:root {
  color-scheme: dark;
  --page: #06090b;
  --page-elevated: #0b1114;
  --surface: #0f1619;
  --surface-2: #141c20;
  --surface-3: #1a2429;
  --line: rgba(220, 236, 240, 0.09);
  --line-strong: rgba(80, 230, 214, 0.28);
  --text: #eef6f7;
  --muted: #8f9fa6;
  --dim: #67767d;
  --accent: #2be2c7;
  --accent-soft: #7af5e6;
  --accent-deep: #1ab8a2;
  --accent-ink: #031413;
  --amber: #e8b86a;
  --blue: #5b9dff;
  --radius: 22px;
  --radius-sm: 16px;
  --radius-phone: 30px;
  --max: 1140px;
  --shadow: 0 24px 64px rgba(0, 0, 0, 0.45);
  --shadow-soft: 0 12px 36px rgba(0, 0, 0, 0.28);
  --ease: cubic-bezier(0.22, 1, 0.36, 1);
  --font: "Segoe UI", "PingFang SC", "Microsoft YaHei", system-ui, sans-serif;
}

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

html {
  scroll-behavior: smooth;
  background: var(--page);
}

body {
  margin: 0;
  min-width: 320px;
  color: var(--text);
  font-family: var(--font);
  background:
    radial-gradient(920px 520px at 8% -6%, rgba(43, 226, 199, 0.11), transparent 58%),
    radial-gradient(720px 440px at 96% 4%, rgba(91, 157, 255, 0.08), transparent 52%),
    radial-gradient(640px 360px at 70% 70%, rgba(43, 226, 199, 0.04), transparent 55%),
    var(--page);
  -webkit-font-smoothing: antialiased;
  text-rendering: geometricPrecision;
}

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

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

button {
  font: inherit;
  color: inherit;
}

h1,
h2,
h3,
p,
ul,
ol,
dl,
figure {
  margin: 0;
}

.skip-link {
  position: fixed;
  top: 12px;
  left: 12px;
  z-index: 80;
  transform: translateY(-160%);
  border-radius: 999px;
  background: var(--accent);
  color: var(--accent-ink);
  padding: 10px 14px;
  font-weight: 700;
}

.skip-link:focus-visible {
  transform: translateY(0);
}

/* —— Header —— */
.site-header {
  position: sticky;
  top: 0;
  z-index: 40;
  border-bottom: 1px solid transparent;
  background: rgba(6, 9, 11, 0.52);
  backdrop-filter: blur(22px) saturate(150%);
  -webkit-backdrop-filter: blur(22px) saturate(150%);
  transition: background 220ms var(--ease), border-color 220ms var(--ease);
}

.site-header.is-scrolled {
  border-bottom-color: var(--line);
  background: rgba(6, 9, 11, 0.86);
}

.nav-shell {
  width: min(var(--max), calc(100% - 40px));
  min-height: 64px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 11px;
  font-size: 17px;
  font-weight: 750;
  letter-spacing: -0.01em;
  white-space: nowrap;
}

.brand-mark {
  width: 36px;
  height: 36px;
  flex: 0 0 auto;
  border-radius: 10px;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 26px;
  color: rgba(238, 246, 247, 0.7);
  font-size: 14px;
  font-weight: 560;
}

.nav-links a {
  position: relative;
  transition: color 160ms var(--ease);
}

.nav-links a::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: -6px;
  height: 2px;
  border-radius: 999px;
  background: var(--accent);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 180ms var(--ease);
}

.nav-links a:hover,
.site-footer a:hover {
  color: var(--accent-soft);
}

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

.nav-cta {
  min-height: 40px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--line-strong);
  border-radius: 999px;
  padding: 0 18px;
  color: var(--accent-soft);
  font-size: 14px;
  font-weight: 700;
  background: rgba(43, 226, 199, 0.06);
  transition: background 160ms var(--ease), border-color 160ms var(--ease), transform 160ms var(--ease), box-shadow 160ms var(--ease);
}

.nav-cta:hover {
  background: rgba(43, 226, 199, 0.14);
  border-color: rgba(122, 245, 230, 0.55);
  box-shadow: 0 0 0 4px rgba(43, 226, 199, 0.08);
}

/* —— Shared —— */
.section {
  width: min(var(--max), calc(100% - 40px));
  margin: 0 auto;
  padding: 72px 0;
  scroll-margin-top: 80px;
}

.section-head {
  max-width: 620px;
  display: grid;
  gap: 12px;
  margin: 0 auto 36px;
  text-align: center;
}

