/* =========================================================
   NovaLauncher 官网 — 苹果式版式
   白底、大字号、居中标题、产品图通栏、深浅区块交替
   ========================================================= */

/* ---------- 1. 基础 ---------- */
:root {
  --white: #ffffff;
  --gray: #f5f5f7;
  --ink: #1d1d1f;
  --ink-2: #6e6e73;
  --ink-3: #86868b;
  --line: #d2d2d7;
  --blue: #0066cc;
  --blue-btn: #0071e3;
  --black: #000000;

  --ease: cubic-bezier(0.22, 1, 0.36, 1);
  --dur-enter: 520ms;
  --dur-hover: 220ms;
  --dur-pop: 320ms;

  --nav-h: 48px;
  --font: -apple-system, BlinkMacSystemFont, "SF Pro Display", "SF Pro Text",
    "Helvetica Neue", "PingFang SC", "Microsoft YaHei", system-ui, sans-serif;
}

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--nav-h) + 20px);
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  background: var(--white);
  color: var(--ink);
  font-family: var(--font);
  font-size: 17px;
  line-height: 1.47;
  letter-spacing: -0.01em;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

h1, h2, h3, h4 { margin: 0; font-weight: 600; letter-spacing: -0.015em; }
p { margin: 0; }
a { color: inherit; text-decoration: none; }
button { font: inherit; color: inherit; background: none; border: 0; cursor: pointer; }
img { display: block; max-width: 100%; height: auto; }
ul { margin: 0; padding: 0; list-style: none; }

::selection { background: #b3d7ff; }

:focus-visible { outline: 2px solid var(--blue-btn); outline-offset: 3px; border-radius: 4px; }

.skip {
  position: absolute; left: 16px; top: -60px; z-index: 200;
  padding: 10px 16px; border-radius: 8px; background: var(--ink); color: #fff; font-size: 14px;
}
.skip:focus { top: 12px; }

/* ---------- 2. 导航 ---------- */
.nav {
  position: fixed; inset: 0 0 auto; z-index: 100;
  height: var(--nav-h);
  background: rgba(255, 255, 255, 0.72);
  backdrop-filter: saturate(180%) blur(20px);
  -webkit-backdrop-filter: saturate(180%) blur(20px);
  border-bottom: 0.5px solid rgba(0, 0, 0, 0.1);
  transition: box-shadow var(--dur-pop) var(--ease), background-color var(--dur-pop) var(--ease);
}

.nav.is-scrolled { box-shadow: 0 1px 12px rgba(0, 0, 0, 0.08); }

.nav__inner {
  max-width: 1000px; height: 100%; margin: 0 auto; padding: 0 22px;
  display: flex; align-items: center; gap: 24px;
}

.nav__brand {
  display: inline-flex; align-items: center; gap: 6px;
  font-size: 14px; font-weight: 500; letter-spacing: -0.01em;
}
.nav__brand svg { width: 15px; height: 15px; }

.nav__links {
  position: absolute; left: 50%; transform: translateX(-50%);
  display: flex; gap: 32px;
}

.nav__links a {
  font-size: 12px; color: rgba(29, 29, 31, 0.8);
  transition: color var(--dur-hover) var(--ease);
}
.nav__links a:hover { color: var(--ink); }

.nav__buy {
  margin-left: auto; font-size: 12px; color: var(--blue);
}
.nav__buy:hover { text-decoration: underline; }

.nav__burger { display: none; width: 32px; height: 32px; margin-left: auto; }
.nav__burger span { display: block; width: 16px; height: 1px; margin: 4px auto; background: var(--ink); }

/* ---------- 3. 首屏 ---------- */
.hero {
  padding: calc(var(--nav-h) + 84px) 0 0;
  text-align: center;
}

.hero__copy {
  max-width: 780px;
  margin: 0 auto;
  padding: 0 22px;
}

.hero__eyebrow {
  font-size: 14px; color: var(--ink-3); margin-bottom: 14px;
}

.hero h1 {
  font-size: clamp(2.6rem, 6vw, 4.75rem);
  line-height: 1.06;
  letter-spacing: -0.025em;
  margin: 0 auto 22px;
  max-width: 15em;
}

