/* ============================================================
   Subtitle Edit 中文官网  www.subtitleedit.cn
   配色取自品牌 Logo：主红 #E03028 / 深红 #B91F1A / 墨黑 #1F2430
   ============================================================ */
:root{
  --red:#E03028;
  --red-dark:#B91F1A;
  --red-light:#FBE9E8;
  --ink:#1F2430;
  --ink-2:#3A4152;
  --gray:#6B7280;
  --line:#E8EAEF;
  --bg:#FFFFFF;
  --bg-soft:#F7F8FA;
  --radius:14px;
  --shadow:0 10px 30px rgba(31,36,48,.08);
  --shadow-lg:0 24px 60px rgba(31,36,48,.16);
  --maxw:1180px;
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  font-family:"PingFang SC","Microsoft YaHei","Helvetica Neue",Arial,"Noto Sans SC",sans-serif;
  color:var(--ink);background:var(--bg);line-height:1.75;
  -webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility;
}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
ul,ol{list-style:none}
.wrap{width:100%;max-width:var(--maxw);margin:0 auto;padding:0 24px}
section{padding:88px 0}
::selection{background:var(--red);color:#fff}

/* ---------- 通用小元素 ---------- */
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:14px;font-weight:600;letter-spacing:2px;color:var(--red);
  text-transform:uppercase;margin-bottom:14px;
}
.eyebrow::before{content:"";width:26px;height:3px;background:var(--red);border-radius:2px}
.sec-title{font-size:clamp(26px,3.4vw,38px);font-weight:800;line-height:1.3;letter-spacing:.5px}
.sec-sub{color:var(--gray);max-width:680px;margin-top:14px;font-size:16.5px}
.center{text-align:center}
.center .sec-sub{margin-left:auto;margin-right:auto}
.center .eyebrow::before{display:none}

.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:10px;
  padding:14px 32px;border-radius:999px;font-size:16px;font-weight:700;
  cursor:pointer;border:2px solid transparent;transition:all .25s ease;
  line-height:1.4;
}
.btn svg{flex:none}
.btn-primary{background:var(--red);color:#fff;box-shadow:0 8px 22px rgba(224,48,40,.32)}
.btn-primary:hover{background:var(--red-dark);transform:translateY(-2px);box-shadow:0 14px 30px rgba(224,48,40,.4)}
.btn-outline{border-color:#B9CCE8;color:var(--ink);background:rgba(255,255,255,.6)}
.btn-outline:hover{background:#fff;border-color:#7FA8DC;color:#1D4ED8}
.btn-ghost{border-color:var(--line);color:var(--ink);background:#fff}
.btn-ghost:hover{border-color:var(--red);color:var(--red)}
.btn-lg{padding:17px 42px;font-size:17px}

.tag{display:inline-block;padding:4px 14px;border-radius:999px;background:var(--red-light);color:var(--red-dark);font-size:13px;font-weight:600}

/* ---------- 顶部导航 ---------- */
.header{
  position:sticky;top:0;z-index:100;background:rgba(255,255,255,.92);
  backdrop-filter:saturate(160%) blur(12px);-webkit-backdrop-filter:saturate(160%) blur(12px);
  border-bottom:1px solid var(--line);
}
.nav{display:flex;align-items:center;justify-content:space-between;height:72px}
.brand{display:flex;align-items:center;gap:12px;font-weight:800;font-size:20px;letter-spacing:.3px}
.brand img{width:40px;height:40px;border-radius:9px}
.brand small{display:block;font-size:12px;font-weight:500;color:var(--gray);letter-spacing:1px}
.nav-links{display:flex;align-items:center;gap:6px}
.nav-links a{padding:9px 16px;border-radius:8px;font-size:15.5px;font-weight:600;color:var(--ink-2);transition:.2s}
.nav-links a:hover{color:var(--red);background:var(--red-light)}
.nav-links a.active{color:var(--red);background:var(--red-light)}
.nav-cta{margin-left:10px;padding:10px 24px;font-size:15px}
.nav-toggle{display:none;background:none;border:0;cursor:pointer;padding:8px}
.nav-toggle span{display:block;width:24px;height:2.5px;background:var(--ink);border-radius:2px;margin:5px 0;transition:.25s}
.nav-toggle.open span:nth-child(1){transform:translateY(7.5px) rotate(45deg)}
.nav-toggle.open span:nth-child(2){opacity:0}
.nav-toggle.open span:nth-child(3){transform:translateY(-7.5px) rotate(-45deg)}

