:root {
  color-scheme: dark;
  --bg: #050c11;
  --bg-2: #07131a;
  --surface: #0b1720;
  --surface-2: #0e1d27;
  --surface-3: #122531;
  --line: rgba(155, 196, 213, .16);
  --line-strong: rgba(155, 196, 213, .28);
  --text: #eef8fb;
  --muted: #9bb2bd;
  --muted-2: #718b97;
  --cyan: #49d9e8;
  --cyan-soft: rgba(73, 217, 232, .12);
  --blue: #567cff;
  --blue-soft: rgba(86, 124, 255, .13);
  --green: #82edb2;
  --amber: #ffc46b;
  --danger: #ff7c7c;
  --shadow: 0 24px 80px rgba(0, 0, 0, .45);
  --radius-sm: 12px;
  --radius: 20px;
  --radius-lg: 30px;
  --shell: 1180px;
  --font-sans: "Segoe UI Variable Text", "Segoe UI", "Microsoft YaHei UI", "Noto Sans SC", system-ui, sans-serif;
  --font-display: "Segoe UI Variable Display", "Segoe UI", "Microsoft YaHei UI", system-ui, sans-serif;
  --font-mono: "Cascadia Code", "Cascadia Mono", Consolas, "SFMono-Regular", monospace;
}

*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  min-width: 320px;
  overflow-x: hidden;
  background:
    radial-gradient(900px 600px at 82% -8%, rgba(34, 145, 188, .16), transparent 70%),
    radial-gradient(760px 560px at 102% 35%, rgba(59, 80, 220, .14), transparent 72%),
    var(--bg);
  color: var(--text);
  font-family: var(--font-sans);
  font-size: 17px;
  line-height: 1.65;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
}
body::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: -1;
  pointer-events: none;
  opacity: .38;
  background-image:
    linear-gradient(rgba(118, 170, 192, .045) 1px, transparent 1px),
    linear-gradient(90deg, rgba(118, 170, 192, .045) 1px, transparent 1px);
  background-size: 54px 54px;
  mask-image: linear-gradient(to bottom, black, transparent 82%);
}
::selection { color: #061116; background: var(--cyan); }
h1, h2, h3, h4, p, ul, ol, figure, blockquote { margin-top: 0; }
h1, h2, h3, h4 { font-family: var(--font-display); line-height: 1.08; letter-spacing: -.035em; }
h1 { font-size: clamp(3.1rem, 7.1vw, 6.6rem); font-weight: 700; }
h2 { font-size: clamp(2.15rem, 4.4vw, 4rem); font-weight: 680; }
h3 { font-size: clamp(1.35rem, 2.2vw, 1.8rem); font-weight: 650; }
p { color: var(--muted); }
a { color: inherit; text-decoration-thickness: 1px; text-underline-offset: 4px; }
img, svg { display: block; max-width: 100%; }
button, input, textarea, select { font: inherit; }
button { color: inherit; }
:focus-visible { outline: 2px solid var(--cyan); outline-offset: 4px; border-radius: 4px; }
[hidden] { display: none !important; }

.shell { width: min(var(--shell), calc(100% - 48px)); margin-inline: auto; }
.narrow { width: min(820px, calc(100% - 48px)); margin-inline: auto; }
.sr-only { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0, 0, 0, 0); white-space: nowrap; border: 0; }
.skip-link { position: fixed; left: 16px; top: 12px; z-index: 1000; padding: 10px 16px; color: #051116; background: var(--cyan); border-radius: 8px; font-weight: 700; transform: translateY(-160%); transition: transform .2s ease; }
.skip-link:focus { transform: translateY(0); }

.icon { width: 1.2em; height: 1.2em; flex: 0 0 auto; fill: none; stroke: currentColor; stroke-width: 1.8; stroke-linecap: round; stroke-linejoin: round; }
.mono { font-family: var(--font-mono); }
.muted { color: var(--muted); }
.accent { color: var(--cyan); }
.nowrap { white-space: nowrap; }
.lede { font-size: clamp(1.08rem, 1.5vw, 1.25rem); line-height: 1.7; color: #b8cbd3; }

