/* ==========================================================================
   PLive 落地页
   ========================================================================== */

:root{
    --ink:#09051f;
    --pink:#ef3f79;
    --orange:#ff722e;
    --purple:#7028c7;
    --text:#19182d;
    --muted:#6d6b7d;
    --line:#ece7f0;
    --shadow:0 22px 60px rgba(27,13,49,.10);
    --wrap:1180px;
}

*{box-sizing:border-box}
html{scroll-behavior:smooth;overflow-x:hidden}
body{
    margin:0;
    overflow-x:hidden;
    font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,"Helvetica Neue",
                "PingFang SC","Hiragino Sans","Noto Sans JP","Microsoft YaHei",Arial,sans-serif;
    color:var(--text);
    background:#fff;
    -webkit-font-smoothing:antialiased;
}
img{max-width:100%;height:auto;border:0}
a{text-decoration:none;color:inherit}
h1,h2,h3,h4,p{margin:0}
button{font-family:inherit}

.wrap{width:min(var(--wrap),calc(100% - 42px));margin:0 auto}
.section{padding:88px 0}
.section-soft{background:linear-gradient(180deg,#fff 0%,#fcf7fb 100%)}
.text-center{text-align:center}

.section-title{
    margin:0 0 12px;
    color:#171536;
    font-size:42px;
    line-height:1.1;
    font-weight:900;
    letter-spacing:-1.5px;
}
.section-title .accent{
    background:linear-gradient(90deg,var(--pink),var(--orange));
    -webkit-background-clip:text;
    background-clip:text;
    -webkit-text-fill-color:transparent;
}
.section-copy{max-width:720px;color:var(--muted);font-size:16px;line-height:1.75}
.mx-auto{margin-left:auto;margin-right:auto}

/* ---------- 按钮 ---------------------------------------------------------- */

.btn{
    position:relative;
    display:inline-flex;
    align-items:center;
    justify-content:center;
    gap:10px;
    min-height:56px;
    padding:0 20px;
    overflow:hidden;
    isolation:isolate;
    border:1px solid transparent;
    border-radius:14px;
    color:#fff;
    font-size:15px;
    font-weight:900;
    line-height:1.2;
    white-space:nowrap;
    box-shadow:0 10px 24px rgba(8,5,31,.14);
    transition:transform .22s ease,box-shadow .22s ease,border-color .22s ease,background-color .22s ease;
    -webkit-tap-highlight-color:transparent;
    cursor:pointer;
}
.btn:before{
    content:"";
    position:absolute;
    z-index:-1;
    inset:0;
    background:linear-gradient(110deg,transparent 18%,rgba(255,255,255,.20) 48%,transparent 78%);
    transform:translateX(-125%);
    transition:transform .55s ease;
}
.btn.gradient{
    background:linear-gradient(100deg,var(--pink) 0%,var(--orange) 100%);
    border-color:rgba(255,255,255,.16);
    box-shadow:0 14px 30px rgba(239,63,121,.30);
}
.btn.outline{
    background:rgba(255,255,255,.055);
    border-color:rgba(255,93,146,.82);
    backdrop-filter:blur(8px);
    -webkit-backdrop-filter:blur(8px);
}
.btn.small{min-height:46px;padding:0 20px;border-radius:9px;font-size:13px;font-weight:800}

@media (hover:hover) and (pointer:fine){
    .btn:hover{transform:translateY(-3px)}
    .btn:hover:before{transform:translateX(125%)}
    .btn.gradient:hover{box-shadow:0 18px 36px rgba(239,63,121,.40)}
    .btn.outline:hover{background:rgba(239,63,121,.16);border-color:#ff6b9d}
    .btn:hover i:last-child,.btn:hover svg:last-child{transform:translateX(3px)}
}
.btn:active{transform:translateY(0) scale(.98)}
.btn i,.btn svg{transition:transform .22s ease}
a:focus-visible,button:focus-visible{outline:3px solid rgba(255,194,45,.95);outline-offset:3px}

