:root {
  color-scheme: dark;
  --bg: #0e1014;
  --bg-deep: #090b0f;
  --panel: #151922;
  --panel-2: #1b202b;
  --card: #222837;
  --line: #2e3647;
  --text: #f4f7fb;
  --muted: #9aa4b2;
  --weak: #626d7d;
  --blue: #4f8cff;
  --blue-strong: #3f7ff0;
  --green: #22c55e;
  --orange: #f59e0b;
  --red: #ef4444;
  --warm: #ffb45c;
  --shadow: 0 28px 90px rgba(0, 0, 0, 0.38);
  --header-bg: rgba(14, 16, 20, 0.76);
  --max-width: 1320px;
  --font: Inter, "Noto Sans SC", "Microsoft YaHei UI", "Microsoft YaHei", system-ui, sans-serif;
}

html[data-theme="light"] {
  color-scheme: light;
  --bg: #f5f7fb;
  --bg-deep: #e9eef6;
  --panel: #ffffff;
  --panel-2: #eef2f7;
  --card: #ffffff;
  --line: #d5dce8;
  --text: #172033;
  --muted: #5e6b7e;
  --weak: #8a96a8;
  --blue: #2563eb;
  --blue-strong: #1d4ed8;
  --green: #16a34a;
  --orange: #d97706;
  --red: #dc2626;
  --warm: #bd650d;
  --shadow: 0 28px 90px rgba(31, 47, 76, 0.14);
  --header-bg: rgba(245, 247, 251, 0.84);
}

*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; min-width: 320px; overflow-x: hidden; background: var(--bg); color: var(--text); font-family: var(--font); line-height: 1.6; -webkit-font-smoothing: antialiased; }
body.is-modal-open { overflow: hidden; }
button, input, textarea, select { font: inherit; }
button, a { -webkit-tap-highlight-color: transparent; }
a { color: inherit; text-decoration: none; }
img { display: block; max-width: 100%; }
[hidden] { display: none !important; }

.skip-link { position: fixed; z-index: 1000; left: 16px; top: 16px; transform: translateY(-160%); padding: 10px 14px; border-radius: 10px; background: var(--text); color: var(--bg); font-weight: 700; }
.skip-link:focus { transform: translateY(0); }
.section-shell { width: min(var(--max-width), calc(100% - 48px)); margin-inline: auto; }
.section { padding-block: 112px; scroll-margin-top: 80px; }

.ambient { position: fixed; inset: 0; z-index: -1; overflow: hidden; pointer-events: none; }
.ambient__orb { position: absolute; width: 560px; height: 560px; border-radius: 50%; filter: blur(120px); opacity: .16; }
.ambient__orb--blue { top: -220px; right: 2%; background: #2563eb; }
.ambient__orb--violet { top: 680px; left: -280px; background: #7c3aed; opacity: .12; }
.ambient__grid { position: absolute; inset: 0; opacity: .18; background-image: linear-gradient(rgba(140, 155, 183, .08) 1px, transparent 1px), linear-gradient(90deg, rgba(140, 155, 183, .08) 1px, transparent 1px); background-size: 52px 52px; mask-image: linear-gradient(to bottom, black, transparent 56%); }

.site-header { position: sticky; top: 0; z-index: 40; border-bottom: 1px solid transparent; background: var(--header-bg); backdrop-filter: blur(22px) saturate(140%); }
.site-header.is-scrolled { border-color: color-mix(in srgb, var(--line) 78%, transparent); }
.site-header__inner { width: min(var(--max-width), calc(100% - 48px)); min-height: 74px; margin-inline: auto; display: flex; align-items: center; gap: 30px; }
.brand { display: inline-flex; align-items: center; gap: 11px; flex: 0 0 auto; }
.brand__logo { width: 40px; height: 40px; border-radius: 11px; object-fit: contain; box-shadow: 0 10px 26px rgba(37, 99, 235, .24); }
.brand__copy { display: grid; line-height: 1.08; }
.brand__copy strong { font-size: 17px; letter-spacing: .02em; }
.brand__copy small { margin-top: 5px; color: var(--muted); font-size: 10px; letter-spacing: .18em; text-transform: uppercase; }
.site-nav { margin-left: auto; display: flex; align-items: center; gap: 6px; }
.site-nav a { padding: 9px 12px; border-radius: 10px; color: var(--muted); font-size: 14px; font-weight: 650; transition: color .2s, background .2s; }
.site-nav a:hover, .site-nav a:focus-visible { background: var(--panel-2); color: var(--text); }
.header-actions { display: flex; align-items: center; gap: 10px; }
.nav-toggle { display: none; width: 42px; height: 42px; border: 1px solid var(--line); border-radius: 12px; background: var(--panel); padding: 11px; }
.nav-toggle span { display: block; height: 2px; margin: 4px 0; border-radius: 2px; background: var(--text); }
.theme-toggle { display: inline-flex; align-items: center; gap: 8px; border: 0; background: transparent; color: var(--muted); cursor: pointer; }
.theme-toggle__track { position: relative; width: 38px; height: 22px; border: 1px solid var(--line); border-radius: 999px; background: var(--panel-2); }
.theme-toggle__thumb { position: absolute; top: 3px; left: 3px; width: 14px; height: 14px; border-radius: 50%; background: var(--blue); box-shadow: 0 0 0 3px rgba(79, 140, 255, .12); transition: transform .24s; }
html[data-theme="light"] .theme-toggle__thumb { transform: translateX(16px); }
.theme-toggle__label { min-width: 28px; font-size: 12px; font-weight: 700; }

