/* ========================================
   历德创新 AINITT - 官方网站样式
   品牌色: #1A3A5C(深空蓝) / #E8752A(活力橙) / #2A6B9C(科技蓝)
   ======================================== */

*, *::before, *::after { margin:0; padding:0; box-sizing:border-box; }

:root {
    --c-primary: #1A3A5C;
    --c-primary-l: #264f7a;
    --c-primary-d: #112840;
    --c-accent: #1A3A5C;
    --c-accent-l: #3b5998;
    --c-accent-d: #0c1e33;

    --c-tech-blue: #2A6B9C;
    --c-tech-blue-l: #3b82c4;
    --c-tech-blue-d: #1e5278;

    --c-layer-m: #1A3A5C;
    --c-layer-e: #E8752A;
    --c-layer-s: #7B4BBA;

    --c-dark: #0c1e33;
    --c-dark2: #15273f;
    --c-text: #1e293b;
    --c-text-l: #64748b;
    --c-text-ll: #94a3b8;
    --c-white: #ffffff;
    --c-gray-bg: #F4F6F8;
    --c-gray-bg2: #EEF0F4;
    --c-border: #E5E8EC;
    --c-border-l: #EEF0F4;
    --c-footer-text: #D1D5DB;

    --shadow-sm: 0 1px 3px rgba(0,0,0,.06);
    --shadow-md: 0 8px 24px rgba(0,0,0,.08);
    --shadow-lg: 0 16px 48px rgba(0,0,0,.12);
    --radius: 10px;
    --radius-sm: 6px;
    --radius-lg: 16px;
    --radius-xl: 24px;
    --t: .3s cubic-bezier(.4,0,.2,1);
    --font: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Noto Sans SC', 'Microsoft YaHei', sans-serif;
    --max-w: 1280px;
}

html { scroll-behavior:smooth; font-size:16px; }
body {
    font-family:var(--font);
    color:var(--c-text);
    background:var(--c-white);
    line-height:1.65;
    overflow-x:hidden;
    -webkit-font-smoothing:antialiased;
}
a { text-decoration:none; color:inherit; }
ul { list-style:none; }
img { max-width:100%; display:block; }

.container { max-width:var(--max-w); margin:0 auto; padding:0 24px; }
.section { padding:96px 0; position:relative; }
.section-gray { background:var(--c-gray-bg); }
.section-dark { background:var(--c-dark); position:relative; overflow:hidden; }

/* ---- Section Headers ---- */
.section-header { text-align:center; max-width:780px; margin:0 auto 60px; }
.section-label {
    display:inline-block; font-size:.78rem; font-weight:600; letter-spacing:.08em;
    color:var(--c-primary); margin-bottom:14px;
    padding:5px 16px; background:rgba(26,58,92,.07); border-radius:50px;
}
.section-label-l {
    color:rgba(255,255,255,.9); background:rgba(255,255,255,.08); border:1px solid rgba(255,255,255,.15);
    backdrop-filter:blur(8px);
}
.section-title { font-size:clamp(1.7rem,3vw,2.6rem); font-weight:700; color:var(--c-text); margin-bottom:16px; line-height:1.2; }
.section-title-l { color:var(--c-white); letter-spacing:.04em; }
.section-desc { font-size:1rem; color:var(--c-text-l); font-weight:400; line-height:1.7; }
.section-desc-l { color:rgba(255,255,255,.65); }

/* ---- Buttons ---- */
.btn {
    display:inline-flex; align-items:center; justify-content:center; gap:8px;
    padding:13px 28px; font-size:.93rem; font-weight:600; border-radius:50px;
    transition:all var(--t); cursor:pointer; border:none; font-family:var(--font); white-space:nowrap;
}
.btn-primary { background:var(--c-accent); color:var(--c-white); box-shadow:0 4px 16px rgba(26,58,92,.25); }
.btn-primary:hover { background:var(--c-accent-d); transform:translateY(-2px); box-shadow:0 8px 24px rgba(26,58,92,.35); }
.btn-outline { background:transparent; color:var(--c-primary); border:2px solid var(--c-border); }
.btn-outline:hover { border-color:var(--c-primary); background:var(--c-primary); color:var(--c-white); }
.btn-outline-l { background:transparent; color:rgba(255,255,255,.85); border:2px solid rgba(255,255,255,.2); }
.btn-outline-l:hover { background:rgba(255,255,255,.08); border-color:rgba(255,255,255,.45); }
.btn-white { background:var(--c-white); color:var(--c-primary); }
.btn-white:hover { background:var(--c-accent); color:var(--c-white); transform:translateY(-2px); }
.btn-full { width:100%; }

/* ========================================
   NAVIGATION
   ======================================== */
.navbar {
    position:fixed; top:0; left:0; right:0; z-index:1000;
    background:rgba(255,255,255,.95); backdrop-filter:blur(20px); -webkit-backdrop-filter:blur(20px);
    border-bottom:1px solid rgba(26,58,92,.06); transition:all var(--t);
}
.navbar.scrolled { box-shadow:0 2px 16px rgba(0,0,0,.06); background:rgba(255,255,255,.98); }
.nav-inner { max-width:var(--max-w); margin:0 auto; padding:0 24px; height:68px; display:flex; align-items:center; justify-content:space-between; }

.nav-brand { display:flex; flex-direction:column; align-items:center; gap:5px; }
.nav-logo { font-size:1.55rem; font-weight:900; color:var(--c-primary); letter-spacing:.04em; line-height:1; }
.nav-logo-img { height:19px; width:auto; display:block; }
.nav-logo-cn { font-size:.9375rem; color:var(--c-text-ll); font-weight:500; letter-spacing:.1em; line-height:1; }

.nav-menu { display:flex; align-items:center; gap:2px; }
.nav-link {
    display:block; padding:8px 15px; font-size:.88rem; font-weight:500; color:var(--c-text);
    border-radius:var(--radius-sm); transition:all var(--t); position:relative;
}
.nav-link::after {
    content:''; position:absolute; bottom:3px; left:50%; transform:translateX(-50%);
    width:0; height:2px; background:var(--c-accent); transition:width var(--t);
}
.nav-link:hover { color:var(--c-tech-blue); }
.nav-link:hover::after, .nav-link.active::after { width:18px; }

.nav-cta { background:var(--c-primary); color:var(--c-white)!important; padding:9px 22px!important; border-radius:50px; font-weight:600; }
.nav-cta::after { display:none; }
.nav-cta:hover { background:var(--c-primary-l); transform:translateY(-1px); box-shadow:0 4px 12px rgba(26,58,92,.35); }

.nav-tools { display:flex; align-items:center; gap:12px; }
.lang-btn {
    background:var(--c-gray-bg); border:1px solid var(--c-border); border-radius:6px;
    padding:5px 10px; font-size:.78rem; font-weight:600; color:var(--c-text); cursor:pointer; transition:all var(--t);
}
.lang-btn:hover { background:var(--c-tech-blue); color:var(--c-white); border-color:var(--c-tech-blue); }

.hamburger { display:none; flex-direction:column; gap:5px; background:none; border:none; cursor:pointer; padding:8px; }
.hamburger span { display:block; width:22px; height:2px; background:var(--c-text); border-radius:2px; transition:all var(--t); }
.hamburger.active span:nth-child(1) { transform:translateY(7px) rotate(45deg); }
.hamburger.active span:nth-child(2) { opacity:0; }
.hamburger.active span:nth-child(3) { transform:translateY(-7px) rotate(-45deg); }

/* ========================================
   HERO — Scene-Driven
   ======================================== */
.hero {
    position:relative; min-height:92vh; display:flex; align-items:center; justify-content:center;
    overflow:hidden; background:var(--c-dark); padding-top:68px;
}
.hero-bg { position:absolute; inset:0; z-index:0; }
.hero-bg-img {
    position:absolute; inset:0;
    background:url('../images/hero-bg.jpg') center/cover no-repeat;
    background-position:60% center;
}
.hero-bg-gradient {
    position:absolute; inset:0;
    background:linear-gradient(160deg, rgba(12,30,51,.88) 0%, rgba(26,58,92,.72) 40%, rgba(15,40,64,.82) 100%);
}
.hero-bg-pattern {
    position:absolute; inset:0; opacity:.04;
    background-image:radial-gradient(circle at 1px 1px, rgba(255,255,255,.8) 1px, transparent 0);
    background-size:48px 48px;
}
.hero-bg-glow {
    position:absolute; width:600px; height:600px; border-radius:50%; filter:blur(120px); opacity:.12;
}
.hero-bg-glow.g1 { background:var(--c-accent); top:-200px; right:-100px; }
.hero-bg-glow.g2 { background:var(--c-tech-blue); bottom:-200px; left:-100px; }

.hero-particles { position:absolute; inset:0; overflow:hidden; }
.hero-particles .particle {
    position:absolute; border-radius:50%; background:rgba(26,58,92,.3);
    animation:partFloat linear infinite;
}
@keyframes partFloat {
    0% { transform:translateY(100vh) translateX(0); opacity:0; }
    10% { opacity:1; } 90% { opacity:1; }
    100% { transform:translateY(-100px) translateX(50px); opacity:0; }
}

.hero-inner { position:relative; z-index:2; text-align:center; padding:0 24px; max-width:900px; }
.hero-tag {
    display:inline-flex; align-items:center; gap:14px;
    font-size:.7rem; font-weight:500;
    color:rgba(255,255,255,.5);
    letter-spacing:.22em; text-transform:uppercase;
    margin-bottom:28px;
}
.hero-tag::before, .hero-tag::after {
    content:""; width:36px; height:1px; background:rgba(255,255,255,.18);
}
.hero-title {
    font-size:clamp(1.9rem,4vw,3.2rem); font-weight:700; color:var(--c-white);
    letter-spacing:.06em; margin-bottom:20px; line-height:1.35;
}
.hero-title .hl { color:var(--c-accent-l); }
.hero-subtitle {
    font-size:clamp(.95rem,1.6vw,1.2rem); color:rgba(255,255,255,.55); font-weight:400;
    margin-bottom:20px; max-width:680px; margin-left:auto; margin-right:auto; line-height:1.7;
    letter-spacing:.04em;
}
.hero-desc-func {
    font-size:clamp(.82rem,1.2vw,.95rem); color:rgba(255,255,255,.35); font-weight:300;
    margin-bottom:36px; max-width:720px; margin-left:auto; margin-right:auto; line-height:1.6;
    letter-spacing:.03em;
}

/* Quick Nav */
.quick-nav { display:flex; gap:8px; flex-wrap:wrap; justify-content:center; padding:20px 0 0; }
.quick-nav a {
    display:inline-block; padding:8px 18px; font-size:.85rem; font-weight:500;
    color:var(--c-text-l); border:1px solid var(--c-border); border-radius:50px;
    transition:all .25s ease; text-decoration:none;
}
.quick-nav a:hover { color:var(--c-primary); border-color:var(--c-primary); background:rgba(26,58,92,.04); }

/* Scene Cards */
.scene-cards { display:grid; grid-template-columns:repeat(4,1fr); gap:18px; margin-bottom:0; }
.scene-card {
    position:relative;
    background:rgba(10,22,38,.55); border:1px solid rgba(255,255,255,.12);
    border-radius:18px; padding:34px 20px 30px; text-align:center;
    transition:all .4s ease; cursor:pointer;
    display:flex; flex-direction:column; align-items:center; gap:16px;
    overflow:hidden;
    backdrop-filter:blur(8px);
    /* default theme: warm orange */
    --sc-color: #E8752A;
    --sc-color-glow: rgba(26,58,92,.15);
}
.scene-card[data-theme="semicon"]   { --sc-color: #7C6FE0; --sc-color-glow: rgba(124,111,224,.18); }
.scene-card[data-theme="smartmf"]   { --sc-color: #4A8FCC; --sc-color-glow: rgba(74,143,204,.18); }
.scene-card[data-theme="newenergy"] { --sc-color: #10B981; --sc-color-glow: rgba(16,185,129,.18); }
.scene-card[data-theme="oilgas"]    { --sc-color: #E8752A; --sc-color-glow: rgba(26,58,92,.18); }

.scene-card::before {
    content:""; position:absolute; inset:0;
    background:linear-gradient(160deg, rgba(255,255,255,.08) 0%, transparent 55%);
    opacity:0.7; transition:opacity .4s ease;
}
.scene-card::after {
    content:""; position:absolute; top:0; left:20%; right:20%; height:1px;
    background:linear-gradient(90deg, transparent, rgba(255,255,255,.35), transparent);
    opacity:0.6; transition:all .4s ease;
}
.scene-card:hover {
    border-color:rgba(255,255,255,.28);
    background:rgba(10,22,38,.72);
    transform:translateY(-5px);
    box-shadow:0 20px 40px rgba(0,0,0,.25), 0 0 0 1px var(--sc-color-glow);
}
.scene-card:hover::before { opacity:1; }
.scene-card:hover::after { opacity:1; background:linear-gradient(90deg, transparent, var(--sc-color), transparent); }
.scene-icon {
    position:relative; z-index:1;
    width:72px; height:72px; display:flex; align-items:center; justify-content:center;
    color:var(--sc-color); transition:all .4s ease;
    border-radius:50%;
    background:linear-gradient(135deg, color-mix(in srgb, var(--sc-color) 15%, transparent) 0%, color-mix(in srgb, var(--sc-color) 5%, transparent) 100%);
    border:1px solid color-mix(in srgb, var(--sc-color) 35%, transparent);
    box-shadow:0 8px 24px color-mix(in srgb, var(--sc-color) 15%, transparent), inset 0 1px 0 rgba(255,255,255,.1);
}
.scene-icon svg { width:36px; height:36px; stroke-width:1.5; }
.scene-card:hover .scene-icon {
    color:var(--sc-color);
    filter:brightness(1.2);
    background:linear-gradient(135deg, color-mix(in srgb, var(--sc-color) 25%, transparent) 0%, color-mix(in srgb, var(--sc-color) 8%, transparent) 100%);
    border-color:color-mix(in srgb, var(--sc-color) 50%, transparent);
    box-shadow:0 12px 32px color-mix(in srgb, var(--sc-color) 25%, transparent), inset 0 1px 0 rgba(255,255,255,.15);
    transform:scale(1.05);
}
.scene-label {
    position:relative; z-index:1;
    font-size:1rem; font-weight:600; color:var(--c-white);
    letter-spacing:.06em;
}
.scene-arrow {
    position:relative; z-index:1;
    font-size:.78rem; font-weight:500; color:rgba(255,255,255,.5);
    opacity:0; transform:translateY(-6px);
    transition:all .35s ease; letter-spacing:.08em;
}
.scene-card:hover .scene-arrow { opacity:1; transform:translateY(0); color:var(--sc-color); }

.hero-scroll {
    position:absolute; bottom:28px; left:50%; transform:translateX(-50%); z-index:2;
    display:flex; flex-direction:column; align-items:center; gap:8px;
    color:rgba(255,255,255,.35); font-size:.78rem;
}
.scroll-line {
    width:1px; height:36px; background:linear-gradient(to bottom, rgba(255,255,255,.4), transparent);
    animation:scrollBounce 2s ease-in-out infinite;
}
@keyframes scrollBounce {
    0%,100% { opacity:.2; transform:scaleY(1); }
    50% { opacity:1; transform:scaleY(1.3); }
}