.section-head h2,
.creative-copy h2,
.ar-copy h2,
.privacy-copy h2,
.closing h2 {
  font-size: clamp(28px, 4vw, 42px);
  line-height: 1.14;
  font-weight: 780;
  letter-spacing: -0.025em;
}

.section-head p:not(.eyebrow),
.hero-lead,
.creative-copy > p,
.ar-copy > p:not(.eyebrow),
.privacy-copy p:not(.eyebrow),
.closing > p,
.bento-copy > p:not(.kicker) {
  color: var(--muted);
  font-size: 16px;
  line-height: 1.7;
}

.eyebrow,
.kicker {
  color: var(--accent-soft);
  font-size: 12px;
  font-weight: 750;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.kicker {
  letter-spacing: 0.06em;
}

.button {
  min-height: 46px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 999px;
  padding: 0 22px;
  border: 0;
  font-size: 15px;
  font-weight: 720;
  cursor: pointer;
  transition: transform 160ms var(--ease), background 160ms var(--ease), border-color 160ms var(--ease), box-shadow 160ms var(--ease);
}

.button:active,
.nav-cta:active {
  transform: translateY(1px) scale(0.99);
}

.button.primary {
  background: linear-gradient(180deg, #8ef8ea 0%, var(--accent) 55%, var(--accent-deep) 100%);
  color: var(--accent-ink);
  box-shadow:
    0 12px 32px rgba(43, 226, 199, 0.26),
    inset 0 1px 0 rgba(255, 255, 255, 0.35);
}

.button.primary:hover {
  box-shadow:
    0 16px 40px rgba(43, 226, 199, 0.34),
    inset 0 1px 0 rgba(255, 255, 255, 0.4);
  transform: translateY(-1px);
}

.button.ghost {
  border: 1px solid rgba(238, 246, 247, 0.2);
  background: rgba(8, 12, 14, 0.4);
  color: var(--text);
  backdrop-filter: blur(8px);
}

.button.ghost:hover {
  border-color: rgba(122, 245, 230, 0.45);
  background: rgba(43, 226, 199, 0.06);
}

.button--lg {
  min-height: 52px;
  padding: 0 28px;
  font-size: 16px;
}

/* —— Phone frame: always show full screenshot —— */
.phone-frame {
  position: relative;
  margin: 0;
  overflow: hidden;
  border: 1px solid rgba(238, 246, 247, 0.14);
  border-radius: var(--radius-phone);
  background: #020405;
  box-shadow:
    var(--shadow),
    inset 0 0 0 1px rgba(255, 255, 255, 0.04);
}

.phone-frame::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 1;
  pointer-events: none;
  border-radius: inherit;
  box-shadow: inset 0 0 0 1px rgba(255, 255, 255, 0.06);
}

.phone-frame img {
  width: 100%;
  height: auto;
  display: block;
}

.phone-frame--accent {
  border-color: rgba(232, 184, 106, 0.38);
  box-shadow:
    var(--shadow),
    0 0 0 1px rgba(232, 184, 106, 0.08),
    0 0 40px rgba(232, 184, 106, 0.08);
}

/* —— Hero —— */
.hero {
  position: relative;
  width: min(var(--max), calc(100% - 40px));
  margin: 0 auto;
  padding: 40px 0 64px;
  overflow: hidden;
}

.hero-glow {
  position: absolute;
  inset: -18% 8% auto;
  height: 58%;
  z-index: -1;
  pointer-events: none;
  background:
    radial-gradient(ellipse at 38% 42%, rgba(43, 226, 199, 0.18), transparent 56%),
    radial-gradient(ellipse at 72% 58%, rgba(91, 157, 255, 0.1), transparent 50%);
  filter: blur(10px);
}

.hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.08fr) minmax(300px, 0.92fr);
  gap: 40px;
  align-items: center;
}

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

.hero h1 {
  max-width: 16ch;
  font-size: clamp(34px, 4.8vw, 54px);
  line-height: 1.08;
  font-weight: 820;
  letter-spacing: -0.03em;
}

.hero h1 span {
  display: block;
  background: linear-gradient(105deg, var(--text) 18%, var(--accent-soft) 92%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.hero-lead {
  max-width: 44ch;
  font-size: 17px;
}

/* 三种记录方式对比：突出第三种 */
.record-modes {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
  margin-top: 36px;
}

.record-mode {
  position: relative;
  display: grid;
  gap: 8px;
  align-content: start;
  min-height: 132px;
  padding: 18px 16px;
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  background:
    linear-gradient(180deg, rgba(238, 246, 247, 0.03), transparent 72%),
    var(--surface);
}

