/* ============================================================
   南京景山智能科技有限公司 · 计算机视觉官网
   科技锐利 · 玫红/绯红强调 (rose/crimson) + 墨黑石墨
   ============================================================ */

:root{
    --rose:#e11d48;
    --rose-deep:#be123c;
    --rose-soft:rgba(225,29,72,.10);
    --rose-line:rgba(225,29,72,.28);

    --ink:#0f172a;
    --ink-2:#334155;
    --ink-3:#64748b;

    --paper:#ffffff;
    --paper-2:#f7f7f8;
    --paper-3:#eef0f3;

    --line:#e4e7ec;

    --graphite:#0f172a;
    --graphite-2:#16223c;
    --on-dark:#e8ecf4;
    --on-dark-dim:#94a3b8;

    --r-sm:10px;
    --r-md:12px;
    --r-lg:14px;

    --bound:1180px;
    --gap-sec:clamp(64px,9vw,116px);

    --shadow:0 16px 44px rgba(15,23,42,.10);
    --shadow-rose:0 14px 38px rgba(225,29,72,.24);
}

*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{
    font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
    color:var(--ink);
    background:var(--paper);
    line-height:1.7;
    -webkit-font-smoothing:antialiased;
}
a{color:inherit;text-decoration:none}
ul,ol{list-style:none}
img,svg{display:block}
em{font-style:normal}
h1,h2,h3,h4{line-height:1.25;letter-spacing:-.01em}

.cap-wrap{max-width:var(--bound);margin:0 auto;padding:0 24px}

/* 进场动画 */
.reveal{opacity:0;transform:translateY(22px);transition:opacity .7s ease,transform .7s ease}
.reveal.in{opacity:1;transform:none}
@media (prefers-reduced-motion:reduce){
    .reveal{opacity:1;transform:none;transition:none}
    *{animation:none !important;scroll-behavior:auto}
}

/* 按钮 */
.detect-btn{
    display:inline-flex;align-items:center;justify-content:center;
    padding:12px 24px;border-radius:var(--r-sm);
    font-size:15px;font-weight:600;cursor:pointer;
    transition:transform .2s ease,box-shadow .2s ease,background .2s ease,color .2s ease;
    border:1.5px solid transparent;white-space:nowrap;
}
.detect-btn-solid{background:var(--rose);color:#fff;box-shadow:var(--shadow-rose)}
.detect-btn-solid:hover{background:var(--rose-deep);transform:translateY(-2px)}
.detect-btn-ghost{background:transparent;color:var(--rose);border-color:var(--rose-line)}
.detect-btn-ghost:hover{background:var(--rose-soft);transform:translateY(-2px)}

/* ---------- 顶部导航 ---------- */
.vision-topbar{
    position:sticky;top:0;z-index:50;
    background:rgba(255,255,255,.82);
    -webkit-backdrop-filter:saturate(160%) blur(14px);
    backdrop-filter:saturate(160%) blur(14px);
    border-bottom:1px solid var(--line);
}
.topbar-inner{display:flex;align-items:center;gap:24px;height:68px}
.brand{display:flex;align-items:center;gap:11px}
.brand-mark{width:34px;height:34px;flex:none}
.brand-mark svg{width:100%;height:100%}
.brand-name{font-size:19px;font-weight:800;letter-spacing:.02em}
.vision-nav{display:flex;gap:30px;margin-left:auto}
.vision-nav a{font-size:15px;font-weight:500;color:var(--ink-2);position:relative;padding:6px 0}
.vision-nav a::after{
    content:"";position:absolute;left:0;right:100%;bottom:0;height:2px;
    background:var(--rose);transition:right .25s ease;
}
.vision-nav a:hover{color:var(--ink)}
.vision-nav a:hover::after{right:0}
.topbar-cta{margin-left:6px}
.nav-burger{
    display:none;flex-direction:column;gap:5px;width:42px;height:42px;
    align-items:center;justify-content:center;background:none;border:none;cursor:pointer;
    margin-left:auto;
}
.nav-burger span{width:22px;height:2px;background:var(--ink);border-radius:2px;transition:.25s}
.nav-burger[aria-expanded="true"] span:nth-child(1){transform:translateY(7px) rotate(45deg)}
.nav-burger[aria-expanded="true"] span:nth-child(2){opacity:0}
.nav-burger[aria-expanded="true"] span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}

.drawer{
    flex-direction:column;gap:4px;padding:14px 24px 22px;
    border-top:1px solid var(--line);background:var(--paper);
}
.drawer:not([hidden]){display:flex}
.drawer a{padding:12px 6px;font-size:16px;font-weight:500;color:var(--ink-2);border-bottom:1px solid var(--paper-3)}
.drawer a.detect-btn{border:1.5px solid transparent;justify-content:center;margin-top:12px;color:#fff}

