/* ============================================================
   思壮智能 官网样式
   Design System: Industrial B2B, Clean, Trustworthy
   ============================================================ */

/* ---------- CSS Variables ---------- */
:root {
  --color-primary: #0f172a;
  --color-primary-light: #1e293b;
  --color-accent: #f59e0b;
  --color-accent-dark: #d97706;
  --color-white: #ffffff;
  --color-bg: #f8fafc;
  --color-bg-gray: #f1f5f9;
  --color-text: #1e293b;
  --color-text-light: #64748b;
  --color-text-muted: #94a3b8;
  --color-border: #e2e8f0;
  --color-green: #10b981;
  --color-blue: #3b82f6;
  --color-purple: #8b5cf6;
  --color-orange: #f97316;
  --shadow-sm: 0 1px 2px rgba(0,0,0,.05);
  --shadow: 0 1px 3px rgba(0,0,0,.08), 0 1px 2px rgba(0,0,0,.06);
  --shadow-md: 0 4px 6px rgba(0,0,0,.06), 0 2px 4px rgba(0,0,0,.04);
  --shadow-lg: 0 10px 25px rgba(0,0,0,.08), 0 4px 10px rgba(0,0,0,.04);
  --radius: 8px;
  --radius-lg: 12px;
  --transition: 0.2s ease;
  --max-width: 1200px;
}

/* ---------- Reset ---------- */
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;scroll-padding-top:80px}
body{font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei","Helvetica Neue",sans-serif;color:var(--color-text);line-height:1.7;background:var(--color-white);-webkit-font-smoothing:antialiased}
img{max-width:100%;height:auto;display:block}
a{color:inherit;text-decoration:none}
ul,ol{list-style:none}
button{cursor:pointer;font:inherit;border:none;background:none}
input,select,textarea{font:inherit}
.container{max-width:var(--max-width);margin:0 auto;padding:0 24px}

/* ---------- Utility ---------- */
.text-accent{color:var(--color-accent)}
.text-white{color:var(--color-white)}
.text-gray{color:var(--color-text-muted)}
.section{padding:100px 0}
.section--dark{background:var(--color-primary);color:var(--color-white)}
.section--gray{background:var(--color-bg-gray)}
.section__header{text-align:center;margin-bottom:64px}
.section__title{font-size:2rem;font-weight:700;letter-spacing:-0.02em;line-height:1.3;margin-bottom:12px}
.section__subtitle{font-size:1.125rem;color:var(--color-text-light);max-width:800px;margin:0 auto}
.section__subtitle--nowrap{white-space:nowrap}

/* ---------- Buttons ---------- */
.btn{display:inline-flex;align-items:center;justify-content:center;padding:14px 32px;border-radius:var(--radius);font-size:1rem;font-weight:600;transition:all var(--transition);white-space:nowrap}
.btn--primary{background:var(--color-accent);color:var(--color-primary)}
.btn--primary:hover{background:var(--color-accent-dark);transform:translateY(-1px);box-shadow:var(--shadow-md)}
.btn--outline{border:2px solid rgba(255,255,255,.3);color:var(--color-white)}
.btn--outline:hover{border-color:var(--color-white);background:rgba(255,255,255,.05)}
.btn--full{width:100%}

/* ========== HEADER ========== */
.header{position:fixed;top:0;left:0;right:0;z-index:1000;background:rgba(15,23,42,.92);backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);border-bottom:1px solid rgba(255,255,255,.08);transition:all var(--transition)}
.header.scrolled{background:rgba(15,23,42,.97);box-shadow:var(--shadow-lg)}
.header__inner{display:flex;align-items:center;justify-content:space-between;height:72px}
.logo{display:flex;align-items:center;gap:10px;font-weight:700;font-size:1.35rem;color:var(--color-white)}
.logo__img{width:36px;height:36px;flex-shrink:0}
.logo__mark{color:var(--color-accent)}
.nav{display:flex;align-items:center;gap:4px}
.nav__link{padding:8px 16px;font-size:.925rem;color:var(--color-text-muted);border-radius:6px;transition:all var(--transition)}
.nav__link:hover,.nav__link.active{color:var(--color-white)}
.nav__link--cta{background:var(--color-accent);color:var(--color-primary)!important;font-weight:600;margin-left:8px}
.nav__link--cta:hover{background:var(--color-accent-dark)}
.nav__link--product{font-weight:500;position:relative}
.nav__link--product::after{content:"";position:absolute;bottom:4px;left:16px;right:16px;height:2px;background:var(--color-accent);opacity:0;transition:opacity var(--transition)}
.nav__link--product:hover::after,.nav__link--product.active::after{opacity:.6}

.hamburger{display:none;flex-direction:column;gap:5px;width:32px;padding:4px}
.hamburger span{display:block;height:2px;background:var(--color-white);border-radius:2px;transition:all .3s}
.hamburger.active span:nth-child(1){transform:rotate(45deg) translate(5px,5px)}
.hamburger.active span:nth-child(2){opacity:0}
.hamburger.active span:nth-child(3){transform:rotate(-45deg) translate(5px,-5px)}

