/* ---------------------------------------------------------------
   PCL Tools 官网样式
   --------------------------------------------------------------- */

:root {
  --bg: #f7f8fb;
  --bg-soft: #eef1f7;
  --elev: #ffffff;
  --text: #10131a;
  --text-soft: #5b6472;
  --text-dim: #8a93a3;
  --line: #e5e8f0;
  --line-strong: #d4d9e4;
  --brand: #2f6bff;
  --brand-soft: #e8efff;
  --brand-ink: #1948c4;
  --accent: #ff8a3d;
  --shadow-s: 0 1px 2px rgba(16, 20, 30, .06), 0 6px 18px -8px rgba(16, 20, 30, .12);
  --shadow-m: 0 2px 4px rgba(16, 20, 30, .05), 0 18px 40px -18px rgba(16, 20, 30, .22);
  --ring: 0 0 0 1px var(--line);
  --radius: 22px;
  --radius-s: 14px;
  --maxw: 1120px;
}

@media (prefers-color-scheme: dark) {
  :root[data-theme="auto"] {
    --bg: #0b0d12;
    --bg-soft: #0f1219;
    --elev: #13161f;
    --text: #eef1f7;
    --text-soft: #9aa4b5;
    --text-dim: #6d7789;
    --line: #232838;
    --line-strong: #2e3446;
    --brand: #7aa2ff;
    --brand-soft: #182239;
    --brand-ink: #b9cdff;
    --accent: #ffa565;
    --shadow-s: 0 1px 2px rgba(0, 0, 0, .5), 0 6px 18px -8px rgba(0, 0, 0, .6);
    --shadow-m: 0 2px 4px rgba(0, 0, 0, .45), 0 22px 48px -20px rgba(0, 0, 0, .8);
  }
}

:root[data-theme="dark"] {
  --bg: #0b0d12;
  --bg-soft: #0f1219;
  --elev: #13161f;
  --text: #eef1f7;
  --text-soft: #9aa4b5;
  --text-dim: #6d7789;
  --line: #232838;
  --line-strong: #2e3446;
  --brand: #7aa2ff;
  --brand-soft: #182239;
  --brand-ink: #b9cdff;
  --accent: #ffa565;
  --shadow-s: 0 1px 2px rgba(0, 0, 0, .5), 0 6px 18px -8px rgba(0, 0, 0, .6);
  --shadow-m: 0 2px 4px rgba(0, 0, 0, .45), 0 22px 48px -20px rgba(0, 0, 0, .8);
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Source Han Sans SC", sans-serif;
  font-size: 16px;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

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

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

h1, h2, h3, h4 { margin: 0; line-height: 1.25; letter-spacing: -.02em; font-weight: 700; }

p { margin: 0; }

::selection { background: color-mix(in srgb, var(--brand) 26%, transparent); }

/* 顶部滚动进度条 ------------------------------ */
.scrollbar {
  position: fixed; inset: 0 0 auto 0; height: 3px; z-index: 60;
  background: transparent; pointer-events: none;
}
.scrollbar__fill {
  height: 100%; width: 0%;
  background: linear-gradient(90deg, var(--brand), var(--accent));
  transition: width .08s linear;
}

