/* 音链工坊官网 — 深海青蓝 × 香槟金 */
:root {
  --bg-deep: #0a0e16;
  --bg: #101622;
  --bg-wash: #152033;
  --panel: #141c28;
  --panel-raised: #1c2838;
  --text: #d8d0c2;
  --text-muted: #b8a890;
  --accent: #36c8f0;
  --accent-deep: #1a6799;
  --gold: #e4d6bc;
  --gold-muted: #c9b89a;
  --danger: #b07078;
  --shell: 1200px;
  --gutter: 24px;
  --pad-x: clamp(20px, 4vw, 48px);
  --font-display: "Clash Display", "Noto Sans SC", sans-serif;
  --font-body: "Satoshi", "Noto Sans SC", sans-serif;
  --ease: cubic-bezier(0.22, 1, 0.36, 1);
}

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

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-height: 100vh;
  color: var(--text);
  font-family: var(--font-body);
  font-weight: 400;
  line-height: 1.65;
  background:
    radial-gradient(1200px 600px at 12% -10%, rgba(54, 200, 240, 0.14), transparent 55%),
    radial-gradient(900px 500px at 88% 8%, rgba(228, 214, 188, 0.08), transparent 50%),
    linear-gradient(180deg, var(--bg-deep) 0%, var(--bg) 40%, var(--bg-deep) 100%);
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

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

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

.shell {
  width: min(100% - var(--pad-x) * 2, var(--shell));
  margin-inline: auto;
}

/* atmosphere */
.noise {
  pointer-events: none;
  position: fixed;
  inset: 0;
  z-index: 80;
  opacity: 0.045;
  mix-blend-mode: soft-light;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
}

.orb {
  pointer-events: none;
  position: fixed;
  z-index: 0;
  border-radius: 50%;
  filter: blur(80px);
  opacity: 0.4;
  will-change: transform;
  transform: translate3d(var(--mx, 0px), calc(var(--my, 0px) + var(--sy, 0px)), 0);
  transition: transform 0.45s var(--ease);
}

.orb-a {
  width: 420px;
  height: 420px;
  top: 18vh;
  left: -120px;
  background: rgba(54, 200, 240, 0.22);
  animation: orb-pulse 10s ease-in-out infinite;
}

.orb-b {
  width: 360px;
  height: 360px;
  bottom: 10vh;
  right: -100px;
  background: rgba(228, 214, 188, 0.12);
  animation: orb-pulse 14s ease-in-out infinite reverse;
}

@keyframes orb-pulse {
  0%, 100% { opacity: 0.28; filter: blur(80px); }
  50% { opacity: 0.48; filter: blur(70px); }
}

/* nav */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 50;
  padding: 14px var(--pad-x) 0;
  transition: padding 0.35s var(--ease);
}

.nav.is-solid {
  padding-top: 8px;
}

.nav-inner {
  width: min(100%, var(--shell));
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  gap: 16px;
  padding: 10px 16px;
  border-radius: 999px;
  background: rgba(16, 22, 34, 0.62);
  border: 1px solid rgba(201, 184, 154, 0.16);
  backdrop-filter: blur(16px) saturate(1.2);
  box-shadow:
    0 0 0 1px rgba(54, 200, 240, 0.04),
    0 18px 50px rgba(0, 0, 0, 0.35);
  transition: background 0.35s var(--ease), border-color 0.35s var(--ease), box-shadow 0.35s var(--ease);
}

.nav.is-solid .nav-inner {
  background: rgba(10, 14, 22, 0.88);
  border-color: rgba(54, 200, 240, 0.22);
  box-shadow:
    0 0 0 1px rgba(54, 200, 240, 0.08),
    0 12px 36px rgba(0, 0, 0, 0.45);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  justify-self: start;
  text-decoration: none;
  transition: transform 0.25s var(--ease), filter 0.25s var(--ease);
}

.brand:hover {
  transform: translateY(-1px);
  filter: brightness(1.08);
}

.brand-logo {
  width: 36px;
  height: 36px;
  border-radius: 10px;
  object-fit: cover;
  flex: 0 0 auto;
  box-shadow:
    0 0 0 1px rgba(54, 200, 240, 0.22),
    0 6px 18px rgba(0, 0, 0, 0.45),
    0 0 22px rgba(54, 200, 240, 0.28);
}

.brand-wordmark {
  height: 26px;
  width: auto;
  max-width: 160px;
  object-fit: contain;
  object-position: left center;
  /* 字标底是黑底，叠在深色顶栏上用 screen 去掉黑底 */
  mix-blend-mode: screen;
  flex: 0 0 auto;
}

