/* ZestDrop site. Brand colours come from the app: accent #D55418, logo orange #FC6A0F. */
:root {
  --bg: #FAF8F5;
  --bg-alt: #F3F0EB;
  --surface: #FFFFFF;
  --ink: #1F2226;
  --muted: #5F656D;
  --line: #E6E1DA;
  --accent: #D55418;
  --accent-ink: #FFFFFF;
  --accent-soft: #FFF0E6;
  --accent-text: #B5440F;
  --petal: #F2F3F5;
  --petal-ink: #24272B;
  --disk: rgba(248, 249, 250, .97);
  --disk-line: #E2E4E8;
  --stage-a: #E9EBED;
  --stage-b: #CFD3D7;
  --stage-c: rgba(30, 32, 35, .55);
  --shadow: 0 1px 2px rgba(40, 30, 20, .06), 0 12px 32px -12px rgba(40, 30, 20, .18);
  --radius: 18px;
  --font: "Segoe UI Variable Text", "Segoe UI", system-ui, -apple-system, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei UI", "Microsoft YaHei", "Noto Sans SC", sans-serif;
  --font-display: "Segoe UI Variable Display", "Segoe UI", system-ui, -apple-system, "PingFang SC", "Microsoft YaHei UI", "Noto Sans SC", sans-serif;
  --mono: "Cascadia Code", Consolas, ui-monospace, monospace;
  color-scheme: light;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #141516;
    --bg-alt: #1A1B1D;
    --surface: #202224;
    --ink: #ECEDEE;
    --muted: #A3A9B0;
    --line: #2E3135;
    --accent: #E8682E;
    --accent-ink: #FFFFFF;
    --accent-soft: #3A2316;
    --accent-text: #F59162;
    --petal: #2A2C30;
    --petal-ink: #E9EAEC;
    --disk: rgba(32, 34, 37, .97);
    --disk-line: #3A3D42;
    --stage-a: #2A2D31;
    --stage-b: #1B1D20;
    --stage-c: rgba(0, 0, 0, .55);
    --shadow: 0 1px 2px rgba(0, 0, 0, .3), 0 16px 40px -16px rgba(0, 0, 0, .6);
    color-scheme: dark;
  }
}

*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 72px; -webkit-text-size-adjust: 100%; }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } *, *::before, *::after { animation-duration: .01ms !important; transition-duration: .01ms !important; } }
body { margin: 0; background: var(--bg); color: var(--ink); font: 16px/1.6 var(--font); -webkit-font-smoothing: antialiased; }
img { max-width: 100%; height: auto; display: block; }
a { color: var(--accent-text); text-underline-offset: 3px; }
a:hover { text-decoration-thickness: 2px; }
:focus-visible { outline: 3px solid var(--accent); outline-offset: 3px; border-radius: 6px; }
[hidden] { display: none !important; }
h1, h2, h3 { font-family: var(--font-display); line-height: 1.15; margin: 0; letter-spacing: -.02em; }
h2 { font-size: clamp(1.75rem, 3.6vw, 2.6rem); font-weight: 700; }
h3 { font-size: 1.15rem; font-weight: 650; letter-spacing: -.01em; }
p { margin: 0; }
kbd { font: 600 .82em/1 var(--font); display: inline-block; padding: .28em .5em .32em; border: 1px solid var(--line); border-bottom-width: 2px; border-radius: 6px; background: var(--surface); color: var(--ink); white-space: nowrap; vertical-align: .08em; }
code { font: .9em var(--mono); background: var(--bg-alt); border: 1px solid var(--line); padding: .1em .35em; border-radius: 5px; }

.wrap { width: 100%; max-width: 1160px; margin: 0 auto; padding-inline: 24px; }
.narrow { max-width: 780px; }
.skip { position: absolute; left: 16px; top: -48px; background: var(--accent); color: var(--accent-ink); padding: 8px 14px; border-radius: 8px; z-index: 100; text-decoration: none; }
.skip:focus { top: 12px; }

