/* ============================================================
   殇痕画质助手 shyhzzs.cn —— 「帧率战备指挥所」主题
   白 #ffffff · 云蓝 #eef7fe · 墨黑 #0d1726 · 天蓝 #2fb3f7 · 战备橙 #ff8a1e
   准星圆环 + 战备卡 + 解锁序列 + 军械架 + 横向胶卷 + 作战口令 + 战备领取台
   阴影语言：每个大区块外容器仅一组且全页参数唯一；内部卡片零阴影靠细线分层
   ============================================================ */
:root{
  --ink:#0d1726;
  --ink2:#132238;
  --ink3:#1b3050;
  --sky:#2fb3f7;
  --sky-d:#1a8fd4;
  --sky-l:#7fd0fb;
  --org:#ff8a1e;
  --org-d:#e56f04;
  --cloud:#eef7fe;
  --txt:#1d2b3f;
  --line:rgba(13,23,38,.14);
  --line-d:rgba(255,255,255,.16);
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei","Segoe UI",sans-serif;color:var(--txt);background:#fff;line-height:1.8;font-size:16px;-webkit-font-smoothing:antialiased}
img{max-width:100%;height:auto;display:block}
a{text-decoration:none;color:inherit}
ul,ol{list-style:none}
button{font-family:inherit;cursor:pointer}
.wrap{max-width:1180px;margin:0 auto;padding:0 24px}
[id]{scroll-margin-top:84px}

/* ---------- 按钮 ---------- */
.btn{display:inline-flex;align-items:center;justify-content:center;font-weight:700;border-radius:10px;transition:transform .18s,box-shadow .18s,background .18s;white-space:nowrap;border:2px solid transparent}
.btn:hover{transform:translateY(-2px)}
.btn-sky{background:var(--sky);color:#fff}
.btn-sky:hover{background:var(--sky-l)}
.btn-ink{background:var(--ink);color:#fff}
.btn-ink:hover{background:var(--ink3)}
.btn-lg{padding:13px 30px;font-size:16px}
.btn-xl{padding:16px 44px;font-size:18px}

/* ---------- 头部 ---------- */
.hd{position:sticky;top:0;z-index:60;background:rgba(13,23,38,.97);backdrop-filter:blur(8px);border-bottom:3px solid var(--sky)}
.hd-in{display:flex;align-items:center;gap:22px;height:64px}
.brand{display:flex;align-items:center;gap:10px;color:#fff}
.brand img{border-radius:50%}
.brand-t{display:flex;flex-direction:column;line-height:1.2}
.brand-t strong{font-size:18px;letter-spacing:1px}
.brand-t small{font-size:10px;letter-spacing:2px;color:rgba(255,255,255,.52)}
.nav{display:flex;gap:4px;margin-left:auto}
.nav a{padding:8px 11px;font-size:14px;color:rgba(255,255,255,.76);border-bottom:2px solid transparent}
.nav a:hover{color:#fff}
.nav a.on{color:var(--sky-l);border-bottom-color:var(--sky-l)}
.hd-cta{padding:9px 22px;font-size:14px;box-shadow:0 2px 0 rgba(0,0,0,.35)}
.burger{display:none;flex-direction:column;gap:5px;background:none;border:0;margin-left:12px;padding:6px}
.burger span{width:24px;height:2px;background:#fff;transition:.25s}

/* ---------- 区块通用 ---------- */
.sec{padding:80px 0}
.sec-white{background:#fff}
.sec-cloud{background:var(--cloud)}
.sec-ink{background:var(--ink);color:#f4faff;border-top:4px solid var(--sky)}
.sec-h{max-width:740px;margin-bottom:40px}
.kick{font-size:12px;letter-spacing:3px;font-weight:700;color:var(--sky-d);margin-bottom:12px;display:flex;align-items:center;gap:10px;text-transform:uppercase}
.sec-ink .kick{color:var(--org)}
.kick-lab{background:var(--sky);color:#fff;font-style:normal;font-size:11px;letter-spacing:2px;padding:3px 10px;border-radius:5px}
.sec-h h2{font-size:31px;line-height:1.35;letter-spacing:.5px;color:var(--ink)}
.sec-ink .sec-h h2{color:#fff}
.sec-p{margin-top:10px;color:#54687f;font-size:15.5px}
.sec-ink .sec-p{color:rgba(244,250,255,.66)}