.record-mode__num {
  font-size: 12px;
  font-weight: 780;
  letter-spacing: 0.08em;
  color: var(--dim);
}

.record-mode strong {
  font-size: 17px;
  font-weight: 760;
  letter-spacing: -0.01em;
}

.record-mode p {
  color: var(--muted);
  font-size: 13.5px;
  line-height: 1.5;
}

.record-mode--active {
  border-color: rgba(122, 245, 230, 0.38);
  background:
    radial-gradient(circle at 12% 0%, rgba(43, 226, 199, 0.18), transparent 46%),
    linear-gradient(160deg, rgba(43, 226, 199, 0.12), transparent 55%),
    var(--surface);
  box-shadow: 0 16px 40px rgba(0, 0, 0, 0.22);
}

.record-mode--active .record-mode__num {
  color: var(--accent-soft);
}

.record-mode--active strong {
  color: var(--accent-soft);
}

.record-mode__badge {
  position: absolute;
  top: 14px;
  right: 14px;
  min-height: 24px;
  display: inline-flex;
  align-items: center;
  border-radius: 999px;
  padding: 0 10px;
  background: rgba(43, 226, 199, 0.18);
  color: var(--accent-soft);
  font-size: 11px;
  font-weight: 780;
  letter-spacing: 0.04em;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 4px;
}

.hero-proof {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  padding: 0;
  list-style: none;
  margin-top: 4px;
}

.hero-proof li {
  min-height: 32px;
  display: inline-flex;
  align-items: center;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: rgba(16, 23, 26, 0.72);
  padding: 0 12px;
  color: rgba(238, 246, 247, 0.8);
  font-size: 12.5px;
  font-weight: 600;
  transition: border-color 160ms var(--ease), background 160ms var(--ease);
}

.hero-proof li:hover {
  border-color: rgba(122, 245, 230, 0.28);
  background: rgba(43, 226, 199, 0.08);
}

.hero-phones {
  position: relative;
  min-height: 0;
  display: grid;
  place-items: center;
  padding: 12px 0 8px;
}

.hero-phones .phone-frame--back {
  position: absolute;
  width: min(230px, 46%);
  left: 6%;
  top: 8%;
  transform: rotate(-8deg);
  opacity: 0.72;
  z-index: 1;
  filter: saturate(0.92);
}

.hero-phones .phone-frame--front {
  position: relative;
  width: min(268px, 56%);
  margin-left: 16%;
  z-index: 2;
  transform: rotate(2.5deg);
  transition: transform 280ms var(--ease);
}

.hero-phones:hover .phone-frame--front {
  transform: rotate(0deg) translateY(-4px);
}

.hero-phones:hover .phone-frame--back {
  opacity: 0.82;
}

/* —— Flow —— */
.flow-track {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 12px;
  margin: 0 0 24px;
  padding: 0;
  list-style: none;
}

.flow-track li {
  position: relative;
  display: grid;
  gap: 8px;
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  background:
    linear-gradient(180deg, rgba(238, 246, 247, 0.045), transparent 70%),
    var(--surface);
  padding: 18px 16px;
  transition: border-color 180ms var(--ease), transform 180ms var(--ease), box-shadow 180ms var(--ease);
}

.flow-track li:hover {
  border-color: rgba(122, 245, 230, 0.28);
  transform: translateY(-2px);
  box-shadow: var(--shadow-soft);
}

.flow-num {
  color: var(--accent-soft);
  font-size: 12px;
  font-weight: 800;
  letter-spacing: 0.06em;
}

.flow-track strong {
  font-size: 17px;
  font-weight: 740;
  letter-spacing: -0.01em;
}

.flow-track span:last-child {
  color: var(--muted);
  font-size: 13.5px;
  line-height: 1.55;
}

/* —— Bento —— */
.bento {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
  align-items: stretch;
}

.bento-card {
  display: grid;
  grid-template-rows: auto 1fr;
  gap: 0;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background:
    linear-gradient(165deg, rgba(43, 226, 199, 0.07), transparent 40%),
    var(--surface);
  transition: border-color 200ms var(--ease), transform 200ms var(--ease), box-shadow 200ms var(--ease);
}

.bento-card:hover {
  border-color: rgba(122, 245, 230, 0.26);
  transform: translateY(-3px);
  box-shadow: 0 20px 48px rgba(0, 0, 0, 0.32);
}