.button { display: inline-flex; justify-content: center; align-items: center; min-height: 42px; padding: 0 19px; border: 1px solid transparent; border-radius: 12px; cursor: pointer; font-weight: 760; transition: transform .2s, background .2s, border-color .2s, box-shadow .2s; }
.button:hover { transform: translateY(-1px); }
.button:focus-visible, button:focus-visible, a:focus-visible { outline: 3px solid color-mix(in srgb, var(--blue) 50%, transparent); outline-offset: 3px; }
.button--primary { background: var(--blue-strong); color: #fff; box-shadow: 0 12px 30px rgba(63, 127, 240, .28); }
.button--primary:hover { background: var(--blue); box-shadow: 0 16px 36px rgba(63, 127, 240, .34); }
.button--secondary { border-color: var(--line); background: var(--panel); color: var(--text); }
.button--secondary:hover { border-color: var(--blue); background: var(--panel-2); }
.button--warm { background: linear-gradient(135deg, #ffb45c, #ff7a59); color: #21140a; box-shadow: 0 14px 34px rgba(245, 158, 11, .2); }
.button--light { background: #fff; color: #172033; }
.button--large { min-height: 52px; padding-inline: 24px; border-radius: 14px; }
.button--compact { min-height: 38px; padding-inline: 16px; font-size: 13px; }
.button--full { width: 100%; }
.text-link { color: var(--muted); font-weight: 700; }
.text-link:hover { color: var(--text); }

.hero { min-height: 780px; padding-block: 104px 80px; display: grid; grid-template-columns: minmax(0, .84fr) minmax(580px, 1.16fr); gap: 68px; align-items: center; }
.eyebrow, .section-kicker { color: var(--blue); font-size: 12px; font-weight: 800; letter-spacing: .16em; text-transform: uppercase; }
.eyebrow { display: inline-flex; align-items: center; gap: 8px; padding: 8px 12px; border: 1px solid color-mix(in srgb, var(--blue) 25%, var(--line)); border-radius: 999px; background: color-mix(in srgb, var(--blue) 8%, transparent); }
.eyebrow span { width: 7px; height: 7px; border-radius: 50%; background: var(--green); box-shadow: 0 0 0 5px color-mix(in srgb, var(--green) 12%, transparent); }
.hero h1 { max-width: 720px; margin: 22px 0 24px; font-size: clamp(52px, 5.2vw, 78px); line-height: 1.08; letter-spacing: -.055em; }
.hero h1 span { color: transparent; background: linear-gradient(105deg, #77a8ff, #4f8cff 45%, #b190ff); background-clip: text; -webkit-background-clip: text; }
.hero__lead { max-width: 650px; margin: 0; color: var(--muted); font-size: 18px; line-height: 1.9; }
.hero__actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 34px; }
.hero__proof { display: flex; flex-wrap: wrap; gap: 20px; margin-top: 32px; color: var(--muted); font-size: 13px; }
.hero__proof span { display: inline-flex; align-items: center; gap: 7px; }
.proof-dot { width: 7px; height: 7px; border-radius: 50%; }
.proof-dot--green { background: var(--green); }.proof-dot--blue { background: var(--blue); }.proof-dot--orange { background: var(--orange); }