/* ========== HERO ========== */
.hero{position:relative;min-height:100vh;display:flex;align-items:center;overflow:hidden;background:var(--color-primary);color:var(--color-white)}
.hero__bg{position:absolute;inset:0;background:radial-gradient(ellipse 80% 60% at 50% 30%,rgba(245,158,11,.08) 0%,transparent 70%),radial-gradient(ellipse 60% 50% at 80% 80%,rgba(59,130,246,.06) 0%,transparent 70%);pointer-events:none}
.hero__inner{position:relative;z-index:1}
.hero__label{display:inline-block;font-size:.875rem;color:var(--color-accent);letter-spacing:.08em;margin-bottom:20px;padding:6px 14px;border:1px solid rgba(245,158,11,.25);border-radius:20px}
.hero__title{font-size:3.25rem;font-weight:800;line-height:1.15;letter-spacing:-0.03em;margin-bottom:24px;max-width:700px}
.hero__desc{font-size:1.15rem;color:var(--color-text-muted);line-height:1.8;max-width:580px;margin-bottom:36px}
.hero__desc strong{color:var(--color-white)}
.hero__actions{display:flex;gap:16px;flex-wrap:wrap;margin-bottom:64px}
.hero__stats{display:flex;gap:48px;margin-bottom:40px}
.hero__stat-num{display:block;font-size:2.5rem;font-weight:800;line-height:1;margin-bottom:6px}
.hero__stat-plus{font-size:1.25rem;font-weight:400}
.hero__stat-label{font-size:.875rem;color:var(--color-text-muted);line-height:1.5}

/* Hero trust banner */
.hero__trust{display:flex;align-items:center;gap:20px;flex-wrap:wrap;padding:16px 20px;background:rgba(255,255,255,.04);border:1px solid rgba(255,255,255,.08);border-radius:var(--radius);max-width:700px}
.hero__trust-label{font-size:.75rem;color:var(--color-text-muted);letter-spacing:.06em;white-space:nowrap}
.hero__trust-logos{display:flex;gap:16px;flex-wrap:wrap}
.hero__trust-logos span{font-size:.8rem;color:var(--color-text-muted);padding:4px 10px;background:rgba(255,255,255,.04);border-radius:4px;white-space:nowrap}

/* ========== METRICS ========== */
.metrics{background:var(--color-bg)}
.metrics__grid{display:flex;gap:24px;flex-wrap:wrap;justify-content:center}
.metrics-card{flex:0 0 calc(25% - 18px);min-width:200px;background:var(--color-white);border:1px solid var(--color-border);border-radius:var(--radius-lg);padding:32px 24px 28px;text-align:center;transition:all var(--transition)}
.metrics-card:hover{box-shadow:var(--shadow-md);transform:translateY(-2px);border-color:var(--color-accent)}
.metrics-card__icon{font-size:2rem;display:block;margin-bottom:12px}
.metrics-card__num{display:block;font-size:2.25rem;font-weight:800;line-height:1;margin-bottom:6px;color:var(--color-primary)}
.metrics-card__plus{font-size:1.1rem}
.metrics-card__label{display:block;font-size:.9rem;color:var(--color-text);font-weight:600;margin-bottom:4px}
.metrics-card__src{display:block;font-size:.75rem;color:var(--color-text-muted)}

/* ========== PROBLEM TABLE ========== */
.problem__table{border:1px solid var(--color-border);border-radius:var(--radius-lg);overflow:hidden}
.problem__table-row{display:grid;grid-template-columns:1fr 1.5fr 1.5fr;border-bottom:1px solid var(--color-border)}
.problem__table-row:last-child{border-bottom:none}
.problem__table-row--header{background:var(--color-primary);color:var(--color-white);font-weight:600}
.problem__table-col{padding:20px 24px;font-size:.9rem;line-height:1.6}
.problem__table-row--header .problem__table-col{padding:14px 24px;font-size:.85rem;letter-spacing:.05em}
.problem__table-col strong{color:var(--color-primary)}
.problem__table-col small{font-size:.78rem;color:var(--color-text-muted);font-weight:400}
.problem__table-row:not(.problem__table-row--header):hover{background:var(--color-bg)}
.problem__table-cta{text-align:center;margin-top:28px}
.problem__table-row:nth-child(even):not(.problem__table-row--header){background:var(--color-bg)}

/* ========== CASES ========== */
.cases{background:var(--color-bg-gray)}
.cases__grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.case-card{background:var(--color-white);border:1px solid var(--color-border);border-radius:var(--radius-lg);padding:32px 28px;transition:all var(--transition)}
.case-card:hover{box-shadow:var(--shadow-lg);transform:translateY(-2px)}
.case-card__tag{display:inline-block;font-size:.7rem;font-weight:700;color:var(--color-primary);background:var(--color-accent);padding:3px 10px;border-radius:12px;margin-bottom:14px;text-transform:uppercase;letter-spacing:.05em}
.case-card h3{font-size:1.1rem;font-weight:700;margin-bottom:6px}
.case-card__meta{font-size:.85rem;color:var(--color-text-light);font-weight:600;margin-bottom:14px}
.case-card__stats{display:flex;flex-wrap:wrap;gap:8px;margin-bottom:16px}
.case-card__stats span{font-size:.8rem;color:var(--color-text);background:var(--color-bg);padding:5px 12px;border-radius:8px}
.case-card__stats strong{color:var(--color-accent);font-weight:700}
.case-card blockquote{font-size:.85rem;color:var(--color-text-light);line-height:1.6;border-left:3px solid var(--color-accent);padding-left:16px;margin:0}
.case-card blockquote cite{display:block;font-size:.75rem;color:var(--color-text-muted);margin-top:6px;font-style:normal}