/* ---------- Hero ---------- */
.vision-hero{
    background:
        radial-gradient(900px 420px at 78% -8%,var(--rose-soft),transparent 60%),
        linear-gradient(180deg,var(--paper) 0%,var(--paper-2) 100%);
    padding:clamp(52px,8vw,96px) 0 var(--gap-sec);
    overflow:hidden;
}
.hero-grid{display:grid;grid-template-columns:1.05fr .95fr;gap:clamp(32px,5vw,64px);align-items:center}
.hero-eyebrow{
    display:inline-block;font-size:13px;font-weight:700;letter-spacing:.08em;
    color:var(--rose);background:var(--rose-soft);border:1px solid var(--rose-line);
    padding:6px 14px;border-radius:999px;margin-bottom:22px;
}
.hero-title{font-size:clamp(32px,5vw,52px);font-weight:800;color:var(--ink)}
.hero-title em{color:var(--rose)}
.hero-sub{margin:22px 0 30px;font-size:clamp(15px,1.6vw,18px);color:var(--ink-2);max-width:36em}
.hero-actions{display:flex;gap:14px;flex-wrap:wrap}
.hero-tags{display:flex;flex-wrap:wrap;gap:10px;margin-top:30px}
.hero-tags li{
    font-size:13px;font-weight:600;color:var(--ink-2);
    padding:6px 13px;background:var(--paper);border:1px solid var(--line);border-radius:999px;
}
.hero-tags li::before{content:"";display:inline-block;width:6px;height:6px;border-radius:2px;background:var(--rose);margin-right:7px;vertical-align:middle}

/* 视觉识别演示 */
.hero-scan{display:flex;justify-content:center}
.scan-frame{
    position:relative;width:100%;max-width:460px;aspect-ratio:4/3;
    border-radius:var(--r-lg);overflow:hidden;
    box-shadow:0 26px 60px rgba(15,23,42,.28);
    border:1px solid rgba(225,29,72,.25);
    background:#0f172a;
}
.scan-scene{position:absolute;inset:0;width:100%;height:100%}
.scan-corner{position:absolute;width:22px;height:22px;border:2px solid var(--rose);z-index:4}
.scan-corner.tl{top:12px;left:12px;border-right:none;border-bottom:none;border-radius:4px 0 0 0}
.scan-corner.tr{top:12px;right:12px;border-left:none;border-bottom:none;border-radius:0 4px 0 0}
.scan-corner.bl{bottom:12px;left:12px;border-right:none;border-top:none;border-radius:0 0 0 4px}
.scan-corner.br{bottom:12px;right:12px;border-left:none;border-top:none;border-radius:0 0 4px 0}

.det-box{
    position:absolute;z-index:3;
    border:2px solid var(--rose);border-radius:4px;
    box-shadow:0 0 0 1px rgba(225,29,72,.25),inset 0 0 22px rgba(225,29,72,.12);
    animation:detpulse 2.6s ease-in-out infinite;
}
.det-box-2{border-color:#fb7185;animation-delay:.5s}
.det-box-3{border-color:var(--rose);animation-delay:1s}
.det-box-4{border-color:#fda4af;animation-delay:1.5s}
.det-label{
    position:absolute;top:-22px;left:-2px;
    font-size:11px;font-weight:700;color:#fff;
    background:var(--rose);padding:2px 8px;border-radius:4px 4px 4px 0;
    white-space:nowrap;letter-spacing:.02em;
}
.det-box-2 .det-label{background:#fb7185}
.det-box-4 .det-label{background:#e11d48}
@keyframes detpulse{0%,100%{opacity:.9}50%{opacity:.45}}

.scan-line{
    position:absolute;left:0;right:0;top:0;height:2px;z-index:5;
    background:linear-gradient(90deg,transparent,var(--rose) 20%,#fff 50%,var(--rose) 80%,transparent);
    box-shadow:0 0 14px 2px rgba(225,29,72,.7);
    animation:scanmove 3.4s ease-in-out infinite;
}
@keyframes scanmove{0%{top:2%}50%{top:96%}100%{top:2%}}

.scan-badge{
    position:absolute;bottom:16px;right:16px;z-index:6;
    font-size:11px;font-weight:700;letter-spacing:.03em;color:#fff;
    background:rgba(15,23,42,.7);border:1px solid var(--rose-line);
    padding:4px 10px;border-radius:6px;
    -webkit-backdrop-filter:blur(4px);backdrop-filter:blur(4px);
}

