/* ============================================================
   PRINTFORGE · Printing Machinery Manufacturer
   设计语言: 报刊排版风 (Press Typographic)
   新闻纸白 #F6F3EC / 油墨黑 #1A1713 / 印刷品红 #C1187B
   报头 masthead / 粗黑 rule 线 / 多栏 column-rule / 图注体系
   字体: HarmonyOS Sans (Black 报头与头条, 图注小字宽字距)
   入场动画: 油墨显影 (blur + opacity)
   ============================================================ */

:root{
    --c-paper:#F6F3EC;
    --c-white:#FDFCF9;
    --c-ink:#1A1713;
    --c-text:#57534B;
    --c-magenta:#C1187B;
    --c-hair:#D9D3C7;
    --c-rule:#1A1713;
    --font:'HarmonyOS Sans',system-ui,-apple-system,'Segoe UI',sans-serif;
    --page:min(142rem,calc(100% - 8rem));
    --nav-h:5.6rem;
}

*{margin:0;padding:0;box-sizing:border-box;}
html{scroll-behavior:smooth;font-size:clamp(9px,0.6945vw,11px);}
body{font-family:var(--font);font-size:1.6rem;line-height:1.65;color:var(--c-ink);background:var(--c-paper);-webkit-font-smoothing:antialiased;}
img{display:block;max-width:100%;}
a{text-decoration:none;color:inherit;}
button{font-family:inherit;border:none;background:none;cursor:pointer;}
section{scroll-margin-top:calc(var(--nav-h) + 2rem);}

.index_page{width:var(--page);margin:0 auto;}

/* ---------- 按钮: 铅字块方角 ---------- */
.index_btn{display:inline-flex;align-items:center;justify-content:center;padding:1.5rem 3.4rem;font-size:1.4rem;font-weight:700;letter-spacing:.14em;text-transform:uppercase;line-height:1;border:1px solid var(--c-ink);transition:all .25s;white-space:nowrap;}
.index_btn--ink{background:var(--c-ink);color:var(--c-paper);}
.index_btn--ink:hover{background:var(--c-magenta);border-color:var(--c-magenta);color:#fff;}
.index_btn--paper{background:var(--c-paper);border-color:var(--c-paper);color:var(--c-ink);}
.index_btn--paper:hover{background:var(--c-magenta);border-color:var(--c-magenta);color:#fff;}

.index_arrowlink{display:inline-flex;align-items:center;gap:.9rem;font-size:1.4rem;font-weight:700;letter-spacing:.1em;text-transform:uppercase;color:var(--c-ink);border-bottom:2px solid var(--c-ink);padding-bottom:.5rem;transition:color .25s,border-color .25s;}
.index_arrowlink:hover{color:var(--c-magenta);border-color:var(--c-magenta);}
.index_arrowlink i{font-size:1.6rem;}

