/* MomentFTP 官网样式 —— 液态玻璃风格，深浅色跟随系统，零外部依赖（系统字体、无 CDN） */

:root {
  color-scheme: dark light;
  --green: #30d158;
  --green-2: #28b44c;
  --green-ink: #062b12;
  --text: #f2f4f8;
  --text-2: rgba(235, 240, 248, .72);
  --text-3: rgba(235, 240, 248, .5);
  --page: #0b0f17;
  --glass-bg: rgba(30, 36, 50, .52);
  --glass-bg-strong: rgba(30, 36, 50, .72);
  --glass-border: rgba(255, 255, 255, .12);
  --glass-hi: rgba(255, 255, 255, .16);
  --shadow: rgba(0, 0, 0, .45);
  --code-bg: rgba(255, 255, 255, .08);
  --frame-bg: #12151d;
  --blob1: rgba(48, 209, 88, .32);
  --blob2: rgba(140, 82, 255, .30);
  --blob3: rgba(10, 132, 255, .26);
  --radius: 22px;
  --font: -apple-system, BlinkMacSystemFont, "SF Pro Text", "PingFang SC", "Hiragino Sans GB", "Helvetica Neue", "Microsoft YaHei", sans-serif;
  --mono: ui-monospace, "SF Mono", Menlo, Consolas, monospace;
}

@media (prefers-color-scheme: light) {
  :root {
    --green: #1fa84a;
    --green-2: #34c759;
    --green-ink: #ffffff;
    --text: #10141c;
    --text-2: rgba(16, 20, 28, .72);
    --text-3: rgba(16, 20, 28, .5);
    --page: #eef1f5;
    --glass-bg: rgba(255, 255, 255, .58);
    --glass-bg-strong: rgba(255, 255, 255, .8);
    --glass-border: rgba(255, 255, 255, .75);
    --glass-hi: rgba(255, 255, 255, .95);
    --shadow: rgba(30, 40, 60, .14);
    --code-bg: rgba(16, 20, 28, .06);
    --frame-bg: #e9ecf1;
    --blob1: rgba(52, 199, 89, .28);
    --blob2: rgba(175, 82, 222, .20);
    --blob3: rgba(0, 122, 255, .18);
  }
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: var(--font);
  font-size: 17px;
  line-height: 1.6;
  color: var(--text);
  background: var(--page);
  -webkit-font-smoothing: antialiased;
  min-height: 100vh;
}
img { max-width: 100%; height: auto; display: block; }
a { color: var(--green); text-decoration: none; }
a:hover { text-decoration: underline; }
code {
  font-family: var(--mono);
  font-size: .86em;
  background: var(--code-bg);
  padding: .12em .4em;
  border-radius: 6px;
  word-break: break-word;
}
h1, h2, h3 { line-height: 1.2; letter-spacing: -.01em; margin: 0 0 .5em; text-wrap: balance; }
h1 { font-size: clamp(34px, 5.4vw, 60px); font-weight: 750; letter-spacing: -.012em; }
h2 { font-size: clamp(24px, 3vw, 34px); font-weight: 700; }
h3 { font-size: 19px; font-weight: 650; }
p { margin: 0 0 1em; }
.muted { color: var(--text-3); }

.skip { position: absolute; left: -999px; top: 8px; }
.skip:focus { left: 12px; z-index: 100; background: var(--glass-bg-strong); padding: 6px 12px; border-radius: 10px; }

/* 背景：柔和彩色光斑，玻璃在其上折射出层次 */
.bg { position: fixed; inset: 0; z-index: -1; overflow: hidden; pointer-events: none; }
.bg i { position: absolute; border-radius: 50%; filter: blur(80px); }
.bg .b1 { width: 60vw; height: 60vw; left: -18vw; top: -22vw; background: var(--blob1); }
.bg .b2 { width: 50vw; height: 50vw; right: -16vw; top: 18vh; background: var(--blob2); }
.bg .b3 { width: 55vw; height: 55vw; left: 20vw; bottom: -30vw; background: var(--blob3); }

/* 液态玻璃 */
.glass {
  background: var(--glass-bg);
  -webkit-backdrop-filter: blur(28px) saturate(180%);
  backdrop-filter: blur(28px) saturate(180%);
  border: 1px solid var(--glass-border);
  box-shadow: inset 0 1px 0 var(--glass-hi), 0 12px 36px -12px var(--shadow);
}