.hero__sub {
  max-width: 620px; margin: 0 auto;
  font-size: clamp(1.06rem, 1.8vw, 1.32rem);
  line-height: 1.42;
  color: var(--ink-2);
  letter-spacing: 0;
}

.hero__links {
  display: flex; justify-content: center; flex-wrap: wrap; gap: 34px;
  margin-top: 26px;
}

.link {
  display: inline-flex; align-items: center; gap: 4px;
  font-size: 17px; color: var(--blue);
  transition: opacity var(--dur-hover) var(--ease);
}
.link span { font-size: 18px; line-height: 1; }
.link:hover { opacity: 0.7; }

.hero__note {
  margin-top: 16px;
  font-size: 13px; color: var(--ink-3);
}

code[data-copy] {
  color: var(--blue); cursor: pointer;
  border-bottom: 1px solid rgba(0, 102, 204, 0.35);
  transition: border-color var(--dur-hover) var(--ease);
}
code[data-copy]:hover { border-color: var(--blue); }
code[data-copy].is-copied { color: #0a8f4d; border-color: rgba(10, 143, 77, 0.4); }

/* 产品图：不再通栏，收在 960 以内，圆角 + 一层很淡的投影 */
.hero__shot {
  max-width: 960px;
  margin: 52px auto 0;
  padding: 0 22px;
}

.hero__shot img {
  border-radius: 16px;
  box-shadow: 0 2px 6px rgba(0, 0, 0, 0.06), 0 24px 48px -24px rgba(0, 0, 0, 0.28);
}

.hero__shot img { width: 100%; height: auto; }

/* ---------- 4. 规格条 ---------- */
.strip {
  margin-top: 88px;
  background: var(--gray);
  border-block: 1px solid rgba(0, 0, 0, 0.04);
}

.strip__inner {
  max-width: 1000px; margin: 0 auto; padding: 18px 22px;
  display: flex; flex-wrap: wrap; gap: 14px 48px; justify-content: center;
}

.strip span {
  display: flex; flex-direction: column; gap: 2px;
  font-size: 12px; color: var(--ink-3);
}

.strip b {
  font-size: 14px; font-weight: 500; color: var(--ink); letter-spacing: -0.01em;
}

/* ---------- 5. 区块 ---------- */
.section {
  padding: 140px 22px;
  max-width: 1024px;
  margin: 0 auto;
}

.section--dark {
  max-width: none;
  background-color: var(--black);
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.045) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.045) 1px, transparent 1px);
  background-size: 48px 48px;
  color: #f5f5f7;
  padding-inline: 22px;
}

.section--dark > * { max-width: 1024px; margin-inline: auto; }

.section--gray {
  max-width: none;
  background: var(--gray);
  padding-inline: 22px;
}

.section--gray > * { max-width: 1024px; margin-inline: auto; }

.section__head {
  max-width: 760px;
  margin: 0 auto 64px;
  text-align: center;
}

.section__head h2 {
  font-size: clamp(2rem, 3.6vw, 3rem);
  line-height: 1.12;
  letter-spacing: -0.02em;
  margin-bottom: 18px;
}

.section__head p {
  font-size: clamp(1rem, 1.5vw, 1.18rem);
  line-height: 1.5;
  color: var(--ink-2);
  letter-spacing: 0;
}

.section--dark .section__head p { color: #a1a1a6; }

/* ---------- 6. 功能 ---------- */
.feats {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 56px 72px;
}

.feat__icon {
  display: grid;
  place-items: center;
  width: 44px;
  height: 44px;
  margin-bottom: 14px;
  border-radius: 12px;
  background: #f5f5f7;
  color: #0071e3;
}

.feat__icon svg { width: 24px; height: 24px; }

.feat h3 {
  font-size: 24px; line-height: 1.3; letter-spacing: -0.015em;
  margin-bottom: 10px;
}