/* Wide feature: copy + full phone side by side, no empty stretch */
.bento-card--wide {
  grid-column: 1 / -1;
  grid-template-columns: minmax(0, 1fr) minmax(220px, 280px);
  grid-template-rows: auto;
  align-items: center;
  gap: 12px 8px;
  padding: 12px 20px 12px 12px;
  background:
    radial-gradient(circle at 88% 30%, rgba(43, 226, 199, 0.1), transparent 34%),
    linear-gradient(120deg, rgba(43, 226, 199, 0.08), transparent 48%),
    var(--surface);
}

.bento-card--wide .bento-copy {
  padding: 28px 16px 28px 28px;
  align-content: center;
}

.bento-copy {
  display: grid;
  align-content: start;
  gap: 10px;
  padding: 22px 22px 8px;
}

.bento-copy h3 {
  font-size: clamp(20px, 2.1vw, 26px);
  line-height: 1.22;
  font-weight: 760;
  letter-spacing: -0.02em;
}

.pill-row {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 4px;
}

.pill-row span {
  min-height: 30px;
  display: inline-flex;
  align-items: center;
  border: 1px solid rgba(115, 244, 229, 0.16);
  border-radius: 999px;
  background: rgba(3, 8, 8, 0.4);
  padding: 0 11px;
  color: rgba(238, 246, 247, 0.84);
  font-size: 12px;
  font-weight: 680;
}

/* Screenshot stage: centers a full phone mockup, never crops */
.bento-shot {
  margin: 0;
  display: flex;
  align-items: flex-end;
  justify-content: center;
  padding: 8px 20px 22px;
  background:
    radial-gradient(ellipse at 50% 100%, rgba(43, 226, 199, 0.08), transparent 55%),
    linear-gradient(180deg, transparent, rgba(2, 4, 5, 0.35));
  border: 0;
  min-height: 0;
  max-height: none;
  overflow: visible;
}

.bento-shot .phone-frame {
  width: min(100%, 248px);
  box-shadow:
    0 18px 40px rgba(0, 0, 0, 0.4),
    inset 0 0 0 1px rgba(255, 255, 255, 0.05);
}

.bento-card--wide .bento-shot {
  padding: 10px 4px 10px 0;
  background: transparent;
  align-items: center;
  justify-content: flex-end;
}

.bento-card--wide .bento-shot .phone-frame {
  width: min(100%, 260px);
}

.bento-shot img,
.bento-shot--tall img {
  width: 100%;
  height: auto;
  min-height: 0;
  max-height: none;
  object-fit: unset;
}

/* —— Advanced edit —— */
.edit {
  padding-top: 24px;
}

.edit-shell {
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(240px, 300px);
  gap: 36px;
  align-items: center;
  border: 1px solid rgba(122, 245, 230, 0.22);
  border-radius: calc(var(--radius) + 6px);
  background:
    radial-gradient(circle at 86% 24%, rgba(43, 226, 199, 0.14), transparent 32%),
    radial-gradient(circle at 18% 78%, rgba(91, 157, 255, 0.08), transparent 36%),
    linear-gradient(145deg, rgba(16, 22, 26, 0.98), rgba(10, 14, 16, 0.99));
  padding: 36px;
  box-shadow: 0 28px 80px rgba(0, 0, 0, 0.26);
}

.edit-copy {
  display: grid;
  gap: 16px;
}

.edit-copy h2 {
  font-size: clamp(28px, 4vw, 42px);
  line-height: 1.14;
  font-weight: 780;
  letter-spacing: -0.025em;
}

.edit-copy > p {
  color: var(--muted);
  font-size: 16px;
  line-height: 1.7;
}

.edit-phone {
  width: 100%;
  max-width: 280px;
  justify-self: center;
}

/* —— Creative —— */
.creative {
  padding-top: 48px;
}

.creative-shell {
  display: grid;
  grid-template-columns: minmax(0, 0.95fr) minmax(300px, 1.05fr);
  gap: 36px;
  align-items: center;
  border: 1px solid rgba(232, 184, 106, 0.2);
  border-radius: calc(var(--radius) + 6px);
  background:
    radial-gradient(circle at 90% 18%, rgba(232, 184, 106, 0.14), transparent 30%),
    radial-gradient(circle at 16% 84%, rgba(43, 226, 199, 0.08), transparent 34%),
    linear-gradient(150deg, rgba(18, 24, 28, 0.98), rgba(10, 14, 16, 0.99));
  padding: 36px;
  box-shadow: 0 28px 80px rgba(0, 0, 0, 0.28);
}

.creative-copy {
  display: grid;
  gap: 16px;
}

.check-list {
  display: grid;
  gap: 10px;
  margin: 6px 0 0;
  padding: 0;
  list-style: none;
}

