/* =========================================================
   NovaLauncher — 旗舰级产品站视觉
   纯黑 · 低饱和 · 纤细排版 · 液态毛玻璃 · 极光微光
   ========================================================= */

/* ---------- 1. 变量 ---------- */
:root {
  --bg: #000000;
  --ink: #f4f5f7;
  --ink-2: #b7bbc4;
  --ink-3: #83889a;
  --ink-4: #565b66;

  --line: rgba(255, 255, 255, 0.07);
  --line-2: rgba(255, 255, 255, 0.13);
  --line-3: rgba(255, 255, 255, 0.2);
  --fill: rgba(255, 255, 255, 0.016);
  --fill-2: rgba(255, 255, 255, 0.04);

  --aurora: 127, 166, 255;
  --r: 16px;
  --r-lg: 24px;

  --shadow-win:
    0 1px 1px rgba(0, 0, 0, 0.8),
    0 10px 24px -14px rgba(0, 0, 0, 0.9),
    0 40px 90px -40px rgba(0, 0, 0, 1),
    0 90px 160px -70px rgba(0, 0, 0, 1),
    0 0 180px -60px rgba(var(--aurora), 0.55);

  --ease: cubic-bezier(0.16, 1, 0.3, 1);
  --nav-h: 76px;

  --font: "MiSans", "Noto Sans SC", "PingFang SC", "Microsoft YaHei UI",
    "Microsoft YaHei", "HarmonyOS Sans SC", system-ui, -apple-system, sans-serif;
  --font-display: "MiSans", "Noto Sans SC", "PingFang SC",
    "Microsoft YaHei Light", "HarmonyOS Sans SC", system-ui, sans-serif;
  --mono: ui-monospace, SFMono-Regular, "JetBrains Mono", Consolas, monospace;
}

/* ---------- 2. 基础 ---------- */
*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--nav-h) + 24px);
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  font-family: var(--font);
  font-size: 15.5px;
  line-height: 1.7;
  color: var(--ink);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
}

/* 深处的极光：极淡，缓慢弥散 */
body::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: -2;
  pointer-events: none;
  background:
    radial-gradient(58rem 42rem at 76% -12%, rgba(var(--aurora), 0.16), transparent 62%),
    radial-gradient(46rem 34rem at 14% 4%, rgba(var(--aurora), 0.08), transparent 68%),
    #000;
}

/* 精致网格暗纹 + 极轻噪点，哑光质感 */
body::after {
  content: "";
  position: fixed;
  inset: 0;
  z-index: -1;
  pointer-events: none;
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.028) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.028) 1px, transparent 1px),
    url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='180' height='180'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.85' numOctaves='3' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='180' height='180' filter='url(%23n)' opacity='.055'/%3E%3C/svg%3E");
  background-size: 96px 96px, 96px 96px, 180px 180px;
  opacity: 1;
  mask-image: radial-gradient(ellipse 100% 72% at 50% 0%, #000 18%, transparent 82%);
  -webkit-mask-image: radial-gradient(ellipse 100% 72% at 50% 0%, #000 18%, transparent 82%);
}

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

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

button {
  font: inherit;
  color: inherit;
  cursor: pointer;
  border: 0;
  background: none;
}

code {
  padding: 1px 6px;
  border: 1px solid var(--line);
  border-radius: 5px;
  background: var(--fill-2);
  font-family: var(--mono);
  font-size: 0.86em;
  color: #c7cdda;
}

h1,
h2,
h3,
h4 {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 300;
  letter-spacing: -0.03em;
  line-height: 1.18;
}

p {
  margin: 0;
  text-wrap: pretty;
}

ul,
ol {
  margin: 0;
  padding: 0;
  list-style: none;
}

::selection {
  background: rgba(var(--aurora), 0.3);
  color: #fff;
}

:focus-visible {
  outline: 1px solid rgba(var(--aurora), 0.9);
  outline-offset: 4px;
  border-radius: 4px;
}

/* ---------- 3. 组件 ---------- */
.wrap {
  width: min(1200px, 100% - 56px);
  margin-inline: auto;
}

.wrap--narrow {
  width: min(800px, 100% - 56px);
}

.skip-link {
  position: absolute;
  left: 16px;
  top: -80px;
  z-index: 200;
  padding: 10px 16px;
  border-radius: 8px;
  background: #fff;
  color: #000;
  font-weight: 500;
  transition: top 0.2s;
}

