/* ==========================================================================
   Ziweo — 官网样式表
   设计概念：The Instrument（精密器物）。画廊式留白 + 动态配色强调。
   ========================================================================== */

/* --- 设计令牌（颜色 / 字体 / 间距） ------------------------------------- */
:root {
  /* 中性色：冷调画廊白，刻意避开奶油色 */
  --paper: #f1f1ee;
  --paper-raised: #fbfbfa;
  --ink: #16181c;
  --ink-soft: #393c43;
  --ash: #74787f;
  --line: #dededa;

  /* 深色区块 */
  --night: #121317;
  --night-raised: #1b1d22;
  --night-line: #2c2e35;
  --night-ash: #9a9da6;

  /* 强调色：默认琥珀（橙），由 data-finish 动态切换 */
  --accent: #c0551f;
  --accent-rgb: 192, 85, 31;

  /* 排版 */
  --font-display: "Bricolage Grotesque", "Inter", system-ui, sans-serif;
  --font-body: "Inter", system-ui, -apple-system, sans-serif;
  --font-mono: "IBM Plex Mono", ui-monospace, "SFMono-Regular", monospace;

  /* 布局 */
  --container: 1240px;
  --gutter: clamp(1.25rem, 5vw, 4rem);
  --section-y: clamp(5rem, 12vh, 9.5rem);
  --radius: 4px;

  --ease: cubic-bezier(0.22, 0.61, 0.36, 1);
}

/* 配色主题：切换器与初始加载共用 */
[data-finish="amber"]   { --accent: #c0551f; --accent-rgb: 192, 85, 31; }
[data-finish="glacier"] { --accent: #5c7f9e; --accent-rgb: 92, 127, 158; }
[data-finish="iris"]    { --accent: #8c72a4; --accent-rgb: 140, 114, 164; }

/* --- 基础重置 ----------------------------------------------------------- */
*,
*::before,
*::after { box-sizing: border-box; }

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

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

body {
  margin: 0;
  font-family: var(--font-body);
  font-size: clamp(1rem, 0.96rem + 0.2vw, 1.1rem);
  line-height: 1.6;
  color: var(--ink);
  background: var(--paper);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
}

h1, h2, h3, p { margin: 0; }
img { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }

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

/* --- 复用排版与布局工具 ------------------------------------------------- */
.container {
  width: 100%;
  max-width: var(--container);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

.section { padding-block: var(--section-y); }

.eyebrow {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 500;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--accent);
  display: inline-flex;
  align-items: center;
  gap: 0.6em;
  transition: color 0.6s var(--ease);
}
.eyebrow::before {
  content: "";
  width: 1.6em;
  height: 1px;
  background: currentColor;
  opacity: 0.6;
}

.display {
  font-family: var(--font-display);
  font-weight: 600;
  letter-spacing: -0.025em;
  line-height: 1.0;
  color: var(--ink);
}

.h2 {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: clamp(2rem, 1.3rem + 3.2vw, 3.5rem);
  letter-spacing: -0.022em;
  line-height: 1.02;
}

.lead {
  font-size: clamp(1.12rem, 1rem + 0.6vw, 1.4rem);
  line-height: 1.5;
  color: var(--ink-soft);
}

.muted { color: var(--ash); }

/* --- 按钮 --------------------------------------------------------------- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.55em;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  font-weight: 500;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  padding: 0.95em 1.5em;
  border-radius: 100px;
  border: 1px solid transparent;
  cursor: pointer;
  transition: transform 0.4s var(--ease), background 0.4s var(--ease),
    color 0.4s var(--ease), border-color 0.4s var(--ease);
}
.btn:hover { transform: translateY(-2px); }
.btn:active { transform: translateY(0); }

.btn--primary {
  background: var(--ink);
  color: var(--paper);
}
.btn--primary:hover { background: var(--accent); }

.btn--ghost {
  background: transparent;
  color: var(--ink);
  border-color: var(--line);
}
.btn--ghost:hover { border-color: var(--ink); }

.btn--light {
  background: var(--paper);
  color: var(--ink);
}
.btn--light:hover { background: var(--accent); color: var(--paper); }

.btn .arrow { transition: transform 0.4s var(--ease); }
.btn:hover .arrow { transform: translateX(3px); }