/* 四个平台按钮 */
.platform-grid{
    display:grid;
    grid-template-columns:repeat(4,minmax(0,1fr));
    gap:8px;
    width:100%;
    max-width:590px;
}
.platform-btn{
    min-width:0;
    min-height:54px;
    padding:6px 8px;
    display:flex;
    align-items:center;
    justify-content:flex-start;
    gap:7px;
    color:#17142d;
    text-align:left;
    border:1px solid rgba(255,255,255,.88);
    border-radius:12px;
    background:linear-gradient(180deg,#fff 0%,#f7f4fa 100%);
    box-shadow:0 12px 25px rgba(7,4,28,.20),inset 0 1px 0 #fff;
    transition:transform .22s ease,box-shadow .22s ease,border-color .22s ease;
}
.platform-btn.google{border-color:rgba(103,210,126,.55)}
.platform-btn.apple{border-color:rgba(255,255,255,.92)}
.platform-btn.huawei{border-color:rgba(217,28,28,.22)}
.platform-btn.web{border-color:rgba(129,62,208,.34)}

.platform-icon{
    width:34px;height:34px;
    flex:0 0 34px;
    display:grid;
    place-items:center;
    overflow:hidden;
    border-radius:10px;
    line-height:1;
}
.platform-icon svg{width:22px;height:22px;display:block}
.platform-icon.google{background:#111;color:#fff}
.platform-icon.google svg{width:20px;height:20px}
.platform-icon.apple{color:#fff;background:linear-gradient(145deg,#2a2931,#07070a)}
.platform-icon.apple svg{width:20px;height:20px;fill:currentColor}
.platform-icon.huawei{color:#d91c1c;background:#fff0f3;border:1px solid #ffd7df}
.platform-icon.web{color:#fff;background:linear-gradient(145deg,#7529d0,#ed3d7c);font-size:9px;font-weight:950;letter-spacing:-.2px}

.platform-text{min-width:0;display:flex;flex-direction:column;align-items:flex-start;line-height:1.05}
.platform-text small{margin-bottom:4px;color:#8a8194;font-size:9px;font-weight:800;letter-spacing:.5px;text-transform:uppercase;white-space:nowrap}
.platform-text strong{color:#17142d;font-size:11.5px;font-weight:950;white-space:nowrap}

@media (hover:hover) and (pointer:fine){
    .platform-btn:hover{transform:translateY(-3px);background:#fff;border-color:#fff;box-shadow:0 19px 38px rgba(7,4,28,.30)}
    .platform-btn:hover .platform-icon{transform:scale(1.06)}
}

/* ---------- 顶部 + 首屏 ---------------------------------------------------- */

.hero{
    position:relative;
    overflow:hidden;
    color:#fff;
    background:
        radial-gradient(circle at 88% 30%,rgba(239,63,121,.28),transparent 32%),
        radial-gradient(circle at 15% 80%,rgba(112,40,199,.28),transparent 31%),
        linear-gradient(112deg,#07041c 0%,#120627 46%,#341044 100%);
}
.hero:before{
    content:"";
    position:absolute;inset:0;
    pointer-events:none;
    background-image:
        radial-gradient(circle at 15% 25%,rgba(255,255,255,.12) 0 1px,transparent 1.6px),
        radial-gradient(circle at 75% 20%,rgba(255,255,255,.10) 0 1px,transparent 1.7px);
    background-size:32px 32px,48px 48px;
    opacity:.18;
}
.orbit{position:absolute;border:8px solid transparent;border-radius:50%;pointer-events:none;
       filter:drop-shadow(0 0 13px rgba(255,73,143,.65))}
.orbit.one{width:560px;height:560px;right:-160px;top:120px;border-left-color:#ff3f88;border-bottom-color:#ff7629;transform:rotate(20deg)}
.orbit.two{width:420px;height:420px;left:-280px;bottom:-190px;border-right-color:#8d45dc;border-top-color:#ef3f79}
.dot{position:absolute;border-radius:50%;background:linear-gradient(145deg,#9b3ec2,#ee4590);opacity:.7}
.dot.d1{width:220px;height:220px;right:-70px;top:190px}
.dot.d2{width:130px;height:130px;left:-74px;bottom:74px;background:#5d32a2}

.site-nav{position:relative;z-index:20;padding:22px 0}
.site-nav .wrap{display:flex;align-items:center;gap:24px}
.brand{flex:0 0 auto;display:block}
.brand img{width:132px;max-height:76px;object-fit:contain;display:block}

