/* ============================================================
   数算寰宇 · 页面组件 CSS
   ============================================================ */

/* ---------- 首页 HERO ---------- */
.hero{
  position:relative;overflow:hidden;
  padding:calc(var(--header-h) + clamp(64px,11vh,120px)) 0 0;
  background:linear-gradient(155deg,#0A1C33 0%,var(--deep) 45%,var(--deep-2) 100%);
  color:var(--paper);
}
.hero::before{
  content:"";position:absolute;inset:0;
  background:
    radial-gradient(ellipse 55% 45% at 78% 22%,rgba(25,195,177,.13),transparent 65%),
    radial-gradient(ellipse 40% 35% at 15% 80%,rgba(25,195,177,.07),transparent 60%);
}
#hero-canvas{position:absolute;inset:0;width:100%;height:100%}
.hero .wrap{position:relative;z-index:2}
.hero-grid{display:grid;grid-template-columns:1.05fr .95fr;gap:clamp(32px,5vw,72px);align-items:center}
.hero-badge{
  display:inline-flex;align-items:center;gap:10px;padding:7px 16px;border-radius:999px;
  border:1px solid rgba(25,195,177,.35);background:rgba(25,195,177,.08);
  font-size:13px;font-weight:600;letter-spacing:.08em;color:var(--teal);margin-bottom:26px;
}
.hero-badge i{width:7px;height:7px;border-radius:50%;background:var(--teal);animation:blink 1.6s infinite}
@keyframes blink{50%{opacity:.35}}
.hero h1{font-size:clamp(32px,4.2vw,50px);font-weight:600;line-height:1.18;letter-spacing:.01em}
.hero h1 em{font-style:normal;color:var(--teal);font-size:clamp(15px,2vw,22px);font-weight:500;letter-spacing:.06em}
.hero .hero-sub{margin-top:20px;max-width:520px;font-size:clamp(15px,1.4vw,17.5px);color:rgba(245,248,250,.72)}
.hero-cta{margin-top:34px;display:flex;gap:14px;flex-wrap:wrap}
.hero-side{position:relative}
.hero-visual{
  border:1px solid var(--line-light);border-radius:var(--r-lg);background:rgba(255,255,255,.03);
  backdrop-filter:blur(4px);overflow:hidden;
}
.hero-visual .hv-top{
  display:flex;justify-content:space-between;align-items:center;
  padding:13px 18px;border-bottom:1px solid var(--line-light);
  font-family:var(--font-num);font-size:12px;letter-spacing:.2em;color:rgba(245,248,250,.5);
}
.hero-visual .hv-top .st{display:flex;gap:8px;align-items:center;color:var(--teal)}
.hero-visual .hv-top .st i{width:6px;height:6px;border-radius:50%;background:var(--teal);animation:blink 1.4s infinite}
.hv-body{padding:20px 18px 22px}
.hv-row{display:flex;justify-content:space-between;align-items:baseline;padding:11px 0;border-bottom:1px dashed rgba(245,248,250,.1)}
.hv-row:last-child{border-bottom:0}
.hv-row .k{font-size:13px;color:rgba(245,248,250,.55)}
.hv-row .v{font-family:var(--font-num);font-size:19px;font-weight:600;color:var(--paper);letter-spacing:.03em}
.hv-row .v.hl{color:var(--teal)}
.hv-bar{height:5px;border-radius:3px;background:rgba(245,248,250,.1);margin-top:6px;overflow:hidden}
.hv-bar i{display:block;height:100%;border-radius:3px;background:linear-gradient(90deg,var(--teal),#7fe8dc);animation:barGrow 2.2s .4s both cubic-bezier(.2,.8,.2,1)}
@keyframes barGrow{from{width:0}}
.hero-metrics{
  margin-top:clamp(44px,7vh,72px);padding-top:30px;border-top:1px solid var(--line-light);
  display:grid;grid-template-columns:repeat(4,1fr);gap:20px;
}
.hero-metrics .hm{padding-left:18px;border-left:2px solid rgba(25,195,177,.4)}
.hero-metrics .stat-num{color:var(--paper)}
.hero-metrics .stat-num b{color:var(--teal);font-weight:600}
.hero-metrics .stat-label{color:rgba(245,248,250,.55)}