/* ========== SOLUTION STEPS ========== */
.solution__steps{display:flex;align-items:flex-start;justify-content:center;gap:24px}
.solution-step{flex:1;max-width:320px;background:rgba(255,255,255,.04);border:1px solid rgba(255,255,255,.1);border-radius:var(--radius-lg);padding:32px 28px;text-align:center;transition:all var(--transition)}
.solution-step:hover{background:rgba(255,255,255,.07);transform:translateY(-4px)}
.solution-step__num{display:inline-flex;align-items:center;justify-content:center;width:36px;height:36px;background:var(--color-accent);color:var(--color-primary);border-radius:50%;font-size:.9rem;font-weight:800;margin-bottom:14px}
.solution-step__title{font-size:1.1rem;font-weight:700;margin-bottom:4px}
.solution-step__sub{font-size:.8rem;color:var(--color-accent);font-weight:600;margin-bottom:12px}
.solution-step__desc{font-size:.85rem;color:var(--color-text-muted);line-height:1.55;margin-bottom:14px}
.solution-step__points{display:flex;flex-direction:column;gap:6px}
.solution-step__points li{font-size:.8rem;color:var(--color-text-muted);padding-left:14px;position:relative}
.solution-step__points li::before{content:"";position:absolute;left:0;top:7px;width:4px;height:4px;border-radius:50%;background:var(--color-accent)}
.solution-step__arrow{font-size:2rem;color:var(--color-accent);font-weight:700;padding-top:48px;flex-shrink:0}

/* ========== BUSINESS LINES ========== */
.biz__grid{display:grid;grid-template-columns:repeat(3,1fr);gap:28px;margin-bottom:0}
.biz-card{display:flex;flex-direction:column;background:var(--color-white);border:1px solid var(--color-border);border-radius:var(--radius-lg);overflow:hidden;transition:all .3s ease;cursor:pointer}
.biz-card:hover,.biz-card--active{border-color:var(--color-accent);box-shadow:var(--shadow-lg);transform:translateY(-4px)}
.biz-card--active{border-width:2px}
.biz-card__img{height:200px;overflow:hidden;background:var(--color-bg)}
.biz-card__img img{width:100%;height:100%;object-fit:cover;transition:transform .4s ease}
.biz-card:hover .biz-card__img img{transform:scale(1.05)}
.biz-card__body{padding:24px 24px 28px;display:flex;flex-direction:column;flex:1}
.biz-card__body h3{font-size:1.15rem;font-weight:700;margin-bottom:10px;color:var(--color-primary)}
.biz-card__body p{font-size:.9rem;color:var(--color-text-light);line-height:1.65;margin-bottom:16px;flex:1}
.biz-card__link{font-size:.875rem;font-weight:600;color:var(--color-accent);transition:color .2s}
.biz-card:hover .biz-card__link{color:var(--color-accent-dark)}

/* Biz panels (linked to cards) */
.biz__panels{margin-top:28px}
.biz-panel{display:none}
.biz-panel--active{display:block}
@keyframes fadeUp{from{opacity:0;transform:translateY(12px)}to{opacity:1;transform:translateY(0)}}

/* Architecture diagram inside biz panel */
.biz-panel__arch{display:flex;align-items:center;gap:10px;padding:24px 16px;flex-wrap:wrap;justify-content:center}
.biz-panel__arch-box{display:flex;flex-direction:column;align-items:center;gap:6px;padding:16px 14px;background:rgba(255,255,255,.06);border:1px solid rgba(255,255,255,.1);border-radius:var(--radius);font-size:.75rem;color:var(--color-text-muted);text-align:center;min-width:80px}
.biz-panel__arch-box svg{width:36px;height:36px;color:var(--color-accent)}
.biz-panel__arch-arrow{color:var(--color-text-muted);flex-shrink:0}
.biz-panel__arch-arrow svg{width:28px;height:20px}

/* ========== PROBLEM ========== */
.problem__grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;margin-bottom:64px}
.problem-card{background:var(--color-white);border:1px solid var(--color-border);border-radius:var(--radius-lg);padding:36px 28px;transition:all var(--transition);position:relative;display:flex;flex-direction:column;cursor:pointer}
.problem-card:hover{border-color:var(--color-accent);box-shadow:var(--shadow-md);transform:translateY(-2px)}
.problem-card--featured{border-color:var(--color-accent);border-width:2px;box-shadow:0 0 0 1px rgba(245,158,11,.15)}
.problem-card--featured:hover{box-shadow:var(--shadow-lg)}
.problem-card__badge{position:absolute;top:-1px;right:24px;background:var(--color-accent);color:var(--color-primary);font-size:.7rem;font-weight:700;padding:4px 12px;border-radius:0 0 8px 8px;text-transform:uppercase;letter-spacing:.06em}
.problem-card__icon{width:48px;height:48px;color:var(--color-accent);margin-bottom:20px}
.problem-card__title{font-size:1.15rem;font-weight:700;margin-bottom:10px}
.problem-card__desc{font-size:.95rem;color:var(--color-text-light);line-height:1.7;flex:1}
.problem-card__stat{display:block;font-size:.8rem;color:var(--color-text-muted);margin-top:16px;padding-top:12px;border-top:1px solid var(--color-border)}
.problem-card__stat strong{color:var(--color-accent);font-weight:700}
.problem__banner{background:linear-gradient(135deg,#fef3c7 0%,#fff7ed 100%);border:1px solid #fde68a;border-radius:var(--radius-lg);padding:32px 40px;text-align:center;margin-bottom:48px}
.problem__banner p{font-size:1rem;line-height:1.7;margin-bottom:6px}
.problem__banner p:last-child{margin-bottom:0}
.problem__banner strong{color:var(--color-primary)}