/* 导航 ---------------------------------------- */
.nav {
  position: fixed; top: 3px; left: 0; right: 0; z-index: 50;
  display: flex; align-items: center; gap: 22px;
  max-width: var(--maxw); margin: 0 auto; padding: 14px 26px;
  transition: background .35s ease, box-shadow .35s ease, backdrop-filter .35s ease, border-color .35s ease;
  border-radius: 0 0 22px 22px;
  border: 1px solid transparent;
}
.nav.is-stuck {
  background: color-mix(in srgb, var(--elev) 78%, transparent);
  backdrop-filter: saturate(160%) blur(14px);
  -webkit-backdrop-filter: saturate(160%) blur(14px);
  border-color: var(--line);
  border-top-color: transparent;
  box-shadow: var(--shadow-s);
  padding-top: 10px; padding-bottom: 10px;
}
.nav__brand { display: flex; align-items: center; gap: 10px; font-weight: 700; letter-spacing: -.01em; }
.nav__brand img { border-radius: 9px; }
.nav__links { display: flex; gap: 4px; margin-left: 8px; }
.nav__links a {
  padding: 6px 12px; border-radius: 999px; font-size: 14.5px; color: var(--text-soft);
  transition: color .2s, background .2s;
}
.nav__links a:hover { color: var(--text); background: var(--bg-soft); }
.nav__actions { margin-left: auto; display: flex; align-items: center; gap: 10px; }

.theme-toggle {
  width: 36px; height: 36px; border-radius: 999px; display: grid; place-items: center;
  border: 1px solid var(--line); background: var(--elev); color: var(--text-soft);
  cursor: pointer; transition: transform .2s, color .2s, border-color .2s, background .2s;
}
.theme-toggle:hover { color: var(--brand); border-color: var(--brand); transform: rotate(-12deg); }
.theme-toggle svg { grid-area: 1 / 1; fill: currentColor; stroke: none; }
.theme-toggle .icon-sun g { stroke: currentColor; fill: none; }
.theme-toggle .icon-moon { display: none; fill: currentColor; }
:root[data-theme="dark"] .theme-toggle .icon-sun { display: none; }
:root[data-theme="dark"] .theme-toggle .icon-moon { display: block; }
@media (prefers-color-scheme: dark) {
  :root[data-theme="auto"] .theme-toggle .icon-sun { display: none; }
  :root[data-theme="auto"] .theme-toggle .icon-moon { display: block; }
}

/* 按钮 ---------------------------------------- */
.btn {
  position: relative; display: inline-flex; align-items: center; gap: 9px;
  padding: 11px 20px; border-radius: 999px; border: 1px solid transparent;
  font-size: 15px; font-weight: 600; letter-spacing: -.01em; cursor: pointer;
  color: #fff; background: linear-gradient(135deg, #3a74ff, #2f5fe0);
  box-shadow: 0 8px 20px -8px color-mix(in srgb, var(--brand) 70%, transparent);
  overflow: hidden; transition: transform .22s cubic-bezier(.22,.61,.36,1), box-shadow .22s, filter .22s;
}
.btn::after {
  content: ""; position: absolute; inset: 0;
  background: linear-gradient(105deg, transparent 35%, rgba(255,255,255,.35) 50%, transparent 65%);
  transform: translateX(-120%); transition: transform .7s ease;
}
.btn:hover { transform: translateY(-2px); box-shadow: 0 14px 30px -10px color-mix(in srgb, var(--brand) 80%, transparent); }
.btn:hover::after { transform: translateX(120%); }
.btn:active { transform: translateY(0) scale(.99); }
.btn--sm { padding: 8px 16px; font-size: 14px; }
.btn--lg { padding: 14px 26px; font-size: 16px; }
.btn--ghost {
  color: var(--text); background: var(--elev); border-color: var(--line);
  box-shadow: var(--shadow-s);
}
.btn--ghost:hover { border-color: var(--brand); color: var(--brand-ink); box-shadow: var(--shadow-m); }
.btn--full { width: 100%; justify-content: center; }