.skip-link:focus {
  top: 16px;
}

.btn {
  --py: 12px;
  --px: 22px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: var(--py) var(--px);
  border-radius: 999px;
  font-size: 0.92rem;
  font-weight: 450;
  letter-spacing: 0.01em;
  white-space: nowrap;
  transition: background 0.3s, border-color 0.3s, color 0.3s, transform 0.3s var(--ease),
    box-shadow 0.3s;
}

.btn svg {
  width: 16px;
  height: 16px;
  flex: none;
  opacity: 0.85;
}

.btn--sm {
  --py: 9px;
  --px: 18px;
  font-size: 0.85rem;
}

.btn--lg {
  --py: 15px;
  --px: 30px;
  font-size: 0.98rem;
}

.btn--primary {
  background: #f2f3f5;
  color: #08090b;
  box-shadow: 0 1px 0 rgba(255, 255, 255, 0.6) inset, 0 12px 30px -18px rgba(255, 255, 255, 0.55);
}

.btn--primary:hover {
  background: #ffffff;
  transform: translateY(-1px);
  box-shadow: 0 1px 0 rgba(255, 255, 255, 0.8) inset, 0 18px 38px -18px rgba(255, 255, 255, 0.4);
}

.btn--outline,
.btn--ghost {
  border: 1px solid var(--line-2);
  background: rgba(255, 255, 255, 0.018);
  color: var(--ink);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
}

.btn--outline:hover,
.btn--ghost:hover {
  border-color: var(--line-3);
  background: rgba(255, 255, 255, 0.06);
  transform: translateY(-1px);
}

.btn--block {
  width: 100%;
}

.pill {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  padding: 5px 13px 5px 11px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.02);
  font-size: 0.76rem;
  letter-spacing: 0.04em;
  color: var(--ink-3);
}

.pill__dot {
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: rgba(var(--aurora), 0.9);
  box-shadow: 0 0 10px 1px rgba(var(--aurora), 0.6);
  animation: pulse 3.4s ease-in-out infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 0.55; }
  50% { opacity: 1; }
}

.eyebrow {
  margin-bottom: 18px;
  font-size: 0.72rem;
  font-weight: 450;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--ink-4);
}

.eyebrow::before {
  content: "";
  display: inline-block;
  width: 20px;
  height: 1px;
  margin-right: 12px;
  vertical-align: middle;
  background: linear-gradient(90deg, rgba(var(--aurora), 0.7), transparent);
}

/* ---------- 4. 导航 ---------- */
.nav {
  position: fixed;
  inset: 0 0 auto;
  z-index: 100;
  height: var(--nav-h);
  display: flex;
  align-items: center;
  border-bottom: 1px solid transparent;
  transition: background 0.45s, border-color 0.45s, backdrop-filter 0.45s;
}

.nav.is-scrolled {
  background: rgba(0, 0, 0, 0.55);
  backdrop-filter: blur(20px) saturate(120%);
  -webkit-backdrop-filter: blur(20px) saturate(120%);
  border-bottom-color: var(--line);
}

.nav__inner {
  display: flex;
  align-items: center;
  gap: 32px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 11px;
  flex: none;
}

.brand__mark {
  display: grid;
  place-items: center;
  width: 30px;
  height: 30px;
  border-radius: 9px;
  color: #0a0b0e;
  background: linear-gradient(150deg, #dfe8ff, #9db4e8);
  box-shadow: 0 0 0 1px rgba(255, 255, 255, 0.12), 0 8px 24px -10px rgba(var(--aurora), 0.8);
}

.brand__mark svg {
  width: 17px;
  height: 17px;
}

.brand__text {
  display: flex;
  align-items: baseline;
  gap: 8px;
  font-size: 0.98rem;
  font-weight: 500;
  letter-spacing: -0.01em;
}

.brand__text em {
  font-style: normal;
  font-size: 0.7rem;
  font-weight: 300;
  letter-spacing: 0.05em;
  color: var(--ink-4);
}

.nav__links {
  display: flex;
  gap: 2px;
  margin-inline: auto;
}

.nav__links a {
  padding: 7px 14px;
  border-radius: 999px;
  font-size: 0.87rem;
  color: var(--ink-3);
  transition: color 0.25s, background 0.25s;
}

.nav__links a:hover {
  color: var(--ink);
  background: rgba(255, 255, 255, 0.04);
}

.nav__actions {
  display: flex;
  align-items: center;
  gap: 10px;
  flex: none;
}

.nav__actions .btn--ghost {
  border-color: transparent;
  background: none;
  color: var(--ink-3);
}

.nav__actions .btn--ghost:hover {
  color: var(--ink);
  background: rgba(255, 255, 255, 0.04);
}