.topbar { border-bottom: 1px solid var(--line); background: rgba(4, 12, 17, .84); color: var(--muted); font-size: .78rem; letter-spacing: .04em; }
.topbar-inner { min-height: 34px; display: flex; align-items: center; justify-content: space-between; gap: 18px; }
.topbar p { margin: 0; color: inherit; }
.topbar-pill { color: var(--cyan); font-family: var(--font-mono); font-weight: 700; letter-spacing: .08em; }
.topbar-right { color: var(--muted-2); }
.site-header { position: sticky; top: 0; z-index: 100; border-bottom: 1px solid transparent; background: rgba(5, 12, 17, .62); backdrop-filter: blur(18px) saturate(130%); transition: background .25s ease, border-color .25s ease; }
.site-header.is-scrolled { background: rgba(5, 12, 17, .92); border-color: var(--line); }
.header-inner { height: 76px; display: flex; align-items: center; justify-content: space-between; gap: 24px; }
.brand { display: inline-flex; align-items: center; gap: 11px; text-decoration: none; flex: 0 0 auto; }
.brand-mark { width: 42px; height: 42px; border-radius: 12px; box-shadow: 0 0 28px rgba(73, 217, 232, .2); }
.brand-copy { display: flex; flex-direction: column; line-height: 1.06; font-size: 1.12rem; font-weight: 700; letter-spacing: -.02em; }
.brand-copy small { margin-top: 5px; color: var(--muted-2); font-family: var(--font-mono); font-size: .58rem; font-weight: 500; letter-spacing: .08em; text-transform: uppercase; }
.nav { display: flex; align-items: center; gap: 4px; }
.nav-link { padding: 9px 12px; border-radius: 9px; color: #b7cbd4; text-decoration: none; font-size: .88rem; font-weight: 600; white-space: nowrap; transition: color .2s, background .2s; }
.nav-link:hover, .nav-link[aria-current="page"] { color: var(--text); background: rgba(159, 205, 222, .07); }
.header-actions { display: flex; align-items: center; gap: 9px; }
.lang-pill { display: inline-grid; place-items: center; min-width: 42px; height: 36px; padding: 0 10px; border: 1px solid var(--line); border-radius: 99px; color: var(--muted); text-decoration: none; font-size: .78rem; font-weight: 700; }
.lang-pill:hover { color: var(--text); border-color: var(--line-strong); }
.menu-toggle { display: none; width: 42px; height: 42px; padding: 0; border: 1px solid var(--line); border-radius: 11px; background: var(--surface); cursor: pointer; }
.menu-toggle span, .menu-toggle span::before, .menu-toggle span::after { display: block; width: 18px; height: 1.5px; margin: auto; background: currentColor; transition: .2s ease; content: ""; }
.menu-toggle span::before { transform: translateY(-6px); }
.menu-toggle span::after { transform: translateY(5px); }
.nav-open .menu-toggle span { background: transparent; }
.nav-open .menu-toggle span::before { transform: rotate(45deg); }
.nav-open .menu-toggle span::after { transform: translateY(-1px) rotate(-45deg); }

.btn { display: inline-flex; align-items: center; justify-content: center; gap: 9px; min-height: 50px; padding: 0 20px; border: 1px solid transparent; border-radius: 12px; color: var(--text); background: transparent; text-decoration: none; font-weight: 700; font-size: .91rem; letter-spacing: -.01em; cursor: pointer; transition: transform .2s ease, background .2s ease, border-color .2s ease, box-shadow .2s ease; }
.btn:hover { transform: translateY(-2px); }
.btn-primary { color: #031116; background: var(--cyan); box-shadow: 0 10px 36px rgba(73, 217, 232, .2); }
.btn-primary:hover { background: #75e7f1; box-shadow: 0 14px 42px rgba(73, 217, 232, .27); }
.btn-secondary { border-color: var(--line-strong); background: rgba(10, 24, 32, .7); color: #d9e8ee; }
.btn-secondary:hover { border-color: rgba(111, 220, 234, .48); background: var(--surface-2); }
.btn-small { min-height: 38px; padding-inline: 14px; border-radius: 9px; font-size: .8rem; }
.btn-store .icon { width: 17px; height: 17px; }
.btn-group { display: flex; flex-wrap: wrap; gap: 12px; }

.eyebrow, .kicker { display: inline-flex; align-items: center; gap: 9px; margin-bottom: 18px; color: var(--cyan); font-family: var(--font-mono); font-size: .72rem; font-weight: 700; letter-spacing: .11em; text-transform: uppercase; }
.eyebrow::before { content: ""; width: 22px; height: 1px; background: var(--cyan); box-shadow: 0 0 9px var(--cyan); }
.kicker { display: block; color: var(--muted-2); letter-spacing: .14em; }