.nav-links{display:flex;align-items:center;justify-content:center;gap:0;flex:1 1 auto;min-width:0}
.nav-links a{
    position:relative;
    padding:15px 17px;
    color:#fff;
    font-size:14px;
    font-weight:800;
    opacity:.92;
    white-space:nowrap;
}
.nav-links a:after{
    content:"";
    position:absolute;left:17px;right:17px;bottom:5px;height:2px;
    background:linear-gradient(90deg,var(--pink),var(--orange));
    transform:scaleX(0);
    transition:.25s;
}
.nav-links a:hover:after,.nav-links a.active:after{transform:scaleX(1)}

.nav-actions{display:flex;align-items:center;gap:10px;flex:0 0 auto}

.lang{position:relative}
.lang-btn{
    min-width:122px;height:48px;
    padding:0 14px;
    white-space:nowrap;
    display:inline-flex;align-items:center;justify-content:center;gap:8px;
    color:#fff;
    border:1px solid rgba(255,255,255,.24);
    border-radius:13px;
    background:linear-gradient(180deg,rgba(255,255,255,.10),rgba(255,255,255,.035));
    backdrop-filter:blur(10px);
    -webkit-backdrop-filter:blur(10px);
    font-size:12px;font-weight:900;
    box-shadow:0 12px 27px rgba(8,5,31,.20),inset 0 1px 0 rgba(255,255,255,.12);
    cursor:pointer;
    transition:transform .22s ease,border-color .22s ease,box-shadow .22s ease;
}
.lang-btn svg{width:16px;height:16px;stroke:currentColor;fill:none;stroke-width:2;transition:transform .22s ease}
.lang.open .lang-btn svg:last-of-type{transform:rotate(180deg)}
.lang-btn:hover{transform:translateY(-2px);border-color:rgba(255,255,255,.48)}
.lang-menu{
    position:absolute;
    right:0;
    top:calc(100% + 8px);
    z-index:60;
    min-width:172px;
    padding:6px;
    border:1px solid rgba(255,255,255,.18);
    border-radius:14px;
    background:#0b0621;   /* 必须是不透明色，半透明会被首屏大字透过来，手机上看不清 */
    box-shadow:0 22px 44px rgba(0,0,0,.42);
    display:none;
}
.lang.open .lang-menu{display:block}
.lang-menu a{
    display:flex;align-items:center;justify-content:space-between;
    padding:11px 13px;border-radius:9px;
    color:rgba(255,255,255,.86);
    font-size:13px;font-weight:700;
}
.lang-menu a:hover{background:rgba(239,63,121,.18);color:#fff}
.lang-menu a.on{color:#fff;background:linear-gradient(100deg,rgba(239,63,121,.34),rgba(255,114,46,.28))}

.nav-dl-btn{
    min-width:122px;height:48px;
    padding:0 16px;
    white-space:nowrap;   /* 各语言文案长短差很多，写死宽度会折行撑出按钮 */
    display:inline-flex;align-items:center;justify-content:center;gap:8px;
    color:#fff;
    border:1px solid rgba(255,255,255,.20);
    border-radius:13px;
    background:linear-gradient(105deg,#ef3f79 0%,#ff722e 100%);
    box-shadow:0 13px 29px rgba(239,63,121,.30),inset 0 1px 0 rgba(255,255,255,.16);
    font-size:12px;font-weight:900;
    transition:transform .22s ease,box-shadow .22s ease;
}
/* 下载图标是描边画的（一条线加箭头），用 fill 画不出来，必须给 stroke */
.nav-dl-btn svg{width:16px;height:16px;stroke:currentColor;fill:none;stroke-width:2;stroke-linecap:round;stroke-linejoin:round}
.nav-dl-btn:hover{transform:translateY(-2px);box-shadow:0 17px 34px rgba(239,63,121,.42)}

.nav-toggle{
    display:none;
    margin-left:auto;
    padding:8px 10px;
    border:1px solid rgba(255,255,255,.35);
    border-radius:10px;
    background:none;
    cursor:pointer;
}
.nav-toggle span{display:block;width:23px;height:2px;background:#fff;position:relative}
.nav-toggle span:before,.nav-toggle span:after{content:"";position:absolute;left:0;width:23px;height:2px;background:#fff}
.nav-toggle span:before{top:-7px}
.nav-toggle span:after{top:7px}