/* Navigation */
.nav { position: sticky; top: 0; z-index: 50; background: color-mix(in srgb, var(--bg) 86%, transparent); backdrop-filter: saturate(1.4) blur(12px); -webkit-backdrop-filter: saturate(1.4) blur(12px); border-bottom: 1px solid transparent; transition: border-color .2s; }
.nav.scrolled { border-bottom-color: var(--line); }
.nav-row { display: flex; align-items: center; gap: 24px; height: 64px; }
.brand { display: inline-flex; align-items: center; gap: 10px; font: 700 1.12rem var(--font-display); color: var(--ink); text-decoration: none; letter-spacing: -.01em; }
.nav-links { display: flex; gap: 26px; margin-left: 12px; }
.nav-links a { color: var(--muted); text-decoration: none; font-weight: 500; font-size: .95rem; }
.nav-links a:hover { color: var(--ink); }
.nav-actions { display: flex; align-items: center; gap: 10px; margin-left: auto; }
.lang { font: 600 .88rem var(--font); color: var(--ink); background: transparent; border: 1px solid var(--line); border-radius: 999px; padding: 6px 12px; cursor: pointer; }
.lang:hover { border-color: var(--muted); }
.icon-link { display: inline-grid; place-items: center; width: 36px; height: 36px; color: var(--ink); border-radius: 999px; }
.icon-link:hover { background: var(--bg-alt); }
@media (max-width: 760px) { .nav-links { display: none; } .nav-row { gap: 12px; } }
@media (max-width: 400px) { .icon-link { display: none; } }

/* Buttons */
.btn { display: inline-flex; align-items: center; justify-content: center; gap: 10px; font: 600 1rem/1 var(--font); text-decoration: none; border-radius: 12px; padding: 15px 22px; border: 1px solid transparent; transition: transform .15s, background-color .15s, border-color .15s, box-shadow .15s; }
.btn:active { transform: translateY(1px); }
.btn-primary { background: var(--accent); color: var(--accent-ink); box-shadow: 0 8px 22px -10px var(--accent); }
.btn-primary:hover { background: color-mix(in srgb, var(--accent) 88%, #000); }
.btn-ghost { color: var(--ink); border-color: var(--line); background: var(--surface); }
.btn-ghost:hover { border-color: var(--muted); }
.btn-small { padding: 9px 14px; font-size: .9rem; border-radius: 10px; background: var(--ink); color: var(--bg); }
.btn-small:hover { background: color-mix(in srgb, var(--ink) 85%, var(--bg)); }
.btn-large { padding: 18px 28px; font-size: 1.08rem; border-radius: 14px; }

/* Hero */
.hero { padding-block: clamp(36px, 7vw, 88px) clamp(40px, 6vw, 72px); overflow: hidden; }
.hero-grid { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1.08fr); gap: clamp(28px, 5vw, 64px); align-items: center; }
@media (max-width: 920px) { .hero-grid { grid-template-columns: 1fr; } }
.eyebrow { display: inline-block; font-size: .86rem; font-weight: 600; color: var(--accent-text); background: var(--accent-soft); padding: 6px 12px; border-radius: 999px; margin-bottom: 22px; }
.hero h1 { font-size: clamp(2.7rem, 6.4vw, 4.9rem); font-weight: 750; letter-spacing: -.035em; line-height: 1.02; }
.hero h1 em { font-style: normal; color: var(--accent); display: block; }
.lead { font-size: clamp(1.06rem, 1.7vw, 1.22rem); color: var(--muted); margin-top: 22px; max-width: 34em; }
.cta-row { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 30px; }
.fineprint { font-size: .86rem; color: var(--muted); margin-top: 16px; }

