.pain {
  background: var(--white);
  border-block: 1px solid var(--line);
}

.capabilities {
  background: var(--paper);
}

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

.pain-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0;
}

.pain-list li {
  display: grid;
  grid-template-columns: 3.25rem 1fr;
  gap: 1.25rem;
  padding: 1.5rem 0;
  border-top: 1px solid var(--line);
  align-items: start;
}

.pain-list li:last-child {
  border-bottom: 1px solid var(--line);
}

.pain-num {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 3.25rem;
  height: 3.25rem;
  border-radius: 50%;
  background: rgba(39, 116, 229, 0.1);
  background: color-mix(in srgb, var(--brand) 12%, var(--white));
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 1.05rem;
  color: var(--brand);
  letter-spacing: -0.02em;
  line-height: 1;
  flex-shrink: 0;
}

.pain-list h3 {
  margin: 0 0 0.35rem;
  font-size: 1.15rem;
}

.pain-list p {
  margin: 0;
  color: var(--ink-soft);
}

/* Steps */
.how {
  background: var(--paper);
}

.steps {
  list-style: none;
  margin: 0;
  padding: 0;
  counter-reset: step;
  display: grid;
  gap: 1.25rem;
}

.steps li {
  counter-increment: step;
  display: grid;
  grid-template-columns: 3.25rem 1fr;
  gap: 0.35rem 1.25rem;
  align-items: start;
  padding: 1.25rem 0;
  border-bottom: 1px solid var(--line);
}

.steps li::before {
  content: counter(step, decimal-leading-zero);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 3.25rem;
  height: 3.25rem;
  border-radius: 50%;
  background: rgba(39, 116, 229, 0.1);
  background: color-mix(in srgb, var(--brand) 12%, var(--white));
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 1.05rem;
  color: var(--brand);
  letter-spacing: -0.02em;
  line-height: 1;
  grid-row: 1 / span 2;
}

.steps strong {
  font-size: 1.08rem;
  padding-top: 0.7rem;
}

.steps span {
  color: var(--ink-soft);
  grid-column: 2;
}

/* Membership */
.membership {
  background: var(--white);
}

.membership-panel {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 2rem;
  padding: 2rem 2.25rem;
  border-left: 4px solid var(--vip);
  background: linear-gradient(90deg, #fffdf5 0%, var(--white) 55%);
  box-shadow: var(--shadow-soft);
}

.membership-panel h2 {
  margin: 0 0 0.5rem;
  font-size: 1.45rem;
}

.membership-panel p {
  margin: 0;
  color: var(--ink-soft);
  max-width: 36rem;
}

/* FAQ */
.faq {
  background: var(--paper);
}

.faq-list {
  display: grid;
  gap: 0.65rem;
  max-width: 48rem;
}

.faq-list details {
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 0.15rem 1rem;
}

.faq-list summary {
  cursor: pointer;
  font-weight: 600;
  padding: 0.95rem 0;
  list-style: none;
}

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

.faq-list summary::after {
  content: "+";
  float: right;
  color: var(--brand);
  font-family: var(--font-display);
  font-weight: 600;
}

.faq-list details[open] summary::after {
  content: "–";
}

.faq-list details p {
  margin: 0 0 1rem;
  color: var(--ink-soft);
  padding-right: 1.5rem;
}

/* CTA band */
.cta-band {
  background:
    linear-gradient(135deg, #1a4f9c, var(--brand) 55%, #4d90e8);
  color: #fff;
  text-align: center;
}

.cta-band-inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.75rem;
}

.cta-band h2 {
  margin: 0;
  font-size: clamp(1.4rem, 3vw, 1.85rem);
  max-width: 18em;
}

.cta-band p {
  margin: 0 0 0.5rem;
  color: rgba(255, 255, 255, 0.85);
}

.cta-band .btn-primary {
  background: #fff;
  color: var(--brand-dark);
  border-color: #fff;
}