.check-list li {
  position: relative;
  padding-left: 22px;
  color: rgba(238, 246, 247, 0.84);
  font-size: 14.5px;
  line-height: 1.55;
}

.check-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.45em;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 0 3px rgba(43, 226, 199, 0.16);
}

.creative-phones {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
  align-items: end;
}

.creative-phones .phone-frame {
  width: 100%;
  transition: transform 240ms var(--ease);
}

.creative-phones .phone-frame--accent {
  transform: translateY(-10px);
}

.creative-shell:hover .phone-frame--accent {
  transform: translateY(-16px);
}

/* —— AR —— */
.ar-shell {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(240px, 300px);
  gap: 36px;
  align-items: center;
  border: 1px solid var(--line);
  border-radius: calc(var(--radius) + 6px);
  background:
    radial-gradient(circle at 82% 34%, rgba(43, 226, 199, 0.14), transparent 32%),
    linear-gradient(135deg, rgba(43, 226, 199, 0.06), rgba(91, 157, 255, 0.04) 48%, var(--surface));
  padding: 36px;
}

.ar-copy {
  display: grid;
  gap: 16px;
}

.metric-list {
  display: grid;
  gap: 0;
  margin-top: 8px;
}

.metric-list div {
  display: grid;
  grid-template-columns: 88px minmax(0, 1fr);
  gap: 14px;
  border-top: 1px solid var(--line);
  padding: 14px 0;
}

.metric-list dt {
  color: var(--accent-soft);
  font-size: 13px;
  font-weight: 780;
}

.metric-list dd {
  margin: 0;
  color: var(--muted);
  font-size: 14.5px;
  line-height: 1.55;
}

.ar-phone {
  width: 100%;
  max-width: 280px;
  justify-self: center;
}

/* —— Features —— */
.feature-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 12px;
}

.feature-tile {
  min-height: 188px;
  display: grid;
  align-content: space-between;
  gap: 24px;
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  background:
    linear-gradient(180deg, rgba(238, 246, 247, 0.035), transparent),
    var(--surface);
  padding: 22px;
  transition: border-color 180ms var(--ease), transform 180ms var(--ease), box-shadow 180ms var(--ease);
}

.feature-tile:hover {
  border-color: rgba(115, 244, 229, 0.28);
  transform: translateY(-3px);
  box-shadow: var(--shadow-soft);
}

.feature-tile--accent {
  background:
    linear-gradient(165deg, rgba(43, 226, 199, 0.18), rgba(91, 157, 255, 0.06)),
    var(--surface);
}

.feature-tile--wide {
  grid-column: span 2;
  background:
    linear-gradient(120deg, rgba(232, 184, 106, 0.12), transparent 52%),
    var(--surface);
}

.tile-num {
  color: var(--accent-soft);
  font-size: 12px;
  font-weight: 820;
  letter-spacing: 0.08em;
}

.feature-tile h3 {
  font-size: 19px;
  font-weight: 740;
  letter-spacing: -0.01em;
}

.feature-tile p {
  color: var(--muted);
  font-size: 14.5px;
  line-height: 1.6;
}

/* —— Showcase —— */
.splat-gallery {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
}

.splat-card {
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background:
    linear-gradient(160deg, rgba(43, 226, 199, 0.07), transparent 45%),
    var(--surface);
  transition: border-color 180ms var(--ease), transform 180ms var(--ease);
}

.splat-card:hover {
  border-color: rgba(122, 245, 230, 0.3);
  transform: translateY(-2px);
}

.splat-card--wide {
  grid-column: 1 / -1;
  display: grid;
  grid-template-columns: minmax(220px, 0.32fr) minmax(0, 1fr);
}

.splat-meta {
  display: grid;
  align-content: start;
  gap: 10px;
  padding: 20px;
}

.splat-meta h3 {
  font-size: 21px;
  line-height: 1.22;
  font-weight: 740;
  letter-spacing: -0.015em;
}

.tag {
  width: fit-content;
  min-height: 28px;
  display: inline-flex;
  align-items: center;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: rgba(5, 8, 10, 0.4);
  padding: 0 10px;
  color: var(--dim);
  font-size: 11.5px;
  font-weight: 680;
}

.splat-frame {
  position: relative;
  aspect-ratio: 16 / 10;
  min-height: 300px;
  overflow: hidden;
  border-top: 1px solid var(--line);
  background:
    radial-gradient(circle at 50% 42%, rgba(43, 226, 199, 0.12), transparent 36%),
    #020405;
}

