/* ==========================================================================
   拓飞 GEO — 站点样式
   设计语言：纸墨底 + 朱砂红 + 哑光金，宋体标题 / 雅黑正文
   ========================================================================== */

:root{
  --ink:#0E0F10;
  --ink-2:#1B1D1F;
  --ink-soft:#4A4E52;
  --paper:#F7F5F2;
  --paper-2:#EFEBE5;
  --white:#FFFFFF;
  --red:#A40000;
  --red-deep:#7E0000;
  --gold:#C5A059;
  --line:rgba(14,15,16,.13);
  --line-dark:rgba(255,255,255,.14);
  --serif:"Songti SC","Source Han Serif SC","Noto Serif SC","STSong",Georgia,serif;
  --sans:"Microsoft YaHei","PingFang SC","Hiragino Sans GB","Helvetica Neue",Arial,sans-serif;
  --mono:"SFMono-Regular",Consolas,"Liberation Mono",Menlo,monospace;
  --wrap:1180px;
  --pad:clamp(20px,5vw,48px);
}

*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;background:var(--paper);color:var(--ink);
  font-family:var(--sans);font-size:16px;line-height:1.8;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
h1,h2,h3,h4{font-family:var(--serif);font-weight:600;line-height:1.28;margin:0;letter-spacing:.01em}
p{margin:0}
ul,ol{margin:0;padding:0;list-style:none}
hr{border:0;border-top:1px solid var(--line);margin:0}
::selection{background:var(--red);color:#fff}

.wrap{max-width:var(--wrap);margin:0 auto;padding:0 var(--pad)}
.section{padding:clamp(64px,8vw,112px) 0}
.section--tight{padding:clamp(44px,5vw,72px) 0}
.section--paper2{background:var(--paper-2)}
.section--ink{background:var(--ink);color:#EDEAE6}
.section--ink h1,.section--ink h2,.section--ink h3{color:#fff}

/* ---------- 顶部 ---------- */
.topbar{background:var(--ink);color:rgba(255,255,255,.62);font-size:12.5px;letter-spacing:.06em}
.topbar .wrap{display:flex;justify-content:space-between;gap:16px;height:36px;align-items:center}
.topbar a{color:rgba(255,255,255,.62)}
.topbar a:hover{color:var(--gold)}
.topbar .dot{display:inline-block;width:6px;height:6px;background:#39C46E;border-radius:50%;margin-right:7px;vertical-align:1px}

header.site{position:sticky;top:0;z-index:60;background:rgba(247,245,242,.92);backdrop-filter:blur(12px);border-bottom:1px solid var(--line)}
.nav{display:flex;align-items:center;justify-content:space-between;height:74px;gap:24px}
.brand{display:flex;align-items:center;gap:11px;font-family:var(--serif);font-size:20px;letter-spacing:.06em}
.brand .mark{
  width:34px;height:34px;background:var(--red);color:#fff;border-radius:4px;
  display:grid;place-items:center;font-size:17px;font-family:var(--serif);letter-spacing:0;
}
.brand small{display:block;font-family:var(--mono);font-size:9.5px;letter-spacing:.22em;color:var(--ink-soft);line-height:1;margin-top:4px}
.nav-links{display:flex;align-items:center;gap:30px;font-size:14.5px}
.nav-links a{position:relative;padding:4px 0;color:var(--ink-soft)}
.nav-links a:hover,.nav-links a[aria-current="page"]{color:var(--ink)}
.nav-links a[aria-current="page"]::after{content:"";position:absolute;left:0;right:0;bottom:-2px;height:2px;background:var(--red)}
.nav-cta{display:flex;align-items:center;gap:12px}
.burger{display:none;width:40px;height:40px;border:1px solid var(--line);background:none;border-radius:4px;cursor:pointer}
.burger span{display:block;width:16px;height:1.5px;background:var(--ink);margin:4px auto}