.nav__burger {
  display: none;
  width: 38px;
  height: 38px;
  border-radius: 9px;
  border: 1px solid var(--line);
  place-items: center;
  gap: 4px;
}

.nav__burger span {
  display: block;
  width: 15px;
  height: 1.2px;
  border-radius: 2px;
  background: var(--ink-2);
  transition: transform 0.3s var(--ease), opacity 0.2s;
}

.nav__burger[aria-expanded="true"] span:nth-child(1) { transform: translateY(5.2px) rotate(45deg); }
.nav__burger[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
.nav__burger[aria-expanded="true"] span:nth-child(3) { transform: translateY(-5.2px) rotate(-45deg); }

/* ---------- 5. 首屏 ---------- */
.hero {
  position: relative;
  padding-top: calc(var(--nav-h) + 96px);
  padding-bottom: 48px;
  overflow: hidden;
}

.hero__bg {
  position: absolute;
  inset: -20% -15% auto;
  height: 130%;
  pointer-events: none;
  z-index: 0;
  background:
    radial-gradient(68rem 44rem at 70% 22%, rgba(var(--aurora), 0.55), transparent 70%),
    radial-gradient(44rem 30rem at 94% 70%, rgba(var(--aurora), 0.3), transparent 74%),
    radial-gradient(34rem 24rem at 52% 84%, rgba(var(--aurora), 0.18), transparent 78%);
  animation: drift 46s ease-in-out infinite alternate;
}

@keyframes drift {
  from { transform: translate3d(-1.5%, 0, 0) scale(1); }
  to { transform: translate3d(1.5%, 1.5%, 0) scale(1.06); }
}

.hero__grid {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: 0.84fr 1.16fr;
  gap: 72px;
  align-items: center;
}

.hero h1 {
  margin: 26px 0 22px;
  font-size: clamp(2.5rem, 4.4vw, 4rem);
  font-weight: 250;
  line-height: 1.08;
  letter-spacing: -0.05em;
}

.hero h1 em {
  font-style: normal;
  background: linear-gradient(180deg, #ffffff 20%, #b9c7e8 100%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.hero__lead {
  max-width: 27em;
  font-size: 0.98rem;
  font-weight: 300;
  line-height: 1.85;
  color: var(--ink-2);
}

.hero__cta {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 38px;
}

.hero__meta {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 22px;
  margin-top: 30px;
  font-size: 0.76rem;
  font-weight: 300;
  letter-spacing: 0.02em;
  color: var(--ink-4);
}

.hero__meta li {
  display: flex;
  align-items: center;
  gap: 8px;
}

.hero__meta li::before {
  content: "";
  width: 3px;
  height: 3px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.28);
}

/* 下载密码 */
.dl-hint {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 16px;
  font-size: 0.76rem;
  font-weight: 300;
  color: var(--ink-4);
}

.dl-hint--center {
  justify-content: center;
  margin-top: 22px;
}

.dl-code {
  padding: 2px 9px;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: rgba(255, 255, 255, 0.03);
  font-family: var(--mono);
  font-size: 0.78rem;
  letter-spacing: 0.14em;
  color: var(--ink-2);
  transition: border-color 0.2s, color 0.2s, background 0.2s;
}

.dl-code:hover {
  border-color: var(--line-2);
  background: rgba(255, 255, 255, 0.06);
  color: var(--ink);
}

.dl-code.is-copied {
  border-color: rgba(120, 220, 180, 0.45);
  background: rgba(120, 220, 180, 0.09);
  color: #a9f0d2;
}

.dl-hint__tip {
  font-size: 0.72rem;
  color: var(--ink-4);
}

/* ---------- 6. 悬浮玻璃窗口 ---------- */
.hero__visual {
  position: relative;
  perspective: 2000px;
  perspective-origin: 60% 50%;
}

/* 光池：把窗口“托”起来 */
.hero__visual::before {
  content: "";
  position: absolute;
  inset: 8% -6% -10% -6%;
  z-index: -1;
  border-radius: 50%;
  background: radial-gradient(closest-side, rgba(var(--aurora), 0.26), transparent 74%);
  filter: blur(50px);
}

/* 触地阴影：制造纵深与景深 */
.hero__visual::after {
  content: "";
  position: absolute;
  left: 8%;
  right: 14%;
  bottom: -42px;
  height: 70px;
  border-radius: 50%;
  background: radial-gradient(closest-side, rgba(0, 0, 0, 0.95), transparent 78%);
  filter: blur(26px);
  z-index: -1;
}