/* ---------- 面包屑导航 ---------- */
.crumbs{background:var(--bg-soft);border-bottom:1px solid var(--line)}
.crumbs ol{
  display:flex;flex-wrap:wrap;align-items:center;gap:8px;
  padding:14px 0;font-size:14px;color:var(--gray);
}
.crumbs li{display:flex;align-items:center;gap:8px}
.crumbs li+li::before{content:"/";color:#C4CAD4}
.crumbs a{color:var(--ink-2);font-weight:600;transition:.2s}
.crumbs a:hover{color:var(--red)}
.crumbs [aria-current]{color:var(--gray);font-weight:500}

/* ---------- Hero ---------- */
.hero{
  position:relative;overflow:hidden;color:var(--ink);
  background:linear-gradient(135deg,#EAF3FE 0%,#DCEBFC 52%,#CFE3FB 100%);
}
.hero::before{
  content:"";position:absolute;inset:0;
  background:
    radial-gradient(circle at 82% 18%,rgba(255,255,255,.75),transparent 36%),
    radial-gradient(circle at 8% 92%,rgba(125,168,222,.22),transparent 42%);
}
.hero .wrap{position:relative;display:grid;grid-template-columns:1.05fr .95fr;gap:56px;align-items:center;padding-top:88px;padding-bottom:96px}
.hero-badge{display:inline-flex;align-items:center;gap:8px;background:rgba(255,255,255,.75);border:1px solid #C3D8F2;color:#1D4ED8;padding:7px 18px;border-radius:999px;font-size:14px;font-weight:600;margin-bottom:24px}
.hero h1{font-size:clamp(34px,4.6vw,56px);line-height:1.18;font-weight:900;letter-spacing:1px;color:#14213B}
.hero h1 em{font-style:normal;position:relative;white-space:nowrap}
.hero h1 em::after{content:"";position:absolute;left:0;right:0;bottom:6px;height:12px;background:rgba(37,99,235,.16);border-radius:3px;z-index:-1}
.hero p.lead{margin:22px 0 34px;font-size:18px;color:#46536B;max-width:560px}
.hero-actions{display:flex;gap:16px;flex-wrap:wrap}
.hero-stats{display:flex;gap:44px;margin-top:48px;flex-wrap:wrap}
.hero-stats .num{font-size:30px;font-weight:800;color:#14213B}
.hero-stats .lbl{font-size:13.5px;color:#5B6B86;margin-top:2px}
.hero-visual{position:relative}
.hero-shot{
  border-radius:16px;box-shadow:0 30px 70px rgba(30,64,140,.28);
  border:6px solid rgba(255,255,255,.65);width:100%;
}
.hero-card{
  position:absolute;left:-34px;bottom:26px;background:#fff;color:var(--ink);
  border-radius:12px;padding:14px 20px;box-shadow:var(--shadow-lg);
  display:flex;align-items:center;gap:12px;font-weight:700;font-size:14.5px;
}
.hero-card img{width:34px;height:34px;border-radius:8px}

/* ---------- 特性/卡片网格 ---------- */
.grid{display:grid;gap:26px}
.grid-3{grid-template-columns:repeat(3,1fr)}
.grid-4{grid-template-columns:repeat(4,1fr)}
.grid-2{grid-template-columns:repeat(2,1fr)}
.card{
  background:#fff;border:1px solid var(--line);border-radius:var(--radius);
  padding:32px 28px;transition:all .28s ease;
}
.card:hover{transform:translateY(-6px);box-shadow:var(--shadow);border-color:#F3C7C5}
.card .ic{
  width:56px;height:56px;border-radius:14px;background:var(--red-light);
  display:flex;align-items:center;justify-content:center;margin-bottom:20px;
}
.card .ic svg{width:28px;height:28px;stroke:var(--red)}
.card h3{font-size:19px;font-weight:800;margin-bottom:10px}
.card p{color:var(--gray);font-size:15px}

