:root{--page:#f5f6f1;--ink:#193e32;--body:#5c685e;--sage:#e4ebe1;--line:#d2d9cd;--serif:"Noto Serif SC","Source Han Serif SC","Songti SC","SimSun",serif;--sans:"Microsoft YaHei","PingFang SC",sans-serif}
*{box-sizing:border-box}html{scroll-behavior:smooth;scroll-padding-top:24px}body{margin:0;background:var(--page);color:var(--ink);font-family:var(--sans);-webkit-font-smoothing:antialiased}a{color:inherit;text-decoration:none}a:focus-visible{outline:3px solid #587957;outline-offset:5px}a:hover{text-decoration:underline;text-underline-offset:5px}.wrap{width:min(1248px,calc(100% - 128px));margin-inline:auto}.header{height:124px;display:flex;align-items:center;justify-content:space-between}.brand{display:flex;align-items:center;gap:15px;font:600 26px var(--serif);letter-spacing:2px}.seal{width:42px;height:42px;display:grid;place-items:center;border:1px solid #8d9e8c;border-radius:50%;font-size:26px;letter-spacing:0}.header nav{display:flex;gap:35px;font-size:14px;color:#465848}.hero{display:grid;grid-template-columns:minmax(0,1fr) 332px;gap:90px;align-items:center;min-height:522px;padding-block:36px 70px}.intro h1{font:400 58px/1.42 var(--serif);letter-spacing:2px;margin:0 0 24px}.summary{font:400 19px/1.95 var(--serif);color:var(--body);margin:0 0 33px}.actions{display:flex;gap:16px;flex-wrap:wrap}.button{display:inline-flex;min-height:50px;align-items:center;justify-content:center;padding:14px 25px;border-radius:5px;font-size:15px;line-height:1.4;border:1px solid var(--ink);transition:background .15s}.button:hover{text-decoration:none}.primary{background:var(--ink);color:#fff}.primary:hover{background:#285441}.secondary{border-color:#a9b6a4}.secondary:hover{background:var(--sage)}.compatibility{font-size:12px;color:#768272;margin:18px 0 0}.download-card{width:332px;padding:28px 30px 21px;background:#fff;border:1px solid #d9dfd4;border-radius:14px;box-shadow:0 8px 20px #24402d07;text-align:center}.download-card h2{font:400 21px var(--serif);margin:0 0 14px}.download-card img{display:block;width:232px;height:232px;margin:auto;max-width:100%;object-fit:contain}.download-card p{margin:13px 0 0;color:#6a7567;font-size:14px;letter-spacing:1px}.features{background:var(--sage)}.feature-grid{display:grid;grid-template-columns:repeat(3,1fr);padding-block:48px 46px}.feature-grid article{padding:0 36px;border-right:1px solid #c7d1c2}.feature-grid article:first-child{padding-left:0}.feature-grid article:last-child{border:0;padding-right:0}.feature-grid h2{font:400 23px/1.5 var(--serif);margin:0 0 13px;white-space:nowrap}.feature-grid p{font:14px/1.8 var(--serif);color:var(--body);margin:0}.install{display:flex;align-items:center;justify-content:space-between;gap:32px;padding-block:55px 53px;border-bottom:1px solid var(--line)}.install h2{margin:0;font:400 24px/1.5 var(--serif)}.install ol{display:flex;gap:28px;align-items:center;list-style:none;margin:0;padding:0;font:16px/1.8 var(--serif);color:#52634f}.install li+li:before{content:"→";margin-right:28px;color:#819079}.footer{display:flex;justify-content:space-between;padding-block:28px 34px;color:#798474;font-size:12px}.footer a{color:#5d6e57}