/* ==========================================================================
   导航
   ========================================================================== */
.nav {
  position: fixed;
  inset: 0 0 auto 0;
  z-index: 50;
  transition: background 0.5s var(--ease), border-color 0.5s var(--ease),
    backdrop-filter 0.5s var(--ease);
  border-bottom: 1px solid transparent;
}
.nav.is-stuck {
  background: rgba(241, 241, 238, 0.78);
  backdrop-filter: blur(14px) saturate(1.4);
  border-bottom-color: var(--line);
}
.nav__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
  height: 68px;
}
.brand {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.45rem;
  letter-spacing: -0.02em;
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
}
.brand__dot {
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--accent);
  transition: background 0.6s var(--ease);
}
.nav__links {
  display: flex;
  align-items: center;
  gap: 2rem;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}
.nav__links a { color: var(--ink-soft); transition: color 0.3s var(--ease); }
.nav__links a:hover { color: var(--ink); }
.nav__buy { display: inline-flex; }
.nav__menu-links { display: contents; }

.nav__toggle { display: none; }

@media (max-width: 860px) {
  .nav__menu-links { display: none; }
}

/* ==========================================================================
   Hero
   ========================================================================== */
.hero {
  position: relative;
  min-height: 100svh;
  display: flex;
  align-items: center;
  padding-top: 68px;
  overflow: hidden;
}
.hero__grid {
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  align-items: center;
  gap: clamp(1rem, 4vw, 3rem);
  width: 100%;
}
.hero__copy { max-width: 34rem; }
.hero h1 {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: clamp(2.7rem, 1.6rem + 5vw, 5.4rem);
  letter-spacing: -0.03em;
  line-height: 0.98;
  margin-block: 1.4rem 1.6rem;
}
.hero h1 em {
  font-style: normal;
  color: var(--accent);
  transition: color 0.6s var(--ease);
}
.hero__sub {
  max-width: 30rem;
  color: var(--ink-soft);
  font-size: clamp(1.05rem, 1rem + 0.4vw, 1.25rem);
}
.hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.9rem;
  margin-top: 2.2rem;
}

/* Hero 产品舞台 + 冷雾光晕（签名元素） */
.stage {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: min(82svh, 760px);
}
.stage__halo {
  position: absolute;
  inset: 0;
  margin: auto;
  width: min(124%, 780px);
  aspect-ratio: 1;
  border-radius: 50%;
  background: radial-gradient(
    circle,
    rgba(var(--accent-rgb), 0.5) 0%,
    rgba(var(--accent-rgb), 0.2) 42%,
    transparent 70%
  );
  filter: blur(48px);
  transition: background 0.7s var(--ease);
  animation: halo-pulse 9s ease-in-out infinite;
}
@keyframes halo-pulse {
  0%, 100% { transform: scale(1); opacity: 0.95; }
  50% { transform: scale(1.07); opacity: 1; }
}
.stage__shots {
  position: relative;
  width: 100%;
  height: min(78svh, 720px);
}
.stage__shot {
  position: absolute;
  inset: 0;
  margin: auto;
  width: auto;
  height: 100%;
  object-fit: contain;
  border-radius: 12px;
  opacity: 0;
  transform: scale(0.99);
  transition: opacity 0.8s var(--ease), transform 0.8s var(--ease),
    box-shadow 0.7s var(--ease);
  box-shadow: 0 34px 60px -26px rgba(20, 22, 26, 0.34),
    0 14px 40px rgba(var(--accent-rgb), 0.2);
}
.stage__shot.is-active { opacity: 1; transform: scale(1); }

/* 配色切换器 */
.switcher {
  position: absolute;
  bottom: clamp(1rem, 4vh, 2.5rem);
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  align-items: center;
  gap: 0.9rem;
  z-index: 3;
}
.swatch {
  position: relative;
  width: 30px;
  height: 30px;
  border-radius: 50%;
  border: 1px solid rgba(20, 22, 26, 0.12);
  cursor: pointer;
  padding: 0;
  transition: transform 0.35s var(--ease);
}
.swatch::after {
  content: "";
  position: absolute;
  inset: -6px;
  border-radius: 50%;
  border: 1px solid var(--ink);
  opacity: 0;
  transform: scale(0.7);
  transition: opacity 0.35s var(--ease), transform 0.35s var(--ease);
}
.swatch:hover { transform: scale(1.1); }
.swatch[aria-pressed="true"]::after { opacity: 1; transform: scale(1); }
.swatch--amber   { background: #c0551f; }
.swatch--glacier { background: #93a9bd; }
.swatch--iris    { background: #b69dc9; }