/* ========================================
   PILLARS Section — 三大业务支柱
   ======================================== */
.pillars-grid {
    display:grid; grid-template-columns:repeat(3,1fr); gap:24px; max-width:1040px; margin:0 auto;
}
.pillar-card {
    position:relative; overflow:hidden;
    background:linear-gradient(180deg, #ffffff 0%, #f8fafc 100%);
    border:1px solid var(--c-border);
    border-radius:var(--radius-xl);
    padding:44px 30px 40px;
    text-align:center;
    transition:all .4s cubic-bezier(.4,0,.2,1);
    display:flex; flex-direction:column; align-items:center;
}
.pillar-card::before {
    content:""; position:absolute; top:0; left:0; right:0; height:4px;
}
.pillar-card[data-theme="material"]::before { background:linear-gradient(90deg, var(--c-primary), var(--c-tech-blue)); }
.pillar-card[data-theme="product"]::before  { background:linear-gradient(90deg, var(--c-accent), var(--c-accent-l)); }
.pillar-card[data-theme="software"]::before { background:linear-gradient(90deg, var(--c-layer-s), #9b6fd4); }
.pillar-card::after {
    content:""; position:absolute; top:-50px; right:-50px; width:150px; height:150px; border-radius:50%; opacity:.05;
}
.pillar-card[data-theme="material"]::after { background:var(--c-primary); }
.pillar-card[data-theme="product"]::after  { background:var(--c-accent); }
.pillar-card[data-theme="software"]::after { background:var(--c-layer-s); }
.pillar-card:hover {
    background:#ffffff;
    transform:translateY(-6px);
    box-shadow:0 28px 60px rgba(0,0,0,.1);
    border-color:rgba(26,58,92,.12);
}

/* 图标 */
.pillar-icon {
    width:76px; height:76px; border-radius:50%;
    display:flex; align-items:center; justify-content:center;
    margin-bottom:26px; position:relative; z-index:1;
    transition:all .4s ease;
}
.pillar-card[data-theme="material"] .pillar-icon { background:rgba(26,58,92,.08); color:var(--c-primary); }
.pillar-card[data-theme="product"] .pillar-icon  { background:rgba(26,58,92,.1); color:var(--c-accent); }
.pillar-card[data-theme="software"] .pillar-icon { background:rgba(123,75,186,.1); color:var(--c-layer-s); }
.pillar-card:hover .pillar-icon { transform:scale(1.08); }
.pillar-icon svg { width:36px; height:36px; }

/* 标题行 */
.pillar-head {
    position:relative; z-index:1;
    display:flex; align-items:center; justify-content:center;
    margin-bottom:22px;
}
.pillar-dot { display:none; }
.pillar-code {
    display:inline-flex; align-items:center; justify-content:center;
    width:30px; height:30px; border-radius:7px;
    font-size:.8rem; font-weight:800; letter-spacing:.02em;
    margin-right:10px; flex-shrink:0;
}
.pillar-card[data-theme="material"] .pillar-code { background:rgba(26,58,92,.1); color:var(--c-primary); }
.pillar-card[data-theme="product"] .pillar-code  { background:rgba(26,58,92,.12); color:var(--c-accent); }
.pillar-card[data-theme="software"] .pillar-code { background:rgba(123,75,186,.12); color:var(--c-layer-s); }
.pillar-label {
    font-size:1.32rem; font-weight:700; color:var(--c-text);
    letter-spacing:.02em;
}

/* 关键词行 */
.pillar-items {
    position:relative; z-index:1; width:100%;
    font-size:.9rem; color:var(--c-text-l); font-weight:500;
    line-height:1.8; min-height:3.2em;
    display:flex; align-items:center; justify-content:center;
    margin-bottom:22px; padding-bottom:22px;
    border-bottom:1px solid var(--c-border-l);
}

/* 描述行 */
.pillar-desc {
    position:relative; z-index:1; width:100%;
    font-size:.88rem; color:var(--c-text-ll); font-weight:400;
    line-height:1.7; min-height:3em;
    display:flex; align-items:center; justify-content:center;
    margin-top:auto;
}

/* 了解更多链接 */
.pillar-link {
    position:relative; z-index:1;
    margin-top:18px;
    font-size:.82rem; font-weight:600;
    display:inline-flex; align-items:center; gap:6px;
    transition:all .3s ease; opacity:0; transform:translateY(8px);
}
.pillar-card[data-theme="material"] .pillar-link { color:var(--c-primary); }
.pillar-card[data-theme="product"] .pillar-link  { color:var(--c-accent); }
.pillar-card[data-theme="software"] .pillar-link { color:var(--c-layer-s); }
.pillar-card:hover .pillar-link { opacity:1; transform:translateY(0); }
.pillar-link svg { width:14px; height:14px; }

/* Stats */
.stats-grid { display:grid; grid-template-columns:repeat(4,1fr); gap:20px; margin-top:40px; }
.stat-card {
    text-align:center; padding:36px 20px; background:var(--c-white); border-radius:var(--radius);
    border:1px solid var(--c-border); transition:all var(--t);
}
.stat-card:hover { box-shadow:var(--shadow-md); transform:translateY(-3px); border-color:var(--c-border); }
.stat-num { font-size:clamp(1.8rem,3.5vw,2.8rem); font-weight:800; color:var(--c-primary); margin-bottom:8px; }
.stat-label { font-size:.88rem; color:var(--c-text-l); font-weight:500; }

/* ========================================
   PRODUCT SYSTEM Pages — 产品体系通用样式
   ======================================== */
.page-hero {
    position:relative; min-height:48vh; display:flex; align-items:center;
    padding:100px 0 60px; overflow:hidden;
}
.page-hero-bg.materials { background:linear-gradient(160deg, var(--c-dark) 0%, #1A3A5C 60%, #153250 100%); }
.page-hero-bg.engineering { background:linear-gradient(160deg, var(--c-dark) 0%, #4a2000 60%, #2d1400 100%); }
.page-hero-bg.software { background:linear-gradient(160deg, var(--c-dark) 0%, #2d1950 60%, #1e0e38 100%); }
.page-hero-bg.about { background:linear-gradient(160deg, var(--c-dark) 0%, #1A3A5C 60%, #0c1e33 100%); }

.page-hero-inner { position:relative; z-index:2; max-width:var(--max-w); margin:0 auto; padding:0 24px; }
.page-hero-tag {
    display:inline-block; padding:5px 18px; border-radius:50px;
    font-size:.78rem; font-weight:600; margin-bottom:20px;
}
.page-hero-title { font-size:clamp(1.9rem,4vw,3.2rem); font-weight:700; color:var(--c-white); margin-bottom:20px; line-height:1.35; letter-spacing:.06em; }
.page-hero-sub { font-size:1.05rem; color:rgba(255,255,255,.6); font-weight:300; max-width:700px; line-height:1.7; }

/* — Breadcrumb — */
.breadcrumb { background:var(--c-gray-bg); border-bottom:1px solid var(--c-border); padding:0 24px; }
.breadcrumb-inner {
    max-width:var(--max-w); margin:0 auto; padding:10px 0; display:flex; align-items:center; gap:8px;
    font-size:.8rem; color:var(--c-text-l);
}
.breadcrumb-inner a { color:var(--c-text-l); text-decoration:none; transition:color .2s; }
.breadcrumb-inner a:hover { color:var(--c-primary); }
.breadcrumb-sep { color:var(--c-border); font-size:.75rem; }
.breadcrumb-current { color:var(--c-text); font-weight:500; }

/* — Engineering Hub Cards (Freudenberg-style) — */
.eng-hub-card {
    display:grid; grid-template-columns:280px 1fr; gap:0; background:var(--c-white);
    border:1px solid var(--c-border); border-radius:var(--radius-lg); overflow:hidden;
    margin-bottom:24px; transition:all var(--t); box-shadow:var(--shadow-sm);
}
.eng-hub-card:hover { box-shadow:var(--shadow-lg); transform:translateY(-2px); }
.eng-hub-visual {
    display:flex; align-items:center; justify-content:center; min-height:220px;
    position:relative; overflow:hidden;
}
.eng-hub-visual::after {
    content:''; position:absolute; top:-30%; right:-30%; width:100%; height:100%;
    background:radial-gradient(circle, rgba(255,255,255,.12), transparent 60%); pointer-events:none;
}
.eng-hub-visual-badge {
    font-size:1.4rem; font-weight:800; color:#fff; letter-spacing:.04em;
    position:relative; z-index:1; text-align:center; text-shadow:0 2px 12px rgba(0,0,0,.3);
}
.eng-hub-body {
    padding:32px 36px; display:flex; flex-direction:column; gap:12px;
}
.eng-hub-code {
    display:inline-block; padding:3px 12px; border-radius:50px;
    font-size:.75rem; font-weight:700; letter-spacing:.04em; width:fit-content;
    color:var(--c-layer-e); background:rgba(26,58,92,.08);
}
.eng-hub-body h3 { font-size:1.35rem; font-weight:700; color:var(--c-dark); margin:0; }
.eng-hub-desc { font-size:.9rem; color:var(--c-text-l); line-height:1.7; margin:0; }
.eng-hub-stats { display:flex; gap:28px; padding:14px 0; border-top:1px solid var(--c-border); border-bottom:1px solid var(--c-border); }
.eng-hub-stat { display:flex; flex-direction:column; gap:2px; }
.eng-hub-stat strong { font-size:1.2rem; font-weight:700; color:var(--c-dark); }
.eng-hub-stat span { font-size:.75rem; color:var(--c-text-l); }
.eng-hub-cta {
    display:inline-flex; align-items:center; gap:6px; font-size:.9rem; font-weight:600;
    color:var(--c-layer-e); text-decoration:none; width:fit-content; transition:gap .2s;
    padding:10px 0;
}
.eng-hub-cta:hover { gap:12px; color:var(--c-accent); }

/* Product Grid */
.product-grid { display:grid; grid-template-columns:repeat(2,1fr); gap:20px; }
.product-card {
    background:var(--c-white); border:1px solid var(--c-border); border-radius:var(--radius-lg);
    padding:32px; transition:all var(--t); display:flex; flex-direction:column; gap:12px;
}
.product-card:hover { box-shadow:var(--shadow-lg); transform:translateY(-4px); }
.product-card-tag {
    display:inline-block; padding:3px 12px; border-radius:50px;
    font-size:.75rem; font-weight:700; letter-spacing:.04em; width:fit-content;
}
.tag-m { color:var(--c-layer-m); background:rgba(26,58,92,.08); }
.tag-e { color:var(--c-layer-e); background:rgba(26,58,92,.08); }
.tag-s { color:var(--c-layer-s); background:rgba(123,75,186,.08); }

.product-card-name { font-size:1.15rem; font-weight:700; color:var(--c-text); }
.product-card-desc { font-size:.9rem; color:var(--c-text-l); line-height:1.6; flex:1; }

/* Clickable product card link */
.product-card-link {
    cursor:pointer; text-decoration:none; color:inherit;
    outline:none;
}
.product-card-link .product-card-more {
    display:inline-flex; align-items:center; gap:6px;
    font-size:.85rem; font-weight:600; color:var(--c-layer-s);
    margin-top:auto; padding-top:8px;
    transition:gap var(--t);
}
.product-card-link:hover .product-card-more { gap:10px; }
.product-card-link:has(.tag-m) .product-card-more { color:var(--c-layer-m); }
.product-card-link:has(.tag-e) .product-card-more { color:var(--c-layer-e); }
.product-card-link:has(.tag-s) .product-card-more { color:var(--c-layer-s); }

/* Keywords */
/* Positioning Statement */
.positioning-bar {
    text-align:center; margin-top:40px;
    padding:36px 32px; background:var(--c-white); border:1px solid var(--c-border); border-radius:var(--radius-lg);
}
.positioning-text {
    font-size:1.15rem; font-weight:500; color:var(--c-text); line-height:1.7;
    letter-spacing:.03em; margin:0;
}

/* Tech Specs Table */
.tech-table {
    width:100%; border-collapse:collapse; margin-top:32px;
    background:var(--c-white); border:1px solid var(--c-border); border-radius:var(--radius); overflow:hidden;
}
.tech-table th {
    text-align:left; padding:14px 20px; font-size:.85rem; font-weight:700; color:var(--c-primary);
    background:var(--c-gray-bg); border-bottom:2px solid var(--c-border);
}
.tech-table td { padding:12px 20px; font-size:.88rem; color:var(--c-text-l); border-bottom:1px solid var(--c-border-l); }
.tech-table tr:last-child td { border-bottom:none; }

/* ========================================
   Sub-brand Section
   ======================================== */
.subbrand-block {
    background:var(--c-gray-bg); border-radius:var(--radius-lg); padding:32px 36px;
    margin-bottom:24px; border-left:4px solid var(--c-accent);
}
.subbrand-name { font-size:1.2rem; font-weight:700; color:var(--c-text); margin-bottom:8px; }
.subbrand-name sup { font-size:.65rem; font-weight:600; color:var(--c-accent); margin-left:3px; }
.subbrand-desc { font-size:.9rem; color:var(--c-text-l); line-height:1.65; margin-bottom:16px; }
.subbrand-products { display:flex; flex-wrap:wrap; gap:8px; }
.subbrand-product {
    display:inline-block; padding:6px 14px; font-size:.82rem; font-weight:500;
    background:var(--c-white); border:1px solid var(--c-border); border-radius:50px; color:var(--c-text);
}

/* ========================================
   Brand Showcase
   ======================================== */
.brand-grid { display:grid; grid-template-columns:repeat(4,1fr); gap:20px; }
.brand-grid-5 { grid-template-columns:repeat(5,1fr); }
.brand-card {
    background:var(--c-white); border:1px solid var(--c-border); border-radius:var(--radius-lg);
    padding:36px 24px; text-align:center; transition:all var(--t);
}
.brand-card:hover { box-shadow:var(--shadow-md); transform:translateY(-3px); }
.brand-card-logo { font-size:1.5rem; font-weight:800; color:var(--c-primary); margin-bottom:6px; letter-spacing:.04em; }
.brand-card-logo sup { font-size:.65rem; font-weight:600; color:var(--c-accent); margin-left:2px; }
.brand-card-name { font-size:.85rem; color:var(--c-text-l); margin-bottom:8px; }
.brand-card-tag {
    display:inline-block; padding:2px 10px; background:rgba(26,58,92,.06); border-radius:50px;
    font-size:.72rem; color:var(--c-text-ll);
}

/* ========================================
   Contact Form
   ======================================== */
.contact-layout { display:grid; grid-template-columns:1fr 1fr; gap:56px; align-items:start; }
.contact-items { margin-top:28px; display:flex; flex-direction:column; gap:20px; }
.contact-item { display:flex; gap:14px; align-items:flex-start; }
.contact-icon {
    width:42px; height:42px; display:flex; align-items:center; justify-content:center;
    background:var(--c-white); border-radius:var(--radius-sm); color:var(--c-tech-blue); box-shadow:var(--shadow-sm); flex-shrink:0;
}
.contact-icon svg { width:18px; height:18px; }
.contact-label { font-size:.78rem; color:var(--c-text-ll); margin-bottom:3px; font-weight:500; }
.contact-value { font-size:.92rem; color:var(--c-text); font-weight:500; }

.contact-form {
    background:var(--c-white); border-radius:var(--radius-xl); padding:40px;
    box-shadow:var(--shadow-md); border:1px solid var(--c-border);
}
.form-title { font-size:1.35rem; font-weight:700; color:var(--c-text); margin-bottom:24px; }

.form-group { position:relative; margin-bottom:22px; }
.form-group input,
.form-group select,
.form-group textarea {
    width:100%; padding:13px 16px; border:2px solid var(--c-border);
    border-radius:var(--radius-sm); font-size:.92rem; font-family:var(--font); color:var(--c-text);
    background:var(--c-gray-bg); transition:all var(--t); resize:vertical;
}
.form-group label {
    position:absolute; top:13px; left:16px; font-size:.92rem; color:var(--c-text-ll);
    pointer-events:none; transition:all var(--t); background:var(--c-white); padding:0 5px;
}
.form-group input:focus, .form-group textarea:focus, .form-group select:focus {
    outline:none; border-color:var(--c-tech-blue); background:var(--c-white);
}
.form-group input:focus+label, .form-group input:valid+label,
.form-group textarea:focus+label, .form-group textarea:valid+label,
.form-group select:focus+label, .form-group select:valid+label {
    top:-8px; left:12px; font-size:.73rem; color:var(--c-tech-blue); font-weight:500;
}
.form-group select {
    appearance:none; -webkit-appearance:none;
    background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 24 24' fill='none' stroke='%2364748b' stroke-width='2'%3E%3Cpolyline points='6 9 12 15 18 9'/%3E%3C/svg%3E");
    background-repeat:no-repeat; background-position:right 14px center; padding-right:36px;
}
.form-note { font-size:.78rem; color:var(--c-text-ll); margin-top:10px; text-align:center; }