.cta-band .btn-primary:hover {
  background: #f0f5fc;
  color: var(--brand-deeper);
}

.cta-band-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.65rem;
  justify-content: center;
}

.cta-band .btn-ghost {
  color: #fff;
  border-color: rgba(255, 255, 255, 0.55);
}

.cta-band .btn-ghost:hover {
  background: rgba(255, 255, 255, 0.12);
  color: #fff;
}

/* Footer */
.site-footer {
  background: #101826;
  color: rgba(255, 255, 255, 0.78);
  padding: 3rem 0 2.5rem;
}

.footer-inner {
  display: grid;
  gap: 1.75rem;
}

.footer-brand .brand-name {
  color: #fff;
  display: inline-block;
  margin-bottom: 0.35rem;
}

.footer-brand p {
  margin: 0;
  font-size: 0.95rem;
}

.footer-links {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem 1.5rem;
}

.footer-links a {
  color: rgba(255, 255, 255, 0.85);
  text-decoration: none;
  font-size: 0.95rem;
}

.footer-links a:hover {
  color: #fff;
}

.footer-legal {
  margin: 0;
  font-size: 0.85rem;
  color: rgba(255, 255, 255, 0.5);
  line-height: 1.7;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  padding-top: 1.25rem;
}

.footer-legal a {
  color: rgba(255, 255, 255, 0.62);
  text-decoration: none;
}

.footer-legal a:hover {
  color: #fff;
  text-decoration: underline;
}

/* Motion */
.reveal {
  opacity: 0;
  transform: translateY(14px);
  animation: rise 0.7s ease forwards;
}

.reveal-delay-1 {
  animation-delay: 0.12s;
}

.reveal-delay-2 {
  animation-delay: 0.22s;
}

.reveal-delay-3 {
  animation-delay: 0.32s;
}

.reveal-on-scroll {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity 0.55s ease, transform 0.55s ease;
}

.reveal-on-scroll.is-visible {
  opacity: 1;
  transform: none;
}

@keyframes rise {
  to {
    opacity: 1;
    transform: none;
  }
}

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

  .reveal,
  .reveal-on-scroll {
    opacity: 1;
    transform: none;
    animation: none;
    transition: none;
  }

  .btn-primary:hover {
    transform: none;
  }

  .win-hero {
    transform: none;
  }

  .carousel-slide {
    transition: none;
    transform: none;
  }

  .carousel-slide.is-active {
    transform: none;
  }
}

/* Responsive */
@media (max-width: 980px) {
  .hero-stage {
    grid-template-columns: 1fr;
    gap: 1.75rem;
  }

  .hero-copy {
    max-width: none;
  }

  .hero-shot {
    justify-content: center;
    align-items: center;
  }

  .hero-buildmeta {
    text-align: center;
  }

  .hero-actions .btn {
    width: 100%;
    align-items: center;
  }

  .hero-photo {
    width: 100%;
    height: auto;
  }

  .feature-article {
    grid-template-columns: 2.75rem minmax(0, 1fr);
    gap: 0.85rem;
  }

  .feature-index {
    width: 2.75rem;
    height: 2.75rem;
    font-size: 0.95rem;
  }

  .cad-gallery {
    grid-template-columns: 1fr;
  }

  .membership-panel {
    flex-direction: column;
    align-items: flex-start;
  }
}

@media (max-width: 720px) {
  .nav,
  .header-cta {
    display: none;
  }

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

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

  .pain-list li {
    grid-template-columns: 2.75rem 1fr;
    gap: 0.85rem;
  }

  .pain-num {
    width: 2.75rem;
    height: 2.75rem;
    font-size: 0.95rem;
  }

  .hero {
    padding: 1.5rem 0 1.35rem;
  }

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

  .hero-actions .btn {
    width: 100%;
  }

  .win-body {
    grid-template-columns: 96px 1fr;
    min-height: 260px;
  }
}