/* ---------- 英雄区 · 靶场校准台 ---------- */
.hero{background:radial-gradient(640px 420px at 90% 6%,rgba(255,138,30,.1),transparent 60%),radial-gradient(700px 500px at 0% 100%,rgba(47,179,247,.16),transparent 62%),linear-gradient(180deg,#dff1fd 0%,#eef7fe 58%,#f7fcff 100%);padding:70px 0;border-bottom:4px solid var(--sky);position:relative;overflow:hidden}
.hero-in{display:grid;grid-template-columns:1.04fr .96fr;gap:52px;align-items:center}
.hero h1{font-size:58px;line-height:1.1;letter-spacing:4px;color:var(--ink);margin:16px 0 14px;position:relative;display:inline-block}
.hero h1::after{content:"";position:absolute;left:0;bottom:-6px;width:74px;height:5px;background:linear-gradient(90deg,var(--sky),var(--org));border-radius:3px}
.hero-slogan{font-size:22px;font-weight:700;color:var(--ink);margin-bottom:18px}
.hero-slogan i{font-style:normal;color:var(--sky-d)}
.lead{color:#42566d;font-size:15.5px;max-width:560px}
.hero-acts{display:flex;gap:14px;margin:26px 0 18px;flex-wrap:wrap}
.hero-acts .btn-sky{box-shadow:0 14px 30px rgba(47,179,247,.38)}
.hero-acts .btn-ink{box-shadow:0 10px 22px rgba(13,23,38,.24)}
.hero-tags{display:flex;flex-wrap:wrap;gap:9px;margin-bottom:16px}
.hero-tags li{font-size:13px;padding:4px 13px;border:1px solid rgba(255,138,30,.55);border-radius:18px;color:var(--org-d);background:rgba(255,255,255,.6)}
.hero-note{font-size:13px;color:#7b8ca0;display:flex;align-items:center;gap:8px}
.dot{width:8px;height:8px;border-radius:50%;background:var(--org);box-shadow:0 0 0 4px rgba(255,138,30,.16);flex:0 0 auto}

/* 靶场校准台 */
.range{position:relative;height:520px;border-radius:20px;border:1px solid rgba(47,179,247,.3);background:linear-gradient(160deg,#f4fbff 0%,#e2f2fd 100%);box-shadow:0 28px 60px rgba(13,23,38,.16);overflow:hidden}
.rg-ring{position:absolute;border:1.5px dashed rgba(47,179,247,.5);border-radius:50%}
.rg-r1{width:420px;height:420px;left:50%;top:46%;transform:translate(-50%,-50%)}
.rg-r2{width:270px;height:270px;left:50%;top:46%;transform:translate(-50%,-50%);border-color:rgba(255,138,30,.45)}
.rg-cross{position:absolute;background:rgba(13,23,38,.14)}
.rg-ch{left:6%;right:6%;top:46%;height:1.5px}
.rg-cv{top:8%;bottom:8%;left:50%;width:1.5px}
.rg-main{position:absolute;left:50%;top:50%;transform:translate(-56%,-50%);width:220px;border:3px solid var(--ink);border-radius:16px;overflow:hidden;background:#fff;z-index:3}
.rg-main img{width:100%;height:auto}
.rg-mini{position:absolute;right:4%;bottom:7%;width:132px;border:3px solid var(--sky);border-radius:12px;overflow:hidden;background:#fff;transform:rotate(7deg);z-index:4}
.rg-mini img{width:100%;height:auto}
.rg-chip{position:absolute;font-size:12.5px;font-weight:700;padding:8px 13px;border-radius:10px;background:var(--ink);color:#fff;z-index:5}
.rg-chip b{color:var(--sky-l);margin-right:2px}
.rg-c1{left:5%;top:12%}
.rg-c2{right:7%;top:26%;background:var(--org)}
.rg-c2 b{color:#fff}
.rg-tag{position:absolute;left:5%;bottom:5%;font-size:11px;font-weight:800;letter-spacing:3px;color:rgba(13,23,38,.4);z-index:5}