.brand-mark {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: radial-gradient(circle at 35% 35%, #7fe3ff, var(--accent) 55%, var(--accent-deep));
  box-shadow: 0 0 18px rgba(54, 200, 240, 0.55);
  animation: mark-glow 2.8s ease-in-out infinite;
}

@keyframes mark-glow {
  0%, 100% { box-shadow: 0 0 10px rgba(54, 200, 240, 0.35); transform: scale(1); }
  50% { box-shadow: 0 0 22px rgba(54, 200, 240, 0.75); transform: scale(1.15); }
}

.brand-text {
  font-family: var(--font-display);
  font-weight: 600;
  letter-spacing: 0.04em;
  font-size: 1.05rem;
}

.foot-brand {
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

.foot-logo {
  width: 26px;
  height: 26px;
  border-radius: 8px;
  object-fit: cover;
  box-shadow: 0 0 0 1px rgba(54, 200, 240, 0.18);
}

.foot-wordmark {
  height: 22px;
  width: auto;
  mix-blend-mode: screen;
  object-fit: contain;
}

.nav-links {
  display: flex;
  gap: 22px;
  justify-content: center;
  font-size: 0.92rem;
  color: var(--text-muted);
}

.nav-links a {
  position: relative;
  transition: color 0.25s var(--ease);
}

.nav-links a::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: -4px;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--gold-muted), transparent);
  transform: scaleX(0);
  transition: transform 0.3s var(--ease);
}

.nav-links a:hover {
  color: var(--text);
}

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

.btn-nav {
  justify-self: end;
}

/* buttons — soft accent fill, not neon solid */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 0 22px;
  border-radius: 999px;
  font-family: var(--font-body);
  font-weight: 500;
  font-size: 0.95rem;
  border: 1px solid transparent;
  transition: transform 0.25s var(--ease), background 0.25s var(--ease), border-color 0.25s var(--ease), box-shadow 0.25s var(--ease);
  cursor: pointer;
}

.btn:hover {
  transform: translateY(-1px);
}

.btn-primary {
  color: var(--text);
  background: color-mix(in srgb, var(--panel) 72%, var(--accent) 28%);
  border-color: rgba(54, 200, 240, 0.28);
  box-shadow: 0 0 28px rgba(54, 200, 240, 0.12);
}

.btn-primary:hover {
  background: color-mix(in srgb, var(--panel) 62%, var(--accent) 38%);
  box-shadow: 0 0 36px rgba(54, 200, 240, 0.18);
}

.btn-ghost {
  color: var(--gold);
  background: rgba(228, 214, 188, 0.06);
  border-color: rgba(201, 184, 154, 0.28);
}

.btn-ghost:hover {
  background: rgba(228, 214, 188, 0.12);
}

.btn-nav {
  min-height: 36px;
  padding: 0 16px;
  font-size: 0.88rem;
  color: var(--text);
  background: color-mix(in srgb, var(--panel) 75%, var(--accent) 25%);
  border-color: rgba(54, 200, 240, 0.22);
}

/* hero：大屏勿撑满整屏再贴底，否则上方会空一大截 */
.hero {
  position: relative;
  min-height: clamp(560px, 78vh, 780px);
  display: grid;
  align-items: center;
  padding: 108px 0 56px;
  isolation: isolate;
}

@media (min-width: 1400px) {
  .hero {
    min-height: clamp(560px, 68vh, 720px);
    padding: 96px 0 48px;
  }
}

.hero-media {
  position: absolute;
  inset: 0;
  z-index: -1;
  overflow: hidden;
}

.hero-media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center 42%;
  transform: scale(1.04);
  filter: saturate(1.05) contrast(1.04);
  will-change: transform, opacity;
  transition: opacity 0.2s linear;
}

.hero-veil {
  position: absolute;
  inset: 0;
  background:
    linear-gradient(90deg, rgba(10, 14, 22, 0.92) 0%, rgba(10, 14, 22, 0.72) 42%, rgba(10, 14, 22, 0.28) 72%, rgba(10, 14, 22, 0.55) 100%),
    linear-gradient(180deg, rgba(10, 14, 22, 0.55) 0%, transparent 28%, rgba(10, 14, 22, 0.35) 62%, rgba(10, 14, 22, 0.92) 100%);
}

.hero-copy {
  position: relative;
  max-width: 640px;
  padding-bottom: 8px;
}

.eyebrow {
  margin: 0 0 14px;
  font-family: var(--font-display);
  font-size: 0.78rem;
  font-weight: 500;
  letter-spacing: 0.22em;
  color: var(--accent);
  text-transform: uppercase;
}