/* ---------- 全栈自研链路 ---------- */
.chain{display:flex;align-items:stretch;gap:0;flex-wrap:wrap}
.chain-node{
  flex:1;min-width:140px;padding:22px 18px 20px;position:relative;
  border:1px solid var(--line);background:var(--white);margin:-0.5px;
}
.chain-node .cn-no{font-family:var(--font-num);font-size:12px;letter-spacing:.2em;color:var(--ink-3)}
.chain-node h4{font-size:17px;font-weight:600;margin-top:6px}
.chain-node p{font-size:12.5px;color:var(--ink-2);margin-top:6px;line-height:1.6}
.chain-node::after{
  content:"→";position:absolute;right:-11px;top:50%;transform:translateY(-50%);z-index:2;
  width:22px;height:22px;border-radius:50%;background:var(--deep);color:var(--teal);
  display:flex;align-items:center;justify-content:center;font-size:12px;
}
.chain-node:last-child::after{display:none}
.chain-node.hl{background:var(--deep);color:var(--paper);border-color:var(--deep)}
.chain-node.hl h4{color:var(--paper)}
.chain-node.hl p{color:rgba(245,248,250,.6)}
.chain-node.hl .cn-no{color:var(--teal)}
.chain-note{
  margin-top:18px;display:flex;align-items:center;gap:12px;font-size:13.5px;color:var(--ink-2);
}
.chain-note .chip{
  padding:5px 14px;border-radius:999px;font-size:12.5px;font-weight:600;
  background:var(--teal-dim);color:#0f9e8d;border:1px solid rgba(25,195,177,.35);
}

/* ---------- 四大技术引擎 ---------- */
.tech-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:18px}
.tech-card{padding:26px 24px 24px;display:flex;flex-direction:column}
.tech-card .tc-tag{
  align-self:flex-start;font-family:var(--font-num);font-size:12px;font-weight:600;letter-spacing:.22em;
  color:var(--teal);background:var(--teal-dim);padding:4px 12px;border-radius:var(--r);margin-bottom:18px;
}
.tech-card h3{font-size:19px;font-weight:600;line-height:1.4}
.tech-card p{font-size:13.5px;color:var(--ink-2);margin-top:10px;flex:1}
.tech-card .tc-stats{margin-top:20px;padding-top:16px;border-top:1px solid var(--line);display:flex;flex-direction:column;gap:8px}
.tech-card .tc-stat{display:flex;align-items:baseline;gap:10px}
.tech-card .tc-stat b{font-family:var(--font-num);font-size:24px;font-weight:600;color:var(--deep)}
.tech-card .tc-stat span{font-size:12.5px;color:var(--ink-2)}

/* ---------- 产品矩阵 ---------- */
.prod-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:18px}
.prod-card{display:flex;flex-direction:column;overflow:hidden}
.prod-card .ph-img{aspect-ratio:16/10}
.prod-body{padding:22px 22px 24px;display:flex;flex-direction:column;flex:1}
.prod-cat{font-size:12px;font-weight:600;letter-spacing:.14em;color:var(--teal);margin-bottom:8px}
.prod-card h3{font-size:18.5px;font-weight:600;line-height:1.4}
.prod-card .prod-sum{font-size:13.5px;color:var(--ink-2);margin-top:9px;flex:1}
.prod-specs{margin-top:18px;display:grid;grid-template-columns:1fr 1fr;gap:8px}
.prod-specs span{
  font-size:12.5px;padding:7px 10px;border:1px solid var(--line);border-radius:var(--r);
  color:var(--ink);background:var(--paper);white-space:nowrap;overflow:hidden;text-overflow:ellipsis;
}
.prod-link{margin-top:18px;display:inline-flex;align-items:center;gap:8px;font-size:14px;font-weight:600;color:var(--deep)}
.prod-link:hover{color:var(--teal);gap:12px}
.prod-card.featured{grid-column:span 2;grid-row:span 1}
.prod-card.featured .ph-img{aspect-ratio:21/10}
.prod-card.featured .prod-body{display:grid;grid-template-columns:1.1fr .9fr;gap:8px 24px;align-items:center}
.prod-card.featured .prod-specs{grid-column:1/-1;grid-template-columns:repeat(4,1fr);margin-top:6px}
@media (max-width:1080px){
  .prod-grid{grid-template-columns:repeat(2,1fr)}
  .prod-card.featured{grid-column:span 2}
  .prod-card.featured .prod-body{display:flex;flex-direction:column}
  .prod-card.featured .prod-specs{grid-template-columns:repeat(2,1fr)}
}
@media (max-width:560px){.prod-grid{grid-template-columns:1fr}.prod-card.featured{grid-column:span 1}}