.switcher__name {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--ash);
  min-width: 5.5rem;
}

/* 滚动提示 */
.hero__scroll {
  position: absolute;
  bottom: 1.4rem;
  right: var(--gutter);
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--ash);
  writing-mode: vertical-rl;
  display: flex;
  align-items: center;
  gap: 0.8rem;
}
.hero__scroll::after {
  content: "";
  width: 1px;
  height: 46px;
  background: linear-gradient(var(--ash), transparent);
}

@media (max-width: 860px) {
  .hero__grid { grid-template-columns: 1fr; gap: 0; }
  .hero { min-height: auto; padding-block: 6rem 2rem; }
  .hero__copy { order: 1; }
  .stage { order: 2; flex-direction: column; min-height: auto; margin-top: 1.5rem; }
  .stage__shots { height: 52svh; max-height: 460px; width: 100%; }
  .hero__scroll { display: none; }
  .switcher { position: static; transform: none; margin-top: 1.5rem; justify-content: center; }
}

/* ==========================================================================
   统计带
   ========================================================================== */
.stats {
  border-block: 1px solid var(--line);
}
.stats__grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
}
.stat {
  padding: clamp(2rem, 5vw, 3.2rem) clamp(1rem, 3vw, 2rem);
  border-left: 1px solid var(--line);
}
.stat:first-child { border-left: none; }
.stat__num {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: clamp(1.9rem, 1.2rem + 2.6vw, 3rem);
  letter-spacing: -0.02em;
  line-height: 1;
}
.stat__num span { color: var(--accent); transition: color 0.6s var(--ease); }
.stat__label {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--ash);
  margin-top: 0.8rem;
}
@media (max-width: 720px) {
  .stats__grid { grid-template-columns: 1fr 1fr; }
  .stat:nth-child(3) { border-left: none; }
  .stat:nth-child(odd) { border-left: none; }
  .stat:nth-child(n + 3) { border-top: 1px solid var(--line); }
}

/* ==========================================================================
   章节通用：标题块
   ========================================================================== */
.section-head { max-width: 46rem; }
.section-head .h2 { margin-top: 1.1rem; }
.section-head .lead { margin-top: 1.4rem; }

/* ==========================================================================
   技术
   ========================================================================== */
.principles {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: clamp(1.5rem, 4vw, 3rem);
  margin-top: clamp(2.5rem, 6vw, 4.5rem);
  border-top: 1px solid var(--line);
  padding-top: clamp(2rem, 4vw, 3rem);
}
.principle__tag {
  font-family: var(--font-mono);
  font-size: 0.74rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--accent);
  transition: color 0.6s var(--ease);
}
.principle h3 {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 1.5rem;
  letter-spacing: -0.01em;
  margin-block: 0.7rem 0.6rem;
}
.principle p { color: var(--ink-soft); font-size: 0.98rem; }
@media (max-width: 720px) {
  .principles { grid-template-columns: 1fr; gap: 2rem; }
}

/* ==========================================================================
   工作流程（有序步骤，编号合理）
   ========================================================================== */
.steps {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: clamp(1.5rem, 4vw, 3rem);
  margin-top: clamp(2.5rem, 6vw, 4rem);
}
.step { position: relative; }
.step__no {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  letter-spacing: 0.1em;
  color: var(--accent);
  transition: color 0.6s var(--ease);
}
.step h3 {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 1.45rem;
  letter-spacing: -0.01em;
  margin-block: 1rem 0.6rem;
  padding-top: 1rem;
  border-top: 1px solid var(--line);
}
.step p { color: var(--ink-soft); font-size: 0.98rem; }
@media (max-width: 720px) {
  .steps { grid-template-columns: 1fr; gap: 1.8rem; }
}