.hero { position: relative; padding: clamp(58px, 8vw, 104px) 0 54px; }
.hero-grid { display: grid; grid-template-columns: minmax(0, .88fr) minmax(520px, 1.12fr); gap: clamp(34px, 4vw, 64px); align-items: center; }
.hero-title { margin-bottom: 24px; max-width: 700px; text-wrap: balance; }
.hero-title .dim { color: #84a0ac; }
.hero-title .grad { color: transparent; background: linear-gradient(95deg, #f4fdff 10%, #6be3ef 52%, #7895ff 95%); -webkit-background-clip: text; background-clip: text; }
html[lang^="zh"] .hero-title { font-size: clamp(3rem, 5vw, 4.8rem); }
html[lang^="zh"] .hero-title .grad { display: block; }
.hero-lead { max-width: 620px; margin-bottom: 29px; }
.hero-actions { margin-bottom: 26px; }
.trust-row { display: flex; flex-wrap: wrap; gap: 8px 14px; padding: 0; margin: 0; list-style: none; color: var(--muted); font-size: .78rem; }
.trust-row li { display: inline-flex; align-items: center; gap: 7px; }
.trust-row li::before { content: ""; width: 5px; height: 5px; border-radius: 50%; background: var(--green); box-shadow: 0 0 8px rgba(130, 237, 178, .55); }
.hero-visual { position: relative; padding: 12px 0 20px; }
.hero-visual::before { content: ""; position: absolute; inset: 8% -4% -8% 8%; border-radius: 50%; background: radial-gradient(circle, rgba(44, 164, 205, .22), rgba(41, 64, 191, .12) 42%, transparent 70%); filter: blur(30px); pointer-events: none; }
.app-window { position: relative; overflow: hidden; border: 1px solid rgba(122, 192, 213, .28); border-radius: 18px; background: #081219; box-shadow: 0 36px 100px rgba(0, 0, 0, .55), 0 0 0 1px rgba(73, 217, 232, .05) inset; transform: perspective(1200px) rotateY(-2deg) rotateX(1deg); }
.app-window-bar { height: 39px; display: flex; align-items: center; gap: 8px; padding: 0 14px; border-bottom: 1px solid var(--line); background: #09151d; }
.window-dots { display: flex; gap: 5px; }
.window-dots i { width: 7px; height: 7px; border-radius: 50%; background: #35505c; }
.window-dots i:first-child { background: #5c7b88; }
.app-window-label { margin-left: 5px; color: #6e8d9a; font-family: var(--font-mono); font-size: .6rem; letter-spacing: .08em; text-transform: uppercase; }
.app-shot { width: 100%; aspect-ratio: 16 / 9; object-fit: cover; }
.float-tag { position: absolute; z-index: 2; display: flex; align-items: center; gap: 8px; padding: 9px 12px; border: 1px solid rgba(104, 178, 201, .28); border-radius: 10px; background: rgba(7, 19, 27, .9); box-shadow: 0 12px 34px rgba(0, 0, 0, .35); backdrop-filter: blur(10px); color: #cfe2e9; font-family: var(--font-mono); font-size: .66rem; letter-spacing: .04em; white-space: nowrap; }
.float-tag b { color: var(--cyan); font-weight: 700; }
.float-tag-one { left: -22px; top: 24%; }
.float-tag-two { right: -16px; bottom: 10%; }
.float-tag .signal { width: 7px; height: 7px; border-radius: 50%; background: var(--green); box-shadow: 0 0 10px rgba(130, 237, 178, .8); }

.stat-strip { display: grid; grid-template-columns: repeat(4, 1fr); margin-top: 34px; border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.stat { padding: 24px 22px; border-right: 1px solid var(--line); }
.stat:last-child { border-right: 0; }
.stat strong { display: block; color: var(--text); font-family: var(--font-display); font-size: 1.5rem; line-height: 1.1; letter-spacing: -.03em; }
.stat span { display: block; margin-top: 7px; color: var(--muted-2); font-family: var(--font-mono); font-size: .65rem; letter-spacing: .07em; text-transform: uppercase; }.section { padding: clamp(72px, 10vw, 120px) 0; }
.section-tight { padding: clamp(56px, 7vw, 84px) 0; }
.section-rule { border-top: 1px solid var(--line); }
.section-head { display: grid; grid-template-columns: minmax(0, 1fr) minmax(280px, .5fr); align-items: end; gap: 48px; margin-bottom: 42px; }
.section-title { margin-bottom: 0; max-width: 800px; text-wrap: balance; }
.section-copy { margin-bottom: 4px; font-size: 1rem; }
.section-copy p:last-child { margin-bottom: 0; }
.section-actions { margin-top: 22px; }

.format-grid { display: grid; grid-template-columns: repeat(7, 1fr); gap: 10px; }
.format-card { min-width: 0; padding: 19px 16px 16px; border: 1px solid var(--line); border-radius: 14px; background: linear-gradient(145deg, rgba(16, 37, 48, .8), rgba(7, 17, 23, .72)); }
.format-card strong { display: block; color: var(--text); font-family: var(--font-mono); font-size: 1.05rem; }
.format-card span { display: block; margin-top: 5px; color: var(--muted-2); font-size: .66rem; line-height: 1.4; }
.format-grid + .format-note { margin: 17px 0 0; color: var(--muted-2); font-size: .78rem; }

