/* ═══════════════════════════════════════════════════════════
   我的工具箱 · 样式表
   设计语言参考 apple.com：超大字号 / 紧凑字距 / 黑白分区 /
   大留白 / 克制的蓝色点缀 / 滚动渐入。
   想换配色改 :root 变量即可。
   ═══════════════════════════════════════════════════════════ */

:root {
  /* 配色 */
  --black: #000;
  --ink: #f5f5f7;          /* 暗色区主文字 */
  --gray: #86868b;         /* 次级文字 */
  --gray-dim: #6e6e73;
  --light: #f5f5f7;        /* 亮色区背景 */
  --light-ink: #1d1d1f;    /* 亮色区主文字 */
  --blue: #0071e3;         /* 行动蓝 */
  --blue-hover: #0077ed;

  /* 排版 */
  --font: "SF Pro Display", -apple-system, BlinkMacSystemFont, "Segoe UI",
          "PingFang SC", "Microsoft YaHei", "Helvetica Neue", sans-serif;

  /* 动效 */
  --ease: cubic-bezier(.16, 1, .3, 1);
}

* { margin: 0; padding: 0; box-sizing: border-box; }

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

body {
  background: var(--black);
  color: var(--ink);
  font-family: var(--font);
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }

/* 锚点跳转时给固定导航栏留出空间 */
section[id], main[id] { scroll-margin-top: 72px; }

.wrap {
  max-width: 980px;
  margin: 0 auto;
  padding: 0 24px;
}

/* ═══════════ 滚动渐入 ═══════════ */
.reveal {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity .9s var(--ease), transform .9s var(--ease);
  transition-delay: var(--d, 0s);
}
.reveal.in { opacity: 1; transform: none; }

/* ═══════════ 导航 ═══════════ */
.nav {
  position: fixed;
  inset: 0 0 auto 0;
  z-index: 100;
  height: 48px;
  background: rgba(0, 0, 0, .72);
  backdrop-filter: saturate(180%) blur(20px);
  -webkit-backdrop-filter: saturate(180%) blur(20px);
  border-bottom: 1px solid rgba(255, 255, 255, .08);
  transition: background .3s;
}
.nav.scrolled { background: rgba(0, 0, 0, .9); }
.nav-in {
  max-width: 980px;
  margin: 0 auto;
  height: 100%;
  padding: 0 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.nav-brand { font-size: 15px; font-weight: 600; letter-spacing: -.01em; }
.nav-links { display: flex; gap: 30px; }
.nav-links a {
  font-size: 12px;
  color: rgba(245, 245, 247, .82);
  transition: color .25s;
}
.nav-links a:hover { color: #fff; }

/* ═══════════ 通用排版 ═══════════ */
.eyebrow {
  font-size: 13px;
  font-weight: 600;
  letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--gray);
  margin-bottom: 18px;
}
.lede {
  font-size: clamp(17px, 1.7vw, 21px);
  color: var(--gray);
  line-height: 1.55;
  margin-top: 22px;
}
.body-text {
  font-size: clamp(16px, 1.5vw, 19px);
  color: var(--gray);
  line-height: 1.65;
  margin-top: 20px;
}
.body-text.big { font-size: clamp(19px, 2.3vw, 26px); }

.cta-row {
  margin-top: 34px;
  display: flex;
  align-items: center;
  gap: 28px;
  flex-wrap: wrap;
}
.link-arrow {
  color: var(--blue);
  font-size: 17px;
  font-weight: 500;
  transition: color .2s;
}
.link-arrow::after { content: " ›"; }
.link-arrow:hover { color: var(--blue-hover); text-decoration: underline; }
.link-arrow.small { font-size: 15px; }

.btn-pill {
  display: inline-block;
  background: var(--blue);
  color: #fff;
  font-size: 15px;
  font-weight: 500;
  padding: 11px 24px;
  border-radius: 980px;
  transition: background .2s, transform .2s;
}
.btn-pill:hover { background: var(--blue-hover); transform: translateY(-1px); }

/* ═══════════ 首屏 ═══════════ */
.hero {
  padding: 150px 0 60px;
  text-align: center;
}
.hero h1 {
  font-size: clamp(40px, 7.4vw, 104px);
  font-weight: 700;
  letter-spacing: -.028em;
  line-height: 1.04;
  background: linear-gradient(180deg, #fff 30%, #a7a7ad);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}
.hero .cta-row {
  justify-content: center;
  gap: 34px;
}

.hero-visual {
  max-width: 1120px;
  margin: 64px auto 0;
  padding: 0 22px;
}
.hero-visual img,
.shot img {
  width: 100%;
  border-radius: 18px;
  border: 1px solid rgba(255, 255, 255, .1);
  box-shadow: 0 40px 100px rgba(0, 0, 0, .7);
}
.hero-visual img {
  box-shadow: 0 40px 120px rgba(79, 140, 255, .18),
              0 40px 100px rgba(0, 0, 0, .7);
}