.impact-callout{display:flex;align-items:center;gap:64px;background:linear-gradient(135deg,#fef3c7 0%,#fff7ed 100%);border:1px solid #fde68a;border-radius:var(--radius-lg);padding:48px 56px}
.impact-callout__pie{position:relative;width:200px;height:200px;flex-shrink:0}
.impact-callout__pie svg{width:100%;height:100%}
.impact-callout__pie-num{position:absolute;inset:0;display:flex;align-items:center;justify-content:center;font-size:3rem;font-weight:800}
.impact-callout__title{font-size:1.35rem;font-weight:700;margin-bottom:14px}
.impact-callout__text p{font-size:.95rem;color:var(--color-text-light);line-height:1.7;margin-bottom:8px}
.impact-callout__conclusion{font-size:1.05rem!important;color:var(--color-primary)!important;margin-top:12px!important}
.impact-callout__cta{display:inline-block;margin-left:16px;font-size:1rem;font-weight:700;color:var(--color-accent);background:rgba(245,158,11,.12);padding:6px 18px;border-radius:20px;transition:all var(--transition)}
.impact-callout__cta:hover{background:var(--color-accent);color:var(--color-primary)}

/* ========== SOLUTION ========== */
.solution{position:relative}
.solution__overview{display:grid;grid-template-columns:1fr 1.5fr;gap:64px;align-items:center}
.solution__arch{display:flex;align-items:center;gap:12px;padding:32px;background:rgba(255,255,255,.04);border:1px solid rgba(255,255,255,.08);border-radius:var(--radius-lg)}
.solution__arch-box{display:flex;flex-direction:column;align-items:center;gap:8px;padding:20px 16px;background:rgba(255,255,255,.06);border-radius:var(--radius);font-size:.8rem;color:var(--color-text-muted);text-align:center;min-width:100px}
.solution__arch-box svg{width:40px;height:40px;color:var(--color-accent)}
.solution__arch-arrow{color:var(--color-text-muted);flex-shrink:0}
.solution__arch-arrow svg{width:36px;height:24px}
.feature-item{display:flex;gap:20px;padding:20px 0;border-bottom:1px solid rgba(255,255,255,.06)}
.feature-item:last-child{border-bottom:none}
.feature-item__num{flex-shrink:0;font-size:1rem;font-weight:800;color:var(--color-accent);padding-top:3px}
.feature-item h4{font-size:1.05rem;margin-bottom:6px}
.feature-item p{font-size:.9rem;color:var(--color-text-muted);line-height:1.6}

.solution__others{display:flex;flex-direction:column;gap:32px;margin-top:48px}
.solution-other{display:grid;grid-template-columns:1fr 1.5fr;gap:48px;align-items:center;background:rgba(255,255,255,.04);border:1px solid rgba(255,255,255,.08);border-radius:var(--radius-lg);padding:36px;position:relative;overflow:hidden}
.solution-other::before{content:"";position:absolute;top:0;left:0;right:0;height:4px;background:var(--color-accent)}
.solution-other--pdm::before{background:#3b82f6}
.solution-other--sag::before{background:#10b981}

/* ========== FLOAT CTA ========== */
.float-cta{position:fixed;bottom:32px;right:32px;z-index:999;display:inline-flex;align-items:center;gap:10px;background:var(--color-accent);color:var(--color-primary);padding:14px 24px;border-radius:50px;font-size:.95rem;font-weight:700;box-shadow:0 4px 20px rgba(245,158,11,.4);transition:all .3s ease;text-decoration:none}
.float-cta:hover{background:var(--color-accent-dark);transform:translateY(-2px);box-shadow:0 6px 28px rgba(245,158,11,.5)}
@media (max-width:768px){.float-cta{bottom:20px;right:20px;padding:12px 18px;font-size:.85rem}}

/* ========== CLIENTS ========== */
.clients{background:var(--color-bg-gray)}
.clients__header{text-align:center;margin-bottom:40px}
.clients__label{font-size:.8rem;color:var(--color-text-muted);letter-spacing:.1em;text-transform:uppercase;margin-bottom:6px}
.clients__grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.client-card{background:var(--color-white);border:1px solid var(--color-border);border-radius:var(--radius-lg);padding:4px;transition:all var(--transition)}
.client-card:hover{border-color:var(--color-accent);box-shadow:var(--shadow-md);transform:translateY(-2px)}
.client-card__inner{display:flex;flex-direction:column;align-items:center;text-align:center;padding:28px 20px 24px}
.client-card__logo{width:56px;height:56px;border-radius:14px;display:flex;align-items:center;justify-content:center;font-size:1rem;font-weight:800;margin-bottom:14px;color:#fff}
.client-card__logo--red{background:linear-gradient(135deg,#dc2626,#991b1b)}
.client-card__logo--blue{background:linear-gradient(135deg,#2563eb,#1e40af)}
.client-card__logo--green{background:linear-gradient(135deg,#059669,#065f46)}
.client-card__logo--orange{background:linear-gradient(135deg,#ea580c,#9a3412)}
.client-card__logo-img{height:50px;width:auto;max-width:85%;margin:0 auto 14px;display:block;border-radius:4px}
.client-card__inner strong{font-size:1rem;font-weight:700;margin-bottom:4px}
.client-card__inner span{font-size:.85rem;color:var(--color-text-light);margin-bottom:4px}
.client-card__inner small{font-size:.75rem;color:var(--color-accent);font-weight:600}