.glow {
  position: absolute;
  border-radius: 50%;
  filter: blur(90px);
  pointer-events: none;
  z-index: -1;
}

.glow--a {
  width: 300px;
  height: 260px;
  top: -90px;
  right: -60px;
  background: rgba(var(--aurora), 0.16);
}

.glow--b {
  width: 240px;
  height: 200px;
  bottom: -90px;
  left: -70px;
  background: rgba(var(--aurora), 0.09);
}

.shot-frame {
  position: relative;
  margin: 0;
  padding: 1px;
  border-radius: 20px;
  background: linear-gradient(
    145deg,
    rgba(255, 255, 255, 0.3),
    rgba(255, 255, 255, 0.05) 38%,
    rgba(255, 255, 255, 0.03) 60%,
    rgba(255, 255, 255, 0.16)
  );
  box-shadow: var(--shadow-win), 0 0 0 1px rgba(150, 180, 255, 0.08), inset 0 0 0 1px rgba(255, 255, 255, 0.06);
  transform: rotateY(-6deg) rotateX(1.2deg) translateZ(0);
  transition: transform 1.4s var(--ease), box-shadow 0.6s;
  transform-style: preserve-3d;
}

.hero__visual:hover .shot-frame {
  transform: rotateY(-1.5deg) rotateX(0deg);
  box-shadow:
    0 1px 1px rgba(0, 0, 0, 0.7),
    0 24px 50px -22px rgba(0, 0, 0, 0.92),
    0 70px 140px -50px rgba(0, 0, 0, 1),
    0 0 180px -70px rgba(var(--aurora), 0.9);
}

.shot-frame img {
  width: 100%;
  height: auto;
  border-radius: 19px;
  filter: brightness(0.9) contrast(1.03) saturate(0.94);
}

/* 玻璃罩：一层极淡的冷色，压住白底眩光 */
.shot-frame::before {
  content: "";
  position: absolute;
  inset: 1px;
  border-radius: 19px;
  pointer-events: none;
  z-index: 1;
  background: linear-gradient(180deg, rgba(18, 26, 46, 0.14), rgba(6, 8, 14, 0.3));
}

/* 玻璃高光：极淡的一层反光 */
.shot-frame::after {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: 20px;
  pointer-events: none;
  background: linear-gradient(
    155deg,
    rgba(255, 255, 255, 0.16) 0%,
    rgba(255, 255, 255, 0.03) 26%,
    rgba(255, 255, 255, 0) 48%
  );
  opacity: 0.45;
}

/* ---------- 7. 信任条 ---------- */
.trust {
  position: relative;
  z-index: 1;
  margin-top: 104px;
  padding-top: 28px;
  border-top: 1px solid var(--line);
}

.trust__label {
  margin-bottom: 18px;
  font-size: 0.72rem;
  font-weight: 300;
  letter-spacing: 0.14em;
  color: var(--ink-4);
}

.trust__row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 14px 40px;
}

.trust__row span {
  font-size: 0.86rem;
  font-weight: 300;
  letter-spacing: 0.1em;
  color: #5a5f6a;
  transition: color 0.3s;
}

.trust__row span:hover {
  color: #8d919b;
}

/* ---------- 8. 区块 ---------- */
.section {
  position: relative;
  padding: 140px 0;
}

.section--alt {
  background: linear-gradient(180deg, transparent, rgba(255, 255, 255, 0.012) 22%, rgba(255, 255, 255, 0.012) 78%, transparent);
  border-block: 1px solid rgba(255, 255, 255, 0.04);
}

.section--tight {
  padding: 56px 0;
}

.head {
  max-width: 720px;
  margin-bottom: 64px;
}

.head h2 {
  font-size: clamp(1.7rem, 2.5vw, 2.25rem);
  font-weight: 300;
  line-height: 1.28;
  letter-spacing: -0.035em;
}

.head__sub {
  margin-top: 20px;
  max-width: 60ch;
  font-size: 0.94rem;
  font-weight: 300;
  line-height: 1.8;
  color: var(--ink-3);
}

/* ---------- 9. 功能卡 ---------- */
.bento {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  border: 1px solid var(--line);
  border-radius: 20px;
  background: var(--line);
  overflow: hidden;
}

.card {
  position: relative;
  padding: 34px;
  background: #050506;
  transition: background 0.5s;
}

.card:hover {
  background: #08080a;
}

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

.card__icon {
  display: grid;
  place-items: center;
  width: 38px;
  height: 38px;
  margin-bottom: 26px;
  border: 1px solid var(--line);
  border-radius: 10px;
  color: #b9c4dc;
  background: rgba(255, 255, 255, 0.015);
  transition: border-color 0.4s, color 0.4s;
}