/* ==========================================================================
   配色 / 工艺
   ========================================================================== */
.finishes { background: var(--paper-raised); border-block: 1px solid var(--line); }
.finish-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: clamp(1.2rem, 3vw, 2.2rem);
  margin-top: clamp(2.5rem, 6vw, 4rem);
}
.finish {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  padding: clamp(1.5rem, 3vw, 2.5rem) 1rem 2rem;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--paper);
  transition: transform 0.5s var(--ease), box-shadow 0.5s var(--ease);
}
.finish:hover {
  transform: translateY(-6px);
  box-shadow: 0 26px 50px -28px rgba(20, 22, 26, 0.5);
}
.finish__img-wrap {
  position: relative;
  height: clamp(240px, 34vw, 380px);
  display: flex;
  align-items: center;
  justify-content: center;
}
.finish__glow {
  position: absolute;
  inset: 0;
  margin: auto;
  width: 70%;
  aspect-ratio: 1;
  border-radius: 50%;
  filter: blur(26px);
  opacity: 0.55;
}
.finish--amber   .finish__glow { background: radial-gradient(circle, rgba(192,85,31,0.45), transparent 66%); }
.finish--glacier .finish__glow { background: radial-gradient(circle, rgba(92,127,158,0.5), transparent 66%); }
.finish--iris    .finish__glow { background: radial-gradient(circle, rgba(140,114,164,0.5), transparent 66%); }
.finish__img {
  position: relative;
  height: 100%;
  width: auto;
  object-fit: contain;
  border-radius: 10px;
  filter: drop-shadow(0 20px 28px rgba(20, 22, 26, 0.18));
}
.finish__name {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 1.5rem;
  margin-top: 1.6rem;
}
.finish__code {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--ash);
  margin-top: 0.4rem;
}
.finish__desc { color: var(--ink-soft); font-size: 0.95rem; margin-top: 1rem; max-width: 18rem; }
@media (max-width: 820px) {
  .finish-grid { grid-template-columns: 1fr; max-width: 26rem; margin-inline: auto; }
}

/* ==========================================================================
   App / 智能控制（深色）
   ========================================================================== */
.app {
  background: var(--night);
  color: var(--paper);
}
.app .eyebrow { color: var(--accent); }
.app .h2 { color: #fff; }
.app__grid {
  display: grid;
  grid-template-columns: 0.9fr 1.1fr;
  gap: clamp(2rem, 6vw, 5rem);
  align-items: start;
}
.app__intro .lead { color: var(--night-ash); margin-top: 1.4rem; }

/* App 下载徽标（当前为占位，不可点击） */
.download { margin-top: 2.4rem; }
.download__badges { display: flex; flex-wrap: wrap; gap: 0.9rem; }
.store-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.7rem;
  padding: 0.65rem 1.2rem;
  border: 1px solid var(--night-line);
  border-radius: 14px;
  background: var(--night-raised);
  color: var(--paper);
  cursor: not-allowed;
  user-select: none;
  opacity: 0.7;
  transition: opacity 0.3s var(--ease), border-color 0.3s var(--ease),
    transform 0.3s var(--ease);
}
.store-badge:hover { opacity: 0.85; border-color: rgba(255, 255, 255, 0.26); }

/* APK 直接下载：当前可用的真实入口 */
.store-badge--active { cursor: pointer; opacity: 1; border-color: rgba(255, 255, 255, 0.2); }
.store-badge--active:hover { opacity: 1; transform: translateY(-2px); border-color: var(--accent); }
.store-badge__logo { width: 26px; height: 26px; flex: none; }
.store-badge__text {
  display: flex;
  flex-direction: column;
  line-height: 1.12;
  text-align: left;
}
.store-badge__text small {
  font-size: 0.6rem;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: var(--night-ash);
}
.store-badge__text strong {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 1.06rem;
  letter-spacing: -0.01em;
}
.download__status {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  margin-top: 1.2rem;
  font-family: var(--font-mono);
  font-size: 0.74rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--night-ash);
}
.download__dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--accent);
  transition: background 0.6s var(--ease);
  animation: status-pulse 2.4s ease-in-out infinite;
}
@keyframes status-pulse {
  0%, 100% { box-shadow: 0 0 0 0 rgba(var(--accent-rgb), 0.5); }
  50% { box-shadow: 0 0 0 6px rgba(var(--accent-rgb), 0); }
}
.feature-list { display: grid; gap: 0; }
.feature {
  display: grid;
  grid-template-columns: 8.5rem 1fr;
  gap: 1.5rem;
  padding-block: 1.4rem;
  border-top: 1px solid var(--night-line);
}
.feature:last-child { border-bottom: 1px solid var(--night-line); }
.feature__tag {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--accent);
  transition: color 0.6s var(--ease);
  padding-top: 0.15rem;
}
.feature__body h3 {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 1.2rem;
  margin-bottom: 0.35rem;
}
.feature__body p { color: var(--night-ash); font-size: 0.95rem; }
@media (max-width: 820px) {
  .app__grid { grid-template-columns: 1fr; }
  .feature { grid-template-columns: 1fr; gap: 0.4rem; }
}