/* ---------- 使用场景 ---------- */
.scenes{background:var(--bg-soft)}
.scene{
  display:grid;grid-template-columns:120px 1fr;gap:26px;align-items:start;
  background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:30px 32px;
  transition:all .25s ease;
}
.scene:hover{box-shadow:var(--shadow);transform:translateX(6px)}
.scene .no{
  width:64px;height:64px;border-radius:16px;background:linear-gradient(135deg,var(--red),#F0573F);
  color:#fff;font-size:26px;font-weight:900;display:flex;align-items:center;justify-content:center;
}
.scene h3{font-size:19px;font-weight:800;margin-bottom:6px}
.scene p{color:var(--gray);font-size:15px}
.scene-list{display:grid;gap:18px}

/* ---------- 用户评价 ---------- */
.review{display:flex;flex-direction:column;gap:16px}
.review .stars{color:#F5A623;letter-spacing:3px;font-size:17px}
.review p{color:var(--ink-2);font-size:15.5px;flex:1}
.review .who{display:flex;align-items:center;gap:12px;border-top:1px dashed var(--line);padding-top:16px}
.review .avatar{
  width:44px;height:44px;border-radius:50%;background:var(--red-light);color:var(--red-dark);
  font-weight:800;display:flex;align-items:center;justify-content:center;font-size:17px;
}
.review .who b{display:block;font-size:14.5px}
.review .who span{font-size:13px;color:var(--gray)}

/* ---------- CTA 横幅 ---------- */
.cta-band{background:linear-gradient(135deg,#1F2430,#343B4E);color:#fff;border-radius:22px;padding:64px 56px;text-align:center;position:relative;overflow:hidden}
.cta-band::before{content:"";position:absolute;width:340px;height:340px;border-radius:50%;background:rgba(224,48,40,.28);filter:blur(80px);top:-120px;right:-80px}
.cta-band h2{font-size:clamp(24px,3vw,34px);font-weight:800;margin-bottom:14px;position:relative}
.cta-band p{color:rgba(255,255,255,.78);margin-bottom:30px;position:relative}
.cta-band .btn{position:relative}

/* ---------- 下载中心 ---------- */
.dl-hero{background:linear-gradient(135deg,#C2241D,#E03028 55%,#F0573F);color:#fff;padding:80px 0;text-align:center}
.dl-hero h1{font-size:clamp(30px,4vw,44px);font-weight:900}
.dl-hero p{margin-top:14px;color:rgba(255,255,255,.9);font-size:17px}
.ver-pill{display:inline-flex;gap:10px;align-items:center;background:rgba(0,0,0,.18);border:1px solid rgba(255,255,255,.28);padding:8px 20px;border-radius:999px;font-size:14px;font-weight:600;margin-bottom:22px}
.dl-card{text-align:left;display:flex;flex-direction:column}
.dl-card .plat{display:flex;align-items:center;gap:16px;margin-bottom:18px}
.dl-card .plat .ic{width:52px;height:52px;border-radius:13px;background:var(--red-light);display:flex;align-items:center;justify-content:center}
.dl-card .plat .ic svg{width:26px;height:26px;fill:var(--red)}
.dl-card h3{font-size:20px;font-weight:800}
.dl-card .meta{font-size:13.5px;color:var(--gray)}
.dl-card ul{margin:6px 0 22px;display:grid;gap:8px}
.dl-card li{font-size:14.5px;color:var(--ink-2);padding-left:22px;position:relative}
.dl-card li::before{content:"";position:absolute;left:0;top:9px;width:12px;height:12px;border-radius:50%;background:var(--red-light);border:3px solid var(--red);box-sizing:border-box}
.dl-card .btn{margin-top:auto;width:100%}
.notice{border:1px solid #F5D9A8;background:#FFF9EF;border-radius:var(--radius);padding:22px 26px;color:#8A6116;font-size:14.5px;display:flex;gap:14px}
.notice svg{flex:none;width:22px;height:22px;fill:#D89A2B;margin-top:2px}