/* ========== VALUE ========== */
.value__grid{display:flex;gap:24px;flex-wrap:wrap;justify-content:center}
.value__grid > *{flex:0 0 calc(33.333% - 16px);min-width:260px}
.value-card{background:var(--color-white);border:1px solid var(--color-border);border-radius:var(--radius-lg);padding:32px 24px;transition:all var(--transition)}
.value-card:hover{box-shadow:var(--shadow-md);transform:translateY(-2px)}
.value-card__icon{width:40px;height:40px;border-radius:10px;display:flex;align-items:center;justify-content:center;margin-bottom:16px}
.value-card__icon svg{width:24px;height:24px}
.value-card__icon--green{background:#d1fae5;color:var(--color-green)}
.value-card__icon--blue{background:#dbeafe;color:var(--color-blue)}
.value-card__icon--orange{background:#ffedd5;color:var(--color-orange)}
.value-card__icon--purple{background:#ede9fe;color:var(--color-purple)}
.value-card h3{font-size:1rem;font-weight:700;margin-bottom:8px}
.value-card p{font-size:.875rem;color:var(--color-text-light);line-height:1.65}

/* ========== PRODUCTS ========== */
.product-tabs{display:flex;gap:0;justify-content:center;margin-bottom:40px;border:1px solid var(--color-border);border-radius:var(--radius);overflow:hidden}
.product-tab{padding:12px 28px;font-size:.95rem;font-weight:500;color:var(--color-text-light);background:var(--color-white);transition:all var(--transition)}
.product-tab.active{background:var(--color-primary);color:var(--color-white);font-weight:600}
.product-tab:hover:not(.active){background:var(--color-bg)}

.product-panel{display:none}
.product-panel.active{display:block}
.product-panel__inner{display:grid;grid-template-columns:1fr 1.5fr;gap:48px;align-items:start;background:var(--color-white);border:1px solid var(--color-border);border-radius:var(--radius-lg);padding:48px}
.product-panel__inner--full{grid-template-columns:1fr}
.product-panel__illustration{max-width:240px;margin:0 auto}
.product-panel__illustration svg{width:100%;height:auto}
.product-panel__info h3{font-size:1.5rem;font-weight:700;margin-bottom:6px}
.product-panel__tagline{color:var(--color-accent);font-weight:600;margin-bottom:20px}
.product-panel__benefits{display:flex;flex-direction:column;gap:12px}
.product-panel__benefits li{font-size:.925rem;color:var(--color-text);line-height:1.6;padding-left:20px;position:relative}
.product-panel__benefits li::before{content:"";position:absolute;left:0;top:10px;width:6px;height:6px;border-radius:50%;background:var(--color-accent)}
.product-panel__specs{margin-top:20px}
.product-panel__specs summary{cursor:pointer;font-size:.875rem;color:var(--color-text-light);font-weight:500}
.product-panel__specs summary:hover{color:var(--color-accent)}
.specs-table{margin-top:12px;border:1px solid var(--color-border);border-radius:var(--radius);overflow:hidden}
.specs-row{display:flex;font-size:.85rem}
.specs-row:nth-child(even){background:var(--color-bg)}
.specs-row span{padding:8px 14px}
.specs-row span:first-child{width:120px;flex-shrink:0;font-weight:600;color:var(--color-text-light);border-right:1px solid var(--color-border);background:var(--color-bg)}

/* ========== ADVANTAGES ========== */
.advantages__grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.advantage-card{background:var(--color-white);border:1px solid var(--color-border);border-radius:var(--radius-lg);padding:32px 28px;transition:all var(--transition)}
.advantage-card:hover{border-color:var(--color-primary);box-shadow:var(--shadow-md)}
.advantage-card h4{font-size:1.05rem;font-weight:700;margin-bottom:10px;padding-bottom:10px;border-bottom:2px solid var(--color-accent)}
.advantage-card p{font-size:.9rem;color:var(--color-text-light);line-height:1.65}

/* ========== APPLICATIONS ========== */
.applications__grid{display:grid;grid-template-columns:repeat(6,1fr);gap:20px}
.app-card{display:flex;flex-direction:column;align-items:center;gap:12px;padding:28px 16px;background:var(--color-white);border:1px solid var(--color-border);border-radius:var(--radius-lg);transition:all var(--transition)}
.app-card:hover{border-color:var(--color-accent);box-shadow:var(--shadow-md);transform:translateY(-2px)}
.app-card svg{width:40px;height:40px;color:var(--color-primary);opacity:.6}
.app-card span{font-size:.9rem;font-weight:600}

/* ========== ABOUT ========== */
.about__inner{display:grid;grid-template-columns:1fr 300px;gap:64px;align-items:start}
.about__text p{font-size:.95rem;color:var(--color-text-light);line-height:1.8;margin-bottom:16px}
.about__intro{font-size:1.05rem!important;color:var(--color-text)!important}
.about__values{display:grid;grid-template-columns:1fr 1fr;gap:20px}
.about-value{background:var(--color-bg);border:1px solid var(--color-border);border-radius:var(--radius-lg);padding:28px 20px;text-align:center;transition:all var(--transition)}
.about-value:hover{border-color:var(--color-accent)}
.about-value__num{display:block;font-size:1.75rem;font-weight:800;color:var(--color-primary);margin-bottom:4px}
.about-value__label{font-size:.85rem;color:var(--color-text-light)}