.card:hover .card__icon {
  border-color: rgba(var(--aurora), 0.35);
  color: #dfe8ff;
}

.card__icon svg {
  width: 19px;
  height: 19px;
}

.card h3 {
  margin-bottom: 10px;
  font-size: 1.05rem;
  font-weight: 400;
  letter-spacing: -0.01em;
}

.card > p {
  font-size: 0.88rem;
  font-weight: 300;
  line-height: 1.85;
  color: var(--ink-3);
}

.chips {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 26px;
}

.chip {
  padding: 4px 11px;
  border: 1px solid var(--line);
  border-radius: 999px;
  font-size: 0.72rem;
  font-weight: 300;
  letter-spacing: 0.04em;
  color: var(--ink-3);
  transition: border-color 0.25s, color 0.25s;
}

.chip:hover {
  border-color: var(--line-2);
  color: var(--ink-2);
}

/* ---------- 10. 侧边栏工具 ---------- */
.tools {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 1px;
  border: 1px solid var(--line);
  border-radius: 14px;
  background: var(--line);
  overflow: hidden;
}

.tool {
  display: flex;
  align-items: center;
  gap: 9px;
  padding: 16px 18px;
  background: #040405;
  font-size: 0.84rem;
  font-weight: 300;
  color: var(--ink-3);
  transition: background 0.35s, color 0.35s;
}

.tool:hover {
  background: #08080a;
  color: var(--ink-2);
}

.tool:not(.is-live) {
  color: #555a65;
}

.tool.is-live::before {
  content: "";
  width: 4px;
  height: 4px;
  flex: none;
  border-radius: 50%;
  background: rgba(var(--aurora), 0.85);
  box-shadow: 0 0 8px rgba(var(--aurora), 0.7);
}

.tools__note {
  max-width: 940px;
  margin-top: 22px;
  font-size: 0.76rem;
  font-weight: 300;
  line-height: 1.8;
  color: var(--ink-4);
}

/* ---------- 11. 界面截图 ---------- */
.gallery {
  padding: 10px;
  border: 1px solid var(--line);
  border-radius: 22px;
  background: #040405;
}

.gallery__stage {
  position: relative;
  border: 1px solid var(--line);
  border-radius: 14px;
  overflow: hidden;
  background: #000;
  aspect-ratio: 1600 / 896;
}

.gallery__stage img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: opacity 0.3s ease;
}

.gallery__stage img.is-fading {
  opacity: 0;
}

.gallery__caption {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 24px;
  padding: 16px 8px 6px;
}

.gallery__caption b {
  display: block;
  font-size: 0.92rem;
  font-weight: 400;
}

.gallery__caption span {
  display: block;
  margin-top: 2px;
  font-size: 0.78rem;
  font-weight: 300;
  color: var(--ink-3);
}

.gallery__count {
  flex: none;
  font-family: var(--mono);
  font-size: 0.7rem;
  letter-spacing: 0.1em;
  color: var(--ink-4);
}

.shots {
  display: grid;
  grid-template-columns: repeat(7, 1fr);
  gap: 8px;
  margin-top: 14px;
}

.shot {
  display: flex;
  flex-direction: column;
  gap: 7px;
  padding: 5px;
  border: 1px solid transparent;
  border-radius: 9px;
  text-align: left;
  transition: border-color 0.3s, background 0.3s;
}

.shot img {
  width: 100%;
  height: auto;
  border-radius: 5px;
  border: 1px solid rgba(255, 255, 255, 0.06);
  filter: grayscale(35%) brightness(0.72);
  opacity: 0.85;
  transition: filter 0.35s, opacity 0.35s, border-color 0.35s;
}

.shot span {
  font-size: 0.68rem;
  font-weight: 300;
  color: var(--ink-4);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  transition: color 0.3s;
}

.shot:hover img {
  filter: grayscale(10%) brightness(0.92);
}

.shot:hover span {
  color: var(--ink-3);
}

.shot[aria-selected="true"] {
  border-color: var(--line);
  background: rgba(255, 255, 255, 0.025);
}

.shot[aria-selected="true"] img {
  filter: none;
  opacity: 1;
  border-color: rgba(var(--aurora), 0.3);
}

.shot[aria-selected="true"] span {
  color: var(--ink-2);
}

/* ---------- 12. 数据 ---------- */
.stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  border-block: 1px solid var(--line);
}