.hero__visual { position: relative; perspective: 1400px; }
.product-window { position: relative; min-width: 650px; aspect-ratio: 1.62; overflow: hidden; border: 1px solid var(--line); border-radius: 18px; background: #0e1014; box-shadow: var(--shadow); transform: rotateY(-4deg) rotateX(2deg); transform-origin: 50% 50%; }
.product-window__topbar { height: 52px; padding: 0 12px; display: flex; align-items: center; gap: 7px; border-bottom: 1px solid #2e3647; background: #10131a; color: #9aa4b2; font-size: 7px; }
.product-window__identity { width: 66px; color: #f4f7fb; font-size: 11px; font-weight: 900; }
.product-window__project { width: 82px; padding: 7px; border: 1px solid #2e3647; border-radius: 7px; background: #1b202b; text-align: center; }
.product-window__tabs { display: flex; gap: 4px; }
.product-window__tabs span { padding: 7px 8px; border-radius: 999px; white-space: nowrap; }
.product-window__tabs .is-active { border: 1px solid rgba(79, 140, 255, .46); background: rgba(79, 140, 255, .16); color: #f4f7fb; }
.product-window__search { margin-left: auto; width: 100px; padding: 7px 10px; border: 1px solid #2e3647; border-radius: 8px; background: #151922; }
.product-window__settings { padding: 7px 9px; border: 1px solid #2e3647; border-radius: 8px; background: #222837; color: #f4f7fb; }
.product-window__body { height: calc(100% - 52px); padding: 22px; background: #0e1014; }
.preview-heading { display: flex; align-items: center; justify-content: space-between; }
.preview-heading > div:first-child { display: grid; }
.preview-heading strong { color: #f4f7fb; font-size: 19px; }
.preview-heading small { margin-top: 2px; color: #9aa4b2; font-size: 8px; }
.preview-heading > div:last-child { display: flex; gap: 7px; }
.preview-heading > div:last-child span { padding: 7px 11px; border: 1px solid #2e3647; border-radius: 8px; background: #222837; color: #f4f7fb; font-size: 8px; }
.preview-heading > div:last-child span:first-child { border-color: #3f7ff0; background: #3f7ff0; }
.preview-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 11px; margin-top: 18px; }
.preview-project { min-height: 160px; padding: 13px; border: 1px solid #2e3647; border-radius: 9px; background: #1b202b; color: #f4f7fb; }
.preview-project--selected { border-color: rgba(79, 140, 255, .46); background: rgba(79, 140, 255, .12); }
.preview-project > div { display: flex; justify-content: space-between; gap: 8px; }
.preview-project strong { font-size: 10px; }.preview-project em { padding: 2px 6px; border-radius: 999px; background: rgba(34, 197, 94, .12); color: #22c55e; font-size: 6px; font-style: normal; }
.preview-project p { min-height: 32px; color: #9aa4b2; font-size: 7px; overflow-wrap: anywhere; }
.preview-project b { font-size: 28px; }.preview-project > small { margin-left: 4px; color: #9aa4b2; font-size: 7px; }
.preview-project footer { margin-top: 17px; padding-top: 9px; border-top: 1px solid #2e3647; color: #4f8cff; font-size: 7px; }
.product-window__glow { position: absolute; right: -70px; bottom: -70px; width: 240px; height: 240px; border-radius: 50%; background: rgba(79, 140, 255, .17); filter: blur(60px); }
.visual-note { position: absolute; z-index: 2; display: flex; align-items: center; gap: 10px; padding: 11px 14px; border: 1px solid rgba(118, 139, 171, .32); border-radius: 12px; background: rgba(21, 25, 34, .88); color: #f4f7fb; box-shadow: 0 18px 40px rgba(0, 0, 0, .26); backdrop-filter: blur(12px); }
.visual-note strong { font-size: 17px; }.visual-note span { color: #9aa4b2; font-size: 10px; }.visual-note i { width: 8px; height: 8px; border-radius: 50%; background: #22c55e; box-shadow: 0 0 0 5px rgba(34, 197, 94, .13); }
.visual-note--top { top: -26px; right: 26px; display: grid; gap: 0; }.visual-note--bottom { bottom: -22px; left: 34px; }

.trust-strip { display: grid; grid-template-columns: repeat(5, 1fr); border-block: 1px solid var(--line); }
.trust-strip span { position: relative; padding: 24px 12px; color: var(--muted); text-align: center; font-size: 13px; font-weight: 750; }
.trust-strip span + span::before { content: ""; position: absolute; left: 0; top: 27%; width: 1px; height: 46%; background: var(--line); }

.section-heading { display: grid; grid-template-columns: minmax(0, 1.25fr) minmax(320px, .75fr); gap: 70px; align-items: end; margin-bottom: 42px; }
.section-heading h2, .privacy-card h2, .support-card h2, .download-banner h2 { margin: 8px 0 0; font-size: clamp(34px, 4vw, 54px); line-height: 1.18; letter-spacing: -.035em; }
.section-heading > p, .privacy-card p, .support-card p, .download-banner p { margin: 0; color: var(--muted); font-size: 16px; line-height: 1.85; }