/* Interactive demo */
.demo { min-width: 0; }
.stage { position: relative; height: clamp(420px, 46vw, 500px); border-radius: 24px; overflow: hidden; user-select: none; -webkit-user-select: none;
  background:
    radial-gradient(120% 70% at 110% 120%, var(--stage-c) 0 38%, transparent 62%),
    radial-gradient(90% 55% at -10% 105%, color-mix(in srgb, var(--stage-c) 60%, transparent) 0 30%, transparent 60%),
    radial-gradient(80% 60% at 20% 0%, rgba(255, 255, 255, .55), transparent 70%),
    linear-gradient(165deg, var(--stage-a), var(--stage-b));
  box-shadow: var(--shadow), inset 0 0 0 1px rgba(255, 255, 255, .25); }
.desk { list-style: none; margin: 0; padding: 18px; display: flex; flex-wrap: wrap; gap: 6px; align-content: flex-start; position: relative; z-index: 1; }
.file { width: 96px; padding: 8px 4px 6px; border-radius: 10px; border: 1px solid transparent; background: none; color: #1F2226; font: 500 .78rem/1.25 var(--font); display: grid; justify-items: center; gap: 6px; cursor: grab; touch-action: none; text-shadow: 0 1px 1px rgba(255, 255, 255, .6); }
@media (prefers-color-scheme: dark) { .file { color: #F1F2F3; text-shadow: 0 1px 2px rgba(0, 0, 0, .7); } }
@media (hover: hover) { .file:hover { background: rgba(255, 255, 255, .35); border-color: rgba(255, 255, 255, .55); } }
.file:focus-visible { background: rgba(255, 255, 255, .35); border-color: rgba(255, 255, 255, .55); }
.stage.open .file:not(.dragging) { background: none; border-color: transparent; }
.file.dragging { opacity: .45; }
.file.fresh { animation: pop .5s cubic-bezier(.2, 1.4, .4, 1); }
.file.fresh .file-name { color: var(--accent-text); font-weight: 650; }
@media (prefers-color-scheme: dark) { .file.fresh .file-name { color: #FFB089; } }
.file-name { max-width: 92px; overflow-wrap: break-word; text-align: center; }
@media (max-width: 480px) { .desk { gap: 2px; padding: 12px; } .file { width: 76px; } .file-name { max-width: 74px; } }
.ring { position: absolute; left: 50%; top: 58%; width: min(56%, 230px); aspect-ratio: 1; transform: translate(-50%, -50%); border-radius: 50%; border: 2px dashed rgba(255, 255, 255, .55); display: grid; place-items: center; text-align: center; color: rgba(31, 34, 38, .6); font-size: .86rem; font-weight: 600; padding: 24px; pointer-events: none; }
@media (prefers-color-scheme: dark) { .ring { border-color: rgba(255, 255, 255, .16); color: rgba(255, 255, 255, .45); } }
.stage.open .ring { opacity: 0; }
.file-icon { width: 46px; height: 56px; position: relative; border-radius: 6px 14px 6px 6px; background: #fff; box-shadow: 0 2px 6px rgba(0, 0, 0, .18); display: grid; place-items: end center; padding-bottom: 7px; }
.file-icon::before { content: ""; position: absolute; top: 0; right: 0; width: 14px; height: 14px; background: linear-gradient(225deg, transparent 50%, rgba(0, 0, 0, .12) 50%); border-radius: 0 14px 0 4px; }
.file-icon b { font: 700 .62rem/1 var(--font); color: #fff; padding: 3px 5px; border-radius: 4px; letter-spacing: .02em; background: var(--tag, #6B7280); }
.t-image { --tag: #2F8F5B; } .t-video { --tag: #6D4FD1; } .t-audio { --tag: #C2417A; } .t-pdf { --tag: #D13F2F; } .t-office { --tag: #2B63C9; } .t-archive { --tag: #8A6A2F; } .t-folder { --tag: #B98410; }
@keyframes pop { from { transform: scale(.6); opacity: 0; } to { transform: none; opacity: 1; } }

.wheel-wrap { position: absolute; inset: 0; display: grid; place-items: center; z-index: 6; pointer-events: none; }
.wheel { width: min(84%, 360px); height: auto; overflow: visible; filter: drop-shadow(0 18px 30px rgba(0, 0, 0, .22)); animation: wheel-in .22s cubic-bezier(.2, .9, .3, 1.2); }
@keyframes wheel-in { from { transform: scale(.82); opacity: 0; } to { transform: none; opacity: 1; } }
.wheel .disk { fill: var(--disk); stroke: var(--disk-line); }
.wheel .petal { fill: var(--petal); stroke: var(--disk); stroke-width: 3; transition: fill .12s; }
.wheel .petal.on { fill: var(--accent); }
.wheel .label { fill: var(--petal-ink); font: 600 14px var(--font); text-anchor: middle; dominant-baseline: middle; pointer-events: none; }
.wheel .label.small { font-size: 12px; }
.wheel .label.on { fill: #fff; }
.wheel .hub { fill: var(--surface); }
.wheel .hub-title { fill: var(--ink); font: 650 15px var(--font); text-anchor: middle; }
.wheel .hub-hint { fill: var(--muted); font: 400 10.5px var(--font); text-anchor: middle; }

