:root{--bg:#101b2d;--panel:#182a42;--blue:#66c0f4;--ice:#d8f3ff;--muted:#91adbd;--line:rgba(154,204,232,.2);--accent:#d9ff72;--wrap:1180px}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:#eef5f7;color:#132436;font:1rem/1.6 "Microsoft YaHei","PingFang SC",Arial,sans-serif;overflow-x:hidden}img{display:block;max-width:100%}a{text-decoration:none;color:inherit}.wrap{width:min(calc(100% - 2rem),var(--wrap));margin:auto}.skip{position:fixed;left:1rem;top:-4rem;background:var(--accent);padding:.8rem 1rem;z-index:100}.skip:focus{top:1rem}.topbar{height:4.5rem;position:fixed;inset:0 0 auto;background:rgba(16,27,45,.96);color:var(--ice);z-index:40;border-bottom:1px solid var(--line);backdrop-filter:blur(16px)}.nav-wrap{height:100%;display:flex;align-items:center;justify-content:space-between;gap:1rem}.brand{display:flex;align-items:center;gap:.65rem}.brand img{width:2.1rem;height:2.1rem}.brand b{display:block;color:#fff;font:900 .9rem/1 Arial;letter-spacing:.2em}.brand small{display:block;color:#91adbd;font:700 .46rem/1.3 Arial;letter-spacing:.13em;margin-top:.3rem}.topbar nav{display:none;gap:2rem}.topbar nav a{color:#c6dce8;font:700 .72rem Arial;letter-spacing:.1em}.nav-cta{background:var(--blue);color:#0c1b2c;padding:.75rem 1rem;border-radius:4px;font:900 .72rem Arial}.nav-cta b{font-size:1rem;margin-left:.35rem}.menu{display:flex;flex-direction:column;align-items:center;justify-content:center;gap:4px;width:44px;height:44px;border:1px solid #5b7d92;background:transparent}.menu i{width:19px;height:2px;background:#d8f3ff}.mobile-nav{position:absolute;top:4.5rem;left:0;right:0;display:flex;flex-direction:column;background:var(--bg);max-height:0;overflow:hidden;transition:max-height .25s}.mobile-nav.is-open{max-height:18rem}.mobile-nav a{padding:1rem;border-bottom:1px solid var(--line)}.mobile-nav a:last-child{background:var(--blue);color:#0c1b2c;font-weight:900}.hero{margin-top:4.5rem;min-height:46rem;background:var(--bg);color:var(--ice);position:relative;overflow:hidden}.hero:before{content:"";position:absolute;inset:0;background:linear-gradient(90deg,rgba(16,27,45,.98),rgba(16,27,45,.72) 46%,rgba(16,27,45,.2)),url('/assets/steam-hero.svg') center/cover}.hero-noise{position:absolute;inset:0;background-image:linear-gradient(rgba(102,192,244,.12) 1px,transparent 1px),linear-gradient(90deg,rgba(102,192,244,.12) 1px,transparent 1px);background-size:44px 44px;opacity:.2}.hero-layout{position:relative;display:grid;gap:2rem;padding:5rem 0 2.5rem}.hero-copy{max-width:40rem;z-index:1}.eyebrow{color:var(--blue);font:800 .62rem Arial;letter-spacing:.2em;text-transform:uppercase}.eyebrow span{display:inline-block;width:1.8rem;height:2px;background:var(--blue);vertical-align:middle;margin-right:.5rem}.eyebrow.dark{color:#276a8d}.eyebrow.dark span{background:#276a8d}h1,h2,h3,p{margin-top:0}h1{margin:1.3rem 0 1.4rem;line-height:1}.hero-name{display:block;color:#fff;font:900 clamp(2.4rem,7vw,5.3rem)/1 Arial}.hero-tagline{display:block;color:#e7f5fb;font:900 clamp(1.7rem,4.5vw,3.4rem)/1.1 Arial,"Microsoft YaHei";margin-top:.8rem}.hero-tagline em{color:var(--blue);font-style:normal}.hero-lead{color:#c1d4de;line-height:1.9;max-width:37rem}.hero-actions{display:flex;align-items:center;flex-wrap:wrap;gap:1.2rem;margin-top:2rem}.download-button{display:inline-flex;align-items:center;gap:.7rem;min-height:52px;padding:.65rem 