/* ---- Contact One-Page Card ---- */
.contact-hero-page {
    min-height:calc(100vh - 200px);
    padding:80px 0 0;
    display:flex;
    align-items:center;
    background:var(--c-white);
}
.contact-hero-page .page-hero-bg { display:none; }
.contact-hero-inner { width:100%; max-width:var(--max-w); margin:0 auto; padding:0; }
.contact-onepage-card {
    display:grid;
    grid-template-columns:0.9fr 1.1fr;
    background:var(--c-white);
    border-radius:0;
    overflow:hidden;
    box-shadow:none;
    border:none;
    min-height:540px;
    width:100%;
    margin:0;
}
.contact-onepage-left {
    background:linear-gradient(160deg, var(--c-dark) 0%, #1A3A5C 70%, var(--c-dark) 100%);
    padding:52px 44px;
    color:var(--c-white);
    display:flex;
    flex-direction:column;
    justify-content:center;
}
.contact-onepage-left .page-hero-title { margin-bottom:12px; }
.contact-onepage-left .page-hero-sub { margin-bottom:34px; color:rgba(255,255,255,.62); }
.contact-onepage-info { display:flex; flex-direction:column; gap:16px; margin-bottom:30px; }
.contact-onepage-item { display:flex; gap:14px; align-items:flex-start; }
.contact-onepage-icon {
    width:40px; height:40px; display:flex; align-items:center; justify-content:center;
    background:rgba(255,255,255,.1); border-radius:var(--radius-sm); color:var(--c-white);
    flex-shrink:0;
}
.contact-onepage-icon svg { width:18px; height:18px; }
.contact-onepage-label { font-size:.75rem; color:rgba(255,255,255,.5); margin-bottom:2px; font-weight:500; }
.contact-onepage-value { font-size:.9rem; color:rgba(255,255,255,.9); font-weight:500; }
.contact-onepage-tags { display:flex; flex-wrap:wrap; gap:8px; }
.contact-onepage-tags span {
    padding:6px 13px; background:rgba(255,255,255,.1); border:1px solid rgba(255,255,255,.15);
    border-radius:50px; font-size:.77rem; color:rgba(255,255,255,.78);
}
.contact-onepage-right {
    padding:52px 44px;
    overflow-y:auto;
    background:var(--c-white);
    color:var(--c-text);
}
.contact-onepage-right .form-title { margin-bottom:28px; font-size:1.25rem; color:var(--c-text); font-weight:600; }
.contact-onepage-right .form-group { margin-bottom:20px; position:relative; display:flex; flex-direction:column-reverse; }
.contact-onepage-right .form-row {
    display:grid; grid-template-columns:1fr 1fr; gap:20px;
}
.contact-onepage-right .form-group label {
    position:static;
    display:block;
    font-size:.78rem;
    color:var(--c-text-l);
    margin-bottom:6px;
    font-weight:500;
    transform:none;
    pointer-events:auto;
    background:transparent;
}
.contact-onepage-right .form-group input,
.contact-onepage-right .form-group select,
.contact-onepage-right .form-group textarea {
    width:100%;
    padding:11px 14px;
    font-size:.9rem;
    background:var(--c-gray-bg) !important;
    border:1px solid var(--c-border);
    border-radius:var(--radius-sm);
    color:var(--c-text);
    -webkit-appearance:none;
    -moz-appearance:none;
    appearance:none;
    box-shadow:none;
    transition:border-color var(--t);
}
.contact-onepage-right .form-group input:-webkit-autofill,
.contact-onepage-right .form-group input:-webkit-autofill:hover,
.contact-onepage-right .form-group input:-webkit-autofill:focus,
.contact-onepage-right .form-group textarea:-webkit-autofill,
.contact-onepage-right .form-group textarea:-webkit-autofill:hover,
.contact-onepage-right .form-group textarea:-webkit-autofill:focus,
.contact-onepage-right .form-group select:-webkit-autofill,
.contact-onepage-right .form-group select:-webkit-autofill:hover,
.contact-onepage-right .form-group select:-webkit-autofill:focus {
    -webkit-text-fill-color:var(--c-text) !important;
    -webkit-box-shadow:0 0 0px 1000px var(--c-gray-bg) inset !important;
    transition:background-color 5000s ease-in-out 0s;
}
.contact-onepage-right .form-group input::placeholder,
.contact-onepage-right .form-group textarea::placeholder { color:var(--c-text-ll); }
.contact-onepage-right .form-group input:focus,
.contact-onepage-right .form-group select:focus,
.contact-onepage-right .form-group textarea:focus {
    outline:none;
    border-color:var(--c-primary);
}
.contact-onepage-right .form-group input:focus+label,
.contact-onepage-right .form-group input:valid+label,
.contact-onepage-right .form-group textarea:focus+label,
.contact-onepage-right .form-group textarea:valid+label,
.contact-onepage-right .form-group select:focus+label,
.contact-onepage-right .form-group select:valid+label {
    position:static;
    transform:none;
    top:auto; left:auto;
    font-size:.78rem;
    color:var(--c-primary);
}
.contact-onepage-right .form-group select {
    appearance:none; -webkit-appearance:none;
    background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 24 24' fill='none' stroke='%2364748b' stroke-width='2'%3E%3Cpolyline points='6 9 12 15 18 9'/%3E%3C/svg%3E");
    background-repeat:no-repeat; background-position:right 14px center; padding-right:32px;
}
.contact-onepage-right .form-group select option { background:var(--c-white); color:var(--c-text); }
.contact-onepage-right .btn-full {
    width:100%;
    padding:13px 24px;
    background:var(--c-accent);
    color:var(--c-white);
    border:none;
    border-radius:var(--radius-sm);
    transition:all var(--t);
    cursor:pointer;
    font-size:.93rem; font-weight:600;
}
.contact-onepage-right .btn-full:hover {
    background:var(--c-accent-d);
    color:var(--c-white);
}
.contact-onepage-right .form-note { color:var(--c-text-l); text-align:left; margin-top:12px; font-size:.75rem; }
.contact-onepage-right .form-note { color:rgba(255,255,255,.45); text-align:left; margin-top:10px; font-size:.75rem; }

/* ========================================
   News
   ======================================== */
.news-grid { display:grid; grid-template-columns:repeat(3,1fr); gap:20px; align-items:stretch; margin-bottom:40px; }
.news-card {
    background:var(--c-white); border-radius:var(--radius-lg); overflow:hidden;
    border:1px solid var(--c-border); transition:all var(--t); cursor:pointer;
    display:flex; flex-direction:column; height:100%;
}
.news-card:hover { box-shadow:var(--shadow-lg); transform:translateY(-4px); }
.news-img { position:relative; overflow:hidden; aspect-ratio:16/10; flex-shrink:0; }
.news-img-bg { width:100%; height:100%; display:flex; align-items:center; justify-content:center; transition:transform .5s ease; }
.news-card:hover .news-img-bg { transform:scale(1.05); }
.news-img-bg.c1 { background:linear-gradient(135deg, #1A3A5C, #264f7a); }
.news-img-bg.c2 { background:linear-gradient(135deg, #E8752A, #f0974a); }
.news-img-bg.c3 { background:linear-gradient(135deg, #7B4BBA, #9b6fd4); }
.news-img-text { font-size:2.2rem; font-weight:800; color:rgba(255,255,255,.15); letter-spacing:.1em; }
.news-cat {
    position:absolute; top:14px; left:14px; padding:4px 14px; background:rgba(255,255,255,.95);
    border-radius:50px; font-size:.75rem; font-weight:600; color:var(--c-primary); backdrop-filter:blur(10px);
}
.news-body { padding:22px; display:flex; flex-direction:column; flex:1; }
.news-date { font-size:.8rem; color:var(--c-text-ll); margin-bottom:8px; font-weight:500; }
.news-title { font-size:1.05rem; font-weight:600; color:var(--c-text); line-height:1.4; margin-bottom:10px; transition:color var(--t); }
.news-card:hover .news-title { color:var(--c-tech-blue); }
.news-excerpt { font-size:.88rem; color:var(--c-text-l); line-height:1.55; margin-bottom:14px; display:-webkit-box; -webkit-line-clamp:3; -webkit-box-orient:vertical; overflow:hidden; flex:1; }
.news-link { font-size:.85rem; font-weight:600; color:var(--c-tech-blue); transition:all var(--t); margin-top:auto; }
.news-link:hover { color:var(--c-accent); }
.news-more { text-align:center; }

/* ========================================
   Careers
   ======================================== */
.careers-bg { position:absolute; inset:0; background:radial-gradient(ellipse at 30% 40%, rgba(26,58,92,.08) 0%, transparent 55%), radial-gradient(ellipse at 70% 60%, rgba(26,58,92,.1) 0%, transparent 55%); }
.careers-content { position:relative; z-index:1; max-width:720px; margin:0 auto; text-align:center; }
.careers-content .section-label-l { margin-bottom:18px; }
.careers-content .section-title-l { margin-bottom:28px; }
.careers-desc {
    font-size:1.02rem; color:rgba(255,255,255,.72); line-height:1.85;
    margin-bottom:32px; max-width:640px; margin-left:auto; margin-right:auto;
    font-weight:400;
}
.careers-hl {
    position:relative;
    font-size:1.12rem; color:rgba(255,255,255,.88); font-weight:400;
    margin-bottom:42px; font-style:normal; line-height:1.75;
    padding:20px 28px; background:rgba(255,255,255,.04);
    border-left:3px solid var(--c-accent); border-radius:0 12px 12px 0;
    display:inline-block; text-align:left; max-width:640px;
}
.careers-hl::before {
    content:"“"; position:absolute; top:-8px; left:16px; font-size:3.2rem;
    color:var(--c-accent); opacity:.25; line-height:1; font-family:Georgia, serif;
}
.careers-hl .hl { color:var(--c-accent-l); font-weight:500; }
.careers-cta { display:flex; gap:18px; justify-content:center; flex-wrap:wrap; }
.careers-cta .btn { padding:14px 34px; font-size:.95rem; }
.careers-cta .btn-outline-l { border-color:rgba(255,255,255,.35); color:rgba(255,255,255,.92); }
.careers-cta .btn-outline-l:hover { background:rgba(255,255,255,.1); border-color:rgba(255,255,255,.65); }

/* ========================================
   ABOUT Page
   ======================================== */
.about-block { margin-bottom:48px; max-width:680px; margin-left:auto; margin-right:auto; text-align:center; }
.about-block:last-child { margin-bottom:0; }
.about-block h3 { font-size:1.25rem; font-weight:700; color:var(--c-text); margin-bottom:20px; }
.about-block h3 .dot { width:8px; height:8px; border-radius:50%; display:inline-block; }
.about-block h3 .dot.m { background:var(--c-layer-m); }
.about-block h3 .dot.e { background:var(--c-layer-e); }
.about-block h3 .dot.s { background:var(--c-layer-s); }
.about-block p { font-size:1rem; color:var(--c-text-l); line-height:1.9; margin-bottom:0; }
.about-list { display:flex; flex-direction:column; gap:8px; margin-top:8px; }
.about-list li { font-size:.9rem; color:var(--c-text-l); padding-left:20px; position:relative; }
.about-list li::before { content:'•'; position:absolute; left:6px; color:var(--c-accent); font-weight:700; }

.timeline { position:relative; padding-left:28px; }
.timeline::before { content:''; position:absolute; left:8px; top:4px; bottom:4px; width:2px; background:var(--c-border); }
.timeline-item { margin-bottom:24px; position:relative; }
.timeline-item::before { content:''; position:absolute; left:-24px; top:6px; width:10px; height:10px; border-radius:50%; background:var(--c-accent); border:2px solid var(--c-white); box-shadow:0 0 0 2px var(--c-accent); }
.timeline-year { font-size:.8rem; font-weight:700; color:var(--c-accent); margin-bottom:4px; }
.timeline-text { font-size:.9rem; color:var(--c-text-l); }

/* ========================================
   News Center Timeline — Google风格：简洁、留白、无装饰线
   ======================================== */
.news-timeline { max-width:760px; margin:0 auto; }
.news-item {
    display:grid; grid-template-columns:88px 1fr; gap:28px;
    background:transparent;
    border:none;
    padding:28px 0;
}
.news-item+.news-item {
    border-top:1px solid var(--c-border-l);
}
.news-item-date {
    font-size:.82rem; font-weight:400; color:var(--c-text-l);
    padding-top:4px; white-space:nowrap;
}
.news-item-body { min-width:0; }
.news-item-tag {
    display:inline-block; padding:3px 10px; border-radius:6px; font-size:.72rem;
    font-weight:500; margin-bottom:8px;
}
.news-item-tag.tag-product  { background:rgba(123,75,186,.08); color:#7b4bba; }
.news-item-tag.tag-tech     { background:rgba(26,58,92,.08);  color:var(--c-primary); }
.news-item-tag.tag-group    { background:rgba(14,165,150,.08); color:#0ea596; }
.news-item-tag.tag-policy   { background:rgba(26,58,92,.08); color:#e8752a; }
.news-item-tag.tag-brand    { background:rgba(59,130,246,.08); color:#3b82f6; }
.news-item-title {
    font-size:1.05rem; font-weight:600; color:var(--c-text); line-height:1.45;
    margin-bottom:6px;
}
.news-item:hover .news-item-title { color:var(--c-primary); }
.news-item-desc {
    font-size:.88rem; color:var(--c-text-l); line-height:1.65;
}
.news-item-link {
    font-size:.82rem; font-weight:500; color:var(--c-text-l); margin-top:8px;
    display:inline-block; transition:color var(--t);
}
.news-item-link:hover { color:var(--c-primary); }

@media (max-width:768px) {
    .news-item { grid-template-columns:1fr; gap:6px; padding:20px 0; }
    .news-item-date { font-size:.78rem; }
}

/* ========================================
   Footer
   ======================================== */
.footer { background:var(--c-dark); color:var(--c-footer-text); padding:60px 0 0; }
.footer-top { display:grid; grid-template-columns:1.5fr 2fr; gap:40px; padding-bottom:40px; border-bottom:1px solid rgba(255,255,255,.08); }
.footer-brand { display:flex; flex-direction:column; gap:12px; }
.footer-logo { font-size:1.5rem; font-weight:900; color:var(--c-white); display:inline-block; }
.footer-tagline { font-size:.9rem; color:var(--c-accent-l); font-weight:500; }
.footer-desc { font-size:.85rem; line-height:1.6; max-width:340px; }
.footer-links { display:grid; grid-template-columns:repeat(3,1fr); gap:24px; }
.footer-col h4 { font-size:.88rem; font-weight:600; color:var(--c-white); margin-bottom:14px; }
.footer-col ul li { margin-bottom:8px; }
.footer-col ul li a { font-size:.85rem; color:rgba(255,255,255,.5); transition:color var(--t); }
.footer-col ul li a:hover { color:var(--c-tech-blue-l); }
.footer-bottom { display:flex; align-items:center; justify-content:space-between; padding:22px 0; font-size:.82rem; }
.footer-social { display:flex; gap:10px; }
.footer-social a {
    width:34px; height:34px; display:flex; align-items:center; justify-content:center;
    background:rgba(255,255,255,.06); border-radius:50%; color:rgba(255,255,255,.5); transition:all var(--t);
}
.footer-social a:hover { background:var(--c-accent); color:var(--c-white); }

/* ========================================
   Back to Top
   ======================================== */
.back-to-top {
    position:fixed; bottom:28px; right:28px; width:44px; height:44px; display:flex;
    align-items:center; justify-content:center; background:var(--c-tech-blue); color:var(--c-white);
    border:none; border-radius:50%; cursor:pointer; box-shadow:var(--shadow-md);
    opacity:0; visibility:hidden; transform:translateY(16px); transition:all var(--t); z-index:999;
}
.back-to-top.show { opacity:1; visibility:visible; transform:translateY(0); }
.back-to-top:hover { background:var(--c-accent); transform:translateY(-3px); }
.back-to-top svg { width:20px; height:20px; }