/* ---------- 报头 masthead ---------- */
.index_mast{position:sticky;top:calc(-1 * var(--mast-collapse,10.4rem));z-index:90;background:var(--c-paper);}
.index_mast-brand{display:grid;grid-template-columns:1fr auto 1fr;align-items:center;gap:2rem;padding:2.4rem 0 2rem;border-bottom:1px solid var(--c-ink);}
.index_wordmark{font-size:4.6rem;font-weight:900;letter-spacing:.22em;text-indent:.22em;text-align:center;line-height:1;color:var(--c-ink);white-space:nowrap;}
.index_mast-side{font-size:1.15rem;font-weight:500;letter-spacing:.18em;text-transform:uppercase;color:var(--c-text);}
.index_mast-side--left{justify-self:start;}
.index_mast-side--right{justify-self:end;text-align:right;}
.index_mastnav{background:var(--c-paper);border-bottom:3px solid var(--c-rule);}
.index_mastnav-inner{height:var(--nav-h);display:flex;align-items:center;justify-content:space-between;gap:2.4rem;}
.index_mastnav-links{display:flex;gap:3.4rem;}
.index_mastnav-links a{font-size:1.35rem;font-weight:700;letter-spacing:.12em;text-transform:uppercase;color:var(--c-ink);position:relative;padding:.4rem 0;}
.index_mastnav-links a::after{content:'';position:absolute;left:0;bottom:0;width:0;height:2px;background:var(--c-magenta);transition:width .25s;}
.index_mastnav-links a:hover::after{width:100%;}
.index_mastnav-cta{padding:1rem 2.4rem;font-size:1.25rem;}
.index_burger{display:none;flex-direction:column;gap:.7rem;padding:1rem .2rem;}
.index_burger span{width:2.6rem;height:2px;background:var(--c-ink);transition:transform .3s;}
.index_burger.is-open span:first-child{transform:translateY(.45rem) rotate(45deg);}
.index_burger.is-open span:last-child{transform:translateY(-.45rem) rotate(-45deg);}
.index_drawer{display:none;position:fixed;inset:calc(var(--nav-h)) 0 0 0;background:var(--c-paper);z-index:89;padding:4rem 6vw;flex-direction:column;gap:2.6rem;}
.index_drawer.is-open{display:flex;}
.index_drawer a{font-size:2rem;font-weight:700;letter-spacing:.08em;text-transform:uppercase;border-bottom:1px solid var(--c-hair);padding-bottom:2rem;}
.index_drawer a.index_btn{border:1px solid var(--c-ink);padding:1.6rem;justify-content:center;}

/* ---------- 头版 front ---------- */
.index_front{padding:6.5rem 0 7.5rem;}
.index_front-grid{display:grid;grid-template-columns:1.05fr .95fr;gap:6rem;align-items:end;}
.index_front-copy h1{font-size:6rem;font-weight:900;line-height:1.06;letter-spacing:-.012em;}
.index_front-lede{margin-top:3rem;font-size:1.85rem;line-height:1.7;color:var(--c-text);max-width:56rem;}
.index_front-lede::first-letter{font-size:3.2em;font-weight:900;float:left;line-height:.82;padding:.08em .12em 0 0;color:var(--c-ink);}
.index_front-actions{margin-top:3.6rem;display:flex;align-items:center;gap:3.2rem;flex-wrap:wrap;}
.index_front-media{position:relative;}
.index_front-media img{width:100%;height:52rem;object-fit:cover;}
.index_front-media figcaption,
.index_press figcaption,
.index_brief figcaption,
.index_factory-main figcaption{font-size:1.2rem;font-style:italic;color:var(--c-text);padding-top:1rem;border-top:1px solid var(--c-hair);margin-top:1.2rem;}

/* ---------- 数据行情条 ticker ---------- */
.index_ticker{background:var(--c-ink);color:var(--c-paper);}
.index_ticker-row{display:grid;grid-template-columns:repeat(4,1fr);}
.index_ticker-item{padding:2.6rem 2.4rem;display:flex;align-items:baseline;gap:1.4rem;border-left:1px solid rgba(246,243,236,.18);}
.index_ticker-item:first-child{border-left:none;padding-left:0;}
.index_ticker-item strong{font-size:3.2rem;font-weight:900;letter-spacing:-.01em;white-space:nowrap;}
.index_ticker-item span{font-size:1.3rem;color:rgba(246,243,236,.62);line-height:1.4;}

/* ---------- 通用板块与栏目头 ---------- */
.index_sec{padding:9rem 0;}
.index_sec--rule{border-top:3px solid var(--c-rule);background:var(--c-white);}
.index_rulehead{margin-bottom:5.5rem;}
.index_rulehead h2{font-size:3.9rem;font-weight:900;line-height:1.12;letter-spacing:-.01em;}
.index_rulehead p{margin-top:1.8rem;font-size:1.6rem;color:var(--c-text);max-width:62rem;}

