/* 人人视频 rrsp-web.cloud */
:root{--primary:#6C4FF8;--primary-soft:#9B8AFB;--ink:#252331;--muted:#716E7E;--deep:#1E1B2E;--bg:#F7F6FB;--panel:#EEEAF8;--accent:#F06A8A;--white:#fff;--line:#DED9ED;--shadow:0 18px 50px rgba(30,27,46,.09);--radius:24px;--max:1180px}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--bg);color:var(--ink);font-family:system-ui,-apple-system,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;line-height:1.75}img{max-width:100%;height:auto;display:block}a{color:inherit;text-decoration:none}button,input{font:inherit}.skip-link{position:fixed;left:16px;top:-60px;z-index:100;background:var(--deep);color:white;padding:10px 14px;border-radius:10px}.skip-link:focus{top:16px}.site-header{position:sticky;top:0;z-index:50;background:rgba(247,246,251,.92);backdrop-filter:blur(16px);border-bottom:1px solid rgba(222,217,237,.8)}.header-inner{max-width:var(--max);margin:auto;min-height:76px;padding:10px 24px;display:flex;align-items:center;gap:28px}.brand{display:flex;align-items:center;gap:11px;margin-right:auto}.brand img{width:44px;height:44px;object-fit:contain}.brand span{display:flex;flex-direction:column;line-height:1.2}.brand strong{font-size:18px;color:var(--deep)}.brand small{font-size:12px;color:var(--muted);margin-top:5px}.site-nav{display:flex;align-items:center;gap:6px}.site-nav a{padding:9px 13px;border-radius:12px;color:var(--muted);font-size:14px}.site-nav a:hover,.site-nav a:focus-visible,.site-nav a.is-active{background:var(--panel);color:var(--deep)}.menu-toggle{display:none;border:1px solid var(--line);background:white;border-radius:12px;padding:8px 11px;color:var(--deep)}main{overflow:hidden}.hero{max-width:var(--max);margin:0 auto;padding:76px 24px 50px;display:grid;grid-template-columns:1.08fr .92fr;gap:56px;align-items:center}.hero-copy{padding:10px 0}.kicker,.eyebrow{text-transform:none;letter-spacing:.08em;color:var(--primary);font-weight:700;font-size:13px;margin:0 0 10px}.hero h1,.page-intro h1{font-size:clamp(40px,5.3vw,70px);line-height:1.08;letter-spacing:-.04em;color:var(--deep);margin:0 0 22px}.lead{font-size:18px;color:#4f4b5d;max-width:760px;margin:0 0 26px}.hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin:26px 0}.button{display:inline-flex;align-items:center;justify-content:center;min-height:46px;padding:11px 18px;border-radius:14px;font-weight:700;border:1px solid transparent;transition:transform .2s ease,box-shadow .2s ease}.button:hover{transform:translateY(-2px)}.button.primary{background:var(--primary);color:white;box-shadow:0 10px 24px rgba(108,79,248,.22)}.button.secondary{background:white;border-color:var(--line);color:var(--deep)}.hero-points{display:flex;flex-wrap:wrap;gap:8px 18px;padding:0;margin:26px 0 0;list-style:none;color:var(--muted);font-size:14px}.hero-points li:before{content:"";width:7px;height:7px;border-radius:50%;display:inline-block;background:var(--accent);margin-right:8px}.hero-media,.page-intro figure{margin:0;border-radius:32px;overflow:hidden;box-shadow:var(--shadow);background:var(--panel)}.hero-media img,.page-intro img{width:100%;aspect-ratio:1.18/1;object-fit:cover}.section{max-width:var(--max);margin:0 auto;padding:66px 24px}.section-heading{max-width:810px;margin-bottom:30px}.section-heading.compact{max-width:680px}.section-heading h2,.split-copy h2,.renren-strip h2,.editorial-note h2,.prose-section h2,.comparison-section h2{font-size:clamp(28px,3.5vw,44px);line-height:1.18;letter-spacing:-.025em;color:var(--deep);margin:0 0 14px}.section-heading p,.split-copy p,.renren-strip p,.editorial-note p,.prose-section p{color:var(--muted);font-size:16px}.article-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}.article-card{background:white;border:1px solid rgba(222,217,237,.85);border-radius:20px;padding:26px;min-height:100%;box-shadow:0 8px 24px rgba(30,27,46,.035)}.article-card h3{font-size:20px;line-height:1.35;color:var(--deep);margin:5px 0 11px}.article-card p{color:var(--muted);margin:0}.article-card ul{padding-left:20px;margin:16px 0 0;color:#565162;font-size:14px}.article-card li+li{margin-top:5px}.inline-cta{margin-top:24px;background:var(--deep);color:white;border-radius:20px;padding:20px 24px;display:flex;gap:18px;align-items:center;justify-content:space-between}.inline-cta a{font-weight:800}.inline-cta