/* ---------- 支持版本 · 战备卡 ---------- */
.vers{display:grid;grid-template-columns:repeat(4,1fr);gap:18px}
.ver{position:relative;background:#fff;border:1px solid var(--line);border-top:4px solid var(--sky);border-radius:12px;padding:24px 18px 20px;transition:border-color .2s,transform .2s}
.ver:hover{transform:translateY(-4px)}
.v-b{border-top-color:var(--org)}
.v-d{border-top-color:var(--org)}
.ver-no{position:absolute;top:12px;right:14px;font-size:11px;font-weight:800;letter-spacing:2px;color:rgba(13,23,38,.35)}
.ver b{display:block;font-size:17px;color:var(--ink);margin-bottom:8px;letter-spacing:.5px}
.ver p{font-size:13.5px;color:#54687f;line-height:1.7;margin-bottom:14px}
.ver-pkg{display:block;font-size:11px;color:var(--sky-d);background:var(--cloud);border-radius:6px;padding:5px 9px;word-break:break-all}

/* ---------- 画质解锁 · 解锁序列 ---------- */
.unl{display:grid;grid-template-columns:1.25fr .75fr;gap:26px;align-items:start}
.unl-seq li{display:flex;align-items:center;gap:18px;background:var(--ink2);border:1px solid var(--line-d);border-left:5px solid var(--sky);border-radius:12px;padding:20px 20px;margin-bottom:14px}
.unl-seq li:nth-child(2){border-left-color:var(--org)}
.unl-seq li:nth-child(3){border-left-color:var(--sky-l)}
.us-no{flex:0 0 auto;font-size:12px;font-weight:800;letter-spacing:2px;color:#fff;background:var(--sky);padding:6px 11px;border-radius:7px}
.unl-seq li:nth-child(2) .us-no{background:var(--org)}
.unl-seq li:nth-child(3) .us-no{background:var(--sky-d)}
.us-txt{flex:1}
.us-txt b{display:block;font-size:17.5px;color:#fff;margin-bottom:5px}
.us-txt p{font-size:13.5px;color:rgba(244,250,255,.66);line-height:1.7}
.us-lv{flex:0 0 auto;font-size:12px;font-weight:700;color:var(--sky-l);border:1px solid rgba(127,208,251,.5);padding:5px 11px;border-radius:16px}
.unl-seq li:nth-child(2) .us-lv{color:#ffc38a;border-color:rgba(255,138,30,.5)}
.unl-side{display:flex;flex-direction:column;gap:16px}
.us-shot{border:2px solid var(--sky);border-radius:12px;overflow:hidden;width:100%;max-width:282px;margin:0 auto}
.us-shot img{width:100%;height:auto}
.us-tune{background:var(--ink2);border:1px solid var(--line-d);border-radius:12px;padding:18px}
.us-tune b{display:block;font-size:15px;color:#fff;margin-bottom:10px}
.us-chips{display:flex;gap:8px;margin-bottom:10px}
.us-chips span{font-size:12.5px;font-weight:700;color:var(--ink);background:var(--sky-l);padding:5px 13px;border-radius:6px}
.us-chips span:nth-child(2){background:#ffc38a}
.us-chips span:nth-child(3){background:#fff}
.us-tune p{font-size:13px;color:rgba(244,250,255,.62)}

/* ---------- 数字绸带 ---------- */
.ribbon{background:linear-gradient(90deg,var(--sky-d),var(--sky));padding:30px 0;box-shadow:inset 0 -4px 0 rgba(13,23,38,.2)}
.ribbon-in{display:grid;grid-template-columns:repeat(4,1fr);gap:18px}
.rb-i{text-align:center;color:#fff;border-right:1px solid rgba(255,255,255,.3)}
.rb-i:last-child{border-right:0}
.rb-i b{font-size:34px;font-weight:800;line-height:1.1}
.rb-i i{font-style:normal;font-size:14px;margin-left:2px}
.rb-i span{display:block;font-size:12.5px;color:rgba(255,255,255,.85);margin-top:4px}

/* ---------- 常用工具 · 军械架 ---------- */
.tools{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
.tool{background:#fff;border:1px solid var(--line);border-radius:12px;padding:22px 20px;position:relative;transition:transform .2s,border-color .2s}
.tool:hover{transform:translateY(-3px);border-color:var(--sky)}
.tool::after{content:"";position:absolute;left:20px;right:20px;bottom:0;height:3px;background:linear-gradient(90deg,var(--sky),transparent);border-radius:2px}
.tl-ico{display:inline-flex;align-items:center;justify-content:center;min-width:40px;height:40px;padding:0 8px;background:var(--ink);color:var(--sky-l);font-size:14px;font-weight:800;border-radius:9px;margin-bottom:12px}
.tool:nth-child(3n+2) .tl-ico{background:var(--org);color:#fff}
.tool b{display:block;font-size:16.5px;color:var(--ink);margin-bottom:7px}
.tool p{font-size:13.5px;color:#54687f;line-height:1.7}