.splat-card--wide .splat-meta {
  align-content: center;
}

.splat-card--wide .splat-frame {
  min-height: 400px;
  border-top: 0;
  border-left: 1px solid var(--line);
}

.splat-frame::before {
  content: "加载 3D 展示…";
  position: absolute;
  inset: 0;
  z-index: 1;
  display: grid;
  place-items: center;
  color: var(--dim);
  font-size: 13px;
  background: rgba(2, 4, 5, 0.72);
  transition: opacity 220ms ease;
}

.splat-frame iframe {
  width: 100%;
  height: 100%;
  border: 0;
  display: block;
  opacity: 0;
  transition: opacity 220ms ease;
}

.splat-card.is-loaded .splat-frame::before {
  pointer-events: none;
  opacity: 0;
}

.splat-card.is-loaded .splat-frame iframe {
  opacity: 1;
}

/* —— Privacy —— */
.privacy-panel {
  display: grid;
  grid-template-columns: minmax(0, 0.95fr) minmax(300px, 1fr);
  gap: 40px;
  align-items: start;
  border: 1px solid var(--line);
  border-radius: calc(var(--radius) + 6px);
  background:
    linear-gradient(145deg, rgba(43, 226, 199, 0.05), transparent 40%),
    var(--surface);
  padding: 36px;
}

.privacy-copy {
  display: grid;
  gap: 14px;
}

.advantage-list {
  border-top: 1px solid var(--line);
}

.advantage-row {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 24px;
  border-bottom: 1px solid var(--line);
  padding: 18px 0;
  transition: padding-left 180ms var(--ease);
}

.advantage-row:hover {
  padding-left: 6px;
}

.advantage-row strong {
  min-width: 88px;
  font-size: 16px;
  font-weight: 740;
  color: var(--accent-soft);
}

.advantage-row span {
  color: var(--muted);
  font-size: 14.5px;
  line-height: 1.6;
}

/* —— Ecosystem / roadmap —— */
.ecosystem .section-head {
  margin-bottom: 28px;
}

.eco-now {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  gap: 18px 24px;
  align-items: center;
  margin-bottom: 16px;
  padding: 20px 22px;
  border: 1px solid rgba(122, 245, 230, 0.28);
  border-radius: var(--radius);
  background:
    radial-gradient(circle at 8% 20%, rgba(43, 226, 199, 0.16), transparent 36%),
    linear-gradient(120deg, rgba(43, 226, 199, 0.1), transparent 55%),
    var(--surface);
  box-shadow: 0 16px 40px rgba(0, 0, 0, 0.22);
}

.eco-now__badge {
  min-height: 30px;
  display: inline-flex;
  align-items: center;
  border-radius: 999px;
  padding: 0 12px;
  background: rgba(43, 226, 199, 0.16);
  color: var(--accent-soft);
  font-size: 12px;
  font-weight: 780;
  letter-spacing: 0.04em;
  white-space: nowrap;
}

.eco-now__body {
  display: grid;
  gap: 4px;
  min-width: 0;
}

.eco-now__body strong {
  font-size: 17px;
  font-weight: 740;
  letter-spacing: -0.01em;
}

.eco-now__body p {
  color: var(--muted);
  font-size: 14.5px;
  line-height: 1.55;
}

.eco-now__cta {
  min-height: 42px;
  padding: 0 18px;
  white-space: nowrap;
}

.eco-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
}

.eco-card {
  display: grid;
  gap: 10px;
  align-content: start;
  min-height: 168px;
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  background:
    linear-gradient(180deg, rgba(238, 246, 247, 0.035), transparent 72%),
    var(--surface);
  padding: 18px;
  transition: border-color 180ms var(--ease), transform 180ms var(--ease), box-shadow 180ms var(--ease);
}

.eco-card:hover {
  border-color: rgba(122, 245, 230, 0.26);
  transform: translateY(-2px);
  box-shadow: var(--shadow-soft);
}

.eco-card--live {
  border-color: rgba(122, 245, 230, 0.28);
  background:
    linear-gradient(160deg, rgba(43, 226, 199, 0.14), transparent 50%),
    var(--surface);
}

.eco-card--cap {
  background:
    linear-gradient(145deg, rgba(91, 157, 255, 0.1), transparent 48%),
    var(--surface);
}

.eco-card__top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
}

.eco-card__platform {
  color: rgba(238, 246, 247, 0.88);
  font-size: 13px;
  font-weight: 760;
  letter-spacing: 0.02em;
}