/* ---------- 平台能力 ---------- */
.plat-grid{display:grid;grid-template-columns:1fr 320px;gap:clamp(28px,4vw,56px);align-items:start}
.plat-feats{display:grid;grid-template-columns:repeat(3,1fr);gap:12px}
.plat-feat{
  padding:16px 16px 15px;border:1px solid var(--line);border-radius:var(--r-lg);background:var(--white);
  transition:border-color .25s,transform .25s;
}
.plat-feat:hover{border-color:rgba(25,195,177,.45);transform:translateY(-3px)}
.plat-feat b{font-size:14.5px;font-weight:600;display:block;color:var(--ink)}
.plat-feat span{font-size:12px;color:var(--ink-2);display:block;margin-top:4px}
.plat-aside{
  background:var(--deep);color:var(--paper);border-radius:var(--r-lg);padding:28px 26px;
  display:flex;flex-direction:column;gap:22px;position:relative;overflow:hidden;
}
.plat-aside::after{
  content:"";position:absolute;right:-70px;bottom:-70px;width:200px;height:200px;border-radius:50%;
  border:1px solid var(--line-light);
}
.plat-aside .pa-num{font-family:var(--font-num);font-size:40px;font-weight:600;color:var(--teal);line-height:1}
.plat-aside .pa-label{font-size:13px;color:rgba(245,248,250,.6);margin-top:4px}
.plat-aside hr{border:0;border-top:1px solid var(--line-light)}
.plat-aside .pa-list{display:flex;flex-direction:column;gap:10px;font-size:13.5px;color:rgba(245,248,250,.75)}
.plat-aside .pa-list i{color:var(--teal);font-style:normal;margin-right:8px}

/* ---------- 案例 ---------- */
.case-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:18px}
.case-card{padding:26px 24px;display:flex;flex-direction:column}
.case-card .cc-no{font-family:var(--font-num);font-size:13px;letter-spacing:.2em;color:var(--teal)}
.case-card h3{font-size:18px;font-weight:600;margin-top:10px;line-height:1.4}
.case-card p{font-size:13.5px;color:var(--ink-2);margin-top:10px;flex:1}
.case-card .cc-tags{margin-top:18px;display:flex;flex-wrap:wrap;gap:7px}
.case-card .cc-tags span{
  font-size:11.5px;padding:4px 10px;border-radius:999px;background:var(--paper);
  border:1px solid var(--line);color:var(--ink-2);
}
.case-card .cc-metric{margin-top:18px;padding-top:14px;border-top:1px solid var(--line)}
.case-card .cc-metric b{font-family:var(--font-num);font-size:28px;font-weight:600;color:var(--deep);display:block;line-height:1.1}
.case-card .cc-metric span{font-size:12px;color:var(--ink-3)}
@media (max-width:960px){.case-grid{grid-template-columns:repeat(2,1fr)}}
@media (max-width:520px){.case-grid{grid-template-columns:1fr}}