/* ---------- 历史版本 ---------- */
.ver-table{width:100%;border-collapse:collapse;background:#fff;border-radius:var(--radius);overflow:hidden;box-shadow:0 0 0 1px var(--line)}
.ver-table th,.ver-table td{padding:16px 20px;text-align:left;font-size:14.5px;border-bottom:1px solid var(--line)}
.ver-table th{background:var(--bg-soft);font-weight:700;color:var(--ink-2);white-space:nowrap}
.ver-table tr:last-child td{border-bottom:0}
.ver-table tbody tr{transition:background .2s}
.ver-table tbody tr:hover{background:#FBFCFE}
.ver-table .v-num{font-weight:800;color:var(--ink);white-space:nowrap}
.ver-table .v-date{color:var(--gray);white-space:nowrap}
.ver-table .v-note{color:var(--gray);font-size:13.5px}
.ver-table .v-dl{white-space:nowrap}
.ver-table .v-dl a{color:var(--red);font-weight:700;font-size:13.5px}
.ver-table .v-dl a:hover{text-decoration:underline}
.ver-note{font-size:13px;color:var(--gray);margin-top:14px}
@media (max-width:760px){
  .ver-scroll{overflow-x:auto;-webkit-overflow-scrolling:touch}
  .ver-table{min-width:680px}
}

/* ---------- 步骤/教程 ---------- */
.steps{counter-reset:step;display:grid;gap:0}
.step{display:grid;grid-template-columns:72px 1fr;gap:24px;padding:30px 0;border-bottom:1px dashed var(--line)}
.step:last-child{border-bottom:0}
.step::before{
  counter-increment:step;content:counter(step,decimal-leading-zero);
  font-size:30px;font-weight:900;color:var(--red);line-height:1.2;
}
.step h3{font-size:18.5px;font-weight:800;margin-bottom:6px}
.step p{color:var(--gray);font-size:15px}
.step code{background:var(--bg-soft);border:1px solid var(--line);padding:2px 8px;border-radius:6px;font-size:13.5px;color:var(--red-dark)}

/* ---------- FAQ ---------- */
.faq details{border:1px solid var(--line);border-radius:12px;padding:0;margin-bottom:14px;background:#fff;overflow:hidden}
.faq summary{cursor:pointer;padding:20px 24px;font-weight:700;font-size:16px;list-style:none;display:flex;justify-content:space-between;align-items:center;gap:16px}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:"+";font-size:24px;color:var(--red);font-weight:400;transition:.2s;flex:none}
.faq details[open] summary::after{transform:rotate(45deg)}
.faq details p{padding:0 24px 22px;color:var(--gray);font-size:15px}

/* ---------- 关于页 ---------- */
.about-hero{background:var(--bg-soft);padding:80px 0}
.about-grid{display:grid;grid-template-columns:1fr 1fr;gap:60px;align-items:center}
.about-grid h1{font-size:clamp(28px,3.6vw,40px);font-weight:900;margin-bottom:18px}
.about-grid p{color:var(--ink-2);margin-bottom:14px;font-size:16px}
.fact-row{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;margin-top:28px}
.fact{background:#fff;border:1px solid var(--line);border-radius:12px;padding:20px;text-align:center}
.fact b{display:block;font-size:26px;color:var(--red);font-weight:900}
.fact span{font-size:13.5px;color:var(--gray)}