.hero .eyebrow.is-in {
  animation: eyebrow-in 1.1s var(--ease) both;
}

@keyframes eyebrow-in {
  from { letter-spacing: 0.08em; opacity: 0; }
  to { letter-spacing: 0.22em; opacity: 1; }
}

.hero h1 {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(3.4rem, 8vw, 6.2rem);
  line-height: 1.02;
  letter-spacing: 0.02em;
  color: #f0ebe1;
  text-shadow: 0 12px 48px rgba(0, 0, 0, 0.45);
  background: linear-gradient(105deg, #f0ebe1 0%, #f0ebe1 40%, var(--accent) 50%, #f0ebe1 60%, #f0ebe1 100%);
  background-size: 220% 100%;
  -webkit-background-clip: text;
  background-clip: text;
}

.hero h1.is-in {
  animation: title-sheen 4.5s ease-in-out 0.6s infinite;
  color: transparent;
}

@keyframes title-sheen {
  0%, 70%, 100% { background-position: 100% 50%; }
  40% { background-position: 0% 50%; }
}

.lede {
  margin: 22px 0 0;
  font-size: clamp(1.15rem, 2vw, 1.4rem);
  font-weight: 500;
  color: var(--gold);
  max-width: 28ch;
}

.support {
  margin: 14px 0 0;
  color: var(--text-muted);
  max-width: 38ch;
  font-size: 1rem;
}

.hero-cta {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 22px;
}

/* 首屏免费承诺 — 打开即见 */
.promise {
  margin-top: 26px;
  max-width: 420px;
  padding: 18px 20px 16px;
  border-radius: 16px;
  background:
    linear-gradient(135deg, rgba(54, 200, 240, 0.1), rgba(20, 28, 40, 0.88) 42%, rgba(228, 214, 188, 0.08));
  border: 1px solid rgba(54, 200, 240, 0.28);
  box-shadow:
    0 0 0 1px rgba(228, 214, 188, 0.06),
    0 20px 48px rgba(0, 0, 0, 0.35),
    0 0 40px rgba(54, 200, 240, 0.1);
  backdrop-filter: blur(12px);
  animation: promise-breathe 5s ease-in-out infinite;
}

@keyframes promise-breathe {
  0%, 100% {
    box-shadow:
      0 0 0 1px rgba(228, 214, 188, 0.06),
      0 20px 48px rgba(0, 0, 0, 0.35),
      0 0 28px rgba(54, 200, 240, 0.08);
    border-color: rgba(54, 200, 240, 0.24);
  }
  50% {
    box-shadow:
      0 0 0 1px rgba(228, 214, 188, 0.1),
      0 24px 56px rgba(0, 0, 0, 0.4),
      0 0 52px rgba(54, 200, 240, 0.22);
    border-color: rgba(54, 200, 240, 0.42);
  }
}

.promise-kicker {
  margin: 0 0 6px;
  font-family: var(--font-display);
  font-size: 0.72rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--accent);
}

.promise-title {
  margin: 0 0 12px;
  font-family: var(--font-display);
  font-size: clamp(1.35rem, 2.4vw, 1.65rem);
  font-weight: 600;
  line-height: 1.25;
  color: #f0ebe1;
}

.promise-title strong {
  color: var(--gold);
  font-weight: 700;
}

.promise-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 8px;
}

.promise-list li {
  position: relative;
  padding-left: 16px;
  font-size: 0.95rem;
  color: var(--text);
  line-height: 1.45;
}

.promise-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.55em;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: color-mix(in srgb, var(--panel) 35%, var(--accent) 65%);
  box-shadow: 0 0 10px rgba(54, 200, 240, 0.4);
}

.promise-list span,
.promise-list strong {
  color: var(--gold);
  font-weight: 600;
}

.promise-more {
  display: inline-block;
  margin-top: 12px;
  font-size: 0.86rem;
  color: var(--accent);
  border-bottom: 1px solid rgba(54, 200, 240, 0.35);
  transition: color 0.2s var(--ease), border-color 0.2s var(--ease);
}

.promise-more:hover {
  color: #7fe3ff;
  border-color: rgba(127, 227, 255, 0.55);
}

/* 免费专题（首屏下方立刻展开） */
.free-detail {
  position: relative;
  padding: clamp(56px, 9vh, 88px) 0;
  background:
    linear-gradient(180deg, rgba(10, 14, 22, 0.2), rgba(21, 32, 51, 0.55) 40%, rgba(10, 14, 22, 0.15));
}