1.2rem;background:var(--blue);color:#0b1a2b;border-radius:4px;font:900 .8rem Arial;box-shadow:6px 6px 0 rgba(217,255,114,.72)}.download-button.dark{background:#0c1b2c;color:#fff}.steam-glyph{display:grid;place-items:center;width:2.2rem;height:2.2rem;border-radius:50%;background:#0c1b2c;color:var(--blue);font-weight:900;font-size:1.1rem}.download-button.dark .steam-glyph{background:var(--blue);color:#0c1b2c}.outline-button{color:var(--blue);font:800 .78rem Arial}.outline-button span{font-size:1.1rem;margin-left:.35rem}.hero-stats{display:flex;flex-wrap:wrap;gap:1.3rem;margin-top:2.4rem;color:#8eaabd;font:700 .58rem Arial;letter-spacing:.1em}.hero-stats b{display:block;color:var(--accent);font-size:.9rem;margin-bottom:.1rem}.hero-art{position:relative;max-width:43rem;align-self:end;z-index:1;transform:rotate(-2deg)}.hero-art img{border:1px solid rgba(166,219,244,.45);box-shadow:16px 16px 0 rgba(102,192,244,.18);background:#102138}.art-chip{position:absolute;padding:.45rem .65rem;background:var(--accent);color:#102034;font:900 .6rem Arial;letter-spacing:.08em}.chip-one{left:-.6rem;bottom:12%}.chip-two{right:-.6rem;top:10%;background:var(--blue)}.hero-bottom{position:relative;display:flex;align-items:center;gap:1rem;padding-bottom:1.5rem;color:#86a3b5;font:700 .56rem Arial;letter-spacing:.16em}.hero-bottom i{width:4rem;height:1px;background:var(--blue)}.hero-bottom b{margin-left:auto;color:var(--accent)}.section{padding:5.5rem 0}.library{background:#d9f5ff}.library-layout{display:grid;gap:2rem;align-items:center}.section-no{color:#153048;font:900 3rem Arial;margin-bottom:.5rem}.library h2,.features h2,.mobile h2,.faq h2{color:#122a40}.library h2 em,.features h2 em,.mobile h2 em,.faq h2 em{color:#246d96;font-style:normal}.library-copy>p:not(.eyebrow):not(.section-no){color:#426579;line-height:1.9;max-width:32rem}.text-link{color:#246d96;font:900 .75rem Arial}.library-board{background:#14283f;color:#dff4ff;padding:1rem;border:1px solid #5a9dbd;box-shadow:12px 12px 0 rgba(26,96,130,.2)}.board-top{display:flex;justify-content:space-between;padding:.5rem .2rem .9rem;border-bottom:1px solid var(--line);color:#88bdd4;font:700 .58rem Arial;letter-spacing:.12em}.game-row{display:grid;grid-template-columns:3.8rem 1fr auto;align-items:center;gap:.8rem;padding:.85rem .2rem;border-bottom:1px solid var(--line)}.game-row:last-child{border-bottom:0}.game-cover{display:grid;place-items:center;aspect-ratio:1.2/1;background:#314f8a;color:#fff;font:900 .65rem/1.1 Arial;text-align:center}.cover-portal{background:linear-gradient(135deg,#3a4d9a,#1d2f59)}.cover-racing{background:linear-gradient(135deg,#226d77,#1b394f)}.cover-rpg{background:linear-gradient(135deg,#754679,#352646)}.game-row small{display:block;color:#78a7bd;font:700 .5rem Arial;letter-spacing:.12em}.game-row strong{display:block;font-size:.95rem}.game-row p{margin:.1rem 0 0;color:#9bb8c8;font-size:.68rem}.play-state,.download-state{padding:.35rem .45rem;border:1px solid var(--blue);color:var(--blue);font:900 .55rem Arial}.download-state{border-color:#7d9aac;color:#a4c0ce}.section-head{display:grid;gap:1rem;align-items:end}.section-head>p{line-height:1.85;color:#557080;max-width:33rem}.features{background:#eef5f7}.feature-grid{display:grid;gap:1px;margin-top:2.4rem;background:#c6d6df}.feature-grid article{position:relative;min-height:17rem;padding:1.4rem;background:#f9fcfd}.feature-no{position:absolute;right:1.2rem;top:1.2rem;color:#9bb2bf;font:800 .65rem Arial}.feature-icon{display:grid;place-items:center;width:3.2rem;height:3.2rem;margin-bottom:1.2rem;border-radius:50%;background:var(--blue);color:#10304a;font:900 1.35rem Arial}.feature-grid h3{font:900 1.2rem Arial;margin:.6rem 0}.feature-grid p{color:#607886;font-size:.82rem;line-height:1.75}.feature-grid a{color:#246d96;font:900 .7rem Arial}.mobile{background:#fff}.mobile-layout{display:grid;gap:2.5rem;align-items:center}.phone-stage{display:flex;align-items:flex-end;justify-content:center;gap:1rem;min-height:29rem;padding:2rem;background:linear-gradient(145deg,#d7f4ff,#eaf6f8)}.phone{width:10.8rem;border:8px solid #14283f;border-radius:1.5rem;background:#14283f;box-shadow:0 14px 24px rgba(22,52,74,.2)}.phone-a{transform:rotate(-5deg)}.phone-b{transform:rotate(5deg);margin-bottom:1.5rem}.phone-screen{min-height:22rem;padding:1rem .75rem;background:linear-gradient(160deg,#244e72,#13253f);color:#e8f7ff}.phone-screen>span{color:var(--blue);font:800 .5rem Arial;letter-spacing:.12em}.phone-screen>strong{display:block;color:#fff;font:900 1.35rem Arial;margin:.8rem 0 1.5rem}.friend,.mobile-card{padding:.7rem 0;border-top:1px solid var(--line)}.friend i{display:inline-block;width:1.3rem;height:1.3rem;border-radius:50%;background:var(--blue);vertical-align:middle;margin-right:.4rem}.friend b,.mobile-card b{font-size:.78rem}.friend small,.mobile-card small{display:block;margin-left:1.7rem;color:#9dc0d1;font-size:.58rem}.mobile-card em{display:block;color:var(--accent);font:900 .62rem Arial;margin-top:.35rem;font-style:normal}.mobile-copy>p:not(.eyebrow){color:#557080;line-height:1.9;max-width:32rem}.mobile-copy ul{list-style:none;margin:2rem 0 0;padding:0;border-top:1px solid #d1dfe5}.mobile-copy li{display:flex;gap:1rem;padding:1rem 0;border-bottom:1px solid #d1dfe5;color:#557080;font-size:.8rem}.mobile-copy li>b{color:#246d96;font:900 .7rem Arial}.mobile-copy li strong{display:block;color:#17334d}.guide{background:var(--bg);color:#e8f5fb}.guide-layout{display:grid;gap:2rem;align-items:center}.guide-card{padding:1.3rem;background:#0d1b2b;border:1px solid #5ba6c9;box-shadow:12px 12px 0 rgba(102,192,244,.2)}.setup-head{display:flex;justify-content:space-between;margin:1.2rem 0;color:#fff;font:900 .95rem Arial;letter-spacing:.12em}.setup-head span{color:var(--accent);font-size:.68rem}.setup-progress{height:6px;background:#20394e}.setup-progress i{display:block;width:42%;height:100%;background:linear-gradient(90deg,var(--blue),var(--accent))}.guide-card ol{list-style:none;margin:1.3rem 0 0;padding:0}.guide-card li{display:grid;grid-template-columns:2rem 1fr auto;gap:.7rem;align-items:center;padding:.85rem 0;border-top:1px solid var(--line);font-size:.78rem}.guide-card li>b{color:var(--blue);font:900 .7rem Arial}.guide-card li em{color:#82a5b9;font:700 .55rem Arial;font-style:normal}.guide-copy h2{color:#fff}.guide-copy h2 em{color:var(--blue);font-style:normal}.guide-copy p{color:#b3cad6;line-height:1.9;max-width:32rem}.download{background:var(--blue)}.download-layout{display:grid;gap:2rem;align-items:center}.download h2{color:#0e2d45}.download h2 em{color:#d9ff72;font-style:normal}.download-layout>div:first-child>p:not(.eyebrow){color:#174761;line-height:1.9;max-width:34rem}.download-art{background:#11243a;padding:1rem;box-shadow:12px 12px 0 #256786}.download-art img{width:100%;border:1px