.stat {
  padding: 40px 28px;
  text-align: left;
  border-left: 1px solid var(--line);
}

.stat:first-child {
  border-left: 0;
  padding-left: 0;
}

.stat b {
  display: block;
  font-family: var(--font-display);
  font-size: clamp(1.9rem, 3vw, 2.6rem);
  font-weight: 250;
  letter-spacing: -0.04em;
  line-height: 1.1;
  color: #f7f8fa;
  font-variant-numeric: tabular-nums;
}

.stat span {
  display: block;
  margin-top: 8px;
  font-size: 0.78rem;
  font-weight: 300;
  letter-spacing: 0.02em;
  color: var(--ink-4);
}

/* ---------- 13. 三步 ---------- */
.steps {
  display: grid;
  grid-template-columns: 0.85fr 1.15fr;
  gap: 80px;
  align-items: start;
}

.steps__intro h2 {
  margin-bottom: 16px;
  font-size: clamp(1.6rem, 2.3vw, 2.1rem);
  font-weight: 300;
}

.steps__intro .btn {
  margin-top: 32px;
}

.steps__list {
  display: grid;
}

.steps__list li {
  position: relative;
  padding: 26px 0 26px 76px;
  border-top: 1px solid var(--line);
}

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

.steps__num {
  position: absolute;
  left: 0;
  top: 28px;
  font-family: var(--mono);
  font-size: 0.74rem;
  letter-spacing: 0.12em;
  color: var(--ink-4);
}

.steps__list h3 {
  margin-bottom: 7px;
  font-size: 1rem;
  font-weight: 400;
}

.steps__list p {
  max-width: 46ch;
  font-size: 0.86rem;
  font-weight: 300;
  line-height: 1.85;
  color: var(--ink-3);
}

/* ---------- 14. 免费与赞助 ---------- */
.plans {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 14px;
  align-items: start;
}

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

.plan {
  position: relative;
  padding: 30px;
  border: 1px solid var(--line);
  border-radius: 18px;
  background: #040405;
  transition: border-color 0.4s, background 0.4s;
}

.plan:hover {
  border-color: var(--line-2);
  background: #070709;
}

.plan--hot {
  border-color: rgba(var(--aurora), 0.3);
  background:
    radial-gradient(120% 80% at 50% 0%, rgba(var(--aurora), 0.08), transparent 70%),
    #050507;
  box-shadow: 0 30px 80px -50px rgba(var(--aurora), 0.75);
}

.plan__badge {
  position: absolute;
  top: -10px;
  left: 30px;
  padding: 3px 11px;
  border: 1px solid rgba(var(--aurora), 0.35);
  border-radius: 999px;
  background: #06070a;
  font-size: 0.66rem;
  font-weight: 400;
  letter-spacing: 0.04em;
  color: #c8d6f5;
}

.plan h3 {
  font-size: 1rem;
  font-weight: 400;
  letter-spacing: -0.01em;
}

.plan__desc {
  margin-top: 6px;
  font-size: 0.76rem;
  font-weight: 300;
  color: var(--ink-4);
}

.plan__price {
  display: flex;
  align-items: baseline;
  gap: 4px;
  margin: 22px 0;
}

.plan__price .cur {
  font-size: 0.95rem;
  font-weight: 300;
  color: var(--ink-3);
}

.plan__price .num {
  font-family: var(--font-display);
  font-size: 2.4rem;
  font-weight: 250;
  letter-spacing: -0.04em;
  line-height: 1;
  font-variant-numeric: tabular-nums;
}

.plan__price .per {
  font-size: 0.74rem;
  font-weight: 300;
  color: var(--ink-4);
}

.plans--four .plan {
  padding: 26px;
}

.plans--four .plan__price .num {
  font-size: 2.1rem;
}

.plan__list {
  display: grid;
  gap: 11px;
  margin-top: 24px;
  padding-top: 22px;
  border-top: 1px solid var(--line);
  font-size: 0.82rem;
  font-weight: 300;
  color: var(--ink-3);
}

.plan__list li {
  position: relative;
  padding-left: 20px;
}

.plan__list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.62em;
  width: 5px;
  height: 1px;
  background: rgba(var(--aurora), 0.55);
}

.plans__note {
  margin-top: 28px;
  font-size: 0.75rem;
  font-weight: 300;
  line-height: 1.8;
  color: var(--ink-4);
}

/* ---------- 15. FAQ ---------- */
.faq {
  border-top: 1px solid var(--line);
}