/* 首屏轮播 */
.slider{position:relative;z-index:5}
.stage{position:relative;height:610px}
.slide{
    position:absolute;inset:0;
    opacity:0;visibility:hidden;pointer-events:none;
    transform:translateX(35px);
    transition:opacity .65s ease,transform .65s ease,visibility .65s;
}
.slide.active{opacity:1;visibility:visible;pointer-events:auto;transform:none}
.hero-grid{height:100%;display:grid;grid-template-columns:1.02fr .98fr;align-items:center;gap:44px}
.hero-copy{padding:36px 0 78px}
.kicker{
    display:inline-flex;align-items:center;gap:9px;
    padding:8px 14px;margin-bottom:20px;
    border:1px solid var(--pink);
    border-radius:999px;
    background:rgba(239,63,121,.08);
    color:#fff;
    font-size:12px;font-weight:900;text-transform:uppercase;letter-spacing:.6px;
}
.kicker:before{content:"";width:7px;height:7px;border-radius:50%;background:var(--pink);box-shadow:0 0 12px var(--pink)}
.hero-title{margin:0 0 18px;font-size:68px;line-height:.98;font-weight:950;letter-spacing:-3px;color:#fff}
.hero-title .gradient{
    background:linear-gradient(90deg,#ed3a79,#ff762f);
    -webkit-background-clip:text;
    background-clip:text;
    -webkit-text-fill-color:transparent;
}
.hero-desc{max-width:610px;margin-bottom:25px;color:rgba(255,255,255,.88);font-size:19px;line-height:1.55}

.hero-art{position:relative;height:100%;display:flex;align-items:flex-end;justify-content:center;padding-bottom:24px}
.hero-phone{
    position:relative;z-index:3;
    max-height:620px;width:auto;object-fit:contain;
    filter:drop-shadow(0 34px 42px rgba(0,0,0,.45));
}
.live-card{
    position:absolute;right:3%;top:135px;z-index:6;
    width:128px;padding:18px 14px;
    border:1px solid #ff7a25;
    border-radius:14px;
    background:rgba(10,5,31,.86);
    text-align:center;
    box-shadow:0 16px 35px rgba(0,0,0,.28);
}
.live-card .live{font-weight:900;color:#f4477c}
.live-card strong{display:block;font-size:24px}
.live-card small{display:block;margin:2px 0 14px;color:#fff}
.live-card svg{width:38px;height:38px;fill:none;stroke:#ee4e91;stroke-width:2}
.gift-float{
    position:absolute;right:4%;bottom:110px;z-index:5;
    font-size:68px;
    filter:drop-shadow(0 16px 18px rgba(0,0,0,.3));
    animation:floatY 3s ease-in-out infinite;
}
@keyframes floatY{50%{transform:translateY(-12px)}}

.art-frame{width:100%;height:500px;display:flex;align-items:flex-end;justify-content:flex-end}
.art-frame img{
    width:115%;max-width:none;height:auto;object-fit:contain;object-position:right bottom;
    transform:translate(5%,4%);
    filter:drop-shadow(0 28px 35px rgba(0,0,0,.40)) drop-shadow(0 0 24px rgba(239,63,121,.20));
}

.slider-arrow{
    position:absolute;z-index:15;top:50%;
    width:50px;height:50px;
    display:grid;place-items:center;
    border:1px solid rgba(255,255,255,.38);
    border-radius:50%;
    background:rgba(10,5,31,.56);
    color:#fff;
    font-size:28px;line-height:1;
    cursor:pointer;
    box-shadow:0 12px 30px rgba(0,0,0,.24),inset 0 1px 0 rgba(255,255,255,.10);
    backdrop-filter:blur(10px);
    -webkit-backdrop-filter:blur(10px);
    transform:translateY(-50%);
    transition:transform .2s ease,background .2s ease,border-color .2s ease,box-shadow .2s ease;
}
.slider-prev{left:22px}
.slider-next{right:22px}
@media (hover:hover) and (pointer:fine){
    .slider-arrow:hover{background:linear-gradient(145deg,var(--pink),var(--orange));border-color:rgba(255,255,255,.72)}
    .slider-prev:hover{transform:translateY(-50%) translateX(-2px) scale(1.05)}
    .slider-next:hover{transform:translateY(-50%) translateX(2px) scale(1.05)}
}
.slider-arrow:active{transform:translateY(-50%) scale(.94)}