/* ---------- 通用区块头 ---------- */
.block-head{max-width:640px;margin:0 auto clamp(38px,5vw,58px);text-align:center}
.block-tag{
    display:inline-block;font-size:12px;font-weight:800;letter-spacing:.16em;
    color:var(--rose);margin-bottom:14px;
}
.block-head h2{font-size:clamp(26px,3.4vw,38px);font-weight:800}
.block-head p{margin-top:14px;color:var(--ink-3);font-size:16px}

section[id]{scroll-margin-top:84px}

/* ---------- 核心能力 ---------- */
.cap-block{padding:var(--gap-sec) 0;background:var(--paper)}
.cap-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.cap-card{
    background:var(--paper);border:1px solid var(--line);border-radius:var(--r-md);
    padding:30px 26px;transition:transform .25s ease,box-shadow .25s ease,border-color .25s ease;
    position:relative;overflow:hidden;
}
.cap-card::before{
    content:"";position:absolute;left:0;top:0;width:100%;height:3px;
    background:var(--rose);transform:scaleX(0);transform-origin:left;transition:transform .3s ease;
}
.cap-card:hover{transform:translateY(-6px);box-shadow:var(--shadow);border-color:var(--rose-line)}
.cap-card:hover::before{transform:scaleX(1)}
.cap-ico{
    display:inline-flex;width:52px;height:52px;border-radius:var(--r-sm);
    align-items:center;justify-content:center;color:var(--rose);
    background:var(--rose-soft);margin-bottom:18px;
}
.cap-ico svg{width:30px;height:30px}
.cap-card h3{font-size:19px;font-weight:700;margin-bottom:10px}
.cap-card p{color:var(--ink-2);font-size:15px}
.cap-card-cta{
    background:linear-gradient(150deg,var(--graphite),var(--graphite-2));
    color:var(--on-dark);border-color:transparent;
    display:flex;flex-direction:column;align-items:flex-start;justify-content:center;gap:14px;
}
.cap-card-cta::before{display:none}
.cap-card-cta h3{color:#fff}
.cap-card-cta p{color:var(--on-dark-dim)}
.cap-card-cta:hover{transform:translateY(-6px)}

/* ---------- 技术优势 ---------- */
.edge-block{padding:var(--gap-sec) 0;background:var(--paper-2)}
.edge-grid{display:grid;grid-template-columns:repeat(5,1fr);gap:18px}
.edge-card{
    background:var(--paper);border:1px solid var(--line);border-radius:var(--r-md);
    padding:26px 22px;transition:transform .25s ease,box-shadow .25s ease;
}
.edge-card:hover{transform:translateY(-5px);box-shadow:var(--shadow)}
.edge-num{
    display:block;font-size:26px;font-weight:800;color:var(--rose);
    margin-bottom:12px;letter-spacing:-.02em;
}
.edge-card h3{font-size:16px;font-weight:700;margin-bottom:8px}
.edge-card p{font-size:13.5px;color:var(--ink-3);line-height:1.65}

/* ---------- 应用场景 ---------- */
.scene-block{padding:var(--gap-sec) 0;background:var(--paper)}
.scene-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.scene-card{
    position:relative;padding:30px 26px 30px 30px;
    background:var(--paper);border:1px solid var(--line);border-radius:var(--r-md);
    border-left:3px solid var(--rose);
    transition:transform .25s ease,box-shadow .25s ease,background .25s ease;
}
.scene-card:hover{transform:translateX(4px);box-shadow:var(--shadow)}
.scene-tag{
    display:block;font-size:14px;font-weight:800;color:var(--rose);
    letter-spacing:.1em;margin-bottom:12px;
}
.scene-card h3{font-size:19px;font-weight:700;margin-bottom:10px}
.scene-card p{color:var(--ink-2);font-size:15px}

/* ---------- 推理流程 ---------- */
.flow-block{padding:var(--gap-sec) 0;background:var(--graphite);color:var(--on-dark)}
.flow-block .block-head h2{color:#fff}
.flow-block .block-head p{color:var(--on-dark-dim)}
.flow-track{display:grid;grid-template-columns:repeat(5,1fr);gap:16px;position:relative}
.flow-step{
    position:relative;padding:26px 20px;
    background:var(--graphite-2);border:1px solid rgba(148,163,184,.14);border-radius:var(--r-md);
}
.flow-step::after{
    content:"";position:absolute;right:-11px;top:50%;transform:translateY(-50%);
    width:10px;height:10px;border-top:2px solid var(--rose);border-right:2px solid var(--rose);
    transform:translateY(-50%) rotate(45deg);z-index:2;
}
.flow-step:last-child::after{display:none}
.flow-idx{
    display:inline-block;font-size:13px;font-weight:800;color:#fff;
    background:var(--rose);width:34px;height:34px;line-height:34px;text-align:center;
    border-radius:9px;margin-bottom:14px;
}
.flow-step h3{font-size:17px;font-weight:700;color:#fff;margin-bottom:8px}
.flow-step p{font-size:13.5px;color:var(--on-dark-dim);line-height:1.6}