.feat p {
  font-size: 16px; line-height: 1.6; color: var(--ink-2); letter-spacing: 0;
}

/* ---------- 7. 深色展示段 ---------- */
.wide-shot {
  margin: 0 auto;
  max-width: 860px;
}

.wide-shot img {
  width: 100%;
  height: auto;
  border-radius: 14px;
  border: 1px solid rgba(255, 255, 255, 0.1);
}

.teaser-block { margin-top: 72px; }

.teaser-head {
  display: flex; align-items: baseline; justify-content: space-between; gap: 24px;
  margin-bottom: 22px;
}

.teaser-head h3 {
  font-size: clamp(1.3rem, 2vw, 1.7rem);
  letter-spacing: -0.015em;
}

.section--dark .link { color: #2997ff; }

.teaser {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: 14px;
}

.thumb {
  display: block;
  padding: 8px 8px 6px;
  text-align: left;
  border-radius: 12px;
}

.thumb img {
  width: 100%;
  aspect-ratio: 1572 / 972;
  object-fit: cover;
  border-radius: 10px;
  border: 1px solid rgba(255, 255, 255, 0.14);
  opacity: 1;
  transition: opacity var(--dur-hover) var(--ease),
    transform var(--dur-hover) var(--ease),
    border-color var(--dur-hover) var(--ease);
}

.thumb span {
  display: block; margin-top: 7px;
  font-size: 12px; color: #86868b;
}

.thumb:hover img {
  opacity: 1;
  transform: scale(1.02);
  border-color: rgba(255, 255, 255, 0.32);
}

/* ---------- 7.5 品牌数字 ---------- */
.stats {
  background: var(--white);
  border-block: 1px solid rgba(0, 0, 0, 0.06);
}

.stats__inner {
  max-width: 1000px;
  margin: 0 auto;
  padding: 56px 22px;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  text-align: center;
}

.stat b {
  display: block;
  font-size: clamp(2.2rem, 3.4vw, 3.2rem);
  font-weight: 600;
  letter-spacing: -0.03em;
  line-height: 1;
  color: var(--ink);
  font-variant-numeric: tabular-nums;
}

.stat span {
  display: block;
  margin-top: 10px;
  font-size: 13px;
  color: var(--ink-3);
  letter-spacing: 0;
}

/* ---------- 8. 价格 ---------- */
.plans {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}

.plan {
  background: var(--white);
  border-radius: 18px;
  padding: 32px 28px 28px;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.06), 0 12px 30px -18px rgba(0, 0, 0, 0.2);
  display: flex;
  flex-direction: column;
}

.plan h3 { font-size: 20px; letter-spacing: -0.01em; }

.plan__price {
  margin: 12px 0 10px;
  font-size: 34px; font-weight: 600; letter-spacing: -0.02em;
  display: flex; align-items: baseline; gap: 6px;
}

.plan__price span { font-size: 14px; font-weight: 400; color: var(--ink-3); }

.plan__desc {
  font-size: 14px; color: var(--ink-2); letter-spacing: 0; min-height: 2.8em;
}

.plan ul {
  margin: 20px 0 28px;
  display: grid; gap: 10px;
  font-size: 14px; color: var(--ink-2); letter-spacing: 0;
  flex: 1;
}

.plan ul li { position: relative; padding-left: 16px; }
.plan ul li::before {
  content: ""; position: absolute; left: 0; top: 0.6em;
  width: 6px; height: 6px; border-radius: 50%; background: #c7c7cc;
}

.btn {
  display: inline-flex; align-items: center; justify-content: center;
  padding: 10px 20px; border-radius: 980px;
  background: var(--blue-btn); color: #fff;
  font-size: 15px; letter-spacing: -0.01em;
  transition: background-color var(--dur-hover) var(--ease),
    transform var(--dur-hover) var(--ease);
}

.btn:hover { background: #0077ed; }
.btn:active { transform: scale(0.98); }

.btn--ghost {
  background: transparent; color: var(--blue);
  border: 1px solid rgba(0, 102, 204, 0.35);
}
.btn--ghost:hover { background: rgba(0, 102, 204, 0.06); border-color: var(--blue); }