/* ═══════════ 主打作品 ═══════════ */
.spotlight {
  padding: 130px 0 110px;
  text-align: center;
}
.giant {
  font-size: clamp(58px, 12vw, 168px);
  font-weight: 700;
  letter-spacing: -.045em;
  line-height: .92;
}
.tagline {
  font-size: clamp(21px, 3vw, 40px);
  font-weight: 600;
  letter-spacing: -.02em;
  color: var(--gray);
  margin-top: 20px;
}
.spotlight .cta-row { justify-content: center; }

.shot {
  max-width: 1120px;
  margin: 70px auto 0;
  padding: 0 22px;
}
/* 主打区用同一张图的顶部特写，避免和首屏整图重复 */
.shot img {
  height: clamp(260px, 42vw, 470px);
  object-fit: cover;
  object-position: 50% 4%;
}
.shot figcaption {
  margin-top: 18px;
  font-size: 13px;
  color: var(--gray-dim);
}

/* ═══════════ 「开发中」占位（替代作品截图） ═══════════ */
.placeholder {
  aspect-ratio: 16 / 9;
  border-radius: 18px;
  border: 1px dashed rgba(255, 255, 255, .18);
  background:
    radial-gradient(ellipse at 50% 0%, rgba(79, 140, 255, .12), transparent 62%),
    #0a0a0c;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 12px;
  box-shadow: 0 40px 100px rgba(0, 0, 0, .6);
}
.placeholder.wide { aspect-ratio: 16 / 7; }

.dev-dot {
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--blue);
  box-shadow: 0 0 0 0 rgba(0, 113, 227, .5);
  animation: devPulse 2s infinite;
}
@keyframes devPulse {
  0%   { box-shadow: 0 0 0 0 rgba(0, 113, 227, .45); }
  70%  { box-shadow: 0 0 0 15px rgba(0, 113, 227, 0); }
  100% { box-shadow: 0 0 0 0 rgba(0, 113, 227, 0); }
}
.dev-title {
  font-size: clamp(17px, 2.1vw, 25px);
  font-weight: 600;
  letter-spacing: -.01em;
}
.dev-sub {
  font-size: 13px;
  color: var(--gray);
}

/* 亮色区卡片里的开发中占位 */
.mock.mock-dev {
  border: 1px dashed #c7c7cc;
  background: transparent;
  display: flex;
  align-items: center;
  justify-content: center;
}
.dev-badge {
  font-size: 13px;
  font-weight: 600;
  letter-spacing: .1em;
  color: var(--gray-dim);
  background: #fff;
  border: 1px solid #d6d6da;
  border-radius: 980px;
  padding: 6px 18px;
}
.soon {
  display: inline-block;
  margin-top: 16px;
  font-size: 15px;
  font-weight: 500;
  color: #b0b0b5;
}

/* 规格数字 */
.specs {
  list-style: none;
  margin-top: 96px;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 34px 18px;
}
.specs li { text-align: center; }
.specs b {
  display: block;
  font-size: clamp(34px, 4.4vw, 54px);
  font-weight: 700;
  letter-spacing: -.03em;
  line-height: 1.1;
  background: linear-gradient(180deg, #fff, #9a9aa2);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}
.specs b small {
  font-size: .42em;
  font-weight: 600;
  letter-spacing: 0;
  margin-left: 3px;
}
.specs span {
  display: block;
  margin-top: 8px;
  font-size: 13px;
  color: var(--gray);
}

/* ═══════════ 其他作品（亮色区） ═══════════ */
.tiles-section {
  background: var(--light);
  color: var(--light-ink);
  padding: 110px 0 120px;
  text-align: center;
}
.tiles-section .section-title {
  font-size: clamp(32px, 5vw, 64px);
  font-weight: 700;
  letter-spacing: -.03em;
  line-height: 1.08;
}
.section-sub {
  font-size: clamp(16px, 1.6vw, 20px);
  color: var(--gray-dim);
  margin-top: 16px;
}

.tile-grid {
  margin-top: 62px;
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 22px;
}
.tile {
  background: #fff;
  border-radius: 22px;
  padding: 32px 30px 30px;
  text-align: left;
  box-shadow: 0 4px 20px rgba(0, 0, 0, .06);
  transition: transform .45s var(--ease), box-shadow .45s var(--ease);
}
.tile:hover {
  transform: translateY(-8px);
  box-shadow: 0 18px 48px rgba(0, 0, 0, .13);
}
.tile h3 {
  font-size: clamp(21px, 2.1vw, 26px);
  font-weight: 600;
  letter-spacing: -.02em;
  margin-top: 26px;
}
.tile p {
  font-size: 15px;
  line-height: 1.6;
  color: var(--gray-dim);
  margin-top: 10px;
  min-height: 72px;
}
.tile .link-arrow { display: inline-block; margin-top: 16px; }