.bento { display: grid; grid-template-columns: repeat(12, 1fr); gap: 14px; }
.feature-card { position: relative; overflow: hidden; min-height: 250px; padding: 26px; border: 1px solid var(--line); border-radius: var(--radius); background: linear-gradient(150deg, rgba(15, 34, 44, .9), rgba(7, 17, 23, .88)); }
.feature-card::after { content: ""; position: absolute; right: -80px; bottom: -110px; width: 260px; height: 260px; border-radius: 50%; background: radial-gradient(circle, rgba(73, 217, 232, .09), transparent 66%); pointer-events: none; }
.feature-wide { grid-column: span 7; }
.feature-half { grid-column: span 5; }
.feature-third { grid-column: span 4; }
.feature-quarter { grid-column: span 3; }
.feature-card h3 { margin: 18px 0 10px; }
.feature-card p { margin-bottom: 0; font-size: .93rem; }
.feature-icon { display: grid; place-items: center; width: 42px; height: 42px; border: 1px solid rgba(73, 217, 232, .25); border-radius: 11px; color: var(--cyan); background: var(--cyan-soft); }
.feature-icon .icon { width: 21px; height: 21px; }
.feature-tags { display: flex; flex-wrap: wrap; gap: 7px; margin-top: 18px; }
.tag { display: inline-flex; align-items: center; gap: 6px; padding: 5px 9px; border: 1px solid var(--line); border-radius: 6px; color: #9ab3be; font-family: var(--font-mono); font-size: .58rem; letter-spacing: .05em; text-transform: uppercase; }
.tag.cyan { border-color: rgba(73, 217, 232, .24); color: var(--cyan); background: rgba(73, 217, 232, .07); }
.tag.pro { border-color: rgba(255, 196, 107, .26); color: var(--amber); background: rgba(255, 196, 107, .06); }
.feature-line { height: 1px; margin-top: 20px; background: linear-gradient(90deg, var(--line-strong), transparent); }
.feature-metric { display: flex; align-items: flex-end; justify-content: space-between; gap: 12px; margin-top: 18px; }
.feature-metric strong { color: var(--text); font-family: var(--font-mono); font-size: 1.15rem; }
.feature-metric span { color: var(--muted-2); font-size: .68rem; }

.showcase-grid { display: grid; grid-template-columns: 1.35fr .65fr; gap: 14px; }
.showcase-grid .shot-card:first-child { grid-row: span 2; }
.shot-card { position: relative; overflow: hidden; display: flex; flex-direction: column; border: 1px solid var(--line); border-radius: var(--radius); background: var(--surface); }
.shot-button { display: block; padding: 0; border: 0; background: transparent; cursor: zoom-in; text-align: left; }
.shot-button img { width: 100%; height: 100%; aspect-ratio: 16 / 9; object-fit: cover; transition: transform .5s cubic-bezier(.2,.7,.2,1), filter .3s; }
.shot-card:first-child .shot-button, .shot-card:first-child img { height: 100%; }
.shot-button:hover img { transform: scale(1.015); filter: brightness(1.06); }
.shot-caption { display: flex; align-items: flex-start; justify-content: space-between; gap: 16px; padding: 14px 17px; border-top: 1px solid var(--line); }
.shot-caption strong { display: block; font-size: .84rem; }
.shot-caption span { display: block; margin-top: 3px; color: var(--muted-2); font-size: .68rem; }
.shot-index { color: var(--cyan); font-family: var(--font-mono); font-size: .61rem; letter-spacing: .08em; }
.shot-tag { position: absolute; top: 12px; left: 12px; z-index: 2; padding: 5px 8px; border: 1px solid rgba(130, 237, 178, .22); border-radius: 6px; color: var(--green); background: rgba(5, 18, 16, .82); font-family: var(--font-mono); font-size: .56rem; letter-spacing: .08em; text-transform: uppercase; backdrop-filter: blur(8px); }