.btn--lg { padding: 13px 28px; font-size: 17px; }

.fineprint {
  max-width: 760px; margin: 44px auto 0;
  font-size: 12px; line-height: 1.6; color: var(--ink-3); text-align: center;
}

/* ---------- 9. FAQ ---------- */
.faq { max-width: 820px; margin: 0 auto; }

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

.faq__item summary {
  display: flex; align-items: center; justify-content: space-between; gap: 24px;
  padding: 22px 0;
  font-size: 17px; font-weight: 500; letter-spacing: -0.01em;
  cursor: pointer; list-style: none;
}

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

.faq__item summary::after {
  content: "+";
  font-size: 22px; font-weight: 300; color: var(--ink-3);
  transition: transform var(--dur-pop) var(--ease);
}

.faq__item[open] summary::after { transform: rotate(45deg); }

.faq__item p {
  padding: 0 40px 24px 0;
  font-size: 15px; line-height: 1.65; color: var(--ink-2); letter-spacing: 0;
}

/* ---------- 10. 下载 ---------- */
.download { text-align: center; }

.app-icon {
  display: inline-block;
  margin-bottom: 20px;
}

.app-icon svg {
  width: 64px;
  height: 64px;
  border-radius: 14px;
  box-shadow: 0 8px 20px -8px rgba(0, 0, 0, 0.35);
}

.download h2 {
  font-size: clamp(1.9rem, 3.2vw, 2.6rem);
  letter-spacing: -0.02em;
  margin-bottom: 12px;
}

.download__sub { font-size: 15px; color: var(--ink-2); margin-bottom: 28px; }

.download__note {
  margin-top: 14px;
  font-size: 13px; color: var(--ink-3);
}

/* ---------- 11. 页脚 ---------- */
.footer {
  background: var(--gray);
  border-top: 1px solid var(--line);
  padding: 40px 22px 48px;
}

.footer__inner { max-width: 1000px; margin: 0 auto; }

.footer__slogan {
  font-size: 14px; font-weight: 500; margin-bottom: 24px;
}

.footer__cols {
  display: grid; grid-template-columns: repeat(3, 1fr);
  gap: 24px; max-width: 520px;
  padding-bottom: 24px; border-bottom: 1px solid var(--line);
}

.footer__cols h4 {
  font-size: 12px; font-weight: 600; margin-bottom: 8px;
}

.footer__cols a {
  display: block; font-size: 12px; color: var(--ink-2); padding: 4px 0;
  transition: color var(--dur-hover) var(--ease);
}
.footer__cols a:hover { color: var(--ink); }

.footer__legal {
  margin-top: 18px;
  font-size: 12px; color: var(--ink-3);
}

/* ---------- 12. 回到顶部 ---------- */
.to-top {
  position: fixed; right: 22px; bottom: 22px; z-index: 40;
  width: 36px; height: 36px; border-radius: 50%;
  display: grid; place-items: center;
  background: rgba(255, 255, 255, 0.9);
  border: 1px solid var(--line);
  color: var(--ink-2);
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
  opacity: 0; visibility: hidden;
  transition: opacity var(--dur-pop) var(--ease), visibility var(--dur-pop) var(--ease),
    transform var(--dur-hover) var(--ease);
}
.to-top svg { width: 14px; height: 14px; }
.to-top.is-visible { opacity: 1; visibility: visible; }
.to-top:hover { transform: translateY(-2px); }

/* ---------- 13. 画廊 ---------- */
.lb {
  position: fixed; inset: 0; z-index: 200;
  display: flex; flex-direction: column; align-items: stretch;
  background: rgba(255, 255, 255, 0.98);
  backdrop-filter: blur(20px);
  opacity: 0;
  transition: opacity var(--dur-pop) var(--ease);
}
.lb[hidden] { display: none; }
.lb[data-state="open"] { opacity: 1; }

.lb__top {
  display: flex; align-items: center; justify-content: space-between; gap: 16px;
  padding: 12px 22px;
  border-bottom: 1px solid var(--line);
}