/* ---------- 印刷机版面: 2 头条 + 4 简讯 ---------- */
.index_pressgrid{display:grid;grid-template-columns:repeat(4,1fr);gap:0 4rem;}
.index_press{display:flex;flex-direction:column;padding:3rem 0;border-top:1px solid var(--c-hair);transition:opacity .25s;}
.index_press:hover h3{color:var(--c-magenta);}
.index_press--lead{grid-column:span 2;border-top:none;padding-top:0;}
.index_press figure img{width:100%;aspect-ratio:3/2;object-fit:cover;background:#E9E4D8;}
.index_press--lead figure img{aspect-ratio:16/9;}
.index_press-body h3{font-size:2.1rem;font-weight:900;line-height:1.25;margin-top:1.8rem;transition:color .25s;}
.index_press--lead .index_press-body h3{font-size:2.7rem;}
.index_press-body p{margin-top:1rem;font-size:1.45rem;color:var(--c-text);}

/* ---------- 应用: 四纵栏 column-rule ---------- */
.index_columns{display:grid;grid-template-columns:repeat(4,1fr);}
.index_col{padding:0 3.2rem;border-left:1px solid var(--c-hair);}
.index_col:first-child{border-left:none;padding-left:0;}
.index_col:last-child{padding-right:0;}
.index_col figure img{width:100%;aspect-ratio:4/3;object-fit:cover;}
.index_col h3{font-size:1.9rem;font-weight:900;margin-top:2.2rem;}
.index_col p{margin-top:1.2rem;font-size:1.45rem;color:var(--c-text);}

/* ---------- 优势: 左标题右清单 ---------- */
.index_why-grid{display:grid;grid-template-columns:1fr 1.6fr;gap:7rem;align-items:start;}
.index_why-intro .index_rulehead{margin-bottom:3.5rem;}
.index_why-colorbar{width:100%;max-width:34rem;mix-blend-mode:multiply;}
.index_whylist{list-style:none;display:grid;grid-template-columns:1fr 1fr;gap:3.6rem 4.5rem;}
.index_whylist li{border-top:3px solid var(--c-ink);padding-top:1.8rem;}
.index_whylist strong{display:block;font-size:1.8rem;font-weight:900;}
.index_whylist span{display:block;margin-top:.8rem;font-size:1.42rem;color:var(--c-text);}

/* ---------- 流程: 五栏大数字 ---------- */
.index_steps{list-style:none;display:grid;grid-template-columns:repeat(5,1fr);gap:0 3.6rem;counter-reset:step;}
.index_step{border-left:1px solid var(--c-hair);padding-left:2.6rem;}
.index_step:first-child{border-left:none;padding-left:0;}
.index_step-no{font-size:5.6rem;font-weight:900;line-height:1;color:transparent;-webkit-text-stroke:1.5px var(--c-ink);}
.index_step h3{font-size:1.75rem;font-weight:900;margin-top:2rem;}
.index_step p{margin-top:1rem;font-size:1.38rem;color:var(--c-text);}

/* ---------- CTA 油墨横幅 ---------- */
.index_band{background:#121110 url('../images/index_bg_band_dark.webp') center/cover no-repeat;color:var(--c-paper);}
.index_band-inner{padding:7.5rem 0;display:flex;align-items:center;justify-content:space-between;gap:5rem;}
.index_band-title{font-size:3.4rem;font-weight:900;line-height:1.25;max-width:64rem;}
.index_band-sub{margin-top:1.4rem;font-size:1.5rem;color:rgba(246,243,236,.6);}

/* ---------- 案例简报 ---------- */
.index_briefs{display:grid;grid-template-columns:repeat(3,1fr);gap:5rem;}
.index_brief figure img{width:100%;aspect-ratio:3/2;object-fit:cover;}
.index_brief-meta{margin-top:2rem;font-size:1.2rem;font-weight:700;letter-spacing:.14em;text-transform:uppercase;color:var(--c-magenta);}
.index_brief h3{font-size:2.1rem;font-weight:900;margin-top:1rem;line-height:1.3;}
.index_brief > p{margin-top:1rem;font-size:1.45rem;color:var(--c-text);}