/* ---------- 应用画面 · 横向胶卷 ---------- */
.reel{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}
.rl{border:1px solid var(--line);border-radius:12px;overflow:hidden;background:var(--cloud)}
.rl-bar{display:flex;justify-content:space-between;align-items:center;background:var(--ink);color:#fff;padding:9px 13px}
.rl-bar span{font-size:11px;font-weight:800;letter-spacing:2px;color:var(--sky-l)}
.rl-bar em{font-style:normal;font-size:12px}
.rl-f{padding:12px;display:flex;justify-content:center}
.rl-f img{width:100%;max-width:180px;height:auto;border-radius:8px}

/* ---------- 上手口令 ---------- */
.orders{display:grid;grid-template-columns:1.2fr .8fr;gap:26px;align-items:center}
.od-steps{display:flex;flex-direction:column;gap:14px}
.od{position:relative;background:#fff;border:1px solid var(--line);border-left:5px solid var(--sky);border-radius:12px;padding:20px 22px 18px 74px}
.od:nth-child(2){border-left-color:var(--org)}
.od-no{position:absolute;left:18px;top:20px;font-size:11px;font-weight:800;letter-spacing:1px;color:#fff;background:var(--ink);padding:5px 9px;border-radius:6px;writing-mode:vertical-lr}
.od b{display:block;font-size:17px;color:var(--ink);margin-bottom:6px}
.od p{font-size:14px;color:#54687f;line-height:1.75}
.od-shot{border:3px solid var(--ink);border-radius:16px;overflow:hidden;max-width:240px;margin:0 auto;box-shadow:10px 10px 0 rgba(47,179,247,.35)}
.od-shot img{width:100%;height:auto}

/* ---------- FAQ 手风琴 ---------- */
.faq{max-width:860px}
.fq{border:1px solid var(--line);border-radius:12px;margin-bottom:12px;background:#fff;overflow:hidden;box-shadow:0 16px 32px rgba(13,23,38,.07)}
.fq-q{width:100%;display:flex;justify-content:space-between;align-items:center;gap:14px;background:none;border:0;text-align:left;padding:18px 22px;font-size:16px;font-weight:700;color:var(--ink)}
.fq-q i{flex:0 0 auto;width:12px;height:12px;border-right:2.5px solid var(--sky-d);border-bottom:2.5px solid var(--sky-d);transform:rotate(45deg);transition:transform .25s}
.fq.open .fq-q i{transform:rotate(-135deg)}
.fq-q span{border-left:4px solid var(--sky);padding-left:12px}
.fq.open .fq-q span{border-left-color:var(--org)}
.fq-a{max-height:0;overflow:hidden;transition:max-height .3s ease}
.fq-a p{padding:0 22px 20px 38px;font-size:14.5px;color:#42566d;line-height:1.85}

/* ---------- 战友留言 ---------- */
.notes{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
.note{background:var(--ink2);border:1px solid var(--line-d);border-radius:12px;padding:20px;position:relative}
.note::before{content:"";position:absolute;top:0;left:20px;width:34px;height:4px;background:var(--sky);border-radius:0 0 3px 3px}
.note:nth-child(3n+2)::before{background:var(--org)}
.nt-head{display:flex;justify-content:space-between;align-items:center;margin-bottom:10px}
.nt-head b{font-size:15px;color:#fff}
.nt-star{font-size:12px;color:var(--org);letter-spacing:2px}
.nt-txt{font-size:13.8px;color:rgba(244,250,255,.78);line-height:1.8;margin-bottom:12px}
.nt-time{font-size:12px;color:rgba(244,250,255,.45)}