.lb__tabs { display: flex; flex-wrap: wrap; gap: 8px; }

.chip {
  padding: 6px 14px; border-radius: 980px;
  background: var(--gray);
  font-size: 13px; color: var(--ink-2);
  transition: background-color var(--dur-hover) var(--ease), color var(--dur-hover) var(--ease);
}
.chip:hover { background: #e8e8ed; }
.chip.is-active { background: var(--ink); color: #fff; }

.lb__close {
  width: 32px; height: 32px; border-radius: 50%;
  font-size: 20px; line-height: 1; color: var(--ink-2);
  transition: background-color var(--dur-hover) var(--ease);
}
.lb__close:hover { background: var(--gray); }

.lb__stage {
  position: relative; flex: 1 1 auto; min-height: 0;
  display: grid; place-items: center;
  padding: 24px 72px;
}

.lb__img {
  max-width: 100%; max-height: 100%;
  border-radius: 14px;
  box-shadow: 0 20px 50px -20px rgba(0, 0, 0, 0.4);
  opacity: 0; transform: scale(0.985);
  transition: opacity var(--dur-pop) var(--ease), transform var(--dur-pop) var(--ease);
}
.lb[data-state="open"] .lb__img { opacity: 1; transform: none; }
.lb[data-state="open"] .lb__img.is-fading { opacity: 0; }

.lb__nav {
  position: absolute; top: 50%; transform: translateY(-50%);
  width: 44px; height: 44px; border-radius: 50%;
  font-size: 22px; color: var(--ink-2);
  transition: background-color var(--dur-hover) var(--ease);
}
.lb__nav:hover { background: var(--gray); }
.lb__nav--prev { left: 18px; }
.lb__nav--next { right: 18px; }

.lb__bar {
  display: flex; align-items: center; justify-content: space-between; gap: 16px;
  padding: 12px 22px 16px;
  border-top: 1px solid var(--line);
  font-size: 13px; color: var(--ink-2);
}

.lb__count { font-size: 12px; color: var(--ink-3); }

body.lb-open { overflow: hidden; }

/* ---------- 14. 动效 ---------- */
.js .seq,
.js .anim {
  opacity: 0;
  transform: translateY(12px);
  transition: opacity var(--dur-enter) var(--ease), transform var(--dur-enter) var(--ease);
  transition-delay: var(--d, 0ms);
}

.js .seq.is-in,
.js .anim.is-in { opacity: 1; transform: none; }

.js .seq:not(.is-in),
.js .anim:not(.is-in) { transition-delay: 0ms; transition-duration: 280ms; }

.hero__copy > .seq:nth-child(1) { --d: 0ms; }
.hero__copy > .seq:nth-child(2) { --d: 80ms; }
.hero__copy > .seq:nth-child(3) { --d: 150ms; }
.hero__copy > .seq:nth-child(4) { --d: 220ms; }
.hero__copy > .seq:nth-child(5) { --d: 280ms; }
.hero__shot { --d: 340ms; }

@media (prefers-reduced-motion: reduce) {
  .js .seq, .js .anim {
    opacity: 1 !important; transform: none !important; transition: none !important;
  }
  *, *::before, *::after {
    animation-duration: 0.001ms !important;
    transition-duration: 0.001ms !important;
  }
  html { scroll-behavior: auto; }
}

/* ---------- 15. 响应式 ---------- */
@media (max-width: 1068px) {
  .plans { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 834px) {
  .nav__links { display: none; }
  .nav__burger { display: block; }
  .nav__buy { margin-left: 0; }

  .hero { padding-top: calc(var(--nav-h) + 48px); }
  .hero__shot { margin-top: 40px; border-radius: 14px; }

  .section { padding: 80px 20px; }
  .section--dark, .section--gray { padding-inline: 20px; }

  .feats { grid-template-columns: 1fr; gap: 36px; }
  .feat h3 { font-size: 21px; }