/* ========== CONTACT ========== */
.contact__top{display:flex;align-items:center;justify-content:space-between;gap:32px;margin-bottom:48px;flex-wrap:wrap}
.contact__heading{font-size:1.6rem;font-weight:700;color:var(--color-white);margin-bottom:6px}
.contact__sub{font-size:.95rem;color:var(--color-text-muted)}
.contact__phone-big{display:inline-flex;align-items:center;gap:10px;font-size:1.6rem;font-weight:800;color:var(--color-accent);white-space:nowrap;padding:14px 28px;border:2px solid rgba(245,158,11,.3);border-radius:var(--radius-lg);transition:all var(--transition)}
.contact__phone-big:hover{background:rgba(245,158,11,.1);border-color:var(--color-accent)}
.contact__grid{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}
.contact__info-card{display:flex;align-items:center;gap:14px;background:rgba(255,255,255,.04);border:1px solid rgba(255,255,255,.08);border-radius:var(--radius-lg);padding:18px 20px;transition:all var(--transition)}
.contact__info-card:hover{border-color:rgba(255,255,255,.18);background:rgba(255,255,255,.07)}
.contact__info-icon{flex-shrink:0;width:40px;height:40px;background:rgba(245,158,11,.12);border-radius:10px;display:flex;align-items:center;justify-content:center;color:var(--color-accent)}
.contact__info-label{font-size:.75rem;color:var(--color-text-muted);margin-bottom:2px;text-transform:uppercase;letter-spacing:.04em}
.contact__info-link{font-size:.9rem;color:var(--color-text-muted);transition:color var(--transition)}
.contact__info-link:hover{color:var(--color-accent)}
.contact__info-text{font-size:.85rem;color:var(--color-text-muted);line-height:1.4}

/* ========== FOOTER ========== */
.footer{background:var(--color-primary);border-top:1px solid rgba(255,255,255,.06);padding:40px 0}
.footer__inner{display:flex;align-items:center;justify-content:space-between;flex-wrap:wrap;gap:20px}
.footer__brand{display:flex;align-items:baseline;gap:8px;flex-wrap:wrap}
.footer__desc{font-size:.8rem;color:var(--color-text-muted);width:100%;margin-top:4px}
.footer__links{display:flex;gap:24px}
.footer__links a{font-size:.875rem;color:var(--color-text-muted);transition:color var(--transition)}
.footer__links a:hover{color:var(--color-accent)}
.footer__copy{display:flex;gap:16px;font-size:.8rem;color:var(--color-text-muted)}
.footer__copy a{color:var(--color-text-muted);transition:color var(--transition)}
.footer__copy a:hover{color:var(--color-accent)}

/* ========== PREDICTIVE MAINTENANCE ========== */
.pdm__intro{max-width:800px;margin:0 auto 56px;text-align:center;font-size:1.05rem;line-height:1.8}
.pdm__intro strong{color:var(--color-primary)}
.pdm__subtitle{font-size:1.35rem;font-weight:700;text-align:center;margin-bottom:28px}
.pdm__subtitle::after{content:"";display:block;width:48px;height:3px;background:var(--color-accent);margin:12px auto 0;border-radius:2px}
.pdm__dual,.pdm__func-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:24px;margin-bottom:56px}
.pdm-dual-card{background:var(--color-white);border:1px solid var(--color-border);border-radius:var(--radius-lg);padding:32px 28px;transition:all var(--transition)}
.pdm-dual-card:hover{box-shadow:var(--shadow-md)}
.pdm-dual-card h4{font-size:1.05rem;font-weight:700;margin-bottom:10px}
.pdm-dual-card p{font-size:.9rem;color:var(--color-text-light);line-height:1.65}
.pdm-dual-card--icon{display:flex;align-items:flex-start;gap:20px}
.pdm-dual-card__icon{flex-shrink:0;width:48px;height:48px;color:var(--color-accent)}
.pdm-dual-card__icon svg{width:100%;height:100%}
.pdm__sensor-desc{text-align:center;color:var(--color-text-light);margin-bottom:20px}
.pdm__domains,.pdm__sensor,.pdm__functions,.sag__rnd,.sag__cycle{margin-bottom:64px}
.pdm__functions{margin-bottom:0}
.specs-table--grid{display:grid;grid-template-columns:1fr}
.pdm-func-card{background:var(--color-white);border:1px solid var(--color-border);border-radius:var(--radius-lg);padding:28px 24px;transition:all var(--transition)}
.pdm-func-card:hover{border-color:var(--color-accent);box-shadow:var(--shadow-md)}
.pdm-func-card h4{font-size:1rem;font-weight:700;margin-bottom:8px;color:var(--color-primary)}
.pdm-func-card p{font-size:.9rem;color:var(--color-text-light);line-height:1.6}

