:root{--color-bg: #ffffff;--color-surface: #f8fafc;--color-border: #e2e8f0;--color-text: #0f172a;--color-text-secondary: #475569;--color-muted: #64748b;--color-accent: #1d4ed8;--color-accent-hover: #1e40af;--font: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", system-ui, -apple-system, "Segoe UI", sans-serif;--shadow-sm: 0 1px 2px rgba(15, 23, 42, .05);--shadow-md: 0 4px 24px rgba(15, 23, 42, .06);--radius: 10px;--header-h: 64px;--max: 1080px}*,*:before,*:after{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;min-height:100vh;font-family:var(--font);font-size:16px;line-height:1.6;color:var(--color-text);background:var(--color-bg);-webkit-font-smoothing:antialiased}.skip-link{position:absolute;left:-9999px;top:auto;width:1px;height:1px;overflow:hidden}.skip-link:focus{position:fixed;left:16px;top:16px;z-index:1000;width:auto;height:auto;padding:10px 16px;background:var(--color-accent);color:#fff;border-radius:var(--radius);text-decoration:none}.site-header{position:sticky;top:0;z-index:50;height:var(--header-h);background:#ffffffeb;border-bottom:1px solid var(--color-border);-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px)}.site-header__inner{max-width:var(--max);margin:0 auto;padding:0 24px;height:100%;display:flex;align-items:center;justify-content:space-between;gap:24px}.brand{display:inline-flex;align-items:center;gap:10px;text-decoration:none;color:var(--color-text);font-weight:700;font-size:1.125rem;letter-spacing:.02em}.brand__mark{display:block;width:32px;height:32px;border-radius:8px;object-fit:cover;box-shadow:var(--shadow-sm);flex-shrink:0}.brand__mark--sm{width:22px;height:22px;border-radius:6px}.brand__name{line-height:1}.site-nav{display:flex;align-items:center;gap:8px}.site-nav a{padding:8px 14px;font-size:.9375rem;font-weight:500;color:var(--color-text-secondary);text-decoration:none;border-radius:8px;transition:color .15s ease,background .15s ease}.site-nav a:hover{color:var(--color-accent);background:var(--color-surface)}@media(max-width:560px){.site-nav{display:none}}.hero{max-width:var(--max);margin:0 auto;padding:56px 24px 72px;display:grid;grid-template-columns:minmax(0,1fr) minmax(240px,1fr);gap:48px;align-items:center}.hero__content{min-width:0}@media(max-width:880px){.hero{grid-template-columns:1fr;padding-top:40px;padding-bottom:48px}.hero__visual{order:-1;margin:0 auto}}.hero__eyebrow{margin:0 0 12px;font-size:.8125rem;font-weight:600;letter-spacing:.12em;text-transform:uppercase;color:var(--color-accent)}.hero__title{margin:0 0 16px;font-size:clamp(1.75rem,4vw,2.375rem);font-weight:700;line-height:1.25;letter-spacing:-.02em;color:var(--color-text)}.hero__desc{margin:0 0 28px;max-width:36rem;font-size:1.0625rem;color:var(--color-text-secondary);line-height:1.65}.hero__actions{display:flex;flex-wrap:wrap;gap:12px;align-items:center}.hero__hint{margin:16px 0 0;font-size:.8125rem;color:var(--color-muted);max-width:32rem;line-height:1.5}.hero__visual{display:flex;justify-content:center;align-items:center;min-width:0}.hero-phone{width:100%;max-width:280px;filter:drop-shadow(0 12px 28px rgba(15,23,42,.12))}.hero-phone__frame{position:relative;padding:10px;border-radius:36px;background:linear-gradient(160deg,#334155,#0f172a 55%,#1e293b);box-shadow:inset 0 1px #ffffff1f,0 0 0 1px #0f172a59}.hero-phone__speaker{position:absolute;top:18px;left:50%;transform:translate(-50%);width:48px;height:5px;border-radius:99px;background:#0f172a;opacity:.85}.hero-phone__screen{margin-top:8px;border-radius:28px;background:#f1f5f9;overflow:hidden;display:flex;flex-direction:column;aspect-ratio:10 / 19}.hero-phone__status{display:flex;align-items:center;justify-content:space-between;padding:10px 16px 6px;font-size:11px;font-weight:600;letter-spacing:.02em;color:#0f172a;background:#fff}.hero-phone__icons{width:52px;height:11px;border-radius:3px;background:linear-gradient(90deg,#0f172a 0%,#0f172a 18%,transparent 18%,transparent 28%,#0f172a 28%,#0f172a 46%,transparent 46%,transparent 56%,#0f172a 56%,#0f172a 100%);opacity:.35}.hero-phone__appbar{display:flex;align-items:center;gap:10px;padding:10px 16px 12px;background:#fff;border-bottom:1px solid #e2e8f0}.hero-phone__appicon{border-radius:7px;box-shadow:0 1px 3px #0f172a1f}.hero-phone__apptitle{font-size:17px;font-weight:700;color:#0f172a;letter-spacing:.02em}.hero-phone__body{flex:1;padding:12px 12px 8px;display:flex;flex-direction:column;gap:10px;background:linear-gradient(180deg,#f8fafc,#eef2f7)}.hero-phone__chip-row{display:flex;flex-wrap:wrap;gap:6px}.hero-phone__chip{padding:5px 10px;font-size:11px;font-weight:600;color:#64748b;background:#fff;border:1px solid #e2e8f0;border-radius:999px}.hero-phone__chip--on{color:#fff;background:var(--color-accent);border-color:var(--color-accent)}.hero-phone__card{padding:12px 14px;border-radius:12px;background:#fff;border:1px solid #e2e8f0;display:flex;flex-direction:column;gap:4px;box-shadow:0 1px 2px #0f172a0a}.hero-phone__card--accent{border-color:#bfdbfe;background:linear-gradient(135deg,#eff6ff,#fff 60%)}.hero-phone__card-title{font-size:13px;font-weight:700;color:#0f172a}.hero-phone__card-sub{font-size:11px;color:#64748b}.hero-phone__list{display:flex;flex-direction:column;gap:8px}.hero-phone__list-item{display:flex;align-items:center;gap:10px;padding:10px 12px;background:#fff;border-radius:12px;border:1px solid #e8ecf1}.hero-phone__avatar{width:36px;height:36px;border-radius:10px;flex-shrink:0;background:linear-gradient(145deg,#cbd5e1,#94a3b8)}.hero-phone__avatar--alt{background:linear-gradient(145deg,#93c5fd,#3b82f6)}.hero-phone__list-text{flex:1;min-width:0;display:flex;flex-direction:column;gap:6px}.hero-phone__line{display:block;height:8px;border-radius:4px;background:#e2e8f0}.hero-phone__line--strong{width:58%;background:#cbd5e1}.hero-phone__line--muted{width:40%;background:#e8ecf1}.hero-phone__tabbar{display:flex;justify-content:space-around;align-items:center;padding:10px 12px 14px;background:#fff;border-top:1px solid #e2e8f0}.hero-phone__tab{width:22px;height:22px;border-radius:8px;background:#e2e8f0}.hero-phone__tab--active{background:var(--color-accent);box-shadow:0 0 0 3px #1d4ed833}.btn{display:inline-flex;align-items:center;justify-content:center;padding:11px 22px;font-size:.9375rem;font-weight:600;text-decoration:none;border-radius:var(--radius);border:1px solid transparent;cursor:pointer;transition:background .15s ease,border-color .15s ease,color .15s ease,box-shadow .15s ease}.btn--lg{padding:14px 28px;font-size:1rem}.btn--primary{color:#fff;background:var(--color-accent);border-color:var(--color-accent);box-shadow:0 1px 2px #1d4ed833}.btn--primary:hover{background:var(--color-accent-hover);border-color:var(--color-accent-hover)}.btn--secondary{color:var(--color-accent);background:#eff6ff;border-color:#bfdbfe}.btn--secondary:hover{background:#dbeafe}.btn--outline{color:var(--color-text-secondary);background:var(--color-bg);border-color:var(--color-border)}.btn--outline:hover{border-color:#cbd5e1;color:var(--color-text)}.section{max-width:var(--max);margin:0 auto;padding:64px 24px}.section--tight{padding-top:48px;padding-bottom:56px}.section--muted{background:var(--color-surface);max-width:none;padding-left:24px;padding-right:24px}.section__head{max-width:var(--max);margin:0 auto 40px;text-align:center}.section__title{margin:0 0 10px;font-size:1.5rem;font-weight:700;color:var(--color-text);letter-spacing:-.02em}.section__title--sm{font-size:1.125rem;margin-bottom:16px}.section__lead{margin:0;font-size:1rem;color:var(--color-muted)}.feature-grid{max-width:var(--max);margin:0 auto;display:grid;grid-template-columns:repeat(3,1fr);gap:20px}@media(max-width:900px){.feature-grid{grid-template-columns:repeat(2,1fr)}}@media(max-width:520px){.feature-grid{grid-template-columns:1fr}}.feature-card{padding:24px 22px;border-radius:var(--radius);border:1px solid var(--color-border);background:var(--color-bg);box-shadow:var(--shadow-sm);transition:border-color .15s ease,box-shadow .15s ease}.feature-card:hover{border-color:#cbd5e1;box-shadow:var(--shadow-md)}.feature-card__icon{display:inline-flex;align-items:center;justify-content:center;min-width:44px;height:28px;padding:0 10px;margin-bottom:14px;font-size:.75rem;font-weight:700;color:var(--color-accent);background:#eff6ff;border-radius:6px;letter-spacing:.04em}.feature-card__title{margin:0 0 8px;font-size:1.0625rem;font-weight:600;color:var(--color-text)}.feature-card__text{margin:0;font-size:.875rem;color:var(--color-text-secondary);line-height:1.55}.cta-band{background:linear-gradient(180deg,#f1f5f9,#e8eef5);border-top:1px solid var(--color-border);border-bottom:1px solid var(--color-border)}.cta-band__inner{max-width:var(--max);margin:0 auto;padding:48px 24px;display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:24px}.cta-band__title{margin:0 0 8px;font-size:1.375rem;font-weight:700;color:var(--color-text)}.cta-band__desc{margin:0;font-size:.9375rem;color:var(--color-text-secondary);max-width:420px}.about__body{max-width:720px;margin:0 auto}.about__body p{margin:0 0 16px;font-size:1rem;color:var(--color-text-secondary);line-height:1.75}.about__body p:last-child{margin-bottom:0}.section--install{text-align:center}.section--install .section__title--sm{margin-left:auto;margin-right:auto}.install-steps{max-width:640px;margin:0 auto;padding-left:1.25rem;text-align:left;color:var(--color-text-secondary);font-size:.9375rem;line-height:1.75}.install-steps li{margin:10px 0}.text-muted{color:var(--color-muted)}.small{font-size:.8125rem}code{font-family:ui-monospace,SF Mono,Menlo,monospace;font-size:.84em;padding:2px 6px;background:#f1f5f9;border:1px solid var(--color-border);border-radius:4px;color:#334155}.site-footer{border-top:1px solid var(--color-border);background:var(--color-bg);padding:40px 24px 32px}.site-footer__inner{max-width:var(--max);margin:0 auto;text-align:center}.site-footer__brand{display:inline-flex;align-items:center;gap:8px;font-weight:700;font-size:.9375rem;color:var(--color-text);margin-bottom:8px}.site-footer__copy{margin:0 0 20px;font-size:.8125rem;color:var(--color-muted)}.site-footer__dev{margin:0 auto;max-width:560px;line-height:1.6}