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:9px;
  height:48px;padding:0 26px;border-radius:3px;border:1px solid transparent;
  font-size:14.5px;letter-spacing:.04em;cursor:pointer;transition:.22s ease;
  font-family:var(--sans);
}
.btn--red{background:var(--red);color:#fff}
.btn--red:hover{background:var(--red-deep)}
.btn--ink{background:var(--ink);color:#fff}
.btn--ink:hover{background:#000}
.btn--ghost{border-color:rgba(255,255,255,.3);color:#fff}
.btn--ghost:hover{background:rgba(255,255,255,.09)}
.btn--line{border-color:var(--line);color:var(--ink);background:transparent}
.btn--line:hover{border-color:var(--ink)}
.btn--sm{height:38px;padding:0 16px;font-size:13px}
.link-arrow{font-size:14px;color:var(--red);letter-spacing:.04em;display:inline-flex;gap:7px;align-items:center}
.link-arrow:hover{gap:12px}

/* ---------- 标题组 ---------- */
.eyebrow{
  font-family:var(--mono);font-size:11.5px;letter-spacing:.24em;text-transform:uppercase;
  color:var(--ink-soft);display:flex;align-items:center;gap:10px;margin-bottom:20px;
}
.eyebrow::before{content:"";width:22px;height:1px;background:var(--red)}
.section--ink .eyebrow{color:rgba(255,255,255,.55)}
.h-xl{font-size:clamp(34px,5.4vw,68px);letter-spacing:-.01em;line-height:1.16}
.h-lg{font-size:clamp(27px,3.4vw,42px);line-height:1.24}
.h-md{font-size:clamp(21px,2.2vw,27px);line-height:1.34}
.h-sm{font-size:18px;line-height:1.45}
.lead{font-size:clamp(15.5px,1.35vw,18px);line-height:1.85;color:var(--ink-soft);max-width:64ch}
.section--ink .lead{color:rgba(255,255,255,.68)}
.sec-head{max-width:760px;margin-bottom:clamp(36px,5vw,58px)}
.sec-head .lead{margin-top:18px}
.num{font-family:var(--mono);font-size:11.5px;letter-spacing:.2em;color:var(--gold)}

/* ---------- 首屏 ---------- */
.hero{
  position:relative;overflow:hidden;background:var(--ink);color:#EDEAE6;
  padding:clamp(72px,10vw,132px) 0 clamp(56px,7vw,90px);
}
.hero::before{
  content:"";position:absolute;inset:0;
  background-image:linear-gradient(rgba(255,255,255,.045) 1px,transparent 1px),
                   linear-gradient(90deg,rgba(255,255,255,.045) 1px,transparent 1px);
  background-size:64px 64px;mask-image:radial-gradient(ellipse at 30% 20%,#000 20%,transparent 78%);
}
.hero::after{
  content:"";position:absolute;width:720px;height:720px;right:-220px;top:-260px;border-radius:50%;
  background:radial-gradient(circle,rgba(164,0,0,.42),transparent 66%);filter:blur(10px);
}
.hero .wrap{position:relative;z-index:2}
.hero h1{font-size:clamp(31px,4.4vw,56px);line-height:1.2;letter-spacing:-.01em;color:#fff}
.hero h1 em{font-style:normal;color:var(--gold)}
.hero .lead{margin-top:26px;font-size:clamp(15.5px,1.5vw,19px);color:rgba(255,255,255,.72);max-width:62ch}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:38px}
.hero-note{margin-top:22px;font-size:12.5px;letter-spacing:.05em;color:rgba(255,255,255,.42);font-family:var(--mono)}
.hero-grid{display:grid;grid-template-columns:1.12fr .88fr;gap:clamp(32px,5vw,72px);align-items:center}