/* ---------- 工厂 ---------- */
.index_factory-grid{display:grid;grid-template-columns:1.15fr .85fr;gap:6.5rem;align-items:start;}
.index_factory-media{position:relative;padding-bottom:9rem;}
.index_factory-main img{width:100%;aspect-ratio:4/3;object-fit:cover;}
.index_factory-inset{position:absolute;right:-2rem;bottom:0;width:44%;border:6px solid var(--c-white);box-shadow:0 1.6rem 4rem rgba(26,23,19,.16);}
.index_factory-inset img{width:100%;aspect-ratio:4/3;object-fit:cover;}
.index_factory-copy .index_rulehead{margin-bottom:3rem;}
.index_factory-copy > p{color:var(--c-text);margin-bottom:1.8rem;}
.index_factory-facts{list-style:none;margin:3.4rem 0 3.8rem;display:grid;grid-template-columns:1fr 1fr;gap:2.6rem 3.6rem;}
.index_factory-facts li{border-top:3px solid var(--c-ink);padding-top:1.4rem;}
.index_factory-facts strong{display:block;font-size:2.6rem;font-weight:900;}
.index_factory-facts span{display:block;margin-top:.4rem;font-size:1.32rem;color:var(--c-text);}

/* ---------- press notes: 横排文章列表 ---------- */
.index_notes{display:flex;flex-direction:column;}
.index_note{display:grid;grid-template-columns:26rem 1fr;gap:4rem;align-items:center;padding:3.4rem 0;border-top:1px solid var(--c-hair);}
.index_note:first-child{border-top:none;padding-top:0;}
.index_note figure img{width:100%;aspect-ratio:3/2;object-fit:cover;}
.index_note-body h3{font-size:2.2rem;font-weight:900;line-height:1.3;transition:color .25s;}
.index_note:hover h3{color:var(--c-magenta);}
.index_note-body p{margin-top:1rem;font-size:1.5rem;color:var(--c-text);max-width:78rem;}
.index_note-more{display:inline-flex;align-items:center;gap:.8rem;margin-top:1.6rem;font-size:1.25rem;font-weight:700;letter-spacing:.14em;text-transform:uppercase;color:var(--c-ink);}
.index_note:hover .index_note-more{color:var(--c-magenta);}

/* ---------- FAQ 问答专栏 ---------- */
.index_faq-grid{display:grid;grid-template-columns:1fr 1.7fr;gap:7rem;align-items:start;}
.index_faq-grid .index_rulehead{margin-bottom:0;position:sticky;top:calc(var(--nav-h) + 3rem);}
.index_faqlist details{border-top:1px solid var(--c-hair);}
.index_faqlist details:last-child{border-bottom:1px solid var(--c-hair);}
.index_faqlist summary{list-style:none;display:flex;align-items:center;justify-content:space-between;gap:2.4rem;padding:2.4rem 0;cursor:pointer;}
.index_faqlist summary::-webkit-details-marker{display:none;}
.index_faqlist summary h3{font-size:1.85rem;font-weight:700;line-height:1.4;}
.index_faqlist summary h3::before{content:'Q.';font-weight:900;color:var(--c-magenta);margin-right:1.2rem;}
.index_faqlist summary i{flex:none;font-size:1.8rem;transition:transform .3s;}
.index_faqlist details[open] summary i{transform:rotate(45deg);}
.index_faqlist details p{padding:0 0 2.6rem;font-size:1.5rem;color:var(--c-text);max-width:72rem;}