/* ========== SAG MILL ========== */
.sag__hero-stat{display:flex;justify-content:center;gap:64px;margin-bottom:64px}
.sag-stat{text-align:center}
.sag-stat__num{display:block;font-size:3rem;font-weight:800;line-height:1;margin-bottom:6px;color:var(--color-primary)}
.sag-stat__label{font-size:.9rem;color:var(--color-text-light);line-height:1.5}
.sag__problem{max-width:800px;margin:0 auto 64px;text-align:center}
.sag__problem p{font-size:1rem;line-height:1.8;color:var(--color-text-light)}
.sag__problem strong{color:var(--color-primary)}
.sag__problem-img{margin-bottom:28px}
.sag__problem-img img{max-width:100%;border-radius:var(--radius-lg);box-shadow:var(--shadow-md)}
.sag__solution{margin-bottom:56px}
.sag__solution-desc{text-align:center;max-width:750px;margin:0 auto 32px;font-size:1rem;line-height:1.8}
.sag__research-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.sag-research-card{background:var(--color-white);border:1px solid var(--color-border);border-radius:var(--radius-lg);padding:24px 20px;display:flex;align-items:flex-start;gap:14px;transition:all var(--transition)}
.sag-research-card:hover{border-color:var(--color-accent);box-shadow:var(--shadow-md)}
.sag-research-card__num{flex-shrink:0;width:32px;height:32px;background:var(--color-primary);color:var(--color-accent);border-radius:50%;display:flex;align-items:center;justify-content:center;font-size:.85rem;font-weight:800}
.sag-research-card p{font-size:.9rem;color:var(--color-text-light);line-height:1.6}
.sag__benefits{margin-bottom:64px}

/* SAG image blocks */
.sag__img-block{margin-bottom:64px}
.sag__img-desc{text-align:center;color:var(--color-text-light);font-size:.95rem;margin-bottom:28px;max-width:700px;margin-left:auto;margin-right:auto}
.sag__img-wrap{background:var(--color-bg);border:1px solid var(--color-border);border-radius:var(--radius-lg);padding:32px;text-align:center}
.sag__img-wrap img{max-width:100%;height:auto}
.sag__img-wrap--light{background:var(--color-white)}
.sag__img-row{display:grid;grid-template-columns:1fr 1fr;gap:24px}
.sag__img-half{background:var(--color-bg);border:1px solid var(--color-border);border-radius:var(--radius-lg);padding:20px;text-align:center}
.sag__img-half img{max-width:100%;height:auto}

/* SAG tools grid with images */
.sag__tools-grid-full{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.sag-tool-card-full{background:var(--color-white);border:1px solid var(--color-border);border-radius:var(--radius-lg);overflow:hidden;transition:all var(--transition)}
.sag-tool-card-full:hover{border-color:var(--color-accent);box-shadow:var(--shadow-md);transform:translateY(-2px)}
.sag-tool-card-full__img{background:var(--color-bg);padding:16px;text-align:center}
.sag-tool-card-full__img img{max-width:100%;max-height:160px;width:auto;height:auto;object-fit:contain}
.sag-tool-card-full__text{padding:20px}
.sag-tool-card-full__text h4{font-size:1rem;font-weight:700;margin-bottom:6px}
.sag-tool-card-full__text p{font-size:.85rem;color:var(--color-text-light);line-height:1.55}

/* SAG cycle */
.sag__cycle{margin-bottom:0}
.sag__cycle .pdm__subtitle{margin-bottom:32px}
.sag__cycle-steps{display:flex;align-items:center;justify-content:center;flex-wrap:wrap;gap:16px}
.sag-cycle-step{background:var(--color-white);border:1px solid var(--color-border);border-radius:var(--radius-lg);padding:24px 20px;text-align:center;min-width:140px;transition:all var(--transition)}
.sag-cycle-step:hover{border-color:var(--color-accent)}
.sag-cycle-step__num{display:inline-flex;align-items:center;justify-content:center;width:40px;height:40px;background:var(--color-accent);color:var(--color-primary);border-radius:50%;font-size:1.1rem;font-weight:800;margin-bottom:10px}
.sag-cycle-step h4{font-size:.95rem;font-weight:700;margin-bottom:4px}
.sag-cycle-step p{font-size:.8rem;color:var(--color-text-light)}
.sag-cycle-step__arrow{font-size:1.5rem;color:var(--color-accent);font-weight:700}

/* SAG tab content inside products */
.sag-tab-content{background:var(--color-white);border:1px solid var(--color-border);border-radius:var(--radius-lg);padding:40px}
.sag-tab-content .sag__hero-stat{margin-bottom:32px}
.sag-tab-content .sag__solution-desc{text-align:center;max-width:750px;margin:0 auto 28px;font-size:.95rem;line-height:1.7}
.sag-tab-content .sag__research-grid{margin-bottom:48px}
.sag-tab-section-title{font-size:1.15rem;font-weight:700;text-align:center;margin-bottom:12px;margin-top:40px}
.sag-tab-section-title::after{content:"";display:block;width:40px;height:3px;background:var(--color-accent);margin:8px auto 0;border-radius:2px}
.sag-tab-content .sag__img-desc{text-align:center;color:var(--color-text-light);font-size:.9rem;margin-bottom:20px;max-width:650px;margin-left:auto;margin-right:auto}
.sag-tab-content .sag__img-wrap{background:var(--color-bg);border:1px solid var(--color-border);border-radius:var(--radius-lg);padding:24px;text-align:center;margin-bottom:8px}
.sag-tab-content .sag__img-wrap img{max-width:100%;height:auto}
.sag-tab-content .sag__img-wrap--light{background:var(--color-white)}
.sag-tab-content .sag__img-row{display:grid;grid-template-columns:1fr 1fr;gap:20px;margin-bottom:8px}
.sag-tab-content .sag__img-half{background:var(--color-bg);border:1px solid var(--color-border);border-radius:var(--radius-lg);padding:16px;text-align:center}
.sag-tab-content .sag__img-half img{max-width:100%;height:auto}
.sag-tab-content .sag__tools-grid-full{display:grid;grid-template-columns:repeat(3,1fr);gap:16px;margin-bottom:8px}
.sag-tab-content .sag-tool-card-full{background:var(--color-bg);border:1px solid var(--color-border);border-radius:var(--radius-lg);overflow:hidden;transition:all var(--transition)}
.sag-tab-content .sag-tool-card-full:hover{border-color:var(--color-accent);box-shadow:var(--shadow-md)}
.sag-tab-content .sag-tool-card-full__img{background:var(--color-white);padding:12px;text-align:center}
.sag-tab-content .sag-tool-card-full__img img{max-width:100%;max-height:120px;width:auto;height:auto;object-fit:contain}
.sag-tab-content .sag-tool-card-full__text{padding:14px 16px}
.sag-tab-content .sag-tool-card-full__text h4{font-size:.9rem;font-weight:700;margin-bottom:4px}
.sag-tab-content .sag-tool-card-full__text p{font-size:.8rem;color:var(--color-text-light);line-height:1.5}
.sag-tab-content .sag__benefits{margin-top:40px}
.sag-tab-content .value__grid > *{min-width:200px}