.answer-card{
  border:1px solid rgba(255,255,255,.16);background:rgba(255,255,255,.035);
  border-radius:6px;padding:22px 22px 18px;backdrop-filter:blur(4px);
}
.answer-card .q{font-size:12px;letter-spacing:.12em;color:rgba(255,255,255,.45);font-family:var(--mono);margin-bottom:12px}
.answer-card .body{font-size:14.5px;line-height:1.9;color:rgba(255,255,255,.85)}
.answer-card .body .hl{background:rgba(197,160,89,.2);color:#F4E4C1;padding:1px 4px;border-radius:2px;border-bottom:1px solid var(--gold)}
.answer-card .src{margin-top:16px;padding-top:13px;border-top:1px dashed rgba(255,255,255,.16);display:flex;flex-wrap:wrap;gap:8px}
.chip{font-family:var(--mono);font-size:10.5px;letter-spacing:.06em;padding:4px 9px;border:1px solid rgba(255,255,255,.18);border-radius:2px;color:rgba(255,255,255,.6)}
.chip--on{background:rgba(164,0,0,.28);border-color:rgba(164,0,0,.7);color:#FFD9D9}

/* ---------- 数据条 ---------- */
.stats{display:grid;grid-template-columns:repeat(4,1fr);border-top:1px solid var(--line-dark);margin-top:clamp(48px,6vw,76px);padding-top:30px;gap:20px}
.stats>div{position:relative;padding-left:18px}
.stats>div::before{content:"";position:absolute;left:0;top:6px;bottom:6px;width:2px;background:var(--red)}
.stats b{display:block;font-family:var(--serif);font-size:clamp(26px,3vw,36px);color:#fff;line-height:1.1}
.stats span{display:block;font-size:12.5px;color:rgba(255,255,255,.5);margin-top:8px;letter-spacing:.04em}

/* ---------- 卡片网格 ---------- */
.grid{display:grid;gap:1px;background:var(--line);border:1px solid var(--line);border-radius:6px;overflow:hidden}
.grid--2{grid-template-columns:repeat(2,1fr)}
.grid--3{grid-template-columns:repeat(3,1fr)}
.grid--4{grid-template-columns:repeat(4,1fr)}
.card{background:var(--paper);padding:clamp(24px,2.6vw,34px);transition:.25s ease;display:flex;flex-direction:column;height:100%}
.card:hover{background:#fff}
.section--paper2 .card{background:var(--paper-2)}
.card .idx{font-family:var(--mono);font-size:11px;letter-spacing:.18em;color:var(--gold);margin-bottom:16px}
.card h3{font-size:19px;margin-bottom:12px}
.card p{font-size:14.5px;line-height:1.82;color:var(--ink-soft)}
.card .tags{display:flex;flex-wrap:wrap;gap:6px;margin-top:18px}
.tag{font-size:11.5px;padding:3px 9px;border:1px solid var(--line);border-radius:2px;color:var(--ink-soft);background:rgba(255,255,255,.5)}
.card .more{margin-top:auto;padding-top:22px;font-size:13.5px;color:var(--red)}

/* ---------- 流程 ---------- */
.steps{counter-reset:s;display:grid;grid-template-columns:repeat(3,1fr);gap:1px;background:var(--line-dark);border:1px solid var(--line-dark)}
.step{background:var(--ink);padding:clamp(24px,2.6vw,34px);position:relative}
.step::before{
  counter-increment:s;content:"0" counter(s);
  font-family:var(--mono);font-size:12px;letter-spacing:.16em;color:var(--gold);display:block;margin-bottom:14px;
}
.step h4{font-size:17.5px;color:#fff;margin-bottom:10px}
.step p{font-size:14px;line-height:1.8;color:rgba(255,255,255,.6)}

/* ---------- 表格 ---------- */
.tbl{width:100%;border-collapse:collapse;font-size:14.5px}
.tbl th,.tbl td{text-align:left;padding:15px 16px;border-bottom:1px solid var(--line);vertical-align:top}
.tbl th{font-family:var(--sans);font-size:12.5px;letter-spacing:.08em;color:var(--ink-soft);font-weight:400;background:var(--paper-2)}
.tbl tr:hover td{background:rgba(255,255,255,.6)}
.tbl td:first-child{font-weight:600;white-space:nowrap}