.pro-section { position: relative; overflow: hidden; }
.pro-section::before { content: ""; position: absolute; inset: 10% 35% 0 0; background: radial-gradient(circle, rgba(255, 196, 107, .09), transparent 64%); pointer-events: none; }
.pro-panel { position: relative; display: grid; grid-template-columns: .86fr 1.14fr; gap: 44px; align-items: center; padding: clamp(26px, 4vw, 48px); border: 1px solid rgba(255, 196, 107, .18); border-radius: var(--radius-lg); background: linear-gradient(140deg, rgba(35, 28, 17, .5), rgba(8, 19, 25, .9) 42%, rgba(9, 22, 31, .96)); box-shadow: var(--shadow); }
.pro-visual { overflow: hidden; border: 1px solid rgba(255, 196, 107, .14); border-radius: 19px; background: #071118; box-shadow: 0 22px 60px rgba(0, 0, 0, .35); }
.pro-copy .eyebrow { color: var(--amber); }
.pro-copy .eyebrow::before { background: var(--amber); box-shadow: 0 0 9px var(--amber); }
.pro-copy h2 { margin-bottom: 18px; }
.pro-copy > p { margin-bottom: 24px; }
.check-list { display: grid; gap: 12px; padding: 0; margin: 0; list-style: none; }
.check-list li { display: flex; align-items: flex-start; gap: 11px; color: #c7d9e0; font-size: .91rem; }
.check-list li::before { content: ""; flex: 0 0 auto; width: 17px; height: 17px; margin-top: 3px; border: 1px solid rgba(130, 237, 178, .32); border-radius: 50%; background: radial-gradient(circle, var(--green) 0 3px, transparent 4px); }
.check-list strong { color: var(--text); }
.pro-note { margin: 20px 0 0; padding: 11px 13px; border-left: 2px solid rgba(255, 196, 107, .54); color: var(--muted-2); font-size: .76rem; background: rgba(255, 196, 107, .035); }
.price-note { color: var(--muted-2); font-size: .75rem; margin-top: 14px; }

.steps { display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px; counter-reset: step; }
.step { position: relative; min-height: 210px; padding: 25px; border: 1px solid var(--line); border-radius: var(--radius); background: rgba(9, 23, 31, .68); }
.step::before { counter-increment: step; content: "0" counter(step); display: block; margin-bottom: 36px; color: var(--cyan); font-family: var(--font-mono); font-size: .68rem; letter-spacing: .1em; }
.step h3 { margin-bottom: 10px; font-size: 1.22rem; }
.step p { margin-bottom: 0; font-size: .88rem; }

.faq-list { border-top: 1px solid var(--line); }
.faq-item { border-bottom: 1px solid var(--line); }
.faq-item summary { list-style: none; display: flex; align-items: center; justify-content: space-between; gap: 24px; padding: 22px 0; color: var(--text); cursor: pointer; font-family: var(--font-display); font-size: clamp(1.02rem, 1.7vw, 1.25rem); font-weight: 600; }
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary::after { content: "+"; flex: 0 0 auto; display: grid; place-items: center; width: 28px; height: 28px; border: 1px solid var(--line); border-radius: 50%; color: var(--cyan); font-family: var(--font-mono); font-size: 1rem; font-weight: 400; transition: transform .2s; }
.faq-item[open] summary::after { content: "−"; transform: rotate(180deg); }
.faq-answer { max-width: 900px; padding: 0 50px 24px 0; }
.faq-answer p { margin-bottom: 0; font-size: .93rem; }

.related-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px; }
.related-card { display: flex; flex-direction: column; justify-content: space-between; min-height: 160px; padding: 22px; border: 1px solid var(--line); border-radius: 17px; background: rgba(10, 24, 32, .72); text-decoration: none; transition: transform .2s, border-color .2s, background .2s; }
.related-card:hover { transform: translateY(-3px); border-color: rgba(73, 217, 232, .32); background: var(--surface-2); }
.related-card span { color: var(--muted-2); font-family: var(--font-mono); font-size: .61rem; letter-spacing: .08em; text-transform: uppercase; }
.related-card strong { display: block; margin: 18px 0 6px; font-family: var(--font-display); font-size: 1.07rem; line-height: 1.25; }
.related-card p { margin: 0; font-size: .78rem; }
.related-card .icon { align-self: flex-end; margin-top: 16px; color: var(--cyan); }

.cta-panel { position: relative; overflow: hidden; display: grid; grid-template-columns: 1fr auto; align-items: center; gap: 40px; padding: clamp(30px, 5vw, 58px); border: 1px solid rgba(73, 217, 232, .23); border-radius: var(--radius-lg); background: radial-gradient(700px 380px at 18% 0%, rgba(32, 143, 173, .27), transparent 70%), linear-gradient(135deg, #0d202a, #09141c 62%); box-shadow: var(--shadow); }
.cta-panel::after { content: ""; position: absolute; right: -90px; top: -150px; width: 440px; height: 440px; border: 1px solid rgba(73, 217, 232, .12); border-radius: 50%; box-shadow: 0 0 0 60px rgba(73, 217, 232, .025), 0 0 0 120px rgba(73, 217, 232, .018); pointer-events: none; }
.cta-panel h2 { position: relative; z-index: 1; margin-bottom: 12px; font-size: clamp(2rem, 4vw, 3.4rem); }
.cta-panel p { position: relative; z-index: 1; max-width: 680px; margin-bottom: 0; }
.cta-actions { position: relative; z-index: 1; display: flex; flex-direction: column; gap: 10px; min-width: 200px; }
.cta-actions small { color: var(--muted-2); text-align: center; font-size: .68rem; }