/* ---------- CTA 条 ---------- */
.cta-band{
  background:linear-gradient(120deg,var(--deep) 0%,var(--deep-2) 100%);
  color:var(--paper);position:relative;overflow:hidden;
}
.cta-band::before{
  content:"";position:absolute;left:-80px;bottom:-140px;width:380px;height:380px;border-radius:50%;
  border:1px solid var(--line-light);
}
.cta-band .wrap{position:relative;display:flex;align-items:center;justify-content:space-between;gap:28px;flex-wrap:wrap;padding-top:clamp(48px,7vh,72px);padding-bottom:clamp(48px,7vh,72px)}
.cta-band h2{font-size:clamp(24px,3vw,36px);font-weight:600;line-height:1.3}
.cta-band h2 em{font-style:normal;color:var(--teal)}
.cta-band p{margin-top:10px;color:rgba(245,248,250,.6);font-size:15px;max-width:560px}
.cta-actions{display:flex;gap:14px;flex-wrap:wrap;flex:none}

/* ---------- 解决方案页 ---------- */
.arch-stack{display:flex;flex-direction:column;gap:10px}
.arch-layer{
  display:grid;grid-template-columns:150px 1fr;gap:20px;align-items:center;
  border:1px solid var(--line);border-radius:var(--r-lg);padding:20px 24px;background:var(--white);
  transition:border-color .3s,box-shadow .3s;
}
.arch-layer:hover,.arch-layer.on{border-color:rgba(25,195,177,.5);box-shadow:var(--shadow)}
.arch-layer .al-tag{display:flex;align-items:center;gap:12px}
.arch-layer .al-tag i{
  width:34px;height:34px;border-radius:var(--r);background:var(--teal-dim);color:#0f9e8d;
  display:flex;align-items:center;justify-content:center;font-family:var(--font-num);font-weight:600;font-size:15px;
}
.arch-layer .al-tag b{font-size:16px;font-weight:600}
.arch-layer .al-tags{display:flex;flex-wrap:wrap;gap:8px}
.arch-layer .al-tags span{
  font-size:13px;font-weight:600;letter-spacing:.02em;
  padding:7px 13px;background:var(--paper);border:1px solid var(--line);
  border-radius:var(--r);color:var(--ink);
}
.arch-layer.top{background:var(--deep);border-color:var(--deep)}
.arch-layer.top .al-tag b{color:var(--paper)}
.arch-layer.top .al-tag i{background:rgba(25,195,177,.18);color:var(--teal)}
.arch-layer.top .al-tags span{background:rgba(255,255,255,.06);border-color:var(--line-light);color:rgba(245,248,250,.7)}

.flow-duo{display:grid;grid-template-columns:1fr 1fr;gap:18px}
.flow-col{border:1px solid var(--line);border-radius:var(--r-lg);padding:26px 26px 22px;background:var(--white)}
.flow-col h4{display:flex;align-items:center;gap:12px;font-size:17px;font-weight:600;margin-bottom:6px}
.flow-col h4 .dir{font-family:var(--font-num);font-size:11px;letter-spacing:.2em;padding:4px 10px;border-radius:999px}
.flow-col.down .dir{background:var(--teal-dim);color:#0f9e8d}
.flow-col.up .dir{background:rgba(242,147,47,.14);color:#b06a1c}
.flow-col p.sub{font-size:13px;color:var(--ink-3);margin-bottom:16px}
.flow-col li{display:flex;gap:10px;padding:10px 0;border-bottom:1px dashed var(--line);font-size:14px;color:var(--ink)}
.flow-col li:last-child{border-bottom:0}
.flow-col li i{font-style:normal;color:var(--teal);flex:none}
.flow-col.up li i{color:var(--orange)}
.flow-mid{
  grid-column:1/-1;text-align:center;padding:14px;border:1px dashed rgba(25,195,177,.4);
  border-radius:var(--r-lg);background:var(--teal-dim);font-size:13.5px;color:#0f9e8d;font-weight:600;
}
.comms-grid{display:grid;grid-template-columns:repeat(5,1fr);gap:12px}
.comms-card{padding:20px 18px;text-align:left}
.comms-card .cm-name{font-family:var(--font-num);font-size:20px;font-weight:600;letter-spacing:.04em}
.comms-card p{font-size:12.5px;color:var(--ink-2);margin-top:8px}
.protocol-strip{display:flex;flex-wrap:wrap;gap:10px;margin-top:22px}
.protocol-strip span{
  font-family:var(--font-num);font-size:13.5px;letter-spacing:.06em;padding:8px 16px;
  border:1px solid var(--line);border-radius:var(--r);background:var(--white);color:var(--ink-2);
}
@media (max-width:900px){.comms-grid{grid-template-columns:repeat(2,1fr)}.flow-duo{grid-template-columns:1fr}.arch-layer{grid-template-columns:1fr;gap:12px}}