/* Hero ---------------------------------------- */
.hero {
  position: relative; overflow: hidden;
  padding: 168px 26px 96px;
  text-align: center;
  isolation: isolate;
}
.hero__inner { position: relative; z-index: 2; max-width: 760px; margin: 0 auto; }
.hero__glow {
  position: absolute; border-radius: 50%; filter: blur(70px); opacity: .55; z-index: 0;
  will-change: transform;
}
.hero__glow--a {
  width: 620px; height: 620px; left: -140px; top: -180px;
  background: radial-gradient(circle at 40% 40%, #4d7dff, transparent 68%);
  animation: drift-a 26s ease-in-out infinite alternate;
}
.hero__glow--b {
  width: 560px; height: 560px; right: -120px; top: -60px;
  background: radial-gradient(circle at 60% 40%, #ff9a55, transparent 66%);
  opacity: .38;
  animation: drift-b 32s ease-in-out infinite alternate;
}
.hero__grid {
  position: absolute; inset: 0; z-index: 0;
  background-image:
    linear-gradient(to right, color-mix(in srgb, var(--line-strong) 55%, transparent) 1px, transparent 1px),
    linear-gradient(to bottom, color-mix(in srgb, var(--line-strong) 55%, transparent) 1px, transparent 1px);
  background-size: 64px 64px;
  mask-image: radial-gradient(ellipse 70% 60% at 50% 20%, #000 20%, transparent 78%);
  -webkit-mask-image: radial-gradient(ellipse 70% 60% at 50% 20%, #000 20%, transparent 78%);
  opacity: .7;
}
@keyframes drift-a {
  from { transform: translate3d(0, 0, 0) scale(1); }
  to   { transform: translate3d(120px, 60px, 0) scale(1.12); }
}
@keyframes drift-b {
  from { transform: translate3d(0, 0, 0) scale(1.05); }
  to   { transform: translate3d(-90px, 70px, 0) scale(1); }
}

.hero__logo {
  width: 112px; height: 112px; margin: 0 auto 22px;
  filter: drop-shadow(0 18px 30px rgba(47, 107, 255, .28));
}
.hero__logo img { width: 100%; height: 100%; }
.hero__title {
  font-size: clamp(44px, 7.4vw, 76px);
  letter-spacing: -.035em;
  background: linear-gradient(180deg, var(--text), color-mix(in srgb, var(--text) 62%, var(--text-soft)));
  -webkit-background-clip: text; background-clip: text; color: transparent;
}
.hero__lead {
  margin: 18px auto 0; max-width: 560px;
  font-size: clamp(15.5px, 1.6vw, 18px);
  color: var(--text-soft);
}
.hero__cta { margin-top: 32px; display: flex; gap: 12px; justify-content: center; flex-wrap: wrap; }
.hero__meta { margin-top: 20px; font-size: 13.5px; color: var(--text-dim); letter-spacing: .01em; }

/* 进场动画 ------------------------------------ */
.rise { animation: rise .85s cubic-bezier(.22,.61,.36,1) both; animation-delay: var(--d, 0ms); }
@keyframes rise {
  from { opacity: 0; transform: translateY(18px); }
  to   { opacity: 1; transform: none; }
}

.reveal {
  opacity: 0; transform: translateY(22px);
  transition: opacity .75s cubic-bezier(.22,.61,.36,1), transform .75s cubic-bezier(.22,.61,.36,1);
  transition-delay: var(--d, 0ms);
}
.reveal.is-in { opacity: 1; transform: none; }

/* 统计条 -------------------------------------- */
.stats {
  max-width: var(--maxw); margin: -8px auto 0; padding: 0 26px;
  display: grid; grid-template-columns: repeat(4, 1fr); gap: 14px;
}
.stats__item {
  background: var(--elev); border: 1px solid var(--line); border-radius: var(--radius-s);
  padding: 18px 20px; box-shadow: var(--shadow-s);
}
.stats__item b {
  display: block; font-size: 30px; letter-spacing: -.03em; line-height: 1.1;
  color: var(--brand);
  font-variant-numeric: tabular-nums;
}
.stats__item span { display: block; margin-top: 6px; font-size: 13.5px; color: var(--text-soft); }