/* 顶栏：悬浮玻璃胶囊 */
.topbar { position: sticky; top: 0; z-index: 10; padding: 14px 20px 0; }
.bar {
  max-width: 1180px; margin: 0 auto;
  display: flex; align-items: center; gap: 18px;
  padding: 8px 10px 8px 16px; border-radius: 999px;
}
.brand { display: flex; align-items: center; gap: 10px; font-weight: 700; color: var(--text); white-space: nowrap; }
.brand:hover { text-decoration: none; }
.brand img { border-radius: 7px; }
.nav { display: flex; gap: 4px; margin-left: auto; }
.nav a, .lang a {
  color: var(--text-2); padding: 6px 12px; border-radius: 999px; font-size: 15px; white-space: nowrap;
}
.nav a:hover, .lang a:hover { color: var(--text); background: var(--code-bg); text-decoration: none; }
.nav a[aria-current="page"] { color: var(--text); background: var(--code-bg); font-weight: 600; }
.lang { display: flex; padding: 3px; border-radius: 999px; background: var(--code-bg); }
.lang a { padding: 4px 11px; font-size: 14px; font-weight: 600; }
.lang a[aria-current="true"] { background: var(--green); color: var(--green-ink); }

main { max-width: 1180px; margin: 0 auto; padding: 0 20px; }

/* 首屏 */
.hero { text-align: center; padding: 64px 0 24px; }
.hero-icon { margin: 0 auto 18px; width: 144px; height: 144px; filter: drop-shadow(0 18px 30px rgba(0, 0, 0, .35)); }
.eyebrow { color: var(--green); font-weight: 650; font-size: 15px; letter-spacing: .02em; margin-bottom: 12px; }
.lead { font-size: clamp(17px, 2vw, 21px); color: var(--text-2); max-width: 760px; margin: 0 auto 28px; }
.cta { display: flex; gap: 12px; justify-content: center; flex-wrap: wrap; }
.btn {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 12px 22px; border-radius: 999px; font-weight: 650; font-size: 16px;
  border: 1px solid transparent; transition: transform .15s ease, box-shadow .15s ease;
}
.btn:hover { text-decoration: none; transform: translateY(-1px); }
.btn .ico { width: 19px; height: 19px; }
.btn.primary {
  color: var(--green-ink);
  background: linear-gradient(180deg, color-mix(in srgb, var(--green) 80%, white), var(--green) 55%, var(--green-2));
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, .45), 0 10px 24px -8px rgba(48, 209, 88, .6);
}
.btn.ghost { color: var(--text); background: var(--glass-bg); border-color: var(--glass-border); box-shadow: inset 0 1px 0 var(--glass-hi); }
.btn.disabled { opacity: .6; cursor: default; }
.btn.disabled:hover { transform: none; }
.meta { color: var(--text-3); font-size: 14px; margin-top: 14px; }

.hero-shot { margin: 48px auto 0; max-width: 1100px; }

/* 截图 */
.shot { margin: 0; }
.shot .frame {
  border-radius: 16px; overflow: hidden;
  border: 1px solid var(--glass-border);
  box-shadow: 0 30px 70px -24px var(--shadow), 0 0 0 1px rgba(0, 0, 0, .12);
  background: var(--glass-bg-strong);
}
.shot img { width: 100%; }
.shot figcaption { color: var(--text-2); font-size: 15px; margin-top: 12px; text-align: center; }

/* 区块 */
.section { padding: 72px 0 0; }
.section > h2 { text-align: center; margin-bottom: 28px; }
.section-note { text-align: center; color: var(--text-3); margin-top: -14px; margin-bottom: 28px; font-size: 15px; }
.section.narrow { max-width: 860px; margin: 0 auto; }

.card { border-radius: var(--radius); padding: 28px; }
.grid.features { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
.feature p { color: var(--text-2); margin: 0; font-size: 16px; }
.ico { width: 22px; height: 22px; flex: none; }
.ico.big {
  width: 44px; height: 44px; padding: 10px; margin-bottom: 14px; border-radius: 13px;
  color: var(--green); background: color-mix(in srgb, var(--green) 16%, transparent);
  box-shadow: inset 0 1px 0 var(--glass-hi);
}

.scenes { list-style: none; padding: 0; margin: 0; display: grid; grid-template-columns: repeat(2, 1fr); gap: 14px; }
.scenes li { border-radius: 18px; padding: 18px 22px; display: flex; flex-direction: column; gap: 4px; }
.scenes span { color: var(--text-2); font-size: 16px; }

.gallery { display: grid; grid-template-columns: repeat(2, 1fr); gap: 40px 28px; align-items: start; }
.gallery .wide { grid-column: 1 / -1; max-width: 1000px; width: 100%; justify-self: center; }
/* 并排的两张统一画框比例，截图完整显示（contain），留白用与截图背景接近的底色 */
.gallery .pair .frame { aspect-ratio: 4 / 3; display: flex; align-items: center; justify-content: center; background: var(--frame-bg); }
.gallery .pair .frame picture, .gallery .pair .frame > img { width: 100%; height: 100%; }
.gallery .pair img { width: 100%; height: 100%; object-fit: contain; }