.demo-shell { overflow: hidden; border: 1px solid var(--line); border-radius: 22px; background: var(--panel); box-shadow: var(--shadow); }
.demo-shell__toolbar, .demo-shell__footer { display: flex; align-items: center; min-height: 54px; padding-inline: 18px; background: var(--panel); }
.demo-shell__toolbar { border-bottom: 1px solid var(--line); }
.window-dots { display: flex; gap: 6px; }.window-dots i { width: 10px; height: 10px; border-radius: 50%; background: var(--weak); }.window-dots i:nth-child(1){background:#ff5f57}.window-dots i:nth-child(2){background:#febc2e}.window-dots i:nth-child(3){background:#28c840}
.demo-shell__address { margin-inline: auto; display: flex; align-items: center; gap: 8px; color: var(--muted); font-size: 12px; }.demo-shell__address span { width: 6px; height: 6px; border-radius: 50%; background: var(--green); }
.demo-shell__actions { display: flex; gap: 14px; }.demo-shell__actions button, .demo-shell__actions a { border: 0; background: none; color: var(--muted); cursor: pointer; font-size: 12px; }.demo-shell__actions button:hover, .demo-shell__actions a:hover { color: var(--text); }
.demo-shell__stage { position: relative; aspect-ratio: 1600 / 980; min-height: 500px; overflow: hidden; background: #0e1014; }
.demo-shell__stage iframe { width: 100%; height: 100%; border: 0; background: #0e1014; }
.demo-poster { position: absolute; inset: 0; z-index: 2; display: grid; grid-template-columns: 1fr .72fr; gap: 40px; align-items: center; padding: clamp(36px, 6vw, 86px); background: radial-gradient(circle at 80% 20%, rgba(79, 140, 255, .25), transparent 34%), linear-gradient(125deg, #0e1014 20%, #151922); }
.demo-poster::before { content: ""; position: absolute; inset: 8% 5%; border: 1px solid rgba(79, 140, 255, .16); border-radius: 28px; transform: rotate(-3deg); pointer-events: none; }
.demo-poster__copy { position: relative; z-index: 1; max-width: 590px; }.demo-poster__copy > span { color: #77a8ff; font-size: 12px; font-weight: 800; letter-spacing: .14em; }.demo-poster__copy h3 { margin: 12px 0; color: #f4f7fb; font-size: clamp(32px, 4vw, 58px); line-height: 1.12; letter-spacing: -.04em; }.demo-poster__copy p { max-width: 550px; margin: 0 0 26px; color: #9aa4b2; }.demo-poster__copy small { display: block; margin-top: 12px; color: #626d7d; }
.demo-poster__map { position: relative; z-index: 1; display: grid; gap: 12px; }.demo-poster__map span { padding: 16px 20px; border: 1px solid #2e3647; border-radius: 14px; background: rgba(27, 32, 43, .72); color: #9aa4b2; font-weight: 750; }.demo-poster__map span.is-active { transform: translateX(-16px); border-color: rgba(79, 140, 255, .56); background: rgba(79, 140, 255, .14); color: #f4f7fb; }
.demo-shell__footer { justify-content: space-between; min-height: 46px; border-top: 1px solid var(--line); color: var(--muted); font-size: 11px; }

.feature-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; }
.feature-card { position: relative; min-height: 320px; overflow: hidden; padding: 28px; border: 1px solid var(--line); border-radius: 20px; background: color-mix(in srgb, var(--panel) 90%, transparent); transition: transform .24s, border-color .24s, background .24s; }
.feature-card:hover { transform: translateY(-4px); border-color: color-mix(in srgb, var(--blue) 45%, var(--line)); background: var(--panel); }
.feature-card--wide { grid-column: span 2; }
.feature-card__index { position: absolute; top: 24px; right: 26px; color: var(--weak); font-size: 12px; font-weight: 800; }
.feature-card__icon { width: 46px; height: 46px; display: grid; place-items: center; border: 1px solid color-mix(in srgb, var(--blue) 26%, var(--line)); border-radius: 14px; background: color-mix(in srgb, var(--blue) 10%, transparent); color: var(--blue); font-weight: 900; }
.feature-card h3 { margin: 64px 0 12px; font-size: 22px; }.feature-card p { margin: 0; color: var(--muted); font-size: 14px; }.feature-card ul { display: flex; flex-wrap: wrap; gap: 8px; padding: 0; margin: 24px 0 0; list-style: none; }.feature-card li { padding: 6px 9px; border-radius: 7px; background: var(--panel-2); color: var(--muted); font-size: 11px; }