span{color:#c9c4d8;font-size:14px}.split-section{display:grid;grid-template-columns:1fr 1fr;gap:46px;align-items:center}.split-section.reverse figure{order:-1}.split-section figure{margin:0;border-radius:24px;overflow:hidden;background:var(--panel)}.split-section figure img{width:100%;aspect-ratio:1.45/1;object-fit:cover}.split-copy{max-width:560px}.text-link{display:inline-flex;margin-top:10px;color:var(--primary);font-weight:800;border-bottom:1px solid rgba(108,79,248,.28)}.devices-band{background:var(--panel);max-width:none;padding-left:max(24px,calc((100% - var(--max))/2 + 24px));padding-right:max(24px,calc((100% - var(--max))/2 + 24px))}.device-columns{display:grid;grid-template-columns:repeat(3,1fr);gap:18px;margin-bottom:24px}.device-columns article{background:rgba(255,255,255,.78);border:1px solid rgba(255,255,255,.85);border-radius:20px;overflow:hidden;padding-bottom:20px}.device-columns img{width:100%;aspect-ratio:1.45/1;object-fit:cover}.device-columns h3,.device-columns p{margin-left:20px;margin-right:20px}.device-columns h3{margin-bottom:6px;color:var(--deep)}.device-columns p{margin-top:0;color:var(--muted);font-size:14px}.renren-strip{display:flex;align-items:end;justify-content:space-between;gap:40px;border-top:1px solid var(--line);border-bottom:1px solid var(--line)}.renren-strip>div{max-width:800px}.faq-list{display:grid;grid-template-columns:1fr 1fr;gap:12px}.faq-list details{background:white;border:1px solid var(--line);border-radius:16px;padding:0 18px}.faq-list summary{cursor:pointer;list-style:none;font-weight:750;color:var(--deep);padding:18px 28px 18px 0;position:relative}.faq-list summary::-webkit-details-marker{display:none}.faq-list summary:after{content:"+";position:absolute;right:0;top:17px;color:var(--primary);font-size:22px}.faq-list details[open] summary:after{content:"−"}.faq-list details div{border-top:1px solid var(--line);padding:0 0 16px;color:var(--muted)}.inner-main{min-height:60vh}.breadcrumb{max-width:var(--max);margin:0 auto;padding:24px 24px 0}.breadcrumb ol{display:flex;gap:8px;list-style:none;padding:0;margin:0;color:var(--muted);font-size:13px}.breadcrumb li+li:before{content:"/";margin-right:8px;color:#aaa4ba}.breadcrumb a:hover{color:var(--primary)}.page-intro{max-width:var(--max);margin:0 auto;padding:54px 24px 52px;display:grid;grid-template-columns:1.06fr .94fr;gap:52px;align-items:center}.page-intro h1{font-size:clamp(38px,4.8vw,62px)}.prose-section{max-width:980px}.info-rows{margin-top:24px;border-top:1px solid var(--line)}.info-row{display:grid;grid-template-columns:150px 1fr;gap:24px;padding:18px 0;border-bottom:1px solid var(--line)}.info-row strong{color:var(--deep)}.info-row span{color:var(--muted)}.comparison-table{border:1px solid var(--line);border-radius:18px;overflow:hidden;background:white}.comparison-table .tr{display:grid;grid-template-columns:.7fr 1.2fr 1.8fr;border-top:1px solid var(--line)}.comparison-table .tr:first-child{border-top:0}.comparison-table .tr>*{padding:16px 18px}.comparison-table .head{background:var(--panel);font-weight:800;color:var(--deep)}.comparison-table .tr span,.comparison-table .tr strong{border-left:1px solid var(--line)}.comparison-table .tr>:first-child{border-left:0}.editorial-note{display:grid;grid-template-columns:1fr 1fr;gap:32px;background:var(--deep);max-width:none;padding-left:max(24px,calc((100% - var(--max))/2 + 24px));padding-right:max(24px,calc((100% - var(--max))/2 + 24px));color:white}.editorial-note h2{color:white}.editorial-note p{color:#c9c4d8}.topic-links{display:grid;gap:10px}.topic-links a{display:flex;justify-content:space-between;gap:20px;border:1px solid rgba(255,255,255,.14);border-radius:16px;padding:16px 18px}.topic-links a:hover{background:rgba(255,255,255,.07)}.topic-links span{color:#bdb6cf;font-size:13px;text-align:right}.next-links{max-width:var(--max);margin:0 auto 70px;padding:0 24px;display:grid;grid-template-columns:1fr 1fr;gap:14px}.next-links a{background:white;border:1px solid var(--line);border-radius:18px;padding:20px;display:flex;flex-direction:column}.next-links span{font-size:13px;color:var(--muted)}.next-links strong{margin-top:4px;color:var(--deep)}.next-links a:hover strong{color:var(--primary)}.error-page{max-width:760px;margin:0 auto;padding:110px 24px;text-align:center}.error-page