/* 安全体系 */
.safety-grid{display:grid;grid-template-columns:repeat(6,1fr);gap:12px}
.safety-item{padding:20px 16px;text-align:center}
.safety-item .sl{font-family:var(--font-num);font-size:12px;letter-spacing:.18em;color:var(--teal)}
.safety-item b{display:block;font-size:15px;margin-top:8px}
.safety-item span{font-size:12px;color:var(--ink-2);display:block;margin-top:6px;line-height:1.55}
@media (max-width:960px){.safety-grid{grid-template-columns:repeat(3,1fr)}}
@media (max-width:560px){.safety-grid{grid-template-columns:repeat(2,1fr)}}

/* 能力列表（自主航行等） */
.cap-duo{display:grid;grid-template-columns:1fr 1fr;gap:18px}
.cap-col{border:1px solid var(--line);border-radius:var(--r-lg);padding:26px;background:var(--white)}
.cap-col h4{font-size:17px;font-weight:600;margin-bottom:14px;display:flex;align-items:center;gap:10px}
.cap-col h4 i{font-style:normal;width:8px;height:8px;border-radius:50%;background:var(--teal)}
.cap-col li{display:flex;justify-content:space-between;gap:14px;padding:11px 0;border-bottom:1px dashed var(--line);font-size:14px}
.cap-col li:last-child{border-bottom:0}
.cap-col li b{font-weight:600}
.cap-col li span{color:var(--ink-2);font-size:13px;text-align:right}
@media (max-width:900px){.cap-duo{grid-template-columns:1fr}}

/* 算法链 */
.algo-chain{display:flex;gap:0;flex-wrap:wrap;margin-top:26px}
.algo-node{flex:1;min-width:130px;padding:16px 14px;border:1px solid var(--line);margin:-0.5px;background:var(--white);text-align:center}
.algo-node b{font-size:14.5px;font-weight:600;display:block}
.algo-node span{font-size:11.5px;color:var(--ink-3);display:block;margin-top:4px}

/* 交付流程 */
.steps{display:grid;grid-template-columns:repeat(4,1fr);gap:14px}
.step{padding:20px 18px;border:1px solid var(--line);border-radius:var(--r-lg);background:var(--white);position:relative}
.step .s-no{font-family:var(--font-num);font-size:26px;font-weight:600;color:rgba(25,195,177,.5)}
.step b{font-size:15px;font-weight:600;display:block;margin-top:6px}
.step span{font-size:12.5px;color:var(--ink-2);display:block;margin-top:5px}
@media (max-width:900px){.steps{grid-template-columns:repeat(2,1fr)}}

/* 产品详情页 */
.pd-spec-wall{display:grid;grid-template-columns:repeat(4,1fr);gap:14px}
.pd-spec{padding:24px 20px;border:1px solid var(--line);border-radius:var(--r-lg);background:var(--white);text-align:left}
.pd-spec b{font-family:var(--font-num);font-size:clamp(30px,3.4vw,44px);font-weight:600;color:var(--deep);line-height:1;display:block}
.pd-spec span{font-size:13px;color:var(--ink-2);display:block;margin-top:8px}
.pd-block{display:grid;grid-template-columns:220px 1fr;gap:clamp(20px,3vw,48px);padding:30px 0;border-top:1px solid var(--line)}
.pd-block:first-of-type{border-top:0}
.pd-block h4{font-size:18px;font-weight:600}
.pd-block h4 small{display:block;font-size:12px;font-weight:400;color:var(--ink-3);margin-top:4px;letter-spacing:.06em}
.pd-block p{font-size:15px;color:var(--ink-2);line-height:1.9}
@media (max-width:900px){.pd-spec-wall{grid-template-columns:repeat(2,1fr)}.pd-block{grid-template-columns:1fr;gap:10px}}