.breadcrumbs { padding-top: 26px; }
.breadcrumbs ol { display: flex; flex-wrap: wrap; gap: 7px; padding: 0; margin: 0; list-style: none; color: var(--muted-2); font-family: var(--font-mono); font-size: .64rem; letter-spacing: .04em; }
.breadcrumbs li:not(:last-child)::after { content: "/"; padding-left: 7px; color: #435863; }
.breadcrumbs a { text-decoration: none; }
.breadcrumbs a:hover { color: var(--cyan); }
.subhero { padding: 38px 0 clamp(60px, 8vw, 92px); }
.subhero-grid { display: grid; grid-template-columns: minmax(0, 1.05fr) minmax(360px, .65fr); gap: clamp(40px, 7vw, 88px); align-items: center; }
.subhero h1 { max-width: 850px; margin-bottom: 23px; font-size: clamp(2.8rem, 5.8vw, 5.2rem); text-wrap: balance; }
.subhero .lede { max-width: 720px; margin-bottom: 27px; }
.answer-card { padding: 25px; border: 1px solid rgba(73, 217, 232, .28); border-radius: var(--radius); background: linear-gradient(145deg, rgba(12, 35, 45, .9), rgba(6, 17, 23, .94)); box-shadow: 0 22px 60px rgba(0, 0, 0, .3); }
.answer-card-label { display: inline-flex; align-items: center; gap: 7px; margin-bottom: 14px; color: var(--cyan); font-family: var(--font-mono); font-size: .63rem; font-weight: 700; letter-spacing: .11em; text-transform: uppercase; }
.answer-card-label::before { content: ""; width: 6px; height: 6px; border-radius: 50%; background: var(--cyan); box-shadow: 0 0 9px var(--cyan); }
.answer-card h2 { margin-bottom: 13px; font-size: 1.35rem; letter-spacing: -.025em; }
.answer-card p { margin-bottom: 17px; color: #b8cbd3; font-size: .91rem; }
.answer-list { display: grid; gap: 9px; margin: 0; padding: 0; list-style: none; }
.answer-list li { display: flex; gap: 9px; color: var(--muted); font-size: .78rem; }
.answer-list li::before { content: "✓"; color: var(--green); font-family: var(--font-mono); }.article-section { padding: clamp(54px, 7vw, 88px) 0; }
.article-section + .article-section { border-top: 1px solid var(--line); }
.article-grid { display: grid; grid-template-columns: minmax(0, .7fr) minmax(0, 1.3fr); gap: clamp(32px, 6vw, 88px); align-items: start; }
.article-grid.reverse { grid-template-columns: minmax(0, 1.3fr) minmax(0, .7fr); }
.article-intro h2 { margin-bottom: 15px; font-size: clamp(2rem, 3.7vw, 3.2rem); }
.article-intro p:last-child { margin-bottom: 0; }
.article-body h2 { margin-bottom: 20px; font-size: clamp(1.8rem, 3.2vw, 2.65rem); }
.article-body h3 { margin: 32px 0 12px; font-size: 1.30rem; }
.article-body p, .article-body li { font-size: .97rem; }
.article-body p:last-child { margin-bottom: 0; }
.article-body ul, .article-body ol { padding-left: 22px; color: var(--muted); }
.article-body li + li { margin-top: 8px; }
.article-body strong { color: var(--text); }
.callout { padding: 18px 20px; margin: 24px 0; border: 1px solid var(--line); border-left: 2px solid var(--cyan); border-radius: 0 12px 12px 0; background: rgba(73, 217, 232, .04); }
.callout p { margin: 0; font-size: .88rem; }
.callout strong { color: var(--text); }
.spec-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 10px; }
.spec { padding: 17px; border: 1px solid var(--line); border-radius: 12px; background: rgba(8, 21, 28, .62); }
.spec span { display: block; color: var(--muted-2); font-family: var(--font-mono); font-size: .59rem; letter-spacing: .08em; text-transform: uppercase; }
.spec strong { display: block; margin-top: 5px; font-size: .88rem; }
.toc { position: sticky; top: 98px; padding: 20px; border: 1px solid var(--line); border-radius: 14px; background: rgba(9, 23, 31, .64); }
.toc strong { display: block; margin-bottom: 12px; font-family: var(--font-mono); font-size: .62rem; letter-spacing: .1em; text-transform: uppercase; color: var(--muted-2); }
.toc a { display: block; padding: 5px 0; color: var(--muted); text-decoration: none; font-size: .78rem; }
.toc a:hover { color: var(--cyan); }
.comparison-wrap { overflow-x: auto; border: 1px solid var(--line); border-radius: 14px; }
.comparison { width: 100%; min-width: 620px; border-collapse: collapse; font-size: .85rem; }
.comparison th, .comparison td { padding: 14px 16px; border-bottom: 1px solid var(--line); text-align: left; }
.comparison th { color: var(--muted-2); background: rgba(12, 30, 39, .8); font-family: var(--font-mono); font-size: .61rem; letter-spacing: .06em; text-transform: uppercase; }
.comparison tr:last-child td { border-bottom: 0; }
.comparison td:first-child { color: var(--text); font-weight: 600; }
.comparison .yes { color: var(--green); }
.comparison .no { color: var(--muted-2); }