solid rgba(164,221,245,.5)}.download-art>span{display:block;color:#d9ff72;font:700 .58rem Arial;letter-spacing:.14em;margin-top:.8rem}.download-note{display:block;color:#19526f;font:700 .58rem Arial;letter-spacing:.09em;margin-top:1.4rem}.keyword-band{background:#172a40;color:#e8f5fb;padding:5.5rem 0}.keyword-band h2{color:#fff}.keyword-band h2 em{color:#d9ff72;font-style:normal}.keyword-grid{display:grid;gap:0;margin-top:2.4rem;border-top:1px solid var(--line)}.keyword-grid article{padding:1.1rem 0;border-bottom:1px solid var(--line)}.keyword-grid article>b{color:var(--blue);font:900 .7rem Arial}.keyword-grid h3{color:#fff;font:900 .9rem/1.35 Arial,"Microsoft YaHei";margin:.5rem 0}.keyword-grid p{color:#a8c4d2;font-size:.74rem;line-height:1.7;margin:0}.faq{background:#eef5f7}.faq-layout{display:grid;gap:2.5rem}.faq-list details{border-top:1px solid #c7d8e0;padding:1.2rem 0}.faq-list details:last-child{border-bottom:1px solid #c7d8e0}summary{cursor:pointer;display:flex;justify-content:space-between;gap:1rem;font-weight:900;font-size:.88rem;list-style:none}summary::-webkit-details-marker{display:none}summary span{color:#246d96;font-size:1.3rem}.faq-list details p{margin:.8rem 2rem 0 0;color:#607886;font-size:.8rem;line-height:1.8}footer{background:#0c1727;color:#fff;padding:2.5rem 0 5rem}.footer-main{display:flex;flex-direction:column;gap:1.2rem}.footer-main p{color:#8faebe;font-size:.76rem}.back-top{display:flex;align-items:center;justify-content:center;width:44px;height:44px;border:1px solid #5a7689;color:var(--accent);font-size:1.3rem}.footer-bottom{display:flex;flex-direction:column;gap:.35rem;border-top:1px solid var(--line);padding-top:1.1rem;margin-top:1.8rem;color:#708b9b;font-size:.58rem;line-height:1.6}.mobile-download{display:flex;position:fixed;bottom:0;left:0;right:0;z-index:35;background:#fff;color:#0d2032;padding:.65rem 1rem;align-items:center;justify-content:space-between}.mobile-download span{font-weight:900;font-size:.76rem}.mobile-download a{background:#10253b;color:var(--accent);padding:.7rem .85rem;font-weight:900;font-size:.72rem;border-radius:4px}@media(min-width:768px){.wrap{width:min(calc(100% - 4rem),var(--wrap))}.topbar nav{display:flex}.menu,.mobile-nav{display:none}.hero{min-height:50rem}.hero-layout{grid-template-columns:.9fr 1.1fr;gap:3rem;padding-top:6rem}.library-layout{grid-template-columns:.9fr 1.1fr}.section{padding:7.5rem 0}.section-head{grid-template-columns:1fr .75fr}.feature-grid{grid-template-columns:repeat(4,1fr)}.mobile-layout{grid-template-columns:1fr 1fr}.guide-layout{grid-template-columns:1fr 1fr}.download-layout{grid-template-columns:1.05fr .95fr}.keyword-grid{grid-template-columns:repeat(5,1fr)}.keyword-grid article{padding:1.1rem;border-bottom:0;border-right:1px solid var(--line)}.keyword-grid article:last-child{border-right:0}.faq-layout{grid-template-columns:.8fr 1.2fr}.footer-main{flex-direction:row;align-items:center;justify-content:space-between}.footer-bottom{flex-direction:row;justify-content:space-between}footer{padding-bottom:2rem}.mobile-download{display:none}}@media(min-width:1024px){.hero-name{font-size:5.3rem}.hero-tagline{font-size:3.4rem}}