/* 新闻 */
.news-list{display:flex;flex-direction:column;gap:14px}
.news-item{
  display:grid;grid-template-columns:110px 1fr auto;gap:22px;align-items:center;
  padding:22px 26px;border:1px solid var(--line);border-radius:var(--r-lg);background:var(--white);
  transition:border-color .25s,transform .25s;
}
.news-item:hover{border-color:rgba(25,195,177,.45);transform:translateX(6px)}
.news-item .ni-date{font-family:var(--font-num);font-size:15px;color:var(--ink-3);line-height:1.5}
.news-item .ni-date b{display:block;font-size:24px;color:var(--ink);font-weight:600}
.news-item h3{font-size:16.5px;font-weight:600}
.news-item p{font-size:13.5px;color:var(--ink-2);margin-top:5px}
.news-item .ni-cat{font-size:12px;padding:5px 12px;border-radius:999px;background:var(--teal-dim);color:#0f9e8d;font-weight:600;white-space:nowrap}
@media (max-width:700px){.news-item{grid-template-columns:1fr;gap:10px}.news-item .ni-date{display:flex;gap:8px;align-items:baseline}}

/* 联系页 */
.contact-grid{display:grid;grid-template-columns:1fr 1.2fr;gap:clamp(28px,4vw,64px);align-items:start}
.contact-info .ci-row{display:flex;gap:16px;padding:18px 0;border-bottom:1px solid var(--line)}
.contact-info .ci-row:first-child{border-top:1px solid var(--line)}
.contact-info .ci-ic{
  width:42px;height:42px;border-radius:var(--r);background:var(--teal-dim);color:#0f9e8d;
  display:flex;align-items:center;justify-content:center;flex:none;font-size:17px;
}
.contact-info b{font-size:12px;letter-spacing:.16em;color:var(--ink-3);display:block}
.contact-info .ci-val{font-size:16px;font-weight:600;margin-top:3px}
.contact-info .ci-val a:hover{color:var(--teal)}
.form-panel{background:var(--white);border:1px solid var(--line);border-radius:var(--r-lg);padding:clamp(24px,3vw,36px)}
.form-panel h3{font-size:19px;font-weight:600;margin-bottom:4px}
.form-panel .fp-sub{font-size:13.5px;color:var(--ink-3);margin-bottom:22px}
@media (max-width:900px){.contact-grid{grid-template-columns:1fr}}

/* 关于页 */
.about-duo{display:grid;grid-template-columns:1.1fr .9fr;gap:clamp(28px,4vw,64px);align-items:start}
.about-duo .ad-p{font-size:15.5px;color:var(--ink-2);margin-bottom:18px;line-height:1.9}
.about-duo .ad-p.lead{font-size:18px;color:var(--ink);font-weight:500}
.policy-list{display:flex;flex-direction:column}
.policy-item{display:grid;grid-template-columns:92px 1fr;gap:20px;padding:20px 0;border-bottom:1px solid var(--line)}
.policy-item:first-child{border-top:1px solid var(--line)}
.policy-item .py{font-family:var(--font-num);font-size:26px;font-weight:600;color:var(--teal);line-height:1.2}
.policy-item b{font-size:15px;font-weight:600;display:block}
.policy-item span{font-size:13px;color:var(--ink-2);display:block;margin-top:4px}
@media (max-width:900px){.about-duo{grid-template-columns:1fr}}

/* 通用列表页 hero 内指标 */
.m-4{display:grid;grid-template-columns:repeat(4,1fr);gap:14px}
@media (max-width:700px){.m-4{grid-template-columns:repeat(2,1fr)}}