.free-detail::before {
  content: "";
  position: absolute;
  left: 50%;
  top: 0;
  width: min(100% - var(--pad-x) * 2, var(--shell));
  height: 1px;
  transform: translateX(-50%);
  background: linear-gradient(90deg, transparent, rgba(54, 200, 240, 0.4), rgba(228, 214, 188, 0.3), transparent);
}

.free-detail-inner {
  text-align: center;
  max-width: 920px;
}

.free-detail h2 {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: clamp(2rem, 4vw, 2.8rem);
  line-height: 1.2;
  color: #f0ebe1;
}

.free-detail .body {
  margin: 16px auto 0;
  max-width: 46ch;
}

.free-grid {
  margin-top: 36px;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
  text-align: left;
}

.free-grid article {
  padding: 22px 20px;
  border-radius: 16px;
  background: color-mix(in srgb, var(--panel) 78%, var(--accent) 22%);
  border: 1px solid rgba(54, 200, 240, 0.18);
  box-shadow: 0 16px 40px rgba(0, 0, 0, 0.22);
  transition: transform 0.4s var(--ease), border-color 0.4s var(--ease), box-shadow 0.4s var(--ease);
}

.free-grid article:hover {
  transform: translateY(-4px);
  border-color: rgba(54, 200, 240, 0.35);
  box-shadow: 0 22px 48px rgba(0, 0, 0, 0.32), 0 0 28px rgba(54, 200, 240, 0.1);
}

.free-grid h3 {
  margin: 0 0 8px;
  font-family: var(--font-display);
  font-size: 1.15rem;
  font-weight: 600;
  color: var(--gold);
}

.free-grid p {
  margin: 0;
  font-size: 0.94rem;
  color: var(--text-muted);
  line-height: 1.55;
}

/* 轻量优势：有数、不点名 */
.light-proof {
  margin-top: 36px;
  display: grid;
  grid-template-columns: minmax(140px, 220px) 1fr;
  gap: 28px;
  align-items: center;
  text-align: left;
  padding: 28px 28px 26px;
  border-radius: 18px;
  background:
    linear-gradient(120deg, rgba(54, 200, 240, 0.12), rgba(20, 28, 40, 0.92) 45%, rgba(228, 214, 188, 0.08));
  border: 1px solid rgba(54, 200, 240, 0.26);
  box-shadow:
    0 0 0 1px rgba(228, 214, 188, 0.05),
    0 24px 56px rgba(0, 0, 0, 0.28);
}

.light-num {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 6px;
  font-family: var(--font-display);
  line-height: 1;
}

.light-num strong {
  font-size: clamp(2.4rem, 5vw, 3.2rem);
  font-weight: 700;
  letter-spacing: 0.04em;
  background: linear-gradient(180deg, #f2ebe0, var(--gold-muted));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  filter: drop-shadow(0 0 24px rgba(54, 200, 240, 0.2));
}

.light-unit {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--accent);
  letter-spacing: 0.18em;
  text-transform: uppercase;
}

.light-copy h3 {
  margin: 0 0 10px;
  font-family: var(--font-display);
  font-size: clamp(1.2rem, 2.2vw, 1.45rem);
  font-weight: 600;
  color: #f0ebe1;
}

.light-copy p {
  margin: 0;
  font-size: 0.98rem;
  color: var(--text-muted);
  line-height: 1.6;
  max-width: 48ch;
}

.light-note {
  margin-top: 10px !important;
  font-size: 0.84rem !important;
  color: rgba(184, 168, 144, 0.85) !important;
}

.hero-meter {
  position: absolute;
  right: var(--pad-x);
  bottom: 88px;
  display: flex;
  align-items: flex-end;
  gap: 5px;
  height: 54px;
  opacity: 0.55;
}

.hero-meter span {
  width: 4px;
  border-radius: 999px;
  background: linear-gradient(180deg, var(--accent), rgba(54, 200, 240, 0.15));
  animation: meter 1.2s ease-in-out infinite;
}

.hero-meter span:nth-child(1) { height: 28%; animation-delay: 0s; }
.hero-meter span:nth-child(2) { height: 52%; animation-delay: 0.08s; }
.hero-meter span:nth-child(3) { height: 40%; animation-delay: 0.16s; }
.hero-meter span:nth-child(4) { height: 78%; animation-delay: 0.04s; }
.hero-meter span:nth-child(5) { height: 60%; animation-delay: 0.2s; }
.hero-meter span:nth-child(6) { height: 90%; animation-delay: 0.12s; }
.hero-meter span:nth-child(7) { height: 46%; animation-delay: 0.24s; }
.hero-meter span:nth-child(8) { height: 34%; animation-delay: 0.1s; }

@keyframes meter {
  0%, 100% { transform: scaleY(0.45); opacity: 0.45; }
  50% { transform: scaleY(1); opacity: 1; }
}