.slider-dots{
    position:absolute;left:50%;bottom:22px;z-index:16;
    display:flex;gap:7px;
    padding:7px 9px;
    border:1px solid rgba(255,255,255,.14);
    border-radius:999px;
    background:rgba(7,4,28,.30);
    backdrop-filter:blur(8px);
    -webkit-backdrop-filter:blur(8px);
    transform:translateX(-50%);
}
.slider-dot{
    width:9px;height:9px;padding:0;
    border:0;border-radius:999px;
    background:#fff;
    opacity:.58;
    cursor:pointer;
    transition:width .25s ease,opacity .25s ease,background .25s ease;
}
.slider-dot.active{width:27px;opacity:1;background:linear-gradient(90deg,var(--pink),var(--orange))}

/* ---------- 关于 ---------------------------------------------------------- */

.intro-wrap{display:grid;grid-template-columns:.88fr 1.12fr;gap:54px;align-items:center}
.eyebrow{
    display:inline-block;
    padding:6px 10px;margin-bottom:14px;
    border-radius:999px;
    background:#fff0f5;
    color:var(--pink);
    font-size:11px;font-weight:900;text-transform:uppercase;
}
.intro-copy p{margin-bottom:22px;font-size:16px;line-height:1.75;color:var(--muted)}
.intro-visual{position:relative}
.intro-visual:after{
    content:"";
    position:absolute;right:-45px;top:25px;z-index:0;
    width:160px;height:160px;
    border-radius:50%;
    background:radial-gradient(circle,var(--pink) 0 2px,transparent 2.4px);
    background-size:14px 14px;
    opacity:.35;
}
.intro-visual img{
    position:relative;z-index:1;
    display:block;width:100%;
    border-radius:24px;
    box-shadow:0 30px 60px rgba(20,8,45,.28);
}

/* ---------- 功能 ---------------------------------------------------------- */

.features-panel{
    margin-top:34px;padding:18px;
    border:1px solid var(--line);
    border-radius:24px;
    background:#fff;
    box-shadow:var(--shadow);
}
.features-grid{display:grid;grid-template-columns:repeat(5,1fr);gap:12px}
.feature-card{
    min-height:146px;padding:18px 12px;
    display:flex;flex-direction:column;align-items:center;justify-content:center;
    border:1px solid #eee8f0;
    border-radius:14px;
    background:#fff;
    text-align:center;
    color:var(--text);
    transition:.22s;
}
.feature-card:hover{transform:translateY(-4px);box-shadow:0 14px 28px rgba(37,19,55,.09);border-color:#ffd1df}
.feature-card img{width:48px;height:48px;object-fit:contain;margin-bottom:12px}
.feature-card h3{font-size:14px;font-weight:900;margin:0 0 6px}
.feature-card p{font-size:11px;line-height:1.45;color:var(--muted);margin:0}

/* ---------- 主播 ---------------------------------------------------------- */

.live-box{
    padding:38px 30px 30px;
    border-radius:25px;
    color:#fff;
    background:linear-gradient(135deg,#13062c 0%,#09041e 100%);
    box-shadow:0 24px 55px rgba(13,6,36,.20);
}
.live-box .section-title{color:#fff}
.live-box .section-copy{color:rgba(255,255,255,.72);margin:0 auto}
.live-grid{display:grid;grid-template-columns:repeat(6,1fr);gap:13px;margin-top:28px}
.live-tile{position:relative;padding:7px;border:1px solid #f14e8f;border-radius:14px;background:rgba(255,255,255,.06);overflow:hidden}
.live-tile img{width:100%;display:block;border-radius:10px;aspect-ratio:3/4;object-fit:cover}
.live-badge{position:absolute;left:11px;bottom:12px;padding:4px 7px;border-radius:6px;background:var(--pink);font-size:9px;font-weight:900}