/* ── 卡片里的示意图形（纯 CSS 画的） ── */
.mock {
  height: 128px;
  border-radius: 14px;
  background: var(--light);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 0 24px;
  overflow: hidden;
}

.mock-player { display: flex; align-items: center; gap: 12px; width: 100%; }
.mock-dot {
  width: 26px; height: 26px; border-radius: 50%;
  background: #1d1d1f; flex: none;
}
.mock-bar {
  flex: 1; height: 6px; border-radius: 3px;
  background: #d6d6d9; overflow: hidden;
}
.mock-bar i { display: block; height: 100%; background: var(--blue); border-radius: 3px; }
.mock-pill {
  flex: none; font-size: 12px; font-weight: 600; color: #fff;
  background: #1d1d1f; padding: 5px 12px; border-radius: 980px;
}

.mock-notif {
  background: #fff; width: 100%; border-radius: 12px; padding: 16px 18px;
  display: flex; align-items: center; gap: 14px;
  box-shadow: 0 6px 20px rgba(0, 0, 0, .08);
}
.mock-bell { font-size: 22px; }
.mock-lines { flex: 1; display: flex; flex-direction: column; gap: 8px; }
.mock-lines i { display: block; height: 8px; border-radius: 4px; background: #e3e3e6; }
.mock-lines i:first-child { background: #c9c9ce; }

.mock-keys { display: flex; gap: 12px; }
.mock-keys span {
  width: 52px; height: 52px; border-radius: 12px; background: #fff;
  display: flex; align-items: center; justify-content: center;
  font-size: 18px; font-weight: 600; color: #1d1d1f;
  box-shadow: 0 4px 12px rgba(0, 0, 0, .1);
}
.mock-keys span:nth-child(3) {
  background: var(--blue); color: #fff;
  box-shadow: 0 6px 18px rgba(0, 113, 227, .35);
}
.mock-keys span.wide { width: 74px; }

.mock-code {
  width: 100%; display: flex; flex-direction: column; gap: 10px;
}
.mock-code span {
  display: block; height: 9px; border-radius: 4px; background: #dcdce0;
}
.mock-code span:nth-child(odd) { background: #c2c2c8; }

/* ═══════════ 关于 ═══════════ */
.about {
  padding: 130px 0 140px;
  text-align: center;
}
.about .section-title {
  font-size: clamp(30px, 4.4vw, 56px);
  font-weight: 700;
  letter-spacing: -.03em;
}
.about .body-text { margin-top: 26px; }

.chips {
  margin-top: 42px;
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  justify-content: center;
}
.chips span {
  font-size: 13px;
  color: var(--gray);
  border: 1px solid rgba(255, 255, 255, .16);
  border-radius: 980px;
  padding: 6px 16px;
}

/* ═══════════ 页脚 ═══════════ */
.footer {
  background: var(--light);
  color: var(--gray-dim);
  padding: 56px 0 46px;
  font-size: 12px;
}
.foot-cols {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 30px;
  padding-bottom: 26px;
  border-bottom: 1px solid #d2d2d7;
}
.foot-cols h4 {
  font-size: 12px;
  font-weight: 600;
  color: var(--light-ink);
  margin-bottom: 12px;
}
.foot-cols a {
  display: block;
  padding: 5px 0;
  color: var(--gray-dim);
  transition: color .2s;
}
.foot-cols a:hover { color: var(--light-ink); text-decoration: underline; }
.legal { padding-top: 22px; line-height: 1.7; }

/* ═══════════ 手机适配 ═══════════ */
@media (max-width: 860px) {
  .hero { padding-top: 120px; }
  .specs { grid-template-columns: repeat(2, 1fr); gap: 40px 16px; }
  .tile-grid { grid-template-columns: 1fr; }
  .tile p { min-height: 0; }
  .foot-cols { grid-template-columns: 1fr 1fr; }
  .nav-links { gap: 18px; }
}
@media (max-width: 560px) {
  .wrap, .nav-in { padding: 0 18px; }
  .nav-brand { font-size: 14px; }
  .nav-links a { font-size: 11px; }
  .nav-links { gap: 13px; }
  .tiles-section, .about, .spotlight { padding-top: 84px; padding-bottom: 84px; }
  .mock { height: 108px; padding: 0 16px; }
  .mock-keys span { width: 42px; height: 42px; font-size: 16px; }
  .mock-keys span.wide { width: 58px; }
}

/* ═══════════ 无障碍：尊重"减少动态效果" ═══════════ */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .reveal { opacity: 1; transform: none; transition: none; }
  .tile, .btn-pill { transition: none; }
  .dev-dot { animation: none; }
}