.scroll-cue {
  position: absolute;
  left: 50%;
  bottom: 28px;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 10px;
  color: var(--text-muted);
  z-index: 2;
  transition: opacity 0.45s var(--ease), transform 0.45s var(--ease);
}

.scroll-cue.is-gone {
  opacity: 0;
  pointer-events: none;
  transform: translateX(-50%) translateY(12px);
}

.scroll-cue-line {
  width: 1px;
  height: 36px;
  background: linear-gradient(180deg, var(--accent), transparent);
  animation: cue-fall 1.8s ease-in-out infinite;
  transform-origin: top;
}

.scroll-cue-text {
  font-size: 0.72rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  font-family: var(--font-display);
}

@keyframes cue-fall {
  0% { transform: scaleY(0.35); opacity: 0; }
  40% { opacity: 1; }
  100% { transform: scaleY(1); opacity: 0; }
}

/* edge — 差异化一览 */
.edge {
  position: relative;
  padding: clamp(64px, 10vh, 100px) 0;
  text-align: center;
}

.edge::before {
  content: "";
  position: absolute;
  left: 50%;
  top: 0;
  width: min(100% - var(--pad-x) * 2, var(--shell));
  height: 1px;
  transform: translateX(-50%);
  background: linear-gradient(90deg, transparent, rgba(201, 184, 154, 0.28), rgba(54, 200, 240, 0.35), rgba(201, 184, 154, 0.28), transparent);
}

.edge h2 {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: clamp(2rem, 4vw, 2.8rem);
  line-height: 1.2;
  color: #f0ebe1;
}

.edge .body {
  margin: 16px auto 0;
  max-width: 46ch;
}

.edge-grid {
  margin-top: 36px;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 14px;
  text-align: left;
}

.edge-grid article {
  padding: 20px 18px;
  border-radius: 16px;
  background: color-mix(in srgb, var(--panel) 82%, var(--accent) 18%);
  border: 1px solid rgba(201, 184, 154, 0.16);
  box-shadow: 0 14px 36px rgba(0, 0, 0, 0.2);
  transition: transform 0.4s var(--ease), border-color 0.4s var(--ease), box-shadow 0.4s var(--ease);
}

.edge-grid article:hover {
  transform: translateY(-3px);
  border-color: rgba(54, 200, 240, 0.32);
  box-shadow: 0 20px 44px rgba(0, 0, 0, 0.3), 0 0 24px rgba(54, 200, 240, 0.08);
}

.edge-grid h3 {
  margin: 0 0 8px;
  font-family: var(--font-display);
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--gold);
}

.edge-grid p {
  margin: 0;
  font-size: 0.9rem;
  color: var(--text-muted);
  line-height: 1.55;
}

/* features — 12-col feel via 5/7 split */
.feature {
  position: relative;
  padding: clamp(72px, 12vh, 120px) 0;
}

.feature::before {
  content: "";
  position: absolute;
  left: 50%;
  top: 0;
  width: min(100% - var(--pad-x) * 2, var(--shell));
  height: 1px;
  transform: translateX(-50%);
  background: linear-gradient(90deg, transparent, rgba(201, 184, 154, 0.28), rgba(54, 200, 240, 0.35), rgba(201, 184, 154, 0.28), transparent);
}

.feature-grid {
  display: grid;
  grid-template-columns: repeat(12, 1fr);
  gap: var(--gutter);
  align-items: center;
}

.feature-copy {
  grid-column: 1 / span 5;
}

.feature-flip .feature-copy {
  grid-column: 8 / span 5;
  order: 2;
}

.shot {
  grid-column: 6 / span 7;
  margin: 0;
  position: relative;
}

.feature-flip .shot {
  grid-column: 1 / span 7;
  order: 1;
}

.feature h2 {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: clamp(2rem, 4vw, 3rem);
  line-height: 1.15;
  letter-spacing: 0.01em;
  color: #efe8dc;
}

.gold {
  color: var(--gold);
  font-weight: 500;
}

.body {
  margin: 18px 0 0;
  color: var(--text-muted);
  font-size: 1.02rem;
  max-width: 38ch;
}

.ticks {
  list-style: none;
  margin: 28px 0 0;
  padding: 0;
  display: grid;
  gap: 12px;
}

.ticks li {
  position: relative;
  padding-left: 22px;
  color: var(--text);
  font-size: 0.98rem;
}

.ticks li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.55em;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: color-mix(in srgb, var(--panel) 40%, var(--accent) 60%);
  box-shadow: 0 0 12px rgba(54, 200, 240, 0.35);
}