/* ---------- 使用方法 ------------------------------------------------------ */

.how-grid{display:grid;grid-template-columns:1fr 310px;gap:60px;align-items:center}
.steps{position:relative;display:grid;grid-template-columns:repeat(4,1fr);margin-top:35px}
.steps:before{content:"";position:absolute;left:8%;right:8%;top:29px;height:2px;background:linear-gradient(90deg,var(--pink),#ffc0d1)}
.step{position:relative;z-index:1;text-align:center}
.step-icon{
    width:60px;height:60px;
    display:grid;place-items:center;
    margin:0 auto 12px;
    border:4px solid #fff;
    border-radius:50%;
    background:linear-gradient(145deg,var(--pink),var(--orange));
    color:#fff;
    box-shadow:0 0 0 1px #ffd3df,0 10px 24px rgba(239,63,121,.22);
}
.step-icon svg{width:20px;height:20px;stroke:#fff;fill:none;stroke-width:2}
.step b{display:block;color:var(--pink);font-size:12px}
.step h4{font-size:13px;font-weight:900;margin:2px 0 5px}
.step p{font-size:10px;color:var(--muted);margin:0}
.how-visual img{width:100%;max-height:300px;object-fit:contain}

/* ---------- 帮助 ---------------------------------------------------------- */

.help-card{
    display:grid;grid-template-columns:1fr .78fr;gap:25px;align-items:center;
    padding:36px;
    border:1px solid var(--line);
    border-radius:24px;
    background:#fff;
    box-shadow:var(--shadow);
}
.help-list{margin-top:24px}
.help-link{
    display:flex;align-items:center;justify-content:space-between;
    padding:16px 0;
    border-bottom:1px solid #eee9f0;
    color:var(--text);
}
.help-link strong{display:block;font-size:14px}
.help-link span small{display:block;font-size:11px;color:var(--muted)}
.help-link svg{width:18px;height:18px;stroke:var(--muted);fill:none;stroke-width:2;flex:0 0 18px}
.help-link:hover svg{stroke:var(--pink)}
.help-visual{text-align:center}
.help-visual img{width:min(100%,420px);max-height:280px;object-fit:contain}

/* ---------- 底部下载条 ---------------------------------------------------- */

.download-band{padding:58px 0;color:#fff;background:linear-gradient(110deg,#eb3e75 0%,#ff6d28 100%)}
.download-band .wrap{text-align:center}
.download-band h2{font-size:34px;font-weight:900;margin-bottom:8px}
.download-band p{margin-bottom:22px;color:rgba(255,255,255,.9)}
.download-band .platform-grid{margin:0 auto}

/* ---------- 页脚 ---------------------------------------------------------- */

.footer{padding:58px 0 24px;color:#fff;background:#08051f}
.footer-grid{display:grid;grid-template-columns:1.45fr repeat(3,1fr);gap:38px}
.footer .logo img{width:150px;margin-bottom:12px}
.footer p{color:rgba(255,255,255,.68);font-size:13px;line-height:1.7}
.footer h4{font-size:14px;font-weight:900;margin:0 0 16px}
.footer a{display:block;color:rgba(255,255,255,.76);font-size:12px;margin-bottom:9px}
.footer a:hover{color:#fff}
.socials{display:flex;gap:8px;margin-top:16px}
.socials a{
    width:31px;height:31px;margin:0;
    display:grid;place-items:center;
    border-radius:50%;
    background:linear-gradient(145deg,var(--pink),var(--orange));
    color:#fff;font-size:11px;font-weight:900;
}
.copyright{
    margin-top:35px;padding-top:21px;
    border-top:1px solid rgba(255,255,255,.09);
    text-align:center;
    color:rgba(255,255,255,.5);
    font-size:11px;
}

/* ---------- 响应式 -------------------------------------------------------- */

@media(max-width:1100px){
    .wrap{width:min(100% - 32px,980px)}
    .hero-title{font-size:58px}
    .stage{height:620px}
    .hero-grid{grid-template-columns:1fr 1fr;gap:20px}
    .live-card{right:0}
    .features-grid{grid-template-columns:repeat(3,1fr)}
    .live-grid{grid-template-columns:repeat(3,1fr)}
    .footer-grid{grid-template-columns:1.4fr repeat(2,1fr)}
    .platform-grid{grid-template-columns:repeat(2,minmax(0,180px));max-width:368px}
    .lang-btn,.nav-dl-btn{min-width:108px}
}