.eco-status {
  min-height: 24px;
  display: inline-flex;
  align-items: center;
  border-radius: 999px;
  padding: 0 9px;
  font-size: 11px;
  font-weight: 740;
  letter-spacing: 0.03em;
  white-space: nowrap;
}

.eco-status--live {
  background: rgba(43, 226, 199, 0.16);
  color: var(--accent-soft);
}

.eco-status--next {
  background: rgba(232, 184, 106, 0.14);
  color: #f0c98a;
}

.eco-status--plan {
  background: rgba(238, 246, 247, 0.06);
  color: var(--dim);
}

.eco-status--open {
  background: rgba(91, 157, 255, 0.14);
  color: #9dc2ff;
}

.eco-card h3 {
  font-size: 17px;
  font-weight: 740;
  letter-spacing: -0.01em;
  line-height: 1.3;
}

.eco-card p {
  color: var(--muted);
  font-size: 13.5px;
  line-height: 1.55;
}

.eco-footnote {
  margin-top: 16px;
  color: var(--dim);
  font-size: 13px;
  line-height: 1.55;
  text-align: center;
}

/* —— Closing —— */
.closing {
  display: grid;
  justify-items: center;
  gap: 16px;
  text-align: center;
  padding-bottom: 100px;
}

.closing h2 {
  max-width: 16ch;
}

.closing > p {
  max-width: 46ch;
}

.download-noscript {
  max-width: 46ch;
  color: var(--muted);
  font-size: 13px;
}

/* —— Download panel —— */
.download-panel {
  position: fixed;
  right: 20px;
  bottom: 20px;
  z-index: 1200;
  width: min(520px, calc(100vw - 40px));
  padding: 20px;
  border: 1px solid var(--line-strong);
  border-radius: 22px;
  background:
    linear-gradient(145deg, rgba(43, 226, 199, 0.1), rgba(91, 157, 255, 0.05)),
    rgba(8, 12, 14, 0.96);
  box-shadow: 0 28px 80px rgba(0, 0, 0, 0.52);
  backdrop-filter: blur(22px);
  -webkit-backdrop-filter: blur(22px);
}

.download-panel[hidden],
.download-panel [hidden] {
  display: none;
}

.download-panel[data-state="success"] {
  border-color: rgba(122, 245, 230, 0.55);
}

.download-panel[data-state="error"] {
  border-color: rgba(255, 139, 139, 0.5);
}

.download-panel__header,
.download-panel__status-row {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 16px;
}

.download-panel__eyebrow {
  display: block;
  margin-bottom: 6px;
  color: var(--accent-soft);
  font-size: 11px;
  font-weight: 760;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.download-panel h2 {
  margin: 0;
  font-size: clamp(18px, 2.6vw, 24px);
  line-height: 1.25;
}

.download-panel__action {
  min-height: 36px;
  padding: 0 12px;
  border: 1px solid rgba(238, 246, 247, 0.2);
  border-radius: 999px;
  color: var(--text);
  background: rgba(255, 255, 255, 0.05);
  cursor: pointer;
  transition: background 140ms var(--ease), border-color 140ms var(--ease);
}

.download-panel__action:hover {
  background: rgba(255, 255, 255, 0.1);
  border-color: rgba(238, 246, 247, 0.35);
}

.download-panel progress {
  width: 100%;
  height: 8px;
  margin: 18px 0 10px;
  overflow: hidden;
  border: 0;
  border-radius: 999px;
  accent-color: var(--accent);
  background: rgba(238, 246, 247, 0.12);
}

.download-panel progress::-webkit-progress-bar {
  border-radius: 999px;
  background: rgba(238, 246, 247, 0.12);
}

.download-panel progress::-webkit-progress-value {
  border-radius: 999px;
  background: linear-gradient(90deg, var(--accent-deep), var(--accent-soft));
}

.download-panel__status-row {
  align-items: center;
  font-size: 13.5px;
}

.download-panel__status-row strong {
  color: var(--accent-soft);
  font-variant-numeric: tabular-nums;
}

.download-panel p {
  margin: 10px 0 0;
  color: var(--muted);
  font-size: 13.5px;
  line-height: 1.6;
}

.download-panel__save {
  width: 100%;
  margin-top: 14px;
  border: 0;
}

/* —— Footer —— */
.site-footer {
  width: min(var(--max), calc(100% - 40px));
  min-height: 80px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 13.5px;
  padding: 8px 0 28px;
}