h1{font-size:48px;line-height:1.1;color:var(--deep);margin:8px 0 18px}.error-page>p{color:var(--muted)}.error-links{display:flex;justify-content:center;flex-wrap:wrap;gap:10px;margin-top:28px}.site-footer{border-top:1px solid var(--line);background:#f0edf7;padding:42px 24px 24px}.footer-inner{max-width:var(--max);margin:auto;display:flex;justify-content:space-between;gap:32px}.footer-inner>div{max-width:600px}.footer-inner strong{font-size:20px;color:var(--deep)}.footer-inner p{color:var(--muted);margin:6px 0}.footer-inner nav{display:flex;gap:12px 20px;flex-wrap:wrap;align-content:flex-start;justify-content:flex-end;color:var(--muted);font-size:14px}.footer-inner a:hover{color:var(--primary)}.copyright{max-width:var(--max);margin:28px auto 0;border-top:1px solid var(--line);padding-top:18px;color:#858092;font-size:12px}
@media (max-width:900px){.menu-toggle{display:block}.site-nav{position:absolute;left:16px;right:16px;top:70px;background:white;border:1px solid var(--line);border-radius:18px;box-shadow:var(--shadow);padding:12px;display:none;flex-direction:column;align-items:stretch}.site-nav.is-open{display:flex}.site-nav a{padding:12px}.hero,.page-intro,.split-section,.editorial-note{grid-template-columns:1fr}.hero{padding-top:50px}.hero-media,.page-intro figure{max-width:720px}.article-grid{grid-template-columns:1fr 1fr}.device-columns{grid-template-columns:1fr}.split-section.reverse figure{order:0}.renren-strip{align-items:flex-start;flex-direction:column}.faq-list{grid-template-columns:1fr}.footer-inner{flex-direction:column}.footer-inner nav{justify-content:flex-start}.topic-links span{text-align:left}.topic-links a{flex-direction:column;gap:3px}}
@media (max-width:640px){.header-inner{padding:8px 16px;min-height:68px}.brand small{display:none}.brand img{width:38px;height:38px}.hero,.section,.page-intro{padding-left:18px;padding-right:18px}.hero{padding-top:36px;gap:30px}.hero h1,.page-intro h1{font-size:38px}.lead{font-size:16px}.hero-actions{flex-direction:column}.button{width:100%}.article-grid{grid-template-columns:1fr}.article-card{padding:22px}.inline-cta{align-items:flex-start;flex-direction:column;gap:6px}.info-row{grid-template-columns:1fr;gap:4px}.comparison-table{overflow-x:auto}.comparison-table .tr{min-width:650px}.next-links{grid-template-columns:1fr}.renren-strip{padding-top:48px;padding-bottom:48px}.error-page h1{font-size:38px}}
@media (prefers-reduced-motion:reduce){*{scroll-behavior:auto!important;transition:none!important;animation:none!important}}
:focus-visible{outline:3px solid rgba(240,106,138,.55);outline-offset:3px}
.deep-list{display:grid;gap:16px}.deep-item{display:grid;grid-template-columns:72px 1fr;gap:24px;background:white;border:1px solid var(--line);border-radius:20px;padding:26px 28px}.deep-index{width:52px;height:52px;border-radius:16px;background:var(--panel);display:grid;place-items:center;color:var(--primary);font-weight:800}.deep-item h3{font-size:22px;line-height:1.35;color:var(--deep);margin:0 0 10px}.deep-item p{color:var(--muted);margin:0}.deep-item p+p{margin-top:10px}.checklist{display:grid;grid-template-columns:repeat(3,1fr);gap:8px 16px;padding:0;margin:18px 0 0;list-style:none}.checklist li{font-size:13px;color:#565162;padding-left:18px;position:relative}.checklist li:before{content:"";position:absolute;left:0;top:.72em;width:7px;height:7px;border-radius:50%;background:var(--accent)}
@media (max-width:760px){.deep-item{grid-template-columns:1fr;padding:22px}.checklist{grid-template-columns:1fr}.deep-index{width:44px;height:44px}}
.reference-grid{display:grid;grid-template-columns:1fr 1fr;gap:14px}.reference-grid article{background:white;border:1px solid var(--line);border-radius:18px;padding:22px}.reference-grid h3{margin:0 0 8px;color:var(--deep);font-size:18px}.reference-grid p{margin:0;color:var(--muted);font-size:14px}@media(max-width:760px){.reference-grid{grid-template-columns:1fr}}
.practical-list{border-top:1px solid var(--line)}.practical-list article{display:grid;grid-template-columns:minmax(220px,.75fr) 1.8fr;gap:32px;padding:22px 0;border-bottom:1px solid var(--line)}.practical-list h3{margin:0;color:var(--deep);font-size:18px}.practical-list p{margin:0;color:var(--muted)}@media(max-width:760px){.practical-list article{grid-template-columns:1fr;gap:8px}}