/* ---------- 页脚 ---------- */
.footer{background:#171B26;color:#B7BDCB;padding:64px 0 0}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:44px;padding-bottom:48px}
.footer .brand{color:#fff}
.footer p{font-size:14px;margin-top:14px;max-width:320px}
.footer h4{color:#fff;font-size:15.5px;margin-bottom:16px;font-weight:700}
.footer li{margin-bottom:10px}
.footer a{font-size:14px;transition:.2s}
.footer a:hover{color:#fff}
.footer-bottom{border-top:1px solid rgba(255,255,255,.09);padding:20px 0;font-size:13px;display:flex;justify-content:space-between;gap:14px;flex-wrap:wrap;color:#8B93A5}

/* ---------- 下载弹窗 ---------- */
.modal-mask{
  position:fixed;inset:0;background:rgba(15,18,26,.62);z-index:200;
  display:none;align-items:center;justify-content:center;padding:20px;
  backdrop-filter:blur(4px);-webkit-backdrop-filter:blur(4px);
}
.modal-mask.show{display:flex;animation:fadeIn .22s ease}
.modal{
  background:#fff;border-radius:20px;max-width:560px;width:100%;
  padding:38px 36px 34px;position:relative;box-shadow:var(--shadow-lg);
  animation:pop .28s cubic-bezier(.2,.9,.3,1.2);max-height:92vh;overflow:auto;
}
.modal-close{
  position:absolute;top:16px;right:16px;width:36px;height:36px;border-radius:50%;
  border:0;background:var(--bg-soft);cursor:pointer;font-size:20px;color:var(--gray);transition:.2s;line-height:1;
}
.modal-close:hover{background:var(--red-light);color:var(--red)}
.modal h3{text-align:center;font-size:22px;font-weight:900}
.modal .sub{text-align:center;color:var(--gray);font-size:14.5px;margin:8px 0 26px}
.qr-row{display:grid;grid-template-columns:1fr 1fr;gap:22px}
.qr-box{border:1px solid var(--line);border-radius:14px;padding:20px 16px;text-align:center;transition:.2s}
.qr-box:hover{border-color:var(--red);box-shadow:var(--shadow)}
.qr-box img{width:150px;height:150px;margin:0 auto 12px;border-radius:8px}
.qr-box b{display:block;font-size:15px}
.qr-box span{font-size:12.5px;color:var(--gray)}
.modal .direct{
  margin-top:24px;display:block;text-align:center;font-size:14px;color:var(--gray);
}
.modal .direct a{color:var(--red);font-weight:700}
.modal .direct a:hover{text-decoration:underline}
@keyframes fadeIn{from{opacity:0}to{opacity:1}}
@keyframes pop{from{opacity:0;transform:scale(.92) translateY(14px)}to{opacity:1;transform:none}}

/* ---------- 滚动显现 ---------- */
.reveal{opacity:0;transform:translateY(26px);transition:opacity .6s ease,transform .6s ease}
.reveal.in{opacity:1;transform:none}

/* ---------- 响应式 ---------- */
@media (max-width:960px){
  .hero .wrap{grid-template-columns:1fr;padding-top:64px;padding-bottom:72px}
  .hero-card{left:12px}
  .grid-4{grid-template-columns:repeat(2,1fr)}
  .grid-3{grid-template-columns:repeat(2,1fr)}
  .about-grid{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr 1fr}
}
@media (max-width:680px){
  section{padding:64px 0}
  .nav-links{
    position:fixed;top:72px;left:0;right:0;background:#fff;flex-direction:column;
    align-items:stretch;padding:16px 20px 22px;border-bottom:1px solid var(--line);
    box-shadow:var(--shadow);display:none;
  }
  .nav-links.show{display:flex}
  .nav-links a{padding:13px 14px;font-size:16px}
  .nav-cta{margin:8px 0 0}
  .nav-toggle{display:block}
  .grid-4,.grid-3,.grid-2{grid-template-columns:1fr}
  .scene{grid-template-columns:1fr;gap:16px}
  .qr-row{grid-template-columns:1fr}
  .cta-band{padding:48px 26px}
  .footer-grid{grid-template-columns:1fr}
  .hero-stats{gap:26px}
}