.workflow-list { display: grid; grid-template-columns: repeat(4, 1fr); gap: 0; padding: 0; margin: 0; list-style: none; counter-reset: steps; }
.workflow-list li { position: relative; min-height: 230px; padding: 26px 28px 28px; border-block: 1px solid var(--line); }
.workflow-list li + li { border-left: 1px solid var(--line); }
.workflow-list li > span { color: var(--blue); font-size: 12px; font-weight: 850; }.workflow-list li > span::after { content: ""; display: block; width: 8px; height: 8px; margin-top: 22px; border-radius: 50%; background: var(--blue); box-shadow: 0 0 0 7px color-mix(in srgb, var(--blue) 11%, transparent); }.workflow-list strong { display: block; margin-top: 28px; font-size: 20px; }.workflow-list p { margin: 8px 0 0; color: var(--muted); font-size: 13px; }

.privacy-card, .support-card { margin-block: 22px 112px; padding: 48px; display: grid; align-items: center; gap: 38px; border: 1px solid var(--line); border-radius: 24px; background: linear-gradient(130deg, color-mix(in srgb, var(--blue) 8%, var(--panel)), var(--panel)); }
.privacy-card { grid-template-columns: 150px 1fr .8fr; }.privacy-card__mark { width: 126px; height: 126px; display: grid; place-items: center; border: 1px solid color-mix(in srgb, var(--blue) 35%, var(--line)); border-radius: 34px; background: color-mix(in srgb, var(--blue) 10%, transparent); color: var(--blue); font-size: 27px; font-weight: 900; box-shadow: inset 0 0 42px color-mix(in srgb, var(--blue) 7%, transparent); }.privacy-card h2, .support-card h2 { font-size: clamp(28px, 3vw, 42px); }.privacy-card p, .support-card p { margin-top: 12px; font-size: 14px; }.privacy-card__facts { display: grid; grid-template-columns: repeat(3, 1fr); gap: 8px; }.privacy-card__facts span { min-height: 92px; padding: 14px; display: grid; align-content: center; border: 1px solid var(--line); border-radius: 14px; background: var(--bg); color: var(--muted); font-size: 10px; text-align: center; }.privacy-card__facts strong { display: block; color: var(--text); font-size: 17px; }
.support-card { grid-template-columns: 1fr auto; }.support-card__actions { min-width: 220px; display: grid; justify-items: stretch; gap: 14px; text-align: center; }
.download-banner { margin-bottom: 100px; padding: 56px; display: flex; justify-content: space-between; align-items: center; gap: 40px; border-radius: 26px; background: linear-gradient(120deg, #245fcc, #4f8cff 62%, #8b6fe8); color: #fff; box-shadow: 0 30px 80px rgba(37, 99, 235, .28); }.download-banner .section-kicker, .download-banner p { color: rgba(255, 255, 255, .75); }.download-banner h2 { max-width: 760px; font-size: clamp(32px, 4vw, 52px); }

.site-footer { padding-block: 42px; display: grid; grid-template-columns: auto 1fr auto auto; gap: 30px; align-items: center; border-top: 1px solid var(--line); color: var(--muted); }.brand--footer .brand__logo { width: 34px; height: 34px; }.site-footer p { margin: 0; font-size: 13px; }.site-footer nav { display: flex; gap: 16px; }.site-footer nav a, .site-footer nav button { padding: 0; border: 0; background: none; color: var(--muted); cursor: pointer; font-size: 12px; }.site-footer nav a:hover, .site-footer nav button:hover { color: var(--text); }.site-footer > small { font-size: 11px; }

.modal { position: fixed; inset: 0; z-index: 100; display: grid; place-items: center; padding: 24px; }.modal__backdrop { position: absolute; inset: 0; background: rgba(3, 6, 12, .78); backdrop-filter: blur(12px); }.modal__card { position: relative; z-index: 1; width: min(540px, 100%); max-height: calc(100vh - 48px); overflow: auto; padding: 36px; border: 1px solid var(--line); border-radius: 24px; background: var(--panel); box-shadow: var(--shadow); }.modal__card--wide { width: min(720px, 100%); }.modal__close { position: absolute; top: 16px; right: 16px; width: 38px; height: 38px; display: grid; place-items: center; border: 1px solid var(--line); border-radius: 11px; background: var(--panel-2); color: var(--text); cursor: pointer; font-size: 23px; line-height: 1; }.modal__card h2 { margin: 8px 0 10px; font-size: 34px; }.modal__card > p { margin: 0 0 24px; color: var(--muted); font-size: 14px; }.release-card { position: relative; margin-bottom: 18px; padding: 16px; display: flex; align-items: center; gap: 14px; border: 1px solid var(--line); border-radius: 16px; background: var(--bg); }.release-card img { width: 48px; height: 48px; border-radius: 13px; }.release-card > div { display: grid; line-height: 1.45; }.release-card strong { font-size: 15px; }.release-card span, .release-card small { color: var(--muted); font-size: 11px; }.release-card__stable { margin-left: auto; padding: 4px 8px; border-radius: 999px; background: color-mix(in srgb, var(--green) 12%, transparent); color: var(--green) !important; font-weight: 800; }.modal__meta { display: flex; justify-content: space-between; gap: 18px; margin-top: 14px; color: var(--weak); font-size: 10px; }.modal__meta a { color: var(--blue); white-space: nowrap; }.support-codes { display: grid; grid-template-columns: repeat(2, 1fr); gap: 18px; margin: 0 0 20px; }.support-codes figure { margin: 0; padding: 14px; border: 1px solid var(--line); border-radius: 16px; background: #fff; }.support-codes img { width: 100%; aspect-ratio: 1; object-fit: contain; }.support-codes figcaption { padding: 10px 4px 0; display: flex; justify-content: space-between; color: #172033; font-size: 12px; }.support-codes figcaption span { color: #6b7280; }