/* ============================================================
   移动端适配补丁（≤960 / ≤600）
   ============================================================ */
@media (max-width:960px){
  /* 首页主视觉：单列（标题在前） */
  .hero-grid{grid-template-columns:1fr;gap:36px}
  .hero .hero-sub{max-width:none}
  /* 指标 4→2 */
  .hero-metrics{grid-template-columns:repeat(2,1fr);gap:16px}
  /* 技术引擎 4→2 */
  .tech-grid{grid-template-columns:repeat(2,1fr)}
  /* 平台能力：单列 */
  .plat-grid{grid-template-columns:1fr;gap:28px}
  .plat-aside{padding:24px 22px}
  /* 通信 5→3 */
  .comms-grid{grid-template-columns:repeat(3,1fr)}
  /* 交付流程 4→2 已在 900 断点；补充 */
  .steps{grid-template-columns:repeat(2,1fr)}
}

@media (max-width:600px){
  /* 指标 2→1 保持 2，缩小间距 */
  .hero-metrics{gap:14px}
  .hero-metrics .hm{padding-left:12px}
  /* 技术卡 2→1 */
  .tech-grid{grid-template-columns:1fr}
  /* 平台特性 3→1 */
  .plat-feats{grid-template-columns:1fr}
  /* 通信 3→2 */
  .comms-grid{grid-template-columns:repeat(2,1fr)}
  /* 交付流程 2→1 */
  .steps{grid-template-columns:1fr}
  /* 全栈链路节点：去掉箭头、纵向堆叠 */
  .chain-node{min-width:100%}
  .chain-node::after{display:none}
  .algo-node{min-width:calc(50% - 14px)}
  /* 产品规格 2→1 */
  .prod-specs{grid-template-columns:1fr}
  .prod-card.featured .prod-specs{grid-template-columns:repeat(2,1fr)}
  /* 产品详情规格墙 2→1 */
  .pd-spec-wall{grid-template-columns:repeat(2,1fr)}
  .pd-spec b{font-size:26px}
  /* 架构层标签更紧凑 */
  .arch-layer{padding:18px 18px}
  .arch-layer .al-tag i{width:30px;height:30px}
  /* 能力列表 */
  .cap-col li{flex-direction:column;align-items:flex-start;gap:4px}
  .cap-col li span{text-align:left}
  /* 联系信息行 */
  .contact-info .ci-row{flex-direction:row}
  /* 新闻条目 */
  .news-item{padding:18px 18px}
  .news-item .ni-date b{font-size:20px}
}

/* 案例页：主案例卡（智慧港口） */
.case-featured{margin-bottom:22px;padding:clamp(28px,4vw,48px)}
.cf-grid{display:grid;grid-template-columns:1fr auto;gap:28px;align-items:start}
.cf-chips{display:flex;gap:10px;flex-wrap:wrap;margin-top:22px}
.cf-chips span{
  font-size:12.5px;font-weight:500;padding:6px 14px;border:1px solid var(--line-light);
  border-radius:999px;color:rgba(245,248,250,.82);
}
.cf-metrics{display:grid;grid-template-columns:repeat(2,1fr);gap:12px;min-width:280px}
.cf-m{padding:18px 20px}
.cf-m .num{font-size:clamp(26px,3vw,34px);line-height:1;display:block}
.cf-m-l{font-size:12px;color:rgba(245,248,250,.55);margin-top:6px}
@media (max-width:820px){
  .cf-grid{grid-template-columns:1fr;gap:26px}
  .cf-metrics{min-width:0;grid-template-columns:repeat(2,1fr)}
}
@media (max-width:480px){
  .case-featured{padding:26px 18px}
  .cf-metrics{grid-template-columns:repeat(2,1fr);gap:10px}
  .cf-m{padding:15px 14px}
  .cf-chips span{font-size:11.5px;padding:5px 11px}
}

/* 案例页其余卡片响应式 */
@media (max-width:900px){
  .case-card{padding:24px 20px}
}
@media (max-width:640px){
  .case-card{padding:22px 18px}
  .case-card .cc-metric b{font-size:22px}
  .case-card .cc-tags span{font-size:11px;padding:4px 8px}
}