.faq__item {
  border-bottom: 1px solid var(--line);
}

.faq__item summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 24px 2px;
  font-size: 0.95rem;
  font-weight: 400;
  cursor: pointer;
  list-style: none;
  transition: color 0.25s;
}

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

.faq__item summary:hover,
.faq__item[open] summary {
  color: #ffffff;
}

.faq__icon {
  position: relative;
  width: 16px;
  height: 16px;
  flex: none;
  border-radius: 50%;
  border: 1px solid var(--line-2);
}

.faq__icon::before,
.faq__icon::after {
  content: "";
  position: absolute;
  inset: 50% 4px auto;
  height: 1px;
  background: var(--ink-3);
  transform: translateY(-50%);
  transition: transform 0.35s var(--ease), background 0.3s;
}

.faq__icon::after {
  transform: translateY(-50%) rotate(90deg);
}

.faq__item[open] .faq__icon::after {
  transform: translateY(-50%) rotate(0);
}

.faq__item[open] .faq__icon {
  border-color: rgba(var(--aurora), 0.5);
}

.faq__item[open] .faq__icon::before,
.faq__item[open] .faq__icon::after {
  background: #c9d6f2;
}

.faq__body {
  padding: 0 40px 26px 2px;
  animation: fadeUp 0.4s var(--ease);
}

.faq__body p {
  font-size: 0.87rem;
  font-weight: 300;
  line-height: 1.9;
  color: var(--ink-3);
}

@keyframes fadeUp {
  from { opacity: 0; transform: translateY(6px); }
  to { opacity: 1; transform: none; }
}

/* ---------- 16. 下载区 ---------- */
.cta {
  position: relative;
  padding: 110px 40px;
  border: 1px solid var(--line);
  border-radius: 28px;
  background:
    radial-gradient(60% 50% at 50% 0%, rgba(var(--aurora), 0.12), transparent 72%),
    #030304;
  text-align: center;
  overflow: hidden;
}

.cta::before {
  content: "";
  position: absolute;
  inset: 0 18% auto;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(var(--aurora), 0.55), transparent);
}

.cta .eyebrow::before {
  display: none;
}

.cta h2 {
  margin: 0 auto 18px;
  font-size: clamp(1.9rem, 3.2vw, 2.7rem);
  font-weight: 250;
  line-height: 1.24;
  letter-spacing: -0.04em;
}

.cta__sub {
  max-width: 52ch;
  margin: 0 auto;
  font-size: 0.9rem;
  font-weight: 300;
  color: var(--ink-3);
}

.cta__actions {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 12px;
  margin-top: 40px;
}

.cta__meta {
  margin-top: 24px;
  font-size: 0.74rem;
  font-weight: 300;
  letter-spacing: 0.02em;
  color: var(--ink-4);
}

.cta__meta b {
  font-weight: 400;
  color: var(--ink-3);
  font-variant-numeric: tabular-nums;
}

/* ---------- 17. 页脚 ---------- */
.footer {
  padding: 80px 0 56px;
  border-top: 1px solid var(--line);
}

.footer__grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 48px;
}

.footer__brand p {
  max-width: 30ch;
  margin-top: 16px;
  font-size: 0.84rem;
  font-weight: 300;
  line-height: 1.8;
  color: var(--ink-4);
}

.footer__copy {
  margin-top: 26px !important;
  max-width: none !important;
  font-size: 0.72rem !important;
  line-height: 1.7;
  color: #34383f !important;
}

.footer__col {
  display: flex;
  flex-direction: column;
  gap: 11px;
}

.footer__col h4 {
  margin-bottom: 6px;
  font-size: 0.7rem;
  font-weight: 400;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: #454952;
}

.footer__col a {
  font-size: 0.84rem;
  font-weight: 300;
  color: var(--ink-3);
  transition: color 0.25s;
}

.footer__col a:hover {
  color: var(--ink);
}

/* ---------- 18. 回到顶部 ---------- */
.to-top {
  position: fixed;
  right: 26px;
  bottom: 26px;
  z-index: 90;
  display: grid;
  place-items: center;
  width: 40px;
  height: 40px;
  border: 1px solid var(--line);
  border-radius: 50%;
  background: rgba(0, 0, 0, 0.6);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  color: var(--ink-3);
  opacity: 0;
  visibility: hidden;
  transform: translateY(8px);
  transition: opacity 0.35s, visibility 0.35s, transform 0.35s, border-color 0.3s, color 0.3s;
}