.ghost { position: absolute; left: 0; top: 0; z-index: 7; pointer-events: none; transform: translate(10px, 12px); opacity: .9; }
.ghost .file-icon { transform: rotate(-6deg) scale(.86); box-shadow: 0 10px 24px rgba(0, 0, 0, .3); }
.ghost .badge { position: absolute; right: -10px; bottom: -6px; background: var(--accent); color: #fff; font: 700 .7rem/1 var(--font); padding: 4px 6px; border-radius: 6px; white-space: nowrap; box-shadow: 0 2px 6px rgba(0, 0, 0, .25); }

.toast { position: absolute; right: 16px; bottom: 16px; z-index: 5; width: min(300px, calc(100% - 32px)); background: var(--surface); color: var(--ink); border-radius: 14px; padding: 14px 16px 12px; box-shadow: 0 14px 30px -10px rgba(0, 0, 0, .35); display: grid; gap: 4px; animation: toast-in .25s ease-out; }
@keyframes toast-in { from { transform: translateY(12px); opacity: 0; } to { transform: none; opacity: 1; } }
.toast strong { font-size: .95rem; }
.toast span { font-size: .84rem; color: var(--muted); overflow-wrap: anywhere; }
.toast small { font-size: .78rem; color: var(--muted); }
.bar { height: 4px; border-radius: 4px; background: var(--accent-soft); overflow: hidden; margin: 8px 0 4px; }
.bar i { display: block; height: 100%; width: 0; background: var(--accent); border-radius: inherit; transition: width .2s linear; }
.bar.indeterminate i { width: 30%; animation: slide 1.1s ease-in-out infinite; }
@keyframes slide { from { transform: translateX(-100%); } to { transform: translateX(340%); } }

.demo-bar { display: flex; flex-wrap: wrap; gap: 12px 16px; align-items: center; justify-content: space-between; margin-top: 14px; }
.demo-help { font-size: .9rem; color: var(--muted); }
.mode { display: inline-flex; padding: 3px; border-radius: 12px; background: var(--bg-alt); border: 1px solid var(--line); }
.mode button { font: 600 .84rem var(--font); color: var(--muted); background: transparent; border: 0; border-radius: 9px; padding: 7px 11px; cursor: pointer; display: inline-flex; gap: 6px; align-items: center; }
.mode button kbd { font-size: .72rem; padding: .22em .4em; }
.mode button[aria-pressed="true"] { background: var(--surface); color: var(--ink); box-shadow: 0 1px 3px rgba(0, 0, 0, .12); }
@media (hover: none) { .mode button kbd { display: none; } }

/* Highlights strip */
.strip { border-block: 1px solid var(--line); background: var(--surface); }
.strip-row { list-style: none; margin: 0 auto; display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 20px; padding-block: 22px; }
.strip-row li { display: grid; gap: 2px; }
.strip-row b { font-size: .98rem; }
.strip-row span { font-size: .86rem; color: var(--muted); }
@media (max-width: 820px) { .strip-row { grid-template-columns: repeat(2, minmax(0, 1fr)); } }

/* Sections */
.section { padding-block: clamp(64px, 9vw, 112px); }
.section-alt { background: var(--bg-alt); }
.section-lead { color: var(--muted); font-size: 1.08rem; margin-top: 14px; max-width: 40em; }

.steps { list-style: none; padding: 0; margin: 44px 0 0; display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 20px; }
.steps li { background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); padding: 26px 24px 28px; }
.steps h3 { margin: 18px 0 8px; }
.steps p { color: var(--muted); }
.step-n { display: inline-grid; place-items: center; width: 34px; height: 34px; border-radius: 999px; background: var(--accent-soft); color: var(--accent-text); font-weight: 700; }
@media (max-width: 820px) { .steps { grid-template-columns: 1fr; } }

.cards { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 18px; margin-top: 44px; }
@media (max-width: 960px) { .cards { grid-template-columns: repeat(2, minmax(0, 1fr)); } }
@media (max-width: 620px) { .cards { grid-template-columns: 1fr; } }
.card { background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius); padding: 24px; display: grid; align-content: start; gap: 10px; }
.card p:last-child { color: var(--muted); font-size: .96rem; }
.card-icon { width: 42px; height: 42px; border-radius: 12px; background: var(--accent-soft); display: grid; place-items: center; margin-bottom: 4px; }
.card-icon svg { width: 22px; height: 22px; fill: none; stroke: var(--accent-text); stroke-width: 1.8; stroke-linecap: round; stroke-linejoin: round; }
.formats { font-size: .8rem; font-weight: 600; color: var(--accent-text); letter-spacing: .01em; }