/* ---------- 询盘 ---------- */
.index_contact{padding:9rem 0 10rem;border-top:3px solid var(--c-rule);background:var(--c-white);}
.index_contact-grid{display:grid;grid-template-columns:1fr 1.25fr;gap:8rem;align-items:start;}
.index_contact-copy h2{font-size:3.9rem;font-weight:900;line-height:1.12;}
.index_contact-copy > p{margin-top:2rem;color:var(--c-text);}
.index_contact-list{list-style:none;margin-top:3.4rem;display:flex;flex-direction:column;gap:1.6rem;}
.index_contact-list li{display:flex;align-items:center;gap:1.4rem;font-size:1.6rem;font-weight:500;}
.index_contact-list i{font-size:2rem;color:var(--c-magenta);}
.index_contact-colorbar{margin-top:4.5rem;width:100%;max-width:36rem;mix-blend-mode:multiply;}
.index_form{display:flex;flex-direction:column;gap:2.2rem;border:1px solid var(--c-ink);padding:4rem;background:var(--c-paper);}
.index_form-row{display:grid;grid-template-columns:1fr 1fr;gap:2.2rem;}
.index_form label{display:flex;flex-direction:column;gap:.8rem;font-size:1.25rem;font-weight:700;letter-spacing:.12em;text-transform:uppercase;}
.index_form input,.index_form textarea{font-family:inherit;font-size:1.55rem;color:var(--c-ink);background:var(--c-white);border:1px solid var(--c-hair);padding:1.3rem 1.5rem;transition:border-color .25s;resize:vertical;}
.index_form input::placeholder,.index_form textarea::placeholder{color:#A29B8D;}
.index_form input:focus,.index_form textarea:focus{outline:none;border-color:var(--c-ink);}
.index_form button{margin-top:.6rem;}
.index_form button.is-sent{background:#1F7A43;border-color:#1F7A43;color:#fff;}
.index_form-note{font-size:1.35rem;color:var(--c-text);min-height:1.6em;}

/* ---------- 页脚 ---------- */
.index_footer{background:var(--c-ink);color:var(--c-paper);}
.index_footer-grid{padding:7rem 0 5rem;display:grid;grid-template-columns:1.5fr 1fr 1fr 1fr;gap:5rem;}
.index_wordmark--small{font-size:2.6rem;text-align:left;text-indent:0;color:var(--c-paper);}
.index_footer-brand > p{margin-top:2rem;font-size:1.42rem;color:rgba(246,243,236,.62);max-width:38rem;}
.index_footer-social{margin-top:2.6rem;display:flex;gap:1.2rem;}
.index_footer-social a{width:4rem;height:4rem;border:1px solid rgba(246,243,236,.3);display:grid;place-items:center;font-size:1.7rem;transition:all .25s;}
.index_footer-social a:hover{background:var(--c-magenta);border-color:var(--c-magenta);}
.index_footer-col > p{font-size:1.25rem;font-weight:700;letter-spacing:.16em;text-transform:uppercase;color:rgba(246,243,236,.5);margin-bottom:2rem;padding-bottom:1.2rem;border-bottom:1px solid rgba(246,243,236,.2);}
.index_footer-col a{display:block;font-size:1.45rem;color:rgba(246,243,236,.78);padding:.55rem 0;transition:color .25s;}
.index_footer-col a:hover{color:#fff;}
.index_footer-bar{border-top:1px solid rgba(246,243,236,.18);}
.index_footer-bar-inner{padding:2.2rem 0;display:flex;align-items:center;justify-content:space-between;gap:2rem;font-size:1.25rem;color:rgba(246,243,236,.5);}

/* ---------- 油墨显影入场 ---------- */
.index_reveal{opacity:0;filter:blur(6px);transition:opacity .7s ease,filter .7s ease;}
.index_reveal.is-visible{opacity:1;filter:blur(0);}
@media (prefers-reduced-motion: reduce){
    html{scroll-behavior:auto;}
    .index_reveal{opacity:1;filter:none;transition:none;}
}

/* ---------- 响应式 ---------- */
@media (max-width:1200px){
    .index_front-copy h1{font-size:5rem;}
    .index_pressgrid{gap:0 3rem;}
    .index_why-grid{grid-template-columns:1fr;gap:4.5rem;}
    .index_faq-grid{grid-template-columns:1fr;gap:4rem;}
    .index_faq-grid .index_rulehead{position:static;}
}