  .strip { margin-top: 64px; }
  .strip__inner { gap: 12px 28px; }

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

  .plans { grid-template-columns: 1fr; }
  .stats__inner { grid-template-columns: repeat(2, 1fr); gap: 32px 16px; padding: 44px 20px; }

  .lb__stage { padding: 16px 52px; }
  .lb__tabs { gap: 6px; }
  .chip { padding: 5px 11px; font-size: 12px; }
}

@media (max-width: 560px) {
  .hero h1 br { display: none; }
  .hero__links { gap: 20px; flex-direction: column; align-items: center; }
  .teaser { grid-template-columns: repeat(2, 1fr); }
  .footer__cols { grid-template-columns: 1fr 1fr; }
  .lb__top { padding: 10px 14px; }
  .lb__stage { padding: 12px 42px; }
}

/* =========================================================
   玻璃拟态动效层（新增）
   ---------------------------------------------------------
   规则
   · 位移/缩放/透明度全部走 transform + opacity
   · 背景渐变用大尺寸图层位移，不改变背景属性，避免重绘
   · 导航高度是唯一影响布局的属性，单独说明
   · 系统「减少动态效果」时整层降级
   ========================================================= */

:root {
  --glass-bg: rgba(255, 255, 255, 0.58);
  --glass-bg-strong: rgba(255, 255, 255, 0.78);
  --glass-line: rgba(255, 255, 255, 0.72);
  --glass-shadow: 0 10px 30px -12px rgba(31, 35, 48, 0.18),
    0 2px 6px -2px rgba(31, 35, 48, 0.08);
  --glass-shadow-hover: 0 24px 48px -18px rgba(31, 35, 48, 0.26),
    0 6px 14px -6px rgba(31, 35, 48, 0.12);
}

/* ---------- 1. 背景：低饱和渐变缓慢流动 ---------- */
body {
  background: #f4f5f9;
}

.bg-fx {
  position: fixed;
  inset: -30% -20%;
  z-index: -1;
  pointer-events: none;
  background:
    radial-gradient(38% 32% at 22% 26%, rgba(122, 156, 255, 0.28), transparent 62%),
    radial-gradient(34% 30% at 78% 18%, rgba(186, 148, 255, 0.24), transparent 64%),
    radial-gradient(36% 34% at 62% 82%, rgba(255, 168, 214, 0.2), transparent 66%),
    radial-gradient(30% 28% at 12% 84%, rgba(160, 214, 255, 0.2), transparent 68%);
  transform: translate3d(0, 0, 0);
  animation: bg-drift 42s ease-in-out infinite alternate;
  will-change: transform;
}

@keyframes bg-drift {
  0%   { transform: translate3d(-1.2%, -0.8%, 0) scale(1.02); }
  50%  { transform: translate3d(1.4%, 1%, 0) scale(1.06); }
  100% { transform: translate3d(-0.6%, 1.6%, 0) scale(1.03); }
}

/* 极轻的颗粒/粒子层：用背景点阵做位移，不新增 DOM */
.bg-fx::after {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    radial-gradient(circle, rgba(255, 255, 255, 0.9) 1px, transparent 1.4px),
    radial-gradient(circle, rgba(255, 255, 255, 0.55) 1px, transparent 1.6px);
  background-size: 180px 180px, 260px 260px;
  background-position: 0 0, 60px 90px;
  opacity: 0.5;
  animation: particle-drift 70s linear infinite;
  will-change: transform;
}

@keyframes particle-drift {
  from { transform: translate3d(0, 0, 0); }
  to   { transform: translate3d(-180px, -260px, 0); }
}

/* ---------- 2. 玻璃卡片 ---------- */
.plan,
.thumb,
.app-icon svg {
  background: var(--glass-bg);
  border: 1px solid var(--glass-line);
  -webkit-backdrop-filter: blur(18px) saturate(150%);
  backdrop-filter: blur(18px) saturate(150%);
  box-shadow: var(--glass-shadow);
}