/* ==========================================================================
   规格表
   ========================================================================== */
.specs__grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 0 clamp(2rem, 6vw, 5rem);
  margin-top: clamp(2rem, 5vw, 3.5rem);
}
.spec {
  display: grid;
  grid-template-columns: 0.8fr 1.2fr;
  gap: 1rem;
  padding-block: 1.05rem;
  border-top: 1px solid var(--line);
  align-items: baseline;
}
.spec__key {
  font-family: var(--font-mono);
  font-size: 0.74rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--ash);
}
.spec__val { color: var(--ink); font-size: 0.98rem; }
@media (max-width: 720px) {
  .specs__grid { grid-template-columns: 1fr; gap: 0; }
}

/* ==========================================================================
   公司
   ========================================================================== */
.company__grid {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: clamp(2rem, 6vw, 5rem);
  align-items: center;
}
.company__body p { color: var(--ink-soft); margin-top: 1.4rem; max-width: 34rem; }
.company__body p b { color: var(--ink); font-weight: 600; }
.credentials {
  display: grid;
  gap: 0;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--paper-raised);
}
.credential {
  padding: 1.3rem 1.6rem;
  border-top: 1px solid var(--line);
}
.credential:first-child { border-top: none; }
.credential__k {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--ash);
}
.credential__v {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 1.15rem;
  margin-top: 0.4rem;
}
@media (max-width: 820px) {
  .company__grid { grid-template-columns: 1fr; }
}

/* ==========================================================================
   收尾 CTA
   ========================================================================== */
.cta {
  text-align: center;
  background: var(--night);
  color: var(--paper);
  position: relative;
  overflow: hidden;
}
.cta::before {
  content: "";
  position: absolute;
  inset: auto 0 -40% 0;
  height: 80%;
  background: radial-gradient(60% 100% at 50% 100%, rgba(var(--accent-rgb), 0.3), transparent 70%);
  transition: background 0.7s var(--ease);
}
.cta__inner { position: relative; max-width: 40rem; margin-inline: auto; }
.cta .h2 { color: #fff; }
.cta__sub { color: var(--night-ash); margin-top: 1.2rem; font-size: 1.1rem; }
.cta__actions { margin-top: 2.4rem; display: flex; justify-content: center; gap: 1rem; flex-wrap: wrap; }

/* ==========================================================================
   页脚
   ========================================================================== */
.footer {
  background: var(--paper);
  border-top: 1px solid var(--line);
  padding-block: clamp(3rem, 6vw, 4.5rem) 2.5rem;
}
.footer__top {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr 1fr;
  gap: 2rem;
}
.footer__brand .brand { font-size: 1.6rem; margin-bottom: 1rem; }
.footer__tag { color: var(--ash); max-width: 16rem; font-size: 0.95rem; }
.footer__col h4 {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--ash);
  margin: 0 0 1.1rem;
  font-weight: 500;
}
.footer__col a {
  display: block;
  color: var(--ink-soft);
  font-size: 0.95rem;
  padding-block: 0.35rem;
  transition: color 0.3s var(--ease);
}
.footer__col a:hover { color: var(--accent); }
.footer__legal {
  margin-top: clamp(2.5rem, 5vw, 3.5rem);
  padding-top: 1.8rem;
  border-top: 1px solid var(--line);
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem 2rem;
  justify-content: space-between;
  font-size: 0.82rem;
  color: var(--ash);
}
.footer__legal p { max-width: 52rem; }
@media (max-width: 820px) {
  .footer__top { grid-template-columns: 1fr 1fr; gap: 2.2rem; }
  .footer__brand { grid-column: 1 / -1; }
}

/* --- 进入动画（滚动揭示） ----------------------------------------------- */
.reveal {
  opacity: 0;
  transform: translateY(22px);
  transition: opacity 0.8s var(--ease), transform 0.8s var(--ease);
}
.reveal.is-in { opacity: 1; transform: none; }

@media (prefers-reduced-motion: reduce) {
  .reveal { opacity: 1; transform: none; transition: none; }
  .stage__halo, .cta::before, .download__dot { animation: none; }
  .stage__shot { transition: opacity 0.3s linear; }
}