/* ========================================
   REVEAL Animation
   ======================================== */
.reveal { opacity:0; transform:translateY(36px); transition:opacity .7s ease, transform .7s ease; transition-delay:var(--delay, 0s); }
.reveal.visible { opacity:1; transform:translateY(0); }


/* — Search — */
.nav-search-btn {
    background:none; border:none; cursor:pointer; padding:6px; display:flex; align-items:center; justify-content:center;
    color:var(--c-text-l); transition:color .2s;
}
.nav-search-btn:hover { color:var(--c-primary); }
.nav-search-btn svg { width:18px; height:18px; }
.search-overlay {
    display:none; position:fixed; inset:0; z-index:9999; background:rgba(0,0,0,.6); backdrop-filter:blur(6px);
}
.search-overlay.active { display:flex; align-items:flex-start; justify-content:center; padding-top:12vh; }
.search-overlay-inner {
    width:100%; max-width:640px; background:var(--c-white); border-radius:var(--radius-lg);
    box-shadow:0 20px 60px rgba(0,0,0,.25); overflow:hidden; margin:0 20px;
}
.search-overlay-close-btn {
    position:absolute; top:20px; right:24px; background:none; border:none; cursor:pointer;
    color:rgba(255,255,255,.5); font-size:2rem; line-height:1; z-index:10000; transition:color .2s;
}
.search-overlay-close-btn:hover { color:#fff; }
.search-overlay .pagefind-ui { width:100%; }
.search-overlay .pagefind-ui__search-input {
    width:100% !important; padding:22px 24px !important; font-size:1.15rem !important;
    border:none !important; border-bottom:2px solid var(--c-primary) !important; border-radius:0 !important;
    outline:none !important; font-family:inherit !important; box-sizing:border-box !important; background:var(--c-white);
}
.search-overlay .pagefind-ui__results { max-height:55vh; overflow-y:auto; padding:0 24px 24px; }
.search-overlay .pagefind-ui__result { padding:18px 0; border-bottom:1px solid var(--c-border); }
.search-overlay .pagefind-ui__result:last-child { border-bottom:none; }
.search-overlay .pagefind-ui__result-title { font-size:.95rem; font-weight:600; color:var(--c-dark); text-decoration:none; margin-bottom:6px; display:block; }
.search-overlay .pagefind-ui__result-title:hover { color:var(--c-accent); }
.search-overlay .pagefind-ui__result-excerpt { font-size:.82rem; color:var(--c-text-l); line-height:1.5; }
.search-overlay .pagefind-ui__result-excerpt mark { background:rgba(246,209,82,.35); color:var(--c-dark); padding:1px 3px; border-radius:2px; }
.search-overlay .pagefind-ui__search-clear { background:none; border:none; cursor:pointer; padding:4px; color:var(--c-text-l); }
.search-overlay .pagefind-ui__drawer { display:none !important; }
@media (max-width:768px) {
    .search-overlay-inner { max-width:100%; margin:0 12px; }
    .search-overlay { padding-top:8vh; }
}

/* ========================================
   RESPONSIVE
   ======================================== */
@media (max-width:1024px) {
    .nav-menu {
        position:fixed; top:68px; left:0; right:0; flex-direction:column;
        background:var(--c-white); padding:20px; gap:6px; box-shadow:var(--shadow-lg);
        transform:translateY(-150%); transition:transform var(--t); max-height:calc(100vh-68px); overflow-y:auto;
    }
    .nav-menu.active { transform:translateY(0); }
    .nav-link { width:100%; padding:12px 16px; }
    .nav-cta { margin-top:6px; }
    .hamburger { display:flex; }
    .lang-btn { display:none; }

    .scene-cards { grid-template-columns:repeat(2,1fr); gap:16px; }
    .scene-card { padding:30px 18px 26px; }
    .scene-icon { width:64px; height:64px; }
    .scene-icon svg { width:32px; height:32px; }
    .scene-label { font-size:.95rem; }
    .pillars-grid { grid-template-columns:1fr 1fr; gap:20px; }
    .pillar-card { padding:40px 24px 36px; }
    .pillar-icon { width:64px; height:64px; }
    .pillar-icon svg { width:30px; height:30px; }
    .pillar-label { font-size:1.2rem; }
    .arch-layer { grid-template-columns:1fr; gap:12px; }
    .product-grid { grid-template-columns:1fr 1fr; }
    .brand-grid { grid-template-columns:repeat(2,1fr); }
    .news-grid { grid-template-columns:1fr 1fr; }
    .news-card-feat { grid-column:span 1; }
    .contact-layout { grid-template-columns:1fr; gap:40px; }
    .contact-onepage-left { padding:36px 32px; }
    .contact-onepage-right { padding:32px; max-height:520px; }
    .footer-top { grid-template-columns:1fr; }
    .stats-grid { grid-template-columns:repeat(2,1fr); }
    .eng-hub-card { grid-template-columns:200px 1fr; }
    .eng-hub-body { padding:24px 28px; }
}

@media (max-width:768px) {
    .section { padding:64px 0; }
    .container { padding:0 18px; }
    .section-header { margin-bottom:40px; }
    .scene-cards { grid-template-columns:1fr 1fr; gap:12px; }
    .scene-card { padding:26px 14px 22px; gap:12px; }
    .scene-icon { width:54px; height:54px; }
    .scene-icon svg { width:28px; height:28px; }
    .scene-label { font-size:.86rem; }
    .product-grid { grid-template-columns:1fr; }
    .brand-grid { grid-template-columns:1fr 1fr; }
    .news-grid { grid-template-columns:1fr; }
    .news-card-feat { grid-column:span 1; }
    .stats-grid { grid-template-columns:repeat(2,1fr); }
    .stat-card { padding:24px 14px; }
    .footer-links { grid-template-columns:repeat(2,1fr); }
    .footer-bottom { flex-direction:column; gap:14px; text-align:center; }
    .contact-form { padding:28px 20px; }
    .contact-hero-page { padding:90px 0 30px; }
    .contact-onepage-left { padding:28px 22px; }
    .contact-onepage-right { padding:26px 22px; max-height:none; }
    .contact-onepage-right .form-row { grid-template-columns:1fr; gap:0; }
    .hero-scroll { display:none; }
    .careers-cta { flex-direction:column; width:100%; }
    .careers-cta .btn { width:100%; }
}

@media (max-width:480px) {
    .scene-cards { grid-template-columns:1fr 1fr; gap:10px; }
    .pillars-grid { grid-template-columns:1fr; gap:18px; }
    .pillar-card { padding:36px 24px 32px; }
    .pillar-icon { width:56px; height:56px; margin-bottom:20px; }
    .pillar-icon svg { width:26px; height:26px; }
    .pillar-label { font-size:1.1rem; }
    .scene-card { padding:22px 10px 18px; gap:10px; }
    .scene-icon { width:48px; height:48px; }
    .scene-icon svg { width:26px; height:26px; }
    .scene-label { font-size:.78rem; }
    .brand-grid { grid-template-columns:1fr; }
    .stats-grid { grid-template-columns:1fr; }
    .footer-links { grid-template-columns:1fr; }
    .eng-hub-card { grid-template-columns:1fr; }
    .eng-hub-visual { min-height:140px; }
    .eng-hub-body { padding:20px 22px; }
    .eng-hub-stats { gap:18px; flex-wrap:wrap; }
    .hero-title, .page-hero-title, .s6-hero-title { font-size:1.8rem; }
    .arch-layer { padding:20px 22px; }
    .page-hero { min-height:36vh; padding:90px 0 40px; }
    .positioning-bar { padding:24px; }
    .back-to-top { bottom:16px; right:16px; }
}

/* ========================================
   Brand Logos
   ======================================== */
.brand-logo-img {
    height:24px; width:auto; max-width:100%; object-fit:contain;
    display:block; margin:0 auto 8px;
}
.brand-logo-img.larger { height:34px !important; }
.brand-logo-img.small { height:20px; }

.brand-logo-hero {
    height:28px; width:auto; max-width:120px; object-fit:contain;
    display:block; margin-bottom:12px; filter:brightness(1.05);
}

.brand-logo-inline {
    height:22px; width:auto; vertical-align:middle;
    display:inline-block; margin-right:6px;
}

.brand-logo-wrap {
    display:inline-flex; align-items:center; justify-content:center;
    padding:6px 10px; background:var(--c-white); border-radius:var(--radius-md);
    box-shadow:var(--shadow-sm); margin-bottom:10px;
}
.brand-logo-wrap .brand-logo-img { margin:0; height:20px; }
.brand-logo-wrap.dark { background:rgba(0,0,0,.25); }

.brand-matrix {
    display:grid; grid-template-columns:repeat(4,1fr); gap:22px; margin-top:48px;
}
.brand-matrix-card {
    position:relative;
    background:var(--c-white); border:1px solid var(--c-border); border-radius:var(--radius-xl);
    padding:36px 0 32px; text-align:center; transition:all .4s cubic-bezier(.4,0,.2,1);
    overflow:hidden; display:flex; flex-direction:column; align-items:center; justify-content:center;
    cursor:default; min-height:160px;
}
.brand-matrix-card:hover {
    box-shadow:0 18px 46px rgba(0,0,0,.08); transform:translateY(-5px);
    border-color:rgba(26,58,92,.15);
}
.brand-matrix-card::before {
    content:""; position:absolute; top:0; left:0; right:0; height:4px;
    background:var(--brand-color, var(--c-primary));
}
.brand-matrix-card[data-brand="ainitt"]      { --brand-color:#1A3A5C; }
.brand-matrix-card[data-brand="jicai"]       { --brand-color:#7B4BBA; }
.brand-matrix-card[data-brand="aiindustry"]  { --brand-color:#5B3EC1; }
.brand-matrix-card[data-brand="yiran"]       { --brand-color:#E5A800; }

/* AINITT 品牌矩阵 Logo 尺寸微调，与其他品牌保持视觉均衡 */
.brand-matrix-card[data-brand="ainitt"] .brand-matrix-logo img { max-width:48%; max-height:38px; }

/* Logo 统一容器 */
.brand-matrix-logo {
    width:100%; height:56px; display:flex; align-items:center; justify-content:center;
    margin-bottom:14px; padding:0 18px;
}
.brand-matrix-logo img {
    max-height:100%; max-width:100%; width:auto; height:auto; object-fit:contain;
    display:block;
}

.brand-matrix-card .brand-matrix-name {
    font-size:1.08rem; font-weight:700; color:var(--c-text);
    letter-spacing:.02em;
}
.brand-matrix-card .brand-matrix-name sup {
    font-size:.55rem; font-weight:600; color:var(--c-accent); margin-left:1px; vertical-align:super;
}

.subbrand-logo-row {
    display:flex; align-items:center; gap:8px; margin-bottom:8px; flex-wrap:wrap;
}
.subbrand-logo-row .brand-logo-img { width:90px; height:42px; object-fit:contain; margin:0; }

.brand-card-logo-img {
    height:26px; width:auto; max-width:100%; object-fit:contain;
    display:block; margin:0 auto 8px;
}

@media (max-width:768px) {
    .brand-matrix { grid-template-columns:repeat(2,1fr); gap:16px; }
    .brand-grid-5 { grid-template-columns:repeat(2,1fr); }
    .brand-logo-hero { height:24px; }
    .brand-logo-img { height:22px; }
    .brand-logo-img.larger { height:26px; }
    .subbrand-logo-row .brand-logo-img { width:70px; height:34px; }
}

@media (max-width:480px) {
    .brand-matrix { grid-template-columns:1fr 1fr; gap:12px; }
    .brand-matrix-card { padding:24px 0; min-height:130px; }
    .brand-matrix-logo { height:48px; margin-bottom:10px; }
    .brand-matrix-card .brand-matrix-name { font-size:.95rem; }
}

@media print {
    .navbar, .back-to-top, .hero-scroll, .hero-particles { display:none; }
}


/* ========================================
   Trust Zone — 信任背书
   ======================================== */
.trust-grid {
    display:grid; grid-template-columns:repeat(4,1fr); gap:24px; margin-top:32px;
}
.trust-item {
    background:var(--c-white); border:1px solid var(--c-border);
    border-radius:var(--radius-xl); padding:36px 24px; text-align:center;
    transition:all .35s cubic-bezier(.4,0,.2,1);
}
.trust-item:hover {
    box-shadow:0 12px 32px rgba(0,0,0,.06); transform:translateY(-2px);
}
.trust-num {
    font-size:2.4rem; font-weight:800; color:var(--c-primary);
    letter-spacing:-.02em; line-height:1.1; margin-bottom:10px;
}
.trust-label {
    font-size:.92rem; font-weight:600; color:var(--c-text); margin-bottom:8px;
}
.trust-desc {
    font-size:.78rem; color:var(--c-text-ll); line-height:1.6;
}
@media (max-width:768px) {
    .trust-grid { grid-template-columns:repeat(2,1fr); gap:16px; }
    .trust-item { padding:28px 18px; }
    .trust-num { font-size:2rem; }
}
@media (max-width:480px) {
    .trust-grid { grid-template-columns:1fr; }
}

/* ========================================
   Positioning Bar — 定位语（替代关键词标签）
   ======================================== */
.positioning-bar {
    text-align:center; padding:40px 32px;
    background:var(--c-white); border:1px solid var(--c-border);
    border-radius:var(--radius-xl);
}
.positioning-text {
    font-size:1.15rem; font-weight:500; color:var(--c-text);
    letter-spacing:.03em; line-height:1.7; margin:0;
}
@media (max-width:768px) {
    .positioning-bar { padding:28px 20px; }
    .positioning-text { font-size:1.02rem; }
}


/* ========================================
   S6 Product Page — Industrial AI Inspection Robot
   ======================================== */

/* Hero with monitor mockup */
.s6-hero { min-height:70vh; display:flex; align-items:center; padding:120px 0 80px; position:relative; overflow:hidden; }
.s6-hero-layout {
    max-width:var(--max-w); margin:0 auto; padding:0 24px;
    display:grid; grid-template-columns:1fr 1.15fr; gap:64px; align-items:center;
}
.s6-hero-text { position:relative; z-index:2; }
.s6-hero-tag {
    display:inline-block; padding:5px 16px; border-radius:50px;
    font-size:.78rem; font-weight:600; color:#93c5fd;
    background:rgba(59,130,246,.15); border:1px solid rgba(59,130,246,.25);
    margin-bottom:20px;
}
.s6-hero-title { font-size:clamp(1.9rem,4vw,3.2rem); font-weight:700; color:var(--c-white); line-height:1.35; margin-bottom:20px; letter-spacing:.06em; }
.s6-hero-sub { font-size:1.1rem; color:rgba(255,255,255,.65); line-height:1.75; max-width:560px; margin-bottom:32px; }
.s6-hero-cta { display:flex; gap:16px; flex-wrap:wrap; }

/* Hero media — video poster */
.s6-hero-media { position:relative; z-index:2; }
.s6-video-poster {
    position:relative; border-radius:var(--radius-xl); overflow:hidden;
    box-shadow:0 32px 80px rgba(0,0,0,.35);
    border:1px solid rgba(255,255,255,.12);
    cursor:pointer;
}
.s6-video-poster img {
    width:100%; height:auto; display:block; transition:transform .6s ease;
}
.s6-video-poster:hover img { transform:scale(1.03); }
.s6-video-poster::after {
    content:""; position:absolute; inset:0;
    background:linear-gradient(180deg, rgba(10,20,40,.15) 0%, rgba(10,20,40,.35) 100%);
    pointer-events:none;
}
.s6-play-btn {
    position:absolute; top:50%; left:50%; transform:translate(-50%,-50%); z-index:3;
    width:72px; height:72px; border-radius:50%; border:none;
    background:linear-gradient(135deg, #3b82f6 0%, #2563eb 100%);
    color:#fff; cursor:pointer;
    display:flex; align-items:center; justify-content:center;
    box-shadow:0 12px 40px rgba(37,99,235,.45);
    transition:all .3s ease;
}
.s6-play-btn:hover { transform:translate(-50%,-50%) scale(1.1); box-shadow:0 16px 50px rgba(37,99,235,.6); }
.s6-play-btn svg { width:28px; height:28px; margin-left:4px; }