:root{--bg:#101b2d;--panel:#182a42;--blue:#66c0f4;--ice:#d8f3ff;--muted:#91adbd;--line:rgba(154,204,232,.2);--accent:#d9ff72;--wrap:1180px}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:#eef5f7;color:#132436;font:1rem/1.6 "Microsoft YaHei","PingFang SC",Arial,sans-serif;overflow-x:hidden}img{display:block;max-width:100%}a{text-decoration:none;color:inherit}.wrap{width:min(calc(100% - 2rem),var(--wrap));margin:auto}.skip{position:fixed;left:1rem;top:-4rem;background:var(--accent);padding:.8rem 1rem;z-index:100}.skip:focus{top:1rem}.topbar{height:4.5rem;position:fixed;inset:0 0 auto;background:rgba(16,27,45,.96);color:var(--ice);z-index:40;border-bottom:1px solid var(--line);backdrop-filter:blur(16px)}.nav-wrap{height:100%;display:flex;align-items:center;justify-content:space-between;gap:1rem}.brand{display:flex;align-items:center;gap:.65rem}.brand img{width:2.1rem;height:2.1rem}.brand b{display:block;color:#fff;font:900 .9rem/1 Arial;letter-spacing:.2em}.brand small{display:block;color:#91adbd;font:700 .46rem/1.3 Arial;letter-spacing:.13em;margin-top:.3rem}.topbar nav{display:none;gap:2rem}.topbar nav a{color:#c6dce8;font:700 .72rem Arial;letter-spacing:.1em}.nav-cta{background:var(--blue);color:#0c1b2c;padding:.75rem 1rem;border-radius:4px;font:900 .72rem Arial}.nav-cta b{font-size:1rem;margin-left:.35rem}.menu{display:flex;flex-direction:column;align-items:center;justify-content:center;gap:4px;width:44px;height:44px;border:1px solid #5b7d92;background:transparent}.menu i{width:19px;height:2px;background:#d8f3ff}.mobile-nav{position:absolute;top:4.5rem;left:0;right:0;display:flex;flex-direction:column;background:var(--bg);max-height:0;overflow:hidden;transition:max-height .25s}.mobile-nav.is-open{max-height:18rem}.mobile-nav a{padding:1rem;border-bottom:1px solid var(--line)}.mobile-nav a:last-child{background:var(--blue);color:#0c1b2c;font-weight:900}.hero{margin-top:4.5rem;min-height:46rem;background:var(--bg);color:var(--ice);position:relative;overflow:hidden}.hero:before{content:"";position:absolute;inset:0;background:linear-gradient(90deg,rgba(16,27,45,.98),rgba(16,27,45,.72) 46%,rgba(16,27,45,.2)),url('/assets/steam-hero.svg') center/cover}.hero-noise{position:absolute;inset:0;background-image:linear-gradient(rgba(102,192,244,.12) 1px,transparent 1px),linear-gradient(90deg,rgba(102,192,244,.12) 1px,transparent 1px);background-size:44px 44px;opacity:.2}.hero-layout{position:relative;display:grid;gap:2rem;padding:5rem 0 2.5rem}.hero-copy{max-width:40rem;z-index:1}.eyebrow{color:var(--blue);font:800 .62rem Arial;letter-spacing:.2em;text-transform:uppercase}.eyebrow span{display:inline-block;width:1.8rem;height:2px;background:var(--blue);vertical-align:middle;margin-right:.5rem}.eyebrow.dark{color:#276a8d}.eyebrow.dark span{background:#276a8d}h1,h2,h3,p{margin-top:0}h1{margin:1.3rem 0 1.4rem;line-height:1}.hero-name{display:block;color:#fff;font:900 clamp(2.4rem,7vw,5.3rem)/1 Arial}.hero-tagline{display:block;color:#e7f5fb;font:900 clamp(1.7rem,4.5vw,3.4rem)/1.1 Arial,"Microsoft YaHei";margin-top:.8rem}.hero-tagline em{color:var(--blue);font-style:normal}.hero-lead{color:#c1d4de;line-height:1.9;max-width:37rem}.hero-actions{display:flex;align-items:center;flex-wrap:wrap;gap:1.2rem;margin-top:2rem}.download-button{display:inline-flex;align-items:center;gap:.7rem;min-height:52px;padding:.65rem 1.2rem;background:var(--blue);color:#0b1a2b;border-radius:4px;font:900 .8rem Arial;box-shadow:6px 6px 0 rgba(217,255,114,.72)}.download-button.dark{background:#0c1b2c;color:#fff}.steam-glyph{display:grid;place-items:center;width:2.2rem;height:2.2rem;border-radius:50%;background:#0c1b2c;color:var(--blue);font-weight:900;font-size:1.1rem}.download-button.dark .steam-glyph{background:var(--blue);color:#0c1b2c}.outline-button{color:var(--blue);font:800 .78rem Arial}.outline-button span{font-size:1.1rem;margin-left:.35rem}.hero-stats{display:flex;flex-wrap:wrap;gap:1.3rem;margin-top:2.4rem;color:#8eaabd;font:700 .58rem Arial;letter-spacing:.1em}.hero-stats b{display:block;color:var(--accent);font-size:.9rem;margin-bottom:.1rem}.hero-art{position:relative;max-width:43rem;align-self:end;z-index:1;transform:rotate(-2deg)}.hero-art img{border:1px solid rgba(166,219,244,.45);box-shadow:16px 16px 0 rgba(102,192,244,.18);background:#102138}.art-chip{position:absolute;padding:.45rem .65rem;background:var(--accent);color:#102034;font:900 .6rem Arial;letter-spacing:.08em}.chip-one{left:-.6rem;bottom:12%}.chip-two{right:-.6rem;top:10%;background:var(--blue)}.hero-bottom{position:relative;display:flex;align-items:center;gap:1rem;padding-bottom:1.5rem;color:#86a3b5;font:700 .56rem Arial;letter-spacing:.16em}.hero-bottom i{width:4rem;height:1px;background:var(--blue)}.hero-bottom b{margin-left:auto;color:var(--accent)}.section{padding:5.5rem 0}.library{background:#d9f5ff}.library-layout{display:grid;gap:2rem;align-items:center}.section-no{color:#153048;font:900 3rem Arial;margin-bottom:.5rem}.library h2,.features h2,.mobile h2,.faq h2{color:#122a40}.library h2 em,.features h2 em,.mobile h2 em,.faq h2 em{color:#246d96;font-style:normal}.library-copy>p:not(.eyebrow):not(.section-no){color:#426579;line-height:1.9;max-width:32rem}.text-link{color:#246d96;font:900 .75rem Arial}.library-board{background:#14283f;color:#dff4ff;padding:1rem;border:1px solid #5a9dbd;box-shadow:12px 12px 0 rgba(26,96,130,.2)}.board-top{display:flex;justify-content:space-between;padding:.5rem .2rem .9rem;border-bottom:1px solid var(--line);color:#88bdd4;font:700 .58rem Arial;letter-spacing:.12em}.game-row{display:grid;grid-template-columns:3.8rem 1fr auto;align-items:center;gap:.8rem;padding:.85rem .2rem;border-bottom:1px solid var(--line)}.game-row:last-child{border-bottom:0}.game-cover{display:grid;place-items:center;aspect-ratio:1.2/1;background:#314f8a;color:#fff;font:900 .65rem/1.1 Arial;text-align:center}.cover-portal{background:linear-gradient(135deg,#3a4d9a,#1d2f59)}.cover-racing{background:linear-gradient(135deg,#226d77,#1b394f)}.cover-rpg{background:linear-gradient(135deg,#754679,#352646)}.game-row small{display:block;color:#78a7bd;font:700 .5rem Arial;letter-spacing:.12em}.game-row strong{display:block;font-size:.95rem}.game-row p{margin:.1rem 0 0;color:#9bb8c8;font-size:.68rem}.play-state,.download-state{padding:.35rem .45rem;border:1px solid var(--blue);color:var(--blue);font:900 .55rem Arial}.download-state{border-color:#7d9aac;color:#a4c0ce}.section-head{display:grid;gap:1rem;align-items:end}.section-head>p{line-height:1.85;color:#557080;max-width:33rem}.features{background:#eef5f7}.feature-grid{display:grid;gap:1px;margin-top:2.4rem;background:#c6d6df}.feature-grid article{position:relative;min-height:17rem;padding:1.4rem;background:#f9fcfd}.feature-no{position:absolute;right:1.2rem;top:1.2rem;color:#9bb2bf;font:800 .65rem Arial}.feature-icon{display:grid;place-items:center;width:3.2rem;height:3.2rem;margin-bottom:1.2rem;border-radius:50%;background:var(--blue);color:#10304a;font:900 1.35rem Arial}.feature-grid