.two { display: grid; grid-template-columns: 1.4fr 1fr; gap: 18px; padding-bottom: 8px; }
.two .cta { justify-content: flex-start; margin-top: 18px; }
.two .meta { text-align: left; }
.checks, .steps { margin: 0 0 8px; padding-left: 1.3em; color: var(--text-2); }
.checks li::marker { color: var(--green); content: "✓  "; }
.steps { margin-top: 14px; }
.steps li { margin-bottom: 4px; }
.privacy-card p { color: var(--text-2); }
.link { font-weight: 600; }

/* 内页 */
.page-head { text-align: center; padding: 56px 0 0; }
.page-head h1 { font-size: clamp(32px, 4.6vw, 48px); }
.page-head .lead { margin-bottom: 0; }

.faqs { display: flex; flex-direction: column; gap: 10px; }
.faq { border-radius: 18px; padding: 0; }
.faq summary {
  cursor: pointer; list-style: none; padding: 17px 52px 17px 22px; font-weight: 620; position: relative;
}
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after {
  content: ""; position: absolute; right: 22px; top: 50%; width: 9px; height: 9px; margin-top: -7px;
  border-right: 2px solid var(--text-3); border-bottom: 2px solid var(--text-3); transform: rotate(45deg);
  transition: transform .2s ease;
}
.faq[open] summary::after { transform: rotate(225deg); margin-top: -2px; }
.faq .answer { padding: 0 22px 8px; color: var(--text-2); font-size: 16px; }
.faq .answer ul, .faq .answer ol { padding-left: 1.3em; }
.faq .answer li { margin-bottom: 6px; }

.contact { text-align: center; }
.contact .ico.big { margin: 0 auto 14px; }
.email { font-size: 22px; font-weight: 700; }

.prose { padding: 36px 40px; }
.prose > h2 { font-size: 22px; margin-top: 1.6em; text-align: left; margin-bottom: .5em; }
.prose > h2:first-child { margin-top: 0; }
.prose p, .prose li { color: var(--text-2); }
.prose strong { color: var(--text); }
.table-wrap { overflow-x: auto; margin: 0 0 1em; }
table { border-collapse: collapse; width: 100%; font-size: 15px; }
th, td { text-align: left; padding: 10px 12px; border-bottom: 1px solid var(--glass-border); vertical-align: top; }
th { color: var(--text); font-weight: 650; }
td { color: var(--text-2); }

.release header { display: flex; align-items: baseline; gap: 12px; flex-wrap: wrap; margin-bottom: 8px; }
.release header h2 { margin: 0; font-size: 26px; }
.release time { color: var(--text-3); font-size: 15px; margin-left: auto; }
.pill {
  font-size: 13px; font-weight: 650; padding: 3px 10px; border-radius: 999px;
  color: var(--green); background: color-mix(in srgb, var(--green) 16%, transparent);
}
.release h3 { margin-top: 1.4em; font-size: 17px; }
.release ul { color: var(--text-2); padding-left: 1.3em; margin: 0; }
.release li { margin-bottom: 4px; }

.footer {
  max-width: 1180px; margin: 88px auto 0; padding: 28px 20px 48px; text-align: center;
  color: var(--text-3); font-size: 14px; border-top: 1px solid var(--glass-border);
}
.footer nav { display: flex; gap: 18px; justify-content: center; flex-wrap: wrap; margin-bottom: 12px; }
.footer nav a { color: var(--text-2); }
.footer nav a[aria-current="page"] { color: var(--text); font-weight: 600; }
.footer p { margin: 0 0 6px; }

/* 平板 */
@media (max-width: 980px) {
  .grid.features { grid-template-columns: repeat(2, 1fr); }
  .two { grid-template-columns: 1fr; }
}

/* 手机 */
@media (max-width: 680px) {
  body { font-size: 16px; }
  .topbar { padding: 10px 12px 0; }
  .bar { flex-wrap: wrap; border-radius: 22px; gap: 6px 10px; padding: 8px 8px 6px 14px; }
  .lang { margin-left: auto; }
  .nav { order: 3; width: 100%; margin: 0; overflow-x: auto; scrollbar-width: none; justify-content: space-between; }
  .nav::-webkit-scrollbar { display: none; }
  .nav a { padding: 5px 10px; font-size: 14px; }
  main { padding: 0 16px; }
  .hero { padding-top: 40px; }
  .hero h1 { font-size: 29px; }
  .hero h1 br { display: block; }
  .hero-icon { width: 112px; height: 112px; }
  .grid.features, .scenes, .gallery { grid-template-columns: 1fr; }
  .gallery .pair .frame { aspect-ratio: auto; }
  .card { padding: 22px; }
  .prose { padding: 24px 20px; }
  .section { padding-top: 56px; }
  .btn { width: 100%; justify-content: center; }
  .release time { margin-left: 0; width: 100%; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .btn, .faq summary::after { transition: none; }
}

.release + .release { margin-top: 28px; }