/* video loading spinner */
.s6-video-loading {
    display:none; flex-direction:column; align-items:center; justify-content:center; gap:12px;
    position:absolute; inset:0; z-index:10;
    background:rgba(0,0,0,.6); border-radius:var(--radius-lg);
}
.s6-spinner {
    width:36px; height:36px; border:3px solid rgba(255,255,255,.2); border-top-color:#fff;
    border-radius:50%; animation:s6-spin .8s linear infinite;
}
.s6-loading-text { color:rgba(255,255,255,.8); font-size:.85rem; letter-spacing:.04em; }
@keyframes s6-spin { to { transform:rotate(360deg); } }

.s6-video-caption {
    text-align:center; font-size:.85rem; color:rgba(255,255,255,.5);
    margin-top:14px; letter-spacing:.02em;
}

/* Feature rows — image + text alternating */
.s6-feature-row {
    display:grid; grid-template-columns:1fr 1fr; gap:64px; align-items:center; margin-bottom:80px;
}
.s6-feature-row:last-child { margin-bottom:0; }
.s6-feature-visual {
    position:relative; border-radius:var(--radius-xl); overflow:hidden;
    background:var(--c-gray-bg2); border:1px solid var(--c-border);
    display:flex; align-items:center; justify-content:center;
}
.s6-feature-visual::before {
    content:""; position:absolute; inset:0; background:linear-gradient(135deg, rgba(26,58,92,.04) 0%, transparent 60%);
    pointer-events:none; z-index:1;
}
.s6-feature-visual img {
    width:100%; height:100%; object-fit:cover; display:block;
    transition:transform .6s ease;
}
.s6-feature-row:hover .s6-feature-visual img { transform:scale(1.04); }
.s6-feature-visual svg { width:96px; height:96px; color:var(--c-primary); opacity:.85; }
.s6-feature-text { padding:0 8px; }
.s6-feature-tag {
    display:inline-block; padding:4px 14px; border-radius:50px; font-size:.72rem; font-weight:700;
    color:var(--c-primary); background:rgba(26,58,92,.08); margin-bottom:16px; letter-spacing:.04em;
}
.s6-feature-title { font-size:clamp(1.4rem,2.2vw,1.9rem); font-weight:700; color:var(--c-text); margin-bottom:16px; line-height:1.3; }
.s6-feature-desc { font-size:1rem; color:var(--c-text-l); line-height:1.8; margin-bottom:20px; }
.s6-feature-list { display:flex; flex-direction:column; gap:10px; }
.s6-feature-list li {
    position:relative; padding-left:22px; font-size:.92rem; color:var(--c-text-l); line-height:1.6;
}
.s6-feature-list li::before {
    content:""; position:absolute; left:0; top:9px; width:7px; height:7px; border-radius:50%; background:var(--c-accent);
}

/* Scenario cards with icons */
.s6-scenarios { display:grid; grid-template-columns:repeat(4,1fr); gap:20px; }
.s6-scenario-card {
    background:var(--c-white); border:1px solid var(--c-border); border-radius:var(--radius-xl);
    padding:32px 24px; text-align:center; transition:all .4s ease;
}
.s6-scenario-card:hover { transform:translateY(-5px); box-shadow:var(--shadow-lg); border-color:rgba(26,58,92,.12); }
.s6-scenario-icon {
    width:64px; height:64px; border-radius:50%; display:flex; align-items:center; justify-content:center;
    margin:0 auto 20px; background:rgba(26,58,92,.06); color:var(--c-primary);
}
.s6-scenario-icon svg { width:32px; height:32px; }
.s6-scenario-card[data-theme="semicon"] .s6-scenario-icon { background:rgba(124,111,224,.1); color:#7C6FE0; }
.s6-scenario-card[data-theme="smartmf"] .s6-scenario-icon { background:rgba(74,143,204,.1); color:#4A8FCC; }
.s6-scenario-card[data-theme="newenergy"] .s6-scenario-icon { background:rgba(16,185,129,.1); color:#10B981; }
.s6-scenario-card[data-theme="oilgas"] .s6-scenario-icon { background:rgba(26,58,92,.1); color:#E8752A; }
.s6-scenario-name { font-size:1.05rem; font-weight:700; color:var(--c-text); margin-bottom:10px; }
.s6-scenario-desc { font-size:.85rem; color:var(--c-text-l); line-height:1.65; }

/* Architecture diagram */
.s6-arch {
    display:grid; grid-template-columns:repeat(4,1fr); gap:18px; margin-top:40px;
}
.s6-arch-node {
    position:relative; background:var(--c-white); border:1px solid var(--c-border); border-radius:var(--radius-lg);
    padding:28px 22px; text-align:center; transition:all .35s ease;
}
.s6-arch-node:hover { transform:translateY(-4px); box-shadow:var(--shadow-md); }
.s6-arch-node::after {
    content:"→"; position:absolute; right:-16px; top:50%; transform:translateY(-50%);
    font-size:1.2rem; color:var(--c-text-ll);
}
.s6-arch-node:last-child::after { display:none; }
.s6-arch-num {
    width:36px; height:36px; border-radius:50%; display:flex; align-items:center; justify-content:center;
    margin:0 auto 14px; font-size:.85rem; font-weight:700; color:var(--c-white);
    background:linear-gradient(135deg, var(--c-primary), var(--c-tech-blue));
}
.s6-arch-title { font-size:1rem; font-weight:700; color:var(--c-text); margin-bottom:8px; }
.s6-arch-desc { font-size:.82rem; color:var(--c-text-l); line-height:1.6; }

@media (max-width:1024px) {
    .s6-hero-layout { grid-template-columns:1fr; gap:48px; }
    .s6-hero { padding:110px 0 60px; }
    .s6-hero-media { max-width:680px; margin:0 auto; }
    .s6-feature-row { grid-template-columns:1fr; gap:36px; }
    .s6-feature-row.reverse .s6-feature-visual { order:1; }
    .s6-feature-row.reverse .s6-feature-text { order:2; }
    .s6-scenarios { grid-template-columns:repeat(2,1fr); }
    .s6-arch { grid-template-columns:repeat(2,1fr); }
    .s6-arch-node::after { display:none; }
}

@media (max-width:768px) {
    .s6-video-poster { border-radius:var(--radius-lg); }
    .s6-play-btn { width:56px; height:56px; }
    .s6-play-btn svg { width:22px; height:22px; }
    .s6-feature-visual { min-height:auto; }
    .s6-scenarios { grid-template-columns:1fr 1fr; gap:14px; }
    .s6-scenario-card { padding:24px 16px; }
    .s6-scenario-icon { width:54px; height:54px; }
    .s6-scenario-icon svg { width:26px; height:26px; }
    .s6-arch { grid-template-columns:1fr; gap:14px; }
}


/* ========================================
   ABOUT Page v2 — New Structure
   ======================================== */

/* Hero intro text */
.about-hero-text {
    max-width:720px; margin:24px auto 0; text-align:center;
}
.about-hero-text p {
    font-size:1.05rem; color:rgba(255,255,255,.7); line-height:1.85; margin-bottom:14px;
}
.about-hero-text p:last-child { margin-bottom:0; }

/* Core concept section */
.about-concept {
    max-width:760px; margin:0 auto; text-align:center;
}
.about-concept-lead {
    font-size:1.15rem; font-weight:600; color:var(--c-text); margin:20px 0 16px;
}
.about-concept-text {
    font-size:1.05rem; color:var(--c-text-l); line-height:1.9;
}

/* Three differentiator cards */
.about-diff-grid {
    display:grid; grid-template-columns:repeat(3,1fr); gap:28px; max-width:1040px; margin:0 auto;
}
.about-diff-card {
    background:var(--c-white); border:1px solid var(--c-border); border-radius:var(--radius-xl);
    padding:40px 28px; text-align:center; transition:all .4s cubic-bezier(.4,0,.2,1);
}
.about-diff-card:hover {
    transform:translateY(-6px); box-shadow:0 24px 50px rgba(0,0,0,.08); border-color:rgba(26,58,92,.12);
}
.about-diff-icon {
    width:72px; height:72px; border-radius:50%; margin:0 auto 24px;
    display:flex; align-items:center; justify-content:center;
    background:rgba(26,58,92,.07); color:var(--c-primary); transition:all .4s ease;
}
.about-diff-card:hover .about-diff-icon { transform:scale(1.08); background:rgba(26,58,92,.1); }
.about-diff-icon svg { width:34px; height:34px; }
.about-diff-title {
    font-size:1.15rem; font-weight:700; color:var(--c-text); margin-bottom:14px;
}
.about-diff-desc {
    font-size:.92rem; color:var(--c-text-l); line-height:1.75;
}

/* Team section */
.about-team {
    max-width:760px; margin:0 auto; text-align:center;
}
.about-team-content { margin:24px 0 32px; }
.about-team-content p {
    font-size:1.05rem; color:var(--c-text-l); line-height:1.9; margin-bottom:14px;
}
.about-team-cities {
    display:flex; justify-content:center; gap:16px; flex-wrap:wrap;
}
.about-city {
    padding:8px 24px; border-radius:50px; font-size:.9rem; font-weight:600;
    color:var(--c-primary); background:rgba(26,58,92,.06); border:1px solid rgba(26,58,92,.1);
}

/* Closing CTA section */
.about-cta-section {
    background:linear-gradient(160deg, var(--c-dark) 0%, #1A3A5C 60%, #0c1e33 100%);
    padding:80px 0; text-align:center;
}
.about-cta-inner { max-width:680px; margin:0 auto; }
.about-cta-text {
    font-size:clamp(1.6rem,3vw,2.4rem); font-weight:800; color:#fff; line-height:1.35; margin-bottom:16px;
}
.about-cta-sub {
    font-size:1.05rem; color:rgba(255,255,255,.6); line-height:1.7; margin-bottom:32px;
}
.about-cta-btn {
    display:inline-block; padding:14px 36px; border-radius:50px;
    font-size:.95rem; font-weight:600; color:var(--c-dark); background:#fff;
    transition:all .3s ease; text-decoration:none;
}
.about-cta-btn:hover { transform:translateY(-2px); box-shadow:0 12px 30px rgba(0,0,0,.2); }

@media (max-width:768px) {
    .about-diff-grid { grid-template-columns:1fr; gap:20px; }
    .about-diff-card { padding:32px 24px; }
    .about-diff-icon { width:60px; height:60px; }
    .about-diff-icon svg { width:28px; height:28px; }
    .about-hero-text p { font-size:.95rem; }
    .about-concept-lead { font-size:1.05rem; }
    .about-concept-text { font-size:.95rem; }
    .about-cta-section { padding:56px 0; }
}

/* ========================================
   AIINDUSTRY SEALING — 密封产品线
   配色: 蓝紫系 #534AB7 / #135AC7 / #F8F6FF
   ======================================== */

:root {
    --seal-purple: #534AB7;
    --seal-purple-d: #3C3489;
    --seal-blue: #135AC7;
    --seal-blue-d: #0C447C;
    --seal-bg-light: #F8F6FF;
    --seal-bg-card: #EEEDFE;
    --seal-bg-blue: #E6F1FB;
    --seal-accent: #7F77DD;
}

/* — Hero — */
.seal-hero {
    position:relative; overflow:hidden;
    background:var(--seal-bg-light);
    padding:110px 0 80px; text-align:center;
}
.seal-hero::before {
    content:''; position:absolute; top:-120px; right:-120px;
    width:400px; height:400px; border-radius:50%;
    background:rgba(83,74,183,.04); pointer-events:none;
}
.seal-hero::after {
    content:''; position:absolute; bottom:-80px; left:-100px;
    width:360px; height:360px; border-radius:50%;
    background:rgba(19,90,199,.03); pointer-events:none;
}
.seal-hero-inner { position:relative; z-index:2; max-width:960px; margin:0 auto; padding:0 24px; }
.seal-hero-brand { margin-bottom:28px; }
.seal-hero-brand img { height:40px; width:auto; margin:0 auto; }
.seal-hero-title {
    font-size:clamp(2rem,4vw,3.2rem); font-weight:700;
    color:var(--seal-purple-d); line-height:1.2; margin-bottom:16px;
}
.seal-hero-sub {
    font-size:1.1rem; color:var(--c-text-l); max-width:640px; margin:0 auto 48px;
    line-height:1.7;
}
.seal-hero-pos {
    display:inline-block; font-size:.8rem; font-weight:600; letter-spacing:.06em;
    color:var(--seal-purple); padding:6px 18px;
    background:var(--seal-bg-card); border-radius:50px; margin-bottom:24px;
}

/* — 三大支柱 — */
.seal-pillars {
    display:grid; grid-template-columns:repeat(3,1fr); gap:20px;
    max-width:900px; margin:0 auto;
}
.seal-pillar {
    background:#fff; border-radius:var(--radius-lg); padding:28px 20px;
    text-align:center; border:0.5px solid var(--c-border);
    transition:all var(--t);
}
.seal-pillar:hover { transform:translateY(-3px); box-shadow:var(--shadow-md); }
.seal-pillar-focus {
    background:var(--seal-purple); border-color:var(--seal-purple);
    position:relative;
}
.seal-pillar-focus::after {
    content:'核心优势'; position:absolute; top:10px; right:14px;
    font-size:.68rem; color:rgba(255,255,255,.5); letter-spacing:.04em;
}
.seal-pillar-icon {
    width:52px; height:52px; border-radius:50%; margin:0 auto 14px;
    display:flex; align-items:center; justify-content:center;
    font-size:1.3rem; font-weight:700;
}
.seal-pillar-icon.material { background:var(--seal-bg-card); color:var(--seal-purple); }
.seal-pillar-icon.ai { background:#fff; color:var(--seal-purple); }
.seal-pillar-icon.service { background:var(--seal-bg-blue); color:var(--seal-blue); }
.seal-pillar h3 {
    font-size:1.05rem; font-weight:600; margin-bottom:6px;
    color:var(--c-text);
}
.seal-pillar-focus h3 { color:#fff; }
.seal-pillar p {
    font-size:.85rem; color:var(--c-text-l); line-height:1.6;
}
.seal-pillar-focus p { color:rgba(255,255,255,.75); }

/* — 材料矩阵 — */
.seal-material-wrap {
    max-width:var(--max-w); margin:0 auto; padding:0 24px;
}
.seal-material-group { margin-bottom:18px; }
.seal-material-label {
    display:inline-block; font-size:.78rem; font-weight:600;
    padding:3px 12px; border-radius:4px; margin-bottom:10px;
}
.seal-material-label.elastomer { background:var(--seal-bg-card); color:var(--seal-purple-d); }
.seal-material-label.ptfe { background:var(--seal-bg-blue); color:var(--seal-blue-d); }
.seal-material-label.engineering { background:#FAEEDA; color:#633806; }
.seal-material-tags {
    display:flex; flex-wrap:wrap; gap:8px;
}
.seal-mat-tag {
    font-size:.82rem; padding:5px 14px; border-radius:6px;
    background:#fff; border:0.5px solid var(--c-border);
    color:var(--c-text); font-weight:500; transition:all .2s;
    cursor:default;
}
.seal-mat-tag:hover {
    border-color:var(--seal-purple); color:var(--seal-purple);
    background:var(--seal-bg-light);
}
.seal-material-note {
    text-align:center; font-size:.88rem; color:var(--c-text-l);
    margin-top:20px; padding-top:16px; border-top:0.5px solid var(--c-border);
}