.shot {
  --tilt-x: 0deg;
  --tilt-y: 0deg;
  --glow-x: 50%;
  --glow-y: 40%;
  border-radius: 18px;
  overflow: hidden;
  border: 1px solid rgba(201, 184, 154, 0.18);
  background: var(--panel);
  box-shadow:
    0 0 0 1px rgba(54, 200, 240, 0.05),
    0 30px 80px rgba(0, 0, 0, 0.45),
    0 0 60px rgba(54, 200, 240, 0.06);
  transform: perspective(1200px) rotateX(var(--tilt-x)) rotateY(var(--tilt-y));
  transition: transform 0.35s var(--ease), box-shadow 0.35s var(--ease);
  transform-style: preserve-3d;
}

.shot:hover {
  box-shadow:
    0 0 0 1px rgba(54, 200, 240, 0.12),
    0 36px 90px rgba(0, 0, 0, 0.5),
    0 0 70px rgba(54, 200, 240, 0.12);
}

.shot::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background:
    radial-gradient(500px 280px at var(--glow-x) var(--glow-y), rgba(54, 200, 240, 0.16), transparent 55%),
    linear-gradient(135deg, rgba(54, 200, 240, 0.08), transparent 40%, rgba(228, 214, 188, 0.05));
  mix-blend-mode: screen;
  transition: opacity 0.35s var(--ease);
}

.shot img {
  width: 100%;
  aspect-ratio: 16 / 10;
  object-fit: cover;
  object-position: center top;
  transition: transform 0.45s var(--ease);
}

.shot figcaption {
  position: absolute;
  left: 16px;
  bottom: 14px;
  z-index: 1;
  padding: 6px 12px;
  border-radius: 999px;
  font-size: 0.78rem;
  color: var(--gold);
  background: rgba(10, 14, 22, 0.72);
  border: 1px solid rgba(201, 184, 154, 0.22);
  backdrop-filter: blur(8px);
}

/* 迷你悬浮条截图：接近方图，完整展示勿裁切 */
.shot-mini {
  background:
    radial-gradient(380px 220px at 50% 35%, rgba(54, 200, 240, 0.12), transparent 62%),
    linear-gradient(165deg, #101826 0%, #0a1018 100%);
}

.shot-mini img {
  aspect-ratio: 1 / 1;
  object-fit: contain;
  object-position: center;
  padding: 18px 22px 42px;
  box-sizing: border-box;
}

/* stacked preview — 软件闪避双图 */
.shot-stack {
  --stack-pad: 8%;
  aspect-ratio: 16 / 11;
  overflow: visible !important;
  background:
    radial-gradient(420px 240px at 70% 30%, rgba(54, 200, 240, 0.12), transparent 60%),
    linear-gradient(160deg, #101826 0%, #0c121c 100%);
  border: 1px solid rgba(54, 200, 240, 0.16);
  /* 取消单图 tilt，避免叠层发飘 */
  transform: none !important;
}

.shot-stack::after {
  border-radius: 18px;
}

.shot-stack .stack-card {
  position: absolute;
  margin: 0;
  padding: 0;
  border: 1px solid rgba(201, 184, 154, 0.2);
  border-radius: 14px;
  overflow: hidden;
  background: #0a1018;
  cursor: pointer;
  box-shadow:
    0 18px 40px rgba(0, 0, 0, 0.45),
    0 0 0 1px rgba(54, 200, 240, 0.06);
  transition:
    transform 0.45s var(--ease),
    box-shadow 0.45s var(--ease),
    border-color 0.35s var(--ease),
    z-index 0s;
  outline: none;
}

.shot-stack .stack-card img {
  display: block;
  width: 100%;
  height: 100%;
  aspect-ratio: auto;
  object-fit: cover;
  object-position: center top;
  pointer-events: none;
  transform: none;
}

.shot-stack .stack-card:nth-child(1) {
  z-index: 2;
  width: 78%;
  left: 4%;
  top: 10%;
  transform: rotate(-3.2deg) translate3d(0, 0, 0);
}

.shot-stack .stack-card:nth-child(2) {
  z-index: 1;
  width: 76%;
  right: 3%;
  bottom: 8%;
  left: auto;
  top: auto;
  transform: rotate(4deg) translate3d(0, 0, 0);
}

.shot-stack .stack-card.is-front {
  z-index: 4;
  border-color: rgba(54, 200, 240, 0.42);
  box-shadow:
    0 28px 60px rgba(0, 0, 0, 0.55),
    0 0 0 1px rgba(54, 200, 240, 0.18),
    0 0 36px rgba(54, 200, 240, 0.14);
}