@media(max-width:991px){
    .site-nav{padding:14px 0}
    .site-nav .wrap{gap:10px}
    .nav-toggle{display:block;flex:0 0 auto}
    .lang{margin-left:auto}
    .lang .lang-btn{min-width:0;height:44px;padding:0 11px}
    /* 语言名要留着，不然按钮上只剩一个地球图标，看不出当前是哪种语言 */
    /* 下载按钮不再隐藏，缩成图标按钮 */
    .nav-dl-btn{display:inline-flex;min-width:0;width:44px;height:44px;padding:0;flex:0 0 auto}
    .nav-dl-btn span{display:none}
    .nav-dl-btn svg{width:19px;height:19px}
    .lang-menu{min-width:150px}
    .nav-links{
        position:absolute;left:0;right:0;top:70px;z-index:50;
        display:none;
        flex-direction:column;align-items:stretch;
        padding:15px;
        border-radius:14px;
        background:rgba(8,5,31,.98);
        box-shadow:0 20px 40px rgba(0,0,0,.28);
    }
    .nav-open .nav-links{display:flex}
    .nav-links a:after{display:none}
    .nav-links a.active{color:#ff6b9d}

    .stage{height:auto;min-height:980px}
    .hero-grid{grid-template-columns:1fr;padding-top:20px}
    .hero-copy{padding:28px 0 15px;text-align:center}
    .hero-desc{margin-left:auto;margin-right:auto}
    .platform-grid{justify-content:center;margin:auto}
    .hero-art{height:450px;align-items:center}
    .hero-phone{max-height:430px}
    .live-card{top:65px;right:12%}
    .art-frame{height:430px}
    .intro-wrap,.how-grid,.help-card{grid-template-columns:1fr}
    .intro-copy{text-align:center}
    .intro-copy .section-copy{margin:auto}
    .intro-visual{max-width:690px;margin:auto}
    .how-visual{max-width:330px;margin:auto}
    .footer-grid{grid-template-columns:repeat(2,1fr)}
}

@media(max-width:767px){
    .wrap{width:min(100% - 24px,650px)}
    .section{padding:64px 0}
    .section-title{font-size:32px}
    .brand img{width:88px}
    .stage{min-height:900px}
    .hero-title{font-size:48px;letter-spacing:-2px}
    .hero-desc{font-size:16px}
    .platform-grid{grid-template-columns:1fr 1fr;width:100%;max-width:360px}
    .platform-btn{min-height:52px;padding:6px 8px}
    .platform-icon{width:33px;height:33px;flex-basis:33px;border-radius:9px}
    .hero-art{height:410px}
    .hero-phone{max-height:390px}
    .live-card{width:105px;right:0;padding:12px 8px}
    .gift-float{font-size:50px}
    .slider-arrow{width:42px;height:42px;font-size:22px;top:auto;bottom:18px}
    .slider-prev{left:15px}
    .slider-next{right:15px}
    .slider-dots{bottom:31px}
    .art-frame{height:380px}
    .features-grid{grid-template-columns:repeat(2,1fr)}
    .live-grid{grid-template-columns:repeat(2,1fr)}
    .steps{grid-template-columns:repeat(2,1fr);gap:30px 8px}
    .steps:before{display:none}
    .help-card{padding:25px 20px}
    .download-band h2{font-size:28px}
}

@media(max-width:520px){
    .stage{min-height:890px}
    .hero-title{font-size:42px}
    .hero-copy{padding-top:15px}
    .platform-grid{grid-template-columns:1fr;max-width:230px}
    .hero-art{height:370px}
    .hero-phone{max-height:360px}
    .art-frame{height:330px}
    .feature-card{min-height:135px}
    .footer-grid{grid-template-columns:1fr}
}

/* 窄屏手机（≤400px）：语言按钮 + 下载按钮 + 菜单三样挤一行会顶出屏幕，
   收一收间距和尺寸，箭头去掉（地球图标已经说明这是语言菜单），保证 320px 也不溢出 */
@media(max-width:400px){
    .site-nav .wrap{gap:7px}
    .brand img{width:76px}
    .lang .lang-btn{height:40px;padding:0 9px}
    .lang-btn span ~ svg{display:none}
    .nav-dl-btn{width:40px;height:40px}
    .nav-dl-btn svg{width:18px;height:18px}
    .nav-toggle{padding:8px}
    .nav-toggle span,
    .nav-toggle span:before,
    .nav-toggle span:after{width:20px}
}

@media(prefers-reduced-motion:reduce){
    .slide,.btn,.slider-arrow,.slider-dot,.gift-float,.platform-btn{
        animation:none!important;
        transition:none!important;
    }
}