/* ========== RESPONSIVE ========== */
@media (max-width:1024px){
  .solution__steps{flex-direction:column;align-items:center}
  .solution-step{max-width:400px;width:100%}
  .solution-step__arrow{transform:rotate(90deg);padding-top:0;padding:8px 0}
  .cases__grid{grid-template-columns:repeat(2,1fr)}
  .solution-other{grid-template-columns:1fr;gap:32px;padding:28px}
  .biz-panel__arch{flex-direction:column;gap:6px}
  .value__grid > *{flex:0 0 calc(50% - 12px)}
  .advantages__grid{grid-template-columns:repeat(2,1fr)}
  .applications__grid{grid-template-columns:repeat(3,1fr)}
  .about__inner{grid-template-columns:1fr}
  .contact__grid{grid-template-columns:repeat(2,1fr)}
  .pdm__func-grid{grid-template-columns:1fr}
  .sag__research-grid{grid-template-columns:repeat(2,1fr)}
  .sag__tools-grid{grid-template-columns:repeat(2,1fr)}
  .sag__tools-grid-full{grid-template-columns:repeat(2,1fr)}
  .sag-tab-content .sag__tools-grid-full{grid-template-columns:repeat(2,1fr)}
}

@media (max-width:768px){
  .section{padding:64px 0}
  .section__title{font-size:1.5rem}

  .hero{min-height:auto;padding:120px 0 48px}
  .hero__title{font-size:2rem}
  .hero__desc{font-size:1rem}
  .hero__stats{flex-wrap:wrap;gap:24px}
  .hero__stat-num{font-size:1.75rem}

  .nav{position:fixed;top:72px;left:0;right:0;flex-direction:column;background:rgba(15,23,42,.98);padding:16px 24px;gap:2px;display:none;backdrop-filter:blur(12px)}
  .nav.open{display:flex}
  .nav__link{padding:14px 16px;font-size:1rem;border-radius:8px}
  .nav__link--cta{margin-left:0;text-align:center}
  .hamburger{display:flex}

  .problem__grid{grid-template-columns:1fr}
  .problem__table-row{grid-template-columns:1fr}
  .problem__table-col{padding:14px 18px}
  .problem__table-row--header{display:none}
  .problem__table-col:before{content:attr(data-label);display:block;font-size:.75rem;font-weight:600;color:var(--color-accent);margin-bottom:4px}
  .solution-other{grid-template-columns:1fr;gap:20px;padding:20px}
  .impact-callout{flex-direction:column;padding:32px;text-align:center}
  .impact-callout__pie{width:160px;height:160px}
  .impact-callout__pie-num{font-size:2.25rem}

  .value__grid > *{flex:0 0 100%}
  .value-card h3{font-size:.95rem}
  .product-panel__inner{grid-template-columns:1fr;padding:28px}
  .product-panel__illustration{max-width:160px}
  .product-tabs{flex-wrap:wrap}
  .product-tab{flex:1;min-width:100px;font-size:.8rem;padding:10px 12px;text-align:center}
  .advantages__grid{grid-template-columns:1fr}
  .applications__grid{grid-template-columns:repeat(2,1fr)}
  .about__values{grid-template-columns:1fr 1fr}
  .contact__top{flex-direction:column;text-align:center}
  .contact__grid{grid-template-columns:1fr}
  .clients__grid{grid-template-columns:1fr}
  .footer__inner{flex-direction:column;text-align:center}

  .pdm__dual{grid-template-columns:1fr}
  .pdm__func-grid{grid-template-columns:1fr}
  .cases__grid{grid-template-columns:1fr}
  .sag__hero-stat{flex-direction:column;gap:24px}
  .sag-stat__num{font-size:2.25rem}
  .sag__research-grid{grid-template-columns:1fr}
  .solution-other{grid-template-columns:1fr;gap:24px;padding:24px}
  .clients__grid{grid-template-columns:repeat(2,1fr);max-width:500px;margin:0 auto}
  .biz-panel__arch{flex-direction:column;gap:6px}
  .sag__tools-grid{grid-template-columns:1fr}
  .sag-tab-content .sag__tools-grid-full{grid-template-columns:1fr}
  .sag-tab-content .sag__img-row{grid-template-columns:1fr}
  .sag-tab-content .sag-tool-card-full__img img{max-height:160px}
  .sag__cycle-steps{flex-direction:column}
  .sag-cycle-step__arrow{transform:rotate(90deg)}
}