.shot-stack .stack-card:nth-child(1).is-front {
  transform: rotate(-1.2deg) translate3d(0, -6px, 0) scale(1.03);
}

.shot-stack .stack-card:nth-child(2).is-front {
  transform: rotate(1.6deg) translate3d(0, -8px, 0) scale(1.04);
}

.shot-stack .stack-card:focus-visible {
  border-color: rgba(54, 200, 240, 0.55);
}

.shot-stack:hover {
  box-shadow:
    0 0 0 1px rgba(54, 200, 240, 0.12),
    0 36px 90px rgba(0, 0, 0, 0.5),
    0 0 70px rgba(54, 200, 240, 0.1);
}

.shot-stack figcaption {
  z-index: 6;
  left: 50%;
  bottom: -6px;
  transform: translateX(-50%);
  white-space: nowrap;
}

@media (max-width: 960px) {
  .shot-stack {
    aspect-ratio: 16 / 12;
    margin-bottom: 12px;
  }

  .shot-stack .stack-card:nth-child(1),
  .shot-stack .stack-card:nth-child(2) {
    width: 82%;
  }
}

@media (max-width: 560px) {
  .shot-stack .stack-card:nth-child(1) {
    transform: rotate(-2deg);
  }

  .shot-stack .stack-card:nth-child(2) {
    transform: rotate(2.4deg);
  }

  .shot-stack .stack-card:nth-child(1).is-front {
    transform: rotate(-0.8deg) translate3d(0, -4px, 0) scale(1.02);
  }

  .shot-stack .stack-card:nth-child(2).is-front {
    transform: rotate(1deg) translate3d(0, -4px, 0) scale(1.02);
  }
}

/* closer */
.closer {
  padding: clamp(80px, 14vh, 140px) 0 90px;
  position: relative;
}

.closer::before {
  content: "";
  position: absolute;
  inset: 10% 10% auto;
  height: 280px;
  background: radial-gradient(ellipse at center, rgba(54, 200, 240, 0.12), transparent 70%);
  pointer-events: none;
}

.closer-inner {
  position: relative;
  text-align: center;
  max-width: 720px;
}

.closer h2 {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: clamp(2.2rem, 5vw, 3.4rem);
  line-height: 1.15;
  color: #f0ebe1;
}

.closer .body {
  margin-inline: auto;
  max-width: 40ch;
}

.closer-cta {
  margin-top: 28px;
  display: grid;
  justify-items: center;
  gap: 12px;
}

.hint {
  margin: 0;
  font-size: 0.85rem;
  color: var(--text-muted);
}

.mini-points {
  list-style: none;
  margin: 48px 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 18px;
  text-align: left;
}

.mini-points li {
  padding: 18px 16px;
  border-radius: 14px;
  background: color-mix(in srgb, var(--panel) 88%, var(--accent) 12%);
  border: 1px solid rgba(201, 184, 154, 0.14);
  transition: transform 0.35s var(--ease), border-color 0.35s var(--ease);
}

.mini-points li:hover {
  transform: translateY(-3px);
  border-color: rgba(54, 200, 240, 0.3);
}

.mini-points strong {
  display: block;
  font-family: var(--font-display);
  font-weight: 600;
  margin-bottom: 6px;
  color: var(--gold);
}

.mini-points span {
  display: block;
  font-size: 0.9rem;
  color: var(--text-muted);
  line-height: 1.5;
}

/* back to top */
.to-top {
  position: fixed;
  right: max(18px, env(safe-area-inset-right, 0px));
  bottom: max(22px, env(safe-area-inset-bottom, 0px));
  z-index: 80;
  display: inline-flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 4px;
  min-width: 52px;
  min-height: 52px;
  padding: 10px 12px 8px;
  border: 1px solid rgba(54, 200, 240, 0.28);
  border-radius: 16px;
  background: color-mix(in srgb, var(--panel) 72%, var(--accent) 28%);
  color: var(--gold);
  cursor: pointer;
  box-shadow:
    0 12px 32px rgba(0, 0, 0, 0.35),
    0 0 24px rgba(54, 200, 240, 0.08);
  opacity: 0;
  visibility: hidden;
  transform: translateY(10px);
  transition:
    opacity 0.3s var(--ease),
    visibility 0.3s var(--ease),
    transform 0.3s var(--ease),
    background 0.25s var(--ease),
    border-color 0.25s var(--ease);
}

.to-top.is-show {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.to-top:hover {
  background: color-mix(in srgb, var(--panel) 62%, var(--accent) 38%);
  border-color: rgba(54, 200, 240, 0.42);
  transform: translateY(-2px);
}