.to-top svg {
  width: 16px;
  height: 16px;
}

.to-top.is-visible {
  opacity: 1;
  visibility: visible;
  transform: none;
}

.to-top:hover {
  border-color: var(--line-2);
  color: var(--ink);
}

/* ---------- 19. 滚动出现 ---------- */
.reveal {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity 1s var(--ease), transform 1s var(--ease);
  transition-delay: var(--delay, 0ms);
  will-change: opacity, transform;
}

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

/* ---------- 20. 响应式 ---------- */
@media (max-width: 1080px) {
  .hero__grid {
    gap: 44px;
  }

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

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

  .steps {
    gap: 48px;
  }

  .shots {
    grid-template-columns: repeat(5, 1fr);
  }
}

@media (max-width: 900px) {
  :root {
    --nav-h: 66px;
  }

  .nav__links {
    position: fixed;
    inset: var(--nav-h) 0 auto;
    flex-direction: column;
    gap: 2px;
    padding: 14px 24px 22px;
    background: rgba(0, 0, 0, 0.92);
    backdrop-filter: blur(24px);
    border-bottom: 1px solid var(--line);
    margin: 0;
    transform: translateY(-10px);
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.3s, transform 0.3s, visibility 0.3s;
  }

  .nav__links.is-open {
    opacity: 1;
    visibility: visible;
    transform: none;
  }

  .nav__links a {
    padding: 12px 10px;
    font-size: 0.95rem;
    border-radius: 8px;
    color: var(--ink-2);
  }

  .nav__actions .btn--ghost {
    display: none;
  }

  .nav__burger {
    display: grid;
    margin-left: auto;
  }

  .nav__actions {
    margin-left: 0;
  }

  .hero {
    padding-top: calc(var(--nav-h) + 64px);
  }

  /* 窄屏上极光铺满会发灰，压低强度 */
  .hero__bg {
    opacity: 0.22;
  }

  .hero__grid {
    grid-template-columns: 1fr;
    gap: 64px;
  }

  .hero__lead {
    max-width: 36em;
  }

  .hero__visual {
    max-width: 640px;
    perspective: none;
  }

  .shot-frame,
  .hero__visual:hover .shot-frame {
    transform: none;
  }

  .trust {
    margin-top: 72px;
  }

  .section {
    padding: 96px 0;
  }

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

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

  .stat:nth-child(1),
  .stat:nth-child(2) {
    border-top: 0;
  }

  .stat:nth-child(odd) {
    padding-left: 0;
    border-left: 0;
  }

  .steps,
  .plans {
    grid-template-columns: 1fr;
  }

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

  .plan--hot {
    order: -1;
  }

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

  .footer__grid {
    grid-template-columns: 1fr 1fr;
    gap: 36px;
  }

  .footer__brand {
    grid-column: 1 / -1;
  }

  .cta {
    padding: 72px 24px;
  }

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

@media (max-width: 720px) {
  .wrap,
  .wrap--narrow {
    width: calc(100% - 36px);
  }

  .hero h1 {
    font-size: clamp(1.9rem, 7.2vw, 2.3rem);
    line-height: 1.14;
  }

  .hero__cta .btn {
    flex: 1 1 100%;
  }

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

  .card--wide {
    grid-column: 1;
  }

  .card {
    padding: 26px;
  }

  .trust__row {
    gap: 12px 24px;
  }

  .trust__row span {
    font-size: 0.76rem;
  }

  .head {
    margin-bottom: 40px;
  }

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

  .plans,
  .plans--four {
    grid-template-columns: 1fr;
  }

  .plan {
    padding: 24px;
  }

  .gallery {
    padding: 8px;
  }

  .shots {
    grid-template-columns: repeat(3, 1fr);
    gap: 6px;
  }

  .shot {
    padding: 4px;
  }

  .gallery__caption {
    padding: 12px 6px 4px;
  }

  .faq__body {
    padding-right: 8px;
  }

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

  .to-top {
    right: 16px;
    bottom: 16px;
  }
}

@media (max-width: 460px) {
  .brand__text em {
    display: none;
  }

  .nav__actions .btn {
    --px: 14px;
  }

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

  .gallery__caption {
    flex-direction: column;
    align-items: flex-start;
    gap: 4px;
  }

  .cta__actions .btn {
    flex: 1 1 100%;
  }
}

/* ---------- 21. 无障碍 / 偏好 ---------- */
@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  *,
  *::before,
  *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
  }

  .reveal {
    opacity: 1;
    transform: none;
  }

  .hero__bg {
    animation: none;
  }
}

@media print {
  .nav,
  .to-top,
  .hero__bg {
    display: none !important;
  }

  body {
    color: #111;
    background: #fff;
  }
}