/* 统一的“免费下载 + 自愿赞助”组合弹窗。 */
.modal__card--download-support { width: min(1040px, 100%); max-height: calc(100vh - 48px); padding: 30px; text-align: left; scrollbar-width: thin; }
.download-support__heading { display: flex; align-items: center; gap: 16px; padding-right: 48px; }
.download-support__logo { width: 58px; height: 58px; flex: 0 0 auto; border-radius: 16px; object-fit: contain; box-shadow: 0 12px 32px rgba(37, 99, 235, .26); }
.download-support__heading h2 { margin: 3px 0 1px; font-size: 25px; }
.download-support__heading p { margin: 0; color: var(--muted); font-size: 13px; }
.download-file-card { display: flex; align-items: center; justify-content: space-between; gap: 20px; margin-top: 22px; padding: 18px 20px; border: 1px solid color-mix(in srgb, var(--blue) 34%, var(--line)); border-radius: 16px; background: color-mix(in srgb, var(--blue) 9%, var(--panel-2)); }
.download-file-card strong, .download-file-card span { display: block; }
.download-file-card strong { font-size: 15px; }
.download-file-card span { margin-top: 3px; color: var(--muted); font-size: 11px; }
.download-file-card .button { flex: 0 0 auto; min-width: 126px; }
.support-message { margin: 18px 0; padding: 15px 17px; border-left: 3px solid var(--blue); border-radius: 0 12px 12px 0; color: var(--muted); background: var(--panel-2); font-size: 13px; line-height: 1.75; }
.support-message strong { color: var(--text); }
.support-modal-layout { display: grid; grid-template-columns: minmax(0, 1.45fr) minmax(260px, .75fr); gap: 16px; }
.support-payment-panel, .support-contact-panel { padding: 20px; border: 1px solid var(--line); border-radius: 16px; background: var(--bg); }
.support-panel-title { display: flex; align-items: center; justify-content: space-between; gap: 14px; margin-bottom: 16px; }
.support-panel-title h3, .support-contact-panel h3 { margin: 3px 0 0; font-size: 17px; line-height: 1.4; }
.support-panel-cta { display: flex; align-items: center; justify-content: flex-end; gap: 12px; min-width: 0; margin-left: auto; }
.support-panel-cta p { max-width: 330px; margin: 0; color: var(--muted); font-size: 11px; line-height: 1.65; text-align: right; }
.support-panel-cta strong { color: var(--text); }
.support-cta-control { display: flex; align-items: center; gap: 8px; flex: 0 0 auto; }
.support-cta-control > span { color: var(--blue); font-size: 26px; font-weight: 850; }
.support-cta-control .button { min-height: 38px; padding-inline: 15px; font-size: 12px; }
.support-qr-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 12px; }
.support-qr-card { overflow: hidden; margin: 0; padding: 12px; border: 1px solid #d8dee9; border-radius: 13px; background: rgba(255, 255, 255, .97); text-align: center; }
.support-qr-card > span { display: inline-flex; margin-bottom: 8px; padding: 4px 9px; border-radius: 999px; color: #047857; background: rgba(16, 185, 129, .12); font-size: 10px; font-weight: 750; }
.support-qr-card--alipay > span { color: #0369a1; background: rgba(14, 165, 233, .12); }
.support-qr-card img { width: 100%; height: 280px; object-fit: contain; border-radius: 8px; background: #fff; cursor: zoom-in; }
.support-qr-card figcaption { margin-top: 8px; color: #475569; font-size: 10px; }
.modal-support-form { margin-top: 16px; padding: 16px; border: 1px solid var(--line); border-radius: 13px; background: var(--panel); }
.form-field-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 12px; }
.form-field { display: grid; gap: 7px; color: var(--muted); font-size: 11px; }