.prose { max-width: 860px; }
.prose h1 { margin-bottom: 20px; font-size: clamp(2.8rem, 6vw, 5rem); }
.prose h2 { margin: 44px 0 14px; font-size: 1.8rem; }
.prose h3 { margin: 30px 0 10px; font-size: 1.2rem; }
.prose p, .prose li { color: var(--muted); }
.prose ul { padding-left: 20px; }
.prose .meta { color: var(--muted-2); font-family: var(--font-mono); font-size: .68rem; }
.legal-layout { display: grid; grid-template-columns: 260px minmax(0, 1fr); gap: 64px; align-items: start; }
.legal-layout .prose { max-width: 760px; }
.legal-layout .prose h1 { font-size: clamp(2.5rem, 5vw, 4.2rem); }

.site-footer { margin-top: 50px; border-top: 1px solid var(--line); background: rgba(3, 10, 14, .76); }
.footer-grid { display: grid; grid-template-columns: 1.6fr repeat(3, 1fr); gap: 42px; padding: 58px 0 46px; }
.footer-brand p { max-width: 340px; margin: 18px 0 20px; font-size: .83rem; }
.footer-brand .brand { font-size: 1rem; }
.footer-col h3 { margin-bottom: 16px; color: var(--muted-2); font-family: var(--font-mono); font-size: .61rem; letter-spacing: .1em; text-transform: uppercase; }
.footer-col a { display: block; width: fit-content; margin: 8px 0; color: #a9bdc6; text-decoration: none; font-size: .79rem; }
.footer-col a:hover { color: var(--cyan); }
.footer-bottom { display: flex; justify-content: space-between; gap: 30px; padding: 18px 0 28px; border-top: 1px solid var(--line); color: var(--muted-2); font-size: .68rem; }
.footer-bottom p { margin: 0; color: inherit; }
.footer-legal { max-width: 620px; }
.language-row { display: flex; gap: 9px; margin-top: 13px; }
.language-row a { display: inline-flex; padding: 4px 8px; border: 1px solid var(--line); border-radius: 5px; text-decoration: none; font-size: .66rem; }

.lightbox { width: min(1400px, 94vw); max-height: 94vh; padding: 0; border: 1px solid var(--line-strong); border-radius: 15px; background: #071118; color: var(--text); box-shadow: 0 40px 150px rgba(0, 0, 0, .8); }
.lightbox::backdrop { background: rgba(1, 5, 8, .82); backdrop-filter: blur(8px); }
.lightbox-inner { position: relative; padding: 12px; }
.lightbox img { width: 100%; max-height: calc(94vh - 68px); object-fit: contain; border-radius: 8px; background: #050c11; }
.lightbox-close { position: absolute; top: 20px; right: 20px; z-index: 1; display: grid; place-items: center; width: 38px; height: 38px; border: 1px solid var(--line-strong); border-radius: 50%; background: rgba(4, 13, 18, .88); color: var(--text); cursor: pointer; }
.lightbox-caption { padding: 2px 7px 4px; color: var(--muted); font-size: .74rem; }

.reveal { opacity: 0; transform: translateY(18px); transition: opacity .62s ease, transform .62s cubic-bezier(.2,.7,.2,1); }
.reveal.is-visible { opacity: 1; transform: none; }
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { scroll-behavior: auto !important; transition-duration: .01ms !important; animation-duration: .01ms !important; animation-iteration-count: 1 !important; }
  .reveal { opacity: 1; transform: none; }
}

@media (max-width: 1080px) {
  .header-inner { gap: 14px; }
  .nav-link { padding-inline: 9px; }
  .hero-grid { grid-template-columns: 1fr; gap: 38px; }
  .hero-copy { max-width: 800px; }
  .hero-visual { width: min(850px, 100%); }
  .format-grid { grid-template-columns: repeat(4, 1fr); }
  .feature-wide, .feature-half { grid-column: span 6; }
  .feature-third { grid-column: span 4; }
  .footer-grid { grid-template-columns: 1.4fr repeat(3, 1fr); gap: 28px; }
  .subhero-grid { grid-template-columns: 1fr; gap: 34px; }
  .answer-card { max-width: 720px; }
  .hero-visual::before { inset: 8% 0 -8% 0; }
  .article-grid.reverse { grid-template-columns: 1fr; gap: 32px; }
}