/* 悬浮：上浮 4px + 放大 1.015 + 阴影加深，250ms */
.plan,
.thumb {
  transition:
    transform 250ms cubic-bezier(0.22, 1, 0.36, 1),
    box-shadow 250ms cubic-bezier(0.22, 1, 0.36, 1),
    background-color 250ms cubic-bezier(0.22, 1, 0.36, 1);
  will-change: transform;
}

@media (hover: hover) and (pointer: fine) {
  .plan:hover,
  .thumb:hover {
    transform: translateY(-4px) scale(1.015);
    box-shadow: var(--glass-shadow-hover);
    background: var(--glass-bg-strong);
  }
}

/* 缩略图本身不再单独放大，交给卡片整体缩放 */
.thumb:hover img { transform: none; }

/* ---------- 3. 滚动入场：错开 0.15s，时长 380ms ---------- */
.js .anim {
  opacity: 0;
  transform: translateY(18px);
  transition:
    opacity 380ms cubic-bezier(0.22, 1, 0.36, 1),
    transform 380ms cubic-bezier(0.22, 1, 0.36, 1);
  transition-delay: calc(var(--i, 0) * 150ms);
}

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

/* 退场不带错峰，避免整块排队消失 */
.js .anim:not(.is-in) {
  transition-delay: 0ms;
  transition-duration: 240ms;
}

/* ---------- 4. 导航：玻璃加深 + 高度收缩 ---------- */
.nav {
  height: var(--nav-h);
  background: rgba(255, 255, 255, 0.42);
  -webkit-backdrop-filter: blur(18px) saturate(160%);
  backdrop-filter: blur(18px) saturate(160%);
  border-bottom: 1px solid rgba(255, 255, 255, 0.5);
  overflow: hidden;
  transition:
    height 300ms cubic-bezier(0.22, 1, 0.36, 1),
    background-color 300ms cubic-bezier(0.22, 1, 0.36, 1),
    box-shadow 300ms cubic-bezier(0.22, 1, 0.36, 1),
    border-color 300ms cubic-bezier(0.22, 1, 0.36, 1);
}

.nav.is-scrolled {
  height: 40px;
  background: rgba(255, 255, 255, 0.72);
  border-bottom-color: rgba(255, 255, 255, 0.85);
  box-shadow: 0 12px 30px -18px rgba(31, 35, 48, 0.35);
}

.nav__inner { transition: transform 300ms cubic-bezier(0.22, 1, 0.36, 1); }
.nav.is-scrolled .nav__inner { transform: scale(0.94); }

/* ---------- 5. 弹窗：淡入 + 0.95 → 1 ---------- */
.lb { transition: opacity 280ms cubic-bezier(0.22, 1, 0.36, 1); }

.lb__img {
  opacity: 0;
  transform: scale(0.95);
  transition:
    opacity 280ms cubic-bezier(0.22, 1, 0.36, 1),
    transform 280ms cubic-bezier(0.22, 1, 0.36, 1);
}

.lb[data-state="open"] .lb__img {
  opacity: 1;
  transform: scale(1);
}

/* 关闭时整体淡出，由 JS 延时 280ms 后再 hidden */
.lb[data-state="closed"] { opacity: 0; pointer-events: none; }

/* ---------- 6. 降级 ---------- */
@media (prefers-reduced-motion: reduce) {
  .bg-fx,
  .bg-fx::after {
    animation: none !important;
  }

  .js .anim {
    opacity: 1 !important;
    transform: none !important;
    transition: none !important;
  }

  .plan,
  .thumb,
  .nav,
  .nav__inner,
  .lb,
  .lb__img {
    transition: none !important;
  }

  .plan:hover,
  .thumb:hover {
    transform: none;
  }
}


/* 深色段里的缩略图用深色玻璃，避免白卡压在黑底上太跳 */
.section--dark .thumb {
  background: rgba(255, 255, 255, 0.06);
  border-color: rgba(255, 255, 255, 0.14);
  box-shadow: none;
}

.section--dark .thumb span {
  color: #b8b8bf;
}

.section--dark .thumb:hover {
  background: rgba(255, 255, 255, 0.12);
  box-shadow: 0 18px 36px -20px rgba(0, 0, 0, 0.8);
}