.form-field input { width: 100%; min-height: 44px; padding: 0 13px; border: 1px solid var(--line); border-radius: 10px; outline: none; color: var(--text); background: var(--bg); }
.form-field input:focus { border-color: var(--blue); box-shadow: 0 0 0 3px color-mix(in srgb, var(--blue) 16%, transparent); }
.payment-channel-field { display: flex; align-items: center; gap: 18px; margin: 14px 0 0; padding: 0; border: 0; color: var(--muted); font-size: 11px; }
.payment-channel-field legend { float: left; margin-right: 8px; }
.payment-channel-field label { display: inline-flex; align-items: center; gap: 6px; }
.payment-channel-field input { accent-color: var(--blue); }
.website-field { position: absolute !important; left: -10000px !important; width: 1px !important; height: 1px !important; overflow: hidden !important; }
.support-privacy { margin: 13px 0 0; color: var(--weak); font-size: 10px; line-height: 1.6; }
.support-submit { margin-top: 12px; }
.support-submit:disabled { cursor: wait; opacity: .62; }
.form-status { min-height: 20px; margin: 8px 0 0; color: var(--muted); font-size: 11px; }
.form-status.is-success { color: var(--green); }
.form-status.is-error { color: var(--red); }
.contact-list { display: grid; gap: 8px; margin: 15px 0; }
.contact-list button, .contact-list a { width: 100%; min-height: 42px; padding: 8px 11px; display: flex; align-items: center; justify-content: space-between; gap: 12px; border: 1px solid var(--line); border-radius: 10px; color: var(--text); background: var(--panel); cursor: pointer; }
.contact-list button:hover, .contact-list a:hover, .contact-list button.is-copied { border-color: var(--blue); }
.contact-list span { color: var(--muted); font-size: 10px; }
.contact-list strong { min-width: 0; overflow-wrap: anywhere; font-size: 11px; }
.qq-group-card { margin: 0; padding: 12px; display: grid; grid-template-columns: 96px minmax(0, 1fr); gap: 12px; align-items: center; border: 1px solid var(--line); border-radius: 12px; background: var(--panel); }
.qq-group-card > img { width: 96px; height: 96px; border-radius: 8px; object-fit: contain; background: #fff; cursor: zoom-in; }
.qq-group-card figcaption { min-width: 0; display: grid; gap: 3px; }
.qq-group-card strong { font-size: 12px; }
.qq-group-card span { color: var(--muted); font-size: 10px; }
.qq-group-card .button { min-height: 32px; margin-top: 5px; padding-inline: 9px; font-size: 10px; }
.support-board-link { display: inline-flex; margin-top: 14px; color: var(--blue); font-size: 11px; font-weight: 750; }
.modal--image { z-index: 120; }
.image-modal__card { position: relative; z-index: 1; width: min(620px, 100%); max-height: calc(100vh - 48px); padding: 24px; display: grid; justify-items: center; gap: 15px; overflow: auto; border: 1px solid var(--line); border-radius: 22px; background: var(--panel); box-shadow: var(--shadow); }
.image-modal__card > img { max-width: 100%; max-height: calc(100vh - 150px); border-radius: 14px; object-fit: contain; background: #fff; }
.image-modal__card h2 { margin: 0; padding-inline: 48px; font-size: 16px; text-align: center; }
.noscript { position: fixed; z-index: 200; left: 16px; right: 16px; bottom: 16px; padding: 12px 16px; border-radius: 12px; background: #f59e0b; color: #21140a; text-align: center; font-weight: 700; }
.reveal { opacity: 0; transform: translateY(18px); transition: opacity .65s ease, transform .65s ease; }.reveal.is-visible { opacity: 1; transform: none; }