/* — AI 选型 — */
.seal-ai-block {
    max-width:var(--max-w); margin:0 auto; padding:0 24px;
}
.seal-ai-card {
    background:linear-gradient(135deg, var(--seal-purple) 0%, var(--seal-purple-d) 100%);
    border-radius:var(--radius-lg); padding:40px; display:flex; align-items:center;
    gap:32px; color:#fff; position:relative; overflow:hidden;
}
.seal-ai-card::before {
    content:''; position:absolute; top:-40px; right:-40px;
    width:180px; height:180px; border-radius:50%;
    background:rgba(255,255,255,.04); pointer-events:none;
}
.seal-ai-text { flex:1; position:relative; z-index:1; }
.seal-ai-text h3 { font-size:1.4rem; font-weight:700; margin-bottom:8px; }
.seal-ai-text p { font-size:.95rem; color:rgba(255,255,255,.75); line-height:1.7; }
.seal-ai-badge {
    display:inline-flex; align-items:center; gap:6px;
    padding:6px 16px; background:rgba(255,255,255,.12); border-radius:50px;
    font-size:.8rem; font-weight:600; color:rgba(255,255,255,.9); margin-bottom:16px;
}
.seal-ai-btn {
    display:inline-block; margin-top:18px; padding:12px 28px;
    background:#fff; color:var(--seal-purple); border-radius:50px;
    font-size:.9rem; font-weight:600; transition:all var(--t);
}
.seal-ai-btn:hover { transform:translateY(-2px); box-shadow:0 8px 24px rgba(0,0,0,.15); }
.seal-ai-visual {
    width:100px; height:100px; background:rgba(255,255,255,.08);
    border-radius:var(--radius-lg); display:flex; align-items:center;
    justify-content:center; font-size:2.5rem; font-weight:800;
    flex-shrink:0; position:relative; z-index:1;
}

/* — 产品线网格 — */
.seal-products-grid {
    display:grid; grid-template-columns:repeat(5,1fr); gap:10px;
    max-width:var(--max-w); margin:0 auto; padding:0 24px;
}
.seal-prod-card {
    display:flex; flex-direction:column; align-items:center; background:#fff; border:0.5px solid var(--c-border);
    border-radius:var(--radius-md); padding:14px 12px 16px; text-align:center;
    transition:all var(--t); text-decoration:none; color:inherit;
}
.seal-prod-card:hover {
    border-color:var(--seal-purple); transform:translateY(-3px);
    box-shadow:0 8px 24px rgba(83,74,183,.12);
}
.seal-prod-img {
    width:100%; height:90px; margin-bottom:10px;
    display:flex; align-items:center; justify-content:center; overflow:hidden;
}
.seal-prod-img img { max-width:100%; max-height:100%; object-fit:contain; }
.seal-prod-name { font-size:.95rem; font-weight:600; margin-bottom:4px; color:var(--c-text); }
.seal-prod-hint { font-size:.75rem; color:var(--c-text-l); }
.seal-prod-arrow {
    display:inline-block; margin-top:8px; font-size:.7rem;
    color:var(--seal-purple); opacity:0; transform:translateX(-8px);
    transition:all .25s;
}
.seal-prod-card:hover .seal-prod-arrow { opacity:1; transform:translateX(0); }

/* — 行业应用 — */
.seal-industry-grid {
    display:grid; grid-template-columns:repeat(3,1fr); gap:14px;
    max-width:var(--max-w); margin:0 auto; padding:0 24px;
}
.seal-ind-card {
    background:#fff; border:0.5px solid var(--c-border);
    border-radius:var(--radius-md); padding:20px;
    display:flex; align-items:flex-start; gap:14px; transition:all var(--t);
}
.seal-ind-card:hover { border-color:var(--seal-blue); }
.seal-ind-icon {
    width:44px; height:44px; border-radius:10px; flex-shrink:0;
    display:flex; align-items:center; justify-content:center;
    background:var(--seal-bg-blue); color:var(--seal-blue);
    font-size:1.2rem; font-weight:700;
}
.seal-ind-card h4 { font-size:.95rem; font-weight:600; margin-bottom:4px; color:var(--c-text); }
.seal-ind-card p { font-size:.8rem; color:var(--c-text-l); line-height:1.5; }

/* — 4步方法 — */
.seal-method-row {
    display:grid; grid-template-columns:repeat(4,1fr); gap:14px;
    max-width:var(--max-w); margin:0 auto; padding:0 24px;
}
.seal-step {
    text-align:center; padding:24px 16px; background:#fff;
    border:0.5px solid var(--c-border); border-radius:var(--radius-md);
    position:relative;
}
.seal-step + .seal-step::before {
    content:'→'; position:absolute; left:-18px; top:50%; transform:translateY(-50%);
    font-size:1.2rem; color:var(--seal-purple); font-weight:600;
}
.seal-step-num {
    width:40px; height:40px; border-radius:50%;
    background:var(--seal-bg-card); color:var(--seal-purple);
    display:flex; align-items:center; justify-content:center;
    margin:0 auto 12px; font-size:1rem; font-weight:700;
}
.seal-step h4 { font-size:.9rem; font-weight:600; margin-bottom:4px; color:var(--c-text); }
.seal-step p { font-size:.78rem; color:var(--c-text-l); line-height:1.5; }

/* — 子页面通用 — */
.seal-sub-hero {
    background:var(--seal-bg-light); padding:80px 0 60px; text-align:center;
    position:relative; overflow:hidden;
}
.seal-sub-hero::before {
    content:''; position:absolute; top:-100px; right:-80px;
    width:300px; height:300px; border-radius:50%;
    background:rgba(83,74,183,.04); pointer-events:none;
}
.seal-sub-hero h1 { font-size:clamp(1.8rem,3.5vw,2.8rem); font-weight:700; color:var(--seal-purple-d); margin-bottom:12px; }
.seal-sub-hero p { font-size:1rem; color:var(--c-text-l); max-width:560px; margin:0 auto; line-height:1.7; }
.seal-sub-hero-tag {
    display:inline-block; font-size:.75rem; font-weight:600; letter-spacing:.05em;
    color:var(--seal-purple); padding:4px 14px; background:var(--seal-bg-card);
    border-radius:50px; margin-bottom:16px;
}
.seal-sub-visual {
    max-width:720px; margin:0 auto 40px; padding:0 24px; text-align:center;
}
.seal-sub-visual img {
    max-width:100%; max-height:320px; object-fit:contain;
    border-radius:var(--radius-md); background:#fff;
    box-shadow:0 4px 20px rgba(0,0,0,.06);
}

.seal-breadcrumb {
    max-width:var(--max-w); margin:0 auto; padding:16px 24px 0;
}
.seal-breadcrumb a, .seal-breadcrumb span {
    font-size:.82rem; color:var(--c-text-l); text-decoration:none;
}
.seal-breadcrumb a:hover { color:var(--seal-purple); }
.seal-breadcrumb .sep { margin:0 8px; color:var(--c-text-ll); }

.seal-sub-body { max-width:var(--max-w); margin:0 auto; padding:48px 24px 80px; }
.seal-sub-section { margin-bottom:48px; }
.seal-sub-section h2 {
    font-size:1.3rem; font-weight:600; color:var(--c-text);
    margin-bottom:16px; padding-bottom:10px; border-bottom:2px solid var(--seal-bg-card);
}
.seal-sub-section p { font-size:.95rem; color:var(--c-text-l); line-height:1.8; margin-bottom:12px; }
.seal-sub-section ul { padding-left:20px; margin-bottom:12px; }
.seal-sub-section li { font-size:.95rem; color:var(--c-text-l); line-height:1.8; list-style:disc; }
.seal-sub-table { width:100%; border-collapse:collapse; margin:12px 0; }
.seal-sub-table th, .seal-sub-table td {
    padding:10px 16px; font-size:.88rem; border:0.5px solid var(--c-border);
    text-align:left;
}
.seal-sub-table th { background:var(--seal-bg-light); font-weight:600; color:var(--c-text); }
.seal-sub-table td { color:var(--c-text-l); }
.seal-sub-back {
    display:inline-flex; align-items:center; gap:8px; margin-top:40px; padding:12px 24px;
    background:var(--seal-bg-card); color:var(--seal-purple); border-radius:50px;
    font-size:.9rem; font-weight:600; transition:all var(--t); text-decoration:none;
}
.seal-sub-back:hover { background:var(--seal-purple); color:#fff; }
.seal-sub-back svg { width:16px; height:16px; }

/* — 密封页 CTA 表单 — */
.seal-cta { text-align:center; }
.seal-cta h2 { font-size:1.5rem; font-weight:700; color:var(--c-text); margin-bottom:10px; }
.seal-cta p { font-size:.95rem; color:var(--c-text-l); margin-bottom:28px; }
.seal-cta-form {
    max-width:640px; margin:0 auto;
    display:grid; grid-template-columns:1fr 1fr; gap:14px;
}
.seal-cta-form .full { grid-column:1/-1; }
.seal-cta-form input, .seal-cta-form select, .seal-cta-form textarea {
    width:100%; padding:12px 16px; border:0.5px solid var(--c-border);
    border-radius:var(--radius-sm); font-size:.9rem; font-family:var(--font);
    background:#fff; color:var(--c-text); transition:border-color .2s;
}
.seal-cta-form input:focus, .seal-cta-form select:focus, .seal-cta-form textarea:focus {
    outline:none; border-color:var(--seal-purple);
}
.seal-cta-form textarea { min-height:100px; resize:vertical; }
.seal-cta-form button {
    grid-column:1/-1; padding:14px; background:var(--seal-purple);
    color:#fff; border:none; border-radius:50px; font-size:.95rem;
    font-weight:600; cursor:pointer; font-family:var(--font);
    transition:all var(--t);
}
.seal-cta-form button:hover { background:var(--seal-purple-d); transform:translateY(-1px); }

/* ========================================
   YIRAN FILTRATION — 依燃过滤产品线
   配色: 金黄色 #F6D152 / 深海蓝 #001E4D / 暖白 #FFFDF5
   ======================================== */

:root {
    --yiran-fire: #F6D152;
    --yiran-fire-d: #C9A21F;
    --yiran-fire-l: #FCEE9C;
    --yiran-navy: #001E4D;
    --yiran-navy-d: #001233;
    --yiran-navy-l: #2A4A7A;
    --yiran-bg-light: #FFFDF5;
    --yiran-bg-card: #FFF9E2;
    --yiran-bg-blue: #F0F4FA;
    --yiran-accent: #FCEE9C;
}

/* — Hero — */
.yiran-hero {
    position:relative; overflow:hidden;
    background:linear-gradient(135deg, var(--yiran-navy-d) 0%, var(--yiran-navy) 60%, #0a2a5c 100%);
    padding:110px 0 80px; text-align:center; color:#fff;
}
.yiran-hero::before {
    content:''; position:absolute; top:-40%; right:-20%; width:70%; height:120%;
    background:radial-gradient(circle at 70% 30%, rgba(246,209,82,.25), transparent 55%);
    pointer-events:none;
}
.yiran-hero::after {
    content:''; position:absolute; bottom:0; left:0; right:0; height:200px;
    background:linear-gradient(to top, rgba(0,30,77,1), transparent);
    pointer-events:none;
}
.yiran-hero-inner { position:relative; z-index:2; max-width:960px; margin:0 auto; padding:0 24px; }
.yiran-hero-brand { margin-bottom:28px; }
.yiran-hero-brand img { height:56px; width:auto; margin:0 auto; filter:drop-shadow(0 2px 10px rgba(246,209,82,.25)); }
.yiran-hero-title { font-size:clamp(2.2rem,4.5vw,3.6rem); font-weight:800; color:#fff; margin-bottom:18px; line-height:1.1; letter-spacing:-.02em; }
.yiran-hero-pos { display:inline-block; font-size:.85rem; font-weight:700; letter-spacing:.14em; color:#FCEE9C; text-transform:uppercase; margin-bottom:16px; padding:6px 18px; border:2px solid rgba(246,209,82,.5); border-radius:50px; background:rgba(0,30,77,.35); }
.yiran-hero-sub { font-size:clamp(1rem,1.4vw,1.15rem); color:rgba(255,255,255,.85); max-width:720px; margin:0 auto 42px; line-height:1.8; }
.yiran-tagline { font-size:1.05rem; font-weight:500; color:#FCEE9C; margin-bottom:12px; font-style:italic; }
.yiran-pillars {
    display:grid; grid-template-columns:repeat(3,1fr); gap:18px; max-width:840px; margin:0 auto;
}
.yiran-pillar {
    background:rgba(255,255,255,.95); border-radius:var(--radius-lg); padding:24px 20px;
    box-shadow:var(--shadow-sm); border:1px solid rgba(246,209,82,.2); transition:all var(--t); text-align:center;
}
.yiran-pillar:hover { transform:translateY(-3px); box-shadow:var(--shadow-md); }
.yiran-pillar-focus {
    background:linear-gradient(135deg, var(--yiran-fire) 0%, var(--yiran-fire-d) 100%);
    color:var(--c-white); border:none; position:relative; overflow:hidden;
}
.yiran-pillar-focus::after {
    content:''; position:absolute; top:-30%; right:-30%; width:100%; height:100%;
    background:radial-gradient(circle, rgba(255,255,255,.15), transparent 60%); pointer-events:none;
}
.yiran-pillar-icon {
    width:58px; height:58px; border-radius:50%; display:flex; align-items:center; justify-content:center;
    font-weight:800; font-size:1.15rem; margin:0 auto 14px;
}
.yiran-pillar-icon.fire { background:var(--yiran-bg-card); color:var(--yiran-fire); }
.yiran-pillar-icon.ai { background:var(--yiran-bg-blue); color:var(--yiran-navy); }
.yiran-pillar-icon.service { background:var(--yiran-bg-card); color:var(--yiran-fire); }
.yiran-pillar-focus .yiran-pillar-icon { background:rgba(255,255,255,.18); color:#fff; }
.yiran-pillar h3 { font-size:1.05rem; font-weight:700; margin-bottom:8px; color:var(--yiran-navy); }
.yiran-pillar-focus h3 { color:#fff; }
.yiran-pillar p { font-size:.85rem; color:var(--c-text-l); line-height:1.6; }
.yiran-pillar-focus p { color:rgba(255,255,255,.8); }

/* — Filtration Hierarchy — */
.yiran-hierarchy-wrap { display:grid; grid-template-columns:1.2fr 1fr; gap:48px; align-items:center; max-width:1080px; margin:0 auto; }
.yiran-hierarchy-text h3 { font-size:1.5rem; font-weight:700; color:var(--yiran-navy); margin-bottom:16px; }
.yiran-hierarchy-text p { color:var(--c-text-l); line-height:1.8; margin-bottom:18px; }
.yiran-hierarchy-legend { display:flex; flex-wrap:wrap; gap:10px; }
.yiran-hierarchy-legend span { font-size:.75rem; padding:4px 12px; border-radius:50px; font-weight:500; }
.yiran-pyramid { display:flex; flex-direction:column; gap:10px; }
.yiran-pyramid-level { display:flex; align-items:center; justify-content:center; color:#fff; font-weight:600; font-size:.9rem; border-radius:var(--radius); padding:16px 20px; min-height:54px; transition:transform var(--t); }
.yiran-pyramid-level:hover { transform:translateX(6px); }
.yiran-pyramid-level.l1 { background:var(--yiran-navy); width:100%; }
.yiran-pyramid-level.l2 { background:var(--yiran-navy-l); width:92%; margin:0 auto; }
.yiran-pyramid-level.l3 { background:var(--yiran-fire); width:78%; margin:0 auto; }
.yiran-pyramid-level.l4 { background:var(--yiran-fire-d); width:60%; margin:0 auto; }
.yiran-pyramid-level.l5 { background:linear-gradient(90deg, #5D8C9E, #3A7A7A); width:46%; margin:0 auto; }