.to-top-arrow {
  display: block;
  width: 10px;
  height: 10px;
  border-left: 2px solid var(--gold);
  border-top: 2px solid var(--gold);
  transform: rotate(45deg);
  margin-top: 4px;
}

.to-top-label {
  font-family: var(--font-body);
  font-size: 0.72rem;
  font-weight: 500;
  letter-spacing: 0.06em;
  line-height: 1;
  color: var(--text);
}

@media (max-width: 560px) {
  .to-top {
    right: 14px;
    bottom: 16px;
    min-width: 48px;
    min-height: 48px;
    padding: 8px 10px 6px;
  }
}

/* footer */
.foot {
  padding: 28px var(--pad-x) 36px;
  border-top: 1px solid rgba(201, 184, 154, 0.12);
}

.foot-inner {
  display: flex;
  flex-wrap: wrap;
  gap: 12px 24px;
  align-items: center;
  justify-content: space-between;
}

.foot-meta {
  color: var(--text-muted);
  font-size: 0.86rem;
}

/* reveal */
.reveal {
  opacity: 0;
  filter: blur(8px);
  transform: translate3d(0, 28px, 0) scale(0.98);
  transition:
    opacity 0.95s var(--ease),
    transform 0.95s var(--ease),
    filter 0.95s var(--ease);
  transition-delay: var(--d, 0s);
}

.reveal.is-in {
  opacity: 1;
  filter: blur(0);
  transform: none;
}

.rise-card {
  opacity: 0;
  transform: translate3d(0, 24px, 0);
  transition: opacity 0.7s var(--ease), transform 0.7s var(--ease);
  transition-delay: var(--stagger, 0s);
}

.rise-card.is-in {
  opacity: 1;
  transform: none;
}

.delay-1 { --d: 0.1s; }
.delay-2 { --d: 0.2s; }
.delay-3 { --d: 0.32s; }
.delay-4 { --d: 0.42s; }

.btn-primary {
  position: relative;
  overflow: hidden;
}

.btn-primary::after {
  content: "";
  position: absolute;
  inset: -40% auto -40% -60%;
  width: 40%;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.12), transparent);
  transform: translateX(0) skewX(-18deg);
  animation: btn-sheen 3.8s ease-in-out infinite;
}

@keyframes btn-sheen {
  0%, 55%, 100% { transform: translateX(0) skewX(-18deg); opacity: 0; }
  70% { opacity: 1; }
  90% { transform: translateX(420%) skewX(-18deg); opacity: 0; }
}

.light-proof {
  animation: promise-breathe 6s ease-in-out infinite;
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .reveal,
  .rise-card,
  .hero-media img,
  .orb,
  .hero-meter span,
  .shot img,
  .brand-mark,
  .brand-logo,
  .promise,
  .light-proof,
  .scroll-cue-line,
  .btn-primary::after,
  .hero h1 {
    animation: none !important;
    transition: none !important;
    opacity: 1 !important;
    filter: none !important;
    transform: none !important;
    color: #f0ebe1 !important;
    background: none !important;
    -webkit-background-clip: border-box !important;
    background-clip: border-box !important;
  }
}

/* tablet */
@media (max-width: 960px) {
  .nav-inner {
    grid-template-columns: 1fr auto;
  }

  .nav-links {
    display: none;
  }

  .feature-grid {
    grid-template-columns: 1fr;
    gap: 28px;
  }

  .feature-copy,
  .feature-flip .feature-copy,
  .shot,
  .feature-flip .shot {
    grid-column: 1 / -1;
    order: initial;
  }

  .feature-flip .feature-copy {
    order: 0;
  }

  .feature-flip .shot {
    order: 1;
  }

  .hero-meter,
  .scroll-cue {
    display: none;
  }

  .mini-points {
    grid-template-columns: 1fr;
  }

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

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

  .light-proof {
    grid-template-columns: 1fr;
    gap: 16px;
    text-align: center;
  }

  .light-copy p {
    max-width: none;
    margin-inline: auto;
  }

  .shot {
    transform: none;
  }
}

/* phone */
@media (max-width: 560px) {
  .edge-grid {
    grid-template-columns: 1fr;
  }

  .hero {
    min-height: clamp(520px, 88vh, 720px);
    padding-top: 96px;
    padding-bottom: 48px;
    align-items: center;
  }

  .hero h1 {
    font-size: clamp(2.8rem, 14vw, 3.6rem);
  }

  .support {
    display: none;
  }

  .promise {
    max-width: none;
  }

  .hero-cta {
    width: 100%;
  }

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

  .shot figcaption {
    font-size: 0.72rem;
  }
}