/* ---------- 数据统计横幅 ---------- */
.stat-banner{
    background:linear-gradient(120deg,var(--rose) 0%,var(--rose-deep) 100%);
    padding:clamp(48px,6vw,72px) 0;
}
.stat-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:24px;text-align:center}
.stat-num{
    display:block;font-size:clamp(32px,4.5vw,52px);font-weight:800;color:#fff;
    letter-spacing:-.02em;line-height:1.1;
}
.stat-label{display:block;margin-top:10px;font-size:15px;color:rgba(255,255,255,.86);font-weight:500}

/* ---------- 关于景山 ---------- */
.about-block{padding:var(--gap-sec) 0;background:var(--paper)}
.about-grid{display:grid;grid-template-columns:1.35fr .65fr;gap:clamp(32px,5vw,60px);align-items:center}
.about-copy h2{font-size:clamp(26px,3.4vw,38px);font-weight:800;margin-bottom:20px}
.about-copy p{color:var(--ink-2);font-size:16px;margin-bottom:16px}
.about-facts{display:grid;gap:14px}
.about-facts li{
    background:var(--paper-2);border:1px solid var(--line);border-radius:var(--r-md);
    padding:18px 20px;border-left:3px solid var(--rose);
}
.about-facts strong{display:block;font-size:16px;font-weight:700;color:var(--ink)}
.about-facts span{font-size:13.5px;color:var(--ink-3)}

/* ---------- 联系我们 ---------- */
.contact-block{padding:var(--gap-sec) 0;background:var(--paper-2)}
.contact-card{
    display:grid;grid-template-columns:.8fr 1.2fr;gap:clamp(32px,5vw,56px);align-items:center;
    background:var(--paper);border:1px solid var(--line);border-radius:var(--r-lg);
    padding:clamp(34px,4vw,52px);box-shadow:var(--shadow);
}
.contact-copy h2{font-size:clamp(24px,3vw,34px);font-weight:800;margin-bottom:14px}
.contact-copy p{color:var(--ink-2);font-size:15.5px}
.contact-list{display:grid;gap:16px}
.contact-list li{display:grid;grid-template-columns:96px 1fr;gap:16px;align-items:baseline;padding-bottom:14px;border-bottom:1px solid var(--line)}
.contact-list li:last-child{border-bottom:none;padding-bottom:0}
.contact-k{font-size:13px;font-weight:700;color:var(--rose)}
.contact-v{font-size:15.5px;color:var(--ink);font-weight:500}
.contact-v a{color:var(--ink);border-bottom:1px solid var(--rose-line);transition:color .2s}
.contact-v a:hover{color:var(--rose)}

/* ---------- 页脚 ---------- */
.vision-footer{background:var(--graphite);color:var(--on-dark);padding:clamp(48px,6vw,72px) 0 30px}
.footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1fr;gap:36px}
.footer-brand .brand-name{color:#fff}
.footer-brand p{margin-top:16px;color:var(--on-dark-dim);font-size:14px;max-width:24em}
.footer-col h4{font-size:14px;font-weight:700;color:#fff;margin-bottom:16px}
.footer-col a{display:block;color:var(--on-dark-dim);font-size:14px;padding:5px 0;transition:color .2s}
.footer-col a:hover{color:var(--rose)}
.footer-bottom{
    margin-top:38px;padding-top:24px;border-top:1px solid rgba(148,163,184,.16);
    display:flex;justify-content:space-between;flex-wrap:wrap;gap:10px;
    font-size:13px;color:var(--on-dark-dim);
}
.footer-bottom a{color:var(--on-dark-dim);transition:color .2s}
.footer-bottom a:hover{color:var(--rose)}

/* ---------- 响应式 ---------- */
@media (max-width:980px){
    .hero-grid{grid-template-columns:1fr;text-align:left}
    .hero-scan{order:-1}
    .scan-frame{max-width:520px}
    .cap-grid,.scene-grid{grid-template-columns:repeat(2,1fr)}
    .edge-grid{grid-template-columns:repeat(3,1fr)}
    .flow-track{grid-template-columns:repeat(2,1fr)}
    .flow-step::after{display:none}
    .about-grid{grid-template-columns:1fr}
    .contact-card{grid-template-columns:1fr}
    .stat-grid{grid-template-columns:repeat(2,1fr);gap:36px 24px}
    .footer-grid{grid-template-columns:1fr 1fr}
}
@media (max-width:640px){
    .vision-nav,.topbar-cta{display:none}
    .nav-burger{display:flex}
    .cap-grid,.scene-grid,.edge-grid,.flow-track{grid-template-columns:1fr}
    .footer-grid{grid-template-columns:1fr 1fr;gap:26px}
    .footer-brand{grid-column:1/-1}
    .contact-list li{grid-template-columns:1fr;gap:4px}
    .footer-bottom{flex-direction:column;text-align:left}
}