h3{font:900 1.2rem Arial;margin:.6rem 0}.feature-grid p{color:#607886;font-size:.82rem;line-height:1.75}.feature-grid a{color:#246d96;font:900 .7rem Arial}.mobile{background:#fff}.mobile-layout{display:grid;gap:2.5rem;align-items:center}.phone-stage{display:flex;align-items:flex-end;justify-content:center;gap:1rem;min-height:29rem;padding:2rem;background:linear-gradient(145deg,#d7f4ff,#eaf6f8)}.phone{width:10.8rem;border:8px solid #14283f;border-radius:1.5rem;background:#14283f;box-shadow:0 14px 24px rgba(22,52,74,.2)}.phone-a{transform:rotate(-5deg)}.phone-b{transform:rotate(5deg);margin-bottom:1.5rem}.phone-screen{min-height:22rem;padding:1rem .75rem;background:linear-gradient(160deg,#244e72,#13253f);color:#e8f7ff}.phone-screen>span{color:var(--blue);font:800 .5rem Arial;letter-spacing:.12em}.phone-screen>strong{display:block;color:#fff;font:900 1.35rem Arial;margin:.8rem 0 1.5rem}.friend,.mobile-card{padding:.7rem 0;border-top:1px solid var(--line)}.friend i{display:inline-block;width:1.3rem;height:1.3rem;border-radius:50%;background:var(--blue);vertical-align:middle;margin-right:.4rem}.friend b,.mobile-card b{font-size:.78rem}.friend small,.mobile-card small{display:block;margin-left:1.7rem;color:#9dc0d1;font-size:.58rem}.mobile-card em{display:block;color:var(--accent);font:900 .62rem Arial;margin-top:.35rem;font-style:normal}.mobile-copy>p:not(.eyebrow){color:#557080;line-height:1.9;max-width:32rem}.mobile-copy ul{list-style:none;margin:2rem 0 0;padding:0;border-top:1px solid #d1dfe5}.mobile-copy li{display:flex;gap:1rem;padding:1rem 0;border-bottom:1px solid #d1dfe5;color:#557080;font-size:.8rem}.mobile-copy li>b{color:#246d96;font:900 .7rem Arial}.mobile-copy li strong{display:block;color:#17334d}.guide{background:var(--bg);color:#e8f5fb}.guide-layout{display:grid;gap:2rem;align-items:center}.guide-card{padding:1.3rem;background:#0d1b2b;border:1px solid #5ba6c9;box-shadow:12px 12px 0 rgba(102,192,244,.2)}.setup-head{display:flex;justify-content:space-between;margin:1.2rem 0;color:#fff;font:900 .95rem Arial;letter-spacing:.12em}.setup-head span{color:var(--accent);font-size:.68rem}.setup-progress{height:6px;background:#20394e}.setup-progress i{display:block;width:42%;height:100%;background:linear-gradient(90deg,var(--blue),var(--accent))}.guide-card ol{list-style:none;margin:1.3rem 0 0;padding:0}.guide-card li{display:grid;grid-template-columns:2rem 1fr auto;gap:.7rem;align-items:center;padding:.85rem 0;border-top:1px solid var(--line);font-size:.78rem}.guide-card li>b{color:var(--blue);font:900 .7rem Arial}.guide-card li em{color:#82a5b9;font:700 .55rem Arial;font-style:normal}.guide-copy h2{color:#fff}.guide-copy h2 em{color:var(--blue);font-style:normal}.guide-copy p{color:#b3cad6;line-height:1.9;max-width:32rem}.download{background:var(--blue)}.download-layout{display:grid;gap:2rem;align-items:center}.download h2{color:#0e2d45}.download h2 em{color:#d9ff72;font-style:normal}.download-layout>div:first-child>p:not(.eyebrow){color:#174761;line-height:1.9;max-width:34rem}.download-art{background:#11243a;padding:1rem;box-shadow:12px 12px 0 #256786}.download-art img{width:100%;border:1px solid rgba(164,221,245,.5)}.download-art>span{display:block;color:#d9ff72;font:700 .58rem Arial;letter-spacing:.14em;margin-top:.8rem}.download-note{display:block;color:#19526f;font:700 .58rem