@media(min-width:1600px){.hero{min-height:560px}}@media(max-width:1100px){.wrap{width:calc(100% - 72px)}.hero{gap:40px;grid-template-columns:minmax(0,1fr) 290px}.intro h1{font-size:46px}.download-card{width:290px;padding:24px}.download-card img{width:220px;height:220px}.feature-grid article{padding-inline:24px}.feature-grid h2{font-size:20px}.install ol{gap:15px}.install li+li:before{margin-right:15px}}@media(max-width:760px){.wrap{width:calc(100% - 40px)}.header{height:90px;gap:14px}.brand{font-size:20px;gap:9px;letter-spacing:1px}.seal{width:34px;height:34px;font-size:22px}.header nav{gap:16px;font-size:12px}.header nav a:first-child{display:none}.hero{display:flex;flex-direction:column;gap:38px;align-items:stretch;padding-block:24px 42px;min-height:0}.intro h1{font-size:clamp(35px,8.8vw,48px);line-height:1.5;letter-spacing:1px;margin-bottom:20px}.summary{font-size:17px;margin-bottom:27px}.actions{gap:10px}.button{font-size:14px;padding-inline:18px;flex:1;white-space:nowrap}.compatibility{font-size:11px}.download-card{align-self:center;width:280px;padding:22px}.download-card img{width:208px;height:208px}.feature-grid{grid-template-columns:1fr;padding-block:8px}.feature-grid article,.feature-grid article:first-child,.feature-grid article:last-child{padding:26px 0;border-right:0;border-bottom:1px solid #c7d1c2}.feature-grid article:last-child{border-bottom:0}.feature-grid h2{font-size:23px;margin-bottom:9px}.feature-grid p{font-size:15px}.install{align-items:flex-start;flex-direction:column;gap:20px;padding-block:34px}.install ol{align-items:flex-start;flex-direction:column;gap:12px;counter-reset:step}.install li{counter-increment:step}.install li:before,.install li+li:before{content:counter(step,decimal-leading-zero);display:inline-block;width:28px;margin-right:12px;color:#73886c;font-family:var(--sans);font-size:13px}.footer{padding-block:23px 28px;gap:15px;font-size:11px}}@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}.button{transition:none}}
/* Desktop values follow the full-size concept; smaller breakpoints retain comfortable touch sizing. */
@media(min-width:1400px){.wrap{width:min(1312px,calc(100% - 176px))}.header{height:88px}.brand{font-size:38px;font-weight:700;gap:18px}.seal{width:52px;height:52px;background:var(--ink);color:#fff;border:0;font-size:38px}.header nav{font:700 27px var(--serif);gap:48px;color:var(--ink)}.hero{grid-template-columns:minmax(0,1fr) 432px;gap:92px;min-height:574px;padding-block:52px 56px}.intro h1{font-size:80px;font-weight:700;line-height:1.22;letter-spacing:1px;margin-bottom:26px}.summary{font-size:34px;line-height:1.46;color:var(--ink);margin-bottom:35px}.actions{gap:24px}.button{font:700 30px/1.25 var(--serif);min-height:70px;padding:14px 42px;border-radius:10px;border-width:2px}.compatibility{font:23px/1.5 var(--serif);color:var(--ink);margin-top:12px}.download-card{width:432px;padding:26px 35px 25px;border-radius:9px;box-shadow:none}.download-card h2{font-size:38px;font-weight:700;margin-bottom:16px}.download-card img{width:300px;height:300px}.download-card p{font:32px var(--serif);color:var(--ink);letter-spacing:0;margin-top:12px}.feature-grid{padding-block:40px 42px}.feature-grid article{padding-inline:44px}.feature-grid h2{font-size:32px;font-weight:700;margin-bottom:8px}.feature-grid p{font-size:23px;line-height:1.8;color:var(--ink)}.install{justify-content:flex-start;gap:44px;padding-block:41px}.install h2{font-size:36px;font-weight:700;white-space:nowrap;padding-right:44px;border-right:1px solid #9cac92}.install ol{font-size:28px;gap:14px;color:var(--ink)}.install li+li:before{margin-right:14px}.footer{font:23px var(--serif);color:var(--ink);padding-block:25px}.footer a{color:var(--ink)}}
@media(min-width:1400px){.feature-grid article{padding-inline:28px}.feature-grid p{font-size:22px}.feature-grid article:first-child{padding-left:0}.feature-grid article:last-child{padding-right:0}}