/* 区块 ---------------------------------------- */
.section { max-width: var(--maxw); margin: 0 auto; padding: 96px 26px 0; }
.section__head { max-width: 640px; }
.eyebrow {
  font-size: 13px; font-weight: 600; letter-spacing: .12em; text-transform: uppercase;
  color: var(--brand); margin-bottom: 10px;
}
.section__head h2 { font-size: clamp(28px, 3.6vw, 40px); }
.section__sub { margin-top: 12px; color: var(--text-soft); font-size: 16px; }

/* 功能卡片 ------------------------------------ */
.cards {
  margin-top: 40px; display: grid; gap: 18px;
  grid-template-columns: repeat(2, 1fr);
}
.card {
  position: relative; background: var(--elev); border: 1px solid var(--line);
  border-radius: var(--radius); padding: 26px 26px 22px;
  box-shadow: var(--shadow-s);
  transition: transform .35s cubic-bezier(.22,.61,.36,1), box-shadow .35s, border-color .35s;
  overflow: hidden;
}
.card::before {
  content: ""; position: absolute; inset: 0 0 auto 0; height: 1px;
  background: linear-gradient(90deg, transparent, color-mix(in srgb, var(--brand) 55%, transparent), transparent);
  opacity: 0; transition: opacity .35s;
}
.card:hover { transform: translateY(-5px); box-shadow: var(--shadow-m); border-color: var(--line-strong); }
.card:hover::before { opacity: 1; }
.card__icon {
  width: 44px; height: 44px; border-radius: 13px; display: grid; place-items: center;
  margin-bottom: 16px;
}
.card__icon--blue { background: var(--brand-soft); color: var(--brand-ink); }
.card__icon--violet { background: color-mix(in srgb, #8b5cf6 14%, transparent); color: #7c5cf6; }
.card__icon--green { background: color-mix(in srgb, #10b981 14%, transparent); color: #0f9d6e; }
.card__icon--amber { background: color-mix(in srgb, var(--accent) 16%, transparent); color: #e07a2e; }
.card h3 { font-size: 19px; }
.card p { margin-top: 10px; color: var(--text-soft); font-size: 14.8px; line-height: 1.72; }
.card__foot {
  margin-top: 16px !important; padding-top: 14px; border-top: 1px dashed var(--line);
  font-size: 13px !important; color: var(--text-dim) !important;
}

/* 截图 ---------------------------------------- */
.shots { margin-top: 40px; display: grid; gap: 22px; }
.shot {
  margin: 0; background: var(--elev); border: 1px solid var(--line);
  border-radius: var(--radius); overflow: hidden; box-shadow: var(--shadow-s);
  transition: transform .4s cubic-bezier(.22,.61,.36,1), box-shadow .4s;
}
.shot:hover { transform: translateY(-4px); box-shadow: var(--shadow-m); }
.shot img { width: 100%; height: auto; display: block; }
.shot figcaption {
  padding: 12px 18px; font-size: 13px; color: var(--text-dim);
  border-top: 1px solid var(--line);
}

/* 更新日志 ------------------------------------ */
.log { list-style: none; margin: 40px 0 0; padding: 0; display: grid; gap: 16px; }
.log__item {
  background: var(--elev); border: 1px solid var(--line); border-radius: var(--radius-s);
  padding: 20px 24px; box-shadow: var(--shadow-s);
}
.log__meta { display: flex; align-items: center; gap: 14px; margin-bottom: 8px; flex-wrap: wrap; }
.log__meta time { font-size: 13px; color: var(--text-dim); font-variant-numeric: tabular-nums; }
.log__meta b { font-size: 17px; letter-spacing: -.01em; }
.tag {
  font-size: 11.5px; font-weight: 600; padding: 2px 9px; border-radius: 999px;
  letter-spacing: .02em;
}
.tag--new { color: #fff; background: linear-gradient(135deg, #3a74ff, #2f5fe0); }
.log ul { margin: 0; padding-left: 18px; color: var(--text-soft); font-size: 14.8px; }
.log li { margin: 4px 0; }
.log li::marker { color: var(--brand); }