Arial;letter-spacing:.09em;margin-top:1.4rem}.keyword-band{background:#172a40;color:#e8f5fb;padding:5.5rem 0}.keyword-band h2{color:#fff}.keyword-band h2 em{color:#d9ff72;font-style:normal}.keyword-grid{display:grid;gap:0;margin-top:2.4rem;border-top:1px solid var(--line)}.keyword-grid article{padding:1.1rem 0;border-bottom:1px solid var(--line)}.keyword-grid article>b{color:var(--blue);font:900 .7rem Arial}.keyword-grid h3{color:#fff;font:900 .9rem/1.35 Arial,"Microsoft YaHei";margin:.5rem 0}.keyword-grid p{color:#a8c4d2;font-size:.74rem;line-height:1.7;margin:0}.faq{background:#eef5f7}.faq-layout{display:grid;gap:2.5rem}.faq-list details{border-top:1px solid #c7d8e0;padding:1.2rem 0}.faq-list details:last-child{border-bottom:1px solid #c7d8e0}summary{cursor:pointer;display:flex;justify-content:space-between;gap:1rem;font-weight:900;font-size:.88rem;list-style:none}summary::-webkit-details-marker{display:none}summary span{color:#246d96;font-size:1.3rem}.faq-list details p{margin:.8rem 2rem 0 0;color:#607886;font-size:.8rem;line-height:1.8}footer{background:#0c1727;color:#fff;padding:2.5rem 0 5rem}.footer-main{display:flex;flex-direction:column;gap:1.2rem}.footer-main p{color:#8faebe;font-size:.76rem}.back-top{display:flex;align-items:center;justify-content:center;width:44px;height:44px;border:1px solid #5a7689;color:var(--accent);font-size:1.3rem}.footer-bottom{display:flex;flex-direction:column;gap:.35rem;border-top:1px solid var(--line);padding-top:1.1rem;margin-top:1.8rem;color:#708b9b;font-size:.58rem;line-height:1.6}.mobile-download{display:flex;position:fixed;bottom:0;left:0;right:0;z-index:35;background:#fff;color:#0d2032;padding:.65rem 1rem;align-items:center;justify-content:space-between}.mobile-download span{font-weight:900;font-size:.76rem}.mobile-download a{background:#10253b;color:var(--accent);padding:.7rem .85rem;font-weight:900;font-size:.72rem;border-radius:4px}@media(min-width:768px){.wrap{width:min(calc(100% - 4rem),var(--wrap))}.topbar nav{display:flex}.menu,.mobile-nav{display:none}.hero{min-height:50rem}.hero-layout{grid-template-columns:.9fr 1.1fr;gap:3rem;padding-top:6rem}.library-layout{grid-template-columns:.9fr 1.1fr}.section{padding:7.5rem 0}.section-head{grid-template-columns:1fr .75fr}.feature-grid{grid-template-columns:repeat(4,1fr)}.mobile-layout{grid-template-columns:1fr 1fr}.guide-layout{grid-template-columns:1fr 1fr}.download-layout{grid-template-columns:1.05fr .95fr}.keyword-grid{grid-template-columns:repeat(5,1fr)}.keyword-grid article{padding:1.1rem;border-bottom:0;border-right:1px solid var(--line)}.keyword-grid article:last-child{border-right:0}.faq-layout{grid-template-columns:.8fr 1.2fr}.footer-main{flex-direction:row;align-items:center;justify-content:space-between}.footer-bottom{flex-direction:row;justify-content:space-between}footer{padding-bottom:2rem}.mobile-download{display:none}}@media(min-width:1024px){.hero-name{font-size:5.3rem}.hero-tagline{font-size:3.4rem}}.keyword-details{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:12px;margin-top:18px;padding-top:18px;border-top:1px solid rgba(154,204,232,.2)}.keyword-details p{margin:0;padding:12px 14px;background:rgba(255,255,255,.05);color:#c8d4e4;font-size:.74rem;line-height:1.75}@media(max-width:767px){.keyword-details{grid-template-columns:1fr}}@media(min-width:768px) and (max-width:1023px){.keyword-details{grid-template-columns:repeat(2,minmax(0,1fr))}}