/* ---------- FAQ ---------- */
.faq{border-top:1px solid var(--line)}
.faq details{border-bottom:1px solid var(--line)}
.faq summary{
  list-style:none;cursor:pointer;padding:22px 44px 22px 0;position:relative;
  font-family:var(--serif);font-size:17px;line-height:1.5;
}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:"+";position:absolute;right:6px;top:50%;transform:translateY(-50%);font-size:22px;color:var(--red);font-family:var(--sans);transition:.2s}
.faq details[open] summary::after{content:"−"}
.faq .a{padding:0 0 24px;font-size:14.8px;line-height:1.9;color:var(--ink-soft);max-width:78ch}

/* ---------- CTA ---------- */
.cta{background:var(--red);color:#fff;padding:clamp(48px,6vw,76px) 0}
.cta .wrap{display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:32px}
.cta h2{color:#fff;font-size:clamp(25px,3vw,38px)}
.cta p{color:rgba(255,255,255,.78);font-size:14.5px;margin-top:12px;max-width:52ch}
.cta .btn--ghost{border-color:rgba(255,255,255,.55)}
.cta .btn--paper{background:#fff;color:var(--red)}
.cta-actions{display:flex;gap:12px;flex-wrap:wrap}

/* ---------- 页头 ---------- */
.page-head{background:var(--ink);color:#EDEAE6;padding:clamp(52px,7vw,88px) 0 clamp(44px,5vw,64px);position:relative;overflow:hidden}
.page-head::after{content:"";position:absolute;width:560px;height:560px;right:-160px;top:-280px;border-radius:50%;background:radial-gradient(circle,rgba(164,0,0,.35),transparent 68%)}
.page-head .wrap{position:relative;z-index:2}
.crumb{font-family:var(--mono);font-size:11px;letter-spacing:.14em;color:rgba(255,255,255,.4);margin-bottom:20px}
.crumb a{color:rgba(255,255,255,.55)}
.crumb a:hover{color:var(--gold)}
.page-head h1{font-size:clamp(28px,4vw,50px);color:#fff;max-width:18em}
.page-head .lead{margin-top:20px;color:rgba(255,255,255,.7)}

/* ---------- 正文排版 ---------- */
.prose{max-width:760px}
.prose h2{font-size:clamp(23px,2.4vw,30px);margin:56px 0 18px}
.prose h3{font-size:19px;margin:36px 0 12px}
.prose p{font-size:15.5px;line-height:1.95;color:#33373A;margin:14px 0}
.prose ul,.prose ol{margin:16px 0 16px 2px}
.prose ul li,.prose ol li{font-size:15.5px;line-height:1.9;color:#33373A;padding-left:20px;position:relative;margin:8px 0}
.prose ul li::before{content:"";position:absolute;left:2px;top:12px;width:6px;height:6px;background:var(--red);border-radius:50%}
.prose ol{counter-reset:p}
.prose ol li{counter-increment:p}
.prose ol li::before{content:counter(p)".";position:absolute;left:0;top:0;font-family:var(--mono);font-size:13px;color:var(--red)}
.prose blockquote{margin:26px 0;padding:18px 22px;border-left:3px solid var(--red);background:var(--paper-2);font-size:15px;color:#3A3D40}
.prose strong{color:var(--ink);font-weight:700}
.prose code{font-family:var(--mono);font-size:13.5px;background:var(--paper-2);padding:1px 6px;border-radius:2px}

/* ---------- 侧栏布局 ---------- */
.split{display:grid;grid-template-columns:minmax(0,1fr) 300px;gap:clamp(32px,5vw,72px);align-items:start}
.aside{position:sticky;top:100px;border:1px solid var(--line);border-radius:6px;padding:26px;background:var(--paper-2)}
.aside h4{font-size:15px;margin-bottom:14px}
.aside p{font-size:13.5px;color:var(--ink-soft);line-height:1.8;margin-bottom:18px}
.aside ul li{font-size:13.5px;padding:9px 0;border-bottom:1px solid var(--line);color:var(--ink-soft)}
.aside ul li:last-child{border:0}