.shot-main { margin: 44px 0 0; }
.shot-main img { border-radius: 16px; border: 1px solid var(--line); box-shadow: var(--shadow); width: 100%; }
figcaption { font-size: .9rem; color: var(--muted); margin-top: 12px; }
.shot-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 18px; margin-top: 28px; }
.shot-grid figure { margin: 0; }
.shot-grid img { border-radius: 16px; width: 100%; aspect-ratio: 1 / 1; object-fit: cover; box-shadow: var(--shadow); }
@media (max-width: 760px) { .shot-grid { grid-template-columns: 1fr; max-width: 440px; } }
.shot-progress { margin: 28px 0 0; display: flex; flex-wrap: wrap; align-items: center; gap: 18px 28px; background: #26282B; border-radius: var(--radius); padding: 22px 28px; }
.shot-progress img { width: min(320px, 100%); }
.shot-progress figcaption { color: #C9CDD2; margin: 0; flex: 1 1 260px; font-size: .98rem; }

.section-dark { background: #1A1B1D; color: #ECEDEE; }
.section-dark .section-lead { color: #A9AFB6; }
.privacy-grid { display: grid; grid-template-columns: minmax(0, 1fr) minmax(0, 1.1fr); gap: 40px 64px; align-items: start; }
@media (max-width: 860px) { .privacy-grid { grid-template-columns: 1fr; } }
.checks { list-style: none; margin: 0; padding: 0; display: grid; gap: 14px; }
.checks li { position: relative; padding: 18px 20px 18px 56px; border: 1px solid #2E3135; border-radius: 14px; background: #202224; color: #B9BEC4; }
.checks li b { color: #F4F5F6; }
.checks li::before { content: ""; position: absolute; left: 20px; top: 21px; width: 20px; height: 20px; border-radius: 999px; background: #E8682E url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 20 20'%3E%3Cpath d='m5.5 10.5 3 3 6-7' fill='none' stroke='white' stroke-width='2.2' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E") center / 100% no-repeat; }

.download { text-align: center; display: grid; justify-items: center; }
.download h2 { margin-top: 18px; }
.download .section-lead { margin-inline: auto; }
.download .btn { margin-top: 30px; }
.install { text-align: left; margin: 36px auto 0; padding: 0; list-style: none; counter-reset: s; display: grid; gap: 10px; max-width: 460px; }
.install li { counter-increment: s; position: relative; padding: 12px 16px 12px 52px; border: 1px solid var(--line); border-radius: 12px; background: var(--surface); }
.install li::before { content: counter(s); position: absolute; left: 14px; top: 11px; width: 26px; height: 26px; border-radius: 999px; background: var(--accent-soft); color: var(--accent-text); font-weight: 700; font-size: .9rem; display: grid; place-items: center; }
.links { margin-top: 26px; display: flex; flex-wrap: wrap; gap: 8px 12px; justify-content: center; color: var(--muted); }
.requirements { margin-top: 18px; color: var(--muted); font-size: .9rem; max-width: 36em; }

.faq { margin-top: 36px; display: grid; gap: 10px; }
.faq details { background: var(--surface); border: 1px solid var(--line); border-radius: 14px; padding: 0 20px; }
.faq summary { cursor: pointer; list-style: none; padding: 18px 32px 18px 0; font-weight: 600; position: relative; }
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after { content: ""; position: absolute; right: 2px; top: 50%; width: 10px; height: 10px; border-right: 2px solid var(--muted); border-bottom: 2px solid var(--muted); transform: translateY(-70%) rotate(45deg); transition: transform .2s; }
.faq details[open] summary::after { transform: translateY(-30%) rotate(-135deg); }
.faq details > div { padding: 0 0 20px; color: var(--muted); }
.faq-more { margin-top: 28px; color: var(--muted); }

.footer { border-top: 1px solid var(--line); padding-block: 32px; font-size: .9rem; color: var(--muted); }
.footer-row { display: flex; flex-wrap: wrap; gap: 14px 28px; align-items: center; }
.footer-row p { flex: 1 1 300px; }
.footer-links { display: flex; flex-wrap: wrap; gap: 8px 20px; }
.footer-links a { color: var(--muted); }
.footer-links a:hover { color: var(--ink); }

html[lang="zh-CN"] body { line-height: 1.7; }
html[lang="zh-CN"] .hero h1 { letter-spacing: -.01em; }
html[lang="zh-CN"] .hero h1 em { display: inline; }