/* — AI Selection — */
.yiran-ai-block { max-width:var(--max-w); margin:0 auto; padding:0 24px; }
.yiran-ai-card {
    display:flex; align-items:center; gap:40px; background:linear-gradient(135deg, var(--yiran-navy) 0%, var(--yiran-navy-d) 100%);
    border-radius:var(--radius-xl); padding:48px 56px; color:#fff; position:relative; overflow:hidden;
}
.yiran-ai-card::before {
    content:''; position:absolute; top:-50%; right:-10%; width:400px; height:400px;
    background:radial-gradient(circle, rgba(232,149,58,.25), transparent 60%); pointer-events:none;
}
.yiran-ai-text { flex:1; position:relative; z-index:1; }
.yiran-ai-text h3 { font-size:1.4rem; font-weight:700; margin-bottom:8px; }
.yiran-ai-text p { font-size:.95rem; color:rgba(255,255,255,.75); line-height:1.7; margin-bottom:22px; }
.yiran-ai-badge {
    display:inline-flex; align-items:center; gap:6px; font-size:.72rem; font-weight:700; letter-spacing:.05em;
    padding:5px 12px; background:rgba(255,255,255,.12); border:1px solid rgba(255,255,255,.2); border-radius:50px; margin-bottom:14px;
}
.yiran-ai-btn {
    display:inline-flex; align-items:center; gap:8px; padding:12px 26px; background:var(--yiran-fire); color:#fff;
    border-radius:50px; font-weight:600; font-size:.92rem; transition:all var(--t); box-shadow:0 4px 16px rgba(246,209,82,.35);
}
.yiran-ai-btn:hover { background:var(--yiran-fire-l); transform:translateY(-2px); box-shadow:0 8px 24px rgba(246,209,82,.45); }
.yiran-ai-visual {
    width:120px; height:120px; border-radius:50%; background:rgba(255,255,255,.08); border:2px solid rgba(255,255,255,.2);
    display:flex; align-items:center; justify-content:center; font-size:2.6rem; font-weight:900; color:var(--yiran-fire-l);
    position:relative; z-index:1; flex-shrink:0;
}

/* — Product Grid — */
.yiran-products-grid {
    display:grid; grid-template-columns:repeat(4,1fr); gap:22px;
}
.yiran-prod-card {
    background:var(--c-white); border:1px solid var(--c-border); border-radius:var(--radius-lg); padding:22px 18px 18px;
    text-align:center; transition:all var(--t); display:flex; flex-direction:column; align-items:center; position:relative;
}
.yiran-prod-card:hover { border-color:var(--yiran-fire); transform:translateY(-5px); box-shadow:0 12px 32px rgba(246,209,82,.12); }
.yiran-prod-card:hover .yiran-prod-arrow { opacity:1; transform:translateX(0); }
.yiran-prod-img {
    width:100%; height:160px; border-radius:var(--radius); background:var(--c-gray-bg); margin-bottom:16px;
    display:flex; align-items:center; justify-content:center; overflow:hidden; padding:12px;
}
.yiran-prod-img img { max-width:100%; max-height:100%; object-fit:contain; }
.yiran-prod-name { font-size:1rem; font-weight:700; color:var(--yiran-navy); margin-bottom:6px; }
.yiran-prod-hint { font-size:.75rem; color:var(--c-text-l); margin-bottom:10px; line-height:1.4; }
.yiran-prod-series { font-size:.68rem; color:var(--yiran-fire); font-weight:600; background:var(--yiran-bg-card); padding:3px 10px; border-radius:50px; }
.yiran-prod-arrow { position:absolute; top:14px; right:14px; width:28px; height:28px; border-radius:50%; background:var(--yiran-bg-card); color:var(--yiran-fire); display:flex; align-items:center; justify-content:center; font-size:1rem; opacity:0; transform:translateX(-6px); transition:all var(--t); }

/* — Brand Series — */
.yiran-brands-grid {
    display:grid; grid-template-columns:repeat(4,1fr); gap:18px;
}
.yiran-brand-card {
    background:var(--c-white); border:1px solid var(--c-border); border-radius:var(--radius-lg); padding:22px 20px;
    transition:all var(--t); position:relative; overflow:hidden;
}
.yiran-brand-card::before { content:''; position:absolute; top:0; left:0; width:4px; height:100%; background:var(--yiran-fire); opacity:0; transition:opacity var(--t); }
.yiran-brand-card:hover { border-color:var(--yiran-fire); transform:translateY(-3px); box-shadow:var(--shadow-md); }
.yiran-brand-card:hover::before { opacity:1; }
.yiran-brand-code { font-size:.72rem; font-weight:700; color:var(--yiran-fire); letter-spacing:.05em; margin-bottom:8px; }
.yiran-brand-name { font-size:1.05rem; font-weight:700; color:var(--yiran-navy); margin-bottom:6px; }
.yiran-brand-en { font-size:.72rem; color:var(--c-text-l); font-weight:500; margin-bottom:10px; }
.yiran-brand-desc { font-size:.82rem; color:var(--c-text-l); line-height:1.5; }

/* — Industries — */
.yiran-industry-grid {
    display:grid; grid-template-columns:repeat(3,1fr); gap:20px;
}
.yiran-ind-card {
    display:flex; gap:16px; align-items:flex-start; background:var(--c-white); border:1px solid var(--c-border); border-radius:var(--radius-lg);
    padding:22px; transition:all var(--t);
}
.yiran-ind-card:hover { border-color:var(--yiran-fire); transform:translateY(-3px); box-shadow:var(--shadow-md); }
.yiran-ind-icon { width:46px; height:46px; border-radius:50%; background:var(--yiran-bg-card); color:var(--yiran-fire); font-weight:700; font-size:1.1rem; display:flex; align-items:center; justify-content:center; flex-shrink:0; }
.yiran-ind-card h4 { font-size:.98rem; font-weight:700; margin-bottom:4px; color:var(--yiran-navy); }
.yiran-ind-card p { font-size:.82rem; color:var(--c-text-l); line-height:1.5; }

/* — Services — */
.yiran-services-grid { display:grid; grid-template-columns:repeat(3,1fr); gap:24px; }
.yiran-service-card { background:var(--c-white); border-radius:var(--radius-lg); padding:32px 28px; box-shadow:var(--shadow-sm); border:1px solid var(--c-border); transition:all var(--t); }
.yiran-service-card:hover { transform:translateY(-4px); box-shadow:var(--shadow-md); border-color:var(--yiran-fire); }
.yiran-service-icon { width:54px; height:54px; border-radius:50%; background:var(--yiran-bg-card); color:var(--yiran-fire); display:flex; align-items:center; justify-content:center; font-size:1.4rem; font-weight:700; margin-bottom:18px; }
.yiran-service-card h3 { font-size:1.1rem; font-weight:700; color:var(--yiran-navy); margin-bottom:10px; }
.yiran-service-card p { font-size:.88rem; color:var(--c-text-l); line-height:1.7; margin-bottom:8px; }

/* — CTA — */
.yiran-cta { text-align:center; max-width:800px; margin:0 auto; }
.yiran-cta h2 { font-size:1.8rem; font-weight:700; color:var(--yiran-navy); margin-bottom:10px; }
.yiran-cta p { font-size:.95rem; color:var(--c-text-l); margin-bottom:28px; }
.yiran-cta-form { display:grid; grid-template-columns:repeat(2,1fr); gap:14px; text-align:left; }
.yiran-cta-form .full { grid-column:1/-1; }
.yiran-cta-form input, .yiran-cta-form select, .yiran-cta-form textarea { width:100%; padding:13px 16px; border:1px solid var(--c-border); border-radius:var(--radius-sm); font-size:.9rem; background:var(--c-white); transition:all var(--t); font-family:var(--font); }
.yiran-cta-form input:focus, .yiran-cta-form select:focus, .yiran-cta-form textarea:focus { outline:none; border-color:var(--yiran-fire); box-shadow:0 0 0 3px rgba(246,209,82,.1); }
.yiran-cta-form textarea { min-height:100px; resize:vertical; }
.yiran-cta-form button { grid-column:1/-1; padding:14px; background:var(--yiran-fire); color:#fff; border:none; border-radius:var(--radius-sm); font-weight:600; font-size:1rem; cursor:pointer; transition:all var(--t); }
.yiran-cta-form button:hover { background:var(--yiran-fire-d); transform:translateY(-1px); }

/* — responsive — */
@media (max-width:1024px) {
    .yiran-products-grid, .yiran-brands-grid { grid-template-columns:repeat(3,1fr); }
    .yiran-industry-grid, .yiran-services-grid { grid-template-columns:repeat(2,1fr); }
    .yiran-hierarchy-wrap { grid-template-columns:1fr; gap:32px; }
    .yiran-pyramid { order:-1; }
}
@media (max-width:768px) {
    .yiran-hero { padding:80px 0 60px; }
    .yiran-pillars { grid-template-columns:1fr; gap:14px; }
    .yiran-products-grid, .yiran-brands-grid { grid-template-columns:repeat(2,1fr); gap:14px; }
    .yiran-industry-grid, .yiran-services-grid { grid-template-columns:1fr; }
    .yiran-ai-card { flex-direction:column; text-align:center; padding:28px 20px; }
    .yiran-ai-visual { width:80px; height:80px; font-size:2rem; }
    .yiran-cta-form { grid-template-columns:1fr; }
    .yiran-pyramid-level { font-size:.8rem; padding:12px 14px; }
}


/* ========================================
   Dropdown Submenu
   ======================================== */
.nav-item.has-dropdown { position: relative; }
.nav-arrow { font-size: .65rem; margin-left: 3px; vertical-align: middle; transition: transform .2s; }
.nav-dropdown {
    display: none;
    position: absolute; top: calc(100% + 8px); left: 50%; transform: translateX(-50%);
    min-width: 200px; background: #fff; border-radius: 12px;
    border: 1px solid rgba(0,0,0,.06);
    box-shadow: 0 16px 48px rgba(0,0,0,.18), 0 4px 12px rgba(0,0,0,.08);
    padding: 8px 0; list-style: none; margin: 0; z-index: 1200;
}
.nav-dropdown::before {
    content: ''; position: absolute; top: -6px; left: 50%; transform: translateX(-50%) rotate(45deg);
    width: 12px; height: 12px; background: #fff; border-left: 1px solid rgba(0,0,0,.06); border-top: 1px solid rgba(0,0,0,.06);
}
.has-dropdown:hover .nav-dropdown { display: block; }
.has-dropdown:hover .nav-arrow { transform: rotate(180deg); }
.nav-dropdown-link {
    display: block; padding: 10px 20px; font-size: .85rem; color: var(--c-text);
    white-space: nowrap; text-decoration: none; transition: background .2s, color .2s;
}
.nav-dropdown-link:hover {
    background: rgba(26,58,92,.06); color: var(--c-tech-blue);
}
.nav-dropdown-link:last-child {
    border-top: 1px solid var(--c-border); margin-top: 4px; padding-top: 12px;
    font-weight: 600; color: var(--c-tech-blue);
}

@media (max-width:1024px) {
    .nav-dropdown {
        position: static; transform: none; box-shadow: none;
        background: transparent; padding-left: 20px; display: none; min-width: auto;
    }
    .has-dropdown.open .nav-dropdown { display: block; }
    .has-dropdown.open .nav-arrow { transform: rotate(180deg); }
    .nav-dropdown-link { padding: 8px 16px; font-size: .8rem; }
    .nav-dropdown-link:last-child { border-top: none; margin-top: 0; padding-top: 8px; }
}

/* ---- Solution Page Grid & Cards ---- */
:root { --c-bg: #f8fafc; }

.grid-4 {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 20px;
}

.stat-card {
    background: var(--c-white);
    border: 1px solid var(--c-border);
    border-radius: var(--radius-lg);
    transition: all var(--t);
    box-shadow: var(--shadow-sm);
}
.stat-card:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-lg);
}

.btn-outline {
    display: inline-block;
    padding: 10px 22px;
    border: 1.5px solid var(--c-primary);
    border-radius: 6px;
    color: var(--c-primary);
    font-size: .88rem;
    font-weight: 600;
    text-decoration: none;
    transition: all .2s;
}
.btn-outline:hover {
    background: var(--c-primary);
    color: var(--c-white);
}


@media (max-width: 640px) {
    .grid-4 { grid-template-columns: 1fr; }
}

/* ============================================
   Mega Menu (Tesla-style full-width panel)
   ============================================ */
.mega-menu {
    display: none;
    position: fixed;
    top: 68px;
    left: 0;
    right: 0;
    width: 100%;
    background: #fff;
    border-top: 1px solid #F0F0F5;
    box-shadow: 0 16px 48px rgba(0,0,0,.08);
    padding: 36px 0 40px;
    z-index: 1099;
    animation: megaFadeIn .28s ease-out;
}
@keyframes megaFadeIn {
    from { opacity: 0; transform: translateY(-8px); }
    to { opacity: 1; transform: translateY(0); }
}
.mega-menu.active { display: block; }

.mega-inner { max-width: 1280px; margin: 0 auto; padding: 0 48px; display: grid; grid-template-columns: 1fr 220px; gap: 56px; }
.mega-main { display: grid; grid-template-columns: repeat(4, 1fr); gap: 18px; }
.mega-card { text-align: center; cursor: pointer; text-decoration: none; color: inherit; }
.mega-card-img { aspect-ratio: 4/3; border-radius: 12px; overflow: hidden; background: #fff; margin-bottom: 12px; transition: transform .25s; border: 1px solid #F0F0F5; }
.mega-card:hover .mega-card-img { transform: scale(1.04); border-color: #1A3A5C; }
.mega-card-img img { width: 100%; height: 100%; object-fit: cover; display: block; }
.mega-card-name { font-size: .92rem; font-weight: 600; color: #0F1724; margin-bottom: 4px; }

.mega-side { padding-top: 4px; border-left: 1px solid #F0F0F5; padding-left: 32px; }
.mega-side-title { font-size: .78rem; font-weight: 700; color: #0F1724; margin-bottom: 16px; letter-spacing: .05em; text-transform: uppercase; }
.mega-side a { display: block; font-size: .85rem; color: #5a6470; padding: 8px 0; text-decoration: none; transition: color .15s; }
.mega-side a:hover { color: #7C3AED; }

/* Mobile fallback */
@media (max-width: 1024px) {
    .mega-menu { position: static; transform: none; box-shadow: none; padding: 12px 0; border-top: 1px solid #F0F0F5; }
    .mega-inner { grid-template-columns: 1fr; padding: 0 24px; gap: 16px; }
    .mega-main { grid-template-columns: repeat(2, 1fr); gap: 12px; }
    .mega-side { border-left: none; padding-left: 0; border-top: 1px solid #F0F0F5; padding-top: 16px; }
    @keyframes megaFadeIn { from { opacity: 0; } to { opacity: 1; } }
}
@media (max-width: 600px) {
    .mega-main { grid-template-columns: 1fr; }
}

/* Nav item wrapper for mega menu */
.nav-item.has-mega { position: relative; }

/* ========================================
   Mobile Optimization (H5) — 全站移动端规则
   ======================================== */

/* 超窄屏 (≤480px) */
@media (max-width: 480px) {
    .pillars-grid,
    .news-grid,
    .about-stats-grid,
    .about-method-grid,
    .about-cta-grid,
    .brand-matrix,
    .trust-grid { grid-template-columns: 1fr !important; }
    .scene-cards { gap: 8px !important; }
    .pillar-card { padding: 20px 16px !important; }
    .about-cta-card { padding: 24px 16px !important; }
}

/* ========================================
   H5 / Mobile Comprehensive (768px / 480px)
   ======================================== */
@media (max-width: 480px) {
    .scene-cards { flex-wrap: wrap !important; }
    .scene-cards > a { flex: 1 1 calc(50% - 5px) !important; }
    .brand-matrix { grid-template-columns: 1fr !important; }
    .footer-links { grid-template-columns: 1fr !important; }
    .mega-main { grid-template-columns: 1fr !important; }
    .ai-floating-btn { width: 44px !important; height: 44px !important; bottom: 12px !important; right: 12px !important; }
    .ai-island-panel { right: 12px !important; bottom: 64px !important; }
}

@media (max-width: 480px) {
    .grid-4 { grid-template-columns: 1fr !important; }
}

/* ====== H5 Scene Cards 2×2 ====== */

/* === Mobile Nav Mega Menu Fix === */

/* =========================================
   统一 H5 移动端适配 (tablet 1024 / phone 768 / small 480)
   ========================================= */
@media (max-width: 1024px) {
    .nav-menu { display: none; flex-direction: column; position: absolute; top: 60px; left: 0; right: 0; background: #fff; border-bottom: 1px solid #F0F0F5; box-shadow: 0 12px 40px rgba(0,0,0,.08); z-index: 2000; padding: 12px 0; max-height: calc(100vh - 60px); overflow-y: auto; }
    .nav-menu.active { display: flex; }
    .nav-menu .nav-link { padding: 12px 24px; font-size: .95rem; border-bottom: 1px solid #F5F5F8; }
    .hamburger { display: flex; }
    .nav-item.has-mega { position: relative; }
    .mega-menu { position: static !important; width: 100% !important; box-shadow: none !important; padding: 0 !important; background: #FAFAFC !important; border-top: 1px solid #F0F0F5 !important; }
    .mega-menu .mega-inner { grid-template-columns: 1fr !important; padding: 12px 24px !important; }
    .mega-main { grid-template-columns: repeat(2, 1fr) !important; gap: 8px !important; }
    .mega-side { display: none !important; }
    .container { padding: 0 20px !important; }
}

