:root{--bg-primary: #1b1c1e;--bg-secondary: #232428;--bg-tertiary: #2b2c30;--bg-inset: #161619;--bg-stage: #121316;--text-primary: #e4e5e7;--text-secondary: #9a9b9e;--text-muted: #6b6c70;--accent: #9aa3ad;--accent-hover: #c4ccd4;--accent-on-dark: #1b1c1e;--border: #35363a;--success: #3fb950;--warning: #d29922;--error: #f85149;--step-accent: var(--accent);--step-active: var(--warning);--step-done: var(--success);--radius-sm: 3px;--radius-md: 5px;--radius-lg: 8px;--spacing-xs: 4px;--spacing-sm: 8px;--spacing-md: 16px;--spacing-lg: 24px;--spacing-xl: 48px;--spacing-2xl: clamp(64px, 10vw, 112px);--font-sans: "Alibaba PuHuiTi", "PingFang SC", -apple-system, BlinkMacSystemFont, "Segoe UI", system-ui, sans-serif;--font-mono: "JetBrains Mono", "SF Mono", ui-monospace, monospace;--text-display: clamp(2.25rem, 5vw, 3.5rem);--text-section: clamp(1.5rem, 2.8vw, 2rem);--shadow-outline: 0 0 0 1px color-mix(in srgb, var(--border) 80%, transparent);--shadow-cine: 0 32px 64px rgba(0, 0, 0, .55);--focus-ring: 0 0 0 2px color-mix(in srgb, var(--accent) 55%, transparent);--z-sticky: 40;--z-dropdown: 50;--z-skip: 100;--transition: .15s ease;--ease-out: cubic-bezier(.22, 1, .36, 1)}@media(prefers-reduced-motion:reduce){:root{--transition: 0ms}}*,*:before,*:after{box-sizing:border-box}html{scroll-behavior:smooth}@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}}body{margin:0;font-family:var(--font-sans);font-size:16px;line-height:1.6;color:var(--text-primary);background:var(--bg-stage);-webkit-font-smoothing:antialiased}img{max-width:100%;height:auto;display:block}a{color:inherit;text-decoration:none}a:focus-visible,button:focus-visible,summary:focus-visible{outline:none;box-shadow:var(--focus-ring)}.skip-link{position:absolute;left:-9999px;top:0;z-index:var(--z-skip);padding:var(--spacing-sm) var(--spacing-md);background:var(--accent);color:var(--accent-on-dark);border-radius:var(--radius-sm)}.skip-link:focus{left:var(--spacing-md);top:var(--spacing-sm)}.container{width:min(1120px,100% - 2 * var(--spacing-lg));margin-inline:auto}.container--wide{width:min(1280px,100% - 2 * var(--spacing-md));margin-inline:auto}.section{padding-block:var(--spacing-2xl)}.section-heading{font-size:var(--text-section);font-weight:600;line-height:1.25;letter-spacing:-.03em;text-wrap:balance;margin:0 0 var(--spacing-xl);color:var(--text-primary)}.mono{font-family:var(--font-mono);font-size:.8125em;letter-spacing:.02em}.cine-frame{position:relative;overflow:hidden;border-radius:var(--radius-md);background:var(--bg-inset);box-shadow:var(--shadow-cine);transition:box-shadow var(--transition)}.cine-frame:before{content:"";position:absolute;inset:0;z-index:1;pointer-events:none;background:radial-gradient(ellipse 90% 80% at 50% 45%,transparent 35%,rgba(0,0,0,.65) 100%)}.cine-frame:after{content:"";position:absolute;inset:0;z-index:2;pointer-events:none;box-shadow:var(--shadow-outline);border-radius:inherit}.cine-frame:hover{box-shadow:0 36px 72px #0009}.cine-frame img,.cine-frame video{width:100%;height:auto;vertical-align:middle}.cine-frame--wide{aspect-ratio:21 / 9}.cine-frame--wide img,.cine-frame--wide video{height:100%;object-fit:cover;object-position:top center}@keyframes rise-fade{0%{opacity:0;transform:translateY(12px)}to{opacity:1;transform:translateY(0)}}@keyframes fade-soft{0%{opacity:0}to{opacity:1}}.btn{display:inline-flex;align-items:center;justify-content:center;min-height:44px;padding:10px 22px;border:none;border-radius:var(--radius-sm);font-family:inherit;font-size:15px;font-weight:500;cursor:pointer;transition:background-color var(--transition),color var(--transition),box-shadow var(--transition)}.btn--primary{background:var(--accent);color:var(--accent-on-dark)}.btn--primary:hover{background:var(--accent-hover)}.btn--secondary{background:transparent;color:var(--text-primary);box-shadow:var(--shadow-outline)}.btn--secondary:hover{background:color-mix(in srgb,var(--accent) 10%,transparent)}.lang-toggle{display:inline-flex;gap:2px;padding:2px;border-radius:var(--radius-sm);background:color-mix(in srgb,var(--text-primary) 6%,transparent)}.lang-toggle button{border:none;background:transparent;color:var(--text-secondary);font:inherit;font-size:13px;padding:4px 10px;border-radius:var(--radius-sm);cursor:pointer;transition:background-color var(--transition),color var(--transition)}.lang-toggle button[aria-pressed=true]{background:var(--bg-tertiary);color:var(--text-primary)}@media(max-width:767px){.section{padding-block:clamp(48px,12vw,72px)}}@media(prefers-reduced-motion:no-preference){.btn{transition:background-color var(--transition),color var(--transition),box-shadow var(--transition),transform var(--transition)}.btn:hover{transform:translateY(-1px)}.hero__panel{opacity:0;animation:rise-fade .65s var(--ease-out) 80ms forwards}.pipeline__item{opacity:0;animation:rise-fade .5s var(--ease-out) forwards}.pipeline__item:nth-child(2){animation-delay:60ms}.pipeline__item:nth-child(3){animation-delay:.12s}.pipeline__item:nth-child(4){animation-delay:.18s}.pipeline__item:nth-child(5){animation-delay:.24s}.feature{opacity:0;animation:fade-soft .65s var(--ease-out) forwards}.feature:nth-child(1){animation-delay:40ms}.feature:nth-child(2){animation-delay:.12s}.feature:nth-child(3){animation-delay:.2s}.feature:nth-child(4){animation-delay:.28s}}