@media (max-width:1024px){
    .index_mastnav-links{display:none;}
    .index_mastnav-cta{display:none;}
    .index_burger{display:flex;}
    .index_front-grid{grid-template-columns:1fr;gap:4.5rem;}
    .index_front-media img{height:auto;aspect-ratio:16/10;}
    .index_ticker-row{grid-template-columns:1fr 1fr;}
    .index_ticker-item{border-left:none;padding-left:0;}
    .index_pressgrid{grid-template-columns:1fr 1fr;}
    .index_press--lead{grid-column:span 2;}
    .index_press{border-top:1px solid var(--c-hair);padding:2.6rem 0;}
    .index_columns{grid-template-columns:1fr 1fr;gap:4rem 0;}
    .index_col{padding:0 3rem;}
    .index_col:nth-child(odd){border-left:none;padding-left:0;}
    .index_col:nth-child(even){padding-right:0;}
    .index_steps{grid-template-columns:1fr;gap:3.2rem;}
    .index_step{border-left:none;padding-left:0;border-top:1px solid var(--c-hair);padding-top:2.6rem;}
    .index_step:first-child{border-top:none;padding-top:0;}
    .index_factory-grid{grid-template-columns:1fr;gap:5rem;}
    .index_contact-grid{grid-template-columns:1fr;gap:5rem;}
    .index_footer-grid{grid-template-columns:1fr 1fr;gap:4rem;}
}

@media (max-width:768px){
    .index_page{width:calc(100% - 4.8rem);}
    :root{--nav-h:6.4rem;}
    html{font-size:9px;}
    .index_mast{position:static;}
    .index_mast-brand{grid-template-columns:1fr;padding:2.2rem 0 1.8rem;}
    .index_mast-side{display:none;}
    .index_wordmark{font-size:3.6rem;}
    .index_drawer{inset:auto 0 auto 0;position:fixed;top:0;bottom:0;padding-top:10rem;}
    .index_front{padding:5rem 0 6rem;}
    .index_front-copy h1{font-size:3.9rem;}
    .index_front-lede{font-size:1.7rem;}
    .index_sec{padding:6.5rem 0;}
    .index_rulehead h2{font-size:3rem;}
    .index_pressgrid{grid-template-columns:1fr;}
    .index_press--lead{grid-column:span 1;}
    .index_press--lead .index_press-body h3{font-size:2.2rem;}
    .index_columns{grid-template-columns:1fr;gap:3.6rem 0;}
    .index_col{padding:0;border-left:none;}
    .index_whylist{grid-template-columns:1fr;gap:2.8rem;}
    .index_band-inner{flex-direction:column;align-items:flex-start;padding:6rem 0;}
    .index_band-title{font-size:2.7rem;}
    .index_briefs{grid-template-columns:1fr;gap:4rem;}
    .index_factory-media{padding-bottom:0;}
    .index_factory-inset{display:none;}
    .index_factory-facts{grid-template-columns:1fr 1fr;gap:2.2rem;}
    .index_note{grid-template-columns:1fr;gap:2rem;padding:3rem 0;}
    .index_note figure{max-width:100%;}
    .index_form{padding:2.8rem 2.2rem;}
    .index_form-row{grid-template-columns:1fr;}
    .index_footer-grid{grid-template-columns:1fr;gap:3.6rem;padding:5.5rem 0 4rem;}
    .index_footer-bar-inner{flex-direction:column;align-items:flex-start;gap:.6rem;}
}

@media (max-width:480px){
    .index_page{width:calc(100% - 3.6rem);}
    .index_wordmark{font-size:2.9rem;letter-spacing:.16em;text-indent:.16em;}
    .index_front-copy h1{font-size:3.3rem;}
    .index_ticker-row{grid-template-columns:1fr;}
    .index_ticker-item{padding:1.8rem 0;border-bottom:1px solid rgba(246,243,236,.14);}
    .index_ticker-item:last-child{border-bottom:none;}
    .index_ticker-item strong{font-size:2.6rem;}
    .index_rulehead h2{font-size:2.6rem;}
    .index_btn{width:100%;}
    .index_front-actions .index_btn{width:auto;}
}