@media (max-width: 1140px) {
  .site-nav { position: absolute; top: 66px; left: 24px; right: 24px; display: none; padding: 12px; border: 1px solid var(--line); border-radius: 16px; background: var(--panel); box-shadow: var(--shadow); }
  .site-nav.is-open { display: grid; }.site-nav a { padding: 12px; }.nav-toggle { display: block; margin-left: auto; }.header-actions .button { display: none; }
  .hero { min-height: auto; grid-template-columns: 1fr; gap: 80px; padding-top: 86px; }.hero__content { max-width: 800px; }.hero__visual { width: min(760px, 100%); margin-inline: auto; }.product-window { min-width: 0; transform: none; }
  .feature-grid { grid-template-columns: repeat(2, 1fr); }.privacy-card { grid-template-columns: 126px 1fr; }.privacy-card__facts { grid-column: 1 / -1; }.workflow-list { grid-template-columns: repeat(2, 1fr); }.workflow-list li:nth-child(3) { border-left: 0; }.site-footer { grid-template-columns: 1fr auto; }.site-footer p { order: 3; }.site-footer > small { order: 4; text-align: right; }
  .support-modal-layout { grid-template-columns: 1fr; }
}

@media (max-width: 760px) {
  .section-shell, .site-header__inner { width: min(100% - 30px, var(--max-width)); }.site-header__inner { min-height: 66px; }.brand__copy small, .theme-toggle__label { display: none; }.theme-toggle { padding: 8px; }.header-actions { gap: 2px; }
  .section { padding-block: 78px; }.hero { padding-block: 68px 58px; gap: 58px; }.hero h1 { font-size: clamp(44px, 14vw, 62px); }.hero__lead { font-size: 16px; }.hero__actions { display: grid; }.hero__proof { gap: 10px 18px; }
  .product-window__tabs span:nth-child(n+3), .product-window__search { display: none; }.product-window__topbar { height: 45px; }.product-window__body { height: calc(100% - 45px); padding: 14px; }.preview-grid { grid-template-columns: repeat(3, 160px); overflow: hidden; }.visual-note { display: none; }
  .trust-strip { grid-template-columns: repeat(2, 1fr); }.trust-strip span { padding: 17px 8px; font-size: 11px; }.trust-strip span:last-child { grid-column: 1 / -1; }.trust-strip span:nth-child(3)::before, .trust-strip span:nth-child(5)::before { display: none; }
  .section-heading { grid-template-columns: 1fr; gap: 16px; margin-bottom: 30px; }.section-heading h2 { font-size: 36px; }.section-heading > p { font-size: 14px; }
  .demo-shell { border-radius: 16px; }.demo-shell__toolbar { padding-inline: 12px; }.demo-shell__address { display: none; }.demo-shell__actions { margin-left: auto; }.demo-shell__stage { min-height: 520px; aspect-ratio: auto; }.demo-poster { grid-template-columns: 1fr; padding: 32px 24px; }.demo-poster__map { display: none; }.demo-poster__copy h3 { font-size: 38px; }.demo-shell__footer span:last-child { display: none; }
  .feature-grid { grid-template-columns: 1fr; }.feature-card--wide { grid-column: auto; }.feature-card { min-height: 280px; }.workflow-list { grid-template-columns: 1fr; }.workflow-list li { min-height: 180px; border-left: 0 !important; }.workflow-list li + li { border-top: 0; }
  .privacy-card, .support-card { margin-bottom: 78px; padding: 26px; }.privacy-card { grid-template-columns: 1fr; }.privacy-card__mark { width: 82px; height: 82px; border-radius: 24px; font-size: 21px; }.privacy-card__facts { grid-column: auto; }.support-card { grid-template-columns: 1fr; }.support-card__actions { min-width: 0; }.download-banner { margin-bottom: 72px; padding: 34px 26px; display: grid; }.download-banner h2 { font-size: 35px; }
  .site-footer { grid-template-columns: 1fr; gap: 18px; }.site-footer p, .site-footer > small { order: initial; text-align: left; }.site-footer nav { flex-wrap: wrap; }
  .modal { padding: 8px; }.modal__card { max-height: calc(100vh - 16px); padding: 24px 18px; border-radius: 18px; }.modal__card h2 { font-size: 29px; }.release-card__stable { display: none; }.modal__meta { display: grid; }.support-codes { gap: 10px; }.support-codes figure { padding: 8px; }.support-codes figcaption span { display: none; }
  .modal__card--download-support { width: 100%; max-height: calc(100vh - 16px); }
  .download-support__heading { align-items: flex-start; }.download-support__logo { width: 48px; height: 48px; border-radius: 13px; }.download-support__heading h2 { font-size: 23px; }
  .download-file-card, .support-panel-title { align-items: stretch; flex-direction: column; }
  .download-file-card .button { width: 100%; }
  .support-panel-cta { width: 100%; justify-content: space-between; margin-left: 0; }.support-panel-cta p { max-width: none; text-align: left; }
  .support-payment-panel, .support-contact-panel { padding: 16px; }
  .support-qr-grid, .form-field-grid { grid-template-columns: 1fr; }
  .support-qr-card img { height: min(330px, 72vw); }
  .payment-channel-field { align-items: flex-start; flex-wrap: wrap; }
}

@media (max-width: 480px) {
  .download-support__heading { padding-right: 38px; }
  .download-support__logo { display: none; }
  .support-panel-cta { display: grid; }
  .support-cta-control { justify-content: flex-end; }
  .qq-group-card { grid-template-columns: 82px minmax(0, 1fr); }
  .qq-group-card > img { width: 82px; height: 82px; }
  .image-modal__card { padding: 18px; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation-duration: .01ms !important; animation-iteration-count: 1 !important; transition-duration: .01ms !important; }
  .reveal { opacity: 1; transform: none; }
}