/* ---------- 价格说明（不标价） ---------- */
.note-box{border:1px solid var(--line);border-left:3px solid var(--gold);background:var(--paper-2);padding:22px 24px;border-radius:0 4px 4px 0}
.note-box h4{font-size:15px;margin-bottom:8px}
.note-box p{font-size:13.8px;color:var(--ink-soft);line-height:1.85}

/* ---------- 表单 ---------- */
.form{display:grid;gap:16px}
.field{display:grid;gap:7px}
.field label{font-size:13px;letter-spacing:.04em;color:var(--ink-soft)}
.field input,.field select,.field textarea{
  width:100%;padding:13px 14px;border:1px solid var(--line);border-radius:3px;
  font-family:var(--sans);font-size:14.5px;background:#fff;color:var(--ink);outline:none;transition:.2s;
}
.field input:focus,.field select:focus,.field textarea:focus{border-color:var(--red);box-shadow:0 0 0 3px rgba(164,0,0,.08)}
.field textarea{min-height:110px;resize:vertical}
.form-note{font-size:12.5px;color:var(--ink-soft);line-height:1.7}
.form-status{font-size:13.5px;color:var(--red);min-height:20px}

/* ---------- 页脚 ---------- */
footer.site{background:var(--ink);color:rgba(255,255,255,.55);padding:clamp(48px,6vw,72px) 0 32px;font-size:13.5px}
footer.site .cols{display:grid;grid-template-columns:1.6fr 1fr 1fr 1fr;gap:clamp(24px,4vw,48px)}
footer.site h5{font-family:var(--serif);font-size:14.5px;color:#fff;margin:0 0 16px;font-weight:600;letter-spacing:.05em}
footer.site a{color:rgba(255,255,255,.55);display:block;padding:5px 0}
footer.site a:hover{color:var(--gold)}
footer.site .brand{color:#fff;margin-bottom:16px}
footer.site .brand .mark{background:var(--red)}
footer.site .brand small{color:rgba(255,255,255,.4)}
footer.site .desc{max-width:34ch;line-height:1.85;font-size:13px}
.bottom{border-top:1px solid rgba(255,255,255,.1);margin-top:44px;padding-top:22px;display:flex;flex-wrap:wrap;gap:14px;justify-content:space-between;font-size:12px;color:rgba(255,255,255,.38);font-family:var(--mono);letter-spacing:.04em}

/* ---------- 界面截图与视频 ---------- */
.gallery{display:grid;grid-template-columns:repeat(2,1fr);gap:clamp(14px,2vw,22px);margin-top:30px}
.shot{margin:0;border:1px solid var(--line);border-radius:6px;overflow:hidden;background:var(--paper-2);transition:.25s ease}
.shot:hover{border-color:rgba(164,0,0,.4);box-shadow:0 8px 24px rgba(14,15,16,.07)}
.shot img{width:100%;aspect-ratio:16/10;object-fit:cover;display:block;background:var(--paper-2)}
.shot figcaption{font-size:12.5px;color:var(--ink-soft);padding:11px 15px;border-top:1px solid var(--line);background:var(--paper);display:flex;gap:8px;align-items:baseline}
.shot figcaption b{font-family:var(--mono);font-weight:400;font-size:11px;color:var(--gold);letter-spacing:.1em}

.video{position:relative;display:block;width:100%;aspect-ratio:16/9;border:1px solid var(--line);border-radius:6px;overflow:hidden;background:#0E0F10;padding:0;cursor:pointer;margin-top:26px}
.video img{width:100%;height:100%;object-fit:cover;display:block;opacity:.92;transition:.3s}
.video:hover img{opacity:1;transform:scale(1.012)}
.video__hint{position:absolute;left:16px;bottom:14px;font-family:var(--mono);font-size:11px;letter-spacing:.08em;color:rgba(255,255,255,.55);background:rgba(0,0,0,.4);padding:4px 8px;border-radius:2px}