@media (max-width: 820px) {
  body { font-size: 16px; }
  .shell, .narrow { width: min(100% - 32px, var(--shell)); }
  .topbar-right { display: none; }
  .header-inner { height: 68px; }
  .menu-toggle { display: grid; place-items: center; }
  .nav { position: fixed; inset: 103px 16px auto 16px; z-index: 101; display: none; flex-direction: column; align-items: stretch; gap: 3px; padding: 14px; border: 1px solid var(--line-strong); border-radius: 15px; background: rgba(6, 17, 23, .98); box-shadow: var(--shadow); }
  .nav-open .nav { display: flex; }
  .nav-link { padding: 13px 12px; font-size: .95rem; }
  .header-actions .btn { display: none; }
  .header-actions .lang-pill { height: 38px; }
  .hero { padding-top: 48px; }
  .hero-title { font-size: clamp(3rem, 13vw, 5rem); }
  .float-tag { display: none; }
  .app-window { transform: none; }
  .stat-strip { grid-template-columns: repeat(2, 1fr); }
  .stat:nth-child(2) { border-right: 0; }
  .stat:nth-child(-n+2) { border-bottom: 1px solid var(--line); }
  .section-head { grid-template-columns: 1fr; gap: 18px; }
  .bento { grid-template-columns: repeat(6, 1fr); }
  .feature-wide, .feature-half { grid-column: span 6; }
  .feature-third { grid-column: span 3; }
  .showcase-grid { grid-template-columns: 1fr; }
  .showcase-grid .shot-card:first-child { grid-row: auto; }
  .pro-panel { grid-template-columns: 1fr; }
  .pro-visual { max-width: 700px; }
  .steps { grid-template-columns: 1fr; }
  .step { min-height: 0; }
  .step::before { margin-bottom: 20px; }
  .related-grid { grid-template-columns: repeat(2, 1fr); }
  .cta-panel { grid-template-columns: 1fr; }
  .cta-actions { align-items: flex-start; }
  .article-grid, .article-grid.reverse { grid-template-columns: 1fr; gap: 28px; }
  .toc { position: static; }
  .legal-layout { grid-template-columns: 1fr; gap: 24px; }
  .footer-grid { grid-template-columns: 1.4fr 1fr 1fr; }
  .footer-brand { grid-column: 1 / -1; }
}

@media (max-width: 580px) {
  .shell, .narrow { width: calc(100% - 28px); }
  .brand-mark { width: 37px; height: 37px; }
  .brand-copy { font-size: 1rem; }
  .brand-copy small { font-size: .51rem; }
  .topbar { font-size: .66rem; }
  .topbar-inner { justify-content: center; }
  .topbar-right { display: none; }
  .nav { top: 95px; inset-inline: 12px; }
  .hero-title { font-size: clamp(2.85rem, 15vw, 4.2rem); }
  html[lang^="zh"] .hero-title { font-size: clamp(2.45rem, 12vw, 3.6rem); }
  .hero-actions .btn { width: 100%; }
  .hero-actions .btn-group { width: 100%; }
  .stat { padding: 18px 14px; }
  .stat strong { font-size: 1.16rem; }
  .format-grid { grid-template-columns: repeat(2, 1fr); }
  .bento { grid-template-columns: 1fr; }
  .feature-wide, .feature-half, .feature-third, .feature-quarter { grid-column: auto; }
  .feature-card { min-height: 0; }
  .showcase-grid { gap: 10px; }
  .related-grid { grid-template-columns: 1fr; }
  .cta-actions { width: 100%; }
  .cta-actions .btn { width: 100%; }
  .footer-grid { grid-template-columns: repeat(2, 1fr); gap: 26px 18px; }
  .footer-brand { grid-column: 1 / -1; }
  .footer-bottom { flex-direction: column; gap: 12px; }
  .spec-grid { grid-template-columns: 1fr; }
  .faq-answer { padding-right: 0; }
  .subhero h1 { font-size: clamp(2.55rem, 12vw, 3.8rem); }
}

@media print {
  body { background: #fff; color: #111; }
  body::before, .site-header, .topbar, .site-footer, .cta-panel, .hero-visual, .btn { display: none !important; }
  p, h1, h2, h3 { color: #111; }
  .article-grid, .article-grid.reverse, .section-head { display: block; }
}