*{margin:0;padding:0;box-sizing:border-box}
:root{
--red:#900000;--red-hover:#700000;
--bg:#ffffff;--bg-soft:#faf7f7;--bg-gray:#f4f2f2;
--ink:#222222;--body:#555555;--light:#8a8a8a;
--line:#e8e3e3;--radius:8px;
--shadow:0 4px 18px rgba(80,0,0,.07);
}
body{
font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
background:var(--bg);color:var(--body);line-height:1.7;font-size:16px;
-webkit-font-smoothing:antialiased;
}
h1,h2,h3,h4{color:var(--ink);font-weight:600;line-height:1.35}
a{text-decoration:none;color:inherit}
img{max-width:100%;display:block}
.container{max-width:1120px;margin:0 auto;padding:0 22px}
section{padding:72px 0}

/* header */
.site-header{position:sticky;top:0;z-index:50;background:rgba(255,255,255,.96);
border-bottom:1px solid var(--line);backdrop-filter:blur(8px)}
.nav-inner{display:flex;align-items:center;justify-content:space-between;height:68px}
.brand{display:flex;align-items:center;gap:10px;font-size:1.25rem;font-weight:700;color:var(--red)}
.brand img{height:34px;width:auto;border-radius:6px}
.nav-links{display:flex;gap:26px;list-style:none}
.nav-links a{font-size:.94rem;color:var(--ink);font-weight:500}
.nav-links a:hover{color:var(--red)}

/* hero */
.hero{padding:80px 0 64px;background:linear-gradient(180deg,#fff 0%,var(--bg-soft) 100%);border-bottom:1px solid var(--line)}
.hero-grid{display:grid;grid-template-columns:1.05fr .95fr;gap:48px;align-items:center}
.hero h1{font-size:2.6rem;letter-spacing:-.01em;margin-bottom:18px}
.hero h1 em{font-style:normal;color:var(--red)}
.hero-lead{font-size:1.12rem;margin-bottom:14px;color:var(--ink)}
.hero-sub{font-size:1rem;margin-bottom:30px;padding-left:16px;border-left:3px solid var(--red)}
.hero-btns{display:flex;gap:14px;flex-wrap:wrap}
.btn{display:inline-flex;align-items:center;justify-content:center;padding:13px 30px;
font-size:.98rem;font-weight:500;border-radius:6px;border:1px solid transparent;transition:.2s}
.btn-primary{background:var(--red);color:#fff}
.btn-primary:hover{background:var(--red-hover);transform:translateY(-2px)}
.btn-outline{border-color:var(--line);color:var(--ink)}
.btn-outline:hover{border-color:var(--red);color:var(--red)}
.hero-shot{border-radius:10px;overflow:hidden;box-shadow:var(--shadow);border:1px solid var(--line);background:#fff}

/* generic */
.sec-title{font-size:1.85rem;margin-bottom:14px}
.sec-desc{max-width:740px;margin-bottom:40px;font-size:1.02rem}

/* language panel */
.lang-section{background:var(--bg-soft);border-bottom:1px solid var(--line)}
.lang-grid{display:grid;grid-template-columns:1fr 1fr;gap:26px}
.lang-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);
padding:30px;box-shadow:var(--shadow)}
.lang-card h3{font-size:1.2rem;margin-bottom:12px}
.lang-card p{font-size:.96rem;margin-bottom:14px}
.lang-steps{list-style:none;counter-reset:st}
.lang-steps li{counter-increment:st;position:relative;padding-left:38px;margin-bottom:12px;font-size:.95rem}
.lang-steps li::before{content:counter(st);position:absolute;left:0;top:1px;width:24px;height:24px;
background:var(--red);color:#fff;border-radius:50%;font-size:.8rem;display:flex;
align-items:center;justify-content:center;font-weight:700}
.lang-note{margin-top:8px;font-size:.9rem;color:var(--red);background:#fff5f5;
border-left:3px solid var(--red);padding:14px 16px;border-radius:4px}

/* screenshot wall */
.wall-section{border-bottom:1px solid var(--line)}
.wall{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.wall figure{border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;background:#fff;box-shadow:var(--shadow)}
.wall img{width:100%;height:230px;object-fit:cover;object-position:top;background:var(--bg-gray)}
.wall figcaption{padding:14px 16px;font-size:.9rem;color:var(--body);border-top:1px solid var(--line)}
.wall .tall img{height:330px}
.wall-span2{grid-column:span 2}

/* filter */
.filter-section{background:var(--bg-gray);border-bottom:1px solid var(--line)}
.filter-grid{display:grid;grid-template-columns:1fr 1fr;gap:32px;align-items:center}
.filter-shot{border-radius:10px;overflow:hidden;border:1px solid var(--line);box-shadow:var(--shadow);background:#fff}
.filter-shot img{width:100%;height:auto}
.filter-list{list-style:none}
.filter-list li{padding:14px 0;border-bottom:1px dashed var(--line);font-size:.97rem}
.filter-list li strong{color:var(--ink)}

/* faq */
.faq-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:24px}
.faq-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:26px}
.faq-card h3{font-size:1.08rem;margin-bottom:10px;display:flex;gap:10px;align-items:flex-start}
.faq-card h3 span{flex:0 0 auto;width:24px;height:24px;border-radius:50%;background:var(--red);
color:#fff;font-size:.78rem;display:flex;align-items:center;justify-content:center;font-weight:700;margin-top:2px}
.faq-card p{font-size:.94rem}

/* steps to get */
.get-section{background:var(--bg-soft);border-top:1px solid var(--line)}
.get-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px;margin-bottom:36px}
.get-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:28px}
.get-card .num{font-size:1.6rem;font-weight:700;color:var(--red);margin-bottom:10px}
.get-card h3{font-size:1.1rem;margin-bottom:8px}
.get-card p{font-size:.94rem}
.download-row{text-align:center}

/* notice */
.notice{display:grid;grid-template-columns:1.15fr .85fr;gap:26px;align-items:center}
.notice-img{border-radius:10px;overflow:hidden;border:1px solid var(--line);background:#fff}
.notice h2{margin-bottom:12px}
.notice p{font-size:.96rem;margin-bottom:10px}

/* footer */
.site-footer{background:#fff;border-top:1px solid var(--line);padding:44px 0 30px;font-size:.84rem;color:var(--light)}
.footer-row{display:flex;justify-content:space-between;flex-wrap:wrap;gap:10px;margin-bottom:10px}
.footer-row a{color:var(--light)}
.footer-row a:hover{color:var(--red)}
.update-line{font-size:.8rem;color:var(--light);margin-bottom:14px}

@media (max-width:1024px){
.hero h1{font-size:2.2rem}
.wall{grid-template-columns:repeat(2,1fr)}
.wall-span2{grid-column:span 2}
}
@media (max-width:768px){
section{padding:54px 0}
.nav-links{display:none}
.hero-grid{grid-template-columns:1fr;gap:32px}
.hero h1{font-size:1.9rem}
.lang-grid,.filter-grid,.faq-grid,.get-grid,.notice{grid-template-columns:1fr}
.wall{grid-template-columns:1fr}
.wall-span2{grid-column:span 1}
.wall img,.wall .tall img{height:260px}
}