.footer-brand {
  display: flex;
  align-items: center;
  gap: 11px;
}

.footer-brand strong,
.footer-brand span {
  display: block;
}

.footer-brand strong {
  color: var(--text);
  margin-bottom: 2px;
  font-size: 14px;
}

.footer-mark {
  width: 32px;
  height: 32px;
}

:focus-visible {
  outline: 2px solid rgba(122, 245, 230, 0.85);
  outline-offset: 3px;
}

/* Scroll reveal */
.is-reveal {
  opacity: 0;
  transform: translateY(18px);
  transition:
    opacity 560ms var(--ease),
    transform 560ms var(--ease);
}

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

/* —— Responsive —— */
@media (max-width: 1024px) {
  .hero-grid,
  .creative-shell,
  .edit-shell,
  .ar-shell,
  .privacy-panel,
  .bento-card--wide {
    grid-template-columns: 1fr;
  }

  .edit-phone {
    max-width: 280px;
  }

  .hero-phones {
    order: -1;
    max-width: 420px;
    margin: 0 auto;
  }

  .hero-phones .phone-frame--front {
    margin-left: 12%;
  }

  .bento-card--wide {
    padding: 0 0 8px;
    gap: 0;
  }

  .bento-card--wide .bento-copy {
    padding: 24px 22px 8px;
  }

  .bento-card--wide .bento-shot {
    justify-content: center;
    padding: 4px 20px 24px;
  }

  .bento-card--wide .bento-shot .phone-frame {
    width: min(260px, 70%);
  }

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

  .feature-tile--wide {
    grid-column: span 2;
  }

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

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

  .record-modes {
    grid-template-columns: 1fr;
  }

  .record-mode {
    min-height: 0;
  }

  .eco-now {
    grid-template-columns: 1fr;
    justify-items: start;
  }

  .eco-now__cta {
    width: 100%;
  }

  .creative-phones .phone-frame--accent {
    transform: none;
  }

  .creative-shell:hover .phone-frame--accent {
    transform: none;
  }
}

@media (max-width: 720px) {
  .nav-shell,
  .section,
  .hero {
    width: calc(100% - 28px);
  }

  .nav-links {
    display: none;
  }

  .nav-shell {
    min-height: 58px;
  }

  .nav-cta {
    min-height: 36px;
    padding: 0 14px;
    font-size: 13px;
  }

  .section {
    padding: 56px 0;
    scroll-margin-top: 68px;
  }

  .hero {
    padding: 24px 0 40px;
  }

  .hero h1 {
    max-width: none;
    font-size: 34px;
  }

  .hero-actions {
    width: 100%;
  }

  .hero-actions .button {
    flex: 1 1 auto;
  }

  .hero-phones .phone-frame--back {
    width: 42%;
    left: 4%;
    top: 6%;
  }

  .hero-phones .phone-frame--front {
    width: 52%;
  }

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

  .bento-copy {
    padding: 20px 20px 6px;
  }

  .bento-shot {
    padding: 4px 16px 20px;
  }

  .bento-shot .phone-frame {
    width: min(100%, 240px);
  }

  .creative-shell,
  .edit-shell,
  .ar-shell,
  .privacy-panel {
    padding: 22px;
  }

  .edit-phone {
    max-width: 260px;
  }

  .creative-phones {
    grid-template-columns: 1fr 1fr;
    gap: 10px;
  }

  .ar-phone {
    max-width: 260px;
  }

  .metric-list div {
    grid-template-columns: 1fr;
    gap: 4px;
  }

  .feature-grid,
  .flow-track,
  .splat-gallery,
  .eco-grid {
    grid-template-columns: 1fr;
  }

  .feature-tile--wide {
    grid-column: span 1;
  }

  .splat-card--wide {
    display: block;
  }

  .splat-card--wide .splat-frame {
    min-height: 280px;
    border-left: 0;
    border-top: 1px solid var(--line);
  }

  .advantage-row {
    flex-direction: column;
    gap: 6px;
  }

  .closing {
    padding-bottom: 88px;
  }

  .download-panel {
    left: 12px;
    right: 12px;
    bottom: 12px;
    width: auto;
  }

  .site-footer {
    width: calc(100% - 28px);
    flex-direction: column;
    align-items: flex-start;
    padding: 20px 0 28px;
  }
}

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

  *,
  *::before,
  *::after {
    transition-duration: 1ms !important;
    animation-duration: 1ms !important;
  }

  .hero-phones:hover .phone-frame--front,
  .creative-shell:hover .phone-frame--accent,
  .bento-card:hover,
  .feature-tile:hover,
  .flow-track li:hover,
  .splat-card:hover {
    transform: none;
  }
}