/* 下载 ---------------------------------------- */
.download {
  display: flex; align-items: center; gap: 28px; flex-wrap: wrap;
  background:
    radial-gradient(120% 160% at 0% 0%, color-mix(in srgb, var(--brand) 12%, transparent), transparent 60%),
    var(--elev);
  border: 1px solid var(--line); border-radius: var(--radius);
  padding: 30px 32px; box-shadow: var(--shadow-m);
}
.download__left { display: flex; align-items: center; gap: 20px; flex: 1 1 320px; min-width: 0; }
.download__left img { border-radius: 18px; box-shadow: 0 14px 26px -14px rgba(47,107,255,.6); }
.download__left h2 { font-size: 26px; }
.download__left p { margin-top: 8px; color: var(--text-soft); font-size: 14.5px; }
.download__right { flex: 0 1 300px; min-width: 0; }
.download__file {
  margin-top: 8px; text-align: center; font-size: 12.5px; color: var(--text-dim);
  font-family: ui-monospace, SFMono-Regular, "SF Mono", Consolas, monospace;
}

.fineprint {
  margin-top: 18px; display: grid; gap: 22px; grid-template-columns: repeat(3, 1fr);
  background: var(--bg-soft); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 24px 26px;
}
.fineprint h4 { font-size: 13px; letter-spacing: .06em; text-transform: uppercase; color: var(--text-dim); }
.fineprint p { margin-top: 8px; font-size: 14px; color: var(--text-soft); }
.hash {
  display: block; margin-top: 10px; font-size: 11.5px; line-height: 1.6;
  font-family: ui-monospace, SFMono-Regular, "SF Mono", Consolas, monospace;
  color: var(--text-soft); word-break: break-all;
}
.copy {
  margin-top: 8px; font-size: 12px; padding: 3px 10px; border-radius: 999px;
  border: 1px solid var(--line-strong); background: var(--elev); color: var(--text-soft);
  cursor: pointer; transition: color .2s, border-color .2s;
}
.copy:hover { color: var(--brand); border-color: var(--brand); }

/* 页脚 ---------------------------------------- */
.footer {
  margin-top: 96px; border-top: 1px solid var(--line); background: var(--bg-soft);
}
.footer__inner {
  max-width: var(--maxw); margin: 0 auto; padding: 34px 26px 44px;
  color: var(--text-soft); font-size: 14px;
}
.footer__brand { display: flex; align-items: center; gap: 9px; font-weight: 700; color: var(--text); margin-bottom: 10px; }
.footer__brand img { border-radius: 7px; }
.footer__small { margin-top: 6px; font-size: 12.5px; color: var(--text-dim); }

/* 响应式 -------------------------------------- */
@media (max-width: 900px) {
  .cards { grid-template-columns: 1fr; }
  .stats { grid-template-columns: repeat(2, 1fr); }
  .fineprint { grid-template-columns: 1fr; }
  .nav__links { display: none; }
}
@media (max-width: 700px) {
  .download { flex-direction: column; align-items: stretch; }
  .download__right { flex: 0 0 auto; }
}

@media (max-width: 560px) {
  .hero { padding-top: 132px; }
  .hero__lead br { display: none; }
  .hero__cta .btn { width: 100%; justify-content: center; }
  .stats { grid-template-columns: 1fr; }
  .section { padding: 72px 18px 0; }
  .download { padding: 24px 20px; }
  .nav { padding: 12px 16px; }
}

/* 减少动效偏好 -------------------------------- */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .rise, .reveal { animation: none !important; opacity: 1 !important; transform: none !important; transition: none !important; }
  .hero__glow { animation: none !important; }
  .btn::after { display: none; }
}

/* 静态模式（?static=1）：跳过所有进场动效 */
:root[data-static] .rise,
:root[data-static] .reveal {
  animation: none !important;
  opacity: 1 !important;
  transform: none !important;
  transition: none !important;
}