/* ---------- 下载 · 战备领取台 ---------- */
.sec-get{padding:84px 0;background:linear-gradient(180deg,#f7fcff 0%,#dff1fd 100%);border-top:4px solid var(--sky)}
.gt-panel{position:relative;max-width:560px;margin:0 auto;border:3px solid var(--ink);border-radius:20px;background:#fff;box-shadow:14px 14px 0 rgba(255,138,30,.3)}
.gt-beam{position:absolute;top:-3px;left:8%;right:8%;height:6px;background:linear-gradient(90deg,transparent,var(--sky),transparent)}
.gt-card{padding:40px 36px 32px;text-align:center}
.gt-logo img{margin:0 auto 14px;border-radius:50%;border:3px solid var(--sky)}
.gt-name{display:block;font-size:26px;color:var(--ink);letter-spacing:2px;margin-bottom:6px}
.gt-sub{font-size:15px;color:#54687f;margin-bottom:20px}
.gt-rows{display:flex;justify-content:center;gap:12px;flex-wrap:wrap;margin-bottom:24px}
.gt-rows span{border:1px solid var(--line);border-radius:9px;padding:8px 14px;font-size:12.5px}
.gt-rows i{font-style:normal;color:#7b8ca0;margin-right:6px}
.gt-rows b{color:var(--ink)}
.gt-btn{width:100%;box-shadow:0 16px 34px rgba(47,179,247,.4)}
.gt-note{margin-top:14px;font-size:12.5px;color:#7b8ca0}

/* ---------- 页脚 ---------- */
.ft{background:var(--ink);color:rgba(255,255,255,.72);border-top:4px solid var(--org)}
.ft-in{display:flex;justify-content:space-between;align-items:center;gap:20px;padding:30px 24px 22px;flex-wrap:wrap}
.ft .brand img{border-radius:50%}
.ft-links{display:flex;gap:20px}
.ft-links a{font-size:14px;color:rgba(255,255,255,.72)}
.ft-links a:hover{color:var(--sky-l)}
.ft-icp{padding:0 24px 8px;font-size:13px}
.ft-icp a{color:rgba(255,255,255,.5)}
.ft-icp a:hover{color:var(--sky-l)}
.ft-c{padding:0 24px 26px;font-size:13px;color:rgba(255,255,255,.45)}

/* ---------- 返回顶部 / 入场 ---------- */
.backtop{position:fixed;right:24px;bottom:24px;z-index:70;width:44px;height:44px;border:0;border-radius:10px;background:var(--ink);color:#fff;font-size:20px;line-height:1;opacity:0;pointer-events:none;transition:opacity .25s,transform .25s;transform:translateY(8px)}
.backtop.show{opacity:1;pointer-events:auto;transform:translateY(0)}
.backtop:hover{background:var(--sky-d)}
.rv{opacity:0;transform:translateY(22px);transition:opacity .55s ease,transform .55s ease}
.rv.in{opacity:1;transform:none}

/* ---------- 响应式 ---------- */
@media(max-width:960px){
  [id]{scroll-margin-top:72px}
  .nav{position:fixed;top:64px;right:0;left:0;background:rgba(13,23,38,.98);flex-direction:column;padding:10px 20px 16px;gap:2px;display:none;border-bottom:3px solid var(--sky)}
  .nav.open{display:flex}
  .nav a{padding:10px 6px;font-size:15px}
  .burger{display:flex}
  .hd-cta{margin-left:auto}
  .hero{padding:46px 0}
  .hero-in{grid-template-columns:1fr;gap:34px}
  .hero h1{font-size:40px;letter-spacing:2px}
  .range{height:460px;max-width:420px;margin:0 auto;width:100%}
  .rg-main{width:188px}
  .rg-mini{width:112px}
  .sec{padding:56px 0}
  .sec-h h2{font-size:25px}
  .vers{grid-template-columns:repeat(2,1fr)}
  .unl{grid-template-columns:1fr}
  .tools{grid-template-columns:repeat(2,1fr)}
  .reel{display:flex;overflow-x:auto;scroll-snap-type:x mandatory;padding-bottom:10px;margin:0 -24px;padding-left:24px;padding-right:24px}
  .rl{flex:0 0 200px;scroll-snap-align:start}
  .orders{grid-template-columns:1fr}
  .od-shot{margin-top:6px}
  .notes{grid-template-columns:1fr}
  .ribbon-in{grid-template-columns:repeat(2,1fr);gap:20px}
  .rb-i:nth-child(2){border-right:0}
  .backtop{right:16px;bottom:24px;width:42px;height:42px}
}
@media(prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{animation:none!important;transition:none!important}
  .rv{opacity:1;transform:none}
}