@media (max-width: 768px) {
    /* 通用 */
    section { padding: 48px 0 !important; }
    h1, .hero-title, .page-hero-title { font-size: clamp(1.6rem, 6vw, 2rem) !important; line-height: 1.2 !important; }
    h2, .section-title { font-size: 1.3rem !important; }
    .section-label { font-size: .6rem !important; }
    .container { padding: 0 16px !important; }

    /* Hero */
    .hero { min-height: auto !important; padding: 80px 0 60px !important; }
    .hero-inner { padding: 0 16px !important; }
    .hero-tag { font-size: .72rem !important; margin-bottom: 20px !important; }
    .hero-title { font-size: clamp(1.5rem, 7vw, 2rem) !important; }
    .hero-subtitle { font-size: .88rem !important; }
    .hero-scroll { display: none !important; }
    .hero-particles { opacity: .3 !important; }

    /* Scene cards → 2×2 */
    .scene-cards { display: grid !important; grid-template-columns: repeat(2, 1fr) !important; gap: 10px !important; }
    .scene-cards > a { flex-direction: column !important; padding: 18px 12px !important; border-radius: 12px !important; background: rgba(255,255,255,.05) !important; border: 1px solid rgba(255,255,255,.08) !important; text-decoration: none !important; display: flex !important; align-items: center !important; justify-content: center !important; }
    .scene-icon { width: 40px !important; height: 40px !important; margin-bottom: 8px !important; }
    .scene-icon svg { width: 22px !important; height: 22px !important; }
    .scene-label { font-size: .78rem !important; color: rgba(255,255,255,.6) !important; }

    /* Pillars */
    .pillars-grid { grid-template-columns: 1fr !important; gap: 14px !important; }
    .pillar-card { padding: 20px 18px !important; }
    .pillar-label { font-size: 1rem !important; }

    /* Brand matrix */
    .brand-matrix { grid-template-columns: repeat(2, 1fr) !important; gap: 12px !important; }
    .brand-matrix-card { padding: 16px 12px !important; }
    .brand-matrix-logo img { height: 26px !important; }

    /* Trust */
    .trust-grid { grid-template-columns: repeat(2, 1fr) !important; gap: 14px !important; }
    .trust-item { padding: 16px !important; }
    .trust-num { font-size: 1.5rem !important; }

    /* News */
    .news-grid { grid-template-columns: 1fr !important; gap: 14px !important; }

    /* About */
    .about-hero { min-height: 70vh !important; }
    .about-hero-inner h1 { font-size: clamp(1.4rem, 5vw, 1.8rem) !important; }
    .about-hero-inner p { font-size: .85rem !important; }
    .about-stats-grid { grid-template-columns: 1fr !important; }
    .about-stat-item { padding: 20px !important; }

    /* Page hero (子页) */
    .page-hero { padding: 50px 0 24px !important; }
    .page-hero-inner { flex-direction: column !important; text-align: center !important; }
    .page-hero-img { order: -1; max-width: 100px !important; margin: 0 auto 16px !important; }
    .page-hero-sub { font-size: .85rem !important; }

    /* Product hero */
    .prod-hero { padding: 40px 0 28px !important; }
    .prod-hero-inner { grid-template-columns: 1fr !important; text-align: center !important; gap: 20px !important; }
    .prod-hero-img { max-width: 140px !important; margin: 0 auto !important; order: -1 !important; }
    .prod-hero-sub { margin: 0 auto 20px !important; }
    .prod-hero-stats { justify-content: center !important; gap: 16px !important; }
    .prod-page { padding: 36px 16px !important; }
    .prod-spec-table { font-size: .72rem !important; }
    .prod-spec-table td, .prod-spec-table th { padding: 8px 10px !important; }
    .prod-grade-list { grid-template-columns: repeat(2, 1fr) !important; gap: 10px !important; }
    .prod-industries { grid-template-columns: repeat(2, 1fr) !important; }

    /* 工程制品 grid */
    .eng-grid { grid-template-columns: 1fr !important; }
    .eng-card { flex-direction: column !important; }
    .eng-card-img { width: 100% !important; height: 200px !important; }

    /* Footer */
    .footer-top { grid-template-columns: 1fr !important; gap: 24px !important; }
    .footer-links { grid-template-columns: repeat(2, 1fr) !important; gap: 16px !important; }
    .footer-bottom { text-align: center !important; }

    /* Grid helpers */
    .grid-4, .grid-4 > * { grid-template-columns: repeat(2, 1fr) !important; }

    /* O-ring calculator */
    [style*="grid-template-columns: 1fr 1fr"] { grid-template-columns: 1fr !important; }

    /* Dynamic Island */
    .ai-floating-btn { width: 46px !important; height: 46px !important; bottom: 16px !important; right: 16px !important; }
    .ai-island-panel { right: 16px !important; bottom: 70px !important; max-width: calc(100vw - 32px) !important; }

    /* 表格溢出 */
    table { display: block; overflow-x: auto; -webkit-overflow-scrolling: touch; }

    /* 触摸优化 */
    a, button, .mega-card, .pillar-card, .scene-card { min-height: 44px; }
    input, select, textarea { font-size: 16px !important; }
}

@media (max-width: 480px) {
    .hero { padding: 60px 0 48px !important; }
    .hero-inner { padding: 0 12px !important; }
    .scene-cards > a { padding: 14px 8px !important; }
    .scene-icon { width: 36px !important; height: 36px !important; }
    .scene-icon svg { width: 20px !important; height: 20px !important; }
    .scene-label { font-size: .72rem !important; }

    .brand-matrix { grid-template-columns: 1fr !important; }
    .trust-grid { grid-template-columns: 1fr !important; }
    /* Footer 强制单列撑满 + 3列横向分布（左中右），不被任何级联规则压缩 */
    .footer-top { grid-template-columns: 1fr !important; gap: 16px !important; }
    .footer-brand, .footer-links { grid-column: 1 / -1 !important; width: 100% !important; }
    .footer-links { grid-template-columns: repeat(3, 1fr) !important; gap: 10px !important; text-align: left !important; }
    .footer-col h4 { font-size: .72rem !important; margin-bottom: 6px !important; }
    .footer-col ul li { margin-bottom: 3px !important; }
    .footer-col ul li a { font-size: .72rem !important; }
    .mega-main { grid-template-columns: 1fr !important; }

    .prod-grade-list { grid-template-columns: 1fr !important; }
    .prod-industries { grid-template-columns: 1fr !important; }

    .page-hero { padding: 40px 0 20px !important; }
    .page-hero-title { font-size: 1.3rem !important; }

    .ai-floating-btn { width: 42px !important; height: 42px !important; bottom: 12px !important; right: 12px !important; }
}

/* 触摸设备全局 */
@media (hover: none) and (pointer: coarse) {
    .mega-menu, .nav-dropdown { display: none !important; }
}

/* 大屏幕自适应 (1440+ / 1920+) */
@media (min-width: 1440px) {
    .hero-inner { max-width: 1280px; padding: 0 48px; }
    .hero-tag { font-size: .85rem !important; margin-bottom: 36px !important; }
    .hero-title { font-size: clamp(3rem, 4vw, 4.5rem) !important; line-height: 1.1 !important; letter-spacing: -.02em; }
    .hero-subtitle { font-size: 1.15rem !important; max-width: 720px !important; margin: 24px auto 36px !important; }
    .hero-hero-stats, .scene-cards { max-width: 1080px; margin: 0 auto; }
    .scene-cards { gap: 28px !important; }
}

@media (min-width: 1920px) {
    .hero-inner { max-width: 1440px; }
    .hero-title { font-size: clamp(3.5rem, 4.5vw, 5rem) !important; }
    .hero-subtitle { font-size: 1.25rem !important; }
    .scene-cards { max-width: 1200px; gap: 36px !important; }
}

/* === 表格移动端：水平滚动 + 首列吸顶 === */
@media (max-width: 768px) {
    .table-scroll {
        overflow-x: auto;
        -webkit-overflow-scrolling: touch;
        border: 1px solid var(--c-border);
        border-radius: 8px;
        margin: 16px 0;
    }
    .table-scroll table {
        min-width: 600px;
        width: 100%;
        border-collapse: collapse;
    }
    .table-scroll th:first-child,
    .table-scroll td:first-child {
        position: sticky;
        left: 0;
        background: #fff;
        z-index: 2;
        box-shadow: 2px 0 4px rgba(0,0,0,.06);
        min-width: 100px;
        max-width: 120px;
    }
    .table-scroll th:first-child {
        background: #1A3A5C;
        color: #fff;
    }
    .table-scroll td {
        padding: 12px 10px !important;
        white-space: nowrap;
        border-bottom: 1px solid #F5F5F8;
    }
    .table-scroll th {
        padding: 10px 8px !important;
        white-space: nowrap;
        font-size: .76rem;
    }
    /* 移动端隐藏表格，改用卡片式堆叠 */
    .table-scroll-mobile-card {
        display: none;
    }
}
@media (min-width: 769px) {
    .table-scroll-mobile-card { display: none !important; }
}


/* Solutions 卡片移动端 1 列 */
@media (max-width: 768px) {
    .eng-hub-card {
        flex-direction: column !important;
        gap: 0 !important;
    }
    .eng-hub-visual {
        width: 100% !important;
        min-height: 180px !important;
        height: 180px !important;
    }
    .eng-hub-body {
        padding: 16px !important;
    }
    .eng-hub-body h3 {
        font-size: 1.1rem !important;
    }
    .eng-hub-desc {
        font-size: .85rem !important;
        line-height: 1.6 !important;
    }
    .eng-hub-stats {
        gap: 16px !important;
        flex-wrap: wrap !important;
    }
    .eng-hub-stat {
        flex: 1 1 calc(50% - 8px) !important;
        min-width: 100px !important;
    }
    .eng-hub-stat strong {
        font-size: 1.1rem !important;
    }
}
/* Solutions 卡片移动端 1 列（覆盖 inline grid） */
@media (max-width: 768px) {
    .eng-hub-grid,
    .eng-hub-grid[style*="grid-template-columns"] {
        grid-template-columns: 1fr !important;
    }
}
/* clear mobile overrides — no !important, single source of truth */
@media (max-width: 768px) {
  body { font-size: 15px; -webkit-text-size-adjust: 100%; }

  /* cards strip down to single column */
  .eng-hub-grid { grid-template-columns: 1fr; gap: 20px; padding: 0 4px; }
  .eng-hub-card { flex-direction: column; border-radius: 12px; }
  .eng-hub-visual { width: 100%; height: 200px; border-radius: 10px 10px 0 0; }
  .eng-hub-body { padding: 20px 16px 24px; }
  .eng-hub-body h3 { font-size: 1.05rem; margin-bottom: 6px; }
  .eng-hub-desc { font-size: .85rem; line-height: 1.7; margin-bottom: 14px; }
  .eng-hub-stats { flex-wrap: wrap; gap: 12px; }
  .eng-hub-stat { min-width: 80px; }

  /* comparison table: horizontal scroll */
  .tech-table { min-width: 580px; }
  .table-scroll { overflow-x: auto; }

  /* section spacing */
  .section { padding: 40px 0; }
  .section-header { margin-bottom: 24px; }
  .section-title { font-size: 1.25rem; }
  .section-desc { font-size: .85rem; line-height: 1.7; }

  /* buttons */
  .btn { padding: 10px 20px; font-size: .85rem; }
}


/* Footer 移动端 2 列紧凑布局 */
@media (max-width: 768px) {
  .footer-top {
    grid-template-columns: 1fr 1fr;
    gap: 20px 16px;
    text-align: left;
  }
  .footer-brand {
    grid-column: 1 / -1;
    text-align: center;
    margin-bottom: 6px;
  }
  .footer-tagline {
    font-size: .72rem !important;
  }
  .footer-col h4 {
    font-size: .75rem !important;
    margin-bottom: 8px !important;
  }
  .footer-col ul li {
    margin-bottom: 4px !important;
  }
  .footer-col ul li a {
    font-size: .78rem;
  }
  .footer-bottom p {
    font-size: .7rem;
  }
}

/* ---- Nav User Pill (login state indicator) ---- */
.nav-user { position:relative; }
.nav-user-pill {
  display:flex; align-items:center; gap:8px; padding:4px 12px 4px 4px;
  background:var(--c-gray-bg); border:1px solid var(--c-border); border-radius:24px;
  cursor:pointer; transition:all var(--t); font-family:inherit;
}
.nav-user-pill:hover { border-color:var(--c-tech-blue); }
.nav-user-avatar {
  width:28px; height:28px; border-radius:50%; background:linear-gradient(135deg,#7C3AED,#5B21B6);
  color:#fff; font-size:.72rem; font-weight:700; display:flex; align-items:center; justify-content:center;
  flex-shrink:0; user-select:none;
}
.nav-user-name { font-size:.78rem; font-weight:500; color:var(--c-text); max-width:120px; overflow:hidden; text-overflow:ellipsis; white-space:nowrap; }
.nav-user-tier {
  font-size:.62rem; font-weight:700; padding:1px 6px; border-radius:10px; letter-spacing:.02em;
}
.nav-user-tier.t2 { background:rgba(59,130,246,.12); color:#3b82f6; }
.nav-user-tier.t3 { background:rgba(16,185,129,.12); color:#059669; }

.nav-user-dropdown {
  position:absolute; top:calc(100% + 8px); right:0; background:#fff; border-radius:12px;
  box-shadow:0 8px 30px rgba(0,0,0,.12); min-width:220px; padding:8px; z-index:1000;
  opacity:0; transform:translateY(-6px); pointer-events:none; transition:all .2s cubic-bezier(.4,0,.2,1);
}
.nav-user-dropdown.show { opacity:1; transform:translateY(0); pointer-events:auto; }
.nav-user-dd-header { padding:12px 12px 8px; border-bottom:1px solid #F0F0F5; margin-bottom:4px; }
.nav-user-dd-email { font-size:.82rem; font-weight:600; color:var(--c-text); word-break:break-all; }
.nav-user-dd-tier { font-size:.68rem; color:#6B7280; margin-top:2px; }
.nav-user-dd-item {
  display:block; width:100%; padding:10px 12px; border:none; background:none; font-size:.8rem; font-family:inherit;
  color:var(--c-text); cursor:pointer; border-radius:8px; text-align:left; text-decoration:none;
  transition:background .15s;
}
.nav-user-dd-item:hover { background:#F5F3FF; }
.nav-user-dd-logout { color:#DC2626 !important; font-weight:600; }
.nav-user-dd-logout:hover { background:#FEF2F2 !important; }

.nav-login-btn {
  padding:6px 14px; background:linear-gradient(135deg,#7C3AED,#5B21B6); color:#fff; border:none;
  border-radius:20px; font-size:.78rem; font-weight:600; cursor:pointer; text-decoration:none;
  transition:opacity .15s;
}
.nav-login-btn:hover { opacity:.85; }

@media(max-width:1024px) {
  .nav-user-pill { padding:2px 8px 2px 2px; }
  .nav-user-avatar { width:24px; height:24px; font-size:.65rem; }
  .nav-user-name { display:none; }
  .nav-user-tier { font-size:.58rem; }
  .nav-login-btn { padding:4px 12px; font-size:.72rem; }
}
@media(max-width:480px) {
  .nav-user { order:3; margin-left:auto; }
  .nav-user-tier { display:none; }
  .nav-user-dd-header { padding:8px 10px 6px; }
  .nav-user-dd-email { font-size:.75rem; }
  .nav-user-dd-item { font-size:.74rem; padding:8px 10px; }
}