.modal{position:fixed;inset:0;z-index:200;display:none;place-items:center;padding:20px;background:rgba(8,8,9,.9);backdrop-filter:blur(4px)}
.modal.open{display:grid}
.modal video{width:min(1100px,94vw);max-height:86vh;border-radius:4px;background:#000}
.modal__close{position:absolute;top:18px;right:22px;width:42px;height:42px;border:1px solid rgba(255,255,255,.3);background:transparent;color:#fff;font-size:20px;border-radius:50%;cursor:pointer}
.modal__note{color:rgba(255,255,255,.65);font-size:14px;text-align:center;max-width:46ch;line-height:1.9}

/* ---------- 产品卡 ---------- */
.pcard{display:grid;grid-template-columns:1.05fr .95fr;gap:0;border:1px solid var(--line);border-radius:8px;overflow:hidden;background:var(--paper);margin-bottom:clamp(20px,3vw,32px)}
.pcard__media{position:relative;background:var(--ink);overflow:hidden}
.pcard__media img{width:100%;height:100%;object-fit:cover;opacity:.95;min-height:260px}
.pcard__badge{position:absolute;left:14px;top:14px;font-family:var(--mono);font-size:10.5px;letter-spacing:.12em;padding:5px 9px;border-radius:2px;background:rgba(164,0,0,.92);color:#fff}
.pcard__body{padding:clamp(24px,3vw,38px);display:flex;flex-direction:column}
.pcard__body h3{font-size:clamp(20px,2.2vw,26px);margin-bottom:12px}
.pcard__body p{font-size:14.5px;line-height:1.85;color:var(--ink-soft)}
.pcard__body ul{margin:16px 0 0}
.pcard__body ul li{font-size:13.5px;line-height:1.9;color:var(--ink-soft);padding-left:18px;position:relative}
.pcard__body ul li::before{content:"";position:absolute;left:2px;top:11px;width:5px;height:5px;background:var(--gold);border-radius:50%}
.pcard__actions{margin-top:auto;padding-top:24px;display:flex;gap:10px;flex-wrap:wrap}

/* ---------- 响应式 ---------- */
/* 7 个导航项在 1080px 以下会挤压，提前收进抽屉 */
@media (max-width:1080px){
  .nav-links{
    position:fixed;inset:74px 0 auto;background:var(--paper);flex-direction:column;
    align-items:stretch;gap:0;padding:8px 20px 20px;border-bottom:1px solid var(--line);
    display:none;
  }
  .nav-links.open{display:flex}
  .nav-links a{padding:14px 0;border-bottom:1px solid var(--line);font-size:15px}
  .nav-links a[aria-current="page"]::after{display:none}
  .burger{display:block}
}
@media (max-width:980px){
  .hero-grid{grid-template-columns:1fr}
  .answer-card{margin-top:8px}
  .grid--4,.grid--3,.steps{grid-template-columns:repeat(2,1fr)}
  .split{grid-template-columns:1fr}
  .aside{position:static}
  footer.site .cols{grid-template-columns:1fr 1fr}
}
@media (max-width:720px){
  .topbar{display:none}
  .nav{height:64px}
  .brand small{display:none}
  .brand{font-size:18px}
  .nav-links{
    position:fixed;inset:64px 0 auto;background:var(--paper);flex-direction:column;
    align-items:stretch;gap:0;padding:8px 20px 20px;border-bottom:1px solid var(--line);
    display:none;
  }
  .nav-links.open{display:flex}
  .nav-links a{padding:14px 0;border-bottom:1px solid var(--line);font-size:15px}
  .nav-links a[aria-current="page"]::after{display:none}
  .burger{display:block}
  .nav-cta .btn{display:none}
  .grid--2,.grid--3,.grid--4,.steps{grid-template-columns:1fr}
  .stats{grid-template-columns:1fr 1fr;gap:24px 12px}
  .cta .wrap{flex-direction:column;align-items:flex-start}
  footer.site .cols{grid-template-columns:1fr}
  .tbl{font-size:13px}
  .tbl th,.tbl td{padding:12px 10px}
  .gallery{grid-template-columns:1fr}
  .pcard{grid-template-columns:1fr}
  .pcard__media img{min-height:200px;aspect-ratio:16/10}
}

@media print{
  header.site,footer.site,.cta,.topbar{display:none}
  body{background:#fff}
}